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path: root/drivers/scsi/scsi_error.c
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Diffstat (limited to 'drivers/scsi/scsi_error.c')
-rw-r--r--drivers/scsi/scsi_error.c146
1 files changed, 133 insertions, 13 deletions
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index 83e591b60193..e8bee9f0ad0f 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -87,6 +87,18 @@ void scsi_schedule_eh(struct Scsi_Host *shost)
}
EXPORT_SYMBOL_GPL(scsi_schedule_eh);
+static int scsi_host_eh_past_deadline(struct Scsi_Host *shost)
+{
+ if (!shost->last_reset || !shost->eh_deadline)
+ return 0;
+
+ if (time_before(jiffies,
+ shost->last_reset + shost->eh_deadline))
+ return 0;
+
+ return 1;
+}
+
/**
* scsi_eh_scmd_add - add scsi cmd to error handling.
* @scmd: scmd to run eh on.
@@ -109,6 +121,9 @@ int scsi_eh_scmd_add(struct scsi_cmnd *scmd, int eh_flag)
if (scsi_host_set_state(shost, SHOST_CANCEL_RECOVERY))
goto out_unlock;
+ if (shost->eh_deadline && !shost->last_reset)
+ shost->last_reset = jiffies;
+
ret = 1;
scmd->eh_eflags |= eh_flag;
list_add_tail(&scmd->eh_entry, &shost->eh_cmd_q);
@@ -138,6 +153,9 @@ enum blk_eh_timer_return scsi_times_out(struct request *req)
trace_scsi_dispatch_cmd_timeout(scmd);
scsi_log_completion(scmd, TIMEOUT_ERROR);
+ if (host->eh_deadline && !host->last_reset)
+ host->last_reset = jiffies;
+
if (host->transportt->eh_timed_out)
rtn = host->transportt->eh_timed_out(scmd);
else if (host->hostt->eh_timed_out)
@@ -990,13 +1008,26 @@ int scsi_eh_get_sense(struct list_head *work_q,
struct list_head *done_q)
{
struct scsi_cmnd *scmd, *next;
+ struct Scsi_Host *shost;
int rtn;
+ unsigned long flags;
list_for_each_entry_safe(scmd, next, work_q, eh_entry) {
if ((scmd->eh_eflags & SCSI_EH_CANCEL_CMD) ||
SCSI_SENSE_VALID(scmd))
continue;
+ shost = scmd->device->host;
+ spin_lock_irqsave(shost->host_lock, flags);
+ if (scsi_host_eh_past_deadline(shost)) {
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ SCSI_LOG_ERROR_RECOVERY(3,
+ shost_printk(KERN_INFO, shost,
+ "skip %s, past eh deadline\n",
+ __func__));
+ break;
+ }
+ spin_unlock_irqrestore(shost->host_lock, flags);
SCSI_LOG_ERROR_RECOVERY(2, scmd_printk(KERN_INFO, scmd,
"%s: requesting sense\n",
current->comm));
@@ -1082,11 +1113,28 @@ static int scsi_eh_test_devices(struct list_head *cmd_list,
struct scsi_cmnd *scmd, *next;
struct scsi_device *sdev;
int finish_cmds;
+ unsigned long flags;
while (!list_empty(cmd_list)) {
scmd = list_entry(cmd_list->next, struct scsi_cmnd, eh_entry);
sdev = scmd->device;
+ if (!try_stu) {
+ spin_lock_irqsave(sdev->host->host_lock, flags);
+ if (scsi_host_eh_past_deadline(sdev->host)) {
+ /* Push items back onto work_q */
+ list_splice_init(cmd_list, work_q);
+ spin_unlock_irqrestore(sdev->host->host_lock,
+ flags);
+ SCSI_LOG_ERROR_RECOVERY(3,
+ shost_printk(KERN_INFO, sdev->host,
+ "skip %s, past eh deadline",
+ __func__));
+ break;
+ }
+ spin_unlock_irqrestore(sdev->host->host_lock, flags);
+ }
+
finish_cmds = !scsi_device_online(scmd->device) ||
(try_stu && !scsi_eh_try_stu(scmd) &&
!scsi_eh_tur(scmd)) ||
@@ -1122,26 +1170,42 @@ static int scsi_eh_abort_cmds(struct list_head *work_q,
struct scsi_cmnd *scmd, *next;
LIST_HEAD(check_list);
int rtn;
+ struct Scsi_Host *shost;
+ unsigned long flags;
list_for_each_entry_safe(scmd, next, work_q, eh_entry) {
if (!(scmd->eh_eflags & SCSI_EH_CANCEL_CMD))
continue;
+ shost = scmd->device->host;
+ spin_lock_irqsave(shost->host_lock, flags);
+ if (scsi_host_eh_past_deadline(shost)) {
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ list_splice_init(&check_list, work_q);
+ SCSI_LOG_ERROR_RECOVERY(3,
+ shost_printk(KERN_INFO, shost,
+ "skip %s, past eh deadline\n",
+ __func__));
+ return list_empty(work_q);
+ }
+ spin_unlock_irqrestore(shost->host_lock, flags);
SCSI_LOG_ERROR_RECOVERY(3, printk("%s: aborting cmd:"
"0x%p\n", current->comm,
scmd));
- rtn = scsi_try_to_abort_cmd(scmd->device->host->hostt, scmd);
- if (rtn == SUCCESS || rtn == FAST_IO_FAIL) {
- scmd->eh_eflags &= ~SCSI_EH_CANCEL_CMD;
- if (rtn == FAST_IO_FAIL)
- scsi_eh_finish_cmd(scmd, done_q);
- else
- list_move_tail(&scmd->eh_entry, &check_list);
- } else
+ rtn = scsi_try_to_abort_cmd(shost->hostt, scmd);
+ if (rtn == FAILED) {
SCSI_LOG_ERROR_RECOVERY(3, printk("%s: aborting"
" cmd failed:"
"0x%p\n",
current->comm,
scmd));
+ list_splice_init(&check_list, work_q);
+ return list_empty(work_q);
+ }
+ scmd->eh_eflags &= ~SCSI_EH_CANCEL_CMD;
+ if (rtn == FAST_IO_FAIL)
+ scsi_eh_finish_cmd(scmd, done_q);
+ else
+ list_move_tail(&scmd->eh_entry, &check_list);
}
return scsi_eh_test_devices(&check_list, work_q, done_q, 0);
@@ -1187,8 +1251,19 @@ static int scsi_eh_stu(struct Scsi_Host *shost,
{
struct scsi_cmnd *scmd, *stu_scmd, *next;
struct scsi_device *sdev;
+ unsigned long flags;
shost_for_each_device(sdev, shost) {
+ spin_lock_irqsave(shost->host_lock, flags);
+ if (scsi_host_eh_past_deadline(shost)) {
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ SCSI_LOG_ERROR_RECOVERY(3,
+ shost_printk(KERN_INFO, shost,
+ "skip %s, past eh deadline\n",
+ __func__));
+ break;
+ }
+ spin_unlock_irqrestore(shost->host_lock, flags);
stu_scmd = NULL;
list_for_each_entry(scmd, work_q, eh_entry)
if (scmd->device == sdev && SCSI_SENSE_VALID(scmd) &&
@@ -1241,9 +1316,20 @@ static int scsi_eh_bus_device_reset(struct Scsi_Host *shost,
{
struct scsi_cmnd *scmd, *bdr_scmd, *next;
struct scsi_device *sdev;
+ unsigned long flags;
int rtn;
shost_for_each_device(sdev, shost) {
+ spin_lock_irqsave(shost->host_lock, flags);
+ if (scsi_host_eh_past_deadline(shost)) {
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ SCSI_LOG_ERROR_RECOVERY(3,
+ shost_printk(KERN_INFO, shost,
+ "skip %s, past eh deadline\n",
+ __func__));
+ break;
+ }
+ spin_unlock_irqrestore(shost->host_lock, flags);
bdr_scmd = NULL;
list_for_each_entry(scmd, work_q, eh_entry)
if (scmd->device == sdev) {
@@ -1303,6 +1389,21 @@ static int scsi_eh_target_reset(struct Scsi_Host *shost,
struct scsi_cmnd *next, *scmd;
int rtn;
unsigned int id;
+ unsigned long flags;
+
+ spin_lock_irqsave(shost->host_lock, flags);
+ if (scsi_host_eh_past_deadline(shost)) {
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ /* push back on work queue for further processing */
+ list_splice_init(&check_list, work_q);
+ list_splice_init(&tmp_list, work_q);
+ SCSI_LOG_ERROR_RECOVERY(3,
+ shost_printk(KERN_INFO, shost,
+ "skip %s, past eh deadline\n",
+ __func__));
+ return list_empty(work_q);
+ }
+ spin_unlock_irqrestore(shost->host_lock, flags);
scmd = list_entry(tmp_list.next, struct scsi_cmnd, eh_entry);
id = scmd_id(scmd);
@@ -1347,6 +1448,7 @@ static int scsi_eh_bus_reset(struct Scsi_Host *shost,
LIST_HEAD(check_list);
unsigned int channel;
int rtn;
+ unsigned long flags;
/*
* we really want to loop over the various channels, and do this on
@@ -1356,6 +1458,18 @@ static int scsi_eh_bus_reset(struct Scsi_Host *shost,
*/
for (channel = 0; channel <= shost->max_channel; channel++) {
+ spin_lock_irqsave(shost->host_lock, flags);
+ if (scsi_host_eh_past_deadline(shost)) {
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ list_splice_init(&check_list, work_q);
+ SCSI_LOG_ERROR_RECOVERY(3,
+ shost_printk(KERN_INFO, shost,
+ "skip %s, past eh deadline\n",
+ __func__));
+ return list_empty(work_q);
+ }
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
chan_scmd = NULL;
list_for_each_entry(scmd, work_q, eh_entry) {
if (channel == scmd_channel(scmd)) {
@@ -1755,8 +1869,9 @@ static void scsi_restart_operations(struct Scsi_Host *shost)
* will be requests for character device operations, and also for
* ioctls to queued block devices.
*/
- SCSI_LOG_ERROR_RECOVERY(3, printk("%s: waking up host to restart\n",
- __func__));
+ SCSI_LOG_ERROR_RECOVERY(3,
+ printk("scsi_eh_%d waking up host to restart\n",
+ shost->host_no));
spin_lock_irqsave(shost->host_lock, flags);
if (scsi_host_set_state(shost, SHOST_RUNNING))
@@ -1883,6 +1998,10 @@ static void scsi_unjam_host(struct Scsi_Host *shost)
if (!scsi_eh_abort_cmds(&eh_work_q, &eh_done_q))
scsi_eh_ready_devs(shost, &eh_work_q, &eh_done_q);
+ spin_lock_irqsave(shost->host_lock, flags);
+ if (shost->eh_deadline)
+ shost->last_reset = 0;
+ spin_unlock_irqrestore(shost->host_lock, flags);
scsi_eh_flush_done_q(&eh_done_q);
}
@@ -1909,7 +2028,7 @@ int scsi_error_handler(void *data)
if ((shost->host_failed == 0 && shost->host_eh_scheduled == 0) ||
shost->host_failed != shost->host_busy) {
SCSI_LOG_ERROR_RECOVERY(1,
- printk("Error handler scsi_eh_%d sleeping\n",
+ printk("scsi_eh_%d: sleeping\n",
shost->host_no));
schedule();
continue;
@@ -1917,8 +2036,9 @@ int scsi_error_handler(void *data)
__set_current_state(TASK_RUNNING);
SCSI_LOG_ERROR_RECOVERY(1,
- printk("Error handler scsi_eh_%d waking up\n",
- shost->host_no));
+ printk("scsi_eh_%d: waking up %d/%d/%d\n",
+ shost->host_no, shost->host_eh_scheduled,
+ shost->host_failed, shost->host_busy));
/*
* We have a host that is failing for some reason. Figure out
generated by cgit v1.2.3 (git 2.0.4) at 2024-05-26 05:49:44 +0000