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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 | 18 | #define kobj_to_dev(k) container_of((k), struct device, kobj) |
548b10eb | 19 | #define dev_to_disk(device) container_of((device), struct gendisk, part0.__dev) |
ed9e1982 | 20 | #define dev_to_part(device) container_of((device), struct hd_struct, __dev) |
548b10eb | 21 | #define disk_to_dev(disk) (&(disk)->part0.__dev) |
ed9e1982 | 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 | ||
1da177e4 LT |
28 | enum { |
29 | /* These three have identical behaviour; use the second one if DOS FDISK gets | |
30 | confused about extended/logical partitions starting past cylinder 1023. */ | |
31 | DOS_EXTENDED_PARTITION = 5, | |
32 | LINUX_EXTENDED_PARTITION = 0x85, | |
33 | WIN98_EXTENDED_PARTITION = 0x0f, | |
34 | ||
d18d7682 FMDN |
35 | SUN_WHOLE_DISK = DOS_EXTENDED_PARTITION, |
36 | ||
1da177e4 | 37 | LINUX_SWAP_PARTITION = 0x82, |
4419d1ac OH |
38 | LINUX_DATA_PARTITION = 0x83, |
39 | LINUX_LVM_PARTITION = 0x8e, | |
1da177e4 LT |
40 | LINUX_RAID_PARTITION = 0xfd, /* autodetect RAID partition */ |
41 | ||
42 | SOLARIS_X86_PARTITION = LINUX_SWAP_PARTITION, | |
43 | NEW_SOLARIS_X86_PARTITION = 0xbf, | |
44 | ||
45 | DM6_AUX1PARTITION = 0x51, /* no DDO: use xlated geom */ | |
46 | DM6_AUX3PARTITION = 0x53, /* no DDO: use xlated geom */ | |
47 | DM6_PARTITION = 0x54, /* has DDO: use xlated geom & offset */ | |
48 | EZD_PARTITION = 0x55, /* EZ-DRIVE */ | |
49 | ||
50 | FREEBSD_PARTITION = 0xa5, /* FreeBSD Partition ID */ | |
51 | OPENBSD_PARTITION = 0xa6, /* OpenBSD Partition ID */ | |
52 | NETBSD_PARTITION = 0xa9, /* NetBSD Partition ID */ | |
53 | BSDI_PARTITION = 0xb7, /* BSDI Partition ID */ | |
54 | MINIX_PARTITION = 0x81, /* Minix Partition ID */ | |
55 | UNIXWARE_PARTITION = 0x63, /* Same as GNU_HURD and SCO Unix */ | |
56 | }; | |
57 | ||
689d6fac | 58 | #define DISK_MAX_PARTS 256 |
3e1a7ff8 | 59 | #define DISK_NAME_LEN 32 |
689d6fac | 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; | |
c72758f3 | 93 | sector_t alignment_offset; |
ed9e1982 | 94 | struct device __dev; |
6a4d44c1 | 95 | struct kobject *holder_dir; |
1da177e4 | 96 | int policy, partno; |
c17bb495 AM |
97 | #ifdef CONFIG_FAIL_MAKE_REQUEST |
98 | int make_it_fail; | |
ea5c48ab JM |
99 | #endif |
100 | unsigned long stamp; | |
0f78ab98 | 101 | int in_flight; |
ea5c48ab JM |
102 | #ifdef CONFIG_SMP |
103 | struct disk_stats *dkstats; | |
104 | #else | |
105 | struct disk_stats dkstats; | |
c17bb495 | 106 | #endif |
e71bf0d0 | 107 | struct rcu_head rcu_head; |
1da177e4 LT |
108 | }; |
109 | ||
110 | #define GENHD_FL_REMOVABLE 1 | |
111 | #define GENHD_FL_DRIVERFS 2 | |
86ce18d7 | 112 | #define GENHD_FL_MEDIA_CHANGE_NOTIFY 4 |
1da177e4 LT |
113 | #define GENHD_FL_CD 8 |
114 | #define GENHD_FL_UP 16 | |
115 | #define GENHD_FL_SUPPRESS_PARTITION_INFO 32 | |
689d6fac | 116 | #define GENHD_FL_EXT_DEVT 64 /* allow extended devt */ |
db429e9e | 117 | #define GENHD_FL_NATIVE_CAPACITY 128 |
1da177e4 | 118 | |
540eed56 TH |
119 | #define BLK_SCSI_MAX_CMDS (256) |
120 | #define BLK_SCSI_CMD_PER_LONG (BLK_SCSI_MAX_CMDS / (sizeof(long) * 8)) | |
121 | ||
122 | struct blk_scsi_cmd_filter { | |
123 | unsigned long read_ok[BLK_SCSI_CMD_PER_LONG]; | |
124 | unsigned long write_ok[BLK_SCSI_CMD_PER_LONG]; | |
125 | struct kobject kobj; | |
126 | }; | |
127 | ||
128 | struct disk_part_tbl { | |
129 | struct rcu_head rcu_head; | |
130 | int len; | |
a6f23657 | 131 | struct hd_struct *last_lookup; |
540eed56 TH |
132 | struct hd_struct *part[]; |
133 | }; | |
134 | ||
1da177e4 | 135 | struct gendisk { |
689d6fac TH |
136 | /* major, first_minor and minors are input parameters only, |
137 | * don't use directly. Use disk_devt() and disk_max_parts(). | |
f331c029 | 138 | */ |
1da177e4 LT |
139 | int major; /* major number of driver */ |
140 | int first_minor; | |
141 | int minors; /* maximum number of minors, =1 for | |
142 | * disks that can't be partitioned. */ | |
f331c029 | 143 | |
3e1a7ff8 | 144 | char disk_name[DISK_NAME_LEN]; /* name of major driver */ |
e454cea2 | 145 | char *(*devnode)(struct gendisk *gd, mode_t *mode); |
b5d0b9df | 146 | /* Array of pointers to partitions indexed by partno. |
e71bf0d0 TH |
147 | * Protected with matching bdev lock but stat and other |
148 | * non-critical accesses use RCU. Always access through | |
149 | * helpers. | |
150 | */ | |
540eed56 | 151 | struct disk_part_tbl *part_tbl; |
b5d0b9df | 152 | struct hd_struct part0; |
e71bf0d0 | 153 | |
83d5cde4 | 154 | const struct block_device_operations *fops; |
1da177e4 LT |
155 | struct request_queue *queue; |
156 | void *private_data; | |
1da177e4 LT |
157 | |
158 | int flags; | |
edfaa7c3 | 159 | struct device *driverfs_dev; // FIXME: remove |
6a4d44c1 | 160 | struct kobject *slave_dir; |
1da177e4 LT |
161 | |
162 | struct timer_rand_state *random; | |
1da177e4 LT |
163 | |
164 | atomic_t sync_io; /* RAID */ | |
8ce7ad7b | 165 | struct work_struct async_notify; |
7ba1ba12 MP |
166 | #ifdef CONFIG_BLK_DEV_INTEGRITY |
167 | struct blk_integrity *integrity; | |
168 | #endif | |
540eed56 | 169 | int node_id; |
1da177e4 LT |
170 | }; |
171 | ||
310a2c10 TH |
172 | static inline struct gendisk *part_to_disk(struct hd_struct *part) |
173 | { | |
548b10eb TH |
174 | if (likely(part)) { |
175 | if (part->partno) | |
176 | return dev_to_disk(part_to_dev(part)->parent); | |
177 | else | |
178 | return dev_to_disk(part_to_dev(part)); | |
179 | } | |
310a2c10 TH |
180 | return NULL; |
181 | } | |
182 | ||
f331c029 TH |
183 | static inline int disk_max_parts(struct gendisk *disk) |
184 | { | |
689d6fac TH |
185 | if (disk->flags & GENHD_FL_EXT_DEVT) |
186 | return DISK_MAX_PARTS; | |
187 | return disk->minors; | |
b5d0b9df TH |
188 | } |
189 | ||
190 | static inline bool disk_partitionable(struct gendisk *disk) | |
191 | { | |
192 | return disk_max_parts(disk) > 1; | |
f331c029 TH |
193 | } |
194 | ||
195 | static inline dev_t disk_devt(struct gendisk *disk) | |
196 | { | |
ed9e1982 | 197 | return disk_to_dev(disk)->devt; |
f331c029 TH |
198 | } |
199 | ||
200 | static inline dev_t part_devt(struct hd_struct *part) | |
201 | { | |
ed9e1982 | 202 | return part_to_dev(part)->devt; |
f331c029 TH |
203 | } |
204 | ||
e71bf0d0 TH |
205 | extern struct hd_struct *disk_get_part(struct gendisk *disk, int partno); |
206 | ||
207 | static inline void disk_put_part(struct hd_struct *part) | |
208 | { | |
209 | if (likely(part)) | |
ed9e1982 | 210 | put_device(part_to_dev(part)); |
e71bf0d0 TH |
211 | } |
212 | ||
213 | /* | |
214 | * Smarter partition iterator without context limits. | |
215 | */ | |
216 | #define DISK_PITER_REVERSE (1 << 0) /* iterate in the reverse direction */ | |
217 | #define DISK_PITER_INCL_EMPTY (1 << 1) /* include 0-sized parts */ | |
b5d0b9df | 218 | #define DISK_PITER_INCL_PART0 (1 << 2) /* include partition 0 */ |
71982a40 | 219 | #define DISK_PITER_INCL_EMPTY_PART0 (1 << 3) /* include empty partition 0 */ |
e71bf0d0 TH |
220 | |
221 | struct disk_part_iter { | |
222 | struct gendisk *disk; | |
223 | struct hd_struct *part; | |
224 | int idx; | |
225 | unsigned int flags; | |
226 | }; | |
227 | ||
228 | extern void disk_part_iter_init(struct disk_part_iter *piter, | |
229 | struct gendisk *disk, unsigned int flags); | |
230 | extern struct hd_struct *disk_part_iter_next(struct disk_part_iter *piter); | |
231 | extern void disk_part_iter_exit(struct disk_part_iter *piter); | |
232 | ||
233 | extern struct hd_struct *disk_map_sector_rcu(struct gendisk *disk, | |
234 | sector_t sector); | |
235 | ||
c9959059 | 236 | /* |
1da177e4 LT |
237 | * Macros to operate on percpu disk statistics: |
238 | * | |
c9959059 TH |
239 | * {disk|part|all}_stat_{add|sub|inc|dec}() modify the stat counters |
240 | * and should be called between disk_stat_lock() and | |
241 | * disk_stat_unlock(). | |
242 | * | |
243 | * part_stat_read() can be called at any time. | |
244 | * | |
245 | * part_stat_{add|set_all}() and {init|free}_part_stats are for | |
246 | * internal use only. | |
1da177e4 LT |
247 | */ |
248 | #ifdef CONFIG_SMP | |
074a7aca TH |
249 | #define part_stat_lock() ({ rcu_read_lock(); get_cpu(); }) |
250 | #define part_stat_unlock() do { put_cpu(); rcu_read_unlock(); } while (0) | |
ea5c48ab | 251 | |
074a7aca TH |
252 | #define __part_stat_add(cpu, part, field, addnd) \ |
253 | (per_cpu_ptr((part)->dkstats, (cpu))->field += (addnd)) | |
ea5c48ab JM |
254 | |
255 | #define part_stat_read(part, field) \ | |
256 | ({ \ | |
074a7aca | 257 | typeof((part)->dkstats->field) res = 0; \ |
ea5c48ab JM |
258 | int i; \ |
259 | for_each_possible_cpu(i) \ | |
074a7aca | 260 | res += per_cpu_ptr((part)->dkstats, i)->field; \ |
ea5c48ab JM |
261 | res; \ |
262 | }) | |
263 | ||
28f13702 JA |
264 | static inline void part_stat_set_all(struct hd_struct *part, int value) |
265 | { | |
ea5c48ab | 266 | int i; |
28f13702 | 267 | |
ea5c48ab JM |
268 | for_each_possible_cpu(i) |
269 | memset(per_cpu_ptr(part->dkstats, i), value, | |
28f13702 | 270 | sizeof(struct disk_stats)); |
ea5c48ab | 271 | } |
c9959059 | 272 | |
074a7aca | 273 | static inline int init_part_stats(struct hd_struct *part) |
ea5c48ab | 274 | { |
074a7aca TH |
275 | part->dkstats = alloc_percpu(struct disk_stats); |
276 | if (!part->dkstats) | |
277 | return 0; | |
278 | return 1; | |
1da177e4 | 279 | } |
ea5c48ab | 280 | |
074a7aca | 281 | static inline void free_part_stats(struct hd_struct *part) |
ea5c48ab | 282 | { |
074a7aca | 283 | free_percpu(part->dkstats); |
ea5c48ab JM |
284 | } |
285 | ||
074a7aca TH |
286 | #else /* !CONFIG_SMP */ |
287 | #define part_stat_lock() ({ rcu_read_lock(); 0; }) | |
288 | #define part_stat_unlock() rcu_read_unlock() | |
c9959059 | 289 | |
074a7aca TH |
290 | #define __part_stat_add(cpu, part, field, addnd) \ |
291 | ((part)->dkstats.field += addnd) | |
1da177e4 | 292 | |
074a7aca | 293 | #define part_stat_read(part, field) ((part)->dkstats.field) |
1da177e4 | 294 | |
074a7aca | 295 | static inline void part_stat_set_all(struct hd_struct *part, int value) |
1da177e4 | 296 | { |
074a7aca | 297 | memset(&part->dkstats, value, sizeof(struct disk_stats)); |
1da177e4 | 298 | } |
ea5c48ab JM |
299 | |
300 | static inline int init_part_stats(struct hd_struct *part) | |
301 | { | |
ea5c48ab JM |
302 | return 1; |
303 | } | |
304 | ||
305 | static inline void free_part_stats(struct hd_struct *part) | |
306 | { | |
ea5c48ab JM |
307 | } |
308 | ||
074a7aca | 309 | #endif /* CONFIG_SMP */ |
1da177e4 | 310 | |
074a7aca TH |
311 | #define part_stat_add(cpu, part, field, addnd) do { \ |
312 | __part_stat_add((cpu), (part), field, addnd); \ | |
313 | if ((part)->partno) \ | |
314 | __part_stat_add((cpu), &part_to_disk((part))->part0, \ | |
315 | field, addnd); \ | |
316 | } while (0) | |
ea5c48ab | 317 | |
074a7aca TH |
318 | #define part_stat_dec(cpu, gendiskp, field) \ |
319 | part_stat_add(cpu, gendiskp, field, -1) | |
320 | #define part_stat_inc(cpu, gendiskp, field) \ | |
321 | part_stat_add(cpu, gendiskp, field, 1) | |
322 | #define part_stat_sub(cpu, gendiskp, field, subnd) \ | |
323 | part_stat_add(cpu, gendiskp, field, -subnd) | |
324 | ||
0f78ab98 | 325 | static inline void part_inc_in_flight(struct hd_struct *part) |
ea5c48ab | 326 | { |
0f78ab98 | 327 | part->in_flight++; |
074a7aca | 328 | if (part->partno) |
0f78ab98 | 329 | part_to_disk(part)->part0.in_flight++; |
ea5c48ab JM |
330 | } |
331 | ||
0f78ab98 | 332 | static inline void part_dec_in_flight(struct hd_struct *part) |
ea5c48ab | 333 | { |
0f78ab98 | 334 | part->in_flight--; |
074a7aca | 335 | if (part->partno) |
0f78ab98 | 336 | part_to_disk(part)->part0.in_flight--; |
ea5c48ab | 337 | } |
1da177e4 | 338 | |
d3992286 | 339 | /* block/blk-core.c */ |
c9959059 | 340 | extern void part_round_stats(int cpu, struct hd_struct *part); |
1da177e4 | 341 | |
32ca163c | 342 | /* block/genhd.c */ |
1da177e4 LT |
343 | extern void add_disk(struct gendisk *disk); |
344 | extern void del_gendisk(struct gendisk *gp); | |
345 | extern void unlink_gendisk(struct gendisk *gp); | |
cf771cb5 | 346 | extern struct gendisk *get_gendisk(dev_t dev, int *partno); |
f331c029 | 347 | extern struct block_device *bdget_disk(struct gendisk *disk, int partno); |
1da177e4 LT |
348 | |
349 | extern void set_device_ro(struct block_device *bdev, int flag); | |
350 | extern void set_disk_ro(struct gendisk *disk, int flag); | |
351 | ||
b7db9956 TH |
352 | static inline int get_disk_ro(struct gendisk *disk) |
353 | { | |
354 | return disk->part0.policy; | |
355 | } | |
356 | ||
1da177e4 LT |
357 | /* drivers/char/random.c */ |
358 | extern void add_disk_randomness(struct gendisk *disk); | |
359 | extern void rand_initialize_disk(struct gendisk *disk); | |
360 | ||
361 | static inline sector_t get_start_sect(struct block_device *bdev) | |
362 | { | |
0762b8bd | 363 | return bdev->bd_part->start_sect; |
1da177e4 LT |
364 | } |
365 | static inline sector_t get_capacity(struct gendisk *disk) | |
366 | { | |
80795aef | 367 | return disk->part0.nr_sects; |
1da177e4 LT |
368 | } |
369 | static inline void set_capacity(struct gendisk *disk, sector_t size) | |
370 | { | |
80795aef | 371 | disk->part0.nr_sects = size; |
1da177e4 LT |
372 | } |
373 | ||
1da177e4 LT |
374 | #ifdef CONFIG_SOLARIS_X86_PARTITION |
375 | ||
b84d8796 | 376 | #define SOLARIS_X86_NUMSLICE 16 |
1da177e4 LT |
377 | #define SOLARIS_X86_VTOC_SANE (0x600DDEEEUL) |
378 | ||
379 | struct solaris_x86_slice { | |
380 | __le16 s_tag; /* ID tag of partition */ | |
381 | __le16 s_flag; /* permission flags */ | |
382 | __le32 s_start; /* start sector no of partition */ | |
383 | __le32 s_size; /* # of blocks in partition */ | |
384 | }; | |
385 | ||
386 | struct solaris_x86_vtoc { | |
387 | unsigned int v_bootinfo[3]; /* info needed by mboot (unsupported) */ | |
388 | __le32 v_sanity; /* to verify vtoc sanity */ | |
389 | __le32 v_version; /* layout version */ | |
390 | char v_volume[8]; /* volume name */ | |
391 | __le16 v_sectorsz; /* sector size in bytes */ | |
392 | __le16 v_nparts; /* number of partitions */ | |
393 | unsigned int v_reserved[10]; /* free space */ | |
394 | struct solaris_x86_slice | |
395 | v_slice[SOLARIS_X86_NUMSLICE]; /* slice headers */ | |
396 | unsigned int timestamp[SOLARIS_X86_NUMSLICE]; /* timestamp (unsupported) */ | |
397 | char v_asciilabel[128]; /* for compatibility */ | |
398 | }; | |
399 | ||
400 | #endif /* CONFIG_SOLARIS_X86_PARTITION */ | |
401 | ||
402 | #ifdef CONFIG_BSD_DISKLABEL | |
403 | /* | |
404 | * BSD disklabel support by Yossi Gottlieb <yogo@math.tau.ac.il> | |
405 | * updated by Marc Espie <Marc.Espie@openbsd.org> | |
406 | */ | |
407 | ||
408 | /* check against BSD src/sys/sys/disklabel.h for consistency */ | |
409 | ||
410 | #define BSD_DISKMAGIC (0x82564557UL) /* The disk magic number */ | |
411 | #define BSD_MAXPARTITIONS 16 | |
412 | #define OPENBSD_MAXPARTITIONS 16 | |
413 | #define BSD_FS_UNUSED 0 /* disklabel unused partition entry ID */ | |
414 | struct bsd_disklabel { | |
415 | __le32 d_magic; /* the magic number */ | |
416 | __s16 d_type; /* drive type */ | |
417 | __s16 d_subtype; /* controller/d_type specific */ | |
418 | char d_typename[16]; /* type name, e.g. "eagle" */ | |
419 | char d_packname[16]; /* pack identifier */ | |
420 | __u32 d_secsize; /* # of bytes per sector */ | |
421 | __u32 d_nsectors; /* # of data sectors per track */ | |
422 | __u32 d_ntracks; /* # of tracks per cylinder */ | |
423 | __u32 d_ncylinders; /* # of data cylinders per unit */ | |
424 | __u32 d_secpercyl; /* # of data sectors per cylinder */ | |
425 | __u32 d_secperunit; /* # of data sectors per unit */ | |
426 | __u16 d_sparespertrack; /* # of spare sectors per track */ | |
427 | __u16 d_sparespercyl; /* # of spare sectors per cylinder */ | |
428 | __u32 d_acylinders; /* # of alt. cylinders per unit */ | |
429 | __u16 d_rpm; /* rotational speed */ | |
430 | __u16 d_interleave; /* hardware sector interleave */ | |
431 | __u16 d_trackskew; /* sector 0 skew, per track */ | |
432 | __u16 d_cylskew; /* sector 0 skew, per cylinder */ | |
433 | __u32 d_headswitch; /* head switch time, usec */ | |
434 | __u32 d_trkseek; /* track-to-track seek, usec */ | |
435 | __u32 d_flags; /* generic flags */ | |
436 | #define NDDATA 5 | |
437 | __u32 d_drivedata[NDDATA]; /* drive-type specific information */ | |
438 | #define NSPARE 5 | |
439 | __u32 d_spare[NSPARE]; /* reserved for future use */ | |
440 | __le32 d_magic2; /* the magic number (again) */ | |
441 | __le16 d_checksum; /* xor of data incl. partitions */ | |
442 | ||
443 | /* filesystem and partition information: */ | |
444 | __le16 d_npartitions; /* number of partitions in following */ | |
445 | __le32 d_bbsize; /* size of boot area at sn0, bytes */ | |
446 | __le32 d_sbsize; /* max size of fs superblock, bytes */ | |
447 | struct bsd_partition { /* the partition table */ | |
448 | __le32 p_size; /* number of sectors in partition */ | |
449 | __le32 p_offset; /* starting sector */ | |
450 | __le32 p_fsize; /* filesystem basic fragment size */ | |
451 | __u8 p_fstype; /* filesystem type, see below */ | |
452 | __u8 p_frag; /* filesystem fragments per block */ | |
453 | __le16 p_cpg; /* filesystem cylinders per group */ | |
454 | } d_partitions[BSD_MAXPARTITIONS]; /* actually may be more */ | |
455 | }; | |
456 | ||
457 | #endif /* CONFIG_BSD_DISKLABEL */ | |
458 | ||
459 | #ifdef CONFIG_UNIXWARE_DISKLABEL | |
460 | /* | |
461 | * Unixware slices support by Andrzej Krzysztofowicz <ankry@mif.pg.gda.pl> | |
462 | * and Krzysztof G. Baranowski <kgb@knm.org.pl> | |
463 | */ | |
464 | ||
465 | #define UNIXWARE_DISKMAGIC (0xCA5E600DUL) /* The disk magic number */ | |
466 | #define UNIXWARE_DISKMAGIC2 (0x600DDEEEUL) /* The slice table magic nr */ | |
467 | #define UNIXWARE_NUMSLICE 16 | |
468 | #define UNIXWARE_FS_UNUSED 0 /* Unused slice entry ID */ | |
469 | ||
470 | struct unixware_slice { | |
471 | __le16 s_label; /* label */ | |
472 | __le16 s_flags; /* permission flags */ | |
473 | __le32 start_sect; /* starting sector */ | |
474 | __le32 nr_sects; /* number of sectors in slice */ | |
475 | }; | |
476 | ||
477 | struct unixware_disklabel { | |
478 | __le32 d_type; /* drive type */ | |
479 | __le32 d_magic; /* the magic number */ | |
480 | __le32 d_version; /* version number */ | |
481 | char d_serial[12]; /* serial number of the device */ | |
482 | __le32 d_ncylinders; /* # of data cylinders per device */ | |
483 | __le32 d_ntracks; /* # of tracks per cylinder */ | |
484 | __le32 d_nsectors; /* # of data sectors per track */ | |
485 | __le32 d_secsize; /* # of bytes per sector */ | |
486 | __le32 d_part_start; /* # of first sector of this partition */ | |
487 | __le32 d_unknown1[12]; /* ? */ | |
488 | __le32 d_alt_tbl; /* byte offset of alternate table */ | |
489 | __le32 d_alt_len; /* byte length of alternate table */ | |
490 | __le32 d_phys_cyl; /* # of physical cylinders per device */ | |
491 | __le32 d_phys_trk; /* # of physical tracks per cylinder */ | |
492 | __le32 d_phys_sec; /* # of physical sectors per track */ | |
493 | __le32 d_phys_bytes; /* # of physical bytes per sector */ | |
494 | __le32 d_unknown2; /* ? */ | |
495 | __le32 d_unknown3; /* ? */ | |
496 | __le32 d_pad[8]; /* pad */ | |
497 | ||
498 | struct unixware_vtoc { | |
499 | __le32 v_magic; /* the magic number */ | |
500 | __le32 v_version; /* version number */ | |
501 | char v_name[8]; /* volume name */ | |
502 | __le16 v_nslices; /* # of slices */ | |
503 | __le16 v_unknown1; /* ? */ | |
504 | __le32 v_reserved[10]; /* reserved */ | |
505 | struct unixware_slice | |
506 | v_slice[UNIXWARE_NUMSLICE]; /* slice headers */ | |
507 | } vtoc; | |
508 | ||
509 | }; /* 408 */ | |
510 | ||
511 | #endif /* CONFIG_UNIXWARE_DISKLABEL */ | |
512 | ||
513 | #ifdef CONFIG_MINIX_SUBPARTITION | |
514 | # define MINIX_NR_SUBPARTITIONS 4 | |
515 | #endif /* CONFIG_MINIX_SUBPARTITION */ | |
516 | ||
d18d7682 FMDN |
517 | #define ADDPART_FLAG_NONE 0 |
518 | #define ADDPART_FLAG_RAID 1 | |
519 | #define ADDPART_FLAG_WHOLEDISK 2 | |
520 | ||
bcce3de1 TH |
521 | extern int blk_alloc_devt(struct hd_struct *part, dev_t *devt); |
522 | extern void blk_free_devt(dev_t devt); | |
cf771cb5 TH |
523 | extern dev_t blk_lookup_devt(const char *name, int partno); |
524 | extern char *disk_name (struct gendisk *hd, int partno, char *buf); | |
1da177e4 | 525 | |
540eed56 | 526 | extern int disk_expand_part_tbl(struct gendisk *disk, int target); |
1da177e4 | 527 | extern int rescan_partitions(struct gendisk *disk, struct block_device *bdev); |
ba32929a TH |
528 | extern struct hd_struct * __must_check add_partition(struct gendisk *disk, |
529 | int partno, sector_t start, | |
530 | sector_t len, int flags); | |
1da177e4 | 531 | extern void delete_partition(struct gendisk *, int); |
dd2a345f | 532 | extern void printk_all_partitions(void); |
1da177e4 | 533 | |
1946089a | 534 | extern struct gendisk *alloc_disk_node(int minors, int node_id); |
1da177e4 LT |
535 | extern struct gendisk *alloc_disk(int minors); |
536 | extern struct kobject *get_disk(struct gendisk *disk); | |
537 | extern void put_disk(struct gendisk *disk); | |
edfaa7c3 | 538 | extern void blk_register_region(dev_t devt, unsigned long range, |
1da177e4 LT |
539 | struct module *module, |
540 | struct kobject *(*probe)(dev_t, int *, void *), | |
541 | int (*lock)(dev_t, void *), | |
542 | void *data); | |
edfaa7c3 | 543 | extern void blk_unregister_region(dev_t devt, unsigned long range); |
1da177e4 | 544 | |
e5610521 TH |
545 | extern ssize_t part_size_show(struct device *dev, |
546 | struct device_attribute *attr, char *buf); | |
074a7aca TH |
547 | extern ssize_t part_stat_show(struct device *dev, |
548 | struct device_attribute *attr, char *buf); | |
eddb2e26 TH |
549 | #ifdef CONFIG_FAIL_MAKE_REQUEST |
550 | extern ssize_t part_fail_show(struct device *dev, | |
551 | struct device_attribute *attr, char *buf); | |
552 | extern ssize_t part_fail_store(struct device *dev, | |
553 | struct device_attribute *attr, | |
554 | const char *buf, size_t count); | |
555 | #endif /* CONFIG_FAIL_MAKE_REQUEST */ | |
e5610521 | 556 | |
87c1efbf JA |
557 | #else /* CONFIG_BLOCK */ |
558 | ||
559 | static inline void printk_all_partitions(void) { } | |
560 | ||
cf771cb5 | 561 | static inline dev_t blk_lookup_devt(const char *name, int partno) |
edfaa7c3 KS |
562 | { |
563 | dev_t devt = MKDEV(0, 0); | |
564 | return devt; | |
565 | } | |
566 | ||
87c1efbf | 567 | #endif /* CONFIG_BLOCK */ |
9361401e | 568 | |
a8ae50ba | 569 | #endif /* _LINUX_GENHD_H */ |