From 4ea0c32f5f42f7ef33a7ecfb9b61ff0cad9b3c08 Mon Sep 17 00:00:00 2001 From: Xin Long Date: Sun, 19 Feb 2017 01:52:46 +0800 Subject: sctp: add support for MSG_MORE This patch is to add support for MSG_MORE on sctp. It adds force_delay in sctp_datamsg to save MSG_MORE, and sets it after creating datamsg according to the send flag. sctp_packet_can_append_data then uses it to decide if the chunks of this msg will be sent at once or delay it. Note that unlike [1], this patch saves MSG_MORE in datamsg, instead of in assoc. As sctp enqueues the chunks first, then dequeue them one by one. If it's saved in assoc,the current msg's send flag (MSG_MORE) may affect other chunks' bundling. Since last patch, sctp flush out queue once assoc state falls into SHUTDOWN_PENDING, the close block problem mentioned in [1] has been solved as well. [1] https://patchwork.ozlabs.org/patch/372404/ Signed-off-by: Xin Long Signed-off-by: David S. Miller --- include/net/sctp/structs.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/net') diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h index 387c802bf248..a244db5e5ff7 100644 --- a/include/net/sctp/structs.h +++ b/include/net/sctp/structs.h @@ -497,6 +497,7 @@ struct sctp_datamsg { /* Did the messenge fail to send? */ int send_error; u8 send_failed:1, + force_delay:1, can_delay; /* should this message be Nagle delayed */ }; -- cgit v1.2.3