korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-12-23 11:04:44 +08:00
Code Issues Packages Projects Releases Wiki Activity
84c679f5f5
linux/fs/xfs/scrub/quota.c
Darrick J. Wong 026f57ebe1 xfs: get rid of the ip parameter to xchk_setup_* 
Now that the scrub context stores a pointer to the file that was used to
invoke the scrub call, the struct xfs_inode pointer that we passed to
all the setup functions is no longer necessary.  This is only ever used
if the caller wants us to scrub the metadata of the open file.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Chandan Babu R <chandanrlinux@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
2021-04-09 10:27:18 -07:00

249 lines
6.3 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2017 Oracle. All Rights Reserved.
* Author: Darrick J. Wong <darrick.wong@oracle.com>
*/
#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_log_format.h"
#include "xfs_trans.h"
#include "xfs_inode.h"
#include "xfs_quota.h"
#include "xfs_qm.h"
#include "scrub/scrub.h"
#include "scrub/common.h"
/* Convert a scrub type code to a DQ flag, or return 0 if error. */
static inline xfs_dqtype_t
xchk_quota_to_dqtype(
struct xfs_scrub *sc)
{
switch (sc->sm->sm_type) {
case XFS_SCRUB_TYPE_UQUOTA:
return XFS_DQTYPE_USER;
case XFS_SCRUB_TYPE_GQUOTA:
return XFS_DQTYPE_GROUP;
case XFS_SCRUB_TYPE_PQUOTA:
return XFS_DQTYPE_PROJ;
default:
return 0;
}
}
/* Set us up to scrub a quota. */
int
xchk_setup_quota(
struct xfs_scrub *sc)
{
xfs_dqtype_t dqtype;
int error;
if (!XFS_IS_QUOTA_RUNNING(sc->mp) || !XFS_IS_QUOTA_ON(sc->mp))
return -ENOENT;
dqtype = xchk_quota_to_dqtype(sc);
if (dqtype == 0)
return -EINVAL;
sc->flags |= XCHK_HAS_QUOTAOFFLOCK;
mutex_lock(&sc->mp->m_quotainfo->qi_quotaofflock);
if (!xfs_this_quota_on(sc->mp, dqtype))
return -ENOENT;
error = xchk_setup_fs(sc);
if (error)
return error;
sc->ip = xfs_quota_inode(sc->mp, dqtype);
xfs_ilock(sc->ip, XFS_ILOCK_EXCL);
sc->ilock_flags = XFS_ILOCK_EXCL;
return 0;
}
/* Quotas. */
struct xchk_quota_info {
struct xfs_scrub *sc;
xfs_dqid_t last_id;
};
/* Scrub the fields in an individual quota item. */
STATIC int
xchk_quota_item(
struct xfs_dquot *dq,
xfs_dqtype_t dqtype,
void *priv)
{
struct xchk_quota_info *sqi = priv;
struct xfs_scrub *sc = sqi->sc;
struct xfs_mount *mp = sc->mp;
struct xfs_quotainfo *qi = mp->m_quotainfo;
xfs_fileoff_t offset;
xfs_ino_t fs_icount;
int error = 0;
if (xchk_should_terminate(sc, &error))
return -ECANCELED;
/*
* Except for the root dquot, the actual dquot we got must either have
* the same or higher id as we saw before.
*/
offset = dq->q_id / qi->qi_dqperchunk;
if (dq->q_id && dq->q_id <= sqi->last_id)
xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
sqi->last_id = dq->q_id;
/*
* Warn if the hard limits are larger than the fs.
* Administrators can do this, though in production this seems
* suspect, which is why we flag it for review.
*
* Complain about corruption if the soft limit is greater than
* the hard limit.
*/
if (dq->q_blk.hardlimit > mp->m_sb.sb_dblocks)
xchk_fblock_set_warning(sc, XFS_DATA_FORK, offset);
if (dq->q_blk.softlimit > dq->q_blk.hardlimit)
xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
if (dq->q_ino.hardlimit > M_IGEO(mp)->maxicount)
xchk_fblock_set_warning(sc, XFS_DATA_FORK, offset);
if (dq->q_ino.softlimit > dq->q_ino.hardlimit)
xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
if (dq->q_rtb.hardlimit > mp->m_sb.sb_rblocks)
xchk_fblock_set_warning(sc, XFS_DATA_FORK, offset);
if (dq->q_rtb.softlimit > dq->q_rtb.hardlimit)
xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
/* Check the resource counts. */
fs_icount = percpu_counter_sum(&mp->m_icount);
/*
* Check that usage doesn't exceed physical limits. However, on
* a reflink filesystem we're allowed to exceed physical space
* if there are no quota limits.
*/
if (xfs_sb_version_hasreflink(&mp->m_sb)) {
if (mp->m_sb.sb_dblocks < dq->q_blk.count)
xchk_fblock_set_warning(sc, XFS_DATA_FORK,
offset);
} else {
if (mp->m_sb.sb_dblocks < dq->q_blk.count)
xchk_fblock_set_corrupt(sc, XFS_DATA_FORK,
offset);
}
if (dq->q_ino.count > fs_icount || dq->q_rtb.count > mp->m_sb.sb_rblocks)
xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
/*
* We can violate the hard limits if the admin suddenly sets a
* lower limit than the actual usage. However, we flag it for
* admin review.
*/
if (dq->q_id == 0)
goto out;
if (dq->q_blk.hardlimit != 0 &&
dq->q_blk.count > dq->q_blk.hardlimit)
xchk_fblock_set_warning(sc, XFS_DATA_FORK, offset);
if (dq->q_ino.hardlimit != 0 &&
dq->q_ino.count > dq->q_ino.hardlimit)
xchk_fblock_set_warning(sc, XFS_DATA_FORK, offset);
if (dq->q_rtb.hardlimit != 0 &&
dq->q_rtb.count > dq->q_rtb.hardlimit)
xchk_fblock_set_warning(sc, XFS_DATA_FORK, offset);
out:
if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
return -ECANCELED;
return 0;
}
/* Check the quota's data fork. */
STATIC int
xchk_quota_data_fork(
struct xfs_scrub *sc)
{
struct xfs_bmbt_irec irec = { 0 };
struct xfs_iext_cursor icur;
struct xfs_quotainfo *qi = sc->mp->m_quotainfo;
struct xfs_ifork *ifp;
xfs_fileoff_t max_dqid_off;
int error = 0;
/* Invoke the fork scrubber. */
error = xchk_metadata_inode_forks(sc);
if (error || (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT))
return error;
/* Check for data fork problems that apply only to quota files. */
max_dqid_off = ((xfs_dqid_t)-1) / qi->qi_dqperchunk;
ifp = XFS_IFORK_PTR(sc->ip, XFS_DATA_FORK);
for_each_xfs_iext(ifp, &icur, &irec) {
if (xchk_should_terminate(sc, &error))
break;
/*
* delalloc extents or blocks mapped above the highest
* quota id shouldn't happen.
*/
if (isnullstartblock(irec.br_startblock) ||
irec.br_startoff > max_dqid_off ||
irec.br_startoff + irec.br_blockcount - 1 > max_dqid_off) {
xchk_fblock_set_corrupt(sc, XFS_DATA_FORK,
irec.br_startoff);
break;
}
}
return error;
}
/* Scrub all of a quota type's items. */
int
xchk_quota(
struct xfs_scrub *sc)
{
struct xchk_quota_info sqi;
struct xfs_mount *mp = sc->mp;
struct xfs_quotainfo *qi = mp->m_quotainfo;
xfs_dqtype_t dqtype;
int error = 0;
dqtype = xchk_quota_to_dqtype(sc);
/* Look for problem extents. */
error = xchk_quota_data_fork(sc);
if (error)
goto out;
if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
goto out;
/*
* Check all the quota items. Now that we've checked the quota inode
* data fork we have to drop ILOCK_EXCL to use the regular dquot
* functions.
*/
xfs_iunlock(sc->ip, sc->ilock_flags);
sc->ilock_flags = 0;
sqi.sc = sc;
sqi.last_id = 0;
error = xfs_qm_dqiterate(mp, dqtype, xchk_quota_item, &sqi);
sc->ilock_flags = XFS_ILOCK_EXCL;
xfs_ilock(sc->ip, sc->ilock_flags);
if (error == -ECANCELED)
error = 0;
if (!xchk_fblock_process_error(sc, XFS_DATA_FORK,
sqi.last_id * qi->qi_dqperchunk, &error))
goto out;
out:
return error;
}
Reference in New Issue View Git Blame Copy Permalink