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sctp: move transport flush code out of sctp_outq_flush 

To the new sctp_outq_flush_transports.

Comment on Nagle is outdated and removed. Nagle is performed earlier, while
checking if the chunk fits the packet: if the outq length is not enough to
fill the packet, it returns SCTP_XMIT_DELAY.

So by when it gets to sctp_outq_flush_transports, it has to go through all
enlisted transports.

Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Marcelo Ricardo Leitner 2018-05-14 14:34:41 -03:00 committed by David S. Miller
parent cb93cc5d06
commit 4bf21b61f2
1 changed files with 26 additions and 30 deletions
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56
net/sctp/outqueue.c
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@ -1176,6 +1176,29 @@ static void sctp_outq_flush_data(struct sctp_outq *q,
}
}
static void sctp_outq_flush_transports(struct sctp_outq *q,
struct list_head *transport_list,
gfp_t gfp)
{
struct list_head *ltransport;
struct sctp_packet *packet;
struct sctp_transport *t;
int error = 0;
while ((ltransport = sctp_list_dequeue(transport_list)) != NULL) {
t = list_entry(ltransport, struct sctp_transport, send_ready);
packet = &t->packet;
if (!sctp_packet_empty(packet)) {
error = sctp_packet_transmit(packet, gfp);
if (error < 0)
q->asoc->base.sk->sk_err = -error;
}
/* Clear the burst limited state, if any */
sctp_transport_burst_reset(t);
}
}
/*
* Try to flush an outqueue.
*
@ -1187,17 +1210,10 @@ static void sctp_outq_flush_data(struct sctp_outq *q,
*/
static void sctp_outq_flush(struct sctp_outq *q, int rtx_timeout, gfp_t gfp)
{
struct sctp_packet *packet;
struct sctp_association *asoc = q->asoc;
/* Current transport being used. It's NOT the same as curr active one */
struct sctp_transport *transport = NULL;
int error = 0;
/* These transports have chunks to send. */
struct list_head transport_list;
struct list_head *ltransport;
INIT_LIST_HEAD(&transport_list);
packet = NULL;
LIST_HEAD(transport_list);
/*
* 6.10 Bundling
@ -1218,27 +1234,7 @@ static void sctp_outq_flush(struct sctp_outq *q, int rtx_timeout, gfp_t gfp)
sctp_flush_out:
/* Before returning, examine all the transports touched in
* this call. Right now, we bluntly force clear all the
* transports. Things might change after we implement Nagle.
* But such an examination is still required.
*
* --xguo
*/
while ((ltransport = sctp_list_dequeue(&transport_list)) != NULL) {
struct sctp_transport *t = list_entry(ltransport,
struct sctp_transport,
send_ready);
packet = &t->packet;
if (!sctp_packet_empty(packet)) {
error = sctp_packet_transmit(packet, gfp);
if (error < 0)
asoc->base.sk->sk_err = -error;
}
/* Clear the burst limited state, if any */
sctp_transport_burst_reset(t);
}
sctp_outq_flush_transports(q, &transport_list, gfp);
}
/* Update unack_data based on the incoming SACK chunk */