summaryrefslogtreecommitdiffstats
path: root/fs
diff options
context:
space:
mode:
authorJosef Bacik <jbacik@fusionio.com>2012-12-12 23:00:01 +0100
committerChris Mason <chris.mason@fusionio.com>2012-12-17 02:46:24 +0100
commitd6393786cd40f67709324bc4f08d7e4b911153fe (patch)
tree86bca8caad1c33955f4bf6f4564d8a144fa88f78 /fs
parentBtrfs: do not mark ems as prealloc if we are writing to them (diff)
downloadlinux-d6393786cd40f67709324bc4f08d7e4b911153fe.tar.xz
linux-d6393786cd40f67709324bc4f08d7e4b911153fe.zip
Btrfs: add path->really_keep_locks
You'd think path->keep_locks would keep all the locks wouldn't you? You'd be wrong. It only keeps them if the slot is pointing to the last item in the node. This is for use with btrfs_next_leaf, which needs this sort of thing. But the horrible horrible things I'm going to do to the tree log means I really need everything held from root to leaf so I can add and delete items in the same search. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/btrfs/ctree.c7
-rw-r--r--fs/btrfs/ctree.h1
2 files changed, 6 insertions, 2 deletions
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 01efcbc80dfb..0c5c28ff794f 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -2212,6 +2212,9 @@ static noinline void unlock_up(struct btrfs_path *path, int level,
int no_skips = 0;
struct extent_buffer *t;
+ if (path->really_keep_locks)
+ return;
+
for (i = level; i < BTRFS_MAX_LEVEL; i++) {
if (!path->nodes[i])
break;
@@ -2259,7 +2262,7 @@ noinline void btrfs_unlock_up_safe(struct btrfs_path *path, int level)
{
int i;
- if (path->keep_locks)
+ if (path->keep_locks || path->really_keep_locks)
return;
for (i = level; i < BTRFS_MAX_LEVEL; i++) {
@@ -2492,7 +2495,7 @@ int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
if (!cow)
write_lock_level = -1;
- if (cow && (p->keep_locks || p->lowest_level))
+ if (cow && (p->really_keep_locks || p->keep_locks || p->lowest_level))
write_lock_level = BTRFS_MAX_LEVEL;
min_write_lock_level = write_lock_level;
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 313a6adfde55..9ed452f5d062 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -576,6 +576,7 @@ struct btrfs_path {
unsigned int skip_locking:1;
unsigned int leave_spinning:1;
unsigned int search_commit_root:1;
+ unsigned int really_keep_locks:1;
};
/*