diff options
Diffstat (limited to 'drivers/md/md.c')
| -rw-r--r-- | drivers/md/md.c | 69 |
1 files changed, 66 insertions, 3 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c index d169bc964676..b9dfdfccdb78 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -662,7 +662,8 @@ static int super_90_load(mdk_rdev_t *rdev, mdk_rdev_t *refdev, int minor_version } if (sb->major_version != 0 || - sb->minor_version != 90) { + sb->minor_version < 90 || + sb->minor_version > 91) { printk(KERN_WARNING "Bad version number %d.%d on %s\n", sb->major_version, sb->minor_version, b); @@ -747,6 +748,20 @@ static int super_90_validate(mddev_t *mddev, mdk_rdev_t *rdev) mddev->bitmap_offset = 0; mddev->default_bitmap_offset = MD_SB_BYTES >> 9; + if (mddev->minor_version >= 91) { + mddev->reshape_position = sb->reshape_position; + mddev->delta_disks = sb->delta_disks; + mddev->new_level = sb->new_level; + mddev->new_layout = sb->new_layout; + mddev->new_chunk = sb->new_chunk; + } else { + mddev->reshape_position = MaxSector; + mddev->delta_disks = 0; + mddev->new_level = mddev->level; + mddev->new_layout = mddev->layout; + mddev->new_chunk = mddev->chunk_size; + } + if (sb->state & (1<<MD_SB_CLEAN)) mddev->recovery_cp = MaxSector; else { @@ -841,7 +856,6 @@ static void super_90_sync(mddev_t *mddev, mdk_rdev_t *rdev) sb->md_magic = MD_SB_MAGIC; sb->major_version = mddev->major_version; - sb->minor_version = mddev->minor_version; sb->patch_version = mddev->patch_version; sb->gvalid_words = 0; /* ignored */ memcpy(&sb->set_uuid0, mddev->uuid+0, 4); @@ -860,6 +874,17 @@ static void super_90_sync(mddev_t *mddev, mdk_rdev_t *rdev) sb->events_hi = (mddev->events>>32); sb->events_lo = (u32)mddev->events; + if (mddev->reshape_position == MaxSector) + sb->minor_version = 90; + else { + sb->minor_version = 91; + sb->reshape_position = mddev->reshape_position; + sb->new_level = mddev->new_level; + sb->delta_disks = mddev->delta_disks; + sb->new_layout = mddev->new_layout; + sb->new_chunk = mddev->new_chunk; + } + mddev->minor_version = sb->minor_version; if (mddev->in_sync) { sb->recovery_cp = mddev->recovery_cp; @@ -1104,6 +1129,20 @@ static int super_1_validate(mddev_t *mddev, mdk_rdev_t *rdev) } mddev->bitmap_offset = (__s32)le32_to_cpu(sb->bitmap_offset); } + if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { + mddev->reshape_position = le64_to_cpu(sb->reshape_position); + mddev->delta_disks = le32_to_cpu(sb->delta_disks); + mddev->new_level = le32_to_cpu(sb->new_level); + mddev->new_layout = le32_to_cpu(sb->new_layout); + mddev->new_chunk = le32_to_cpu(sb->new_chunk)<<9; + } else { + mddev->reshape_position = MaxSector; + mddev->delta_disks = 0; + mddev->new_level = mddev->level; + mddev->new_layout = mddev->layout; + mddev->new_chunk = mddev->chunk_size; + } + } else if (mddev->pers == NULL) { /* Insist of good event counter while assembling */ __u64 ev1 = le64_to_cpu(sb->events); @@ -1175,6 +1214,14 @@ static void super_1_sync(mddev_t *mddev, mdk_rdev_t *rdev) sb->bitmap_offset = cpu_to_le32((__u32)mddev->bitmap_offset); sb->feature_map = cpu_to_le32(MD_FEATURE_BITMAP_OFFSET); } + if (mddev->reshape_position != MaxSector) { + sb->feature_map |= cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE); + sb->reshape_position = cpu_to_le64(mddev->reshape_position); + sb->new_layout = cpu_to_le32(mddev->new_layout); + sb->delta_disks = cpu_to_le32(mddev->delta_disks); + sb->new_level = cpu_to_le32(mddev->new_level); + sb->new_chunk = cpu_to_le32(mddev->new_chunk>>9); + } max_dev = 0; ITERATE_RDEV(mddev,rdev2,tmp) @@ -1497,7 +1544,7 @@ static void sync_sbs(mddev_t * mddev) } } -static void md_update_sb(mddev_t * mddev) +void md_update_sb(mddev_t * mddev) { int err; struct list_head *tmp; @@ -1574,6 +1621,7 @@ repeat: wake_up(&mddev->sb_wait); } +EXPORT_SYMBOL_GPL(md_update_sb); /* words written to sysfs files may, or my not, be \n terminated. * We want to accept with case. For this we use cmd_match. @@ -2545,6 +2593,14 @@ static int do_md_run(mddev_t * mddev) mddev->level = pers->level; strlcpy(mddev->clevel, pers->name, sizeof(mddev->clevel)); + if (mddev->reshape_position != MaxSector && + pers->reshape == NULL) { + /* This personality cannot handle reshaping... */ + mddev->pers = NULL; + module_put(pers->owner); + return -EINVAL; + } + mddev->recovery = 0; mddev->resync_max_sectors = mddev->size << 1; /* may be over-ridden by personality */ mddev->barriers_work = 1; @@ -3433,11 +3489,18 @@ static int set_array_info(mddev_t * mddev, mdu_array_info_t *info) mddev->default_bitmap_offset = MD_SB_BYTES >> 9; mddev->bitmap_offset = 0; + mddev->reshape_position = MaxSector; + /* * Generate a 128 bit UUID */ get_random_bytes(mddev->uuid, 16); + mddev->new_level = mddev->level; + mddev->new_chunk = mddev->chunk_size; + mddev->new_layout = mddev->layout; + mddev->delta_disks = 0; + return 0; } |