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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 TH |
129 | |
130 | /* Array of pointers to partitions indexed by partno - 1. | |
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; | |
136 | ||
1da177e4 LT |
137 | struct block_device_operations *fops; |
138 | struct request_queue *queue; | |
139 | void *private_data; | |
140 | sector_t capacity; | |
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 | { | |
bcce3de1 | 174 | return disk->minors + disk->ext_minors - 1; |
f331c029 TH |
175 | } |
176 | ||
177 | static inline dev_t disk_devt(struct gendisk *disk) | |
178 | { | |
ed9e1982 | 179 | return disk_to_dev(disk)->devt; |
f331c029 TH |
180 | } |
181 | ||
182 | static inline dev_t part_devt(struct hd_struct *part) | |
183 | { | |
ed9e1982 | 184 | return part_to_dev(part)->devt; |
f331c029 TH |
185 | } |
186 | ||
e71bf0d0 TH |
187 | extern struct hd_struct *disk_get_part(struct gendisk *disk, int partno); |
188 | ||
189 | static inline void disk_put_part(struct hd_struct *part) | |
190 | { | |
191 | if (likely(part)) | |
ed9e1982 | 192 | put_device(part_to_dev(part)); |
e71bf0d0 TH |
193 | } |
194 | ||
195 | /* | |
196 | * Smarter partition iterator without context limits. | |
197 | */ | |
198 | #define DISK_PITER_REVERSE (1 << 0) /* iterate in the reverse direction */ | |
199 | #define DISK_PITER_INCL_EMPTY (1 << 1) /* include 0-sized parts */ | |
200 | ||
201 | struct disk_part_iter { | |
202 | struct gendisk *disk; | |
203 | struct hd_struct *part; | |
204 | int idx; | |
205 | unsigned int flags; | |
206 | }; | |
207 | ||
208 | extern void disk_part_iter_init(struct disk_part_iter *piter, | |
209 | struct gendisk *disk, unsigned int flags); | |
210 | extern struct hd_struct *disk_part_iter_next(struct disk_part_iter *piter); | |
211 | extern void disk_part_iter_exit(struct disk_part_iter *piter); | |
212 | ||
213 | extern struct hd_struct *disk_map_sector_rcu(struct gendisk *disk, | |
214 | sector_t sector); | |
215 | ||
c9959059 | 216 | /* |
1da177e4 LT |
217 | * Macros to operate on percpu disk statistics: |
218 | * | |
c9959059 TH |
219 | * {disk|part|all}_stat_{add|sub|inc|dec}() modify the stat counters |
220 | * and should be called between disk_stat_lock() and | |
221 | * disk_stat_unlock(). | |
222 | * | |
223 | * part_stat_read() can be called at any time. | |
224 | * | |
225 | * part_stat_{add|set_all}() and {init|free}_part_stats are for | |
226 | * internal use only. | |
1da177e4 LT |
227 | */ |
228 | #ifdef CONFIG_SMP | |
c9959059 TH |
229 | #define disk_stat_lock() ({ rcu_read_lock(); get_cpu(); }) |
230 | #define disk_stat_unlock() do { put_cpu(); rcu_read_unlock(); } while (0) | |
231 | ||
232 | #define disk_stat_add(cpu, gendiskp, field, addnd) \ | |
233 | (per_cpu_ptr(gendiskp->dkstats, cpu)->field += addnd) | |
1da177e4 LT |
234 | |
235 | #define disk_stat_read(gendiskp, field) \ | |
236 | ({ \ | |
237 | typeof(gendiskp->dkstats->field) res = 0; \ | |
238 | int i; \ | |
0a945022 | 239 | for_each_possible_cpu(i) \ |
1da177e4 | 240 | res += per_cpu_ptr(gendiskp->dkstats, i)->field; \ |
1da177e4 LT |
241 | res; \ |
242 | }) | |
243 | ||
c9959059 TH |
244 | static inline void disk_stat_set_all(struct gendisk *gendiskp, int value) |
245 | { | |
1da177e4 | 246 | int i; |
28f13702 | 247 | |
0a945022 | 248 | for_each_possible_cpu(i) |
394e3902 | 249 | memset(per_cpu_ptr(gendiskp->dkstats, i), value, |
28f13702 | 250 | sizeof(struct disk_stats)); |
1da177e4 | 251 | } |
ea5c48ab | 252 | |
c9959059 TH |
253 | #define part_stat_add(cpu, part, field, addnd) \ |
254 | (per_cpu_ptr(part->dkstats, cpu)->field += addnd) | |
ea5c48ab | 255 | |
c9959059 TH |
256 | #define all_stat_add(cpu, gendiskp, part, field, addnd, sector) \ |
257 | ({ \ | |
258 | if (part) \ | |
259 | part_stat_add(cpu, part, field, addnd); \ | |
260 | disk_stat_add(cpu, gendiskp, field, addnd); \ | |
ea5c48ab JM |
261 | }) |
262 | ||
263 | #define part_stat_read(part, field) \ | |
264 | ({ \ | |
265 | typeof(part->dkstats->field) res = 0; \ | |
266 | int i; \ | |
267 | for_each_possible_cpu(i) \ | |
268 | res += per_cpu_ptr(part->dkstats, i)->field; \ | |
269 | res; \ | |
270 | }) | |
271 | ||
28f13702 JA |
272 | static inline void part_stat_set_all(struct hd_struct *part, int value) |
273 | { | |
ea5c48ab | 274 | int i; |
28f13702 | 275 | |
ea5c48ab JM |
276 | for_each_possible_cpu(i) |
277 | memset(per_cpu_ptr(part->dkstats, i), value, | |
28f13702 | 278 | sizeof(struct disk_stats)); |
ea5c48ab | 279 | } |
c9959059 | 280 | |
a8ae50ba | 281 | #else /* !CONFIG_SMP */ |
c9959059 TH |
282 | #define disk_stat_lock() ({ rcu_read_lock(); 0; }) |
283 | #define disk_stat_unlock() rcu_read_unlock() | |
284 | ||
285 | #define disk_stat_add(cpu, gendiskp, field, addnd) \ | |
286 | (gendiskp->dkstats.field += addnd) | |
1da177e4 LT |
287 | #define disk_stat_read(gendiskp, field) (gendiskp->dkstats.field) |
288 | ||
ea5c48ab JM |
289 | static inline void disk_stat_set_all(struct gendisk *gendiskp, int value) |
290 | { | |
1da177e4 LT |
291 | memset(&gendiskp->dkstats, value, sizeof (struct disk_stats)); |
292 | } | |
ea5c48ab | 293 | |
c9959059 | 294 | #define part_stat_add(cpu, part, field, addnd) \ |
ea5c48ab JM |
295 | (part->dkstats.field += addnd) |
296 | ||
c9959059 TH |
297 | #define all_stat_add(cpu, gendiskp, part, field, addnd, sector) \ |
298 | ({ \ | |
299 | if (part) \ | |
300 | part_stat_add(cpu, part, field, addnd); \ | |
301 | disk_stat_add(cpu, gendiskp, field, addnd); \ | |
ea5c48ab JM |
302 | }) |
303 | ||
304 | #define part_stat_read(part, field) (part->dkstats.field) | |
305 | ||
306 | static inline void part_stat_set_all(struct hd_struct *part, int value) | |
307 | { | |
308 | memset(&part->dkstats, value, sizeof(struct disk_stats)); | |
309 | } | |
310 | ||
a8ae50ba | 311 | #endif /* CONFIG_SMP */ |
1da177e4 | 312 | |
c9959059 TH |
313 | #define disk_stat_dec(cpu, gendiskp, field) \ |
314 | disk_stat_add(cpu, gendiskp, field, -1) | |
315 | #define disk_stat_inc(cpu, gendiskp, field) \ | |
316 | disk_stat_add(cpu, gendiskp, field, 1) | |
317 | #define disk_stat_sub(cpu, gendiskp, field, subnd) \ | |
318 | disk_stat_add(cpu, gendiskp, field, -subnd) | |
319 | ||
320 | #define part_stat_dec(cpu, gendiskp, field) \ | |
321 | part_stat_add(cpu, gendiskp, field, -1) | |
322 | #define part_stat_inc(cpu, gendiskp, field) \ | |
323 | part_stat_add(cpu, gendiskp, field, 1) | |
324 | #define part_stat_sub(cpu, gendiskp, field, subnd) \ | |
325 | part_stat_add(cpu, gendiskp, field, -subnd) | |
326 | ||
327 | #define all_stat_dec(cpu, gendiskp, field, sector) \ | |
328 | all_stat_add(cpu, gendiskp, field, -1, sector) | |
329 | #define all_stat_inc(cpu, gendiskp, part, field, sector) \ | |
330 | all_stat_add(cpu, gendiskp, part, field, 1, sector) | |
331 | #define all_stat_sub(cpu, gendiskp, part, field, subnd, sector) \ | |
332 | all_stat_add(cpu, gendiskp, part, field, -subnd, sector) | |
1da177e4 LT |
333 | |
334 | /* Inlines to alloc and free disk stats in struct gendisk */ | |
335 | #ifdef CONFIG_SMP | |
336 | static inline int init_disk_stats(struct gendisk *disk) | |
337 | { | |
338 | disk->dkstats = alloc_percpu(struct disk_stats); | |
339 | if (!disk->dkstats) | |
340 | return 0; | |
341 | return 1; | |
342 | } | |
343 | ||
344 | static inline void free_disk_stats(struct gendisk *disk) | |
345 | { | |
346 | free_percpu(disk->dkstats); | |
347 | } | |
ea5c48ab JM |
348 | |
349 | static inline int init_part_stats(struct hd_struct *part) | |
350 | { | |
351 | part->dkstats = alloc_percpu(struct disk_stats); | |
352 | if (!part->dkstats) | |
353 | return 0; | |
354 | return 1; | |
355 | } | |
356 | ||
357 | static inline void free_part_stats(struct hd_struct *part) | |
358 | { | |
359 | free_percpu(part->dkstats); | |
360 | } | |
361 | ||
1da177e4 LT |
362 | #else /* CONFIG_SMP */ |
363 | static inline int init_disk_stats(struct gendisk *disk) | |
364 | { | |
365 | return 1; | |
366 | } | |
367 | ||
368 | static inline void free_disk_stats(struct gendisk *disk) | |
369 | { | |
370 | } | |
ea5c48ab JM |
371 | |
372 | static inline int init_part_stats(struct hd_struct *part) | |
373 | { | |
374 | return 1; | |
375 | } | |
376 | ||
377 | static inline void free_part_stats(struct hd_struct *part) | |
378 | { | |
379 | } | |
1da177e4 LT |
380 | #endif /* CONFIG_SMP */ |
381 | ||
382 | /* drivers/block/ll_rw_blk.c */ | |
c9959059 TH |
383 | extern void disk_round_stats(int cpu, struct gendisk *disk); |
384 | extern void part_round_stats(int cpu, struct hd_struct *part); | |
1da177e4 LT |
385 | |
386 | /* drivers/block/genhd.c */ | |
ac20427e | 387 | extern int get_blkdev_list(char *, int); |
1da177e4 LT |
388 | extern void add_disk(struct gendisk *disk); |
389 | extern void del_gendisk(struct gendisk *gp); | |
390 | extern void unlink_gendisk(struct gendisk *gp); | |
cf771cb5 | 391 | extern struct gendisk *get_gendisk(dev_t dev, int *partno); |
f331c029 | 392 | extern struct block_device *bdget_disk(struct gendisk *disk, int partno); |
1da177e4 LT |
393 | |
394 | extern void set_device_ro(struct block_device *bdev, int flag); | |
395 | extern void set_disk_ro(struct gendisk *disk, int flag); | |
396 | ||
397 | /* drivers/char/random.c */ | |
398 | extern void add_disk_randomness(struct gendisk *disk); | |
399 | extern void rand_initialize_disk(struct gendisk *disk); | |
400 | ||
401 | static inline sector_t get_start_sect(struct block_device *bdev) | |
402 | { | |
403 | return bdev->bd_contains == bdev ? 0 : bdev->bd_part->start_sect; | |
404 | } | |
405 | static inline sector_t get_capacity(struct gendisk *disk) | |
406 | { | |
407 | return disk->capacity; | |
408 | } | |
409 | static inline void set_capacity(struct gendisk *disk, sector_t size) | |
410 | { | |
411 | disk->capacity = size; | |
412 | } | |
413 | ||
1da177e4 LT |
414 | #ifdef CONFIG_SOLARIS_X86_PARTITION |
415 | ||
b84d8796 | 416 | #define SOLARIS_X86_NUMSLICE 16 |
1da177e4 LT |
417 | #define SOLARIS_X86_VTOC_SANE (0x600DDEEEUL) |
418 | ||
419 | struct solaris_x86_slice { | |
420 | __le16 s_tag; /* ID tag of partition */ | |
421 | __le16 s_flag; /* permission flags */ | |
422 | __le32 s_start; /* start sector no of partition */ | |
423 | __le32 s_size; /* # of blocks in partition */ | |
424 | }; | |
425 | ||
426 | struct solaris_x86_vtoc { | |
427 | unsigned int v_bootinfo[3]; /* info needed by mboot (unsupported) */ | |
428 | __le32 v_sanity; /* to verify vtoc sanity */ | |
429 | __le32 v_version; /* layout version */ | |
430 | char v_volume[8]; /* volume name */ | |
431 | __le16 v_sectorsz; /* sector size in bytes */ | |
432 | __le16 v_nparts; /* number of partitions */ | |
433 | unsigned int v_reserved[10]; /* free space */ | |
434 | struct solaris_x86_slice | |
435 | v_slice[SOLARIS_X86_NUMSLICE]; /* slice headers */ | |
436 | unsigned int timestamp[SOLARIS_X86_NUMSLICE]; /* timestamp (unsupported) */ | |
437 | char v_asciilabel[128]; /* for compatibility */ | |
438 | }; | |
439 | ||
440 | #endif /* CONFIG_SOLARIS_X86_PARTITION */ | |
441 | ||
442 | #ifdef CONFIG_BSD_DISKLABEL | |
443 | /* | |
444 | * BSD disklabel support by Yossi Gottlieb <yogo@math.tau.ac.il> | |
445 | * updated by Marc Espie <Marc.Espie@openbsd.org> | |
446 | */ | |
447 | ||
448 | /* check against BSD src/sys/sys/disklabel.h for consistency */ | |
449 | ||
450 | #define BSD_DISKMAGIC (0x82564557UL) /* The disk magic number */ | |
451 | #define BSD_MAXPARTITIONS 16 | |
452 | #define OPENBSD_MAXPARTITIONS 16 | |
453 | #define BSD_FS_UNUSED 0 /* disklabel unused partition entry ID */ | |
454 | struct bsd_disklabel { | |
455 | __le32 d_magic; /* the magic number */ | |
456 | __s16 d_type; /* drive type */ | |
457 | __s16 d_subtype; /* controller/d_type specific */ | |
458 | char d_typename[16]; /* type name, e.g. "eagle" */ | |
459 | char d_packname[16]; /* pack identifier */ | |
460 | __u32 d_secsize; /* # of bytes per sector */ | |
461 | __u32 d_nsectors; /* # of data sectors per track */ | |
462 | __u32 d_ntracks; /* # of tracks per cylinder */ | |
463 | __u32 d_ncylinders; /* # of data cylinders per unit */ | |
464 | __u32 d_secpercyl; /* # of data sectors per cylinder */ | |
465 | __u32 d_secperunit; /* # of data sectors per unit */ | |
466 | __u16 d_sparespertrack; /* # of spare sectors per track */ | |
467 | __u16 d_sparespercyl; /* # of spare sectors per cylinder */ | |
468 | __u32 d_acylinders; /* # of alt. cylinders per unit */ | |
469 | __u16 d_rpm; /* rotational speed */ | |
470 | __u16 d_interleave; /* hardware sector interleave */ | |
471 | __u16 d_trackskew; /* sector 0 skew, per track */ | |
472 | __u16 d_cylskew; /* sector 0 skew, per cylinder */ | |
473 | __u32 d_headswitch; /* head switch time, usec */ | |
474 | __u32 d_trkseek; /* track-to-track seek, usec */ | |
475 | __u32 d_flags; /* generic flags */ | |
476 | #define NDDATA 5 | |
477 | __u32 d_drivedata[NDDATA]; /* drive-type specific information */ | |
478 | #define NSPARE 5 | |
479 | __u32 d_spare[NSPARE]; /* reserved for future use */ | |
480 | __le32 d_magic2; /* the magic number (again) */ | |
481 | __le16 d_checksum; /* xor of data incl. partitions */ | |
482 | ||
483 | /* filesystem and partition information: */ | |
484 | __le16 d_npartitions; /* number of partitions in following */ | |
485 | __le32 d_bbsize; /* size of boot area at sn0, bytes */ | |
486 | __le32 d_sbsize; /* max size of fs superblock, bytes */ | |
487 | struct bsd_partition { /* the partition table */ | |
488 | __le32 p_size; /* number of sectors in partition */ | |
489 | __le32 p_offset; /* starting sector */ | |
490 | __le32 p_fsize; /* filesystem basic fragment size */ | |
491 | __u8 p_fstype; /* filesystem type, see below */ | |
492 | __u8 p_frag; /* filesystem fragments per block */ | |
493 | __le16 p_cpg; /* filesystem cylinders per group */ | |
494 | } d_partitions[BSD_MAXPARTITIONS]; /* actually may be more */ | |
495 | }; | |
496 | ||
497 | #endif /* CONFIG_BSD_DISKLABEL */ | |
498 | ||
499 | #ifdef CONFIG_UNIXWARE_DISKLABEL | |
500 | /* | |
501 | * Unixware slices support by Andrzej Krzysztofowicz <ankry@mif.pg.gda.pl> | |
502 | * and Krzysztof G. Baranowski <kgb@knm.org.pl> | |
503 | */ | |
504 | ||
505 | #define UNIXWARE_DISKMAGIC (0xCA5E600DUL) /* The disk magic number */ | |
506 | #define UNIXWARE_DISKMAGIC2 (0x600DDEEEUL) /* The slice table magic nr */ | |
507 | #define UNIXWARE_NUMSLICE 16 | |
508 | #define UNIXWARE_FS_UNUSED 0 /* Unused slice entry ID */ | |
509 | ||
510 | struct unixware_slice { | |
511 | __le16 s_label; /* label */ | |
512 | __le16 s_flags; /* permission flags */ | |
513 | __le32 start_sect; /* starting sector */ | |
514 | __le32 nr_sects; /* number of sectors in slice */ | |
515 | }; | |
516 | ||
517 | struct unixware_disklabel { | |
518 | __le32 d_type; /* drive type */ | |
519 | __le32 d_magic; /* the magic number */ | |
520 | __le32 d_version; /* version number */ | |
521 | char d_serial[12]; /* serial number of the device */ | |
522 | __le32 d_ncylinders; /* # of data cylinders per device */ | |
523 | __le32 d_ntracks; /* # of tracks per cylinder */ | |
524 | __le32 d_nsectors; /* # of data sectors per track */ | |
525 | __le32 d_secsize; /* # of bytes per sector */ | |
526 | __le32 d_part_start; /* # of first sector of this partition */ | |
527 | __le32 d_unknown1[12]; /* ? */ | |
528 | __le32 d_alt_tbl; /* byte offset of alternate table */ | |
529 | __le32 d_alt_len; /* byte length of alternate table */ | |
530 | __le32 d_phys_cyl; /* # of physical cylinders per device */ | |
531 | __le32 d_phys_trk; /* # of physical tracks per cylinder */ | |
532 | __le32 d_phys_sec; /* # of physical sectors per track */ | |
533 | __le32 d_phys_bytes; /* # of physical bytes per sector */ | |
534 | __le32 d_unknown2; /* ? */ | |
535 | __le32 d_unknown3; /* ? */ | |
536 | __le32 d_pad[8]; /* pad */ | |
537 | ||
538 | struct unixware_vtoc { | |
539 | __le32 v_magic; /* the magic number */ | |
540 | __le32 v_version; /* version number */ | |
541 | char v_name[8]; /* volume name */ | |
542 | __le16 v_nslices; /* # of slices */ | |
543 | __le16 v_unknown1; /* ? */ | |
544 | __le32 v_reserved[10]; /* reserved */ | |
545 | struct unixware_slice | |
546 | v_slice[UNIXWARE_NUMSLICE]; /* slice headers */ | |
547 | } vtoc; | |
548 | ||
549 | }; /* 408 */ | |
550 | ||
551 | #endif /* CONFIG_UNIXWARE_DISKLABEL */ | |
552 | ||
553 | #ifdef CONFIG_MINIX_SUBPARTITION | |
554 | # define MINIX_NR_SUBPARTITIONS 4 | |
555 | #endif /* CONFIG_MINIX_SUBPARTITION */ | |
556 | ||
d18d7682 FMDN |
557 | #define ADDPART_FLAG_NONE 0 |
558 | #define ADDPART_FLAG_RAID 1 | |
559 | #define ADDPART_FLAG_WHOLEDISK 2 | |
560 | ||
bcce3de1 TH |
561 | extern int blk_alloc_devt(struct hd_struct *part, dev_t *devt); |
562 | extern void blk_free_devt(dev_t devt); | |
cf771cb5 TH |
563 | extern dev_t blk_lookup_devt(const char *name, int partno); |
564 | extern char *disk_name (struct gendisk *hd, int partno, char *buf); | |
1da177e4 LT |
565 | |
566 | extern int rescan_partitions(struct gendisk *disk, struct block_device *bdev); | |
d805dda4 | 567 | extern int __must_check add_partition(struct gendisk *, int, sector_t, sector_t, int); |
1da177e4 | 568 | extern void delete_partition(struct gendisk *, int); |
dd2a345f | 569 | extern void printk_all_partitions(void); |
1da177e4 | 570 | |
1946089a | 571 | extern struct gendisk *alloc_disk_node(int minors, int node_id); |
1da177e4 | 572 | extern struct gendisk *alloc_disk(int minors); |
bcce3de1 TH |
573 | extern struct gendisk *alloc_disk_ext_node(int minors, int ext_minrs, |
574 | int node_id); | |
575 | extern struct gendisk *alloc_disk_ext(int minors, int ext_minors); | |
1da177e4 LT |
576 | extern struct kobject *get_disk(struct gendisk *disk); |
577 | extern void put_disk(struct gendisk *disk); | |
edfaa7c3 | 578 | extern void blk_register_region(dev_t devt, unsigned long range, |
1da177e4 LT |
579 | struct module *module, |
580 | struct kobject *(*probe)(dev_t, int *, void *), | |
581 | int (*lock)(dev_t, void *), | |
582 | void *data); | |
edfaa7c3 | 583 | extern void blk_unregister_region(dev_t devt, unsigned long range); |
1da177e4 | 584 | |
87c1efbf JA |
585 | #else /* CONFIG_BLOCK */ |
586 | ||
587 | static inline void printk_all_partitions(void) { } | |
588 | ||
cf771cb5 | 589 | static inline dev_t blk_lookup_devt(const char *name, int partno) |
edfaa7c3 KS |
590 | { |
591 | dev_t devt = MKDEV(0, 0); | |
592 | return devt; | |
593 | } | |
594 | ||
87c1efbf | 595 | #endif /* CONFIG_BLOCK */ |
9361401e | 596 | |
a8ae50ba | 597 | #endif /* _LINUX_GENHD_H */ |