6ca1c9063d
The on disk format definitions of the on-disk dquot, log formats and quota off log formats are all intertwined with other definitions for quotas. Separate them out into their own header file so they can easily be shared with userspace. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Mark Tinguely <tinguely@sgi.com> Signed-off-by: Ben Myers <bpm@sgi.com>
157 lines
4.4 KiB
C
157 lines
4.4 KiB
C
/*
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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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* 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_fs.h"
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#include "xfs_format.h"
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#include "xfs_log.h"
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#include "xfs_trans.h"
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#include "xfs_sb.h"
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#include "xfs_ag.h"
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#include "xfs_alloc.h"
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#include "xfs_quota.h"
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#include "xfs_mount.h"
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#include "xfs_bmap_btree.h"
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#include "xfs_inode.h"
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#include "xfs_itable.h"
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#include "xfs_bmap.h"
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#include "xfs_rtalloc.h"
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#include "xfs_error.h"
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#include "xfs_attr.h"
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#include "xfs_buf_item.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_dquot *dqp)
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{
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__uint64_t limit;
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limit = dqp->q_core.d_blk_softlimit ?
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be64_to_cpu(dqp->q_core.d_blk_softlimit) :
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be64_to_cpu(dqp->q_core.d_blk_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 > dqp->q_res_bcount) ?
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(statp->f_blocks - dqp->q_res_bcount) : 0;
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}
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limit = dqp->q_core.d_ino_softlimit ?
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be64_to_cpu(dqp->q_core.d_ino_softlimit) :
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be64_to_cpu(dqp->q_core.d_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_res_icount) ?
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(statp->f_ffree - dqp->q_res_icount) : 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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xfs_inode_t *ip,
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struct kstatfs *statp)
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{
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xfs_mount_t *mp = ip->i_mount;
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xfs_dquot_t *dqp;
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if (!xfs_qm_dqget(mp, NULL, xfs_get_projid(ip), XFS_DQ_PROJ, 0, &dqp)) {
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xfs_fill_statvfs_from_dquot(statp, 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_sb_version_hasquota(&mp->m_sb) &&
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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 XFS_ERROR(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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