1/*-
2 * Copyright (c) 2008 Dag-Erling Co��dan Sm��rgrav
3 * Copyright (c) 2008 Marshall Kirk McKusick
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
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.
15 *
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
26 * SUCH DAMAGE.
27 *
| 1/*-
2 * Copyright (c) 2008 Dag-Erling Co��dan Sm��rgrav
3 * Copyright (c) 2008 Marshall Kirk McKusick
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
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.
15 *
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
26 * SUCH DAMAGE.
27 *
|
28 * $FreeBSD: head/lib/libutil/quotafile.c 229403 2012-01-03 18:51:58Z ed $
| 28 * $FreeBSD: head/lib/libutil/quotafile.c 255007 2013-08-28 21:10:37Z jilles $
|
29 */
30
31#include <sys/types.h>
32#include <sys/endian.h>
33#include <sys/mount.h>
34#include <sys/stat.h>
35
36#include <ufs/ufs/quota.h>
37
38#include <errno.h>
39#include <fcntl.h>
40#include <fstab.h>
41#include <grp.h>
42#include <pwd.h>
43#include <libutil.h>
44#include <stdint.h>
45#include <stdio.h>
46#include <stdlib.h>
47#include <string.h>
48#include <unistd.h>
49
50struct quotafile {
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 */
58};
59
60static const char *qfextension[] = INITQFNAMES;
61
62/*
63 * Check to see if a particular quota is to be enabled.
64 */
65static int
66hasquota(struct fstab *fs, int type, char *qfnamep, int qfbufsize)
67{
68 char *opt;
69 char *cp;
70 struct statfs sfb;
71 char buf[BUFSIZ];
72 static char initname, usrname[100], grpname[100];
73
74 /*
75 * 1) we only need one of these
76 * 2) fstab may specify a different filename
77 */
78 if (!initname) {
79 (void)snprintf(usrname, sizeof(usrname), "%s%s",
80 qfextension[USRQUOTA], QUOTAFILENAME);
81 (void)snprintf(grpname, sizeof(grpname), "%s%s",
82 qfextension[GRPQUOTA], QUOTAFILENAME);
83 initname = 1;
84 }
85 strcpy(buf, fs->fs_mntops);
86 for (opt = strtok(buf, ","); opt; opt = strtok(NULL, ",")) {
87 if ((cp = strchr(opt, '=')))
88 *cp++ = '\0';
89 if (type == USRQUOTA && strcmp(opt, usrname) == 0)
90 break;
91 if (type == GRPQUOTA && strcmp(opt, grpname) == 0)
92 break;
93 }
94 if (!opt)
95 return (0);
96 /*
97 * Ensure that the filesystem is mounted.
98 */
99 if (statfs(fs->fs_file, &sfb) != 0 ||
100 strcmp(fs->fs_file, sfb.f_mntonname)) {
101 return (0);
102 }
103 if (cp) {
104 strncpy(qfnamep, cp, qfbufsize);
105 } else {
106 (void)snprintf(qfnamep, qfbufsize, "%s/%s.%s", fs->fs_file,
107 QUOTAFILENAME, qfextension[type]);
108 }
109 return (1);
110}
111
112struct quotafile *
113quota_open(struct fstab *fs, int quotatype, int openflags)
114{
115 struct quotafile *qf;
116 struct dqhdr64 dqh;
117 struct group *grp;
118 struct stat st;
119 int qcmd, serrno;
120
121 if (strcmp(fs->fs_vfstype, "ufs"))
122 return (NULL);
123 if ((qf = calloc(1, sizeof(*qf))) == NULL)
124 return (NULL);
125 qf->fd = -1;
126 qf->quotatype = quotatype;
127 strncpy(qf->fsname, fs->fs_file, sizeof(qf->fsname));
128 if (stat(qf->fsname, &st) != 0)
129 goto error;
130 qf->dev = st.st_dev;
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)
134 return (qf);
135 if (serrno == 0) {
136 errno = EOPNOTSUPP;
137 goto error;
138 }
139 qf->accmode = openflags & O_ACCMODE;
| 29 */
30
31#include <sys/types.h>
32#include <sys/endian.h>
33#include <sys/mount.h>
34#include <sys/stat.h>
35
36#include <ufs/ufs/quota.h>
37
38#include <errno.h>
39#include <fcntl.h>
40#include <fstab.h>
41#include <grp.h>
42#include <pwd.h>
43#include <libutil.h>
44#include <stdint.h>
45#include <stdio.h>
46#include <stdlib.h>
47#include <string.h>
48#include <unistd.h>
49
50struct quotafile {
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 */
58};
59
60static const char *qfextension[] = INITQFNAMES;
61
62/*
63 * Check to see if a particular quota is to be enabled.
64 */
65static int
66hasquota(struct fstab *fs, int type, char *qfnamep, int qfbufsize)
67{
68 char *opt;
69 char *cp;
70 struct statfs sfb;
71 char buf[BUFSIZ];
72 static char initname, usrname[100], grpname[100];
73
74 /*
75 * 1) we only need one of these
76 * 2) fstab may specify a different filename
77 */
78 if (!initname) {
79 (void)snprintf(usrname, sizeof(usrname), "%s%s",
80 qfextension[USRQUOTA], QUOTAFILENAME);
81 (void)snprintf(grpname, sizeof(grpname), "%s%s",
82 qfextension[GRPQUOTA], QUOTAFILENAME);
83 initname = 1;
84 }
85 strcpy(buf, fs->fs_mntops);
86 for (opt = strtok(buf, ","); opt; opt = strtok(NULL, ",")) {
87 if ((cp = strchr(opt, '=')))
88 *cp++ = '\0';
89 if (type == USRQUOTA && strcmp(opt, usrname) == 0)
90 break;
91 if (type == GRPQUOTA && strcmp(opt, grpname) == 0)
92 break;
93 }
94 if (!opt)
95 return (0);
96 /*
97 * Ensure that the filesystem is mounted.
98 */
99 if (statfs(fs->fs_file, &sfb) != 0 ||
100 strcmp(fs->fs_file, sfb.f_mntonname)) {
101 return (0);
102 }
103 if (cp) {
104 strncpy(qfnamep, cp, qfbufsize);
105 } else {
106 (void)snprintf(qfnamep, qfbufsize, "%s/%s.%s", fs->fs_file,
107 QUOTAFILENAME, qfextension[type]);
108 }
109 return (1);
110}
111
112struct quotafile *
113quota_open(struct fstab *fs, int quotatype, int openflags)
114{
115 struct quotafile *qf;
116 struct dqhdr64 dqh;
117 struct group *grp;
118 struct stat st;
119 int qcmd, serrno;
120
121 if (strcmp(fs->fs_vfstype, "ufs"))
122 return (NULL);
123 if ((qf = calloc(1, sizeof(*qf))) == NULL)
124 return (NULL);
125 qf->fd = -1;
126 qf->quotatype = quotatype;
127 strncpy(qf->fsname, fs->fs_file, sizeof(qf->fsname));
128 if (stat(qf->fsname, &st) != 0)
129 goto error;
130 qf->dev = st.st_dev;
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)
134 return (qf);
135 if (serrno == 0) {
136 errno = EOPNOTSUPP;
137 goto error;
138 }
139 qf->accmode = openflags & O_ACCMODE;
|
140 if ((qf->fd = open(qf->qfname, qf->accmode)) < 0 &&
| 140 if ((qf->fd = open(qf->qfname, qf->accmode|O_CLOEXEC)) < 0 &&
|
141 (openflags & O_CREAT) != O_CREAT)
142 goto error;
143 /* File open worked, so process it */
144 if (qf->fd != -1) {
145 qf->wordsize = 32;
146 switch (read(qf->fd, &dqh, sizeof(dqh))) {
147 case -1:
148 goto error;
149 case sizeof(dqh):
150 if (strcmp(dqh.dqh_magic, Q_DQHDR64_MAGIC) != 0) {
151 /* no magic, assume 32 bits */
152 qf->wordsize = 32;
153 return (qf);
154 }
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 */
159 errno = EINVAL;
160 goto error;
161 }
162 qf->wordsize = 64;
163 return (qf);
164 default:
165 qf->wordsize = 32;
166 return (qf);
167 }
168 /* not reached */
169 }
170 /* open failed, but O_CREAT was specified, so create a new file */
| 141 (openflags & O_CREAT) != O_CREAT)
142 goto error;
143 /* File open worked, so process it */
144 if (qf->fd != -1) {
145 qf->wordsize = 32;
146 switch (read(qf->fd, &dqh, sizeof(dqh))) {
147 case -1:
148 goto error;
149 case sizeof(dqh):
150 if (strcmp(dqh.dqh_magic, Q_DQHDR64_MAGIC) != 0) {
151 /* no magic, assume 32 bits */
152 qf->wordsize = 32;
153 return (qf);
154 }
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 */
159 errno = EINVAL;
160 goto error;
161 }
162 qf->wordsize = 64;
163 return (qf);
164 default:
165 qf->wordsize = 32;
166 return (qf);
167 }
168 /* not reached */
169 }
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, 0)) < 0)
| 171 if ((qf->fd = open(qf->qfname, O_RDWR|O_CREAT|O_TRUNC|O_CLOEXEC, 0)) <
172 0)
|
172 goto error;
173 qf->wordsize = 64;
174 memset(&dqh, 0, sizeof(dqh));
175 memcpy(dqh.dqh_magic, Q_DQHDR64_MAGIC, sizeof(dqh.dqh_magic));
176 dqh.dqh_version = htobe32(Q_DQHDR64_VERSION);
177 dqh.dqh_hdrlen = htobe32(sizeof(struct dqhdr64));
178 dqh.dqh_reclen = htobe32(sizeof(struct dqblk64));
179 if (write(qf->fd, &dqh, sizeof(dqh)) != sizeof(dqh)) {
180 /* it was one we created ourselves */
181 unlink(qf->qfname);
182 goto error;
183 }
184 grp = getgrnam(QUOTAGROUP);
185 fchown(qf->fd, 0, grp ? grp->gr_gid : 0);
186 fchmod(qf->fd, 0640);
187 return (qf);
188error:
189 serrno = errno;
190 /* did we have an open file? */
191 if (qf->fd != -1)
192 close(qf->fd);
193 free(qf);
194 errno = serrno;
195 return (NULL);
196}
197
198void
199quota_close(struct quotafile *qf)
200{
201
202 if (qf->fd != -1)
203 close(qf->fd);
204 free(qf);
205}
206
207int
208quota_on(struct quotafile *qf)
209{
210 int qcmd;
211
212 qcmd = QCMD(Q_QUOTAON, qf->quotatype);
213 return (quotactl(qf->fsname, qcmd, 0, qf->qfname));
214}
215
216int
217quota_off(struct quotafile *qf)
218{
219
220 return (quotactl(qf->fsname, QCMD(Q_QUOTAOFF, qf->quotatype), 0, 0));
221}
222
223const char *
224quota_fsname(const struct quotafile *qf)
225{
226
227 return (qf->fsname);
228}
229
230const char *
231quota_qfname(const struct quotafile *qf)
232{
233
234 return (qf->qfname);
235}
236
237int
238quota_check_path(const struct quotafile *qf, const char *path)
239{
240 struct stat st;
241
242 if (stat(path, &st) == -1)
243 return (-1);
244 return (st.st_dev == qf->dev);
245}
246
247int
248quota_maxid(struct quotafile *qf)
249{
250 struct stat st;
251 int maxid;
252
253 if (stat(qf->qfname, &st) < 0)
254 return (0);
255 switch (qf->wordsize) {
256 case 32:
257 maxid = st.st_size / sizeof(struct dqblk32) - 1;
258 break;
259 case 64:
260 maxid = st.st_size / sizeof(struct dqblk64) - 2;
261 break;
262 default:
263 maxid = 0;
264 break;
265 }
266 return (maxid > 0 ? maxid : 0);
267}
268
269static int
270quota_read32(struct quotafile *qf, struct dqblk *dqb, int id)
271{
272 struct dqblk32 dqb32;
273 off_t off;
274
275 off = id * sizeof(struct dqblk32);
276 if (lseek(qf->fd, off, SEEK_SET) == -1)
277 return (-1);
278 switch (read(qf->fd, &dqb32, sizeof(dqb32))) {
279 case 0:
280 memset(dqb, 0, sizeof(*dqb));
281 return (0);
282 case sizeof(dqb32):
283 dqb->dqb_bhardlimit = dqb32.dqb_bhardlimit;
284 dqb->dqb_bsoftlimit = dqb32.dqb_bsoftlimit;
285 dqb->dqb_curblocks = dqb32.dqb_curblocks;
286 dqb->dqb_ihardlimit = dqb32.dqb_ihardlimit;
287 dqb->dqb_isoftlimit = dqb32.dqb_isoftlimit;
288 dqb->dqb_curinodes = dqb32.dqb_curinodes;
289 dqb->dqb_btime = dqb32.dqb_btime;
290 dqb->dqb_itime = dqb32.dqb_itime;
291 return (0);
292 default:
293 return (-1);
294 }
295}
296
297static int
298quota_read64(struct quotafile *qf, struct dqblk *dqb, int id)
299{
300 struct dqblk64 dqb64;
301 off_t off;
302
303 off = sizeof(struct dqhdr64) + id * sizeof(struct dqblk64);
304 if (lseek(qf->fd, off, SEEK_SET) == -1)
305 return (-1);
306 switch (read(qf->fd, &dqb64, sizeof(dqb64))) {
307 case 0:
308 memset(dqb, 0, sizeof(*dqb));
309 return (0);
310 case sizeof(dqb64):
311 dqb->dqb_bhardlimit = be64toh(dqb64.dqb_bhardlimit);
312 dqb->dqb_bsoftlimit = be64toh(dqb64.dqb_bsoftlimit);
313 dqb->dqb_curblocks = be64toh(dqb64.dqb_curblocks);
314 dqb->dqb_ihardlimit = be64toh(dqb64.dqb_ihardlimit);
315 dqb->dqb_isoftlimit = be64toh(dqb64.dqb_isoftlimit);
316 dqb->dqb_curinodes = be64toh(dqb64.dqb_curinodes);
317 dqb->dqb_btime = be64toh(dqb64.dqb_btime);
318 dqb->dqb_itime = be64toh(dqb64.dqb_itime);
319 return (0);
320 default:
321 return (-1);
322 }
323}
324
325int
326quota_read(struct quotafile *qf, struct dqblk *dqb, int id)
327{
328 int qcmd;
329
330 if (qf->fd == -1) {
331 qcmd = QCMD(Q_GETQUOTA, qf->quotatype);
332 return (quotactl(qf->fsname, qcmd, id, dqb));
333 }
334 switch (qf->wordsize) {
335 case 32:
336 return (quota_read32(qf, dqb, id));
337 case 64:
338 return (quota_read64(qf, dqb, id));
339 default:
340 errno = EINVAL;
341 return (-1);
342 }
343 /* not reached */
344}
345
346#define CLIP32(u64) ((u64) > UINT32_MAX ? UINT32_MAX : (uint32_t)(u64))
347
348static int
349quota_write32(struct quotafile *qf, const struct dqblk *dqb, int id)
350{
351 struct dqblk32 dqb32;
352 off_t off;
353
354 dqb32.dqb_bhardlimit = CLIP32(dqb->dqb_bhardlimit);
355 dqb32.dqb_bsoftlimit = CLIP32(dqb->dqb_bsoftlimit);
356 dqb32.dqb_curblocks = CLIP32(dqb->dqb_curblocks);
357 dqb32.dqb_ihardlimit = CLIP32(dqb->dqb_ihardlimit);
358 dqb32.dqb_isoftlimit = CLIP32(dqb->dqb_isoftlimit);
359 dqb32.dqb_curinodes = CLIP32(dqb->dqb_curinodes);
360 dqb32.dqb_btime = CLIP32(dqb->dqb_btime);
361 dqb32.dqb_itime = CLIP32(dqb->dqb_itime);
362
363 off = id * sizeof(struct dqblk32);
364 if (lseek(qf->fd, off, SEEK_SET) == -1)
365 return (-1);
366 if (write(qf->fd, &dqb32, sizeof(dqb32)) == sizeof(dqb32))
367 return (0);
368 return (-1);
369}
370
371static int
372quota_write64(struct quotafile *qf, const struct dqblk *dqb, int id)
373{
374 struct dqblk64 dqb64;
375 off_t off;
376
377 dqb64.dqb_bhardlimit = htobe64(dqb->dqb_bhardlimit);
378 dqb64.dqb_bsoftlimit = htobe64(dqb->dqb_bsoftlimit);
379 dqb64.dqb_curblocks = htobe64(dqb->dqb_curblocks);
380 dqb64.dqb_ihardlimit = htobe64(dqb->dqb_ihardlimit);
381 dqb64.dqb_isoftlimit = htobe64(dqb->dqb_isoftlimit);
382 dqb64.dqb_curinodes = htobe64(dqb->dqb_curinodes);
383 dqb64.dqb_btime = htobe64(dqb->dqb_btime);
384 dqb64.dqb_itime = htobe64(dqb->dqb_itime);
385
386 off = sizeof(struct dqhdr64) + id * sizeof(struct dqblk64);
387 if (lseek(qf->fd, off, SEEK_SET) == -1)
388 return (-1);
389 if (write(qf->fd, &dqb64, sizeof(dqb64)) == sizeof(dqb64))
390 return (0);
391 return (-1);
392}
393
394int
395quota_write_usage(struct quotafile *qf, struct dqblk *dqb, int id)
396{
397 struct dqblk dqbuf;
398 int qcmd;
399
400 if (qf->fd == -1) {
401 qcmd = QCMD(Q_SETUSE, qf->quotatype);
402 return (quotactl(qf->fsname, qcmd, id, dqb));
403 }
404 /*
405 * Have to do read-modify-write of quota in file.
406 */
407 if ((qf->accmode & O_RDWR) != O_RDWR) {
408 errno = EBADF;
409 return (-1);
410 }
411 if (quota_read(qf, &dqbuf, id) != 0)
412 return (-1);
413 /*
414 * Reset time limit if have a soft limit and were
415 * previously under it, but are now over it.
416 */
417 if (dqbuf.dqb_bsoftlimit && id != 0 &&
418 dqbuf.dqb_curblocks < dqbuf.dqb_bsoftlimit &&
419 dqb->dqb_curblocks >= dqbuf.dqb_bsoftlimit)
420 dqbuf.dqb_btime = 0;
421 if (dqbuf.dqb_isoftlimit && id != 0 &&
422 dqbuf.dqb_curinodes < dqbuf.dqb_isoftlimit &&
423 dqb->dqb_curinodes >= dqbuf.dqb_isoftlimit)
424 dqbuf.dqb_itime = 0;
425 dqbuf.dqb_curinodes = dqb->dqb_curinodes;
426 dqbuf.dqb_curblocks = dqb->dqb_curblocks;
427 /*
428 * Write it back.
429 */
430 switch (qf->wordsize) {
431 case 32:
432 return (quota_write32(qf, &dqbuf, id));
433 case 64:
434 return (quota_write64(qf, &dqbuf, id));
435 default:
436 errno = EINVAL;
437 return (-1);
438 }
439 /* not reached */
440}
441
442int
443quota_write_limits(struct quotafile *qf, struct dqblk *dqb, int id)
444{
445 struct dqblk dqbuf;
446 int qcmd;
447
448 if (qf->fd == -1) {
449 qcmd = QCMD(Q_SETQUOTA, qf->quotatype);
450 return (quotactl(qf->fsname, qcmd, id, dqb));
451 }
452 /*
453 * Have to do read-modify-write of quota in file.
454 */
455 if ((qf->accmode & O_RDWR) != O_RDWR) {
456 errno = EBADF;
457 return (-1);
458 }
459 if (quota_read(qf, &dqbuf, id) != 0)
460 return (-1);
461 /*
462 * Reset time limit if have a soft limit and were
463 * previously under it, but are now over it
464 * or if there previously was no soft limit, but
465 * now have one and are over it.
466 */
467 if (dqbuf.dqb_bsoftlimit && id != 0 &&
468 dqbuf.dqb_curblocks < dqbuf.dqb_bsoftlimit &&
469 dqbuf.dqb_curblocks >= dqb->dqb_bsoftlimit)
470 dqb->dqb_btime = 0;
471 if (dqbuf.dqb_bsoftlimit == 0 && id != 0 &&
472 dqb->dqb_bsoftlimit > 0 &&
473 dqbuf.dqb_curblocks >= dqb->dqb_bsoftlimit)
474 dqb->dqb_btime = 0;
475 if (dqbuf.dqb_isoftlimit && id != 0 &&
476 dqbuf.dqb_curinodes < dqbuf.dqb_isoftlimit &&
477 dqbuf.dqb_curinodes >= dqb->dqb_isoftlimit)
478 dqb->dqb_itime = 0;
479 if (dqbuf.dqb_isoftlimit == 0 && id !=0 &&
480 dqb->dqb_isoftlimit > 0 &&
481 dqbuf.dqb_curinodes >= dqb->dqb_isoftlimit)
482 dqb->dqb_itime = 0;
483 dqb->dqb_curinodes = dqbuf.dqb_curinodes;
484 dqb->dqb_curblocks = dqbuf.dqb_curblocks;
485 /*
486 * Write it back.
487 */
488 switch (qf->wordsize) {
489 case 32:
490 return (quota_write32(qf, dqb, id));
491 case 64:
492 return (quota_write64(qf, dqb, id));
493 default:
494 errno = EINVAL;
495 return (-1);
496 }
497 /* not reached */
498}
499
500/*
501 * Convert a quota file from one format to another.
502 */
503int
504quota_convert(struct quotafile *qf, int wordsize)
505{
506 struct quotafile *newqf;
507 struct dqhdr64 dqh;
508 struct dqblk dqblk;
509 struct group *grp;
510 int serrno, maxid, id, fd;
511
512 /*
513 * Quotas must not be active and quotafile must be open
514 * for reading and writing.
515 */
516 if ((qf->accmode & O_RDWR) != O_RDWR || qf->fd == -1) {
517 errno = EBADF;
518 return (-1);
519 }
520 if ((wordsize != 32 && wordsize != 64) ||
521 wordsize == qf->wordsize) {
522 errno = EINVAL;
523 return (-1);
524 }
525 maxid = quota_maxid(qf);
526 if ((newqf = calloc(1, sizeof(*qf))) == NULL) {
527 errno = ENOMEM;
528 return (-1);
529 }
530 *newqf = *qf;
531 snprintf(newqf->qfname, MAXPATHLEN + 1, "%s_%d.orig", qf->qfname,
532 qf->wordsize);
533 if (rename(qf->qfname, newqf->qfname) < 0) {
534 free(newqf);
535 return (-1);
536 }
| 173 goto error;
174 qf->wordsize = 64;
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 */
182 unlink(qf->qfname);
183 goto error;
184 }
185 grp = getgrnam(QUOTAGROUP);
186 fchown(qf->fd, 0, grp ? grp->gr_gid : 0);
187 fchmod(qf->fd, 0640);
188 return (qf);
189error:
190 serrno = errno;
191 /* did we have an open file? */
192 if (qf->fd != -1)
193 close(qf->fd);
194 free(qf);
195 errno = serrno;
196 return (NULL);
197}
198
199void
200quota_close(struct quotafile *qf)
201{
202
203 if (qf->fd != -1)
204 close(qf->fd);
205 free(qf);
206}
207
208int
209quota_on(struct quotafile *qf)
210{
211 int qcmd;
212
213 qcmd = QCMD(Q_QUOTAON, qf->quotatype);
214 return (quotactl(qf->fsname, qcmd, 0, qf->qfname));
215}
216
217int
218quota_off(struct quotafile *qf)
219{
220
221 return (quotactl(qf->fsname, QCMD(Q_QUOTAOFF, qf->quotatype), 0, 0));
222}
223
224const char *
225quota_fsname(const struct quotafile *qf)
226{
227
228 return (qf->fsname);
229}
230
231const char *
232quota_qfname(const struct quotafile *qf)
233{
234
235 return (qf->qfname);
236}
237
238int
239quota_check_path(const struct quotafile *qf, const char *path)
240{
241 struct stat st;
242
243 if (stat(path, &st) == -1)
244 return (-1);
245 return (st.st_dev == qf->dev);
246}
247
248int
249quota_maxid(struct quotafile *qf)
250{
251 struct stat st;
252 int maxid;
253
254 if (stat(qf->qfname, &st) < 0)
255 return (0);
256 switch (qf->wordsize) {
257 case 32:
258 maxid = st.st_size / sizeof(struct dqblk32) - 1;
259 break;
260 case 64:
261 maxid = st.st_size / sizeof(struct dqblk64) - 2;
262 break;
263 default:
264 maxid = 0;
265 break;
266 }
267 return (maxid > 0 ? maxid : 0);
268}
269
270static int
271quota_read32(struct quotafile *qf, struct dqblk *dqb, int id)
272{
273 struct dqblk32 dqb32;
274 off_t off;
275
276 off = id * sizeof(struct dqblk32);
277 if (lseek(qf->fd, off, SEEK_SET) == -1)
278 return (-1);
279 switch (read(qf->fd, &dqb32, sizeof(dqb32))) {
280 case 0:
281 memset(dqb, 0, sizeof(*dqb));
282 return (0);
283 case sizeof(dqb32):
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;
292 return (0);
293 default:
294 return (-1);
295 }
296}
297
298static int
299quota_read64(struct quotafile *qf, struct dqblk *dqb, int id)
300{
301 struct dqblk64 dqb64;
302 off_t off;
303
304 off = sizeof(struct dqhdr64) + id * sizeof(struct dqblk64);
305 if (lseek(qf->fd, off, SEEK_SET) == -1)
306 return (-1);
307 switch (read(qf->fd, &dqb64, sizeof(dqb64))) {
308 case 0:
309 memset(dqb, 0, sizeof(*dqb));
310 return (0);
311 case sizeof(dqb64):
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);
320 return (0);
321 default:
322 return (-1);
323 }
324}
325
326int
327quota_read(struct quotafile *qf, struct dqblk *dqb, int id)
328{
329 int qcmd;
330
331 if (qf->fd == -1) {
332 qcmd = QCMD(Q_GETQUOTA, qf->quotatype);
333 return (quotactl(qf->fsname, qcmd, id, dqb));
334 }
335 switch (qf->wordsize) {
336 case 32:
337 return (quota_read32(qf, dqb, id));
338 case 64:
339 return (quota_read64(qf, dqb, id));
340 default:
341 errno = EINVAL;
342 return (-1);
343 }
344 /* not reached */
345}
346
347#define CLIP32(u64) ((u64) > UINT32_MAX ? UINT32_MAX : (uint32_t)(u64))
348
349static int
350quota_write32(struct quotafile *qf, const struct dqblk *dqb, int id)
351{
352 struct dqblk32 dqb32;
353 off_t off;
354
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);
363
364 off = id * sizeof(struct dqblk32);
365 if (lseek(qf->fd, off, SEEK_SET) == -1)
366 return (-1);
367 if (write(qf->fd, &dqb32, sizeof(dqb32)) == sizeof(dqb32))
368 return (0);
369 return (-1);
370}
371
372static int
373quota_write64(struct quotafile *qf, const struct dqblk *dqb, int id)
374{
375 struct dqblk64 dqb64;
376 off_t off;
377
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);
386
387 off = sizeof(struct dqhdr64) + id * sizeof(struct dqblk64);
388 if (lseek(qf->fd, off, SEEK_SET) == -1)
389 return (-1);
390 if (write(qf->fd, &dqb64, sizeof(dqb64)) == sizeof(dqb64))
391 return (0);
392 return (-1);
393}
394
395int
396quota_write_usage(struct quotafile *qf, struct dqblk *dqb, int id)
397{
398 struct dqblk dqbuf;
399 int qcmd;
400
401 if (qf->fd == -1) {
402 qcmd = QCMD(Q_SETUSE, qf->quotatype);
403 return (quotactl(qf->fsname, qcmd, id, dqb));
404 }
405 /*
406 * Have to do read-modify-write of quota in file.
407 */
408 if ((qf->accmode & O_RDWR) != O_RDWR) {
409 errno = EBADF;
410 return (-1);
411 }
412 if (quota_read(qf, &dqbuf, id) != 0)
413 return (-1);
414 /*
415 * Reset time limit if have a soft limit and were
416 * previously under it, but are now over it.
417 */
418 if (dqbuf.dqb_bsoftlimit && id != 0 &&
419 dqbuf.dqb_curblocks < dqbuf.dqb_bsoftlimit &&
420 dqb->dqb_curblocks >= dqbuf.dqb_bsoftlimit)
421 dqbuf.dqb_btime = 0;
422 if (dqbuf.dqb_isoftlimit && id != 0 &&
423 dqbuf.dqb_curinodes < dqbuf.dqb_isoftlimit &&
424 dqb->dqb_curinodes >= dqbuf.dqb_isoftlimit)
425 dqbuf.dqb_itime = 0;
426 dqbuf.dqb_curinodes = dqb->dqb_curinodes;
427 dqbuf.dqb_curblocks = dqb->dqb_curblocks;
428 /*
429 * Write it back.
430 */
431 switch (qf->wordsize) {
432 case 32:
433 return (quota_write32(qf, &dqbuf, id));
434 case 64:
435 return (quota_write64(qf, &dqbuf, id));
436 default:
437 errno = EINVAL;
438 return (-1);
439 }
440 /* not reached */
441}
442
443int
444quota_write_limits(struct quotafile *qf, struct dqblk *dqb, int id)
445{
446 struct dqblk dqbuf;
447 int qcmd;
448
449 if (qf->fd == -1) {
450 qcmd = QCMD(Q_SETQUOTA, qf->quotatype);
451 return (quotactl(qf->fsname, qcmd, id, dqb));
452 }
453 /*
454 * Have to do read-modify-write of quota in file.
455 */
456 if ((qf->accmode & O_RDWR) != O_RDWR) {
457 errno = EBADF;
458 return (-1);
459 }
460 if (quota_read(qf, &dqbuf, id) != 0)
461 return (-1);
462 /*
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.
467 */
468 if (dqbuf.dqb_bsoftlimit && id != 0 &&
469 dqbuf.dqb_curblocks < dqbuf.dqb_bsoftlimit &&
470 dqbuf.dqb_curblocks >= dqb->dqb_bsoftlimit)
471 dqb->dqb_btime = 0;
472 if (dqbuf.dqb_bsoftlimit == 0 && id != 0 &&
473 dqb->dqb_bsoftlimit > 0 &&
474 dqbuf.dqb_curblocks >= dqb->dqb_bsoftlimit)
475 dqb->dqb_btime = 0;
476 if (dqbuf.dqb_isoftlimit && id != 0 &&
477 dqbuf.dqb_curinodes < dqbuf.dqb_isoftlimit &&
478 dqbuf.dqb_curinodes >= dqb->dqb_isoftlimit)
479 dqb->dqb_itime = 0;
480 if (dqbuf.dqb_isoftlimit == 0 && id !=0 &&
481 dqb->dqb_isoftlimit > 0 &&
482 dqbuf.dqb_curinodes >= dqb->dqb_isoftlimit)
483 dqb->dqb_itime = 0;
484 dqb->dqb_curinodes = dqbuf.dqb_curinodes;
485 dqb->dqb_curblocks = dqbuf.dqb_curblocks;
486 /*
487 * Write it back.
488 */
489 switch (qf->wordsize) {
490 case 32:
491 return (quota_write32(qf, dqb, id));
492 case 64:
493 return (quota_write64(qf, dqb, id));
494 default:
495 errno = EINVAL;
496 return (-1);
497 }
498 /* not reached */
499}
500
501/*
502 * Convert a quota file from one format to another.
503 */
504int
505quota_convert(struct quotafile *qf, int wordsize)
506{
507 struct quotafile *newqf;
508 struct dqhdr64 dqh;
509 struct dqblk dqblk;
510 struct group *grp;
511 int serrno, maxid, id, fd;
512
513 /*
514 * Quotas must not be active and quotafile must be open
515 * for reading and writing.
516 */
517 if ((qf->accmode & O_RDWR) != O_RDWR || qf->fd == -1) {
518 errno = EBADF;
519 return (-1);
520 }
521 if ((wordsize != 32 && wordsize != 64) ||
522 wordsize == qf->wordsize) {
523 errno = EINVAL;
524 return (-1);
525 }
526 maxid = quota_maxid(qf);
527 if ((newqf = calloc(1, sizeof(*qf))) == NULL) {
528 errno = ENOMEM;
529 return (-1);
530 }
531 *newqf = *qf;
532 snprintf(newqf->qfname, MAXPATHLEN + 1, "%s_%d.orig", qf->qfname,
533 qf->wordsize);
534 if (rename(qf->qfname, newqf->qfname) < 0) {
535 free(newqf);
536 return (-1);
537 }
|
537 if ((newqf->fd = open(qf->qfname, O_RDWR|O_CREAT|O_TRUNC, 0)) < 0) {
| 538 if ((newqf->fd = open(qf->qfname, O_RDWR|O_CREAT|O_TRUNC|O_CLOEXEC,
539 0)) < 0) {
|
538 serrno = errno;
539 goto error;
540 }
541 newqf->wordsize = wordsize;
542 if (wordsize == 64) {
543 memset(&dqh, 0, sizeof(dqh));
544 memcpy(dqh.dqh_magic, Q_DQHDR64_MAGIC, sizeof(dqh.dqh_magic));
545 dqh.dqh_version = htobe32(Q_DQHDR64_VERSION);
546 dqh.dqh_hdrlen = htobe32(sizeof(struct dqhdr64));
547 dqh.dqh_reclen = htobe32(sizeof(struct dqblk64));
548 if (write(newqf->fd, &dqh, sizeof(dqh)) != sizeof(dqh)) {
549 serrno = errno;
550 goto error;
551 }
552 }
553 grp = getgrnam(QUOTAGROUP);
554 fchown(newqf->fd, 0, grp ? grp->gr_gid : 0);
555 fchmod(newqf->fd, 0640);
556 for (id = 0; id <= maxid; id++) {
557 if ((quota_read(qf, &dqblk, id)) < 0)
558 break;
559 switch (newqf->wordsize) {
560 case 32:
561 if ((quota_write32(newqf, &dqblk, id)) < 0)
562 break;
563 continue;
564 case 64:
565 if ((quota_write64(newqf, &dqblk, id)) < 0)
566 break;
567 continue;
568 default:
569 errno = EINVAL;
570 break;
571 }
572 }
573 if (id < maxid) {
574 serrno = errno;
575 goto error;
576 }
577 /*
578 * Update the passed in quotafile to reference the new file
579 * of the converted format size.
580 */
581 fd = qf->fd;
582 qf->fd = newqf->fd;
583 newqf->fd = fd;
584 qf->wordsize = newqf->wordsize;
585 quota_close(newqf);
586 return (0);
587error:
588 /* put back the original file */
589 (void) rename(newqf->qfname, qf->qfname);
590 quota_close(newqf);
591 errno = serrno;
592 return (-1);
593}
| 540 serrno = errno;
541 goto error;
542 }
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)) {
551 serrno = errno;
552 goto error;
553 }
554 }
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)
560 break;
561 switch (newqf->wordsize) {
562 case 32:
563 if ((quota_write32(newqf, &dqblk, id)) < 0)
564 break;
565 continue;
566 case 64:
567 if ((quota_write64(newqf, &dqblk, id)) < 0)
568 break;
569 continue;
570 default:
571 errno = EINVAL;
572 break;
573 }
574 }
575 if (id < maxid) {
576 serrno = errno;
577 goto error;
578 }
579 /*
580 * Update the passed in quotafile to reference the new file
581 * of the converted format size.
582 */
583 fd = qf->fd;
584 qf->fd = newqf->fd;
585 newqf->fd = fd;
586 qf->wordsize = newqf->wordsize;
587 quota_close(newqf);
588 return (0);
589error:
590 /* put back the original file */
591 (void) rename(newqf->qfname, qf->qfname);
592 quota_close(newqf);
593 errno = serrno;
594 return (-1);
595}
|