From patchwork Tue Aug 9 07:11:13 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tsutomu Itoh X-Patchwork-Id: 1047642 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter1.kernel.org (8.14.4/8.14.4) with ESMTP id p797CaC6023122 for ; Tue, 9 Aug 2011 07:12:36 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752028Ab1HIHMd (ORCPT ); Tue, 9 Aug 2011 03:12:33 -0400 Received: from fgwmail5.fujitsu.co.jp ([192.51.44.35]:36839 "EHLO fgwmail5.fujitsu.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751708Ab1HIHMd (ORCPT ); Tue, 9 Aug 2011 03:12:33 -0400 Received: from m1.gw.fujitsu.co.jp (unknown [10.0.50.71]) by fgwmail5.fujitsu.co.jp (Postfix) with ESMTP id 0B1C73EE0C2 for ; Tue, 9 Aug 2011 16:12:31 +0900 (JST) Received: from smail (m1 [127.0.0.1]) by outgoing.m1.gw.fujitsu.co.jp (Postfix) with ESMTP id E85AD45DE54 for ; Tue, 9 Aug 2011 16:12:30 +0900 (JST) Received: from s1.gw.fujitsu.co.jp (s1.gw.fujitsu.co.jp [10.0.50.91]) by m1.gw.fujitsu.co.jp (Postfix) with ESMTP id C8C5945DE55 for ; Tue, 9 Aug 2011 16:12:30 +0900 (JST) Received: from s1.gw.fujitsu.co.jp (localhost.localdomain [127.0.0.1]) by s1.gw.fujitsu.co.jp (Postfix) with ESMTP id BD6591DB8042 for ; Tue, 9 Aug 2011 16:12:30 +0900 (JST) Received: from m106.s.css.fujitsu.com (m106.s.css.fujitsu.com [10.240.81.146]) by s1.gw.fujitsu.co.jp (Postfix) with ESMTP id 8B19D1DB804C for ; Tue, 9 Aug 2011 16:12:30 +0900 (JST) Received: from m106.css.fujitsu.com (m106 [127.0.0.1]) by m106.s.css.fujitsu.com (Postfix) with ESMTP id 5E173A1000C; Tue, 9 Aug 2011 16:12:30 +0900 (JST) Received: from T-ITOH1.jp.fujitsu.com (unknown [10.124.101.84]) by m106.s.css.fujitsu.com (Postfix) with SMTP id F06465B918D; Tue, 9 Aug 2011 16:12:29 +0900 (JST) X-SecurityPolicyCheck-FJ: OK by FujitsuOutboundMailChecker v1.4.0 Received: from T-ITOH1[10.124.101.84] by T-ITOH1 (FujitsuOutboundMailChecker v1.4.0/9992[10.124.101.84]); Tue, 09 Aug 2011 16:11:57 +0900 (JST) Message-Id: <201108090711.AA00032@T-ITOH1.jp.fujitsu.com> From: Tsutomu Itoh Date: Tue, 09 Aug 2011 16:11:13 +0900 To: linux-btrfs@vger.kernel.org Cc: chris.mason@oracle.com Subject: [PATCH] Btrfs: forced readonly when btrfs_drop_snapshot() fails MIME-Version: 1.0 X-Mailer: AL-Mail32 Version 1.13 Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter1.kernel.org [140.211.167.41]); Tue, 09 Aug 2011 07:12:36 +0000 (UTC) The filesystem turns readonly instead of returning the error to the caller when detected error in btrfs_drop_snapshot(). and, because the caller doesn't check the error, the function type is changed to 'void'. Signed-off-by: Tsutomu Itoh --- fs/btrfs/ctree.h | 4 ++-- fs/btrfs/extent-tree.c | 22 ++++++++++++++-------- 2 files changed, 16 insertions(+), 10 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index a6263bd..8842936 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -2367,8 +2367,8 @@ static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf); -int btrfs_drop_snapshot(struct btrfs_root *root, - struct btrfs_block_rsv *block_rsv, int update_ref); +void btrfs_drop_snapshot(struct btrfs_root *root, + struct btrfs_block_rsv *block_rsv, int update_ref); int btrfs_drop_subtree(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct extent_buffer *node, diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 66bac22..7f2aec6 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -6269,8 +6269,8 @@ static noinline int walk_up_tree(struct btrfs_trans_handle *trans, * also make sure backrefs for the shared block and all lower level * blocks are properly updated. */ -int btrfs_drop_snapshot(struct btrfs_root *root, - struct btrfs_block_rsv *block_rsv, int update_ref) +void btrfs_drop_snapshot(struct btrfs_root *root, + struct btrfs_block_rsv *block_rsv, int update_ref) { struct btrfs_path *path; struct btrfs_trans_handle *trans; @@ -6283,13 +6283,16 @@ int btrfs_drop_snapshot(struct btrfs_root *root, int level; path = btrfs_alloc_path(); - if (!path) - return -ENOMEM; + if (!path) { + err = -ENOMEM; + goto out; + } wc = kzalloc(sizeof(*wc), GFP_NOFS); if (!wc) { btrfs_free_path(path); - return -ENOMEM; + err = -ENOMEM; + goto out; } trans = btrfs_start_transaction(tree_root, 0); @@ -6318,7 +6321,7 @@ int btrfs_drop_snapshot(struct btrfs_root *root, path->lowest_level = 0; if (ret < 0) { err = ret; - goto out; + goto out_free; } WARN_ON(ret > 0); @@ -6425,11 +6428,14 @@ int btrfs_drop_snapshot(struct btrfs_root *root, free_extent_buffer(root->commit_root); kfree(root); } -out: +out_free: btrfs_end_transaction_throttle(trans, tree_root); kfree(wc); btrfs_free_path(path); - return err; +out: + if (err) + btrfs_std_error(root->fs_info, err); + return; } /*