[PATCH -next 18/22] net: socket: add __compat_sys_recvfrom() helper; remove in-kernel call to compat syscall

[Dominik Brodowski]

Using the net-internal helper __compat_sys_recvfrom() allows us to avoid
the internal calls to the compat_sys_recvfrom() syscall.

Cc: David S. Miller 
Cc: net...@vger.kernel.org
Signed-off-by: Dominik Brodowski 
---
 net/compat.c | 23 ---
 1 file changed, 16 insertions(+), 7 deletions(-)

diff --git a/net/compat.c b/net/compat.c
index 9e0d030063ad..513adc8d0e0f 100644
--- a/net/compat.c
+++ b/net/compat.c
@@ -753,18 +753,25 @@ COMPAT_SYSCALL_DEFINE3(recvmsg, int, fd, struct 
compat_msghdr __user *, msg, uns
 flags | MSG_CMSG_COMPAT, false);
 }
 
+static inline long __compat_sys_recvfrom(int fd, void __user *buf,
+compat_size_t len, unsigned int flags,
+struct sockaddr __user *addr,
+int __user *addrlen)
+{
+   return __sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, addr,
+ addrlen);
+}
+
 COMPAT_SYSCALL_DEFINE4(recv, int, fd, void __user *, buf, compat_size_t, len, 
unsigned int, flags)
 {
-   return __sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, NULL,
- NULL);
+   return __compat_sys_recvfrom(fd, buf, len, flags, NULL, NULL);
 }
 
 COMPAT_SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, buf, compat_size_t, 
len,
   unsigned int, flags, struct sockaddr __user *, addr,
   int __user *, addrlen)
 {
-   return __sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, addr,
- addrlen);
+   return __compat_sys_recvfrom(fd, buf, len, flags, addr, addrlen);
 }
 
 COMPAT_SYSCALL_DEFINE5(recvmmsg, int, fd, struct compat_mmsghdr __user *, mmsg,
@@ -845,11 +852,13 @@ COMPAT_SYSCALL_DEFINE2(socketcall, int, call, u32 __user 
*, args)
   compat_ptr(a[4]), a[5]);
break;
case SYS_RECV:
-   ret = compat_sys_recv(a0, compat_ptr(a1), a[2], a[3]);
+   ret = __compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3],
+   NULL, NULL);
break;
case SYS_RECVFROM:
-   ret = compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3],
- compat_ptr(a[4]), compat_ptr(a[5]));
+   ret = __compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3],
+   compat_ptr(a[4]),
+   compat_ptr(a[5]));
break;
case SYS_SHUTDOWN:
ret = __sys_shutdown(a0, a1);
-- 
2.16.2

[PATCH -next 18/22] net: socket: add __compat_sys_recvfrom() helper; remove in-kernel call to compat syscall

[Dominik Brodowski]

Using the net-internal helper __compat_sys_recvfrom() allows us to avoid
the internal calls to the compat_sys_recvfrom() syscall.

Cc: David S. Miller 
Cc: net...@vger.kernel.org
Signed-off-by: Dominik Brodowski 
---
 net/compat.c | 23 ---
 1 file changed, 16 insertions(+), 7 deletions(-)

diff --git a/net/compat.c b/net/compat.c
index 9e0d030063ad..513adc8d0e0f 100644
--- a/net/compat.c
+++ b/net/compat.c
@@ -753,18 +753,25 @@ COMPAT_SYSCALL_DEFINE3(recvmsg, int, fd, struct 
compat_msghdr __user *, msg, uns
 flags | MSG_CMSG_COMPAT, false);
 }
 
+static inline long __compat_sys_recvfrom(int fd, void __user *buf,
+compat_size_t len, unsigned int flags,
+struct sockaddr __user *addr,
+int __user *addrlen)
+{
+   return __sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, addr,
+ addrlen);
+}
+
 COMPAT_SYSCALL_DEFINE4(recv, int, fd, void __user *, buf, compat_size_t, len, 
unsigned int, flags)
 {
-   return __sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, NULL,
- NULL);
+   return __compat_sys_recvfrom(fd, buf, len, flags, NULL, NULL);
 }
 
 COMPAT_SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, buf, compat_size_t, 
len,
   unsigned int, flags, struct sockaddr __user *, addr,
   int __user *, addrlen)
 {
-   return __sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, addr,
- addrlen);
+   return __compat_sys_recvfrom(fd, buf, len, flags, addr, addrlen);
 }
 
 COMPAT_SYSCALL_DEFINE5(recvmmsg, int, fd, struct compat_mmsghdr __user *, mmsg,
@@ -845,11 +852,13 @@ COMPAT_SYSCALL_DEFINE2(socketcall, int, call, u32 __user 
*, args)
   compat_ptr(a[4]), a[5]);
break;
case SYS_RECV:
-   ret = compat_sys_recv(a0, compat_ptr(a1), a[2], a[3]);
+   ret = __compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3],
+   NULL, NULL);
break;
case SYS_RECVFROM:
-   ret = compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3],
- compat_ptr(a[4]), compat_ptr(a[5]));
+   ret = __compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3],
+   compat_ptr(a[4]),
+   compat_ptr(a[5]));
break;
case SYS_SHUTDOWN:
ret = __sys_shutdown(a0, a1);
-- 
2.16.2