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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>
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@ -1697,8 +1697,6 @@ int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
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struct extent_io_tree *block_group_cache;
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struct btrfs_block_group_cache *cache;
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int ret;
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int err = 0;
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int werr = 0;
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struct btrfs_path *path;
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u64 last = 0;
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u64 start;
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@ -1713,30 +1711,26 @@ int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
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while(1) {
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ret = find_first_extent_bit(block_group_cache, last,
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&start, &end, BLOCK_GROUP_DIRTY);
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if (ret)
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break;
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if (ret) {
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if (last == 0)
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break;
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last = 0;
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continue;
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}
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last = end + 1;
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ret = get_state_private(block_group_cache, start, &ptr);
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if (ret)
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break;
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cache = (struct btrfs_block_group_cache *)(unsigned long)ptr;
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err = write_one_cache_group(trans, root,
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path, cache);
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/*
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* if we fail to write the cache group, we want
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* to keep it marked dirty in hopes that a later
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* write will work
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*/
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if (err) {
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werr = err;
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continue;
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}
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BUG_ON(ret);
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clear_extent_bits(block_group_cache, start, end,
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BLOCK_GROUP_DIRTY, GFP_NOFS);
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cache = (struct btrfs_block_group_cache *)(unsigned long)ptr;
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ret = write_one_cache_group(trans, root, path, cache);
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BUG_ON(ret);
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}
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btrfs_free_path(path);
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return werr;
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return 0;
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}
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static struct btrfs_space_info *__find_space_info(struct btrfs_fs_info *info,
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