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From: Hannes Reinecke <hare@suse.de>
To: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: Christoph Hellwig <hch@lst.de>,
	James Bottomley <james.bottomley@hansenpartnership.com>,
	linux-scsi@vger.kernel.org, Hannes Reinecke <hare@suse.de>
Subject: [PATCH 07/11] scsi: add scsi_host_quiesce()/scsi_host_resume() helper
Date: Wed, 20 Nov 2019 11:31:10 +0100	[thread overview]
Message-ID: <20191120103114.24723-8-hare@suse.de> (raw)
In-Reply-To: <20191120103114.24723-1-hare@suse.de>

Add helper functions for quiescing/resuming all devices on a
given scsi host.

Signed-off-by: Hannes Reinecke <hare@suse.de>
---
 drivers/scsi/scsi_lib.c    | 18 ++++++++++++++++++
 include/scsi/scsi_device.h |  2 ++
 2 files changed, 20 insertions(+)

diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 2563b061f56b..771a8352d3e8 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -2630,6 +2630,24 @@ scsi_target_resume(struct scsi_target *starget)
 }
 EXPORT_SYMBOL(scsi_target_resume);
 
+void scsi_host_quiesce(struct Scsi_Host *shost)
+{
+	struct scsi_device *sdev;
+
+	shost_for_each_device(sdev, shost)
+		scsi_device_quiesce(sdev);
+}
+EXPORT_SYMBOL(scsi_host_quiesce);
+
+void scsi_host_resume(struct Scsi_Host *shost)
+{
+	struct scsi_device *sdev;
+
+	shost_for_each_device(sdev, shost)
+		scsi_device_resume(sdev);
+}
+EXPORT_SYMBOL(scsi_host_resume);
+
 /**
  * scsi_internal_device_block_nowait - try to transition to the SDEV_BLOCK state
  * @sdev: device to block
diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h
index 3ed836db5306..2185068ce955 100644
--- a/include/scsi/scsi_device.h
+++ b/include/scsi/scsi_device.h
@@ -420,6 +420,8 @@ extern int scsi_device_quiesce(struct scsi_device *sdev);
 extern void scsi_device_resume(struct scsi_device *sdev);
 extern void scsi_target_quiesce(struct scsi_target *);
 extern void scsi_target_resume(struct scsi_target *);
+extern void scsi_host_quiesce(struct Scsi_Host *);
+extern void scsi_host_resume(struct Scsi_Host *);
 extern void scsi_scan_target(struct device *parent, unsigned int channel,
 			     unsigned int id, u64 lun,
 			     enum scsi_scan_mode rescan);
-- 
2.16.4


  parent reply	other threads:[~2019-11-20 10:31 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-20 10:31 [PATCHv5 00/11] scsi: remove legacy cmd_list implementation Hannes Reinecke
2019-11-20 10:31 ` [PATCH 01/11] dpt_i2o: rename adpt_i2o_to_scsi() to adpt_i2o_scsi_complete() Hannes Reinecke
2019-11-26 16:54   ` Christoph Hellwig
2019-11-20 10:31 ` [PATCH 02/11] scsi: add scsi_host_flush_commands() helper Hannes Reinecke
2019-11-20 16:19   ` Bart Van Assche
2019-11-21 15:46     ` Hannes Reinecke
2019-11-26 16:55   ` Christoph Hellwig
2019-11-26 18:25     ` Hannes Reinecke
2019-11-20 10:31 ` [PATCH 03/11] dpt_i2o: use scsi_host_flush_commands() to abort outstanding commands Hannes Reinecke
2019-11-26 16:55   ` Christoph Hellwig
2019-11-20 10:31 ` [PATCH 04/11] aacraid: Do not wait for outstanding write commands on synchronize_cache Hannes Reinecke
2019-11-26 17:02   ` Christoph Hellwig
2019-11-28 11:40   ` Balsundar.P
2019-11-20 10:31 ` [PATCH 05/11] aacraid: use midlayer helper to terminate outstanding commands Hannes Reinecke
2019-11-26 17:02   ` Christoph Hellwig
2019-11-28 11:41   ` Balsundar.P
2019-11-20 10:31 ` [PATCH 06/11] aacraid: replace aac_flush_ios() with midlayer helper Hannes Reinecke
2019-11-20 16:14   ` Bart Van Assche
2019-11-28 11:41   ` Balsundar.P
2019-11-20 10:31 ` Hannes Reinecke [this message]
2019-11-20 10:31 ` [PATCH 08/11] aacraid: use scsi_host_quiesce() to wait for I/O to complete Hannes Reinecke
2019-11-20 16:23   ` Bart Van Assche
2019-11-26  8:29   ` Balsundar.P
2019-11-28 11:45   ` Balsundar.P
2019-11-28 12:09     ` Hannes Reinecke
2019-12-04 15:02       ` Hannes Reinecke
2019-11-20 10:31 ` [PATCH 09/11] scsi: add scsi_host_busy_iter() Hannes Reinecke
2019-11-20 10:31 ` [PATCH 10/11] aacraid: use scsi_host_busy_iter() in get_num_of_incomplete_fibs() Hannes Reinecke
2019-11-28 11:42   ` Balsundar.P
2019-11-20 10:31 ` [PATCH 11/11] scsi: Remove cmd_list functionality Hannes Reinecke

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