In function write_init_super1(): If "rv = store_super1(st, di->fd)" return error and the di is the last. Then the di = NULL && rv > 0, so exec: if (rv) fprintf(stderr, Name ": Failed to write metadata to%s\n", di->devname); will be segmentation fault. Signed-off-by: majianpeng <majianpeng@gmail.com> Signed-off-by: NeilBrown <neilb@suse.de>
1825 lines
49 KiB
C
1825 lines
49 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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#include "mdadm.h"
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/*
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* The version-1 superblock :
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* All numeric fields are little-endian.
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*
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* total size: 256 bytes plus 2 per device.
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* 1K allows 384 devices.
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*/
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struct mdp_superblock_1 {
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/* constant array information - 128 bytes */
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__u32 magic; /* MD_SB_MAGIC: 0xa92b4efc - little endian */
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__u32 major_version; /* 1 */
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__u32 feature_map; /* 0 for now */
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__u32 pad0; /* always set to 0 when writing */
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__u8 set_uuid[16]; /* user-space generated. */
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char set_name[32]; /* set and interpreted by user-space */
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__u64 ctime; /* lo 40 bits are seconds, top 24 are microseconds or 0*/
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__u32 level; /* -4 (multipath), -1 (linear), 0,1,4,5 */
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__u32 layout; /* only for raid5 currently */
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__u64 size; /* used size of component devices, in 512byte sectors */
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__u32 chunksize; /* in 512byte sectors */
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__u32 raid_disks;
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__u32 bitmap_offset; /* sectors after start of superblock that bitmap starts
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* NOTE: signed, so bitmap can be before superblock
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* only meaningful of feature_map[0] is set.
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*/
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/* These are only valid with feature bit '4' */
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__u32 new_level; /* new level we are reshaping to */
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__u64 reshape_position; /* next address in array-space for reshape */
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__u32 delta_disks; /* change in number of raid_disks */
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__u32 new_layout; /* new layout */
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__u32 new_chunk; /* new chunk size (bytes) */
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__u8 pad1[128-124]; /* set to 0 when written */
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/* constant this-device information - 64 bytes */
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__u64 data_offset; /* sector start of data, often 0 */
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__u64 data_size; /* sectors in this device that can be used for data */
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__u64 super_offset; /* sector start of this superblock */
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__u64 recovery_offset;/* sectors before this offset (from data_offset) have been recovered */
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__u32 dev_number; /* permanent identifier of this device - not role in raid */
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__u32 cnt_corrected_read; /* number of read errors that were corrected by re-writing */
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__u8 device_uuid[16]; /* user-space setable, ignored by kernel */
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__u8 devflags; /* per-device flags. Only one defined...*/
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#define WriteMostly1 1 /* mask for writemostly flag in above */
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__u8 pad2[64-57]; /* set to 0 when writing */
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/* array state information - 64 bytes */
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__u64 utime; /* 40 bits second, 24 btes microseconds */
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__u64 events; /* incremented when superblock updated */
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__u64 resync_offset; /* data before this offset (from data_offset) known to be in sync */
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__u32 sb_csum; /* checksum upto dev_roles[max_dev] */
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__u32 max_dev; /* size of dev_roles[] array to consider */
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__u8 pad3[64-32]; /* set to 0 when writing */
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/* device state information. Indexed by dev_number.
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* 2 bytes per device
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* Note there are no per-device state flags. State information is rolled
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* into the 'roles' value. If a device is spare or faulty, then it doesn't
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* have a meaningful role.
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*/
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__u16 dev_roles[0]; /* role in array, or 0xffff for a spare, or 0xfffe for faulty */
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};
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#define MAX_SB_SIZE 4096
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/* bitmap super size is 256, but we round up to a sector for alignment */
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#define BM_SUPER_SIZE 512
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#define MAX_DEVS ((int)(MAX_SB_SIZE - sizeof(struct mdp_superblock_1)) / 2)
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#define SUPER1_SIZE (MAX_SB_SIZE + BM_SUPER_SIZE \
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+ sizeof(struct misc_dev_info))
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struct misc_dev_info {
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__u64 device_size;
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};
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/* feature_map bits */
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#define MD_FEATURE_BITMAP_OFFSET 1
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#define MD_FEATURE_RECOVERY_OFFSET 2 /* recovery_offset is present and
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* must be honoured
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*/
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#define MD_FEATURE_RESHAPE_ACTIVE 4
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#define MD_FEATURE_ALL (1|2|4)
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#ifndef offsetof
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#define offsetof(t,f) ((size_t)&(((t*)0)->f))
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#endif
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static unsigned int calc_sb_1_csum(struct mdp_superblock_1 * sb)
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{
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unsigned int disk_csum, csum;
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unsigned long long newcsum;
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int size = sizeof(*sb) + __le32_to_cpu(sb->max_dev)*2;
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unsigned int *isuper = (unsigned int*)sb;
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/* make sure I can count... */
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if (offsetof(struct mdp_superblock_1,data_offset) != 128 ||
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offsetof(struct mdp_superblock_1, utime) != 192 ||
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sizeof(struct mdp_superblock_1) != 256) {
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fprintf(stderr, "WARNING - superblock isn't sized correctly\n");
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}
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disk_csum = sb->sb_csum;
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sb->sb_csum = 0;
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newcsum = 0;
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for (; size>=4; size -= 4 ) {
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newcsum += __le32_to_cpu(*isuper);
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isuper++;
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}
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if (size == 2)
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newcsum += __le16_to_cpu(*(unsigned short*) isuper);
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csum = (newcsum & 0xffffffff) + (newcsum >> 32);
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sb->sb_csum = disk_csum;
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return __cpu_to_le32(csum);
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}
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/*
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* Information related to file descriptor used for aligned reads/writes.
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* Cache the block size.
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*/
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struct align_fd {
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int fd;
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int blk_sz;
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};
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static void init_afd(struct align_fd *afd, int fd)
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{
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afd->fd = fd;
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if (ioctl(afd->fd, BLKSSZGET, &afd->blk_sz) != 0)
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afd->blk_sz = 512;
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}
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static char abuf[4096+4096];
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static int aread(struct align_fd *afd, void *buf, int len)
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{
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/* aligned read.
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* On devices with a 4K sector size, we need to read
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* the full sector and copy relevant bits into
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* the buffer
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*/
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int bsize, iosize;
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char *b;
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int n;
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bsize = afd->blk_sz;
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if (!bsize || bsize > 4096 || len > 4096) {
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if (!bsize)
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fprintf(stderr, "WARNING - aread() called with "
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"invalid block size\n");
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return -1;
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}
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b = ROUND_UP_PTR((char *)abuf, 4096);
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for (iosize = 0; iosize < len; iosize += bsize)
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;
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n = read(afd->fd, b, iosize);
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if (n <= 0)
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return n;
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lseek(afd->fd, len - n, 1);
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if (n > len)
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n = len;
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memcpy(buf, b, n);
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return n;
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}
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static int awrite(struct align_fd *afd, void *buf, int len)
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{
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/* aligned write.
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* On devices with a 4K sector size, we need to write
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* the full sector. We pre-read if the sector is larger
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* than the write.
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* The address must be sector-aligned.
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*/
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int bsize, iosize;
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char *b;
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int n;
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bsize = afd->blk_sz;
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if (!bsize || bsize > 4096 || len > 4096) {
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if (!bsize)
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fprintf(stderr, "WARNING - awrite() called with "
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"invalid block size\n");
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return -1;
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}
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b = ROUND_UP_PTR((char *)abuf, 4096);
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for (iosize = 0; iosize < len ; iosize += bsize)
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;
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if (len != iosize) {
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n = read(afd->fd, b, iosize);
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if (n <= 0)
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return n;
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lseek(afd->fd, -n, 1);
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}
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memcpy(b, buf, len);
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n = write(afd->fd, b, iosize);
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if (n <= 0)
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return n;
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lseek(afd->fd, len - n, 1);
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return len;
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}
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#ifndef MDASSEMBLE
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static void examine_super1(struct supertype *st, char *homehost)
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{
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struct mdp_superblock_1 *sb = st->sb;
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time_t atime;
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unsigned int d;
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int role;
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int delta_extra = 0;
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int i;
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char *c;
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int l = homehost ? strlen(homehost) : 0;
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int layout;
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unsigned long long sb_offset;
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printf(" Magic : %08x\n", __le32_to_cpu(sb->magic));
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printf(" Version : 1");
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sb_offset = __le64_to_cpu(sb->super_offset);
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if (sb_offset <= 4)
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printf(".1\n");
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else if (sb_offset <= 8)
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printf(".2\n");
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else
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printf(".0\n");
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printf(" Feature Map : 0x%x\n", __le32_to_cpu(sb->feature_map));
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printf(" Array UUID : ");
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for (i=0; i<16; i++) {
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if ((i&3)==0 && i != 0) printf(":");
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printf("%02x", sb->set_uuid[i]);
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}
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printf("\n");
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printf(" Name : %.32s", sb->set_name);
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if (l > 0 && l < 32 &&
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sb->set_name[l] == ':' &&
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strncmp(sb->set_name, homehost, l) == 0)
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printf(" (local to host %s)", homehost);
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printf("\n");
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atime = __le64_to_cpu(sb->ctime) & 0xFFFFFFFFFFULL;
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printf(" Creation Time : %.24s\n", ctime(&atime));
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c=map_num(pers, __le32_to_cpu(sb->level));
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printf(" Raid Level : %s\n", c?c:"-unknown-");
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printf(" Raid Devices : %d\n", __le32_to_cpu(sb->raid_disks));
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printf("\n");
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printf(" Avail Dev Size : %llu%s\n",
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(unsigned long long)__le64_to_cpu(sb->data_size),
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human_size(__le64_to_cpu(sb->data_size)<<9));
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if (__le32_to_cpu(sb->level) > 0) {
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int ddsks = 0, ddsks_denom = 1;
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switch(__le32_to_cpu(sb->level)) {
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case 1: ddsks=1;break;
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case 4:
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case 5: ddsks = __le32_to_cpu(sb->raid_disks)-1; break;
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case 6: ddsks = __le32_to_cpu(sb->raid_disks)-2; break;
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case 10:
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layout = __le32_to_cpu(sb->layout);
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ddsks = __le32_to_cpu(sb->raid_disks);
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ddsks_denom = (layout&255) * ((layout>>8)&255);
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}
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if (ddsks) {
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long long asize = __le64_to_cpu(sb->size);
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asize = (asize << 9) * ddsks / ddsks_denom;
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printf(" Array Size : %llu%s\n",
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asize >> 10, human_size(asize));
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}
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if (sb->size != sb->data_size)
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printf(" Used Dev Size : %llu%s\n",
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(unsigned long long)__le64_to_cpu(sb->size),
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human_size(__le64_to_cpu(sb->size)<<9));
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}
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if (sb->data_offset)
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printf(" Data Offset : %llu sectors\n",
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(unsigned long long)__le64_to_cpu(sb->data_offset));
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printf(" Super Offset : %llu sectors\n",
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(unsigned long long)__le64_to_cpu(sb->super_offset));
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if (__le32_to_cpu(sb->feature_map) & MD_FEATURE_RECOVERY_OFFSET)
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printf("Recovery Offset : %llu sectors\n", (unsigned long long)__le64_to_cpu(sb->recovery_offset));
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printf(" State : %s\n", (__le64_to_cpu(sb->resync_offset)+1)? "active":"clean");
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printf(" Device UUID : ");
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for (i=0; i<16; i++) {
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if ((i&3)==0 && i != 0) printf(":");
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printf("%02x", sb->device_uuid[i]);
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}
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printf("\n");
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printf("\n");
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if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) {
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printf("Internal Bitmap : %ld sectors from superblock\n",
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(long)(int32_t)__le32_to_cpu(sb->bitmap_offset));
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}
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if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE)) {
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printf(" Reshape pos'n : %llu%s\n", (unsigned long long)__le64_to_cpu(sb->reshape_position)/2,
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human_size(__le64_to_cpu(sb->reshape_position)<<9));
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if (__le32_to_cpu(sb->delta_disks)) {
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printf(" Delta Devices : %d", __le32_to_cpu(sb->delta_disks));
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printf(" (%d->%d)\n",
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__le32_to_cpu(sb->raid_disks)-__le32_to_cpu(sb->delta_disks),
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__le32_to_cpu(sb->raid_disks));
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if ((int)__le32_to_cpu(sb->delta_disks) < 0)
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delta_extra = -__le32_to_cpu(sb->delta_disks);
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}
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if (__le32_to_cpu(sb->new_level) != __le32_to_cpu(sb->level)) {
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c = map_num(pers, __le32_to_cpu(sb->new_level));
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printf(" New Level : %s\n", c?c:"-unknown-");
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}
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if (__le32_to_cpu(sb->new_layout) != __le32_to_cpu(sb->layout)) {
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if (__le32_to_cpu(sb->level) == 5) {
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c = map_num(r5layout, __le32_to_cpu(sb->new_layout));
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printf(" New Layout : %s\n", c?c:"-unknown-");
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}
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if (__le32_to_cpu(sb->level) == 6) {
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c = map_num(r6layout, __le32_to_cpu(sb->new_layout));
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printf(" New Layout : %s\n", c?c:"-unknown-");
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}
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if (__le32_to_cpu(sb->level) == 10) {
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printf(" New Layout :");
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print_r10_layout(__le32_to_cpu(sb->new_layout));
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printf("\n");
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}
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}
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if (__le32_to_cpu(sb->new_chunk) != __le32_to_cpu(sb->chunksize))
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printf(" New Chunksize : %dK\n", __le32_to_cpu(sb->new_chunk)/2);
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printf("\n");
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}
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if (sb->devflags) {
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printf(" Flags :");
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if (sb->devflags & WriteMostly1)
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printf(" write-mostly");
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printf("\n");
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}
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atime = __le64_to_cpu(sb->utime) & 0xFFFFFFFFFFULL;
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printf(" Update Time : %.24s\n", ctime(&atime));
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if (calc_sb_1_csum(sb) == sb->sb_csum)
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printf(" Checksum : %x - correct\n", __le32_to_cpu(sb->sb_csum));
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else
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printf(" Checksum : %x - expected %x\n", __le32_to_cpu(sb->sb_csum),
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__le32_to_cpu(calc_sb_1_csum(sb)));
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printf(" Events : %llu\n", (unsigned long long)__le64_to_cpu(sb->events));
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printf("\n");
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if (__le32_to_cpu(sb->level) == 5) {
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c = map_num(r5layout, __le32_to_cpu(sb->layout));
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printf(" Layout : %s\n", c?c:"-unknown-");
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}
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if (__le32_to_cpu(sb->level) == 6) {
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c = map_num(r6layout, __le32_to_cpu(sb->layout));
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printf(" Layout : %s\n", c?c:"-unknown-");
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}
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if (__le32_to_cpu(sb->level) == 10) {
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int lo = __le32_to_cpu(sb->layout);
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printf(" Layout :");
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print_r10_layout(lo);
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printf("\n");
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}
|
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switch(__le32_to_cpu(sb->level)) {
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case 0:
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case 4:
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case 5:
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case 6:
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case 10:
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printf(" Chunk Size : %dK\n", __le32_to_cpu(sb->chunksize)/2);
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break;
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case -1:
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printf(" Rounding : %dK\n", __le32_to_cpu(sb->chunksize)/2);
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break;
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default: break;
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}
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printf("\n");
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#if 0
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/* This turns out to just be confusing */
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printf(" Array Slot : %d (", __le32_to_cpu(sb->dev_number));
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for (i= __le32_to_cpu(sb->max_dev); i> 0 ; i--)
|
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if (__le16_to_cpu(sb->dev_roles[i-1]) != 0xffff)
|
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break;
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for (d=0; d < i; d++) {
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int role = __le16_to_cpu(sb->dev_roles[d]);
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if (d) printf(", ");
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if (role == 0xffff) printf("empty");
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else if(role == 0xfffe) printf("failed");
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else printf("%d", role);
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}
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printf(")\n");
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#endif
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printf(" Device Role : ");
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d = __le32_to_cpu(sb->dev_number);
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if (d < __le32_to_cpu(sb->max_dev))
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role = __le16_to_cpu(sb->dev_roles[d]);
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else
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role = 0xFFFF;
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if (role >= 0xFFFE)
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printf("spare\n");
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else
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printf("Active device %d\n", role);
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|
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printf(" Array State : ");
|
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for (d=0; d<__le32_to_cpu(sb->raid_disks) + delta_extra; d++) {
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int cnt = 0;
|
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unsigned int i;
|
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for (i=0; i< __le32_to_cpu(sb->max_dev); i++) {
|
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unsigned int role = __le16_to_cpu(sb->dev_roles[i]);
|
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if (role == d)
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cnt++;
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}
|
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if (cnt > 1) printf("?");
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else if (cnt == 1) printf("A");
|
|
else printf (".");
|
|
}
|
|
#if 0
|
|
/* This is confusing too */
|
|
faulty = 0;
|
|
for (i=0; i< __le32_to_cpu(sb->max_dev); i++) {
|
|
int role = __le16_to_cpu(sb->dev_roles[i]);
|
|
if (role == 0xFFFE)
|
|
faulty++;
|
|
}
|
|
if (faulty) printf(" %d failed", faulty);
|
|
#endif
|
|
printf(" ('A' == active, '.' == missing)");
|
|
printf("\n");
|
|
}
|
|
|
|
|
|
static void brief_examine_super1(struct supertype *st, int verbose)
|
|
{
|
|
struct mdp_superblock_1 *sb = st->sb;
|
|
int i;
|
|
unsigned long long sb_offset;
|
|
char *nm;
|
|
char *c=map_num(pers, __le32_to_cpu(sb->level));
|
|
|
|
nm = strchr(sb->set_name, ':');
|
|
if (nm)
|
|
nm++;
|
|
else if (sb->set_name[0])
|
|
nm = sb->set_name;
|
|
else
|
|
nm = NULL;
|
|
|
|
printf("ARRAY%s%s", nm ? " /dev/md/":"", nm);
|
|
if (verbose && c)
|
|
printf(" level=%s", c);
|
|
sb_offset = __le64_to_cpu(sb->super_offset);
|
|
if (sb_offset <= 4)
|
|
printf(" metadata=1.1 ");
|
|
else if (sb_offset <= 8)
|
|
printf(" metadata=1.2 ");
|
|
else
|
|
printf(" metadata=1.0 ");
|
|
if (verbose)
|
|
printf("num-devices=%d ", __le32_to_cpu(sb->raid_disks));
|
|
printf("UUID=");
|
|
for (i=0; i<16; i++) {
|
|
if ((i&3)==0 && i != 0) printf(":");
|
|
printf("%02x", sb->set_uuid[i]);
|
|
}
|
|
if (sb->set_name[0])
|
|
printf(" name=%.32s", sb->set_name);
|
|
printf("\n");
|
|
}
|
|
|
|
static void export_examine_super1(struct supertype *st)
|
|
{
|
|
struct mdp_superblock_1 *sb = st->sb;
|
|
int i;
|
|
int len = 32;
|
|
|
|
printf("MD_LEVEL=%s\n", map_num(pers, __le32_to_cpu(sb->level)));
|
|
printf("MD_DEVICES=%d\n", __le32_to_cpu(sb->raid_disks));
|
|
for (i=0; i<32; i++)
|
|
if (sb->set_name[i] == '\n' ||
|
|
sb->set_name[i] == '\0') {
|
|
len = i;
|
|
break;
|
|
}
|
|
if (len)
|
|
printf("MD_NAME=%.*s\n", len, sb->set_name);
|
|
printf("MD_UUID=");
|
|
for (i=0; i<16; i++) {
|
|
if ((i&3)==0 && i != 0) printf(":");
|
|
printf("%02x", sb->set_uuid[i]);
|
|
}
|
|
printf("\n");
|
|
printf("MD_UPDATE_TIME=%llu\n",
|
|
__le64_to_cpu(sb->utime) & 0xFFFFFFFFFFULL);
|
|
printf("MD_DEV_UUID=");
|
|
for (i=0; i<16; i++) {
|
|
if ((i&3)==0 && i != 0) printf(":");
|
|
printf("%02x", sb->device_uuid[i]);
|
|
}
|
|
printf("\n");
|
|
printf("MD_EVENTS=%llu\n",
|
|
(unsigned long long)__le64_to_cpu(sb->events));
|
|
}
|
|
|
|
static void detail_super1(struct supertype *st, char *homehost)
|
|
{
|
|
struct mdp_superblock_1 *sb = st->sb;
|
|
int i;
|
|
int l = homehost ? strlen(homehost) : 0;
|
|
|
|
printf(" Name : %.32s", sb->set_name);
|
|
if (l > 0 && l < 32 &&
|
|
sb->set_name[l] == ':' &&
|
|
strncmp(sb->set_name, homehost, l) == 0)
|
|
printf(" (local to host %s)", homehost);
|
|
printf("\n UUID : ");
|
|
for (i=0; i<16; i++) {
|
|
if ((i&3)==0 && i != 0) printf(":");
|
|
printf("%02x", sb->set_uuid[i]);
|
|
}
|
|
printf("\n Events : %llu\n\n", (unsigned long long)__le64_to_cpu(sb->events));
|
|
}
|
|
|
|
static void brief_detail_super1(struct supertype *st)
|
|
{
|
|
struct mdp_superblock_1 *sb = st->sb;
|
|
int i;
|
|
|
|
if (sb->set_name[0])
|
|
printf(" name=%.32s", sb->set_name);
|
|
printf(" UUID=");
|
|
for (i=0; i<16; i++) {
|
|
if ((i&3)==0 && i != 0) printf(":");
|
|
printf("%02x", sb->set_uuid[i]);
|
|
}
|
|
}
|
|
|
|
static void export_detail_super1(struct supertype *st)
|
|
{
|
|
struct mdp_superblock_1 *sb = st->sb;
|
|
int i;
|
|
int len = 32;
|
|
|
|
for (i=0; i<32; i++)
|
|
if (sb->set_name[i] == '\n' ||
|
|
sb->set_name[i] == '\0') {
|
|
len = i;
|
|
break;
|
|
}
|
|
if (len)
|
|
printf("MD_NAME=%.*s\n", len, sb->set_name);
|
|
}
|
|
|
|
#endif
|
|
|
|
static int match_home1(struct supertype *st, char *homehost)
|
|
{
|
|
struct mdp_superblock_1 *sb = st->sb;
|
|
int l = homehost ? strlen(homehost) : 0;
|
|
|
|
return (l > 0 && l < 32 &&
|
|
sb->set_name[l] == ':' &&
|
|
strncmp(sb->set_name, homehost, l) == 0);
|
|
}
|
|
|
|
static void uuid_from_super1(struct supertype *st, int uuid[4])
|
|
{
|
|
struct mdp_superblock_1 *super = st->sb;
|
|
char *cuuid = (char*)uuid;
|
|
int i;
|
|
for (i=0; i<16; i++)
|
|
cuuid[i] = super->set_uuid[i];
|
|
}
|
|
|
|
static void getinfo_super1(struct supertype *st, struct mdinfo *info, char *map)
|
|
{
|
|
struct mdp_superblock_1 *sb = st->sb;
|
|
int working = 0;
|
|
unsigned int i;
|
|
unsigned int role;
|
|
unsigned int map_disks = info->array.raid_disks;
|
|
|
|
memset(info, 0, sizeof(*info));
|
|
info->array.major_version = 1;
|
|
info->array.minor_version = st->minor_version;
|
|
info->array.patch_version = 0;
|
|
info->array.raid_disks = __le32_to_cpu(sb->raid_disks);
|
|
info->array.level = __le32_to_cpu(sb->level);
|
|
info->array.layout = __le32_to_cpu(sb->layout);
|
|
info->array.md_minor = -1;
|
|
info->array.ctime = __le64_to_cpu(sb->ctime);
|
|
info->array.utime = __le64_to_cpu(sb->utime);
|
|
info->array.chunk_size = __le32_to_cpu(sb->chunksize)*512;
|
|
info->array.state =
|
|
(__le64_to_cpu(sb->resync_offset) == MaxSector)
|
|
? 1 : 0;
|
|
|
|
info->data_offset = __le64_to_cpu(sb->data_offset);
|
|
info->component_size = __le64_to_cpu(sb->size);
|
|
if (sb->feature_map & __le32_to_cpu(MD_FEATURE_BITMAP_OFFSET))
|
|
info->bitmap_offset = (int32_t)__le32_to_cpu(sb->bitmap_offset);
|
|
|
|
info->disk.major = 0;
|
|
info->disk.minor = 0;
|
|
info->disk.number = __le32_to_cpu(sb->dev_number);
|
|
if (__le32_to_cpu(sb->dev_number) >= __le32_to_cpu(sb->max_dev) ||
|
|
__le32_to_cpu(sb->dev_number) >= MAX_DEVS)
|
|
role = 0xfffe;
|
|
else
|
|
role = __le16_to_cpu(sb->dev_roles[__le32_to_cpu(sb->dev_number)]);
|
|
|
|
info->disk.raid_disk = -1;
|
|
switch(role) {
|
|
case 0xFFFF:
|
|
info->disk.state = 0; /* spare: not active, not sync, not faulty */
|
|
break;
|
|
case 0xFFFE:
|
|
info->disk.state = 1; /* faulty */
|
|
break;
|
|
default:
|
|
info->disk.state = 6; /* active and in sync */
|
|
info->disk.raid_disk = role;
|
|
}
|
|
if (sb->devflags & WriteMostly1)
|
|
info->disk.state |= (1 << MD_DISK_WRITEMOSTLY);
|
|
info->events = __le64_to_cpu(sb->events);
|
|
sprintf(info->text_version, "1.%d", st->minor_version);
|
|
info->safe_mode_delay = 200;
|
|
|
|
memcpy(info->uuid, sb->set_uuid, 16);
|
|
|
|
strncpy(info->name, sb->set_name, 32);
|
|
info->name[32] = 0;
|
|
|
|
if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RECOVERY_OFFSET))
|
|
info->recovery_start = __le32_to_cpu(sb->recovery_offset);
|
|
else
|
|
info->recovery_start = MaxSector;
|
|
|
|
if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE)) {
|
|
info->reshape_active = 1;
|
|
info->reshape_progress = __le64_to_cpu(sb->reshape_position);
|
|
info->new_level = __le32_to_cpu(sb->new_level);
|
|
info->delta_disks = __le32_to_cpu(sb->delta_disks);
|
|
info->new_layout = __le32_to_cpu(sb->new_layout);
|
|
info->new_chunk = __le32_to_cpu(sb->new_chunk)<<9;
|
|
if (info->delta_disks < 0)
|
|
info->array.raid_disks -= info->delta_disks;
|
|
} else
|
|
info->reshape_active = 0;
|
|
|
|
info->recovery_blocked = info->reshape_active;
|
|
|
|
if (map)
|
|
for (i=0; i<map_disks; i++)
|
|
map[i] = 0;
|
|
for (i = 0; i < __le32_to_cpu(sb->max_dev); i++) {
|
|
role = __le16_to_cpu(sb->dev_roles[i]);
|
|
if (/*role == 0xFFFF || */role < (unsigned) info->array.raid_disks) {
|
|
working++;
|
|
if (map && role < map_disks)
|
|
map[role] = 1;
|
|
}
|
|
}
|
|
|
|
info->array.working_disks = working;
|
|
}
|
|
|
|
static struct mdinfo *container_content1(struct supertype *st, char *subarray)
|
|
{
|
|
struct mdinfo *info;
|
|
|
|
if (subarray)
|
|
return NULL;
|
|
|
|
info = malloc(sizeof(*info));
|
|
getinfo_super1(st, info, NULL);
|
|
return info;
|
|
}
|
|
|
|
static int update_super1(struct supertype *st, struct mdinfo *info,
|
|
char *update,
|
|
char *devname, int verbose,
|
|
int uuid_set, char *homehost)
|
|
{
|
|
/* NOTE: for 'assemble' and 'force' we need to return non-zero
|
|
* if any change was made. For others, the return value is
|
|
* ignored.
|
|
*/
|
|
int rv = 0;
|
|
struct mdp_superblock_1 *sb = st->sb;
|
|
|
|
if (strcmp(update, "force-one")==0) {
|
|
/* Not enough devices for a working array,
|
|
* so bring this one up-to-date
|
|
*/
|
|
if (sb->events != __cpu_to_le64(info->events))
|
|
rv = 1;
|
|
sb->events = __cpu_to_le64(info->events);
|
|
} else if (strcmp(update, "force-array")==0) {
|
|
/* Degraded array and 'force' requests to
|
|
* maybe need to mark it 'clean'.
|
|
*/
|
|
switch(__le32_to_cpu(sb->level)) {
|
|
case 5: case 4: case 6:
|
|
/* need to force clean */
|
|
if (sb->resync_offset != MaxSector)
|
|
rv = 1;
|
|
sb->resync_offset = MaxSector;
|
|
}
|
|
} else if (strcmp(update, "assemble")==0) {
|
|
int d = info->disk.number;
|
|
int want;
|
|
if (info->disk.state == 6)
|
|
want = info->disk.raid_disk;
|
|
else
|
|
want = 0xFFFF;
|
|
if (sb->dev_roles[d] != __cpu_to_le16(want)) {
|
|
sb->dev_roles[d] = __cpu_to_le16(want);
|
|
rv = 1;
|
|
}
|
|
if (info->reshape_active &&
|
|
sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE) &&
|
|
info->delta_disks >= 0 &&
|
|
info->reshape_progress < __le64_to_cpu(sb->reshape_position)) {
|
|
sb->reshape_position = __cpu_to_le64(info->reshape_progress);
|
|
rv = 1;
|
|
}
|
|
if (info->reshape_active &&
|
|
sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE) &&
|
|
info->delta_disks < 0 &&
|
|
info->reshape_progress > __le64_to_cpu(sb->reshape_position)) {
|
|
sb->reshape_position = __cpu_to_le64(info->reshape_progress);
|
|
rv = 1;
|
|
}
|
|
} else if (strcmp(update, "linear-grow-new") == 0) {
|
|
unsigned int i;
|
|
int rfd, fd;
|
|
unsigned int max = __le32_to_cpu(sb->max_dev);
|
|
|
|
for (i=0 ; i < max ; i++)
|
|
if (__le16_to_cpu(sb->dev_roles[i]) >= 0xfffe)
|
|
break;
|
|
sb->dev_number = __cpu_to_le32(i);
|
|
info->disk.number = i;
|
|
if (max >= __le32_to_cpu(sb->max_dev))
|
|
sb->max_dev = __cpu_to_le32(max+1);
|
|
|
|
if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 ||
|
|
read(rfd, sb->device_uuid, 16) != 16) {
|
|
__u32 r[4] = {random(), random(), random(), random()};
|
|
memcpy(sb->device_uuid, r, 16);
|
|
}
|
|
if (rfd >= 0)
|
|
close(rfd);
|
|
|
|
sb->dev_roles[i] =
|
|
__cpu_to_le16(info->disk.raid_disk);
|
|
|
|
fd = open(devname, O_RDONLY);
|
|
if (fd >= 0) {
|
|
unsigned long long ds;
|
|
get_dev_size(fd, devname, &ds);
|
|
close(fd);
|
|
ds >>= 9;
|
|
if (__le64_to_cpu(sb->super_offset) <
|
|
__le64_to_cpu(sb->data_offset)) {
|
|
sb->data_size = __cpu_to_le64(
|
|
ds - __le64_to_cpu(sb->data_offset));
|
|
} else {
|
|
ds -= 8*2;
|
|
ds &= ~(unsigned long long)(4*2-1);
|
|
sb->super_offset = __cpu_to_le64(ds);
|
|
sb->data_size = __cpu_to_le64(
|
|
ds - __le64_to_cpu(sb->data_offset));
|
|
}
|
|
}
|
|
} else if (strcmp(update, "linear-grow-update") == 0) {
|
|
sb->raid_disks = __cpu_to_le32(info->array.raid_disks);
|
|
sb->dev_roles[info->disk.number] =
|
|
__cpu_to_le16(info->disk.raid_disk);
|
|
} else if (strcmp(update, "resync") == 0) {
|
|
/* make sure resync happens */
|
|
sb->resync_offset = 0ULL;
|
|
} else if (strcmp(update, "uuid") == 0) {
|
|
copy_uuid(sb->set_uuid, info->uuid, super1.swapuuid);
|
|
|
|
if (__le32_to_cpu(sb->feature_map)&MD_FEATURE_BITMAP_OFFSET) {
|
|
struct bitmap_super_s *bm;
|
|
bm = (struct bitmap_super_s*)(st->sb+MAX_SB_SIZE);
|
|
memcpy(bm->uuid, sb->set_uuid, 16);
|
|
}
|
|
} else if (strcmp(update, "no-bitmap") == 0) {
|
|
sb->feature_map &= ~__cpu_to_le32(MD_FEATURE_BITMAP_OFFSET);
|
|
} else if (strcmp(update, "homehost") == 0 &&
|
|
homehost) {
|
|
char *c;
|
|
update = "name";
|
|
c = strchr(sb->set_name, ':');
|
|
if (c)
|
|
strncpy(info->name, c+1, 31 - (c-sb->set_name));
|
|
else
|
|
strncpy(info->name, sb->set_name, 32);
|
|
info->name[32] = 0;
|
|
} else if (strcmp(update, "name") == 0) {
|
|
if (info->name[0] == 0)
|
|
sprintf(info->name, "%d", info->array.md_minor);
|
|
memset(sb->set_name, 0, sizeof(sb->set_name));
|
|
if (homehost &&
|
|
strchr(info->name, ':') == NULL &&
|
|
strlen(homehost)+1+strlen(info->name) < 32) {
|
|
strcpy(sb->set_name, homehost);
|
|
strcat(sb->set_name, ":");
|
|
strcat(sb->set_name, info->name);
|
|
} else
|
|
strcpy(sb->set_name, info->name);
|
|
} else if (strcmp(update, "devicesize") == 0 &&
|
|
__le64_to_cpu(sb->super_offset) <
|
|
__le64_to_cpu(sb->data_offset)) {
|
|
/* set data_size to device size less data_offset */
|
|
struct misc_dev_info *misc = (struct misc_dev_info*)
|
|
(st->sb + MAX_SB_SIZE + BM_SUPER_SIZE);
|
|
printf("Size was %llu\n", (unsigned long long)
|
|
__le64_to_cpu(sb->data_size));
|
|
sb->data_size = __cpu_to_le64(
|
|
misc->device_size - __le64_to_cpu(sb->data_offset));
|
|
printf("Size is %llu\n", (unsigned long long)
|
|
__le64_to_cpu(sb->data_size));
|
|
} else if (strcmp(update, "_reshape_progress")==0)
|
|
sb->reshape_position = __cpu_to_le64(info->reshape_progress);
|
|
else if (strcmp(update, "writemostly")==0)
|
|
sb->devflags |= WriteMostly1;
|
|
else if (strcmp(update, "readwrite")==0)
|
|
sb->devflags &= ~WriteMostly1;
|
|
else
|
|
rv = -1;
|
|
|
|
sb->sb_csum = calc_sb_1_csum(sb);
|
|
return rv;
|
|
}
|
|
|
|
static int init_super1(struct supertype *st, mdu_array_info_t *info,
|
|
unsigned long long size, char *name, char *homehost, int *uuid)
|
|
{
|
|
struct mdp_superblock_1 *sb;
|
|
int spares;
|
|
int rfd;
|
|
char defname[10];
|
|
int sbsize;
|
|
|
|
if (posix_memalign((void**)&sb, 4096, SUPER1_SIZE) != 0) {
|
|
fprintf(stderr, Name
|
|
": %s could not allocate superblock\n", __func__);
|
|
return 0;
|
|
}
|
|
memset(sb, 0, SUPER1_SIZE);
|
|
|
|
st->sb = sb;
|
|
if (info == NULL) {
|
|
/* zeroing superblock */
|
|
return 0;
|
|
}
|
|
|
|
spares = info->working_disks - info->active_disks;
|
|
if (info->raid_disks + spares > MAX_DEVS) {
|
|
fprintf(stderr, Name ": too many devices requested: %d+%d > %d\n",
|
|
info->raid_disks , spares, MAX_DEVS);
|
|
return 0;
|
|
}
|
|
|
|
sb->magic = __cpu_to_le32(MD_SB_MAGIC);
|
|
sb->major_version = __cpu_to_le32(1);
|
|
sb->feature_map = 0;
|
|
sb->pad0 = 0;
|
|
|
|
if (uuid)
|
|
copy_uuid(sb->set_uuid, uuid, super1.swapuuid);
|
|
else {
|
|
if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 ||
|
|
read(rfd, sb->set_uuid, 16) != 16) {
|
|
__u32 r[4] = {random(), random(), random(), random()};
|
|
memcpy(sb->set_uuid, r, 16);
|
|
}
|
|
if (rfd >= 0) close(rfd);
|
|
}
|
|
|
|
if (name == NULL || *name == 0) {
|
|
sprintf(defname, "%d", info->md_minor);
|
|
name = defname;
|
|
}
|
|
if (homehost &&
|
|
strchr(name, ':')== NULL &&
|
|
strlen(homehost)+1+strlen(name) < 32) {
|
|
strcpy(sb->set_name, homehost);
|
|
strcat(sb->set_name, ":");
|
|
strcat(sb->set_name, name);
|
|
} else
|
|
strcpy(sb->set_name, name);
|
|
|
|
sb->ctime = __cpu_to_le64((unsigned long long)time(0));
|
|
sb->level = __cpu_to_le32(info->level);
|
|
sb->layout = __cpu_to_le32(info->layout);
|
|
sb->size = __cpu_to_le64(size*2ULL);
|
|
sb->chunksize = __cpu_to_le32(info->chunk_size>>9);
|
|
sb->raid_disks = __cpu_to_le32(info->raid_disks);
|
|
|
|
sb->data_offset = __cpu_to_le64(0);
|
|
sb->data_size = __cpu_to_le64(0);
|
|
sb->super_offset = __cpu_to_le64(0);
|
|
sb->recovery_offset = __cpu_to_le64(0);
|
|
|
|
sb->utime = sb->ctime;
|
|
sb->events = __cpu_to_le64(1);
|
|
if (info->state & (1<<MD_SB_CLEAN))
|
|
sb->resync_offset = MaxSector;
|
|
else
|
|
sb->resync_offset = 0;
|
|
sbsize = sizeof(struct mdp_superblock_1) + 2 * (info->raid_disks + spares);
|
|
sbsize = ROUND_UP(sbsize, 512);
|
|
sb->max_dev = __cpu_to_le32((sbsize - sizeof(struct mdp_superblock_1)) / 2);
|
|
|
|
memset(sb->dev_roles, 0xff, MAX_SB_SIZE - sizeof(struct mdp_superblock_1));
|
|
|
|
return 1;
|
|
}
|
|
|
|
struct devinfo {
|
|
int fd;
|
|
char *devname;
|
|
mdu_disk_info_t disk;
|
|
struct devinfo *next;
|
|
};
|
|
#ifndef MDASSEMBLE
|
|
/* Add a device to the superblock being created */
|
|
static int add_to_super1(struct supertype *st, mdu_disk_info_t *dk,
|
|
int fd, char *devname)
|
|
{
|
|
struct mdp_superblock_1 *sb = st->sb;
|
|
__u16 *rp = sb->dev_roles + dk->number;
|
|
struct devinfo *di, **dip;
|
|
|
|
if ((dk->state & 6) == 6) /* active, sync */
|
|
*rp = __cpu_to_le16(dk->raid_disk);
|
|
else if ((dk->state & ~2) == 0) /* active or idle -> spare */
|
|
*rp = 0xffff;
|
|
else
|
|
*rp = 0xfffe;
|
|
|
|
if (dk->number >= (int)__le32_to_cpu(sb->max_dev) &&
|
|
__le32_to_cpu(sb->max_dev) < MAX_DEVS)
|
|
sb->max_dev = __cpu_to_le32(dk->number+1);
|
|
|
|
sb->dev_number = __cpu_to_le32(dk->number);
|
|
sb->devflags = 0; /* don't copy another disks flags */
|
|
sb->sb_csum = calc_sb_1_csum(sb);
|
|
|
|
dip = (struct devinfo **)&st->info;
|
|
while (*dip)
|
|
dip = &(*dip)->next;
|
|
di = malloc(sizeof(struct devinfo));
|
|
di->fd = fd;
|
|
di->devname = devname;
|
|
di->disk = *dk;
|
|
di->next = NULL;
|
|
*dip = di;
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static void locate_bitmap1(struct supertype *st, int fd);
|
|
|
|
static int store_super1(struct supertype *st, int fd)
|
|
{
|
|
struct mdp_superblock_1 *sb = st->sb;
|
|
unsigned long long sb_offset;
|
|
struct align_fd afd;
|
|
int sbsize;
|
|
unsigned long long dsize;
|
|
|
|
if (!get_dev_size(fd, NULL, &dsize))
|
|
return 1;
|
|
|
|
dsize >>= 9;
|
|
|
|
if (dsize < 24)
|
|
return 2;
|
|
|
|
init_afd(&afd, fd);
|
|
|
|
/*
|
|
* Calculate the position of the superblock.
|
|
* It is always aligned to a 4K boundary and
|
|
* depending on minor_version, it can be:
|
|
* 0: At least 8K, but less than 12K, from end of device
|
|
* 1: At start of device
|
|
* 2: 4K from start of device.
|
|
*/
|
|
switch(st->minor_version) {
|
|
case 0:
|
|
sb_offset = dsize;
|
|
sb_offset -= 8*2;
|
|
sb_offset &= ~(4*2-1);
|
|
break;
|
|
case 1:
|
|
sb_offset = 0;
|
|
break;
|
|
case 2:
|
|
sb_offset = 4*2;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
|
|
|
|
if (sb_offset != __le64_to_cpu(sb->super_offset) &&
|
|
0 != __le64_to_cpu(sb->super_offset)
|
|
) {
|
|
fprintf(stderr, Name ": internal error - sb_offset is wrong\n");
|
|
abort();
|
|
}
|
|
|
|
if (lseek64(fd, sb_offset << 9, 0)< 0LL)
|
|
return 3;
|
|
|
|
sbsize = ROUND_UP(sizeof(*sb) + 2 * __le32_to_cpu(sb->max_dev), 512);
|
|
|
|
if (awrite(&afd, sb, sbsize) != sbsize)
|
|
return 4;
|
|
|
|
if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) {
|
|
struct bitmap_super_s *bm = (struct bitmap_super_s*)
|
|
(((char*)sb)+MAX_SB_SIZE);
|
|
if (__le32_to_cpu(bm->magic) == BITMAP_MAGIC) {
|
|
locate_bitmap1(st, fd);
|
|
if (awrite(&afd, bm, sizeof(*bm)) != sizeof(*bm))
|
|
return 5;
|
|
}
|
|
}
|
|
fsync(fd);
|
|
return 0;
|
|
}
|
|
|
|
static int load_super1(struct supertype *st, int fd, char *devname);
|
|
|
|
static unsigned long choose_bm_space(unsigned long devsize)
|
|
{
|
|
/* if the device is bigger than 8Gig, save 64k for bitmap usage,
|
|
* if bigger than 200Gig, save 128k
|
|
* NOTE: result must be multiple of 4K else bad things happen
|
|
* on 4K-sector devices.
|
|
*/
|
|
if (devsize < 64*2) return 0;
|
|
if (devsize - 64*2 >= 200*1024*1024*2)
|
|
return 128*2;
|
|
if (devsize - 4*2 > 8*1024*1024*2)
|
|
return 64*2;
|
|
return 4*2;
|
|
}
|
|
|
|
static void free_super1(struct supertype *st);
|
|
|
|
#ifndef MDASSEMBLE
|
|
static int write_init_super1(struct supertype *st)
|
|
{
|
|
struct mdp_superblock_1 *sb = st->sb;
|
|
struct supertype *refst;
|
|
int rfd;
|
|
int rv = 0;
|
|
unsigned long long bm_space;
|
|
unsigned long long reserved;
|
|
struct devinfo *di;
|
|
unsigned long long dsize, array_size;
|
|
unsigned long long sb_offset, headroom;
|
|
|
|
for (di = st->info; di; di = di->next) {
|
|
if (di->disk.state == 1)
|
|
continue;
|
|
if (di->fd < 0)
|
|
continue;
|
|
|
|
while (Kill(di->devname, NULL, 0, 1, 1) == 0)
|
|
;
|
|
|
|
sb->dev_number = __cpu_to_le32(di->disk.number);
|
|
if (di->disk.state & (1<<MD_DISK_WRITEMOSTLY))
|
|
sb->devflags |= WriteMostly1;
|
|
else
|
|
sb->devflags &= ~WriteMostly1;
|
|
|
|
if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 ||
|
|
read(rfd, sb->device_uuid, 16) != 16) {
|
|
__u32 r[4] = {random(), random(), random(), random()};
|
|
memcpy(sb->device_uuid, r, 16);
|
|
}
|
|
if (rfd >= 0)
|
|
close(rfd);
|
|
|
|
sb->events = 0;
|
|
|
|
refst = dup_super(st);
|
|
if (load_super1(refst, di->fd, NULL)==0) {
|
|
struct mdp_superblock_1 *refsb = refst->sb;
|
|
|
|
memcpy(sb->device_uuid, refsb->device_uuid, 16);
|
|
if (memcmp(sb->set_uuid, refsb->set_uuid, 16)==0) {
|
|
/* same array, so preserve events and
|
|
* dev_number */
|
|
sb->events = refsb->events;
|
|
/* bugs in 2.6.17 and earlier mean the
|
|
* dev_number chosen in Manage must be preserved
|
|
*/
|
|
if (get_linux_version() >= 2006018)
|
|
sb->dev_number = refsb->dev_number;
|
|
}
|
|
free_super1(refst);
|
|
}
|
|
free(refst);
|
|
|
|
if (!get_dev_size(di->fd, NULL, &dsize)) {
|
|
rv = 1;
|
|
goto error_out;
|
|
}
|
|
dsize >>= 9;
|
|
|
|
if (dsize < 24) {
|
|
close(di->fd);
|
|
rv = 2;
|
|
goto error_out;
|
|
}
|
|
|
|
|
|
/*
|
|
* Calculate the position of the superblock.
|
|
* It is always aligned to a 4K boundary and
|
|
* depending on minor_version, it can be:
|
|
* 0: At least 8K, but less than 12K, from end of device
|
|
* 1: At start of device
|
|
* 2: 4K from start of device.
|
|
* Depending on the array size, we might leave extra space
|
|
* for a bitmap.
|
|
*/
|
|
array_size = __le64_to_cpu(sb->size);
|
|
/* work out how much space we left for a bitmap */
|
|
bm_space = choose_bm_space(array_size);
|
|
|
|
/* We try to leave 0.1% at the start for reshape
|
|
* operations, but limit this to 128Meg (0.1% of 10Gig)
|
|
* which is plenty for efficient reshapes
|
|
*/
|
|
headroom = 128 * 1024 * 2;
|
|
while (headroom << 10 > array_size)
|
|
headroom >>= 1;
|
|
|
|
switch(st->minor_version) {
|
|
case 0:
|
|
sb_offset = dsize;
|
|
sb_offset -= 8*2;
|
|
sb_offset &= ~(4*2-1);
|
|
sb->super_offset = __cpu_to_le64(sb_offset);
|
|
sb->data_offset = __cpu_to_le64(0);
|
|
if (sb_offset < array_size + bm_space)
|
|
bm_space = sb_offset - array_size;
|
|
sb->data_size = __cpu_to_le64(sb_offset - bm_space);
|
|
break;
|
|
case 1:
|
|
sb->super_offset = __cpu_to_le64(0);
|
|
reserved = bm_space + 4*2;
|
|
if (reserved < headroom)
|
|
reserved = headroom;
|
|
if (reserved + array_size > dsize)
|
|
reserved = dsize - array_size;
|
|
/* Try for multiple of 1Meg so it is nicely aligned */
|
|
#define ONE_MEG (2*1024)
|
|
if (reserved > ONE_MEG)
|
|
reserved = (reserved/ONE_MEG) * ONE_MEG;
|
|
|
|
/* force 4K alignment */
|
|
reserved &= ~7ULL;
|
|
|
|
sb->data_offset = __cpu_to_le64(reserved);
|
|
sb->data_size = __cpu_to_le64(dsize - reserved);
|
|
break;
|
|
case 2:
|
|
sb_offset = 4*2;
|
|
sb->super_offset = __cpu_to_le64(4*2);
|
|
if (4*2 + 4*2 + bm_space + array_size
|
|
> dsize)
|
|
bm_space = dsize - array_size
|
|
- 4*2 - 4*2;
|
|
|
|
reserved = bm_space + 4*2 + 4*2;
|
|
if (reserved < headroom)
|
|
reserved = headroom;
|
|
if (reserved + array_size > dsize)
|
|
reserved = dsize - array_size;
|
|
/* Try for multiple of 1Meg so it is nicely aligned */
|
|
#define ONE_MEG (2*1024)
|
|
if (reserved > ONE_MEG)
|
|
reserved = (reserved/ONE_MEG) * ONE_MEG;
|
|
|
|
/* force 4K alignment */
|
|
reserved &= ~7ULL;
|
|
|
|
sb->data_offset = __cpu_to_le64(reserved);
|
|
sb->data_size = __cpu_to_le64(dsize - reserved);
|
|
break;
|
|
default:
|
|
fprintf(stderr, Name ": Failed to write invalid "
|
|
"metadata format 1.%i to %s\n",
|
|
st->minor_version, di->devname);
|
|
rv = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
sb->sb_csum = calc_sb_1_csum(sb);
|
|
rv = store_super1(st, di->fd);
|
|
if (rv == 0 && (__le32_to_cpu(sb->feature_map) & 1))
|
|
rv = st->ss->write_bitmap(st, di->fd);
|
|
close(di->fd);
|
|
di->fd = -1;
|
|
if (rv)
|
|
goto error_out;
|
|
}
|
|
error_out:
|
|
if (rv)
|
|
fprintf(stderr, Name ": Failed to write metadata to %s\n",
|
|
di->devname);
|
|
out:
|
|
return rv;
|
|
}
|
|
#endif
|
|
|
|
static int compare_super1(struct supertype *st, struct supertype *tst)
|
|
{
|
|
/*
|
|
* return:
|
|
* 0 same, or first was empty, and second was copied
|
|
* 1 second had wrong number
|
|
* 2 wrong uuid
|
|
* 3 wrong other info
|
|
*/
|
|
struct mdp_superblock_1 *first = st->sb;
|
|
struct mdp_superblock_1 *second = tst->sb;
|
|
|
|
if (second->magic != __cpu_to_le32(MD_SB_MAGIC))
|
|
return 1;
|
|
if (second->major_version != __cpu_to_le32(1))
|
|
return 1;
|
|
|
|
if (!first) {
|
|
if (posix_memalign((void**)&first, 4096, SUPER1_SIZE) != 0) {
|
|
fprintf(stderr, Name
|
|
": %s could not allocate superblock\n", __func__);
|
|
return 1;
|
|
}
|
|
memcpy(first, second, SUPER1_SIZE);
|
|
st->sb = first;
|
|
return 0;
|
|
}
|
|
if (memcmp(first->set_uuid, second->set_uuid, 16)!= 0)
|
|
return 2;
|
|
|
|
if (first->ctime != second->ctime ||
|
|
first->level != second->level ||
|
|
first->layout != second->layout ||
|
|
first->size != second->size ||
|
|
first->chunksize != second->chunksize ||
|
|
first->raid_disks != second->raid_disks)
|
|
return 3;
|
|
return 0;
|
|
}
|
|
|
|
static int load_super1(struct supertype *st, int fd, char *devname)
|
|
{
|
|
unsigned long long dsize;
|
|
unsigned long long sb_offset;
|
|
struct mdp_superblock_1 *super;
|
|
int uuid[4];
|
|
struct bitmap_super_s *bsb;
|
|
struct misc_dev_info *misc;
|
|
struct align_fd afd;
|
|
|
|
free_super1(st);
|
|
|
|
init_afd(&afd, fd);
|
|
|
|
if (st->ss == NULL || st->minor_version == -1) {
|
|
int bestvers = -1;
|
|
struct supertype tst;
|
|
__u64 bestctime = 0;
|
|
/* guess... choose latest ctime */
|
|
memset(&tst, 0, sizeof(tst));
|
|
tst.ss = &super1;
|
|
for (tst.minor_version = 0; tst.minor_version <= 2 ; tst.minor_version++) {
|
|
switch(load_super1(&tst, fd, devname)) {
|
|
case 0: super = tst.sb;
|
|
if (bestvers == -1 ||
|
|
bestctime < __le64_to_cpu(super->ctime)) {
|
|
bestvers = tst.minor_version;
|
|
bestctime = __le64_to_cpu(super->ctime);
|
|
}
|
|
free(super);
|
|
tst.sb = NULL;
|
|
break;
|
|
case 1: return 1; /*bad device */
|
|
case 2: break; /* bad, try next */
|
|
}
|
|
}
|
|
if (bestvers != -1) {
|
|
int rv;
|
|
tst.minor_version = bestvers;
|
|
tst.ss = &super1;
|
|
tst.max_devs = MAX_DEVS;
|
|
rv = load_super1(&tst, fd, devname);
|
|
if (rv == 0)
|
|
*st = tst;
|
|
return rv;
|
|
}
|
|
return 2;
|
|
}
|
|
if (!get_dev_size(fd, devname, &dsize))
|
|
return 1;
|
|
dsize >>= 9;
|
|
|
|
if (dsize < 24) {
|
|
if (devname)
|
|
fprintf(stderr, Name ": %s is too small for md: size is %llu sectors.\n",
|
|
devname, dsize);
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Calculate the position of the superblock.
|
|
* It is always aligned to a 4K boundary and
|
|
* depending on minor_version, it can be:
|
|
* 0: At least 8K, but less than 12K, from end of device
|
|
* 1: At start of device
|
|
* 2: 4K from start of device.
|
|
*/
|
|
switch(st->minor_version) {
|
|
case 0:
|
|
sb_offset = dsize;
|
|
sb_offset -= 8*2;
|
|
sb_offset &= ~(4*2-1);
|
|
break;
|
|
case 1:
|
|
sb_offset = 0;
|
|
break;
|
|
case 2:
|
|
sb_offset = 4*2;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
ioctl(fd, BLKFLSBUF, 0); /* make sure we read current data */
|
|
|
|
|
|
if (lseek64(fd, sb_offset << 9, 0)< 0LL) {
|
|
if (devname)
|
|
fprintf(stderr, Name ": Cannot seek to superblock on %s: %s\n",
|
|
devname, strerror(errno));
|
|
return 1;
|
|
}
|
|
|
|
if (posix_memalign((void**)&super, 4096, SUPER1_SIZE) != 0) {
|
|
fprintf(stderr, Name ": %s could not allocate superblock\n",
|
|
__func__);
|
|
return 1;
|
|
}
|
|
|
|
if (aread(&afd, super, MAX_SB_SIZE) != MAX_SB_SIZE) {
|
|
if (devname)
|
|
fprintf(stderr, Name ": Cannot read superblock on %s\n",
|
|
devname);
|
|
free(super);
|
|
return 1;
|
|
}
|
|
|
|
if (__le32_to_cpu(super->magic) != MD_SB_MAGIC) {
|
|
if (devname)
|
|
fprintf(stderr, Name ": No super block found on %s (Expected magic %08x, got %08x)\n",
|
|
devname, MD_SB_MAGIC, __le32_to_cpu(super->magic));
|
|
free(super);
|
|
return 2;
|
|
}
|
|
|
|
if (__le32_to_cpu(super->major_version) != 1) {
|
|
if (devname)
|
|
fprintf(stderr, Name ": Cannot interpret superblock on %s - version is %d\n",
|
|
devname, __le32_to_cpu(super->major_version));
|
|
free(super);
|
|
return 2;
|
|
}
|
|
if (__le64_to_cpu(super->super_offset) != sb_offset) {
|
|
if (devname)
|
|
fprintf(stderr, Name ": No superblock found on %s (super_offset is wrong)\n",
|
|
devname);
|
|
free(super);
|
|
return 2;
|
|
}
|
|
st->sb = super;
|
|
|
|
bsb = (struct bitmap_super_s *)(((char*)super)+MAX_SB_SIZE);
|
|
|
|
misc = (struct misc_dev_info*) (((char*)super)+MAX_SB_SIZE+BM_SUPER_SIZE);
|
|
misc->device_size = dsize;
|
|
|
|
/* Now check on the bitmap superblock */
|
|
if ((__le32_to_cpu(super->feature_map)&MD_FEATURE_BITMAP_OFFSET) == 0)
|
|
return 0;
|
|
/* Read the bitmap superblock and make sure it looks
|
|
* valid. If it doesn't clear the bit. An --assemble --force
|
|
* should get that written out.
|
|
*/
|
|
locate_bitmap1(st, fd);
|
|
if (aread(&afd, bsb, 512) != 512)
|
|
goto no_bitmap;
|
|
|
|
uuid_from_super1(st, uuid);
|
|
if (__le32_to_cpu(bsb->magic) != BITMAP_MAGIC ||
|
|
memcmp(bsb->uuid, uuid, 16) != 0)
|
|
goto no_bitmap;
|
|
return 0;
|
|
|
|
no_bitmap:
|
|
super->feature_map = __cpu_to_le32(__le32_to_cpu(super->feature_map)
|
|
& ~MD_FEATURE_BITMAP_OFFSET);
|
|
return 0;
|
|
}
|
|
|
|
|
|
static struct supertype *match_metadata_desc1(char *arg)
|
|
{
|
|
struct supertype *st = calloc(1, sizeof(*st));
|
|
if (!st)
|
|
return st;
|
|
|
|
st->container_dev = NoMdDev;
|
|
st->ss = &super1;
|
|
st->max_devs = MAX_DEVS;
|
|
st->sb = NULL;
|
|
/* leading zeros can be safely ignored. --detail generates them. */
|
|
while (*arg == '0')
|
|
arg++;
|
|
if (strcmp(arg, "1.0") == 0 ||
|
|
strcmp(arg, "1.00") == 0) {
|
|
st->minor_version = 0;
|
|
return st;
|
|
}
|
|
if (strcmp(arg, "1.1") == 0 ||
|
|
strcmp(arg, "1.01") == 0
|
|
) {
|
|
st->minor_version = 1;
|
|
return st;
|
|
}
|
|
if (strcmp(arg, "1.2") == 0 ||
|
|
#ifndef DEFAULT_OLD_METADATA /* ifdef in super0.c */
|
|
strcmp(arg, "default") == 0 ||
|
|
#endif /* DEFAULT_OLD_METADATA */
|
|
strcmp(arg, "1.02") == 0) {
|
|
st->minor_version = 2;
|
|
return st;
|
|
}
|
|
if (strcmp(arg, "1") == 0 ||
|
|
strcmp(arg, "default") == 0) {
|
|
st->minor_version = -1;
|
|
return st;
|
|
}
|
|
|
|
free(st);
|
|
return NULL;
|
|
}
|
|
|
|
/* find available size on device with this devsize, using
|
|
* superblock type st, and reserving 'reserve' sectors for
|
|
* a possible bitmap
|
|
*/
|
|
static __u64 avail_size1(struct supertype *st, __u64 devsize)
|
|
{
|
|
struct mdp_superblock_1 *super = st->sb;
|
|
if (devsize < 24)
|
|
return 0;
|
|
|
|
if (super == NULL)
|
|
/* creating: allow suitable space for bitmap */
|
|
devsize -= choose_bm_space(devsize);
|
|
#ifndef MDASSEMBLE
|
|
else if (__le32_to_cpu(super->feature_map)&MD_FEATURE_BITMAP_OFFSET) {
|
|
/* hot-add. allow for actual size of bitmap */
|
|
struct bitmap_super_s *bsb;
|
|
bsb = (struct bitmap_super_s *)(((char*)super)+MAX_SB_SIZE);
|
|
devsize -= bitmap_sectors(bsb);
|
|
}
|
|
#endif
|
|
|
|
if (st->minor_version < 0)
|
|
/* not specified, so time to set default */
|
|
st->minor_version = 2;
|
|
if (super == NULL && st->minor_version > 0) {
|
|
/* haven't committed to a size yet, so allow some
|
|
* slack for space for reshape.
|
|
* Limit slack to 128M, but aim for about 0.1%
|
|
*/
|
|
unsigned long long headroom = 128*1024*2;
|
|
while ((headroom << 10) > devsize)
|
|
headroom >>= 1;
|
|
devsize -= headroom;
|
|
}
|
|
switch(st->minor_version) {
|
|
case 0:
|
|
/* at end */
|
|
return ((devsize - 8*2 ) & ~(4*2-1));
|
|
case 1:
|
|
/* at start, 4K for superblock and possible bitmap */
|
|
return devsize - 4*2;
|
|
case 2:
|
|
/* 4k from start, 4K for superblock and possible bitmap */
|
|
return devsize - (4+4)*2;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
add_internal_bitmap1(struct supertype *st,
|
|
int *chunkp, int delay, int write_behind,
|
|
unsigned long long size,
|
|
int may_change, int major)
|
|
{
|
|
/*
|
|
* If not may_change, then this is a 'Grow' without sysfs support for
|
|
* bitmaps, and the bitmap must fit after the superblock at 1K offset.
|
|
* If may_change, then this is create or a Grow with sysfs syupport,
|
|
* and we can put the bitmap wherever we like.
|
|
*
|
|
* size is in sectors, chunk is in bytes !!!
|
|
*/
|
|
|
|
unsigned long long bits;
|
|
unsigned long long max_bits;
|
|
unsigned long long min_chunk;
|
|
long offset;
|
|
unsigned long long chunk = *chunkp;
|
|
int room = 0;
|
|
int creating = 0;
|
|
struct mdp_superblock_1 *sb = st->sb;
|
|
bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb) + MAX_SB_SIZE);
|
|
int uuid[4];
|
|
|
|
if (__le64_to_cpu(sb->data_size) == 0)
|
|
/* Must be creating the array, else data_size would be non-zero */
|
|
creating = 1;
|
|
switch(st->minor_version) {
|
|
case 0:
|
|
/* either 3K after the superblock (when hot-add),
|
|
* or some amount of space before.
|
|
*/
|
|
if (creating) {
|
|
/* We are creating array, so we *know* how much room has
|
|
* been left.
|
|
*/
|
|
offset = 0;
|
|
room = choose_bm_space(__le64_to_cpu(sb->size));
|
|
} else {
|
|
room = __le64_to_cpu(sb->super_offset)
|
|
- __le64_to_cpu(sb->data_offset)
|
|
- __le64_to_cpu(sb->data_size);
|
|
|
|
if (!may_change || (room < 3*2 &&
|
|
__le32_to_cpu(sb->max_dev) <= 384)) {
|
|
room = 3*2;
|
|
offset = 1*2;
|
|
} else {
|
|
offset = 0; /* means movable offset */
|
|
}
|
|
}
|
|
break;
|
|
case 1:
|
|
case 2: /* between superblock and data */
|
|
if (creating) {
|
|
offset = 4*2;
|
|
room = choose_bm_space(__le64_to_cpu(sb->size));
|
|
} else {
|
|
room = __le64_to_cpu(sb->data_offset)
|
|
- __le64_to_cpu(sb->super_offset);
|
|
if (!may_change) {
|
|
room -= 2; /* Leave 1K for superblock */
|
|
offset = 2;
|
|
} else {
|
|
room -= 4*2; /* leave 4K for superblock */
|
|
offset = 4*2;
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
|
|
if (chunk == UnSet && room > 128*2)
|
|
/* Limit to 128K of bitmap when chunk size not requested */
|
|
room = 128*2;
|
|
|
|
max_bits = (room * 512 - sizeof(bitmap_super_t)) * 8;
|
|
|
|
min_chunk = 4096; /* sub-page chunks don't work yet.. */
|
|
bits = (size*512)/min_chunk +1;
|
|
while (bits > max_bits) {
|
|
min_chunk *= 2;
|
|
bits = (bits+1)/2;
|
|
}
|
|
if (chunk == UnSet) {
|
|
/* For practical purpose, 64Meg is a good
|
|
* default chunk size for internal bitmaps.
|
|
*/
|
|
chunk = min_chunk;
|
|
if (chunk < 64*1024*1024)
|
|
chunk = 64*1024*1024;
|
|
} else if (chunk < min_chunk)
|
|
return 0; /* chunk size too small */
|
|
if (chunk == 0) /* rounding problem */
|
|
return 0;
|
|
|
|
if (offset == 0) {
|
|
/* start bitmap on a 4K boundary with enough space for
|
|
* the bitmap
|
|
*/
|
|
bits = (size*512) / chunk + 1;
|
|
room = ((bits+7)/8 + sizeof(bitmap_super_t) +4095)/4096;
|
|
room *= 8; /* convert 4K blocks to sectors */
|
|
offset = -room;
|
|
}
|
|
|
|
sb->bitmap_offset = (int32_t)__cpu_to_le32(offset);
|
|
|
|
sb->feature_map = __cpu_to_le32(__le32_to_cpu(sb->feature_map)
|
|
| MD_FEATURE_BITMAP_OFFSET);
|
|
memset(bms, 0, sizeof(*bms));
|
|
bms->magic = __cpu_to_le32(BITMAP_MAGIC);
|
|
bms->version = __cpu_to_le32(major);
|
|
uuid_from_super1(st, uuid);
|
|
memcpy(bms->uuid, uuid, 16);
|
|
bms->chunksize = __cpu_to_le32(chunk);
|
|
bms->daemon_sleep = __cpu_to_le32(delay);
|
|
bms->sync_size = __cpu_to_le64(size);
|
|
bms->write_behind = __cpu_to_le32(write_behind);
|
|
|
|
*chunkp = chunk;
|
|
return 1;
|
|
}
|
|
|
|
static void locate_bitmap1(struct supertype *st, int fd)
|
|
{
|
|
unsigned long long offset;
|
|
struct mdp_superblock_1 *sb;
|
|
int mustfree = 0;
|
|
|
|
if (!st->sb) {
|
|
if (st->ss->load_super(st, fd, NULL))
|
|
return; /* no error I hope... */
|
|
mustfree = 1;
|
|
}
|
|
sb = st->sb;
|
|
|
|
offset = __le64_to_cpu(sb->super_offset);
|
|
offset += (int32_t) __le32_to_cpu(sb->bitmap_offset);
|
|
if (mustfree)
|
|
free(sb);
|
|
lseek64(fd, offset<<9, 0);
|
|
}
|
|
|
|
static int write_bitmap1(struct supertype *st, int fd)
|
|
{
|
|
struct mdp_superblock_1 *sb = st->sb;
|
|
bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb)+MAX_SB_SIZE);
|
|
int rv = 0;
|
|
void *buf;
|
|
int towrite, n;
|
|
struct align_fd afd;
|
|
|
|
init_afd(&afd, fd);
|
|
|
|
locate_bitmap1(st, fd);
|
|
|
|
if (posix_memalign(&buf, 4096, 4096))
|
|
return -ENOMEM;
|
|
|
|
memset(buf, 0xff, 4096);
|
|
memcpy(buf, (char *)bms, sizeof(bitmap_super_t));
|
|
|
|
towrite = __le64_to_cpu(bms->sync_size) / (__le32_to_cpu(bms->chunksize)>>9);
|
|
towrite = (towrite+7) >> 3; /* bits to bytes */
|
|
towrite += sizeof(bitmap_super_t);
|
|
towrite = ROUND_UP(towrite, 512);
|
|
while (towrite > 0) {
|
|
n = towrite;
|
|
if (n > 4096)
|
|
n = 4096;
|
|
n = awrite(&afd, buf, n);
|
|
if (n > 0)
|
|
towrite -= n;
|
|
else
|
|
break;
|
|
memset(buf, 0xff, 4096);
|
|
}
|
|
fsync(fd);
|
|
if (towrite)
|
|
rv = -2;
|
|
|
|
free(buf);
|
|
return rv;
|
|
}
|
|
|
|
static void free_super1(struct supertype *st)
|
|
{
|
|
if (st->sb)
|
|
free(st->sb);
|
|
while (st->info) {
|
|
struct devinfo *di = st->info;
|
|
st->info = di->next;
|
|
if (di->fd >= 0)
|
|
close(di->fd);
|
|
free(di);
|
|
}
|
|
st->sb = NULL;
|
|
}
|
|
|
|
#ifndef MDASSEMBLE
|
|
static int validate_geometry1(struct supertype *st, int level,
|
|
int layout, int raiddisks,
|
|
int *chunk, unsigned long long size,
|
|
char *subdev, unsigned long long *freesize,
|
|
int verbose)
|
|
{
|
|
unsigned long long ldsize;
|
|
int fd;
|
|
|
|
if (level == LEVEL_CONTAINER) {
|
|
if (verbose)
|
|
fprintf(stderr, Name ": 1.x metadata does not support containers\n");
|
|
return 0;
|
|
}
|
|
if (chunk && *chunk == UnSet)
|
|
*chunk = DEFAULT_CHUNK;
|
|
|
|
if (!subdev)
|
|
return 1;
|
|
|
|
fd = open(subdev, O_RDONLY|O_EXCL, 0);
|
|
if (fd < 0) {
|
|
if (verbose)
|
|
fprintf(stderr, Name ": super1.x cannot open %s: %s\n",
|
|
subdev, strerror(errno));
|
|
return 0;
|
|
}
|
|
|
|
if (!get_dev_size(fd, subdev, &ldsize)) {
|
|
close(fd);
|
|
return 0;
|
|
}
|
|
close(fd);
|
|
|
|
*freesize = avail_size1(st, ldsize >> 9);
|
|
return 1;
|
|
}
|
|
#endif /* MDASSEMBLE */
|
|
|
|
struct superswitch super1 = {
|
|
#ifndef MDASSEMBLE
|
|
.examine_super = examine_super1,
|
|
.brief_examine_super = brief_examine_super1,
|
|
.export_examine_super = export_examine_super1,
|
|
.detail_super = detail_super1,
|
|
.brief_detail_super = brief_detail_super1,
|
|
.export_detail_super = export_detail_super1,
|
|
.write_init_super = write_init_super1,
|
|
.validate_geometry = validate_geometry1,
|
|
.add_to_super = add_to_super1,
|
|
#endif
|
|
.match_home = match_home1,
|
|
.uuid_from_super = uuid_from_super1,
|
|
.getinfo_super = getinfo_super1,
|
|
.container_content = container_content1,
|
|
.update_super = update_super1,
|
|
.init_super = init_super1,
|
|
.store_super = store_super1,
|
|
.compare_super = compare_super1,
|
|
.load_super = load_super1,
|
|
.match_metadata_desc = match_metadata_desc1,
|
|
.avail_size = avail_size1,
|
|
.add_internal_bitmap = add_internal_bitmap1,
|
|
.locate_bitmap = locate_bitmap1,
|
|
.write_bitmap = write_bitmap1,
|
|
.free_super = free_super1,
|
|
#if __BYTE_ORDER == BIG_ENDIAN
|
|
.swapuuid = 0,
|
|
#else
|
|
.swapuuid = 1,
|
|
#endif
|
|
.name = "1.x",
|
|
};
|