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On the data device, calling statvfs on a projinherit directory results in the block and avail counts being curtailed to the project quota block limits, if any are set. Do the same for realtime files or directories, only use the project quota rt block limits. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de>
162 lines
4.2 KiB
C
162 lines
4.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2000-2006 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_mount.h"
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#include "xfs_quota.h"
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#include "xfs_inode.h"
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#include "xfs_trans.h"
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#include "xfs_qm.h"
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STATIC void
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xfs_fill_statvfs_from_dquot(
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struct kstatfs *statp,
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struct xfs_inode *ip,
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struct xfs_dquot *dqp)
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{
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struct xfs_dquot_res *blkres = &dqp->q_blk;
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uint64_t limit;
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if (XFS_IS_REALTIME_MOUNT(ip->i_mount) &&
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(ip->i_diflags & (XFS_DIFLAG_RTINHERIT | XFS_DIFLAG_REALTIME)))
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blkres = &dqp->q_rtb;
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limit = blkres->softlimit ?
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blkres->softlimit :
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blkres->hardlimit;
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if (limit && statp->f_blocks > limit) {
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statp->f_blocks = limit;
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statp->f_bfree = statp->f_bavail =
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(statp->f_blocks > blkres->reserved) ?
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(statp->f_blocks - blkres->reserved) : 0;
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}
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limit = dqp->q_ino.softlimit ?
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dqp->q_ino.softlimit :
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dqp->q_ino.hardlimit;
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if (limit && statp->f_files > limit) {
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statp->f_files = limit;
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statp->f_ffree =
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(statp->f_files > dqp->q_ino.reserved) ?
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(statp->f_files - dqp->q_ino.reserved) : 0;
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}
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}
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/*
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* Directory tree accounting is implemented using project quotas, where
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* the project identifier is inherited from parent directories.
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* A statvfs (df, etc.) of a directory that is using project quota should
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* return a statvfs of the project, not the entire filesystem.
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* This makes such trees appear as if they are filesystems in themselves.
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*/
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void
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xfs_qm_statvfs(
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struct xfs_inode *ip,
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struct kstatfs *statp)
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{
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struct xfs_mount *mp = ip->i_mount;
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struct xfs_dquot *dqp;
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if (!xfs_qm_dqget(mp, ip->i_projid, XFS_DQTYPE_PROJ, false, &dqp)) {
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xfs_fill_statvfs_from_dquot(statp, ip, dqp);
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xfs_qm_dqput(dqp);
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}
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}
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int
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xfs_qm_newmount(
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xfs_mount_t *mp,
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uint *needquotamount,
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uint *quotaflags)
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{
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uint quotaondisk;
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uint uquotaondisk = 0, gquotaondisk = 0, pquotaondisk = 0;
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quotaondisk = xfs_has_quota(mp) &&
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(mp->m_sb.sb_qflags & XFS_ALL_QUOTA_ACCT);
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if (quotaondisk) {
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uquotaondisk = mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT;
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pquotaondisk = mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT;
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gquotaondisk = mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT;
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}
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/*
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* If the device itself is read-only, we can't allow
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* the user to change the state of quota on the mount -
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* this would generate a transaction on the ro device,
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* which would lead to an I/O error and shutdown
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*/
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if (((uquotaondisk && !XFS_IS_UQUOTA_ON(mp)) ||
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(!uquotaondisk && XFS_IS_UQUOTA_ON(mp)) ||
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(gquotaondisk && !XFS_IS_GQUOTA_ON(mp)) ||
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(!gquotaondisk && XFS_IS_GQUOTA_ON(mp)) ||
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(pquotaondisk && !XFS_IS_PQUOTA_ON(mp)) ||
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(!pquotaondisk && XFS_IS_PQUOTA_ON(mp))) &&
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xfs_dev_is_read_only(mp, "changing quota state")) {
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xfs_warn(mp, "please mount with%s%s%s%s.",
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(!quotaondisk ? "out quota" : ""),
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(uquotaondisk ? " usrquota" : ""),
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(gquotaondisk ? " grpquota" : ""),
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(pquotaondisk ? " prjquota" : ""));
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return -EPERM;
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}
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if (XFS_IS_QUOTA_ON(mp) || quotaondisk) {
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/*
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* Call mount_quotas at this point only if we won't have to do
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* a quotacheck.
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*/
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if (quotaondisk && !XFS_QM_NEED_QUOTACHECK(mp)) {
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/*
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* If an error occurred, qm_mount_quotas code
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* has already disabled quotas. So, just finish
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* mounting, and get on with the boring life
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* without disk quotas.
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*/
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xfs_qm_mount_quotas(mp);
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} else {
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/*
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* Clear the quota flags, but remember them. This
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* is so that the quota code doesn't get invoked
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* before we're ready. This can happen when an
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* inode goes inactive and wants to free blocks,
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* or via xfs_log_mount_finish.
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*/
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*needquotamount = true;
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*quotaflags = mp->m_qflags;
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mp->m_qflags = 0;
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}
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}
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return 0;
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}
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/*
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* If the sysadmin didn't provide any quota mount options, restore the quota
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* accounting and enforcement state from the ondisk superblock. Only do this
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* for metadir filesystems because this is a behavior change.
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*/
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void
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xfs_qm_resume_quotaon(
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struct xfs_mount *mp)
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{
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if (!xfs_has_metadir(mp))
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return;
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if (xfs_has_norecovery(mp))
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return;
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mp->m_qflags = mp->m_sb.sb_qflags & (XFS_ALL_QUOTA_ACCT |
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XFS_ALL_QUOTA_ENFD);
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}
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