path: root/fs/btrfs/ctree.h
diff options
authorJosef Bacik <josef@toxicpanda.com>2019-08-22 15:14:33 -0400
committerDavid Sterba <dsterba@suse.com>2019-09-09 14:59:13 +0200
commit2bd36e7b4fd60d4ff5f9ba6a0ad84557ae4803c4 (patch)
tree092a2fb134a8cb3387df0bde272d631aa8fd3e21 /fs/btrfs/ctree.h
parentbtrfs: tree-checker: Add EXTENT_DATA_REF check (diff)
btrfs: rename the btrfs_calc_*_metadata_size helpers
btrfs_calc_trunc_metadata_size differs from trans_metadata_size in that it doesn't take into account any splitting at the levels, because truncate will never split nodes. However truncate _and_ changing will never split nodes, so rename btrfs_calc_trunc_metadata_size to btrfs_calc_metadata_size. Also btrfs_calc_trans_metadata_size is purely for inserting items, so rename this to btrfs_calc_insert_metadata_size. Making these clearer will help when I start using them differently in upcoming patches. Reviewed-by: Nikolay Borisov <nborisov@suse.com> Signed-off-by: Josef Bacik <josef@toxicpanda.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/ctree.h')
1 files changed, 9 insertions, 5 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 20793742c9d3..d27b39858339 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -2451,17 +2451,21 @@ u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset);
u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes);
-static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_fs_info *fs_info,
- unsigned num_items)
+ * Use this if we would be adding new items, as we could split nodes as we cow
+ * down the tree.
+ */
+static inline u64 btrfs_calc_insert_metadata_size(struct btrfs_fs_info *fs_info,
+ unsigned num_items)
return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
- * Doing a truncate won't result in new nodes or leaves, just what we need for
- * COW.
+ * Doing a truncate or a modification won't result in new nodes or leaves, just
+ * what we need for COW.
-static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_fs_info *fs_info,
+static inline u64 btrfs_calc_metadata_size(struct btrfs_fs_info *fs_info,
unsigned num_items)
return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;