diff options
author | Alexei Potashnik <alexei@purestorage.com> | 2015-07-14 16:00:48 -0400 |
---|---|---|
committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2015-07-24 14:19:42 -0700 |
commit | e52a8b45b9c782937f74b701f8c656d4e5619eb5 (patch) | |
tree | 7b0a0e0824683f8ad0342b792769c436b42dcde7 | |
parent | d20ed91bb60ca54c42e3326251287ec51ed225a1 (diff) | |
download | linux-e52a8b45b9c782937f74b701f8c656d4e5619eb5.tar.bz2 |
qla2xxx: drop cmds/tmrs arrived while session is being deleted
If a new initiator (different WWN) shows up on the same fcport, old
initiator's session is scheduled for deletion. But there is a small
window between it being marked with QLA_SESS_DELETION_IN_PROGRESS
and qlt_unret_sess getting called when new session's commands will
keep finding old session in the fcport map.
This patch drops cmds/tmrs if they find session in the progress of
being deleted.
Cc: <stable@vger.kernel.org> # v3.18+
Signed-off-by: Alexei Potashnik <alexei@purestorage.com>
Acked-by: Quinn Tran <quinn.tran@qlogic.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@qlogic.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
-rw-r--r-- | drivers/scsi/qla2xxx/qla_target.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/scsi/qla2xxx/qla_target.c b/drivers/scsi/qla2xxx/qla_target.c index 0b5bd9cd7f0d..b60f9075e9f7 100644 --- a/drivers/scsi/qla2xxx/qla_target.c +++ b/drivers/scsi/qla2xxx/qla_target.c @@ -1477,6 +1477,11 @@ static void qlt_24xx_handle_abts(struct scsi_qla_host *vha, return; } + if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) { + qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false); + return; + } + rc = __qlt_24xx_handle_abts(vha, abts, sess); if (rc != 0) { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054, @@ -3768,6 +3773,16 @@ static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha, queue_work(qla_tgt_wq, &op->work); return 0; } + + /* Another WWN used to have our s_id. Our PLOGI scheduled its + * session deletion, but it's still in sess_del_work wq */ + if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) { + ql_dbg(ql_dbg_io, vha, 0x3061, + "New command while old session %p is being deleted\n", + sess); + return -EFAULT; + } + /* * Do kref_get() before returning + dropping qla_hw_data->hardware_lock. */ @@ -3931,6 +3946,9 @@ static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb) sizeof(struct atio_from_isp)); } + if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) + return -EFAULT; + return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0); } @@ -5603,6 +5621,11 @@ static void qlt_abort_work(struct qla_tgt *tgt, if (!sess) goto out_term; } else { + if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) { + sess = NULL; + goto out_term; + } + kref_get(&sess->se_sess->sess_kref); } @@ -5657,6 +5680,11 @@ static void qlt_tmr_work(struct qla_tgt *tgt, if (!sess) goto out_term; } else { + if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) { + sess = NULL; + goto out_term; + } + kref_get(&sess->se_sess->sess_kref); } |