Commit | Line | Data |
---|---|---|
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> | |
40 | ||
58790314 | 41 | #include "tls.h" |
8538d29c JK |
42 | #include "trace.h" |
43 | ||
e8f69799 IL |
44 | /* device_offload_lock is used to synchronize tls_dev_add |
45 | * against NETDEV_DOWN notifications. | |
46 | */ | |
47 | static DECLARE_RWSEM(device_offload_lock); | |
48 | ||
7adc91e0 | 49 | static struct workqueue_struct *destruct_wq __read_mostly; |
e8f69799 | 50 | |
e8f69799 | 51 | static LIST_HEAD(tls_device_list); |
c55dcdd4 | 52 | static LIST_HEAD(tls_device_down_list); |
e8f69799 IL |
53 | static DEFINE_SPINLOCK(tls_device_lock); |
54 | ||
6b47808f JK |
55 | static struct page *dummy_page; |
56 | ||
e8f69799 IL |
57 | static void tls_device_free_ctx(struct tls_context *ctx) |
58 | { | |
5a03bc73 | 59 | if (ctx->tx_conf == TLS_HW) { |
4799ac81 | 60 | kfree(tls_offload_ctx_tx(ctx)); |
5a03bc73 JK |
61 | kfree(ctx->tx.rec_seq); |
62 | kfree(ctx->tx.iv); | |
63 | } | |
4799ac81 BP |
64 | |
65 | if (ctx->rx_conf == TLS_HW) | |
66 | kfree(tls_offload_ctx_rx(ctx)); | |
e8f69799 | 67 | |
15a7dea7 | 68 | tls_ctx_free(NULL, ctx); |
e8f69799 IL |
69 | } |
70 | ||
7adc91e0 | 71 | static void tls_device_tx_del_task(struct work_struct *work) |
e8f69799 | 72 | { |
7adc91e0 TT |
73 | struct tls_offload_context_tx *offload_ctx = |
74 | container_of(work, struct tls_offload_context_tx, destruct_work); | |
75 | struct tls_context *ctx = offload_ctx->ctx; | |
94ce3b64 MM |
76 | struct net_device *netdev; |
77 | ||
78 | /* Safe, because this is the destroy flow, refcount is 0, so | |
79 | * tls_device_down can't store this field in parallel. | |
80 | */ | |
81 | netdev = rcu_dereference_protected(ctx->netdev, | |
82 | !refcount_read(&ctx->refcount)); | |
e8f69799 | 83 | |
7adc91e0 TT |
84 | netdev->tlsdev_ops->tls_dev_del(netdev, ctx, TLS_OFFLOAD_CTX_DIR_TX); |
85 | dev_put(netdev); | |
86 | ctx->netdev = NULL; | |
87 | tls_device_free_ctx(ctx); | |
e8f69799 IL |
88 | } |
89 | ||
90 | static void tls_device_queue_ctx_destruction(struct tls_context *ctx) | |
91 | { | |
94ce3b64 | 92 | struct net_device *netdev; |
e8f69799 | 93 | unsigned long flags; |
113671b2 | 94 | bool async_cleanup; |
e8f69799 IL |
95 | |
96 | spin_lock_irqsave(&tls_device_lock, flags); | |
113671b2 TT |
97 | if (unlikely(!refcount_dec_and_test(&ctx->refcount))) { |
98 | spin_unlock_irqrestore(&tls_device_lock, flags); | |
99 | return; | |
100 | } | |
f08d8c1b | 101 | |
7adc91e0 | 102 | list_del(&ctx->list); /* Remove from tls_device_list / tls_device_down_list */ |
94ce3b64 MM |
103 | |
104 | /* Safe, because this is the destroy flow, refcount is 0, so | |
105 | * tls_device_down can't store this field in parallel. | |
106 | */ | |
107 | netdev = rcu_dereference_protected(ctx->netdev, | |
108 | !refcount_read(&ctx->refcount)); | |
109 | ||
110 | async_cleanup = netdev && ctx->tx_conf == TLS_HW; | |
113671b2 | 111 | if (async_cleanup) { |
7adc91e0 | 112 | struct tls_offload_context_tx *offload_ctx = tls_offload_ctx_tx(ctx); |
e8f69799 | 113 | |
7adc91e0 | 114 | /* queue_work inside the spinlock |
113671b2 TT |
115 | * to make sure tls_device_down waits for that work. |
116 | */ | |
7adc91e0 | 117 | queue_work(destruct_wq, &offload_ctx->destruct_work); |
113671b2 | 118 | } |
e8f69799 | 119 | spin_unlock_irqrestore(&tls_device_lock, flags); |
113671b2 TT |
120 | |
121 | if (!async_cleanup) | |
122 | tls_device_free_ctx(ctx); | |
e8f69799 IL |
123 | } |
124 | ||
125 | /* We assume that the socket is already connected */ | |
126 | static struct net_device *get_netdev_for_sock(struct sock *sk) | |
127 | { | |
128 | struct dst_entry *dst = sk_dst_get(sk); | |
129 | struct net_device *netdev = NULL; | |
130 | ||
131 | if (likely(dst)) { | |
153cbd13 | 132 | netdev = netdev_sk_get_lowest_dev(dst->dev, sk); |
e8f69799 IL |
133 | dev_hold(netdev); |
134 | } | |
135 | ||
136 | dst_release(dst); | |
137 | ||
138 | return netdev; | |
139 | } | |
140 | ||
141 | static void destroy_record(struct tls_record_info *record) | |
142 | { | |
7ccd4519 | 143 | int i; |
e8f69799 | 144 | |
7ccd4519 | 145 | for (i = 0; i < record->num_frags; i++) |
c420c989 | 146 | __skb_frag_unref(&record->frags[i], false); |
e8f69799 IL |
147 | kfree(record); |
148 | } | |
149 | ||
d80a1b9d | 150 | static void delete_all_records(struct tls_offload_context_tx *offload_ctx) |
e8f69799 IL |
151 | { |
152 | struct tls_record_info *info, *temp; | |
153 | ||
154 | list_for_each_entry_safe(info, temp, &offload_ctx->records_list, list) { | |
155 | list_del(&info->list); | |
156 | destroy_record(info); | |
157 | } | |
158 | ||
159 | offload_ctx->retransmit_hint = NULL; | |
160 | } | |
161 | ||
162 | static void tls_icsk_clean_acked(struct sock *sk, u32 acked_seq) | |
163 | { | |
164 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
165 | struct tls_record_info *info, *temp; | |
d80a1b9d | 166 | struct tls_offload_context_tx *ctx; |
e8f69799 IL |
167 | u64 deleted_records = 0; |
168 | unsigned long flags; | |
169 | ||
170 | if (!tls_ctx) | |
171 | return; | |
172 | ||
d80a1b9d | 173 | ctx = tls_offload_ctx_tx(tls_ctx); |
e8f69799 IL |
174 | |
175 | spin_lock_irqsave(&ctx->lock, flags); | |
176 | info = ctx->retransmit_hint; | |
6e3d02b6 | 177 | if (info && !before(acked_seq, info->end_seq)) |
e8f69799 | 178 | ctx->retransmit_hint = NULL; |
e8f69799 IL |
179 | |
180 | list_for_each_entry_safe(info, temp, &ctx->records_list, list) { | |
181 | if (before(acked_seq, info->end_seq)) | |
182 | break; | |
183 | list_del(&info->list); | |
184 | ||
185 | destroy_record(info); | |
186 | deleted_records++; | |
187 | } | |
188 | ||
189 | ctx->unacked_record_sn += deleted_records; | |
190 | spin_unlock_irqrestore(&ctx->lock, flags); | |
191 | } | |
192 | ||
193 | /* At this point, there should be no references on this | |
194 | * socket and no in-flight SKBs associated with this | |
195 | * socket, so it is safe to free all the resources. | |
196 | */ | |
8d5a49e9 | 197 | void tls_device_sk_destruct(struct sock *sk) |
e8f69799 IL |
198 | { |
199 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
d80a1b9d | 200 | struct tls_offload_context_tx *ctx = tls_offload_ctx_tx(tls_ctx); |
e8f69799 | 201 | |
4799ac81 | 202 | tls_ctx->sk_destruct(sk); |
e8f69799 | 203 | |
4799ac81 BP |
204 | if (tls_ctx->tx_conf == TLS_HW) { |
205 | if (ctx->open_record) | |
206 | destroy_record(ctx->open_record); | |
207 | delete_all_records(ctx); | |
208 | crypto_free_aead(ctx->aead_send); | |
209 | clean_acked_data_disable(inet_csk(sk)); | |
210 | } | |
e8f69799 | 211 | |
f08d8c1b | 212 | tls_device_queue_ctx_destruction(tls_ctx); |
e8f69799 | 213 | } |
8d5a49e9 | 214 | EXPORT_SYMBOL_GPL(tls_device_sk_destruct); |
e8f69799 | 215 | |
35b71a34 JK |
216 | void tls_device_free_resources_tx(struct sock *sk) |
217 | { | |
218 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
219 | ||
220 | tls_free_partial_record(sk, tls_ctx); | |
221 | } | |
222 | ||
8538d29c JK |
223 | void tls_offload_tx_resync_request(struct sock *sk, u32 got_seq, u32 exp_seq) |
224 | { | |
225 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
226 | ||
227 | trace_tls_device_tx_resync_req(sk, got_seq, exp_seq); | |
228 | WARN_ON(test_and_set_bit(TLS_TX_SYNC_SCHED, &tls_ctx->flags)); | |
229 | } | |
230 | EXPORT_SYMBOL_GPL(tls_offload_tx_resync_request); | |
231 | ||
50180074 JK |
232 | static void tls_device_resync_tx(struct sock *sk, struct tls_context *tls_ctx, |
233 | u32 seq) | |
234 | { | |
235 | struct net_device *netdev; | |
236 | struct sk_buff *skb; | |
b5d9a834 | 237 | int err = 0; |
50180074 JK |
238 | u8 *rcd_sn; |
239 | ||
240 | skb = tcp_write_queue_tail(sk); | |
241 | if (skb) | |
242 | TCP_SKB_CB(skb)->eor = 1; | |
243 | ||
244 | rcd_sn = tls_ctx->tx.rec_seq; | |
245 | ||
8538d29c | 246 | trace_tls_device_tx_resync_send(sk, seq, rcd_sn); |
50180074 | 247 | down_read(&device_offload_lock); |
94ce3b64 MM |
248 | netdev = rcu_dereference_protected(tls_ctx->netdev, |
249 | lockdep_is_held(&device_offload_lock)); | |
50180074 | 250 | if (netdev) |
b5d9a834 DM |
251 | err = netdev->tlsdev_ops->tls_dev_resync(netdev, sk, seq, |
252 | rcd_sn, | |
253 | TLS_OFFLOAD_CTX_DIR_TX); | |
50180074 | 254 | up_read(&device_offload_lock); |
b5d9a834 DM |
255 | if (err) |
256 | return; | |
50180074 JK |
257 | |
258 | clear_bit_unlock(TLS_TX_SYNC_SCHED, &tls_ctx->flags); | |
259 | } | |
260 | ||
e8f69799 IL |
261 | static void tls_append_frag(struct tls_record_info *record, |
262 | struct page_frag *pfrag, | |
263 | int size) | |
264 | { | |
265 | skb_frag_t *frag; | |
266 | ||
267 | frag = &record->frags[record->num_frags - 1]; | |
d8e18a51 | 268 | if (skb_frag_page(frag) == pfrag->page && |
b54c9d5b | 269 | skb_frag_off(frag) + skb_frag_size(frag) == pfrag->offset) { |
d8e18a51 | 270 | skb_frag_size_add(frag, size); |
e8f69799 IL |
271 | } else { |
272 | ++frag; | |
b51f4113 YL |
273 | skb_frag_fill_page_desc(frag, pfrag->page, pfrag->offset, |
274 | size); | |
e8f69799 IL |
275 | ++record->num_frags; |
276 | get_page(pfrag->page); | |
277 | } | |
278 | ||
279 | pfrag->offset += size; | |
280 | record->len += size; | |
281 | } | |
282 | ||
283 | static int tls_push_record(struct sock *sk, | |
284 | struct tls_context *ctx, | |
d80a1b9d | 285 | struct tls_offload_context_tx *offload_ctx, |
e8f69799 | 286 | struct tls_record_info *record, |
e7b159a4 | 287 | int flags) |
e8f69799 | 288 | { |
4509de14 | 289 | struct tls_prot_info *prot = &ctx->prot_info; |
e8f69799 | 290 | struct tcp_sock *tp = tcp_sk(sk); |
e8f69799 IL |
291 | skb_frag_t *frag; |
292 | int i; | |
293 | ||
e8f69799 | 294 | record->end_seq = tp->write_seq + record->len; |
d4774ac0 | 295 | list_add_tail_rcu(&record->list, &offload_ctx->records_list); |
e8f69799 | 296 | offload_ctx->open_record = NULL; |
50180074 JK |
297 | |
298 | if (test_bit(TLS_TX_SYNC_SCHED, &ctx->flags)) | |
299 | tls_device_resync_tx(sk, ctx, tp->write_seq); | |
300 | ||
fb0f886f | 301 | tls_advance_record_sn(sk, prot, &ctx->tx); |
e8f69799 IL |
302 | |
303 | for (i = 0; i < record->num_frags; i++) { | |
304 | frag = &record->frags[i]; | |
305 | sg_unmark_end(&offload_ctx->sg_tx_data[i]); | |
306 | sg_set_page(&offload_ctx->sg_tx_data[i], skb_frag_page(frag), | |
b54c9d5b | 307 | skb_frag_size(frag), skb_frag_off(frag)); |
d8e18a51 | 308 | sk_mem_charge(sk, skb_frag_size(frag)); |
e8f69799 IL |
309 | get_page(skb_frag_page(frag)); |
310 | } | |
311 | sg_mark_end(&offload_ctx->sg_tx_data[record->num_frags - 1]); | |
312 | ||
313 | /* all ready, send */ | |
314 | return tls_push_sg(sk, ctx, offload_ctx->sg_tx_data, 0, flags); | |
315 | } | |
316 | ||
6b47808f JK |
317 | static void tls_device_record_close(struct sock *sk, |
318 | struct tls_context *ctx, | |
319 | struct tls_record_info *record, | |
320 | struct page_frag *pfrag, | |
321 | unsigned char record_type) | |
e7b159a4 JK |
322 | { |
323 | struct tls_prot_info *prot = &ctx->prot_info; | |
6b47808f | 324 | struct page_frag dummy_tag_frag; |
e7b159a4 JK |
325 | |
326 | /* append tag | |
327 | * device will fill in the tag, we just need to append a placeholder | |
328 | * use socket memory to improve coalescing (re-using a single buffer | |
329 | * increases frag count) | |
6b47808f | 330 | * if we can't allocate memory now use the dummy page |
e7b159a4 | 331 | */ |
6b47808f JK |
332 | if (unlikely(pfrag->size - pfrag->offset < prot->tag_size) && |
333 | !skb_page_frag_refill(prot->tag_size, pfrag, sk->sk_allocation)) { | |
334 | dummy_tag_frag.page = dummy_page; | |
335 | dummy_tag_frag.offset = 0; | |
336 | pfrag = &dummy_tag_frag; | |
e7b159a4 | 337 | } |
6b47808f | 338 | tls_append_frag(record, pfrag, prot->tag_size); |
e7b159a4 JK |
339 | |
340 | /* fill prepend */ | |
341 | tls_fill_prepend(ctx, skb_frag_address(&record->frags[0]), | |
342 | record->len - prot->overhead_size, | |
6942a284 | 343 | record_type); |
e7b159a4 JK |
344 | } |
345 | ||
d80a1b9d | 346 | static int tls_create_new_record(struct tls_offload_context_tx *offload_ctx, |
e8f69799 IL |
347 | struct page_frag *pfrag, |
348 | size_t prepend_size) | |
349 | { | |
350 | struct tls_record_info *record; | |
351 | skb_frag_t *frag; | |
352 | ||
353 | record = kmalloc(sizeof(*record), GFP_KERNEL); | |
354 | if (!record) | |
355 | return -ENOMEM; | |
356 | ||
357 | frag = &record->frags[0]; | |
b51f4113 YL |
358 | skb_frag_fill_page_desc(frag, pfrag->page, pfrag->offset, |
359 | prepend_size); | |
e8f69799 IL |
360 | |
361 | get_page(pfrag->page); | |
362 | pfrag->offset += prepend_size; | |
363 | ||
364 | record->num_frags = 1; | |
365 | record->len = prepend_size; | |
366 | offload_ctx->open_record = record; | |
367 | return 0; | |
368 | } | |
369 | ||
370 | static int tls_do_allocation(struct sock *sk, | |
d80a1b9d | 371 | struct tls_offload_context_tx *offload_ctx, |
e8f69799 IL |
372 | struct page_frag *pfrag, |
373 | size_t prepend_size) | |
374 | { | |
375 | int ret; | |
376 | ||
377 | if (!offload_ctx->open_record) { | |
378 | if (unlikely(!skb_page_frag_refill(prepend_size, pfrag, | |
379 | sk->sk_allocation))) { | |
d5bee737 | 380 | READ_ONCE(sk->sk_prot)->enter_memory_pressure(sk); |
e8f69799 IL |
381 | sk_stream_moderate_sndbuf(sk); |
382 | return -ENOMEM; | |
383 | } | |
384 | ||
385 | ret = tls_create_new_record(offload_ctx, pfrag, prepend_size); | |
386 | if (ret) | |
387 | return ret; | |
388 | ||
389 | if (pfrag->size > pfrag->offset) | |
390 | return 0; | |
391 | } | |
392 | ||
393 | if (!sk_page_frag_refill(sk, pfrag)) | |
394 | return -ENOMEM; | |
395 | ||
396 | return 0; | |
397 | } | |
398 | ||
e681cc60 JK |
399 | static int tls_device_copy_data(void *addr, size_t bytes, struct iov_iter *i) |
400 | { | |
401 | size_t pre_copy, nocache; | |
402 | ||
403 | pre_copy = ~((unsigned long)addr - 1) & (SMP_CACHE_BYTES - 1); | |
404 | if (pre_copy) { | |
405 | pre_copy = min(pre_copy, bytes); | |
406 | if (copy_from_iter(addr, pre_copy, i) != pre_copy) | |
407 | return -EFAULT; | |
408 | bytes -= pre_copy; | |
409 | addr += pre_copy; | |
410 | } | |
411 | ||
412 | nocache = round_down(bytes, SMP_CACHE_BYTES); | |
413 | if (copy_from_iter_nocache(addr, nocache, i) != nocache) | |
414 | return -EFAULT; | |
415 | bytes -= nocache; | |
416 | addr += nocache; | |
417 | ||
418 | if (bytes && copy_from_iter(addr, bytes, i) != bytes) | |
419 | return -EFAULT; | |
420 | ||
421 | return 0; | |
422 | } | |
423 | ||
e8f69799 | 424 | static int tls_push_data(struct sock *sk, |
3dc8976c | 425 | struct iov_iter *iter, |
e8f69799 | 426 | size_t size, int flags, |
3dc8976c | 427 | unsigned char record_type) |
e8f69799 IL |
428 | { |
429 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
4509de14 | 430 | struct tls_prot_info *prot = &tls_ctx->prot_info; |
d80a1b9d | 431 | struct tls_offload_context_tx *ctx = tls_offload_ctx_tx(tls_ctx); |
3afef8c7 | 432 | struct tls_record_info *record; |
41477662 | 433 | int tls_push_record_flags; |
e8f69799 IL |
434 | struct page_frag *pfrag; |
435 | size_t orig_size = size; | |
436 | u32 max_open_record_len; | |
ea1dd3e9 | 437 | bool more = false; |
e8f69799 | 438 | bool done = false; |
ea1dd3e9 | 439 | int copy, rc = 0; |
e8f69799 IL |
440 | long timeo; |
441 | ||
442 | if (flags & | |
c004b0e0 HR |
443 | ~(MSG_MORE | MSG_DONTWAIT | MSG_NOSIGNAL | |
444 | MSG_SPLICE_PAGES | MSG_EOR)) | |
4a5cdc60 | 445 | return -EOPNOTSUPP; |
e8f69799 | 446 | |
c004b0e0 HR |
447 | if ((flags & (MSG_MORE | MSG_EOR)) == (MSG_MORE | MSG_EOR)) |
448 | return -EINVAL; | |
449 | ||
93277b25 | 450 | if (unlikely(sk->sk_err)) |
e8f69799 IL |
451 | return -sk->sk_err; |
452 | ||
41477662 | 453 | flags |= MSG_SENDPAGE_DECRYPTED; |
f8dd95b2 | 454 | tls_push_record_flags = flags | MSG_MORE; |
41477662 | 455 | |
e8f69799 | 456 | timeo = sock_sndtimeo(sk, flags & MSG_DONTWAIT); |
94850257 BP |
457 | if (tls_is_partially_sent_record(tls_ctx)) { |
458 | rc = tls_push_partial_record(sk, tls_ctx, flags); | |
459 | if (rc < 0) | |
460 | return rc; | |
461 | } | |
e8f69799 IL |
462 | |
463 | pfrag = sk_page_frag(sk); | |
464 | ||
465 | /* TLS_HEADER_SIZE is not counted as part of the TLS record, and | |
466 | * we need to leave room for an authentication tag. | |
467 | */ | |
468 | max_open_record_len = TLS_MAX_PAYLOAD_SIZE + | |
4509de14 | 469 | prot->prepend_size; |
e8f69799 | 470 | do { |
34ef1ed1 JK |
471 | rc = tls_do_allocation(sk, ctx, pfrag, prot->prepend_size); |
472 | if (unlikely(rc)) { | |
e8f69799 IL |
473 | rc = sk_stream_wait_memory(sk, &timeo); |
474 | if (!rc) | |
475 | continue; | |
476 | ||
477 | record = ctx->open_record; | |
478 | if (!record) | |
479 | break; | |
480 | handle_error: | |
481 | if (record_type != TLS_RECORD_TYPE_DATA) { | |
482 | /* avoid sending partial | |
483 | * record with type != | |
484 | * application_data | |
485 | */ | |
486 | size = orig_size; | |
487 | destroy_record(record); | |
488 | ctx->open_record = NULL; | |
4509de14 | 489 | } else if (record->len > prot->prepend_size) { |
e8f69799 IL |
490 | goto last_record; |
491 | } | |
492 | ||
493 | break; | |
494 | } | |
495 | ||
496 | record = ctx->open_record; | |
e8f69799 | 497 | |
c1318b39 | 498 | copy = min_t(size_t, size, max_open_record_len - record->len); |
3dc8976c | 499 | if (copy && (flags & MSG_SPLICE_PAGES)) { |
24763c9c DH |
500 | struct page_frag zc_pfrag; |
501 | struct page **pages = &zc_pfrag.page; | |
502 | size_t off; | |
503 | ||
3dc8976c DH |
504 | rc = iov_iter_extract_pages(iter, &pages, |
505 | copy, 1, 0, &off); | |
24763c9c DH |
506 | if (rc <= 0) { |
507 | if (rc == 0) | |
508 | rc = -EIO; | |
509 | goto handle_error; | |
510 | } | |
511 | copy = rc; | |
512 | ||
513 | if (WARN_ON_ONCE(!sendpage_ok(zc_pfrag.page))) { | |
3dc8976c | 514 | iov_iter_revert(iter, copy); |
24763c9c DH |
515 | rc = -EIO; |
516 | goto handle_error; | |
517 | } | |
518 | ||
519 | zc_pfrag.offset = off; | |
520 | zc_pfrag.size = copy; | |
521 | tls_append_frag(record, &zc_pfrag, copy); | |
c1318b39 BP |
522 | } else if (copy) { |
523 | copy = min_t(size_t, copy, pfrag->size - pfrag->offset); | |
524 | ||
a0df7194 | 525 | rc = tls_device_copy_data(page_address(pfrag->page) + |
c1318b39 | 526 | pfrag->offset, copy, |
3dc8976c | 527 | iter); |
a0df7194 MM |
528 | if (rc) |
529 | goto handle_error; | |
530 | tls_append_frag(record, pfrag, copy); | |
531 | } | |
e8f69799 IL |
532 | |
533 | size -= copy; | |
534 | if (!size) { | |
535 | last_record: | |
536 | tls_push_record_flags = flags; | |
f8dd95b2 | 537 | if (flags & MSG_MORE) { |
ea1dd3e9 | 538 | more = true; |
e8f69799 IL |
539 | break; |
540 | } | |
541 | ||
542 | done = true; | |
543 | } | |
544 | ||
545 | if (done || record->len >= max_open_record_len || | |
546 | (record->num_frags >= MAX_SKB_FRAGS - 1)) { | |
6b47808f JK |
547 | tls_device_record_close(sk, tls_ctx, record, |
548 | pfrag, record_type); | |
e7b159a4 | 549 | |
e8f69799 IL |
550 | rc = tls_push_record(sk, |
551 | tls_ctx, | |
552 | ctx, | |
553 | record, | |
e7b159a4 | 554 | tls_push_record_flags); |
e8f69799 IL |
555 | if (rc < 0) |
556 | break; | |
557 | } | |
558 | } while (!done); | |
559 | ||
ea1dd3e9 RM |
560 | tls_ctx->pending_open_record_frags = more; |
561 | ||
e8f69799 IL |
562 | if (orig_size - size > 0) |
563 | rc = orig_size - size; | |
564 | ||
565 | return rc; | |
566 | } | |
567 | ||
568 | int tls_device_sendmsg(struct sock *sk, struct msghdr *msg, size_t size) | |
569 | { | |
570 | unsigned char record_type = TLS_RECORD_TYPE_DATA; | |
79ffe608 | 571 | struct tls_context *tls_ctx = tls_get_ctx(sk); |
e8f69799 IL |
572 | int rc; |
573 | ||
24763c9c DH |
574 | if (!tls_ctx->zerocopy_sendfile) |
575 | msg->msg_flags &= ~MSG_SPLICE_PAGES; | |
576 | ||
79ffe608 | 577 | mutex_lock(&tls_ctx->tx_lock); |
e8f69799 IL |
578 | lock_sock(sk); |
579 | ||
580 | if (unlikely(msg->msg_controllen)) { | |
58790314 | 581 | rc = tls_process_cmsg(sk, msg, &record_type); |
e8f69799 IL |
582 | if (rc) |
583 | goto out; | |
584 | } | |
585 | ||
3dc8976c DH |
586 | rc = tls_push_data(sk, &msg->msg_iter, size, msg->msg_flags, |
587 | record_type); | |
e8f69799 IL |
588 | |
589 | out: | |
590 | release_sock(sk); | |
79ffe608 | 591 | mutex_unlock(&tls_ctx->tx_lock); |
e8f69799 IL |
592 | return rc; |
593 | } | |
594 | ||
d4c1e80b DH |
595 | void tls_device_splice_eof(struct socket *sock) |
596 | { | |
597 | struct sock *sk = sock->sk; | |
598 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
3dc8976c | 599 | struct iov_iter iter = {}; |
d4c1e80b DH |
600 | |
601 | if (!tls_is_partially_sent_record(tls_ctx)) | |
602 | return; | |
603 | ||
604 | mutex_lock(&tls_ctx->tx_lock); | |
605 | lock_sock(sk); | |
606 | ||
607 | if (tls_is_partially_sent_record(tls_ctx)) { | |
3dc8976c DH |
608 | iov_iter_bvec(&iter, ITER_SOURCE, NULL, 0, 0); |
609 | tls_push_data(sk, &iter, 0, 0, TLS_RECORD_TYPE_DATA); | |
d4c1e80b DH |
610 | } |
611 | ||
612 | release_sock(sk); | |
613 | mutex_unlock(&tls_ctx->tx_lock); | |
614 | } | |
615 | ||
d80a1b9d | 616 | struct tls_record_info *tls_get_record(struct tls_offload_context_tx *context, |
e8f69799 IL |
617 | u32 seq, u64 *p_record_sn) |
618 | { | |
619 | u64 record_sn = context->hint_record_sn; | |
06f5201c | 620 | struct tls_record_info *info, *last; |
e8f69799 IL |
621 | |
622 | info = context->retransmit_hint; | |
623 | if (!info || | |
624 | before(seq, info->end_seq - info->len)) { | |
625 | /* if retransmit_hint is irrelevant start | |
72a0f6d0 | 626 | * from the beginning of the list |
e8f69799 | 627 | */ |
d4774ac0 JK |
628 | info = list_first_entry_or_null(&context->records_list, |
629 | struct tls_record_info, list); | |
630 | if (!info) | |
631 | return NULL; | |
06f5201c RM |
632 | /* send the start_marker record if seq number is before the |
633 | * tls offload start marker sequence number. This record is | |
634 | * required to handle TCP packets which are before TLS offload | |
635 | * started. | |
636 | * And if it's not start marker, look if this seq number | |
637 | * belongs to the list. | |
638 | */ | |
639 | if (likely(!tls_record_is_start_marker(info))) { | |
640 | /* we have the first record, get the last record to see | |
641 | * if this seq number belongs to the list. | |
642 | */ | |
643 | last = list_last_entry(&context->records_list, | |
644 | struct tls_record_info, list); | |
645 | ||
646 | if (!between(seq, tls_record_start_seq(info), | |
647 | last->end_seq)) | |
648 | return NULL; | |
649 | } | |
e8f69799 IL |
650 | record_sn = context->unacked_record_sn; |
651 | } | |
652 | ||
d4774ac0 JK |
653 | /* We just need the _rcu for the READ_ONCE() */ |
654 | rcu_read_lock(); | |
655 | list_for_each_entry_from_rcu(info, &context->records_list, list) { | |
e8f69799 IL |
656 | if (before(seq, info->end_seq)) { |
657 | if (!context->retransmit_hint || | |
658 | after(info->end_seq, | |
659 | context->retransmit_hint->end_seq)) { | |
660 | context->hint_record_sn = record_sn; | |
661 | context->retransmit_hint = info; | |
662 | } | |
663 | *p_record_sn = record_sn; | |
d4774ac0 | 664 | goto exit_rcu_unlock; |
e8f69799 IL |
665 | } |
666 | record_sn++; | |
667 | } | |
d4774ac0 | 668 | info = NULL; |
e8f69799 | 669 | |
d4774ac0 JK |
670 | exit_rcu_unlock: |
671 | rcu_read_unlock(); | |
672 | return info; | |
e8f69799 IL |
673 | } |
674 | EXPORT_SYMBOL(tls_get_record); | |
675 | ||
676 | static int tls_device_push_pending_record(struct sock *sk, int flags) | |
677 | { | |
3dc8976c | 678 | struct iov_iter iter; |
e8f69799 | 679 | |
3dc8976c DH |
680 | iov_iter_kvec(&iter, ITER_SOURCE, NULL, 0, 0); |
681 | return tls_push_data(sk, &iter, 0, flags, TLS_RECORD_TYPE_DATA); | |
e8f69799 IL |
682 | } |
683 | ||
7463d3a2 BP |
684 | void tls_device_write_space(struct sock *sk, struct tls_context *ctx) |
685 | { | |
02b1fa07 | 686 | if (tls_is_partially_sent_record(ctx)) { |
7463d3a2 BP |
687 | gfp_t sk_allocation = sk->sk_allocation; |
688 | ||
02b1fa07 JK |
689 | WARN_ON_ONCE(sk->sk_write_pending); |
690 | ||
7463d3a2 | 691 | sk->sk_allocation = GFP_ATOMIC; |
41477662 JK |
692 | tls_push_partial_record(sk, ctx, |
693 | MSG_DONTWAIT | MSG_NOSIGNAL | | |
694 | MSG_SENDPAGE_DECRYPTED); | |
7463d3a2 BP |
695 | sk->sk_allocation = sk_allocation; |
696 | } | |
7463d3a2 BP |
697 | } |
698 | ||
e52972c1 | 699 | static void tls_device_resync_rx(struct tls_context *tls_ctx, |
89fec474 | 700 | struct sock *sk, u32 seq, u8 *rcd_sn) |
e52972c1 | 701 | { |
8538d29c | 702 | struct tls_offload_context_rx *rx_ctx = tls_offload_ctx_rx(tls_ctx); |
e52972c1 JK |
703 | struct net_device *netdev; |
704 | ||
8538d29c | 705 | trace_tls_device_rx_resync_send(sk, seq, rcd_sn, rx_ctx->resync_type); |
05fc8b6c | 706 | rcu_read_lock(); |
94ce3b64 | 707 | netdev = rcu_dereference(tls_ctx->netdev); |
e52972c1 | 708 | if (netdev) |
eeb2efaf JK |
709 | netdev->tlsdev_ops->tls_dev_resync(netdev, sk, seq, rcd_sn, |
710 | TLS_OFFLOAD_CTX_DIR_RX); | |
05fc8b6c | 711 | rcu_read_unlock(); |
a4d26fdb | 712 | TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSRXDEVICERESYNC); |
e52972c1 JK |
713 | } |
714 | ||
ed9b7646 BP |
715 | static bool |
716 | tls_device_rx_resync_async(struct tls_offload_resync_async *resync_async, | |
138559b9 | 717 | s64 resync_req, u32 *seq, u16 *rcd_delta) |
ed9b7646 BP |
718 | { |
719 | u32 is_async = resync_req & RESYNC_REQ_ASYNC; | |
720 | u32 req_seq = resync_req >> 32; | |
721 | u32 req_end = req_seq + ((resync_req >> 16) & 0xffff); | |
138559b9 TT |
722 | u16 i; |
723 | ||
724 | *rcd_delta = 0; | |
ed9b7646 BP |
725 | |
726 | if (is_async) { | |
138559b9 TT |
727 | /* shouldn't get to wraparound: |
728 | * too long in async stage, something bad happened | |
729 | */ | |
730 | if (WARN_ON_ONCE(resync_async->rcd_delta == USHRT_MAX)) | |
731 | return false; | |
732 | ||
ed9b7646 BP |
733 | /* asynchronous stage: log all headers seq such that |
734 | * req_seq <= seq <= end_seq, and wait for real resync request | |
735 | */ | |
138559b9 TT |
736 | if (before(*seq, req_seq)) |
737 | return false; | |
738 | if (!after(*seq, req_end) && | |
ed9b7646 BP |
739 | resync_async->loglen < TLS_DEVICE_RESYNC_ASYNC_LOGMAX) |
740 | resync_async->log[resync_async->loglen++] = *seq; | |
741 | ||
138559b9 TT |
742 | resync_async->rcd_delta++; |
743 | ||
ed9b7646 BP |
744 | return false; |
745 | } | |
746 | ||
747 | /* synchronous stage: check against the logged entries and | |
748 | * proceed to check the next entries if no match was found | |
749 | */ | |
138559b9 TT |
750 | for (i = 0; i < resync_async->loglen; i++) |
751 | if (req_seq == resync_async->log[i] && | |
752 | atomic64_try_cmpxchg(&resync_async->req, &resync_req, 0)) { | |
753 | *rcd_delta = resync_async->rcd_delta - i; | |
ed9b7646 | 754 | *seq = req_seq; |
138559b9 TT |
755 | resync_async->loglen = 0; |
756 | resync_async->rcd_delta = 0; | |
ed9b7646 BP |
757 | return true; |
758 | } | |
138559b9 TT |
759 | |
760 | resync_async->loglen = 0; | |
761 | resync_async->rcd_delta = 0; | |
ed9b7646 BP |
762 | |
763 | if (req_seq == *seq && | |
764 | atomic64_try_cmpxchg(&resync_async->req, | |
765 | &resync_req, 0)) | |
766 | return true; | |
767 | ||
768 | return false; | |
769 | } | |
770 | ||
f953d33b | 771 | void tls_device_rx_resync_new_rec(struct sock *sk, u32 rcd_len, u32 seq) |
4799ac81 BP |
772 | { |
773 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
4799ac81 | 774 | struct tls_offload_context_rx *rx_ctx; |
f953d33b | 775 | u8 rcd_sn[TLS_MAX_REC_SEQ_SIZE]; |
acb5a07a | 776 | u32 sock_data, is_req_pending; |
f953d33b | 777 | struct tls_prot_info *prot; |
4799ac81 | 778 | s64 resync_req; |
138559b9 | 779 | u16 rcd_delta; |
4799ac81 BP |
780 | u32 req_seq; |
781 | ||
782 | if (tls_ctx->rx_conf != TLS_HW) | |
783 | return; | |
c55dcdd4 MM |
784 | if (unlikely(test_bit(TLS_RX_DEV_DEGRADED, &tls_ctx->flags))) |
785 | return; | |
4799ac81 | 786 | |
f953d33b | 787 | prot = &tls_ctx->prot_info; |
4799ac81 | 788 | rx_ctx = tls_offload_ctx_rx(tls_ctx); |
f953d33b JK |
789 | memcpy(rcd_sn, tls_ctx->rx.rec_seq, prot->rec_seq_size); |
790 | ||
791 | switch (rx_ctx->resync_type) { | |
792 | case TLS_OFFLOAD_SYNC_TYPE_DRIVER_REQ: | |
793 | resync_req = atomic64_read(&rx_ctx->resync_req); | |
794 | req_seq = resync_req >> 32; | |
795 | seq += TLS_HEADER_SIZE - 1; | |
acb5a07a | 796 | is_req_pending = resync_req; |
f953d33b | 797 | |
acb5a07a | 798 | if (likely(!is_req_pending) || req_seq != seq || |
f953d33b JK |
799 | !atomic64_try_cmpxchg(&rx_ctx->resync_req, &resync_req, 0)) |
800 | return; | |
801 | break; | |
802 | case TLS_OFFLOAD_SYNC_TYPE_CORE_NEXT_HINT: | |
803 | if (likely(!rx_ctx->resync_nh_do_now)) | |
804 | return; | |
805 | ||
806 | /* head of next rec is already in, note that the sock_inq will | |
807 | * include the currently parsed message when called from parser | |
808 | */ | |
8538d29c JK |
809 | sock_data = tcp_inq(sk); |
810 | if (sock_data > rcd_len) { | |
811 | trace_tls_device_rx_resync_nh_delay(sk, sock_data, | |
812 | rcd_len); | |
f953d33b | 813 | return; |
8538d29c | 814 | } |
f953d33b JK |
815 | |
816 | rx_ctx->resync_nh_do_now = 0; | |
817 | seq += rcd_len; | |
818 | tls_bigint_increment(rcd_sn, prot->rec_seq_size); | |
819 | break; | |
ed9b7646 BP |
820 | case TLS_OFFLOAD_SYNC_TYPE_DRIVER_REQ_ASYNC: |
821 | resync_req = atomic64_read(&rx_ctx->resync_async->req); | |
822 | is_req_pending = resync_req; | |
823 | if (likely(!is_req_pending)) | |
824 | return; | |
825 | ||
826 | if (!tls_device_rx_resync_async(rx_ctx->resync_async, | |
138559b9 | 827 | resync_req, &seq, &rcd_delta)) |
ed9b7646 | 828 | return; |
138559b9 | 829 | tls_bigint_subtract(rcd_sn, rcd_delta); |
ed9b7646 | 830 | break; |
f953d33b JK |
831 | } |
832 | ||
833 | tls_device_resync_rx(tls_ctx, sk, seq, rcd_sn); | |
834 | } | |
835 | ||
836 | static void tls_device_core_ctrl_rx_resync(struct tls_context *tls_ctx, | |
837 | struct tls_offload_context_rx *ctx, | |
838 | struct sock *sk, struct sk_buff *skb) | |
839 | { | |
840 | struct strp_msg *rxm; | |
841 | ||
842 | /* device will request resyncs by itself based on stream scan */ | |
843 | if (ctx->resync_type != TLS_OFFLOAD_SYNC_TYPE_CORE_NEXT_HINT) | |
844 | return; | |
845 | /* already scheduled */ | |
846 | if (ctx->resync_nh_do_now) | |
847 | return; | |
848 | /* seen decrypted fragments since last fully-failed record */ | |
849 | if (ctx->resync_nh_reset) { | |
850 | ctx->resync_nh_reset = 0; | |
851 | ctx->resync_nh.decrypted_failed = 1; | |
852 | ctx->resync_nh.decrypted_tgt = TLS_DEVICE_RESYNC_NH_START_IVAL; | |
853 | return; | |
854 | } | |
855 | ||
856 | if (++ctx->resync_nh.decrypted_failed <= ctx->resync_nh.decrypted_tgt) | |
857 | return; | |
858 | ||
859 | /* doing resync, bump the next target in case it fails */ | |
860 | if (ctx->resync_nh.decrypted_tgt < TLS_DEVICE_RESYNC_NH_MAX_IVAL) | |
861 | ctx->resync_nh.decrypted_tgt *= 2; | |
862 | else | |
863 | ctx->resync_nh.decrypted_tgt += TLS_DEVICE_RESYNC_NH_MAX_IVAL; | |
864 | ||
865 | rxm = strp_msg(skb); | |
866 | ||
867 | /* head of next rec is already in, parser will sync for us */ | |
868 | if (tcp_inq(sk) > rxm->full_len) { | |
8538d29c | 869 | trace_tls_device_rx_resync_nh_schedule(sk); |
f953d33b JK |
870 | ctx->resync_nh_do_now = 1; |
871 | } else { | |
872 | struct tls_prot_info *prot = &tls_ctx->prot_info; | |
873 | u8 rcd_sn[TLS_MAX_REC_SEQ_SIZE]; | |
874 | ||
875 | memcpy(rcd_sn, tls_ctx->rx.rec_seq, prot->rec_seq_size); | |
876 | tls_bigint_increment(rcd_sn, prot->rec_seq_size); | |
877 | ||
878 | tls_device_resync_rx(tls_ctx, sk, tcp_sk(sk)->copied_seq, | |
879 | rcd_sn); | |
880 | } | |
4799ac81 BP |
881 | } |
882 | ||
541cc48b | 883 | static int |
ea7a9d88 | 884 | tls_device_reencrypt(struct sock *sk, struct tls_context *tls_ctx) |
4799ac81 | 885 | { |
ea7a9d88 | 886 | struct tls_sw_context_rx *sw_ctx = tls_sw_ctx_rx(tls_ctx); |
8db44ab2 | 887 | const struct tls_cipher_desc *cipher_desc; |
8b3c59a7 JK |
888 | int err, offset, copy, data_len, pos; |
889 | struct sk_buff *skb, *skb_iter; | |
4799ac81 | 890 | struct scatterlist sg[1]; |
541cc48b | 891 | struct strp_msg *rxm; |
4799ac81 BP |
892 | char *orig_buf, *buf; |
893 | ||
ea7a9d88 GP |
894 | switch (tls_ctx->crypto_recv.info.cipher_type) { |
895 | case TLS_CIPHER_AES_GCM_128: | |
56e5a6d3 | 896 | case TLS_CIPHER_AES_GCM_256: |
ea7a9d88 GP |
897 | break; |
898 | default: | |
899 | return -EINVAL; | |
900 | } | |
8db44ab2 | 901 | cipher_desc = get_cipher_desc(tls_ctx->crypto_recv.info.cipher_type); |
ea7a9d88 | 902 | |
8b3c59a7 | 903 | rxm = strp_msg(tls_strp_msg(sw_ctx)); |
8db44ab2 | 904 | orig_buf = kmalloc(rxm->full_len + TLS_HEADER_SIZE + cipher_desc->iv, |
ea7a9d88 | 905 | sk->sk_allocation); |
4799ac81 BP |
906 | if (!orig_buf) |
907 | return -ENOMEM; | |
908 | buf = orig_buf; | |
909 | ||
8b3c59a7 JK |
910 | err = tls_strp_msg_cow(sw_ctx); |
911 | if (unlikely(err)) | |
4799ac81 | 912 | goto free_buf; |
8b3c59a7 JK |
913 | |
914 | skb = tls_strp_msg(sw_ctx); | |
915 | rxm = strp_msg(skb); | |
916 | offset = rxm->offset; | |
4799ac81 BP |
917 | |
918 | sg_init_table(sg, 1); | |
919 | sg_set_buf(&sg[0], buf, | |
8db44ab2 SD |
920 | rxm->full_len + TLS_HEADER_SIZE + cipher_desc->iv); |
921 | err = skb_copy_bits(skb, offset, buf, TLS_HEADER_SIZE + cipher_desc->iv); | |
aeb11ff0 JK |
922 | if (err) |
923 | goto free_buf; | |
4799ac81 BP |
924 | |
925 | /* We are interested only in the decrypted data not the auth */ | |
541cc48b | 926 | err = decrypt_skb(sk, sg); |
4799ac81 BP |
927 | if (err != -EBADMSG) |
928 | goto free_buf; | |
929 | else | |
930 | err = 0; | |
931 | ||
8db44ab2 | 932 | data_len = rxm->full_len - cipher_desc->tag; |
4799ac81 | 933 | |
97e1caa5 | 934 | if (skb_pagelen(skb) > offset) { |
eb3d38d5 | 935 | copy = min_t(int, skb_pagelen(skb) - offset, data_len); |
4799ac81 | 936 | |
aeb11ff0 JK |
937 | if (skb->decrypted) { |
938 | err = skb_store_bits(skb, offset, buf, copy); | |
939 | if (err) | |
940 | goto free_buf; | |
941 | } | |
4799ac81 | 942 | |
97e1caa5 JK |
943 | offset += copy; |
944 | buf += copy; | |
945 | } | |
4799ac81 | 946 | |
eb3d38d5 | 947 | pos = skb_pagelen(skb); |
4799ac81 | 948 | skb_walk_frags(skb, skb_iter) { |
eb3d38d5 JK |
949 | int frag_pos; |
950 | ||
951 | /* Practically all frags must belong to msg if reencrypt | |
952 | * is needed with current strparser and coalescing logic, | |
953 | * but strparser may "get optimized", so let's be safe. | |
954 | */ | |
955 | if (pos + skb_iter->len <= offset) | |
956 | goto done_with_frag; | |
957 | if (pos >= data_len + rxm->offset) | |
958 | break; | |
959 | ||
960 | frag_pos = offset - pos; | |
961 | copy = min_t(int, skb_iter->len - frag_pos, | |
962 | data_len + rxm->offset - offset); | |
4799ac81 | 963 | |
aeb11ff0 JK |
964 | if (skb_iter->decrypted) { |
965 | err = skb_store_bits(skb_iter, frag_pos, buf, copy); | |
966 | if (err) | |
967 | goto free_buf; | |
968 | } | |
4799ac81 BP |
969 | |
970 | offset += copy; | |
971 | buf += copy; | |
eb3d38d5 JK |
972 | done_with_frag: |
973 | pos += skb_iter->len; | |
4799ac81 BP |
974 | } |
975 | ||
976 | free_buf: | |
977 | kfree(orig_buf); | |
978 | return err; | |
979 | } | |
980 | ||
541cc48b | 981 | int tls_device_decrypted(struct sock *sk, struct tls_context *tls_ctx) |
4799ac81 | 982 | { |
4799ac81 | 983 | struct tls_offload_context_rx *ctx = tls_offload_ctx_rx(tls_ctx); |
541cc48b JK |
984 | struct tls_sw_context_rx *sw_ctx = tls_sw_ctx_rx(tls_ctx); |
985 | struct sk_buff *skb = tls_strp_msg(sw_ctx); | |
986 | struct strp_msg *rxm = strp_msg(skb); | |
eca9bfaf JK |
987 | int is_decrypted, is_encrypted; |
988 | ||
989 | if (!tls_strp_msg_mixed_decrypted(sw_ctx)) { | |
990 | is_decrypted = skb->decrypted; | |
991 | is_encrypted = !is_decrypted; | |
992 | } else { | |
993 | is_decrypted = 0; | |
994 | is_encrypted = 0; | |
4799ac81 BP |
995 | } |
996 | ||
9ec1c6ac JK |
997 | trace_tls_device_decrypted(sk, tcp_sk(sk)->copied_seq - rxm->full_len, |
998 | tls_ctx->rx.rec_seq, rxm->full_len, | |
999 | is_encrypted, is_decrypted); | |
1000 | ||
c55dcdd4 MM |
1001 | if (unlikely(test_bit(TLS_RX_DEV_DEGRADED, &tls_ctx->flags))) { |
1002 | if (likely(is_encrypted || is_decrypted)) | |
71471ca3 | 1003 | return is_decrypted; |
c55dcdd4 MM |
1004 | |
1005 | /* After tls_device_down disables the offload, the next SKB will | |
1006 | * likely have initial fragments decrypted, and final ones not | |
1007 | * decrypted. We need to reencrypt that single SKB. | |
1008 | */ | |
ea7a9d88 | 1009 | return tls_device_reencrypt(sk, tls_ctx); |
c55dcdd4 MM |
1010 | } |
1011 | ||
f953d33b | 1012 | /* Return immediately if the record is either entirely plaintext or |
4799ac81 BP |
1013 | * entirely ciphertext. Otherwise handle reencrypt partially decrypted |
1014 | * record. | |
1015 | */ | |
f953d33b JK |
1016 | if (is_decrypted) { |
1017 | ctx->resync_nh_reset = 1; | |
71471ca3 | 1018 | return is_decrypted; |
f953d33b JK |
1019 | } |
1020 | if (is_encrypted) { | |
1021 | tls_device_core_ctrl_rx_resync(tls_ctx, ctx, sk, skb); | |
1022 | return 0; | |
1023 | } | |
1024 | ||
1025 | ctx->resync_nh_reset = 1; | |
ea7a9d88 | 1026 | return tls_device_reencrypt(sk, tls_ctx); |
4799ac81 BP |
1027 | } |
1028 | ||
9e995797 JK |
1029 | static void tls_device_attach(struct tls_context *ctx, struct sock *sk, |
1030 | struct net_device *netdev) | |
1031 | { | |
1032 | if (sk->sk_destruct != tls_device_sk_destruct) { | |
1033 | refcount_set(&ctx->refcount, 1); | |
1034 | dev_hold(netdev); | |
94ce3b64 | 1035 | RCU_INIT_POINTER(ctx->netdev, netdev); |
9e995797 JK |
1036 | spin_lock_irq(&tls_device_lock); |
1037 | list_add_tail(&ctx->list, &tls_device_list); | |
1038 | spin_unlock_irq(&tls_device_lock); | |
1039 | ||
1040 | ctx->sk_destruct = sk->sk_destruct; | |
8d5a49e9 | 1041 | smp_store_release(&sk->sk_destruct, tls_device_sk_destruct); |
9e995797 JK |
1042 | } |
1043 | } | |
1044 | ||
e8f69799 IL |
1045 | int tls_set_device_offload(struct sock *sk, struct tls_context *ctx) |
1046 | { | |
4509de14 VG |
1047 | struct tls_context *tls_ctx = tls_get_ctx(sk); |
1048 | struct tls_prot_info *prot = &tls_ctx->prot_info; | |
8db44ab2 | 1049 | const struct tls_cipher_desc *cipher_desc; |
e8f69799 | 1050 | struct tls_record_info *start_marker_record; |
d80a1b9d | 1051 | struct tls_offload_context_tx *offload_ctx; |
e8f69799 IL |
1052 | struct tls_crypto_info *crypto_info; |
1053 | struct net_device *netdev; | |
1054 | char *iv, *rec_seq; | |
1055 | struct sk_buff *skb; | |
e8f69799 | 1056 | __be64 rcd_sn; |
90962b48 | 1057 | int rc; |
e8f69799 IL |
1058 | |
1059 | if (!ctx) | |
90962b48 | 1060 | return -EINVAL; |
e8f69799 | 1061 | |
90962b48 JK |
1062 | if (ctx->priv_ctx_tx) |
1063 | return -EEXIST; | |
e8f69799 | 1064 | |
b1a6f56b ZX |
1065 | netdev = get_netdev_for_sock(sk); |
1066 | if (!netdev) { | |
1067 | pr_err_ratelimited("%s: netdev not found\n", __func__); | |
1068 | return -EINVAL; | |
1069 | } | |
e8f69799 | 1070 | |
b1a6f56b ZX |
1071 | if (!(netdev->features & NETIF_F_HW_TLS_TX)) { |
1072 | rc = -EOPNOTSUPP; | |
1073 | goto release_netdev; | |
e8f69799 IL |
1074 | } |
1075 | ||
86029d10 | 1076 | crypto_info = &ctx->crypto_send.info; |
618bac45 JK |
1077 | if (crypto_info->version != TLS_1_2_VERSION) { |
1078 | rc = -EOPNOTSUPP; | |
b1a6f56b | 1079 | goto release_netdev; |
618bac45 JK |
1080 | } |
1081 | ||
8db44ab2 | 1082 | cipher_desc = get_cipher_desc(crypto_info->cipher_type); |
3524dd4d | 1083 | if (!cipher_desc || !cipher_desc->offloadable) { |
89fec474 | 1084 | rc = -EINVAL; |
b1a6f56b | 1085 | goto release_netdev; |
89fec474 JK |
1086 | } |
1087 | ||
3524dd4d SD |
1088 | iv = crypto_info_iv(crypto_info, cipher_desc); |
1089 | rec_seq = crypto_info_rec_seq(crypto_info, cipher_desc); | |
1090 | ||
ab232e61 JK |
1091 | prot->version = crypto_info->version; |
1092 | prot->cipher_type = crypto_info->cipher_type; | |
8db44ab2 SD |
1093 | prot->prepend_size = TLS_HEADER_SIZE + cipher_desc->iv; |
1094 | prot->tag_size = cipher_desc->tag; | |
4509de14 | 1095 | prot->overhead_size = prot->prepend_size + prot->tag_size; |
8db44ab2 SD |
1096 | prot->iv_size = cipher_desc->iv; |
1097 | prot->salt_size = cipher_desc->salt; | |
1098 | ctx->tx.iv = kmalloc(cipher_desc->iv + cipher_desc->salt, GFP_KERNEL); | |
e8f69799 IL |
1099 | if (!ctx->tx.iv) { |
1100 | rc = -ENOMEM; | |
b1a6f56b | 1101 | goto release_netdev; |
e8f69799 IL |
1102 | } |
1103 | ||
8db44ab2 | 1104 | memcpy(ctx->tx.iv + cipher_desc->salt, iv, cipher_desc->iv); |
e8f69799 | 1105 | |
8db44ab2 SD |
1106 | prot->rec_seq_size = cipher_desc->rec_seq; |
1107 | ctx->tx.rec_seq = kmemdup(rec_seq, cipher_desc->rec_seq, GFP_KERNEL); | |
e8f69799 IL |
1108 | if (!ctx->tx.rec_seq) { |
1109 | rc = -ENOMEM; | |
1110 | goto free_iv; | |
1111 | } | |
e8f69799 | 1112 | |
b1a6f56b ZX |
1113 | start_marker_record = kmalloc(sizeof(*start_marker_record), GFP_KERNEL); |
1114 | if (!start_marker_record) { | |
1115 | rc = -ENOMEM; | |
1116 | goto free_rec_seq; | |
1117 | } | |
1118 | ||
1119 | offload_ctx = kzalloc(TLS_OFFLOAD_CONTEXT_SIZE_TX, GFP_KERNEL); | |
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 IL |
1128 | |
1129 | /* start at rec_seq - 1 to account for the start marker record */ | |
1130 | memcpy(&rcd_sn, ctx->tx.rec_seq, sizeof(rcd_sn)); | |
1131 | offload_ctx->unacked_record_sn = be64_to_cpu(rcd_sn) - 1; | |
1132 | ||
1133 | start_marker_record->end_seq = tcp_sk(sk)->write_seq; | |
1134 | start_marker_record->len = 0; | |
1135 | start_marker_record->num_frags = 0; | |
1136 | ||
7adc91e0 TT |
1137 | INIT_WORK(&offload_ctx->destruct_work, tls_device_tx_del_task); |
1138 | offload_ctx->ctx = ctx; | |
1139 | ||
e8f69799 IL |
1140 | INIT_LIST_HEAD(&offload_ctx->records_list); |
1141 | list_add_tail(&start_marker_record->list, &offload_ctx->records_list); | |
1142 | spin_lock_init(&offload_ctx->lock); | |
895262d8 BP |
1143 | sg_init_table(offload_ctx->sg_tx_data, |
1144 | ARRAY_SIZE(offload_ctx->sg_tx_data)); | |
e8f69799 IL |
1145 | |
1146 | clean_acked_data_enable(inet_csk(sk), &tls_icsk_clean_acked); | |
1147 | ctx->push_pending_record = tls_device_push_pending_record; | |
e8f69799 IL |
1148 | |
1149 | /* TLS offload is greatly simplified if we don't send | |
1150 | * SKBs where only part of the payload needs to be encrypted. | |
1151 | * So mark the last skb in the write queue as end of record. | |
1152 | */ | |
1153 | skb = tcp_write_queue_tail(sk); | |
1154 | if (skb) | |
1155 | TCP_SKB_CB(skb)->eor = 1; | |
1156 | ||
e8f69799 IL |
1157 | /* Avoid offloading if the device is down |
1158 | * We don't want to offload new flows after | |
1159 | * the NETDEV_DOWN event | |
3544c98a JK |
1160 | * |
1161 | * device_offload_lock is taken in tls_devices's NETDEV_DOWN | |
1162 | * handler thus protecting from the device going down before | |
1163 | * ctx was added to tls_device_list. | |
e8f69799 | 1164 | */ |
3544c98a | 1165 | down_read(&device_offload_lock); |
e8f69799 IL |
1166 | if (!(netdev->flags & IFF_UP)) { |
1167 | rc = -EINVAL; | |
3544c98a | 1168 | goto release_lock; |
e8f69799 IL |
1169 | } |
1170 | ||
1171 | ctx->priv_ctx_tx = offload_ctx; | |
1172 | rc = netdev->tlsdev_ops->tls_dev_add(netdev, sk, TLS_OFFLOAD_CTX_DIR_TX, | |
86029d10 | 1173 | &ctx->crypto_send.info, |
e8f69799 | 1174 | tcp_sk(sk)->write_seq); |
8538d29c JK |
1175 | trace_tls_device_offload_set(sk, TLS_OFFLOAD_CTX_DIR_TX, |
1176 | tcp_sk(sk)->write_seq, rec_seq, rc); | |
e8f69799 | 1177 | if (rc) |
3544c98a | 1178 | goto release_lock; |
e8f69799 | 1179 | |
4799ac81 | 1180 | tls_device_attach(ctx, sk, netdev); |
3544c98a | 1181 | up_read(&device_offload_lock); |
e8f69799 | 1182 | |
ed3c9a2f | 1183 | /* following this assignment tls_is_skb_tx_device_offloaded |
e8f69799 IL |
1184 | * will return true and the context might be accessed |
1185 | * by the netdev's xmit function. | |
1186 | */ | |
4799ac81 BP |
1187 | smp_store_release(&sk->sk_validate_xmit_skb, tls_validate_xmit_skb); |
1188 | dev_put(netdev); | |
90962b48 JK |
1189 | |
1190 | return 0; | |
e8f69799 | 1191 | |
e8f69799 IL |
1192 | release_lock: |
1193 | up_read(&device_offload_lock); | |
1194 | clean_acked_data_disable(inet_csk(sk)); | |
1195 | crypto_free_aead(offload_ctx->aead_send); | |
e8f69799 IL |
1196 | free_offload_ctx: |
1197 | kfree(offload_ctx); | |
1198 | ctx->priv_ctx_tx = NULL; | |
1199 | free_marker_record: | |
1200 | kfree(start_marker_record); | |
b1a6f56b ZX |
1201 | free_rec_seq: |
1202 | kfree(ctx->tx.rec_seq); | |
1203 | free_iv: | |
1204 | kfree(ctx->tx.iv); | |
1205 | release_netdev: | |
1206 | dev_put(netdev); | |
e8f69799 IL |
1207 | return rc; |
1208 | } | |
1209 | ||
4799ac81 BP |
1210 | int tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx) |
1211 | { | |
8538d29c | 1212 | struct tls12_crypto_info_aes_gcm_128 *info; |
4799ac81 BP |
1213 | struct tls_offload_context_rx *context; |
1214 | struct net_device *netdev; | |
1215 | int rc = 0; | |
1216 | ||
618bac45 JK |
1217 | if (ctx->crypto_recv.info.version != TLS_1_2_VERSION) |
1218 | return -EOPNOTSUPP; | |
1219 | ||
4799ac81 BP |
1220 | netdev = get_netdev_for_sock(sk); |
1221 | if (!netdev) { | |
1222 | pr_err_ratelimited("%s: netdev not found\n", __func__); | |
3544c98a | 1223 | return -EINVAL; |
4799ac81 BP |
1224 | } |
1225 | ||
1226 | if (!(netdev->features & NETIF_F_HW_TLS_RX)) { | |
4a5cdc60 | 1227 | rc = -EOPNOTSUPP; |
4799ac81 BP |
1228 | goto release_netdev; |
1229 | } | |
1230 | ||
1231 | /* Avoid offloading if the device is down | |
1232 | * We don't want to offload new flows after | |
1233 | * the NETDEV_DOWN event | |
3544c98a JK |
1234 | * |
1235 | * device_offload_lock is taken in tls_devices's NETDEV_DOWN | |
1236 | * handler thus protecting from the device going down before | |
1237 | * ctx was added to tls_device_list. | |
4799ac81 | 1238 | */ |
3544c98a | 1239 | down_read(&device_offload_lock); |
4799ac81 BP |
1240 | if (!(netdev->flags & IFF_UP)) { |
1241 | rc = -EINVAL; | |
3544c98a | 1242 | goto release_lock; |
4799ac81 BP |
1243 | } |
1244 | ||
1245 | context = kzalloc(TLS_OFFLOAD_CONTEXT_SIZE_RX, GFP_KERNEL); | |
1246 | if (!context) { | |
1247 | rc = -ENOMEM; | |
3544c98a | 1248 | goto release_lock; |
4799ac81 | 1249 | } |
f953d33b | 1250 | context->resync_nh_reset = 1; |
4799ac81 BP |
1251 | |
1252 | ctx->priv_ctx_rx = context; | |
1253 | rc = tls_set_sw_offload(sk, ctx, 0); | |
1254 | if (rc) | |
1255 | goto release_ctx; | |
1256 | ||
1257 | rc = netdev->tlsdev_ops->tls_dev_add(netdev, sk, TLS_OFFLOAD_CTX_DIR_RX, | |
86029d10 | 1258 | &ctx->crypto_recv.info, |
4799ac81 | 1259 | tcp_sk(sk)->copied_seq); |
8538d29c JK |
1260 | info = (void *)&ctx->crypto_recv.info; |
1261 | trace_tls_device_offload_set(sk, TLS_OFFLOAD_CTX_DIR_RX, | |
1262 | tcp_sk(sk)->copied_seq, info->rec_seq, rc); | |
e49d268d | 1263 | if (rc) |
4799ac81 | 1264 | goto free_sw_resources; |
4799ac81 BP |
1265 | |
1266 | tls_device_attach(ctx, sk, netdev); | |
90962b48 JK |
1267 | up_read(&device_offload_lock); |
1268 | ||
1269 | dev_put(netdev); | |
1270 | ||
1271 | return 0; | |
4799ac81 BP |
1272 | |
1273 | free_sw_resources: | |
62ef81d5 | 1274 | up_read(&device_offload_lock); |
4799ac81 | 1275 | tls_sw_free_resources_rx(sk); |
62ef81d5 | 1276 | down_read(&device_offload_lock); |
4799ac81 BP |
1277 | release_ctx: |
1278 | ctx->priv_ctx_rx = NULL; | |
4799ac81 BP |
1279 | release_lock: |
1280 | up_read(&device_offload_lock); | |
3544c98a JK |
1281 | release_netdev: |
1282 | dev_put(netdev); | |
4799ac81 BP |
1283 | return rc; |
1284 | } | |
1285 | ||
1286 | void tls_device_offload_cleanup_rx(struct sock *sk) | |
1287 | { | |
1288 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
1289 | struct net_device *netdev; | |
1290 | ||
1291 | down_read(&device_offload_lock); | |
94ce3b64 MM |
1292 | netdev = rcu_dereference_protected(tls_ctx->netdev, |
1293 | lockdep_is_held(&device_offload_lock)); | |
4799ac81 BP |
1294 | if (!netdev) |
1295 | goto out; | |
1296 | ||
4799ac81 BP |
1297 | netdev->tlsdev_ops->tls_dev_del(netdev, tls_ctx, |
1298 | TLS_OFFLOAD_CTX_DIR_RX); | |
1299 | ||
1300 | if (tls_ctx->tx_conf != TLS_HW) { | |
1301 | dev_put(netdev); | |
94ce3b64 | 1302 | rcu_assign_pointer(tls_ctx->netdev, NULL); |
025cc2fb MM |
1303 | } else { |
1304 | set_bit(TLS_RX_DEV_CLOSED, &tls_ctx->flags); | |
4799ac81 BP |
1305 | } |
1306 | out: | |
1307 | up_read(&device_offload_lock); | |
4799ac81 BP |
1308 | tls_sw_release_resources_rx(sk); |
1309 | } | |
1310 | ||
e8f69799 IL |
1311 | static int tls_device_down(struct net_device *netdev) |
1312 | { | |
1313 | struct tls_context *ctx, *tmp; | |
1314 | unsigned long flags; | |
1315 | LIST_HEAD(list); | |
1316 | ||
1317 | /* Request a write lock to block new offload attempts */ | |
1318 | down_write(&device_offload_lock); | |
1319 | ||
1320 | spin_lock_irqsave(&tls_device_lock, flags); | |
1321 | list_for_each_entry_safe(ctx, tmp, &tls_device_list, list) { | |
94ce3b64 MM |
1322 | struct net_device *ctx_netdev = |
1323 | rcu_dereference_protected(ctx->netdev, | |
1324 | lockdep_is_held(&device_offload_lock)); | |
1325 | ||
1326 | if (ctx_netdev != netdev || | |
e8f69799 IL |
1327 | !refcount_inc_not_zero(&ctx->refcount)) |
1328 | continue; | |
1329 | ||
1330 | list_move(&ctx->list, &list); | |
1331 | } | |
1332 | spin_unlock_irqrestore(&tls_device_lock, flags); | |
1333 | ||
1334 | list_for_each_entry_safe(ctx, tmp, &list, list) { | |
c55dcdd4 | 1335 | /* Stop offloaded TX and switch to the fallback. |
ed3c9a2f | 1336 | * tls_is_skb_tx_device_offloaded will return false. |
c55dcdd4 MM |
1337 | */ |
1338 | WRITE_ONCE(ctx->sk->sk_validate_xmit_skb, tls_validate_xmit_skb_sw); | |
1339 | ||
1340 | /* Stop the RX and TX resync. | |
1341 | * tls_dev_resync must not be called after tls_dev_del. | |
1342 | */ | |
94ce3b64 | 1343 | rcu_assign_pointer(ctx->netdev, NULL); |
c55dcdd4 MM |
1344 | |
1345 | /* Start skipping the RX resync logic completely. */ | |
1346 | set_bit(TLS_RX_DEV_DEGRADED, &ctx->flags); | |
1347 | ||
1348 | /* Sync with inflight packets. After this point: | |
1349 | * TX: no non-encrypted packets will be passed to the driver. | |
1350 | * RX: resync requests from the driver will be ignored. | |
1351 | */ | |
1352 | synchronize_net(); | |
1353 | ||
1354 | /* Release the offload context on the driver side. */ | |
4799ac81 BP |
1355 | if (ctx->tx_conf == TLS_HW) |
1356 | netdev->tlsdev_ops->tls_dev_del(netdev, ctx, | |
1357 | TLS_OFFLOAD_CTX_DIR_TX); | |
025cc2fb MM |
1358 | if (ctx->rx_conf == TLS_HW && |
1359 | !test_bit(TLS_RX_DEV_CLOSED, &ctx->flags)) | |
4799ac81 BP |
1360 | netdev->tlsdev_ops->tls_dev_del(netdev, ctx, |
1361 | TLS_OFFLOAD_CTX_DIR_RX); | |
c55dcdd4 | 1362 | |
e8f69799 | 1363 | dev_put(netdev); |
e8f69799 | 1364 | |
c55dcdd4 MM |
1365 | /* Move the context to a separate list for two reasons: |
1366 | * 1. When the context is deallocated, list_del is called. | |
1367 | * 2. It's no longer an offloaded context, so we don't want to | |
1368 | * run offload-specific code on this context. | |
1369 | */ | |
1370 | spin_lock_irqsave(&tls_device_lock, flags); | |
1371 | list_move_tail(&ctx->list, &tls_device_down_list); | |
1372 | spin_unlock_irqrestore(&tls_device_lock, flags); | |
1373 | ||
1374 | /* Device contexts for RX and TX will be freed in on sk_destruct | |
1375 | * by tls_device_free_ctx. rx_conf and tx_conf stay in TLS_HW. | |
3740651b | 1376 | * Now release the ref taken above. |
c55dcdd4 | 1377 | */ |
f6336724 MM |
1378 | if (refcount_dec_and_test(&ctx->refcount)) { |
1379 | /* sk_destruct ran after tls_device_down took a ref, and | |
1380 | * it returned early. Complete the destruction here. | |
1381 | */ | |
1382 | list_del(&ctx->list); | |
3740651b | 1383 | tls_device_free_ctx(ctx); |
f6336724 | 1384 | } |
e8f69799 IL |
1385 | } |
1386 | ||
1387 | up_write(&device_offload_lock); | |
1388 | ||
7adc91e0 | 1389 | flush_workqueue(destruct_wq); |
e8f69799 IL |
1390 | |
1391 | return NOTIFY_DONE; | |
1392 | } | |
1393 | ||
1394 | static int tls_dev_event(struct notifier_block *this, unsigned long event, | |
1395 | void *ptr) | |
1396 | { | |
1397 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
1398 | ||
c3f4a6c3 JK |
1399 | if (!dev->tlsdev_ops && |
1400 | !(dev->features & (NETIF_F_HW_TLS_RX | NETIF_F_HW_TLS_TX))) | |
e8f69799 IL |
1401 | return NOTIFY_DONE; |
1402 | ||
1403 | switch (event) { | |
1404 | case NETDEV_REGISTER: | |
1405 | case NETDEV_FEAT_CHANGE: | |
4e5a7332 TT |
1406 | if (netif_is_bond_master(dev)) |
1407 | return NOTIFY_DONE; | |
4799ac81 | 1408 | if ((dev->features & NETIF_F_HW_TLS_RX) && |
eeb2efaf | 1409 | !dev->tlsdev_ops->tls_dev_resync) |
4799ac81 BP |
1410 | return NOTIFY_BAD; |
1411 | ||
e8f69799 IL |
1412 | if (dev->tlsdev_ops && |
1413 | dev->tlsdev_ops->tls_dev_add && | |
1414 | dev->tlsdev_ops->tls_dev_del) | |
1415 | return NOTIFY_DONE; | |
1416 | else | |
1417 | return NOTIFY_BAD; | |
1418 | case NETDEV_DOWN: | |
1419 | return tls_device_down(dev); | |
1420 | } | |
1421 | return NOTIFY_DONE; | |
1422 | } | |
1423 | ||
1424 | static struct notifier_block tls_dev_notifier = { | |
1425 | .notifier_call = tls_dev_event, | |
1426 | }; | |
1427 | ||
3d8c51b2 | 1428 | int __init tls_device_init(void) |
e8f69799 | 1429 | { |
7adc91e0 TT |
1430 | int err; |
1431 | ||
6b47808f JK |
1432 | dummy_page = alloc_page(GFP_KERNEL); |
1433 | if (!dummy_page) | |
7adc91e0 TT |
1434 | return -ENOMEM; |
1435 | ||
6b47808f JK |
1436 | destruct_wq = alloc_workqueue("ktls_device_destruct", 0, 0); |
1437 | if (!destruct_wq) { | |
1438 | err = -ENOMEM; | |
1439 | goto err_free_dummy; | |
1440 | } | |
1441 | ||
7adc91e0 TT |
1442 | err = register_netdevice_notifier(&tls_dev_notifier); |
1443 | if (err) | |
6b47808f | 1444 | goto err_destroy_wq; |
7adc91e0 | 1445 | |
6b47808f JK |
1446 | return 0; |
1447 | ||
1448 | err_destroy_wq: | |
1449 | destroy_workqueue(destruct_wq); | |
1450 | err_free_dummy: | |
1451 | put_page(dummy_page); | |
7adc91e0 | 1452 | return err; |
e8f69799 IL |
1453 | } |
1454 | ||
1455 | void __exit tls_device_cleanup(void) | |
1456 | { | |
1457 | unregister_netdevice_notifier(&tls_dev_notifier); | |
7adc91e0 | 1458 | destroy_workqueue(destruct_wq); |
494bc1d2 | 1459 | clean_acked_data_flush(); |
6b47808f | 1460 | put_page(dummy_page); |
e8f69799 | 1461 | } |