fs/xfs/xfs_quotaops.c

   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 };