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| author | Bart Van Assche <bart.vanassche@wdc.com> | 2018-06-22 14:53:06 -0700 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2018-07-02 16:44:32 -0400 |
| commit | 325c1e8b248ed12a685d0a904b774abef3821e8e (patch) | |
| tree | 2e48ac86ad05aed2187b57695fc899f2942c9226 /drivers/target/target_core_ua.c | |
| parent | 17e391dd09f5b257365367ce812a4332dc2c9653 (diff) | |
| download | linux-325c1e8b248ed12a685d0a904b774abef3821e8e.tar.gz | |
scsi: target: Fix handling of removed LUNs
Send a valid ASC / ASCQ combination back to the initiator if a SCSI command
is received after a LUN has been removed. This patch fixes the following
call trace:
WARNING: CPU: 0 PID: 4 at drivers/target/target_core_transport.c:3131 translate_sense_reason+0x164/0x190 [target_core_mod]
Workqueue: ib-comp-wq ib_cq_poll_work [ib_core]
RIP: 0010:translate_sense_reason+0x164/0x190 [target_core_mod]
Call Trace:
transport_send_check_condition_and_sense+0x95/0x1c0 [target_core_mod]
transport_generic_request_failure+0x102/0x270 [target_core_mod]
transport_generic_new_cmd+0x138/0x340 [target_core_mod]
transport_handle_cdb_direct+0x2f/0x80 [target_core_mod]
target_submit_cmd_map_sgls+0x212/0x2a0 [target_core_mod]
srpt_handle_new_iu+0x244/0x680 [ib_srpt]
__ib_process_cq+0x6d/0xc0 [ib_core]
ib_cq_poll_work+0x18/0x50 [ib_core]
process_one_work+0x20b/0x6a0
worker_thread+0x35/0x380
kthread+0x117/0x130
ret_from_fork+0x24/0x30
Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Reviewed-by: Mike Christie <mchristi@redhat.com>
Cc: Mike Christie <mchristi@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/target/target_core_ua.c')
| -rw-r--r-- | drivers/target/target_core_ua.c | 31 |
1 files changed, 18 insertions, 13 deletions
diff --git a/drivers/target/target_core_ua.c b/drivers/target/target_core_ua.c index be25eb807a5f..9399b38339f9 100644 --- a/drivers/target/target_core_ua.c +++ b/drivers/target/target_core_ua.c @@ -202,10 +202,13 @@ void core_scsi3_ua_release_all( spin_unlock(&deve->ua_lock); } -void core_scsi3_ua_for_check_condition( - struct se_cmd *cmd, - u8 *asc, - u8 *ascq) +/* + * Dequeue a unit attention from the unit attention list. This function + * returns true if the dequeuing succeeded and if *@key, *@asc and *@ascq have + * been set. + */ +bool core_scsi3_ua_for_check_condition(struct se_cmd *cmd, u8 *key, u8 *asc, + u8 *ascq) { struct se_device *dev = cmd->se_dev; struct se_dev_entry *deve; @@ -214,23 +217,23 @@ void core_scsi3_ua_for_check_condition( struct se_ua *ua = NULL, *ua_p; int head = 1; - if (!sess) - return; + if (WARN_ON_ONCE(!sess)) + return false; nacl = sess->se_node_acl; - if (!nacl) - return; + if (WARN_ON_ONCE(!nacl)) + return false; rcu_read_lock(); deve = target_nacl_find_deve(nacl, cmd->orig_fe_lun); if (!deve) { rcu_read_unlock(); - return; - } - if (!atomic_read(&deve->ua_count)) { - rcu_read_unlock(); - return; + *key = ILLEGAL_REQUEST; + *asc = 0x25; /* LOGICAL UNIT NOT SUPPORTED */ + *ascq = 0; + return true; } + *key = UNIT_ATTENTION; /* * The highest priority Unit Attentions are placed at the head of the * struct se_dev_entry->ua_list, and will be returned in CHECK_CONDITION + @@ -273,6 +276,8 @@ void core_scsi3_ua_for_check_condition( (dev->dev_attrib.emulate_ua_intlck_ctrl != 0) ? "Reporting" : "Releasing", dev->dev_attrib.emulate_ua_intlck_ctrl, cmd->orig_fe_lun, cmd->t_task_cdb[0], *asc, *ascq); + + return head == 0; } int core_scsi3_ua_clear_for_request_sense( |