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sock: break up sock_cmsg_snd into __sock_cmsg_snd and loop

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To process cmsg's of the SOL_SOCKET level in addition to
cmsgs of another level, protocols can call sock_cmsg_send().
This causes a double walk on the cmsghdr list, one for SOL_SOCKET
and one for the other level.

Extract the inner demultiplex logic from the loop that walks the list,
to allow having this called directly from a walker in the protocol
specific code.

Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Soheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Willem de Bruijn
2016-04-02 23:08:06 -04:00
committed by David S. Miller
parent 833716e0ed
commit 39771b127b
2 changed files with 24 additions and 11 deletions
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2
include/net/sock.h
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@@ -1420,6 +1420,8 @@ struct sockcm_cookie {
u32 mark;
};
int __sock_cmsg_send(struct sock *sk, struct msghdr *msg, struct cmsghdr *cmsg,
struct sockcm_cookie *sockc);
int sock_cmsg_send(struct sock *sk, struct msghdr *msg,
struct sockcm_cookie *sockc);