1911 lines
62 KiB
C
1911 lines
62 KiB
C
/*
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* mdadm - manage Linux "md" devices aka RAID arrays.
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*
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* Copyright (C) 2001-2009 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@suse.de>
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*/
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#define _GNU_SOURCE
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#define _FILE_OFFSET_BITS 64
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#include <unistd.h>
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#ifdef __GLIBC__
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extern __off64_t lseek64 __P ((int __fd, __off64_t __offset, int __whence));
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#elif !defined(lseek64)
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# if defined(__NO_STAT64) || __WORDSIZE != 32
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# define lseek64 lseek
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# endif
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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 <stdint.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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#include <stdbool.h>
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#include <signal.h>
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/* Newer glibc requires sys/sysmacros.h directly for makedev() */
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#include <sys/sysmacros.h>
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#ifdef __dietlibc__
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#include <strings.h>
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/* dietlibc has deprecated random and srandom!! */
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#define random rand
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#define srandom srand
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#endif
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#ifdef NO_COROSYNC
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#define CS_OK 1
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typedef uint64_t cmap_handle_t;
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#else
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#include <corosync/cmap.h>
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#endif
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#ifndef NO_DLM
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#include <libdlm.h>
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#include <errno.h>
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#else
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#define LKF_NOQUEUE 0x00000001
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#define LKM_PWMODE 4
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#define EUNLOCK 0x10002
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typedef void *dlm_lshandle_t;
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struct dlm_lksb {
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int sb_status;
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uint32_t sb_lkid;
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char sb_flags;
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char *sb_lvbptr;
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};
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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_CHUNK 512
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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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/* MAP_DIR should be somewhere that persists across the pivotroot
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* from early boot to late boot.
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* /run seems to have emerged as the best standard.
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*/
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#ifndef MAP_DIR
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#define MAP_DIR "/run/mdadm"
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#endif /* MAP_DIR */
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/* MAP_FILE is what we name the map file we put in MAP_DIR, in case you
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* want something other than the default of "map"
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*/
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#ifndef MAP_FILE
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#define MAP_FILE "map"
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#endif /* MAP_FILE */
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/* MDMON_DIR is where pid and socket files used for communicating
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* with mdmon normally live. Best is /var/run/mdadm as
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* mdmon is needed at early boot then it needs to write there prior
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* to /var/run being mounted read/write, and it also then needs to
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* persist beyond when /var/run is mounter read-only. So, to be
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* safe, the default is somewhere that is read/write early in the
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* boot process and stays up as long as possible during shutdown.
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*/
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#ifndef MDMON_DIR
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#define MDMON_DIR "/run/mdadm"
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#endif /* MDMON_DIR */
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/* FAILED_SLOTS is where to save files storing recent removal of array
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* member in order to allow future reuse of disk inserted in the same
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* slot for array recovery
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*/
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#ifndef FAILED_SLOTS_DIR
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#define FAILED_SLOTS_DIR "/run/mdadm/failed-slots"
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#endif /* FAILED_SLOTS */
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#ifndef MDMON_SERVICE
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#define MDMON_SERVICE "mdmon"
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#endif /* MDMON_SERVICE */
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#ifndef GROW_SERVICE
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#define GROW_SERVICE "mdadm-grow-continue"
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#endif /* GROW_SERVICE */
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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 "msg.h"
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#include <endian.h>
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/* Redhat don't like to #include <asm/byteorder.h>, and
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* some time include <linux/byteorder/xxx_endian.h> isn't enough,
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* and there is no standard conversion function so... */
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/* And dietlibc doesn't think byteswap is ok, so.. */
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/* #include <byteswap.h> */
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#define __mdadm_bswap_16(x) (((x) & 0x00ffU) << 8 | \
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((x) & 0xff00U) >> 8)
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#define __mdadm_bswap_32(x) (((x) & 0x000000ffU) << 24 | \
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((x) & 0xff000000U) >> 24 | \
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((x) & 0x0000ff00U) << 8 | \
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((x) & 0x00ff0000U) >> 8)
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#define __mdadm_bswap_64(x) (((x) & 0x00000000000000ffULL) << 56 | \
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((x) & 0xff00000000000000ULL) >> 56 | \
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((x) & 0x000000000000ff00ULL) << 40 | \
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((x) & 0x00ff000000000000ULL) >> 40 | \
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((x) & 0x0000000000ff0000ULL) << 24 | \
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((x) & 0x0000ff0000000000ULL) >> 24 | \
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((x) & 0x00000000ff000000ULL) << 8 | \
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((x) & 0x000000ff00000000ULL) >> 8)
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#if !defined(__KLIBC__)
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#if BYTE_ORDER == LITTLE_ENDIAN
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#define __cpu_to_le16(_x) (unsigned int)(_x)
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#define __cpu_to_le32(_x) (unsigned int)(_x)
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#define __cpu_to_le64(_x) (unsigned long long)(_x)
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#define __le16_to_cpu(_x) (unsigned int)(_x)
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#define __le32_to_cpu(_x) (unsigned int)(_x)
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#define __le64_to_cpu(_x) (unsigned long long)(_x)
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#define __cpu_to_be16(_x) __mdadm_bswap_16(_x)
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#define __cpu_to_be32(_x) __mdadm_bswap_32(_x)
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#define __cpu_to_be64(_x) __mdadm_bswap_64(_x)
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#define __be16_to_cpu(_x) __mdadm_bswap_16(_x)
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#define __be32_to_cpu(_x) __mdadm_bswap_32(_x)
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#define __be64_to_cpu(_x) __mdadm_bswap_64(_x)
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#elif BYTE_ORDER == BIG_ENDIAN
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#define __cpu_to_le16(_x) __mdadm_bswap_16(_x)
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#define __cpu_to_le32(_x) __mdadm_bswap_32(_x)
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#define __cpu_to_le64(_x) __mdadm_bswap_64(_x)
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#define __le16_to_cpu(_x) __mdadm_bswap_16(_x)
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#define __le32_to_cpu(_x) __mdadm_bswap_32(_x)
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#define __le64_to_cpu(_x) __mdadm_bswap_64(_x)
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#define __cpu_to_be16(_x) (unsigned int)(_x)
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#define __cpu_to_be32(_x) (unsigned int)(_x)
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#define __cpu_to_be64(_x) (unsigned long long)(_x)
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#define __be16_to_cpu(_x) (unsigned int)(_x)
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#define __be32_to_cpu(_x) (unsigned int)(_x)
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#define __be64_to_cpu(_x) (unsigned long long)(_x)
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#else
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# error "unknown endianness."
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#endif
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#endif /* __KLIBC__ */
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/*
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* Partially stolen from include/linux/unaligned/packed_struct.h
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*/
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struct __una_u16 { __u16 x; } __attribute__ ((packed));
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struct __una_u32 { __u32 x; } __attribute__ ((packed));
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static inline __u16 __get_unaligned16(const void *p)
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{
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const struct __una_u16 *ptr = (const struct __una_u16 *)p;
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return ptr->x;
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}
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static inline __u32 __get_unaligned32(const void *p)
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{
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const struct __una_u32 *ptr = (const struct __una_u32 *)p;
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return ptr->x;
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}
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static inline void __put_unaligned16(__u16 val, void *p)
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{
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struct __una_u16 *ptr = (struct __una_u16 *)p;
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ptr->x = val;
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}
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static inline void __put_unaligned32(__u32 val, void *p)
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{
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struct __una_u32 *ptr = (struct __una_u32 *)p;
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ptr->x = val;
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}
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/*
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* Check at compile time that something is of a particular type.
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* Always evaluates to 1 so you may use it easily in comparisons.
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*/
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#define typecheck(type,x) \
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({ type __dummy; \
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typeof(x) __dummy2; \
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(void)(&__dummy == &__dummy2); \
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1; \
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})
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/*
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* These inlines deal with timer wrapping correctly.
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*
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* time_after(a,b) returns true if the time a is after time b.
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*/
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#define time_after(a,b) \
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(typecheck(unsigned int, a) && \
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typecheck(unsigned int, b) && \
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((int)((b) - (a)) < 0))
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#define time_before(a,b) time_after(b,a)
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/*
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* min()/max()/clamp() macros that also do
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* strict type-checking.. See the
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* "unnecessary" pointer comparison.
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*/
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#define min(x, y) ({ \
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typeof(x) _min1 = (x); \
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typeof(y) _min2 = (y); \
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(void) (&_min1 == &_min2); \
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_min1 < _min2 ? _min1 : _min2; })
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#define max(x, y) ({ \
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typeof(x) _max1 = (x); \
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typeof(y) _max2 = (y); \
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(void) (&_max1 == &_max2); \
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_max1 > _max2 ? _max1 : _max2; })
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#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
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extern const char Name[];
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struct md_bb_entry {
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unsigned long long sector;
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int length;
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};
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struct md_bb {
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int supported;
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int count;
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struct md_bb_entry *entries;
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};
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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 new_data_offset;
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unsigned long long component_size; /* same as array.size, except in
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* sectors and up to 64bits.
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*/
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unsigned long long custom_array_size; /* size for non-default sized
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* arrays (in sectors)
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*/
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#define NO_RESHAPE 0
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#define VOLUME_RESHAPE 1
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#define CONTAINER_RESHAPE 2
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#define RESHAPE_NO_BACKUP 16 /* Mask 'or'ed in */
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int reshape_active;
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unsigned long long reshape_progress;
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int recovery_blocked; /* for external metadata it
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* indicates that there is
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* reshape in progress in
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* container,
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* for native metadata it is
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* reshape_active field mirror
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*/
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int journal_device_required;
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int journal_clean;
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enum {
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CONSISTENCY_POLICY_UNKNOWN,
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CONSISTENCY_POLICY_NONE,
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CONSISTENCY_POLICY_RESYNC,
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CONSISTENCY_POLICY_BITMAP,
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CONSISTENCY_POLICY_JOURNAL,
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CONSISTENCY_POLICY_PPL,
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} consistency_policy;
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/* During reshape we can sometimes change the data_offset to avoid
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* over-writing still-valid data. We need to know if there is space.
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* So getinfo_super will fill in space_before and space_after in sectors.
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* data_offset can be increased or decreased by this amount.
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*/
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unsigned long long space_before, space_after;
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union {
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unsigned long long resync_start; /* per-array resync position */
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unsigned long long recovery_start; /* per-device rebuild position */
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#define MaxSector (~0ULL) /* resync/recovery complete position */
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};
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long bitmap_offset; /* 0 == none, 1 == a file */
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unsigned int ppl_size;
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int ppl_offset;
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unsigned long long ppl_sector;
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unsigned long safe_mode_delay; /* ms delay to mark clean */
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int new_level, delta_disks, new_layout, new_chunk;
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int errors;
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unsigned long cache_size; /* size of raid456 stripe cache*/
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int mismatch_cnt;
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char text_version[50];
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int container_member; /* for assembling external-metatdata arrays
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* This is to be used internally by metadata
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* handler only */
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int container_enough; /* flag external handlers can set to
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* indicate that subarrays have not enough (-1),
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* enough to start (0), or all expected disks (1) */
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char sys_name[32];
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struct mdinfo *devs;
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struct mdinfo *next;
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/* Device info for mdmon: */
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int recovery_fd;
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int state_fd;
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int bb_fd;
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int ubb_fd;
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#define DS_FAULTY 1
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#define DS_INSYNC 2
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#define DS_WRITE_MOSTLY 4
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#define DS_SPARE 8
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#define DS_BLOCKED 16
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#define DS_REMOVE 1024
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#define DS_UNBLOCK 2048
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int prev_state, curr_state, next_state;
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/* info read from sysfs */
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enum {
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ARRAY_CLEAR,
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ARRAY_INACTIVE,
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ARRAY_SUSPENDED,
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ARRAY_READONLY,
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ARRAY_READ_AUTO,
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ARRAY_CLEAN,
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ARRAY_ACTIVE,
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ARRAY_WRITE_PENDING,
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ARRAY_ACTIVE_IDLE,
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ARRAY_BROKEN,
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ARRAY_UNKNOWN_STATE,
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} array_state;
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struct md_bb bb;
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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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int symlinks;
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int names;
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int bblist;
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struct supertype *supertype;
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};
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struct spare_criteria {
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unsigned long long min_size;
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unsigned int sector_size;
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};
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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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INCREMENTAL,
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AUTODETECT,
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mode_count
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};
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extern char short_options[];
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extern char short_bitmap_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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*mode_help[],
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Help_create[], Help_build[], Help_assemble[], Help_grow[],
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Help_incr[],
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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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* numbers later than any 'short' character option.
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*/
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enum special_options {
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AssumeClean = 300,
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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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AutoHomeHost,
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Symlinks,
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AutoDetect,
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Waitclean,
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DetailPlatform,
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KillSubarray,
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UpdateSubarray,
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IncrementalPath,
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NoSharing,
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HelpOptions,
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Brief,
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NoDevices,
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ManageOpt,
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Add,
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AddSpare,
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AddJournal,
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Remove,
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Fail,
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Replace,
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With,
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MiscOpt,
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WaitOpt,
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ConfigFile,
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ChunkSize,
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WriteMostly,
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FailFast,
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NoFailFast,
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Layout,
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Auto,
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Force,
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SuperMinor,
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EMail,
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ProgramOpt,
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Increment,
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Fork,
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Bitmap,
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RebuildMapOpt,
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InvalidBackup,
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UdevRules,
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FreezeReshape,
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Continue,
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OffRootOpt,
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Prefer,
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KillOpt,
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DataOffset,
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ExamineBB,
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Dump,
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Restore,
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Action,
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Nodes,
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ClusterName,
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ClusterConfirm,
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WriteJournal,
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ConsistencyPolicy,
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};
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enum prefix_standard {
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JEDEC,
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IEC
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};
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enum bitmap_update {
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NoUpdate,
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NameUpdate,
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NodeNumUpdate,
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};
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enum flag_mode {
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FlagDefault, FlagSet, FlagClear,
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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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*
|
|
* 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_s(mapping_t *map, int num);
|
|
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);
|
|
}
|
|
|
|
/**
|
|
* is_fd_valid() - check file descriptor.
|
|
* @fd: file descriptor.
|
|
*
|
|
* The function checks if @fd is nonnegative integer and shall be used only
|
|
* to verify open() result.
|
|
*/
|
|
static inline int is_fd_valid(int fd)
|
|
{
|
|
return (fd > -1);
|
|
}
|
|
|
|
/**
|
|
* close_fd() - verify, close and unset file descriptor.
|
|
* @fd: pointer to file descriptor.
|
|
*
|
|
* The function closes and invalidates file descriptor if appropriative. It
|
|
* ignores incorrect file descriptor quitely to simplify error handling.
|
|
*/
|
|
static inline void close_fd(int *fd)
|
|
{
|
|
if (is_fd_valid(*fd) && close(*fd) == 0)
|
|
*fd = -1;
|
|
}
|
|
|
|
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,
|
|
int 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]);
|
|
int default_layout(struct supertype *st, int level, int verbose);
|
|
extern int is_near_layout_10(int layout);
|
|
extern int parse_layout_10(char *layout);
|
|
extern int parse_layout_faulty(char *layout);
|
|
extern int parse_num(int *dest, 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 bool is_dev_alive(char *path);
|
|
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 int conf_get_monitor_delay(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];
|
|
}
|
|
|
|
/**
|
|
* signal_s() - Wrapper for sigaction() with signal()-like interface.
|
|
* @sig: The signal to set the signal handler to.
|
|
* @handler: The signal handler.
|
|
*
|
|
* Return: previous handler or SIG_ERR on failure.
|
|
*/
|
|
static inline sighandler_t signal_s(int sig, sighandler_t handler)
|
|
{
|
|
struct sigaction new_act;
|
|
struct sigaction old_act;
|
|
|
|
new_act.sa_handler = handler;
|
|
new_act.sa_flags = 0;
|
|
|
|
if (sigaction(sig, &new_act, &old_act) == 0)
|
|
return old_act.sa_handler;
|
|
|
|
return SIG_ERR;
|
|
}
|
|
|
|
#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
|
|
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/**
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* This is true for native and DDF, IMSM allows 16.
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*/
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#define MD_NAME_MAX 32
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