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scsi: core: No retries on abort success

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Add a new optional routine, eh_should_retry_cmd(), in scsi_host_template
that allows the transport to decide if a cmd is retryable. Return true if
the transport is in a state the cmd should be retried on.

Update scmd_eh_abort_handler() and scsi_eh_flush_done_q() to both call
scsi_eh_should_retry_cmd() to check whether the command needs to be
retried.

The above changes were based on a patch by Mike Christie.

Link: https://lore.kernel.org/r/1609969748-17684-3-git-send-email-muneendra.kumar@broadcom.com
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Muneendra Kumar <muneendra.kumar@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Muneendra Kumar 2021-01-07 03:19:05 +05:30 committed by Martin K. Petersen
parent 962c8dcdd5
commit 60bee27ba2
2 changed files with 21 additions and 2 deletions
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17
drivers/scsi/scsi_error.c
View File

@ -124,6 +124,17 @@ static bool scsi_cmd_retry_allowed(struct scsi_cmnd *cmd)
return ++cmd->retries <= cmd->allowed;
}
static bool scsi_eh_should_retry_cmd(struct scsi_cmnd *cmd)
{
struct scsi_device *sdev = cmd->device;
struct Scsi_Host *host = sdev->host;
if (host->hostt->eh_should_retry_cmd)
return host->hostt->eh_should_retry_cmd(cmd);
return true;
}
/**
* scmd_eh_abort_handler - Handle command aborts
* @work: command to be aborted.
@ -159,7 +170,8 @@ scmd_eh_abort_handler(struct work_struct *work)
"eh timeout, not retrying "
"aborted command\n"));
} else if (!scsi_noretry_cmd(scmd) &&
scsi_cmd_retry_allowed(scmd)) {
scsi_cmd_retry_allowed(scmd) &&
scsi_eh_should_retry_cmd(scmd)) {
SCSI_LOG_ERROR_RECOVERY(3,
scmd_printk(KERN_WARNING, scmd,
"retry aborted command\n"));
@ -2111,7 +2123,8 @@ void scsi_eh_flush_done_q(struct list_head *done_q)
list_for_each_entry_safe(scmd, next, done_q, eh_entry) {
list_del_init(&scmd->eh_entry);
if (scsi_device_online(scmd->device) &&
!scsi_noretry_cmd(scmd) && scsi_cmd_retry_allowed(scmd)) {
!scsi_noretry_cmd(scmd) && scsi_cmd_retry_allowed(scmd) &&
scsi_eh_should_retry_cmd(scmd)) {
SCSI_LOG_ERROR_RECOVERY(3,
scmd_printk(KERN_INFO, scmd,
"%s: flush retry cmd\n",

6
include/scsi/scsi_host.h
View File

@ -314,6 +314,12 @@ struct scsi_host_template {
* Status: OPTIONAL
*/
enum blk_eh_timer_return (*eh_timed_out)(struct scsi_cmnd *);
/*
* Optional routine that allows the transport to decide if a cmd
* is retryable. Return true if the transport is in a state the
* cmd should be retried on.
*/
bool (*eh_should_retry_cmd)(struct scsi_cmnd *scmd);
/* This is an optional routine that allows transport to initiate
* LLD adapter or firmware reset using sysfs attribute.