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-rw-r--r--fs/btrfs/block-rsv.c1
-rw-r--r--fs/btrfs/ctree.h27
-rw-r--r--fs/btrfs/disk-io.c40
-rw-r--r--fs/btrfs/transaction.c8
4 files changed, 23 insertions, 53 deletions
diff --git a/fs/btrfs/block-rsv.c b/fs/btrfs/block-rsv.c
index 06be0644dd37..6ce704d3bdd2 100644
--- a/fs/btrfs/block-rsv.c
+++ b/fs/btrfs/block-rsv.c
@@ -424,6 +424,7 @@ void btrfs_init_root_block_rsv(struct btrfs_root *root)
case BTRFS_CSUM_TREE_OBJECTID:
case BTRFS_EXTENT_TREE_OBJECTID:
case BTRFS_FREE_SPACE_TREE_OBJECTID:
+ case BTRFS_BLOCK_GROUP_TREE_OBJECTID:
root->block_rsv = &fs_info->delayed_refs_rsv;
break;
case BTRFS_ROOT_TREE_OBJECTID:
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index b38cd6e2eb5d..2c38daa822ef 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -280,14 +280,9 @@ struct btrfs_super_block {
/* the UUID written into btree blocks */
u8 metadata_uuid[BTRFS_FSID_SIZE];
- /* Extent tree v2 */
- __le64 block_group_root;
- __le64 block_group_root_generation;
- u8 block_group_root_level;
-
/* future expansion */
- u8 reserved8[7];
- __le64 reserved[25];
+ u8 reserved8[8];
+ __le64 reserved[27];
u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
@@ -2477,17 +2472,6 @@ BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
num_devices, 64);
-/*
- * For extent tree v2 we overload the extent root with the block group root, as
- * we will have multiple extent roots.
- */
-BTRFS_SETGET_STACK_FUNCS(backup_block_group_root, struct btrfs_root_backup,
- extent_root, 64);
-BTRFS_SETGET_STACK_FUNCS(backup_block_group_root_gen, struct btrfs_root_backup,
- extent_root_gen, 64);
-BTRFS_SETGET_STACK_FUNCS(backup_block_group_root_level,
- struct btrfs_root_backup, extent_root_level, 8);
-
/* struct btrfs_balance_item */
BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
@@ -2620,13 +2604,6 @@ BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
uuid_tree_generation, 64);
-BTRFS_SETGET_STACK_FUNCS(super_block_group_root, struct btrfs_super_block,
- block_group_root, 64);
-BTRFS_SETGET_STACK_FUNCS(super_block_group_root_generation,
- struct btrfs_super_block,
- block_group_root_generation, 64);
-BTRFS_SETGET_STACK_FUNCS(super_block_group_root_level, struct btrfs_super_block,
- block_group_root_level, 8);
int btrfs_super_csum_size(const struct btrfs_super_block *s);
const char *btrfs_super_csum_name(u16 csum_type);
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index bb87b5697aff..dfc9b3aea76a 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1522,6 +1522,9 @@ static struct btrfs_root *btrfs_get_global_root(struct btrfs_fs_info *fs_info,
if (objectid == BTRFS_UUID_TREE_OBJECTID)
return btrfs_grab_root(fs_info->uuid_root) ?
fs_info->uuid_root : ERR_PTR(-ENOENT);
+ if (objectid == BTRFS_BLOCK_GROUP_TREE_OBJECTID)
+ return btrfs_grab_root(fs_info->block_group_root) ?
+ fs_info->block_group_root : ERR_PTR(-ENOENT);
if (objectid == BTRFS_FREE_SPACE_TREE_OBJECTID) {
struct btrfs_root *root = btrfs_global_root(fs_info, &key);
@@ -1978,14 +1981,7 @@ static void backup_super_roots(struct btrfs_fs_info *info)
btrfs_set_backup_chunk_root_level(root_backup,
btrfs_header_level(info->chunk_root->node));
- if (btrfs_fs_incompat(info, EXTENT_TREE_V2)) {
- btrfs_set_backup_block_group_root(root_backup,
- info->block_group_root->node->start);
- btrfs_set_backup_block_group_root_gen(root_backup,
- btrfs_header_generation(info->block_group_root->node));
- btrfs_set_backup_block_group_root_level(root_backup,
- btrfs_header_level(info->block_group_root->node));
- } else {
+ if (!btrfs_fs_incompat(info, EXTENT_TREE_V2)) {
struct btrfs_root *extent_root = btrfs_extent_root(info, 0);
struct btrfs_root *csum_root = btrfs_csum_root(info, 0);
@@ -2527,10 +2523,24 @@ static int btrfs_read_roots(struct btrfs_fs_info *fs_info)
if (ret)
return ret;
- location.objectid = BTRFS_DEV_TREE_OBJECTID;
location.type = BTRFS_ROOT_ITEM_KEY;
location.offset = 0;
+ if (btrfs_fs_incompat(fs_info, EXTENT_TREE_V2)) {
+ location.objectid = BTRFS_BLOCK_GROUP_TREE_OBJECTID;
+ root = btrfs_read_tree_root(tree_root, &location);
+ if (IS_ERR(root)) {
+ if (!btrfs_test_opt(fs_info, IGNOREBADROOTS)) {
+ ret = PTR_ERR(root);
+ goto out;
+ }
+ } else {
+ set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state);
+ fs_info->block_group_root = root;
+ }
+ }
+
+ location.objectid = BTRFS_DEV_TREE_OBJECTID;
root = btrfs_read_tree_root(tree_root, &location);
if (IS_ERR(root)) {
if (!btrfs_test_opt(fs_info, IGNOREBADROOTS)) {
@@ -2858,17 +2868,7 @@ static int load_important_roots(struct btrfs_fs_info *fs_info)
btrfs_warn(fs_info, "couldn't read tree root");
return ret;
}
-
- if (!btrfs_fs_incompat(fs_info, EXTENT_TREE_V2))
- return 0;
-
- bytenr = btrfs_super_block_group_root(sb);
- gen = btrfs_super_block_group_root_generation(sb);
- level = btrfs_super_block_group_root_level(sb);
- ret = load_super_root(fs_info->block_group_root, bytenr, gen, level);
- if (ret)
- btrfs_warn(fs_info, "couldn't read block group root");
- return ret;
+ return 0;
}
static int __cold init_tree_roots(struct btrfs_fs_info *fs_info)
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index 4c87bf2abc14..d9e608935e64 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -1894,14 +1894,6 @@ static void update_super_roots(struct btrfs_fs_info *fs_info)
super->cache_generation = 0;
if (test_bit(BTRFS_FS_UPDATE_UUID_TREE_GEN, &fs_info->flags))
super->uuid_tree_generation = root_item->generation;
-
- if (btrfs_fs_incompat(fs_info, EXTENT_TREE_V2)) {
- root_item = &fs_info->block_group_root->root_item;
-
- super->block_group_root = root_item->bytenr;
- super->block_group_root_generation = root_item->generation;
- super->block_group_root_level = root_item->level;
- }
}
int btrfs_transaction_in_commit(struct btrfs_fs_info *info)
generated by cgit v1.2.3 (git 2.39.1) at 2025-03-19 10:10:44 +0000