diff options
Diffstat (limited to 'fs/xfs/scrub/scrub.h')
| -rw-r--r-- | fs/xfs/scrub/scrub.h | 136 |
1 files changed, 116 insertions, 20 deletions
diff --git a/fs/xfs/scrub/scrub.h b/fs/xfs/scrub/scrub.h index 869a10fe9d7d..5993fcaffb2c 100644 --- a/fs/xfs/scrub/scrub.h +++ b/fs/xfs/scrub/scrub.h @@ -8,6 +8,49 @@ struct xfs_scrub; +struct xchk_relax { + unsigned long next_resched; + unsigned int resched_nr; + bool interruptible; +}; + +/* Yield to the scheduler at most 10x per second. */ +#define XCHK_RELAX_NEXT (jiffies + (HZ / 10)) + +#define INIT_XCHK_RELAX \ + (struct xchk_relax){ \ + .next_resched = XCHK_RELAX_NEXT, \ + .resched_nr = 0, \ + .interruptible = true, \ + } + +/* + * Relax during a scrub operation and exit if there's a fatal signal pending. + * + * If preemption is disabled, we need to yield to the scheduler every now and + * then so that we don't run afoul of the soft lockup watchdog or RCU stall + * detector. cond_resched calls are somewhat expensive (~5ns) so we want to + * ratelimit this to 10x per second. Amortize the cost of the other checks by + * only doing it once every 100 calls. + */ +static inline int xchk_maybe_relax(struct xchk_relax *widget) +{ + /* Amortize the cost of scheduling and checking signals. */ + if (likely(++widget->resched_nr < 100)) + return 0; + widget->resched_nr = 0; + + if (unlikely(widget->next_resched <= jiffies)) { + cond_resched(); + widget->next_resched = XCHK_RELAX_NEXT; + } + + if (widget->interruptible && fatal_signal_pending(current)) + return -EINTR; + + return 0; +} + /* * Standard flags for allocating memory within scrub. NOFS context is * configured by the process allocation scope. Scrub and repair must be able @@ -42,6 +85,14 @@ struct xchk_meta_ops { /* Repair or optimize the metadata. */ int (*repair)(struct xfs_scrub *); + /* + * Re-scrub the metadata we repaired, in case there's extra work that + * we need to do to check our repair work. If this is NULL, we'll use + * the ->scrub function pointer, assuming that the regular scrub is + * sufficient. + */ + int (*repair_eval)(struct xfs_scrub *sc); + /* Decide if we even have this piece of metadata. */ bool (*has)(struct xfs_mount *); @@ -98,9 +149,20 @@ struct xfs_scrub { /* xfile used by the scrubbers; freed at teardown. */ struct xfile *xfile; + /* buffer target for in-memory btrees; also freed at teardown. */ + struct xfs_buftarg *xmbtp; + /* Lock flags for @ip. */ uint ilock_flags; + /* The orphanage, for stashing files that have lost their parent. */ + uint orphanage_ilock_flags; + struct xfs_inode *orphanage; + + /* A temporary file on this filesystem, for staging new metadata. */ + struct xfs_inode *tempip; + uint temp_ilock_flags; + /* See the XCHK/XREP state flags below. */ unsigned int flags; @@ -111,6 +173,9 @@ struct xfs_scrub { */ unsigned int sick_mask; + /* next time we want to cond_resched() */ + struct xchk_relax relax; + /* State tracking for single-AG operations. */ struct xchk_ag sa; }; @@ -120,6 +185,10 @@ struct xfs_scrub { #define XCHK_HAVE_FREEZE_PROT (1U << 1) /* do we have freeze protection? */ #define XCHK_FSGATES_DRAIN (1U << 2) /* defer ops draining enabled */ #define XCHK_NEED_DRAIN (1U << 3) /* scrub needs to drain defer ops */ +#define XCHK_FSGATES_QUOTA (1U << 4) /* quota live update enabled */ +#define XCHK_FSGATES_DIRENTS (1U << 5) /* directory live update enabled */ +#define XCHK_FSGATES_RMAP (1U << 6) /* rmapbt live update enabled */ +#define XREP_RESET_PERAG_RESV (1U << 30) /* must reset AG space reservation */ #define XREP_ALREADY_FIXED (1U << 31) /* checking our repair work */ /* @@ -128,7 +197,44 @@ struct xfs_scrub { * features are gated off via dynamic code patching, which is why the state * must be enabled during scrub setup and can only be torn down afterwards. */ -#define XCHK_FSGATES_ALL (XCHK_FSGATES_DRAIN) +#define XCHK_FSGATES_ALL (XCHK_FSGATES_DRAIN | \ + XCHK_FSGATES_QUOTA | \ + XCHK_FSGATES_DIRENTS | \ + XCHK_FSGATES_RMAP) + +struct xfs_scrub_subord { + struct xfs_scrub sc; + struct xfs_scrub *parent_sc; + unsigned int old_smtype; + unsigned int old_smflags; +}; + +struct xfs_scrub_subord *xchk_scrub_create_subord(struct xfs_scrub *sc, + unsigned int subtype); +void xchk_scrub_free_subord(struct xfs_scrub_subord *sub); + +/* + * We /could/ terminate a scrub/repair operation early. If we're not + * in a good place to continue (fatal signal, etc.) then bail out. + * Note that we're careful not to make any judgements about *error. + */ +static inline bool +xchk_should_terminate( + struct xfs_scrub *sc, + int *error) +{ + if (xchk_maybe_relax(&sc->relax)) { + if (*error == 0) + *error = -EINTR; + return true; + } + return false; +} + +static inline int xchk_nothing(struct xfs_scrub *sc) +{ + return -ENOENT; +} /* Metadata scrubbers */ int xchk_tester(struct xfs_scrub *sc); @@ -136,10 +242,8 @@ int xchk_superblock(struct xfs_scrub *sc); int xchk_agf(struct xfs_scrub *sc); int xchk_agfl(struct xfs_scrub *sc); int xchk_agi(struct xfs_scrub *sc); -int xchk_bnobt(struct xfs_scrub *sc); -int xchk_cntbt(struct xfs_scrub *sc); -int xchk_inobt(struct xfs_scrub *sc); -int xchk_finobt(struct xfs_scrub *sc); +int xchk_allocbt(struct xfs_scrub *sc); +int xchk_iallocbt(struct xfs_scrub *sc); int xchk_rmapbt(struct xfs_scrub *sc); int xchk_refcountbt(struct xfs_scrub *sc); int xchk_inode(struct xfs_scrub *sc); @@ -150,31 +254,23 @@ int xchk_directory(struct xfs_scrub *sc); int xchk_xattr(struct xfs_scrub *sc); int xchk_symlink(struct xfs_scrub *sc); int xchk_parent(struct xfs_scrub *sc); +int xchk_dirtree(struct xfs_scrub *sc); #ifdef CONFIG_XFS_RT int xchk_rtbitmap(struct xfs_scrub *sc); int xchk_rtsummary(struct xfs_scrub *sc); #else -static inline int -xchk_rtbitmap(struct xfs_scrub *sc) -{ - return -ENOENT; -} -static inline int -xchk_rtsummary(struct xfs_scrub *sc) -{ - return -ENOENT; -} +# define xchk_rtbitmap xchk_nothing +# define xchk_rtsummary xchk_nothing #endif #ifdef CONFIG_XFS_QUOTA int xchk_quota(struct xfs_scrub *sc); +int xchk_quotacheck(struct xfs_scrub *sc); #else -static inline int -xchk_quota(struct xfs_scrub *sc) -{ - return -ENOENT; -} +# define xchk_quota xchk_nothing +# define xchk_quotacheck xchk_nothing #endif int xchk_fscounters(struct xfs_scrub *sc); +int xchk_nlinks(struct xfs_scrub *sc); /* cross-referencing helpers */ void xchk_xref_is_used_space(struct xfs_scrub *sc, xfs_agblock_t agbno, |