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authorNikolay Borisov <nborisov@suse.com>2019-08-27 13:46:28 +0200
committerDavid Sterba <dsterba@suse.com>2019-09-09 14:59:16 +0200
commit9bb8407f54f63242d822d6c57f4edb7d1ae2b901 (patch)
treed30e8c575c2f2504646cfd768cfd32745214ce9a /fs/btrfs
parentbtrfs: move dev_stats helpers to volumes.c (diff)
downloadlinux-9bb8407f54f63242d822d6c57f4edb7d1ae2b901.tar.xz
linux-9bb8407f54f63242d822d6c57f4edb7d1ae2b901.zip
btrfs: Make btrfs_find_name_in_backref return btrfs_inode_ref struct
btrfs_find_name_in_backref returns either 0/1 depending on whether it found a backref for the given name. If it returns true then the actual inode_ref struct is returned in one of its parameters. That's pointless, instead refactor the function such that it returns either a pointer to the btrfs_inode_ref or NULL it it didn't find anything. This streamlines the function calling convention. Signed-off-by: Nikolay Borisov <nborisov@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs')
-rw-r--r--fs/btrfs/ctree.h6
-rw-r--r--fs/btrfs/inode-item.c29
-rw-r--r--fs/btrfs/tree-log.c8
3 files changed, 21 insertions, 22 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index ba34f7b435a2..31ed47d195c2 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -2800,9 +2800,9 @@ btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
u64 inode_objectid, u64 ref_objectid, int ins_len,
int cow);
-int btrfs_find_name_in_backref(struct extent_buffer *leaf, int slot,
- const char *name,
- int name_len, struct btrfs_inode_ref **ref_ret);
+struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf,
+ int slot, const char *name,
+ int name_len);
int btrfs_find_name_in_ext_backref(struct extent_buffer *leaf, int slot,
u64 ref_objectid, const char *name,
int name_len,
diff --git a/fs/btrfs/inode-item.c b/fs/btrfs/inode-item.c
index 30d62ef918b9..e13cfdcc1cd1 100644
--- a/fs/btrfs/inode-item.c
+++ b/fs/btrfs/inode-item.c
@@ -8,9 +8,9 @@
#include "transaction.h"
#include "print-tree.h"
-int btrfs_find_name_in_backref(struct extent_buffer *leaf, int slot,
- const char *name,
- int name_len, struct btrfs_inode_ref **ref_ret)
+struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf,
+ int slot, const char *name,
+ int name_len)
{
struct btrfs_inode_ref *ref;
unsigned long ptr;
@@ -28,13 +28,10 @@ int btrfs_find_name_in_backref(struct extent_buffer *leaf, int slot,
cur_offset += len + sizeof(*ref);
if (len != name_len)
continue;
- if (memcmp_extent_buffer(leaf, name, name_ptr, name_len) == 0) {
- if (ref_ret)
- *ref_ret = ref;
- return 1;
- }
+ if (memcmp_extent_buffer(leaf, name, name_ptr, name_len) == 0)
+ return ref;
}
- return 0;
+ return NULL;
}
int btrfs_find_name_in_ext_backref(struct extent_buffer *leaf, int slot,
@@ -213,8 +210,10 @@ int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
} else if (ret < 0) {
goto out;
}
- if (!btrfs_find_name_in_backref(path->nodes[0], path->slots[0],
- name, name_len, &ref)) {
+
+ ref = btrfs_find_name_in_backref(path->nodes[0], path->slots[0], name,
+ name_len);
+ if (!ref) {
ret = -ENOENT;
search_ext_refs = 1;
goto out;
@@ -341,9 +340,9 @@ int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
ins_len);
if (ret == -EEXIST) {
u32 old_size;
-
- if (btrfs_find_name_in_backref(path->nodes[0], path->slots[0],
- name, name_len, &ref))
+ ref = btrfs_find_name_in_backref(path->nodes[0], path->slots[0],
+ name, name_len);
+ if (ref)
goto out;
old_size = btrfs_item_size_nr(path->nodes[0], path->slots[0]);
@@ -359,7 +358,7 @@ int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
if (ret == -EOVERFLOW) {
if (btrfs_find_name_in_backref(path->nodes[0],
path->slots[0],
- name, name_len, &ref))
+ name, name_len))
ret = -EEXIST;
else
ret = -EMLINK;
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index 34d087008b72..7a7ae33bea51 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -1271,8 +1271,8 @@ again:
parent_id, name,
namelen, NULL);
else
- ret = btrfs_find_name_in_backref(log_eb, log_slot, name,
- namelen, NULL);
+ ret = !!btrfs_find_name_in_backref(log_eb, log_slot,
+ name, namelen);
if (!ret) {
struct inode *dir;
@@ -1338,8 +1338,8 @@ static int btrfs_inode_ref_exists(struct inode *inode, struct inode *dir,
path->slots[0], parent_id,
name, namelen, NULL);
else
- ret = btrfs_find_name_in_backref(path->nodes[0], path->slots[0],
- name, namelen, NULL);
+ ret = !!btrfs_find_name_in_backref(path->nodes[0], path->slots[0],
+ name, namelen);
out:
btrfs_free_path(path);