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| author | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-03-13 19:10:06 +0100 |
|---|---|---|
| committer | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-04-02 20:15:04 +0200 |
| commit | 7a09e1eb9c1e5179797e0f3341ba7315c7626a0c (patch) | |
| tree | cf30e45b3699987f90971adc2dfcee8271648578 /include/linux/socket.h | |
| parent | b51d3cdf44d5ca9000de1e3d64551337d67b1cad (diff) | |
| download | linux-7a09e1eb9c1e5179797e0f3341ba7315c7626a0c.tar.gz linux-7a09e1eb9c1e5179797e0f3341ba7315c7626a0c.tar.bz2 linux-7a09e1eb9c1e5179797e0f3341ba7315c7626a0c.zip | |
net: socket: add __sys_recvfrom() helper; remove in-kernel call to syscall
Using the net-internal helper __sys_recvfrom() allows us to avoid the
internal calls to the sys_recvfrom() 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 'include/linux/socket.h')
| -rw-r--r-- | include/linux/socket.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/socket.h b/include/linux/socket.h index 9286a5a8c60c..40cc93b91628 100644 --- a/include/linux/socket.h +++ b/include/linux/socket.h @@ -353,4 +353,10 @@ extern int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen unsigned int flags, struct timespec *timeout); extern int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, unsigned int flags); + +/* helpers which do the actual work for syscalls */ +extern int __sys_recvfrom(int fd, void __user *ubuf, size_t size, + unsigned int flags, struct sockaddr __user *addr, + int __user *addr_len); + #endif /* _LINUX_SOCKET_H */ |