diff options
| -rw-r--r-- | volumes.c | 52 | ||||
| -rw-r--r-- | volumes.h | 1 |
2 files changed, 53 insertions, 0 deletions
@@ -2425,3 +2425,55 @@ err: btrfs_release_path(&path); return ret; } + +/* + * Return 0 if super block total_bytes matches all devices' total_bytes + * Return >0 if super block total_bytes mismatch but fixed without problem + * Return <0 if we failed to fix super block total_bytes + */ +int btrfs_fix_super_size(struct btrfs_fs_info *fs_info) +{ + struct btrfs_trans_handle *trans; + struct btrfs_device *device; + struct list_head *dev_list = &fs_info->fs_devices->devices; + u64 total_bytes = 0; + u64 old_bytes = btrfs_super_total_bytes(fs_info->super_copy); + int ret; + + list_for_each_entry(device, dev_list, dev_list) { + /* + * Caller should ensure this function is called after aligning + * all devices' total_bytes. + */ + if (!IS_ALIGNED(device->total_bytes, fs_info->sectorsize)) { + error("device %llu total_bytes %llu not aligned to %u", + device->devid, device->total_bytes, + fs_info->sectorsize); + return -EUCLEAN; + } + total_bytes += device->total_bytes; + } + + if (total_bytes == old_bytes) + return 0; + + btrfs_set_super_total_bytes(fs_info->super_copy, total_bytes); + + /* Commit transaction to update all super blocks */ + trans = btrfs_start_transaction(fs_info->tree_root, 1); + if (IS_ERR(trans)) { + ret = PTR_ERR(trans); + error("error starting transaction: %d (%s)", + ret, strerror(-ret)); + return ret; + } + ret = btrfs_commit_transaction(trans, fs_info->tree_root); + if (ret < 0) { + error("failed to commit current transaction: %d (%s)", + ret, strerror(-ret)); + return ret; + } + printf("Fixed super total bytes, old size: %llu new size: %llu\n", + old_bytes, total_bytes); + return 1; +} @@ -247,4 +247,5 @@ u64 btrfs_stripe_length(struct btrfs_fs_info *fs_info, struct btrfs_chunk *chunk); int btrfs_fix_device_size(struct btrfs_fs_info *fs_info, struct btrfs_device *device); +int btrfs_fix_super_size(struct btrfs_fs_info *fs_info); #endif |