* Email: <neilb@suse.de>
*/
+#include <stddef.h>
#include "mdadm.h"
/*
* The version-1 superblock :
__u64 reshape_position; /* next address in array-space for reshape */
__u32 delta_disks; /* change in number of raid_disks */
__u32 new_layout; /* new layout */
- __u32 new_chunk; /* new chunk size (bytes) */
- __u8 pad1[128-124]; /* set to 0 when written */
+ __u32 new_chunk; /* new chunk size (sectors) */
+ __u32 new_offset; /* signed number to add to data_offset in new
+ * layout. 0 == no-change. This can be
+ * different on each device in the array.
+ */
/* constant this-device information - 64 bytes */
__u64 data_offset; /* sector start of data, often 0 */
__u32 dev_number; /* permanent identifier of this device - not role in raid */
__u32 cnt_corrected_read; /* number of read errors that were corrected by re-writing */
__u8 device_uuid[16]; /* user-space setable, ignored by kernel */
- __u8 devflags; /* per-device flags. Only one defined...*/
+ __u8 devflags; /* per-device flags. Only one defined...*/
#define WriteMostly1 1 /* mask for writemostly flag in above */
/* bad block log. If there are any bad blocks the feature flag is set.
* if offset and size are non-zero, that space is reserved and available.
*/
#define MD_FEATURE_RESHAPE_ACTIVE 4
#define MD_FEATURE_BAD_BLOCKS 8 /* badblock list is not empty */
+#define MD_FEATURE_REPLACEMENT 16 /* This device is replacing an
+ * active device with same 'role'.
+ * 'recovery_offset' is also set.
+ */
+#define MD_FEATURE_RESHAPE_BACKWARDS 32 /* Reshape doesn't change number
+ * of devices, but is going
+ * backwards anyway.
+ */
+#define MD_FEATURE_NEW_OFFSET 64 /* new_offset must be honoured */
+#define MD_FEATURE_ALL (MD_FEATURE_BITMAP_OFFSET \
+ |MD_FEATURE_RECOVERY_OFFSET \
+ |MD_FEATURE_RESHAPE_ACTIVE \
+ |MD_FEATURE_BAD_BLOCKS \
+ |MD_FEATURE_REPLACEMENT \
+ |MD_FEATURE_RESHAPE_BACKWARDS \
+ |MD_FEATURE_NEW_OFFSET \
+ )
-#define MD_FEATURE_ALL (1|2|4|8)
-
-#ifndef offsetof
-#define offsetof(t,f) ((size_t)&(((t*)0)->f))
-#endif
static unsigned int calc_sb_1_csum(struct mdp_superblock_1 * sb)
{
unsigned int disk_csum, csum;
int l = homehost ? strlen(homehost) : 0;
int layout;
unsigned long long sb_offset;
+ struct mdinfo info;
printf(" Magic : %08x\n", __le32_to_cpu(sb->magic));
printf(" Version : 1");
if (sb->data_offset)
printf(" Data Offset : %llu sectors\n",
(unsigned long long)__le64_to_cpu(sb->data_offset));
+ if (sb->new_offset &&
+ (__le32_to_cpu(sb->feature_map) & MD_FEATURE_NEW_OFFSET)) {
+ unsigned long long offset = __le64_to_cpu(sb->data_offset);
+ offset += (signed)(int32_t)__le32_to_cpu(sb->new_offset);
+ printf(" New Offset : %llu sectors\n", offset);
+ }
printf(" Super Offset : %llu sectors\n",
(unsigned long long)__le64_to_cpu(sb->super_offset));
if (__le32_to_cpu(sb->feature_map) & MD_FEATURE_RECOVERY_OFFSET)
printf("Recovery Offset : %llu sectors\n", (unsigned long long)__le64_to_cpu(sb->recovery_offset));
+
+ st->ss->getinfo_super(st, &info, NULL);
+ if (info.space_after != 1 &&
+ !(__le32_to_cpu(sb->feature_map) & MD_FEATURE_NEW_OFFSET))
+ printf(" Unused Space : before=%llu sectors, after=%llu sectors\n",
+ info.space_before, info.space_after);
+
printf(" State : %s\n", (__le64_to_cpu(sb->resync_offset)+1)? "active":"clean");
printf(" Device UUID : ");
for (i=0; i<16; i++) {
if (sb->bblog_size && sb->bblog_offset) {
printf(" Bad Block Log : %d entries available at offset %ld sectors",
__le16_to_cpu(sb->bblog_size)*512/8,
- (long)__le32_to_cpu(sb->bblog_offset));
+ (long)(int32_t)__le32_to_cpu(sb->bblog_offset));
if (sb->feature_map &
__cpu_to_le32(MD_FEATURE_BAD_BLOCKS))
printf(" - bad blocks present.");
printf("\n");
}
-
if (calc_sb_1_csum(sb) == sb->sb_csum)
printf(" Checksum : %x - correct\n", __le32_to_cpu(sb->sb_csum));
else
role = 0xFFFF;
if (role >= 0xFFFE)
printf("spare\n");
+ else if (sb->feature_map & __cpu_to_le32(MD_FEATURE_REPLACEMENT))
+ printf("Replacement device %d\n", role);
else
printf("Active device %d\n", role);
if (role == d)
cnt++;
}
- if (cnt > 1) printf("?");
- else if (cnt == 1) printf("A");
- else printf (".");
+ if (cnt == 2)
+ printf("R");
+ else if (cnt == 1)
+ printf("A");
+ else if (cnt == 0)
+ printf(".");
+ else
+ printf("?");
}
#if 0
/* This is confusing too */
}
if (faulty) printf(" %d failed", faulty);
#endif
- printf(" ('A' == active, '.' == missing)");
+ printf(" ('A' == active, '.' == missing, 'R' == replacing)");
printf("\n");
}
-
static void brief_examine_super1(struct supertype *st, int verbose)
{
struct mdp_superblock_1 *sb = st->sb;
(unsigned long long)__le64_to_cpu(sb->events));
}
+static int copy_metadata1(struct supertype *st, int from, int to)
+{
+ /* Read superblock. If it looks good, write it out.
+ * Then if a bitmap is present, copy that.
+ * And if a bad-block-list is present, copy that too.
+ */
+ void *buf;
+ unsigned long long dsize, sb_offset;
+ const int bufsize = 4*1024;
+ struct mdp_superblock_1 super, *sb;
+
+ if (posix_memalign(&buf, 4096, bufsize) != 0)
+ return 1;
+
+ if (!get_dev_size(from, NULL, &dsize))
+ goto err;
+
+ dsize >>= 9;
+ if (dsize < 24)
+ goto err;
+ 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:
+ goto err;
+ }
+
+ if (lseek64(from, sb_offset << 9, 0) < 0LL)
+ goto err;
+ if (read(from, buf, bufsize) != bufsize)
+ goto err;
+
+ sb = buf;
+ super = *sb; // save most of sb for when we reuse buf
+
+ if (__le32_to_cpu(super.magic) != MD_SB_MAGIC ||
+ __le32_to_cpu(super.major_version) != 1 ||
+ __le64_to_cpu(super.super_offset) != sb_offset ||
+ calc_sb_1_csum(sb) != super.sb_csum)
+ goto err;
+
+ if (lseek64(to, sb_offset << 9, 0) < 0LL)
+ goto err;
+ if (write(to, buf, bufsize) != bufsize)
+ goto err;
+
+ if (super.feature_map & __le32_to_cpu(MD_FEATURE_BITMAP_OFFSET)) {
+ unsigned long long bitmap_offset = sb_offset;
+ int bytes = 4096; // just an estimate.
+ int written = 0;
+ struct align_fd afrom, ato;
+
+ init_afd(&afrom, from);
+ init_afd(&ato, to);
+
+ bitmap_offset += (int32_t)__le32_to_cpu(super.bitmap_offset);
+
+ if (lseek64(from, bitmap_offset<<9, 0) < 0)
+ goto err;
+ if (lseek64(to, bitmap_offset<<9, 0) < 0)
+ goto err;
+
+ for (written = 0; written < bytes ; ) {
+ int n = bytes - written;
+ if (n > 4096)
+ n = 4096;
+ if (aread(&afrom, buf, n) != n)
+ goto err;
+ if (written == 0) {
+ /* have the header, can calculate
+ * correct bitmap bytes */
+ bitmap_super_t *bms;
+ int bits;
+ bms = (void*)buf;
+ bits = __le64_to_cpu(bms->sync_size) / (__le32_to_cpu(bms->chunksize)>>9);
+ bytes = (bits+7) >> 3;
+ bytes += sizeof(bitmap_super_t);
+ bytes = ROUND_UP(bytes, 512);
+ if (n > bytes)
+ n = bytes;
+ }
+ if (awrite(&ato, buf, n) != n)
+ goto err;
+ written += n;
+ }
+ }
+
+ if (super.bblog_size != 0 &&
+ __le32_to_cpu(super.bblog_size) <= 100 &&
+ super.bblog_offset != 0 &&
+ (super.feature_map & __le32_to_cpu(MD_FEATURE_BAD_BLOCKS))) {
+ /* There is a bad block log */
+ unsigned long long bb_offset = sb_offset;
+ int bytes = __le32_to_cpu(super.bblog_size) * 512;
+ int written = 0;
+ struct align_fd afrom, ato;
+
+ init_afd(&afrom, from);
+ init_afd(&ato, to);
+
+ bb_offset += (int32_t)__le32_to_cpu(super.bblog_offset);
+
+ if (lseek64(from, bb_offset<<9, 0) < 0)
+ goto err;
+ if (lseek64(to, bb_offset<<9, 0) < 0)
+ goto err;
+
+ for (written = 0; written < bytes ; ) {
+ int n = bytes - written;
+ if (n > 4096)
+ n = 4096;
+ if (aread(&afrom, buf, n) != n)
+ goto err;
+
+ if (awrite(&ato, buf, n) != n)
+ goto err;
+ written += n;
+ }
+ }
+
+ free(buf);
+ return 0;
+
+err:
+ free(buf);
+ return 1;
+}
+
static void detail_super1(struct supertype *st, char *homehost)
{
struct mdp_superblock_1 *sb = st->sb;
printf("MD_NAME=%.*s\n", len, sb->set_name);
}
+static int examine_badblocks_super1(struct supertype *st, int fd, char *devname)
+{
+ struct mdp_superblock_1 *sb = st->sb;
+ unsigned long long offset;
+ int size;
+ __u64 *bbl, *bbp;
+ int i;
+
+ if (!sb->bblog_size || __le32_to_cpu(sb->bblog_size) > 100
+ || !sb->bblog_offset){
+ printf("No bad-blocks list configured on %s\n", devname);
+ return 0;
+ }
+ if ((sb->feature_map & __cpu_to_le32(MD_FEATURE_BAD_BLOCKS))
+ == 0) {
+ printf("Bad-blocks list is empty in %s\n", devname);
+ return 0;
+ }
+
+ size = __le32_to_cpu(sb->bblog_size)* 512;
+ if (posix_memalign((void**)&bbl, 4096, size) != 0) {
+ pr_err("could not allocate badblocks list\n");
+ return 0;
+ }
+ offset = __le64_to_cpu(sb->super_offset) +
+ (int)__le32_to_cpu(sb->bblog_offset);
+ offset <<= 9;
+ if (lseek64(fd, offset, 0) < 0) {
+ pr_err("Cannot seek to bad-blocks list\n");
+ return 1;
+ }
+ if (read(fd, bbl, size) != size) {
+ pr_err("Cannot read bad-blocks list\n");
+ return 1;
+ }
+ /* 64bits per entry. 10 bits is block-count, 54 bits is block
+ * offset. Blocks are sectors unless bblog->shift makes them bigger
+ */
+ bbp = (__u64*)bbl;
+ printf("Bad-blocks on %s:\n", devname);
+ for (i = 0; i < size/8; i++, bbp++) {
+ __u64 bb = __le64_to_cpu(*bbp);
+ int count = bb & 0x3ff;
+ unsigned long long sector = bb >> 10;
+
+ if (bb + 1 == 0)
+ break;
+
+ sector <<= sb->bblog_shift;
+ count <<= sb->bblog_shift;
+
+ printf("%20llu for %d sectors\n", sector, count);
+ }
+ return 0;
+}
+
#endif
static int match_home1(struct supertype *st, char *homehost)
static void getinfo_super1(struct supertype *st, struct mdinfo *info, char *map)
{
struct mdp_superblock_1 *sb = st->sb;
+ struct bitmap_super_s *bsb = (void*)(((char*)sb)+MAX_SB_SIZE);
+ struct misc_dev_info *misc = (void*)(((char*)sb)+MAX_SB_SIZE+BM_SUPER_SIZE);
int working = 0;
unsigned int i;
unsigned int role;
unsigned int map_disks = info->array.raid_disks;
+ unsigned long long super_offset;
+ unsigned long long data_size;
memset(info, 0, sizeof(*info));
info->array.major_version = 1;
else
role = __le16_to_cpu(sb->dev_roles[__le32_to_cpu(sb->dev_number)]);
+ super_offset = __le64_to_cpu(sb->super_offset);
+ if (info->array.level <= 0)
+ data_size = __le64_to_cpu(sb->data_size);
+ else
+ data_size = __le64_to_cpu(sb->size);
+ if (info->data_offset < super_offset) {
+ unsigned long long end;
+ info->space_before = info->data_offset;
+ end = super_offset;
+
+ if (sb->bblog_offset && sb->bblog_size) {
+ unsigned long long bboffset = super_offset;
+ bboffset += (int32_t)__le32_to_cpu(sb->bblog_offset);
+ if (bboffset < end)
+ end = bboffset;
+ }
+
+ if (super_offset + info->bitmap_offset < end)
+ end = super_offset + info->bitmap_offset;
+
+ if (info->data_offset + data_size < end)
+ info->space_after = end - data_size - info->data_offset;
+ else
+ info->space_after = 0;
+ } else {
+ unsigned long long earliest;
+ earliest = super_offset + (32+4)*2; /* match kernel */
+ if (info->bitmap_offset > 0) {
+ unsigned long long bmend = info->bitmap_offset;
+ unsigned long long size = __le64_to_cpu(bsb->sync_size);
+ size /= __le32_to_cpu(bsb->chunksize) >> 9;
+ size = (size + 7) >> 3;
+ size += sizeof(bitmap_super_t);
+ size = ROUND_UP(size, 4096);
+ size /= 512;
+ bmend += size;
+ if (bmend > earliest)
+ bmend = earliest;
+ }
+ if (sb->bblog_offset && sb->bblog_size) {
+ unsigned long long bbend = super_offset;
+ bbend += (int32_t)__le32_to_cpu(sb->bblog_offset);
+ bbend += __le32_to_cpu(sb->bblog_size);
+ if (bbend > earliest)
+ earliest = bbend;
+ }
+ if (earliest < info->data_offset)
+ info->space_before = info->data_offset - earliest;
+ else
+ info->space_before = 0;
+ info->space_after = misc->device_size - data_size - info->data_offset;
+ }
+ if (info->space_before == 0 && info->space_after == 0) {
+ /* It will look like we don't support data_offset changes,
+ * be we do - it's just that there is no room.
+ * A change that reduced the number of devices should
+ * still be allowed, so set the otherwise useless value of '1'
+ */
+ info->space_after = 1;
+ }
+
info->disk.raid_disk = -1;
switch(role) {
case 0xFFFF:
strncpy(info->name, sb->set_name, 32);
info->name[32] = 0;
+ if ((__le32_to_cpu(sb->feature_map)&MD_FEATURE_REPLACEMENT)) {
+ info->disk.state &= ~(1 << MD_DISK_SYNC);
+ info->disk.state |= 1 << MD_DISK_REPLACEMENT;
+ }
+
if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RECOVERY_OFFSET))
info->recovery_start = __le32_to_cpu(sb->recovery_offset);
else
if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE)) {
info->reshape_active = 1;
+ if ((sb->feature_map & __le32_to_cpu(MD_FEATURE_NEW_OFFSET)) &&
+ sb->new_offset != 0)
+ info->reshape_active |= RESHAPE_NO_BACKUP;
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);
int rv = 0;
struct mdp_superblock_1 *sb = st->sb;
+ if (strcmp(update, "homehost") == 0 &&
+ homehost) {
+ /* Note that 'homehost' is special as it is really
+ * a "name" update.
+ */
+ 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;
+ }
+
if (strcmp(update, "force-one")==0) {
/* Not enough devices for a working array,
* so bring this one up-to-date
} else if (strcmp(update, "assemble")==0) {
int d = info->disk.number;
int want;
- if (info->disk.state == 6)
+ if (info->disk.state & (1<<MD_DISK_ACTIVE))
want = info->disk.raid_disk;
else
want = 0xFFFF;
*/
unsigned long long sb_offset = __le64_to_cpu(sb->super_offset);
unsigned long long data_offset = __le64_to_cpu(sb->data_offset);
- long bitmap_offset = (long)__le64_to_cpu(sb->bitmap_offset);
+ long bitmap_offset = (long)(int32_t)__le32_to_cpu(sb->bitmap_offset);
long bm_sectors = 0;
long space;
+#ifndef MDASSEMBLE
if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) {
struct bitmap_super_s *bsb;
bsb = (struct bitmap_super_s *)(((char*)sb)+MAX_SB_SIZE);
bm_sectors = bitmap_sectors(bsb);
}
-
+#endif
if (sb_offset < data_offset) {
- /* 1.1 or 1.2. Put bbl just before data
+ /* 1.1 or 1.2. Put bbl after bitmap leaving at least 32K
*/
long bb_offset;
- space = data_offset - sb_offset;
- bb_offset = space - 8;
+ bb_offset = sb_offset + 8;
if (bm_sectors && bitmap_offset > 0)
- space -= (bitmap_offset + bm_sectors);
- else
- space -= 8; /* The superblock */
- if (space >= 8) {
+ bb_offset = bitmap_offset + bm_sectors;
+ while (bb_offset < (long)sb_offset + 8 + 32*2
+ && bb_offset + 8+8 <= (long)data_offset)
+ /* too close to bitmap, and room to grow */
+ bb_offset += 8;
+ if (bb_offset + 8 <= (long)data_offset) {
sb->bblog_size = __cpu_to_le16(8);
sb->bblog_offset = __cpu_to_le32(bb_offset);
}
sb->bblog_shift = 0;
sb->bblog_offset = 0;
}
- } 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);
/* 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, "revert-reshape") == 0) {
+ rv = -2;
+ if (!(sb->feature_map & __cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE)))
+ pr_err("No active reshape to revert on %s\n",
+ devname);
+ else {
+ __u32 temp;
+ unsigned long long reshape_sectors;
+ long reshape_chunk;
+ rv = 0;
+ /* reshape_position is a little messy.
+ * Its value must be a multiple of the larger
+ * chunk size, and of the "after" data disks.
+ * So when reverting we need to change it to
+ * be a multiple of the new "after" data disks,
+ * which is the old "before".
+ * If it isn't already a multiple of 'before',
+ * the only thing we could do would be
+ * copy some block around on the disks, which
+ * is easy to get wrong.
+ * So we reject a revert-reshape unless the
+ * alignment is good.
+ */
+ if (__le32_to_cpu(sb->level) >= 4 &&
+ __le32_to_cpu(sb->level) <= 6) {
+ reshape_sectors = __le64_to_cpu(sb->reshape_position);
+ reshape_chunk = __le32_to_cpu(sb->new_chunk);
+ reshape_chunk *= __le32_to_cpu(sb->raid_disks) - __le32_to_cpu(sb->delta_disks) -
+ (__le32_to_cpu(sb->level)==6 ? 2 : 1);
+ if (reshape_sectors % reshape_chunk) {
+ pr_err("Reshape position is not suitably aligned.\n");
+ pr_err("Try normal assembly and stop again\n");
+ return -2;
+ }
+ }
+ sb->raid_disks = __cpu_to_le32(__le32_to_cpu(sb->raid_disks) -
+ __le32_to_cpu(sb->delta_disks));
+ if (sb->delta_disks == 0)
+ sb->feature_map ^= __cpu_to_le32(MD_FEATURE_RESHAPE_BACKWARDS);
+ else
+ sb->delta_disks = __cpu_to_le32(-__le32_to_cpu(sb->delta_disks));
+
+ temp = sb->new_layout;
+ sb->new_layout = sb->layout;
+ sb->layout = temp;
+
+ temp = sb->new_chunk;
+ sb->new_chunk = sb->chunksize;
+ sb->chunksize = temp;
+
+ if (sb->feature_map & __cpu_to_le32(MD_FEATURE_NEW_OFFSET)) {
+ long offset_delta = (int32_t)__le32_to_cpu(sb->new_offset);
+ sb->data_offset = __cpu_to_le64(__le64_to_cpu(sb->data_offset) + offset_delta);
+ sb->new_offset = __cpu_to_le32(-offset_delta);
+ sb->data_size = __cpu_to_le64(__le64_to_cpu(sb->data_size) - offset_delta);
+ }
+ }
} else if (strcmp(update, "_reshape_progress")==0)
sb->reshape_position = __cpu_to_le64(info->reshape_progress);
else if (strcmp(update, "writemostly")==0)
}
static int init_super1(struct supertype *st, mdu_array_info_t *info,
- unsigned long long size, char *name, char *homehost, int *uuid)
+ unsigned long long size, char *name, char *homehost,
+ int *uuid, unsigned long long data_offset)
{
struct mdp_superblock_1 *sb;
int spares;
int sbsize;
if (posix_memalign((void**)&sb, 4096, SUPER1_SIZE) != 0) {
- pr_err("%s could not allocate superblock\n", __func__);
+ pr_err("could not allocate superblock\n");
return 0;
}
memset(sb, 0, SUPER1_SIZE);
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_offset = __cpu_to_le64(data_offset);
sb->data_size = __cpu_to_le64(0);
sb->super_offset = __cpu_to_le64(0);
sb->recovery_offset = __cpu_to_le64(0);
struct devinfo {
int fd;
char *devname;
+ long long data_offset;
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)
+ int fd, char *devname, unsigned long long data_offset)
{
struct mdp_superblock_1 *sb = st->sb;
__u16 *rp = sb->dev_roles + dk->number;
di->fd = fd;
di->devname = devname;
di->disk = *dk;
+ di->data_offset = data_offset;
di->next = NULL;
*dip = di;
return -EINVAL;
}
-
-
if (sb_offset != __le64_to_cpu(sb->super_offset) &&
0 != __le64_to_cpu(sb->super_offset)
) {
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;
+ unsigned long long sb_offset;
+ unsigned long long data_offset;
for (di = st->info; di; di = di->next) {
- if (di->disk.state == 1)
+ if (di->disk.state & (1 << MD_DISK_FAULTY))
continue;
if (di->fd < 0)
continue;
sb->events = 0;
refst = dup_super(st);
- if (load_super1(refst, di->fd, NULL)==0) {
+ if (load_super1(refst, di->fd, NULL)==0) {
struct mdp_superblock_1 *refsb = refst->sb;
memcpy(sb->device_uuid, refsb->device_uuid, 16);
goto error_out;
}
-
/*
* Calculate the position of the superblock.
* It is always aligned to a 4K boundary and
* 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.
- * Also leave 4K for bad-block log.
+ * data_offset has already been set.
*/
array_size = __le64_to_cpu(sb->size);
/* work out how much space we left for a bitmap,
* Add 8 sectors for bad block log */
bm_space = choose_bm_space(array_size) + 8;
- /* 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;
-
+ data_offset = di->data_offset;
+ if (data_offset == INVALID_SECTORS)
+ data_offset = st->data_offset;
switch(st->minor_version) {
case 0:
+ if (data_offset == INVALID_SECTORS)
+ data_offset = 0;
sb_offset = dsize;
sb_offset -= 8*2;
sb_offset &= ~(4*2-1);
+ sb->data_offset = __cpu_to_le64(data_offset);
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;
+ if (data_offset == INVALID_SECTORS)
+ data_offset = 16;
- sb->data_offset = __cpu_to_le64(reserved);
- sb->data_size = __cpu_to_le64(dsize - reserved);
- if (reserved >= 16) {
+ sb->data_offset = __cpu_to_le64(data_offset);
+ sb->data_size = __cpu_to_le64(dsize - data_offset);
+ if (data_offset >= 8 + 32*2 + 8) {
sb->bblog_size = __cpu_to_le16(8);
- sb->bblog_offset = __cpu_to_le32(reserved-8);
+ sb->bblog_offset = __cpu_to_le32(8 + 32*2);
+ } else if (data_offset >= 16) {
+ sb->bblog_size = __cpu_to_le16(8);
+ sb->bblog_offset = __cpu_to_le32(data_offset-8);
}
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->super_offset = __cpu_to_le64(sb_offset);
+ if (data_offset == INVALID_SECTORS)
+ data_offset = 24;
- sb->data_offset = __cpu_to_le64(reserved);
- sb->data_size = __cpu_to_le64(dsize - reserved);
- if (reserved >= 16+16) {
+ sb->data_offset = __cpu_to_le64(data_offset);
+ sb->data_size = __cpu_to_le64(dsize - data_offset);
+ if (data_offset >= 16 + 32*2 + 8) {
+ sb->bblog_size = __cpu_to_le16(8);
+ sb->bblog_offset = __cpu_to_le32(8 + 32*2);
+ } else if (data_offset >= 16+16) {
sb->bblog_size = __cpu_to_le16(8);
/* '8' sectors for the bblog, and another '8'
* because we want offset from superblock, not
* start of device.
*/
- sb->bblog_offset = __cpu_to_le32(reserved-8-8);
+ sb->bblog_offset = __cpu_to_le32(data_offset-8-8);
}
break;
default:
rv = -EINVAL;
goto out;
}
+ if (conf_get_create_info()->bblist == 0) {
+ sb->bblog_size = 0;
+ sb->bblog_offset = 0;
+ }
sb->sb_csum = calc_sb_1_csum(sb);
rv = store_super1(st, di->fd);
if (!first) {
if (posix_memalign((void**)&first, 4096, SUPER1_SIZE) != 0) {
- pr_err("%s could not allocate superblock\n", __func__);
+ pr_err("could not allocate superblock\n");
return 1;
}
memcpy(first, second, SUPER1_SIZE);
return -EINVAL;
}
- ioctl(fd, BLKFLSBUF, 0); /* make sure we read current data */
-
-
if (lseek64(fd, sb_offset << 9, 0)< 0LL) {
if (devname)
pr_err("Cannot seek to superblock on %s: %s\n",
}
if (posix_memalign((void**)&super, 4096, SUPER1_SIZE) != 0) {
- pr_err("%s could not allocate superblock\n",
- __func__);
+ pr_err("could not allocate superblock\n");
return 1;
}
misc = (struct misc_dev_info*) (((char*)super)+MAX_SB_SIZE+BM_SUPER_SIZE);
misc->device_size = dsize;
+ if (st->data_offset == INVALID_SECTORS)
+ st->data_offset = __le64_to_cpu(super->data_offset);
/* Now check on the bitmap superblock */
if ((__le32_to_cpu(super->feature_map)&MD_FEATURE_BITMAP_OFFSET) == 0)
return 0;
}
-
static struct supertype *match_metadata_desc1(char *arg)
{
struct supertype *st = xcalloc(1, sizeof(*st));
- st->container_dev = NoMdDev;
+ st->container_devnm[0] = 0;
st->ss = &super1;
st->max_devs = MAX_DEVS;
st->sb = NULL;
+ st->data_offset = INVALID_SECTORS;
/* leading zeros can be safely ignored. --detail generates them. */
while (*arg == '0')
arg++;
{
struct mdp_superblock_1 *super = st->sb;
int bmspace = 0;
+ int bbspace = 0;
if (devsize < 24)
return 0;
- if (super == NULL)
- /* creating: allow suitable space for bitmap */
- bmspace = choose_bm_space(devsize);
#ifndef MDASSEMBLE
- else if (__le32_to_cpu(super->feature_map)&MD_FEATURE_BITMAP_OFFSET) {
+ 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);
}
#endif
/* Allow space for bad block log */
- if (super && super->bblog_size)
- devsize -= __le16_to_cpu(super->bblog_size);
- else
- devsize -= 8;
-
+ if (super->bblog_size)
+ bbspace = __le16_to_cpu(super->bblog_size);
if (st->minor_version < 0)
/* not specified, so time to set default */
st->minor_version = 2;
+ if (data_offset == INVALID_SECTORS)
+ data_offset = st->data_offset;
+
if (data_offset != INVALID_SECTORS)
switch(st->minor_version) {
case 0:
- return devsize - data_offset - 8*2;
+ return devsize - data_offset - 8*2 - bbspace;
case 1:
case 2:
return devsize - data_offset;
devsize -= bmspace;
- 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));
+ return ((devsize - 8*2 - bbspace ) & ~(4*2-1));
case 1:
/* at start, 4K for superblock and possible bitmap */
- return devsize - 4*2;
+ return devsize - 4*2 - bbspace;
case 2:
/* 4k from start, 4K for superblock and possible bitmap */
- return devsize - (4+4)*2;
+ return devsize - (4+4)*2 - bbspace;
}
return 0;
}
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;
* been left.
*/
offset = 0;
- room = choose_bm_space(__le64_to_cpu(sb->size));
bbl_size = 8;
+ room = choose_bm_space(__le64_to_cpu(sb->size)) + bbl_size;
} else {
room = __le64_to_cpu(sb->super_offset)
- __le64_to_cpu(sb->data_offset)
case 2: /* between superblock and data */
if (creating) {
offset = 4*2;
- room = choose_bm_space(__le64_to_cpu(sb->size));
bbl_size = 8;
+ room = choose_bm_space(__le64_to_cpu(sb->size)) + bbl_size;
} else {
room = __le64_to_cpu(sb->data_offset)
- __le64_to_cpu(sb->super_offset);
/* Limit to 128K of bitmap when chunk size not requested */
room = 128*2;
+ if (room <= 1)
+ /* No room for a bitmap */
+ return 0;
+
max_bits = (room * 512 - sizeof(bitmap_super_t)) * 8;
min_chunk = 4096; /* sub-page chunks don't work yet.. */
char *subdev, unsigned long long *freesize,
int verbose)
{
- unsigned long long ldsize;
+ unsigned long long ldsize, devsize;
+ int bmspace;
+ unsigned long long headroom;
int fd;
if (level == LEVEL_CONTAINER) {
pr_err("1.x metadata does not support containers\n");
return 0;
}
- if (chunk && *chunk == UnSet)
+ if (*chunk == UnSet)
*chunk = DEFAULT_CHUNK;
if (!subdev)
return 1;
+ if (st->minor_version < 0)
+ /* not specified, so time to set default */
+ st->minor_version = 2;
+
fd = open(subdev, O_RDONLY|O_EXCL, 0);
if (fd < 0) {
if (verbose)
}
close(fd);
- *freesize = avail_size1(st, ldsize >> 9, data_offset);
+ devsize = ldsize >> 9;
+ if (devsize < 24) {
+ *freesize = 0;
+ return 0;
+ }
+
+ /* creating: allow suitable space for bitmap */
+ bmspace = choose_bm_space(devsize);
+
+ if (data_offset == INVALID_SECTORS)
+ data_offset = st->data_offset;
+ if (data_offset == INVALID_SECTORS)
+ switch (st->minor_version) {
+ case 0:
+ data_offset = 0;
+ break;
+ case 1:
+ case 2:
+ /* Choose data offset appropriate for this device
+ * and use as default for whole array.
+ * The data_offset must allow for bitmap space
+ * and base metadata, should allow for some headroom
+ * for reshape, and should be rounded to multiple
+ * of 1M.
+ * Headroom is limited to 128M, but aim for about 0.1%
+ */
+ headroom = 128*1024*2;
+ while ((headroom << 10) > devsize &&
+ (*chunk == 0 ||
+ headroom / 2 >= ((unsigned)(*chunk)*2)*2))
+ headroom >>= 1;
+ data_offset = 12*2 + bmspace + headroom;
+ #define ONE_MEG (2*1024)
+ if (data_offset > ONE_MEG)
+ data_offset = (data_offset / ONE_MEG) * ONE_MEG;
+ break;
+ }
+ if (st->data_offset == INVALID_SECTORS)
+ st->data_offset = data_offset;
+ switch(st->minor_version) {
+ case 0: /* metadata at end. Round down and subtract space to reserve */
+ devsize = (devsize & ~(4ULL*2-1));
+ /* space for metadata, bblog, bitmap */
+ devsize -= 8*2 + 8 + bmspace;
+ break;
+ case 1:
+ case 2:
+ devsize -= data_offset;
+ break;
+ }
+ *freesize = devsize;
return 1;
}
#endif /* MDASSEMBLE */
+void *super1_make_v0(struct supertype *st, struct mdinfo *info, mdp_super_t *sb0)
+{
+ /* Create a v1.0 superblock based on 'info'*/
+ void *ret;
+ struct mdp_superblock_1 *sb;
+ int i;
+ int rfd;
+ unsigned long long offset;
+
+ if (posix_memalign(&ret, 4096, 1024) != 0)
+ return NULL;
+ sb = ret;
+ memset(ret, 0, 1024);
+ sb->magic = __cpu_to_le32(MD_SB_MAGIC);
+ sb->major_version = __cpu_to_le32(1);
+
+ copy_uuid(sb->set_uuid, info->uuid, super1.swapuuid);
+ sprintf(sb->set_name, "%d", sb0->md_minor);
+ sb->ctime = __cpu_to_le32(info->array.ctime+1);
+ sb->level = __cpu_to_le32(info->array.level);
+ sb->layout = __cpu_to_le32(info->array.layout);
+ sb->size = __cpu_to_le64(info->component_size);
+ sb->chunksize = __cpu_to_le32(info->array.chunk_size/512);
+ sb->raid_disks = __cpu_to_le32(info->array.raid_disks);
+ if (info->array.level > 0)
+ sb->data_size = sb->size;
+ else
+ sb->data_size = st->ss->avail_size(st, st->devsize/512, 0);
+ sb->resync_offset = MaxSector;
+ sb->max_dev = __cpu_to_le32(MD_SB_DISKS);
+ sb->dev_number = __cpu_to_le32(info->disk.number);
+ sb->utime = __cpu_to_le64(info->array.utime);
+
+ offset = st->devsize/512 - 8*2;
+ offset &= ~(4*2-1);
+ sb->super_offset = __cpu_to_le64(offset);
+ //*(__u64*)(st->other + 128 + 8 + 8) = __cpu_to_le64(offset);
+
+ 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);
+
+ for (i = 0; i < MD_SB_DISKS; i++) {
+ int state = sb0->disks[i].state;
+ sb->dev_roles[i] = 0xFFFF;
+ if ((state & (1<<MD_DISK_SYNC)) &&
+ !(state & (1<<MD_DISK_FAULTY)))
+ sb->dev_roles[i] = __cpu_to_le16(sb0->disks[i].raid_disk);
+ }
+ sb->sb_csum = calc_sb_1_csum(sb);
+ return ret;
+}
+
struct superswitch super1 = {
#ifndef MDASSEMBLE
.examine_super = examine_super1,
.write_init_super = write_init_super1,
.validate_geometry = validate_geometry1,
.add_to_super = add_to_super1,
+ .examine_badblocks = examine_badblocks_super1,
+ .copy_metadata = copy_metadata1,
#endif
.match_home = match_home1,
.uuid_from_super = uuid_from_super1,
projects / thirdparty / mdadm.git / blobdiff