From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from aserp2120.oracle.com ([141.146.126.78]:41050 "EHLO aserp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757161AbdLWBOR (ORCPT ); Fri, 22 Dec 2017 20:14:17 -0500 Subject: [PATCH 08/20] xfs: verify dinode header first From: "Darrick J. Wong" Date: Fri, 22 Dec 2017 17:07:54 -0800 Message-ID: <151399127486.23543.4157032277601027971.stgit@magnolia> In-Reply-To: <151399122361.23543.15718507168231759645.stgit@magnolia> References: <151399122361.23543.15718507168231759645.stgit@magnolia> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-xfs-owner@vger.kernel.org List-ID: List-Id: xfs To: darrick.wong@oracle.com Cc: linux-xfs@vger.kernel.org, Dave Chinner From: Darrick J. Wong Move the v3 inode integrity information (crc, owner, metauuid) before we look at anything else in the inode so that we don't waste time on a torn write or a totally garbled block. This makes xfs_dinode_verify more consistent with the other verifiers. Signed-off-by: Darrick J. Wong Reviewed-by: Dave Chinner --- fs/xfs/libxfs/xfs_inode_buf.c | 23 +++++++++++++---------- 1 file changed, 13 insertions(+), 10 deletions(-) diff --git a/fs/xfs/libxfs/xfs_inode_buf.c b/fs/xfs/libxfs/xfs_inode_buf.c index a43a370..a1ba112 100644 --- a/fs/xfs/libxfs/xfs_inode_buf.c +++ b/fs/xfs/libxfs/xfs_inode_buf.c @@ -393,6 +393,19 @@ xfs_dinode_verify( if (dip->di_magic != cpu_to_be16(XFS_DINODE_MAGIC)) return __this_address; + /* Verify v3 integrity information first */ + if (dip->di_version >= 3) { + if (!xfs_sb_version_hascrc(&mp->m_sb)) + return __this_address; + if (!xfs_verify_cksum((char *)dip, mp->m_sb.sb_inodesize, + XFS_DINODE_CRC_OFF)) + return __this_address; + if (be64_to_cpu(dip->di_ino) != ino) + return __this_address; + if (!uuid_equal(&dip->di_uuid, &mp->m_sb.sb_meta_uuid)) + return __this_address; + } + /* don't allow invalid i_size */ if (be64_to_cpu(dip->di_size) & (1ULL << 63)) return __this_address; @@ -409,16 +422,6 @@ xfs_dinode_verify( if (dip->di_version < 3) return NULL; - if (!xfs_sb_version_hascrc(&mp->m_sb)) - return __this_address; - if (!xfs_verify_cksum((char *)dip, mp->m_sb.sb_inodesize, - XFS_DINODE_CRC_OFF)) - return __this_address; - if (be64_to_cpu(dip->di_ino) != ino) - return __this_address; - if (!uuid_equal(&dip->di_uuid, &mp->m_sb.sb_meta_uuid)) - return __this_address; - flags = be16_to_cpu(dip->di_flags); flags2 = be64_to_cpu(dip->di_flags2);