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-rw-r--r--net/dccp/ccids/ccid2.c327
-rw-r--r--net/dccp/ccids/ccid2.h46
-rw-r--r--net/dccp/ccids/ccid3.c400
-rw-r--r--net/dccp/ccids/ccid3.h120
4 files changed, 433 insertions, 460 deletions
diff --git a/net/dccp/ccids/ccid2.c b/net/dccp/ccids/ccid2.c
index e8cf99e880b0..a47a8c918ee8 100644
--- a/net/dccp/ccids/ccid2.c
+++ b/net/dccp/ccids/ccid2.c
@@ -33,20 +33,20 @@
33static int ccid2_debug; 33static int ccid2_debug;
34#define ccid2_pr_debug(format, a...) DCCP_PR_DEBUG(ccid2_debug, format, ##a) 34#define ccid2_pr_debug(format, a...) DCCP_PR_DEBUG(ccid2_debug, format, ##a)
35 35
36static void ccid2_hc_tx_check_sanity(const struct ccid2_hc_tx_sock *hctx) 36static void ccid2_hc_tx_check_sanity(const struct ccid2_hc_tx_sock *hc)
37{ 37{
38 int len = 0; 38 int len = 0;
39 int pipe = 0; 39 int pipe = 0;
40 struct ccid2_seq *seqp = hctx->ccid2hctx_seqh; 40 struct ccid2_seq *seqp = hc->tx_seqh;
41 41
42 /* there is data in the chain */ 42 /* there is data in the chain */
43 if (seqp != hctx->ccid2hctx_seqt) { 43 if (seqp != hc->tx_seqt) {
44 seqp = seqp->ccid2s_prev; 44 seqp = seqp->ccid2s_prev;
45 len++; 45 len++;
46 if (!seqp->ccid2s_acked) 46 if (!seqp->ccid2s_acked)
47 pipe++; 47 pipe++;
48 48
49 while (seqp != hctx->ccid2hctx_seqt) { 49 while (seqp != hc->tx_seqt) {
50 struct ccid2_seq *prev = seqp->ccid2s_prev; 50 struct ccid2_seq *prev = seqp->ccid2s_prev;
51 51
52 len++; 52 len++;
@@ -63,30 +63,30 @@ static void ccid2_hc_tx_check_sanity(const struct ccid2_hc_tx_sock *hctx)
63 } 63 }
64 } 64 }
65 65
66 BUG_ON(pipe != hctx->ccid2hctx_pipe); 66 BUG_ON(pipe != hc->tx_pipe);
67 ccid2_pr_debug("len of chain=%d\n", len); 67 ccid2_pr_debug("len of chain=%d\n", len);
68 68
69 do { 69 do {
70 seqp = seqp->ccid2s_prev; 70 seqp = seqp->ccid2s_prev;
71 len++; 71 len++;
72 } while (seqp != hctx->ccid2hctx_seqh); 72 } while (seqp != hc->tx_seqh);
73 73
74 ccid2_pr_debug("total len=%d\n", len); 74 ccid2_pr_debug("total len=%d\n", len);
75 BUG_ON(len != hctx->ccid2hctx_seqbufc * CCID2_SEQBUF_LEN); 75 BUG_ON(len != hc->tx_seqbufc * CCID2_SEQBUF_LEN);
76} 76}
77#else 77#else
78#define ccid2_pr_debug(format, a...) 78#define ccid2_pr_debug(format, a...)
79#define ccid2_hc_tx_check_sanity(hctx) 79#define ccid2_hc_tx_check_sanity(hc)
80#endif 80#endif
81 81
82static int ccid2_hc_tx_alloc_seq(struct ccid2_hc_tx_sock *hctx) 82static int ccid2_hc_tx_alloc_seq(struct ccid2_hc_tx_sock *hc)
83{ 83{
84 struct ccid2_seq *seqp; 84 struct ccid2_seq *seqp;
85 int i; 85 int i;
86 86
87 /* check if we have space to preserve the pointer to the buffer */ 87 /* check if we have space to preserve the pointer to the buffer */
88 if (hctx->ccid2hctx_seqbufc >= (sizeof(hctx->ccid2hctx_seqbuf) / 88 if (hc->tx_seqbufc >= (sizeof(hc->tx_seqbuf) /
89 sizeof(struct ccid2_seq*))) 89 sizeof(struct ccid2_seq *)))
90 return -ENOMEM; 90 return -ENOMEM;
91 91
92 /* allocate buffer and initialize linked list */ 92 /* allocate buffer and initialize linked list */
@@ -102,29 +102,29 @@ static int ccid2_hc_tx_alloc_seq(struct ccid2_hc_tx_sock *hctx)
102 seqp->ccid2s_prev = &seqp[CCID2_SEQBUF_LEN - 1]; 102 seqp->ccid2s_prev = &seqp[CCID2_SEQBUF_LEN - 1];
103 103
104 /* This is the first allocation. Initiate the head and tail. */ 104 /* This is the first allocation. Initiate the head and tail. */
105 if (hctx->ccid2hctx_seqbufc == 0) 105 if (hc->tx_seqbufc == 0)
106 hctx->ccid2hctx_seqh = hctx->ccid2hctx_seqt = seqp; 106 hc->tx_seqh = hc->tx_seqt = seqp;
107 else { 107 else {
108 /* link the existing list with the one we just created */ 108 /* link the existing list with the one we just created */
109 hctx->ccid2hctx_seqh->ccid2s_next = seqp; 109 hc->tx_seqh->ccid2s_next = seqp;
110 seqp->ccid2s_prev = hctx->ccid2hctx_seqh; 110 seqp->ccid2s_prev = hc->tx_seqh;
111 111
112 hctx->ccid2hctx_seqt->ccid2s_prev = &seqp[CCID2_SEQBUF_LEN - 1]; 112 hc->tx_seqt->ccid2s_prev = &seqp[CCID2_SEQBUF_LEN - 1];
113 seqp[CCID2_SEQBUF_LEN - 1].ccid2s_next = hctx->ccid2hctx_seqt; 113 seqp[CCID2_SEQBUF_LEN - 1].ccid2s_next = hc->tx_seqt;
114 } 114 }
115 115
116 /* store the original pointer to the buffer so we can free it */ 116 /* store the original pointer to the buffer so we can free it */
117 hctx->ccid2hctx_seqbuf[hctx->ccid2hctx_seqbufc] = seqp; 117 hc->tx_seqbuf[hc->tx_seqbufc] = seqp;
118 hctx->ccid2hctx_seqbufc++; 118 hc->tx_seqbufc++;
119 119
120 return 0; 120 return 0;
121} 121}
122 122
123static int ccid2_hc_tx_send_packet(struct sock *sk, struct sk_buff *skb) 123static int ccid2_hc_tx_send_packet(struct sock *sk, struct sk_buff *skb)
124{ 124{
125 struct ccid2_hc_tx_sock *hctx = ccid2_hc_tx_sk(sk); 125 struct ccid2_hc_tx_sock *hc = ccid2_hc_tx_sk(sk);
126 126
127 if (hctx->ccid2hctx_pipe < hctx->ccid2hctx_cwnd) 127 if (hc->tx_pipe < hc->tx_cwnd)
128 return 0; 128 return 0;
129 129
130 return 1; /* XXX CCID should dequeue when ready instead of polling */ 130 return 1; /* XXX CCID should dequeue when ready instead of polling */
@@ -133,7 +133,7 @@ static int ccid2_hc_tx_send_packet(struct sock *sk, struct sk_buff *skb)
133static void ccid2_change_l_ack_ratio(struct sock *sk, u32 val) 133static void ccid2_change_l_ack_ratio(struct sock *sk, u32 val)
134{ 134{
135 struct dccp_sock *dp = dccp_sk(sk); 135 struct dccp_sock *dp = dccp_sk(sk);
136 u32 max_ratio = DIV_ROUND_UP(ccid2_hc_tx_sk(sk)->ccid2hctx_cwnd, 2); 136 u32 max_ratio = DIV_ROUND_UP(ccid2_hc_tx_sk(sk)->tx_cwnd, 2);
137 137
138 /* 138 /*
139 * Ensure that Ack Ratio does not exceed ceil(cwnd/2), which is (2) from 139 * Ensure that Ack Ratio does not exceed ceil(cwnd/2), which is (2) from
@@ -155,10 +155,10 @@ static void ccid2_change_l_ack_ratio(struct sock *sk, u32 val)
155 dp->dccps_l_ack_ratio = val; 155 dp->dccps_l_ack_ratio = val;
156} 156}
157 157
158static void ccid2_change_srtt(struct ccid2_hc_tx_sock *hctx, long val) 158static void ccid2_change_srtt(struct ccid2_hc_tx_sock *hc, long val)
159{ 159{
160 ccid2_pr_debug("change SRTT to %ld\n", val); 160 ccid2_pr_debug("change SRTT to %ld\n", val);
161 hctx->ccid2hctx_srtt = val; 161 hc->tx_srtt = val;
162} 162}
163 163
164static void ccid2_start_rto_timer(struct sock *sk); 164static void ccid2_start_rto_timer(struct sock *sk);
@@ -166,45 +166,44 @@ static void ccid2_start_rto_timer(struct sock *sk);
166static void ccid2_hc_tx_rto_expire(unsigned long data) 166static void ccid2_hc_tx_rto_expire(unsigned long data)
167{ 167{
168 struct sock *sk = (struct sock *)data; 168 struct sock *sk = (struct sock *)data;
169 struct ccid2_hc_tx_sock *hctx = ccid2_hc_tx_sk(sk); 169 struct ccid2_hc_tx_sock *hc = ccid2_hc_tx_sk(sk);
170 long s; 170 long s;
171 171
172 bh_lock_sock(sk); 172 bh_lock_sock(sk);
173 if (sock_owned_by_user(sk)) { 173 if (sock_owned_by_user(sk)) {
174 sk_reset_timer(sk, &hctx->ccid2hctx_rtotimer, 174 sk_reset_timer(sk, &hc->tx_rtotimer, jiffies + HZ / 5);
175 jiffies + HZ / 5);
176 goto out; 175 goto out;
177 } 176 }
178 177
179 ccid2_pr_debug("RTO_EXPIRE\n"); 178 ccid2_pr_debug("RTO_EXPIRE\n");
180 179
181 ccid2_hc_tx_check_sanity(hctx); 180 ccid2_hc_tx_check_sanity(hc);
182 181
183 /* back-off timer */ 182 /* back-off timer */
184 hctx->ccid2hctx_rto <<= 1; 183 hc->tx_rto <<= 1;
185 184
186 s = hctx->ccid2hctx_rto / HZ; 185 s = hc->tx_rto / HZ;
187 if (s > 60) 186 if (s > 60)
188 hctx->ccid2hctx_rto = 60 * HZ; 187 hc->tx_rto = 60 * HZ;
189 188
190 ccid2_start_rto_timer(sk); 189 ccid2_start_rto_timer(sk);
191 190
192 /* adjust pipe, cwnd etc */ 191 /* adjust pipe, cwnd etc */
193 hctx->ccid2hctx_ssthresh = hctx->ccid2hctx_cwnd / 2; 192 hc->tx_ssthresh = hc->tx_cwnd / 2;
194 if (hctx->ccid2hctx_ssthresh < 2) 193 if (hc->tx_ssthresh < 2)
195 hctx->ccid2hctx_ssthresh = 2; 194 hc->tx_ssthresh = 2;
196 hctx->ccid2hctx_cwnd = 1; 195 hc->tx_cwnd = 1;
197 hctx->ccid2hctx_pipe = 0; 196 hc->tx_pipe = 0;
198 197
199 /* clear state about stuff we sent */ 198 /* clear state about stuff we sent */
200 hctx->ccid2hctx_seqt = hctx->ccid2hctx_seqh; 199 hc->tx_seqt = hc->tx_seqh;
201 hctx->ccid2hctx_packets_acked = 0; 200 hc->tx_packets_acked = 0;
202 201
203 /* clear ack ratio state. */ 202 /* clear ack ratio state. */
204 hctx->ccid2hctx_rpseq = 0; 203 hc->tx_rpseq = 0;
205 hctx->ccid2hctx_rpdupack = -1; 204 hc->tx_rpdupack = -1;
206 ccid2_change_l_ack_ratio(sk, 1); 205 ccid2_change_l_ack_ratio(sk, 1);
207 ccid2_hc_tx_check_sanity(hctx); 206 ccid2_hc_tx_check_sanity(hc);
208out: 207out:
209 bh_unlock_sock(sk); 208 bh_unlock_sock(sk);
210 sock_put(sk); 209 sock_put(sk);
@@ -212,42 +211,40 @@ out:
212 211
213static void ccid2_start_rto_timer(struct sock *sk) 212static void ccid2_start_rto_timer(struct sock *sk)
214{ 213{
215 struct ccid2_hc_tx_sock *hctx = ccid2_hc_tx_sk(sk); 214 struct ccid2_hc_tx_sock *hc = ccid2_hc_tx_sk(sk);
216 215
217 ccid2_pr_debug("setting RTO timeout=%ld\n", hctx->ccid2hctx_rto); 216 ccid2_pr_debug("setting RTO timeout=%ld\n", hc->tx_rto);
218 217
219 BUG_ON(timer_pending(&hctx->ccid2hctx_rtotimer)); 218 BUG_ON(timer_pending(&hc->tx_rtotimer));
220 sk_reset_timer(sk, &hctx->ccid2hctx_rtotimer, 219 sk_reset_timer(sk, &hc->tx_rtotimer, jiffies + hc->tx_rto);
221 jiffies + hctx->ccid2hctx_rto);
222} 220}
223 221
224static void ccid2_hc_tx_packet_sent(struct sock *sk, int more, unsigned int len) 222static void ccid2_hc_tx_packet_sent(struct sock *sk, int more, unsigned int len)
225{ 223{
226 struct dccp_sock *dp = dccp_sk(sk); 224 struct dccp_sock *dp = dccp_sk(sk);
227 struct ccid2_hc_tx_sock *hctx = ccid2_hc_tx_sk(sk); 225 struct ccid2_hc_tx_sock *hc = ccid2_hc_tx_sk(sk);
228 struct ccid2_seq *next; 226 struct ccid2_seq *next;
229 227
230 hctx->ccid2hctx_pipe++; 228 hc->tx_pipe++;
231 229
232 hctx->ccid2hctx_seqh->ccid2s_seq = dp->dccps_gss; 230 hc->tx_seqh->ccid2s_seq = dp->dccps_gss;
233 hctx->ccid2hctx_seqh->ccid2s_acked = 0; 231 hc->tx_seqh->ccid2s_acked = 0;
234 hctx->ccid2hctx_seqh->ccid2s_sent = jiffies; 232 hc->tx_seqh->ccid2s_sent = jiffies;
235 233
236 next = hctx->ccid2hctx_seqh->ccid2s_next; 234 next = hc->tx_seqh->ccid2s_next;
237 /* check if we need to alloc more space */ 235 /* check if we need to alloc more space */
238 if (next == hctx->ccid2hctx_seqt) { 236 if (next == hc->tx_seqt) {
239 if (ccid2_hc_tx_alloc_seq(hctx)) { 237 if (ccid2_hc_tx_alloc_seq(hc)) {
240 DCCP_CRIT("packet history - out of memory!"); 238 DCCP_CRIT("packet history - out of memory!");
241 /* FIXME: find a more graceful way to bail out */ 239 /* FIXME: find a more graceful way to bail out */
242 return; 240 return;
243 } 241 }
244 next = hctx->ccid2hctx_seqh->ccid2s_next; 242 next = hc->tx_seqh->ccid2s_next;
245 BUG_ON(next == hctx->ccid2hctx_seqt); 243 BUG_ON(next == hc->tx_seqt);
246 } 244 }
247 hctx->ccid2hctx_seqh = next; 245 hc->tx_seqh = next;
248 246
249 ccid2_pr_debug("cwnd=%d pipe=%d\n", hctx->ccid2hctx_cwnd, 247 ccid2_pr_debug("cwnd=%d pipe=%d\n", hc->tx_cwnd, hc->tx_pipe);
250 hctx->ccid2hctx_pipe);
251 248
252 /* 249 /*
253 * FIXME: The code below is broken and the variables have been removed 250 * FIXME: The code below is broken and the variables have been removed
@@ -270,12 +267,12 @@ static void ccid2_hc_tx_packet_sent(struct sock *sk, int more, unsigned int len)
270 */ 267 */
271#if 0 268#if 0
272 /* Ack Ratio. Need to maintain a concept of how many windows we sent */ 269 /* Ack Ratio. Need to maintain a concept of how many windows we sent */
273 hctx->ccid2hctx_arsent++; 270 hc->tx_arsent++;
274 /* We had an ack loss in this window... */ 271 /* We had an ack loss in this window... */
275 if (hctx->ccid2hctx_ackloss) { 272 if (hc->tx_ackloss) {
276 if (hctx->ccid2hctx_arsent >= hctx->ccid2hctx_cwnd) { 273 if (hc->tx_arsent >= hc->tx_cwnd) {
277 hctx->ccid2hctx_arsent = 0; 274 hc->tx_arsent = 0;
278 hctx->ccid2hctx_ackloss = 0; 275 hc->tx_ackloss = 0;
279 } 276 }
280 } else { 277 } else {
281 /* No acks lost up to now... */ 278 /* No acks lost up to now... */
@@ -285,28 +282,28 @@ static void ccid2_hc_tx_packet_sent(struct sock *sk, int more, unsigned int len)
285 int denom = dp->dccps_l_ack_ratio * dp->dccps_l_ack_ratio - 282 int denom = dp->dccps_l_ack_ratio * dp->dccps_l_ack_ratio -
286 dp->dccps_l_ack_ratio; 283 dp->dccps_l_ack_ratio;
287 284
288 denom = hctx->ccid2hctx_cwnd * hctx->ccid2hctx_cwnd / denom; 285 denom = hc->tx_cwnd * hc->tx_cwnd / denom;
289 286
290 if (hctx->ccid2hctx_arsent >= denom) { 287 if (hc->tx_arsent >= denom) {
291 ccid2_change_l_ack_ratio(sk, dp->dccps_l_ack_ratio - 1); 288 ccid2_change_l_ack_ratio(sk, dp->dccps_l_ack_ratio - 1);
292 hctx->ccid2hctx_arsent = 0; 289 hc->tx_arsent = 0;
293 } 290 }
294 } else { 291 } else {
295 /* we can't increase ack ratio further [1] */ 292 /* we can't increase ack ratio further [1] */
296 hctx->ccid2hctx_arsent = 0; /* or maybe set it to cwnd*/ 293 hc->tx_arsent = 0; /* or maybe set it to cwnd*/
297 } 294 }
298 } 295 }
299#endif 296#endif
300 297
301 /* setup RTO timer */ 298 /* setup RTO timer */
302 if (!timer_pending(&hctx->ccid2hctx_rtotimer)) 299 if (!timer_pending(&hc->tx_rtotimer))
303 ccid2_start_rto_timer(sk); 300 ccid2_start_rto_timer(sk);
304 301
305#ifdef CONFIG_IP_DCCP_CCID2_DEBUG 302#ifdef CONFIG_IP_DCCP_CCID2_DEBUG
306 do { 303 do {
307 struct ccid2_seq *seqp = hctx->ccid2hctx_seqt; 304 struct ccid2_seq *seqp = hc->tx_seqt;
308 305
309 while (seqp != hctx->ccid2hctx_seqh) { 306 while (seqp != hc->tx_seqh) {
310 ccid2_pr_debug("out seq=%llu acked=%d time=%lu\n", 307 ccid2_pr_debug("out seq=%llu acked=%d time=%lu\n",
311 (unsigned long long)seqp->ccid2s_seq, 308 (unsigned long long)seqp->ccid2s_seq,
312 seqp->ccid2s_acked, seqp->ccid2s_sent); 309 seqp->ccid2s_acked, seqp->ccid2s_sent);
@@ -314,7 +311,7 @@ static void ccid2_hc_tx_packet_sent(struct sock *sk, int more, unsigned int len)
314 } 311 }
315 } while (0); 312 } while (0);
316 ccid2_pr_debug("=========\n"); 313 ccid2_pr_debug("=========\n");
317 ccid2_hc_tx_check_sanity(hctx); 314 ccid2_hc_tx_check_sanity(hc);
318#endif 315#endif
319} 316}
320 317
@@ -382,9 +379,9 @@ out_invalid_option:
382 379
383static void ccid2_hc_tx_kill_rto_timer(struct sock *sk) 380static void ccid2_hc_tx_kill_rto_timer(struct sock *sk)
384{ 381{
385 struct ccid2_hc_tx_sock *hctx = ccid2_hc_tx_sk(sk); 382 struct ccid2_hc_tx_sock *hc = ccid2_hc_tx_sk(sk);
386 383
387 sk_stop_timer(sk, &hctx->ccid2hctx_rtotimer); 384 sk_stop_timer(sk, &hc->tx_rtotimer);
388 ccid2_pr_debug("deleted RTO timer\n"); 385 ccid2_pr_debug("deleted RTO timer\n");
389} 386}
390 387
@@ -392,75 +389,75 @@ static inline void ccid2_new_ack(struct sock *sk,
392 struct ccid2_seq *seqp, 389 struct ccid2_seq *seqp,
393 unsigned int *maxincr) 390 unsigned int *maxincr)
394{ 391{
395 struct ccid2_hc_tx_sock *hctx = ccid2_hc_tx_sk(sk); 392 struct ccid2_hc_tx_sock *hc = ccid2_hc_tx_sk(sk);
396 393
397 if (hctx->ccid2hctx_cwnd < hctx->ccid2hctx_ssthresh) { 394 if (hc->tx_cwnd < hc->tx_ssthresh) {
398 if (*maxincr > 0 && ++hctx->ccid2hctx_packets_acked == 2) { 395 if (*maxincr > 0 && ++hc->tx_packets_acked == 2) {
399 hctx->ccid2hctx_cwnd += 1; 396 hc->tx_cwnd += 1;
400 *maxincr -= 1; 397 *maxincr -= 1;
401 hctx->ccid2hctx_packets_acked = 0; 398 hc->tx_packets_acked = 0;
402 } 399 }
403 } else if (++hctx->ccid2hctx_packets_acked >= hctx->ccid2hctx_cwnd) { 400 } else if (++hc->tx_packets_acked >= hc->tx_cwnd) {
404 hctx->ccid2hctx_cwnd += 1; 401 hc->tx_cwnd += 1;
405 hctx->ccid2hctx_packets_acked = 0; 402 hc->tx_packets_acked = 0;
406 } 403 }
407 404
408 /* update RTO */ 405 /* update RTO */
409 if (hctx->ccid2hctx_srtt == -1 || 406 if (hc->tx_srtt == -1 ||
410 time_after(jiffies, hctx->ccid2hctx_lastrtt + hctx->ccid2hctx_srtt)) { 407 time_after(jiffies, hc->tx_lastrtt + hc->tx_srtt)) {
411 unsigned long r = (long)jiffies - (long)seqp->ccid2s_sent; 408 unsigned long r = (long)jiffies - (long)seqp->ccid2s_sent;
412 int s; 409 int s;
413 410
414 /* first measurement */ 411 /* first measurement */
415 if (hctx->ccid2hctx_srtt == -1) { 412 if (hc->tx_srtt == -1) {
416 ccid2_pr_debug("R: %lu Time=%lu seq=%llu\n", 413 ccid2_pr_debug("R: %lu Time=%lu seq=%llu\n",
417 r, jiffies, 414 r, jiffies,
418 (unsigned long long)seqp->ccid2s_seq); 415 (unsigned long long)seqp->ccid2s_seq);
419 ccid2_change_srtt(hctx, r); 416 ccid2_change_srtt(hc, r);
420 hctx->ccid2hctx_rttvar = r >> 1; 417 hc->tx_rttvar = r >> 1;
421 } else { 418 } else {
422 /* RTTVAR */ 419 /* RTTVAR */
423 long tmp = hctx->ccid2hctx_srtt - r; 420 long tmp = hc->tx_srtt - r;
424 long srtt; 421 long srtt;
425 422
426 if (tmp < 0) 423 if (tmp < 0)
427 tmp *= -1; 424 tmp *= -1;
428 425
429 tmp >>= 2; 426 tmp >>= 2;
430 hctx->ccid2hctx_rttvar *= 3; 427 hc->tx_rttvar *= 3;
431 hctx->ccid2hctx_rttvar >>= 2; 428 hc->tx_rttvar >>= 2;
432 hctx->ccid2hctx_rttvar += tmp; 429 hc->tx_rttvar += tmp;
433 430
434 /* SRTT */ 431 /* SRTT */
435 srtt = hctx->ccid2hctx_srtt; 432 srtt = hc->tx_srtt;
436 srtt *= 7; 433 srtt *= 7;
437 srtt >>= 3; 434 srtt >>= 3;
438 tmp = r >> 3; 435 tmp = r >> 3;
439 srtt += tmp; 436 srtt += tmp;
440 ccid2_change_srtt(hctx, srtt); 437 ccid2_change_srtt(hc, srtt);
441 } 438 }
442 s = hctx->ccid2hctx_rttvar << 2; 439 s = hc->tx_rttvar << 2;
443 /* clock granularity is 1 when based on jiffies */ 440 /* clock granularity is 1 when based on jiffies */
444 if (!s) 441 if (!s)
445 s = 1; 442 s = 1;
446 hctx->ccid2hctx_rto = hctx->ccid2hctx_srtt + s; 443 hc->tx_rto = hc->tx_srtt + s;
447 444
448 /* must be at least a second */ 445 /* must be at least a second */
449 s = hctx->ccid2hctx_rto / HZ; 446 s = hc->tx_rto / HZ;
450 /* DCCP doesn't require this [but I like it cuz my code sux] */ 447 /* DCCP doesn't require this [but I like it cuz my code sux] */
451#if 1 448#if 1
452 if (s < 1) 449 if (s < 1)
453 hctx->ccid2hctx_rto = HZ; 450 hc->tx_rto = HZ;
454#endif 451#endif
455 /* max 60 seconds */ 452 /* max 60 seconds */
456 if (s > 60) 453 if (s > 60)
457 hctx->ccid2hctx_rto = HZ * 60; 454 hc->tx_rto = HZ * 60;
458 455
459 hctx->ccid2hctx_lastrtt = jiffies; 456 hc->tx_lastrtt = jiffies;
460 457
461 ccid2_pr_debug("srtt: %ld rttvar: %ld rto: %ld (HZ=%d) R=%lu\n", 458 ccid2_pr_debug("srtt: %ld rttvar: %ld rto: %ld (HZ=%d) R=%lu\n",
462 hctx->ccid2hctx_srtt, hctx->ccid2hctx_rttvar, 459 hc->tx_srtt, hc->tx_rttvar,
463 hctx->ccid2hctx_rto, HZ, r); 460 hc->tx_rto, HZ, r);
464 } 461 }
465 462
466 /* we got a new ack, so re-start RTO timer */ 463 /* we got a new ack, so re-start RTO timer */
@@ -470,40 +467,40 @@ static inline void ccid2_new_ack(struct sock *sk,
470 467
471static void ccid2_hc_tx_dec_pipe(struct sock *sk) 468static void ccid2_hc_tx_dec_pipe(struct sock *sk)
472{ 469{
473 struct ccid2_hc_tx_sock *hctx = ccid2_hc_tx_sk(sk); 470 struct ccid2_hc_tx_sock *hc = ccid2_hc_tx_sk(sk);
474 471
475 if (hctx->ccid2hctx_pipe == 0) 472 if (hc->tx_pipe == 0)
476 DCCP_BUG("pipe == 0"); 473 DCCP_BUG("pipe == 0");
477 else 474 else
478 hctx->ccid2hctx_pipe--; 475 hc->tx_pipe--;
479 476
480 if (hctx->ccid2hctx_pipe == 0) 477 if (hc->tx_pipe == 0)
481 ccid2_hc_tx_kill_rto_timer(sk); 478 ccid2_hc_tx_kill_rto_timer(sk);
482} 479}
483 480
484static void ccid2_congestion_event(struct sock *sk, struct ccid2_seq *seqp) 481static void ccid2_congestion_event(struct sock *sk, struct ccid2_seq *seqp)
485{ 482{
486 struct ccid2_hc_tx_sock *hctx = ccid2_hc_tx_sk(sk); 483 struct ccid2_hc_tx_sock *hc = ccid2_hc_tx_sk(sk);
487 484
488 if (time_before(seqp->ccid2s_sent, hctx->ccid2hctx_last_cong)) { 485 if (time_before(seqp->ccid2s_sent, hc->tx_last_cong)) {
489 ccid2_pr_debug("Multiple losses in an RTT---treating as one\n"); 486 ccid2_pr_debug("Multiple losses in an RTT---treating as one\n");
490 return; 487 return;
491 } 488 }
492 489
493 hctx->ccid2hctx_last_cong = jiffies; 490 hc->tx_last_cong = jiffies;
494 491
495 hctx->ccid2hctx_cwnd = hctx->ccid2hctx_cwnd / 2 ? : 1U; 492 hc->tx_cwnd = hc->tx_cwnd / 2 ? : 1U;
496 hctx->ccid2hctx_ssthresh = max(hctx->ccid2hctx_cwnd, 2U); 493 hc->tx_ssthresh = max(hc->tx_cwnd, 2U);
497 494
498 /* Avoid spurious timeouts resulting from Ack Ratio > cwnd */ 495 /* Avoid spurious timeouts resulting from Ack Ratio > cwnd */
499 if (dccp_sk(sk)->dccps_l_ack_ratio > hctx->ccid2hctx_cwnd) 496 if (dccp_sk(sk)->dccps_l_ack_ratio > hc->tx_cwnd)
500 ccid2_change_l_ack_ratio(sk, hctx->ccid2hctx_cwnd); 497 ccid2_change_l_ack_ratio(sk, hc->tx_cwnd);
501} 498}
502 499
503static void ccid2_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb) 500static void ccid2_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb)
504{ 501{
505 struct dccp_sock *dp = dccp_sk(sk); 502 struct dccp_sock *dp = dccp_sk(sk);
506 struct ccid2_hc_tx_sock *hctx = ccid2_hc_tx_sk(sk); 503 struct ccid2_hc_tx_sock *hc = ccid2_hc_tx_sk(sk);
507 u64 ackno, seqno; 504 u64 ackno, seqno;
508 struct ccid2_seq *seqp; 505 struct ccid2_seq *seqp;
509 unsigned char *vector; 506 unsigned char *vector;
@@ -512,7 +509,7 @@ static void ccid2_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb)
512 int done = 0; 509 int done = 0;
513 unsigned int maxincr = 0; 510 unsigned int maxincr = 0;
514 511
515 ccid2_hc_tx_check_sanity(hctx); 512 ccid2_hc_tx_check_sanity(hc);
516 /* check reverse path congestion */ 513 /* check reverse path congestion */
517 seqno = DCCP_SKB_CB(skb)->dccpd_seq; 514 seqno = DCCP_SKB_CB(skb)->dccpd_seq;
518 515
@@ -521,21 +518,21 @@ static void ccid2_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb)
521 * -sorbo. 518 * -sorbo.
522 */ 519 */
523 /* need to bootstrap */ 520 /* need to bootstrap */
524 if (hctx->ccid2hctx_rpdupack == -1) { 521 if (hc->tx_rpdupack == -1) {
525 hctx->ccid2hctx_rpdupack = 0; 522 hc->tx_rpdupack = 0;
526 hctx->ccid2hctx_rpseq = seqno; 523 hc->tx_rpseq = seqno;
527 } else { 524 } else {
528 /* check if packet is consecutive */ 525 /* check if packet is consecutive */
529 if (dccp_delta_seqno(hctx->ccid2hctx_rpseq, seqno) == 1) 526 if (dccp_delta_seqno(hc->tx_rpseq, seqno) == 1)
530 hctx->ccid2hctx_rpseq = seqno; 527 hc->tx_rpseq = seqno;
531 /* it's a later packet */ 528 /* it's a later packet */
532 else if (after48(seqno, hctx->ccid2hctx_rpseq)) { 529 else if (after48(seqno, hc->tx_rpseq)) {
533 hctx->ccid2hctx_rpdupack++; 530 hc->tx_rpdupack++;
534 531
535 /* check if we got enough dupacks */ 532 /* check if we got enough dupacks */
536 if (hctx->ccid2hctx_rpdupack >= NUMDUPACK) { 533 if (hc->tx_rpdupack >= NUMDUPACK) {
537 hctx->ccid2hctx_rpdupack = -1; /* XXX lame */ 534 hc->tx_rpdupack = -1; /* XXX lame */
538 hctx->ccid2hctx_rpseq = 0; 535 hc->tx_rpseq = 0;
539 536
540 ccid2_change_l_ack_ratio(sk, 2 * dp->dccps_l_ack_ratio); 537 ccid2_change_l_ack_ratio(sk, 2 * dp->dccps_l_ack_ratio);
541 } 538 }
@@ -544,7 +541,7 @@ static void ccid2_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb)
544 541
545 /* check forward path congestion */ 542 /* check forward path congestion */
546 /* still didn't send out new data packets */ 543 /* still didn't send out new data packets */
547 if (hctx->ccid2hctx_seqh == hctx->ccid2hctx_seqt) 544 if (hc->tx_seqh == hc->tx_seqt)
548 return; 545 return;
549 546
550 switch (DCCP_SKB_CB(skb)->dccpd_type) { 547 switch (DCCP_SKB_CB(skb)->dccpd_type) {
@@ -556,14 +553,14 @@ static void ccid2_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb)
556 } 553 }
557 554
558 ackno = DCCP_SKB_CB(skb)->dccpd_ack_seq; 555 ackno = DCCP_SKB_CB(skb)->dccpd_ack_seq;
559 if (after48(ackno, hctx->ccid2hctx_high_ack)) 556 if (after48(ackno, hc->tx_high_ack))
560 hctx->ccid2hctx_high_ack = ackno; 557 hc->tx_high_ack = ackno;
561 558
562 seqp = hctx->ccid2hctx_seqt; 559 seqp = hc->tx_seqt;
563 while (before48(seqp->ccid2s_seq, ackno)) { 560 while (before48(seqp->ccid2s_seq, ackno)) {
564 seqp = seqp->ccid2s_next; 561 seqp = seqp->ccid2s_next;
565 if (seqp == hctx->ccid2hctx_seqh) { 562 if (seqp == hc->tx_seqh) {
566 seqp = hctx->ccid2hctx_seqh->ccid2s_prev; 563 seqp = hc->tx_seqh->ccid2s_prev;
567 break; 564 break;
568 } 565 }
569 } 566 }
@@ -573,7 +570,7 @@ static void ccid2_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb)
573 * packets per acknowledgement. Rounding up avoids that cwnd is not 570 * packets per acknowledgement. Rounding up avoids that cwnd is not
574 * advanced when Ack Ratio is 1 and gives a slight edge otherwise. 571 * advanced when Ack Ratio is 1 and gives a slight edge otherwise.
575 */ 572 */
576 if (hctx->ccid2hctx_cwnd < hctx->ccid2hctx_ssthresh) 573 if (hc->tx_cwnd < hc->tx_ssthresh)
577 maxincr = DIV_ROUND_UP(dp->dccps_l_ack_ratio, 2); 574 maxincr = DIV_ROUND_UP(dp->dccps_l_ack_ratio, 2);
578 575
579 /* go through all ack vectors */ 576 /* go through all ack vectors */
@@ -592,7 +589,7 @@ static void ccid2_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb)
592 * seqnos. 589 * seqnos.
593 */ 590 */
594 while (after48(seqp->ccid2s_seq, ackno)) { 591 while (after48(seqp->ccid2s_seq, ackno)) {
595 if (seqp == hctx->ccid2hctx_seqt) { 592 if (seqp == hc->tx_seqt) {
596 done = 1; 593 done = 1;
597 break; 594 break;
598 } 595 }
@@ -624,7 +621,7 @@ static void ccid2_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb)
624 (unsigned long long)seqp->ccid2s_seq); 621 (unsigned long long)seqp->ccid2s_seq);
625 ccid2_hc_tx_dec_pipe(sk); 622 ccid2_hc_tx_dec_pipe(sk);
626 } 623 }
627 if (seqp == hctx->ccid2hctx_seqt) { 624 if (seqp == hc->tx_seqt) {
628 done = 1; 625 done = 1;
629 break; 626 break;
630 } 627 }
@@ -643,11 +640,11 @@ static void ccid2_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb)
643 /* The state about what is acked should be correct now 640 /* The state about what is acked should be correct now
644 * Check for NUMDUPACK 641 * Check for NUMDUPACK
645 */ 642 */
646 seqp = hctx->ccid2hctx_seqt; 643 seqp = hc->tx_seqt;
647 while (before48(seqp->ccid2s_seq, hctx->ccid2hctx_high_ack)) { 644 while (before48(seqp->ccid2s_seq, hc->tx_high_ack)) {
648 seqp = seqp->ccid2s_next; 645 seqp = seqp->ccid2s_next;
649 if (seqp == hctx->ccid2hctx_seqh) { 646 if (seqp == hc->tx_seqh) {
650 seqp = hctx->ccid2hctx_seqh->ccid2s_prev; 647 seqp = hc->tx_seqh->ccid2s_prev;
651 break; 648 break;
652 } 649 }
653 } 650 }
@@ -658,7 +655,7 @@ static void ccid2_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb)
658 if (done == NUMDUPACK) 655 if (done == NUMDUPACK)
659 break; 656 break;
660 } 657 }
661 if (seqp == hctx->ccid2hctx_seqt) 658 if (seqp == hc->tx_seqt)
662 break; 659 break;
663 seqp = seqp->ccid2s_prev; 660 seqp = seqp->ccid2s_prev;
664 } 661 }
@@ -681,86 +678,86 @@ static void ccid2_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb)
681 ccid2_congestion_event(sk, seqp); 678 ccid2_congestion_event(sk, seqp);
682 ccid2_hc_tx_dec_pipe(sk); 679 ccid2_hc_tx_dec_pipe(sk);
683 } 680 }
684 if (seqp == hctx->ccid2hctx_seqt) 681 if (seqp == hc->tx_seqt)
685 break; 682 break;
686 seqp = seqp->ccid2s_prev; 683 seqp = seqp->ccid2s_prev;
687 } 684 }
688 685
689 hctx->ccid2hctx_seqt = last_acked; 686 hc->tx_seqt = last_acked;
690 } 687 }
691 688
692 /* trim acked packets in tail */ 689 /* trim acked packets in tail */
693 while (hctx->ccid2hctx_seqt != hctx->ccid2hctx_seqh) { 690 while (hc->tx_seqt != hc->tx_seqh) {
694 if (!hctx->ccid2hctx_seqt->ccid2s_acked) 691 if (!hc->tx_seqt->ccid2s_acked)
695 break; 692 break;
696 693
697 hctx->ccid2hctx_seqt = hctx->ccid2hctx_seqt->ccid2s_next; 694 hc->tx_seqt = hc->tx_seqt->ccid2s_next;
698 } 695 }
699 696
700 ccid2_hc_tx_check_sanity(hctx); 697 ccid2_hc_tx_check_sanity(hc);
701} 698}
702 699
703static int ccid2_hc_tx_init(struct ccid *ccid, struct sock *sk) 700static int ccid2_hc_tx_init(struct ccid *ccid, struct sock *sk)
704{ 701{
705 struct ccid2_hc_tx_sock *hctx = ccid_priv(ccid); 702 struct ccid2_hc_tx_sock *hc = ccid_priv(ccid);
706 struct dccp_sock *dp = dccp_sk(sk); 703 struct dccp_sock *dp = dccp_sk(sk);
707 u32 max_ratio; 704 u32 max_ratio;
708 705
709 /* RFC 4341, 5: initialise ssthresh to arbitrarily high (max) value */ 706 /* RFC 4341, 5: initialise ssthresh to arbitrarily high (max) value */
710 hctx->ccid2hctx_ssthresh = ~0U; 707 hc->tx_ssthresh = ~0U;
711 708
712 /* 709 /*
713 * RFC 4341, 5: "The cwnd parameter is initialized to at most four 710 * RFC 4341, 5: "The cwnd parameter is initialized to at most four
714 * packets for new connections, following the rules from [RFC3390]". 711 * packets for new connections, following the rules from [RFC3390]".
715 * We need to convert the bytes of RFC3390 into the packets of RFC 4341. 712 * We need to convert the bytes of RFC3390 into the packets of RFC 4341.
716 */ 713 */
717 hctx->ccid2hctx_cwnd = clamp(4380U / dp->dccps_mss_cache, 2U, 4U); 714 hc->tx_cwnd = clamp(4380U / dp->dccps_mss_cache, 2U, 4U);
718 715
719 /* Make sure that Ack Ratio is enabled and within bounds. */ 716 /* Make sure that Ack Ratio is enabled and within bounds. */
720 max_ratio = DIV_ROUND_UP(hctx->ccid2hctx_cwnd, 2); 717 max_ratio = DIV_ROUND_UP(hc->tx_cwnd, 2);
721 if (dp->dccps_l_ack_ratio == 0 || dp->dccps_l_ack_ratio > max_ratio) 718 if (dp->dccps_l_ack_ratio == 0 || dp->dccps_l_ack_ratio > max_ratio)
722 dp->dccps_l_ack_ratio = max_ratio; 719 dp->dccps_l_ack_ratio = max_ratio;
723 720
724 /* XXX init ~ to window size... */ 721 /* XXX init ~ to window size... */
725 if (ccid2_hc_tx_alloc_seq(hctx)) 722 if (ccid2_hc_tx_alloc_seq(hc))
726 return -ENOMEM; 723 return -ENOMEM;
727 724
728 hctx->ccid2hctx_rto = 3 * HZ; 725 hc->tx_rto = 3 * HZ;
729 ccid2_change_srtt(hctx, -1); 726 ccid2_change_srtt(hc, -1);
730 hctx->ccid2hctx_rttvar = -1; 727 hc->tx_rttvar = -1;
731 hctx->ccid2hctx_rpdupack = -1; 728 hc->tx_rpdupack = -1;
732 hctx->ccid2hctx_last_cong = jiffies; 729 hc->tx_last_cong = jiffies;
733 setup_timer(&hctx->ccid2hctx_rtotimer, ccid2_hc_tx_rto_expire, 730 setup_timer(&hc->tx_rtotimer, ccid2_hc_tx_rto_expire,
734 (unsigned long)sk); 731 (unsigned long)sk);
735 732
736 ccid2_hc_tx_check_sanity(hctx); 733 ccid2_hc_tx_check_sanity(hc);
737 return 0; 734 return 0;
738} 735}
739 736
740static void ccid2_hc_tx_exit(struct sock *sk) 737static void ccid2_hc_tx_exit(struct sock *sk)
741{ 738{
742 struct ccid2_hc_tx_sock *hctx = ccid2_hc_tx_sk(sk); 739 struct ccid2_hc_tx_sock *hc = ccid2_hc_tx_sk(sk);
743 int i; 740 int i;
744 741
745 ccid2_hc_tx_kill_rto_timer(sk); 742 ccid2_hc_tx_kill_rto_timer(sk);
746 743
747 for (i = 0; i < hctx->ccid2hctx_seqbufc; i++) 744 for (i = 0; i < hc->tx_seqbufc; i++)
748 kfree(hctx->ccid2hctx_seqbuf[i]); 745 kfree(hc->tx_seqbuf[i]);
749 hctx->ccid2hctx_seqbufc = 0; 746 hc->tx_seqbufc = 0;
750} 747}
751 748
752static void ccid2_hc_rx_packet_recv(struct sock *sk, struct sk_buff *skb) 749static void ccid2_hc_rx_packet_recv(struct sock *sk, struct sk_buff *skb)
753{ 750{
754 const struct dccp_sock *dp = dccp_sk(sk); 751 const struct dccp_sock *dp = dccp_sk(sk);
755 struct ccid2_hc_rx_sock *hcrx = ccid2_hc_rx_sk(sk); 752 struct ccid2_hc_rx_sock *hc = ccid2_hc_rx_sk(sk);
756 753
757 switch (DCCP_SKB_CB(skb)->dccpd_type) { 754 switch (DCCP_SKB_CB(skb)->dccpd_type) {
758 case DCCP_PKT_DATA: 755 case DCCP_PKT_DATA:
759 case DCCP_PKT_DATAACK: 756 case DCCP_PKT_DATAACK:
760 hcrx->ccid2hcrx_data++; 757 hc->rx_data++;
761 if (hcrx->ccid2hcrx_data >= dp->dccps_r_ack_ratio) { 758 if (hc->rx_data >= dp->dccps_r_ack_ratio) {
762 dccp_send_ack(sk); 759 dccp_send_ack(sk);
763 hcrx->ccid2hcrx_data = 0; 760 hc->rx_data = 0;
764 } 761 }
765 break; 762 break;
766 } 763 }
diff --git a/net/dccp/ccids/ccid2.h b/net/dccp/ccids/ccid2.h
index 326ac90fb909..1ec6a30103bb 100644
--- a/net/dccp/ccids/ccid2.h
+++ b/net/dccp/ccids/ccid2.h
@@ -40,34 +40,34 @@ struct ccid2_seq {
40 40
41/** 41/**
42 * struct ccid2_hc_tx_sock - CCID2 TX half connection 42 * struct ccid2_hc_tx_sock - CCID2 TX half connection
43 * @ccid2hctx_{cwnd,ssthresh,pipe}: as per RFC 4341, section 5 43 * @tx_{cwnd,ssthresh,pipe}: as per RFC 4341, section 5
44 * @ccid2hctx_packets_acked - Ack counter for deriving cwnd growth (RFC 3465) 44 * @tx_packets_acked: Ack counter for deriving cwnd growth (RFC 3465)
45 * @ccid2hctx_lastrtt -time RTT was last measured 45 * @tx_lastrtt: time RTT was last measured
46 * @ccid2hctx_rpseq - last consecutive seqno 46 * @tx_rpseq: last consecutive seqno
47 * @ccid2hctx_rpdupack - dupacks since rpseq 47 * @tx_rpdupack: dupacks since rpseq
48 */ 48 */
49struct ccid2_hc_tx_sock { 49struct ccid2_hc_tx_sock {
50 u32 ccid2hctx_cwnd; 50 u32 tx_cwnd;
51 u32 ccid2hctx_ssthresh; 51 u32 tx_ssthresh;
52 u32 ccid2hctx_pipe; 52 u32 tx_pipe;
53 u32 ccid2hctx_packets_acked; 53 u32 tx_packets_acked;
54 struct ccid2_seq *ccid2hctx_seqbuf[CCID2_SEQBUF_MAX]; 54 struct ccid2_seq *tx_seqbuf[CCID2_SEQBUF_MAX];
55 int ccid2hctx_seqbufc; 55 int tx_seqbufc;
56 struct ccid2_seq *ccid2hctx_seqh; 56 struct ccid2_seq *tx_seqh;
57 struct ccid2_seq *ccid2hctx_seqt; 57 struct ccid2_seq *tx_seqt;
58 long ccid2hctx_rto; 58 long tx_rto;
59 long ccid2hctx_srtt; 59 long tx_srtt;
60 long ccid2hctx_rttvar; 60 long tx_rttvar;
61 unsigned long ccid2hctx_lastrtt; 61 unsigned long tx_lastrtt;
62 struct timer_list ccid2hctx_rtotimer; 62 struct timer_list tx_rtotimer;
63 u64 ccid2hctx_rpseq; 63 u64 tx_rpseq;
64 int ccid2hctx_rpdupack; 64 int tx_rpdupack;
65 unsigned long ccid2hctx_last_cong; 65 unsigned long tx_last_cong;
66 u64 ccid2hctx_high_ack; 66 u64 tx_high_ack;
67}; 67};
68 68
69struct ccid2_hc_rx_sock { 69struct ccid2_hc_rx_sock {
70 int ccid2hcrx_data; 70 int rx_data;
71}; 71};
72 72
73static inline struct ccid2_hc_tx_sock *ccid2_hc_tx_sk(const struct sock *sk) 73static inline struct ccid2_hc_tx_sock *ccid2_hc_tx_sk(const struct sock *sk)
diff --git a/net/dccp/ccids/ccid3.c b/net/dccp/ccids/ccid3.c
index 34dcc798c457..bcd7632299f5 100644
--- a/net/dccp/ccids/ccid3.c
+++ b/net/dccp/ccids/ccid3.c
@@ -64,14 +64,14 @@ static const char *ccid3_tx_state_name(enum ccid3_hc_tx_states state)
64static void ccid3_hc_tx_set_state(struct sock *sk, 64static void ccid3_hc_tx_set_state(struct sock *sk,
65 enum ccid3_hc_tx_states state) 65 enum ccid3_hc_tx_states state)
66{ 66{
67 struct ccid3_hc_tx_sock *hctx = ccid3_hc_tx_sk(sk); 67 struct ccid3_hc_tx_sock *hc = ccid3_hc_tx_sk(sk);
68 enum ccid3_hc_tx_states oldstate = hctx->ccid3hctx_state; 68 enum ccid3_hc_tx_states oldstate = hc->tx_state;
69 69
70 ccid3_pr_debug("%s(%p) %-8.8s -> %s\n", 70 ccid3_pr_debug("%s(%p) %-8.8s -> %s\n",
71 dccp_role(sk), sk, ccid3_tx_state_name(oldstate), 71 dccp_role(sk), sk, ccid3_tx_state_name(oldstate),
72 ccid3_tx_state_name(state)); 72 ccid3_tx_state_name(state));
73 WARN_ON(state == oldstate); 73 WARN_ON(state == oldstate);
74 hctx->ccid3hctx_state = state; 74 hc->tx_state = state;
75} 75}
76 76
77/* 77/*
@@ -85,37 +85,32 @@ static void ccid3_hc_tx_set_state(struct sock *sk,
85 */ 85 */
86static inline u64 rfc3390_initial_rate(struct sock *sk) 86static inline u64 rfc3390_initial_rate(struct sock *sk)
87{ 87{
88 const struct ccid3_hc_tx_sock *hctx = ccid3_hc_tx_sk(sk); 88 const struct ccid3_hc_tx_sock *hc = ccid3_hc_tx_sk(sk);
89 const __u32 w_init = clamp_t(__u32, 4380U, 89 const __u32 w_init = clamp_t(__u32, 4380U, 2 * hc->tx_s, 4 * hc->tx_s);
90 2 * hctx->ccid3hctx_s, 4 * hctx->ccid3hctx_s);
91 90
92 return scaled_div(w_init << 6, hctx->ccid3hctx_rtt); 91 return scaled_div(w_init << 6, hc->tx_rtt);
93} 92}
94 93
95/* 94/*
96 * Recalculate t_ipi and delta (should be called whenever X changes) 95 * Recalculate t_ipi and delta (should be called whenever X changes)
97 */ 96 */
98static void ccid3_update_send_interval(struct ccid3_hc_tx_sock *hctx) 97static void ccid3_update_send_interval(struct ccid3_hc_tx_sock *hc)
99{ 98{
100 /* Calculate new t_ipi = s / X_inst (X_inst is in 64 * bytes/second) */ 99 /* Calculate new t_ipi = s / X_inst (X_inst is in 64 * bytes/second) */
101 hctx->ccid3hctx_t_ipi = scaled_div32(((u64)hctx->ccid3hctx_s) << 6, 100 hc->tx_t_ipi = scaled_div32(((u64)hc->tx_s) << 6, hc->tx_x);
102 hctx->ccid3hctx_x);
103 101
104 /* Calculate new delta by delta = min(t_ipi / 2, t_gran / 2) */ 102 /* Calculate new delta by delta = min(t_ipi / 2, t_gran / 2) */
105 hctx->ccid3hctx_delta = min_t(u32, hctx->ccid3hctx_t_ipi / 2, 103 hc->tx_delta = min_t(u32, hc->tx_t_ipi / 2, TFRC_OPSYS_HALF_TIME_GRAN);
106 TFRC_OPSYS_HALF_TIME_GRAN);
107
108 ccid3_pr_debug("t_ipi=%u, delta=%u, s=%u, X=%u\n",
109 hctx->ccid3hctx_t_ipi, hctx->ccid3hctx_delta,
110 hctx->ccid3hctx_s, (unsigned)(hctx->ccid3hctx_x >> 6));
111 104
105 ccid3_pr_debug("t_ipi=%u, delta=%u, s=%u, X=%u\n", hc->tx_t_ipi,
106 hc->tx_delta, hc->tx_s, (unsigned)(hc->tx_x >> 6));
112} 107}
113 108
114static u32 ccid3_hc_tx_idle_rtt(struct ccid3_hc_tx_sock *hctx, ktime_t now) 109static u32 ccid3_hc_tx_idle_rtt(struct ccid3_hc_tx_sock *hc, ktime_t now)
115{ 110{
116 u32 delta = ktime_us_delta(now, hctx->ccid3hctx_t_last_win_count); 111 u32 delta = ktime_us_delta(now, hc->tx_t_last_win_count);
117 112
118 return delta / hctx->ccid3hctx_rtt; 113 return delta / hc->tx_rtt;
119} 114}
120 115
121/** 116/**
@@ -130,9 +125,9 @@ static u32 ccid3_hc_tx_idle_rtt(struct ccid3_hc_tx_sock *hctx, ktime_t now)
130 */ 125 */
131static void ccid3_hc_tx_update_x(struct sock *sk, ktime_t *stamp) 126static void ccid3_hc_tx_update_x(struct sock *sk, ktime_t *stamp)
132{ 127{
133 struct ccid3_hc_tx_sock *hctx = ccid3_hc_tx_sk(sk); 128 struct ccid3_hc_tx_sock *hc = ccid3_hc_tx_sk(sk);
134 __u64 min_rate = 2 * hctx->ccid3hctx_x_recv; 129 __u64 min_rate = 2 * hc->tx_x_recv;
135 const __u64 old_x = hctx->ccid3hctx_x; 130 const __u64 old_x = hc->tx_x;
136 ktime_t now = stamp ? *stamp : ktime_get_real(); 131 ktime_t now = stamp ? *stamp : ktime_get_real();
137 132
138 /* 133 /*
@@ -141,37 +136,31 @@ static void ccid3_hc_tx_update_x(struct sock *sk, ktime_t *stamp)
141 * a sender is idle if it has not sent anything over a 2-RTT-period. 136 * a sender is idle if it has not sent anything over a 2-RTT-period.
142 * For consistency with X and X_recv, min_rate is also scaled by 2^6. 137 * For consistency with X and X_recv, min_rate is also scaled by 2^6.
143 */ 138 */
144 if (ccid3_hc_tx_idle_rtt(hctx, now) >= 2) { 139 if (ccid3_hc_tx_idle_rtt(hc, now) >= 2) {
145 min_rate = rfc3390_initial_rate(sk); 140 min_rate = rfc3390_initial_rate(sk);
146 min_rate = max(min_rate, 2 * hctx->ccid3hctx_x_recv); 141 min_rate = max(min_rate, 2 * hc->tx_x_recv);
147 } 142 }
148 143
149 if (hctx->ccid3hctx_p > 0) { 144 if (hc->tx_p > 0) {
150 145
151 hctx->ccid3hctx_x = min(((__u64)hctx->ccid3hctx_x_calc) << 6, 146 hc->tx_x = min(((__u64)hc->tx_x_calc) << 6, min_rate);
152 min_rate); 147 hc->tx_x = max(hc->tx_x, (((__u64)hc->tx_s) << 6) / TFRC_T_MBI);
153 hctx->ccid3hctx_x = max(hctx->ccid3hctx_x,
154 (((__u64)hctx->ccid3hctx_s) << 6) /
155 TFRC_T_MBI);
156 148
157 } else if (ktime_us_delta(now, hctx->ccid3hctx_t_ld) 149 } else if (ktime_us_delta(now, hc->tx_t_ld) - (s64)hc->tx_rtt >= 0) {
158 - (s64)hctx->ccid3hctx_rtt >= 0) {
159 150
160 hctx->ccid3hctx_x = min(2 * hctx->ccid3hctx_x, min_rate); 151 hc->tx_x = min(2 * hc->tx_x, min_rate);
161 hctx->ccid3hctx_x = max(hctx->ccid3hctx_x, 152 hc->tx_x = max(hc->tx_x,
162 scaled_div(((__u64)hctx->ccid3hctx_s) << 6, 153 scaled_div(((__u64)hc->tx_s) << 6, hc->tx_rtt));
163 hctx->ccid3hctx_rtt)); 154 hc->tx_t_ld = now;
164 hctx->ccid3hctx_t_ld = now;
165 } 155 }
166 156
167 if (hctx->ccid3hctx_x != old_x) { 157 if (hc->tx_x != old_x) {
168 ccid3_pr_debug("X_prev=%u, X_now=%u, X_calc=%u, " 158 ccid3_pr_debug("X_prev=%u, X_now=%u, X_calc=%u, "
169 "X_recv=%u\n", (unsigned)(old_x >> 6), 159 "X_recv=%u\n", (unsigned)(old_x >> 6),
170 (unsigned)(hctx->ccid3hctx_x >> 6), 160 (unsigned)(hc->tx_x >> 6), hc->tx_x_calc,
171 hctx->ccid3hctx_x_calc, 161 (unsigned)(hc->tx_x_recv >> 6));
172 (unsigned)(hctx->ccid3hctx_x_recv >> 6));
173 162
174 ccid3_update_send_interval(hctx); 163 ccid3_update_send_interval(hc);
175 } 164 }
176} 165}
177 166
@@ -179,37 +168,37 @@ static void ccid3_hc_tx_update_x(struct sock *sk, ktime_t *stamp)
179 * Track the mean packet size `s' (cf. RFC 4342, 5.3 and RFC 3448, 4.1) 168 * Track the mean packet size `s' (cf. RFC 4342, 5.3 and RFC 3448, 4.1)
180 * @len: DCCP packet payload size in bytes 169 * @len: DCCP packet payload size in bytes
181 */ 170 */
182static inline void ccid3_hc_tx_update_s(struct ccid3_hc_tx_sock *hctx, int len) 171static inline void ccid3_hc_tx_update_s(struct ccid3_hc_tx_sock *hc, int len)
183{ 172{
184 const u16 old_s = hctx->ccid3hctx_s; 173 const u16 old_s = hc->tx_s;
185 174
186 hctx->ccid3hctx_s = tfrc_ewma(hctx->ccid3hctx_s, len, 9); 175 hc->tx_s = tfrc_ewma(hc->tx_s, len, 9);
187 176
188 if (hctx->ccid3hctx_s != old_s) 177 if (hc->tx_s != old_s)
189 ccid3_update_send_interval(hctx); 178 ccid3_update_send_interval(hc);
190} 179}
191 180
192/* 181/*
193 * Update Window Counter using the algorithm from [RFC 4342, 8.1]. 182 * Update Window Counter using the algorithm from [RFC 4342, 8.1].
194 * As elsewhere, RTT > 0 is assumed by using dccp_sample_rtt(). 183 * As elsewhere, RTT > 0 is assumed by using dccp_sample_rtt().
195 */ 184 */
196static inline void ccid3_hc_tx_update_win_count(struct ccid3_hc_tx_sock *hctx, 185static inline void ccid3_hc_tx_update_win_count(struct ccid3_hc_tx_sock *hc,
197 ktime_t now) 186 ktime_t now)
198{ 187{
199 u32 delta = ktime_us_delta(now, hctx->ccid3hctx_t_last_win_count), 188 u32 delta = ktime_us_delta(now, hc->tx_t_last_win_count),
200 quarter_rtts = (4 * delta) / hctx->ccid3hctx_rtt; 189 quarter_rtts = (4 * delta) / hc->tx_rtt;
201 190
202 if (quarter_rtts > 0) { 191 if (quarter_rtts > 0) {
203 hctx->ccid3hctx_t_last_win_count = now; 192 hc->tx_t_last_win_count = now;
204 hctx->ccid3hctx_last_win_count += min(quarter_rtts, 5U); 193 hc->tx_last_win_count += min(quarter_rtts, 5U);
205 hctx->ccid3hctx_last_win_count &= 0xF; /* mod 16 */ 194 hc->tx_last_win_count &= 0xF; /* mod 16 */
206 } 195 }
207} 196}
208 197
209static void ccid3_hc_tx_no_feedback_timer(unsigned long data) 198static void ccid3_hc_tx_no_feedback_timer(unsigned long data)
210{ 199{
211 struct sock *sk = (struct sock *)data; 200 struct sock *sk = (struct sock *)data;
212 struct ccid3_hc_tx_sock *hctx = ccid3_hc_tx_sk(sk); 201 struct ccid3_hc_tx_sock *hc = ccid3_hc_tx_sk(sk);
213 unsigned long t_nfb = USEC_PER_SEC / 5; 202 unsigned long t_nfb = USEC_PER_SEC / 5;
214 203
215 bh_lock_sock(sk); 204 bh_lock_sock(sk);
@@ -220,24 +209,23 @@ static void ccid3_hc_tx_no_feedback_timer(unsigned long data)
220 } 209 }
221 210
222 ccid3_pr_debug("%s(%p, state=%s) - entry \n", dccp_role(sk), sk, 211 ccid3_pr_debug("%s(%p, state=%s) - entry \n", dccp_role(sk), sk,
223 ccid3_tx_state_name(hctx->ccid3hctx_state)); 212 ccid3_tx_state_name(hc->tx_state));
224 213
225 if (hctx->ccid3hctx_state == TFRC_SSTATE_FBACK) 214 if (hc->tx_state == TFRC_SSTATE_FBACK)
226 ccid3_hc_tx_set_state(sk, TFRC_SSTATE_NO_FBACK); 215 ccid3_hc_tx_set_state(sk, TFRC_SSTATE_NO_FBACK);
227 else if (hctx->ccid3hctx_state != TFRC_SSTATE_NO_FBACK) 216 else if (hc->tx_state != TFRC_SSTATE_NO_FBACK)
228 goto out; 217 goto out;
229 218
230 /* 219 /*
231 * Determine new allowed sending rate X as per draft rfc3448bis-00, 4.4 220 * Determine new allowed sending rate X as per draft rfc3448bis-00, 4.4
232 */ 221 */
233 if (hctx->ccid3hctx_t_rto == 0 || /* no feedback received yet */ 222 if (hc->tx_t_rto == 0 || /* no feedback received yet */
234 hctx->ccid3hctx_p == 0) { 223 hc->tx_p == 0) {
235 224
236 /* halve send rate directly */ 225 /* halve send rate directly */
237 hctx->ccid3hctx_x = max(hctx->ccid3hctx_x / 2, 226 hc->tx_x = max(hc->tx_x / 2,
238 (((__u64)hctx->ccid3hctx_s) << 6) / 227 (((__u64)hc->tx_s) << 6) / TFRC_T_MBI);
239 TFRC_T_MBI); 228 ccid3_update_send_interval(hc);
240 ccid3_update_send_interval(hctx);
241 } else { 229 } else {
242 /* 230 /*
243 * Modify the cached value of X_recv 231 * Modify the cached value of X_recv
@@ -249,33 +237,32 @@ static void ccid3_hc_tx_no_feedback_timer(unsigned long data)
249 * 237 *
250 * Note that X_recv is scaled by 2^6 while X_calc is not 238 * Note that X_recv is scaled by 2^6 while X_calc is not
251 */ 239 */
252 BUG_ON(hctx->ccid3hctx_p && !hctx->ccid3hctx_x_calc); 240 BUG_ON(hc->tx_p && !hc->tx_x_calc);
253 241
254 if (hctx->ccid3hctx_x_calc > (hctx->ccid3hctx_x_recv >> 5)) 242 if (hc->tx_x_calc > (hc->tx_x_recv >> 5))
255 hctx->ccid3hctx_x_recv = 243 hc->tx_x_recv =
256 max(hctx->ccid3hctx_x_recv / 2, 244 max(hc->tx_x_recv / 2,
257 (((__u64)hctx->ccid3hctx_s) << 6) / 245 (((__u64)hc->tx_s) << 6) / (2*TFRC_T_MBI));
258 (2 * TFRC_T_MBI));
259 else { 246 else {
260 hctx->ccid3hctx_x_recv = hctx->ccid3hctx_x_calc; 247 hc->tx_x_recv = hc->tx_x_calc;
261 hctx->ccid3hctx_x_recv <<= 4; 248 hc->tx_x_recv <<= 4;
262 } 249 }
263 ccid3_hc_tx_update_x(sk, NULL); 250 ccid3_hc_tx_update_x(sk, NULL);
264 } 251 }
265 ccid3_pr_debug("Reduced X to %llu/64 bytes/sec\n", 252 ccid3_pr_debug("Reduced X to %llu/64 bytes/sec\n",
266 (unsigned long long)hctx->ccid3hctx_x); 253 (unsigned long long)hc->tx_x);
267 254
268 /* 255 /*
269 * Set new timeout for the nofeedback timer. 256 * Set new timeout for the nofeedback timer.
270 * See comments in packet_recv() regarding the value of t_RTO. 257 * See comments in packet_recv() regarding the value of t_RTO.
271 */ 258 */
272 if (unlikely(hctx->ccid3hctx_t_rto == 0)) /* no feedback yet */ 259 if (unlikely(hc->tx_t_rto == 0)) /* no feedback yet */
273 t_nfb = TFRC_INITIAL_TIMEOUT; 260 t_nfb = TFRC_INITIAL_TIMEOUT;
274 else 261 else
275 t_nfb = max(hctx->ccid3hctx_t_rto, 2 * hctx->ccid3hctx_t_ipi); 262 t_nfb = max(hc->tx_t_rto, 2 * hc->tx_t_ipi);
276 263
277restart_timer: 264restart_timer:
278 sk_reset_timer(sk, &hctx->ccid3hctx_no_feedback_timer, 265 sk_reset_timer(sk, &hc->tx_no_feedback_timer,
279 jiffies + usecs_to_jiffies(t_nfb)); 266 jiffies + usecs_to_jiffies(t_nfb));
280out: 267out:
281 bh_unlock_sock(sk); 268 bh_unlock_sock(sk);
@@ -291,7 +278,7 @@ out:
291static int ccid3_hc_tx_send_packet(struct sock *sk, struct sk_buff *skb) 278static int ccid3_hc_tx_send_packet(struct sock *sk, struct sk_buff *skb)
292{ 279{
293 struct dccp_sock *dp = dccp_sk(sk); 280 struct dccp_sock *dp = dccp_sk(sk);
294 struct ccid3_hc_tx_sock *hctx = ccid3_hc_tx_sk(sk); 281 struct ccid3_hc_tx_sock *hc = ccid3_hc_tx_sk(sk);
295 ktime_t now = ktime_get_real(); 282 ktime_t now = ktime_get_real();
296 s64 delay; 283 s64 delay;
297 284
@@ -303,18 +290,17 @@ static int ccid3_hc_tx_send_packet(struct sock *sk, struct sk_buff *skb)
303 if (unlikely(skb->len == 0)) 290 if (unlikely(skb->len == 0))
304 return -EBADMSG; 291 return -EBADMSG;
305 292
306 switch (hctx->ccid3hctx_state) { 293 switch (hc->tx_state) {
307 case TFRC_SSTATE_NO_SENT: 294 case TFRC_SSTATE_NO_SENT:
308 sk_reset_timer(sk, &hctx->ccid3hctx_no_feedback_timer, 295 sk_reset_timer(sk, &hc->tx_no_feedback_timer, (jiffies +
309 (jiffies + 296 usecs_to_jiffies(TFRC_INITIAL_TIMEOUT)));
310 usecs_to_jiffies(TFRC_INITIAL_TIMEOUT))); 297 hc->tx_last_win_count = 0;
311 hctx->ccid3hctx_last_win_count = 0; 298 hc->tx_t_last_win_count = now;
312 hctx->ccid3hctx_t_last_win_count = now;
313 299
314 /* Set t_0 for initial packet */ 300 /* Set t_0 for initial packet */
315 hctx->ccid3hctx_t_nom = now; 301 hc->tx_t_nom = now;
316 302
317 hctx->ccid3hctx_s = skb->len; 303 hc->tx_s = skb->len;
318 304
319 /* 305 /*
320 * Use initial RTT sample when available: recommended by erratum 306 * Use initial RTT sample when available: recommended by erratum
@@ -323,9 +309,9 @@ static int ccid3_hc_tx_send_packet(struct sock *sk, struct sk_buff *skb)
323 */ 309 */
324 if (dp->dccps_syn_rtt) { 310 if (dp->dccps_syn_rtt) {
325 ccid3_pr_debug("SYN RTT = %uus\n", dp->dccps_syn_rtt); 311 ccid3_pr_debug("SYN RTT = %uus\n", dp->dccps_syn_rtt);
326 hctx->ccid3hctx_rtt = dp->dccps_syn_rtt; 312 hc->tx_rtt = dp->dccps_syn_rtt;
327 hctx->ccid3hctx_x = rfc3390_initial_rate(sk); 313 hc->tx_x = rfc3390_initial_rate(sk);
328 hctx->ccid3hctx_t_ld = now; 314 hc->tx_t_ld = now;
329 } else { 315 } else {
330 /* 316 /*
331 * Sender does not have RTT sample: 317 * Sender does not have RTT sample:
@@ -333,17 +319,17 @@ static int ccid3_hc_tx_send_packet(struct sock *sk, struct sk_buff *skb)
333 * is needed in several parts (e.g. window counter); 319 * is needed in several parts (e.g. window counter);
334 * - set sending rate X_pps = 1pps as per RFC 3448, 4.2. 320 * - set sending rate X_pps = 1pps as per RFC 3448, 4.2.
335 */ 321 */
336 hctx->ccid3hctx_rtt = DCCP_FALLBACK_RTT; 322 hc->tx_rtt = DCCP_FALLBACK_RTT;
337 hctx->ccid3hctx_x = hctx->ccid3hctx_s; 323 hc->tx_x = hc->tx_s;
338 hctx->ccid3hctx_x <<= 6; 324 hc->tx_x <<= 6;
339 } 325 }
340 ccid3_update_send_interval(hctx); 326 ccid3_update_send_interval(hc);
341 327
342 ccid3_hc_tx_set_state(sk, TFRC_SSTATE_NO_FBACK); 328 ccid3_hc_tx_set_state(sk, TFRC_SSTATE_NO_FBACK);
343 break; 329 break;
344 case TFRC_SSTATE_NO_FBACK: 330 case TFRC_SSTATE_NO_FBACK:
345 case TFRC_SSTATE_FBACK: 331 case TFRC_SSTATE_FBACK:
346 delay = ktime_us_delta(hctx->ccid3hctx_t_nom, now); 332 delay = ktime_us_delta(hc->tx_t_nom, now);
347 ccid3_pr_debug("delay=%ld\n", (long)delay); 333 ccid3_pr_debug("delay=%ld\n", (long)delay);
348 /* 334 /*
349 * Scheduling of packet transmissions [RFC 3448, 4.6] 335 * Scheduling of packet transmissions [RFC 3448, 4.6]
@@ -353,10 +339,10 @@ static int ccid3_hc_tx_send_packet(struct sock *sk, struct sk_buff *skb)
353 * else 339 * else
354 * // send the packet in (t_nom - t_now) milliseconds. 340 * // send the packet in (t_nom - t_now) milliseconds.
355 */ 341 */
356 if (delay - (s64)hctx->ccid3hctx_delta >= 1000) 342 if (delay - (s64)hc->tx_delta >= 1000)
357 return (u32)delay / 1000L; 343 return (u32)delay / 1000L;
358 344
359 ccid3_hc_tx_update_win_count(hctx, now); 345 ccid3_hc_tx_update_win_count(hc, now);
360 break; 346 break;
361 case TFRC_SSTATE_TERM: 347 case TFRC_SSTATE_TERM:
362 DCCP_BUG("%s(%p) - Illegal state TERM", dccp_role(sk), sk); 348 DCCP_BUG("%s(%p) - Illegal state TERM", dccp_role(sk), sk);
@@ -365,28 +351,27 @@ static int ccid3_hc_tx_send_packet(struct sock *sk, struct sk_buff *skb)
365 351
366 /* prepare to send now (add options etc.) */ 352 /* prepare to send now (add options etc.) */
367 dp->dccps_hc_tx_insert_options = 1; 353 dp->dccps_hc_tx_insert_options = 1;
368 DCCP_SKB_CB(skb)->dccpd_ccval = hctx->ccid3hctx_last_win_count; 354 DCCP_SKB_CB(skb)->dccpd_ccval = hc->tx_last_win_count;
369 355
370 /* set the nominal send time for the next following packet */ 356 /* set the nominal send time for the next following packet */
371 hctx->ccid3hctx_t_nom = ktime_add_us(hctx->ccid3hctx_t_nom, 357 hc->tx_t_nom = ktime_add_us(hc->tx_t_nom, hc->tx_t_ipi);
372 hctx->ccid3hctx_t_ipi);
373 return 0; 358 return 0;
374} 359}
375 360
376static void ccid3_hc_tx_packet_sent(struct sock *sk, int more, 361static void ccid3_hc_tx_packet_sent(struct sock *sk, int more,
377 unsigned int len) 362 unsigned int len)
378{ 363{
379 struct ccid3_hc_tx_sock *hctx = ccid3_hc_tx_sk(sk); 364 struct ccid3_hc_tx_sock *hc = ccid3_hc_tx_sk(sk);
380 365
381 ccid3_hc_tx_update_s(hctx, len); 366 ccid3_hc_tx_update_s(hc, len);
382 367
383 if (tfrc_tx_hist_add(&hctx->ccid3hctx_hist, dccp_sk(sk)->dccps_gss)) 368 if (tfrc_tx_hist_add(&hc->tx_hist, dccp_sk(sk)->dccps_gss))
384 DCCP_CRIT("packet history - out of memory!"); 369 DCCP_CRIT("packet history - out of memory!");
385} 370}
386 371
387static void ccid3_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb) 372static void ccid3_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb)
388{ 373{
389 struct ccid3_hc_tx_sock *hctx = ccid3_hc_tx_sk(sk); 374 struct ccid3_hc_tx_sock *hc = ccid3_hc_tx_sk(sk);
390 struct ccid3_options_received *opt_recv; 375 struct ccid3_options_received *opt_recv;
391 ktime_t now; 376 ktime_t now;
392 unsigned long t_nfb; 377 unsigned long t_nfb;
@@ -397,15 +382,15 @@ static void ccid3_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb)
397 DCCP_SKB_CB(skb)->dccpd_type == DCCP_PKT_DATAACK)) 382 DCCP_SKB_CB(skb)->dccpd_type == DCCP_PKT_DATAACK))
398 return; 383 return;
399 /* ... and only in the established state */ 384 /* ... and only in the established state */
400 if (hctx->ccid3hctx_state != TFRC_SSTATE_FBACK && 385 if (hc->tx_state != TFRC_SSTATE_FBACK &&
401 hctx->ccid3hctx_state != TFRC_SSTATE_NO_FBACK) 386 hc->tx_state != TFRC_SSTATE_NO_FBACK)
402 return; 387 return;
403 388
404 opt_recv = &hctx->ccid3hctx_options_received; 389 opt_recv = &hc->tx_options_received;
405 now = ktime_get_real(); 390 now = ktime_get_real();
406 391
407 /* Estimate RTT from history if ACK number is valid */ 392 /* Estimate RTT from history if ACK number is valid */
408 r_sample = tfrc_tx_hist_rtt(hctx->ccid3hctx_hist, 393 r_sample = tfrc_tx_hist_rtt(hc->tx_hist,
409 DCCP_SKB_CB(skb)->dccpd_ack_seq, now); 394 DCCP_SKB_CB(skb)->dccpd_ack_seq, now);
410 if (r_sample == 0) { 395 if (r_sample == 0) {
411 DCCP_WARN("%s(%p): %s with bogus ACK-%llu\n", dccp_role(sk), sk, 396 DCCP_WARN("%s(%p): %s with bogus ACK-%llu\n", dccp_role(sk), sk,
@@ -415,37 +400,37 @@ static void ccid3_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb)
415 } 400 }
416 401
417 /* Update receive rate in units of 64 * bytes/second */ 402 /* Update receive rate in units of 64 * bytes/second */
418 hctx->ccid3hctx_x_recv = opt_recv->ccid3or_receive_rate; 403 hc->tx_x_recv = opt_recv->ccid3or_receive_rate;
419 hctx->ccid3hctx_x_recv <<= 6; 404 hc->tx_x_recv <<= 6;
420 405
421 /* Update loss event rate (which is scaled by 1e6) */ 406 /* Update loss event rate (which is scaled by 1e6) */
422 pinv = opt_recv->ccid3or_loss_event_rate; 407 pinv = opt_recv->ccid3or_loss_event_rate;
423 if (pinv == ~0U || pinv == 0) /* see RFC 4342, 8.5 */ 408 if (pinv == ~0U || pinv == 0) /* see RFC 4342, 8.5 */
424 hctx->ccid3hctx_p = 0; 409 hc->tx_p = 0;
425 else /* can not exceed 100% */ 410 else /* can not exceed 100% */
426 hctx->ccid3hctx_p = scaled_div(1, pinv); 411 hc->tx_p = scaled_div(1, pinv);
427 /* 412 /*
428 * Validate new RTT sample and update moving average 413 * Validate new RTT sample and update moving average
429 */ 414 */
430 r_sample = dccp_sample_rtt(sk, r_sample); 415 r_sample = dccp_sample_rtt(sk, r_sample);
431 hctx->ccid3hctx_rtt = tfrc_ewma(hctx->ccid3hctx_rtt, r_sample, 9); 416 hc->tx_rtt = tfrc_ewma(hc->tx_rtt, r_sample, 9);
432 /* 417 /*
433 * Update allowed sending rate X as per draft rfc3448bis-00, 4.2/3 418 * Update allowed sending rate X as per draft rfc3448bis-00, 4.2/3
434 */ 419 */
435 if (hctx->ccid3hctx_state == TFRC_SSTATE_NO_FBACK) { 420 if (hc->tx_state == TFRC_SSTATE_NO_FBACK) {
436 ccid3_hc_tx_set_state(sk, TFRC_SSTATE_FBACK); 421 ccid3_hc_tx_set_state(sk, TFRC_SSTATE_FBACK);
437 422
438 if (hctx->ccid3hctx_t_rto == 0) { 423 if (hc->tx_t_rto == 0) {
439 /* 424 /*
440 * Initial feedback packet: Larger Initial Windows (4.2) 425 * Initial feedback packet: Larger Initial Windows (4.2)
441 */ 426 */
442 hctx->ccid3hctx_x = rfc3390_initial_rate(sk); 427 hc->tx_x = rfc3390_initial_rate(sk);
443 hctx->ccid3hctx_t_ld = now; 428 hc->tx_t_ld = now;
444 429
445 ccid3_update_send_interval(hctx); 430 ccid3_update_send_interval(hc);
446 431
447 goto done_computing_x; 432 goto done_computing_x;
448 } else if (hctx->ccid3hctx_p == 0) { 433 } else if (hc->tx_p == 0) {
449 /* 434 /*
450 * First feedback after nofeedback timer expiry (4.3) 435 * First feedback after nofeedback timer expiry (4.3)
451 */ 436 */
@@ -454,25 +439,20 @@ static void ccid3_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb)
454 } 439 }
455 440
456 /* Update sending rate (step 4 of [RFC 3448, 4.3]) */ 441 /* Update sending rate (step 4 of [RFC 3448, 4.3]) */
457 if (hctx->ccid3hctx_p > 0) 442 if (hc->tx_p > 0)
458 hctx->ccid3hctx_x_calc = 443 hc->tx_x_calc = tfrc_calc_x(hc->tx_s, hc->tx_rtt, hc->tx_p);
459 tfrc_calc_x(hctx->ccid3hctx_s,
460 hctx->ccid3hctx_rtt,
461 hctx->ccid3hctx_p);
462 ccid3_hc_tx_update_x(sk, &now); 444 ccid3_hc_tx_update_x(sk, &now);
463 445
464done_computing_x: 446done_computing_x:
465 ccid3_pr_debug("%s(%p), RTT=%uus (sample=%uus), s=%u, " 447 ccid3_pr_debug("%s(%p), RTT=%uus (sample=%uus), s=%u, "
466 "p=%u, X_calc=%u, X_recv=%u, X=%u\n", 448 "p=%u, X_calc=%u, X_recv=%u, X=%u\n",
467 dccp_role(sk), 449 dccp_role(sk), sk, hc->tx_rtt, r_sample,
468 sk, hctx->ccid3hctx_rtt, r_sample, 450 hc->tx_s, hc->tx_p, hc->tx_x_calc,
469 hctx->ccid3hctx_s, hctx->ccid3hctx_p, 451 (unsigned)(hc->tx_x_recv >> 6),
470 hctx->ccid3hctx_x_calc, 452 (unsigned)(hc->tx_x >> 6));
471 (unsigned)(hctx->ccid3hctx_x_recv >> 6),
472 (unsigned)(hctx->ccid3hctx_x >> 6));
473 453
474 /* unschedule no feedback timer */ 454 /* unschedule no feedback timer */
475 sk_stop_timer(sk, &hctx->ccid3hctx_no_feedback_timer); 455 sk_stop_timer(sk, &hc->tx_no_feedback_timer);
476 456
477 /* 457 /*
478 * As we have calculated new ipi, delta, t_nom it is possible 458 * As we have calculated new ipi, delta, t_nom it is possible
@@ -486,21 +466,19 @@ done_computing_x:
486 * This can help avoid triggering the nofeedback timer too 466 * This can help avoid triggering the nofeedback timer too
487 * often ('spinning') on LANs with small RTTs. 467 * often ('spinning') on LANs with small RTTs.
488 */ 468 */
489 hctx->ccid3hctx_t_rto = max_t(u32, 4 * hctx->ccid3hctx_rtt, 469 hc->tx_t_rto = max_t(u32, 4 * hc->tx_rtt, (CONFIG_IP_DCCP_CCID3_RTO *
490 (CONFIG_IP_DCCP_CCID3_RTO * 470 (USEC_PER_SEC / 1000)));
491 (USEC_PER_SEC / 1000)));
492 /* 471 /*
493 * Schedule no feedback timer to expire in 472 * Schedule no feedback timer to expire in
494 * max(t_RTO, 2 * s/X) = max(t_RTO, 2 * t_ipi) 473 * max(t_RTO, 2 * s/X) = max(t_RTO, 2 * t_ipi)
495 */ 474 */
496 t_nfb = max(hctx->ccid3hctx_t_rto, 2 * hctx->ccid3hctx_t_ipi); 475 t_nfb = max(hc->tx_t_rto, 2 * hc->tx_t_ipi);
497 476
498 ccid3_pr_debug("%s(%p), Scheduled no feedback timer to " 477 ccid3_pr_debug("%s(%p), Scheduled no feedback timer to "
499 "expire in %lu jiffies (%luus)\n", 478 "expire in %lu jiffies (%luus)\n",
500 dccp_role(sk), 479 dccp_role(sk), sk, usecs_to_jiffies(t_nfb), t_nfb);
501 sk, usecs_to_jiffies(t_nfb), t_nfb);
502 480
503 sk_reset_timer(sk, &hctx->ccid3hctx_no_feedback_timer, 481 sk_reset_timer(sk, &hc->tx_no_feedback_timer,
504 jiffies + usecs_to_jiffies(t_nfb)); 482 jiffies + usecs_to_jiffies(t_nfb));
505} 483}
506 484
@@ -510,11 +488,11 @@ static int ccid3_hc_tx_parse_options(struct sock *sk, unsigned char option,
510{ 488{
511 int rc = 0; 489 int rc = 0;
512 const struct dccp_sock *dp = dccp_sk(sk); 490 const struct dccp_sock *dp = dccp_sk(sk);
513 struct ccid3_hc_tx_sock *hctx = ccid3_hc_tx_sk(sk); 491 struct ccid3_hc_tx_sock *hc = ccid3_hc_tx_sk(sk);
514 struct ccid3_options_received *opt_recv; 492 struct ccid3_options_received *opt_recv;
515 __be32 opt_val; 493 __be32 opt_val;
516 494
517 opt_recv = &hctx->ccid3hctx_options_received; 495 opt_recv = &hc->tx_options_received;
518 496
519 if (opt_recv->ccid3or_seqno != dp->dccps_gsr) { 497 if (opt_recv->ccid3or_seqno != dp->dccps_gsr) {
520 opt_recv->ccid3or_seqno = dp->dccps_gsr; 498 opt_recv->ccid3or_seqno = dp->dccps_gsr;
@@ -568,56 +546,55 @@ static int ccid3_hc_tx_parse_options(struct sock *sk, unsigned char option,
568 546
569static int ccid3_hc_tx_init(struct ccid *ccid, struct sock *sk) 547static int ccid3_hc_tx_init(struct ccid *ccid, struct sock *sk)
570{ 548{
571 struct ccid3_hc_tx_sock *hctx = ccid_priv(ccid); 549 struct ccid3_hc_tx_sock *hc = ccid_priv(ccid);
572 550
573 hctx->ccid3hctx_state = TFRC_SSTATE_NO_SENT; 551 hc->tx_state = TFRC_SSTATE_NO_SENT;
574 hctx->ccid3hctx_hist = NULL; 552 hc->tx_hist = NULL;
575 setup_timer(&hctx->ccid3hctx_no_feedback_timer, 553 setup_timer(&hc->tx_no_feedback_timer,
576 ccid3_hc_tx_no_feedback_timer, (unsigned long)sk); 554 ccid3_hc_tx_no_feedback_timer, (unsigned long)sk);
577
578 return 0; 555 return 0;
579} 556}
580 557
581static void ccid3_hc_tx_exit(struct sock *sk) 558static void ccid3_hc_tx_exit(struct sock *sk)
582{ 559{
583 struct ccid3_hc_tx_sock *hctx = ccid3_hc_tx_sk(sk); 560 struct ccid3_hc_tx_sock *hc = ccid3_hc_tx_sk(sk);
584 561
585 ccid3_hc_tx_set_state(sk, TFRC_SSTATE_TERM); 562 ccid3_hc_tx_set_state(sk, TFRC_SSTATE_TERM);
586 sk_stop_timer(sk, &hctx->ccid3hctx_no_feedback_timer); 563 sk_stop_timer(sk, &hc->tx_no_feedback_timer);
587 564
588 tfrc_tx_hist_purge(&hctx->ccid3hctx_hist); 565 tfrc_tx_hist_purge(&hc->tx_hist);
589} 566}
590 567
591static void ccid3_hc_tx_get_info(struct sock *sk, struct tcp_info *info) 568static void ccid3_hc_tx_get_info(struct sock *sk, struct tcp_info *info)
592{ 569{
593 struct ccid3_hc_tx_sock *hctx; 570 struct ccid3_hc_tx_sock *hc;
594 571
595 /* Listen socks doesn't have a private CCID block */ 572 /* Listen socks doesn't have a private CCID block */
596 if (sk->sk_state == DCCP_LISTEN) 573 if (sk->sk_state == DCCP_LISTEN)
597 return; 574 return;
598 575
599 hctx = ccid3_hc_tx_sk(sk); 576 hc = ccid3_hc_tx_sk(sk);
600 info->tcpi_rto = hctx->ccid3hctx_t_rto; 577 info->tcpi_rto = hc->tx_t_rto;
601 info->tcpi_rtt = hctx->ccid3hctx_rtt; 578 info->tcpi_rtt = hc->tx_rtt;
602} 579}
603 580
604static int ccid3_hc_tx_getsockopt(struct sock *sk, const int optname, int len, 581static int ccid3_hc_tx_getsockopt(struct sock *sk, const int optname, int len,
605 u32 __user *optval, int __user *optlen) 582 u32 __user *optval, int __user *optlen)
606{ 583{
607 const struct ccid3_hc_tx_sock *hctx; 584 const struct ccid3_hc_tx_sock *hc;
608 const void *val; 585 const void *val;
609 586
610 /* Listen socks doesn't have a private CCID block */ 587 /* Listen socks doesn't have a private CCID block */
611 if (sk->sk_state == DCCP_LISTEN) 588 if (sk->sk_state == DCCP_LISTEN)
612 return -EINVAL; 589 return -EINVAL;
613 590
614 hctx = ccid3_hc_tx_sk(sk); 591 hc = ccid3_hc_tx_sk(sk);
615 switch (optname) { 592 switch (optname) {
616 case DCCP_SOCKOPT_CCID_TX_INFO: 593 case DCCP_SOCKOPT_CCID_TX_INFO:
617 if (len < sizeof(hctx->ccid3hctx_tfrc)) 594 if (len < sizeof(hc->tx_tfrc))
618 return -EINVAL; 595 return -EINVAL;
619 len = sizeof(hctx->ccid3hctx_tfrc); 596 len = sizeof(hc->tx_tfrc);
620 val = &hctx->ccid3hctx_tfrc; 597 val = &hc->tx_tfrc;
621 break; 598 break;
622 default: 599 default:
623 return -ENOPROTOOPT; 600 return -ENOPROTOOPT;
@@ -657,34 +634,34 @@ static const char *ccid3_rx_state_name(enum ccid3_hc_rx_states state)
657static void ccid3_hc_rx_set_state(struct sock *sk, 634static void ccid3_hc_rx_set_state(struct sock *sk,
658 enum ccid3_hc_rx_states state) 635 enum ccid3_hc_rx_states state)
659{ 636{
660 struct ccid3_hc_rx_sock *hcrx = ccid3_hc_rx_sk(sk); 637 struct ccid3_hc_rx_sock *hc = ccid3_hc_rx_sk(sk);
661 enum ccid3_hc_rx_states oldstate = hcrx->ccid3hcrx_state; 638 enum ccid3_hc_rx_states oldstate = hc->rx_state;
662 639
663 ccid3_pr_debug("%s(%p) %-8.8s -> %s\n", 640 ccid3_pr_debug("%s(%p) %-8.8s -> %s\n",
664 dccp_role(sk), sk, ccid3_rx_state_name(oldstate), 641 dccp_role(sk), sk, ccid3_rx_state_name(oldstate),
665 ccid3_rx_state_name(state)); 642 ccid3_rx_state_name(state));
666 WARN_ON(state == oldstate); 643 WARN_ON(state == oldstate);
667 hcrx->ccid3hcrx_state = state; 644 hc->rx_state = state;
668} 645}
669 646
670static void ccid3_hc_rx_send_feedback(struct sock *sk, 647static void ccid3_hc_rx_send_feedback(struct sock *sk,
671 const struct sk_buff *skb, 648 const struct sk_buff *skb,
672 enum ccid3_fback_type fbtype) 649 enum ccid3_fback_type fbtype)
673{ 650{
674 struct ccid3_hc_rx_sock *hcrx = ccid3_hc_rx_sk(sk); 651 struct ccid3_hc_rx_sock *hc = ccid3_hc_rx_sk(sk);
675 struct dccp_sock *dp = dccp_sk(sk); 652 struct dccp_sock *dp = dccp_sk(sk);
676 ktime_t now; 653 ktime_t now;
677 s64 delta = 0; 654 s64 delta = 0;
678 655
679 if (unlikely(hcrx->ccid3hcrx_state == TFRC_RSTATE_TERM)) 656 if (unlikely(hc->rx_state == TFRC_RSTATE_TERM))
680 return; 657 return;
681 658
682 now = ktime_get_real(); 659 now = ktime_get_real();
683 660
684 switch (fbtype) { 661 switch (fbtype) {
685 case CCID3_FBACK_INITIAL: 662 case CCID3_FBACK_INITIAL:
686 hcrx->ccid3hcrx_x_recv = 0; 663 hc->rx_x_recv = 0;
687 hcrx->ccid3hcrx_pinv = ~0U; /* see RFC 4342, 8.5 */ 664 hc->rx_pinv = ~0U; /* see RFC 4342, 8.5 */
688 break; 665 break;
689 case CCID3_FBACK_PARAM_CHANGE: 666 case CCID3_FBACK_PARAM_CHANGE:
690 /* 667 /*
@@ -697,27 +674,26 @@ static void ccid3_hc_rx_send_feedback(struct sock *sk,
697 * the number of bytes since last feedback. 674 * the number of bytes since last feedback.
698 * This is a safe fallback, since X is bounded above by X_calc. 675 * This is a safe fallback, since X is bounded above by X_calc.
699 */ 676 */
700 if (hcrx->ccid3hcrx_x_recv > 0) 677 if (hc->rx_x_recv > 0)
701 break; 678 break;
702 /* fall through */ 679 /* fall through */
703 case CCID3_FBACK_PERIODIC: 680 case CCID3_FBACK_PERIODIC:
704 delta = ktime_us_delta(now, hcrx->ccid3hcrx_tstamp_last_feedback); 681 delta = ktime_us_delta(now, hc->rx_tstamp_last_feedback);
705 if (delta <= 0) 682 if (delta <= 0)
706 DCCP_BUG("delta (%ld) <= 0", (long)delta); 683 DCCP_BUG("delta (%ld) <= 0", (long)delta);
707 else 684 else
708 hcrx->ccid3hcrx_x_recv = 685 hc->rx_x_recv = scaled_div32(hc->rx_bytes_recv, delta);
709 scaled_div32(hcrx->ccid3hcrx_bytes_recv, delta);
710 break; 686 break;
711 default: 687 default:
712 return; 688 return;
713 } 689 }
714 690
715 ccid3_pr_debug("Interval %ldusec, X_recv=%u, 1/p=%u\n", (long)delta, 691 ccid3_pr_debug("Interval %ldusec, X_recv=%u, 1/p=%u\n", (long)delta,
716 hcrx->ccid3hcrx_x_recv, hcrx->ccid3hcrx_pinv); 692 hc->rx_x_recv, hc->rx_pinv);
717 693
718 hcrx->ccid3hcrx_tstamp_last_feedback = now; 694 hc->rx_tstamp_last_feedback = now;
719 hcrx->ccid3hcrx_last_counter = dccp_hdr(skb)->dccph_ccval; 695 hc->rx_last_counter = dccp_hdr(skb)->dccph_ccval;
720 hcrx->ccid3hcrx_bytes_recv = 0; 696 hc->rx_bytes_recv = 0;
721 697
722 dp->dccps_hc_rx_insert_options = 1; 698 dp->dccps_hc_rx_insert_options = 1;
723 dccp_send_ack(sk); 699 dccp_send_ack(sk);
@@ -725,19 +701,19 @@ static void ccid3_hc_rx_send_feedback(struct sock *sk,
725 701
726static int ccid3_hc_rx_insert_options(struct sock *sk, struct sk_buff *skb) 702static int ccid3_hc_rx_insert_options(struct sock *sk, struct sk_buff *skb)
727{ 703{
728 const struct ccid3_hc_rx_sock *hcrx; 704 const struct ccid3_hc_rx_sock *hc;
729 __be32 x_recv, pinv; 705 __be32 x_recv, pinv;
730 706
731 if (!(sk->sk_state == DCCP_OPEN || sk->sk_state == DCCP_PARTOPEN)) 707 if (!(sk->sk_state == DCCP_OPEN || sk->sk_state == DCCP_PARTOPEN))
732 return 0; 708 return 0;
733 709
734 hcrx = ccid3_hc_rx_sk(sk); 710 hc = ccid3_hc_rx_sk(sk);
735 711
736 if (dccp_packet_without_ack(skb)) 712 if (dccp_packet_without_ack(skb))
737 return 0; 713 return 0;
738 714
739 x_recv = htonl(hcrx->ccid3hcrx_x_recv); 715 x_recv = htonl(hc->rx_x_recv);
740 pinv = htonl(hcrx->ccid3hcrx_pinv); 716 pinv = htonl(hc->rx_pinv);
741 717
742 if (dccp_insert_option(sk, skb, TFRC_OPT_LOSS_EVENT_RATE, 718 if (dccp_insert_option(sk, skb, TFRC_OPT_LOSS_EVENT_RATE,
743 &pinv, sizeof(pinv)) || 719 &pinv, sizeof(pinv)) ||
@@ -760,26 +736,26 @@ static int ccid3_hc_rx_insert_options(struct sock *sk, struct sk_buff *skb)
760 */ 736 */
761static u32 ccid3_first_li(struct sock *sk) 737static u32 ccid3_first_li(struct sock *sk)
762{ 738{
763 struct ccid3_hc_rx_sock *hcrx = ccid3_hc_rx_sk(sk); 739 struct ccid3_hc_rx_sock *hc = ccid3_hc_rx_sk(sk);
764 u32 x_recv, p, delta; 740 u32 x_recv, p, delta;
765 u64 fval; 741 u64 fval;
766 742
767 if (hcrx->ccid3hcrx_rtt == 0) { 743 if (hc->rx_rtt == 0) {
768 DCCP_WARN("No RTT estimate available, using fallback RTT\n"); 744 DCCP_WARN("No RTT estimate available, using fallback RTT\n");
769 hcrx->ccid3hcrx_rtt = DCCP_FALLBACK_RTT; 745 hc->rx_rtt = DCCP_FALLBACK_RTT;
770 } 746 }
771 747
772 delta = ktime_to_us(net_timedelta(hcrx->ccid3hcrx_tstamp_last_feedback)); 748 delta = ktime_to_us(net_timedelta(hc->rx_tstamp_last_feedback));
773 x_recv = scaled_div32(hcrx->ccid3hcrx_bytes_recv, delta); 749 x_recv = scaled_div32(hc->rx_bytes_recv, delta);
774 if (x_recv == 0) { /* would also trigger divide-by-zero */ 750 if (x_recv == 0) { /* would also trigger divide-by-zero */
775 DCCP_WARN("X_recv==0\n"); 751 DCCP_WARN("X_recv==0\n");
776 if ((x_recv = hcrx->ccid3hcrx_x_recv) == 0) { 752 if ((x_recv = hc->rx_x_recv) == 0) {
777 DCCP_BUG("stored value of X_recv is zero"); 753 DCCP_BUG("stored value of X_recv is zero");
778 return ~0U; 754 return ~0U;
779 } 755 }
780 } 756 }
781 757
782 fval = scaled_div(hcrx->ccid3hcrx_s, hcrx->ccid3hcrx_rtt); 758 fval = scaled_div(hc->rx_s, hc->rx_rtt);
783 fval = scaled_div32(fval, x_recv); 759 fval = scaled_div32(fval, x_recv);
784 p = tfrc_calc_x_reverse_lookup(fval); 760 p = tfrc_calc_x_reverse_lookup(fval);
785 761
@@ -791,19 +767,19 @@ static u32 ccid3_first_li(struct sock *sk)
791 767
792static void ccid3_hc_rx_packet_recv(struct sock *sk, struct sk_buff *skb) 768static void ccid3_hc_rx_packet_recv(struct sock *sk, struct sk_buff *skb)
793{ 769{
794 struct ccid3_hc_rx_sock *hcrx = ccid3_hc_rx_sk(sk); 770 struct ccid3_hc_rx_sock *hc = ccid3_hc_rx_sk(sk);
795 enum ccid3_fback_type do_feedback = CCID3_FBACK_NONE; 771 enum ccid3_fback_type do_feedback = CCID3_FBACK_NONE;
796 const u64 ndp = dccp_sk(sk)->dccps_options_received.dccpor_ndp; 772 const u64 ndp = dccp_sk(sk)->dccps_options_received.dccpor_ndp;
797 const bool is_data_packet = dccp_data_packet(skb); 773 const bool is_data_packet = dccp_data_packet(skb);
798 774
799 if (unlikely(hcrx->ccid3hcrx_state == TFRC_RSTATE_NO_DATA)) { 775 if (unlikely(hc->rx_state == TFRC_RSTATE_NO_DATA)) {
800 if (is_data_packet) { 776 if (is_data_packet) {
801 const u32 payload = skb->len - dccp_hdr(skb)->dccph_doff * 4; 777 const u32 payload = skb->len - dccp_hdr(skb)->dccph_doff * 4;
802 do_feedback = CCID3_FBACK_INITIAL; 778 do_feedback = CCID3_FBACK_INITIAL;
803 ccid3_hc_rx_set_state(sk, TFRC_RSTATE_DATA); 779 ccid3_hc_rx_set_state(sk, TFRC_RSTATE_DATA);
804 hcrx->ccid3hcrx_s = payload; 780 hc->rx_s = payload;
805 /* 781 /*
806 * Not necessary to update ccid3hcrx_bytes_recv here, 782 * Not necessary to update rx_bytes_recv here,
807 * since X_recv = 0 for the first feedback packet (cf. 783 * since X_recv = 0 for the first feedback packet (cf.
808 * RFC 3448, 6.3) -- gerrit 784 * RFC 3448, 6.3) -- gerrit
809 */ 785 */
@@ -811,7 +787,7 @@ static void ccid3_hc_rx_packet_recv(struct sock *sk, struct sk_buff *skb)
811 goto update_records; 787 goto update_records;
812 } 788 }
813 789
814 if (tfrc_rx_hist_duplicate(&hcrx->ccid3hcrx_hist, skb)) 790 if (tfrc_rx_hist_duplicate(&hc->rx_hist, skb))
815 return; /* done receiving */ 791 return; /* done receiving */
816 792
817 if (is_data_packet) { 793 if (is_data_packet) {
@@ -819,20 +795,20 @@ static void ccid3_hc_rx_packet_recv(struct sock *sk, struct sk_buff *skb)
819 /* 795 /*
820 * Update moving-average of s and the sum of received payload bytes 796 * Update moving-average of s and the sum of received payload bytes
821 */ 797 */
822 hcrx->ccid3hcrx_s = tfrc_ewma(hcrx->ccid3hcrx_s, payload, 9); 798 hc->rx_s = tfrc_ewma(hc->rx_s, payload, 9);
823 hcrx->ccid3hcrx_bytes_recv += payload; 799 hc->rx_bytes_recv += payload;
824 } 800 }
825 801
826 /* 802 /*
827 * Perform loss detection and handle pending losses 803 * Perform loss detection and handle pending losses
828 */ 804 */
829 if (tfrc_rx_handle_loss(&hcrx->ccid3hcrx_hist, &hcrx->ccid3hcrx_li_hist, 805 if (tfrc_rx_handle_loss(&hc->rx_hist, &hc->rx_li_hist,
830 skb, ndp, ccid3_first_li, sk)) { 806 skb, ndp, ccid3_first_li, sk)) {
831 do_feedback = CCID3_FBACK_PARAM_CHANGE; 807 do_feedback = CCID3_FBACK_PARAM_CHANGE;
832 goto done_receiving; 808 goto done_receiving;
833 } 809 }
834 810
835 if (tfrc_rx_hist_loss_pending(&hcrx->ccid3hcrx_hist)) 811 if (tfrc_rx_hist_loss_pending(&hc->rx_hist))
836 return; /* done receiving */ 812 return; /* done receiving */
837 813
838 /* 814 /*
@@ -841,17 +817,17 @@ static void ccid3_hc_rx_packet_recv(struct sock *sk, struct sk_buff *skb)
841 if (unlikely(!is_data_packet)) 817 if (unlikely(!is_data_packet))
842 goto update_records; 818 goto update_records;
843 819
844 if (!tfrc_lh_is_initialised(&hcrx->ccid3hcrx_li_hist)) { 820 if (!tfrc_lh_is_initialised(&hc->rx_li_hist)) {
845 const u32 sample = tfrc_rx_hist_sample_rtt(&hcrx->ccid3hcrx_hist, skb); 821 const u32 sample = tfrc_rx_hist_sample_rtt(&hc->rx_hist, skb);
846 /* 822 /*
847 * Empty loss history: no loss so far, hence p stays 0. 823 * Empty loss history: no loss so far, hence p stays 0.
848 * Sample RTT values, since an RTT estimate is required for the 824 * Sample RTT values, since an RTT estimate is required for the
849 * computation of p when the first loss occurs; RFC 3448, 6.3.1. 825 * computation of p when the first loss occurs; RFC 3448, 6.3.1.
850 */ 826 */
851 if (sample != 0) 827 if (sample != 0)
852 hcrx->ccid3hcrx_rtt = tfrc_ewma(hcrx->ccid3hcrx_rtt, sample, 9); 828 hc->rx_rtt = tfrc_ewma(hc->rx_rtt, sample, 9);
853 829
854 } else if (tfrc_lh_update_i_mean(&hcrx->ccid3hcrx_li_hist, skb)) { 830 } else if (tfrc_lh_update_i_mean(&hc->rx_li_hist, skb)) {
855 /* 831 /*
856 * Step (3) of [RFC 3448, 6.1]: Recompute I_mean and, if I_mean 832 * Step (3) of [RFC 3448, 6.1]: Recompute I_mean and, if I_mean
857 * has decreased (resp. p has increased), send feedback now. 833 * has decreased (resp. p has increased), send feedback now.
@@ -862,11 +838,11 @@ static void ccid3_hc_rx_packet_recv(struct sock *sk, struct sk_buff *skb)
862 /* 838 /*
863 * Check if the periodic once-per-RTT feedback is due; RFC 4342, 10.3 839 * Check if the periodic once-per-RTT feedback is due; RFC 4342, 10.3
864 */ 840 */
865 if (SUB16(dccp_hdr(skb)->dccph_ccval, hcrx->ccid3hcrx_last_counter) > 3) 841 if (SUB16(dccp_hdr(skb)->dccph_ccval, hc->rx_last_counter) > 3)
866 do_feedback = CCID3_FBACK_PERIODIC; 842 do_feedback = CCID3_FBACK_PERIODIC;
867 843
868update_records: 844update_records:
869 tfrc_rx_hist_add_packet(&hcrx->ccid3hcrx_hist, skb, ndp); 845 tfrc_rx_hist_add_packet(&hc->rx_hist, skb, ndp);
870 846
871done_receiving: 847done_receiving:
872 if (do_feedback) 848 if (do_feedback)
@@ -875,41 +851,41 @@ done_receiving:
875 851
876static int ccid3_hc_rx_init(struct ccid *ccid, struct sock *sk) 852static int ccid3_hc_rx_init(struct ccid *ccid, struct sock *sk)
877{ 853{
878 struct ccid3_hc_rx_sock *hcrx = ccid_priv(ccid); 854 struct ccid3_hc_rx_sock *hc = ccid_priv(ccid);
879 855
880 hcrx->ccid3hcrx_state = TFRC_RSTATE_NO_DATA; 856 hc->rx_state = TFRC_RSTATE_NO_DATA;
881 tfrc_lh_init(&hcrx->ccid3hcrx_li_hist); 857 tfrc_lh_init(&hc->rx_li_hist);
882 return tfrc_rx_hist_alloc(&hcrx->ccid3hcrx_hist); 858 return tfrc_rx_hist_alloc(&hc->rx_hist);
883} 859}
884 860
885static void ccid3_hc_rx_exit(struct sock *sk) 861static void ccid3_hc_rx_exit(struct sock *sk)
886{ 862{
887 struct ccid3_hc_rx_sock *hcrx = ccid3_hc_rx_sk(sk); 863 struct ccid3_hc_rx_sock *hc = ccid3_hc_rx_sk(sk);
888 864
889 ccid3_hc_rx_set_state(sk, TFRC_RSTATE_TERM); 865 ccid3_hc_rx_set_state(sk, TFRC_RSTATE_TERM);
890 866
891 tfrc_rx_hist_purge(&hcrx->ccid3hcrx_hist); 867 tfrc_rx_hist_purge(&hc->rx_hist);
892 tfrc_lh_cleanup(&hcrx->ccid3hcrx_li_hist); 868 tfrc_lh_cleanup(&hc->rx_li_hist);
893} 869}
894 870
895static void ccid3_hc_rx_get_info(struct sock *sk, struct tcp_info *info) 871static void ccid3_hc_rx_get_info(struct sock *sk, struct tcp_info *info)
896{ 872{
897 const struct ccid3_hc_rx_sock *hcrx; 873 const struct ccid3_hc_rx_sock *hc;
898 874
899 /* Listen socks doesn't have a private CCID block */ 875 /* Listen socks doesn't have a private CCID block */
900 if (sk->sk_state == DCCP_LISTEN) 876 if (sk->sk_state == DCCP_LISTEN)
901 return; 877 return;
902 878
903 hcrx = ccid3_hc_rx_sk(sk); 879 hc = ccid3_hc_rx_sk(sk);
904 info->tcpi_ca_state = hcrx->ccid3hcrx_state; 880 info->tcpi_ca_state = hc->rx_state;
905 info->tcpi_options |= TCPI_OPT_TIMESTAMPS; 881 info->tcpi_options |= TCPI_OPT_TIMESTAMPS;
906 info->tcpi_rcv_rtt = hcrx->ccid3hcrx_rtt; 882 info->tcpi_rcv_rtt = hc->rx_rtt;
907} 883}
908 884
909static int ccid3_hc_rx_getsockopt(struct sock *sk, const int optname, int len, 885static int ccid3_hc_rx_getsockopt(struct sock *sk, const int optname, int len,
910 u32 __user *optval, int __user *optlen) 886 u32 __user *optval, int __user *optlen)
911{ 887{
912 const struct ccid3_hc_rx_sock *hcrx; 888 const struct ccid3_hc_rx_sock *hc;
913 struct tfrc_rx_info rx_info; 889 struct tfrc_rx_info rx_info;
914 const void *val; 890 const void *val;
915 891
@@ -917,15 +893,15 @@ static int ccid3_hc_rx_getsockopt(struct sock *sk, const int optname, int len,
917 if (sk->sk_state == DCCP_LISTEN) 893 if (sk->sk_state == DCCP_LISTEN)
918 return -EINVAL; 894 return -EINVAL;
919 895
920 hcrx = ccid3_hc_rx_sk(sk); 896 hc = ccid3_hc_rx_sk(sk);
921 switch (optname) { 897 switch (optname) {
922 case DCCP_SOCKOPT_CCID_RX_INFO: 898 case DCCP_SOCKOPT_CCID_RX_INFO:
923 if (len < sizeof(rx_info)) 899 if (len < sizeof(rx_info))
924 return -EINVAL; 900 return -EINVAL;
925 rx_info.tfrcrx_x_recv = hcrx->ccid3hcrx_x_recv; 901 rx_info.tfrcrx_x_recv = hc->rx_x_recv;
926 rx_info.tfrcrx_rtt = hcrx->ccid3hcrx_rtt; 902 rx_info.tfrcrx_rtt = hc->rx_rtt;
927 rx_info.tfrcrx_p = hcrx->ccid3hcrx_pinv == 0 ? ~0U : 903 rx_info.tfrcrx_p = hc->rx_pinv == 0 ? ~0U :
928 scaled_div(1, hcrx->ccid3hcrx_pinv); 904 scaled_div(1, hc->rx_pinv);
929 len = sizeof(rx_info); 905 len = sizeof(rx_info);
930 val = &rx_info; 906 val = &rx_info;
931 break; 907 break;
diff --git a/net/dccp/ccids/ccid3.h b/net/dccp/ccids/ccid3.h
index e5a244143846..032635776653 100644
--- a/net/dccp/ccids/ccid3.h
+++ b/net/dccp/ccids/ccid3.h
@@ -75,44 +75,44 @@ enum ccid3_hc_tx_states {
75 75
76/** 76/**
77 * struct ccid3_hc_tx_sock - CCID3 sender half-connection socket 77 * struct ccid3_hc_tx_sock - CCID3 sender half-connection socket
78 * @ccid3hctx_x - Current sending rate in 64 * bytes per second 78 * @tx_x: Current sending rate in 64 * bytes per second
79 * @ccid3hctx_x_recv - Receive rate in 64 * bytes per second 79 * @tx_x_recv: Receive rate in 64 * bytes per second
80 * @ccid3hctx_x_calc - Calculated rate in bytes per second 80 * @tx_x_calc: Calculated rate in bytes per second
81 * @ccid3hctx_rtt - Estimate of current round trip time in usecs 81 * @tx_rtt: Estimate of current round trip time in usecs
82 * @ccid3hctx_p - Current loss event rate (0-1) scaled by 1000000 82 * @tx_p: Current loss event rate (0-1) scaled by 1000000
83 * @ccid3hctx_s - Packet size in bytes 83 * @tx_s: Packet size in bytes
84 * @ccid3hctx_t_rto - Nofeedback Timer setting in usecs 84 * @tx_t_rto: Nofeedback Timer setting in usecs
85 * @ccid3hctx_t_ipi - Interpacket (send) interval (RFC 3448, 4.6) in usecs 85 * @tx_t_ipi: Interpacket (send) interval (RFC 3448, 4.6) in usecs
86 * @ccid3hctx_state - Sender state, one of %ccid3_hc_tx_states 86 * @tx_state: Sender state, one of %ccid3_hc_tx_states
87 * @ccid3hctx_last_win_count - Last window counter sent 87 * @tx_last_win_count: Last window counter sent
88 * @ccid3hctx_t_last_win_count - Timestamp of earliest packet 88 * @tx_t_last_win_count: Timestamp of earliest packet
89 * with last_win_count value sent 89 * with last_win_count value sent
90 * @ccid3hctx_no_feedback_timer - Handle to no feedback timer 90 * @tx_no_feedback_timer: Handle to no feedback timer
91 * @ccid3hctx_t_ld - Time last doubled during slow start 91 * @tx_t_ld: Time last doubled during slow start
92 * @ccid3hctx_t_nom - Nominal send time of next packet 92 * @tx_t_nom: Nominal send time of next packet
93 * @ccid3hctx_delta - Send timer delta (RFC 3448, 4.6) in usecs 93 * @tx_delta: Send timer delta (RFC 3448, 4.6) in usecs
94 * @ccid3hctx_hist - Packet history 94 * @tx_hist: Packet history
95 * @ccid3hctx_options_received - Parsed set of retrieved options 95 * @tx_options_received: Parsed set of retrieved options
96 */ 96 */
97struct ccid3_hc_tx_sock { 97struct ccid3_hc_tx_sock {
98 struct tfrc_tx_info ccid3hctx_tfrc; 98 struct tfrc_tx_info tx_tfrc;
99#define ccid3hctx_x ccid3hctx_tfrc.tfrctx_x 99#define tx_x tx_tfrc.tfrctx_x
100#define ccid3hctx_x_recv ccid3hctx_tfrc.tfrctx_x_recv 100#define tx_x_recv tx_tfrc.tfrctx_x_recv
101#define ccid3hctx_x_calc ccid3hctx_tfrc.tfrctx_x_calc 101#define tx_x_calc tx_tfrc.tfrctx_x_calc
102#define ccid3hctx_rtt ccid3hctx_tfrc.tfrctx_rtt 102#define tx_rtt tx_tfrc.tfrctx_rtt
103#define ccid3hctx_p ccid3hctx_tfrc.tfrctx_p 103#define tx_p tx_tfrc.tfrctx_p
104#define ccid3hctx_t_rto ccid3hctx_tfrc.tfrctx_rto 104#define tx_t_rto tx_tfrc.tfrctx_rto
105#define ccid3hctx_t_ipi ccid3hctx_tfrc.tfrctx_ipi 105#define tx_t_ipi tx_tfrc.tfrctx_ipi
106 u16 ccid3hctx_s; 106 u16 tx_s;
107 enum ccid3_hc_tx_states ccid3hctx_state:8; 107 enum ccid3_hc_tx_states tx_state:8;
108 u8 ccid3hctx_last_win_count; 108 u8 tx_last_win_count;
109 ktime_t ccid3hctx_t_last_win_count; 109 ktime_t tx_t_last_win_count;
110 struct timer_list ccid3hctx_no_feedback_timer; 110 struct timer_list tx_no_feedback_timer;
111 ktime_t ccid3hctx_t_ld; 111 ktime_t tx_t_ld;
112 ktime_t ccid3hctx_t_nom; 112 ktime_t tx_t_nom;
113 u32 ccid3hctx_delta; 113 u32 tx_delta;
114 struct tfrc_tx_hist_entry *ccid3hctx_hist; 114 struct tfrc_tx_hist_entry *tx_hist;
115 struct ccid3_options_received ccid3hctx_options_received; 115 struct ccid3_options_received tx_options_received;
116}; 116};
117 117
118static inline struct ccid3_hc_tx_sock *ccid3_hc_tx_sk(const struct sock *sk) 118static inline struct ccid3_hc_tx_sock *ccid3_hc_tx_sk(const struct sock *sk)
@@ -131,32 +131,32 @@ enum ccid3_hc_rx_states {
131 131
132/** 132/**
133 * struct ccid3_hc_rx_sock - CCID3 receiver half-connection socket 133 * struct ccid3_hc_rx_sock - CCID3 receiver half-connection socket
134 * @ccid3hcrx_x_recv - Receiver estimate of send rate (RFC 3448 4.3) 134 * @rx_x_recv: Receiver estimate of send rate (RFC 3448 4.3)
135 * @ccid3hcrx_rtt - Receiver estimate of rtt (non-standard) 135 * @rx_rtt: Receiver estimate of rtt (non-standard)
136 * @ccid3hcrx_p - Current loss event rate (RFC 3448 5.4) 136 * @rx_p: Current loss event rate (RFC 3448 5.4)
137 * @ccid3hcrx_last_counter - Tracks window counter (RFC 4342, 8.1) 137 * @rx_last_counter: Tracks window counter (RFC 4342, 8.1)
138 * @ccid3hcrx_state - Receiver state, one of %ccid3_hc_rx_states 138 * @rx_state: Receiver state, one of %ccid3_hc_rx_states
139 * @ccid3hcrx_bytes_recv - Total sum of DCCP payload bytes 139 * @rx_bytes_recv: Total sum of DCCP payload bytes
140 * @ccid3hcrx_x_recv - Receiver estimate of send rate (RFC 3448, sec. 4.3) 140 * @rx_x_recv: Receiver estimate of send rate (RFC 3448, sec. 4.3)
141 * @ccid3hcrx_rtt - Receiver estimate of RTT 141 * @rx_rtt: Receiver estimate of RTT
142 * @ccid3hcrx_tstamp_last_feedback - Time at which last feedback was sent 142 * @rx_tstamp_last_feedback: Time at which last feedback was sent
143 * @ccid3hcrx_tstamp_last_ack - Time at which last feedback was sent 143 * @rx_tstamp_last_ack: Time at which last feedback was sent
144 * @ccid3hcrx_hist - Packet history (loss detection + RTT sampling) 144 * @rx_hist: Packet history (loss detection + RTT sampling)
145 * @ccid3hcrx_li_hist - Loss Interval database 145 * @rx_li_hist: Loss Interval database
146 * @ccid3hcrx_s - Received packet size in bytes 146 * @rx_s: Received packet size in bytes
147 * @ccid3hcrx_pinv - Inverse of Loss Event Rate (RFC 4342, sec. 8.5) 147 * @rx_pinv: Inverse of Loss Event Rate (RFC 4342, sec. 8.5)
148 */ 148 */
149struct ccid3_hc_rx_sock { 149struct ccid3_hc_rx_sock {
150 u8 ccid3hcrx_last_counter:4; 150 u8 rx_last_counter:4;
151 enum ccid3_hc_rx_states ccid3hcrx_state:8; 151 enum ccid3_hc_rx_states rx_state:8;
152 u32 ccid3hcrx_bytes_recv; 152 u32 rx_bytes_recv;
153 u32 ccid3hcrx_x_recv; 153 u32 rx_x_recv;
154 u32 ccid3hcrx_rtt; 154 u32 rx_rtt;
155 ktime_t ccid3hcrx_tstamp_last_feedback; 155 ktime_t rx_tstamp_last_feedback;
156 struct tfrc_rx_hist ccid3hcrx_hist; 156 struct tfrc_rx_hist rx_hist;
157 struct tfrc_loss_hist ccid3hcrx_li_hist; 157 struct tfrc_loss_hist rx_li_hist;
158 u16 ccid3hcrx_s; 158 u16 rx_s;
159#define ccid3hcrx_pinv ccid3hcrx_li_hist.i_mean 159#define rx_pinv rx_li_hist.i_mean
160}; 160};
161 161
162static inline struct ccid3_hc_rx_sock *ccid3_hc_rx_sk(const struct sock *sk) 162static inline struct ccid3_hc_rx_sock *ccid3_hc_rx_sk(const struct sock *sk)
generated by cgit v1.2.2 (git 2.25.0) at 2026-01-07 04:36:12 -0500