*/
#include "mdadm.h"
+#include <asm/byteorder.h>
/*
* All handling for the 0.90.0 version superblock is in
return newcsum;
}
+
+void super0_swap_endian(struct mdp_superblock_s *sb)
+{
+ /* as super0 superblocks are host-endian, it is sometimes
+ * useful to be able to swap the endianness
+ * as (almost) everything is u32's we byte-swap every 4byte
+ * number.
+ * We then also have to swap the events_hi and events_lo
+ */
+ char *sbc = (char *)sb;
+ __u32 t32;
+ int i;
+
+ for (i=0; i < MD_SB_BYTES ; i+=4) {
+ char t = sbc[i];
+ sbc[i] = sbc[i+3];
+ sbc[i+3] = t;
+ t=sbc[i+1];
+ sbc[i+1]=sbc[i+2];
+ sbc[i+2]=t;
+ }
+ t32 = sb->events_hi;
+ sb->events_hi = sb->events_lo;
+ sb->events_lo = t32;
+
+ t32 = sb->cp_events_hi;
+ sb->cp_events_hi = sb->cp_events_lo;
+ sb->cp_events_lo = t32;
+
+}
+
+#ifndef MDASSEMBLE
+
static void examine_super0(void *sbv)
{
mdp_super_t *sb = sbv;
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);
mdp_disk_t *dp;
char *dv;
char nb[5];
+ int wonly;
if (d>=0) dp = &sb->disks[d];
else dp = &sb->this_disk;
- sprintf(nb, "%4d", d);
+ snprintf(nb, sizeof(nb), "%4d", d);
printf("%4s %5d %5d %5d %5d ", d < 0 ? "this" : nb,
dp->number, dp->major, dp->minor, dp->raid_disk);
+ wonly = dp->state & (1<<MD_DISK_WRITEMOSTLY);
+ dp->state &= ~(1<<MD_DISK_WRITEMOSTLY);
if (dp->state & (1<<MD_DISK_FAULTY)) printf(" faulty");
if (dp->state & (1<<MD_DISK_ACTIVE)) printf(" active");
if (dp->state & (1<<MD_DISK_SYNC)) printf(" sync");
if (dp->state & (1<<MD_DISK_REMOVED)) printf(" removed");
+ if (wonly) printf(" write-mostly");
if (dp->state == 0) printf(" spare");
if ((dv=map_dev(dp->major, dp->minor)))
printf(" %s", dv);
else
printf("%08x", sb->set_uuid0);
}
-
+#endif
static void uuid_from_super0(int uuid[4], void * sbv)
{
mdp_super_t *super = sbv;
}
}
-static void getinfo_super0(struct mdinfo *info, void *sbv)
+static void getinfo_super0(struct mdinfo *info, mddev_ident_t ident, void *sbv)
{
mdp_super_t *sb = sbv;
int working = 0;
info->disk.major = sb->this_disk.major;
info->disk.minor = sb->this_disk.minor;
info->disk.raid_disk = sb->this_disk.raid_disk;
+ info->disk.number = sb->this_disk.number;
info->events = md_event(sb);
uuid_from_super0(info->uuid, sbv);
-
+
+ ident->name[0] = 0;
/* work_disks is calculated rather than read directly */
for (i=0; i < MD_SB_DISKS; i++)
if ((sb->disks[i].state & (1<<MD_DISK_SYNC)) &&
memcpy(sb32+MD_SB_GENERIC_CONSTANT_WORDS+7,
sb32+MD_SB_GENERIC_CONSTANT_WORDS+7+1,
(MD_SB_WORDS - (MD_SB_GENERIC_CONSTANT_WORDS+7+1))*4);
- fprintf (stderr, Name ": adjusting superblock of %s for 2.2/sparc compatability.\n",
- devname);
+ if (verbose >= 0)
+ fprintf (stderr, Name ": adjusting superblock of %s for 2.2/sparc compatability.\n",
+ devname);
}
if (strcmp(update, "super-minor") ==0) {
sb->md_minor = info->array.md_minor;
- if (verbose)
+ if (verbose > 0)
fprintf(stderr, Name ": updating superblock of %s with minor number %d\n",
devname, info->array.md_minor);
}
}
if (strcmp(update, "assemble")==0) {
int d = info->disk.number;
+ int wonly = sb->disks[d].state & (1<<MD_DISK_WRITEMOSTLY);
+ sb->disks[d].state &= ~(1<<MD_DISK_WRITEMOSTLY);
if (sb->disks[d].state != info->disk.state) {
- sb->disks[d].state = info->disk.state;
+ sb->disks[d].state = info->disk.state & wonly;
rv = 1;
}
}
-static void init_super0(void **sbp, mdu_array_info_t *info)
+static int init_super0(struct supertype *st, void **sbp, mdu_array_info_t *info, char *ignored_name)
{
- mdp_super_t *sb = malloc(MD_SB_BYTES);
- memset(sb, 0, MD_SB_BYTES);
+ mdp_super_t *sb = malloc(MD_SB_BYTES + sizeof(bitmap_super_t));
+ int spares;
+ int rfd;
+ memset(sb, 0, MD_SB_BYTES + sizeof(bitmap_super_t));
if (info->major_version == -1) {
/* zeroing the superblock */
- return;
+ return 0;
}
+ spares = info->working_disks - info->active_disks;
+ if (info->raid_disks + spares > MD_SB_DISKS) {
+ fprintf(stderr, Name ": too many devices requested: %d+%d > %d\n",
+ info->raid_disks , spares, MD_SB_DISKS);
+ 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;
sb->chunk_size = info->chunk_size;
*sbp = sb;
+ return 1;
}
/* Add a device to the superblock being created */
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;
}
-static int write_init_super0(void *sbv, mdu_disk_info_t *dinfo, char *devname)
+static int write_init_super0(struct supertype *st, void *sbv, mdu_disk_info_t *dinfo, char *devname, int reserve)
{
mdp_super_t *sb = sbv;
- int fd = open(devname, O_RDWR, O_EXCL);
+ int fd = open(devname, O_RDWR|O_EXCL);
int rv;
if (fd < 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;
+ }
+ fsync(fd);
+ if (towrite)
+ rv = -2;
+ }
+
close(fd);
if (rv)
fprintf(stderr, Name ": failed to write superblock to %s\n", devname);
uuid_from_super0(uuid1, first);
uuid_from_super0(uuid2, second);
- if (!same_uuid(uuid1, uuid2))
+ if (!same_uuid(uuid1, uuid2, 0))
return 2;
if (first->major_version != second->major_version ||
first->minor_version != second->minor_version ||
}
-static int load_super0(int fd, void **sbp, char *devname)
+static int load_super0(struct supertype *st, int fd, void **sbp, char *devname)
{
/* try to read in the superblock
* Return:
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)
return 1;
}
+ if (st->ss && st->minor_version == 9)
+ super0_swap_endian(super);
+
if (super->md_magic != MD_SB_MAGIC) {
if (devname)
fprintf(stderr, Name ": No super block found on %s (Expected magic %08x, got %08x)\n",
return 2;
}
*sbp = super;
+ if (st->ss == NULL) {
+ st->ss = &super0;
+ st->minor_version = 90;
+ st->max_devs = MD_SB_DISKS;
+ }
+
return 0;
}
-static int match_metadata_desc0(char *arg)
+static struct supertype *match_metadata_desc0(char *arg)
{
+ struct supertype *st = malloc(sizeof(*st));
+ if (!st) return st;
+
+ 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 1;
- return 0;
+ return st;
+
+ st->minor_version = 9; /* flag for 'byte-swapped' */
+ if (strcmp(arg, "0.swap")==0)
+ return st;
+
+ free(st);
+ return NULL;
+}
+
+static __u64 avail_size0(struct supertype *st, __u64 devsize, int reserve)
+{
+ if (devsize < MD_RESERVED_SECTORS*2)
+ return 0ULL;
+ if (reserve > 64*2) return 0ULL;
+ return MD_NEW_SIZE_SECTORS(devsize);
+}
+
+static int add_internal_bitmap0(struct supertype *st, void *sbv, int chunk, int delay, int write_behind, 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 = 4096; /* sub-page chunks don't work yet.. */
+ 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 = __cpu_to_le32(BITMAP_MAGIC);
+ bms->version = __cpu_to_le32(BITMAP_MAJOR);
+ uuid_from_super0((int*)bms->uuid, sb);
+ 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);
+
+
+
+ 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;
+ }
+ fsync(fd);
+ if (towrite)
+ rv = -2;
+
+ return rv;
}
struct superswitch super0 = {
+#ifndef MDASSEMBLE
.examine_super = examine_super0,
.brief_examine_super = brief_examine_super0,
.detail_super = detail_super0,
.brief_detail_super = brief_detail_super0,
+#endif
.uuid_from_super = uuid_from_super0,
.getinfo_super = getinfo_super0,
.update_super = update_super0,
.compare_super = compare_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,
+ .swapuuid = 0,
};
projects / thirdparty / mdadm.git / blobdiff