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)
>> 84 #define TLS_DEC_STATS(net, field) \
>> 85 SNMP_DEC_STATS((net)->mib.tls_statistics, field)
79 86
80 enum { 87 enum {
81 TLS_BASE, 88 TLS_BASE,
82 TLS_SW, 89 TLS_SW,
83 TLS_HW, 90 TLS_HW,
84 TLS_HW_RECORD, 91 TLS_HW_RECORD,
85 TLS_NUM_CONFIG, 92 TLS_NUM_CONFIG,
86 }; 93 };
87 94
>> 95 /* TLS records are maintained in 'struct tls_rec'. It stores the memory pages
>> 96 * allocated or mapped for each TLS record. After encryption, the records are
>> 97 * stores in a linked list.
>> 98 */
>> 99 struct tls_rec {
>> 100 struct list_head list;
>> 101 int tx_ready;
>> 102 int tx_flags;
>> 103
>> 104 struct sk_msg msg_plaintext;
>> 105 struct sk_msg msg_encrypted;
>> 106
>> 107 /* AAD | msg_plaintext.sg.data | sg_tag */
>> 108 struct scatterlist sg_aead_in[2];
>> 109 /* AAD | msg_encrypted.sg.data (data contains overhead for hdr & iv & tag) */
>> 110 struct scatterlist sg_aead_out[2];
>> 111
>> 112 char content_type;
>> 113 struct scatterlist sg_content_type;
>> 114
>> 115 char aad_space[TLS_AAD_SPACE_SIZE];
>> 116 u8 iv_data[MAX_IV_SIZE];
>> 117 struct aead_request aead_req;
>> 118 u8 aead_req_ctx[];
>> 119 };
>> 120
>> 121 struct tls_msg {
>> 122 struct strp_msg rxm;
>> 123 u8 control;
>> 124 };
>> 125
88 struct tx_work { 126 struct tx_work {
89 struct delayed_work work; 127 struct delayed_work work;
90 struct sock *sk; 128 struct sock *sk;
91 }; 129 };
92 130
93 struct tls_sw_context_tx { 131 struct tls_sw_context_tx {
94 struct crypto_aead *aead_send; 132 struct crypto_aead *aead_send;
95 struct crypto_wait async_wait; 133 struct crypto_wait async_wait;
96 struct tx_work tx_work; 134 struct tx_work tx_work;
97 struct tls_rec *open_rec; 135 struct tls_rec *open_rec;
98 struct list_head tx_list; 136 struct list_head tx_list;
99 atomic_t encrypt_pending; 137 atomic_t encrypt_pending;
>> 138 /* protect crypto_wait with encrypt_pending */
>> 139 spinlock_t encrypt_compl_lock;
>> 140 int async_notify;
100 u8 async_capable:1; 141 u8 async_capable:1;
101 142
102 #define BIT_TX_SCHEDULED 0 143 #define BIT_TX_SCHEDULED 0
103 #define BIT_TX_CLOSING 1 144 #define BIT_TX_CLOSING 1
104 unsigned long tx_bitmask; 145 unsigned long tx_bitmask;
105 }; 146 };
106 147
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 { 148 struct tls_sw_context_rx {
124 struct crypto_aead *aead_recv; 149 struct crypto_aead *aead_recv;
125 struct crypto_wait async_wait; 150 struct crypto_wait async_wait;
>> 151 struct strparser strp;
126 struct sk_buff_head rx_list; /* lis 152 struct sk_buff_head rx_list; /* list of decrypted 'data' records */
127 void (*saved_data_ready)(struct sock * 153 void (*saved_data_ready)(struct sock *sk);
128 154
129 u8 reader_present; !! 155 struct sk_buff *recv_pkt;
>> 156 u8 control;
130 u8 async_capable:1; 157 u8 async_capable:1;
131 u8 zc_capable:1; !! 158 u8 decrypted:1;
132 u8 reader_contended:1; <<
133 <<
134 struct tls_strparser strp; <<
135 <<
136 atomic_t decrypt_pending; 159 atomic_t decrypt_pending;
137 struct sk_buff_head async_hold; !! 160 /* protect crypto_wait with decrypt_pending*/
138 struct wait_queue_head wq; !! 161 spinlock_t decrypt_compl_lock;
>> 162 bool async_notify;
139 }; 163 };
140 164
141 struct tls_record_info { 165 struct tls_record_info {
142 struct list_head list; 166 struct list_head list;
143 u32 end_seq; 167 u32 end_seq;
144 int len; 168 int len;
145 int num_frags; 169 int num_frags;
146 skb_frag_t frags[MAX_SKB_FRAGS]; 170 skb_frag_t frags[MAX_SKB_FRAGS];
147 }; 171 };
148 172
149 #define TLS_DRIVER_STATE_SIZE_TX 16 <<
150 struct tls_offload_context_tx { 173 struct tls_offload_context_tx {
151 struct crypto_aead *aead_send; 174 struct crypto_aead *aead_send;
152 spinlock_t lock; /* protects re 175 spinlock_t lock; /* protects records list */
153 struct list_head records_list; 176 struct list_head records_list;
154 struct tls_record_info *open_record; 177 struct tls_record_info *open_record;
155 struct tls_record_info *retransmit_hin 178 struct tls_record_info *retransmit_hint;
156 u64 hint_record_sn; 179 u64 hint_record_sn;
157 u64 unacked_record_sn; 180 u64 unacked_record_sn;
158 181
159 struct scatterlist sg_tx_data[MAX_SKB_ 182 struct scatterlist sg_tx_data[MAX_SKB_FRAGS];
160 void (*sk_destruct)(struct sock *sk); 183 void (*sk_destruct)(struct sock *sk);
161 struct work_struct destruct_work; !! 184 u8 driver_state[] __aligned(8);
162 struct tls_context *ctx; <<
163 /* The TLS layer reserves room for dri 185 /* The TLS layer reserves room for driver specific state
164 * Currently the belief is that there 186 * Currently the belief is that there is not enough
165 * driver specific state to justify an 187 * driver specific state to justify another layer of indirection
166 */ 188 */
167 u8 driver_state[TLS_DRIVER_STATE_SIZE_ !! 189 #define TLS_DRIVER_STATE_SIZE_TX 16
168 }; 190 };
169 191
>> 192 #define TLS_OFFLOAD_CONTEXT_SIZE_TX \
>> 193 (sizeof(struct tls_offload_context_tx) + TLS_DRIVER_STATE_SIZE_TX)
>> 194
170 enum tls_context_flags { 195 enum tls_context_flags {
171 /* tls_device_down was called after th !! 196 TLS_RX_SYNC_RUNNING = 0,
172 * was released, and kTLS works in sof <<
173 * still TLS_HW (needed for transition <<
174 */ <<
175 TLS_RX_DEV_DEGRADED = 0, <<
176 /* Unlike RX where resync is driven en 197 /* Unlike RX where resync is driven entirely by the core in TX only
177 * the driver knows when things went o 198 * the driver knows when things went out of sync, so we need the flag
178 * to be atomic. 199 * to be atomic.
179 */ 200 */
180 TLS_TX_SYNC_SCHED = 1, 201 TLS_TX_SYNC_SCHED = 1,
181 /* tls_dev_del was called for the RX s <<
182 * but tls_ctx->netdev might still be <<
183 * resources might not be released yet <<
184 * tls_dev_del call in tls_device_down <<
185 */ <<
186 TLS_RX_DEV_CLOSED = 2, <<
187 }; 202 };
188 203
189 struct cipher_context { 204 struct cipher_context {
190 char iv[TLS_MAX_IV_SIZE + TLS_MAX_SALT !! 205 char *iv;
191 char rec_seq[TLS_MAX_REC_SEQ_SIZE]; !! 206 char *rec_seq;
192 }; 207 };
193 208
194 union tls_crypto_context { 209 union tls_crypto_context {
195 struct tls_crypto_info info; 210 struct tls_crypto_info info;
196 union { 211 union {
197 struct tls12_crypto_info_aes_g 212 struct tls12_crypto_info_aes_gcm_128 aes_gcm_128;
198 struct tls12_crypto_info_aes_g 213 struct tls12_crypto_info_aes_gcm_256 aes_gcm_256;
199 struct tls12_crypto_info_chach <<
200 struct tls12_crypto_info_sm4_g <<
201 struct tls12_crypto_info_sm4_c <<
202 }; 214 };
203 }; 215 };
204 216
205 struct tls_prot_info { 217 struct tls_prot_info {
206 u16 version; 218 u16 version;
207 u16 cipher_type; 219 u16 cipher_type;
208 u16 prepend_size; 220 u16 prepend_size;
209 u16 tag_size; 221 u16 tag_size;
210 u16 overhead_size; 222 u16 overhead_size;
211 u16 iv_size; 223 u16 iv_size;
212 u16 salt_size; 224 u16 salt_size;
213 u16 rec_seq_size; 225 u16 rec_seq_size;
214 u16 aad_size; 226 u16 aad_size;
215 u16 tail_size; 227 u16 tail_size;
216 }; 228 };
217 229
218 struct tls_context { 230 struct tls_context {
219 /* read-only cache line */ 231 /* read-only cache line */
220 struct tls_prot_info prot_info; 232 struct tls_prot_info prot_info;
221 233
222 u8 tx_conf:3; 234 u8 tx_conf:3;
223 u8 rx_conf:3; 235 u8 rx_conf:3;
224 u8 zerocopy_sendfile:1; <<
225 u8 rx_no_pad:1; <<
226 236
227 int (*push_pending_record)(struct sock 237 int (*push_pending_record)(struct sock *sk, int flags);
228 void (*sk_write_space)(struct sock *sk 238 void (*sk_write_space)(struct sock *sk);
229 239
230 void *priv_ctx_tx; 240 void *priv_ctx_tx;
231 void *priv_ctx_rx; 241 void *priv_ctx_rx;
232 242
233 struct net_device __rcu *netdev; !! 243 struct net_device *netdev;
234 244
235 /* rw cache line */ 245 /* rw cache line */
236 struct cipher_context tx; 246 struct cipher_context tx;
237 struct cipher_context rx; 247 struct cipher_context rx;
238 248
239 struct scatterlist *partially_sent_rec 249 struct scatterlist *partially_sent_record;
240 u16 partially_sent_offset; 250 u16 partially_sent_offset;
241 251
242 bool splicing_pages; !! 252 bool in_tcp_sendpages;
243 bool pending_open_record_frags; 253 bool pending_open_record_frags;
244 254
245 struct mutex tx_lock; /* protects part 255 struct mutex tx_lock; /* protects partially_sent_* fields and
246 * per-type TX f 256 * per-type TX fields
247 */ 257 */
248 unsigned long flags; 258 unsigned long flags;
249 259
250 /* cache cold stuff */ 260 /* cache cold stuff */
251 struct proto *sk_proto; 261 struct proto *sk_proto;
252 struct sock *sk; <<
253 262
254 void (*sk_destruct)(struct sock *sk); 263 void (*sk_destruct)(struct sock *sk);
255 264
256 union tls_crypto_context crypto_send; 265 union tls_crypto_context crypto_send;
257 union tls_crypto_context crypto_recv; 266 union tls_crypto_context crypto_recv;
258 267
259 struct list_head list; 268 struct list_head list;
260 refcount_t refcount; 269 refcount_t refcount;
261 struct rcu_head rcu; 270 struct rcu_head rcu;
262 }; 271 };
263 272
264 enum tls_offload_ctx_dir { 273 enum tls_offload_ctx_dir {
265 TLS_OFFLOAD_CTX_DIR_RX, 274 TLS_OFFLOAD_CTX_DIR_RX,
266 TLS_OFFLOAD_CTX_DIR_TX, 275 TLS_OFFLOAD_CTX_DIR_TX,
267 }; 276 };
268 277
269 struct tlsdev_ops { 278 struct tlsdev_ops {
270 int (*tls_dev_add)(struct net_device * 279 int (*tls_dev_add)(struct net_device *netdev, struct sock *sk,
271 enum tls_offload_ct 280 enum tls_offload_ctx_dir direction,
272 struct tls_crypto_i 281 struct tls_crypto_info *crypto_info,
273 u32 start_offload_t 282 u32 start_offload_tcp_sn);
274 void (*tls_dev_del)(struct net_device 283 void (*tls_dev_del)(struct net_device *netdev,
275 struct tls_context 284 struct tls_context *ctx,
276 enum tls_offload_c 285 enum tls_offload_ctx_dir direction);
277 int (*tls_dev_resync)(struct net_devic 286 int (*tls_dev_resync)(struct net_device *netdev,
278 struct sock *sk, 287 struct sock *sk, u32 seq, u8 *rcd_sn,
279 enum tls_offload 288 enum tls_offload_ctx_dir direction);
280 }; 289 };
281 290
282 enum tls_offload_sync_type { 291 enum tls_offload_sync_type {
283 TLS_OFFLOAD_SYNC_TYPE_DRIVER_REQ = 0, 292 TLS_OFFLOAD_SYNC_TYPE_DRIVER_REQ = 0,
284 TLS_OFFLOAD_SYNC_TYPE_CORE_NEXT_HINT = 293 TLS_OFFLOAD_SYNC_TYPE_CORE_NEXT_HINT = 1,
285 TLS_OFFLOAD_SYNC_TYPE_DRIVER_REQ_ASYNC <<
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 <<
292 struct tls_offload_resync_async { <<
293 atomic64_t req; <<
294 u16 loglen; <<
295 u16 rcd_delta; <<
296 u32 log[TLS_DEVICE_RESYNC_ASYNC_LOGMAX <<
297 }; <<
298 <<
299 #define TLS_DRIVER_STATE_SIZE_RX 8 <<
300 struct tls_offload_context_rx { 299 struct tls_offload_context_rx {
301 /* sw must be the first member of tls_ 300 /* sw must be the first member of tls_offload_context_rx */
302 struct tls_sw_context_rx sw; 301 struct tls_sw_context_rx sw;
303 enum tls_offload_sync_type resync_type 302 enum tls_offload_sync_type resync_type;
304 /* this member is set regardless of re 303 /* this member is set regardless of resync_type, to avoid branches */
305 u8 resync_nh_reset:1; 304 u8 resync_nh_reset:1;
306 /* CORE_NEXT_HINT-only member, but use 305 /* CORE_NEXT_HINT-only member, but use the hole here */
307 u8 resync_nh_do_now:1; 306 u8 resync_nh_do_now:1;
308 union { 307 union {
309 /* TLS_OFFLOAD_SYNC_TYPE_DRIVE 308 /* TLS_OFFLOAD_SYNC_TYPE_DRIVER_REQ */
310 struct { 309 struct {
311 atomic64_t resync_req; 310 atomic64_t resync_req;
312 }; 311 };
313 /* TLS_OFFLOAD_SYNC_TYPE_CORE_ 312 /* TLS_OFFLOAD_SYNC_TYPE_CORE_NEXT_HINT */
314 struct { 313 struct {
315 u32 decrypted_failed; 314 u32 decrypted_failed;
316 u32 decrypted_tgt; 315 u32 decrypted_tgt;
317 } resync_nh; 316 } resync_nh;
318 /* TLS_OFFLOAD_SYNC_TYPE_DRIVE <<
319 struct { <<
320 struct tls_offload_res <<
321 }; <<
322 }; 317 };
>> 318 u8 driver_state[] __aligned(8);
323 /* The TLS layer reserves room for dri 319 /* The TLS layer reserves room for driver specific state
324 * Currently the belief is that there 320 * Currently the belief is that there is not enough
325 * driver specific state to justify an 321 * driver specific state to justify another layer of indirection
326 */ 322 */
327 u8 driver_state[TLS_DRIVER_STATE_SIZE_ !! 323 #define TLS_DRIVER_STATE_SIZE_RX 8
328 }; 324 };
329 325
>> 326 #define TLS_OFFLOAD_CONTEXT_SIZE_RX \
>> 327 (sizeof(struct tls_offload_context_rx) + TLS_DRIVER_STATE_SIZE_RX)
>> 328
>> 329 struct tls_context *tls_ctx_create(struct sock *sk);
>> 330 void tls_ctx_free(struct sock *sk, struct tls_context *ctx);
>> 331 void update_sk_prot(struct sock *sk, struct tls_context *ctx);
>> 332
>> 333 int wait_on_pending_writer(struct sock *sk, long *timeo);
>> 334 int tls_sk_query(struct sock *sk, int optname, char __user *optval,
>> 335 int __user *optlen);
>> 336 int tls_sk_attach(struct sock *sk, int optname, char __user *optval,
>> 337 unsigned int optlen);
>> 338
>> 339 int tls_set_sw_offload(struct sock *sk, struct tls_context *ctx, int tx);
>> 340 void tls_sw_strparser_arm(struct sock *sk, struct tls_context *ctx);
>> 341 void tls_sw_strparser_done(struct tls_context *tls_ctx);
>> 342 int tls_sw_sendmsg(struct sock *sk, struct msghdr *msg, size_t size);
>> 343 int tls_sw_sendpage_locked(struct sock *sk, struct page *page,
>> 344 int offset, size_t size, int flags);
>> 345 int tls_sw_sendpage(struct sock *sk, struct page *page,
>> 346 int offset, size_t size, int flags);
>> 347 void tls_sw_cancel_work_tx(struct tls_context *tls_ctx);
>> 348 void tls_sw_release_resources_tx(struct sock *sk);
>> 349 void tls_sw_free_ctx_tx(struct tls_context *tls_ctx);
>> 350 void tls_sw_free_resources_rx(struct sock *sk);
>> 351 void tls_sw_release_resources_rx(struct sock *sk);
>> 352 void tls_sw_free_ctx_rx(struct tls_context *tls_ctx);
>> 353 int tls_sw_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
>> 354 int nonblock, int flags, int *addr_len);
>> 355 bool tls_sw_stream_read(const struct sock *sk);
>> 356 ssize_t tls_sw_splice_read(struct socket *sock, loff_t *ppos,
>> 357 struct pipe_inode_info *pipe,
>> 358 size_t len, unsigned int flags);
>> 359
>> 360 int tls_device_sendmsg(struct sock *sk, struct msghdr *msg, size_t size);
>> 361 int tls_device_sendpage(struct sock *sk, struct page *page,
>> 362 int offset, size_t size, int flags);
>> 363 int tls_tx_records(struct sock *sk, int flags);
>> 364
330 struct tls_record_info *tls_get_record(struct 365 struct tls_record_info *tls_get_record(struct tls_offload_context_tx *context,
331 u32 seq 366 u32 seq, u64 *p_record_sn);
332 367
333 static inline bool tls_record_is_start_marker( 368 static inline bool tls_record_is_start_marker(struct tls_record_info *rec)
334 { 369 {
335 return rec->len == 0; 370 return rec->len == 0;
336 } 371 }
337 372
338 static inline u32 tls_record_start_seq(struct 373 static inline u32 tls_record_start_seq(struct tls_record_info *rec)
339 { 374 {
340 return rec->end_seq - rec->len; 375 return rec->end_seq - rec->len;
341 } 376 }
342 377
>> 378 int tls_push_sg(struct sock *sk, struct tls_context *ctx,
>> 379 struct scatterlist *sg, u16 first_offset,
>> 380 int flags);
>> 381 int tls_push_partial_record(struct sock *sk, struct tls_context *ctx,
>> 382 int flags);
>> 383 void tls_free_partial_record(struct sock *sk, struct tls_context *ctx);
>> 384
>> 385 static inline struct tls_msg *tls_msg(struct sk_buff *skb)
>> 386 {
>> 387 return (struct tls_msg *)strp_msg(skb);
>> 388 }
>> 389
>> 390 static inline bool tls_is_partially_sent_record(struct tls_context *ctx)
>> 391 {
>> 392 return !!ctx->partially_sent_record;
>> 393 }
>> 394
>> 395 static inline bool tls_is_pending_open_record(struct tls_context *tls_ctx)
>> 396 {
>> 397 return tls_ctx->pending_open_record_frags;
>> 398 }
>> 399
>> 400 static inline bool is_tx_ready(struct tls_sw_context_tx *ctx)
>> 401 {
>> 402 struct tls_rec *rec;
>> 403
>> 404 rec = list_first_entry(&ctx->tx_list, struct tls_rec, list);
>> 405 if (!rec)
>> 406 return false;
>> 407
>> 408 return READ_ONCE(rec->tx_ready);
>> 409 }
>> 410
>> 411 static inline u16 tls_user_config(struct tls_context *ctx, bool tx)
>> 412 {
>> 413 u16 config = tx ? ctx->tx_conf : ctx->rx_conf;
>> 414
>> 415 switch (config) {
>> 416 case TLS_BASE:
>> 417 return TLS_CONF_BASE;
>> 418 case TLS_SW:
>> 419 return TLS_CONF_SW;
>> 420 case TLS_HW:
>> 421 return TLS_CONF_HW;
>> 422 case TLS_HW_RECORD:
>> 423 return TLS_CONF_HW_RECORD;
>> 424 }
>> 425 return 0;
>> 426 }
>> 427
343 struct sk_buff * 428 struct sk_buff *
344 tls_validate_xmit_skb(struct sock *sk, struct 429 tls_validate_xmit_skb(struct sock *sk, struct net_device *dev,
345 struct sk_buff *skb); 430 struct sk_buff *skb);
346 struct sk_buff * <<
347 tls_validate_xmit_skb_sw(struct sock *sk, stru <<
348 struct sk_buff *skb); <<
349 431
350 static inline bool tls_is_skb_tx_device_offloa !! 432 static inline bool tls_is_sk_tx_device_offloaded(struct sock *sk)
351 { 433 {
352 #ifdef CONFIG_TLS_DEVICE !! 434 #ifdef CONFIG_SOCK_VALIDATE_XMIT
353 struct sock *sk = skb->sk; !! 435 return sk_fullsock(sk) &&
354 <<
355 return sk && sk_fullsock(sk) && <<
356 (smp_load_acquire(&sk->sk_valid 436 (smp_load_acquire(&sk->sk_validate_xmit_skb) ==
357 &tls_validate_xmit_skb); 437 &tls_validate_xmit_skb);
358 #else 438 #else
359 return false; 439 return false;
360 #endif 440 #endif
361 } 441 }
362 442
>> 443 static inline void tls_err_abort(struct sock *sk, int err)
>> 444 {
>> 445 sk->sk_err = err;
>> 446 sk->sk_error_report(sk);
>> 447 }
>> 448
>> 449 static inline bool tls_bigint_increment(unsigned char *seq, int len)
>> 450 {
>> 451 int i;
>> 452
>> 453 for (i = len - 1; i >= 0; i--) {
>> 454 ++seq[i];
>> 455 if (seq[i] != 0)
>> 456 break;
>> 457 }
>> 458
>> 459 return (i == -1);
>> 460 }
>> 461
363 static inline struct tls_context *tls_get_ctx( 462 static inline struct tls_context *tls_get_ctx(const struct sock *sk)
364 { 463 {
365 const struct inet_connection_sock *ics !! 464 struct inet_connection_sock *icsk = inet_csk(sk);
366 465
367 /* Use RCU on icsk_ulp_data only for s 466 /* Use RCU on icsk_ulp_data only for sock diag code,
368 * TLS data path doesn't need rcu_dere 467 * TLS data path doesn't need rcu_dereference().
369 */ 468 */
370 return (__force void *)icsk->icsk_ulp_ 469 return (__force void *)icsk->icsk_ulp_data;
371 } 470 }
372 471
>> 472 static inline void tls_advance_record_sn(struct sock *sk,
>> 473 struct tls_prot_info *prot,
>> 474 struct cipher_context *ctx)
>> 475 {
>> 476 if (tls_bigint_increment(ctx->rec_seq, prot->rec_seq_size))
>> 477 tls_err_abort(sk, EBADMSG);
>> 478
>> 479 if (prot->version != TLS_1_3_VERSION)
>> 480 tls_bigint_increment(ctx->iv + TLS_CIPHER_AES_GCM_128_SALT_SIZE,
>> 481 prot->iv_size);
>> 482 }
>> 483
>> 484 static inline void tls_fill_prepend(struct tls_context *ctx,
>> 485 char *buf,
>> 486 size_t plaintext_len,
>> 487 unsigned char record_type,
>> 488 int version)
>> 489 {
>> 490 struct tls_prot_info *prot = &ctx->prot_info;
>> 491 size_t pkt_len, iv_size = prot->iv_size;
>> 492
>> 493 pkt_len = plaintext_len + prot->tag_size;
>> 494 if (version != TLS_1_3_VERSION) {
>> 495 pkt_len += iv_size;
>> 496
>> 497 memcpy(buf + TLS_NONCE_OFFSET,
>> 498 ctx->tx.iv + TLS_CIPHER_AES_GCM_128_SALT_SIZE, iv_size);
>> 499 }
>> 500
>> 501 /* we cover nonce explicit here as well, so buf should be of
>> 502 * size KTLS_DTLS_HEADER_SIZE + KTLS_DTLS_NONCE_EXPLICIT_SIZE
>> 503 */
>> 504 buf[0] = version == TLS_1_3_VERSION ?
>> 505 TLS_RECORD_TYPE_DATA : record_type;
>> 506 /* Note that VERSION must be TLS_1_2 for both TLS1.2 and TLS1.3 */
>> 507 buf[1] = TLS_1_2_VERSION_MINOR;
>> 508 buf[2] = TLS_1_2_VERSION_MAJOR;
>> 509 /* we can use IV for nonce explicit according to spec */
>> 510 buf[3] = pkt_len >> 8;
>> 511 buf[4] = pkt_len & 0xFF;
>> 512 }
>> 513
>> 514 static inline void tls_make_aad(char *buf,
>> 515 size_t size,
>> 516 char *record_sequence,
>> 517 int record_sequence_size,
>> 518 unsigned char record_type,
>> 519 int version)
>> 520 {
>> 521 if (version != TLS_1_3_VERSION) {
>> 522 memcpy(buf, record_sequence, record_sequence_size);
>> 523 buf += 8;
>> 524 } else {
>> 525 size += TLS_CIPHER_AES_GCM_128_TAG_SIZE;
>> 526 }
>> 527
>> 528 buf[0] = version == TLS_1_3_VERSION ?
>> 529 TLS_RECORD_TYPE_DATA : record_type;
>> 530 buf[1] = TLS_1_2_VERSION_MAJOR;
>> 531 buf[2] = TLS_1_2_VERSION_MINOR;
>> 532 buf[3] = size >> 8;
>> 533 buf[4] = size & 0xFF;
>> 534 }
>> 535
>> 536 static inline void xor_iv_with_seq(int version, char *iv, char *seq)
>> 537 {
>> 538 int i;
>> 539
>> 540 if (version == TLS_1_3_VERSION) {
>> 541 for (i = 0; i < 8; i++)
>> 542 iv[i + 4] ^= seq[i];
>> 543 }
>> 544 }
>> 545
>> 546
373 static inline struct tls_sw_context_rx *tls_sw 547 static inline struct tls_sw_context_rx *tls_sw_ctx_rx(
374 const struct tls_context *tls_ 548 const struct tls_context *tls_ctx)
375 { 549 {
376 return (struct tls_sw_context_rx *)tls 550 return (struct tls_sw_context_rx *)tls_ctx->priv_ctx_rx;
377 } 551 }
378 552
379 static inline struct tls_sw_context_tx *tls_sw 553 static inline struct tls_sw_context_tx *tls_sw_ctx_tx(
380 const struct tls_context *tls_ 554 const struct tls_context *tls_ctx)
381 { 555 {
382 return (struct tls_sw_context_tx *)tls 556 return (struct tls_sw_context_tx *)tls_ctx->priv_ctx_tx;
383 } 557 }
384 558
385 static inline struct tls_offload_context_tx * 559 static inline struct tls_offload_context_tx *
386 tls_offload_ctx_tx(const struct tls_context *t 560 tls_offload_ctx_tx(const struct tls_context *tls_ctx)
387 { 561 {
388 return (struct tls_offload_context_tx 562 return (struct tls_offload_context_tx *)tls_ctx->priv_ctx_tx;
389 } 563 }
390 564
391 static inline bool tls_sw_has_ctx_tx(const str 565 static inline bool tls_sw_has_ctx_tx(const struct sock *sk)
392 { 566 {
393 struct tls_context *ctx = tls_get_ctx( 567 struct tls_context *ctx = tls_get_ctx(sk);
394 568
395 if (!ctx) 569 if (!ctx)
396 return false; 570 return false;
397 return !!tls_sw_ctx_tx(ctx); 571 return !!tls_sw_ctx_tx(ctx);
398 } 572 }
399 573
400 static inline bool tls_sw_has_ctx_rx(const str 574 static inline bool tls_sw_has_ctx_rx(const struct sock *sk)
401 { 575 {
402 struct tls_context *ctx = tls_get_ctx( 576 struct tls_context *ctx = tls_get_ctx(sk);
403 577
404 if (!ctx) 578 if (!ctx)
405 return false; 579 return false;
406 return !!tls_sw_ctx_rx(ctx); 580 return !!tls_sw_ctx_rx(ctx);
407 } 581 }
408 582
>> 583 void tls_sw_write_space(struct sock *sk, struct tls_context *ctx);
>> 584 void tls_device_write_space(struct sock *sk, struct tls_context *ctx);
>> 585
409 static inline struct tls_offload_context_rx * 586 static inline struct tls_offload_context_rx *
410 tls_offload_ctx_rx(const struct tls_context *t 587 tls_offload_ctx_rx(const struct tls_context *tls_ctx)
411 { 588 {
412 return (struct tls_offload_context_rx 589 return (struct tls_offload_context_rx *)tls_ctx->priv_ctx_rx;
413 } 590 }
414 591
>> 592 #if IS_ENABLED(CONFIG_TLS_DEVICE)
415 static inline void *__tls_driver_ctx(struct tl 593 static inline void *__tls_driver_ctx(struct tls_context *tls_ctx,
416 enum tls_ 594 enum tls_offload_ctx_dir direction)
417 { 595 {
418 if (direction == TLS_OFFLOAD_CTX_DIR_T 596 if (direction == TLS_OFFLOAD_CTX_DIR_TX)
419 return tls_offload_ctx_tx(tls_ 597 return tls_offload_ctx_tx(tls_ctx)->driver_state;
420 else 598 else
421 return tls_offload_ctx_rx(tls_ 599 return tls_offload_ctx_rx(tls_ctx)->driver_state;
422 } 600 }
423 601
424 static inline void * 602 static inline void *
425 tls_driver_ctx(const struct sock *sk, enum tls 603 tls_driver_ctx(const struct sock *sk, enum tls_offload_ctx_dir direction)
426 { 604 {
427 return __tls_driver_ctx(tls_get_ctx(sk 605 return __tls_driver_ctx(tls_get_ctx(sk), direction);
428 } 606 }
>> 607 #endif
429 608
430 #define RESYNC_REQ BIT(0) <<
431 #define RESYNC_REQ_ASYNC BIT(1) <<
432 /* The TLS context is valid until sk_destruct 609 /* The TLS context is valid until sk_destruct is called */
>> 610 #define RESYNC_REQ (1 << 0)
>> 611 #define RESYNC_REQ_FORCE (1 << 1)
433 static inline void tls_offload_rx_resync_reque 612 static inline void tls_offload_rx_resync_request(struct sock *sk, __be32 seq)
434 { 613 {
435 struct tls_context *tls_ctx = tls_get_ 614 struct tls_context *tls_ctx = tls_get_ctx(sk);
436 struct tls_offload_context_rx *rx_ctx 615 struct tls_offload_context_rx *rx_ctx = tls_offload_ctx_rx(tls_ctx);
437 616
438 atomic64_set(&rx_ctx->resync_req, ((u6 617 atomic64_set(&rx_ctx->resync_req, ((u64)ntohl(seq) << 32) | RESYNC_REQ);
439 } 618 }
440 619
441 /* Log all TLS record header TCP sequences in !! 620 static inline void tls_offload_rx_force_resync_request(struct sock *sk)
442 static inline void <<
443 tls_offload_rx_resync_async_request_start(stru <<
444 { 621 {
445 struct tls_context *tls_ctx = tls_get_ 622 struct tls_context *tls_ctx = tls_get_ctx(sk);
446 struct tls_offload_context_rx *rx_ctx 623 struct tls_offload_context_rx *rx_ctx = tls_offload_ctx_rx(tls_ctx);
447 624
448 atomic64_set(&rx_ctx->resync_async->re !! 625 atomic64_set(&rx_ctx->resync_req, RESYNC_REQ | RESYNC_REQ_FORCE);
449 ((u64)len << 16) | RESYNC <<
450 rx_ctx->resync_async->loglen = 0; <<
451 rx_ctx->resync_async->rcd_delta = 0; <<
452 } <<
453 <<
454 static inline void <<
455 tls_offload_rx_resync_async_request_end(struct <<
456 { <<
457 struct tls_context *tls_ctx = tls_get_ <<
458 struct tls_offload_context_rx *rx_ctx <<
459 <<
460 atomic64_set(&rx_ctx->resync_async->re <<
461 ((u64)ntohl(seq) << 32) | <<
462 } 626 }
463 627
464 static inline void 628 static inline void
465 tls_offload_rx_resync_set_type(struct sock *sk 629 tls_offload_rx_resync_set_type(struct sock *sk, enum tls_offload_sync_type type)
466 { 630 {
467 struct tls_context *tls_ctx = tls_get_ 631 struct tls_context *tls_ctx = tls_get_ctx(sk);
468 632
469 tls_offload_ctx_rx(tls_ctx)->resync_ty 633 tls_offload_ctx_rx(tls_ctx)->resync_type = type;
470 } 634 }
471 635
472 /* Driver's seq tracking has to be disabled un 636 /* Driver's seq tracking has to be disabled until resync succeeded */
473 static inline bool tls_offload_tx_resync_pendi 637 static inline bool tls_offload_tx_resync_pending(struct sock *sk)
474 { 638 {
475 struct tls_context *tls_ctx = tls_get_ 639 struct tls_context *tls_ctx = tls_get_ctx(sk);
476 bool ret; 640 bool ret;
477 641
478 ret = test_bit(TLS_TX_SYNC_SCHED, &tls 642 ret = test_bit(TLS_TX_SYNC_SCHED, &tls_ctx->flags);
479 smp_mb__after_atomic(); 643 smp_mb__after_atomic();
480 return ret; 644 return ret;
481 } 645 }
482 646
>> 647 int __net_init tls_proc_init(struct net *net);
>> 648 void __net_exit tls_proc_fini(struct net *net);
>> 649
>> 650 int tls_proccess_cmsg(struct sock *sk, struct msghdr *msg,
>> 651 unsigned char *record_type);
>> 652 int decrypt_skb(struct sock *sk, struct sk_buff *skb,
>> 653 struct scatterlist *sgout);
483 struct sk_buff *tls_encrypt_skb(struct sk_buff 654 struct sk_buff *tls_encrypt_skb(struct sk_buff *skb);
484 655
>> 656 struct sk_buff *tls_validate_xmit_skb(struct sock *sk,
>> 657 struct net_device *dev,
>> 658 struct sk_buff *skb);
>> 659
>> 660 int tls_sw_fallback_init(struct sock *sk,
>> 661 struct tls_offload_context_tx *offload_ctx,
>> 662 struct tls_crypto_info *crypto_info);
>> 663
485 #ifdef CONFIG_TLS_DEVICE 664 #ifdef CONFIG_TLS_DEVICE
>> 665 void tls_device_init(void);
>> 666 void tls_device_cleanup(void);
486 void tls_device_sk_destruct(struct sock *sk); 667 void tls_device_sk_destruct(struct sock *sk);
>> 668 int tls_set_device_offload(struct sock *sk, struct tls_context *ctx);
>> 669 void tls_device_free_resources_tx(struct sock *sk);
>> 670 int tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx);
>> 671 void tls_device_offload_cleanup_rx(struct sock *sk);
>> 672 void tls_device_rx_resync_new_rec(struct sock *sk, u32 rcd_len, u32 seq);
487 void tls_offload_tx_resync_request(struct sock 673 void tls_offload_tx_resync_request(struct sock *sk, u32 got_seq, u32 exp_seq);
>> 674 int tls_device_decrypted(struct sock *sk, struct tls_context *tls_ctx,
>> 675 struct sk_buff *skb, struct strp_msg *rxm);
488 676
489 static inline bool tls_is_sk_rx_device_offload 677 static inline bool tls_is_sk_rx_device_offloaded(struct sock *sk)
490 { 678 {
491 if (!sk_fullsock(sk) || 679 if (!sk_fullsock(sk) ||
492 smp_load_acquire(&sk->sk_destruct) 680 smp_load_acquire(&sk->sk_destruct) != tls_device_sk_destruct)
493 return false; 681 return false;
494 return tls_get_ctx(sk)->rx_conf == TLS 682 return tls_get_ctx(sk)->rx_conf == TLS_HW;
>> 683 }
>> 684 #else
>> 685 static inline void tls_device_init(void) {}
>> 686 static inline void tls_device_cleanup(void) {}
>> 687
>> 688 static inline int
>> 689 tls_set_device_offload(struct sock *sk, struct tls_context *ctx)
>> 690 {
>> 691 return -EOPNOTSUPP;
>> 692 }
>> 693
>> 694 static inline void tls_device_free_resources_tx(struct sock *sk) {}
>> 695
>> 696 static inline int
>> 697 tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx)
>> 698 {
>> 699 return -EOPNOTSUPP;
>> 700 }
>> 701
>> 702 static inline void tls_device_offload_cleanup_rx(struct sock *sk) {}
>> 703 static inline void
>> 704 tls_device_rx_resync_new_rec(struct sock *sk, u32 rcd_len, u32 seq) {}
>> 705
>> 706 static inline int
>> 707 tls_device_decrypted(struct sock *sk, struct tls_context *tls_ctx,
>> 708 struct sk_buff *skb, struct strp_msg *rxm)
>> 709 {
>> 710 return 0;
495 } 711 }
496 #endif 712 #endif
497 #endif /* _TLS_OFFLOAD_H */ 713 #endif /* _TLS_OFFLOAD_H */
498 714
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