* netlink.c: decode family NETLINK_KOBJECT_UEVENT if prefix is libudev
* linux/netlink_kobject_uevent.h: New struct (udev_monitor_netlink_header)
Signed-off-by: Harsha Sharma <harshasharmai...@gmail.com>
---
linux/netlink_kobject_uevent.h | 16 ++++++++++++++++
netlink.c | 27 ++++++++++++++++++++++++++-
2 files changed, 42 insertions(+), 1 deletion(-)
create mode 100644 linux/netlink_kobject_uevent.h
diff --git a/linux/netlink_kobject_uevent.h b/linux/netlink_kobject_uevent.h
new file mode 100644
index 00000000..d83ccad5
--- /dev/null
+++ b/linux/netlink_kobject_uevent.h
@@ -0,0 +1,16 @@
+#ifndef STRACE_LINUX_NETLINK_KOBJECT_UEVENT_H
+#define STRACE_LINUX_NETLINK_KOBJECT_UEVENT_H
+
+struct udev_monitor_netlink_header {
+ char prefix[8];
+ unsigned int magic;
+ unsigned int header_size;
+ unsigned int properties_off;
+ unsigned int properties_len;
+ unsigned int filter_subsystem_hash;
+ unsigned int filter_devtype_hash;
+ unsigned int filter_tag_bloom_hi;
+ unsigned int filter_tag_bloom_lo;
+};
+
+#endif /* !STRACE_LINUX_NETLINK_KOBJECT_UEVENT_H */
diff --git a/netlink.c b/netlink.c
index 6b9a1f5c..e991ed86 100644
--- a/netlink.c
+++ b/netlink.c
@@ -32,6 +32,7 @@
#include "nlattr.h"
#include <linux/audit.h>
#include <linux/rtnetlink.h>
+#include <linux/netlink_kobject_uevent.h>
#include <linux/xfrm.h>
#include "xlat/netlink_ack_flags.h"
#include "xlat/netlink_delete_flags.h"
@@ -183,6 +184,29 @@ decode_nlmsg_type_netfilter(const struct xlat *const xlat,
tprintf("%#x", msg_type);
}
+static bool
+decode_nlmsg_type_kobject_uevent(struct tcb *tcp, kernel_ulong_t addr,
+ kernel_ulong_t len,
+ const void *const opaque_data)
+{
+ struct udev_monitor_netlink_header uh;
+ const char *prefix = "libudev";
+
+ if (len < sizeof(uh))
+ return false;
+ if (!umove_or_printaddr(tcp, addr, &uh) &&
+ strcmp(uh.prefix, prefix) == 0) {
+ tprintf("{prefix=%s, magic=%u, header_size=%u,
properties_off=%u, properties_len=%u, filter_subsystem_hash=%u,
filter_devtype_hash=%u, filter_tag_bloom_hi=%u, filter_tag_bloom_lo=%u}",
uh.prefix,
+ uh.magic, uh.header_size, uh.properties_off,
+ uh.properties_len, uh.filter_subsystem_hash,
+ uh.filter_devtype_hash, uh.filter_tag_bloom_hi,
+ uh.filter_tag_bloom_lo);
+ return true;
+ }
+ return false;
+}
+
+
typedef void (*nlmsg_types_decoder_t)(const struct xlat *,
uint16_t type,
const char *dflt);
@@ -628,7 +652,8 @@ decode_netlink(struct tcb *const tcp,
const int family = get_fd_nl_family(tcp, fd);
if (family == NETLINK_KOBJECT_UEVENT) {
- printstrn(tcp, addr, len);
+ if (!decode_nlmsg_type_kobject_uevent(tcp, addr, len, NULL))
+ printstrn(tcp, addr, len);
return;
}
--
2.11.0
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