blob: 3a33924db2bc786cd764c8e1e1517ac12539fd24 [file] [log] [blame]
Dave Watson3c4d7552017-06-14 11:37:39 -07001/*
2 * Copyright (c) 2016-2017, Mellanox Technologies. All rights reserved.
3 * Copyright (c) 2016-2017, Dave Watson <davejwatson@fb.com>. All rights reserved.
4 *
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
10 *
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
13 * conditions are met:
14 *
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer.
18 *
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31 * SOFTWARE.
32 */
33
34#ifndef _TLS_OFFLOAD_H
35#define _TLS_OFFLOAD_H
36
37#include <linux/types.h>
Dmitry V. Levinb9f3eb42017-11-14 06:30:11 +030038#include <asm/byteorder.h>
Vakul Garga54667f2018-01-31 21:34:37 +053039#include <linux/crypto.h>
Dmitry V. Levinb9f3eb42017-11-14 06:30:11 +030040#include <linux/socket.h>
41#include <linux/tcp.h>
Jakub Kicinski79ffe602019-11-05 14:24:35 -080042#include <linux/mutex.h>
Jakub Kicinski2e361172019-06-05 14:11:39 -070043#include <linux/netdevice.h>
Jakub Kicinski15a7dea2019-08-30 12:25:47 +020044#include <linux/rcupdate.h>
Daniel Borkmannd829e9c2018-10-13 02:45:59 +020045
Jakub Kicinskid26b6982019-10-04 16:19:24 -070046#include <net/net_namespace.h>
Dmitry V. Levinb9f3eb42017-11-14 06:30:11 +030047#include <net/tcp.h>
Dave Watsonc46234e2018-03-22 10:10:35 -070048#include <net/strparser.h>
Vakul Garga42055e2018-09-21 09:46:13 +053049#include <crypto/aead.h>
Dave Watson3c4d7552017-06-14 11:37:39 -070050#include <uapi/linux/tls.h>
51
Jakub Kicinski58790312022-07-07 18:03:13 -070052struct tls_rec;
Dave Watson3c4d7552017-06-14 11:37:39 -070053
54/* Maximum data size carried in a TLS record */
55#define TLS_MAX_PAYLOAD_SIZE ((size_t)1 << 14)
56
57#define TLS_HEADER_SIZE 5
58#define TLS_NONCE_OFFSET TLS_HEADER_SIZE
59
60#define TLS_CRYPTO_INFO_READY(info) ((info)->cipher_type)
61
Dave Watson3c4d7552017-06-14 11:37:39 -070062#define TLS_AAD_SPACE_SIZE 13
Atul Guptadd0bed12018-03-31 21:41:52 +053063
Sabrina Dubrocabee6b7b2023-10-09 22:50:44 +020064#define TLS_MAX_IV_SIZE 16
Sabrina Dubroca1c1cb312023-10-09 22:50:45 +020065#define TLS_MAX_SALT_SIZE 4
Jakub Kicinskia8340cc2022-04-07 20:38:19 -070066#define TLS_TAG_SIZE 16
Jakub Kicinski89fec472019-06-10 21:40:00 -070067#define TLS_MAX_REC_SEQ_SIZE 8
Jakub Kicinski50a07aa2022-07-07 18:03:10 -070068#define TLS_MAX_AAD_SIZE TLS_AAD_SPACE_SIZE
Vakul Gargf295b3a2019-03-20 02:03:36 +000069
Tianjia Zhang128cfb82021-09-28 14:28:43 +080070/* For CCM mode, the full 16-bytes of IV is made of '4' fields of given sizes.
Vakul Gargf295b3a2019-03-20 02:03:36 +000071 *
72 * IV[16] = b0[1] || implicit nonce[4] || explicit nonce[8] || length[3]
73 *
74 * The field 'length' is encoded in field 'b0' as '(length width - 1)'.
75 * Hence b0 contains (3 - 1) = 2.
76 */
77#define TLS_AES_CCM_IV_B0_BYTE 2
Tianjia Zhang128cfb82021-09-28 14:28:43 +080078#define TLS_SM4_CCM_IV_B0_BYTE 2
Vakul Gargf295b3a2019-03-20 02:03:36 +000079
Boris Pismenny4799ac82018-07-13 14:33:43 +030080enum {
81 TLS_BASE,
82 TLS_SW,
Boris Pismenny4799ac82018-07-13 14:33:43 +030083 TLS_HW,
Boris Pismenny4799ac82018-07-13 14:33:43 +030084 TLS_HW_RECORD,
85 TLS_NUM_CONFIG,
86};
87
Vakul Garga42055e2018-09-21 09:46:13 +053088struct tx_work {
89 struct delayed_work work;
90 struct sock *sk;
91};
92
93struct tls_sw_context_tx {
94 struct crypto_aead *aead_send;
95 struct crypto_wait async_wait;
96 struct tx_work tx_work;
97 struct tls_rec *open_rec;
Vakul Garg9932a292018-09-24 15:35:56 +053098 struct list_head tx_list;
Vakul Garga42055e2018-09-21 09:46:13 +053099 atomic_t encrypt_pending;
Jakub Kicinski5c5458e2019-10-06 21:09:31 -0700100 u8 async_capable:1;
Vakul Garga42055e2018-09-21 09:46:13 +0530101
102#define BIT_TX_SCHEDULED 0
John Fastabendf87e62d2019-07-19 10:29:16 -0700103#define BIT_TX_CLOSING 1
Vakul Garga42055e2018-09-21 09:46:13 +0530104 unsigned long tx_bitmask;
Dave Watson3c4d7552017-06-14 11:37:39 -0700105};
106
Jakub Kicinski84c61fe2022-07-22 16:50:33 -0700107struct tls_strparser {
108 struct sock *sk;
109
110 u32 mark : 8;
111 u32 stopped : 1;
112 u32 copy_mode : 1;
Jakub Kicinskieca9bfa2023-05-16 18:50:41 -0700113 u32 mixed_decrypted : 1;
Sabrina Dubroca08443702024-04-24 12:25:47 +0200114
115 bool msg_ready;
Jakub Kicinski84c61fe2022-07-22 16:50:33 -0700116
117 struct strp_msg stm;
118
119 struct sk_buff *anchor;
120 struct work_struct work;
121};
122
Boris Pismennyf66de3e2018-04-30 10:16:15 +0300123struct tls_sw_context_rx {
124 struct crypto_aead *aead_recv;
125 struct crypto_wait async_wait;
Vakul Garg692d7b52019-01-16 10:40:16 +0000126 struct sk_buff_head rx_list; /* list of decrypted 'data' records */
Boris Pismennyf66de3e2018-04-30 10:16:15 +0300127 void (*saved_data_ready)(struct sock *sk);
John Fastabend924ad652018-10-13 02:46:00 +0200128
Jakub Kicinski4cbc3252022-07-14 22:22:25 -0700129 u8 reader_present;
Jakub Kicinski5c5458e2019-10-06 21:09:31 -0700130 u8 async_capable:1;
Jakub Kicinski88527792022-07-05 16:59:24 -0700131 u8 zc_capable:1;
Jakub Kicinski4cbc3252022-07-14 22:22:25 -0700132 u8 reader_contended:1;
Jakub Kicinski84c61fe2022-07-22 16:50:33 -0700133
134 struct tls_strparser strp;
135
Vakul Garg94524d82018-08-29 15:26:55 +0530136 atomic_t decrypt_pending;
Jakub Kicinskic618db22022-07-14 22:22:33 -0700137 struct sk_buff_head async_hold;
Jakub Kicinski4cbc3252022-07-14 22:22:25 -0700138 struct wait_queue_head wq;
Vakul Garg94524d82018-08-29 15:26:55 +0530139};
140
Ilya Lesokhine8f69792018-04-30 10:16:16 +0300141struct tls_record_info {
142 struct list_head list;
143 u32 end_seq;
144 int len;
145 int num_frags;
146 skb_frag_t frags[MAX_SKB_FRAGS];
147};
148
Sabrina Dubroca9f0c8242023-10-09 22:50:54 +0200149#define TLS_DRIVER_STATE_SIZE_TX 16
Boris Pismennyd80a1b9d2018-07-13 14:33:39 +0300150struct tls_offload_context_tx {
Ilya Lesokhine8f69792018-04-30 10:16:16 +0300151 struct crypto_aead *aead_send;
152 spinlock_t lock; /* protects records list */
153 struct list_head records_list;
154 struct tls_record_info *open_record;
155 struct tls_record_info *retransmit_hint;
156 u64 hint_record_sn;
157 u64 unacked_record_sn;
158
159 struct scatterlist sg_tx_data[MAX_SKB_FRAGS];
160 void (*sk_destruct)(struct sock *sk);
Tariq Toukan7adc91e2022-07-27 12:43:42 +0300161 struct work_struct destruct_work;
162 struct tls_context *ctx;
Ilya Lesokhine8f69792018-04-30 10:16:16 +0300163 /* The TLS layer reserves room for driver specific state
164 * Currently the belief is that there is not enough
165 * driver specific state to justify another layer of indirection
166 */
Sabrina Dubroca9f0c8242023-10-09 22:50:54 +0200167 u8 driver_state[TLS_DRIVER_STATE_SIZE_TX] __aligned(8);
Ilya Lesokhine8f69792018-04-30 10:16:16 +0300168};
169
Jakub Kicinskie52972c2019-06-04 12:00:12 -0700170enum tls_context_flags {
Maxim Mikityanskiyc55dcdd2021-06-01 15:08:00 +0300171 /* tls_device_down was called after the netdev went down, device state
172 * was released, and kTLS works in software, even though rx_conf is
173 * still TLS_HW (needed for transition).
174 */
175 TLS_RX_DEV_DEGRADED = 0,
Jakub Kicinski50180072019-06-10 21:40:09 -0700176 /* Unlike RX where resync is driven entirely by the core in TX only
177 * the driver knows when things went out of sync, so we need the flag
178 * to be atomic.
179 */
180 TLS_TX_SYNC_SCHED = 1,
Maxim Mikityanskiy025cc2f2020-11-25 14:18:10 -0800181 /* tls_dev_del was called for the RX side, device state was released,
182 * but tls_ctx->netdev might still be kept, because TX-side driver
183 * resources might not be released yet. Used to prevent the second
184 * tls_dev_del call in tls_device_down if it happens simultaneously.
185 */
186 TLS_RX_DEV_CLOSED = 2,
Jakub Kicinskie52972c2019-06-04 12:00:12 -0700187};
188
Dave Watsondbe42552018-03-22 10:10:06 -0700189struct cipher_context {
Sabrina Dubroca1c1cb312023-10-09 22:50:45 +0200190 char iv[TLS_MAX_IV_SIZE + TLS_MAX_SALT_SIZE];
Sabrina Dubroca6d5029e2023-10-09 22:50:43 +0200191 char rec_seq[TLS_MAX_REC_SEQ_SIZE];
Dave Watsondbe42552018-03-22 10:10:06 -0700192};
193
Sabrina Dubroca86029d12018-09-12 17:44:42 +0200194union tls_crypto_context {
195 struct tls_crypto_info info;
Dave Watsonfb99bce2019-01-30 21:58:05 +0000196 union {
197 struct tls12_crypto_info_aes_gcm_128 aes_gcm_128;
198 struct tls12_crypto_info_aes_gcm_256 aes_gcm_256;
Vadim Fedorenko923c40c2020-11-24 18:24:47 +0300199 struct tls12_crypto_info_chacha20_poly1305 chacha20_poly1305;
Tianjia Zhang39d8fb92021-10-25 21:04:39 +0800200 struct tls12_crypto_info_sm4_gcm sm4_gcm;
201 struct tls12_crypto_info_sm4_ccm sm4_ccm;
Dave Watsonfb99bce2019-01-30 21:58:05 +0000202 };
Sabrina Dubroca86029d12018-09-12 17:44:42 +0200203};
204
Vakul Garg4509de12019-02-14 07:11:35 +0000205struct tls_prot_info {
206 u16 version;
207 u16 cipher_type;
208 u16 prepend_size;
209 u16 tag_size;
210 u16 overhead_size;
211 u16 iv_size;
Vakul Gargf295b3a2019-03-20 02:03:36 +0000212 u16 salt_size;
Vakul Garg4509de12019-02-14 07:11:35 +0000213 u16 rec_seq_size;
214 u16 aad_size;
215 u16 tail_size;
216};
217
Dave Watson3c4d7552017-06-14 11:37:39 -0700218struct tls_context {
Jakub Kicinskif0aaa2c2019-06-03 15:17:04 -0700219 /* read-only cache line */
Vakul Garg4509de12019-02-14 07:11:35 +0000220 struct tls_prot_info prot_info;
221
Boris Pismennyf66de3e2018-04-30 10:16:15 +0300222 u8 tx_conf:3;
223 u8 rx_conf:3;
Boris Pismennyc1318b32022-05-18 12:27:31 +0300224 u8 zerocopy_sendfile:1;
Jakub Kicinski88527792022-07-05 16:59:24 -0700225 u8 rx_no_pad:1;
Ilya Lesokhin6d882072017-11-13 10:22:45 +0200226
Jakub Kicinskif0aaa2c2019-06-03 15:17:04 -0700227 int (*push_pending_record)(struct sock *sk, int flags);
228 void (*sk_write_space)(struct sock *sk);
229
230 void *priv_ctx_tx;
231 void *priv_ctx_rx;
232
Maxim Mikityanskiy94ce3b62022-08-10 11:16:02 +0300233 struct net_device __rcu *netdev;
Jakub Kicinskif0aaa2c2019-06-03 15:17:04 -0700234
235 /* rw cache line */
Dave Watsondbe42552018-03-22 10:10:06 -0700236 struct cipher_context tx;
Dave Watsonc46234e2018-03-22 10:10:35 -0700237 struct cipher_context rx;
Dave Watson3c4d7552017-06-14 11:37:39 -0700238
239 struct scatterlist *partially_sent_record;
240 u16 partially_sent_offset;
Vakul Garga42055e2018-09-21 09:46:13 +0530241
David Howellse117dcf2023-05-22 13:11:17 +0100242 bool splicing_pages;
Daniel Borkmannd829e9c2018-10-13 02:45:59 +0200243 bool pending_open_record_frags;
Jakub Kicinski79ffe602019-11-05 14:24:35 -0800244
245 struct mutex tx_lock; /* protects partially_sent_* fields and
246 * per-type TX fields
247 */
Jakub Kicinskif0aaa2c2019-06-03 15:17:04 -0700248 unsigned long flags;
Dave Watson3c4d7552017-06-14 11:37:39 -0700249
Jakub Kicinskif0aaa2c2019-06-03 15:17:04 -0700250 /* cache cold stuff */
John Fastabend32857cf2019-07-19 10:29:18 -0700251 struct proto *sk_proto;
Maxim Mikityanskiyc55dcdd2021-06-01 15:08:00 +0300252 struct sock *sk;
John Fastabend32857cf2019-07-19 10:29:18 -0700253
Boris Pismenny4799ac82018-07-13 14:33:43 +0300254 void (*sk_destruct)(struct sock *sk);
Jakub Kicinskif0aaa2c2019-06-03 15:17:04 -0700255
256 union tls_crypto_context crypto_send;
257 union tls_crypto_context crypto_recv;
258
259 struct list_head list;
260 refcount_t refcount;
Jakub Kicinski15a7dea2019-08-30 12:25:47 +0200261 struct rcu_head rcu;
Dave Watson3c4d7552017-06-14 11:37:39 -0700262};
263
Jakub Kicinskida68b4a2019-04-25 12:32:03 -0700264enum tls_offload_ctx_dir {
265 TLS_OFFLOAD_CTX_DIR_RX,
266 TLS_OFFLOAD_CTX_DIR_TX,
267};
268
269struct tlsdev_ops {
270 int (*tls_dev_add)(struct net_device *netdev, struct sock *sk,
271 enum tls_offload_ctx_dir direction,
272 struct tls_crypto_info *crypto_info,
273 u32 start_offload_tcp_sn);
274 void (*tls_dev_del)(struct net_device *netdev,
275 struct tls_context *ctx,
276 enum tls_offload_ctx_dir direction);
Dirk van der Merweb5d9a832019-07-08 19:53:13 -0700277 int (*tls_dev_resync)(struct net_device *netdev,
278 struct sock *sk, u32 seq, u8 *rcd_sn,
279 enum tls_offload_ctx_dir direction);
Jakub Kicinskida68b4a2019-04-25 12:32:03 -0700280};
281
Jakub Kicinskif953d33b2019-06-10 21:40:02 -0700282enum tls_offload_sync_type {
283 TLS_OFFLOAD_SYNC_TYPE_DRIVER_REQ = 0,
284 TLS_OFFLOAD_SYNC_TYPE_CORE_NEXT_HINT = 1,
Boris Pismennyed9b7642020-06-08 19:11:38 +0300285 TLS_OFFLOAD_SYNC_TYPE_DRIVER_REQ_ASYNC = 2,
Jakub Kicinskif953d33b2019-06-10 21:40:02 -0700286};
287
288#define TLS_DEVICE_RESYNC_NH_START_IVAL 2
289#define TLS_DEVICE_RESYNC_NH_MAX_IVAL 128
290
Boris Pismennyed9b7642020-06-08 19:11:38 +0300291#define TLS_DEVICE_RESYNC_ASYNC_LOGMAX 13
292struct tls_offload_resync_async {
293 atomic64_t req;
Tariq Toukan138559b2020-11-15 15:14:48 +0200294 u16 loglen;
295 u16 rcd_delta;
Boris Pismennyed9b7642020-06-08 19:11:38 +0300296 u32 log[TLS_DEVICE_RESYNC_ASYNC_LOGMAX];
297};
298
Sabrina Dubroca9f0c8242023-10-09 22:50:54 +0200299#define TLS_DRIVER_STATE_SIZE_RX 8
Boris Pismenny4799ac82018-07-13 14:33:43 +0300300struct tls_offload_context_rx {
301 /* sw must be the first member of tls_offload_context_rx */
302 struct tls_sw_context_rx sw;
Jakub Kicinskif953d33b2019-06-10 21:40:02 -0700303 enum tls_offload_sync_type resync_type;
304 /* this member is set regardless of resync_type, to avoid branches */
305 u8 resync_nh_reset:1;
306 /* CORE_NEXT_HINT-only member, but use the hole here */
307 u8 resync_nh_do_now:1;
308 union {
309 /* TLS_OFFLOAD_SYNC_TYPE_DRIVER_REQ */
310 struct {
311 atomic64_t resync_req;
312 };
313 /* TLS_OFFLOAD_SYNC_TYPE_CORE_NEXT_HINT */
314 struct {
315 u32 decrypted_failed;
316 u32 decrypted_tgt;
317 } resync_nh;
Boris Pismennyed9b7642020-06-08 19:11:38 +0300318 /* TLS_OFFLOAD_SYNC_TYPE_DRIVER_REQ_ASYNC */
319 struct {
320 struct tls_offload_resync_async *resync_async;
321 };
Jakub Kicinskif953d33b2019-06-10 21:40:02 -0700322 };
Boris Pismenny4799ac82018-07-13 14:33:43 +0300323 /* The TLS layer reserves room for driver specific state
324 * Currently the belief is that there is not enough
325 * driver specific state to justify another layer of indirection
326 */
Sabrina Dubroca9f0c8242023-10-09 22:50:54 +0200327 u8 driver_state[TLS_DRIVER_STATE_SIZE_RX] __aligned(8);
Boris Pismenny4799ac82018-07-13 14:33:43 +0300328};
329
Boris Pismennyd80a1b9d2018-07-13 14:33:39 +0300330struct tls_record_info *tls_get_record(struct tls_offload_context_tx *context,
Ilya Lesokhine8f69792018-04-30 10:16:16 +0300331 u32 seq, u64 *p_record_sn);
332
333static inline bool tls_record_is_start_marker(struct tls_record_info *rec)
334{
335 return rec->len == 0;
336}
337
338static inline u32 tls_record_start_seq(struct tls_record_info *rec)
339{
340 return rec->end_seq - rec->len;
341}
342
Boris Pismenny4799ac82018-07-13 14:33:43 +0300343struct sk_buff *
344tls_validate_xmit_skb(struct sock *sk, struct net_device *dev,
345 struct sk_buff *skb);
Maxim Mikityanskiyc55dcdd2021-06-01 15:08:00 +0300346struct sk_buff *
347tls_validate_xmit_skb_sw(struct sock *sk, struct net_device *dev,
348 struct sk_buff *skb);
Boris Pismenny4799ac82018-07-13 14:33:43 +0300349
Jakub Kicinskied3c9a22023-06-13 13:50:06 -0700350static inline bool tls_is_skb_tx_device_offloaded(const struct sk_buff *skb)
Ilya Lesokhine8f69792018-04-30 10:16:16 +0300351{
Jakub Kicinskied3c9a22023-06-13 13:50:06 -0700352#ifdef CONFIG_TLS_DEVICE
353 struct sock *sk = skb->sk;
354
355 return sk && sk_fullsock(sk) &&
Boris Pismenny4799ac82018-07-13 14:33:43 +0300356 (smp_load_acquire(&sk->sk_validate_xmit_skb) ==
357 &tls_validate_xmit_skb);
358#else
359 return false;
360#endif
Ilya Lesokhine8f69792018-04-30 10:16:16 +0300361}
362
Vakul Garg4509de12019-02-14 07:11:35 +0000363static inline struct tls_context *tls_get_ctx(const struct sock *sk)
364{
Eric Dumazet58169ec2024-03-29 14:49:31 +0000365 const struct inet_connection_sock *icsk = inet_csk(sk);
Vakul Garg4509de12019-02-14 07:11:35 +0000366
Jakub Kicinski15a7dea2019-08-30 12:25:47 +0200367 /* Use RCU on icsk_ulp_data only for sock diag code,
368 * TLS data path doesn't need rcu_dereference().
369 */
370 return (__force void *)icsk->icsk_ulp_data;
Vakul Garg4509de12019-02-14 07:11:35 +0000371}
372
Boris Pismennyf66de3e2018-04-30 10:16:15 +0300373static inline struct tls_sw_context_rx *tls_sw_ctx_rx(
Dave Watson3c4d7552017-06-14 11:37:39 -0700374 const struct tls_context *tls_ctx)
375{
Boris Pismennyf66de3e2018-04-30 10:16:15 +0300376 return (struct tls_sw_context_rx *)tls_ctx->priv_ctx_rx;
377}
378
379static inline struct tls_sw_context_tx *tls_sw_ctx_tx(
380 const struct tls_context *tls_ctx)
381{
382 return (struct tls_sw_context_tx *)tls_ctx->priv_ctx_tx;
Dave Watson3c4d7552017-06-14 11:37:39 -0700383}
384
Boris Pismennyd80a1b9d2018-07-13 14:33:39 +0300385static inline struct tls_offload_context_tx *
386tls_offload_ctx_tx(const struct tls_context *tls_ctx)
Dave Watson3c4d7552017-06-14 11:37:39 -0700387{
Boris Pismennyd80a1b9d2018-07-13 14:33:39 +0300388 return (struct tls_offload_context_tx *)tls_ctx->priv_ctx_tx;
Dave Watson3c4d7552017-06-14 11:37:39 -0700389}
390
John Fastabend0608c692018-12-20 11:35:35 -0800391static inline bool tls_sw_has_ctx_tx(const struct sock *sk)
392{
393 struct tls_context *ctx = tls_get_ctx(sk);
394
395 if (!ctx)
396 return false;
397 return !!tls_sw_ctx_tx(ctx);
398}
399
John Fastabende91de6a2020-05-29 16:06:59 -0700400static inline bool tls_sw_has_ctx_rx(const struct sock *sk)
401{
402 struct tls_context *ctx = tls_get_ctx(sk);
403
404 if (!ctx)
405 return false;
406 return !!tls_sw_ctx_rx(ctx);
407}
408
Boris Pismenny4799ac82018-07-13 14:33:43 +0300409static inline struct tls_offload_context_rx *
410tls_offload_ctx_rx(const struct tls_context *tls_ctx)
411{
412 return (struct tls_offload_context_rx *)tls_ctx->priv_ctx_rx;
413}
414
Jakub Kicinski2e361172019-06-05 14:11:39 -0700415static inline void *__tls_driver_ctx(struct tls_context *tls_ctx,
416 enum tls_offload_ctx_dir direction)
417{
418 if (direction == TLS_OFFLOAD_CTX_DIR_TX)
419 return tls_offload_ctx_tx(tls_ctx)->driver_state;
420 else
421 return tls_offload_ctx_rx(tls_ctx)->driver_state;
422}
423
424static inline void *
425tls_driver_ctx(const struct sock *sk, enum tls_offload_ctx_dir direction)
426{
427 return __tls_driver_ctx(tls_get_ctx(sk), direction);
428}
Jakub Kicinski2e361172019-06-05 14:11:39 -0700429
Boris Pismennyed9b7642020-06-08 19:11:38 +0300430#define RESYNC_REQ BIT(0)
431#define RESYNC_REQ_ASYNC BIT(1)
Boris Pismenny4799ac82018-07-13 14:33:43 +0300432/* The TLS context is valid until sk_destruct is called */
433static inline void tls_offload_rx_resync_request(struct sock *sk, __be32 seq)
434{
435 struct tls_context *tls_ctx = tls_get_ctx(sk);
436 struct tls_offload_context_rx *rx_ctx = tls_offload_ctx_rx(tls_ctx);
437
Boris Pismennyed9b7642020-06-08 19:11:38 +0300438 atomic64_set(&rx_ctx->resync_req, ((u64)ntohl(seq) << 32) | RESYNC_REQ);
439}
440
441/* Log all TLS record header TCP sequences in [seq, seq+len] */
442static inline void
443tls_offload_rx_resync_async_request_start(struct sock *sk, __be32 seq, u16 len)
444{
445 struct tls_context *tls_ctx = tls_get_ctx(sk);
446 struct tls_offload_context_rx *rx_ctx = tls_offload_ctx_rx(tls_ctx);
447
448 atomic64_set(&rx_ctx->resync_async->req, ((u64)ntohl(seq) << 32) |
Colin Ian Kinga6ed3eb2020-06-30 15:27:46 +0100449 ((u64)len << 16) | RESYNC_REQ | RESYNC_REQ_ASYNC);
Boris Pismennyed9b7642020-06-08 19:11:38 +0300450 rx_ctx->resync_async->loglen = 0;
Tariq Toukan138559b2020-11-15 15:14:48 +0200451 rx_ctx->resync_async->rcd_delta = 0;
Boris Pismennyed9b7642020-06-08 19:11:38 +0300452}
453
454static inline void
455tls_offload_rx_resync_async_request_end(struct sock *sk, __be32 seq)
456{
457 struct tls_context *tls_ctx = tls_get_ctx(sk);
458 struct tls_offload_context_rx *rx_ctx = tls_offload_ctx_rx(tls_ctx);
459
460 atomic64_set(&rx_ctx->resync_async->req,
461 ((u64)ntohl(seq) << 32) | RESYNC_REQ);
Boris Pismenny4799ac82018-07-13 14:33:43 +0300462}
463
Jakub Kicinskif953d33b2019-06-10 21:40:02 -0700464static inline void
465tls_offload_rx_resync_set_type(struct sock *sk, enum tls_offload_sync_type type)
466{
467 struct tls_context *tls_ctx = tls_get_ctx(sk);
468
469 tls_offload_ctx_rx(tls_ctx)->resync_type = type;
470}
Boris Pismenny4799ac82018-07-13 14:33:43 +0300471
Jakub Kicinski50180072019-06-10 21:40:09 -0700472/* Driver's seq tracking has to be disabled until resync succeeded */
473static inline bool tls_offload_tx_resync_pending(struct sock *sk)
474{
475 struct tls_context *tls_ctx = tls_get_ctx(sk);
476 bool ret;
477
478 ret = test_bit(TLS_TX_SYNC_SCHED, &tls_ctx->flags);
479 smp_mb__after_atomic();
480 return ret;
481}
482
Dirk van der Merweb9727d72019-06-05 14:11:40 -0700483struct sk_buff *tls_encrypt_skb(struct sk_buff *skb);
Dave Watson3c4d7552017-06-14 11:37:39 -0700484
Jakub Kicinskibe2fbc152019-09-02 21:31:05 -0700485#ifdef CONFIG_TLS_DEVICE
Jakub Kicinski8d5a49e2019-12-17 14:12:01 -0800486void tls_device_sk_destruct(struct sock *sk);
Jakub Kicinski8538d292019-10-04 16:19:22 -0700487void tls_offload_tx_resync_request(struct sock *sk, u32 got_seq, u32 exp_seq);
Jakub Kicinski8d5a49e2019-12-17 14:12:01 -0800488
489static inline bool tls_is_sk_rx_device_offloaded(struct sock *sk)
490{
491 if (!sk_fullsock(sk) ||
492 smp_load_acquire(&sk->sk_destruct) != tls_device_sk_destruct)
493 return false;
494 return tls_get_ctx(sk)->rx_conf == TLS_HW;
495}
Jakub Kicinskibe2fbc152019-09-02 21:31:05 -0700496#endif
Dave Watson3c4d7552017-06-14 11:37:39 -0700497#endif /* _TLS_OFFLOAD_H */