diff options
| author | Anand Jain <anand.jain@oracle.com> | 2018-05-29 12:28:37 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-09-15 09:46:56 +0200 |
| commit | 2d4bbb81bac654db2d5e66887d0a3be704aab060 (patch) | |
| tree | 0398ecb22a55fdddf12a53008612f9e023ee41f9 /fs/btrfs | |
| parent | 8515518d6365f19bc40ef6f8b690145c641cb4eb (diff) | |
btrfs: do btrfs_free_stale_devices outside of device_list_add
[ Upstream commit 4306a97449f9a0f9e5229af7889d4401315355aa ]
btrfs_free_stale_devices() looks for device path reused for another
filesystem, and deletes the older fs_devices::device entry.
In preparation to handle locking in device_list_add, move
btrfs_free_stale_devices outside as these two functions serve a
different purpose.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/btrfs')
| -rw-r--r-- | fs/btrfs/volumes.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 0bd8c544d2de..118c9275a2e2 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -750,7 +750,8 @@ error_brelse: * error pointer when failed */ static noinline struct btrfs_device *device_list_add(const char *path, - struct btrfs_super_block *disk_super) + struct btrfs_super_block *disk_super, + bool *new_device_added) { struct btrfs_device *device; struct btrfs_fs_devices *fs_devices; @@ -796,7 +797,7 @@ static noinline struct btrfs_device *device_list_add(const char *path, mutex_unlock(&fs_devices->device_list_mutex); device->fs_devices = fs_devices; - btrfs_free_stale_devices(path, device); + *new_device_added = true; if (disk_super->label[0]) pr_info("BTRFS: device label %s devid %llu transid %llu %s\n", @@ -1221,6 +1222,7 @@ int btrfs_scan_one_device(const char *path, fmode_t flags, void *holder, struct btrfs_fs_devices **fs_devices_ret) { struct btrfs_super_block *disk_super; + bool new_device_added = false; struct btrfs_device *device; struct block_device *bdev; struct page *page; @@ -1246,11 +1248,14 @@ int btrfs_scan_one_device(const char *path, fmode_t flags, void *holder, } mutex_lock(&uuid_mutex); - device = device_list_add(path, disk_super); - if (IS_ERR(device)) + device = device_list_add(path, disk_super, &new_device_added); + if (IS_ERR(device)) { ret = PTR_ERR(device); - else + } else { *fs_devices_ret = device->fs_devices; + if (new_device_added) + btrfs_free_stale_devices(path, device); + } mutex_unlock(&uuid_mutex); btrfs_release_disk_super(page); |