summaryrefslogtreecommitdiffstats
path: root/sbin/quotacheck/quotacheck.c
blob: d4e819f598383df54967ac845336637e045d04b5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
/*
 * Copyright (c) 1980, 1990, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Robert Elz at The University of Melbourne.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#if 0
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1980, 1990, 1993\n\
	The Regents of the University of California.  All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)quotacheck.c	8.3 (Berkeley) 1/29/94";
#endif /* not lint */
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

/*
 * Fix up / report on disk quotas & usage
 */
#include <sys/param.h>
#include <sys/disklabel.h>
#include <sys/mount.h>
#include <sys/stat.h>

#include <ufs/ufs/dinode.h>
#include <ufs/ufs/quota.h>
#include <ufs/ffs/fs.h>

#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <fstab.h>
#include <grp.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "quotacheck.h"

char *qfname = QUOTAFILENAME;
char *qfextension[] = INITQFNAMES;
char *quotagroup = QUOTAGROUP;

union {
	struct	fs	sblk;
	char	dummy[MAXBSIZE];
} sb_un;
#define	sblock	sb_un.sblk
union {
	struct	cg	cgblk;
	char	dummy[MAXBSIZE];
} cg_un;
#define	cgblk	cg_un.cgblk
long dev_bsize = 1;
ino_t maxino;

union dinode {
	struct ufs1_dinode dp1;
	struct ufs2_dinode dp2;
};
#define	DIP(dp, field) \
	((sblock.fs_magic == FS_UFS1_MAGIC) ? \
	(dp)->dp1.field : (dp)->dp2.field)

#define	HASUSR	1
#define	HASGRP	2

struct fileusage {
	struct	fileusage *fu_next;
	u_long	fu_curinodes;
	u_long	fu_curblocks;
	u_long	fu_id;
	char	fu_name[1];
	/* actually bigger */
};
#define FUHASH 1024	/* must be power of two */
struct fileusage *fuhead[MAXQUOTAS][FUHASH];

int	aflag;			/* all file systems */
int	gflag;			/* check group quotas */
int	uflag;			/* check user quotas */
int	vflag;			/* verbose */
int	fi;			/* open disk file descriptor */

struct fileusage *
	 addid(u_long, int, char *, char *);
char	*blockcheck(char *);
void	 bread(ufs2_daddr_t, char *, long);
void	 freeinodebuf(void);
union dinode *
	 getnextinode(ino_t);
int	 getquotagid(void);
int	 hasquota(struct fstab *, int, char **);
struct fileusage *
	 lookup(u_long, int);
struct quotaname *needchk(struct fstab *);
int	 oneof(char *, char*[], int);
void	 printchanges(char *, int, struct dqblk *, struct fileusage *, u_long);
void	 setinodebuf(ino_t);
int	 update(char *, char *, int);
void	 usage(void);

int
main(argc, argv)
	int argc;
	char *argv[];
{
	struct fstab *fs;
	struct passwd *pw;
	struct group *gr;
	struct quotaname *qnp;
	int i, argnum, maxrun, errs, ch;
	long done = 0;
	char *name;

	errs = maxrun = 0;
	while ((ch = getopt(argc, argv, "aguvl:")) != -1) {
		switch(ch) {
		case 'a':
			aflag++;
			break;
		case 'g':
			gflag++;
			break;
		case 'u':
			uflag++;
			break;
		case 'v':
			vflag++;
			break;
		case 'l':
			maxrun = atoi(optarg);
			break;
		default:
			usage();
		}
	}
	argc -= optind;
	argv += optind;
	if ((argc == 0 && !aflag) || (argc > 0 && aflag))
		usage();
	if (!gflag && !uflag) {
		gflag++;
		uflag++;
	}
	if (gflag) {
		setgrent();
		while ((gr = getgrent()) != NULL)
			(void) addid((u_long)gr->gr_gid, GRPQUOTA, gr->gr_name,
			    NULL);
		endgrent();
	}
	if (uflag) {
		setpwent();
		while ((pw = getpwent()) != NULL)
			(void) addid((u_long)pw->pw_uid, USRQUOTA, pw->pw_name,
			    NULL);
		endpwent();
	}
	/*
	 * The maxrun (-l) option is now deprecated.
	 */
	if (maxrun > 0)
		warnx("the -l option is now deprecated");
	if (aflag)
		exit(checkfstab());
	if (setfsent() == 0)
		errx(1, "%s: can't open", FSTAB);
	while ((fs = getfsent()) != NULL) {
		if (((argnum = oneof(fs->fs_file, argv, argc)) >= 0 ||
		    (argnum = oneof(fs->fs_spec, argv, argc)) >= 0) &&
		    (qnp = needchk(fs)) &&
		    (name = blockcheck(fs->fs_spec))) {
			done |= 1 << argnum;
			errs += chkquota(name, fs->fs_file, qnp);
		}
	}
	endfsent();
	for (i = 0; i < argc; i++)
		if ((done & (1 << i)) == 0)
			fprintf(stderr, "%s not found in %s\n",
				argv[i], FSTAB);
	exit(errs);
}

void
usage()
{
	(void)fprintf(stderr, "%s\n%s\n", 
		"usage: quotacheck [-guv] [-l maxrun] -a",
		"       quotacheck [-guv] filesystem ...");
	exit(1);
}

struct quotaname *
needchk(fs)
	struct fstab *fs;
{
	struct quotaname *qnp;
	char *qfnp;

	if (strcmp(fs->fs_vfstype, "ufs") ||
	    strcmp(fs->fs_type, FSTAB_RW))
		return (NULL);
	if ((qnp = malloc(sizeof(*qnp))) == NULL)
		errx(1, "malloc failed");
	qnp->flags = 0;
	if (gflag && hasquota(fs, GRPQUOTA, &qfnp)) {
		strcpy(qnp->grpqfname, qfnp);
		qnp->flags |= HASGRP;
	}
	if (uflag && hasquota(fs, USRQUOTA, &qfnp)) {
		strcpy(qnp->usrqfname, qfnp);
		qnp->flags |= HASUSR;
	}
	if (qnp->flags)
		return (qnp);
	free(qnp);
	return (NULL);
}

/*
 * Possible superblock locations ordered from most to least likely.
 */
static int sblock_try[] = SBLOCKSEARCH;

/*
 * Scan the specified file system to check quota(s) present on it.
 */
int
chkquota(fsname, mntpt, qnp)
	char *fsname, *mntpt;
	struct quotaname *qnp;
{
	struct fileusage *fup;
	union dinode *dp;
	int cg, i, mode, errs = 0;
	ino_t ino, inosused, userino = 0, groupino = 0;
	dev_t dev, userdev = 0, groupdev = 0;
	char *cp;
	struct stat sb;

	if (qnp == NULL)
		err(1, "null quota information passed to chkquota()\n");
	if ((fi = open(fsname, O_RDONLY, 0)) < 0) {
		warn("%s", fsname);
		return (1);
	}
	if ((stat(mntpt, &sb)) < 0) {
		warn("%s", mntpt);
		return (1);
	}
	dev = sb.st_dev;
	if (vflag) {
		(void)printf("*** Checking ");
		if (qnp->flags & HASUSR)
			(void)printf("%s%s", qfextension[USRQUOTA],
			    (qnp->flags & HASGRP) ? " and " : "");
		if (qnp->flags & HASGRP)
			(void)printf("%s", qfextension[GRPQUOTA]);
		(void)printf(" quotas for %s (%s)\n", fsname, mntpt);
	}
	if (qnp->flags & HASUSR) {
		if (stat(qnp->usrqfname, &sb) == 0) {
			userino = sb.st_ino;
			userdev = sb.st_dev;
		}
	}
	if (qnp->flags & HASGRP) {
		if (stat(qnp->grpqfname, &sb) == 0) {
			groupino = sb.st_ino;
			groupdev = sb.st_dev;
		}
	}
	sync();
	dev_bsize = 1;
	for (i = 0; sblock_try[i] != -1; i++) {
		bread(sblock_try[i], (char *)&sblock, (long)SBLOCKSIZE);
		if ((sblock.fs_magic == FS_UFS1_MAGIC ||
		     (sblock.fs_magic == FS_UFS2_MAGIC &&
		      sblock.fs_sblockloc == sblock_try[i])) &&
		    sblock.fs_bsize <= MAXBSIZE &&
		    sblock.fs_bsize >= sizeof(struct fs))
			break;
	}
	if (sblock_try[i] == -1) {
		warn("Cannot find file system superblock");
		return (1);
	}
	dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1);
	maxino = sblock.fs_ncg * sblock.fs_ipg;
	for (cg = 0; cg < sblock.fs_ncg; cg++) {
		ino = cg * sblock.fs_ipg;
		setinodebuf(ino);
		bread(fsbtodb(&sblock, cgtod(&sblock, cg)), (char *)(&cgblk),
		    sblock.fs_cgsize);
		if (sblock.fs_magic == FS_UFS2_MAGIC)
			inosused = cgblk.cg_initediblk;
		else
			inosused = sblock.fs_ipg;
		/*
		 * If we are using soft updates, then we can trust the
		 * cylinder group inode allocation maps to tell us which
		 * inodes are allocated. We will scan the used inode map
		 * to find the inodes that are really in use, and then
		 * read only those inodes in from disk.
		 */
		if (sblock.fs_flags & FS_DOSOFTDEP) {
			if (!cg_chkmagic(&cgblk))
				errx(1, "CG %d: BAD MAGIC NUMBER\n", cg);
			cp = &cg_inosused(&cgblk)[(inosused - 1) / CHAR_BIT];
			for ( ; inosused > 0; inosused -= CHAR_BIT, cp--) {
				if (*cp == 0)
					continue;
				for (i = 1 << (CHAR_BIT - 1); i > 0; i >>= 1) {
					if (*cp & i)
						break;
					inosused--;
				}
				break;
			}
			if (inosused <= 0)
				continue;
		}
		for (i = 0; i < inosused; i++, ino++) {
			if ((dp = getnextinode(ino)) == NULL || ino < ROOTINO ||
			    (mode = DIP(dp, di_mode) & IFMT) == 0)
				continue;
			/*
			 * XXX: Do not account for UIDs or GIDs that appear
			 * to be negative to prevent generating 100GB+
			 * quota files.
			 */
			if ((int)DIP(dp, di_uid) < 0 || 
			    (int)DIP(dp, di_gid) < 0) {
				if (vflag) {
					if (aflag)
						(void)printf("%s: ", mntpt);
			(void)printf("out of range UID/GID (%u/%u) ino=%u\n",
					    DIP(dp, di_uid), DIP(dp,di_gid),
					    ino);
				}
				continue;
			}

			/* 
			 * Do not account for file system snapshot files
			 * or the actual quota data files to be consistent
			 * with how they are handled inside the kernel.
			 */
#ifdef	SF_SNAPSHOT
			if (DIP(dp, di_flags) & SF_SNAPSHOT)
				continue;
#endif
			if ((ino == userino && dev == userdev) ||
			    (ino == groupino && dev == groupdev))
				continue;
			if (qnp->flags & HASGRP) {
				fup = addid((u_long)DIP(dp, di_gid), GRPQUOTA,
				    (char *)0, mntpt);
				fup->fu_curinodes++;
				if (mode == IFREG || mode == IFDIR ||
				    mode == IFLNK)
					fup->fu_curblocks += DIP(dp, di_blocks);
			}
			if (qnp->flags & HASUSR) {
				fup = addid((u_long)DIP(dp, di_uid), USRQUOTA,
				    (char *)0, mntpt);
				fup->fu_curinodes++;
				if (mode == IFREG || mode == IFDIR ||
				    mode == IFLNK)
					fup->fu_curblocks += DIP(dp, di_blocks);
			}
		}
	}
	freeinodebuf();
	if (qnp->flags & HASUSR)
		errs += update(mntpt, qnp->usrqfname, USRQUOTA);
	if (qnp->flags & HASGRP)
		errs += update(mntpt, qnp->grpqfname, GRPQUOTA);
	close(fi);
	(void)fflush(stdout);
	return (errs);
}

/*
 * Update a specified quota file.
 */
int
update(fsname, quotafile, type)
	char *fsname, *quotafile;
	int type;
{
	struct fileusage *fup;
	FILE *qfi, *qfo;
	u_long id, lastid, highid = 0;
	off_t offset;
	int i;
	struct dqblk dqbuf;
	struct stat sb;
	static int warned = 0;
	static struct dqblk zerodqbuf;
	static struct fileusage zerofileusage;

	if ((qfo = fopen(quotafile, "r+")) == NULL) {
		if (errno == ENOENT)
			qfo = fopen(quotafile, "w+");
		if (qfo) {
			warnx("creating quota file %s", quotafile);
#define	MODE	(S_IRUSR|S_IWUSR|S_IRGRP)
			(void) fchown(fileno(qfo), getuid(), getquotagid());
			(void) fchmod(fileno(qfo), MODE);
		} else {
			warn("%s", quotafile);
			return (1);
		}
	}
	if ((qfi = fopen(quotafile, "r")) == NULL) {
		warn("%s", quotafile);
		(void) fclose(qfo);
		return (1);
	}
	if (quotactl(fsname, QCMD(Q_SYNC, type), (u_long)0, (caddr_t)0) < 0 &&
	    errno == EOPNOTSUPP && !warned && vflag) {
		warned++;
		(void)printf("*** Warning: %s\n",
		    "Quotas are not compiled into this kernel");
	}
	if (fstat(fileno(qfi), &sb) < 0) {
		warn("Cannot fstat quota file %s\n", quotafile);
		(void) fclose(qfo);
		(void) fclose(qfi);
		return (1);
	}
	if ((sb.st_size % sizeof(struct dqblk)) != 0)
		warn("%s size is not a multiple of dqblk\n", quotafile);

	/*
	 * Scan the on-disk quota file and record any usage changes.
	 */

	if (sb.st_size != 0)
		lastid = (sb.st_size / sizeof(struct dqblk)) - 1;
	else
		lastid = 0;
	for (id = 0, offset = 0; id <= lastid; 
	    id++, offset += sizeof(struct dqblk)) {
		if (fread((char *)&dqbuf, sizeof(struct dqblk), 1, qfi) == 0)
			dqbuf = zerodqbuf;
		if ((fup = lookup(id, type)) == NULL)
			fup = &zerofileusage;
		if (fup->fu_curinodes || fup->fu_curblocks ||
		    dqbuf.dqb_bsoftlimit || dqbuf.dqb_bhardlimit ||
		    dqbuf.dqb_isoftlimit || dqbuf.dqb_ihardlimit)
			highid = id;
		if (dqbuf.dqb_curinodes == fup->fu_curinodes &&
		    dqbuf.dqb_curblocks == fup->fu_curblocks) {
			fup->fu_curinodes = 0;
			fup->fu_curblocks = 0;
			continue;
		}
		printchanges(fsname, type, &dqbuf, fup, id);
		/*
		 * Reset time limit if have a soft limit and were
		 * previously under it, but are now over it.
		 */
		if (dqbuf.dqb_bsoftlimit && id != 0 &&
		    dqbuf.dqb_curblocks < dqbuf.dqb_bsoftlimit &&
		    fup->fu_curblocks >= dqbuf.dqb_bsoftlimit)
			dqbuf.dqb_btime = 0;
		if (dqbuf.dqb_isoftlimit && id != 0 &&
		    dqbuf.dqb_curinodes < dqbuf.dqb_isoftlimit &&
		    fup->fu_curinodes >= dqbuf.dqb_isoftlimit)
			dqbuf.dqb_itime = 0;
		dqbuf.dqb_curinodes = fup->fu_curinodes;
		dqbuf.dqb_curblocks = fup->fu_curblocks;
		if (fseeko(qfo, offset, SEEK_SET) < 0) {
			warn("%s: seek failed", quotafile);
			return(1);
		}
		fwrite((char *)&dqbuf, sizeof(struct dqblk), 1, qfo);
		(void) quotactl(fsname, QCMD(Q_SETUSE, type), id,
		    (caddr_t)&dqbuf);
		fup->fu_curinodes = 0;
		fup->fu_curblocks = 0;
	}

	/*
	 * Walk the hash table looking for ids with non-zero usage
	 * that are not currently recorded in the quota file. E.g.
	 * ids that are past the end of the current file.
	 */

	for (i = 0; i < FUHASH; i++) {
		for (fup = fuhead[type][i]; fup != NULL; fup = fup->fu_next) {
			if (fup->fu_id <= lastid)
				continue;
			if (fup->fu_curinodes == 0 && fup->fu_curblocks == 0)
				continue;
			bzero(&dqbuf, sizeof(struct dqblk));
			if (fup->fu_id > highid)
				highid = fup->fu_id;
			printchanges(fsname, type, &dqbuf, fup, id);
			dqbuf.dqb_curinodes = fup->fu_curinodes;
			dqbuf.dqb_curblocks = fup->fu_curblocks;
			offset = (off_t)fup->fu_id * sizeof(struct dqblk);
			if (fseeko(qfo, offset, SEEK_SET) < 0) {
				warn("%s: seek failed", quotafile);
				return(1);
			}
			fwrite((char *)&dqbuf, sizeof(struct dqblk), 1, qfo);
			(void) quotactl(fsname, QCMD(Q_SETUSE, type), id,
		    	    (caddr_t)&dqbuf);
			fup->fu_curinodes = 0;
			fup->fu_curblocks = 0;
		}
	}
	fclose(qfi);
	fflush(qfo);
	ftruncate(fileno(qfo),
	    (((off_t)highid + 1) * sizeof(struct dqblk)));
	fclose(qfo);
	return (0);
}

/*
 * Check to see if target appears in list of size cnt.
 */
int
oneof(target, list, cnt)
	char *target, *list[];
	int cnt;
{
	int i;

	for (i = 0; i < cnt; i++)
		if (strcmp(target, list[i]) == 0)
			return (i);
	return (-1);
}

/*
 * Determine the group identifier for quota files.
 */
int
getquotagid()
{
	struct group *gr;

	if ((gr = getgrnam(quotagroup)) != NULL)
		return (gr->gr_gid);
	return (-1);
}

/*
 * Check to see if a particular quota is to be enabled.
 */
int
hasquota(fs, type, qfnamep)
	struct fstab *fs;
	int type;
	char **qfnamep;
{
	char *opt;
	char *cp;
	struct statfs sfb;
	static char initname, usrname[100], grpname[100];
	static char buf[BUFSIZ];

	if (!initname) {
		(void)snprintf(usrname, sizeof(usrname), "%s%s",
		    qfextension[USRQUOTA], qfname);
		(void)snprintf(grpname, sizeof(grpname), "%s%s",
		    qfextension[GRPQUOTA], qfname);
		initname = 1;
	}
	strcpy(buf, fs->fs_mntops);
	for (opt = strtok(buf, ","); opt; opt = strtok(NULL, ",")) {
		if ((cp = index(opt, '=')) != NULL)
			*cp++ = '\0';
		if (type == USRQUOTA && strcmp(opt, usrname) == 0)
			break;
		if (type == GRPQUOTA && strcmp(opt, grpname) == 0)
			break;
	}
	if (!opt)
		return (0);
	if (cp)
		*qfnamep = cp;
	else {
		(void)snprintf(buf, sizeof(buf), "%s/%s.%s", fs->fs_file,
		    qfname, qfextension[type]);
		*qfnamep = buf;
	}
	if (statfs(fs->fs_file, &sfb) != 0) {
		warn("cannot statfs mount point %s", fs->fs_file);
		return (0);
	}
	if (strcmp(fs->fs_file, sfb.f_mntonname)) {
		warnx("%s not mounted for %s quotas", fs->fs_file,
		    type == USRQUOTA ? "user" : "group");
		return (0);
	}
	return (1);
}

/*
 * Routines to manage the file usage table.
 *
 * Lookup an id of a specific type.
 */
struct fileusage *
lookup(id, type)
	u_long id;
	int type;
{
	struct fileusage *fup;

	for (fup = fuhead[type][id & (FUHASH-1)]; fup != 0; fup = fup->fu_next)
		if (fup->fu_id == id)
			return (fup);
	return (NULL);
}

/*
 * Add a new file usage id if it does not already exist.
 */
struct fileusage *
addid(id, type, name, fsname)
	u_long id;
	int type;
	char *name;
	char *fsname;
{
	struct fileusage *fup, **fhp;
	int len;

	if ((fup = lookup(id, type)) != NULL)
		return (fup);
	if (name)
		len = strlen(name);
	else
		len = 0;
	if ((fup = calloc(1, sizeof(*fup) + len)) == NULL)
		errx(1, "calloc failed");
	fhp = &fuhead[type][id & (FUHASH - 1)];
	fup->fu_next = *fhp;
	*fhp = fup;
	fup->fu_id = id;
	if (name)
		bcopy(name, fup->fu_name, len + 1);
	else {
		(void)sprintf(fup->fu_name, "%lu", id);
		if (vflag) {
			if (aflag && fsname != NULL)
				(void)printf("%s: ", fsname);
			printf("unknown %cid: %lu\n", 
			    type == USRQUOTA ? 'u' : 'g', id);
		}
	}
	return (fup);
}

/*
 * Special purpose version of ginode used to optimize pass
 * over all the inodes in numerical order.
 */
static ino_t nextino, lastinum, lastvalidinum;
static long readcnt, readpercg, fullcnt, inobufsize, partialcnt, partialsize;
static caddr_t inodebuf;
#define INOBUFSIZE	56*1024		/* size of buffer to read inodes */

union dinode *
getnextinode(ino_t inumber)
{
	long size;
	ufs2_daddr_t dblk;
	union dinode *dp;
	static caddr_t nextinop;

	if (inumber != nextino++ || inumber > lastvalidinum)
		errx(1, "bad inode number %d to nextinode", inumber);
	if (inumber >= lastinum) {
		readcnt++;
		dblk = fsbtodb(&sblock, ino_to_fsba(&sblock, lastinum));
		if (readcnt % readpercg == 0) {
			size = partialsize;
			lastinum += partialcnt;
		} else {
			size = inobufsize;
			lastinum += fullcnt;
		}
		/*
		 * If bread returns an error, it will already have zeroed
		 * out the buffer, so we do not need to do so here.
		 */
		bread(dblk, inodebuf, size);
		nextinop = inodebuf;
	}
	dp = (union dinode *)nextinop;
	if (sblock.fs_magic == FS_UFS1_MAGIC)
		nextinop += sizeof(struct ufs1_dinode);
	else
		nextinop += sizeof(struct ufs2_dinode);
	return (dp);
}

/*
 * Prepare to scan a set of inodes.
 */
void
setinodebuf(ino_t inum)
{

	if (inum % sblock.fs_ipg != 0)
		errx(1, "bad inode number %d to setinodebuf", inum);
	lastvalidinum = inum + sblock.fs_ipg - 1;
	nextino = inum;
	lastinum = inum;
	readcnt = 0;
	if (inodebuf != NULL)
		return;
	inobufsize = blkroundup(&sblock, INOBUFSIZE);
	fullcnt = inobufsize / ((sblock.fs_magic == FS_UFS1_MAGIC) ?
	    sizeof(struct ufs1_dinode) : sizeof(struct ufs2_dinode));
	readpercg = sblock.fs_ipg / fullcnt;
	partialcnt = sblock.fs_ipg % fullcnt;
	partialsize = partialcnt * ((sblock.fs_magic == FS_UFS1_MAGIC) ?
	    sizeof(struct ufs1_dinode) : sizeof(struct ufs2_dinode));
	if (partialcnt != 0) {
		readpercg++;
	} else {
		partialcnt = fullcnt;
		partialsize = inobufsize;
	}
	if ((inodebuf = malloc((unsigned)inobufsize)) == NULL)
		errx(1, "cannot allocate space for inode buffer");
}

/*
 * Free up data structures used to scan inodes.
 */
void
freeinodebuf()
{

	if (inodebuf != NULL)
		free(inodebuf);
	inodebuf = NULL;
}

/*
 * Read specified disk blocks.
 */
void
bread(bno, buf, cnt)
	ufs2_daddr_t bno;
	char *buf;
	long cnt;
{

	if (lseek(fi, (off_t)bno * dev_bsize, SEEK_SET) < 0 ||
	    read(fi, buf, cnt) != cnt)
		errx(1, "bread failed on block %ld", (long)bno);
}

/*
 * Display updated block and i-node counts.
 */
void
printchanges(fsname, type, dp, fup, id)
	char *fsname;
	int type;
	struct dqblk *dp;
	struct fileusage *fup;
	u_long id;
{
	if (!vflag)
		return;
	if (aflag)
		(void)printf("%s: ", fsname);
	if (fup->fu_name[0] == '\0')
		(void)printf("%-8lu fixed ", id);
	else
		(void)printf("%-8s fixed ", fup->fu_name);
	switch (type) {

	case GRPQUOTA:
		(void)printf("(group):");
		break;

	case USRQUOTA:
		(void)printf("(user): ");
		break;

	default:
		(void)printf("(unknown quota type %d)", type);
		break;
	}
	if (dp->dqb_curinodes != fup->fu_curinodes)
		(void)printf("\tinodes %lu -> %lu", (u_long)dp->dqb_curinodes,
		    (u_long)fup->fu_curinodes);
	if (dp->dqb_curblocks != fup->fu_curblocks)
		(void)printf("\tblocks %lu -> %lu", 
		    (u_long)dp->dqb_curblocks,
		    (u_long)fup->fu_curblocks);
	(void)printf("\n");
}
OpenPOWER on IntegriCloud