diff options
| -rw-r--r-- | fs/btrfs/ctree.h | 11 | ||||
| -rw-r--r-- | fs/btrfs/struct-funcs.c | 16 |
2 files changed, 19 insertions, 8 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index f7907b02fa7..030d21d7f98 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -557,14 +557,9 @@ static inline unsigned long btrfs_node_key_ptr_offset(int nr) sizeof(struct btrfs_key_ptr) * nr; } -static inline void btrfs_node_key(struct extent_buffer *eb, - struct btrfs_disk_key *disk_key, int nr) -{ - unsigned long ptr; - ptr = btrfs_node_key_ptr_offset(nr); - read_eb_member(eb, (struct btrfs_key_ptr *)ptr, - struct btrfs_key_ptr, key, disk_key); -} +void btrfs_node_key(struct extent_buffer *eb, + struct btrfs_disk_key *disk_key, int nr); + static inline void btrfs_set_node_key(struct extent_buffer *eb, struct btrfs_disk_key *disk_key, int nr) { diff --git a/fs/btrfs/struct-funcs.c b/fs/btrfs/struct-funcs.c index cf68fcf9b55..c5715a60554 100644 --- a/fs/btrfs/struct-funcs.c +++ b/fs/btrfs/struct-funcs.c @@ -95,3 +95,19 @@ void btrfs_set_##name(struct extent_buffer *eb, \ #include "ctree.h" +void btrfs_node_key(struct extent_buffer *eb, + struct btrfs_disk_key *disk_key, int nr) +{ + unsigned long ptr = btrfs_node_key_ptr_offset(nr); + if (eb->map_token && ptr >= eb->map_start && + ptr + sizeof(*disk_key) <= eb->map_start + eb->map_len) { + memcpy(disk_key, eb->kaddr + ptr - eb->map_start, + sizeof(*disk_key)); + return; + } else if (eb->map_token) { + unmap_extent_buffer(eb, eb->map_token, KM_USER1); + eb->map_token = NULL; + } + read_eb_member(eb, (struct btrfs_key_ptr *)ptr, + struct btrfs_key_ptr, key, disk_key); +} |