From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from relay.sgi.com (relay1.corp.sgi.com [137.38.102.111]) by oss.sgi.com (Postfix) with ESMTP id 74C527F37 for ; Mon, 9 Nov 2015 14:21:19 -0600 (CST) Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by relay1.corp.sgi.com (Postfix) with ESMTP id 4822B8F8040 for ; Mon, 9 Nov 2015 12:21:19 -0800 (PST) Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by cuda.sgi.com with ESMTP id RQg98rSCq7mAIp4K (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO) for ; Mon, 09 Nov 2015 12:21:18 -0800 (PST) Received: from int-mx09.intmail.prod.int.phx2.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22]) by mx1.redhat.com (Postfix) with ESMTPS id 94D4F42E5BF for ; Mon, 9 Nov 2015 20:21:17 +0000 (UTC) Received: from bfoster.bfoster (dhcp-41-67.bos.redhat.com [10.18.41.67]) by int-mx09.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id tA9KLHJt014074 for ; Mon, 9 Nov 2015 15:21:17 -0500 From: Brian Foster Subject: [PATCH 4/8] xfs: return start block of first bad log record during recovery Date: Mon, 9 Nov 2015 15:21:11 -0500 Message-Id: <1447100475-33465-5-git-send-email-bfoster@redhat.com> In-Reply-To: <1447100475-33465-1-git-send-email-bfoster@redhat.com> References: <1447100475-33465-1-git-send-email-bfoster@redhat.com> List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: xfs-bounces@oss.sgi.com Sender: xfs-bounces@oss.sgi.com To: xfs@oss.sgi.com Each log recovery pass walks from the tail block to the head block and processes records appropriately based on the associated log pass type. There are various failure conditions that can occur through this sequence, such as I/O errors, CRC errors, etc. Log torn write detection will perform CRC verification near the head of the log to detect torn writes and trim torn records from the log appropriately. As it is, xlog_do_recovery_pass() only returns an error code in the event of CRC failure, which isn't enough information to trim the head of the log. Update xlog_do_recovery_pass() to optionally return the start block of the associated record when an error occurs. This patch contains no functional changes. Signed-off-by: Brian Foster --- fs/xfs/xfs_log_recover.c | 19 +++++++++++++++---- 1 file changed, 15 insertions(+), 4 deletions(-) diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c index c2bf307..2ef0880 100644 --- a/fs/xfs/xfs_log_recover.c +++ b/fs/xfs/xfs_log_recover.c @@ -4239,10 +4239,12 @@ xlog_do_recovery_pass( struct xlog *log, xfs_daddr_t head_blk, xfs_daddr_t tail_blk, - int pass) + int pass, + xfs_daddr_t *first_bad) /* out: first bad log rec */ { xlog_rec_header_t *rhead; xfs_daddr_t blk_no; + xfs_daddr_t rhead_blk; char *offset; xfs_buf_t *hbp, *dbp; int error = 0, h_size, h_len; @@ -4251,6 +4253,7 @@ xlog_do_recovery_pass( struct hlist_head rhash[XLOG_RHASH_SIZE]; ASSERT(head_blk != tail_blk); + rhead_blk = 0; /* * Read the header of the tail block and get the iclog buffer size from @@ -4325,7 +4328,7 @@ xlog_do_recovery_pass( } memset(rhash, 0, sizeof(rhash)); - blk_no = tail_blk; + blk_no = rhead_blk = tail_blk; if (tail_blk > head_blk) { /* * Perform recovery around the end of the physical log. @@ -4436,7 +4439,9 @@ xlog_do_recovery_pass( pass); if (error) goto bread_err2; + blk_no += bblks; + rhead_blk = blk_no; } ASSERT(blk_no >= log->l_logBBsize); @@ -4464,13 +4469,19 @@ xlog_do_recovery_pass( error = xlog_recover_process(log, rhash, rhead, offset, pass); if (error) goto bread_err2; + blk_no += bblks + hblks; + rhead_blk = blk_no; } bread_err2: xlog_put_bp(dbp); bread_err1: xlog_put_bp(hbp); + + if (error && first_bad) + *first_bad = rhead_blk; + return error; } @@ -4508,7 +4519,7 @@ xlog_do_log_recovery( INIT_LIST_HEAD(&log->l_buf_cancel_table[i]); error = xlog_do_recovery_pass(log, head_blk, tail_blk, - XLOG_RECOVER_PASS1); + XLOG_RECOVER_PASS1, NULL); if (error != 0) { kmem_free(log->l_buf_cancel_table); log->l_buf_cancel_table = NULL; @@ -4519,7 +4530,7 @@ xlog_do_log_recovery( * When it is complete free the table of buf cancel items. */ error = xlog_do_recovery_pass(log, head_blk, tail_blk, - XLOG_RECOVER_PASS2); + XLOG_RECOVER_PASS2, NULL); #ifdef DEBUG if (!error) { int i; -- 2.1.0 _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs