Btrfs: Replace the big fs_mutex with a collection of other locks
Extent alloctions are still protected by a large alloc_mutex.
Objectid allocations are covered by a objectid mutex
Other btree operations are protected by a lock on individual btree nodes
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/xattr.c b/fs/btrfs/xattr.c
index f63488d..3e9eb91 100644
--- a/fs/btrfs/xattr.c
+++ b/fs/btrfs/xattr.c
@@ -153,7 +153,6 @@
return -ENOMEM;
}
- mutex_lock(&root->fs_info->fs_mutex);
/* lookup the xattr by name */
di = btrfs_lookup_xattr(NULL, root, path, inode->i_ino, name,
strlen(name), 0);
@@ -181,7 +180,6 @@
ret = btrfs_dir_data_len(leaf, di);
out:
- mutex_unlock(&root->fs_info->fs_mutex);
kfree(name);
btrfs_free_path(path);
return ret;
@@ -210,7 +208,6 @@
return -ENOMEM;
}
- mutex_lock(&root->fs_info->fs_mutex);
trans = btrfs_start_transaction(root, 1);
btrfs_set_trans_block_group(trans, inode);
@@ -260,7 +257,6 @@
}
btrfs_end_transaction(trans, root);
- mutex_unlock(&root->fs_info->fs_mutex);
kfree(name);
btrfs_free_path(path);
@@ -297,8 +293,6 @@
return -ENOMEM;
path->reada = 2;
- mutex_lock(&root->fs_info->fs_mutex);
-
/* search for our xattrs */
ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
if (ret < 0)
@@ -379,15 +373,13 @@
ret = total_size;
err:
- mutex_unlock(&root->fs_info->fs_mutex);
btrfs_free_path(path);
return ret;
}
/*
- * delete all the xattrs associated with the inode. fs_mutex should be
- * held when we come into here
+ * delete all the xattrs associated with the inode.
*/
int btrfs_delete_xattrs(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct inode *inode)