1/* $NetBSD: ulfs_quota.c,v 1.13 2016/06/19 23:06:09 dholland Exp $ */ 2/* from NetBSD: ufs_quota.c,v 1.117 2014/06/28 22:27:51 dholland Exp */ 3 4/* 5 * Copyright (c) 1982, 1986, 1990, 1993, 1995 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Robert Elz at The University of Melbourne. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)ufs_quota.c 8.5 (Berkeley) 5/20/95 36 */ 37 38#include <sys/cdefs.h> 39__KERNEL_RCSID(0, "$NetBSD: ulfs_quota.c,v 1.13 2016/06/19 23:06:09 dholland Exp $"); 40 41#if defined(_KERNEL_OPT) 42#include "opt_quota.h" 43#endif 44#include <sys/param.h> 45#include <sys/kernel.h> 46#include <sys/systm.h> 47#include <sys/namei.h> 48#include <sys/file.h> 49#include <sys/proc.h> 50#include <sys/vnode.h> 51#include <sys/mount.h> 52#include <sys/kauth.h> 53 54#include <sys/quotactl.h> 55#include <ufs/lfs/ulfs_quotacommon.h> 56#include <ufs/lfs/ulfs_inode.h> 57#include <ufs/lfs/ulfsmount.h> 58#include <ufs/lfs/ulfs_extern.h> 59#include <ufs/lfs/ulfs_quota.h> 60 61kmutex_t lfs_dqlock; 62kcondvar_t lfs_dqcv; 63const char *lfs_quotatypes[ULFS_MAXQUOTAS] = INITQFNAMES; 64 65/* 66 * Code pertaining to management of the in-core dquot data structures. 67 */ 68#define DQHASH(dqvp, id) \ 69 (((((long)(dqvp)) >> 8) + id) & dqhash) 70static LIST_HEAD(dqhashhead, dquot) *dqhashtbl; 71static u_long dqhash; 72static pool_cache_t dquot_cache; 73 74 75static int quota_handle_cmd_stat(struct mount *, struct lwp *, 76 struct quotactl_args *args); 77static int quota_handle_cmd_idtypestat(struct mount *, struct lwp *, 78 struct quotactl_args *args); 79static int quota_handle_cmd_objtypestat(struct mount *, struct lwp *, 80 struct quotactl_args *args); 81static int quota_handle_cmd_get(struct mount *, struct lwp *, 82 struct quotactl_args *args); 83static int quota_handle_cmd_put(struct mount *, struct lwp *, 84 struct quotactl_args *args); 85static int quota_handle_cmd_cursorget(struct mount *, struct lwp *, 86 struct quotactl_args *args); 87static int quota_handle_cmd_del(struct mount *, struct lwp *, 88 struct quotactl_args *args); 89static int quota_handle_cmd_quotaon(struct mount *, struct lwp *, 90 struct quotactl_args *args); 91static int quota_handle_cmd_quotaoff(struct mount *, struct lwp *, 92 struct quotactl_args *args); 93static int quota_handle_cmd_cursoropen(struct mount *, struct lwp *, 94 struct quotactl_args *args); 95static int quota_handle_cmd_cursorclose(struct mount *, struct lwp *, 96 struct quotactl_args *args); 97static int quota_handle_cmd_cursorskipidtype(struct mount *, struct lwp *, 98 struct quotactl_args *args); 99static int quota_handle_cmd_cursoratend(struct mount *, struct lwp *, 100 struct quotactl_args *args); 101static int quota_handle_cmd_cursorrewind(struct mount *, struct lwp *, 102 struct quotactl_args *args); 103 104/* 105 * Initialize the quota fields of an inode. 106 */ 107void 108ulfsquota_init(struct inode *ip) 109{ 110 int i; 111 112 for (i = 0; i < ULFS_MAXQUOTAS; i++) 113 ip->i_dquot[i] = NODQUOT; 114} 115 116/* 117 * Release the quota fields from an inode. 118 */ 119void 120ulfsquota_free(struct inode *ip) 121{ 122 int i; 123 124 for (i = 0; i < ULFS_MAXQUOTAS; i++) { 125 lfs_dqrele(ITOV(ip), ip->i_dquot[i]); 126 ip->i_dquot[i] = NODQUOT; 127 } 128} 129 130/* 131 * Update disk usage, and take corrective action. 132 */ 133int 134lfs_chkdq(struct inode *ip, int64_t change, kauth_cred_t cred, int flags) 135{ 136 /* do not track snapshot usage, or we will deadlock */ 137 if ((ip->i_flags & SF_SNAPSHOT) != 0) 138 return 0; 139 140#ifdef LFS_QUOTA 141 if (ip->i_lfs->um_flags & ULFS_QUOTA) 142 return lfs_chkdq1(ip, change, cred, flags); 143#endif 144#ifdef LFS_QUOTA2 145 if (ip->i_lfs->um_flags & ULFS_QUOTA2) 146 return lfs_chkdq2(ip, change, cred, flags); 147#endif 148 return 0; 149} 150 151/* 152 * Check the inode limit, applying corrective action. 153 */ 154int 155lfs_chkiq(struct inode *ip, int32_t change, kauth_cred_t cred, int flags) 156{ 157 /* do not track snapshot usage, or we will deadlock */ 158 if ((ip->i_flags & SF_SNAPSHOT) != 0) 159 return 0; 160#ifdef LFS_QUOTA 161 if (ip->i_lfs->um_flags & ULFS_QUOTA) 162 return lfs_chkiq1(ip, change, cred, flags); 163#endif 164#ifdef LFS_QUOTA2 165 if (ip->i_lfs->um_flags & ULFS_QUOTA2) 166 return lfs_chkiq2(ip, change, cred, flags); 167#endif 168 return 0; 169} 170 171int 172lfsquota_handle_cmd(struct mount *mp, struct lwp *l, 173 struct quotactl_args *args) 174{ 175 int error = 0; 176 177 switch (args->qc_op) { 178 case QUOTACTL_STAT: 179 error = quota_handle_cmd_stat(mp, l, args); 180 break; 181 case QUOTACTL_IDTYPESTAT: 182 error = quota_handle_cmd_idtypestat(mp, l, args); 183 break; 184 case QUOTACTL_OBJTYPESTAT: 185 error = quota_handle_cmd_objtypestat(mp, l, args); 186 break; 187 case QUOTACTL_QUOTAON: 188 error = quota_handle_cmd_quotaon(mp, l, args); 189 break; 190 case QUOTACTL_QUOTAOFF: 191 error = quota_handle_cmd_quotaoff(mp, l, args); 192 break; 193 case QUOTACTL_GET: 194 error = quota_handle_cmd_get(mp, l, args); 195 break; 196 case QUOTACTL_PUT: 197 error = quota_handle_cmd_put(mp, l, args); 198 break; 199 case QUOTACTL_CURSORGET: 200 error = quota_handle_cmd_cursorget(mp, l, args); 201 break; 202 case QUOTACTL_DEL: 203 error = quota_handle_cmd_del(mp, l, args); 204 break; 205 case QUOTACTL_CURSOROPEN: 206 error = quota_handle_cmd_cursoropen(mp, l, args); 207 break; 208 case QUOTACTL_CURSORCLOSE: 209 error = quota_handle_cmd_cursorclose(mp, l, args); 210 break; 211 case QUOTACTL_CURSORSKIPIDTYPE: 212 error = quota_handle_cmd_cursorskipidtype(mp, l, args); 213 break; 214 case QUOTACTL_CURSORATEND: 215 error = quota_handle_cmd_cursoratend(mp, l, args); 216 break; 217 case QUOTACTL_CURSORREWIND: 218 error = quota_handle_cmd_cursorrewind(mp, l, args); 219 break; 220 default: 221 panic("Invalid quotactl operation %d\n", args->qc_op); 222 } 223 224 return error; 225} 226 227static int 228quota_handle_cmd_stat(struct mount *mp, struct lwp *l, 229 struct quotactl_args *args) 230{ 231 struct ulfsmount *ump = VFSTOULFS(mp); 232 struct lfs *fs = ump->um_lfs; 233 234 KASSERT(args->qc_op == QUOTACTL_STAT); 235 236 if ((fs->um_flags & (ULFS_QUOTA|ULFS_QUOTA2)) == 0) 237 return EOPNOTSUPP; 238 239#ifdef LFS_QUOTA 240 if (fs->um_flags & ULFS_QUOTA) { 241 struct quotastat *info = args->u.stat.qc_info; 242 strcpy(info->qs_implname, "lfs quota v1"); 243 info->qs_numidtypes = ULFS_MAXQUOTAS; 244 /* XXX no define for this */ 245 info->qs_numobjtypes = 2; 246 info->qs_restrictions = 0; 247 info->qs_restrictions |= QUOTA_RESTRICT_NEEDSQUOTACHECK; 248 info->qs_restrictions |= QUOTA_RESTRICT_UNIFORMGRACE; 249 info->qs_restrictions |= QUOTA_RESTRICT_32BIT; 250 } else 251#endif 252#ifdef LFS_QUOTA2 253 if (fs->um_flags & ULFS_QUOTA2) { 254 struct quotastat *info = args->u.stat.qc_info; 255 strcpy(info->qs_implname, "lfs quota v2"); 256 info->qs_numidtypes = ULFS_MAXQUOTAS; 257 info->qs_numobjtypes = N_QL; 258 info->qs_restrictions = 0; 259 } else 260#endif 261 return EOPNOTSUPP; 262 263 return 0; 264} 265 266static int 267quota_handle_cmd_idtypestat(struct mount *mp, struct lwp *l, 268 struct quotactl_args *args) 269{ 270 struct ulfsmount *ump = VFSTOULFS(mp); 271 struct lfs *fs = ump->um_lfs; 272 int idtype; 273 struct quotaidtypestat *info; 274 const char *name; 275 276 KASSERT(args->qc_op == QUOTACTL_IDTYPESTAT); 277 idtype = args->u.idtypestat.qc_idtype; 278 info = args->u.idtypestat.qc_info; 279 280 if ((fs->um_flags & (ULFS_QUOTA|ULFS_QUOTA2)) == 0) 281 return EOPNOTSUPP; 282 283 /* 284 * These are the same for both QUOTA and QUOTA2. 285 */ 286 switch (idtype) { 287 case QUOTA_IDTYPE_USER: 288 name = "user"; 289 break; 290 case QUOTA_IDTYPE_GROUP: 291 name = "group"; 292 break; 293 default: 294 return EINVAL; 295 } 296 strlcpy(info->qis_name, name, sizeof(info->qis_name)); 297 return 0; 298} 299 300static int 301quota_handle_cmd_objtypestat(struct mount *mp, struct lwp *l, 302 struct quotactl_args *args) 303{ 304 struct ulfsmount *ump = VFSTOULFS(mp); 305 struct lfs *fs = ump->um_lfs; 306 int objtype; 307 struct quotaobjtypestat *info; 308 const char *name; 309 int isbytes; 310 311 KASSERT(args->qc_op == QUOTACTL_OBJTYPESTAT); 312 objtype = args->u.objtypestat.qc_objtype; 313 info = args->u.objtypestat.qc_info; 314 315 if ((fs->um_flags & (ULFS_QUOTA|ULFS_QUOTA2)) == 0) 316 return EOPNOTSUPP; 317 318 /* 319 * These are the same for both QUOTA and QUOTA2. 320 */ 321 switch (objtype) { 322 case QUOTA_OBJTYPE_BLOCKS: 323 name = "block"; 324 isbytes = 1; 325 break; 326 case QUOTA_OBJTYPE_FILES: 327 name = "file"; 328 isbytes = 0; 329 break; 330 default: 331 return EINVAL; 332 } 333 strlcpy(info->qos_name, name, sizeof(info->qos_name)); 334 info->qos_isbytes = isbytes; 335 return 0; 336} 337 338/* XXX shouldn't all this be in kauth ? */ 339static int 340quota_get_auth(struct mount *mp, struct lwp *l, uid_t id) { 341 /* The user can always query about his own quota. */ 342 if (id == kauth_cred_geteuid(l->l_cred)) 343 return 0; 344 return kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_FS_QUOTA, 345 KAUTH_REQ_SYSTEM_FS_QUOTA_GET, mp, KAUTH_ARG(id), NULL); 346} 347 348static int 349quota_handle_cmd_get(struct mount *mp, struct lwp *l, 350 struct quotactl_args *args) 351{ 352 struct ulfsmount *ump = VFSTOULFS(mp); 353 struct lfs *fs = ump->um_lfs; 354 int error; 355 const struct quotakey *qk; 356 357 KASSERT(args->qc_op == QUOTACTL_GET); 358 qk = args->u.get.qc_key; 359 360 if ((fs->um_flags & (ULFS_QUOTA|ULFS_QUOTA2)) == 0) 361 return EOPNOTSUPP; 362 363 error = quota_get_auth(mp, l, qk->qk_id); 364 if (error != 0) 365 return error; 366#ifdef LFS_QUOTA 367 if (fs->um_flags & ULFS_QUOTA) { 368 struct quotaval *qv = args->u.get.qc_val; 369 error = lfsquota1_handle_cmd_get(ump, qk, qv); 370 } else 371#endif 372#ifdef LFS_QUOTA2 373 if (fs->um_flags & ULFS_QUOTA2) { 374 struct quotaval *qv = args->u.get.qc_val; 375 error = lfsquota2_handle_cmd_get(ump, qk, qv); 376 } else 377#endif 378 panic("quota_handle_cmd_get: no support ?"); 379 380 if (error != 0) 381 return error; 382 383 return error; 384} 385 386static int 387quota_handle_cmd_put(struct mount *mp, struct lwp *l, 388 struct quotactl_args *args) 389{ 390 struct ulfsmount *ump = VFSTOULFS(mp); 391 struct lfs *fs = ump->um_lfs; 392 const struct quotakey *qk; 393 id_t kauth_id; 394 int error; 395 396 KASSERT(args->qc_op == QUOTACTL_PUT); 397 qk = args->u.put.qc_key; 398 399 if ((fs->um_flags & (ULFS_QUOTA|ULFS_QUOTA2)) == 0) 400 return EOPNOTSUPP; 401 402 kauth_id = qk->qk_id; 403 if (kauth_id == QUOTA_DEFAULTID) { 404 kauth_id = 0; 405 } 406 407 error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_FS_QUOTA, 408 KAUTH_REQ_SYSTEM_FS_QUOTA_MANAGE, mp, KAUTH_ARG(kauth_id), 409 NULL); 410 if (error != 0) { 411 return error; 412 } 413 414#ifdef LFS_QUOTA 415 if (fs->um_flags & ULFS_QUOTA) { 416 const struct quotaval *qv = args->u.put.qc_val; 417 error = lfsquota1_handle_cmd_put(ump, qk, qv); 418 } else 419#endif 420#ifdef LFS_QUOTA2 421 if (fs->um_flags & ULFS_QUOTA2) { 422 const struct quotaval *qv = args->u.put.qc_val; 423 error = lfsquota2_handle_cmd_put(ump, qk, qv); 424 } else 425#endif 426 panic("quota_handle_cmd_get: no support ?"); 427 428 if (error == ENOENT) { 429 error = 0; 430 } 431 432 return error; 433} 434 435static int 436quota_handle_cmd_del(struct mount *mp, struct lwp *l, 437 struct quotactl_args *args) 438{ 439 struct ulfsmount *ump = VFSTOULFS(mp); 440 struct lfs *fs = ump->um_lfs; 441 const struct quotakey *qk; 442 id_t kauth_id; 443 int error; 444 445 KASSERT(args->qc_op == QUOTACTL_DEL); 446 qk = args->u.del.qc_key; 447 448 kauth_id = qk->qk_id; 449 if (kauth_id == QUOTA_DEFAULTID) { 450 kauth_id = 0; 451 } 452 453 if ((fs->um_flags & ULFS_QUOTA2) == 0) 454 return EOPNOTSUPP; 455 456 /* avoid whitespace changes */ 457 { 458 error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_FS_QUOTA, 459 KAUTH_REQ_SYSTEM_FS_QUOTA_MANAGE, mp, KAUTH_ARG(kauth_id), 460 NULL); 461 if (error != 0) 462 goto err; 463#ifdef LFS_QUOTA2 464 if (fs->um_flags & ULFS_QUOTA2) { 465 error = lfsquota2_handle_cmd_del(ump, qk); 466 } else 467#endif 468 panic("quota_handle_cmd_get: no support ?"); 469 470 if (error && error != ENOENT) 471 goto err; 472 } 473 474 return 0; 475 err: 476 return error; 477} 478 479static int 480quota_handle_cmd_cursorget(struct mount *mp, struct lwp *l, 481 struct quotactl_args *args) 482{ 483 struct ulfsmount *ump = VFSTOULFS(mp); 484 struct lfs *fs = ump->um_lfs; 485 int error; 486 487 KASSERT(args->qc_op == QUOTACTL_CURSORGET); 488 489 if ((fs->um_flags & ULFS_QUOTA2) == 0) 490 return EOPNOTSUPP; 491 492 error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_FS_QUOTA, 493 KAUTH_REQ_SYSTEM_FS_QUOTA_GET, mp, NULL, NULL); 494 if (error) 495 return error; 496 497#ifdef LFS_QUOTA2 498 if (fs->um_flags & ULFS_QUOTA2) { 499 struct quotakcursor *cursor = args->u.cursorget.qc_cursor; 500 struct quotakey *keys = args->u.cursorget.qc_keys; 501 struct quotaval *vals = args->u.cursorget.qc_vals; 502 unsigned maxnum = args->u.cursorget.qc_maxnum; 503 unsigned *ret = args->u.cursorget.qc_ret; 504 505 error = lfsquota2_handle_cmd_cursorget(ump, cursor, keys, vals, 506 maxnum, ret); 507 } else 508#endif 509 panic("quota_handle_cmd_cursorget: no support ?"); 510 511 return error; 512} 513 514static int 515quota_handle_cmd_cursoropen(struct mount *mp, struct lwp *l, 516 struct quotactl_args *args) 517{ 518#ifdef LFS_QUOTA2 519 struct ulfsmount *ump = VFSTOULFS(mp); 520 struct lfs *fs = ump->um_lfs; 521 struct quotakcursor *cursor; 522#endif 523 int error; 524 525 KASSERT(args->qc_op == QUOTACTL_CURSOROPEN); 526 527 error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_FS_QUOTA, 528 KAUTH_REQ_SYSTEM_FS_QUOTA_GET, mp, NULL, NULL); 529 if (error) 530 return error; 531 532#ifdef LFS_QUOTA2 533 if (fs->um_flags & ULFS_QUOTA2) { 534 cursor = args->u.cursoropen.qc_cursor; 535 error = lfsquota2_handle_cmd_cursoropen(ump, cursor); 536 } else 537#endif 538 error = EOPNOTSUPP; 539 540 return error; 541} 542 543static int 544quota_handle_cmd_cursorclose(struct mount *mp, struct lwp *l, 545 struct quotactl_args *args) 546{ 547#ifdef LFS_QUOTA2 548 struct ulfsmount *ump = VFSTOULFS(mp); 549 struct lfs *fs = ump->um_lfs; 550#endif 551 int error; 552 553 KASSERT(args->qc_op == QUOTACTL_CURSORCLOSE); 554 555 error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_FS_QUOTA, 556 KAUTH_REQ_SYSTEM_FS_QUOTA_GET, mp, NULL, NULL); 557 if (error) 558 return error; 559 560#ifdef LFS_QUOTA2 561 if (fs->um_flags & ULFS_QUOTA2) { 562 struct quotakcursor *cursor = args->u.cursorclose.qc_cursor; 563 error = lfsquota2_handle_cmd_cursorclose(ump, cursor); 564 } else 565#endif 566 error = EOPNOTSUPP; 567 568 return error; 569} 570 571static int 572quota_handle_cmd_cursorskipidtype(struct mount *mp, struct lwp *l, 573 struct quotactl_args *args) 574{ 575#ifdef LFS_QUOTA2 576 struct ulfsmount *ump = VFSTOULFS(mp); 577 struct lfs *fs = ump->um_lfs; 578#endif 579 int error; 580 581 KASSERT(args->qc_op == QUOTACTL_CURSORSKIPIDTYPE); 582 583#ifdef LFS_QUOTA2 584 if (fs->um_flags & ULFS_QUOTA2) { 585 struct quotakcursor *cursor = args->u.cursorskipidtype.qc_cursor; 586 int idtype = args->u.cursorskipidtype.qc_idtype; 587 error = lfsquota2_handle_cmd_cursorskipidtype(ump, cursor, idtype); 588 } else 589#endif 590 error = EOPNOTSUPP; 591 592 return error; 593} 594 595static int 596quota_handle_cmd_cursoratend(struct mount *mp, struct lwp *l, 597 struct quotactl_args *args) 598{ 599#ifdef LFS_QUOTA2 600 struct ulfsmount *ump = VFSTOULFS(mp); 601 struct lfs *fs = ump->um_lfs; 602#endif 603 int error; 604 605 KASSERT(args->qc_op == QUOTACTL_CURSORATEND); 606 607#ifdef LFS_QUOTA2 608 if (fs->um_flags & ULFS_QUOTA2) { 609 struct quotakcursor *cursor = args->u.cursoratend.qc_cursor; 610 int *ret = args->u.cursoratend.qc_ret; 611 error = lfsquota2_handle_cmd_cursoratend(ump, cursor, ret); 612 } else 613#endif 614 error = EOPNOTSUPP; 615 616 return error; 617} 618 619static int 620quota_handle_cmd_cursorrewind(struct mount *mp, struct lwp *l, 621 struct quotactl_args *args) 622{ 623#ifdef LFS_QUOTA2 624 struct ulfsmount *ump = VFSTOULFS(mp); 625 struct lfs *fs = ump->um_lfs; 626#endif 627 int error; 628 629 KASSERT(args->qc_op == QUOTACTL_CURSORREWIND); 630 631#ifdef LFS_QUOTA2 632 if (fs->um_flags & ULFS_QUOTA2) { 633 struct quotakcursor *cursor = args->u.cursorrewind.qc_cursor; 634 error = lfsquota2_handle_cmd_cursorrewind(ump, cursor); 635 } else 636#endif 637 error = EOPNOTSUPP; 638 639 return error; 640} 641 642static int 643quota_handle_cmd_quotaon(struct mount *mp, struct lwp *l, 644 struct quotactl_args *args) 645{ 646 struct ulfsmount *ump = VFSTOULFS(mp); 647 struct lfs *fs = ump->um_lfs; 648 int error; 649 650 KASSERT(args->qc_op == QUOTACTL_QUOTAON); 651 652 if ((fs->um_flags & ULFS_QUOTA2) != 0) 653 return EBUSY; 654 655 error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_FS_QUOTA, 656 KAUTH_REQ_SYSTEM_FS_QUOTA_ONOFF, mp, NULL, NULL); 657 if (error != 0) { 658 return error; 659 } 660#ifdef LFS_QUOTA 661 int idtype = args->u.quotaon.qc_idtype; 662 const char *qfile = args->u.quotaon.qc_quotafile; 663 error = lfsquota1_handle_cmd_quotaon(l, ump, idtype, qfile); 664#else 665 error = EOPNOTSUPP; 666#endif 667 668 return error; 669} 670 671static int 672quota_handle_cmd_quotaoff(struct mount *mp, struct lwp *l, 673 struct quotactl_args *args) 674{ 675 struct ulfsmount *ump = VFSTOULFS(mp); 676 struct lfs *fs = ump->um_lfs; 677 int error; 678 679 KASSERT(args->qc_op == QUOTACTL_QUOTAOFF); 680 681 if ((fs->um_flags & ULFS_QUOTA2) != 0) 682 return EOPNOTSUPP; 683 684 error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_FS_QUOTA, 685 KAUTH_REQ_SYSTEM_FS_QUOTA_ONOFF, mp, NULL, NULL); 686 if (error != 0) { 687 return error; 688 } 689#ifdef LFS_QUOTA 690 int idtype = args->u.quotaoff.qc_idtype; 691 error = lfsquota1_handle_cmd_quotaoff(l, ump, idtype); 692#else 693 error = EOPNOTSUPP; 694#endif 695 696 return error; 697} 698 699/* 700 * Initialize the quota system. 701 */ 702void 703lfs_dqinit(void) 704{ 705 706 mutex_init(&lfs_dqlock, MUTEX_DEFAULT, IPL_NONE); 707 cv_init(&lfs_dqcv, "quota"); 708 dqhashtbl = hashinit(desiredvnodes, HASH_LIST, true, &dqhash); 709 dquot_cache = pool_cache_init(sizeof(struct dquot), 0, 0, 0, "lfsdq", 710 NULL, IPL_NONE, NULL, NULL, NULL); 711} 712 713void 714lfs_dqreinit(void) 715{ 716 struct dquot *dq; 717 struct dqhashhead *oldhash, *hash; 718 struct vnode *dqvp; 719 u_long oldmask, mask, hashval; 720 int i; 721 722 hash = hashinit(desiredvnodes, HASH_LIST, true, &mask); 723 mutex_enter(&lfs_dqlock); 724 oldhash = dqhashtbl; 725 oldmask = dqhash; 726 dqhashtbl = hash; 727 dqhash = mask; 728 for (i = 0; i <= oldmask; i++) { 729 while ((dq = LIST_FIRST(&oldhash[i])) != NULL) { 730 dqvp = dq->dq_ump->um_quotas[dq->dq_type]; 731 LIST_REMOVE(dq, dq_hash); 732 hashval = DQHASH(dqvp, dq->dq_id); 733 LIST_INSERT_HEAD(&dqhashtbl[hashval], dq, dq_hash); 734 } 735 } 736 mutex_exit(&lfs_dqlock); 737 hashdone(oldhash, HASH_LIST, oldmask); 738} 739 740/* 741 * Free resources held by quota system. 742 */ 743void 744lfs_dqdone(void) 745{ 746 747 pool_cache_destroy(dquot_cache); 748 hashdone(dqhashtbl, HASH_LIST, dqhash); 749 cv_destroy(&lfs_dqcv); 750 mutex_destroy(&lfs_dqlock); 751} 752 753/* 754 * Set up the quotas for an inode. 755 * 756 * This routine completely defines the semantics of quotas. 757 * If other criteria want to be used to establish quotas, the 758 * ULFS_MAXQUOTAS value in quotas.h should be increased, and the 759 * additional dquots set up here. 760 */ 761int 762lfs_getinoquota(struct inode *ip) 763{ 764 struct ulfsmount *ump = ip->i_ump; 765 //struct lfs *fs = ump->um_lfs; // notyet 766 struct vnode *vp = ITOV(ip); 767 int i, error; 768 u_int32_t ino_ids[ULFS_MAXQUOTAS]; 769 770 /* 771 * To avoid deadlocks never update quotas for quota files 772 * on the same file system 773 */ 774 for (i = 0; i < ULFS_MAXQUOTAS; i++) 775 if (vp == ump->um_quotas[i]) 776 return 0; 777 778 ino_ids[ULFS_USRQUOTA] = ip->i_uid; 779 ino_ids[ULFS_GRPQUOTA] = ip->i_gid; 780 for (i = 0; i < ULFS_MAXQUOTAS; i++) { 781 /* 782 * If the file id changed the quota needs update. 783 */ 784 if (ip->i_dquot[i] != NODQUOT && 785 ip->i_dquot[i]->dq_id != ino_ids[i]) { 786 lfs_dqrele(ITOV(ip), ip->i_dquot[i]); 787 ip->i_dquot[i] = NODQUOT; 788 } 789 /* 790 * Set up the quota based on file id. 791 * ENODEV means that quotas are not enabled. 792 */ 793 if (ip->i_dquot[i] == NODQUOT && 794 (error = lfs_dqget(vp, ino_ids[i], ump, i, &ip->i_dquot[i])) && 795 error != ENODEV) 796 return (error); 797 } 798 return 0; 799} 800 801/* 802 * Obtain a dquot structure for the specified identifier and quota file 803 * reading the information from the file if necessary. 804 */ 805int 806lfs_dqget(struct vnode *vp, u_long id, struct ulfsmount *ump, int type, 807 struct dquot **dqp) 808{ 809 struct lfs *fs = ump->um_lfs; 810 struct dquot *dq, *ndq; 811 struct dqhashhead *dqh; 812 struct vnode *dqvp; 813 int error = 0; /* XXX gcc */ 814 815 /* Lock to see an up to date value for QTF_CLOSING. */ 816 mutex_enter(&lfs_dqlock); 817 if ((fs->um_flags & (ULFS_QUOTA|ULFS_QUOTA2)) == 0) { 818 mutex_exit(&lfs_dqlock); 819 *dqp = NODQUOT; 820 return (ENODEV); 821 } 822 dqvp = ump->um_quotas[type]; 823#ifdef LFS_QUOTA 824 if (fs->um_flags & ULFS_QUOTA) { 825 if (dqvp == NULLVP || (ump->umq1_qflags[type] & QTF_CLOSING)) { 826 mutex_exit(&lfs_dqlock); 827 *dqp = NODQUOT; 828 return (ENODEV); 829 } 830 } 831#endif 832#ifdef LFS_QUOTA2 833 if (fs->um_flags & ULFS_QUOTA2) { 834 if (dqvp == NULLVP) { 835 mutex_exit(&lfs_dqlock); 836 *dqp = NODQUOT; 837 return (ENODEV); 838 } 839 } 840#endif 841 KASSERT(dqvp != vp); 842 /* 843 * Check the cache first. 844 */ 845 dqh = &dqhashtbl[DQHASH(dqvp, id)]; 846 LIST_FOREACH(dq, dqh, dq_hash) { 847 if (dq->dq_id != id || 848 dq->dq_ump->um_quotas[dq->dq_type] != dqvp) 849 continue; 850 KASSERT(dq->dq_cnt > 0); 851 lfs_dqref(dq); 852 mutex_exit(&lfs_dqlock); 853 *dqp = dq; 854 return (0); 855 } 856 /* 857 * Not in cache, allocate a new one. 858 */ 859 mutex_exit(&lfs_dqlock); 860 ndq = pool_cache_get(dquot_cache, PR_WAITOK); 861 /* 862 * Initialize the contents of the dquot structure. 863 */ 864 memset((char *)ndq, 0, sizeof *ndq); 865 ndq->dq_flags = 0; 866 ndq->dq_id = id; 867 ndq->dq_ump = ump; 868 ndq->dq_type = type; 869 mutex_init(&ndq->dq_interlock, MUTEX_DEFAULT, IPL_NONE); 870 mutex_enter(&lfs_dqlock); 871 dqh = &dqhashtbl[DQHASH(dqvp, id)]; 872 LIST_FOREACH(dq, dqh, dq_hash) { 873 if (dq->dq_id != id || 874 dq->dq_ump->um_quotas[dq->dq_type] != dqvp) 875 continue; 876 /* 877 * Another thread beat us allocating this dquot. 878 */ 879 KASSERT(dq->dq_cnt > 0); 880 lfs_dqref(dq); 881 mutex_exit(&lfs_dqlock); 882 mutex_destroy(&ndq->dq_interlock); 883 pool_cache_put(dquot_cache, ndq); 884 *dqp = dq; 885 return 0; 886 } 887 dq = ndq; 888 LIST_INSERT_HEAD(dqh, dq, dq_hash); 889 lfs_dqref(dq); 890 mutex_enter(&dq->dq_interlock); 891 mutex_exit(&lfs_dqlock); 892#ifdef LFS_QUOTA 893 if (fs->um_flags & ULFS_QUOTA) 894 error = lfs_dq1get(dqvp, id, ump, type, dq); 895#endif 896#ifdef LFS_QUOTA2 897 if (fs->um_flags & ULFS_QUOTA2) 898 error = lfs_dq2get(dqvp, id, ump, type, dq); 899#endif 900 /* 901 * I/O error in reading quota file, release 902 * quota structure and reflect problem to caller. 903 */ 904 if (error) { 905 mutex_enter(&lfs_dqlock); 906 LIST_REMOVE(dq, dq_hash); 907 mutex_exit(&lfs_dqlock); 908 mutex_exit(&dq->dq_interlock); 909 lfs_dqrele(vp, dq); 910 *dqp = NODQUOT; 911 return (error); 912 } 913 mutex_exit(&dq->dq_interlock); 914 *dqp = dq; 915 return (0); 916} 917 918/* 919 * Obtain a reference to a dquot. 920 */ 921void 922lfs_dqref(struct dquot *dq) 923{ 924 925 KASSERT(mutex_owned(&lfs_dqlock)); 926 dq->dq_cnt++; 927 KASSERT(dq->dq_cnt > 0); 928} 929 930/* 931 * Release a reference to a dquot. 932 */ 933void 934lfs_dqrele(struct vnode *vp, struct dquot *dq) 935{ 936 937 if (dq == NODQUOT) 938 return; 939 mutex_enter(&dq->dq_interlock); 940 for (;;) { 941 mutex_enter(&lfs_dqlock); 942 if (dq->dq_cnt > 1) { 943 dq->dq_cnt--; 944 mutex_exit(&lfs_dqlock); 945 mutex_exit(&dq->dq_interlock); 946 return; 947 } 948 if ((dq->dq_flags & DQ_MOD) == 0) 949 break; 950 mutex_exit(&lfs_dqlock); 951#ifdef LFS_QUOTA 952 if (dq->dq_ump->um_lfs->um_flags & ULFS_QUOTA) 953 (void) lfs_dq1sync(vp, dq); 954#endif 955#ifdef LFS_QUOTA2 956 if (dq->dq_ump->um_lfs->um_flags & ULFS_QUOTA2) 957 (void) lfs_dq2sync(vp, dq); 958#endif 959 } 960 KASSERT(dq->dq_cnt == 1 && (dq->dq_flags & DQ_MOD) == 0); 961 LIST_REMOVE(dq, dq_hash); 962 mutex_exit(&lfs_dqlock); 963 mutex_exit(&dq->dq_interlock); 964 mutex_destroy(&dq->dq_interlock); 965 pool_cache_put(dquot_cache, dq); 966} 967 968int 969lfs_qsync(struct mount *mp) 970{ 971 struct ulfsmount *ump = VFSTOULFS(mp); 972 struct lfs *fs = ump->um_lfs; 973 974 /* avoid compiler warning when quotas aren't enabled */ 975 (void)ump; 976 (void)fs; 977 978#ifdef LFS_QUOTA 979 if (fs->um_flags & ULFS_QUOTA) 980 return lfs_q1sync(mp); 981#endif 982#ifdef LFS_QUOTA2 983 if (fs->um_flags & ULFS_QUOTA2) 984 return lfs_q2sync(mp); 985#endif 986 return 0; 987} 988 989#ifdef DIAGNOSTIC 990/* 991 * Check the hash chains for stray dquot's. 992 */ 993void 994lfs_dqflush(struct vnode *vp) 995{ 996 struct dquot *dq; 997 int i; 998 999 mutex_enter(&lfs_dqlock); 1000 for (i = 0; i <= dqhash; i++) 1001 LIST_FOREACH(dq, &dqhashtbl[i], dq_hash) 1002 KASSERT(dq->dq_ump->um_quotas[dq->dq_type] != vp); 1003 mutex_exit(&lfs_dqlock); 1004} 1005#endif 1006