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authorTom Herbert <tom@herbertland.com>2016-03-07 14:11:03 -0800
committerDavid S. Miller <davem@davemloft.net>2016-03-09 16:36:13 -0500
commitf092276d85b82504e8a07498f4e9e0c51f06745c (patch)
treec1d130980b720167581a0f74a9a8bd2746e8cee2 /include/linux/socket.h
parent28a94d8fb35b3a75b802f368ae6f4a9f6b0d435a (diff)
net: Add MSG_BATCH flag
Add a new msg flag called MSG_BATCH. This flag is used in sendmsg to indicate that more messages will follow (i.e. a batch of messages is being sent). This is similar to MSG_MORE except that the following messages are not merged into one packet, they are sent individually. sendmmsg is updated so that each contained message except for the last one is marked as MSG_BATCH. MSG_BATCH is a performance optimization in cases where a socket implementation can benefit by transmitting packets in a batch. Signed-off-by: Tom Herbert <tom@herbertland.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/socket.h')
-rw-r--r--include/linux/socket.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/socket.h b/include/linux/socket.h
index 5bf59c8493b7..d834af22a460 100644
--- a/include/linux/socket.h
+++ b/include/linux/socket.h
@@ -274,6 +274,7 @@ struct ucred {
#define MSG_MORE 0x8000 /* Sender will send more */
#define MSG_WAITFORONE 0x10000 /* recvmmsg(): block until 1+ packets avail */
#define MSG_SENDPAGE_NOTLAST 0x20000 /* sendpage() internal : not the last page */
+#define MSG_BATCH 0x40000 /* sendmmsg(): more messages coming */
#define MSG_EOF MSG_FIN
#define MSG_FASTOPEN 0x20000000 /* Send data in TCP SYN */