| 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
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| 2 | /* |
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| 3 | * Copyright (c) 2018-2024 Oracle. All Rights Reserved. |
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| 4 | * Author: Darrick J. Wong <djwong@kernel.org> |
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| 5 | */ |
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| 6 | #include "xfs.h" |
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| 7 | #include "xfs_fs.h" |
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| 8 | #include "xfs_shared.h" |
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| 9 | #include "xfs_format.h" |
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| 10 | #include "xfs_trans_resv.h" |
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| 11 | #include "xfs_mount.h" |
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| 12 | #include "xfs_defer.h" |
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| 13 | #include "xfs_btree.h" |
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| 14 | #include "xfs_bit.h" |
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| 15 | #include "xfs_log_format.h" |
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| 16 | #include "xfs_trans.h" |
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| 17 | #include "xfs_sb.h" |
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| 18 | #include "xfs_inode.h" |
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| 19 | #include "xfs_alloc.h" |
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| 20 | #include "xfs_ialloc.h" |
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| 21 | #include "xfs_rmap.h" |
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| 22 | #include "xfs_health.h" |
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| 23 | #include "scrub/xfs_scrub.h" |
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| 24 | #include "scrub/scrub.h" |
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| 25 | #include "scrub/common.h" |
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| 26 | #include "scrub/trace.h" |
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| 27 | #include "scrub/repair.h" |
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| 28 | #include "scrub/fscounters.h" |
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| 29 | |
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| 30 | /* |
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| 31 | * FS Summary Counters |
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| 32 | * =================== |
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| 33 | * |
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| 34 | * We correct errors in the filesystem summary counters by setting them to the |
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| 35 | * values computed during the obligatory scrub phase. However, we must be |
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| 36 | * careful not to allow any other thread to change the counters while we're |
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| 37 | * computing and setting new values. To achieve this, we freeze the |
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| 38 | * filesystem for the whole operation if the REPAIR flag is set. The checking |
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| 39 | * function is stricter when we've frozen the fs. |
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| 40 | */ |
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| 41 | |
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| 42 | /* |
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| 43 | * Reset the superblock counters. Caller is responsible for freezing the |
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| 44 | * filesystem during the calculation and reset phases. |
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| 45 | */ |
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| 46 | int |
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| 47 | xrep_fscounters( |
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| 48 | struct xfs_scrub *sc) |
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| 49 | { |
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| 50 | struct xfs_mount *mp = sc->mp; |
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| 51 | struct xchk_fscounters *fsc = sc->buf; |
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| 52 | |
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| 53 | /* |
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| 54 | * Reinitialize the in-core counters from what we computed. We froze |
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| 55 | * the filesystem, so there shouldn't be anyone else trying to modify |
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| 56 | * these counters. |
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| 57 | */ |
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| 58 | if (!fsc->frozen) { |
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| 59 | ASSERT(fsc->frozen); |
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| 60 | return -EFSCORRUPTED; |
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| 61 | } |
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| 62 | |
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| 63 | trace_xrep_reset_counters(mp, fsc); |
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| 64 | |
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| 65 | percpu_counter_set(&mp->m_icount, fsc->icount); |
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| 66 | percpu_counter_set(&mp->m_ifree, fsc->ifree); |
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| 67 | percpu_counter_set(&mp->m_fdblocks, fsc->fdblocks); |
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| 68 | percpu_counter_set(&mp->m_frextents, fsc->frextents); |
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| 69 | mp->m_sb.sb_frextents = fsc->frextents; |
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| 70 | |
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| 71 | return 0; |
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| 72 | } |
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| 73 | |
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