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authorVlad Yasevich <vladislav.yasevich@hp.com>2009-08-10 13:51:03 -0400
committerVlad Yasevich <vladislav.yasevich@hp.com>2009-09-04 18:20:57 -0400
commit9c5c62be2f794c7cee533d856f9f34c3cf21ff1b (patch)
treee81bcc703cedf4e667b91504b5cf9e8e01ffb6a5 /include/net
parent5d7ff261ef497c62f54c39effc259910a28b313d (diff)
sctp: Send user messages to the lower layer as one
Currenlty, sctp breaks up user messages into fragments and sends each fragment to the lower layer by itself. This means that for each fragment we go all the way down the stack and back up. This also discourages bundling of multiple fragments when they can fit into a sigle packet (ex: due to user setting a low fragmentation threashold). We introduce a new command SCTP_CMD_SND_MSG and hand the whole message down state machine. The state machine and the side-effect parser will cork the queue, add all chunks from the message to the queue, and then un-cork the queue thus causing the chunks to get transmitted. Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Diffstat (limited to 'include/net')
-rw-r--r--include/net/sctp/command.h3
-rw-r--r--include/net/sctp/structs.h1
2 files changed, 4 insertions, 0 deletions
diff --git a/include/net/sctp/command.h b/include/net/sctp/command.h
index 3b966802e05d..8be5135ff7aa 100644
--- a/include/net/sctp/command.h
+++ b/include/net/sctp/command.h
@@ -106,6 +106,7 @@ typedef enum {
SCTP_CMD_ASSOC_SHKEY, /* generate the association shared keys */
SCTP_CMD_T1_RETRAN, /* Mark for retransmission after T1 timeout */
SCTP_CMD_UPDATE_INITTAG, /* Update peer inittag */
+ SCTP_CMD_SEND_MSG, /* Send the whole use message */
SCTP_CMD_LAST
} sctp_verb_t;
@@ -139,6 +140,7 @@ typedef union {
struct sctp_ulpevent *ulpevent;
struct sctp_packet *packet;
sctp_sackhdr_t *sackh;
+ struct sctp_datamsg *msg;
} sctp_arg_t;
/* We are simulating ML type constructors here.
@@ -188,6 +190,7 @@ SCTP_ARG_CONSTRUCTOR(PEER_INIT, sctp_init_chunk_t *, init)
SCTP_ARG_CONSTRUCTOR(ULPEVENT, struct sctp_ulpevent *, ulpevent)
SCTP_ARG_CONSTRUCTOR(PACKET, struct sctp_packet *, packet)
SCTP_ARG_CONSTRUCTOR(SACKH, sctp_sackhdr_t *, sackh)
+SCTP_ARG_CONSTRUCTOR(DATAMSG, struct sctp_datamsg *, msg)
typedef struct {
sctp_arg_t obj;
diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h
index edfcacf3250e..97024faaa08f 100644
--- a/include/net/sctp/structs.h
+++ b/include/net/sctp/structs.h
@@ -643,6 +643,7 @@ struct sctp_datamsg {
struct sctp_datamsg *sctp_datamsg_from_user(struct sctp_association *,
struct sctp_sndrcvinfo *,
struct msghdr *, int len);
+void sctp_datamsg_free(struct sctp_datamsg *);
void sctp_datamsg_put(struct sctp_datamsg *);
void sctp_chunk_fail(struct sctp_chunk *, int error);
int sctp_chunk_abandoned(struct sctp_chunk *);