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e8f69799 IL |
1 | /* Copyright (c) 2018, Mellanox Technologies All rights reserved. |
2 | * | |
3 | * This software is available to you under a choice of one of two | |
4 | * licenses. You may choose to be licensed under the terms of the GNU | |
5 | * General Public License (GPL) Version 2, available from the file | |
6 | * COPYING in the main directory of this source tree, or the | |
7 | * OpenIB.org BSD license below: | |
8 | * | |
9 | * Redistribution and use in source and binary forms, with or | |
10 | * without modification, are permitted provided that the following | |
11 | * conditions are met: | |
12 | * | |
13 | * - Redistributions of source code must retain the above | |
14 | * copyright notice, this list of conditions and the following | |
15 | * disclaimer. | |
16 | * | |
17 | * - Redistributions in binary form must reproduce the above | |
18 | * copyright notice, this list of conditions and the following | |
19 | * disclaimer in the documentation and/or other materials | |
20 | * provided with the distribution. | |
21 | * | |
22 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
23 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
24 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
25 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
26 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
27 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
28 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
29 | * SOFTWARE. | |
30 | */ | |
31 | ||
32 | #include <crypto/aead.h> | |
33 | #include <linux/highmem.h> | |
34 | #include <linux/module.h> | |
35 | #include <linux/netdevice.h> | |
36 | #include <net/dst.h> | |
37 | #include <net/inet_connection_sock.h> | |
38 | #include <net/tcp.h> | |
39 | #include <net/tls.h> | |
f6d827b1 | 40 | #include <linux/skbuff_ref.h> |
e8f69799 | 41 | |
58790314 | 42 | #include "tls.h" |
8538d29c JK |
43 | #include "trace.h" |
44 | ||
e8f69799 IL |
45 | /* device_offload_lock is used to synchronize tls_dev_add |
46 | * against NETDEV_DOWN notifications. | |
47 | */ | |
48 | static DECLARE_RWSEM(device_offload_lock); | |
49 | ||
7adc91e0 | 50 | static struct workqueue_struct *destruct_wq __read_mostly; |
e8f69799 | 51 | |
e8f69799 | 52 | static LIST_HEAD(tls_device_list); |
c55dcdd4 | 53 | static LIST_HEAD(tls_device_down_list); |
e8f69799 IL |
54 | static DEFINE_SPINLOCK(tls_device_lock); |
55 | ||
6b47808f JK |
56 | static struct page *dummy_page; |
57 | ||
e8f69799 IL |
58 | static void tls_device_free_ctx(struct tls_context *ctx) |
59 | { | |
1c1cb311 | 60 | if (ctx->tx_conf == TLS_HW) |
4799ac81 BP |
61 | kfree(tls_offload_ctx_tx(ctx)); |
62 | ||
63 | if (ctx->rx_conf == TLS_HW) | |
64 | kfree(tls_offload_ctx_rx(ctx)); | |
e8f69799 | 65 | |
15a7dea7 | 66 | tls_ctx_free(NULL, ctx); |
e8f69799 IL |
67 | } |
68 | ||
7adc91e0 | 69 | static void tls_device_tx_del_task(struct work_struct *work) |
e8f69799 | 70 | { |
7adc91e0 TT |
71 | struct tls_offload_context_tx *offload_ctx = |
72 | container_of(work, struct tls_offload_context_tx, destruct_work); | |
73 | struct tls_context *ctx = offload_ctx->ctx; | |
94ce3b64 MM |
74 | struct net_device *netdev; |
75 | ||
76 | /* Safe, because this is the destroy flow, refcount is 0, so | |
77 | * tls_device_down can't store this field in parallel. | |
78 | */ | |
79 | netdev = rcu_dereference_protected(ctx->netdev, | |
80 | !refcount_read(&ctx->refcount)); | |
e8f69799 | 81 | |
7adc91e0 TT |
82 | netdev->tlsdev_ops->tls_dev_del(netdev, ctx, TLS_OFFLOAD_CTX_DIR_TX); |
83 | dev_put(netdev); | |
84 | ctx->netdev = NULL; | |
85 | tls_device_free_ctx(ctx); | |
e8f69799 IL |
86 | } |
87 | ||
88 | static void tls_device_queue_ctx_destruction(struct tls_context *ctx) | |
89 | { | |
94ce3b64 | 90 | struct net_device *netdev; |
e8f69799 | 91 | unsigned long flags; |
113671b2 | 92 | bool async_cleanup; |
e8f69799 IL |
93 | |
94 | spin_lock_irqsave(&tls_device_lock, flags); | |
113671b2 TT |
95 | if (unlikely(!refcount_dec_and_test(&ctx->refcount))) { |
96 | spin_unlock_irqrestore(&tls_device_lock, flags); | |
97 | return; | |
98 | } | |
f08d8c1b | 99 | |
7adc91e0 | 100 | list_del(&ctx->list); /* Remove from tls_device_list / tls_device_down_list */ |
94ce3b64 MM |
101 | |
102 | /* Safe, because this is the destroy flow, refcount is 0, so | |
103 | * tls_device_down can't store this field in parallel. | |
104 | */ | |
105 | netdev = rcu_dereference_protected(ctx->netdev, | |
106 | !refcount_read(&ctx->refcount)); | |
107 | ||
108 | async_cleanup = netdev && ctx->tx_conf == TLS_HW; | |
113671b2 | 109 | if (async_cleanup) { |
7adc91e0 | 110 | struct tls_offload_context_tx *offload_ctx = tls_offload_ctx_tx(ctx); |
e8f69799 | 111 | |
7adc91e0 | 112 | /* queue_work inside the spinlock |
113671b2 TT |
113 | * to make sure tls_device_down waits for that work. |
114 | */ | |
7adc91e0 | 115 | queue_work(destruct_wq, &offload_ctx->destruct_work); |
113671b2 | 116 | } |
e8f69799 | 117 | spin_unlock_irqrestore(&tls_device_lock, flags); |
113671b2 TT |
118 | |
119 | if (!async_cleanup) | |
120 | tls_device_free_ctx(ctx); | |
e8f69799 IL |
121 | } |
122 | ||
123 | /* We assume that the socket is already connected */ | |
124 | static struct net_device *get_netdev_for_sock(struct sock *sk) | |
125 | { | |
126 | struct dst_entry *dst = sk_dst_get(sk); | |
127 | struct net_device *netdev = NULL; | |
128 | ||
129 | if (likely(dst)) { | |
153cbd13 | 130 | netdev = netdev_sk_get_lowest_dev(dst->dev, sk); |
e8f69799 IL |
131 | dev_hold(netdev); |
132 | } | |
133 | ||
134 | dst_release(dst); | |
135 | ||
136 | return netdev; | |
137 | } | |
138 | ||
139 | static void destroy_record(struct tls_record_info *record) | |
140 | { | |
7ccd4519 | 141 | int i; |
e8f69799 | 142 | |
7ccd4519 | 143 | for (i = 0; i < record->num_frags; i++) |
c420c989 | 144 | __skb_frag_unref(&record->frags[i], false); |
e8f69799 IL |
145 | kfree(record); |
146 | } | |
147 | ||
d80a1b9d | 148 | static void delete_all_records(struct tls_offload_context_tx *offload_ctx) |
e8f69799 IL |
149 | { |
150 | struct tls_record_info *info, *temp; | |
151 | ||
152 | list_for_each_entry_safe(info, temp, &offload_ctx->records_list, list) { | |
153 | list_del(&info->list); | |
154 | destroy_record(info); | |
155 | } | |
156 | ||
157 | offload_ctx->retransmit_hint = NULL; | |
158 | } | |
159 | ||
160 | static void tls_icsk_clean_acked(struct sock *sk, u32 acked_seq) | |
161 | { | |
162 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
163 | struct tls_record_info *info, *temp; | |
d80a1b9d | 164 | struct tls_offload_context_tx *ctx; |
e8f69799 IL |
165 | u64 deleted_records = 0; |
166 | unsigned long flags; | |
167 | ||
168 | if (!tls_ctx) | |
169 | return; | |
170 | ||
d80a1b9d | 171 | ctx = tls_offload_ctx_tx(tls_ctx); |
e8f69799 IL |
172 | |
173 | spin_lock_irqsave(&ctx->lock, flags); | |
174 | info = ctx->retransmit_hint; | |
6e3d02b6 | 175 | if (info && !before(acked_seq, info->end_seq)) |
e8f69799 | 176 | ctx->retransmit_hint = NULL; |
e8f69799 IL |
177 | |
178 | list_for_each_entry_safe(info, temp, &ctx->records_list, list) { | |
179 | if (before(acked_seq, info->end_seq)) | |
180 | break; | |
181 | list_del(&info->list); | |
182 | ||
183 | destroy_record(info); | |
184 | deleted_records++; | |
185 | } | |
186 | ||
187 | ctx->unacked_record_sn += deleted_records; | |
188 | spin_unlock_irqrestore(&ctx->lock, flags); | |
189 | } | |
190 | ||
191 | /* At this point, there should be no references on this | |
192 | * socket and no in-flight SKBs associated with this | |
193 | * socket, so it is safe to free all the resources. | |
194 | */ | |
8d5a49e9 | 195 | void tls_device_sk_destruct(struct sock *sk) |
e8f69799 IL |
196 | { |
197 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
d80a1b9d | 198 | struct tls_offload_context_tx *ctx = tls_offload_ctx_tx(tls_ctx); |
e8f69799 | 199 | |
4799ac81 | 200 | tls_ctx->sk_destruct(sk); |
e8f69799 | 201 | |
4799ac81 BP |
202 | if (tls_ctx->tx_conf == TLS_HW) { |
203 | if (ctx->open_record) | |
204 | destroy_record(ctx->open_record); | |
205 | delete_all_records(ctx); | |
206 | crypto_free_aead(ctx->aead_send); | |
207 | clean_acked_data_disable(inet_csk(sk)); | |
208 | } | |
e8f69799 | 209 | |
f08d8c1b | 210 | tls_device_queue_ctx_destruction(tls_ctx); |
e8f69799 | 211 | } |
8d5a49e9 | 212 | EXPORT_SYMBOL_GPL(tls_device_sk_destruct); |
e8f69799 | 213 | |
35b71a34 JK |
214 | void tls_device_free_resources_tx(struct sock *sk) |
215 | { | |
216 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
217 | ||
218 | tls_free_partial_record(sk, tls_ctx); | |
219 | } | |
220 | ||
8538d29c JK |
221 | void tls_offload_tx_resync_request(struct sock *sk, u32 got_seq, u32 exp_seq) |
222 | { | |
223 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
224 | ||
225 | trace_tls_device_tx_resync_req(sk, got_seq, exp_seq); | |
226 | WARN_ON(test_and_set_bit(TLS_TX_SYNC_SCHED, &tls_ctx->flags)); | |
227 | } | |
228 | EXPORT_SYMBOL_GPL(tls_offload_tx_resync_request); | |
229 | ||
50180074 JK |
230 | static void tls_device_resync_tx(struct sock *sk, struct tls_context *tls_ctx, |
231 | u32 seq) | |
232 | { | |
233 | struct net_device *netdev; | |
234 | struct sk_buff *skb; | |
b5d9a834 | 235 | int err = 0; |
50180074 JK |
236 | u8 *rcd_sn; |
237 | ||
238 | skb = tcp_write_queue_tail(sk); | |
239 | if (skb) | |
240 | TCP_SKB_CB(skb)->eor = 1; | |
241 | ||
242 | rcd_sn = tls_ctx->tx.rec_seq; | |
243 | ||
8538d29c | 244 | trace_tls_device_tx_resync_send(sk, seq, rcd_sn); |
50180074 | 245 | down_read(&device_offload_lock); |
94ce3b64 MM |
246 | netdev = rcu_dereference_protected(tls_ctx->netdev, |
247 | lockdep_is_held(&device_offload_lock)); | |
50180074 | 248 | if (netdev) |
b5d9a834 DM |
249 | err = netdev->tlsdev_ops->tls_dev_resync(netdev, sk, seq, |
250 | rcd_sn, | |
251 | TLS_OFFLOAD_CTX_DIR_TX); | |
50180074 | 252 | up_read(&device_offload_lock); |
b5d9a834 DM |
253 | if (err) |
254 | return; | |
50180074 JK |
255 | |
256 | clear_bit_unlock(TLS_TX_SYNC_SCHED, &tls_ctx->flags); | |
257 | } | |
258 | ||
e8f69799 IL |
259 | static void tls_append_frag(struct tls_record_info *record, |
260 | struct page_frag *pfrag, | |
261 | int size) | |
262 | { | |
263 | skb_frag_t *frag; | |
264 | ||
265 | frag = &record->frags[record->num_frags - 1]; | |
d8e18a51 | 266 | if (skb_frag_page(frag) == pfrag->page && |
b54c9d5b | 267 | skb_frag_off(frag) + skb_frag_size(frag) == pfrag->offset) { |
d8e18a51 | 268 | skb_frag_size_add(frag, size); |
e8f69799 IL |
269 | } else { |
270 | ++frag; | |
b51f4113 YL |
271 | skb_frag_fill_page_desc(frag, pfrag->page, pfrag->offset, |
272 | size); | |
e8f69799 IL |
273 | ++record->num_frags; |
274 | get_page(pfrag->page); | |
275 | } | |
276 | ||
277 | pfrag->offset += size; | |
278 | record->len += size; | |
279 | } | |
280 | ||
281 | static int tls_push_record(struct sock *sk, | |
282 | struct tls_context *ctx, | |
d80a1b9d | 283 | struct tls_offload_context_tx *offload_ctx, |
e8f69799 | 284 | struct tls_record_info *record, |
e7b159a4 | 285 | int flags) |
e8f69799 | 286 | { |
4509de14 | 287 | struct tls_prot_info *prot = &ctx->prot_info; |
e8f69799 | 288 | struct tcp_sock *tp = tcp_sk(sk); |
e8f69799 IL |
289 | skb_frag_t *frag; |
290 | int i; | |
291 | ||
e8f69799 | 292 | record->end_seq = tp->write_seq + record->len; |
d4774ac0 | 293 | list_add_tail_rcu(&record->list, &offload_ctx->records_list); |
e8f69799 | 294 | offload_ctx->open_record = NULL; |
50180074 JK |
295 | |
296 | if (test_bit(TLS_TX_SYNC_SCHED, &ctx->flags)) | |
297 | tls_device_resync_tx(sk, ctx, tp->write_seq); | |
298 | ||
fb0f886f | 299 | tls_advance_record_sn(sk, prot, &ctx->tx); |
e8f69799 IL |
300 | |
301 | for (i = 0; i < record->num_frags; i++) { | |
302 | frag = &record->frags[i]; | |
303 | sg_unmark_end(&offload_ctx->sg_tx_data[i]); | |
304 | sg_set_page(&offload_ctx->sg_tx_data[i], skb_frag_page(frag), | |
b54c9d5b | 305 | skb_frag_size(frag), skb_frag_off(frag)); |
d8e18a51 | 306 | sk_mem_charge(sk, skb_frag_size(frag)); |
e8f69799 IL |
307 | get_page(skb_frag_page(frag)); |
308 | } | |
309 | sg_mark_end(&offload_ctx->sg_tx_data[record->num_frags - 1]); | |
310 | ||
311 | /* all ready, send */ | |
312 | return tls_push_sg(sk, ctx, offload_ctx->sg_tx_data, 0, flags); | |
313 | } | |
314 | ||
6b47808f JK |
315 | static void tls_device_record_close(struct sock *sk, |
316 | struct tls_context *ctx, | |
317 | struct tls_record_info *record, | |
318 | struct page_frag *pfrag, | |
319 | unsigned char record_type) | |
e7b159a4 JK |
320 | { |
321 | struct tls_prot_info *prot = &ctx->prot_info; | |
6b47808f | 322 | struct page_frag dummy_tag_frag; |
e7b159a4 JK |
323 | |
324 | /* append tag | |
325 | * device will fill in the tag, we just need to append a placeholder | |
326 | * use socket memory to improve coalescing (re-using a single buffer | |
327 | * increases frag count) | |
6b47808f | 328 | * if we can't allocate memory now use the dummy page |
e7b159a4 | 329 | */ |
6b47808f JK |
330 | if (unlikely(pfrag->size - pfrag->offset < prot->tag_size) && |
331 | !skb_page_frag_refill(prot->tag_size, pfrag, sk->sk_allocation)) { | |
332 | dummy_tag_frag.page = dummy_page; | |
333 | dummy_tag_frag.offset = 0; | |
334 | pfrag = &dummy_tag_frag; | |
e7b159a4 | 335 | } |
6b47808f | 336 | tls_append_frag(record, pfrag, prot->tag_size); |
e7b159a4 JK |
337 | |
338 | /* fill prepend */ | |
339 | tls_fill_prepend(ctx, skb_frag_address(&record->frags[0]), | |
340 | record->len - prot->overhead_size, | |
6942a284 | 341 | record_type); |
e7b159a4 JK |
342 | } |
343 | ||
d80a1b9d | 344 | static int tls_create_new_record(struct tls_offload_context_tx *offload_ctx, |
e8f69799 IL |
345 | struct page_frag *pfrag, |
346 | size_t prepend_size) | |
347 | { | |
348 | struct tls_record_info *record; | |
349 | skb_frag_t *frag; | |
350 | ||
351 | record = kmalloc(sizeof(*record), GFP_KERNEL); | |
352 | if (!record) | |
353 | return -ENOMEM; | |
354 | ||
355 | frag = &record->frags[0]; | |
b51f4113 YL |
356 | skb_frag_fill_page_desc(frag, pfrag->page, pfrag->offset, |
357 | prepend_size); | |
e8f69799 IL |
358 | |
359 | get_page(pfrag->page); | |
360 | pfrag->offset += prepend_size; | |
361 | ||
362 | record->num_frags = 1; | |
363 | record->len = prepend_size; | |
364 | offload_ctx->open_record = record; | |
365 | return 0; | |
366 | } | |
367 | ||
368 | static int tls_do_allocation(struct sock *sk, | |
d80a1b9d | 369 | struct tls_offload_context_tx *offload_ctx, |
e8f69799 IL |
370 | struct page_frag *pfrag, |
371 | size_t prepend_size) | |
372 | { | |
373 | int ret; | |
374 | ||
375 | if (!offload_ctx->open_record) { | |
376 | if (unlikely(!skb_page_frag_refill(prepend_size, pfrag, | |
377 | sk->sk_allocation))) { | |
d5bee737 | 378 | READ_ONCE(sk->sk_prot)->enter_memory_pressure(sk); |
e8f69799 IL |
379 | sk_stream_moderate_sndbuf(sk); |
380 | return -ENOMEM; | |
381 | } | |
382 | ||
383 | ret = tls_create_new_record(offload_ctx, pfrag, prepend_size); | |
384 | if (ret) | |
385 | return ret; | |
386 | ||
387 | if (pfrag->size > pfrag->offset) | |
388 | return 0; | |
389 | } | |
390 | ||
391 | if (!sk_page_frag_refill(sk, pfrag)) | |
392 | return -ENOMEM; | |
393 | ||
394 | return 0; | |
395 | } | |
396 | ||
e681cc60 JK |
397 | static int tls_device_copy_data(void *addr, size_t bytes, struct iov_iter *i) |
398 | { | |
399 | size_t pre_copy, nocache; | |
400 | ||
401 | pre_copy = ~((unsigned long)addr - 1) & (SMP_CACHE_BYTES - 1); | |
402 | if (pre_copy) { | |
403 | pre_copy = min(pre_copy, bytes); | |
404 | if (copy_from_iter(addr, pre_copy, i) != pre_copy) | |
405 | return -EFAULT; | |
406 | bytes -= pre_copy; | |
407 | addr += pre_copy; | |
408 | } | |
409 | ||
410 | nocache = round_down(bytes, SMP_CACHE_BYTES); | |
411 | if (copy_from_iter_nocache(addr, nocache, i) != nocache) | |
412 | return -EFAULT; | |
413 | bytes -= nocache; | |
414 | addr += nocache; | |
415 | ||
416 | if (bytes && copy_from_iter(addr, bytes, i) != bytes) | |
417 | return -EFAULT; | |
418 | ||
419 | return 0; | |
420 | } | |
421 | ||
e8f69799 | 422 | static int tls_push_data(struct sock *sk, |
3dc8976c | 423 | struct iov_iter *iter, |
e8f69799 | 424 | size_t size, int flags, |
3dc8976c | 425 | unsigned char record_type) |
e8f69799 IL |
426 | { |
427 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
4509de14 | 428 | struct tls_prot_info *prot = &tls_ctx->prot_info; |
d80a1b9d | 429 | struct tls_offload_context_tx *ctx = tls_offload_ctx_tx(tls_ctx); |
3afef8c7 | 430 | struct tls_record_info *record; |
41477662 | 431 | int tls_push_record_flags; |
e8f69799 IL |
432 | struct page_frag *pfrag; |
433 | size_t orig_size = size; | |
434 | u32 max_open_record_len; | |
ea1dd3e9 | 435 | bool more = false; |
e8f69799 | 436 | bool done = false; |
ea1dd3e9 | 437 | int copy, rc = 0; |
e8f69799 IL |
438 | long timeo; |
439 | ||
440 | if (flags & | |
c004b0e0 HR |
441 | ~(MSG_MORE | MSG_DONTWAIT | MSG_NOSIGNAL | |
442 | MSG_SPLICE_PAGES | MSG_EOR)) | |
4a5cdc60 | 443 | return -EOPNOTSUPP; |
e8f69799 | 444 | |
c004b0e0 HR |
445 | if ((flags & (MSG_MORE | MSG_EOR)) == (MSG_MORE | MSG_EOR)) |
446 | return -EINVAL; | |
447 | ||
93277b25 | 448 | if (unlikely(sk->sk_err)) |
e8f69799 IL |
449 | return -sk->sk_err; |
450 | ||
41477662 | 451 | flags |= MSG_SENDPAGE_DECRYPTED; |
f8dd95b2 | 452 | tls_push_record_flags = flags | MSG_MORE; |
41477662 | 453 | |
e8f69799 | 454 | timeo = sock_sndtimeo(sk, flags & MSG_DONTWAIT); |
94850257 BP |
455 | if (tls_is_partially_sent_record(tls_ctx)) { |
456 | rc = tls_push_partial_record(sk, tls_ctx, flags); | |
457 | if (rc < 0) | |
458 | return rc; | |
459 | } | |
e8f69799 IL |
460 | |
461 | pfrag = sk_page_frag(sk); | |
462 | ||
463 | /* TLS_HEADER_SIZE is not counted as part of the TLS record, and | |
464 | * we need to leave room for an authentication tag. | |
465 | */ | |
466 | max_open_record_len = TLS_MAX_PAYLOAD_SIZE + | |
4509de14 | 467 | prot->prepend_size; |
e8f69799 | 468 | do { |
34ef1ed1 JK |
469 | rc = tls_do_allocation(sk, ctx, pfrag, prot->prepend_size); |
470 | if (unlikely(rc)) { | |
e8f69799 IL |
471 | rc = sk_stream_wait_memory(sk, &timeo); |
472 | if (!rc) | |
473 | continue; | |
474 | ||
475 | record = ctx->open_record; | |
476 | if (!record) | |
477 | break; | |
478 | handle_error: | |
479 | if (record_type != TLS_RECORD_TYPE_DATA) { | |
480 | /* avoid sending partial | |
481 | * record with type != | |
482 | * application_data | |
483 | */ | |
484 | size = orig_size; | |
485 | destroy_record(record); | |
486 | ctx->open_record = NULL; | |
4509de14 | 487 | } else if (record->len > prot->prepend_size) { |
e8f69799 IL |
488 | goto last_record; |
489 | } | |
490 | ||
491 | break; | |
492 | } | |
493 | ||
494 | record = ctx->open_record; | |
e8f69799 | 495 | |
c1318b39 | 496 | copy = min_t(size_t, size, max_open_record_len - record->len); |
3dc8976c | 497 | if (copy && (flags & MSG_SPLICE_PAGES)) { |
24763c9c DH |
498 | struct page_frag zc_pfrag; |
499 | struct page **pages = &zc_pfrag.page; | |
500 | size_t off; | |
501 | ||
3dc8976c DH |
502 | rc = iov_iter_extract_pages(iter, &pages, |
503 | copy, 1, 0, &off); | |
24763c9c DH |
504 | if (rc <= 0) { |
505 | if (rc == 0) | |
506 | rc = -EIO; | |
507 | goto handle_error; | |
508 | } | |
509 | copy = rc; | |
510 | ||
511 | if (WARN_ON_ONCE(!sendpage_ok(zc_pfrag.page))) { | |
3dc8976c | 512 | iov_iter_revert(iter, copy); |
24763c9c DH |
513 | rc = -EIO; |
514 | goto handle_error; | |
515 | } | |
516 | ||
517 | zc_pfrag.offset = off; | |
518 | zc_pfrag.size = copy; | |
519 | tls_append_frag(record, &zc_pfrag, copy); | |
c1318b39 BP |
520 | } else if (copy) { |
521 | copy = min_t(size_t, copy, pfrag->size - pfrag->offset); | |
522 | ||
a0df7194 | 523 | rc = tls_device_copy_data(page_address(pfrag->page) + |
c1318b39 | 524 | pfrag->offset, copy, |
3dc8976c | 525 | iter); |
a0df7194 MM |
526 | if (rc) |
527 | goto handle_error; | |
528 | tls_append_frag(record, pfrag, copy); | |
529 | } | |
e8f69799 IL |
530 | |
531 | size -= copy; | |
532 | if (!size) { | |
533 | last_record: | |
534 | tls_push_record_flags = flags; | |
f8dd95b2 | 535 | if (flags & MSG_MORE) { |
ea1dd3e9 | 536 | more = true; |
e8f69799 IL |
537 | break; |
538 | } | |
539 | ||
540 | done = true; | |
541 | } | |
542 | ||
543 | if (done || record->len >= max_open_record_len || | |
544 | (record->num_frags >= MAX_SKB_FRAGS - 1)) { | |
6b47808f JK |
545 | tls_device_record_close(sk, tls_ctx, record, |
546 | pfrag, record_type); | |
e7b159a4 | 547 | |
e8f69799 IL |
548 | rc = tls_push_record(sk, |
549 | tls_ctx, | |
550 | ctx, | |
551 | record, | |
e7b159a4 | 552 | tls_push_record_flags); |
e8f69799 IL |
553 | if (rc < 0) |
554 | break; | |
555 | } | |
556 | } while (!done); | |
557 | ||
ea1dd3e9 RM |
558 | tls_ctx->pending_open_record_frags = more; |
559 | ||
e8f69799 IL |
560 | if (orig_size - size > 0) |
561 | rc = orig_size - size; | |
562 | ||
563 | return rc; | |
564 | } | |
565 | ||
566 | int tls_device_sendmsg(struct sock *sk, struct msghdr *msg, size_t size) | |
567 | { | |
568 | unsigned char record_type = TLS_RECORD_TYPE_DATA; | |
79ffe608 | 569 | struct tls_context *tls_ctx = tls_get_ctx(sk); |
e8f69799 IL |
570 | int rc; |
571 | ||
24763c9c DH |
572 | if (!tls_ctx->zerocopy_sendfile) |
573 | msg->msg_flags &= ~MSG_SPLICE_PAGES; | |
574 | ||
79ffe608 | 575 | mutex_lock(&tls_ctx->tx_lock); |
e8f69799 IL |
576 | lock_sock(sk); |
577 | ||
578 | if (unlikely(msg->msg_controllen)) { | |
58790314 | 579 | rc = tls_process_cmsg(sk, msg, &record_type); |
e8f69799 IL |
580 | if (rc) |
581 | goto out; | |
582 | } | |
583 | ||
3dc8976c DH |
584 | rc = tls_push_data(sk, &msg->msg_iter, size, msg->msg_flags, |
585 | record_type); | |
e8f69799 IL |
586 | |
587 | out: | |
588 | release_sock(sk); | |
79ffe608 | 589 | mutex_unlock(&tls_ctx->tx_lock); |
e8f69799 IL |
590 | return rc; |
591 | } | |
592 | ||
d4c1e80b DH |
593 | void tls_device_splice_eof(struct socket *sock) |
594 | { | |
595 | struct sock *sk = sock->sk; | |
596 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
3dc8976c | 597 | struct iov_iter iter = {}; |
d4c1e80b DH |
598 | |
599 | if (!tls_is_partially_sent_record(tls_ctx)) | |
600 | return; | |
601 | ||
602 | mutex_lock(&tls_ctx->tx_lock); | |
603 | lock_sock(sk); | |
604 | ||
605 | if (tls_is_partially_sent_record(tls_ctx)) { | |
3dc8976c DH |
606 | iov_iter_bvec(&iter, ITER_SOURCE, NULL, 0, 0); |
607 | tls_push_data(sk, &iter, 0, 0, TLS_RECORD_TYPE_DATA); | |
d4c1e80b DH |
608 | } |
609 | ||
610 | release_sock(sk); | |
611 | mutex_unlock(&tls_ctx->tx_lock); | |
612 | } | |
613 | ||
d80a1b9d | 614 | struct tls_record_info *tls_get_record(struct tls_offload_context_tx *context, |
e8f69799 IL |
615 | u32 seq, u64 *p_record_sn) |
616 | { | |
617 | u64 record_sn = context->hint_record_sn; | |
06f5201c | 618 | struct tls_record_info *info, *last; |
e8f69799 IL |
619 | |
620 | info = context->retransmit_hint; | |
621 | if (!info || | |
622 | before(seq, info->end_seq - info->len)) { | |
623 | /* if retransmit_hint is irrelevant start | |
72a0f6d0 | 624 | * from the beginning of the list |
e8f69799 | 625 | */ |
d4774ac0 JK |
626 | info = list_first_entry_or_null(&context->records_list, |
627 | struct tls_record_info, list); | |
628 | if (!info) | |
629 | return NULL; | |
06f5201c RM |
630 | /* send the start_marker record if seq number is before the |
631 | * tls offload start marker sequence number. This record is | |
632 | * required to handle TCP packets which are before TLS offload | |
633 | * started. | |
634 | * And if it's not start marker, look if this seq number | |
635 | * belongs to the list. | |
636 | */ | |
637 | if (likely(!tls_record_is_start_marker(info))) { | |
638 | /* we have the first record, get the last record to see | |
639 | * if this seq number belongs to the list. | |
640 | */ | |
641 | last = list_last_entry(&context->records_list, | |
642 | struct tls_record_info, list); | |
643 | ||
644 | if (!between(seq, tls_record_start_seq(info), | |
645 | last->end_seq)) | |
646 | return NULL; | |
647 | } | |
e8f69799 IL |
648 | record_sn = context->unacked_record_sn; |
649 | } | |
650 | ||
d4774ac0 JK |
651 | /* We just need the _rcu for the READ_ONCE() */ |
652 | rcu_read_lock(); | |
653 | list_for_each_entry_from_rcu(info, &context->records_list, list) { | |
e8f69799 IL |
654 | if (before(seq, info->end_seq)) { |
655 | if (!context->retransmit_hint || | |
656 | after(info->end_seq, | |
657 | context->retransmit_hint->end_seq)) { | |
658 | context->hint_record_sn = record_sn; | |
659 | context->retransmit_hint = info; | |
660 | } | |
661 | *p_record_sn = record_sn; | |
d4774ac0 | 662 | goto exit_rcu_unlock; |
e8f69799 IL |
663 | } |
664 | record_sn++; | |
665 | } | |
d4774ac0 | 666 | info = NULL; |
e8f69799 | 667 | |
d4774ac0 JK |
668 | exit_rcu_unlock: |
669 | rcu_read_unlock(); | |
670 | return info; | |
e8f69799 IL |
671 | } |
672 | EXPORT_SYMBOL(tls_get_record); | |
673 | ||
674 | static int tls_device_push_pending_record(struct sock *sk, int flags) | |
675 | { | |
3dc8976c | 676 | struct iov_iter iter; |
e8f69799 | 677 | |
3dc8976c DH |
678 | iov_iter_kvec(&iter, ITER_SOURCE, NULL, 0, 0); |
679 | return tls_push_data(sk, &iter, 0, flags, TLS_RECORD_TYPE_DATA); | |
e8f69799 IL |
680 | } |
681 | ||
7463d3a2 BP |
682 | void tls_device_write_space(struct sock *sk, struct tls_context *ctx) |
683 | { | |
02b1fa07 | 684 | if (tls_is_partially_sent_record(ctx)) { |
7463d3a2 BP |
685 | gfp_t sk_allocation = sk->sk_allocation; |
686 | ||
02b1fa07 JK |
687 | WARN_ON_ONCE(sk->sk_write_pending); |
688 | ||
7463d3a2 | 689 | sk->sk_allocation = GFP_ATOMIC; |
41477662 JK |
690 | tls_push_partial_record(sk, ctx, |
691 | MSG_DONTWAIT | MSG_NOSIGNAL | | |
692 | MSG_SENDPAGE_DECRYPTED); | |
7463d3a2 BP |
693 | sk->sk_allocation = sk_allocation; |
694 | } | |
7463d3a2 BP |
695 | } |
696 | ||
e52972c1 | 697 | static void tls_device_resync_rx(struct tls_context *tls_ctx, |
89fec474 | 698 | struct sock *sk, u32 seq, u8 *rcd_sn) |
e52972c1 | 699 | { |
8538d29c | 700 | struct tls_offload_context_rx *rx_ctx = tls_offload_ctx_rx(tls_ctx); |
e52972c1 JK |
701 | struct net_device *netdev; |
702 | ||
8538d29c | 703 | trace_tls_device_rx_resync_send(sk, seq, rcd_sn, rx_ctx->resync_type); |
05fc8b6c | 704 | rcu_read_lock(); |
94ce3b64 | 705 | netdev = rcu_dereference(tls_ctx->netdev); |
e52972c1 | 706 | if (netdev) |
eeb2efaf JK |
707 | netdev->tlsdev_ops->tls_dev_resync(netdev, sk, seq, rcd_sn, |
708 | TLS_OFFLOAD_CTX_DIR_RX); | |
05fc8b6c | 709 | rcu_read_unlock(); |
a4d26fdb | 710 | TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSRXDEVICERESYNC); |
e52972c1 JK |
711 | } |
712 | ||
ed9b7646 BP |
713 | static bool |
714 | tls_device_rx_resync_async(struct tls_offload_resync_async *resync_async, | |
138559b9 | 715 | s64 resync_req, u32 *seq, u16 *rcd_delta) |
ed9b7646 BP |
716 | { |
717 | u32 is_async = resync_req & RESYNC_REQ_ASYNC; | |
718 | u32 req_seq = resync_req >> 32; | |
719 | u32 req_end = req_seq + ((resync_req >> 16) & 0xffff); | |
138559b9 TT |
720 | u16 i; |
721 | ||
722 | *rcd_delta = 0; | |
ed9b7646 BP |
723 | |
724 | if (is_async) { | |
138559b9 TT |
725 | /* shouldn't get to wraparound: |
726 | * too long in async stage, something bad happened | |
727 | */ | |
728 | if (WARN_ON_ONCE(resync_async->rcd_delta == USHRT_MAX)) | |
729 | return false; | |
730 | ||
ed9b7646 BP |
731 | /* asynchronous stage: log all headers seq such that |
732 | * req_seq <= seq <= end_seq, and wait for real resync request | |
733 | */ | |
138559b9 TT |
734 | if (before(*seq, req_seq)) |
735 | return false; | |
736 | if (!after(*seq, req_end) && | |
ed9b7646 BP |
737 | resync_async->loglen < TLS_DEVICE_RESYNC_ASYNC_LOGMAX) |
738 | resync_async->log[resync_async->loglen++] = *seq; | |
739 | ||
138559b9 TT |
740 | resync_async->rcd_delta++; |
741 | ||
ed9b7646 BP |
742 | return false; |
743 | } | |
744 | ||
745 | /* synchronous stage: check against the logged entries and | |
746 | * proceed to check the next entries if no match was found | |
747 | */ | |
138559b9 TT |
748 | for (i = 0; i < resync_async->loglen; i++) |
749 | if (req_seq == resync_async->log[i] && | |
750 | atomic64_try_cmpxchg(&resync_async->req, &resync_req, 0)) { | |
751 | *rcd_delta = resync_async->rcd_delta - i; | |
ed9b7646 | 752 | *seq = req_seq; |
138559b9 TT |
753 | resync_async->loglen = 0; |
754 | resync_async->rcd_delta = 0; | |
ed9b7646 BP |
755 | return true; |
756 | } | |
138559b9 TT |
757 | |
758 | resync_async->loglen = 0; | |
759 | resync_async->rcd_delta = 0; | |
ed9b7646 BP |
760 | |
761 | if (req_seq == *seq && | |
762 | atomic64_try_cmpxchg(&resync_async->req, | |
763 | &resync_req, 0)) | |
764 | return true; | |
765 | ||
766 | return false; | |
767 | } | |
768 | ||
f953d33b | 769 | void tls_device_rx_resync_new_rec(struct sock *sk, u32 rcd_len, u32 seq) |
4799ac81 BP |
770 | { |
771 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
4799ac81 | 772 | struct tls_offload_context_rx *rx_ctx; |
f953d33b | 773 | u8 rcd_sn[TLS_MAX_REC_SEQ_SIZE]; |
acb5a07a | 774 | u32 sock_data, is_req_pending; |
f953d33b | 775 | struct tls_prot_info *prot; |
4799ac81 | 776 | s64 resync_req; |
138559b9 | 777 | u16 rcd_delta; |
4799ac81 BP |
778 | u32 req_seq; |
779 | ||
780 | if (tls_ctx->rx_conf != TLS_HW) | |
781 | return; | |
c55dcdd4 MM |
782 | if (unlikely(test_bit(TLS_RX_DEV_DEGRADED, &tls_ctx->flags))) |
783 | return; | |
4799ac81 | 784 | |
f953d33b | 785 | prot = &tls_ctx->prot_info; |
4799ac81 | 786 | rx_ctx = tls_offload_ctx_rx(tls_ctx); |
f953d33b JK |
787 | memcpy(rcd_sn, tls_ctx->rx.rec_seq, prot->rec_seq_size); |
788 | ||
789 | switch (rx_ctx->resync_type) { | |
790 | case TLS_OFFLOAD_SYNC_TYPE_DRIVER_REQ: | |
791 | resync_req = atomic64_read(&rx_ctx->resync_req); | |
792 | req_seq = resync_req >> 32; | |
793 | seq += TLS_HEADER_SIZE - 1; | |
acb5a07a | 794 | is_req_pending = resync_req; |
f953d33b | 795 | |
acb5a07a | 796 | if (likely(!is_req_pending) || req_seq != seq || |
f953d33b JK |
797 | !atomic64_try_cmpxchg(&rx_ctx->resync_req, &resync_req, 0)) |
798 | return; | |
799 | break; | |
800 | case TLS_OFFLOAD_SYNC_TYPE_CORE_NEXT_HINT: | |
801 | if (likely(!rx_ctx->resync_nh_do_now)) | |
802 | return; | |
803 | ||
804 | /* head of next rec is already in, note that the sock_inq will | |
805 | * include the currently parsed message when called from parser | |
806 | */ | |
8538d29c JK |
807 | sock_data = tcp_inq(sk); |
808 | if (sock_data > rcd_len) { | |
809 | trace_tls_device_rx_resync_nh_delay(sk, sock_data, | |
810 | rcd_len); | |
f953d33b | 811 | return; |
8538d29c | 812 | } |
f953d33b JK |
813 | |
814 | rx_ctx->resync_nh_do_now = 0; | |
815 | seq += rcd_len; | |
816 | tls_bigint_increment(rcd_sn, prot->rec_seq_size); | |
817 | break; | |
ed9b7646 BP |
818 | case TLS_OFFLOAD_SYNC_TYPE_DRIVER_REQ_ASYNC: |
819 | resync_req = atomic64_read(&rx_ctx->resync_async->req); | |
820 | is_req_pending = resync_req; | |
821 | if (likely(!is_req_pending)) | |
822 | return; | |
823 | ||
824 | if (!tls_device_rx_resync_async(rx_ctx->resync_async, | |
138559b9 | 825 | resync_req, &seq, &rcd_delta)) |
ed9b7646 | 826 | return; |
138559b9 | 827 | tls_bigint_subtract(rcd_sn, rcd_delta); |
ed9b7646 | 828 | break; |
f953d33b JK |
829 | } |
830 | ||
831 | tls_device_resync_rx(tls_ctx, sk, seq, rcd_sn); | |
832 | } | |
833 | ||
834 | static void tls_device_core_ctrl_rx_resync(struct tls_context *tls_ctx, | |
835 | struct tls_offload_context_rx *ctx, | |
836 | struct sock *sk, struct sk_buff *skb) | |
837 | { | |
838 | struct strp_msg *rxm; | |
839 | ||
840 | /* device will request resyncs by itself based on stream scan */ | |
841 | if (ctx->resync_type != TLS_OFFLOAD_SYNC_TYPE_CORE_NEXT_HINT) | |
842 | return; | |
843 | /* already scheduled */ | |
844 | if (ctx->resync_nh_do_now) | |
845 | return; | |
846 | /* seen decrypted fragments since last fully-failed record */ | |
847 | if (ctx->resync_nh_reset) { | |
848 | ctx->resync_nh_reset = 0; | |
849 | ctx->resync_nh.decrypted_failed = 1; | |
850 | ctx->resync_nh.decrypted_tgt = TLS_DEVICE_RESYNC_NH_START_IVAL; | |
851 | return; | |
852 | } | |
853 | ||
854 | if (++ctx->resync_nh.decrypted_failed <= ctx->resync_nh.decrypted_tgt) | |
855 | return; | |
856 | ||
857 | /* doing resync, bump the next target in case it fails */ | |
858 | if (ctx->resync_nh.decrypted_tgt < TLS_DEVICE_RESYNC_NH_MAX_IVAL) | |
859 | ctx->resync_nh.decrypted_tgt *= 2; | |
860 | else | |
861 | ctx->resync_nh.decrypted_tgt += TLS_DEVICE_RESYNC_NH_MAX_IVAL; | |
862 | ||
863 | rxm = strp_msg(skb); | |
864 | ||
865 | /* head of next rec is already in, parser will sync for us */ | |
866 | if (tcp_inq(sk) > rxm->full_len) { | |
8538d29c | 867 | trace_tls_device_rx_resync_nh_schedule(sk); |
f953d33b JK |
868 | ctx->resync_nh_do_now = 1; |
869 | } else { | |
870 | struct tls_prot_info *prot = &tls_ctx->prot_info; | |
871 | u8 rcd_sn[TLS_MAX_REC_SEQ_SIZE]; | |
872 | ||
873 | memcpy(rcd_sn, tls_ctx->rx.rec_seq, prot->rec_seq_size); | |
874 | tls_bigint_increment(rcd_sn, prot->rec_seq_size); | |
875 | ||
876 | tls_device_resync_rx(tls_ctx, sk, tcp_sk(sk)->copied_seq, | |
877 | rcd_sn); | |
878 | } | |
4799ac81 BP |
879 | } |
880 | ||
541cc48b | 881 | static int |
ea7a9d88 | 882 | tls_device_reencrypt(struct sock *sk, struct tls_context *tls_ctx) |
4799ac81 | 883 | { |
ea7a9d88 | 884 | struct tls_sw_context_rx *sw_ctx = tls_sw_ctx_rx(tls_ctx); |
8db44ab2 | 885 | const struct tls_cipher_desc *cipher_desc; |
8b3c59a7 JK |
886 | int err, offset, copy, data_len, pos; |
887 | struct sk_buff *skb, *skb_iter; | |
4799ac81 | 888 | struct scatterlist sg[1]; |
541cc48b | 889 | struct strp_msg *rxm; |
4799ac81 BP |
890 | char *orig_buf, *buf; |
891 | ||
8db44ab2 | 892 | cipher_desc = get_cipher_desc(tls_ctx->crypto_recv.info.cipher_type); |
8f1d532b | 893 | DEBUG_NET_WARN_ON_ONCE(!cipher_desc || !cipher_desc->offloadable); |
ea7a9d88 | 894 | |
8b3c59a7 | 895 | rxm = strp_msg(tls_strp_msg(sw_ctx)); |
8db44ab2 | 896 | orig_buf = kmalloc(rxm->full_len + TLS_HEADER_SIZE + cipher_desc->iv, |
ea7a9d88 | 897 | sk->sk_allocation); |
4799ac81 BP |
898 | if (!orig_buf) |
899 | return -ENOMEM; | |
900 | buf = orig_buf; | |
901 | ||
8b3c59a7 JK |
902 | err = tls_strp_msg_cow(sw_ctx); |
903 | if (unlikely(err)) | |
4799ac81 | 904 | goto free_buf; |
8b3c59a7 JK |
905 | |
906 | skb = tls_strp_msg(sw_ctx); | |
907 | rxm = strp_msg(skb); | |
908 | offset = rxm->offset; | |
4799ac81 BP |
909 | |
910 | sg_init_table(sg, 1); | |
911 | sg_set_buf(&sg[0], buf, | |
8db44ab2 SD |
912 | rxm->full_len + TLS_HEADER_SIZE + cipher_desc->iv); |
913 | err = skb_copy_bits(skb, offset, buf, TLS_HEADER_SIZE + cipher_desc->iv); | |
aeb11ff0 JK |
914 | if (err) |
915 | goto free_buf; | |
4799ac81 BP |
916 | |
917 | /* We are interested only in the decrypted data not the auth */ | |
541cc48b | 918 | err = decrypt_skb(sk, sg); |
4799ac81 BP |
919 | if (err != -EBADMSG) |
920 | goto free_buf; | |
921 | else | |
922 | err = 0; | |
923 | ||
8db44ab2 | 924 | data_len = rxm->full_len - cipher_desc->tag; |
4799ac81 | 925 | |
97e1caa5 | 926 | if (skb_pagelen(skb) > offset) { |
eb3d38d5 | 927 | copy = min_t(int, skb_pagelen(skb) - offset, data_len); |
4799ac81 | 928 | |
aeb11ff0 JK |
929 | if (skb->decrypted) { |
930 | err = skb_store_bits(skb, offset, buf, copy); | |
931 | if (err) | |
932 | goto free_buf; | |
933 | } | |
4799ac81 | 934 | |
97e1caa5 JK |
935 | offset += copy; |
936 | buf += copy; | |
937 | } | |
4799ac81 | 938 | |
eb3d38d5 | 939 | pos = skb_pagelen(skb); |
4799ac81 | 940 | skb_walk_frags(skb, skb_iter) { |
eb3d38d5 JK |
941 | int frag_pos; |
942 | ||
943 | /* Practically all frags must belong to msg if reencrypt | |
944 | * is needed with current strparser and coalescing logic, | |
945 | * but strparser may "get optimized", so let's be safe. | |
946 | */ | |
947 | if (pos + skb_iter->len <= offset) | |
948 | goto done_with_frag; | |
949 | if (pos >= data_len + rxm->offset) | |
950 | break; | |
951 | ||
952 | frag_pos = offset - pos; | |
953 | copy = min_t(int, skb_iter->len - frag_pos, | |
954 | data_len + rxm->offset - offset); | |
4799ac81 | 955 | |
aeb11ff0 JK |
956 | if (skb_iter->decrypted) { |
957 | err = skb_store_bits(skb_iter, frag_pos, buf, copy); | |
958 | if (err) | |
959 | goto free_buf; | |
960 | } | |
4799ac81 BP |
961 | |
962 | offset += copy; | |
963 | buf += copy; | |
eb3d38d5 JK |
964 | done_with_frag: |
965 | pos += skb_iter->len; | |
4799ac81 BP |
966 | } |
967 | ||
968 | free_buf: | |
969 | kfree(orig_buf); | |
970 | return err; | |
971 | } | |
972 | ||
541cc48b | 973 | int tls_device_decrypted(struct sock *sk, struct tls_context *tls_ctx) |
4799ac81 | 974 | { |
4799ac81 | 975 | struct tls_offload_context_rx *ctx = tls_offload_ctx_rx(tls_ctx); |
541cc48b JK |
976 | struct tls_sw_context_rx *sw_ctx = tls_sw_ctx_rx(tls_ctx); |
977 | struct sk_buff *skb = tls_strp_msg(sw_ctx); | |
978 | struct strp_msg *rxm = strp_msg(skb); | |
eca9bfaf JK |
979 | int is_decrypted, is_encrypted; |
980 | ||
981 | if (!tls_strp_msg_mixed_decrypted(sw_ctx)) { | |
982 | is_decrypted = skb->decrypted; | |
983 | is_encrypted = !is_decrypted; | |
984 | } else { | |
985 | is_decrypted = 0; | |
986 | is_encrypted = 0; | |
4799ac81 BP |
987 | } |
988 | ||
9ec1c6ac JK |
989 | trace_tls_device_decrypted(sk, tcp_sk(sk)->copied_seq - rxm->full_len, |
990 | tls_ctx->rx.rec_seq, rxm->full_len, | |
991 | is_encrypted, is_decrypted); | |
992 | ||
c55dcdd4 MM |
993 | if (unlikely(test_bit(TLS_RX_DEV_DEGRADED, &tls_ctx->flags))) { |
994 | if (likely(is_encrypted || is_decrypted)) | |
71471ca3 | 995 | return is_decrypted; |
c55dcdd4 MM |
996 | |
997 | /* After tls_device_down disables the offload, the next SKB will | |
998 | * likely have initial fragments decrypted, and final ones not | |
999 | * decrypted. We need to reencrypt that single SKB. | |
1000 | */ | |
ea7a9d88 | 1001 | return tls_device_reencrypt(sk, tls_ctx); |
c55dcdd4 MM |
1002 | } |
1003 | ||
f953d33b | 1004 | /* Return immediately if the record is either entirely plaintext or |
4799ac81 BP |
1005 | * entirely ciphertext. Otherwise handle reencrypt partially decrypted |
1006 | * record. | |
1007 | */ | |
f953d33b JK |
1008 | if (is_decrypted) { |
1009 | ctx->resync_nh_reset = 1; | |
71471ca3 | 1010 | return is_decrypted; |
f953d33b JK |
1011 | } |
1012 | if (is_encrypted) { | |
1013 | tls_device_core_ctrl_rx_resync(tls_ctx, ctx, sk, skb); | |
1014 | return 0; | |
1015 | } | |
1016 | ||
1017 | ctx->resync_nh_reset = 1; | |
ea7a9d88 | 1018 | return tls_device_reencrypt(sk, tls_ctx); |
4799ac81 BP |
1019 | } |
1020 | ||
9e995797 JK |
1021 | static void tls_device_attach(struct tls_context *ctx, struct sock *sk, |
1022 | struct net_device *netdev) | |
1023 | { | |
1024 | if (sk->sk_destruct != tls_device_sk_destruct) { | |
1025 | refcount_set(&ctx->refcount, 1); | |
1026 | dev_hold(netdev); | |
94ce3b64 | 1027 | RCU_INIT_POINTER(ctx->netdev, netdev); |
9e995797 JK |
1028 | spin_lock_irq(&tls_device_lock); |
1029 | list_add_tail(&ctx->list, &tls_device_list); | |
1030 | spin_unlock_irq(&tls_device_lock); | |
1031 | ||
1032 | ctx->sk_destruct = sk->sk_destruct; | |
8d5a49e9 | 1033 | smp_store_release(&sk->sk_destruct, tls_device_sk_destruct); |
9e995797 JK |
1034 | } |
1035 | } | |
1036 | ||
01374079 SD |
1037 | static struct tls_offload_context_tx *alloc_offload_ctx_tx(struct tls_context *ctx) |
1038 | { | |
1039 | struct tls_offload_context_tx *offload_ctx; | |
1040 | __be64 rcd_sn; | |
1041 | ||
9f0c8245 | 1042 | offload_ctx = kzalloc(sizeof(*offload_ctx), GFP_KERNEL); |
01374079 SD |
1043 | if (!offload_ctx) |
1044 | return NULL; | |
1045 | ||
1046 | INIT_WORK(&offload_ctx->destruct_work, tls_device_tx_del_task); | |
1047 | INIT_LIST_HEAD(&offload_ctx->records_list); | |
1048 | spin_lock_init(&offload_ctx->lock); | |
1049 | sg_init_table(offload_ctx->sg_tx_data, | |
1050 | ARRAY_SIZE(offload_ctx->sg_tx_data)); | |
1051 | ||
1052 | /* start at rec_seq - 1 to account for the start marker record */ | |
1053 | memcpy(&rcd_sn, ctx->tx.rec_seq, sizeof(rcd_sn)); | |
1054 | offload_ctx->unacked_record_sn = be64_to_cpu(rcd_sn) - 1; | |
1055 | ||
1056 | offload_ctx->ctx = ctx; | |
1057 | ||
1058 | return offload_ctx; | |
1059 | } | |
1060 | ||
4f486699 | 1061 | int tls_set_device_offload(struct sock *sk) |
e8f69799 | 1062 | { |
e8f69799 | 1063 | struct tls_record_info *start_marker_record; |
d80a1b9d | 1064 | struct tls_offload_context_tx *offload_ctx; |
4f486699 | 1065 | const struct tls_cipher_desc *cipher_desc; |
e8f69799 | 1066 | struct tls_crypto_info *crypto_info; |
4f486699 | 1067 | struct tls_prot_info *prot; |
e8f69799 | 1068 | struct net_device *netdev; |
4f486699 | 1069 | struct tls_context *ctx; |
e8f69799 | 1070 | struct sk_buff *skb; |
4f486699 | 1071 | char *iv, *rec_seq; |
90962b48 | 1072 | int rc; |
e8f69799 | 1073 | |
4f486699 SD |
1074 | ctx = tls_get_ctx(sk); |
1075 | prot = &ctx->prot_info; | |
e8f69799 | 1076 | |
90962b48 JK |
1077 | if (ctx->priv_ctx_tx) |
1078 | return -EEXIST; | |
e8f69799 | 1079 | |
b1a6f56b ZX |
1080 | netdev = get_netdev_for_sock(sk); |
1081 | if (!netdev) { | |
1082 | pr_err_ratelimited("%s: netdev not found\n", __func__); | |
1083 | return -EINVAL; | |
1084 | } | |
e8f69799 | 1085 | |
b1a6f56b ZX |
1086 | if (!(netdev->features & NETIF_F_HW_TLS_TX)) { |
1087 | rc = -EOPNOTSUPP; | |
1088 | goto release_netdev; | |
e8f69799 IL |
1089 | } |
1090 | ||
86029d10 | 1091 | crypto_info = &ctx->crypto_send.info; |
618bac45 JK |
1092 | if (crypto_info->version != TLS_1_2_VERSION) { |
1093 | rc = -EOPNOTSUPP; | |
b1a6f56b | 1094 | goto release_netdev; |
618bac45 JK |
1095 | } |
1096 | ||
8db44ab2 | 1097 | cipher_desc = get_cipher_desc(crypto_info->cipher_type); |
3524dd4d | 1098 | if (!cipher_desc || !cipher_desc->offloadable) { |
89fec474 | 1099 | rc = -EINVAL; |
b1a6f56b | 1100 | goto release_netdev; |
89fec474 JK |
1101 | } |
1102 | ||
b7c4f573 | 1103 | rc = init_prot_info(prot, crypto_info, cipher_desc); |
1a074f76 SD |
1104 | if (rc) |
1105 | goto release_netdev; | |
1106 | ||
3524dd4d SD |
1107 | iv = crypto_info_iv(crypto_info, cipher_desc); |
1108 | rec_seq = crypto_info_rec_seq(crypto_info, cipher_desc); | |
1109 | ||
8db44ab2 | 1110 | memcpy(ctx->tx.iv + cipher_desc->salt, iv, cipher_desc->iv); |
6d5029e5 | 1111 | memcpy(ctx->tx.rec_seq, rec_seq, cipher_desc->rec_seq); |
e8f69799 | 1112 | |
b1a6f56b ZX |
1113 | start_marker_record = kmalloc(sizeof(*start_marker_record), GFP_KERNEL); |
1114 | if (!start_marker_record) { | |
1115 | rc = -ENOMEM; | |
1c1cb311 | 1116 | goto release_netdev; |
b1a6f56b ZX |
1117 | } |
1118 | ||
01374079 | 1119 | offload_ctx = alloc_offload_ctx_tx(ctx); |
b1a6f56b ZX |
1120 | if (!offload_ctx) { |
1121 | rc = -ENOMEM; | |
1122 | goto free_marker_record; | |
1123 | } | |
1124 | ||
e8f69799 IL |
1125 | rc = tls_sw_fallback_init(sk, offload_ctx, crypto_info); |
1126 | if (rc) | |
b1a6f56b | 1127 | goto free_offload_ctx; |
e8f69799 | 1128 | |
e8f69799 IL |
1129 | start_marker_record->end_seq = tcp_sk(sk)->write_seq; |
1130 | start_marker_record->len = 0; | |
1131 | start_marker_record->num_frags = 0; | |
e8f69799 | 1132 | list_add_tail(&start_marker_record->list, &offload_ctx->records_list); |
e8f69799 IL |
1133 | |
1134 | clean_acked_data_enable(inet_csk(sk), &tls_icsk_clean_acked); | |
1135 | ctx->push_pending_record = tls_device_push_pending_record; | |
e8f69799 IL |
1136 | |
1137 | /* TLS offload is greatly simplified if we don't send | |
1138 | * SKBs where only part of the payload needs to be encrypted. | |
1139 | * So mark the last skb in the write queue as end of record. | |
1140 | */ | |
1141 | skb = tcp_write_queue_tail(sk); | |
1142 | if (skb) | |
1143 | TCP_SKB_CB(skb)->eor = 1; | |
1144 | ||
e8f69799 IL |
1145 | /* Avoid offloading if the device is down |
1146 | * We don't want to offload new flows after | |
1147 | * the NETDEV_DOWN event | |
3544c98a JK |
1148 | * |
1149 | * device_offload_lock is taken in tls_devices's NETDEV_DOWN | |
1150 | * handler thus protecting from the device going down before | |
1151 | * ctx was added to tls_device_list. | |
e8f69799 | 1152 | */ |
3544c98a | 1153 | down_read(&device_offload_lock); |
e8f69799 IL |
1154 | if (!(netdev->flags & IFF_UP)) { |
1155 | rc = -EINVAL; | |
3544c98a | 1156 | goto release_lock; |
e8f69799 IL |
1157 | } |
1158 | ||
1159 | ctx->priv_ctx_tx = offload_ctx; | |
1160 | rc = netdev->tlsdev_ops->tls_dev_add(netdev, sk, TLS_OFFLOAD_CTX_DIR_TX, | |
86029d10 | 1161 | &ctx->crypto_send.info, |
e8f69799 | 1162 | tcp_sk(sk)->write_seq); |
8538d29c JK |
1163 | trace_tls_device_offload_set(sk, TLS_OFFLOAD_CTX_DIR_TX, |
1164 | tcp_sk(sk)->write_seq, rec_seq, rc); | |
e8f69799 | 1165 | if (rc) |
3544c98a | 1166 | goto release_lock; |
e8f69799 | 1167 | |
4799ac81 | 1168 | tls_device_attach(ctx, sk, netdev); |
3544c98a | 1169 | up_read(&device_offload_lock); |
e8f69799 | 1170 | |
ed3c9a2f | 1171 | /* following this assignment tls_is_skb_tx_device_offloaded |
e8f69799 IL |
1172 | * will return true and the context might be accessed |
1173 | * by the netdev's xmit function. | |
1174 | */ | |
4799ac81 BP |
1175 | smp_store_release(&sk->sk_validate_xmit_skb, tls_validate_xmit_skb); |
1176 | dev_put(netdev); | |
90962b48 JK |
1177 | |
1178 | return 0; | |
e8f69799 | 1179 | |
e8f69799 IL |
1180 | release_lock: |
1181 | up_read(&device_offload_lock); | |
1182 | clean_acked_data_disable(inet_csk(sk)); | |
1183 | crypto_free_aead(offload_ctx->aead_send); | |
e8f69799 IL |
1184 | free_offload_ctx: |
1185 | kfree(offload_ctx); | |
1186 | ctx->priv_ctx_tx = NULL; | |
1187 | free_marker_record: | |
1188 | kfree(start_marker_record); | |
b1a6f56b ZX |
1189 | release_netdev: |
1190 | dev_put(netdev); | |
e8f69799 IL |
1191 | return rc; |
1192 | } | |
1193 | ||
4799ac81 BP |
1194 | int tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx) |
1195 | { | |
8538d29c | 1196 | struct tls12_crypto_info_aes_gcm_128 *info; |
4799ac81 BP |
1197 | struct tls_offload_context_rx *context; |
1198 | struct net_device *netdev; | |
1199 | int rc = 0; | |
1200 | ||
618bac45 JK |
1201 | if (ctx->crypto_recv.info.version != TLS_1_2_VERSION) |
1202 | return -EOPNOTSUPP; | |
1203 | ||
4799ac81 BP |
1204 | netdev = get_netdev_for_sock(sk); |
1205 | if (!netdev) { | |
1206 | pr_err_ratelimited("%s: netdev not found\n", __func__); | |
3544c98a | 1207 | return -EINVAL; |
4799ac81 BP |
1208 | } |
1209 | ||
1210 | if (!(netdev->features & NETIF_F_HW_TLS_RX)) { | |
4a5cdc60 | 1211 | rc = -EOPNOTSUPP; |
4799ac81 BP |
1212 | goto release_netdev; |
1213 | } | |
1214 | ||
1215 | /* Avoid offloading if the device is down | |
1216 | * We don't want to offload new flows after | |
1217 | * the NETDEV_DOWN event | |
3544c98a JK |
1218 | * |
1219 | * device_offload_lock is taken in tls_devices's NETDEV_DOWN | |
1220 | * handler thus protecting from the device going down before | |
1221 | * ctx was added to tls_device_list. | |
4799ac81 | 1222 | */ |
3544c98a | 1223 | down_read(&device_offload_lock); |
4799ac81 BP |
1224 | if (!(netdev->flags & IFF_UP)) { |
1225 | rc = -EINVAL; | |
3544c98a | 1226 | goto release_lock; |
4799ac81 BP |
1227 | } |
1228 | ||
9f0c8245 | 1229 | context = kzalloc(sizeof(*context), GFP_KERNEL); |
4799ac81 BP |
1230 | if (!context) { |
1231 | rc = -ENOMEM; | |
3544c98a | 1232 | goto release_lock; |
4799ac81 | 1233 | } |
f953d33b | 1234 | context->resync_nh_reset = 1; |
4799ac81 BP |
1235 | |
1236 | ctx->priv_ctx_rx = context; | |
b6a30ec9 | 1237 | rc = tls_set_sw_offload(sk, 0); |
4799ac81 BP |
1238 | if (rc) |
1239 | goto release_ctx; | |
1240 | ||
1241 | rc = netdev->tlsdev_ops->tls_dev_add(netdev, sk, TLS_OFFLOAD_CTX_DIR_RX, | |
86029d10 | 1242 | &ctx->crypto_recv.info, |
4799ac81 | 1243 | tcp_sk(sk)->copied_seq); |
8538d29c JK |
1244 | info = (void *)&ctx->crypto_recv.info; |
1245 | trace_tls_device_offload_set(sk, TLS_OFFLOAD_CTX_DIR_RX, | |
1246 | tcp_sk(sk)->copied_seq, info->rec_seq, rc); | |
e49d268d | 1247 | if (rc) |
4799ac81 | 1248 | goto free_sw_resources; |
4799ac81 BP |
1249 | |
1250 | tls_device_attach(ctx, sk, netdev); | |
90962b48 JK |
1251 | up_read(&device_offload_lock); |
1252 | ||
1253 | dev_put(netdev); | |
1254 | ||
1255 | return 0; | |
4799ac81 BP |
1256 | |
1257 | free_sw_resources: | |
62ef81d5 | 1258 | up_read(&device_offload_lock); |
4799ac81 | 1259 | tls_sw_free_resources_rx(sk); |
62ef81d5 | 1260 | down_read(&device_offload_lock); |
4799ac81 BP |
1261 | release_ctx: |
1262 | ctx->priv_ctx_rx = NULL; | |
4799ac81 BP |
1263 | release_lock: |
1264 | up_read(&device_offload_lock); | |
3544c98a JK |
1265 | release_netdev: |
1266 | dev_put(netdev); | |
4799ac81 BP |
1267 | return rc; |
1268 | } | |
1269 | ||
1270 | void tls_device_offload_cleanup_rx(struct sock *sk) | |
1271 | { | |
1272 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
1273 | struct net_device *netdev; | |
1274 | ||
1275 | down_read(&device_offload_lock); | |
94ce3b64 MM |
1276 | netdev = rcu_dereference_protected(tls_ctx->netdev, |
1277 | lockdep_is_held(&device_offload_lock)); | |
4799ac81 BP |
1278 | if (!netdev) |
1279 | goto out; | |
1280 | ||
4799ac81 BP |
1281 | netdev->tlsdev_ops->tls_dev_del(netdev, tls_ctx, |
1282 | TLS_OFFLOAD_CTX_DIR_RX); | |
1283 | ||
1284 | if (tls_ctx->tx_conf != TLS_HW) { | |
1285 | dev_put(netdev); | |
94ce3b64 | 1286 | rcu_assign_pointer(tls_ctx->netdev, NULL); |
025cc2fb MM |
1287 | } else { |
1288 | set_bit(TLS_RX_DEV_CLOSED, &tls_ctx->flags); | |
4799ac81 BP |
1289 | } |
1290 | out: | |
1291 | up_read(&device_offload_lock); | |
4799ac81 BP |
1292 | tls_sw_release_resources_rx(sk); |
1293 | } | |
1294 | ||
e8f69799 IL |
1295 | static int tls_device_down(struct net_device *netdev) |
1296 | { | |
1297 | struct tls_context *ctx, *tmp; | |
1298 | unsigned long flags; | |
1299 | LIST_HEAD(list); | |
1300 | ||
1301 | /* Request a write lock to block new offload attempts */ | |
1302 | down_write(&device_offload_lock); | |
1303 | ||
1304 | spin_lock_irqsave(&tls_device_lock, flags); | |
1305 | list_for_each_entry_safe(ctx, tmp, &tls_device_list, list) { | |
94ce3b64 MM |
1306 | struct net_device *ctx_netdev = |
1307 | rcu_dereference_protected(ctx->netdev, | |
1308 | lockdep_is_held(&device_offload_lock)); | |
1309 | ||
1310 | if (ctx_netdev != netdev || | |
e8f69799 IL |
1311 | !refcount_inc_not_zero(&ctx->refcount)) |
1312 | continue; | |
1313 | ||
1314 | list_move(&ctx->list, &list); | |
1315 | } | |
1316 | spin_unlock_irqrestore(&tls_device_lock, flags); | |
1317 | ||
1318 | list_for_each_entry_safe(ctx, tmp, &list, list) { | |
c55dcdd4 | 1319 | /* Stop offloaded TX and switch to the fallback. |
ed3c9a2f | 1320 | * tls_is_skb_tx_device_offloaded will return false. |
c55dcdd4 MM |
1321 | */ |
1322 | WRITE_ONCE(ctx->sk->sk_validate_xmit_skb, tls_validate_xmit_skb_sw); | |
1323 | ||
1324 | /* Stop the RX and TX resync. | |
1325 | * tls_dev_resync must not be called after tls_dev_del. | |
1326 | */ | |
94ce3b64 | 1327 | rcu_assign_pointer(ctx->netdev, NULL); |
c55dcdd4 MM |
1328 | |
1329 | /* Start skipping the RX resync logic completely. */ | |
1330 | set_bit(TLS_RX_DEV_DEGRADED, &ctx->flags); | |
1331 | ||
1332 | /* Sync with inflight packets. After this point: | |
1333 | * TX: no non-encrypted packets will be passed to the driver. | |
1334 | * RX: resync requests from the driver will be ignored. | |
1335 | */ | |
1336 | synchronize_net(); | |
1337 | ||
1338 | /* Release the offload context on the driver side. */ | |
4799ac81 BP |
1339 | if (ctx->tx_conf == TLS_HW) |
1340 | netdev->tlsdev_ops->tls_dev_del(netdev, ctx, | |
1341 | TLS_OFFLOAD_CTX_DIR_TX); | |
025cc2fb MM |
1342 | if (ctx->rx_conf == TLS_HW && |
1343 | !test_bit(TLS_RX_DEV_CLOSED, &ctx->flags)) | |
4799ac81 BP |
1344 | netdev->tlsdev_ops->tls_dev_del(netdev, ctx, |
1345 | TLS_OFFLOAD_CTX_DIR_RX); | |
c55dcdd4 | 1346 | |
e8f69799 | 1347 | dev_put(netdev); |
e8f69799 | 1348 | |
c55dcdd4 MM |
1349 | /* Move the context to a separate list for two reasons: |
1350 | * 1. When the context is deallocated, list_del is called. | |
1351 | * 2. It's no longer an offloaded context, so we don't want to | |
1352 | * run offload-specific code on this context. | |
1353 | */ | |
1354 | spin_lock_irqsave(&tls_device_lock, flags); | |
1355 | list_move_tail(&ctx->list, &tls_device_down_list); | |
1356 | spin_unlock_irqrestore(&tls_device_lock, flags); | |
1357 | ||
1358 | /* Device contexts for RX and TX will be freed in on sk_destruct | |
1359 | * by tls_device_free_ctx. rx_conf and tx_conf stay in TLS_HW. | |
3740651b | 1360 | * Now release the ref taken above. |
c55dcdd4 | 1361 | */ |
f6336724 MM |
1362 | if (refcount_dec_and_test(&ctx->refcount)) { |
1363 | /* sk_destruct ran after tls_device_down took a ref, and | |
1364 | * it returned early. Complete the destruction here. | |
1365 | */ | |
1366 | list_del(&ctx->list); | |
3740651b | 1367 | tls_device_free_ctx(ctx); |
f6336724 | 1368 | } |
e8f69799 IL |
1369 | } |
1370 | ||
1371 | up_write(&device_offload_lock); | |
1372 | ||
7adc91e0 | 1373 | flush_workqueue(destruct_wq); |
e8f69799 IL |
1374 | |
1375 | return NOTIFY_DONE; | |
1376 | } | |
1377 | ||
1378 | static int tls_dev_event(struct notifier_block *this, unsigned long event, | |
1379 | void *ptr) | |
1380 | { | |
1381 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
1382 | ||
c3f4a6c3 JK |
1383 | if (!dev->tlsdev_ops && |
1384 | !(dev->features & (NETIF_F_HW_TLS_RX | NETIF_F_HW_TLS_TX))) | |
e8f69799 IL |
1385 | return NOTIFY_DONE; |
1386 | ||
1387 | switch (event) { | |
1388 | case NETDEV_REGISTER: | |
1389 | case NETDEV_FEAT_CHANGE: | |
4e5a7332 TT |
1390 | if (netif_is_bond_master(dev)) |
1391 | return NOTIFY_DONE; | |
4799ac81 | 1392 | if ((dev->features & NETIF_F_HW_TLS_RX) && |
eeb2efaf | 1393 | !dev->tlsdev_ops->tls_dev_resync) |
4799ac81 BP |
1394 | return NOTIFY_BAD; |
1395 | ||
e8f69799 IL |
1396 | if (dev->tlsdev_ops && |
1397 | dev->tlsdev_ops->tls_dev_add && | |
1398 | dev->tlsdev_ops->tls_dev_del) | |
1399 | return NOTIFY_DONE; | |
1400 | else | |
1401 | return NOTIFY_BAD; | |
1402 | case NETDEV_DOWN: | |
1403 | return tls_device_down(dev); | |
1404 | } | |
1405 | return NOTIFY_DONE; | |
1406 | } | |
1407 | ||
1408 | static struct notifier_block tls_dev_notifier = { | |
1409 | .notifier_call = tls_dev_event, | |
1410 | }; | |
1411 | ||
3d8c51b2 | 1412 | int __init tls_device_init(void) |
e8f69799 | 1413 | { |
7adc91e0 TT |
1414 | int err; |
1415 | ||
6b47808f JK |
1416 | dummy_page = alloc_page(GFP_KERNEL); |
1417 | if (!dummy_page) | |
7adc91e0 TT |
1418 | return -ENOMEM; |
1419 | ||
6b47808f JK |
1420 | destruct_wq = alloc_workqueue("ktls_device_destruct", 0, 0); |
1421 | if (!destruct_wq) { | |
1422 | err = -ENOMEM; | |
1423 | goto err_free_dummy; | |
1424 | } | |
1425 | ||
7adc91e0 TT |
1426 | err = register_netdevice_notifier(&tls_dev_notifier); |
1427 | if (err) | |
6b47808f | 1428 | goto err_destroy_wq; |
7adc91e0 | 1429 | |
6b47808f JK |
1430 | return 0; |
1431 | ||
1432 | err_destroy_wq: | |
1433 | destroy_workqueue(destruct_wq); | |
1434 | err_free_dummy: | |
1435 | put_page(dummy_page); | |
7adc91e0 | 1436 | return err; |
e8f69799 IL |
1437 | } |
1438 | ||
1439 | void __exit tls_device_cleanup(void) | |
1440 | { | |
1441 | unregister_netdevice_notifier(&tls_dev_notifier); | |
7adc91e0 | 1442 | destroy_workqueue(destruct_wq); |
494bc1d2 | 1443 | clean_acked_data_flush(); |
6b47808f | 1444 | put_page(dummy_page); |
e8f69799 | 1445 | } |