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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-30 07:56:45 +07:00
d04c241c66
While adding error injection into IO completion, I notice the lack of initialization check in xfs_errortag_test(), make the error injection mechanism unable to be used there. IO completion is executed a few times before the error injection mechanism is initialized, so to be safer, make xfs_errortag_test() check if the errortag is properly initialized. Signed-off-by: Carlos Maiolino <cmaiolino@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
361 lines
9.6 KiB
C
361 lines
9.6 KiB
C
/*
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* Copyright (c) 2000-2001,2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "xfs.h"
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#include "xfs_format.h"
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#include "xfs_fs.h"
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#include "xfs_log_format.h"
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#include "xfs_trans_resv.h"
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#include "xfs_mount.h"
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#include "xfs_error.h"
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#include "xfs_sysfs.h"
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#ifdef DEBUG
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static unsigned int xfs_errortag_random_default[] = {
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XFS_RANDOM_DEFAULT,
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XFS_RANDOM_IFLUSH_1,
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XFS_RANDOM_IFLUSH_2,
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XFS_RANDOM_IFLUSH_3,
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XFS_RANDOM_IFLUSH_4,
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XFS_RANDOM_IFLUSH_5,
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XFS_RANDOM_IFLUSH_6,
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XFS_RANDOM_DA_READ_BUF,
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XFS_RANDOM_BTREE_CHECK_LBLOCK,
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XFS_RANDOM_BTREE_CHECK_SBLOCK,
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XFS_RANDOM_ALLOC_READ_AGF,
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XFS_RANDOM_IALLOC_READ_AGI,
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XFS_RANDOM_ITOBP_INOTOBP,
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XFS_RANDOM_IUNLINK,
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XFS_RANDOM_IUNLINK_REMOVE,
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XFS_RANDOM_DIR_INO_VALIDATE,
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XFS_RANDOM_BULKSTAT_READ_CHUNK,
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XFS_RANDOM_IODONE_IOERR,
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XFS_RANDOM_STRATREAD_IOERR,
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XFS_RANDOM_STRATCMPL_IOERR,
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XFS_RANDOM_DIOWRITE_IOERR,
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XFS_RANDOM_BMAPIFORMAT,
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XFS_RANDOM_FREE_EXTENT,
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XFS_RANDOM_RMAP_FINISH_ONE,
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XFS_RANDOM_REFCOUNT_CONTINUE_UPDATE,
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XFS_RANDOM_REFCOUNT_FINISH_ONE,
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XFS_RANDOM_BMAP_FINISH_ONE,
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XFS_RANDOM_AG_RESV_CRITICAL,
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XFS_RANDOM_DROP_WRITES,
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XFS_RANDOM_LOG_BAD_CRC,
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};
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struct xfs_errortag_attr {
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struct attribute attr;
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unsigned int tag;
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};
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static inline struct xfs_errortag_attr *
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to_attr(struct attribute *attr)
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{
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return container_of(attr, struct xfs_errortag_attr, attr);
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}
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static inline struct xfs_mount *
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to_mp(struct kobject *kobject)
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{
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struct xfs_kobj *kobj = to_kobj(kobject);
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return container_of(kobj, struct xfs_mount, m_errortag_kobj);
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}
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STATIC ssize_t
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xfs_errortag_attr_store(
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struct kobject *kobject,
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struct attribute *attr,
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const char *buf,
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size_t count)
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{
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struct xfs_mount *mp = to_mp(kobject);
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struct xfs_errortag_attr *xfs_attr = to_attr(attr);
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int ret;
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unsigned int val;
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if (strcmp(buf, "default") == 0) {
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val = xfs_errortag_random_default[xfs_attr->tag];
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} else {
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ret = kstrtouint(buf, 0, &val);
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if (ret)
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return ret;
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}
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ret = xfs_errortag_set(mp, xfs_attr->tag, val);
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if (ret)
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return ret;
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return count;
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}
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STATIC ssize_t
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xfs_errortag_attr_show(
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struct kobject *kobject,
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struct attribute *attr,
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char *buf)
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{
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struct xfs_mount *mp = to_mp(kobject);
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struct xfs_errortag_attr *xfs_attr = to_attr(attr);
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return snprintf(buf, PAGE_SIZE, "%u\n",
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xfs_errortag_get(mp, xfs_attr->tag));
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}
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static const struct sysfs_ops xfs_errortag_sysfs_ops = {
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.show = xfs_errortag_attr_show,
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.store = xfs_errortag_attr_store,
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};
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#define XFS_ERRORTAG_ATTR_RW(_name, _tag) \
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static struct xfs_errortag_attr xfs_errortag_attr_##_name = { \
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.attr = {.name = __stringify(_name), \
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.mode = VERIFY_OCTAL_PERMISSIONS(S_IWUSR | S_IRUGO) }, \
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.tag = (_tag), \
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}
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#define XFS_ERRORTAG_ATTR_LIST(_name) &xfs_errortag_attr_##_name.attr
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XFS_ERRORTAG_ATTR_RW(noerror, XFS_ERRTAG_NOERROR);
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XFS_ERRORTAG_ATTR_RW(iflush1, XFS_ERRTAG_IFLUSH_1);
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XFS_ERRORTAG_ATTR_RW(iflush2, XFS_ERRTAG_IFLUSH_2);
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XFS_ERRORTAG_ATTR_RW(iflush3, XFS_ERRTAG_IFLUSH_3);
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XFS_ERRORTAG_ATTR_RW(iflush4, XFS_ERRTAG_IFLUSH_4);
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XFS_ERRORTAG_ATTR_RW(iflush5, XFS_ERRTAG_IFLUSH_5);
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XFS_ERRORTAG_ATTR_RW(iflush6, XFS_ERRTAG_IFLUSH_6);
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XFS_ERRORTAG_ATTR_RW(dareadbuf, XFS_ERRTAG_DA_READ_BUF);
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XFS_ERRORTAG_ATTR_RW(btree_chk_lblk, XFS_ERRTAG_BTREE_CHECK_LBLOCK);
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XFS_ERRORTAG_ATTR_RW(btree_chk_sblk, XFS_ERRTAG_BTREE_CHECK_SBLOCK);
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XFS_ERRORTAG_ATTR_RW(readagf, XFS_ERRTAG_ALLOC_READ_AGF);
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XFS_ERRORTAG_ATTR_RW(readagi, XFS_ERRTAG_IALLOC_READ_AGI);
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XFS_ERRORTAG_ATTR_RW(itobp, XFS_ERRTAG_ITOBP_INOTOBP);
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XFS_ERRORTAG_ATTR_RW(iunlink, XFS_ERRTAG_IUNLINK);
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XFS_ERRORTAG_ATTR_RW(iunlinkrm, XFS_ERRTAG_IUNLINK_REMOVE);
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XFS_ERRORTAG_ATTR_RW(dirinovalid, XFS_ERRTAG_DIR_INO_VALIDATE);
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XFS_ERRORTAG_ATTR_RW(bulkstat, XFS_ERRTAG_BULKSTAT_READ_CHUNK);
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XFS_ERRORTAG_ATTR_RW(logiodone, XFS_ERRTAG_IODONE_IOERR);
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XFS_ERRORTAG_ATTR_RW(stratread, XFS_ERRTAG_STRATREAD_IOERR);
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XFS_ERRORTAG_ATTR_RW(stratcmpl, XFS_ERRTAG_STRATCMPL_IOERR);
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XFS_ERRORTAG_ATTR_RW(diowrite, XFS_ERRTAG_DIOWRITE_IOERR);
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XFS_ERRORTAG_ATTR_RW(bmapifmt, XFS_ERRTAG_BMAPIFORMAT);
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XFS_ERRORTAG_ATTR_RW(free_extent, XFS_ERRTAG_FREE_EXTENT);
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XFS_ERRORTAG_ATTR_RW(rmap_finish_one, XFS_ERRTAG_RMAP_FINISH_ONE);
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XFS_ERRORTAG_ATTR_RW(refcount_continue_update, XFS_ERRTAG_REFCOUNT_CONTINUE_UPDATE);
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XFS_ERRORTAG_ATTR_RW(refcount_finish_one, XFS_ERRTAG_REFCOUNT_FINISH_ONE);
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XFS_ERRORTAG_ATTR_RW(bmap_finish_one, XFS_ERRTAG_BMAP_FINISH_ONE);
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XFS_ERRORTAG_ATTR_RW(ag_resv_critical, XFS_ERRTAG_AG_RESV_CRITICAL);
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XFS_ERRORTAG_ATTR_RW(drop_writes, XFS_ERRTAG_DROP_WRITES);
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XFS_ERRORTAG_ATTR_RW(log_bad_crc, XFS_ERRTAG_LOG_BAD_CRC);
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static struct attribute *xfs_errortag_attrs[] = {
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XFS_ERRORTAG_ATTR_LIST(noerror),
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XFS_ERRORTAG_ATTR_LIST(iflush1),
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XFS_ERRORTAG_ATTR_LIST(iflush2),
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XFS_ERRORTAG_ATTR_LIST(iflush3),
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XFS_ERRORTAG_ATTR_LIST(iflush4),
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XFS_ERRORTAG_ATTR_LIST(iflush5),
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XFS_ERRORTAG_ATTR_LIST(iflush6),
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XFS_ERRORTAG_ATTR_LIST(dareadbuf),
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XFS_ERRORTAG_ATTR_LIST(btree_chk_lblk),
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XFS_ERRORTAG_ATTR_LIST(btree_chk_sblk),
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XFS_ERRORTAG_ATTR_LIST(readagf),
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XFS_ERRORTAG_ATTR_LIST(readagi),
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XFS_ERRORTAG_ATTR_LIST(itobp),
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XFS_ERRORTAG_ATTR_LIST(iunlink),
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XFS_ERRORTAG_ATTR_LIST(iunlinkrm),
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XFS_ERRORTAG_ATTR_LIST(dirinovalid),
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XFS_ERRORTAG_ATTR_LIST(bulkstat),
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XFS_ERRORTAG_ATTR_LIST(logiodone),
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XFS_ERRORTAG_ATTR_LIST(stratread),
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XFS_ERRORTAG_ATTR_LIST(stratcmpl),
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XFS_ERRORTAG_ATTR_LIST(diowrite),
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XFS_ERRORTAG_ATTR_LIST(bmapifmt),
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XFS_ERRORTAG_ATTR_LIST(free_extent),
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XFS_ERRORTAG_ATTR_LIST(rmap_finish_one),
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XFS_ERRORTAG_ATTR_LIST(refcount_continue_update),
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XFS_ERRORTAG_ATTR_LIST(refcount_finish_one),
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XFS_ERRORTAG_ATTR_LIST(bmap_finish_one),
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XFS_ERRORTAG_ATTR_LIST(ag_resv_critical),
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XFS_ERRORTAG_ATTR_LIST(drop_writes),
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XFS_ERRORTAG_ATTR_LIST(log_bad_crc),
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NULL,
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};
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struct kobj_type xfs_errortag_ktype = {
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.release = xfs_sysfs_release,
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.sysfs_ops = &xfs_errortag_sysfs_ops,
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.default_attrs = xfs_errortag_attrs,
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};
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int
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xfs_errortag_init(
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struct xfs_mount *mp)
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{
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mp->m_errortag = kmem_zalloc(sizeof(unsigned int) * XFS_ERRTAG_MAX,
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KM_SLEEP | KM_MAYFAIL);
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if (!mp->m_errortag)
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return -ENOMEM;
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return xfs_sysfs_init(&mp->m_errortag_kobj, &xfs_errortag_ktype,
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&mp->m_kobj, "errortag");
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}
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void
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xfs_errortag_del(
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struct xfs_mount *mp)
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{
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xfs_sysfs_del(&mp->m_errortag_kobj);
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kmem_free(mp->m_errortag);
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}
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bool
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xfs_errortag_test(
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struct xfs_mount *mp,
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const char *expression,
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const char *file,
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int line,
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unsigned int error_tag)
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{
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unsigned int randfactor;
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/*
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* To be able to use error injection anywhere, we need to ensure error
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* injection mechanism is already initialized.
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*
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* Code paths like I/O completion can be called before the
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* initialization is complete, but be able to inject errors in such
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* places is still useful.
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*/
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if (!mp->m_errortag)
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return false;
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ASSERT(error_tag < XFS_ERRTAG_MAX);
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randfactor = mp->m_errortag[error_tag];
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if (!randfactor || prandom_u32() % randfactor)
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return false;
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xfs_warn_ratelimited(mp,
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"Injecting error (%s) at file %s, line %d, on filesystem \"%s\"",
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expression, file, line, mp->m_fsname);
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return true;
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}
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int
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xfs_errortag_get(
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struct xfs_mount *mp,
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unsigned int error_tag)
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{
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if (error_tag >= XFS_ERRTAG_MAX)
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return -EINVAL;
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return mp->m_errortag[error_tag];
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}
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int
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xfs_errortag_set(
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struct xfs_mount *mp,
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unsigned int error_tag,
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unsigned int tag_value)
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{
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if (error_tag >= XFS_ERRTAG_MAX)
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return -EINVAL;
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mp->m_errortag[error_tag] = tag_value;
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return 0;
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}
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int
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xfs_errortag_add(
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struct xfs_mount *mp,
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unsigned int error_tag)
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{
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if (error_tag >= XFS_ERRTAG_MAX)
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return -EINVAL;
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return xfs_errortag_set(mp, error_tag,
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xfs_errortag_random_default[error_tag]);
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}
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int
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xfs_errortag_clearall(
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struct xfs_mount *mp)
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{
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memset(mp->m_errortag, 0, sizeof(unsigned int) * XFS_ERRTAG_MAX);
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return 0;
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}
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#endif /* DEBUG */
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void
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xfs_error_report(
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const char *tag,
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int level,
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struct xfs_mount *mp,
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const char *filename,
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int linenum,
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void *ra)
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{
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if (level <= xfs_error_level) {
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xfs_alert_tag(mp, XFS_PTAG_ERROR_REPORT,
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"Internal error %s at line %d of file %s. Caller %pS",
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tag, linenum, filename, ra);
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xfs_stack_trace();
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}
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}
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void
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xfs_corruption_error(
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const char *tag,
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int level,
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struct xfs_mount *mp,
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void *p,
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const char *filename,
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int linenum,
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void *ra)
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{
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if (level <= xfs_error_level)
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xfs_hex_dump(p, 64);
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xfs_error_report(tag, level, mp, filename, linenum, ra);
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xfs_alert(mp, "Corruption detected. Unmount and run xfs_repair");
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}
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/*
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* Warnings specifically for verifier errors. Differentiate CRC vs. invalid
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* values, and omit the stack trace unless the error level is tuned high.
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*/
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void
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xfs_verifier_error(
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struct xfs_buf *bp)
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{
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struct xfs_mount *mp = bp->b_target->bt_mount;
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xfs_alert(mp, "Metadata %s detected at %pF, %s block 0x%llx",
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bp->b_error == -EFSBADCRC ? "CRC error" : "corruption",
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__return_address, bp->b_ops->name, bp->b_bn);
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xfs_alert(mp, "Unmount and run xfs_repair");
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if (xfs_error_level >= XFS_ERRLEVEL_LOW) {
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xfs_alert(mp, "First 64 bytes of corrupted metadata buffer:");
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xfs_hex_dump(xfs_buf_offset(bp, 0), 64);
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}
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if (xfs_error_level >= XFS_ERRLEVEL_HIGH)
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xfs_stack_trace();
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}
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