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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>
This commit is contained in:
Josef Bacik 2012-12-12 17:00:01 -05:00 committed by Chris Mason
parent b11e234d21
commit d6393786cd
2 changed files with 6 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
fs/btrfs/ctree.c
View File

@ -2212,6 +2212,9 @@ static noinline void unlock_up(struct btrfs_path *path, int level,
int no_skips = 0; int no_skips = 0;
struct extent_buffer *t; struct extent_buffer *t;
if (path->really_keep_locks)
return;
for (i = level; i < BTRFS_MAX_LEVEL; i++) { for (i = level; i < BTRFS_MAX_LEVEL; i++) {
if (!path->nodes[i]) if (!path->nodes[i])
break; break;
@ -2259,7 +2262,7 @@ noinline void btrfs_unlock_up_safe(struct btrfs_path *path, int level)
{ {
int i; int i;
if (path->keep_locks) if (path->keep_locks || path->really_keep_locks)
return; return;
for (i = level; i < BTRFS_MAX_LEVEL; i++) { 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) if (!cow)
write_lock_level = -1; 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; write_lock_level = BTRFS_MAX_LEVEL;
min_write_lock_level = write_lock_level; min_write_lock_level = write_lock_level;

1
fs/btrfs/ctree.h
View File

@ -576,6 +576,7 @@ struct btrfs_path {
unsigned int skip_locking:1; unsigned int skip_locking:1;
unsigned int leave_spinning:1; unsigned int leave_spinning:1;
unsigned int search_commit_root:1; unsigned int search_commit_root:1;
unsigned int really_keep_locks:1;
}; };
/* /*