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 | |