diff options
| author | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-03-16 19:01:41 +0300 |
|---|---|---|
| committer | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-04-02 21:15:19 +0300 |
| commit | 8770cf4a5858c4f7c109a3e47dfd3715fda45f2c (patch) | |
| tree | a259a3ad0db09900e7a49c2dba777cdff1b31f8a /net | |
| parent | 73ee3eafd5d1037af9762d28d17611bcf64834d6 (diff) | |
| download | linux-8770cf4a5858c4f7c109a3e47dfd3715fda45f2c.tar.xz | |
net: socket: add __compat_sys_getsockopt() helper; remove in-kernel call to compat syscall
Using the net-internal helper __compat_sys_getsockopt() allows us to avoid
the internal calls to the compat_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>
Diffstat (limited to 'net')
| -rw-r--r-- | net/compat.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/net/compat.c b/net/compat.c index 75bfcbbb2e3e..cdf5b0c1b962 100644 --- a/net/compat.c +++ b/net/compat.c @@ -509,8 +509,9 @@ int compat_sock_get_timestampns(struct sock *sk, struct timespec __user *usersta } EXPORT_SYMBOL(compat_sock_get_timestampns); -COMPAT_SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, - char __user *, optval, int __user *, optlen) +static int __compat_sys_getsockopt(int fd, int level, int optname, + char __user *optval, + int __user *optlen) { int err; struct socket *sock = sockfd_lookup(fd, &err); @@ -536,6 +537,12 @@ COMPAT_SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, return err; } +COMPAT_SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, + char __user *, optval, int __user *, optlen) +{ + return __compat_sys_getsockopt(fd, level, optname, optval, optlen); +} + struct compat_group_req { __u32 gr_interface; struct __kernel_sockaddr_storage gr_group @@ -874,8 +881,9 @@ COMPAT_SYSCALL_DEFINE2(socketcall, int, call, u32 __user *, args) compat_ptr(a[3]), a[4]); break; case SYS_GETSOCKOPT: - ret = compat_sys_getsockopt(a0, a1, a[2], - compat_ptr(a[3]), compat_ptr(a[4])); + ret = __compat_sys_getsockopt(a0, a1, a[2], + compat_ptr(a[3]), + compat_ptr(a[4])); break; case SYS_SENDMSG: ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]); |