[PATCH bpf-next v8 4/5] libbpf: add missing SPDX-License-Identifier
Signed-off-by: Eric Leblond <e...@regit.org> Acked-by: Alexei Starovoitov <a...@kernel.org> --- tools/lib/bpf/bpf.c| 2 ++ tools/lib/bpf/bpf.h| 2 ++ tools/lib/bpf/libbpf.c | 2 ++ tools/lib/bpf/libbpf.h | 2 ++ 4 files changed, 8 insertions(+) diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c index 9c88f6e4156d..592a58a2b681 100644 --- a/tools/lib/bpf/bpf.c +++ b/tools/lib/bpf/bpf.c @@ -1,3 +1,5 @@ +// SPDX-License-Identifier: LGPL-2.1 + /* * common eBPF ELF operations. * diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h index 9f44c196931e..8d18fb73d7fb 100644 --- a/tools/lib/bpf/bpf.h +++ b/tools/lib/bpf/bpf.h @@ -1,3 +1,5 @@ +/* SPDX-License-Identifier: LGPL-2.1 */ + /* * common eBPF ELF operations. * diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index c60122d3ea85..71ddc481f349 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -1,3 +1,5 @@ +// SPDX-License-Identifier: LGPL-2.1 + /* * Common eBPF ELF object loading operations. * diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h index e42f96900318..f85906533cdd 100644 --- a/tools/lib/bpf/libbpf.h +++ b/tools/lib/bpf/libbpf.h @@ -1,3 +1,5 @@ +/* SPDX-License-Identifier: LGPL-2.1 */ + /* * Common eBPF ELF object loading operations. * -- 2.15.1
[PATCH bpf-next v8 4/5] libbpf: add missing SPDX-License-Identifier
Signed-off-by: Eric Leblond Acked-by: Alexei Starovoitov --- tools/lib/bpf/bpf.c| 2 ++ tools/lib/bpf/bpf.h| 2 ++ tools/lib/bpf/libbpf.c | 2 ++ tools/lib/bpf/libbpf.h | 2 ++ 4 files changed, 8 insertions(+) diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c index 9c88f6e4156d..592a58a2b681 100644 --- a/tools/lib/bpf/bpf.c +++ b/tools/lib/bpf/bpf.c @@ -1,3 +1,5 @@ +// SPDX-License-Identifier: LGPL-2.1 + /* * common eBPF ELF operations. * diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h index 9f44c196931e..8d18fb73d7fb 100644 --- a/tools/lib/bpf/bpf.h +++ b/tools/lib/bpf/bpf.h @@ -1,3 +1,5 @@ +/* SPDX-License-Identifier: LGPL-2.1 */ + /* * common eBPF ELF operations. * diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index c60122d3ea85..71ddc481f349 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -1,3 +1,5 @@ +// SPDX-License-Identifier: LGPL-2.1 + /* * Common eBPF ELF object loading operations. * diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h index e42f96900318..f85906533cdd 100644 --- a/tools/lib/bpf/libbpf.h +++ b/tools/lib/bpf/libbpf.h @@ -1,3 +1,5 @@ +/* SPDX-License-Identifier: LGPL-2.1 */ + /* * Common eBPF ELF object loading operations. * -- 2.15.1
[PATCH bpf-next v8 2/5] libbpf: add function to setup XDP
Most of the code is taken from set_link_xdp_fd() in bpf_load.c and
slightly modified to be library compliant.
Signed-off-by: Eric Leblond <e...@regit.org>
Acked-by: Alexei Starovoitov <a...@kernel.org>
---
tools/lib/bpf/bpf.c| 122 +
tools/lib/bpf/libbpf.c | 2 +
tools/lib/bpf/libbpf.h | 4 ++
3 files changed, 128 insertions(+)
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index 5128677e4117..bf2772566240 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -25,6 +25,12 @@
#include
#include
#include "bpf.h"
+#include "libbpf.h"
+#include "nlattr.h"
+#include
+#include
+#include
+#include
/*
* When building perf, unistd.h is overridden. __NR_bpf is
@@ -46,7 +52,9 @@
# endif
#endif
+#ifndef min
#define min(x, y) ((x) < (y) ? (x) : (y))
+#endif
static inline __u64 ptr_to_u64(const void *ptr)
{
@@ -413,3 +421,117 @@ int bpf_obj_get_info_by_fd(int prog_fd, void *info, __u32
*info_len)
return err;
}
+
+int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
+{
+ struct sockaddr_nl sa;
+ int sock, seq = 0, len, ret = -1;
+ char buf[4096];
+ struct nlattr *nla, *nla_xdp;
+ struct {
+ struct nlmsghdr nh;
+ struct ifinfomsg ifinfo;
+ char attrbuf[64];
+ } req;
+ struct nlmsghdr *nh;
+ struct nlmsgerr *err;
+ socklen_t addrlen;
+
+ memset(, 0, sizeof(sa));
+ sa.nl_family = AF_NETLINK;
+
+ sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
+ if (sock < 0) {
+ return -errno;
+ }
+
+ if (bind(sock, (struct sockaddr *), sizeof(sa)) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ addrlen = sizeof(sa);
+ if (getsockname(sock, (struct sockaddr *), ) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ if (addrlen != sizeof(sa)) {
+ ret = -LIBBPF_ERRNO__INTERNAL;
+ goto cleanup;
+ }
+
+ memset(, 0, sizeof(req));
+ req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
+ req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
+ req.nh.nlmsg_type = RTM_SETLINK;
+ req.nh.nlmsg_pid = 0;
+ req.nh.nlmsg_seq = ++seq;
+ req.ifinfo.ifi_family = AF_UNSPEC;
+ req.ifinfo.ifi_index = ifindex;
+
+ /* started nested attribute for XDP */
+ nla = (struct nlattr *)(((char *))
+ + NLMSG_ALIGN(req.nh.nlmsg_len));
+ nla->nla_type = NLA_F_NESTED | IFLA_XDP;
+ nla->nla_len = NLA_HDRLEN;
+
+ /* add XDP fd */
+ nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
+ nla_xdp->nla_type = IFLA_XDP_FD;
+ nla_xdp->nla_len = NLA_HDRLEN + sizeof(int);
+ memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(fd));
+ nla->nla_len += nla_xdp->nla_len;
+
+ /* if user passed in any flags, add those too */
+ if (flags) {
+ nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
+ nla_xdp->nla_type = IFLA_XDP_FLAGS;
+ nla_xdp->nla_len = NLA_HDRLEN + sizeof(flags);
+ memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(flags));
+ nla->nla_len += nla_xdp->nla_len;
+ }
+
+ req.nh.nlmsg_len += NLA_ALIGN(nla->nla_len);
+
+ if (send(sock, , req.nh.nlmsg_len, 0) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ len = recv(sock, buf, sizeof(buf), 0);
+ if (len < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ for (nh = (struct nlmsghdr *)buf; NLMSG_OK(nh, len);
+nh = NLMSG_NEXT(nh, len)) {
+ if (nh->nlmsg_pid != sa.nl_pid) {
+ ret = -LIBBPF_ERRNO__WRNGPID;
+ goto cleanup;
+ }
+ if (nh->nlmsg_seq != seq) {
+ ret = -LIBBPF_ERRNO__INVSEQ;
+ goto cleanup;
+ }
+ switch (nh->nlmsg_type) {
+ case NLMSG_ERROR:
+ err = (struct nlmsgerr *)NLMSG_DATA(nh);
+ if (!err->error)
+ continue;
+ ret = err->error;
+ goto cleanup;
+ case NLMSG_DONE:
+ break;
+ default:
+ break;
+ }
+ }
+
+ ret = 0;
+
+cleanup:
+ close(sock);
+ return ret;
+}
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 30c776375118..c60122d3ea85 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -106,6 +106,8 @@ static const char *libbpf_strerror_table[NR_ERRNO] = {
[ERRCO
[PATCH bpf-next v8 2/5] libbpf: add function to setup XDP
Most of the code is taken from set_link_xdp_fd() in bpf_load.c and
slightly modified to be library compliant.
Signed-off-by: Eric Leblond
Acked-by: Alexei Starovoitov
---
tools/lib/bpf/bpf.c| 122 +
tools/lib/bpf/libbpf.c | 2 +
tools/lib/bpf/libbpf.h | 4 ++
3 files changed, 128 insertions(+)
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index 5128677e4117..bf2772566240 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -25,6 +25,12 @@
#include
#include
#include "bpf.h"
+#include "libbpf.h"
+#include "nlattr.h"
+#include
+#include
+#include
+#include
/*
* When building perf, unistd.h is overridden. __NR_bpf is
@@ -46,7 +52,9 @@
# endif
#endif
+#ifndef min
#define min(x, y) ((x) < (y) ? (x) : (y))
+#endif
static inline __u64 ptr_to_u64(const void *ptr)
{
@@ -413,3 +421,117 @@ int bpf_obj_get_info_by_fd(int prog_fd, void *info, __u32
*info_len)
return err;
}
+
+int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
+{
+ struct sockaddr_nl sa;
+ int sock, seq = 0, len, ret = -1;
+ char buf[4096];
+ struct nlattr *nla, *nla_xdp;
+ struct {
+ struct nlmsghdr nh;
+ struct ifinfomsg ifinfo;
+ char attrbuf[64];
+ } req;
+ struct nlmsghdr *nh;
+ struct nlmsgerr *err;
+ socklen_t addrlen;
+
+ memset(, 0, sizeof(sa));
+ sa.nl_family = AF_NETLINK;
+
+ sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
+ if (sock < 0) {
+ return -errno;
+ }
+
+ if (bind(sock, (struct sockaddr *), sizeof(sa)) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ addrlen = sizeof(sa);
+ if (getsockname(sock, (struct sockaddr *), ) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ if (addrlen != sizeof(sa)) {
+ ret = -LIBBPF_ERRNO__INTERNAL;
+ goto cleanup;
+ }
+
+ memset(, 0, sizeof(req));
+ req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
+ req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
+ req.nh.nlmsg_type = RTM_SETLINK;
+ req.nh.nlmsg_pid = 0;
+ req.nh.nlmsg_seq = ++seq;
+ req.ifinfo.ifi_family = AF_UNSPEC;
+ req.ifinfo.ifi_index = ifindex;
+
+ /* started nested attribute for XDP */
+ nla = (struct nlattr *)(((char *))
+ + NLMSG_ALIGN(req.nh.nlmsg_len));
+ nla->nla_type = NLA_F_NESTED | IFLA_XDP;
+ nla->nla_len = NLA_HDRLEN;
+
+ /* add XDP fd */
+ nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
+ nla_xdp->nla_type = IFLA_XDP_FD;
+ nla_xdp->nla_len = NLA_HDRLEN + sizeof(int);
+ memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(fd));
+ nla->nla_len += nla_xdp->nla_len;
+
+ /* if user passed in any flags, add those too */
+ if (flags) {
+ nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
+ nla_xdp->nla_type = IFLA_XDP_FLAGS;
+ nla_xdp->nla_len = NLA_HDRLEN + sizeof(flags);
+ memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(flags));
+ nla->nla_len += nla_xdp->nla_len;
+ }
+
+ req.nh.nlmsg_len += NLA_ALIGN(nla->nla_len);
+
+ if (send(sock, , req.nh.nlmsg_len, 0) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ len = recv(sock, buf, sizeof(buf), 0);
+ if (len < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ for (nh = (struct nlmsghdr *)buf; NLMSG_OK(nh, len);
+nh = NLMSG_NEXT(nh, len)) {
+ if (nh->nlmsg_pid != sa.nl_pid) {
+ ret = -LIBBPF_ERRNO__WRNGPID;
+ goto cleanup;
+ }
+ if (nh->nlmsg_seq != seq) {
+ ret = -LIBBPF_ERRNO__INVSEQ;
+ goto cleanup;
+ }
+ switch (nh->nlmsg_type) {
+ case NLMSG_ERROR:
+ err = (struct nlmsgerr *)NLMSG_DATA(nh);
+ if (!err->error)
+ continue;
+ ret = err->error;
+ goto cleanup;
+ case NLMSG_DONE:
+ break;
+ default:
+ break;
+ }
+ }
+
+ ret = 0;
+
+cleanup:
+ close(sock);
+ return ret;
+}
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 30c776375118..c60122d3ea85 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -106,6 +106,8 @@ static const char *libbpf_strerror_table[NR_ERRNO] = {
[ERRCODE_OFFSET(PROG2BIG)] = "Program too b
[PATCH bpf-next v8 3/5] libbpf: add error reporting in XDP
Parse netlink ext attribute to get the error message returned by
the card. Code is partially take from libnl.
We add netlink.h to the uapi include of tools. And we need to
avoid include of userspace netlink header to have a successful
build of sample so nlattr.h has a define to avoid
the inclusion. Using a direct define could have been an issue
as NLMSGERR_ATTR_MAX can change in the future.
We also define SOL_NETLINK if not defined to avoid to have to
copy socket.h for a fixed value.
Signed-off-by: Eric Leblond <e...@regit.org>
Acked-by: Alexei Starovoitov <a...@kernel.org>
---
samples/bpf/Makefile | 2 +-
tools/lib/bpf/Build| 2 +-
tools/lib/bpf/bpf.c| 11 +++
tools/lib/bpf/nlattr.c | 187 +
tools/lib/bpf/nlattr.h | 72 +++
5 files changed, 272 insertions(+), 2 deletions(-)
create mode 100644 tools/lib/bpf/nlattr.c
create mode 100644 tools/lib/bpf/nlattr.h
diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
index 64335bb94f9f..ec3fc8d88e87 100644
--- a/samples/bpf/Makefile
+++ b/samples/bpf/Makefile
@@ -45,7 +45,7 @@ hostprogs-y += xdp_rxq_info
hostprogs-y += syscall_tp
# Libbpf dependencies
-LIBBPF := ../../tools/lib/bpf/bpf.o
+LIBBPF := ../../tools/lib/bpf/bpf.o ../../tools/lib/bpf/nlattr.o
CGROUP_HELPERS := ../../tools/testing/selftests/bpf/cgroup_helpers.o
test_lru_dist-objs := test_lru_dist.o $(LIBBPF)
diff --git a/tools/lib/bpf/Build b/tools/lib/bpf/Build
index d8749756352d..64c679d67109 100644
--- a/tools/lib/bpf/Build
+++ b/tools/lib/bpf/Build
@@ -1 +1 @@
-libbpf-y := libbpf.o bpf.o
+libbpf-y := libbpf.o bpf.o nlattr.o
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index bf2772566240..9c88f6e4156d 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -32,6 +32,10 @@
#include
#include
+#ifndef SOL_NETLINK
+#define SOL_NETLINK 270
+#endif
+
/*
* When building perf, unistd.h is overridden. __NR_bpf is
* required to be defined explicitly.
@@ -436,6 +440,7 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
struct nlmsghdr *nh;
struct nlmsgerr *err;
socklen_t addrlen;
+ int one = 1;
memset(, 0, sizeof(sa));
sa.nl_family = AF_NETLINK;
@@ -445,6 +450,11 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
return -errno;
}
+ if (setsockopt(sock, SOL_NETLINK, NETLINK_EXT_ACK,
+ , sizeof(one)) < 0) {
+ fprintf(stderr, "Netlink error reporting not supported\n");
+ }
+
if (bind(sock, (struct sockaddr *), sizeof(sa)) < 0) {
ret = -errno;
goto cleanup;
@@ -521,6 +531,7 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
if (!err->error)
continue;
ret = err->error;
+ nla_dump_errormsg(nh);
goto cleanup;
case NLMSG_DONE:
break;
diff --git a/tools/lib/bpf/nlattr.c b/tools/lib/bpf/nlattr.c
new file mode 100644
index ..4719434278b2
--- /dev/null
+++ b/tools/lib/bpf/nlattr.c
@@ -0,0 +1,187 @@
+// SPDX-License-Identifier: LGPL-2.1
+
+/*
+ * NETLINK Netlink attributes
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation version 2.1
+ * of the License.
+ *
+ * Copyright (c) 2003-2013 Thomas Graf <tg...@suug.ch>
+ */
+
+#include
+#include "nlattr.h"
+#include
+#include
+#include
+
+static uint16_t nla_attr_minlen[NLA_TYPE_MAX+1] = {
+ [NLA_U8]= sizeof(uint8_t),
+ [NLA_U16] = sizeof(uint16_t),
+ [NLA_U32] = sizeof(uint32_t),
+ [NLA_U64] = sizeof(uint64_t),
+ [NLA_STRING]= 1,
+ [NLA_FLAG] = 0,
+};
+
+static int nla_len(const struct nlattr *nla)
+{
+ return nla->nla_len - NLA_HDRLEN;
+}
+
+static struct nlattr *nla_next(const struct nlattr *nla, int *remaining)
+{
+ int totlen = NLA_ALIGN(nla->nla_len);
+
+ *remaining -= totlen;
+ return (struct nlattr *) ((char *) nla + totlen);
+}
+
+static int nla_ok(const struct nlattr *nla, int remaining)
+{
+ return remaining >= sizeof(*nla) &&
+ nla->nla_len >= sizeof(*nla) &&
+ nla->nla_len <= remaining;
+}
+
+static void *nla_data(const struct nlattr *nla)
+{
+ return (char *) nla + NLA_HDRLEN;
+}
+
+static int nla_type(const struct nlattr *nla)
+{
+ return nla->nla_type & NLA_TYPE_MASK;
+}
+
+static int validate_nla(struct nlattr *nla, int maxtype,
+ struct nla_policy *policy)
+{
+ struct nla_policy *pt;
+ unsigned int minlen = 0;
+ int type = nla_type(
[PATCH bpf-next v8 3/5] libbpf: add error reporting in XDP
Parse netlink ext attribute to get the error message returned by
the card. Code is partially take from libnl.
We add netlink.h to the uapi include of tools. And we need to
avoid include of userspace netlink header to have a successful
build of sample so nlattr.h has a define to avoid
the inclusion. Using a direct define could have been an issue
as NLMSGERR_ATTR_MAX can change in the future.
We also define SOL_NETLINK if not defined to avoid to have to
copy socket.h for a fixed value.
Signed-off-by: Eric Leblond
Acked-by: Alexei Starovoitov
---
samples/bpf/Makefile | 2 +-
tools/lib/bpf/Build| 2 +-
tools/lib/bpf/bpf.c| 11 +++
tools/lib/bpf/nlattr.c | 187 +
tools/lib/bpf/nlattr.h | 72 +++
5 files changed, 272 insertions(+), 2 deletions(-)
create mode 100644 tools/lib/bpf/nlattr.c
create mode 100644 tools/lib/bpf/nlattr.h
diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
index 64335bb94f9f..ec3fc8d88e87 100644
--- a/samples/bpf/Makefile
+++ b/samples/bpf/Makefile
@@ -45,7 +45,7 @@ hostprogs-y += xdp_rxq_info
hostprogs-y += syscall_tp
# Libbpf dependencies
-LIBBPF := ../../tools/lib/bpf/bpf.o
+LIBBPF := ../../tools/lib/bpf/bpf.o ../../tools/lib/bpf/nlattr.o
CGROUP_HELPERS := ../../tools/testing/selftests/bpf/cgroup_helpers.o
test_lru_dist-objs := test_lru_dist.o $(LIBBPF)
diff --git a/tools/lib/bpf/Build b/tools/lib/bpf/Build
index d8749756352d..64c679d67109 100644
--- a/tools/lib/bpf/Build
+++ b/tools/lib/bpf/Build
@@ -1 +1 @@
-libbpf-y := libbpf.o bpf.o
+libbpf-y := libbpf.o bpf.o nlattr.o
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index bf2772566240..9c88f6e4156d 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -32,6 +32,10 @@
#include
#include
+#ifndef SOL_NETLINK
+#define SOL_NETLINK 270
+#endif
+
/*
* When building perf, unistd.h is overridden. __NR_bpf is
* required to be defined explicitly.
@@ -436,6 +440,7 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
struct nlmsghdr *nh;
struct nlmsgerr *err;
socklen_t addrlen;
+ int one = 1;
memset(, 0, sizeof(sa));
sa.nl_family = AF_NETLINK;
@@ -445,6 +450,11 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
return -errno;
}
+ if (setsockopt(sock, SOL_NETLINK, NETLINK_EXT_ACK,
+ , sizeof(one)) < 0) {
+ fprintf(stderr, "Netlink error reporting not supported\n");
+ }
+
if (bind(sock, (struct sockaddr *), sizeof(sa)) < 0) {
ret = -errno;
goto cleanup;
@@ -521,6 +531,7 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
if (!err->error)
continue;
ret = err->error;
+ nla_dump_errormsg(nh);
goto cleanup;
case NLMSG_DONE:
break;
diff --git a/tools/lib/bpf/nlattr.c b/tools/lib/bpf/nlattr.c
new file mode 100644
index ..4719434278b2
--- /dev/null
+++ b/tools/lib/bpf/nlattr.c
@@ -0,0 +1,187 @@
+// SPDX-License-Identifier: LGPL-2.1
+
+/*
+ * NETLINK Netlink attributes
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation version 2.1
+ * of the License.
+ *
+ * Copyright (c) 2003-2013 Thomas Graf
+ */
+
+#include
+#include "nlattr.h"
+#include
+#include
+#include
+
+static uint16_t nla_attr_minlen[NLA_TYPE_MAX+1] = {
+ [NLA_U8]= sizeof(uint8_t),
+ [NLA_U16] = sizeof(uint16_t),
+ [NLA_U32] = sizeof(uint32_t),
+ [NLA_U64] = sizeof(uint64_t),
+ [NLA_STRING]= 1,
+ [NLA_FLAG] = 0,
+};
+
+static int nla_len(const struct nlattr *nla)
+{
+ return nla->nla_len - NLA_HDRLEN;
+}
+
+static struct nlattr *nla_next(const struct nlattr *nla, int *remaining)
+{
+ int totlen = NLA_ALIGN(nla->nla_len);
+
+ *remaining -= totlen;
+ return (struct nlattr *) ((char *) nla + totlen);
+}
+
+static int nla_ok(const struct nlattr *nla, int remaining)
+{
+ return remaining >= sizeof(*nla) &&
+ nla->nla_len >= sizeof(*nla) &&
+ nla->nla_len <= remaining;
+}
+
+static void *nla_data(const struct nlattr *nla)
+{
+ return (char *) nla + NLA_HDRLEN;
+}
+
+static int nla_type(const struct nlattr *nla)
+{
+ return nla->nla_type & NLA_TYPE_MASK;
+}
+
+static int validate_nla(struct nlattr *nla, int maxtype,
+ struct nla_policy *policy)
+{
+ struct nla_policy *pt;
+ unsigned int minlen = 0;
+ int type = nla_type(nla);
+
+ if (type < 0 || type > maxtype)
+ return 0;
+
+
[PATCH bpf-next v8 5/5] samples/bpf: use bpf_set_link_xdp_fd
Use bpf_set_link_xdp_fd instead of set_link_xdp_fd to remove some
code duplication and benefit of netlink ext ack errors message.
Signed-off-by: Eric Leblond <e...@regit.org>
---
samples/bpf/bpf_load.c | 102
samples/bpf/bpf_load.h | 2 +-
samples/bpf/xdp1_user.c | 4 +-
samples/bpf/xdp_redirect_cpu_user.c | 6 +--
samples/bpf/xdp_redirect_map_user.c | 8 +--
samples/bpf/xdp_redirect_user.c | 8 +--
samples/bpf/xdp_router_ipv4_user.c | 10 ++--
samples/bpf/xdp_rxq_info_user.c | 4 +-
samples/bpf/xdp_tx_iptunnel_user.c | 6 +--
9 files changed, 24 insertions(+), 126 deletions(-)
diff --git a/samples/bpf/bpf_load.c b/samples/bpf/bpf_load.c
index 242631aa4ea2..69806d74fa53 100644
--- a/samples/bpf/bpf_load.c
+++ b/samples/bpf/bpf_load.c
@@ -695,105 +695,3 @@ struct ksym *ksym_search(long key)
return [0];
}
-int set_link_xdp_fd(int ifindex, int fd, __u32 flags)
-{
- struct sockaddr_nl sa;
- int sock, seq = 0, len, ret = -1;
- char buf[4096];
- struct nlattr *nla, *nla_xdp;
- struct {
- struct nlmsghdr nh;
- struct ifinfomsg ifinfo;
- char attrbuf[64];
- } req;
- struct nlmsghdr *nh;
- struct nlmsgerr *err;
-
- memset(, 0, sizeof(sa));
- sa.nl_family = AF_NETLINK;
-
- sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
- if (sock < 0) {
- printf("open netlink socket: %s\n", strerror(errno));
- return -1;
- }
-
- if (bind(sock, (struct sockaddr *), sizeof(sa)) < 0) {
- printf("bind to netlink: %s\n", strerror(errno));
- goto cleanup;
- }
-
- memset(, 0, sizeof(req));
- req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
- req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
- req.nh.nlmsg_type = RTM_SETLINK;
- req.nh.nlmsg_pid = 0;
- req.nh.nlmsg_seq = ++seq;
- req.ifinfo.ifi_family = AF_UNSPEC;
- req.ifinfo.ifi_index = ifindex;
-
- /* started nested attribute for XDP */
- nla = (struct nlattr *)(((char *))
- + NLMSG_ALIGN(req.nh.nlmsg_len));
- nla->nla_type = NLA_F_NESTED | 43/*IFLA_XDP*/;
- nla->nla_len = NLA_HDRLEN;
-
- /* add XDP fd */
- nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
- nla_xdp->nla_type = 1/*IFLA_XDP_FD*/;
- nla_xdp->nla_len = NLA_HDRLEN + sizeof(int);
- memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(fd));
- nla->nla_len += nla_xdp->nla_len;
-
- /* if user passed in any flags, add those too */
- if (flags) {
- nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
- nla_xdp->nla_type = 3/*IFLA_XDP_FLAGS*/;
- nla_xdp->nla_len = NLA_HDRLEN + sizeof(flags);
- memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(flags));
- nla->nla_len += nla_xdp->nla_len;
- }
-
- req.nh.nlmsg_len += NLA_ALIGN(nla->nla_len);
-
- if (send(sock, , req.nh.nlmsg_len, 0) < 0) {
- printf("send to netlink: %s\n", strerror(errno));
- goto cleanup;
- }
-
- len = recv(sock, buf, sizeof(buf), 0);
- if (len < 0) {
- printf("recv from netlink: %s\n", strerror(errno));
- goto cleanup;
- }
-
- for (nh = (struct nlmsghdr *)buf; NLMSG_OK(nh, len);
-nh = NLMSG_NEXT(nh, len)) {
- if (nh->nlmsg_pid != getpid()) {
- printf("Wrong pid %d, expected %d\n",
- nh->nlmsg_pid, getpid());
- goto cleanup;
- }
- if (nh->nlmsg_seq != seq) {
- printf("Wrong seq %d, expected %d\n",
- nh->nlmsg_seq, seq);
- goto cleanup;
- }
- switch (nh->nlmsg_type) {
- case NLMSG_ERROR:
- err = (struct nlmsgerr *)NLMSG_DATA(nh);
- if (!err->error)
- continue;
- printf("nlmsg error %s\n", strerror(-err->error));
- goto cleanup;
- case NLMSG_DONE:
- break;
- }
- }
-
- ret = 0;
-
-cleanup:
- close(sock);
- return ret;
-}
diff --git a/samples/bpf/bpf_load.h b/samples/bpf/bpf_load.h
index 7d57a4248893..453c200b389b 100644
--- a/samples/bpf/bpf_load.h
+++ b/samples/bpf/bpf_load.h
@@ -61,5 +61,5 @@ struct ksym {
int load_kallsyms(void);
struct ksym *ksym_search(long key);
-int set_link_xdp_fd(int ifindex, int fd, __u32 flags);
+int bpf_set_link_xdp_
[PATCH bpf-next v8 5/5] samples/bpf: use bpf_set_link_xdp_fd
Use bpf_set_link_xdp_fd instead of set_link_xdp_fd to remove some
code duplication and benefit of netlink ext ack errors message.
Signed-off-by: Eric Leblond
---
samples/bpf/bpf_load.c | 102
samples/bpf/bpf_load.h | 2 +-
samples/bpf/xdp1_user.c | 4 +-
samples/bpf/xdp_redirect_cpu_user.c | 6 +--
samples/bpf/xdp_redirect_map_user.c | 8 +--
samples/bpf/xdp_redirect_user.c | 8 +--
samples/bpf/xdp_router_ipv4_user.c | 10 ++--
samples/bpf/xdp_rxq_info_user.c | 4 +-
samples/bpf/xdp_tx_iptunnel_user.c | 6 +--
9 files changed, 24 insertions(+), 126 deletions(-)
diff --git a/samples/bpf/bpf_load.c b/samples/bpf/bpf_load.c
index 242631aa4ea2..69806d74fa53 100644
--- a/samples/bpf/bpf_load.c
+++ b/samples/bpf/bpf_load.c
@@ -695,105 +695,3 @@ struct ksym *ksym_search(long key)
return [0];
}
-int set_link_xdp_fd(int ifindex, int fd, __u32 flags)
-{
- struct sockaddr_nl sa;
- int sock, seq = 0, len, ret = -1;
- char buf[4096];
- struct nlattr *nla, *nla_xdp;
- struct {
- struct nlmsghdr nh;
- struct ifinfomsg ifinfo;
- char attrbuf[64];
- } req;
- struct nlmsghdr *nh;
- struct nlmsgerr *err;
-
- memset(, 0, sizeof(sa));
- sa.nl_family = AF_NETLINK;
-
- sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
- if (sock < 0) {
- printf("open netlink socket: %s\n", strerror(errno));
- return -1;
- }
-
- if (bind(sock, (struct sockaddr *), sizeof(sa)) < 0) {
- printf("bind to netlink: %s\n", strerror(errno));
- goto cleanup;
- }
-
- memset(, 0, sizeof(req));
- req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
- req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
- req.nh.nlmsg_type = RTM_SETLINK;
- req.nh.nlmsg_pid = 0;
- req.nh.nlmsg_seq = ++seq;
- req.ifinfo.ifi_family = AF_UNSPEC;
- req.ifinfo.ifi_index = ifindex;
-
- /* started nested attribute for XDP */
- nla = (struct nlattr *)(((char *))
- + NLMSG_ALIGN(req.nh.nlmsg_len));
- nla->nla_type = NLA_F_NESTED | 43/*IFLA_XDP*/;
- nla->nla_len = NLA_HDRLEN;
-
- /* add XDP fd */
- nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
- nla_xdp->nla_type = 1/*IFLA_XDP_FD*/;
- nla_xdp->nla_len = NLA_HDRLEN + sizeof(int);
- memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(fd));
- nla->nla_len += nla_xdp->nla_len;
-
- /* if user passed in any flags, add those too */
- if (flags) {
- nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
- nla_xdp->nla_type = 3/*IFLA_XDP_FLAGS*/;
- nla_xdp->nla_len = NLA_HDRLEN + sizeof(flags);
- memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(flags));
- nla->nla_len += nla_xdp->nla_len;
- }
-
- req.nh.nlmsg_len += NLA_ALIGN(nla->nla_len);
-
- if (send(sock, , req.nh.nlmsg_len, 0) < 0) {
- printf("send to netlink: %s\n", strerror(errno));
- goto cleanup;
- }
-
- len = recv(sock, buf, sizeof(buf), 0);
- if (len < 0) {
- printf("recv from netlink: %s\n", strerror(errno));
- goto cleanup;
- }
-
- for (nh = (struct nlmsghdr *)buf; NLMSG_OK(nh, len);
-nh = NLMSG_NEXT(nh, len)) {
- if (nh->nlmsg_pid != getpid()) {
- printf("Wrong pid %d, expected %d\n",
- nh->nlmsg_pid, getpid());
- goto cleanup;
- }
- if (nh->nlmsg_seq != seq) {
- printf("Wrong seq %d, expected %d\n",
- nh->nlmsg_seq, seq);
- goto cleanup;
- }
- switch (nh->nlmsg_type) {
- case NLMSG_ERROR:
- err = (struct nlmsgerr *)NLMSG_DATA(nh);
- if (!err->error)
- continue;
- printf("nlmsg error %s\n", strerror(-err->error));
- goto cleanup;
- case NLMSG_DONE:
- break;
- }
- }
-
- ret = 0;
-
-cleanup:
- close(sock);
- return ret;
-}
diff --git a/samples/bpf/bpf_load.h b/samples/bpf/bpf_load.h
index 7d57a4248893..453c200b389b 100644
--- a/samples/bpf/bpf_load.h
+++ b/samples/bpf/bpf_load.h
@@ -61,5 +61,5 @@ struct ksym {
int load_kallsyms(void);
struct ksym *ksym_search(long key);
-int set_link_xdp_fd(int ifindex, int fd, __u32 flags);
+int bpf_set_link_xdp_fd(int ifindex, int fd,
[PATCH bpf-next v8 1/5] tools: add netlink.h and if_link.h in tools uapi
The headers are necessary for libbpf compilation on system with older
version of the headers.
Signed-off-by: Eric Leblond <e...@regit.org>
---
tools/include/uapi/linux/if_link.h | 943 +
tools/include/uapi/linux/netlink.h | 251 ++
tools/lib/bpf/Makefile | 6 +
3 files changed, 1200 insertions(+)
create mode 100644 tools/include/uapi/linux/if_link.h
create mode 100644 tools/include/uapi/linux/netlink.h
diff --git a/tools/include/uapi/linux/if_link.h
b/tools/include/uapi/linux/if_link.h
new file mode 100644
index ..8616131e2c61
--- /dev/null
+++ b/tools/include/uapi/linux/if_link.h
@@ -0,0 +1,943 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef _UAPI_LINUX_IF_LINK_H
+#define _UAPI_LINUX_IF_LINK_H
+
+#include
+#include
+
+/* This struct should be in sync with struct rtnl_link_stats64 */
+struct rtnl_link_stats {
+ __u32 rx_packets; /* total packets received */
+ __u32 tx_packets; /* total packets transmitted*/
+ __u32 rx_bytes; /* total bytes received */
+ __u32 tx_bytes; /* total bytes transmitted */
+ __u32 rx_errors; /* bad packets received */
+ __u32 tx_errors; /* packet transmit problems */
+ __u32 rx_dropped; /* no space in linux buffers*/
+ __u32 tx_dropped; /* no space available in linux */
+ __u32 multicast; /* multicast packets received */
+ __u32 collisions;
+
+ /* detailed rx_errors: */
+ __u32 rx_length_errors;
+ __u32 rx_over_errors; /* receiver ring buff overflow */
+ __u32 rx_crc_errors; /* recved pkt with crc error*/
+ __u32 rx_frame_errors;/* recv'd frame alignment error */
+ __u32 rx_fifo_errors; /* recv'r fifo overrun */
+ __u32 rx_missed_errors; /* receiver missed packet */
+
+ /* detailed tx_errors */
+ __u32 tx_aborted_errors;
+ __u32 tx_carrier_errors;
+ __u32 tx_fifo_errors;
+ __u32 tx_heartbeat_errors;
+ __u32 tx_window_errors;
+
+ /* for cslip etc */
+ __u32 rx_compressed;
+ __u32 tx_compressed;
+
+ __u32 rx_nohandler; /* dropped, no handler found*/
+};
+
+/* The main device statistics structure */
+struct rtnl_link_stats64 {
+ __u64 rx_packets; /* total packets received */
+ __u64 tx_packets; /* total packets transmitted*/
+ __u64 rx_bytes; /* total bytes received */
+ __u64 tx_bytes; /* total bytes transmitted */
+ __u64 rx_errors; /* bad packets received */
+ __u64 tx_errors; /* packet transmit problems */
+ __u64 rx_dropped; /* no space in linux buffers*/
+ __u64 tx_dropped; /* no space available in linux */
+ __u64 multicast; /* multicast packets received */
+ __u64 collisions;
+
+ /* detailed rx_errors: */
+ __u64 rx_length_errors;
+ __u64 rx_over_errors; /* receiver ring buff overflow */
+ __u64 rx_crc_errors; /* recved pkt with crc error*/
+ __u64 rx_frame_errors;/* recv'd frame alignment error */
+ __u64 rx_fifo_errors; /* recv'r fifo overrun */
+ __u64 rx_missed_errors; /* receiver missed packet */
+
+ /* detailed tx_errors */
+ __u64 tx_aborted_errors;
+ __u64 tx_carrier_errors;
+ __u64 tx_fifo_errors;
+ __u64 tx_heartbeat_errors;
+ __u64 tx_window_errors;
+
+ /* for cslip etc */
+ __u64 rx_compressed;
+ __u64 tx_compressed;
+
+ __u64 rx_nohandler; /* dropped, no handler found*/
+};
+
+/* The struct should be in sync with struct ifmap */
+struct rtnl_link_ifmap {
+ __u64 mem_start;
+ __u64 mem_end;
+ __u64 base_addr;
+ __u16 irq;
+ __u8dma;
+ __u8port;
+};
+
+/*
+ * IFLA_AF_SPEC
+ * Contains nested attributes for address family specific attributes.
+ * Each address family may create a attribute with the address family
+ * number as type and create its own attribute structure in it.
+ *
+ * Example:
+ * [IFLA_AF_SPEC] = {
+ * [AF_INET] = {
+ * [IFLA_INET_CONF] = ...,
+ * },
+ * [AF_INET6] = {
+ * [IFLA_INET6_FLAGS] = ...,
+ * [IFLA_INET6_CONF] = ...,
+ * }
+ * }
+ */
+
+enum {
+ IFLA_UNSPEC,
+ IFLA_ADDRESS,
+ IFLA_BROADCAST,
+ IFLA_IFNAME,
+ IFLA_MTU,
+ IFLA_LINK,
+ IFLA_QDISC,
+ IFLA_STATS,
+ IFLA_COST,
+#define IFLA_COST IFL
[PATCH bpf-next v8 1/5] tools: add netlink.h and if_link.h in tools uapi
The headers are necessary for libbpf compilation on system with older
version of the headers.
Signed-off-by: Eric Leblond
---
tools/include/uapi/linux/if_link.h | 943 +
tools/include/uapi/linux/netlink.h | 251 ++
tools/lib/bpf/Makefile | 6 +
3 files changed, 1200 insertions(+)
create mode 100644 tools/include/uapi/linux/if_link.h
create mode 100644 tools/include/uapi/linux/netlink.h
diff --git a/tools/include/uapi/linux/if_link.h
b/tools/include/uapi/linux/if_link.h
new file mode 100644
index ..8616131e2c61
--- /dev/null
+++ b/tools/include/uapi/linux/if_link.h
@@ -0,0 +1,943 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef _UAPI_LINUX_IF_LINK_H
+#define _UAPI_LINUX_IF_LINK_H
+
+#include
+#include
+
+/* This struct should be in sync with struct rtnl_link_stats64 */
+struct rtnl_link_stats {
+ __u32 rx_packets; /* total packets received */
+ __u32 tx_packets; /* total packets transmitted*/
+ __u32 rx_bytes; /* total bytes received */
+ __u32 tx_bytes; /* total bytes transmitted */
+ __u32 rx_errors; /* bad packets received */
+ __u32 tx_errors; /* packet transmit problems */
+ __u32 rx_dropped; /* no space in linux buffers*/
+ __u32 tx_dropped; /* no space available in linux */
+ __u32 multicast; /* multicast packets received */
+ __u32 collisions;
+
+ /* detailed rx_errors: */
+ __u32 rx_length_errors;
+ __u32 rx_over_errors; /* receiver ring buff overflow */
+ __u32 rx_crc_errors; /* recved pkt with crc error*/
+ __u32 rx_frame_errors;/* recv'd frame alignment error */
+ __u32 rx_fifo_errors; /* recv'r fifo overrun */
+ __u32 rx_missed_errors; /* receiver missed packet */
+
+ /* detailed tx_errors */
+ __u32 tx_aborted_errors;
+ __u32 tx_carrier_errors;
+ __u32 tx_fifo_errors;
+ __u32 tx_heartbeat_errors;
+ __u32 tx_window_errors;
+
+ /* for cslip etc */
+ __u32 rx_compressed;
+ __u32 tx_compressed;
+
+ __u32 rx_nohandler; /* dropped, no handler found*/
+};
+
+/* The main device statistics structure */
+struct rtnl_link_stats64 {
+ __u64 rx_packets; /* total packets received */
+ __u64 tx_packets; /* total packets transmitted*/
+ __u64 rx_bytes; /* total bytes received */
+ __u64 tx_bytes; /* total bytes transmitted */
+ __u64 rx_errors; /* bad packets received */
+ __u64 tx_errors; /* packet transmit problems */
+ __u64 rx_dropped; /* no space in linux buffers*/
+ __u64 tx_dropped; /* no space available in linux */
+ __u64 multicast; /* multicast packets received */
+ __u64 collisions;
+
+ /* detailed rx_errors: */
+ __u64 rx_length_errors;
+ __u64 rx_over_errors; /* receiver ring buff overflow */
+ __u64 rx_crc_errors; /* recved pkt with crc error*/
+ __u64 rx_frame_errors;/* recv'd frame alignment error */
+ __u64 rx_fifo_errors; /* recv'r fifo overrun */
+ __u64 rx_missed_errors; /* receiver missed packet */
+
+ /* detailed tx_errors */
+ __u64 tx_aborted_errors;
+ __u64 tx_carrier_errors;
+ __u64 tx_fifo_errors;
+ __u64 tx_heartbeat_errors;
+ __u64 tx_window_errors;
+
+ /* for cslip etc */
+ __u64 rx_compressed;
+ __u64 tx_compressed;
+
+ __u64 rx_nohandler; /* dropped, no handler found*/
+};
+
+/* The struct should be in sync with struct ifmap */
+struct rtnl_link_ifmap {
+ __u64 mem_start;
+ __u64 mem_end;
+ __u64 base_addr;
+ __u16 irq;
+ __u8dma;
+ __u8port;
+};
+
+/*
+ * IFLA_AF_SPEC
+ * Contains nested attributes for address family specific attributes.
+ * Each address family may create a attribute with the address family
+ * number as type and create its own attribute structure in it.
+ *
+ * Example:
+ * [IFLA_AF_SPEC] = {
+ * [AF_INET] = {
+ * [IFLA_INET_CONF] = ...,
+ * },
+ * [AF_INET6] = {
+ * [IFLA_INET6_FLAGS] = ...,
+ * [IFLA_INET6_CONF] = ...,
+ * }
+ * }
+ */
+
+enum {
+ IFLA_UNSPEC,
+ IFLA_ADDRESS,
+ IFLA_BROADCAST,
+ IFLA_IFNAME,
+ IFLA_MTU,
+ IFLA_LINK,
+ IFLA_QDISC,
+ IFLA_STATS,
+ IFLA_COST,
+#define IFLA_COST IFLA_COST
[PATCH bpf-next v8 0/5] libbpf: add XDP binding support
Hello Daniel, No problem with the delay in the answer. I'm doing far worse. Here is an updated version: - add if_link.h in uapi and remove the definition - fix a commit message - remove uapi from a include Best Regards, -- Eric
[PATCH bpf-next v8 0/5] libbpf: add XDP binding support
Hello Daniel, No problem with the delay in the answer. I'm doing far worse. Here is an updated version: - add if_link.h in uapi and remove the definition - fix a commit message - remove uapi from a include Best Regards, -- Eric
Re: [PATCH bpf-next v7 3/5] libbpf: add error reporting in XDP
Hi, On Sat, 2018-01-27 at 02:28 +0100, Daniel Borkmann wrote: > On 01/25/2018 01:05 AM, Eric Leblond wrote: > > Parse netlink ext attribute to get the error message returned by > > the card. Code is partially take from libnl. > > > > We add netlink.h to the uapi include of tools. And we need to > > avoid include of userspace netlink header to have a successful > > build of sample so nlattr.h has a define to avoid > > the inclusion. Using a direct define could have been an issue > > as NLMSGERR_ATTR_MAX can change in the future. > > > > We also define SOL_NETLINK if not defined to avoid to have to > > copy socket.h for a fixed value. > > > > Signed-off-by: Eric Leblond <e...@regit.org> > > Acked-by: Alexei Starovoitov <a...@kernel.org> > > > > remote rtne > > > > Signed-off-by: Eric Leblond <e...@regit.org> > > Some leftover artifact from squashing commits? Outch > > samples/bpf/Makefile | 2 +- > > tools/lib/bpf/Build| 2 +- > > tools/lib/bpf/bpf.c| 13 +++- > > tools/lib/bpf/nlattr.c | 187 > > + > > tools/lib/bpf/nlattr.h | 72 +++ > > 5 files changed, 273 insertions(+), 3 deletions(-) > > create mode 100644 tools/lib/bpf/nlattr.c > > create mode 100644 tools/lib/bpf/nlattr.h > > > > diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile > > index 7f61a3d57fa7..5c4cd3745282 100644 > > --- a/samples/bpf/Makefile > > +++ b/samples/bpf/Makefile > > @@ -45,7 +45,7 @@ hostprogs-y += xdp_rxq_info > > hostprogs-y += syscall_tp > > > > # Libbpf dependencies > > -LIBBPF := ../../tools/lib/bpf/bpf.o > > +LIBBPF := ../../tools/lib/bpf/bpf.o ../../tools/lib/bpf/nlattr.o > > CGROUP_HELPERS := > > ../../tools/testing/selftests/bpf/cgroup_helpers.o > > > > test_lru_dist-objs := test_lru_dist.o $(LIBBPF) > > diff --git a/tools/lib/bpf/Build b/tools/lib/bpf/Build > > index d8749756352d..64c679d67109 100644 > > --- a/tools/lib/bpf/Build > > +++ b/tools/lib/bpf/Build > > @@ -1 +1 @@ > > -libbpf-y := libbpf.o bpf.o > > +libbpf-y := libbpf.o bpf.o nlattr.o > > diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c > > index 749a447ec9ed..765fd95b0657 100644 > > --- a/tools/lib/bpf/bpf.c > > +++ b/tools/lib/bpf/bpf.c > > @@ -27,7 +27,7 @@ > > #include "bpf.h" > > #include "libbpf.h" > > #include "nlattr.h" > > -#include > > +#include > > Okay, so here it's put back from prior added uapi/linux/rtnetlink.h > into linux/rtnetlink.h. Could you add this properly in the first > commit rather than relative adjustment/fix within the same set? Yes, sure. > > #include > > #include > > > > @@ -37,6 +37,10 @@ > > #define IFLA_XDP_FLAGS 3 > > #endif > > > > +#ifndef SOL_NETLINK > > +#define SOL_NETLINK 270 > > +#endif > > This would need include/linux/socket.h into tools/ include infra > as well, no? Yes, and I fear a lot of dependencies. ++ -- Eric Leblond <e...@regit.org> Blog: https://home.regit.org/
Re: [PATCH bpf-next v7 3/5] libbpf: add error reporting in XDP
Hi, On Sat, 2018-01-27 at 02:28 +0100, Daniel Borkmann wrote: > On 01/25/2018 01:05 AM, Eric Leblond wrote: > > Parse netlink ext attribute to get the error message returned by > > the card. Code is partially take from libnl. > > > > We add netlink.h to the uapi include of tools. And we need to > > avoid include of userspace netlink header to have a successful > > build of sample so nlattr.h has a define to avoid > > the inclusion. Using a direct define could have been an issue > > as NLMSGERR_ATTR_MAX can change in the future. > > > > We also define SOL_NETLINK if not defined to avoid to have to > > copy socket.h for a fixed value. > > > > Signed-off-by: Eric Leblond > > Acked-by: Alexei Starovoitov > > > > remote rtne > > > > Signed-off-by: Eric Leblond > > Some leftover artifact from squashing commits? Outch > > samples/bpf/Makefile | 2 +- > > tools/lib/bpf/Build| 2 +- > > tools/lib/bpf/bpf.c| 13 +++- > > tools/lib/bpf/nlattr.c | 187 > > + > > tools/lib/bpf/nlattr.h | 72 +++ > > 5 files changed, 273 insertions(+), 3 deletions(-) > > create mode 100644 tools/lib/bpf/nlattr.c > > create mode 100644 tools/lib/bpf/nlattr.h > > > > diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile > > index 7f61a3d57fa7..5c4cd3745282 100644 > > --- a/samples/bpf/Makefile > > +++ b/samples/bpf/Makefile > > @@ -45,7 +45,7 @@ hostprogs-y += xdp_rxq_info > > hostprogs-y += syscall_tp > > > > # Libbpf dependencies > > -LIBBPF := ../../tools/lib/bpf/bpf.o > > +LIBBPF := ../../tools/lib/bpf/bpf.o ../../tools/lib/bpf/nlattr.o > > CGROUP_HELPERS := > > ../../tools/testing/selftests/bpf/cgroup_helpers.o > > > > test_lru_dist-objs := test_lru_dist.o $(LIBBPF) > > diff --git a/tools/lib/bpf/Build b/tools/lib/bpf/Build > > index d8749756352d..64c679d67109 100644 > > --- a/tools/lib/bpf/Build > > +++ b/tools/lib/bpf/Build > > @@ -1 +1 @@ > > -libbpf-y := libbpf.o bpf.o > > +libbpf-y := libbpf.o bpf.o nlattr.o > > diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c > > index 749a447ec9ed..765fd95b0657 100644 > > --- a/tools/lib/bpf/bpf.c > > +++ b/tools/lib/bpf/bpf.c > > @@ -27,7 +27,7 @@ > > #include "bpf.h" > > #include "libbpf.h" > > #include "nlattr.h" > > -#include > > +#include > > Okay, so here it's put back from prior added uapi/linux/rtnetlink.h > into linux/rtnetlink.h. Could you add this properly in the first > commit rather than relative adjustment/fix within the same set? Yes, sure. > > #include > > #include > > > > @@ -37,6 +37,10 @@ > > #define IFLA_XDP_FLAGS 3 > > #endif > > > > +#ifndef SOL_NETLINK > > +#define SOL_NETLINK 270 > > +#endif > > This would need include/linux/socket.h into tools/ include infra > as well, no? Yes, and I fear a lot of dependencies. ++ -- Eric Leblond Blog: https://home.regit.org/
Re: [PATCH bpf-next v7 2/5] libbpf: add function to setup XDP
Hi, On Sat, 2018-01-27 at 02:23 +0100, Daniel Borkmann wrote: > On 01/25/2018 01:05 AM, Eric Leblond wrote: > > Most of the code is taken from set_link_xdp_fd() in bpf_load.c and > > slightly modified to be library compliant. > > > > Signed-off-by: Eric Leblond <e...@regit.org> > > Acked-by: Alexei Starovoitov <a...@kernel.org> > > --- > > tools/lib/bpf/bpf.c| 127 > > + > > tools/lib/bpf/libbpf.c | 2 + > > tools/lib/bpf/libbpf.h | 4 ++ > > 3 files changed, 133 insertions(+) > > > > diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c > > index 5128677e4117..749a447ec9ed 100644 > > --- a/tools/lib/bpf/bpf.c > > +++ b/tools/lib/bpf/bpf.c > > @@ -25,6 +25,17 @@ > > #include > > #include > > #include "bpf.h" > > +#include "libbpf.h" > > +#include "nlattr.h" > > +#include > > Doesn't libbpf pull in already -I$(srctree)/tools/include/uapi? Seems > the > other headers don't need 'uapi/' path prefix. Right, it works without the uapi. > > > +#include > > +#include > > + > > +#ifndef IFLA_XDP_MAX > > +#define IFLA_XDP 43 > > +#define IFLA_XDP_FD1 > > +#define IFLA_XDP_FLAGS 3 > > +#endif > > Hm, given we pull in tools/include/uapi/linux/netlink.h, shouldn't we > also > get include/uapi/linux/if_link.h dependency in here, so above ifdef > workaround > can be avoided? This values are fixed so we risk nothing by keeping a definition if ever it is not available in system headers. But it is fine with me if you want me to add if_link.h to include/uapi/. BR, -- Eric Leblond <e...@regit.org> Blog: https://home.regit.org/
Re: [PATCH bpf-next v7 2/5] libbpf: add function to setup XDP
Hi, On Sat, 2018-01-27 at 02:23 +0100, Daniel Borkmann wrote: > On 01/25/2018 01:05 AM, Eric Leblond wrote: > > Most of the code is taken from set_link_xdp_fd() in bpf_load.c and > > slightly modified to be library compliant. > > > > Signed-off-by: Eric Leblond > > Acked-by: Alexei Starovoitov > > --- > > tools/lib/bpf/bpf.c| 127 > > + > > tools/lib/bpf/libbpf.c | 2 + > > tools/lib/bpf/libbpf.h | 4 ++ > > 3 files changed, 133 insertions(+) > > > > diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c > > index 5128677e4117..749a447ec9ed 100644 > > --- a/tools/lib/bpf/bpf.c > > +++ b/tools/lib/bpf/bpf.c > > @@ -25,6 +25,17 @@ > > #include > > #include > > #include "bpf.h" > > +#include "libbpf.h" > > +#include "nlattr.h" > > +#include > > Doesn't libbpf pull in already -I$(srctree)/tools/include/uapi? Seems > the > other headers don't need 'uapi/' path prefix. Right, it works without the uapi. > > > +#include > > +#include > > + > > +#ifndef IFLA_XDP_MAX > > +#define IFLA_XDP 43 > > +#define IFLA_XDP_FD1 > > +#define IFLA_XDP_FLAGS 3 > > +#endif > > Hm, given we pull in tools/include/uapi/linux/netlink.h, shouldn't we > also > get include/uapi/linux/if_link.h dependency in here, so above ifdef > workaround > can be avoided? This values are fixed so we risk nothing by keeping a definition if ever it is not available in system headers. But it is fine with me if you want me to add if_link.h to include/uapi/. BR, -- Eric Leblond Blog: https://home.regit.org/
[PATCH bpf-next v7 4/5] libbpf: add missing SPDX-License-Identifier
Signed-off-by: Eric Leblond <e...@regit.org> Acked-by: Alexei Starovoitov <a...@kernel.org> --- tools/lib/bpf/bpf.c| 2 ++ tools/lib/bpf/bpf.h| 2 ++ tools/lib/bpf/libbpf.c | 2 ++ tools/lib/bpf/libbpf.h | 2 ++ 4 files changed, 8 insertions(+) diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c index 765fd95b0657..e850d8365100 100644 --- a/tools/lib/bpf/bpf.c +++ b/tools/lib/bpf/bpf.c @@ -1,3 +1,5 @@ +// SPDX-License-Identifier: LGPL-2.1 + /* * common eBPF ELF operations. * diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h index 9f44c196931e..8d18fb73d7fb 100644 --- a/tools/lib/bpf/bpf.h +++ b/tools/lib/bpf/bpf.h @@ -1,3 +1,5 @@ +/* SPDX-License-Identifier: LGPL-2.1 */ + /* * common eBPF ELF operations. * diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index c60122d3ea85..71ddc481f349 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -1,3 +1,5 @@ +// SPDX-License-Identifier: LGPL-2.1 + /* * Common eBPF ELF object loading operations. * diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h index e42f96900318..f85906533cdd 100644 --- a/tools/lib/bpf/libbpf.h +++ b/tools/lib/bpf/libbpf.h @@ -1,3 +1,5 @@ +/* SPDX-License-Identifier: LGPL-2.1 */ + /* * Common eBPF ELF object loading operations. * -- 2.15.1
[PATCH bpf-next v7 4/5] libbpf: add missing SPDX-License-Identifier
Signed-off-by: Eric Leblond Acked-by: Alexei Starovoitov --- tools/lib/bpf/bpf.c| 2 ++ tools/lib/bpf/bpf.h| 2 ++ tools/lib/bpf/libbpf.c | 2 ++ tools/lib/bpf/libbpf.h | 2 ++ 4 files changed, 8 insertions(+) diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c index 765fd95b0657..e850d8365100 100644 --- a/tools/lib/bpf/bpf.c +++ b/tools/lib/bpf/bpf.c @@ -1,3 +1,5 @@ +// SPDX-License-Identifier: LGPL-2.1 + /* * common eBPF ELF operations. * diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h index 9f44c196931e..8d18fb73d7fb 100644 --- a/tools/lib/bpf/bpf.h +++ b/tools/lib/bpf/bpf.h @@ -1,3 +1,5 @@ +/* SPDX-License-Identifier: LGPL-2.1 */ + /* * common eBPF ELF operations. * diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index c60122d3ea85..71ddc481f349 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -1,3 +1,5 @@ +// SPDX-License-Identifier: LGPL-2.1 + /* * Common eBPF ELF object loading operations. * diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h index e42f96900318..f85906533cdd 100644 --- a/tools/lib/bpf/libbpf.h +++ b/tools/lib/bpf/libbpf.h @@ -1,3 +1,5 @@ +/* SPDX-License-Identifier: LGPL-2.1 */ + /* * Common eBPF ELF object loading operations. * -- 2.15.1
[PATCH bpf-next v7 3/5] libbpf: add error reporting in XDP
Parse netlink ext attribute to get the error message returned by
the card. Code is partially take from libnl.
We add netlink.h to the uapi include of tools. And we need to
avoid include of userspace netlink header to have a successful
build of sample so nlattr.h has a define to avoid
the inclusion. Using a direct define could have been an issue
as NLMSGERR_ATTR_MAX can change in the future.
We also define SOL_NETLINK if not defined to avoid to have to
copy socket.h for a fixed value.
Signed-off-by: Eric Leblond <e...@regit.org>
Acked-by: Alexei Starovoitov <a...@kernel.org>
remote rtne
Signed-off-by: Eric Leblond <e...@regit.org>
---
samples/bpf/Makefile | 2 +-
tools/lib/bpf/Build| 2 +-
tools/lib/bpf/bpf.c| 13 +++-
tools/lib/bpf/nlattr.c | 187 +
tools/lib/bpf/nlattr.h | 72 +++
5 files changed, 273 insertions(+), 3 deletions(-)
create mode 100644 tools/lib/bpf/nlattr.c
create mode 100644 tools/lib/bpf/nlattr.h
diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
index 7f61a3d57fa7..5c4cd3745282 100644
--- a/samples/bpf/Makefile
+++ b/samples/bpf/Makefile
@@ -45,7 +45,7 @@ hostprogs-y += xdp_rxq_info
hostprogs-y += syscall_tp
# Libbpf dependencies
-LIBBPF := ../../tools/lib/bpf/bpf.o
+LIBBPF := ../../tools/lib/bpf/bpf.o ../../tools/lib/bpf/nlattr.o
CGROUP_HELPERS := ../../tools/testing/selftests/bpf/cgroup_helpers.o
test_lru_dist-objs := test_lru_dist.o $(LIBBPF)
diff --git a/tools/lib/bpf/Build b/tools/lib/bpf/Build
index d8749756352d..64c679d67109 100644
--- a/tools/lib/bpf/Build
+++ b/tools/lib/bpf/Build
@@ -1 +1 @@
-libbpf-y := libbpf.o bpf.o
+libbpf-y := libbpf.o bpf.o nlattr.o
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index 749a447ec9ed..765fd95b0657 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -27,7 +27,7 @@
#include "bpf.h"
#include "libbpf.h"
#include "nlattr.h"
-#include
+#include
#include
#include
@@ -37,6 +37,10 @@
#define IFLA_XDP_FLAGS 3
#endif
+#ifndef SOL_NETLINK
+#define SOL_NETLINK 270
+#endif
+
/*
* When building perf, unistd.h is overridden. __NR_bpf is
* required to be defined explicitly.
@@ -441,6 +445,7 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
struct nlmsghdr *nh;
struct nlmsgerr *err;
socklen_t addrlen;
+ int one = 1;
memset(, 0, sizeof(sa));
sa.nl_family = AF_NETLINK;
@@ -450,6 +455,11 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
return -errno;
}
+ if (setsockopt(sock, SOL_NETLINK, NETLINK_EXT_ACK,
+ , sizeof(one)) < 0) {
+ fprintf(stderr, "Netlink error reporting not supported\n");
+ }
+
if (bind(sock, (struct sockaddr *), sizeof(sa)) < 0) {
ret = -errno;
goto cleanup;
@@ -526,6 +536,7 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
if (!err->error)
continue;
ret = err->error;
+ nla_dump_errormsg(nh);
goto cleanup;
case NLMSG_DONE:
break;
diff --git a/tools/lib/bpf/nlattr.c b/tools/lib/bpf/nlattr.c
new file mode 100644
index ..4719434278b2
--- /dev/null
+++ b/tools/lib/bpf/nlattr.c
@@ -0,0 +1,187 @@
+// SPDX-License-Identifier: LGPL-2.1
+
+/*
+ * NETLINK Netlink attributes
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation version 2.1
+ * of the License.
+ *
+ * Copyright (c) 2003-2013 Thomas Graf <tg...@suug.ch>
+ */
+
+#include
+#include "nlattr.h"
+#include
+#include
+#include
+
+static uint16_t nla_attr_minlen[NLA_TYPE_MAX+1] = {
+ [NLA_U8]= sizeof(uint8_t),
+ [NLA_U16] = sizeof(uint16_t),
+ [NLA_U32] = sizeof(uint32_t),
+ [NLA_U64] = sizeof(uint64_t),
+ [NLA_STRING]= 1,
+ [NLA_FLAG] = 0,
+};
+
+static int nla_len(const struct nlattr *nla)
+{
+ return nla->nla_len - NLA_HDRLEN;
+}
+
+static struct nlattr *nla_next(const struct nlattr *nla, int *remaining)
+{
+ int totlen = NLA_ALIGN(nla->nla_len);
+
+ *remaining -= totlen;
+ return (struct nlattr *) ((char *) nla + totlen);
+}
+
+static int nla_ok(const struct nlattr *nla, int remaining)
+{
+ return remaining >= sizeof(*nla) &&
+ nla->nla_len >= sizeof(*nla) &&
+ nla->nla_len <= remaining;
+}
+
+static void *nla_data(const struct nlattr *nla)
+{
+ return (char *) nla + NLA_HDRLEN;
+}
+
+static int nla_type(const struct nlattr *nla)
+{
+ return nla->nla_type &am
[PATCH bpf-next v7 3/5] libbpf: add error reporting in XDP
Parse netlink ext attribute to get the error message returned by
the card. Code is partially take from libnl.
We add netlink.h to the uapi include of tools. And we need to
avoid include of userspace netlink header to have a successful
build of sample so nlattr.h has a define to avoid
the inclusion. Using a direct define could have been an issue
as NLMSGERR_ATTR_MAX can change in the future.
We also define SOL_NETLINK if not defined to avoid to have to
copy socket.h for a fixed value.
Signed-off-by: Eric Leblond
Acked-by: Alexei Starovoitov
remote rtne
Signed-off-by: Eric Leblond
---
samples/bpf/Makefile | 2 +-
tools/lib/bpf/Build| 2 +-
tools/lib/bpf/bpf.c| 13 +++-
tools/lib/bpf/nlattr.c | 187 +
tools/lib/bpf/nlattr.h | 72 +++
5 files changed, 273 insertions(+), 3 deletions(-)
create mode 100644 tools/lib/bpf/nlattr.c
create mode 100644 tools/lib/bpf/nlattr.h
diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
index 7f61a3d57fa7..5c4cd3745282 100644
--- a/samples/bpf/Makefile
+++ b/samples/bpf/Makefile
@@ -45,7 +45,7 @@ hostprogs-y += xdp_rxq_info
hostprogs-y += syscall_tp
# Libbpf dependencies
-LIBBPF := ../../tools/lib/bpf/bpf.o
+LIBBPF := ../../tools/lib/bpf/bpf.o ../../tools/lib/bpf/nlattr.o
CGROUP_HELPERS := ../../tools/testing/selftests/bpf/cgroup_helpers.o
test_lru_dist-objs := test_lru_dist.o $(LIBBPF)
diff --git a/tools/lib/bpf/Build b/tools/lib/bpf/Build
index d8749756352d..64c679d67109 100644
--- a/tools/lib/bpf/Build
+++ b/tools/lib/bpf/Build
@@ -1 +1 @@
-libbpf-y := libbpf.o bpf.o
+libbpf-y := libbpf.o bpf.o nlattr.o
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index 749a447ec9ed..765fd95b0657 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -27,7 +27,7 @@
#include "bpf.h"
#include "libbpf.h"
#include "nlattr.h"
-#include
+#include
#include
#include
@@ -37,6 +37,10 @@
#define IFLA_XDP_FLAGS 3
#endif
+#ifndef SOL_NETLINK
+#define SOL_NETLINK 270
+#endif
+
/*
* When building perf, unistd.h is overridden. __NR_bpf is
* required to be defined explicitly.
@@ -441,6 +445,7 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
struct nlmsghdr *nh;
struct nlmsgerr *err;
socklen_t addrlen;
+ int one = 1;
memset(, 0, sizeof(sa));
sa.nl_family = AF_NETLINK;
@@ -450,6 +455,11 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
return -errno;
}
+ if (setsockopt(sock, SOL_NETLINK, NETLINK_EXT_ACK,
+ , sizeof(one)) < 0) {
+ fprintf(stderr, "Netlink error reporting not supported\n");
+ }
+
if (bind(sock, (struct sockaddr *), sizeof(sa)) < 0) {
ret = -errno;
goto cleanup;
@@ -526,6 +536,7 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
if (!err->error)
continue;
ret = err->error;
+ nla_dump_errormsg(nh);
goto cleanup;
case NLMSG_DONE:
break;
diff --git a/tools/lib/bpf/nlattr.c b/tools/lib/bpf/nlattr.c
new file mode 100644
index ..4719434278b2
--- /dev/null
+++ b/tools/lib/bpf/nlattr.c
@@ -0,0 +1,187 @@
+// SPDX-License-Identifier: LGPL-2.1
+
+/*
+ * NETLINK Netlink attributes
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation version 2.1
+ * of the License.
+ *
+ * Copyright (c) 2003-2013 Thomas Graf
+ */
+
+#include
+#include "nlattr.h"
+#include
+#include
+#include
+
+static uint16_t nla_attr_minlen[NLA_TYPE_MAX+1] = {
+ [NLA_U8]= sizeof(uint8_t),
+ [NLA_U16] = sizeof(uint16_t),
+ [NLA_U32] = sizeof(uint32_t),
+ [NLA_U64] = sizeof(uint64_t),
+ [NLA_STRING]= 1,
+ [NLA_FLAG] = 0,
+};
+
+static int nla_len(const struct nlattr *nla)
+{
+ return nla->nla_len - NLA_HDRLEN;
+}
+
+static struct nlattr *nla_next(const struct nlattr *nla, int *remaining)
+{
+ int totlen = NLA_ALIGN(nla->nla_len);
+
+ *remaining -= totlen;
+ return (struct nlattr *) ((char *) nla + totlen);
+}
+
+static int nla_ok(const struct nlattr *nla, int remaining)
+{
+ return remaining >= sizeof(*nla) &&
+ nla->nla_len >= sizeof(*nla) &&
+ nla->nla_len <= remaining;
+}
+
+static void *nla_data(const struct nlattr *nla)
+{
+ return (char *) nla + NLA_HDRLEN;
+}
+
+static int nla_type(const struct nlattr *nla)
+{
+ return nla->nla_type & NLA_TYPE_MASK;
+}
+
+static int validate_nla(struct nlattr *nla, int maxtype,
+
[PATCH bpf-next v7 1/5] tools: import netlink header in tools uapi
The header is necessary for libbpf compilation on system with older
version of the headers.
Signed-off-by: Eric Leblond <e...@regit.org>
---
tools/include/uapi/linux/netlink.h | 251 +
tools/lib/bpf/Makefile | 3 +
2 files changed, 254 insertions(+)
create mode 100644 tools/include/uapi/linux/netlink.h
diff --git a/tools/include/uapi/linux/netlink.h
b/tools/include/uapi/linux/netlink.h
new file mode 100644
index ..776bc92e9118
--- /dev/null
+++ b/tools/include/uapi/linux/netlink.h
@@ -0,0 +1,251 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef _UAPI__LINUX_NETLINK_H
+#define _UAPI__LINUX_NETLINK_H
+
+#include
+#include /* for __kernel_sa_family_t */
+#include
+
+#define NETLINK_ROUTE 0 /* Routing/device hook
*/
+#define NETLINK_UNUSED 1 /* Unused number
*/
+#define NETLINK_USERSOCK 2 /* Reserved for user mode socket
protocols */
+#define NETLINK_FIREWALL 3 /* Unused number, formerly ip_queue
*/
+#define NETLINK_SOCK_DIAG 4 /* socket monitoring
*/
+#define NETLINK_NFLOG 5 /* netfilter/iptables ULOG */
+#define NETLINK_XFRM 6 /* ipsec */
+#define NETLINK_SELINUX7 /* SELinux event notifications
*/
+#define NETLINK_ISCSI 8 /* Open-iSCSI */
+#define NETLINK_AUDIT 9 /* auditing */
+#define NETLINK_FIB_LOOKUP 10
+#define NETLINK_CONNECTOR 11
+#define NETLINK_NETFILTER 12 /* netfilter subsystem */
+#define NETLINK_IP6_FW 13
+#define NETLINK_DNRTMSG14 /* DECnet routing messages */
+#define NETLINK_KOBJECT_UEVENT 15 /* Kernel messages to userspace */
+#define NETLINK_GENERIC16
+/* leave room for NETLINK_DM (DM Events) */
+#define NETLINK_SCSITRANSPORT 18 /* SCSI Transports */
+#define NETLINK_ECRYPTFS 19
+#define NETLINK_RDMA 20
+#define NETLINK_CRYPTO 21 /* Crypto layer */
+#define NETLINK_SMC22 /* SMC monitoring */
+
+#define NETLINK_INET_DIAG NETLINK_SOCK_DIAG
+
+#define MAX_LINKS 32
+
+struct sockaddr_nl {
+ __kernel_sa_family_tnl_family; /* AF_NETLINK */
+ unsigned short nl_pad; /* zero */
+ __u32 nl_pid; /* port ID */
+ __u32 nl_groups; /* multicast groups mask */
+};
+
+struct nlmsghdr {
+ __u32 nlmsg_len; /* Length of message including header */
+ __u16 nlmsg_type; /* Message content */
+ __u16 nlmsg_flags;/* Additional flags */
+ __u32 nlmsg_seq; /* Sequence number */
+ __u32 nlmsg_pid; /* Sending process port ID */
+};
+
+/* Flags values */
+
+#define NLM_F_REQUEST 0x01/* It is request message. */
+#define NLM_F_MULTI0x02/* Multipart message, terminated by
NLMSG_DONE */
+#define NLM_F_ACK 0x04/* Reply with ack, with zero or error
code */
+#define NLM_F_ECHO 0x08/* Echo this request*/
+#define NLM_F_DUMP_INTR0x10/* Dump was inconsistent due to
sequence change */
+#define NLM_F_DUMP_FILTERED0x20/* Dump was filtered as requested */
+
+/* Modifiers to GET request */
+#define NLM_F_ROOT 0x100 /* specify tree root*/
+#define NLM_F_MATCH0x200 /* return all matching */
+#define NLM_F_ATOMIC 0x400 /* atomic GET */
+#define NLM_F_DUMP (NLM_F_ROOT|NLM_F_MATCH)
+
+/* Modifiers to NEW request */
+#define NLM_F_REPLACE 0x100 /* Override existing*/
+#define NLM_F_EXCL 0x200 /* Do not touch, if it exists */
+#define NLM_F_CREATE 0x400 /* Create, if it does not exist */
+#define NLM_F_APPEND 0x800 /* Add to end of list */
+
+/* Modifiers to DELETE request */
+#define NLM_F_NONREC 0x100 /* Do not delete recursively*/
+
+/* Flags for ACK message */
+#define NLM_F_CAPPED 0x100 /* request was capped */
+#define NLM_F_ACK_TLVS 0x200 /* extended ACK TVLs were included */
+
+/*
+ 4.4BSD ADD NLM_F_CREATE|NLM_F_EXCL
+ 4.4BSD CHANGE NLM_F_REPLACE
+
+ True CHANGE NLM_F_CREATE|NLM_F_REPLACE
+ Append NLM_F_CREATE
+ Check NLM_F_EXCL
+ */
+
+#define NLMSG_ALIGNTO 4U
+#define NLMSG_ALIGN(len) ( ((len)+NLMSG_ALIGNTO-1) & ~(NLMSG_ALIGNTO-1) )
+#define NLMSG_HDRLEN((int) NLMSG_ALIGN(sizeof(struct nlmsghdr)))
+#define NLMSG_LENGTH(len) ((len) + NLMSG_HDRLEN)
+#define NLMSG_SPACE(len) NLMSG_ALIGN(NLMSG_LENGTH(len))
+#define NLMSG_DATA(nlh) ((void*)(((char*)nlh) + NLMSG_LENGTH(0)))
+#define NLMSG_NEXT(nlh,len) ((len) -= NLMSG_ALIGN((nlh)->nlmsg_len), \
+
[PATCH bpf-next v7 0/5] libbpf: add XDP setup support
Hello, This patchset fixes the problem found by Alexei when building libbpf on a system with old headers. It has been tested on an old Ubuntu and seems to behave fine. Best regards, -- Eric
[PATCH bpf-next v7 1/5] tools: import netlink header in tools uapi
The header is necessary for libbpf compilation on system with older
version of the headers.
Signed-off-by: Eric Leblond
---
tools/include/uapi/linux/netlink.h | 251 +
tools/lib/bpf/Makefile | 3 +
2 files changed, 254 insertions(+)
create mode 100644 tools/include/uapi/linux/netlink.h
diff --git a/tools/include/uapi/linux/netlink.h
b/tools/include/uapi/linux/netlink.h
new file mode 100644
index ..776bc92e9118
--- /dev/null
+++ b/tools/include/uapi/linux/netlink.h
@@ -0,0 +1,251 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef _UAPI__LINUX_NETLINK_H
+#define _UAPI__LINUX_NETLINK_H
+
+#include
+#include /* for __kernel_sa_family_t */
+#include
+
+#define NETLINK_ROUTE 0 /* Routing/device hook
*/
+#define NETLINK_UNUSED 1 /* Unused number
*/
+#define NETLINK_USERSOCK 2 /* Reserved for user mode socket
protocols */
+#define NETLINK_FIREWALL 3 /* Unused number, formerly ip_queue
*/
+#define NETLINK_SOCK_DIAG 4 /* socket monitoring
*/
+#define NETLINK_NFLOG 5 /* netfilter/iptables ULOG */
+#define NETLINK_XFRM 6 /* ipsec */
+#define NETLINK_SELINUX7 /* SELinux event notifications
*/
+#define NETLINK_ISCSI 8 /* Open-iSCSI */
+#define NETLINK_AUDIT 9 /* auditing */
+#define NETLINK_FIB_LOOKUP 10
+#define NETLINK_CONNECTOR 11
+#define NETLINK_NETFILTER 12 /* netfilter subsystem */
+#define NETLINK_IP6_FW 13
+#define NETLINK_DNRTMSG14 /* DECnet routing messages */
+#define NETLINK_KOBJECT_UEVENT 15 /* Kernel messages to userspace */
+#define NETLINK_GENERIC16
+/* leave room for NETLINK_DM (DM Events) */
+#define NETLINK_SCSITRANSPORT 18 /* SCSI Transports */
+#define NETLINK_ECRYPTFS 19
+#define NETLINK_RDMA 20
+#define NETLINK_CRYPTO 21 /* Crypto layer */
+#define NETLINK_SMC22 /* SMC monitoring */
+
+#define NETLINK_INET_DIAG NETLINK_SOCK_DIAG
+
+#define MAX_LINKS 32
+
+struct sockaddr_nl {
+ __kernel_sa_family_tnl_family; /* AF_NETLINK */
+ unsigned short nl_pad; /* zero */
+ __u32 nl_pid; /* port ID */
+ __u32 nl_groups; /* multicast groups mask */
+};
+
+struct nlmsghdr {
+ __u32 nlmsg_len; /* Length of message including header */
+ __u16 nlmsg_type; /* Message content */
+ __u16 nlmsg_flags;/* Additional flags */
+ __u32 nlmsg_seq; /* Sequence number */
+ __u32 nlmsg_pid; /* Sending process port ID */
+};
+
+/* Flags values */
+
+#define NLM_F_REQUEST 0x01/* It is request message. */
+#define NLM_F_MULTI0x02/* Multipart message, terminated by
NLMSG_DONE */
+#define NLM_F_ACK 0x04/* Reply with ack, with zero or error
code */
+#define NLM_F_ECHO 0x08/* Echo this request*/
+#define NLM_F_DUMP_INTR0x10/* Dump was inconsistent due to
sequence change */
+#define NLM_F_DUMP_FILTERED0x20/* Dump was filtered as requested */
+
+/* Modifiers to GET request */
+#define NLM_F_ROOT 0x100 /* specify tree root*/
+#define NLM_F_MATCH0x200 /* return all matching */
+#define NLM_F_ATOMIC 0x400 /* atomic GET */
+#define NLM_F_DUMP (NLM_F_ROOT|NLM_F_MATCH)
+
+/* Modifiers to NEW request */
+#define NLM_F_REPLACE 0x100 /* Override existing*/
+#define NLM_F_EXCL 0x200 /* Do not touch, if it exists */
+#define NLM_F_CREATE 0x400 /* Create, if it does not exist */
+#define NLM_F_APPEND 0x800 /* Add to end of list */
+
+/* Modifiers to DELETE request */
+#define NLM_F_NONREC 0x100 /* Do not delete recursively*/
+
+/* Flags for ACK message */
+#define NLM_F_CAPPED 0x100 /* request was capped */
+#define NLM_F_ACK_TLVS 0x200 /* extended ACK TVLs were included */
+
+/*
+ 4.4BSD ADD NLM_F_CREATE|NLM_F_EXCL
+ 4.4BSD CHANGE NLM_F_REPLACE
+
+ True CHANGE NLM_F_CREATE|NLM_F_REPLACE
+ Append NLM_F_CREATE
+ Check NLM_F_EXCL
+ */
+
+#define NLMSG_ALIGNTO 4U
+#define NLMSG_ALIGN(len) ( ((len)+NLMSG_ALIGNTO-1) & ~(NLMSG_ALIGNTO-1) )
+#define NLMSG_HDRLEN((int) NLMSG_ALIGN(sizeof(struct nlmsghdr)))
+#define NLMSG_LENGTH(len) ((len) + NLMSG_HDRLEN)
+#define NLMSG_SPACE(len) NLMSG_ALIGN(NLMSG_LENGTH(len))
+#define NLMSG_DATA(nlh) ((void*)(((char*)nlh) + NLMSG_LENGTH(0)))
+#define NLMSG_NEXT(nlh,len) ((len) -= NLMSG_ALIGN((nlh)->nlmsg_len), \
+ (struct nlmsghdr*)
[PATCH bpf-next v7 0/5] libbpf: add XDP setup support
Hello, This patchset fixes the problem found by Alexei when building libbpf on a system with old headers. It has been tested on an old Ubuntu and seems to behave fine. Best regards, -- Eric
[PATCH bpf-next v7 2/5] libbpf: add function to setup XDP
Most of the code is taken from set_link_xdp_fd() in bpf_load.c and
slightly modified to be library compliant.
Signed-off-by: Eric Leblond <e...@regit.org>
Acked-by: Alexei Starovoitov <a...@kernel.org>
---
tools/lib/bpf/bpf.c| 127 +
tools/lib/bpf/libbpf.c | 2 +
tools/lib/bpf/libbpf.h | 4 ++
3 files changed, 133 insertions(+)
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index 5128677e4117..749a447ec9ed 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -25,6 +25,17 @@
#include
#include
#include "bpf.h"
+#include "libbpf.h"
+#include "nlattr.h"
+#include
+#include
+#include
+
+#ifndef IFLA_XDP_MAX
+#define IFLA_XDP 43
+#define IFLA_XDP_FD1
+#define IFLA_XDP_FLAGS 3
+#endif
/*
* When building perf, unistd.h is overridden. __NR_bpf is
@@ -46,7 +57,9 @@
# endif
#endif
+#ifndef min
#define min(x, y) ((x) < (y) ? (x) : (y))
+#endif
static inline __u64 ptr_to_u64(const void *ptr)
{
@@ -413,3 +426,117 @@ int bpf_obj_get_info_by_fd(int prog_fd, void *info, __u32
*info_len)
return err;
}
+
+int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
+{
+ struct sockaddr_nl sa;
+ int sock, seq = 0, len, ret = -1;
+ char buf[4096];
+ struct nlattr *nla, *nla_xdp;
+ struct {
+ struct nlmsghdr nh;
+ struct ifinfomsg ifinfo;
+ char attrbuf[64];
+ } req;
+ struct nlmsghdr *nh;
+ struct nlmsgerr *err;
+ socklen_t addrlen;
+
+ memset(, 0, sizeof(sa));
+ sa.nl_family = AF_NETLINK;
+
+ sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
+ if (sock < 0) {
+ return -errno;
+ }
+
+ if (bind(sock, (struct sockaddr *), sizeof(sa)) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ addrlen = sizeof(sa);
+ if (getsockname(sock, (struct sockaddr *), ) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ if (addrlen != sizeof(sa)) {
+ ret = -LIBBPF_ERRNO__INTERNAL;
+ goto cleanup;
+ }
+
+ memset(, 0, sizeof(req));
+ req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
+ req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
+ req.nh.nlmsg_type = RTM_SETLINK;
+ req.nh.nlmsg_pid = 0;
+ req.nh.nlmsg_seq = ++seq;
+ req.ifinfo.ifi_family = AF_UNSPEC;
+ req.ifinfo.ifi_index = ifindex;
+
+ /* started nested attribute for XDP */
+ nla = (struct nlattr *)(((char *))
+ + NLMSG_ALIGN(req.nh.nlmsg_len));
+ nla->nla_type = NLA_F_NESTED | IFLA_XDP;
+ nla->nla_len = NLA_HDRLEN;
+
+ /* add XDP fd */
+ nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
+ nla_xdp->nla_type = IFLA_XDP_FD;
+ nla_xdp->nla_len = NLA_HDRLEN + sizeof(int);
+ memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(fd));
+ nla->nla_len += nla_xdp->nla_len;
+
+ /* if user passed in any flags, add those too */
+ if (flags) {
+ nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
+ nla_xdp->nla_type = IFLA_XDP_FLAGS;
+ nla_xdp->nla_len = NLA_HDRLEN + sizeof(flags);
+ memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(flags));
+ nla->nla_len += nla_xdp->nla_len;
+ }
+
+ req.nh.nlmsg_len += NLA_ALIGN(nla->nla_len);
+
+ if (send(sock, , req.nh.nlmsg_len, 0) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ len = recv(sock, buf, sizeof(buf), 0);
+ if (len < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ for (nh = (struct nlmsghdr *)buf; NLMSG_OK(nh, len);
+nh = NLMSG_NEXT(nh, len)) {
+ if (nh->nlmsg_pid != sa.nl_pid) {
+ ret = -LIBBPF_ERRNO__WRNGPID;
+ goto cleanup;
+ }
+ if (nh->nlmsg_seq != seq) {
+ ret = -LIBBPF_ERRNO__INVSEQ;
+ goto cleanup;
+ }
+ switch (nh->nlmsg_type) {
+ case NLMSG_ERROR:
+ err = (struct nlmsgerr *)NLMSG_DATA(nh);
+ if (!err->error)
+ continue;
+ ret = err->error;
+ goto cleanup;
+ case NLMSG_DONE:
+ break;
+ default:
+ break;
+ }
+ }
+
+ ret = 0;
+
+cleanup:
+ close(sock);
+ return ret;
+}
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 30c776375118..c60122d3ea85 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/li
[PATCH bpf-next v7 5/5] samples/bpf: use bpf_set_link_xdp_fd
Use bpf_set_link_xdp_fd instead of set_link_xdp_fd to remove some
code duplication and benefit of netlink ext ack errors message.
Signed-off-by: Eric Leblond <e...@regit.org>
---
samples/bpf/bpf_load.c | 102
samples/bpf/bpf_load.h | 2 +-
samples/bpf/xdp1_user.c | 4 +-
samples/bpf/xdp_redirect_cpu_user.c | 6 +--
samples/bpf/xdp_redirect_map_user.c | 8 +--
samples/bpf/xdp_redirect_user.c | 8 +--
samples/bpf/xdp_router_ipv4_user.c | 10 ++--
samples/bpf/xdp_rxq_info_user.c | 4 +-
samples/bpf/xdp_tx_iptunnel_user.c | 6 +--
9 files changed, 24 insertions(+), 126 deletions(-)
diff --git a/samples/bpf/bpf_load.c b/samples/bpf/bpf_load.c
index 242631aa4ea2..69806d74fa53 100644
--- a/samples/bpf/bpf_load.c
+++ b/samples/bpf/bpf_load.c
@@ -695,105 +695,3 @@ struct ksym *ksym_search(long key)
return [0];
}
-int set_link_xdp_fd(int ifindex, int fd, __u32 flags)
-{
- struct sockaddr_nl sa;
- int sock, seq = 0, len, ret = -1;
- char buf[4096];
- struct nlattr *nla, *nla_xdp;
- struct {
- struct nlmsghdr nh;
- struct ifinfomsg ifinfo;
- char attrbuf[64];
- } req;
- struct nlmsghdr *nh;
- struct nlmsgerr *err;
-
- memset(, 0, sizeof(sa));
- sa.nl_family = AF_NETLINK;
-
- sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
- if (sock < 0) {
- printf("open netlink socket: %s\n", strerror(errno));
- return -1;
- }
-
- if (bind(sock, (struct sockaddr *), sizeof(sa)) < 0) {
- printf("bind to netlink: %s\n", strerror(errno));
- goto cleanup;
- }
-
- memset(, 0, sizeof(req));
- req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
- req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
- req.nh.nlmsg_type = RTM_SETLINK;
- req.nh.nlmsg_pid = 0;
- req.nh.nlmsg_seq = ++seq;
- req.ifinfo.ifi_family = AF_UNSPEC;
- req.ifinfo.ifi_index = ifindex;
-
- /* started nested attribute for XDP */
- nla = (struct nlattr *)(((char *))
- + NLMSG_ALIGN(req.nh.nlmsg_len));
- nla->nla_type = NLA_F_NESTED | 43/*IFLA_XDP*/;
- nla->nla_len = NLA_HDRLEN;
-
- /* add XDP fd */
- nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
- nla_xdp->nla_type = 1/*IFLA_XDP_FD*/;
- nla_xdp->nla_len = NLA_HDRLEN + sizeof(int);
- memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(fd));
- nla->nla_len += nla_xdp->nla_len;
-
- /* if user passed in any flags, add those too */
- if (flags) {
- nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
- nla_xdp->nla_type = 3/*IFLA_XDP_FLAGS*/;
- nla_xdp->nla_len = NLA_HDRLEN + sizeof(flags);
- memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(flags));
- nla->nla_len += nla_xdp->nla_len;
- }
-
- req.nh.nlmsg_len += NLA_ALIGN(nla->nla_len);
-
- if (send(sock, , req.nh.nlmsg_len, 0) < 0) {
- printf("send to netlink: %s\n", strerror(errno));
- goto cleanup;
- }
-
- len = recv(sock, buf, sizeof(buf), 0);
- if (len < 0) {
- printf("recv from netlink: %s\n", strerror(errno));
- goto cleanup;
- }
-
- for (nh = (struct nlmsghdr *)buf; NLMSG_OK(nh, len);
-nh = NLMSG_NEXT(nh, len)) {
- if (nh->nlmsg_pid != getpid()) {
- printf("Wrong pid %d, expected %d\n",
- nh->nlmsg_pid, getpid());
- goto cleanup;
- }
- if (nh->nlmsg_seq != seq) {
- printf("Wrong seq %d, expected %d\n",
- nh->nlmsg_seq, seq);
- goto cleanup;
- }
- switch (nh->nlmsg_type) {
- case NLMSG_ERROR:
- err = (struct nlmsgerr *)NLMSG_DATA(nh);
- if (!err->error)
- continue;
- printf("nlmsg error %s\n", strerror(-err->error));
- goto cleanup;
- case NLMSG_DONE:
- break;
- }
- }
-
- ret = 0;
-
-cleanup:
- close(sock);
- return ret;
-}
diff --git a/samples/bpf/bpf_load.h b/samples/bpf/bpf_load.h
index 7d57a4248893..453c200b389b 100644
--- a/samples/bpf/bpf_load.h
+++ b/samples/bpf/bpf_load.h
@@ -61,5 +61,5 @@ struct ksym {
int load_kallsyms(void);
struct ksym *ksym_search(long key);
-int set_link_xdp_fd(int ifindex, int fd, __u32 flags);
+int bpf_set_link_xdp_
[PATCH bpf-next v7 2/5] libbpf: add function to setup XDP
Most of the code is taken from set_link_xdp_fd() in bpf_load.c and
slightly modified to be library compliant.
Signed-off-by: Eric Leblond
Acked-by: Alexei Starovoitov
---
tools/lib/bpf/bpf.c| 127 +
tools/lib/bpf/libbpf.c | 2 +
tools/lib/bpf/libbpf.h | 4 ++
3 files changed, 133 insertions(+)
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index 5128677e4117..749a447ec9ed 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -25,6 +25,17 @@
#include
#include
#include "bpf.h"
+#include "libbpf.h"
+#include "nlattr.h"
+#include
+#include
+#include
+
+#ifndef IFLA_XDP_MAX
+#define IFLA_XDP 43
+#define IFLA_XDP_FD1
+#define IFLA_XDP_FLAGS 3
+#endif
/*
* When building perf, unistd.h is overridden. __NR_bpf is
@@ -46,7 +57,9 @@
# endif
#endif
+#ifndef min
#define min(x, y) ((x) < (y) ? (x) : (y))
+#endif
static inline __u64 ptr_to_u64(const void *ptr)
{
@@ -413,3 +426,117 @@ int bpf_obj_get_info_by_fd(int prog_fd, void *info, __u32
*info_len)
return err;
}
+
+int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
+{
+ struct sockaddr_nl sa;
+ int sock, seq = 0, len, ret = -1;
+ char buf[4096];
+ struct nlattr *nla, *nla_xdp;
+ struct {
+ struct nlmsghdr nh;
+ struct ifinfomsg ifinfo;
+ char attrbuf[64];
+ } req;
+ struct nlmsghdr *nh;
+ struct nlmsgerr *err;
+ socklen_t addrlen;
+
+ memset(, 0, sizeof(sa));
+ sa.nl_family = AF_NETLINK;
+
+ sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
+ if (sock < 0) {
+ return -errno;
+ }
+
+ if (bind(sock, (struct sockaddr *), sizeof(sa)) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ addrlen = sizeof(sa);
+ if (getsockname(sock, (struct sockaddr *), ) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ if (addrlen != sizeof(sa)) {
+ ret = -LIBBPF_ERRNO__INTERNAL;
+ goto cleanup;
+ }
+
+ memset(, 0, sizeof(req));
+ req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
+ req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
+ req.nh.nlmsg_type = RTM_SETLINK;
+ req.nh.nlmsg_pid = 0;
+ req.nh.nlmsg_seq = ++seq;
+ req.ifinfo.ifi_family = AF_UNSPEC;
+ req.ifinfo.ifi_index = ifindex;
+
+ /* started nested attribute for XDP */
+ nla = (struct nlattr *)(((char *))
+ + NLMSG_ALIGN(req.nh.nlmsg_len));
+ nla->nla_type = NLA_F_NESTED | IFLA_XDP;
+ nla->nla_len = NLA_HDRLEN;
+
+ /* add XDP fd */
+ nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
+ nla_xdp->nla_type = IFLA_XDP_FD;
+ nla_xdp->nla_len = NLA_HDRLEN + sizeof(int);
+ memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(fd));
+ nla->nla_len += nla_xdp->nla_len;
+
+ /* if user passed in any flags, add those too */
+ if (flags) {
+ nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
+ nla_xdp->nla_type = IFLA_XDP_FLAGS;
+ nla_xdp->nla_len = NLA_HDRLEN + sizeof(flags);
+ memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(flags));
+ nla->nla_len += nla_xdp->nla_len;
+ }
+
+ req.nh.nlmsg_len += NLA_ALIGN(nla->nla_len);
+
+ if (send(sock, , req.nh.nlmsg_len, 0) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ len = recv(sock, buf, sizeof(buf), 0);
+ if (len < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ for (nh = (struct nlmsghdr *)buf; NLMSG_OK(nh, len);
+nh = NLMSG_NEXT(nh, len)) {
+ if (nh->nlmsg_pid != sa.nl_pid) {
+ ret = -LIBBPF_ERRNO__WRNGPID;
+ goto cleanup;
+ }
+ if (nh->nlmsg_seq != seq) {
+ ret = -LIBBPF_ERRNO__INVSEQ;
+ goto cleanup;
+ }
+ switch (nh->nlmsg_type) {
+ case NLMSG_ERROR:
+ err = (struct nlmsgerr *)NLMSG_DATA(nh);
+ if (!err->error)
+ continue;
+ ret = err->error;
+ goto cleanup;
+ case NLMSG_DONE:
+ break;
+ default:
+ break;
+ }
+ }
+
+ ret = 0;
+
+cleanup:
+ close(sock);
+ return ret;
+}
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 30c776375118..c60122d3ea85 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -106,6 +106,8 @@ static cons
[PATCH bpf-next v7 5/5] samples/bpf: use bpf_set_link_xdp_fd
Use bpf_set_link_xdp_fd instead of set_link_xdp_fd to remove some
code duplication and benefit of netlink ext ack errors message.
Signed-off-by: Eric Leblond
---
samples/bpf/bpf_load.c | 102
samples/bpf/bpf_load.h | 2 +-
samples/bpf/xdp1_user.c | 4 +-
samples/bpf/xdp_redirect_cpu_user.c | 6 +--
samples/bpf/xdp_redirect_map_user.c | 8 +--
samples/bpf/xdp_redirect_user.c | 8 +--
samples/bpf/xdp_router_ipv4_user.c | 10 ++--
samples/bpf/xdp_rxq_info_user.c | 4 +-
samples/bpf/xdp_tx_iptunnel_user.c | 6 +--
9 files changed, 24 insertions(+), 126 deletions(-)
diff --git a/samples/bpf/bpf_load.c b/samples/bpf/bpf_load.c
index 242631aa4ea2..69806d74fa53 100644
--- a/samples/bpf/bpf_load.c
+++ b/samples/bpf/bpf_load.c
@@ -695,105 +695,3 @@ struct ksym *ksym_search(long key)
return [0];
}
-int set_link_xdp_fd(int ifindex, int fd, __u32 flags)
-{
- struct sockaddr_nl sa;
- int sock, seq = 0, len, ret = -1;
- char buf[4096];
- struct nlattr *nla, *nla_xdp;
- struct {
- struct nlmsghdr nh;
- struct ifinfomsg ifinfo;
- char attrbuf[64];
- } req;
- struct nlmsghdr *nh;
- struct nlmsgerr *err;
-
- memset(, 0, sizeof(sa));
- sa.nl_family = AF_NETLINK;
-
- sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
- if (sock < 0) {
- printf("open netlink socket: %s\n", strerror(errno));
- return -1;
- }
-
- if (bind(sock, (struct sockaddr *), sizeof(sa)) < 0) {
- printf("bind to netlink: %s\n", strerror(errno));
- goto cleanup;
- }
-
- memset(, 0, sizeof(req));
- req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
- req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
- req.nh.nlmsg_type = RTM_SETLINK;
- req.nh.nlmsg_pid = 0;
- req.nh.nlmsg_seq = ++seq;
- req.ifinfo.ifi_family = AF_UNSPEC;
- req.ifinfo.ifi_index = ifindex;
-
- /* started nested attribute for XDP */
- nla = (struct nlattr *)(((char *))
- + NLMSG_ALIGN(req.nh.nlmsg_len));
- nla->nla_type = NLA_F_NESTED | 43/*IFLA_XDP*/;
- nla->nla_len = NLA_HDRLEN;
-
- /* add XDP fd */
- nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
- nla_xdp->nla_type = 1/*IFLA_XDP_FD*/;
- nla_xdp->nla_len = NLA_HDRLEN + sizeof(int);
- memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(fd));
- nla->nla_len += nla_xdp->nla_len;
-
- /* if user passed in any flags, add those too */
- if (flags) {
- nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
- nla_xdp->nla_type = 3/*IFLA_XDP_FLAGS*/;
- nla_xdp->nla_len = NLA_HDRLEN + sizeof(flags);
- memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(flags));
- nla->nla_len += nla_xdp->nla_len;
- }
-
- req.nh.nlmsg_len += NLA_ALIGN(nla->nla_len);
-
- if (send(sock, , req.nh.nlmsg_len, 0) < 0) {
- printf("send to netlink: %s\n", strerror(errno));
- goto cleanup;
- }
-
- len = recv(sock, buf, sizeof(buf), 0);
- if (len < 0) {
- printf("recv from netlink: %s\n", strerror(errno));
- goto cleanup;
- }
-
- for (nh = (struct nlmsghdr *)buf; NLMSG_OK(nh, len);
-nh = NLMSG_NEXT(nh, len)) {
- if (nh->nlmsg_pid != getpid()) {
- printf("Wrong pid %d, expected %d\n",
- nh->nlmsg_pid, getpid());
- goto cleanup;
- }
- if (nh->nlmsg_seq != seq) {
- printf("Wrong seq %d, expected %d\n",
- nh->nlmsg_seq, seq);
- goto cleanup;
- }
- switch (nh->nlmsg_type) {
- case NLMSG_ERROR:
- err = (struct nlmsgerr *)NLMSG_DATA(nh);
- if (!err->error)
- continue;
- printf("nlmsg error %s\n", strerror(-err->error));
- goto cleanup;
- case NLMSG_DONE:
- break;
- }
- }
-
- ret = 0;
-
-cleanup:
- close(sock);
- return ret;
-}
diff --git a/samples/bpf/bpf_load.h b/samples/bpf/bpf_load.h
index 7d57a4248893..453c200b389b 100644
--- a/samples/bpf/bpf_load.h
+++ b/samples/bpf/bpf_load.h
@@ -61,5 +61,5 @@ struct ksym {
int load_kallsyms(void);
struct ksym *ksym_search(long key);
-int set_link_xdp_fd(int ifindex, int fd, __u32 flags);
+int bpf_set_link_xdp_fd(int ifindex, int fd,
[PATCH bpf-next v6 2/4] libbpf: add error reporting in XDP
Parse netlink ext attribute to get the error message returned by
the card. Code is partially take from libnl.
Signed-off-by: Eric Leblond <e...@regit.org>
Acked-by: Alexei Starovoitov <a...@kernel.org>
---
samples/bpf/Makefile | 2 +-
tools/lib/bpf/Build| 2 +-
tools/lib/bpf/bpf.c| 8 +++
tools/lib/bpf/nlattr.c | 187 +
tools/lib/bpf/nlattr.h | 70 ++
5 files changed, 267 insertions(+), 2 deletions(-)
create mode 100644 tools/lib/bpf/nlattr.c
create mode 100644 tools/lib/bpf/nlattr.h
diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
index 7f61a3d57fa7..5c4cd3745282 100644
--- a/samples/bpf/Makefile
+++ b/samples/bpf/Makefile
@@ -45,7 +45,7 @@ hostprogs-y += xdp_rxq_info
hostprogs-y += syscall_tp
# Libbpf dependencies
-LIBBPF := ../../tools/lib/bpf/bpf.o
+LIBBPF := ../../tools/lib/bpf/bpf.o ../../tools/lib/bpf/nlattr.o
CGROUP_HELPERS := ../../tools/testing/selftests/bpf/cgroup_helpers.o
test_lru_dist-objs := test_lru_dist.o $(LIBBPF)
diff --git a/tools/lib/bpf/Build b/tools/lib/bpf/Build
index d8749756352d..64c679d67109 100644
--- a/tools/lib/bpf/Build
+++ b/tools/lib/bpf/Build
@@ -1 +1 @@
-libbpf-y := libbpf.o bpf.o
+libbpf-y := libbpf.o bpf.o nlattr.o
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index e6c61035b64c..4517dce6849d 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -26,6 +26,7 @@
#include
#include "bpf.h"
#include "libbpf.h"
+#include "nlattr.h"
#include
#include
#include
@@ -440,6 +441,7 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
struct nlmsghdr *nh;
struct nlmsgerr *err;
socklen_t addrlen;
+ int one = 1;
memset(, 0, sizeof(sa));
sa.nl_family = AF_NETLINK;
@@ -449,6 +451,11 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
return -errno;
}
+ if (setsockopt(sock, SOL_NETLINK, NETLINK_EXT_ACK,
+ , sizeof(one)) < 0) {
+ fprintf(stderr, "Netlink error reporting not supported\n");
+ }
+
if (bind(sock, (struct sockaddr *), sizeof(sa)) < 0) {
ret = -errno;
goto cleanup;
@@ -525,6 +532,7 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
if (!err->error)
continue;
ret = err->error;
+ nla_dump_errormsg(nh);
goto cleanup;
case NLMSG_DONE:
break;
diff --git a/tools/lib/bpf/nlattr.c b/tools/lib/bpf/nlattr.c
new file mode 100644
index ..4719434278b2
--- /dev/null
+++ b/tools/lib/bpf/nlattr.c
@@ -0,0 +1,187 @@
+// SPDX-License-Identifier: LGPL-2.1
+
+/*
+ * NETLINK Netlink attributes
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation version 2.1
+ * of the License.
+ *
+ * Copyright (c) 2003-2013 Thomas Graf <tg...@suug.ch>
+ */
+
+#include
+#include "nlattr.h"
+#include
+#include
+#include
+
+static uint16_t nla_attr_minlen[NLA_TYPE_MAX+1] = {
+ [NLA_U8]= sizeof(uint8_t),
+ [NLA_U16] = sizeof(uint16_t),
+ [NLA_U32] = sizeof(uint32_t),
+ [NLA_U64] = sizeof(uint64_t),
+ [NLA_STRING]= 1,
+ [NLA_FLAG] = 0,
+};
+
+static int nla_len(const struct nlattr *nla)
+{
+ return nla->nla_len - NLA_HDRLEN;
+}
+
+static struct nlattr *nla_next(const struct nlattr *nla, int *remaining)
+{
+ int totlen = NLA_ALIGN(nla->nla_len);
+
+ *remaining -= totlen;
+ return (struct nlattr *) ((char *) nla + totlen);
+}
+
+static int nla_ok(const struct nlattr *nla, int remaining)
+{
+ return remaining >= sizeof(*nla) &&
+ nla->nla_len >= sizeof(*nla) &&
+ nla->nla_len <= remaining;
+}
+
+static void *nla_data(const struct nlattr *nla)
+{
+ return (char *) nla + NLA_HDRLEN;
+}
+
+static int nla_type(const struct nlattr *nla)
+{
+ return nla->nla_type & NLA_TYPE_MASK;
+}
+
+static int validate_nla(struct nlattr *nla, int maxtype,
+ struct nla_policy *policy)
+{
+ struct nla_policy *pt;
+ unsigned int minlen = 0;
+ int type = nla_type(nla);
+
+ if (type < 0 || type > maxtype)
+ return 0;
+
+ pt = [type];
+
+ if (pt->type > NLA_TYPE_MAX)
+ return 0;
+
+ if (pt->minlen)
+ minlen = pt->minlen;
+ else if (pt->type != NLA_UNSPEC)
+ minlen = nla_attr_minlen[pt->type];
+
+ if (nla_len(nla) < minlen)
+ return -1;
+
+ if (pt->maxlen &&
[PATCH bpf-next v6 2/4] libbpf: add error reporting in XDP
Parse netlink ext attribute to get the error message returned by
the card. Code is partially take from libnl.
Signed-off-by: Eric Leblond
Acked-by: Alexei Starovoitov
---
samples/bpf/Makefile | 2 +-
tools/lib/bpf/Build| 2 +-
tools/lib/bpf/bpf.c| 8 +++
tools/lib/bpf/nlattr.c | 187 +
tools/lib/bpf/nlattr.h | 70 ++
5 files changed, 267 insertions(+), 2 deletions(-)
create mode 100644 tools/lib/bpf/nlattr.c
create mode 100644 tools/lib/bpf/nlattr.h
diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
index 7f61a3d57fa7..5c4cd3745282 100644
--- a/samples/bpf/Makefile
+++ b/samples/bpf/Makefile
@@ -45,7 +45,7 @@ hostprogs-y += xdp_rxq_info
hostprogs-y += syscall_tp
# Libbpf dependencies
-LIBBPF := ../../tools/lib/bpf/bpf.o
+LIBBPF := ../../tools/lib/bpf/bpf.o ../../tools/lib/bpf/nlattr.o
CGROUP_HELPERS := ../../tools/testing/selftests/bpf/cgroup_helpers.o
test_lru_dist-objs := test_lru_dist.o $(LIBBPF)
diff --git a/tools/lib/bpf/Build b/tools/lib/bpf/Build
index d8749756352d..64c679d67109 100644
--- a/tools/lib/bpf/Build
+++ b/tools/lib/bpf/Build
@@ -1 +1 @@
-libbpf-y := libbpf.o bpf.o
+libbpf-y := libbpf.o bpf.o nlattr.o
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index e6c61035b64c..4517dce6849d 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -26,6 +26,7 @@
#include
#include "bpf.h"
#include "libbpf.h"
+#include "nlattr.h"
#include
#include
#include
@@ -440,6 +441,7 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
struct nlmsghdr *nh;
struct nlmsgerr *err;
socklen_t addrlen;
+ int one = 1;
memset(, 0, sizeof(sa));
sa.nl_family = AF_NETLINK;
@@ -449,6 +451,11 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
return -errno;
}
+ if (setsockopt(sock, SOL_NETLINK, NETLINK_EXT_ACK,
+ , sizeof(one)) < 0) {
+ fprintf(stderr, "Netlink error reporting not supported\n");
+ }
+
if (bind(sock, (struct sockaddr *), sizeof(sa)) < 0) {
ret = -errno;
goto cleanup;
@@ -525,6 +532,7 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
if (!err->error)
continue;
ret = err->error;
+ nla_dump_errormsg(nh);
goto cleanup;
case NLMSG_DONE:
break;
diff --git a/tools/lib/bpf/nlattr.c b/tools/lib/bpf/nlattr.c
new file mode 100644
index ..4719434278b2
--- /dev/null
+++ b/tools/lib/bpf/nlattr.c
@@ -0,0 +1,187 @@
+// SPDX-License-Identifier: LGPL-2.1
+
+/*
+ * NETLINK Netlink attributes
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation version 2.1
+ * of the License.
+ *
+ * Copyright (c) 2003-2013 Thomas Graf
+ */
+
+#include
+#include "nlattr.h"
+#include
+#include
+#include
+
+static uint16_t nla_attr_minlen[NLA_TYPE_MAX+1] = {
+ [NLA_U8]= sizeof(uint8_t),
+ [NLA_U16] = sizeof(uint16_t),
+ [NLA_U32] = sizeof(uint32_t),
+ [NLA_U64] = sizeof(uint64_t),
+ [NLA_STRING]= 1,
+ [NLA_FLAG] = 0,
+};
+
+static int nla_len(const struct nlattr *nla)
+{
+ return nla->nla_len - NLA_HDRLEN;
+}
+
+static struct nlattr *nla_next(const struct nlattr *nla, int *remaining)
+{
+ int totlen = NLA_ALIGN(nla->nla_len);
+
+ *remaining -= totlen;
+ return (struct nlattr *) ((char *) nla + totlen);
+}
+
+static int nla_ok(const struct nlattr *nla, int remaining)
+{
+ return remaining >= sizeof(*nla) &&
+ nla->nla_len >= sizeof(*nla) &&
+ nla->nla_len <= remaining;
+}
+
+static void *nla_data(const struct nlattr *nla)
+{
+ return (char *) nla + NLA_HDRLEN;
+}
+
+static int nla_type(const struct nlattr *nla)
+{
+ return nla->nla_type & NLA_TYPE_MASK;
+}
+
+static int validate_nla(struct nlattr *nla, int maxtype,
+ struct nla_policy *policy)
+{
+ struct nla_policy *pt;
+ unsigned int minlen = 0;
+ int type = nla_type(nla);
+
+ if (type < 0 || type > maxtype)
+ return 0;
+
+ pt = [type];
+
+ if (pt->type > NLA_TYPE_MAX)
+ return 0;
+
+ if (pt->minlen)
+ minlen = pt->minlen;
+ else if (pt->type != NLA_UNSPEC)
+ minlen = nla_attr_minlen[pt->type];
+
+ if (nla_len(nla) < minlen)
+ return -1;
+
+ if (pt->maxlen && nla_len(nla) > pt->maxlen)
+
[PATCH bpf-next v6 1/4] libbpf: add function to setup XDP
Most of the code is taken from set_link_xdp_fd() in bpf_load.c and
slightly modified to be library compliant.
Signed-off-by: Eric Leblond <e...@regit.org>
Acked-by: Alexei Starovoitov <a...@kernel.org>
---
tools/lib/bpf/bpf.c| 126 +
tools/lib/bpf/libbpf.c | 2 +
tools/lib/bpf/libbpf.h | 4 ++
3 files changed, 132 insertions(+)
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index 5128677e4117..e6c61035b64c 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -25,6 +25,16 @@
#include
#include
#include "bpf.h"
+#include "libbpf.h"
+#include
+#include
+#include
+
+#ifndef IFLA_XDP_MAX
+#define IFLA_XDP 43
+#define IFLA_XDP_FD1
+#define IFLA_XDP_FLAGS 3
+#endif
/*
* When building perf, unistd.h is overridden. __NR_bpf is
@@ -46,7 +56,9 @@
# endif
#endif
+#ifndef min
#define min(x, y) ((x) < (y) ? (x) : (y))
+#endif
static inline __u64 ptr_to_u64(const void *ptr)
{
@@ -413,3 +425,117 @@ int bpf_obj_get_info_by_fd(int prog_fd, void *info, __u32
*info_len)
return err;
}
+
+int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
+{
+ struct sockaddr_nl sa;
+ int sock, seq = 0, len, ret = -1;
+ char buf[4096];
+ struct nlattr *nla, *nla_xdp;
+ struct {
+ struct nlmsghdr nh;
+ struct ifinfomsg ifinfo;
+ char attrbuf[64];
+ } req;
+ struct nlmsghdr *nh;
+ struct nlmsgerr *err;
+ socklen_t addrlen;
+
+ memset(, 0, sizeof(sa));
+ sa.nl_family = AF_NETLINK;
+
+ sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
+ if (sock < 0) {
+ return -errno;
+ }
+
+ if (bind(sock, (struct sockaddr *), sizeof(sa)) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ addrlen = sizeof(sa);
+ if (getsockname(sock, (struct sockaddr *), ) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ if (addrlen != sizeof(sa)) {
+ ret = -LIBBPF_ERRNO__INTERNAL;
+ goto cleanup;
+ }
+
+ memset(, 0, sizeof(req));
+ req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
+ req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
+ req.nh.nlmsg_type = RTM_SETLINK;
+ req.nh.nlmsg_pid = 0;
+ req.nh.nlmsg_seq = ++seq;
+ req.ifinfo.ifi_family = AF_UNSPEC;
+ req.ifinfo.ifi_index = ifindex;
+
+ /* started nested attribute for XDP */
+ nla = (struct nlattr *)(((char *))
+ + NLMSG_ALIGN(req.nh.nlmsg_len));
+ nla->nla_type = NLA_F_NESTED | IFLA_XDP;
+ nla->nla_len = NLA_HDRLEN;
+
+ /* add XDP fd */
+ nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
+ nla_xdp->nla_type = IFLA_XDP_FD;
+ nla_xdp->nla_len = NLA_HDRLEN + sizeof(int);
+ memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(fd));
+ nla->nla_len += nla_xdp->nla_len;
+
+ /* if user passed in any flags, add those too */
+ if (flags) {
+ nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
+ nla_xdp->nla_type = IFLA_XDP_FLAGS;
+ nla_xdp->nla_len = NLA_HDRLEN + sizeof(flags);
+ memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(flags));
+ nla->nla_len += nla_xdp->nla_len;
+ }
+
+ req.nh.nlmsg_len += NLA_ALIGN(nla->nla_len);
+
+ if (send(sock, , req.nh.nlmsg_len, 0) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ len = recv(sock, buf, sizeof(buf), 0);
+ if (len < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ for (nh = (struct nlmsghdr *)buf; NLMSG_OK(nh, len);
+nh = NLMSG_NEXT(nh, len)) {
+ if (nh->nlmsg_pid != sa.nl_pid) {
+ ret = -LIBBPF_ERRNO__WRNGPID;
+ goto cleanup;
+ }
+ if (nh->nlmsg_seq != seq) {
+ ret = -LIBBPF_ERRNO__INVSEQ;
+ goto cleanup;
+ }
+ switch (nh->nlmsg_type) {
+ case NLMSG_ERROR:
+ err = (struct nlmsgerr *)NLMSG_DATA(nh);
+ if (!err->error)
+ continue;
+ ret = err->error;
+ goto cleanup;
+ case NLMSG_DONE:
+ break;
+ default:
+ break;
+ }
+ }
+
+ ret = 0;
+
+cleanup:
+ close(sock);
+ return ret;
+}
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 30c776375118..c60122d3ea85 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -106,6 +106,8 @@ static co
[PATCH bpf-next 0/4] libbpf: add XDP binding support
Hello, This patchset rebases the libbpf code on latest bpf-next code and addresses remarks by Daniel. Best regards, -- Eric Leblond
[PATCH bpf-next v6 1/4] libbpf: add function to setup XDP
Most of the code is taken from set_link_xdp_fd() in bpf_load.c and
slightly modified to be library compliant.
Signed-off-by: Eric Leblond
Acked-by: Alexei Starovoitov
---
tools/lib/bpf/bpf.c| 126 +
tools/lib/bpf/libbpf.c | 2 +
tools/lib/bpf/libbpf.h | 4 ++
3 files changed, 132 insertions(+)
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index 5128677e4117..e6c61035b64c 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -25,6 +25,16 @@
#include
#include
#include "bpf.h"
+#include "libbpf.h"
+#include
+#include
+#include
+
+#ifndef IFLA_XDP_MAX
+#define IFLA_XDP 43
+#define IFLA_XDP_FD1
+#define IFLA_XDP_FLAGS 3
+#endif
/*
* When building perf, unistd.h is overridden. __NR_bpf is
@@ -46,7 +56,9 @@
# endif
#endif
+#ifndef min
#define min(x, y) ((x) < (y) ? (x) : (y))
+#endif
static inline __u64 ptr_to_u64(const void *ptr)
{
@@ -413,3 +425,117 @@ int bpf_obj_get_info_by_fd(int prog_fd, void *info, __u32
*info_len)
return err;
}
+
+int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
+{
+ struct sockaddr_nl sa;
+ int sock, seq = 0, len, ret = -1;
+ char buf[4096];
+ struct nlattr *nla, *nla_xdp;
+ struct {
+ struct nlmsghdr nh;
+ struct ifinfomsg ifinfo;
+ char attrbuf[64];
+ } req;
+ struct nlmsghdr *nh;
+ struct nlmsgerr *err;
+ socklen_t addrlen;
+
+ memset(, 0, sizeof(sa));
+ sa.nl_family = AF_NETLINK;
+
+ sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
+ if (sock < 0) {
+ return -errno;
+ }
+
+ if (bind(sock, (struct sockaddr *), sizeof(sa)) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ addrlen = sizeof(sa);
+ if (getsockname(sock, (struct sockaddr *), ) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ if (addrlen != sizeof(sa)) {
+ ret = -LIBBPF_ERRNO__INTERNAL;
+ goto cleanup;
+ }
+
+ memset(, 0, sizeof(req));
+ req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
+ req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
+ req.nh.nlmsg_type = RTM_SETLINK;
+ req.nh.nlmsg_pid = 0;
+ req.nh.nlmsg_seq = ++seq;
+ req.ifinfo.ifi_family = AF_UNSPEC;
+ req.ifinfo.ifi_index = ifindex;
+
+ /* started nested attribute for XDP */
+ nla = (struct nlattr *)(((char *))
+ + NLMSG_ALIGN(req.nh.nlmsg_len));
+ nla->nla_type = NLA_F_NESTED | IFLA_XDP;
+ nla->nla_len = NLA_HDRLEN;
+
+ /* add XDP fd */
+ nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
+ nla_xdp->nla_type = IFLA_XDP_FD;
+ nla_xdp->nla_len = NLA_HDRLEN + sizeof(int);
+ memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(fd));
+ nla->nla_len += nla_xdp->nla_len;
+
+ /* if user passed in any flags, add those too */
+ if (flags) {
+ nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
+ nla_xdp->nla_type = IFLA_XDP_FLAGS;
+ nla_xdp->nla_len = NLA_HDRLEN + sizeof(flags);
+ memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(flags));
+ nla->nla_len += nla_xdp->nla_len;
+ }
+
+ req.nh.nlmsg_len += NLA_ALIGN(nla->nla_len);
+
+ if (send(sock, , req.nh.nlmsg_len, 0) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ len = recv(sock, buf, sizeof(buf), 0);
+ if (len < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ for (nh = (struct nlmsghdr *)buf; NLMSG_OK(nh, len);
+nh = NLMSG_NEXT(nh, len)) {
+ if (nh->nlmsg_pid != sa.nl_pid) {
+ ret = -LIBBPF_ERRNO__WRNGPID;
+ goto cleanup;
+ }
+ if (nh->nlmsg_seq != seq) {
+ ret = -LIBBPF_ERRNO__INVSEQ;
+ goto cleanup;
+ }
+ switch (nh->nlmsg_type) {
+ case NLMSG_ERROR:
+ err = (struct nlmsgerr *)NLMSG_DATA(nh);
+ if (!err->error)
+ continue;
+ ret = err->error;
+ goto cleanup;
+ case NLMSG_DONE:
+ break;
+ default:
+ break;
+ }
+ }
+
+ ret = 0;
+
+cleanup:
+ close(sock);
+ return ret;
+}
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 30c776375118..c60122d3ea85 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -106,6 +106,8 @@ static const char *libbpf_strerror_table[NR_ERRNO] =
[PATCH bpf-next 0/4] libbpf: add XDP binding support
Hello, This patchset rebases the libbpf code on latest bpf-next code and addresses remarks by Daniel. Best regards, -- Eric Leblond
[PATCH bpf-next v6 4/4] samples/bpf: use bpf_set_link_xdp_fd
Use bpf_set_link_xdp_fd instead of set_link_xdp_fd to remove some
code duplication and benefit of netlink ext ack errors message.
Signed-off-by: Eric Leblond <e...@regit.org>
---
samples/bpf/bpf_load.c | 102
samples/bpf/bpf_load.h | 2 +-
samples/bpf/xdp1_user.c | 4 +-
samples/bpf/xdp_redirect_cpu_user.c | 6 +--
samples/bpf/xdp_redirect_map_user.c | 8 +--
samples/bpf/xdp_redirect_user.c | 8 +--
samples/bpf/xdp_router_ipv4_user.c | 10 ++--
samples/bpf/xdp_tx_iptunnel_user.c | 6 +--
8 files changed, 22 insertions(+), 124 deletions(-)
diff --git a/samples/bpf/bpf_load.c b/samples/bpf/bpf_load.c
index 242631aa4ea2..69806d74fa53 100644
--- a/samples/bpf/bpf_load.c
+++ b/samples/bpf/bpf_load.c
@@ -695,105 +695,3 @@ struct ksym *ksym_search(long key)
return [0];
}
-int set_link_xdp_fd(int ifindex, int fd, __u32 flags)
-{
- struct sockaddr_nl sa;
- int sock, seq = 0, len, ret = -1;
- char buf[4096];
- struct nlattr *nla, *nla_xdp;
- struct {
- struct nlmsghdr nh;
- struct ifinfomsg ifinfo;
- char attrbuf[64];
- } req;
- struct nlmsghdr *nh;
- struct nlmsgerr *err;
-
- memset(, 0, sizeof(sa));
- sa.nl_family = AF_NETLINK;
-
- sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
- if (sock < 0) {
- printf("open netlink socket: %s\n", strerror(errno));
- return -1;
- }
-
- if (bind(sock, (struct sockaddr *), sizeof(sa)) < 0) {
- printf("bind to netlink: %s\n", strerror(errno));
- goto cleanup;
- }
-
- memset(, 0, sizeof(req));
- req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
- req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
- req.nh.nlmsg_type = RTM_SETLINK;
- req.nh.nlmsg_pid = 0;
- req.nh.nlmsg_seq = ++seq;
- req.ifinfo.ifi_family = AF_UNSPEC;
- req.ifinfo.ifi_index = ifindex;
-
- /* started nested attribute for XDP */
- nla = (struct nlattr *)(((char *))
- + NLMSG_ALIGN(req.nh.nlmsg_len));
- nla->nla_type = NLA_F_NESTED | 43/*IFLA_XDP*/;
- nla->nla_len = NLA_HDRLEN;
-
- /* add XDP fd */
- nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
- nla_xdp->nla_type = 1/*IFLA_XDP_FD*/;
- nla_xdp->nla_len = NLA_HDRLEN + sizeof(int);
- memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(fd));
- nla->nla_len += nla_xdp->nla_len;
-
- /* if user passed in any flags, add those too */
- if (flags) {
- nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
- nla_xdp->nla_type = 3/*IFLA_XDP_FLAGS*/;
- nla_xdp->nla_len = NLA_HDRLEN + sizeof(flags);
- memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(flags));
- nla->nla_len += nla_xdp->nla_len;
- }
-
- req.nh.nlmsg_len += NLA_ALIGN(nla->nla_len);
-
- if (send(sock, , req.nh.nlmsg_len, 0) < 0) {
- printf("send to netlink: %s\n", strerror(errno));
- goto cleanup;
- }
-
- len = recv(sock, buf, sizeof(buf), 0);
- if (len < 0) {
- printf("recv from netlink: %s\n", strerror(errno));
- goto cleanup;
- }
-
- for (nh = (struct nlmsghdr *)buf; NLMSG_OK(nh, len);
-nh = NLMSG_NEXT(nh, len)) {
- if (nh->nlmsg_pid != getpid()) {
- printf("Wrong pid %d, expected %d\n",
- nh->nlmsg_pid, getpid());
- goto cleanup;
- }
- if (nh->nlmsg_seq != seq) {
- printf("Wrong seq %d, expected %d\n",
- nh->nlmsg_seq, seq);
- goto cleanup;
- }
- switch (nh->nlmsg_type) {
- case NLMSG_ERROR:
- err = (struct nlmsgerr *)NLMSG_DATA(nh);
- if (!err->error)
- continue;
- printf("nlmsg error %s\n", strerror(-err->error));
- goto cleanup;
- case NLMSG_DONE:
- break;
- }
- }
-
- ret = 0;
-
-cleanup:
- close(sock);
- return ret;
-}
diff --git a/samples/bpf/bpf_load.h b/samples/bpf/bpf_load.h
index 7d57a4248893..453c200b389b 100644
--- a/samples/bpf/bpf_load.h
+++ b/samples/bpf/bpf_load.h
@@ -61,5 +61,5 @@ struct ksym {
int load_kallsyms(void);
struct ksym *ksym_search(long key);
-int set_link_xdp_fd(int ifindex, int fd, __u32 flags);
+int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags);
#endif
di
[PATCH bpf-next v6 4/4] samples/bpf: use bpf_set_link_xdp_fd
Use bpf_set_link_xdp_fd instead of set_link_xdp_fd to remove some
code duplication and benefit of netlink ext ack errors message.
Signed-off-by: Eric Leblond
---
samples/bpf/bpf_load.c | 102
samples/bpf/bpf_load.h | 2 +-
samples/bpf/xdp1_user.c | 4 +-
samples/bpf/xdp_redirect_cpu_user.c | 6 +--
samples/bpf/xdp_redirect_map_user.c | 8 +--
samples/bpf/xdp_redirect_user.c | 8 +--
samples/bpf/xdp_router_ipv4_user.c | 10 ++--
samples/bpf/xdp_tx_iptunnel_user.c | 6 +--
8 files changed, 22 insertions(+), 124 deletions(-)
diff --git a/samples/bpf/bpf_load.c b/samples/bpf/bpf_load.c
index 242631aa4ea2..69806d74fa53 100644
--- a/samples/bpf/bpf_load.c
+++ b/samples/bpf/bpf_load.c
@@ -695,105 +695,3 @@ struct ksym *ksym_search(long key)
return [0];
}
-int set_link_xdp_fd(int ifindex, int fd, __u32 flags)
-{
- struct sockaddr_nl sa;
- int sock, seq = 0, len, ret = -1;
- char buf[4096];
- struct nlattr *nla, *nla_xdp;
- struct {
- struct nlmsghdr nh;
- struct ifinfomsg ifinfo;
- char attrbuf[64];
- } req;
- struct nlmsghdr *nh;
- struct nlmsgerr *err;
-
- memset(, 0, sizeof(sa));
- sa.nl_family = AF_NETLINK;
-
- sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
- if (sock < 0) {
- printf("open netlink socket: %s\n", strerror(errno));
- return -1;
- }
-
- if (bind(sock, (struct sockaddr *), sizeof(sa)) < 0) {
- printf("bind to netlink: %s\n", strerror(errno));
- goto cleanup;
- }
-
- memset(, 0, sizeof(req));
- req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
- req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
- req.nh.nlmsg_type = RTM_SETLINK;
- req.nh.nlmsg_pid = 0;
- req.nh.nlmsg_seq = ++seq;
- req.ifinfo.ifi_family = AF_UNSPEC;
- req.ifinfo.ifi_index = ifindex;
-
- /* started nested attribute for XDP */
- nla = (struct nlattr *)(((char *))
- + NLMSG_ALIGN(req.nh.nlmsg_len));
- nla->nla_type = NLA_F_NESTED | 43/*IFLA_XDP*/;
- nla->nla_len = NLA_HDRLEN;
-
- /* add XDP fd */
- nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
- nla_xdp->nla_type = 1/*IFLA_XDP_FD*/;
- nla_xdp->nla_len = NLA_HDRLEN + sizeof(int);
- memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(fd));
- nla->nla_len += nla_xdp->nla_len;
-
- /* if user passed in any flags, add those too */
- if (flags) {
- nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
- nla_xdp->nla_type = 3/*IFLA_XDP_FLAGS*/;
- nla_xdp->nla_len = NLA_HDRLEN + sizeof(flags);
- memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(flags));
- nla->nla_len += nla_xdp->nla_len;
- }
-
- req.nh.nlmsg_len += NLA_ALIGN(nla->nla_len);
-
- if (send(sock, , req.nh.nlmsg_len, 0) < 0) {
- printf("send to netlink: %s\n", strerror(errno));
- goto cleanup;
- }
-
- len = recv(sock, buf, sizeof(buf), 0);
- if (len < 0) {
- printf("recv from netlink: %s\n", strerror(errno));
- goto cleanup;
- }
-
- for (nh = (struct nlmsghdr *)buf; NLMSG_OK(nh, len);
-nh = NLMSG_NEXT(nh, len)) {
- if (nh->nlmsg_pid != getpid()) {
- printf("Wrong pid %d, expected %d\n",
- nh->nlmsg_pid, getpid());
- goto cleanup;
- }
- if (nh->nlmsg_seq != seq) {
- printf("Wrong seq %d, expected %d\n",
- nh->nlmsg_seq, seq);
- goto cleanup;
- }
- switch (nh->nlmsg_type) {
- case NLMSG_ERROR:
- err = (struct nlmsgerr *)NLMSG_DATA(nh);
- if (!err->error)
- continue;
- printf("nlmsg error %s\n", strerror(-err->error));
- goto cleanup;
- case NLMSG_DONE:
- break;
- }
- }
-
- ret = 0;
-
-cleanup:
- close(sock);
- return ret;
-}
diff --git a/samples/bpf/bpf_load.h b/samples/bpf/bpf_load.h
index 7d57a4248893..453c200b389b 100644
--- a/samples/bpf/bpf_load.h
+++ b/samples/bpf/bpf_load.h
@@ -61,5 +61,5 @@ struct ksym {
int load_kallsyms(void);
struct ksym *ksym_search(long key);
-int set_link_xdp_fd(int ifindex, int fd, __u32 flags);
+int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags);
#endif
diff --git a/samples/bpf/xdp1
[PATCH bpf-next v6 3/4] libbpf: add missing SPDX-License-Identifier
Signed-off-by: Eric Leblond <e...@regit.org> Acked-by: Alexei Starovoitov <a...@kernel.org> --- tools/lib/bpf/bpf.c| 2 ++ tools/lib/bpf/bpf.h| 2 ++ tools/lib/bpf/libbpf.c | 2 ++ tools/lib/bpf/libbpf.h | 2 ++ 4 files changed, 8 insertions(+) diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c index 4517dce6849d..991bd72c4153 100644 --- a/tools/lib/bpf/bpf.c +++ b/tools/lib/bpf/bpf.c @@ -1,3 +1,5 @@ +// SPDX-License-Identifier: LGPL-2.1 + /* * common eBPF ELF operations. * diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h index 9f44c196931e..8d18fb73d7fb 100644 --- a/tools/lib/bpf/bpf.h +++ b/tools/lib/bpf/bpf.h @@ -1,3 +1,5 @@ +/* SPDX-License-Identifier: LGPL-2.1 */ + /* * common eBPF ELF operations. * diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index c60122d3ea85..71ddc481f349 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -1,3 +1,5 @@ +// SPDX-License-Identifier: LGPL-2.1 + /* * Common eBPF ELF object loading operations. * diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h index e42f96900318..f85906533cdd 100644 --- a/tools/lib/bpf/libbpf.h +++ b/tools/lib/bpf/libbpf.h @@ -1,3 +1,5 @@ +/* SPDX-License-Identifier: LGPL-2.1 */ + /* * Common eBPF ELF object loading operations. * -- 2.15.1
[PATCH bpf-next v6 3/4] libbpf: add missing SPDX-License-Identifier
Signed-off-by: Eric Leblond Acked-by: Alexei Starovoitov --- tools/lib/bpf/bpf.c| 2 ++ tools/lib/bpf/bpf.h| 2 ++ tools/lib/bpf/libbpf.c | 2 ++ tools/lib/bpf/libbpf.h | 2 ++ 4 files changed, 8 insertions(+) diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c index 4517dce6849d..991bd72c4153 100644 --- a/tools/lib/bpf/bpf.c +++ b/tools/lib/bpf/bpf.c @@ -1,3 +1,5 @@ +// SPDX-License-Identifier: LGPL-2.1 + /* * common eBPF ELF operations. * diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h index 9f44c196931e..8d18fb73d7fb 100644 --- a/tools/lib/bpf/bpf.h +++ b/tools/lib/bpf/bpf.h @@ -1,3 +1,5 @@ +/* SPDX-License-Identifier: LGPL-2.1 */ + /* * common eBPF ELF operations. * diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index c60122d3ea85..71ddc481f349 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -1,3 +1,5 @@ +// SPDX-License-Identifier: LGPL-2.1 + /* * Common eBPF ELF object loading operations. * diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h index e42f96900318..f85906533cdd 100644 --- a/tools/lib/bpf/libbpf.h +++ b/tools/lib/bpf/libbpf.h @@ -1,3 +1,5 @@ +/* SPDX-License-Identifier: LGPL-2.1 */ + /* * Common eBPF ELF object loading operations. * -- 2.15.1
Re: [PATCH bpf-next v5 2/4] libbpf: add error reporting in XDP
Hi,
Sorry for the delay, missed the mail.
On Sat, 2018-01-06 at 22:16 +0100, Daniel Borkmann wrote:
> On 01/04/2018 09:21 AM, Eric Leblond wrote:
> > Parse netlink ext attribute to get the error message returned by
> > the card. Code is partially take from libnl.
> >
> > Signed-off-by: Eric Leblond <e...@regit.org>
> > Acked-by: Alexei Starovoitov <a...@kernel.org>
> > ---
> > samples/bpf/Makefile | 2 +-
> > tools/lib/bpf/Build| 2 +-
> > tools/lib/bpf/bpf.c| 10 ++-
> > tools/lib/bpf/nlattr.c | 187
> > +
> > tools/lib/bpf/nlattr.h | 70 ++
> > 5 files changed, 268 insertions(+), 3 deletions(-)
> > create mode 100644 tools/lib/bpf/nlattr.c
> > create mode 100644 tools/lib/bpf/nlattr.h
> >
> > diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
> > index 4fb944a7ecf8..c889ebcba9b3 100644
> > --- a/samples/bpf/Makefile
> > +++ b/samples/bpf/Makefile
> > @@ -44,7 +44,7 @@ hostprogs-y += xdp_monitor
> > hostprogs-y += syscall_tp
> >
> > # Libbpf dependencies
> > -LIBBPF := ../../tools/lib/bpf/bpf.o
> > +LIBBPF := ../../tools/lib/bpf/bpf.o ../../tools/lib/bpf/nlattr.o
> > CGROUP_HELPERS :=
> > ../../tools/testing/selftests/bpf/cgroup_helpers.o
> >
> > test_lru_dist-objs := test_lru_dist.o $(LIBBPF)
> > diff --git a/tools/lib/bpf/Build b/tools/lib/bpf/Build
> > index d8749756352d..64c679d67109 100644
> > --- a/tools/lib/bpf/Build
> > +++ b/tools/lib/bpf/Build
> > @@ -1 +1 @@
> > -libbpf-y := libbpf.o bpf.o
> > +libbpf-y := libbpf.o bpf.o nlattr.o
> > diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
> > index e6c61035b64c..10d71b9fdbd0 100644
> > --- a/tools/lib/bpf/bpf.c
> > +++ b/tools/lib/bpf/bpf.c
> > @@ -26,6 +26,7 @@
> > #include
> > #include "bpf.h"
> > #include "libbpf.h"
> > +#include "nlattr.h"
> > #include
> > #include
> > #include
> > @@ -440,6 +441,7 @@ int bpf_set_link_xdp_fd(int ifindex, int fd,
> > __u32 flags)
> > struct nlmsghdr *nh;
> > struct nlmsgerr *err;
> > socklen_t addrlen;
> > + int one;
>
> Hmm, it's not initialized here to 1 ...
>
> > memset(, 0, sizeof(sa));
> > sa.nl_family = AF_NETLINK;
> > @@ -449,6 +451,11 @@ int bpf_set_link_xdp_fd(int ifindex, int fd,
> > __u32 flags)
> > return -errno;
> > }
> >
> > + if (setsockopt(sock, SOL_NETLINK, NETLINK_EXT_ACK,
> > + , sizeof(one)) < 0) {
>
> ... so we turn it on by chance here.
Indeed, fixing that.
> > + fprintf(stderr, "Netlink error reporting not
> > supported\n");
> > + }
> > +
> > if (bind(sock, (struct sockaddr *), sizeof(sa)) < 0) {
> > ret = -errno;
> > goto cleanup;
> > @@ -524,7 +531,8 @@ int bpf_set_link_xdp_fd(int ifindex, int fd,
> > __u32 flags)
> > err = (struct nlmsgerr *)NLMSG_DATA(nh);
> > if (!err->error)
> > continue;
> > - ret = err->error;
> > + ret = -err->error;
>
> This one looks strange. Your prior patch added the 'ret = err->error'
> and this one negates it. Which variant is the correct version? From
> digging into the kernel code, my take is that 'ret = err->error' was
> the correct variant since it already holds the negative error code.
> Could you double check?
Yes all netlink_ack usage I have seen are using the negative value of
the error. Fixing that too.
BR,
--
Eric Leblond <e...@regit.org>
Blog: https://home.regit.org/
Re: [PATCH bpf-next v5 2/4] libbpf: add error reporting in XDP
Hi,
Sorry for the delay, missed the mail.
On Sat, 2018-01-06 at 22:16 +0100, Daniel Borkmann wrote:
> On 01/04/2018 09:21 AM, Eric Leblond wrote:
> > Parse netlink ext attribute to get the error message returned by
> > the card. Code is partially take from libnl.
> >
> > Signed-off-by: Eric Leblond
> > Acked-by: Alexei Starovoitov
> > ---
> > samples/bpf/Makefile | 2 +-
> > tools/lib/bpf/Build| 2 +-
> > tools/lib/bpf/bpf.c| 10 ++-
> > tools/lib/bpf/nlattr.c | 187
> > +
> > tools/lib/bpf/nlattr.h | 70 ++
> > 5 files changed, 268 insertions(+), 3 deletions(-)
> > create mode 100644 tools/lib/bpf/nlattr.c
> > create mode 100644 tools/lib/bpf/nlattr.h
> >
> > diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
> > index 4fb944a7ecf8..c889ebcba9b3 100644
> > --- a/samples/bpf/Makefile
> > +++ b/samples/bpf/Makefile
> > @@ -44,7 +44,7 @@ hostprogs-y += xdp_monitor
> > hostprogs-y += syscall_tp
> >
> > # Libbpf dependencies
> > -LIBBPF := ../../tools/lib/bpf/bpf.o
> > +LIBBPF := ../../tools/lib/bpf/bpf.o ../../tools/lib/bpf/nlattr.o
> > CGROUP_HELPERS :=
> > ../../tools/testing/selftests/bpf/cgroup_helpers.o
> >
> > test_lru_dist-objs := test_lru_dist.o $(LIBBPF)
> > diff --git a/tools/lib/bpf/Build b/tools/lib/bpf/Build
> > index d8749756352d..64c679d67109 100644
> > --- a/tools/lib/bpf/Build
> > +++ b/tools/lib/bpf/Build
> > @@ -1 +1 @@
> > -libbpf-y := libbpf.o bpf.o
> > +libbpf-y := libbpf.o bpf.o nlattr.o
> > diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
> > index e6c61035b64c..10d71b9fdbd0 100644
> > --- a/tools/lib/bpf/bpf.c
> > +++ b/tools/lib/bpf/bpf.c
> > @@ -26,6 +26,7 @@
> > #include
> > #include "bpf.h"
> > #include "libbpf.h"
> > +#include "nlattr.h"
> > #include
> > #include
> > #include
> > @@ -440,6 +441,7 @@ int bpf_set_link_xdp_fd(int ifindex, int fd,
> > __u32 flags)
> > struct nlmsghdr *nh;
> > struct nlmsgerr *err;
> > socklen_t addrlen;
> > + int one;
>
> Hmm, it's not initialized here to 1 ...
>
> > memset(, 0, sizeof(sa));
> > sa.nl_family = AF_NETLINK;
> > @@ -449,6 +451,11 @@ int bpf_set_link_xdp_fd(int ifindex, int fd,
> > __u32 flags)
> > return -errno;
> > }
> >
> > + if (setsockopt(sock, SOL_NETLINK, NETLINK_EXT_ACK,
> > + , sizeof(one)) < 0) {
>
> ... so we turn it on by chance here.
Indeed, fixing that.
> > + fprintf(stderr, "Netlink error reporting not
> > supported\n");
> > + }
> > +
> > if (bind(sock, (struct sockaddr *), sizeof(sa)) < 0) {
> > ret = -errno;
> > goto cleanup;
> > @@ -524,7 +531,8 @@ int bpf_set_link_xdp_fd(int ifindex, int fd,
> > __u32 flags)
> > err = (struct nlmsgerr *)NLMSG_DATA(nh);
> > if (!err->error)
> > continue;
> > - ret = err->error;
> > + ret = -err->error;
>
> This one looks strange. Your prior patch added the 'ret = err->error'
> and this one negates it. Which variant is the correct version? From
> digging into the kernel code, my take is that 'ret = err->error' was
> the correct variant since it already holds the negative error code.
> Could you double check?
Yes all netlink_ack usage I have seen are using the negative value of
the error. Fixing that too.
BR,
--
Eric Leblond
Blog: https://home.regit.org/
[PATCH bpf-next v5 4/4] samples/bpf: use bpf_set_link_xdp_fd
Use bpf_set_link_xdp_fd instead of set_link_xdp_fd to remove some
code duplication and benefit of netlink ext ack errors message.
Signed-off-by: Eric Leblond <e...@regit.org>
---
samples/bpf/bpf_load.c | 102
samples/bpf/bpf_load.h | 2 +-
samples/bpf/xdp1_user.c | 4 +-
samples/bpf/xdp_redirect_cpu_user.c | 6 +--
samples/bpf/xdp_redirect_map_user.c | 8 +--
samples/bpf/xdp_redirect_user.c | 8 +--
samples/bpf/xdp_router_ipv4_user.c | 10 ++--
samples/bpf/xdp_tx_iptunnel_user.c | 6 +--
8 files changed, 22 insertions(+), 124 deletions(-)
diff --git a/samples/bpf/bpf_load.c b/samples/bpf/bpf_load.c
index 242631aa4ea2..69806d74fa53 100644
--- a/samples/bpf/bpf_load.c
+++ b/samples/bpf/bpf_load.c
@@ -695,105 +695,3 @@ struct ksym *ksym_search(long key)
return [0];
}
-int set_link_xdp_fd(int ifindex, int fd, __u32 flags)
-{
- struct sockaddr_nl sa;
- int sock, seq = 0, len, ret = -1;
- char buf[4096];
- struct nlattr *nla, *nla_xdp;
- struct {
- struct nlmsghdr nh;
- struct ifinfomsg ifinfo;
- char attrbuf[64];
- } req;
- struct nlmsghdr *nh;
- struct nlmsgerr *err;
-
- memset(, 0, sizeof(sa));
- sa.nl_family = AF_NETLINK;
-
- sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
- if (sock < 0) {
- printf("open netlink socket: %s\n", strerror(errno));
- return -1;
- }
-
- if (bind(sock, (struct sockaddr *), sizeof(sa)) < 0) {
- printf("bind to netlink: %s\n", strerror(errno));
- goto cleanup;
- }
-
- memset(, 0, sizeof(req));
- req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
- req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
- req.nh.nlmsg_type = RTM_SETLINK;
- req.nh.nlmsg_pid = 0;
- req.nh.nlmsg_seq = ++seq;
- req.ifinfo.ifi_family = AF_UNSPEC;
- req.ifinfo.ifi_index = ifindex;
-
- /* started nested attribute for XDP */
- nla = (struct nlattr *)(((char *))
- + NLMSG_ALIGN(req.nh.nlmsg_len));
- nla->nla_type = NLA_F_NESTED | 43/*IFLA_XDP*/;
- nla->nla_len = NLA_HDRLEN;
-
- /* add XDP fd */
- nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
- nla_xdp->nla_type = 1/*IFLA_XDP_FD*/;
- nla_xdp->nla_len = NLA_HDRLEN + sizeof(int);
- memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(fd));
- nla->nla_len += nla_xdp->nla_len;
-
- /* if user passed in any flags, add those too */
- if (flags) {
- nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
- nla_xdp->nla_type = 3/*IFLA_XDP_FLAGS*/;
- nla_xdp->nla_len = NLA_HDRLEN + sizeof(flags);
- memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(flags));
- nla->nla_len += nla_xdp->nla_len;
- }
-
- req.nh.nlmsg_len += NLA_ALIGN(nla->nla_len);
-
- if (send(sock, , req.nh.nlmsg_len, 0) < 0) {
- printf("send to netlink: %s\n", strerror(errno));
- goto cleanup;
- }
-
- len = recv(sock, buf, sizeof(buf), 0);
- if (len < 0) {
- printf("recv from netlink: %s\n", strerror(errno));
- goto cleanup;
- }
-
- for (nh = (struct nlmsghdr *)buf; NLMSG_OK(nh, len);
-nh = NLMSG_NEXT(nh, len)) {
- if (nh->nlmsg_pid != getpid()) {
- printf("Wrong pid %d, expected %d\n",
- nh->nlmsg_pid, getpid());
- goto cleanup;
- }
- if (nh->nlmsg_seq != seq) {
- printf("Wrong seq %d, expected %d\n",
- nh->nlmsg_seq, seq);
- goto cleanup;
- }
- switch (nh->nlmsg_type) {
- case NLMSG_ERROR:
- err = (struct nlmsgerr *)NLMSG_DATA(nh);
- if (!err->error)
- continue;
- printf("nlmsg error %s\n", strerror(-err->error));
- goto cleanup;
- case NLMSG_DONE:
- break;
- }
- }
-
- ret = 0;
-
-cleanup:
- close(sock);
- return ret;
-}
diff --git a/samples/bpf/bpf_load.h b/samples/bpf/bpf_load.h
index 7d57a4248893..453c200b389b 100644
--- a/samples/bpf/bpf_load.h
+++ b/samples/bpf/bpf_load.h
@@ -61,5 +61,5 @@ struct ksym {
int load_kallsyms(void);
struct ksym *ksym_search(long key);
-int set_link_xdp_fd(int ifindex, int fd, __u32 flags);
+int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags);
#endif
di
[PATCH bpf-next v5 4/4] samples/bpf: use bpf_set_link_xdp_fd
Use bpf_set_link_xdp_fd instead of set_link_xdp_fd to remove some
code duplication and benefit of netlink ext ack errors message.
Signed-off-by: Eric Leblond
---
samples/bpf/bpf_load.c | 102
samples/bpf/bpf_load.h | 2 +-
samples/bpf/xdp1_user.c | 4 +-
samples/bpf/xdp_redirect_cpu_user.c | 6 +--
samples/bpf/xdp_redirect_map_user.c | 8 +--
samples/bpf/xdp_redirect_user.c | 8 +--
samples/bpf/xdp_router_ipv4_user.c | 10 ++--
samples/bpf/xdp_tx_iptunnel_user.c | 6 +--
8 files changed, 22 insertions(+), 124 deletions(-)
diff --git a/samples/bpf/bpf_load.c b/samples/bpf/bpf_load.c
index 242631aa4ea2..69806d74fa53 100644
--- a/samples/bpf/bpf_load.c
+++ b/samples/bpf/bpf_load.c
@@ -695,105 +695,3 @@ struct ksym *ksym_search(long key)
return [0];
}
-int set_link_xdp_fd(int ifindex, int fd, __u32 flags)
-{
- struct sockaddr_nl sa;
- int sock, seq = 0, len, ret = -1;
- char buf[4096];
- struct nlattr *nla, *nla_xdp;
- struct {
- struct nlmsghdr nh;
- struct ifinfomsg ifinfo;
- char attrbuf[64];
- } req;
- struct nlmsghdr *nh;
- struct nlmsgerr *err;
-
- memset(, 0, sizeof(sa));
- sa.nl_family = AF_NETLINK;
-
- sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
- if (sock < 0) {
- printf("open netlink socket: %s\n", strerror(errno));
- return -1;
- }
-
- if (bind(sock, (struct sockaddr *), sizeof(sa)) < 0) {
- printf("bind to netlink: %s\n", strerror(errno));
- goto cleanup;
- }
-
- memset(, 0, sizeof(req));
- req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
- req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
- req.nh.nlmsg_type = RTM_SETLINK;
- req.nh.nlmsg_pid = 0;
- req.nh.nlmsg_seq = ++seq;
- req.ifinfo.ifi_family = AF_UNSPEC;
- req.ifinfo.ifi_index = ifindex;
-
- /* started nested attribute for XDP */
- nla = (struct nlattr *)(((char *))
- + NLMSG_ALIGN(req.nh.nlmsg_len));
- nla->nla_type = NLA_F_NESTED | 43/*IFLA_XDP*/;
- nla->nla_len = NLA_HDRLEN;
-
- /* add XDP fd */
- nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
- nla_xdp->nla_type = 1/*IFLA_XDP_FD*/;
- nla_xdp->nla_len = NLA_HDRLEN + sizeof(int);
- memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(fd));
- nla->nla_len += nla_xdp->nla_len;
-
- /* if user passed in any flags, add those too */
- if (flags) {
- nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
- nla_xdp->nla_type = 3/*IFLA_XDP_FLAGS*/;
- nla_xdp->nla_len = NLA_HDRLEN + sizeof(flags);
- memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(flags));
- nla->nla_len += nla_xdp->nla_len;
- }
-
- req.nh.nlmsg_len += NLA_ALIGN(nla->nla_len);
-
- if (send(sock, , req.nh.nlmsg_len, 0) < 0) {
- printf("send to netlink: %s\n", strerror(errno));
- goto cleanup;
- }
-
- len = recv(sock, buf, sizeof(buf), 0);
- if (len < 0) {
- printf("recv from netlink: %s\n", strerror(errno));
- goto cleanup;
- }
-
- for (nh = (struct nlmsghdr *)buf; NLMSG_OK(nh, len);
-nh = NLMSG_NEXT(nh, len)) {
- if (nh->nlmsg_pid != getpid()) {
- printf("Wrong pid %d, expected %d\n",
- nh->nlmsg_pid, getpid());
- goto cleanup;
- }
- if (nh->nlmsg_seq != seq) {
- printf("Wrong seq %d, expected %d\n",
- nh->nlmsg_seq, seq);
- goto cleanup;
- }
- switch (nh->nlmsg_type) {
- case NLMSG_ERROR:
- err = (struct nlmsgerr *)NLMSG_DATA(nh);
- if (!err->error)
- continue;
- printf("nlmsg error %s\n", strerror(-err->error));
- goto cleanup;
- case NLMSG_DONE:
- break;
- }
- }
-
- ret = 0;
-
-cleanup:
- close(sock);
- return ret;
-}
diff --git a/samples/bpf/bpf_load.h b/samples/bpf/bpf_load.h
index 7d57a4248893..453c200b389b 100644
--- a/samples/bpf/bpf_load.h
+++ b/samples/bpf/bpf_load.h
@@ -61,5 +61,5 @@ struct ksym {
int load_kallsyms(void);
struct ksym *ksym_search(long key);
-int set_link_xdp_fd(int ifindex, int fd, __u32 flags);
+int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags);
#endif
diff --git a/samples/bpf/xdp1
[PATCH bpf-next v5 3/4] libbpf: add missing SPDX-License-Identifier
Signed-off-by: Eric Leblond <e...@regit.org> Acked-by: Alexei Starovoitov <a...@kernel.org> --- tools/lib/bpf/bpf.c| 2 ++ tools/lib/bpf/bpf.h| 2 ++ tools/lib/bpf/libbpf.c | 2 ++ tools/lib/bpf/libbpf.h | 2 ++ 4 files changed, 8 insertions(+) diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c index 10d71b9fdbd0..38d720466fe8 100644 --- a/tools/lib/bpf/bpf.c +++ b/tools/lib/bpf/bpf.c @@ -1,3 +1,5 @@ +// SPDX-License-Identifier: LGPL-2.1 + /* * common eBPF ELF operations. * diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h index 9f44c196931e..8d18fb73d7fb 100644 --- a/tools/lib/bpf/bpf.h +++ b/tools/lib/bpf/bpf.h @@ -1,3 +1,5 @@ +/* SPDX-License-Identifier: LGPL-2.1 */ + /* * common eBPF ELF operations. * diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index 5fe8aaa2123e..924a8b8431ab 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -1,3 +1,5 @@ +// SPDX-License-Identifier: LGPL-2.1 + /* * Common eBPF ELF object loading operations. * diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h index e42f96900318..f85906533cdd 100644 --- a/tools/lib/bpf/libbpf.h +++ b/tools/lib/bpf/libbpf.h @@ -1,3 +1,5 @@ +/* SPDX-License-Identifier: LGPL-2.1 */ + /* * Common eBPF ELF object loading operations. * -- 2.15.1
[PATCH bpf-next v5 3/4] libbpf: add missing SPDX-License-Identifier
Signed-off-by: Eric Leblond Acked-by: Alexei Starovoitov --- tools/lib/bpf/bpf.c| 2 ++ tools/lib/bpf/bpf.h| 2 ++ tools/lib/bpf/libbpf.c | 2 ++ tools/lib/bpf/libbpf.h | 2 ++ 4 files changed, 8 insertions(+) diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c index 10d71b9fdbd0..38d720466fe8 100644 --- a/tools/lib/bpf/bpf.c +++ b/tools/lib/bpf/bpf.c @@ -1,3 +1,5 @@ +// SPDX-License-Identifier: LGPL-2.1 + /* * common eBPF ELF operations. * diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h index 9f44c196931e..8d18fb73d7fb 100644 --- a/tools/lib/bpf/bpf.h +++ b/tools/lib/bpf/bpf.h @@ -1,3 +1,5 @@ +/* SPDX-License-Identifier: LGPL-2.1 */ + /* * common eBPF ELF operations. * diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index 5fe8aaa2123e..924a8b8431ab 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -1,3 +1,5 @@ +// SPDX-License-Identifier: LGPL-2.1 + /* * Common eBPF ELF object loading operations. * diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h index e42f96900318..f85906533cdd 100644 --- a/tools/lib/bpf/libbpf.h +++ b/tools/lib/bpf/libbpf.h @@ -1,3 +1,5 @@ +/* SPDX-License-Identifier: LGPL-2.1 */ + /* * Common eBPF ELF object loading operations. * -- 2.15.1
[PATCH bpf-next v5 2/4] libbpf: add error reporting in XDP
Parse netlink ext attribute to get the error message returned by
the card. Code is partially take from libnl.
Signed-off-by: Eric Leblond <e...@regit.org>
Acked-by: Alexei Starovoitov <a...@kernel.org>
---
samples/bpf/Makefile | 2 +-
tools/lib/bpf/Build| 2 +-
tools/lib/bpf/bpf.c| 10 ++-
tools/lib/bpf/nlattr.c | 187 +
tools/lib/bpf/nlattr.h | 70 ++
5 files changed, 268 insertions(+), 3 deletions(-)
create mode 100644 tools/lib/bpf/nlattr.c
create mode 100644 tools/lib/bpf/nlattr.h
diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
index 4fb944a7ecf8..c889ebcba9b3 100644
--- a/samples/bpf/Makefile
+++ b/samples/bpf/Makefile
@@ -44,7 +44,7 @@ hostprogs-y += xdp_monitor
hostprogs-y += syscall_tp
# Libbpf dependencies
-LIBBPF := ../../tools/lib/bpf/bpf.o
+LIBBPF := ../../tools/lib/bpf/bpf.o ../../tools/lib/bpf/nlattr.o
CGROUP_HELPERS := ../../tools/testing/selftests/bpf/cgroup_helpers.o
test_lru_dist-objs := test_lru_dist.o $(LIBBPF)
diff --git a/tools/lib/bpf/Build b/tools/lib/bpf/Build
index d8749756352d..64c679d67109 100644
--- a/tools/lib/bpf/Build
+++ b/tools/lib/bpf/Build
@@ -1 +1 @@
-libbpf-y := libbpf.o bpf.o
+libbpf-y := libbpf.o bpf.o nlattr.o
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index e6c61035b64c..10d71b9fdbd0 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -26,6 +26,7 @@
#include
#include "bpf.h"
#include "libbpf.h"
+#include "nlattr.h"
#include
#include
#include
@@ -440,6 +441,7 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
struct nlmsghdr *nh;
struct nlmsgerr *err;
socklen_t addrlen;
+ int one;
memset(, 0, sizeof(sa));
sa.nl_family = AF_NETLINK;
@@ -449,6 +451,11 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
return -errno;
}
+ if (setsockopt(sock, SOL_NETLINK, NETLINK_EXT_ACK,
+ , sizeof(one)) < 0) {
+ fprintf(stderr, "Netlink error reporting not supported\n");
+ }
+
if (bind(sock, (struct sockaddr *), sizeof(sa)) < 0) {
ret = -errno;
goto cleanup;
@@ -524,7 +531,8 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
err = (struct nlmsgerr *)NLMSG_DATA(nh);
if (!err->error)
continue;
- ret = err->error;
+ ret = -err->error;
+ nla_dump_errormsg(nh);
goto cleanup;
case NLMSG_DONE:
break;
diff --git a/tools/lib/bpf/nlattr.c b/tools/lib/bpf/nlattr.c
new file mode 100644
index ..4719434278b2
--- /dev/null
+++ b/tools/lib/bpf/nlattr.c
@@ -0,0 +1,187 @@
+// SPDX-License-Identifier: LGPL-2.1
+
+/*
+ * NETLINK Netlink attributes
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation version 2.1
+ * of the License.
+ *
+ * Copyright (c) 2003-2013 Thomas Graf <tg...@suug.ch>
+ */
+
+#include
+#include "nlattr.h"
+#include
+#include
+#include
+
+static uint16_t nla_attr_minlen[NLA_TYPE_MAX+1] = {
+ [NLA_U8]= sizeof(uint8_t),
+ [NLA_U16] = sizeof(uint16_t),
+ [NLA_U32] = sizeof(uint32_t),
+ [NLA_U64] = sizeof(uint64_t),
+ [NLA_STRING]= 1,
+ [NLA_FLAG] = 0,
+};
+
+static int nla_len(const struct nlattr *nla)
+{
+ return nla->nla_len - NLA_HDRLEN;
+}
+
+static struct nlattr *nla_next(const struct nlattr *nla, int *remaining)
+{
+ int totlen = NLA_ALIGN(nla->nla_len);
+
+ *remaining -= totlen;
+ return (struct nlattr *) ((char *) nla + totlen);
+}
+
+static int nla_ok(const struct nlattr *nla, int remaining)
+{
+ return remaining >= sizeof(*nla) &&
+ nla->nla_len >= sizeof(*nla) &&
+ nla->nla_len <= remaining;
+}
+
+static void *nla_data(const struct nlattr *nla)
+{
+ return (char *) nla + NLA_HDRLEN;
+}
+
+static int nla_type(const struct nlattr *nla)
+{
+ return nla->nla_type & NLA_TYPE_MASK;
+}
+
+static int validate_nla(struct nlattr *nla, int maxtype,
+ struct nla_policy *policy)
+{
+ struct nla_policy *pt;
+ unsigned int minlen = 0;
+ int type = nla_type(nla);
+
+ if (type < 0 || type > maxtype)
+ return 0;
+
+ pt = [type];
+
+ if (pt->type > NLA_TYPE_MAX)
+ return 0;
+
+ if (pt->minlen)
+ minlen = pt->minlen;
+ else if (pt->type != NLA_UNSPEC)
+ minlen = nla_attr_minlen[pt->
[PATCH bpf-next v5 2/4] libbpf: add error reporting in XDP
Parse netlink ext attribute to get the error message returned by
the card. Code is partially take from libnl.
Signed-off-by: Eric Leblond
Acked-by: Alexei Starovoitov
---
samples/bpf/Makefile | 2 +-
tools/lib/bpf/Build| 2 +-
tools/lib/bpf/bpf.c| 10 ++-
tools/lib/bpf/nlattr.c | 187 +
tools/lib/bpf/nlattr.h | 70 ++
5 files changed, 268 insertions(+), 3 deletions(-)
create mode 100644 tools/lib/bpf/nlattr.c
create mode 100644 tools/lib/bpf/nlattr.h
diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
index 4fb944a7ecf8..c889ebcba9b3 100644
--- a/samples/bpf/Makefile
+++ b/samples/bpf/Makefile
@@ -44,7 +44,7 @@ hostprogs-y += xdp_monitor
hostprogs-y += syscall_tp
# Libbpf dependencies
-LIBBPF := ../../tools/lib/bpf/bpf.o
+LIBBPF := ../../tools/lib/bpf/bpf.o ../../tools/lib/bpf/nlattr.o
CGROUP_HELPERS := ../../tools/testing/selftests/bpf/cgroup_helpers.o
test_lru_dist-objs := test_lru_dist.o $(LIBBPF)
diff --git a/tools/lib/bpf/Build b/tools/lib/bpf/Build
index d8749756352d..64c679d67109 100644
--- a/tools/lib/bpf/Build
+++ b/tools/lib/bpf/Build
@@ -1 +1 @@
-libbpf-y := libbpf.o bpf.o
+libbpf-y := libbpf.o bpf.o nlattr.o
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index e6c61035b64c..10d71b9fdbd0 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -26,6 +26,7 @@
#include
#include "bpf.h"
#include "libbpf.h"
+#include "nlattr.h"
#include
#include
#include
@@ -440,6 +441,7 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
struct nlmsghdr *nh;
struct nlmsgerr *err;
socklen_t addrlen;
+ int one;
memset(, 0, sizeof(sa));
sa.nl_family = AF_NETLINK;
@@ -449,6 +451,11 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
return -errno;
}
+ if (setsockopt(sock, SOL_NETLINK, NETLINK_EXT_ACK,
+ , sizeof(one)) < 0) {
+ fprintf(stderr, "Netlink error reporting not supported\n");
+ }
+
if (bind(sock, (struct sockaddr *), sizeof(sa)) < 0) {
ret = -errno;
goto cleanup;
@@ -524,7 +531,8 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
err = (struct nlmsgerr *)NLMSG_DATA(nh);
if (!err->error)
continue;
- ret = err->error;
+ ret = -err->error;
+ nla_dump_errormsg(nh);
goto cleanup;
case NLMSG_DONE:
break;
diff --git a/tools/lib/bpf/nlattr.c b/tools/lib/bpf/nlattr.c
new file mode 100644
index ..4719434278b2
--- /dev/null
+++ b/tools/lib/bpf/nlattr.c
@@ -0,0 +1,187 @@
+// SPDX-License-Identifier: LGPL-2.1
+
+/*
+ * NETLINK Netlink attributes
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation version 2.1
+ * of the License.
+ *
+ * Copyright (c) 2003-2013 Thomas Graf
+ */
+
+#include
+#include "nlattr.h"
+#include
+#include
+#include
+
+static uint16_t nla_attr_minlen[NLA_TYPE_MAX+1] = {
+ [NLA_U8]= sizeof(uint8_t),
+ [NLA_U16] = sizeof(uint16_t),
+ [NLA_U32] = sizeof(uint32_t),
+ [NLA_U64] = sizeof(uint64_t),
+ [NLA_STRING]= 1,
+ [NLA_FLAG] = 0,
+};
+
+static int nla_len(const struct nlattr *nla)
+{
+ return nla->nla_len - NLA_HDRLEN;
+}
+
+static struct nlattr *nla_next(const struct nlattr *nla, int *remaining)
+{
+ int totlen = NLA_ALIGN(nla->nla_len);
+
+ *remaining -= totlen;
+ return (struct nlattr *) ((char *) nla + totlen);
+}
+
+static int nla_ok(const struct nlattr *nla, int remaining)
+{
+ return remaining >= sizeof(*nla) &&
+ nla->nla_len >= sizeof(*nla) &&
+ nla->nla_len <= remaining;
+}
+
+static void *nla_data(const struct nlattr *nla)
+{
+ return (char *) nla + NLA_HDRLEN;
+}
+
+static int nla_type(const struct nlattr *nla)
+{
+ return nla->nla_type & NLA_TYPE_MASK;
+}
+
+static int validate_nla(struct nlattr *nla, int maxtype,
+ struct nla_policy *policy)
+{
+ struct nla_policy *pt;
+ unsigned int minlen = 0;
+ int type = nla_type(nla);
+
+ if (type < 0 || type > maxtype)
+ return 0;
+
+ pt = [type];
+
+ if (pt->type > NLA_TYPE_MAX)
+ return 0;
+
+ if (pt->minlen)
+ minlen = pt->minlen;
+ else if (pt->type != NLA_UNSPEC)
+ minlen = nla_attr_minlen[pt->type];
+
+ if (nla_len(nla) < minlen)
+
[PATCH bpf-next v5 1/4] libbpf: add function to setup XDP
Most of the code is taken from set_link_xdp_fd() in bpf_load.c and
slightly modified to be library compliant.
Signed-off-by: Eric Leblond <e...@regit.org>
Acked-by: Alexei Starovoitov <a...@kernel.org>
---
tools/lib/bpf/bpf.c| 126 +
tools/lib/bpf/libbpf.c | 2 +
tools/lib/bpf/libbpf.h | 4 ++
3 files changed, 132 insertions(+)
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index 5128677e4117..e6c61035b64c 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -25,6 +25,16 @@
#include
#include
#include "bpf.h"
+#include "libbpf.h"
+#include
+#include
+#include
+
+#ifndef IFLA_XDP_MAX
+#define IFLA_XDP 43
+#define IFLA_XDP_FD1
+#define IFLA_XDP_FLAGS 3
+#endif
/*
* When building perf, unistd.h is overridden. __NR_bpf is
@@ -46,7 +56,9 @@
# endif
#endif
+#ifndef min
#define min(x, y) ((x) < (y) ? (x) : (y))
+#endif
static inline __u64 ptr_to_u64(const void *ptr)
{
@@ -413,3 +425,117 @@ int bpf_obj_get_info_by_fd(int prog_fd, void *info, __u32
*info_len)
return err;
}
+
+int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
+{
+ struct sockaddr_nl sa;
+ int sock, seq = 0, len, ret = -1;
+ char buf[4096];
+ struct nlattr *nla, *nla_xdp;
+ struct {
+ struct nlmsghdr nh;
+ struct ifinfomsg ifinfo;
+ char attrbuf[64];
+ } req;
+ struct nlmsghdr *nh;
+ struct nlmsgerr *err;
+ socklen_t addrlen;
+
+ memset(, 0, sizeof(sa));
+ sa.nl_family = AF_NETLINK;
+
+ sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
+ if (sock < 0) {
+ return -errno;
+ }
+
+ if (bind(sock, (struct sockaddr *), sizeof(sa)) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ addrlen = sizeof(sa);
+ if (getsockname(sock, (struct sockaddr *), ) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ if (addrlen != sizeof(sa)) {
+ ret = -LIBBPF_ERRNO__INTERNAL;
+ goto cleanup;
+ }
+
+ memset(, 0, sizeof(req));
+ req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
+ req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
+ req.nh.nlmsg_type = RTM_SETLINK;
+ req.nh.nlmsg_pid = 0;
+ req.nh.nlmsg_seq = ++seq;
+ req.ifinfo.ifi_family = AF_UNSPEC;
+ req.ifinfo.ifi_index = ifindex;
+
+ /* started nested attribute for XDP */
+ nla = (struct nlattr *)(((char *))
+ + NLMSG_ALIGN(req.nh.nlmsg_len));
+ nla->nla_type = NLA_F_NESTED | IFLA_XDP;
+ nla->nla_len = NLA_HDRLEN;
+
+ /* add XDP fd */
+ nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
+ nla_xdp->nla_type = IFLA_XDP_FD;
+ nla_xdp->nla_len = NLA_HDRLEN + sizeof(int);
+ memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(fd));
+ nla->nla_len += nla_xdp->nla_len;
+
+ /* if user passed in any flags, add those too */
+ if (flags) {
+ nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
+ nla_xdp->nla_type = IFLA_XDP_FLAGS;
+ nla_xdp->nla_len = NLA_HDRLEN + sizeof(flags);
+ memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(flags));
+ nla->nla_len += nla_xdp->nla_len;
+ }
+
+ req.nh.nlmsg_len += NLA_ALIGN(nla->nla_len);
+
+ if (send(sock, , req.nh.nlmsg_len, 0) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ len = recv(sock, buf, sizeof(buf), 0);
+ if (len < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ for (nh = (struct nlmsghdr *)buf; NLMSG_OK(nh, len);
+nh = NLMSG_NEXT(nh, len)) {
+ if (nh->nlmsg_pid != sa.nl_pid) {
+ ret = -LIBBPF_ERRNO__WRNGPID;
+ goto cleanup;
+ }
+ if (nh->nlmsg_seq != seq) {
+ ret = -LIBBPF_ERRNO__INVSEQ;
+ goto cleanup;
+ }
+ switch (nh->nlmsg_type) {
+ case NLMSG_ERROR:
+ err = (struct nlmsgerr *)NLMSG_DATA(nh);
+ if (!err->error)
+ continue;
+ ret = err->error;
+ goto cleanup;
+ case NLMSG_DONE:
+ break;
+ default:
+ break;
+ }
+ }
+
+ ret = 0;
+
+cleanup:
+ close(sock);
+ return ret;
+}
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index e9c4b7cabcf2..5fe8aaa2123e 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -106,6 +106,8 @@ static co
[PATCH bpf-next v5 1/4] libbpf: add function to setup XDP
Most of the code is taken from set_link_xdp_fd() in bpf_load.c and
slightly modified to be library compliant.
Signed-off-by: Eric Leblond
Acked-by: Alexei Starovoitov
---
tools/lib/bpf/bpf.c| 126 +
tools/lib/bpf/libbpf.c | 2 +
tools/lib/bpf/libbpf.h | 4 ++
3 files changed, 132 insertions(+)
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index 5128677e4117..e6c61035b64c 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -25,6 +25,16 @@
#include
#include
#include "bpf.h"
+#include "libbpf.h"
+#include
+#include
+#include
+
+#ifndef IFLA_XDP_MAX
+#define IFLA_XDP 43
+#define IFLA_XDP_FD1
+#define IFLA_XDP_FLAGS 3
+#endif
/*
* When building perf, unistd.h is overridden. __NR_bpf is
@@ -46,7 +56,9 @@
# endif
#endif
+#ifndef min
#define min(x, y) ((x) < (y) ? (x) : (y))
+#endif
static inline __u64 ptr_to_u64(const void *ptr)
{
@@ -413,3 +425,117 @@ int bpf_obj_get_info_by_fd(int prog_fd, void *info, __u32
*info_len)
return err;
}
+
+int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
+{
+ struct sockaddr_nl sa;
+ int sock, seq = 0, len, ret = -1;
+ char buf[4096];
+ struct nlattr *nla, *nla_xdp;
+ struct {
+ struct nlmsghdr nh;
+ struct ifinfomsg ifinfo;
+ char attrbuf[64];
+ } req;
+ struct nlmsghdr *nh;
+ struct nlmsgerr *err;
+ socklen_t addrlen;
+
+ memset(, 0, sizeof(sa));
+ sa.nl_family = AF_NETLINK;
+
+ sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
+ if (sock < 0) {
+ return -errno;
+ }
+
+ if (bind(sock, (struct sockaddr *), sizeof(sa)) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ addrlen = sizeof(sa);
+ if (getsockname(sock, (struct sockaddr *), ) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ if (addrlen != sizeof(sa)) {
+ ret = -LIBBPF_ERRNO__INTERNAL;
+ goto cleanup;
+ }
+
+ memset(, 0, sizeof(req));
+ req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
+ req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
+ req.nh.nlmsg_type = RTM_SETLINK;
+ req.nh.nlmsg_pid = 0;
+ req.nh.nlmsg_seq = ++seq;
+ req.ifinfo.ifi_family = AF_UNSPEC;
+ req.ifinfo.ifi_index = ifindex;
+
+ /* started nested attribute for XDP */
+ nla = (struct nlattr *)(((char *))
+ + NLMSG_ALIGN(req.nh.nlmsg_len));
+ nla->nla_type = NLA_F_NESTED | IFLA_XDP;
+ nla->nla_len = NLA_HDRLEN;
+
+ /* add XDP fd */
+ nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
+ nla_xdp->nla_type = IFLA_XDP_FD;
+ nla_xdp->nla_len = NLA_HDRLEN + sizeof(int);
+ memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(fd));
+ nla->nla_len += nla_xdp->nla_len;
+
+ /* if user passed in any flags, add those too */
+ if (flags) {
+ nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
+ nla_xdp->nla_type = IFLA_XDP_FLAGS;
+ nla_xdp->nla_len = NLA_HDRLEN + sizeof(flags);
+ memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(flags));
+ nla->nla_len += nla_xdp->nla_len;
+ }
+
+ req.nh.nlmsg_len += NLA_ALIGN(nla->nla_len);
+
+ if (send(sock, , req.nh.nlmsg_len, 0) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ len = recv(sock, buf, sizeof(buf), 0);
+ if (len < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ for (nh = (struct nlmsghdr *)buf; NLMSG_OK(nh, len);
+nh = NLMSG_NEXT(nh, len)) {
+ if (nh->nlmsg_pid != sa.nl_pid) {
+ ret = -LIBBPF_ERRNO__WRNGPID;
+ goto cleanup;
+ }
+ if (nh->nlmsg_seq != seq) {
+ ret = -LIBBPF_ERRNO__INVSEQ;
+ goto cleanup;
+ }
+ switch (nh->nlmsg_type) {
+ case NLMSG_ERROR:
+ err = (struct nlmsgerr *)NLMSG_DATA(nh);
+ if (!err->error)
+ continue;
+ ret = err->error;
+ goto cleanup;
+ case NLMSG_DONE:
+ break;
+ default:
+ break;
+ }
+ }
+
+ ret = 0;
+
+cleanup:
+ close(sock);
+ return ret;
+}
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index e9c4b7cabcf2..5fe8aaa2123e 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -106,6 +106,8 @@ static const char *libbpf_strerror_table[NR_ERRNO] =
Re: [PATCH bpf-next v4 1/3] libbpf: add function to setup XDP
Hello, On Sat, 2017-12-30 at 21:41 +0100, Eric Leblond wrote: > Most of the code is taken from set_link_xdp_fd() in bpf_load.c and > slightly modified to be library compliant. I've just discovered this patch is breaking the build of samples/bpf/ (nlattr not included at least and some int type problem). I'm going to resubmit a patchset fixing this. Sorry for the noise. Best regards, -- Eric Leblond <e...@regit.org> Blog: https://home.regit.org/
Re: [PATCH bpf-next v4 1/3] libbpf: add function to setup XDP
Hello, On Sat, 2017-12-30 at 21:41 +0100, Eric Leblond wrote: > Most of the code is taken from set_link_xdp_fd() in bpf_load.c and > slightly modified to be library compliant. I've just discovered this patch is breaking the build of samples/bpf/ (nlattr not included at least and some int type problem). I'm going to resubmit a patchset fixing this. Sorry for the noise. Best regards, -- Eric Leblond Blog: https://home.regit.org/
[PATCH bpf-next v4 3/3] libbpf: add missing SPDX-License-Identifier
Signed-off-by: Eric Leblond <e...@regit.org> Acked-by: Alexei Starovoitov <a...@kernel.org> --- tools/lib/bpf/bpf.c| 2 ++ tools/lib/bpf/bpf.h| 2 ++ tools/lib/bpf/libbpf.c | 2 ++ tools/lib/bpf/libbpf.h | 2 ++ 4 files changed, 8 insertions(+) diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c index ceb20c5cae3b..ab8b2eb31273 100644 --- a/tools/lib/bpf/bpf.c +++ b/tools/lib/bpf/bpf.c @@ -1,3 +1,5 @@ +// SPDX-License-Identifier: LGPL-2.1 + /* * common eBPF ELF operations. * diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h index 9f44c196931e..8d18fb73d7fb 100644 --- a/tools/lib/bpf/bpf.h +++ b/tools/lib/bpf/bpf.h @@ -1,3 +1,5 @@ +/* SPDX-License-Identifier: LGPL-2.1 */ + /* * common eBPF ELF operations. * diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index 5fe8aaa2123e..924a8b8431ab 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -1,3 +1,5 @@ +// SPDX-License-Identifier: LGPL-2.1 + /* * Common eBPF ELF object loading operations. * diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h index e42f96900318..f85906533cdd 100644 --- a/tools/lib/bpf/libbpf.h +++ b/tools/lib/bpf/libbpf.h @@ -1,3 +1,5 @@ +/* SPDX-License-Identifier: LGPL-2.1 */ + /* * Common eBPF ELF object loading operations. * -- 2.15.1
[PATCH bpf-next v4 3/3] libbpf: add missing SPDX-License-Identifier
Signed-off-by: Eric Leblond Acked-by: Alexei Starovoitov --- tools/lib/bpf/bpf.c| 2 ++ tools/lib/bpf/bpf.h| 2 ++ tools/lib/bpf/libbpf.c | 2 ++ tools/lib/bpf/libbpf.h | 2 ++ 4 files changed, 8 insertions(+) diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c index ceb20c5cae3b..ab8b2eb31273 100644 --- a/tools/lib/bpf/bpf.c +++ b/tools/lib/bpf/bpf.c @@ -1,3 +1,5 @@ +// SPDX-License-Identifier: LGPL-2.1 + /* * common eBPF ELF operations. * diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h index 9f44c196931e..8d18fb73d7fb 100644 --- a/tools/lib/bpf/bpf.h +++ b/tools/lib/bpf/bpf.h @@ -1,3 +1,5 @@ +/* SPDX-License-Identifier: LGPL-2.1 */ + /* * common eBPF ELF operations. * diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index 5fe8aaa2123e..924a8b8431ab 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -1,3 +1,5 @@ +// SPDX-License-Identifier: LGPL-2.1 + /* * Common eBPF ELF object loading operations. * diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h index e42f96900318..f85906533cdd 100644 --- a/tools/lib/bpf/libbpf.h +++ b/tools/lib/bpf/libbpf.h @@ -1,3 +1,5 @@ +/* SPDX-License-Identifier: LGPL-2.1 */ + /* * Common eBPF ELF object loading operations. * -- 2.15.1
[PATCH bpf-next v4 2/3] libbpf: add error reporting in XDP
Parse netlink ext attribute to get the error message returned by
the card. Code is partially take from libnl.
Signed-off-by: Eric Leblond <e...@regit.org>
Acked-by: Alexei Starovoitov <a...@kernel.org>
---
tools/lib/bpf/Build| 2 +-
tools/lib/bpf/bpf.c| 10 ++-
tools/lib/bpf/nlattr.c | 187 +
tools/lib/bpf/nlattr.h | 69 ++
4 files changed, 266 insertions(+), 2 deletions(-)
create mode 100644 tools/lib/bpf/nlattr.c
create mode 100644 tools/lib/bpf/nlattr.h
diff --git a/tools/lib/bpf/Build b/tools/lib/bpf/Build
index d8749756352d..64c679d67109 100644
--- a/tools/lib/bpf/Build
+++ b/tools/lib/bpf/Build
@@ -1 +1 @@
-libbpf-y := libbpf.o bpf.o
+libbpf-y := libbpf.o bpf.o nlattr.o
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index f00fba2edeae..ceb20c5cae3b 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -26,6 +26,7 @@
#include
#include "bpf.h"
#include "libbpf.h"
+#include "nlattr.h"
#include
#include
#include
@@ -436,6 +437,7 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
struct nlmsghdr *nh;
struct nlmsgerr *err;
socklen_t addrlen;
+ int one;
memset(, 0, sizeof(sa));
sa.nl_family = AF_NETLINK;
@@ -445,6 +447,11 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
return -errno;
}
+ if (setsockopt(sock, SOL_NETLINK, NETLINK_EXT_ACK,
+ , sizeof(one)) < 0) {
+ fprintf(stderr, "Netlink error reporting not supported\n");
+ }
+
if (bind(sock, (struct sockaddr *), sizeof(sa)) < 0) {
ret = -errno;
goto cleanup;
@@ -520,7 +527,8 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
err = (struct nlmsgerr *)NLMSG_DATA(nh);
if (!err->error)
continue;
- ret = err->error;
+ ret = -err->error;
+ nla_dump_errormsg(nh);
goto cleanup;
case NLMSG_DONE:
break;
diff --git a/tools/lib/bpf/nlattr.c b/tools/lib/bpf/nlattr.c
new file mode 100644
index ..4719434278b2
--- /dev/null
+++ b/tools/lib/bpf/nlattr.c
@@ -0,0 +1,187 @@
+// SPDX-License-Identifier: LGPL-2.1
+
+/*
+ * NETLINK Netlink attributes
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation version 2.1
+ * of the License.
+ *
+ * Copyright (c) 2003-2013 Thomas Graf <tg...@suug.ch>
+ */
+
+#include
+#include "nlattr.h"
+#include
+#include
+#include
+
+static uint16_t nla_attr_minlen[NLA_TYPE_MAX+1] = {
+ [NLA_U8]= sizeof(uint8_t),
+ [NLA_U16] = sizeof(uint16_t),
+ [NLA_U32] = sizeof(uint32_t),
+ [NLA_U64] = sizeof(uint64_t),
+ [NLA_STRING]= 1,
+ [NLA_FLAG] = 0,
+};
+
+static int nla_len(const struct nlattr *nla)
+{
+ return nla->nla_len - NLA_HDRLEN;
+}
+
+static struct nlattr *nla_next(const struct nlattr *nla, int *remaining)
+{
+ int totlen = NLA_ALIGN(nla->nla_len);
+
+ *remaining -= totlen;
+ return (struct nlattr *) ((char *) nla + totlen);
+}
+
+static int nla_ok(const struct nlattr *nla, int remaining)
+{
+ return remaining >= sizeof(*nla) &&
+ nla->nla_len >= sizeof(*nla) &&
+ nla->nla_len <= remaining;
+}
+
+static void *nla_data(const struct nlattr *nla)
+{
+ return (char *) nla + NLA_HDRLEN;
+}
+
+static int nla_type(const struct nlattr *nla)
+{
+ return nla->nla_type & NLA_TYPE_MASK;
+}
+
+static int validate_nla(struct nlattr *nla, int maxtype,
+ struct nla_policy *policy)
+{
+ struct nla_policy *pt;
+ unsigned int minlen = 0;
+ int type = nla_type(nla);
+
+ if (type < 0 || type > maxtype)
+ return 0;
+
+ pt = [type];
+
+ if (pt->type > NLA_TYPE_MAX)
+ return 0;
+
+ if (pt->minlen)
+ minlen = pt->minlen;
+ else if (pt->type != NLA_UNSPEC)
+ minlen = nla_attr_minlen[pt->type];
+
+ if (nla_len(nla) < minlen)
+ return -1;
+
+ if (pt->maxlen && nla_len(nla) > pt->maxlen)
+ return -1;
+
+ if (pt->type == NLA_STRING) {
+ char *data = nla_data(nla);
+ if (data[nla_len(nla) - 1] != '\0')
+ return -1;
+ }
+
+ return 0;
+}
+
+static inline int nlmsg_len(const struct nlmsghdr *nlh)
+{
+ return nlh->nlmsg_len - NLMSG_HDRLEN;
+}
+
+/**
+ * Crea
[PATCH bpf-next v4 2/3] libbpf: add error reporting in XDP
Parse netlink ext attribute to get the error message returned by
the card. Code is partially take from libnl.
Signed-off-by: Eric Leblond
Acked-by: Alexei Starovoitov
---
tools/lib/bpf/Build| 2 +-
tools/lib/bpf/bpf.c| 10 ++-
tools/lib/bpf/nlattr.c | 187 +
tools/lib/bpf/nlattr.h | 69 ++
4 files changed, 266 insertions(+), 2 deletions(-)
create mode 100644 tools/lib/bpf/nlattr.c
create mode 100644 tools/lib/bpf/nlattr.h
diff --git a/tools/lib/bpf/Build b/tools/lib/bpf/Build
index d8749756352d..64c679d67109 100644
--- a/tools/lib/bpf/Build
+++ b/tools/lib/bpf/Build
@@ -1 +1 @@
-libbpf-y := libbpf.o bpf.o
+libbpf-y := libbpf.o bpf.o nlattr.o
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index f00fba2edeae..ceb20c5cae3b 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -26,6 +26,7 @@
#include
#include "bpf.h"
#include "libbpf.h"
+#include "nlattr.h"
#include
#include
#include
@@ -436,6 +437,7 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
struct nlmsghdr *nh;
struct nlmsgerr *err;
socklen_t addrlen;
+ int one;
memset(, 0, sizeof(sa));
sa.nl_family = AF_NETLINK;
@@ -445,6 +447,11 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
return -errno;
}
+ if (setsockopt(sock, SOL_NETLINK, NETLINK_EXT_ACK,
+ , sizeof(one)) < 0) {
+ fprintf(stderr, "Netlink error reporting not supported\n");
+ }
+
if (bind(sock, (struct sockaddr *), sizeof(sa)) < 0) {
ret = -errno;
goto cleanup;
@@ -520,7 +527,8 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
err = (struct nlmsgerr *)NLMSG_DATA(nh);
if (!err->error)
continue;
- ret = err->error;
+ ret = -err->error;
+ nla_dump_errormsg(nh);
goto cleanup;
case NLMSG_DONE:
break;
diff --git a/tools/lib/bpf/nlattr.c b/tools/lib/bpf/nlattr.c
new file mode 100644
index ..4719434278b2
--- /dev/null
+++ b/tools/lib/bpf/nlattr.c
@@ -0,0 +1,187 @@
+// SPDX-License-Identifier: LGPL-2.1
+
+/*
+ * NETLINK Netlink attributes
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation version 2.1
+ * of the License.
+ *
+ * Copyright (c) 2003-2013 Thomas Graf
+ */
+
+#include
+#include "nlattr.h"
+#include
+#include
+#include
+
+static uint16_t nla_attr_minlen[NLA_TYPE_MAX+1] = {
+ [NLA_U8]= sizeof(uint8_t),
+ [NLA_U16] = sizeof(uint16_t),
+ [NLA_U32] = sizeof(uint32_t),
+ [NLA_U64] = sizeof(uint64_t),
+ [NLA_STRING]= 1,
+ [NLA_FLAG] = 0,
+};
+
+static int nla_len(const struct nlattr *nla)
+{
+ return nla->nla_len - NLA_HDRLEN;
+}
+
+static struct nlattr *nla_next(const struct nlattr *nla, int *remaining)
+{
+ int totlen = NLA_ALIGN(nla->nla_len);
+
+ *remaining -= totlen;
+ return (struct nlattr *) ((char *) nla + totlen);
+}
+
+static int nla_ok(const struct nlattr *nla, int remaining)
+{
+ return remaining >= sizeof(*nla) &&
+ nla->nla_len >= sizeof(*nla) &&
+ nla->nla_len <= remaining;
+}
+
+static void *nla_data(const struct nlattr *nla)
+{
+ return (char *) nla + NLA_HDRLEN;
+}
+
+static int nla_type(const struct nlattr *nla)
+{
+ return nla->nla_type & NLA_TYPE_MASK;
+}
+
+static int validate_nla(struct nlattr *nla, int maxtype,
+ struct nla_policy *policy)
+{
+ struct nla_policy *pt;
+ unsigned int minlen = 0;
+ int type = nla_type(nla);
+
+ if (type < 0 || type > maxtype)
+ return 0;
+
+ pt = [type];
+
+ if (pt->type > NLA_TYPE_MAX)
+ return 0;
+
+ if (pt->minlen)
+ minlen = pt->minlen;
+ else if (pt->type != NLA_UNSPEC)
+ minlen = nla_attr_minlen[pt->type];
+
+ if (nla_len(nla) < minlen)
+ return -1;
+
+ if (pt->maxlen && nla_len(nla) > pt->maxlen)
+ return -1;
+
+ if (pt->type == NLA_STRING) {
+ char *data = nla_data(nla);
+ if (data[nla_len(nla) - 1] != '\0')
+ return -1;
+ }
+
+ return 0;
+}
+
+static inline int nlmsg_len(const struct nlmsghdr *nlh)
+{
+ return nlh->nlmsg_len - NLMSG_HDRLEN;
+}
+
+/**
+ * Create attribute index based on a stream of attributes.
+ * @arg tb
[PATCH bpf-next v4 1/3] libbpf: add function to setup XDP
Most of the code is taken from set_link_xdp_fd() in bpf_load.c and
slightly modified to be library compliant.
Signed-off-by: Eric Leblond <e...@regit.org>
Acked-by: Alexei Starovoitov <a...@kernel.org>
---
tools/lib/bpf/bpf.c| 126 -
tools/lib/bpf/libbpf.c | 2 +
tools/lib/bpf/libbpf.h | 4 ++
3 files changed, 130 insertions(+), 2 deletions(-)
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index 5128677e4117..f00fba2edeae 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -25,6 +25,16 @@
#include
#include
#include "bpf.h"
+#include "libbpf.h"
+#include
+#include
+#include
+
+#ifndef IFLA_XDP_MAX
+#define IFLA_XDP 43
+#define IFLA_XDP_FD1
+#define IFLA_XDP_FLAGS 3
+#endif
/*
* When building perf, unistd.h is overridden. __NR_bpf is
@@ -46,8 +56,6 @@
# endif
#endif
-#define min(x, y) ((x) < (y) ? (x) : (y))
-
static inline __u64 ptr_to_u64(const void *ptr)
{
return (__u64) (unsigned long) ptr;
@@ -413,3 +421,117 @@ int bpf_obj_get_info_by_fd(int prog_fd, void *info, __u32
*info_len)
return err;
}
+
+int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
+{
+ struct sockaddr_nl sa;
+ int sock, seq = 0, len, ret = -1;
+ char buf[4096];
+ struct nlattr *nla, *nla_xdp;
+ struct {
+ struct nlmsghdr nh;
+ struct ifinfomsg ifinfo;
+ char attrbuf[64];
+ } req;
+ struct nlmsghdr *nh;
+ struct nlmsgerr *err;
+ socklen_t addrlen;
+
+ memset(, 0, sizeof(sa));
+ sa.nl_family = AF_NETLINK;
+
+ sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
+ if (sock < 0) {
+ return -errno;
+ }
+
+ if (bind(sock, (struct sockaddr *), sizeof(sa)) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ addrlen = sizeof(sa);
+ if (getsockname(sock, (struct sockaddr *), ) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ if (addrlen != sizeof(sa)) {
+ ret = -LIBBPF_ERRNO__INTERNAL;
+ goto cleanup;
+ }
+
+ memset(, 0, sizeof(req));
+ req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
+ req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
+ req.nh.nlmsg_type = RTM_SETLINK;
+ req.nh.nlmsg_pid = 0;
+ req.nh.nlmsg_seq = ++seq;
+ req.ifinfo.ifi_family = AF_UNSPEC;
+ req.ifinfo.ifi_index = ifindex;
+
+ /* started nested attribute for XDP */
+ nla = (struct nlattr *)(((char *))
+ + NLMSG_ALIGN(req.nh.nlmsg_len));
+ nla->nla_type = NLA_F_NESTED | IFLA_XDP;
+ nla->nla_len = NLA_HDRLEN;
+
+ /* add XDP fd */
+ nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
+ nla_xdp->nla_type = IFLA_XDP_FD;
+ nla_xdp->nla_len = NLA_HDRLEN + sizeof(int);
+ memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(fd));
+ nla->nla_len += nla_xdp->nla_len;
+
+ /* if user passed in any flags, add those too */
+ if (flags) {
+ nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
+ nla_xdp->nla_type = IFLA_XDP_FLAGS;
+ nla_xdp->nla_len = NLA_HDRLEN + sizeof(flags);
+ memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(flags));
+ nla->nla_len += nla_xdp->nla_len;
+ }
+
+ req.nh.nlmsg_len += NLA_ALIGN(nla->nla_len);
+
+ if (send(sock, , req.nh.nlmsg_len, 0) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ len = recv(sock, buf, sizeof(buf), 0);
+ if (len < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ for (nh = (struct nlmsghdr *)buf; NLMSG_OK(nh, len);
+nh = NLMSG_NEXT(nh, len)) {
+ if (nh->nlmsg_pid != sa.nl_pid) {
+ ret = -LIBBPF_ERRNO__WRNGPID;
+ goto cleanup;
+ }
+ if (nh->nlmsg_seq != seq) {
+ ret = -LIBBPF_ERRNO__INVSEQ;
+ goto cleanup;
+ }
+ switch (nh->nlmsg_type) {
+ case NLMSG_ERROR:
+ err = (struct nlmsgerr *)NLMSG_DATA(nh);
+ if (!err->error)
+ continue;
+ ret = err->error;
+ goto cleanup;
+ case NLMSG_DONE:
+ break;
+ default:
+ break;
+ }
+ }
+
+ ret = 0;
+
+cleanup:
+ close(sock);
+ return ret;
+}
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index e9c4b7cabcf2..5fe8aaa2123e 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/lib
[PATCH bpf-next v4 1/3] libbpf: add function to setup XDP
Most of the code is taken from set_link_xdp_fd() in bpf_load.c and
slightly modified to be library compliant.
Signed-off-by: Eric Leblond
Acked-by: Alexei Starovoitov
---
tools/lib/bpf/bpf.c| 126 -
tools/lib/bpf/libbpf.c | 2 +
tools/lib/bpf/libbpf.h | 4 ++
3 files changed, 130 insertions(+), 2 deletions(-)
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index 5128677e4117..f00fba2edeae 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -25,6 +25,16 @@
#include
#include
#include "bpf.h"
+#include "libbpf.h"
+#include
+#include
+#include
+
+#ifndef IFLA_XDP_MAX
+#define IFLA_XDP 43
+#define IFLA_XDP_FD1
+#define IFLA_XDP_FLAGS 3
+#endif
/*
* When building perf, unistd.h is overridden. __NR_bpf is
@@ -46,8 +56,6 @@
# endif
#endif
-#define min(x, y) ((x) < (y) ? (x) : (y))
-
static inline __u64 ptr_to_u64(const void *ptr)
{
return (__u64) (unsigned long) ptr;
@@ -413,3 +421,117 @@ int bpf_obj_get_info_by_fd(int prog_fd, void *info, __u32
*info_len)
return err;
}
+
+int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
+{
+ struct sockaddr_nl sa;
+ int sock, seq = 0, len, ret = -1;
+ char buf[4096];
+ struct nlattr *nla, *nla_xdp;
+ struct {
+ struct nlmsghdr nh;
+ struct ifinfomsg ifinfo;
+ char attrbuf[64];
+ } req;
+ struct nlmsghdr *nh;
+ struct nlmsgerr *err;
+ socklen_t addrlen;
+
+ memset(, 0, sizeof(sa));
+ sa.nl_family = AF_NETLINK;
+
+ sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
+ if (sock < 0) {
+ return -errno;
+ }
+
+ if (bind(sock, (struct sockaddr *), sizeof(sa)) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ addrlen = sizeof(sa);
+ if (getsockname(sock, (struct sockaddr *), ) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ if (addrlen != sizeof(sa)) {
+ ret = -LIBBPF_ERRNO__INTERNAL;
+ goto cleanup;
+ }
+
+ memset(, 0, sizeof(req));
+ req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
+ req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
+ req.nh.nlmsg_type = RTM_SETLINK;
+ req.nh.nlmsg_pid = 0;
+ req.nh.nlmsg_seq = ++seq;
+ req.ifinfo.ifi_family = AF_UNSPEC;
+ req.ifinfo.ifi_index = ifindex;
+
+ /* started nested attribute for XDP */
+ nla = (struct nlattr *)(((char *))
+ + NLMSG_ALIGN(req.nh.nlmsg_len));
+ nla->nla_type = NLA_F_NESTED | IFLA_XDP;
+ nla->nla_len = NLA_HDRLEN;
+
+ /* add XDP fd */
+ nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
+ nla_xdp->nla_type = IFLA_XDP_FD;
+ nla_xdp->nla_len = NLA_HDRLEN + sizeof(int);
+ memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(fd));
+ nla->nla_len += nla_xdp->nla_len;
+
+ /* if user passed in any flags, add those too */
+ if (flags) {
+ nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
+ nla_xdp->nla_type = IFLA_XDP_FLAGS;
+ nla_xdp->nla_len = NLA_HDRLEN + sizeof(flags);
+ memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(flags));
+ nla->nla_len += nla_xdp->nla_len;
+ }
+
+ req.nh.nlmsg_len += NLA_ALIGN(nla->nla_len);
+
+ if (send(sock, , req.nh.nlmsg_len, 0) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ len = recv(sock, buf, sizeof(buf), 0);
+ if (len < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ for (nh = (struct nlmsghdr *)buf; NLMSG_OK(nh, len);
+nh = NLMSG_NEXT(nh, len)) {
+ if (nh->nlmsg_pid != sa.nl_pid) {
+ ret = -LIBBPF_ERRNO__WRNGPID;
+ goto cleanup;
+ }
+ if (nh->nlmsg_seq != seq) {
+ ret = -LIBBPF_ERRNO__INVSEQ;
+ goto cleanup;
+ }
+ switch (nh->nlmsg_type) {
+ case NLMSG_ERROR:
+ err = (struct nlmsgerr *)NLMSG_DATA(nh);
+ if (!err->error)
+ continue;
+ ret = err->error;
+ goto cleanup;
+ case NLMSG_DONE:
+ break;
+ default:
+ break;
+ }
+ }
+
+ ret = 0;
+
+cleanup:
+ close(sock);
+ return ret;
+}
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index e9c4b7cabcf2..5fe8aaa2123e 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -106,6 +106,8 @@ static const char
[PATCH bpf-next v4 0/3] libbpf: add function to setup XDP
Hello, This updated patchset address the remarks by Toshiaki Makita and Philippe Ombredanne: - fixes on errno handling - correct usage of SPDX header Best regards, -- Eric Leblond
[PATCH bpf-next v4 0/3] libbpf: add function to setup XDP
Hello, This updated patchset address the remarks by Toshiaki Makita and Philippe Ombredanne: - fixes on errno handling - correct usage of SPDX header Best regards, -- Eric Leblond
[PATCH bpf-next v3 3/3] libbpf: add missing SPDX-License-Identifier
Signed-off-by: Eric Leblond <e...@regit.org> Acked-by: Alexei Starovoitov <a...@kernel.org> --- tools/lib/bpf/bpf.c| 2 ++ tools/lib/bpf/bpf.h| 2 ++ tools/lib/bpf/libbpf.c | 2 ++ tools/lib/bpf/libbpf.h | 2 ++ 4 files changed, 8 insertions(+) diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c index cdfabbe118cc..9e53dbbca2bd 100644 --- a/tools/lib/bpf/bpf.c +++ b/tools/lib/bpf/bpf.c @@ -1,3 +1,5 @@ +/* SPDX-License-Identifier: LGPL-2.1 */ + /* * common eBPF ELF operations. * diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h index 9f44c196931e..8d18fb73d7fb 100644 --- a/tools/lib/bpf/bpf.h +++ b/tools/lib/bpf/bpf.h @@ -1,3 +1,5 @@ +/* SPDX-License-Identifier: LGPL-2.1 */ + /* * common eBPF ELF operations. * diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index 5fe8aaa2123e..878e240a681b 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -1,3 +1,5 @@ +/* SPDX-License-Identifier: LGPL-2.1 */ + /* * Common eBPF ELF object loading operations. * diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h index e42f96900318..f85906533cdd 100644 --- a/tools/lib/bpf/libbpf.h +++ b/tools/lib/bpf/libbpf.h @@ -1,3 +1,5 @@ +/* SPDX-License-Identifier: LGPL-2.1 */ + /* * Common eBPF ELF object loading operations. * -- 2.15.1
[PATCH bpf-next v3 3/3] libbpf: add missing SPDX-License-Identifier
Signed-off-by: Eric Leblond Acked-by: Alexei Starovoitov --- tools/lib/bpf/bpf.c| 2 ++ tools/lib/bpf/bpf.h| 2 ++ tools/lib/bpf/libbpf.c | 2 ++ tools/lib/bpf/libbpf.h | 2 ++ 4 files changed, 8 insertions(+) diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c index cdfabbe118cc..9e53dbbca2bd 100644 --- a/tools/lib/bpf/bpf.c +++ b/tools/lib/bpf/bpf.c @@ -1,3 +1,5 @@ +/* SPDX-License-Identifier: LGPL-2.1 */ + /* * common eBPF ELF operations. * diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h index 9f44c196931e..8d18fb73d7fb 100644 --- a/tools/lib/bpf/bpf.h +++ b/tools/lib/bpf/bpf.h @@ -1,3 +1,5 @@ +/* SPDX-License-Identifier: LGPL-2.1 */ + /* * common eBPF ELF operations. * diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index 5fe8aaa2123e..878e240a681b 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -1,3 +1,5 @@ +/* SPDX-License-Identifier: LGPL-2.1 */ + /* * Common eBPF ELF object loading operations. * diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h index e42f96900318..f85906533cdd 100644 --- a/tools/lib/bpf/libbpf.h +++ b/tools/lib/bpf/libbpf.h @@ -1,3 +1,5 @@ +/* SPDX-License-Identifier: LGPL-2.1 */ + /* * Common eBPF ELF object loading operations. * -- 2.15.1
[PATCH bpf-next v3 1/3] libbpf: add function to setup XDP
Most of the code is taken from set_link_xdp_fd() in bpf_load.c and
slightly modified to be library compliant.
Signed-off-by: Eric Leblond <e...@regit.org>
Acked-by: Alexei Starovoitov <a...@kernel.org>
---
tools/lib/bpf/bpf.c| 126 -
tools/lib/bpf/libbpf.c | 2 +
tools/lib/bpf/libbpf.h | 4 ++
3 files changed, 130 insertions(+), 2 deletions(-)
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index 5128677e4117..1e3cfe6b9fce 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -25,6 +25,16 @@
#include
#include
#include "bpf.h"
+#include "libbpf.h"
+#include
+#include
+#include
+
+#ifndef IFLA_XDP_MAX
+#define IFLA_XDP 43
+#define IFLA_XDP_FD1
+#define IFLA_XDP_FLAGS 3
+#endif
/*
* When building perf, unistd.h is overridden. __NR_bpf is
@@ -46,8 +56,6 @@
# endif
#endif
-#define min(x, y) ((x) < (y) ? (x) : (y))
-
static inline __u64 ptr_to_u64(const void *ptr)
{
return (__u64) (unsigned long) ptr;
@@ -413,3 +421,117 @@ int bpf_obj_get_info_by_fd(int prog_fd, void *info, __u32
*info_len)
return err;
}
+
+int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
+{
+ struct sockaddr_nl sa;
+ int sock, seq = 0, len, ret = -1;
+ char buf[4096];
+ struct nlattr *nla, *nla_xdp;
+ struct {
+ struct nlmsghdr nh;
+ struct ifinfomsg ifinfo;
+ char attrbuf[64];
+ } req;
+ struct nlmsghdr *nh;
+ struct nlmsgerr *err;
+ socklen_t addrlen;
+
+ memset(, 0, sizeof(sa));
+ sa.nl_family = AF_NETLINK;
+
+ sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
+ if (sock < 0) {
+ return -errno;
+ }
+
+ if (bind(sock, (struct sockaddr *), sizeof(sa)) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ addrlen = sizeof(sa);
+ if (getsockname(sock, (struct sockaddr *), ) < 0) {
+ ret = errno;
+ goto cleanup;
+ }
+
+ if (addrlen != sizeof(sa)) {
+ ret = errno;
+ goto cleanup;
+ }
+
+ memset(, 0, sizeof(req));
+ req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
+ req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
+ req.nh.nlmsg_type = RTM_SETLINK;
+ req.nh.nlmsg_pid = 0;
+ req.nh.nlmsg_seq = ++seq;
+ req.ifinfo.ifi_family = AF_UNSPEC;
+ req.ifinfo.ifi_index = ifindex;
+
+ /* started nested attribute for XDP */
+ nla = (struct nlattr *)(((char *))
+ + NLMSG_ALIGN(req.nh.nlmsg_len));
+ nla->nla_type = NLA_F_NESTED | IFLA_XDP;
+ nla->nla_len = NLA_HDRLEN;
+
+ /* add XDP fd */
+ nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
+ nla_xdp->nla_type = IFLA_XDP_FD;
+ nla_xdp->nla_len = NLA_HDRLEN + sizeof(int);
+ memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(fd));
+ nla->nla_len += nla_xdp->nla_len;
+
+ /* if user passed in any flags, add those too */
+ if (flags) {
+ nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
+ nla_xdp->nla_type = IFLA_XDP_FLAGS;
+ nla_xdp->nla_len = NLA_HDRLEN + sizeof(flags);
+ memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(flags));
+ nla->nla_len += nla_xdp->nla_len;
+ }
+
+ req.nh.nlmsg_len += NLA_ALIGN(nla->nla_len);
+
+ if (send(sock, , req.nh.nlmsg_len, 0) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ len = recv(sock, buf, sizeof(buf), 0);
+ if (len < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ for (nh = (struct nlmsghdr *)buf; NLMSG_OK(nh, len);
+nh = NLMSG_NEXT(nh, len)) {
+ if (nh->nlmsg_pid != sa.nl_pid) {
+ ret = -LIBBPF_ERRNO__WRNGPID;
+ goto cleanup;
+ }
+ if (nh->nlmsg_seq != seq) {
+ ret = -LIBBPF_ERRNO__INVSEQ;
+ goto cleanup;
+ }
+ switch (nh->nlmsg_type) {
+ case NLMSG_ERROR:
+ err = (struct nlmsgerr *)NLMSG_DATA(nh);
+ if (!err->error)
+ continue;
+ ret = err->error;
+ goto cleanup;
+ case NLMSG_DONE:
+ break;
+ default:
+ break;
+ }
+ }
+
+ ret = 0;
+
+cleanup:
+ close(sock);
+ return ret;
+}
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index e9c4b7cabcf2..5fe8aaa2123e 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@
[PATCH bpf-next v3 0/3] libbpf: add XDP setup support
Hello, This patchset adds support for loading eBPF code as XDP filter. Best regards, -- Eric Leblond
[PATCH bpf-next v3 0/3] libbpf: add XDP setup support
Hello, This patchset adds support for loading eBPF code as XDP filter. Best regards, -- Eric Leblond
[PATCH bpf-next v3 1/3] libbpf: add function to setup XDP
Most of the code is taken from set_link_xdp_fd() in bpf_load.c and
slightly modified to be library compliant.
Signed-off-by: Eric Leblond
Acked-by: Alexei Starovoitov
---
tools/lib/bpf/bpf.c| 126 -
tools/lib/bpf/libbpf.c | 2 +
tools/lib/bpf/libbpf.h | 4 ++
3 files changed, 130 insertions(+), 2 deletions(-)
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index 5128677e4117..1e3cfe6b9fce 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -25,6 +25,16 @@
#include
#include
#include "bpf.h"
+#include "libbpf.h"
+#include
+#include
+#include
+
+#ifndef IFLA_XDP_MAX
+#define IFLA_XDP 43
+#define IFLA_XDP_FD1
+#define IFLA_XDP_FLAGS 3
+#endif
/*
* When building perf, unistd.h is overridden. __NR_bpf is
@@ -46,8 +56,6 @@
# endif
#endif
-#define min(x, y) ((x) < (y) ? (x) : (y))
-
static inline __u64 ptr_to_u64(const void *ptr)
{
return (__u64) (unsigned long) ptr;
@@ -413,3 +421,117 @@ int bpf_obj_get_info_by_fd(int prog_fd, void *info, __u32
*info_len)
return err;
}
+
+int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
+{
+ struct sockaddr_nl sa;
+ int sock, seq = 0, len, ret = -1;
+ char buf[4096];
+ struct nlattr *nla, *nla_xdp;
+ struct {
+ struct nlmsghdr nh;
+ struct ifinfomsg ifinfo;
+ char attrbuf[64];
+ } req;
+ struct nlmsghdr *nh;
+ struct nlmsgerr *err;
+ socklen_t addrlen;
+
+ memset(, 0, sizeof(sa));
+ sa.nl_family = AF_NETLINK;
+
+ sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
+ if (sock < 0) {
+ return -errno;
+ }
+
+ if (bind(sock, (struct sockaddr *), sizeof(sa)) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ addrlen = sizeof(sa);
+ if (getsockname(sock, (struct sockaddr *), ) < 0) {
+ ret = errno;
+ goto cleanup;
+ }
+
+ if (addrlen != sizeof(sa)) {
+ ret = errno;
+ goto cleanup;
+ }
+
+ memset(, 0, sizeof(req));
+ req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
+ req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
+ req.nh.nlmsg_type = RTM_SETLINK;
+ req.nh.nlmsg_pid = 0;
+ req.nh.nlmsg_seq = ++seq;
+ req.ifinfo.ifi_family = AF_UNSPEC;
+ req.ifinfo.ifi_index = ifindex;
+
+ /* started nested attribute for XDP */
+ nla = (struct nlattr *)(((char *))
+ + NLMSG_ALIGN(req.nh.nlmsg_len));
+ nla->nla_type = NLA_F_NESTED | IFLA_XDP;
+ nla->nla_len = NLA_HDRLEN;
+
+ /* add XDP fd */
+ nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
+ nla_xdp->nla_type = IFLA_XDP_FD;
+ nla_xdp->nla_len = NLA_HDRLEN + sizeof(int);
+ memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(fd));
+ nla->nla_len += nla_xdp->nla_len;
+
+ /* if user passed in any flags, add those too */
+ if (flags) {
+ nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
+ nla_xdp->nla_type = IFLA_XDP_FLAGS;
+ nla_xdp->nla_len = NLA_HDRLEN + sizeof(flags);
+ memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(flags));
+ nla->nla_len += nla_xdp->nla_len;
+ }
+
+ req.nh.nlmsg_len += NLA_ALIGN(nla->nla_len);
+
+ if (send(sock, , req.nh.nlmsg_len, 0) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ len = recv(sock, buf, sizeof(buf), 0);
+ if (len < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ for (nh = (struct nlmsghdr *)buf; NLMSG_OK(nh, len);
+nh = NLMSG_NEXT(nh, len)) {
+ if (nh->nlmsg_pid != sa.nl_pid) {
+ ret = -LIBBPF_ERRNO__WRNGPID;
+ goto cleanup;
+ }
+ if (nh->nlmsg_seq != seq) {
+ ret = -LIBBPF_ERRNO__INVSEQ;
+ goto cleanup;
+ }
+ switch (nh->nlmsg_type) {
+ case NLMSG_ERROR:
+ err = (struct nlmsgerr *)NLMSG_DATA(nh);
+ if (!err->error)
+ continue;
+ ret = err->error;
+ goto cleanup;
+ case NLMSG_DONE:
+ break;
+ default:
+ break;
+ }
+ }
+
+ ret = 0;
+
+cleanup:
+ close(sock);
+ return ret;
+}
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index e9c4b7cabcf2..5fe8aaa2123e 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -106,6 +106,8 @@ static const char *li
[PATCH bpf-next v3 2/3] libbpf: add error reporting in XDP
Parse netlink ext attribute to get the error message returned by
the card. Code is partially take from libnl.
Signed-off-by: Eric Leblond <e...@regit.org>
Acked-by: Alexei Starovoitov <a...@kernel.org>
---
tools/lib/bpf/Build| 2 +-
tools/lib/bpf/bpf.c| 9 +++
tools/lib/bpf/nlattr.c | 187 +
tools/lib/bpf/nlattr.h | 69 ++
4 files changed, 266 insertions(+), 1 deletion(-)
create mode 100644 tools/lib/bpf/nlattr.c
create mode 100644 tools/lib/bpf/nlattr.h
diff --git a/tools/lib/bpf/Build b/tools/lib/bpf/Build
index d8749756352d..64c679d67109 100644
--- a/tools/lib/bpf/Build
+++ b/tools/lib/bpf/Build
@@ -1 +1 @@
-libbpf-y := libbpf.o bpf.o
+libbpf-y := libbpf.o bpf.o nlattr.o
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index 1e3cfe6b9fce..cdfabbe118cc 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -26,6 +26,7 @@
#include
#include "bpf.h"
#include "libbpf.h"
+#include "nlattr.h"
#include
#include
#include
@@ -436,6 +437,7 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
struct nlmsghdr *nh;
struct nlmsgerr *err;
socklen_t addrlen;
+ int one;
memset(, 0, sizeof(sa));
sa.nl_family = AF_NETLINK;
@@ -445,6 +447,12 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
return -errno;
}
+ if (setsockopt(sock, SOL_NETLINK, NETLINK_EXT_ACK,
+ , sizeof(one)) < 0) {
+ /* debug/verbose message that it is not supported */
+ fprintf(stderr, "Netlink error reporting not supported\n");
+ }
+
if (bind(sock, (struct sockaddr *), sizeof(sa)) < 0) {
ret = -errno;
goto cleanup;
@@ -521,6 +529,7 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
if (!err->error)
continue;
ret = err->error;
+ nla_dump_errormsg(nh);
goto cleanup;
case NLMSG_DONE:
break;
diff --git a/tools/lib/bpf/nlattr.c b/tools/lib/bpf/nlattr.c
new file mode 100644
index ..5cc74fa98049
--- /dev/null
+++ b/tools/lib/bpf/nlattr.c
@@ -0,0 +1,187 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
+
+/*
+ * NETLINK Netlink attributes
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation version 2.1
+ * of the License.
+ *
+ * Copyright (c) 2003-2013 Thomas Graf <tg...@suug.ch>
+ */
+
+#include
+#include "nlattr.h"
+#include
+#include
+#include
+
+static uint16_t nla_attr_minlen[NLA_TYPE_MAX+1] = {
+ [NLA_U8]= sizeof(uint8_t),
+ [NLA_U16] = sizeof(uint16_t),
+ [NLA_U32] = sizeof(uint32_t),
+ [NLA_U64] = sizeof(uint64_t),
+ [NLA_STRING]= 1,
+ [NLA_FLAG] = 0,
+};
+
+static int nla_len(const struct nlattr *nla)
+{
+ return nla->nla_len - NLA_HDRLEN;
+}
+
+static struct nlattr *nla_next(const struct nlattr *nla, int *remaining)
+{
+ int totlen = NLA_ALIGN(nla->nla_len);
+
+ *remaining -= totlen;
+ return (struct nlattr *) ((char *) nla + totlen);
+}
+
+static int nla_ok(const struct nlattr *nla, int remaining)
+{
+ return remaining >= sizeof(*nla) &&
+ nla->nla_len >= sizeof(*nla) &&
+ nla->nla_len <= remaining;
+}
+
+static void *nla_data(const struct nlattr *nla)
+{
+ return (char *) nla + NLA_HDRLEN;
+}
+
+static int nla_type(const struct nlattr *nla)
+{
+ return nla->nla_type & NLA_TYPE_MASK;
+}
+
+static int validate_nla(struct nlattr *nla, int maxtype,
+ struct nla_policy *policy)
+{
+ struct nla_policy *pt;
+ unsigned int minlen = 0;
+ int type = nla_type(nla);
+
+ if (type < 0 || type > maxtype)
+ return 0;
+
+ pt = [type];
+
+ if (pt->type > NLA_TYPE_MAX)
+ return 0;
+
+ if (pt->minlen)
+ minlen = pt->minlen;
+ else if (pt->type != NLA_UNSPEC)
+ minlen = nla_attr_minlen[pt->type];
+
+ if (nla_len(nla) < minlen)
+ return -1;
+
+ if (pt->maxlen && nla_len(nla) > pt->maxlen)
+ return -1;
+
+ if (pt->type == NLA_STRING) {
+ char *data = nla_data(nla);
+ if (data[nla_len(nla) - 1] != '\0')
+ return -1;
+ }
+
+ return 0;
+}
+
+static inline int nlmsg_len(const struct nlmsghdr *nlh)
+{
+ return nlh->nlmsg_len - NLMSG_HDRLEN;
+}
+
+/**
+ * Create attribute index based on a stream of
[PATCH bpf-next v3 2/3] libbpf: add error reporting in XDP
Parse netlink ext attribute to get the error message returned by
the card. Code is partially take from libnl.
Signed-off-by: Eric Leblond
Acked-by: Alexei Starovoitov
---
tools/lib/bpf/Build| 2 +-
tools/lib/bpf/bpf.c| 9 +++
tools/lib/bpf/nlattr.c | 187 +
tools/lib/bpf/nlattr.h | 69 ++
4 files changed, 266 insertions(+), 1 deletion(-)
create mode 100644 tools/lib/bpf/nlattr.c
create mode 100644 tools/lib/bpf/nlattr.h
diff --git a/tools/lib/bpf/Build b/tools/lib/bpf/Build
index d8749756352d..64c679d67109 100644
--- a/tools/lib/bpf/Build
+++ b/tools/lib/bpf/Build
@@ -1 +1 @@
-libbpf-y := libbpf.o bpf.o
+libbpf-y := libbpf.o bpf.o nlattr.o
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index 1e3cfe6b9fce..cdfabbe118cc 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -26,6 +26,7 @@
#include
#include "bpf.h"
#include "libbpf.h"
+#include "nlattr.h"
#include
#include
#include
@@ -436,6 +437,7 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
struct nlmsghdr *nh;
struct nlmsgerr *err;
socklen_t addrlen;
+ int one;
memset(, 0, sizeof(sa));
sa.nl_family = AF_NETLINK;
@@ -445,6 +447,12 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
return -errno;
}
+ if (setsockopt(sock, SOL_NETLINK, NETLINK_EXT_ACK,
+ , sizeof(one)) < 0) {
+ /* debug/verbose message that it is not supported */
+ fprintf(stderr, "Netlink error reporting not supported\n");
+ }
+
if (bind(sock, (struct sockaddr *), sizeof(sa)) < 0) {
ret = -errno;
goto cleanup;
@@ -521,6 +529,7 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
if (!err->error)
continue;
ret = err->error;
+ nla_dump_errormsg(nh);
goto cleanup;
case NLMSG_DONE:
break;
diff --git a/tools/lib/bpf/nlattr.c b/tools/lib/bpf/nlattr.c
new file mode 100644
index ..5cc74fa98049
--- /dev/null
+++ b/tools/lib/bpf/nlattr.c
@@ -0,0 +1,187 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
+
+/*
+ * NETLINK Netlink attributes
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation version 2.1
+ * of the License.
+ *
+ * Copyright (c) 2003-2013 Thomas Graf
+ */
+
+#include
+#include "nlattr.h"
+#include
+#include
+#include
+
+static uint16_t nla_attr_minlen[NLA_TYPE_MAX+1] = {
+ [NLA_U8]= sizeof(uint8_t),
+ [NLA_U16] = sizeof(uint16_t),
+ [NLA_U32] = sizeof(uint32_t),
+ [NLA_U64] = sizeof(uint64_t),
+ [NLA_STRING]= 1,
+ [NLA_FLAG] = 0,
+};
+
+static int nla_len(const struct nlattr *nla)
+{
+ return nla->nla_len - NLA_HDRLEN;
+}
+
+static struct nlattr *nla_next(const struct nlattr *nla, int *remaining)
+{
+ int totlen = NLA_ALIGN(nla->nla_len);
+
+ *remaining -= totlen;
+ return (struct nlattr *) ((char *) nla + totlen);
+}
+
+static int nla_ok(const struct nlattr *nla, int remaining)
+{
+ return remaining >= sizeof(*nla) &&
+ nla->nla_len >= sizeof(*nla) &&
+ nla->nla_len <= remaining;
+}
+
+static void *nla_data(const struct nlattr *nla)
+{
+ return (char *) nla + NLA_HDRLEN;
+}
+
+static int nla_type(const struct nlattr *nla)
+{
+ return nla->nla_type & NLA_TYPE_MASK;
+}
+
+static int validate_nla(struct nlattr *nla, int maxtype,
+ struct nla_policy *policy)
+{
+ struct nla_policy *pt;
+ unsigned int minlen = 0;
+ int type = nla_type(nla);
+
+ if (type < 0 || type > maxtype)
+ return 0;
+
+ pt = [type];
+
+ if (pt->type > NLA_TYPE_MAX)
+ return 0;
+
+ if (pt->minlen)
+ minlen = pt->minlen;
+ else if (pt->type != NLA_UNSPEC)
+ minlen = nla_attr_minlen[pt->type];
+
+ if (nla_len(nla) < minlen)
+ return -1;
+
+ if (pt->maxlen && nla_len(nla) > pt->maxlen)
+ return -1;
+
+ if (pt->type == NLA_STRING) {
+ char *data = nla_data(nla);
+ if (data[nla_len(nla) - 1] != '\0')
+ return -1;
+ }
+
+ return 0;
+}
+
+static inline int nlmsg_len(const struct nlmsghdr *nlh)
+{
+ return nlh->nlmsg_len - NLMSG_HDRLEN;
+}
+
+/**
+ * Create attribute index based on a stream of attributes.
+ * @arg tb Index array to be filled (maxty
Re: [PATCH 3/4] libbpf: break loop earlier
Hello, On Wed, 2017-12-27 at 11:00 -0800, Alexei Starovoitov wrote: > On Wed, Dec 27, 2017 at 07:02:28PM +0100, Eric Leblond wrote: > > Get out of the loop when we have a match. > > > > Signed-off-by: Eric Leblond <e...@regit.org> > > --- > > tools/lib/bpf/libbpf.c | 1 + > > 1 file changed, 1 insertion(+) > > > > diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c > > index 5fe8aaa2123e..d263748aa341 100644 > > --- a/tools/lib/bpf/libbpf.c > > +++ b/tools/lib/bpf/libbpf.c > > @@ -412,6 +412,7 @@ bpf_object__init_prog_names(struct bpf_object > > *obj) > >prog->section_name); > > return -LIBBPF_ERRNO__LIBELF; > > } > > + break; > > why this is needed? It was just cosmetic, no related bug. > The top of the loop is: > for (si = 0; si < symbols->d_size / sizeof(GElf_Sym) && !name; > > so as soon as name is found the loop will exit. OK, I've missed that. Please disregard this patch. BR, -- Eric Leblond <e...@regit.org>
Re: [PATCH 3/4] libbpf: break loop earlier
Hello, On Wed, 2017-12-27 at 11:00 -0800, Alexei Starovoitov wrote: > On Wed, Dec 27, 2017 at 07:02:28PM +0100, Eric Leblond wrote: > > Get out of the loop when we have a match. > > > > Signed-off-by: Eric Leblond > > --- > > tools/lib/bpf/libbpf.c | 1 + > > 1 file changed, 1 insertion(+) > > > > diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c > > index 5fe8aaa2123e..d263748aa341 100644 > > --- a/tools/lib/bpf/libbpf.c > > +++ b/tools/lib/bpf/libbpf.c > > @@ -412,6 +412,7 @@ bpf_object__init_prog_names(struct bpf_object > > *obj) > >prog->section_name); > > return -LIBBPF_ERRNO__LIBELF; > > } > > + break; > > why this is needed? It was just cosmetic, no related bug. > The top of the loop is: > for (si = 0; si < symbols->d_size / sizeof(GElf_Sym) && !name; > > so as soon as name is found the loop will exit. OK, I've missed that. Please disregard this patch. BR, -- Eric Leblond
[PATCH 3/4] libbpf: break loop earlier
Get out of the loop when we have a match.
Signed-off-by: Eric Leblond <e...@regit.org>
---
tools/lib/bpf/libbpf.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 5fe8aaa2123e..d263748aa341 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -412,6 +412,7 @@ bpf_object__init_prog_names(struct bpf_object *obj)
prog->section_name);
return -LIBBPF_ERRNO__LIBELF;
}
+ break;
}
if (!name) {
--
2.15.1
[PATCH 3/4] libbpf: break loop earlier
Get out of the loop when we have a match.
Signed-off-by: Eric Leblond
---
tools/lib/bpf/libbpf.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 5fe8aaa2123e..d263748aa341 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -412,6 +412,7 @@ bpf_object__init_prog_names(struct bpf_object *obj)
prog->section_name);
return -LIBBPF_ERRNO__LIBELF;
}
+ break;
}
if (!name) {
--
2.15.1
[PATCH 4/4] libbpf: add missing SPDX-License-Identifier
Signed-off-by: Eric Leblond <e...@regit.org> --- tools/lib/bpf/bpf.c| 2 ++ tools/lib/bpf/bpf.h| 2 ++ tools/lib/bpf/libbpf.c | 2 ++ tools/lib/bpf/libbpf.h | 2 ++ 4 files changed, 8 insertions(+) diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c index cdfabbe118cc..9e53dbbca2bd 100644 --- a/tools/lib/bpf/bpf.c +++ b/tools/lib/bpf/bpf.c @@ -1,3 +1,5 @@ +/* SPDX-License-Identifier: LGPL-2.1 */ + /* * common eBPF ELF operations. * diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h index 9f44c196931e..8d18fb73d7fb 100644 --- a/tools/lib/bpf/bpf.h +++ b/tools/lib/bpf/bpf.h @@ -1,3 +1,5 @@ +/* SPDX-License-Identifier: LGPL-2.1 */ + /* * common eBPF ELF operations. * diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index d263748aa341..50d4b5e73d0e 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -1,3 +1,5 @@ +/* SPDX-License-Identifier: LGPL-2.1 */ + /* * Common eBPF ELF object loading operations. * diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h index e42f96900318..f85906533cdd 100644 --- a/tools/lib/bpf/libbpf.h +++ b/tools/lib/bpf/libbpf.h @@ -1,3 +1,5 @@ +/* SPDX-License-Identifier: LGPL-2.1 */ + /* * Common eBPF ELF object loading operations. * -- 2.15.1
[PATCH 2/4] libbpf: add error reporting in XDP
Parse netlink ext attribute to get the error message returned by
the card. Code is partially take from libnl.
Signed-off-by: Eric Leblond <e...@regit.org>
---
tools/lib/bpf/Build| 2 +-
tools/lib/bpf/bpf.c| 9 +++
tools/lib/bpf/nlattr.c | 187 +
tools/lib/bpf/nlattr.h | 69 ++
4 files changed, 266 insertions(+), 1 deletion(-)
create mode 100644 tools/lib/bpf/nlattr.c
create mode 100644 tools/lib/bpf/nlattr.h
diff --git a/tools/lib/bpf/Build b/tools/lib/bpf/Build
index d8749756352d..64c679d67109 100644
--- a/tools/lib/bpf/Build
+++ b/tools/lib/bpf/Build
@@ -1 +1 @@
-libbpf-y := libbpf.o bpf.o
+libbpf-y := libbpf.o bpf.o nlattr.o
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index 1e3cfe6b9fce..cdfabbe118cc 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -26,6 +26,7 @@
#include
#include "bpf.h"
#include "libbpf.h"
+#include "nlattr.h"
#include
#include
#include
@@ -436,6 +437,7 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
struct nlmsghdr *nh;
struct nlmsgerr *err;
socklen_t addrlen;
+ int one;
memset(, 0, sizeof(sa));
sa.nl_family = AF_NETLINK;
@@ -445,6 +447,12 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
return -errno;
}
+ if (setsockopt(sock, SOL_NETLINK, NETLINK_EXT_ACK,
+ , sizeof(one)) < 0) {
+ /* debug/verbose message that it is not supported */
+ fprintf(stderr, "Netlink error reporting not supported\n");
+ }
+
if (bind(sock, (struct sockaddr *), sizeof(sa)) < 0) {
ret = -errno;
goto cleanup;
@@ -521,6 +529,7 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
if (!err->error)
continue;
ret = err->error;
+ nla_dump_errormsg(nh);
goto cleanup;
case NLMSG_DONE:
break;
diff --git a/tools/lib/bpf/nlattr.c b/tools/lib/bpf/nlattr.c
new file mode 100644
index ..5cc74fa98049
--- /dev/null
+++ b/tools/lib/bpf/nlattr.c
@@ -0,0 +1,187 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
+
+/*
+ * NETLINK Netlink attributes
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation version 2.1
+ * of the License.
+ *
+ * Copyright (c) 2003-2013 Thomas Graf <tg...@suug.ch>
+ */
+
+#include
+#include "nlattr.h"
+#include
+#include
+#include
+
+static uint16_t nla_attr_minlen[NLA_TYPE_MAX+1] = {
+ [NLA_U8]= sizeof(uint8_t),
+ [NLA_U16] = sizeof(uint16_t),
+ [NLA_U32] = sizeof(uint32_t),
+ [NLA_U64] = sizeof(uint64_t),
+ [NLA_STRING]= 1,
+ [NLA_FLAG] = 0,
+};
+
+static int nla_len(const struct nlattr *nla)
+{
+ return nla->nla_len - NLA_HDRLEN;
+}
+
+static struct nlattr *nla_next(const struct nlattr *nla, int *remaining)
+{
+ int totlen = NLA_ALIGN(nla->nla_len);
+
+ *remaining -= totlen;
+ return (struct nlattr *) ((char *) nla + totlen);
+}
+
+static int nla_ok(const struct nlattr *nla, int remaining)
+{
+ return remaining >= sizeof(*nla) &&
+ nla->nla_len >= sizeof(*nla) &&
+ nla->nla_len <= remaining;
+}
+
+static void *nla_data(const struct nlattr *nla)
+{
+ return (char *) nla + NLA_HDRLEN;
+}
+
+static int nla_type(const struct nlattr *nla)
+{
+ return nla->nla_type & NLA_TYPE_MASK;
+}
+
+static int validate_nla(struct nlattr *nla, int maxtype,
+ struct nla_policy *policy)
+{
+ struct nla_policy *pt;
+ unsigned int minlen = 0;
+ int type = nla_type(nla);
+
+ if (type < 0 || type > maxtype)
+ return 0;
+
+ pt = [type];
+
+ if (pt->type > NLA_TYPE_MAX)
+ return 0;
+
+ if (pt->minlen)
+ minlen = pt->minlen;
+ else if (pt->type != NLA_UNSPEC)
+ minlen = nla_attr_minlen[pt->type];
+
+ if (nla_len(nla) < minlen)
+ return -1;
+
+ if (pt->maxlen && nla_len(nla) > pt->maxlen)
+ return -1;
+
+ if (pt->type == NLA_STRING) {
+ char *data = nla_data(nla);
+ if (data[nla_len(nla) - 1] != '\0')
+ return -1;
+ }
+
+ return 0;
+}
+
+static inline int nlmsg_len(const struct nlmsghdr *nlh)
+{
+ return nlh->nlmsg_len - NLMSG_HDRLEN;
+}
+
+/**
+ * Create attribute index based on a stream of attributes.
+ * @arg tb Index array to be f
[PATCH 4/4] libbpf: add missing SPDX-License-Identifier
Signed-off-by: Eric Leblond --- tools/lib/bpf/bpf.c| 2 ++ tools/lib/bpf/bpf.h| 2 ++ tools/lib/bpf/libbpf.c | 2 ++ tools/lib/bpf/libbpf.h | 2 ++ 4 files changed, 8 insertions(+) diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c index cdfabbe118cc..9e53dbbca2bd 100644 --- a/tools/lib/bpf/bpf.c +++ b/tools/lib/bpf/bpf.c @@ -1,3 +1,5 @@ +/* SPDX-License-Identifier: LGPL-2.1 */ + /* * common eBPF ELF operations. * diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h index 9f44c196931e..8d18fb73d7fb 100644 --- a/tools/lib/bpf/bpf.h +++ b/tools/lib/bpf/bpf.h @@ -1,3 +1,5 @@ +/* SPDX-License-Identifier: LGPL-2.1 */ + /* * common eBPF ELF operations. * diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index d263748aa341..50d4b5e73d0e 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -1,3 +1,5 @@ +/* SPDX-License-Identifier: LGPL-2.1 */ + /* * Common eBPF ELF object loading operations. * diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h index e42f96900318..f85906533cdd 100644 --- a/tools/lib/bpf/libbpf.h +++ b/tools/lib/bpf/libbpf.h @@ -1,3 +1,5 @@ +/* SPDX-License-Identifier: LGPL-2.1 */ + /* * Common eBPF ELF object loading operations. * -- 2.15.1
[PATCH 2/4] libbpf: add error reporting in XDP
Parse netlink ext attribute to get the error message returned by
the card. Code is partially take from libnl.
Signed-off-by: Eric Leblond
---
tools/lib/bpf/Build| 2 +-
tools/lib/bpf/bpf.c| 9 +++
tools/lib/bpf/nlattr.c | 187 +
tools/lib/bpf/nlattr.h | 69 ++
4 files changed, 266 insertions(+), 1 deletion(-)
create mode 100644 tools/lib/bpf/nlattr.c
create mode 100644 tools/lib/bpf/nlattr.h
diff --git a/tools/lib/bpf/Build b/tools/lib/bpf/Build
index d8749756352d..64c679d67109 100644
--- a/tools/lib/bpf/Build
+++ b/tools/lib/bpf/Build
@@ -1 +1 @@
-libbpf-y := libbpf.o bpf.o
+libbpf-y := libbpf.o bpf.o nlattr.o
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index 1e3cfe6b9fce..cdfabbe118cc 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -26,6 +26,7 @@
#include
#include "bpf.h"
#include "libbpf.h"
+#include "nlattr.h"
#include
#include
#include
@@ -436,6 +437,7 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
struct nlmsghdr *nh;
struct nlmsgerr *err;
socklen_t addrlen;
+ int one;
memset(, 0, sizeof(sa));
sa.nl_family = AF_NETLINK;
@@ -445,6 +447,12 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
return -errno;
}
+ if (setsockopt(sock, SOL_NETLINK, NETLINK_EXT_ACK,
+ , sizeof(one)) < 0) {
+ /* debug/verbose message that it is not supported */
+ fprintf(stderr, "Netlink error reporting not supported\n");
+ }
+
if (bind(sock, (struct sockaddr *), sizeof(sa)) < 0) {
ret = -errno;
goto cleanup;
@@ -521,6 +529,7 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
if (!err->error)
continue;
ret = err->error;
+ nla_dump_errormsg(nh);
goto cleanup;
case NLMSG_DONE:
break;
diff --git a/tools/lib/bpf/nlattr.c b/tools/lib/bpf/nlattr.c
new file mode 100644
index ..5cc74fa98049
--- /dev/null
+++ b/tools/lib/bpf/nlattr.c
@@ -0,0 +1,187 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
+
+/*
+ * NETLINK Netlink attributes
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation version 2.1
+ * of the License.
+ *
+ * Copyright (c) 2003-2013 Thomas Graf
+ */
+
+#include
+#include "nlattr.h"
+#include
+#include
+#include
+
+static uint16_t nla_attr_minlen[NLA_TYPE_MAX+1] = {
+ [NLA_U8]= sizeof(uint8_t),
+ [NLA_U16] = sizeof(uint16_t),
+ [NLA_U32] = sizeof(uint32_t),
+ [NLA_U64] = sizeof(uint64_t),
+ [NLA_STRING]= 1,
+ [NLA_FLAG] = 0,
+};
+
+static int nla_len(const struct nlattr *nla)
+{
+ return nla->nla_len - NLA_HDRLEN;
+}
+
+static struct nlattr *nla_next(const struct nlattr *nla, int *remaining)
+{
+ int totlen = NLA_ALIGN(nla->nla_len);
+
+ *remaining -= totlen;
+ return (struct nlattr *) ((char *) nla + totlen);
+}
+
+static int nla_ok(const struct nlattr *nla, int remaining)
+{
+ return remaining >= sizeof(*nla) &&
+ nla->nla_len >= sizeof(*nla) &&
+ nla->nla_len <= remaining;
+}
+
+static void *nla_data(const struct nlattr *nla)
+{
+ return (char *) nla + NLA_HDRLEN;
+}
+
+static int nla_type(const struct nlattr *nla)
+{
+ return nla->nla_type & NLA_TYPE_MASK;
+}
+
+static int validate_nla(struct nlattr *nla, int maxtype,
+ struct nla_policy *policy)
+{
+ struct nla_policy *pt;
+ unsigned int minlen = 0;
+ int type = nla_type(nla);
+
+ if (type < 0 || type > maxtype)
+ return 0;
+
+ pt = [type];
+
+ if (pt->type > NLA_TYPE_MAX)
+ return 0;
+
+ if (pt->minlen)
+ minlen = pt->minlen;
+ else if (pt->type != NLA_UNSPEC)
+ minlen = nla_attr_minlen[pt->type];
+
+ if (nla_len(nla) < minlen)
+ return -1;
+
+ if (pt->maxlen && nla_len(nla) > pt->maxlen)
+ return -1;
+
+ if (pt->type == NLA_STRING) {
+ char *data = nla_data(nla);
+ if (data[nla_len(nla) - 1] != '\0')
+ return -1;
+ }
+
+ return 0;
+}
+
+static inline int nlmsg_len(const struct nlmsghdr *nlh)
+{
+ return nlh->nlmsg_len - NLMSG_HDRLEN;
+}
+
+/**
+ * Create attribute index based on a stream of attributes.
+ * @arg tb Index array to be filled (maxtype+1 elements).
+ * @arg maxtyp
[PATCH 1/4] libbpf: add function to setup XDP
Most of the code is taken from set_link_xdp_fd() in bpf_load.c and
slightly modified to be library compliant.
Signed-off-by: Eric Leblond <e...@regit.org>
---
tools/lib/bpf/bpf.c| 126 -
tools/lib/bpf/libbpf.c | 2 +
tools/lib/bpf/libbpf.h | 4 ++
3 files changed, 130 insertions(+), 2 deletions(-)
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index 5128677e4117..1e3cfe6b9fce 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -25,6 +25,16 @@
#include
#include
#include "bpf.h"
+#include "libbpf.h"
+#include
+#include
+#include
+
+#ifndef IFLA_XDP_MAX
+#define IFLA_XDP 43
+#define IFLA_XDP_FD1
+#define IFLA_XDP_FLAGS 3
+#endif
/*
* When building perf, unistd.h is overridden. __NR_bpf is
@@ -46,8 +56,6 @@
# endif
#endif
-#define min(x, y) ((x) < (y) ? (x) : (y))
-
static inline __u64 ptr_to_u64(const void *ptr)
{
return (__u64) (unsigned long) ptr;
@@ -413,3 +421,117 @@ int bpf_obj_get_info_by_fd(int prog_fd, void *info, __u32
*info_len)
return err;
}
+
+int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
+{
+ struct sockaddr_nl sa;
+ int sock, seq = 0, len, ret = -1;
+ char buf[4096];
+ struct nlattr *nla, *nla_xdp;
+ struct {
+ struct nlmsghdr nh;
+ struct ifinfomsg ifinfo;
+ char attrbuf[64];
+ } req;
+ struct nlmsghdr *nh;
+ struct nlmsgerr *err;
+ socklen_t addrlen;
+
+ memset(, 0, sizeof(sa));
+ sa.nl_family = AF_NETLINK;
+
+ sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
+ if (sock < 0) {
+ return -errno;
+ }
+
+ if (bind(sock, (struct sockaddr *), sizeof(sa)) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ addrlen = sizeof(sa);
+ if (getsockname(sock, (struct sockaddr *), ) < 0) {
+ ret = errno;
+ goto cleanup;
+ }
+
+ if (addrlen != sizeof(sa)) {
+ ret = errno;
+ goto cleanup;
+ }
+
+ memset(, 0, sizeof(req));
+ req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
+ req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
+ req.nh.nlmsg_type = RTM_SETLINK;
+ req.nh.nlmsg_pid = 0;
+ req.nh.nlmsg_seq = ++seq;
+ req.ifinfo.ifi_family = AF_UNSPEC;
+ req.ifinfo.ifi_index = ifindex;
+
+ /* started nested attribute for XDP */
+ nla = (struct nlattr *)(((char *))
+ + NLMSG_ALIGN(req.nh.nlmsg_len));
+ nla->nla_type = NLA_F_NESTED | IFLA_XDP;
+ nla->nla_len = NLA_HDRLEN;
+
+ /* add XDP fd */
+ nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
+ nla_xdp->nla_type = IFLA_XDP_FD;
+ nla_xdp->nla_len = NLA_HDRLEN + sizeof(int);
+ memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(fd));
+ nla->nla_len += nla_xdp->nla_len;
+
+ /* if user passed in any flags, add those too */
+ if (flags) {
+ nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
+ nla_xdp->nla_type = IFLA_XDP_FLAGS;
+ nla_xdp->nla_len = NLA_HDRLEN + sizeof(flags);
+ memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(flags));
+ nla->nla_len += nla_xdp->nla_len;
+ }
+
+ req.nh.nlmsg_len += NLA_ALIGN(nla->nla_len);
+
+ if (send(sock, , req.nh.nlmsg_len, 0) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ len = recv(sock, buf, sizeof(buf), 0);
+ if (len < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ for (nh = (struct nlmsghdr *)buf; NLMSG_OK(nh, len);
+nh = NLMSG_NEXT(nh, len)) {
+ if (nh->nlmsg_pid != sa.nl_pid) {
+ ret = -LIBBPF_ERRNO__WRNGPID;
+ goto cleanup;
+ }
+ if (nh->nlmsg_seq != seq) {
+ ret = -LIBBPF_ERRNO__INVSEQ;
+ goto cleanup;
+ }
+ switch (nh->nlmsg_type) {
+ case NLMSG_ERROR:
+ err = (struct nlmsgerr *)NLMSG_DATA(nh);
+ if (!err->error)
+ continue;
+ ret = err->error;
+ goto cleanup;
+ case NLMSG_DONE:
+ break;
+ default:
+ break;
+ }
+ }
+
+ ret = 0;
+
+cleanup:
+ close(sock);
+ return ret;
+}
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index e9c4b7cabcf2..5fe8aaa2123e 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -106,6 +106,8 @@ static const char *libbpf_strerror_table[NR_ER
[PATCH bpf-next v2 0/4] libbpf: add function to setup XDP
Hello, This patchset address the remark about license. It now uses libnl code as a base for the netlink parsing. The library seems to report error correctly when used over a netdevsim interface. I did not manage to test it on a real hardware. Best regards, -- Eric Leblond
[PATCH 1/4] libbpf: add function to setup XDP
Most of the code is taken from set_link_xdp_fd() in bpf_load.c and
slightly modified to be library compliant.
Signed-off-by: Eric Leblond
---
tools/lib/bpf/bpf.c| 126 -
tools/lib/bpf/libbpf.c | 2 +
tools/lib/bpf/libbpf.h | 4 ++
3 files changed, 130 insertions(+), 2 deletions(-)
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index 5128677e4117..1e3cfe6b9fce 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -25,6 +25,16 @@
#include
#include
#include "bpf.h"
+#include "libbpf.h"
+#include
+#include
+#include
+
+#ifndef IFLA_XDP_MAX
+#define IFLA_XDP 43
+#define IFLA_XDP_FD1
+#define IFLA_XDP_FLAGS 3
+#endif
/*
* When building perf, unistd.h is overridden. __NR_bpf is
@@ -46,8 +56,6 @@
# endif
#endif
-#define min(x, y) ((x) < (y) ? (x) : (y))
-
static inline __u64 ptr_to_u64(const void *ptr)
{
return (__u64) (unsigned long) ptr;
@@ -413,3 +421,117 @@ int bpf_obj_get_info_by_fd(int prog_fd, void *info, __u32
*info_len)
return err;
}
+
+int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
+{
+ struct sockaddr_nl sa;
+ int sock, seq = 0, len, ret = -1;
+ char buf[4096];
+ struct nlattr *nla, *nla_xdp;
+ struct {
+ struct nlmsghdr nh;
+ struct ifinfomsg ifinfo;
+ char attrbuf[64];
+ } req;
+ struct nlmsghdr *nh;
+ struct nlmsgerr *err;
+ socklen_t addrlen;
+
+ memset(, 0, sizeof(sa));
+ sa.nl_family = AF_NETLINK;
+
+ sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
+ if (sock < 0) {
+ return -errno;
+ }
+
+ if (bind(sock, (struct sockaddr *), sizeof(sa)) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ addrlen = sizeof(sa);
+ if (getsockname(sock, (struct sockaddr *), ) < 0) {
+ ret = errno;
+ goto cleanup;
+ }
+
+ if (addrlen != sizeof(sa)) {
+ ret = errno;
+ goto cleanup;
+ }
+
+ memset(, 0, sizeof(req));
+ req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
+ req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
+ req.nh.nlmsg_type = RTM_SETLINK;
+ req.nh.nlmsg_pid = 0;
+ req.nh.nlmsg_seq = ++seq;
+ req.ifinfo.ifi_family = AF_UNSPEC;
+ req.ifinfo.ifi_index = ifindex;
+
+ /* started nested attribute for XDP */
+ nla = (struct nlattr *)(((char *))
+ + NLMSG_ALIGN(req.nh.nlmsg_len));
+ nla->nla_type = NLA_F_NESTED | IFLA_XDP;
+ nla->nla_len = NLA_HDRLEN;
+
+ /* add XDP fd */
+ nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
+ nla_xdp->nla_type = IFLA_XDP_FD;
+ nla_xdp->nla_len = NLA_HDRLEN + sizeof(int);
+ memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(fd));
+ nla->nla_len += nla_xdp->nla_len;
+
+ /* if user passed in any flags, add those too */
+ if (flags) {
+ nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
+ nla_xdp->nla_type = IFLA_XDP_FLAGS;
+ nla_xdp->nla_len = NLA_HDRLEN + sizeof(flags);
+ memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(flags));
+ nla->nla_len += nla_xdp->nla_len;
+ }
+
+ req.nh.nlmsg_len += NLA_ALIGN(nla->nla_len);
+
+ if (send(sock, , req.nh.nlmsg_len, 0) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ len = recv(sock, buf, sizeof(buf), 0);
+ if (len < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ for (nh = (struct nlmsghdr *)buf; NLMSG_OK(nh, len);
+nh = NLMSG_NEXT(nh, len)) {
+ if (nh->nlmsg_pid != sa.nl_pid) {
+ ret = -LIBBPF_ERRNO__WRNGPID;
+ goto cleanup;
+ }
+ if (nh->nlmsg_seq != seq) {
+ ret = -LIBBPF_ERRNO__INVSEQ;
+ goto cleanup;
+ }
+ switch (nh->nlmsg_type) {
+ case NLMSG_ERROR:
+ err = (struct nlmsgerr *)NLMSG_DATA(nh);
+ if (!err->error)
+ continue;
+ ret = err->error;
+ goto cleanup;
+ case NLMSG_DONE:
+ break;
+ default:
+ break;
+ }
+ }
+
+ ret = 0;
+
+cleanup:
+ close(sock);
+ return ret;
+}
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index e9c4b7cabcf2..5fe8aaa2123e 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -106,6 +106,8 @@ static const char *libbpf_strerror_table[NR_ERRNO] =
[PATCH bpf-next v2 0/4] libbpf: add function to setup XDP
Hello, This patchset address the remark about license. It now uses libnl code as a base for the netlink parsing. The library seems to report error correctly when used over a netdevsim interface. I did not manage to test it on a real hardware. Best regards, -- Eric Leblond
[PATCH bpf-next 0/3] add XDP loading support to libbpf
Hello, This patchset adds a function to load XDP eBPF file in the libbpf library. It gets the netlink extended ack from the driver in case of failure and print the error to stderr. Best regards, -- Eric Leblond
[PATCH bpf-next 3/3] libbpf: break loop earlier
Get out of the loop when we have a match.
Signed-off-by: Eric Leblond <e...@regit.org>
---
tools/lib/bpf/libbpf.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 5fe8aaa2123e..d263748aa341 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -412,6 +412,7 @@ bpf_object__init_prog_names(struct bpf_object *obj)
prog->section_name);
return -LIBBPF_ERRNO__LIBELF;
}
+ break;
}
if (!name) {
--
2.15.1
[PATCH bpf-next 0/3] add XDP loading support to libbpf
Hello, This patchset adds a function to load XDP eBPF file in the libbpf library. It gets the netlink extended ack from the driver in case of failure and print the error to stderr. Best regards, -- Eric Leblond
[PATCH bpf-next 3/3] libbpf: break loop earlier
Get out of the loop when we have a match.
Signed-off-by: Eric Leblond
---
tools/lib/bpf/libbpf.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 5fe8aaa2123e..d263748aa341 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -412,6 +412,7 @@ bpf_object__init_prog_names(struct bpf_object *obj)
prog->section_name);
return -LIBBPF_ERRNO__LIBELF;
}
+ break;
}
if (!name) {
--
2.15.1
[PATCH bpf-next 2/3] libbpf: add error reporting in XDP
Parse netlink ext attribute to get the error message returned by
the card.
Signed-off-by: Eric Leblond <e...@regit.org>
---
tools/lib/bpf/Build| 2 +-
tools/lib/bpf/bpf.c| 9 +++
tools/lib/bpf/nlattr.c | 188 +
tools/lib/bpf/nlattr.h | 164 ++
4 files changed, 362 insertions(+), 1 deletion(-)
create mode 100644 tools/lib/bpf/nlattr.c
create mode 100644 tools/lib/bpf/nlattr.h
diff --git a/tools/lib/bpf/Build b/tools/lib/bpf/Build
index d8749756352d..64c679d67109 100644
--- a/tools/lib/bpf/Build
+++ b/tools/lib/bpf/Build
@@ -1 +1 @@
-libbpf-y := libbpf.o bpf.o
+libbpf-y := libbpf.o bpf.o nlattr.o
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index 1e3cfe6b9fce..cfd30a0cbce4 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -26,6 +26,7 @@
#include
#include "bpf.h"
#include "libbpf.h"
+#include "nlattr.h"
#include
#include
#include
@@ -436,6 +437,7 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
struct nlmsghdr *nh;
struct nlmsgerr *err;
socklen_t addrlen;
+ int one;
memset(, 0, sizeof(sa));
sa.nl_family = AF_NETLINK;
@@ -445,6 +447,12 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
return -errno;
}
+ if (setsockopt(sock, SOL_NETLINK, NETLINK_EXT_ACK,
+ , sizeof(one)) < 0) {
+ /* debug/verbose message that it is not supported */
+ fprintf(stderr, "Netlink error reporting not supported\n");
+ }
+
if (bind(sock, (struct sockaddr *), sizeof(sa)) < 0) {
ret = -errno;
goto cleanup;
@@ -521,6 +529,7 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
if (!err->error)
continue;
ret = err->error;
+ nla_dump_errormsg(nh);
goto cleanup;
case NLMSG_DONE:
break;
diff --git a/tools/lib/bpf/nlattr.c b/tools/lib/bpf/nlattr.c
new file mode 100644
index ..962de14f74e3
--- /dev/null
+++ b/tools/lib/bpf/nlattr.c
@@ -0,0 +1,188 @@
+
+/*
+ * NETLINK Netlink attributes
+ *
+ * Authors:Thomas Graf <tg...@suug.ch>
+ * Alexey Kuznetsov <kuz...@ms2.inr.ac.ru>
+ */
+
+#include
+#include "nlattr.h"
+#include
+#include
+#include
+
+static const __u8 nla_attr_minlen[NLA_TYPE_MAX+1] = {
+ [NLA_U8]= sizeof(__u8),
+ [NLA_U16] = sizeof(__u16),
+ [NLA_U32] = sizeof(__u32),
+ [NLA_U64] = sizeof(__u64),
+ [NLA_MSECS] = sizeof(__u64),
+ [NLA_NESTED]= NLA_HDRLEN,
+ [NLA_S8]= sizeof(__s8),
+ [NLA_S16] = sizeof(__s16),
+ [NLA_S32] = sizeof(__s32),
+ [NLA_S64] = sizeof(__s64),
+};
+
+static int validate_nla(const struct nlattr *nla, int maxtype,
+ const struct nla_policy *policy)
+{
+ const struct nla_policy *pt;
+ int minlen = 0, attrlen = nla_len(nla), type = nla_type(nla);
+
+ if (type <= 0 || type > maxtype)
+ return 0;
+
+ pt = [type];
+
+ if (pt->type > NLA_TYPE_MAX)
+ return -EINVAL;
+
+ switch (pt->type) {
+ case NLA_FLAG:
+ if (attrlen > 0)
+ return -ERANGE;
+ break;
+
+ case NLA_NUL_STRING:
+ if (pt->len)
+ minlen = min(attrlen, pt->len + 1);
+ else
+ minlen = attrlen;
+
+ if (!minlen || memchr(nla_data(nla), '\0', minlen) == NULL)
+ return -EINVAL;
+ /* fall through */
+
+ case NLA_STRING:
+ if (attrlen < 1)
+ return -ERANGE;
+
+ if (pt->len) {
+ char *buf = nla_data(nla);
+
+ if (buf[attrlen - 1] == '\0')
+ attrlen--;
+
+ if (attrlen > pt->len)
+ return -ERANGE;
+ }
+ break;
+
+ case NLA_BINARY:
+ if (pt->len && attrlen > pt->len)
+ return -ERANGE;
+ break;
+
+ case NLA_NESTED_COMPAT:
+ if (attrlen < pt->len)
+ return -ERANGE;
+ if (attrlen < NLA_ALIGN(pt->len))
+ break;
+ if (attrlen < NLA_ALIGN(pt->len) + NLA_HDRLEN)
+ return -ERANGE;
+ nla = nla_data(nla) + NLA_ALIGN(pt->len);
+ if (attrlen < NLA_ALIGN(pt->len) + NLA_
[PATCH bpf-next 1/3] libbpf: add function to setup XDP
Most of the code is taken from set_link_xdp_fd() in bpf_load.c and
slightly modified to be library compliant.
Signed-off-by: Eric Leblond <e...@regit.org>
---
tools/lib/bpf/bpf.c| 126 -
tools/lib/bpf/libbpf.c | 2 +
tools/lib/bpf/libbpf.h | 4 ++
3 files changed, 130 insertions(+), 2 deletions(-)
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index 5128677e4117..1e3cfe6b9fce 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -25,6 +25,16 @@
#include
#include
#include "bpf.h"
+#include "libbpf.h"
+#include
+#include
+#include
+
+#ifndef IFLA_XDP_MAX
+#define IFLA_XDP 43
+#define IFLA_XDP_FD1
+#define IFLA_XDP_FLAGS 3
+#endif
/*
* When building perf, unistd.h is overridden. __NR_bpf is
@@ -46,8 +56,6 @@
# endif
#endif
-#define min(x, y) ((x) < (y) ? (x) : (y))
-
static inline __u64 ptr_to_u64(const void *ptr)
{
return (__u64) (unsigned long) ptr;
@@ -413,3 +421,117 @@ int bpf_obj_get_info_by_fd(int prog_fd, void *info, __u32
*info_len)
return err;
}
+
+int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
+{
+ struct sockaddr_nl sa;
+ int sock, seq = 0, len, ret = -1;
+ char buf[4096];
+ struct nlattr *nla, *nla_xdp;
+ struct {
+ struct nlmsghdr nh;
+ struct ifinfomsg ifinfo;
+ char attrbuf[64];
+ } req;
+ struct nlmsghdr *nh;
+ struct nlmsgerr *err;
+ socklen_t addrlen;
+
+ memset(, 0, sizeof(sa));
+ sa.nl_family = AF_NETLINK;
+
+ sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
+ if (sock < 0) {
+ return -errno;
+ }
+
+ if (bind(sock, (struct sockaddr *), sizeof(sa)) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ addrlen = sizeof(sa);
+ if (getsockname(sock, (struct sockaddr *), ) < 0) {
+ ret = errno;
+ goto cleanup;
+ }
+
+ if (addrlen != sizeof(sa)) {
+ ret = errno;
+ goto cleanup;
+ }
+
+ memset(, 0, sizeof(req));
+ req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
+ req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
+ req.nh.nlmsg_type = RTM_SETLINK;
+ req.nh.nlmsg_pid = 0;
+ req.nh.nlmsg_seq = ++seq;
+ req.ifinfo.ifi_family = AF_UNSPEC;
+ req.ifinfo.ifi_index = ifindex;
+
+ /* started nested attribute for XDP */
+ nla = (struct nlattr *)(((char *))
+ + NLMSG_ALIGN(req.nh.nlmsg_len));
+ nla->nla_type = NLA_F_NESTED | IFLA_XDP;
+ nla->nla_len = NLA_HDRLEN;
+
+ /* add XDP fd */
+ nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
+ nla_xdp->nla_type = IFLA_XDP_FD;
+ nla_xdp->nla_len = NLA_HDRLEN + sizeof(int);
+ memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(fd));
+ nla->nla_len += nla_xdp->nla_len;
+
+ /* if user passed in any flags, add those too */
+ if (flags) {
+ nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
+ nla_xdp->nla_type = IFLA_XDP_FLAGS;
+ nla_xdp->nla_len = NLA_HDRLEN + sizeof(flags);
+ memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(flags));
+ nla->nla_len += nla_xdp->nla_len;
+ }
+
+ req.nh.nlmsg_len += NLA_ALIGN(nla->nla_len);
+
+ if (send(sock, , req.nh.nlmsg_len, 0) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ len = recv(sock, buf, sizeof(buf), 0);
+ if (len < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ for (nh = (struct nlmsghdr *)buf; NLMSG_OK(nh, len);
+nh = NLMSG_NEXT(nh, len)) {
+ if (nh->nlmsg_pid != sa.nl_pid) {
+ ret = -LIBBPF_ERRNO__WRNGPID;
+ goto cleanup;
+ }
+ if (nh->nlmsg_seq != seq) {
+ ret = -LIBBPF_ERRNO__INVSEQ;
+ goto cleanup;
+ }
+ switch (nh->nlmsg_type) {
+ case NLMSG_ERROR:
+ err = (struct nlmsgerr *)NLMSG_DATA(nh);
+ if (!err->error)
+ continue;
+ ret = err->error;
+ goto cleanup;
+ case NLMSG_DONE:
+ break;
+ default:
+ break;
+ }
+ }
+
+ ret = 0;
+
+cleanup:
+ close(sock);
+ return ret;
+}
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index e9c4b7cabcf2..5fe8aaa2123e 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -106,6 +106,8 @@ static const char *libbpf_strerror_table[NR_ER
[PATCH bpf-next 2/3] libbpf: add error reporting in XDP
Parse netlink ext attribute to get the error message returned by
the card.
Signed-off-by: Eric Leblond
---
tools/lib/bpf/Build| 2 +-
tools/lib/bpf/bpf.c| 9 +++
tools/lib/bpf/nlattr.c | 188 +
tools/lib/bpf/nlattr.h | 164 ++
4 files changed, 362 insertions(+), 1 deletion(-)
create mode 100644 tools/lib/bpf/nlattr.c
create mode 100644 tools/lib/bpf/nlattr.h
diff --git a/tools/lib/bpf/Build b/tools/lib/bpf/Build
index d8749756352d..64c679d67109 100644
--- a/tools/lib/bpf/Build
+++ b/tools/lib/bpf/Build
@@ -1 +1 @@
-libbpf-y := libbpf.o bpf.o
+libbpf-y := libbpf.o bpf.o nlattr.o
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index 1e3cfe6b9fce..cfd30a0cbce4 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -26,6 +26,7 @@
#include
#include "bpf.h"
#include "libbpf.h"
+#include "nlattr.h"
#include
#include
#include
@@ -436,6 +437,7 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
struct nlmsghdr *nh;
struct nlmsgerr *err;
socklen_t addrlen;
+ int one;
memset(, 0, sizeof(sa));
sa.nl_family = AF_NETLINK;
@@ -445,6 +447,12 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
return -errno;
}
+ if (setsockopt(sock, SOL_NETLINK, NETLINK_EXT_ACK,
+ , sizeof(one)) < 0) {
+ /* debug/verbose message that it is not supported */
+ fprintf(stderr, "Netlink error reporting not supported\n");
+ }
+
if (bind(sock, (struct sockaddr *), sizeof(sa)) < 0) {
ret = -errno;
goto cleanup;
@@ -521,6 +529,7 @@ int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
if (!err->error)
continue;
ret = err->error;
+ nla_dump_errormsg(nh);
goto cleanup;
case NLMSG_DONE:
break;
diff --git a/tools/lib/bpf/nlattr.c b/tools/lib/bpf/nlattr.c
new file mode 100644
index ..962de14f74e3
--- /dev/null
+++ b/tools/lib/bpf/nlattr.c
@@ -0,0 +1,188 @@
+
+/*
+ * NETLINK Netlink attributes
+ *
+ * Authors:Thomas Graf
+ * Alexey Kuznetsov
+ */
+
+#include
+#include "nlattr.h"
+#include
+#include
+#include
+
+static const __u8 nla_attr_minlen[NLA_TYPE_MAX+1] = {
+ [NLA_U8]= sizeof(__u8),
+ [NLA_U16] = sizeof(__u16),
+ [NLA_U32] = sizeof(__u32),
+ [NLA_U64] = sizeof(__u64),
+ [NLA_MSECS] = sizeof(__u64),
+ [NLA_NESTED]= NLA_HDRLEN,
+ [NLA_S8]= sizeof(__s8),
+ [NLA_S16] = sizeof(__s16),
+ [NLA_S32] = sizeof(__s32),
+ [NLA_S64] = sizeof(__s64),
+};
+
+static int validate_nla(const struct nlattr *nla, int maxtype,
+ const struct nla_policy *policy)
+{
+ const struct nla_policy *pt;
+ int minlen = 0, attrlen = nla_len(nla), type = nla_type(nla);
+
+ if (type <= 0 || type > maxtype)
+ return 0;
+
+ pt = [type];
+
+ if (pt->type > NLA_TYPE_MAX)
+ return -EINVAL;
+
+ switch (pt->type) {
+ case NLA_FLAG:
+ if (attrlen > 0)
+ return -ERANGE;
+ break;
+
+ case NLA_NUL_STRING:
+ if (pt->len)
+ minlen = min(attrlen, pt->len + 1);
+ else
+ minlen = attrlen;
+
+ if (!minlen || memchr(nla_data(nla), '\0', minlen) == NULL)
+ return -EINVAL;
+ /* fall through */
+
+ case NLA_STRING:
+ if (attrlen < 1)
+ return -ERANGE;
+
+ if (pt->len) {
+ char *buf = nla_data(nla);
+
+ if (buf[attrlen - 1] == '\0')
+ attrlen--;
+
+ if (attrlen > pt->len)
+ return -ERANGE;
+ }
+ break;
+
+ case NLA_BINARY:
+ if (pt->len && attrlen > pt->len)
+ return -ERANGE;
+ break;
+
+ case NLA_NESTED_COMPAT:
+ if (attrlen < pt->len)
+ return -ERANGE;
+ if (attrlen < NLA_ALIGN(pt->len))
+ break;
+ if (attrlen < NLA_ALIGN(pt->len) + NLA_HDRLEN)
+ return -ERANGE;
+ nla = nla_data(nla) + NLA_ALIGN(pt->len);
+ if (attrlen < NLA_ALIGN(pt->len) + NLA_HDRLEN + nla_len(nla))
+ return -ERANGE;
+
[PATCH bpf-next 1/3] libbpf: add function to setup XDP
Most of the code is taken from set_link_xdp_fd() in bpf_load.c and
slightly modified to be library compliant.
Signed-off-by: Eric Leblond
---
tools/lib/bpf/bpf.c| 126 -
tools/lib/bpf/libbpf.c | 2 +
tools/lib/bpf/libbpf.h | 4 ++
3 files changed, 130 insertions(+), 2 deletions(-)
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index 5128677e4117..1e3cfe6b9fce 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -25,6 +25,16 @@
#include
#include
#include "bpf.h"
+#include "libbpf.h"
+#include
+#include
+#include
+
+#ifndef IFLA_XDP_MAX
+#define IFLA_XDP 43
+#define IFLA_XDP_FD1
+#define IFLA_XDP_FLAGS 3
+#endif
/*
* When building perf, unistd.h is overridden. __NR_bpf is
@@ -46,8 +56,6 @@
# endif
#endif
-#define min(x, y) ((x) < (y) ? (x) : (y))
-
static inline __u64 ptr_to_u64(const void *ptr)
{
return (__u64) (unsigned long) ptr;
@@ -413,3 +421,117 @@ int bpf_obj_get_info_by_fd(int prog_fd, void *info, __u32
*info_len)
return err;
}
+
+int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
+{
+ struct sockaddr_nl sa;
+ int sock, seq = 0, len, ret = -1;
+ char buf[4096];
+ struct nlattr *nla, *nla_xdp;
+ struct {
+ struct nlmsghdr nh;
+ struct ifinfomsg ifinfo;
+ char attrbuf[64];
+ } req;
+ struct nlmsghdr *nh;
+ struct nlmsgerr *err;
+ socklen_t addrlen;
+
+ memset(, 0, sizeof(sa));
+ sa.nl_family = AF_NETLINK;
+
+ sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
+ if (sock < 0) {
+ return -errno;
+ }
+
+ if (bind(sock, (struct sockaddr *), sizeof(sa)) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ addrlen = sizeof(sa);
+ if (getsockname(sock, (struct sockaddr *), ) < 0) {
+ ret = errno;
+ goto cleanup;
+ }
+
+ if (addrlen != sizeof(sa)) {
+ ret = errno;
+ goto cleanup;
+ }
+
+ memset(, 0, sizeof(req));
+ req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
+ req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
+ req.nh.nlmsg_type = RTM_SETLINK;
+ req.nh.nlmsg_pid = 0;
+ req.nh.nlmsg_seq = ++seq;
+ req.ifinfo.ifi_family = AF_UNSPEC;
+ req.ifinfo.ifi_index = ifindex;
+
+ /* started nested attribute for XDP */
+ nla = (struct nlattr *)(((char *))
+ + NLMSG_ALIGN(req.nh.nlmsg_len));
+ nla->nla_type = NLA_F_NESTED | IFLA_XDP;
+ nla->nla_len = NLA_HDRLEN;
+
+ /* add XDP fd */
+ nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
+ nla_xdp->nla_type = IFLA_XDP_FD;
+ nla_xdp->nla_len = NLA_HDRLEN + sizeof(int);
+ memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(fd));
+ nla->nla_len += nla_xdp->nla_len;
+
+ /* if user passed in any flags, add those too */
+ if (flags) {
+ nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
+ nla_xdp->nla_type = IFLA_XDP_FLAGS;
+ nla_xdp->nla_len = NLA_HDRLEN + sizeof(flags);
+ memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(flags));
+ nla->nla_len += nla_xdp->nla_len;
+ }
+
+ req.nh.nlmsg_len += NLA_ALIGN(nla->nla_len);
+
+ if (send(sock, , req.nh.nlmsg_len, 0) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ len = recv(sock, buf, sizeof(buf), 0);
+ if (len < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ for (nh = (struct nlmsghdr *)buf; NLMSG_OK(nh, len);
+nh = NLMSG_NEXT(nh, len)) {
+ if (nh->nlmsg_pid != sa.nl_pid) {
+ ret = -LIBBPF_ERRNO__WRNGPID;
+ goto cleanup;
+ }
+ if (nh->nlmsg_seq != seq) {
+ ret = -LIBBPF_ERRNO__INVSEQ;
+ goto cleanup;
+ }
+ switch (nh->nlmsg_type) {
+ case NLMSG_ERROR:
+ err = (struct nlmsgerr *)NLMSG_DATA(nh);
+ if (!err->error)
+ continue;
+ ret = err->error;
+ goto cleanup;
+ case NLMSG_DONE:
+ break;
+ default:
+ break;
+ }
+ }
+
+ ret = 0;
+
+cleanup:
+ close(sock);
+ return ret;
+}
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index e9c4b7cabcf2..5fe8aaa2123e 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -106,6 +106,8 @@ static const char *libbpf_strerror_table[NR_ERRNO] =
Re: [PATCH net-next] libbpf: add function to setup XDP
Hello,
On Sat, 2017-12-09 at 15:57 -0800, Jakub Kicinski wrote:
> On Sat, 9 Dec 2017 15:43:15 +0100, Eric Leblond wrote:
> > + for (nh = (struct nlmsghdr *)buf; NLMSG_OK(nh, len);
> > +nh = NLMSG_NEXT(nh, len)) {
> > + if (nh->nlmsg_pid != getpid()) {
> > + ret = -LIBBPF_ERRNO__WRNGPID;
> > + goto cleanup;
> > + }
> > + if (nh->nlmsg_seq != seq) {
> > + ret = -LIBBPF_ERRNO__INVSEQ;
> > + goto cleanup;
> > + }
> > + switch (nh->nlmsg_type) {
> > + case NLMSG_ERROR:
> > + err = (struct nlmsgerr *)NLMSG_DATA(nh);
> > + if (!err->error)
> > + continue;
> > + ret = err->error;
> > + goto cleanup;
> > + case NLMSG_DONE:
> > + break;
> > + default:
> > + break;
> > + }
>
> Would it be possible to print out or preferably return to the caller
> the ext ack error message? A couple of drivers are using it for XDP
> mis-configuration reporting instead of printks. We should encourage
> other to do the same and support it in all user space since ext ack
> msgs lead to much better user experience.
I've seen the kind of messages displayed by reading at kernel log. They
are really useful and it looks almost mandatory to be able to display
them.
Kernel code seems to not have a parser for the ext ack error message.
Did I miss something here ?
Looking at tc code, it seems it is using libmnl to parse them and I
doubt it is a good idea to use that in libbpf as it is introducing a
dependency.
Does someone has an existing parsing code or should I write on my own ?
BR,
--
Eric Leblond <e...@regit.org>
Blog: https://home.regit.org/
Re: [PATCH net-next] libbpf: add function to setup XDP
Hello,
On Sat, 2017-12-09 at 15:57 -0800, Jakub Kicinski wrote:
> On Sat, 9 Dec 2017 15:43:15 +0100, Eric Leblond wrote:
> > + for (nh = (struct nlmsghdr *)buf; NLMSG_OK(nh, len);
> > +nh = NLMSG_NEXT(nh, len)) {
> > + if (nh->nlmsg_pid != getpid()) {
> > + ret = -LIBBPF_ERRNO__WRNGPID;
> > + goto cleanup;
> > + }
> > + if (nh->nlmsg_seq != seq) {
> > + ret = -LIBBPF_ERRNO__INVSEQ;
> > + goto cleanup;
> > + }
> > + switch (nh->nlmsg_type) {
> > + case NLMSG_ERROR:
> > + err = (struct nlmsgerr *)NLMSG_DATA(nh);
> > + if (!err->error)
> > + continue;
> > + ret = err->error;
> > + goto cleanup;
> > + case NLMSG_DONE:
> > + break;
> > + default:
> > + break;
> > + }
>
> Would it be possible to print out or preferably return to the caller
> the ext ack error message? A couple of drivers are using it for XDP
> mis-configuration reporting instead of printks. We should encourage
> other to do the same and support it in all user space since ext ack
> msgs lead to much better user experience.
I've seen the kind of messages displayed by reading at kernel log. They
are really useful and it looks almost mandatory to be able to display
them.
Kernel code seems to not have a parser for the ext ack error message.
Did I miss something here ?
Looking at tc code, it seems it is using libmnl to parse them and I
doubt it is a good idea to use that in libbpf as it is introducing a
dependency.
Does someone has an existing parsing code or should I write on my own ?
BR,
--
Eric Leblond
Blog: https://home.regit.org/
[PATCH net-next] libbpf: add function to setup XDP
Most of the code is taken from set_link_xdp_fd() in bpf_load.c and
slightly modified to be library compliant.
Signed-off-by: Eric Leblond <e...@regit.org>
---
tools/lib/bpf/bpf.c| 108 -
tools/lib/bpf/libbpf.c | 2 +
tools/lib/bpf/libbpf.h | 4 ++
3 files changed, 112 insertions(+), 2 deletions(-)
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index 5128677e4117..bea173be66fc 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -25,6 +25,10 @@
#include
#include
#include "bpf.h"
+#include "libbpf.h"
+#include
+#include
+#include
/*
* When building perf, unistd.h is overridden. __NR_bpf is
@@ -46,8 +50,6 @@
# endif
#endif
-#define min(x, y) ((x) < (y) ? (x) : (y))
-
static inline __u64 ptr_to_u64(const void *ptr)
{
return (__u64) (unsigned long) ptr;
@@ -413,3 +415,105 @@ int bpf_obj_get_info_by_fd(int prog_fd, void *info, __u32
*info_len)
return err;
}
+
+int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
+{
+ struct sockaddr_nl sa;
+ int sock, seq = 0, len, ret = -1;
+ char buf[4096];
+ struct nlattr *nla, *nla_xdp;
+ struct {
+ struct nlmsghdr nh;
+ struct ifinfomsg ifinfo;
+ char attrbuf[64];
+ } req;
+ struct nlmsghdr *nh;
+ struct nlmsgerr *err;
+
+ memset(, 0, sizeof(sa));
+ sa.nl_family = AF_NETLINK;
+
+ sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
+ if (sock < 0) {
+ return -errno;
+ }
+
+ if (bind(sock, (struct sockaddr *), sizeof(sa)) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ memset(, 0, sizeof(req));
+ req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
+ req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
+ req.nh.nlmsg_type = RTM_SETLINK;
+ req.nh.nlmsg_pid = 0;
+ req.nh.nlmsg_seq = ++seq;
+ req.ifinfo.ifi_family = AF_UNSPEC;
+ req.ifinfo.ifi_index = ifindex;
+
+ /* started nested attribute for XDP */
+ nla = (struct nlattr *)(((char *))
+ + NLMSG_ALIGN(req.nh.nlmsg_len));
+ nla->nla_type = NLA_F_NESTED | 43/*IFLA_XDP*/;
+ nla->nla_len = NLA_HDRLEN;
+
+ /* add XDP fd */
+ nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
+ nla_xdp->nla_type = 1/*IFLA_XDP_FD*/;
+ nla_xdp->nla_len = NLA_HDRLEN + sizeof(int);
+ memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(fd));
+ nla->nla_len += nla_xdp->nla_len;
+
+ /* if user passed in any flags, add those too */
+ if (flags) {
+ nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
+ nla_xdp->nla_type = 3/*IFLA_XDP_FLAGS*/;
+ nla_xdp->nla_len = NLA_HDRLEN + sizeof(flags);
+ memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(flags));
+ nla->nla_len += nla_xdp->nla_len;
+ }
+
+ req.nh.nlmsg_len += NLA_ALIGN(nla->nla_len);
+
+ if (send(sock, , req.nh.nlmsg_len, 0) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ len = recv(sock, buf, sizeof(buf), 0);
+ if (len < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ for (nh = (struct nlmsghdr *)buf; NLMSG_OK(nh, len);
+nh = NLMSG_NEXT(nh, len)) {
+ if (nh->nlmsg_pid != getpid()) {
+ ret = -LIBBPF_ERRNO__WRNGPID;
+ goto cleanup;
+ }
+ if (nh->nlmsg_seq != seq) {
+ ret = -LIBBPF_ERRNO__INVSEQ;
+ goto cleanup;
+ }
+ switch (nh->nlmsg_type) {
+ case NLMSG_ERROR:
+ err = (struct nlmsgerr *)NLMSG_DATA(nh);
+ if (!err->error)
+ continue;
+ ret = err->error;
+ goto cleanup;
+ case NLMSG_DONE:
+ break;
+ default:
+ break;
+ }
+ }
+
+ ret = 0;
+
+cleanup:
+ close(sock);
+ return ret;
+}
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 5aa45f89da93..931e98c097a8 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -106,6 +106,8 @@ static const char *libbpf_strerror_table[NR_ERRNO] = {
[ERRCODE_OFFSET(PROG2BIG)] = "Program too big",
[ERRCODE_OFFSET(KVER)] = "Incorrect kernel version",
[ERRCODE_OFFSET(PROGTYPE)] = "Kernel doesn't support this program
type",
+ [ERRCODE_OFFSET(WRNGPID)] = "Wrong pid in netlink message",
+ [ERRCODE_OFFSET(INVSEQ)]= "Invalid
[PATCH net-next] libbpf: add function to setup XDP
Most of the code is taken from set_link_xdp_fd() in bpf_load.c and
slightly modified to be library compliant.
Signed-off-by: Eric Leblond
---
tools/lib/bpf/bpf.c| 108 -
tools/lib/bpf/libbpf.c | 2 +
tools/lib/bpf/libbpf.h | 4 ++
3 files changed, 112 insertions(+), 2 deletions(-)
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index 5128677e4117..bea173be66fc 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -25,6 +25,10 @@
#include
#include
#include "bpf.h"
+#include "libbpf.h"
+#include
+#include
+#include
/*
* When building perf, unistd.h is overridden. __NR_bpf is
@@ -46,8 +50,6 @@
# endif
#endif
-#define min(x, y) ((x) < (y) ? (x) : (y))
-
static inline __u64 ptr_to_u64(const void *ptr)
{
return (__u64) (unsigned long) ptr;
@@ -413,3 +415,105 @@ int bpf_obj_get_info_by_fd(int prog_fd, void *info, __u32
*info_len)
return err;
}
+
+int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
+{
+ struct sockaddr_nl sa;
+ int sock, seq = 0, len, ret = -1;
+ char buf[4096];
+ struct nlattr *nla, *nla_xdp;
+ struct {
+ struct nlmsghdr nh;
+ struct ifinfomsg ifinfo;
+ char attrbuf[64];
+ } req;
+ struct nlmsghdr *nh;
+ struct nlmsgerr *err;
+
+ memset(, 0, sizeof(sa));
+ sa.nl_family = AF_NETLINK;
+
+ sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
+ if (sock < 0) {
+ return -errno;
+ }
+
+ if (bind(sock, (struct sockaddr *), sizeof(sa)) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ memset(, 0, sizeof(req));
+ req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
+ req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
+ req.nh.nlmsg_type = RTM_SETLINK;
+ req.nh.nlmsg_pid = 0;
+ req.nh.nlmsg_seq = ++seq;
+ req.ifinfo.ifi_family = AF_UNSPEC;
+ req.ifinfo.ifi_index = ifindex;
+
+ /* started nested attribute for XDP */
+ nla = (struct nlattr *)(((char *))
+ + NLMSG_ALIGN(req.nh.nlmsg_len));
+ nla->nla_type = NLA_F_NESTED | 43/*IFLA_XDP*/;
+ nla->nla_len = NLA_HDRLEN;
+
+ /* add XDP fd */
+ nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
+ nla_xdp->nla_type = 1/*IFLA_XDP_FD*/;
+ nla_xdp->nla_len = NLA_HDRLEN + sizeof(int);
+ memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(fd));
+ nla->nla_len += nla_xdp->nla_len;
+
+ /* if user passed in any flags, add those too */
+ if (flags) {
+ nla_xdp = (struct nlattr *)((char *)nla + nla->nla_len);
+ nla_xdp->nla_type = 3/*IFLA_XDP_FLAGS*/;
+ nla_xdp->nla_len = NLA_HDRLEN + sizeof(flags);
+ memcpy((char *)nla_xdp + NLA_HDRLEN, , sizeof(flags));
+ nla->nla_len += nla_xdp->nla_len;
+ }
+
+ req.nh.nlmsg_len += NLA_ALIGN(nla->nla_len);
+
+ if (send(sock, , req.nh.nlmsg_len, 0) < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ len = recv(sock, buf, sizeof(buf), 0);
+ if (len < 0) {
+ ret = -errno;
+ goto cleanup;
+ }
+
+ for (nh = (struct nlmsghdr *)buf; NLMSG_OK(nh, len);
+nh = NLMSG_NEXT(nh, len)) {
+ if (nh->nlmsg_pid != getpid()) {
+ ret = -LIBBPF_ERRNO__WRNGPID;
+ goto cleanup;
+ }
+ if (nh->nlmsg_seq != seq) {
+ ret = -LIBBPF_ERRNO__INVSEQ;
+ goto cleanup;
+ }
+ switch (nh->nlmsg_type) {
+ case NLMSG_ERROR:
+ err = (struct nlmsgerr *)NLMSG_DATA(nh);
+ if (!err->error)
+ continue;
+ ret = err->error;
+ goto cleanup;
+ case NLMSG_DONE:
+ break;
+ default:
+ break;
+ }
+ }
+
+ ret = 0;
+
+cleanup:
+ close(sock);
+ return ret;
+}
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 5aa45f89da93..931e98c097a8 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -106,6 +106,8 @@ static const char *libbpf_strerror_table[NR_ERRNO] = {
[ERRCODE_OFFSET(PROG2BIG)] = "Program too big",
[ERRCODE_OFFSET(KVER)] = "Incorrect kernel version",
[ERRCODE_OFFSET(PROGTYPE)] = "Kernel doesn't support this program
type",
+ [ERRCODE_OFFSET(WRNGPID)] = "Wrong pid in netlink message",
+ [ERRCODE_OFFSET(INVSEQ)]= "Invalid netlink seq
[tip:perf/core] tools lib bpf: Fix maps resolution
Commit-ID: 4708bbda5cb2f6cdc331744597527143f46394d5
Gitweb: http://git.kernel.org/tip/4708bbda5cb2f6cdc331744597527143f46394d5
Author: Eric Leblond <e...@regit.org>
AuthorDate: Tue, 15 Nov 2016 04:05:47 +
Committer: Arnaldo Carvalho de Melo <a...@redhat.com>
CommitDate: Fri, 25 Nov 2016 11:27:33 -0300
tools lib bpf: Fix maps resolution
It is not correct to assimilate the elf data of the maps section to an
array of map definition. In fact the sizes differ. The offset provided
in the symbol section has to be used instead.
This patch fixes a bug causing a elf with two maps not to load
correctly.
Wang Nan added:
This patch requires a name for each BPF map, so array of BPF maps is not
allowed. This restriction is reasonable, because kernel verifier forbid
indexing BPF map from such array unless the index is a fixed value, but
if the index is fixed why not merging it into name?
For example:
Program like this:
...
unsigned long cpu = get_smp_processor_id();
int *pval = map_lookup_elem(_array[cpu], );
...
Generates bytecode like this:
0: (b7) r1 = 0
1: (63) *(u32 *)(r10 -4) = r1
2: (b7) r1 = 680997
3: (63) *(u32 *)(r10 -8) = r1
4: (85) call 8
5: (67) r0 <<= 4
6: (18) r1 = 0x112dd000
8: (0f) r0 += r1
9: (bf) r2 = r10
10: (07) r2 += -4
11: (bf) r1 = r0
12: (85) call 1
Where instruction 8 is the computation, 8 and 11 render r1 to an invalid
value for function map_lookup_elem, causes verifier report error.
Signed-off-by: Eric Leblond <e...@regit.org>
Cc: Alexei Starovoitov <a...@fb.com>
Cc: He Kuang <heku...@huawei.com>
Cc: Wang Nan <wangn...@huawei.com>
[ Merge bpf_object__init_maps_name into bpf_object__init_maps.
Fix segfault for buggy BPF script Validate obj->maps ]
Cc: Zefan Li <lize...@huawei.com>
Cc: pi3or...@163.com
Link: http://lkml.kernel.org/r/20161115040617.69788-5-wangn...@huawei.com
Signed-off-by: Wang Nan <wangn...@huawei.com>
Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com>
---
tools/lib/bpf/libbpf.c | 142 ++---
1 file changed, 98 insertions(+), 44 deletions(-)
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index b699aea..96a2b2f 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -185,6 +185,7 @@ struct bpf_program {
struct bpf_map {
int fd;
char *name;
+ size_t offset;
struct bpf_map_def def;
void *priv;
bpf_map_clear_priv_t clear_priv;
@@ -513,57 +514,106 @@ bpf_object__init_kversion(struct bpf_object *obj,
}
static int
-bpf_object__init_maps(struct bpf_object *obj, void *data,
- size_t size)
+bpf_object__validate_maps(struct bpf_object *obj)
{
- size_t nr_maps;
int i;
- nr_maps = size / sizeof(struct bpf_map_def);
- if (!data || !nr_maps) {
- pr_debug("%s doesn't need map definition\n",
-obj->path);
+ /*
+* If there's only 1 map, the only error case should have been
+* catched in bpf_object__init_maps().
+*/
+ if (!obj->maps || !obj->nr_maps || (obj->nr_maps == 1))
return 0;
- }
- pr_debug("maps in %s: %zd bytes\n", obj->path, size);
+ for (i = 1; i < obj->nr_maps; i++) {
+ const struct bpf_map *a = >maps[i - 1];
+ const struct bpf_map *b = >maps[i];
- obj->maps = calloc(nr_maps, sizeof(obj->maps[0]));
- if (!obj->maps) {
- pr_warning("alloc maps for object failed\n");
- return -ENOMEM;
+ if (b->offset - a->offset < sizeof(struct bpf_map_def)) {
+ pr_warning("corrupted map section in %s: map \"%s\" too
small\n",
+ obj->path, a->name);
+ return -EINVAL;
+ }
}
- obj->nr_maps = nr_maps;
-
- for (i = 0; i < nr_maps; i++) {
- struct bpf_map_def *def = >maps[i].def;
+ return 0;
+}
- /*
-* fill all fd with -1 so won't close incorrect
-* fd (fd=0 is stdin) when failure (zclose won't close
-* negative fd)).
-*/
- obj->maps[i].fd = -1;
+static int compare_bpf_map(const void *_a, const void *_b)
+{
+ const struct bpf_map *a = _a;
+ const struct bpf_map *b = _b;
- /* Save map definition into obj->maps */
- *def = ((struct bpf_map_def *)data)[i];
- }
- return 0;
+ return a->offset - b->offset;
}
static int
-bpf_object__init_maps_name(struct bpf_object *obj)
+bpf_object__init_maps(struct bpf_object *obj)
{
- int i;
+ int i, map_idx, nr_maps = 0;
+ Elf_Scn *scn;
+ Elf_Data *data;
Elf_Data *symbols = obj
[tip:perf/core] tools lib bpf: Fix maps resolution
Commit-ID: 4708bbda5cb2f6cdc331744597527143f46394d5
Gitweb: http://git.kernel.org/tip/4708bbda5cb2f6cdc331744597527143f46394d5
Author: Eric Leblond
AuthorDate: Tue, 15 Nov 2016 04:05:47 +
Committer: Arnaldo Carvalho de Melo
CommitDate: Fri, 25 Nov 2016 11:27:33 -0300
tools lib bpf: Fix maps resolution
It is not correct to assimilate the elf data of the maps section to an
array of map definition. In fact the sizes differ. The offset provided
in the symbol section has to be used instead.
This patch fixes a bug causing a elf with two maps not to load
correctly.
Wang Nan added:
This patch requires a name for each BPF map, so array of BPF maps is not
allowed. This restriction is reasonable, because kernel verifier forbid
indexing BPF map from such array unless the index is a fixed value, but
if the index is fixed why not merging it into name?
For example:
Program like this:
...
unsigned long cpu = get_smp_processor_id();
int *pval = map_lookup_elem(_array[cpu], );
...
Generates bytecode like this:
0: (b7) r1 = 0
1: (63) *(u32 *)(r10 -4) = r1
2: (b7) r1 = 680997
3: (63) *(u32 *)(r10 -8) = r1
4: (85) call 8
5: (67) r0 <<= 4
6: (18) r1 = 0x112dd000
8: (0f) r0 += r1
9: (bf) r2 = r10
10: (07) r2 += -4
11: (bf) r1 = r0
12: (85) call 1
Where instruction 8 is the computation, 8 and 11 render r1 to an invalid
value for function map_lookup_elem, causes verifier report error.
Signed-off-by: Eric Leblond
Cc: Alexei Starovoitov
Cc: He Kuang
Cc: Wang Nan
[ Merge bpf_object__init_maps_name into bpf_object__init_maps.
Fix segfault for buggy BPF script Validate obj->maps ]
Cc: Zefan Li
Cc: pi3or...@163.com
Link: http://lkml.kernel.org/r/20161115040617.69788-5-wangn...@huawei.com
Signed-off-by: Wang Nan
Signed-off-by: Arnaldo Carvalho de Melo
---
tools/lib/bpf/libbpf.c | 142 ++---
1 file changed, 98 insertions(+), 44 deletions(-)
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index b699aea..96a2b2f 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -185,6 +185,7 @@ struct bpf_program {
struct bpf_map {
int fd;
char *name;
+ size_t offset;
struct bpf_map_def def;
void *priv;
bpf_map_clear_priv_t clear_priv;
@@ -513,57 +514,106 @@ bpf_object__init_kversion(struct bpf_object *obj,
}
static int
-bpf_object__init_maps(struct bpf_object *obj, void *data,
- size_t size)
+bpf_object__validate_maps(struct bpf_object *obj)
{
- size_t nr_maps;
int i;
- nr_maps = size / sizeof(struct bpf_map_def);
- if (!data || !nr_maps) {
- pr_debug("%s doesn't need map definition\n",
-obj->path);
+ /*
+* If there's only 1 map, the only error case should have been
+* catched in bpf_object__init_maps().
+*/
+ if (!obj->maps || !obj->nr_maps || (obj->nr_maps == 1))
return 0;
- }
- pr_debug("maps in %s: %zd bytes\n", obj->path, size);
+ for (i = 1; i < obj->nr_maps; i++) {
+ const struct bpf_map *a = >maps[i - 1];
+ const struct bpf_map *b = >maps[i];
- obj->maps = calloc(nr_maps, sizeof(obj->maps[0]));
- if (!obj->maps) {
- pr_warning("alloc maps for object failed\n");
- return -ENOMEM;
+ if (b->offset - a->offset < sizeof(struct bpf_map_def)) {
+ pr_warning("corrupted map section in %s: map \"%s\" too
small\n",
+ obj->path, a->name);
+ return -EINVAL;
+ }
}
- obj->nr_maps = nr_maps;
-
- for (i = 0; i < nr_maps; i++) {
- struct bpf_map_def *def = >maps[i].def;
+ return 0;
+}
- /*
-* fill all fd with -1 so won't close incorrect
-* fd (fd=0 is stdin) when failure (zclose won't close
-* negative fd)).
-*/
- obj->maps[i].fd = -1;
+static int compare_bpf_map(const void *_a, const void *_b)
+{
+ const struct bpf_map *a = _a;
+ const struct bpf_map *b = _b;
- /* Save map definition into obj->maps */
- *def = ((struct bpf_map_def *)data)[i];
- }
- return 0;
+ return a->offset - b->offset;
}
static int
-bpf_object__init_maps_name(struct bpf_object *obj)
+bpf_object__init_maps(struct bpf_object *obj)
{
- int i;
+ int i, map_idx, nr_maps = 0;
+ Elf_Scn *scn;
+ Elf_Data *data;
Elf_Data *symbols = obj->efile.symbols;
- if (!symbols || obj->efile.maps_shndx < 0)
+ if (obj->efile.maps_shndx < 0)
+ return -EINVAL;
+ if (!symbols)
+ return -EINVAL;
+
Re: [PATCH 7/8] tools lib bpf: fix maps resolution
Hi, On Tue, 2016-11-08 at 02:23 +0800, Wangnan (F) wrote: > Hi Eric, > > Are you still working in this patch set? Sorry to lag on this, I've been taken by a series of other projects. I did not yet reworked it yet but I was planning to do a bit on it this week. > > Now I know why maps section is not a simple array > from a patch set from Joe Stringer: > > https://www.mail-archive.com/netdev@vger.kernel.org/msg135088.html > > So I think this patch is really useful. > > Are you going to resend the whole patch set? If not, let me collect > this patch 7/8 into my local code base and send to Arnaldo > with my other patches. If ok with you, I propose that you collect patch 7/8 it you have no news from me on Friday. If an issue for you, just collect it now and I will synchronize with updated code when resending my patchset. BR, -- Eric Leblond <e...@regit.org> Blog: https://home.regit.org/
Re: [PATCH 7/8] tools lib bpf: fix maps resolution
Hi, On Tue, 2016-11-08 at 02:23 +0800, Wangnan (F) wrote: > Hi Eric, > > Are you still working in this patch set? Sorry to lag on this, I've been taken by a series of other projects. I did not yet reworked it yet but I was planning to do a bit on it this week. > > Now I know why maps section is not a simple array > from a patch set from Joe Stringer: > > https://www.mail-archive.com/netdev@vger.kernel.org/msg135088.html > > So I think this patch is really useful. > > Are you going to resend the whole patch set? If not, let me collect > this patch 7/8 into my local code base and send to Arnaldo > with my other patches. If ok with you, I propose that you collect patch 7/8 it you have no news from me on Friday. If an issue for you, just collect it now and I will synchronize with updated code when resending my patchset. BR, -- Eric Leblond Blog: https://home.regit.org/
[PATCH 6/8] tools lib bpf: improve warning
Signed-off-by: Eric Leblond <e...@regit.org>
---
tools/lib/bpf/libbpf.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 7cd341e..1fe4532 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -802,7 +802,8 @@ bpf_object__create_maps(struct bpf_object *obj)
size_t j;
int err = *pfd;
- pr_warning("failed to create map: %s\n",
+ pr_warning("failed to create map (name: '%s'): %s\n",
+ obj->maps[i].name,
strerror(errno));
for (j = 0; j < i; j++)
zclose(obj->maps[j].fd);
--
2.9.3
[PATCH 4/8] tools lib bpf: export function to set type
Current API was not allowing the user to set a type like socket
filter. To avoid a setter function for each type, the patch simply
exports a set function that takes the type in parameter.
Signed-off-by: Eric Leblond <e...@regit.org>
---
tools/lib/bpf/libbpf.c | 19 +--
tools/lib/bpf/libbpf.h | 3 +++
2 files changed, 12 insertions(+), 10 deletions(-)
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 90932f1..7cd341e 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -1336,26 +1336,25 @@ int bpf_program__nth_fd(struct bpf_program *prog, int n)
return fd;
}
-static void bpf_program__set_type(struct bpf_program *prog,
- enum bpf_prog_type type)
+int bpf_program__set_type(struct bpf_program *prog, unsigned int type)
{
+ if (!prog)
+ return -EINVAL;
+ if (type >= __MAX_BPF_PROG_TYPE)
+ return -EINVAL;
+
prog->type = type;
+ return 0;
}
int bpf_program__set_tracepoint(struct bpf_program *prog)
{
- if (!prog)
- return -EINVAL;
- bpf_program__set_type(prog, BPF_PROG_TYPE_TRACEPOINT);
- return 0;
+ return bpf_program__set_type(prog, BPF_PROG_TYPE_TRACEPOINT);
}
int bpf_program__set_kprobe(struct bpf_program *prog)
{
- if (!prog)
- return -EINVAL;
- bpf_program__set_type(prog, BPF_PROG_TYPE_KPROBE);
- return 0;
+ return bpf_program__set_type(prog, BPF_PROG_TYPE_KPROBE);
}
static bool bpf_program__is_type(struct bpf_program *prog,
diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h
index e40c8d3..a18783b 100644
--- a/tools/lib/bpf/libbpf.h
+++ b/tools/lib/bpf/libbpf.h
@@ -173,6 +173,9 @@ int bpf_program__set_kprobe(struct bpf_program *prog);
bool bpf_program__is_tracepoint(struct bpf_program *prog);
bool bpf_program__is_kprobe(struct bpf_program *prog);
+int bpf_program__set_type(struct bpf_program *prog,
+ unsigned int type);
+
/*
* We don't need __attribute__((packed)) now since it is
* unnecessary for 'bpf_map_def' because they are all aligned.
--
2.9.3
[PATCH 6/8] tools lib bpf: improve warning
Signed-off-by: Eric Leblond
---
tools/lib/bpf/libbpf.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 7cd341e..1fe4532 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -802,7 +802,8 @@ bpf_object__create_maps(struct bpf_object *obj)
size_t j;
int err = *pfd;
- pr_warning("failed to create map: %s\n",
+ pr_warning("failed to create map (name: '%s'): %s\n",
+ obj->maps[i].name,
strerror(errno));
for (j = 0; j < i; j++)
zclose(obj->maps[j].fd);
--
2.9.3
[PATCH 4/8] tools lib bpf: export function to set type
Current API was not allowing the user to set a type like socket
filter. To avoid a setter function for each type, the patch simply
exports a set function that takes the type in parameter.
Signed-off-by: Eric Leblond
---
tools/lib/bpf/libbpf.c | 19 +--
tools/lib/bpf/libbpf.h | 3 +++
2 files changed, 12 insertions(+), 10 deletions(-)
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 90932f1..7cd341e 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -1336,26 +1336,25 @@ int bpf_program__nth_fd(struct bpf_program *prog, int n)
return fd;
}
-static void bpf_program__set_type(struct bpf_program *prog,
- enum bpf_prog_type type)
+int bpf_program__set_type(struct bpf_program *prog, unsigned int type)
{
+ if (!prog)
+ return -EINVAL;
+ if (type >= __MAX_BPF_PROG_TYPE)
+ return -EINVAL;
+
prog->type = type;
+ return 0;
}
int bpf_program__set_tracepoint(struct bpf_program *prog)
{
- if (!prog)
- return -EINVAL;
- bpf_program__set_type(prog, BPF_PROG_TYPE_TRACEPOINT);
- return 0;
+ return bpf_program__set_type(prog, BPF_PROG_TYPE_TRACEPOINT);
}
int bpf_program__set_kprobe(struct bpf_program *prog)
{
- if (!prog)
- return -EINVAL;
- bpf_program__set_type(prog, BPF_PROG_TYPE_KPROBE);
- return 0;
+ return bpf_program__set_type(prog, BPF_PROG_TYPE_KPROBE);
}
static bool bpf_program__is_type(struct bpf_program *prog,
diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h
index e40c8d3..a18783b 100644
--- a/tools/lib/bpf/libbpf.h
+++ b/tools/lib/bpf/libbpf.h
@@ -173,6 +173,9 @@ int bpf_program__set_kprobe(struct bpf_program *prog);
bool bpf_program__is_tracepoint(struct bpf_program *prog);
bool bpf_program__is_kprobe(struct bpf_program *prog);
+int bpf_program__set_type(struct bpf_program *prog,
+ unsigned int type);
+
/*
* We don't need __attribute__((packed)) now since it is
* unnecessary for 'bpf_map_def' because they are all aligned.
--
2.9.3
[PATCH 1/8] tools lib bpf: add error functions
The include of err.h is not explicitely needed in exported
functions and it was causing include conflict with some existing
code due to redefining some macros.
To fix this, let's have error handling functions provided by the
library. Furthermore this will allow user to have an homogeneous
API.
Signed-off-by: Eric Leblond <e...@regit.org>
---
tools/lib/bpf/libbpf.c | 11 +++
tools/lib/bpf/libbpf.h | 4 +++-
2 files changed, 14 insertions(+), 1 deletion(-)
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index b699aea..90932f1 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -31,6 +31,7 @@
#include
#include
#include
+#include
#include
#include
@@ -1447,3 +1448,13 @@ bpf_object__find_map_by_name(struct bpf_object *obj,
const char *name)
}
return NULL;
}
+
+bool bpf__is_error(const void *ptr)
+{
+ return IS_ERR(ptr);
+}
+
+long bpf__get_error(const void *ptr)
+{
+ return PTR_ERR(ptr);
+}
diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h
index dd7a513..e40c8d3 100644
--- a/tools/lib/bpf/libbpf.h
+++ b/tools/lib/bpf/libbpf.h
@@ -23,7 +23,6 @@
#include
#include
-#include
enum libbpf_errno {
__LIBBPF_ERRNO__START = 4000,
@@ -211,4 +210,7 @@ int bpf_map__set_priv(struct bpf_map *map, void *priv,
bpf_map_clear_priv_t clear_priv);
void *bpf_map__priv(struct bpf_map *map);
+bool bpf__is_error(const void *ptr);
+long bpf__get_error(const void *ptr);
+
#endif
--
2.9.3
[PATCH 0/8] tools lib bpf: fixes and functional upgrade
Hello, Here's a patchset on the libbpf library that can be found in tools/lib/bpf. Patch 0 to patch 4 add a new function to be able to set the BPF program type. Till then program type such as network filter can't be loaded by the library: * tools lib bpf: add error functions * uapi linux bpf: add max value to enum * tools: Sync tools/include/uapi/linux/bpf.h with the * tools lib bpf: export function to set type Patch 5 is adding functions that were missing to handle maps in userspace. * tools lib bpf: add missing functions Patch 7 fixes a bug in the parsing of BPF ELF file. * tools lib bpf: fix maps resolution Patch 8 update 'make install' to install the header on the system. * tools lib bpf: install header file Patchset statistics: include/uapi/linux/bpf.h | 1 + tools/include/uapi/linux/bpf.h | 56 ++-- tools/lib/bpf/Makefile | 11 +-- tools/lib/bpf/bpf.c| 35 ++- tools/lib/bpf/bpf.h| 2 -- tools/lib/bpf/libbpf.c | 83 +-- tools/lib/bpf/libbpf.h | 12 +++- 7 files changed, 166 insertions(+), 34 deletions(-) Best regards, -- Eric Leblond
