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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Copyright (c) 2018-2024 Oracle. All Rights Reserved.4 * Author: Darrick J. Wong <djwong@kernel.org>5 */6#include "xfs.h"7#include "xfs_fs.h"8#include "xfs_shared.h"9#include "xfs_format.h"10#include "xfs_trans_resv.h"11#include "xfs_mount.h"12#include "xfs_defer.h"13#include "xfs_btree.h"14#include "xfs_bit.h"15#include "xfs_log_format.h"16#include "xfs_trans.h"17#include "xfs_sb.h"18#include "xfs_inode.h"19#include "xfs_alloc.h"20#include "xfs_ialloc.h"21#include "xfs_rmap.h"22#include "xfs_health.h"23#include "scrub/xfs_scrub.h"24#include "scrub/scrub.h"25#include "scrub/common.h"26#include "scrub/trace.h"27#include "scrub/repair.h"28#include "scrub/fscounters.h"29 30/*31 * FS Summary Counters32 * ===================33 *34 * We correct errors in the filesystem summary counters by setting them to the35 * values computed during the obligatory scrub phase. However, we must be36 * careful not to allow any other thread to change the counters while we're37 * computing and setting new values. To achieve this, we freeze the38 * filesystem for the whole operation if the REPAIR flag is set. The checking39 * function is stricter when we've frozen the fs.40 */41 42/*43 * Reset the superblock counters. Caller is responsible for freezing the44 * filesystem during the calculation and reset phases.45 */46int47xrep_fscounters(48 struct xfs_scrub *sc)49{50 struct xfs_mount *mp = sc->mp;51 struct xchk_fscounters *fsc = sc->buf;52 53 /*54 * Reinitialize the in-core counters from what we computed. We froze55 * the filesystem, so there shouldn't be anyone else trying to modify56 * these counters.57 */58 if (!fsc->frozen) {59 ASSERT(fsc->frozen);60 return -EFSCORRUPTED;61 }62 63 trace_xrep_reset_counters(mp, fsc);64 65 percpu_counter_set(&mp->m_icount, fsc->icount);66 percpu_counter_set(&mp->m_ifree, fsc->ifree);67 percpu_counter_set(&mp->m_fdblocks, fsc->fdblocks);68 69 /*70 * Online repair is only supported on v5 file systems, which require71 * lazy sb counters and thus no update of sb_fdblocks here. But as of72 * now we don't support lazy counting sb_frextents yet, and thus need73 * to also update it directly here. And for that we need to keep74 * track of the delalloc reservations separately, as they are are75 * subtracted from m_frextents, but not included in sb_frextents.76 */77 percpu_counter_set(&mp->m_frextents,78 fsc->frextents - fsc->frextents_delayed);79 mp->m_sb.sb_frextents = fsc->frextents;80 81 return 0;82}83