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authorNikolay Borisov <nborisov@suse.com>2018-05-21 12:27:23 +0300
committerDavid Sterba <dsterba@suse.com>2018-05-29 18:12:57 +0200
commitd4b20733d203eea307986bd0502ba8d54afc2891 (patch)
treeadd57f9abc7c662f8cf158698bf43bd40eeeb3af /fs/btrfs
parent21ebfbe7e06cafb05c41cc39b058be35acb6c5da (diff)
downloadlinux-d4b20733d203eea307986bd0502ba8d54afc2891.tar.bz2
btrfs: Streamline shared ref check in alloc_reserved_tree_block
Instead of setting "parent" to ref->parent only when dealing with a shared ref and subsequently performing another check to see if (parent > 0), check the "node->type" directly and act accordingly. This makes the code more streamline. No functional changes. Signed-off-by: Nikolay Borisov <nborisov@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs')
-rw-r--r--fs/btrfs/extent-tree.c10
1 files changed, 2 insertions, 8 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 1e666961f0e4..c25308722e81 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -8143,17 +8143,11 @@ static int alloc_reserved_tree_block(struct btrfs_trans_handle *trans,
struct btrfs_delayed_tree_ref *ref;
u32 size = sizeof(*extent_item) + sizeof(*iref);
u64 num_bytes;
- u64 parent;
u64 flags = extent_op->flags_to_set;
bool skinny_metadata = btrfs_fs_incompat(fs_info, SKINNY_METADATA);
ref = btrfs_delayed_node_to_tree_ref(node);
- if (node->type == BTRFS_SHARED_BLOCK_REF_KEY)
- parent = ref->parent;
- else
- parent = 0;
-
extent_key.objectid = node->bytenr;
if (skinny_metadata) {
extent_key.offset = ref->level;
@@ -8202,11 +8196,11 @@ static int alloc_reserved_tree_block(struct btrfs_trans_handle *trans,
iref = (struct btrfs_extent_inline_ref *)(block_info + 1);
}
- if (parent > 0) {
+ if (node->type == BTRFS_SHARED_BLOCK_REF_KEY) {
BUG_ON(!(flags & BTRFS_BLOCK_FLAG_FULL_BACKREF));
btrfs_set_extent_inline_ref_type(leaf, iref,
BTRFS_SHARED_BLOCK_REF_KEY);
- btrfs_set_extent_inline_ref_offset(leaf, iref, parent);
+ btrfs_set_extent_inline_ref_offset(leaf, iref, ref->parent);
} else {
btrfs_set_extent_inline_ref_type(leaf, iref,
BTRFS_TREE_BLOCK_REF_KEY);