1 /* 1 /*
2 * Copyright (c) 2016-2017, Mellanox Technolog 2 * Copyright (c) 2016-2017, Mellanox Technologies. All rights reserved.
3 * Copyright (c) 2016-2017, Dave Watson <davej 3 * Copyright (c) 2016-2017, Dave Watson <davejwatson@fb.com>. All rights reserved.
4 * 4 *
5 * This software is available to you under a c 5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed un 6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, ava 7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this sourc 8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below: 9 * OpenIB.org BSD license below:
10 * 10 *
11 * Redistribution and use in source and bi 11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted pro 12 * without modification, are permitted provided that the following
13 * conditions are met: 13 * conditions are met:
14 * 14 *
15 * - Redistributions of source code must 15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of condi 16 * copyright notice, this list of conditions and the following
17 * disclaimer. 17 * disclaimer.
18 * 18 *
19 * - Redistributions in binary form must 19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of condi 20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/ 21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution. 22 * provided with the distribution.
23 * 23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT W 24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMIT 25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR P 26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTH 27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER L 28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARIS 29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR 30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31 * SOFTWARE. 31 * SOFTWARE.
32 */ 32 */
33 33
34 #ifndef _TLS_OFFLOAD_H 34 #ifndef _TLS_OFFLOAD_H
35 #define _TLS_OFFLOAD_H 35 #define _TLS_OFFLOAD_H
36 36
37 #include <linux/types.h> 37 #include <linux/types.h>
38 #include <asm/byteorder.h> 38 #include <asm/byteorder.h>
39 #include <linux/crypto.h> 39 #include <linux/crypto.h>
40 #include <linux/socket.h> 40 #include <linux/socket.h>
41 #include <linux/tcp.h> 41 #include <linux/tcp.h>
>> 42 #include <linux/skmsg.h>
42 #include <linux/mutex.h> 43 #include <linux/mutex.h>
43 #include <linux/netdevice.h> 44 #include <linux/netdevice.h>
44 #include <linux/rcupdate.h> 45 #include <linux/rcupdate.h>
45 46
46 #include <net/net_namespace.h> 47 #include <net/net_namespace.h>
47 #include <net/tcp.h> 48 #include <net/tcp.h>
48 #include <net/strparser.h> 49 #include <net/strparser.h>
49 #include <crypto/aead.h> 50 #include <crypto/aead.h>
50 #include <uapi/linux/tls.h> 51 #include <uapi/linux/tls.h>
51 52
52 struct tls_rec; <<
53 53
54 /* Maximum data size carried in a TLS record * 54 /* Maximum data size carried in a TLS record */
55 #define TLS_MAX_PAYLOAD_SIZE ((size 55 #define TLS_MAX_PAYLOAD_SIZE ((size_t)1 << 14)
56 56
57 #define TLS_HEADER_SIZE 5 57 #define TLS_HEADER_SIZE 5
58 #define TLS_NONCE_OFFSET TLS_HE 58 #define TLS_NONCE_OFFSET TLS_HEADER_SIZE
59 59
60 #define TLS_CRYPTO_INFO_READY(info) ((info 60 #define TLS_CRYPTO_INFO_READY(info) ((info)->cipher_type)
61 61
>> 62 #define TLS_RECORD_TYPE_DATA 0x17
>> 63
62 #define TLS_AAD_SPACE_SIZE 13 64 #define TLS_AAD_SPACE_SIZE 13
63 65
64 #define TLS_MAX_IV_SIZE 16 !! 66 #define MAX_IV_SIZE 16
65 #define TLS_MAX_SALT_SIZE 4 <<
66 #define TLS_TAG_SIZE 16 <<
67 #define TLS_MAX_REC_SEQ_SIZE 8 67 #define TLS_MAX_REC_SEQ_SIZE 8
68 #define TLS_MAX_AAD_SIZE TLS_AA <<
69 68
70 /* For CCM mode, the full 16-bytes of IV is ma !! 69 /* For AES-CCM, the full 16-bytes of IV is made of '4' fields of given sizes.
71 * 70 *
72 * IV[16] = b0[1] || implicit nonce[4] || expl 71 * IV[16] = b0[1] || implicit nonce[4] || explicit nonce[8] || length[3]
73 * 72 *
74 * The field 'length' is encoded in field 'b0' 73 * The field 'length' is encoded in field 'b0' as '(length width - 1)'.
75 * Hence b0 contains (3 - 1) = 2. 74 * Hence b0 contains (3 - 1) = 2.
76 */ 75 */
77 #define TLS_AES_CCM_IV_B0_BYTE 2 76 #define TLS_AES_CCM_IV_B0_BYTE 2
78 #define TLS_SM4_CCM_IV_B0_BYTE 2 !! 77
>> 78 #define __TLS_INC_STATS(net, field) \
>> 79 __SNMP_INC_STATS((net)->mib.tls_statistics, field)
>> 80 #define TLS_INC_STATS(net, field) \
>> 81 SNMP_INC_STATS((net)->mib.tls_statistics, field)
>> 82 #define TLS_DEC_STATS(net, field) \
>> 83 SNMP_DEC_STATS((net)->mib.tls_statistics, field)
79 84
80 enum { 85 enum {
81 TLS_BASE, 86 TLS_BASE,
82 TLS_SW, 87 TLS_SW,
83 TLS_HW, 88 TLS_HW,
84 TLS_HW_RECORD, 89 TLS_HW_RECORD,
85 TLS_NUM_CONFIG, 90 TLS_NUM_CONFIG,
86 }; 91 };
87 92
>> 93 /* TLS records are maintained in 'struct tls_rec'. It stores the memory pages
>> 94 * allocated or mapped for each TLS record. After encryption, the records are
>> 95 * stores in a linked list.
>> 96 */
>> 97 struct tls_rec {
>> 98 struct list_head list;
>> 99 int tx_ready;
>> 100 int tx_flags;
>> 101
>> 102 struct sk_msg msg_plaintext;
>> 103 struct sk_msg msg_encrypted;
>> 104
>> 105 /* AAD | msg_plaintext.sg.data | sg_tag */
>> 106 struct scatterlist sg_aead_in[2];
>> 107 /* AAD | msg_encrypted.sg.data (data contains overhead for hdr & iv & tag) */
>> 108 struct scatterlist sg_aead_out[2];
>> 109
>> 110 char content_type;
>> 111 struct scatterlist sg_content_type;
>> 112
>> 113 char aad_space[TLS_AAD_SPACE_SIZE];
>> 114 u8 iv_data[MAX_IV_SIZE];
>> 115 struct aead_request aead_req;
>> 116 u8 aead_req_ctx[];
>> 117 };
>> 118
88 struct tx_work { 119 struct tx_work {
89 struct delayed_work work; 120 struct delayed_work work;
90 struct sock *sk; 121 struct sock *sk;
91 }; 122 };
92 123
93 struct tls_sw_context_tx { 124 struct tls_sw_context_tx {
94 struct crypto_aead *aead_send; 125 struct crypto_aead *aead_send;
95 struct crypto_wait async_wait; 126 struct crypto_wait async_wait;
96 struct tx_work tx_work; 127 struct tx_work tx_work;
97 struct tls_rec *open_rec; 128 struct tls_rec *open_rec;
98 struct list_head tx_list; 129 struct list_head tx_list;
99 atomic_t encrypt_pending; 130 atomic_t encrypt_pending;
100 u8 async_capable:1; 131 u8 async_capable:1;
101 132
102 #define BIT_TX_SCHEDULED 0 133 #define BIT_TX_SCHEDULED 0
103 #define BIT_TX_CLOSING 1 134 #define BIT_TX_CLOSING 1
104 unsigned long tx_bitmask; 135 unsigned long tx_bitmask;
105 }; 136 };
106 137
107 struct tls_strparser { <<
108 struct sock *sk; <<
109 <<
110 u32 mark : 8; <<
111 u32 stopped : 1; <<
112 u32 copy_mode : 1; <<
113 u32 mixed_decrypted : 1; <<
114 <<
115 bool msg_ready; <<
116 <<
117 struct strp_msg stm; <<
118 <<
119 struct sk_buff *anchor; <<
120 struct work_struct work; <<
121 }; <<
122 <<
123 struct tls_sw_context_rx { 138 struct tls_sw_context_rx {
124 struct crypto_aead *aead_recv; 139 struct crypto_aead *aead_recv;
125 struct crypto_wait async_wait; 140 struct crypto_wait async_wait;
>> 141 struct strparser strp;
126 struct sk_buff_head rx_list; /* lis 142 struct sk_buff_head rx_list; /* list of decrypted 'data' records */
127 void (*saved_data_ready)(struct sock * 143 void (*saved_data_ready)(struct sock *sk);
128 144
129 u8 reader_present; !! 145 struct sk_buff *recv_pkt;
130 u8 async_capable:1; 146 u8 async_capable:1;
131 u8 zc_capable:1; <<
132 u8 reader_contended:1; <<
133 <<
134 struct tls_strparser strp; <<
135 <<
136 atomic_t decrypt_pending; 147 atomic_t decrypt_pending;
137 struct sk_buff_head async_hold; <<
138 struct wait_queue_head wq; <<
139 }; 148 };
140 149
141 struct tls_record_info { 150 struct tls_record_info {
142 struct list_head list; 151 struct list_head list;
143 u32 end_seq; 152 u32 end_seq;
144 int len; 153 int len;
145 int num_frags; 154 int num_frags;
146 skb_frag_t frags[MAX_SKB_FRAGS]; 155 skb_frag_t frags[MAX_SKB_FRAGS];
147 }; 156 };
148 157
149 #define TLS_DRIVER_STATE_SIZE_TX 16 <<
150 struct tls_offload_context_tx { 158 struct tls_offload_context_tx {
151 struct crypto_aead *aead_send; 159 struct crypto_aead *aead_send;
152 spinlock_t lock; /* protects re 160 spinlock_t lock; /* protects records list */
153 struct list_head records_list; 161 struct list_head records_list;
154 struct tls_record_info *open_record; 162 struct tls_record_info *open_record;
155 struct tls_record_info *retransmit_hin 163 struct tls_record_info *retransmit_hint;
156 u64 hint_record_sn; 164 u64 hint_record_sn;
157 u64 unacked_record_sn; 165 u64 unacked_record_sn;
158 166
159 struct scatterlist sg_tx_data[MAX_SKB_ 167 struct scatterlist sg_tx_data[MAX_SKB_FRAGS];
160 void (*sk_destruct)(struct sock *sk); 168 void (*sk_destruct)(struct sock *sk);
161 struct work_struct destruct_work; 169 struct work_struct destruct_work;
162 struct tls_context *ctx; 170 struct tls_context *ctx;
>> 171 u8 driver_state[] __aligned(8);
163 /* The TLS layer reserves room for dri 172 /* The TLS layer reserves room for driver specific state
164 * Currently the belief is that there 173 * Currently the belief is that there is not enough
165 * driver specific state to justify an 174 * driver specific state to justify another layer of indirection
166 */ 175 */
167 u8 driver_state[TLS_DRIVER_STATE_SIZE_ !! 176 #define TLS_DRIVER_STATE_SIZE_TX 16
168 }; 177 };
169 178
>> 179 #define TLS_OFFLOAD_CONTEXT_SIZE_TX \
>> 180 (sizeof(struct tls_offload_context_tx) + TLS_DRIVER_STATE_SIZE_TX)
>> 181
170 enum tls_context_flags { 182 enum tls_context_flags {
171 /* tls_device_down was called after th 183 /* tls_device_down was called after the netdev went down, device state
172 * was released, and kTLS works in sof 184 * was released, and kTLS works in software, even though rx_conf is
173 * still TLS_HW (needed for transition 185 * still TLS_HW (needed for transition).
174 */ 186 */
175 TLS_RX_DEV_DEGRADED = 0, 187 TLS_RX_DEV_DEGRADED = 0,
176 /* Unlike RX where resync is driven en 188 /* Unlike RX where resync is driven entirely by the core in TX only
177 * the driver knows when things went o 189 * the driver knows when things went out of sync, so we need the flag
178 * to be atomic. 190 * to be atomic.
179 */ 191 */
180 TLS_TX_SYNC_SCHED = 1, 192 TLS_TX_SYNC_SCHED = 1,
181 /* tls_dev_del was called for the RX s 193 /* tls_dev_del was called for the RX side, device state was released,
182 * but tls_ctx->netdev might still be 194 * but tls_ctx->netdev might still be kept, because TX-side driver
183 * resources might not be released yet 195 * resources might not be released yet. Used to prevent the second
184 * tls_dev_del call in tls_device_down 196 * tls_dev_del call in tls_device_down if it happens simultaneously.
185 */ 197 */
186 TLS_RX_DEV_CLOSED = 2, 198 TLS_RX_DEV_CLOSED = 2,
187 }; 199 };
188 200
189 struct cipher_context { 201 struct cipher_context {
190 char iv[TLS_MAX_IV_SIZE + TLS_MAX_SALT !! 202 char *iv;
191 char rec_seq[TLS_MAX_REC_SEQ_SIZE]; !! 203 char *rec_seq;
192 }; 204 };
193 205
194 union tls_crypto_context { 206 union tls_crypto_context {
195 struct tls_crypto_info info; 207 struct tls_crypto_info info;
196 union { 208 union {
197 struct tls12_crypto_info_aes_g 209 struct tls12_crypto_info_aes_gcm_128 aes_gcm_128;
198 struct tls12_crypto_info_aes_g 210 struct tls12_crypto_info_aes_gcm_256 aes_gcm_256;
199 struct tls12_crypto_info_chach 211 struct tls12_crypto_info_chacha20_poly1305 chacha20_poly1305;
200 struct tls12_crypto_info_sm4_g <<
201 struct tls12_crypto_info_sm4_c <<
202 }; 212 };
203 }; 213 };
204 214
205 struct tls_prot_info { 215 struct tls_prot_info {
206 u16 version; 216 u16 version;
207 u16 cipher_type; 217 u16 cipher_type;
208 u16 prepend_size; 218 u16 prepend_size;
209 u16 tag_size; 219 u16 tag_size;
210 u16 overhead_size; 220 u16 overhead_size;
211 u16 iv_size; 221 u16 iv_size;
212 u16 salt_size; 222 u16 salt_size;
213 u16 rec_seq_size; 223 u16 rec_seq_size;
214 u16 aad_size; 224 u16 aad_size;
215 u16 tail_size; 225 u16 tail_size;
216 }; 226 };
217 227
218 struct tls_context { 228 struct tls_context {
219 /* read-only cache line */ 229 /* read-only cache line */
220 struct tls_prot_info prot_info; 230 struct tls_prot_info prot_info;
221 231
222 u8 tx_conf:3; 232 u8 tx_conf:3;
223 u8 rx_conf:3; 233 u8 rx_conf:3;
224 u8 zerocopy_sendfile:1; <<
225 u8 rx_no_pad:1; <<
226 234
227 int (*push_pending_record)(struct sock 235 int (*push_pending_record)(struct sock *sk, int flags);
228 void (*sk_write_space)(struct sock *sk 236 void (*sk_write_space)(struct sock *sk);
229 237
230 void *priv_ctx_tx; 238 void *priv_ctx_tx;
231 void *priv_ctx_rx; 239 void *priv_ctx_rx;
232 240
233 struct net_device __rcu *netdev; !! 241 struct net_device *netdev;
234 242
235 /* rw cache line */ 243 /* rw cache line */
236 struct cipher_context tx; 244 struct cipher_context tx;
237 struct cipher_context rx; 245 struct cipher_context rx;
238 246
239 struct scatterlist *partially_sent_rec 247 struct scatterlist *partially_sent_record;
240 u16 partially_sent_offset; 248 u16 partially_sent_offset;
241 249
242 bool splicing_pages; !! 250 bool in_tcp_sendpages;
243 bool pending_open_record_frags; 251 bool pending_open_record_frags;
244 252
245 struct mutex tx_lock; /* protects part 253 struct mutex tx_lock; /* protects partially_sent_* fields and
246 * per-type TX f 254 * per-type TX fields
247 */ 255 */
248 unsigned long flags; 256 unsigned long flags;
249 257
250 /* cache cold stuff */ 258 /* cache cold stuff */
251 struct proto *sk_proto; 259 struct proto *sk_proto;
252 struct sock *sk; 260 struct sock *sk;
253 261
254 void (*sk_destruct)(struct sock *sk); 262 void (*sk_destruct)(struct sock *sk);
255 263
256 union tls_crypto_context crypto_send; 264 union tls_crypto_context crypto_send;
257 union tls_crypto_context crypto_recv; 265 union tls_crypto_context crypto_recv;
258 266
259 struct list_head list; 267 struct list_head list;
260 refcount_t refcount; 268 refcount_t refcount;
261 struct rcu_head rcu; 269 struct rcu_head rcu;
262 }; 270 };
263 271
264 enum tls_offload_ctx_dir { 272 enum tls_offload_ctx_dir {
265 TLS_OFFLOAD_CTX_DIR_RX, 273 TLS_OFFLOAD_CTX_DIR_RX,
266 TLS_OFFLOAD_CTX_DIR_TX, 274 TLS_OFFLOAD_CTX_DIR_TX,
267 }; 275 };
268 276
269 struct tlsdev_ops { 277 struct tlsdev_ops {
270 int (*tls_dev_add)(struct net_device * 278 int (*tls_dev_add)(struct net_device *netdev, struct sock *sk,
271 enum tls_offload_ct 279 enum tls_offload_ctx_dir direction,
272 struct tls_crypto_i 280 struct tls_crypto_info *crypto_info,
273 u32 start_offload_t 281 u32 start_offload_tcp_sn);
274 void (*tls_dev_del)(struct net_device 282 void (*tls_dev_del)(struct net_device *netdev,
275 struct tls_context 283 struct tls_context *ctx,
276 enum tls_offload_c 284 enum tls_offload_ctx_dir direction);
277 int (*tls_dev_resync)(struct net_devic 285 int (*tls_dev_resync)(struct net_device *netdev,
278 struct sock *sk, 286 struct sock *sk, u32 seq, u8 *rcd_sn,
279 enum tls_offload 287 enum tls_offload_ctx_dir direction);
280 }; 288 };
281 289
282 enum tls_offload_sync_type { 290 enum tls_offload_sync_type {
283 TLS_OFFLOAD_SYNC_TYPE_DRIVER_REQ = 0, 291 TLS_OFFLOAD_SYNC_TYPE_DRIVER_REQ = 0,
284 TLS_OFFLOAD_SYNC_TYPE_CORE_NEXT_HINT = 292 TLS_OFFLOAD_SYNC_TYPE_CORE_NEXT_HINT = 1,
285 TLS_OFFLOAD_SYNC_TYPE_DRIVER_REQ_ASYNC 293 TLS_OFFLOAD_SYNC_TYPE_DRIVER_REQ_ASYNC = 2,
286 }; 294 };
287 295
288 #define TLS_DEVICE_RESYNC_NH_START_IVAL 296 #define TLS_DEVICE_RESYNC_NH_START_IVAL 2
289 #define TLS_DEVICE_RESYNC_NH_MAX_IVAL 297 #define TLS_DEVICE_RESYNC_NH_MAX_IVAL 128
290 298
291 #define TLS_DEVICE_RESYNC_ASYNC_LOGMAX 299 #define TLS_DEVICE_RESYNC_ASYNC_LOGMAX 13
292 struct tls_offload_resync_async { 300 struct tls_offload_resync_async {
293 atomic64_t req; 301 atomic64_t req;
294 u16 loglen; 302 u16 loglen;
295 u16 rcd_delta; 303 u16 rcd_delta;
296 u32 log[TLS_DEVICE_RESYNC_ASYNC_LOGMAX 304 u32 log[TLS_DEVICE_RESYNC_ASYNC_LOGMAX];
297 }; 305 };
298 306
299 #define TLS_DRIVER_STATE_SIZE_RX 8 <<
300 struct tls_offload_context_rx { 307 struct tls_offload_context_rx {
301 /* sw must be the first member of tls_ 308 /* sw must be the first member of tls_offload_context_rx */
302 struct tls_sw_context_rx sw; 309 struct tls_sw_context_rx sw;
303 enum tls_offload_sync_type resync_type 310 enum tls_offload_sync_type resync_type;
304 /* this member is set regardless of re 311 /* this member is set regardless of resync_type, to avoid branches */
305 u8 resync_nh_reset:1; 312 u8 resync_nh_reset:1;
306 /* CORE_NEXT_HINT-only member, but use 313 /* CORE_NEXT_HINT-only member, but use the hole here */
307 u8 resync_nh_do_now:1; 314 u8 resync_nh_do_now:1;
308 union { 315 union {
309 /* TLS_OFFLOAD_SYNC_TYPE_DRIVE 316 /* TLS_OFFLOAD_SYNC_TYPE_DRIVER_REQ */
310 struct { 317 struct {
311 atomic64_t resync_req; 318 atomic64_t resync_req;
312 }; 319 };
313 /* TLS_OFFLOAD_SYNC_TYPE_CORE_ 320 /* TLS_OFFLOAD_SYNC_TYPE_CORE_NEXT_HINT */
314 struct { 321 struct {
315 u32 decrypted_failed; 322 u32 decrypted_failed;
316 u32 decrypted_tgt; 323 u32 decrypted_tgt;
317 } resync_nh; 324 } resync_nh;
318 /* TLS_OFFLOAD_SYNC_TYPE_DRIVE 325 /* TLS_OFFLOAD_SYNC_TYPE_DRIVER_REQ_ASYNC */
319 struct { 326 struct {
320 struct tls_offload_res 327 struct tls_offload_resync_async *resync_async;
321 }; 328 };
322 }; 329 };
>> 330 u8 driver_state[] __aligned(8);
323 /* The TLS layer reserves room for dri 331 /* The TLS layer reserves room for driver specific state
324 * Currently the belief is that there 332 * Currently the belief is that there is not enough
325 * driver specific state to justify an 333 * driver specific state to justify another layer of indirection
326 */ 334 */
327 u8 driver_state[TLS_DRIVER_STATE_SIZE_ !! 335 #define TLS_DRIVER_STATE_SIZE_RX 8
328 }; 336 };
329 337
>> 338 #define TLS_OFFLOAD_CONTEXT_SIZE_RX \
>> 339 (sizeof(struct tls_offload_context_rx) + TLS_DRIVER_STATE_SIZE_RX)
>> 340
>> 341 struct tls_context *tls_ctx_create(struct sock *sk);
>> 342 void tls_ctx_free(struct sock *sk, struct tls_context *ctx);
>> 343 void update_sk_prot(struct sock *sk, struct tls_context *ctx);
>> 344
>> 345 int wait_on_pending_writer(struct sock *sk, long *timeo);
>> 346 int tls_sk_query(struct sock *sk, int optname, char __user *optval,
>> 347 int __user *optlen);
>> 348 int tls_sk_attach(struct sock *sk, int optname, char __user *optval,
>> 349 unsigned int optlen);
>> 350 void tls_err_abort(struct sock *sk, int err);
>> 351
>> 352 int tls_set_sw_offload(struct sock *sk, struct tls_context *ctx, int tx);
>> 353 void tls_sw_strparser_arm(struct sock *sk, struct tls_context *ctx);
>> 354 void tls_sw_strparser_done(struct tls_context *tls_ctx);
>> 355 int tls_sw_sendmsg(struct sock *sk, struct msghdr *msg, size_t size);
>> 356 int tls_sw_sendpage_locked(struct sock *sk, struct page *page,
>> 357 int offset, size_t size, int flags);
>> 358 int tls_sw_sendpage(struct sock *sk, struct page *page,
>> 359 int offset, size_t size, int flags);
>> 360 void tls_sw_cancel_work_tx(struct tls_context *tls_ctx);
>> 361 void tls_sw_release_resources_tx(struct sock *sk);
>> 362 void tls_sw_free_ctx_tx(struct tls_context *tls_ctx);
>> 363 void tls_sw_free_resources_rx(struct sock *sk);
>> 364 void tls_sw_release_resources_rx(struct sock *sk);
>> 365 void tls_sw_free_ctx_rx(struct tls_context *tls_ctx);
>> 366 int tls_sw_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
>> 367 int nonblock, int flags, int *addr_len);
>> 368 bool tls_sw_sock_is_readable(struct sock *sk);
>> 369 ssize_t tls_sw_splice_read(struct socket *sock, loff_t *ppos,
>> 370 struct pipe_inode_info *pipe,
>> 371 size_t len, unsigned int flags);
>> 372
>> 373 int tls_device_sendmsg(struct sock *sk, struct msghdr *msg, size_t size);
>> 374 int tls_device_sendpage(struct sock *sk, struct page *page,
>> 375 int offset, size_t size, int flags);
>> 376 int tls_tx_records(struct sock *sk, int flags);
>> 377
330 struct tls_record_info *tls_get_record(struct 378 struct tls_record_info *tls_get_record(struct tls_offload_context_tx *context,
331 u32 seq 379 u32 seq, u64 *p_record_sn);
332 380
333 static inline bool tls_record_is_start_marker( 381 static inline bool tls_record_is_start_marker(struct tls_record_info *rec)
334 { 382 {
335 return rec->len == 0; 383 return rec->len == 0;
336 } 384 }
337 385
338 static inline u32 tls_record_start_seq(struct 386 static inline u32 tls_record_start_seq(struct tls_record_info *rec)
339 { 387 {
340 return rec->end_seq - rec->len; 388 return rec->end_seq - rec->len;
341 } 389 }
342 390
>> 391 int tls_push_sg(struct sock *sk, struct tls_context *ctx,
>> 392 struct scatterlist *sg, u16 first_offset,
>> 393 int flags);
>> 394 int tls_push_partial_record(struct sock *sk, struct tls_context *ctx,
>> 395 int flags);
>> 396 void tls_free_partial_record(struct sock *sk, struct tls_context *ctx);
>> 397
>> 398 static inline struct tls_msg *tls_msg(struct sk_buff *skb)
>> 399 {
>> 400 struct sk_skb_cb *scb = (struct sk_skb_cb *)skb->cb;
>> 401
>> 402 return &scb->tls;
>> 403 }
>> 404
>> 405 static inline bool tls_is_partially_sent_record(struct tls_context *ctx)
>> 406 {
>> 407 return !!ctx->partially_sent_record;
>> 408 }
>> 409
>> 410 static inline bool tls_is_pending_open_record(struct tls_context *tls_ctx)
>> 411 {
>> 412 return tls_ctx->pending_open_record_frags;
>> 413 }
>> 414
>> 415 static inline bool is_tx_ready(struct tls_sw_context_tx *ctx)
>> 416 {
>> 417 struct tls_rec *rec;
>> 418
>> 419 rec = list_first_entry(&ctx->tx_list, struct tls_rec, list);
>> 420 if (!rec)
>> 421 return false;
>> 422
>> 423 return READ_ONCE(rec->tx_ready);
>> 424 }
>> 425
>> 426 static inline u16 tls_user_config(struct tls_context *ctx, bool tx)
>> 427 {
>> 428 u16 config = tx ? ctx->tx_conf : ctx->rx_conf;
>> 429
>> 430 switch (config) {
>> 431 case TLS_BASE:
>> 432 return TLS_CONF_BASE;
>> 433 case TLS_SW:
>> 434 return TLS_CONF_SW;
>> 435 case TLS_HW:
>> 436 return TLS_CONF_HW;
>> 437 case TLS_HW_RECORD:
>> 438 return TLS_CONF_HW_RECORD;
>> 439 }
>> 440 return 0;
>> 441 }
>> 442
343 struct sk_buff * 443 struct sk_buff *
344 tls_validate_xmit_skb(struct sock *sk, struct 444 tls_validate_xmit_skb(struct sock *sk, struct net_device *dev,
345 struct sk_buff *skb); 445 struct sk_buff *skb);
346 struct sk_buff * 446 struct sk_buff *
347 tls_validate_xmit_skb_sw(struct sock *sk, stru 447 tls_validate_xmit_skb_sw(struct sock *sk, struct net_device *dev,
348 struct sk_buff *skb); 448 struct sk_buff *skb);
349 449
350 static inline bool tls_is_skb_tx_device_offloa !! 450 static inline bool tls_is_sk_tx_device_offloaded(struct sock *sk)
351 { 451 {
352 #ifdef CONFIG_TLS_DEVICE !! 452 #ifdef CONFIG_SOCK_VALIDATE_XMIT
353 struct sock *sk = skb->sk; !! 453 return sk_fullsock(sk) &&
354 <<
355 return sk && sk_fullsock(sk) && <<
356 (smp_load_acquire(&sk->sk_valid 454 (smp_load_acquire(&sk->sk_validate_xmit_skb) ==
357 &tls_validate_xmit_skb); 455 &tls_validate_xmit_skb);
358 #else 456 #else
359 return false; 457 return false;
360 #endif 458 #endif
361 } 459 }
362 460
>> 461 static inline bool tls_bigint_increment(unsigned char *seq, int len)
>> 462 {
>> 463 int i;
>> 464
>> 465 for (i = len - 1; i >= 0; i--) {
>> 466 ++seq[i];
>> 467 if (seq[i] != 0)
>> 468 break;
>> 469 }
>> 470
>> 471 return (i == -1);
>> 472 }
>> 473
>> 474 static inline void tls_bigint_subtract(unsigned char *seq, int n)
>> 475 {
>> 476 u64 rcd_sn;
>> 477 __be64 *p;
>> 478
>> 479 BUILD_BUG_ON(TLS_MAX_REC_SEQ_SIZE != 8);
>> 480
>> 481 p = (__be64 *)seq;
>> 482 rcd_sn = be64_to_cpu(*p);
>> 483 *p = cpu_to_be64(rcd_sn - n);
>> 484 }
>> 485
363 static inline struct tls_context *tls_get_ctx( 486 static inline struct tls_context *tls_get_ctx(const struct sock *sk)
364 { 487 {
365 const struct inet_connection_sock *ics !! 488 struct inet_connection_sock *icsk = inet_csk(sk);
366 489
367 /* Use RCU on icsk_ulp_data only for s 490 /* Use RCU on icsk_ulp_data only for sock diag code,
368 * TLS data path doesn't need rcu_dere 491 * TLS data path doesn't need rcu_dereference().
369 */ 492 */
370 return (__force void *)icsk->icsk_ulp_ 493 return (__force void *)icsk->icsk_ulp_data;
371 } 494 }
372 495
>> 496 static inline void tls_advance_record_sn(struct sock *sk,
>> 497 struct tls_prot_info *prot,
>> 498 struct cipher_context *ctx)
>> 499 {
>> 500 if (tls_bigint_increment(ctx->rec_seq, prot->rec_seq_size))
>> 501 tls_err_abort(sk, -EBADMSG);
>> 502
>> 503 if (prot->version != TLS_1_3_VERSION &&
>> 504 prot->cipher_type != TLS_CIPHER_CHACHA20_POLY1305)
>> 505 tls_bigint_increment(ctx->iv + prot->salt_size,
>> 506 prot->iv_size);
>> 507 }
>> 508
>> 509 static inline void tls_fill_prepend(struct tls_context *ctx,
>> 510 char *buf,
>> 511 size_t plaintext_len,
>> 512 unsigned char record_type)
>> 513 {
>> 514 struct tls_prot_info *prot = &ctx->prot_info;
>> 515 size_t pkt_len, iv_size = prot->iv_size;
>> 516
>> 517 pkt_len = plaintext_len + prot->tag_size;
>> 518 if (prot->version != TLS_1_3_VERSION &&
>> 519 prot->cipher_type != TLS_CIPHER_CHACHA20_POLY1305) {
>> 520 pkt_len += iv_size;
>> 521
>> 522 memcpy(buf + TLS_NONCE_OFFSET,
>> 523 ctx->tx.iv + prot->salt_size, iv_size);
>> 524 }
>> 525
>> 526 /* we cover nonce explicit here as well, so buf should be of
>> 527 * size KTLS_DTLS_HEADER_SIZE + KTLS_DTLS_NONCE_EXPLICIT_SIZE
>> 528 */
>> 529 buf[0] = prot->version == TLS_1_3_VERSION ?
>> 530 TLS_RECORD_TYPE_DATA : record_type;
>> 531 /* Note that VERSION must be TLS_1_2 for both TLS1.2 and TLS1.3 */
>> 532 buf[1] = TLS_1_2_VERSION_MINOR;
>> 533 buf[2] = TLS_1_2_VERSION_MAJOR;
>> 534 /* we can use IV for nonce explicit according to spec */
>> 535 buf[3] = pkt_len >> 8;
>> 536 buf[4] = pkt_len & 0xFF;
>> 537 }
>> 538
>> 539 static inline void tls_make_aad(char *buf,
>> 540 size_t size,
>> 541 char *record_sequence,
>> 542 unsigned char record_type,
>> 543 struct tls_prot_info *prot)
>> 544 {
>> 545 if (prot->version != TLS_1_3_VERSION) {
>> 546 memcpy(buf, record_sequence, prot->rec_seq_size);
>> 547 buf += 8;
>> 548 } else {
>> 549 size += prot->tag_size;
>> 550 }
>> 551
>> 552 buf[0] = prot->version == TLS_1_3_VERSION ?
>> 553 TLS_RECORD_TYPE_DATA : record_type;
>> 554 buf[1] = TLS_1_2_VERSION_MAJOR;
>> 555 buf[2] = TLS_1_2_VERSION_MINOR;
>> 556 buf[3] = size >> 8;
>> 557 buf[4] = size & 0xFF;
>> 558 }
>> 559
>> 560 static inline void xor_iv_with_seq(struct tls_prot_info *prot, char *iv, char *seq)
>> 561 {
>> 562 int i;
>> 563
>> 564 if (prot->version == TLS_1_3_VERSION ||
>> 565 prot->cipher_type == TLS_CIPHER_CHACHA20_POLY1305) {
>> 566 for (i = 0; i < 8; i++)
>> 567 iv[i + 4] ^= seq[i];
>> 568 }
>> 569 }
>> 570
>> 571
373 static inline struct tls_sw_context_rx *tls_sw 572 static inline struct tls_sw_context_rx *tls_sw_ctx_rx(
374 const struct tls_context *tls_ 573 const struct tls_context *tls_ctx)
375 { 574 {
376 return (struct tls_sw_context_rx *)tls 575 return (struct tls_sw_context_rx *)tls_ctx->priv_ctx_rx;
377 } 576 }
378 577
379 static inline struct tls_sw_context_tx *tls_sw 578 static inline struct tls_sw_context_tx *tls_sw_ctx_tx(
380 const struct tls_context *tls_ 579 const struct tls_context *tls_ctx)
381 { 580 {
382 return (struct tls_sw_context_tx *)tls 581 return (struct tls_sw_context_tx *)tls_ctx->priv_ctx_tx;
383 } 582 }
384 583
385 static inline struct tls_offload_context_tx * 584 static inline struct tls_offload_context_tx *
386 tls_offload_ctx_tx(const struct tls_context *t 585 tls_offload_ctx_tx(const struct tls_context *tls_ctx)
387 { 586 {
388 return (struct tls_offload_context_tx 587 return (struct tls_offload_context_tx *)tls_ctx->priv_ctx_tx;
389 } 588 }
390 589
391 static inline bool tls_sw_has_ctx_tx(const str 590 static inline bool tls_sw_has_ctx_tx(const struct sock *sk)
392 { 591 {
393 struct tls_context *ctx = tls_get_ctx( 592 struct tls_context *ctx = tls_get_ctx(sk);
394 593
395 if (!ctx) 594 if (!ctx)
396 return false; 595 return false;
397 return !!tls_sw_ctx_tx(ctx); 596 return !!tls_sw_ctx_tx(ctx);
398 } 597 }
399 598
400 static inline bool tls_sw_has_ctx_rx(const str 599 static inline bool tls_sw_has_ctx_rx(const struct sock *sk)
401 { 600 {
402 struct tls_context *ctx = tls_get_ctx( 601 struct tls_context *ctx = tls_get_ctx(sk);
403 602
404 if (!ctx) 603 if (!ctx)
405 return false; 604 return false;
406 return !!tls_sw_ctx_rx(ctx); 605 return !!tls_sw_ctx_rx(ctx);
407 } 606 }
408 607
>> 608 void tls_sw_write_space(struct sock *sk, struct tls_context *ctx);
>> 609 void tls_device_write_space(struct sock *sk, struct tls_context *ctx);
>> 610
409 static inline struct tls_offload_context_rx * 611 static inline struct tls_offload_context_rx *
410 tls_offload_ctx_rx(const struct tls_context *t 612 tls_offload_ctx_rx(const struct tls_context *tls_ctx)
411 { 613 {
412 return (struct tls_offload_context_rx 614 return (struct tls_offload_context_rx *)tls_ctx->priv_ctx_rx;
413 } 615 }
414 616
>> 617 #if IS_ENABLED(CONFIG_TLS_DEVICE)
415 static inline void *__tls_driver_ctx(struct tl 618 static inline void *__tls_driver_ctx(struct tls_context *tls_ctx,
416 enum tls_ 619 enum tls_offload_ctx_dir direction)
417 { 620 {
418 if (direction == TLS_OFFLOAD_CTX_DIR_T 621 if (direction == TLS_OFFLOAD_CTX_DIR_TX)
419 return tls_offload_ctx_tx(tls_ 622 return tls_offload_ctx_tx(tls_ctx)->driver_state;
420 else 623 else
421 return tls_offload_ctx_rx(tls_ 624 return tls_offload_ctx_rx(tls_ctx)->driver_state;
422 } 625 }
423 626
424 static inline void * 627 static inline void *
425 tls_driver_ctx(const struct sock *sk, enum tls 628 tls_driver_ctx(const struct sock *sk, enum tls_offload_ctx_dir direction)
426 { 629 {
427 return __tls_driver_ctx(tls_get_ctx(sk 630 return __tls_driver_ctx(tls_get_ctx(sk), direction);
428 } 631 }
>> 632 #endif
429 633
430 #define RESYNC_REQ BIT(0) 634 #define RESYNC_REQ BIT(0)
431 #define RESYNC_REQ_ASYNC BIT(1) 635 #define RESYNC_REQ_ASYNC BIT(1)
432 /* The TLS context is valid until sk_destruct 636 /* The TLS context is valid until sk_destruct is called */
433 static inline void tls_offload_rx_resync_reque 637 static inline void tls_offload_rx_resync_request(struct sock *sk, __be32 seq)
434 { 638 {
435 struct tls_context *tls_ctx = tls_get_ 639 struct tls_context *tls_ctx = tls_get_ctx(sk);
436 struct tls_offload_context_rx *rx_ctx 640 struct tls_offload_context_rx *rx_ctx = tls_offload_ctx_rx(tls_ctx);
437 641
438 atomic64_set(&rx_ctx->resync_req, ((u6 642 atomic64_set(&rx_ctx->resync_req, ((u64)ntohl(seq) << 32) | RESYNC_REQ);
439 } 643 }
440 644
441 /* Log all TLS record header TCP sequences in 645 /* Log all TLS record header TCP sequences in [seq, seq+len] */
442 static inline void 646 static inline void
443 tls_offload_rx_resync_async_request_start(stru 647 tls_offload_rx_resync_async_request_start(struct sock *sk, __be32 seq, u16 len)
444 { 648 {
445 struct tls_context *tls_ctx = tls_get_ 649 struct tls_context *tls_ctx = tls_get_ctx(sk);
446 struct tls_offload_context_rx *rx_ctx 650 struct tls_offload_context_rx *rx_ctx = tls_offload_ctx_rx(tls_ctx);
447 651
448 atomic64_set(&rx_ctx->resync_async->re 652 atomic64_set(&rx_ctx->resync_async->req, ((u64)ntohl(seq) << 32) |
449 ((u64)len << 16) | RESYNC 653 ((u64)len << 16) | RESYNC_REQ | RESYNC_REQ_ASYNC);
450 rx_ctx->resync_async->loglen = 0; 654 rx_ctx->resync_async->loglen = 0;
451 rx_ctx->resync_async->rcd_delta = 0; 655 rx_ctx->resync_async->rcd_delta = 0;
452 } 656 }
453 657
454 static inline void 658 static inline void
455 tls_offload_rx_resync_async_request_end(struct 659 tls_offload_rx_resync_async_request_end(struct sock *sk, __be32 seq)
456 { 660 {
457 struct tls_context *tls_ctx = tls_get_ 661 struct tls_context *tls_ctx = tls_get_ctx(sk);
458 struct tls_offload_context_rx *rx_ctx 662 struct tls_offload_context_rx *rx_ctx = tls_offload_ctx_rx(tls_ctx);
459 663
460 atomic64_set(&rx_ctx->resync_async->re 664 atomic64_set(&rx_ctx->resync_async->req,
461 ((u64)ntohl(seq) << 32) | 665 ((u64)ntohl(seq) << 32) | RESYNC_REQ);
462 } 666 }
463 667
464 static inline void 668 static inline void
465 tls_offload_rx_resync_set_type(struct sock *sk 669 tls_offload_rx_resync_set_type(struct sock *sk, enum tls_offload_sync_type type)
466 { 670 {
467 struct tls_context *tls_ctx = tls_get_ 671 struct tls_context *tls_ctx = tls_get_ctx(sk);
468 672
469 tls_offload_ctx_rx(tls_ctx)->resync_ty 673 tls_offload_ctx_rx(tls_ctx)->resync_type = type;
470 } 674 }
471 675
472 /* Driver's seq tracking has to be disabled un 676 /* Driver's seq tracking has to be disabled until resync succeeded */
473 static inline bool tls_offload_tx_resync_pendi 677 static inline bool tls_offload_tx_resync_pending(struct sock *sk)
474 { 678 {
475 struct tls_context *tls_ctx = tls_get_ 679 struct tls_context *tls_ctx = tls_get_ctx(sk);
476 bool ret; 680 bool ret;
477 681
478 ret = test_bit(TLS_TX_SYNC_SCHED, &tls 682 ret = test_bit(TLS_TX_SYNC_SCHED, &tls_ctx->flags);
479 smp_mb__after_atomic(); 683 smp_mb__after_atomic();
480 return ret; 684 return ret;
481 } 685 }
482 686
>> 687 int __net_init tls_proc_init(struct net *net);
>> 688 void __net_exit tls_proc_fini(struct net *net);
>> 689
>> 690 int tls_proccess_cmsg(struct sock *sk, struct msghdr *msg,
>> 691 unsigned char *record_type);
>> 692 int decrypt_skb(struct sock *sk, struct sk_buff *skb,
>> 693 struct scatterlist *sgout);
483 struct sk_buff *tls_encrypt_skb(struct sk_buff 694 struct sk_buff *tls_encrypt_skb(struct sk_buff *skb);
484 695
>> 696 int tls_sw_fallback_init(struct sock *sk,
>> 697 struct tls_offload_context_tx *offload_ctx,
>> 698 struct tls_crypto_info *crypto_info);
>> 699
485 #ifdef CONFIG_TLS_DEVICE 700 #ifdef CONFIG_TLS_DEVICE
>> 701 int tls_device_init(void);
>> 702 void tls_device_cleanup(void);
486 void tls_device_sk_destruct(struct sock *sk); 703 void tls_device_sk_destruct(struct sock *sk);
>> 704 int tls_set_device_offload(struct sock *sk, struct tls_context *ctx);
>> 705 void tls_device_free_resources_tx(struct sock *sk);
>> 706 int tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx);
>> 707 void tls_device_offload_cleanup_rx(struct sock *sk);
>> 708 void tls_device_rx_resync_new_rec(struct sock *sk, u32 rcd_len, u32 seq);
487 void tls_offload_tx_resync_request(struct sock 709 void tls_offload_tx_resync_request(struct sock *sk, u32 got_seq, u32 exp_seq);
>> 710 int tls_device_decrypted(struct sock *sk, struct tls_context *tls_ctx,
>> 711 struct sk_buff *skb, struct strp_msg *rxm);
488 712
489 static inline bool tls_is_sk_rx_device_offload 713 static inline bool tls_is_sk_rx_device_offloaded(struct sock *sk)
490 { 714 {
491 if (!sk_fullsock(sk) || 715 if (!sk_fullsock(sk) ||
492 smp_load_acquire(&sk->sk_destruct) 716 smp_load_acquire(&sk->sk_destruct) != tls_device_sk_destruct)
493 return false; 717 return false;
494 return tls_get_ctx(sk)->rx_conf == TLS 718 return tls_get_ctx(sk)->rx_conf == TLS_HW;
>> 719 }
>> 720 #else
>> 721 static inline int tls_device_init(void) { return 0; }
>> 722 static inline void tls_device_cleanup(void) {}
>> 723
>> 724 static inline int
>> 725 tls_set_device_offload(struct sock *sk, struct tls_context *ctx)
>> 726 {
>> 727 return -EOPNOTSUPP;
>> 728 }
>> 729
>> 730 static inline void tls_device_free_resources_tx(struct sock *sk) {}
>> 731
>> 732 static inline int
>> 733 tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx)
>> 734 {
>> 735 return -EOPNOTSUPP;
>> 736 }
>> 737
>> 738 static inline void tls_device_offload_cleanup_rx(struct sock *sk) {}
>> 739 static inline void
>> 740 tls_device_rx_resync_new_rec(struct sock *sk, u32 rcd_len, u32 seq) {}
>> 741
>> 742 static inline int
>> 743 tls_device_decrypted(struct sock *sk, struct tls_context *tls_ctx,
>> 744 struct sk_buff *skb, struct strp_msg *rxm)
>> 745 {
>> 746 return 0;
495 } 747 }
496 #endif 748 #endif
497 #endif /* _TLS_OFFLOAD_H */ 749 #endif /* _TLS_OFFLOAD_H */
498 750
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.