blob: 15bfb7b1e04480470e389a075f9a3c155111d6aa [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * fs/partitions/msdos.c
3 *
4 * Code extracted from drivers/block/genhd.c
5 * Copyright (C) 1991-1998 Linus Torvalds
6 *
7 * Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
8 * in the early extended-partition checks and added DM partitions
9 *
10 * Support for DiskManager v6.0x added by Mark Lord,
11 * with information provided by OnTrack. This now works for linux fdisk
12 * and LILO, as well as loadlin and bootln. Note that disks other than
13 * /dev/hda *must* have a "DOS" type 0x51 partition in the first slot (hda1).
14 *
15 * More flexible handling of extended partitions - aeb, 950831
16 *
17 * Check partition table on IDE disks for common CHS translations
18 *
19 * Re-organised Feb 1998 Russell King
20 */
Frank Seidel0607fd02008-04-28 02:16:31 -070021#include <linux/msdos_fs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070022
23#include "check.h"
24#include "msdos.h"
25#include "efi.h"
26
27/*
28 * Many architectures don't like unaligned accesses, while
29 * the nr_sects and start_sect partition table entries are
30 * at a 2 (mod 4) address.
31 */
32#include <asm/unaligned.h>
33
Daniel Taylor3fbf5862010-03-23 13:35:50 -070034#define SYS_IND(p) get_unaligned(&p->sys_ind)
Linus Torvalds1da177e2005-04-16 15:20:36 -070035
Daniel Taylor3fbf5862010-03-23 13:35:50 -070036static inline sector_t nr_sects(struct partition *p)
37{
38 return (sector_t)get_unaligned_le32(&p->nr_sects);
39}
40
41static inline sector_t start_sect(struct partition *p)
42{
43 return (sector_t)get_unaligned_le32(&p->start_sect);
44}
Linus Torvalds1da177e2005-04-16 15:20:36 -070045
46static inline int is_extended_partition(struct partition *p)
47{
48 return (SYS_IND(p) == DOS_EXTENDED_PARTITION ||
49 SYS_IND(p) == WIN98_EXTENDED_PARTITION ||
50 SYS_IND(p) == LINUX_EXTENDED_PARTITION);
51}
52
53#define MSDOS_LABEL_MAGIC1 0x55
54#define MSDOS_LABEL_MAGIC2 0xAA
55
56static inline int
57msdos_magic_present(unsigned char *p)
58{
59 return (p[0] == MSDOS_LABEL_MAGIC1 && p[1] == MSDOS_LABEL_MAGIC2);
60}
61
Olaf Heringe1dfa922006-09-29 01:59:39 -070062/* Value is EBCDIC 'IBMA' */
63#define AIX_LABEL_MAGIC1 0xC9
64#define AIX_LABEL_MAGIC2 0xC2
65#define AIX_LABEL_MAGIC3 0xD4
66#define AIX_LABEL_MAGIC4 0xC1
Tejun Heo1493bf22010-05-15 20:09:30 +020067static int aix_magic_present(struct parsed_partitions *state, unsigned char *p)
Olaf Heringe1dfa922006-09-29 01:59:39 -070068{
Olaf Hering4419d1a2007-02-10 01:45:47 -080069 struct partition *pt = (struct partition *) (p + 0x1be);
Olaf Heringe1dfa922006-09-29 01:59:39 -070070 Sector sect;
71 unsigned char *d;
Olaf Hering4419d1a2007-02-10 01:45:47 -080072 int slot, ret = 0;
Olaf Heringe1dfa922006-09-29 01:59:39 -070073
Olaf Heringa470e182007-02-10 01:45:48 -080074 if (!(p[0] == AIX_LABEL_MAGIC1 &&
75 p[1] == AIX_LABEL_MAGIC2 &&
76 p[2] == AIX_LABEL_MAGIC3 &&
77 p[3] == AIX_LABEL_MAGIC4))
Olaf Heringe1dfa922006-09-29 01:59:39 -070078 return 0;
Olaf Hering4419d1a2007-02-10 01:45:47 -080079 /* Assume the partition table is valid if Linux partitions exists */
80 for (slot = 1; slot <= 4; slot++, pt++) {
81 if (pt->sys_ind == LINUX_SWAP_PARTITION ||
82 pt->sys_ind == LINUX_RAID_PARTITION ||
83 pt->sys_ind == LINUX_DATA_PARTITION ||
84 pt->sys_ind == LINUX_LVM_PARTITION ||
85 is_extended_partition(pt))
86 return 0;
87 }
Tejun Heo1493bf22010-05-15 20:09:30 +020088 d = read_part_sector(state, 7, &sect);
Olaf Heringe1dfa922006-09-29 01:59:39 -070089 if (d) {
90 if (d[0] == '_' && d[1] == 'L' && d[2] == 'V' && d[3] == 'M')
91 ret = 1;
92 put_dev_sector(sect);
93 };
94 return ret;
95}
96
Linus Torvalds1da177e2005-04-16 15:20:36 -070097/*
98 * Create devices for each logical partition in an extended partition.
99 * The logical partitions form a linked list, with each entry being
100 * a partition table with two entries. The first entry
101 * is the real data partition (with a start relative to the partition
102 * table start). The second is a pointer to the next logical partition
103 * (with a start relative to the entire extended partition).
104 * We do not create a Linux partition for the partition tables, but
105 * only for the actual data partitions.
106 */
107
Tejun Heo1493bf22010-05-15 20:09:30 +0200108static void parse_extended(struct parsed_partitions *state,
109 sector_t first_sector, sector_t first_size)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110{
111 struct partition *p;
112 Sector sect;
113 unsigned char *data;
Daniel Taylor3fbf5862010-03-23 13:35:50 -0700114 sector_t this_sector, this_size;
Tejun Heo1493bf22010-05-15 20:09:30 +0200115 sector_t sector_size = bdev_logical_block_size(state->bdev) / 512;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116 int loopct = 0; /* number of links followed
117 without finding a data partition */
118 int i;
119
120 this_sector = first_sector;
121 this_size = first_size;
122
123 while (1) {
124 if (++loopct > 100)
125 return;
126 if (state->next == state->limit)
127 return;
Tejun Heo1493bf22010-05-15 20:09:30 +0200128 data = read_part_sector(state, this_sector, &sect);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129 if (!data)
130 return;
131
132 if (!msdos_magic_present(data + 510))
133 goto done;
134
135 p = (struct partition *) (data + 0x1be);
136
137 /*
138 * Usually, the first entry is the real data partition,
139 * the 2nd entry is the next extended partition, or empty,
140 * and the 3rd and 4th entries are unused.
141 * However, DRDOS sometimes has the extended partition as
142 * the first entry (when the data partition is empty),
143 * and OS/2 seems to use all four entries.
144 */
145
146 /*
147 * First process the data partition(s)
148 */
149 for (i=0; i<4; i++, p++) {
Daniel Taylor3fbf5862010-03-23 13:35:50 -0700150 sector_t offs, size, next;
151 if (!nr_sects(p) || is_extended_partition(p))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152 continue;
153
154 /* Check the 3rd and 4th entries -
155 these sometimes contain random garbage */
Daniel Taylor3fbf5862010-03-23 13:35:50 -0700156 offs = start_sect(p)*sector_size;
157 size = nr_sects(p)*sector_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 next = this_sector + offs;
159 if (i >= 2) {
160 if (offs + size > this_size)
161 continue;
162 if (next < first_sector)
163 continue;
164 if (next + size > first_sector + first_size)
165 continue;
166 }
167
168 put_partition(state, state->next, next, size);
169 if (SYS_IND(p) == LINUX_RAID_PARTITION)
Fabio Massimo Di Nittod18d7682007-02-10 23:50:00 -0800170 state->parts[state->next].flags = ADDPART_FLAG_RAID;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 loopct = 0;
172 if (++state->next == state->limit)
173 goto done;
174 }
175 /*
176 * Next, process the (first) extended partition, if present.
177 * (So far, there seems to be no reason to make
178 * parse_extended() recursive and allow a tree
179 * of extended partitions.)
180 * It should be a link to the next logical partition.
181 */
182 p -= 4;
183 for (i=0; i<4; i++, p++)
Daniel Taylor3fbf5862010-03-23 13:35:50 -0700184 if (nr_sects(p) && is_extended_partition(p))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 break;
186 if (i == 4)
187 goto done; /* nothing left to do */
188
Daniel Taylor3fbf5862010-03-23 13:35:50 -0700189 this_sector = first_sector + start_sect(p) * sector_size;
190 this_size = nr_sects(p) * sector_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191 put_dev_sector(sect);
192 }
193done:
194 put_dev_sector(sect);
195}
196
197/* james@bpgc.com: Solaris has a nasty indicator: 0x82 which also
198 indicates linux swap. Be careful before believing this is Solaris. */
199
Tejun Heo1493bf22010-05-15 20:09:30 +0200200static void parse_solaris_x86(struct parsed_partitions *state,
201 sector_t offset, sector_t size, int origin)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202{
203#ifdef CONFIG_SOLARIS_X86_PARTITION
204 Sector sect;
205 struct solaris_x86_vtoc *v;
206 int i;
Mark Fortescueb84d8792007-07-25 18:30:08 -0700207 short max_nparts;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208
Tejun Heo1493bf22010-05-15 20:09:30 +0200209 v = read_part_sector(state, offset + 1, &sect);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 if (!v)
211 return;
212 if (le32_to_cpu(v->v_sanity) != SOLARIS_X86_VTOC_SANE) {
213 put_dev_sector(sect);
214 return;
215 }
216 printk(" %s%d: <solaris:", state->name, origin);
217 if (le32_to_cpu(v->v_version) != 1) {
218 printk(" cannot handle version %d vtoc>\n",
219 le32_to_cpu(v->v_version));
220 put_dev_sector(sect);
221 return;
222 }
Mark Fortescueb84d8792007-07-25 18:30:08 -0700223 /* Ensure we can handle previous case of VTOC with 8 entries gracefully */
224 max_nparts = le16_to_cpu (v->v_nparts) > 8 ? SOLARIS_X86_NUMSLICE : 8;
225 for (i=0; i<max_nparts && state->next<state->limit; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226 struct solaris_x86_slice *s = &v->v_slice[i];
227 if (s->s_size == 0)
228 continue;
229 printk(" [s%d]", i);
230 /* solaris partitions are relative to current MS-DOS
231 * one; must add the offset of the current partition */
232 put_partition(state, state->next++,
233 le32_to_cpu(s->s_start)+offset,
234 le32_to_cpu(s->s_size));
235 }
236 put_dev_sector(sect);
237 printk(" >\n");
238#endif
239}
240
Adrian Bunk486fd402005-06-25 14:58:47 -0700241#if defined(CONFIG_BSD_DISKLABEL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242/*
243 * Create devices for BSD partitions listed in a disklabel, under a
244 * dos-like partition. See parse_extended() for more information.
245 */
Tejun Heo1493bf22010-05-15 20:09:30 +0200246static void parse_bsd(struct parsed_partitions *state,
247 sector_t offset, sector_t size, int origin, char *flavour,
248 int max_partitions)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249{
250 Sector sect;
251 struct bsd_disklabel *l;
252 struct bsd_partition *p;
253
Tejun Heo1493bf22010-05-15 20:09:30 +0200254 l = read_part_sector(state, offset + 1, &sect);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 if (!l)
256 return;
257 if (le32_to_cpu(l->d_magic) != BSD_DISKMAGIC) {
258 put_dev_sector(sect);
259 return;
260 }
261 printk(" %s%d: <%s:", state->name, origin, flavour);
262
263 if (le16_to_cpu(l->d_npartitions) < max_partitions)
264 max_partitions = le16_to_cpu(l->d_npartitions);
265 for (p = l->d_partitions; p - l->d_partitions < max_partitions; p++) {
Daniel Taylor3fbf5862010-03-23 13:35:50 -0700266 sector_t bsd_start, bsd_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267
268 if (state->next == state->limit)
269 break;
270 if (p->p_fstype == BSD_FS_UNUSED)
271 continue;
272 bsd_start = le32_to_cpu(p->p_offset);
273 bsd_size = le32_to_cpu(p->p_size);
274 if (offset == bsd_start && size == bsd_size)
275 /* full parent partition, we have it already */
276 continue;
277 if (offset > bsd_start || offset+size < bsd_start+bsd_size) {
278 printk("bad subpartition - ignored\n");
279 continue;
280 }
281 put_partition(state, state->next++, bsd_start, bsd_size);
282 }
283 put_dev_sector(sect);
284 if (le16_to_cpu(l->d_npartitions) > max_partitions)
285 printk(" (ignored %d more)",
286 le16_to_cpu(l->d_npartitions) - max_partitions);
287 printk(" >\n");
288}
289#endif
290
Tejun Heo1493bf22010-05-15 20:09:30 +0200291static void parse_freebsd(struct parsed_partitions *state,
292 sector_t offset, sector_t size, int origin)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293{
294#ifdef CONFIG_BSD_DISKLABEL
Tejun Heo1493bf22010-05-15 20:09:30 +0200295 parse_bsd(state, offset, size, origin, "bsd", BSD_MAXPARTITIONS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296#endif
297}
298
Tejun Heo1493bf22010-05-15 20:09:30 +0200299static void parse_netbsd(struct parsed_partitions *state,
300 sector_t offset, sector_t size, int origin)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301{
302#ifdef CONFIG_BSD_DISKLABEL
Tejun Heo1493bf22010-05-15 20:09:30 +0200303 parse_bsd(state, offset, size, origin, "netbsd", BSD_MAXPARTITIONS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304#endif
305}
306
Tejun Heo1493bf22010-05-15 20:09:30 +0200307static void parse_openbsd(struct parsed_partitions *state,
308 sector_t offset, sector_t size, int origin)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309{
310#ifdef CONFIG_BSD_DISKLABEL
Tejun Heo1493bf22010-05-15 20:09:30 +0200311 parse_bsd(state, offset, size, origin, "openbsd",
312 OPENBSD_MAXPARTITIONS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313#endif
314}
315
316/*
317 * Create devices for Unixware partitions listed in a disklabel, under a
318 * dos-like partition. See parse_extended() for more information.
319 */
Tejun Heo1493bf22010-05-15 20:09:30 +0200320static void parse_unixware(struct parsed_partitions *state,
321 sector_t offset, sector_t size, int origin)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322{
323#ifdef CONFIG_UNIXWARE_DISKLABEL
324 Sector sect;
325 struct unixware_disklabel *l;
326 struct unixware_slice *p;
327
Tejun Heo1493bf22010-05-15 20:09:30 +0200328 l = read_part_sector(state, offset + 29, &sect);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329 if (!l)
330 return;
331 if (le32_to_cpu(l->d_magic) != UNIXWARE_DISKMAGIC ||
332 le32_to_cpu(l->vtoc.v_magic) != UNIXWARE_DISKMAGIC2) {
333 put_dev_sector(sect);
334 return;
335 }
336 printk(" %s%d: <unixware:", state->name, origin);
337 p = &l->vtoc.v_slice[1];
338 /* I omit the 0th slice as it is the same as whole disk. */
339 while (p - &l->vtoc.v_slice[0] < UNIXWARE_NUMSLICE) {
340 if (state->next == state->limit)
341 break;
342
343 if (p->s_label != UNIXWARE_FS_UNUSED)
344 put_partition(state, state->next++,
Daniel Taylor3fbf5862010-03-23 13:35:50 -0700345 le32_to_cpu(p->start_sect),
346 le32_to_cpu(p->nr_sects));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347 p++;
348 }
349 put_dev_sector(sect);
350 printk(" >\n");
351#endif
352}
353
354/*
355 * Minix 2.0.0/2.0.2 subpartition support.
356 * Anand Krishnamurthy <anandk@wiproge.med.ge.com>
357 * Rajeev V. Pillai <rajeevvp@yahoo.com>
358 */
Tejun Heo1493bf22010-05-15 20:09:30 +0200359static void parse_minix(struct parsed_partitions *state,
360 sector_t offset, sector_t size, int origin)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361{
362#ifdef CONFIG_MINIX_SUBPARTITION
363 Sector sect;
364 unsigned char *data;
365 struct partition *p;
366 int i;
367
Tejun Heo1493bf22010-05-15 20:09:30 +0200368 data = read_part_sector(state, offset, &sect);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369 if (!data)
370 return;
371
372 p = (struct partition *)(data + 0x1be);
373
374 /* The first sector of a Minix partition can have either
375 * a secondary MBR describing its subpartitions, or
376 * the normal boot sector. */
377 if (msdos_magic_present (data + 510) &&
378 SYS_IND(p) == MINIX_PARTITION) { /* subpartition table present */
379
380 printk(" %s%d: <minix:", state->name, origin);
381 for (i = 0; i < MINIX_NR_SUBPARTITIONS; i++, p++) {
382 if (state->next == state->limit)
383 break;
384 /* add each partition in use */
385 if (SYS_IND(p) == MINIX_PARTITION)
386 put_partition(state, state->next++,
Daniel Taylor3fbf5862010-03-23 13:35:50 -0700387 start_sect(p), nr_sects(p));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388 }
389 printk(" >\n");
390 }
391 put_dev_sector(sect);
392#endif /* CONFIG_MINIX_SUBPARTITION */
393}
394
395static struct {
396 unsigned char id;
Tejun Heo1493bf22010-05-15 20:09:30 +0200397 void (*parse)(struct parsed_partitions *, sector_t, sector_t, int);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398} subtypes[] = {
399 {FREEBSD_PARTITION, parse_freebsd},
400 {NETBSD_PARTITION, parse_netbsd},
401 {OPENBSD_PARTITION, parse_openbsd},
402 {MINIX_PARTITION, parse_minix},
403 {UNIXWARE_PARTITION, parse_unixware},
404 {SOLARIS_X86_PARTITION, parse_solaris_x86},
405 {NEW_SOLARIS_X86_PARTITION, parse_solaris_x86},
406 {0, NULL},
407};
408
Tejun Heo1493bf22010-05-15 20:09:30 +0200409int msdos_partition(struct parsed_partitions *state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410{
Tejun Heo1493bf22010-05-15 20:09:30 +0200411 sector_t sector_size = bdev_logical_block_size(state->bdev) / 512;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412 Sector sect;
413 unsigned char *data;
414 struct partition *p;
Frank Seidel0607fd02008-04-28 02:16:31 -0700415 struct fat_boot_sector *fb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416 int slot;
417
Tejun Heo1493bf22010-05-15 20:09:30 +0200418 data = read_part_sector(state, 0, &sect);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419 if (!data)
420 return -1;
421 if (!msdos_magic_present(data + 510)) {
422 put_dev_sector(sect);
423 return 0;
424 }
425
Tejun Heo1493bf22010-05-15 20:09:30 +0200426 if (aix_magic_present(state, data)) {
Olaf Heringe1dfa922006-09-29 01:59:39 -0700427 put_dev_sector(sect);
428 printk( " [AIX]");
429 return 0;
430 }
431
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432 /*
433 * Now that the 55aa signature is present, this is probably
434 * either the boot sector of a FAT filesystem or a DOS-type
435 * partition table. Reject this in case the boot indicator
436 * is not 0 or 0x80.
437 */
438 p = (struct partition *) (data + 0x1be);
439 for (slot = 1; slot <= 4; slot++, p++) {
440 if (p->boot_ind != 0 && p->boot_ind != 0x80) {
Frank Seidel0607fd02008-04-28 02:16:31 -0700441 /*
442 * Even without a valid boot inidicator value
443 * its still possible this is valid FAT filesystem
444 * without a partition table.
445 */
446 fb = (struct fat_boot_sector *) data;
447 if (slot == 1 && fb->reserved && fb->fats
448 && fat_valid_media(fb->media)) {
449 printk("\n");
450 put_dev_sector(sect);
451 return 1;
452 } else {
453 put_dev_sector(sect);
454 return 0;
455 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456 }
457 }
458
459#ifdef CONFIG_EFI_PARTITION
460 p = (struct partition *) (data + 0x1be);
461 for (slot = 1 ; slot <= 4 ; slot++, p++) {
462 /* If this is an EFI GPT disk, msdos should ignore it. */
463 if (SYS_IND(p) == EFI_PMBR_OSTYPE_EFI_GPT) {
464 put_dev_sector(sect);
465 return 0;
466 }
467 }
468#endif
469 p = (struct partition *) (data + 0x1be);
470
471 /*
472 * Look for partitions in two passes:
473 * First find the primary and DOS-type extended partitions.
474 * On the second pass look inside *BSD, Unixware and Solaris partitions.
475 */
476
477 state->next = 5;
478 for (slot = 1 ; slot <= 4 ; slot++, p++) {
Daniel Taylor3fbf5862010-03-23 13:35:50 -0700479 sector_t start = start_sect(p)*sector_size;
480 sector_t size = nr_sects(p)*sector_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481 if (!size)
482 continue;
483 if (is_extended_partition(p)) {
OGAWA Hirofumi8e0cc812010-03-23 13:35:50 -0700484 /*
485 * prevent someone doing mkfs or mkswap on an
486 * extended partition, but leave room for LILO
487 * FIXME: this uses one logical sector for > 512b
488 * sector, although it may not be enough/proper.
489 */
490 sector_t n = 2;
491 n = min(size, max(sector_size, n));
492 put_partition(state, slot, start, n);
493
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494 printk(" <");
Tejun Heo1493bf22010-05-15 20:09:30 +0200495 parse_extended(state, start, size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496 printk(" >");
497 continue;
498 }
499 put_partition(state, slot, start, size);
500 if (SYS_IND(p) == LINUX_RAID_PARTITION)
Cesar Eduardo Barroscc910622010-04-17 19:28:09 -0300501 state->parts[slot].flags = ADDPART_FLAG_RAID;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502 if (SYS_IND(p) == DM6_PARTITION)
503 printk("[DM]");
504 if (SYS_IND(p) == EZD_PARTITION)
505 printk("[EZD]");
506 }
507
508 printk("\n");
509
510 /* second pass - output for each on a separate line */
511 p = (struct partition *) (0x1be + data);
512 for (slot = 1 ; slot <= 4 ; slot++, p++) {
513 unsigned char id = SYS_IND(p);
514 int n;
515
Daniel Taylor3fbf5862010-03-23 13:35:50 -0700516 if (!nr_sects(p))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517 continue;
518
519 for (n = 0; subtypes[n].parse && id != subtypes[n].id; n++)
520 ;
521
522 if (!subtypes[n].parse)
523 continue;
Tejun Heo1493bf22010-05-15 20:09:30 +0200524 subtypes[n].parse(state, start_sect(p) * sector_size,
525 nr_sects(p) * sector_size, slot);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526 }
527 put_dev_sector(sect);
528 return 1;
529}