/* * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc. * All Rights Reserved. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation. * * This program is distributed in the hope that it would be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #include "xfs.h" #include "xfs_format.h" #include "xfs_fs.h" #include "xfs_log_format.h" #include "xfs_trans_resv.h" #include "xfs_mount.h" #include "xfs_errortag.h" #include "xfs_error.h" #include "xfs_sysfs.h" #ifdef DEBUG static unsigned int xfs_errortag_random_default[] = { XFS_RANDOM_DEFAULT, XFS_RANDOM_IFLUSH_1, XFS_RANDOM_IFLUSH_2, XFS_RANDOM_IFLUSH_3, XFS_RANDOM_IFLUSH_4, XFS_RANDOM_IFLUSH_5, XFS_RANDOM_IFLUSH_6, XFS_RANDOM_DA_READ_BUF, XFS_RANDOM_BTREE_CHECK_LBLOCK, XFS_RANDOM_BTREE_CHECK_SBLOCK, XFS_RANDOM_ALLOC_READ_AGF, XFS_RANDOM_IALLOC_READ_AGI, XFS_RANDOM_ITOBP_INOTOBP, XFS_RANDOM_IUNLINK, XFS_RANDOM_IUNLINK_REMOVE, XFS_RANDOM_DIR_INO_VALIDATE, XFS_RANDOM_BULKSTAT_READ_CHUNK, XFS_RANDOM_IODONE_IOERR, XFS_RANDOM_STRATREAD_IOERR, XFS_RANDOM_STRATCMPL_IOERR, XFS_RANDOM_DIOWRITE_IOERR, XFS_RANDOM_BMAPIFORMAT, XFS_RANDOM_FREE_EXTENT, XFS_RANDOM_RMAP_FINISH_ONE, XFS_RANDOM_REFCOUNT_CONTINUE_UPDATE, XFS_RANDOM_REFCOUNT_FINISH_ONE, XFS_RANDOM_BMAP_FINISH_ONE, XFS_RANDOM_AG_RESV_CRITICAL, XFS_RANDOM_DROP_WRITES, XFS_RANDOM_LOG_BAD_CRC, XFS_RANDOM_LOG_ITEM_PIN, XFS_RANDOM_BUF_LRU_REF, }; struct xfs_errortag_attr { struct attribute attr; unsigned int tag; }; static inline struct xfs_errortag_attr * to_attr(struct attribute *attr) { return container_of(attr, struct xfs_errortag_attr, attr); } static inline struct xfs_mount * to_mp(struct kobject *kobject) { struct xfs_kobj *kobj = to_kobj(kobject); return container_of(kobj, struct xfs_mount, m_errortag_kobj); } STATIC ssize_t xfs_errortag_attr_store( struct kobject *kobject, struct attribute *attr, const char *buf, size_t count) { struct xfs_mount *mp = to_mp(kobject); struct xfs_errortag_attr *xfs_attr = to_attr(attr); int ret; unsigned int val; if (strcmp(buf, "default") == 0) { val = xfs_errortag_random_default[xfs_attr->tag]; } else { ret = kstrtouint(buf, 0, &val); if (ret) return ret; } ret = xfs_errortag_set(mp, xfs_attr->tag, val); if (ret) return ret; return count; } STATIC ssize_t xfs_errortag_attr_show( struct kobject *kobject, struct attribute *attr, char *buf) { struct xfs_mount *mp = to_mp(kobject); struct xfs_errortag_attr *xfs_attr = to_attr(attr); return snprintf(buf, PAGE_SIZE, "%u\n", xfs_errortag_get(mp, xfs_attr->tag)); } static const struct sysfs_ops xfs_errortag_sysfs_ops = { .show = xfs_errortag_attr_show, .store = xfs_errortag_attr_store, }; #define XFS_ERRORTAG_ATTR_RW(_name, _tag) \ static struct xfs_errortag_attr xfs_errortag_attr_##_name = { \ .attr = {.name = __stringify(_name), \ .mode = VERIFY_OCTAL_PERMISSIONS(S_IWUSR | S_IRUGO) }, \ .tag = (_tag), \ } #define XFS_ERRORTAG_ATTR_LIST(_name) &xfs_errortag_attr_##_name.attr XFS_ERRORTAG_ATTR_RW(noerror, XFS_ERRTAG_NOERROR); XFS_ERRORTAG_ATTR_RW(iflush1, XFS_ERRTAG_IFLUSH_1); XFS_ERRORTAG_ATTR_RW(iflush2, XFS_ERRTAG_IFLUSH_2); XFS_ERRORTAG_ATTR_RW(iflush3, XFS_ERRTAG_IFLUSH_3); XFS_ERRORTAG_ATTR_RW(iflush4, XFS_ERRTAG_IFLUSH_4); XFS_ERRORTAG_ATTR_RW(iflush5, XFS_ERRTAG_IFLUSH_5); XFS_ERRORTAG_ATTR_RW(iflush6, XFS_ERRTAG_IFLUSH_6); XFS_ERRORTAG_ATTR_RW(dareadbuf, XFS_ERRTAG_DA_READ_BUF); XFS_ERRORTAG_ATTR_RW(btree_chk_lblk, XFS_ERRTAG_BTREE_CHECK_LBLOCK); XFS_ERRORTAG_ATTR_RW(btree_chk_sblk, XFS_ERRTAG_BTREE_CHECK_SBLOCK); XFS_ERRORTAG_ATTR_RW(readagf, XFS_ERRTAG_ALLOC_READ_AGF); XFS_ERRORTAG_ATTR_RW(readagi, XFS_ERRTAG_IALLOC_READ_AGI); XFS_ERRORTAG_ATTR_RW(itobp, XFS_ERRTAG_ITOBP_INOTOBP); XFS_ERRORTAG_ATTR_RW(iunlink, XFS_ERRTAG_IUNLINK); XFS_ERRORTAG_ATTR_RW(iunlinkrm, XFS_ERRTAG_IUNLINK_REMOVE); XFS_ERRORTAG_ATTR_RW(dirinovalid, XFS_ERRTAG_DIR_INO_VALIDATE); XFS_ERRORTAG_ATTR_RW(bulkstat, XFS_ERRTAG_BULKSTAT_READ_CHUNK); XFS_ERRORTAG_ATTR_RW(logiodone, XFS_ERRTAG_IODONE_IOERR); XFS_ERRORTAG_ATTR_RW(stratread, XFS_ERRTAG_STRATREAD_IOERR); XFS_ERRORTAG_ATTR_RW(stratcmpl, XFS_ERRTAG_STRATCMPL_IOERR); XFS_ERRORTAG_ATTR_RW(diowrite, XFS_ERRTAG_DIOWRITE_IOERR); XFS_ERRORTAG_ATTR_RW(bmapifmt, XFS_ERRTAG_BMAPIFORMAT); XFS_ERRORTAG_ATTR_RW(free_extent, XFS_ERRTAG_FREE_EXTENT); XFS_ERRORTAG_ATTR_RW(rmap_finish_one, XFS_ERRTAG_RMAP_FINISH_ONE); XFS_ERRORTAG_ATTR_RW(refcount_continue_update, XFS_ERRTAG_REFCOUNT_CONTINUE_UPDATE); XFS_ERRORTAG_ATTR_RW(refcount_finish_one, XFS_ERRTAG_REFCOUNT_FINISH_ONE); XFS_ERRORTAG_ATTR_RW(bmap_finish_one, XFS_ERRTAG_BMAP_FINISH_ONE); XFS_ERRORTAG_ATTR_RW(ag_resv_critical, XFS_ERRTAG_AG_RESV_CRITICAL); XFS_ERRORTAG_ATTR_RW(drop_writes, XFS_ERRTAG_DROP_WRITES); XFS_ERRORTAG_ATTR_RW(log_bad_crc, XFS_ERRTAG_LOG_BAD_CRC); XFS_ERRORTAG_ATTR_RW(log_item_pin, XFS_ERRTAG_LOG_ITEM_PIN); XFS_ERRORTAG_ATTR_RW(buf_lru_ref, XFS_ERRTAG_BUF_LRU_REF); static struct attribute *xfs_errortag_attrs[] = { XFS_ERRORTAG_ATTR_LIST(noerror), XFS_ERRORTAG_ATTR_LIST(iflush1), XFS_ERRORTAG_ATTR_LIST(iflush2), XFS_ERRORTAG_ATTR_LIST(iflush3), XFS_ERRORTAG_ATTR_LIST(iflush4), XFS_ERRORTAG_ATTR_LIST(iflush5), XFS_ERRORTAG_ATTR_LIST(iflush6), XFS_ERRORTAG_ATTR_LIST(dareadbuf), XFS_ERRORTAG_ATTR_LIST(btree_chk_lblk), XFS_ERRORTAG_ATTR_LIST(btree_chk_sblk), XFS_ERRORTAG_ATTR_LIST(readagf), XFS_ERRORTAG_ATTR_LIST(readagi), XFS_ERRORTAG_ATTR_LIST(itobp), XFS_ERRORTAG_ATTR_LIST(iunlink), XFS_ERRORTAG_ATTR_LIST(iunlinkrm), XFS_ERRORTAG_ATTR_LIST(dirinovalid), XFS_ERRORTAG_ATTR_LIST(bulkstat), XFS_ERRORTAG_ATTR_LIST(logiodone), XFS_ERRORTAG_ATTR_LIST(stratread), XFS_ERRORTAG_ATTR_LIST(stratcmpl), XFS_ERRORTAG_ATTR_LIST(diowrite), XFS_ERRORTAG_ATTR_LIST(bmapifmt), XFS_ERRORTAG_ATTR_LIST(free_extent), XFS_ERRORTAG_ATTR_LIST(rmap_finish_one), XFS_ERRORTAG_ATTR_LIST(refcount_continue_update), XFS_ERRORTAG_ATTR_LIST(refcount_finish_one), XFS_ERRORTAG_ATTR_LIST(bmap_finish_one), XFS_ERRORTAG_ATTR_LIST(ag_resv_critical), XFS_ERRORTAG_ATTR_LIST(drop_writes), XFS_ERRORTAG_ATTR_LIST(log_bad_crc), XFS_ERRORTAG_ATTR_LIST(log_item_pin), XFS_ERRORTAG_ATTR_LIST(buf_lru_ref), NULL, }; static struct kobj_type xfs_errortag_ktype = { .release = xfs_sysfs_release, .sysfs_ops = &xfs_errortag_sysfs_ops, .default_attrs = xfs_errortag_attrs, }; int xfs_errortag_init( struct xfs_mount *mp) { mp->m_errortag = kmem_zalloc(sizeof(unsigned int) * XFS_ERRTAG_MAX, KM_SLEEP | KM_MAYFAIL); if (!mp->m_errortag) return -ENOMEM; return xfs_sysfs_init(&mp->m_errortag_kobj, &xfs_errortag_ktype, &mp->m_kobj, "errortag"); } void xfs_errortag_del( struct xfs_mount *mp) { xfs_sysfs_del(&mp->m_errortag_kobj); kmem_free(mp->m_errortag); } bool xfs_errortag_test( struct xfs_mount *mp, const char *expression, const char *file, int line, unsigned int error_tag) { unsigned int randfactor; /* * To be able to use error injection anywhere, we need to ensure error * injection mechanism is already initialized. * * Code paths like I/O completion can be called before the * initialization is complete, but be able to inject errors in such * places is still useful. */ if (!mp->m_errortag) return false; ASSERT(error_tag < XFS_ERRTAG_MAX); randfactor = mp->m_errortag[error_tag]; if (!randfactor || prandom_u32() % randfactor) return false; xfs_warn_ratelimited(mp, "Injecting error (%s) at file %s, line %d, on filesystem \"%s\"", expression, file, line, mp->m_fsname); return true; } int xfs_errortag_get( struct xfs_mount *mp, unsigned int error_tag) { if (error_tag >= XFS_ERRTAG_MAX) return -EINVAL; return mp->m_errortag[error_tag]; } int xfs_errortag_set( struct xfs_mount *mp, unsigned int error_tag, unsigned int tag_value) { if (error_tag >= XFS_ERRTAG_MAX) return -EINVAL; mp->m_errortag[error_tag] = tag_value; return 0; } int xfs_errortag_add( struct xfs_mount *mp, unsigned int error_tag) { if (error_tag >= XFS_ERRTAG_MAX) return -EINVAL; return xfs_errortag_set(mp, error_tag, xfs_errortag_random_default[error_tag]); } int xfs_errortag_clearall( struct xfs_mount *mp) { memset(mp->m_errortag, 0, sizeof(unsigned int) * XFS_ERRTAG_MAX); return 0; } #endif /* DEBUG */ void xfs_error_report( const char *tag, int level, struct xfs_mount *mp, const char *filename, int linenum, xfs_failaddr_t failaddr) { if (level <= xfs_error_level) { xfs_alert_tag(mp, XFS_PTAG_ERROR_REPORT, "Internal error %s at line %d of file %s. Caller %pS", tag, linenum, filename, failaddr); xfs_stack_trace(); } } void xfs_corruption_error( const char *tag, int level, struct xfs_mount *mp, void *p, const char *filename, int linenum, xfs_failaddr_t failaddr) { if (level <= xfs_error_level) xfs_hex_dump(p, XFS_CORRUPTION_DUMP_LEN); xfs_error_report(tag, level, mp, filename, linenum, failaddr); xfs_alert(mp, "Corruption detected. Unmount and run xfs_repair"); } /* * Warnings specifically for verifier errors. Differentiate CRC vs. invalid * values, and omit the stack trace unless the error level is tuned high. */ void xfs_verifier_error( struct xfs_buf *bp, int error, xfs_failaddr_t failaddr) { struct xfs_mount *mp = bp->b_target->bt_mount; xfs_failaddr_t fa; fa = failaddr ? failaddr : __return_address; __xfs_buf_ioerror(bp, error, fa); xfs_alert(mp, "Metadata %s detected at %pS, %s block 0x%llx", bp->b_error == -EFSBADCRC ? "CRC error" : "corruption", fa, bp->b_ops->name, bp->b_bn); xfs_alert(mp, "Unmount and run xfs_repair"); if (xfs_error_level >= XFS_ERRLEVEL_LOW) { xfs_alert(mp, "First %d bytes of corrupted metadata buffer:", XFS_CORRUPTION_DUMP_LEN); xfs_hex_dump(xfs_buf_offset(bp, 0), XFS_CORRUPTION_DUMP_LEN); } if (xfs_error_level >= XFS_ERRLEVEL_HIGH) xfs_stack_trace(); }