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authorNikolay Borisov <nborisov@suse.com>2021-12-14 14:39:39 +0100
committerDavid Sterba <dsterba@suse.com>2022-01-07 14:18:26 +0100
commitc1227996438050ee1a592db40404a088a205e66f (patch)
tree99983cd8f7ec6eb39322ade4aa5000a3f9539406
parentbtrfs: skip transaction commit after failure to create subvolume (diff)
downloadlinux-c1227996438050ee1a592db40404a088a205e66f.tar.xz
linux-c1227996438050ee1a592db40404a088a205e66f.zip
btrfs: refactor unlock_up
The purpose of this function is to unlock all nodes in a btrfs path which are above 'lowest_unlock' and whose slot used is different than 0. As such it used slightly awkward structure of 'if' as well as somewhat cryptic "no_skip" control variable which denotes whether we should check the current level of skipability or no. This patch does the following (cosmetic) refactorings: * Renames 'no_skip' to 'check_skip' and makes it a boolean. This variable controls whether we are below the lowest_unlock/skip_level levels. * Consolidates the 2 conditions which warrant checking whether the current level should be skipped under 1 common if (check_skip) branch, this increase indentation level but is not critical. * Consolidates the 'skip_level < i && i >= lowest_unlock' and 'i >= lowest_unlock && i > skip_level' condition into a common branch since those are identical. * Eliminates the local extent_buffer variable as in this case it doesn't bring anything to function readability. Reviewed-by: Josef Bacik <josef@toxicpanda.com> Signed-off-by: Nikolay Borisov <nborisov@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
-rw-r--r--fs/btrfs/ctree.c31
1 files changed, 16 insertions, 15 deletions
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index defc494a2d08..a7db3f6f1b7b 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -1349,33 +1349,34 @@ static noinline void unlock_up(struct btrfs_path *path, int level,
{
int i;
int skip_level = level;
- int no_skips = 0;
- struct extent_buffer *t;
+ bool check_skip = true;
for (i = level; i < BTRFS_MAX_LEVEL; i++) {
if (!path->nodes[i])
break;
if (!path->locks[i])
break;
- if (!no_skips && path->slots[i] == 0) {
- skip_level = i + 1;
- continue;
- }
- if (!no_skips && path->keep_locks) {
- u32 nritems;
- t = path->nodes[i];
- nritems = btrfs_header_nritems(t);
- if (nritems < 1 || path->slots[i] >= nritems - 1) {
+
+ if (check_skip) {
+ if (path->slots[i] == 0) {
skip_level = i + 1;
continue;
}
+
+ if (path->keep_locks) {
+ u32 nritems;
+
+ nritems = btrfs_header_nritems(path->nodes[i]);
+ if (nritems < 1 || path->slots[i] >= nritems - 1) {
+ skip_level = i + 1;
+ continue;
+ }
+ }
}
- if (skip_level < i && i >= lowest_unlock)
- no_skips = 1;
- t = path->nodes[i];
if (i >= lowest_unlock && i > skip_level) {
- btrfs_tree_unlock_rw(t, path->locks[i]);
+ check_skip = false;
+ btrfs_tree_unlock_rw(path->nodes[i], path->locks[i]);
path->locks[i] = 0;
if (write_lock_level &&
i > min_write_lock_level &&