rxrpc: The offset field in struct rxrpc_skb_priv is unnecessary

The offset field in struct rxrpc_skb_priv is unnecessary as the value can
always be calculated.

Signed-off-by: David Howells <dhowells@redhat.com>

1 files changed, 12 insertions, 11 deletions

diff --git a/net/rxrpc/input.c b/net/rxrpc/input.c
index 7993473e56bb..5ba35b4a907b 100644
--- a/net/rxrpc/input.c
+++ b/net/rxrpc/input.c
@@ -358,7 +358,7 @@ static bool rxrpc_receiving_reply(struct rxrpc_call *call)
 static bool rxrpc_validate_jumbo(struct sk_buff *skb)
 {
 	struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
-	unsigned int offset = sp->offset;
+	unsigned int offset = sizeof(struct rxrpc_wire_header);
 	unsigned int len = skb->len;
 	int nr_jumbo = 1;
 	u8 flags = sp->hdr.flags;
@@ -419,7 +419,7 @@ static void rxrpc_input_data(struct rxrpc_call *call, struct sk_buff *skb,
 			     u16 skew)
 {
 	struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
-	unsigned int offset = sp->offset;
+	unsigned int offset = sizeof(struct rxrpc_wire_header);
 	unsigned int ix;
 	rxrpc_serial_t serial = sp->hdr.serial, ack_serial = 0;
 	rxrpc_seq_t seq = sp->hdr.seq, hard_ack;
@@ -746,15 +746,16 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb,
 	} buf;
 	rxrpc_serial_t acked_serial;
 	rxrpc_seq_t first_soft_ack, hard_ack;
-	int nr_acks, offset;
+	int nr_acks, offset, ioffset;
 
 	_enter("");
 
-	if (skb_copy_bits(skb, sp->offset, &buf.ack, sizeof(buf.ack)) < 0) {
+	offset = sizeof(struct rxrpc_wire_header);
+	if (skb_copy_bits(skb, offset, &buf.ack, sizeof(buf.ack)) < 0) {
 		_debug("extraction failure");
 		return rxrpc_proto_abort("XAK", call, 0);
 	}
-	sp->offset += sizeof(buf.ack);
+	offset += sizeof(buf.ack);
 
 	acked_serial = ntohl(buf.ack.serial);
 	first_soft_ack = ntohl(buf.ack.firstPacket);
@@ -792,9 +793,9 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb,
 				  rxrpc_propose_ack_respond_to_ack);
 	}
 
-	offset = sp->offset + nr_acks + 3;
-	if (skb->len >= offset + sizeof(buf.info)) {
-		if (skb_copy_bits(skb, offset, &buf.info, sizeof(buf.info)) < 0)
+	ioffset = offset + nr_acks + 3;
+	if (skb->len >= ioffset + sizeof(buf.info)) {
+		if (skb_copy_bits(skb, ioffset, &buf.info, sizeof(buf.info)) < 0)
 			return rxrpc_proto_abort("XAI", call, 0);
 		rxrpc_input_ackinfo(call, skb, &buf.info);
 	}
@@ -832,7 +833,7 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb,
 		rxrpc_rotate_tx_window(call, hard_ack, &summary);
 
 	if (nr_acks > 0) {
-		if (skb_copy_bits(skb, sp->offset, buf.acks, nr_acks) < 0)
+		if (skb_copy_bits(skb, offset, buf.acks, nr_acks) < 0)
 			return rxrpc_proto_abort("XSA", call, 0);
 		rxrpc_input_soft_acks(call, buf.acks, first_soft_ack, nr_acks,
 				      &summary);
@@ -880,7 +881,8 @@ static void rxrpc_input_abort(struct rxrpc_call *call, struct sk_buff *skb)
 	_enter("");
 
 	if (skb->len >= 4 &&
-	    skb_copy_bits(skb, sp->offset, &wtmp, sizeof(wtmp)) >= 0)
+	    skb_copy_bits(skb, sizeof(struct rxrpc_wire_header),
+			  &wtmp, sizeof(wtmp)) >= 0)
 		abort_code = ntohl(wtmp);
 
 	_proto("Rx ABORT %%%u { %x }", sp->hdr.serial, abort_code);
@@ -996,7 +998,6 @@ int rxrpc_extract_header(struct rxrpc_skb_priv *sp, struct sk_buff *skb)
 	sp->hdr.securityIndex	= whdr.securityIndex;
 	sp->hdr._rsvd		= ntohs(whdr._rsvd);
 	sp->hdr.serviceId	= ntohs(whdr.serviceId);
-	sp->offset = sizeof(whdr);
 	return 0;
 }