138 lines · c
1// SPDX-License-Identifier: GPL-2.02/*3 * Copyright (c) 2000-2006 Silicon Graphics, Inc.4 * All Rights Reserved.5 */6#include "xfs.h"7#include "xfs_fs.h"8#include "xfs_shared.h"9#include "xfs_format.h"10#include "xfs_log_format.h"11#include "xfs_trans_resv.h"12#include "xfs_mount.h"13#include "xfs_quota.h"14#include "xfs_inode.h"15#include "xfs_trans.h"16#include "xfs_qm.h"17 18 19STATIC void20xfs_fill_statvfs_from_dquot(21 struct kstatfs *statp,22 struct xfs_dquot *dqp)23{24 uint64_t limit;25 26 limit = dqp->q_blk.softlimit ?27 dqp->q_blk.softlimit :28 dqp->q_blk.hardlimit;29 if (limit && statp->f_blocks > limit) {30 statp->f_blocks = limit;31 statp->f_bfree = statp->f_bavail =32 (statp->f_blocks > dqp->q_blk.reserved) ?33 (statp->f_blocks - dqp->q_blk.reserved) : 0;34 }35 36 limit = dqp->q_ino.softlimit ?37 dqp->q_ino.softlimit :38 dqp->q_ino.hardlimit;39 if (limit && statp->f_files > limit) {40 statp->f_files = limit;41 statp->f_ffree =42 (statp->f_files > dqp->q_ino.reserved) ?43 (statp->f_files - dqp->q_ino.reserved) : 0;44 }45}46 47 48/*49 * Directory tree accounting is implemented using project quotas, where50 * the project identifier is inherited from parent directories.51 * A statvfs (df, etc.) of a directory that is using project quota should52 * return a statvfs of the project, not the entire filesystem.53 * This makes such trees appear as if they are filesystems in themselves.54 */55void56xfs_qm_statvfs(57 struct xfs_inode *ip,58 struct kstatfs *statp)59{60 struct xfs_mount *mp = ip->i_mount;61 struct xfs_dquot *dqp;62 63 if (!xfs_qm_dqget(mp, ip->i_projid, XFS_DQTYPE_PROJ, false, &dqp)) {64 xfs_fill_statvfs_from_dquot(statp, dqp);65 xfs_qm_dqput(dqp);66 }67}68 69int70xfs_qm_newmount(71 xfs_mount_t *mp,72 uint *needquotamount,73 uint *quotaflags)74{75 uint quotaondisk;76 uint uquotaondisk = 0, gquotaondisk = 0, pquotaondisk = 0;77 78 quotaondisk = xfs_has_quota(mp) &&79 (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_ACCT);80 81 if (quotaondisk) {82 uquotaondisk = mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT;83 pquotaondisk = mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT;84 gquotaondisk = mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT;85 }86 87 /*88 * If the device itself is read-only, we can't allow89 * the user to change the state of quota on the mount -90 * this would generate a transaction on the ro device,91 * which would lead to an I/O error and shutdown92 */93 94 if (((uquotaondisk && !XFS_IS_UQUOTA_ON(mp)) ||95 (!uquotaondisk && XFS_IS_UQUOTA_ON(mp)) ||96 (gquotaondisk && !XFS_IS_GQUOTA_ON(mp)) ||97 (!gquotaondisk && XFS_IS_GQUOTA_ON(mp)) ||98 (pquotaondisk && !XFS_IS_PQUOTA_ON(mp)) ||99 (!pquotaondisk && XFS_IS_PQUOTA_ON(mp))) &&100 xfs_dev_is_read_only(mp, "changing quota state")) {101 xfs_warn(mp, "please mount with%s%s%s%s.",102 (!quotaondisk ? "out quota" : ""),103 (uquotaondisk ? " usrquota" : ""),104 (gquotaondisk ? " grpquota" : ""),105 (pquotaondisk ? " prjquota" : ""));106 return -EPERM;107 }108 109 if (XFS_IS_QUOTA_ON(mp) || quotaondisk) {110 /*111 * Call mount_quotas at this point only if we won't have to do112 * a quotacheck.113 */114 if (quotaondisk && !XFS_QM_NEED_QUOTACHECK(mp)) {115 /*116 * If an error occurred, qm_mount_quotas code117 * has already disabled quotas. So, just finish118 * mounting, and get on with the boring life119 * without disk quotas.120 */121 xfs_qm_mount_quotas(mp);122 } else {123 /*124 * Clear the quota flags, but remember them. This125 * is so that the quota code doesn't get invoked126 * before we're ready. This can happen when an127 * inode goes inactive and wants to free blocks,128 * or via xfs_log_mount_finish.129 */130 *needquotamount = true;131 *quotaflags = mp->m_qflags;132 mp->m_qflags = 0;133 }134 }135 136 return 0;137}138