1 /* 2 * Copyright (c) 2008, Christoph Hellwig 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_format.h" 20 #include "xfs_log_format.h" 21 #include "xfs_trans_resv.h" 22 #include "xfs_mount.h" 23 #include "xfs_inode.h" 24 #include "xfs_quota.h" 25 #include "xfs_trans.h" 26 #include "xfs_trace.h" 27 #include "xfs_icache.h" 28 #include "xfs_qm.h" 29 #include <linux/quota.h> 30 31 32 static void 33 xfs_qm_fill_state( 34 struct qc_type_state *tstate, 35 struct xfs_mount *mp, 36 struct xfs_inode *ip, 37 xfs_ino_t ino) 38 { 39 struct xfs_quotainfo *q = mp->m_quotainfo; 40 bool tempqip = false; 41 42 tstate->ino = ino; 43 if (!ip && ino == NULLFSINO) 44 return; 45 if (!ip) { 46 if (xfs_iget(mp, NULL, ino, 0, 0, &ip)) 47 return; 48 tempqip = true; 49 } 50 tstate->flags |= QCI_SYSFILE; 51 tstate->blocks = ip->i_d.di_nblocks; 52 tstate->nextents = ip->i_d.di_nextents; 53 tstate->spc_timelimit = q->qi_btimelimit; 54 tstate->ino_timelimit = q->qi_itimelimit; 55 tstate->rt_spc_timelimit = q->qi_rtbtimelimit; 56 tstate->spc_warnlimit = q->qi_bwarnlimit; 57 tstate->ino_warnlimit = q->qi_iwarnlimit; 58 tstate->rt_spc_warnlimit = q->qi_rtbwarnlimit; 59 if (tempqip) 60 IRELE(ip); 61 } 62 63 /* 64 * Return quota status information, such as enforcements, quota file inode 65 * numbers etc. 66 */ 67 static int 68 xfs_fs_get_quota_state( 69 struct super_block *sb, 70 struct qc_state *state) 71 { 72 struct xfs_mount *mp = XFS_M(sb); 73 struct xfs_quotainfo *q = mp->m_quotainfo; 74 75 memset(state, 0, sizeof(*state)); 76 if (!XFS_IS_QUOTA_RUNNING(mp)) 77 return 0; 78 state->s_incoredqs = q->qi_dquots; 79 if (XFS_IS_UQUOTA_RUNNING(mp)) 80 state->s_state[USRQUOTA].flags |= QCI_ACCT_ENABLED; 81 if (XFS_IS_UQUOTA_ENFORCED(mp)) 82 state->s_state[USRQUOTA].flags |= QCI_LIMITS_ENFORCED; 83 if (XFS_IS_GQUOTA_RUNNING(mp)) 84 state->s_state[GRPQUOTA].flags |= QCI_ACCT_ENABLED; 85 if (XFS_IS_GQUOTA_ENFORCED(mp)) 86 state->s_state[GRPQUOTA].flags |= QCI_LIMITS_ENFORCED; 87 if (XFS_IS_PQUOTA_RUNNING(mp)) 88 state->s_state[PRJQUOTA].flags |= QCI_ACCT_ENABLED; 89 if (XFS_IS_PQUOTA_ENFORCED(mp)) 90 state->s_state[PRJQUOTA].flags |= QCI_LIMITS_ENFORCED; 91 92 xfs_qm_fill_state(&state->s_state[USRQUOTA], mp, q->qi_uquotaip, 93 mp->m_sb.sb_uquotino); 94 xfs_qm_fill_state(&state->s_state[GRPQUOTA], mp, q->qi_gquotaip, 95 mp->m_sb.sb_gquotino); 96 xfs_qm_fill_state(&state->s_state[PRJQUOTA], mp, q->qi_pquotaip, 97 mp->m_sb.sb_pquotino); 98 return 0; 99 } 100 101 STATIC int 102 xfs_quota_type(int type) 103 { 104 switch (type) { 105 case USRQUOTA: 106 return XFS_DQ_USER; 107 case GRPQUOTA: 108 return XFS_DQ_GROUP; 109 default: 110 return XFS_DQ_PROJ; 111 } 112 } 113 114 #define XFS_QC_SETINFO_MASK (QC_TIMER_MASK | QC_WARNS_MASK) 115 116 /* 117 * Adjust quota timers & warnings 118 */ 119 static int 120 xfs_fs_set_info( 121 struct super_block *sb, 122 int type, 123 struct qc_info *info) 124 { 125 struct xfs_mount *mp = XFS_M(sb); 126 struct qc_dqblk newlim; 127 128 if (sb->s_flags & MS_RDONLY) 129 return -EROFS; 130 if (!XFS_IS_QUOTA_RUNNING(mp)) 131 return -ENOSYS; 132 if (!XFS_IS_QUOTA_ON(mp)) 133 return -ESRCH; 134 if (info->i_fieldmask & ~XFS_QC_SETINFO_MASK) 135 return -EINVAL; 136 if ((info->i_fieldmask & XFS_QC_SETINFO_MASK) == 0) 137 return 0; 138 139 newlim.d_fieldmask = info->i_fieldmask; 140 newlim.d_spc_timer = info->i_spc_timelimit; 141 newlim.d_ino_timer = info->i_ino_timelimit; 142 newlim.d_rt_spc_timer = info->i_rt_spc_timelimit; 143 newlim.d_ino_warns = info->i_ino_warnlimit; 144 newlim.d_spc_warns = info->i_spc_warnlimit; 145 newlim.d_rt_spc_warns = info->i_rt_spc_warnlimit; 146 147 return xfs_qm_scall_setqlim(mp, 0, xfs_quota_type(type), &newlim); 148 } 149 150 static unsigned int 151 xfs_quota_flags(unsigned int uflags) 152 { 153 unsigned int flags = 0; 154 155 if (uflags & FS_QUOTA_UDQ_ACCT) 156 flags |= XFS_UQUOTA_ACCT; 157 if (uflags & FS_QUOTA_PDQ_ACCT) 158 flags |= XFS_PQUOTA_ACCT; 159 if (uflags & FS_QUOTA_GDQ_ACCT) 160 flags |= XFS_GQUOTA_ACCT; 161 if (uflags & FS_QUOTA_UDQ_ENFD) 162 flags |= XFS_UQUOTA_ENFD; 163 if (uflags & FS_QUOTA_GDQ_ENFD) 164 flags |= XFS_GQUOTA_ENFD; 165 if (uflags & FS_QUOTA_PDQ_ENFD) 166 flags |= XFS_PQUOTA_ENFD; 167 168 return flags; 169 } 170 171 STATIC int 172 xfs_quota_enable( 173 struct super_block *sb, 174 unsigned int uflags) 175 { 176 struct xfs_mount *mp = XFS_M(sb); 177 178 if (sb->s_flags & MS_RDONLY) 179 return -EROFS; 180 if (!XFS_IS_QUOTA_RUNNING(mp)) 181 return -ENOSYS; 182 183 return xfs_qm_scall_quotaon(mp, xfs_quota_flags(uflags)); 184 } 185 186 STATIC int 187 xfs_quota_disable( 188 struct super_block *sb, 189 unsigned int uflags) 190 { 191 struct xfs_mount *mp = XFS_M(sb); 192 193 if (sb->s_flags & MS_RDONLY) 194 return -EROFS; 195 if (!XFS_IS_QUOTA_RUNNING(mp)) 196 return -ENOSYS; 197 if (!XFS_IS_QUOTA_ON(mp)) 198 return -EINVAL; 199 200 return xfs_qm_scall_quotaoff(mp, xfs_quota_flags(uflags)); 201 } 202 203 STATIC int 204 xfs_fs_rm_xquota( 205 struct super_block *sb, 206 unsigned int uflags) 207 { 208 struct xfs_mount *mp = XFS_M(sb); 209 unsigned int flags = 0; 210 211 if (sb->s_flags & MS_RDONLY) 212 return -EROFS; 213 214 if (XFS_IS_QUOTA_ON(mp)) 215 return -EINVAL; 216 217 if (uflags & FS_USER_QUOTA) 218 flags |= XFS_DQ_USER; 219 if (uflags & FS_GROUP_QUOTA) 220 flags |= XFS_DQ_GROUP; 221 if (uflags & FS_PROJ_QUOTA) 222 flags |= XFS_DQ_PROJ; 223 224 return xfs_qm_scall_trunc_qfiles(mp, flags); 225 } 226 227 STATIC int 228 xfs_fs_get_dqblk( 229 struct super_block *sb, 230 struct kqid qid, 231 struct qc_dqblk *qdq) 232 { 233 struct xfs_mount *mp = XFS_M(sb); 234 xfs_dqid_t id; 235 236 if (!XFS_IS_QUOTA_RUNNING(mp)) 237 return -ENOSYS; 238 if (!XFS_IS_QUOTA_ON(mp)) 239 return -ESRCH; 240 241 id = from_kqid(&init_user_ns, qid); 242 return xfs_qm_scall_getquota(mp, &id, 243 xfs_quota_type(qid.type), qdq, 0); 244 } 245 246 /* Return quota info for active quota >= this qid */ 247 STATIC int 248 xfs_fs_get_nextdqblk( 249 struct super_block *sb, 250 struct kqid *qid, 251 struct qc_dqblk *qdq) 252 { 253 int ret; 254 struct xfs_mount *mp = XFS_M(sb); 255 xfs_dqid_t id; 256 257 if (!XFS_IS_QUOTA_RUNNING(mp)) 258 return -ENOSYS; 259 if (!XFS_IS_QUOTA_ON(mp)) 260 return -ESRCH; 261 262 id = from_kqid(&init_user_ns, *qid); 263 ret = xfs_qm_scall_getquota(mp, &id, 264 xfs_quota_type(qid->type), qdq, 265 XFS_QMOPT_DQNEXT); 266 if (ret) 267 return ret; 268 269 /* ID may be different, so convert back what we got */ 270 *qid = make_kqid(current_user_ns(), qid->type, id); 271 return 0; 272 } 273 274 STATIC int 275 xfs_fs_set_dqblk( 276 struct super_block *sb, 277 struct kqid qid, 278 struct qc_dqblk *qdq) 279 { 280 struct xfs_mount *mp = XFS_M(sb); 281 282 if (sb->s_flags & MS_RDONLY) 283 return -EROFS; 284 if (!XFS_IS_QUOTA_RUNNING(mp)) 285 return -ENOSYS; 286 if (!XFS_IS_QUOTA_ON(mp)) 287 return -ESRCH; 288 289 return xfs_qm_scall_setqlim(mp, from_kqid(&init_user_ns, qid), 290 xfs_quota_type(qid.type), qdq); 291 } 292 293 const struct quotactl_ops xfs_quotactl_operations = { 294 .get_state = xfs_fs_get_quota_state, 295 .set_info = xfs_fs_set_info, 296 .quota_enable = xfs_quota_enable, 297 .quota_disable = xfs_quota_disable, 298 .rm_xquota = xfs_fs_rm_xquota, 299 .get_dqblk = xfs_fs_get_dqblk, 300 .get_nextdqblk = xfs_fs_get_nextdqblk, 301 .set_dqblk = xfs_fs_set_dqblk, 302 }; 303