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Make sure all dirty blocks are written at commit time 

Write dirty block groups may make some block groups dirty.
This patch make btrfs_write_dirty_block_groups properly
handle the recursion.

Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
master
Yan Zheng 2009-06-03 11:59:47 -04:00 committed by Chris Mason
parent 50860d6e31
commit 0030f1d3ae
1 changed files with 13 additions and 19 deletions
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32
extent-tree.c
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@ -1697,8 +1697,6 @@ int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
struct extent_io_tree *block_group_cache;
struct btrfs_block_group_cache *cache;
int ret;
int err = 0;
int werr = 0;
struct btrfs_path *path;
u64 last = 0;
u64 start;
@ -1713,30 +1711,26 @@ int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
while(1) {
ret = find_first_extent_bit(block_group_cache, last,
&start, &end, BLOCK_GROUP_DIRTY);
if (ret)
break;
if (ret) {
if (last == 0)
break;
last = 0;
continue;
}
last = end + 1;
ret = get_state_private(block_group_cache, start, &ptr);
if (ret)
break;
cache = (struct btrfs_block_group_cache *)(unsigned long)ptr;
err = write_one_cache_group(trans, root,
path, cache);
/*
* if we fail to write the cache group, we want
* to keep it marked dirty in hopes that a later
* write will work
*/
if (err) {
werr = err;
continue;
}
BUG_ON(ret);
clear_extent_bits(block_group_cache, start, end,
BLOCK_GROUP_DIRTY, GFP_NOFS);
cache = (struct btrfs_block_group_cache *)(unsigned long)ptr;
ret = write_one_cache_group(trans, root, path, cache);
BUG_ON(ret);
}
btrfs_free_path(path);
return werr;
return 0;
}
static struct btrfs_space_info *__find_space_info(struct btrfs_fs_info *info,