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xfs: create helpers to scrub a metadata btree
Create helper functions and tracepoints to deal with errors while scrubbing a metadata btree. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Dave Chinner <dchinner@redhat.com>
This commit is contained in:
Darrick J. Wong
parent
4700d22980
commit
537964bceb
@ -143,6 +143,7 @@ ifeq ($(CONFIG_XFS_ONLINE_SCRUB),y)
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xfs-y += $(addprefix scrub/, \
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trace.o \
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btree.o \
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common.o \
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scrub.o \
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)
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114
fs/xfs/scrub/btree.c
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114
fs/xfs/scrub/btree.c
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@ -0,0 +1,114 @@
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/*
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* Copyright (C) 2017 Oracle. All Rights Reserved.
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*
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* Author: Darrick J. Wong <darrick.wong@oracle.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "xfs.h"
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#include "xfs_fs.h"
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#include "xfs_shared.h"
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#include "xfs_format.h"
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#include "xfs_trans_resv.h"
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#include "xfs_mount.h"
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#include "xfs_defer.h"
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#include "xfs_btree.h"
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#include "xfs_bit.h"
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#include "xfs_log_format.h"
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#include "xfs_trans.h"
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#include "xfs_sb.h"
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#include "xfs_inode.h"
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#include "xfs_alloc.h"
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#include "scrub/scrub.h"
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#include "scrub/common.h"
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#include "scrub/btree.h"
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#include "scrub/trace.h"
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/* btree scrubbing */
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/*
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* Check for btree operation errors. See the section about handling
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* operational errors in common.c.
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*/
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bool
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xfs_scrub_btree_process_error(
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struct xfs_scrub_context *sc,
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struct xfs_btree_cur *cur,
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int level,
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int *error)
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{
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if (*error == 0)
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return true;
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switch (*error) {
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case -EDEADLOCK:
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/* Used to restart an op with deadlock avoidance. */
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trace_xfs_scrub_deadlock_retry(sc->ip, sc->sm, *error);
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break;
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case -EFSBADCRC:
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case -EFSCORRUPTED:
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/* Note the badness but don't abort. */
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sc->sm->sm_flags |= XFS_SCRUB_OFLAG_CORRUPT;
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*error = 0;
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/* fall through */
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default:
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if (cur->bc_flags & XFS_BTREE_ROOT_IN_INODE)
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trace_xfs_scrub_ifork_btree_op_error(sc, cur, level,
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*error, __return_address);
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else
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trace_xfs_scrub_btree_op_error(sc, cur, level,
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*error, __return_address);
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break;
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}
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return false;
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}
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/* Record btree block corruption. */
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void
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xfs_scrub_btree_set_corrupt(
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struct xfs_scrub_context *sc,
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struct xfs_btree_cur *cur,
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int level)
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{
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sc->sm->sm_flags |= XFS_SCRUB_OFLAG_CORRUPT;
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if (cur->bc_flags & XFS_BTREE_ROOT_IN_INODE)
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trace_xfs_scrub_ifork_btree_error(sc, cur, level,
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__return_address);
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else
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trace_xfs_scrub_btree_error(sc, cur, level,
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__return_address);
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}
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/*
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* Visit all nodes and leaves of a btree. Check that all pointers and
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* records are in order, that the keys reflect the records, and use a callback
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* so that the caller can verify individual records. The callback is the same
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* as the one for xfs_btree_query_range, so therefore this function also
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* returns XFS_BTREE_QUERY_RANGE_ABORT, zero, or a negative error code.
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*/
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int
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xfs_scrub_btree(
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struct xfs_scrub_context *sc,
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struct xfs_btree_cur *cur,
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xfs_scrub_btree_rec_fn scrub_fn,
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struct xfs_owner_info *oinfo,
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void *private)
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{
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int error = -EOPNOTSUPP;
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xfs_scrub_btree_process_error(sc, cur, 0, &error);
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return error;
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}
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57
fs/xfs/scrub/btree.h
Normal file
57
fs/xfs/scrub/btree.h
Normal file
@ -0,0 +1,57 @@
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/*
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* Copyright (C) 2017 Oracle. All Rights Reserved.
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*
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* Author: Darrick J. Wong <darrick.wong@oracle.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef __XFS_SCRUB_BTREE_H__
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#define __XFS_SCRUB_BTREE_H__
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/* btree scrub */
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/* Check for btree operation errors. */
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bool xfs_scrub_btree_process_error(struct xfs_scrub_context *sc,
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struct xfs_btree_cur *cur, int level, int *error);
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/* Check for btree corruption. */
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void xfs_scrub_btree_set_corrupt(struct xfs_scrub_context *sc,
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struct xfs_btree_cur *cur, int level);
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struct xfs_scrub_btree;
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typedef int (*xfs_scrub_btree_rec_fn)(
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struct xfs_scrub_btree *bs,
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union xfs_btree_rec *rec);
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struct xfs_scrub_btree {
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/* caller-provided scrub state */
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struct xfs_scrub_context *sc;
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struct xfs_btree_cur *cur;
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xfs_scrub_btree_rec_fn scrub_rec;
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struct xfs_owner_info *oinfo;
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void *private;
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/* internal scrub state */
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union xfs_btree_rec lastrec;
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bool firstrec;
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union xfs_btree_key lastkey[XFS_BTREE_MAXLEVELS];
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bool firstkey[XFS_BTREE_MAXLEVELS];
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struct list_head to_check;
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};
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int xfs_scrub_btree(struct xfs_scrub_context *sc, struct xfs_btree_cur *cur,
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xfs_scrub_btree_rec_fn scrub_fn,
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struct xfs_owner_info *oinfo, void *private);
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#endif /* __XFS_SCRUB_BTREE_H__ */
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@ -30,10 +30,27 @@
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#include "xfs_inode.h"
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#include "xfs_btree.h"
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#include "xfs_trans.h"
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#include "xfs_bit.h"
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#include "scrub/xfs_scrub.h"
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#include "scrub/scrub.h"
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#include "scrub/common.h"
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/* Figure out which block the btree cursor was pointing to. */
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static inline xfs_fsblock_t
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xfs_scrub_btree_cur_fsbno(
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struct xfs_btree_cur *cur,
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int level)
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{
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if (level < cur->bc_nlevels && cur->bc_bufs[level])
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return XFS_DADDR_TO_FSB(cur->bc_mp, cur->bc_bufs[level]->b_bn);
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else if (level == cur->bc_nlevels - 1 &&
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cur->bc_flags & XFS_BTREE_LONG_PTRS)
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return XFS_INO_TO_FSB(cur->bc_mp, cur->bc_private.b.ip->i_ino);
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else if (!(cur->bc_flags & XFS_BTREE_LONG_PTRS))
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return XFS_AGB_TO_FSB(cur->bc_mp, cur->bc_private.a.agno, 0);
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return NULLFSBLOCK;
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}
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/*
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* We include this last to have the helpers above available for the trace
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* event implementations.
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@ -283,6 +283,169 @@ TRACE_EVENT(xfs_scrub_incomplete,
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__entry->ret_ip)
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);
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TRACE_EVENT(xfs_scrub_btree_op_error,
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TP_PROTO(struct xfs_scrub_context *sc, struct xfs_btree_cur *cur,
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int level, int error, void *ret_ip),
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TP_ARGS(sc, cur, level, error, ret_ip),
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TP_STRUCT__entry(
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__field(dev_t, dev)
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__field(unsigned int, type)
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__field(xfs_btnum_t, btnum)
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__field(int, level)
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__field(xfs_agnumber_t, agno)
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__field(xfs_agblock_t, bno)
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__field(int, ptr);
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__field(int, error)
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__field(void *, ret_ip)
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),
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TP_fast_assign(
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xfs_fsblock_t fsbno = xfs_scrub_btree_cur_fsbno(cur, level);
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__entry->dev = sc->mp->m_super->s_dev;
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__entry->type = sc->sm->sm_type;
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__entry->btnum = cur->bc_btnum;
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__entry->level = level;
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__entry->agno = XFS_FSB_TO_AGNO(cur->bc_mp, fsbno);
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__entry->bno = XFS_FSB_TO_AGBNO(cur->bc_mp, fsbno);
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__entry->ptr = cur->bc_ptrs[level];
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__entry->error = error;
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__entry->ret_ip = ret_ip;
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),
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TP_printk("dev %d:%d type %u btnum %d level %d ptr %d agno %u agbno %u error %d ret_ip %pF",
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MAJOR(__entry->dev), MINOR(__entry->dev),
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__entry->type,
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__entry->btnum,
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__entry->level,
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__entry->ptr,
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__entry->agno,
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__entry->bno,
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__entry->error,
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__entry->ret_ip)
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);
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TRACE_EVENT(xfs_scrub_ifork_btree_op_error,
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TP_PROTO(struct xfs_scrub_context *sc, struct xfs_btree_cur *cur,
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int level, int error, void *ret_ip),
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TP_ARGS(sc, cur, level, error, ret_ip),
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TP_STRUCT__entry(
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__field(dev_t, dev)
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__field(xfs_ino_t, ino)
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__field(int, whichfork)
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__field(unsigned int, type)
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__field(xfs_btnum_t, btnum)
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__field(int, level)
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__field(int, ptr)
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__field(xfs_agnumber_t, agno)
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__field(xfs_agblock_t, bno)
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__field(int, error)
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__field(void *, ret_ip)
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),
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TP_fast_assign(
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xfs_fsblock_t fsbno = xfs_scrub_btree_cur_fsbno(cur, level);
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__entry->dev = sc->mp->m_super->s_dev;
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__entry->ino = sc->ip->i_ino;
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__entry->whichfork = cur->bc_private.b.whichfork;
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__entry->type = sc->sm->sm_type;
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__entry->btnum = cur->bc_btnum;
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__entry->level = level;
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__entry->ptr = cur->bc_ptrs[level];
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__entry->agno = XFS_FSB_TO_AGNO(cur->bc_mp, fsbno);
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__entry->bno = XFS_FSB_TO_AGBNO(cur->bc_mp, fsbno);
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__entry->error = error;
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__entry->ret_ip = ret_ip;
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),
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TP_printk("dev %d:%d ino %llu fork %d type %u btnum %d level %d ptr %d agno %u agbno %u error %d ret_ip %pF",
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MAJOR(__entry->dev), MINOR(__entry->dev),
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__entry->ino,
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__entry->whichfork,
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__entry->type,
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__entry->btnum,
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__entry->level,
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__entry->ptr,
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__entry->agno,
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__entry->bno,
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__entry->error,
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__entry->ret_ip)
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);
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TRACE_EVENT(xfs_scrub_btree_error,
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TP_PROTO(struct xfs_scrub_context *sc, struct xfs_btree_cur *cur,
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int level, void *ret_ip),
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TP_ARGS(sc, cur, level, ret_ip),
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TP_STRUCT__entry(
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__field(dev_t, dev)
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__field(unsigned int, type)
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__field(xfs_btnum_t, btnum)
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__field(int, level)
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__field(xfs_agnumber_t, agno)
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__field(xfs_agblock_t, bno)
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__field(int, ptr);
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__field(void *, ret_ip)
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),
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TP_fast_assign(
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xfs_fsblock_t fsbno = xfs_scrub_btree_cur_fsbno(cur, level);
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__entry->dev = sc->mp->m_super->s_dev;
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__entry->type = sc->sm->sm_type;
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__entry->btnum = cur->bc_btnum;
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__entry->level = level;
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__entry->agno = XFS_FSB_TO_AGNO(cur->bc_mp, fsbno);
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__entry->bno = XFS_FSB_TO_AGBNO(cur->bc_mp, fsbno);
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__entry->ptr = cur->bc_ptrs[level];
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__entry->ret_ip = ret_ip;
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),
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TP_printk("dev %d:%d type %u btnum %d level %d ptr %d agno %u agbno %u ret_ip %pF",
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MAJOR(__entry->dev), MINOR(__entry->dev),
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__entry->type,
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__entry->btnum,
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__entry->level,
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__entry->ptr,
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__entry->agno,
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__entry->bno,
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__entry->ret_ip)
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);
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TRACE_EVENT(xfs_scrub_ifork_btree_error,
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TP_PROTO(struct xfs_scrub_context *sc, struct xfs_btree_cur *cur,
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int level, void *ret_ip),
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TP_ARGS(sc, cur, level, ret_ip),
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TP_STRUCT__entry(
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__field(dev_t, dev)
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__field(xfs_ino_t, ino)
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__field(int, whichfork)
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__field(unsigned int, type)
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__field(xfs_btnum_t, btnum)
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__field(int, level)
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__field(xfs_agnumber_t, agno)
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__field(xfs_agblock_t, bno)
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__field(int, ptr);
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__field(void *, ret_ip)
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),
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TP_fast_assign(
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xfs_fsblock_t fsbno = xfs_scrub_btree_cur_fsbno(cur, level);
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__entry->dev = sc->mp->m_super->s_dev;
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__entry->ino = sc->ip->i_ino;
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__entry->whichfork = cur->bc_private.b.whichfork;
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__entry->type = sc->sm->sm_type;
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__entry->btnum = cur->bc_btnum;
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__entry->level = level;
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__entry->agno = XFS_FSB_TO_AGNO(cur->bc_mp, fsbno);
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__entry->bno = XFS_FSB_TO_AGBNO(cur->bc_mp, fsbno);
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__entry->ptr = cur->bc_ptrs[level];
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__entry->ret_ip = ret_ip;
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),
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TP_printk("dev %d:%d ino %llu fork %d type %u btnum %d level %d ptr %d agno %u agbno %u ret_ip %pF",
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MAJOR(__entry->dev), MINOR(__entry->dev),
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__entry->ino,
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__entry->whichfork,
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__entry->type,
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__entry->btnum,
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__entry->level,
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__entry->ptr,
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__entry->agno,
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__entry->bno,
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__entry->ret_ip)
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);
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#endif /* _TRACE_XFS_SCRUB_TRACE_H */
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#undef TRACE_INCLUDE_PATH
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