[PATCH 4/4] tap: Rename tap_iov_{base,len}

[David Gibson <david@gibson.dropbear.id.au>]

These two functions are typically used to calculate values to go into the
iov_base and iov_len fields of a struct iovec.  They don't have to be used
for that, though.  Rename them in terms of what they actually do: calculate
the base address and total length of the complete frame, including both L2
and tap specific headers.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
---
 tap.h | 14 +++++++-------
 tcp.c | 12 ++++++------
 udp.c |  8 ++++----
 3 files changed, 17 insertions(+), 17 deletions(-)

diff --git a/tap.h b/tap.h
index aa3b1af2..2adc4e2b 100644
--- a/tap.h
+++ b/tap.h
@@ -27,30 +27,30 @@ static inline size_t tap_hdr_len_(const struct ctx *c)
 }
 
 /**
- * tap_iov_base() - Find start of tap frame
+ * tap_frame_base() - Find start of tap frame
  * @c:		Execution context
- * @taph:	Pointer to L2 header buffer
+ * @taph:	Pointer to L2 and tap specific header buffer
  *
  * Returns: pointer to the start of tap frame - suitable for an
  *          iov_base to be passed to tap_send_frames())
  */
-static inline void *tap_iov_base(const struct ctx *c, struct tap_hdr *taph)
+static inline void *tap_frame_base(const struct ctx *c, struct tap_hdr *taph)
 {
 	return (char *)(taph + 1) - tap_hdr_len_(c);
 }
 
 /**
- * tap_iov_len() - Finalize tap frame and return total length
+ * tap_frame_len() - Finalize tap frame and return total length
  * @c:		Execution context
  * @taph:	Tap header to finalize
- * @plen:	L2 payload length (excludes L2 and tap specific headers)
+ * @plen:	L3 packet length (excludes L2 and tap specific headers)
  *
  * Returns: length of the tap frame including L2 and tap specific
  *          headers - suitable for an iov_len to be passed to
  *          tap_send_frames()
  */
-static inline size_t tap_iov_len(const struct ctx *c, struct tap_hdr *taph,
-				 size_t plen)
+static inline size_t tap_frame_len(const struct ctx *c, struct tap_hdr *taph,
+				   size_t plen)
 {
 	if (c->mode == MODE_PASST)
 		taph->vnet_len = htonl(plen + sizeof(taph->eh));
diff --git a/tcp.c b/tcp.c
index 9d90108b..a1860d10 100644
--- a/tcp.c
+++ b/tcp.c
@@ -1014,10 +1014,10 @@ static void tcp_sock4_iov_init(const struct ctx *c)
 	}
 
 	for (i = 0, iov = tcp4_l2_iov; i < TCP_FRAMES_MEM; i++, iov++)
-		iov->iov_base = tap_iov_base(c, &tcp4_l2_buf[i].taph);
+		iov->iov_base = tap_frame_base(c, &tcp4_l2_buf[i].taph);
 
 	for (i = 0, iov = tcp4_l2_flags_iov; i < TCP_FRAMES_MEM; i++, iov++)
-		iov->iov_base = tap_iov_base(c, &tcp4_l2_flags_buf[i].taph);
+		iov->iov_base = tap_frame_base(c, &tcp4_l2_flags_buf[i].taph);
 }
 
 /**
@@ -1045,10 +1045,10 @@ static void tcp_sock6_iov_init(const struct ctx *c)
 	}
 
 	for (i = 0, iov = tcp6_l2_iov; i < TCP_FRAMES_MEM; i++, iov++)
-		iov->iov_base = tap_iov_base(c, &tcp6_l2_buf[i].taph);
+		iov->iov_base = tap_frame_base(c, &tcp6_l2_buf[i].taph);
 
 	for (i = 0, iov = tcp6_l2_flags_iov; i < TCP_FRAMES_MEM; i++, iov++)
-		iov->iov_base = tap_iov_base(c, &tcp6_l2_flags_buf[i].taph);
+		iov->iov_base = tap_frame_base(c, &tcp6_l2_flags_buf[i].taph);
 }
 
 /**
@@ -1454,14 +1454,14 @@ static size_t tcp_l2_buf_fill_headers(const struct ctx *c,
 		ip_len = tcp_fill_headers4(c, conn, &b->iph, &b->th, plen,
 					   check, seq);
 
-		tlen = tap_iov_len(c, &b->taph, ip_len);
+		tlen = tap_frame_len(c, &b->taph, ip_len);
 	} else {
 		struct tcp6_l2_buf_t *b = (struct tcp6_l2_buf_t *)p;
 
 		ip_len = tcp_fill_headers6(c, conn, &b->ip6h, &b->th, plen,
 					   seq);
 
-		tlen = tap_iov_len(c, &b->taph, ip_len);
+		tlen = tap_frame_len(c, &b->taph, ip_len);
 	}
 
 	return tlen;
diff --git a/udp.c b/udp.c
index cba595c9..0a7f3b78 100644
--- a/udp.c
+++ b/udp.c
@@ -318,7 +318,7 @@ static void udp_sock4_iov_init_one(const struct ctx *c, size_t i)
 	mh->msg_iov	= siov;
 	mh->msg_iovlen	= 1;
 
-	tiov->iov_base	= tap_iov_base(c, &buf->taph);
+	tiov->iov_base	= tap_frame_base(c, &buf->taph);
 }
 
 /**
@@ -346,7 +346,7 @@ static void udp_sock6_iov_init_one(const struct ctx *c, size_t i)
 	mh->msg_iov	= siov;
 	mh->msg_iovlen	= 1;
 
-	tiov->iov_base	= tap_iov_base(c, &buf->taph);
+	tiov->iov_base	= tap_frame_base(c, &buf->taph);
 }
 
 /**
@@ -606,7 +606,7 @@ static size_t udp_update_hdr4(const struct ctx *c, struct udp4_l2_buf_t *b,
 	b->uh.dest = htons(dstport);
 	b->uh.len = htons(datalen + sizeof(b->uh));
 
-	return tap_iov_len(c, &b->taph, ip_len);
+	return tap_frame_len(c, &b->taph, ip_len);
 }
 
 /**
@@ -673,7 +673,7 @@ static size_t udp_update_hdr6(const struct ctx *c, struct udp6_l2_buf_t *b,
 	b->uh.len = b->ip6h.payload_len;
 	csum_udp6(&b->uh, src, dst, b->data, datalen);
 
-	return tap_iov_len(c, &b->taph, payload_len + sizeof(b->ip6h));
+	return tap_frame_len(c, &b->taph, payload_len + sizeof(b->ip6h));
 }
 
 /**
-- 
@@ -318,7 +318,7 @@ static void udp_sock4_iov_init_one(const struct ctx *c, size_t i)
 	mh->msg_iov	= siov;
 	mh->msg_iovlen	= 1;
 
-	tiov->iov_base	= tap_iov_base(c, &buf->taph);
+	tiov->iov_base	= tap_frame_base(c, &buf->taph);
 }
 
 /**
@@ -346,7 +346,7 @@ static void udp_sock6_iov_init_one(const struct ctx *c, size_t i)
 	mh->msg_iov	= siov;
 	mh->msg_iovlen	= 1;
 
-	tiov->iov_base	= tap_iov_base(c, &buf->taph);
+	tiov->iov_base	= tap_frame_base(c, &buf->taph);
 }
 
 /**
@@ -606,7 +606,7 @@ static size_t udp_update_hdr4(const struct ctx *c, struct udp4_l2_buf_t *b,
 	b->uh.dest = htons(dstport);
 	b->uh.len = htons(datalen + sizeof(b->uh));
 
-	return tap_iov_len(c, &b->taph, ip_len);
+	return tap_frame_len(c, &b->taph, ip_len);
 }
 
 /**
@@ -673,7 +673,7 @@ static size_t udp_update_hdr6(const struct ctx *c, struct udp6_l2_buf_t *b,
 	b->uh.len = b->ip6h.payload_len;
 	csum_udp6(&b->uh, src, dst, b->data, datalen);
 
-	return tap_iov_len(c, &b->taph, payload_len + sizeof(b->ip6h));
+	return tap_frame_len(c, &b->taph, payload_len + sizeof(b->ip6h));
 }
 
 /**
-- 
2.44.0