/*
* mdadm - manage Linux "md" devices aka RAID arrays.
*
* Copyright (C) 2001-2009 Neil Brown <neilb@suse.de>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Author: Neil Brown
* Email: <neilb@suse.de>
*/
#define _GNU_SOURCE
#define _FILE_OFFSET_BITS 64
#include <unistd.h>
#ifdef __GLIBC__
extern __off64_t lseek64 __P ((int __fd, __off64_t __offset, int __whence));
#elif !defined(lseek64)
# if defined(__NO_STAT64) || __WORDSIZE != 32
# define lseek64 lseek
# endif
#endif
#include <sys/types.h>
#include <sys/stat.h>
#include <stdint.h>
#include <stdlib.h>
#include <time.h>
#include <sys/time.h>
#include <getopt.h>
#include <fcntl.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <syslog.h>
#ifdef __dietlibc__
#include <strings.h>
/* dietlibc has deprecated random and srandom!! */
#define random rand
#define srandom srand
#endif
#ifdef NO_COROSYNC
#define CS_OK 1
typedef uint64_t cmap_handle_t;
#else
#include <corosync/cmap.h>
#endif
#ifndef NO_DLM
#include <libdlm.h>
#include <errno.h>
#else
#define LKF_NOQUEUE 0x00000001
#define LKF_CONVERT 0x00000004
#define LKM_PWMODE 4
#define EUNLOCK 0x10002
typedef void *dlm_lshandle_t;
struct dlm_lksb {
int sb_status;
uint32_t sb_lkid;
char sb_flags;
char *sb_lvbptr;
};
#endif
#include <linux/kdev_t.h>
/*#include <linux/fs.h> */
#include <sys/mount.h>
#include <asm/types.h>
#include <sys/ioctl.h>
#define MD_MAJOR 9
#define MdpMinorShift 6
#ifndef BLKGETSIZE64
#define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 *arg) */
#endif
#define DEFAULT_CHUNK 512
#define DEFAULT_BITMAP_CHUNK 4096
#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.
* /run seems to have emerged as the best standard.
*/
#ifndef MAP_DIR
#define MAP_DIR "/run/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. Best is /var/run/mdadm as
* 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 "/run/mdadm"
#endif /* MDMON_DIR */
/* FAILED_SLOTS is where to save files storing recent removal of array
* member in order to allow future reuse of disk inserted in the same
* slot for array recovery
*/
#ifndef FAILED_SLOTS_DIR
#define FAILED_SLOTS_DIR "/run/mdadm/failed-slots"
#endif /* FAILED_SLOTS */
#include "md_u.h"
#include "md_p.h"
#include "bitmap.h"
#include "msg.h"
#include <endian.h>
/* Redhat don't like to #include <asm/byteorder.h>, and
* some time include <linux/byteorder/xxx_endian.h> isn't enough,
* and there is no standard conversion function so... */
/* And dietlibc doesn't think byteswap is ok, so.. */
/* #include <byteswap.h> */
#ifndef bswap_16
#define bswap_16(x) (((x) & 0x00ffU) << 8 | \
((x) & 0xff00U) >> 8)
#endif
#ifndef bswap_32
#define bswap_32(x) (((x) & 0x000000ffU) << 24 | \
((x) & 0xff000000U) >> 24 | \
((x) & 0x0000ff00U) << 8 | \
((x) & 0x00ff0000U) >> 8)
#endif
#ifndef bswap_64
#define bswap_64(x) (((x) & 0x00000000000000ffULL) << 56 | \
((x) & 0xff00000000000000ULL) >> 56 | \
((x) & 0x000000000000ff00ULL) << 40 | \
((x) & 0x00ff000000000000ULL) >> 40 | \
((x) & 0x0000000000ff0000ULL) << 24 | \
((x) & 0x0000ff0000000000ULL) >> 24 | \
((x) & 0x00000000ff000000ULL) << 8 | \
((x) & 0x000000ff00000000ULL) >> 8)
#endif
#if !defined(__KLIBC__)
#if BYTE_ORDER == LITTLE_ENDIAN
#define __cpu_to_le16(_x) (unsigned int)(_x)
#define __cpu_to_le32(_x) (unsigned int)(_x)
#define __cpu_to_le64(_x) (unsigned long long)(_x)
#define __le16_to_cpu(_x) (unsigned int)(_x)
#define __le32_to_cpu(_x) (unsigned int)(_x)
#define __le64_to_cpu(_x) (unsigned long long)(_x)
#define __cpu_to_be16(_x) bswap_16(_x)
#define __cpu_to_be32(_x) bswap_32(_x)
#define __cpu_to_be64(_x) bswap_64(_x)
#define __be16_to_cpu(_x) bswap_16(_x)
#define __be32_to_cpu(_x) bswap_32(_x)
#define __be64_to_cpu(_x) bswap_64(_x)
#elif BYTE_ORDER == BIG_ENDIAN
#define __cpu_to_le16(_x) bswap_16(_x)
#define __cpu_to_le32(_x) bswap_32(_x)
#define __cpu_to_le64(_x) bswap_64(_x)
#define __le16_to_cpu(_x) bswap_16(_x)
#define __le32_to_cpu(_x) bswap_32(_x)
#define __le64_to_cpu(_x) bswap_64(_x)
#define __cpu_to_be16(_x) (unsigned int)(_x)
#define __cpu_to_be32(_x) (unsigned int)(_x)
#define __cpu_to_be64(_x) (unsigned long long)(_x)
#define __be16_to_cpu(_x) (unsigned int)(_x)
#define __be32_to_cpu(_x) (unsigned int)(_x)
#define __be64_to_cpu(_x) (unsigned long long)(_x)
#else
# error "unknown endianness."
#endif
#endif /* __KLIBC__ */
/*
* Check at compile time that something is of a particular type.
* Always evaluates to 1 so you may use it easily in comparisons.
*/
#define typecheck(type,x) \
({ type __dummy; \
typeof(x) __dummy2; \
(void)(&__dummy == &__dummy2); \
1; \
})
/*
* These inlines deal with timer wrapping correctly.
*
* time_after(a,b) returns true if the time a is after time b.
*/
#define time_after(a,b) \
(typecheck(unsigned int, a) && \
typecheck(unsigned int, b) && \
((int)((b) - (a)) < 0))
#define time_before(a,b) time_after(b,a)
/*
* 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; })
#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
extern const char Name[];
/* general information that might be extracted from a superblock */
struct mdinfo {
mdu_array_info_t array;
mdu_disk_info_t disk;
__u64 events;
int uuid[4];
char name[33];
unsigned long long data_offset;
unsigned long long new_data_offset;
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)
*/
#define NO_RESHAPE 0
#define VOLUME_RESHAPE 1
#define CONTAINER_RESHAPE 2
#define RESHAPE_NO_BACKUP 16 /* Mask 'or'ed in */
int reshape_active;
unsigned long long reshape_progress;
int recovery_blocked; /* for external metadata it
* indicates that there is
* reshape in progress in
* container,
* for native metadata it is
* reshape_active field mirror
*/
int journal_device_required;
int journal_clean;
/* During reshape we can sometimes change the data_offset to avoid
* over-writing still-valid data. We need to know if there is space.
* So getinfo_super will fill in space_before and space_after in sectors.
* data_offset can be increased or decreased by this amount.
*/
unsigned long long space_before, space_after;
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 */
};
long bitmap_offset; /* 0 == none, 1 == a file */
unsigned long safe_mode_delay; /* ms delay to mark clean */
int new_level, delta_disks, new_layout, new_chunk;
int errors;
unsigned long cache_size; /* size of raid456 stripe cache*/
int mismatch_cnt;
char text_version[50];
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
#define DS_WRITE_MOSTLY 4
#define DS_SPARE 8
#define DS_BLOCKED 16
#define DS_REMOVE 1024
#define DS_UNBLOCK 2048
int prev_state, curr_state, next_state;
/* info read from sysfs */
char sysfs_array_state[20];
};
struct createinfo {
int uid;
int gid;
int autof;
int mode;
int symlinks;
int names;
int bblist;
struct supertype *supertype;
};
enum mode {
ASSEMBLE=1,
BUILD,
CREATE,
MANAGE,
MISC,
MONITOR,
GROW,
INCREMENTAL,
AUTODETECT,
mode_count
};
extern char short_options[];
extern char short_bitmap_options[];
extern char short_bitmap_auto_options[];
extern struct option long_options[];
extern char Version[], Usage[], Help[], OptionHelp[],
*mode_help[],
Help_create[], Help_build[], Help_assemble[], Help_grow[],
Help_incr[],
Help_manage[], Help_misc[], Help_monitor[], Help_config[];
/* for option that don't have short equivilents, we assign arbitrary
* numbers later than any 'short' character option.
*/
enum special_options {
AssumeClean = 300,
BitmapChunk,
WriteBehind,
ReAdd,
NoDegraded,
Sparc22,
BackupFile,
HomeHost,
AutoHomeHost,
Symlinks,
AutoDetect,
Waitclean,
DetailPlatform,
KillSubarray,
UpdateSubarray,
IncrementalPath,
NoSharing,
HelpOptions,
Brief,
ManageOpt,
Add,
AddSpare,
AddJournal,
Remove,
Fail,
Replace,
With,
MiscOpt,
WaitOpt,
ConfigFile,
ChunkSize,
WriteMostly,
Layout,
Auto,
Force,
SuperMinor,
EMail,
ProgramOpt,
Increment,
Fork,
Bitmap,
RebuildMapOpt,
InvalidBackup,
UdevRules,
FreezeReshape,
Continue,
OffRootOpt,
Prefer,
KillOpt,
DataOffset,
ExamineBB,
Dump,
Restore,
Action,
Nodes,
ClusterName,
ClusterConfirm,
WriteJournal,
};
enum prefix_standard {
JEDEC,
IEC
};
enum bitmap_update {
NoUpdate,
NameUpdate,
NodeNumUpdate,
};
/* structures read from config file */
/* List of mddevice names and identifiers
* Identifiers can be:
* uuid=128-hex-uuid
* super-minor=decimal-minor-number-from-superblock
* devices=comma,separated,list,of,device,names,with,wildcards
*
* If multiple fields are present, the intersection of all matching
* devices is considered
*/
#define UnSet (0xfffe)
struct mddev_ident {
char *devname;
int uuid_set;
int uuid[4];
char name[33];
int super_minor;
char *devices; /* comma separated list of device
* names with wild cards
*/
int level;
int raid_disks;
int spare_disks;
struct supertype *st;
int autof; /* 1 for normal, 2 for partitioned */
char *spare_group;
char *bitmap_file;
int bitmap_fd;
char *container; /* /dev/whatever name of container, or
* uuid of container. You would expect
* this to be the 'devname' or UUID
* of some other entry.
*/
char *member; /* subarray within a container */
struct mddev_ident *next;
union {
/* fields needed by different users of this structure */
int assembled; /* set when assembly succeeds */
};
};
struct context {
int readonly;
int runstop;
int verbose;
int brief;
int force;
char *homehost;
int require_homehost;
char *prefer;
int export;
int test;
char *subarray;
char *update;
int scan;
int SparcAdjust;
int autof;
int delay;
int freeze_reshape;
char *backup_file;
int invalid_backup;
char *action;
int nodes;
char *homecluster;
};
struct shape {
int raiddisks;
int sparedisks;
int journaldisks;
int level;
int layout;
char *layout_str;
int chunk;
int bitmap_chunk;
char *bitmap_file;
int assume_clean;
int write_behind;
unsigned long long size;
};
/* List of device names - wildcards expanded */
struct mddev_dev {
char *devname;
int disposition; /* 'a' for add, 'r' for remove, 'f' for fail,
* 'A' for re_add.
* Not set for names read from .config
*/
char writemostly; /* 1 for 'set writemostly', 2 for 'clear writemostly' */
int used; /* set when used */
long long data_offset;
struct mddev_dev *next;
};
typedef struct mapping {
char *name;
int num;
} mapping_t;
struct mdstat_ent {
char devnm[32];
int active;
char *level;
char *pattern; /* U or up, _ for down */
int percent; /* -1 if no resync */
int resync; /* 3 if check, 2 if reshape, 1 if resync, 0 if recovery */
int devcnt;
int raid_disks;
char * metadata_version;
struct dev_member {
char *name;
struct dev_member *next;
} *members;
struct mdstat_ent *next;
};
extern struct mdstat_ent *mdstat_read(int hold, int start);
extern void mdstat_close(void);
extern void free_mdstat(struct mdstat_ent *ms);
extern void mdstat_wait(int seconds);
extern void mdstat_wait_fd(int fd, const sigset_t *sigmask);
extern int mddev_busy(char *devnm);
extern struct mdstat_ent *mdstat_by_component(char *name);
extern struct mdstat_ent *mdstat_by_subdev(char *subdev, char *container);
struct map_ent {
struct map_ent *next;
char devnm[32];
char metadata[20];
int uuid[4];
int bad;
char *path;
};
extern int map_update(struct map_ent **mpp, char *devnm, char *metadata,
int uuid[4], char *path);
extern void map_remove(struct map_ent **map, char *devnm);
extern struct map_ent *map_by_uuid(struct map_ent **map, int uuid[4]);
extern struct map_ent *map_by_devnm(struct map_ent **map, char *devnm);
extern void map_free(struct map_ent *map);
extern struct map_ent *map_by_name(struct map_ent **map, char *name);
extern void map_read(struct map_ent **melp);
extern int map_write(struct map_ent *mel);
extern void map_delete(struct map_ent **mapp, char *devnm);
extern void map_add(struct map_ent **melp,
char *devnm, char *metadata, int uuid[4], char *path);
extern int map_lock(struct map_ent **melp);
extern void map_unlock(struct map_ent **melp);
extern void map_fork(void);
/* various details can be requested */
enum sysfs_read_flags {
GET_LEVEL = (1 << 0),
GET_LAYOUT = (1 << 1),
GET_COMPONENT = (1 << 2),
GET_CHUNK = (1 << 3),
GET_CACHE = (1 << 4),
GET_MISMATCH = (1 << 5),
GET_VERSION = (1 << 6),
GET_DISKS = (1 << 7),
GET_DEGRADED = (1 << 8),
GET_SAFEMODE = (1 << 9),
GET_BITMAP_LOCATION = (1 << 10),
GET_DEVS = (1 << 20), /* gets role, major, minor */
GET_OFFSET = (1 << 21),
GET_SIZE = (1 << 22),
GET_STATE = (1 << 23),
GET_ERROR = (1 << 24),
GET_ARRAY_STATE = (1 << 25),
};
/* If fd >= 0, get the array it is open on,
* else use devnm.
*/
extern int sysfs_open(char *devnm, char *devname, char *attr);
extern void sysfs_init(struct mdinfo *mdi, int fd, char *devnm);
extern void sysfs_init_dev(struct mdinfo *mdi, unsigned long devid);
extern void sysfs_free(struct mdinfo *sra);
extern struct mdinfo *sysfs_read(int fd, char *devnm, unsigned long options);
extern int sysfs_attr_match(const char *attr, const char *str);
extern int sysfs_match_word(const char *word, char **list);
extern int sysfs_set_str(struct mdinfo *sra, struct mdinfo *dev,
char *name, char *val);
extern int sysfs_set_num(struct mdinfo *sra, struct mdinfo *dev,
char *name, unsigned long long val);
extern int sysfs_set_num_signed(struct mdinfo *sra, struct mdinfo *dev,
char *name, 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_two(int fd, unsigned long long *v1, unsigned long long *v2);
extern int sysfs_get_two(struct mdinfo *sra, struct mdinfo *dev,
char *name, unsigned long long *v1, unsigned long long *v2);
extern int sysfs_fd_get_str(int fd, char *val, int size);
extern int sysfs_attribute_available(struct mdinfo *sra, struct mdinfo *dev,
char *name);
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 resume);
extern int sysfs_disk_to_scsi_id(int fd, __u32 *id);
extern int sysfs_unique_holder(char *devnm, long rdev);
extern int sysfs_freeze_array(struct mdinfo *sra);
extern int sysfs_wait(int fd, int *msec);
extern int load_sys(char *path, char *buf);
extern int reshape_prepare_fdlist(char *devname,
struct mdinfo *sra,
int raid_disks,
int nrdisks,
unsigned long blocks,
char *backup_file,
int *fdlist,
unsigned long long *offsets);
extern void reshape_free_fdlist(int *fdlist,
unsigned long long *offsets,
int size);
extern int reshape_open_backup_file(char *backup,
int fd,
char *devname,
long blocks,
int *fdlist,
unsigned long long *offsets,
char *sysfs_name,
int restart);
extern unsigned long compute_backup_blocks(int nchunk, int ochunk,
unsigned int ndata, unsigned int odata);
extern char *locate_backup(char *name);
extern char *make_backup(char *name);
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,
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,
unsigned long long start, unsigned long long length,
char *src_buf);
#ifndef Sendmail
#define Sendmail "/usr/lib/sendmail -t"
#endif
#define SYSLOG_FACILITY LOG_DAEMON
extern char *map_num(mapping_t *map, int num);
extern int map_name(mapping_t *map, char *name);
extern mapping_t r5layout[], r6layout[], pers[], modes[], faultylayout[];
extern char *map_dev_preferred(int major, int minor, int create,
char *prefer);
static inline char *map_dev(int major, int minor, int create)
{
return map_dev_preferred(major, minor, create, NULL);
}
struct active_array;
struct metadata_update;
/* 'struct reshape' records the intermediate states of
* a general reshape.
* The starting geometry is converted to the 'before' geometry
* by at most an atomic level change. They could be the same.
* Similarly the 'after' geometry is converted to the final
* geometry by at most a level change.
* Note that 'before' and 'after' must have the same level.
* 'blocks' is the minimum number of sectors for a reshape unit.
* This will be a multiple of the stripe size in each of the
* 'before' and 'after' geometries.
* If 'blocks' is 0, no restriping is necessary.
* 'min_offset_change' is the minimum change to data_offset to
* allow the reshape to happen. It is at least the larger of
* the old and new chunk sizes, and typically the same as 'blocks'
* divided by number of data disks.
*/
struct reshape {
int level;
int parity; /* number of parity blocks/devices */
struct {
int layout;
int data_disks;
} before, after;
unsigned long long backup_blocks;
unsigned long long min_offset_change;
unsigned long long stripes; /* number of old stripes that comprise 'blocks'*/
unsigned long long new_size; /* New size of array in sectors */
};
/* A superswitch provides entry point the a metadata handler.
*
* The superswitch primarily operates on some "metadata" that
* is accessed via the 'supertype'.
* This metadata has one of three possible sources.
* 1/ It is read from a single device. In this case it may not completely
* describe the array or arrays as some information might be on other
* devices.
* 2/ It is read from all devices in a container. In this case all
* information is present.
* 3/ It is created by ->init_super / ->add_to_super. In this case it will
* be complete once enough ->add_to_super calls have completed.
*
* When creating an array inside a container, the metadata will be
* formed by a combination of 2 and 3. The metadata or the array is read,
* then new information is added.
*
* The metadata must sometimes have a concept of a 'current' array
* and a 'current' device.
* The 'current' array is set by init_super to be the newly created array,
* or is set by super_by_fd when it finds it is looking at an array inside
* a container.
*
* The 'current' device is either the device that the metadata was read from
* in case 1, or the last device added by add_to_super in case 3.
* Case 2 does not identify a 'current' device.
*/
extern struct superswitch {
/* Used to report details of metadata read from a component
* device. ->load_super has been called.
*/
void (*examine_super)(struct supertype *st, char *homehost);
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);
int (*examine_badblocks)(struct supertype *st, int fd, char *devname);
int (*copy_metadata)(struct supertype *st, int from, int to);
/* Used to report details of an active array.
* ->load_super was possibly given a 'component' string.
*/
void (*detail_super)(struct supertype *st, char *homehost);
void (*brief_detail_super)(struct supertype *st);
void (*export_detail_super)(struct supertype *st);
/* Optional: platform hardware / firmware details */
int (*detail_platform)(int verbose, int enumerate_only, char *controller_path);
int (*export_detail_platform)(int verbose, char *controller_path);
/* Used:
* to get uuid to storing in bitmap metadata
* and 'reshape' backup-data metadata
* To see if a device is being re-added to an array it was part of.
*/
void (*uuid_from_super)(struct supertype *st, int uuid[4]);
/* Extract generic details from metadata. This could be details about
* the container, or about an individual array within the container.
* The determination is made either by:
* load_super being given a 'component' string.
* validate_geometry determining what to create.
* The info includes both array information and device information.
* The particular device should be:
* The last device added by add_to_super
* The device the metadata was loaded from by load_super
* If 'map' is present, then it is an array raid_disks long
* (raid_disk must already be set and correct) and it is filled
* with 1 for slots that are thought to be active and 0 for slots which
* appear to be failed/missing.
* *info is zeroed out before data is added.
*/
void (*getinfo_super)(struct supertype *st, struct mdinfo *info, char *map);
struct mdinfo *(*getinfo_super_disks)(struct supertype *st);
/* Check if the given metadata is flagged as belonging to "this"
* host. 0 for 'no', 1 for 'yes', -1 for "Don't record homehost"
*/
int (*match_home)(struct supertype *st, char *homehost);
/* Make one of several generic modifications to metadata
* prior to assembly (or other times).
* sparc2.2 - first bug in early 0.90 metadata
* super-minor - change name of 0.90 metadata
* summaries - 'correct' any redundant data
* resync - mark array as dirty to trigger a resync.
* uuid - set new uuid - only 0.90 or 1.x
* name - change the name of the array (where supported)
* homehost - change which host this array is tied to.
* devicesize - If metadata is at start of device, change recorded
* device size to match actual device size
* byteorder - swap bytes for 0.90 metadata
*
* force-one - mark that device as uptodate, not old or failed.
* force-array - mark array as clean if it would not otherwise
* assemble
* assemble - not sure how this is different from force-one...
* linear-grow-new - add a new device to a linear array, but don't
* change the size: so superblock still matches
* linear-grow-update - now change the size of the array.
* writemostly - set the WriteMostly1 bit in the superblock devflags
* readwrite - clear the WriteMostly1 bit in the superblock devflags
* no-bitmap - clear any record that a bitmap is present.
* bbl - add a bad-block-log if possible
* no-bbl - remove any bad-block-log is it is empty.
* force-no-bbl - remove any bad-block-log even if empty.
* revert-reshape - If a reshape is in progress, modify metadata so
* it will resume going in the opposite direction.
*/
int (*update_super)(struct supertype *st, struct mdinfo *info,
char *update,
char *devname, int verbose,
int uuid_set, char *homehost);
/* Create new metadata for new array as described. This could
* be a new container, or an array in a pre-existing container.
* Also used to zero metadata prior to writing it to invalidate old
* metadata.
*/
int (*init_super)(struct supertype *st, mdu_array_info_t *info,
unsigned long long size, char *name,
char *homehost, int *uuid,
unsigned long long data_offset);
/* update the metadata to include new device, either at create or
* when hot-adding a spare.
*/
int (*add_to_super)(struct supertype *st, mdu_disk_info_t *dinfo,
int fd, char *devname,
unsigned long long data_offset);
/* update the metadata to delete a device,
* when hot-removing.
*/
int (*remove_from_super)(struct supertype *st, mdu_disk_info_t *dinfo);
/* Write metadata to one device when fixing problems or adding
* a new device.
*/
int (*store_super)(struct supertype *st, int fd);
/* Write all metadata for this array.
*/
int (*write_init_super)(struct supertype *st);
/* Check if metadata read from one device is compatible with an array,
* used when assembling an array, or pseudo-assembling was with
* "--examine --brief"
* If "st" has not yet been loaded the superblock from, "tst" is
* moved in, otherwise the superblock in 'st' is compared with
* 'tst'.
*/
int (*compare_super)(struct supertype *st, struct supertype *tst);
/* Load metadata from a single device. If 'devname' is not NULL
* print error messages as appropriate */
int (*load_super)(struct supertype *st, int fd, char *devname);
/* 'fd' is a 'container' md array - load array metadata from the
* whole container.
*/
int (*load_container)(struct supertype *st, int fd, char *devname);
/* If 'arg' is a valid name of this metadata type, allocate and
* return a 'supertype' for the particular minor version */
struct supertype * (*match_metadata_desc)(char *arg);
/* If a device has the given size, and the data_offset has been
* requested - work out how much space is available for data.
* This involves adjusting for reserved space (e.g. bitmaps)
* and for any rounding.
* 'mdadm' only calls this for existing arrays where a possible
* spare is being added. However some super-handlers call it
* internally from validate_geometry when creating an array.
*/
__u64 (*avail_size)(struct supertype *st, __u64 size,
unsigned long long data_offset);
/* This is similar to 'avail_size' in purpose, but is used for
* containers for which there is no 'component size' to compare.
* This reports that whole-device size which is a minimum
*/
unsigned long long (*min_acceptable_spare_size)(struct supertype *st);
/* Find somewhere to put a bitmap - possibly auto-size it - and
* update the metadata to record this. The array may be newly
* created, in which case data_size may be updated, or it might
* already exist. Metadata handler can know if init_super
* has been called, but not write_init_super.
*/
int (*add_internal_bitmap)(struct supertype *st, int *chunkp,
int delay, int write_behind,
unsigned long long size, int may_change, int major);
/* Seek 'fd' to start of write-intent-bitmap. Must be an
* md-native format bitmap
*/
int (*locate_bitmap)(struct supertype *st, int fd);
/* if add_internal_bitmap succeeded for existing array, this
* writes it out.
*/
int (*write_bitmap)(struct supertype *st, int fd, enum bitmap_update update);
/* Free the superblock and any other allocated data */
void (*free_super)(struct supertype *st);
/* validate_geometry is called with an st returned by
* match_metadata_desc.
* It should check that the geometry described is compatible with
* the metadata type. It will be called repeatedly as devices
* added to validate changing size and new devices. If there are
* inter-device dependencies, it should record sufficient details
* so these can be validated.
* Both 'size' and '*freesize' are in sectors. chunk is KiB.
* Return value is:
* 1: everything is OK
* 0: not OK for some reason - if 'verbose', then error was reported.
* -1: st->sb was NULL, 'subdev' is a member of a container of this
* type, but array is not acceptable for some reason
* message was reported even if verbose is 0.
*/
int (*validate_geometry)(struct supertype *st, int level, int layout,
int raiddisks,
int *chunk, unsigned long long size,
unsigned long long data_offset,
char *subdev, unsigned long long *freesize,
int verbose);
/* Return a linked list of 'mdinfo' structures for all arrays
* in the container. For non-containers, it is like
* getinfo_super with an allocated mdinfo.*/
struct mdinfo *(*container_content)(struct supertype *st, char *subarray);
/* query the supertype for default geometry */
void (*default_geometry)(struct supertype *st, int *level, int *layout, int *chunk); /* 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 *subarray,
char *update, struct mddev_ident *ident); /* optional */
/* Check if reshape is supported for this external format.
* st is obtained from super_by_fd() where st->subarray[0] is
* initialized to indicate if reshape is being performed at the
* container or subarray level
*/
#define APPLY_METADATA_CHANGES 1
#define ROLLBACK_METADATA_CHANGES 0
int (*reshape_super)(struct supertype *st,
unsigned long long size, int level,
int layout, int chunksize, int raid_disks,
int delta_disks, char *backup, char *dev,
int direction,
int verbose); /* optional */
int (*manage_reshape)( /* optional */
int afd, struct mdinfo *sra, struct reshape *reshape,
struct supertype *st, unsigned long blocks,
int *fds, unsigned long long *offsets,
int dests, int *destfd, unsigned long long *destoffsets);
/* for mdmon */
int (*open_new)(struct supertype *c, struct active_array *a,
char *inst);
/* Tell the metadata handler the current state of the array.
* This covers whether it is known to be consistent (no pending writes)
* and how far along a resync is known to have progressed
* (in a->resync_start).
* resync status is really irrelevant if the array is not consistent,
* but some metadata (DDF!) have a place to record the distinction.
* If 'consistent' is '2', then the array can mark it dirty if a
* resync/recovery/whatever is required, or leave it clean if not.
* Return value is 0 dirty (not consistent) and 1 if clean.
* it is only really important if consistent is passed in as '2'.
*/
int (*set_array_state)(struct active_array *a, int consistent);
/* When the state of a device might have changed, we call set_disk to
* tell the metadata what the current state is.
* Typically this happens on spare->in_sync and (spare|in_sync)->faulty
* transitions.
* set_disk might be called when the state of the particular disk has
* not in fact changed.
*/
void (*set_disk)(struct active_array *a, int n, int state);
void (*sync_metadata)(struct supertype *st);
void (*process_update)(struct supertype *st,
struct metadata_update *update);
/* Prepare updates allocates extra memory that might be
* needed. If the update cannot be understood, return 0.
*/
int (*prepare_update)(struct supertype *st,
struct metadata_update *update);
/* activate_spare will check if the array is degraded and, if it
* is, try to find some spare space in the container.
* On success, it add appropriate updates (For process_update) to
* to the 'updates' list and returns a list of 'mdinfo' identifying
* the device, or devices as there might be multiple missing
* devices and multiple spares available.
*/
struct mdinfo *(*activate_spare)(struct active_array *a,
struct metadata_update **updates);
/*
* Return statically allocated string that represents metadata specific
* controller domain of the disk. The domain is used in disk domain
* matching functions. Disks belong to the same domain if the they have
* the same domain from mdadm.conf and belong the same metadata domain.
* Returning NULL or not providing this handler means that metadata
* does not distinguish the differences between disks that belong to
* different controllers. They are in the domain specified by
* configuration file (mdadm.conf).
* In case when the metadata has the notion of domains based on disk
* it shall return NULL for disks that do not belong to the controller
* the supported domains. Such disks will form another domain and won't
* be mixed with supported ones.
*/
const char *(*get_disk_controller_domain)(const char *path);
/* for external backup area */
int (*recover_backup)(struct supertype *st, struct mdinfo *info);
/* validate container after assemble */
int (*validate_container)(struct mdinfo *info);
int swapuuid; /* true if uuid is bigending rather than hostendian */
int external;
const char *name; /* canonical metadata name */
} *superlist[];
extern struct superswitch super0, super1;
extern struct superswitch super_imsm, super_ddf;
extern struct superswitch mbr, gpt;
struct metadata_update {
int len;
char *buf;
void *space; /* allocated space that monitor will use */
void **space_list; /* list of allocated spaces that monitor can
* use or that it returned.
*/
struct metadata_update *next;
};
/* A supertype holds a particular collection of metadata.
* It identifies the metadata type by the superswitch, and the particular
* sub-version of that metadata type.
* metadata read in or created is stored in 'sb' and 'info'.
* There are also fields used by mdmon to track containers.
*
* A supertype may refer to:
* Just an array, possibly in a container
* A container, not identifying any particular array
* Info read from just one device, not yet fully describing the array/container.
*
*
* A supertype is created by:
* super_by_fd
* guess_super
* dup_super
*/
struct supertype {
struct superswitch *ss;
int minor_version;
int max_devs;
char container_devnm[32]; /* devnm of container */
void *sb;
void *info;
void *other; /* Hack used to convert v0.90 to v1.0 */
unsigned long long devsize;
unsigned long long data_offset; /* used by v1.x only */
int ignore_hw_compat; /* used to inform metadata handlers that it should ignore
HW/firmware related incompatability to load metadata.
Used when examining metadata to display content of disk
when user has no hw/firmare compatible system.
*/
struct metadata_update *updates;
struct metadata_update **update_tail;
/* extra stuff used by mdmon */
struct active_array *arrays;
int sock; /* listen to external programs */
char devnm[32]; /* e.g. md0. This appears in metadata_version:
* external:/md0/12
*/
int devcnt;
int retry_soon;
int nodes;
char *cluster_name;
struct mdinfo *devs;
};
extern struct supertype *super_by_fd(int fd, char **subarray);
enum guess_types { guess_any, guess_array, guess_partitions };
extern struct supertype *guess_super_type(int fd, enum guess_types guess_type);
static inline struct supertype *guess_super(int fd) {
return guess_super_type(fd, guess_any);
}
extern struct supertype *dup_super(struct supertype *st);
extern int get_dev_size(int fd, char *dname, unsigned long long *sizep);
extern int must_be_container(int fd);
extern int dev_size_from_id(dev_t id, unsigned long long *size);
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;
const char *value;
};
extern char pol_act[], pol_domain[], pol_metadata[], pol_auto[];
/* 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_add(char *type, ...);
extern void policy_free(void);
extern struct dev_policy *path_policy(char *path, char *type);
extern struct dev_policy *disk_policy(struct mdinfo *disk);
extern struct dev_policy *devid_policy(int devid);
extern void dev_policy_free(struct dev_policy *p);
//extern void pol_new(struct dev_policy **pol, char *name, char *val, char *metadata);
extern void pol_add(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, /* This only applies to bare devices */
act_spare_same_slot, /* this allows non-bare devices,
* but only if recent removal */
act_force_spare, /* this allow non-bare devices in any case */
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;
const 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 domainlist_add_dev(struct domainlist **dom, int devid,
const char *metadata);
extern void domain_free(struct domainlist *dl);
extern void domain_merge(struct domainlist **domp, struct dev_policy *pol,
const char *metadata);
void domain_add(struct domainlist **domp, char *domain);
extern void policy_save_path(char *id_path, struct map_ent *array);
extern int policy_check_path(struct mdinfo *disk, struct map_ent *array);
#if __GNUC__ < 3
struct stat64;
#endif
#define HAVE_NFTW we assume
#define HAVE_FTW
#ifdef __UCLIBC__
# include <features.h>
# ifndef __UCLIBC_HAS_LFS__
# define lseek64 lseek
# endif
# ifndef __UCLIBC_HAS_FTW__
# undef HAVE_FTW
# undef HAVE_NFTW
# endif
#endif
#ifdef __dietlibc__
# undef HAVE_NFTW
#endif
#if defined(__KLIBC__)
# undef HAVE_NFTW
# undef HAVE_FTW
#endif
#ifndef HAVE_NFTW
# define FTW_PHYS 1
# ifndef HAVE_FTW
struct FTW {};
# endif
#endif
#ifdef HAVE_FTW
# include <ftw.h>
#endif
extern int add_dev(const char *name, const struct stat *stb, int flag, struct FTW *s);
extern int Manage_ro(char *devname, int fd, int readonly);
extern int Manage_run(char *devname, int fd, struct context *c);
extern int Manage_stop(char *devname, int fd, int quiet,
int will_retry);
extern int Manage_subdevs(char *devname, int fd,
struct mddev_dev *devlist, int verbose, int test,
char *update, int force);
extern int autodetect(void);
extern int Grow_Add_device(char *devname, int fd, char *newdev);
extern int Grow_addbitmap(char *devname, int fd,
struct context *c, struct shape *s);
extern int Grow_reshape(char *devname, int fd,
struct mddev_dev *devlist,
unsigned long long data_offset,
struct context *c, struct shape *s);
extern int Grow_restart(struct supertype *st, struct mdinfo *info,
int *fdlist, int cnt, char *backup_file, int verbose);
extern int Grow_continue(int mdfd, struct supertype *st,
struct mdinfo *info, char *backup_file,
int forked, int freeze_reshape);
extern int restore_backup(struct supertype *st,
struct mdinfo *content,
int working_disks,
int spares,
char **backup_filep,
int verbose);
extern int Grow_continue_command(char *devname, int fd,
char *backup_file, int verbose);
extern int Assemble(struct supertype *st, char *mddev,
struct mddev_ident *ident,
struct mddev_dev *devlist,
struct context *c);
extern int Build(char *mddev, struct mddev_dev *devlist,
struct shape *s, struct context *c);
extern int Create(struct supertype *st, char *mddev,
char *name, int *uuid,
int subdevs, struct mddev_dev *devlist,
struct shape *s,
struct context *c,
unsigned long long data_offset);
extern int Detail(char *dev, struct context *c);
extern int Detail_Platform(struct superswitch *ss, int scan, int verbose, int export, char *controller_path);
extern int Query(char *dev);
extern int ExamineBadblocks(char *devname, int brief, struct supertype *forcest);
extern int Examine(struct mddev_dev *devlist, struct context *c,
struct supertype *forcest);
extern int Monitor(struct mddev_dev *devlist,
char *mailaddr, char *alert_cmd,
struct context *c,
int daemonise, int oneshot,
int dosyslog, char *pidfile, int increments,
int share);
extern int Kill(char *dev, struct supertype *st, int force, int verbose, int noexcl);
extern int Kill_subarray(char *dev, char *subarray, int verbose);
extern int Update_subarray(char *dev, char *subarray, char *update, struct mddev_ident *ident, int quiet);
extern int Wait(char *dev);
extern int WaitClean(char *dev, int sock, int verbose);
extern int SetAction(char *dev, char *action);
extern int Incremental(struct mddev_dev *devlist, struct context *c,
struct supertype *st);
extern void RebuildMap(void);
extern int IncrementalScan(struct context *c, char *devnm);
extern int IncrementalRemove(char *devname, char *path, int verbose);
extern int CreateBitmap(char *filename, int force, char uuid[16],
unsigned long chunksize, unsigned long daemon_sleep,
unsigned long write_behind,
unsigned long long array_size,
int major);
extern int ExamineBitmap(char *filename, int brief, struct supertype *st);
extern int Write_rules(char *rule_name);
extern int bitmap_update_uuid(int fd, int *uuid, int swap);
extern unsigned long bitmap_sectors(struct bitmap_super_s *bsb);
extern int Dump_metadata(char *dev, char *dir, struct context *c,
struct supertype *st);
extern int Restore_metadata(char *dev, char *dir, struct context *c,
struct supertype *st, int only);
extern int md_get_version(int fd);
extern int get_linux_version(void);
extern int mdadm_version(char *version);
extern unsigned 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 long parse_num(char *num);
extern int parse_cluster_confirm_arg(char *inp, char **devname, int *slot);
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,
unsigned long long size);
extern int get_mdp_major(void);
extern int get_maj_min(char *dev, int *major, int *minor);
extern int dev_open(char *dev, int flags);
extern int open_dev(char *devnm);
extern void reopen_mddev(int mdfd);
extern int open_dev_flags(char *devnm, int flags);
extern int open_dev_excl(char *devnm);
extern int is_standard(char *dev, int *nump);
extern int same_dev(char *one, char *two);
extern int compare_paths (char* path1,char* path2);
extern void enable_fds(int devices);
extern int parse_auto(char *str, char *msg, int config);
extern struct mddev_ident *conf_get_ident(char *dev);
extern struct mddev_dev *conf_get_devs(void);
extern int conf_test_dev(char *devname);
extern int conf_test_metadata(const char *version, struct dev_policy *pol, 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(int *require_homehostp);
extern char *conf_get_homecluster(void);
extern char *conf_line(FILE *file);
extern char *conf_word(FILE *file, int allow_key);
extern void print_quoted(char *str);
extern void print_escape(char *str);
extern int use_udev(void);
extern unsigned long GCD(unsigned long a, unsigned long b);
extern int conf_name_is_free(char *name);
extern int conf_verify_devnames(struct mddev_ident *array_list);
extern int devname_matches(char *name, char *match);
extern struct mddev_ident *conf_match(struct supertype *st,
struct mdinfo *info,
char *devname,
int verbose, int *rvp);
extern int experimental(void);
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_zero[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 enough(int level, int raid_disks, int layout, int clean,
char *avail);
extern int enough_fd(int fd);
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 int test_partition_from_id(dev_t id);
extern int get_data_disks(int level, int layout, int raid_disks);
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 void append_metadata_update(struct supertype *st, void *buf, int len);
extern int assemble_container_content(struct supertype *st, int mdfd,
struct mdinfo *content,
struct context *c,
char *chosen_name, int *result);
#define INCR_NO 1
#define INCR_UNSAFE 2
#define INCR_ALREADY 4
#define INCR_YES 8
extern struct mdinfo *container_choose_spares(struct supertype *st,
unsigned long long min_size,
struct domainlist *domlist,
char *spare_group,
const char *metadata, int get_one);
extern int move_spare(char *from_devname, char *to_devname, dev_t devid);
extern int add_disk(int mdfd, struct supertype *st,
struct mdinfo *sra, struct mdinfo *info);
extern int remove_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, int prefix);
extern void print_r10_layout(int layout);
extern char *find_free_devnm(int use_partitions);
extern void put_md_name(char *name);
extern char *devid2kname(int devid);
extern char *devid2devnm(int devid);
extern int devnm2devid(char *devnm);
extern char *get_md_name(char *devnm);
extern char DefaultConfFile[];
extern int create_mddev(char *dev, char *name, int autof, int trustworthy,
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 metadata_container_matches(char *metadata, char *devnm);
extern int metadata_subdev_matches(char *metadata, char *devnm);
extern int is_container_member(struct mdstat_ent *ent, char *devname);
extern int is_subarray_active(char *subarray, char *devname);
extern int open_subarray(char *dev, char *subarray, struct supertype *st, int quiet);
extern struct superswitch *version_to_superswitch(char *vers);
extern int mdmon_running(char *devnm);
extern int mdmon_pid(char *devnm);
extern int check_env(char *name);
extern __u32 random32(void);
extern int start_mdmon(char *devnm);
extern int child_monitor(int afd, struct mdinfo *sra, struct reshape *reshape,
struct supertype *st, unsigned long stripes,
int *fds, unsigned long long *offsets,
int dests, int *destfd, unsigned long long *destoffsets);
void abort_reshape(struct mdinfo *sra);
void *super1_make_v0(struct supertype *st, struct mdinfo *info, mdp_super_t *sb0);
extern void fmt_devname(char *name, int num);
extern char *stat2devnm(struct stat *st);
extern char *fd2devnm(int fd);
extern int in_initrd(void);
struct cmap_hooks {
void *cmap_handle; /* corosync lib related */
int (*initialize)(cmap_handle_t *handle);
int (*get_string)(cmap_handle_t handle,
const char *string,
char **name);
int (*finalize)(cmap_handle_t handle);
};
extern void set_cmap_hooks(void);
extern void set_hooks(void);
struct dlm_hooks {
void *dlm_handle; /* dlm lib related */
dlm_lshandle_t (*create_lockspace)(const char *name,
unsigned int mode);
int (*release_lockspace)(const char *name, dlm_lshandle_t ls,
int force);
int (*ls_lock)(dlm_lshandle_t lockspace, uint32_t mode,
struct dlm_lksb *lksb, uint32_t flags,
const void *name, unsigned int namelen,
uint32_t parent, void (*astaddr) (void *astarg),
void *astarg, void (*bastaddr) (void *astarg),
void *range);
int (*ls_unlock)(dlm_lshandle_t lockspace, uint32_t lkid,
uint32_t flags, struct dlm_lksb *lksb,
void *astarg);
int (*ls_get_fd)(dlm_lshandle_t ls);
int (*dispatch)(int fd);
};
extern int get_cluster_name(char **name);
extern int dlm_funs_ready(void);
extern int cluster_get_dlmlock(int *lockid);
extern int cluster_release_dlmlock(int lockid);
extern void set_dlm_hooks(void);
#define _ROUND_UP(val, base) (((val) + (base) - 1) & ~(base - 1))
#define ROUND_UP(val, base) _ROUND_UP(val, (typeof(val))(base))
#define ROUND_UP_PTR(ptr, base) ((typeof(ptr)) \
(ROUND_UP((unsigned long)(ptr), base)))
static inline int is_subarray(char *vers)
{
/* The version string for a 'subarray' (an array in a container)
* is
* /containername/componentname for normal read-write arrays
* -containername/componentname for arrays which mdmon must not
* reconfigure. They might be read-only
* or might be undergoing reshape etc.
* containername is e.g. md0, md_d1
* componentname is dependant on the metadata. e.g. '1' 'S1' ...
*/
return (*vers == '/' || *vers == '-');
}
static inline char *to_subarray(struct mdstat_ent *ent, char *container)
{
return &ent->metadata_version[10+strlen(container)+1];
}
#ifdef DEBUG
#define dprintf(fmt, arg...) \
fprintf(stderr, "%s: %s: "fmt, Name, __func__, ##arg)
#define dprintf_cont(fmt, arg...) \
fprintf(stderr, fmt, ##arg)
#else
#define dprintf(fmt, arg...) \
({ if (0) fprintf(stderr, "%s: %s: " fmt, Name, __func__, ##arg); 0; })
#define dprintf_cont(fmt, arg...) \
({ if (0) fprintf(stderr, fmt, ##arg); 0; })
#endif
#include <assert.h>
#include <stdarg.h>
static inline int xasprintf(char **strp, const char *fmt, ...) {
va_list ap;
int ret;
va_start(ap, fmt);
ret = vasprintf(strp, fmt, ap);
va_end(ap);
assert(ret >= 0);
return ret;
}
#ifdef DEBUG
#define pr_err(fmt, args...) fprintf(stderr, "%s: %s: "fmt, Name, __func__, ##args)
#else
#define pr_err(fmt, args...) fprintf(stderr, "%s: "fmt, Name, ##args)
#endif
#define cont_err(fmt ...) fprintf(stderr, " " fmt)
void *xmalloc(size_t len);
void *xrealloc(void *ptr, size_t len);
void *xcalloc(size_t num, size_t size);
char *xstrdup(const char *str);
#define LEVEL_MULTIPATH (-4)
#define LEVEL_LINEAR (-1)
#define LEVEL_FAULTY (-5)
/* kernel module doesn't know about these */
#define LEVEL_CONTAINER (-100)
#define LEVEL_UNSUPPORTED (-200)
/* the kernel does know about this one ... */
#define LEVEL_NONE (-1000000)
/* faulty stuff */
#define WriteTransient 0
#define ReadTransient 1
#define WritePersistent 2
#define ReadPersistent 3
#define WriteAll 4 /* doesn't go to device */
#define ReadFixable 5
#define Modes 6
#define ClearErrors 31
#define ClearFaults 30
#define AllPersist 100 /* internal use only */
#define NoPersist 101
#define ModeMask 0x1f
#define ModeShift 5
#ifdef __TINYC__
#undef minor
#undef major
#undef makedev
#define minor(x) ((x)&0xff)
#define major(x) (((x)>>8)&0xff)
#define makedev(M,m) (((M)<<8) | (m))
#endif
/* for raid4/5/6 */
#define ALGORITHM_LEFT_ASYMMETRIC 0
#define ALGORITHM_RIGHT_ASYMMETRIC 1
#define ALGORITHM_LEFT_SYMMETRIC 2
#define ALGORITHM_RIGHT_SYMMETRIC 3
/* Define non-rotating (raid4) algorithms. These allow
* conversion of raid4 to raid5.
*/
#define ALGORITHM_PARITY_0 4 /* P or P,Q are initial devices */
#define ALGORITHM_PARITY_N 5 /* P or P,Q are final devices. */
/* DDF RAID6 layouts differ from md/raid6 layouts in two ways.
* Firstly, the exact positioning of the parity block is slightly
* different between the 'LEFT_*' modes of md and the "_N_*" modes
* of DDF.
* Secondly, or order of datablocks over which the Q syndrome is computed
* is different.
* Consequently we have different layouts for DDF/raid6 than md/raid6.
* These layouts are from the DDFv1.2 spec.
* Interestingly DDFv1.2-Errata-A does not specify N_CONTINUE but
* leaves RLQ=3 as 'Vendor Specific'
*/
#define ALGORITHM_ROTATING_ZERO_RESTART 8 /* DDF PRL=6 RLQ=1 */
#define ALGORITHM_ROTATING_N_RESTART 9 /* DDF PRL=6 RLQ=2 */
#define ALGORITHM_ROTATING_N_CONTINUE 10 /*DDF PRL=6 RLQ=3 */
/* For every RAID5 algorithm we define a RAID6 algorithm
* with exactly the same layout for data and parity, and
* with the Q block always on the last device (N-1).
* This allows trivial conversion from RAID5 to RAID6
*/
#define ALGORITHM_LEFT_ASYMMETRIC_6 16
#define ALGORITHM_RIGHT_ASYMMETRIC_6 17
#define ALGORITHM_LEFT_SYMMETRIC_6 18
#define ALGORITHM_RIGHT_SYMMETRIC_6 19
#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
#define RESYNC_NONE -1
#define RESYNC_DELAYED -2
#define RESYNC_PENDING -3
#define RESYNC_UNKNOWN -4
/* When using "GET_DISK_INFO" it isn't certain how high
* we need to check. So we impose an absolute limit of
* MAX_DISKS. This needs to be much more than the largest
* number of devices any metadata can support. Currently
* v1.x can support 1920
*/
#define MAX_DISKS 4096
/* Sometimes the 'size' value passed needs to mean "Maximum".
* In those cases with use MAX_SIZE
*/
#define MAX_SIZE 1
/* We want to use unsigned numbers for sector counts, but need
* a value for 'invalid'. Use '1'.
*/
#define INVALID_SECTORS 1
/* And another special number needed for --data_offset=variable */
#define VARIABLE_OFFSET 3