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Commit 73e82fe4 authored by David Sterba's avatar David Sterba
Browse files

btrfs: assert tree mod log lock in __tree_mod_log_insert 



The tree is going to be modified so it must be the exclusive lock.

Reviewed-by: default avatarNikolay Borisov <nborisov@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent d23ea3fa

fs/btrfs/ctree.c

+2 −2
Original line number Diff line number Diff line
@@ -376,8 +376,6 @@ void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info, 
 * The 'start address' is the logical address of the *new* root node

 * for root replace operations, or the logical address of the affected

 * block for all other operations.

 *

 * Note: must be called with write lock for fs_info::tree_mod_log_lock.

 */

static noinline int

__tree_mod_log_insert(struct btrfs_fs_info *fs_info, struct tree_mod_elem *tm)
@@ -387,6 +385,8 @@ __tree_mod_log_insert(struct btrfs_fs_info *fs_info, struct tree_mod_elem *tm) 
	struct rb_node *parent = NULL;

	struct tree_mod_elem *cur;



	lockdep_assert_held_write(&fs_info->tree_mod_log_lock);



	tm->seq = btrfs_inc_tree_mod_seq(fs_info);



	tm_root = &fs_info->tree_mod_log;