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| author | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-03-13 19:24:23 +0100 |
|---|---|---|
| committer | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-04-02 20:15:06 +0200 |
| commit | 4541e80560ca56d63348f40f2e34b044a5eb3dd7 (patch) | |
| tree | f22f3698d50d5f058dc60f5a782131440e88ca12 /net/socket.c | |
| parent | 211b634b7f1ebc3436d5e8a34810a8eaa1f269d9 (diff) | |
| download | lwn-4541e80560ca56d63348f40f2e34b044a5eb3dd7.tar.gz lwn-4541e80560ca56d63348f40f2e34b044a5eb3dd7.zip | |
net: socket: add __sys_accept4() helper; remove in-kernel call to syscall
Using the net-internal helper __sys_accept4() allows us to avoid the
internal calls to the sys_accept4() 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/socket.c')
| -rw-r--r-- | net/socket.c | 20 |
1 files changed, 13 insertions, 7 deletions
diff --git a/net/socket.c b/net/socket.c index 3f037a21ba5e..45f6ea0d57a5 100644 --- a/net/socket.c +++ b/net/socket.c @@ -1519,8 +1519,8 @@ SYSCALL_DEFINE2(listen, int, fd, int, backlog) * clean when we restucture accept also. */ -SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr, - int __user *, upeer_addrlen, int, flags) +int __sys_accept4(int fd, struct sockaddr __user *upeer_sockaddr, + int __user *upeer_addrlen, int flags) { struct socket *sock, *newsock; struct file *newfile; @@ -1599,10 +1599,16 @@ out_fd: goto out_put; } +SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr, + int __user *, upeer_addrlen, int, flags) +{ + return __sys_accept4(fd, upeer_sockaddr, upeer_addrlen, flags); +} + SYSCALL_DEFINE3(accept, int, fd, struct sockaddr __user *, upeer_sockaddr, int __user *, upeer_addrlen) { - return sys_accept4(fd, upeer_sockaddr, upeer_addrlen, 0); + return __sys_accept4(fd, upeer_sockaddr, upeer_addrlen, 0); } /* @@ -2469,8 +2475,8 @@ SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args) err = sys_listen(a0, a1); break; case SYS_ACCEPT: - err = sys_accept4(a0, (struct sockaddr __user *)a1, - (int __user *)a[2], 0); + err = __sys_accept4(a0, (struct sockaddr __user *)a1, + (int __user *)a[2], 0); break; case SYS_GETSOCKNAME: err = @@ -2525,8 +2531,8 @@ SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args) (struct timespec __user *)a[4]); break; case SYS_ACCEPT4: - err = sys_accept4(a0, (struct sockaddr __user *)a1, - (int __user *)a[2], a[3]); + err = __sys_accept4(a0, (struct sockaddr __user *)a1, + (int __user *)a[2], a[3]); break; default: err = -EINVAL; |