Commit | Line | Data |
---|---|---|
17926a79 DH |
1 | /* RxRPC packet reception |
2 | * | |
248f219c | 3 | * Copyright (C) 2007, 2016 Red Hat, Inc. All Rights Reserved. |
17926a79 DH |
4 | * Written by David Howells (dhowells@redhat.com) |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
11 | ||
9b6d5398 JP |
12 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
13 | ||
17926a79 DH |
14 | #include <linux/module.h> |
15 | #include <linux/net.h> | |
16 | #include <linux/skbuff.h> | |
17 | #include <linux/errqueue.h> | |
18 | #include <linux/udp.h> | |
19 | #include <linux/in.h> | |
20 | #include <linux/in6.h> | |
21 | #include <linux/icmp.h> | |
5a0e3ad6 | 22 | #include <linux/gfp.h> |
17926a79 DH |
23 | #include <net/sock.h> |
24 | #include <net/af_rxrpc.h> | |
25 | #include <net/ip.h> | |
1781f7f5 | 26 | #include <net/udp.h> |
0283328e | 27 | #include <net/net_namespace.h> |
17926a79 DH |
28 | #include "ar-internal.h" |
29 | ||
248f219c DH |
30 | static void rxrpc_proto_abort(const char *why, |
31 | struct rxrpc_call *call, rxrpc_seq_t seq) | |
32 | { | |
33 | if (rxrpc_abort_call(why, call, seq, RX_PROTOCOL_ERROR, EBADMSG)) { | |
34 | set_bit(RXRPC_CALL_EV_ABORT, &call->events); | |
35 | rxrpc_queue_call(call); | |
36 | } | |
37 | } | |
38 | ||
8e83134d DH |
39 | /* |
40 | * Ping the other end to fill our RTT cache and to retrieve the rwind | |
41 | * and MTU parameters. | |
42 | */ | |
43 | static void rxrpc_send_ping(struct rxrpc_call *call, struct sk_buff *skb, | |
44 | int skew) | |
45 | { | |
46 | struct rxrpc_skb_priv *sp = rxrpc_skb(skb); | |
fc943f67 | 47 | ktime_t now = skb->tstamp; |
8e83134d | 48 | |
fc943f67 DH |
49 | if (call->peer->rtt_usage < 3 || |
50 | ktime_before(ktime_add_ms(call->peer->rtt_last_req, 1000), now)) | |
51 | rxrpc_propose_ACK(call, RXRPC_ACK_PING, skew, sp->hdr.serial, | |
52 | true, true); | |
8e83134d DH |
53 | } |
54 | ||
17926a79 | 55 | /* |
248f219c | 56 | * Apply a hard ACK by advancing the Tx window. |
17926a79 | 57 | */ |
248f219c | 58 | static void rxrpc_rotate_tx_window(struct rxrpc_call *call, rxrpc_seq_t to) |
17926a79 | 59 | { |
248f219c DH |
60 | struct sk_buff *skb, *list = NULL; |
61 | int ix; | |
70790dbe | 62 | u8 annotation; |
17926a79 | 63 | |
248f219c | 64 | spin_lock(&call->lock); |
17926a79 | 65 | |
248f219c DH |
66 | while (before(call->tx_hard_ack, to)) { |
67 | call->tx_hard_ack++; | |
68 | ix = call->tx_hard_ack & RXRPC_RXTX_BUFF_MASK; | |
69 | skb = call->rxtx_buffer[ix]; | |
70790dbe | 70 | annotation = call->rxtx_annotations[ix]; |
71f3ca40 | 71 | rxrpc_see_skb(skb, rxrpc_skb_tx_rotated); |
248f219c DH |
72 | call->rxtx_buffer[ix] = NULL; |
73 | call->rxtx_annotations[ix] = 0; | |
74 | skb->next = list; | |
75 | list = skb; | |
70790dbe DH |
76 | |
77 | if (annotation & RXRPC_TX_ANNO_LAST) | |
78 | set_bit(RXRPC_CALL_TX_LAST, &call->flags); | |
248f219c | 79 | } |
17926a79 | 80 | |
248f219c | 81 | spin_unlock(&call->lock); |
17926a79 | 82 | |
70790dbe DH |
83 | trace_rxrpc_transmit(call, (test_bit(RXRPC_CALL_TX_LAST, &call->flags) ? |
84 | rxrpc_transmit_rotate_last : | |
85 | rxrpc_transmit_rotate)); | |
bc4abfcf DH |
86 | wake_up(&call->waitq); |
87 | ||
248f219c DH |
88 | while (list) { |
89 | skb = list; | |
90 | list = skb->next; | |
91 | skb->next = NULL; | |
71f3ca40 | 92 | rxrpc_free_skb(skb, rxrpc_skb_tx_freed); |
17926a79 | 93 | } |
248f219c | 94 | } |
17926a79 | 95 | |
248f219c DH |
96 | /* |
97 | * End the transmission phase of a call. | |
98 | * | |
99 | * This occurs when we get an ACKALL packet, the first DATA packet of a reply, | |
100 | * or a final ACK packet. | |
101 | */ | |
70790dbe DH |
102 | static bool rxrpc_end_tx_phase(struct rxrpc_call *call, bool reply_begun, |
103 | const char *abort_why) | |
248f219c | 104 | { |
17926a79 | 105 | |
70790dbe | 106 | ASSERT(test_bit(RXRPC_CALL_TX_LAST, &call->flags)); |
17926a79 | 107 | |
248f219c | 108 | write_lock(&call->state_lock); |
651350d1 | 109 | |
248f219c | 110 | switch (call->state) { |
70790dbe | 111 | case RXRPC_CALL_CLIENT_SEND_REQUEST: |
248f219c | 112 | case RXRPC_CALL_CLIENT_AWAIT_REPLY: |
70790dbe DH |
113 | if (reply_begun) |
114 | call->state = RXRPC_CALL_CLIENT_RECV_REPLY; | |
115 | else | |
116 | call->state = RXRPC_CALL_CLIENT_AWAIT_REPLY; | |
248f219c | 117 | break; |
70790dbe | 118 | |
248f219c DH |
119 | case RXRPC_CALL_SERVER_AWAIT_ACK: |
120 | __rxrpc_call_completed(call); | |
121 | rxrpc_notify_socket(call); | |
122 | break; | |
70790dbe DH |
123 | |
124 | default: | |
125 | goto bad_state; | |
17926a79 | 126 | } |
17926a79 | 127 | |
248f219c | 128 | write_unlock(&call->state_lock); |
70790dbe DH |
129 | if (call->state == RXRPC_CALL_CLIENT_AWAIT_REPLY) { |
130 | trace_rxrpc_transmit(call, rxrpc_transmit_await_reply); | |
131 | } else { | |
132 | trace_rxrpc_transmit(call, rxrpc_transmit_end); | |
133 | } | |
248f219c DH |
134 | _leave(" = ok"); |
135 | return true; | |
70790dbe DH |
136 | |
137 | bad_state: | |
138 | write_unlock(&call->state_lock); | |
139 | kdebug("end_tx %s", rxrpc_call_states[call->state]); | |
140 | rxrpc_proto_abort(abort_why, call, call->tx_top); | |
141 | return false; | |
142 | } | |
143 | ||
144 | /* | |
145 | * Begin the reply reception phase of a call. | |
146 | */ | |
147 | static bool rxrpc_receiving_reply(struct rxrpc_call *call) | |
148 | { | |
149 | rxrpc_seq_t top = READ_ONCE(call->tx_top); | |
150 | ||
151 | if (!test_bit(RXRPC_CALL_TX_LAST, &call->flags)) | |
152 | rxrpc_rotate_tx_window(call, top); | |
153 | if (!test_bit(RXRPC_CALL_TX_LAST, &call->flags)) { | |
154 | rxrpc_proto_abort("TXL", call, top); | |
155 | return false; | |
156 | } | |
157 | if (!rxrpc_end_tx_phase(call, true, "ETD")) | |
158 | return false; | |
159 | call->tx_phase = false; | |
160 | return true; | |
248f219c DH |
161 | } |
162 | ||
163 | /* | |
164 | * Scan a jumbo packet to validate its structure and to work out how many | |
165 | * subpackets it contains. | |
166 | * | |
167 | * A jumbo packet is a collection of consecutive packets glued together with | |
168 | * little headers between that indicate how to change the initial header for | |
169 | * each subpacket. | |
170 | * | |
171 | * RXRPC_JUMBO_PACKET must be set on all but the last subpacket - and all but | |
172 | * the last are RXRPC_JUMBO_DATALEN in size. The last subpacket may be of any | |
173 | * size. | |
174 | */ | |
175 | static bool rxrpc_validate_jumbo(struct sk_buff *skb) | |
176 | { | |
177 | struct rxrpc_skb_priv *sp = rxrpc_skb(skb); | |
178 | unsigned int offset = sp->offset; | |
89a80ed4 | 179 | unsigned int len = skb->len; |
248f219c DH |
180 | int nr_jumbo = 1; |
181 | u8 flags = sp->hdr.flags; | |
182 | ||
183 | do { | |
184 | nr_jumbo++; | |
185 | if (len - offset < RXRPC_JUMBO_SUBPKTLEN) | |
186 | goto protocol_error; | |
187 | if (flags & RXRPC_LAST_PACKET) | |
188 | goto protocol_error; | |
189 | offset += RXRPC_JUMBO_DATALEN; | |
190 | if (skb_copy_bits(skb, offset, &flags, 1) < 0) | |
191 | goto protocol_error; | |
192 | offset += sizeof(struct rxrpc_jumbo_header); | |
193 | } while (flags & RXRPC_JUMBO_PACKET); | |
194 | ||
195 | sp->nr_jumbo = nr_jumbo; | |
196 | return true; | |
17926a79 | 197 | |
248f219c DH |
198 | protocol_error: |
199 | return false; | |
17926a79 DH |
200 | } |
201 | ||
202 | /* | |
248f219c DH |
203 | * Handle reception of a duplicate packet. |
204 | * | |
205 | * We have to take care to avoid an attack here whereby we're given a series of | |
206 | * jumbograms, each with a sequence number one before the preceding one and | |
207 | * filled up to maximum UDP size. If they never send us the first packet in | |
208 | * the sequence, they can cause us to have to hold on to around 2MiB of kernel | |
209 | * space until the call times out. | |
210 | * | |
211 | * We limit the space usage by only accepting three duplicate jumbo packets per | |
212 | * call. After that, we tell the other side we're no longer accepting jumbos | |
213 | * (that information is encoded in the ACK packet). | |
17926a79 | 214 | */ |
248f219c | 215 | static void rxrpc_input_dup_data(struct rxrpc_call *call, rxrpc_seq_t seq, |
75e42126 | 216 | u8 annotation, bool *_jumbo_bad) |
17926a79 | 217 | { |
248f219c DH |
218 | /* Discard normal packets that are duplicates. */ |
219 | if (annotation == 0) | |
220 | return; | |
17926a79 | 221 | |
248f219c DH |
222 | /* Skip jumbo subpackets that are duplicates. When we've had three or |
223 | * more partially duplicate jumbo packets, we refuse to take any more | |
224 | * jumbos for this call. | |
225 | */ | |
75e42126 DH |
226 | if (!*_jumbo_bad) { |
227 | call->nr_jumbo_bad++; | |
228 | *_jumbo_bad = true; | |
248f219c DH |
229 | } |
230 | } | |
17926a79 | 231 | |
248f219c DH |
232 | /* |
233 | * Process a DATA packet, adding the packet to the Rx ring. | |
234 | */ | |
235 | static void rxrpc_input_data(struct rxrpc_call *call, struct sk_buff *skb, | |
236 | u16 skew) | |
237 | { | |
238 | struct rxrpc_skb_priv *sp = rxrpc_skb(skb); | |
239 | unsigned int offset = sp->offset; | |
240 | unsigned int ix; | |
241 | rxrpc_serial_t serial = sp->hdr.serial, ack_serial = 0; | |
242 | rxrpc_seq_t seq = sp->hdr.seq, hard_ack; | |
75e42126 | 243 | bool immediate_ack = false, jumbo_bad = false, queued; |
248f219c DH |
244 | u16 len; |
245 | u8 ack = 0, flags, annotation = 0; | |
17926a79 | 246 | |
248f219c | 247 | _enter("{%u,%u},{%u,%u}", |
89a80ed4 | 248 | call->rx_hard_ack, call->rx_top, skb->len, seq); |
17926a79 | 249 | |
248f219c DH |
250 | _proto("Rx DATA %%%u { #%u f=%02x }", |
251 | sp->hdr.serial, seq, sp->hdr.flags); | |
17926a79 | 252 | |
248f219c DH |
253 | if (call->state >= RXRPC_CALL_COMPLETE) |
254 | return; | |
17926a79 | 255 | |
248f219c DH |
256 | /* Received data implicitly ACKs all of the request packets we sent |
257 | * when we're acting as a client. | |
258 | */ | |
70790dbe DH |
259 | if ((call->state == RXRPC_CALL_CLIENT_SEND_REQUEST || |
260 | call->state == RXRPC_CALL_CLIENT_AWAIT_REPLY) && | |
261 | !rxrpc_receiving_reply(call)) | |
248f219c | 262 | return; |
17926a79 | 263 | |
248f219c | 264 | call->ackr_prev_seq = seq; |
17926a79 | 265 | |
248f219c DH |
266 | hard_ack = READ_ONCE(call->rx_hard_ack); |
267 | if (after(seq, hard_ack + call->rx_winsize)) { | |
17926a79 | 268 | ack = RXRPC_ACK_EXCEEDS_WINDOW; |
248f219c DH |
269 | ack_serial = serial; |
270 | goto ack; | |
17926a79 DH |
271 | } |
272 | ||
248f219c DH |
273 | flags = sp->hdr.flags; |
274 | if (flags & RXRPC_JUMBO_PACKET) { | |
75e42126 | 275 | if (call->nr_jumbo_bad > 3) { |
248f219c DH |
276 | ack = RXRPC_ACK_NOSPACE; |
277 | ack_serial = serial; | |
278 | goto ack; | |
17926a79 | 279 | } |
248f219c | 280 | annotation = 1; |
17926a79 DH |
281 | } |
282 | ||
248f219c DH |
283 | next_subpacket: |
284 | queued = false; | |
285 | ix = seq & RXRPC_RXTX_BUFF_MASK; | |
89a80ed4 | 286 | len = skb->len; |
248f219c DH |
287 | if (flags & RXRPC_JUMBO_PACKET) |
288 | len = RXRPC_JUMBO_DATALEN; | |
289 | ||
290 | if (flags & RXRPC_LAST_PACKET) { | |
816c9fce | 291 | if (test_bit(RXRPC_CALL_RX_LAST, &call->flags) && |
248f219c DH |
292 | seq != call->rx_top) |
293 | return rxrpc_proto_abort("LSN", call, seq); | |
294 | } else { | |
295 | if (test_bit(RXRPC_CALL_RX_LAST, &call->flags) && | |
296 | after_eq(seq, call->rx_top)) | |
297 | return rxrpc_proto_abort("LSA", call, seq); | |
17926a79 DH |
298 | } |
299 | ||
248f219c DH |
300 | if (before_eq(seq, hard_ack)) { |
301 | ack = RXRPC_ACK_DUPLICATE; | |
302 | ack_serial = serial; | |
303 | goto skip; | |
304 | } | |
305 | ||
306 | if (flags & RXRPC_REQUEST_ACK && !ack) { | |
307 | ack = RXRPC_ACK_REQUESTED; | |
308 | ack_serial = serial; | |
309 | } | |
310 | ||
311 | if (call->rxtx_buffer[ix]) { | |
75e42126 | 312 | rxrpc_input_dup_data(call, seq, annotation, &jumbo_bad); |
248f219c DH |
313 | if (ack != RXRPC_ACK_DUPLICATE) { |
314 | ack = RXRPC_ACK_DUPLICATE; | |
315 | ack_serial = serial; | |
17926a79 | 316 | } |
248f219c DH |
317 | immediate_ack = true; |
318 | goto skip; | |
17926a79 DH |
319 | } |
320 | ||
248f219c DH |
321 | /* Queue the packet. We use a couple of memory barriers here as need |
322 | * to make sure that rx_top is perceived to be set after the buffer | |
323 | * pointer and that the buffer pointer is set after the annotation and | |
324 | * the skb data. | |
325 | * | |
326 | * Barriers against rxrpc_recvmsg_data() and rxrpc_rotate_rx_window() | |
327 | * and also rxrpc_fill_out_ack(). | |
328 | */ | |
71f3ca40 | 329 | rxrpc_get_skb(skb, rxrpc_skb_rx_got); |
248f219c DH |
330 | call->rxtx_annotations[ix] = annotation; |
331 | smp_wmb(); | |
332 | call->rxtx_buffer[ix] = skb; | |
333 | if (after(seq, call->rx_top)) | |
334 | smp_store_release(&call->rx_top, seq); | |
58dc63c9 | 335 | if (flags & RXRPC_LAST_PACKET) { |
816c9fce | 336 | set_bit(RXRPC_CALL_RX_LAST, &call->flags); |
58dc63c9 DH |
337 | trace_rxrpc_receive(call, rxrpc_receive_queue_last, serial, seq); |
338 | } else { | |
339 | trace_rxrpc_receive(call, rxrpc_receive_queue, serial, seq); | |
340 | } | |
248f219c DH |
341 | queued = true; |
342 | ||
343 | if (after_eq(seq, call->rx_expect_next)) { | |
344 | if (after(seq, call->rx_expect_next)) { | |
345 | _net("OOS %u > %u", seq, call->rx_expect_next); | |
346 | ack = RXRPC_ACK_OUT_OF_SEQUENCE; | |
347 | ack_serial = serial; | |
348 | } | |
349 | call->rx_expect_next = seq + 1; | |
17926a79 DH |
350 | } |
351 | ||
248f219c DH |
352 | skip: |
353 | offset += len; | |
354 | if (flags & RXRPC_JUMBO_PACKET) { | |
355 | if (skb_copy_bits(skb, offset, &flags, 1) < 0) | |
356 | return rxrpc_proto_abort("XJF", call, seq); | |
357 | offset += sizeof(struct rxrpc_jumbo_header); | |
358 | seq++; | |
359 | serial++; | |
360 | annotation++; | |
361 | if (flags & RXRPC_JUMBO_PACKET) | |
362 | annotation |= RXRPC_RX_ANNO_JLAST; | |
75e42126 DH |
363 | if (after(seq, hard_ack + call->rx_winsize)) { |
364 | ack = RXRPC_ACK_EXCEEDS_WINDOW; | |
365 | ack_serial = serial; | |
366 | if (!jumbo_bad) { | |
367 | call->nr_jumbo_bad++; | |
368 | jumbo_bad = true; | |
369 | } | |
370 | goto ack; | |
371 | } | |
248f219c DH |
372 | |
373 | _proto("Rx DATA Jumbo %%%u", serial); | |
374 | goto next_subpacket; | |
375 | } | |
17926a79 | 376 | |
248f219c DH |
377 | if (queued && flags & RXRPC_LAST_PACKET && !ack) { |
378 | ack = RXRPC_ACK_DELAY; | |
379 | ack_serial = serial; | |
380 | } | |
17926a79 | 381 | |
248f219c DH |
382 | ack: |
383 | if (ack) | |
384 | rxrpc_propose_ACK(call, ack, skew, ack_serial, | |
385 | immediate_ack, true); | |
17926a79 | 386 | |
248f219c DH |
387 | if (sp->hdr.seq == READ_ONCE(call->rx_hard_ack) + 1) |
388 | rxrpc_notify_socket(call); | |
389 | _leave(" [queued]"); | |
17926a79 DH |
390 | } |
391 | ||
50235c4b DH |
392 | /* |
393 | * Process a requested ACK. | |
394 | */ | |
395 | static void rxrpc_input_requested_ack(struct rxrpc_call *call, | |
396 | ktime_t resp_time, | |
397 | rxrpc_serial_t orig_serial, | |
398 | rxrpc_serial_t ack_serial) | |
399 | { | |
400 | struct rxrpc_skb_priv *sp; | |
401 | struct sk_buff *skb; | |
402 | ktime_t sent_at; | |
403 | int ix; | |
404 | ||
405 | for (ix = 0; ix < RXRPC_RXTX_BUFF_SIZE; ix++) { | |
406 | skb = call->rxtx_buffer[ix]; | |
407 | if (!skb) | |
408 | continue; | |
409 | ||
410 | sp = rxrpc_skb(skb); | |
411 | if (sp->hdr.serial != orig_serial) | |
412 | continue; | |
413 | smp_rmb(); | |
414 | sent_at = skb->tstamp; | |
415 | goto found; | |
416 | } | |
417 | return; | |
418 | ||
419 | found: | |
420 | rxrpc_peer_add_rtt(call, rxrpc_rtt_rx_requested_ack, | |
421 | orig_serial, ack_serial, sent_at, resp_time); | |
422 | } | |
423 | ||
8e83134d DH |
424 | /* |
425 | * Process a ping response. | |
426 | */ | |
427 | static void rxrpc_input_ping_response(struct rxrpc_call *call, | |
428 | ktime_t resp_time, | |
429 | rxrpc_serial_t orig_serial, | |
430 | rxrpc_serial_t ack_serial) | |
431 | { | |
432 | rxrpc_serial_t ping_serial; | |
433 | ktime_t ping_time; | |
434 | ||
435 | ping_time = call->ackr_ping_time; | |
436 | smp_rmb(); | |
437 | ping_serial = call->ackr_ping; | |
438 | ||
439 | if (!test_bit(RXRPC_CALL_PINGING, &call->flags) || | |
440 | before(orig_serial, ping_serial)) | |
441 | return; | |
442 | clear_bit(RXRPC_CALL_PINGING, &call->flags); | |
443 | if (after(orig_serial, ping_serial)) | |
444 | return; | |
445 | ||
446 | rxrpc_peer_add_rtt(call, rxrpc_rtt_rx_ping_response, | |
447 | orig_serial, ack_serial, ping_time, resp_time); | |
448 | } | |
449 | ||
17926a79 | 450 | /* |
248f219c | 451 | * Process the extra information that may be appended to an ACK packet |
17926a79 | 452 | */ |
248f219c DH |
453 | static void rxrpc_input_ackinfo(struct rxrpc_call *call, struct sk_buff *skb, |
454 | struct rxrpc_ackinfo *ackinfo) | |
17926a79 | 455 | { |
248f219c DH |
456 | struct rxrpc_skb_priv *sp = rxrpc_skb(skb); |
457 | struct rxrpc_peer *peer; | |
458 | unsigned int mtu; | |
01fd0742 | 459 | u32 rwind = ntohl(ackinfo->rwind); |
248f219c DH |
460 | |
461 | _proto("Rx ACK %%%u Info { rx=%u max=%u rwin=%u jm=%u }", | |
462 | sp->hdr.serial, | |
463 | ntohl(ackinfo->rxMTU), ntohl(ackinfo->maxMTU), | |
01fd0742 | 464 | rwind, ntohl(ackinfo->jumbo_max)); |
248f219c | 465 | |
01fd0742 DH |
466 | if (rwind > RXRPC_RXTX_BUFF_SIZE - 1) |
467 | rwind = RXRPC_RXTX_BUFF_SIZE - 1; | |
468 | call->tx_winsize = rwind; | |
248f219c DH |
469 | |
470 | mtu = min(ntohl(ackinfo->rxMTU), ntohl(ackinfo->maxMTU)); | |
471 | ||
472 | peer = call->peer; | |
473 | if (mtu < peer->maxdata) { | |
474 | spin_lock_bh(&peer->lock); | |
475 | peer->maxdata = mtu; | |
476 | peer->mtu = mtu + peer->hdrsize; | |
477 | spin_unlock_bh(&peer->lock); | |
478 | _net("Net MTU %u (maxdata %u)", peer->mtu, peer->maxdata); | |
479 | } | |
480 | } | |
17926a79 | 481 | |
248f219c DH |
482 | /* |
483 | * Process individual soft ACKs. | |
484 | * | |
485 | * Each ACK in the array corresponds to one packet and can be either an ACK or | |
486 | * a NAK. If we get find an explicitly NAK'd packet we resend immediately; | |
487 | * packets that lie beyond the end of the ACK list are scheduled for resend by | |
488 | * the timer on the basis that the peer might just not have processed them at | |
489 | * the time the ACK was sent. | |
490 | */ | |
491 | static void rxrpc_input_soft_acks(struct rxrpc_call *call, u8 *acks, | |
492 | rxrpc_seq_t seq, int nr_acks) | |
493 | { | |
494 | bool resend = false; | |
495 | int ix; | |
f07373ea | 496 | u8 annotation, anno_type; |
248f219c DH |
497 | |
498 | for (; nr_acks > 0; nr_acks--, seq++) { | |
499 | ix = seq & RXRPC_RXTX_BUFF_MASK; | |
f07373ea DH |
500 | annotation = call->rxtx_annotations[ix]; |
501 | anno_type = annotation & RXRPC_TX_ANNO_MASK; | |
502 | annotation &= ~RXRPC_TX_ANNO_MASK; | |
d01dc4c3 | 503 | switch (*acks++) { |
248f219c | 504 | case RXRPC_ACK_TYPE_ACK: |
f07373ea DH |
505 | if (anno_type == RXRPC_TX_ANNO_ACK) |
506 | continue; | |
507 | call->rxtx_annotations[ix] = | |
508 | RXRPC_TX_ANNO_ACK | annotation; | |
248f219c DH |
509 | break; |
510 | case RXRPC_ACK_TYPE_NACK: | |
f07373ea | 511 | if (anno_type == RXRPC_TX_ANNO_NAK) |
248f219c | 512 | continue; |
be8aa338 DH |
513 | if (anno_type == RXRPC_TX_ANNO_RETRANS) |
514 | continue; | |
f07373ea DH |
515 | call->rxtx_annotations[ix] = |
516 | RXRPC_TX_ANNO_NAK | annotation; | |
248f219c DH |
517 | resend = true; |
518 | break; | |
519 | default: | |
520 | return rxrpc_proto_abort("SFT", call, 0); | |
17926a79 | 521 | } |
17926a79 | 522 | } |
248f219c DH |
523 | |
524 | if (resend && | |
525 | !test_and_set_bit(RXRPC_CALL_EV_RESEND, &call->events)) | |
526 | rxrpc_queue_call(call); | |
17926a79 DH |
527 | } |
528 | ||
529 | /* | |
248f219c DH |
530 | * Process an ACK packet. |
531 | * | |
532 | * ack.firstPacket is the sequence number of the first soft-ACK'd/NAK'd packet | |
533 | * in the ACK array. Anything before that is hard-ACK'd and may be discarded. | |
534 | * | |
535 | * A hard-ACK means that a packet has been processed and may be discarded; a | |
536 | * soft-ACK means that the packet may be discarded and retransmission | |
537 | * requested. A phase is complete when all packets are hard-ACK'd. | |
17926a79 | 538 | */ |
248f219c DH |
539 | static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb, |
540 | u16 skew) | |
17926a79 DH |
541 | { |
542 | struct rxrpc_skb_priv *sp = rxrpc_skb(skb); | |
248f219c DH |
543 | union { |
544 | struct rxrpc_ackpacket ack; | |
545 | struct rxrpc_ackinfo info; | |
546 | u8 acks[RXRPC_MAXACKS]; | |
547 | } buf; | |
8e83134d | 548 | rxrpc_serial_t acked_serial; |
248f219c DH |
549 | rxrpc_seq_t first_soft_ack, hard_ack; |
550 | int nr_acks, offset; | |
551 | ||
552 | _enter(""); | |
553 | ||
554 | if (skb_copy_bits(skb, sp->offset, &buf.ack, sizeof(buf.ack)) < 0) { | |
555 | _debug("extraction failure"); | |
556 | return rxrpc_proto_abort("XAK", call, 0); | |
17926a79 | 557 | } |
248f219c DH |
558 | sp->offset += sizeof(buf.ack); |
559 | ||
8e83134d | 560 | acked_serial = ntohl(buf.ack.serial); |
248f219c DH |
561 | first_soft_ack = ntohl(buf.ack.firstPacket); |
562 | hard_ack = first_soft_ack - 1; | |
563 | nr_acks = buf.ack.nAcks; | |
564 | ||
ec71eb9a DH |
565 | trace_rxrpc_rx_ack(call, first_soft_ack, buf.ack.reason, nr_acks); |
566 | ||
248f219c DH |
567 | _proto("Rx ACK %%%u { m=%hu f=#%u p=#%u s=%%%u r=%s n=%u }", |
568 | sp->hdr.serial, | |
569 | ntohs(buf.ack.maxSkew), | |
570 | first_soft_ack, | |
571 | ntohl(buf.ack.previousPacket), | |
8e83134d | 572 | acked_serial, |
248f219c DH |
573 | rxrpc_acks(buf.ack.reason), |
574 | buf.ack.nAcks); | |
575 | ||
8e83134d DH |
576 | if (buf.ack.reason == RXRPC_ACK_PING_RESPONSE) |
577 | rxrpc_input_ping_response(call, skb->tstamp, acked_serial, | |
578 | sp->hdr.serial); | |
50235c4b DH |
579 | if (buf.ack.reason == RXRPC_ACK_REQUESTED) |
580 | rxrpc_input_requested_ack(call, skb->tstamp, acked_serial, | |
581 | sp->hdr.serial); | |
8e83134d | 582 | |
248f219c DH |
583 | if (buf.ack.reason == RXRPC_ACK_PING) { |
584 | _proto("Rx ACK %%%u PING Request", sp->hdr.serial); | |
585 | rxrpc_propose_ACK(call, RXRPC_ACK_PING_RESPONSE, | |
586 | skew, sp->hdr.serial, true, true); | |
587 | } else if (sp->hdr.flags & RXRPC_REQUEST_ACK) { | |
563ea7d5 | 588 | rxrpc_propose_ACK(call, RXRPC_ACK_REQUESTED, |
248f219c | 589 | skew, sp->hdr.serial, true, true); |
17926a79 DH |
590 | } |
591 | ||
248f219c | 592 | offset = sp->offset + nr_acks + 3; |
89a80ed4 | 593 | if (skb->len >= offset + sizeof(buf.info)) { |
248f219c DH |
594 | if (skb_copy_bits(skb, offset, &buf.info, sizeof(buf.info)) < 0) |
595 | return rxrpc_proto_abort("XAI", call, 0); | |
596 | rxrpc_input_ackinfo(call, skb, &buf.info); | |
597 | } | |
17926a79 | 598 | |
248f219c DH |
599 | if (first_soft_ack == 0) |
600 | return rxrpc_proto_abort("AK0", call, 0); | |
17926a79 | 601 | |
248f219c DH |
602 | /* Ignore ACKs unless we are or have just been transmitting. */ |
603 | switch (call->state) { | |
604 | case RXRPC_CALL_CLIENT_SEND_REQUEST: | |
605 | case RXRPC_CALL_CLIENT_AWAIT_REPLY: | |
606 | case RXRPC_CALL_SERVER_SEND_REPLY: | |
607 | case RXRPC_CALL_SERVER_AWAIT_ACK: | |
608 | break; | |
17926a79 | 609 | default: |
248f219c DH |
610 | return; |
611 | } | |
17926a79 | 612 | |
248f219c | 613 | /* Discard any out-of-order or duplicate ACKs. */ |
98dafac5 | 614 | if (before_eq(sp->hdr.serial, call->acks_latest)) { |
248f219c DH |
615 | _debug("discard ACK %d <= %d", |
616 | sp->hdr.serial, call->acks_latest); | |
617 | return; | |
618 | } | |
619 | call->acks_latest = sp->hdr.serial; | |
17926a79 | 620 | |
248f219c DH |
621 | if (before(hard_ack, call->tx_hard_ack) || |
622 | after(hard_ack, call->tx_top)) | |
623 | return rxrpc_proto_abort("AKW", call, 0); | |
70790dbe DH |
624 | if (nr_acks > call->tx_top - hard_ack) |
625 | return rxrpc_proto_abort("AKN", call, 0); | |
17926a79 | 626 | |
248f219c DH |
627 | if (after(hard_ack, call->tx_hard_ack)) |
628 | rxrpc_rotate_tx_window(call, hard_ack); | |
17926a79 | 629 | |
70790dbe DH |
630 | if (nr_acks > 0) { |
631 | if (skb_copy_bits(skb, sp->offset, buf.acks, nr_acks) < 0) | |
632 | return rxrpc_proto_abort("XSA", call, 0); | |
633 | rxrpc_input_soft_acks(call, buf.acks, first_soft_ack, nr_acks); | |
634 | } | |
635 | ||
636 | if (test_bit(RXRPC_CALL_TX_LAST, &call->flags)) { | |
637 | rxrpc_end_tx_phase(call, false, "ETA"); | |
248f219c | 638 | return; |
70790dbe | 639 | } |
17926a79 | 640 | |
17926a79 DH |
641 | } |
642 | ||
643 | /* | |
248f219c | 644 | * Process an ACKALL packet. |
17926a79 | 645 | */ |
248f219c | 646 | static void rxrpc_input_ackall(struct rxrpc_call *call, struct sk_buff *skb) |
17926a79 | 647 | { |
248f219c | 648 | struct rxrpc_skb_priv *sp = rxrpc_skb(skb); |
17926a79 | 649 | |
248f219c | 650 | _proto("Rx ACKALL %%%u", sp->hdr.serial); |
17926a79 | 651 | |
70790dbe DH |
652 | rxrpc_rotate_tx_window(call, call->tx_top); |
653 | if (test_bit(RXRPC_CALL_TX_LAST, &call->flags)) | |
654 | rxrpc_end_tx_phase(call, false, "ETL"); | |
248f219c | 655 | } |
17926a79 | 656 | |
248f219c DH |
657 | /* |
658 | * Process an ABORT packet. | |
659 | */ | |
660 | static void rxrpc_input_abort(struct rxrpc_call *call, struct sk_buff *skb) | |
661 | { | |
662 | struct rxrpc_skb_priv *sp = rxrpc_skb(skb); | |
663 | __be32 wtmp; | |
664 | u32 abort_code = RX_CALL_DEAD; | |
17926a79 | 665 | |
248f219c | 666 | _enter(""); |
17926a79 | 667 | |
248f219c DH |
668 | if (skb->len >= 4 && |
669 | skb_copy_bits(skb, sp->offset, &wtmp, sizeof(wtmp)) >= 0) | |
670 | abort_code = ntohl(wtmp); | |
17926a79 | 671 | |
248f219c | 672 | _proto("Rx ABORT %%%u { %x }", sp->hdr.serial, abort_code); |
17926a79 | 673 | |
248f219c DH |
674 | if (rxrpc_set_call_completion(call, RXRPC_CALL_REMOTELY_ABORTED, |
675 | abort_code, ECONNABORTED)) | |
676 | rxrpc_notify_socket(call); | |
17926a79 DH |
677 | } |
678 | ||
679 | /* | |
248f219c | 680 | * Process an incoming call packet. |
17926a79 | 681 | */ |
248f219c DH |
682 | static void rxrpc_input_call_packet(struct rxrpc_call *call, |
683 | struct sk_buff *skb, u16 skew) | |
17926a79 | 684 | { |
248f219c | 685 | struct rxrpc_skb_priv *sp = rxrpc_skb(skb); |
17926a79 | 686 | |
7727640c | 687 | _enter("%p,%p", call, skb); |
17926a79 | 688 | |
248f219c DH |
689 | switch (sp->hdr.type) { |
690 | case RXRPC_PACKET_TYPE_DATA: | |
691 | rxrpc_input_data(call, skb, skew); | |
692 | break; | |
f5c17aae | 693 | |
248f219c DH |
694 | case RXRPC_PACKET_TYPE_ACK: |
695 | rxrpc_input_ack(call, skb, skew); | |
17926a79 | 696 | break; |
17926a79 | 697 | |
248f219c DH |
698 | case RXRPC_PACKET_TYPE_BUSY: |
699 | _proto("Rx BUSY %%%u", sp->hdr.serial); | |
17926a79 | 700 | |
248f219c DH |
701 | /* Just ignore BUSY packets from the server; the retry and |
702 | * lifespan timers will take care of business. BUSY packets | |
703 | * from the client don't make sense. | |
704 | */ | |
705 | break; | |
17926a79 | 706 | |
248f219c DH |
707 | case RXRPC_PACKET_TYPE_ABORT: |
708 | rxrpc_input_abort(call, skb); | |
709 | break; | |
17926a79 | 710 | |
248f219c DH |
711 | case RXRPC_PACKET_TYPE_ACKALL: |
712 | rxrpc_input_ackall(call, skb); | |
713 | break; | |
f5c17aae | 714 | |
248f219c DH |
715 | default: |
716 | _proto("Rx %s %%%u", rxrpc_pkts[sp->hdr.type], sp->hdr.serial); | |
717 | break; | |
17926a79 | 718 | } |
248f219c | 719 | |
17926a79 DH |
720 | _leave(""); |
721 | } | |
722 | ||
723 | /* | |
724 | * post connection-level events to the connection | |
18bfeba5 DH |
725 | * - this includes challenges, responses, some aborts and call terminal packet |
726 | * retransmission. | |
17926a79 | 727 | */ |
2e7e9758 | 728 | static void rxrpc_post_packet_to_conn(struct rxrpc_connection *conn, |
17926a79 DH |
729 | struct sk_buff *skb) |
730 | { | |
731 | _enter("%p,%p", conn, skb); | |
732 | ||
17926a79 | 733 | skb_queue_tail(&conn->rx_queue, skb); |
2e7e9758 | 734 | rxrpc_queue_conn(conn); |
17926a79 DH |
735 | } |
736 | ||
44ba0698 DH |
737 | /* |
738 | * post endpoint-level events to the local endpoint | |
739 | * - this includes debug and version messages | |
740 | */ | |
741 | static void rxrpc_post_packet_to_local(struct rxrpc_local *local, | |
742 | struct sk_buff *skb) | |
743 | { | |
744 | _enter("%p,%p", local, skb); | |
745 | ||
44ba0698 | 746 | skb_queue_tail(&local->event_queue, skb); |
5acbee46 | 747 | rxrpc_queue_local(local); |
44ba0698 DH |
748 | } |
749 | ||
248f219c DH |
750 | /* |
751 | * put a packet up for transport-level abort | |
752 | */ | |
753 | static void rxrpc_reject_packet(struct rxrpc_local *local, struct sk_buff *skb) | |
754 | { | |
755 | CHECK_SLAB_OKAY(&local->usage); | |
756 | ||
757 | skb_queue_tail(&local->reject_queue, skb); | |
758 | rxrpc_queue_local(local); | |
759 | } | |
760 | ||
0d12f8a4 DH |
761 | /* |
762 | * Extract the wire header from a packet and translate the byte order. | |
763 | */ | |
764 | static noinline | |
765 | int rxrpc_extract_header(struct rxrpc_skb_priv *sp, struct sk_buff *skb) | |
766 | { | |
767 | struct rxrpc_wire_header whdr; | |
768 | ||
769 | /* dig out the RxRPC connection details */ | |
4d0fc73e | 770 | if (skb_copy_bits(skb, 0, &whdr, sizeof(whdr)) < 0) |
0d12f8a4 | 771 | return -EBADMSG; |
0d12f8a4 DH |
772 | |
773 | memset(sp, 0, sizeof(*sp)); | |
774 | sp->hdr.epoch = ntohl(whdr.epoch); | |
775 | sp->hdr.cid = ntohl(whdr.cid); | |
776 | sp->hdr.callNumber = ntohl(whdr.callNumber); | |
777 | sp->hdr.seq = ntohl(whdr.seq); | |
778 | sp->hdr.serial = ntohl(whdr.serial); | |
779 | sp->hdr.flags = whdr.flags; | |
780 | sp->hdr.type = whdr.type; | |
781 | sp->hdr.userStatus = whdr.userStatus; | |
782 | sp->hdr.securityIndex = whdr.securityIndex; | |
783 | sp->hdr._rsvd = ntohs(whdr._rsvd); | |
784 | sp->hdr.serviceId = ntohs(whdr.serviceId); | |
248f219c | 785 | sp->offset = sizeof(whdr); |
0d12f8a4 DH |
786 | return 0; |
787 | } | |
788 | ||
17926a79 DH |
789 | /* |
790 | * handle data received on the local endpoint | |
791 | * - may be called in interrupt context | |
4f95dd78 DH |
792 | * |
793 | * The socket is locked by the caller and this prevents the socket from being | |
794 | * shut down and the local endpoint from going away, thus sk_user_data will not | |
795 | * be cleared until this function returns. | |
17926a79 | 796 | */ |
248f219c | 797 | void rxrpc_data_ready(struct sock *udp_sk) |
17926a79 | 798 | { |
8496af50 | 799 | struct rxrpc_connection *conn; |
248f219c DH |
800 | struct rxrpc_channel *chan; |
801 | struct rxrpc_call *call; | |
17926a79 | 802 | struct rxrpc_skb_priv *sp; |
248f219c | 803 | struct rxrpc_local *local = udp_sk->sk_user_data; |
17926a79 | 804 | struct sk_buff *skb; |
248f219c | 805 | unsigned int channel; |
563ea7d5 | 806 | int ret, skew; |
17926a79 | 807 | |
248f219c | 808 | _enter("%p", udp_sk); |
17926a79 DH |
809 | |
810 | ASSERT(!irqs_disabled()); | |
811 | ||
248f219c | 812 | skb = skb_recv_datagram(udp_sk, 0, 1, &ret); |
17926a79 | 813 | if (!skb) { |
17926a79 DH |
814 | if (ret == -EAGAIN) |
815 | return; | |
816 | _debug("UDP socket error %d", ret); | |
817 | return; | |
818 | } | |
819 | ||
71f3ca40 | 820 | rxrpc_new_skb(skb, rxrpc_skb_rx_received); |
17926a79 DH |
821 | |
822 | _net("recv skb %p", skb); | |
823 | ||
824 | /* we'll probably need to checksum it (didn't call sock_recvmsg) */ | |
825 | if (skb_checksum_complete(skb)) { | |
71f3ca40 | 826 | rxrpc_free_skb(skb, rxrpc_skb_rx_freed); |
02c22347 | 827 | __UDP_INC_STATS(&init_net, UDP_MIB_INERRORS, 0); |
17926a79 DH |
828 | _leave(" [CSUM failed]"); |
829 | return; | |
830 | } | |
831 | ||
02c22347 | 832 | __UDP_INC_STATS(&init_net, UDP_MIB_INDATAGRAMS, 0); |
1781f7f5 | 833 | |
0d12f8a4 DH |
834 | /* The socket buffer we have is owned by UDP, with UDP's data all over |
835 | * it, but we really want our own data there. | |
836 | */ | |
17926a79 DH |
837 | skb_orphan(skb); |
838 | sp = rxrpc_skb(skb); | |
17926a79 | 839 | |
89b475ab DH |
840 | /* dig out the RxRPC connection details */ |
841 | if (rxrpc_extract_header(sp, skb) < 0) | |
842 | goto bad_message; | |
843 | ||
8a681c36 DH |
844 | if (IS_ENABLED(CONFIG_AF_RXRPC_INJECT_LOSS)) { |
845 | static int lose; | |
846 | if ((lose++ & 7) == 7) { | |
89b475ab | 847 | trace_rxrpc_rx_lose(sp); |
8a681c36 DH |
848 | rxrpc_lose_skb(skb, rxrpc_skb_rx_lost); |
849 | return; | |
850 | } | |
851 | } | |
852 | ||
49e19ec7 | 853 | trace_rxrpc_rx_packet(sp); |
17926a79 DH |
854 | |
855 | _net("Rx RxRPC %s ep=%x call=%x:%x", | |
856 | sp->hdr.flags & RXRPC_CLIENT_INITIATED ? "ToServer" : "ToClient", | |
0d12f8a4 | 857 | sp->hdr.epoch, sp->hdr.cid, sp->hdr.callNumber); |
17926a79 | 858 | |
351c1e64 DH |
859 | if (sp->hdr.type >= RXRPC_N_PACKET_TYPES || |
860 | !((RXRPC_SUPPORTED_PACKET_TYPES >> sp->hdr.type) & 1)) { | |
17926a79 DH |
861 | _proto("Rx Bad Packet Type %u", sp->hdr.type); |
862 | goto bad_message; | |
863 | } | |
864 | ||
248f219c DH |
865 | switch (sp->hdr.type) { |
866 | case RXRPC_PACKET_TYPE_VERSION: | |
44ba0698 DH |
867 | rxrpc_post_packet_to_local(local, skb); |
868 | goto out; | |
bc6e1ea3 | 869 | |
248f219c DH |
870 | case RXRPC_PACKET_TYPE_BUSY: |
871 | if (sp->hdr.flags & RXRPC_CLIENT_INITIATED) | |
872 | goto discard; | |
873 | ||
874 | case RXRPC_PACKET_TYPE_DATA: | |
875 | if (sp->hdr.callNumber == 0) | |
876 | goto bad_message; | |
877 | if (sp->hdr.flags & RXRPC_JUMBO_PACKET && | |
878 | !rxrpc_validate_jumbo(skb)) | |
879 | goto bad_message; | |
880 | break; | |
881 | } | |
17926a79 | 882 | |
8496af50 DH |
883 | rcu_read_lock(); |
884 | ||
8496af50 | 885 | conn = rxrpc_find_connection_rcu(local, skb); |
248f219c DH |
886 | if (conn) { |
887 | if (sp->hdr.securityIndex != conn->security_ix) | |
888 | goto wrong_security; | |
563ea7d5 | 889 | |
248f219c DH |
890 | if (sp->hdr.callNumber == 0) { |
891 | /* Connection-level packet */ | |
892 | _debug("CONN %p {%d}", conn, conn->debug_id); | |
893 | rxrpc_post_packet_to_conn(conn, skb); | |
894 | goto out_unlock; | |
895 | } | |
896 | ||
897 | /* Note the serial number skew here */ | |
898 | skew = (int)sp->hdr.serial - (int)conn->hi_serial; | |
899 | if (skew >= 0) { | |
900 | if (skew > 0) | |
901 | conn->hi_serial = sp->hdr.serial; | |
902 | } else { | |
903 | skew = -skew; | |
904 | skew = min(skew, 65535); | |
905 | } | |
17926a79 | 906 | |
8496af50 | 907 | /* Call-bound packets are routed by connection channel. */ |
248f219c DH |
908 | channel = sp->hdr.cid & RXRPC_CHANNELMASK; |
909 | chan = &conn->channels[channel]; | |
18bfeba5 DH |
910 | |
911 | /* Ignore really old calls */ | |
912 | if (sp->hdr.callNumber < chan->last_call) | |
913 | goto discard_unlock; | |
914 | ||
915 | if (sp->hdr.callNumber == chan->last_call) { | |
248f219c DH |
916 | /* For the previous service call, if completed successfully, we |
917 | * discard all further packets. | |
18bfeba5 | 918 | */ |
2266ffde | 919 | if (rxrpc_conn_is_service(conn) && |
18bfeba5 DH |
920 | (chan->last_type == RXRPC_PACKET_TYPE_ACK || |
921 | sp->hdr.type == RXRPC_PACKET_TYPE_ABORT)) | |
922 | goto discard_unlock; | |
923 | ||
248f219c DH |
924 | /* But otherwise we need to retransmit the final packet from |
925 | * data cached in the connection record. | |
18bfeba5 DH |
926 | */ |
927 | rxrpc_post_packet_to_conn(conn, skb); | |
928 | goto out_unlock; | |
929 | } | |
0d12f8a4 | 930 | |
18bfeba5 | 931 | call = rcu_dereference(chan->call); |
248f219c DH |
932 | } else { |
933 | skew = 0; | |
934 | call = NULL; | |
935 | } | |
8496af50 | 936 | |
248f219c DH |
937 | if (!call || atomic_read(&call->usage) == 0) { |
938 | if (!(sp->hdr.type & RXRPC_CLIENT_INITIATED) || | |
939 | sp->hdr.callNumber == 0 || | |
940 | sp->hdr.type != RXRPC_PACKET_TYPE_DATA) | |
941 | goto bad_message_unlock; | |
942 | if (sp->hdr.seq != 1) | |
943 | goto discard_unlock; | |
944 | call = rxrpc_new_incoming_call(local, conn, skb); | |
945 | if (!call) { | |
946 | rcu_read_unlock(); | |
947 | goto reject_packet; | |
948 | } | |
8e83134d | 949 | rxrpc_send_ping(call, skb, skew); |
7727640c | 950 | } |
44ba0698 | 951 | |
248f219c DH |
952 | rxrpc_input_call_packet(call, skb, skew); |
953 | goto discard_unlock; | |
954 | ||
18bfeba5 | 955 | discard_unlock: |
8496af50 | 956 | rcu_read_unlock(); |
248f219c | 957 | discard: |
71f3ca40 | 958 | rxrpc_free_skb(skb, rxrpc_skb_rx_freed); |
44ba0698 | 959 | out: |
49e19ec7 | 960 | trace_rxrpc_rx_done(0, 0); |
17926a79 DH |
961 | return; |
962 | ||
248f219c | 963 | out_unlock: |
8496af50 | 964 | rcu_read_unlock(); |
248f219c | 965 | goto out; |
8496af50 | 966 | |
248f219c DH |
967 | wrong_security: |
968 | rcu_read_unlock(); | |
969 | trace_rxrpc_abort("SEC", sp->hdr.cid, sp->hdr.callNumber, sp->hdr.seq, | |
970 | RXKADINCONSISTENCY, EBADMSG); | |
971 | skb->priority = RXKADINCONSISTENCY; | |
972 | goto post_abort; | |
17926a79 | 973 | |
248f219c DH |
974 | bad_message_unlock: |
975 | rcu_read_unlock(); | |
17926a79 | 976 | bad_message: |
248f219c DH |
977 | trace_rxrpc_abort("BAD", sp->hdr.cid, sp->hdr.callNumber, sp->hdr.seq, |
978 | RX_PROTOCOL_ERROR, EBADMSG); | |
17926a79 | 979 | skb->priority = RX_PROTOCOL_ERROR; |
248f219c DH |
980 | post_abort: |
981 | skb->mark = RXRPC_SKB_MARK_LOCAL_ABORT; | |
49e19ec7 DH |
982 | reject_packet: |
983 | trace_rxrpc_rx_done(skb->mark, skb->priority); | |
17926a79 | 984 | rxrpc_reject_packet(local, skb); |
17926a79 DH |
985 | _leave(" [badmsg]"); |
986 | } |