[25/26] btrfs-progs: init new tree blocks in btrfs_alloc_tree_block

Commit Message

Josef Bacik April 29, 2023, 8:19 p.m. UTC

This is how the kernel initializes blocks, so anybody who uses
btrfs_alloc_tree_block in the kernel expects the blocks to be already
initialized.  Put this init code into btrfs-progs so as we sync code
from the kernel we get the correct behavior.

Signed-off-by: Josef Bacik <[e-mail]>
---
 kernel-shared/extent-tree.c | 9 +++++++++
 1 file changed, 9 insertions(+)

Patch

diff --git a/kernel-shared/extent-tree.c b/kernel-shared/extent-tree.c
index e29a1cb4..6da30011 100644
--- a/kernel-shared/extent-tree.c
+++ b/kernel-shared/extent-tree.c
@@ -2559,6 +2559,7 @@  struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
 					u64 hint, u64 empty_size,
 					enum btrfs_lock_nesting nest)
 {
+	struct btrfs_fs_info *fs_info = trans->fs_info;
 	struct btrfs_key ins;
 	int ret;
 	struct extent_buffer *buf;
@@ -2579,6 +2580,14 @@  struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
 		return ERR_PTR(-ENOMEM);
 	}
 	btrfs_set_buffer_uptodate(buf);
+	memset_extent_buffer(buf, 0, 0, sizeof(struct btrfs_header));
+	btrfs_set_header_level(buf, level);
+	btrfs_set_header_bytenr(buf, buf->start);
+	btrfs_set_header_generation(buf, trans->transid);
+	btrfs_set_header_backref_rev(buf, BTRFS_MIXED_BACKREF_REV);
+	btrfs_set_header_owner(buf, root_objectid);
+	write_extent_buffer_fsid(buf, fs_info->fs_devices->metadata_uuid);
+	write_extent_buffer_chunk_tree_uuid(buf, fs_info->chunk_tree_uuid);
 	trans->blocks_used++;
 
 	return buf;