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btrfs: use btrfs_read_node_slot in qgroup_trace_new_subtree_blocks

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We're open-coding btrfs_read_node_slot() here, replace with the helper.

Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Josef Bacik 2020-11-05 10:45:16 -05:00 committed by David Sterba
parent 6b2cb7cb95
commit 3acfbd6a99
1 changed files with 1 additions and 10 deletions
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11
fs/btrfs/qgroup.c
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@ -2052,10 +2052,8 @@ static int qgroup_trace_new_subtree_blocks(struct btrfs_trans_handle* trans,
/* Read the tree block if needed */
if (dst_path->nodes[cur_level] == NULL) {
struct btrfs_key first_key;
int parent_slot;
u64 child_gen;
u64 child_bytenr;
/*
* dst_path->nodes[root_level] must be initialized before
@ -2074,23 +2072,16 @@ static int qgroup_trace_new_subtree_blocks(struct btrfs_trans_handle* trans,
*/
eb = dst_path->nodes[cur_level + 1];
parent_slot = dst_path->slots[cur_level + 1];
child_bytenr = btrfs_node_blockptr(eb, parent_slot);
child_gen = btrfs_node_ptr_generation(eb, parent_slot);
btrfs_node_key_to_cpu(eb, &first_key, parent_slot);
/* This node is old, no need to trace */
if (child_gen < last_snapshot)
goto out;
eb = read_tree_block(fs_info, child_bytenr, child_gen,
cur_level, &first_key);
eb = btrfs_read_node_slot(eb, parent_slot);
if (IS_ERR(eb)) {
ret = PTR_ERR(eb);
goto out;
} else if (!extent_buffer_uptodate(eb)) {
free_extent_buffer(eb);
ret = -EIO;
goto out;
}
dst_path->nodes[cur_level] = eb;