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btrfs: backref: rename and move backref_cache_cleanup()

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Since we're releasing all existing nodes/edges, other than cleanup the
mess after error, "release" is a more proper naming here.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Qu Wenruo 2020-03-03 13:55:12 +08:00 committed by David Sterba
parent 023acb07bc
commit 13fe1bdb22
3 changed files with 36 additions and 31 deletions
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33
fs/btrfs/backref.c
View File

@ -2559,3 +2559,36 @@ void btrfs_backref_cleanup_node(struct btrfs_backref_cache *cache,
btrfs_backref_drop_node(cache, node);
}
/*
* Release all nodes/edges from current cache
*/
void btrfs_backref_release_cache(struct btrfs_backref_cache *cache)
{
struct btrfs_backref_node *node;
int i;
while (!list_empty(&cache->detached)) {
node = list_entry(cache->detached.next,
struct btrfs_backref_node, list);
btrfs_backref_cleanup_node(cache, node);
}
while (!list_empty(&cache->leaves)) {
node = list_entry(cache->leaves.next,
struct btrfs_backref_node, lower);
btrfs_backref_cleanup_node(cache, node);
}
cache->last_trans = 0;
for (i = 0; i < BTRFS_MAX_LEVEL; i++)
ASSERT(list_empty(&cache->pending[i]));
ASSERT(list_empty(&cache->pending_edge));
ASSERT(list_empty(&cache->useless_node));
ASSERT(list_empty(&cache->changed));
ASSERT(list_empty(&cache->detached));
ASSERT(RB_EMPTY_ROOT(&cache->rb_root));
ASSERT(!cache->nr_nodes);
ASSERT(!cache->nr_edges);
}

2
fs/btrfs/backref.h
View File

@ -353,4 +353,6 @@ static inline void btrfs_backref_drop_node(struct btrfs_backref_cache *tree,
void btrfs_backref_cleanup_node(struct btrfs_backref_cache *cache,
struct btrfs_backref_node *node);
void btrfs_backref_release_cache(struct btrfs_backref_cache *cache);
#endif

32
fs/btrfs/relocation.c
View File

@ -175,36 +175,6 @@ static void mapping_tree_init(struct mapping_tree *tree)
spin_lock_init(&tree->lock);
}
static void backref_cache_cleanup(struct btrfs_backref_cache *cache)
{
struct btrfs_backref_node *node;
int i;
while (!list_empty(&cache->detached)) {
node = list_entry(cache->detached.next,
struct btrfs_backref_node, list);
btrfs_backref_cleanup_node(cache, node);
}
while (!list_empty(&cache->leaves)) {
node = list_entry(cache->leaves.next,
struct btrfs_backref_node, lower);
btrfs_backref_cleanup_node(cache, node);
}
cache->last_trans = 0;
for (i = 0; i < BTRFS_MAX_LEVEL; i++)
ASSERT(list_empty(&cache->pending[i]));
ASSERT(list_empty(&cache->pending_edge));
ASSERT(list_empty(&cache->useless_node));
ASSERT(list_empty(&cache->changed));
ASSERT(list_empty(&cache->detached));
ASSERT(RB_EMPTY_ROOT(&cache->rb_root));
ASSERT(!cache->nr_nodes);
ASSERT(!cache->nr_edges);
}
static void backref_tree_panic(struct rb_node *rb_node, int errno, u64 bytenr)
{
@ -3948,7 +3918,7 @@ restart:
rc->create_reloc_tree = 0;
set_reloc_control(rc);
backref_cache_cleanup(&rc->backref_cache);
btrfs_backref_release_cache(&rc->backref_cache);
btrfs_block_rsv_release(fs_info, rc->block_rsv, (u64)-1, NULL);
/*