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1 | /* | |
2 | * mdadm - manage Linux "md" devices aka RAID arrays. | |
3 | * | |
4 | * Copyright (C) 2001-2006 Neil Brown <neilb@suse.de> | |
5 | * | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | * | |
21 | * Author: Neil Brown | |
22 | * Email: <neilb@cse.unsw.edu.au> | |
23 | * Paper: Neil Brown | |
24 | * School of Computer Science and Engineering | |
25 | * The University of New South Wales | |
26 | * Sydney, 2052 | |
27 | * Australia | |
28 | */ | |
29 | ||
30 | #define _GNU_SOURCE | |
31 | #include <unistd.h> | |
32 | #ifndef __dietlibc__ | |
33 | extern __off64_t lseek64 __P ((int __fd, __off64_t __offset, int __whence)); | |
34 | #else | |
35 | # if defined(__NO_STAT64) || __WORDSIZE != 32 | |
36 | # define lseek64 lseek | |
37 | # endif | |
38 | #endif | |
39 | ||
40 | #include <sys/types.h> | |
41 | #include <sys/stat.h> | |
42 | #include <stdlib.h> | |
43 | #include <time.h> | |
44 | #include <sys/time.h> | |
45 | #include <getopt.h> | |
46 | #include <fcntl.h> | |
47 | #include <stdio.h> | |
48 | #include <errno.h> | |
49 | #include <string.h> | |
50 | #include <syslog.h> | |
51 | #ifdef __dietlibc__ | |
52 | #include <strings.h> | |
53 | /* dietlibc has deprecated random and srandom!! */ | |
54 | #define random rand | |
55 | #define srandom srand | |
56 | #endif | |
57 | ||
58 | ||
59 | #include <linux/kdev_t.h> | |
60 | /*#include <linux/fs.h> */ | |
61 | #include <sys/mount.h> | |
62 | #include <asm/types.h> | |
63 | #include <sys/ioctl.h> | |
64 | #define MD_MAJOR 9 | |
65 | #define MdpMinorShift 6 | |
66 | ||
67 | #ifndef BLKGETSIZE64 | |
68 | #define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 *arg) */ | |
69 | #endif | |
70 | ||
71 | #define DEFAULT_BITMAP_CHUNK 4096 | |
72 | #define DEFAULT_BITMAP_DELAY 5 | |
73 | #define DEFAULT_MAX_WRITE_BEHIND 256 | |
74 | ||
75 | #include "md_u.h" | |
76 | #include "md_p.h" | |
77 | #include "bitmap.h" | |
78 | ||
79 | #include <endian.h> | |
80 | /* Redhat don't like to #include <asm/byteorder.h>, and | |
81 | * some time include <linux/byteorder/xxx_endian.h> isn't enough, | |
82 | * and there is no standard conversion function so... */ | |
83 | /* And dietlibc doesn't think byteswap is ok, so.. */ | |
84 | /* #include <byteswap.h> */ | |
85 | #define bswap_16(x) (((x) & 0x00ffU) << 8 | \ | |
86 | ((x) & 0xff00U) >> 8) | |
87 | #define bswap_32(x) (((x) & 0x000000ffU) << 24 | \ | |
88 | ((x) & 0xff000000U) >> 24 | \ | |
89 | ((x) & 0x0000ff00U) << 8 | \ | |
90 | ((x) & 0x00ff0000U) >> 8) | |
91 | #define bswap_64(x) (((x) & 0x00000000000000ffULL) << 56 | \ | |
92 | ((x) & 0xff00000000000000ULL) >> 56 | \ | |
93 | ((x) & 0x000000000000ff00ULL) << 40 | \ | |
94 | ((x) & 0x00ff000000000000ULL) >> 40 | \ | |
95 | ((x) & 0x0000000000ff0000ULL) << 24 | \ | |
96 | ((x) & 0x0000ff0000000000ULL) >> 24 | \ | |
97 | ((x) & 0x00000000ff000000ULL) << 8 | \ | |
98 | ((x) & 0x000000ff00000000ULL) >> 8) | |
99 | ||
100 | #if BYTE_ORDER == LITTLE_ENDIAN | |
101 | #define __cpu_to_le16(_x) (_x) | |
102 | #define __cpu_to_le32(_x) (_x) | |
103 | #define __cpu_to_le64(_x) (_x) | |
104 | #define __le16_to_cpu(_x) (_x) | |
105 | #define __le32_to_cpu(_x) (_x) | |
106 | #define __le64_to_cpu(_x) (_x) | |
107 | #elif BYTE_ORDER == BIG_ENDIAN | |
108 | #define __cpu_to_le16(_x) bswap_16(_x) | |
109 | #define __cpu_to_le32(_x) bswap_32(_x) | |
110 | #define __cpu_to_le64(_x) bswap_64(_x) | |
111 | #define __le16_to_cpu(_x) bswap_16(_x) | |
112 | #define __le32_to_cpu(_x) bswap_32(_x) | |
113 | #define __le64_to_cpu(_x) bswap_64(_x) | |
114 | #else | |
115 | # error "unknown endianness." | |
116 | #endif | |
117 | ||
118 | ||
119 | ||
120 | /* general information that might be extracted from a superblock */ | |
121 | struct mdinfo { | |
122 | mdu_array_info_t array; | |
123 | mdu_disk_info_t disk; | |
124 | __u64 events; | |
125 | int uuid[4]; | |
126 | char name[33]; | |
127 | unsigned long long data_offset; | |
128 | unsigned long long component_size; | |
129 | int reshape_active; | |
130 | unsigned long long reshape_progress; | |
131 | int new_level, delta_disks, new_layout, new_chunk; | |
132 | }; | |
133 | ||
134 | struct createinfo { | |
135 | int uid; | |
136 | int gid; | |
137 | int autof; | |
138 | int mode; | |
139 | int symlinks; | |
140 | struct supertype *supertype; | |
141 | }; | |
142 | ||
143 | #define Name "mdadm" | |
144 | ||
145 | enum mode { | |
146 | ASSEMBLE=1, | |
147 | BUILD, | |
148 | CREATE, | |
149 | MANAGE, | |
150 | MISC, | |
151 | MONITOR, | |
152 | GROW, | |
153 | INCREMENTAL, | |
154 | AUTODETECT, | |
155 | }; | |
156 | ||
157 | extern char short_options[]; | |
158 | extern char short_bitmap_options[]; | |
159 | extern char short_bitmap_auto_options[]; | |
160 | extern struct option long_options[]; | |
161 | extern char Version[], Usage[], Help[], OptionHelp[], | |
162 | Help_create[], Help_build[], Help_assemble[], Help_grow[], | |
163 | Help_incr[], | |
164 | Help_manage[], Help_misc[], Help_monitor[], Help_config[]; | |
165 | ||
166 | /* for option that don't have short equivilents, we assign arbitrary | |
167 | * small numbers. '1' means an undecorated option, so we start at '2'. | |
168 | */ | |
169 | enum special_options { | |
170 | AssumeClean = 2, | |
171 | BitmapChunk, | |
172 | WriteBehind, | |
173 | ReAdd, | |
174 | NoDegraded, | |
175 | Sparc22, | |
176 | BackupFile, | |
177 | HomeHost, | |
178 | AutoHomeHost, | |
179 | Symlinks, | |
180 | AutoDetect, | |
181 | }; | |
182 | ||
183 | /* structures read from config file */ | |
184 | /* List of mddevice names and identifiers | |
185 | * Identifiers can be: | |
186 | * uuid=128-hex-uuid | |
187 | * super-minor=decimal-minor-number-from-superblock | |
188 | * devices=comma,separated,list,of,device,names,with,wildcards | |
189 | * | |
190 | * If multiple fields are present, the intersection of all matching | |
191 | * devices is considered | |
192 | */ | |
193 | #define UnSet (0xfffe) | |
194 | typedef struct mddev_ident_s { | |
195 | char *devname; | |
196 | ||
197 | int uuid_set; | |
198 | int uuid[4]; | |
199 | char name[33]; | |
200 | ||
201 | unsigned int super_minor; | |
202 | ||
203 | char *devices; /* comma separated list of device | |
204 | * names with wild cards | |
205 | */ | |
206 | int level; | |
207 | unsigned int raid_disks; | |
208 | unsigned int spare_disks; | |
209 | struct supertype *st; | |
210 | int autof; /* 1 for normal, 2 for partitioned */ | |
211 | char *spare_group; | |
212 | char *bitmap_file; | |
213 | int bitmap_fd; | |
214 | ||
215 | struct mddev_ident_s *next; | |
216 | } *mddev_ident_t; | |
217 | ||
218 | /* List of device names - wildcards expanded */ | |
219 | typedef struct mddev_dev_s { | |
220 | char *devname; | |
221 | char disposition; /* 'a' for add, 'r' for remove, 'f' for fail. | |
222 | * Not set for names read from .config | |
223 | */ | |
224 | char writemostly; | |
225 | char re_add; | |
226 | char used; /* set when used */ | |
227 | struct mddev_dev_s *next; | |
228 | } *mddev_dev_t; | |
229 | ||
230 | typedef struct mapping { | |
231 | char *name; | |
232 | int num; | |
233 | } mapping_t; | |
234 | ||
235 | ||
236 | struct mdstat_ent { | |
237 | char *dev; | |
238 | int devnum; | |
239 | int active; | |
240 | char *level; | |
241 | char *pattern; /* U or up, _ for down */ | |
242 | int percent; /* -1 if no resync */ | |
243 | int resync; /* 1 if resync, 0 if recovery */ | |
244 | struct mdstat_ent *next; | |
245 | }; | |
246 | ||
247 | extern struct mdstat_ent *mdstat_read(int hold, int start); | |
248 | extern void free_mdstat(struct mdstat_ent *ms); | |
249 | extern void mdstat_wait(int seconds); | |
250 | extern int mddev_busy(int devnum); | |
251 | ||
252 | struct map_ent { | |
253 | struct map_ent *next; | |
254 | int devnum; | |
255 | int major,minor; | |
256 | int uuid[4]; | |
257 | char *path; | |
258 | }; | |
259 | extern int map_update(struct map_ent **mpp, int devnum, int major, int minor, | |
260 | int uuid[4], char *path); | |
261 | extern struct map_ent *map_by_uuid(struct map_ent **map, int uuid[4]); | |
262 | extern void map_read(struct map_ent **melp); | |
263 | extern int map_write(struct map_ent *mel); | |
264 | extern void map_delete(struct map_ent **mapp, int devnum); | |
265 | extern void map_free(struct map_ent *map); | |
266 | extern void map_add(struct map_ent **melp, | |
267 | int devnum, int major, int minor, int uuid[4], char *path); | |
268 | ||
269 | /* Data structure for holding info read from sysfs */ | |
270 | struct sysdev { | |
271 | char name[20]; | |
272 | int role; | |
273 | int major, minor; | |
274 | unsigned long long offset, size; | |
275 | int state; | |
276 | int errors; | |
277 | struct sysdev *next; | |
278 | }; | |
279 | struct sysarray { | |
280 | char name[20]; | |
281 | struct sysdev *devs; | |
282 | int chunk; | |
283 | unsigned long long component_size; | |
284 | int layout; | |
285 | int level; | |
286 | int spares; | |
287 | int cache_size; | |
288 | int mismatch_cnt; | |
289 | int major_version, minor_version; | |
290 | }; | |
291 | /* various details can be requested */ | |
292 | #define GET_LEVEL 1 | |
293 | #define GET_LAYOUT 2 | |
294 | #define GET_COMPONENT 4 | |
295 | #define GET_CHUNK 8 | |
296 | #define GET_CACHE 16 | |
297 | #define GET_MISMATCH 32 | |
298 | #define GET_VERSION 64 | |
299 | ||
300 | #define GET_DEVS 1024 /* gets role, major, minor */ | |
301 | #define GET_OFFSET 2048 | |
302 | #define GET_SIZE 4096 | |
303 | #define GET_STATE 8192 | |
304 | #define GET_ERROR 16384 | |
305 | ||
306 | /* If fd >= 0, get the array it is open on, | |
307 | * else use devnum. >=0 -> major9. <0..... | |
308 | */ | |
309 | extern void sysfs_free(struct sysarray *sra); | |
310 | extern struct sysarray *sysfs_read(int fd, int devnum, unsigned long options); | |
311 | extern int sysfs_set_str(struct sysarray *sra, struct sysdev *dev, | |
312 | char *name, char *val); | |
313 | extern int sysfs_set_num(struct sysarray *sra, struct sysdev *dev, | |
314 | char *name, unsigned long long val); | |
315 | extern int sysfs_get_ll(struct sysarray *sra, struct sysdev *dev, | |
316 | char *name, unsigned long long *val); | |
317 | ||
318 | ||
319 | extern int save_stripes(int *source, unsigned long long *offsets, | |
320 | int raid_disks, int chunk_size, int level, int layout, | |
321 | int nwrites, int *dest, | |
322 | unsigned long long start, unsigned long long length); | |
323 | extern int restore_stripes(int *dest, unsigned long long *offsets, | |
324 | int raid_disks, int chunk_size, int level, int layout, | |
325 | int source, unsigned long long read_offset, | |
326 | unsigned long long start, unsigned long long length); | |
327 | ||
328 | #ifndef Sendmail | |
329 | #define Sendmail "/usr/lib/sendmail -t" | |
330 | #endif | |
331 | ||
332 | #define SYSLOG_FACILITY LOG_DAEMON | |
333 | ||
334 | extern char *map_num(mapping_t *map, int num); | |
335 | extern int map_name(mapping_t *map, char *name); | |
336 | extern mapping_t r5layout[], pers[], modes[], faultylayout[]; | |
337 | ||
338 | extern char *map_dev(int major, int minor, int create); | |
339 | ||
340 | ||
341 | extern struct superswitch { | |
342 | void (*examine_super)(void *sbv, char *homehost); | |
343 | void (*brief_examine_super)(void *sbv); | |
344 | void (*detail_super)(void *sbv, char *homehost); | |
345 | void (*export_super)(void *sbv); | |
346 | void (*brief_detail_super)(void *sbv); | |
347 | void (*uuid_from_super)(int uuid[4], void *sbv); | |
348 | void (*getinfo_super)(struct mdinfo *info, void *sbv); | |
349 | int (*match_home)(void *sbv, char *homehost); | |
350 | int (*update_super)(struct mdinfo *info, void *sbv, char *update, | |
351 | char *devname, int verbose, | |
352 | int uuid_set, char *homehost); | |
353 | int (*init_super)(struct supertype *st, void **sbp, mdu_array_info_t *info, unsigned long long size, char *name, char *homehost, int *uuid); | |
354 | void (*add_to_super)(void *sbv, mdu_disk_info_t *dinfo); | |
355 | int (*store_super)(struct supertype *st, int fd, void *sbv); | |
356 | int (*write_init_super)(struct supertype *st, void *sbv, mdu_disk_info_t *dinfo, char *devname); | |
357 | int (*compare_super)(void **firstp, void *secondv); | |
358 | int (*load_super)(struct supertype *st, int fd, void **sbp, char *devname); | |
359 | struct supertype * (*match_metadata_desc)(char *arg); | |
360 | __u64 (*avail_size)(struct supertype *st, __u64 size); | |
361 | int (*add_internal_bitmap)(struct supertype *st, void *sbv, int *chunkp, | |
362 | int delay, int write_behind, | |
363 | unsigned long long size, int may_change, int major); | |
364 | void (*locate_bitmap)(struct supertype *st, int fd, void *sbv); | |
365 | int (*write_bitmap)(struct supertype *st, int fd, void *sbv); | |
366 | int major; | |
367 | int swapuuid; /* true if uuid is bigending rather than hostendian */ | |
368 | } super0, super1, *superlist[]; | |
369 | ||
370 | struct supertype { | |
371 | struct superswitch *ss; | |
372 | int minor_version; | |
373 | int max_devs; | |
374 | }; | |
375 | ||
376 | extern struct supertype *super_by_version(int vers, int minor); | |
377 | extern struct supertype *guess_super(int fd); | |
378 | extern int get_dev_size(int fd, char *dname, unsigned long long *sizep); | |
379 | extern void get_one_disk(int mdfd, mdu_array_info_t *ainf, | |
380 | mdu_disk_info_t *disk); | |
381 | ||
382 | #if __GNUC__ < 3 | |
383 | struct stat64; | |
384 | #endif | |
385 | ||
386 | #define HAVE_NFTW we assume | |
387 | #define HAVE_FTW | |
388 | ||
389 | #ifdef UCLIBC | |
390 | # include <features.h> | |
391 | # ifndef __UCLIBC_HAS_FTW__ | |
392 | # undef HAVE_FTW | |
393 | # undef HAVE_NFTW | |
394 | # endif | |
395 | #endif | |
396 | ||
397 | #ifdef __dietlibc__ | |
398 | # undef HAVE_NFTW | |
399 | #endif | |
400 | ||
401 | #ifndef HAVE_NFTW | |
402 | # define FTW_PHYS 1 | |
403 | # ifndef HAVE_FTW | |
404 | struct FTW {}; | |
405 | # endif | |
406 | #endif | |
407 | ||
408 | #ifdef HAVE_FTW | |
409 | # include <ftw.h> | |
410 | #endif | |
411 | ||
412 | extern int add_dev(const char *name, const struct stat *stb, int flag, struct FTW *s); | |
413 | ||
414 | ||
415 | extern int Manage_ro(char *devname, int fd, int readonly); | |
416 | extern int Manage_runstop(char *devname, int fd, int runstop, int quiet); | |
417 | extern int Manage_resize(char *devname, int fd, long long size, int raid_disks); | |
418 | extern int Manage_reconfig(char *devname, int fd, int layout); | |
419 | extern int Manage_subdevs(char *devname, int fd, | |
420 | mddev_dev_t devlist, int verbose); | |
421 | extern int autodetect(void); | |
422 | extern int Grow_Add_device(char *devname, int fd, char *newdev); | |
423 | extern int Grow_addbitmap(char *devname, int fd, char *file, int chunk, int delay, int write_behind, int force); | |
424 | extern int Grow_reshape(char *devname, int fd, int quiet, char *backup_file, | |
425 | long long size, | |
426 | int level, int layout, int chunksize, int raid_disks); | |
427 | extern int Grow_restart(struct supertype *st, struct mdinfo *info, | |
428 | int *fdlist, int cnt, char *backup_file); | |
429 | ||
430 | ||
431 | extern int Assemble(struct supertype *st, char *mddev, int mdfd, | |
432 | mddev_ident_t ident, | |
433 | mddev_dev_t devlist, char *backup_file, | |
434 | int readonly, int runstop, | |
435 | char *update, char *homehost, | |
436 | int verbose, int force); | |
437 | ||
438 | extern int Build(char *mddev, int mdfd, int chunk, int level, int layout, | |
439 | int raiddisks, | |
440 | mddev_dev_t devlist, int assume_clean, | |
441 | char *bitmap_file, int bitmap_chunk, int write_behind, int delay, int verbose); | |
442 | ||
443 | ||
444 | extern int Create(struct supertype *st, char *mddev, int mdfd, | |
445 | int chunk, int level, int layout, unsigned long long size, int raiddisks, int sparedisks, | |
446 | char *name, char *homehost, int *uuid, | |
447 | int subdevs, mddev_dev_t devlist, | |
448 | int runstop, int verbose, int force, int assume_clean, | |
449 | char *bitmap_file, int bitmap_chunk, int write_behind, int delay); | |
450 | ||
451 | extern int Detail(char *dev, int brief, int export, int test, char *homehost); | |
452 | extern int Query(char *dev); | |
453 | extern int Examine(mddev_dev_t devlist, int brief, int scan, int SparcAdjust, | |
454 | struct supertype *forcest, char *homehost); | |
455 | extern int Monitor(mddev_dev_t devlist, | |
456 | char *mailaddr, char *alert_cmd, | |
457 | int period, int daemonise, int scan, int oneshot, | |
458 | int dosyslog, int test, char *pidfile); | |
459 | ||
460 | extern int Kill(char *dev, int force, int quiet); | |
461 | extern int Wait(char *dev); | |
462 | ||
463 | extern int Incremental(char *devname, int verbose, int runstop, | |
464 | struct supertype *st, char *homehost, int autof); | |
465 | extern void RebuildMap(void); | |
466 | extern int IncrementalScan(int verbose); | |
467 | ||
468 | extern int CreateBitmap(char *filename, int force, char uuid[16], | |
469 | unsigned long chunksize, unsigned long daemon_sleep, | |
470 | unsigned long write_behind, | |
471 | unsigned long long array_size, | |
472 | int major); | |
473 | extern int ExamineBitmap(char *filename, int brief, struct supertype *st); | |
474 | extern int bitmap_update_uuid(int fd, int *uuid, int swap); | |
475 | ||
476 | extern int md_get_version(int fd); | |
477 | extern int get_linux_version(void); | |
478 | extern int parse_uuid(char *str, int uuid[4]); | |
479 | extern int check_ext2(int fd, char *name); | |
480 | extern int check_reiser(int fd, char *name); | |
481 | extern int check_raid(int fd, char *name); | |
482 | ||
483 | extern int get_mdp_major(void); | |
484 | extern int dev_open(char *dev, int flags); | |
485 | extern int is_standard(char *dev, int *nump); | |
486 | ||
487 | extern int parse_auto(char *str, char *msg, int config); | |
488 | extern mddev_ident_t conf_get_ident(char *dev); | |
489 | extern mddev_dev_t conf_get_devs(void); | |
490 | extern int conf_test_dev(char *devname); | |
491 | extern struct createinfo *conf_get_create_info(void); | |
492 | extern void set_conffile(char *file); | |
493 | extern char *conf_get_mailaddr(void); | |
494 | extern char *conf_get_mailfrom(void); | |
495 | extern char *conf_get_program(void); | |
496 | extern char *conf_get_homehost(void); | |
497 | extern char *conf_line(FILE *file); | |
498 | extern char *conf_word(FILE *file, int allow_key); | |
499 | extern void free_line(char *line); | |
500 | extern int match_oneof(char *devices, char *devname); | |
501 | extern void uuid_from_super(int uuid[4], mdp_super_t *super); | |
502 | extern int same_uuid(int a[4], int b[4], int swapuuid); | |
503 | extern void copy_uuid(void *a, int b[4], int swapuuid); | |
504 | /* extern int compare_super(mdp_super_t *first, mdp_super_t *second);*/ | |
505 | extern unsigned long calc_csum(void *super, int bytes); | |
506 | extern int enough(int level, int raid_disks, int layout, int clean, | |
507 | char *avail, int avail_disks); | |
508 | extern int ask(char *mesg); | |
509 | extern unsigned long long get_component_size(int fd); | |
510 | extern void remove_partitions(int fd); | |
511 | ||
512 | ||
513 | extern char *human_size(long long bytes); | |
514 | char *human_size_brief(long long bytes); | |
515 | ||
516 | extern void put_md_name(char *name); | |
517 | extern char *get_md_name(int dev); | |
518 | ||
519 | extern char DefaultConfFile[]; | |
520 | ||
521 | extern int open_mddev(char *dev, int autof); | |
522 | extern int open_mddev_devnum(char *devname, int devnum, char *name, | |
523 | char *chosen_name); | |
524 | ||
525 | ||
526 | #define LEVEL_MULTIPATH (-4) | |
527 | #define LEVEL_LINEAR (-1) | |
528 | #define LEVEL_FAULTY (-5) | |
529 | ||
530 | ||
531 | /* faulty stuff */ | |
532 | ||
533 | #define WriteTransient 0 | |
534 | #define ReadTransient 1 | |
535 | #define WritePersistent 2 | |
536 | #define ReadPersistent 3 | |
537 | #define WriteAll 4 /* doesn't go to device */ | |
538 | #define ReadFixable 5 | |
539 | #define Modes 6 | |
540 | ||
541 | #define ClearErrors 31 | |
542 | #define ClearFaults 30 | |
543 | ||
544 | #define AllPersist 100 /* internal use only */ | |
545 | #define NoPersist 101 | |
546 | ||
547 | #define ModeMask 0x1f | |
548 | #define ModeShift 5 | |
549 | ||
550 | ||
551 | #ifdef __TINYC__ | |
552 | #undef minor | |
553 | #undef major | |
554 | #undef makedev | |
555 | #define minor(x) ((x)&0xff) | |
556 | #define major(x) (((x)>>8)&0xff) | |
557 | #define makedev(M,m) (((M)<<8) | (m)) | |
558 | #endif | |
559 | ||
560 | /* for raid5 */ | |
561 | #define ALGORITHM_LEFT_ASYMMETRIC 0 | |
562 | #define ALGORITHM_RIGHT_ASYMMETRIC 1 | |
563 | #define ALGORITHM_LEFT_SYMMETRIC 2 | |
564 | #define ALGORITHM_RIGHT_SYMMETRIC 3 |