btrfs: ref-verify: Use btrfs_ref to refactor btrfs_ref_tree_mod()
It's a perfect match for btrfs_ref_tree_mod() to use btrfs_ref, as
btrfs_ref describes a metadata/data reference update comprehensively.
Now we have one less function use confusing owner/level trick.
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
diff --git a/fs/btrfs/ref-verify.c b/fs/btrfs/ref-verify.c
index d09b6cd..4a0f628 100644
--- a/fs/btrfs/ref-verify.c
+++ b/fs/btrfs/ref-verify.c
@@ -670,36 +670,43 @@ static void dump_block_entry(struct btrfs_fs_info *fs_info,
/*
* btrfs_ref_tree_mod: called when we modify a ref for a bytenr
- * @root: the root we are making this modification from.
- * @bytenr: the bytenr we are modifying.
- * @num_bytes: number of bytes.
- * @parent: the parent bytenr.
- * @ref_root: the original root owner of the bytenr.
- * @owner: level in the case of metadata, inode in the case of data.
- * @offset: 0 for metadata, file offset for data.
- * @action: the action that we are doing, this is the same as the delayed ref
- * action.
*
* This will add an action item to the given bytenr and do sanity checks to make
* sure we haven't messed something up. If we are making a new allocation and
* this block entry has history we will delete all previous actions as long as
* our sanity checks pass as they are no longer needed.
*/
-int btrfs_ref_tree_mod(struct btrfs_root *root, u64 bytenr, u64 num_bytes,
- u64 parent, u64 ref_root, u64 owner, u64 offset,
- int action)
+int btrfs_ref_tree_mod(struct btrfs_fs_info *fs_info,
+ struct btrfs_ref *generic_ref)
{
- struct btrfs_fs_info *fs_info = root->fs_info;
struct ref_entry *ref = NULL, *exist;
struct ref_action *ra = NULL;
struct block_entry *be = NULL;
struct root_entry *re = NULL;
+ int action = generic_ref->action;
int ret = 0;
- bool metadata = owner < BTRFS_FIRST_FREE_OBJECTID;
+ bool metadata;
+ u64 bytenr = generic_ref->bytenr;
+ u64 num_bytes = generic_ref->len;
+ u64 parent = generic_ref->parent;
+ u64 ref_root;
+ u64 owner;
+ u64 offset;
- if (!btrfs_test_opt(root->fs_info, REF_VERIFY))
+ if (!btrfs_test_opt(fs_info, REF_VERIFY))
return 0;
+ if (generic_ref->type == BTRFS_REF_METADATA) {
+ ref_root = generic_ref->tree_ref.root;
+ owner = generic_ref->tree_ref.level;
+ offset = 0;
+ } else {
+ ref_root = generic_ref->data_ref.ref_root;
+ owner = generic_ref->data_ref.ino;
+ offset = generic_ref->data_ref.offset;
+ }
+ metadata = owner < BTRFS_FIRST_FREE_OBJECTID;
+
ref = kzalloc(sizeof(struct ref_entry), GFP_NOFS);
ra = kmalloc(sizeof(struct ref_action), GFP_NOFS);
if (!ra || !ref) {
@@ -732,7 +739,7 @@ int btrfs_ref_tree_mod(struct btrfs_root *root, u64 bytenr, u64 num_bytes,
INIT_LIST_HEAD(&ra->list);
ra->action = action;
- ra->root = root->root_key.objectid;
+ ra->root = generic_ref->real_root;
/*
* This is an allocation, preallocate the block_entry in case we haven't
@@ -745,7 +752,7 @@ int btrfs_ref_tree_mod(struct btrfs_root *root, u64 bytenr, u64 num_bytes,
* is and the new root objectid, so let's not treat the passed
* in root as if it really has a ref for this bytenr.
*/
- be = add_block_entry(root->fs_info, bytenr, num_bytes, ref_root);
+ be = add_block_entry(fs_info, bytenr, num_bytes, ref_root);
if (IS_ERR(be)) {
kfree(ra);
ret = PTR_ERR(be);
@@ -787,13 +794,13 @@ int btrfs_ref_tree_mod(struct btrfs_root *root, u64 bytenr, u64 num_bytes,
* one we want to lookup below when we modify the
* re->num_refs.
*/
- ref_root = root->root_key.objectid;
- re->root_objectid = root->root_key.objectid;
+ ref_root = generic_ref->real_root;
+ re->root_objectid = generic_ref->real_root;
re->num_refs = 0;
}
- spin_lock(&root->fs_info->ref_verify_lock);
- be = lookup_block_entry(&root->fs_info->block_tree, bytenr);
+ spin_lock(&fs_info->ref_verify_lock);
+ be = lookup_block_entry(&fs_info->block_tree, bytenr);
if (!be) {
btrfs_err(fs_info,
"trying to do action %d to bytenr %llu num_bytes %llu but there is no existing entry!",
@@ -862,7 +869,7 @@ int btrfs_ref_tree_mod(struct btrfs_root *root, u64 bytenr, u64 num_bytes,
* didn't think of some other corner case.
*/
btrfs_err(fs_info, "failed to find root %llu for %llu",
- root->root_key.objectid, be->bytenr);
+ generic_ref->real_root, be->bytenr);
dump_block_entry(fs_info, be);
dump_ref_action(fs_info, ra);
kfree(ra);
@@ -881,7 +888,7 @@ int btrfs_ref_tree_mod(struct btrfs_root *root, u64 bytenr, u64 num_bytes,
list_add_tail(&ra->list, &be->actions);
ret = 0;
out_unlock:
- spin_unlock(&root->fs_info->ref_verify_lock);
+ spin_unlock(&fs_info->ref_verify_lock);
out:
if (ret)
btrfs_clear_opt(fs_info->mount_opt, REF_VERIFY);
