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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 __rcu *last_lookup; |
143 | struct hd_struct __rcu *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 __rcu *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 */ |
627 |
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od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
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v3.9