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authorXin Long <lucien.xin@gmail.com>2019-11-08 13:20:33 +0800
committerDavid S. Miller <davem@davemloft.net>2019-11-08 14:18:32 -0800
commit768e15182dcb809e39c338290dda10c4e271d133 (patch)
treeca36a9737a3d123e47cfec4fba0136f2b305fd98 /net/sctp/associola.c
parentsctp: add pf_expose per netns and sock and asoc (diff)
downloadlinux-dev-768e15182dcb809e39c338290dda10c4e271d133.tar.xz
linux-dev-768e15182dcb809e39c338290dda10c4e271d133.zip
sctp: add SCTP_ADDR_POTENTIALLY_FAILED notification
SCTP Quick failover draft section 5.1, point 5 has been removed from rfc7829. Instead, "the sender SHOULD (i) notify the Upper Layer Protocol (ULP) about this state transition", as said in section 3.2, point 8. So this patch is to add SCTP_ADDR_POTENTIALLY_FAILED, defined in section 7.1, "which is reported if the affected address becomes PF". Also remove transport cwnd's update when moving from PF back to ACTIVE , which is no longer in rfc7829 either. Note that ulp_notify will be set to false if asoc->expose is not 'enabled', according to last patch. v2->v3: - define SCTP_ADDR_PF SCTP_ADDR_POTENTIALLY_FAILED. v3->v4: - initialize spc_state with SCTP_ADDR_AVAILABLE, as Marcelo suggested. - check asoc->pf_expose in sctp_assoc_control_transport(), as Marcelo suggested. Signed-off-by: Xin Long <lucien.xin@gmail.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
-rw-r--r--net/sctp/associola.c32
1 files changed, 14 insertions, 18 deletions
diff --git a/net/sctp/associola.c b/net/sctp/associola.c
index 3bf3380a5521..ad7a74e942d3 100644
--- a/net/sctp/associola.c
+++ b/net/sctp/associola.c
@@ -787,8 +787,8 @@ void sctp_assoc_control_transport(struct sctp_association *asoc,
enum sctp_transport_cmd command,
sctp_sn_error_t error)
{
+ int spc_state = SCTP_ADDR_AVAILABLE;
bool ulp_notify = true;
- int spc_state = 0;
/* Record the transition on the transport. */
switch (command) {
@@ -797,19 +797,13 @@ void sctp_assoc_control_transport(struct sctp_association *asoc,
* to heartbeat success, report the SCTP_ADDR_CONFIRMED
* state to the user, otherwise report SCTP_ADDR_AVAILABLE.
*/
- if (SCTP_UNCONFIRMED == transport->state &&
- SCTP_HEARTBEAT_SUCCESS == error)
- spc_state = SCTP_ADDR_CONFIRMED;
- else
- spc_state = SCTP_ADDR_AVAILABLE;
- /* Don't inform ULP about transition from PF to
- * active state and set cwnd to 1 MTU, see SCTP
- * Quick failover draft section 5.1, point 5
- */
- if (transport->state == SCTP_PF) {
+ if (transport->state == SCTP_PF &&
+ asoc->pf_expose != SCTP_PF_EXPOSE_ENABLE)
ulp_notify = false;
- transport->cwnd = asoc->pathmtu;
- }
+ else if (transport->state == SCTP_UNCONFIRMED &&
+ error == SCTP_HEARTBEAT_SUCCESS)
+ spc_state = SCTP_ADDR_CONFIRMED;
+
transport->state = SCTP_ACTIVE;
break;
@@ -818,19 +812,21 @@ void sctp_assoc_control_transport(struct sctp_association *asoc,
* to inactive state. Also, release the cached route since
* there may be a better route next time.
*/
- if (transport->state != SCTP_UNCONFIRMED)
+ if (transport->state != SCTP_UNCONFIRMED) {
transport->state = SCTP_INACTIVE;
- else {
+ spc_state = SCTP_ADDR_UNREACHABLE;
+ } else {
sctp_transport_dst_release(transport);
ulp_notify = false;
}
-
- spc_state = SCTP_ADDR_UNREACHABLE;
break;
case SCTP_TRANSPORT_PF:
transport->state = SCTP_PF;
- ulp_notify = false;
+ if (asoc->pf_expose != SCTP_PF_EXPOSE_ENABLE)
+ ulp_notify = false;
+ else
+ spc_state = SCTP_ADDR_POTENTIALLY_FAILED;
break;
default: