130
181
unsigned long long data_offset;
131
unsigned long long component_size;
182
unsigned long long component_size; /* same as array.size, except in
183
* sectors and up to 64bits.
185
unsigned long long custom_array_size; /* size for non-default sized
186
* arrays (in sectors)
132
188
int reshape_active;
133
189
unsigned long long reshape_progress;
191
unsigned long long resync_start; /* per-array resync position */
192
unsigned long long recovery_start; /* per-device rebuild position */
193
#define MaxSector (~0ULL) /* resync/recovery complete position */
195
unsigned long safe_mode_delay; /* ms delay to mark clean */
134
196
int new_level, delta_disks, new_layout, new_chunk;
136
int cache_size; /* size of raid456 stripe cache*/
198
unsigned long cache_size; /* size of raid456 stripe cache*/
137
199
int mismatch_cnt;
138
200
char text_version[50];
201
void *update_private; /* for passing metadata-format
202
* specific update data
203
* between successive calls to
207
int container_member; /* for assembling external-metatdata arrays
208
* This is to be used internally by metadata
210
int container_enough; /* flag external handlers can set to
211
* indicate that subarrays have not enough (-1),
212
* enough to start (0), or all expected disks (1) */
140
213
char sys_name[20];
141
214
struct mdinfo *devs;
142
215
struct mdinfo *next;
217
/* Device info for mdmon: */
222
#define DS_WRITE_MOSTLY 4
224
#define DS_BLOCKED 16
225
#define DS_REMOVE 1024
226
#define DS_UNBLOCK 2048
227
int prev_state, curr_state, next_state;
145
231
struct createinfo {
252
356
char *pattern; /* U or up, _ for down */
253
357
int percent; /* -1 if no resync */
254
358
int resync; /* 1 if resync, 0 if recovery */
362
char * metadata_version;
365
struct dev_member *next;
255
367
struct mdstat_ent *next;
258
370
extern struct mdstat_ent *mdstat_read(int hold, int start);
259
371
extern void free_mdstat(struct mdstat_ent *ms);
260
372
extern void mdstat_wait(int seconds);
373
extern void mdstat_wait_fd(int fd, const sigset_t *sigmask);
261
374
extern int mddev_busy(int devnum);
375
extern struct mdstat_ent *mdstat_by_component(char *name);
264
378
struct map_ent *next;
270
extern int map_update(struct map_ent **mpp, int devnum, int major, int minor,
385
extern int map_update(struct map_ent **mpp, int devnum, char *metadata,
271
386
int uuid[4], char *path);
387
extern void map_remove(struct map_ent **map, int devnum);
272
388
extern struct map_ent *map_by_uuid(struct map_ent **map, int uuid[4]);
389
extern struct map_ent *map_by_devnum(struct map_ent **map, int devnum);
390
extern struct map_ent *map_by_name(struct map_ent **map, char *name);
273
391
extern void map_read(struct map_ent **melp);
274
392
extern int map_write(struct map_ent *mel);
275
393
extern void map_delete(struct map_ent **mapp, int devnum);
276
394
extern void map_free(struct map_ent *map);
277
395
extern void map_add(struct map_ent **melp,
278
int devnum, int major, int minor, int uuid[4], char *path);
396
int devnum, char *metadata, int uuid[4], char *path);
397
extern int map_lock(struct map_ent **melp);
398
extern void map_unlock(struct map_ent **melp);
280
400
/* various details can be requested */
283
#define GET_COMPONENT 4
286
#define GET_MISMATCH 32
287
#define GET_VERSION 64
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
401
enum sysfs_read_flags {
402
GET_LEVEL = (1 << 0),
403
GET_LAYOUT = (1 << 1),
404
GET_COMPONENT = (1 << 2),
405
GET_CHUNK = (1 << 3),
406
GET_CACHE = (1 << 4),
407
GET_MISMATCH = (1 << 5),
408
GET_VERSION = (1 << 6),
409
GET_DISKS = (1 << 7),
410
GET_DEGRADED = (1 << 8),
411
GET_SAFEMODE = (1 << 9),
412
GET_DEVS = (1 << 10), /* gets role, major, minor */
413
GET_OFFSET = (1 << 11),
414
GET_SIZE = (1 << 12),
415
GET_STATE = (1 << 13),
416
GET_ERROR = (1 << 14),
295
419
/* If fd >= 0, get the array it is open on,
296
420
* else use devnum. >=0 -> major9. <0.....
422
extern int sysfs_open(int devnum, char *devname, char *attr);
423
extern void sysfs_init(struct mdinfo *mdi, int fd, int devnum);
298
424
extern void sysfs_free(struct mdinfo *sra);
299
425
extern struct mdinfo *sysfs_read(int fd, int devnum, unsigned long options);
426
extern int sysfs_attr_match(const char *attr, const char *str);
427
extern int sysfs_match_word(const char *word, char **list);
300
428
extern int sysfs_set_str(struct mdinfo *sra, struct mdinfo *dev,
301
429
char *name, char *val);
302
430
extern int sysfs_set_num(struct mdinfo *sra, struct mdinfo *dev,
303
431
char *name, unsigned long long val);
432
extern int sysfs_uevent(struct mdinfo *sra, char *event);
433
extern int sysfs_get_fd(struct mdinfo *sra, struct mdinfo *dev,
435
extern int sysfs_fd_get_ll(int fd, unsigned long long *val);
304
436
extern int sysfs_get_ll(struct mdinfo *sra, struct mdinfo *dev,
305
437
char *name, unsigned long long *val);
438
extern int sysfs_fd_get_str(int fd, char *val, int size);
439
extern int sysfs_get_str(struct mdinfo *sra, struct mdinfo *dev,
440
char *name, char *val, int size);
441
extern int sysfs_set_safemode(struct mdinfo *sra, unsigned long ms);
442
extern int sysfs_set_array(struct mdinfo *info, int vers);
443
extern int sysfs_add_disk(struct mdinfo *sra, struct mdinfo *sd, int resume);
444
extern int sysfs_disk_to_scsi_id(int fd, __u32 *id);
445
extern int sysfs_unique_holder(int devnum, long rdev);
446
extern int load_sys(char *path, char *buf);
308
449
extern int save_stripes(int *source, unsigned long long *offsets,
309
450
int raid_disks, int chunk_size, int level, int layout,
310
451
int nwrites, int *dest,
311
unsigned long long start, unsigned long long length);
452
unsigned long long start, unsigned long long length,
312
454
extern int restore_stripes(int *dest, unsigned long long *offsets,
313
455
int raid_disks, int chunk_size, int level, int layout,
314
456
int source, unsigned long long read_offset,
323
465
extern char *map_num(mapping_t *map, int num);
324
466
extern int map_name(mapping_t *map, char *name);
325
extern mapping_t r5layout[], pers[], modes[], faultylayout[];
467
extern mapping_t r5layout[], r6layout[], pers[], modes[], faultylayout[];
327
469
extern char *map_dev(int major, int minor, int create);
472
struct metadata_update;
474
/* A superswitch provides entry point the a metadata handler.
476
* The super_switch primarily operates on some "metadata" that
477
* is accessed via the 'supertype'.
478
* This metadata has one of three possible sources.
479
* 1/ It is read from a single device. In this case it may not completely
480
* describe the array or arrays as some information might be on other
482
* 2/ It is read from all devices in a container. In this case all
483
* information is present.
484
* 3/ It is created by ->init_super / ->add_to_super. In this case it will
485
* be complete once enough ->add_to_super calls have completed.
487
* When creating an array inside a container, the metadata will be
488
* formed by a combination of 2 and 3. The metadata or the array is read,
489
* then new information is added.
491
* The metadata must sometimes have a concept of a 'current' array
492
* and a 'current' device.
493
* The 'current' array is set by init_super to be the newly created array,
494
* or is set by super_by_fd when it finds it is looking at an array inside
497
* The 'current' device is either the device that the metadata was read from
498
* in case 1, or the last device added by add_to_super in case 3.
499
* Case 2 does not identify a 'current' device.
330
501
extern struct superswitch {
503
/* Used to report details of metadata read from a component
504
* device. ->load_super has been called.
331
506
void (*examine_super)(struct supertype *st, char *homehost);
332
void (*brief_examine_super)(struct supertype *st);
507
void (*brief_examine_super)(struct supertype *st, int verbose);
508
void (*brief_examine_subarrays)(struct supertype *st, int verbose);
333
509
void (*export_examine_super)(struct supertype *st);
511
/* Used to report details of an active array.
512
* ->load_super was possibly given a 'component' string.
334
514
void (*detail_super)(struct supertype *st, char *homehost);
335
515
void (*brief_detail_super)(struct supertype *st);
336
516
void (*export_detail_super)(struct supertype *st);
518
/* Optional: platform hardware / firmware details */
519
int (*detail_platform)(int verbose, int enumerate_only);
522
* to get uuid to storing in bitmap metadata
523
* and 'reshape' backup-data metadata
524
* To see if a device is being re-added to an array it was part of.
337
526
void (*uuid_from_super)(struct supertype *st, int uuid[4]);
528
/* Extract generic details from metadata. This could be details about
529
* the container, or about an individual array within the container.
530
* The determination is made either by:
531
* load_super being given a 'component' string.
532
* validate_geometry determining what to create.
533
* The info includes both array information and device information.
534
* The particular device should be:
535
* The last device added by add_to_super
536
* The device the metadata was loaded from by load_super
338
538
void (*getinfo_super)(struct supertype *st, struct mdinfo *info);
540
/* Check if the given metadata is flagged as belonging to "this"
541
* host. 0 for 'no', 1 for 'yes', -1 for "Don't record homehost"
339
543
int (*match_home)(struct supertype *st, char *homehost);
545
/* Make one of several generic modifications to metadata
546
* prior to assembly (or other times).
547
* sparc2.2 - first bug in early 0.90 metadata
548
* super-minor - change name of 0.90 metadata
549
* summaries - 'correct' any redundant data
550
* resync - mark array as dirty to trigger a resync.
551
* uuid - set new uuid - only 0.90 or 1.x
552
* name - change the name of the array (where supported)
553
* homehost - change which host this array is tied to.
554
* devicesize - If metadata is at start of device, change recorded
555
* device size to match actual device size
556
* byteorder - swap bytes for 0.90 metadata
558
* force-one - mark that device as uptodate, not old or failed.
559
* force-array - mark array as clean if it would not otherwise
561
* assemble - not sure how this is different from force-one...
562
* linear-grow-new - add a new device to a linear array, but don't
563
* change the size: so superblock still matches
564
* linear-grow-update - now change the size of the array.
340
566
int (*update_super)(struct supertype *st, struct mdinfo *info,
342
568
char *devname, int verbose,
343
569
int uuid_set, char *homehost);
571
/* Create new metadata for new array as described. This could
572
* be a new container, or an array in a pre-existing container.
573
* Also used to zero metadata prior to writing it to invalidate old
344
576
int (*init_super)(struct supertype *st, mdu_array_info_t *info,
345
577
unsigned long long size, char *name,
346
578
char *homehost, int *uuid);
347
void (*add_to_super)(struct supertype *st, mdu_disk_info_t *dinfo);
580
/* update the metadata to include new device, either at create or
581
* when hot-adding a spare.
583
int (*add_to_super)(struct supertype *st, mdu_disk_info_t *dinfo,
584
int fd, char *devname);
586
/* Write metadata to one device when fixing problems or adding
348
589
int (*store_super)(struct supertype *st, int fd);
349
int (*write_init_super)(struct supertype *st, mdu_disk_info_t *dinfo,
591
/* Write all metadata for this array.
593
int (*write_init_super)(struct supertype *st);
351
594
int (*compare_super)(struct supertype *st, struct supertype *tst);
352
595
int (*load_super)(struct supertype *st, int fd, char *devname);
353
596
struct supertype * (*match_metadata_desc)(char *arg);
358
601
void (*locate_bitmap)(struct supertype *st, int fd);
359
602
int (*write_bitmap)(struct supertype *st, int fd);
360
603
void (*free_super)(struct supertype *st);
605
/* validate_geometry is called with an st returned by
606
* match_metadata_desc.
607
* It should check that the geometry described in compatible with
608
* the metadata type. It will be called repeatedly as devices
609
* added to validate changing size and new devices. If there are
610
* inter-device dependencies, it should record sufficient details
611
* so these can be validated.
612
* Both 'size' and '*freesize' are in sectors. chunk is bytes.
614
int (*validate_geometry)(struct supertype *st, int level, int layout,
616
int chunk, unsigned long long size,
617
char *subdev, unsigned long long *freesize,
620
struct mdinfo *(*container_content)(struct supertype *st);
621
/* Allow a metadata handler to override mdadm's default layouts */
622
int (*default_layout)(int level); /* optional */
623
/* query the supertype for default chunk size */
624
int (*default_chunk)(struct supertype *st); /* optional */
625
/* Permit subarray's to be deleted from inactive containers */
626
int (*kill_subarray)(struct supertype *st); /* optional */
627
/* Permit subarray's to be modified */
628
int (*update_subarray)(struct supertype *st, char *update, mddev_ident_t ident); /* optional */
631
int (*open_new)(struct supertype *c, struct active_array *a,
634
/* Tell the metadata handler the current state of the array.
635
* This covers whether it is known to be consistent (no pending writes)
636
* and how far along a resync is known to have progressed
637
* (in a->resync_start).
638
* resync status is really irrelevant if the array is not consistent,
639
* but some metadata (DDF!) have a place to record the distinction.
640
* If 'consistent' is '2', then the array can mark it dirty if a
641
* resync/recovery/whatever is required, or leave it clean if not.
642
* Return value is 0 dirty (not consistent) and 1 if clean.
643
* it is only really important if consistent is passed in as '2'.
645
int (*set_array_state)(struct active_array *a, int consistent);
647
/* When the state of a device might have changed, we call set_disk to
648
* tell the metadata what the current state is.
649
* Typically this happens on spare->in_sync and (spare|in_sync)->faulty
651
* set_disk might be called when the state of the particular disk has
652
* not in fact changed.
654
void (*set_disk)(struct active_array *a, int n, int state);
655
void (*sync_metadata)(struct supertype *st);
656
void (*process_update)(struct supertype *st,
657
struct metadata_update *update);
658
void (*prepare_update)(struct supertype *st,
659
struct metadata_update *update);
661
/* activate_spare will check if the array is degraded and, if it
662
* is, try to find some spare space in the container.
663
* On success, it add appropriate updates (For process_update) to
664
* to the 'updates' list and returns a list of 'mdinfo' identifying
665
* the device, or devices as there might be multiple missing
666
* devices and multiple spares available.
668
struct mdinfo *(*activate_spare)(struct active_array *a,
669
struct metadata_update **updates);
362
671
int swapuuid; /* true if uuid is bigending rather than hostendian */
363
} super0, super1, *superlist[];
673
const char *name; /* canonical metadata name */
674
} super0, super1, super_ddf, *superlist[];
676
extern struct superswitch super_imsm;
678
struct metadata_update {
681
void *space; /* allocated space that monitor will use */
682
struct metadata_update *next;
685
/* A supertype holds a particular collection of metadata.
686
* It identifies the metadata type by the superswitch, and the particular
687
* sub-version of that metadata type.
688
* metadata read in or created is stored in 'sb' and 'info'.
689
* There are also fields used by mdmon to track containers.
691
* A supertype may refer to:
692
* Just an array, possibly in a container
693
* A container, not identifying any particular array
694
* Info read from just one device, not yet fully describing the array/container.
697
* A supertype is created by:
365
702
struct supertype {
366
703
struct superswitch *ss;
367
704
int minor_version;
706
int container_dev; /* devnum of container */
707
char subarray[32]; /* name of array inside container */
710
int loaded_container; /* Set if load_super found a container,
711
* not just one device */
713
struct metadata_update *updates;
714
struct metadata_update **update_tail;
716
/* extra stuff used by mdmon */
717
struct active_array *arrays;
718
int sock; /* listen to external programs */
720
char *devname; /* e.g. md0. This appears in metadata_verison:
372
729
extern struct supertype *super_by_fd(int fd);
417
778
extern int Manage_ro(char *devname, int fd, int readonly);
418
779
extern int Manage_runstop(char *devname, int fd, int runstop, int quiet);
419
780
extern int Manage_resize(char *devname, int fd, long long size, int raid_disks);
420
extern int Manage_reconfig(char *devname, int fd, int layout);
421
781
extern int Manage_subdevs(char *devname, int fd,
422
mddev_dev_t devlist, int verbose);
782
mddev_dev_t devlist, int verbose, int test);
423
783
extern int autodetect(void);
424
784
extern int Grow_Add_device(char *devname, int fd, char *newdev);
425
785
extern int Grow_addbitmap(char *devname, int fd, char *file, int chunk, int delay, int write_behind, int force);
426
786
extern int Grow_reshape(char *devname, int fd, int quiet, char *backup_file,
428
int level, int layout, int chunksize, int raid_disks);
788
int level, char *layout_str, int chunksize, int raid_disks);
429
789
extern int Grow_restart(struct supertype *st, struct mdinfo *info,
430
int *fdlist, int cnt, char *backup_file);
433
extern int Assemble(struct supertype *st, char *mddev, int mdfd,
790
int *fdlist, int cnt, char *backup_file, int verbose);
791
extern int Grow_continue(int mdfd, struct supertype *st,
792
struct mdinfo *info, char *backup_file);
794
extern int Assemble(struct supertype *st, char *mddev,
434
795
mddev_ident_t ident,
435
796
mddev_dev_t devlist, char *backup_file,
436
797
int readonly, int runstop,
437
char *update, char *homehost,
798
char *update, char *homehost, int require_homehost,
438
799
int verbose, int force);
440
extern int Build(char *mddev, int mdfd, int chunk, int level, int layout,
442
mddev_dev_t devlist, int assume_clean,
443
char *bitmap_file, int bitmap_chunk, int write_behind, int delay, int verbose);
446
extern int Create(struct supertype *st, char *mddev, int mdfd,
801
extern int Build(char *mddev, int chunk, int level, int layout,
802
int raiddisks, mddev_dev_t devlist, int assume_clean,
803
char *bitmap_file, int bitmap_chunk, int write_behind,
804
int delay, int verbose, int autof, unsigned long long size);
807
extern int Create(struct supertype *st, char *mddev,
447
808
int chunk, int level, int layout, unsigned long long size, int raiddisks, int sparedisks,
448
809
char *name, char *homehost, int *uuid,
449
810
int subdevs, mddev_dev_t devlist,
450
811
int runstop, int verbose, int force, int assume_clean,
451
char *bitmap_file, int bitmap_chunk, int write_behind, int delay);
812
char *bitmap_file, int bitmap_chunk, int write_behind, int delay, int autof);
453
814
extern int Detail(char *dev, int brief, int export, int test, char *homehost);
815
extern int Detail_Platform(struct superswitch *ss, int scan, int verbose);
454
816
extern int Query(char *dev);
455
817
extern int Examine(mddev_dev_t devlist, int brief, int export, int scan,
456
818
int SparcAdjust, struct supertype *forcest, char *homehost);
457
819
extern int Monitor(mddev_dev_t devlist,
458
820
char *mailaddr, char *alert_cmd,
459
821
int period, int daemonise, int scan, int oneshot,
460
int dosyslog, int test, char *pidfile);
822
int dosyslog, int test, char *pidfile, int increments);
462
extern int Kill(char *dev, int force, int quiet);
824
extern int Kill(char *dev, struct supertype *st, int force, int quiet, int noexcl);
825
extern int Kill_subarray(char *dev, char *subarray, int quiet);
826
extern int Update_subarray(char *dev, char *subarray, char *update, mddev_ident_t ident, int quiet);
463
827
extern int Wait(char *dev);
828
extern int WaitClean(char *dev, int sock, int verbose);
465
830
extern int Incremental(char *devname, int verbose, int runstop,
466
struct supertype *st, char *homehost, int autof);
831
struct supertype *st, char *homehost, int require_homehost,
833
extern int Incremental_container(struct supertype *st, char *devname,
834
int verbose, int runstop, int autof,
467
836
extern void RebuildMap(void);
468
837
extern int IncrementalScan(int verbose);
838
extern int IncrementalRemove(char *devname, int verbose);
470
839
extern int CreateBitmap(char *filename, int force, char uuid[16],
471
840
unsigned long chunksize, unsigned long daemon_sleep,
472
841
unsigned long write_behind,
479
848
extern int md_get_version(int fd);
480
849
extern int get_linux_version(void);
850
extern long long parse_size(char *size);
481
851
extern int parse_uuid(char *str, int uuid[4]);
852
extern int parse_layout_10(char *layout);
853
extern int parse_layout_faulty(char *layout);
482
854
extern int check_ext2(int fd, char *name);
483
855
extern int check_reiser(int fd, char *name);
484
856
extern int check_raid(int fd, char *name);
857
extern int check_partitions(int fd, char *dname, unsigned long long freesize);
486
859
extern int get_mdp_major(void);
487
860
extern int dev_open(char *dev, int flags);
861
extern int open_dev(int devnum);
862
extern int open_dev_excl(int devnum);
488
863
extern int is_standard(char *dev, int *nump);
864
extern int same_dev(char *one, char *two);
490
866
extern int parse_auto(char *str, char *msg, int config);
491
867
extern mddev_ident_t conf_get_ident(char *dev);
492
868
extern mddev_dev_t conf_get_devs(void);
493
869
extern int conf_test_dev(char *devname);
870
extern int conf_test_metadata(const char *version, int is_homehost);
494
871
extern struct createinfo *conf_get_create_info(void);
495
872
extern void set_conffile(char *file);
496
873
extern char *conf_get_mailaddr(void);
497
874
extern char *conf_get_mailfrom(void);
498
875
extern char *conf_get_program(void);
499
extern char *conf_get_homehost(void);
876
extern char *conf_get_homehost(int *require_homehostp);
500
877
extern char *conf_line(FILE *file);
501
878
extern char *conf_word(FILE *file, int allow_key);
879
extern int conf_name_is_free(char *name);
880
extern int devname_matches(char *name, char *match);
881
extern struct mddev_ident_s *conf_match(struct mdinfo *info, struct supertype *st);
502
883
extern void free_line(char *line);
503
884
extern int match_oneof(char *devices, char *devname);
504
885
extern void uuid_from_super(int uuid[4], mdp_super_t *super);
886
extern const int uuid_match_any[4];
505
887
extern int same_uuid(int a[4], int b[4], int swapuuid);
506
888
extern void copy_uuid(void *a, int b[4], int swapuuid);
889
extern char *__fname_from_uuid(int id[4], int swap, char *buf, char sep);
890
extern char *fname_from_uuid(struct supertype *st,
891
struct mdinfo *info, char *buf, char sep);
507
892
extern unsigned long calc_csum(void *super, int bytes);
508
893
extern int enough(int level, int raid_disks, int layout, int clean,
509
894
char *avail, int avail_disks);
510
895
extern int ask(char *mesg);
511
896
extern unsigned long long get_component_size(int fd);
512
897
extern void remove_partitions(int fd);
898
extern int test_partition(int fd);
899
extern unsigned long long calc_array_size(int level, int raid_disks, int layout,
900
int chunksize, unsigned long long devsize);
901
extern int flush_metadata_updates(struct supertype *st);
902
extern void append_metadata_update(struct supertype *st, void *buf, int len);
903
extern int assemble_container_content(struct supertype *st, int mdfd,
904
struct mdinfo *content, int runstop,
905
char *chosen_name, int verbose);
907
extern int add_disk(int mdfd, struct supertype *st,
908
struct mdinfo *sra, struct mdinfo *info);
909
extern int set_array_info(int mdfd, struct supertype *st, struct mdinfo *info);
910
unsigned long long min_recovery_start(struct mdinfo *array);
515
912
extern char *human_size(long long bytes);
516
char *human_size_brief(long long bytes);
913
extern char *human_size_brief(long long bytes);
914
extern void print_r10_layout(int layout);
518
916
#define NoMdDev (1<<23)
519
917
extern int find_free_devnum(int use_partitions);
524
922
extern char DefaultConfFile[];
526
extern int open_mddev(char *dev, int autof);
527
extern int open_mddev_devnum(char *devname, int devnum, char *name,
528
char *chosen_name, int parts);
924
extern int create_mddev(char *dev, char *name, int autof, int trustworthy,
926
/* values for 'trustworthy' */
931
extern int open_mddev(char *dev, int report_errors);
932
extern int open_container(int fd);
933
extern int is_container_member(struct mdstat_ent *ent, char *devname);
934
extern int is_subarray_active(char *subarray, char *devname);
935
int is_container_active(char *devname);
936
extern int open_subarray(char *dev, struct supertype *st, int quiet);
937
extern struct superswitch *version_to_superswitch(char *vers);
939
extern int mdmon_running(int devnum);
940
extern int mdmon_pid(int devnum);
941
extern int check_env(char *name);
942
extern __u32 random32(void);
943
extern int start_mdmon(int devnum);
945
extern char *devnum2devname(int num);
946
extern int devname2devnum(char *name);
947
extern int stat2devnum(struct stat *st);
948
extern int fd2devnum(int fd);
950
static inline int dev2major(int d)
955
return get_mdp_major();
958
static inline int dev2minor(int d)
962
return (-1-d) << MdpMinorShift;
965
static inline int ROUND_UP(int a, int base)
967
return ((a+base-1)/base)*base;
970
static inline int is_subarray(char *vers)
972
/* The version string for a 'subarray' (an array in a container)
974
* /containername/componentname for normal read-write arrays
975
* -containername/componentname for read-only arrays.
976
* containername is e.g. md0, md_d1
977
* componentname is dependant on the metadata. e.g. '1' 'S1' ...
979
return (*vers == '/' || *vers == '-');
983
#define dprintf(fmt, arg...) \
984
fprintf(stderr, fmt, ##arg)
986
#define dprintf(fmt, arg...) \
987
({ if (0) fprintf(stderr, fmt, ##arg); 0; })
991
static inline int xasprintf(char **strp, const char *fmt, ...) {
995
ret = vasprintf(strp, fmt, ap);
531
1001
#define LEVEL_MULTIPATH (-4)
532
1002
#define LEVEL_LINEAR (-1)
533
1003
#define LEVEL_FAULTY (-5)
1005
/* kernel module doesn't know about these */
1006
#define LEVEL_CONTAINER (-100)
1007
#define LEVEL_UNSUPPORTED (-200)
536
1010
/* faulty stuff */
562
1036
#define makedev(M,m) (((M)<<8) | (m))
566
1040
#define ALGORITHM_LEFT_ASYMMETRIC 0
567
1041
#define ALGORITHM_RIGHT_ASYMMETRIC 1
568
1042
#define ALGORITHM_LEFT_SYMMETRIC 2
569
1043
#define ALGORITHM_RIGHT_SYMMETRIC 3
1045
/* Define non-rotating (raid4) algorithms. These allow
1046
* conversion of raid4 to raid5.
1048
#define ALGORITHM_PARITY_0 4 /* P or P,Q are initial devices */
1049
#define ALGORITHM_PARITY_N 5 /* P or P,Q are final devices. */
1051
/* DDF RAID6 layouts differ from md/raid6 layouts in two ways.
1052
* Firstly, the exact positioning of the parity block is slightly
1053
* different between the 'LEFT_*' modes of md and the "_N_*" modes
1055
* Secondly, or order of datablocks over which the Q syndrome is computed
1057
* Consequently we have different layouts for DDF/raid6 than md/raid6.
1058
* These layouts are from the DDFv1.2 spec.
1059
* Interestingly DDFv1.2-Errata-A does not specify N_CONTINUE but
1060
* leaves RLQ=3 as 'Vendor Specific'
1063
#define ALGORITHM_ROTATING_ZERO_RESTART 8 /* DDF PRL=6 RLQ=1 */
1064
#define ALGORITHM_ROTATING_N_RESTART 9 /* DDF PRL=6 RLQ=2 */
1065
#define ALGORITHM_ROTATING_N_CONTINUE 10 /*DDF PRL=6 RLQ=3 */
1068
/* For every RAID5 algorithm we define a RAID6 algorithm
1069
* with exactly the same layout for data and parity, and
1070
* with the Q block always on the last device (N-1).
1071
* This allows trivial conversion from RAID5 to RAID6
1073
#define ALGORITHM_LEFT_ASYMMETRIC_6 16
1074
#define ALGORITHM_RIGHT_ASYMMETRIC_6 17
1075
#define ALGORITHM_LEFT_SYMMETRIC_6 18
1076
#define ALGORITHM_RIGHT_SYMMETRIC_6 19
1077
#define ALGORITHM_PARITY_0_6 20
1078
#define ALGORITHM_PARITY_N_6 ALGORITHM_PARITY_N
1080
/* Define PATH_MAX in case we don't use glibc or standard library does
1081
* not have PATH_MAX defined. Assume max path length is 4K characters.
1084
#define PATH_MAX 4096