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authorTARUISI Hiroaki <taruishi.hiroak@jp.fujitsu.com>2010-02-09 06:36:45 +0000
committerChris Mason <chris.mason@oracle.com>2010-03-15 11:00:10 -0400
commit3a0524dc054791688177544fe510d2868ee20d9f (patch)
tree4038b649e33a7f41fd653a16af5766ca9cc6b7c5 /fs
parent1e701a3292e25a6c4939cad9f24951dc6b6ad853 (diff)
btrfs: Update existing btrfs_device for renaming device
When we scan devices in a multi-device filesystem, we memorize the original name. If the device gets a new name, later scans don't update the in-kernel structures related to it, and we're not able to mount the filesystem. This patch updates device name during scaning. Signed-off-by: TARUISI Hiroaki <taruishi.hiroak@jp.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/btrfs/volumes.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index ace2e8d7bbc..eb89e1317ac 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -365,6 +365,7 @@ static noinline int device_list_add(const char *path,
struct btrfs_device *device;
struct btrfs_fs_devices *fs_devices;
u64 found_transid = btrfs_super_generation(disk_super);
+ char *name;
fs_devices = find_fsid(disk_super->fsid);
if (!fs_devices) {
@@ -411,6 +412,12 @@ static noinline int device_list_add(const char *path,
device->fs_devices = fs_devices;
fs_devices->num_devices++;
+ } else if (strcmp(device->name, path)) {
+ name = kstrdup(path, GFP_NOFS);
+ if (!name)
+ return -ENOMEM;
+ kfree(device->name);
+ device->name = name;
}
if (found_transid > fs_devices->latest_trans) {