| /* |
| * 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> |
| /* Newer glibc requires sys/sysmacros.h directly for makedev() */ |
| #include <sys/sysmacros.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 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 */ |
| |
| #ifndef MDMON_SERVICE |
| #define MDMON_SERVICE "mdmon" |
| #endif /* MDMON_SERVICE */ |
| |
| #ifndef GROW_SERVICE |
| #define GROW_SERVICE "mdadm-grow-continue" |
| #endif /* GROW_SERVICE */ |
| |
| #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> */ |
| #define __mdadm_bswap_16(x) (((x) & 0x00ffU) << 8 | \ |
| ((x) & 0xff00U) >> 8) |
| #define __mdadm_bswap_32(x) (((x) & 0x000000ffU) << 24 | \ |
| ((x) & 0xff000000U) >> 24 | \ |
| ((x) & 0x0000ff00U) << 8 | \ |
| ((x) & 0x00ff0000U) >> 8) |
| #define __mdadm_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) (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) __mdadm_bswap_16(_x) |
| #define __cpu_to_be32(_x) __mdadm_bswap_32(_x) |
| #define __cpu_to_be64(_x) __mdadm_bswap_64(_x) |
| #define __be16_to_cpu(_x) __mdadm_bswap_16(_x) |
| #define __be32_to_cpu(_x) __mdadm_bswap_32(_x) |
| #define __be64_to_cpu(_x) __mdadm_bswap_64(_x) |
| #elif BYTE_ORDER == BIG_ENDIAN |
| #define __cpu_to_le16(_x) __mdadm_bswap_16(_x) |
| #define __cpu_to_le32(_x) __mdadm_bswap_32(_x) |
| #define __cpu_to_le64(_x) __mdadm_bswap_64(_x) |
| #define __le16_to_cpu(_x) __mdadm_bswap_16(_x) |
| #define __le32_to_cpu(_x) __mdadm_bswap_32(_x) |
| #define __le64_to_cpu(_x) __mdadm_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__ */ |
| |
| /* |
| * Partially stolen from include/linux/unaligned/packed_struct.h |
| */ |
| struct __una_u16 { __u16 x; } __attribute__ ((packed)); |
| struct __una_u32 { __u32 x; } __attribute__ ((packed)); |
| |
| static inline __u16 __get_unaligned16(const void *p) |
| { |
| const struct __una_u16 *ptr = (const struct __una_u16 *)p; |
| return ptr->x; |
| } |
| |
| static inline __u32 __get_unaligned32(const void *p) |
| { |
| const struct __una_u32 *ptr = (const struct __una_u32 *)p; |
| return ptr->x; |
| } |
| |
| static inline void __put_unaligned16(__u16 val, void *p) |
| { |
| struct __una_u16 *ptr = (struct __una_u16 *)p; |
| ptr->x = val; |
| } |
| |
| static inline void __put_unaligned32(__u32 val, void *p) |
| { |
| struct __una_u32 *ptr = (struct __una_u32 *)p; |
| ptr->x = val; |
| } |
| |
| /* |
| * 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[]; |
| |
| struct md_bb_entry { |
| unsigned long long sector; |
| int length; |
| }; |
| |
| struct md_bb { |
| int supported; |
| int count; |
| struct md_bb_entry *entries; |
| }; |
| |
| /* 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; |
| |
| enum { |
| CONSISTENCY_POLICY_UNKNOWN, |
| CONSISTENCY_POLICY_NONE, |
| CONSISTENCY_POLICY_RESYNC, |
| CONSISTENCY_POLICY_BITMAP, |
| CONSISTENCY_POLICY_JOURNAL, |
| CONSISTENCY_POLICY_PPL, |
| } consistency_policy; |
| |
| /* 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 int ppl_size; |
| int ppl_offset; |
| unsigned long long ppl_sector; |
| 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[32]; |
| struct mdinfo *devs; |
| struct mdinfo *next; |
| |
| /* Device info for mdmon: */ |
| int recovery_fd; |
| int state_fd; |
| int bb_fd; |
| int ubb_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 */ |
| enum { |
| ARRAY_CLEAR, |
| ARRAY_INACTIVE, |
| ARRAY_SUSPENDED, |
| ARRAY_READONLY, |
| ARRAY_READ_AUTO, |
| ARRAY_CLEAN, |
| ARRAY_ACTIVE, |
| ARRAY_WRITE_PENDING, |
| ARRAY_ACTIVE_IDLE, |
| ARRAY_BROKEN, |
| ARRAY_UNKNOWN_STATE, |
| } array_state; |
| struct md_bb bb; |
| }; |
| |
| struct createinfo { |
| int uid; |
| int gid; |
| int autof; |
| int mode; |
| int symlinks; |
| int names; |
| int bblist; |
| struct supertype *supertype; |
| }; |
| |
| struct spare_criteria { |
| unsigned long long min_size; |
| unsigned int sector_size; |
| }; |
| |
| 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, |
| NoDevices, |
| ManageOpt, |
| Add, |
| AddSpare, |
| AddJournal, |
| Remove, |
| Fail, |
| Replace, |
| With, |
| MiscOpt, |
| WaitOpt, |
| ConfigFile, |
| ChunkSize, |
| WriteMostly, |
| FailFast, |
| NoFailFast, |
| 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, |
| ConsistencyPolicy, |
| }; |
| |
| enum prefix_standard { |
| JEDEC, |
| IEC |
| }; |
| |
| enum bitmap_update { |
| NoUpdate, |
| NameUpdate, |
| NodeNumUpdate, |
| }; |
| |
| enum flag_mode { |
| FlagDefault, FlagSet, FlagClear, |
| }; |
| |
| /* 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 no_devices; |
| 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; |
| int consistency_policy; |
| }; |
| |
| /* 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 |
| */ |
| enum flag_mode writemostly; |
| enum flag_mode failfast; |
| 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 for 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 int 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_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), |
| GET_CONSISTENCY_POLICY = (1 << 26), |
| GET_DEVS_ALL = (1 << 27), |
| }; |
| |
| /* If fd >= 0, get the array it is open on, |
| * else use devnm. |
| */ |
| extern int sysfs_open(char *devnm, char *devname, char *attr); |
| extern int sysfs_init(struct mdinfo *mdi, int fd, char *devnm); |
| extern void sysfs_init_dev(struct mdinfo *mdi, dev_t 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, int len); |
| extern int zero_disk_range(int fd, unsigned long long sector, size_t count); |
| 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 r0layout[], r5layout[], r6layout[], |
| pers[], modes[], faultylayout[]; |
| extern mapping_t consistency_policies[], sysfs_array_states[]; |
| |
| 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 to 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, |
| char *subarray); |
| void (*brief_detail_super)(struct supertype *st, char *subarray); |
| 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 |
| * failfast - set the FailFast1 bit in the superblock |
| * nofailfast - clear the FailFast1 bit |
| * 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, |
| struct shape *s, 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, |
| int verbose); |
| /* 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); |
| /* |
| * Return spare criteria for array: |
| * - minimum disk size can be used in array; |
| * - sector size can be used in array. |
| * Return values: 0 - for success and -EINVAL on error. |
| */ |
| int (*get_spare_criteria)(struct supertype *st, |
| struct spare_criteria *sc); |
| /* 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. |
| * 0: Success |
| * -Exxxx: On error |
| */ |
| int (*add_internal_bitmap)(struct supertype *st, int *chunkp, |
| int delay, int write_behind, |
| unsigned long long size, int may_change, int major); |
| /* Perform additional setup required to activate a bitmap. |
| */ |
| int (*set_bitmap)(struct supertype *st, struct mdinfo *info); |
| /* Seek 'fd' to start of write-intent-bitmap. Must be an |
| * md-native format bitmap |
| */ |
| int (*locate_bitmap)(struct supertype *st, int fd, int node_num); |
| /* 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 consistency_policy, 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, |
| char *subarray_id); /* 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); |
| |
| /* write initial empty PPL on device */ |
| int (*write_init_ppl)(struct supertype *st, struct mdinfo *info, int fd); |
| |
| /* validate ppl before assemble */ |
| int (*validate_ppl)(struct supertype *st, struct mdinfo *info, |
| struct mdinfo *disk); |
| |
| /* records new bad block in metadata */ |
| int (*record_bad_block)(struct active_array *a, int n, |
| unsigned long long sector, int length); |
| |
| /* clears bad block from metadata */ |
| int (*clear_bad_block)(struct active_array *a, int n, |
| unsigned long long sector, int length); |
| |
| /* get list of bad blocks from metadata */ |
| struct md_bb *(*get_bad_blocks)(struct active_array *a, int n); |
| |
| 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 get_dev_sector_size(int fd, char *dname, unsigned int *sectsizep); |
| extern int must_be_container(int fd); |
| extern int dev_size_from_id(dev_t id, unsigned long long *size); |
| extern int dev_sector_size_from_id(dev_t id, unsigned int *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 **paths, 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); |
| |
| extern void sysfs_rules_apply(char *devnm, struct mdinfo *dev); |
| extern void sysfsline(char *line); |
| |
| #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 Grow_consistency_policy(char *devname, int fd, |
| struct context *c, struct shape *s); |
| |
| 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 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 IsBitmapDirty(char *filename); |
| extern int Write_rules(char *rule_name); |
| extern int bitmap_update_uuid(int fd, int *uuid, int swap); |
| |
| /* calculate the size of the bitmap given the array size and bitmap chunksize */ |
| static inline unsigned long long |
| bitmap_bits(unsigned long long array_size, unsigned long chunksize) |
| { |
| return (array_size * 512 + chunksize - 1) / chunksize; |
| } |
| |
| 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); |
| |
| int md_array_valid(int fd); |
| int md_array_active(int fd); |
| int md_array_is_active(struct mdinfo *info); |
| int md_get_array_info(int fd, struct mdu_array_info_s *array); |
| int md_set_array_info(int fd, struct mdu_array_info_s *array); |
| int md_get_disk_info(int fd, struct mdu_disk_info_s *disk); |
| 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 is_near_layout_10(int layout); |
| 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 fstat_is_blkdev(int fd, char *devname, dev_t *rdev); |
| extern int stat_is_blkdev(char *devname, dev_t *rdev); |
| |
| 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 void manage_fork_fds(int close_all); |
| extern int continue_via_systemd(char *devnm, char *service_name); |
| |
| 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 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 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, |
| struct spare_criteria *criteria, |
| 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 hot_remove_disk(int mdfd, unsigned long dev, int force); |
| extern int sys_hot_remove_disk(int statefd, int force); |
| 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(dev_t devid); |
| extern char *devid2devnm(dev_t devid); |
| extern dev_t 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, int block_udev); |
| /* 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 void random_uuid(__u8 *buf); |
| 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 char *stat2kname(struct stat *st); |
| extern char *fd2kname(int fd); |
| extern char *stat2devnm(struct stat *st); |
| extern char *fd2devnm(int fd); |
| extern void udev_block(char *devnm); |
| extern void udev_unblock(void); |
| |
| 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); |
| dlm_lshandle_t (*open_lockspace)(const char *name); |
| 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_wait)(dlm_lshandle_t lockspace, uint32_t lkid, |
| uint32_t flags, struct dlm_lksb *lksb); |
| 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(void); |
| extern int cluster_release_dlmlock(void); |
| 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 |
| |
| enum r0layout { |
| RAID0_ORIG_LAYOUT = 1, |
| RAID0_ALT_MULTIZONE_LAYOUT = 2, |
| }; |
| |
| /* 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_REMOTE -4 |
| #define RESYNC_UNKNOWN -5 |
| |
| /* 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 |