From: John Garry <john.garry@huawei.com>
To: <axboe@kernel.dk>, <damien.lemoal@opensource.wdc.com>,
<jejb@linux.ibm.com>, <martin.petersen@oracle.com>,
<jinpu.wang@cloud.ionos.com>, <hare@suse.de>,
<bvanassche@acm.org>, <hch@lst.de>, <ming.lei@redhat.com>,
<niklas.cassel@wdc.com>
Cc: <linux-block@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<linux-ide@vger.kernel.org>, <linux-scsi@vger.kernel.org>,
<linuxarm@huawei.com>, John Garry <john.garry@huawei.com>
Subject: [PATCH RFC v3 05/22] scsi: core: Add support for reserved command timeout handling
Date: Tue, 25 Oct 2022 18:17:59 +0800 [thread overview]
Message-ID: <1666693096-180008-6-git-send-email-john.garry@huawei.com> (raw)
In-Reply-To: <1666693096-180008-1-git-send-email-john.garry@huawei.com>
Add support for reserved timeout handling. Any driver which specifies
that it supports reserved tags must supply a handler.
Signed-off-by: John Garry <john.garry@huawei.com>
---
drivers/scsi/hosts.c | 15 +++++++++++----
drivers/scsi/scsi_error.c | 3 +++
include/scsi/scsi_host.h | 1 +
3 files changed, 15 insertions(+), 4 deletions(-)
diff --git a/drivers/scsi/hosts.c b/drivers/scsi/hosts.c
index 78968553089f..52346085b3c1 100644
--- a/drivers/scsi/hosts.c
+++ b/drivers/scsi/hosts.c
@@ -230,10 +230,17 @@ int scsi_add_host_with_dma(struct Scsi_Host *shost, struct device *dev,
goto fail;
}
- if (shost->nr_reserved_cmds && !sht->reserved_queuecommand) {
- shost_printk(KERN_ERR, shost,
- "nr_reserved_cmds set but no method to queue\n");
- goto fail;
+ if (shost->nr_reserved_cmds) {
+ if (!sht->reserved_queuecommand) {
+ shost_printk(KERN_ERR, shost,
+ "nr_reserved_cmds set but no method to queue\n");
+ goto fail;
+ }
+ if (!sht->reserved_timedout) {
+ shost_printk(KERN_ERR, shost,
+ "nr_reserved_cmds set but no method to handle timeouts\n");
+ goto fail;
+ }
}
/* Use min_t(int, ...) in case shost->can_queue exceeds SHRT_MAX */
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index 6995c8979230..2f86a4284f29 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -338,6 +338,9 @@ enum blk_eh_timer_return scsi_timeout(struct request *req)
if (host->eh_deadline != -1 && !host->last_reset)
host->last_reset = jiffies;
+ if (blk_mq_is_reserved_rq(req))
+ return host->hostt->reserved_timedout(scmd);
+
if (host->hostt->eh_timed_out)
rtn = host->hostt->eh_timed_out(scmd);
diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index a39f36aa0b0d..266c13e731de 100644
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -74,6 +74,7 @@ struct scsi_host_template {
*/
int (* queuecommand)(struct Scsi_Host *, struct scsi_cmnd *);
int (*reserved_queuecommand)(struct Scsi_Host *, struct scsi_cmnd *);
+ enum blk_eh_timer_return (*reserved_timedout)(struct scsi_cmnd *);
/*
* The commit_rqs function is used to trigger a hardware
--
2.35.3
next prev parent reply other threads:[~2022-10-25 9:48 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-25 10:17 [PATCH RFC v3 00/22] blk-mq/libata/scsi: SCSI driver tagging improvements Part I John Garry
2022-10-25 10:11 ` John Garry
2022-10-25 10:17 ` [PATCH RFC v3 01/22] blk-mq: Don't get budget for reserved requests John Garry
2022-10-27 1:16 ` Damien Le Moal
2022-10-27 9:09 ` John Garry
2022-10-25 10:17 ` [PATCH RFC v3 02/22] scsi: core: Add scsi_get_dev() John Garry
2022-10-25 10:17 ` [PATCH RFC v3 03/22] scsi: core: Implement reserved command handling John Garry
2022-10-27 1:18 ` Damien Le Moal
2022-10-27 7:51 ` Hannes Reinecke
2022-10-27 8:16 ` John Garry
2022-10-27 9:11 ` John Garry
2022-10-25 10:17 ` [PATCH RFC v3 04/22] scsi: core: Add support to send reserved commands John Garry
2022-10-27 1:21 ` Damien Le Moal
2022-10-27 9:13 ` John Garry
2022-10-27 9:18 ` Damien Le Moal
2022-10-25 10:17 ` John Garry [this message]
2022-10-25 10:18 ` [PATCH RFC v3 06/22] scsi: libsas: Improve sas_ex_discover_expander() error handling John Garry
2022-10-25 10:18 ` [PATCH RFC v3 07/22] scsi: libsas: Notify LLDD expander found before calling sas_rphy_add() John Garry
2022-10-25 10:18 ` [PATCH RFC v3 08/22] scsi: scsi_transport_sas: Alloc sdev for expander John Garry
2022-10-25 10:18 ` [PATCH RFC v3 09/22] scsi: libsas: Add sas_alloc_slow_task_rq() John Garry
2022-10-25 10:18 ` [PATCH RFC v3 10/22] scsi: libsas: Add sas_queuecommand_internal() John Garry
2022-10-25 10:18 ` [PATCH RFC v3 11/22] scsi: libsas: Add sas_internal_timeout() John Garry
2022-10-25 10:18 ` [PATCH RFC v3 12/22] scsi: core: Use SCSI_SCAN_RESCAN in __scsi_add_device() John Garry
2022-10-25 10:18 ` [PATCH RFC v3 13/22] scsi: scsi_transport_sas: Allocate end device target id in the rphy alloc John Garry
2022-10-25 10:18 ` [PATCH RFC v3 14/22] ata: libata-scsi: Add ata_scsi_setup_sdev() John Garry
2022-10-25 10:18 ` [PATCH RFC v3 15/22] scsi: libsas: Add sas_ata_setup_device() John Garry
2022-10-25 10:18 ` [PATCH RFC v3 16/22] ata: libata-scsi: Allocate sdev early in port probe John Garry
2022-10-27 1:34 ` Damien Le Moal
2022-10-27 8:11 ` Hannes Reinecke
2022-10-27 9:16 ` Damien Le Moal
2022-10-27 9:51 ` Hannes Reinecke
2022-11-07 10:09 ` John Garry
2022-11-07 10:20 ` Hannes Reinecke
2022-10-25 10:18 ` [PATCH RFC v3 17/22] scsi: libsas drivers: Reserve tags John Garry
2022-10-25 10:18 ` [PATCH RFC v3 18/22] scsi: libsas: Queue SMP commands as requests John Garry
2022-10-27 1:36 ` Damien Le Moal
2022-10-27 10:45 ` John Garry
2022-10-25 10:18 ` [PATCH RFC v3 19/22] scsi: libsas: Queue TMF " John Garry
2022-10-25 10:18 ` [PATCH RFC v3 20/22] scsi: core: Add scsi_alloc_request_hwq() John Garry
2022-10-25 10:18 ` [PATCH RFC v3 21/22] scsi: libsas: Queue internal abort commands as requests John Garry
2022-10-29 1:15 ` chenxiang (M)
2022-11-02 10:04 ` John Garry
2022-11-03 3:09 ` chenxiang (M)
2022-10-25 10:18 ` [PATCH RFC v3 22/22] scsi: libsas: Delete sas_task_slow.timer John Garry
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