*/
#include "mdadm.h"
+#include <asm/byteorder.h>
/*
* All handling for the 0.90.0 version superblock is in
printf(" Update Time : %.24s\n", ctime(&atime));
printf(" State : %s\n",
(sb->state&(1<<MD_SB_CLEAN))?"clean":"active");
+ if (sb->state & (1<<MD_SB_BITMAP_PRESENT))
+ printf("Internal Bitmap : present\n");
printf(" Active Devices : %d\n", sb->active_disks);
printf("Working Devices : %d\n", sb->working_disks);
printf(" Failed Devices : %d\n", sb->failed_disks);
-static int init_super0(void **sbp, mdu_array_info_t *info)
+static int init_super0(struct supertype *st, void **sbp, mdu_array_info_t *info)
{
- mdp_super_t *sb = malloc(MD_SB_BYTES);
+ mdp_super_t *sb = malloc(MD_SB_BYTES + sizeof(bitmap_super_t));
int spares;
- memset(sb, 0, MD_SB_BYTES);
+ int rfd;
+ memset(sb, 0, MD_SB_BYTES + sizeof(bitmap_super_t));
if (info->major_version == -1) {
/* zeroing the superblock */
return 0;
}
+ rfd = open("/dev/urandom", O_RDONLY);
sb->md_magic = MD_SB_MAGIC;
sb->major_version = 0;
sb->minor_version = 90;
sb->patch_version = 0;
sb->gvalid_words = 0; /* ignored */
- sb->set_uuid0 = random();
+ if (rfd < 0 || read(rfd, &sb->set_uuid0, 4) != 4)
+ sb->set_uuid0 = random();
sb->ctime = time(0);
sb->level = info->level;
sb->size = info->size;
sb->raid_disks = info->raid_disks;
sb->md_minor = info->md_minor;
sb->not_persistent = 0;
- sb->set_uuid1 = random();
- sb->set_uuid2 = random();
- sb->set_uuid3 = random();
+ if (rfd < 0 || read(rfd, &sb->set_uuid1, 12) != 12) {
+ sb->set_uuid1 = random();
+ sb->set_uuid2 = random();
+ sb->set_uuid3 = random();
+ }
+ if (rfd >= 0)
+ close(rfd);
sb->utime = sb->ctime;
sb->state = info->state;
sb->active_disks = info->active_disks;
sb->working_disks = info->working_disks;
sb->failed_disks = info->failed_disks;
+ sb->spare_disks = info->spare_disks;
sb->events_hi = 0;
sb->events_lo = 1;
dk->state = dinfo->state;
}
-static int store_super0(int fd, void *sbv)
+static int store_super0(struct supertype *st, int fd, void *sbv)
{
unsigned long size;
unsigned long long dsize;
if (write(fd, super, sizeof(*super)) != sizeof(*super))
return 4;
+ fsync(fd);
return 0;
}
return -1;
}
+ sb->disks[dinfo->number].state &= ~(1<<MD_DISK_FAULTY);
+ sb->disks[dinfo->number].state |= (1<<MD_DISK_SYNC);
+
sb->this_disk = sb->disks[dinfo->number];
sb->sb_csum = calc_sb0_csum(sb);
- rv = store_super0(fd, sb);
+ rv = store_super0(st, fd, sb);
+
+ if (sb->state & (1<<MD_SB_BITMAP_PRESENT)) {
+ int towrite, n;
+ char buf[4096];
+ write(fd, ((char*)sb)+MD_SB_BYTES, sizeof(bitmap_super_t));
+ towrite = 64*1024 - MD_SB_BYTES - sizeof(bitmap_super_t);
+ 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;
+ }
+ if (towrite)
+ rv = -2;
+ }
+
close(fd);
if (rv)
fprintf(stderr, Name ": failed to write superblock to %s\n", devname);
return 1;
}
- super = malloc(MD_SB_BYTES);
+ super = malloc(MD_SB_BYTES + sizeof(bitmap_super_t));
if (read(fd, super, sizeof(*super)) != MD_SB_BYTES) {
if (devname)
if (st->ss == NULL) {
st->ss = &super0;
st->minor_version = 90;
+ st->max_devs = MD_SB_DISKS;
}
return 0;
st->ss = &super0;
st->minor_version = 90;
+ st->max_devs = MD_SB_DISKS;
if (strcmp(arg, "0") == 0 ||
strcmp(arg, "0.90") == 0 ||
strcmp(arg, "default") == 0
return MD_NEW_SIZE_SECTORS(devsize);
}
+static int add_internal_bitmap0(void *sbv, int chunk, int delay, unsigned long long size)
+{
+ /*
+ * The bitmap comes immediately after the superblock and must be 60K in size
+ * at most. The default size is between 30K and 60K
+ *
+ * size is in K, chunk is in bytes !!!
+ */
+
+ unsigned long long bits = size;
+ unsigned long long max_bits = 60*1024*8;
+ unsigned long long min_chunk;
+ mdp_super_t *sb = sbv;
+ bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb) + MD_SB_BYTES);
+
+
+ min_chunk = 1024;
+ 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->state |= (1<<MD_SB_BITMAP_PRESENT);
+
+ memset(bms, sizeof(*bms), 0);
+ bms->magic = __le32_to_cpu(BITMAP_MAGIC);
+ bms->version = __le32_to_cpu(BITMAP_MAJOR);
+ uuid_from_super0((int*)bms->uuid, sb);
+ bms->chunksize = __le32_to_cpu(chunk);
+ bms->daemon_sleep = __le32_to_cpu(delay);
+ bms->sync_size = __le64_to_cpu(size);
+
+
+
+ return 1;
+}
+
+
+void locate_bitmap0(struct supertype *st, int fd)
+{
+ unsigned long long dsize;
+ unsigned long size;
+ unsigned long long offset;
+#ifdef BLKGETSIZE64
+ if (ioctl(fd, BLKGETSIZE64, &dsize) != 0)
+#endif
+ {
+ if (ioctl(fd, BLKGETSIZE, &size))
+ return;
+ else
+ dsize = ((unsigned long long)size)<<9;
+ }
+
+ if (dsize < MD_RESERVED_SECTORS*2)
+ return;
+
+ offset = MD_NEW_SIZE_SECTORS(dsize>>9);
+
+ offset *= 512;
+
+ offset += MD_SB_BYTES;
+
+ lseek64(fd, offset, 0);
+}
+
+int write_bitmap0(struct supertype *st, int fd, void *sbv)
+{
+ unsigned long size;
+ unsigned long long dsize;
+ unsigned long long offset;
+ mdp_super_t *sb = sbv;
+
+ int rv = 0;
+
+ int towrite, n;
+ char buf[4096];
+
+#ifdef BLKGETSIZE64
+ if (ioctl(fd, BLKGETSIZE64, &dsize) != 0)
+#endif
+ {
+ if (ioctl(fd, BLKGETSIZE, &size))
+ return 1;
+ else
+ dsize = ((unsigned long long)size)<<9;
+ }
+
+ if (dsize < MD_RESERVED_SECTORS*2)
+ return -1;
+
+ offset = MD_NEW_SIZE_SECTORS(dsize>>9);
+
+ offset *= 512;
+
+ if (lseek64(fd, offset + 4096, 0)< 0LL)
+ return 3;
+
+
+ write(fd, ((char*)sb)+MD_SB_BYTES, sizeof(bitmap_super_t));
+ towrite = 64*1024 - MD_SB_BYTES - sizeof(bitmap_super_t);
+ 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;
+ }
+ if (towrite)
+ rv = -2;
+
+ return rv;
+}
+
+
struct superswitch super0 = {
.examine_super = examine_super0,
.brief_examine_super = brief_examine_super0,
.load_super = load_super0,
.match_metadata_desc = match_metadata_desc0,
.avail_size = avail_size0,
+ .add_internal_bitmap = add_internal_bitmap0,
+ .locate_bitmap = locate_bitmap0,
+ .write_bitmap = write_bitmap0,
.major = 0,
};
projects / thirdparty / mdadm.git / blobdiff