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btrfs: zoned: advance allocation pointer after tree log node 

Since the allocation info of a tree log node is not recorded in the extent
tree, calculate_alloc_pointer() cannot detect this node, so the pointer
can be over a tree node.

Replaying the log calls btrfs_remove_free_space() for each node in the
log tree.

So, advance the pointer after the node to not allocate over it.

Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Naohiro Aota 2021-02-04 19:21:55 +09:00 committed by David Sterba
parent d3575156f6
commit 011b41bffa
1 changed files with 15 additions and 1 deletions
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16
fs/btrfs/free-space-cache.c
View File

@ -2628,8 +2628,22 @@ int btrfs_remove_free_space(struct btrfs_block_group *block_group,
int ret;
bool re_search = false;
if (btrfs_is_zoned(block_group->fs_info))
if (btrfs_is_zoned(block_group->fs_info)) {
/*
* This can happen with conventional zones when replaying log.
* Since the allocation info of tree-log nodes are not recorded
* to the extent-tree, calculate_alloc_pointer() failed to
* advance the allocation pointer after last allocated tree log
* node blocks.
*
* This function is called from
* btrfs_pin_extent_for_log_replay() when replaying the log.
* Advance the pointer not to overwrite the tree-log nodes.
*/
if (block_group->alloc_offset < offset + bytes)
block_group->alloc_offset = offset + bytes;
return 0;
}
spin_lock(&ctl->tree_lock);