1 /* 2 * Copyright (c) 2000-2006 Silicon Graphics, Inc. 3 * All Rights Reserved. 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it would be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 #include "xfs.h" 19 #include "xfs_fs.h" 20 #include "xfs_log.h" 21 #include "xfs_trans.h" 22 #include "xfs_sb.h" 23 #include "xfs_ag.h" 24 #include "xfs_alloc.h" 25 #include "xfs_quota.h" 26 #include "xfs_mount.h" 27 #include "xfs_bmap_btree.h" 28 #include "xfs_inode.h" 29 #include "xfs_itable.h" 30 #include "xfs_bmap.h" 31 #include "xfs_rtalloc.h" 32 #include "xfs_error.h" 33 #include "xfs_attr.h" 34 #include "xfs_buf_item.h" 35 #include "xfs_qm.h" 36 37 38 STATIC void 39 xfs_fill_statvfs_from_dquot( 40 struct kstatfs *statp, 41 struct xfs_dquot *dqp) 42 { 43 __uint64_t limit; 44 45 limit = dqp->q_core.d_blk_softlimit ? 46 be64_to_cpu(dqp->q_core.d_blk_softlimit) : 47 be64_to_cpu(dqp->q_core.d_blk_hardlimit); 48 if (limit && statp->f_blocks > limit) { 49 statp->f_blocks = limit; 50 statp->f_bfree = statp->f_bavail = 51 (statp->f_blocks > dqp->q_res_bcount) ? 52 (statp->f_blocks - dqp->q_res_bcount) : 0; 53 } 54 55 limit = dqp->q_core.d_ino_softlimit ? 56 be64_to_cpu(dqp->q_core.d_ino_softlimit) : 57 be64_to_cpu(dqp->q_core.d_ino_hardlimit); 58 if (limit && statp->f_files > limit) { 59 statp->f_files = limit; 60 statp->f_ffree = 61 (statp->f_files > dqp->q_res_icount) ? 62 (statp->f_ffree - dqp->q_res_icount) : 0; 63 } 64 } 65 66 67 /* 68 * Directory tree accounting is implemented using project quotas, where 69 * the project identifier is inherited from parent directories. 70 * A statvfs (df, etc.) of a directory that is using project quota should 71 * return a statvfs of the project, not the entire filesystem. 72 * This makes such trees appear as if they are filesystems in themselves. 73 */ 74 void 75 xfs_qm_statvfs( 76 xfs_inode_t *ip, 77 struct kstatfs *statp) 78 { 79 xfs_mount_t *mp = ip->i_mount; 80 xfs_dquot_t *dqp; 81 82 if (!xfs_qm_dqget(mp, NULL, xfs_get_projid(ip), XFS_DQ_PROJ, 0, &dqp)) { 83 xfs_fill_statvfs_from_dquot(statp, dqp); 84 xfs_qm_dqput(dqp); 85 } 86 } 87 88 int 89 xfs_qm_newmount( 90 xfs_mount_t *mp, 91 uint *needquotamount, 92 uint *quotaflags) 93 { 94 uint quotaondisk; 95 uint uquotaondisk = 0, gquotaondisk = 0, pquotaondisk = 0; 96 97 quotaondisk = xfs_sb_version_hasquota(&mp->m_sb) && 98 (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_ACCT); 99 100 if (quotaondisk) { 101 uquotaondisk = mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT; 102 pquotaondisk = mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT; 103 gquotaondisk = mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT; 104 } 105 106 /* 107 * If the device itself is read-only, we can't allow 108 * the user to change the state of quota on the mount - 109 * this would generate a transaction on the ro device, 110 * which would lead to an I/O error and shutdown 111 */ 112 113 if (((uquotaondisk && !XFS_IS_UQUOTA_ON(mp)) || 114 (!uquotaondisk && XFS_IS_UQUOTA_ON(mp)) || 115 (gquotaondisk && !XFS_IS_GQUOTA_ON(mp)) || 116 (!gquotaondisk && XFS_IS_GQUOTA_ON(mp)) || 117 (pquotaondisk && !XFS_IS_PQUOTA_ON(mp)) || 118 (!pquotaondisk && XFS_IS_PQUOTA_ON(mp))) && 119 xfs_dev_is_read_only(mp, "changing quota state")) { 120 xfs_warn(mp, "please mount with%s%s%s%s.", 121 (!quotaondisk ? "out quota" : ""), 122 (uquotaondisk ? " usrquota" : ""), 123 (gquotaondisk ? " grpquota" : ""), 124 (pquotaondisk ? " prjquota" : "")); 125 return XFS_ERROR(EPERM); 126 } 127 128 if (XFS_IS_QUOTA_ON(mp) || quotaondisk) { 129 /* 130 * Call mount_quotas at this point only if we won't have to do 131 * a quotacheck. 132 */ 133 if (quotaondisk && !XFS_QM_NEED_QUOTACHECK(mp)) { 134 /* 135 * If an error occurred, qm_mount_quotas code 136 * has already disabled quotas. So, just finish 137 * mounting, and get on with the boring life 138 * without disk quotas. 139 */ 140 xfs_qm_mount_quotas(mp); 141 } else { 142 /* 143 * Clear the quota flags, but remember them. This 144 * is so that the quota code doesn't get invoked 145 * before we're ready. This can happen when an 146 * inode goes inactive and wants to free blocks, 147 * or via xfs_log_mount_finish. 148 */ 149 *needquotamount = true; 150 *quotaflags = mp->m_qflags; 151 mp->m_qflags = 0; 152 } 153 } 154 155 return 0; 156 } 157