diff options
Diffstat (limited to 'super0.c')
| -rw-r--r-- | super0.c | 19 |
1 files changed, 17 insertions, 2 deletions
@@ -28,7 +28,7 @@ */ #include "mdadm.h" - +#include <openssl/sha.h> /* for SHA1 */ /* * All handling for the 0.90.0 version superblock is in * this file. @@ -449,9 +449,17 @@ static __u64 event_super0(void *sbv) return md_event(sb); } +/* + * For verion-0 superblock, the homehost is 'stored' in the + * uuid. 8 bytes for a hash of the host leaving 8 bytes + * of random material. + * We use the first 8 bytes (64bits) of the sha1 of the + * host name + */ -static int init_super0(struct supertype *st, void **sbp, mdu_array_info_t *info, unsigned long long size, char *ignored_name) +static int init_super0(struct supertype *st, void **sbp, mdu_array_info_t *info, + unsigned long long size, char *ignored_name, char *homehost) { mdp_super_t *sb = malloc(MD_SB_BYTES + sizeof(bitmap_super_t)); int spares; @@ -460,6 +468,7 @@ static int init_super0(struct supertype *st, void **sbp, mdu_array_info_t *info, if (info->major_version == -1) { /* zeroing the superblock */ + *sbp = sb; return 0; } @@ -494,6 +503,12 @@ static int init_super0(struct supertype *st, void **sbp, mdu_array_info_t *info, } if (rfd >= 0) close(rfd); + if (homehost) { + unsigned char *hash = SHA1((unsigned char*)homehost, + strlen(homehost), + NULL); + memcpy(&sb->set_uuid2, hash, 8); + } sb->utime = sb->ctime; sb->state = info->state; |