2 * Copyright (c) 2008 Dag-Erling Coïdan Smørgrav
3 * Copyright (c) 2008 Marshall Kirk McKusick
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer
11 * in this position and unchanged.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 #include <sys/types.h>
32 #include <sys/endian.h>
33 #include <sys/mount.h>
36 #include <ufs/ufs/quota.h>
51 int fd; /* -1 means using quotactl for access */
52 int accmode; /* access mode */
53 int wordsize; /* 32-bit or 64-bit limits */
54 int quotatype; /* USRQUOTA or GRPQUOTA */
55 dev_t dev; /* device */
56 char fsname[MAXPATHLEN + 1]; /* mount point of filesystem */
57 char qfname[MAXPATHLEN + 1]; /* quota file if not using quotactl */
60 static const char *qfextension[] = INITQFNAMES;
63 * Check to see if a particular quota is to be enabled.
66 hasquota(struct fstab *fs, int type, char *qfnamep, int qfbufsize)
72 static char initname, usrname[100], grpname[100];
75 * 1) we only need one of these
76 * 2) fstab may specify a different filename
79 (void)snprintf(usrname, sizeof(usrname), "%s%s",
80 qfextension[USRQUOTA], QUOTAFILENAME);
81 (void)snprintf(grpname, sizeof(grpname), "%s%s",
82 qfextension[GRPQUOTA], QUOTAFILENAME);
85 strcpy(buf, fs->fs_mntops);
86 for (opt = strtok(buf, ","); opt; opt = strtok(NULL, ",")) {
87 if ((cp = strchr(opt, '=')))
89 if (type == USRQUOTA && strcmp(opt, usrname) == 0)
91 if (type == GRPQUOTA && strcmp(opt, grpname) == 0)
97 * Ensure that the filesystem is mounted.
99 if (statfs(fs->fs_file, &sfb) != 0 ||
100 strcmp(fs->fs_file, sfb.f_mntonname)) {
104 strncpy(qfnamep, cp, qfbufsize);
106 (void)snprintf(qfnamep, qfbufsize, "%s/%s.%s", fs->fs_file,
107 QUOTAFILENAME, qfextension[type]);
113 quota_open(struct fstab *fs, int quotatype, int openflags)
115 struct quotafile *qf;
121 if (strcmp(fs->fs_vfstype, "ufs"))
123 if ((qf = calloc(1, sizeof(*qf))) == NULL)
126 qf->quotatype = quotatype;
127 strlcpy(qf->fsname, fs->fs_file, sizeof(qf->fsname));
128 if (stat(qf->fsname, &st) != 0)
131 serrno = hasquota(fs, quotatype, qf->qfname, sizeof(qf->qfname));
132 qcmd = QCMD(Q_GETQUOTASIZE, quotatype);
133 if (quotactl(qf->fsname, qcmd, 0, &qf->wordsize) == 0)
139 qf->accmode = openflags & O_ACCMODE;
140 if ((qf->fd = open(qf->qfname, qf->accmode|O_CLOEXEC)) < 0 &&
141 (openflags & O_CREAT) != O_CREAT)
143 /* File open worked, so process it */
146 switch (read(qf->fd, &dqh, sizeof(dqh))) {
150 if (strcmp(dqh.dqh_magic, Q_DQHDR64_MAGIC) != 0) {
151 /* no magic, assume 32 bits */
155 if (be32toh(dqh.dqh_version) != Q_DQHDR64_VERSION ||
156 be32toh(dqh.dqh_hdrlen) != sizeof(struct dqhdr64) ||
157 be32toh(dqh.dqh_reclen) != sizeof(struct dqblk64)) {
158 /* correct magic, wrong version / lengths */
170 /* open failed, but O_CREAT was specified, so create a new file */
171 if ((qf->fd = open(qf->qfname, O_RDWR|O_CREAT|O_TRUNC|O_CLOEXEC, 0)) <
175 memset(&dqh, 0, sizeof(dqh));
176 memcpy(dqh.dqh_magic, Q_DQHDR64_MAGIC, sizeof(dqh.dqh_magic));
177 dqh.dqh_version = htobe32(Q_DQHDR64_VERSION);
178 dqh.dqh_hdrlen = htobe32(sizeof(struct dqhdr64));
179 dqh.dqh_reclen = htobe32(sizeof(struct dqblk64));
180 if (write(qf->fd, &dqh, sizeof(dqh)) != sizeof(dqh)) {
181 /* it was one we created ourselves */
185 grp = getgrnam(QUOTAGROUP);
186 fchown(qf->fd, 0, grp ? grp->gr_gid : 0);
187 fchmod(qf->fd, 0640);
191 /* did we have an open file? */
200 quota_close(struct quotafile *qf)
209 quota_on(struct quotafile *qf)
213 qcmd = QCMD(Q_QUOTAON, qf->quotatype);
214 return (quotactl(qf->fsname, qcmd, 0, qf->qfname));
218 quota_off(struct quotafile *qf)
221 return (quotactl(qf->fsname, QCMD(Q_QUOTAOFF, qf->quotatype), 0, 0));
225 quota_fsname(const struct quotafile *qf)
232 quota_qfname(const struct quotafile *qf)
239 quota_check_path(const struct quotafile *qf, const char *path)
243 if (stat(path, &st) == -1)
245 return (st.st_dev == qf->dev);
249 quota_maxid(struct quotafile *qf)
254 if (stat(qf->qfname, &st) < 0)
256 switch (qf->wordsize) {
258 maxid = st.st_size / sizeof(struct dqblk32) - 1;
261 maxid = st.st_size / sizeof(struct dqblk64) - 2;
267 return (maxid > 0 ? maxid : 0);
271 quota_read32(struct quotafile *qf, struct dqblk *dqb, int id)
273 struct dqblk32 dqb32;
276 off = id * sizeof(struct dqblk32);
277 if (lseek(qf->fd, off, SEEK_SET) == -1)
279 switch (read(qf->fd, &dqb32, sizeof(dqb32))) {
281 memset(dqb, 0, sizeof(*dqb));
284 dqb->dqb_bhardlimit = dqb32.dqb_bhardlimit;
285 dqb->dqb_bsoftlimit = dqb32.dqb_bsoftlimit;
286 dqb->dqb_curblocks = dqb32.dqb_curblocks;
287 dqb->dqb_ihardlimit = dqb32.dqb_ihardlimit;
288 dqb->dqb_isoftlimit = dqb32.dqb_isoftlimit;
289 dqb->dqb_curinodes = dqb32.dqb_curinodes;
290 dqb->dqb_btime = dqb32.dqb_btime;
291 dqb->dqb_itime = dqb32.dqb_itime;
299 quota_read64(struct quotafile *qf, struct dqblk *dqb, int id)
301 struct dqblk64 dqb64;
304 off = sizeof(struct dqhdr64) + id * sizeof(struct dqblk64);
305 if (lseek(qf->fd, off, SEEK_SET) == -1)
307 switch (read(qf->fd, &dqb64, sizeof(dqb64))) {
309 memset(dqb, 0, sizeof(*dqb));
312 dqb->dqb_bhardlimit = be64toh(dqb64.dqb_bhardlimit);
313 dqb->dqb_bsoftlimit = be64toh(dqb64.dqb_bsoftlimit);
314 dqb->dqb_curblocks = be64toh(dqb64.dqb_curblocks);
315 dqb->dqb_ihardlimit = be64toh(dqb64.dqb_ihardlimit);
316 dqb->dqb_isoftlimit = be64toh(dqb64.dqb_isoftlimit);
317 dqb->dqb_curinodes = be64toh(dqb64.dqb_curinodes);
318 dqb->dqb_btime = be64toh(dqb64.dqb_btime);
319 dqb->dqb_itime = be64toh(dqb64.dqb_itime);
327 quota_read(struct quotafile *qf, struct dqblk *dqb, int id)
332 qcmd = QCMD(Q_GETQUOTA, qf->quotatype);
333 return (quotactl(qf->fsname, qcmd, id, dqb));
335 switch (qf->wordsize) {
337 return (quota_read32(qf, dqb, id));
339 return (quota_read64(qf, dqb, id));
347 #define CLIP32(u64) ((u64) > UINT32_MAX ? UINT32_MAX : (uint32_t)(u64))
350 quota_write32(struct quotafile *qf, const struct dqblk *dqb, int id)
352 struct dqblk32 dqb32;
355 dqb32.dqb_bhardlimit = CLIP32(dqb->dqb_bhardlimit);
356 dqb32.dqb_bsoftlimit = CLIP32(dqb->dqb_bsoftlimit);
357 dqb32.dqb_curblocks = CLIP32(dqb->dqb_curblocks);
358 dqb32.dqb_ihardlimit = CLIP32(dqb->dqb_ihardlimit);
359 dqb32.dqb_isoftlimit = CLIP32(dqb->dqb_isoftlimit);
360 dqb32.dqb_curinodes = CLIP32(dqb->dqb_curinodes);
361 dqb32.dqb_btime = CLIP32(dqb->dqb_btime);
362 dqb32.dqb_itime = CLIP32(dqb->dqb_itime);
364 off = id * sizeof(struct dqblk32);
365 if (lseek(qf->fd, off, SEEK_SET) == -1)
367 if (write(qf->fd, &dqb32, sizeof(dqb32)) == sizeof(dqb32))
373 quota_write64(struct quotafile *qf, const struct dqblk *dqb, int id)
375 struct dqblk64 dqb64;
378 dqb64.dqb_bhardlimit = htobe64(dqb->dqb_bhardlimit);
379 dqb64.dqb_bsoftlimit = htobe64(dqb->dqb_bsoftlimit);
380 dqb64.dqb_curblocks = htobe64(dqb->dqb_curblocks);
381 dqb64.dqb_ihardlimit = htobe64(dqb->dqb_ihardlimit);
382 dqb64.dqb_isoftlimit = htobe64(dqb->dqb_isoftlimit);
383 dqb64.dqb_curinodes = htobe64(dqb->dqb_curinodes);
384 dqb64.dqb_btime = htobe64(dqb->dqb_btime);
385 dqb64.dqb_itime = htobe64(dqb->dqb_itime);
387 off = sizeof(struct dqhdr64) + id * sizeof(struct dqblk64);
388 if (lseek(qf->fd, off, SEEK_SET) == -1)
390 if (write(qf->fd, &dqb64, sizeof(dqb64)) == sizeof(dqb64))
396 quota_write_usage(struct quotafile *qf, struct dqblk *dqb, int id)
402 qcmd = QCMD(Q_SETUSE, qf->quotatype);
403 return (quotactl(qf->fsname, qcmd, id, dqb));
406 * Have to do read-modify-write of quota in file.
408 if ((qf->accmode & O_RDWR) != O_RDWR) {
412 if (quota_read(qf, &dqbuf, id) != 0)
415 * Reset time limit if have a soft limit and were
416 * previously under it, but are now over it.
418 if (dqbuf.dqb_bsoftlimit && id != 0 &&
419 dqbuf.dqb_curblocks < dqbuf.dqb_bsoftlimit &&
420 dqb->dqb_curblocks >= dqbuf.dqb_bsoftlimit)
422 if (dqbuf.dqb_isoftlimit && id != 0 &&
423 dqbuf.dqb_curinodes < dqbuf.dqb_isoftlimit &&
424 dqb->dqb_curinodes >= dqbuf.dqb_isoftlimit)
426 dqbuf.dqb_curinodes = dqb->dqb_curinodes;
427 dqbuf.dqb_curblocks = dqb->dqb_curblocks;
431 switch (qf->wordsize) {
433 return (quota_write32(qf, &dqbuf, id));
435 return (quota_write64(qf, &dqbuf, id));
444 quota_write_limits(struct quotafile *qf, struct dqblk *dqb, int id)
450 qcmd = QCMD(Q_SETQUOTA, qf->quotatype);
451 return (quotactl(qf->fsname, qcmd, id, dqb));
454 * Have to do read-modify-write of quota in file.
456 if ((qf->accmode & O_RDWR) != O_RDWR) {
460 if (quota_read(qf, &dqbuf, id) != 0)
463 * Reset time limit if have a soft limit and were
464 * previously under it, but are now over it
465 * or if there previously was no soft limit, but
466 * now have one and are over it.
468 if (dqbuf.dqb_bsoftlimit && id != 0 &&
469 dqbuf.dqb_curblocks < dqbuf.dqb_bsoftlimit &&
470 dqbuf.dqb_curblocks >= dqb->dqb_bsoftlimit)
472 if (dqbuf.dqb_bsoftlimit == 0 && id != 0 &&
473 dqb->dqb_bsoftlimit > 0 &&
474 dqbuf.dqb_curblocks >= dqb->dqb_bsoftlimit)
476 if (dqbuf.dqb_isoftlimit && id != 0 &&
477 dqbuf.dqb_curinodes < dqbuf.dqb_isoftlimit &&
478 dqbuf.dqb_curinodes >= dqb->dqb_isoftlimit)
480 if (dqbuf.dqb_isoftlimit == 0 && id !=0 &&
481 dqb->dqb_isoftlimit > 0 &&
482 dqbuf.dqb_curinodes >= dqb->dqb_isoftlimit)
484 dqb->dqb_curinodes = dqbuf.dqb_curinodes;
485 dqb->dqb_curblocks = dqbuf.dqb_curblocks;
489 switch (qf->wordsize) {
491 return (quota_write32(qf, dqb, id));
493 return (quota_write64(qf, dqb, id));
502 * Convert a quota file from one format to another.
505 quota_convert(struct quotafile *qf, int wordsize)
507 struct quotafile *newqf;
511 int serrno, maxid, id, fd;
514 * Quotas must not be active and quotafile must be open
515 * for reading and writing.
517 if ((qf->accmode & O_RDWR) != O_RDWR || qf->fd == -1) {
521 if ((wordsize != 32 && wordsize != 64) ||
522 wordsize == qf->wordsize) {
526 maxid = quota_maxid(qf);
527 if ((newqf = calloc(1, sizeof(*qf))) == NULL) {
532 snprintf(newqf->qfname, MAXPATHLEN + 1, "%s_%d.orig", qf->qfname,
534 if (rename(qf->qfname, newqf->qfname) < 0) {
538 if ((newqf->fd = open(qf->qfname, O_RDWR|O_CREAT|O_TRUNC|O_CLOEXEC,
543 newqf->wordsize = wordsize;
544 if (wordsize == 64) {
545 memset(&dqh, 0, sizeof(dqh));
546 memcpy(dqh.dqh_magic, Q_DQHDR64_MAGIC, sizeof(dqh.dqh_magic));
547 dqh.dqh_version = htobe32(Q_DQHDR64_VERSION);
548 dqh.dqh_hdrlen = htobe32(sizeof(struct dqhdr64));
549 dqh.dqh_reclen = htobe32(sizeof(struct dqblk64));
550 if (write(newqf->fd, &dqh, sizeof(dqh)) != sizeof(dqh)) {
555 grp = getgrnam(QUOTAGROUP);
556 fchown(newqf->fd, 0, grp ? grp->gr_gid : 0);
557 fchmod(newqf->fd, 0640);
558 for (id = 0; id <= maxid; id++) {
559 if ((quota_read(qf, &dqblk, id)) < 0)
561 switch (newqf->wordsize) {
563 if ((quota_write32(newqf, &dqblk, id)) < 0)
567 if ((quota_write64(newqf, &dqblk, id)) < 0)
580 * Update the passed in quotafile to reference the new file
581 * of the converted format size.
586 qf->wordsize = newqf->wordsize;
590 /* put back the original file */
591 (void) rename(newqf->qfname, qf->qfname);