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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 | ||
12 | #include <linux/types.h> | |
13 | #include <linux/kdev_t.h> | |
14 | #include <linux/rcupdate.h> | |
15 | #include <linux/slab.h> | |
16 | ||
17 | #ifdef CONFIG_BLOCK | |
18 | ||
19 | #define kobj_to_dev(k) container_of((k), struct device, kobj) | |
20 | #define dev_to_disk(device) container_of((device), struct gendisk, part0.__dev) | |
21 | #define dev_to_part(device) container_of((device), struct hd_struct, __dev) | |
22 | #define disk_to_dev(disk) (&(disk)->part0.__dev) | |
23 | #define part_to_dev(part) (&((part)->__dev)) | |
24 | ||
25 | extern struct device_type part_type; | |
26 | extern struct kobject *block_depr; | |
27 | extern struct class block_class; | |
28 | ||
29 | enum { | |
30 | /* These three have identical behaviour; use the second one if DOS FDISK gets | |
31 | confused about extended/logical partitions starting past cylinder 1023. */ | |
32 | DOS_EXTENDED_PARTITION = 5, | |
33 | LINUX_EXTENDED_PARTITION = 0x85, | |
34 | WIN98_EXTENDED_PARTITION = 0x0f, | |
35 | ||
36 | SUN_WHOLE_DISK = DOS_EXTENDED_PARTITION, | |
37 | ||
38 | LINUX_SWAP_PARTITION = 0x82, | |
39 | LINUX_DATA_PARTITION = 0x83, | |
40 | LINUX_LVM_PARTITION = 0x8e, | |
41 | LINUX_RAID_PARTITION = 0xfd, /* autodetect RAID partition */ | |
42 | ||
43 | SOLARIS_X86_PARTITION = LINUX_SWAP_PARTITION, | |
44 | NEW_SOLARIS_X86_PARTITION = 0xbf, | |
45 | ||
46 | DM6_AUX1PARTITION = 0x51, /* no DDO: use xlated geom */ | |
47 | DM6_AUX3PARTITION = 0x53, /* no DDO: use xlated geom */ | |
48 | DM6_PARTITION = 0x54, /* has DDO: use xlated geom & offset */ | |
49 | EZD_PARTITION = 0x55, /* EZ-DRIVE */ | |
50 | ||
51 | FREEBSD_PARTITION = 0xa5, /* FreeBSD Partition ID */ | |
52 | OPENBSD_PARTITION = 0xa6, /* OpenBSD Partition ID */ | |
53 | NETBSD_PARTITION = 0xa9, /* NetBSD Partition ID */ | |
54 | BSDI_PARTITION = 0xb7, /* BSDI Partition ID */ | |
55 | MINIX_PARTITION = 0x81, /* Minix Partition ID */ | |
56 | UNIXWARE_PARTITION = 0x63, /* Same as GNU_HURD and SCO Unix */ | |
57 | }; | |
58 | ||
59 | #define DISK_MAX_PARTS 256 | |
60 | #define DISK_NAME_LEN 32 | |
61 | ||
62 | #include <linux/major.h> | |
63 | #include <linux/device.h> | |
64 | #include <linux/smp.h> | |
65 | #include <linux/string.h> | |
66 | #include <linux/fs.h> | |
67 | #include <linux/workqueue.h> | |
68 | ||
69 | struct partition { | |
70 | unsigned char boot_ind; /* 0x80 - active */ | |
71 | unsigned char head; /* starting head */ | |
72 | unsigned char sector; /* starting sector */ | |
73 | unsigned char cyl; /* starting cylinder */ | |
74 | unsigned char sys_ind; /* What partition type */ | |
75 | unsigned char end_head; /* end head */ | |
76 | unsigned char end_sector; /* end sector */ | |
77 | unsigned char end_cyl; /* end cylinder */ | |
78 | __le32 start_sect; /* starting sector counting from 0 */ | |
79 | __le32 nr_sects; /* nr of sectors in partition */ | |
80 | } __attribute__((packed)); | |
81 | ||
82 | struct disk_stats { | |
83 | unsigned long sectors[2]; /* READs and WRITEs */ | |
84 | unsigned long ios[2]; | |
85 | unsigned long merges[2]; | |
86 | unsigned long ticks[2]; | |
87 | unsigned long io_ticks; | |
88 | unsigned long time_in_queue; | |
89 | }; | |
90 | ||
91 | #define PARTITION_META_INFO_VOLNAMELTH 64 | |
92 | #define PARTITION_META_INFO_UUIDLTH 16 | |
93 | ||
94 | struct partition_meta_info { | |
95 | u8 uuid[PARTITION_META_INFO_UUIDLTH]; /* always big endian */ | |
96 | u8 volname[PARTITION_META_INFO_VOLNAMELTH]; | |
97 | }; | |
98 | ||
99 | struct hd_struct { | |
100 | sector_t start_sect; | |
101 | sector_t nr_sects; | |
102 | sector_t alignment_offset; | |
103 | unsigned int discard_alignment; | |
104 | struct device __dev; | |
105 | struct kobject *holder_dir; | |
106 | int policy, partno; | |
107 | struct partition_meta_info *info; | |
108 | #ifdef CONFIG_FAIL_MAKE_REQUEST | |
109 | int make_it_fail; | |
110 | #endif | |
111 | unsigned long stamp; | |
112 | int in_flight[2]; | |
113 | #ifdef CONFIG_SMP | |
114 | struct disk_stats __percpu *dkstats; | |
115 | #else | |
116 | struct disk_stats dkstats; | |
117 | #endif | |
118 | struct rcu_head rcu_head; | |
119 | }; | |
120 | ||
121 | #define GENHD_FL_REMOVABLE 1 | |
122 | /* 2 is unused */ | |
123 | #define GENHD_FL_MEDIA_CHANGE_NOTIFY 4 | |
124 | #define GENHD_FL_CD 8 | |
125 | #define GENHD_FL_UP 16 | |
126 | #define GENHD_FL_SUPPRESS_PARTITION_INFO 32 | |
127 | #define GENHD_FL_EXT_DEVT 64 /* allow extended devt */ | |
128 | #define GENHD_FL_NATIVE_CAPACITY 128 | |
129 | ||
130 | #define BLK_SCSI_MAX_CMDS (256) | |
131 | #define BLK_SCSI_CMD_PER_LONG (BLK_SCSI_MAX_CMDS / (sizeof(long) * 8)) | |
132 | ||
133 | struct blk_scsi_cmd_filter { | |
134 | unsigned long read_ok[BLK_SCSI_CMD_PER_LONG]; | |
135 | unsigned long write_ok[BLK_SCSI_CMD_PER_LONG]; | |
136 | struct kobject kobj; | |
137 | }; | |
138 | ||
139 | struct disk_part_tbl { | |
140 | struct rcu_head rcu_head; | |
141 | int len; | |
142 | struct hd_struct *last_lookup; | |
143 | struct hd_struct *part[]; | |
144 | }; | |
145 | ||
146 | struct gendisk { | |
147 | /* major, first_minor and minors are input parameters only, | |
148 | * don't use directly. Use disk_devt() and disk_max_parts(). | |
149 | */ | |
150 | int major; /* major number of driver */ | |
151 | int first_minor; | |
152 | int minors; /* maximum number of minors, =1 for | |
153 | * disks that can't be partitioned. */ | |
154 | ||
155 | char disk_name[DISK_NAME_LEN]; /* name of major driver */ | |
156 | char *(*devnode)(struct gendisk *gd, mode_t *mode); | |
157 | /* Array of pointers to partitions indexed by partno. | |
158 | * Protected with matching bdev lock but stat and other | |
159 | * non-critical accesses use RCU. Always access through | |
160 | * helpers. | |
161 | */ | |
162 | struct disk_part_tbl *part_tbl; | |
163 | struct hd_struct part0; | |
164 | ||
165 | const struct block_device_operations *fops; | |
166 | struct request_queue *queue; | |
167 | void *private_data; | |
168 | ||
169 | int flags; | |
170 | struct device *driverfs_dev; // FIXME: remove | |
171 | struct kobject *slave_dir; | |
172 | ||
173 | struct timer_rand_state *random; | |
174 | ||
175 | atomic_t sync_io; /* RAID */ | |
176 | struct work_struct async_notify; | |
177 | #ifdef CONFIG_BLK_DEV_INTEGRITY | |
178 | struct blk_integrity *integrity; | |
179 | #endif | |
180 | int node_id; | |
181 | }; | |
182 | ||
183 | static inline struct gendisk *part_to_disk(struct hd_struct *part) | |
184 | { | |
185 | if (likely(part)) { | |
186 | if (part->partno) | |
187 | return dev_to_disk(part_to_dev(part)->parent); | |
188 | else | |
189 | return dev_to_disk(part_to_dev(part)); | |
190 | } | |
191 | return NULL; | |
192 | } | |
193 | ||
194 | static inline void part_pack_uuid(const u8 *uuid_str, u8 *to) | |
195 | { | |
196 | int i; | |
197 | for (i = 0; i < 16; ++i) { | |
198 | *to++ = (hex_to_bin(*uuid_str) << 4) | | |
199 | (hex_to_bin(*(uuid_str + 1))); | |
200 | uuid_str += 2; | |
201 | switch (i) { | |
202 | case 3: | |
203 | case 5: | |
204 | case 7: | |
205 | case 9: | |
206 | uuid_str++; | |
207 | continue; | |
208 | } | |
209 | } | |
210 | } | |
211 | ||
212 | static inline char *part_unpack_uuid(const u8 *uuid, char *out) | |
213 | { | |
214 | sprintf(out, "%pU", uuid); | |
215 | return out; | |
216 | } | |
217 | ||
218 | static inline int disk_max_parts(struct gendisk *disk) | |
219 | { | |
220 | if (disk->flags & GENHD_FL_EXT_DEVT) | |
221 | return DISK_MAX_PARTS; | |
222 | return disk->minors; | |
223 | } | |
224 | ||
225 | static inline bool disk_partitionable(struct gendisk *disk) | |
226 | { | |
227 | return disk_max_parts(disk) > 1; | |
228 | } | |
229 | ||
230 | static inline dev_t disk_devt(struct gendisk *disk) | |
231 | { | |
232 | return disk_to_dev(disk)->devt; | |
233 | } | |
234 | ||
235 | static inline dev_t part_devt(struct hd_struct *part) | |
236 | { | |
237 | return part_to_dev(part)->devt; | |
238 | } | |
239 | ||
240 | extern struct hd_struct *disk_get_part(struct gendisk *disk, int partno); | |
241 | ||
242 | static inline void disk_put_part(struct hd_struct *part) | |
243 | { | |
244 | if (likely(part)) | |
245 | put_device(part_to_dev(part)); | |
246 | } | |
247 | ||
248 | /* | |
249 | * Smarter partition iterator without context limits. | |
250 | */ | |
251 | #define DISK_PITER_REVERSE (1 << 0) /* iterate in the reverse direction */ | |
252 | #define DISK_PITER_INCL_EMPTY (1 << 1) /* include 0-sized parts */ | |
253 | #define DISK_PITER_INCL_PART0 (1 << 2) /* include partition 0 */ | |
254 | #define DISK_PITER_INCL_EMPTY_PART0 (1 << 3) /* include empty partition 0 */ | |
255 | ||
256 | struct disk_part_iter { | |
257 | struct gendisk *disk; | |
258 | struct hd_struct *part; | |
259 | int idx; | |
260 | unsigned int flags; | |
261 | }; | |
262 | ||
263 | extern void disk_part_iter_init(struct disk_part_iter *piter, | |
264 | struct gendisk *disk, unsigned int flags); | |
265 | extern struct hd_struct *disk_part_iter_next(struct disk_part_iter *piter); | |
266 | extern void disk_part_iter_exit(struct disk_part_iter *piter); | |
267 | ||
268 | extern struct hd_struct *disk_map_sector_rcu(struct gendisk *disk, | |
269 | sector_t sector); | |
270 | ||
271 | /* | |
272 | * Macros to operate on percpu disk statistics: | |
273 | * | |
274 | * {disk|part|all}_stat_{add|sub|inc|dec}() modify the stat counters | |
275 | * and should be called between disk_stat_lock() and | |
276 | * disk_stat_unlock(). | |
277 | * | |
278 | * part_stat_read() can be called at any time. | |
279 | * | |
280 | * part_stat_{add|set_all}() and {init|free}_part_stats are for | |
281 | * internal use only. | |
282 | */ | |
283 | #ifdef CONFIG_SMP | |
284 | #define part_stat_lock() ({ rcu_read_lock(); get_cpu(); }) | |
285 | #define part_stat_unlock() do { put_cpu(); rcu_read_unlock(); } while (0) | |
286 | ||
287 | #define __part_stat_add(cpu, part, field, addnd) \ | |
288 | (per_cpu_ptr((part)->dkstats, (cpu))->field += (addnd)) | |
289 | ||
290 | #define part_stat_read(part, field) \ | |
291 | ({ \ | |
292 | typeof((part)->dkstats->field) res = 0; \ | |
293 | unsigned int _cpu; \ | |
294 | for_each_possible_cpu(_cpu) \ | |
295 | res += per_cpu_ptr((part)->dkstats, _cpu)->field; \ | |
296 | res; \ | |
297 | }) | |
298 | ||
299 | static inline void part_stat_set_all(struct hd_struct *part, int value) | |
300 | { | |
301 | int i; | |
302 | ||
303 | for_each_possible_cpu(i) | |
304 | memset(per_cpu_ptr(part->dkstats, i), value, | |
305 | sizeof(struct disk_stats)); | |
306 | } | |
307 | ||
308 | static inline int init_part_stats(struct hd_struct *part) | |
309 | { | |
310 | part->dkstats = alloc_percpu(struct disk_stats); | |
311 | if (!part->dkstats) | |
312 | return 0; | |
313 | return 1; | |
314 | } | |
315 | ||
316 | static inline void free_part_stats(struct hd_struct *part) | |
317 | { | |
318 | free_percpu(part->dkstats); | |
319 | } | |
320 | ||
321 | #else /* !CONFIG_SMP */ | |
322 | #define part_stat_lock() ({ rcu_read_lock(); 0; }) | |
323 | #define part_stat_unlock() rcu_read_unlock() | |
324 | ||
325 | #define __part_stat_add(cpu, part, field, addnd) \ | |
326 | ((part)->dkstats.field += addnd) | |
327 | ||
328 | #define part_stat_read(part, field) ((part)->dkstats.field) | |
329 | ||
330 | static inline void part_stat_set_all(struct hd_struct *part, int value) | |
331 | { | |
332 | memset(&part->dkstats, value, sizeof(struct disk_stats)); | |
333 | } | |
334 | ||
335 | static inline int init_part_stats(struct hd_struct *part) | |
336 | { | |
337 | return 1; | |
338 | } | |
339 | ||
340 | static inline void free_part_stats(struct hd_struct *part) | |
341 | { | |
342 | } | |
343 | ||
344 | #endif /* CONFIG_SMP */ | |
345 | ||
346 | #define part_stat_add(cpu, part, field, addnd) do { \ | |
347 | __part_stat_add((cpu), (part), field, addnd); \ | |
348 | if ((part)->partno) \ | |
349 | __part_stat_add((cpu), &part_to_disk((part))->part0, \ | |
350 | field, addnd); \ | |
351 | } while (0) | |
352 | ||
353 | #define part_stat_dec(cpu, gendiskp, field) \ | |
354 | part_stat_add(cpu, gendiskp, field, -1) | |
355 | #define part_stat_inc(cpu, gendiskp, field) \ | |
356 | part_stat_add(cpu, gendiskp, field, 1) | |
357 | #define part_stat_sub(cpu, gendiskp, field, subnd) \ | |
358 | part_stat_add(cpu, gendiskp, field, -subnd) | |
359 | ||
360 | static inline void part_inc_in_flight(struct hd_struct *part, int rw) | |
361 | { | |
362 | part->in_flight[rw]++; | |
363 | if (part->partno) | |
364 | part_to_disk(part)->part0.in_flight[rw]++; | |
365 | } | |
366 | ||
367 | static inline void part_dec_in_flight(struct hd_struct *part, int rw) | |
368 | { | |
369 | part->in_flight[rw]--; | |
370 | if (part->partno) | |
371 | part_to_disk(part)->part0.in_flight[rw]--; | |
372 | } | |
373 | ||
374 | static inline int part_in_flight(struct hd_struct *part) | |
375 | { | |
376 | return part->in_flight[0] + part->in_flight[1]; | |
377 | } | |
378 | ||
379 | static inline struct partition_meta_info *alloc_part_info(struct gendisk *disk) | |
380 | { | |
381 | if (disk) | |
382 | return kzalloc_node(sizeof(struct partition_meta_info), | |
383 | GFP_KERNEL, disk->node_id); | |
384 | return kzalloc(sizeof(struct partition_meta_info), GFP_KERNEL); | |
385 | } | |
386 | ||
387 | static inline void free_part_info(struct hd_struct *part) | |
388 | { | |
389 | kfree(part->info); | |
390 | } | |
391 | ||
392 | /* block/blk-core.c */ | |
393 | extern void part_round_stats(int cpu, struct hd_struct *part); | |
394 | ||
395 | /* block/genhd.c */ | |
396 | extern void add_disk(struct gendisk *disk); | |
397 | extern void del_gendisk(struct gendisk *gp); | |
398 | extern void unlink_gendisk(struct gendisk *gp); | |
399 | extern struct gendisk *get_gendisk(dev_t dev, int *partno); | |
400 | extern struct block_device *bdget_disk(struct gendisk *disk, int partno); | |
401 | ||
402 | extern void set_device_ro(struct block_device *bdev, int flag); | |
403 | extern void set_disk_ro(struct gendisk *disk, int flag); | |
404 | ||
405 | static inline int get_disk_ro(struct gendisk *disk) | |
406 | { | |
407 | return disk->part0.policy; | |
408 | } | |
409 | ||
410 | /* drivers/char/random.c */ | |
411 | extern void add_disk_randomness(struct gendisk *disk); | |
412 | extern void rand_initialize_disk(struct gendisk *disk); | |
413 | ||
414 | static inline sector_t get_start_sect(struct block_device *bdev) | |
415 | { | |
416 | return bdev->bd_part->start_sect; | |
417 | } | |
418 | static inline sector_t get_capacity(struct gendisk *disk) | |
419 | { | |
420 | return disk->part0.nr_sects; | |
421 | } | |
422 | static inline void set_capacity(struct gendisk *disk, sector_t size) | |
423 | { | |
424 | disk->part0.nr_sects = size; | |
425 | } | |
426 | ||
427 | #ifdef CONFIG_SOLARIS_X86_PARTITION | |
428 | ||
429 | #define SOLARIS_X86_NUMSLICE 16 | |
430 | #define SOLARIS_X86_VTOC_SANE (0x600DDEEEUL) | |
431 | ||
432 | struct solaris_x86_slice { | |
433 | __le16 s_tag; /* ID tag of partition */ | |
434 | __le16 s_flag; /* permission flags */ | |
435 | __le32 s_start; /* start sector no of partition */ | |
436 | __le32 s_size; /* # of blocks in partition */ | |
437 | }; | |
438 | ||
439 | struct solaris_x86_vtoc { | |
440 | unsigned int v_bootinfo[3]; /* info needed by mboot (unsupported) */ | |
441 | __le32 v_sanity; /* to verify vtoc sanity */ | |
442 | __le32 v_version; /* layout version */ | |
443 | char v_volume[8]; /* volume name */ | |
444 | __le16 v_sectorsz; /* sector size in bytes */ | |
445 | __le16 v_nparts; /* number of partitions */ | |
446 | unsigned int v_reserved[10]; /* free space */ | |
447 | struct solaris_x86_slice | |
448 | v_slice[SOLARIS_X86_NUMSLICE]; /* slice headers */ | |
449 | unsigned int timestamp[SOLARIS_X86_NUMSLICE]; /* timestamp (unsupported) */ | |
450 | char v_asciilabel[128]; /* for compatibility */ | |
451 | }; | |
452 | ||
453 | #endif /* CONFIG_SOLARIS_X86_PARTITION */ | |
454 | ||
455 | #ifdef CONFIG_BSD_DISKLABEL | |
456 | /* | |
457 | * BSD disklabel support by Yossi Gottlieb <yogo@math.tau.ac.il> | |
458 | * updated by Marc Espie <Marc.Espie@openbsd.org> | |
459 | */ | |
460 | ||
461 | /* check against BSD src/sys/sys/disklabel.h for consistency */ | |
462 | ||
463 | #define BSD_DISKMAGIC (0x82564557UL) /* The disk magic number */ | |
464 | #define BSD_MAXPARTITIONS 16 | |
465 | #define OPENBSD_MAXPARTITIONS 16 | |
466 | #define BSD_FS_UNUSED 0 /* disklabel unused partition entry ID */ | |
467 | struct bsd_disklabel { | |
468 | __le32 d_magic; /* the magic number */ | |
469 | __s16 d_type; /* drive type */ | |
470 | __s16 d_subtype; /* controller/d_type specific */ | |
471 | char d_typename[16]; /* type name, e.g. "eagle" */ | |
472 | char d_packname[16]; /* pack identifier */ | |
473 | __u32 d_secsize; /* # of bytes per sector */ | |
474 | __u32 d_nsectors; /* # of data sectors per track */ | |
475 | __u32 d_ntracks; /* # of tracks per cylinder */ | |
476 | __u32 d_ncylinders; /* # of data cylinders per unit */ | |
477 | __u32 d_secpercyl; /* # of data sectors per cylinder */ | |
478 | __u32 d_secperunit; /* # of data sectors per unit */ | |
479 | __u16 d_sparespertrack; /* # of spare sectors per track */ | |
480 | __u16 d_sparespercyl; /* # of spare sectors per cylinder */ | |
481 | __u32 d_acylinders; /* # of alt. cylinders per unit */ | |
482 | __u16 d_rpm; /* rotational speed */ | |
483 | __u16 d_interleave; /* hardware sector interleave */ | |
484 | __u16 d_trackskew; /* sector 0 skew, per track */ | |
485 | __u16 d_cylskew; /* sector 0 skew, per cylinder */ | |
486 | __u32 d_headswitch; /* head switch time, usec */ | |
487 | __u32 d_trkseek; /* track-to-track seek, usec */ | |
488 | __u32 d_flags; /* generic flags */ | |
489 | #define NDDATA 5 | |
490 | __u32 d_drivedata[NDDATA]; /* drive-type specific information */ | |
491 | #define NSPARE 5 | |
492 | __u32 d_spare[NSPARE]; /* reserved for future use */ | |
493 | __le32 d_magic2; /* the magic number (again) */ | |
494 | __le16 d_checksum; /* xor of data incl. partitions */ | |
495 | ||
496 | /* filesystem and partition information: */ | |
497 | __le16 d_npartitions; /* number of partitions in following */ | |
498 | __le32 d_bbsize; /* size of boot area at sn0, bytes */ | |
499 | __le32 d_sbsize; /* max size of fs superblock, bytes */ | |
500 | struct bsd_partition { /* the partition table */ | |
501 | __le32 p_size; /* number of sectors in partition */ | |
502 | __le32 p_offset; /* starting sector */ | |
503 | __le32 p_fsize; /* filesystem basic fragment size */ | |
504 | __u8 p_fstype; /* filesystem type, see below */ | |
505 | __u8 p_frag; /* filesystem fragments per block */ | |
506 | __le16 p_cpg; /* filesystem cylinders per group */ | |
507 | } d_partitions[BSD_MAXPARTITIONS]; /* actually may be more */ | |
508 | }; | |
509 | ||
510 | #endif /* CONFIG_BSD_DISKLABEL */ | |
511 | ||
512 | #ifdef CONFIG_UNIXWARE_DISKLABEL | |
513 | /* | |
514 | * Unixware slices support by Andrzej Krzysztofowicz <ankry@mif.pg.gda.pl> | |
515 | * and Krzysztof G. Baranowski <kgb@knm.org.pl> | |
516 | */ | |
517 | ||
518 | #define UNIXWARE_DISKMAGIC (0xCA5E600DUL) /* The disk magic number */ | |
519 | #define UNIXWARE_DISKMAGIC2 (0x600DDEEEUL) /* The slice table magic nr */ | |
520 | #define UNIXWARE_NUMSLICE 16 | |
521 | #define UNIXWARE_FS_UNUSED 0 /* Unused slice entry ID */ | |
522 | ||
523 | struct unixware_slice { | |
524 | __le16 s_label; /* label */ | |
525 | __le16 s_flags; /* permission flags */ | |
526 | __le32 start_sect; /* starting sector */ | |
527 | __le32 nr_sects; /* number of sectors in slice */ | |
528 | }; | |
529 | ||
530 | struct unixware_disklabel { | |
531 | __le32 d_type; /* drive type */ | |
532 | __le32 d_magic; /* the magic number */ | |
533 | __le32 d_version; /* version number */ | |
534 | char d_serial[12]; /* serial number of the device */ | |
535 | __le32 d_ncylinders; /* # of data cylinders per device */ | |
536 | __le32 d_ntracks; /* # of tracks per cylinder */ | |
537 | __le32 d_nsectors; /* # of data sectors per track */ | |
538 | __le32 d_secsize; /* # of bytes per sector */ | |
539 | __le32 d_part_start; /* # of first sector of this partition */ | |
540 | __le32 d_unknown1[12]; /* ? */ | |
541 | __le32 d_alt_tbl; /* byte offset of alternate table */ | |
542 | __le32 d_alt_len; /* byte length of alternate table */ | |
543 | __le32 d_phys_cyl; /* # of physical cylinders per device */ | |
544 | __le32 d_phys_trk; /* # of physical tracks per cylinder */ | |
545 | __le32 d_phys_sec; /* # of physical sectors per track */ | |
546 | __le32 d_phys_bytes; /* # of physical bytes per sector */ | |
547 | __le32 d_unknown2; /* ? */ | |
548 | __le32 d_unknown3; /* ? */ | |
549 | __le32 d_pad[8]; /* pad */ | |
550 | ||
551 | struct unixware_vtoc { | |
552 | __le32 v_magic; /* the magic number */ | |
553 | __le32 v_version; /* version number */ | |
554 | char v_name[8]; /* volume name */ | |
555 | __le16 v_nslices; /* # of slices */ | |
556 | __le16 v_unknown1; /* ? */ | |
557 | __le32 v_reserved[10]; /* reserved */ | |
558 | struct unixware_slice | |
559 | v_slice[UNIXWARE_NUMSLICE]; /* slice headers */ | |
560 | } vtoc; | |
561 | ||
562 | }; /* 408 */ | |
563 | ||
564 | #endif /* CONFIG_UNIXWARE_DISKLABEL */ | |
565 | ||
566 | #ifdef CONFIG_MINIX_SUBPARTITION | |
567 | # define MINIX_NR_SUBPARTITIONS 4 | |
568 | #endif /* CONFIG_MINIX_SUBPARTITION */ | |
569 | ||
570 | #define ADDPART_FLAG_NONE 0 | |
571 | #define ADDPART_FLAG_RAID 1 | |
572 | #define ADDPART_FLAG_WHOLEDISK 2 | |
573 | ||
574 | extern int blk_alloc_devt(struct hd_struct *part, dev_t *devt); | |
575 | extern void blk_free_devt(dev_t devt); | |
576 | extern dev_t blk_lookup_devt(const char *name, int partno); | |
577 | extern char *disk_name (struct gendisk *hd, int partno, char *buf); | |
578 | ||
579 | extern int disk_expand_part_tbl(struct gendisk *disk, int target); | |
580 | extern int rescan_partitions(struct gendisk *disk, struct block_device *bdev); | |
581 | extern struct hd_struct * __must_check add_partition(struct gendisk *disk, | |
582 | int partno, sector_t start, | |
583 | sector_t len, int flags, | |
584 | struct partition_meta_info | |
585 | *info); | |
586 | extern void delete_partition(struct gendisk *, int); | |
587 | extern void printk_all_partitions(void); | |
588 | ||
589 | extern struct gendisk *alloc_disk_node(int minors, int node_id); | |
590 | extern struct gendisk *alloc_disk(int minors); | |
591 | extern struct kobject *get_disk(struct gendisk *disk); | |
592 | extern void put_disk(struct gendisk *disk); | |
593 | extern void blk_register_region(dev_t devt, unsigned long range, | |
594 | struct module *module, | |
595 | struct kobject *(*probe)(dev_t, int *, void *), | |
596 | int (*lock)(dev_t, void *), | |
597 | void *data); | |
598 | extern void blk_unregister_region(dev_t devt, unsigned long range); | |
599 | ||
600 | extern ssize_t part_size_show(struct device *dev, | |
601 | struct device_attribute *attr, char *buf); | |
602 | extern ssize_t part_stat_show(struct device *dev, | |
603 | struct device_attribute *attr, char *buf); | |
604 | extern ssize_t part_inflight_show(struct device *dev, | |
605 | struct device_attribute *attr, char *buf); | |
606 | #ifdef CONFIG_FAIL_MAKE_REQUEST | |
607 | extern ssize_t part_fail_show(struct device *dev, | |
608 | struct device_attribute *attr, char *buf); | |
609 | extern ssize_t part_fail_store(struct device *dev, | |
610 | struct device_attribute *attr, | |
611 | const char *buf, size_t count); | |
612 | #endif /* CONFIG_FAIL_MAKE_REQUEST */ | |
613 | ||
614 | #else /* CONFIG_BLOCK */ | |
615 | ||
616 | static inline void printk_all_partitions(void) { } | |
617 | ||
618 | static inline dev_t blk_lookup_devt(const char *name, int partno) | |
619 | { | |
620 | dev_t devt = MKDEV(0, 0); | |
621 | return devt; | |
622 | } | |
623 | ||
624 | #endif /* CONFIG_BLOCK */ | |
625 | ||
626 | #endif /* _LINUX_GENHD_H */ |