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_format.h" 21 #include "xfs_log.h" 22 #include "xfs_trans.h" 23 #include "xfs_sb.h" 24 #include "xfs_ag.h" 25 #include "xfs_alloc.h" 26 #include "xfs_quota.h" 27 #include "xfs_mount.h" 28 #include "xfs_bmap_btree.h" 29 #include "xfs_inode.h" 30 #include "xfs_itable.h" 31 #include "xfs_bmap.h" 32 #include "xfs_rtalloc.h" 33 #include "xfs_error.h" 34 #include "xfs_attr.h" 35 #include "xfs_buf_item.h" 36 #include "xfs_qm.h" 37 38 39 STATIC void 40 xfs_fill_statvfs_from_dquot( 41 struct kstatfs *statp, 42 struct xfs_dquot *dqp) 43 { 44 __uint64_t limit; 45 46 limit = dqp->q_core.d_blk_softlimit ? 47 be64_to_cpu(dqp->q_core.d_blk_softlimit) : 48 be64_to_cpu(dqp->q_core.d_blk_hardlimit); 49 if (limit && statp->f_blocks > limit) { 50 statp->f_blocks = limit; 51 statp->f_bfree = statp->f_bavail = 52 (statp->f_blocks > dqp->q_res_bcount) ? 53 (statp->f_blocks - dqp->q_res_bcount) : 0; 54 } 55 56 limit = dqp->q_core.d_ino_softlimit ? 57 be64_to_cpu(dqp->q_core.d_ino_softlimit) : 58 be64_to_cpu(dqp->q_core.d_ino_hardlimit); 59 if (limit && statp->f_files > limit) { 60 statp->f_files = limit; 61 statp->f_ffree = 62 (statp->f_files > dqp->q_res_icount) ? 63 (statp->f_ffree - dqp->q_res_icount) : 0; 64 } 65 } 66 67 68 /* 69 * Directory tree accounting is implemented using project quotas, where 70 * the project identifier is inherited from parent directories. 71 * A statvfs (df, etc.) of a directory that is using project quota should 72 * return a statvfs of the project, not the entire filesystem. 73 * This makes such trees appear as if they are filesystems in themselves. 74 */ 75 void 76 xfs_qm_statvfs( 77 xfs_inode_t *ip, 78 struct kstatfs *statp) 79 { 80 xfs_mount_t *mp = ip->i_mount; 81 xfs_dquot_t *dqp; 82 83 if (!xfs_qm_dqget(mp, NULL, xfs_get_projid(ip), XFS_DQ_PROJ, 0, &dqp)) { 84 xfs_fill_statvfs_from_dquot(statp, dqp); 85 xfs_qm_dqput(dqp); 86 } 87 } 88 89 int 90 xfs_qm_newmount( 91 xfs_mount_t *mp, 92 uint *needquotamount, 93 uint *quotaflags) 94 { 95 uint quotaondisk; 96 uint uquotaondisk = 0, gquotaondisk = 0, pquotaondisk = 0; 97 98 quotaondisk = xfs_sb_version_hasquota(&mp->m_sb) && 99 (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_ACCT); 100 101 if (quotaondisk) { 102 uquotaondisk = mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT; 103 pquotaondisk = mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT; 104 gquotaondisk = mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT; 105 } 106 107 /* 108 * If the device itself is read-only, we can't allow 109 * the user to change the state of quota on the mount - 110 * this would generate a transaction on the ro device, 111 * which would lead to an I/O error and shutdown 112 */ 113 114 if (((uquotaondisk && !XFS_IS_UQUOTA_ON(mp)) || 115 (!uquotaondisk && XFS_IS_UQUOTA_ON(mp)) || 116 (gquotaondisk && !XFS_IS_GQUOTA_ON(mp)) || 117 (!gquotaondisk && XFS_IS_GQUOTA_ON(mp)) || 118 (pquotaondisk && !XFS_IS_PQUOTA_ON(mp)) || 119 (!pquotaondisk && XFS_IS_PQUOTA_ON(mp))) && 120 xfs_dev_is_read_only(mp, "changing quota state")) { 121 xfs_warn(mp, "please mount with%s%s%s%s.", 122 (!quotaondisk ? "out quota" : ""), 123 (uquotaondisk ? " usrquota" : ""), 124 (gquotaondisk ? " grpquota" : ""), 125 (pquotaondisk ? " prjquota" : "")); 126 return XFS_ERROR(EPERM); 127 } 128 129 if (XFS_IS_QUOTA_ON(mp) || quotaondisk) { 130 /* 131 * Call mount_quotas at this point only if we won't have to do 132 * a quotacheck. 133 */ 134 if (quotaondisk && !XFS_QM_NEED_QUOTACHECK(mp)) { 135 /* 136 * If an error occurred, qm_mount_quotas code 137 * has already disabled quotas. So, just finish 138 * mounting, and get on with the boring life 139 * without disk quotas. 140 */ 141 xfs_qm_mount_quotas(mp); 142 } else { 143 /* 144 * Clear the quota flags, but remember them. This 145 * is so that the quota code doesn't get invoked 146 * before we're ready. This can happen when an 147 * inode goes inactive and wants to free blocks, 148 * or via xfs_log_mount_finish. 149 */ 150 *needquotamount = true; 151 *quotaflags = mp->m_qflags; 152 mp->m_qflags = 0; 153 } 154 } 155 156 return 0; 157 } 158