| /* |
| * mdadm - manage Linux "md" devices aka RAID arrays. |
| * |
| * Copyright (C) 2001-2006 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@cse.unsw.edu.au> |
| * Paper: Neil Brown |
| * School of Computer Science and Engineering |
| * The University of New South Wales |
| * Sydney, 2052 |
| * Australia |
| */ |
| |
| #define _GNU_SOURCE |
| #define _FILE_OFFSET_BITS 64 |
| #include <unistd.h> |
| #if !defined(__dietlibc__) && !defined(__KLIBC__) |
| extern __off64_t lseek64 __P ((int __fd, __off64_t __offset, int __whence)); |
| #else |
| # if defined(__NO_STAT64) || __WORDSIZE != 32 |
| # define lseek64 lseek |
| # endif |
| #endif |
| |
| #include <sys/types.h> |
| #include <sys/stat.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 |
| |
| |
| #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_BITMAP_CHUNK 4096 |
| #define DEFAULT_BITMAP_DELAY 5 |
| #define DEFAULT_MAX_WRITE_BEHIND 256 |
| |
| #include "md_u.h" |
| #include "md_p.h" |
| #include "bitmap.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> */ |
| #define bswap_16(x) (((x) & 0x00ffU) << 8 | \ |
| ((x) & 0xff00U) >> 8) |
| #define bswap_32(x) (((x) & 0x000000ffU) << 24 | \ |
| ((x) & 0xff000000U) >> 24 | \ |
| ((x) & 0x0000ff00U) << 8 | \ |
| ((x) & 0x00ff0000U) >> 8) |
| #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) |
| |
| #if !defined(__KLIBC__) |
| #if BYTE_ORDER == LITTLE_ENDIAN |
| #define __cpu_to_le16(_x) (_x) |
| #define __cpu_to_le32(_x) (_x) |
| #define __cpu_to_le64(_x) (_x) |
| #define __le16_to_cpu(_x) (_x) |
| #define __le32_to_cpu(_x) (_x) |
| #define __le64_to_cpu(_x) (_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) |
| #else |
| # error "unknown endianness." |
| #endif |
| #endif /* __KLIBC__ */ |
| |
| |
| |
| /* 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 component_size; |
| int reshape_active; |
| unsigned long long reshape_progress; |
| int new_level, delta_disks, new_layout, new_chunk; |
| int errors; |
| int cache_size; /* size of raid456 stripe cache*/ |
| int mismatch_cnt; |
| char text_version[50]; |
| |
| char sys_name[20]; |
| struct mdinfo *devs; |
| struct mdinfo *next; |
| }; |
| |
| struct createinfo { |
| int uid; |
| int gid; |
| int autof; |
| int mode; |
| int symlinks; |
| struct supertype *supertype; |
| }; |
| |
| #define Name "mdadm" |
| |
| enum mode { |
| ASSEMBLE=1, |
| BUILD, |
| CREATE, |
| MANAGE, |
| MISC, |
| MONITOR, |
| GROW, |
| INCREMENTAL, |
| AUTODETECT, |
| }; |
| |
| 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[], |
| 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 |
| * small numbers. '1' means an undecorated option, so we start at '2'. |
| */ |
| enum special_options { |
| AssumeClean = 2, |
| BitmapChunk, |
| WriteBehind, |
| ReAdd, |
| NoDegraded, |
| Sparc22, |
| BackupFile, |
| HomeHost, |
| AutoHomeHost, |
| Symlinks, |
| AutoDetect, |
| ReserveSpace, |
| }; |
| |
| /* 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) |
| typedef struct mddev_ident_s { |
| char *devname; |
| |
| int uuid_set; |
| int uuid[4]; |
| char name[33]; |
| |
| unsigned int super_minor; |
| |
| char *devices; /* comma separated list of device |
| * names with wild cards |
| */ |
| int level; |
| unsigned int raid_disks; |
| unsigned int spare_disks; |
| struct supertype *st; |
| int autof; /* 1 for normal, 2 for partitioned */ |
| char *spare_group; |
| char *bitmap_file; |
| int bitmap_fd; |
| |
| struct mddev_ident_s *next; |
| } *mddev_ident_t; |
| |
| /* List of device names - wildcards expanded */ |
| typedef struct mddev_dev_s { |
| char *devname; |
| char disposition; /* 'a' for add, 'r' for remove, 'f' for fail. |
| * Not set for names read from .config |
| */ |
| char writemostly; /* 1 for 'set writemostly', 2 for 'clear writemostly' */ |
| char re_add; |
| char used; /* set when used */ |
| struct mddev_dev_s *next; |
| } *mddev_dev_t; |
| |
| typedef struct mapping { |
| char *name; |
| int num; |
| } mapping_t; |
| |
| |
| struct mdstat_ent { |
| char *dev; |
| int devnum; |
| int active; |
| char *level; |
| char *pattern; /* U or up, _ for down */ |
| int percent; /* -1 if no resync */ |
| int resync; /* 1 if resync, 0 if recovery */ |
| struct mdstat_ent *next; |
| }; |
| |
| extern struct mdstat_ent *mdstat_read(int hold, int start); |
| extern void free_mdstat(struct mdstat_ent *ms); |
| extern void mdstat_wait(int seconds); |
| extern int mddev_busy(int devnum); |
| |
| struct map_ent { |
| struct map_ent *next; |
| int devnum; |
| int major,minor; |
| int uuid[4]; |
| char *path; |
| }; |
| extern int map_update(struct map_ent **mpp, int devnum, int major, int minor, |
| int uuid[4], char *path); |
| extern struct map_ent *map_by_uuid(struct map_ent **map, int uuid[4]); |
| extern void map_read(struct map_ent **melp); |
| extern int map_write(struct map_ent *mel); |
| extern void map_delete(struct map_ent **mapp, int devnum); |
| extern void map_free(struct map_ent *map); |
| extern void map_add(struct map_ent **melp, |
| int devnum, int major, int minor, int uuid[4], char *path); |
| |
| /* various details can be requested */ |
| #define GET_LEVEL 1 |
| #define GET_LAYOUT 2 |
| #define GET_COMPONENT 4 |
| #define GET_CHUNK 8 |
| #define GET_CACHE 16 |
| #define GET_MISMATCH 32 |
| #define GET_VERSION 64 |
| |
| #define GET_DEVS 1024 /* gets role, major, minor */ |
| #define GET_OFFSET 2048 |
| #define GET_SIZE 4096 |
| #define GET_STATE 8192 |
| #define GET_ERROR 16384 |
| |
| /* If fd >= 0, get the array it is open on, |
| * else use devnum. >=0 -> major9. <0..... |
| */ |
| extern void sysfs_free(struct mdinfo *sra); |
| extern struct mdinfo *sysfs_read(int fd, int devnum, unsigned long options); |
| 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_get_ll(struct mdinfo *sra, struct mdinfo *dev, |
| char *name, unsigned long long *val); |
| |
| |
| 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); |
| 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); |
| |
| #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[], pers[], modes[], faultylayout[]; |
| |
| extern char *map_dev(int major, int minor, int create); |
| |
| |
| extern struct superswitch { |
| void (*examine_super)(struct supertype *st, char *homehost); |
| void (*brief_examine_super)(struct supertype *st); |
| void (*export_examine_super)(struct supertype *st); |
| void (*detail_super)(struct supertype *st, char *homehost); |
| void (*brief_detail_super)(struct supertype *st); |
| void (*export_detail_super)(struct supertype *st); |
| void (*uuid_from_super)(struct supertype *st, int uuid[4]); |
| void (*getinfo_super)(struct supertype *st, struct mdinfo *info); |
| int (*match_home)(struct supertype *st, char *homehost); |
| int (*update_super)(struct supertype *st, struct mdinfo *info, |
| char *update, |
| char *devname, int verbose, |
| int uuid_set, char *homehost); |
| int (*init_super)(struct supertype *st, mdu_array_info_t *info, |
| unsigned long long size, char *name, |
| char *homehost, int *uuid, |
| unsigned long reserve_space); |
| void (*add_to_super)(struct supertype *st, mdu_disk_info_t *dinfo); |
| int (*store_super)(struct supertype *st, int fd); |
| int (*write_init_super)(struct supertype *st, mdu_disk_info_t *dinfo, |
| char *devname); |
| int (*compare_super)(struct supertype *st, struct supertype *tst); |
| int (*load_super)(struct supertype *st, int fd, char *devname); |
| struct supertype * (*match_metadata_desc)(char *arg); |
| __u64 (*avail_size)(struct supertype *st, __u64 size, |
| unsigned long reserve_space); |
| int (*add_internal_bitmap)(struct supertype *st, int *chunkp, |
| int delay, int write_behind, |
| unsigned long long size, int may_change, int major); |
| void (*locate_bitmap)(struct supertype *st, int fd); |
| int (*write_bitmap)(struct supertype *st, int fd); |
| void (*free_super)(struct supertype *st); |
| int major; |
| int swapuuid; /* true if uuid is bigending rather than hostendian */ |
| } super0, super1, *superlist[]; |
| |
| struct supertype { |
| struct superswitch *ss; |
| int minor_version; |
| int max_devs; |
| void *sb; |
| }; |
| |
| extern struct supertype *super_by_fd(int fd); |
| extern struct supertype *guess_super(int fd); |
| extern struct supertype *dup_super(struct supertype *st); |
| extern int get_dev_size(int fd, char *dname, unsigned long long *sizep); |
| extern void get_one_disk(int mdfd, mdu_array_info_t *ainf, |
| mdu_disk_info_t *disk); |
| |
| #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_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); |
| 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); |
| extern int Grow_restart(struct supertype *st, struct mdinfo *info, |
| int *fdlist, int cnt, char *backup_file); |
| |
| |
| extern int Assemble(struct supertype *st, char *mddev, int mdfd, |
| mddev_ident_t ident, |
| mddev_dev_t devlist, char *backup_file, |
| int readonly, int runstop, |
| char *update, char *homehost, |
| int verbose, int force); |
| |
| extern int Build(char *mddev, int mdfd, 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, unsigned long long size); |
| |
| |
| extern int Create(struct supertype *st, char *mddev, int mdfd, |
| int chunk, int level, int layout, unsigned long long size, int raiddisks, int sparedisks, |
| char *name, char *homehost, int *uuid, |
| int subdevs, mddev_dev_t devlist, |
| int runstop, int verbose, int force, int assume_clean, |
| char *bitmap_file, int bitmap_chunk, int write_behind, int delay, |
| unsigned long reserve_space); |
| |
| extern int Detail(char *dev, int brief, int export, int test, char *homehost); |
| extern int Query(char *dev); |
| extern int Examine(mddev_dev_t devlist, int brief, int export, int scan, |
| int SparcAdjust, struct supertype *forcest, char *homehost); |
| 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); |
| |
| extern int Kill(char *dev, int force, int quiet); |
| extern int Wait(char *dev); |
| |
| extern int Incremental(char *devname, int verbose, int runstop, |
| struct supertype *st, char *homehost, int autof); |
| extern void RebuildMap(void); |
| extern int IncrementalScan(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 bitmap_update_uuid(int fd, int *uuid, int swap); |
| extern unsigned long bitmap_sectors(struct bitmap_super_s *bsb); |
| |
| extern int md_get_version(int fd); |
| extern int get_linux_version(void); |
| extern int parse_uuid(char *str, int uuid[4]); |
| 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 get_mdp_major(void); |
| extern int dev_open(char *dev, int flags); |
| extern int is_standard(char *dev, int *nump); |
| |
| extern int parse_auto(char *str, char *msg, int config); |
| 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 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_line(FILE *file); |
| extern char *conf_word(FILE *file, int allow_key); |
| 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 int same_uuid(int a[4], int b[4], int swapuuid); |
| extern void copy_uuid(void *a, int b[4], int swapuuid); |
| extern unsigned long calc_csum(void *super, int bytes); |
| extern int enough(int level, int raid_disks, int layout, int clean, |
| char *avail, int avail_disks); |
| extern int ask(char *mesg); |
| extern unsigned long long get_component_size(int fd); |
| extern void remove_partitions(int fd); |
| |
| |
| extern char *human_size(long long bytes); |
| extern char *human_size_brief(long long bytes); |
| extern void print_r10_layout(int layout); |
| |
| #define NoMdDev (1<<23) |
| extern int find_free_devnum(int use_partitions); |
| |
| extern void put_md_name(char *name); |
| extern char *get_md_name(int dev); |
| |
| extern char DefaultConfFile[]; |
| |
| extern int open_mddev(char *dev, int autof); |
| extern int open_mddev_devnum(char *devname, int devnum, char *name, |
| char *chosen_name, int parts); |
| |
| #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; |
| } |
| |
| #define LEVEL_MULTIPATH (-4) |
| #define LEVEL_LINEAR (-1) |
| #define LEVEL_FAULTY (-5) |
| |
| |
| /* 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 raid5 */ |
| #define ALGORITHM_LEFT_ASYMMETRIC 0 |
| #define ALGORITHM_RIGHT_ASYMMETRIC 1 |
| #define ALGORITHM_LEFT_SYMMETRIC 2 |
| #define ALGORITHM_RIGHT_SYMMETRIC 3 |