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| author | Sowmini Varadhan <sowmini.varadhan@oracle.com> | 2017-03-31 15:56:30 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-04-02 19:41:00 -0700 |
| commit | e97656d03ca0cea888a0b9d382abce8233771f31 (patch) | |
| tree | 4717f3e414f1d9a36a205d0a306888be19c1cc29 /net/rds/connection.c | |
| parent | d3fbff306c215946cdbcf9ace4d0b78e9f72b5c4 (diff) | |
| download | linux-e97656d03ca0cea888a0b9d382abce8233771f31.tar.gz | |
rds: tcp: allow progress of rds_conn_shutdown if the rds_connection is marked ERROR by an intervening FIN
rds_conn_shutdown() runs in workq context, and marks the rds_connection as DISCONNECTING before quiescing Tx/Rx paths. However, after all I/O has quiesced, we may still find the rds_connection state to be RDS_CONN_ERROR if an intervening FIN was processed in softirq context. This is not a fatal error: rds_conn_shutdown() should continue the shutdown, and there is no need to log noisy messages about this event. Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com> Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/rds/connection.c')
| -rw-r--r-- | net/rds/connection.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/net/rds/connection.c b/net/rds/connection.c index 1fa75ab7b733..6a5ebdea7d2e 100644 --- a/net/rds/connection.c +++ b/net/rds/connection.c @@ -333,11 +333,19 @@ void rds_conn_shutdown(struct rds_conn_path *cp) rds_conn_path_reset(cp); if (!rds_conn_path_transition(cp, RDS_CONN_DISCONNECTING, + RDS_CONN_DOWN) && + !rds_conn_path_transition(cp, RDS_CONN_ERROR, RDS_CONN_DOWN)) { /* This can happen - eg when we're in the middle of tearing * down the connection, and someone unloads the rds module. - * Quite reproduceable with loopback connections. + * Quite reproducible with loopback connections. * Mostly harmless. + * + * Note that this also happens with rds-tcp because + * we could have triggered rds_conn_path_drop in irq + * mode from rds_tcp_state change on the receipt of + * a FIN, thus we need to recheck for RDS_CONN_ERROR + * here. */ rds_conn_path_error(cp, "%s: failed to transition " "to state DOWN, current state " |