diff options
Diffstat (limited to 'fs/xfs/scrub/common.c')
| -rw-r--r-- | fs/xfs/scrub/common.c | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/fs/xfs/scrub/common.c b/fs/xfs/scrub/common.c index d2c8f94fac0c..709d4916fe04 100644 --- a/fs/xfs/scrub/common.c +++ b/fs/xfs/scrub/common.c @@ -47,6 +47,196 @@ /* Common code for the metadata scrubbers. */ +/* + * Handling operational errors. + * + * The *_process_error() family of functions are used to process error return + * codes from functions called as part of a scrub operation. + * + * If there's no error, we return true to tell the caller that it's ok + * to move on to the next check in its list. + * + * For non-verifier errors (e.g. ENOMEM) we return false to tell the + * caller that something bad happened, and we preserve *error so that + * the caller can return the *error up the stack to userspace. + * + * Verifier errors (EFSBADCRC/EFSCORRUPTED) are recorded by setting + * OFLAG_CORRUPT in sm_flags and the *error is cleared. In other words, + * we track verifier errors (and failed scrub checks) via OFLAG_CORRUPT, + * not via return codes. We return false to tell the caller that + * something bad happened. Since the error has been cleared, the caller + * will (presumably) return that zero and scrubbing will move on to + * whatever's next. + * + * ftrace can be used to record the precise metadata location and the + * approximate code location of the failed operation. + */ + +/* Check for operational errors. */ +bool +xfs_scrub_process_error( + struct xfs_scrub_context *sc, + xfs_agnumber_t agno, + xfs_agblock_t bno, + int *error) +{ + switch (*error) { + case 0: + return true; + case -EDEADLOCK: + /* Used to restart an op with deadlock avoidance. */ + trace_xfs_scrub_deadlock_retry(sc->ip, sc->sm, *error); + break; + case -EFSBADCRC: + case -EFSCORRUPTED: + /* Note the badness but don't abort. */ + sc->sm->sm_flags |= XFS_SCRUB_OFLAG_CORRUPT; + *error = 0; + /* fall through */ + default: + trace_xfs_scrub_op_error(sc, agno, bno, *error, + __return_address); + break; + } + return false; +} + +/* Check for operational errors for a file offset. */ +bool +xfs_scrub_fblock_process_error( + struct xfs_scrub_context *sc, + int whichfork, + xfs_fileoff_t offset, + int *error) +{ + switch (*error) { + case 0: + return true; + case -EDEADLOCK: + /* Used to restart an op with deadlock avoidance. */ + trace_xfs_scrub_deadlock_retry(sc->ip, sc->sm, *error); + break; + case -EFSBADCRC: + case -EFSCORRUPTED: + /* Note the badness but don't abort. */ + sc->sm->sm_flags |= XFS_SCRUB_OFLAG_CORRUPT; + *error = 0; + /* fall through */ + default: + trace_xfs_scrub_file_op_error(sc, whichfork, offset, *error, + __return_address); + break; + } + return false; +} + +/* + * Handling scrub corruption/optimization/warning checks. + * + * The *_set_{corrupt,preen,warning}() family of functions are used to + * record the presence of metadata that is incorrect (corrupt), could be + * optimized somehow (preen), or should be flagged for administrative + * review but is not incorrect (warn). + * + * ftrace can be used to record the precise metadata location and + * approximate code location of the failed check. + */ + +/* Record a block which could be optimized. */ +void +xfs_scrub_block_set_preen( + struct xfs_scrub_context *sc, + struct xfs_buf *bp) +{ + sc->sm->sm_flags |= XFS_SCRUB_OFLAG_PREEN; + trace_xfs_scrub_block_preen(sc, bp->b_bn, __return_address); +} + +/* + * Record an inode which could be optimized. The trace data will + * include the block given by bp if bp is given; otherwise it will use + * the block location of the inode record itself. + */ +void +xfs_scrub_ino_set_preen( + struct xfs_scrub_context *sc, + struct xfs_buf *bp) +{ + sc->sm->sm_flags |= XFS_SCRUB_OFLAG_PREEN; + trace_xfs_scrub_ino_preen(sc, sc->ip->i_ino, bp ? bp->b_bn : 0, + __return_address); +} + +/* Record a corrupt block. */ +void +xfs_scrub_block_set_corrupt( + struct xfs_scrub_context *sc, + struct xfs_buf *bp) +{ + sc->sm->sm_flags |= XFS_SCRUB_OFLAG_CORRUPT; + trace_xfs_scrub_block_error(sc, bp->b_bn, __return_address); +} + +/* + * Record a corrupt inode. The trace data will include the block given + * by bp if bp is given; otherwise it will use the block location of the + * inode record itself. + */ +void +xfs_scrub_ino_set_corrupt( + struct xfs_scrub_context *sc, + xfs_ino_t ino, + struct xfs_buf *bp) +{ + sc->sm->sm_flags |= XFS_SCRUB_OFLAG_CORRUPT; + trace_xfs_scrub_ino_error(sc, ino, bp ? bp->b_bn : 0, __return_address); +} + +/* Record corruption in a block indexed by a file fork. */ +void +xfs_scrub_fblock_set_corrupt( + struct xfs_scrub_context *sc, + int whichfork, + xfs_fileoff_t offset) +{ + sc->sm->sm_flags |= XFS_SCRUB_OFLAG_CORRUPT; + trace_xfs_scrub_fblock_error(sc, whichfork, offset, __return_address); +} + +/* + * Warn about inodes that need administrative review but is not + * incorrect. + */ +void +xfs_scrub_ino_set_warning( + struct xfs_scrub_context *sc, + struct xfs_buf *bp) +{ + sc->sm->sm_flags |= XFS_SCRUB_OFLAG_WARNING; + trace_xfs_scrub_ino_warning(sc, sc->ip->i_ino, bp ? bp->b_bn : 0, + __return_address); +} + +/* Warn about a block indexed by a file fork that needs review. */ +void +xfs_scrub_fblock_set_warning( + struct xfs_scrub_context *sc, + int whichfork, + xfs_fileoff_t offset) +{ + sc->sm->sm_flags |= XFS_SCRUB_OFLAG_WARNING; + trace_xfs_scrub_fblock_warning(sc, whichfork, offset, __return_address); +} + +/* Signal an incomplete scrub. */ +void +xfs_scrub_set_incomplete( + struct xfs_scrub_context *sc) +{ + sc->sm->sm_flags |= XFS_SCRUB_OFLAG_INCOMPLETE; + trace_xfs_scrub_incomplete(sc, __return_address); +} + /* Per-scrubber setup functions */ /* Set us up with a transaction and an empty context. */ |
