2 * Copyright (c) 1982, 1986, 1990, 1993, 1995
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
6 * Robert Elz at The University of Melbourne.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
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
36 * @(#)ufs_quota.c 8.5 (Berkeley) 5/20/95
37 * $FreeBSD: src/sys/ufs/ufs/ufs_quota.c,v 1.27.2.3 2002/01/15 10:33:32 phk Exp $
38 * $DragonFly: src/sys/vfs/ufs/ufs_quota.c,v 1.2 2003/06/17 04:29:00 dillon Exp $
41 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/kernel.h>
44 #include <sys/namei.h>
45 #include <sys/malloc.h>
46 #include <sys/fcntl.h>
48 #include <sys/vnode.h>
49 #include <sys/mount.h>
50 #include <vm/vm_zone.h>
52 #include <ufs/ufs/quota.h>
53 #include <ufs/ufs/inode.h>
54 #include <ufs/ufs/ufsmount.h>
56 static MALLOC_DEFINE(M_DQUOT, "UFS quota", "UFS quota entries");
59 * Quota name to error message mapping.
61 static char *quotatypes[] = INITQFNAMES;
63 static int chkdqchg __P((struct inode *, long, struct ucred *, int));
64 static int chkiqchg __P((struct inode *, long, struct ucred *, int));
65 static int dqget __P((struct vnode *,
66 u_long, struct ufsmount *, int, struct dquot **));
67 static int dqsync __P((struct vnode *, struct dquot *));
68 static void dqflush __P((struct vnode *));
71 static void dqref __P((struct dquot *));
72 static void chkdquot __P((struct inode *));
76 * Set up the quotas for an inode.
78 * This routine completely defines the semantics of quotas.
79 * If other criterion want to be used to establish quotas, the
80 * MAXQUOTAS value in quotas.h should be increased, and the
81 * additional dquots set up here.
85 register struct inode *ip;
88 struct vnode *vp = ITOV(ip);
91 ump = VFSTOUFS(vp->v_mount);
93 * Set up the user quota based on file uid.
94 * EINVAL means that quotas are not enabled.
96 if (ip->i_dquot[USRQUOTA] == NODQUOT &&
98 dqget(vp, ip->i_uid, ump, USRQUOTA, &ip->i_dquot[USRQUOTA])) &&
102 * Set up the group quota based on file gid.
103 * EINVAL means that quotas are not enabled.
105 if (ip->i_dquot[GRPQUOTA] == NODQUOT &&
107 dqget(vp, ip->i_gid, ump, GRPQUOTA, &ip->i_dquot[GRPQUOTA])) &&
114 * Update disk usage, and take corrective action.
117 chkdq(ip, change, cred, flags)
118 register struct inode *ip;
123 register struct dquot *dq;
125 int ncurblocks, error;
128 if ((flags & CHOWN) == 0)
134 for (i = 0; i < MAXQUOTAS; i++) {
135 if ((dq = ip->i_dquot[i]) == NODQUOT)
137 while (dq->dq_flags & DQ_LOCK) {
138 dq->dq_flags |= DQ_WANT;
139 (void) tsleep((caddr_t)dq, PINOD+1, "chkdq1", 0);
141 ncurblocks = dq->dq_curblocks + change;
143 dq->dq_curblocks = ncurblocks;
145 dq->dq_curblocks = 0;
146 dq->dq_flags &= ~DQ_BLKS;
147 dq->dq_flags |= DQ_MOD;
151 if ((flags & FORCE) == 0 && cred->cr_uid != 0) {
152 for (i = 0; i < MAXQUOTAS; i++) {
153 if ((dq = ip->i_dquot[i]) == NODQUOT)
155 error = chkdqchg(ip, change, cred, i);
160 for (i = 0; i < MAXQUOTAS; i++) {
161 if ((dq = ip->i_dquot[i]) == NODQUOT)
163 while (dq->dq_flags & DQ_LOCK) {
164 dq->dq_flags |= DQ_WANT;
165 (void) tsleep((caddr_t)dq, PINOD+1, "chkdq2", 0);
167 /* Reset timer when crossing soft limit */
168 if (dq->dq_curblocks + change >= dq->dq_bsoftlimit &&
169 dq->dq_curblocks < dq->dq_bsoftlimit)
170 dq->dq_btime = time_second +
171 VFSTOUFS(ITOV(ip)->v_mount)->um_btime[i];
172 dq->dq_curblocks += change;
173 dq->dq_flags |= DQ_MOD;
179 * Check for a valid change to a users allocation.
180 * Issue an error message if appropriate.
183 chkdqchg(ip, change, cred, type)
189 register struct dquot *dq = ip->i_dquot[type];
190 long ncurblocks = dq->dq_curblocks + change;
193 * If user would exceed their hard limit, disallow space allocation.
195 if (ncurblocks >= dq->dq_bhardlimit && dq->dq_bhardlimit) {
196 if ((dq->dq_flags & DQ_BLKS) == 0 &&
197 ip->i_uid == cred->cr_uid) {
198 uprintf("\n%s: write failed, %s disk limit reached\n",
199 ITOV(ip)->v_mount->mnt_stat.f_mntonname,
201 dq->dq_flags |= DQ_BLKS;
206 * If user is over their soft limit for too long, disallow space
207 * allocation. Reset time limit as they cross their soft limit.
209 if (ncurblocks >= dq->dq_bsoftlimit && dq->dq_bsoftlimit) {
210 if (dq->dq_curblocks < dq->dq_bsoftlimit) {
211 dq->dq_btime = time_second +
212 VFSTOUFS(ITOV(ip)->v_mount)->um_btime[type];
213 if (ip->i_uid == cred->cr_uid)
214 uprintf("\n%s: warning, %s %s\n",
215 ITOV(ip)->v_mount->mnt_stat.f_mntonname,
216 quotatypes[type], "disk quota exceeded");
219 if (time_second > dq->dq_btime) {
220 if ((dq->dq_flags & DQ_BLKS) == 0 &&
221 ip->i_uid == cred->cr_uid) {
222 uprintf("\n%s: write failed, %s %s\n",
223 ITOV(ip)->v_mount->mnt_stat.f_mntonname,
225 "disk quota exceeded for too long");
226 dq->dq_flags |= DQ_BLKS;
235 * Check the inode limit, applying corrective action.
238 chkiq(ip, change, cred, flags)
239 register struct inode *ip;
244 register struct dquot *dq;
246 int ncurinodes, error;
249 if ((flags & CHOWN) == 0)
255 for (i = 0; i < MAXQUOTAS; i++) {
256 if ((dq = ip->i_dquot[i]) == NODQUOT)
258 while (dq->dq_flags & DQ_LOCK) {
259 dq->dq_flags |= DQ_WANT;
260 (void) tsleep((caddr_t)dq, PINOD+1, "chkiq1", 0);
262 ncurinodes = dq->dq_curinodes + change;
264 dq->dq_curinodes = ncurinodes;
266 dq->dq_curinodes = 0;
267 dq->dq_flags &= ~DQ_INODS;
268 dq->dq_flags |= DQ_MOD;
272 if ((flags & FORCE) == 0 && cred->cr_uid != 0) {
273 for (i = 0; i < MAXQUOTAS; i++) {
274 if ((dq = ip->i_dquot[i]) == NODQUOT)
276 error = chkiqchg(ip, change, cred, i);
281 for (i = 0; i < MAXQUOTAS; i++) {
282 if ((dq = ip->i_dquot[i]) == NODQUOT)
284 while (dq->dq_flags & DQ_LOCK) {
285 dq->dq_flags |= DQ_WANT;
286 (void) tsleep((caddr_t)dq, PINOD+1, "chkiq2", 0);
288 /* Reset timer when crossing soft limit */
289 if (dq->dq_curinodes + change >= dq->dq_isoftlimit &&
290 dq->dq_curinodes < dq->dq_isoftlimit)
291 dq->dq_itime = time_second +
292 VFSTOUFS(ITOV(ip)->v_mount)->um_itime[i];
293 dq->dq_curinodes += change;
294 dq->dq_flags |= DQ_MOD;
300 * Check for a valid change to a users allocation.
301 * Issue an error message if appropriate.
304 chkiqchg(ip, change, cred, type)
310 register struct dquot *dq = ip->i_dquot[type];
311 long ncurinodes = dq->dq_curinodes + change;
314 * If user would exceed their hard limit, disallow inode allocation.
316 if (ncurinodes >= dq->dq_ihardlimit && dq->dq_ihardlimit) {
317 if ((dq->dq_flags & DQ_INODS) == 0 &&
318 ip->i_uid == cred->cr_uid) {
319 uprintf("\n%s: write failed, %s inode limit reached\n",
320 ITOV(ip)->v_mount->mnt_stat.f_mntonname,
322 dq->dq_flags |= DQ_INODS;
327 * If user is over their soft limit for too long, disallow inode
328 * allocation. Reset time limit as they cross their soft limit.
330 if (ncurinodes >= dq->dq_isoftlimit && dq->dq_isoftlimit) {
331 if (dq->dq_curinodes < dq->dq_isoftlimit) {
332 dq->dq_itime = time_second +
333 VFSTOUFS(ITOV(ip)->v_mount)->um_itime[type];
334 if (ip->i_uid == cred->cr_uid)
335 uprintf("\n%s: warning, %s %s\n",
336 ITOV(ip)->v_mount->mnt_stat.f_mntonname,
337 quotatypes[type], "inode quota exceeded");
340 if (time_second > dq->dq_itime) {
341 if ((dq->dq_flags & DQ_INODS) == 0 &&
342 ip->i_uid == cred->cr_uid) {
343 uprintf("\n%s: write failed, %s %s\n",
344 ITOV(ip)->v_mount->mnt_stat.f_mntonname,
346 "inode quota exceeded for too long");
347 dq->dq_flags |= DQ_INODS;
357 * On filesystems with quotas enabled, it is an error for a file to change
358 * size and not to have a dquot structure associated with it.
362 register struct inode *ip;
364 struct ufsmount *ump = VFSTOUFS(ITOV(ip)->v_mount);
367 for (i = 0; i < MAXQUOTAS; i++) {
368 if (ump->um_quotas[i] == NULLVP ||
369 (ump->um_qflags[i] & (QTF_OPENING|QTF_CLOSING)))
371 if (ip->i_dquot[i] == NODQUOT) {
372 vprint("chkdquot: missing dquot", ITOV(ip));
373 panic("chkdquot: missing dquot");
380 * Code to process quotactl commands.
384 * Q_QUOTAON - set up a quota file for a particular file system.
387 quotaon(p, mp, type, fname)
393 struct ufsmount *ump = VFSTOUFS(mp);
394 struct vnode *vp, **vpp;
395 struct vnode *nextvp;
400 vpp = &ump->um_quotas[type];
401 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, fname, p);
402 error = vn_open(&nd, FREAD|FWRITE, 0);
405 NDFREE(&nd, NDF_ONLY_PNBUF);
407 VOP_UNLOCK(vp, 0, p);
408 if (vp->v_type != VREG) {
409 (void) vn_close(vp, FREAD|FWRITE, p->p_ucred, p);
413 quotaoff(p, mp, type);
414 ump->um_qflags[type] |= QTF_OPENING;
415 mp->mnt_flag |= MNT_QUOTA;
416 vp->v_flag |= VSYSTEM;
419 * Save the credential of the process that turned on quotas.
420 * Set up the time limits for this quota.
423 ump->um_cred[type] = p->p_ucred;
424 ump->um_btime[type] = MAX_DQ_TIME;
425 ump->um_itime[type] = MAX_IQ_TIME;
426 if (dqget(NULLVP, 0, ump, type, &dq) == 0) {
427 if (dq->dq_btime > 0)
428 ump->um_btime[type] = dq->dq_btime;
429 if (dq->dq_itime > 0)
430 ump->um_itime[type] = dq->dq_itime;
434 * Search vnodes associated with this mount point,
435 * adding references to quota file being opened.
436 * NB: only need to add dquot's for inodes being modified.
439 for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist); vp != NULL; vp = nextvp) {
440 nextvp = TAILQ_NEXT(vp, v_nmntvnodes);
441 if (vp->v_type == VNON || vp->v_writecount == 0)
443 if (vget(vp, LK_EXCLUSIVE, p))
445 error = getinoquota(VTOI(vp));
451 if (TAILQ_NEXT(vp, v_nmntvnodes) != nextvp || vp->v_mount != mp)
454 ump->um_qflags[type] &= ~QTF_OPENING;
456 quotaoff(p, mp, type);
461 * Q_QUOTAOFF - turn off disk quotas for a filesystem.
464 quotaoff(p, mp, type)
470 struct vnode *qvp, *nextvp;
471 struct ufsmount *ump = VFSTOUFS(mp);
476 if ((qvp = ump->um_quotas[type]) == NULLVP)
478 ump->um_qflags[type] |= QTF_CLOSING;
480 * Search vnodes associated with this mount point,
481 * deleting any references to quota file being closed.
484 for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist); vp != NULL; vp = nextvp) {
485 nextvp = TAILQ_NEXT(vp, v_nmntvnodes);
486 if (vp->v_type == VNON)
488 if (vget(vp, LK_EXCLUSIVE, p))
491 dq = ip->i_dquot[type];
492 ip->i_dquot[type] = NODQUOT;
495 if (TAILQ_NEXT(vp, v_nmntvnodes) != nextvp || vp->v_mount != mp)
499 qvp->v_flag &= ~VSYSTEM;
500 error = vn_close(qvp, FREAD|FWRITE, p->p_ucred, p);
501 ump->um_quotas[type] = NULLVP;
502 crfree(ump->um_cred[type]);
503 ump->um_cred[type] = NOCRED;
504 ump->um_qflags[type] &= ~QTF_CLOSING;
505 for (type = 0; type < MAXQUOTAS; type++)
506 if (ump->um_quotas[type] != NULLVP)
508 if (type == MAXQUOTAS)
509 mp->mnt_flag &= ~MNT_QUOTA;
514 * Q_GETQUOTA - return current values in a dqblk structure.
517 getquota(mp, id, type, addr)
526 error = dqget(NULLVP, id, VFSTOUFS(mp), type, &dq);
529 error = copyout((caddr_t)&dq->dq_dqb, addr, sizeof (struct dqblk));
535 * Q_SETQUOTA - assign an entire dqblk structure.
538 setquota(mp, id, type, addr)
544 register struct dquot *dq;
546 struct ufsmount *ump = VFSTOUFS(mp);
550 error = copyin(addr, (caddr_t)&newlim, sizeof (struct dqblk));
553 error = dqget(NULLVP, id, ump, type, &ndq);
557 while (dq->dq_flags & DQ_LOCK) {
558 dq->dq_flags |= DQ_WANT;
559 (void) tsleep((caddr_t)dq, PINOD+1, "setqta", 0);
562 * Copy all but the current values.
563 * Reset time limit if previously had no soft limit or were
564 * under it, but now have a soft limit and are over it.
566 newlim.dqb_curblocks = dq->dq_curblocks;
567 newlim.dqb_curinodes = dq->dq_curinodes;
568 if (dq->dq_id != 0) {
569 newlim.dqb_btime = dq->dq_btime;
570 newlim.dqb_itime = dq->dq_itime;
572 if (newlim.dqb_bsoftlimit &&
573 dq->dq_curblocks >= newlim.dqb_bsoftlimit &&
574 (dq->dq_bsoftlimit == 0 || dq->dq_curblocks < dq->dq_bsoftlimit))
575 newlim.dqb_btime = time_second + ump->um_btime[type];
576 if (newlim.dqb_isoftlimit &&
577 dq->dq_curinodes >= newlim.dqb_isoftlimit &&
578 (dq->dq_isoftlimit == 0 || dq->dq_curinodes < dq->dq_isoftlimit))
579 newlim.dqb_itime = time_second + ump->um_itime[type];
581 if (dq->dq_curblocks < dq->dq_bsoftlimit)
582 dq->dq_flags &= ~DQ_BLKS;
583 if (dq->dq_curinodes < dq->dq_isoftlimit)
584 dq->dq_flags &= ~DQ_INODS;
585 if (dq->dq_isoftlimit == 0 && dq->dq_bsoftlimit == 0 &&
586 dq->dq_ihardlimit == 0 && dq->dq_bhardlimit == 0)
587 dq->dq_flags |= DQ_FAKE;
589 dq->dq_flags &= ~DQ_FAKE;
590 dq->dq_flags |= DQ_MOD;
596 * Q_SETUSE - set current inode and block usage.
599 setuse(mp, id, type, addr)
605 register struct dquot *dq;
606 struct ufsmount *ump = VFSTOUFS(mp);
611 error = copyin(addr, (caddr_t)&usage, sizeof (struct dqblk));
614 error = dqget(NULLVP, id, ump, type, &ndq);
618 while (dq->dq_flags & DQ_LOCK) {
619 dq->dq_flags |= DQ_WANT;
620 (void) tsleep((caddr_t)dq, PINOD+1, "setuse", 0);
623 * Reset time limit if have a soft limit and were
624 * previously under it, but are now over it.
626 if (dq->dq_bsoftlimit && dq->dq_curblocks < dq->dq_bsoftlimit &&
627 usage.dqb_curblocks >= dq->dq_bsoftlimit)
628 dq->dq_btime = time_second + ump->um_btime[type];
629 if (dq->dq_isoftlimit && dq->dq_curinodes < dq->dq_isoftlimit &&
630 usage.dqb_curinodes >= dq->dq_isoftlimit)
631 dq->dq_itime = time_second + ump->um_itime[type];
632 dq->dq_curblocks = usage.dqb_curblocks;
633 dq->dq_curinodes = usage.dqb_curinodes;
634 if (dq->dq_curblocks < dq->dq_bsoftlimit)
635 dq->dq_flags &= ~DQ_BLKS;
636 if (dq->dq_curinodes < dq->dq_isoftlimit)
637 dq->dq_flags &= ~DQ_INODS;
638 dq->dq_flags |= DQ_MOD;
644 * Q_SYNC - sync quota files to disk.
650 struct ufsmount *ump = VFSTOUFS(mp);
651 struct proc *p = curproc; /* XXX */
652 struct vnode *vp, *nextvp;
657 * Check if the mount point has any quotas.
658 * If not, simply return.
660 for (i = 0; i < MAXQUOTAS; i++)
661 if (ump->um_quotas[i] != NULLVP)
666 * Search vnodes associated with this mount point,
667 * synchronizing any modified dquot structures.
669 simple_lock(&mntvnode_slock);
671 for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist); vp != NULL; vp = nextvp) {
672 if (vp->v_mount != mp)
674 nextvp = TAILQ_NEXT(vp, v_nmntvnodes);
675 if (vp->v_type == VNON)
677 simple_lock(&vp->v_interlock);
678 simple_unlock(&mntvnode_slock);
679 error = vget(vp, LK_EXCLUSIVE | LK_NOWAIT | LK_INTERLOCK, p);
681 simple_lock(&mntvnode_slock);
686 for (i = 0; i < MAXQUOTAS; i++) {
687 dq = VTOI(vp)->i_dquot[i];
688 if (dq != NODQUOT && (dq->dq_flags & DQ_MOD))
692 simple_lock(&mntvnode_slock);
693 if (TAILQ_NEXT(vp, v_nmntvnodes) != nextvp)
696 simple_unlock(&mntvnode_slock);
701 * Code pertaining to management of the in-core dquot data structures.
703 #define DQHASH(dqvp, id) \
704 (&dqhashtbl[((((intptr_t)(dqvp)) >> 8) + id) & dqhash])
705 static LIST_HEAD(dqhash, dquot) *dqhashtbl;
706 static u_long dqhash;
711 #define DQUOTINC 5 /* minimum free dquots desired */
712 static TAILQ_HEAD(dqfreelist, dquot) dqfreelist;
713 static long numdquot, desireddquot = DQUOTINC;
716 * Initialize the quota system.
722 dqhashtbl = hashinit(desiredvnodes, M_DQUOT, &dqhash);
723 TAILQ_INIT(&dqfreelist);
727 * Obtain a dquot structure for the specified identifier and quota file
728 * reading the information from the file if necessary.
731 dqget(vp, id, ump, type, dqp)
734 register struct ufsmount *ump;
738 struct proc *p = curproc; /* XXX */
746 dqvp = ump->um_quotas[type];
747 if (dqvp == NULLVP || (ump->um_qflags[type] & QTF_CLOSING)) {
752 * Check the cache first.
754 dqh = DQHASH(dqvp, id);
755 for (dq = dqh->lh_first; dq; dq = dq->dq_hash.le_next) {
756 if (dq->dq_id != id ||
757 dq->dq_ump->um_quotas[dq->dq_type] != dqvp)
760 * Cache hit with no references. Take
761 * the structure off the free list.
764 TAILQ_REMOVE(&dqfreelist, dq, dq_freelist);
770 * Not in cache, allocate a new one.
772 if (dqfreelist.tqh_first == NODQUOT &&
773 numdquot < MAXQUOTAS * desiredvnodes)
774 desireddquot += DQUOTINC;
775 if (numdquot < desireddquot) {
776 dq = (struct dquot *)malloc(sizeof *dq, M_DQUOT, M_WAITOK);
777 bzero((char *)dq, sizeof *dq);
780 if ((dq = dqfreelist.tqh_first) == NULL) {
785 if (dq->dq_cnt || (dq->dq_flags & DQ_MOD))
786 panic("dqget: free dquot isn't");
787 TAILQ_REMOVE(&dqfreelist, dq, dq_freelist);
788 if (dq->dq_ump != NULL)
789 LIST_REMOVE(dq, dq_hash);
792 * Initialize the contents of the dquot structure.
795 vn_lock(dqvp, LK_EXCLUSIVE | LK_RETRY, p);
796 LIST_INSERT_HEAD(dqh, dq, dq_hash);
798 dq->dq_flags = DQ_LOCK;
802 auio.uio_iov = &aiov;
804 aiov.iov_base = (caddr_t)&dq->dq_dqb;
805 aiov.iov_len = sizeof (struct dqblk);
806 auio.uio_resid = sizeof (struct dqblk);
807 auio.uio_offset = (off_t)(id * sizeof (struct dqblk));
808 auio.uio_segflg = UIO_SYSSPACE;
809 auio.uio_rw = UIO_READ;
810 auio.uio_procp = (struct proc *)0;
811 error = VOP_READ(dqvp, &auio, 0, ump->um_cred[type]);
812 if (auio.uio_resid == sizeof(struct dqblk) && error == 0)
813 bzero((caddr_t)&dq->dq_dqb, sizeof(struct dqblk));
815 VOP_UNLOCK(dqvp, 0, p);
816 if (dq->dq_flags & DQ_WANT)
820 * I/O error in reading quota file, release
821 * quota structure and reflect problem to caller.
824 LIST_REMOVE(dq, dq_hash);
830 * Check for no limit to enforce.
831 * Initialize time values if necessary.
833 if (dq->dq_isoftlimit == 0 && dq->dq_bsoftlimit == 0 &&
834 dq->dq_ihardlimit == 0 && dq->dq_bhardlimit == 0)
835 dq->dq_flags |= DQ_FAKE;
836 if (dq->dq_id != 0) {
837 if (dq->dq_btime == 0)
838 dq->dq_btime = time_second + ump->um_btime[type];
839 if (dq->dq_itime == 0)
840 dq->dq_itime = time_second + ump->um_itime[type];
848 * Obtain a reference to a dquot.
860 * Release a reference to a dquot.
865 register struct dquot *dq;
870 if (dq->dq_cnt > 1) {
874 if (dq->dq_flags & DQ_MOD)
875 (void) dqsync(vp, dq);
876 if (--dq->dq_cnt > 0)
878 TAILQ_INSERT_TAIL(&dqfreelist, dq, dq_freelist);
882 * Update the disk quota in the quota file.
889 struct proc *p = curproc; /* XXX */
896 panic("dqsync: dquot");
897 if ((dq->dq_flags & DQ_MOD) == 0)
899 if ((dqvp = dq->dq_ump->um_quotas[dq->dq_type]) == NULLVP)
900 panic("dqsync: file");
902 vn_lock(dqvp, LK_EXCLUSIVE | LK_RETRY, p);
903 while (dq->dq_flags & DQ_LOCK) {
904 dq->dq_flags |= DQ_WANT;
905 (void) tsleep((caddr_t)dq, PINOD+2, "dqsync", 0);
906 if ((dq->dq_flags & DQ_MOD) == 0) {
908 VOP_UNLOCK(dqvp, 0, p);
912 dq->dq_flags |= DQ_LOCK;
913 auio.uio_iov = &aiov;
915 aiov.iov_base = (caddr_t)&dq->dq_dqb;
916 aiov.iov_len = sizeof (struct dqblk);
917 auio.uio_resid = sizeof (struct dqblk);
918 auio.uio_offset = (off_t)(dq->dq_id * sizeof (struct dqblk));
919 auio.uio_segflg = UIO_SYSSPACE;
920 auio.uio_rw = UIO_WRITE;
921 auio.uio_procp = (struct proc *)0;
922 error = VOP_WRITE(dqvp, &auio, 0, dq->dq_ump->um_cred[dq->dq_type]);
923 if (auio.uio_resid && error == 0)
925 if (dq->dq_flags & DQ_WANT)
927 dq->dq_flags &= ~(DQ_MOD|DQ_LOCK|DQ_WANT);
929 VOP_UNLOCK(dqvp, 0, p);
934 * Flush all entries from the cache for a particular vnode.
938 register struct vnode *vp;
940 register struct dquot *dq, *nextdq;
944 * Move all dquot's that used to refer to this quota
945 * file off their hash chains (they will eventually
946 * fall off the head of the free list and be re-used).
948 for (dqh = &dqhashtbl[dqhash]; dqh >= dqhashtbl; dqh--) {
949 for (dq = dqh->lh_first; dq; dq = nextdq) {
950 nextdq = dq->dq_hash.le_next;
951 if (dq->dq_ump->um_quotas[dq->dq_type] != vp)
954 panic("dqflush: stray dquot");
955 LIST_REMOVE(dq, dq_hash);
956 dq->dq_ump = (struct ufsmount *)0;