blkdev_put must not be called under sb->s_umount to avoid a lock order
reversal with disk->open_mutex once call backs from block devices to
the file system using the holder ops are supported. Move the call
to btrfs_close_devices into btrfs_free_fs_info so that it is closed
from ->kill_sb (which is also called from the mount failure handling
path unlike ->put_super) as well as when an fs_info is freed because
an existing superblock already exists.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
fs/btrfs/disk-io.c | 4 ++--
fs/btrfs/super.c | 7 ++-----
2 files changed, 4 insertions(+), 7 deletions(-)
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 7513388b0567be..3788b55638392e 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1243,6 +1243,8 @@ static void free_global_roots(struct btrfs_fs_info *fs_info)
void btrfs_free_fs_info(struct btrfs_fs_info *fs_info)
{
+ if (fs_info->fs_devices)
+ btrfs_close_devices(fs_info->fs_devices);
percpu_counter_destroy(&fs_info->dirty_metadata_bytes);
percpu_counter_destroy(&fs_info->delalloc_bytes);
percpu_counter_destroy(&fs_info->ordered_bytes);
@@ -3554,7 +3556,6 @@ int __cold open_ctree(struct super_block *sb, struct btrfs_fs_devices *fs_device
iput(fs_info->btree_inode);
fail:
- btrfs_close_devices(fs_info->fs_devices);
ASSERT(ret < 0);
return ret;
}
@@ -4408,7 +4409,6 @@ void __cold close_ctree(struct btrfs_fs_info *fs_info)
#endif
btrfs_mapping_tree_free(&fs_info->mapping_tree);
- btrfs_close_devices(fs_info->fs_devices);
}
void btrfs_mark_buffer_dirty(struct extent_buffer *buf)
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index b318bddefd5236..2bbc041ac2e2c5 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -1494,7 +1494,7 @@ static struct dentry *btrfs_mount_root(struct file_system_type *fs_type,
if (!(flags & SB_RDONLY) && fs_devices->rw_devices == 0) {
error = -EACCES;
- goto error_close_devices;
+ goto error_fs_info;
}
bdev = fs_devices->latest_dev->bdev;
@@ -1502,11 +1502,10 @@ static struct dentry *btrfs_mount_root(struct file_system_type *fs_type,
fs_info);
if (IS_ERR(s)) {
error = PTR_ERR(s);
- goto error_close_devices;
+ goto error_fs_info;
}
if (s->s_root) {
- btrfs_close_devices(fs_devices);
btrfs_free_fs_info(fs_info);
if ((flags ^ s->s_flags) & SB_RDONLY)
error = -EBUSY;
@@ -1527,8 +1526,6 @@ static struct dentry *btrfs_mount_root(struct file_system_type *fs_type,
return dget(s->s_root);
-error_close_devices:
- btrfs_close_devices(fs_devices);
error_fs_info:
btrfs_free_fs_info(fs_info);
error_sec_opts:
--
2.39.2
