Commit | Line | Data |
---|---|---|
c9ba0248 | 1 | /* |
69bfa049 | 2 | * Copyright (c) 1982, 1986, 1990, 1993, 1995 |
ad0f93d2 | 3 | * The Regents of the University of California. All rights reserved. |
c9ba0248 KM |
4 | * |
5 | * This code is derived from software contributed to Berkeley by | |
6 | * Robert Elz at The University of Melbourne. | |
7 | * | |
ad787160 C |
8 | * Redistribution and use in source and binary forms, with or without |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * 1. Redistributions of source code must retain the above copyright | |
12 | * notice, this list of conditions and the following disclaimer. | |
13 | * 2. Redistributions in binary form must reproduce the above copyright | |
14 | * notice, this list of conditions and the following disclaimer in the | |
15 | * documentation and/or other materials provided with the distribution. | |
16 | * 3. All advertising materials mentioning features or use of this software | |
17 | * must display the following acknowledgement: | |
18 | * This product includes software developed by the University of | |
19 | * California, Berkeley and its contributors. | |
20 | * 4. Neither the name of the University nor the names of its contributors | |
21 | * may be used to endorse or promote products derived from this software | |
22 | * without specific prior written permission. | |
c9ba0248 | 23 | * |
ad787160 C |
24 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
25 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
29 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
30 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
31 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
32 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
33 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
34 | * SUCH DAMAGE. | |
35 | * | |
fd88f5c5 | 36 | * @(#)ufs_quota.c 8.5 (Berkeley) 5/20/95 |
c9ba0248 | 37 | */ |
4e69d106 KB |
38 | #include <sys/param.h> |
39 | #include <sys/kernel.h> | |
40 | #include <sys/systm.h> | |
41 | #include <sys/namei.h> | |
42 | #include <sys/malloc.h> | |
43 | #include <sys/file.h> | |
44 | #include <sys/proc.h> | |
45 | #include <sys/vnode.h> | |
46 | #include <sys/mount.h> | |
47 | ||
48 | #include <ufs/ufs/quota.h> | |
49 | #include <ufs/ufs/inode.h> | |
50 | #include <ufs/ufs/ufsmount.h> | |
51 | #include <ufs/ufs/ufs_extern.h> | |
c9ba0248 KM |
52 | |
53 | /* | |
54 | * Quota name to error message mapping. | |
55 | */ | |
56 | static char *quotatypes[] = INITQFNAMES; | |
57 | ||
58 | /* | |
59 | * Set up the quotas for an inode. | |
60 | * | |
61 | * This routine completely defines the semantics of quotas. | |
62 | * If other criterion want to be used to establish quotas, the | |
63 | * MAXQUOTAS value in quotas.h should be increased, and the | |
64 | * additional dquots set up here. | |
65 | */ | |
4e69d106 | 66 | int |
c9ba0248 KM |
67 | getinoquota(ip) |
68 | register struct inode *ip; | |
69 | { | |
70 | struct ufsmount *ump; | |
71 | struct vnode *vp = ITOV(ip); | |
72 | int error; | |
73 | ||
74 | ump = VFSTOUFS(vp->v_mount); | |
75 | /* | |
76 | * Set up the user quota based on file uid. | |
77 | * EINVAL means that quotas are not enabled. | |
78 | */ | |
79 | if (ip->i_dquot[USRQUOTA] == NODQUOT && | |
80 | (error = | |
81 | dqget(vp, ip->i_uid, ump, USRQUOTA, &ip->i_dquot[USRQUOTA])) && | |
82 | error != EINVAL) | |
83 | return (error); | |
84 | /* | |
85 | * Set up the group quota based on file gid. | |
86 | * EINVAL means that quotas are not enabled. | |
87 | */ | |
88 | if (ip->i_dquot[GRPQUOTA] == NODQUOT && | |
89 | (error = | |
90 | dqget(vp, ip->i_gid, ump, GRPQUOTA, &ip->i_dquot[GRPQUOTA])) && | |
91 | error != EINVAL) | |
92 | return (error); | |
93 | return (0); | |
94 | } | |
95 | ||
96 | /* | |
97 | * Update disk usage, and take corrective action. | |
98 | */ | |
4e69d106 | 99 | int |
c9ba0248 KM |
100 | chkdq(ip, change, cred, flags) |
101 | register struct inode *ip; | |
102 | long change; | |
103 | struct ucred *cred; | |
104 | int flags; | |
105 | { | |
106 | register struct dquot *dq; | |
107 | register int i; | |
108 | int ncurblocks, error; | |
109 | ||
110 | #ifdef DIAGNOSTIC | |
111 | if ((flags & CHOWN) == 0) | |
112 | chkdquot(ip); | |
113 | #endif | |
114 | if (change == 0) | |
115 | return (0); | |
116 | if (change < 0) { | |
117 | for (i = 0; i < MAXQUOTAS; i++) { | |
118 | if ((dq = ip->i_dquot[i]) == NODQUOT) | |
119 | continue; | |
120 | while (dq->dq_flags & DQ_LOCK) { | |
121 | dq->dq_flags |= DQ_WANT; | |
122 | sleep((caddr_t)dq, PINOD+1); | |
123 | } | |
124 | ncurblocks = dq->dq_curblocks + change; | |
125 | if (ncurblocks >= 0) | |
126 | dq->dq_curblocks = ncurblocks; | |
127 | else | |
128 | dq->dq_curblocks = 0; | |
129 | dq->dq_flags &= ~DQ_BLKS; | |
130 | dq->dq_flags |= DQ_MOD; | |
131 | } | |
132 | return (0); | |
133 | } | |
134 | if ((flags & FORCE) == 0 && cred->cr_uid != 0) { | |
135 | for (i = 0; i < MAXQUOTAS; i++) { | |
136 | if ((dq = ip->i_dquot[i]) == NODQUOT) | |
137 | continue; | |
138 | if (error = chkdqchg(ip, change, cred, i)) | |
139 | return (error); | |
140 | } | |
141 | } | |
142 | for (i = 0; i < MAXQUOTAS; i++) { | |
143 | if ((dq = ip->i_dquot[i]) == NODQUOT) | |
144 | continue; | |
145 | while (dq->dq_flags & DQ_LOCK) { | |
146 | dq->dq_flags |= DQ_WANT; | |
147 | sleep((caddr_t)dq, PINOD+1); | |
148 | } | |
149 | dq->dq_curblocks += change; | |
150 | dq->dq_flags |= DQ_MOD; | |
151 | } | |
152 | return (0); | |
153 | } | |
154 | ||
155 | /* | |
156 | * Check for a valid change to a users allocation. | |
157 | * Issue an error message if appropriate. | |
158 | */ | |
4e69d106 | 159 | int |
c9ba0248 KM |
160 | chkdqchg(ip, change, cred, type) |
161 | struct inode *ip; | |
162 | long change; | |
163 | struct ucred *cred; | |
164 | int type; | |
165 | { | |
166 | register struct dquot *dq = ip->i_dquot[type]; | |
167 | long ncurblocks = dq->dq_curblocks + change; | |
168 | ||
169 | /* | |
170 | * If user would exceed their hard limit, disallow space allocation. | |
171 | */ | |
172 | if (ncurblocks >= dq->dq_bhardlimit && dq->dq_bhardlimit) { | |
173 | if ((dq->dq_flags & DQ_BLKS) == 0 && | |
174 | ip->i_uid == cred->cr_uid) { | |
175 | uprintf("\n%s: write failed, %s disk limit reached\n", | |
4e69d106 KB |
176 | ITOV(ip)->v_mount->mnt_stat.f_mntonname, |
177 | quotatypes[type]); | |
c9ba0248 KM |
178 | dq->dq_flags |= DQ_BLKS; |
179 | } | |
180 | return (EDQUOT); | |
181 | } | |
182 | /* | |
183 | * If user is over their soft limit for too long, disallow space | |
184 | * allocation. Reset time limit as they cross their soft limit. | |
185 | */ | |
186 | if (ncurblocks >= dq->dq_bsoftlimit && dq->dq_bsoftlimit) { | |
187 | if (dq->dq_curblocks < dq->dq_bsoftlimit) { | |
188 | dq->dq_btime = time.tv_sec + | |
189 | VFSTOUFS(ITOV(ip)->v_mount)->um_btime[type]; | |
190 | if (ip->i_uid == cred->cr_uid) | |
191 | uprintf("\n%s: warning, %s %s\n", | |
4e69d106 KB |
192 | ITOV(ip)->v_mount->mnt_stat.f_mntonname, |
193 | quotatypes[type], "disk quota exceeded"); | |
c9ba0248 KM |
194 | return (0); |
195 | } | |
196 | if (time.tv_sec > dq->dq_btime) { | |
197 | if ((dq->dq_flags & DQ_BLKS) == 0 && | |
198 | ip->i_uid == cred->cr_uid) { | |
199 | uprintf("\n%s: write failed, %s %s\n", | |
4e69d106 KB |
200 | ITOV(ip)->v_mount->mnt_stat.f_mntonname, |
201 | quotatypes[type], | |
202 | "disk quota exceeded for too long"); | |
c9ba0248 KM |
203 | dq->dq_flags |= DQ_BLKS; |
204 | } | |
205 | return (EDQUOT); | |
206 | } | |
207 | } | |
208 | return (0); | |
209 | } | |
210 | ||
211 | /* | |
212 | * Check the inode limit, applying corrective action. | |
213 | */ | |
4e69d106 | 214 | int |
c9ba0248 KM |
215 | chkiq(ip, change, cred, flags) |
216 | register struct inode *ip; | |
217 | long change; | |
218 | struct ucred *cred; | |
219 | int flags; | |
220 | { | |
221 | register struct dquot *dq; | |
222 | register int i; | |
223 | int ncurinodes, error; | |
224 | ||
225 | #ifdef DIAGNOSTIC | |
226 | if ((flags & CHOWN) == 0) | |
227 | chkdquot(ip); | |
228 | #endif | |
229 | if (change == 0) | |
230 | return (0); | |
231 | if (change < 0) { | |
232 | for (i = 0; i < MAXQUOTAS; i++) { | |
233 | if ((dq = ip->i_dquot[i]) == NODQUOT) | |
234 | continue; | |
235 | while (dq->dq_flags & DQ_LOCK) { | |
236 | dq->dq_flags |= DQ_WANT; | |
237 | sleep((caddr_t)dq, PINOD+1); | |
238 | } | |
239 | ncurinodes = dq->dq_curinodes + change; | |
240 | if (ncurinodes >= 0) | |
241 | dq->dq_curinodes = ncurinodes; | |
242 | else | |
243 | dq->dq_curinodes = 0; | |
244 | dq->dq_flags &= ~DQ_INODS; | |
245 | dq->dq_flags |= DQ_MOD; | |
246 | } | |
247 | return (0); | |
248 | } | |
249 | if ((flags & FORCE) == 0 && cred->cr_uid != 0) { | |
250 | for (i = 0; i < MAXQUOTAS; i++) { | |
251 | if ((dq = ip->i_dquot[i]) == NODQUOT) | |
252 | continue; | |
253 | if (error = chkiqchg(ip, change, cred, i)) | |
254 | return (error); | |
255 | } | |
256 | } | |
257 | for (i = 0; i < MAXQUOTAS; i++) { | |
258 | if ((dq = ip->i_dquot[i]) == NODQUOT) | |
259 | continue; | |
260 | while (dq->dq_flags & DQ_LOCK) { | |
261 | dq->dq_flags |= DQ_WANT; | |
262 | sleep((caddr_t)dq, PINOD+1); | |
263 | } | |
264 | dq->dq_curinodes += change; | |
265 | dq->dq_flags |= DQ_MOD; | |
266 | } | |
267 | return (0); | |
268 | } | |
269 | ||
270 | /* | |
271 | * Check for a valid change to a users allocation. | |
272 | * Issue an error message if appropriate. | |
273 | */ | |
4e69d106 | 274 | int |
c9ba0248 KM |
275 | chkiqchg(ip, change, cred, type) |
276 | struct inode *ip; | |
277 | long change; | |
278 | struct ucred *cred; | |
279 | int type; | |
280 | { | |
281 | register struct dquot *dq = ip->i_dquot[type]; | |
282 | long ncurinodes = dq->dq_curinodes + change; | |
283 | ||
284 | /* | |
285 | * If user would exceed their hard limit, disallow inode allocation. | |
286 | */ | |
287 | if (ncurinodes >= dq->dq_ihardlimit && dq->dq_ihardlimit) { | |
288 | if ((dq->dq_flags & DQ_INODS) == 0 && | |
289 | ip->i_uid == cred->cr_uid) { | |
290 | uprintf("\n%s: write failed, %s inode limit reached\n", | |
4e69d106 KB |
291 | ITOV(ip)->v_mount->mnt_stat.f_mntonname, |
292 | quotatypes[type]); | |
c9ba0248 KM |
293 | dq->dq_flags |= DQ_INODS; |
294 | } | |
295 | return (EDQUOT); | |
296 | } | |
297 | /* | |
298 | * If user is over their soft limit for too long, disallow inode | |
299 | * allocation. Reset time limit as they cross their soft limit. | |
300 | */ | |
301 | if (ncurinodes >= dq->dq_isoftlimit && dq->dq_isoftlimit) { | |
302 | if (dq->dq_curinodes < dq->dq_isoftlimit) { | |
303 | dq->dq_itime = time.tv_sec + | |
304 | VFSTOUFS(ITOV(ip)->v_mount)->um_itime[type]; | |
305 | if (ip->i_uid == cred->cr_uid) | |
306 | uprintf("\n%s: warning, %s %s\n", | |
4e69d106 KB |
307 | ITOV(ip)->v_mount->mnt_stat.f_mntonname, |
308 | quotatypes[type], "inode quota exceeded"); | |
c9ba0248 KM |
309 | return (0); |
310 | } | |
311 | if (time.tv_sec > dq->dq_itime) { | |
312 | if ((dq->dq_flags & DQ_INODS) == 0 && | |
313 | ip->i_uid == cred->cr_uid) { | |
314 | uprintf("\n%s: write failed, %s %s\n", | |
4e69d106 KB |
315 | ITOV(ip)->v_mount->mnt_stat.f_mntonname, |
316 | quotatypes[type], | |
317 | "inode quota exceeded for too long"); | |
c9ba0248 KM |
318 | dq->dq_flags |= DQ_INODS; |
319 | } | |
320 | return (EDQUOT); | |
321 | } | |
322 | } | |
323 | return (0); | |
324 | } | |
325 | ||
326 | #ifdef DIAGNOSTIC | |
327 | /* | |
4e69d106 KB |
328 | * On filesystems with quotas enabled, it is an error for a file to change |
329 | * size and not to have a dquot structure associated with it. | |
c9ba0248 | 330 | */ |
4e69d106 | 331 | void |
c9ba0248 KM |
332 | chkdquot(ip) |
333 | register struct inode *ip; | |
334 | { | |
335 | struct ufsmount *ump = VFSTOUFS(ITOV(ip)->v_mount); | |
336 | register int i; | |
337 | ||
338 | for (i = 0; i < MAXQUOTAS; i++) { | |
339 | if (ump->um_quotas[i] == NULLVP || | |
340 | (ump->um_qflags[i] & (QTF_OPENING|QTF_CLOSING))) | |
341 | continue; | |
342 | if (ip->i_dquot[i] == NODQUOT) { | |
343 | vprint("chkdquot: missing dquot", ITOV(ip)); | |
344 | panic("missing dquot"); | |
345 | } | |
346 | } | |
347 | } | |
4e69d106 | 348 | #endif |
c9ba0248 KM |
349 | |
350 | /* | |
351 | * Code to process quotactl commands. | |
352 | */ | |
353 | ||
354 | /* | |
355 | * Q_QUOTAON - set up a quota file for a particular file system. | |
356 | */ | |
4e69d106 | 357 | int |
c6f5111d MK |
358 | quotaon(p, mp, type, fname) |
359 | struct proc *p; | |
c9ba0248 KM |
360 | struct mount *mp; |
361 | register int type; | |
362 | caddr_t fname; | |
363 | { | |
69bfa049 KM |
364 | struct ufsmount *ump = VFSTOUFS(mp); |
365 | struct vnode *vp, **vpp; | |
c9ba0248 KM |
366 | struct vnode *nextvp; |
367 | struct dquot *dq; | |
368 | int error; | |
c6f5111d MK |
369 | struct nameidata nd; |
370 | ||
c9ba0248 | 371 | vpp = &ump->um_quotas[type]; |
1cc0d04b KM |
372 | NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, fname, p); |
373 | if (error = vn_open(&nd, FREAD|FWRITE, 0)) | |
c9ba0248 | 374 | return (error); |
c6f5111d | 375 | vp = nd.ni_vp; |
69bfa049 | 376 | VOP_UNLOCK(vp, 0, p); |
c9ba0248 | 377 | if (vp->v_type != VREG) { |
f7fccf38 | 378 | (void) vn_close(vp, FREAD|FWRITE, p->p_ucred, p); |
c9ba0248 KM |
379 | return (EACCES); |
380 | } | |
c9ba0248 | 381 | if (*vpp != vp) |
f7fccf38 | 382 | quotaoff(p, mp, type); |
c9ba0248 | 383 | ump->um_qflags[type] |= QTF_OPENING; |
82161bc8 | 384 | mp->mnt_flag |= MNT_QUOTA; |
c9ba0248 KM |
385 | vp->v_flag |= VSYSTEM; |
386 | *vpp = vp; | |
387 | /* | |
388 | * Save the credential of the process that turned on quotas. | |
389 | * Set up the time limits for this quota. | |
390 | */ | |
c6f5111d MK |
391 | crhold(p->p_ucred); |
392 | ump->um_cred[type] = p->p_ucred; | |
c9ba0248 KM |
393 | ump->um_btime[type] = MAX_DQ_TIME; |
394 | ump->um_itime[type] = MAX_IQ_TIME; | |
395 | if (dqget(NULLVP, 0, ump, type, &dq) == 0) { | |
396 | if (dq->dq_btime > 0) | |
397 | ump->um_btime[type] = dq->dq_btime; | |
398 | if (dq->dq_itime > 0) | |
399 | ump->um_itime[type] = dq->dq_itime; | |
400 | dqrele(NULLVP, dq); | |
401 | } | |
402 | /* | |
403 | * Search vnodes associated with this mount point, | |
404 | * adding references to quota file being opened. | |
f7fccf38 | 405 | * NB: only need to add dquot's for inodes being modified. |
c9ba0248 KM |
406 | */ |
407 | again: | |
afe890a0 KM |
408 | for (vp = mp->mnt_vnodelist.lh_first; vp != NULL; vp = nextvp) { |
409 | nextvp = vp->v_mntvnodes.le_next; | |
f7fccf38 | 410 | if (vp->v_writecount == 0) |
c9ba0248 | 411 | continue; |
69bfa049 | 412 | if (vget(vp, LK_EXCLUSIVE, p)) |
c9ba0248 | 413 | goto again; |
7460dc90 KM |
414 | if (error = getinoquota(VTOI(vp))) { |
415 | vput(vp); | |
c9ba0248 | 416 | break; |
7460dc90 | 417 | } |
c9ba0248 | 418 | vput(vp); |
afe890a0 | 419 | if (vp->v_mntvnodes.le_next != nextvp || vp->v_mount != mp) |
c9ba0248 KM |
420 | goto again; |
421 | } | |
422 | ump->um_qflags[type] &= ~QTF_OPENING; | |
423 | if (error) | |
f7fccf38 | 424 | quotaoff(p, mp, type); |
c9ba0248 KM |
425 | return (error); |
426 | } | |
427 | ||
428 | /* | |
429 | * Q_QUOTAOFF - turn off disk quotas for a filesystem. | |
430 | */ | |
4e69d106 | 431 | int |
f7fccf38 KM |
432 | quotaoff(p, mp, type) |
433 | struct proc *p; | |
c9ba0248 KM |
434 | struct mount *mp; |
435 | register int type; | |
436 | { | |
69bfa049 | 437 | struct vnode *vp; |
c9ba0248 KM |
438 | struct vnode *qvp, *nextvp; |
439 | struct ufsmount *ump = VFSTOUFS(mp); | |
69bfa049 KM |
440 | struct dquot *dq; |
441 | struct inode *ip; | |
f7fccf38 | 442 | int error; |
c9ba0248 | 443 | |
c9ba0248 KM |
444 | if ((qvp = ump->um_quotas[type]) == NULLVP) |
445 | return (0); | |
446 | ump->um_qflags[type] |= QTF_CLOSING; | |
447 | /* | |
448 | * Search vnodes associated with this mount point, | |
449 | * deleting any references to quota file being closed. | |
450 | */ | |
451 | again: | |
afe890a0 KM |
452 | for (vp = mp->mnt_vnodelist.lh_first; vp != NULL; vp = nextvp) { |
453 | nextvp = vp->v_mntvnodes.le_next; | |
69bfa049 | 454 | if (vget(vp, LK_EXCLUSIVE, p)) |
c9ba0248 KM |
455 | goto again; |
456 | ip = VTOI(vp); | |
457 | dq = ip->i_dquot[type]; | |
458 | ip->i_dquot[type] = NODQUOT; | |
459 | dqrele(vp, dq); | |
460 | vput(vp); | |
afe890a0 | 461 | if (vp->v_mntvnodes.le_next != nextvp || vp->v_mount != mp) |
c9ba0248 KM |
462 | goto again; |
463 | } | |
464 | dqflush(qvp); | |
465 | qvp->v_flag &= ~VSYSTEM; | |
f7fccf38 | 466 | error = vn_close(qvp, FREAD|FWRITE, p->p_ucred, p); |
c9ba0248 KM |
467 | ump->um_quotas[type] = NULLVP; |
468 | crfree(ump->um_cred[type]); | |
469 | ump->um_cred[type] = NOCRED; | |
470 | ump->um_qflags[type] &= ~QTF_CLOSING; | |
471 | for (type = 0; type < MAXQUOTAS; type++) | |
472 | if (ump->um_quotas[type] != NULLVP) | |
473 | break; | |
474 | if (type == MAXQUOTAS) | |
82161bc8 | 475 | mp->mnt_flag &= ~MNT_QUOTA; |
f7fccf38 | 476 | return (error); |
c9ba0248 KM |
477 | } |
478 | ||
479 | /* | |
480 | * Q_GETQUOTA - return current values in a dqblk structure. | |
481 | */ | |
4e69d106 | 482 | int |
c9ba0248 KM |
483 | getquota(mp, id, type, addr) |
484 | struct mount *mp; | |
485 | u_long id; | |
486 | int type; | |
487 | caddr_t addr; | |
488 | { | |
489 | struct dquot *dq; | |
490 | int error; | |
491 | ||
492 | if (error = dqget(NULLVP, id, VFSTOUFS(mp), type, &dq)) | |
493 | return (error); | |
494 | error = copyout((caddr_t)&dq->dq_dqb, addr, sizeof (struct dqblk)); | |
495 | dqrele(NULLVP, dq); | |
496 | return (error); | |
497 | } | |
498 | ||
499 | /* | |
500 | * Q_SETQUOTA - assign an entire dqblk structure. | |
501 | */ | |
4e69d106 | 502 | int |
c9ba0248 KM |
503 | setquota(mp, id, type, addr) |
504 | struct mount *mp; | |
505 | u_long id; | |
506 | int type; | |
507 | caddr_t addr; | |
508 | { | |
509 | register struct dquot *dq; | |
510 | struct dquot *ndq; | |
511 | struct ufsmount *ump = VFSTOUFS(mp); | |
512 | struct dqblk newlim; | |
513 | int error; | |
514 | ||
515 | if (error = copyin(addr, (caddr_t)&newlim, sizeof (struct dqblk))) | |
516 | return (error); | |
517 | if (error = dqget(NULLVP, id, ump, type, &ndq)) | |
518 | return (error); | |
519 | dq = ndq; | |
520 | while (dq->dq_flags & DQ_LOCK) { | |
521 | dq->dq_flags |= DQ_WANT; | |
522 | sleep((caddr_t)dq, PINOD+1); | |
523 | } | |
524 | /* | |
525 | * Copy all but the current values. | |
526 | * Reset time limit if previously had no soft limit or were | |
527 | * under it, but now have a soft limit and are over it. | |
528 | */ | |
529 | newlim.dqb_curblocks = dq->dq_curblocks; | |
530 | newlim.dqb_curinodes = dq->dq_curinodes; | |
531 | if (dq->dq_id != 0) { | |
532 | newlim.dqb_btime = dq->dq_btime; | |
533 | newlim.dqb_itime = dq->dq_itime; | |
534 | } | |
535 | if (newlim.dqb_bsoftlimit && | |
536 | dq->dq_curblocks >= newlim.dqb_bsoftlimit && | |
537 | (dq->dq_bsoftlimit == 0 || dq->dq_curblocks < dq->dq_bsoftlimit)) | |
538 | newlim.dqb_btime = time.tv_sec + ump->um_btime[type]; | |
539 | if (newlim.dqb_isoftlimit && | |
540 | dq->dq_curinodes >= newlim.dqb_isoftlimit && | |
541 | (dq->dq_isoftlimit == 0 || dq->dq_curinodes < dq->dq_isoftlimit)) | |
542 | newlim.dqb_itime = time.tv_sec + ump->um_itime[type]; | |
543 | dq->dq_dqb = newlim; | |
544 | if (dq->dq_curblocks < dq->dq_bsoftlimit) | |
545 | dq->dq_flags &= ~DQ_BLKS; | |
546 | if (dq->dq_curinodes < dq->dq_isoftlimit) | |
547 | dq->dq_flags &= ~DQ_INODS; | |
548 | if (dq->dq_isoftlimit == 0 && dq->dq_bsoftlimit == 0 && | |
549 | dq->dq_ihardlimit == 0 && dq->dq_bhardlimit == 0) | |
550 | dq->dq_flags |= DQ_FAKE; | |
551 | else | |
552 | dq->dq_flags &= ~DQ_FAKE; | |
553 | dq->dq_flags |= DQ_MOD; | |
554 | dqrele(NULLVP, dq); | |
555 | return (0); | |
556 | } | |
557 | ||
558 | /* | |
559 | * Q_SETUSE - set current inode and block usage. | |
560 | */ | |
4e69d106 | 561 | int |
c9ba0248 KM |
562 | setuse(mp, id, type, addr) |
563 | struct mount *mp; | |
564 | u_long id; | |
565 | int type; | |
566 | caddr_t addr; | |
567 | { | |
568 | register struct dquot *dq; | |
569 | struct ufsmount *ump = VFSTOUFS(mp); | |
570 | struct dquot *ndq; | |
571 | struct dqblk usage; | |
572 | int error; | |
573 | ||
574 | if (error = copyin(addr, (caddr_t)&usage, sizeof (struct dqblk))) | |
575 | return (error); | |
576 | if (error = dqget(NULLVP, id, ump, type, &ndq)) | |
577 | return (error); | |
578 | dq = ndq; | |
579 | while (dq->dq_flags & DQ_LOCK) { | |
580 | dq->dq_flags |= DQ_WANT; | |
581 | sleep((caddr_t)dq, PINOD+1); | |
582 | } | |
583 | /* | |
584 | * Reset time limit if have a soft limit and were | |
585 | * previously under it, but are now over it. | |
586 | */ | |
587 | if (dq->dq_bsoftlimit && dq->dq_curblocks < dq->dq_bsoftlimit && | |
588 | usage.dqb_curblocks >= dq->dq_bsoftlimit) | |
589 | dq->dq_btime = time.tv_sec + ump->um_btime[type]; | |
590 | if (dq->dq_isoftlimit && dq->dq_curinodes < dq->dq_isoftlimit && | |
591 | usage.dqb_curinodes >= dq->dq_isoftlimit) | |
592 | dq->dq_itime = time.tv_sec + ump->um_itime[type]; | |
593 | dq->dq_curblocks = usage.dqb_curblocks; | |
594 | dq->dq_curinodes = usage.dqb_curinodes; | |
595 | if (dq->dq_curblocks < dq->dq_bsoftlimit) | |
596 | dq->dq_flags &= ~DQ_BLKS; | |
597 | if (dq->dq_curinodes < dq->dq_isoftlimit) | |
598 | dq->dq_flags &= ~DQ_INODS; | |
599 | dq->dq_flags |= DQ_MOD; | |
600 | dqrele(NULLVP, dq); | |
601 | return (0); | |
602 | } | |
603 | ||
604 | /* | |
605 | * Q_SYNC - sync quota files to disk. | |
606 | */ | |
4e69d106 | 607 | int |
c9ba0248 KM |
608 | qsync(mp) |
609 | struct mount *mp; | |
610 | { | |
611 | struct ufsmount *ump = VFSTOUFS(mp); | |
69bfa049 KM |
612 | struct proc *p = curproc; /* XXX */ |
613 | struct vnode *vp, *nextvp; | |
614 | struct dquot *dq; | |
615 | int i, error; | |
c9ba0248 KM |
616 | |
617 | /* | |
eb1cc0cd KM |
618 | * Check if the mount point has any quotas. |
619 | * If not, simply return. | |
c9ba0248 | 620 | */ |
eb1cc0cd KM |
621 | for (i = 0; i < MAXQUOTAS; i++) |
622 | if (ump->um_quotas[i] != NULLVP) | |
623 | break; | |
624 | if (i == MAXQUOTAS) | |
625 | return (0); | |
626 | /* | |
627 | * Search vnodes associated with this mount point, | |
628 | * synchronizing any modified dquot structures. | |
629 | */ | |
69bfa049 | 630 | simple_lock(&mntvnode_slock); |
c9ba0248 | 631 | again: |
afe890a0 | 632 | for (vp = mp->mnt_vnodelist.lh_first; vp != NULL; vp = nextvp) { |
69bfa049 KM |
633 | if (vp->v_mount != mp) |
634 | goto again; | |
afe890a0 | 635 | nextvp = vp->v_mntvnodes.le_next; |
69bfa049 KM |
636 | simple_lock(&vp->v_interlock); |
637 | simple_unlock(&mntvnode_slock); | |
638 | error = vget(vp, LK_EXCLUSIVE | LK_NOWAIT | LK_INTERLOCK, p); | |
639 | if (error) { | |
640 | simple_lock(&mntvnode_slock); | |
641 | if (error == ENOENT) | |
642 | goto again; | |
eb1cc0cd | 643 | continue; |
69bfa049 | 644 | } |
c9ba0248 KM |
645 | for (i = 0; i < MAXQUOTAS; i++) { |
646 | dq = VTOI(vp)->i_dquot[i]; | |
647 | if (dq != NODQUOT && (dq->dq_flags & DQ_MOD)) | |
648 | dqsync(vp, dq); | |
649 | } | |
650 | vput(vp); | |
69bfa049 KM |
651 | simple_lock(&mntvnode_slock); |
652 | if (vp->v_mntvnodes.le_next != nextvp) | |
c9ba0248 KM |
653 | goto again; |
654 | } | |
69bfa049 | 655 | simple_unlock(&mntvnode_slock); |
c9ba0248 KM |
656 | return (0); |
657 | } | |
658 | ||
659 | /* | |
660 | * Code pertaining to management of the in-core dquot data structures. | |
661 | */ | |
2a3c3dee KM |
662 | #define DQHASH(dqvp, id) \ |
663 | (&dqhashtbl[((((int)(dqvp)) >> 8) + id) & dqhash]) | |
664 | LIST_HEAD(dqhash, dquot) *dqhashtbl; | |
76d72062 | 665 | u_long dqhash; |
c9ba0248 KM |
666 | |
667 | /* | |
668 | * Dquot free list. | |
669 | */ | |
670 | #define DQUOTINC 5 /* minimum free dquots desired */ | |
2a3c3dee | 671 | TAILQ_HEAD(dqfreelist, dquot) dqfreelist; |
c9ba0248 KM |
672 | long numdquot, desireddquot = DQUOTINC; |
673 | ||
674 | /* | |
675 | * Initialize the quota system. | |
676 | */ | |
4e69d106 | 677 | void |
c9ba0248 KM |
678 | dqinit() |
679 | { | |
76d72062 KM |
680 | |
681 | dqhashtbl = hashinit(desiredvnodes, M_DQUOT, &dqhash); | |
2a3c3dee | 682 | TAILQ_INIT(&dqfreelist); |
c9ba0248 KM |
683 | } |
684 | ||
685 | /* | |
686 | * Obtain a dquot structure for the specified identifier and quota file | |
687 | * reading the information from the file if necessary. | |
688 | */ | |
4e69d106 | 689 | int |
c9ba0248 KM |
690 | dqget(vp, id, ump, type, dqp) |
691 | struct vnode *vp; | |
692 | u_long id; | |
693 | register struct ufsmount *ump; | |
694 | register int type; | |
695 | struct dquot **dqp; | |
696 | { | |
69bfa049 KM |
697 | struct proc *p = curproc; /* XXX */ |
698 | struct dquot *dq; | |
2a3c3dee | 699 | struct dqhash *dqh; |
69bfa049 | 700 | struct vnode *dqvp; |
c9ba0248 KM |
701 | struct iovec aiov; |
702 | struct uio auio; | |
703 | int error; | |
704 | ||
705 | dqvp = ump->um_quotas[type]; | |
706 | if (dqvp == NULLVP || (ump->um_qflags[type] & QTF_CLOSING)) { | |
707 | *dqp = NODQUOT; | |
708 | return (EINVAL); | |
709 | } | |
710 | /* | |
711 | * Check the cache first. | |
712 | */ | |
2a3c3dee KM |
713 | dqh = DQHASH(dqvp, id); |
714 | for (dq = dqh->lh_first; dq; dq = dq->dq_hash.le_next) { | |
c9ba0248 KM |
715 | if (dq->dq_id != id || |
716 | dq->dq_ump->um_quotas[dq->dq_type] != dqvp) | |
717 | continue; | |
718 | /* | |
719 | * Cache hit with no references. Take | |
720 | * the structure off the free list. | |
721 | */ | |
2a3c3dee KM |
722 | if (dq->dq_cnt == 0) |
723 | TAILQ_REMOVE(&dqfreelist, dq, dq_freelist); | |
c9ba0248 KM |
724 | DQREF(dq); |
725 | *dqp = dq; | |
726 | return (0); | |
727 | } | |
728 | /* | |
729 | * Not in cache, allocate a new one. | |
730 | */ | |
2a3c3dee KM |
731 | if (dqfreelist.tqh_first == NODQUOT && |
732 | numdquot < MAXQUOTAS * desiredvnodes) | |
c9ba0248 KM |
733 | desireddquot += DQUOTINC; |
734 | if (numdquot < desireddquot) { | |
735 | dq = (struct dquot *)malloc(sizeof *dq, M_DQUOT, M_WAITOK); | |
736 | bzero((char *)dq, sizeof *dq); | |
737 | numdquot++; | |
738 | } else { | |
2a3c3dee | 739 | if ((dq = dqfreelist.tqh_first) == NULL) { |
c9ba0248 KM |
740 | tablefull("dquot"); |
741 | *dqp = NODQUOT; | |
742 | return (EUSERS); | |
743 | } | |
744 | if (dq->dq_cnt || (dq->dq_flags & DQ_MOD)) | |
745 | panic("free dquot isn't"); | |
2a3c3dee KM |
746 | TAILQ_REMOVE(&dqfreelist, dq, dq_freelist); |
747 | LIST_REMOVE(dq, dq_hash); | |
c9ba0248 KM |
748 | } |
749 | /* | |
750 | * Initialize the contents of the dquot structure. | |
751 | */ | |
752 | if (vp != dqvp) | |
69bfa049 | 753 | vn_lock(dqvp, LK_EXCLUSIVE | LK_RETRY, p); |
2a3c3dee | 754 | LIST_INSERT_HEAD(dqh, dq, dq_hash); |
c9ba0248 KM |
755 | DQREF(dq); |
756 | dq->dq_flags = DQ_LOCK; | |
757 | dq->dq_id = id; | |
758 | dq->dq_ump = ump; | |
759 | dq->dq_type = type; | |
760 | auio.uio_iov = &aiov; | |
761 | auio.uio_iovcnt = 1; | |
762 | aiov.iov_base = (caddr_t)&dq->dq_dqb; | |
763 | aiov.iov_len = sizeof (struct dqblk); | |
764 | auio.uio_resid = sizeof (struct dqblk); | |
765 | auio.uio_offset = (off_t)(id * sizeof (struct dqblk)); | |
766 | auio.uio_segflg = UIO_SYSSPACE; | |
767 | auio.uio_rw = UIO_READ; | |
7bad0643 | 768 | auio.uio_procp = (struct proc *)0; |
c9ba0248 | 769 | error = VOP_READ(dqvp, &auio, 0, ump->um_cred[type]); |
2842f018 KM |
770 | if (auio.uio_resid == sizeof(struct dqblk) && error == 0) |
771 | bzero((caddr_t)&dq->dq_dqb, sizeof(struct dqblk)); | |
c9ba0248 | 772 | if (vp != dqvp) |
69bfa049 | 773 | VOP_UNLOCK(dqvp, 0, p); |
c9ba0248 KM |
774 | if (dq->dq_flags & DQ_WANT) |
775 | wakeup((caddr_t)dq); | |
776 | dq->dq_flags = 0; | |
777 | /* | |
778 | * I/O error in reading quota file, release | |
779 | * quota structure and reflect problem to caller. | |
780 | */ | |
781 | if (error) { | |
2a3c3dee | 782 | LIST_REMOVE(dq, dq_hash); |
c9ba0248 KM |
783 | dqrele(vp, dq); |
784 | *dqp = NODQUOT; | |
785 | return (error); | |
786 | } | |
787 | /* | |
788 | * Check for no limit to enforce. | |
789 | * Initialize time values if necessary. | |
790 | */ | |
791 | if (dq->dq_isoftlimit == 0 && dq->dq_bsoftlimit == 0 && | |
792 | dq->dq_ihardlimit == 0 && dq->dq_bhardlimit == 0) | |
793 | dq->dq_flags |= DQ_FAKE; | |
794 | if (dq->dq_id != 0) { | |
795 | if (dq->dq_btime == 0) | |
796 | dq->dq_btime = time.tv_sec + ump->um_btime[type]; | |
797 | if (dq->dq_itime == 0) | |
798 | dq->dq_itime = time.tv_sec + ump->um_itime[type]; | |
799 | } | |
800 | *dqp = dq; | |
801 | return (0); | |
802 | } | |
803 | ||
804 | /* | |
805 | * Obtain a reference to a dquot. | |
806 | */ | |
4e69d106 | 807 | void |
c9ba0248 KM |
808 | dqref(dq) |
809 | struct dquot *dq; | |
810 | { | |
811 | ||
812 | dq->dq_cnt++; | |
813 | } | |
814 | ||
815 | /* | |
816 | * Release a reference to a dquot. | |
817 | */ | |
4e69d106 | 818 | void |
c9ba0248 KM |
819 | dqrele(vp, dq) |
820 | struct vnode *vp; | |
821 | register struct dquot *dq; | |
822 | { | |
823 | ||
824 | if (dq == NODQUOT) | |
825 | return; | |
826 | if (dq->dq_cnt > 1) { | |
827 | dq->dq_cnt--; | |
828 | return; | |
829 | } | |
830 | if (dq->dq_flags & DQ_MOD) | |
831 | (void) dqsync(vp, dq); | |
832 | if (--dq->dq_cnt > 0) | |
833 | return; | |
2a3c3dee | 834 | TAILQ_INSERT_TAIL(&dqfreelist, dq, dq_freelist); |
c9ba0248 KM |
835 | } |
836 | ||
837 | /* | |
838 | * Update the disk quota in the quota file. | |
839 | */ | |
4e69d106 | 840 | int |
c9ba0248 KM |
841 | dqsync(vp, dq) |
842 | struct vnode *vp; | |
69bfa049 | 843 | struct dquot *dq; |
c9ba0248 | 844 | { |
69bfa049 | 845 | struct proc *p = curproc; /* XXX */ |
c9ba0248 KM |
846 | struct vnode *dqvp; |
847 | struct iovec aiov; | |
848 | struct uio auio; | |
849 | int error; | |
850 | ||
851 | if (dq == NODQUOT) | |
852 | panic("dqsync: dquot"); | |
853 | if ((dq->dq_flags & DQ_MOD) == 0) | |
854 | return (0); | |
855 | if ((dqvp = dq->dq_ump->um_quotas[dq->dq_type]) == NULLVP) | |
856 | panic("dqsync: file"); | |
857 | if (vp != dqvp) | |
69bfa049 | 858 | vn_lock(dqvp, LK_EXCLUSIVE | LK_RETRY, p); |
c9ba0248 KM |
859 | while (dq->dq_flags & DQ_LOCK) { |
860 | dq->dq_flags |= DQ_WANT; | |
861 | sleep((caddr_t)dq, PINOD+2); | |
c0486eb9 KM |
862 | if ((dq->dq_flags & DQ_MOD) == 0) { |
863 | if (vp != dqvp) | |
69bfa049 | 864 | VOP_UNLOCK(dqvp, 0, p); |
c9ba0248 | 865 | return (0); |
c0486eb9 | 866 | } |
c9ba0248 KM |
867 | } |
868 | dq->dq_flags |= DQ_LOCK; | |
869 | auio.uio_iov = &aiov; | |
870 | auio.uio_iovcnt = 1; | |
871 | aiov.iov_base = (caddr_t)&dq->dq_dqb; | |
872 | aiov.iov_len = sizeof (struct dqblk); | |
873 | auio.uio_resid = sizeof (struct dqblk); | |
874 | auio.uio_offset = (off_t)(dq->dq_id * sizeof (struct dqblk)); | |
875 | auio.uio_segflg = UIO_SYSSPACE; | |
876 | auio.uio_rw = UIO_WRITE; | |
7bad0643 | 877 | auio.uio_procp = (struct proc *)0; |
c9ba0248 KM |
878 | error = VOP_WRITE(dqvp, &auio, 0, dq->dq_ump->um_cred[dq->dq_type]); |
879 | if (auio.uio_resid && error == 0) | |
880 | error = EIO; | |
881 | if (dq->dq_flags & DQ_WANT) | |
882 | wakeup((caddr_t)dq); | |
883 | dq->dq_flags &= ~(DQ_MOD|DQ_LOCK|DQ_WANT); | |
884 | if (vp != dqvp) | |
69bfa049 | 885 | VOP_UNLOCK(dqvp, 0, p); |
c9ba0248 KM |
886 | return (error); |
887 | } | |
888 | ||
889 | /* | |
890 | * Flush all entries from the cache for a particular vnode. | |
891 | */ | |
4e69d106 | 892 | void |
c9ba0248 KM |
893 | dqflush(vp) |
894 | register struct vnode *vp; | |
895 | { | |
2a3c3dee KM |
896 | register struct dquot *dq, *nextdq; |
897 | struct dqhash *dqh; | |
c9ba0248 KM |
898 | |
899 | /* | |
900 | * Move all dquot's that used to refer to this quota | |
901 | * file off their hash chains (they will eventually | |
902 | * fall off the head of the free list and be re-used). | |
903 | */ | |
2a3c3dee KM |
904 | for (dqh = &dqhashtbl[dqhash]; dqh >= dqhashtbl; dqh--) { |
905 | for (dq = dqh->lh_first; dq; dq = nextdq) { | |
906 | nextdq = dq->dq_hash.le_next; | |
c9ba0248 KM |
907 | if (dq->dq_ump->um_quotas[dq->dq_type] != vp) |
908 | continue; | |
909 | if (dq->dq_cnt) | |
910 | panic("dqflush: stray dquot"); | |
2a3c3dee | 911 | LIST_REMOVE(dq, dq_hash); |
c9ba0248 KM |
912 | dq->dq_ump = (struct ufsmount *)0; |
913 | } | |
914 | } | |
915 | } |