| 1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | /* |
| 3 | * Copyright (c) 2008, Christoph Hellwig |
| 4 | * All Rights Reserved. |
| 5 | */ |
| 6 | #include "xfs.h" |
| 7 | #include "xfs_shared.h" |
| 8 | #include "xfs_format.h" |
| 9 | #include "xfs_log_format.h" |
| 10 | #include "xfs_trans_resv.h" |
| 11 | #include "xfs_mount.h" |
| 12 | #include "xfs_inode.h" |
| 13 | #include "xfs_quota.h" |
| 14 | #include "xfs_trans.h" |
| 15 | #include "xfs_icache.h" |
| 16 | #include "xfs_qm.h" |
| 17 | |
| 18 | |
| 19 | static void |
| 20 | xfs_qm_fill_state( |
| 21 | struct qc_type_state *tstate, |
| 22 | struct xfs_mount *mp, |
| 23 | struct xfs_inode *ip, |
| 24 | xfs_ino_t ino, |
| 25 | struct xfs_def_quota *defq) |
| 26 | { |
| 27 | bool tempqip = false; |
| 28 | |
| 29 | tstate->ino = ino; |
| 30 | if (!ip && ino == NULLFSINO) |
| 31 | return; |
| 32 | if (!ip) { |
| 33 | if (xfs_iget(mp, NULL, ino, 0, 0, &ip)) |
| 34 | return; |
| 35 | tempqip = true; |
| 36 | } |
| 37 | tstate->flags |= QCI_SYSFILE; |
| 38 | tstate->blocks = ip->i_nblocks; |
| 39 | tstate->nextents = ip->i_df.if_nextents; |
| 40 | tstate->spc_timelimit = (u32)defq->blk.time; |
| 41 | tstate->ino_timelimit = (u32)defq->ino.time; |
| 42 | tstate->rt_spc_timelimit = (u32)defq->rtb.time; |
| 43 | tstate->spc_warnlimit = defq->blk.warn; |
| 44 | tstate->ino_warnlimit = defq->ino.warn; |
| 45 | tstate->rt_spc_warnlimit = defq->rtb.warn; |
| 46 | if (tempqip) |
| 47 | xfs_irele(ip); |
| 48 | } |
| 49 | |
| 50 | /* |
| 51 | * Return quota status information, such as enforcements, quota file inode |
| 52 | * numbers etc. |
| 53 | */ |
| 54 | static int |
| 55 | xfs_fs_get_quota_state( |
| 56 | struct super_block *sb, |
| 57 | struct qc_state *state) |
| 58 | { |
| 59 | struct xfs_mount *mp = XFS_M(sb); |
| 60 | struct xfs_quotainfo *q = mp->m_quotainfo; |
| 61 | |
| 62 | memset(state, 0, sizeof(*state)); |
| 63 | if (!XFS_IS_QUOTA_ON(mp)) |
| 64 | return 0; |
| 65 | state->s_incoredqs = q->qi_dquots; |
| 66 | if (XFS_IS_UQUOTA_ON(mp)) |
| 67 | state->s_state[USRQUOTA].flags |= QCI_ACCT_ENABLED; |
| 68 | if (XFS_IS_UQUOTA_ENFORCED(mp)) |
| 69 | state->s_state[USRQUOTA].flags |= QCI_LIMITS_ENFORCED; |
| 70 | if (XFS_IS_GQUOTA_ON(mp)) |
| 71 | state->s_state[GRPQUOTA].flags |= QCI_ACCT_ENABLED; |
| 72 | if (XFS_IS_GQUOTA_ENFORCED(mp)) |
| 73 | state->s_state[GRPQUOTA].flags |= QCI_LIMITS_ENFORCED; |
| 74 | if (XFS_IS_PQUOTA_ON(mp)) |
| 75 | state->s_state[PRJQUOTA].flags |= QCI_ACCT_ENABLED; |
| 76 | if (XFS_IS_PQUOTA_ENFORCED(mp)) |
| 77 | state->s_state[PRJQUOTA].flags |= QCI_LIMITS_ENFORCED; |
| 78 | |
| 79 | xfs_qm_fill_state(&state->s_state[USRQUOTA], mp, q->qi_uquotaip, |
| 80 | mp->m_sb.sb_uquotino, &q->qi_usr_default); |
| 81 | xfs_qm_fill_state(&state->s_state[GRPQUOTA], mp, q->qi_gquotaip, |
| 82 | mp->m_sb.sb_gquotino, &q->qi_grp_default); |
| 83 | xfs_qm_fill_state(&state->s_state[PRJQUOTA], mp, q->qi_pquotaip, |
| 84 | mp->m_sb.sb_pquotino, &q->qi_prj_default); |
| 85 | return 0; |
| 86 | } |
| 87 | |
| 88 | STATIC xfs_dqtype_t |
| 89 | xfs_quota_type(int type) |
| 90 | { |
| 91 | switch (type) { |
| 92 | case USRQUOTA: |
| 93 | return XFS_DQTYPE_USER; |
| 94 | case GRPQUOTA: |
| 95 | return XFS_DQTYPE_GROUP; |
| 96 | default: |
| 97 | return XFS_DQTYPE_PROJ; |
| 98 | } |
| 99 | } |
| 100 | |
| 101 | #define XFS_QC_SETINFO_MASK (QC_TIMER_MASK | QC_WARNS_MASK) |
| 102 | |
| 103 | /* |
| 104 | * Adjust quota timers & warnings |
| 105 | */ |
| 106 | static int |
| 107 | xfs_fs_set_info( |
| 108 | struct super_block *sb, |
| 109 | int type, |
| 110 | struct qc_info *info) |
| 111 | { |
| 112 | struct xfs_mount *mp = XFS_M(sb); |
| 113 | struct qc_dqblk newlim; |
| 114 | |
| 115 | if (sb_rdonly(sb)) |
| 116 | return -EROFS; |
| 117 | if (!XFS_IS_QUOTA_ON(mp)) |
| 118 | return -ENOSYS; |
| 119 | if (info->i_fieldmask & ~XFS_QC_SETINFO_MASK) |
| 120 | return -EINVAL; |
| 121 | if ((info->i_fieldmask & XFS_QC_SETINFO_MASK) == 0) |
| 122 | return 0; |
| 123 | |
| 124 | newlim.d_fieldmask = info->i_fieldmask; |
| 125 | newlim.d_spc_timer = info->i_spc_timelimit; |
| 126 | newlim.d_ino_timer = info->i_ino_timelimit; |
| 127 | newlim.d_rt_spc_timer = info->i_rt_spc_timelimit; |
| 128 | newlim.d_ino_warns = info->i_ino_warnlimit; |
| 129 | newlim.d_spc_warns = info->i_spc_warnlimit; |
| 130 | newlim.d_rt_spc_warns = info->i_rt_spc_warnlimit; |
| 131 | |
| 132 | return xfs_qm_scall_setqlim(mp, 0, xfs_quota_type(type), &newlim); |
| 133 | } |
| 134 | |
| 135 | static unsigned int |
| 136 | xfs_quota_flags(unsigned int uflags) |
| 137 | { |
| 138 | unsigned int flags = 0; |
| 139 | |
| 140 | if (uflags & FS_QUOTA_UDQ_ACCT) |
| 141 | flags |= XFS_UQUOTA_ACCT; |
| 142 | if (uflags & FS_QUOTA_PDQ_ACCT) |
| 143 | flags |= XFS_PQUOTA_ACCT; |
| 144 | if (uflags & FS_QUOTA_GDQ_ACCT) |
| 145 | flags |= XFS_GQUOTA_ACCT; |
| 146 | if (uflags & FS_QUOTA_UDQ_ENFD) |
| 147 | flags |= XFS_UQUOTA_ENFD; |
| 148 | if (uflags & FS_QUOTA_GDQ_ENFD) |
| 149 | flags |= XFS_GQUOTA_ENFD; |
| 150 | if (uflags & FS_QUOTA_PDQ_ENFD) |
| 151 | flags |= XFS_PQUOTA_ENFD; |
| 152 | |
| 153 | return flags; |
| 154 | } |
| 155 | |
| 156 | STATIC int |
| 157 | xfs_quota_enable( |
| 158 | struct super_block *sb, |
| 159 | unsigned int uflags) |
| 160 | { |
| 161 | struct xfs_mount *mp = XFS_M(sb); |
| 162 | |
| 163 | if (sb_rdonly(sb)) |
| 164 | return -EROFS; |
| 165 | if (!XFS_IS_QUOTA_ON(mp)) |
| 166 | return -ENOSYS; |
| 167 | |
| 168 | return xfs_qm_scall_quotaon(mp, xfs_quota_flags(uflags)); |
| 169 | } |
| 170 | |
| 171 | STATIC int |
| 172 | xfs_quota_disable( |
| 173 | struct super_block *sb, |
| 174 | unsigned int uflags) |
| 175 | { |
| 176 | struct xfs_mount *mp = XFS_M(sb); |
| 177 | |
| 178 | if (sb_rdonly(sb)) |
| 179 | return -EROFS; |
| 180 | if (!XFS_IS_QUOTA_ON(mp)) |
| 181 | return -ENOSYS; |
| 182 | |
| 183 | return xfs_qm_scall_quotaoff(mp, xfs_quota_flags(uflags)); |
| 184 | } |
| 185 | |
| 186 | STATIC int |
| 187 | xfs_fs_rm_xquota( |
| 188 | struct super_block *sb, |
| 189 | unsigned int uflags) |
| 190 | { |
| 191 | struct xfs_mount *mp = XFS_M(sb); |
| 192 | unsigned int flags = 0; |
| 193 | |
| 194 | if (sb_rdonly(sb)) |
| 195 | return -EROFS; |
| 196 | |
| 197 | if (XFS_IS_QUOTA_ON(mp)) |
| 198 | return -EINVAL; |
| 199 | |
| 200 | if (uflags & ~(FS_USER_QUOTA | FS_GROUP_QUOTA | FS_PROJ_QUOTA)) |
| 201 | return -EINVAL; |
| 202 | |
| 203 | if (uflags & FS_USER_QUOTA) |
| 204 | flags |= XFS_QMOPT_UQUOTA; |
| 205 | if (uflags & FS_GROUP_QUOTA) |
| 206 | flags |= XFS_QMOPT_GQUOTA; |
| 207 | if (uflags & FS_PROJ_QUOTA) |
| 208 | flags |= XFS_QMOPT_PQUOTA; |
| 209 | |
| 210 | return xfs_qm_scall_trunc_qfiles(mp, flags); |
| 211 | } |
| 212 | |
| 213 | STATIC int |
| 214 | xfs_fs_get_dqblk( |
| 215 | struct super_block *sb, |
| 216 | struct kqid qid, |
| 217 | struct qc_dqblk *qdq) |
| 218 | { |
| 219 | struct xfs_mount *mp = XFS_M(sb); |
| 220 | xfs_dqid_t id; |
| 221 | |
| 222 | if (!XFS_IS_QUOTA_ON(mp)) |
| 223 | return -ENOSYS; |
| 224 | |
| 225 | id = from_kqid(&init_user_ns, qid); |
| 226 | return xfs_qm_scall_getquota(mp, id, xfs_quota_type(qid.type), qdq); |
| 227 | } |
| 228 | |
| 229 | /* Return quota info for active quota >= this qid */ |
| 230 | STATIC int |
| 231 | xfs_fs_get_nextdqblk( |
| 232 | struct super_block *sb, |
| 233 | struct kqid *qid, |
| 234 | struct qc_dqblk *qdq) |
| 235 | { |
| 236 | int ret; |
| 237 | struct xfs_mount *mp = XFS_M(sb); |
| 238 | xfs_dqid_t id; |
| 239 | |
| 240 | if (!XFS_IS_QUOTA_ON(mp)) |
| 241 | return -ENOSYS; |
| 242 | |
| 243 | id = from_kqid(&init_user_ns, *qid); |
| 244 | ret = xfs_qm_scall_getquota_next(mp, &id, xfs_quota_type(qid->type), |
| 245 | qdq); |
| 246 | if (ret) |
| 247 | return ret; |
| 248 | |
| 249 | /* ID may be different, so convert back what we got */ |
| 250 | *qid = make_kqid(current_user_ns(), qid->type, id); |
| 251 | return 0; |
| 252 | } |
| 253 | |
| 254 | STATIC int |
| 255 | xfs_fs_set_dqblk( |
| 256 | struct super_block *sb, |
| 257 | struct kqid qid, |
| 258 | struct qc_dqblk *qdq) |
| 259 | { |
| 260 | struct xfs_mount *mp = XFS_M(sb); |
| 261 | |
| 262 | if (sb_rdonly(sb)) |
| 263 | return -EROFS; |
| 264 | if (!XFS_IS_QUOTA_ON(mp)) |
| 265 | return -ENOSYS; |
| 266 | |
| 267 | return xfs_qm_scall_setqlim(mp, from_kqid(&init_user_ns, qid), |
| 268 | xfs_quota_type(qid.type), qdq); |
| 269 | } |
| 270 | |
| 271 | const struct quotactl_ops xfs_quotactl_operations = { |
| 272 | .get_state = xfs_fs_get_quota_state, |
| 273 | .set_info = xfs_fs_set_info, |
| 274 | .quota_enable = xfs_quota_enable, |
| 275 | .quota_disable = xfs_quota_disable, |
| 276 | .rm_xquota = xfs_fs_rm_xquota, |
| 277 | .get_dqblk = xfs_fs_get_dqblk, |
| 278 | .get_nextdqblk = xfs_fs_get_nextdqblk, |
| 279 | .set_dqblk = xfs_fs_set_dqblk, |
| 280 | }; |