131 lines
3.5 KiB
C
131 lines
3.5 KiB
C
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/*
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* Copyright (C) 2018 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_icache.h"
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#include "xfs_alloc.h"
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#include "xfs_alloc_btree.h"
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#include "xfs_ialloc.h"
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#include "xfs_ialloc_btree.h"
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#include "xfs_rmap.h"
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#include "xfs_rmap_btree.h"
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#include "xfs_refcount.h"
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#include "xfs_refcount_btree.h"
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#include "xfs_extent_busy.h"
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#include "xfs_ag_resv.h"
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#include "xfs_trans_space.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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#include "scrub/trace.h"
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#include "scrub/repair.h"
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/*
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* Attempt to repair some metadata, if the metadata is corrupt and userspace
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* told us to fix it. This function returns -EAGAIN to mean "re-run scrub",
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* and will set *fixed to true if it thinks it repaired anything.
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*/
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int
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xfs_repair_attempt(
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struct xfs_inode *ip,
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struct xfs_scrub_context *sc,
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bool *fixed)
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{
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int error = 0;
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trace_xfs_repair_attempt(ip, sc->sm, error);
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xfs_scrub_ag_btcur_free(&sc->sa);
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/* Repair whatever's broken. */
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ASSERT(sc->ops->repair);
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error = sc->ops->repair(sc);
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trace_xfs_repair_done(ip, sc->sm, error);
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switch (error) {
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case 0:
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/*
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* Repair succeeded. Commit the fixes and perform a second
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* scrub so that we can tell userspace if we fixed the problem.
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*/
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sc->sm->sm_flags &= ~XFS_SCRUB_FLAGS_OUT;
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*fixed = true;
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return -EAGAIN;
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case -EDEADLOCK:
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case -EAGAIN:
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/* Tell the caller to try again having grabbed all the locks. */
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if (!sc->try_harder) {
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sc->try_harder = true;
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return -EAGAIN;
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}
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/*
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* We tried harder but still couldn't grab all the resources
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* we needed to fix it. The corruption has not been fixed,
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* so report back to userspace.
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*/
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return -EFSCORRUPTED;
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default:
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return error;
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}
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}
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/*
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* Complain about unfixable problems in the filesystem. We don't log
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* corruptions when IFLAG_REPAIR wasn't set on the assumption that the driver
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* program is xfs_scrub, which will call back with IFLAG_REPAIR set if the
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* administrator isn't running xfs_scrub in no-repairs mode.
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*
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* Use this helper function because _ratelimited silently declares a static
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* structure to track rate limiting information.
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*/
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void
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xfs_repair_failure(
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struct xfs_mount *mp)
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{
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xfs_alert_ratelimited(mp,
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"Corruption not fixed during online repair. Unmount and run xfs_repair.");
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}
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/*
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* Repair probe -- userspace uses this to probe if we're willing to repair a
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* given mountpoint.
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*/
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int
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xfs_repair_probe(
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struct xfs_scrub_context *sc)
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{
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int error = 0;
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if (xfs_scrub_should_terminate(sc, &error))
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return error;
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return 0;
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}
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