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authorDavid Howells <dhowells@redhat.com>2023-05-22 14:11:10 +0200
committerJakub Kicinski <kuba@kernel.org>2023-05-24 05:48:27 +0200
commitb841b901c452d92610f739a36e54978453528876 (patch)
treed83c772ba708edabc53eefbc86a1bb15b4413d7c /net/socket.c
parentnfp: add L4 RSS hashing on UDP traffic (diff)
downloadlinux-b841b901c452d92610f739a36e54978453528876.tar.xz
linux-b841b901c452d92610f739a36e54978453528876.zip
net: Declare MSG_SPLICE_PAGES internal sendmsg() flag
Declare MSG_SPLICE_PAGES, an internal sendmsg() flag, that hints to a network protocol that it should splice pages from the source iterator rather than copying the data if it can. This flag is added to a list that is cleared by sendmsg syscalls on entry. This is intended as a replacement for the ->sendpage() op, allowing a way to splice in several multipage folios in one go. Signed-off-by: David Howells <dhowells@redhat.com> Reviewed-by: Willem de Bruijn <willemb@google.com> cc: Jens Axboe <axboe@kernel.dk> cc: Matthew Wilcox <willy@infradead.org> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/socket.c')
-rw-r--r--net/socket.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/socket.c b/net/socket.c
index b7e01d0fe082..3df96e9ba4e2 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -2138,6 +2138,7 @@ int __sys_sendto(int fd, void __user *buff, size_t len, unsigned int flags,
msg.msg_name = (struct sockaddr *)&address;
msg.msg_namelen = addr_len;
}
+ flags &= ~MSG_INTERNAL_SENDMSG_FLAGS;
if (sock->file->f_flags & O_NONBLOCK)
flags |= MSG_DONTWAIT;
msg.msg_flags = flags;
@@ -2483,6 +2484,7 @@ static int ____sys_sendmsg(struct socket *sock, struct msghdr *msg_sys,
msg_sys->msg_control = ctl_buf;
msg_sys->msg_control_is_user = false;
}
+ flags &= ~MSG_INTERNAL_SENDMSG_FLAGS;
msg_sys->msg_flags = flags;
if (sock->file->f_flags & O_NONBLOCK)