korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-09-22 12:44:11 +08:00
Code Issues Packages Projects Releases Wiki Activity

Btrfs: stop joining the log transaction if sync log fails

Browse Source 
If the log sync fails, there is something wrong in the log tree, we
should not continue to join the log transaction and log the metadata.
What we should do is to do a full commit.

This patch fixes this problem by setting ->last_trans_log_full_commit
to the current transaction id, it will tell the tasks not to join
the log transaction, and do a full commit.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fb.com>
This commit is contained in:
Miao Xie 2014-02-20 18:08:57 +08:00 committed by Josef Bacik
parent d1433debe7
commit 50471a388c
1 changed files with 14 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
fs/btrfs/tree-log.c
View File

@ -144,6 +144,12 @@ static int start_log_trans(struct btrfs_trans_handle *trans,
mutex_lock(&root->log_mutex);
if (root->log_root) {
if (ACCESS_ONCE(root->fs_info->last_trans_log_full_commit) ==
trans->transid) {
ret = -EAGAIN;
goto out;
}
if (!root->log_start_pid) {
root->log_start_pid = current->pid;
root->log_multiple_pids = false;
@ -2527,6 +2533,8 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
blk_finish_plug(&plug);
btrfs_abort_transaction(trans, root, ret);
btrfs_free_logged_extents(log, log_transid);
ACCESS_ONCE(root->fs_info->last_trans_log_full_commit) =
trans->transid;
mutex_unlock(&root->log_mutex);
goto out;
}
@ -2569,13 +2577,13 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
list_del_init(&root_log_ctx.list);
blk_finish_plug(&plug);
ACCESS_ONCE(root->fs_info->last_trans_log_full_commit) =
trans->transid;
if (ret != -ENOSPC) {
btrfs_abort_transaction(trans, root, ret);
mutex_unlock(&log_root_tree->log_mutex);
goto out;
}
ACCESS_ONCE(root->fs_info->last_trans_log_full_commit) =
trans->transid;
btrfs_wait_marked_extents(log, &log->dirty_log_pages, mark);
btrfs_free_logged_extents(log, log_transid);
mutex_unlock(&log_root_tree->log_mutex);
@ -2629,6 +2637,8 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
EXTENT_DIRTY | EXTENT_NEW);
blk_finish_plug(&plug);
if (ret) {
ACCESS_ONCE(root->fs_info->last_trans_log_full_commit) =
trans->transid;
btrfs_abort_transaction(trans, root, ret);
btrfs_free_logged_extents(log, log_transid);
mutex_unlock(&log_root_tree->log_mutex);
@ -2657,6 +2667,8 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
*/
ret = write_ctree_super(trans, root->fs_info->tree_root, 1);
if (ret) {
ACCESS_ONCE(root->fs_info->last_trans_log_full_commit) =
trans->transid;
btrfs_abort_transaction(trans, root, ret);
goto out_wake_log_root;
}