1 /*
2 * mkquota.c --- create quota files for a filesystem
3 *
4 * Aditya Kali <adityakali@google.com>
5 */
6 #include "config.h"
7 #include <sys/types.h>
8 #include <sys/stat.h>
9 #include <unistd.h>
10 #include <errno.h>
11 #include <string.h>
12 #include <fcntl.h>
13
14 #include "ext2fs/ext2_fs.h"
15 #include "ext2fs/ext2fs.h"
16 #include "e2p/e2p.h"
17
18 #include "quotaio.h"
19 #include "quotaio_v2.h"
20 #include "quotaio_tree.h"
21 #include "common.h"
22 #include "dict.h"
23
24 /* Needed for architectures where sizeof(int) != sizeof(void *) */
25 #define UINT_TO_VOIDPTR(val) ((void *)(intptr_t)(val))
26 #define VOIDPTR_TO_UINT(ptr) ((unsigned int)(intptr_t)(ptr))
27
28 #if DEBUG_QUOTA
print_inode(struct ext2_inode * inode)29 static void print_inode(struct ext2_inode *inode)
30 {
31 if (!inode)
32 return;
33
34 fprintf(stderr, " i_mode = %d\n", inode->i_mode);
35 fprintf(stderr, " i_uid = %d\n", inode->i_uid);
36 fprintf(stderr, " i_size = %d\n", inode->i_size);
37 fprintf(stderr, " i_atime = %d\n", inode->i_atime);
38 fprintf(stderr, " i_ctime = %d\n", inode->i_ctime);
39 fprintf(stderr, " i_mtime = %d\n", inode->i_mtime);
40 fprintf(stderr, " i_dtime = %d\n", inode->i_dtime);
41 fprintf(stderr, " i_gid = %d\n", inode->i_gid);
42 fprintf(stderr, " i_links_count = %d\n", inode->i_links_count);
43 fprintf(stderr, " i_blocks = %d\n", inode->i_blocks);
44 fprintf(stderr, " i_flags = %d\n", inode->i_flags);
45
46 return;
47 }
48
print_dquot(const char * desc,struct dquot * dq)49 static void print_dquot(const char *desc, struct dquot *dq)
50 {
51 if (desc)
52 fprintf(stderr, "%s: ", desc);
53 fprintf(stderr, "%u %lld:%lld:%lld %lld:%lld:%lld\n",
54 dq->dq_id, dq->dq_dqb.dqb_curspace,
55 dq->dq_dqb.dqb_bsoftlimit, dq->dq_dqb.dqb_bhardlimit,
56 dq->dq_dqb.dqb_curinodes,
57 dq->dq_dqb.dqb_isoftlimit, dq->dq_dqb.dqb_ihardlimit);
58 }
59 #else
print_dquot(const char * desc EXT2FS_ATTR ((unused)),struct dquot * dq EXT2FS_ATTR ((unused)))60 static void print_dquot(const char *desc EXT2FS_ATTR((unused)),
61 struct dquot *dq EXT2FS_ATTR((unused)))
62 {
63 }
64 #endif
65
66 /*
67 * Returns 0 if not able to find the quota file, otherwise returns its
68 * inode number.
69 */
quota_file_exists(ext2_filsys fs,enum quota_type qtype)70 int quota_file_exists(ext2_filsys fs, enum quota_type qtype)
71 {
72 char qf_name[256];
73 errcode_t ret;
74 ext2_ino_t ino;
75
76 if (qtype >= MAXQUOTAS)
77 return -EINVAL;
78
79 quota_get_qf_name(qtype, QFMT_VFS_V1, qf_name);
80
81 ret = ext2fs_lookup(fs, EXT2_ROOT_INO, qf_name, strlen(qf_name), 0,
82 &ino);
83 if (ret)
84 return 0;
85
86 return ino;
87 }
88
89 /*
90 * Set the value for reserved quota inode number field in superblock.
91 */
quota_set_sb_inum(ext2_filsys fs,ext2_ino_t ino,enum quota_type qtype)92 void quota_set_sb_inum(ext2_filsys fs, ext2_ino_t ino, enum quota_type qtype)
93 {
94 ext2_ino_t *inump;
95
96 inump = quota_sb_inump(fs->super, qtype);
97
98 log_debug("setting quota ino in superblock: ino=%u, type=%d", ino,
99 qtype);
100 *inump = ino;
101 ext2fs_mark_super_dirty(fs);
102 }
103
quota_remove_inode(ext2_filsys fs,enum quota_type qtype)104 errcode_t quota_remove_inode(ext2_filsys fs, enum quota_type qtype)
105 {
106 ext2_ino_t qf_ino;
107 errcode_t retval;
108
109 retval = ext2fs_read_bitmaps(fs);
110 if (retval) {
111 log_debug("Couldn't read bitmaps: %s", error_message(retval));
112 return retval;
113 }
114
115 qf_ino = *quota_sb_inump(fs->super, qtype);
116 if (qf_ino == 0)
117 return 0;
118 retval = quota_inode_truncate(fs, qf_ino);
119 if (retval)
120 return retval;
121 if (qf_ino >= EXT2_FIRST_INODE(fs->super)) {
122 struct ext2_inode inode;
123
124 retval = ext2fs_read_inode(fs, qf_ino, &inode);
125 if (!retval) {
126 memset(&inode, 0, sizeof(struct ext2_inode));
127 ext2fs_write_inode(fs, qf_ino, &inode);
128 }
129 ext2fs_inode_alloc_stats2(fs, qf_ino, -1, 0);
130 ext2fs_mark_ib_dirty(fs);
131
132 }
133 quota_set_sb_inum(fs, 0, qtype);
134
135 ext2fs_mark_super_dirty(fs);
136 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
137 retval = ext2fs_write_bitmaps(fs);
138 if (retval) {
139 log_debug("Couldn't write bitmaps: %s", error_message(retval));
140 return retval;
141 }
142 return 0;
143 }
144
write_dquots(dict_t * dict,struct quota_handle * qh)145 static void write_dquots(dict_t *dict, struct quota_handle *qh)
146 {
147 dnode_t *n;
148 struct dquot *dq;
149
150 for (n = dict_first(dict); n; n = dict_next(dict, n)) {
151 dq = dnode_get(n);
152 if (dq) {
153 print_dquot("write", dq);
154 dq->dq_h = qh;
155 update_grace_times(dq);
156 qh->qh_ops->commit_dquot(dq);
157 }
158 }
159 }
160
quota_write_inode(quota_ctx_t qctx,unsigned int qtype_bits)161 errcode_t quota_write_inode(quota_ctx_t qctx, unsigned int qtype_bits)
162 {
163 int retval = 0;
164 enum quota_type qtype;
165 dict_t *dict;
166 ext2_filsys fs;
167 struct quota_handle *h = NULL;
168 int fmt = QFMT_VFS_V1;
169
170 if (!qctx)
171 return 0;
172
173 fs = qctx->fs;
174 retval = ext2fs_get_mem(sizeof(struct quota_handle), &h);
175 if (retval) {
176 log_debug("Unable to allocate quota handle: %s",
177 error_message(retval));
178 goto out;
179 }
180
181 retval = ext2fs_read_bitmaps(fs);
182 if (retval) {
183 log_debug("Couldn't read bitmaps: %s", error_message(retval));
184 goto out;
185 }
186
187 for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
188 if (((1 << qtype) & qtype_bits) == 0)
189 continue;
190
191 dict = qctx->quota_dict[qtype];
192 if (!dict)
193 continue;
194
195 retval = quota_file_create(h, fs, qtype, fmt);
196 if (retval < 0) {
197 log_debug("Cannot initialize io on quotafile");
198 continue;
199 }
200
201 write_dquots(dict, h);
202 retval = quota_file_close(qctx, h);
203 if (retval < 0) {
204 log_err("Cannot finish IO on new quotafile: %s",
205 strerror(errno));
206 if (h->qh_qf.e2_file)
207 ext2fs_file_close(h->qh_qf.e2_file);
208 (void) quota_inode_truncate(fs, h->qh_qf.ino);
209 continue;
210 }
211
212 /* Set quota inode numbers in superblock. */
213 quota_set_sb_inum(fs, h->qh_qf.ino, qtype);
214 ext2fs_mark_super_dirty(fs);
215 ext2fs_mark_bb_dirty(fs);
216 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
217 }
218
219 retval = ext2fs_write_bitmaps(fs);
220 if (retval) {
221 log_debug("Couldn't write bitmaps: %s", error_message(retval));
222 goto out;
223 }
224 out:
225 if (h)
226 ext2fs_free_mem(&h);
227 return retval;
228 }
229
230 /******************************************************************/
231 /* Helper functions for computing quota in memory. */
232 /******************************************************************/
233
dict_uint_cmp(const void * a,const void * b)234 static int dict_uint_cmp(const void *a, const void *b)
235 {
236 unsigned int c, d;
237
238 c = VOIDPTR_TO_UINT(a);
239 d = VOIDPTR_TO_UINT(b);
240
241 if (c == d)
242 return 0;
243 else if (c > d)
244 return 1;
245 else
246 return -1;
247 }
248
get_qid(struct ext2_inode_large * inode,enum quota_type qtype)249 static inline qid_t get_qid(struct ext2_inode_large *inode, enum quota_type qtype)
250 {
251 unsigned int inode_size;
252
253 switch (qtype) {
254 case USRQUOTA:
255 return inode_uid(*inode);
256 case GRPQUOTA:
257 return inode_gid(*inode);
258 case PRJQUOTA:
259 inode_size = EXT2_GOOD_OLD_INODE_SIZE +
260 inode->i_extra_isize;
261 if (inode_includes(inode_size, i_projid))
262 return inode_projid(*inode);
263 default:
264 return 0;
265 }
266
267 return 0;
268 }
269
quota_dnode_free(dnode_t * node,void * context EXT2FS_ATTR ((unused)))270 static void quota_dnode_free(dnode_t *node,
271 void *context EXT2FS_ATTR((unused)))
272 {
273 void *ptr = node ? dnode_get(node) : 0;
274
275 ext2fs_free_mem(&ptr);
276 free(node);
277 }
278
279 /*
280 * Set up the quota tracking data structures.
281 */
quota_init_context(quota_ctx_t * qctx,ext2_filsys fs,unsigned int qtype_bits)282 errcode_t quota_init_context(quota_ctx_t *qctx, ext2_filsys fs,
283 unsigned int qtype_bits)
284 {
285 errcode_t err;
286 dict_t *dict;
287 quota_ctx_t ctx;
288 enum quota_type qtype;
289
290 err = ext2fs_get_mem(sizeof(struct quota_ctx), &ctx);
291 if (err) {
292 log_debug("Failed to allocate quota context");
293 return err;
294 }
295
296 memset(ctx, 0, sizeof(struct quota_ctx));
297 for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
298 ctx->quota_file[qtype] = NULL;
299 if (((1 << qtype) & qtype_bits) == 0)
300 continue;
301 err = ext2fs_get_mem(sizeof(dict_t), &dict);
302 if (err) {
303 log_debug("Failed to allocate dictionary");
304 quota_release_context(&ctx);
305 return err;
306 }
307 ctx->quota_dict[qtype] = dict;
308 dict_init(dict, DICTCOUNT_T_MAX, dict_uint_cmp);
309 dict_set_allocator(dict, NULL, quota_dnode_free, NULL);
310 }
311
312 ctx->fs = fs;
313 *qctx = ctx;
314 return 0;
315 }
316
quota_release_context(quota_ctx_t * qctx)317 void quota_release_context(quota_ctx_t *qctx)
318 {
319 errcode_t err;
320 dict_t *dict;
321 enum quota_type qtype;
322 quota_ctx_t ctx;
323
324 if (!qctx)
325 return;
326
327 ctx = *qctx;
328 for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
329 dict = ctx->quota_dict[qtype];
330 ctx->quota_dict[qtype] = 0;
331 if (dict) {
332 dict_free_nodes(dict);
333 free(dict);
334 }
335 if (ctx->quota_file[qtype]) {
336 err = quota_file_close(ctx, ctx->quota_file[qtype]);
337 if (err) {
338 log_err("Cannot close quotafile: %s",
339 strerror(errno));
340 ext2fs_free_mem(&ctx->quota_file[qtype]);
341 }
342 }
343 }
344 *qctx = NULL;
345 free(ctx);
346 }
347
get_dq(dict_t * dict,__u32 key)348 static struct dquot *get_dq(dict_t *dict, __u32 key)
349 {
350 struct dquot *dq;
351 dnode_t *n;
352
353 n = dict_lookup(dict, UINT_TO_VOIDPTR(key));
354 if (n)
355 dq = dnode_get(n);
356 else {
357 if (ext2fs_get_mem(sizeof(struct dquot), &dq)) {
358 log_err("Unable to allocate dquot");
359 return NULL;
360 }
361 memset(dq, 0, sizeof(struct dquot));
362 dict_alloc_insert(dict, UINT_TO_VOIDPTR(key), dq);
363 dq->dq_id = key;
364 }
365 return dq;
366 }
367
368
369 /*
370 * Called to update the blocks used by a particular inode
371 */
quota_data_add(quota_ctx_t qctx,struct ext2_inode_large * inode,ext2_ino_t ino EXT2FS_ATTR ((unused)),qsize_t space)372 void quota_data_add(quota_ctx_t qctx, struct ext2_inode_large *inode,
373 ext2_ino_t ino EXT2FS_ATTR((unused)),
374 qsize_t space)
375 {
376 struct dquot *dq;
377 dict_t *dict;
378 enum quota_type qtype;
379
380 if (!qctx)
381 return;
382
383 log_debug("ADD_DATA: Inode: %u, UID/GID: %u/%u, space: %ld", ino,
384 inode_uid(*inode),
385 inode_gid(*inode), space);
386 for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
387 dict = qctx->quota_dict[qtype];
388 if (dict) {
389 dq = get_dq(dict, get_qid(inode, qtype));
390 if (dq)
391 dq->dq_dqb.dqb_curspace += space;
392 }
393 }
394 }
395
396 /*
397 * Called to remove some blocks used by a particular inode
398 */
quota_data_sub(quota_ctx_t qctx,struct ext2_inode_large * inode,ext2_ino_t ino EXT2FS_ATTR ((unused)),qsize_t space)399 void quota_data_sub(quota_ctx_t qctx, struct ext2_inode_large *inode,
400 ext2_ino_t ino EXT2FS_ATTR((unused)),
401 qsize_t space)
402 {
403 struct dquot *dq;
404 dict_t *dict;
405 enum quota_type qtype;
406
407 if (!qctx)
408 return;
409
410 log_debug("SUB_DATA: Inode: %u, UID/GID: %u/%u, space: %ld", ino,
411 inode_uid(*inode),
412 inode_gid(*inode), space);
413 for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
414 dict = qctx->quota_dict[qtype];
415 if (dict) {
416 dq = get_dq(dict, get_qid(inode, qtype));
417 dq->dq_dqb.dqb_curspace -= space;
418 }
419 }
420 }
421
422 /*
423 * Called to count the files used by an inode's user/group
424 */
quota_data_inodes(quota_ctx_t qctx,struct ext2_inode_large * inode,ext2_ino_t ino EXT2FS_ATTR ((unused)),int adjust)425 void quota_data_inodes(quota_ctx_t qctx, struct ext2_inode_large *inode,
426 ext2_ino_t ino EXT2FS_ATTR((unused)), int adjust)
427 {
428 struct dquot *dq;
429 dict_t *dict;
430 enum quota_type qtype;
431
432 if (!qctx)
433 return;
434
435 log_debug("ADJ_INODE: Inode: %u, UID/GID: %u/%u, adjust: %d", ino,
436 inode_uid(*inode),
437 inode_gid(*inode), adjust);
438 for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
439 dict = qctx->quota_dict[qtype];
440 if (dict) {
441 dq = get_dq(dict, get_qid(inode, qtype));
442 dq->dq_dqb.dqb_curinodes += adjust;
443 }
444 }
445 }
446
quota_compute_usage(quota_ctx_t qctx)447 errcode_t quota_compute_usage(quota_ctx_t qctx)
448 {
449 ext2_filsys fs;
450 ext2_ino_t ino;
451 errcode_t ret;
452 struct ext2_inode_large *inode;
453 int inode_size;
454 qsize_t space;
455 ext2_inode_scan scan;
456
457 if (!qctx)
458 return 0;
459
460 fs = qctx->fs;
461 ret = ext2fs_open_inode_scan(fs, 0, &scan);
462 if (ret) {
463 log_err("while opening inode scan. ret=%ld", ret);
464 return ret;
465 }
466 inode_size = fs->super->s_inode_size;
467 inode = malloc(inode_size);
468 if (!inode)
469 return ENOMEM;
470 while (1) {
471 ret = ext2fs_get_next_inode_full(scan, &ino,
472 EXT2_INODE(inode), inode_size);
473 if (ret) {
474 log_err("while getting next inode. ret=%ld", ret);
475 ext2fs_close_inode_scan(scan);
476 free(inode);
477 return ret;
478 }
479 if (ino == 0)
480 break;
481 if (inode->i_links_count &&
482 (ino == EXT2_ROOT_INO ||
483 ino >= EXT2_FIRST_INODE(fs->super))) {
484 space = ext2fs_inode_i_blocks(fs,
485 EXT2_INODE(inode)) << 9;
486 quota_data_add(qctx, inode, ino, space);
487 quota_data_inodes(qctx, inode, ino, +1);
488 }
489 }
490
491 ext2fs_close_inode_scan(scan);
492 free(inode);
493 return 0;
494 }
495
496 struct scan_dquots_data {
497 dict_t *quota_dict;
498 int update_limits; /* update limits from disk */
499 int update_usage;
500 int usage_is_inconsistent;
501 };
502
scan_dquots_callback(struct dquot * dquot,void * cb_data)503 static int scan_dquots_callback(struct dquot *dquot, void *cb_data)
504 {
505 struct scan_dquots_data *scan_data = cb_data;
506 dict_t *quota_dict = scan_data->quota_dict;
507 struct dquot *dq;
508
509 dq = get_dq(quota_dict, dquot->dq_id);
510 dq->dq_id = dquot->dq_id;
511 dq->dq_flags |= DQF_SEEN;
512
513 print_dquot("mem", dq);
514 print_dquot("dsk", dquot);
515
516 /* Check if there is inconsistancy. */
517 if (dq->dq_dqb.dqb_curspace != dquot->dq_dqb.dqb_curspace ||
518 dq->dq_dqb.dqb_curinodes != dquot->dq_dqb.dqb_curinodes) {
519 scan_data->usage_is_inconsistent = 1;
520 fprintf(stderr, "[QUOTA WARNING] Usage inconsistent for ID %d:"
521 "actual (%llu, %llu) != expected (%llu, %llu)\n",
522 dq->dq_id, (long long)dq->dq_dqb.dqb_curspace,
523 (long long)dq->dq_dqb.dqb_curinodes,
524 (long long)dquot->dq_dqb.dqb_curspace,
525 (long long)dquot->dq_dqb.dqb_curinodes);
526 }
527
528 if (scan_data->update_limits) {
529 dq->dq_dqb.dqb_ihardlimit = dquot->dq_dqb.dqb_ihardlimit;
530 dq->dq_dqb.dqb_isoftlimit = dquot->dq_dqb.dqb_isoftlimit;
531 dq->dq_dqb.dqb_bhardlimit = dquot->dq_dqb.dqb_bhardlimit;
532 dq->dq_dqb.dqb_bsoftlimit = dquot->dq_dqb.dqb_bsoftlimit;
533 }
534
535 if (scan_data->update_usage) {
536 dq->dq_dqb.dqb_curspace = dquot->dq_dqb.dqb_curspace;
537 dq->dq_dqb.dqb_curinodes = dquot->dq_dqb.dqb_curinodes;
538 }
539
540 return 0;
541 }
542
543 /*
544 * Read all dquots from quota file into memory
545 */
quota_read_all_dquots(struct quota_handle * qh,quota_ctx_t qctx,int update_limits)546 static errcode_t quota_read_all_dquots(struct quota_handle *qh,
547 quota_ctx_t qctx, int update_limits)
548 {
549 struct scan_dquots_data scan_data;
550
551 scan_data.quota_dict = qctx->quota_dict[qh->qh_type];
552 scan_data.update_limits = update_limits;
553 scan_data.update_usage = 0;
554
555 return qh->qh_ops->scan_dquots(qh, scan_dquots_callback, &scan_data);
556 }
557
558 /*
559 * Write all memory dquots into quota file
560 */
561 #if 0 /* currently unused, but may be useful in the future? */
562 static errcode_t quota_write_all_dquots(struct quota_handle *qh,
563 quota_ctx_t qctx)
564 {
565 errcode_t err;
566
567 err = ext2fs_read_bitmaps(qctx->fs);
568 if (err)
569 return err;
570 write_dquots(qctx->quota_dict[qh->qh_type], qh);
571 ext2fs_mark_bb_dirty(qctx->fs);
572 qctx->fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
573 ext2fs_write_bitmaps(qctx->fs);
574 return 0;
575 }
576 #endif
577
578 /*
579 * Updates the in-memory quota limits from the given quota inode.
580 */
quota_update_limits(quota_ctx_t qctx,ext2_ino_t qf_ino,enum quota_type qtype)581 errcode_t quota_update_limits(quota_ctx_t qctx, ext2_ino_t qf_ino,
582 enum quota_type qtype)
583 {
584 struct quota_handle *qh;
585 errcode_t err;
586
587 if (!qctx)
588 return 0;
589
590 err = ext2fs_get_mem(sizeof(struct quota_handle), &qh);
591 if (err) {
592 log_debug("Unable to allocate quota handle");
593 return err;
594 }
595
596 err = quota_file_open(qctx, qh, qf_ino, qtype, -1, 0);
597 if (err) {
598 log_debug("Open quota file failed");
599 goto out;
600 }
601
602 quota_read_all_dquots(qh, qctx, 1);
603
604 err = quota_file_close(qctx, qh);
605 if (err) {
606 log_debug("Cannot finish IO on new quotafile: %s",
607 strerror(errno));
608 if (qh->qh_qf.e2_file)
609 ext2fs_file_close(qh->qh_qf.e2_file);
610 }
611 out:
612 ext2fs_free_mem(&qh);
613 return err;
614 }
615
616 /*
617 * Compares the measured quota in qctx->quota_dict with that in the quota inode
618 * on disk and updates the limits in qctx->quota_dict. 'usage_inconsistent' is
619 * set to 1 if the supplied and on-disk quota usage values are not identical.
620 */
quota_compare_and_update(quota_ctx_t qctx,enum quota_type qtype,int * usage_inconsistent)621 errcode_t quota_compare_and_update(quota_ctx_t qctx, enum quota_type qtype,
622 int *usage_inconsistent)
623 {
624 struct quota_handle qh;
625 struct scan_dquots_data scan_data;
626 struct dquot *dq;
627 dnode_t *n;
628 dict_t *dict = qctx->quota_dict[qtype];
629 errcode_t err = 0;
630
631 if (!dict)
632 goto out;
633
634 err = quota_file_open(qctx, &qh, 0, qtype, -1, 0);
635 if (err) {
636 log_debug("Open quota file failed");
637 goto out;
638 }
639
640 scan_data.quota_dict = qctx->quota_dict[qtype];
641 scan_data.update_limits = 1;
642 scan_data.update_usage = 0;
643 scan_data.usage_is_inconsistent = 0;
644 err = qh.qh_ops->scan_dquots(&qh, scan_dquots_callback, &scan_data);
645 if (err) {
646 log_debug("Error scanning dquots");
647 goto out_close_qh;
648 }
649
650 for (n = dict_first(dict); n; n = dict_next(dict, n)) {
651 dq = dnode_get(n);
652 if (!dq)
653 continue;
654 if ((dq->dq_flags & DQF_SEEN) == 0) {
655 fprintf(stderr, "[QUOTA WARNING] "
656 "Missing quota entry ID %d\n", dq->dq_id);
657 scan_data.usage_is_inconsistent = 1;
658 }
659 }
660 *usage_inconsistent = scan_data.usage_is_inconsistent;
661
662 out_close_qh:
663 err = quota_file_close(qctx, &qh);
664 if (err) {
665 log_debug("Cannot close quotafile: %s", error_message(errno));
666 if (qh.qh_qf.e2_file)
667 ext2fs_file_close(qh.qh_qf.e2_file);
668 }
669 out:
670 return err;
671 }
672
parse_quota_opts(const char * opts,int (* func)(char *))673 int parse_quota_opts(const char *opts, int (*func)(char *))
674 {
675 char *buf, *token, *next, *p;
676 int len;
677 int ret = 0;
678
679 len = strlen(opts);
680 buf = malloc(len + 1);
681 if (!buf) {
682 fprintf(stderr,
683 "Couldn't allocate memory to parse quota options!\n");
684 return -ENOMEM;
685 }
686 strcpy(buf, opts);
687 for (token = buf; token && *token; token = next) {
688 p = strchr(token, ',');
689 next = 0;
690 if (p) {
691 *p = 0;
692 next = p + 1;
693 }
694 ret = func(token);
695 if (ret)
696 break;
697 }
698 free(buf);
699 return ret;
700 }
701