diff options
Diffstat (limited to 'super0.c')
| -rw-r--r-- | super0.c | 39 |
1 files changed, 39 insertions, 0 deletions
@@ -625,6 +625,26 @@ static int update_super0(struct supertype *st, struct mdinfo *info, uuid_from_super0(st, uuid); memcpy(bm->uuid, uuid, 16); } + } else if (strcmp(update, "metadata") == 0) { + /* Create some v1.0 metadata to match ours but make the + * ctime bigger. Also update info->array.*_version. + * We need to arrange that store_super writes out + * the v1.0 metadata. + * Not permitted for unclean array, or array with + * bitmap. + */ + if (info->bitmap_offset) { + pr_err("Cannot update metadata when bitmap is present\n"); + rv = -2; + } else if (info->array.state != 1) { + pr_err("Cannot update metadata on unclean array\n"); + rv = -2; + } else { + info->array.major_version = 1; + info->array.minor_version = 0; + uuid_from_super0(st, info->uuid); + st->other = super1_make_v0(st, info, st->sb); + } } else if (strcmp(update, "no-bitmap") == 0) { sb->state &= ~(1<<MD_SB_BITMAP_PRESENT); } else if (strcmp(update, "_reshape_progress")==0) @@ -788,6 +808,24 @@ static int store_super0(struct supertype *st, int fd) if (dsize < MD_RESERVED_SECTORS*512) return 2; + if (st->other) { + /* Writing out v1.0 metadata for --update=metadata */ + int ret; + + offset = dsize/512 - 8*2; + offset &= ~(4*2-1); + offset *= 512; + if (lseek64(fd, offset, 0)< 0LL) + ret = 3; + else if (write(fd, st->other, 1024) != 1024) + ret = 4; + else + fsync(fd); + free(st->other); + st->other = NULL; + return ret; + } + offset = MD_NEW_SIZE_SECTORS(dsize>>9); offset *= 512; @@ -915,6 +953,7 @@ static int load_super0(struct supertype *st, int fd, char *devname) devname, dsize); return 1; } + st->devsize = dsize; offset = MD_NEW_SIZE_SECTORS(dsize>>9); |