summaryrefslogtreecommitdiffstats
path: root/fs/btrfs/dev-replace.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/btrfs/dev-replace.c')
-rw-r--r--fs/btrfs/dev-replace.c35
1 files changed, 25 insertions, 10 deletions
diff --git a/fs/btrfs/dev-replace.c b/fs/btrfs/dev-replace.c
index 55c15f31d00d..ee0989c7e3a9 100644
--- a/fs/btrfs/dev-replace.c
+++ b/fs/btrfs/dev-replace.c
@@ -603,17 +603,33 @@ static int btrfs_dev_replace_finishing(struct btrfs_fs_info *fs_info,
}
btrfs_wait_ordered_roots(fs_info, U64_MAX, 0, (u64)-1);
- trans = btrfs_start_transaction(root, 0);
- if (IS_ERR(trans)) {
- mutex_unlock(&dev_replace->lock_finishing_cancel_unmount);
- return PTR_ERR(trans);
+ /*
+ * We have to use this loop approach because at this point src_device
+ * has to be available for transaction commit to complete, yet new
+ * chunks shouldn't be allocated on the device.
+ */
+ while (1) {
+ trans = btrfs_start_transaction(root, 0);
+ if (IS_ERR(trans)) {
+ mutex_unlock(&dev_replace->lock_finishing_cancel_unmount);
+ return PTR_ERR(trans);
+ }
+ ret = btrfs_commit_transaction(trans);
+ WARN_ON(ret);
+
+ /* Prevent write_all_supers() during the finishing procedure */
+ mutex_lock(&fs_info->fs_devices->device_list_mutex);
+ /* Prevent new chunks being allocated on the source device */
+ mutex_lock(&fs_info->chunk_mutex);
+
+ if (!list_empty(&src_device->post_commit_list)) {
+ mutex_unlock(&fs_info->fs_devices->device_list_mutex);
+ mutex_unlock(&fs_info->chunk_mutex);
+ } else {
+ break;
+ }
}
- ret = btrfs_commit_transaction(trans);
- WARN_ON(ret);
- /* keep away write_all_supers() during the finishing procedure */
- mutex_lock(&fs_info->fs_devices->device_list_mutex);
- mutex_lock(&fs_info->chunk_mutex);
down_write(&dev_replace->rwsem);
dev_replace->replace_state =
scrub_ret ? BTRFS_IOCTL_DEV_REPLACE_STATE_CANCELED
@@ -662,7 +678,6 @@ static int btrfs_dev_replace_finishing(struct btrfs_fs_info *fs_info,
btrfs_device_set_disk_total_bytes(tgt_device,
src_device->disk_total_bytes);
btrfs_device_set_bytes_used(tgt_device, src_device->bytes_used);
- ASSERT(list_empty(&src_device->post_commit_list));
tgt_device->commit_total_bytes = src_device->commit_total_bytes;
tgt_device->commit_bytes_used = src_device->bytes_used;