*/
#include "mdadm.h"
-
+#include <endian.h>
#include "asm/byteorder.h"
/*
* The version-1 superblock :
__u32 chunksize; /* in 512byte sectors */
__u32 raid_disks;
- __u8 pad1[128-96]; /* set to 0 when written */
+ __u32 bitmap_offset; /* sectors after start of superblock that bitmap starts
+ * NOTE: signed, so bitmap can be before superblock
+ * only meaningful of feature_map[0] is set.
+ */
+ __u8 pad1[128-100]; /* set to 0 when written */
/* 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 pad2[64-56]; /* set to 0 when writing */
+ __u8 devflags; /* per-device flags. Only one defined...*/
+#define WriteMostly1 1 /* mask for writemostly flag in above */
+ __u8 pad2[64-57]; /* set to 0 when writing */
/* array state information - 64 bytes */
__u64 utime; /* 40 bits second, 24 btes microseconds */
printf(" Version : %02d.%02d\n", 1, __le32_to_cpu(sb->feature_map));
printf(" Array UUID : ");
for (i=0; i<16; i++) {
- printf("%02x", sb->set_uuid[i]);
if ((i&3)==0 && i != 0) printf(":");
+ printf("%02x", sb->set_uuid[i]);
}
printf("\n");
printf(" Name : %.32s\n", sb->set_name);
printf(" State : %s\n", (__le64_to_cpu(sb->resync_offset)+1)? "active":"clean");
printf(" Device UUID : ");
for (i=0; i<16; i++) {
- printf("%02x", sb->set_uuid[i]);
if ((i&3)==0 && i != 0) printf(":");
+ printf("%02x", sb->device_uuid[i]);
}
printf("\n");
+ if (sb->devflags) {
+ printf(" Flags :");
+ if (sb->devflags & WriteMostly1)
+ printf(" write-mostly");
+ printf("\n");
+ }
atime = __le64_to_cpu(sb->utime) & 0xFFFFFFFFFFULL;
printf(" Update Time : %.24s\n", ctime(&atime));
printf("%02x", sb->set_uuid[i]);
if ((i&3)==0 && i != 0) printf(":");
}
+ if (sb->set_name[0])
+ printf(" name=%.32s", sb->set_name);
printf("\n");
}
struct mdp_superblock_1 *sb = sbv;
int i;
+ printf(" Name : %.32s\n", sb->set_name);
printf(" UUID : ");
for (i=0; i<16; i++) {
- printf("%02x", sb->set_uuid[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));
}
struct mdp_superblock_1 *sb = sbv;
int i;
+ if (sb->set_name[0])
+ printf(" name=%.32s", sb->set_name);
printf(" UUID=");
for (i=0; i<16; i++) {
- printf("%02x", sb->set_uuid[i]);
if ((i&3)==0 && i != 0) printf(":");
+ printf("%02x", sb->set_uuid[i]);
}
}
cuuid[i] = super->set_uuid[i];
}
-static void getinfo_super1(struct mdinfo *info, void *sbv)
+static void getinfo_super1(struct mdinfo *info, mddev_ident_t ident, void *sbv)
{
struct mdp_superblock_1 *sb = sbv;
int working = 0;
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->max_dev) > 512)
role = 0xfffe;
memcpy(info->uuid, sb->set_uuid, 16);
+ strncpy(ident->name, sb->set_name, 32);
+ ident->name[32] = 0;
+
for (i=0; i< __le32_to_cpu(sb->max_dev); i++) {
role = __le16_to_cpu(sb->dev_roles[i]);
- if (role == 0xFFFF || role < info->array.raid_disks)
+ if (/*role == 0xFFFF || */role < info->array.raid_disks)
working++;
}
return __le64_to_cpu(sb->events);
}
-static int init_super1(struct supertype *st, void **sbp, mdu_array_info_t *info)
+static int init_super1(struct supertype *st, void **sbp, mdu_array_info_t *info, char *name)
{
- struct mdp_superblock_1 *sb = malloc(1024);
+ struct mdp_superblock_1 *sb = malloc(1024 + sizeof(bitmap_super_t));
int spares;
+ int rfd;
memset(sb, 0, 1024);
if (info->major_version == -1)
sb->major_version = __cpu_to_le32(1);
sb->feature_map = 0;
sb->pad0 = 0;
- *(__u32*)(sb->set_uuid) = random();
- *(__u32*)(sb->set_uuid+4) = random();
- *(__u32*)(sb->set_uuid+8) = random();
- *(__u32*)(sb->set_uuid+12) = random();
- /* FIXME name */
+ if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 ||
+ read(rfd, sb->set_uuid, 16) != 16) {
+ *(__u32*)(sb->set_uuid) = random();
+ *(__u32*)(sb->set_uuid+4) = random();
+ *(__u32*)(sb->set_uuid+8) = random();
+ *(__u32*)(sb->set_uuid+12) = random();
+ }
+ if (rfd >= 0) close(rfd);
+
+ memset(sb->set_name, 0, 32);
+ strcpy(sb->set_name, name);
sb->ctime = __cpu_to_le64((unsigned long long)time(0));
sb->level = __cpu_to_le32(info->level);
sb->resync_offset = ~0ULL;
else
sb->resync_offset = 0;
- sb->max_dev = __cpu_to_le32((1024- sizeof(struct mdp_superblock_1))/
+ sb->max_dev = __cpu_to_le32((1024- sizeof(struct mdp_superblock_1))/
sizeof(sb->dev_roles[0]));
memset(sb->pad3, 0, sizeof(sb->pad3));
{
struct mdp_superblock_1 *sb = sbv;
__u16 *rp = sb->dev_roles + dk->number;
- if (dk->state == 6) /* active, sync */
+ 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
+ else
*rp = 0xfffe;
}
}
-
+
if (sb_offset != __le64_to_cpu(sb->super_offset) &&
0 != __le64_to_cpu(sb->super_offset)
) {
static int load_super1(struct supertype *st, int fd, void **sbp, char *devname);
-static int write_init_super1(struct supertype *st, void *sbv, mdu_disk_info_t *dinfo, char *devname)
+static int write_init_super1(struct supertype *st, void *sbv,
+ mdu_disk_info_t *dinfo, char *devname)
{
struct mdp_superblock_1 *sb = sbv;
struct mdp_superblock_1 *refsb = NULL;
}
sb->dev_number = __cpu_to_le32(dinfo->number);
+ if (dinfo->state & (1<<MD_DISK_WRITEMOSTLY))
+ sb->devflags |= WriteMostly1;
if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 ||
read(rfd, sb->device_uuid, 16) != 16) {
}
free(refsb);
}
-
+
if (ioctl(fd, BLKGETSIZE, &size)) {
close(fd);
return 1;
sb_offset &= ~(4*2-1);
sb->super_offset = __cpu_to_le64(sb_offset);
sb->data_offset = __cpu_to_le64(0);
- sb->data_size = sb->super_offset;
+ sb->data_size = __cpu_to_le64(sb_offset);
break;
case 1:
sb->super_offset = __cpu_to_le64(0);
- sb->data_offset = __cpu_to_le64(2);
- sb->data_size = __cpu_to_le64(size - 2);
+ sb->data_offset = __cpu_to_le64(4*2); /* leave 4k for super and bitmap */
+ sb->data_size = __cpu_to_le64(size - 4*2);
break;
case 2:
sb_offset = 4*2;
sb->super_offset = __cpu_to_le64(sb_offset);
- sb->data_offset = __cpu_to_le64(sb_offset+2);
- sb->data_size = __cpu_to_le64(size - 4*2 - 2);
+ sb->data_offset = __cpu_to_le64(sb_offset+4*2);
+ sb->data_size = __cpu_to_le64(size - 4*2 - 4*2);
break;
default:
return -EINVAL;
rv = store_super1(st, fd, sb);
if (rv)
fprintf(stderr, Name ": failed to write superblock to %s\n", devname);
+
+ if (rv == 0 && (__le32_to_cpu(sb->feature_map) & 1))
+ rv = st->ss->write_bitmap(st, fd, sbv);
close(fd);
return rv;
}
return 2;
}
if (ioctl(fd, BLKGETSIZE, &size)) {
- if (devname)
+ if (devname)
fprintf(stderr, Name ": cannot find device size for %s: %s\n",
devname, strerror(errno));
return 1;
return 1;
}
- super = malloc(1024);
+ super = malloc(1024 + sizeof(bitmap_super_t));
if (read(fd, super, 1024) != 1024) {
if (devname)
return NULL;
}
-static __u64 avail_size1(__u64 devsize)
+/* 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)
{
if (devsize < 24)
return 0;
- return (devsize - 8*2 ) & ~(4*2-1);
+ 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, void *sbv,
+ int chunk, int delay, int write_behind, int *sizep, int may_change)
+{
+ /*
+ * If not may_change, then this is a 'Grow', and the bitmap
+ * must fit after the superblock.
+ * If may_change, then this is create, and we can put the bitmap
+ * before the superblock if we like, or may move the start.
+ * For now, just squeeze the bitmap into 3k and don't change anything.
+ *
+ * size is in K, chunk is in bytes !!!
+ */
+
+ unsigned long long size = *sizep;
+ unsigned long long bits;
+ unsigned long long max_bits = (3*512 - sizeof(bitmap_super_t)) * 8;
+ unsigned long long min_chunk;
+ struct mdp_superblock_1 *sb = sbv;
+ bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb) + 1024);
+
+ if (st->minor_version && !may_change &&
+ __le64_to_cpu(sb->data_offset) - __le64_to_cpu(sb->super_offset) < 8)
+ return 0; /* doesn't fit */
+
+
+
+ min_chunk = 4096; /* sub-page chunks don't work yet.. */
+ bits = (size*1024)/min_chunk +1;
+ while (bits > max_bits) {
+ min_chunk *= 2;
+ bits = (bits+1)/2;
+ }
+ if (chunk == UnSet)
+ chunk = min_chunk;
+ else if (chunk < min_chunk)
+ return 0; /* chunk size too small */
+
+ sb->bitmap_offset = __cpu_to_le32(2);
+
+ sb->feature_map = __cpu_to_le32(__le32_to_cpu(sb->feature_map) | 1);
+ memset(bms, sizeof(*bms), 0);
+ bms->magic = __cpu_to_le32(BITMAP_MAGIC);
+ bms->version = __cpu_to_le32(BITMAP_MAJOR);
+ uuid_from_super1((int*)bms->uuid, sb);
+ bms->chunksize = __cpu_to_le32(chunk);
+ bms->daemon_sleep = __cpu_to_le32(delay);
+ bms->sync_size = __cpu_to_le64(size<<1);
+ bms->write_behind = __cpu_to_le32(write_behind);
+
+ return 1;
+}
+
+
+void locate_bitmap1(struct supertype *st, int fd)
+{
+ unsigned long long offset;
+ struct mdp_superblock_1 *sb;
+
+ if (st->ss->load_super(st, fd, (void**)&sb, NULL))
+ return; /* no error I hope... */
+ offset = __le64_to_cpu(sb->super_offset);
+ offset += (long) __le32_to_cpu(sb->bitmap_offset);
+
+ lseek64(fd, offset<<9, 0);
+}
+
+int write_bitmap1(struct supertype *st, int fd, void *sbv)
+{
+ struct mdp_superblock_1 *sb = sbv;
+ bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb)+1024);
+ int rv = 0;
+
+ int towrite, n;
+ char buf[4096];
+
+ locate_bitmap1(st, fd);
+
+ write(fd, ((char*)sb)+1024, sizeof(bitmap_super_t));
+ towrite = __le64_to_cpu(bms->sync_size) / (__le32_to_cpu(bms->chunksize)>>9);
+ towrite = (towrite+7) >> 3; /* bits to bytes */
+ memset(buf, 0xff, sizeof(buf));
+ while (towrite > 0) {
+ n = towrite;
+ if (n > sizeof(buf))
+ n = sizeof(buf);
+ n = write(fd, buf, n);
+ if (n > 0)
+ towrite -= n;
+ else
+ break;
+ }
+ fsync(fd);
+ if (towrite)
+ rv = -2;
+
+ return rv;
}
struct superswitch 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,
.major = 1,
+#if __BYTE_ORDER == BIG_ENDIAN
+ .swapuuid = 0,
+#else
+ .swapuuid = 1,
+#endif
};
projects / thirdparty / mdadm.git / blobdiff