/*
* mdadm - manage Linux "md" devices aka RAID arrays.
*
- * Copyright (C) 2001-2006 Neil Brown <neilb@suse.de>
+ * Copyright (C) 2001-2009 Neil Brown <neilb@suse.de>
*
*
* This program is free software; you can redistribute it and/or modify
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Author: Neil Brown
- * Email: <neilb@cse.unsw.edu.au>
- * Paper: Neil Brown
- * School of Computer Science and Engineering
- * The University of New South Wales
- * Sydney, 2052
- * Australia
+ * Email: <neilb@suse.de>
*/
#define _GNU_SOURCE
#define DEFAULT_BITMAP_DELAY 5
#define DEFAULT_MAX_WRITE_BEHIND 256
+/* MAP_DIR should be somewhere that persists across the pivotroot
+ * from early boot to late boot.
+ * Currently /dev seems to be the only option on most distros.
+ */
+#ifndef MAP_DIR
+#define MAP_DIR "/dev/.mdadm"
+#endif /* MAP_DIR */
+/* MAP_FILE is what we name the map file we put in MAP_DIR, in case you
+ * want something other than the default of "map"
+ */
+#ifndef MAP_FILE
+#define MAP_FILE "map"
+#endif /* MAP_FILE */
+/* MDMON_DIR is where pid and socket files used for communicating
+ * with mdmon normally live. It *should* be /var/run, but when
+ * mdmon is needed at early boot then it needs to write there prior
+ * to /var/run being mounted read/write, and it also then needs to
+ * persist beyond when /var/run is mounter read-only. So, to be
+ * safe, the default is somewhere that is read/write early in the
+ * boot process and stays up as long as possible during shutdown.
+ */
+#ifndef MDMON_DIR
+#define MDMON_DIR "/dev/.mdadm/"
+#endif /* MDMON_DIR */
+
#include "md_u.h"
#include "md_p.h"
#include "bitmap.h"
#endif /* __KLIBC__ */
+/*
+ * min()/max()/clamp() macros that also do
+ * strict type-checking.. See the
+ * "unnecessary" pointer comparison.
+ */
+#define min(x, y) ({ \
+ typeof(x) _min1 = (x); \
+ typeof(y) _min2 = (y); \
+ (void) (&_min1 == &_min2); \
+ _min1 < _min2 ? _min1 : _min2; })
+
+#define max(x, y) ({ \
+ typeof(x) _max1 = (x); \
+ typeof(y) _max2 = (y); \
+ (void) (&_max1 == &_max2); \
+ _max1 > _max2 ? _max1 : _max2; })
/* general information that might be extracted from a superblock */
struct mdinfo {
unsigned long long component_size; /* same as array.size, except in
* sectors and up to 64bits.
*/
+ unsigned long long custom_array_size; /* size for non-default sized
+ * arrays (in sectors)
+ */
int reshape_active;
unsigned long long reshape_progress;
- unsigned long long resync_start;
+ union {
+ unsigned long long resync_start; /* per-array resync position */
+ unsigned long long recovery_start; /* per-device rebuild position */
+ #define MaxSector (~0ULL) /* resync/recovery complete position */
+ };
unsigned long safe_mode_delay; /* ms delay to mark clean */
int new_level, delta_disks, new_layout, new_chunk;
int errors;
- int cache_size; /* size of raid456 stripe cache*/
+ unsigned long cache_size; /* size of raid456 stripe cache*/
int mismatch_cnt;
char text_version[50];
+ void *update_private; /* for passing metadata-format
+ * specific update data
+ * between successive calls to
+ * update_super()
+ */
int container_member; /* for assembling external-metatdata arrays
* This is to be used internally by metadata
* handler only */
-
+ int container_enough; /* flag external handlers can set to
+ * indicate that subarrays have not enough (-1),
+ * enough to start (0), or all expected disks (1) */
char sys_name[20];
struct mdinfo *devs;
struct mdinfo *next;
/* Device info for mdmon: */
+ int recovery_fd;
int state_fd;
#define DS_FAULTY 1
#define DS_INSYNC 2
/* for option that don't have short equivilents, we assign arbitrary
* small numbers. '1' means an undecorated option, so we start at '2'.
+ * (note we must stop before we get to 65 i.e. 'A')
*/
enum special_options {
AssumeClean = 2,
ReAdd,
NoDegraded,
Sparc22,
- BackupFile,
+ BackupFile, /* 8 */
HomeHost,
AutoHomeHost,
Symlinks,
AutoDetect,
Waitclean,
DetailPlatform,
+ KillSubarray,
+ UpdateSubarray, /* 16 */
};
/* structures read from config file */
int uuid[4];
char name[33];
- unsigned int super_minor;
+ int super_minor;
char *devices; /* comma separated list of device
* names with wild cards
*/
int level;
- unsigned int raid_disks;
- unsigned int spare_disks;
+ int raid_disks;
+ int spare_disks;
struct supertype *st;
int autof; /* 1 for normal, 2 for partitioned */
char *spare_group;
char *member; /* subarray within a container */
struct mddev_ident_s *next;
+ union {
+ /* fields needed by different users of this structure */
+ int assembled; /* set when assembly succeeds */
+ };
} *mddev_ident_t;
/* List of device names - wildcards expanded */
int raid_disks;
int chunk_size;
char * metadata_version;
+ struct dev_member {
+ char *name;
+ struct dev_member *next;
+ } *members;
struct mdstat_ent *next;
};
extern void mdstat_wait(int seconds);
extern void mdstat_wait_fd(int fd, const sigset_t *sigmask);
extern int mddev_busy(int devnum);
+extern struct mdstat_ent *mdstat_by_component(char *name);
struct map_ent {
struct map_ent *next;
};
extern int map_update(struct map_ent **mpp, int devnum, char *metadata,
int uuid[4], char *path);
+extern void map_remove(struct map_ent **map, int devnum);
extern struct map_ent *map_by_uuid(struct map_ent **map, int uuid[4]);
extern struct map_ent *map_by_devnum(struct map_ent **map, int devnum);
extern struct map_ent *map_by_name(struct map_ent **map, char *name);
GET_SIZE = (1 << 12),
GET_STATE = (1 << 13),
GET_ERROR = (1 << 14),
- SKIP_GONE_DEVS = (1 << 15),
};
/* If fd >= 0, get the array it is open on,
extern int sysfs_set_num(struct mdinfo *sra, struct mdinfo *dev,
char *name, unsigned long long val);
extern int sysfs_uevent(struct mdinfo *sra, char *event);
+extern int sysfs_get_fd(struct mdinfo *sra, struct mdinfo *dev,
+ char *name);
+extern int sysfs_fd_get_ll(int fd, unsigned long long *val);
extern int sysfs_get_ll(struct mdinfo *sra, struct mdinfo *dev,
char *name, unsigned long long *val);
+extern int sysfs_fd_get_str(int fd, char *val, int size);
extern int sysfs_get_str(struct mdinfo *sra, struct mdinfo *dev,
char *name, char *val, int size);
extern int sysfs_set_safemode(struct mdinfo *sra, unsigned long ms);
extern int sysfs_set_array(struct mdinfo *info, int vers);
-extern int sysfs_add_disk(struct mdinfo *sra, struct mdinfo *sd,
- int in_sync);
+extern int sysfs_add_disk(struct mdinfo *sra, struct mdinfo *sd, int resume);
extern int sysfs_disk_to_scsi_id(int fd, __u32 *id);
extern int sysfs_unique_holder(int devnum, long rdev);
extern int load_sys(char *path, char *buf);
extern int save_stripes(int *source, unsigned long long *offsets,
int raid_disks, int chunk_size, int level, int layout,
int nwrites, int *dest,
- unsigned long long start, unsigned long long length);
+ unsigned long long start, unsigned long long length,
+ char *buf);
extern int restore_stripes(int *dest, unsigned long long *offsets,
int raid_disks, int chunk_size, int level, int layout,
int source, unsigned long long read_offset,
* device. ->load_super has been called.
*/
void (*examine_super)(struct supertype *st, char *homehost);
- void (*brief_examine_super)(struct supertype *st);
+ void (*brief_examine_super)(struct supertype *st, int verbose);
+ void (*brief_examine_subarrays)(struct supertype *st, int verbose);
void (*export_examine_super)(struct supertype *st);
/* Used to report details of an active array.
struct mdinfo *(*container_content)(struct supertype *st);
/* Allow a metadata handler to override mdadm's default layouts */
int (*default_layout)(int level); /* optional */
+ /* query the supertype for default chunk size */
+ int (*default_chunk)(struct supertype *st); /* optional */
+ /* Permit subarray's to be deleted from inactive containers */
+ int (*kill_subarray)(struct supertype *st); /* optional */
+ /* Permit subarray's to be modified */
+ int (*update_subarray)(struct supertype *st, char *update, mddev_ident_t ident); /* optional */
/* for mdmon */
int (*open_new)(struct supertype *c, struct active_array *a,
int swapuuid; /* true if uuid is bigending rather than hostendian */
int external;
const char *name; /* canonical metadata name */
-} super0, super1, super_ddf, *superlist[];
+} *superlist[];
-extern struct superswitch super_imsm;
+extern struct superswitch super0, super1;
+extern struct superswitch super_imsm, super_ddf;
+extern struct superswitch mbr, gpt;
struct metadata_update {
int len;
mdu_disk_info_t *disk);
void wait_for(char *dev, int fd);
+/*
+ * Data structures for policy management.
+ * Each device can have a policy structure that lists
+ * various name/value pairs each possibly with a metadata associated.
+ * The policy list is sorted by name/value/metadata
+ */
+struct dev_policy {
+ struct dev_policy *next;
+ char *name; /* None of these strings are allocated. They are
+ * all just references to strings which are known
+ * to exist elsewhere.
+ * name and metadata can be compared by address equality.
+ */
+ const char *metadata;
+ char *value;
+};
+
+extern char pol_act[], pol_domain[], pol_metadata[];
+
+/* iterate over the sublist starting at list, having the same
+ * 'name' as 'list', and matching the given metadata (Where
+ * NULL matches anything
+ */
+#define pol_for_each(item, list, _metadata) \
+ for (item = list; \
+ item && item->name == list->name; \
+ item = item->next) \
+ if (!(!_metadata || !item->metadata || _metadata == item->metadata)) \
+ ; else
+
+/*
+ * policy records read from mdadm are largely just name-value pairs.
+ * The names are constants, not strdupped
+ */
+struct pol_rule {
+ struct pol_rule *next;
+ char *type; /* rule_policy or rule_part */
+ struct rule {
+ struct rule *next;
+ char *name;
+ char *value;
+ char *dups; /* duplicates of 'value' with a partNN appended */
+ } *rule;
+};
+
+extern char rule_policy[], rule_part[];
+extern char rule_path[], rule_type[];
+extern char type_part[], type_disk[];
+
+extern void policyline(char *line, char *type);
+extern void policy_free(void);
+
+extern struct dev_policy *disk_policy(struct mdinfo *disk);
+extern void dev_policy_free(struct dev_policy *p);
+
+extern void pol_new(struct dev_policy **pol, char *name, char *val, char *metadata);
+extern struct dev_policy *pol_find(struct dev_policy *pol, char *name);
+
+enum policy_action {
+ act_default,
+ act_include,
+ act_re_add,
+ act_spare,
+ act_force_spare,
+ act_err
+};
+
+extern int policy_action_allows(struct dev_policy *plist, const char *metadata,
+ enum policy_action want);
+extern int disk_action_allows(struct mdinfo *disk, const char *metadata,
+ enum policy_action want);
+
+struct domainlist {
+ struct domainlist *next;
+ char *dom;
+};
+
+extern int domain_test(struct domainlist *dom, struct dev_policy *pol,
+ const char *metadata);
+extern struct domainlist *domain_from_array(struct mdinfo *mdi,
+ const char *metadata);
+extern void domain_free(struct domainlist *dl);
+extern void domain_merge(struct domainlist **domp, struct dev_policy *pol,
+ const char *metadata);
+
#if __GNUC__ < 3
struct stat64;
#endif
extern int Manage_ro(char *devname, int fd, int readonly);
extern int Manage_runstop(char *devname, int fd, int runstop, int quiet);
extern int Manage_resize(char *devname, int fd, long long size, int raid_disks);
-extern int Manage_reconfig(char *devname, int fd, int layout);
extern int Manage_subdevs(char *devname, int fd,
- mddev_dev_t devlist, int verbose);
+ mddev_dev_t devlist, int verbose, int test);
extern int autodetect(void);
extern int Grow_Add_device(char *devname, int fd, char *newdev);
extern int Grow_addbitmap(char *devname, int fd, char *file, int chunk, int delay, int write_behind, int force);
extern int Grow_reshape(char *devname, int fd, int quiet, char *backup_file,
long long size,
- int level, int layout, int chunksize, int raid_disks);
+ int level, char *layout_str, int chunksize, int raid_disks);
extern int Grow_restart(struct supertype *st, struct mdinfo *info,
- int *fdlist, int cnt, char *backup_file);
-
+ int *fdlist, int cnt, char *backup_file, int verbose);
+extern int Grow_continue(int mdfd, struct supertype *st,
+ struct mdinfo *info, char *backup_file);
extern int Assemble(struct supertype *st, char *mddev,
mddev_ident_t ident,
mddev_dev_t devlist, char *backup_file,
int readonly, int runstop,
- char *update, char *homehost,
+ char *update, char *homehost, int require_homehost,
int verbose, int force);
extern int Build(char *mddev, int chunk, int level, int layout,
int raiddisks, mddev_dev_t devlist, int assume_clean,
char *bitmap_file, int bitmap_chunk, int write_behind,
- int delay, int verbose, int autof);
+ int delay, int verbose, int autof, unsigned long long size);
extern int Create(struct supertype *st, char *mddev,
extern int Monitor(mddev_dev_t devlist,
char *mailaddr, char *alert_cmd,
int period, int daemonise, int scan, int oneshot,
- int dosyslog, int test, char *pidfile);
+ int dosyslog, int test, char *pidfile, int increments);
-extern int Kill(char *dev, int force, int quiet, int noexcl);
+extern int Kill(char *dev, struct supertype *st, int force, int quiet, int noexcl);
+extern int Kill_subarray(char *dev, char *subarray, int quiet);
+extern int Update_subarray(char *dev, char *subarray, char *update, mddev_ident_t ident, int quiet);
extern int Wait(char *dev);
-extern int WaitClean(char *dev, int verbose);
+extern int WaitClean(char *dev, int sock, int verbose);
extern int Incremental(char *devname, int verbose, int runstop,
- struct supertype *st, char *homehost, int autof);
+ struct supertype *st, char *homehost, int require_homehost,
+ int autof);
extern int Incremental_container(struct supertype *st, char *devname,
int verbose, int runstop, int autof,
int trustworthy);
extern void RebuildMap(void);
extern int IncrementalScan(int verbose);
-
+extern int IncrementalRemove(char *devname, int verbose);
extern int CreateBitmap(char *filename, int force, char uuid[16],
unsigned long chunksize, unsigned long daemon_sleep,
unsigned long write_behind,
extern int md_get_version(int fd);
extern int get_linux_version(void);
+extern long long parse_size(char *size);
extern int parse_uuid(char *str, int uuid[4]);
+extern int parse_layout_10(char *layout);
+extern int parse_layout_faulty(char *layout);
extern int check_ext2(int fd, char *name);
extern int check_reiser(int fd, char *name);
extern int check_raid(int fd, char *name);
+extern int check_partitions(int fd, char *dname, unsigned long long freesize);
extern int get_mdp_major(void);
extern int dev_open(char *dev, int flags);
extern mddev_ident_t conf_get_ident(char *dev);
extern mddev_dev_t conf_get_devs(void);
extern int conf_test_dev(char *devname);
+extern int conf_test_metadata(const char *version, int is_homehost);
extern struct createinfo *conf_get_create_info(void);
extern void set_conffile(char *file);
extern char *conf_get_mailaddr(void);
extern char *conf_get_mailfrom(void);
extern char *conf_get_program(void);
-extern char *conf_get_homehost(void);
+extern char *conf_get_homehost(int *require_homehostp);
extern char *conf_line(FILE *file);
extern char *conf_word(FILE *file, int allow_key);
+extern int conf_name_is_free(char *name);
+extern int devname_matches(char *name, char *match);
+extern struct mddev_ident_s *conf_match(struct mdinfo *info, struct supertype *st);
+
extern void free_line(char *line);
extern int match_oneof(char *devices, char *devname);
extern void uuid_from_super(int uuid[4], mdp_super_t *super);
extern const int uuid_match_any[4];
extern int same_uuid(int a[4], int b[4], int swapuuid);
extern void copy_uuid(void *a, int b[4], int swapuuid);
+extern char *__fname_from_uuid(int id[4], int swap, char *buf, char sep);
extern char *fname_from_uuid(struct supertype *st,
struct mdinfo *info, char *buf, char sep);
extern unsigned long calc_csum(void *super, int bytes);
extern int ask(char *mesg);
extern unsigned long long get_component_size(int fd);
extern void remove_partitions(int fd);
+extern int test_partition(int fd);
extern unsigned long long calc_array_size(int level, int raid_disks, int layout,
int chunksize, unsigned long long devsize);
extern int flush_metadata_updates(struct supertype *st);
extern int add_disk(int mdfd, struct supertype *st,
struct mdinfo *sra, struct mdinfo *info);
extern int set_array_info(int mdfd, struct supertype *st, struct mdinfo *info);
+unsigned long long min_recovery_start(struct mdinfo *array);
extern char *human_size(long long bytes);
extern char *human_size_brief(long long bytes);
char *chosen);
/* values for 'trustworthy' */
#define LOCAL 1
+#define LOCAL_ANY 10
#define FOREIGN 2
#define METADATA 3
extern int open_mddev(char *dev, int report_errors);
extern int open_container(int fd);
+extern int is_container_member(struct mdstat_ent *ent, char *devname);
+extern int is_subarray_active(char *subarray, char *devname);
+int is_container_active(char *devname);
+extern int open_subarray(char *dev, struct supertype *st, int quiet);
+extern struct superswitch *version_to_superswitch(char *vers);
extern int mdmon_running(int devnum);
-extern int signal_mdmon(int devnum);
+extern int mdmon_pid(int devnum);
extern int check_env(char *name);
+extern __u32 random32(void);
extern int start_mdmon(int devnum);
extern char *devnum2devname(int num);
#define ALGORITHM_PARITY_0_6 20
#define ALGORITHM_PARITY_N_6 ALGORITHM_PARITY_N
+/* Define PATH_MAX in case we don't use glibc or standard library does
+ * not have PATH_MAX defined. Assume max path length is 4K characters.
+ */
+#ifndef PATH_MAX
+#define PATH_MAX 4096
+#endif
+
projects / thirdparty / mdadm.git / blobdiff