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517 lines
13 KiB
517 lines
13 KiB
// 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); |
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/* Inodes */ |
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hard = (newlim->d_fieldmask & QC_INO_HARD) ? |
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(xfs_qcnt_t) newlim->d_ino_hardlimit : |
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dqp->q_ino.hardlimit; |
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soft = (newlim->d_fieldmask & QC_INO_SOFT) ? |
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(xfs_qcnt_t) newlim->d_ino_softlimit : |
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dqp->q_ino.softlimit; |
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res = &dqp->q_ino; |
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qlim = id == 0 ? &defq->ino : NULL; |
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xfs_setqlim_limits(mp, res, qlim, hard, soft, "ino"); |
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if (newlim->d_fieldmask & QC_INO_TIMER) |
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xfs_setqlim_timer(mp, res, qlim, newlim->d_ino_timer); |
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if (id != 0) { |
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/* |
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* If the user is now over quota, start the timelimit. |
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* The user will not be 'warned'. |
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* Note that we keep the timers ticking, whether enforcement |
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* is on or off. We don't really want to bother with iterating |
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* over all ondisk dquots and turning the timers on/off. |
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*/ |
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xfs_qm_adjust_dqtimers(dqp); |
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} |
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dqp->q_flags |= XFS_DQFLAG_DIRTY; |
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xfs_trans_log_dquot(tp, dqp); |
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error = xfs_trans_commit(tp); |
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out_rele: |
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xfs_qm_dqrele(dqp); |
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return error; |
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} |
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/* Fill out the quota context. */ |
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static void |
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xfs_qm_scall_getquota_fill_qc( |
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struct xfs_mount *mp, |
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xfs_dqtype_t type, |
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const struct xfs_dquot *dqp, |
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struct qc_dqblk *dst) |
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{ |
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memset(dst, 0, sizeof(*dst)); |
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dst->d_spc_hardlimit = XFS_FSB_TO_B(mp, dqp->q_blk.hardlimit); |
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dst->d_spc_softlimit = XFS_FSB_TO_B(mp, dqp->q_blk.softlimit); |
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dst->d_ino_hardlimit = dqp->q_ino.hardlimit; |
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dst->d_ino_softlimit = dqp->q_ino.softlimit; |
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dst->d_space = XFS_FSB_TO_B(mp, dqp->q_blk.reserved); |
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dst->d_ino_count = dqp->q_ino.reserved; |
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dst->d_spc_timer = dqp->q_blk.timer; |
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dst->d_ino_timer = dqp->q_ino.timer; |
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dst->d_ino_warns = 0; |
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dst->d_spc_warns = 0; |
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dst->d_rt_spc_hardlimit = XFS_FSB_TO_B(mp, dqp->q_rtb.hardlimit); |
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dst->d_rt_spc_softlimit = XFS_FSB_TO_B(mp, dqp->q_rtb.softlimit); |
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dst->d_rt_space = XFS_FSB_TO_B(mp, dqp->q_rtb.reserved); |
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dst->d_rt_spc_timer = dqp->q_rtb.timer; |
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dst->d_rt_spc_warns = 0; |
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/* |
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* Internally, we don't reset all the timers when quota enforcement |
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* gets turned off. No need to confuse the user level code, |
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* so return zeroes in that case. |
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*/ |
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if (!xfs_dquot_is_enforced(dqp)) { |
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dst->d_spc_timer = 0; |
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dst->d_ino_timer = 0; |
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dst->d_rt_spc_timer = 0; |
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} |
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#ifdef DEBUG |
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if (xfs_dquot_is_enforced(dqp) && dqp->q_id != 0) { |
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if ((dst->d_space > dst->d_spc_softlimit) && |
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(dst->d_spc_softlimit > 0)) { |
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ASSERT(dst->d_spc_timer != 0); |
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} |
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if ((dst->d_ino_count > dqp->q_ino.softlimit) && |
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(dqp->q_ino.softlimit > 0)) { |
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ASSERT(dst->d_ino_timer != 0); |
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} |
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} |
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#endif |
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} |
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/* Return the quota information for the dquot matching id. */ |
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int |
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xfs_qm_scall_getquota( |
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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 *dst) |
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{ |
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struct xfs_dquot *dqp; |
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int error; |
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|
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/* |
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* Expedite pending inodegc work at the start of a quota reporting |
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* scan but don't block waiting for it to complete. |
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*/ |
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if (id == 0) |
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xfs_inodegc_push(mp); |
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|
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/* |
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* Try to get the dquot. We don't want it allocated on disk, so don't |
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* set doalloc. If it doesn't exist, we'll get ENOENT back. |
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*/ |
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error = xfs_qm_dqget(mp, id, type, false, &dqp); |
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if (error) |
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return error; |
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|
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/* |
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* If everything's NULL, this dquot doesn't quite exist as far as |
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* our utility programs are concerned. |
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*/ |
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if (XFS_IS_DQUOT_UNINITIALIZED(dqp)) { |
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error = -ENOENT; |
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goto out_put; |
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} |
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xfs_qm_scall_getquota_fill_qc(mp, type, dqp, dst); |
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out_put: |
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xfs_qm_dqput(dqp); |
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return error; |
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} |
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|
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/* |
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* Return the quota information for the first initialized dquot whose id |
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* is at least as high as id. |
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*/ |
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int |
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xfs_qm_scall_getquota_next( |
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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 *dst) |
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{ |
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struct xfs_dquot *dqp; |
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int error; |
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|
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/* Flush inodegc work at the start of a quota reporting scan. */ |
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if (*id == 0) |
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xfs_inodegc_push(mp); |
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error = xfs_qm_dqget_next(mp, *id, type, &dqp); |
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if (error) |
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return error; |
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|
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/* Fill in the ID we actually read from disk */ |
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*id = dqp->q_id; |
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xfs_qm_scall_getquota_fill_qc(mp, type, dqp, dst); |
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|
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xfs_qm_dqput(dqp); |
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return error; |
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}
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