/* * mdadm - manage Linux "md" devices aka RAID arrays. * * Copyright (C) 2001-2009 Neil Brown * * * 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: */ #define _GNU_SOURCE #define _FILE_OFFSET_BITS 64 #include #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 #include #include #include #include #include #include #include #include #include #include #ifdef __dietlibc__ #include /* dietlibc has deprecated random and srandom!! */ #define random rand #define srandom srand #endif #include /*#include */ #include #include #include #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 /* VAR_RUN is where pid and socket files used for communicating * with mdmon normally live. It should be /var/run, but if * it is too hard to remount /var/run as read-only rather than * unmounting it at shutdown time, then it should be * redefined to some place that comfortably persists until * final shutdown, possibly in /dev if that is a tmpfs. * Note: VAR_RUN does not need to be writable at shutdown, * only during boot when "mdmon --takeover" is run. */ #ifndef VAR_RUN #define VAR_RUN "/var/run/mdadm" #endif /* VAR_RUN */ /* ALT_RUN should be somewhere that persists across the pivotroot * from early boot to late boot. * If you don't have /lib/init/rw you might want to use /dev/.something */ #ifndef ALT_RUN #define ALT_RUN "/lib/init/rw/mdadm" #endif /* ALT_RUN */ #ifndef ALT_MAPFILE #define ALT_MAPFILE "map" #endif /* ALT_MAPFILE */ #include "md_u.h" #include "md_p.h" #include "bitmap.h" #include "msg.h" #include /* Redhat don't like to #include , and * some time include isn't enough, * and there is no standard conversion function so... */ /* And dietlibc doesn't think byteswap is ok, so.. */ /* #include */ #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) #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) (_x) #define __cpu_to_be32(_x) (_x) #define __cpu_to_be64(_x) (_x) #define __be16_to_cpu(_x) (_x) #define __be32_to_cpu(_x) (_x) #define __be64_to_cpu(_x) (_x) #else # error "unknown endianness." #endif #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 { 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; /* 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; 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*/ 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 #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; }; 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'. * (note we must stop before we get to 65 i.e. 'A') */ enum special_options { AssumeClean = 2, BitmapChunk, WriteBehind, ReAdd, NoDegraded, Sparc22, BackupFile, /* 8 */ HomeHost, AutoHomeHost, Symlinks, AutoDetect, Waitclean, DetailPlatform, KillSubarray, UpdateSubarray, /* 16 */ }; /* 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; 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_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 */ 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 mdinfo *content; /* If devname is a container, this might list * the remaining member arrays. */ 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 */ int devcnt; int raid_disks; int chunk_size; 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 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(int devnum); extern struct mdstat_ent *mdstat_by_component(char *name); struct map_ent { struct map_ent *next; int devnum; char metadata[20]; int uuid[4]; int bad; char *path; }; 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); 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, char *metadata, int uuid[4], char *path); extern int map_lock(struct map_ent **melp); extern void map_unlock(struct map_ent **melp); /* 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_DEVS = (1 << 10), /* gets role, major, minor */ GET_OFFSET = (1 << 11), GET_SIZE = (1 << 12), GET_STATE = (1 << 13), GET_ERROR = (1 << 14), }; /* If fd >= 0, get the array it is open on, * else use devnum. >=0 -> major9. <0..... */ extern int sysfs_open(int devnum, char *devname, char *attr); extern void sysfs_init(struct mdinfo *mdi, int fd, int devnum); extern void sysfs_free(struct mdinfo *sra); extern struct mdinfo *sysfs_read(int fd, int devnum, 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_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 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, 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); #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(int major, int minor, int create); struct active_array; struct metadata_update; /* A superswitch provides entry point the a metadata handler. * * The super_switch 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); /* 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); /* 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 */ void (*getinfo_super)(struct supertype *st, struct mdinfo *info); /* 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. */ 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); /* 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); /* 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); 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); 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); /* validate_geometry is called with an st returned by * match_metadata_desc. * It should check that the geometry described in 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 bytes. */ int (*validate_geometry)(struct supertype *st, int level, int layout, int raiddisks, int chunk, unsigned long long size, char *subdev, unsigned long long *freesize, int verbose); 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, 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); void (*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); int swapuuid; /* true if uuid is bigending rather than hostendian */ int external; const char *name; /* canonical metadata name */ } super0, super1, super_ddf, *superlist[]; extern struct superswitch super_imsm; struct metadata_update { int len; char *buf; void *space; /* allocated space that monitor will use */ 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; int container_dev; /* devnum of container */ char subarray[32]; /* name of array inside container */ void *sb; void *info; int loaded_container; /* Set if load_super found a container, * not just one device */ struct metadata_update *updates; struct metadata_update **update_tail; /* extra stuff used by mdmon */ struct active_array *arrays; int sock; /* listen to external programs */ int devnum; char *devname; /* e.g. md0. This appears in metadata_verison: * external:/md0/12 */ int devcnt; struct mdinfo *devs; }; 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); void wait_for(char *dev, int fd); #if __GNUC__ < 3 struct stat64; #endif #define HAVE_NFTW we assume #define HAVE_FTW #ifdef __UCLIBC__ # include # 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 #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_subdevs(char *devname, int fd, 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, 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 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, 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, unsigned long long size); extern int Create(struct supertype *st, char *mddev, 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, int autof); extern int Detail(char *dev, int brief, int export, int test, char *homehost); extern int Detail_Platform(struct superswitch *ss, int scan, int verbose); 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, int increments); 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 sock, int verbose); extern int Incremental(char *devname, int verbose, int runstop, 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, 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 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 int open_dev(int devnum); extern int open_dev_excl(int devnum); extern int is_standard(char *dev, int *nump); extern int same_dev(char *one, char *two); 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 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(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 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 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 void append_metadata_update(struct supertype *st, void *buf, int len); extern int assemble_container_content(struct supertype *st, int mdfd, struct mdinfo *content, int runstop, char *chosen_name, int verbose); 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); 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 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 is_container_member(struct mdstat_ent *ent, char *devname); extern int is_subarray_active(char *subarray, char *devname); extern int open_subarray(char *dev, struct supertype *st, int quiet); extern struct superswitch *version_to_superswitch(char *vers); extern char *pid_dir; extern int mdmon_running(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); extern int devname2devnum(char *name); extern int stat2devnum(struct stat *st); extern int fd2devnum(int fd); static inline int dev2major(int d) { if (d >= 0) return MD_MAJOR; else return get_mdp_major(); } static inline int dev2minor(int d) { if (d >= 0) return d; return (-1-d) << MdpMinorShift; } static inline int ROUND_UP(int a, int base) { return ((a+base-1)/base)*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 read-only arrays. * containername is e.g. md0, md_d1 * componentname is dependant on the metadata. e.g. '1' 'S1' ... */ return (*vers == '/' || *vers == '-'); } #ifdef DEBUG #define dprintf(fmt, arg...) \ fprintf(stderr, fmt, ##arg) #else #define dprintf(fmt, arg...) \ ({ if (0) fprintf(stderr, fmt, ##arg); 0; }) #endif #include #include 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) /* kernel module doesn't know about these */ #define LEVEL_CONTAINER (-100) #define LEVEL_UNSUPPORTED (-200) /* 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