This is a note to let you know that I've just added the patch titled
block: fix surprise removal for drivers calling blk_set_queue_dying
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
block-fix-surprise-removal-for-drivers-calling-blk_s.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit d2da2942d3a84f4d6db7e5ceaef2094cd23aa307
Author: Christoph Hellwig <hch@xxxxxx>
Date: Thu Feb 17 08:52:31 2022 +0100
block: fix surprise removal for drivers calling blk_set_queue_dying
[ Upstream commit 7a5428dcb7902700b830e912feee4e845df7c019 ]
Various block drivers call blk_set_queue_dying to mark a disk as dead due
to surprise removal events, but since commit 8e141f9eb803 that doesn't
work given that the GD_DEAD flag needs to be set to stop I/O.
Replace the driver calls to blk_set_queue_dying with a new (and properly
documented) blk_mark_disk_dead API, and fold blk_set_queue_dying into the
only remaining caller.
Fixes: 8e141f9eb803 ("block: drain file system I/O on del_gendisk")
Reported-by: Markus Blöchl <markus.bloechl@xxxxxxxxxxxxx>
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Sagi Grimberg <sagi@xxxxxxxxxxx>
Link: https://lore.kernel.org/r/20220217075231.1140-1-hch@xxxxxx
Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/block/blk-core.c b/block/blk-core.c
index d42a0f3ff7361..42ac3a985c2d7 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -350,13 +350,6 @@ void blk_queue_start_drain(struct request_queue *q)
wake_up_all(&q->mq_freeze_wq);
}
-void blk_set_queue_dying(struct request_queue *q)
-{
- blk_queue_flag_set(QUEUE_FLAG_DYING, q);
- blk_queue_start_drain(q);
-}
-EXPORT_SYMBOL_GPL(blk_set_queue_dying);
-
/**
* blk_cleanup_queue - shutdown a request queue
* @q: request queue to shutdown
@@ -374,7 +367,8 @@ void blk_cleanup_queue(struct request_queue *q)
WARN_ON_ONCE(blk_queue_registered(q));
/* mark @q DYING, no new request or merges will be allowed afterwards */
- blk_set_queue_dying(q);
+ blk_queue_flag_set(QUEUE_FLAG_DYING, q);
+ blk_queue_start_drain(q);
blk_queue_flag_set(QUEUE_FLAG_NOMERGES, q);
blk_queue_flag_set(QUEUE_FLAG_NOXMERGES, q);
diff --git a/block/genhd.c b/block/genhd.c
index de789d1a1e3d2..2dcedbe4ef046 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -544,6 +544,20 @@ int device_add_disk(struct device *parent, struct gendisk *disk,
}
EXPORT_SYMBOL(device_add_disk);
+/**
+ * blk_mark_disk_dead - mark a disk as dead
+ * @disk: disk to mark as dead
+ *
+ * Mark as disk as dead (e.g. surprise removed) and don't accept any new I/O
+ * to this disk.
+ */
+void blk_mark_disk_dead(struct gendisk *disk)
+{
+ set_bit(GD_DEAD, &disk->state);
+ blk_queue_start_drain(disk->queue);
+}
+EXPORT_SYMBOL_GPL(blk_mark_disk_dead);
+
/**
* del_gendisk - remove the gendisk
* @disk: the struct gendisk to remove
diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c
index 901855717cb53..ba61e72741eab 100644
--- a/drivers/block/mtip32xx/mtip32xx.c
+++ b/drivers/block/mtip32xx/mtip32xx.c
@@ -4112,7 +4112,7 @@ static void mtip_pci_remove(struct pci_dev *pdev)
"Completion workers still active!\n");
}
- blk_set_queue_dying(dd->queue);
+ blk_mark_disk_dead(dd->disk);
set_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag);
/* Clean up the block layer. */
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index e65c9d706f6fb..c4a52f33604dc 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -7182,7 +7182,7 @@ static ssize_t do_rbd_remove(struct bus_type *bus,
* IO to complete/fail.
*/
blk_mq_freeze_queue(rbd_dev->disk->queue);
- blk_set_queue_dying(rbd_dev->disk->queue);
+ blk_mark_disk_dead(rbd_dev->disk);
}
del_gendisk(rbd_dev->disk);
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 4dbb71230d6e7..3efd341959832 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -2128,7 +2128,7 @@ static void blkfront_closing(struct blkfront_info *info)
/* No more blkif_request(). */
blk_mq_stop_hw_queues(info->rq);
- blk_set_queue_dying(info->rq);
+ blk_mark_disk_dead(info->gd);
set_capacity(info->gd, 0);
for_each_rinfo(info, rinfo, i) {
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index b75ff6b2b9525..5f33700d12473 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -2156,7 +2156,7 @@ static void __dm_destroy(struct mapped_device *md, bool wait)
set_bit(DMF_FREEING, &md->flags);
spin_unlock(&_minor_lock);
- blk_set_queue_dying(md->queue);
+ blk_mark_disk_dead(md->disk);
/*
* Take suspend_lock so that presuspend and postsuspend methods
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index ab1892886b453..739ffbfad6283 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -4484,7 +4484,7 @@ static void nvme_set_queue_dying(struct nvme_ns *ns)
if (test_and_set_bit(NVME_NS_DEAD, &ns->flags))
return;
- blk_set_queue_dying(ns->queue);
+ blk_mark_disk_dead(ns->disk);
nvme_start_ns_queue(ns);
set_capacity_and_notify(ns->disk, 0);
diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c
index 2f76969408b27..727520c397109 100644
--- a/drivers/nvme/host/multipath.c
+++ b/drivers/nvme/host/multipath.c
@@ -792,7 +792,7 @@ void nvme_mpath_remove_disk(struct nvme_ns_head *head)
{
if (!head->disk)
return;
- blk_set_queue_dying(head->disk->queue);
+ blk_mark_disk_dead(head->disk);
/* make sure all pending bios are cleaned up */
kblockd_schedule_work(&head->requeue_work);
flush_work(&head->requeue_work);
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index be8e7a55d803c..413c0148c0ce5 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1184,7 +1184,8 @@ extern void blk_dump_rq_flags(struct request *, char *);
bool __must_check blk_get_queue(struct request_queue *);
extern void blk_put_queue(struct request_queue *);
-extern void blk_set_queue_dying(struct request_queue *);
+
+void blk_mark_disk_dead(struct gendisk *disk);
#ifdef CONFIG_BLOCK
/*
--
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