bcachefs: Inline some fast paths

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

fs/bcachefs/extents.c

@@ -806,19 +806,6 @@ bool bch2_cut_back(struct bpos where, struct bkey *k)
 	return true;
 }
 
-/**
- * bch_key_resize - adjust size of @k
- *
- * bkey_start_offset(k) will be preserved, modifies where the extent ends
- */
-void bch2_key_resize(struct bkey *k,
-		    unsigned new_size)
-{
-	k->p.offset -= k->size;
-	k->p.offset += new_size;
-	k->size = new_size;
-}
-
 static bool extent_i_save(struct btree *b, struct bkey_packed *dst,
 			  struct bkey_i *src)
 {

fs/bcachefs/extents.h

@@ -540,7 +540,18 @@ static inline void bch2_cut_front(struct bpos where, struct bkey_i *k)
 }
 
 bool bch2_cut_back(struct bpos, struct bkey *);
-void bch2_key_resize(struct bkey *, unsigned);
+
+/**
+ * bch_key_resize - adjust size of @k
+ *
+ * bkey_start_offset(k) will be preserved, modifies where the extent ends
+ */
+static inline void bch2_key_resize(struct bkey *k, unsigned new_size)
+{
+	k->p.offset -= k->size;
+	k->p.offset += new_size;
+	k->size = new_size;
+}
 
 /*
  * In extent_sort_fix_overlapping(), insert_fixup_extent(),

fs/bcachefs/fs-io.c

@@ -1036,7 +1036,7 @@ static void bchfs_read(struct btree_trans *trans, struct btree_iter *iter,
 			bkey_start_offset(k.k);
 		sectors = k.k->size - offset_into_extent;
 
-		ret = bch2_read_indirect_extent(trans, iter,
+		ret = bch2_read_indirect_extent(trans,
 					&offset_into_extent, &tmp.k);
 		if (ret)
 			break;

fs/bcachefs/fs.c

@@ -1233,7 +1233,7 @@ static int bch2_fiemap(struct inode *vinode, struct fiemap_extent_info *info,
 			bkey_start_offset(k.k);
 		sectors			= k.k->size - offset_into_extent;
 
-		ret = bch2_read_indirect_extent(&trans, iter,
+		ret = bch2_read_indirect_extent(&trans,
 					&offset_into_extent, &cur.k);
 		if (ret)
 			break;

fs/bcachefs/io.c

@@ -1305,7 +1305,7 @@ static void bch2_read_retry(struct bch_fs *c, struct bch_read_bio *rbio,
 			bkey_start_offset(k.k);
 		sectors = k.k->size - offset_into_extent;
 
-		ret = bch2_read_indirect_extent(&trans, iter,
+		ret = bch2_read_indirect_extent(&trans,
 					&offset_into_extent, &tmp.k);
 		if (ret)
 			break;
@@ -1594,19 +1594,15 @@ static void bch2_read_endio(struct bio *bio)
 	bch2_rbio_punt(rbio, __bch2_read_endio, context, wq);
 }
 
-int bch2_read_indirect_extent(struct btree_trans *trans,
-			      struct btree_iter *extent_iter,
-			      unsigned *offset_into_extent,
-			      struct bkey_i *orig_k)
+int __bch2_read_indirect_extent(struct btree_trans *trans,
+				unsigned *offset_into_extent,
+				struct bkey_i *orig_k)
 {
 	struct btree_iter *iter;
 	struct bkey_s_c k;
 	u64 reflink_offset;
 	int ret;
 
-	if (orig_k->k.type != KEY_TYPE_reflink_p)
-		return 0;
-
 	reflink_offset = le64_to_cpu(bkey_i_to_reflink_p(orig_k)->v.idx) +
 		*offset_into_extent;
 
@@ -1920,7 +1916,7 @@ void bch2_read(struct bch_fs *c, struct bch_read_bio *rbio, u64 inode)
 			bkey_start_offset(k.k);
 		sectors = k.k->size - offset_into_extent;
 
-		ret = bch2_read_indirect_extent(&trans, iter,
+		ret = bch2_read_indirect_extent(&trans,
 					&offset_into_extent, &tmp.k);
 		if (ret)
 			goto err;

fs/bcachefs/io.h

@@ -99,8 +99,17 @@ struct bch_devs_mask;
 struct cache_promote_op;
 struct extent_ptr_decoded;
 
-int bch2_read_indirect_extent(struct btree_trans *, struct btree_iter *,
-			      unsigned *, struct bkey_i *);
+int __bch2_read_indirect_extent(struct btree_trans *, unsigned *,
+				struct bkey_i *);
+
+static inline int bch2_read_indirect_extent(struct btree_trans *trans,
+					    unsigned *offset_into_extent,
+					    struct bkey_i *k)
+{
+	return k->k.type == KEY_TYPE_reflink_p
+		? __bch2_read_indirect_extent(trans, offset_into_extent, k)
+		: 0;
+}
 
 enum bch_read_flags {
 	BCH_READ_RETRY_IF_STALE		= 1 << 0,