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| author | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-03-13 19:47:00 +0100 |
|---|---|---|
| committer | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-04-02 20:15:10 +0200 |
| commit | b21c8f838a0e5b84c0d78fd9ed6b9f2cf97afbe9 (patch) | |
| tree | 282618debdd43999319915a79070c4e9c78fc7f5 /net/socket.c | |
| parent | 8882a107b3062c6222cdbeadb284ea054ae50a3f (diff) | |
| download | lwn-b21c8f838a0e5b84c0d78fd9ed6b9f2cf97afbe9.tar.gz lwn-b21c8f838a0e5b84c0d78fd9ed6b9f2cf97afbe9.zip | |
net: socket: add __sys_getpeername() helper; remove in-kernel call to syscall
Using the net-internal helper __sys_getpeername() allows us to avoid the
internal calls to the sys_getpeername() 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 | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/net/socket.c b/net/socket.c index b61e0d20f37b..007fb9483279 100644 --- a/net/socket.c +++ b/net/socket.c @@ -1712,8 +1712,8 @@ SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr, * name to user space. */ -SYSCALL_DEFINE3(getpeername, int, fd, struct sockaddr __user *, usockaddr, - int __user *, usockaddr_len) +int __sys_getpeername(int fd, struct sockaddr __user *usockaddr, + int __user *usockaddr_len) { struct socket *sock; struct sockaddr_storage address; @@ -1738,6 +1738,12 @@ SYSCALL_DEFINE3(getpeername, int, fd, struct sockaddr __user *, usockaddr, return err; } +SYSCALL_DEFINE3(getpeername, int, fd, struct sockaddr __user *, usockaddr, + int __user *, usockaddr_len) +{ + return __sys_getpeername(fd, usockaddr, usockaddr_len); +} + /* * Send a datagram to a given address. We move the address into kernel * space and check the user space data area is readable before invoking @@ -2511,8 +2517,8 @@ SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args) break; case SYS_GETPEERNAME: err = - sys_getpeername(a0, (struct sockaddr __user *)a1, - (int __user *)a[2]); + __sys_getpeername(a0, (struct sockaddr __user *)a1, + (int __user *)a[2]); break; case SYS_SOCKETPAIR: err = sys_socketpair(a0, a1, a[2], (int __user *)a[3]); |