05697ec1e2
When an array is created, if the homehost is know, the superblock gets it, either in the uuid, (via sha1) or in the name field. Signed-off-by: Neil Brown <neilb@suse.de>
463 lines
13 KiB
C
463 lines
13 KiB
C
/*
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* mdadm - manage Linux "md" devices aka RAID arrays.
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*
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* Copyright (C) 2001-2006 Neil Brown <neilb@suse.de>
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Author: Neil Brown
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* Email: <neilb@cse.unsw.edu.au>
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* Paper: Neil Brown
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* School of Computer Science and Engineering
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* The University of New South Wales
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* Sydney, 2052
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* Australia
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*/
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#define _GNU_SOURCE
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#include <unistd.h>
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#ifndef __dietlibc__
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extern __off64_t lseek64 __P ((int __fd, __off64_t __offset, int __whence));
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#endif
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <stdlib.h>
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#include <time.h>
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#include <sys/time.h>
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#include <getopt.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <errno.h>
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#include <string.h>
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#include <syslog.h>
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#ifdef __dietlibc__NONO
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int strncmp(const char *s1, const char *s2, size_t n) __THROW __pure__;
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char *strncpy(char *dest, const char *src, size_t n) __THROW;
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#include <strings.h>
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#endif
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#include <linux/kdev_t.h>
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/*#include <linux/fs.h> */
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#include <sys/mount.h>
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#include <asm/types.h>
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#include <sys/ioctl.h>
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#define MD_MAJOR 9
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#define MdpMinorShift 6
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#ifndef BLKGETSIZE64
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#define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 *arg) */
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#endif
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#define DEFAULT_BITMAP_CHUNK 4096
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#define DEFAULT_BITMAP_DELAY 5
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#define DEFAULT_MAX_WRITE_BEHIND 256
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#include "md_u.h"
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#include "md_p.h"
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#include "bitmap.h"
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#include <endian.h>
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/* #include "asm/byteorder.h" Redhat don't like this so... */
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#if __BYTE_ORDER == __LITTLE_ENDIAN
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# include <linux/byteorder/little_endian.h>
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#elif __BYTE_ORDER == __BIG_ENDIAN
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# include <linux/byteorder/big_endian.h>
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#elif __BYTE_ORDER == __PDP_ENDIAN
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# include <linux/byteorder/pdp_endian.h>
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#else
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# error "unknown endianness."
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#endif
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/* general information that might be extracted from a superblock */
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struct mdinfo {
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mdu_array_info_t array;
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mdu_disk_info_t disk;
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__u64 events;
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int uuid[4];
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char name[33];
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unsigned long long data_offset;
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unsigned long long component_size;
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int reshape_active;
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unsigned long long reshape_progress;
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int new_level, delta_disks, new_layout, new_chunk;
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};
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struct createinfo {
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int uid;
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int gid;
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int autof;
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int mode;
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};
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#define Name "mdadm"
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enum mode {
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ASSEMBLE=1,
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BUILD,
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CREATE,
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MANAGE,
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MISC,
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MONITOR,
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GROW,
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};
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extern char short_options[];
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extern char short_bitmap_auto_options[];
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extern struct option long_options[];
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extern char Version[], Usage[], Help[], OptionHelp[],
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Help_create[], Help_build[], Help_assemble[], Help_grow[],
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Help_manage[], Help_misc[], Help_monitor[], Help_config[];
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/* for option that don't have short equivilents, we assign arbitrary
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* small numbers. '1' means an undecorated option, so we start at '2'.
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*/
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enum special_options {
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AssumeClean = 2,
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BitmapChunk,
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WriteBehind,
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ReAdd,
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NoDegraded,
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Sparc22,
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BackupFile,
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HomeHost,
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};
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/* structures read from config file */
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/* List of mddevice names and identifiers
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* Identifiers can be:
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* uuid=128-hex-uuid
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* super-minor=decimal-minor-number-from-superblock
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* devices=comma,separated,list,of,device,names,with,wildcards
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*
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* If multiple fields are present, the intersection of all matching
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* devices is considered
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*/
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#define UnSet (0xfffe)
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typedef struct mddev_ident_s {
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char *devname;
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int uuid_set;
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int uuid[4];
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char name[33];
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unsigned int super_minor;
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char *devices; /* comma separated list of device
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* names with wild cards
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*/
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int level;
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unsigned int raid_disks;
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unsigned int spare_disks;
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struct supertype *st;
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int autof; /* 1 for normal, 2 for partitioned */
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char *spare_group;
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char *bitmap_file;
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int bitmap_fd;
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struct mddev_ident_s *next;
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} *mddev_ident_t;
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/* List of device names - wildcards expanded */
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typedef struct mddev_dev_s {
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char *devname;
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char disposition; /* 'a' for add, 'r' for remove, 'f' for fail.
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* Not set for names read from .config
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*/
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char writemostly;
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char re_add;
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struct mddev_dev_s *next;
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} *mddev_dev_t;
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typedef struct mapping {
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char *name;
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int num;
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} mapping_t;
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struct mdstat_ent {
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char *dev;
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int devnum;
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int active;
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char *level;
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char *pattern; /* U or up, _ for down */
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int percent; /* -1 if no resync */
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int resync; /* 1 if resync, 0 if recovery */
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struct mdstat_ent *next;
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};
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extern struct mdstat_ent *mdstat_read(int hold, int start);
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extern void free_mdstat(struct mdstat_ent *ms);
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extern void mdstat_wait(int seconds);
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/* Data structure for holding info read from sysfs */
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struct sysdev {
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char name[20];
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int role;
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int major, minor;
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unsigned long long offset, size;
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int state;
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int errors;
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struct sysdev *next;
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};
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struct sysarray {
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char name[20];
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struct sysdev *devs;
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int chunk;
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unsigned long long component_size;
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int layout;
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int level;
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int spares;
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};
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/* various details can be requested */
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#define GET_LEVEL 1
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#define GET_LAYOUT 2
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#define GET_COMPONENT 4
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#define GET_CHUNK 8
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#define GET_DEVS 1024 /* gets role, major, minor */
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#define GET_OFFSET 2048
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#define GET_SIZE 4096
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#define GET_STATE 8192
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#define GET_ERROR 16384
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/* If fd >= 0, get the array it is open on,
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* else use devnum. >=0 -> major9. <0.....
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*/
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extern struct sysarray *sysfs_read(int fd, int devnum, unsigned long options);
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extern int sysfs_set_str(struct sysarray *sra, struct sysdev *dev,
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char *name, char *val);
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extern int sysfs_set_num(struct sysarray *sra, struct sysdev *dev,
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char *name, unsigned long long val);
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extern int sysfs_get_ll(struct sysarray *sra, struct sysdev *dev,
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char *name, unsigned long long *val);
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extern int save_stripes(int *source, unsigned long long *offsets,
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int raid_disks, int chunk_size, int level, int layout,
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int nwrites, int *dest,
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unsigned long long start, unsigned long long length);
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extern int restore_stripes(int *dest, unsigned long long *offsets,
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int raid_disks, int chunk_size, int level, int layout,
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int source, unsigned long long read_offset,
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unsigned long long start, unsigned long long length);
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#ifndef Sendmail
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#define Sendmail "/usr/lib/sendmail -t"
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#endif
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#define SYSLOG_FACILITY LOG_DAEMON
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extern char *map_num(mapping_t *map, int num);
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extern int map_name(mapping_t *map, char *name);
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extern mapping_t r5layout[], pers[], modes[], faultylayout[];
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extern char *map_dev(int major, int minor, int create);
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extern struct superswitch {
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void (*examine_super)(void *sbv);
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void (*brief_examine_super)(void *sbv);
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void (*detail_super)(void *sbv);
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void (*brief_detail_super)(void *sbv);
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void (*uuid_from_super)(int uuid[4], void *sbv);
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void (*getinfo_super)(struct mdinfo *info, void *sbv);
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int (*update_super)(struct mdinfo *info, void *sbv, char *update, char *devname, int verbose);
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__u64 (*event_super)(void *sbv);
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int (*init_super)(struct supertype *st, void **sbp, mdu_array_info_t *info, unsigned long long size, char *name, char *homehost);
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void (*add_to_super)(void *sbv, mdu_disk_info_t *dinfo);
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int (*store_super)(struct supertype *st, int fd, void *sbv);
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int (*write_init_super)(struct supertype *st, void *sbv, mdu_disk_info_t *dinfo, char *devname);
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int (*compare_super)(void **firstp, void *secondv);
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int (*load_super)(struct supertype *st, int fd, void **sbp, char *devname);
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struct supertype * (*match_metadata_desc)(char *arg);
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__u64 (*avail_size)(struct supertype *st, __u64 size);
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int (*add_internal_bitmap)(struct supertype *st, void *sbv, int chunk, int delay, int write_behind,
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unsigned long long size, int may_change, int major);
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void (*locate_bitmap)(struct supertype *st, int fd, void *sbv);
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int (*write_bitmap)(struct supertype *st, int fd, void *sbv);
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int major;
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int swapuuid; /* true if uuid is bigending rather than hostendian */
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} super0, super1, *superlist[];
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struct supertype {
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struct superswitch *ss;
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int minor_version;
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int max_devs;
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};
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extern struct supertype *super_by_version(int vers, int minor);
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extern struct supertype *guess_super(int fd);
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#if __GNUC__ < 3
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struct stat64;
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#endif
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#ifdef UCLIBC
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struct FTW {};
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# define FTW_PHYS 1
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#else
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# include <ftw.h>
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# ifdef __dietlibc__
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# define FTW_PHYS 1
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# endif
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#endif
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extern int add_dev(const char *name, const struct stat *stb, int flag, struct FTW *s);
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extern int Manage_ro(char *devname, int fd, int readonly);
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extern int Manage_runstop(char *devname, int fd, int runstop, int quiet);
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extern int Manage_resize(char *devname, int fd, long long size, int raid_disks);
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extern int Manage_reconfig(char *devname, int fd, int layout);
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extern int Manage_subdevs(char *devname, int fd,
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mddev_dev_t devlist, int verbose);
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extern int Grow_Add_device(char *devname, int fd, char *newdev);
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extern int Grow_addbitmap(char *devname, int fd, char *file, int chunk, int delay, int write_behind, int force);
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extern int Grow_reshape(char *devname, int fd, int quiet, char *backup_file,
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long long size,
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int level, int layout, int chunksize, int raid_disks);
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extern int Grow_restart(struct supertype *st, struct mdinfo *info,
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int *fdlist, int cnt, char *backup_file);
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extern int Assemble(struct supertype *st, char *mddev, int mdfd,
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mddev_ident_t ident,
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char *conffile,
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mddev_dev_t devlist, char *backup_file,
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int readonly, int runstop,
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char *update,
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int verbose, int force);
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extern int Build(char *mddev, int mdfd, int chunk, int level, int layout,
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int raiddisks,
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mddev_dev_t devlist, int assume_clean,
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char *bitmap_file, int bitmap_chunk, int write_behind, int delay, int verbose);
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extern int Create(struct supertype *st, char *mddev, int mdfd,
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int chunk, int level, int layout, unsigned long long size, int raiddisks, int sparedisks,
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char *name, char *homehost,
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int subdevs, mddev_dev_t devlist,
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int runstop, int verbose, int force, int assume_clean,
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char *bitmap_file, int bitmap_chunk, int write_behind, int delay);
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extern int Detail(char *dev, int brief, int test);
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extern int Query(char *dev);
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extern int Examine(mddev_dev_t devlist, int brief, int scan, int SparcAdjust,
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struct supertype *forcest);
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extern int Monitor(mddev_dev_t devlist,
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char *mailaddr, char *alert_cmd,
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int period, int daemonise, int scan, int oneshot,
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int dosyslog, char *config, int test, char *pidfile);
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extern int Kill(char *dev, int force, int quiet);
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extern int CreateBitmap(char *filename, int force, char uuid[16],
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unsigned long chunksize, unsigned long daemon_sleep,
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unsigned long write_behind,
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unsigned long long array_size,
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int major);
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extern int ExamineBitmap(char *filename, int brief, struct supertype *st);
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extern void bitmap_update_uuid(int fd, int *uuid);
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extern int md_get_version(int fd);
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extern int get_linux_version(void);
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extern int parse_uuid(char *str, int uuid[4]);
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extern int check_ext2(int fd, char *name);
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extern int check_reiser(int fd, char *name);
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extern int check_raid(int fd, char *name);
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extern int get_mdp_major(void);
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extern int dev_open(char *dev, int flags);
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extern int is_standard(char *dev, int *nump);
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extern int parse_auto(char *str, char *msg, int config);
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extern mddev_ident_t conf_get_ident(char *conffile, char *dev);
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extern mddev_dev_t conf_get_devs(char *conffile);
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extern struct createinfo *conf_get_create_info(char *conffile);
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extern char *conf_get_mailaddr(char *conffile);
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extern char *conf_get_mailfrom(char *conffile);
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extern char *conf_get_program(char *conffile);
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extern char *conf_get_homehost(char *conffile);
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extern char *conf_line(FILE *file);
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extern char *conf_word(FILE *file, int allow_key);
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extern void free_line(char *line);
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extern int match_oneof(char *devices, char *devname);
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extern void uuid_from_super(int uuid[4], mdp_super_t *super);
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extern int same_uuid(int a[4], int b[4], int swapuuid);
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/* extern int compare_super(mdp_super_t *first, mdp_super_t *second);*/
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extern unsigned long calc_csum(void *super, int bytes);
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extern int enough(int level, int raid_disks, int layout,
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char *avail, int avail_disks);
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extern int ask(char *mesg);
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extern unsigned long long get_component_size(int fd);
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extern char *human_size(long long bytes);
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char *human_size_brief(long long bytes);
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extern void put_md_name(char *name);
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extern char *get_md_name(int dev);
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extern char DefaultConfFile[];
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extern int open_mddev(char *dev, int autof);
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#define LEVEL_MULTIPATH (-4)
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#define LEVEL_LINEAR (-1)
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#define LEVEL_FAULTY (-5)
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/* faulty stuff */
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#define WriteTransient 0
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#define ReadTransient 1
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#define WritePersistent 2
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#define ReadPersistent 3
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#define WriteAll 4 /* doesn't go to device */
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#define ReadFixable 5
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#define Modes 6
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#define ClearErrors 31
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#define ClearFaults 30
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#define AllPersist 100 /* internal use only */
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#define NoPersist 101
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#define ModeMask 0x1f
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#define ModeShift 5
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#ifdef __TINYC__
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#undef minor
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#undef major
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#undef makedev
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#define minor(x) ((x)&0xff)
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#define major(x) (((x)>>8)&0xff)
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#define makedev(M,m) (((M)<<8) | (m))
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#endif
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/* for raid5 */
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#define ALGORITHM_LEFT_ASYMMETRIC 0
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#define ALGORITHM_RIGHT_ASYMMETRIC 1
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#define ALGORITHM_LEFT_SYMMETRIC 2
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#define ALGORITHM_RIGHT_SYMMETRIC 3
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