#include <linux/module.h>
#include <linux/sched.h>
+#include <linux/gfp.h>
#include <linux/timer.h>
#include <linux/string.h>
#include <linux/kernel.h>
#include "scsi_logging.h"
#include "scsi_transport_api.h"
+#include <trace/events/scsi.h>
+
#define SENSE_TIMEOUT (10*HZ)
/*
void scsi_eh_wakeup(struct Scsi_Host *shost)
{
if (shost->host_busy == shost->host_failed) {
+ trace_scsi_eh_wakeup(shost);
wake_up_process(shost->ehandler);
SCSI_LOG_ERROR_RECOVERY(5,
printk("Waking error handler thread\n"));
struct scsi_cmnd *scmd = req->special;
enum blk_eh_timer_return rtn = BLK_EH_NOT_HANDLED;
+ trace_scsi_dispatch_cmd_timeout(scmd);
scsi_log_completion(scmd, TIMEOUT_ERROR);
if (scmd->device->host->transportt->eh_timed_out)
if (scmd->device->allow_restart &&
(sshdr.asc == 0x04) && (sshdr.ascq == 0x02))
return FAILED;
- return SUCCESS;
+
+ if (blk_barrier_rq(scmd->request))
+ /*
+ * barrier requests should always retry on UA
+ * otherwise block will get a spurious error
+ */
+ return NEEDS_RETRY;
+ else
+ /*
+ * for normal (non barrier) commands, pass the
+ * UA upwards for a determination in the
+ * completion functions
+ */
+ return SUCCESS;
/* these three are not supported */
case COPY_ABORTED:
}
}
+static void scsi_handle_queue_ramp_up(struct scsi_device *sdev)
+{
+ struct scsi_host_template *sht = sdev->host->hostt;
+ struct scsi_device *tmp_sdev;
+
+ if (!sht->change_queue_depth ||
+ sdev->queue_depth >= sdev->max_queue_depth)
+ return;
+
+ if (time_before(jiffies,
+ sdev->last_queue_ramp_up + sdev->queue_ramp_up_period))
+ return;
+
+ if (time_before(jiffies,
+ sdev->last_queue_full_time + sdev->queue_ramp_up_period))
+ return;
+
+ /*
+ * Walk all devices of a target and do
+ * ramp up on them.
+ */
+ shost_for_each_device(tmp_sdev, sdev->host) {
+ if (tmp_sdev->channel != sdev->channel ||
+ tmp_sdev->id != sdev->id ||
+ tmp_sdev->queue_depth == sdev->max_queue_depth)
+ continue;
+ /*
+ * call back into LLD to increase queue_depth by one
+ * with ramp up reason code.
+ */
+ sht->change_queue_depth(tmp_sdev, tmp_sdev->queue_depth + 1,
+ SCSI_QDEPTH_RAMP_UP);
+ sdev->last_queue_ramp_up = jiffies;
+ }
+}
+
static void scsi_handle_queue_full(struct scsi_device *sdev)
{
struct scsi_host_template *sht = sdev->host->hostt;
*/
switch (status_byte(scmd->result)) {
case GOOD:
+ scsi_handle_queue_ramp_up(scmd->device);
case COMMAND_TERMINATED:
return SUCCESS;
case CHECK_CONDITION:
"0x%p\n", current->comm,
scmd));
rtn = scsi_try_to_abort_cmd(scmd);
- if (rtn == SUCCESS) {
+ if (rtn == SUCCESS || rtn == FAST_IO_FAIL) {
scmd->eh_eflags &= ~SCSI_EH_CANCEL_CMD;
if (!scsi_device_online(scmd->device) ||
+ rtn == FAST_IO_FAIL ||
!scsi_eh_tur(scmd)) {
scsi_eh_finish_cmd(scmd, done_q);
}
" 0x%p\n", current->comm,
sdev));
rtn = scsi_try_bus_device_reset(bdr_scmd);
- if (rtn == SUCCESS) {
+ if (rtn == SUCCESS || rtn == FAST_IO_FAIL) {
if (!scsi_device_online(sdev) ||
+ rtn == FAST_IO_FAIL ||
!scsi_eh_tur(bdr_scmd)) {
list_for_each_entry_safe(scmd, next,
work_q, eh_entry) {
"to target %d\n",
current->comm, id));
rtn = scsi_try_target_reset(tgtr_scmd);
- if (rtn == SUCCESS) {
+ if (rtn == SUCCESS || rtn == FAST_IO_FAIL) {
list_for_each_entry_safe(scmd, next, work_q, eh_entry) {
if (id == scmd_id(scmd))
if (!scsi_device_online(scmd->device) ||
+ rtn == FAST_IO_FAIL ||
!scsi_eh_tur(tgtr_scmd))
scsi_eh_finish_cmd(scmd,
done_q);
" %d\n", current->comm,
channel));
rtn = scsi_try_bus_reset(chan_scmd);
- if (rtn == SUCCESS) {
+ if (rtn == SUCCESS || rtn == FAST_IO_FAIL) {
list_for_each_entry_safe(scmd, next, work_q, eh_entry) {
if (channel == scmd_channel(scmd))
if (!scsi_device_online(scmd->device) ||
+ rtn == FAST_IO_FAIL ||
!scsi_eh_tur(scmd))
scsi_eh_finish_cmd(scmd,
done_q);
, current->comm));
rtn = scsi_try_host_reset(scmd);
- if (rtn == SUCCESS) {
+ if (rtn == SUCCESS || rtn == FAST_IO_FAIL) {
list_for_each_entry_safe(scmd, next, work_q, eh_entry) {
if (!scsi_device_online(scmd->device) ||
+ rtn == FAST_IO_FAIL ||
(!scsi_eh_try_stu(scmd) && !scsi_eh_tur(scmd)) ||
!scsi_eh_tur(scmd))
scsi_eh_finish_cmd(scmd, done_q);
*/
return ADD_TO_MLQUEUE;
case GOOD:
+ scsi_handle_queue_ramp_up(scmd->device);
case COMMAND_TERMINATED:
return SUCCESS;
case TASK_ABORTED: