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authorDominik Brodowski <linux@dominikbrodowski.net>2018-03-13 21:43:14 +0300
committerDominik Brodowski <linux@dominikbrodowski.net>2018-04-02 21:15:09 +0300
commit8882a107b3062c6222cdbeadb284ea054ae50a3f (patch)
tree6e5afbbf9cf22b58ed07ec120d8ce45034ce7538 /net
parent25e290eed9c653cc90ac675d64b30b66cffce82f (diff)
downloadlinux-8882a107b3062c6222cdbeadb284ea054ae50a3f.tar.xz
net: socket: add __sys_getsockname() helper; remove in-kernel call to syscall
Using the net-internal helper __sys_getsockname() allows us to avoid the internal calls to the sys_getsockname() syscall. This patch is part of a series which removes in-kernel calls to syscalls. On this basis, the syscall entry path can be streamlined. For details, see http://lkml.kernel.org/r/20180325162527.GA17492@light.dominikbrodowski.net Cc: David S. Miller <davem@davemloft.net> Cc: netdev@vger.kernel.org Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Diffstat (limited to 'net')
-rw-r--r--net/compat.c2
-rw-r--r--net/socket.c14
2 files changed, 11 insertions, 5 deletions
diff --git a/net/compat.c b/net/compat.c
index c80cb973f383..efd28d02608c 100644
--- a/net/compat.c
+++ b/net/compat.c
@@ -826,7 +826,7 @@ COMPAT_SYSCALL_DEFINE2(socketcall, int, call, u32 __user *, args)
ret = __sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), 0);
break;
case SYS_GETSOCKNAME:
- ret = sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2]));
+ ret = __sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2]));
break;
case SYS_GETPEERNAME:
ret = sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2]));
diff --git a/net/socket.c b/net/socket.c
index 67d9d70a4734..b61e0d20f37b 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -1675,8 +1675,8 @@ SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr,
* name to user space.
*/
-SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr,
- int __user *, usockaddr_len)
+int __sys_getsockname(int fd, struct sockaddr __user *usockaddr,
+ int __user *usockaddr_len)
{
struct socket *sock;
struct sockaddr_storage address;
@@ -1701,6 +1701,12 @@ out:
return err;
}
+SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr,
+ int __user *, usockaddr_len)
+{
+ return __sys_getsockname(fd, usockaddr, usockaddr_len);
+}
+
/*
* Get the remote address ('name') of a socket object. Move the obtained
* name to user space.
@@ -2500,8 +2506,8 @@ SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args)
break;
case SYS_GETSOCKNAME:
err =
- sys_getsockname(a0, (struct sockaddr __user *)a1,
- (int __user *)a[2]);
+ __sys_getsockname(a0, (struct sockaddr __user *)a1,
+ (int __user *)a[2]);
break;
case SYS_GETPEERNAME:
err =