xref: /illumos-gate/usr/src/cmd/fs.d/pcfs/fstyp/fstyp.c (revision 88ab226a)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 /*
22  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
23  * Use is subject to license terms.
24  */
25 
26 /*	Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T	*/
27 /*	  All Rights Reserved  	*/
28 
29 /*
30  * Portions of this source code were derived from Berkeley 4.3 BSD
31  * under license from the Regents of the University of California.
32  */
33 
34 #pragma ident	"%Z%%M%	%I%	%E% SMI"
35 
36 /*
37  * libfstyp module for pcfs
38  */
39 #include <sys/param.h>
40 #include <sys/types.h>
41 #include <sys/mntent.h>
42 #include <errno.h>
43 #include <sys/fs/pc_fs.h>
44 #include <sys/fs/pc_label.h>
45 #include <sys/fs/pc_dir.h>
46 #include <sys/stat.h>
47 #include <sys/vfs.h>
48 #include <stdio.h>
49 #include <unistd.h>
50 #include <string.h>
51 #include <strings.h>
52 #include <sys/mnttab.h>
53 #include <locale.h>
54 #include <libfstyp_module.h>
55 
56 #define	PC_LABEL_SIZE 11
57 
58 /* for the <sys/fs/pc_dir.h> PCDL_IS_LFN macro */
59 int	enable_long_filenames = 1;
60 
61 struct fstyp_fat16_bs {
62 	uint8_t		f_drvnum;
63 	uint8_t		f_reserved1;
64 	uint8_t		f_bootsig;
65 	uint8_t		f_volid[4];
66 	uint8_t		f_label[11];
67 	uint8_t		f_typestring[8];
68 };
69 
70 struct fstyp_fat32_bs {
71 	uint32_t	f_fatlength;
72 	uint16_t	f_flags;
73 	uint8_t		f_major;
74 	uint8_t		f_minor;
75 	uint32_t	f_rootcluster;
76 	uint16_t	f_infosector;
77 	uint16_t	f_backupboot;
78 	uint8_t		f_reserved2[12];
79 	uint8_t		f_drvnum;
80 	uint8_t		f_reserved1;
81 	uint8_t		f_bootsig;
82 	uint8_t		f_volid[4];
83 	uint8_t		f_label[11];
84 	uint8_t		f_typestring[8];
85 };
86 
87 typedef struct fstyp_pcfs {
88 	int		fd;
89 	off_t		offset;
90 	nvlist_t	*attr;
91 	struct bootsec	bs;
92 	struct fstyp_fat16_bs bs16;
93 	struct fstyp_fat32_bs bs32;
94 	ushort_t	bps;
95 	int		fattype;
96 	char		volume_label[PC_LABEL_SIZE + 1];
97 
98 	/* parameters derived or calculated per FAT spec */
99 	ulong_t		FATSz;
100 	ulong_t		TotSec;
101 	ulong_t		RootDirSectors;
102 	ulong_t		FirstDataSector;
103 	ulong_t		DataSec;
104 	ulong_t		CountOfClusters;
105 } fstyp_pcfs_t;
106 
107 
108 /* We should eventually make the structs "packed" so these won't be needed */
109 #define	PC_BPSEC(h)	ltohs((h)->bs.bps[0])
110 #define	PC_RESSEC(h)	ltohs((h)->bs.res_sec[0])
111 #define	PC_NROOTENT(h)	ltohs((h)->bs.rdirents[0])
112 #define	PC_NSEC(h)	ltohs((h)->bs.numsect[0])
113 #define	PC_DRVNUM(h)	(FSTYP_IS_32(h) ? (h)->bs32.f_drvnum : \
114 			    (h)->bs16.f_drvnum)
115 #define	PC_VOLID(a)	(FSTYP_IS_32(h) ? ltohi((h)->bs32.f_volid[0]) : \
116 			    ltohi((h)->bs16.f_volid[0]))
117 #define	PC_LABEL_ADDR(a) (FSTYP_IS_32(h) ? \
118 			    &((h)->bs32.f_label[0]) : &((h)->bs16.f_label[0]))
119 
120 #define	FSTYP_IS_32(h)	((h)->fattype == 32)
121 
122 #define	FSTYP_MAX_CLUSTER_SIZE	(64 * 1024)	/* though officially 32K */
123 #define	FSTYP_MAX_DIR_SIZE	(65536 * 32)
124 
125 static int	read_bootsec(fstyp_pcfs_t *h);
126 static int	valid_media(fstyp_pcfs_t *h);
127 static int	well_formed(fstyp_pcfs_t *h);
128 static void	calculate_parameters(fstyp_pcfs_t *h);
129 static void	determine_fattype(fstyp_pcfs_t *h);
130 static void	get_label(fstyp_pcfs_t *h);
131 static void	get_label_16(fstyp_pcfs_t *h);
132 static void	get_label_32(fstyp_pcfs_t *h);
133 static int	next_cluster_32(fstyp_pcfs_t *h, int n);
134 static boolean_t dir_find_label(fstyp_pcfs_t *h, struct pcdir *d, int nent);
135 static int	is_pcfs(fstyp_pcfs_t *h);
136 static int	dumpfs(fstyp_pcfs_t *h, FILE *fout, FILE *ferr);
137 static int	get_attr(fstyp_pcfs_t *h);
138 
139 int	fstyp_mod_init(int fd, off_t offset, fstyp_mod_handle_t *handle);
140 void	fstyp_mod_fini(fstyp_mod_handle_t handle);
141 int	fstyp_mod_ident(fstyp_mod_handle_t handle);
142 int	fstyp_mod_get_attr(fstyp_mod_handle_t handle, nvlist_t **attrp);
143 int	fstyp_mod_dump(fstyp_mod_handle_t handle, FILE *fout, FILE *ferr);
144 
145 int
fstyp_mod_init(int fd,off_t offset,fstyp_mod_handle_t * handle)146 fstyp_mod_init(int fd, off_t offset, fstyp_mod_handle_t *handle)
147 {
148 	struct fstyp_pcfs *h;
149 
150 	if ((h = calloc(1, sizeof (struct fstyp_pcfs))) == NULL) {
151 		return (FSTYP_ERR_NOMEM);
152 	}
153 	h->fd = fd;
154 	h->offset = offset;
155 
156 	*handle = (fstyp_mod_handle_t)h;
157 	return (0);
158 }
159 
160 void
fstyp_mod_fini(fstyp_mod_handle_t handle)161 fstyp_mod_fini(fstyp_mod_handle_t handle)
162 {
163 	struct fstyp_pcfs *h = (struct fstyp_pcfs *)handle;
164 
165 	if (h->attr == NULL) {
166 		nvlist_free(h->attr);
167 		h->attr = NULL;
168 	}
169 	free(h);
170 }
171 
172 int
fstyp_mod_ident(fstyp_mod_handle_t handle)173 fstyp_mod_ident(fstyp_mod_handle_t handle)
174 {
175 	struct fstyp_pcfs *h = (struct fstyp_pcfs *)handle;
176 
177 	return (is_pcfs(h));
178 }
179 
180 int
fstyp_mod_get_attr(fstyp_mod_handle_t handle,nvlist_t ** attrp)181 fstyp_mod_get_attr(fstyp_mod_handle_t handle, nvlist_t **attrp)
182 {
183 	struct fstyp_pcfs *h = (struct fstyp_pcfs *)handle;
184 	int error;
185 
186 	if (h->attr == NULL) {
187 		if (nvlist_alloc(&h->attr, NV_UNIQUE_NAME_TYPE, 0)) {
188 			return (FSTYP_ERR_NOMEM);
189 		}
190 		if ((error = get_attr(h)) != 0) {
191 			nvlist_free(h->attr);
192 			h->attr = NULL;
193 			return (error);
194 		}
195 	}
196 
197 	*attrp = h->attr;
198 	return (0);
199 }
200 
201 int
fstyp_mod_dump(fstyp_mod_handle_t handle,FILE * fout,FILE * ferr)202 fstyp_mod_dump(fstyp_mod_handle_t handle, FILE *fout, FILE *ferr)
203 {
204 	struct fstyp_pcfs *h = (struct fstyp_pcfs *)handle;
205 
206 	return (dumpfs(h, fout, ferr));
207 }
208 
209 
210 /*
211  * Read in boot sector. Convert into host endianness where possible.
212  */
213 static int
read_bootsec(fstyp_pcfs_t * h)214 read_bootsec(fstyp_pcfs_t *h)
215 {
216 	char 	buf[PC_SECSIZE];
217 
218 	(void) lseek(h->fd, h->offset, SEEK_SET);
219 	if (read(h->fd, buf, sizeof (buf)) != sizeof (buf)) {
220 		return (FSTYP_ERR_IO);
221 	}
222 
223 	bcopy(buf, &h->bs, sizeof (h->bs));
224 	bcopy(buf + sizeof (struct bootsec), &h->bs16, sizeof (h->bs16));
225 	bcopy(buf + sizeof (struct bootsec), &h->bs32, sizeof (h->bs32));
226 
227 	h->bs.fatsec = ltohs(h->bs.fatsec);
228 	h->bs.spt = ltohs(h->bs.spt);
229 	h->bs.nhead = ltohs(h->bs.nhead);
230 	h->bs.hiddensec = ltohi(h->bs.hiddensec);
231 	h->bs.totalsec = ltohi(h->bs.totalsec);
232 
233 	h->bs32.f_fatlength = ltohi(h->bs32.f_fatlength);
234 	h->bs32.f_flags = ltohs(h->bs32.f_flags);
235 	h->bs32.f_rootcluster = ltohi(h->bs32.f_rootcluster);
236 	h->bs32.f_infosector = ltohs(h->bs32.f_infosector);
237 	h->bs32.f_backupboot = ltohs(h->bs32.f_backupboot);
238 
239 	h->bps = PC_BPSEC(h);
240 
241 	return (0);
242 }
243 
244 static int
valid_media(fstyp_pcfs_t * h)245 valid_media(fstyp_pcfs_t *h)
246 {
247 	switch (h->bs.mediadesriptor) {
248 	case MD_FIXED:
249 	case SS8SPT:
250 	case DS8SPT:
251 	case SS9SPT:
252 	case DS9SPT:
253 	case DS18SPT:
254 	case DS9_15SPT:
255 		return (1);
256 	default:
257 		return (0);
258 	}
259 }
260 
261 static int
well_formed(fstyp_pcfs_t * h)262 well_formed(fstyp_pcfs_t *h)
263 {
264 	int fatmatch;
265 
266 	if (h->bs16.f_bootsig == 0x29) {
267 		fatmatch = ((h->bs16.f_typestring[0] == 'F' &&
268 		    h->bs16.f_typestring[1] == 'A' &&
269 		    h->bs16.f_typestring[2] == 'T') &&
270 		    (h->bs.fatsec > 0) &&
271 		    ((PC_NSEC(h) == 0 && h->bs.totalsec > 0) ||
272 		    PC_NSEC(h) > 0));
273 	} else if (h->bs32.f_bootsig == 0x29) {
274 		fatmatch = ((h->bs32.f_typestring[0] == 'F' &&
275 		    h->bs32.f_typestring[1] == 'A' &&
276 		    h->bs32.f_typestring[2] == 'T') &&
277 		    (h->bs.fatsec == 0 && h->bs32.f_fatlength > 0) &&
278 		    ((PC_NSEC(h) == 0 && h->bs.totalsec > 0) ||
279 		    PC_NSEC(h) > 0));
280 	} else {
281 		fatmatch = (PC_NSEC(h) > 0 && h->bs.fatsec > 0);
282 	}
283 
284 	return (fatmatch && h->bps > 0 && h->bps % 512 == 0 &&
285 	    h->bs.spcl > 0 && PC_RESSEC(h) >= 1 && h->bs.nfat > 0);
286 }
287 
288 static void
calculate_parameters(fstyp_pcfs_t * h)289 calculate_parameters(fstyp_pcfs_t *h)
290 {
291 	if (PC_NSEC(h) != 0) {
292 		h->TotSec = PC_NSEC(h);
293 	} else {
294 		h->TotSec = h->bs.totalsec;
295 	}
296 	if (h->bs.fatsec != 0) {
297 		h->FATSz = h->bs.fatsec;
298 	} else {
299 		h->FATSz = h->bs32.f_fatlength;
300 	}
301 	if ((h->bps == 0) || (h->bs.spcl == 0)) {
302 		return;
303 	}
304 	h->RootDirSectors =
305 	    ((PC_NROOTENT(h) * 32) + (h->bps - 1)) / h->bps;
306 	h->FirstDataSector =
307 	    PC_RESSEC(h) + h->bs.nfat * h->FATSz + h->RootDirSectors;
308 	h->DataSec = h->TotSec - h->FirstDataSector;
309 	h->CountOfClusters = h->DataSec / h->bs.spcl;
310 }
311 
312 static void
determine_fattype(fstyp_pcfs_t * h)313 determine_fattype(fstyp_pcfs_t *h)
314 {
315 	if ((h->CountOfClusters >= 4085 && h->CountOfClusters <= 4095) ||
316 	    (h->CountOfClusters >= 65525 && h->CountOfClusters <= 65535)) {
317 		h->fattype = 0;
318 	} else if (h->CountOfClusters < 4085) {
319 		h->fattype = 12;
320 	} else if (h->CountOfClusters < 65525) {
321 		h->fattype = 16;
322 	} else {
323 		h->fattype = 32;
324 	}
325 }
326 
327 static void
get_label(fstyp_pcfs_t * h)328 get_label(fstyp_pcfs_t *h)
329 {
330 	/*
331 	 * Use label from the boot sector by default.
332 	 * Can overwrite later with the one from root directory.
333 	 */
334 	(void) memcpy(h->volume_label, PC_LABEL_ADDR(h), PC_LABEL_SIZE);
335 	h->volume_label[PC_LABEL_SIZE] = '\0';
336 
337 	if (h->fattype == 0) {
338 		return;
339 	} else if (FSTYP_IS_32(h)) {
340 		get_label_32(h);
341 	} else {
342 		get_label_16(h);
343 	}
344 }
345 
346 /*
347  * Get volume label from the root directory entry.
348  * In FAT12/16 the root directory is of fixed size.
349  * It immediately follows the FATs
350  */
351 static void
get_label_16(fstyp_pcfs_t * h)352 get_label_16(fstyp_pcfs_t *h)
353 {
354 	ulong_t	FirstRootDirSecNum;
355 	int	secsize;
356 	off_t	offset;
357 	uint8_t	buf[PC_SECSIZE * 4];
358 	int	i;
359 	int	nent, resid;
360 
361 	if ((secsize = h->bps) > sizeof (buf)) {
362 		return;
363 	}
364 
365 	FirstRootDirSecNum = PC_RESSEC(h) + h->bs.nfat * h->bs.fatsec;
366 	offset = h->offset + FirstRootDirSecNum * secsize;
367 	resid = PC_NROOTENT(h);
368 
369 	for (i = 0; i < h->RootDirSectors; i++) {
370 		(void) lseek(h->fd, offset, SEEK_SET);
371 		if (read(h->fd, buf, secsize) != secsize) {
372 			return;
373 		}
374 
375 		nent = secsize / sizeof (struct pcdir);
376 		if (nent > resid) {
377 			nent = resid;
378 		}
379 		if (dir_find_label(h, (struct pcdir *)buf, nent)) {
380 			return;
381 		}
382 
383 		resid -= nent;
384 		offset += PC_SECSIZE;
385 	}
386 }
387 
388 /*
389  * Get volume label from the root directory entry.
390  * In FAT32 root is a usual directory, a cluster chain.
391  * It starts at BPB_RootClus.
392  */
393 static void
get_label_32(fstyp_pcfs_t * h)394 get_label_32(fstyp_pcfs_t *h)
395 {
396 	off_t	offset;
397 	int	clustersize;
398 	int	n;
399 	ulong_t	FirstSectorofCluster;
400 	uint8_t	*buf;
401 	int	nent;
402 	int	cnt = 0;
403 
404 	clustersize = h->bs.spcl * h->bps;
405 	if ((clustersize == 0) || (clustersize > FSTYP_MAX_CLUSTER_SIZE) ||
406 	    ((buf = calloc(1, clustersize)) == NULL)) {
407 		return;
408 	}
409 
410 	for (n = h->bs32.f_rootcluster; n != 0; n = next_cluster_32(h, n)) {
411 		FirstSectorofCluster =
412 		    (n - 2) * h->bs.spcl + h->FirstDataSector;
413 		offset = h->offset + FirstSectorofCluster * h->bps;
414 		(void) lseek(h->fd, offset, SEEK_SET);
415 		if (read(h->fd, buf, clustersize) != clustersize) {
416 			break;
417 		}
418 
419 		nent = clustersize / sizeof (struct pcdir);
420 		if (dir_find_label(h, (struct pcdir *)buf, nent)) {
421 			break;
422 		}
423 
424 		if (++cnt > FSTYP_MAX_DIR_SIZE / clustersize) {
425 			break;
426 		}
427 	}
428 
429 	free(buf);
430 }
431 
432 /*
433  * Get a FAT entry pointing to the next file cluster
434  */
435 int
next_cluster_32(fstyp_pcfs_t * h,int n)436 next_cluster_32(fstyp_pcfs_t *h, int n)
437 {
438 	uint8_t	buf[PC_SECSIZE];
439 	ulong_t	ThisFATSecNum;
440 	ulong_t	ThisFATEntOffset;
441 	off_t	offset;
442 	uint32_t val;
443 	int	next = 0;
444 
445 	ThisFATSecNum = PC_RESSEC(h) + (n * 4) / h->bps;
446 	ThisFATEntOffset = (n * 4) % h->bps;
447 	offset = h->offset + ThisFATSecNum * h->bps;
448 
449 	(void) lseek(h->fd, offset, SEEK_SET);
450 	if (read(h->fd, buf, sizeof (buf)) == sizeof (buf)) {
451 		val = buf[ThisFATEntOffset] & 0x0fffffff;
452 		next = ltohi(val);
453 	}
454 
455 	return (next);
456 }
457 
458 /*
459  * Given an array of pcdir structs, find one containing volume label.
460  */
461 static boolean_t
dir_find_label(fstyp_pcfs_t * h,struct pcdir * d,int nent)462 dir_find_label(fstyp_pcfs_t *h, struct pcdir *d, int nent)
463 {
464 	int	i;
465 
466 	for (i = 0; i < nent; i++, d++) {
467 		if (PCDL_IS_LFN(d))
468 			continue;
469 		if ((d->pcd_filename[0] != PCD_UNUSED) &&
470 		    (d->pcd_filename[0] != PCD_ERASED) &&
471 		    ((d->pcd_attr & (PCA_LABEL | PCA_DIR)) == PCA_LABEL) &&
472 		    (d->un.pcd_scluster_hi == 0) &&
473 		    (d->pcd_scluster_lo == 0)) {
474 			(void) memcpy(h->volume_label, d->pcd_filename,
475 			    PC_LABEL_SIZE);
476 			h->volume_label[PC_LABEL_SIZE] = '\0';
477 			return (B_TRUE);
478 		}
479 	}
480 	return (B_FALSE);
481 }
482 
483 static int
is_pcfs(fstyp_pcfs_t * h)484 is_pcfs(fstyp_pcfs_t *h)
485 {
486 	int	error;
487 
488 	if ((error = read_bootsec(h)) != 0) {
489 		return (error);
490 	}
491 	if (!valid_media(h)) {
492 		return (FSTYP_ERR_NO_MATCH);
493 	}
494 	if (!well_formed(h)) {
495 		return (FSTYP_ERR_NO_MATCH);
496 	}
497 
498 	calculate_parameters(h);
499 	determine_fattype(h);
500 	get_label(h);
501 
502 	return (0);
503 }
504 
505 /* ARGSUSED */
506 static int
dumpfs(fstyp_pcfs_t * h,FILE * fout,FILE * ferr)507 dumpfs(fstyp_pcfs_t *h, FILE *fout, FILE *ferr)
508 {
509 	(void) fprintf(fout,
510 	    "Bytes Per Sector  %d\t\tSectors Per Cluster    %d\n",
511 	    h->bps, h->bs.spcl);
512 	(void) fprintf(fout,
513 	    "Reserved Sectors  %d\t\tNumber of FATs         %d\n",
514 	    (unsigned short)PC_RESSEC(h), h->bs.nfat);
515 	(void) fprintf(fout,
516 	    "Root Dir Entries  %d\t\tNumber of Sectors      %d\n",
517 	    (unsigned short)PC_NROOTENT(h), (unsigned short)PC_NSEC(h));
518 	(void) fprintf(fout,
519 	    "Sectors Per FAT   %d\t\tSectors Per Track      %d\n",
520 	    h->bs.fatsec, h->bs.spt);
521 	(void) fprintf(fout,
522 	    "Number of Heads   %d\t\tNumber Hidden Sectors  %d\n",
523 	    h->bs.nhead, h->bs.hiddensec);
524 	(void) fprintf(fout, "Volume ID: 0x%x\n", PC_VOLID(h));
525 	(void) fprintf(fout, "Volume Label: %s\n", h->volume_label);
526 	(void) fprintf(fout, "Drive Number: 0x%x\n", PC_DRVNUM(h));
527 	(void) fprintf(fout, "Media Type: 0x%x   ", h->bs.mediadesriptor);
528 
529 	switch (h->bs.mediadesriptor) {
530 	case MD_FIXED:
531 		(void) fprintf(fout, "\"Fixed\" Disk\n");
532 		break;
533 	case SS8SPT:
534 		(void) fprintf(fout, "Single Sided, 8 Sectors Per Track\n");
535 		break;
536 	case DS8SPT:
537 		(void) fprintf(fout, "Double Sided, 8 Sectors Per Track\n");
538 		break;
539 	case SS9SPT:
540 		(void) fprintf(fout, "Single Sided, 9 Sectors Per Track\n");
541 		break;
542 	case DS9SPT:
543 		(void) fprintf(fout, "Double Sided, 9 Sectors Per Track\n");
544 		break;
545 	case DS18SPT:
546 		(void) fprintf(fout, "Double Sided, 18 Sectors Per Track\n");
547 		break;
548 	case DS9_15SPT:
549 		(void) fprintf(fout, "Double Sided, 9-15 Sectors Per Track\n");
550 		break;
551 	default:
552 		(void) fprintf(fout, "Unknown Media Type\n");
553 	}
554 
555 	return (0);
556 }
557 
558 #define	ADD_STRING(h, name, value) \
559 	if (nvlist_add_string(h->attr, name, value) != 0) { \
560 		return (FSTYP_ERR_NOMEM); \
561 	}
562 
563 #define	ADD_UINT32(h, name, value) \
564 	if (nvlist_add_uint32(h->attr, name, value) != 0) { \
565 		return (FSTYP_ERR_NOMEM); \
566 	}
567 
568 #define	ADD_UINT64(h, name, value) \
569 	if (nvlist_add_uint64(h->attr, name, value) != 0) { \
570 		return (FSTYP_ERR_NOMEM); \
571 	}
572 
573 #define	ADD_BOOL(h, name, value) \
574 	if (nvlist_add_boolean_value(h->attr, name, value) != 0) { \
575 		return (FSTYP_ERR_NOMEM); \
576 	}
577 
578 static int
get_attr(fstyp_pcfs_t * h)579 get_attr(fstyp_pcfs_t *h)
580 {
581 	char	s[64];
582 
583 	ADD_UINT32(h, "bytes_per_sector", h->bps);
584 	ADD_UINT32(h, "sectors_per_cluster", h->bs.spcl);
585 	ADD_UINT32(h, "reserved_sectors", PC_RESSEC(h));
586 	ADD_UINT32(h, "fats", h->bs.nfat);
587 	ADD_UINT32(h, "root_entry_count", PC_NROOTENT(h));
588 	ADD_UINT32(h, "total_sectors_16", PC_NSEC(h));
589 	ADD_UINT32(h, "media", h->bs.mediadesriptor);
590 	ADD_UINT32(h, "fat_size_16", h->bs.fatsec);
591 	ADD_UINT32(h, "sectors_per_track", h->bs.spt);
592 	ADD_UINT32(h, "heads", h->bs.nhead);
593 	ADD_UINT32(h, "hidden_sectors", h->bs.hiddensec);
594 	ADD_UINT32(h, "total_sectors_32", h->bs.totalsec);
595 	ADD_UINT32(h, "drive_number", PC_DRVNUM(h));
596 	ADD_UINT32(h, "volume_id", PC_VOLID(h));
597 	ADD_STRING(h, "volume_label", h->volume_label);
598 	if (FSTYP_IS_32(h)) {
599 		ADD_UINT32(h, "fat_size_32", h->bs32.f_fatlength);
600 	}
601 	ADD_UINT32(h, "total_sectors", h->TotSec);
602 	ADD_UINT32(h, "fat_size", h->FATSz);
603 	ADD_UINT32(h, "count_of_clusters", h->CountOfClusters);
604 	ADD_UINT32(h, "fat_entry_size", h->fattype);
605 
606 	ADD_BOOL(h, "gen_clean", B_TRUE);
607 	if (PC_VOLID(a) != 0) {
608 		(void) snprintf(s, sizeof (s), "%08x", PC_VOLID(a));
609 		ADD_STRING(h, "gen_guid", s);
610 	}
611 	(void) snprintf(s, sizeof (s), "%d", h->fattype);
612 	ADD_STRING(h, "gen_version", s);
613 	ADD_STRING(h, "gen_volume_label", h->volume_label);
614 
615 	return (0);
616 }
617