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