Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Darrick J. Wong | 899 | 89.90% | 30 | 75.00% |
Christoph Hellwig | 40 | 4.00% | 2 | 5.00% |
Eric Sandeen | 36 | 3.60% | 1 | 2.50% |
David Chinner | 16 | 1.60% | 5 | 12.50% |
Russell Cattelan | 8 | 0.80% | 1 | 2.50% |
Nathan Scott | 1 | 0.10% | 1 | 2.50% |
Total | 1000 | 40 |
// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright (C) 2019-2023 Oracle. All Rights Reserved. * Author: Darrick J. Wong <djwong@kernel.org> */ #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_btree.h" #include "xfs_ag.h" #include "xfs_health.h" #include "scrub/scrub.h" #include "scrub/health.h" #include "scrub/common.h" /* * Scrub and In-Core Filesystem Health Assessments * =============================================== * * Online scrub and repair have the time and the ability to perform stronger * checks than we can do from the metadata verifiers, because they can * cross-reference records between data structures. Therefore, scrub is in a * good position to update the online filesystem health assessments to reflect * the good/bad state of the data structure. * * We therefore extend scrub in the following ways to achieve this: * * 1. Create a "sick_mask" field in the scrub context. When we're setting up a * scrub call, set this to the default XFS_SICK_* flag(s) for the selected * scrub type (call it A). Scrub and repair functions can override the default * sick_mask value if they choose. * * 2. If the scrubber returns a runtime error code, we exit making no changes * to the incore sick state. * * 3. If the scrubber finds that A is clean, use sick_mask to clear the incore * sick flags before exiting. * * 4. If the scrubber finds that A is corrupt, use sick_mask to set the incore * sick flags. If the user didn't want to repair then we exit, leaving the * metadata structure unfixed and the sick flag set. * * 5. Now we know that A is corrupt and the user wants to repair, so run the * repairer. If the repairer returns an error code, we exit with that error * code, having made no further changes to the incore sick state. * * 6. If repair rebuilds A correctly and the subsequent re-scrub of A is clean, * use sick_mask to clear the incore sick flags. This should have the effect * that A is no longer marked sick. * * 7. If repair rebuilds A incorrectly, the re-scrub will find it corrupt and * use sick_mask to set the incore sick flags. This should have no externally * visible effect since we already set them in step (4). * * There are some complications to this story, however. For certain types of * complementary metadata indices (e.g. inobt/finobt), it is easier to rebuild * both structures at the same time. The following principles apply to this * type of repair strategy: * * 8. Any repair function that rebuilds multiple structures should update * sick_mask_visible to reflect whatever other structures are rebuilt, and * verify that all the rebuilt structures can pass a scrub check. The outcomes * of 5-7 still apply, but with a sick_mask that covers everything being * rebuilt. */ /* Map our scrub type to a sick mask and a set of health update functions. */ enum xchk_health_group { XHG_FS = 1, XHG_RT, XHG_AG, XHG_INO, }; struct xchk_health_map { enum xchk_health_group group; unsigned int sick_mask; }; static const struct xchk_health_map type_to_health_flag[XFS_SCRUB_TYPE_NR] = { [XFS_SCRUB_TYPE_SB] = { XHG_AG, XFS_SICK_AG_SB }, [XFS_SCRUB_TYPE_AGF] = { XHG_AG, XFS_SICK_AG_AGF }, [XFS_SCRUB_TYPE_AGFL] = { XHG_AG, XFS_SICK_AG_AGFL }, [XFS_SCRUB_TYPE_AGI] = { XHG_AG, XFS_SICK_AG_AGI }, [XFS_SCRUB_TYPE_BNOBT] = { XHG_AG, XFS_SICK_AG_BNOBT }, [XFS_SCRUB_TYPE_CNTBT] = { XHG_AG, XFS_SICK_AG_CNTBT }, [XFS_SCRUB_TYPE_INOBT] = { XHG_AG, XFS_SICK_AG_INOBT }, [XFS_SCRUB_TYPE_FINOBT] = { XHG_AG, XFS_SICK_AG_FINOBT }, [XFS_SCRUB_TYPE_RMAPBT] = { XHG_AG, XFS_SICK_AG_RMAPBT }, [XFS_SCRUB_TYPE_REFCNTBT] = { XHG_AG, XFS_SICK_AG_REFCNTBT }, [XFS_SCRUB_TYPE_INODE] = { XHG_INO, XFS_SICK_INO_CORE }, [XFS_SCRUB_TYPE_BMBTD] = { XHG_INO, XFS_SICK_INO_BMBTD }, [XFS_SCRUB_TYPE_BMBTA] = { XHG_INO, XFS_SICK_INO_BMBTA }, [XFS_SCRUB_TYPE_BMBTC] = { XHG_INO, XFS_SICK_INO_BMBTC }, [XFS_SCRUB_TYPE_DIR] = { XHG_INO, XFS_SICK_INO_DIR }, [XFS_SCRUB_TYPE_XATTR] = { XHG_INO, XFS_SICK_INO_XATTR }, [XFS_SCRUB_TYPE_SYMLINK] = { XHG_INO, XFS_SICK_INO_SYMLINK }, [XFS_SCRUB_TYPE_PARENT] = { XHG_INO, XFS_SICK_INO_PARENT }, [XFS_SCRUB_TYPE_RTBITMAP] = { XHG_RT, XFS_SICK_RT_BITMAP }, [XFS_SCRUB_TYPE_RTSUM] = { XHG_RT, XFS_SICK_RT_SUMMARY }, [XFS_SCRUB_TYPE_UQUOTA] = { XHG_FS, XFS_SICK_FS_UQUOTA }, [XFS_SCRUB_TYPE_GQUOTA] = { XHG_FS, XFS_SICK_FS_GQUOTA }, [XFS_SCRUB_TYPE_PQUOTA] = { XHG_FS, XFS_SICK_FS_PQUOTA }, [XFS_SCRUB_TYPE_FSCOUNTERS] = { XHG_FS, XFS_SICK_FS_COUNTERS }, [XFS_SCRUB_TYPE_QUOTACHECK] = { XHG_FS, XFS_SICK_FS_QUOTACHECK }, [XFS_SCRUB_TYPE_NLINKS] = { XHG_FS, XFS_SICK_FS_NLINKS }, [XFS_SCRUB_TYPE_DIRTREE] = { XHG_INO, XFS_SICK_INO_DIRTREE }, }; /* Return the health status mask for this scrub type. */ unsigned int xchk_health_mask_for_scrub_type( __u32 scrub_type) { return type_to_health_flag[scrub_type].sick_mask; } /* * If the scrub state is clean, add @mask to the scrub sick mask to clear * additional sick flags from the metadata object's sick state. */ void xchk_mark_healthy_if_clean( struct xfs_scrub *sc, unsigned int mask) { if (!(sc->sm->sm_flags & (XFS_SCRUB_OFLAG_CORRUPT | XFS_SCRUB_OFLAG_XCORRUPT))) sc->sick_mask |= mask; } /* * If we're scrubbing a piece of file metadata for the first time, does it look * like it has been zapped? Skip the check if we just repaired the metadata * and are revalidating it. */ bool xchk_file_looks_zapped( struct xfs_scrub *sc, unsigned int mask) { ASSERT((mask & ~XFS_SICK_INO_ZAPPED) == 0); if (sc->flags & XREP_ALREADY_FIXED) return false; return xfs_inode_has_sickness(sc->ip, mask); } /* * Scrub gave the filesystem a clean bill of health, so clear all the indirect * markers of past problems (at least for the fs and ags) so that we can be * healthy again. */ STATIC void xchk_mark_all_healthy( struct xfs_mount *mp) { struct xfs_perag *pag; xfs_agnumber_t agno; xfs_fs_mark_healthy(mp, XFS_SICK_FS_INDIRECT); xfs_rt_mark_healthy(mp, XFS_SICK_RT_INDIRECT); for_each_perag(mp, agno, pag) xfs_ag_mark_healthy(pag, XFS_SICK_AG_INDIRECT); } /* * Update filesystem health assessments based on what we found and did. * * If the scrubber finds errors, we mark sick whatever's mentioned in * sick_mask, no matter whether this is a first scan or an * evaluation of repair effectiveness. * * Otherwise, no direct corruption was found, so mark whatever's in * sick_mask as healthy. */ void xchk_update_health( struct xfs_scrub *sc) { struct xfs_perag *pag; bool bad; /* * The HEALTHY scrub type is a request from userspace to clear all the * indirect flags after a clean scan of the entire filesystem. As such * there's no sick flag defined for it, so we branch here ahead of the * mask check. */ if (sc->sm->sm_type == XFS_SCRUB_TYPE_HEALTHY && !(sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)) { xchk_mark_all_healthy(sc->mp); return; } if (!sc->sick_mask) return; bad = (sc->sm->sm_flags & (XFS_SCRUB_OFLAG_CORRUPT | XFS_SCRUB_OFLAG_XCORRUPT)); switch (type_to_health_flag[sc->sm->sm_type].group) { case XHG_AG: pag = xfs_perag_get(sc->mp, sc->sm->sm_agno); if (bad) xfs_ag_mark_corrupt(pag, sc->sick_mask); else xfs_ag_mark_healthy(pag, sc->sick_mask); xfs_perag_put(pag); break; case XHG_INO: if (!sc->ip) return; if (bad) { unsigned int mask = sc->sick_mask; /* * If we're coming in for repairs then we don't want * sickness flags to propagate to the incore health * status if the inode gets inactivated before we can * fix it. */ if (sc->sm->sm_flags & XFS_SCRUB_IFLAG_REPAIR) mask |= XFS_SICK_INO_FORGET; xfs_inode_mark_corrupt(sc->ip, mask); } else xfs_inode_mark_healthy(sc->ip, sc->sick_mask); break; case XHG_FS: if (bad) xfs_fs_mark_corrupt(sc->mp, sc->sick_mask); else xfs_fs_mark_healthy(sc->mp, sc->sick_mask); break; case XHG_RT: if (bad) xfs_rt_mark_corrupt(sc->mp, sc->sick_mask); else xfs_rt_mark_healthy(sc->mp, sc->sick_mask); break; default: ASSERT(0); break; } } /* Is the given per-AG btree healthy enough for scanning? */ void xchk_ag_btree_del_cursor_if_sick( struct xfs_scrub *sc, struct xfs_btree_cur **curp, unsigned int sm_type) { unsigned int mask = (*curp)->bc_ops->sick_mask; /* * We always want the cursor if it's the same type as whatever we're * scrubbing, even if we already know the structure is corrupt. * * Otherwise, we're only interested in the btree for cross-referencing. * If we know the btree is bad then don't bother, just set XFAIL. */ if (sc->sm->sm_type == sm_type) return; /* * If we just repaired some AG metadata, sc->sick_mask will reflect all * the per-AG metadata types that were repaired. Exclude these from * the filesystem health query because we have not yet updated the * health status and we want everything to be scanned. */ if ((sc->flags & XREP_ALREADY_FIXED) && type_to_health_flag[sc->sm->sm_type].group == XHG_AG) mask &= ~sc->sick_mask; if (xfs_ag_has_sickness((*curp)->bc_ag.pag, mask)) { sc->sm->sm_flags |= XFS_SCRUB_OFLAG_XFAIL; xfs_btree_del_cursor(*curp, XFS_BTREE_NOERROR); *curp = NULL; } } /* * Quick scan to double-check that there isn't any evidence of lingering * primary health problems. If we're still clear, then the health update will * take care of clearing the indirect evidence. */ int xchk_health_record( struct xfs_scrub *sc) { struct xfs_mount *mp = sc->mp; struct xfs_perag *pag; xfs_agnumber_t agno; unsigned int sick; unsigned int checked; xfs_fs_measure_sickness(mp, &sick, &checked); if (sick & XFS_SICK_FS_PRIMARY) xchk_set_corrupt(sc); xfs_rt_measure_sickness(mp, &sick, &checked); if (sick & XFS_SICK_RT_PRIMARY) xchk_set_corrupt(sc); for_each_perag(mp, agno, pag) { xfs_ag_measure_sickness(pag, &sick, &checked); if (sick & XFS_SICK_AG_PRIMARY) xchk_set_corrupt(sc); } return 0; }
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