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btrfs: backref: rename and move alloc_backref_node() 

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 13:21:30 +08:00 committed by David Sterba
parent 584fb12187
commit b1818dab9b
3 changed files with 29 additions and 26 deletions
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21
fs/btrfs/backref.c
View File

@ -2482,3 +2482,24 @@ void btrfs_backref_init_cache(struct btrfs_fs_info *fs_info,
cache->fs_info = fs_info;
cache->is_reloc = is_reloc;
}
struct btrfs_backref_node *btrfs_backref_alloc_node(
struct btrfs_backref_cache *cache, u64 bytenr, int level)
{
struct btrfs_backref_node *node;
ASSERT(level >= 0 && level < BTRFS_MAX_LEVEL);
node = kzalloc(sizeof(*node), GFP_NOFS);
if (!node)
return node;
INIT_LIST_HEAD(&node->list);
INIT_LIST_HEAD(&node->upper);
INIT_LIST_HEAD(&node->lower);
RB_CLEAR_NODE(&node->rb_node);
cache->nr_nodes++;
node->level = level;
node->bytenr = bytenr;
return node;
}

2
fs/btrfs/backref.h
View File

@ -270,5 +270,7 @@ struct btrfs_backref_cache {
void btrfs_backref_init_cache(struct btrfs_fs_info *fs_info,
struct btrfs_backref_cache *cache, int is_reloc);
struct btrfs_backref_node *btrfs_backref_alloc_node(
struct btrfs_backref_cache *cache, u64 bytenr, int level);
#endif

32
fs/btrfs/relocation.c
View File

@ -208,27 +208,6 @@ static void backref_cache_cleanup(struct btrfs_backref_cache *cache)
ASSERT(!cache->nr_edges);
}
static struct btrfs_backref_node *alloc_backref_node(
struct btrfs_backref_cache *cache, u64 bytenr, int level)
{
struct btrfs_backref_node *node;
ASSERT(level >= 0 && level < BTRFS_MAX_LEVEL);
node = kzalloc(sizeof(*node), GFP_NOFS);
if (!node)
return node;
INIT_LIST_HEAD(&node->list);
INIT_LIST_HEAD(&node->upper);
INIT_LIST_HEAD(&node->lower);
RB_CLEAR_NODE(&node->rb_node);
cache->nr_nodes++;
node->level = level;
node->bytenr = bytenr;
return node;
}
static void free_backref_node(struct btrfs_backref_cache *cache,
struct btrfs_backref_node *node)
{
@ -609,7 +588,7 @@ static int handle_direct_tree_backref(struct btrfs_backref_cache *cache,
rb_node = rb_simple_search(&cache->rb_root, ref_key->offset);
if (!rb_node) {
/* Parent node not yet cached */
upper = alloc_backref_node(cache, ref_key->offset,
upper = btrfs_backref_alloc_node(cache, ref_key->offset,
cur->level + 1);
if (!upper) {
free_backref_edge(cache, edge);
@ -729,8 +708,8 @@ static int handle_indirect_tree_backref(struct btrfs_backref_cache *cache,
eb = path->nodes[level];
rb_node = rb_simple_search(&cache->rb_root, eb->start);
if (!rb_node) {
upper = alloc_backref_node(cache, eb->start,
lower->level + 1);
upper = btrfs_backref_alloc_node(cache, eb->start,
lower->level + 1);
if (!upper) {
btrfs_put_root(root);
free_backref_edge(cache, edge);
@ -1135,7 +1114,7 @@ static noinline_for_stack struct btrfs_backref_node *build_backref_tree(
goto out;
}
node = alloc_backref_node(cache, bytenr, level);
node = btrfs_backref_alloc_node(cache, bytenr, level);
if (!node) {
err = -ENOMEM;
goto out;
@ -1272,7 +1251,8 @@ static int clone_backref_node(struct btrfs_trans_handle *trans,
if (!node)
return 0;
new_node = alloc_backref_node(cache, dest->node->start, node->level);
new_node = btrfs_backref_alloc_node(cache, dest->node->start,
node->level);
if (!new_node)
return -ENOMEM;