[PATCH v6 16/27] scsi-multipath: clear path when device is blocked
John Garry <[email protected]>
| Newsgroups | gmane.linux.kernel.device-mapper.devel,gmane.linux.scsi,gmane.linux.kernel |
|---|---|
| Message-ID | <[email protected]> |
From: John Garry <[email protected]> Add scsi_mpath_dev_clear_path() to clear a device path when it becomes blocked. Signed-off-by: John Garry <[email protected]> --- drivers/scsi/scsi_lib.c | 3 +++ drivers/scsi/scsi_multipath.c | 10 ++++++++++ include/scsi/scsi_multipath.h | 5 +++++ 3 files changed, 18 insertions(+) diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index 22e2e3223440d..e2452392671f5 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -35,6 +35,7 @@ #include <scsi/scsi_host.h> #include <scsi/scsi_transport.h> /* scsi_init_limits() */ #include <scsi/scsi_dh.h> +#include <scsi/scsi_multipath.h> #include <trace/events/scsi.h> @@ -3016,6 +3017,8 @@ static void scsi_device_block(struct scsi_device *sdev, void *data) scsi_stop_queue(sdev); mutex_unlock(&sdev->state_mutex); + if ((err == 0) && sdev->scsi_mpath_dev) + scsi_mpath_dev_clear_path(sdev->scsi_mpath_dev); WARN_ONCE(err, "%s: failed to block %s in state %d\n", __func__, dev_name(&sdev->sdev_gendev), state); diff --git a/drivers/scsi/scsi_multipath.c b/drivers/scsi/scsi_multipath.c index 0d439cac6447a..b23cd6f12c602 100644 --- a/drivers/scsi/scsi_multipath.c +++ b/drivers/scsi/scsi_multipath.c @@ -238,6 +238,16 @@ static int scsi_multipath_sdev_init(struct scsi_device *sdev) return 0; } +void scsi_mpath_dev_clear_path(struct scsi_mpath_device *scsi_mpath_dev) +{ + struct mpath_device *mpath_device = &scsi_mpath_dev->mpath_device; + struct scsi_mpath_head *scsi_mpath_head = scsi_mpath_dev->scsi_mpath_head; + struct mpath_head *mpath_head = &scsi_mpath_head->mpath_head; + + if (mpath_clear_current_path(mpath_device)) + mpath_synchronize(mpath_head); +} + static void scsi_mpath_clone_end_io(struct bio *clone) { struct bio *master_bio = clone->bi_private; diff --git a/include/scsi/scsi_multipath.h b/include/scsi/scsi_multipath.h index 5cc37acaa664f..8f58c44d96a77 100644 --- a/include/scsi/scsi_multipath.h +++ b/include/scsi/scsi_multipath.h @@ -54,6 +54,7 @@ void scsi_mpath_add_sysfs_link(struct scsi_device *sdev); void scsi_mpath_remove_sysfs_link(struct scsi_device *sdev); int scsi_mpath_get_head(struct scsi_mpath_head *scsi_mpath_head); void scsi_mpath_put_head(struct scsi_mpath_head *scsi_mpath_head); +void scsi_mpath_dev_clear_path(struct scsi_mpath_device *scsi_mpath_dev); #else /* CONFIG_SCSI_MULTIPATH */ struct scsi_mpath_head { @@ -88,6 +89,10 @@ static inline void scsi_mpath_put_head(struct scsi_mpath_head *scsi_mpath_head) { } +static inline +void scsi_mpath_dev_clear_path(struct scsi_mpath_device *scsi_mpath_dev) +{ +} static inline void scsi_mpath_add_sysfs_link(struct scsi_device *sdev) { } -- 2.43.7