1 | /* $NetBSD: ufs_quota1.c,v 1.22 2016/06/20 00:52:04 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_quota1.c,v 1.22 2016/06/20 00:52:04 dholland Exp $" ); |
39 | |
40 | #include <sys/param.h> |
41 | #include <sys/kernel.h> |
42 | #include <sys/systm.h> |
43 | #include <sys/namei.h> |
44 | #include <sys/file.h> |
45 | #include <sys/proc.h> |
46 | #include <sys/vnode.h> |
47 | #include <sys/mount.h> |
48 | #include <sys/kauth.h> |
49 | |
50 | #include <ufs/ufs/quota1.h> |
51 | #include <ufs/ufs/inode.h> |
52 | #include <ufs/ufs/ufsmount.h> |
53 | #include <ufs/ufs/ufs_extern.h> |
54 | #include <ufs/ufs/ufs_quota.h> |
55 | |
56 | static int chkdqchg(struct inode *, int64_t, kauth_cred_t, int); |
57 | static int chkiqchg(struct inode *, int32_t, kauth_cred_t, int); |
58 | |
59 | /* |
60 | * Update disk usage, and take corrective action. |
61 | */ |
62 | int |
63 | chkdq1(struct inode *ip, int64_t change, kauth_cred_t cred, int flags) |
64 | { |
65 | struct dquot *dq; |
66 | int i; |
67 | int ncurblocks, error; |
68 | |
69 | if ((error = getinoquota(ip)) != 0) |
70 | return error; |
71 | if (change == 0) |
72 | return (0); |
73 | if (change < 0) { |
74 | for (i = 0; i < MAXQUOTAS; i++) { |
75 | if ((dq = ip->i_dquot[i]) == NODQUOT) |
76 | continue; |
77 | mutex_enter(&dq->dq_interlock); |
78 | ncurblocks = dq->dq_curblocks + change; |
79 | if (ncurblocks >= 0) |
80 | dq->dq_curblocks = ncurblocks; |
81 | else |
82 | dq->dq_curblocks = 0; |
83 | dq->dq_flags &= ~DQ_WARN(QL_BLOCK); |
84 | dq->dq_flags |= DQ_MOD; |
85 | mutex_exit(&dq->dq_interlock); |
86 | } |
87 | return (0); |
88 | } |
89 | for (i = 0; i < MAXQUOTAS; i++) { |
90 | if ((dq = ip->i_dquot[i]) == NODQUOT) |
91 | continue; |
92 | if ((flags & FORCE) == 0 && |
93 | kauth_authorize_system(cred, KAUTH_SYSTEM_FS_QUOTA, |
94 | KAUTH_REQ_SYSTEM_FS_QUOTA_NOLIMIT, KAUTH_ARG(i), |
95 | KAUTH_ARG(QL_BLOCK), NULL) != 0) { |
96 | mutex_enter(&dq->dq_interlock); |
97 | error = chkdqchg(ip, change, cred, i); |
98 | mutex_exit(&dq->dq_interlock); |
99 | if (error != 0) |
100 | return (error); |
101 | } |
102 | } |
103 | for (i = 0; i < MAXQUOTAS; i++) { |
104 | if ((dq = ip->i_dquot[i]) == NODQUOT) |
105 | continue; |
106 | mutex_enter(&dq->dq_interlock); |
107 | dq->dq_curblocks += change; |
108 | dq->dq_flags |= DQ_MOD; |
109 | mutex_exit(&dq->dq_interlock); |
110 | } |
111 | return (0); |
112 | } |
113 | |
114 | /* |
115 | * Check for a valid change to a users allocation. |
116 | * Issue an error message if appropriate. |
117 | */ |
118 | static int |
119 | chkdqchg(struct inode *ip, int64_t change, kauth_cred_t cred, int type) |
120 | { |
121 | struct dquot *dq = ip->i_dquot[type]; |
122 | long ncurblocks = dq->dq_curblocks + change; |
123 | |
124 | KASSERT(mutex_owned(&dq->dq_interlock)); |
125 | /* |
126 | * If user would exceed their hard limit, disallow space allocation. |
127 | */ |
128 | if (ncurblocks >= dq->dq_bhardlimit && dq->dq_bhardlimit) { |
129 | if ((dq->dq_flags & DQ_WARN(QL_BLOCK)) == 0 && |
130 | ip->i_uid == kauth_cred_geteuid(cred)) { |
131 | uprintf("\n%s: write failed, %s disk limit reached\n" , |
132 | ITOV(ip)->v_mount->mnt_stat.f_mntonname, |
133 | quotatypes[type]); |
134 | dq->dq_flags |= DQ_WARN(QL_BLOCK); |
135 | } |
136 | return (EDQUOT); |
137 | } |
138 | /* |
139 | * If user is over their soft limit for too long, disallow space |
140 | * allocation. Reset time limit as they cross their soft limit. |
141 | */ |
142 | if (ncurblocks >= dq->dq_bsoftlimit && dq->dq_bsoftlimit) { |
143 | if (dq->dq_curblocks < dq->dq_bsoftlimit) { |
144 | dq->dq_btime = |
145 | time_second + ip->i_ump->umq1_btime[type]; |
146 | if (ip->i_uid == kauth_cred_geteuid(cred)) |
147 | uprintf("\n%s: warning, %s %s\n" , |
148 | ITOV(ip)->v_mount->mnt_stat.f_mntonname, |
149 | quotatypes[type], "disk quota exceeded" ); |
150 | return (0); |
151 | } |
152 | if (time_second > dq->dq_btime) { |
153 | if ((dq->dq_flags & DQ_WARN(QL_BLOCK)) == 0 && |
154 | ip->i_uid == kauth_cred_geteuid(cred)) { |
155 | uprintf("\n%s: write failed, %s %s\n" , |
156 | ITOV(ip)->v_mount->mnt_stat.f_mntonname, |
157 | quotatypes[type], |
158 | "disk quota exceeded for too long" ); |
159 | dq->dq_flags |= DQ_WARN(QL_BLOCK); |
160 | } |
161 | return (EDQUOT); |
162 | } |
163 | } |
164 | return (0); |
165 | } |
166 | |
167 | /* |
168 | * Check the inode limit, applying corrective action. |
169 | */ |
170 | int |
171 | chkiq1(struct inode *ip, int32_t change, kauth_cred_t cred, int flags) |
172 | { |
173 | struct dquot *dq; |
174 | int i; |
175 | int ncurinodes, error; |
176 | |
177 | if ((error = getinoquota(ip)) != 0) |
178 | return error; |
179 | if (change == 0) |
180 | return (0); |
181 | if (change < 0) { |
182 | for (i = 0; i < MAXQUOTAS; i++) { |
183 | if ((dq = ip->i_dquot[i]) == NODQUOT) |
184 | continue; |
185 | mutex_enter(&dq->dq_interlock); |
186 | ncurinodes = dq->dq_curinodes + change; |
187 | if (ncurinodes >= 0) |
188 | dq->dq_curinodes = ncurinodes; |
189 | else |
190 | dq->dq_curinodes = 0; |
191 | dq->dq_flags &= ~DQ_WARN(QL_FILE); |
192 | dq->dq_flags |= DQ_MOD; |
193 | mutex_exit(&dq->dq_interlock); |
194 | } |
195 | return (0); |
196 | } |
197 | for (i = 0; i < MAXQUOTAS; i++) { |
198 | if ((dq = ip->i_dquot[i]) == NODQUOT) |
199 | continue; |
200 | if ((flags & FORCE) == 0 && kauth_authorize_system(cred, |
201 | KAUTH_SYSTEM_FS_QUOTA, KAUTH_REQ_SYSTEM_FS_QUOTA_NOLIMIT, |
202 | KAUTH_ARG(i), KAUTH_ARG(QL_FILE), NULL) != 0) { |
203 | mutex_enter(&dq->dq_interlock); |
204 | error = chkiqchg(ip, change, cred, i); |
205 | mutex_exit(&dq->dq_interlock); |
206 | if (error != 0) |
207 | return (error); |
208 | } |
209 | } |
210 | for (i = 0; i < MAXQUOTAS; i++) { |
211 | if ((dq = ip->i_dquot[i]) == NODQUOT) |
212 | continue; |
213 | mutex_enter(&dq->dq_interlock); |
214 | dq->dq_curinodes += change; |
215 | dq->dq_flags |= DQ_MOD; |
216 | mutex_exit(&dq->dq_interlock); |
217 | } |
218 | return (0); |
219 | } |
220 | |
221 | /* |
222 | * Check for a valid change to a users allocation. |
223 | * Issue an error message if appropriate. |
224 | */ |
225 | static int |
226 | chkiqchg(struct inode *ip, int32_t change, kauth_cred_t cred, int type) |
227 | { |
228 | struct dquot *dq = ip->i_dquot[type]; |
229 | long ncurinodes = dq->dq_curinodes + change; |
230 | |
231 | KASSERT(mutex_owned(&dq->dq_interlock)); |
232 | /* |
233 | * If user would exceed their hard limit, disallow inode allocation. |
234 | */ |
235 | if (ncurinodes >= dq->dq_ihardlimit && dq->dq_ihardlimit) { |
236 | if ((dq->dq_flags & DQ_WARN(QL_FILE)) == 0 && |
237 | ip->i_uid == kauth_cred_geteuid(cred)) { |
238 | uprintf("\n%s: write failed, %s inode limit reached\n" , |
239 | ITOV(ip)->v_mount->mnt_stat.f_mntonname, |
240 | quotatypes[type]); |
241 | dq->dq_flags |= DQ_WARN(QL_FILE); |
242 | } |
243 | return (EDQUOT); |
244 | } |
245 | /* |
246 | * If user is over their soft limit for too long, disallow inode |
247 | * allocation. Reset time limit as they cross their soft limit. |
248 | */ |
249 | if (ncurinodes >= dq->dq_isoftlimit && dq->dq_isoftlimit) { |
250 | if (dq->dq_curinodes < dq->dq_isoftlimit) { |
251 | dq->dq_itime = |
252 | time_second + ip->i_ump->umq1_itime[type]; |
253 | if (ip->i_uid == kauth_cred_geteuid(cred)) |
254 | uprintf("\n%s: warning, %s %s\n" , |
255 | ITOV(ip)->v_mount->mnt_stat.f_mntonname, |
256 | quotatypes[type], "inode quota exceeded" ); |
257 | return (0); |
258 | } |
259 | if (time_second > dq->dq_itime) { |
260 | if ((dq->dq_flags & DQ_WARN(QL_FILE)) == 0 && |
261 | ip->i_uid == kauth_cred_geteuid(cred)) { |
262 | uprintf("\n%s: write failed, %s %s\n" , |
263 | ITOV(ip)->v_mount->mnt_stat.f_mntonname, |
264 | quotatypes[type], |
265 | "inode quota exceeded for too long" ); |
266 | dq->dq_flags |= DQ_WARN(QL_FILE); |
267 | } |
268 | return (EDQUOT); |
269 | } |
270 | } |
271 | return (0); |
272 | } |
273 | |
274 | int |
275 | quota1_umount(struct mount *mp, int flags) |
276 | { |
277 | int i, error; |
278 | struct ufsmount *ump = VFSTOUFS(mp); |
279 | struct lwp *l = curlwp; |
280 | |
281 | if ((ump->um_flags & UFS_QUOTA) == 0) |
282 | return 0; |
283 | |
284 | if ((error = vflush(mp, NULLVP, SKIPSYSTEM | flags)) != 0) |
285 | return (error); |
286 | |
287 | for (i = 0; i < MAXQUOTAS; i++) { |
288 | if (ump->um_quotas[i] != NULLVP) { |
289 | quota1_handle_cmd_quotaoff(l, ump, i); |
290 | } |
291 | } |
292 | return 0; |
293 | } |
294 | |
295 | /* |
296 | * Code to process quotactl commands. |
297 | */ |
298 | |
299 | /* |
300 | * set up a quota file for a particular file system. |
301 | */ |
302 | int |
303 | quota1_handle_cmd_quotaon(struct lwp *l, struct ufsmount *ump, int type, |
304 | const char *fname) |
305 | { |
306 | struct mount *mp = ump->um_mountp; |
307 | struct vnode *vp, **vpp; |
308 | struct vnode_iterator *marker; |
309 | struct dquot *dq; |
310 | int error; |
311 | struct pathbuf *pb; |
312 | struct nameidata nd; |
313 | |
314 | if (ump->um_flags & UFS_QUOTA2) { |
315 | uprintf("%s: quotas v2 already enabled\n" , |
316 | mp->mnt_stat.f_mntonname); |
317 | return (EBUSY); |
318 | } |
319 | |
320 | if (mp->mnt_wapbl != NULL) { |
321 | printf("%s: quota v1 cannot be used with -o log\n" , |
322 | mp->mnt_stat.f_mntonname); |
323 | return (EOPNOTSUPP); |
324 | } |
325 | |
326 | vpp = &ump->um_quotas[type]; |
327 | |
328 | pb = pathbuf_create(fname); |
329 | if (pb == NULL) { |
330 | return ENOMEM; |
331 | } |
332 | NDINIT(&nd, LOOKUP, FOLLOW, pb); |
333 | if ((error = vn_open(&nd, FREAD|FWRITE, 0)) != 0) { |
334 | pathbuf_destroy(pb); |
335 | return error; |
336 | } |
337 | vp = nd.ni_vp; |
338 | pathbuf_destroy(pb); |
339 | |
340 | VOP_UNLOCK(vp); |
341 | if (vp->v_type != VREG) { |
342 | (void) vn_close(vp, FREAD|FWRITE, l->l_cred); |
343 | return (EACCES); |
344 | } |
345 | if (*vpp != vp) |
346 | quota1_handle_cmd_quotaoff(l, ump, type); |
347 | mutex_enter(&dqlock); |
348 | while ((ump->umq1_qflags[type] & (QTF_CLOSING | QTF_OPENING)) != 0) |
349 | cv_wait(&dqcv, &dqlock); |
350 | ump->umq1_qflags[type] |= QTF_OPENING; |
351 | mutex_exit(&dqlock); |
352 | mp->mnt_flag |= MNT_QUOTA; |
353 | vp->v_vflag |= VV_SYSTEM; /* XXXSMP */ |
354 | *vpp = vp; |
355 | /* |
356 | * Save the credential of the process that turned on quotas. |
357 | * Set up the time limits for this quota. |
358 | */ |
359 | kauth_cred_hold(l->l_cred); |
360 | ump->um_cred[type] = l->l_cred; |
361 | ump->umq1_btime[type] = MAX_DQ_TIME; |
362 | ump->umq1_itime[type] = MAX_IQ_TIME; |
363 | if (dqget(NULLVP, 0, ump, type, &dq) == 0) { |
364 | if (dq->dq_btime > 0) |
365 | ump->umq1_btime[type] = dq->dq_btime; |
366 | if (dq->dq_itime > 0) |
367 | ump->umq1_itime[type] = dq->dq_itime; |
368 | dqrele(NULLVP, dq); |
369 | } |
370 | /* |
371 | * Search vnodes associated with this mount point, |
372 | * adding references to quota file being opened. |
373 | * NB: only need to add dquot's for inodes being modified. |
374 | */ |
375 | vfs_vnode_iterator_init(mp, &marker); |
376 | while ((vp = vfs_vnode_iterator_next(marker, NULL, NULL))) { |
377 | error = vn_lock(vp, LK_EXCLUSIVE); |
378 | if (error) { |
379 | vrele(vp); |
380 | continue; |
381 | } |
382 | mutex_enter(vp->v_interlock); |
383 | if (VTOI(vp) == NULL || vp->v_type == VNON || |
384 | vp->v_writecount == 0) { |
385 | mutex_exit(vp->v_interlock); |
386 | vput(vp); |
387 | continue; |
388 | } |
389 | mutex_exit(vp->v_interlock); |
390 | if ((error = getinoquota(VTOI(vp))) != 0) { |
391 | vput(vp); |
392 | break; |
393 | } |
394 | vput(vp); |
395 | } |
396 | vfs_vnode_iterator_destroy(marker); |
397 | |
398 | mutex_enter(&dqlock); |
399 | ump->umq1_qflags[type] &= ~QTF_OPENING; |
400 | cv_broadcast(&dqcv); |
401 | if (error == 0) |
402 | ump->um_flags |= UFS_QUOTA; |
403 | mutex_exit(&dqlock); |
404 | if (error) |
405 | quota1_handle_cmd_quotaoff(l, ump, type); |
406 | return (error); |
407 | } |
408 | |
409 | /* |
410 | * turn off disk quotas for a filesystem. |
411 | */ |
412 | int |
413 | quota1_handle_cmd_quotaoff(struct lwp *l, struct ufsmount *ump, int type) |
414 | { |
415 | struct mount *mp = ump->um_mountp; |
416 | struct vnode *vp; |
417 | struct vnode *qvp; |
418 | struct vnode_iterator *marker; |
419 | struct dquot *dq; |
420 | struct inode *ip; |
421 | kauth_cred_t cred; |
422 | int i, error; |
423 | |
424 | mutex_enter(&dqlock); |
425 | while ((ump->umq1_qflags[type] & (QTF_CLOSING | QTF_OPENING)) != 0) |
426 | cv_wait(&dqcv, &dqlock); |
427 | if ((qvp = ump->um_quotas[type]) == NULLVP) { |
428 | mutex_exit(&dqlock); |
429 | return (0); |
430 | } |
431 | ump->umq1_qflags[type] |= QTF_CLOSING; |
432 | ump->um_flags &= ~UFS_QUOTA; |
433 | mutex_exit(&dqlock); |
434 | /* |
435 | * Search vnodes associated with this mount point, |
436 | * deleting any references to quota file being closed. |
437 | */ |
438 | vfs_vnode_iterator_init(mp, &marker); |
439 | while ((vp = vfs_vnode_iterator_next(marker, NULL, NULL))) { |
440 | error = vn_lock(vp, LK_EXCLUSIVE); |
441 | if (error) { |
442 | vrele(vp); |
443 | continue; |
444 | } |
445 | ip = VTOI(vp); |
446 | if (ip == NULL || vp->v_type == VNON) { |
447 | vput(vp); |
448 | continue; |
449 | } |
450 | dq = ip->i_dquot[type]; |
451 | ip->i_dquot[type] = NODQUOT; |
452 | dqrele(vp, dq); |
453 | vput(vp); |
454 | } |
455 | vfs_vnode_iterator_destroy(marker); |
456 | #ifdef DIAGNOSTIC |
457 | dqflush(qvp); |
458 | #endif |
459 | qvp->v_vflag &= ~VV_SYSTEM; |
460 | error = vn_close(qvp, FREAD|FWRITE, l->l_cred); |
461 | mutex_enter(&dqlock); |
462 | ump->um_quotas[type] = NULLVP; |
463 | cred = ump->um_cred[type]; |
464 | ump->um_cred[type] = NOCRED; |
465 | for (i = 0; i < MAXQUOTAS; i++) |
466 | if (ump->um_quotas[i] != NULLVP) |
467 | break; |
468 | ump->umq1_qflags[type] &= ~QTF_CLOSING; |
469 | cv_broadcast(&dqcv); |
470 | mutex_exit(&dqlock); |
471 | kauth_cred_free(cred); |
472 | if (i == MAXQUOTAS) |
473 | mp->mnt_flag &= ~MNT_QUOTA; |
474 | return (error); |
475 | } |
476 | |
477 | int |
478 | quota1_handle_cmd_get(struct ufsmount *ump, const struct quotakey *qk, |
479 | struct quotaval *qv) |
480 | { |
481 | struct dquot *dq; |
482 | int error; |
483 | struct quotaval blocks, files; |
484 | int idtype; |
485 | id_t id; |
486 | |
487 | idtype = qk->qk_idtype; |
488 | id = qk->qk_id; |
489 | |
490 | if (ump->um_quotas[idtype] == NULLVP) |
491 | return ENODEV; |
492 | |
493 | if (id == QUOTA_DEFAULTID) { /* we want the grace period of id 0 */ |
494 | if ((error = dqget(NULLVP, 0, ump, idtype, &dq)) != 0) |
495 | return error; |
496 | |
497 | } else { |
498 | if ((error = dqget(NULLVP, id, ump, idtype, &dq)) != 0) |
499 | return error; |
500 | } |
501 | dqblk_to_quotavals(&dq->dq_un.dq1_dqb, &blocks, &files); |
502 | dqrele(NULLVP, dq); |
503 | if (id == QUOTA_DEFAULTID) { |
504 | if (blocks.qv_expiretime > 0) |
505 | blocks.qv_grace = blocks.qv_expiretime; |
506 | else |
507 | blocks.qv_grace = MAX_DQ_TIME; |
508 | if (files.qv_expiretime > 0) |
509 | files.qv_grace = files.qv_expiretime; |
510 | else |
511 | files.qv_grace = MAX_DQ_TIME; |
512 | } |
513 | |
514 | switch (qk->qk_objtype) { |
515 | case QUOTA_OBJTYPE_BLOCKS: |
516 | *qv = blocks; |
517 | break; |
518 | case QUOTA_OBJTYPE_FILES: |
519 | *qv = files; |
520 | break; |
521 | default: |
522 | return EINVAL; |
523 | } |
524 | |
525 | return 0; |
526 | } |
527 | |
528 | static uint32_t |
529 | quota1_encode_limit(uint64_t lim) |
530 | { |
531 | if (lim == QUOTA_NOLIMIT || lim >= 0xffffffff) { |
532 | return 0; |
533 | } |
534 | return lim; |
535 | } |
536 | |
537 | int |
538 | quota1_handle_cmd_put(struct ufsmount *ump, const struct quotakey *key, |
539 | const struct quotaval *val) |
540 | { |
541 | struct dquot *dq; |
542 | struct dqblk dqb; |
543 | int error; |
544 | |
545 | switch (key->qk_idtype) { |
546 | case QUOTA_IDTYPE_USER: |
547 | case QUOTA_IDTYPE_GROUP: |
548 | break; |
549 | default: |
550 | return EINVAL; |
551 | } |
552 | |
553 | switch (key->qk_objtype) { |
554 | case QUOTA_OBJTYPE_BLOCKS: |
555 | case QUOTA_OBJTYPE_FILES: |
556 | break; |
557 | default: |
558 | return EINVAL; |
559 | } |
560 | |
561 | if (ump->um_quotas[key->qk_idtype] == NULLVP) |
562 | return ENODEV; |
563 | |
564 | if (key->qk_id == QUOTA_DEFAULTID) { |
565 | /* just update grace times */ |
566 | id_t id = 0; |
567 | |
568 | if ((error = dqget(NULLVP, id, ump, key->qk_idtype, &dq)) != 0) |
569 | return error; |
570 | mutex_enter(&dq->dq_interlock); |
571 | if (val->qv_grace != QUOTA_NOTIME) { |
572 | if (key->qk_objtype == QUOTA_OBJTYPE_BLOCKS) |
573 | ump->umq1_btime[key->qk_idtype] = dq->dq_btime = |
574 | val->qv_grace; |
575 | if (key->qk_objtype == QUOTA_OBJTYPE_FILES) |
576 | ump->umq1_itime[key->qk_idtype] = dq->dq_itime = |
577 | val->qv_grace; |
578 | } |
579 | dq->dq_flags |= DQ_MOD; |
580 | mutex_exit(&dq->dq_interlock); |
581 | dqrele(NULLVP, dq); |
582 | return 0; |
583 | } |
584 | |
585 | if ((error = dqget(NULLVP, key->qk_id, ump, key->qk_idtype, &dq)) != 0) |
586 | return (error); |
587 | mutex_enter(&dq->dq_interlock); |
588 | /* |
589 | * Copy all but the current values. |
590 | * Reset time limit if previously had no soft limit or were |
591 | * under it, but now have a soft limit and are over it. |
592 | */ |
593 | dqb.dqb_curblocks = dq->dq_curblocks; |
594 | dqb.dqb_curinodes = dq->dq_curinodes; |
595 | dqb.dqb_btime = dq->dq_btime; |
596 | dqb.dqb_itime = dq->dq_itime; |
597 | if (key->qk_objtype == QUOTA_OBJTYPE_BLOCKS) { |
598 | dqb.dqb_bsoftlimit = quota1_encode_limit(val->qv_softlimit); |
599 | dqb.dqb_bhardlimit = quota1_encode_limit(val->qv_hardlimit); |
600 | dqb.dqb_isoftlimit = dq->dq_isoftlimit; |
601 | dqb.dqb_ihardlimit = dq->dq_ihardlimit; |
602 | } else { |
603 | KASSERT(key->qk_objtype == QUOTA_OBJTYPE_FILES); |
604 | dqb.dqb_bsoftlimit = dq->dq_bsoftlimit; |
605 | dqb.dqb_bhardlimit = dq->dq_bhardlimit; |
606 | dqb.dqb_isoftlimit = quota1_encode_limit(val->qv_softlimit); |
607 | dqb.dqb_ihardlimit = quota1_encode_limit(val->qv_hardlimit); |
608 | } |
609 | if (dq->dq_id == 0 && val->qv_grace != QUOTA_NOTIME) { |
610 | /* also update grace time if available */ |
611 | if (key->qk_objtype == QUOTA_OBJTYPE_BLOCKS) { |
612 | ump->umq1_btime[key->qk_idtype] = dqb.dqb_btime = |
613 | val->qv_grace; |
614 | } |
615 | if (key->qk_objtype == QUOTA_OBJTYPE_FILES) { |
616 | ump->umq1_itime[key->qk_idtype] = dqb.dqb_itime = |
617 | val->qv_grace; |
618 | } |
619 | } |
620 | if (dqb.dqb_bsoftlimit && |
621 | dq->dq_curblocks >= dqb.dqb_bsoftlimit && |
622 | (dq->dq_bsoftlimit == 0 || dq->dq_curblocks < dq->dq_bsoftlimit)) |
623 | dqb.dqb_btime = time_second + ump->umq1_btime[key->qk_idtype]; |
624 | if (dqb.dqb_isoftlimit && |
625 | dq->dq_curinodes >= dqb.dqb_isoftlimit && |
626 | (dq->dq_isoftlimit == 0 || dq->dq_curinodes < dq->dq_isoftlimit)) |
627 | dqb.dqb_itime = time_second + ump->umq1_itime[key->qk_idtype]; |
628 | dq->dq_un.dq1_dqb = dqb; |
629 | if (dq->dq_curblocks < dq->dq_bsoftlimit) |
630 | dq->dq_flags &= ~DQ_WARN(QL_BLOCK); |
631 | if (dq->dq_curinodes < dq->dq_isoftlimit) |
632 | dq->dq_flags &= ~DQ_WARN(QL_FILE); |
633 | if (dq->dq_isoftlimit == 0 && dq->dq_bsoftlimit == 0 && |
634 | dq->dq_ihardlimit == 0 && dq->dq_bhardlimit == 0) |
635 | dq->dq_flags |= DQ_FAKE; |
636 | else |
637 | dq->dq_flags &= ~DQ_FAKE; |
638 | dq->dq_flags |= DQ_MOD; |
639 | mutex_exit(&dq->dq_interlock); |
640 | dqrele(NULLVP, dq); |
641 | return (0); |
642 | } |
643 | |
644 | |
645 | #if 0 |
646 | /* |
647 | * Q_SETQUOTA - assign an entire dqblk structure. |
648 | */ |
649 | int |
650 | setquota1(struct mount *mp, u_long id, int type, struct dqblk *dqb) |
651 | { |
652 | struct dquot *dq; |
653 | struct dquot *ndq; |
654 | struct ufsmount *ump = VFSTOUFS(mp); |
655 | |
656 | |
657 | if ((error = dqget(NULLVP, id, ump, type, &ndq)) != 0) |
658 | return (error); |
659 | dq = ndq; |
660 | mutex_enter(&dq->dq_interlock); |
661 | /* |
662 | * Copy all but the current values. |
663 | * Reset time limit if previously had no soft limit or were |
664 | * under it, but now have a soft limit and are over it. |
665 | */ |
666 | dqb->dqb_curblocks = dq->dq_curblocks; |
667 | dqb->dqb_curinodes = dq->dq_curinodes; |
668 | if (dq->dq_id != 0) { |
669 | dqb->dqb_btime = dq->dq_btime; |
670 | dqb->dqb_itime = dq->dq_itime; |
671 | } |
672 | if (dqb->dqb_bsoftlimit && |
673 | dq->dq_curblocks >= dqb->dqb_bsoftlimit && |
674 | (dq->dq_bsoftlimit == 0 || dq->dq_curblocks < dq->dq_bsoftlimit)) |
675 | dqb->dqb_btime = time_second + ump->umq1_btime[type]; |
676 | if (dqb->dqb_isoftlimit && |
677 | dq->dq_curinodes >= dqb->dqb_isoftlimit && |
678 | (dq->dq_isoftlimit == 0 || dq->dq_curinodes < dq->dq_isoftlimit)) |
679 | dqb->dqb_itime = time_second + ump->umq1_itime[type]; |
680 | dq->dq_un.dq1_dqb = *dqb; |
681 | if (dq->dq_curblocks < dq->dq_bsoftlimit) |
682 | dq->dq_flags &= ~DQ_WARN(QL_BLOCK); |
683 | if (dq->dq_curinodes < dq->dq_isoftlimit) |
684 | dq->dq_flags &= ~DQ_WARN(QL_FILE); |
685 | if (dq->dq_isoftlimit == 0 && dq->dq_bsoftlimit == 0 && |
686 | dq->dq_ihardlimit == 0 && dq->dq_bhardlimit == 0) |
687 | dq->dq_flags |= DQ_FAKE; |
688 | else |
689 | dq->dq_flags &= ~DQ_FAKE; |
690 | dq->dq_flags |= DQ_MOD; |
691 | mutex_exit(&dq->dq_interlock); |
692 | dqrele(NULLVP, dq); |
693 | return (0); |
694 | } |
695 | |
696 | /* |
697 | * Q_SETUSE - set current inode and block usage. |
698 | */ |
699 | int |
700 | setuse(struct mount *mp, u_long id, int type, void *addr) |
701 | { |
702 | struct dquot *dq; |
703 | struct ufsmount *ump = VFSTOUFS(mp); |
704 | struct dquot *ndq; |
705 | struct dqblk usage; |
706 | int error; |
707 | |
708 | error = copyin(addr, (void *)&usage, sizeof (struct dqblk)); |
709 | if (error) |
710 | return (error); |
711 | if ((error = dqget(NULLVP, id, ump, type, &ndq)) != 0) |
712 | return (error); |
713 | dq = ndq; |
714 | mutex_enter(&dq->dq_interlock); |
715 | /* |
716 | * Reset time limit if have a soft limit and were |
717 | * previously under it, but are now over it. |
718 | */ |
719 | if (dq->dq_bsoftlimit && dq->dq_curblocks < dq->dq_bsoftlimit && |
720 | usage.dqb_curblocks >= dq->dq_bsoftlimit) |
721 | dq->dq_btime = time_second + ump->umq1_btime[type]; |
722 | if (dq->dq_isoftlimit && dq->dq_curinodes < dq->dq_isoftlimit && |
723 | usage.dqb_curinodes >= dq->dq_isoftlimit) |
724 | dq->dq_itime = time_second + ump->umq1_itime[type]; |
725 | dq->dq_curblocks = usage.dqb_curblocks; |
726 | dq->dq_curinodes = usage.dqb_curinodes; |
727 | if (dq->dq_curblocks < dq->dq_bsoftlimit) |
728 | dq->dq_flags &= ~DQ_WARN(QL_BLOCK); |
729 | if (dq->dq_curinodes < dq->dq_isoftlimit) |
730 | dq->dq_flags &= ~DQ_WARN(QL_FILE); |
731 | dq->dq_flags |= DQ_MOD; |
732 | mutex_exit(&dq->dq_interlock); |
733 | dqrele(NULLVP, dq); |
734 | return (0); |
735 | } |
736 | #endif |
737 | |
738 | /* |
739 | * Q_SYNC - sync quota files to disk. |
740 | */ |
741 | int |
742 | q1sync(struct mount *mp) |
743 | { |
744 | struct ufsmount *ump = VFSTOUFS(mp); |
745 | struct vnode *vp; |
746 | struct vnode_iterator *marker; |
747 | struct dquot *dq; |
748 | int i, error; |
749 | |
750 | /* |
751 | * Check if the mount point has any quotas. |
752 | * If not, simply return. |
753 | */ |
754 | for (i = 0; i < MAXQUOTAS; i++) |
755 | if (ump->um_quotas[i] != NULLVP) |
756 | break; |
757 | if (i == MAXQUOTAS) |
758 | return (0); |
759 | |
760 | /* |
761 | * Search vnodes associated with this mount point, |
762 | * synchronizing any modified dquot structures. |
763 | */ |
764 | vfs_vnode_iterator_init(mp, &marker); |
765 | while ((vp = vfs_vnode_iterator_next(marker, NULL, NULL))) { |
766 | error = vn_lock(vp, LK_EXCLUSIVE); |
767 | if (error) { |
768 | vrele(vp); |
769 | continue; |
770 | } |
771 | if (VTOI(vp) == NULL || vp->v_type == VNON) { |
772 | vput(vp); |
773 | continue; |
774 | } |
775 | for (i = 0; i < MAXQUOTAS; i++) { |
776 | dq = VTOI(vp)->i_dquot[i]; |
777 | if (dq == NODQUOT) |
778 | continue; |
779 | mutex_enter(&dq->dq_interlock); |
780 | if (dq->dq_flags & DQ_MOD) |
781 | dq1sync(vp, dq); |
782 | mutex_exit(&dq->dq_interlock); |
783 | } |
784 | vput(vp); |
785 | } |
786 | vfs_vnode_iterator_destroy(marker); |
787 | return (0); |
788 | } |
789 | |
790 | /* |
791 | * Obtain a dquot structure for the specified identifier and quota file |
792 | * reading the information from the file if necessary. |
793 | */ |
794 | int |
795 | dq1get(struct vnode *dqvp, u_long id, struct ufsmount *ump, int type, |
796 | struct dquot *dq) |
797 | { |
798 | struct iovec aiov; |
799 | struct uio auio; |
800 | int error; |
801 | |
802 | KASSERT(mutex_owned(&dq->dq_interlock)); |
803 | vn_lock(dqvp, LK_EXCLUSIVE | LK_RETRY); |
804 | auio.uio_iov = &aiov; |
805 | auio.uio_iovcnt = 1; |
806 | aiov.iov_base = (void *)&dq->dq_un.dq1_dqb; |
807 | aiov.iov_len = sizeof (struct dqblk); |
808 | auio.uio_resid = sizeof (struct dqblk); |
809 | auio.uio_offset = (off_t)id * sizeof (struct dqblk); |
810 | auio.uio_rw = UIO_READ; |
811 | UIO_SETUP_SYSSPACE(&auio); |
812 | error = VOP_READ(dqvp, &auio, 0, ump->um_cred[type]); |
813 | if (auio.uio_resid == sizeof(struct dqblk) && error == 0) |
814 | memset((void *)&dq->dq_un.dq1_dqb, 0, sizeof(struct dqblk)); |
815 | VOP_UNLOCK(dqvp); |
816 | /* |
817 | * I/O error in reading quota file, release |
818 | * quota structure and reflect problem to caller. |
819 | */ |
820 | if (error) |
821 | return (error); |
822 | /* |
823 | * Check for no limit to enforce. |
824 | * Initialize time values if necessary. |
825 | */ |
826 | if (dq->dq_isoftlimit == 0 && dq->dq_bsoftlimit == 0 && |
827 | dq->dq_ihardlimit == 0 && dq->dq_bhardlimit == 0) |
828 | dq->dq_flags |= DQ_FAKE; |
829 | if (dq->dq_id != 0) { |
830 | if (dq->dq_btime == 0) |
831 | dq->dq_btime = time_second + ump->umq1_btime[type]; |
832 | if (dq->dq_itime == 0) |
833 | dq->dq_itime = time_second + ump->umq1_itime[type]; |
834 | } |
835 | return (0); |
836 | } |
837 | |
838 | /* |
839 | * Update the disk quota in the quota file. |
840 | */ |
841 | int |
842 | dq1sync(struct vnode *vp, struct dquot *dq) |
843 | { |
844 | struct vnode *dqvp; |
845 | struct iovec aiov; |
846 | struct uio auio; |
847 | int error; |
848 | |
849 | if (dq == NODQUOT) |
850 | panic("dq1sync: dquot" ); |
851 | KASSERT(mutex_owned(&dq->dq_interlock)); |
852 | if ((dq->dq_flags & DQ_MOD) == 0) |
853 | return (0); |
854 | if ((dqvp = dq->dq_ump->um_quotas[dq->dq_type]) == NULLVP) |
855 | panic("dq1sync: file" ); |
856 | KASSERT(dqvp != vp); |
857 | vn_lock(dqvp, LK_EXCLUSIVE | LK_RETRY); |
858 | auio.uio_iov = &aiov; |
859 | auio.uio_iovcnt = 1; |
860 | aiov.iov_base = (void *)&dq->dq_un.dq1_dqb; |
861 | aiov.iov_len = sizeof (struct dqblk); |
862 | auio.uio_resid = sizeof (struct dqblk); |
863 | auio.uio_offset = (off_t)dq->dq_id * sizeof (struct dqblk); |
864 | auio.uio_rw = UIO_WRITE; |
865 | UIO_SETUP_SYSSPACE(&auio); |
866 | error = VOP_WRITE(dqvp, &auio, 0, dq->dq_ump->um_cred[dq->dq_type]); |
867 | if (auio.uio_resid && error == 0) |
868 | error = EIO; |
869 | dq->dq_flags &= ~DQ_MOD; |
870 | VOP_UNLOCK(dqvp); |
871 | return (error); |
872 | } |
873 | |