Reduce openning of dev in create.
[thirdparty/mdadm.git] / mdadm.h
CommitLineData
64c4757e 1/*
9a9dab36 2 * mdadm - manage Linux "md" devices aka RAID arrays.
64c4757e 3 *
4f589ad0 4 * Copyright (C) 2001-2006 Neil Brown <neilb@suse.de>
64c4757e
NB
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
4ccdb956 30#define _GNU_SOURCE
c2c9bb6f 31#define _FILE_OFFSET_BITS 64
64c4757e 32#include <unistd.h>
e39b673e 33#if !defined(__dietlibc__) && !defined(__KLIBC__)
64c4757e 34extern __off64_t lseek64 __P ((int __fd, __off64_t __offset, int __whence));
f783ca4f 35#else
fffdbe5e 36# if defined(__NO_STAT64) || __WORDSIZE != 32
f783ca4f
NB
37# define lseek64 lseek
38# endif
98c6faba 39#endif
64c4757e
NB
40
41#include <sys/types.h>
42#include <sys/stat.h>
43#include <stdlib.h>
44#include <time.h>
11018a45 45#include <sys/time.h>
64c4757e
NB
46#include <getopt.h>
47#include <fcntl.h>
48#include <stdio.h>
49#include <errno.h>
50#include <string.h>
773135f5 51#include <syslog.h>
b56c3630
NB
52#ifdef __dietlibc__
53#include <strings.h>
280a927d
NB
54/* dietlibc has deprecated random and srandom!! */
55#define random rand
56#define srandom srand
98c6faba
NB
57#endif
58
64c4757e
NB
59
60#include <linux/kdev_t.h>
e0d19036
NB
61/*#include <linux/fs.h> */
62#include <sys/mount.h>
63#include <asm/types.h>
64c4757e
NB
64#include <sys/ioctl.h>
65#define MD_MAJOR 9
dd0781e5 66#define MdpMinorShift 6
64c4757e 67
e0d19036 68#ifndef BLKGETSIZE64
98c6faba 69#define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 *arg) */
e0d19036 70#endif
56eb10c0 71
c82f047c
NB
72#define DEFAULT_BITMAP_CHUNK 4096
73#define DEFAULT_BITMAP_DELAY 5
dfd4d8ee 74#define DEFAULT_MAX_WRITE_BEHIND 256
64c4757e
NB
75
76#include "md_u.h"
e0d19036 77#include "md_p.h"
c82f047c 78#include "bitmap.h"
64c4757e 79
1e0d770c 80#include <endian.h>
efd441d1
NB
81/* Redhat don't like to #include <asm/byteorder.h>, and
82 * some time include <linux/byteorder/xxx_endian.h> isn't enough,
83 * and there is no standard conversion function so... */
0ae03b8a
NB
84/* And dietlibc doesn't think byteswap is ok, so.. */
85/* #include <byteswap.h> */
86#define bswap_16(x) (((x) & 0x00ffU) << 8 | \
87 ((x) & 0xff00U) >> 8)
88#define bswap_32(x) (((x) & 0x000000ffU) << 24 | \
89 ((x) & 0xff000000U) >> 24 | \
90 ((x) & 0x0000ff00U) << 8 | \
91 ((x) & 0x00ff0000U) >> 8)
92#define bswap_64(x) (((x) & 0x00000000000000ffULL) << 56 | \
93 ((x) & 0xff00000000000000ULL) >> 56 | \
94 ((x) & 0x000000000000ff00ULL) << 40 | \
95 ((x) & 0x00ff000000000000ULL) >> 40 | \
96 ((x) & 0x0000000000ff0000ULL) << 24 | \
97 ((x) & 0x0000ff0000000000ULL) >> 24 | \
98 ((x) & 0x00000000ff000000ULL) << 8 | \
99 ((x) & 0x000000ff00000000ULL) >> 8)
100
e39b673e 101#if !defined(__KLIBC__)
efd441d1
NB
102#if BYTE_ORDER == LITTLE_ENDIAN
103#define __cpu_to_le16(_x) (_x)
104#define __cpu_to_le32(_x) (_x)
105#define __cpu_to_le64(_x) (_x)
106#define __le16_to_cpu(_x) (_x)
107#define __le32_to_cpu(_x) (_x)
108#define __le64_to_cpu(_x) (_x)
109#elif BYTE_ORDER == BIG_ENDIAN
110#define __cpu_to_le16(_x) bswap_16(_x)
111#define __cpu_to_le32(_x) bswap_32(_x)
112#define __cpu_to_le64(_x) bswap_64(_x)
113#define __le16_to_cpu(_x) bswap_16(_x)
114#define __le32_to_cpu(_x) bswap_32(_x)
115#define __le64_to_cpu(_x) bswap_64(_x)
1e0d770c
NB
116#else
117# error "unknown endianness."
118#endif
e39b673e 119#endif /* __KLIBC__ */
1e0d770c
NB
120
121
122
4b1ac34b
NB
123/* general information that might be extracted from a superblock */
124struct mdinfo {
125 mdu_array_info_t array;
126 mdu_disk_info_t disk;
127 __u64 events;
fbf8a0b7 128 int uuid[4];
31317663 129 char name[33];
353632d9
NB
130 unsigned long long data_offset;
131 unsigned long long component_size;
132 int reshape_active;
133 unsigned long long reshape_progress;
134 int new_level, delta_disks, new_layout, new_chunk;
06c7f68e 135 int errors;
7e0f6979
NB
136 int cache_size; /* size of raid456 stripe cache*/
137 int mismatch_cnt;
138 char text_version[50];
06c7f68e
NB
139
140 char sys_name[20];
7e0f6979 141 struct mdinfo *devs;
06c7f68e 142 struct mdinfo *next;
4b1ac34b
NB
143};
144
5bbb4842
NB
145struct createinfo {
146 int uid;
147 int gid;
148 int autof;
149 int mode;
38098016 150 int symlinks;
058574b1 151 struct supertype *supertype;
5bbb4842
NB
152};
153
9a9dab36 154#define Name "mdadm"
682c7051 155
e0d19036
NB
156enum mode {
157 ASSEMBLE=1,
158 BUILD,
159 CREATE,
160 MANAGE,
161 MISC,
162 MONITOR,
dd0781e5 163 GROW,
8382f19b 164 INCREMENTAL,
1f48664b 165 AUTODETECT,
e0d19036
NB
166};
167
64c4757e 168extern char short_options[];
024768c4 169extern char short_bitmap_options[];
c06487ce 170extern char short_bitmap_auto_options[];
64c4757e 171extern struct option long_options[];
56eedc1a 172extern char Version[], Usage[], Help[], OptionHelp[],
dd0781e5 173 Help_create[], Help_build[], Help_assemble[], Help_grow[],
8382f19b 174 Help_incr[],
e0d19036 175 Help_manage[], Help_misc[], Help_monitor[], Help_config[];
64c4757e 176
997aed5d
NB
177/* for option that don't have short equivilents, we assign arbitrary
178 * small numbers. '1' means an undecorated option, so we start at '2'.
179 */
180enum special_options {
181 AssumeClean = 2,
182 BitmapChunk,
183 WriteBehind,
184 ReAdd,
185 NoDegraded,
186 Sparc22,
187 BackupFile,
188 HomeHost,
589395d6 189 AutoHomeHost,
38098016 190 Symlinks,
1f48664b 191 AutoDetect,
997aed5d
NB
192};
193
64c4757e 194/* structures read from config file */
52826846
NB
195/* List of mddevice names and identifiers
196 * Identifiers can be:
197 * uuid=128-hex-uuid
198 * super-minor=decimal-minor-number-from-superblock
199 * devices=comma,separated,list,of,device,names,with,wildcards
200 *
201 * If multiple fields are present, the intersection of all matching
202 * devices is considered
203 */
98c6faba 204#define UnSet (0xfffe)
52826846 205typedef struct mddev_ident_s {
dd0781e5 206 char *devname;
aba69144 207
dd0781e5 208 int uuid_set;
3fa06e9d 209 int uuid[4];
947fd4dd 210 char name[33];
52826846 211
98c6faba 212 unsigned int super_minor;
52826846 213
dd0781e5 214 char *devices; /* comma separated list of device
52826846
NB
215 * names with wild cards
216 */
dd0781e5 217 int level;
98c6faba
NB
218 unsigned int raid_disks;
219 unsigned int spare_disks;
82d9eba6 220 struct supertype *st;
dd0781e5
NB
221 int autof; /* 1 for normal, 2 for partitioned */
222 char *spare_group;
7ef02d01 223 char *bitmap_file;
c82f047c 224 int bitmap_fd;
dd0781e5 225
52826846
NB
226 struct mddev_ident_s *next;
227} *mddev_ident_t;
64c4757e
NB
228
229/* List of device names - wildcards expanded */
230typedef struct mddev_dev_s {
231 char *devname;
cd29a5c8
NB
232 char disposition; /* 'a' for add, 'r' for remove, 'f' for fail.
233 * Not set for names read from .config
234 */
dfd4d8ee 235 char writemostly;
fe80f49b 236 char re_add;
811e6cbe 237 char used; /* set when used */
64c4757e
NB
238 struct mddev_dev_s *next;
239} *mddev_dev_t;
240
682c7051
NB
241typedef struct mapping {
242 char *name;
243 int num;
244} mapping_t;
245
e0d19036
NB
246
247struct mdstat_ent {
248 char *dev;
249 int devnum;
250 int active;
251 char *level;
252 char *pattern; /* U or up, _ for down */
253 int percent; /* -1 if no resync */
e5329c37 254 int resync; /* 1 if resync, 0 if recovery */
e0d19036
NB
255 struct mdstat_ent *next;
256};
257
22a88995 258extern struct mdstat_ent *mdstat_read(int hold, int start);
e0d19036 259extern void free_mdstat(struct mdstat_ent *ms);
dd0781e5 260extern void mdstat_wait(int seconds);
8382f19b
NB
261extern int mddev_busy(int devnum);
262
263struct map_ent {
264 struct map_ent *next;
265 int devnum;
266 int major,minor;
267 int uuid[4];
268 char *path;
269};
270extern int map_update(struct map_ent **mpp, int devnum, int major, int minor,
271 int uuid[4], char *path);
272extern struct map_ent *map_by_uuid(struct map_ent **map, int uuid[4]);
273extern void map_read(struct map_ent **melp);
274extern int map_write(struct map_ent *mel);
275extern void map_delete(struct map_ent **mapp, int devnum);
276extern void map_free(struct map_ent *map);
277extern void map_add(struct map_ent **melp,
278 int devnum, int major, int minor, int uuid[4], char *path);
e0d19036 279
e86c9dd6
NB
280/* various details can be requested */
281#define GET_LEVEL 1
282#define GET_LAYOUT 2
283#define GET_COMPONENT 4
284#define GET_CHUNK 8
758d3a8e 285#define GET_CACHE 16
37dfc3d6 286#define GET_MISMATCH 32
8382f19b 287#define GET_VERSION 64
e86c9dd6
NB
288
289#define GET_DEVS 1024 /* gets role, major, minor */
290#define GET_OFFSET 2048
291#define GET_SIZE 4096
292#define GET_STATE 8192
293#define GET_ERROR 16384
294
295/* If fd >= 0, get the array it is open on,
296 * else use devnum. >=0 -> major9. <0.....
297 */
7e0f6979
NB
298extern void sysfs_free(struct mdinfo *sra);
299extern struct mdinfo *sysfs_read(int fd, int devnum, unsigned long options);
300extern int sysfs_set_str(struct mdinfo *sra, struct mdinfo *dev,
e86c9dd6 301 char *name, char *val);
7e0f6979 302extern int sysfs_set_num(struct mdinfo *sra, struct mdinfo *dev,
e86c9dd6 303 char *name, unsigned long long val);
7e0f6979 304extern int sysfs_get_ll(struct mdinfo *sra, struct mdinfo *dev,
e86c9dd6
NB
305 char *name, unsigned long long *val);
306
307
308extern int save_stripes(int *source, unsigned long long *offsets,
309 int raid_disks, int chunk_size, int level, int layout,
310 int nwrites, int *dest,
311 unsigned long long start, unsigned long long length);
353632d9
NB
312extern int restore_stripes(int *dest, unsigned long long *offsets,
313 int raid_disks, int chunk_size, int level, int layout,
314 int source, unsigned long long read_offset,
315 unsigned long long start, unsigned long long length);
e86c9dd6 316
52826846
NB
317#ifndef Sendmail
318#define Sendmail "/usr/lib/sendmail -t"
319#endif
320
773135f5
NB
321#define SYSLOG_FACILITY LOG_DAEMON
322
682c7051
NB
323extern char *map_num(mapping_t *map, int num);
324extern int map_name(mapping_t *map, char *name);
b5e64645 325extern mapping_t r5layout[], pers[], modes[], faultylayout[];
682c7051 326
16c6fa80 327extern char *map_dev(int major, int minor, int create);
64c4757e
NB
328
329
f9ce90ba 330extern struct superswitch {
3da92f27
NB
331 void (*examine_super)(struct supertype *st, char *homehost);
332 void (*brief_examine_super)(struct supertype *st);
0d726f17 333 void (*export_examine_super)(struct supertype *st);
3da92f27 334 void (*detail_super)(struct supertype *st, char *homehost);
3da92f27 335 void (*brief_detail_super)(struct supertype *st);
0d726f17 336 void (*export_detail_super)(struct supertype *st);
3da92f27
NB
337 void (*uuid_from_super)(struct supertype *st, int uuid[4]);
338 void (*getinfo_super)(struct supertype *st, struct mdinfo *info);
339 int (*match_home)(struct supertype *st, char *homehost);
68c7d6d7 340 int (*update_super)(struct supertype *st, struct mdinfo *info,
3da92f27 341 char *update,
e5eac01f
NB
342 char *devname, int verbose,
343 int uuid_set, char *homehost);
3da92f27
NB
344 int (*init_super)(struct supertype *st, mdu_array_info_t *info,
345 unsigned long long size, char *name,
346 char *homehost, int *uuid);
347 void (*add_to_super)(struct supertype *st, mdu_disk_info_t *dinfo);
348 int (*store_super)(struct supertype *st, int fd);
349 int (*write_init_super)(struct supertype *st, mdu_disk_info_t *dinfo,
350 char *devname);
64557c33 351 int (*compare_super)(struct supertype *st, struct supertype *tst);
3da92f27 352 int (*load_super)(struct supertype *st, int fd, char *devname);
82d9eba6 353 struct supertype * (*match_metadata_desc)(char *arg);
1bf4e2d9 354 __u64 (*avail_size)(struct supertype *st, __u64 size);
3da92f27 355 int (*add_internal_bitmap)(struct supertype *st, int *chunkp,
199171a2 356 int delay, int write_behind,
f9c25f1d 357 unsigned long long size, int may_change, int major);
3da92f27
NB
358 void (*locate_bitmap)(struct supertype *st, int fd);
359 int (*write_bitmap)(struct supertype *st, int fd);
360 void (*free_super)(struct supertype *st);
17f25ca6
NB
361 int (*validate_geometry)(struct supertype *st, int level, int layout,
362 int raiddisks,
363 int chunk, unsigned long long size,
364 char *subdev, unsigned long long *freesize);
82d9eba6 365 int major;
f277ce36 366 int swapuuid; /* true if uuid is bigending rather than hostendian */
82d9eba6
NB
367} super0, super1, *superlist[];
368
369struct supertype {
370 struct superswitch *ss;
371 int minor_version;
ea329559 372 int max_devs;
64557c33 373 void *sb;
82d9eba6 374};
f9ce90ba 375
1686dc25 376extern struct supertype *super_by_fd(int fd);
82d9eba6 377extern struct supertype *guess_super(int fd);
3da92f27 378extern struct supertype *dup_super(struct supertype *st);
beae1dfe 379extern int get_dev_size(int fd, char *dname, unsigned long long *sizep);
8382f19b
NB
380extern void get_one_disk(int mdfd, mdu_array_info_t *ainf,
381 mdu_disk_info_t *disk);
f9ce90ba 382
838acbc2
NB
383#if __GNUC__ < 3
384struct stat64;
385#endif
386
45e878bb
NB
387#define HAVE_NFTW we assume
388#define HAVE_FTW
389
173fc515 390#ifdef UCLIBC
45e878bb
NB
391# include <features.h>
392# ifndef __UCLIBC_HAS_FTW__
393# undef HAVE_FTW
394# undef HAVE_NFTW
395# endif
396#endif
397
398#ifdef __dietlibc__
399# undef HAVE_NFTW
400#endif
401
e39b673e 402#if defined(__KLIBC__)
403# undef HAVE_NFTW
404# undef HAVE_FTW
405#endif
406
45e878bb 407#ifndef HAVE_NFTW
173fc515 408# define FTW_PHYS 1
45e878bb
NB
409# ifndef HAVE_FTW
410 struct FTW {};
173fc515
NB
411# endif
412#endif
413
45e878bb
NB
414#ifdef HAVE_FTW
415# include <ftw.h>
416#endif
417
173fc515
NB
418extern int add_dev(const char *name, const struct stat *stb, int flag, struct FTW *s);
419
f9ce90ba 420
64c4757e 421extern int Manage_ro(char *devname, int fd, int readonly);
91f068bf 422extern int Manage_runstop(char *devname, int fd, int runstop, int quiet);
dd0781e5 423extern int Manage_resize(char *devname, int fd, long long size, int raid_disks);
b5e64645 424extern int Manage_reconfig(char *devname, int fd, int layout);
64c4757e 425extern int Manage_subdevs(char *devname, int fd,
dab6685f 426 mddev_dev_t devlist, int verbose);
1f48664b 427extern int autodetect(void);
e5329c37 428extern int Grow_Add_device(char *devname, int fd, char *newdev);
8fac0577 429extern int Grow_addbitmap(char *devname, int fd, char *file, int chunk, int delay, int write_behind, int force);
06b0d786 430extern int Grow_reshape(char *devname, int fd, int quiet, char *backup_file,
e86c9dd6
NB
431 long long size,
432 int level, int layout, int chunksize, int raid_disks);
06b0d786
NB
433extern int Grow_restart(struct supertype *st, struct mdinfo *info,
434 int *fdlist, int cnt, char *backup_file);
64c4757e
NB
435
436
82d9eba6 437extern int Assemble(struct supertype *st, char *mddev, int mdfd,
52826846 438 mddev_ident_t ident,
06b0d786 439 mddev_dev_t devlist, char *backup_file,
64c4757e 440 int readonly, int runstop,
e5eac01f 441 char *update, char *homehost,
64c4757e
NB
442 int verbose, int force);
443
b5e64645 444extern int Build(char *mddev, int mdfd, int chunk, int level, int layout,
64c4757e 445 int raiddisks,
c82f047c 446 mddev_dev_t devlist, int assume_clean,
dab6685f 447 char *bitmap_file, int bitmap_chunk, int write_behind, int delay, int verbose);
64c4757e
NB
448
449
82d9eba6 450extern int Create(struct supertype *st, char *mddev, int mdfd,
5dd497ee 451 int chunk, int level, int layout, unsigned long long size, int raiddisks, int sparedisks,
3d3dd91e 452 char *name, char *homehost, int *uuid,
cd29a5c8 453 int subdevs, mddev_dev_t devlist,
47d79ef8 454 int runstop, int verbose, int force, int assume_clean,
dfd4d8ee 455 char *bitmap_file, int bitmap_chunk, int write_behind, int delay);
64c4757e 456
54bad364 457extern int Detail(char *dev, int brief, int export, int test, char *homehost);
e0d19036 458extern int Query(char *dev);
0d726f17
KS
459extern int Examine(mddev_dev_t devlist, int brief, int export, int scan,
460 int SparcAdjust, struct supertype *forcest, char *homehost);
cd29a5c8 461extern int Monitor(mddev_dev_t devlist,
e0d19036 462 char *mailaddr, char *alert_cmd,
aa88f531 463 int period, int daemonise, int scan, int oneshot,
8aec876d 464 int dosyslog, int test, char *pidfile);
64c4757e 465
6409687b 466extern int Kill(char *dev, int force, int quiet);
b90c0e9a 467extern int Wait(char *dev);
9a9dab36 468
8382f19b
NB
469extern int Incremental(char *devname, int verbose, int runstop,
470 struct supertype *st, char *homehost, int autof);
471extern void RebuildMap(void);
472extern int IncrementalScan(int verbose);
473
c82f047c
NB
474extern int CreateBitmap(char *filename, int force, char uuid[16],
475 unsigned long chunksize, unsigned long daemon_sleep,
dfd4d8ee 476 unsigned long write_behind,
dcec9ee5
NB
477 unsigned long long array_size,
478 int major);
55935d51 479extern int ExamineBitmap(char *filename, int brief, struct supertype *st);
bf4fb153 480extern int bitmap_update_uuid(int fd, int *uuid, int swap);
c82f047c 481
64c4757e 482extern int md_get_version(int fd);
e0d19036 483extern int get_linux_version(void);
64c4757e 484extern int parse_uuid(char *str, int uuid[4]);
682c7051
NB
485extern int check_ext2(int fd, char *name);
486extern int check_reiser(int fd, char *name);
487extern int check_raid(int fd, char *name);
64c4757e 488
dd0781e5 489extern int get_mdp_major(void);
8b0dabea 490extern int dev_open(char *dev, int flags);
8d80900b 491extern int is_standard(char *dev, int *nump);
dd0781e5 492
f1ae21c4 493extern int parse_auto(char *str, char *msg, int config);
8aec876d
NB
494extern mddev_ident_t conf_get_ident(char *dev);
495extern mddev_dev_t conf_get_devs(void);
8382f19b 496extern int conf_test_dev(char *devname);
8aec876d
NB
497extern struct createinfo *conf_get_create_info(void);
498extern void set_conffile(char *file);
499extern char *conf_get_mailaddr(void);
500extern char *conf_get_mailfrom(void);
501extern char *conf_get_program(void);
502extern char *conf_get_homehost(void);
e0d19036 503extern char *conf_line(FILE *file);
98c6faba 504extern char *conf_word(FILE *file, int allow_key);
e0d19036
NB
505extern void free_line(char *line);
506extern int match_oneof(char *devices, char *devname);
e0d19036 507extern void uuid_from_super(int uuid[4], mdp_super_t *super);
f277ce36 508extern int same_uuid(int a[4], int b[4], int swapuuid);
350f29f9 509extern void copy_uuid(void *a, int b[4], int swapuuid);
4b1ac34b 510extern unsigned long calc_csum(void *super, int bytes);
583315d9 511extern int enough(int level, int raid_disks, int layout, int clean,
265e0f17 512 char *avail, int avail_disks);
e0d19036 513extern int ask(char *mesg);
8fac0577 514extern unsigned long long get_component_size(int fd);
0430ed48 515extern void remove_partitions(int fd);
e0d19036 516
cd29a5c8 517
56eb10c0 518extern char *human_size(long long bytes);
e0d19036
NB
519char *human_size_brief(long long bytes);
520
63152c1b
NB
521#define NoMdDev (1<<23)
522extern int find_free_devnum(int use_partitions);
523
e0d19036
NB
524extern void put_md_name(char *name);
525extern char *get_md_name(int dev);
526
c913b90e 527extern char DefaultConfFile[];
b5e64645
NB
528
529extern int open_mddev(char *dev, int autof);
8382f19b 530extern int open_mddev_devnum(char *devname, int devnum, char *name,
9a02c62a 531 char *chosen_name, int parts);
b5e64645
NB
532
533
534#define LEVEL_MULTIPATH (-4)
535#define LEVEL_LINEAR (-1)
536#define LEVEL_FAULTY (-5)
537
17f25ca6
NB
538/* kernel module doesn't know about these */
539#define LEVEL_CONTAINER (-100)
540
b5e64645
NB
541
542/* faulty stuff */
543
544#define WriteTransient 0
545#define ReadTransient 1
546#define WritePersistent 2
547#define ReadPersistent 3
548#define WriteAll 4 /* doesn't go to device */
549#define ReadFixable 5
550#define Modes 6
551
552#define ClearErrors 31
553#define ClearFaults 30
554
555#define AllPersist 100 /* internal use only */
556#define NoPersist 101
557
558#define ModeMask 0x1f
559#define ModeShift 5
fe6729fa
NB
560
561
562#ifdef __TINYC__
563#undef minor
564#undef major
565#undef makedev
566#define minor(x) ((x)&0xff)
567#define major(x) (((x)>>8)&0xff)
568#define makedev(M,m) (((M)<<8) | (m))
569#endif
570
e86c9dd6
NB
571/* for raid5 */
572#define ALGORITHM_LEFT_ASYMMETRIC 0
573#define ALGORITHM_RIGHT_ASYMMETRIC 1
574#define ALGORITHM_LEFT_SYMMETRIC 2
575#define ALGORITHM_RIGHT_SYMMETRIC 3