return 0;
}
-void uuid_from_super(int uuid[4], mdp_super_t *super)
-{
- uuid[0] = super->set_uuid0;
- if (super->minor_version >= 90) {
- uuid[1] = super->set_uuid1;
- uuid[2] = super->set_uuid2;
- uuid[3] = super->set_uuid3;
- } else {
- uuid[1] = 0;
- uuid[2] = 0;
- uuid[3] = 0;
- }
-}
-
-int compare_super(mdp_super_t *first, mdp_super_t *second)
-{
- /*
- * return:
- * 0 same, or first was empty, and second was copied
- * 1 second had wrong number
- * 2 wrong uuid
- * 3 wrong other info
- */
- int uuid1[4], uuid2[4];
- if (second->md_magic != MD_SB_MAGIC)
- return 1;
- if (first-> md_magic != MD_SB_MAGIC) {
- memcpy(first, second, sizeof(*first));
- return 0;
- }
-
- uuid_from_super(uuid1, first);
- uuid_from_super(uuid2, second);
- if (!same_uuid(uuid1, uuid2))
- return 2;
- if (first->major_version != second->major_version ||
- first->minor_version != second->minor_version ||
- first->patch_version != second->patch_version ||
- first->gvalid_words != second->gvalid_words ||
- first->ctime != second->ctime ||
- first->level != second->level ||
- first->size != second->size ||
- first->raid_disks != second->raid_disks )
- return 3;
-
- return 0;
-}
-
-int load_super(int fd, mdp_super_t *super)
-{
- /* try to read in the superblock
- *
- * return
- * 0 - success
- * 1 - no block size
- * 2 - too small
- * 3 - no seek
- * 4 - no read
- * 5 - no magic
- * 6 - wrong major version
- */
- unsigned long size;
- unsigned long long dsize;
- unsigned long long offset;
-
-#ifdef BLKGETSIZE64
- if (ioctl(fd, BLKGETSIZE64, &dsize) != 0)
-#endif
- {
- if (ioctl(fd, BLKGETSIZE, &size))
- return 1;
- else
- dsize = size << 9;
- }
-
- if (dsize < MD_RESERVED_SECTORS*2)
- return 2;
-
- offset = MD_NEW_SIZE_SECTORS(dsize>>9);
-
- offset *= 512;
-
- ioctl(fd, BLKFLSBUF, 0); /* make sure we read current data */
-
- if (lseek64(fd, offset, 0)< 0LL)
- return 3;
-
- if (read(fd, super, sizeof(*super)) != sizeof(*super))
- return 4;
-
- if (super->md_magic != MD_SB_MAGIC)
- return 5;
-
- if (super->major_version != 0)
- return 6;
- return 0;
-}
-
-int store_super(int fd, mdp_super_t *super)
-{
- unsigned long size;
- unsigned long long dsize;
-
- long long offset;
-
-#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 2;
-
- offset = MD_NEW_SIZE_SECTORS(dsize>>9);
-
- offset *= 512;
-
- if (lseek64(fd, offset, 0)< 0LL)
- return 3;
-
- if (write(fd, super, sizeof(*super)) != sizeof(*super))
- return 4;
-
- fsync(fd);
- return 0;
-}
-
-
-
int check_ext2(int fd, char *name)
{
/*
int check_raid(int fd, char *name)
{
- mdp_super_t super;
+ void *super;
+ struct mdinfo info;
time_t crtime;
- if (load_super(fd, &super))
- return 0;
- /* Looks like a raid array .. */
- fprintf(stderr, Name ": %s appears to be part of a raid array:\n",
- name);
- crtime = super.ctime;
- fprintf(stderr, " level=%d devices=%d ctime=%s",
- super.level, super.raid_disks, ctime(&crtime));
- return 1;
+
+ int i;
+ for (i=0; superlist[i]; i++) {
+ if (superlist[i]->load_super(fd, &super, name))
+ continue;
+ /* Looks like a raid array .. */
+ fprintf(stderr, Name ": %s appears to be part of a raid array:\n",
+ name);
+ superlist[i]->getinfo_super(&info, super);
+ free(super);
+ crtime = info.array.ctime;
+ fprintf(stderr, " level=%d devices=%d ctime=%s",
+ info.array.level, info.array.raid_disks, ctime(&crtime));
+ return 1;
+ }
+ return 0;
}
#endif
-unsigned long calc_sb_csum(mdp_super_t *super)
+unsigned long calc_csum(void *super, int bytes)
{
- unsigned int oldcsum = super->sb_csum;
unsigned long long newcsum = 0;
- unsigned long csum;
int i;
- unsigned int *superc = (int*) super;
- super->sb_csum = 0;
+ unsigned int csum;
+ unsigned int *superc = (unsigned int*) super;
- for(i=0; i<MD_SB_BYTES/4; i++)
+ for(i=0; i<bytes/4; i++)
newcsum+= superc[i];
csum = (newcsum& 0xffffffff) + (newcsum>>32);
- super->sb_csum = oldcsum;
return csum;
}
if (strncmp(name, "/dev/.tmp.md", 12)==0)
unlink(name);
}
+
+
+
+
+struct superswitch *superlist[] = { &super0, NULL };
+
+struct superswitch *super_by_version(int vers)
+{
+ if (vers == 0) return &super0;
+ return NULL;
+}
+
+struct superswitch *guess_super(int fd, char *dev)
+{
+ /* try each load_super to find the best match,
+ * and return the best superswitch
+ */
+ struct superswitch *best = NULL, *ss;
+ int bestrv = 0;
+ void *sbp = NULL;
+ int i;
+
+ for (i=0 ; superlist[i]; i++) {
+ int rv;
+ ss = superlist[i];
+ rv = ss->load_super(fd, &sbp, NULL);
+ if (rv == 0) {
+ free(sbp);
+ return ss;
+ }
+ if (rv > bestrv) {
+ bestrv = rv;
+ best = ss;
+ }
+ }
+ if (bestrv > 2) /* FIXME */
+ return best;
+ return NULL;
+}
projects / thirdparty / mdadm.git / blobdiff