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https://github.com/kdave/btrfs-progs
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btrfs-progs: read fs with stripe tree from disk
When encountering a filesystem formatted with the raid stripe tree feature, read it from disk. Also add the incompat declaration to the tree printer. Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Signed-off-by: David Sterba <dsterba@suse.com>
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@ -306,6 +306,7 @@ struct btrfs_fs_info {
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struct btrfs_root *quota_root;
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struct btrfs_root *uuid_root;
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struct btrfs_root *block_group_root;
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struct btrfs_root *stripe_root;
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struct rb_root global_roots_tree;
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struct rb_root fs_root_tree;
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@ -790,6 +790,9 @@ struct btrfs_root *btrfs_read_fs_root(struct btrfs_fs_info *fs_info,
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return fs_info->block_group_root ? fs_info->block_group_root :
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ERR_PTR(-ENOENT);
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if (location->objectid == BTRFS_RAID_STRIPE_TREE_OBJECTID)
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return fs_info->stripe_root ? fs_info->stripe_root : ERR_PTR(-ENOENT);
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BUG_ON(location->objectid == BTRFS_TREE_RELOC_OBJECTID);
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node = rb_search(&fs_info->fs_root_tree, (void *)&objectid,
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@ -822,6 +825,9 @@ void btrfs_free_fs_info(struct btrfs_fs_info *fs_info)
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if (fs_info->quota_root)
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free(fs_info->quota_root);
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if (fs_info->stripe_root)
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free(fs_info->stripe_root);
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free_global_roots_tree(&fs_info->global_roots_tree);
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free(fs_info->tree_root);
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free(fs_info->chunk_root);
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@ -846,12 +852,14 @@ struct btrfs_fs_info *btrfs_new_fs_info(int writable, u64 sb_bytenr)
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fs_info->dev_root = calloc(1, sizeof(struct btrfs_root));
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fs_info->quota_root = calloc(1, sizeof(struct btrfs_root));
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fs_info->uuid_root = calloc(1, sizeof(struct btrfs_root));
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fs_info->stripe_root = calloc(1, sizeof(struct btrfs_root));
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fs_info->block_group_root = calloc(1, sizeof(struct btrfs_root));
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fs_info->super_copy = calloc(1, BTRFS_SUPER_INFO_SIZE);
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if (!fs_info->tree_root || !fs_info->chunk_root || !fs_info->dev_root ||
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!fs_info->quota_root || !fs_info->uuid_root ||
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!fs_info->block_group_root || !fs_info->super_copy)
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!fs_info->block_group_root || !fs_info->super_copy ||
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!fs_info->stripe_root)
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goto free_all;
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extent_buffer_init_cache(fs_info);
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@ -1260,6 +1268,20 @@ int btrfs_setup_all_roots(struct btrfs_fs_info *fs_info, u64 root_tree_bytenr,
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return -EIO;
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}
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#if EXPERIMENTAL
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if (btrfs_fs_incompat(fs_info, RAID_STRIPE_TREE)) {
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ret = btrfs_find_and_setup_root(root, fs_info,
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BTRFS_RAID_STRIPE_TREE_OBJECTID,
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fs_info->stripe_root);
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if (ret) {
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free(fs_info->stripe_root);
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fs_info->stripe_root = NULL;
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} else {
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set_bit(BTRFS_ROOT_TRACK_DIRTY, &fs_info->stripe_root->state);
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}
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}
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#endif
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if (maybe_load_block_groups(fs_info, flags)) {
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ret = btrfs_read_block_groups(fs_info);
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/*
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@ -1317,6 +1339,8 @@ void btrfs_release_all_roots(struct btrfs_fs_info *fs_info)
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free_extent_buffer(fs_info->chunk_root->node);
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if (fs_info->uuid_root)
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free_extent_buffer(fs_info->uuid_root->node);
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if (fs_info->stripe_root)
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free_extent_buffer(fs_info->stripe_root->node);
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}
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static void free_map_lookup(struct cache_extent *ce)
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@ -1708,6 +1708,7 @@ static struct readable_flag_entry incompat_flags_array[] = {
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DEF_INCOMPAT_FLAG_ENTRY(RAID1C34),
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DEF_INCOMPAT_FLAG_ENTRY(ZONED),
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DEF_INCOMPAT_FLAG_ENTRY(EXTENT_TREE_V2),
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DEF_INCOMPAT_FLAG_ENTRY(RAID_STRIPE_TREE),
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};
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static const int incompat_flags_num = sizeof(incompat_flags_array) /
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sizeof(struct readable_flag_entry);
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@ -356,6 +356,7 @@ _static_assert(sizeof(struct btrfs_ioctl_fs_info_args) == 1024);
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#define BTRFS_FEATURE_INCOMPAT_RAID1C34 (1ULL << 11)
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#define BTRFS_FEATURE_INCOMPAT_ZONED (1ULL << 12)
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#define BTRFS_FEATURE_INCOMPAT_EXTENT_TREE_V2 (1ULL << 13)
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#define BTRFS_FEATURE_INCOMPAT_RAID_STRIPE_TREE (1ULL << 14)
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struct btrfs_ioctl_feature_flags {
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__u64 compat_flags;
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@ -73,6 +73,9 @@
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/* Holds the block group items for extent tree v2. */
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#define BTRFS_BLOCK_GROUP_TREE_OBJECTID 11ULL
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/* Holds raid stripe entries */
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#define BTRFS_RAID_STRIPE_TREE_OBJECTID 12ULL
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/* device stats in the device tree */
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#define BTRFS_DEV_STATS_OBJECTID 0ULL
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