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-rw-r--r--fs/btrfs/block-group.c28
-rw-r--r--fs/btrfs/block-group.h1
-rw-r--r--fs/btrfs/ctree.h2
-rw-r--r--fs/btrfs/disk-io.c50
-rw-r--r--fs/btrfs/free-space-tree.c2
-rw-r--r--fs/btrfs/transaction.c15
-rw-r--r--fs/btrfs/tree-checker.c21
7 files changed, 106 insertions, 13 deletions
diff --git a/fs/btrfs/block-group.c b/fs/btrfs/block-group.c
index 8202ad6aa131..3113f6d7f335 100644
--- a/fs/btrfs/block-group.c
+++ b/fs/btrfs/block-group.c
@@ -2006,6 +2006,7 @@ static int read_one_block_group(struct btrfs_fs_info *info,
cache->length = key->offset;
cache->used = btrfs_stack_block_group_used(bgi);
cache->flags = btrfs_stack_block_group_flags(bgi);
+ cache->global_root_id = btrfs_stack_block_group_chunk_objectid(bgi);
set_free_space_tree_thresholds(cache);
@@ -2288,7 +2289,7 @@ static int insert_block_group_item(struct btrfs_trans_handle *trans,
spin_lock(&block_group->lock);
btrfs_set_stack_block_group_used(&bgi, block_group->used);
btrfs_set_stack_block_group_chunk_objectid(&bgi,
- BTRFS_FIRST_CHUNK_TREE_OBJECTID);
+ block_group->global_root_id);
btrfs_set_stack_block_group_flags(&bgi, block_group->flags);
key.objectid = block_group->start;
key.type = BTRFS_BLOCK_GROUP_ITEM_KEY;
@@ -2444,6 +2445,27 @@ next:
btrfs_trans_release_chunk_metadata(trans);
}
+/*
+ * For extent tree v2 we use the block_group_item->chunk_offset to point at our
+ * global root id. For v1 it's always set to BTRFS_FIRST_CHUNK_TREE_OBJECTID.
+ */
+static u64 calculate_global_root_id(struct btrfs_fs_info *fs_info, u64 offset)
+{
+ u64 div = SZ_1G;
+ u64 index;
+
+ if (!btrfs_fs_incompat(fs_info, EXTENT_TREE_V2))
+ return BTRFS_FIRST_CHUNK_TREE_OBJECTID;
+
+ /* If we have a smaller fs index based on 128MiB. */
+ if (btrfs_super_total_bytes(fs_info->super_copy) <= (SZ_1G * 10ULL))
+ div = SZ_128M;
+
+ offset = div64_u64(offset, div);
+ div64_u64_rem(offset, fs_info->nr_global_roots, &index);
+ return index;
+}
+
struct btrfs_block_group *btrfs_make_block_group(struct btrfs_trans_handle *trans,
u64 bytes_used, u64 type,
u64 chunk_offset, u64 size)
@@ -2464,6 +2486,8 @@ struct btrfs_block_group *btrfs_make_block_group(struct btrfs_trans_handle *tran
cache->flags = type;
cache->last_byte_to_unpin = (u64)-1;
cache->cached = BTRFS_CACHE_FINISHED;
+ cache->global_root_id = calculate_global_root_id(fs_info, cache->start);
+
if (btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE))
cache->needs_free_space = 1;
@@ -2693,7 +2717,7 @@ static int update_block_group_item(struct btrfs_trans_handle *trans,
bi = btrfs_item_ptr_offset(leaf, path->slots[0]);
btrfs_set_stack_block_group_used(&bgi, cache->used);
btrfs_set_stack_block_group_chunk_objectid(&bgi,
- BTRFS_FIRST_CHUNK_TREE_OBJECTID);
+ cache->global_root_id);
btrfs_set_stack_block_group_flags(&bgi, cache->flags);
write_extent_buffer(leaf, &bgi, bi, sizeof(bgi));
btrfs_mark_buffer_dirty(leaf);
diff --git a/fs/btrfs/block-group.h b/fs/btrfs/block-group.h
index 5878b7ce3b78..93aabc68bb6a 100644
--- a/fs/btrfs/block-group.h
+++ b/fs/btrfs/block-group.h
@@ -68,6 +68,7 @@ struct btrfs_block_group {
u64 bytes_super;
u64 flags;
u64 cache_generation;
+ u64 global_root_id;
/*
* If the free space extent count exceeds this number, convert the block
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index f460a7bb9ae8..54513c4e891a 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -1058,6 +1058,8 @@ struct btrfs_fs_info {
spinlock_t relocation_bg_lock;
u64 data_reloc_bg;
+ u64 nr_global_roots;
+
spinlock_t zone_active_bgs_lock;
struct list_head zone_active_bgs;
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index fe1349737edb..ed62e81c0b66 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1289,12 +1289,33 @@ struct btrfs_root *btrfs_global_root(struct btrfs_fs_info *fs_info,
return root;
}
+static u64 btrfs_global_root_id(struct btrfs_fs_info *fs_info, u64 bytenr)
+{
+ struct btrfs_block_group *block_group;
+ u64 ret;
+
+ if (!btrfs_fs_incompat(fs_info, EXTENT_TREE_V2))
+ return 0;
+
+ if (bytenr)
+ block_group = btrfs_lookup_block_group(fs_info, bytenr);
+ else
+ block_group = btrfs_lookup_first_block_group(fs_info, bytenr);
+ ASSERT(block_group);
+ if (!block_group)
+ return 0;
+ ret = block_group->global_root_id;
+ btrfs_put_block_group(block_group);
+
+ return ret;
+}
+
struct btrfs_root *btrfs_csum_root(struct btrfs_fs_info *fs_info, u64 bytenr)
{
struct btrfs_key key = {
.objectid = BTRFS_CSUM_TREE_OBJECTID,
.type = BTRFS_ROOT_ITEM_KEY,
- .offset = 0,
+ .offset = btrfs_global_root_id(fs_info, bytenr),
};
return btrfs_global_root(fs_info, &key);
@@ -1305,7 +1326,7 @@ struct btrfs_root *btrfs_extent_root(struct btrfs_fs_info *fs_info, u64 bytenr)
struct btrfs_key key = {
.objectid = BTRFS_EXTENT_TREE_OBJECTID,
.type = BTRFS_ROOT_ITEM_KEY,
- .offset = 0,
+ .offset = btrfs_global_root_id(fs_info, bytenr),
};
return btrfs_global_root(fs_info, &key);
@@ -2096,7 +2117,6 @@ static void backup_super_roots(struct btrfs_fs_info *info)
{
const int next_backup = info->backup_root_index;
struct btrfs_root_backup *root_backup;
- struct btrfs_root *csum_root = btrfs_csum_root(info, 0);
root_backup = info->super_for_commit->super_roots + next_backup;
@@ -2130,6 +2150,7 @@ static void backup_super_roots(struct btrfs_fs_info *info)
btrfs_header_level(info->block_group_root->node));
} else {
struct btrfs_root *extent_root = btrfs_extent_root(info, 0);
+ struct btrfs_root *csum_root = btrfs_csum_root(info, 0);
btrfs_set_backup_extent_root(root_backup,
extent_root->node->start);
@@ -2137,6 +2158,12 @@ static void backup_super_roots(struct btrfs_fs_info *info)
btrfs_header_generation(extent_root->node));
btrfs_set_backup_extent_root_level(root_backup,
btrfs_header_level(extent_root->node));
+
+ btrfs_set_backup_csum_root(root_backup, csum_root->node->start);
+ btrfs_set_backup_csum_root_gen(root_backup,
+ btrfs_header_generation(csum_root->node));
+ btrfs_set_backup_csum_root_level(root_backup,
+ btrfs_header_level(csum_root->node));
}
/*
@@ -2158,12 +2185,6 @@ static void backup_super_roots(struct btrfs_fs_info *info)
btrfs_set_backup_dev_root_level(root_backup,
btrfs_header_level(info->dev_root->node));
- btrfs_set_backup_csum_root(root_backup, csum_root->node->start);
- btrfs_set_backup_csum_root_gen(root_backup,
- btrfs_header_generation(csum_root->node));
- btrfs_set_backup_csum_root_level(root_backup,
- btrfs_header_level(csum_root->node));
-
btrfs_set_backup_total_bytes(root_backup,
btrfs_super_total_bytes(info->super_copy));
btrfs_set_backup_bytes_used(root_backup,
@@ -2546,6 +2567,7 @@ static int load_global_roots_objectid(struct btrfs_root *tree_root,
{
struct btrfs_fs_info *fs_info = tree_root->fs_info;
struct btrfs_root *root;
+ u64 max_global_id = 0;
int ret;
struct btrfs_key key = {
.objectid = objectid,
@@ -2581,6 +2603,13 @@ static int load_global_roots_objectid(struct btrfs_root *tree_root,
break;
btrfs_release_path(path);
+ /*
+ * Just worry about this for extent tree, it'll be the same for
+ * everybody.
+ */
+ if (objectid == BTRFS_EXTENT_TREE_OBJECTID)
+ max_global_id = max(max_global_id, key.offset);
+
found = true;
root = read_tree_root_path(tree_root, path, &key);
if (IS_ERR(root)) {
@@ -2598,6 +2627,9 @@ static int load_global_roots_objectid(struct btrfs_root *tree_root,
}
btrfs_release_path(path);
+ if (objectid == BTRFS_EXTENT_TREE_OBJECTID)
+ fs_info->nr_global_roots = max_global_id + 1;
+
if (!found || ret) {
if (objectid == BTRFS_CSUM_TREE_OBJECTID)
set_bit(BTRFS_FS_STATE_NO_CSUMS, &fs_info->fs_state);
diff --git a/fs/btrfs/free-space-tree.c b/fs/btrfs/free-space-tree.c
index 655aad0f9e1c..0ae54d8c10d6 100644
--- a/fs/btrfs/free-space-tree.c
+++ b/fs/btrfs/free-space-tree.c
@@ -25,6 +25,8 @@ static struct btrfs_root *btrfs_free_space_root(
.offset = 0,
};
+ if (btrfs_fs_incompat(block_group->fs_info, EXTENT_TREE_V2))
+ key.offset = block_group->global_root_id;
return btrfs_global_root(block_group->fs_info, &key);
}
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index 1f1c25db6f6b..37f6ec2a3c56 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -1911,6 +1911,14 @@ 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)
@@ -2362,6 +2370,13 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans)
list_add_tail(&fs_info->chunk_root->dirty_list,
&cur_trans->switch_commits);
+ if (btrfs_fs_incompat(fs_info, EXTENT_TREE_V2)) {
+ btrfs_set_root_node(&fs_info->block_group_root->root_item,
+ fs_info->block_group_root->node);
+ list_add_tail(&fs_info->block_group_root->dirty_list,
+ &cur_trans->switch_commits);
+ }
+
switch_commit_roots(trans);
ASSERT(list_empty(&cur_trans->dirty_bgs));
diff --git a/fs/btrfs/tree-checker.c b/fs/btrfs/tree-checker.c
index 64c7d2a2bb3e..e56c0107eea3 100644
--- a/fs/btrfs/tree-checker.c
+++ b/fs/btrfs/tree-checker.c
@@ -639,8 +639,10 @@ static void block_group_err(const struct extent_buffer *eb, int slot,
static int check_block_group_item(struct extent_buffer *leaf,
struct btrfs_key *key, int slot)
{
+ struct btrfs_fs_info *fs_info = leaf->fs_info;
struct btrfs_block_group_item bgi;
u32 item_size = btrfs_item_size(leaf, slot);
+ u64 chunk_objectid;
u64 flags;
u64 type;
@@ -663,8 +665,23 @@ static int check_block_group_item(struct extent_buffer *leaf,
read_extent_buffer(leaf, &bgi, btrfs_item_ptr_offset(leaf, slot),
sizeof(bgi));
- if (unlikely(btrfs_stack_block_group_chunk_objectid(&bgi) !=
- BTRFS_FIRST_CHUNK_TREE_OBJECTID)) {
+ chunk_objectid = btrfs_stack_block_group_chunk_objectid(&bgi);
+ if (btrfs_fs_incompat(fs_info, EXTENT_TREE_V2)) {
+ /*
+ * We don't init the nr_global_roots until we load the global
+ * roots, so this could be 0 at mount time. If it's 0 we'll
+ * just assume we're fine, and later we'll check against our
+ * actual value.
+ */
+ if (unlikely(fs_info->nr_global_roots &&
+ chunk_objectid >= fs_info->nr_global_roots)) {
+ block_group_err(leaf, slot,
+ "invalid block group global root id, have %llu, needs to be <= %llu",
+ chunk_objectid,
+ fs_info->nr_global_roots);
+ return -EUCLEAN;
+ }
+ } else if (unlikely(chunk_objectid != BTRFS_FIRST_CHUNK_TREE_OBJECTID)) {
block_group_err(leaf, slot,
"invalid block group chunk objectid, have %llu expect %llu",
btrfs_stack_block_group_chunk_objectid(&bgi),
generated by cgit (git 2.34.1) at 2024-07-06 17:37:12 +0000