]> pilppa.com Git - linux-2.6-omap-h63xx.git/commitdiff
[ACKVEC]: Reduce length of identifiers
authorGerrit Renker <gerrit@erg.abdn.ac.uk>
Sun, 30 Dec 2007 12:19:31 +0000 (04:19 -0800)
committerDavid S. Miller <davem@davemloft.net>
Mon, 28 Jan 2008 22:54:51 +0000 (14:54 -0800)
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
net/dccp/ackvec.h

index 83378f379f72c129670fabf8cbe86e06626485b3..6de4bd195d280cbcd0528a04ecca215665a085f9 100644 (file)
@@ -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 @@ found:
                                              "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;
                        }
index 9671ecd17e00581c8fb81d222cf975ba27a70f68..bcb64fb4acefd5ef96d31637d5d5ff80b439bd87 100644 (file)
  *
  * 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)