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| author | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-03-13 22:15:04 +0300 |
|---|---|---|
| committer | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-04-02 21:15:13 +0300 |
| commit | 13a2d70e2b5218dde4b551a9b7adc5a11e359a05 (patch) | |
| tree | ffbb7d60f597a0181cd24fbb07eb998423e56446 | |
| parent | cc36dca0dffad991135d0e28938ba2b4c0b786f7 (diff) | |
| download | linux-13a2d70e2b5218dde4b551a9b7adc5a11e359a05.tar.xz | |
net: socket: add __sys_getsockopt() helper; remove in-kernel call to syscall
Using the net-internal helper __sys_getsockopt() allows us to avoid the
internal calls to the sys_getsockopt() 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>
| -rw-r--r-- | net/socket.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/net/socket.c b/net/socket.c index 5dd2e39a6cd4..a05289b1f863 100644 --- a/net/socket.c +++ b/net/socket.c @@ -1918,8 +1918,8 @@ SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname, * to pass a user mode parameter for the protocols to sort out. */ -SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, - char __user *, optval, int __user *, optlen) +static int __sys_getsockopt(int fd, int level, int optname, + char __user *optval, int __user *optlen) { int err, fput_needed; struct socket *sock; @@ -1944,6 +1944,12 @@ out_put: return err; } +SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, + char __user *, optval, int __user *, optlen) +{ + return __sys_getsockopt(fd, level, optname, optval, optlen); +} + /* * Shutdown a socket. */ @@ -2563,8 +2569,8 @@ SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args) break; case SYS_GETSOCKOPT: err = - sys_getsockopt(a0, a1, a[2], (char __user *)a[3], - (int __user *)a[4]); + __sys_getsockopt(a0, a1, a[2], (char __user *)a[3], + (int __user *)a[4]); break; case SYS_SENDMSG: err = sys_sendmsg(a0, (struct user_msghdr __user *)a1, a[2]); |