[ACKVEC]: Reduce length of identifiers

This is reduces the length of the struct ackvec/ackvec_record fields. It is
a purely text-based replacement:

	s#dccpavr_#avr_#g;
	s#dccpav_#av_#g;

and increases readability somewhat.
Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/dccp/ackvec.c

@@ -30,7 +30,7 @@ static struct dccp_ackvec_record *dccp_ackvec_record_new(void)
 			kmem_cache_alloc(dccp_ackvec_record_slab, GFP_ATOMIC);
 
 	if (avr != NULL)
-		INIT_LIST_HEAD(&avr->dccpavr_node);
+		INIT_LIST_HEAD(&avr->avr_node);
 
 	return avr;
 }
@@ -40,7 +40,7 @@ static void dccp_ackvec_record_delete(struct dccp_ackvec_record *avr)
 	if (unlikely(avr == NULL))
 		return;
 	/* Check if deleting a linked record */
-	WARN_ON(!list_empty(&avr->dccpavr_node));
+	WARN_ON(!list_empty(&avr->avr_node));
 	kmem_cache_free(dccp_ackvec_record_slab, avr);
 }
 
@@ -52,16 +52,15 @@ static void dccp_ackvec_insert_avr(struct dccp_ackvec *av,
 	 * just add the AVR at the head of the list.
 	 * -sorbo.
 	 */
-	if (!list_empty(&av->dccpav_records)) {
+	if (!list_empty(&av->av_records)) {
 		const struct dccp_ackvec_record *head =
-					list_entry(av->dccpav_records.next,
+					list_entry(av->av_records.next,
 						   struct dccp_ackvec_record,
-						   dccpavr_node);
-		BUG_ON(before48(avr->dccpavr_ack_seqno,
-				head->dccpavr_ack_seqno));
+						   avr_node);
+		BUG_ON(before48(avr->avr_ack_seqno, head->avr_ack_seqno));
 	}
 
-	list_add(&avr->dccpavr_node, &av->dccpav_records);
+	list_add(&avr->avr_node, &av->av_records);
 }
 
 int dccp_insert_option_ackvec(struct sock *sk, struct sk_buff *skb)
@@ -69,9 +68,8 @@ int dccp_insert_option_ackvec(struct sock *sk, struct sk_buff *skb)
 	struct dccp_sock *dp = dccp_sk(sk);
 	struct dccp_ackvec *av = dp->dccps_hc_rx_ackvec;
 	/* Figure out how many options do we need to represent the ackvec */
-	const u16 nr_opts = DIV_ROUND_UP(av->dccpav_vec_len,
-					 DCCP_MAX_ACKVEC_OPT_LEN);
-	u16 len = av->dccpav_vec_len + 2 * nr_opts, i;
+	const u16 nr_opts = DIV_ROUND_UP(av->av_vec_len, DCCP_MAX_ACKVEC_OPT_LEN);
+	u16 len = av->av_vec_len + 2 * nr_opts, i;
 	u32 elapsed_time;
 	const unsigned char *tail, *from;
 	unsigned char *to;
@@ -81,7 +79,7 @@ int dccp_insert_option_ackvec(struct sock *sk, struct sk_buff *skb)
 	if (DCCP_SKB_CB(skb)->dccpd_opt_len + len > DCCP_MAX_OPT_LEN)
 		return -1;
 
-	delta = ktime_us_delta(ktime_get_real(), av->dccpav_time);
+	delta = ktime_us_delta(ktime_get_real(), av->av_time);
 	elapsed_time = delta / 10;
 
 	if (elapsed_time != 0 &&
@@ -95,9 +93,9 @@ int dccp_insert_option_ackvec(struct sock *sk, struct sk_buff *skb)
 	DCCP_SKB_CB(skb)->dccpd_opt_len += len;
 
 	to   = skb_push(skb, len);
-	len  = av->dccpav_vec_len;
-	from = av->dccpav_buf + av->dccpav_buf_head;
-	tail = av->dccpav_buf + DCCP_MAX_ACKVEC_LEN;
+	len  = av->av_vec_len;
+	from = av->av_buf + av->av_buf_head;
+	tail = av->av_buf + DCCP_MAX_ACKVEC_LEN;
 
 	for (i = 0; i < nr_opts; ++i) {
 		int copylen = len;
@@ -116,7 +114,7 @@ int dccp_insert_option_ackvec(struct sock *sk, struct sk_buff *skb)
 			to	+= tailsize;
 			len	-= tailsize;
 			copylen	-= tailsize;
-			from	= av->dccpav_buf;
+			from	= av->av_buf;
 		}
 
 		memcpy(to, from, copylen);
@@ -134,19 +132,19 @@ int dccp_insert_option_ackvec(struct sock *sk, struct sk_buff *skb)
 	 *	buf_head; ack_ackno will equal buf_ackno; and ack_nonce will
 	 *	equal buf_nonce.
 	 */
-	avr->dccpavr_ack_seqno = DCCP_SKB_CB(skb)->dccpd_seq;
-	avr->dccpavr_ack_ptr   = av->dccpav_buf_head;
-	avr->dccpavr_ack_ackno = av->dccpav_buf_ackno;
-	avr->dccpavr_ack_nonce = av->dccpav_buf_nonce;
-	avr->dccpavr_sent_len  = av->dccpav_vec_len;
+	avr->avr_ack_seqno = DCCP_SKB_CB(skb)->dccpd_seq;
+	avr->avr_ack_ptr   = av->av_buf_head;
+	avr->avr_ack_ackno = av->av_buf_ackno;
+	avr->avr_ack_nonce = av->av_buf_nonce;
+	avr->avr_sent_len  = av->av_vec_len;
 
 	dccp_ackvec_insert_avr(av, avr);
 
 	dccp_pr_debug("%s ACK Vector 0, len=%d, ack_seqno=%llu, "
 		      "ack_ackno=%llu\n",
-		      dccp_role(sk), avr->dccpavr_sent_len,
-		      (unsigned long long)avr->dccpavr_ack_seqno,
-		      (unsigned long long)avr->dccpavr_ack_ackno);
+		      dccp_role(sk), avr->avr_sent_len,
+		      (unsigned long long)avr->avr_ack_seqno,
+		      (unsigned long long)avr->avr_ack_ackno);
 	return 0;
 }
 
@@ -155,12 +153,12 @@ struct dccp_ackvec *dccp_ackvec_alloc(const gfp_t priority)
 	struct dccp_ackvec *av = kmem_cache_alloc(dccp_ackvec_slab, priority);
 
 	if (av != NULL) {
-		av->dccpav_buf_head	= DCCP_MAX_ACKVEC_LEN - 1;
-		av->dccpav_buf_ackno	= UINT48_MAX + 1;
-		av->dccpav_buf_nonce = av->dccpav_buf_nonce = 0;
-		av->dccpav_time	     = ktime_set(0, 0);
-		av->dccpav_vec_len	= 0;
-		INIT_LIST_HEAD(&av->dccpav_records);
+		av->av_buf_head	 = DCCP_MAX_ACKVEC_LEN - 1;
+		av->av_buf_ackno = UINT48_MAX + 1;
+		av->av_buf_nonce = 0;
+		av->av_time	 = ktime_set(0, 0);
+		av->av_vec_len	 = 0;
+		INIT_LIST_HEAD(&av->av_records);
 	}
 
 	return av;
@@ -171,12 +169,11 @@ void dccp_ackvec_free(struct dccp_ackvec *av)
 	if (unlikely(av == NULL))
 		return;
 
-	if (!list_empty(&av->dccpav_records)) {
+	if (!list_empty(&av->av_records)) {
 		struct dccp_ackvec_record *avr, *next;
 
-		list_for_each_entry_safe(avr, next, &av->dccpav_records,
-					 dccpavr_node) {
-			list_del_init(&avr->dccpavr_node);
+		list_for_each_entry_safe(avr, next, &av->av_records, avr_node) {
+			list_del_init(&avr->avr_node);
 			dccp_ackvec_record_delete(avr);
 		}
 	}
@@ -187,13 +184,13 @@ void dccp_ackvec_free(struct dccp_ackvec *av)
 static inline u8 dccp_ackvec_state(const struct dccp_ackvec *av,
 				   const u32 index)
 {
-	return av->dccpav_buf[index] & DCCP_ACKVEC_STATE_MASK;
+	return av->av_buf[index] & DCCP_ACKVEC_STATE_MASK;
 }
 
 static inline u8 dccp_ackvec_len(const struct dccp_ackvec *av,
 				 const u32 index)
 {
-	return av->dccpav_buf[index] & DCCP_ACKVEC_LEN_MASK;
+	return av->av_buf[index] & DCCP_ACKVEC_LEN_MASK;
 }
 
 /*
@@ -208,29 +205,29 @@ static inline int dccp_ackvec_set_buf_head_state(struct dccp_ackvec *av,
 	unsigned int gap;
 	long new_head;
 
-	if (av->dccpav_vec_len + packets > DCCP_MAX_ACKVEC_LEN)
+	if (av->av_vec_len + packets > DCCP_MAX_ACKVEC_LEN)
 		return -ENOBUFS;
 
 	gap	 = packets - 1;
-	new_head = av->dccpav_buf_head - packets;
+	new_head = av->av_buf_head - packets;
 
 	if (new_head < 0) {
 		if (gap > 0) {
-			memset(av->dccpav_buf, DCCP_ACKVEC_STATE_NOT_RECEIVED,
+			memset(av->av_buf, DCCP_ACKVEC_STATE_NOT_RECEIVED,
 			       gap + new_head + 1);
 			gap = -new_head;
 		}
 		new_head += DCCP_MAX_ACKVEC_LEN;
 	}
 
-	av->dccpav_buf_head = new_head;
+	av->av_buf_head = new_head;
 
 	if (gap > 0)
-		memset(av->dccpav_buf + av->dccpav_buf_head + 1,
+		memset(av->av_buf + av->av_buf_head + 1,
 		       DCCP_ACKVEC_STATE_NOT_RECEIVED, gap);
 
-	av->dccpav_buf[av->dccpav_buf_head] = state;
-	av->dccpav_vec_len += packets;
+	av->av_buf[av->av_buf_head] = state;
+	av->av_vec_len += packets;
 	return 0;
 }
 
@@ -243,7 +240,7 @@ int dccp_ackvec_add(struct dccp_ackvec *av, const struct sock *sk,
 	/*
 	 * Check at the right places if the buffer is full, if it is, tell the
 	 * caller to start dropping packets till the HC-Sender acks our ACK
-	 * vectors, when we will free up space in dccpav_buf.
+	 * vectors, when we will free up space in av_buf.
 	 *
 	 * We may well decide to do buffer compression, etc, but for now lets
 	 * just drop.
@@ -263,22 +260,20 @@ int dccp_ackvec_add(struct dccp_ackvec *av, const struct sock *sk,
 	 */
 
 	/* See if this is the first ackno being inserted */
-	if (av->dccpav_vec_len == 0) {
-		av->dccpav_buf[av->dccpav_buf_head] = state;
-		av->dccpav_vec_len = 1;
-	} else if (after48(ackno, av->dccpav_buf_ackno)) {
-		const u64 delta = dccp_delta_seqno(av->dccpav_buf_ackno,
-						   ackno);
+	if (av->av_vec_len == 0) {
+		av->av_buf[av->av_buf_head] = state;
+		av->av_vec_len = 1;
+	} else if (after48(ackno, av->av_buf_ackno)) {
+		const u64 delta = dccp_delta_seqno(av->av_buf_ackno, ackno);
 
 		/*
 		 * Look if the state of this packet is the same as the
 		 * previous ackno and if so if we can bump the head len.
 		 */
 		if (delta == 1 &&
-		    dccp_ackvec_state(av, av->dccpav_buf_head) == state &&
-		    (dccp_ackvec_len(av, av->dccpav_buf_head) <
-		     DCCP_ACKVEC_LEN_MASK))
-			av->dccpav_buf[av->dccpav_buf_head]++;
+		    dccp_ackvec_state(av, av->av_buf_head) == state &&
+		    dccp_ackvec_len(av, av->av_buf_head) < DCCP_ACKVEC_LEN_MASK)
+			av->av_buf[av->av_buf_head]++;
 		else if (dccp_ackvec_set_buf_head_state(av, delta, state))
 			return -ENOBUFS;
 	} else {
@@ -290,14 +285,14 @@ int dccp_ackvec_add(struct dccp_ackvec *av, const struct sock *sk,
 		 *	the byte corresponding to S. (Indexing structures
 		 *	could reduce the complexity of this scan.)
 		 */
-		u64 delta = dccp_delta_seqno(ackno, av->dccpav_buf_ackno);
-		u32 index = av->dccpav_buf_head;
+		u64 delta = dccp_delta_seqno(ackno, av->av_buf_ackno);
+		u32 index = av->av_buf_head;
 
 		while (1) {
 			const u8 len = dccp_ackvec_len(av, index);
 			const u8 state = dccp_ackvec_state(av, index);
 			/*
-			 * valid packets not yet in dccpav_buf have a reserved
+			 * valid packets not yet in av_buf have a reserved
 			 * entry, with a len equal to 0.
 			 */
 			if (state == DCCP_ACKVEC_STATE_NOT_RECEIVED &&
@@ -305,7 +300,7 @@ int dccp_ackvec_add(struct dccp_ackvec *av, const struct sock *sk,
 							 reserved seat! */
 				dccp_pr_debug("Found %llu reserved seat!\n",
 					      (unsigned long long)ackno);
-				av->dccpav_buf[index] = state;
+				av->av_buf[index] = state;
 				goto out;
 			}
 			/* len == 0 means one packet */
@@ -318,8 +313,8 @@ int dccp_ackvec_add(struct dccp_ackvec *av, const struct sock *sk,
 		}
 	}
 
-	av->dccpav_buf_ackno = ackno;
-	av->dccpav_time = ktime_get_real();
+	av->av_buf_ackno = ackno;
+	av->av_time = ktime_get_real();
 out:
 	return 0;
 
@@ -349,9 +344,9 @@ void dccp_ackvector_print(const u64 ackno, const unsigned char *vector, int len)
 
 void dccp_ackvec_print(const struct dccp_ackvec *av)
 {
-	dccp_ackvector_print(av->dccpav_buf_ackno,
-			     av->dccpav_buf + av->dccpav_buf_head,
-			     av->dccpav_vec_len);
+	dccp_ackvector_print(av->av_buf_ackno,
+			     av->av_buf + av->av_buf_head,
+			     av->av_vec_len);
 }
 #endif
 
@@ -361,17 +356,15 @@ static void dccp_ackvec_throw_record(struct dccp_ackvec *av,
 	struct dccp_ackvec_record *next;
 
 	/* sort out vector length */
-	if (av->dccpav_buf_head <= avr->dccpavr_ack_ptr)
-		av->dccpav_vec_len = avr->dccpavr_ack_ptr - av->dccpav_buf_head;
+	if (av->av_buf_head <= avr->avr_ack_ptr)
+		av->av_vec_len = avr->avr_ack_ptr - av->av_buf_head;
 	else
-		av->dccpav_vec_len = DCCP_MAX_ACKVEC_LEN - 1
-				     - av->dccpav_buf_head
-				     + avr->dccpavr_ack_ptr;
+		av->av_vec_len = DCCP_MAX_ACKVEC_LEN - 1 -
+				 av->av_buf_head + avr->avr_ack_ptr;
 
 	/* free records */
-	list_for_each_entry_safe_from(avr, next, &av->dccpav_records,
-				      dccpavr_node) {
-		list_del_init(&avr->dccpavr_node);
+	list_for_each_entry_safe_from(avr, next, &av->av_records, avr_node) {
+		list_del_init(&avr->avr_node);
 		dccp_ackvec_record_delete(avr);
 	}
 }
@@ -386,16 +379,16 @@ void dccp_ackvec_check_rcv_ackno(struct dccp_ackvec *av, struct sock *sk,
 	 * windows. We will be receiving ACKs for stuff we sent a while back
 	 * -sorbo.
 	 */
-	list_for_each_entry_reverse(avr, &av->dccpav_records, dccpavr_node) {
-		if (ackno == avr->dccpavr_ack_seqno) {
+	list_for_each_entry_reverse(avr, &av->av_records, avr_node) {
+		if (ackno == avr->avr_ack_seqno) {
 			dccp_pr_debug("%s ACK packet 0, len=%d, ack_seqno=%llu, "
 				      "ack_ackno=%llu, ACKED!\n",
 				      dccp_role(sk), 1,
-				      (unsigned long long)avr->dccpavr_ack_seqno,
-				      (unsigned long long)avr->dccpavr_ack_ackno);
+				      (unsigned long long)avr->avr_ack_seqno,
+				      (unsigned long long)avr->avr_ack_ackno);
 			dccp_ackvec_throw_record(av, avr);
 			break;
-		} else if (avr->dccpavr_ack_seqno > ackno)
+		} else if (avr->avr_ack_seqno > ackno)
 			break; /* old news */
 	}
 }
@@ -409,7 +402,7 @@ static void dccp_ackvec_check_rcv_ackvector(struct dccp_ackvec *av,
 	struct dccp_ackvec_record *avr;
 
 	/* Check if we actually sent an ACK vector */
-	if (list_empty(&av->dccpav_records))
+	if (list_empty(&av->av_records))
 		return;
 
 	i = len;
@@ -418,8 +411,7 @@ static void dccp_ackvec_check_rcv_ackvector(struct dccp_ackvec *av,
 	 * I think it might be more efficient to work backwards. See comment on
 	 * rcv_ackno. -sorbo.
 	 */
-	avr = list_entry(av->dccpav_records.next, struct dccp_ackvec_record,
-			 dccpavr_node);
+	avr = list_entry(av->av_records.next, struct dccp_ackvec_record, avr_node);
 	while (i--) {
 		const u8 rl = *vector & DCCP_ACKVEC_LEN_MASK;
 		u64 ackno_end_rl;
@@ -430,15 +422,14 @@ static void dccp_ackvec_check_rcv_ackvector(struct dccp_ackvec *av,
 		 * If our AVR sequence number is greater than the ack, go
 		 * forward in the AVR list until it is not so.
 		 */
-		list_for_each_entry_from(avr, &av->dccpav_records,
-					 dccpavr_node) {
-			if (!after48(avr->dccpavr_ack_seqno, *ackno))
+		list_for_each_entry_from(avr, &av->av_records, avr_node) {
+			if (!after48(avr->avr_ack_seqno, *ackno))
 				goto found;
 		}
-		/* End of the dccpav_records list, not found, exit */
+		/* End of the av_records list, not found, exit */
 		break;
 found:
-		if (between48(avr->dccpavr_ack_seqno, ackno_end_rl, *ackno)) {
+		if (between48(avr->avr_ack_seqno, ackno_end_rl, *ackno)) {
 			const u8 state = *vector & DCCP_ACKVEC_STATE_MASK;
 			if (state != DCCP_ACKVEC_STATE_NOT_RECEIVED) {
 				dccp_pr_debug("%s ACK vector 0, len=%d, "
@@ -446,9 +437,9 @@ static void dccp_ackvec_check_rcv_ackvector(struct dccp_ackvec *av,
 					      "ACKED!\n",
 					      dccp_role(sk), len,
 					      (unsigned long long)
-					      avr->dccpavr_ack_seqno,
+					      avr->avr_ack_seqno,
 					      (unsigned long long)
-					      avr->dccpavr_ack_ackno);
+					      avr->avr_ack_ackno);
 				dccp_ackvec_throw_record(av, avr);
 				break;
 			}

net/dccp/ackvec.h

@@ -32,54 +32,54 @@
  *
  * This data structure is the one defined in RFC 4340, Appendix A.
  *
- * @dccpav_buf_head - circular buffer head
- * @dccpav_buf_tail - circular buffer tail
- * @dccpav_buf_ackno - ack # of the most recent packet acknowledgeable in the
- * 		       buffer (i.e. %dccpav_buf_head)
- * @dccpav_buf_nonce - the one-bit sum of the ECN Nonces on all packets acked
+ * @av_buf_head - circular buffer head
+ * @av_buf_tail - circular buffer tail
+ * @av_buf_ackno - ack # of the most recent packet acknowledgeable in the
+ *		       buffer (i.e. %av_buf_head)
+ * @av_buf_nonce - the one-bit sum of the ECN Nonces on all packets acked
  * 		       by the buffer with State 0
  *
  * Additionally, the HC-Receiver must keep some information about the
  * Ack Vectors it has recently sent. For each packet sent carrying an
  * Ack Vector, it remembers four variables:
  *
- * @dccpav_records - list of dccp_ackvec_record
- * @dccpav_ack_nonce - the one-bit sum of the ECN Nonces for all State 0.
+ * @av_records - list of dccp_ackvec_record
+ * @av_ack_nonce - the one-bit sum of the ECN Nonces for all State 0.
  *
- * @dccpav_time		- the time in usecs
- * @dccpav_buf - circular buffer of acknowledgeable packets
+ * @av_time - the time in usecs
+ * @av_buf - circular buffer of acknowledgeable packets
  */
 struct dccp_ackvec {
-	u64		dccpav_buf_ackno;
-	struct list_head dccpav_records;
-	ktime_t		dccpav_time;
-	u16		dccpav_buf_head;
-	u16		dccpav_vec_len;
-	u8		dccpav_buf_nonce;
-	u8		dccpav_ack_nonce;
-	u8		dccpav_buf[DCCP_MAX_ACKVEC_LEN];
+	u64			av_buf_ackno;
+	struct list_head	av_records;
+	ktime_t			av_time;
+	u16			av_buf_head;
+	u16			av_vec_len;
+	u8			av_buf_nonce;
+	u8			av_ack_nonce;
+	u8			av_buf[DCCP_MAX_ACKVEC_LEN];
 };
 
 /** struct dccp_ackvec_record - ack vector record
  *
  * ACK vector record as defined in Appendix A of spec.
  *
- * The list is sorted by dccpavr_ack_seqno
+ * The list is sorted by avr_ack_seqno
  *
- * @dccpavr_node - node in dccpav_records
- * @dccpavr_ack_seqno - sequence number of the packet this record was sent on
- * @dccpavr_ack_ackno - sequence number being acknowledged
- * @dccpavr_ack_ptr - pointer into dccpav_buf where this record starts
- * @dccpavr_ack_nonce - dccpav_ack_nonce at the time this record was sent
- * @dccpavr_sent_len - length of the record in dccpav_buf
+ * @avr_node - node in av_records
+ * @avr_ack_seqno - sequence number of the packet this record was sent on
+ * @avr_ack_ackno - sequence number being acknowledged
+ * @avr_ack_ptr - pointer into av_buf where this record starts
+ * @avr_ack_nonce - av_ack_nonce at the time this record was sent
+ * @avr_sent_len - lenght of the record in av_buf
  */
 struct dccp_ackvec_record {
-	struct list_head dccpavr_node;
-	u64		 dccpavr_ack_seqno;
-	u64		 dccpavr_ack_ackno;
-	u16		 dccpavr_ack_ptr;
-	u16		 dccpavr_sent_len;
-	u8		 dccpavr_ack_nonce;
+	struct list_head avr_node;
+	u64		 avr_ack_seqno;
+	u64		 avr_ack_ackno;
+	u16		 avr_ack_ptr;
+	u16		 avr_sent_len;
+	u8		 avr_ack_nonce;
 };
 
 struct sock;
@@ -105,7 +105,7 @@ extern int dccp_insert_option_ackvec(struct sock *sk, struct sk_buff *skb);
 
 static inline int dccp_ackvec_pending(const struct dccp_ackvec *av)
 {
-	return av->dccpav_vec_len;
+	return av->av_vec_len;
 }
 #else /* CONFIG_IP_DCCP_ACKVEC */
 static inline int dccp_ackvec_init(void)