Blame view
net/sctp/ulpqueue.c
29.2 KB
60c778b25 [SCTP]: Stop clai... |
1 |
/* SCTP kernel implementation |
1da177e4c Linux-2.6.12-rc2 |
2 3 4 5 6 7 8 9 10 |
* (C) Copyright IBM Corp. 2001, 2004 * Copyright (c) 1999-2000 Cisco, Inc. * Copyright (c) 1999-2001 Motorola, Inc. * Copyright (c) 2001 Intel Corp. * Copyright (c) 2001 Nokia, Inc. * Copyright (c) 2001 La Monte H.P. Yarroll * * This abstraction carries sctp events to the ULP (sockets). * |
60c778b25 [SCTP]: Stop clai... |
11 |
* This SCTP implementation is free software; |
1da177e4c Linux-2.6.12-rc2 |
12 13 14 15 16 |
* you can redistribute it and/or modify it under the terms of * the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * |
60c778b25 [SCTP]: Stop clai... |
17 |
* This SCTP implementation is distributed in the hope that it |
1da177e4c Linux-2.6.12-rc2 |
18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 |
* will be useful, but WITHOUT ANY WARRANTY; without even the implied * ************************ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. * See the GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with GNU CC; see the file COPYING. If not, write to * the Free Software Foundation, 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. * * Please send any bug reports or fixes you make to the * email address(es): * lksctp developers <lksctp-developers@lists.sourceforge.net> * * Or submit a bug report through the following website: * http://www.sf.net/projects/lksctp * * Written or modified by: * Jon Grimm <jgrimm@us.ibm.com> * La Monte H.P. Yarroll <piggy@acm.org> * Sridhar Samudrala <sri@us.ibm.com> * * Any bugs reported given to us we will try to fix... any fixes shared will * be incorporated into the next SCTP release. */ |
5a0e3ad6a include cleanup: ... |
43 |
#include <linux/slab.h> |
1da177e4c Linux-2.6.12-rc2 |
44 45 46 47 48 49 50 51 52 |
#include <linux/types.h> #include <linux/skbuff.h> #include <net/sock.h> #include <net/sctp/structs.h> #include <net/sctp/sctp.h> #include <net/sctp/sm.h> /* Forward declarations for internal helpers. */ static struct sctp_ulpevent * sctp_ulpq_reasm(struct sctp_ulpq *ulpq, |
8728b834b [NET]: Kill skb->... |
53 |
struct sctp_ulpevent *); |
1da177e4c Linux-2.6.12-rc2 |
54 |
static struct sctp_ulpevent * sctp_ulpq_order(struct sctp_ulpq *, |
8728b834b [NET]: Kill skb->... |
55 |
struct sctp_ulpevent *); |
ef5d4cf2f [SCTP]: Flush fra... |
56 |
static void sctp_ulpq_reasm_drain(struct sctp_ulpq *ulpq); |
1da177e4c Linux-2.6.12-rc2 |
57 58 59 60 61 62 63 64 65 66 67 68 69 |
/* 1st Level Abstractions */ /* Initialize a ULP queue from a block of memory. */ struct sctp_ulpq *sctp_ulpq_init(struct sctp_ulpq *ulpq, struct sctp_association *asoc) { memset(ulpq, 0, sizeof(struct sctp_ulpq)); ulpq->asoc = asoc; skb_queue_head_init(&ulpq->reasm); skb_queue_head_init(&ulpq->lobby); ulpq->pd_mode = 0; |
1da177e4c Linux-2.6.12-rc2 |
70 71 72 73 74 75 |
return ulpq; } /* Flush the reassembly and ordering queues. */ |
0b58a8114 [SCTP]: Clean up ... |
76 |
void sctp_ulpq_flush(struct sctp_ulpq *ulpq) |
1da177e4c Linux-2.6.12-rc2 |
77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 |
{ struct sk_buff *skb; struct sctp_ulpevent *event; while ((skb = __skb_dequeue(&ulpq->lobby)) != NULL) { event = sctp_skb2event(skb); sctp_ulpevent_free(event); } while ((skb = __skb_dequeue(&ulpq->reasm)) != NULL) { event = sctp_skb2event(skb); sctp_ulpevent_free(event); } } /* Dispose of a ulpqueue. */ void sctp_ulpq_free(struct sctp_ulpq *ulpq) { sctp_ulpq_flush(ulpq); |
1da177e4c Linux-2.6.12-rc2 |
97 98 99 100 |
} /* Process an incoming DATA chunk. */ int sctp_ulpq_tail_data(struct sctp_ulpq *ulpq, struct sctp_chunk *chunk, |
dd0fc66fb [PATCH] gfp flags... |
101 |
gfp_t gfp) |
1da177e4c Linux-2.6.12-rc2 |
102 103 |
{ struct sk_buff_head temp; |
1da177e4c Linux-2.6.12-rc2 |
104 |
struct sctp_ulpevent *event; |
d003b41b8 sctp: fix associa... |
105 |
int event_eor = 0; |
1da177e4c Linux-2.6.12-rc2 |
106 |
|
1da177e4c Linux-2.6.12-rc2 |
107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 |
/* Create an event from the incoming chunk. */ event = sctp_ulpevent_make_rcvmsg(chunk->asoc, chunk, gfp); if (!event) return -ENOMEM; /* Do reassembly if needed. */ event = sctp_ulpq_reasm(ulpq, event); /* Do ordering if needed. */ if ((event) && (event->msg_flags & MSG_EOR)){ /* Create a temporary list to collect chunks on. */ skb_queue_head_init(&temp); __skb_queue_tail(&temp, sctp_event2skb(event)); event = sctp_ulpq_order(ulpq, event); } |
8728b834b [NET]: Kill skb->... |
123 124 125 |
/* Send event to the ULP. 'event' is the sctp_ulpevent for * very first SKB on the 'temp' list. */ |
d003b41b8 sctp: fix associa... |
126 127 |
if (event) { event_eor = (event->msg_flags & MSG_EOR) ? 1 : 0; |
1da177e4c Linux-2.6.12-rc2 |
128 |
sctp_ulpq_tail_event(ulpq, event); |
d003b41b8 sctp: fix associa... |
129 |
} |
1da177e4c Linux-2.6.12-rc2 |
130 |
|
d003b41b8 sctp: fix associa... |
131 |
return event_eor; |
1da177e4c Linux-2.6.12-rc2 |
132 133 134 135 136 137 |
} /* Add a new event for propagation to the ULP. */ /* Clear the partial delivery mode for this socket. Note: This * assumes that no association is currently in partial delivery mode. */ |
b6e1331f3 [SCTP]: Implement... |
138 |
int sctp_clear_pd(struct sock *sk, struct sctp_association *asoc) |
1da177e4c Linux-2.6.12-rc2 |
139 140 |
{ struct sctp_sock *sp = sctp_sk(sk); |
b6e1331f3 [SCTP]: Implement... |
141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 |
if (atomic_dec_and_test(&sp->pd_mode)) { /* This means there are no other associations in PD, so * we can go ahead and clear out the lobby in one shot */ if (!skb_queue_empty(&sp->pd_lobby)) { struct list_head *list; sctp_skb_list_tail(&sp->pd_lobby, &sk->sk_receive_queue); list = (struct list_head *)&sctp_sk(sk)->pd_lobby; INIT_LIST_HEAD(list); return 1; } } else { /* There are other associations in PD, so we only need to * pull stuff out of the lobby that belongs to the * associations that is exiting PD (all of its notifications * are posted here). */ if (!skb_queue_empty(&sp->pd_lobby) && asoc) { struct sk_buff *skb, *tmp; struct sctp_ulpevent *event; sctp_skb_for_each(skb, &sp->pd_lobby, tmp) { event = sctp_skb2event(skb); if (event->asoc == asoc) { __skb_unlink(skb, &sp->pd_lobby); __skb_queue_tail(&sk->sk_receive_queue, skb); } } } |
1da177e4c Linux-2.6.12-rc2 |
171 |
} |
b6e1331f3 [SCTP]: Implement... |
172 |
|
1da177e4c Linux-2.6.12-rc2 |
173 174 |
return 0; } |
d49d91d79 [SCTP]: Implement... |
175 176 177 178 179 180 181 182 |
/* Set the pd_mode on the socket and ulpq */ static void sctp_ulpq_set_pd(struct sctp_ulpq *ulpq) { struct sctp_sock *sp = sctp_sk(ulpq->asoc->base.sk); atomic_inc(&sp->pd_mode); ulpq->pd_mode = 1; } |
1da177e4c Linux-2.6.12-rc2 |
183 184 185 186 |
/* Clear the pd_mode and restart any pending messages waiting for delivery. */ static int sctp_ulpq_clear_pd(struct sctp_ulpq *ulpq) { ulpq->pd_mode = 0; |
ef5d4cf2f [SCTP]: Flush fra... |
187 |
sctp_ulpq_reasm_drain(ulpq); |
b6e1331f3 [SCTP]: Implement... |
188 |
return sctp_clear_pd(ulpq->asoc->base.sk, ulpq->asoc); |
1da177e4c Linux-2.6.12-rc2 |
189 |
} |
8728b834b [NET]: Kill skb->... |
190 191 192 |
/* If the SKB of 'event' is on a list, it is the first such member * of that list. */ |
1da177e4c Linux-2.6.12-rc2 |
193 194 195 |
int sctp_ulpq_tail_event(struct sctp_ulpq *ulpq, struct sctp_ulpevent *event) { struct sock *sk = ulpq->asoc->base.sk; |
8728b834b [NET]: Kill skb->... |
196 197 |
struct sk_buff_head *queue, *skb_list; struct sk_buff *skb = sctp_event2skb(event); |
1da177e4c Linux-2.6.12-rc2 |
198 |
int clear_pd = 0; |
8728b834b [NET]: Kill skb->... |
199 |
skb_list = (struct sk_buff_head *) skb->prev; |
1da177e4c Linux-2.6.12-rc2 |
200 201 202 203 204 205 206 207 208 209 210 211 212 213 |
/* If the socket is just going to throw this away, do not * even try to deliver it. */ if (sock_flag(sk, SOCK_DEAD) || (sk->sk_shutdown & RCV_SHUTDOWN)) goto out_free; /* Check if the user wishes to receive this event. */ if (!sctp_ulpevent_is_enabled(event, &sctp_sk(sk)->subscribe)) goto out_free; /* If we are in partial delivery mode, post to the lobby until * partial delivery is cleared, unless, of course _this_ is * the association the cause of the partial delivery. */ |
b6e1331f3 [SCTP]: Implement... |
214 |
if (atomic_read(&sctp_sk(sk)->pd_mode) == 0) { |
1da177e4c Linux-2.6.12-rc2 |
215 |
queue = &sk->sk_receive_queue; |
b6e1331f3 [SCTP]: Implement... |
216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 |
} else { if (ulpq->pd_mode) { /* If the association is in partial delivery, we * need to finish delivering the partially processed * packet before passing any other data. This is * because we don't truly support stream interleaving. */ if ((event->msg_flags & MSG_NOTIFICATION) || (SCTP_DATA_NOT_FRAG == (event->msg_flags & SCTP_DATA_FRAG_MASK))) queue = &sctp_sk(sk)->pd_lobby; else { clear_pd = event->msg_flags & MSG_EOR; queue = &sk->sk_receive_queue; } } else { /* * If fragment interleave is enabled, we |
25985edce Fix common misspe... |
234 |
* can queue this to the receive queue instead |
b6e1331f3 [SCTP]: Implement... |
235 236 237 238 239 240 |
* of the lobby. */ if (sctp_sk(sk)->frag_interleave) queue = &sk->sk_receive_queue; else queue = &sctp_sk(sk)->pd_lobby; |
1da177e4c Linux-2.6.12-rc2 |
241 |
} |
b6e1331f3 [SCTP]: Implement... |
242 |
} |
1da177e4c Linux-2.6.12-rc2 |
243 244 245 246 |
/* If we are harvesting multiple skbs they will be * collected on a list. */ |
8728b834b [NET]: Kill skb->... |
247 248 |
if (skb_list) sctp_skb_list_tail(skb_list, queue); |
1da177e4c Linux-2.6.12-rc2 |
249 |
else |
8728b834b [NET]: Kill skb->... |
250 |
__skb_queue_tail(queue, skb); |
1da177e4c Linux-2.6.12-rc2 |
251 252 253 254 255 256 257 258 259 260 261 262 263 |
/* Did we just complete partial delivery and need to get * rolling again? Move pending data to the receive * queue. */ if (clear_pd) sctp_ulpq_clear_pd(ulpq); if (queue == &sk->sk_receive_queue) sk->sk_data_ready(sk, 0); return 1; out_free: |
8728b834b [NET]: Kill skb->... |
264 265 |
if (skb_list) sctp_queue_purge_ulpevents(skb_list); |
1da177e4c Linux-2.6.12-rc2 |
266 267 |
else sctp_ulpevent_free(event); |
8728b834b [NET]: Kill skb->... |
268 |
|
1da177e4c Linux-2.6.12-rc2 |
269 270 271 272 273 274 |
return 0; } /* 2nd Level Abstractions */ /* Helper function to store chunks that need to be reassembled. */ |
01f2d3849 [SCTP]: Kill sill... |
275 |
static void sctp_ulpq_store_reasm(struct sctp_ulpq *ulpq, |
1da177e4c Linux-2.6.12-rc2 |
276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 |
struct sctp_ulpevent *event) { struct sk_buff *pos; struct sctp_ulpevent *cevent; __u32 tsn, ctsn; tsn = event->tsn; /* See if it belongs at the end. */ pos = skb_peek_tail(&ulpq->reasm); if (!pos) { __skb_queue_tail(&ulpq->reasm, sctp_event2skb(event)); return; } /* Short circuit just dropping it at the end. */ cevent = sctp_skb2event(pos); ctsn = cevent->tsn; if (TSN_lt(ctsn, tsn)) { __skb_queue_tail(&ulpq->reasm, sctp_event2skb(event)); return; } /* Find the right place in this list. We store them by TSN. */ skb_queue_walk(&ulpq->reasm, pos) { cevent = sctp_skb2event(pos); ctsn = cevent->tsn; if (TSN_lt(tsn, ctsn)) break; } /* Insert before pos. */ |
43f59c893 net: Remove __skb... |
309 |
__skb_queue_before(&ulpq->reasm, pos, sctp_event2skb(event)); |
1da177e4c Linux-2.6.12-rc2 |
310 311 312 313 314 315 316 317 318 319 |
} /* Helper function to return an event corresponding to the reassembled * datagram. * This routine creates a re-assembled skb given the first and last skb's * as stored in the reassembly queue. The skb's may be non-linear if the sctp * payload was fragmented on the way and ip had to reassemble them. * We add the rest of skb's to the first skb's fraglist. */ |
b01a24078 sctp: Make the mi... |
320 321 322 |
static struct sctp_ulpevent *sctp_make_reassembled_event(struct net *net, struct sk_buff_head *queue, struct sk_buff *f_frag, struct sk_buff *l_frag) |
1da177e4c Linux-2.6.12-rc2 |
323 324 |
{ struct sk_buff *pos; |
672e7cca1 [SCTP]: Prevent p... |
325 |
struct sk_buff *new = NULL; |
1da177e4c Linux-2.6.12-rc2 |
326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 |
struct sctp_ulpevent *event; struct sk_buff *pnext, *last; struct sk_buff *list = skb_shinfo(f_frag)->frag_list; /* Store the pointer to the 2nd skb */ if (f_frag == l_frag) pos = NULL; else pos = f_frag->next; /* Get the last skb in the f_frag's frag_list if present. */ for (last = list; list; last = list, list = list->next); /* Add the list of remaining fragments to the first fragments * frag_list. */ if (last) last->next = pos; |
d808ad9ab [NET] SCTP: Fix w... |
344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 |
else { if (skb_cloned(f_frag)) { /* This is a cloned skb, we can't just modify * the frag_list. We need a new skb to do that. * Instead of calling skb_unshare(), we'll do it * ourselves since we need to delay the free. */ new = skb_copy(f_frag, GFP_ATOMIC); if (!new) return NULL; /* try again later */ sctp_skb_set_owner_r(new, f_frag->sk); skb_shinfo(new)->frag_list = pos; } else skb_shinfo(f_frag)->frag_list = pos; } |
1da177e4c Linux-2.6.12-rc2 |
361 362 |
/* Remove the first fragment from the reassembly queue. */ |
8728b834b [NET]: Kill skb->... |
363 |
__skb_unlink(f_frag, queue); |
672e7cca1 [SCTP]: Prevent p... |
364 |
|
d808ad9ab [NET] SCTP: Fix w... |
365 366 367 368 369 |
/* if we did unshare, then free the old skb and re-assign */ if (new) { kfree_skb(f_frag); f_frag = new; } |
672e7cca1 [SCTP]: Prevent p... |
370 |
|
1da177e4c Linux-2.6.12-rc2 |
371 372 373 374 375 376 377 378 379 |
while (pos) { pnext = pos->next; /* Update the len and data_len fields of the first fragment. */ f_frag->len += pos->len; f_frag->data_len += pos->len; /* Remove the fragment from the reassembly queue. */ |
8728b834b [NET]: Kill skb->... |
380 |
__skb_unlink(pos, queue); |
d808ad9ab [NET] SCTP: Fix w... |
381 |
|
1da177e4c Linux-2.6.12-rc2 |
382 383 384 385 386 |
/* Break if we have reached the last fragment. */ if (pos == l_frag) break; pos->next = pnext; pos = pnext; |
3ff50b799 [NET]: cleanup ex... |
387 |
} |
1da177e4c Linux-2.6.12-rc2 |
388 389 |
event = sctp_skb2event(f_frag); |
b01a24078 sctp: Make the mi... |
390 |
SCTP_INC_STATS(net, SCTP_MIB_REASMUSRMSGS); |
1da177e4c Linux-2.6.12-rc2 |
391 392 393 394 395 396 397 398 |
return event; } /* Helper function to check if an incoming chunk has filled up the last * missing fragment in a SCTP datagram and return the corresponding event. */ |
01f2d3849 [SCTP]: Kill sill... |
399 |
static struct sctp_ulpevent *sctp_ulpq_retrieve_reassembled(struct sctp_ulpq *ulpq) |
1da177e4c Linux-2.6.12-rc2 |
400 401 402 403 404 405 |
{ struct sk_buff *pos; struct sctp_ulpevent *cevent; struct sk_buff *first_frag = NULL; __u32 ctsn, next_tsn; struct sctp_ulpevent *retval = NULL; |
d49d91d79 [SCTP]: Implement... |
406 407 408 409 410 |
struct sk_buff *pd_first = NULL; struct sk_buff *pd_last = NULL; size_t pd_len = 0; struct sctp_association *asoc; u32 pd_point; |
1da177e4c Linux-2.6.12-rc2 |
411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 |
/* Initialized to 0 just to avoid compiler warning message. Will * never be used with this value. It is referenced only after it * is set when we find the first fragment of a message. */ next_tsn = 0; /* The chunks are held in the reasm queue sorted by TSN. * Walk through the queue sequentially and look for a sequence of * fragmented chunks that complete a datagram. * 'first_frag' and next_tsn are reset when we find a chunk which * is the first fragment of a datagram. Once these 2 fields are set * we expect to find the remaining middle fragments and the last * fragment in order. If not, first_frag is reset to NULL and we * start the next pass when we find another first fragment. |
d49d91d79 [SCTP]: Implement... |
426 427 428 429 |
* * There is a potential to do partial delivery if user sets * SCTP_PARTIAL_DELIVERY_POINT option. Lets count some things here * to see if can do PD. |
1da177e4c Linux-2.6.12-rc2 |
430 431 432 433 434 435 436 |
*/ skb_queue_walk(&ulpq->reasm, pos) { cevent = sctp_skb2event(pos); ctsn = cevent->tsn; switch (cevent->msg_flags & SCTP_DATA_FRAG_MASK) { case SCTP_DATA_FIRST_FRAG: |
d49d91d79 [SCTP]: Implement... |
437 438 439 440 441 442 443 444 445 446 447 448 449 |
/* If this "FIRST_FRAG" is the first * element in the queue, then count it towards * possible PD. */ if (pos == ulpq->reasm.next) { pd_first = pos; pd_last = pos; pd_len = pos->len; } else { pd_first = NULL; pd_last = NULL; pd_len = 0; } |
1da177e4c Linux-2.6.12-rc2 |
450 451 452 453 454 |
first_frag = pos; next_tsn = ctsn + 1; break; case SCTP_DATA_MIDDLE_FRAG: |
d49d91d79 [SCTP]: Implement... |
455 |
if ((first_frag) && (ctsn == next_tsn)) { |
1da177e4c Linux-2.6.12-rc2 |
456 |
next_tsn++; |
d49d91d79 [SCTP]: Implement... |
457 458 459 460 461 |
if (pd_first) { pd_last = pos; pd_len += pos->len; } } else |
1da177e4c Linux-2.6.12-rc2 |
462 463 464 465 466 467 468 469 470 |
first_frag = NULL; break; case SCTP_DATA_LAST_FRAG: if (first_frag && (ctsn == next_tsn)) goto found; else first_frag = NULL; break; |
3ff50b799 [NET]: cleanup ex... |
471 |
} |
d49d91d79 [SCTP]: Implement... |
472 473 474 475 476 477 478 479 480 481 482 483 |
} asoc = ulpq->asoc; if (pd_first) { /* Make sure we can enter partial deliver. * We can trigger partial delivery only if framgent * interleave is set, or the socket is not already * in partial delivery. */ if (!sctp_sk(asoc->base.sk)->frag_interleave && atomic_read(&sctp_sk(asoc->base.sk)->pd_mode)) goto done; |
1da177e4c Linux-2.6.12-rc2 |
484 |
|
d49d91d79 [SCTP]: Implement... |
485 486 487 |
cevent = sctp_skb2event(pd_first); pd_point = sctp_sk(asoc->base.sk)->pd_point; if (pd_point && pd_point <= pd_len) { |
b01a24078 sctp: Make the mi... |
488 489 |
retval = sctp_make_reassembled_event(sock_net(asoc->base.sk), &ulpq->reasm, |
d49d91d79 [SCTP]: Implement... |
490 491 492 493 494 |
pd_first, pd_last); if (retval) sctp_ulpq_set_pd(ulpq); } |
1da177e4c Linux-2.6.12-rc2 |
495 496 497 498 |
} done: return retval; found: |
b01a24078 sctp: Make the mi... |
499 500 |
retval = sctp_make_reassembled_event(sock_net(ulpq->asoc->base.sk), &ulpq->reasm, first_frag, pos); |
1da177e4c Linux-2.6.12-rc2 |
501 502 503 504 505 506 |
if (retval) retval->msg_flags |= MSG_EOR; goto done; } /* Retrieve the next set of fragments of a partial message. */ |
01f2d3849 [SCTP]: Kill sill... |
507 |
static struct sctp_ulpevent *sctp_ulpq_retrieve_partial(struct sctp_ulpq *ulpq) |
1da177e4c Linux-2.6.12-rc2 |
508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 |
{ struct sk_buff *pos, *last_frag, *first_frag; struct sctp_ulpevent *cevent; __u32 ctsn, next_tsn; int is_last; struct sctp_ulpevent *retval; /* The chunks are held in the reasm queue sorted by TSN. * Walk through the queue sequentially and look for the first * sequence of fragmented chunks. */ if (skb_queue_empty(&ulpq->reasm)) return NULL; last_frag = first_frag = NULL; retval = NULL; next_tsn = 0; is_last = 0; skb_queue_walk(&ulpq->reasm, pos) { cevent = sctp_skb2event(pos); ctsn = cevent->tsn; switch (cevent->msg_flags & SCTP_DATA_FRAG_MASK) { |
d003b41b8 sctp: fix associa... |
533 534 535 536 |
case SCTP_DATA_FIRST_FRAG: if (!first_frag) return NULL; goto done; |
1da177e4c Linux-2.6.12-rc2 |
537 538 539 540 541 |
case SCTP_DATA_MIDDLE_FRAG: if (!first_frag) { first_frag = pos; next_tsn = ctsn + 1; last_frag = pos; |
d003b41b8 sctp: fix associa... |
542 |
} else if (next_tsn == ctsn) { |
1da177e4c Linux-2.6.12-rc2 |
543 |
next_tsn++; |
d003b41b8 sctp: fix associa... |
544 545 |
last_frag = pos; } else |
1da177e4c Linux-2.6.12-rc2 |
546 547 548 549 550 551 552 553 554 555 556 557 |
goto done; break; case SCTP_DATA_LAST_FRAG: if (!first_frag) first_frag = pos; else if (ctsn != next_tsn) goto done; last_frag = pos; is_last = 1; goto done; default: return NULL; |
3ff50b799 [NET]: cleanup ex... |
558 |
} |
1da177e4c Linux-2.6.12-rc2 |
559 560 561 562 563 564 |
} /* We have the reassembled event. There is no need to look * further. */ done: |
b01a24078 sctp: Make the mi... |
565 566 |
retval = sctp_make_reassembled_event(sock_net(ulpq->asoc->base.sk), &ulpq->reasm, first_frag, last_frag); |
1da177e4c Linux-2.6.12-rc2 |
567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 |
if (retval && is_last) retval->msg_flags |= MSG_EOR; return retval; } /* Helper function to reassemble chunks. Hold chunks on the reasm queue that * need reassembling. */ static struct sctp_ulpevent *sctp_ulpq_reasm(struct sctp_ulpq *ulpq, struct sctp_ulpevent *event) { struct sctp_ulpevent *retval = NULL; /* Check if this is part of a fragmented message. */ if (SCTP_DATA_NOT_FRAG == (event->msg_flags & SCTP_DATA_FRAG_MASK)) { event->msg_flags |= MSG_EOR; return event; } sctp_ulpq_store_reasm(ulpq, event); if (!ulpq->pd_mode) retval = sctp_ulpq_retrieve_reassembled(ulpq); else { __u32 ctsn, ctsnap; /* Do not even bother unless this is the next tsn to * be delivered. */ ctsn = event->tsn; ctsnap = sctp_tsnmap_get_ctsn(&ulpq->asoc->peer.tsn_map); if (TSN_lte(ctsn, ctsnap)) retval = sctp_ulpq_retrieve_partial(ulpq); } return retval; } /* Retrieve the first part (sequential fragments) for partial delivery. */ |
01f2d3849 [SCTP]: Kill sill... |
607 |
static struct sctp_ulpevent *sctp_ulpq_retrieve_first(struct sctp_ulpq *ulpq) |
1da177e4c Linux-2.6.12-rc2 |
608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 |
{ struct sk_buff *pos, *last_frag, *first_frag; struct sctp_ulpevent *cevent; __u32 ctsn, next_tsn; struct sctp_ulpevent *retval; /* The chunks are held in the reasm queue sorted by TSN. * Walk through the queue sequentially and look for a sequence of * fragmented chunks that start a datagram. */ if (skb_queue_empty(&ulpq->reasm)) return NULL; last_frag = first_frag = NULL; retval = NULL; next_tsn = 0; skb_queue_walk(&ulpq->reasm, pos) { cevent = sctp_skb2event(pos); ctsn = cevent->tsn; switch (cevent->msg_flags & SCTP_DATA_FRAG_MASK) { case SCTP_DATA_FIRST_FRAG: if (!first_frag) { first_frag = pos; next_tsn = ctsn + 1; last_frag = pos; } else goto done; break; case SCTP_DATA_MIDDLE_FRAG: if (!first_frag) return NULL; if (ctsn == next_tsn) { next_tsn++; last_frag = pos; } else goto done; break; |
d003b41b8 sctp: fix associa... |
649 650 651 652 653 654 655 |
case SCTP_DATA_LAST_FRAG: if (!first_frag) return NULL; else goto done; break; |
1da177e4c Linux-2.6.12-rc2 |
656 657 |
default: return NULL; |
3ff50b799 [NET]: cleanup ex... |
658 |
} |
1da177e4c Linux-2.6.12-rc2 |
659 660 661 662 663 664 |
} /* We have the reassembled event. There is no need to look * further. */ done: |
b01a24078 sctp: Make the mi... |
665 666 |
retval = sctp_make_reassembled_event(sock_net(ulpq->asoc->base.sk), &ulpq->reasm, first_frag, last_frag); |
1da177e4c Linux-2.6.12-rc2 |
667 668 |
return retval; } |
ea2dfb373 SCTP: properly cl... |
669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 |
/* * Flush out stale fragments from the reassembly queue when processing * a Forward TSN. * * RFC 3758, Section 3.6 * * After receiving and processing a FORWARD TSN, the data receiver MUST * take cautions in updating its re-assembly queue. The receiver MUST * remove any partially reassembled message, which is still missing one * or more TSNs earlier than or equal to the new cumulative TSN point. * In the event that the receiver has invoked the partial delivery API, * a notification SHOULD also be generated to inform the upper layer API * that the message being partially delivered will NOT be completed. */ void sctp_ulpq_reasm_flushtsn(struct sctp_ulpq *ulpq, __u32 fwd_tsn) { struct sk_buff *pos, *tmp; struct sctp_ulpevent *event; __u32 tsn; if (skb_queue_empty(&ulpq->reasm)) return; skb_queue_walk_safe(&ulpq->reasm, pos, tmp) { event = sctp_skb2event(pos); tsn = event->tsn; /* Since the entire message must be abandoned by the * sender (item A3 in Section 3.5, RFC 3758), we can * free all fragments on the list that are less then * or equal to ctsn_point */ if (TSN_lte(tsn, fwd_tsn)) { __skb_unlink(pos, &ulpq->reasm); sctp_ulpevent_free(event); } else break; } } |
ef5d4cf2f [SCTP]: Flush fra... |
708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 |
/* * Drain the reassembly queue. If we just cleared parted delivery, it * is possible that the reassembly queue will contain already reassembled * messages. Retrieve any such messages and give them to the user. */ static void sctp_ulpq_reasm_drain(struct sctp_ulpq *ulpq) { struct sctp_ulpevent *event = NULL; struct sk_buff_head temp; if (skb_queue_empty(&ulpq->reasm)) return; while ((event = sctp_ulpq_retrieve_reassembled(ulpq)) != NULL) { /* Do ordering if needed. */ if ((event) && (event->msg_flags & MSG_EOR)){ skb_queue_head_init(&temp); __skb_queue_tail(&temp, sctp_event2skb(event)); event = sctp_ulpq_order(ulpq, event); } /* Send event to the ULP. 'event' is the * sctp_ulpevent for very first SKB on the temp' list. */ if (event) sctp_ulpq_tail_event(ulpq, event); } } |
1da177e4c Linux-2.6.12-rc2 |
737 738 739 |
/* Helper function to gather skbs that have possibly become * ordered by an an incoming chunk. */ |
01f2d3849 [SCTP]: Kill sill... |
740 |
static void sctp_ulpq_retrieve_ordered(struct sctp_ulpq *ulpq, |
1da177e4c Linux-2.6.12-rc2 |
741 742 |
struct sctp_ulpevent *event) { |
8728b834b [NET]: Kill skb->... |
743 |
struct sk_buff_head *event_list; |
1da177e4c Linux-2.6.12-rc2 |
744 745 746 |
struct sk_buff *pos, *tmp; struct sctp_ulpevent *cevent; struct sctp_stream *in; |
efea2c6b2 sctp: several dec... |
747 |
__u16 sid, csid, cssn; |
1da177e4c Linux-2.6.12-rc2 |
748 749 |
sid = event->stream; |
1da177e4c Linux-2.6.12-rc2 |
750 |
in = &ulpq->asoc->ssnmap->in; |
8728b834b [NET]: Kill skb->... |
751 |
event_list = (struct sk_buff_head *) sctp_event2skb(event)->prev; |
1da177e4c Linux-2.6.12-rc2 |
752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 |
/* We are holding the chunks by stream, by SSN. */ sctp_skb_for_each(pos, &ulpq->lobby, tmp) { cevent = (struct sctp_ulpevent *) pos->cb; csid = cevent->stream; cssn = cevent->ssn; /* Have we gone too far? */ if (csid > sid) break; /* Have we not gone far enough? */ if (csid < sid) continue; if (cssn != sctp_ssn_peek(in, sid)) break; /* Found it, so mark in the ssnmap. */ sctp_ssn_next(in, sid); |
8728b834b [NET]: Kill skb->... |
771 |
__skb_unlink(pos, &ulpq->lobby); |
1da177e4c Linux-2.6.12-rc2 |
772 773 |
/* Attach all gathered skbs to the event. */ |
8728b834b [NET]: Kill skb->... |
774 |
__skb_queue_tail(event_list, pos); |
1da177e4c Linux-2.6.12-rc2 |
775 776 777 778 |
} } /* Helper function to store chunks needing ordering. */ |
01f2d3849 [SCTP]: Kill sill... |
779 |
static void sctp_ulpq_store_ordered(struct sctp_ulpq *ulpq, |
1da177e4c Linux-2.6.12-rc2 |
780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 |
struct sctp_ulpevent *event) { struct sk_buff *pos; struct sctp_ulpevent *cevent; __u16 sid, csid; __u16 ssn, cssn; pos = skb_peek_tail(&ulpq->lobby); if (!pos) { __skb_queue_tail(&ulpq->lobby, sctp_event2skb(event)); return; } sid = event->stream; ssn = event->ssn; |
d808ad9ab [NET] SCTP: Fix w... |
795 |
|
1da177e4c Linux-2.6.12-rc2 |
796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 |
cevent = (struct sctp_ulpevent *) pos->cb; csid = cevent->stream; cssn = cevent->ssn; if (sid > csid) { __skb_queue_tail(&ulpq->lobby, sctp_event2skb(event)); return; } if ((sid == csid) && SSN_lt(cssn, ssn)) { __skb_queue_tail(&ulpq->lobby, sctp_event2skb(event)); return; } /* Find the right place in this list. We store them by * stream ID and then by SSN. */ skb_queue_walk(&ulpq->lobby, pos) { cevent = (struct sctp_ulpevent *) pos->cb; csid = cevent->stream; cssn = cevent->ssn; if (csid > sid) break; if (csid == sid && SSN_lt(ssn, cssn)) break; } /* Insert before pos. */ |
43f59c893 net: Remove __skb... |
825 |
__skb_queue_before(&ulpq->lobby, pos, sctp_event2skb(event)); |
1da177e4c Linux-2.6.12-rc2 |
826 827 828 |
} static struct sctp_ulpevent *sctp_ulpq_order(struct sctp_ulpq *ulpq, |
8728b834b [NET]: Kill skb->... |
829 |
struct sctp_ulpevent *event) |
1da177e4c Linux-2.6.12-rc2 |
830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 |
{ __u16 sid, ssn; struct sctp_stream *in; /* Check if this message needs ordering. */ if (SCTP_DATA_UNORDERED & event->msg_flags) return event; /* Note: The stream ID must be verified before this routine. */ sid = event->stream; ssn = event->ssn; in = &ulpq->asoc->ssnmap->in; /* Is this the expected SSN for this stream ID? */ if (ssn != sctp_ssn_peek(in, sid)) { /* We've received something out of order, so find where it * needs to be placed. We order by stream and then by SSN. */ sctp_ulpq_store_ordered(ulpq, event); return NULL; } /* Mark that the next chunk has been found. */ sctp_ssn_next(in, sid); /* Go find any other chunks that were waiting for * ordering. */ sctp_ulpq_retrieve_ordered(ulpq, event); return event; } /* Helper function to gather skbs that have possibly become * ordered by forward tsn skipping their dependencies. */ |
01f2d3849 [SCTP]: Kill sill... |
866 |
static void sctp_ulpq_reap_ordered(struct sctp_ulpq *ulpq, __u16 sid) |
1da177e4c Linux-2.6.12-rc2 |
867 868 869 |
{ struct sk_buff *pos, *tmp; struct sctp_ulpevent *cevent; |
8728b834b [NET]: Kill skb->... |
870 |
struct sctp_ulpevent *event; |
1da177e4c Linux-2.6.12-rc2 |
871 872 |
struct sctp_stream *in; struct sk_buff_head temp; |
c068be549 [SCTP]: Correctly... |
873 |
struct sk_buff_head *lobby = &ulpq->lobby; |
1da177e4c Linux-2.6.12-rc2 |
874 875 876 877 878 |
__u16 csid, cssn; in = &ulpq->asoc->ssnmap->in; /* We are holding the chunks by stream, by SSN. */ |
8728b834b [NET]: Kill skb->... |
879 880 |
skb_queue_head_init(&temp); event = NULL; |
c068be549 [SCTP]: Correctly... |
881 |
sctp_skb_for_each(pos, lobby, tmp) { |
1da177e4c Linux-2.6.12-rc2 |
882 883 884 |
cevent = (struct sctp_ulpevent *) pos->cb; csid = cevent->stream; cssn = cevent->ssn; |
ea2dfb373 SCTP: properly cl... |
885 886 |
/* Have we gone too far? */ if (csid > sid) |
1da177e4c Linux-2.6.12-rc2 |
887 |
break; |
ea2dfb373 SCTP: properly cl... |
888 889 890 891 892 |
/* Have we not gone far enough? */ if (csid < sid) continue; /* see if this ssn has been marked by skipping */ |
c068be549 [SCTP]: Correctly... |
893 |
if (!SSN_lt(cssn, sctp_ssn_peek(in, csid))) |
ea2dfb373 SCTP: properly cl... |
894 |
break; |
1da177e4c Linux-2.6.12-rc2 |
895 |
|
c068be549 [SCTP]: Correctly... |
896 |
__skb_unlink(pos, lobby); |
ea2dfb373 SCTP: properly cl... |
897 |
if (!event) |
1da177e4c Linux-2.6.12-rc2 |
898 899 |
/* Create a temporary list to collect chunks on. */ event = sctp_skb2event(pos); |
ea2dfb373 SCTP: properly cl... |
900 901 902 |
/* Attach all gathered skbs to the event. */ __skb_queue_tail(&temp, pos); |
1da177e4c Linux-2.6.12-rc2 |
903 |
} |
c068be549 [SCTP]: Correctly... |
904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 |
/* If we didn't reap any data, see if the next expected SSN * is next on the queue and if so, use that. */ if (event == NULL && pos != (struct sk_buff *)lobby) { cevent = (struct sctp_ulpevent *) pos->cb; csid = cevent->stream; cssn = cevent->ssn; if (csid == sid && cssn == sctp_ssn_peek(in, csid)) { sctp_ssn_next(in, csid); __skb_unlink(pos, lobby); __skb_queue_tail(&temp, pos); event = sctp_skb2event(pos); } } |
8728b834b [NET]: Kill skb->... |
919 920 921 |
/* Send event to the ULP. 'event' is the sctp_ulpevent for * very first SKB on the 'temp' list. */ |
ea2dfb373 SCTP: properly cl... |
922 923 924 |
if (event) { /* see if we have more ordered that we can deliver */ sctp_ulpq_retrieve_ordered(ulpq, event); |
1da177e4c Linux-2.6.12-rc2 |
925 |
sctp_ulpq_tail_event(ulpq, event); |
ea2dfb373 SCTP: properly cl... |
926 |
} |
1da177e4c Linux-2.6.12-rc2 |
927 |
} |
ea2dfb373 SCTP: properly cl... |
928 929 930 |
/* Skip over an SSN. This is used during the processing of * Forwared TSN chunk to skip over the abandoned ordered data */ |
1da177e4c Linux-2.6.12-rc2 |
931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 |
void sctp_ulpq_skip(struct sctp_ulpq *ulpq, __u16 sid, __u16 ssn) { struct sctp_stream *in; /* Note: The stream ID must be verified before this routine. */ in = &ulpq->asoc->ssnmap->in; /* Is this an old SSN? If so ignore. */ if (SSN_lt(ssn, sctp_ssn_peek(in, sid))) return; /* Mark that we are no longer expecting this SSN or lower. */ sctp_ssn_skip(in, sid, ssn); /* Go find any other chunks that were waiting for |
d808ad9ab [NET] SCTP: Fix w... |
946 |
* ordering and deliver them if needed. |
1da177e4c Linux-2.6.12-rc2 |
947 |
*/ |
ea2dfb373 SCTP: properly cl... |
948 |
sctp_ulpq_reap_ordered(ulpq, sid); |
1da177e4c Linux-2.6.12-rc2 |
949 |
} |
16d14ef9f [SCTP]: Consolida... |
950 951 |
static __u16 sctp_ulpq_renege_list(struct sctp_ulpq *ulpq, struct sk_buff_head *list, __u16 needed) |
1da177e4c Linux-2.6.12-rc2 |
952 953 |
{ __u16 freed = 0; |
95ac7b859 sctp: fix associa... |
954 955 |
__u32 tsn, last_tsn; struct sk_buff *skb, *flist, *last; |
1da177e4c Linux-2.6.12-rc2 |
956 957 958 959 |
struct sctp_ulpevent *event; struct sctp_tsnmap *tsnmap; tsnmap = &ulpq->asoc->peer.tsn_map; |
e67f85ecd sctp: fix associa... |
960 |
while ((skb = skb_peek_tail(list)) != NULL) { |
1da177e4c Linux-2.6.12-rc2 |
961 962 |
event = sctp_skb2event(skb); tsn = event->tsn; |
e67f85ecd sctp: fix associa... |
963 964 965 |
/* Don't renege below the Cumulative TSN ACK Point. */ if (TSN_lte(tsn, sctp_tsnmap_get_ctsn(tsnmap))) break; |
95ac7b859 sctp: fix associa... |
966 967 968 969 |
/* Events in ordering queue may have multiple fragments * corresponding to additional TSNs. Sum the total * freed space; find the last TSN. */ |
e67f85ecd sctp: fix associa... |
970 |
freed += skb_headlen(skb); |
95ac7b859 sctp: fix associa... |
971 972 973 974 975 976 977 978 979 980 981 982 |
flist = skb_shinfo(skb)->frag_list; for (last = flist; flist; flist = flist->next) { last = flist; freed += skb_headlen(last); } if (last) last_tsn = sctp_skb2event(last)->tsn; else last_tsn = tsn; /* Unlink the event, then renege all applicable TSNs. */ __skb_unlink(skb, list); |
1da177e4c Linux-2.6.12-rc2 |
983 |
sctp_ulpevent_free(event); |
95ac7b859 sctp: fix associa... |
984 985 986 987 |
while (TSN_lte(tsn, last_tsn)) { sctp_tsnmap_renege(tsnmap, tsn); tsn++; } |
1da177e4c Linux-2.6.12-rc2 |
988 989 990 991 992 993 |
if (freed >= needed) return freed; } return freed; } |
16d14ef9f [SCTP]: Consolida... |
994 995 996 997 998 |
/* Renege 'needed' bytes from the ordering queue. */ static __u16 sctp_ulpq_renege_order(struct sctp_ulpq *ulpq, __u16 needed) { return sctp_ulpq_renege_list(ulpq, &ulpq->lobby, needed); } |
1da177e4c Linux-2.6.12-rc2 |
999 1000 1001 |
/* Renege 'needed' bytes from the reassembly queue. */ static __u16 sctp_ulpq_renege_frags(struct sctp_ulpq *ulpq, __u16 needed) { |
16d14ef9f [SCTP]: Consolida... |
1002 |
return sctp_ulpq_renege_list(ulpq, &ulpq->reasm, needed); |
1da177e4c Linux-2.6.12-rc2 |
1003 1004 1005 1006 |
} /* Partial deliver the first message as there is pressure on rwnd. */ void sctp_ulpq_partial_delivery(struct sctp_ulpq *ulpq, |
dd0fc66fb [PATCH] gfp flags... |
1007 |
gfp_t gfp) |
1da177e4c Linux-2.6.12-rc2 |
1008 1009 1010 |
{ struct sctp_ulpevent *event; struct sctp_association *asoc; |
b6e1331f3 [SCTP]: Implement... |
1011 |
struct sctp_sock *sp; |
d003b41b8 sctp: fix associa... |
1012 1013 |
__u32 ctsn; struct sk_buff *skb; |
1da177e4c Linux-2.6.12-rc2 |
1014 1015 |
asoc = ulpq->asoc; |
b6e1331f3 [SCTP]: Implement... |
1016 |
sp = sctp_sk(asoc->base.sk); |
1da177e4c Linux-2.6.12-rc2 |
1017 |
|
b6e1331f3 [SCTP]: Implement... |
1018 |
/* If the association is already in Partial Delivery mode |
d003b41b8 sctp: fix associa... |
1019 |
* we have nothing to do. |
b6e1331f3 [SCTP]: Implement... |
1020 1021 1022 |
*/ if (ulpq->pd_mode) return; |
1da177e4c Linux-2.6.12-rc2 |
1023 |
|
d003b41b8 sctp: fix associa... |
1024 1025 1026 1027 1028 1029 1030 1031 1032 |
/* Data must be at or below the Cumulative TSN ACK Point to * start partial delivery. */ skb = skb_peek(&asoc->ulpq.reasm); if (skb != NULL) { ctsn = sctp_skb2event(skb)->tsn; if (!TSN_lte(ctsn, sctp_tsnmap_get_ctsn(&asoc->peer.tsn_map))) return; } |
b6e1331f3 [SCTP]: Implement... |
1033 1034 1035 1036 1037 1038 |
/* If the user enabled fragment interleave socket option, * multiple associations can enter partial delivery. * Otherwise, we can only enter partial delivery if the * socket is not in partial deliver mode. */ if (sp->frag_interleave || atomic_read(&sp->pd_mode) == 0) { |
1da177e4c Linux-2.6.12-rc2 |
1039 1040 1041 1042 1043 |
/* Is partial delivery possible? */ event = sctp_ulpq_retrieve_first(ulpq); /* Send event to the ULP. */ if (event) { sctp_ulpq_tail_event(ulpq, event); |
d49d91d79 [SCTP]: Implement... |
1044 |
sctp_ulpq_set_pd(ulpq); |
1da177e4c Linux-2.6.12-rc2 |
1045 1046 1047 1048 1049 1050 1051 |
return; } } } /* Renege some packets to make room for an incoming chunk. */ void sctp_ulpq_renege(struct sctp_ulpq *ulpq, struct sctp_chunk *chunk, |
dd0fc66fb [PATCH] gfp flags... |
1052 |
gfp_t gfp) |
1da177e4c Linux-2.6.12-rc2 |
1053 1054 1055 1056 1057 1058 1059 1060 1061 |
{ struct sctp_association *asoc; __u16 needed, freed; asoc = ulpq->asoc; if (chunk) { needed = ntohs(chunk->chunk_hdr->length); needed -= sizeof(sctp_data_chunk_t); |
d808ad9ab [NET] SCTP: Fix w... |
1062 |
} else |
1da177e4c Linux-2.6.12-rc2 |
1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 |
needed = SCTP_DEFAULT_MAXWINDOW; freed = 0; if (skb_queue_empty(&asoc->base.sk->sk_receive_queue)) { freed = sctp_ulpq_renege_order(ulpq, needed); if (freed < needed) { freed += sctp_ulpq_renege_frags(ulpq, needed - freed); } } /* If able to free enough room, accept this chunk. */ if (chunk && (freed >= needed)) { |
d003b41b8 sctp: fix associa... |
1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 |
int retval; retval = sctp_ulpq_tail_data(ulpq, chunk, gfp); /* * Enter partial delivery if chunk has not been * delivered; otherwise, drain the reassembly queue. */ if (retval <= 0) sctp_ulpq_partial_delivery(ulpq, gfp); else if (retval == 1) sctp_ulpq_reasm_drain(ulpq); |
1da177e4c Linux-2.6.12-rc2 |
1085 |
} |
3ab224be6 [NET] CORE: Intro... |
1086 |
sk_mem_reclaim(asoc->base.sk); |
1da177e4c Linux-2.6.12-rc2 |
1087 1088 1089 1090 1091 1092 1093 |
} /* Notify the application if an association is aborted and in * partial delivery mode. Send up any pending received messages. */ |
dd0fc66fb [PATCH] gfp flags... |
1094 |
void sctp_ulpq_abort_pd(struct sctp_ulpq *ulpq, gfp_t gfp) |
1da177e4c Linux-2.6.12-rc2 |
1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 |
{ struct sctp_ulpevent *ev = NULL; struct sock *sk; if (!ulpq->pd_mode) return; sk = ulpq->asoc->base.sk; if (sctp_ulpevent_type_enabled(SCTP_PARTIAL_DELIVERY_EVENT, &sctp_sk(sk)->subscribe)) ev = sctp_ulpevent_make_pdapi(ulpq->asoc, SCTP_PARTIAL_DELIVERY_ABORTED, gfp); if (ev) __skb_queue_tail(&sk->sk_receive_queue, sctp_event2skb(ev)); /* If there is data waiting, send it up the socket now. */ if (sctp_ulpq_clear_pd(ulpq) || ev) sk->sk_data_ready(sk, 0); } |