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Btrfs: Fix extent allocation for btree blocks as the disk fills

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Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2007-12-04 13:18:24 -05:00
parent 87ee04eb0f
commit 1a2b2ac78a
1 changed files with 17 additions and 11 deletions
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28
fs/btrfs/extent-tree.c
View file

@ -172,9 +172,7 @@ static u64 find_search_start(struct btrfs_root *root,
int wrapped = 0;
if (!cache) {
cache = btrfs_lookup_block_group(root->fs_info, search_start);
if (!cache)
return search_start;
goto out;
}
again:
ret = cache_block_group(root, cache);
@ -205,6 +203,13 @@ again:
return start;
}
out:
cache = btrfs_lookup_block_group(root->fs_info, search_start);
if (!cache) {
printk("Unable to find block group for %Lu\n",
search_start);
WARN_ON(1);
return search_start;
}
return search_start;
new_group:
@ -219,15 +224,14 @@ no_cache:
data = BTRFS_BLOCK_GROUP_MIXED;
goto wrapped;
}
return search_start;
goto out;
}
if (cache_miss && !cache->cached) {
cache_block_group(root, cache);
last = cache_miss;
cache = btrfs_lookup_block_group(root->fs_info, last);
}
if (!full_scan)
cache = btrfs_find_block_group(root, cache, last, data, 0);
cache = btrfs_find_block_group(root, cache, last, data, 0);
if (!cache)
goto no_cache;
*cache_ret = cache;
@ -985,12 +989,14 @@ static int find_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
search_end = btrfs_super_total_bytes(&info->super_copy);
if (hint_byte) {
block_group = btrfs_lookup_block_group(info, hint_byte);
if (!block_group)
hint_byte = search_start;
block_group = btrfs_find_block_group(root, block_group,
hint_byte, data, 1);
} else {
block_group = btrfs_find_block_group(root,
trans->block_group, 0,
data, 1);
trans->block_group,
search_start, data, 1);
}
total_needed += empty_size;
@ -1159,14 +1165,14 @@ enospc:
if (!full_scan)
total_needed -= empty_size;
full_scan = 1;
data = BTRFS_BLOCK_GROUP_MIXED;
} else
wrapped = 1;
}
block_group = btrfs_lookup_block_group(info, search_start);
cond_resched();
if (!full_scan)
block_group = btrfs_find_block_group(root, block_group,
search_start, data, 0);
block_group = btrfs_find_block_group(root, block_group,
search_start, data, 0);
goto check_failed;
error: