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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> |
1da177e4 | 14 | |
9361401e DH |
15 | #ifdef CONFIG_BLOCK |
16 | ||
edfaa7c3 KS |
17 | #define kobj_to_dev(k) container_of(k, struct device, kobj) |
18 | #define dev_to_disk(device) container_of(device, struct gendisk, dev) | |
19 | #define dev_to_part(device) container_of(device, struct hd_struct, dev) | |
20 | ||
edfaa7c3 KS |
21 | extern struct device_type part_type; |
22 | extern struct kobject *block_depr; | |
23 | extern struct class block_class; | |
24 | ||
a0db701a AB |
25 | extern const struct seq_operations partitions_op; |
26 | extern const struct seq_operations diskstats_op; | |
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 | ||
34186efc DW |
58 | #include <linux/major.h> |
59 | #include <linux/device.h> | |
60 | #include <linux/smp.h> | |
61 | #include <linux/string.h> | |
62 | #include <linux/fs.h> | |
8ce7ad7b | 63 | #include <linux/workqueue.h> |
34186efc | 64 | |
1da177e4 LT |
65 | struct partition { |
66 | unsigned char boot_ind; /* 0x80 - active */ | |
67 | unsigned char head; /* starting head */ | |
68 | unsigned char sector; /* starting sector */ | |
69 | unsigned char cyl; /* starting cylinder */ | |
70 | unsigned char sys_ind; /* What partition type */ | |
71 | unsigned char end_head; /* end head */ | |
72 | unsigned char end_sector; /* end sector */ | |
73 | unsigned char end_cyl; /* end cylinder */ | |
74 | __le32 start_sect; /* starting sector counting from 0 */ | |
75 | __le32 nr_sects; /* nr of sectors in partition */ | |
76 | } __attribute__((packed)); | |
77 | ||
ea5c48ab JM |
78 | struct disk_stats { |
79 | unsigned long sectors[2]; /* READs and WRITEs */ | |
80 | unsigned long ios[2]; | |
81 | unsigned long merges[2]; | |
82 | unsigned long ticks[2]; | |
83 | unsigned long io_ticks; | |
84 | unsigned long time_in_queue; | |
85 | }; | |
86 | ||
1da177e4 LT |
87 | struct hd_struct { |
88 | sector_t start_sect; | |
89 | sector_t nr_sects; | |
edfaa7c3 | 90 | struct device dev; |
6a4d44c1 | 91 | struct kobject *holder_dir; |
1da177e4 | 92 | int policy, partno; |
c17bb495 AM |
93 | #ifdef CONFIG_FAIL_MAKE_REQUEST |
94 | int make_it_fail; | |
ea5c48ab JM |
95 | #endif |
96 | unsigned long stamp; | |
97 | int in_flight; | |
98 | #ifdef CONFIG_SMP | |
99 | struct disk_stats *dkstats; | |
100 | #else | |
101 | struct disk_stats dkstats; | |
c17bb495 | 102 | #endif |
1da177e4 LT |
103 | }; |
104 | ||
105 | #define GENHD_FL_REMOVABLE 1 | |
106 | #define GENHD_FL_DRIVERFS 2 | |
86ce18d7 | 107 | #define GENHD_FL_MEDIA_CHANGE_NOTIFY 4 |
1da177e4 LT |
108 | #define GENHD_FL_CD 8 |
109 | #define GENHD_FL_UP 16 | |
110 | #define GENHD_FL_SUPPRESS_PARTITION_INFO 32 | |
c17bb495 | 111 | #define GENHD_FL_FAIL 64 |
1da177e4 | 112 | |
1da177e4 LT |
113 | struct gendisk { |
114 | int major; /* major number of driver */ | |
115 | int first_minor; | |
116 | int minors; /* maximum number of minors, =1 for | |
117 | * disks that can't be partitioned. */ | |
118 | char disk_name[32]; /* name of major driver */ | |
119 | struct hd_struct **part; /* [indexed by minor] */ | |
120 | struct block_device_operations *fops; | |
121 | struct request_queue *queue; | |
122 | void *private_data; | |
123 | sector_t capacity; | |
124 | ||
125 | int flags; | |
edfaa7c3 KS |
126 | struct device *driverfs_dev; // FIXME: remove |
127 | struct device dev; | |
6a4d44c1 JN |
128 | struct kobject *holder_dir; |
129 | struct kobject *slave_dir; | |
1da177e4 LT |
130 | |
131 | struct timer_rand_state *random; | |
132 | int policy; | |
133 | ||
134 | atomic_t sync_io; /* RAID */ | |
20e5c81f | 135 | unsigned long stamp; |
1da177e4 LT |
136 | int in_flight; |
137 | #ifdef CONFIG_SMP | |
138 | struct disk_stats *dkstats; | |
139 | #else | |
140 | struct disk_stats dkstats; | |
141 | #endif | |
8ce7ad7b | 142 | struct work_struct async_notify; |
7ba1ba12 MP |
143 | #ifdef CONFIG_BLK_DEV_INTEGRITY |
144 | struct blk_integrity *integrity; | |
145 | #endif | |
1da177e4 LT |
146 | }; |
147 | ||
1da177e4 LT |
148 | /* |
149 | * Macros to operate on percpu disk statistics: | |
150 | * | |
151 | * The __ variants should only be called in critical sections. The full | |
152 | * variants disable/enable preemption. | |
153 | */ | |
ea5c48ab JM |
154 | static inline struct hd_struct *get_part(struct gendisk *gendiskp, |
155 | sector_t sector) | |
156 | { | |
157 | struct hd_struct *part; | |
158 | int i; | |
159 | for (i = 0; i < gendiskp->minors - 1; i++) { | |
160 | part = gendiskp->part[i]; | |
161 | if (part && part->start_sect <= sector | |
162 | && sector < part->start_sect + part->nr_sects) | |
163 | return part; | |
164 | } | |
165 | return NULL; | |
166 | } | |
167 | ||
1da177e4 LT |
168 | #ifdef CONFIG_SMP |
169 | #define __disk_stat_add(gendiskp, field, addnd) \ | |
170 | (per_cpu_ptr(gendiskp->dkstats, smp_processor_id())->field += addnd) | |
171 | ||
172 | #define disk_stat_read(gendiskp, field) \ | |
173 | ({ \ | |
174 | typeof(gendiskp->dkstats->field) res = 0; \ | |
175 | int i; \ | |
0a945022 | 176 | for_each_possible_cpu(i) \ |
1da177e4 | 177 | res += per_cpu_ptr(gendiskp->dkstats, i)->field; \ |
1da177e4 LT |
178 | res; \ |
179 | }) | |
180 | ||
181 | static inline void disk_stat_set_all(struct gendisk *gendiskp, int value) { | |
182 | int i; | |
28f13702 | 183 | |
0a945022 | 184 | for_each_possible_cpu(i) |
394e3902 | 185 | memset(per_cpu_ptr(gendiskp->dkstats, i), value, |
28f13702 | 186 | sizeof(struct disk_stats)); |
1da177e4 | 187 | } |
ea5c48ab JM |
188 | |
189 | #define __part_stat_add(part, field, addnd) \ | |
190 | (per_cpu_ptr(part->dkstats, smp_processor_id())->field += addnd) | |
191 | ||
28f13702 | 192 | #define __all_stat_add(gendiskp, part, field, addnd, sector) \ |
ea5c48ab | 193 | ({ \ |
ea5c48ab JM |
194 | if (part) \ |
195 | __part_stat_add(part, field, addnd); \ | |
196 | __disk_stat_add(gendiskp, field, addnd); \ | |
197 | }) | |
198 | ||
199 | #define part_stat_read(part, field) \ | |
200 | ({ \ | |
201 | typeof(part->dkstats->field) res = 0; \ | |
202 | int i; \ | |
203 | for_each_possible_cpu(i) \ | |
204 | res += per_cpu_ptr(part->dkstats, i)->field; \ | |
205 | res; \ | |
206 | }) | |
207 | ||
28f13702 JA |
208 | static inline void part_stat_set_all(struct hd_struct *part, int value) |
209 | { | |
ea5c48ab | 210 | int i; |
28f13702 | 211 | |
ea5c48ab JM |
212 | for_each_possible_cpu(i) |
213 | memset(per_cpu_ptr(part->dkstats, i), value, | |
28f13702 | 214 | sizeof(struct disk_stats)); |
ea5c48ab | 215 | } |
1da177e4 | 216 | |
a8ae50ba | 217 | #else /* !CONFIG_SMP */ |
1da177e4 LT |
218 | #define __disk_stat_add(gendiskp, field, addnd) \ |
219 | (gendiskp->dkstats.field += addnd) | |
220 | #define disk_stat_read(gendiskp, field) (gendiskp->dkstats.field) | |
221 | ||
ea5c48ab JM |
222 | static inline void disk_stat_set_all(struct gendisk *gendiskp, int value) |
223 | { | |
1da177e4 LT |
224 | memset(&gendiskp->dkstats, value, sizeof (struct disk_stats)); |
225 | } | |
ea5c48ab JM |
226 | |
227 | #define __part_stat_add(part, field, addnd) \ | |
228 | (part->dkstats.field += addnd) | |
229 | ||
28f13702 | 230 | #define __all_stat_add(gendiskp, part, field, addnd, sector) \ |
ea5c48ab | 231 | ({ \ |
ea5c48ab JM |
232 | if (part) \ |
233 | part->dkstats.field += addnd; \ | |
234 | __disk_stat_add(gendiskp, field, addnd); \ | |
235 | }) | |
236 | ||
237 | #define part_stat_read(part, field) (part->dkstats.field) | |
238 | ||
239 | static inline void part_stat_set_all(struct hd_struct *part, int value) | |
240 | { | |
241 | memset(&part->dkstats, value, sizeof(struct disk_stats)); | |
242 | } | |
243 | ||
a8ae50ba | 244 | #endif /* CONFIG_SMP */ |
1da177e4 LT |
245 | |
246 | #define disk_stat_add(gendiskp, field, addnd) \ | |
247 | do { \ | |
248 | preempt_disable(); \ | |
249 | __disk_stat_add(gendiskp, field, addnd); \ | |
250 | preempt_enable(); \ | |
251 | } while (0) | |
252 | ||
253 | #define __disk_stat_dec(gendiskp, field) __disk_stat_add(gendiskp, field, -1) | |
254 | #define disk_stat_dec(gendiskp, field) disk_stat_add(gendiskp, field, -1) | |
255 | ||
256 | #define __disk_stat_inc(gendiskp, field) __disk_stat_add(gendiskp, field, 1) | |
257 | #define disk_stat_inc(gendiskp, field) disk_stat_add(gendiskp, field, 1) | |
258 | ||
259 | #define __disk_stat_sub(gendiskp, field, subnd) \ | |
260 | __disk_stat_add(gendiskp, field, -subnd) | |
261 | #define disk_stat_sub(gendiskp, field, subnd) \ | |
262 | disk_stat_add(gendiskp, field, -subnd) | |
263 | ||
ea5c48ab JM |
264 | #define part_stat_add(gendiskp, field, addnd) \ |
265 | do { \ | |
266 | preempt_disable(); \ | |
267 | __part_stat_add(gendiskp, field, addnd);\ | |
268 | preempt_enable(); \ | |
269 | } while (0) | |
270 | ||
271 | #define __part_stat_dec(gendiskp, field) __part_stat_add(gendiskp, field, -1) | |
272 | #define part_stat_dec(gendiskp, field) part_stat_add(gendiskp, field, -1) | |
273 | ||
274 | #define __part_stat_inc(gendiskp, field) __part_stat_add(gendiskp, field, 1) | |
275 | #define part_stat_inc(gendiskp, field) part_stat_add(gendiskp, field, 1) | |
276 | ||
277 | #define __part_stat_sub(gendiskp, field, subnd) \ | |
278 | __part_stat_add(gendiskp, field, -subnd) | |
279 | #define part_stat_sub(gendiskp, field, subnd) \ | |
280 | part_stat_add(gendiskp, field, -subnd) | |
281 | ||
28f13702 | 282 | #define all_stat_add(gendiskp, part, field, addnd, sector) \ |
ea5c48ab JM |
283 | do { \ |
284 | preempt_disable(); \ | |
28f13702 | 285 | __all_stat_add(gendiskp, part, field, addnd, sector); \ |
ea5c48ab JM |
286 | preempt_enable(); \ |
287 | } while (0) | |
288 | ||
289 | #define __all_stat_dec(gendiskp, field, sector) \ | |
290 | __all_stat_add(gendiskp, field, -1, sector) | |
291 | #define all_stat_dec(gendiskp, field, sector) \ | |
292 | all_stat_add(gendiskp, field, -1, sector) | |
293 | ||
28f13702 JA |
294 | #define __all_stat_inc(gendiskp, part, field, sector) \ |
295 | __all_stat_add(gendiskp, part, field, 1, sector) | |
296 | #define all_stat_inc(gendiskp, part, field, sector) \ | |
297 | all_stat_add(gendiskp, part, field, 1, sector) | |
ea5c48ab | 298 | |
28f13702 JA |
299 | #define __all_stat_sub(gendiskp, part, field, subnd, sector) \ |
300 | __all_stat_add(gendiskp, part, field, -subnd, sector) | |
301 | #define all_stat_sub(gendiskp, part, field, subnd, sector) \ | |
302 | all_stat_add(gendiskp, part, field, -subnd, sector) | |
1da177e4 LT |
303 | |
304 | /* Inlines to alloc and free disk stats in struct gendisk */ | |
305 | #ifdef CONFIG_SMP | |
306 | static inline int init_disk_stats(struct gendisk *disk) | |
307 | { | |
308 | disk->dkstats = alloc_percpu(struct disk_stats); | |
309 | if (!disk->dkstats) | |
310 | return 0; | |
311 | return 1; | |
312 | } | |
313 | ||
314 | static inline void free_disk_stats(struct gendisk *disk) | |
315 | { | |
316 | free_percpu(disk->dkstats); | |
317 | } | |
ea5c48ab JM |
318 | |
319 | static inline int init_part_stats(struct hd_struct *part) | |
320 | { | |
321 | part->dkstats = alloc_percpu(struct disk_stats); | |
322 | if (!part->dkstats) | |
323 | return 0; | |
324 | return 1; | |
325 | } | |
326 | ||
327 | static inline void free_part_stats(struct hd_struct *part) | |
328 | { | |
329 | free_percpu(part->dkstats); | |
330 | } | |
331 | ||
1da177e4 LT |
332 | #else /* CONFIG_SMP */ |
333 | static inline int init_disk_stats(struct gendisk *disk) | |
334 | { | |
335 | return 1; | |
336 | } | |
337 | ||
338 | static inline void free_disk_stats(struct gendisk *disk) | |
339 | { | |
340 | } | |
ea5c48ab JM |
341 | |
342 | static inline int init_part_stats(struct hd_struct *part) | |
343 | { | |
344 | return 1; | |
345 | } | |
346 | ||
347 | static inline void free_part_stats(struct hd_struct *part) | |
348 | { | |
349 | } | |
1da177e4 LT |
350 | #endif /* CONFIG_SMP */ |
351 | ||
352 | /* drivers/block/ll_rw_blk.c */ | |
353 | extern void disk_round_stats(struct gendisk *disk); | |
6f2576af | 354 | extern void part_round_stats(struct hd_struct *part); |
1da177e4 LT |
355 | |
356 | /* drivers/block/genhd.c */ | |
ac20427e | 357 | extern int get_blkdev_list(char *, int); |
1da177e4 LT |
358 | extern void add_disk(struct gendisk *disk); |
359 | extern void del_gendisk(struct gendisk *gp); | |
360 | extern void unlink_gendisk(struct gendisk *gp); | |
361 | extern struct gendisk *get_gendisk(dev_t dev, int *part); | |
362 | ||
363 | extern void set_device_ro(struct block_device *bdev, int flag); | |
364 | extern void set_disk_ro(struct gendisk *disk, int flag); | |
365 | ||
366 | /* drivers/char/random.c */ | |
367 | extern void add_disk_randomness(struct gendisk *disk); | |
368 | extern void rand_initialize_disk(struct gendisk *disk); | |
369 | ||
370 | static inline sector_t get_start_sect(struct block_device *bdev) | |
371 | { | |
372 | return bdev->bd_contains == bdev ? 0 : bdev->bd_part->start_sect; | |
373 | } | |
374 | static inline sector_t get_capacity(struct gendisk *disk) | |
375 | { | |
376 | return disk->capacity; | |
377 | } | |
378 | static inline void set_capacity(struct gendisk *disk, sector_t size) | |
379 | { | |
380 | disk->capacity = size; | |
381 | } | |
382 | ||
1da177e4 LT |
383 | #ifdef CONFIG_SOLARIS_X86_PARTITION |
384 | ||
b84d8796 | 385 | #define SOLARIS_X86_NUMSLICE 16 |
1da177e4 LT |
386 | #define SOLARIS_X86_VTOC_SANE (0x600DDEEEUL) |
387 | ||
388 | struct solaris_x86_slice { | |
389 | __le16 s_tag; /* ID tag of partition */ | |
390 | __le16 s_flag; /* permission flags */ | |
391 | __le32 s_start; /* start sector no of partition */ | |
392 | __le32 s_size; /* # of blocks in partition */ | |
393 | }; | |
394 | ||
395 | struct solaris_x86_vtoc { | |
396 | unsigned int v_bootinfo[3]; /* info needed by mboot (unsupported) */ | |
397 | __le32 v_sanity; /* to verify vtoc sanity */ | |
398 | __le32 v_version; /* layout version */ | |
399 | char v_volume[8]; /* volume name */ | |
400 | __le16 v_sectorsz; /* sector size in bytes */ | |
401 | __le16 v_nparts; /* number of partitions */ | |
402 | unsigned int v_reserved[10]; /* free space */ | |
403 | struct solaris_x86_slice | |
404 | v_slice[SOLARIS_X86_NUMSLICE]; /* slice headers */ | |
405 | unsigned int timestamp[SOLARIS_X86_NUMSLICE]; /* timestamp (unsupported) */ | |
406 | char v_asciilabel[128]; /* for compatibility */ | |
407 | }; | |
408 | ||
409 | #endif /* CONFIG_SOLARIS_X86_PARTITION */ | |
410 | ||
411 | #ifdef CONFIG_BSD_DISKLABEL | |
412 | /* | |
413 | * BSD disklabel support by Yossi Gottlieb <yogo@math.tau.ac.il> | |
414 | * updated by Marc Espie <Marc.Espie@openbsd.org> | |
415 | */ | |
416 | ||
417 | /* check against BSD src/sys/sys/disklabel.h for consistency */ | |
418 | ||
419 | #define BSD_DISKMAGIC (0x82564557UL) /* The disk magic number */ | |
420 | #define BSD_MAXPARTITIONS 16 | |
421 | #define OPENBSD_MAXPARTITIONS 16 | |
422 | #define BSD_FS_UNUSED 0 /* disklabel unused partition entry ID */ | |
423 | struct bsd_disklabel { | |
424 | __le32 d_magic; /* the magic number */ | |
425 | __s16 d_type; /* drive type */ | |
426 | __s16 d_subtype; /* controller/d_type specific */ | |
427 | char d_typename[16]; /* type name, e.g. "eagle" */ | |
428 | char d_packname[16]; /* pack identifier */ | |
429 | __u32 d_secsize; /* # of bytes per sector */ | |
430 | __u32 d_nsectors; /* # of data sectors per track */ | |
431 | __u32 d_ntracks; /* # of tracks per cylinder */ | |
432 | __u32 d_ncylinders; /* # of data cylinders per unit */ | |
433 | __u32 d_secpercyl; /* # of data sectors per cylinder */ | |
434 | __u32 d_secperunit; /* # of data sectors per unit */ | |
435 | __u16 d_sparespertrack; /* # of spare sectors per track */ | |
436 | __u16 d_sparespercyl; /* # of spare sectors per cylinder */ | |
437 | __u32 d_acylinders; /* # of alt. cylinders per unit */ | |
438 | __u16 d_rpm; /* rotational speed */ | |
439 | __u16 d_interleave; /* hardware sector interleave */ | |
440 | __u16 d_trackskew; /* sector 0 skew, per track */ | |
441 | __u16 d_cylskew; /* sector 0 skew, per cylinder */ | |
442 | __u32 d_headswitch; /* head switch time, usec */ | |
443 | __u32 d_trkseek; /* track-to-track seek, usec */ | |
444 | __u32 d_flags; /* generic flags */ | |
445 | #define NDDATA 5 | |
446 | __u32 d_drivedata[NDDATA]; /* drive-type specific information */ | |
447 | #define NSPARE 5 | |
448 | __u32 d_spare[NSPARE]; /* reserved for future use */ | |
449 | __le32 d_magic2; /* the magic number (again) */ | |
450 | __le16 d_checksum; /* xor of data incl. partitions */ | |
451 | ||
452 | /* filesystem and partition information: */ | |
453 | __le16 d_npartitions; /* number of partitions in following */ | |
454 | __le32 d_bbsize; /* size of boot area at sn0, bytes */ | |
455 | __le32 d_sbsize; /* max size of fs superblock, bytes */ | |
456 | struct bsd_partition { /* the partition table */ | |
457 | __le32 p_size; /* number of sectors in partition */ | |
458 | __le32 p_offset; /* starting sector */ | |
459 | __le32 p_fsize; /* filesystem basic fragment size */ | |
460 | __u8 p_fstype; /* filesystem type, see below */ | |
461 | __u8 p_frag; /* filesystem fragments per block */ | |
462 | __le16 p_cpg; /* filesystem cylinders per group */ | |
463 | } d_partitions[BSD_MAXPARTITIONS]; /* actually may be more */ | |
464 | }; | |
465 | ||
466 | #endif /* CONFIG_BSD_DISKLABEL */ | |
467 | ||
468 | #ifdef CONFIG_UNIXWARE_DISKLABEL | |
469 | /* | |
470 | * Unixware slices support by Andrzej Krzysztofowicz <ankry@mif.pg.gda.pl> | |
471 | * and Krzysztof G. Baranowski <kgb@knm.org.pl> | |
472 | */ | |
473 | ||
474 | #define UNIXWARE_DISKMAGIC (0xCA5E600DUL) /* The disk magic number */ | |
475 | #define UNIXWARE_DISKMAGIC2 (0x600DDEEEUL) /* The slice table magic nr */ | |
476 | #define UNIXWARE_NUMSLICE 16 | |
477 | #define UNIXWARE_FS_UNUSED 0 /* Unused slice entry ID */ | |
478 | ||
479 | struct unixware_slice { | |
480 | __le16 s_label; /* label */ | |
481 | __le16 s_flags; /* permission flags */ | |
482 | __le32 start_sect; /* starting sector */ | |
483 | __le32 nr_sects; /* number of sectors in slice */ | |
484 | }; | |
485 | ||
486 | struct unixware_disklabel { | |
487 | __le32 d_type; /* drive type */ | |
488 | __le32 d_magic; /* the magic number */ | |
489 | __le32 d_version; /* version number */ | |
490 | char d_serial[12]; /* serial number of the device */ | |
491 | __le32 d_ncylinders; /* # of data cylinders per device */ | |
492 | __le32 d_ntracks; /* # of tracks per cylinder */ | |
493 | __le32 d_nsectors; /* # of data sectors per track */ | |
494 | __le32 d_secsize; /* # of bytes per sector */ | |
495 | __le32 d_part_start; /* # of first sector of this partition */ | |
496 | __le32 d_unknown1[12]; /* ? */ | |
497 | __le32 d_alt_tbl; /* byte offset of alternate table */ | |
498 | __le32 d_alt_len; /* byte length of alternate table */ | |
499 | __le32 d_phys_cyl; /* # of physical cylinders per device */ | |
500 | __le32 d_phys_trk; /* # of physical tracks per cylinder */ | |
501 | __le32 d_phys_sec; /* # of physical sectors per track */ | |
502 | __le32 d_phys_bytes; /* # of physical bytes per sector */ | |
503 | __le32 d_unknown2; /* ? */ | |
504 | __le32 d_unknown3; /* ? */ | |
505 | __le32 d_pad[8]; /* pad */ | |
506 | ||
507 | struct unixware_vtoc { | |
508 | __le32 v_magic; /* the magic number */ | |
509 | __le32 v_version; /* version number */ | |
510 | char v_name[8]; /* volume name */ | |
511 | __le16 v_nslices; /* # of slices */ | |
512 | __le16 v_unknown1; /* ? */ | |
513 | __le32 v_reserved[10]; /* reserved */ | |
514 | struct unixware_slice | |
515 | v_slice[UNIXWARE_NUMSLICE]; /* slice headers */ | |
516 | } vtoc; | |
517 | ||
518 | }; /* 408 */ | |
519 | ||
520 | #endif /* CONFIG_UNIXWARE_DISKLABEL */ | |
521 | ||
522 | #ifdef CONFIG_MINIX_SUBPARTITION | |
523 | # define MINIX_NR_SUBPARTITIONS 4 | |
524 | #endif /* CONFIG_MINIX_SUBPARTITION */ | |
525 | ||
d18d7682 FMDN |
526 | #define ADDPART_FLAG_NONE 0 |
527 | #define ADDPART_FLAG_RAID 1 | |
528 | #define ADDPART_FLAG_WHOLEDISK 2 | |
529 | ||
30f2f0eb | 530 | extern dev_t blk_lookup_devt(const char *name, int part); |
edfaa7c3 | 531 | extern char *disk_name (struct gendisk *hd, int part, char *buf); |
1da177e4 LT |
532 | |
533 | extern int rescan_partitions(struct gendisk *disk, struct block_device *bdev); | |
d805dda4 | 534 | extern int __must_check add_partition(struct gendisk *, int, sector_t, sector_t, int); |
1da177e4 | 535 | extern void delete_partition(struct gendisk *, int); |
dd2a345f | 536 | extern void printk_all_partitions(void); |
1da177e4 | 537 | |
1946089a | 538 | extern struct gendisk *alloc_disk_node(int minors, int node_id); |
1da177e4 LT |
539 | extern struct gendisk *alloc_disk(int minors); |
540 | extern struct kobject *get_disk(struct gendisk *disk); | |
541 | extern void put_disk(struct gendisk *disk); | |
edfaa7c3 | 542 | extern void blk_register_region(dev_t devt, unsigned long range, |
1da177e4 LT |
543 | struct module *module, |
544 | struct kobject *(*probe)(dev_t, int *, void *), | |
545 | int (*lock)(dev_t, void *), | |
546 | void *data); | |
edfaa7c3 | 547 | extern void blk_unregister_region(dev_t devt, unsigned long range); |
1da177e4 LT |
548 | |
549 | static inline struct block_device *bdget_disk(struct gendisk *disk, int index) | |
550 | { | |
551 | return bdget(MKDEV(disk->major, disk->first_minor) + index); | |
552 | } | |
553 | ||
87c1efbf JA |
554 | #else /* CONFIG_BLOCK */ |
555 | ||
556 | static inline void printk_all_partitions(void) { } | |
557 | ||
30f2f0eb | 558 | static inline dev_t blk_lookup_devt(const char *name, int part) |
edfaa7c3 KS |
559 | { |
560 | dev_t devt = MKDEV(0, 0); | |
561 | return devt; | |
562 | } | |
563 | ||
87c1efbf | 564 | #endif /* CONFIG_BLOCK */ |
9361401e | 565 | |
a8ae50ba | 566 | #endif /* _LINUX_GENHD_H */ |