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1da177e4 LT |
1 | #ifndef _LINUX_GENHD_H |
2 | #define _LINUX_GENHD_H | |
3 | ||
4 | /* | |
5 | * genhd.h Copyright (C) 1992 Drew Eckhardt | |
6 | * Generic hard disk header file by | |
7 | * Drew Eckhardt | |
8 | * | |
9 | * <drew@colorado.edu> | |
10 | */ | |
11 | ||
1da177e4 | 12 | #include <linux/types.h> |
edfaa7c3 | 13 | #include <linux/kdev_t.h> |
e71bf0d0 | 14 | #include <linux/rcupdate.h> |
1da177e4 | 15 | |
9361401e DH |
16 | #ifdef CONFIG_BLOCK |
17 | ||
ed9e1982 TH |
18 | #define kobj_to_dev(k) container_of((k), struct device, kobj) |
19 | #define dev_to_disk(device) container_of((device), struct gendisk, __dev) | |
20 | #define dev_to_part(device) container_of((device), struct hd_struct, __dev) | |
21 | #define disk_to_dev(disk) (&((disk)->__dev)) | |
22 | #define part_to_dev(part) (&((part)->__dev)) | |
edfaa7c3 | 23 | |
edfaa7c3 KS |
24 | extern struct device_type part_type; |
25 | extern struct kobject *block_depr; | |
26 | extern struct class block_class; | |
27 | ||
a0db701a AB |
28 | extern const struct seq_operations partitions_op; |
29 | extern const struct seq_operations diskstats_op; | |
30 | ||
1da177e4 LT |
31 | enum { |
32 | /* These three have identical behaviour; use the second one if DOS FDISK gets | |
33 | confused about extended/logical partitions starting past cylinder 1023. */ | |
34 | DOS_EXTENDED_PARTITION = 5, | |
35 | LINUX_EXTENDED_PARTITION = 0x85, | |
36 | WIN98_EXTENDED_PARTITION = 0x0f, | |
37 | ||
d18d7682 FMDN |
38 | SUN_WHOLE_DISK = DOS_EXTENDED_PARTITION, |
39 | ||
1da177e4 | 40 | LINUX_SWAP_PARTITION = 0x82, |
4419d1ac OH |
41 | LINUX_DATA_PARTITION = 0x83, |
42 | LINUX_LVM_PARTITION = 0x8e, | |
1da177e4 LT |
43 | LINUX_RAID_PARTITION = 0xfd, /* autodetect RAID partition */ |
44 | ||
45 | SOLARIS_X86_PARTITION = LINUX_SWAP_PARTITION, | |
46 | NEW_SOLARIS_X86_PARTITION = 0xbf, | |
47 | ||
48 | DM6_AUX1PARTITION = 0x51, /* no DDO: use xlated geom */ | |
49 | DM6_AUX3PARTITION = 0x53, /* no DDO: use xlated geom */ | |
50 | DM6_PARTITION = 0x54, /* has DDO: use xlated geom & offset */ | |
51 | EZD_PARTITION = 0x55, /* EZ-DRIVE */ | |
52 | ||
53 | FREEBSD_PARTITION = 0xa5, /* FreeBSD Partition ID */ | |
54 | OPENBSD_PARTITION = 0xa6, /* OpenBSD Partition ID */ | |
55 | NETBSD_PARTITION = 0xa9, /* NetBSD Partition ID */ | |
56 | BSDI_PARTITION = 0xb7, /* BSDI Partition ID */ | |
57 | MINIX_PARTITION = 0x81, /* Minix Partition ID */ | |
58 | UNIXWARE_PARTITION = 0x63, /* Same as GNU_HURD and SCO Unix */ | |
59 | }; | |
60 | ||
34186efc DW |
61 | #include <linux/major.h> |
62 | #include <linux/device.h> | |
63 | #include <linux/smp.h> | |
64 | #include <linux/string.h> | |
65 | #include <linux/fs.h> | |
8ce7ad7b | 66 | #include <linux/workqueue.h> |
34186efc | 67 | |
1da177e4 LT |
68 | struct partition { |
69 | unsigned char boot_ind; /* 0x80 - active */ | |
70 | unsigned char head; /* starting head */ | |
71 | unsigned char sector; /* starting sector */ | |
72 | unsigned char cyl; /* starting cylinder */ | |
73 | unsigned char sys_ind; /* What partition type */ | |
74 | unsigned char end_head; /* end head */ | |
75 | unsigned char end_sector; /* end sector */ | |
76 | unsigned char end_cyl; /* end cylinder */ | |
77 | __le32 start_sect; /* starting sector counting from 0 */ | |
78 | __le32 nr_sects; /* nr of sectors in partition */ | |
79 | } __attribute__((packed)); | |
80 | ||
ea5c48ab JM |
81 | struct disk_stats { |
82 | unsigned long sectors[2]; /* READs and WRITEs */ | |
83 | unsigned long ios[2]; | |
84 | unsigned long merges[2]; | |
85 | unsigned long ticks[2]; | |
86 | unsigned long io_ticks; | |
87 | unsigned long time_in_queue; | |
88 | }; | |
89 | ||
1da177e4 LT |
90 | struct hd_struct { |
91 | sector_t start_sect; | |
92 | sector_t nr_sects; | |
ed9e1982 | 93 | struct device __dev; |
6a4d44c1 | 94 | struct kobject *holder_dir; |
1da177e4 | 95 | int policy, partno; |
c17bb495 AM |
96 | #ifdef CONFIG_FAIL_MAKE_REQUEST |
97 | int make_it_fail; | |
ea5c48ab JM |
98 | #endif |
99 | unsigned long stamp; | |
100 | int in_flight; | |
101 | #ifdef CONFIG_SMP | |
102 | struct disk_stats *dkstats; | |
103 | #else | |
104 | struct disk_stats dkstats; | |
c17bb495 | 105 | #endif |
e71bf0d0 | 106 | struct rcu_head rcu_head; |
1da177e4 LT |
107 | }; |
108 | ||
109 | #define GENHD_FL_REMOVABLE 1 | |
110 | #define GENHD_FL_DRIVERFS 2 | |
86ce18d7 | 111 | #define GENHD_FL_MEDIA_CHANGE_NOTIFY 4 |
1da177e4 LT |
112 | #define GENHD_FL_CD 8 |
113 | #define GENHD_FL_UP 16 | |
114 | #define GENHD_FL_SUPPRESS_PARTITION_INFO 32 | |
c17bb495 | 115 | #define GENHD_FL_FAIL 64 |
1da177e4 | 116 | |
1da177e4 | 117 | struct gendisk { |
bcce3de1 TH |
118 | /* major, first_minor, minors and ext_minors are input |
119 | * parameters only, don't use directly. Use disk_devt() and | |
120 | * disk_max_parts(). | |
f331c029 | 121 | */ |
1da177e4 LT |
122 | int major; /* major number of driver */ |
123 | int first_minor; | |
124 | int minors; /* maximum number of minors, =1 for | |
125 | * disks that can't be partitioned. */ | |
bcce3de1 | 126 | int ext_minors; /* number of extended dynamic minors */ |
f331c029 | 127 | |
1da177e4 | 128 | char disk_name[32]; /* name of major driver */ |
e71bf0d0 | 129 | |
b5d0b9df | 130 | /* Array of pointers to partitions indexed by partno. |
e71bf0d0 TH |
131 | * Protected with matching bdev lock but stat and other |
132 | * non-critical accesses use RCU. Always access through | |
133 | * helpers. | |
134 | */ | |
135 | struct hd_struct **__part; | |
b5d0b9df | 136 | struct hd_struct part0; |
e71bf0d0 | 137 | |
1da177e4 LT |
138 | struct block_device_operations *fops; |
139 | struct request_queue *queue; | |
140 | void *private_data; | |
1da177e4 LT |
141 | |
142 | int flags; | |
edfaa7c3 | 143 | struct device *driverfs_dev; // FIXME: remove |
ed9e1982 | 144 | struct device __dev; |
6a4d44c1 JN |
145 | struct kobject *holder_dir; |
146 | struct kobject *slave_dir; | |
1da177e4 LT |
147 | |
148 | struct timer_rand_state *random; | |
149 | int policy; | |
150 | ||
151 | atomic_t sync_io; /* RAID */ | |
20e5c81f | 152 | unsigned long stamp; |
1da177e4 LT |
153 | int in_flight; |
154 | #ifdef CONFIG_SMP | |
155 | struct disk_stats *dkstats; | |
156 | #else | |
157 | struct disk_stats dkstats; | |
158 | #endif | |
8ce7ad7b | 159 | struct work_struct async_notify; |
7ba1ba12 MP |
160 | #ifdef CONFIG_BLK_DEV_INTEGRITY |
161 | struct blk_integrity *integrity; | |
162 | #endif | |
1da177e4 LT |
163 | }; |
164 | ||
310a2c10 TH |
165 | static inline struct gendisk *part_to_disk(struct hd_struct *part) |
166 | { | |
167 | if (likely(part)) | |
ed9e1982 | 168 | return dev_to_disk(part_to_dev(part)->parent); |
310a2c10 TH |
169 | return NULL; |
170 | } | |
171 | ||
f331c029 TH |
172 | static inline int disk_max_parts(struct gendisk *disk) |
173 | { | |
b5d0b9df TH |
174 | return disk->minors + disk->ext_minors; |
175 | } | |
176 | ||
177 | static inline bool disk_partitionable(struct gendisk *disk) | |
178 | { | |
179 | return disk_max_parts(disk) > 1; | |
f331c029 TH |
180 | } |
181 | ||
182 | static inline dev_t disk_devt(struct gendisk *disk) | |
183 | { | |
ed9e1982 | 184 | return disk_to_dev(disk)->devt; |
f331c029 TH |
185 | } |
186 | ||
187 | static inline dev_t part_devt(struct hd_struct *part) | |
188 | { | |
ed9e1982 | 189 | return part_to_dev(part)->devt; |
f331c029 TH |
190 | } |
191 | ||
e71bf0d0 TH |
192 | extern struct hd_struct *disk_get_part(struct gendisk *disk, int partno); |
193 | ||
194 | static inline void disk_put_part(struct hd_struct *part) | |
195 | { | |
196 | if (likely(part)) | |
ed9e1982 | 197 | put_device(part_to_dev(part)); |
e71bf0d0 TH |
198 | } |
199 | ||
200 | /* | |
201 | * Smarter partition iterator without context limits. | |
202 | */ | |
203 | #define DISK_PITER_REVERSE (1 << 0) /* iterate in the reverse direction */ | |
204 | #define DISK_PITER_INCL_EMPTY (1 << 1) /* include 0-sized parts */ | |
b5d0b9df | 205 | #define DISK_PITER_INCL_PART0 (1 << 2) /* include partition 0 */ |
e71bf0d0 TH |
206 | |
207 | struct disk_part_iter { | |
208 | struct gendisk *disk; | |
209 | struct hd_struct *part; | |
210 | int idx; | |
211 | unsigned int flags; | |
212 | }; | |
213 | ||
214 | extern void disk_part_iter_init(struct disk_part_iter *piter, | |
215 | struct gendisk *disk, unsigned int flags); | |
216 | extern struct hd_struct *disk_part_iter_next(struct disk_part_iter *piter); | |
217 | extern void disk_part_iter_exit(struct disk_part_iter *piter); | |
218 | ||
219 | extern struct hd_struct *disk_map_sector_rcu(struct gendisk *disk, | |
220 | sector_t sector); | |
221 | ||
c9959059 | 222 | /* |
1da177e4 LT |
223 | * Macros to operate on percpu disk statistics: |
224 | * | |
c9959059 TH |
225 | * {disk|part|all}_stat_{add|sub|inc|dec}() modify the stat counters |
226 | * and should be called between disk_stat_lock() and | |
227 | * disk_stat_unlock(). | |
228 | * | |
229 | * part_stat_read() can be called at any time. | |
230 | * | |
231 | * part_stat_{add|set_all}() and {init|free}_part_stats are for | |
232 | * internal use only. | |
1da177e4 LT |
233 | */ |
234 | #ifdef CONFIG_SMP | |
c9959059 TH |
235 | #define disk_stat_lock() ({ rcu_read_lock(); get_cpu(); }) |
236 | #define disk_stat_unlock() do { put_cpu(); rcu_read_unlock(); } while (0) | |
237 | ||
238 | #define disk_stat_add(cpu, gendiskp, field, addnd) \ | |
239 | (per_cpu_ptr(gendiskp->dkstats, cpu)->field += addnd) | |
1da177e4 LT |
240 | |
241 | #define disk_stat_read(gendiskp, field) \ | |
242 | ({ \ | |
243 | typeof(gendiskp->dkstats->field) res = 0; \ | |
244 | int i; \ | |
0a945022 | 245 | for_each_possible_cpu(i) \ |
1da177e4 | 246 | res += per_cpu_ptr(gendiskp->dkstats, i)->field; \ |
1da177e4 LT |
247 | res; \ |
248 | }) | |
249 | ||
c9959059 TH |
250 | static inline void disk_stat_set_all(struct gendisk *gendiskp, int value) |
251 | { | |
1da177e4 | 252 | int i; |
28f13702 | 253 | |
0a945022 | 254 | for_each_possible_cpu(i) |
394e3902 | 255 | memset(per_cpu_ptr(gendiskp->dkstats, i), value, |
28f13702 | 256 | sizeof(struct disk_stats)); |
1da177e4 | 257 | } |
ea5c48ab | 258 | |
c9959059 TH |
259 | #define part_stat_add(cpu, part, field, addnd) \ |
260 | (per_cpu_ptr(part->dkstats, cpu)->field += addnd) | |
ea5c48ab | 261 | |
c9959059 TH |
262 | #define all_stat_add(cpu, gendiskp, part, field, addnd, sector) \ |
263 | ({ \ | |
264 | if (part) \ | |
265 | part_stat_add(cpu, part, field, addnd); \ | |
266 | disk_stat_add(cpu, gendiskp, field, addnd); \ | |
ea5c48ab JM |
267 | }) |
268 | ||
269 | #define part_stat_read(part, field) \ | |
270 | ({ \ | |
271 | typeof(part->dkstats->field) res = 0; \ | |
272 | int i; \ | |
273 | for_each_possible_cpu(i) \ | |
274 | res += per_cpu_ptr(part->dkstats, i)->field; \ | |
275 | res; \ | |
276 | }) | |
277 | ||
28f13702 JA |
278 | static inline void part_stat_set_all(struct hd_struct *part, int value) |
279 | { | |
ea5c48ab | 280 | int i; |
28f13702 | 281 | |
ea5c48ab JM |
282 | for_each_possible_cpu(i) |
283 | memset(per_cpu_ptr(part->dkstats, i), value, | |
28f13702 | 284 | sizeof(struct disk_stats)); |
ea5c48ab | 285 | } |
c9959059 | 286 | |
a8ae50ba | 287 | #else /* !CONFIG_SMP */ |
c9959059 TH |
288 | #define disk_stat_lock() ({ rcu_read_lock(); 0; }) |
289 | #define disk_stat_unlock() rcu_read_unlock() | |
290 | ||
291 | #define disk_stat_add(cpu, gendiskp, field, addnd) \ | |
292 | (gendiskp->dkstats.field += addnd) | |
1da177e4 LT |
293 | #define disk_stat_read(gendiskp, field) (gendiskp->dkstats.field) |
294 | ||
ea5c48ab JM |
295 | static inline void disk_stat_set_all(struct gendisk *gendiskp, int value) |
296 | { | |
1da177e4 LT |
297 | memset(&gendiskp->dkstats, value, sizeof (struct disk_stats)); |
298 | } | |
ea5c48ab | 299 | |
c9959059 | 300 | #define part_stat_add(cpu, part, field, addnd) \ |
ea5c48ab JM |
301 | (part->dkstats.field += addnd) |
302 | ||
c9959059 TH |
303 | #define all_stat_add(cpu, gendiskp, part, field, addnd, sector) \ |
304 | ({ \ | |
305 | if (part) \ | |
306 | part_stat_add(cpu, part, field, addnd); \ | |
307 | disk_stat_add(cpu, gendiskp, field, addnd); \ | |
ea5c48ab JM |
308 | }) |
309 | ||
310 | #define part_stat_read(part, field) (part->dkstats.field) | |
311 | ||
312 | static inline void part_stat_set_all(struct hd_struct *part, int value) | |
313 | { | |
314 | memset(&part->dkstats, value, sizeof(struct disk_stats)); | |
315 | } | |
316 | ||
a8ae50ba | 317 | #endif /* CONFIG_SMP */ |
1da177e4 | 318 | |
c9959059 TH |
319 | #define disk_stat_dec(cpu, gendiskp, field) \ |
320 | disk_stat_add(cpu, gendiskp, field, -1) | |
321 | #define disk_stat_inc(cpu, gendiskp, field) \ | |
322 | disk_stat_add(cpu, gendiskp, field, 1) | |
323 | #define disk_stat_sub(cpu, gendiskp, field, subnd) \ | |
324 | disk_stat_add(cpu, gendiskp, field, -subnd) | |
325 | ||
326 | #define part_stat_dec(cpu, gendiskp, field) \ | |
327 | part_stat_add(cpu, gendiskp, field, -1) | |
328 | #define part_stat_inc(cpu, gendiskp, field) \ | |
329 | part_stat_add(cpu, gendiskp, field, 1) | |
330 | #define part_stat_sub(cpu, gendiskp, field, subnd) \ | |
331 | part_stat_add(cpu, gendiskp, field, -subnd) | |
332 | ||
333 | #define all_stat_dec(cpu, gendiskp, field, sector) \ | |
334 | all_stat_add(cpu, gendiskp, field, -1, sector) | |
335 | #define all_stat_inc(cpu, gendiskp, part, field, sector) \ | |
336 | all_stat_add(cpu, gendiskp, part, field, 1, sector) | |
337 | #define all_stat_sub(cpu, gendiskp, part, field, subnd, sector) \ | |
338 | all_stat_add(cpu, gendiskp, part, field, -subnd, sector) | |
1da177e4 LT |
339 | |
340 | /* Inlines to alloc and free disk stats in struct gendisk */ | |
341 | #ifdef CONFIG_SMP | |
342 | static inline int init_disk_stats(struct gendisk *disk) | |
343 | { | |
344 | disk->dkstats = alloc_percpu(struct disk_stats); | |
345 | if (!disk->dkstats) | |
346 | return 0; | |
347 | return 1; | |
348 | } | |
349 | ||
350 | static inline void free_disk_stats(struct gendisk *disk) | |
351 | { | |
352 | free_percpu(disk->dkstats); | |
353 | } | |
ea5c48ab JM |
354 | |
355 | static inline int init_part_stats(struct hd_struct *part) | |
356 | { | |
357 | part->dkstats = alloc_percpu(struct disk_stats); | |
358 | if (!part->dkstats) | |
359 | return 0; | |
360 | return 1; | |
361 | } | |
362 | ||
363 | static inline void free_part_stats(struct hd_struct *part) | |
364 | { | |
365 | free_percpu(part->dkstats); | |
366 | } | |
367 | ||
1da177e4 LT |
368 | #else /* CONFIG_SMP */ |
369 | static inline int init_disk_stats(struct gendisk *disk) | |
370 | { | |
371 | return 1; | |
372 | } | |
373 | ||
374 | static inline void free_disk_stats(struct gendisk *disk) | |
375 | { | |
376 | } | |
ea5c48ab JM |
377 | |
378 | static inline int init_part_stats(struct hd_struct *part) | |
379 | { | |
380 | return 1; | |
381 | } | |
382 | ||
383 | static inline void free_part_stats(struct hd_struct *part) | |
384 | { | |
385 | } | |
1da177e4 LT |
386 | #endif /* CONFIG_SMP */ |
387 | ||
388 | /* drivers/block/ll_rw_blk.c */ | |
c9959059 TH |
389 | extern void disk_round_stats(int cpu, struct gendisk *disk); |
390 | extern void part_round_stats(int cpu, struct hd_struct *part); | |
1da177e4 LT |
391 | |
392 | /* drivers/block/genhd.c */ | |
ac20427e | 393 | extern int get_blkdev_list(char *, int); |
1da177e4 LT |
394 | extern void add_disk(struct gendisk *disk); |
395 | extern void del_gendisk(struct gendisk *gp); | |
396 | extern void unlink_gendisk(struct gendisk *gp); | |
cf771cb5 | 397 | extern struct gendisk *get_gendisk(dev_t dev, int *partno); |
f331c029 | 398 | extern struct block_device *bdget_disk(struct gendisk *disk, int partno); |
1da177e4 LT |
399 | |
400 | extern void set_device_ro(struct block_device *bdev, int flag); | |
401 | extern void set_disk_ro(struct gendisk *disk, int flag); | |
402 | ||
403 | /* drivers/char/random.c */ | |
404 | extern void add_disk_randomness(struct gendisk *disk); | |
405 | extern void rand_initialize_disk(struct gendisk *disk); | |
406 | ||
407 | static inline sector_t get_start_sect(struct block_device *bdev) | |
408 | { | |
409 | return bdev->bd_contains == bdev ? 0 : bdev->bd_part->start_sect; | |
410 | } | |
411 | static inline sector_t get_capacity(struct gendisk *disk) | |
412 | { | |
80795aef | 413 | return disk->part0.nr_sects; |
1da177e4 LT |
414 | } |
415 | static inline void set_capacity(struct gendisk *disk, sector_t size) | |
416 | { | |
80795aef | 417 | disk->part0.nr_sects = size; |
1da177e4 LT |
418 | } |
419 | ||
1da177e4 LT |
420 | #ifdef CONFIG_SOLARIS_X86_PARTITION |
421 | ||
b84d8796 | 422 | #define SOLARIS_X86_NUMSLICE 16 |
1da177e4 LT |
423 | #define SOLARIS_X86_VTOC_SANE (0x600DDEEEUL) |
424 | ||
425 | struct solaris_x86_slice { | |
426 | __le16 s_tag; /* ID tag of partition */ | |
427 | __le16 s_flag; /* permission flags */ | |
428 | __le32 s_start; /* start sector no of partition */ | |
429 | __le32 s_size; /* # of blocks in partition */ | |
430 | }; | |
431 | ||
432 | struct solaris_x86_vtoc { | |
433 | unsigned int v_bootinfo[3]; /* info needed by mboot (unsupported) */ | |
434 | __le32 v_sanity; /* to verify vtoc sanity */ | |
435 | __le32 v_version; /* layout version */ | |
436 | char v_volume[8]; /* volume name */ | |
437 | __le16 v_sectorsz; /* sector size in bytes */ | |
438 | __le16 v_nparts; /* number of partitions */ | |
439 | unsigned int v_reserved[10]; /* free space */ | |
440 | struct solaris_x86_slice | |
441 | v_slice[SOLARIS_X86_NUMSLICE]; /* slice headers */ | |
442 | unsigned int timestamp[SOLARIS_X86_NUMSLICE]; /* timestamp (unsupported) */ | |
443 | char v_asciilabel[128]; /* for compatibility */ | |
444 | }; | |
445 | ||
446 | #endif /* CONFIG_SOLARIS_X86_PARTITION */ | |
447 | ||
448 | #ifdef CONFIG_BSD_DISKLABEL | |
449 | /* | |
450 | * BSD disklabel support by Yossi Gottlieb <yogo@math.tau.ac.il> | |
451 | * updated by Marc Espie <Marc.Espie@openbsd.org> | |
452 | */ | |
453 | ||
454 | /* check against BSD src/sys/sys/disklabel.h for consistency */ | |
455 | ||
456 | #define BSD_DISKMAGIC (0x82564557UL) /* The disk magic number */ | |
457 | #define BSD_MAXPARTITIONS 16 | |
458 | #define OPENBSD_MAXPARTITIONS 16 | |
459 | #define BSD_FS_UNUSED 0 /* disklabel unused partition entry ID */ | |
460 | struct bsd_disklabel { | |
461 | __le32 d_magic; /* the magic number */ | |
462 | __s16 d_type; /* drive type */ | |
463 | __s16 d_subtype; /* controller/d_type specific */ | |
464 | char d_typename[16]; /* type name, e.g. "eagle" */ | |
465 | char d_packname[16]; /* pack identifier */ | |
466 | __u32 d_secsize; /* # of bytes per sector */ | |
467 | __u32 d_nsectors; /* # of data sectors per track */ | |
468 | __u32 d_ntracks; /* # of tracks per cylinder */ | |
469 | __u32 d_ncylinders; /* # of data cylinders per unit */ | |
470 | __u32 d_secpercyl; /* # of data sectors per cylinder */ | |
471 | __u32 d_secperunit; /* # of data sectors per unit */ | |
472 | __u16 d_sparespertrack; /* # of spare sectors per track */ | |
473 | __u16 d_sparespercyl; /* # of spare sectors per cylinder */ | |
474 | __u32 d_acylinders; /* # of alt. cylinders per unit */ | |
475 | __u16 d_rpm; /* rotational speed */ | |
476 | __u16 d_interleave; /* hardware sector interleave */ | |
477 | __u16 d_trackskew; /* sector 0 skew, per track */ | |
478 | __u16 d_cylskew; /* sector 0 skew, per cylinder */ | |
479 | __u32 d_headswitch; /* head switch time, usec */ | |
480 | __u32 d_trkseek; /* track-to-track seek, usec */ | |
481 | __u32 d_flags; /* generic flags */ | |
482 | #define NDDATA 5 | |
483 | __u32 d_drivedata[NDDATA]; /* drive-type specific information */ | |
484 | #define NSPARE 5 | |
485 | __u32 d_spare[NSPARE]; /* reserved for future use */ | |
486 | __le32 d_magic2; /* the magic number (again) */ | |
487 | __le16 d_checksum; /* xor of data incl. partitions */ | |
488 | ||
489 | /* filesystem and partition information: */ | |
490 | __le16 d_npartitions; /* number of partitions in following */ | |
491 | __le32 d_bbsize; /* size of boot area at sn0, bytes */ | |
492 | __le32 d_sbsize; /* max size of fs superblock, bytes */ | |
493 | struct bsd_partition { /* the partition table */ | |
494 | __le32 p_size; /* number of sectors in partition */ | |
495 | __le32 p_offset; /* starting sector */ | |
496 | __le32 p_fsize; /* filesystem basic fragment size */ | |
497 | __u8 p_fstype; /* filesystem type, see below */ | |
498 | __u8 p_frag; /* filesystem fragments per block */ | |
499 | __le16 p_cpg; /* filesystem cylinders per group */ | |
500 | } d_partitions[BSD_MAXPARTITIONS]; /* actually may be more */ | |
501 | }; | |
502 | ||
503 | #endif /* CONFIG_BSD_DISKLABEL */ | |
504 | ||
505 | #ifdef CONFIG_UNIXWARE_DISKLABEL | |
506 | /* | |
507 | * Unixware slices support by Andrzej Krzysztofowicz <ankry@mif.pg.gda.pl> | |
508 | * and Krzysztof G. Baranowski <kgb@knm.org.pl> | |
509 | */ | |
510 | ||
511 | #define UNIXWARE_DISKMAGIC (0xCA5E600DUL) /* The disk magic number */ | |
512 | #define UNIXWARE_DISKMAGIC2 (0x600DDEEEUL) /* The slice table magic nr */ | |
513 | #define UNIXWARE_NUMSLICE 16 | |
514 | #define UNIXWARE_FS_UNUSED 0 /* Unused slice entry ID */ | |
515 | ||
516 | struct unixware_slice { | |
517 | __le16 s_label; /* label */ | |
518 | __le16 s_flags; /* permission flags */ | |
519 | __le32 start_sect; /* starting sector */ | |
520 | __le32 nr_sects; /* number of sectors in slice */ | |
521 | }; | |
522 | ||
523 | struct unixware_disklabel { | |
524 | __le32 d_type; /* drive type */ | |
525 | __le32 d_magic; /* the magic number */ | |
526 | __le32 d_version; /* version number */ | |
527 | char d_serial[12]; /* serial number of the device */ | |
528 | __le32 d_ncylinders; /* # of data cylinders per device */ | |
529 | __le32 d_ntracks; /* # of tracks per cylinder */ | |
530 | __le32 d_nsectors; /* # of data sectors per track */ | |
531 | __le32 d_secsize; /* # of bytes per sector */ | |
532 | __le32 d_part_start; /* # of first sector of this partition */ | |
533 | __le32 d_unknown1[12]; /* ? */ | |
534 | __le32 d_alt_tbl; /* byte offset of alternate table */ | |
535 | __le32 d_alt_len; /* byte length of alternate table */ | |
536 | __le32 d_phys_cyl; /* # of physical cylinders per device */ | |
537 | __le32 d_phys_trk; /* # of physical tracks per cylinder */ | |
538 | __le32 d_phys_sec; /* # of physical sectors per track */ | |
539 | __le32 d_phys_bytes; /* # of physical bytes per sector */ | |
540 | __le32 d_unknown2; /* ? */ | |
541 | __le32 d_unknown3; /* ? */ | |
542 | __le32 d_pad[8]; /* pad */ | |
543 | ||
544 | struct unixware_vtoc { | |
545 | __le32 v_magic; /* the magic number */ | |
546 | __le32 v_version; /* version number */ | |
547 | char v_name[8]; /* volume name */ | |
548 | __le16 v_nslices; /* # of slices */ | |
549 | __le16 v_unknown1; /* ? */ | |
550 | __le32 v_reserved[10]; /* reserved */ | |
551 | struct unixware_slice | |
552 | v_slice[UNIXWARE_NUMSLICE]; /* slice headers */ | |
553 | } vtoc; | |
554 | ||
555 | }; /* 408 */ | |
556 | ||
557 | #endif /* CONFIG_UNIXWARE_DISKLABEL */ | |
558 | ||
559 | #ifdef CONFIG_MINIX_SUBPARTITION | |
560 | # define MINIX_NR_SUBPARTITIONS 4 | |
561 | #endif /* CONFIG_MINIX_SUBPARTITION */ | |
562 | ||
d18d7682 FMDN |
563 | #define ADDPART_FLAG_NONE 0 |
564 | #define ADDPART_FLAG_RAID 1 | |
565 | #define ADDPART_FLAG_WHOLEDISK 2 | |
566 | ||
bcce3de1 TH |
567 | extern int blk_alloc_devt(struct hd_struct *part, dev_t *devt); |
568 | extern void blk_free_devt(dev_t devt); | |
cf771cb5 TH |
569 | extern dev_t blk_lookup_devt(const char *name, int partno); |
570 | extern char *disk_name (struct gendisk *hd, int partno, char *buf); | |
1da177e4 LT |
571 | |
572 | extern int rescan_partitions(struct gendisk *disk, struct block_device *bdev); | |
d805dda4 | 573 | extern int __must_check add_partition(struct gendisk *, int, sector_t, sector_t, int); |
1da177e4 | 574 | extern void delete_partition(struct gendisk *, int); |
dd2a345f | 575 | extern void printk_all_partitions(void); |
1da177e4 | 576 | |
1946089a | 577 | extern struct gendisk *alloc_disk_node(int minors, int node_id); |
1da177e4 | 578 | extern struct gendisk *alloc_disk(int minors); |
bcce3de1 TH |
579 | extern struct gendisk *alloc_disk_ext_node(int minors, int ext_minrs, |
580 | int node_id); | |
581 | extern struct gendisk *alloc_disk_ext(int minors, int ext_minors); | |
1da177e4 LT |
582 | extern struct kobject *get_disk(struct gendisk *disk); |
583 | extern void put_disk(struct gendisk *disk); | |
edfaa7c3 | 584 | extern void blk_register_region(dev_t devt, unsigned long range, |
1da177e4 LT |
585 | struct module *module, |
586 | struct kobject *(*probe)(dev_t, int *, void *), | |
587 | int (*lock)(dev_t, void *), | |
588 | void *data); | |
edfaa7c3 | 589 | extern void blk_unregister_region(dev_t devt, unsigned long range); |
1da177e4 | 590 | |
87c1efbf JA |
591 | #else /* CONFIG_BLOCK */ |
592 | ||
593 | static inline void printk_all_partitions(void) { } | |
594 | ||
cf771cb5 | 595 | static inline dev_t blk_lookup_devt(const char *name, int partno) |
edfaa7c3 KS |
596 | { |
597 | dev_t devt = MKDEV(0, 0); | |
598 | return devt; | |
599 | } | |
600 | ||
87c1efbf | 601 | #endif /* CONFIG_BLOCK */ |
9361401e | 602 | |
a8ae50ba | 603 | #endif /* _LINUX_GENHD_H */ |