| 1 | /* $NetBSD: ufs_quota.c,v 1.117 2014/06/28 22:27:51 dholland Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 1982, 1986, 1990, 1993, 1995 |
| 5 | * The Regents of the University of California. All rights reserved. |
| 6 | * |
| 7 | * This code is derived from software contributed to Berkeley by |
| 8 | * Robert Elz at The University of Melbourne. |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or without |
| 11 | * modification, are permitted provided that the following conditions |
| 12 | * are met: |
| 13 | * 1. Redistributions of source code must retain the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer. |
| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer in the |
| 17 | * documentation and/or other materials provided with the distribution. |
| 18 | * 3. Neither the name of the University nor the names of its contributors |
| 19 | * may be used to endorse or promote products derived from this software |
| 20 | * without specific prior written permission. |
| 21 | * |
| 22 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 32 | * SUCH DAMAGE. |
| 33 | * |
| 34 | * @(#)ufs_quota.c 8.5 (Berkeley) 5/20/95 |
| 35 | */ |
| 36 | |
| 37 | #include <sys/cdefs.h> |
| 38 | __KERNEL_RCSID(0, "$NetBSD: ufs_quota.c,v 1.117 2014/06/28 22:27:51 dholland Exp $" ); |
| 39 | |
| 40 | #if defined(_KERNEL_OPT) |
| 41 | #include "opt_quota.h" |
| 42 | #endif |
| 43 | #include <sys/param.h> |
| 44 | #include <sys/kernel.h> |
| 45 | #include <sys/systm.h> |
| 46 | #include <sys/namei.h> |
| 47 | #include <sys/file.h> |
| 48 | #include <sys/proc.h> |
| 49 | #include <sys/vnode.h> |
| 50 | #include <sys/mount.h> |
| 51 | #include <sys/kauth.h> |
| 52 | |
| 53 | #include <sys/quotactl.h> |
| 54 | #include <ufs/ufs/quota.h> |
| 55 | #include <ufs/ufs/inode.h> |
| 56 | #include <ufs/ufs/ufsmount.h> |
| 57 | #include <ufs/ufs/ufs_extern.h> |
| 58 | #include <ufs/ufs/ufs_quota.h> |
| 59 | |
| 60 | kmutex_t dqlock; |
| 61 | kcondvar_t dqcv; |
| 62 | const char *quotatypes[MAXQUOTAS] = INITQFNAMES; |
| 63 | |
| 64 | /* |
| 65 | * Code pertaining to management of the in-core dquot data structures. |
| 66 | */ |
| 67 | #define DQHASH(dqvp, id) \ |
| 68 | (((((long)(dqvp)) >> 8) + id) & dqhash) |
| 69 | static LIST_HEAD(dqhashhead, dquot) *dqhashtbl; |
| 70 | static u_long dqhash; |
| 71 | static pool_cache_t dquot_cache; |
| 72 | |
| 73 | |
| 74 | static int quota_handle_cmd_stat(struct mount *, struct lwp *, |
| 75 | struct quotactl_args *args); |
| 76 | static int quota_handle_cmd_idtypestat(struct mount *, struct lwp *, |
| 77 | struct quotactl_args *args); |
| 78 | static int quota_handle_cmd_objtypestat(struct mount *, struct lwp *, |
| 79 | struct quotactl_args *args); |
| 80 | static int quota_handle_cmd_get(struct mount *, struct lwp *, |
| 81 | struct quotactl_args *args); |
| 82 | static int quota_handle_cmd_put(struct mount *, struct lwp *, |
| 83 | struct quotactl_args *args); |
| 84 | static int quota_handle_cmd_cursorget(struct mount *, struct lwp *, |
| 85 | struct quotactl_args *args); |
| 86 | static int quota_handle_cmd_del(struct mount *, struct lwp *, |
| 87 | struct quotactl_args *args); |
| 88 | static int quota_handle_cmd_quotaon(struct mount *, struct lwp *, |
| 89 | struct quotactl_args *args); |
| 90 | static int quota_handle_cmd_quotaoff(struct mount *, struct lwp *, |
| 91 | struct quotactl_args *args); |
| 92 | static int quota_handle_cmd_cursoropen(struct mount *, struct lwp *, |
| 93 | struct quotactl_args *args); |
| 94 | static int quota_handle_cmd_cursorclose(struct mount *, struct lwp *, |
| 95 | struct quotactl_args *args); |
| 96 | static int quota_handle_cmd_cursorskipidtype(struct mount *, struct lwp *, |
| 97 | struct quotactl_args *args); |
| 98 | static int quota_handle_cmd_cursoratend(struct mount *, struct lwp *, |
| 99 | struct quotactl_args *args); |
| 100 | static int quota_handle_cmd_cursorrewind(struct mount *, struct lwp *, |
| 101 | struct quotactl_args *args); |
| 102 | |
| 103 | /* |
| 104 | * Initialize the quota fields of an inode. |
| 105 | */ |
| 106 | void |
| 107 | ufsquota_init(struct inode *ip) |
| 108 | { |
| 109 | int i; |
| 110 | |
| 111 | for (i = 0; i < MAXQUOTAS; i++) |
| 112 | ip->i_dquot[i] = NODQUOT; |
| 113 | } |
| 114 | |
| 115 | /* |
| 116 | * Release the quota fields from an inode. |
| 117 | */ |
| 118 | void |
| 119 | ufsquota_free(struct inode *ip) |
| 120 | { |
| 121 | int i; |
| 122 | |
| 123 | for (i = 0; i < MAXQUOTAS; i++) { |
| 124 | dqrele(ITOV(ip), ip->i_dquot[i]); |
| 125 | ip->i_dquot[i] = NODQUOT; |
| 126 | } |
| 127 | } |
| 128 | |
| 129 | /* |
| 130 | * Update disk usage, and take corrective action. |
| 131 | */ |
| 132 | int |
| 133 | chkdq(struct inode *ip, int64_t change, kauth_cred_t cred, int flags) |
| 134 | { |
| 135 | /* do not track snapshot usage, or we will deadlock */ |
| 136 | if ((ip->i_flags & SF_SNAPSHOT) != 0) |
| 137 | return 0; |
| 138 | |
| 139 | #ifdef QUOTA |
| 140 | if (ip->i_ump->um_flags & UFS_QUOTA) |
| 141 | return chkdq1(ip, change, cred, flags); |
| 142 | #endif |
| 143 | #ifdef QUOTA2 |
| 144 | if (ip->i_ump->um_flags & UFS_QUOTA2) |
| 145 | return chkdq2(ip, change, cred, flags); |
| 146 | #endif |
| 147 | return 0; |
| 148 | } |
| 149 | |
| 150 | /* |
| 151 | * Check the inode limit, applying corrective action. |
| 152 | */ |
| 153 | int |
| 154 | chkiq(struct inode *ip, int32_t change, kauth_cred_t cred, int flags) |
| 155 | { |
| 156 | /* do not track snapshot usage, or we will deadlock */ |
| 157 | if ((ip->i_flags & SF_SNAPSHOT) != 0) |
| 158 | return 0; |
| 159 | #ifdef QUOTA |
| 160 | if (ip->i_ump->um_flags & UFS_QUOTA) |
| 161 | return chkiq1(ip, change, cred, flags); |
| 162 | #endif |
| 163 | #ifdef QUOTA2 |
| 164 | if (ip->i_ump->um_flags & UFS_QUOTA2) |
| 165 | return chkiq2(ip, change, cred, flags); |
| 166 | #endif |
| 167 | return 0; |
| 168 | } |
| 169 | |
| 170 | int |
| 171 | quota_handle_cmd(struct mount *mp, struct lwp *l, |
| 172 | struct quotactl_args *args) |
| 173 | { |
| 174 | int error = 0; |
| 175 | |
| 176 | switch (args->qc_op) { |
| 177 | case QUOTACTL_STAT: |
| 178 | error = quota_handle_cmd_stat(mp, l, args); |
| 179 | break; |
| 180 | case QUOTACTL_IDTYPESTAT: |
| 181 | error = quota_handle_cmd_idtypestat(mp, l, args); |
| 182 | break; |
| 183 | case QUOTACTL_OBJTYPESTAT: |
| 184 | error = quota_handle_cmd_objtypestat(mp, l, args); |
| 185 | break; |
| 186 | case QUOTACTL_QUOTAON: |
| 187 | error = quota_handle_cmd_quotaon(mp, l, args); |
| 188 | break; |
| 189 | case QUOTACTL_QUOTAOFF: |
| 190 | error = quota_handle_cmd_quotaoff(mp, l, args); |
| 191 | break; |
| 192 | case QUOTACTL_GET: |
| 193 | error = quota_handle_cmd_get(mp, l, args); |
| 194 | break; |
| 195 | case QUOTACTL_PUT: |
| 196 | error = quota_handle_cmd_put(mp, l, args); |
| 197 | break; |
| 198 | case QUOTACTL_CURSORGET: |
| 199 | error = quota_handle_cmd_cursorget(mp, l, args); |
| 200 | break; |
| 201 | case QUOTACTL_DEL: |
| 202 | error = quota_handle_cmd_del(mp, l, args); |
| 203 | break; |
| 204 | case QUOTACTL_CURSOROPEN: |
| 205 | error = quota_handle_cmd_cursoropen(mp, l, args); |
| 206 | break; |
| 207 | case QUOTACTL_CURSORCLOSE: |
| 208 | error = quota_handle_cmd_cursorclose(mp, l, args); |
| 209 | break; |
| 210 | case QUOTACTL_CURSORSKIPIDTYPE: |
| 211 | error = quota_handle_cmd_cursorskipidtype(mp, l, args); |
| 212 | break; |
| 213 | case QUOTACTL_CURSORATEND: |
| 214 | error = quota_handle_cmd_cursoratend(mp, l, args); |
| 215 | break; |
| 216 | case QUOTACTL_CURSORREWIND: |
| 217 | error = quota_handle_cmd_cursorrewind(mp, l, args); |
| 218 | break; |
| 219 | default: |
| 220 | panic("Invalid quotactl operation %d\n" , args->qc_op); |
| 221 | } |
| 222 | |
| 223 | return error; |
| 224 | } |
| 225 | |
| 226 | static int |
| 227 | quota_handle_cmd_stat(struct mount *mp, struct lwp *l, |
| 228 | struct quotactl_args *args) |
| 229 | { |
| 230 | struct ufsmount *ump = VFSTOUFS(mp); |
| 231 | struct quotastat *info; |
| 232 | |
| 233 | KASSERT(args->qc_op == QUOTACTL_STAT); |
| 234 | info = args->u.stat.qc_info; |
| 235 | |
| 236 | if ((ump->um_flags & (UFS_QUOTA|UFS_QUOTA2)) == 0) |
| 237 | return EOPNOTSUPP; |
| 238 | |
| 239 | #ifdef QUOTA |
| 240 | if (ump->um_flags & UFS_QUOTA) { |
| 241 | strcpy(info->qs_implname, "ufs/ffs quota v1" ); |
| 242 | info->qs_numidtypes = MAXQUOTAS; |
| 243 | /* XXX no define for this */ |
| 244 | info->qs_numobjtypes = 2; |
| 245 | info->qs_restrictions = 0; |
| 246 | info->qs_restrictions |= QUOTA_RESTRICT_NEEDSQUOTACHECK; |
| 247 | info->qs_restrictions |= QUOTA_RESTRICT_UNIFORMGRACE; |
| 248 | info->qs_restrictions |= QUOTA_RESTRICT_32BIT; |
| 249 | } else |
| 250 | #endif |
| 251 | #ifdef QUOTA2 |
| 252 | if (ump->um_flags & UFS_QUOTA2) { |
| 253 | strcpy(info->qs_implname, "ufs/ffs quota v2" ); |
| 254 | info->qs_numidtypes = MAXQUOTAS; |
| 255 | info->qs_numobjtypes = N_QL; |
| 256 | info->qs_restrictions = 0; |
| 257 | } else |
| 258 | #endif |
| 259 | return EOPNOTSUPP; |
| 260 | |
| 261 | return 0; |
| 262 | } |
| 263 | |
| 264 | static int |
| 265 | quota_handle_cmd_idtypestat(struct mount *mp, struct lwp *l, |
| 266 | struct quotactl_args *args) |
| 267 | { |
| 268 | struct ufsmount *ump = VFSTOUFS(mp); |
| 269 | int idtype; |
| 270 | struct quotaidtypestat *info; |
| 271 | const char *name; |
| 272 | |
| 273 | KASSERT(args->qc_op == QUOTACTL_IDTYPESTAT); |
| 274 | idtype = args->u.idtypestat.qc_idtype; |
| 275 | info = args->u.idtypestat.qc_info; |
| 276 | |
| 277 | if ((ump->um_flags & (UFS_QUOTA|UFS_QUOTA2)) == 0) |
| 278 | return EOPNOTSUPP; |
| 279 | |
| 280 | /* |
| 281 | * These are the same for both QUOTA and QUOTA2. |
| 282 | */ |
| 283 | switch (idtype) { |
| 284 | case QUOTA_IDTYPE_USER: |
| 285 | name = "user" ; |
| 286 | break; |
| 287 | case QUOTA_IDTYPE_GROUP: |
| 288 | name = "group" ; |
| 289 | break; |
| 290 | default: |
| 291 | return EINVAL; |
| 292 | } |
| 293 | strlcpy(info->qis_name, name, sizeof(info->qis_name)); |
| 294 | return 0; |
| 295 | } |
| 296 | |
| 297 | static int |
| 298 | quota_handle_cmd_objtypestat(struct mount *mp, struct lwp *l, |
| 299 | struct quotactl_args *args) |
| 300 | { |
| 301 | struct ufsmount *ump = VFSTOUFS(mp); |
| 302 | int objtype; |
| 303 | struct quotaobjtypestat *info; |
| 304 | const char *name; |
| 305 | int isbytes; |
| 306 | |
| 307 | KASSERT(args->qc_op == QUOTACTL_OBJTYPESTAT); |
| 308 | objtype = args->u.objtypestat.qc_objtype; |
| 309 | info = args->u.objtypestat.qc_info; |
| 310 | |
| 311 | if ((ump->um_flags & (UFS_QUOTA|UFS_QUOTA2)) == 0) |
| 312 | return EOPNOTSUPP; |
| 313 | |
| 314 | /* |
| 315 | * These are the same for both QUOTA and QUOTA2. |
| 316 | */ |
| 317 | switch (objtype) { |
| 318 | case QUOTA_OBJTYPE_BLOCKS: |
| 319 | name = "block" ; |
| 320 | isbytes = 1; |
| 321 | break; |
| 322 | case QUOTA_OBJTYPE_FILES: |
| 323 | name = "file" ; |
| 324 | isbytes = 0; |
| 325 | break; |
| 326 | default: |
| 327 | return EINVAL; |
| 328 | } |
| 329 | strlcpy(info->qos_name, name, sizeof(info->qos_name)); |
| 330 | info->qos_isbytes = isbytes; |
| 331 | return 0; |
| 332 | } |
| 333 | |
| 334 | /* XXX shouldn't all this be in kauth ? */ |
| 335 | static int |
| 336 | quota_get_auth(struct mount *mp, struct lwp *l, uid_t id) { |
| 337 | /* The user can always query about his own quota. */ |
| 338 | if (id == kauth_cred_geteuid(l->l_cred)) |
| 339 | return 0; |
| 340 | return kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_FS_QUOTA, |
| 341 | KAUTH_REQ_SYSTEM_FS_QUOTA_GET, mp, KAUTH_ARG(id), NULL); |
| 342 | } |
| 343 | |
| 344 | static int |
| 345 | quota_handle_cmd_get(struct mount *mp, struct lwp *l, |
| 346 | struct quotactl_args *args) |
| 347 | { |
| 348 | struct ufsmount *ump = VFSTOUFS(mp); |
| 349 | int error; |
| 350 | const struct quotakey *qk; |
| 351 | struct quotaval *qv; |
| 352 | |
| 353 | KASSERT(args->qc_op == QUOTACTL_GET); |
| 354 | qk = args->u.get.qc_key; |
| 355 | qv = args->u.get.qc_val; |
| 356 | |
| 357 | if ((ump->um_flags & (UFS_QUOTA|UFS_QUOTA2)) == 0) |
| 358 | return EOPNOTSUPP; |
| 359 | |
| 360 | error = quota_get_auth(mp, l, qk->qk_id); |
| 361 | if (error != 0) |
| 362 | return error; |
| 363 | #ifdef QUOTA |
| 364 | if (ump->um_flags & UFS_QUOTA) { |
| 365 | error = quota1_handle_cmd_get(ump, qk, qv); |
| 366 | } else |
| 367 | #endif |
| 368 | #ifdef QUOTA2 |
| 369 | if (ump->um_flags & UFS_QUOTA2) { |
| 370 | error = quota2_handle_cmd_get(ump, qk, qv); |
| 371 | } else |
| 372 | #endif |
| 373 | panic("quota_handle_cmd_get: no support ?" ); |
| 374 | |
| 375 | if (error != 0) |
| 376 | return error; |
| 377 | |
| 378 | return error; |
| 379 | } |
| 380 | |
| 381 | static int |
| 382 | quota_handle_cmd_put(struct mount *mp, struct lwp *l, |
| 383 | struct quotactl_args *args) |
| 384 | { |
| 385 | struct ufsmount *ump = VFSTOUFS(mp); |
| 386 | const struct quotakey *qk; |
| 387 | const struct quotaval *qv; |
| 388 | id_t kauth_id; |
| 389 | int error; |
| 390 | |
| 391 | KASSERT(args->qc_op == QUOTACTL_PUT); |
| 392 | qk = args->u.put.qc_key; |
| 393 | qv = args->u.put.qc_val; |
| 394 | |
| 395 | if ((ump->um_flags & (UFS_QUOTA|UFS_QUOTA2)) == 0) |
| 396 | return EOPNOTSUPP; |
| 397 | |
| 398 | kauth_id = qk->qk_id; |
| 399 | if (kauth_id == QUOTA_DEFAULTID) { |
| 400 | kauth_id = 0; |
| 401 | } |
| 402 | |
| 403 | error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_FS_QUOTA, |
| 404 | KAUTH_REQ_SYSTEM_FS_QUOTA_MANAGE, mp, KAUTH_ARG(kauth_id), |
| 405 | NULL); |
| 406 | if (error != 0) { |
| 407 | return error; |
| 408 | } |
| 409 | |
| 410 | #ifdef QUOTA |
| 411 | if (ump->um_flags & UFS_QUOTA) |
| 412 | error = quota1_handle_cmd_put(ump, qk, qv); |
| 413 | else |
| 414 | #endif |
| 415 | #ifdef QUOTA2 |
| 416 | if (ump->um_flags & UFS_QUOTA2) { |
| 417 | error = quota2_handle_cmd_put(ump, qk, qv); |
| 418 | } else |
| 419 | #endif |
| 420 | panic("quota_handle_cmd_get: no support ?" ); |
| 421 | |
| 422 | if (error == ENOENT) { |
| 423 | error = 0; |
| 424 | } |
| 425 | |
| 426 | return error; |
| 427 | } |
| 428 | |
| 429 | static int |
| 430 | quota_handle_cmd_del(struct mount *mp, struct lwp *l, |
| 431 | struct quotactl_args *args) |
| 432 | { |
| 433 | struct ufsmount *ump = VFSTOUFS(mp); |
| 434 | const struct quotakey *qk; |
| 435 | id_t kauth_id; |
| 436 | int error; |
| 437 | |
| 438 | KASSERT(args->qc_op == QUOTACTL_DEL); |
| 439 | qk = args->u.del.qc_key; |
| 440 | |
| 441 | kauth_id = qk->qk_id; |
| 442 | if (kauth_id == QUOTA_DEFAULTID) { |
| 443 | kauth_id = 0; |
| 444 | } |
| 445 | |
| 446 | if ((ump->um_flags & UFS_QUOTA2) == 0) |
| 447 | return EOPNOTSUPP; |
| 448 | |
| 449 | /* avoid whitespace changes */ |
| 450 | { |
| 451 | error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_FS_QUOTA, |
| 452 | KAUTH_REQ_SYSTEM_FS_QUOTA_MANAGE, mp, KAUTH_ARG(kauth_id), |
| 453 | NULL); |
| 454 | if (error != 0) |
| 455 | goto err; |
| 456 | #ifdef QUOTA2 |
| 457 | if (ump->um_flags & UFS_QUOTA2) { |
| 458 | error = quota2_handle_cmd_del(ump, qk); |
| 459 | } else |
| 460 | #endif |
| 461 | panic("quota_handle_cmd_get: no support ?" ); |
| 462 | |
| 463 | if (error && error != ENOENT) |
| 464 | goto err; |
| 465 | } |
| 466 | |
| 467 | return 0; |
| 468 | err: |
| 469 | return error; |
| 470 | } |
| 471 | |
| 472 | static int |
| 473 | quota_handle_cmd_cursorget(struct mount *mp, struct lwp *l, |
| 474 | struct quotactl_args *args) |
| 475 | { |
| 476 | struct ufsmount *ump = VFSTOUFS(mp); |
| 477 | int error; |
| 478 | |
| 479 | KASSERT(args->qc_op == QUOTACTL_CURSORGET); |
| 480 | |
| 481 | if ((ump->um_flags & UFS_QUOTA2) == 0) |
| 482 | return EOPNOTSUPP; |
| 483 | |
| 484 | error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_FS_QUOTA, |
| 485 | KAUTH_REQ_SYSTEM_FS_QUOTA_GET, mp, NULL, NULL); |
| 486 | if (error) |
| 487 | return error; |
| 488 | |
| 489 | #ifdef QUOTA2 |
| 490 | if (ump->um_flags & UFS_QUOTA2) { |
| 491 | struct quotakcursor *cursor = args->u.cursorget.qc_cursor; |
| 492 | struct quotakey *keys = args->u.cursorget.qc_keys; |
| 493 | struct quotaval *vals = args->u.cursorget.qc_vals; |
| 494 | unsigned maxnum = args->u.cursorget.qc_maxnum; |
| 495 | unsigned *ret = args->u.cursorget.qc_ret; |
| 496 | |
| 497 | error = quota2_handle_cmd_cursorget(ump, cursor, keys, vals, |
| 498 | maxnum, ret); |
| 499 | } else |
| 500 | #endif |
| 501 | panic("quota_handle_cmd_cursorget: no support ?" ); |
| 502 | |
| 503 | return error; |
| 504 | } |
| 505 | |
| 506 | static int |
| 507 | quota_handle_cmd_cursoropen(struct mount *mp, struct lwp *l, |
| 508 | struct quotactl_args *args) |
| 509 | { |
| 510 | #ifdef QUOTA2 |
| 511 | struct ufsmount *ump = VFSTOUFS(mp); |
| 512 | struct quotakcursor *cursor = args->u.cursoropen.qc_cursor; |
| 513 | #endif |
| 514 | int error; |
| 515 | |
| 516 | KASSERT(args->qc_op == QUOTACTL_CURSOROPEN); |
| 517 | |
| 518 | error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_FS_QUOTA, |
| 519 | KAUTH_REQ_SYSTEM_FS_QUOTA_GET, mp, NULL, NULL); |
| 520 | if (error) |
| 521 | return error; |
| 522 | |
| 523 | #ifdef QUOTA2 |
| 524 | if (ump->um_flags & UFS_QUOTA2) { |
| 525 | error = quota2_handle_cmd_cursoropen(ump, cursor); |
| 526 | } else |
| 527 | #endif |
| 528 | error = EOPNOTSUPP; |
| 529 | |
| 530 | return error; |
| 531 | } |
| 532 | |
| 533 | static int |
| 534 | quota_handle_cmd_cursorclose(struct mount *mp, struct lwp *l, |
| 535 | struct quotactl_args *args) |
| 536 | { |
| 537 | #ifdef QUOTA2 |
| 538 | struct ufsmount *ump = VFSTOUFS(mp); |
| 539 | struct quotakcursor *cursor = args->u.cursorclose.qc_cursor; |
| 540 | #endif |
| 541 | int error; |
| 542 | |
| 543 | KASSERT(args->qc_op == QUOTACTL_CURSORCLOSE); |
| 544 | |
| 545 | error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_FS_QUOTA, |
| 546 | KAUTH_REQ_SYSTEM_FS_QUOTA_GET, mp, NULL, NULL); |
| 547 | if (error) |
| 548 | return error; |
| 549 | |
| 550 | #ifdef QUOTA2 |
| 551 | if (ump->um_flags & UFS_QUOTA2) { |
| 552 | error = quota2_handle_cmd_cursorclose(ump, cursor); |
| 553 | } else |
| 554 | #endif |
| 555 | error = EOPNOTSUPP; |
| 556 | |
| 557 | return error; |
| 558 | } |
| 559 | |
| 560 | static int |
| 561 | quota_handle_cmd_cursorskipidtype(struct mount *mp, struct lwp *l, |
| 562 | struct quotactl_args *args) |
| 563 | { |
| 564 | #ifdef QUOTA2 |
| 565 | struct ufsmount *ump = VFSTOUFS(mp); |
| 566 | struct quotakcursor *cursor = args->u.cursorskipidtype.qc_cursor; |
| 567 | int idtype = args->u.cursorskipidtype.qc_idtype; |
| 568 | #endif |
| 569 | int error; |
| 570 | |
| 571 | KASSERT(args->qc_op == QUOTACTL_CURSORSKIPIDTYPE); |
| 572 | |
| 573 | #ifdef QUOTA2 |
| 574 | if (ump->um_flags & UFS_QUOTA2) { |
| 575 | error = quota2_handle_cmd_cursorskipidtype(ump, cursor, idtype); |
| 576 | } else |
| 577 | #endif |
| 578 | error = EOPNOTSUPP; |
| 579 | |
| 580 | return error; |
| 581 | } |
| 582 | |
| 583 | static int |
| 584 | quota_handle_cmd_cursoratend(struct mount *mp, struct lwp *l, |
| 585 | struct quotactl_args *args) |
| 586 | { |
| 587 | #ifdef QUOTA2 |
| 588 | struct ufsmount *ump = VFSTOUFS(mp); |
| 589 | struct quotakcursor *cursor = args->u.cursoratend.qc_cursor; |
| 590 | unsigned *ret = args->u.cursoratend.qc_ret; |
| 591 | #endif |
| 592 | int error; |
| 593 | |
| 594 | KASSERT(args->qc_op == QUOTACTL_CURSORATEND); |
| 595 | |
| 596 | #ifdef QUOTA2 |
| 597 | if (ump->um_flags & UFS_QUOTA2) { |
| 598 | error = quota2_handle_cmd_cursoratend(ump, cursor, ret); |
| 599 | } else |
| 600 | #endif |
| 601 | error = EOPNOTSUPP; |
| 602 | |
| 603 | return error; |
| 604 | } |
| 605 | |
| 606 | static int |
| 607 | quota_handle_cmd_cursorrewind(struct mount *mp, struct lwp *l, |
| 608 | struct quotactl_args *args) |
| 609 | { |
| 610 | #ifdef QUOTA2 |
| 611 | struct ufsmount *ump = VFSTOUFS(mp); |
| 612 | struct quotakcursor *cursor = args->u.cursorrewind.qc_cursor; |
| 613 | #endif |
| 614 | int error; |
| 615 | |
| 616 | KASSERT(args->qc_op == QUOTACTL_CURSORREWIND); |
| 617 | |
| 618 | #ifdef QUOTA2 |
| 619 | if (ump->um_flags & UFS_QUOTA2) { |
| 620 | error = quota2_handle_cmd_cursorrewind(ump, cursor); |
| 621 | } else |
| 622 | #endif |
| 623 | error = EOPNOTSUPP; |
| 624 | |
| 625 | return error; |
| 626 | } |
| 627 | |
| 628 | static int |
| 629 | quota_handle_cmd_quotaon(struct mount *mp, struct lwp *l, |
| 630 | struct quotactl_args *args) |
| 631 | { |
| 632 | struct ufsmount *ump = VFSTOUFS(mp); |
| 633 | int error; |
| 634 | |
| 635 | KASSERT(args->qc_op == QUOTACTL_QUOTAON); |
| 636 | |
| 637 | if ((ump->um_flags & UFS_QUOTA2) != 0) |
| 638 | return EBUSY; |
| 639 | |
| 640 | error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_FS_QUOTA, |
| 641 | KAUTH_REQ_SYSTEM_FS_QUOTA_ONOFF, mp, NULL, NULL); |
| 642 | if (error != 0) { |
| 643 | return error; |
| 644 | } |
| 645 | #ifdef QUOTA |
| 646 | int idtype = args->u.quotaon.qc_idtype; |
| 647 | const char *qfile = args->u.quotaon.qc_quotafile; |
| 648 | error = quota1_handle_cmd_quotaon(l, ump, idtype, qfile); |
| 649 | #else |
| 650 | error = EOPNOTSUPP; |
| 651 | #endif |
| 652 | |
| 653 | return error; |
| 654 | } |
| 655 | |
| 656 | static int |
| 657 | quota_handle_cmd_quotaoff(struct mount *mp, struct lwp *l, |
| 658 | struct quotactl_args *args) |
| 659 | { |
| 660 | struct ufsmount *ump = VFSTOUFS(mp); |
| 661 | int error; |
| 662 | |
| 663 | KASSERT(args->qc_op == QUOTACTL_QUOTAOFF); |
| 664 | |
| 665 | if ((ump->um_flags & UFS_QUOTA2) != 0) |
| 666 | return EOPNOTSUPP; |
| 667 | |
| 668 | error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_FS_QUOTA, |
| 669 | KAUTH_REQ_SYSTEM_FS_QUOTA_ONOFF, mp, NULL, NULL); |
| 670 | if (error != 0) { |
| 671 | return error; |
| 672 | } |
| 673 | #ifdef QUOTA |
| 674 | int idtype = args->u.quotaoff.qc_idtype; |
| 675 | error = quota1_handle_cmd_quotaoff(l, ump, idtype); |
| 676 | #else |
| 677 | error = EOPNOTSUPP; |
| 678 | #endif |
| 679 | |
| 680 | return error; |
| 681 | } |
| 682 | |
| 683 | /* |
| 684 | * Initialize the quota system. |
| 685 | */ |
| 686 | void |
| 687 | dqinit(void) |
| 688 | { |
| 689 | |
| 690 | mutex_init(&dqlock, MUTEX_DEFAULT, IPL_NONE); |
| 691 | cv_init(&dqcv, "quota" ); |
| 692 | dqhashtbl = hashinit(desiredvnodes, HASH_LIST, true, &dqhash); |
| 693 | dquot_cache = pool_cache_init(sizeof(struct dquot), 0, 0, 0, "ufsdq" , |
| 694 | NULL, IPL_NONE, NULL, NULL, NULL); |
| 695 | } |
| 696 | |
| 697 | void |
| 698 | dqreinit(void) |
| 699 | { |
| 700 | struct dquot *dq; |
| 701 | struct dqhashhead *oldhash, *hash; |
| 702 | struct vnode *dqvp; |
| 703 | u_long oldmask, mask, hashval; |
| 704 | int i; |
| 705 | |
| 706 | hash = hashinit(desiredvnodes, HASH_LIST, true, &mask); |
| 707 | mutex_enter(&dqlock); |
| 708 | oldhash = dqhashtbl; |
| 709 | oldmask = dqhash; |
| 710 | dqhashtbl = hash; |
| 711 | dqhash = mask; |
| 712 | for (i = 0; i <= oldmask; i++) { |
| 713 | while ((dq = LIST_FIRST(&oldhash[i])) != NULL) { |
| 714 | dqvp = dq->dq_ump->um_quotas[dq->dq_type]; |
| 715 | LIST_REMOVE(dq, dq_hash); |
| 716 | hashval = DQHASH(dqvp, dq->dq_id); |
| 717 | LIST_INSERT_HEAD(&dqhashtbl[hashval], dq, dq_hash); |
| 718 | } |
| 719 | } |
| 720 | mutex_exit(&dqlock); |
| 721 | hashdone(oldhash, HASH_LIST, oldmask); |
| 722 | } |
| 723 | |
| 724 | /* |
| 725 | * Free resources held by quota system. |
| 726 | */ |
| 727 | void |
| 728 | dqdone(void) |
| 729 | { |
| 730 | |
| 731 | pool_cache_destroy(dquot_cache); |
| 732 | hashdone(dqhashtbl, HASH_LIST, dqhash); |
| 733 | cv_destroy(&dqcv); |
| 734 | mutex_destroy(&dqlock); |
| 735 | } |
| 736 | |
| 737 | /* |
| 738 | * Set up the quotas for an inode. |
| 739 | * |
| 740 | * This routine completely defines the semantics of quotas. |
| 741 | * If other criterion want to be used to establish quotas, the |
| 742 | * MAXQUOTAS value in quotas.h should be increased, and the |
| 743 | * additional dquots set up here. |
| 744 | */ |
| 745 | int |
| 746 | getinoquota(struct inode *ip) |
| 747 | { |
| 748 | struct ufsmount *ump = ip->i_ump; |
| 749 | struct vnode *vp = ITOV(ip); |
| 750 | int i, error; |
| 751 | u_int32_t ino_ids[MAXQUOTAS]; |
| 752 | |
| 753 | /* |
| 754 | * To avoid deadlocks never update quotas for quota files |
| 755 | * on the same file system |
| 756 | */ |
| 757 | for (i = 0; i < MAXQUOTAS; i++) |
| 758 | if (vp == ump->um_quotas[i]) |
| 759 | return 0; |
| 760 | |
| 761 | ino_ids[USRQUOTA] = ip->i_uid; |
| 762 | ino_ids[GRPQUOTA] = ip->i_gid; |
| 763 | for (i = 0; i < MAXQUOTAS; i++) { |
| 764 | /* |
| 765 | * If the file id changed the quota needs update. |
| 766 | */ |
| 767 | if (ip->i_dquot[i] != NODQUOT && |
| 768 | ip->i_dquot[i]->dq_id != ino_ids[i]) { |
| 769 | dqrele(ITOV(ip), ip->i_dquot[i]); |
| 770 | ip->i_dquot[i] = NODQUOT; |
| 771 | } |
| 772 | /* |
| 773 | * Set up the quota based on file id. |
| 774 | * ENODEV means that quotas are not enabled. |
| 775 | */ |
| 776 | if (ip->i_dquot[i] == NODQUOT && |
| 777 | (error = dqget(vp, ino_ids[i], ump, i, &ip->i_dquot[i])) && |
| 778 | error != ENODEV) |
| 779 | return (error); |
| 780 | } |
| 781 | return 0; |
| 782 | } |
| 783 | |
| 784 | /* |
| 785 | * Obtain a dquot structure for the specified identifier and quota file |
| 786 | * reading the information from the file if necessary. |
| 787 | */ |
| 788 | int |
| 789 | dqget(struct vnode *vp, u_long id, struct ufsmount *ump, int type, |
| 790 | struct dquot **dqp) |
| 791 | { |
| 792 | struct dquot *dq, *ndq; |
| 793 | struct dqhashhead *dqh; |
| 794 | struct vnode *dqvp; |
| 795 | int error = 0; /* XXX gcc */ |
| 796 | |
| 797 | /* Lock to see an up to date value for QTF_CLOSING. */ |
| 798 | mutex_enter(&dqlock); |
| 799 | if ((ump->um_flags & (UFS_QUOTA|UFS_QUOTA2)) == 0) { |
| 800 | mutex_exit(&dqlock); |
| 801 | *dqp = NODQUOT; |
| 802 | return (ENODEV); |
| 803 | } |
| 804 | dqvp = ump->um_quotas[type]; |
| 805 | #ifdef QUOTA |
| 806 | if (ump->um_flags & UFS_QUOTA) { |
| 807 | if (dqvp == NULLVP || (ump->umq1_qflags[type] & QTF_CLOSING)) { |
| 808 | mutex_exit(&dqlock); |
| 809 | *dqp = NODQUOT; |
| 810 | return (ENODEV); |
| 811 | } |
| 812 | } |
| 813 | #endif |
| 814 | #ifdef QUOTA2 |
| 815 | if (ump->um_flags & UFS_QUOTA2) { |
| 816 | if (dqvp == NULLVP) { |
| 817 | mutex_exit(&dqlock); |
| 818 | *dqp = NODQUOT; |
| 819 | return (ENODEV); |
| 820 | } |
| 821 | } |
| 822 | #endif |
| 823 | KASSERT(dqvp != vp); |
| 824 | /* |
| 825 | * Check the cache first. |
| 826 | */ |
| 827 | dqh = &dqhashtbl[DQHASH(dqvp, id)]; |
| 828 | LIST_FOREACH(dq, dqh, dq_hash) { |
| 829 | if (dq->dq_id != id || |
| 830 | dq->dq_ump->um_quotas[dq->dq_type] != dqvp) |
| 831 | continue; |
| 832 | KASSERT(dq->dq_cnt > 0); |
| 833 | dqref(dq); |
| 834 | mutex_exit(&dqlock); |
| 835 | *dqp = dq; |
| 836 | return (0); |
| 837 | } |
| 838 | /* |
| 839 | * Not in cache, allocate a new one. |
| 840 | */ |
| 841 | mutex_exit(&dqlock); |
| 842 | ndq = pool_cache_get(dquot_cache, PR_WAITOK); |
| 843 | /* |
| 844 | * Initialize the contents of the dquot structure. |
| 845 | */ |
| 846 | memset((char *)ndq, 0, sizeof *ndq); |
| 847 | ndq->dq_flags = 0; |
| 848 | ndq->dq_id = id; |
| 849 | ndq->dq_ump = ump; |
| 850 | ndq->dq_type = type; |
| 851 | mutex_init(&ndq->dq_interlock, MUTEX_DEFAULT, IPL_NONE); |
| 852 | mutex_enter(&dqlock); |
| 853 | dqh = &dqhashtbl[DQHASH(dqvp, id)]; |
| 854 | LIST_FOREACH(dq, dqh, dq_hash) { |
| 855 | if (dq->dq_id != id || |
| 856 | dq->dq_ump->um_quotas[dq->dq_type] != dqvp) |
| 857 | continue; |
| 858 | /* |
| 859 | * Another thread beat us allocating this dquot. |
| 860 | */ |
| 861 | KASSERT(dq->dq_cnt > 0); |
| 862 | dqref(dq); |
| 863 | mutex_exit(&dqlock); |
| 864 | mutex_destroy(&ndq->dq_interlock); |
| 865 | pool_cache_put(dquot_cache, ndq); |
| 866 | *dqp = dq; |
| 867 | return 0; |
| 868 | } |
| 869 | dq = ndq; |
| 870 | LIST_INSERT_HEAD(dqh, dq, dq_hash); |
| 871 | dqref(dq); |
| 872 | mutex_enter(&dq->dq_interlock); |
| 873 | mutex_exit(&dqlock); |
| 874 | #ifdef QUOTA |
| 875 | if (ump->um_flags & UFS_QUOTA) |
| 876 | error = dq1get(dqvp, id, ump, type, dq); |
| 877 | #endif |
| 878 | #ifdef QUOTA2 |
| 879 | if (ump->um_flags & UFS_QUOTA2) |
| 880 | error = dq2get(dqvp, id, ump, type, dq); |
| 881 | #endif |
| 882 | /* |
| 883 | * I/O error in reading quota file, release |
| 884 | * quota structure and reflect problem to caller. |
| 885 | */ |
| 886 | if (error) { |
| 887 | mutex_enter(&dqlock); |
| 888 | LIST_REMOVE(dq, dq_hash); |
| 889 | mutex_exit(&dqlock); |
| 890 | mutex_exit(&dq->dq_interlock); |
| 891 | dqrele(vp, dq); |
| 892 | *dqp = NODQUOT; |
| 893 | return (error); |
| 894 | } |
| 895 | mutex_exit(&dq->dq_interlock); |
| 896 | *dqp = dq; |
| 897 | return (0); |
| 898 | } |
| 899 | |
| 900 | /* |
| 901 | * Obtain a reference to a dquot. |
| 902 | */ |
| 903 | void |
| 904 | dqref(struct dquot *dq) |
| 905 | { |
| 906 | |
| 907 | KASSERT(mutex_owned(&dqlock)); |
| 908 | dq->dq_cnt++; |
| 909 | KASSERT(dq->dq_cnt > 0); |
| 910 | } |
| 911 | |
| 912 | /* |
| 913 | * Release a reference to a dquot. |
| 914 | */ |
| 915 | void |
| 916 | dqrele(struct vnode *vp, struct dquot *dq) |
| 917 | { |
| 918 | |
| 919 | if (dq == NODQUOT) |
| 920 | return; |
| 921 | mutex_enter(&dq->dq_interlock); |
| 922 | for (;;) { |
| 923 | mutex_enter(&dqlock); |
| 924 | if (dq->dq_cnt > 1) { |
| 925 | dq->dq_cnt--; |
| 926 | mutex_exit(&dqlock); |
| 927 | mutex_exit(&dq->dq_interlock); |
| 928 | return; |
| 929 | } |
| 930 | if ((dq->dq_flags & DQ_MOD) == 0) |
| 931 | break; |
| 932 | mutex_exit(&dqlock); |
| 933 | #ifdef QUOTA |
| 934 | if (dq->dq_ump->um_flags & UFS_QUOTA) |
| 935 | (void) dq1sync(vp, dq); |
| 936 | #endif |
| 937 | #ifdef QUOTA2 |
| 938 | if (dq->dq_ump->um_flags & UFS_QUOTA2) |
| 939 | (void) dq2sync(vp, dq); |
| 940 | #endif |
| 941 | } |
| 942 | KASSERT(dq->dq_cnt == 1 && (dq->dq_flags & DQ_MOD) == 0); |
| 943 | LIST_REMOVE(dq, dq_hash); |
| 944 | mutex_exit(&dqlock); |
| 945 | mutex_exit(&dq->dq_interlock); |
| 946 | mutex_destroy(&dq->dq_interlock); |
| 947 | pool_cache_put(dquot_cache, dq); |
| 948 | } |
| 949 | |
| 950 | int |
| 951 | qsync(struct mount *mp) |
| 952 | { |
| 953 | struct ufsmount *ump = VFSTOUFS(mp); |
| 954 | #ifdef QUOTA |
| 955 | if (ump->um_flags & UFS_QUOTA) |
| 956 | return q1sync(mp); |
| 957 | #endif |
| 958 | #ifdef QUOTA2 |
| 959 | if (ump->um_flags & UFS_QUOTA2) |
| 960 | return q2sync(mp); |
| 961 | #endif |
| 962 | return 0; |
| 963 | } |
| 964 | |
| 965 | #ifdef DIAGNOSTIC |
| 966 | /* |
| 967 | * Check the hash chains for stray dquot's. |
| 968 | */ |
| 969 | void |
| 970 | dqflush(struct vnode *vp) |
| 971 | { |
| 972 | struct dquot *dq; |
| 973 | int i; |
| 974 | |
| 975 | mutex_enter(&dqlock); |
| 976 | for (i = 0; i <= dqhash; i++) |
| 977 | LIST_FOREACH(dq, &dqhashtbl[i], dq_hash) |
| 978 | KASSERT(dq->dq_ump->um_quotas[dq->dq_type] != vp); |
| 979 | mutex_exit(&dqlock); |
| 980 | } |
| 981 | #endif |
| 982 | |