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linux-next/fs/xfs/scrub/repair.h

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xfs: implement the metadata repair ioctl flag Plumb in the pieces necessary to make the "scrub" subfunction of the scrub ioctl actually work. This means that we make the IFLAG_REPAIR flag to the scrub ioctl actually do something, and we add an errortag knob so that xfstests can force the kernel to rebuild a metadata structure even if there's nothing wrong with it. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Dave Chinner <dchinner@redhat.com>
2018-05-14 21:34:36 +08:00
/*
* Copyright (C) 2018 Oracle. All Rights Reserved.
*
* Author: Darrick J. Wong <darrick.wong@oracle.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it would be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef __XFS_SCRUB_REPAIR_H__
#define __XFS_SCRUB_REPAIR_H__
static inline int xfs_repair_notsupported(struct xfs_scrub_context *sc)
{
return -EOPNOTSUPP;
}
#ifdef CONFIG_XFS_ONLINE_REPAIR
/* Repair helpers */
int xfs_repair_attempt(struct xfs_inode *ip, struct xfs_scrub_context *sc,
bool *fixed);
void xfs_repair_failure(struct xfs_mount *mp);
xfs: add helpers to deal with transaction allocation and rolling For repairs, we need to reserve at least as many blocks as we think we're going to need to rebuild the data structure, and we're going to need some helpers to roll transactions while maintaining locks on the AG headers so that other threads cannot wander into the middle of a repair. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Allison Henderson <allison.henderson@oracle.com>
2018-05-30 13:18:08 +08:00
int xfs_repair_roll_ag_trans(struct xfs_scrub_context *sc);
bool xfs_repair_ag_has_space(struct xfs_perag *pag, xfs_extlen_t nr_blocks,
enum xfs_ag_resv_type type);
xfs_extlen_t xfs_repair_calc_ag_resblks(struct xfs_scrub_context *sc);
xfs: add helpers to allocate and initialize fresh btree roots Add a pair of helper functions to allocate and initialize fresh btree roots. The repair functions will use these as part of recreating corrupted metadata. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Allison Henderson <allison.henderson@oracle.com>
2018-05-30 13:18:09 +08:00
int xfs_repair_alloc_ag_block(struct xfs_scrub_context *sc,
struct xfs_owner_info *oinfo, xfs_fsblock_t *fsbno,
enum xfs_ag_resv_type resv);
int xfs_repair_init_btblock(struct xfs_scrub_context *sc, xfs_fsblock_t fsb,
struct xfs_buf **bpp, xfs_btnum_t btnum,
const struct xfs_buf_ops *ops);
xfs: implement the metadata repair ioctl flag Plumb in the pieces necessary to make the "scrub" subfunction of the scrub ioctl actually work. This means that we make the IFLAG_REPAIR flag to the scrub ioctl actually do something, and we add an errortag knob so that xfstests can force the kernel to rebuild a metadata structure even if there's nothing wrong with it. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Dave Chinner <dchinner@redhat.com>
2018-05-14 21:34:36 +08:00
/* Metadata repairers */
int xfs_repair_probe(struct xfs_scrub_context *sc);
#else
static inline int xfs_repair_attempt(
struct xfs_inode *ip,
struct xfs_scrub_context *sc,
bool *fixed)
{
return -EOPNOTSUPP;
}
static inline void xfs_repair_failure(struct xfs_mount *mp) {}
xfs: add helpers to deal with transaction allocation and rolling For repairs, we need to reserve at least as many blocks as we think we're going to need to rebuild the data structure, and we're going to need some helpers to roll transactions while maintaining locks on the AG headers so that other threads cannot wander into the middle of a repair. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Allison Henderson <allison.henderson@oracle.com>
2018-05-30 13:18:08 +08:00
static inline xfs_extlen_t
xfs_repair_calc_ag_resblks(
struct xfs_scrub_context *sc)
{
ASSERT(!(sc->sm->sm_flags & XFS_SCRUB_IFLAG_REPAIR));
return 0;
}
xfs: implement the metadata repair ioctl flag Plumb in the pieces necessary to make the "scrub" subfunction of the scrub ioctl actually work. This means that we make the IFLAG_REPAIR flag to the scrub ioctl actually do something, and we add an errortag knob so that xfstests can force the kernel to rebuild a metadata structure even if there's nothing wrong with it. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Dave Chinner <dchinner@redhat.com>
2018-05-14 21:34:36 +08:00
#define xfs_repair_probe xfs_repair_notsupported
#endif /* CONFIG_XFS_ONLINE_REPAIR */
#endif /* __XFS_SCRUB_REPAIR_H__ */
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