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authorLinus Torvalds <torvalds@linux-foundation.org>2012-01-08 15:19:57 -0500
committerLinus Torvalds <torvalds@linux-foundation.org>2012-01-08 15:19:57 -0500
commit972b2c719990f91eb3b2310d44ef8a2d38955a14 (patch)
treeb25a250ec5bec4b7b6355d214642d8b57c5cab32 /block
parent02550d61f49266930e674286379d3601006b2893 (diff)
parentc3aa077648e147783a7a53b409578234647db853 (diff)
Merge branch 'for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
* 'for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (165 commits) reiserfs: Properly display mount options in /proc/mounts vfs: prevent remount read-only if pending removes vfs: count unlinked inodes vfs: protect remounting superblock read-only vfs: keep list of mounts for each superblock vfs: switch ->show_options() to struct dentry * vfs: switch ->show_path() to struct dentry * vfs: switch ->show_devname() to struct dentry * vfs: switch ->show_stats to struct dentry * switch security_path_chmod() to struct path * vfs: prefer ->dentry->d_sb to ->mnt->mnt_sb vfs: trim includes a bit switch mnt_namespace ->root to struct mount vfs: take /proc/*/mounts and friends to fs/proc_namespace.c vfs: opencode mntget() mnt_set_mountpoint() vfs: spread struct mount - remaining argument of next_mnt() vfs: move fsnotify junk to struct mount vfs: move mnt_devname vfs: move mnt_list to struct mount vfs: switch pnode.h macros to struct mount * ...
Diffstat (limited to 'block')
-rw-r--r--block/Kconfig6
-rw-r--r--block/Makefile3
-rw-r--r--block/bsg.c2
-rw-r--r--block/genhd.c5
-rw-r--r--block/ioctl.c2
-rw-r--r--block/partition-generic.c537
-rw-r--r--block/partitions/Kconfig251
-rw-r--r--block/partitions/Makefile20
-rw-r--r--block/partitions/acorn.c556
-rw-r--r--block/partitions/acorn.h14
-rw-r--r--block/partitions/amiga.c139
-rw-r--r--block/partitions/amiga.h6
-rw-r--r--block/partitions/atari.c149
-rw-r--r--block/partitions/atari.h34
-rw-r--r--block/partitions/check.c166
-rw-r--r--block/partitions/check.h52
-rw-r--r--block/partitions/efi.c675
-rw-r--r--block/partitions/efi.h134
-rw-r--r--block/partitions/ibm.c275
-rw-r--r--block/partitions/ibm.h1
-rw-r--r--block/partitions/karma.c57
-rw-r--r--block/partitions/karma.h8
-rw-r--r--block/partitions/ldm.c1570
-rw-r--r--block/partitions/ldm.h215
-rw-r--r--block/partitions/mac.c134
-rw-r--r--block/partitions/mac.h44
-rw-r--r--block/partitions/msdos.c552
-rw-r--r--block/partitions/msdos.h8
-rw-r--r--block/partitions/osf.c86
-rw-r--r--block/partitions/osf.h7
-rw-r--r--block/partitions/sgi.c82
-rw-r--r--block/partitions/sgi.h8
-rw-r--r--block/partitions/sun.c122
-rw-r--r--block/partitions/sun.h8
-rw-r--r--block/partitions/sysv68.c95
-rw-r--r--block/partitions/sysv68.h1
-rw-r--r--block/partitions/ultrix.c48
-rw-r--r--block/partitions/ultrix.h5
38 files changed, 6071 insertions, 6 deletions
diff --git a/block/Kconfig b/block/Kconfig
index e97934eececa..09acf1b39905 100644
--- a/block/Kconfig
+++ b/block/Kconfig
@@ -99,6 +99,12 @@ config BLK_DEV_THROTTLING
99 99
100 See Documentation/cgroups/blkio-controller.txt for more information. 100 See Documentation/cgroups/blkio-controller.txt for more information.
101 101
102menu "Partition Types"
103
104source "block/partitions/Kconfig"
105
106endmenu
107
102endif # BLOCK 108endif # BLOCK
103 109
104config BLOCK_COMPAT 110config BLOCK_COMPAT
diff --git a/block/Makefile b/block/Makefile
index 514c6e4f427a..39b76ba66ffd 100644
--- a/block/Makefile
+++ b/block/Makefile
@@ -5,7 +5,8 @@
5obj-$(CONFIG_BLOCK) := elevator.o blk-core.o blk-tag.o blk-sysfs.o \ 5obj-$(CONFIG_BLOCK) := elevator.o blk-core.o blk-tag.o blk-sysfs.o \
6 blk-flush.o blk-settings.o blk-ioc.o blk-map.o \ 6 blk-flush.o blk-settings.o blk-ioc.o blk-map.o \
7 blk-exec.o blk-merge.o blk-softirq.o blk-timeout.o \ 7 blk-exec.o blk-merge.o blk-softirq.o blk-timeout.o \
8 blk-iopoll.o blk-lib.o ioctl.o genhd.o scsi_ioctl.o 8 blk-iopoll.o blk-lib.o ioctl.o genhd.o scsi_ioctl.o \
9 partition-generic.o partitions/
9 10
10obj-$(CONFIG_BLK_DEV_BSG) += bsg.o 11obj-$(CONFIG_BLK_DEV_BSG) += bsg.o
11obj-$(CONFIG_BLK_DEV_BSGLIB) += bsg-lib.o 12obj-$(CONFIG_BLK_DEV_BSGLIB) += bsg-lib.o
diff --git a/block/bsg.c b/block/bsg.c
index 702f1316bb8f..9651ec7b87c2 100644
--- a/block/bsg.c
+++ b/block/bsg.c
@@ -1070,7 +1070,7 @@ EXPORT_SYMBOL_GPL(bsg_register_queue);
1070 1070
1071static struct cdev bsg_cdev; 1071static struct cdev bsg_cdev;
1072 1072
1073static char *bsg_devnode(struct device *dev, mode_t *mode) 1073static char *bsg_devnode(struct device *dev, umode_t *mode)
1074{ 1074{
1075 return kasprintf(GFP_KERNEL, "bsg/%s", dev_name(dev)); 1075 return kasprintf(GFP_KERNEL, "bsg/%s", dev_name(dev));
1076} 1076}
diff --git a/block/genhd.c b/block/genhd.c
index 02e9fca80825..83e7c04015e1 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -15,7 +15,6 @@
15#include <linux/slab.h> 15#include <linux/slab.h>
16#include <linux/kmod.h> 16#include <linux/kmod.h>
17#include <linux/kobj_map.h> 17#include <linux/kobj_map.h>
18#include <linux/buffer_head.h>
19#include <linux/mutex.h> 18#include <linux/mutex.h>
20#include <linux/idr.h> 19#include <linux/idr.h>
21#include <linux/log2.h> 20#include <linux/log2.h>
@@ -507,7 +506,7 @@ static int exact_lock(dev_t devt, void *data)
507 return 0; 506 return 0;
508} 507}
509 508
510void register_disk(struct gendisk *disk) 509static void register_disk(struct gendisk *disk)
511{ 510{
512 struct device *ddev = disk_to_dev(disk); 511 struct device *ddev = disk_to_dev(disk);
513 struct block_device *bdev; 512 struct block_device *bdev;
@@ -1109,7 +1108,7 @@ struct class block_class = {
1109 .name = "block", 1108 .name = "block",
1110}; 1109};
1111 1110
1112static char *block_devnode(struct device *dev, mode_t *mode) 1111static char *block_devnode(struct device *dev, umode_t *mode)
1113{ 1112{
1114 struct gendisk *disk = dev_to_disk(dev); 1113 struct gendisk *disk = dev_to_disk(dev);
1115 1114
diff --git a/block/ioctl.c b/block/ioctl.c
index d510c2a4eff8..4828fa349813 100644
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -5,7 +5,7 @@
5#include <linux/blkpg.h> 5#include <linux/blkpg.h>
6#include <linux/hdreg.h> 6#include <linux/hdreg.h>
7#include <linux/backing-dev.h> 7#include <linux/backing-dev.h>
8#include <linux/buffer_head.h> 8#include <linux/fs.h>
9#include <linux/blktrace_api.h> 9#include <linux/blktrace_api.h>
10#include <asm/uaccess.h> 10#include <asm/uaccess.h>
11 11
diff --git a/block/partition-generic.c b/block/partition-generic.c
new file mode 100644
index 000000000000..d06ec1c829c2
--- /dev/null
+++ b/block/partition-generic.c
@@ -0,0 +1,537 @@
1/*
2 * Code extracted from drivers/block/genhd.c
3 * Copyright (C) 1991-1998 Linus Torvalds
4 * Re-organised Feb 1998 Russell King
5 *
6 * We now have independent partition support from the
7 * block drivers, which allows all the partition code to
8 * be grouped in one location, and it to be mostly self
9 * contained.
10 */
11
12#include <linux/init.h>
13#include <linux/module.h>
14#include <linux/fs.h>
15#include <linux/slab.h>
16#include <linux/kmod.h>
17#include <linux/ctype.h>
18#include <linux/genhd.h>
19#include <linux/blktrace_api.h>
20
21#include "partitions/check.h"
22
23#ifdef CONFIG_BLK_DEV_MD
24extern void md_autodetect_dev(dev_t dev);
25#endif
26
27/*
28 * disk_name() is used by partition check code and the genhd driver.
29 * It formats the devicename of the indicated disk into
30 * the supplied buffer (of size at least 32), and returns
31 * a pointer to that same buffer (for convenience).
32 */
33
34char *disk_name(struct gendisk *hd, int partno, char *buf)
35{
36 if (!partno)
37 snprintf(buf, BDEVNAME_SIZE, "%s", hd->disk_name);
38 else if (isdigit(hd->disk_name[strlen(hd->disk_name)-1]))
39 snprintf(buf, BDEVNAME_SIZE, "%sp%d", hd->disk_name, partno);
40 else
41 snprintf(buf, BDEVNAME_SIZE, "%s%d", hd->disk_name, partno);
42
43 return buf;
44}
45
46const char *bdevname(struct block_device *bdev, char *buf)
47{
48 return disk_name(bdev->bd_disk, bdev->bd_part->partno, buf);
49}
50
51EXPORT_SYMBOL(bdevname);
52
53/*
54 * There's very little reason to use this, you should really
55 * have a struct block_device just about everywhere and use
56 * bdevname() instead.
57 */
58const char *__bdevname(dev_t dev, char *buffer)
59{
60 scnprintf(buffer, BDEVNAME_SIZE, "unknown-block(%u,%u)",
61 MAJOR(dev), MINOR(dev));
62 return buffer;
63}
64
65EXPORT_SYMBOL(__bdevname);
66
67static ssize_t part_partition_show(struct device *dev,
68 struct device_attribute *attr, char *buf)
69{
70 struct hd_struct *p = dev_to_part(dev);
71
72 return sprintf(buf, "%d\n", p->partno);
73}
74
75static ssize_t part_start_show(struct device *dev,
76 struct device_attribute *attr, char *buf)
77{
78 struct hd_struct *p = dev_to_part(dev);
79
80 return sprintf(buf, "%llu\n",(unsigned long long)p->start_sect);
81}
82
83ssize_t part_size_show(struct device *dev,
84 struct device_attribute *attr, char *buf)
85{
86 struct hd_struct *p = dev_to_part(dev);
87 return sprintf(buf, "%llu\n",(unsigned long long)p->nr_sects);
88}
89
90static ssize_t part_ro_show(struct device *dev,
91 struct device_attribute *attr, char *buf)
92{
93 struct hd_struct *p = dev_to_part(dev);
94 return sprintf(buf, "%d\n", p->policy ? 1 : 0);
95}
96
97static ssize_t part_alignment_offset_show(struct device *dev,
98 struct device_attribute *attr, char *buf)
99{
100 struct hd_struct *p = dev_to_part(dev);
101 return sprintf(buf, "%llu\n", (unsigned long long)p->alignment_offset);
102}
103
104static ssize_t part_discard_alignment_show(struct device *dev,
105 struct device_attribute *attr, char *buf)
106{
107 struct hd_struct *p = dev_to_part(dev);
108 return sprintf(buf, "%u\n", p->discard_alignment);
109}
110
111ssize_t part_stat_show(struct device *dev,
112 struct device_attribute *attr, char *buf)
113{
114 struct hd_struct *p = dev_to_part(dev);
115 int cpu;
116
117 cpu = part_stat_lock();
118 part_round_stats(cpu, p);
119 part_stat_unlock();
120 return sprintf(buf,
121 "%8lu %8lu %8llu %8u "
122 "%8lu %8lu %8llu %8u "
123 "%8u %8u %8u"
124 "\n",
125 part_stat_read(p, ios[READ]),
126 part_stat_read(p, merges[READ]),
127 (unsigned long long)part_stat_read(p, sectors[READ]),
128 jiffies_to_msecs(part_stat_read(p, ticks[READ])),
129 part_stat_read(p, ios[WRITE]),
130 part_stat_read(p, merges[WRITE]),
131 (unsigned long long)part_stat_read(p, sectors[WRITE]),
132 jiffies_to_msecs(part_stat_read(p, ticks[WRITE])),
133 part_in_flight(p),
134 jiffies_to_msecs(part_stat_read(p, io_ticks)),
135 jiffies_to_msecs(part_stat_read(p, time_in_queue)));
136}
137
138ssize_t part_inflight_show(struct device *dev,
139 struct device_attribute *attr, char *buf)
140{
141 struct hd_struct *p = dev_to_part(dev);
142
143 return sprintf(buf, "%8u %8u\n", atomic_read(&p->in_flight[0]),
144 atomic_read(&p->in_flight[1]));
145}
146
147#ifdef CONFIG_FAIL_MAKE_REQUEST
148ssize_t part_fail_show(struct device *dev,
149 struct device_attribute *attr, char *buf)
150{
151 struct hd_struct *p = dev_to_part(dev);
152
153 return sprintf(buf, "%d\n", p->make_it_fail);
154}
155
156ssize_t part_fail_store(struct device *dev,
157 struct device_attribute *attr,
158 const char *buf, size_t count)
159{
160 struct hd_struct *p = dev_to_part(dev);
161 int i;
162
163 if (count > 0 && sscanf(buf, "%d", &i) > 0)
164 p->make_it_fail = (i == 0) ? 0 : 1;
165
166 return count;
167}
168#endif
169
170static DEVICE_ATTR(partition, S_IRUGO, part_partition_show, NULL);
171static DEVICE_ATTR(start, S_IRUGO, part_start_show, NULL);
172static DEVICE_ATTR(size, S_IRUGO, part_size_show, NULL);
173static DEVICE_ATTR(ro, S_IRUGO, part_ro_show, NULL);
174static DEVICE_ATTR(alignment_offset, S_IRUGO, part_alignment_offset_show, NULL);
175static DEVICE_ATTR(discard_alignment, S_IRUGO, part_discard_alignment_show,
176 NULL);
177static DEVICE_ATTR(stat, S_IRUGO, part_stat_show, NULL);
178static DEVICE_ATTR(inflight, S_IRUGO, part_inflight_show, NULL);
179#ifdef CONFIG_FAIL_MAKE_REQUEST
180static struct device_attribute dev_attr_fail =
181 __ATTR(make-it-fail, S_IRUGO|S_IWUSR, part_fail_show, part_fail_store);
182#endif
183
184static struct attribute *part_attrs[] = {
185 &dev_attr_partition.attr,
186 &dev_attr_start.attr,
187 &dev_attr_size.attr,
188 &dev_attr_ro.attr,
189 &dev_attr_alignment_offset.attr,
190 &dev_attr_discard_alignment.attr,
191 &dev_attr_stat.attr,
192 &dev_attr_inflight.attr,
193#ifdef CONFIG_FAIL_MAKE_REQUEST
194 &dev_attr_fail.attr,
195#endif
196 NULL
197};
198
199static struct attribute_group part_attr_group = {
200 .attrs = part_attrs,
201};
202
203static const struct attribute_group *part_attr_groups[] = {
204 &part_attr_group,
205#ifdef CONFIG_BLK_DEV_IO_TRACE
206 &blk_trace_attr_group,
207#endif
208 NULL
209};
210
211static void part_release(struct device *dev)
212{
213 struct hd_struct *p = dev_to_part(dev);
214 free_part_stats(p);
215 free_part_info(p);
216 kfree(p);
217}
218
219struct device_type part_type = {
220 .name = "partition",
221 .groups = part_attr_groups,
222 .release = part_release,
223};
224
225static void delete_partition_rcu_cb(struct rcu_head *head)
226{
227 struct hd_struct *part = container_of(head, struct hd_struct, rcu_head);
228
229 part->start_sect = 0;
230 part->nr_sects = 0;
231 part_stat_set_all(part, 0);
232 put_device(part_to_dev(part));
233}
234
235void __delete_partition(struct hd_struct *part)
236{
237 call_rcu(&part->rcu_head, delete_partition_rcu_cb);
238}
239
240void delete_partition(struct gendisk *disk, int partno)
241{
242 struct disk_part_tbl *ptbl = disk->part_tbl;
243 struct hd_struct *part;
244
245 if (partno >= ptbl->len)
246 return;
247
248 part = ptbl->part[partno];
249 if (!part)
250 return;
251
252 blk_free_devt(part_devt(part));
253 rcu_assign_pointer(ptbl->part[partno], NULL);
254 rcu_assign_pointer(ptbl->last_lookup, NULL);
255 kobject_put(part->holder_dir);
256 device_del(part_to_dev(part));
257
258 hd_struct_put(part);
259}
260
261static ssize_t whole_disk_show(struct device *dev,
262 struct device_attribute *attr, char *buf)
263{
264 return 0;
265}
266static DEVICE_ATTR(whole_disk, S_IRUSR | S_IRGRP | S_IROTH,
267 whole_disk_show, NULL);
268
269struct hd_struct *add_partition(struct gendisk *disk, int partno,
270 sector_t start, sector_t len, int flags,
271 struct partition_meta_info *info)
272{
273 struct hd_struct *p;
274 dev_t devt = MKDEV(0, 0);
275 struct device *ddev = disk_to_dev(disk);
276 struct device *pdev;
277 struct disk_part_tbl *ptbl;
278 const char *dname;
279 int err;
280
281 err = disk_expand_part_tbl(disk, partno);
282 if (err)
283 return ERR_PTR(err);
284 ptbl = disk->part_tbl;
285
286 if (ptbl->part[partno])
287 return ERR_PTR(-EBUSY);
288
289 p = kzalloc(sizeof(*p), GFP_KERNEL);
290 if (!p)
291 return ERR_PTR(-EBUSY);
292
293 if (!init_part_stats(p)) {
294 err = -ENOMEM;
295 goto out_free;
296 }
297 pdev = part_to_dev(p);
298
299 p->start_sect = start;
300 p->alignment_offset =
301 queue_limit_alignment_offset(&disk->queue->limits, start);
302 p->discard_alignment =
303 queue_limit_discard_alignment(&disk->queue->limits, start);
304 p->nr_sects = len;
305 p->partno = partno;
306 p->policy = get_disk_ro(disk);
307
308 if (info) {
309 struct partition_meta_info *pinfo = alloc_part_info(disk);
310 if (!pinfo)
311 goto out_free_stats;
312 memcpy(pinfo, info, sizeof(*info));
313 p->info = pinfo;
314 }
315
316 dname = dev_name(ddev);
317 if (isdigit(dname[strlen(dname) - 1]))
318 dev_set_name(pdev, "%sp%d", dname, partno);
319 else
320 dev_set_name(pdev, "%s%d", dname, partno);
321
322 device_initialize(pdev);
323 pdev->class = &block_class;
324 pdev->type = &part_type;
325 pdev->parent = ddev;
326
327 err = blk_alloc_devt(p, &devt);
328 if (err)
329 goto out_free_info;
330 pdev->devt = devt;
331
332 /* delay uevent until 'holders' subdir is created */
333 dev_set_uevent_suppress(pdev, 1);
334 err = device_add(pdev);
335 if (err)
336 goto out_put;
337
338 err = -ENOMEM;
339 p->holder_dir = kobject_create_and_add("holders", &pdev->kobj);
340 if (!p->holder_dir)
341 goto out_del;
342
343 dev_set_uevent_suppress(pdev, 0);
344 if (flags & ADDPART_FLAG_WHOLEDISK) {
345 err = device_create_file(pdev, &dev_attr_whole_disk);
346 if (err)
347 goto out_del;
348 }
349
350 /* everything is up and running, commence */
351 rcu_assign_pointer(ptbl->part[partno], p);
352
353 /* suppress uevent if the disk suppresses it */
354 if (!dev_get_uevent_suppress(ddev))
355 kobject_uevent(&pdev->kobj, KOBJ_ADD);
356
357 hd_ref_init(p);
358 return p;
359
360out_free_info:
361 free_part_info(p);
362out_free_stats:
363 free_part_stats(p);
364out_free:
365 kfree(p);
366 return ERR_PTR(err);
367out_del:
368 kobject_put(p->holder_dir);
369 device_del(pdev);
370out_put:
371 put_device(pdev);
372 blk_free_devt(devt);
373 return ERR_PTR(err);
374}
375
376static bool disk_unlock_native_capacity(struct gendisk *disk)
377{
378 const struct block_device_operations *bdops = disk->fops;
379
380 if (bdops->unlock_native_capacity &&
381 !(disk->flags & GENHD_FL_NATIVE_CAPACITY)) {
382 printk(KERN_CONT "enabling native capacity\n");
383 bdops->unlock_native_capacity(disk);
384 disk->flags |= GENHD_FL_NATIVE_CAPACITY;
385 return true;
386 } else {
387 printk(KERN_CONT "truncated\n");
388 return false;
389 }
390}
391
392int rescan_partitions(struct gendisk *disk, struct block_device *bdev)
393{
394 struct parsed_partitions *state = NULL;
395 struct disk_part_iter piter;
396 struct hd_struct *part;
397 int p, highest, res;
398rescan:
399 if (state && !IS_ERR(state)) {
400 kfree(state);
401 state = NULL;
402 }
403
404 if (bdev->bd_part_count)
405 return -EBUSY;
406 res = invalidate_partition(disk, 0);
407 if (res)
408 return res;
409
410 disk_part_iter_init(&piter, disk, DISK_PITER_INCL_EMPTY);
411 while ((part = disk_part_iter_next(&piter)))
412 delete_partition(disk, part->partno);
413 disk_part_iter_exit(&piter);
414
415 if (disk->fops->revalidate_disk)
416 disk->fops->revalidate_disk(disk);
417 check_disk_size_change(disk, bdev);
418 bdev->bd_invalidated = 0;
419 if (!get_capacity(disk) || !(state = check_partition(disk, bdev)))
420 return 0;
421 if (IS_ERR(state)) {
422 /*
423 * I/O error reading the partition table. If any
424 * partition code tried to read beyond EOD, retry
425 * after unlocking native capacity.
426 */
427 if (PTR_ERR(state) == -ENOSPC) {
428 printk(KERN_WARNING "%s: partition table beyond EOD, ",
429 disk->disk_name);
430 if (disk_unlock_native_capacity(disk))
431 goto rescan;
432 }
433 return -EIO;
434 }
435 /*
436 * If any partition code tried to read beyond EOD, try
437 * unlocking native capacity even if partition table is
438 * successfully read as we could be missing some partitions.
439 */
440 if (state->access_beyond_eod) {
441 printk(KERN_WARNING
442 "%s: partition table partially beyond EOD, ",
443 disk->disk_name);
444 if (disk_unlock_native_capacity(disk))
445 goto rescan;
446 }
447
448 /* tell userspace that the media / partition table may have changed */
449 kobject_uevent(&disk_to_dev(disk)->kobj, KOBJ_CHANGE);
450
451 /* Detect the highest partition number and preallocate
452 * disk->part_tbl. This is an optimization and not strictly
453 * necessary.
454 */
455 for (p = 1, highest = 0; p < state->limit; p++)
456 if (state->parts[p].size)
457 highest = p;
458
459 disk_expand_part_tbl(disk, highest);
460
461 /* add partitions */
462 for (p = 1; p < state->limit; p++) {
463 sector_t size, from;
464 struct partition_meta_info *info = NULL;
465
466 size = state->parts[p].size;
467 if (!size)
468 continue;
469
470 from = state->parts[p].from;
471 if (from >= get_capacity(disk)) {
472 printk(KERN_WARNING
473 "%s: p%d start %llu is beyond EOD, ",
474 disk->disk_name, p, (unsigned long long) from);
475 if (disk_unlock_native_capacity(disk))
476 goto rescan;
477 continue;
478 }
479
480 if (from + size > get_capacity(disk)) {
481 printk(KERN_WARNING
482 "%s: p%d size %llu extends beyond EOD, ",
483 disk->disk_name, p, (unsigned long long) size);
484
485 if (disk_unlock_native_capacity(disk)) {
486 /* free state and restart */
487 goto rescan;
488 } else {
489 /*
490 * we can not ignore partitions of broken tables
491 * created by for example camera firmware, but
492 * we limit them to the end of the disk to avoid
493 * creating invalid block devices
494 */
495 size = get_capacity(disk) - from;
496 }
497 }
498
499 if (state->parts[p].has_info)
500 info = &state->parts[p].info;
501 part = add_partition(disk, p, from, size,
502 state->parts[p].flags,
503 &state->parts[p].info);
504 if (IS_ERR(part)) {
505 printk(KERN_ERR " %s: p%d could not be added: %ld\n",
506 disk->disk_name, p, -PTR_ERR(part));
507 continue;
508 }
509#ifdef CONFIG_BLK_DEV_MD
510 if (state->parts[p].flags & ADDPART_FLAG_RAID)
511 md_autodetect_dev(part_to_dev(part)->devt);
512#endif
513 }
514 kfree(state);
515 return 0;
516}
517
518unsigned char *read_dev_sector(struct block_device *bdev, sector_t n, Sector *p)
519{
520 struct address_space *mapping = bdev->bd_inode->i_mapping;
521 struct page *page;
522
523 page = read_mapping_page(mapping, (pgoff_t)(n >> (PAGE_CACHE_SHIFT-9)),
524 NULL);
525 if (!IS_ERR(page)) {
526 if (PageError(page))
527 goto fail;
528 p->v = page;
529 return (unsigned char *)page_address(page) + ((n & ((1 << (PAGE_CACHE_SHIFT - 9)) - 1)) << 9);
530fail:
531 page_cache_release(page);
532 }
533 p->v = NULL;
534 return NULL;
535}
536
537EXPORT_SYMBOL(read_dev_sector);
diff --git a/block/partitions/Kconfig b/block/partitions/Kconfig
new file mode 100644
index 000000000000..cb5f0a3f1b03
--- /dev/null
+++ b/block/partitions/Kconfig
@@ -0,0 +1,251 @@
1#
2# Partition configuration
3#
4config PARTITION_ADVANCED
5 bool "Advanced partition selection"
6 help
7 Say Y here if you would like to use hard disks under Linux which
8 were partitioned under an operating system running on a different
9 architecture than your Linux system.
10
11 Note that the answer to this question won't directly affect the
12 kernel: saying N will just cause the configurator to skip all
13 the questions about foreign partitioning schemes.
14
15 If unsure, say N.
16
17config ACORN_PARTITION
18 bool "Acorn partition support" if PARTITION_ADVANCED
19 default y if ARCH_ACORN
20 help
21 Support hard disks partitioned under Acorn operating systems.
22
23config ACORN_PARTITION_CUMANA
24 bool "Cumana partition support" if PARTITION_ADVANCED
25 default y if ARCH_ACORN
26 depends on ACORN_PARTITION
27 help
28 Say Y here if you would like to use hard disks under Linux which
29 were partitioned using the Cumana interface on Acorn machines.
30
31config ACORN_PARTITION_EESOX
32 bool "EESOX partition support" if PARTITION_ADVANCED
33 default y if ARCH_ACORN
34 depends on ACORN_PARTITION
35
36config ACORN_PARTITION_ICS
37 bool "ICS partition support" if PARTITION_ADVANCED
38 default y if ARCH_ACORN
39 depends on ACORN_PARTITION
40 help
41 Say Y here if you would like to use hard disks under Linux which
42 were partitioned using the ICS interface on Acorn machines.
43
44config ACORN_PARTITION_ADFS
45 bool "Native filecore partition support" if PARTITION_ADVANCED
46 default y if ARCH_ACORN
47 depends on ACORN_PARTITION
48 help
49 The Acorn Disc Filing System is the standard file system of the
50 RiscOS operating system which runs on Acorn's ARM-based Risc PC
51 systems and the Acorn Archimedes range of machines. If you say
52 `Y' here, Linux will support disk partitions created under ADFS.
53
54config ACORN_PARTITION_POWERTEC
55 bool "PowerTec partition support" if PARTITION_ADVANCED
56 default y if ARCH_ACORN
57 depends on ACORN_PARTITION
58 help
59 Support reading partition tables created on Acorn machines using
60 the PowerTec SCSI drive.
61
62config ACORN_PARTITION_RISCIX
63 bool "RISCiX partition support" if PARTITION_ADVANCED
64 default y if ARCH_ACORN
65 depends on ACORN_PARTITION
66 help
67 Once upon a time, there was a native Unix port for the Acorn series
68 of machines called RISCiX. If you say 'Y' here, Linux will be able
69 to read disks partitioned under RISCiX.
70
71config OSF_PARTITION
72 bool "Alpha OSF partition support" if PARTITION_ADVANCED
73 default y if ALPHA
74 help
75 Say Y here if you would like to use hard disks under Linux which
76 were partitioned on an Alpha machine.
77
78config AMIGA_PARTITION
79 bool "Amiga partition table support" if PARTITION_ADVANCED
80 default y if (AMIGA || AFFS_FS=y)
81 help
82 Say Y here if you would like to use hard disks under Linux which
83 were partitioned under AmigaOS.
84
85config ATARI_PARTITION
86 bool "Atari partition table support" if PARTITION_ADVANCED
87 default y if ATARI
88 help
89 Say Y here if you would like to use hard disks under Linux which
90 were partitioned under the Atari OS.
91
92config IBM_PARTITION
93 bool "IBM disk label and partition support"
94 depends on PARTITION_ADVANCED && S390
95 help
96 Say Y here if you would like to be able to read the hard disk
97 partition table format used by IBM DASD disks operating under CMS.
98 Otherwise, say N.
99
100config MAC_PARTITION
101 bool "Macintosh partition map support" if PARTITION_ADVANCED
102 default y if (MAC || PPC_PMAC)
103 help
104 Say Y here if you would like to use hard disks under Linux which
105 were partitioned on a Macintosh.
106
107config MSDOS_PARTITION
108 bool "PC BIOS (MSDOS partition tables) support" if PARTITION_ADVANCED
109 default y
110 help
111 Say Y here.
112
113config BSD_DISKLABEL
114 bool "BSD disklabel (FreeBSD partition tables) support"
115 depends on PARTITION_ADVANCED && MSDOS_PARTITION
116 help
117 FreeBSD uses its own hard disk partition scheme on your PC. It
118 requires only one entry in the primary partition table of your disk
119 and manages it similarly to DOS extended partitions, putting in its
120 first sector a new partition table in BSD disklabel format. Saying Y
121 here allows you to read these disklabels and further mount FreeBSD
122 partitions from within Linux if you have also said Y to "UFS
123 file system support", above. If you don't know what all this is
124 about, say N.
125
126config MINIX_SUBPARTITION
127 bool "Minix subpartition support"
128 depends on PARTITION_ADVANCED && MSDOS_PARTITION
129 help
130 Minix 2.0.0/2.0.2 subpartition table support for Linux.
131 Say Y here if you want to mount and use Minix 2.0.0/2.0.2
132 subpartitions.
133
134config SOLARIS_X86_PARTITION
135 bool "Solaris (x86) partition table support"
136 depends on PARTITION_ADVANCED && MSDOS_PARTITION
137 help
138 Like most systems, Solaris x86 uses its own hard disk partition
139 table format, incompatible with all others. Saying Y here allows you
140 to read these partition tables and further mount Solaris x86
141 partitions from within Linux if you have also said Y to "UFS
142 file system support", above.
143
144config UNIXWARE_DISKLABEL
145 bool "Unixware slices support"
146 depends on PARTITION_ADVANCED && MSDOS_PARTITION
147 ---help---
148 Like some systems, UnixWare uses its own slice table inside a
149 partition (VTOC - Virtual Table of Contents). Its format is
150 incompatible with all other OSes. Saying Y here allows you to read
151 VTOC and further mount UnixWare partitions read-only from within
152 Linux if you have also said Y to "UFS file system support" or
153 "System V and Coherent file system support", above.
154
155 This is mainly used to carry data from a UnixWare box to your
156 Linux box via a removable medium like magneto-optical, ZIP or
157 removable IDE drives. Note, however, that a good portable way to
158 transport files and directories between unixes (and even other
159 operating systems) is given by the tar program ("man tar" or
160 preferably "info tar").
161
162 If you don't know what all this is about, say N.
163
164config LDM_PARTITION
165 bool "Windows Logical Disk Manager (Dynamic Disk) support"
166 depends on PARTITION_ADVANCED
167 ---help---
168 Say Y here if you would like to use hard disks under Linux which
169 were partitioned using Windows 2000's/XP's or Vista's Logical Disk
170 Manager. They are also known as "Dynamic Disks".
171
172 Note this driver only supports Dynamic Disks with a protective MBR
173 label, i.e. DOS partition table. It does not support GPT labelled
174 Dynamic Disks yet as can be created with Vista.
175
176 Windows 2000 introduced the concept of Dynamic Disks to get around
177 the limitations of the PC's partitioning scheme. The Logical Disk
178 Manager allows the user to repartition a disk and create spanned,
179 mirrored, striped or RAID volumes, all without the need for
180 rebooting.
181
182 Normal partitions are now called Basic Disks under Windows 2000, XP,
183 and Vista.
184
185 For a fuller description read <file:Documentation/ldm.txt>.
186
187 If unsure, say N.
188
189config LDM_DEBUG
190 bool "Windows LDM extra logging"
191 depends on LDM_PARTITION
192 help
193 Say Y here if you would like LDM to log verbosely. This could be
194 helpful if the driver doesn't work as expected and you'd like to
195 report a bug.
196
197 If unsure, say N.
198
199config SGI_PARTITION
200 bool "SGI partition support" if PARTITION_ADVANCED
201 default y if DEFAULT_SGI_PARTITION
202 help
203 Say Y here if you would like to be able to read the hard disk
204 partition table format used by SGI machines.
205
206config ULTRIX_PARTITION
207 bool "Ultrix partition table support" if PARTITION_ADVANCED
208 default y if MACH_DECSTATION
209 help
210 Say Y here if you would like to be able to read the hard disk
211 partition table format used by DEC (now Compaq) Ultrix machines.
212 Otherwise, say N.
213
214config SUN_PARTITION
215 bool "Sun partition tables support" if PARTITION_ADVANCED
216 default y if (SPARC || SUN3 || SUN3X)
217 ---help---
218 Like most systems, SunOS uses its own hard disk partition table
219 format, incompatible with all others. Saying Y here allows you to
220 read these partition tables and further mount SunOS partitions from
221 within Linux if you have also said Y to "UFS file system support",
222 above. This is mainly used to carry data from a SPARC under SunOS to
223 your Linux box via a removable medium like magneto-optical or ZIP
224 drives; note however that a good portable way to transport files and
225 directories between unixes (and even other operating systems) is
226 given by the tar program ("man tar" or preferably "info tar"). If
227 you don't know what all this is about, say N.
228
229config KARMA_PARTITION
230 bool "Karma Partition support"
231 depends on PARTITION_ADVANCED
232 help
233 Say Y here if you would like to mount the Rio Karma MP3 player, as it
234 uses a proprietary partition table.
235
236config EFI_PARTITION
237 bool "EFI GUID Partition support"
238 depends on PARTITION_ADVANCED
239 select CRC32
240 help
241 Say Y here if you would like to use hard disks under Linux which
242 were partitioned using EFI GPT.
243
244config SYSV68_PARTITION
245 bool "SYSV68 partition table support" if PARTITION_ADVANCED
246 default y if VME
247 help
248 Say Y here if you would like to be able to read the hard disk
249 partition table format used by Motorola Delta machines (using
250 sysv68).
251 Otherwise, say N.
diff --git a/block/partitions/Makefile b/block/partitions/Makefile
new file mode 100644
index 000000000000..03af8eac51da
--- /dev/null
+++ b/block/partitions/Makefile
@@ -0,0 +1,20 @@
1#
2# Makefile for the linux kernel.
3#
4
5obj-$(CONFIG_BLOCK) := check.o
6
7obj-$(CONFIG_ACORN_PARTITION) += acorn.o
8obj-$(CONFIG_AMIGA_PARTITION) += amiga.o
9obj-$(CONFIG_ATARI_PARTITION) += atari.o
10obj-$(CONFIG_MAC_PARTITION) += mac.o
11obj-$(CONFIG_LDM_PARTITION) += ldm.o
12obj-$(CONFIG_MSDOS_PARTITION) += msdos.o
13obj-$(CONFIG_OSF_PARTITION) += osf.o
14obj-$(CONFIG_SGI_PARTITION) += sgi.o
15obj-$(CONFIG_SUN_PARTITION) += sun.o
16obj-$(CONFIG_ULTRIX_PARTITION) += ultrix.o
17obj-$(CONFIG_IBM_PARTITION) += ibm.o
18obj-$(CONFIG_EFI_PARTITION) += efi.o
19obj-$(CONFIG_KARMA_PARTITION) += karma.o
20obj-$(CONFIG_SYSV68_PARTITION) += sysv68.o
diff --git a/block/partitions/acorn.c b/block/partitions/acorn.c
new file mode 100644
index 000000000000..fbeb697374d5
--- /dev/null
+++ b/block/partitions/acorn.c
@@ -0,0 +1,556 @@
1/*
2 * linux/fs/partitions/acorn.c
3 *
4 * Copyright (c) 1996-2000 Russell King.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 * Scan ADFS partitions on hard disk drives. Unfortunately, there
11 * isn't a standard for partitioning drives on Acorn machines, so
12 * every single manufacturer of SCSI and IDE cards created their own
13 * method.
14 */
15#include <linux/buffer_head.h>
16#include <linux/adfs_fs.h>
17
18#include "check.h"
19#include "acorn.h"
20
21/*
22 * Partition types. (Oh for reusability)
23 */
24#define PARTITION_RISCIX_MFM 1
25#define PARTITION_RISCIX_SCSI 2
26#define PARTITION_LINUX 9
27
28#if defined(CONFIG_ACORN_PARTITION_CUMANA) || \
29 defined(CONFIG_ACORN_PARTITION_ADFS)
30static struct adfs_discrecord *
31adfs_partition(struct parsed_partitions *state, char *name, char *data,
32 unsigned long first_sector, int slot)
33{
34 struct adfs_discrecord *dr;
35 unsigned int nr_sects;
36
37 if (adfs_checkbblk(data))
38 return NULL;
39
40 dr = (struct adfs_discrecord *)(data + 0x1c0);
41
42 if (dr->disc_size == 0 && dr->disc_size_high == 0)
43 return NULL;
44
45 nr_sects = (le32_to_cpu(dr->disc_size_high) << 23) |
46 (le32_to_cpu(dr->disc_size) >> 9);
47
48 if (name) {
49 strlcat(state->pp_buf, " [", PAGE_SIZE);
50 strlcat(state->pp_buf, name, PAGE_SIZE);
51 strlcat(state->pp_buf, "]", PAGE_SIZE);
52 }
53 put_partition(state, slot, first_sector, nr_sects);
54 return dr;
55}
56#endif
57
58#ifdef CONFIG_ACORN_PARTITION_RISCIX
59
60struct riscix_part {
61 __le32 start;
62 __le32 length;
63 __le32 one;
64 char name[16];
65};
66
67struct riscix_record {
68 __le32 magic;
69#define RISCIX_MAGIC cpu_to_le32(0x4a657320)
70 __le32 date;
71 struct riscix_part part[8];
72};
73
74#if defined(CONFIG_ACORN_PARTITION_CUMANA) || \
75 defined(CONFIG_ACORN_PARTITION_ADFS)
76static int riscix_partition(struct parsed_partitions *state,
77 unsigned long first_sect, int slot,
78 unsigned long nr_sects)
79{
80 Sector sect;
81 struct riscix_record *rr;
82
83 rr = read_part_sector(state, first_sect, &sect);
84 if (!rr)
85 return -1;
86
87 strlcat(state->pp_buf, " [RISCiX]", PAGE_SIZE);
88
89
90 if (rr->magic == RISCIX_MAGIC) {
91 unsigned long size = nr_sects > 2 ? 2 : nr_sects;
92 int part;
93
94 strlcat(state->pp_buf, " <", PAGE_SIZE);
95
96 put_partition(state, slot++, first_sect, size);
97 for (part = 0; part < 8; part++) {
98 if (rr->part[part].one &&
99 memcmp(rr->part[part].name, "All\0", 4)) {
100 put_partition(state, slot++,
101 le32_to_cpu(rr->part[part].start),
102 le32_to_cpu(rr->part[part].length));
103 strlcat(state->pp_buf, "(", PAGE_SIZE);
104 strlcat(state->pp_buf, rr->part[part].name, PAGE_SIZE);
105 strlcat(state->pp_buf, ")", PAGE_SIZE);
106 }
107 }
108
109 strlcat(state->pp_buf, " >\n", PAGE_SIZE);
110 } else {
111 put_partition(state, slot++, first_sect, nr_sects);
112 }
113
114 put_dev_sector(sect);
115 return slot;
116}
117#endif
118#endif
119
120#define LINUX_NATIVE_MAGIC 0xdeafa1de
121#define LINUX_SWAP_MAGIC 0xdeafab1e
122
123struct linux_part {
124 __le32 magic;
125 __le32 start_sect;
126 __le32 nr_sects;
127};
128
129#if defined(CONFIG_ACORN_PARTITION_CUMANA) || \
130 defined(CONFIG_ACORN_PARTITION_ADFS)
131static int linux_partition(struct parsed_partitions *state,
132 unsigned long first_sect, int slot,
133 unsigned long nr_sects)
134{
135 Sector sect;
136 struct linux_part *linuxp;
137 unsigned long size = nr_sects > 2 ? 2 : nr_sects;
138
139 strlcat(state->pp_buf, " [Linux]", PAGE_SIZE);
140
141 put_partition(state, slot++, first_sect, size);
142
143 linuxp = read_part_sector(state, first_sect, &sect);
144 if (!linuxp)
145 return -1;
146
147 strlcat(state->pp_buf, " <", PAGE_SIZE);
148 while (linuxp->magic == cpu_to_le32(LINUX_NATIVE_MAGIC) ||
149 linuxp->magic == cpu_to_le32(LINUX_SWAP_MAGIC)) {
150 if (slot == state->limit)
151 break;
152 put_partition(state, slot++, first_sect +
153 le32_to_cpu(linuxp->start_sect),
154 le32_to_cpu(linuxp->nr_sects));
155 linuxp ++;
156 }
157 strlcat(state->pp_buf, " >", PAGE_SIZE);
158
159 put_dev_sector(sect);
160 return slot;
161}
162#endif
163
164#ifdef CONFIG_ACORN_PARTITION_CUMANA
165int adfspart_check_CUMANA(struct parsed_partitions *state)
166{
167 unsigned long first_sector = 0;
168 unsigned int start_blk = 0;
169 Sector sect;
170 unsigned char *data;
171 char *name = "CUMANA/ADFS";
172 int first = 1;
173 int slot = 1;
174
175 /*
176 * Try Cumana style partitions - sector 6 contains ADFS boot block
177 * with pointer to next 'drive'.
178 *
179 * There are unknowns in this code - is the 'cylinder number' of the
180 * next partition relative to the start of this one - I'm assuming
181 * it is.
182 *
183 * Also, which ID did Cumana use?
184 *
185 * This is totally unfinished, and will require more work to get it
186 * going. Hence it is totally untested.
187 */
188 do {
189 struct adfs_discrecord *dr;
190 unsigned int nr_sects;
191
192 data = read_part_sector(state, start_blk * 2 + 6, &sect);
193 if (!data)
194 return -1;
195
196 if (slot == state->limit)
197 break;
198
199 dr = adfs_partition(state, name, data, first_sector, slot++);
200 if (!dr)
201 break;
202
203 name = NULL;
204
205 nr_sects = (data[0x1fd] + (data[0x1fe] << 8)) *
206 (dr->heads + (dr->lowsector & 0x40 ? 1 : 0)) *
207 dr->secspertrack;
208
209 if (!nr_sects)
210 break;
211
212 first = 0;
213 first_sector += nr_sects;
214 start_blk += nr_sects >> (BLOCK_SIZE_BITS - 9);
215 nr_sects = 0; /* hmm - should be partition size */
216
217 switch (data[0x1fc] & 15) {
218 case 0: /* No partition / ADFS? */
219 break;
220
221#ifdef CONFIG_ACORN_PARTITION_RISCIX
222 case PARTITION_RISCIX_SCSI:
223 /* RISCiX - we don't know how to find the next one. */
224 slot = riscix_partition(state, first_sector, slot,
225 nr_sects);
226 break;
227#endif
228
229 case PARTITION_LINUX:
230 slot = linux_partition(state, first_sector, slot,
231 nr_sects);
232 break;
233 }
234 put_dev_sector(sect);
235 if (slot == -1)
236 return -1;
237 } while (1);
238 put_dev_sector(sect);
239 return first ? 0 : 1;
240}
241#endif
242
243#ifdef CONFIG_ACORN_PARTITION_ADFS
244/*
245 * Purpose: allocate ADFS partitions.
246 *
247 * Params : hd - pointer to gendisk structure to store partition info.
248 * dev - device number to access.
249 *
250 * Returns: -1 on error, 0 for no ADFS boot sector, 1 for ok.
251 *
252 * Alloc : hda = whole drive
253 * hda1 = ADFS partition on first drive.
254 * hda2 = non-ADFS partition.
255 */
256int adfspart_check_ADFS(struct parsed_partitions *state)
257{
258 unsigned long start_sect, nr_sects, sectscyl, heads;
259 Sector sect;
260 unsigned char *data;
261 struct adfs_discrecord *dr;
262 unsigned char id;
263 int slot = 1;
264
265 data = read_part_sector(state, 6, &sect);
266 if (!data)
267 return -1;
268
269 dr = adfs_partition(state, "ADFS", data, 0, slot++);
270 if (!dr) {
271 put_dev_sector(sect);
272 return 0;
273 }
274
275 heads = dr->heads + ((dr->lowsector >> 6) & 1);
276 sectscyl = dr->secspertrack * heads;
277 start_sect = ((data[0x1fe] << 8) + data[0x1fd]) * sectscyl;
278 id = data[0x1fc] & 15;
279 put_dev_sector(sect);
280
281 /*
282 * Work out start of non-adfs partition.
283 */
284 nr_sects = (state->bdev->bd_inode->i_size >> 9) - start_sect;
285
286 if (start_sect) {
287 switch (id) {
288#ifdef CONFIG_ACORN_PARTITION_RISCIX
289 case PARTITION_RISCIX_SCSI:
290 case PARTITION_RISCIX_MFM:
291 slot = riscix_partition(state, start_sect, slot,
292 nr_sects);
293 break;
294#endif
295
296 case PARTITION_LINUX:
297 slot = linux_partition(state, start_sect, slot,
298 nr_sects);
299 break;
300 }
301 }
302 strlcat(state->pp_buf, "\n", PAGE_SIZE);
303 return 1;
304}
305#endif
306
307#ifdef CONFIG_ACORN_PARTITION_ICS
308
309struct ics_part {
310 __le32 start;
311 __le32 size;
312};
313
314static int adfspart_check_ICSLinux(struct parsed_partitions *state,
315 unsigned long block)
316{
317 Sector sect;
318 unsigned char *data = read_part_sector(state, block, &sect);
319 int result = 0;
320
321 if (data) {
322 if (memcmp(data, "LinuxPart", 9) == 0)
323 result = 1;
324 put_dev_sector(sect);
325 }
326
327 return result;
328}
329
330/*
331 * Check for a valid ICS partition using the checksum.
332 */
333static inline int valid_ics_sector(const unsigned char *data)
334{
335 unsigned long sum;
336 int i;
337
338 for (i = 0, sum = 0x50617274; i < 508; i++)
339 sum += data[i];
340
341 sum -= le32_to_cpu(*(__le32 *)(&data[508]));
342
343 return sum == 0;
344}
345
346/*
347 * Purpose: allocate ICS partitions.
348 * Params : hd - pointer to gendisk structure to store partition info.
349 * dev - device number to access.
350 * Returns: -1 on error, 0 for no ICS table, 1 for partitions ok.
351 * Alloc : hda = whole drive
352 * hda1 = ADFS partition 0 on first drive.
353 * hda2 = ADFS partition 1 on first drive.
354 * ..etc..
355 */
356int adfspart_check_ICS(struct parsed_partitions *state)
357{
358 const unsigned char *data;
359 const struct ics_part *p;
360 int slot;
361 Sector sect;
362
363 /*
364 * Try ICS style partitions - sector 0 contains partition info.
365 */
366 data = read_part_sector(state, 0, &sect);
367 if (!data)
368 return -1;
369
370 if (!valid_ics_sector(data)) {
371 put_dev_sector(sect);
372 return 0;
373 }
374
375 strlcat(state->pp_buf, " [ICS]", PAGE_SIZE);
376
377 for (slot = 1, p = (const struct ics_part *)data; p->size; p++) {
378 u32 start = le32_to_cpu(p->start);
379 s32 size = le32_to_cpu(p->size); /* yes, it's signed. */
380
381 if (slot == state->limit)
382 break;
383
384 /*
385 * Negative sizes tell the RISC OS ICS driver to ignore
386 * this partition - in effect it says that this does not
387 * contain an ADFS filesystem.
388 */
389 if (size < 0) {
390 size = -size;
391
392 /*
393 * Our own extension - We use the first sector
394 * of the partition to identify what type this
395 * partition is. We must not make this visible
396 * to the filesystem.
397 */
398 if (size > 1 && adfspart_check_ICSLinux(state, start)) {
399 start += 1;
400 size -= 1;
401 }
402 }
403
404 if (size)
405 put_partition(state, slot++, start, size);
406 }
407
408 put_dev_sector(sect);
409 strlcat(state->pp_buf, "\n", PAGE_SIZE);
410 return 1;
411}
412#endif
413
414#ifdef CONFIG_ACORN_PARTITION_POWERTEC
415struct ptec_part {
416 __le32 unused1;
417 __le32 unused2;
418 __le32 start;
419 __le32 size;
420 __le32 unused5;
421 char type[8];
422};
423
424static inline int valid_ptec_sector(const unsigned char *data)
425{
426 unsigned char checksum = 0x2a;
427 int i;
428
429 /*
430 * If it looks like a PC/BIOS partition, then it
431 * probably isn't PowerTec.
432 */
433 if (data[510] == 0x55 && data[511] == 0xaa)
434 return 0;
435
436 for (i = 0; i < 511; i++)
437 checksum += data[i];
438
439 return checksum == data[511];
440}
441
442/*
443 * Purpose: allocate ICS partitions.
444 * Params : hd - pointer to gendisk structure to store partition info.
445 * dev - device number to access.
446 * Returns: -1 on error, 0 for no ICS table, 1 for partitions ok.
447 * Alloc : hda = whole drive
448 * hda1 = ADFS partition 0 on first drive.
449 * hda2 = ADFS partition 1 on first drive.
450 * ..etc..
451 */
452int adfspart_check_POWERTEC(struct parsed_partitions *state)
453{
454 Sector sect;
455 const unsigned char *data;
456 const struct ptec_part *p;
457 int slot = 1;
458 int i;
459
460 data = read_part_sector(state, 0, &sect);
461 if (!data)
462 return -1;
463
464 if (!valid_ptec_sector(data)) {
465 put_dev_sector(sect);
466 return 0;
467 }
468
469 strlcat(state->pp_buf, " [POWERTEC]", PAGE_SIZE);
470
471 for (i = 0, p = (const struct ptec_part *)data; i < 12; i++, p++) {
472 u32 start = le32_to_cpu(p->start);
473 u32 size = le32_to_cpu(p->size);
474
475 if (size)
476 put_partition(state, slot++, start, size);
477 }
478
479 put_dev_sector(sect);
480 strlcat(state->pp_buf, "\n", PAGE_SIZE);
481 return 1;
482}
483#endif
484
485#ifdef CONFIG_ACORN_PARTITION_EESOX
486struct eesox_part {
487 char magic[6];
488 char name[10];
489 __le32 start;
490 __le32 unused6;
491 __le32 unused7;
492 __le32 unused8;
493};
494
495/*
496 * Guess who created this format?
497 */
498static const char eesox_name[] = {
499 'N', 'e', 'i', 'l', ' ',
500 'C', 'r', 'i', 't', 'c', 'h', 'e', 'l', 'l', ' ', ' '
501};
502
503/*
504 * EESOX SCSI partition format.
505 *
506 * This is a goddamned awful partition format. We don't seem to store
507 * the size of the partition in this table, only the start addresses.
508 *
509 * There are two possibilities where the size comes from:
510 * 1. The individual ADFS boot block entries that are placed on the disk.
511 * 2. The start address of the next entry.
512 */
513int adfspart_check_EESOX(struct parsed_partitions *state)
514{
515 Sector sect;
516 const unsigned char *data;
517 unsigned char buffer[256];
518 struct eesox_part *p;
519 sector_t start = 0;
520 int i, slot = 1;
521
522 data = read_part_sector(state, 7, &sect);
523 if (!data)
524 return -1;
525
526 /*
527 * "Decrypt" the partition table. God knows why...
528 */
529 for (i = 0; i < 256; i++)
530 buffer[i] = data[i] ^ eesox_name[i & 15];
531
532 put_dev_sector(sect);
533
534 for (i = 0, p = (struct eesox_part *)buffer; i < 8; i++, p++) {
535 sector_t next;
536
537 if (memcmp(p->magic, "Eesox", 6))
538 break;
539
540 next = le32_to_cpu(p->start);
541 if (i)
542 put_partition(state, slot++, start, next - start);
543 start = next;
544 }
545
546 if (i != 0) {
547 sector_t size;
548
549 size = get_capacity(state->bdev->bd_disk);
550 put_partition(state, slot++, start, size - start);
551 strlcat(state->pp_buf, "\n", PAGE_SIZE);
552 }
553
554 return i ? 1 : 0;
555}
556#endif
diff --git a/block/partitions/acorn.h b/block/partitions/acorn.h
new file mode 100644
index 000000000000..ede828529692
--- /dev/null
+++ b/block/partitions/acorn.h
@@ -0,0 +1,14 @@
1/*
2 * linux/fs/partitions/acorn.h
3 *
4 * Copyright (C) 1996-2001 Russell King.
5 *
6 * I _hate_ this partitioning mess - why can't we have one defined
7 * format, and everyone stick to it?
8 */
9
10int adfspart_check_CUMANA(struct parsed_partitions *state);
11int adfspart_check_ADFS(struct parsed_partitions *state);
12int adfspart_check_ICS(struct parsed_partitions *state);
13int adfspart_check_POWERTEC(struct parsed_partitions *state);
14int adfspart_check_EESOX(struct parsed_partitions *state);
diff --git a/block/partitions/amiga.c b/block/partitions/amiga.c
new file mode 100644
index 000000000000..70cbf44a1560
--- /dev/null
+++ b/block/partitions/amiga.c
@@ -0,0 +1,139 @@
1/*
2 * fs/partitions/amiga.c
3 *
4 * Code extracted from drivers/block/genhd.c
5 *
6 * Copyright (C) 1991-1998 Linus Torvalds
7 * Re-organised Feb 1998 Russell King
8 */
9
10#include <linux/types.h>
11#include <linux/affs_hardblocks.h>
12
13#include "check.h"
14#include "amiga.h"
15
16static __inline__ u32
17checksum_block(__be32 *m, int size)
18{
19 u32 sum = 0;
20
21 while (size--)
22 sum += be32_to_cpu(*m++);
23 return sum;
24}
25
26int amiga_partition(struct parsed_partitions *state)
27{
28 Sector sect;
29 unsigned char *data;
30 struct RigidDiskBlock *rdb;
31 struct PartitionBlock *pb;
32 int start_sect, nr_sects, blk, part, res = 0;
33 int blksize = 1; /* Multiplier for disk block size */
34 int slot = 1;
35 char b[BDEVNAME_SIZE];
36
37 for (blk = 0; ; blk++, put_dev_sector(sect)) {
38 if (blk == RDB_ALLOCATION_LIMIT)
39 goto rdb_done;
40 data = read_part_sector(state, blk, &sect);
41 if (!data) {
42 if (warn_no_part)
43 printk("Dev %s: unable to read RDB block %d\n",
44 bdevname(state->bdev, b), blk);
45 res = -1;
46 goto rdb_done;
47 }
48 if (*(__be32 *)data != cpu_to_be32(IDNAME_RIGIDDISK))
49 continue;
50
51 rdb = (struct RigidDiskBlock *)data;
52 if (checksum_block((__be32 *)data, be32_to_cpu(rdb->rdb_SummedLongs) & 0x7F) == 0)
53 break;
54 /* Try again with 0xdc..0xdf zeroed, Windows might have
55 * trashed it.
56 */
57 *(__be32 *)(data+0xdc) = 0;
58 if (checksum_block((__be32 *)data,
59 be32_to_cpu(rdb->rdb_SummedLongs) & 0x7F)==0) {
60 printk("Warning: Trashed word at 0xd0 in block %d "
61 "ignored in checksum calculation\n",blk);
62 break;
63 }
64
65 printk("Dev %s: RDB in block %d has bad checksum\n",
66 bdevname(state->bdev, b), blk);
67 }
68
69 /* blksize is blocks per 512 byte standard block */
70 blksize = be32_to_cpu( rdb->rdb_BlockBytes ) / 512;
71
72 {
73 char tmp[7 + 10 + 1 + 1];
74
75 /* Be more informative */
76 snprintf(tmp, sizeof(tmp), " RDSK (%d)", blksize * 512);
77 strlcat(state->pp_buf, tmp, PAGE_SIZE);
78 }
79 blk = be32_to_cpu(rdb->rdb_PartitionList);
80 put_dev_sector(sect);
81 for (part = 1; blk>0 && part<=16; part++, put_dev_sector(sect)) {
82 blk *= blksize; /* Read in terms partition table understands */
83 data = read_part_sector(state, blk, &sect);
84 if (!data) {
85 if (warn_no_part)
86 printk("Dev %s: unable to read partition block %d\n",
87 bdevname(state->bdev, b), blk);
88 res = -1;
89 goto rdb_done;
90 }
91 pb = (struct PartitionBlock *)data;
92 blk = be32_to_cpu(pb->pb_Next);
93 if (pb->pb_ID != cpu_to_be32(IDNAME_PARTITION))
94 continue;
95 if (checksum_block((__be32 *)pb, be32_to_cpu(pb->pb_SummedLongs) & 0x7F) != 0 )
96 continue;
97
98 /* Tell Kernel about it */
99
100 nr_sects = (be32_to_cpu(pb->pb_Environment[10]) + 1 -
101 be32_to_cpu(pb->pb_Environment[9])) *
102 be32_to_cpu(pb->pb_Environment[3]) *
103 be32_to_cpu(pb->pb_Environment[5]) *
104 blksize;
105 if (!nr_sects)
106 continue;
107 start_sect = be32_to_cpu(pb->pb_Environment[9]) *
108 be32_to_cpu(pb->pb_Environment[3]) *
109 be32_to_cpu(pb->pb_Environment[5]) *
110 blksize;
111 put_partition(state,slot++,start_sect,nr_sects);
112 {
113 /* Be even more informative to aid mounting */
114 char dostype[4];
115 char tmp[42];
116
117 __be32 *dt = (__be32 *)dostype;
118 *dt = pb->pb_Environment[16];
119 if (dostype[3] < ' ')
120 snprintf(tmp, sizeof(tmp), " (%c%c%c^%c)",
121 dostype[0], dostype[1],
122 dostype[2], dostype[3] + '@' );
123 else
124 snprintf(tmp, sizeof(tmp), " (%c%c%c%c)",
125 dostype[0], dostype[1],
126 dostype[2], dostype[3]);
127 strlcat(state->pp_buf, tmp, PAGE_SIZE);
128 snprintf(tmp, sizeof(tmp), "(res %d spb %d)",
129 be32_to_cpu(pb->pb_Environment[6]),
130 be32_to_cpu(pb->pb_Environment[4]));
131 strlcat(state->pp_buf, tmp, PAGE_SIZE);
132 }
133 res = 1;
134 }
135 strlcat(state->pp_buf, "\n", PAGE_SIZE);
136
137rdb_done:
138 return res;
139}
diff --git a/block/partitions/amiga.h b/block/partitions/amiga.h
new file mode 100644
index 000000000000..d094585cadaa
--- /dev/null
+++ b/block/partitions/amiga.h
@@ -0,0 +1,6 @@
1/*
2 * fs/partitions/amiga.h
3 */
4
5int amiga_partition(struct parsed_partitions *state);
6
diff --git a/block/partitions/atari.c b/block/partitions/atari.c
new file mode 100644
index 000000000000..9875b05e80a2
--- /dev/null
+++ b/block/partitions/atari.c
@@ -0,0 +1,149 @@
1/*
2 * fs/partitions/atari.c
3 *
4 * Code extracted from drivers/block/genhd.c
5 *
6 * Copyright (C) 1991-1998 Linus Torvalds
7 * Re-organised Feb 1998 Russell King
8 */
9
10#include <linux/ctype.h>
11#include "check.h"
12#include "atari.h"
13
14/* ++guenther: this should be settable by the user ("make config")?.
15 */
16#define ICD_PARTS
17
18/* check if a partition entry looks valid -- Atari format is assumed if at
19 least one of the primary entries is ok this way */
20#define VALID_PARTITION(pi,hdsiz) \
21 (((pi)->flg & 1) && \
22 isalnum((pi)->id[0]) && isalnum((pi)->id[1]) && isalnum((pi)->id[2]) && \
23 be32_to_cpu((pi)->st) <= (hdsiz) && \
24 be32_to_cpu((pi)->st) + be32_to_cpu((pi)->siz) <= (hdsiz))
25
26static inline int OK_id(char *s)
27{
28 return memcmp (s, "GEM", 3) == 0 || memcmp (s, "BGM", 3) == 0 ||
29 memcmp (s, "LNX", 3) == 0 || memcmp (s, "SWP", 3) == 0 ||
30 memcmp (s, "RAW", 3) == 0 ;
31}
32
33int atari_partition(struct parsed_partitions *state)
34{
35 Sector sect;
36 struct rootsector *rs;
37 struct partition_info *pi;
38 u32 extensect;
39 u32 hd_size;
40 int slot;
41#ifdef ICD_PARTS
42 int part_fmt = 0; /* 0:unknown, 1:AHDI, 2:ICD/Supra */
43#endif
44
45 rs = read_part_sector(state, 0, &sect);
46 if (!rs)
47 return -1;
48
49 /* Verify this is an Atari rootsector: */
50 hd_size = state->bdev->bd_inode->i_size >> 9;
51 if (!VALID_PARTITION(&rs->part[0], hd_size) &&
52 !VALID_PARTITION(&rs->part[1], hd_size) &&
53 !VALID_PARTITION(&rs->part[2], hd_size) &&
54 !VALID_PARTITION(&rs->part[3], hd_size)) {
55 /*
56 * if there's no valid primary partition, assume that no Atari
57 * format partition table (there's no reliable magic or the like
58 * :-()
59 */
60 put_dev_sector(sect);
61 return 0;
62 }
63
64 pi = &rs->part[0];
65 strlcat(state->pp_buf, " AHDI", PAGE_SIZE);
66 for (slot = 1; pi < &rs->part[4] && slot < state->limit; slot++, pi++) {
67 struct rootsector *xrs;
68 Sector sect2;
69 ulong partsect;
70
71 if ( !(pi->flg & 1) )
72 continue;
73 /* active partition */
74 if (memcmp (pi->id, "XGM", 3) != 0) {
75 /* we don't care about other id's */
76 put_partition (state, slot, be32_to_cpu(pi->st),
77 be32_to_cpu(pi->siz));
78 continue;
79 }
80 /* extension partition */
81#ifdef ICD_PARTS
82 part_fmt = 1;
83#endif
84 strlcat(state->pp_buf, " XGM<", PAGE_SIZE);
85 partsect = extensect = be32_to_cpu(pi->st);
86 while (1) {
87 xrs = read_part_sector(state, partsect, &sect2);
88 if (!xrs) {
89 printk (" block %ld read failed\n", partsect);
90 put_dev_sector(sect);
91 return -1;
92 }
93
94 /* ++roman: sanity check: bit 0 of flg field must be set */
95 if (!(xrs->part[0].flg & 1)) {
96 printk( "\nFirst sub-partition in extended partition is not valid!\n" );
97 put_dev_sector(sect2);
98 break;
99 }
100
101 put_partition(state, slot,
102 partsect + be32_to_cpu(xrs->part[0].st),
103 be32_to_cpu(xrs->part[0].siz));
104
105 if (!(xrs->part[1].flg & 1)) {
106 /* end of linked partition list */
107 put_dev_sector(sect2);
108 break;
109 }
110 if (memcmp( xrs->part[1].id, "XGM", 3 ) != 0) {
111 printk("\nID of extended partition is not XGM!\n");
112 put_dev_sector(sect2);
113 break;
114 }
115
116 partsect = be32_to_cpu(xrs->part[1].st) + extensect;
117 put_dev_sector(sect2);
118 if (++slot == state->limit) {
119 printk( "\nMaximum number of partitions reached!\n" );
120 break;
121 }
122 }
123 strlcat(state->pp_buf, " >", PAGE_SIZE);
124 }
125#ifdef ICD_PARTS
126 if ( part_fmt!=1 ) { /* no extended partitions -> test ICD-format */
127 pi = &rs->icdpart[0];
128 /* sanity check: no ICD format if first partition invalid */
129 if (OK_id(pi->id)) {
130 strlcat(state->pp_buf, " ICD<", PAGE_SIZE);
131 for (; pi < &rs->icdpart[8] && slot < state->limit; slot++, pi++) {
132 /* accept only GEM,BGM,RAW,LNX,SWP partitions */
133 if (!((pi->flg & 1) && OK_id(pi->id)))
134 continue;
135 part_fmt = 2;
136 put_partition (state, slot,
137 be32_to_cpu(pi->st),
138 be32_to_cpu(pi->siz));
139 }
140 strlcat(state->pp_buf, " >", PAGE_SIZE);
141 }
142 }
143#endif
144 put_dev_sector(sect);
145
146 strlcat(state->pp_buf, "\n", PAGE_SIZE);
147
148 return 1;
149}
diff --git a/block/partitions/atari.h b/block/partitions/atari.h
new file mode 100644
index 000000000000..fe2d32a89f36
--- /dev/null
+++ b/block/partitions/atari.h
@@ -0,0 +1,34 @@
1/*
2 * fs/partitions/atari.h
3 * Moved by Russell King from:
4 *
5 * linux/include/linux/atari_rootsec.h
6 * definitions for Atari Rootsector layout
7 * by Andreas Schwab (schwab@ls5.informatik.uni-dortmund.de)
8 *
9 * modified for ICD/Supra partitioning scheme restricted to at most 12
10 * partitions
11 * by Guenther Kelleter (guenther@pool.informatik.rwth-aachen.de)
12 */
13
14struct partition_info
15{
16 u8 flg; /* bit 0: active; bit 7: bootable */
17 char id[3]; /* "GEM", "BGM", "XGM", or other */
18 __be32 st; /* start of partition */
19 __be32 siz; /* length of partition */
20};
21
22struct rootsector
23{
24 char unused[0x156]; /* room for boot code */
25 struct partition_info icdpart[8]; /* info for ICD-partitions 5..12 */
26 char unused2[0xc];
27 u32 hd_siz; /* size of disk in blocks */
28 struct partition_info part[4];
29 u32 bsl_st; /* start of bad sector list */
30 u32 bsl_cnt; /* length of bad sector list */
31 u16 checksum; /* checksum for bootable disks */
32} __attribute__((__packed__));
33
34int atari_partition(struct parsed_partitions *state);
diff --git a/block/partitions/check.c b/block/partitions/check.c
new file mode 100644
index 000000000000..bc908672c976
--- /dev/null
+++ b/block/partitions/check.c
@@ -0,0 +1,166 @@
1/*
2 * fs/partitions/check.c
3 *
4 * Code extracted from drivers/block/genhd.c
5 * Copyright (C) 1991-1998 Linus Torvalds
6 * Re-organised Feb 1998 Russell King
7 *
8 * We now have independent partition support from the
9 * block drivers, which allows all the partition code to
10 * be grouped in one location, and it to be mostly self
11 * contained.
12 *
13 * Added needed MAJORS for new pairs, {hdi,hdj}, {hdk,hdl}
14 */
15
16#include <linux/slab.h>
17#include <linux/ctype.h>
18#include <linux/genhd.h>
19
20#include "check.h"
21
22#include "acorn.h"
23#include "amiga.h"
24#include "atari.h"
25#include "ldm.h"
26#include "mac.h"
27#include "msdos.h"
28#include "osf.h"
29#include "sgi.h"
30#include "sun.h"
31#include "ibm.h"
32#include "ultrix.h"
33#include "efi.h"
34#include "karma.h"
35#include "sysv68.h"
36
37int warn_no_part = 1; /*This is ugly: should make genhd removable media aware*/
38
39static int (*check_part[])(struct parsed_partitions *) = {
40 /*
41 * Probe partition formats with tables at disk address 0
42 * that also have an ADFS boot block at 0xdc0.
43 */
44#ifdef CONFIG_ACORN_PARTITION_ICS
45 adfspart_check_ICS,
46#endif
47#ifdef CONFIG_ACORN_PARTITION_POWERTEC
48 adfspart_check_POWERTEC,
49#endif
50#ifdef CONFIG_ACORN_PARTITION_EESOX
51 adfspart_check_EESOX,
52#endif
53
54 /*
55 * Now move on to formats that only have partition info at
56 * disk address 0xdc0. Since these may also have stale
57 * PC/BIOS partition tables, they need to come before
58 * the msdos entry.
59 */
60#ifdef CONFIG_ACORN_PARTITION_CUMANA
61 adfspart_check_CUMANA,
62#endif
63#ifdef CONFIG_ACORN_PARTITION_ADFS
64 adfspart_check_ADFS,
65#endif
66
67#ifdef CONFIG_EFI_PARTITION
68 efi_partition, /* this must come before msdos */
69#endif
70#ifdef CONFIG_SGI_PARTITION
71 sgi_partition,
72#endif
73#ifdef CONFIG_LDM_PARTITION
74 ldm_partition, /* this must come before msdos */
75#endif
76#ifdef CONFIG_MSDOS_PARTITION
77 msdos_partition,
78#endif
79#ifdef CONFIG_OSF_PARTITION
80 osf_partition,
81#endif
82#ifdef CONFIG_SUN_PARTITION
83 sun_partition,
84#endif
85#ifdef CONFIG_AMIGA_PARTITION
86 amiga_partition,
87#endif
88#ifdef CONFIG_ATARI_PARTITION
89 atari_partition,
90#endif
91#ifdef CONFIG_MAC_PARTITION
92 mac_partition,
93#endif
94#ifdef CONFIG_ULTRIX_PARTITION
95 ultrix_partition,
96#endif
97#ifdef CONFIG_IBM_PARTITION
98 ibm_partition,
99#endif
100#ifdef CONFIG_KARMA_PARTITION
101 karma_partition,
102#endif
103#ifdef CONFIG_SYSV68_PARTITION
104 sysv68_partition,
105#endif
106 NULL
107};
108
109struct parsed_partitions *
110check_partition(struct gendisk *hd, struct block_device *bdev)
111{
112 struct parsed_partitions *state;
113 int i, res, err;
114
115 state = kzalloc(sizeof(struct parsed_partitions), GFP_KERNEL);
116 if (!state)
117 return NULL;
118 state->pp_buf = (char *)__get_free_page(GFP_KERNEL);
119 if (!state->pp_buf) {
120 kfree(state);
121 return NULL;
122 }
123 state->pp_buf[0] = '\0';
124
125 state->bdev = bdev;
126 disk_name(hd, 0, state->name);
127 snprintf(state->pp_buf, PAGE_SIZE, " %s:", state->name);
128 if (isdigit(state->name[strlen(state->name)-1]))
129 sprintf(state->name, "p");
130
131 state->limit = disk_max_parts(hd);
132 i = res = err = 0;
133 while (!res && check_part[i]) {
134 memset(&state->parts, 0, sizeof(state->parts));
135 res = check_part[i++](state);
136 if (res < 0) {
137 /* We have hit an I/O error which we don't report now.
138 * But record it, and let the others do their job.
139 */
140 err = res;
141 res = 0;
142 }
143
144 }
145 if (res > 0) {
146 printk(KERN_INFO "%s", state->pp_buf);
147
148 free_page((unsigned long)state->pp_buf);
149 return state;
150 }
151 if (state->access_beyond_eod)
152 err = -ENOSPC;
153 if (err)
154 /* The partition is unrecognized. So report I/O errors if there were any */
155 res = err;
156 if (!res)
157 strlcat(state->pp_buf, " unknown partition table\n", PAGE_SIZE);
158 else if (warn_no_part)
159 strlcat(state->pp_buf, " unable to read partition table\n", PAGE_SIZE);
160
161 printk(KERN_INFO "%s", state->pp_buf);
162
163 free_page((unsigned long)state->pp_buf);
164 kfree(state);
165 return ERR_PTR(res);
166}
diff --git a/block/partitions/check.h b/block/partitions/check.h
new file mode 100644
index 000000000000..52b100311ec3
--- /dev/null
+++ b/block/partitions/check.h
@@ -0,0 +1,52 @@
1#include <linux/pagemap.h>
2#include <linux/blkdev.h>
3#include <linux/genhd.h>
4
5/*
6 * add_gd_partition adds a partitions details to the devices partition
7 * description.
8 */
9struct parsed_partitions {
10 struct block_device *bdev;
11 char name[BDEVNAME_SIZE];
12 struct {
13 sector_t from;
14 sector_t size;
15 int flags;
16 bool has_info;
17 struct partition_meta_info info;
18 } parts[DISK_MAX_PARTS];
19 int next;
20 int limit;
21 bool access_beyond_eod;
22 char *pp_buf;
23};
24
25struct parsed_partitions *
26check_partition(struct gendisk *, struct block_device *);
27
28static inline void *read_part_sector(struct parsed_partitions *state,
29 sector_t n, Sector *p)
30{
31 if (n >= get_capacity(state->bdev->bd_disk)) {
32 state->access_beyond_eod = true;
33 return NULL;
34 }
35 return read_dev_sector(state->bdev, n, p);
36}
37
38static inline void
39put_partition(struct parsed_partitions *p, int n, sector_t from, sector_t size)
40{
41 if (n < p->limit) {
42 char tmp[1 + BDEVNAME_SIZE + 10 + 1];
43
44 p->parts[n].from = from;
45 p->parts[n].size = size;
46 snprintf(tmp, sizeof(tmp), " %s%d", p->name, n);
47 strlcat(p->pp_buf, tmp, PAGE_SIZE);
48 }
49}
50
51extern int warn_no_part;
52
diff --git a/block/partitions/efi.c b/block/partitions/efi.c
new file mode 100644
index 000000000000..6296b403c67a
--- /dev/null
+++ b/block/partitions/efi.c
@@ -0,0 +1,675 @@
1/************************************************************
2 * EFI GUID Partition Table handling
3 *
4 * http://www.uefi.org/specs/
5 * http://www.intel.com/technology/efi/
6 *
7 * efi.[ch] by Matt Domsch <Matt_Domsch@dell.com>
8 * Copyright 2000,2001,2002,2004 Dell Inc.
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 *
24 *
25 * TODO:
26 *
27 * Changelog:
28 * Mon Nov 09 2004 Matt Domsch <Matt_Domsch@dell.com>
29 * - test for valid PMBR and valid PGPT before ever reading
30 * AGPT, allow override with 'gpt' kernel command line option.
31 * - check for first/last_usable_lba outside of size of disk
32 *
33 * Tue Mar 26 2002 Matt Domsch <Matt_Domsch@dell.com>
34 * - Ported to 2.5.7-pre1 and 2.5.7-dj2
35 * - Applied patch to avoid fault in alternate header handling
36 * - cleaned up find_valid_gpt
37 * - On-disk structure and copy in memory is *always* LE now -
38 * swab fields as needed
39 * - remove print_gpt_header()
40 * - only use first max_p partition entries, to keep the kernel minor number
41 * and partition numbers tied.
42 *
43 * Mon Feb 04 2002 Matt Domsch <Matt_Domsch@dell.com>
44 * - Removed __PRIPTR_PREFIX - not being used
45 *
46 * Mon Jan 14 2002 Matt Domsch <Matt_Domsch@dell.com>
47 * - Ported to 2.5.2-pre11 + library crc32 patch Linus applied
48 *
49 * Thu Dec 6 2001 Matt Domsch <Matt_Domsch@dell.com>
50 * - Added compare_gpts().
51 * - moved le_efi_guid_to_cpus() back into this file. GPT is the only
52 * thing that keeps EFI GUIDs on disk.
53 * - Changed gpt structure names and members to be simpler and more Linux-like.
54 *
55 * Wed Oct 17 2001 Matt Domsch <Matt_Domsch@dell.com>
56 * - Removed CONFIG_DEVFS_VOLUMES_UUID code entirely per Martin Wilck
57 *
58 * Wed Oct 10 2001 Matt Domsch <Matt_Domsch@dell.com>
59 * - Changed function comments to DocBook style per Andreas Dilger suggestion.
60 *
61 * Mon Oct 08 2001 Matt Domsch <Matt_Domsch@dell.com>
62 * - Change read_lba() to use the page cache per Al Viro's work.
63 * - print u64s properly on all architectures
64 * - fixed debug_printk(), now Dprintk()
65 *
66 * Mon Oct 01 2001 Matt Domsch <Matt_Domsch@dell.com>
67 * - Style cleanups
68 * - made most functions static
69 * - Endianness addition
70 * - remove test for second alternate header, as it's not per spec,
71 * and is unnecessary. There's now a method to read/write the last
72 * sector of an odd-sized disk from user space. No tools have ever
73 * been released which used this code, so it's effectively dead.
74 * - Per Asit Mallick of Intel, added a test for a valid PMBR.
75 * - Added kernel command line option 'gpt' to override valid PMBR test.
76 *
77 * Wed Jun 6 2001 Martin Wilck <Martin.Wilck@Fujitsu-Siemens.com>
78 * - added devfs volume UUID support (/dev/volumes/uuids) for
79 * mounting file systems by the partition GUID.
80 *
81 * Tue Dec 5 2000 Matt Domsch <Matt_Domsch@dell.com>
82 * - Moved crc32() to linux/lib, added efi_crc32().
83 *
84 * Thu Nov 30 2000 Matt Domsch <Matt_Domsch@dell.com>
85 * - Replaced Intel's CRC32 function with an equivalent
86 * non-license-restricted version.
87 *
88 * Wed Oct 25 2000 Matt Domsch <Matt_Domsch@dell.com>
89 * - Fixed the last_lba() call to return the proper last block
90 *
91 * Thu Oct 12 2000 Matt Domsch <Matt_Domsch@dell.com>
92 * - Thanks to Andries Brouwer for his debugging assistance.
93 * - Code works, detects all the partitions.
94 *
95 ************************************************************/
96#include <linux/crc32.h>
97#include <linux/ctype.h>
98#include <linux/math64.h>
99#include <linux/slab.h>
100#include "check.h"
101#include "efi.h"
102
103/* This allows a kernel command line option 'gpt' to override
104 * the test for invalid PMBR. Not __initdata because reloading
105 * the partition tables happens after init too.
106 */
107static int force_gpt;
108static int __init
109force_gpt_fn(char *str)
110{
111 force_gpt = 1;
112 return 1;
113}
114__setup("gpt", force_gpt_fn);
115
116
117/**
118 * efi_crc32() - EFI version of crc32 function
119 * @buf: buffer to calculate crc32 of
120 * @len - length of buf
121 *
122 * Description: Returns EFI-style CRC32 value for @buf
123 *
124 * This function uses the little endian Ethernet polynomial
125 * but seeds the function with ~0, and xor's with ~0 at the end.
126 * Note, the EFI Specification, v1.02, has a reference to
127 * Dr. Dobbs Journal, May 1994 (actually it's in May 1992).
128 */
129static inline u32
130efi_crc32(const void *buf, unsigned long len)
131{
132 return (crc32(~0L, buf, len) ^ ~0L);
133}
134
135/**
136 * last_lba(): return number of last logical block of device
137 * @bdev: block device
138 *
139 * Description: Returns last LBA value on success, 0 on error.
140 * This is stored (by sd and ide-geometry) in
141 * the part[0] entry for this disk, and is the number of
142 * physical sectors available on the disk.
143 */
144static u64 last_lba(struct block_device *bdev)
145{
146 if (!bdev || !bdev->bd_inode)
147 return 0;
148 return div_u64(bdev->bd_inode->i_size,
149 bdev_logical_block_size(bdev)) - 1ULL;
150}
151
152static inline int
153pmbr_part_valid(struct partition *part)
154{
155 if (part->sys_ind == EFI_PMBR_OSTYPE_EFI_GPT &&
156 le32_to_cpu(part->start_sect) == 1UL)
157 return 1;
158 return 0;
159}
160
161/**
162 * is_pmbr_valid(): test Protective MBR for validity
163 * @mbr: pointer to a legacy mbr structure
164 *
165 * Description: Returns 1 if PMBR is valid, 0 otherwise.
166 * Validity depends on two things:
167 * 1) MSDOS signature is in the last two bytes of the MBR
168 * 2) One partition of type 0xEE is found
169 */
170static int
171is_pmbr_valid(legacy_mbr *mbr)
172{
173 int i;
174 if (!mbr || le16_to_cpu(mbr->signature) != MSDOS_MBR_SIGNATURE)
175 return 0;
176 for (i = 0; i < 4; i++)
177 if (pmbr_part_valid(&mbr->partition_record[i]))
178 return 1;
179 return 0;
180}
181
182/**
183 * read_lba(): Read bytes from disk, starting at given LBA
184 * @state
185 * @lba
186 * @buffer
187 * @size_t
188 *
189 * Description: Reads @count bytes from @state->bdev into @buffer.
190 * Returns number of bytes read on success, 0 on error.
191 */
192static size_t read_lba(struct parsed_partitions *state,
193 u64 lba, u8 *buffer, size_t count)
194{
195 size_t totalreadcount = 0;
196 struct block_device *bdev = state->bdev;
197 sector_t n = lba * (bdev_logical_block_size(bdev) / 512);
198
199 if (!buffer || lba > last_lba(bdev))
200 return 0;
201
202 while (count) {
203 int copied = 512;
204 Sector sect;
205 unsigned char *data = read_part_sector(state, n++, &sect);
206 if (!data)
207 break;
208 if (copied > count)
209 copied = count;
210 memcpy(buffer, data, copied);
211 put_dev_sector(sect);
212 buffer += copied;
213 totalreadcount +=copied;
214 count -= copied;
215 }
216 return totalreadcount;
217}
218
219/**
220 * alloc_read_gpt_entries(): reads partition entries from disk
221 * @state
222 * @gpt - GPT header
223 *
224 * Description: Returns ptes on success, NULL on error.
225 * Allocates space for PTEs based on information found in @gpt.
226 * Notes: remember to free pte when you're done!
227 */
228static gpt_entry *alloc_read_gpt_entries(struct parsed_partitions *state,
229 gpt_header *gpt)
230{
231 size_t count;
232 gpt_entry *pte;
233
234 if (!gpt)
235 return NULL;
236
237 count = le32_to_cpu(gpt->num_partition_entries) *
238 le32_to_cpu(gpt->sizeof_partition_entry);
239 if (!count)
240 return NULL;
241 pte = kzalloc(count, GFP_KERNEL);
242 if (!pte)
243 return NULL;
244
245 if (read_lba(state, le64_to_cpu(gpt->partition_entry_lba),
246 (u8 *) pte,
247 count) < count) {
248 kfree(pte);
249 pte=NULL;
250 return NULL;
251 }
252 return pte;
253}
254
255/**
256 * alloc_read_gpt_header(): Allocates GPT header, reads into it from disk
257 * @state
258 * @lba is the Logical Block Address of the partition table
259 *
260 * Description: returns GPT header on success, NULL on error. Allocates
261 * and fills a GPT header starting at @ from @state->bdev.
262 * Note: remember to free gpt when finished with it.
263 */
264static gpt_header *alloc_read_gpt_header(struct parsed_partitions *state,
265 u64 lba)
266{
267 gpt_header *gpt;
268 unsigned ssz = bdev_logical_block_size(state->bdev);
269
270 gpt = kzalloc(ssz, GFP_KERNEL);
271 if (!gpt)
272 return NULL;
273
274 if (read_lba(state, lba, (u8 *) gpt, ssz) < ssz) {
275 kfree(gpt);
276 gpt=NULL;
277 return NULL;
278 }
279
280 return gpt;
281}
282
283/**
284 * is_gpt_valid() - tests one GPT header and PTEs for validity
285 * @state
286 * @lba is the logical block address of the GPT header to test
287 * @gpt is a GPT header ptr, filled on return.
288 * @ptes is a PTEs ptr, filled on return.
289 *
290 * Description: returns 1 if valid, 0 on error.
291 * If valid, returns pointers to newly allocated GPT header and PTEs.
292 */
293static int is_gpt_valid(struct parsed_partitions *state, u64 lba,
294 gpt_header **gpt, gpt_entry **ptes)
295{
296 u32 crc, origcrc;
297 u64 lastlba;
298
299 if (!ptes)
300 return 0;
301 if (!(*gpt = alloc_read_gpt_header(state, lba)))
302 return 0;
303
304 /* Check the GUID Partition Table signature */
305 if (le64_to_cpu((*gpt)->signature) != GPT_HEADER_SIGNATURE) {
306 pr_debug("GUID Partition Table Header signature is wrong:"
307 "%lld != %lld\n",
308 (unsigned long long)le64_to_cpu((*gpt)->signature),
309 (unsigned long long)GPT_HEADER_SIGNATURE);
310 goto fail;
311 }
312
313 /* Check the GUID Partition Table header size */
314 if (le32_to_cpu((*gpt)->header_size) >
315 bdev_logical_block_size(state->bdev)) {
316 pr_debug("GUID Partition Table Header size is wrong: %u > %u\n",
317 le32_to_cpu((*gpt)->header_size),
318 bdev_logical_block_size(state->bdev));
319 goto fail;
320 }
321
322 /* Check the GUID Partition Table CRC */
323 origcrc = le32_to_cpu((*gpt)->header_crc32);
324 (*gpt)->header_crc32 = 0;
325 crc = efi_crc32((const unsigned char *) (*gpt), le32_to_cpu((*gpt)->header_size));
326
327 if (crc != origcrc) {
328 pr_debug("GUID Partition Table Header CRC is wrong: %x != %x\n",
329 crc, origcrc);
330 goto fail;
331 }
332 (*gpt)->header_crc32 = cpu_to_le32(origcrc);
333
334 /* Check that the my_lba entry points to the LBA that contains
335 * the GUID Partition Table */
336 if (le64_to_cpu((*gpt)->my_lba) != lba) {
337 pr_debug("GPT my_lba incorrect: %lld != %lld\n",
338 (unsigned long long)le64_to_cpu((*gpt)->my_lba),
339 (unsigned long long)lba);
340 goto fail;
341 }
342
343 /* Check the first_usable_lba and last_usable_lba are
344 * within the disk.
345 */
346 lastlba = last_lba(state->bdev);
347 if (le64_to_cpu((*gpt)->first_usable_lba) > lastlba) {
348 pr_debug("GPT: first_usable_lba incorrect: %lld > %lld\n",
349 (unsigned long long)le64_to_cpu((*gpt)->first_usable_lba),
350 (unsigned long long)lastlba);
351 goto fail;
352 }
353 if (le64_to_cpu((*gpt)->last_usable_lba) > lastlba) {
354 pr_debug("GPT: last_usable_lba incorrect: %lld > %lld\n",
355 (unsigned long long)le64_to_cpu((*gpt)->last_usable_lba),
356 (unsigned long long)lastlba);
357 goto fail;
358 }
359
360 /* Check that sizeof_partition_entry has the correct value */
361 if (le32_to_cpu((*gpt)->sizeof_partition_entry) != sizeof(gpt_entry)) {
362 pr_debug("GUID Partitition Entry Size check failed.\n");
363 goto fail;
364 }
365
366 if (!(*ptes = alloc_read_gpt_entries(state, *gpt)))
367 goto fail;
368
369 /* Check the GUID Partition Entry Array CRC */
370 crc = efi_crc32((const unsigned char *) (*ptes),
371 le32_to_cpu((*gpt)->num_partition_entries) *
372 le32_to_cpu((*gpt)->sizeof_partition_entry));
373
374 if (crc != le32_to_cpu((*gpt)->partition_entry_array_crc32)) {
375 pr_debug("GUID Partitition Entry Array CRC check failed.\n");
376 goto fail_ptes;
377 }
378
379 /* We're done, all's well */
380 return 1;
381
382 fail_ptes:
383 kfree(*ptes);
384 *ptes = NULL;
385 fail:
386 kfree(*gpt);
387 *gpt = NULL;
388 return 0;
389}
390
391/**
392 * is_pte_valid() - tests one PTE for validity
393 * @pte is the pte to check
394 * @lastlba is last lba of the disk
395 *
396 * Description: returns 1 if valid, 0 on error.
397 */
398static inline int
399is_pte_valid(const gpt_entry *pte, const u64 lastlba)
400{
401 if ((!efi_guidcmp(pte->partition_type_guid, NULL_GUID)) ||
402 le64_to_cpu(pte->starting_lba) > lastlba ||
403 le64_to_cpu(pte->ending_lba) > lastlba)
404 return 0;
405 return 1;
406}
407
408/**
409 * compare_gpts() - Search disk for valid GPT headers and PTEs
410 * @pgpt is the primary GPT header
411 * @agpt is the alternate GPT header
412 * @lastlba is the last LBA number
413 * Description: Returns nothing. Sanity checks pgpt and agpt fields
414 * and prints warnings on discrepancies.
415 *
416 */
417static void
418compare_gpts(gpt_header *pgpt, gpt_header *agpt, u64 lastlba)
419{
420 int error_found = 0;
421 if (!pgpt || !agpt)
422 return;
423 if (le64_to_cpu(pgpt->my_lba) != le64_to_cpu(agpt->alternate_lba)) {
424 printk(KERN_WARNING
425 "GPT:Primary header LBA != Alt. header alternate_lba\n");
426 printk(KERN_WARNING "GPT:%lld != %lld\n",
427 (unsigned long long)le64_to_cpu(pgpt->my_lba),
428 (unsigned long long)le64_to_cpu(agpt->alternate_lba));
429 error_found++;
430 }
431 if (le64_to_cpu(pgpt->alternate_lba) != le64_to_cpu(agpt->my_lba)) {
432 printk(KERN_WARNING
433 "GPT:Primary header alternate_lba != Alt. header my_lba\n");
434 printk(KERN_WARNING "GPT:%lld != %lld\n",
435 (unsigned long long)le64_to_cpu(pgpt->alternate_lba),
436 (unsigned long long)le64_to_cpu(agpt->my_lba));
437 error_found++;
438 }
439 if (le64_to_cpu(pgpt->first_usable_lba) !=
440 le64_to_cpu(agpt->first_usable_lba)) {
441 printk(KERN_WARNING "GPT:first_usable_lbas don't match.\n");
442 printk(KERN_WARNING "GPT:%lld != %lld\n",
443 (unsigned long long)le64_to_cpu(pgpt->first_usable_lba),
444 (unsigned long long)le64_to_cpu(agpt->first_usable_lba));
445 error_found++;
446 }
447 if (le64_to_cpu(pgpt->last_usable_lba) !=
448 le64_to_cpu(agpt->last_usable_lba)) {
449 printk(KERN_WARNING "GPT:last_usable_lbas don't match.\n");
450 printk(KERN_WARNING "GPT:%lld != %lld\n",
451 (unsigned long long)le64_to_cpu(pgpt->last_usable_lba),
452 (unsigned long long)le64_to_cpu(agpt->last_usable_lba));
453 error_found++;
454 }
455 if (efi_guidcmp(pgpt->disk_guid, agpt->disk_guid)) {
456 printk(KERN_WARNING "GPT:disk_guids don't match.\n");
457 error_found++;
458 }
459 if (le32_to_cpu(pgpt->num_partition_entries) !=
460 le32_to_cpu(agpt->num_partition_entries)) {
461 printk(KERN_WARNING "GPT:num_partition_entries don't match: "
462 "0x%x != 0x%x\n",
463 le32_to_cpu(pgpt->num_partition_entries),
464 le32_to_cpu(agpt->num_partition_entries));
465 error_found++;
466 }
467 if (le32_to_cpu(pgpt->sizeof_partition_entry) !=
468 le32_to_cpu(agpt->sizeof_partition_entry)) {
469 printk(KERN_WARNING
470 "GPT:sizeof_partition_entry values don't match: "
471 "0x%x != 0x%x\n",
472 le32_to_cpu(pgpt->sizeof_partition_entry),
473 le32_to_cpu(agpt->sizeof_partition_entry));
474 error_found++;
475 }
476 if (le32_to_cpu(pgpt->partition_entry_array_crc32) !=
477 le32_to_cpu(agpt->partition_entry_array_crc32)) {
478 printk(KERN_WARNING
479 "GPT:partition_entry_array_crc32 values don't match: "
480 "0x%x != 0x%x\n",
481 le32_to_cpu(pgpt->partition_entry_array_crc32),
482 le32_to_cpu(agpt->partition_entry_array_crc32));
483 error_found++;
484 }
485 if (le64_to_cpu(pgpt->alternate_lba) != lastlba) {
486 printk(KERN_WARNING
487 "GPT:Primary header thinks Alt. header is not at the end of the disk.\n");
488 printk(KERN_WARNING "GPT:%lld != %lld\n",
489 (unsigned long long)le64_to_cpu(pgpt->alternate_lba),
490 (unsigned long long)lastlba);
491 error_found++;
492 }
493
494 if (le64_to_cpu(agpt->my_lba) != lastlba) {
495 printk(KERN_WARNING
496 "GPT:Alternate GPT header not at the end of the disk.\n");
497 printk(KERN_WARNING "GPT:%lld != %lld\n",
498 (unsigned long long)le64_to_cpu(agpt->my_lba),
499 (unsigned long long)lastlba);
500 error_found++;
501 }
502
503 if (error_found)
504 printk(KERN_WARNING
505 "GPT: Use GNU Parted to correct GPT errors.\n");
506 return;
507}
508
509/**
510 * find_valid_gpt() - Search disk for valid GPT headers and PTEs
511 * @state
512 * @gpt is a GPT header ptr, filled on return.
513 * @ptes is a PTEs ptr, filled on return.
514 * Description: Returns 1 if valid, 0 on error.
515 * If valid, returns pointers to newly allocated GPT header and PTEs.
516 * Validity depends on PMBR being valid (or being overridden by the
517 * 'gpt' kernel command line option) and finding either the Primary
518 * GPT header and PTEs valid, or the Alternate GPT header and PTEs
519 * valid. If the Primary GPT header is not valid, the Alternate GPT header
520 * is not checked unless the 'gpt' kernel command line option is passed.
521 * This protects against devices which misreport their size, and forces
522 * the user to decide to use the Alternate GPT.
523 */
524static int find_valid_gpt(struct parsed_partitions *state, gpt_header **gpt,
525 gpt_entry **ptes)
526{
527 int good_pgpt = 0, good_agpt = 0, good_pmbr = 0;
528 gpt_header *pgpt = NULL, *agpt = NULL;
529 gpt_entry *pptes = NULL, *aptes = NULL;
530 legacy_mbr *legacymbr;
531 u64 lastlba;
532
533 if (!ptes)
534 return 0;
535
536 lastlba = last_lba(state->bdev);
537 if (!force_gpt) {
538 /* This will be added to the EFI Spec. per Intel after v1.02. */
539 legacymbr = kzalloc(sizeof (*legacymbr), GFP_KERNEL);
540 if (legacymbr) {
541 read_lba(state, 0, (u8 *) legacymbr,
542 sizeof (*legacymbr));
543 good_pmbr = is_pmbr_valid(legacymbr);
544 kfree(legacymbr);
545 }
546 if (!good_pmbr)
547 goto fail;
548 }
549
550 good_pgpt = is_gpt_valid(state, GPT_PRIMARY_PARTITION_TABLE_LBA,
551 &pgpt, &pptes);
552 if (good_pgpt)
553 good_agpt = is_gpt_valid(state,
554 le64_to_cpu(pgpt->alternate_lba),
555 &agpt, &aptes);
556 if (!good_agpt && force_gpt)
557 good_agpt = is_gpt_valid(state, lastlba, &agpt, &aptes);
558
559 /* The obviously unsuccessful case */
560 if (!good_pgpt && !good_agpt)
561 goto fail;
562
563 compare_gpts(pgpt, agpt, lastlba);
564
565 /* The good cases */
566 if (good_pgpt) {
567 *gpt = pgpt;
568 *ptes = pptes;
569 kfree(agpt);
570 kfree(aptes);
571 if (!good_agpt) {
572 printk(KERN_WARNING
573 "Alternate GPT is invalid, "
574 "using primary GPT.\n");
575 }
576 return 1;
577 }
578 else if (good_agpt) {
579 *gpt = agpt;
580 *ptes = aptes;
581 kfree(pgpt);
582 kfree(pptes);
583 printk(KERN_WARNING
584 "Primary GPT is invalid, using alternate GPT.\n");
585 return 1;
586 }
587
588 fail:
589 kfree(pgpt);
590 kfree(agpt);
591 kfree(pptes);
592 kfree(aptes);
593 *gpt = NULL;
594 *ptes = NULL;
595 return 0;
596}
597
598/**
599 * efi_partition(struct parsed_partitions *state)
600 * @state
601 *
602 * Description: called from check.c, if the disk contains GPT
603 * partitions, sets up partition entries in the kernel.
604 *
605 * If the first block on the disk is a legacy MBR,
606 * it will get handled by msdos_partition().
607 * If it's a Protective MBR, we'll handle it here.
608 *
609 * We do not create a Linux partition for GPT, but
610 * only for the actual data partitions.
611 * Returns:
612 * -1 if unable to read the partition table
613 * 0 if this isn't our partition table
614 * 1 if successful
615 *
616 */
617int efi_partition(struct parsed_partitions *state)
618{
619 gpt_header *gpt = NULL;
620 gpt_entry *ptes = NULL;
621 u32 i;
622 unsigned ssz = bdev_logical_block_size(state->bdev) / 512;
623 u8 unparsed_guid[37];
624
625 if (!find_valid_gpt(state, &gpt, &ptes) || !gpt || !ptes) {
626 kfree(gpt);
627 kfree(ptes);
628 return 0;
629 }
630
631 pr_debug("GUID Partition Table is valid! Yea!\n");
632
633 for (i = 0; i < le32_to_cpu(gpt->num_partition_entries) && i < state->limit-1; i++) {
634 struct partition_meta_info *info;
635 unsigned label_count = 0;
636 unsigned label_max;
637 u64 start = le64_to_cpu(ptes[i].starting_lba);
638 u64 size = le64_to_cpu(ptes[i].ending_lba) -
639 le64_to_cpu(ptes[i].starting_lba) + 1ULL;
640
641 if (!is_pte_valid(&ptes[i], last_lba(state->bdev)))
642 continue;
643
644 put_partition(state, i+1, start * ssz, size * ssz);
645
646 /* If this is a RAID volume, tell md */
647 if (!efi_guidcmp(ptes[i].partition_type_guid,
648 PARTITION_LINUX_RAID_GUID))
649 state->parts[i + 1].flags = ADDPART_FLAG_RAID;
650
651 info = &state->parts[i + 1].info;
652 /* Instead of doing a manual swap to big endian, reuse the
653 * common ASCII hex format as the interim.
654 */
655 efi_guid_unparse(&ptes[i].unique_partition_guid, unparsed_guid);
656 part_pack_uuid(unparsed_guid, info->uuid);
657
658 /* Naively convert UTF16-LE to 7 bits. */
659 label_max = min(sizeof(info->volname) - 1,
660 sizeof(ptes[i].partition_name));
661 info->volname[label_max] = 0;
662 while (label_count < label_max) {
663 u8 c = ptes[i].partition_name[label_count] & 0xff;
664 if (c && !isprint(c))
665 c = '!';
666 info->volname[label_count] = c;
667 label_count++;
668 }
669 state->parts[i + 1].has_info = true;
670 }
671 kfree(ptes);
672 kfree(gpt);
673 strlcat(state->pp_buf, "\n", PAGE_SIZE);
674 return 1;
675}
diff --git a/block/partitions/efi.h b/block/partitions/efi.h
new file mode 100644
index 000000000000..b69ab729558f
--- /dev/null
+++ b/block/partitions/efi.h
@@ -0,0 +1,134 @@
1/************************************************************
2 * EFI GUID Partition Table
3 * Per Intel EFI Specification v1.02
4 * http://developer.intel.com/technology/efi/efi.htm
5 *
6 * By Matt Domsch <Matt_Domsch@dell.com> Fri Sep 22 22:15:56 CDT 2000
7 * Copyright 2000,2001 Dell Inc.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 *
23 ************************************************************/
24
25#ifndef FS_PART_EFI_H_INCLUDED
26#define FS_PART_EFI_H_INCLUDED
27
28#include <linux/types.h>
29#include <linux/fs.h>
30#include <linux/genhd.h>
31#include <linux/kernel.h>
32#include <linux/major.h>
33#include <linux/string.h>
34#include <linux/efi.h>
35
36#define MSDOS_MBR_SIGNATURE 0xaa55
37#define EFI_PMBR_OSTYPE_EFI 0xEF
38#define EFI_PMBR_OSTYPE_EFI_GPT 0xEE
39
40#define GPT_HEADER_SIGNATURE 0x5452415020494645ULL
41#define GPT_HEADER_REVISION_V1 0x00010000
42#define GPT_PRIMARY_PARTITION_TABLE_LBA 1
43
44#define PARTITION_SYSTEM_GUID \
45 EFI_GUID( 0xC12A7328, 0xF81F, 0x11d2, \
46 0xBA, 0x4B, 0x00, 0xA0, 0xC9, 0x3E, 0xC9, 0x3B)
47#define LEGACY_MBR_PARTITION_GUID \
48 EFI_GUID( 0x024DEE41, 0x33E7, 0x11d3, \
49 0x9D, 0x69, 0x00, 0x08, 0xC7, 0x81, 0xF3, 0x9F)
50#define PARTITION_MSFT_RESERVED_GUID \
51 EFI_GUID( 0xE3C9E316, 0x0B5C, 0x4DB8, \
52 0x81, 0x7D, 0xF9, 0x2D, 0xF0, 0x02, 0x15, 0xAE)
53#define PARTITION_BASIC_DATA_GUID \
54 EFI_GUID( 0xEBD0A0A2, 0xB9E5, 0x4433, \
55 0x87, 0xC0, 0x68, 0xB6, 0xB7, 0x26, 0x99, 0xC7)
56#define PARTITION_LINUX_RAID_GUID \
57 EFI_GUID( 0xa19d880f, 0x05fc, 0x4d3b, \
58 0xa0, 0x06, 0x74, 0x3f, 0x0f, 0x84, 0x91, 0x1e)
59#define PARTITION_LINUX_SWAP_GUID \
60 EFI_GUID( 0x0657fd6d, 0xa4ab, 0x43c4, \
61 0x84, 0xe5, 0x09, 0x33, 0xc8, 0x4b, 0x4f, 0x4f)
62#define PARTITION_LINUX_LVM_GUID \
63 EFI_GUID( 0xe6d6d379, 0xf507, 0x44c2, \
64 0xa2, 0x3c, 0x23, 0x8f, 0x2a, 0x3d, 0xf9, 0x28)
65
66typedef struct _gpt_header {
67 __le64 signature;
68 __le32 revision;
69 __le32 header_size;
70 __le32 header_crc32;
71 __le32 reserved1;
72 __le64 my_lba;
73 __le64 alternate_lba;
74 __le64 first_usable_lba;
75 __le64 last_usable_lba;
76 efi_guid_t disk_guid;
77 __le64 partition_entry_lba;
78 __le32 num_partition_entries;
79 __le32 sizeof_partition_entry;
80 __le32 partition_entry_array_crc32;
81
82 /* The rest of the logical block is reserved by UEFI and must be zero.
83 * EFI standard handles this by:
84 *
85 * uint8_t reserved2[ BlockSize - 92 ];
86 */
87} __attribute__ ((packed)) gpt_header;
88
89typedef struct _gpt_entry_attributes {
90 u64 required_to_function:1;
91 u64 reserved:47;
92 u64 type_guid_specific:16;
93} __attribute__ ((packed)) gpt_entry_attributes;
94
95typedef struct _gpt_entry {
96 efi_guid_t partition_type_guid;
97 efi_guid_t unique_partition_guid;
98 __le64 starting_lba;
99 __le64 ending_lba;
100 gpt_entry_attributes attributes;
101 efi_char16_t partition_name[72 / sizeof (efi_char16_t)];
102} __attribute__ ((packed)) gpt_entry;
103
104typedef struct _legacy_mbr {
105 u8 boot_code[440];
106 __le32 unique_mbr_signature;
107 __le16 unknown;
108 struct partition partition_record[4];
109 __le16 signature;
110} __attribute__ ((packed)) legacy_mbr;
111
112/* Functions */
113extern int efi_partition(struct parsed_partitions *state);
114
115#endif
116
117/*
118 * Overrides for Emacs so that we follow Linus's tabbing style.
119 * Emacs will notice this stuff at the end of the file and automatically
120 * adjust the settings for this buffer only. This must remain at the end
121 * of the file.
122 * --------------------------------------------------------------------------
123 * Local variables:
124 * c-indent-level: 4
125 * c-brace-imaginary-offset: 0
126 * c-brace-offset: -4
127 * c-argdecl-indent: 4
128 * c-label-offset: -4
129 * c-continued-statement-offset: 4
130 * c-continued-brace-offset: 0
131 * indent-tabs-mode: nil
132 * tab-width: 8
133 * End:
134 */
diff --git a/block/partitions/ibm.c b/block/partitions/ibm.c
new file mode 100644
index 000000000000..d513a07f44bb
--- /dev/null
+++ b/block/partitions/ibm.c
@@ -0,0 +1,275 @@
1/*
2 * File...........: linux/fs/partitions/ibm.c
3 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
4 * Volker Sameske <sameske@de.ibm.com>
5 * Bugreports.to..: <Linux390@de.ibm.com>
6 * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000
7 */
8
9#include <linux/buffer_head.h>
10#include <linux/hdreg.h>
11#include <linux/slab.h>
12#include <asm/dasd.h>
13#include <asm/ebcdic.h>
14#include <asm/uaccess.h>
15#include <asm/vtoc.h>
16
17#include "check.h"
18#include "ibm.h"
19
20/*
21 * compute the block number from a
22 * cyl-cyl-head-head structure
23 */
24static sector_t
25cchh2blk (struct vtoc_cchh *ptr, struct hd_geometry *geo) {
26
27 sector_t cyl;
28 __u16 head;
29
30 /*decode cylinder and heads for large volumes */
31 cyl = ptr->hh & 0xFFF0;
32 cyl <<= 12;
33 cyl |= ptr->cc;
34 head = ptr->hh & 0x000F;
35 return cyl * geo->heads * geo->sectors +
36 head * geo->sectors;
37}
38
39/*
40 * compute the block number from a
41 * cyl-cyl-head-head-block structure
42 */
43static sector_t
44cchhb2blk (struct vtoc_cchhb *ptr, struct hd_geometry *geo) {
45
46 sector_t cyl;
47 __u16 head;
48
49 /*decode cylinder and heads for large volumes */
50 cyl = ptr->hh & 0xFFF0;
51 cyl <<= 12;
52 cyl |= ptr->cc;
53 head = ptr->hh & 0x000F;
54 return cyl * geo->heads * geo->sectors +
55 head * geo->sectors +
56 ptr->b;
57}
58
59/*
60 */
61int ibm_partition(struct parsed_partitions *state)
62{
63 struct block_device *bdev = state->bdev;
64 int blocksize, res;
65 loff_t i_size, offset, size, fmt_size;
66 dasd_information2_t *info;
67 struct hd_geometry *geo;
68 char type[5] = {0,};
69 char name[7] = {0,};
70 union label_t {
71 struct vtoc_volume_label_cdl vol;
72 struct vtoc_volume_label_ldl lnx;
73 struct vtoc_cms_label cms;
74 } *label;
75 unsigned char *data;
76 Sector sect;
77 sector_t labelsect;
78 char tmp[64];
79
80 res = 0;
81 blocksize = bdev_logical_block_size(bdev);
82 if (blocksize <= 0)
83 goto out_exit;
84 i_size = i_size_read(bdev->bd_inode);
85 if (i_size == 0)
86 goto out_exit;
87
88 info = kmalloc(sizeof(dasd_information2_t), GFP_KERNEL);
89 if (info == NULL)
90 goto out_exit;
91 geo = kmalloc(sizeof(struct hd_geometry), GFP_KERNEL);
92 if (geo == NULL)
93 goto out_nogeo;
94 label = kmalloc(sizeof(union label_t), GFP_KERNEL);
95 if (label == NULL)
96 goto out_nolab;
97
98 if (ioctl_by_bdev(bdev, BIODASDINFO2, (unsigned long)info) != 0 ||
99 ioctl_by_bdev(bdev, HDIO_GETGEO, (unsigned long)geo) != 0)
100 goto out_freeall;
101
102 /*
103 * Special case for FBA disks: label sector does not depend on
104 * blocksize.
105 */
106 if ((info->cu_type == 0x6310 && info->dev_type == 0x9336) ||
107 (info->cu_type == 0x3880 && info->dev_type == 0x3370))
108 labelsect = info->label_block;
109 else
110 labelsect = info->label_block * (blocksize >> 9);
111
112 /*
113 * Get volume label, extract name and type.
114 */
115 data = read_part_sector(state, labelsect, &sect);
116 if (data == NULL)
117 goto out_readerr;
118
119 memcpy(label, data, sizeof(union label_t));
120 put_dev_sector(sect);
121
122 if ((!info->FBA_layout) && (!strcmp(info->type, "ECKD"))) {
123 strncpy(type, label->vol.vollbl, 4);
124 strncpy(name, label->vol.volid, 6);
125 } else {
126 strncpy(type, label->lnx.vollbl, 4);
127 strncpy(name, label->lnx.volid, 6);
128 }
129 EBCASC(type, 4);
130 EBCASC(name, 6);
131
132 res = 1;
133
134 /*
135 * Three different formats: LDL, CDL and unformated disk
136 *
137 * identified by info->format
138 *
139 * unformated disks we do not have to care about
140 */
141 if (info->format == DASD_FORMAT_LDL) {
142 if (strncmp(type, "CMS1", 4) == 0) {
143 /*
144 * VM style CMS1 labeled disk
145 */
146 blocksize = label->cms.block_size;
147 if (label->cms.disk_offset != 0) {
148 snprintf(tmp, sizeof(tmp), "CMS1/%8s(MDSK):", name);
149 strlcat(state->pp_buf, tmp, PAGE_SIZE);
150 /* disk is reserved minidisk */
151 offset = label->cms.disk_offset;
152 size = (label->cms.block_count - 1)
153 * (blocksize >> 9);
154 } else {
155 snprintf(tmp, sizeof(tmp), "CMS1/%8s:", name);
156 strlcat(state->pp_buf, tmp, PAGE_SIZE);
157 offset = (info->label_block + 1);
158 size = label->cms.block_count
159 * (blocksize >> 9);
160 }
161 put_partition(state, 1, offset*(blocksize >> 9),
162 size-offset*(blocksize >> 9));
163 } else {
164 if (strncmp(type, "LNX1", 4) == 0) {
165 snprintf(tmp, sizeof(tmp), "LNX1/%8s:", name);
166 strlcat(state->pp_buf, tmp, PAGE_SIZE);
167 if (label->lnx.ldl_version == 0xf2) {
168 fmt_size = label->lnx.formatted_blocks
169 * (blocksize >> 9);
170 } else if (!strcmp(info->type, "ECKD")) {
171 /* formated w/o large volume support */
172 fmt_size = geo->cylinders * geo->heads
173 * geo->sectors * (blocksize >> 9);
174 } else {
175 /* old label and no usable disk geometry
176 * (e.g. DIAG) */
177 fmt_size = i_size >> 9;
178 }
179 size = i_size >> 9;
180 if (fmt_size < size)
181 size = fmt_size;
182 offset = (info->label_block + 1);
183 } else {
184 /* unlabeled disk */
185 strlcat(state->pp_buf, "(nonl)", PAGE_SIZE);
186 size = i_size >> 9;
187 offset = (info->label_block + 1);
188 }
189 put_partition(state, 1, offset*(blocksize >> 9),
190 size-offset*(blocksize >> 9));
191 }
192 } else if (info->format == DASD_FORMAT_CDL) {
193 /*
194 * New style CDL formatted disk
195 */
196 sector_t blk;
197 int counter;
198
199 /*
200 * check if VOL1 label is available
201 * if not, something is wrong, skipping partition detection
202 */
203 if (strncmp(type, "VOL1", 4) == 0) {
204 snprintf(tmp, sizeof(tmp), "VOL1/%8s:", name);
205 strlcat(state->pp_buf, tmp, PAGE_SIZE);
206 /*
207 * get block number and read then go through format1
208 * labels
209 */
210 blk = cchhb2blk(&label->vol.vtoc, geo) + 1;
211 counter = 0;
212 data = read_part_sector(state, blk * (blocksize/512),
213 &sect);
214 while (data != NULL) {
215 struct vtoc_format1_label f1;
216
217 memcpy(&f1, data,
218 sizeof(struct vtoc_format1_label));
219 put_dev_sector(sect);
220
221 /* skip FMT4 / FMT5 / FMT7 labels */
222 if (f1.DS1FMTID == _ascebc['4']
223 || f1.DS1FMTID == _ascebc['5']
224 || f1.DS1FMTID == _ascebc['7']
225 || f1.DS1FMTID == _ascebc['9']) {
226 blk++;
227 data = read_part_sector(state,
228 blk * (blocksize/512), &sect);
229 continue;
230 }
231
232 /* only FMT1 and 8 labels valid at this point */
233 if (f1.DS1FMTID != _ascebc['1'] &&
234 f1.DS1FMTID != _ascebc['8'])
235 break;
236
237 /* OK, we got valid partition data */
238 offset = cchh2blk(&f1.DS1EXT1.llimit, geo);
239 size = cchh2blk(&f1.DS1EXT1.ulimit, geo) -
240 offset + geo->sectors;
241 if (counter >= state->limit)
242 break;
243 put_partition(state, counter + 1,
244 offset * (blocksize >> 9),
245 size * (blocksize >> 9));
246 counter++;
247 blk++;
248 data = read_part_sector(state,
249 blk * (blocksize/512), &sect);
250 }
251
252 if (!data)
253 /* Are we not supposed to report this ? */
254 goto out_readerr;
255 } else
256 printk(KERN_WARNING "Warning, expected Label VOL1 not "
257 "found, treating as CDL formated Disk");
258
259 }
260
261 strlcat(state->pp_buf, "\n", PAGE_SIZE);
262 goto out_freeall;
263
264
265out_readerr:
266 res = -1;
267out_freeall:
268 kfree(label);
269out_nolab:
270 kfree(geo);
271out_nogeo:
272 kfree(info);
273out_exit:
274 return res;
275}
diff --git a/block/partitions/ibm.h b/block/partitions/ibm.h
new file mode 100644
index 000000000000..08fb0804a812
--- /dev/null
+++ b/block/partitions/ibm.h
@@ -0,0 +1 @@
int ibm_partition(struct parsed_partitions *);
diff --git a/block/partitions/karma.c b/block/partitions/karma.c
new file mode 100644
index 000000000000..0ea19312706b
--- /dev/null
+++ b/block/partitions/karma.c
@@ -0,0 +1,57 @@
1/*
2 * fs/partitions/karma.c
3 * Rio Karma partition info.
4 *
5 * Copyright (C) 2006 Bob Copeland (me@bobcopeland.com)
6 * based on osf.c
7 */
8
9#include "check.h"
10#include "karma.h"
11
12int karma_partition(struct parsed_partitions *state)
13{
14 int i;
15 int slot = 1;
16 Sector sect;
17 unsigned char *data;
18 struct disklabel {
19 u8 d_reserved[270];
20 struct d_partition {
21 __le32 p_res;
22 u8 p_fstype;
23 u8 p_res2[3];
24 __le32 p_offset;
25 __le32 p_size;
26 } d_partitions[2];
27 u8 d_blank[208];
28 __le16 d_magic;
29 } __attribute__((packed)) *label;
30 struct d_partition *p;
31
32 data = read_part_sector(state, 0, &sect);
33 if (!data)
34 return -1;
35
36 label = (struct disklabel *)data;
37 if (le16_to_cpu(label->d_magic) != KARMA_LABEL_MAGIC) {
38 put_dev_sector(sect);
39 return 0;
40 }
41
42 p = label->d_partitions;
43 for (i = 0 ; i < 2; i++, p++) {
44 if (slot == state->limit)
45 break;
46
47 if (p->p_fstype == 0x4d && le32_to_cpu(p->p_size)) {
48 put_partition(state, slot, le32_to_cpu(p->p_offset),
49 le32_to_cpu(p->p_size));
50 }
51 slot++;
52 }
53 strlcat(state->pp_buf, "\n", PAGE_SIZE);
54 put_dev_sector(sect);
55 return 1;
56}
57
diff --git a/block/partitions/karma.h b/block/partitions/karma.h
new file mode 100644
index 000000000000..c764b2e9df21
--- /dev/null
+++ b/block/partitions/karma.h
@@ -0,0 +1,8 @@
1/*
2 * fs/partitions/karma.h
3 */
4
5#define KARMA_LABEL_MAGIC 0xAB56
6
7int karma_partition(struct parsed_partitions *state);
8
diff --git a/block/partitions/ldm.c b/block/partitions/ldm.c
new file mode 100644
index 000000000000..bd8ae788f689
--- /dev/null
+++ b/block/partitions/ldm.c
@@ -0,0 +1,1570 @@
1/**
2 * ldm - Support for Windows Logical Disk Manager (Dynamic Disks)
3 *
4 * Copyright (C) 2001,2002 Richard Russon <ldm@flatcap.org>
5 * Copyright (c) 2001-2007 Anton Altaparmakov
6 * Copyright (C) 2001,2002 Jakob Kemi <jakob.kemi@telia.com>
7 *
8 * Documentation is available at http://www.linux-ntfs.org/doku.php?id=downloads
9 *
10 * This program is free software; you can redistribute it and/or modify it under
11 * the terms of the GNU General Public License as published by the Free Software
12 * Foundation; either version 2 of the License, or (at your option) any later
13 * version.
14 *
15 * This program is distributed in the hope that it will be useful, but WITHOUT
16 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
17 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
18 * details.
19 *
20 * You should have received a copy of the GNU General Public License along with
21 * this program (in the main directory of the source in the file COPYING); if
22 * not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
23 * Boston, MA 02111-1307 USA
24 */
25
26#include <linux/slab.h>
27#include <linux/pagemap.h>
28#include <linux/stringify.h>
29#include <linux/kernel.h>
30#include "ldm.h"
31#include "check.h"
32#include "msdos.h"
33
34/**
35 * ldm_debug/info/error/crit - Output an error message
36 * @f: A printf format string containing the message
37 * @...: Variables to substitute into @f
38 *
39 * ldm_debug() writes a DEBUG level message to the syslog but only if the
40 * driver was compiled with debug enabled. Otherwise, the call turns into a NOP.
41 */
42#ifndef CONFIG_LDM_DEBUG
43#define ldm_debug(...) do {} while (0)
44#else
45#define ldm_debug(f, a...) _ldm_printk (KERN_DEBUG, __func__, f, ##a)
46#endif
47
48#define ldm_crit(f, a...) _ldm_printk (KERN_CRIT, __func__, f, ##a)
49#define ldm_error(f, a...) _ldm_printk (KERN_ERR, __func__, f, ##a)
50#define ldm_info(f, a...) _ldm_printk (KERN_INFO, __func__, f, ##a)
51
52static __printf(3, 4)
53void _ldm_printk(const char *level, const char *function, const char *fmt, ...)
54{
55 struct va_format vaf;
56 va_list args;
57
58 va_start (args, fmt);
59
60 vaf.fmt = fmt;
61 vaf.va = &args;
62
63 printk("%s%s(): %pV\n", level, function, &vaf);
64
65 va_end(args);
66}
67
68/**
69 * ldm_parse_hexbyte - Convert a ASCII hex number to a byte
70 * @src: Pointer to at least 2 characters to convert.
71 *
72 * Convert a two character ASCII hex string to a number.
73 *
74 * Return: 0-255 Success, the byte was parsed correctly
75 * -1 Error, an invalid character was supplied
76 */
77static int ldm_parse_hexbyte (const u8 *src)
78{
79 unsigned int x; /* For correct wrapping */
80 int h;
81
82 /* high part */
83 x = h = hex_to_bin(src[0]);
84 if (h < 0)
85 return -1;
86
87 /* low part */
88 h = hex_to_bin(src[1]);
89 if (h < 0)
90 return -1;
91
92 return (x << 4) + h;
93}
94
95/**
96 * ldm_parse_guid - Convert GUID from ASCII to binary
97 * @src: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba
98 * @dest: Memory block to hold binary GUID (16 bytes)
99 *
100 * N.B. The GUID need not be NULL terminated.
101 *
102 * Return: 'true' @dest contains binary GUID
103 * 'false' @dest contents are undefined
104 */
105static bool ldm_parse_guid (const u8 *src, u8 *dest)
106{
107 static const int size[] = { 4, 2, 2, 2, 6 };
108 int i, j, v;
109
110 if (src[8] != '-' || src[13] != '-' ||
111 src[18] != '-' || src[23] != '-')
112 return false;
113
114 for (j = 0; j < 5; j++, src++)
115 for (i = 0; i < size[j]; i++, src+=2, *dest++ = v)
116 if ((v = ldm_parse_hexbyte (src)) < 0)
117 return false;
118
119 return true;
120}
121
122/**
123 * ldm_parse_privhead - Read the LDM Database PRIVHEAD structure
124 * @data: Raw database PRIVHEAD structure loaded from the device
125 * @ph: In-memory privhead structure in which to return parsed information
126 *
127 * This parses the LDM database PRIVHEAD structure supplied in @data and
128 * sets up the in-memory privhead structure @ph with the obtained information.
129 *
130 * Return: 'true' @ph contains the PRIVHEAD data
131 * 'false' @ph contents are undefined
132 */
133static bool ldm_parse_privhead(const u8 *data, struct privhead *ph)
134{
135 bool is_vista = false;
136
137 BUG_ON(!data || !ph);
138 if (MAGIC_PRIVHEAD != get_unaligned_be64(data)) {
139 ldm_error("Cannot find PRIVHEAD structure. LDM database is"
140 " corrupt. Aborting.");
141 return false;
142 }
143 ph->ver_major = get_unaligned_be16(data + 0x000C);
144 ph->ver_minor = get_unaligned_be16(data + 0x000E);
145 ph->logical_disk_start = get_unaligned_be64(data + 0x011B);
146 ph->logical_disk_size = get_unaligned_be64(data + 0x0123);
147 ph->config_start = get_unaligned_be64(data + 0x012B);
148 ph->config_size = get_unaligned_be64(data + 0x0133);
149 /* Version 2.11 is Win2k/XP and version 2.12 is Vista. */
150 if (ph->ver_major == 2 && ph->ver_minor == 12)
151 is_vista = true;
152 if (!is_vista && (ph->ver_major != 2 || ph->ver_minor != 11)) {
153 ldm_error("Expected PRIVHEAD version 2.11 or 2.12, got %d.%d."
154 " Aborting.", ph->ver_major, ph->ver_minor);
155 return false;
156 }
157 ldm_debug("PRIVHEAD version %d.%d (Windows %s).", ph->ver_major,
158 ph->ver_minor, is_vista ? "Vista" : "2000/XP");
159 if (ph->config_size != LDM_DB_SIZE) { /* 1 MiB in sectors. */
160 /* Warn the user and continue, carefully. */
161 ldm_info("Database is normally %u bytes, it claims to "
162 "be %llu bytes.", LDM_DB_SIZE,
163 (unsigned long long)ph->config_size);
164 }
165 if ((ph->logical_disk_size == 0) || (ph->logical_disk_start +
166 ph->logical_disk_size > ph->config_start)) {
167 ldm_error("PRIVHEAD disk size doesn't match real disk size");
168 return false;
169 }
170 if (!ldm_parse_guid(data + 0x0030, ph->disk_id)) {
171 ldm_error("PRIVHEAD contains an invalid GUID.");
172 return false;
173 }
174 ldm_debug("Parsed PRIVHEAD successfully.");
175 return true;
176}
177
178/**
179 * ldm_parse_tocblock - Read the LDM Database TOCBLOCK structure
180 * @data: Raw database TOCBLOCK structure loaded from the device
181 * @toc: In-memory toc structure in which to return parsed information
182 *
183 * This parses the LDM Database TOCBLOCK (table of contents) structure supplied
184 * in @data and sets up the in-memory tocblock structure @toc with the obtained
185 * information.
186 *
187 * N.B. The *_start and *_size values returned in @toc are not range-checked.
188 *
189 * Return: 'true' @toc contains the TOCBLOCK data
190 * 'false' @toc contents are undefined
191 */
192static bool ldm_parse_tocblock (const u8 *data, struct tocblock *toc)
193{
194 BUG_ON (!data || !toc);
195
196 if (MAGIC_TOCBLOCK != get_unaligned_be64(data)) {
197 ldm_crit ("Cannot find TOCBLOCK, database may be corrupt.");
198 return false;
199 }
200 strncpy (toc->bitmap1_name, data + 0x24, sizeof (toc->bitmap1_name));
201 toc->bitmap1_name[sizeof (toc->bitmap1_name) - 1] = 0;
202 toc->bitmap1_start = get_unaligned_be64(data + 0x2E);
203 toc->bitmap1_size = get_unaligned_be64(data + 0x36);
204
205 if (strncmp (toc->bitmap1_name, TOC_BITMAP1,
206 sizeof (toc->bitmap1_name)) != 0) {
207 ldm_crit ("TOCBLOCK's first bitmap is '%s', should be '%s'.",
208 TOC_BITMAP1, toc->bitmap1_name);
209 return false;
210 }
211 strncpy (toc->bitmap2_name, data + 0x46, sizeof (toc->bitmap2_name));
212 toc->bitmap2_name[sizeof (toc->bitmap2_name) - 1] = 0;
213 toc->bitmap2_start = get_unaligned_be64(data + 0x50);
214 toc->bitmap2_size = get_unaligned_be64(data + 0x58);
215 if (strncmp (toc->bitmap2_name, TOC_BITMAP2,
216 sizeof (toc->bitmap2_name)) != 0) {
217 ldm_crit ("TOCBLOCK's second bitmap is '%s', should be '%s'.",
218 TOC_BITMAP2, toc->bitmap2_name);
219 return false;
220 }
221 ldm_debug ("Parsed TOCBLOCK successfully.");
222 return true;
223}
224
225/**
226 * ldm_parse_vmdb - Read the LDM Database VMDB structure
227 * @data: Raw database VMDB structure loaded from the device
228 * @vm: In-memory vmdb structure in which to return parsed information
229 *
230 * This parses the LDM Database VMDB structure supplied in @data and sets up
231 * the in-memory vmdb structure @vm with the obtained information.
232 *
233 * N.B. The *_start, *_size and *_seq values will be range-checked later.
234 *
235 * Return: 'true' @vm contains VMDB info
236 * 'false' @vm contents are undefined
237 */
238static bool ldm_parse_vmdb (const u8 *data, struct vmdb *vm)
239{
240 BUG_ON (!data || !vm);
241
242 if (MAGIC_VMDB != get_unaligned_be32(data)) {
243 ldm_crit ("Cannot find the VMDB, database may be corrupt.");
244 return false;
245 }
246
247 vm->ver_major = get_unaligned_be16(data + 0x12);
248 vm->ver_minor = get_unaligned_be16(data + 0x14);
249 if ((vm->ver_major != 4) || (vm->ver_minor != 10)) {
250 ldm_error ("Expected VMDB version %d.%d, got %d.%d. "
251 "Aborting.", 4, 10, vm->ver_major, vm->ver_minor);
252 return false;
253 }
254
255 vm->vblk_size = get_unaligned_be32(data + 0x08);
256 if (vm->vblk_size == 0) {
257 ldm_error ("Illegal VBLK size");
258 return false;
259 }
260
261 vm->vblk_offset = get_unaligned_be32(data + 0x0C);
262 vm->last_vblk_seq = get_unaligned_be32(data + 0x04);
263
264 ldm_debug ("Parsed VMDB successfully.");
265 return true;
266}
267
268/**
269 * ldm_compare_privheads - Compare two privhead objects
270 * @ph1: First privhead
271 * @ph2: Second privhead
272 *
273 * This compares the two privhead structures @ph1 and @ph2.
274 *
275 * Return: 'true' Identical
276 * 'false' Different
277 */
278static bool ldm_compare_privheads (const struct privhead *ph1,
279 const struct privhead *ph2)
280{
281 BUG_ON (!ph1 || !ph2);
282
283 return ((ph1->ver_major == ph2->ver_major) &&
284 (ph1->ver_minor == ph2->ver_minor) &&
285 (ph1->logical_disk_start == ph2->logical_disk_start) &&
286 (ph1->logical_disk_size == ph2->logical_disk_size) &&
287 (ph1->config_start == ph2->config_start) &&
288 (ph1->config_size == ph2->config_size) &&
289 !memcmp (ph1->disk_id, ph2->disk_id, GUID_SIZE));
290}
291
292/**
293 * ldm_compare_tocblocks - Compare two tocblock objects
294 * @toc1: First toc
295 * @toc2: Second toc
296 *
297 * This compares the two tocblock structures @toc1 and @toc2.
298 *
299 * Return: 'true' Identical
300 * 'false' Different
301 */
302static bool ldm_compare_tocblocks (const struct tocblock *toc1,
303 const struct tocblock *toc2)
304{
305 BUG_ON (!toc1 || !toc2);
306
307 return ((toc1->bitmap1_start == toc2->bitmap1_start) &&
308 (toc1->bitmap1_size == toc2->bitmap1_size) &&
309 (toc1->bitmap2_start == toc2->bitmap2_start) &&
310 (toc1->bitmap2_size == toc2->bitmap2_size) &&
311 !strncmp (toc1->bitmap1_name, toc2->bitmap1_name,
312 sizeof (toc1->bitmap1_name)) &&
313 !strncmp (toc1->bitmap2_name, toc2->bitmap2_name,
314 sizeof (toc1->bitmap2_name)));
315}
316
317/**
318 * ldm_validate_privheads - Compare the primary privhead with its backups
319 * @state: Partition check state including device holding the LDM Database
320 * @ph1: Memory struct to fill with ph contents
321 *
322 * Read and compare all three privheads from disk.
323 *
324 * The privheads on disk show the size and location of the main disk area and
325 * the configuration area (the database). The values are range-checked against
326 * @hd, which contains the real size of the disk.
327 *
328 * Return: 'true' Success
329 * 'false' Error
330 */
331static bool ldm_validate_privheads(struct parsed_partitions *state,
332 struct privhead *ph1)
333{
334 static const int off[3] = { OFF_PRIV1, OFF_PRIV2, OFF_PRIV3 };
335 struct privhead *ph[3] = { ph1 };
336 Sector sect;
337 u8 *data;
338 bool result = false;
339 long num_sects;
340 int i;
341
342 BUG_ON (!state || !ph1);
343
344 ph[1] = kmalloc (sizeof (*ph[1]), GFP_KERNEL);
345 ph[2] = kmalloc (sizeof (*ph[2]), GFP_KERNEL);
346 if (!ph[1] || !ph[2]) {
347 ldm_crit ("Out of memory.");
348 goto out;
349 }
350
351 /* off[1 & 2] are relative to ph[0]->config_start */
352 ph[0]->config_start = 0;
353
354 /* Read and parse privheads */
355 for (i = 0; i < 3; i++) {
356 data = read_part_sector(state, ph[0]->config_start + off[i],
357 &sect);
358 if (!data) {
359 ldm_crit ("Disk read failed.");
360 goto out;
361 }
362 result = ldm_parse_privhead (data, ph[i]);
363 put_dev_sector (sect);
364 if (!result) {
365 ldm_error ("Cannot find PRIVHEAD %d.", i+1); /* Log again */
366 if (i < 2)
367 goto out; /* Already logged */
368 else
369 break; /* FIXME ignore for now, 3rd PH can fail on odd-sized disks */
370 }
371 }
372
373 num_sects = state->bdev->bd_inode->i_size >> 9;
374
375 if ((ph[0]->config_start > num_sects) ||
376 ((ph[0]->config_start + ph[0]->config_size) > num_sects)) {
377 ldm_crit ("Database extends beyond the end of the disk.");
378 goto out;
379 }
380
381 if ((ph[0]->logical_disk_start > ph[0]->config_start) ||
382 ((ph[0]->logical_disk_start + ph[0]->logical_disk_size)
383 > ph[0]->config_start)) {
384 ldm_crit ("Disk and database overlap.");
385 goto out;
386 }
387
388 if (!ldm_compare_privheads (ph[0], ph[1])) {
389 ldm_crit ("Primary and backup PRIVHEADs don't match.");
390 goto out;
391 }
392 /* FIXME ignore this for now
393 if (!ldm_compare_privheads (ph[0], ph[2])) {
394 ldm_crit ("Primary and backup PRIVHEADs don't match.");
395 goto out;
396 }*/
397 ldm_debug ("Validated PRIVHEADs successfully.");
398 result = true;
399out:
400 kfree (ph[1]);
401 kfree (ph[2]);
402 return result;
403}
404
405/**
406 * ldm_validate_tocblocks - Validate the table of contents and its backups
407 * @state: Partition check state including device holding the LDM Database
408 * @base: Offset, into @state->bdev, of the database
409 * @ldb: Cache of the database structures
410 *
411 * Find and compare the four tables of contents of the LDM Database stored on
412 * @state->bdev and return the parsed information into @toc1.
413 *
414 * The offsets and sizes of the configs are range-checked against a privhead.
415 *
416 * Return: 'true' @toc1 contains validated TOCBLOCK info
417 * 'false' @toc1 contents are undefined
418 */
419static bool ldm_validate_tocblocks(struct parsed_partitions *state,
420 unsigned long base, struct ldmdb *ldb)
421{
422 static const int off[4] = { OFF_TOCB1, OFF_TOCB2, OFF_TOCB3, OFF_TOCB4};
423 struct tocblock *tb[4];
424 struct privhead *ph;
425 Sector sect;
426 u8 *data;
427 int i, nr_tbs;
428 bool result = false;
429
430 BUG_ON(!state || !ldb);
431 ph = &ldb->ph;
432 tb[0] = &ldb->toc;
433 tb[1] = kmalloc(sizeof(*tb[1]) * 3, GFP_KERNEL);
434 if (!tb[1]) {
435 ldm_crit("Out of memory.");
436 goto err;
437 }
438 tb[2] = (struct tocblock*)((u8*)tb[1] + sizeof(*tb[1]));
439 tb[3] = (struct tocblock*)((u8*)tb[2] + sizeof(*tb[2]));
440 /*
441 * Try to read and parse all four TOCBLOCKs.
442 *
443 * Windows Vista LDM v2.12 does not always have all four TOCBLOCKs so
444 * skip any that fail as long as we get at least one valid TOCBLOCK.
445 */
446 for (nr_tbs = i = 0; i < 4; i++) {
447 data = read_part_sector(state, base + off[i], &sect);
448 if (!data) {
449 ldm_error("Disk read failed for TOCBLOCK %d.", i);
450 continue;
451 }
452 if (ldm_parse_tocblock(data, tb[nr_tbs]))
453 nr_tbs++;
454 put_dev_sector(sect);
455 }
456 if (!nr_tbs) {
457 ldm_crit("Failed to find a valid TOCBLOCK.");
458 goto err;
459 }
460 /* Range check the TOCBLOCK against a privhead. */
461 if (((tb[0]->bitmap1_start + tb[0]->bitmap1_size) > ph->config_size) ||
462 ((tb[0]->bitmap2_start + tb[0]->bitmap2_size) >
463 ph->config_size)) {
464 ldm_crit("The bitmaps are out of range. Giving up.");
465 goto err;
466 }
467 /* Compare all loaded TOCBLOCKs. */
468 for (i = 1; i < nr_tbs; i++) {
469 if (!ldm_compare_tocblocks(tb[0], tb[i])) {
470 ldm_crit("TOCBLOCKs 0 and %d do not match.", i);
471 goto err;
472 }
473 }
474 ldm_debug("Validated %d TOCBLOCKs successfully.", nr_tbs);
475 result = true;
476err:
477 kfree(tb[1]);
478 return result;
479}
480
481/**
482 * ldm_validate_vmdb - Read the VMDB and validate it
483 * @state: Partition check state including device holding the LDM Database
484 * @base: Offset, into @bdev, of the database
485 * @ldb: Cache of the database structures
486 *
487 * Find the vmdb of the LDM Database stored on @bdev and return the parsed
488 * information in @ldb.
489 *
490 * Return: 'true' @ldb contains validated VBDB info
491 * 'false' @ldb contents are undefined
492 */
493static bool ldm_validate_vmdb(struct parsed_partitions *state,
494 unsigned long base, struct ldmdb *ldb)
495{
496 Sector sect;
497 u8 *data;
498 bool result = false;
499 struct vmdb *vm;
500 struct tocblock *toc;
501
502 BUG_ON (!state || !ldb);
503
504 vm = &ldb->vm;
505 toc = &ldb->toc;
506
507 data = read_part_sector(state, base + OFF_VMDB, &sect);
508 if (!data) {
509 ldm_crit ("Disk read failed.");
510 return false;
511 }
512
513 if (!ldm_parse_vmdb (data, vm))
514 goto out; /* Already logged */
515
516 /* Are there uncommitted transactions? */
517 if (get_unaligned_be16(data + 0x10) != 0x01) {
518 ldm_crit ("Database is not in a consistent state. Aborting.");
519 goto out;
520 }
521
522 if (vm->vblk_offset != 512)
523 ldm_info ("VBLKs start at offset 0x%04x.", vm->vblk_offset);
524
525 /*
526 * The last_vblkd_seq can be before the end of the vmdb, just make sure
527 * it is not out of bounds.
528 */
529 if ((vm->vblk_size * vm->last_vblk_seq) > (toc->bitmap1_size << 9)) {
530 ldm_crit ("VMDB exceeds allowed size specified by TOCBLOCK. "
531 "Database is corrupt. Aborting.");
532 goto out;
533 }
534
535 result = true;
536out:
537 put_dev_sector (sect);
538 return result;
539}
540
541
542/**
543 * ldm_validate_partition_table - Determine whether bdev might be a dynamic disk
544 * @state: Partition check state including device holding the LDM Database
545 *
546 * This function provides a weak test to decide whether the device is a dynamic
547 * disk or not. It looks for an MS-DOS-style partition table containing at
548 * least one partition of type 0x42 (formerly SFS, now used by Windows for
549 * dynamic disks).
550 *
551 * N.B. The only possible error can come from the read_part_sector and that is
552 * only likely to happen if the underlying device is strange. If that IS
553 * the case we should return zero to let someone else try.
554 *
555 * Return: 'true' @state->bdev is a dynamic disk
556 * 'false' @state->bdev is not a dynamic disk, or an error occurred
557 */
558static bool ldm_validate_partition_table(struct parsed_partitions *state)
559{
560 Sector sect;
561 u8 *data;
562 struct partition *p;
563 int i;
564 bool result = false;
565
566 BUG_ON(!state);
567
568 data = read_part_sector(state, 0, &sect);
569 if (!data) {
570 ldm_info ("Disk read failed.");
571 return false;
572 }
573
574 if (*(__le16*) (data + 0x01FE) != cpu_to_le16 (MSDOS_LABEL_MAGIC))
575 goto out;
576
577 p = (struct partition*)(data + 0x01BE);
578 for (i = 0; i < 4; i++, p++)
579 if (SYS_IND (p) == LDM_PARTITION) {
580 result = true;
581 break;
582 }
583
584 if (result)
585 ldm_debug ("Found W2K dynamic disk partition type.");
586
587out:
588 put_dev_sector (sect);
589 return result;
590}
591
592/**
593 * ldm_get_disk_objid - Search a linked list of vblk's for a given Disk Id
594 * @ldb: Cache of the database structures
595 *
596 * The LDM Database contains a list of all partitions on all dynamic disks.
597 * The primary PRIVHEAD, at the beginning of the physical disk, tells us
598 * the GUID of this disk. This function searches for the GUID in a linked
599 * list of vblk's.
600 *
601 * Return: Pointer, A matching vblk was found
602 * NULL, No match, or an error
603 */
604static struct vblk * ldm_get_disk_objid (const struct ldmdb *ldb)
605{
606 struct list_head *item;
607
608 BUG_ON (!ldb);
609
610 list_for_each (item, &ldb->v_disk) {
611 struct vblk *v = list_entry (item, struct vblk, list);
612 if (!memcmp (v->vblk.disk.disk_id, ldb->ph.disk_id, GUID_SIZE))
613 return v;
614 }
615
616 return NULL;
617}
618
619/**
620 * ldm_create_data_partitions - Create data partitions for this device
621 * @pp: List of the partitions parsed so far
622 * @ldb: Cache of the database structures
623 *
624 * The database contains ALL the partitions for ALL disk groups, so we need to
625 * filter out this specific disk. Using the disk's object id, we can find all
626 * the partitions in the database that belong to this disk.
627 *
628 * Add each partition in our database, to the parsed_partitions structure.
629 *
630 * N.B. This function creates the partitions in the order it finds partition
631 * objects in the linked list.
632 *
633 * Return: 'true' Partition created
634 * 'false' Error, probably a range checking problem
635 */
636static bool ldm_create_data_partitions (struct parsed_partitions *pp,
637 const struct ldmdb *ldb)
638{
639 struct list_head *item;
640 struct vblk *vb;
641 struct vblk *disk;
642 struct vblk_part *part;
643 int part_num = 1;
644
645 BUG_ON (!pp || !ldb);
646
647 disk = ldm_get_disk_objid (ldb);
648 if (!disk) {
649 ldm_crit ("Can't find the ID of this disk in the database.");
650 return false;
651 }
652
653 strlcat(pp->pp_buf, " [LDM]", PAGE_SIZE);
654
655 /* Create the data partitions */
656 list_for_each (item, &ldb->v_part) {
657 vb = list_entry (item, struct vblk, list);
658 part = &vb->vblk.part;
659
660 if (part->disk_id != disk->obj_id)
661 continue;
662
663 put_partition (pp, part_num, ldb->ph.logical_disk_start +
664 part->start, part->size);
665 part_num++;
666 }
667
668 strlcat(pp->pp_buf, "\n", PAGE_SIZE);
669 return true;
670}
671
672
673/**
674 * ldm_relative - Calculate the next relative offset
675 * @buffer: Block of data being worked on
676 * @buflen: Size of the block of data
677 * @base: Size of the previous fixed width fields
678 * @offset: Cumulative size of the previous variable-width fields
679 *
680 * Because many of the VBLK fields are variable-width, it's necessary
681 * to calculate each offset based on the previous one and the length
682 * of the field it pointed to.
683 *
684 * Return: -1 Error, the calculated offset exceeded the size of the buffer
685 * n OK, a range-checked offset into buffer
686 */
687static int ldm_relative(const u8 *buffer, int buflen, int base, int offset)
688{
689
690 base += offset;
691 if (!buffer || offset < 0 || base > buflen) {
692 if (!buffer)
693 ldm_error("!buffer");
694 if (offset < 0)
695 ldm_error("offset (%d) < 0", offset);
696 if (base > buflen)
697 ldm_error("base (%d) > buflen (%d)", base, buflen);
698 return -1;
699 }
700 if (base + buffer[base] >= buflen) {
701 ldm_error("base (%d) + buffer[base] (%d) >= buflen (%d)", base,
702 buffer[base], buflen);
703 return -1;
704 }
705 return buffer[base] + offset + 1;
706}
707
708/**
709 * ldm_get_vnum - Convert a variable-width, big endian number, into cpu order
710 * @block: Pointer to the variable-width number to convert
711 *
712 * Large numbers in the LDM Database are often stored in a packed format. Each
713 * number is prefixed by a one byte width marker. All numbers in the database
714 * are stored in big-endian byte order. This function reads one of these
715 * numbers and returns the result
716 *
717 * N.B. This function DOES NOT perform any range checking, though the most
718 * it will read is eight bytes.
719 *
720 * Return: n A number
721 * 0 Zero, or an error occurred
722 */
723static u64 ldm_get_vnum (const u8 *block)
724{
725 u64 tmp = 0;
726 u8 length;
727
728 BUG_ON (!block);
729
730 length = *block++;
731
732 if (length && length <= 8)
733 while (length--)
734 tmp = (tmp << 8) | *block++;
735 else
736 ldm_error ("Illegal length %d.", length);
737
738 return tmp;
739}
740
741/**
742 * ldm_get_vstr - Read a length-prefixed string into a buffer
743 * @block: Pointer to the length marker
744 * @buffer: Location to copy string to
745 * @buflen: Size of the output buffer
746 *
747 * Many of the strings in the LDM Database are not NULL terminated. Instead
748 * they are prefixed by a one byte length marker. This function copies one of
749 * these strings into a buffer.
750 *
751 * N.B. This function DOES NOT perform any range checking on the input.
752 * If the buffer is too small, the output will be truncated.
753 *
754 * Return: 0, Error and @buffer contents are undefined
755 * n, String length in characters (excluding NULL)
756 * buflen-1, String was truncated.
757 */
758static int ldm_get_vstr (const u8 *block, u8 *buffer, int buflen)
759{
760 int length;
761
762 BUG_ON (!block || !buffer);
763
764 length = block[0];
765 if (length >= buflen) {
766 ldm_error ("Truncating string %d -> %d.", length, buflen);
767 length = buflen - 1;
768 }
769 memcpy (buffer, block + 1, length);
770 buffer[length] = 0;
771 return length;
772}
773
774
775/**
776 * ldm_parse_cmp3 - Read a raw VBLK Component object into a vblk structure
777 * @buffer: Block of data being worked on
778 * @buflen: Size of the block of data
779 * @vb: In-memory vblk in which to return information
780 *
781 * Read a raw VBLK Component object (version 3) into a vblk structure.
782 *
783 * Return: 'true' @vb contains a Component VBLK
784 * 'false' @vb contents are not defined
785 */
786static bool ldm_parse_cmp3 (const u8 *buffer, int buflen, struct vblk *vb)
787{
788 int r_objid, r_name, r_vstate, r_child, r_parent, r_stripe, r_cols, len;
789 struct vblk_comp *comp;
790
791 BUG_ON (!buffer || !vb);
792
793 r_objid = ldm_relative (buffer, buflen, 0x18, 0);
794 r_name = ldm_relative (buffer, buflen, 0x18, r_objid);
795 r_vstate = ldm_relative (buffer, buflen, 0x18, r_name);
796 r_child = ldm_relative (buffer, buflen, 0x1D, r_vstate);
797 r_parent = ldm_relative (buffer, buflen, 0x2D, r_child);
798
799 if (buffer[0x12] & VBLK_FLAG_COMP_STRIPE) {
800 r_stripe = ldm_relative (buffer, buflen, 0x2E, r_parent);
801 r_cols = ldm_relative (buffer, buflen, 0x2E, r_stripe);
802 len = r_cols;
803 } else {
804 r_stripe = 0;
805 r_cols = 0;
806 len = r_parent;
807 }
808 if (len < 0)
809 return false;
810
811 len += VBLK_SIZE_CMP3;
812 if (len != get_unaligned_be32(buffer + 0x14))
813 return false;
814
815 comp = &vb->vblk.comp;
816 ldm_get_vstr (buffer + 0x18 + r_name, comp->state,
817 sizeof (comp->state));
818 comp->type = buffer[0x18 + r_vstate];
819 comp->children = ldm_get_vnum (buffer + 0x1D + r_vstate);
820 comp->parent_id = ldm_get_vnum (buffer + 0x2D + r_child);
821 comp->chunksize = r_stripe ? ldm_get_vnum (buffer+r_parent+0x2E) : 0;
822
823 return true;
824}
825
826/**
827 * ldm_parse_dgr3 - Read a raw VBLK Disk Group object into a vblk structure
828 * @buffer: Block of data being worked on
829 * @buflen: Size of the block of data
830 * @vb: In-memory vblk in which to return information
831 *
832 * Read a raw VBLK Disk Group object (version 3) into a vblk structure.
833 *
834 * Return: 'true' @vb contains a Disk Group VBLK
835 * 'false' @vb contents are not defined
836 */
837static int ldm_parse_dgr3 (const u8 *buffer, int buflen, struct vblk *vb)
838{
839 int r_objid, r_name, r_diskid, r_id1, r_id2, len;
840 struct vblk_dgrp *dgrp;
841
842 BUG_ON (!buffer || !vb);
843
844 r_objid = ldm_relative (buffer, buflen, 0x18, 0);
845 r_name = ldm_relative (buffer, buflen, 0x18, r_objid);
846 r_diskid = ldm_relative (buffer, buflen, 0x18, r_name);
847
848 if (buffer[0x12] & VBLK_FLAG_DGR3_IDS) {
849 r_id1 = ldm_relative (buffer, buflen, 0x24, r_diskid);
850 r_id2 = ldm_relative (buffer, buflen, 0x24, r_id1);
851 len = r_id2;
852 } else {
853 r_id1 = 0;
854 r_id2 = 0;
855 len = r_diskid;
856 }
857 if (len < 0)
858 return false;
859
860 len += VBLK_SIZE_DGR3;
861 if (len != get_unaligned_be32(buffer + 0x14))
862 return false;
863
864 dgrp = &vb->vblk.dgrp;
865 ldm_get_vstr (buffer + 0x18 + r_name, dgrp->disk_id,
866 sizeof (dgrp->disk_id));
867 return true;
868}
869
870/**
871 * ldm_parse_dgr4 - Read a raw VBLK Disk Group object into a vblk structure
872 * @buffer: Block of data being worked on
873 * @buflen: Size of the block of data
874 * @vb: In-memory vblk in which to return information
875 *
876 * Read a raw VBLK Disk Group object (version 4) into a vblk structure.
877 *
878 * Return: 'true' @vb contains a Disk Group VBLK
879 * 'false' @vb contents are not defined
880 */
881static bool ldm_parse_dgr4 (const u8 *buffer, int buflen, struct vblk *vb)
882{
883 char buf[64];
884 int r_objid, r_name, r_id1, r_id2, len;
885 struct vblk_dgrp *dgrp;
886
887 BUG_ON (!buffer || !vb);
888
889 r_objid = ldm_relative (buffer, buflen, 0x18, 0);
890 r_name = ldm_relative (buffer, buflen, 0x18, r_objid);
891
892 if (buffer[0x12] & VBLK_FLAG_DGR4_IDS) {
893 r_id1 = ldm_relative (buffer, buflen, 0x44, r_name);
894 r_id2 = ldm_relative (buffer, buflen, 0x44, r_id1);
895 len = r_id2;
896 } else {
897 r_id1 = 0;
898 r_id2 = 0;
899 len = r_name;
900 }
901 if (len < 0)
902 return false;
903
904 len += VBLK_SIZE_DGR4;
905 if (len != get_unaligned_be32(buffer + 0x14))
906 return false;
907
908 dgrp = &vb->vblk.dgrp;
909
910 ldm_get_vstr (buffer + 0x18 + r_objid, buf, sizeof (buf));
911 return true;
912}
913
914/**
915 * ldm_parse_dsk3 - Read a raw VBLK Disk object into a vblk structure
916 * @buffer: Block of data being worked on
917 * @buflen: Size of the block of data
918 * @vb: In-memory vblk in which to return information
919 *
920 * Read a raw VBLK Disk object (version 3) into a vblk structure.
921 *
922 * Return: 'true' @vb contains a Disk VBLK
923 * 'false' @vb contents are not defined
924 */
925static bool ldm_parse_dsk3 (const u8 *buffer, int buflen, struct vblk *vb)
926{
927 int r_objid, r_name, r_diskid, r_altname, len;
928 struct vblk_disk *disk;
929
930 BUG_ON (!buffer || !vb);
931
932 r_objid = ldm_relative (buffer, buflen, 0x18, 0);
933 r_name = ldm_relative (buffer, buflen, 0x18, r_objid);
934 r_diskid = ldm_relative (buffer, buflen, 0x18, r_name);
935 r_altname = ldm_relative (buffer, buflen, 0x18, r_diskid);
936 len = r_altname;
937 if (len < 0)
938 return false;
939
940 len += VBLK_SIZE_DSK3;
941 if (len != get_unaligned_be32(buffer + 0x14))
942 return false;
943
944 disk = &vb->vblk.disk;
945 ldm_get_vstr (buffer + 0x18 + r_diskid, disk->alt_name,
946 sizeof (disk->alt_name));
947 if (!ldm_parse_guid (buffer + 0x19 + r_name, disk->disk_id))
948 return false;
949
950 return true;
951}
952
953/**
954 * ldm_parse_dsk4 - Read a raw VBLK Disk object into a vblk structure
955 * @buffer: Block of data being worked on
956 * @buflen: Size of the block of data
957 * @vb: In-memory vblk in which to return information
958 *
959 * Read a raw VBLK Disk object (version 4) into a vblk structure.
960 *
961 * Return: 'true' @vb contains a Disk VBLK
962 * 'false' @vb contents are not defined
963 */
964static bool ldm_parse_dsk4 (const u8 *buffer, int buflen, struct vblk *vb)
965{
966 int r_objid, r_name, len;
967 struct vblk_disk *disk;
968
969 BUG_ON (!buffer || !vb);
970
971 r_objid = ldm_relative (buffer, buflen, 0x18, 0);
972 r_name = ldm_relative (buffer, buflen, 0x18, r_objid);
973 len = r_name;
974 if (len < 0)
975 return false;
976
977 len += VBLK_SIZE_DSK4;
978 if (len != get_unaligned_be32(buffer + 0x14))
979 return false;
980
981 disk = &vb->vblk.disk;
982 memcpy (disk->disk_id, buffer + 0x18 + r_name, GUID_SIZE);
983 return true;
984}
985
986/**
987 * ldm_parse_prt3 - Read a raw VBLK Partition object into a vblk structure
988 * @buffer: Block of data being worked on
989 * @buflen: Size of the block of data
990 * @vb: In-memory vblk in which to return information
991 *
992 * Read a raw VBLK Partition object (version 3) into a vblk structure.
993 *
994 * Return: 'true' @vb contains a Partition VBLK
995 * 'false' @vb contents are not defined
996 */
997static bool ldm_parse_prt3(const u8 *buffer, int buflen, struct vblk *vb)
998{
999 int r_objid, r_name, r_size, r_parent, r_diskid, r_index, len;
1000 struct vblk_part *part;
1001
1002 BUG_ON(!buffer || !vb);
1003 r_objid = ldm_relative(buffer, buflen, 0x18, 0);
1004 if (r_objid < 0) {
1005 ldm_error("r_objid %d < 0", r_objid);
1006 return false;
1007 }
1008 r_name = ldm_relative(buffer, buflen, 0x18, r_objid);
1009 if (r_name < 0) {
1010 ldm_error("r_name %d < 0", r_name);
1011 return false;
1012 }
1013 r_size = ldm_relative(buffer, buflen, 0x34, r_name);
1014 if (r_size < 0) {
1015 ldm_error("r_size %d < 0", r_size);
1016 return false;
1017 }
1018 r_parent = ldm_relative(buffer, buflen, 0x34, r_size);
1019 if (r_parent < 0) {
1020 ldm_error("r_parent %d < 0", r_parent);
1021 return false;
1022 }
1023 r_diskid = ldm_relative(buffer, buflen, 0x34, r_parent);
1024 if (r_diskid < 0) {
1025 ldm_error("r_diskid %d < 0", r_diskid);
1026 return false;
1027 }
1028 if (buffer[0x12] & VBLK_FLAG_PART_INDEX) {
1029 r_index = ldm_relative(buffer, buflen, 0x34, r_diskid);
1030 if (r_index < 0) {
1031 ldm_error("r_index %d < 0", r_index);
1032 return false;
1033 }
1034 len = r_index;
1035 } else {
1036 r_index = 0;
1037 len = r_diskid;
1038 }
1039 if (len < 0) {
1040 ldm_error("len %d < 0", len);
1041 return false;
1042 }
1043 len += VBLK_SIZE_PRT3;
1044 if (len > get_unaligned_be32(buffer + 0x14)) {
1045 ldm_error("len %d > BE32(buffer + 0x14) %d", len,
1046 get_unaligned_be32(buffer + 0x14));
1047 return false;
1048 }
1049 part = &vb->vblk.part;
1050 part->start = get_unaligned_be64(buffer + 0x24 + r_name);
1051 part->volume_offset = get_unaligned_be64(buffer + 0x2C + r_name);
1052 part->size = ldm_get_vnum(buffer + 0x34 + r_name);
1053 part->parent_id = ldm_get_vnum(buffer + 0x34 + r_size);
1054 part->disk_id = ldm_get_vnum(buffer + 0x34 + r_parent);
1055 if (vb->flags & VBLK_FLAG_PART_INDEX)
1056 part->partnum = buffer[0x35 + r_diskid];
1057 else
1058 part->partnum = 0;
1059 return true;
1060}
1061
1062/**
1063 * ldm_parse_vol5 - Read a raw VBLK Volume object into a vblk structure
1064 * @buffer: Block of data being worked on
1065 * @buflen: Size of the block of data
1066 * @vb: In-memory vblk in which to return information
1067 *
1068 * Read a raw VBLK Volume object (version 5) into a vblk structure.
1069 *
1070 * Return: 'true' @vb contains a Volume VBLK
1071 * 'false' @vb contents are not defined
1072 */
1073static bool ldm_parse_vol5(const u8 *buffer, int buflen, struct vblk *vb)
1074{
1075 int r_objid, r_name, r_vtype, r_disable_drive_letter, r_child, r_size;
1076 int r_id1, r_id2, r_size2, r_drive, len;
1077 struct vblk_volu *volu;
1078
1079 BUG_ON(!buffer || !vb);
1080 r_objid = ldm_relative(buffer, buflen, 0x18, 0);
1081 if (r_objid < 0) {
1082 ldm_error("r_objid %d < 0", r_objid);
1083 return false;
1084 }
1085 r_name = ldm_relative(buffer, buflen, 0x18, r_objid);
1086 if (r_name < 0) {
1087 ldm_error("r_name %d < 0", r_name);
1088 return false;
1089 }
1090 r_vtype = ldm_relative(buffer, buflen, 0x18, r_name);
1091 if (r_vtype < 0) {
1092 ldm_error("r_vtype %d < 0", r_vtype);
1093 return false;
1094 }
1095 r_disable_drive_letter = ldm_relative(buffer, buflen, 0x18, r_vtype);
1096 if (r_disable_drive_letter < 0) {
1097 ldm_error("r_disable_drive_letter %d < 0",
1098 r_disable_drive_letter);
1099 return false;
1100 }
1101 r_child = ldm_relative(buffer, buflen, 0x2D, r_disable_drive_letter);
1102 if (r_child < 0) {
1103 ldm_error("r_child %d < 0", r_child);
1104 return false;
1105 }
1106 r_size = ldm_relative(buffer, buflen, 0x3D, r_child);
1107 if (r_size < 0) {
1108 ldm_error("r_size %d < 0", r_size);
1109 return false;
1110 }
1111 if (buffer[0x12] & VBLK_FLAG_VOLU_ID1) {
1112 r_id1 = ldm_relative(buffer, buflen, 0x52, r_size);
1113 if (r_id1 < 0) {
1114 ldm_error("r_id1 %d < 0", r_id1);
1115 return false;
1116 }
1117 } else
1118 r_id1 = r_size;
1119 if (buffer[0x12] & VBLK_FLAG_VOLU_ID2) {
1120 r_id2 = ldm_relative(buffer, buflen, 0x52, r_id1);
1121 if (r_id2 < 0) {
1122 ldm_error("r_id2 %d < 0", r_id2);
1123 return false;
1124 }
1125 } else
1126 r_id2 = r_id1;
1127 if (buffer[0x12] & VBLK_FLAG_VOLU_SIZE) {
1128 r_size2 = ldm_relative(buffer, buflen, 0x52, r_id2);
1129 if (r_size2 < 0) {
1130 ldm_error("r_size2 %d < 0", r_size2);
1131 return false;
1132 }
1133 } else
1134 r_size2 = r_id2;
1135 if (buffer[0x12] & VBLK_FLAG_VOLU_DRIVE) {
1136 r_drive = ldm_relative(buffer, buflen, 0x52, r_size2);
1137 if (r_drive < 0) {
1138 ldm_error("r_drive %d < 0", r_drive);
1139 return false;
1140 }
1141 } else
1142 r_drive = r_size2;
1143 len = r_drive;
1144 if (len < 0) {
1145 ldm_error("len %d < 0", len);
1146 return false;
1147 }
1148 len += VBLK_SIZE_VOL5;
1149 if (len > get_unaligned_be32(buffer + 0x14)) {
1150 ldm_error("len %d > BE32(buffer + 0x14) %d", len,
1151 get_unaligned_be32(buffer + 0x14));
1152 return false;
1153 }
1154 volu = &vb->vblk.volu;
1155 ldm_get_vstr(buffer + 0x18 + r_name, volu->volume_type,
1156 sizeof(volu->volume_type));
1157 memcpy(volu->volume_state, buffer + 0x18 + r_disable_drive_letter,
1158 sizeof(volu->volume_state));
1159 volu->size = ldm_get_vnum(buffer + 0x3D + r_child);
1160 volu->partition_type = buffer[0x41 + r_size];
1161 memcpy(volu->guid, buffer + 0x42 + r_size, sizeof(volu->guid));
1162 if (buffer[0x12] & VBLK_FLAG_VOLU_DRIVE) {
1163 ldm_get_vstr(buffer + 0x52 + r_size, volu->drive_hint,
1164 sizeof(volu->drive_hint));
1165 }
1166 return true;
1167}
1168
1169/**
1170 * ldm_parse_vblk - Read a raw VBLK object into a vblk structure
1171 * @buf: Block of data being worked on
1172 * @len: Size of the block of data
1173 * @vb: In-memory vblk in which to return information
1174 *
1175 * Read a raw VBLK object into a vblk structure. This function just reads the
1176 * information common to all VBLK types, then delegates the rest of the work to
1177 * helper functions: ldm_parse_*.
1178 *
1179 * Return: 'true' @vb contains a VBLK
1180 * 'false' @vb contents are not defined
1181 */
1182static bool ldm_parse_vblk (const u8 *buf, int len, struct vblk *vb)
1183{
1184 bool result = false;
1185 int r_objid;
1186
1187 BUG_ON (!buf || !vb);
1188
1189 r_objid = ldm_relative (buf, len, 0x18, 0);
1190 if (r_objid < 0) {
1191 ldm_error ("VBLK header is corrupt.");
1192 return false;
1193 }
1194
1195 vb->flags = buf[0x12];
1196 vb->type = buf[0x13];
1197 vb->obj_id = ldm_get_vnum (buf + 0x18);
1198 ldm_get_vstr (buf+0x18+r_objid, vb->name, sizeof (vb->name));
1199
1200 switch (vb->type) {
1201 case VBLK_CMP3: result = ldm_parse_cmp3 (buf, len, vb); break;
1202 case VBLK_DSK3: result = ldm_parse_dsk3 (buf, len, vb); break;
1203 case VBLK_DSK4: result = ldm_parse_dsk4 (buf, len, vb); break;
1204 case VBLK_DGR3: result = ldm_parse_dgr3 (buf, len, vb); break;
1205 case VBLK_DGR4: result = ldm_parse_dgr4 (buf, len, vb); break;
1206 case VBLK_PRT3: result = ldm_parse_prt3 (buf, len, vb); break;
1207 case VBLK_VOL5: result = ldm_parse_vol5 (buf, len, vb); break;
1208 }
1209
1210 if (result)
1211 ldm_debug ("Parsed VBLK 0x%llx (type: 0x%02x) ok.",
1212 (unsigned long long) vb->obj_id, vb->type);
1213 else
1214 ldm_error ("Failed to parse VBLK 0x%llx (type: 0x%02x).",
1215 (unsigned long long) vb->obj_id, vb->type);
1216
1217 return result;
1218}
1219
1220
1221/**
1222 * ldm_ldmdb_add - Adds a raw VBLK entry to the ldmdb database
1223 * @data: Raw VBLK to add to the database
1224 * @len: Size of the raw VBLK
1225 * @ldb: Cache of the database structures
1226 *
1227 * The VBLKs are sorted into categories. Partitions are also sorted by offset.
1228 *
1229 * N.B. This function does not check the validity of the VBLKs.
1230 *
1231 * Return: 'true' The VBLK was added
1232 * 'false' An error occurred
1233 */
1234static bool ldm_ldmdb_add (u8 *data, int len, struct ldmdb *ldb)
1235{
1236 struct vblk *vb;
1237 struct list_head *item;
1238
1239 BUG_ON (!data || !ldb);
1240
1241 vb = kmalloc (sizeof (*vb), GFP_KERNEL);
1242 if (!vb) {
1243 ldm_crit ("Out of memory.");
1244 return false;
1245 }
1246
1247 if (!ldm_parse_vblk (data, len, vb)) {
1248 kfree(vb);
1249 return false; /* Already logged */
1250 }
1251
1252 /* Put vblk into the correct list. */
1253 switch (vb->type) {
1254 case VBLK_DGR3:
1255 case VBLK_DGR4:
1256 list_add (&vb->list, &ldb->v_dgrp);
1257 break;
1258 case VBLK_DSK3:
1259 case VBLK_DSK4:
1260 list_add (&vb->list, &ldb->v_disk);
1261 break;
1262 case VBLK_VOL5:
1263 list_add (&vb->list, &ldb->v_volu);
1264 break;
1265 case VBLK_CMP3:
1266 list_add (&vb->list, &ldb->v_comp);
1267 break;
1268 case VBLK_PRT3:
1269 /* Sort by the partition's start sector. */
1270 list_for_each (item, &ldb->v_part) {
1271 struct vblk *v = list_entry (item, struct vblk, list);
1272 if ((v->vblk.part.disk_id == vb->vblk.part.disk_id) &&
1273 (v->vblk.part.start > vb->vblk.part.start)) {
1274 list_add_tail (&vb->list, &v->list);
1275 return true;
1276 }
1277 }
1278 list_add_tail (&vb->list, &ldb->v_part);
1279 break;
1280 }
1281 return true;
1282}
1283
1284/**
1285 * ldm_frag_add - Add a VBLK fragment to a list
1286 * @data: Raw fragment to be added to the list
1287 * @size: Size of the raw fragment
1288 * @frags: Linked list of VBLK fragments
1289 *
1290 * Fragmented VBLKs may not be consecutive in the database, so they are placed
1291 * in a list so they can be pieced together later.
1292 *
1293 * Return: 'true' Success, the VBLK was added to the list
1294 * 'false' Error, a problem occurred
1295 */
1296static bool ldm_frag_add (const u8 *data, int size, struct list_head *frags)
1297{
1298 struct frag *f;
1299 struct list_head *item;
1300 int rec, num, group;
1301
1302 BUG_ON (!data || !frags);
1303
1304 if (size < 2 * VBLK_SIZE_HEAD) {
1305 ldm_error("Value of size is to small.");
1306 return false;
1307 }
1308
1309 group = get_unaligned_be32(data + 0x08);
1310 rec = get_unaligned_be16(data + 0x0C);
1311 num = get_unaligned_be16(data + 0x0E);
1312 if ((num < 1) || (num > 4)) {
1313 ldm_error ("A VBLK claims to have %d parts.", num);
1314 return false;
1315 }
1316 if (rec >= num) {
1317 ldm_error("REC value (%d) exceeds NUM value (%d)", rec, num);
1318 return false;
1319 }
1320
1321 list_for_each (item, frags) {
1322 f = list_entry (item, struct frag, list);
1323 if (f->group == group)
1324 goto found;
1325 }
1326
1327 f = kmalloc (sizeof (*f) + size*num, GFP_KERNEL);
1328 if (!f) {
1329 ldm_crit ("Out of memory.");
1330 return false;
1331 }
1332
1333 f->group = group;
1334 f->num = num;
1335 f->rec = rec;
1336 f->map = 0xFF << num;
1337
1338 list_add_tail (&f->list, frags);
1339found:
1340 if (rec >= f->num) {
1341 ldm_error("REC value (%d) exceeds NUM value (%d)", rec, f->num);
1342 return false;
1343 }
1344
1345 if (f->map & (1 << rec)) {
1346 ldm_error ("Duplicate VBLK, part %d.", rec);
1347 f->map &= 0x7F; /* Mark the group as broken */
1348 return false;
1349 }
1350
1351 f->map |= (1 << rec);
1352
1353 data += VBLK_SIZE_HEAD;
1354 size -= VBLK_SIZE_HEAD;
1355
1356 memcpy (f->data+rec*(size-VBLK_SIZE_HEAD)+VBLK_SIZE_HEAD, data, size);
1357
1358 return true;
1359}
1360
1361/**
1362 * ldm_frag_free - Free a linked list of VBLK fragments
1363 * @list: Linked list of fragments
1364 *
1365 * Free a linked list of VBLK fragments
1366 *
1367 * Return: none
1368 */
1369static void ldm_frag_free (struct list_head *list)
1370{
1371 struct list_head *item, *tmp;
1372
1373 BUG_ON (!list);
1374
1375 list_for_each_safe (item, tmp, list)
1376 kfree (list_entry (item, struct frag, list));
1377}
1378
1379/**
1380 * ldm_frag_commit - Validate fragmented VBLKs and add them to the database
1381 * @frags: Linked list of VBLK fragments
1382 * @ldb: Cache of the database structures
1383 *
1384 * Now that all the fragmented VBLKs have been collected, they must be added to
1385 * the database for later use.
1386 *
1387 * Return: 'true' All the fragments we added successfully
1388 * 'false' One or more of the fragments we invalid
1389 */
1390static bool ldm_frag_commit (struct list_head *frags, struct ldmdb *ldb)
1391{
1392 struct frag *f;
1393 struct list_head *item;
1394
1395 BUG_ON (!frags || !ldb);
1396
1397 list_for_each (item, frags) {
1398 f = list_entry (item, struct frag, list);
1399
1400 if (f->map != 0xFF) {
1401 ldm_error ("VBLK group %d is incomplete (0x%02x).",
1402 f->group, f->map);
1403 return false;
1404 }
1405
1406 if (!ldm_ldmdb_add (f->data, f->num*ldb->vm.vblk_size, ldb))
1407 return false; /* Already logged */
1408 }
1409 return true;
1410}
1411
1412/**
1413 * ldm_get_vblks - Read the on-disk database of VBLKs into memory
1414 * @state: Partition check state including device holding the LDM Database
1415 * @base: Offset, into @state->bdev, of the database
1416 * @ldb: Cache of the database structures
1417 *
1418 * To use the information from the VBLKs, they need to be read from the disk,
1419 * unpacked and validated. We cache them in @ldb according to their type.
1420 *
1421 * Return: 'true' All the VBLKs were read successfully
1422 * 'false' An error occurred
1423 */
1424static bool ldm_get_vblks(struct parsed_partitions *state, unsigned long base,
1425 struct ldmdb *ldb)
1426{
1427 int size, perbuf, skip, finish, s, v, recs;
1428 u8 *data = NULL;
1429 Sector sect;
1430 bool result = false;
1431 LIST_HEAD (frags);
1432
1433 BUG_ON(!state || !ldb);
1434
1435 size = ldb->vm.vblk_size;
1436 perbuf = 512 / size;
1437 skip = ldb->vm.vblk_offset >> 9; /* Bytes to sectors */
1438 finish = (size * ldb->vm.last_vblk_seq) >> 9;
1439
1440 for (s = skip; s < finish; s++) { /* For each sector */
1441 data = read_part_sector(state, base + OFF_VMDB + s, &sect);
1442 if (!data) {
1443 ldm_crit ("Disk read failed.");
1444 goto out;
1445 }
1446
1447 for (v = 0; v < perbuf; v++, data+=size) { /* For each vblk */
1448 if (MAGIC_VBLK != get_unaligned_be32(data)) {
1449 ldm_error ("Expected to find a VBLK.");
1450 goto out;
1451 }
1452
1453 recs = get_unaligned_be16(data + 0x0E); /* Number of records */
1454 if (recs == 1) {
1455 if (!ldm_ldmdb_add (data, size, ldb))
1456 goto out; /* Already logged */
1457 } else if (recs > 1) {
1458 if (!ldm_frag_add (data, size, &frags))
1459 goto out; /* Already logged */
1460 }
1461 /* else Record is not in use, ignore it. */
1462 }
1463 put_dev_sector (sect);
1464 data = NULL;
1465 }
1466
1467 result = ldm_frag_commit (&frags, ldb); /* Failures, already logged */
1468out:
1469 if (data)
1470 put_dev_sector (sect);
1471 ldm_frag_free (&frags);
1472
1473 return result;
1474}
1475
1476/**
1477 * ldm_free_vblks - Free a linked list of vblk's
1478 * @lh: Head of a linked list of struct vblk
1479 *
1480 * Free a list of vblk's and free the memory used to maintain the list.
1481 *
1482 * Return: none
1483 */
1484static void ldm_free_vblks (struct list_head *lh)
1485{
1486 struct list_head *item, *tmp;
1487
1488 BUG_ON (!lh);
1489
1490 list_for_each_safe (item, tmp, lh)
1491 kfree (list_entry (item, struct vblk, list));
1492}
1493
1494
1495/**
1496 * ldm_partition - Find out whether a device is a dynamic disk and handle it
1497 * @state: Partition check state including device holding the LDM Database
1498 *
1499 * This determines whether the device @bdev is a dynamic disk and if so creates
1500 * the partitions necessary in the gendisk structure pointed to by @hd.
1501 *
1502 * We create a dummy device 1, which contains the LDM database, and then create
1503 * each partition described by the LDM database in sequence as devices 2+. For
1504 * example, if the device is hda, we would have: hda1: LDM database, hda2, hda3,
1505 * and so on: the actual data containing partitions.
1506 *
1507 * Return: 1 Success, @state->bdev is a dynamic disk and we handled it
1508 * 0 Success, @state->bdev is not a dynamic disk
1509 * -1 An error occurred before enough information had been read
1510 * Or @state->bdev is a dynamic disk, but it may be corrupted
1511 */
1512int ldm_partition(struct parsed_partitions *state)
1513{
1514 struct ldmdb *ldb;
1515 unsigned long base;
1516 int result = -1;
1517
1518 BUG_ON(!state);
1519
1520 /* Look for signs of a Dynamic Disk */
1521 if (!ldm_validate_partition_table(state))
1522 return 0;
1523
1524 ldb = kmalloc (sizeof (*ldb), GFP_KERNEL);
1525 if (!ldb) {
1526 ldm_crit ("Out of memory.");
1527 goto out;
1528 }
1529
1530 /* Parse and check privheads. */
1531 if (!ldm_validate_privheads(state, &ldb->ph))
1532 goto out; /* Already logged */
1533
1534 /* All further references are relative to base (database start). */
1535 base = ldb->ph.config_start;
1536
1537 /* Parse and check tocs and vmdb. */
1538 if (!ldm_validate_tocblocks(state, base, ldb) ||
1539 !ldm_validate_vmdb(state, base, ldb))
1540 goto out; /* Already logged */
1541
1542 /* Initialize vblk lists in ldmdb struct */
1543 INIT_LIST_HEAD (&ldb->v_dgrp);
1544 INIT_LIST_HEAD (&ldb->v_disk);
1545 INIT_LIST_HEAD (&ldb->v_volu);
1546 INIT_LIST_HEAD (&ldb->v_comp);
1547 INIT_LIST_HEAD (&ldb->v_part);
1548
1549 if (!ldm_get_vblks(state, base, ldb)) {
1550 ldm_crit ("Failed to read the VBLKs from the database.");
1551 goto cleanup;
1552 }
1553
1554 /* Finally, create the data partition devices. */
1555 if (ldm_create_data_partitions(state, ldb)) {
1556 ldm_debug ("Parsed LDM database successfully.");
1557 result = 1;
1558 }
1559 /* else Already logged */
1560
1561cleanup:
1562 ldm_free_vblks (&ldb->v_dgrp);
1563 ldm_free_vblks (&ldb->v_disk);
1564 ldm_free_vblks (&ldb->v_volu);
1565 ldm_free_vblks (&ldb->v_comp);
1566 ldm_free_vblks (&ldb->v_part);
1567out:
1568 kfree (ldb);
1569 return result;
1570}
diff --git a/block/partitions/ldm.h b/block/partitions/ldm.h
new file mode 100644
index 000000000000..374242c0971a
--- /dev/null
+++ b/block/partitions/ldm.h
@@ -0,0 +1,215 @@
1/**
2 * ldm - Part of the Linux-NTFS project.
3 *
4 * Copyright (C) 2001,2002 Richard Russon <ldm@flatcap.org>
5 * Copyright (c) 2001-2007 Anton Altaparmakov
6 * Copyright (C) 2001,2002 Jakob Kemi <jakob.kemi@telia.com>
7 *
8 * Documentation is available at http://www.linux-ntfs.org/doku.php?id=downloads
9 *
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the Free
12 * Software Foundation; either version 2 of the License, or (at your option)
13 * any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program (in the main directory of the Linux-NTFS source
22 * in the file COPYING); if not, write to the Free Software Foundation,
23 * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 */
25
26#ifndef _FS_PT_LDM_H_
27#define _FS_PT_LDM_H_
28
29#include <linux/types.h>
30#include <linux/list.h>
31#include <linux/genhd.h>
32#include <linux/fs.h>
33#include <asm/unaligned.h>
34#include <asm/byteorder.h>
35
36struct parsed_partitions;
37
38/* Magic numbers in CPU format. */
39#define MAGIC_VMDB 0x564D4442 /* VMDB */
40#define MAGIC_VBLK 0x56424C4B /* VBLK */
41#define MAGIC_PRIVHEAD 0x5052495648454144ULL /* PRIVHEAD */
42#define MAGIC_TOCBLOCK 0x544F43424C4F434BULL /* TOCBLOCK */
43
44/* The defined vblk types. */
45#define VBLK_VOL5 0x51 /* Volume, version 5 */
46#define VBLK_CMP3 0x32 /* Component, version 3 */
47#define VBLK_PRT3 0x33 /* Partition, version 3 */
48#define VBLK_DSK3 0x34 /* Disk, version 3 */
49#define VBLK_DSK4 0x44 /* Disk, version 4 */
50#define VBLK_DGR3 0x35 /* Disk Group, version 3 */
51#define VBLK_DGR4 0x45 /* Disk Group, version 4 */
52
53/* vblk flags indicating extra information will be present */
54#define VBLK_FLAG_COMP_STRIPE 0x10
55#define VBLK_FLAG_PART_INDEX 0x08
56#define VBLK_FLAG_DGR3_IDS 0x08
57#define VBLK_FLAG_DGR4_IDS 0x08
58#define VBLK_FLAG_VOLU_ID1 0x08
59#define VBLK_FLAG_VOLU_ID2 0x20
60#define VBLK_FLAG_VOLU_SIZE 0x80
61#define VBLK_FLAG_VOLU_DRIVE 0x02
62
63/* size of a vblk's static parts */
64#define VBLK_SIZE_HEAD 16
65#define VBLK_SIZE_CMP3 22 /* Name and version */
66#define VBLK_SIZE_DGR3 12
67#define VBLK_SIZE_DGR4 44
68#define VBLK_SIZE_DSK3 12
69#define VBLK_SIZE_DSK4 45
70#define VBLK_SIZE_PRT3 28
71#define VBLK_SIZE_VOL5 58
72
73/* component types */
74#define COMP_STRIPE 0x01 /* Stripe-set */
75#define COMP_BASIC 0x02 /* Basic disk */
76#define COMP_RAID 0x03 /* Raid-set */
77
78/* Other constants. */
79#define LDM_DB_SIZE 2048 /* Size in sectors (= 1MiB). */
80
81#define OFF_PRIV1 6 /* Offset of the first privhead
82 relative to the start of the
83 device in sectors */
84
85/* Offsets to structures within the LDM Database in sectors. */
86#define OFF_PRIV2 1856 /* Backup private headers. */
87#define OFF_PRIV3 2047
88
89#define OFF_TOCB1 1 /* Tables of contents. */
90#define OFF_TOCB2 2
91#define OFF_TOCB3 2045
92#define OFF_TOCB4 2046
93
94#define OFF_VMDB 17 /* List of partitions. */
95
96#define LDM_PARTITION 0x42 /* Formerly SFS (Landis). */
97
98#define TOC_BITMAP1 "config" /* Names of the two defined */
99#define TOC_BITMAP2 "log" /* bitmaps in the TOCBLOCK. */
100
101/* Borrowed from msdos.c */
102#define SYS_IND(p) (get_unaligned(&(p)->sys_ind))
103
104struct frag { /* VBLK Fragment handling */
105 struct list_head list;
106 u32 group;
107 u8 num; /* Total number of records */
108 u8 rec; /* This is record number n */
109 u8 map; /* Which portions are in use */
110 u8 data[0];
111};
112
113/* In memory LDM database structures. */
114
115#define GUID_SIZE 16
116
117struct privhead { /* Offsets and sizes are in sectors. */
118 u16 ver_major;
119 u16 ver_minor;
120 u64 logical_disk_start;
121 u64 logical_disk_size;
122 u64 config_start;
123 u64 config_size;
124 u8 disk_id[GUID_SIZE];
125};
126
127struct tocblock { /* We have exactly two bitmaps. */
128 u8 bitmap1_name[16];
129 u64 bitmap1_start;
130 u64 bitmap1_size;
131 u8 bitmap2_name[16];
132 u64 bitmap2_start;
133 u64 bitmap2_size;
134};
135
136struct vmdb { /* VMDB: The database header */
137 u16 ver_major;
138 u16 ver_minor;
139 u32 vblk_size;
140 u32 vblk_offset;
141 u32 last_vblk_seq;
142};
143
144struct vblk_comp { /* VBLK Component */
145 u8 state[16];
146 u64 parent_id;
147 u8 type;
148 u8 children;
149 u16 chunksize;
150};
151
152struct vblk_dgrp { /* VBLK Disk Group */
153 u8 disk_id[64];
154};
155
156struct vblk_disk { /* VBLK Disk */
157 u8 disk_id[GUID_SIZE];
158 u8 alt_name[128];
159};
160
161struct vblk_part { /* VBLK Partition */
162 u64 start;
163 u64 size; /* start, size and vol_off in sectors */
164 u64 volume_offset;
165 u64 parent_id;
166 u64 disk_id;
167 u8 partnum;
168};
169
170struct vblk_volu { /* VBLK Volume */
171 u8 volume_type[16];
172 u8 volume_state[16];
173 u8 guid[16];
174 u8 drive_hint[4];
175 u64 size;
176 u8 partition_type;
177};
178
179struct vblk_head { /* VBLK standard header */
180 u32 group;
181 u16 rec;
182 u16 nrec;
183};
184
185struct vblk { /* Generalised VBLK */
186 u8 name[64];
187 u64 obj_id;
188 u32 sequence;
189 u8 flags;
190 u8 type;
191 union {
192 struct vblk_comp comp;
193 struct vblk_dgrp dgrp;
194 struct vblk_disk disk;
195 struct vblk_part part;
196 struct vblk_volu volu;
197 } vblk;
198 struct list_head list;
199};
200
201struct ldmdb { /* Cache of the database */
202 struct privhead ph;
203 struct tocblock toc;
204 struct vmdb vm;
205 struct list_head v_dgrp;
206 struct list_head v_disk;
207 struct list_head v_volu;
208 struct list_head v_comp;
209 struct list_head v_part;
210};
211
212int ldm_partition(struct parsed_partitions *state);
213
214#endif /* _FS_PT_LDM_H_ */
215
diff --git a/block/partitions/mac.c b/block/partitions/mac.c
new file mode 100644
index 000000000000..11f688bd76c5
--- /dev/null
+++ b/block/partitions/mac.c
@@ -0,0 +1,134 @@
1/*
2 * fs/partitions/mac.c
3 *
4 * Code extracted from drivers/block/genhd.c
5 * Copyright (C) 1991-1998 Linus Torvalds
6 * Re-organised Feb 1998 Russell King
7 */
8
9#include <linux/ctype.h>
10#include "check.h"
11#include "mac.h"
12
13#ifdef CONFIG_PPC_PMAC
14#include <asm/machdep.h>
15extern void note_bootable_part(dev_t dev, int part, int goodness);
16#endif
17
18/*
19 * Code to understand MacOS partition tables.
20 */
21
22static inline void mac_fix_string(char *stg, int len)
23{
24 int i;
25
26 for (i = len - 1; i >= 0 && stg[i] == ' '; i--)
27 stg[i] = 0;
28}
29
30int mac_partition(struct parsed_partitions *state)
31{
32 Sector sect;
33 unsigned char *data;
34 int slot, blocks_in_map;
35 unsigned secsize;
36#ifdef CONFIG_PPC_PMAC
37 int found_root = 0;
38 int found_root_goodness = 0;
39#endif
40 struct mac_partition *part;
41 struct mac_driver_desc *md;
42
43 /* Get 0th block and look at the first partition map entry. */
44 md = read_part_sector(state, 0, &sect);
45 if (!md)
46 return -1;
47 if (be16_to_cpu(md->signature) != MAC_DRIVER_MAGIC) {
48 put_dev_sector(sect);
49 return 0;
50 }
51 secsize = be16_to_cpu(md->block_size);
52 put_dev_sector(sect);
53 data = read_part_sector(state, secsize/512, &sect);
54 if (!data)
55 return -1;
56 part = (struct mac_partition *) (data + secsize%512);
57 if (be16_to_cpu(part->signature) != MAC_PARTITION_MAGIC) {
58 put_dev_sector(sect);
59 return 0; /* not a MacOS disk */
60 }
61 blocks_in_map = be32_to_cpu(part->map_count);
62 if (blocks_in_map < 0 || blocks_in_map >= DISK_MAX_PARTS) {
63 put_dev_sector(sect);
64 return 0;
65 }
66 strlcat(state->pp_buf, " [mac]", PAGE_SIZE);
67 for (slot = 1; slot <= blocks_in_map; ++slot) {
68 int pos = slot * secsize;
69 put_dev_sector(sect);
70 data = read_part_sector(state, pos/512, &sect);
71 if (!data)
72 return -1;
73 part = (struct mac_partition *) (data + pos%512);
74 if (be16_to_cpu(part->signature) != MAC_PARTITION_MAGIC)
75 break;
76 put_partition(state, slot,
77 be32_to_cpu(part->start_block) * (secsize/512),
78 be32_to_cpu(part->block_count) * (secsize/512));
79
80 if (!strnicmp(part->type, "Linux_RAID", 10))
81 state->parts[slot].flags = ADDPART_FLAG_RAID;
82#ifdef CONFIG_PPC_PMAC
83 /*
84 * If this is the first bootable partition, tell the
85 * setup code, in case it wants to make this the root.
86 */
87 if (machine_is(powermac)) {
88 int goodness = 0;
89
90 mac_fix_string(part->processor, 16);
91 mac_fix_string(part->name, 32);
92 mac_fix_string(part->type, 32);
93
94 if ((be32_to_cpu(part->status) & MAC_STATUS_BOOTABLE)
95 && strcasecmp(part->processor, "powerpc") == 0)
96 goodness++;
97
98 if (strcasecmp(part->type, "Apple_UNIX_SVR2") == 0
99 || (strnicmp(part->type, "Linux", 5) == 0
100 && strcasecmp(part->type, "Linux_swap") != 0)) {
101 int i, l;
102
103 goodness++;
104 l = strlen(part->name);
105 if (strcmp(part->name, "/") == 0)
106 goodness++;
107 for (i = 0; i <= l - 4; ++i) {
108 if (strnicmp(part->name + i, "root",
109 4) == 0) {
110 goodness += 2;
111 break;
112 }
113 }
114 if (strnicmp(part->name, "swap", 4) == 0)
115 goodness--;
116 }
117
118 if (goodness > found_root_goodness) {
119 found_root = slot;
120 found_root_goodness = goodness;
121 }
122 }
123#endif /* CONFIG_PPC_PMAC */
124 }
125#ifdef CONFIG_PPC_PMAC
126 if (found_root_goodness)
127 note_bootable_part(state->bdev->bd_dev, found_root,
128 found_root_goodness);
129#endif
130
131 put_dev_sector(sect);
132 strlcat(state->pp_buf, "\n", PAGE_SIZE);
133 return 1;
134}
diff --git a/block/partitions/mac.h b/block/partitions/mac.h
new file mode 100644
index 000000000000..3c7d98436380
--- /dev/null
+++ b/block/partitions/mac.h
@@ -0,0 +1,44 @@
1/*
2 * fs/partitions/mac.h
3 */
4
5#define MAC_PARTITION_MAGIC 0x504d
6
7/* type field value for A/UX or other Unix partitions */
8#define APPLE_AUX_TYPE "Apple_UNIX_SVR2"
9
10struct mac_partition {
11 __be16 signature; /* expected to be MAC_PARTITION_MAGIC */
12 __be16 res1;
13 __be32 map_count; /* # blocks in partition map */
14 __be32 start_block; /* absolute starting block # of partition */
15 __be32 block_count; /* number of blocks in partition */
16 char name[32]; /* partition name */
17 char type[32]; /* string type description */
18 __be32 data_start; /* rel block # of first data block */
19 __be32 data_count; /* number of data blocks */
20 __be32 status; /* partition status bits */
21 __be32 boot_start;
22 __be32 boot_size;
23 __be32 boot_load;
24 __be32 boot_load2;
25 __be32 boot_entry;
26 __be32 boot_entry2;
27 __be32 boot_cksum;
28 char processor[16]; /* identifies ISA of boot */
29 /* there is more stuff after this that we don't need */
30};
31
32#define MAC_STATUS_BOOTABLE 8 /* partition is bootable */
33
34#define MAC_DRIVER_MAGIC 0x4552
35
36/* Driver descriptor structure, in block 0 */
37struct mac_driver_desc {
38 __be16 signature; /* expected to be MAC_DRIVER_MAGIC */
39 __be16 block_size;
40 __be32 block_count;
41 /* ... more stuff */
42};
43
44int mac_partition(struct parsed_partitions *state);
diff --git a/block/partitions/msdos.c b/block/partitions/msdos.c
new file mode 100644
index 000000000000..5f79a6677c69
--- /dev/null
+++ b/block/partitions/msdos.c
@@ -0,0 +1,552 @@
1/*
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 */
21#include <linux/msdos_fs.h>
22
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
34#define SYS_IND(p) get_unaligned(&p->sys_ind)
35
36static 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}
45
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
62/* 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
67static int aix_magic_present(struct parsed_partitions *state, unsigned char *p)
68{
69 struct partition *pt = (struct partition *) (p + 0x1be);
70 Sector sect;
71 unsigned char *d;
72 int slot, ret = 0;
73
74 if (!(p[0] == AIX_LABEL_MAGIC1 &&
75 p[1] == AIX_LABEL_MAGIC2 &&
76 p[2] == AIX_LABEL_MAGIC3 &&
77 p[3] == AIX_LABEL_MAGIC4))
78 return 0;
79 /* 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 }
88 d = read_part_sector(state, 7, &sect);
89 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
97/*
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
108static void parse_extended(struct parsed_partitions *state,
109 sector_t first_sector, sector_t first_size)
110{
111 struct partition *p;
112 Sector sect;
113 unsigned char *data;
114 sector_t this_sector, this_size;
115 sector_t sector_size = bdev_logical_block_size(state->bdev) / 512;
116 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;
128 data = read_part_sector(state, this_sector, &sect);
129 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++) {
150 sector_t offs, size, next;
151 if (!nr_sects(p) || is_extended_partition(p))
152 continue;
153
154 /* Check the 3rd and 4th entries -
155 these sometimes contain random garbage */
156 offs = start_sect(p)*sector_size;
157 size = nr_sects(p)*sector_size;
158 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)
170 state->parts[state->next].flags = ADDPART_FLAG_RAID;
171 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++)
184 if (nr_sects(p) && is_extended_partition(p))
185 break;
186 if (i == 4)
187 goto done; /* nothing left to do */
188
189 this_sector = first_sector + start_sect(p) * sector_size;
190 this_size = nr_sects(p) * sector_size;
191 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
200static void parse_solaris_x86(struct parsed_partitions *state,
201 sector_t offset, sector_t size, int origin)
202{
203#ifdef CONFIG_SOLARIS_X86_PARTITION
204 Sector sect;
205 struct solaris_x86_vtoc *v;
206 int i;
207 short max_nparts;
208
209 v = read_part_sector(state, offset + 1, &sect);
210 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 {
217 char tmp[1 + BDEVNAME_SIZE + 10 + 11 + 1];
218
219 snprintf(tmp, sizeof(tmp), " %s%d: <solaris:", state->name, origin);
220 strlcat(state->pp_buf, tmp, PAGE_SIZE);
221 }
222 if (le32_to_cpu(v->v_version) != 1) {
223 char tmp[64];
224
225 snprintf(tmp, sizeof(tmp), " cannot handle version %d vtoc>\n",
226 le32_to_cpu(v->v_version));
227 strlcat(state->pp_buf, tmp, PAGE_SIZE);
228 put_dev_sector(sect);
229 return;
230 }
231 /* Ensure we can handle previous case of VTOC with 8 entries gracefully */
232 max_nparts = le16_to_cpu (v->v_nparts) > 8 ? SOLARIS_X86_NUMSLICE : 8;
233 for (i=0; i<max_nparts && state->next<state->limit; i++) {
234 struct solaris_x86_slice *s = &v->v_slice[i];
235 char tmp[3 + 10 + 1 + 1];
236
237 if (s->s_size == 0)
238 continue;
239 snprintf(tmp, sizeof(tmp), " [s%d]", i);
240 strlcat(state->pp_buf, tmp, PAGE_SIZE);
241 /* solaris partitions are relative to current MS-DOS
242 * one; must add the offset of the current partition */
243 put_partition(state, state->next++,
244 le32_to_cpu(s->s_start)+offset,
245 le32_to_cpu(s->s_size));
246 }
247 put_dev_sector(sect);
248 strlcat(state->pp_buf, " >\n", PAGE_SIZE);
249#endif
250}
251
252#if defined(CONFIG_BSD_DISKLABEL)
253/*
254 * Create devices for BSD partitions listed in a disklabel, under a
255 * dos-like partition. See parse_extended() for more information.
256 */
257static void parse_bsd(struct parsed_partitions *state,
258 sector_t offset, sector_t size, int origin, char *flavour,
259 int max_partitions)
260{
261 Sector sect;
262 struct bsd_disklabel *l;
263 struct bsd_partition *p;
264 char tmp[64];
265
266 l = read_part_sector(state, offset + 1, &sect);
267 if (!l)
268 return;
269 if (le32_to_cpu(l->d_magic) != BSD_DISKMAGIC) {
270 put_dev_sector(sect);
271 return;
272 }
273
274 snprintf(tmp, sizeof(tmp), " %s%d: <%s:", state->name, origin, flavour);
275 strlcat(state->pp_buf, tmp, PAGE_SIZE);
276
277 if (le16_to_cpu(l->d_npartitions) < max_partitions)
278 max_partitions = le16_to_cpu(l->d_npartitions);
279 for (p = l->d_partitions; p - l->d_partitions < max_partitions; p++) {
280 sector_t bsd_start, bsd_size;
281
282 if (state->next == state->limit)
283 break;
284 if (p->p_fstype == BSD_FS_UNUSED)
285 continue;
286 bsd_start = le32_to_cpu(p->p_offset);
287 bsd_size = le32_to_cpu(p->p_size);
288 if (offset == bsd_start && size == bsd_size)
289 /* full parent partition, we have it already */
290 continue;
291 if (offset > bsd_start || offset+size < bsd_start+bsd_size) {
292 strlcat(state->pp_buf, "bad subpartition - ignored\n", PAGE_SIZE);
293 continue;
294 }
295 put_partition(state, state->next++, bsd_start, bsd_size);
296 }
297 put_dev_sector(sect);
298 if (le16_to_cpu(l->d_npartitions) > max_partitions) {
299 snprintf(tmp, sizeof(tmp), " (ignored %d more)",
300 le16_to_cpu(l->d_npartitions) - max_partitions);
301 strlcat(state->pp_buf, tmp, PAGE_SIZE);
302 }
303 strlcat(state->pp_buf, " >\n", PAGE_SIZE);
304}
305#endif
306
307static void parse_freebsd(struct parsed_partitions *state,
308 sector_t offset, sector_t size, int origin)
309{
310#ifdef CONFIG_BSD_DISKLABEL
311 parse_bsd(state, offset, size, origin, "bsd", BSD_MAXPARTITIONS);
312#endif
313}
314
315static void parse_netbsd(struct parsed_partitions *state,
316 sector_t offset, sector_t size, int origin)
317{
318#ifdef CONFIG_BSD_DISKLABEL
319 parse_bsd(state, offset, size, origin, "netbsd", BSD_MAXPARTITIONS);
320#endif
321}
322
323static void parse_openbsd(struct parsed_partitions *state,
324 sector_t offset, sector_t size, int origin)
325{
326#ifdef CONFIG_BSD_DISKLABEL
327 parse_bsd(state, offset, size, origin, "openbsd",
328 OPENBSD_MAXPARTITIONS);
329#endif
330}
331
332/*
333 * Create devices for Unixware partitions listed in a disklabel, under a
334 * dos-like partition. See parse_extended() for more information.
335 */
336static void parse_unixware(struct parsed_partitions *state,
337 sector_t offset, sector_t size, int origin)
338{
339#ifdef CONFIG_UNIXWARE_DISKLABEL
340 Sector sect;
341 struct unixware_disklabel *l;
342 struct unixware_slice *p;
343
344 l = read_part_sector(state, offset + 29, &sect);
345 if (!l)
346 return;
347 if (le32_to_cpu(l->d_magic) != UNIXWARE_DISKMAGIC ||
348 le32_to_cpu(l->vtoc.v_magic) != UNIXWARE_DISKMAGIC2) {
349 put_dev_sector(sect);
350 return;
351 }
352 {
353 char tmp[1 + BDEVNAME_SIZE + 10 + 12 + 1];
354
355 snprintf(tmp, sizeof(tmp), " %s%d: <unixware:", state->name, origin);
356 strlcat(state->pp_buf, tmp, PAGE_SIZE);
357 }
358 p = &l->vtoc.v_slice[1];
359 /* I omit the 0th slice as it is the same as whole disk. */
360 while (p - &l->vtoc.v_slice[0] < UNIXWARE_NUMSLICE) {
361 if (state->next == state->limit)
362 break;
363
364 if (p->s_label != UNIXWARE_FS_UNUSED)
365 put_partition(state, state->next++,
366 le32_to_cpu(p->start_sect),
367 le32_to_cpu(p->nr_sects));
368 p++;
369 }
370 put_dev_sector(sect);
371 strlcat(state->pp_buf, " >\n", PAGE_SIZE);
372#endif
373}
374
375/*
376 * Minix 2.0.0/2.0.2 subpartition support.
377 * Anand Krishnamurthy <anandk@wiproge.med.ge.com>
378 * Rajeev V. Pillai <rajeevvp@yahoo.com>
379 */
380static void parse_minix(struct parsed_partitions *state,
381 sector_t offset, sector_t size, int origin)
382{
383#ifdef CONFIG_MINIX_SUBPARTITION
384 Sector sect;
385 unsigned char *data;
386 struct partition *p;
387 int i;
388
389 data = read_part_sector(state, offset, &sect);
390 if (!data)
391 return;
392
393 p = (struct partition *)(data + 0x1be);
394
395 /* The first sector of a Minix partition can have either
396 * a secondary MBR describing its subpartitions, or
397 * the normal boot sector. */
398 if (msdos_magic_present (data + 510) &&
399 SYS_IND(p) == MINIX_PARTITION) { /* subpartition table present */
400 char tmp[1 + BDEVNAME_SIZE + 10 + 9 + 1];
401
402 snprintf(tmp, sizeof(tmp), " %s%d: <minix:", state->name, origin);
403 strlcat(state->pp_buf, tmp, PAGE_SIZE);
404 for (i = 0; i < MINIX_NR_SUBPARTITIONS; i++, p++) {
405 if (state->next == state->limit)
406 break;
407 /* add each partition in use */
408 if (SYS_IND(p) == MINIX_PARTITION)
409 put_partition(state, state->next++,
410 start_sect(p), nr_sects(p));
411 }
412 strlcat(state->pp_buf, " >\n", PAGE_SIZE);
413 }
414 put_dev_sector(sect);
415#endif /* CONFIG_MINIX_SUBPARTITION */
416}
417
418static struct {
419 unsigned char id;
420 void (*parse)(struct parsed_partitions *, sector_t, sector_t, int);
421} subtypes[] = {
422 {FREEBSD_PARTITION, parse_freebsd},
423 {NETBSD_PARTITION, parse_netbsd},
424 {OPENBSD_PARTITION, parse_openbsd},
425 {MINIX_PARTITION, parse_minix},
426 {UNIXWARE_PARTITION, parse_unixware},
427 {SOLARIS_X86_PARTITION, parse_solaris_x86},
428 {NEW_SOLARIS_X86_PARTITION, parse_solaris_x86},
429 {0, NULL},
430};
431
432int msdos_partition(struct parsed_partitions *state)
433{
434 sector_t sector_size = bdev_logical_block_size(state->bdev) / 512;
435 Sector sect;
436 unsigned char *data;
437 struct partition *p;
438 struct fat_boot_sector *fb;
439 int slot;
440
441 data = read_part_sector(state, 0, &sect);
442 if (!data)
443 return -1;
444 if (!msdos_magic_present(data + 510)) {
445 put_dev_sector(sect);
446 return 0;
447 }
448
449 if (aix_magic_present(state, data)) {
450 put_dev_sector(sect);
451 strlcat(state->pp_buf, " [AIX]", PAGE_SIZE);
452 return 0;
453 }
454
455 /*
456 * Now that the 55aa signature is present, this is probably
457 * either the boot sector of a FAT filesystem or a DOS-type
458 * partition table. Reject this in case the boot indicator
459 * is not 0 or 0x80.
460 */
461 p = (struct partition *) (data + 0x1be);
462 for (slot = 1; slot <= 4; slot++, p++) {
463 if (p->boot_ind != 0 && p->boot_ind != 0x80) {
464 /*
465 * Even without a valid boot inidicator value
466 * its still possible this is valid FAT filesystem
467 * without a partition table.
468 */
469 fb = (struct fat_boot_sector *) data;
470 if (slot == 1 && fb->reserved && fb->fats
471 && fat_valid_media(fb->media)) {
472 strlcat(state->pp_buf, "\n", PAGE_SIZE);
473 put_dev_sector(sect);
474 return 1;
475 } else {
476 put_dev_sector(sect);
477 return 0;
478 }
479 }
480 }
481
482#ifdef CONFIG_EFI_PARTITION
483 p = (struct partition *) (data + 0x1be);
484 for (slot = 1 ; slot <= 4 ; slot++, p++) {
485 /* If this is an EFI GPT disk, msdos should ignore it. */
486 if (SYS_IND(p) == EFI_PMBR_OSTYPE_EFI_GPT) {
487 put_dev_sector(sect);
488 return 0;
489 }
490 }
491#endif
492 p = (struct partition *) (data + 0x1be);
493
494 /*
495 * Look for partitions in two passes:
496 * First find the primary and DOS-type extended partitions.
497 * On the second pass look inside *BSD, Unixware and Solaris partitions.
498 */
499
500 state->next = 5;
501 for (slot = 1 ; slot <= 4 ; slot++, p++) {
502 sector_t start = start_sect(p)*sector_size;
503 sector_t size = nr_sects(p)*sector_size;
504 if (!size)
505 continue;
506 if (is_extended_partition(p)) {
507 /*
508 * prevent someone doing mkfs or mkswap on an
509 * extended partition, but leave room for LILO
510 * FIXME: this uses one logical sector for > 512b
511 * sector, although it may not be enough/proper.
512 */
513 sector_t n = 2;
514 n = min(size, max(sector_size, n));
515 put_partition(state, slot, start, n);
516
517 strlcat(state->pp_buf, " <", PAGE_SIZE);
518 parse_extended(state, start, size);
519 strlcat(state->pp_buf, " >", PAGE_SIZE);
520 continue;
521 }
522 put_partition(state, slot, start, size);
523 if (SYS_IND(p) == LINUX_RAID_PARTITION)
524 state->parts[slot].flags = ADDPART_FLAG_RAID;
525 if (SYS_IND(p) == DM6_PARTITION)
526 strlcat(state->pp_buf, "[DM]", PAGE_SIZE);
527 if (SYS_IND(p) == EZD_PARTITION)
528 strlcat(state->pp_buf, "[EZD]", PAGE_SIZE);
529 }
530
531 strlcat(state->pp_buf, "\n", PAGE_SIZE);
532
533 /* second pass - output for each on a separate line */
534 p = (struct partition *) (0x1be + data);
535 for (slot = 1 ; slot <= 4 ; slot++, p++) {
536 unsigned char id = SYS_IND(p);
537 int n;
538
539 if (!nr_sects(p))
540 continue;
541
542 for (n = 0; subtypes[n].parse && id != subtypes[n].id; n++)
543 ;
544
545 if (!subtypes[n].parse)
546 continue;
547 subtypes[n].parse(state, start_sect(p) * sector_size,
548 nr_sects(p) * sector_size, slot);
549 }
550 put_dev_sector(sect);
551 return 1;
552}
diff --git a/block/partitions/msdos.h b/block/partitions/msdos.h
new file mode 100644
index 000000000000..38c781c490b3
--- /dev/null
+++ b/block/partitions/msdos.h
@@ -0,0 +1,8 @@
1/*
2 * fs/partitions/msdos.h
3 */
4
5#define MSDOS_LABEL_MAGIC 0xAA55
6
7int msdos_partition(struct parsed_partitions *state);
8
diff --git a/block/partitions/osf.c b/block/partitions/osf.c
new file mode 100644
index 000000000000..764b86a01965
--- /dev/null
+++ b/block/partitions/osf.c
@@ -0,0 +1,86 @@
1/*
2 * fs/partitions/osf.c
3 *
4 * Code extracted from drivers/block/genhd.c
5 *
6 * Copyright (C) 1991-1998 Linus Torvalds
7 * Re-organised Feb 1998 Russell King
8 */
9
10#include "check.h"
11#include "osf.h"
12
13#define MAX_OSF_PARTITIONS 18
14
15int osf_partition(struct parsed_partitions *state)
16{
17 int i;
18 int slot = 1;
19 unsigned int npartitions;
20 Sector sect;
21 unsigned char *data;
22 struct disklabel {
23 __le32 d_magic;
24 __le16 d_type,d_subtype;
25 u8 d_typename[16];
26 u8 d_packname[16];
27 __le32 d_secsize;
28 __le32 d_nsectors;
29 __le32 d_ntracks;
30 __le32 d_ncylinders;
31 __le32 d_secpercyl;
32 __le32 d_secprtunit;
33 __le16 d_sparespertrack;
34 __le16 d_sparespercyl;
35 __le32 d_acylinders;
36 __le16 d_rpm, d_interleave, d_trackskew, d_cylskew;
37 __le32 d_headswitch, d_trkseek, d_flags;
38 __le32 d_drivedata[5];
39 __le32 d_spare[5];
40 __le32 d_magic2;
41 __le16 d_checksum;
42 __le16 d_npartitions;
43 __le32 d_bbsize, d_sbsize;
44 struct d_partition {
45 __le32 p_size;
46 __le32 p_offset;
47 __le32 p_fsize;
48 u8 p_fstype;
49 u8 p_frag;
50 __le16 p_cpg;
51 } d_partitions[MAX_OSF_PARTITIONS];
52 } * label;
53 struct d_partition * partition;
54
55 data = read_part_sector(state, 0, &sect);
56 if (!data)
57 return -1;
58
59 label = (struct disklabel *) (data+64);
60 partition = label->d_partitions;
61 if (le32_to_cpu(label->d_magic) != DISKLABELMAGIC) {
62 put_dev_sector(sect);
63 return 0;
64 }
65 if (le32_to_cpu(label->d_magic2) != DISKLABELMAGIC) {
66 put_dev_sector(sect);
67 return 0;
68 }
69 npartitions = le16_to_cpu(label->d_npartitions);
70 if (npartitions > MAX_OSF_PARTITIONS) {
71 put_dev_sector(sect);
72 return 0;
73 }
74 for (i = 0 ; i < npartitions; i++, partition++) {
75 if (slot == state->limit)
76 break;
77 if (le32_to_cpu(partition->p_size))
78 put_partition(state, slot,
79 le32_to_cpu(partition->p_offset),
80 le32_to_cpu(partition->p_size));
81 slot++;
82 }
83 strlcat(state->pp_buf, "\n", PAGE_SIZE);
84 put_dev_sector(sect);
85 return 1;
86}
diff --git a/block/partitions/osf.h b/block/partitions/osf.h
new file mode 100644
index 000000000000..20ed2315ec16
--- /dev/null
+++ b/block/partitions/osf.h
@@ -0,0 +1,7 @@
1/*
2 * fs/partitions/osf.h
3 */
4
5#define DISKLABELMAGIC (0x82564557UL)
6
7int osf_partition(struct parsed_partitions *state);
diff --git a/block/partitions/sgi.c b/block/partitions/sgi.c
new file mode 100644
index 000000000000..ea8a86dceaf4
--- /dev/null
+++ b/block/partitions/sgi.c
@@ -0,0 +1,82 @@
1/*
2 * fs/partitions/sgi.c
3 *
4 * Code extracted from drivers/block/genhd.c
5 */
6
7#include "check.h"
8#include "sgi.h"
9
10struct sgi_disklabel {
11 __be32 magic_mushroom; /* Big fat spliff... */
12 __be16 root_part_num; /* Root partition number */
13 __be16 swap_part_num; /* Swap partition number */
14 s8 boot_file[16]; /* Name of boot file for ARCS */
15 u8 _unused0[48]; /* Device parameter useless crapola.. */
16 struct sgi_volume {
17 s8 name[8]; /* Name of volume */
18 __be32 block_num; /* Logical block number */
19 __be32 num_bytes; /* How big, in bytes */
20 } volume[15];
21 struct sgi_partition {
22 __be32 num_blocks; /* Size in logical blocks */
23 __be32 first_block; /* First logical block */
24 __be32 type; /* Type of this partition */
25 } partitions[16];
26 __be32 csum; /* Disk label checksum */
27 __be32 _unused1; /* Padding */
28};
29
30int sgi_partition(struct parsed_partitions *state)
31{
32 int i, csum;
33 __be32 magic;
34 int slot = 1;
35 unsigned int start, blocks;
36 __be32 *ui, cs;
37 Sector sect;
38 struct sgi_disklabel *label;
39 struct sgi_partition *p;
40 char b[BDEVNAME_SIZE];
41
42 label = read_part_sector(state, 0, &sect);
43 if (!label)
44 return -1;
45 p = &label->partitions[0];
46 magic = label->magic_mushroom;
47 if(be32_to_cpu(magic) != SGI_LABEL_MAGIC) {
48 /*printk("Dev %s SGI disklabel: bad magic %08x\n",
49 bdevname(bdev, b), be32_to_cpu(magic));*/
50 put_dev_sector(sect);
51 return 0;
52 }
53 ui = ((__be32 *) (label + 1)) - 1;
54 for(csum = 0; ui >= ((__be32 *) label);) {
55 cs = *ui--;
56 csum += be32_to_cpu(cs);
57 }
58 if(csum) {
59 printk(KERN_WARNING "Dev %s SGI disklabel: csum bad, label corrupted\n",
60 bdevname(state->bdev, b));
61 put_dev_sector(sect);
62 return 0;
63 }
64 /* All SGI disk labels have 16 partitions, disks under Linux only
65 * have 15 minor's. Luckily there are always a few zero length
66 * partitions which we don't care about so we never overflow the
67 * current_minor.
68 */
69 for(i = 0; i < 16; i++, p++) {
70 blocks = be32_to_cpu(p->num_blocks);
71 start = be32_to_cpu(p->first_block);
72 if (blocks) {
73 put_partition(state, slot, start, blocks);
74 if (be32_to_cpu(p->type) == LINUX_RAID_PARTITION)
75 state->parts[slot].flags = ADDPART_FLAG_RAID;
76 }
77 slot++;
78 }
79 strlcat(state->pp_buf, "\n", PAGE_SIZE);
80 put_dev_sector(sect);
81 return 1;
82}
diff --git a/block/partitions/sgi.h b/block/partitions/sgi.h
new file mode 100644
index 000000000000..b9553ebdd5a9
--- /dev/null
+++ b/block/partitions/sgi.h
@@ -0,0 +1,8 @@
1/*
2 * fs/partitions/sgi.h
3 */
4
5extern int sgi_partition(struct parsed_partitions *state);
6
7#define SGI_LABEL_MAGIC 0x0be5a941
8
diff --git a/block/partitions/sun.c b/block/partitions/sun.c
new file mode 100644
index 000000000000..b5b6fcfb3d36
--- /dev/null
+++ b/block/partitions/sun.c
@@ -0,0 +1,122 @@
1/*
2 * fs/partitions/sun.c
3 *
4 * Code extracted from drivers/block/genhd.c
5 *
6 * Copyright (C) 1991-1998 Linus Torvalds
7 * Re-organised Feb 1998 Russell King
8 */
9
10#include "check.h"
11#include "sun.h"
12
13int sun_partition(struct parsed_partitions *state)
14{
15 int i;
16 __be16 csum;
17 int slot = 1;
18 __be16 *ush;
19 Sector sect;
20 struct sun_disklabel {
21 unsigned char info[128]; /* Informative text string */
22 struct sun_vtoc {
23 __be32 version; /* Layout version */
24 char volume[8]; /* Volume name */
25 __be16 nparts; /* Number of partitions */
26 struct sun_info { /* Partition hdrs, sec 2 */
27 __be16 id;
28 __be16 flags;
29 } infos[8];
30 __be16 padding; /* Alignment padding */
31 __be32 bootinfo[3]; /* Info needed by mboot */
32 __be32 sanity; /* To verify vtoc sanity */
33 __be32 reserved[10]; /* Free space */
34 __be32 timestamp[8]; /* Partition timestamp */
35 } vtoc;
36 __be32 write_reinstruct; /* sectors to skip, writes */
37 __be32 read_reinstruct; /* sectors to skip, reads */
38 unsigned char spare[148]; /* Padding */
39 __be16 rspeed; /* Disk rotational speed */
40 __be16 pcylcount; /* Physical cylinder count */
41 __be16 sparecyl; /* extra sects per cylinder */
42 __be16 obs1; /* gap1 */
43 __be16 obs2; /* gap2 */
44 __be16 ilfact; /* Interleave factor */
45 __be16 ncyl; /* Data cylinder count */
46 __be16 nacyl; /* Alt. cylinder count */
47 __be16 ntrks; /* Tracks per cylinder */
48 __be16 nsect; /* Sectors per track */
49 __be16 obs3; /* bhead - Label head offset */
50 __be16 obs4; /* ppart - Physical Partition */
51 struct sun_partition {
52 __be32 start_cylinder;
53 __be32 num_sectors;
54 } partitions[8];
55 __be16 magic; /* Magic number */
56 __be16 csum; /* Label xor'd checksum */
57 } * label;
58 struct sun_partition *p;
59 unsigned long spc;
60 char b[BDEVNAME_SIZE];
61 int use_vtoc;
62 int nparts;
63
64 label = read_part_sector(state, 0, &sect);
65 if (!label)
66 return -1;
67
68 p = label->partitions;
69 if (be16_to_cpu(label->magic) != SUN_LABEL_MAGIC) {
70/* printk(KERN_INFO "Dev %s Sun disklabel: bad magic %04x\n",
71 bdevname(bdev, b), be16_to_cpu(label->magic)); */
72 put_dev_sector(sect);
73 return 0;
74 }
75 /* Look at the checksum */
76 ush = ((__be16 *) (label+1)) - 1;
77 for (csum = 0; ush >= ((__be16 *) label);)
78 csum ^= *ush--;
79 if (csum) {
80 printk("Dev %s Sun disklabel: Csum bad, label corrupted\n",
81 bdevname(state->bdev, b));
82 put_dev_sector(sect);
83 return 0;
84 }
85
86 /* Check to see if we can use the VTOC table */
87 use_vtoc = ((be32_to_cpu(label->vtoc.sanity) == SUN_VTOC_SANITY) &&
88 (be32_to_cpu(label->vtoc.version) == 1) &&
89 (be16_to_cpu(label->vtoc.nparts) <= 8));
90
91 /* Use 8 partition entries if not specified in validated VTOC */
92 nparts = (use_vtoc) ? be16_to_cpu(label->vtoc.nparts) : 8;
93
94 /*
95 * So that old Linux-Sun partitions continue to work,
96 * alow the VTOC to be used under the additional condition ...
97 */
98 use_vtoc = use_vtoc || !(label->vtoc.sanity ||
99 label->vtoc.version || label->vtoc.nparts);
100 spc = be16_to_cpu(label->ntrks) * be16_to_cpu(label->nsect);
101 for (i = 0; i < nparts; i++, p++) {
102 unsigned long st_sector;
103 unsigned int num_sectors;
104
105 st_sector = be32_to_cpu(p->start_cylinder) * spc;
106 num_sectors = be32_to_cpu(p->num_sectors);
107 if (num_sectors) {
108 put_partition(state, slot, st_sector, num_sectors);
109 state->parts[slot].flags = 0;
110 if (use_vtoc) {
111 if (be16_to_cpu(label->vtoc.infos[i].id) == LINUX_RAID_PARTITION)
112 state->parts[slot].flags |= ADDPART_FLAG_RAID;
113 else if (be16_to_cpu(label->vtoc.infos[i].id) == SUN_WHOLE_DISK)
114 state->parts[slot].flags |= ADDPART_FLAG_WHOLEDISK;
115 }
116 }
117 slot++;
118 }
119 strlcat(state->pp_buf, "\n", PAGE_SIZE);
120 put_dev_sector(sect);
121 return 1;
122}
diff --git a/block/partitions/sun.h b/block/partitions/sun.h
new file mode 100644
index 000000000000..2424baa8319f
--- /dev/null
+++ b/block/partitions/sun.h
@@ -0,0 +1,8 @@
1/*
2 * fs/partitions/sun.h
3 */
4
5#define SUN_LABEL_MAGIC 0xDABE
6#define SUN_VTOC_SANITY 0x600DDEEE
7
8int sun_partition(struct parsed_partitions *state);
diff --git a/block/partitions/sysv68.c b/block/partitions/sysv68.c
new file mode 100644
index 000000000000..9627ccffc1c4
--- /dev/null
+++ b/block/partitions/sysv68.c
@@ -0,0 +1,95 @@
1/*
2 * fs/partitions/sysv68.c
3 *
4 * Copyright (C) 2007 Philippe De Muyter <phdm@macqel.be>
5 */
6
7#include "check.h"
8#include "sysv68.h"
9
10/*
11 * Volume ID structure: on first 256-bytes sector of disk
12 */
13
14struct volumeid {
15 u8 vid_unused[248];
16 u8 vid_mac[8]; /* ASCII string "MOTOROLA" */
17};
18
19/*
20 * config block: second 256-bytes sector on disk
21 */
22
23struct dkconfig {
24 u8 ios_unused0[128];
25 __be32 ios_slcblk; /* Slice table block number */
26 __be16 ios_slccnt; /* Number of entries in slice table */
27 u8 ios_unused1[122];
28};
29
30/*
31 * combined volumeid and dkconfig block
32 */
33
34struct dkblk0 {
35 struct volumeid dk_vid;
36 struct dkconfig dk_ios;
37};
38
39/*
40 * Slice Table Structure
41 */
42
43struct slice {
44 __be32 nblocks; /* slice size (in blocks) */
45 __be32 blkoff; /* block offset of slice */
46};
47
48
49int sysv68_partition(struct parsed_partitions *state)
50{
51 int i, slices;
52 int slot = 1;
53 Sector sect;
54 unsigned char *data;
55 struct dkblk0 *b;
56 struct slice *slice;
57 char tmp[64];
58
59 data = read_part_sector(state, 0, &sect);
60 if (!data)
61 return -1;
62
63 b = (struct dkblk0 *)data;
64 if (memcmp(b->dk_vid.vid_mac, "MOTOROLA", sizeof(b->dk_vid.vid_mac))) {
65 put_dev_sector(sect);
66 return 0;
67 }
68 slices = be16_to_cpu(b->dk_ios.ios_slccnt);
69 i = be32_to_cpu(b->dk_ios.ios_slcblk);
70 put_dev_sector(sect);
71
72 data = read_part_sector(state, i, &sect);
73 if (!data)
74 return -1;
75
76 slices -= 1; /* last slice is the whole disk */
77 snprintf(tmp, sizeof(tmp), "sysV68: %s(s%u)", state->name, slices);
78 strlcat(state->pp_buf, tmp, PAGE_SIZE);
79 slice = (struct slice *)data;
80 for (i = 0; i < slices; i++, slice++) {
81 if (slot == state->limit)
82 break;
83 if (be32_to_cpu(slice->nblocks)) {
84 put_partition(state, slot,
85 be32_to_cpu(slice->blkoff),
86 be32_to_cpu(slice->nblocks));
87 snprintf(tmp, sizeof(tmp), "(s%u)", i);
88 strlcat(state->pp_buf, tmp, PAGE_SIZE);
89 }
90 slot++;
91 }
92 strlcat(state->pp_buf, "\n", PAGE_SIZE);
93 put_dev_sector(sect);
94 return 1;
95}
diff --git a/block/partitions/sysv68.h b/block/partitions/sysv68.h
new file mode 100644
index 000000000000..bf2f5ffa97ac
--- /dev/null
+++ b/block/partitions/sysv68.h
@@ -0,0 +1 @@
extern int sysv68_partition(struct parsed_partitions *state);
diff --git a/block/partitions/ultrix.c b/block/partitions/ultrix.c
new file mode 100644
index 000000000000..8dbaf9f77a99
--- /dev/null
+++ b/block/partitions/ultrix.c
@@ -0,0 +1,48 @@
1/*
2 * fs/partitions/ultrix.c
3 *
4 * Code extracted from drivers/block/genhd.c
5 *
6 * Re-organised Jul 1999 Russell King
7 */
8
9#include "check.h"
10#include "ultrix.h"
11
12int ultrix_partition(struct parsed_partitions *state)
13{
14 int i;
15 Sector sect;
16 unsigned char *data;
17 struct ultrix_disklabel {
18 s32 pt_magic; /* magic no. indicating part. info exits */
19 s32 pt_valid; /* set by driver if pt is current */
20 struct pt_info {
21 s32 pi_nblocks; /* no. of sectors */
22 u32 pi_blkoff; /* block offset for start */
23 } pt_part[8];
24 } *label;
25
26#define PT_MAGIC 0x032957 /* Partition magic number */
27#define PT_VALID 1 /* Indicates if struct is valid */
28
29 data = read_part_sector(state, (16384 - sizeof(*label))/512, &sect);
30 if (!data)
31 return -1;
32
33 label = (struct ultrix_disklabel *)(data + 512 - sizeof(*label));
34
35 if (label->pt_magic == PT_MAGIC && label->pt_valid == PT_VALID) {
36 for (i=0; i<8; i++)
37 if (label->pt_part[i].pi_nblocks)
38 put_partition(state, i+1,
39 label->pt_part[i].pi_blkoff,
40 label->pt_part[i].pi_nblocks);
41 put_dev_sector(sect);
42 strlcat(state->pp_buf, "\n", PAGE_SIZE);
43 return 1;
44 } else {
45 put_dev_sector(sect);
46 return 0;
47 }
48}
diff --git a/block/partitions/ultrix.h b/block/partitions/ultrix.h
new file mode 100644
index 000000000000..a3cc00b2bded
--- /dev/null
+++ b/block/partitions/ultrix.h
@@ -0,0 +1,5 @@
1/*
2 * fs/partitions/ultrix.h
3 */
4
5int ultrix_partition(struct parsed_partitions *state);
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-24 23:57:13 -0500