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q+qXteG4E2yBtdbRtCspM2pppGzsDpxb163vXK25NMYoKGgwgA6MncSIkpAoMlVGeroI61iPnzV mQTrxwcVEk/zaMKa4/3QesP7t9oKarCISP/KFBobkm5SDoOc/3FH From: John Garry Add scsi_mpath_dev_clear_path() to clear a device path when it becomes blocked. Signed-off-by: John Garry --- 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 48aab0df30b76..56200a7f5c748 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -35,6 +35,7 @@ #include #include /* scsi_init_limits() */ #include +#include #include @@ -3009,6 +3010,8 @@ 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 68fe50f62158c..b16fe6a55fa73 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 d2ef94ebd29af..2064a3e922748 100644 --- a/include/scsi/scsi_multipath.h +++ b/include/scsi/scsi_multipath.h @@ -55,6 +55,7 @@ int scsi_mpath_try_get_head(struct scsi_mpath_head *scsi_mpath_head); void scsi_mpath_put_head(struct scsi_mpath_head *scsi_mpath_head); void scsi_mpath_add_sysfs_link(struct scsi_device *sdev); void scsi_mpath_remove_sysfs_link(struct scsi_device *sdev); +void scsi_mpath_dev_clear_path(struct scsi_mpath_device *scsi_mpath_dev); #else /* CONFIG_SCSI_MULTIPATH */ struct scsi_mpath_head { @@ -99,5 +100,9 @@ static inline void scsi_mpath_add_sysfs_link(struct scsi_device *sdev) static inline void scsi_mpath_remove_sysfs_link(struct scsi_device *sdev) { } +static inline +void scsi_mpath_dev_clear_path(struct scsi_mpath_device *scsi_mpath_dev) +{ +} #endif /* CONFIG_SCSI_MULTIPATH */ #endif /* _SCSI_SCSI_MULTIPATH_H */ -- 2.43.7