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authorChris Mason <chris.mason@oracle.com>2007-11-06 15:09:29 -0500
committerChris Mason <chris.mason@oracle.com>2008-09-25 11:03:57 -0400
commite644d021e328d3902559e5db687383f2da85993c (patch)
tree12fa85275a3333c709ddc03c2f4fd426b97a9dcf /fs/btrfs/struct-funcs.c
parentf84a8b362d9785ca1fa0598d8a90f35184bd8750 (diff)
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Fix recursive KM_USER1 usage in btrfs_realloc_node
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/struct-funcs.c')
-rw-r--r--fs/btrfs/struct-funcs.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/fs/btrfs/struct-funcs.c b/fs/btrfs/struct-funcs.c
index cf68fcf9b552..c5715a60554c 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);
+}