{
struct btrfs_fs_info *fs_info = trans->fs_info;
- trans->aborted = errno;
+ WRITE_ONCE(trans->aborted, errno);
/* Nothing used. The other threads that have joined this
* transaction may be able to continue. */
if (!trans->dirty && list_empty(&trans->new_bgs)) {
break;
#endif
case Opt_err:
- btrfs_info(info, "unrecognized mount option '%s'", p);
+ btrfs_err(info, "unrecognized mount option '%s'", p);
ret = -EINVAL;
goto out;
default:
return error;
}
-static char *get_subvol_name_from_objectid(struct btrfs_fs_info *fs_info,
- u64 subvol_objectid)
+char *btrfs_get_subvol_name_from_objectid(struct btrfs_fs_info *fs_info,
+ u64 subvol_objectid)
{
struct btrfs_root *root = fs_info->tree_root;
- struct btrfs_root *fs_root;
+ struct btrfs_root *fs_root = NULL;
struct btrfs_root_ref *root_ref;
struct btrfs_inode_ref *inode_ref;
struct btrfs_key key;
key.objectid = subvol_objectid;
key.type = BTRFS_ROOT_ITEM_KEY;
key.offset = (u64)-1;
- fs_root = btrfs_read_fs_root_no_name(fs_info, &key);
+ fs_root = btrfs_get_fs_root(fs_info, &key, true);
if (IS_ERR(fs_root)) {
ret = PTR_ERR(fs_root);
+ fs_root = NULL;
goto err;
}
ptr[0] = '/';
btrfs_release_path(path);
}
+ btrfs_put_root(fs_root);
+ fs_root = NULL;
}
btrfs_free_path(path);
return name;
err:
+ btrfs_put_root(fs_root);
btrfs_free_path(path);
kfree(name);
return ERR_PTR(ret);
goto out;
}
}
- subvol_name = get_subvol_name_from_objectid(btrfs_sb(mnt->mnt_sb),
- subvol_objectid);
+ subvol_name = btrfs_get_subvol_name_from_objectid(
+ btrfs_sb(mnt->mnt_sb), subvol_objectid);
if (IS_ERR(subvol_name)) {
root = ERR_CAST(subvol_name);
subvol_name = NULL;
/*
* Setup a dummy root and fs_info for test/set super. This is because
* we don't actually fill this stuff out until open_ctree, but we need
- * it for searching for existing supers, so this lets us do that and
- * then open_ctree will properly initialize everything later.
+ * then open_ctree will properly initialize the file system specific
+ * settings later. btrfs_init_fs_info initializes the static elements
+ * of the fs_info (locks and such) to make cleanup easier if we find a
+ * superblock with our given fs_devices later on at sget() time.
*/
fs_info = kvzalloc(sizeof(struct btrfs_fs_info), GFP_KERNEL);
if (!fs_info) {
error = -ENOMEM;
goto error_sec_opts;
}
+ btrfs_init_fs_info(fs_info);
fs_info->super_copy = kzalloc(BTRFS_SUPER_INFO_SIZE, GFP_KERNEL);
fs_info->super_for_commit = kzalloc(BTRFS_SUPER_INFO_SIZE, GFP_KERNEL);
if (s->s_root) {
btrfs_close_devices(fs_devices);
- free_fs_info(fs_info);
+ btrfs_free_fs_info(fs_info);
if ((flags ^ s->s_flags) & SB_RDONLY)
error = -EBUSY;
} else {
error_close_devices:
btrfs_close_devices(fs_devices);
error_fs_info:
- free_fs_info(fs_info);
+ btrfs_free_fs_info(fs_info);
error_sec_opts:
security_free_mnt_opts(&new_sec_opts);
return ERR_PTR(error);
{
struct btrfs_fs_info *fs_info = btrfs_sb(sb);
kill_anon_super(sb);
- free_fs_info(fs_info);
+ btrfs_free_fs_info(fs_info);
}
static struct file_system_type btrfs_fs_type = {
}
/*
- * used by btrfsctl to scan devices when no FS is mounted
+ * Used by /dev/btrfs-control for devices ioctls.
*/
static long btrfs_control_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)