blob: 71898849e365994f2f23adaf2aa718ed19cbeb2d [file] [log] [blame]
From 40f671a4527f937c1d35cf09365d7fedf057e6be Mon Sep 17 00:00:00 2001
From: Anthony Iliopoulos <ailiop@suse.com>
Date: Tue, 14 Jul 2020 13:11:59 +0200
Subject: [PATCH] nvme: explicitly update mpath disk capacity on revalidation
commit 05b29021fba5e725dd385151ef00b6340229b500 upstream.
Commit 3b4b19721ec652 ("nvme: fix possible deadlock when I/O is
blocked") reverted multipath head disk revalidation due to deadlocks
caused by holding the bd_mutex during revalidate.
Updating the multipath disk blockdev size is still required though for
userspace to be able to observe any resizing while the device is
mounted. Directly update the bdev inode size to avoid unnecessarily
holding the bdev->bd_mutex.
Fixes: 3b4b19721ec652 ("nvme: fix possible deadlock when I/O is
blocked")
Signed-off-by: Anthony Iliopoulos <ailiop@suse.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 1a10f777e36f..eee1711d9639 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -1782,6 +1782,7 @@ static void __nvme_revalidate_disk(struct gendisk *disk, struct nvme_id_ns *id)
if (ns->head->disk) {
nvme_update_disk_info(ns->head->disk, ns, id);
blk_queue_stack_limits(ns->head->disk->queue, ns->queue);
+ nvme_mpath_update_disk_size(ns->head->disk);
}
#endif
}
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index 08f72d018296..9036cf3c44b4 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -504,6 +504,16 @@ static inline void nvme_mpath_check_last_path(struct nvme_ns *ns)
kblockd_schedule_work(&head->requeue_work);
}
+static inline void nvme_mpath_update_disk_size(struct gendisk *disk)
+{
+ struct block_device *bdev = bdget_disk(disk, 0);
+
+ if (bdev) {
+ bd_set_size(bdev, get_capacity(disk) << SECTOR_SHIFT);
+ bdput(bdev);
+ }
+}
+
extern struct device_attribute dev_attr_ana_grpid;
extern struct device_attribute dev_attr_ana_state;
extern struct device_attribute subsys_attr_iopolicy;
@@ -574,6 +584,9 @@ static inline void nvme_mpath_wait_freeze(struct nvme_subsystem *subsys)
static inline void nvme_mpath_start_freeze(struct nvme_subsystem *subsys)
{
}
+static inline void nvme_mpath_update_disk_size(struct gendisk *disk)
+{
+}
#endif /* CONFIG_NVME_MULTIPATH */
#ifdef CONFIG_NVM
--
2.27.0