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| author | Chris Mason <chris.mason@oracle.com> | 2007-11-06 15:09:29 -0500 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2008-09-25 11:03:57 -0400 |
| commit | e644d021e328d3902559e5db687383f2da85993c (patch) | |
| tree | 12fa85275a3333c709ddc03c2f4fd426b97a9dcf | |
| parent | f84a8b362d9785ca1fa0598d8a90f35184bd8750 (diff) | |
| download | op-kernel-dev-e644d021e328d3902559e5db687383f2da85993c.zip op-kernel-dev-e644d021e328d3902559e5db687383f2da85993c.tar.gz | |
Fix recursive KM_USER1 usage in btrfs_realloc_node
Signed-off-by: Chris Mason <chris.mason@oracle.com>
| -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 f7907b0..030d21d 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 cf68fcf..c5715a6 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); +} |
