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| author | Qu Wenruo <wqu@suse.com> | 2018-09-21 15:20:29 +0800 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2018-10-15 17:23:40 +0200 |
| commit | 98ff7b94e4daca8d7ea4352a9a7905cced597a4c (patch) | |
| tree | bce4a901aad1c0a2f04bbff9b092c88082033b34 /fs/btrfs/relocation.c | |
| parent | 3628b4ca64f24a4ec55055597d0cb1c814729f8b (diff) | |
| download | linux-98ff7b94e4daca8d7ea4352a9a7905cced597a4c.tar.bz2 | |
btrfs: relocation: Cleanup while loop using rbtree_postorder_for_each_entry_safe
And add one line comment explaining what we're doing for each loop.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/relocation.c')
| -rw-r--r-- | fs/btrfs/relocation.c | 23 |
1 files changed, 8 insertions, 15 deletions
diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c index 3e6e3d93caad..0c1bc7df06a2 100644 --- a/fs/btrfs/relocation.c +++ b/fs/btrfs/relocation.c @@ -2991,7 +2991,7 @@ int relocate_tree_blocks(struct btrfs_trans_handle *trans, struct backref_node *node; struct btrfs_path *path; struct tree_block *block; - struct rb_node *rb_node; + struct tree_block *next; int ret; int err = 0; @@ -3001,29 +3001,23 @@ int relocate_tree_blocks(struct btrfs_trans_handle *trans, goto out_free_blocks; } - rb_node = rb_first(blocks); - while (rb_node) { - block = rb_entry(rb_node, struct tree_block, rb_node); + /* Kick in readahead for tree blocks with missing keys */ + rbtree_postorder_for_each_entry_safe(block, next, blocks, rb_node) { if (!block->key_ready) readahead_tree_block(fs_info, block->bytenr); - rb_node = rb_next(rb_node); } - rb_node = rb_first(blocks); - while (rb_node) { - block = rb_entry(rb_node, struct tree_block, rb_node); + /* Get first keys */ + rbtree_postorder_for_each_entry_safe(block, next, blocks, rb_node) { if (!block->key_ready) { err = get_tree_block_key(fs_info, block); if (err) goto out_free_path; } - rb_node = rb_next(rb_node); } - rb_node = rb_first(blocks); - while (rb_node) { - block = rb_entry(rb_node, struct tree_block, rb_node); - + /* Do tree relocation */ + rbtree_postorder_for_each_entry_safe(block, next, blocks, rb_node) { node = build_backref_tree(rc, &block->key, block->level, block->bytenr); if (IS_ERR(node)) { @@ -3034,11 +3028,10 @@ int relocate_tree_blocks(struct btrfs_trans_handle *trans, ret = relocate_tree_block(trans, rc, node, &block->key, path); if (ret < 0) { - if (ret != -EAGAIN || rb_node == rb_first(blocks)) + if (ret != -EAGAIN || &block->rb_node == rb_first(blocks)) err = ret; goto out; } - rb_node = rb_next(rb_node); } out: err = finish_pending_nodes(trans, rc, path, err); |