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/*
* 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.
*/
#include "xfs.h"
#include "xfs_fs.h"
#include "xfs_shared.h"
#include "xfs_format.h"
#include "xfs_trans_resv.h"
#include "xfs_mount.h"
#include "xfs_defer.h"
#include "xfs_btree.h"
#include "xfs_bit.h"
#include "xfs_log_format.h"
#include "xfs_trans.h"
#include "xfs_sb.h"
#include "xfs_inode.h"
#include "xfs_icache.h"
#include "xfs_alloc.h"
#include "xfs_alloc_btree.h"
#include "xfs_ialloc.h"
#include "xfs_ialloc_btree.h"
#include "xfs_rmap.h"
#include "xfs_rmap_btree.h"
#include "xfs_refcount.h"
#include "xfs_refcount_btree.h"
#include "xfs_extent_busy.h"
#include "xfs_ag_resv.h"
#include "xfs_trans_space.h"
#include "scrub/xfs_scrub.h"
#include "scrub/scrub.h"
#include "scrub/common.h"
#include "scrub/trace.h"
#include "scrub/repair.h"
/*
* Attempt to repair some metadata, if the metadata is corrupt and userspace
* told us to fix it. This function returns -EAGAIN to mean "re-run scrub",
* and will set *fixed to true if it thinks it repaired anything.
*/
int
xfs_repair_attempt(
struct xfs_inode *ip,
struct xfs_scrub_context *sc,
bool *fixed)
{
int error = 0;
trace_xfs_repair_attempt(ip, sc->sm, error);
xfs_scrub_ag_btcur_free(&sc->sa);
/* Repair whatever's broken. */
ASSERT(sc->ops->repair);
error = sc->ops->repair(sc);
trace_xfs_repair_done(ip, sc->sm, error);
switch (error) {
case 0:
/*
* Repair succeeded. Commit the fixes and perform a second
* scrub so that we can tell userspace if we fixed the problem.
*/
sc->sm->sm_flags &= ~XFS_SCRUB_FLAGS_OUT;
*fixed = true;
return -EAGAIN;
case -EDEADLOCK:
case -EAGAIN:
/* Tell the caller to try again having grabbed all the locks. */
if (!sc->try_harder) {
sc->try_harder = true;
return -EAGAIN;
}
/*
* We tried harder but still couldn't grab all the resources
* we needed to fix it. The corruption has not been fixed,
* so report back to userspace.
*/
return -EFSCORRUPTED;
default:
return error;
}
}
/*
* Complain about unfixable problems in the filesystem. We don't log
* corruptions when IFLAG_REPAIR wasn't set on the assumption that the driver
* program is xfs_scrub, which will call back with IFLAG_REPAIR set if the
* administrator isn't running xfs_scrub in no-repairs mode.
*
* Use this helper function because _ratelimited silently declares a static
* structure to track rate limiting information.
*/
void
xfs_repair_failure(
struct xfs_mount *mp)
{
xfs_alert_ratelimited(mp,
"Corruption not fixed during online repair. Unmount and run xfs_repair.");
}
/*
* Repair probe -- userspace uses this to probe if we're willing to repair a
* given mountpoint.
*/
int
xfs_repair_probe(
struct xfs_scrub_context *sc)
{
int error = 0;
if (xfs_scrub_should_terminate(sc, &error))
return error;
return 0;
}
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