518 lines
13 KiB
C
518 lines
13 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2000-2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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*/
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#include "xfs.h"
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#include "xfs_fs.h"
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#include "xfs_shared.h"
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#include "xfs_format.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_sb.h"
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#include "xfs_mount.h"
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#include "xfs_inode.h"
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#include "xfs_trans.h"
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#include "xfs_quota.h"
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#include "xfs_qm.h"
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#include "xfs_icache.h"
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int
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xfs_qm_scall_quotaoff(
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xfs_mount_t *mp,
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uint flags)
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{
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/*
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* No file system can have quotas enabled on disk but not in core.
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* Note that quota utilities (like quotaoff) _expect_
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* errno == -EEXIST here.
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*/
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if ((mp->m_qflags & flags) == 0)
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return -EEXIST;
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/*
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* We do not support actually turning off quota accounting any more.
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* Just log a warning and ignore the accounting related flags.
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*/
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if (flags & XFS_ALL_QUOTA_ACCT)
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xfs_info(mp, "disabling of quota accounting not supported.");
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mutex_lock(&mp->m_quotainfo->qi_quotaofflock);
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mp->m_qflags &= ~(flags & XFS_ALL_QUOTA_ENFD);
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spin_lock(&mp->m_sb_lock);
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mp->m_sb.sb_qflags = mp->m_qflags;
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spin_unlock(&mp->m_sb_lock);
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mutex_unlock(&mp->m_quotainfo->qi_quotaofflock);
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/* XXX what to do if error ? Revert back to old vals incore ? */
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return xfs_sync_sb(mp, false);
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}
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STATIC int
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xfs_qm_scall_trunc_qfile(
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struct xfs_mount *mp,
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xfs_ino_t ino)
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{
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struct xfs_inode *ip;
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struct xfs_trans *tp;
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int error;
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if (ino == NULLFSINO)
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return 0;
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error = xfs_iget(mp, NULL, ino, 0, 0, &ip);
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if (error)
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return error;
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xfs_ilock(ip, XFS_IOLOCK_EXCL);
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error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 0, 0, 0, &tp);
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if (error) {
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xfs_iunlock(ip, XFS_IOLOCK_EXCL);
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goto out_put;
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}
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xfs_ilock(ip, XFS_ILOCK_EXCL);
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xfs_trans_ijoin(tp, ip, 0);
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ip->i_disk_size = 0;
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xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
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error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, 0);
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if (error) {
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xfs_trans_cancel(tp);
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goto out_unlock;
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}
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ASSERT(ip->i_df.if_nextents == 0);
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xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
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error = xfs_trans_commit(tp);
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out_unlock:
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xfs_iunlock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
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out_put:
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xfs_irele(ip);
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return error;
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}
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int
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xfs_qm_scall_trunc_qfiles(
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xfs_mount_t *mp,
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uint flags)
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{
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int error = -EINVAL;
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if (!xfs_has_quota(mp) || flags == 0 ||
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(flags & ~XFS_QMOPT_QUOTALL)) {
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xfs_debug(mp, "%s: flags=%x m_qflags=%x",
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__func__, flags, mp->m_qflags);
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return -EINVAL;
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}
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if (flags & XFS_QMOPT_UQUOTA) {
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error = xfs_qm_scall_trunc_qfile(mp, mp->m_sb.sb_uquotino);
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if (error)
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return error;
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}
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if (flags & XFS_QMOPT_GQUOTA) {
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error = xfs_qm_scall_trunc_qfile(mp, mp->m_sb.sb_gquotino);
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if (error)
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return error;
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}
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if (flags & XFS_QMOPT_PQUOTA)
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error = xfs_qm_scall_trunc_qfile(mp, mp->m_sb.sb_pquotino);
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return error;
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}
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/*
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* Switch on (a given) quota enforcement for a filesystem. This takes
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* effect immediately.
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* (Switching on quota accounting must be done at mount time.)
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*/
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int
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xfs_qm_scall_quotaon(
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xfs_mount_t *mp,
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uint flags)
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{
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int error;
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uint qf;
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/*
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* Switching on quota accounting must be done at mount time,
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* only consider quota enforcement stuff here.
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*/
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flags &= XFS_ALL_QUOTA_ENFD;
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if (flags == 0) {
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xfs_debug(mp, "%s: zero flags, m_qflags=%x",
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__func__, mp->m_qflags);
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return -EINVAL;
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}
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/*
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* Can't enforce without accounting. We check the superblock
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* qflags here instead of m_qflags because rootfs can have
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* quota acct on ondisk without m_qflags' knowing.
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*/
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if (((mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT) == 0 &&
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(flags & XFS_UQUOTA_ENFD)) ||
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((mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT) == 0 &&
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(flags & XFS_GQUOTA_ENFD)) ||
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((mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT) == 0 &&
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(flags & XFS_PQUOTA_ENFD))) {
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xfs_debug(mp,
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"%s: Can't enforce without acct, flags=%x sbflags=%x",
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__func__, flags, mp->m_sb.sb_qflags);
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return -EINVAL;
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}
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/*
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* If everything's up to-date incore, then don't waste time.
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*/
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if ((mp->m_qflags & flags) == flags)
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return -EEXIST;
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/*
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* Change sb_qflags on disk but not incore mp->qflags
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* if this is the root filesystem.
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*/
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spin_lock(&mp->m_sb_lock);
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qf = mp->m_sb.sb_qflags;
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mp->m_sb.sb_qflags = qf | flags;
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spin_unlock(&mp->m_sb_lock);
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/*
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* There's nothing to change if it's the same.
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*/
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if ((qf & flags) == flags)
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return -EEXIST;
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error = xfs_sync_sb(mp, false);
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if (error)
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return error;
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/*
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* If we aren't trying to switch on quota enforcement, we are done.
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*/
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if (((mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT) !=
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(mp->m_qflags & XFS_UQUOTA_ACCT)) ||
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((mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT) !=
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(mp->m_qflags & XFS_PQUOTA_ACCT)) ||
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((mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT) !=
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(mp->m_qflags & XFS_GQUOTA_ACCT)))
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return 0;
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if (!XFS_IS_QUOTA_ON(mp))
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return -ESRCH;
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/*
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* Switch on quota enforcement in core.
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*/
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mutex_lock(&mp->m_quotainfo->qi_quotaofflock);
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mp->m_qflags |= (flags & XFS_ALL_QUOTA_ENFD);
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mutex_unlock(&mp->m_quotainfo->qi_quotaofflock);
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return 0;
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}
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#define XFS_QC_MASK (QC_LIMIT_MASK | QC_TIMER_MASK)
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/*
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* Adjust limits of this quota, and the defaults if passed in. Returns true
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* if the new limits made sense and were applied, false otherwise.
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*/
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static inline bool
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xfs_setqlim_limits(
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struct xfs_mount *mp,
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struct xfs_dquot_res *res,
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struct xfs_quota_limits *qlim,
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xfs_qcnt_t hard,
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xfs_qcnt_t soft,
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const char *tag)
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{
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/* The hard limit can't be less than the soft limit. */
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if (hard != 0 && hard < soft) {
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xfs_debug(mp, "%shard %lld < %ssoft %lld", tag, hard, tag,
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soft);
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return false;
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}
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res->hardlimit = hard;
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res->softlimit = soft;
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if (qlim) {
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qlim->hard = hard;
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qlim->soft = soft;
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}
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return true;
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}
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static inline void
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xfs_setqlim_timer(
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struct xfs_mount *mp,
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struct xfs_dquot_res *res,
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struct xfs_quota_limits *qlim,
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s64 timer)
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{
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if (qlim) {
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/* Set the length of the default grace period. */
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res->timer = xfs_dquot_set_grace_period(timer);
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qlim->time = res->timer;
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} else {
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/* Set the grace period expiration on a quota. */
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res->timer = xfs_dquot_set_timeout(mp, timer);
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}
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}
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/*
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* Adjust quota limits, and start/stop timers accordingly.
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*/
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int
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xfs_qm_scall_setqlim(
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struct xfs_mount *mp,
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xfs_dqid_t id,
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xfs_dqtype_t type,
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struct qc_dqblk *newlim)
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{
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struct xfs_quotainfo *q = mp->m_quotainfo;
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struct xfs_dquot *dqp;
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struct xfs_trans *tp;
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struct xfs_def_quota *defq;
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struct xfs_dquot_res *res;
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struct xfs_quota_limits *qlim;
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int error;
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xfs_qcnt_t hard, soft;
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if (newlim->d_fieldmask & ~XFS_QC_MASK)
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return -EINVAL;
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if ((newlim->d_fieldmask & XFS_QC_MASK) == 0)
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return 0;
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/*
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* Get the dquot (locked) before we start, as we need to do a
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* transaction to allocate it if it doesn't exist. Once we have the
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* dquot, unlock it so we can start the next transaction safely. We hold
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* a reference to the dquot, so it's safe to do this unlock/lock without
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* it being reclaimed in the mean time.
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*/
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error = xfs_qm_dqget(mp, id, type, true, &dqp);
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if (error) {
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ASSERT(error != -ENOENT);
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return error;
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}
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defq = xfs_get_defquota(q, xfs_dquot_type(dqp));
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xfs_dqunlock(dqp);
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error = xfs_trans_alloc(mp, &M_RES(mp)->tr_qm_setqlim, 0, 0, 0, &tp);
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if (error)
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goto out_rele;
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xfs_dqlock(dqp);
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xfs_trans_dqjoin(tp, dqp);
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/*
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* Update quota limits, warnings, and timers, and the defaults
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* if we're touching id == 0.
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*
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* Make sure that hardlimits are >= soft limits before changing.
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*
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* Update warnings counter(s) if requested.
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*
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* Timelimits for the super user set the relative time the other users
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* can be over quota for this file system. If it is zero a default is
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* used. Ditto for the default soft and hard limit values (already
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* done, above), and for warnings.
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*
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* For other IDs, userspace can bump out the grace period if over
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* the soft limit.
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*/
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/* Blocks on the data device. */
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hard = (newlim->d_fieldmask & QC_SPC_HARD) ?
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(xfs_qcnt_t) XFS_B_TO_FSB(mp, newlim->d_spc_hardlimit) :
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dqp->q_blk.hardlimit;
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soft = (newlim->d_fieldmask & QC_SPC_SOFT) ?
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(xfs_qcnt_t) XFS_B_TO_FSB(mp, newlim->d_spc_softlimit) :
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dqp->q_blk.softlimit;
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res = &dqp->q_blk;
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qlim = id == 0 ? &defq->blk : NULL;
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if (xfs_setqlim_limits(mp, res, qlim, hard, soft, "blk"))
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xfs_dquot_set_prealloc_limits(dqp);
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if (newlim->d_fieldmask & QC_SPC_TIMER)
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xfs_setqlim_timer(mp, res, qlim, newlim->d_spc_timer);
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/* Blocks on the realtime device. */
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hard = (newlim->d_fieldmask & QC_RT_SPC_HARD) ?
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(xfs_qcnt_t) XFS_B_TO_FSB(mp, newlim->d_rt_spc_hardlimit) :
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dqp->q_rtb.hardlimit;
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soft = (newlim->d_fieldmask & QC_RT_SPC_SOFT) ?
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(xfs_qcnt_t) XFS_B_TO_FSB(mp, newlim->d_rt_spc_softlimit) :
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dqp->q_rtb.softlimit;
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res = &dqp->q_rtb;
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qlim = id == 0 ? &defq->rtb : NULL;
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xfs_setqlim_limits(mp, res, qlim, hard, soft, "rtb");
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if (newlim->d_fieldmask & QC_RT_SPC_TIMER)
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xfs_setqlim_timer(mp, res, qlim, newlim->d_rt_spc_timer);
|
||
|
|
|
||
|
|
/* Inodes */
|
||
|
|
hard = (newlim->d_fieldmask & QC_INO_HARD) ?
|
||
|
|
(xfs_qcnt_t) newlim->d_ino_hardlimit :
|
||
|
|
dqp->q_ino.hardlimit;
|
||
|
|
soft = (newlim->d_fieldmask & QC_INO_SOFT) ?
|
||
|
|
(xfs_qcnt_t) newlim->d_ino_softlimit :
|
||
|
|
dqp->q_ino.softlimit;
|
||
|
|
res = &dqp->q_ino;
|
||
|
|
qlim = id == 0 ? &defq->ino : NULL;
|
||
|
|
|
||
|
|
xfs_setqlim_limits(mp, res, qlim, hard, soft, "ino");
|
||
|
|
if (newlim->d_fieldmask & QC_INO_TIMER)
|
||
|
|
xfs_setqlim_timer(mp, res, qlim, newlim->d_ino_timer);
|
||
|
|
|
||
|
|
if (id != 0) {
|
||
|
|
/*
|
||
|
|
* If the user is now over quota, start the timelimit.
|
||
|
|
* The user will not be 'warned'.
|
||
|
|
* Note that we keep the timers ticking, whether enforcement
|
||
|
|
* is on or off. We don't really want to bother with iterating
|
||
|
|
* over all ondisk dquots and turning the timers on/off.
|
||
|
|
*/
|
||
|
|
xfs_qm_adjust_dqtimers(dqp);
|
||
|
|
}
|
||
|
|
dqp->q_flags |= XFS_DQFLAG_DIRTY;
|
||
|
|
xfs_trans_log_dquot(tp, dqp);
|
||
|
|
|
||
|
|
error = xfs_trans_commit(tp);
|
||
|
|
|
||
|
|
out_rele:
|
||
|
|
xfs_qm_dqrele(dqp);
|
||
|
|
return error;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Fill out the quota context. */
|
||
|
|
static void
|
||
|
|
xfs_qm_scall_getquota_fill_qc(
|
||
|
|
struct xfs_mount *mp,
|
||
|
|
xfs_dqtype_t type,
|
||
|
|
const struct xfs_dquot *dqp,
|
||
|
|
struct qc_dqblk *dst)
|
||
|
|
{
|
||
|
|
memset(dst, 0, sizeof(*dst));
|
||
|
|
dst->d_spc_hardlimit = XFS_FSB_TO_B(mp, dqp->q_blk.hardlimit);
|
||
|
|
dst->d_spc_softlimit = XFS_FSB_TO_B(mp, dqp->q_blk.softlimit);
|
||
|
|
dst->d_ino_hardlimit = dqp->q_ino.hardlimit;
|
||
|
|
dst->d_ino_softlimit = dqp->q_ino.softlimit;
|
||
|
|
dst->d_space = XFS_FSB_TO_B(mp, dqp->q_blk.reserved);
|
||
|
|
dst->d_ino_count = dqp->q_ino.reserved;
|
||
|
|
dst->d_spc_timer = dqp->q_blk.timer;
|
||
|
|
dst->d_ino_timer = dqp->q_ino.timer;
|
||
|
|
dst->d_ino_warns = 0;
|
||
|
|
dst->d_spc_warns = 0;
|
||
|
|
dst->d_rt_spc_hardlimit = XFS_FSB_TO_B(mp, dqp->q_rtb.hardlimit);
|
||
|
|
dst->d_rt_spc_softlimit = XFS_FSB_TO_B(mp, dqp->q_rtb.softlimit);
|
||
|
|
dst->d_rt_space = XFS_FSB_TO_B(mp, dqp->q_rtb.reserved);
|
||
|
|
dst->d_rt_spc_timer = dqp->q_rtb.timer;
|
||
|
|
dst->d_rt_spc_warns = 0;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Internally, we don't reset all the timers when quota enforcement
|
||
|
|
* gets turned off. No need to confuse the user level code,
|
||
|
|
* so return zeroes in that case.
|
||
|
|
*/
|
||
|
|
if (!xfs_dquot_is_enforced(dqp)) {
|
||
|
|
dst->d_spc_timer = 0;
|
||
|
|
dst->d_ino_timer = 0;
|
||
|
|
dst->d_rt_spc_timer = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
#ifdef DEBUG
|
||
|
|
if (xfs_dquot_is_enforced(dqp) && dqp->q_id != 0) {
|
||
|
|
if ((dst->d_space > dst->d_spc_softlimit) &&
|
||
|
|
(dst->d_spc_softlimit > 0)) {
|
||
|
|
ASSERT(dst->d_spc_timer != 0);
|
||
|
|
}
|
||
|
|
if ((dst->d_ino_count > dqp->q_ino.softlimit) &&
|
||
|
|
(dqp->q_ino.softlimit > 0)) {
|
||
|
|
ASSERT(dst->d_ino_timer != 0);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Return the quota information for the dquot matching id. */
|
||
|
|
int
|
||
|
|
xfs_qm_scall_getquota(
|
||
|
|
struct xfs_mount *mp,
|
||
|
|
xfs_dqid_t id,
|
||
|
|
xfs_dqtype_t type,
|
||
|
|
struct qc_dqblk *dst)
|
||
|
|
{
|
||
|
|
struct xfs_dquot *dqp;
|
||
|
|
int error;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Expedite pending inodegc work at the start of a quota reporting
|
||
|
|
* scan but don't block waiting for it to complete.
|
||
|
|
*/
|
||
|
|
if (id == 0)
|
||
|
|
xfs_inodegc_push(mp);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Try to get the dquot. We don't want it allocated on disk, so don't
|
||
|
|
* set doalloc. If it doesn't exist, we'll get ENOENT back.
|
||
|
|
*/
|
||
|
|
error = xfs_qm_dqget(mp, id, type, false, &dqp);
|
||
|
|
if (error)
|
||
|
|
return error;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* If everything's NULL, this dquot doesn't quite exist as far as
|
||
|
|
* our utility programs are concerned.
|
||
|
|
*/
|
||
|
|
if (XFS_IS_DQUOT_UNINITIALIZED(dqp)) {
|
||
|
|
error = -ENOENT;
|
||
|
|
goto out_put;
|
||
|
|
}
|
||
|
|
|
||
|
|
xfs_qm_scall_getquota_fill_qc(mp, type, dqp, dst);
|
||
|
|
|
||
|
|
out_put:
|
||
|
|
xfs_qm_dqput(dqp);
|
||
|
|
return error;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Return the quota information for the first initialized dquot whose id
|
||
|
|
* is at least as high as id.
|
||
|
|
*/
|
||
|
|
int
|
||
|
|
xfs_qm_scall_getquota_next(
|
||
|
|
struct xfs_mount *mp,
|
||
|
|
xfs_dqid_t *id,
|
||
|
|
xfs_dqtype_t type,
|
||
|
|
struct qc_dqblk *dst)
|
||
|
|
{
|
||
|
|
struct xfs_dquot *dqp;
|
||
|
|
int error;
|
||
|
|
|
||
|
|
/* Flush inodegc work at the start of a quota reporting scan. */
|
||
|
|
if (*id == 0)
|
||
|
|
xfs_inodegc_push(mp);
|
||
|
|
|
||
|
|
error = xfs_qm_dqget_next(mp, *id, type, &dqp);
|
||
|
|
if (error)
|
||
|
|
return error;
|
||
|
|
|
||
|
|
/* Fill in the ID we actually read from disk */
|
||
|
|
*id = dqp->q_id;
|
||
|
|
|
||
|
|
xfs_qm_scall_getquota_fill_qc(mp, type, dqp, dst);
|
||
|
|
|
||
|
|
xfs_qm_dqput(dqp);
|
||
|
|
return error;
|
||
|
|
}
|