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authorDominik Brodowski <linux@dominikbrodowski.net>2018-03-13 21:10:06 +0300
committerDominik Brodowski <linux@dominikbrodowski.net>2018-04-02 21:15:04 +0300
commit7a09e1eb9c1e5179797e0f3341ba7315c7626a0c (patch)
treecf30e45b3699987f90971adc2dfcee8271648578 /include/linux/socket.h
parentb51d3cdf44d5ca9000de1e3d64551337d67b1cad (diff)
downloadlinux-7a09e1eb9c1e5179797e0f3341ba7315c7626a0c.tar.xz
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.h6
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 */