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cd1a677c ID |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* | |
3 | * Ceph msgr2 protocol implementation | |
4 | * | |
5 | * Copyright (C) 2020 Ilya Dryomov <idryomov@gmail.com> | |
6 | */ | |
7 | ||
8 | #include <linux/ceph/ceph_debug.h> | |
9 | ||
10 | #include <crypto/aead.h> | |
11 | #include <crypto/algapi.h> /* for crypto_memneq() */ | |
12 | #include <crypto/hash.h> | |
be695ee2 | 13 | #include <crypto/sha2.h> |
cd1a677c ID |
14 | #include <linux/bvec.h> |
15 | #include <linux/crc32c.h> | |
16 | #include <linux/net.h> | |
17 | #include <linux/scatterlist.h> | |
18 | #include <linux/socket.h> | |
19 | #include <linux/sched/mm.h> | |
20 | #include <net/sock.h> | |
21 | #include <net/tcp.h> | |
22 | ||
23 | #include <linux/ceph/ceph_features.h> | |
24 | #include <linux/ceph/decode.h> | |
25 | #include <linux/ceph/libceph.h> | |
26 | #include <linux/ceph/messenger.h> | |
27 | ||
28 | #include "crypto.h" /* for CEPH_KEY_LEN and CEPH_MAX_CON_SECRET_LEN */ | |
29 | ||
30 | #define FRAME_TAG_HELLO 1 | |
31 | #define FRAME_TAG_AUTH_REQUEST 2 | |
32 | #define FRAME_TAG_AUTH_BAD_METHOD 3 | |
33 | #define FRAME_TAG_AUTH_REPLY_MORE 4 | |
34 | #define FRAME_TAG_AUTH_REQUEST_MORE 5 | |
35 | #define FRAME_TAG_AUTH_DONE 6 | |
36 | #define FRAME_TAG_AUTH_SIGNATURE 7 | |
37 | #define FRAME_TAG_CLIENT_IDENT 8 | |
38 | #define FRAME_TAG_SERVER_IDENT 9 | |
39 | #define FRAME_TAG_IDENT_MISSING_FEATURES 10 | |
40 | #define FRAME_TAG_SESSION_RECONNECT 11 | |
41 | #define FRAME_TAG_SESSION_RESET 12 | |
42 | #define FRAME_TAG_SESSION_RETRY 13 | |
43 | #define FRAME_TAG_SESSION_RETRY_GLOBAL 14 | |
44 | #define FRAME_TAG_SESSION_RECONNECT_OK 15 | |
45 | #define FRAME_TAG_WAIT 16 | |
46 | #define FRAME_TAG_MESSAGE 17 | |
47 | #define FRAME_TAG_KEEPALIVE2 18 | |
48 | #define FRAME_TAG_KEEPALIVE2_ACK 19 | |
49 | #define FRAME_TAG_ACK 20 | |
50 | ||
51 | #define FRAME_LATE_STATUS_ABORTED 0x1 | |
52 | #define FRAME_LATE_STATUS_COMPLETE 0xe | |
53 | #define FRAME_LATE_STATUS_ABORTED_MASK 0xf | |
54 | ||
55 | #define IN_S_HANDLE_PREAMBLE 1 | |
56 | #define IN_S_HANDLE_CONTROL 2 | |
57 | #define IN_S_HANDLE_CONTROL_REMAINDER 3 | |
58 | #define IN_S_PREPARE_READ_DATA 4 | |
59 | #define IN_S_PREPARE_READ_DATA_CONT 5 | |
60 | #define IN_S_HANDLE_EPILOGUE 6 | |
61 | #define IN_S_FINISH_SKIP 7 | |
62 | ||
63 | #define OUT_S_QUEUE_DATA 1 | |
64 | #define OUT_S_QUEUE_DATA_CONT 2 | |
65 | #define OUT_S_QUEUE_ENC_PAGE 3 | |
66 | #define OUT_S_QUEUE_ZEROS 4 | |
67 | #define OUT_S_FINISH_MESSAGE 5 | |
68 | #define OUT_S_GET_NEXT 6 | |
69 | ||
70 | #define CTRL_BODY(p) ((void *)(p) + CEPH_PREAMBLE_LEN) | |
71 | #define FRONT_PAD(p) ((void *)(p) + CEPH_EPILOGUE_SECURE_LEN) | |
72 | #define MIDDLE_PAD(p) (FRONT_PAD(p) + CEPH_GCM_BLOCK_LEN) | |
73 | #define DATA_PAD(p) (MIDDLE_PAD(p) + CEPH_GCM_BLOCK_LEN) | |
74 | ||
75 | #define CEPH_MSG_FLAGS (MSG_DONTWAIT | MSG_NOSIGNAL) | |
76 | ||
77 | static int do_recvmsg(struct socket *sock, struct iov_iter *it) | |
78 | { | |
79 | struct msghdr msg = { .msg_flags = CEPH_MSG_FLAGS }; | |
80 | int ret; | |
81 | ||
82 | msg.msg_iter = *it; | |
83 | while (iov_iter_count(it)) { | |
84 | ret = sock_recvmsg(sock, &msg, msg.msg_flags); | |
85 | if (ret <= 0) { | |
86 | if (ret == -EAGAIN) | |
87 | ret = 0; | |
88 | return ret; | |
89 | } | |
90 | ||
91 | iov_iter_advance(it, ret); | |
92 | } | |
93 | ||
94 | WARN_ON(msg_data_left(&msg)); | |
95 | return 1; | |
96 | } | |
97 | ||
98 | /* | |
99 | * Read as much as possible. | |
100 | * | |
101 | * Return: | |
102 | * 1 - done, nothing (else) to read | |
103 | * 0 - socket is empty, need to wait | |
104 | * <0 - error | |
105 | */ | |
106 | static int ceph_tcp_recv(struct ceph_connection *con) | |
107 | { | |
108 | int ret; | |
109 | ||
110 | dout("%s con %p %s %zu\n", __func__, con, | |
111 | iov_iter_is_discard(&con->v2.in_iter) ? "discard" : "need", | |
112 | iov_iter_count(&con->v2.in_iter)); | |
113 | ret = do_recvmsg(con->sock, &con->v2.in_iter); | |
114 | dout("%s con %p ret %d left %zu\n", __func__, con, ret, | |
115 | iov_iter_count(&con->v2.in_iter)); | |
116 | return ret; | |
117 | } | |
118 | ||
119 | static int do_sendmsg(struct socket *sock, struct iov_iter *it) | |
120 | { | |
121 | struct msghdr msg = { .msg_flags = CEPH_MSG_FLAGS }; | |
122 | int ret; | |
123 | ||
124 | msg.msg_iter = *it; | |
125 | while (iov_iter_count(it)) { | |
126 | ret = sock_sendmsg(sock, &msg); | |
127 | if (ret <= 0) { | |
128 | if (ret == -EAGAIN) | |
129 | ret = 0; | |
130 | return ret; | |
131 | } | |
132 | ||
133 | iov_iter_advance(it, ret); | |
134 | } | |
135 | ||
136 | WARN_ON(msg_data_left(&msg)); | |
137 | return 1; | |
138 | } | |
139 | ||
140 | static int do_try_sendpage(struct socket *sock, struct iov_iter *it) | |
141 | { | |
142 | struct msghdr msg = { .msg_flags = CEPH_MSG_FLAGS }; | |
143 | struct bio_vec bv; | |
144 | int ret; | |
145 | ||
146 | if (WARN_ON(!iov_iter_is_bvec(it))) | |
147 | return -EINVAL; | |
148 | ||
149 | while (iov_iter_count(it)) { | |
150 | /* iov_iter_iovec() for ITER_BVEC */ | |
151 | bv.bv_page = it->bvec->bv_page; | |
152 | bv.bv_offset = it->bvec->bv_offset + it->iov_offset; | |
153 | bv.bv_len = min(iov_iter_count(it), | |
154 | it->bvec->bv_len - it->iov_offset); | |
155 | ||
156 | /* | |
157 | * sendpage cannot properly handle pages with | |
158 | * page_count == 0, we need to fall back to sendmsg if | |
159 | * that's the case. | |
160 | * | |
161 | * Same goes for slab pages: skb_can_coalesce() allows | |
162 | * coalescing neighboring slab objects into a single frag | |
163 | * which triggers one of hardened usercopy checks. | |
164 | */ | |
165 | if (sendpage_ok(bv.bv_page)) { | |
166 | ret = sock->ops->sendpage(sock, bv.bv_page, | |
167 | bv.bv_offset, bv.bv_len, | |
168 | CEPH_MSG_FLAGS); | |
169 | } else { | |
170 | iov_iter_bvec(&msg.msg_iter, WRITE, &bv, 1, bv.bv_len); | |
171 | ret = sock_sendmsg(sock, &msg); | |
172 | } | |
173 | if (ret <= 0) { | |
174 | if (ret == -EAGAIN) | |
175 | ret = 0; | |
176 | return ret; | |
177 | } | |
178 | ||
179 | iov_iter_advance(it, ret); | |
180 | } | |
181 | ||
182 | return 1; | |
183 | } | |
184 | ||
185 | /* | |
186 | * Write as much as possible. The socket is expected to be corked, | |
187 | * so we don't bother with MSG_MORE/MSG_SENDPAGE_NOTLAST here. | |
188 | * | |
189 | * Return: | |
190 | * 1 - done, nothing (else) to write | |
191 | * 0 - socket is full, need to wait | |
192 | * <0 - error | |
193 | */ | |
194 | static int ceph_tcp_send(struct ceph_connection *con) | |
195 | { | |
196 | int ret; | |
197 | ||
198 | dout("%s con %p have %zu try_sendpage %d\n", __func__, con, | |
199 | iov_iter_count(&con->v2.out_iter), con->v2.out_iter_sendpage); | |
200 | if (con->v2.out_iter_sendpage) | |
201 | ret = do_try_sendpage(con->sock, &con->v2.out_iter); | |
202 | else | |
203 | ret = do_sendmsg(con->sock, &con->v2.out_iter); | |
204 | dout("%s con %p ret %d left %zu\n", __func__, con, ret, | |
205 | iov_iter_count(&con->v2.out_iter)); | |
206 | return ret; | |
207 | } | |
208 | ||
209 | static void add_in_kvec(struct ceph_connection *con, void *buf, int len) | |
210 | { | |
211 | BUG_ON(con->v2.in_kvec_cnt >= ARRAY_SIZE(con->v2.in_kvecs)); | |
212 | WARN_ON(!iov_iter_is_kvec(&con->v2.in_iter)); | |
213 | ||
214 | con->v2.in_kvecs[con->v2.in_kvec_cnt].iov_base = buf; | |
215 | con->v2.in_kvecs[con->v2.in_kvec_cnt].iov_len = len; | |
216 | con->v2.in_kvec_cnt++; | |
217 | ||
218 | con->v2.in_iter.nr_segs++; | |
219 | con->v2.in_iter.count += len; | |
220 | } | |
221 | ||
222 | static void reset_in_kvecs(struct ceph_connection *con) | |
223 | { | |
224 | WARN_ON(iov_iter_count(&con->v2.in_iter)); | |
225 | ||
226 | con->v2.in_kvec_cnt = 0; | |
227 | iov_iter_kvec(&con->v2.in_iter, READ, con->v2.in_kvecs, 0, 0); | |
228 | } | |
229 | ||
230 | static void set_in_bvec(struct ceph_connection *con, const struct bio_vec *bv) | |
231 | { | |
232 | WARN_ON(iov_iter_count(&con->v2.in_iter)); | |
233 | ||
234 | con->v2.in_bvec = *bv; | |
235 | iov_iter_bvec(&con->v2.in_iter, READ, &con->v2.in_bvec, 1, bv->bv_len); | |
236 | } | |
237 | ||
238 | static void set_in_skip(struct ceph_connection *con, int len) | |
239 | { | |
240 | WARN_ON(iov_iter_count(&con->v2.in_iter)); | |
241 | ||
242 | dout("%s con %p len %d\n", __func__, con, len); | |
243 | iov_iter_discard(&con->v2.in_iter, READ, len); | |
244 | } | |
245 | ||
246 | static void add_out_kvec(struct ceph_connection *con, void *buf, int len) | |
247 | { | |
248 | BUG_ON(con->v2.out_kvec_cnt >= ARRAY_SIZE(con->v2.out_kvecs)); | |
249 | WARN_ON(!iov_iter_is_kvec(&con->v2.out_iter)); | |
250 | WARN_ON(con->v2.out_zero); | |
251 | ||
252 | con->v2.out_kvecs[con->v2.out_kvec_cnt].iov_base = buf; | |
253 | con->v2.out_kvecs[con->v2.out_kvec_cnt].iov_len = len; | |
254 | con->v2.out_kvec_cnt++; | |
255 | ||
256 | con->v2.out_iter.nr_segs++; | |
257 | con->v2.out_iter.count += len; | |
258 | } | |
259 | ||
260 | static void reset_out_kvecs(struct ceph_connection *con) | |
261 | { | |
262 | WARN_ON(iov_iter_count(&con->v2.out_iter)); | |
263 | WARN_ON(con->v2.out_zero); | |
264 | ||
265 | con->v2.out_kvec_cnt = 0; | |
266 | ||
267 | iov_iter_kvec(&con->v2.out_iter, WRITE, con->v2.out_kvecs, 0, 0); | |
268 | con->v2.out_iter_sendpage = false; | |
269 | } | |
270 | ||
271 | static void set_out_bvec(struct ceph_connection *con, const struct bio_vec *bv, | |
272 | bool zerocopy) | |
273 | { | |
274 | WARN_ON(iov_iter_count(&con->v2.out_iter)); | |
275 | WARN_ON(con->v2.out_zero); | |
276 | ||
277 | con->v2.out_bvec = *bv; | |
278 | con->v2.out_iter_sendpage = zerocopy; | |
279 | iov_iter_bvec(&con->v2.out_iter, WRITE, &con->v2.out_bvec, 1, | |
280 | con->v2.out_bvec.bv_len); | |
281 | } | |
282 | ||
283 | static void set_out_bvec_zero(struct ceph_connection *con) | |
284 | { | |
285 | WARN_ON(iov_iter_count(&con->v2.out_iter)); | |
286 | WARN_ON(!con->v2.out_zero); | |
287 | ||
288 | con->v2.out_bvec.bv_page = ceph_zero_page; | |
289 | con->v2.out_bvec.bv_offset = 0; | |
290 | con->v2.out_bvec.bv_len = min(con->v2.out_zero, (int)PAGE_SIZE); | |
291 | con->v2.out_iter_sendpage = true; | |
292 | iov_iter_bvec(&con->v2.out_iter, WRITE, &con->v2.out_bvec, 1, | |
293 | con->v2.out_bvec.bv_len); | |
294 | } | |
295 | ||
296 | static void out_zero_add(struct ceph_connection *con, int len) | |
297 | { | |
298 | dout("%s con %p len %d\n", __func__, con, len); | |
299 | con->v2.out_zero += len; | |
300 | } | |
301 | ||
302 | static void *alloc_conn_buf(struct ceph_connection *con, int len) | |
303 | { | |
304 | void *buf; | |
305 | ||
306 | dout("%s con %p len %d\n", __func__, con, len); | |
307 | ||
308 | if (WARN_ON(con->v2.conn_buf_cnt >= ARRAY_SIZE(con->v2.conn_bufs))) | |
309 | return NULL; | |
310 | ||
311 | buf = ceph_kvmalloc(len, GFP_NOIO); | |
312 | if (!buf) | |
313 | return NULL; | |
314 | ||
315 | con->v2.conn_bufs[con->v2.conn_buf_cnt++] = buf; | |
316 | return buf; | |
317 | } | |
318 | ||
319 | static void free_conn_bufs(struct ceph_connection *con) | |
320 | { | |
321 | while (con->v2.conn_buf_cnt) | |
322 | kvfree(con->v2.conn_bufs[--con->v2.conn_buf_cnt]); | |
323 | } | |
324 | ||
325 | static void add_in_sign_kvec(struct ceph_connection *con, void *buf, int len) | |
326 | { | |
327 | BUG_ON(con->v2.in_sign_kvec_cnt >= ARRAY_SIZE(con->v2.in_sign_kvecs)); | |
328 | ||
329 | con->v2.in_sign_kvecs[con->v2.in_sign_kvec_cnt].iov_base = buf; | |
330 | con->v2.in_sign_kvecs[con->v2.in_sign_kvec_cnt].iov_len = len; | |
331 | con->v2.in_sign_kvec_cnt++; | |
332 | } | |
333 | ||
334 | static void clear_in_sign_kvecs(struct ceph_connection *con) | |
335 | { | |
336 | con->v2.in_sign_kvec_cnt = 0; | |
337 | } | |
338 | ||
339 | static void add_out_sign_kvec(struct ceph_connection *con, void *buf, int len) | |
340 | { | |
341 | BUG_ON(con->v2.out_sign_kvec_cnt >= ARRAY_SIZE(con->v2.out_sign_kvecs)); | |
342 | ||
343 | con->v2.out_sign_kvecs[con->v2.out_sign_kvec_cnt].iov_base = buf; | |
344 | con->v2.out_sign_kvecs[con->v2.out_sign_kvec_cnt].iov_len = len; | |
345 | con->v2.out_sign_kvec_cnt++; | |
346 | } | |
347 | ||
348 | static void clear_out_sign_kvecs(struct ceph_connection *con) | |
349 | { | |
350 | con->v2.out_sign_kvec_cnt = 0; | |
351 | } | |
352 | ||
353 | static bool con_secure(struct ceph_connection *con) | |
354 | { | |
355 | return con->v2.con_mode == CEPH_CON_MODE_SECURE; | |
356 | } | |
357 | ||
358 | static int front_len(const struct ceph_msg *msg) | |
359 | { | |
360 | return le32_to_cpu(msg->hdr.front_len); | |
361 | } | |
362 | ||
363 | static int middle_len(const struct ceph_msg *msg) | |
364 | { | |
365 | return le32_to_cpu(msg->hdr.middle_len); | |
366 | } | |
367 | ||
368 | static int data_len(const struct ceph_msg *msg) | |
369 | { | |
370 | return le32_to_cpu(msg->hdr.data_len); | |
371 | } | |
372 | ||
373 | static bool need_padding(int len) | |
374 | { | |
375 | return !IS_ALIGNED(len, CEPH_GCM_BLOCK_LEN); | |
376 | } | |
377 | ||
378 | static int padded_len(int len) | |
379 | { | |
380 | return ALIGN(len, CEPH_GCM_BLOCK_LEN); | |
381 | } | |
382 | ||
383 | static int padding_len(int len) | |
384 | { | |
385 | return padded_len(len) - len; | |
386 | } | |
387 | ||
388 | /* preamble + control segment */ | |
389 | static int head_onwire_len(int ctrl_len, bool secure) | |
390 | { | |
391 | int head_len; | |
392 | int rem_len; | |
393 | ||
394 | if (secure) { | |
395 | head_len = CEPH_PREAMBLE_SECURE_LEN; | |
396 | if (ctrl_len > CEPH_PREAMBLE_INLINE_LEN) { | |
397 | rem_len = ctrl_len - CEPH_PREAMBLE_INLINE_LEN; | |
398 | head_len += padded_len(rem_len) + CEPH_GCM_TAG_LEN; | |
399 | } | |
400 | } else { | |
401 | head_len = CEPH_PREAMBLE_PLAIN_LEN; | |
402 | if (ctrl_len) | |
403 | head_len += ctrl_len + CEPH_CRC_LEN; | |
404 | } | |
405 | return head_len; | |
406 | } | |
407 | ||
408 | /* front, middle and data segments + epilogue */ | |
409 | static int __tail_onwire_len(int front_len, int middle_len, int data_len, | |
410 | bool secure) | |
411 | { | |
412 | if (!front_len && !middle_len && !data_len) | |
413 | return 0; | |
414 | ||
415 | if (!secure) | |
416 | return front_len + middle_len + data_len + | |
417 | CEPH_EPILOGUE_PLAIN_LEN; | |
418 | ||
419 | return padded_len(front_len) + padded_len(middle_len) + | |
420 | padded_len(data_len) + CEPH_EPILOGUE_SECURE_LEN; | |
421 | } | |
422 | ||
423 | static int tail_onwire_len(const struct ceph_msg *msg, bool secure) | |
424 | { | |
425 | return __tail_onwire_len(front_len(msg), middle_len(msg), | |
426 | data_len(msg), secure); | |
427 | } | |
428 | ||
429 | /* head_onwire_len(sizeof(struct ceph_msg_header2), false) */ | |
430 | #define MESSAGE_HEAD_PLAIN_LEN (CEPH_PREAMBLE_PLAIN_LEN + \ | |
431 | sizeof(struct ceph_msg_header2) + \ | |
432 | CEPH_CRC_LEN) | |
433 | ||
434 | static const int frame_aligns[] = { | |
435 | sizeof(void *), | |
436 | sizeof(void *), | |
437 | sizeof(void *), | |
438 | PAGE_SIZE | |
439 | }; | |
440 | ||
441 | /* | |
442 | * Discards trailing empty segments, unless there is just one segment. | |
443 | * A frame always has at least one (possibly empty) segment. | |
444 | */ | |
445 | static int calc_segment_count(const int *lens, int len_cnt) | |
446 | { | |
447 | int i; | |
448 | ||
449 | for (i = len_cnt - 1; i >= 0; i--) { | |
450 | if (lens[i]) | |
451 | return i + 1; | |
452 | } | |
453 | ||
454 | return 1; | |
455 | } | |
456 | ||
457 | static void init_frame_desc(struct ceph_frame_desc *desc, int tag, | |
458 | const int *lens, int len_cnt) | |
459 | { | |
460 | int i; | |
461 | ||
462 | memset(desc, 0, sizeof(*desc)); | |
463 | ||
464 | desc->fd_tag = tag; | |
465 | desc->fd_seg_cnt = calc_segment_count(lens, len_cnt); | |
466 | BUG_ON(desc->fd_seg_cnt > CEPH_FRAME_MAX_SEGMENT_COUNT); | |
467 | for (i = 0; i < desc->fd_seg_cnt; i++) { | |
468 | desc->fd_lens[i] = lens[i]; | |
469 | desc->fd_aligns[i] = frame_aligns[i]; | |
470 | } | |
471 | } | |
472 | ||
473 | /* | |
474 | * Preamble crc covers everything up to itself (28 bytes) and | |
475 | * is calculated and verified irrespective of the connection mode | |
476 | * (i.e. even if the frame is encrypted). | |
477 | */ | |
478 | static void encode_preamble(const struct ceph_frame_desc *desc, void *p) | |
479 | { | |
480 | void *crcp = p + CEPH_PREAMBLE_LEN - CEPH_CRC_LEN; | |
481 | void *start = p; | |
482 | int i; | |
483 | ||
484 | memset(p, 0, CEPH_PREAMBLE_LEN); | |
485 | ||
486 | ceph_encode_8(&p, desc->fd_tag); | |
487 | ceph_encode_8(&p, desc->fd_seg_cnt); | |
488 | for (i = 0; i < desc->fd_seg_cnt; i++) { | |
489 | ceph_encode_32(&p, desc->fd_lens[i]); | |
490 | ceph_encode_16(&p, desc->fd_aligns[i]); | |
491 | } | |
492 | ||
493 | put_unaligned_le32(crc32c(0, start, crcp - start), crcp); | |
494 | } | |
495 | ||
496 | static int decode_preamble(void *p, struct ceph_frame_desc *desc) | |
497 | { | |
498 | void *crcp = p + CEPH_PREAMBLE_LEN - CEPH_CRC_LEN; | |
499 | u32 crc, expected_crc; | |
500 | int i; | |
501 | ||
502 | crc = crc32c(0, p, crcp - p); | |
503 | expected_crc = get_unaligned_le32(crcp); | |
504 | if (crc != expected_crc) { | |
505 | pr_err("bad preamble crc, calculated %u, expected %u\n", | |
506 | crc, expected_crc); | |
507 | return -EBADMSG; | |
508 | } | |
509 | ||
510 | memset(desc, 0, sizeof(*desc)); | |
511 | ||
512 | desc->fd_tag = ceph_decode_8(&p); | |
513 | desc->fd_seg_cnt = ceph_decode_8(&p); | |
514 | if (desc->fd_seg_cnt < 1 || | |
515 | desc->fd_seg_cnt > CEPH_FRAME_MAX_SEGMENT_COUNT) { | |
516 | pr_err("bad segment count %d\n", desc->fd_seg_cnt); | |
517 | return -EINVAL; | |
518 | } | |
519 | for (i = 0; i < desc->fd_seg_cnt; i++) { | |
520 | desc->fd_lens[i] = ceph_decode_32(&p); | |
521 | desc->fd_aligns[i] = ceph_decode_16(&p); | |
522 | } | |
523 | ||
524 | /* | |
525 | * This would fire for FRAME_TAG_WAIT (it has one empty | |
526 | * segment), but we should never get it as client. | |
527 | */ | |
528 | if (!desc->fd_lens[desc->fd_seg_cnt - 1]) { | |
529 | pr_err("last segment empty\n"); | |
530 | return -EINVAL; | |
531 | } | |
532 | ||
533 | if (desc->fd_lens[0] > CEPH_MSG_MAX_CONTROL_LEN) { | |
534 | pr_err("control segment too big %d\n", desc->fd_lens[0]); | |
535 | return -EINVAL; | |
536 | } | |
537 | if (desc->fd_lens[1] > CEPH_MSG_MAX_FRONT_LEN) { | |
538 | pr_err("front segment too big %d\n", desc->fd_lens[1]); | |
539 | return -EINVAL; | |
540 | } | |
541 | if (desc->fd_lens[2] > CEPH_MSG_MAX_MIDDLE_LEN) { | |
542 | pr_err("middle segment too big %d\n", desc->fd_lens[2]); | |
543 | return -EINVAL; | |
544 | } | |
545 | if (desc->fd_lens[3] > CEPH_MSG_MAX_DATA_LEN) { | |
546 | pr_err("data segment too big %d\n", desc->fd_lens[3]); | |
547 | return -EINVAL; | |
548 | } | |
549 | ||
550 | return 0; | |
551 | } | |
552 | ||
553 | static void encode_epilogue_plain(struct ceph_connection *con, bool aborted) | |
554 | { | |
555 | con->v2.out_epil.late_status = aborted ? FRAME_LATE_STATUS_ABORTED : | |
556 | FRAME_LATE_STATUS_COMPLETE; | |
557 | cpu_to_le32s(&con->v2.out_epil.front_crc); | |
558 | cpu_to_le32s(&con->v2.out_epil.middle_crc); | |
559 | cpu_to_le32s(&con->v2.out_epil.data_crc); | |
560 | } | |
561 | ||
562 | static void encode_epilogue_secure(struct ceph_connection *con, bool aborted) | |
563 | { | |
564 | memset(&con->v2.out_epil, 0, sizeof(con->v2.out_epil)); | |
565 | con->v2.out_epil.late_status = aborted ? FRAME_LATE_STATUS_ABORTED : | |
566 | FRAME_LATE_STATUS_COMPLETE; | |
567 | } | |
568 | ||
569 | static int decode_epilogue(void *p, u32 *front_crc, u32 *middle_crc, | |
570 | u32 *data_crc) | |
571 | { | |
572 | u8 late_status; | |
573 | ||
574 | late_status = ceph_decode_8(&p); | |
575 | if ((late_status & FRAME_LATE_STATUS_ABORTED_MASK) != | |
576 | FRAME_LATE_STATUS_COMPLETE) { | |
577 | /* we should never get an aborted message as client */ | |
578 | pr_err("bad late_status 0x%x\n", late_status); | |
579 | return -EINVAL; | |
580 | } | |
581 | ||
582 | if (front_crc && middle_crc && data_crc) { | |
583 | *front_crc = ceph_decode_32(&p); | |
584 | *middle_crc = ceph_decode_32(&p); | |
585 | *data_crc = ceph_decode_32(&p); | |
586 | } | |
587 | ||
588 | return 0; | |
589 | } | |
590 | ||
591 | static void fill_header(struct ceph_msg_header *hdr, | |
592 | const struct ceph_msg_header2 *hdr2, | |
593 | int front_len, int middle_len, int data_len, | |
594 | const struct ceph_entity_name *peer_name) | |
595 | { | |
596 | hdr->seq = hdr2->seq; | |
597 | hdr->tid = hdr2->tid; | |
598 | hdr->type = hdr2->type; | |
599 | hdr->priority = hdr2->priority; | |
600 | hdr->version = hdr2->version; | |
601 | hdr->front_len = cpu_to_le32(front_len); | |
602 | hdr->middle_len = cpu_to_le32(middle_len); | |
603 | hdr->data_len = cpu_to_le32(data_len); | |
604 | hdr->data_off = hdr2->data_off; | |
605 | hdr->src = *peer_name; | |
606 | hdr->compat_version = hdr2->compat_version; | |
607 | hdr->reserved = 0; | |
608 | hdr->crc = 0; | |
609 | } | |
610 | ||
611 | static void fill_header2(struct ceph_msg_header2 *hdr2, | |
612 | const struct ceph_msg_header *hdr, u64 ack_seq) | |
613 | { | |
614 | hdr2->seq = hdr->seq; | |
615 | hdr2->tid = hdr->tid; | |
616 | hdr2->type = hdr->type; | |
617 | hdr2->priority = hdr->priority; | |
618 | hdr2->version = hdr->version; | |
619 | hdr2->data_pre_padding_len = 0; | |
620 | hdr2->data_off = hdr->data_off; | |
621 | hdr2->ack_seq = cpu_to_le64(ack_seq); | |
622 | hdr2->flags = 0; | |
623 | hdr2->compat_version = hdr->compat_version; | |
624 | hdr2->reserved = 0; | |
625 | } | |
626 | ||
627 | static int verify_control_crc(struct ceph_connection *con) | |
628 | { | |
629 | int ctrl_len = con->v2.in_desc.fd_lens[0]; | |
630 | u32 crc, expected_crc; | |
631 | ||
632 | WARN_ON(con->v2.in_kvecs[0].iov_len != ctrl_len); | |
633 | WARN_ON(con->v2.in_kvecs[1].iov_len != CEPH_CRC_LEN); | |
634 | ||
635 | crc = crc32c(-1, con->v2.in_kvecs[0].iov_base, ctrl_len); | |
636 | expected_crc = get_unaligned_le32(con->v2.in_kvecs[1].iov_base); | |
637 | if (crc != expected_crc) { | |
638 | pr_err("bad control crc, calculated %u, expected %u\n", | |
639 | crc, expected_crc); | |
640 | return -EBADMSG; | |
641 | } | |
642 | ||
643 | return 0; | |
644 | } | |
645 | ||
646 | static int verify_epilogue_crcs(struct ceph_connection *con, u32 front_crc, | |
647 | u32 middle_crc, u32 data_crc) | |
648 | { | |
649 | if (front_len(con->in_msg)) { | |
650 | con->in_front_crc = crc32c(-1, con->in_msg->front.iov_base, | |
651 | front_len(con->in_msg)); | |
652 | } else { | |
653 | WARN_ON(!middle_len(con->in_msg) && !data_len(con->in_msg)); | |
654 | con->in_front_crc = -1; | |
655 | } | |
656 | ||
657 | if (middle_len(con->in_msg)) | |
658 | con->in_middle_crc = crc32c(-1, | |
659 | con->in_msg->middle->vec.iov_base, | |
660 | middle_len(con->in_msg)); | |
661 | else if (data_len(con->in_msg)) | |
662 | con->in_middle_crc = -1; | |
663 | else | |
664 | con->in_middle_crc = 0; | |
665 | ||
666 | if (!data_len(con->in_msg)) | |
667 | con->in_data_crc = 0; | |
668 | ||
669 | dout("%s con %p msg %p crcs %u %u %u\n", __func__, con, con->in_msg, | |
670 | con->in_front_crc, con->in_middle_crc, con->in_data_crc); | |
671 | ||
672 | if (con->in_front_crc != front_crc) { | |
673 | pr_err("bad front crc, calculated %u, expected %u\n", | |
674 | con->in_front_crc, front_crc); | |
675 | return -EBADMSG; | |
676 | } | |
677 | if (con->in_middle_crc != middle_crc) { | |
678 | pr_err("bad middle crc, calculated %u, expected %u\n", | |
679 | con->in_middle_crc, middle_crc); | |
680 | return -EBADMSG; | |
681 | } | |
682 | if (con->in_data_crc != data_crc) { | |
683 | pr_err("bad data crc, calculated %u, expected %u\n", | |
684 | con->in_data_crc, data_crc); | |
685 | return -EBADMSG; | |
686 | } | |
687 | ||
688 | return 0; | |
689 | } | |
690 | ||
691 | static int setup_crypto(struct ceph_connection *con, | |
10f42b3e ID |
692 | const u8 *session_key, int session_key_len, |
693 | const u8 *con_secret, int con_secret_len) | |
cd1a677c ID |
694 | { |
695 | unsigned int noio_flag; | |
cd1a677c ID |
696 | int ret; |
697 | ||
698 | dout("%s con %p con_mode %d session_key_len %d con_secret_len %d\n", | |
699 | __func__, con, con->v2.con_mode, session_key_len, con_secret_len); | |
700 | WARN_ON(con->v2.hmac_tfm || con->v2.gcm_tfm || con->v2.gcm_req); | |
701 | ||
702 | if (con->v2.con_mode != CEPH_CON_MODE_CRC && | |
703 | con->v2.con_mode != CEPH_CON_MODE_SECURE) { | |
704 | pr_err("bad con_mode %d\n", con->v2.con_mode); | |
705 | return -EINVAL; | |
706 | } | |
707 | ||
708 | if (!session_key_len) { | |
709 | WARN_ON(con->v2.con_mode != CEPH_CON_MODE_CRC); | |
710 | WARN_ON(con_secret_len); | |
711 | return 0; /* auth_none */ | |
712 | } | |
713 | ||
714 | noio_flag = memalloc_noio_save(); | |
715 | con->v2.hmac_tfm = crypto_alloc_shash("hmac(sha256)", 0, 0); | |
716 | memalloc_noio_restore(noio_flag); | |
717 | if (IS_ERR(con->v2.hmac_tfm)) { | |
718 | ret = PTR_ERR(con->v2.hmac_tfm); | |
719 | con->v2.hmac_tfm = NULL; | |
720 | pr_err("failed to allocate hmac tfm context: %d\n", ret); | |
721 | return ret; | |
722 | } | |
723 | ||
724 | WARN_ON((unsigned long)session_key & | |
725 | crypto_shash_alignmask(con->v2.hmac_tfm)); | |
726 | ret = crypto_shash_setkey(con->v2.hmac_tfm, session_key, | |
727 | session_key_len); | |
728 | if (ret) { | |
729 | pr_err("failed to set hmac key: %d\n", ret); | |
730 | return ret; | |
731 | } | |
732 | ||
733 | if (con->v2.con_mode == CEPH_CON_MODE_CRC) { | |
734 | WARN_ON(con_secret_len); | |
735 | return 0; /* auth_x, plain mode */ | |
736 | } | |
737 | ||
738 | if (con_secret_len < CEPH_GCM_KEY_LEN + 2 * CEPH_GCM_IV_LEN) { | |
739 | pr_err("con_secret too small %d\n", con_secret_len); | |
740 | return -EINVAL; | |
741 | } | |
742 | ||
743 | noio_flag = memalloc_noio_save(); | |
744 | con->v2.gcm_tfm = crypto_alloc_aead("gcm(aes)", 0, 0); | |
745 | memalloc_noio_restore(noio_flag); | |
746 | if (IS_ERR(con->v2.gcm_tfm)) { | |
747 | ret = PTR_ERR(con->v2.gcm_tfm); | |
748 | con->v2.gcm_tfm = NULL; | |
749 | pr_err("failed to allocate gcm tfm context: %d\n", ret); | |
750 | return ret; | |
751 | } | |
752 | ||
10f42b3e ID |
753 | WARN_ON((unsigned long)con_secret & |
754 | crypto_aead_alignmask(con->v2.gcm_tfm)); | |
755 | ret = crypto_aead_setkey(con->v2.gcm_tfm, con_secret, CEPH_GCM_KEY_LEN); | |
cd1a677c ID |
756 | if (ret) { |
757 | pr_err("failed to set gcm key: %d\n", ret); | |
758 | return ret; | |
759 | } | |
760 | ||
cd1a677c ID |
761 | WARN_ON(crypto_aead_ivsize(con->v2.gcm_tfm) != CEPH_GCM_IV_LEN); |
762 | ret = crypto_aead_setauthsize(con->v2.gcm_tfm, CEPH_GCM_TAG_LEN); | |
763 | if (ret) { | |
764 | pr_err("failed to set gcm tag size: %d\n", ret); | |
765 | return ret; | |
766 | } | |
767 | ||
768 | con->v2.gcm_req = aead_request_alloc(con->v2.gcm_tfm, GFP_NOIO); | |
769 | if (!con->v2.gcm_req) { | |
770 | pr_err("failed to allocate gcm request\n"); | |
771 | return -ENOMEM; | |
772 | } | |
773 | ||
774 | crypto_init_wait(&con->v2.gcm_wait); | |
775 | aead_request_set_callback(con->v2.gcm_req, CRYPTO_TFM_REQ_MAY_BACKLOG, | |
776 | crypto_req_done, &con->v2.gcm_wait); | |
777 | ||
10f42b3e ID |
778 | memcpy(&con->v2.in_gcm_nonce, con_secret + CEPH_GCM_KEY_LEN, |
779 | CEPH_GCM_IV_LEN); | |
780 | memcpy(&con->v2.out_gcm_nonce, | |
781 | con_secret + CEPH_GCM_KEY_LEN + CEPH_GCM_IV_LEN, | |
782 | CEPH_GCM_IV_LEN); | |
cd1a677c ID |
783 | return 0; /* auth_x, secure mode */ |
784 | } | |
785 | ||
786 | static int hmac_sha256(struct ceph_connection *con, const struct kvec *kvecs, | |
787 | int kvec_cnt, u8 *hmac) | |
788 | { | |
789 | SHASH_DESC_ON_STACK(desc, con->v2.hmac_tfm); /* tfm arg is ignored */ | |
790 | int ret; | |
791 | int i; | |
792 | ||
793 | dout("%s con %p hmac_tfm %p kvec_cnt %d\n", __func__, con, | |
794 | con->v2.hmac_tfm, kvec_cnt); | |
795 | ||
796 | if (!con->v2.hmac_tfm) { | |
797 | memset(hmac, 0, SHA256_DIGEST_SIZE); | |
798 | return 0; /* auth_none */ | |
799 | } | |
800 | ||
801 | desc->tfm = con->v2.hmac_tfm; | |
802 | ret = crypto_shash_init(desc); | |
803 | if (ret) | |
10f42b3e | 804 | goto out; |
cd1a677c ID |
805 | |
806 | for (i = 0; i < kvec_cnt; i++) { | |
807 | WARN_ON((unsigned long)kvecs[i].iov_base & | |
808 | crypto_shash_alignmask(con->v2.hmac_tfm)); | |
809 | ret = crypto_shash_update(desc, kvecs[i].iov_base, | |
810 | kvecs[i].iov_len); | |
811 | if (ret) | |
10f42b3e | 812 | goto out; |
cd1a677c ID |
813 | } |
814 | ||
815 | ret = crypto_shash_final(desc, hmac); | |
cd1a677c | 816 | |
10f42b3e | 817 | out: |
cd1a677c | 818 | shash_desc_zero(desc); |
10f42b3e | 819 | return ret; /* auth_x, both plain and secure modes */ |
cd1a677c ID |
820 | } |
821 | ||
822 | static void gcm_inc_nonce(struct ceph_gcm_nonce *nonce) | |
823 | { | |
824 | u64 counter; | |
825 | ||
826 | counter = le64_to_cpu(nonce->counter); | |
827 | nonce->counter = cpu_to_le64(counter + 1); | |
828 | } | |
829 | ||
830 | static int gcm_crypt(struct ceph_connection *con, bool encrypt, | |
831 | struct scatterlist *src, struct scatterlist *dst, | |
832 | int src_len) | |
833 | { | |
834 | struct ceph_gcm_nonce *nonce; | |
835 | int ret; | |
836 | ||
837 | nonce = encrypt ? &con->v2.out_gcm_nonce : &con->v2.in_gcm_nonce; | |
838 | ||
839 | aead_request_set_ad(con->v2.gcm_req, 0); /* no AAD */ | |
840 | aead_request_set_crypt(con->v2.gcm_req, src, dst, src_len, (u8 *)nonce); | |
841 | ret = crypto_wait_req(encrypt ? crypto_aead_encrypt(con->v2.gcm_req) : | |
842 | crypto_aead_decrypt(con->v2.gcm_req), | |
843 | &con->v2.gcm_wait); | |
844 | if (ret) | |
845 | return ret; | |
846 | ||
847 | gcm_inc_nonce(nonce); | |
848 | return 0; | |
849 | } | |
850 | ||
851 | static void get_bvec_at(struct ceph_msg_data_cursor *cursor, | |
852 | struct bio_vec *bv) | |
853 | { | |
854 | struct page *page; | |
855 | size_t off, len; | |
856 | ||
857 | WARN_ON(!cursor->total_resid); | |
858 | ||
859 | /* skip zero-length data items */ | |
860 | while (!cursor->resid) | |
861 | ceph_msg_data_advance(cursor, 0); | |
862 | ||
863 | /* get a piece of data, cursor isn't advanced */ | |
864 | page = ceph_msg_data_next(cursor, &off, &len, NULL); | |
865 | ||
866 | bv->bv_page = page; | |
867 | bv->bv_offset = off; | |
868 | bv->bv_len = len; | |
869 | } | |
870 | ||
871 | static int calc_sg_cnt(void *buf, int buf_len) | |
872 | { | |
873 | int sg_cnt; | |
874 | ||
875 | if (!buf_len) | |
876 | return 0; | |
877 | ||
878 | sg_cnt = need_padding(buf_len) ? 1 : 0; | |
879 | if (is_vmalloc_addr(buf)) { | |
880 | WARN_ON(offset_in_page(buf)); | |
881 | sg_cnt += PAGE_ALIGN(buf_len) >> PAGE_SHIFT; | |
882 | } else { | |
883 | sg_cnt++; | |
884 | } | |
885 | ||
886 | return sg_cnt; | |
887 | } | |
888 | ||
889 | static int calc_sg_cnt_cursor(struct ceph_msg_data_cursor *cursor) | |
890 | { | |
891 | int data_len = cursor->total_resid; | |
892 | struct bio_vec bv; | |
893 | int sg_cnt; | |
894 | ||
895 | if (!data_len) | |
896 | return 0; | |
897 | ||
898 | sg_cnt = need_padding(data_len) ? 1 : 0; | |
899 | do { | |
900 | get_bvec_at(cursor, &bv); | |
901 | sg_cnt++; | |
902 | ||
903 | ceph_msg_data_advance(cursor, bv.bv_len); | |
904 | } while (cursor->total_resid); | |
905 | ||
906 | return sg_cnt; | |
907 | } | |
908 | ||
909 | static void init_sgs(struct scatterlist **sg, void *buf, int buf_len, u8 *pad) | |
910 | { | |
911 | void *end = buf + buf_len; | |
912 | struct page *page; | |
913 | int len; | |
914 | void *p; | |
915 | ||
916 | if (!buf_len) | |
917 | return; | |
918 | ||
919 | if (is_vmalloc_addr(buf)) { | |
920 | p = buf; | |
921 | do { | |
922 | page = vmalloc_to_page(p); | |
923 | len = min_t(int, end - p, PAGE_SIZE); | |
924 | WARN_ON(!page || !len || offset_in_page(p)); | |
925 | sg_set_page(*sg, page, len, 0); | |
926 | *sg = sg_next(*sg); | |
927 | p += len; | |
928 | } while (p != end); | |
929 | } else { | |
930 | sg_set_buf(*sg, buf, buf_len); | |
931 | *sg = sg_next(*sg); | |
932 | } | |
933 | ||
934 | if (need_padding(buf_len)) { | |
935 | sg_set_buf(*sg, pad, padding_len(buf_len)); | |
936 | *sg = sg_next(*sg); | |
937 | } | |
938 | } | |
939 | ||
940 | static void init_sgs_cursor(struct scatterlist **sg, | |
941 | struct ceph_msg_data_cursor *cursor, u8 *pad) | |
942 | { | |
943 | int data_len = cursor->total_resid; | |
944 | struct bio_vec bv; | |
945 | ||
946 | if (!data_len) | |
947 | return; | |
948 | ||
949 | do { | |
950 | get_bvec_at(cursor, &bv); | |
951 | sg_set_page(*sg, bv.bv_page, bv.bv_len, bv.bv_offset); | |
952 | *sg = sg_next(*sg); | |
953 | ||
954 | ceph_msg_data_advance(cursor, bv.bv_len); | |
955 | } while (cursor->total_resid); | |
956 | ||
957 | if (need_padding(data_len)) { | |
958 | sg_set_buf(*sg, pad, padding_len(data_len)); | |
959 | *sg = sg_next(*sg); | |
960 | } | |
961 | } | |
962 | ||
963 | static int setup_message_sgs(struct sg_table *sgt, struct ceph_msg *msg, | |
964 | u8 *front_pad, u8 *middle_pad, u8 *data_pad, | |
965 | void *epilogue, bool add_tag) | |
966 | { | |
967 | struct ceph_msg_data_cursor cursor; | |
968 | struct scatterlist *cur_sg; | |
969 | int sg_cnt; | |
970 | int ret; | |
971 | ||
972 | if (!front_len(msg) && !middle_len(msg) && !data_len(msg)) | |
973 | return 0; | |
974 | ||
975 | sg_cnt = 1; /* epilogue + [auth tag] */ | |
976 | if (front_len(msg)) | |
977 | sg_cnt += calc_sg_cnt(msg->front.iov_base, | |
978 | front_len(msg)); | |
979 | if (middle_len(msg)) | |
980 | sg_cnt += calc_sg_cnt(msg->middle->vec.iov_base, | |
981 | middle_len(msg)); | |
982 | if (data_len(msg)) { | |
983 | ceph_msg_data_cursor_init(&cursor, msg, data_len(msg)); | |
984 | sg_cnt += calc_sg_cnt_cursor(&cursor); | |
985 | } | |
986 | ||
987 | ret = sg_alloc_table(sgt, sg_cnt, GFP_NOIO); | |
988 | if (ret) | |
989 | return ret; | |
990 | ||
991 | cur_sg = sgt->sgl; | |
992 | if (front_len(msg)) | |
993 | init_sgs(&cur_sg, msg->front.iov_base, front_len(msg), | |
994 | front_pad); | |
995 | if (middle_len(msg)) | |
996 | init_sgs(&cur_sg, msg->middle->vec.iov_base, middle_len(msg), | |
997 | middle_pad); | |
998 | if (data_len(msg)) { | |
999 | ceph_msg_data_cursor_init(&cursor, msg, data_len(msg)); | |
1000 | init_sgs_cursor(&cur_sg, &cursor, data_pad); | |
1001 | } | |
1002 | ||
1003 | WARN_ON(!sg_is_last(cur_sg)); | |
1004 | sg_set_buf(cur_sg, epilogue, | |
1005 | CEPH_GCM_BLOCK_LEN + (add_tag ? CEPH_GCM_TAG_LEN : 0)); | |
1006 | return 0; | |
1007 | } | |
1008 | ||
1009 | static int decrypt_preamble(struct ceph_connection *con) | |
1010 | { | |
1011 | struct scatterlist sg; | |
1012 | ||
1013 | sg_init_one(&sg, con->v2.in_buf, CEPH_PREAMBLE_SECURE_LEN); | |
1014 | return gcm_crypt(con, false, &sg, &sg, CEPH_PREAMBLE_SECURE_LEN); | |
1015 | } | |
1016 | ||
1017 | static int decrypt_control_remainder(struct ceph_connection *con) | |
1018 | { | |
1019 | int ctrl_len = con->v2.in_desc.fd_lens[0]; | |
1020 | int rem_len = ctrl_len - CEPH_PREAMBLE_INLINE_LEN; | |
1021 | int pt_len = padding_len(rem_len) + CEPH_GCM_TAG_LEN; | |
1022 | struct scatterlist sgs[2]; | |
1023 | ||
1024 | WARN_ON(con->v2.in_kvecs[0].iov_len != rem_len); | |
1025 | WARN_ON(con->v2.in_kvecs[1].iov_len != pt_len); | |
1026 | ||
1027 | sg_init_table(sgs, 2); | |
1028 | sg_set_buf(&sgs[0], con->v2.in_kvecs[0].iov_base, rem_len); | |
1029 | sg_set_buf(&sgs[1], con->v2.in_buf, pt_len); | |
1030 | ||
1031 | return gcm_crypt(con, false, sgs, sgs, | |
1032 | padded_len(rem_len) + CEPH_GCM_TAG_LEN); | |
1033 | } | |
1034 | ||
1035 | static int decrypt_message(struct ceph_connection *con) | |
1036 | { | |
1037 | struct sg_table sgt = {}; | |
1038 | int ret; | |
1039 | ||
1040 | ret = setup_message_sgs(&sgt, con->in_msg, FRONT_PAD(con->v2.in_buf), | |
1041 | MIDDLE_PAD(con->v2.in_buf), DATA_PAD(con->v2.in_buf), | |
1042 | con->v2.in_buf, true); | |
1043 | if (ret) | |
1044 | goto out; | |
1045 | ||
1046 | ret = gcm_crypt(con, false, sgt.sgl, sgt.sgl, | |
1047 | tail_onwire_len(con->in_msg, true)); | |
1048 | ||
1049 | out: | |
1050 | sg_free_table(&sgt); | |
1051 | return ret; | |
1052 | } | |
1053 | ||
1054 | static int prepare_banner(struct ceph_connection *con) | |
1055 | { | |
1056 | int buf_len = CEPH_BANNER_V2_LEN + 2 + 8 + 8; | |
1057 | void *buf, *p; | |
1058 | ||
1059 | buf = alloc_conn_buf(con, buf_len); | |
1060 | if (!buf) | |
1061 | return -ENOMEM; | |
1062 | ||
1063 | p = buf; | |
1064 | ceph_encode_copy(&p, CEPH_BANNER_V2, CEPH_BANNER_V2_LEN); | |
1065 | ceph_encode_16(&p, sizeof(u64) + sizeof(u64)); | |
1066 | ceph_encode_64(&p, CEPH_MSGR2_SUPPORTED_FEATURES); | |
1067 | ceph_encode_64(&p, CEPH_MSGR2_REQUIRED_FEATURES); | |
1068 | WARN_ON(p != buf + buf_len); | |
1069 | ||
1070 | add_out_kvec(con, buf, buf_len); | |
1071 | add_out_sign_kvec(con, buf, buf_len); | |
1072 | ceph_con_flag_set(con, CEPH_CON_F_WRITE_PENDING); | |
1073 | return 0; | |
1074 | } | |
1075 | ||
1076 | /* | |
1077 | * base: | |
1078 | * preamble | |
1079 | * control body (ctrl_len bytes) | |
1080 | * space for control crc | |
1081 | * | |
1082 | * extdata (optional): | |
1083 | * control body (extdata_len bytes) | |
1084 | * | |
1085 | * Compute control crc and gather base and extdata into: | |
1086 | * | |
1087 | * preamble | |
1088 | * control body (ctrl_len + extdata_len bytes) | |
1089 | * control crc | |
1090 | * | |
1091 | * Preamble should already be encoded at the start of base. | |
1092 | */ | |
1093 | static void prepare_head_plain(struct ceph_connection *con, void *base, | |
1094 | int ctrl_len, void *extdata, int extdata_len, | |
1095 | bool to_be_signed) | |
1096 | { | |
1097 | int base_len = CEPH_PREAMBLE_LEN + ctrl_len + CEPH_CRC_LEN; | |
1098 | void *crcp = base + base_len - CEPH_CRC_LEN; | |
1099 | u32 crc; | |
1100 | ||
1101 | crc = crc32c(-1, CTRL_BODY(base), ctrl_len); | |
1102 | if (extdata_len) | |
1103 | crc = crc32c(crc, extdata, extdata_len); | |
1104 | put_unaligned_le32(crc, crcp); | |
1105 | ||
1106 | if (!extdata_len) { | |
1107 | add_out_kvec(con, base, base_len); | |
1108 | if (to_be_signed) | |
1109 | add_out_sign_kvec(con, base, base_len); | |
1110 | return; | |
1111 | } | |
1112 | ||
1113 | add_out_kvec(con, base, crcp - base); | |
1114 | add_out_kvec(con, extdata, extdata_len); | |
1115 | add_out_kvec(con, crcp, CEPH_CRC_LEN); | |
1116 | if (to_be_signed) { | |
1117 | add_out_sign_kvec(con, base, crcp - base); | |
1118 | add_out_sign_kvec(con, extdata, extdata_len); | |
1119 | add_out_sign_kvec(con, crcp, CEPH_CRC_LEN); | |
1120 | } | |
1121 | } | |
1122 | ||
1123 | static int prepare_head_secure_small(struct ceph_connection *con, | |
1124 | void *base, int ctrl_len) | |
1125 | { | |
1126 | struct scatterlist sg; | |
1127 | int ret; | |
1128 | ||
1129 | /* inline buffer padding? */ | |
1130 | if (ctrl_len < CEPH_PREAMBLE_INLINE_LEN) | |
1131 | memset(CTRL_BODY(base) + ctrl_len, 0, | |
1132 | CEPH_PREAMBLE_INLINE_LEN - ctrl_len); | |
1133 | ||
1134 | sg_init_one(&sg, base, CEPH_PREAMBLE_SECURE_LEN); | |
1135 | ret = gcm_crypt(con, true, &sg, &sg, | |
1136 | CEPH_PREAMBLE_SECURE_LEN - CEPH_GCM_TAG_LEN); | |
1137 | if (ret) | |
1138 | return ret; | |
1139 | ||
1140 | add_out_kvec(con, base, CEPH_PREAMBLE_SECURE_LEN); | |
1141 | return 0; | |
1142 | } | |
1143 | ||
1144 | /* | |
1145 | * base: | |
1146 | * preamble | |
1147 | * control body (ctrl_len bytes) | |
1148 | * space for padding, if needed | |
1149 | * space for control remainder auth tag | |
1150 | * space for preamble auth tag | |
1151 | * | |
1152 | * Encrypt preamble and the inline portion, then encrypt the remainder | |
1153 | * and gather into: | |
1154 | * | |
1155 | * preamble | |
1156 | * control body (48 bytes) | |
1157 | * preamble auth tag | |
1158 | * control body (ctrl_len - 48 bytes) | |
1159 | * zero padding, if needed | |
1160 | * control remainder auth tag | |
1161 | * | |
1162 | * Preamble should already be encoded at the start of base. | |
1163 | */ | |
1164 | static int prepare_head_secure_big(struct ceph_connection *con, | |
1165 | void *base, int ctrl_len) | |
1166 | { | |
1167 | int rem_len = ctrl_len - CEPH_PREAMBLE_INLINE_LEN; | |
1168 | void *rem = CTRL_BODY(base) + CEPH_PREAMBLE_INLINE_LEN; | |
1169 | void *rem_tag = rem + padded_len(rem_len); | |
1170 | void *pmbl_tag = rem_tag + CEPH_GCM_TAG_LEN; | |
1171 | struct scatterlist sgs[2]; | |
1172 | int ret; | |
1173 | ||
1174 | sg_init_table(sgs, 2); | |
1175 | sg_set_buf(&sgs[0], base, rem - base); | |
1176 | sg_set_buf(&sgs[1], pmbl_tag, CEPH_GCM_TAG_LEN); | |
1177 | ret = gcm_crypt(con, true, sgs, sgs, rem - base); | |
1178 | if (ret) | |
1179 | return ret; | |
1180 | ||
1181 | /* control remainder padding? */ | |
1182 | if (need_padding(rem_len)) | |
1183 | memset(rem + rem_len, 0, padding_len(rem_len)); | |
1184 | ||
1185 | sg_init_one(&sgs[0], rem, pmbl_tag - rem); | |
1186 | ret = gcm_crypt(con, true, sgs, sgs, rem_tag - rem); | |
1187 | if (ret) | |
1188 | return ret; | |
1189 | ||
1190 | add_out_kvec(con, base, rem - base); | |
1191 | add_out_kvec(con, pmbl_tag, CEPH_GCM_TAG_LEN); | |
1192 | add_out_kvec(con, rem, pmbl_tag - rem); | |
1193 | return 0; | |
1194 | } | |
1195 | ||
1196 | static int __prepare_control(struct ceph_connection *con, int tag, | |
1197 | void *base, int ctrl_len, void *extdata, | |
1198 | int extdata_len, bool to_be_signed) | |
1199 | { | |
1200 | int total_len = ctrl_len + extdata_len; | |
1201 | struct ceph_frame_desc desc; | |
1202 | int ret; | |
1203 | ||
1204 | dout("%s con %p tag %d len %d (%d+%d)\n", __func__, con, tag, | |
1205 | total_len, ctrl_len, extdata_len); | |
1206 | ||
1207 | /* extdata may be vmalloc'ed but not base */ | |
1208 | if (WARN_ON(is_vmalloc_addr(base) || !ctrl_len)) | |
1209 | return -EINVAL; | |
1210 | ||
1211 | init_frame_desc(&desc, tag, &total_len, 1); | |
1212 | encode_preamble(&desc, base); | |
1213 | ||
1214 | if (con_secure(con)) { | |
1215 | if (WARN_ON(extdata_len || to_be_signed)) | |
1216 | return -EINVAL; | |
1217 | ||
1218 | if (ctrl_len <= CEPH_PREAMBLE_INLINE_LEN) | |
1219 | /* fully inlined, inline buffer may need padding */ | |
1220 | ret = prepare_head_secure_small(con, base, ctrl_len); | |
1221 | else | |
1222 | /* partially inlined, inline buffer is full */ | |
1223 | ret = prepare_head_secure_big(con, base, ctrl_len); | |
1224 | if (ret) | |
1225 | return ret; | |
1226 | } else { | |
1227 | prepare_head_plain(con, base, ctrl_len, extdata, extdata_len, | |
1228 | to_be_signed); | |
1229 | } | |
1230 | ||
1231 | ceph_con_flag_set(con, CEPH_CON_F_WRITE_PENDING); | |
1232 | return 0; | |
1233 | } | |
1234 | ||
1235 | static int prepare_control(struct ceph_connection *con, int tag, | |
1236 | void *base, int ctrl_len) | |
1237 | { | |
1238 | return __prepare_control(con, tag, base, ctrl_len, NULL, 0, false); | |
1239 | } | |
1240 | ||
1241 | static int prepare_hello(struct ceph_connection *con) | |
1242 | { | |
1243 | void *buf, *p; | |
1244 | int ctrl_len; | |
1245 | ||
1246 | ctrl_len = 1 + ceph_entity_addr_encoding_len(&con->peer_addr); | |
1247 | buf = alloc_conn_buf(con, head_onwire_len(ctrl_len, false)); | |
1248 | if (!buf) | |
1249 | return -ENOMEM; | |
1250 | ||
1251 | p = CTRL_BODY(buf); | |
1252 | ceph_encode_8(&p, CEPH_ENTITY_TYPE_CLIENT); | |
1253 | ceph_encode_entity_addr(&p, &con->peer_addr); | |
1254 | WARN_ON(p != CTRL_BODY(buf) + ctrl_len); | |
1255 | ||
1256 | return __prepare_control(con, FRAME_TAG_HELLO, buf, ctrl_len, | |
1257 | NULL, 0, true); | |
1258 | } | |
1259 | ||
1260 | /* so that head_onwire_len(AUTH_BUF_LEN, false) is 512 */ | |
1261 | #define AUTH_BUF_LEN (512 - CEPH_CRC_LEN - CEPH_PREAMBLE_PLAIN_LEN) | |
1262 | ||
1263 | static int prepare_auth_request(struct ceph_connection *con) | |
1264 | { | |
1265 | void *authorizer, *authorizer_copy; | |
1266 | int ctrl_len, authorizer_len; | |
1267 | void *buf; | |
1268 | int ret; | |
1269 | ||
1270 | ctrl_len = AUTH_BUF_LEN; | |
1271 | buf = alloc_conn_buf(con, head_onwire_len(ctrl_len, false)); | |
1272 | if (!buf) | |
1273 | return -ENOMEM; | |
1274 | ||
1275 | mutex_unlock(&con->mutex); | |
1276 | ret = con->ops->get_auth_request(con, CTRL_BODY(buf), &ctrl_len, | |
1277 | &authorizer, &authorizer_len); | |
1278 | mutex_lock(&con->mutex); | |
1279 | if (con->state != CEPH_CON_S_V2_HELLO) { | |
1280 | dout("%s con %p state changed to %d\n", __func__, con, | |
1281 | con->state); | |
1282 | return -EAGAIN; | |
1283 | } | |
1284 | ||
1285 | dout("%s con %p get_auth_request ret %d\n", __func__, con, ret); | |
1286 | if (ret) | |
1287 | return ret; | |
1288 | ||
1289 | authorizer_copy = alloc_conn_buf(con, authorizer_len); | |
1290 | if (!authorizer_copy) | |
1291 | return -ENOMEM; | |
1292 | ||
1293 | memcpy(authorizer_copy, authorizer, authorizer_len); | |
1294 | ||
1295 | return __prepare_control(con, FRAME_TAG_AUTH_REQUEST, buf, ctrl_len, | |
1296 | authorizer_copy, authorizer_len, true); | |
1297 | } | |
1298 | ||
1299 | static int prepare_auth_request_more(struct ceph_connection *con, | |
1300 | void *reply, int reply_len) | |
1301 | { | |
1302 | int ctrl_len, authorizer_len; | |
1303 | void *authorizer; | |
1304 | void *buf; | |
1305 | int ret; | |
1306 | ||
1307 | ctrl_len = AUTH_BUF_LEN; | |
1308 | buf = alloc_conn_buf(con, head_onwire_len(ctrl_len, false)); | |
1309 | if (!buf) | |
1310 | return -ENOMEM; | |
1311 | ||
1312 | mutex_unlock(&con->mutex); | |
1313 | ret = con->ops->handle_auth_reply_more(con, reply, reply_len, | |
1314 | CTRL_BODY(buf), &ctrl_len, | |
1315 | &authorizer, &authorizer_len); | |
1316 | mutex_lock(&con->mutex); | |
1317 | if (con->state != CEPH_CON_S_V2_AUTH) { | |
1318 | dout("%s con %p state changed to %d\n", __func__, con, | |
1319 | con->state); | |
1320 | return -EAGAIN; | |
1321 | } | |
1322 | ||
1323 | dout("%s con %p handle_auth_reply_more ret %d\n", __func__, con, ret); | |
1324 | if (ret) | |
1325 | return ret; | |
1326 | ||
1327 | return __prepare_control(con, FRAME_TAG_AUTH_REQUEST_MORE, buf, | |
1328 | ctrl_len, authorizer, authorizer_len, true); | |
1329 | } | |
1330 | ||
1331 | static int prepare_auth_signature(struct ceph_connection *con) | |
1332 | { | |
1333 | void *buf; | |
1334 | int ret; | |
1335 | ||
ad32fe88 ID |
1336 | buf = alloc_conn_buf(con, head_onwire_len(SHA256_DIGEST_SIZE, |
1337 | con_secure(con))); | |
cd1a677c ID |
1338 | if (!buf) |
1339 | return -ENOMEM; | |
1340 | ||
1341 | ret = hmac_sha256(con, con->v2.in_sign_kvecs, con->v2.in_sign_kvec_cnt, | |
1342 | CTRL_BODY(buf)); | |
1343 | if (ret) | |
1344 | return ret; | |
1345 | ||
1346 | return prepare_control(con, FRAME_TAG_AUTH_SIGNATURE, buf, | |
1347 | SHA256_DIGEST_SIZE); | |
1348 | } | |
1349 | ||
1350 | static int prepare_client_ident(struct ceph_connection *con) | |
1351 | { | |
1352 | struct ceph_entity_addr *my_addr = &con->msgr->inst.addr; | |
1353 | struct ceph_client *client = from_msgr(con->msgr); | |
1354 | u64 global_id = ceph_client_gid(client); | |
1355 | void *buf, *p; | |
1356 | int ctrl_len; | |
1357 | ||
1358 | WARN_ON(con->v2.server_cookie); | |
1359 | WARN_ON(con->v2.connect_seq); | |
1360 | WARN_ON(con->v2.peer_global_seq); | |
1361 | ||
1362 | if (!con->v2.client_cookie) { | |
1363 | do { | |
1364 | get_random_bytes(&con->v2.client_cookie, | |
1365 | sizeof(con->v2.client_cookie)); | |
1366 | } while (!con->v2.client_cookie); | |
1367 | dout("%s con %p generated cookie 0x%llx\n", __func__, con, | |
1368 | con->v2.client_cookie); | |
1369 | } else { | |
1370 | dout("%s con %p cookie already set 0x%llx\n", __func__, con, | |
1371 | con->v2.client_cookie); | |
1372 | } | |
1373 | ||
1374 | dout("%s con %p my_addr %s/%u peer_addr %s/%u global_id %llu global_seq %llu features 0x%llx required_features 0x%llx cookie 0x%llx\n", | |
1375 | __func__, con, ceph_pr_addr(my_addr), le32_to_cpu(my_addr->nonce), | |
1376 | ceph_pr_addr(&con->peer_addr), le32_to_cpu(con->peer_addr.nonce), | |
1377 | global_id, con->v2.global_seq, client->supported_features, | |
1378 | client->required_features, con->v2.client_cookie); | |
1379 | ||
1380 | ctrl_len = 1 + 4 + ceph_entity_addr_encoding_len(my_addr) + | |
1381 | ceph_entity_addr_encoding_len(&con->peer_addr) + 6 * 8; | |
1382 | buf = alloc_conn_buf(con, head_onwire_len(ctrl_len, con_secure(con))); | |
1383 | if (!buf) | |
1384 | return -ENOMEM; | |
1385 | ||
1386 | p = CTRL_BODY(buf); | |
1387 | ceph_encode_8(&p, 2); /* addrvec marker */ | |
1388 | ceph_encode_32(&p, 1); /* addr_cnt */ | |
1389 | ceph_encode_entity_addr(&p, my_addr); | |
1390 | ceph_encode_entity_addr(&p, &con->peer_addr); | |
1391 | ceph_encode_64(&p, global_id); | |
1392 | ceph_encode_64(&p, con->v2.global_seq); | |
1393 | ceph_encode_64(&p, client->supported_features); | |
1394 | ceph_encode_64(&p, client->required_features); | |
1395 | ceph_encode_64(&p, 0); /* flags */ | |
1396 | ceph_encode_64(&p, con->v2.client_cookie); | |
1397 | WARN_ON(p != CTRL_BODY(buf) + ctrl_len); | |
1398 | ||
1399 | return prepare_control(con, FRAME_TAG_CLIENT_IDENT, buf, ctrl_len); | |
1400 | } | |
1401 | ||
1402 | static int prepare_session_reconnect(struct ceph_connection *con) | |
1403 | { | |
1404 | struct ceph_entity_addr *my_addr = &con->msgr->inst.addr; | |
1405 | void *buf, *p; | |
1406 | int ctrl_len; | |
1407 | ||
1408 | WARN_ON(!con->v2.client_cookie); | |
1409 | WARN_ON(!con->v2.server_cookie); | |
1410 | WARN_ON(!con->v2.connect_seq); | |
1411 | WARN_ON(!con->v2.peer_global_seq); | |
1412 | ||
1413 | dout("%s con %p my_addr %s/%u client_cookie 0x%llx server_cookie 0x%llx global_seq %llu connect_seq %llu in_seq %llu\n", | |
1414 | __func__, con, ceph_pr_addr(my_addr), le32_to_cpu(my_addr->nonce), | |
1415 | con->v2.client_cookie, con->v2.server_cookie, con->v2.global_seq, | |
1416 | con->v2.connect_seq, con->in_seq); | |
1417 | ||
1418 | ctrl_len = 1 + 4 + ceph_entity_addr_encoding_len(my_addr) + 5 * 8; | |
1419 | buf = alloc_conn_buf(con, head_onwire_len(ctrl_len, con_secure(con))); | |
1420 | if (!buf) | |
1421 | return -ENOMEM; | |
1422 | ||
1423 | p = CTRL_BODY(buf); | |
1424 | ceph_encode_8(&p, 2); /* entity_addrvec_t marker */ | |
1425 | ceph_encode_32(&p, 1); /* my_addrs len */ | |
1426 | ceph_encode_entity_addr(&p, my_addr); | |
1427 | ceph_encode_64(&p, con->v2.client_cookie); | |
1428 | ceph_encode_64(&p, con->v2.server_cookie); | |
1429 | ceph_encode_64(&p, con->v2.global_seq); | |
1430 | ceph_encode_64(&p, con->v2.connect_seq); | |
1431 | ceph_encode_64(&p, con->in_seq); | |
1432 | WARN_ON(p != CTRL_BODY(buf) + ctrl_len); | |
1433 | ||
1434 | return prepare_control(con, FRAME_TAG_SESSION_RECONNECT, buf, ctrl_len); | |
1435 | } | |
1436 | ||
1437 | static int prepare_keepalive2(struct ceph_connection *con) | |
1438 | { | |
1439 | struct ceph_timespec *ts = CTRL_BODY(con->v2.out_buf); | |
1440 | struct timespec64 now; | |
1441 | ||
1442 | ktime_get_real_ts64(&now); | |
1443 | dout("%s con %p timestamp %lld.%09ld\n", __func__, con, now.tv_sec, | |
1444 | now.tv_nsec); | |
1445 | ||
1446 | ceph_encode_timespec64(ts, &now); | |
1447 | ||
1448 | reset_out_kvecs(con); | |
1449 | return prepare_control(con, FRAME_TAG_KEEPALIVE2, con->v2.out_buf, | |
1450 | sizeof(struct ceph_timespec)); | |
1451 | } | |
1452 | ||
1453 | static int prepare_ack(struct ceph_connection *con) | |
1454 | { | |
1455 | void *p; | |
1456 | ||
1457 | dout("%s con %p in_seq_acked %llu -> %llu\n", __func__, con, | |
1458 | con->in_seq_acked, con->in_seq); | |
1459 | con->in_seq_acked = con->in_seq; | |
1460 | ||
1461 | p = CTRL_BODY(con->v2.out_buf); | |
1462 | ceph_encode_64(&p, con->in_seq_acked); | |
1463 | ||
1464 | reset_out_kvecs(con); | |
1465 | return prepare_control(con, FRAME_TAG_ACK, con->v2.out_buf, 8); | |
1466 | } | |
1467 | ||
1468 | static void prepare_epilogue_plain(struct ceph_connection *con, bool aborted) | |
1469 | { | |
1470 | dout("%s con %p msg %p aborted %d crcs %u %u %u\n", __func__, con, | |
1471 | con->out_msg, aborted, con->v2.out_epil.front_crc, | |
1472 | con->v2.out_epil.middle_crc, con->v2.out_epil.data_crc); | |
1473 | ||
1474 | encode_epilogue_plain(con, aborted); | |
1475 | add_out_kvec(con, &con->v2.out_epil, CEPH_EPILOGUE_PLAIN_LEN); | |
1476 | } | |
1477 | ||
1478 | /* | |
1479 | * For "used" empty segments, crc is -1. For unused (trailing) | |
1480 | * segments, crc is 0. | |
1481 | */ | |
1482 | static void prepare_message_plain(struct ceph_connection *con) | |
1483 | { | |
1484 | struct ceph_msg *msg = con->out_msg; | |
1485 | ||
1486 | prepare_head_plain(con, con->v2.out_buf, | |
1487 | sizeof(struct ceph_msg_header2), NULL, 0, false); | |
1488 | ||
1489 | if (!front_len(msg) && !middle_len(msg)) { | |
1490 | if (!data_len(msg)) { | |
1491 | /* | |
1492 | * Empty message: once the head is written, | |
1493 | * we are done -- there is no epilogue. | |
1494 | */ | |
1495 | con->v2.out_state = OUT_S_FINISH_MESSAGE; | |
1496 | return; | |
1497 | } | |
1498 | ||
1499 | con->v2.out_epil.front_crc = -1; | |
1500 | con->v2.out_epil.middle_crc = -1; | |
1501 | con->v2.out_state = OUT_S_QUEUE_DATA; | |
1502 | return; | |
1503 | } | |
1504 | ||
1505 | if (front_len(msg)) { | |
1506 | con->v2.out_epil.front_crc = crc32c(-1, msg->front.iov_base, | |
1507 | front_len(msg)); | |
1508 | add_out_kvec(con, msg->front.iov_base, front_len(msg)); | |
1509 | } else { | |
1510 | /* middle (at least) is there, checked above */ | |
1511 | con->v2.out_epil.front_crc = -1; | |
1512 | } | |
1513 | ||
1514 | if (middle_len(msg)) { | |
1515 | con->v2.out_epil.middle_crc = | |
1516 | crc32c(-1, msg->middle->vec.iov_base, middle_len(msg)); | |
1517 | add_out_kvec(con, msg->middle->vec.iov_base, middle_len(msg)); | |
1518 | } else { | |
1519 | con->v2.out_epil.middle_crc = data_len(msg) ? -1 : 0; | |
1520 | } | |
1521 | ||
1522 | if (data_len(msg)) { | |
1523 | con->v2.out_state = OUT_S_QUEUE_DATA; | |
1524 | } else { | |
1525 | con->v2.out_epil.data_crc = 0; | |
1526 | prepare_epilogue_plain(con, false); | |
1527 | con->v2.out_state = OUT_S_FINISH_MESSAGE; | |
1528 | } | |
1529 | } | |
1530 | ||
1531 | /* | |
1532 | * Unfortunately the kernel crypto API doesn't support streaming | |
1533 | * (piecewise) operation for AEAD algorithms, so we can't get away | |
1534 | * with a fixed size buffer and a couple sgs. Instead, we have to | |
1535 | * allocate pages for the entire tail of the message (currently up | |
1536 | * to ~32M) and two sgs arrays (up to ~256K each)... | |
1537 | */ | |
1538 | static int prepare_message_secure(struct ceph_connection *con) | |
1539 | { | |
1540 | void *zerop = page_address(ceph_zero_page); | |
1541 | struct sg_table enc_sgt = {}; | |
1542 | struct sg_table sgt = {}; | |
1543 | struct page **enc_pages; | |
1544 | int enc_page_cnt; | |
1545 | int tail_len; | |
1546 | int ret; | |
1547 | ||
1548 | ret = prepare_head_secure_small(con, con->v2.out_buf, | |
1549 | sizeof(struct ceph_msg_header2)); | |
1550 | if (ret) | |
1551 | return ret; | |
1552 | ||
1553 | tail_len = tail_onwire_len(con->out_msg, true); | |
1554 | if (!tail_len) { | |
1555 | /* | |
1556 | * Empty message: once the head is written, | |
1557 | * we are done -- there is no epilogue. | |
1558 | */ | |
1559 | con->v2.out_state = OUT_S_FINISH_MESSAGE; | |
1560 | return 0; | |
1561 | } | |
1562 | ||
1563 | encode_epilogue_secure(con, false); | |
1564 | ret = setup_message_sgs(&sgt, con->out_msg, zerop, zerop, zerop, | |
1565 | &con->v2.out_epil, false); | |
1566 | if (ret) | |
1567 | goto out; | |
1568 | ||
1569 | enc_page_cnt = calc_pages_for(0, tail_len); | |
1570 | enc_pages = ceph_alloc_page_vector(enc_page_cnt, GFP_NOIO); | |
1571 | if (IS_ERR(enc_pages)) { | |
1572 | ret = PTR_ERR(enc_pages); | |
1573 | goto out; | |
1574 | } | |
1575 | ||
1576 | WARN_ON(con->v2.out_enc_pages || con->v2.out_enc_page_cnt); | |
1577 | con->v2.out_enc_pages = enc_pages; | |
1578 | con->v2.out_enc_page_cnt = enc_page_cnt; | |
1579 | con->v2.out_enc_resid = tail_len; | |
1580 | con->v2.out_enc_i = 0; | |
1581 | ||
1582 | ret = sg_alloc_table_from_pages(&enc_sgt, enc_pages, enc_page_cnt, | |
1583 | 0, tail_len, GFP_NOIO); | |
1584 | if (ret) | |
1585 | goto out; | |
1586 | ||
1587 | ret = gcm_crypt(con, true, sgt.sgl, enc_sgt.sgl, | |
1588 | tail_len - CEPH_GCM_TAG_LEN); | |
1589 | if (ret) | |
1590 | goto out; | |
1591 | ||
1592 | dout("%s con %p msg %p sg_cnt %d enc_page_cnt %d\n", __func__, con, | |
1593 | con->out_msg, sgt.orig_nents, enc_page_cnt); | |
1594 | con->v2.out_state = OUT_S_QUEUE_ENC_PAGE; | |
1595 | ||
1596 | out: | |
1597 | sg_free_table(&sgt); | |
1598 | sg_free_table(&enc_sgt); | |
1599 | return ret; | |
1600 | } | |
1601 | ||
1602 | static int prepare_message(struct ceph_connection *con) | |
1603 | { | |
1604 | int lens[] = { | |
1605 | sizeof(struct ceph_msg_header2), | |
1606 | front_len(con->out_msg), | |
1607 | middle_len(con->out_msg), | |
1608 | data_len(con->out_msg) | |
1609 | }; | |
1610 | struct ceph_frame_desc desc; | |
1611 | int ret; | |
1612 | ||
1613 | dout("%s con %p msg %p logical %d+%d+%d+%d\n", __func__, con, | |
1614 | con->out_msg, lens[0], lens[1], lens[2], lens[3]); | |
1615 | ||
1616 | if (con->in_seq > con->in_seq_acked) { | |
1617 | dout("%s con %p in_seq_acked %llu -> %llu\n", __func__, con, | |
1618 | con->in_seq_acked, con->in_seq); | |
1619 | con->in_seq_acked = con->in_seq; | |
1620 | } | |
1621 | ||
1622 | reset_out_kvecs(con); | |
1623 | init_frame_desc(&desc, FRAME_TAG_MESSAGE, lens, 4); | |
1624 | encode_preamble(&desc, con->v2.out_buf); | |
1625 | fill_header2(CTRL_BODY(con->v2.out_buf), &con->out_msg->hdr, | |
1626 | con->in_seq_acked); | |
1627 | ||
1628 | if (con_secure(con)) { | |
1629 | ret = prepare_message_secure(con); | |
1630 | if (ret) | |
1631 | return ret; | |
1632 | } else { | |
1633 | prepare_message_plain(con); | |
1634 | } | |
1635 | ||
1636 | ceph_con_flag_set(con, CEPH_CON_F_WRITE_PENDING); | |
1637 | return 0; | |
1638 | } | |
1639 | ||
1640 | static int prepare_read_banner_prefix(struct ceph_connection *con) | |
1641 | { | |
1642 | void *buf; | |
1643 | ||
1644 | buf = alloc_conn_buf(con, CEPH_BANNER_V2_PREFIX_LEN); | |
1645 | if (!buf) | |
1646 | return -ENOMEM; | |
1647 | ||
1648 | reset_in_kvecs(con); | |
1649 | add_in_kvec(con, buf, CEPH_BANNER_V2_PREFIX_LEN); | |
1650 | add_in_sign_kvec(con, buf, CEPH_BANNER_V2_PREFIX_LEN); | |
1651 | con->state = CEPH_CON_S_V2_BANNER_PREFIX; | |
1652 | return 0; | |
1653 | } | |
1654 | ||
1655 | static int prepare_read_banner_payload(struct ceph_connection *con, | |
1656 | int payload_len) | |
1657 | { | |
1658 | void *buf; | |
1659 | ||
1660 | buf = alloc_conn_buf(con, payload_len); | |
1661 | if (!buf) | |
1662 | return -ENOMEM; | |
1663 | ||
1664 | reset_in_kvecs(con); | |
1665 | add_in_kvec(con, buf, payload_len); | |
1666 | add_in_sign_kvec(con, buf, payload_len); | |
1667 | con->state = CEPH_CON_S_V2_BANNER_PAYLOAD; | |
1668 | return 0; | |
1669 | } | |
1670 | ||
1671 | static void prepare_read_preamble(struct ceph_connection *con) | |
1672 | { | |
1673 | reset_in_kvecs(con); | |
1674 | add_in_kvec(con, con->v2.in_buf, | |
1675 | con_secure(con) ? CEPH_PREAMBLE_SECURE_LEN : | |
1676 | CEPH_PREAMBLE_PLAIN_LEN); | |
1677 | con->v2.in_state = IN_S_HANDLE_PREAMBLE; | |
1678 | } | |
1679 | ||
1680 | static int prepare_read_control(struct ceph_connection *con) | |
1681 | { | |
1682 | int ctrl_len = con->v2.in_desc.fd_lens[0]; | |
1683 | int head_len; | |
1684 | void *buf; | |
1685 | ||
1686 | reset_in_kvecs(con); | |
1687 | if (con->state == CEPH_CON_S_V2_HELLO || | |
1688 | con->state == CEPH_CON_S_V2_AUTH) { | |
1689 | head_len = head_onwire_len(ctrl_len, false); | |
1690 | buf = alloc_conn_buf(con, head_len); | |
1691 | if (!buf) | |
1692 | return -ENOMEM; | |
1693 | ||
1694 | /* preserve preamble */ | |
1695 | memcpy(buf, con->v2.in_buf, CEPH_PREAMBLE_LEN); | |
1696 | ||
1697 | add_in_kvec(con, CTRL_BODY(buf), ctrl_len); | |
1698 | add_in_kvec(con, CTRL_BODY(buf) + ctrl_len, CEPH_CRC_LEN); | |
1699 | add_in_sign_kvec(con, buf, head_len); | |
1700 | } else { | |
1701 | if (ctrl_len > CEPH_PREAMBLE_INLINE_LEN) { | |
1702 | buf = alloc_conn_buf(con, ctrl_len); | |
1703 | if (!buf) | |
1704 | return -ENOMEM; | |
1705 | ||
1706 | add_in_kvec(con, buf, ctrl_len); | |
1707 | } else { | |
1708 | add_in_kvec(con, CTRL_BODY(con->v2.in_buf), ctrl_len); | |
1709 | } | |
1710 | add_in_kvec(con, con->v2.in_buf, CEPH_CRC_LEN); | |
1711 | } | |
1712 | con->v2.in_state = IN_S_HANDLE_CONTROL; | |
1713 | return 0; | |
1714 | } | |
1715 | ||
1716 | static int prepare_read_control_remainder(struct ceph_connection *con) | |
1717 | { | |
1718 | int ctrl_len = con->v2.in_desc.fd_lens[0]; | |
1719 | int rem_len = ctrl_len - CEPH_PREAMBLE_INLINE_LEN; | |
1720 | void *buf; | |
1721 | ||
1722 | buf = alloc_conn_buf(con, ctrl_len); | |
1723 | if (!buf) | |
1724 | return -ENOMEM; | |
1725 | ||
1726 | memcpy(buf, CTRL_BODY(con->v2.in_buf), CEPH_PREAMBLE_INLINE_LEN); | |
1727 | ||
1728 | reset_in_kvecs(con); | |
1729 | add_in_kvec(con, buf + CEPH_PREAMBLE_INLINE_LEN, rem_len); | |
1730 | add_in_kvec(con, con->v2.in_buf, | |
1731 | padding_len(rem_len) + CEPH_GCM_TAG_LEN); | |
1732 | con->v2.in_state = IN_S_HANDLE_CONTROL_REMAINDER; | |
1733 | return 0; | |
1734 | } | |
1735 | ||
1736 | static void prepare_read_data(struct ceph_connection *con) | |
1737 | { | |
1738 | struct bio_vec bv; | |
1739 | ||
1740 | if (!con_secure(con)) | |
1741 | con->in_data_crc = -1; | |
1742 | ceph_msg_data_cursor_init(&con->v2.in_cursor, con->in_msg, | |
1743 | data_len(con->in_msg)); | |
1744 | ||
1745 | get_bvec_at(&con->v2.in_cursor, &bv); | |
1746 | set_in_bvec(con, &bv); | |
1747 | con->v2.in_state = IN_S_PREPARE_READ_DATA_CONT; | |
1748 | } | |
1749 | ||
1750 | static void prepare_read_data_cont(struct ceph_connection *con) | |
1751 | { | |
1752 | struct bio_vec bv; | |
1753 | ||
1754 | if (!con_secure(con)) | |
1755 | con->in_data_crc = ceph_crc32c_page(con->in_data_crc, | |
1756 | con->v2.in_bvec.bv_page, | |
1757 | con->v2.in_bvec.bv_offset, | |
1758 | con->v2.in_bvec.bv_len); | |
1759 | ||
1760 | ceph_msg_data_advance(&con->v2.in_cursor, con->v2.in_bvec.bv_len); | |
1761 | if (con->v2.in_cursor.total_resid) { | |
1762 | get_bvec_at(&con->v2.in_cursor, &bv); | |
1763 | set_in_bvec(con, &bv); | |
1764 | WARN_ON(con->v2.in_state != IN_S_PREPARE_READ_DATA_CONT); | |
1765 | return; | |
1766 | } | |
1767 | ||
1768 | /* | |
1769 | * We've read all data. Prepare to read data padding (if any) | |
1770 | * and epilogue. | |
1771 | */ | |
1772 | reset_in_kvecs(con); | |
1773 | if (con_secure(con)) { | |
1774 | if (need_padding(data_len(con->in_msg))) | |
1775 | add_in_kvec(con, DATA_PAD(con->v2.in_buf), | |
1776 | padding_len(data_len(con->in_msg))); | |
1777 | add_in_kvec(con, con->v2.in_buf, CEPH_EPILOGUE_SECURE_LEN); | |
1778 | } else { | |
1779 | add_in_kvec(con, con->v2.in_buf, CEPH_EPILOGUE_PLAIN_LEN); | |
1780 | } | |
1781 | con->v2.in_state = IN_S_HANDLE_EPILOGUE; | |
1782 | } | |
1783 | ||
1784 | static void __finish_skip(struct ceph_connection *con) | |
1785 | { | |
1786 | con->in_seq++; | |
1787 | prepare_read_preamble(con); | |
1788 | } | |
1789 | ||
1790 | static void prepare_skip_message(struct ceph_connection *con) | |
1791 | { | |
1792 | struct ceph_frame_desc *desc = &con->v2.in_desc; | |
1793 | int tail_len; | |
1794 | ||
1795 | dout("%s con %p %d+%d+%d\n", __func__, con, desc->fd_lens[1], | |
1796 | desc->fd_lens[2], desc->fd_lens[3]); | |
1797 | ||
1798 | tail_len = __tail_onwire_len(desc->fd_lens[1], desc->fd_lens[2], | |
1799 | desc->fd_lens[3], con_secure(con)); | |
1800 | if (!tail_len) { | |
1801 | __finish_skip(con); | |
1802 | } else { | |
1803 | set_in_skip(con, tail_len); | |
1804 | con->v2.in_state = IN_S_FINISH_SKIP; | |
1805 | } | |
1806 | } | |
1807 | ||
1808 | static int process_banner_prefix(struct ceph_connection *con) | |
1809 | { | |
1810 | int payload_len; | |
1811 | void *p; | |
1812 | ||
1813 | WARN_ON(con->v2.in_kvecs[0].iov_len != CEPH_BANNER_V2_PREFIX_LEN); | |
1814 | ||
1815 | p = con->v2.in_kvecs[0].iov_base; | |
1816 | if (memcmp(p, CEPH_BANNER_V2, CEPH_BANNER_V2_LEN)) { | |
1817 | if (!memcmp(p, CEPH_BANNER, CEPH_BANNER_LEN)) | |
1818 | con->error_msg = "server is speaking msgr1 protocol"; | |
1819 | else | |
1820 | con->error_msg = "protocol error, bad banner"; | |
1821 | return -EINVAL; | |
1822 | } | |
1823 | ||
1824 | p += CEPH_BANNER_V2_LEN; | |
1825 | payload_len = ceph_decode_16(&p); | |
1826 | dout("%s con %p payload_len %d\n", __func__, con, payload_len); | |
1827 | ||
1828 | return prepare_read_banner_payload(con, payload_len); | |
1829 | } | |
1830 | ||
1831 | static int process_banner_payload(struct ceph_connection *con) | |
1832 | { | |
1833 | void *end = con->v2.in_kvecs[0].iov_base + con->v2.in_kvecs[0].iov_len; | |
1834 | u64 feat = CEPH_MSGR2_SUPPORTED_FEATURES; | |
1835 | u64 req_feat = CEPH_MSGR2_REQUIRED_FEATURES; | |
1836 | u64 server_feat, server_req_feat; | |
1837 | void *p; | |
1838 | int ret; | |
1839 | ||
1840 | p = con->v2.in_kvecs[0].iov_base; | |
1841 | ceph_decode_64_safe(&p, end, server_feat, bad); | |
1842 | ceph_decode_64_safe(&p, end, server_req_feat, bad); | |
1843 | ||
1844 | dout("%s con %p server_feat 0x%llx server_req_feat 0x%llx\n", | |
1845 | __func__, con, server_feat, server_req_feat); | |
1846 | ||
1847 | if (req_feat & ~server_feat) { | |
1848 | pr_err("msgr2 feature set mismatch: my required > server's supported 0x%llx, need 0x%llx\n", | |
1849 | server_feat, req_feat & ~server_feat); | |
1850 | con->error_msg = "missing required protocol features"; | |
1851 | return -EINVAL; | |
1852 | } | |
1853 | if (server_req_feat & ~feat) { | |
1854 | pr_err("msgr2 feature set mismatch: server's required > my supported 0x%llx, missing 0x%llx\n", | |
1855 | feat, server_req_feat & ~feat); | |
1856 | con->error_msg = "missing required protocol features"; | |
1857 | return -EINVAL; | |
1858 | } | |
1859 | ||
1860 | /* no reset_out_kvecs() as our banner may still be pending */ | |
1861 | ret = prepare_hello(con); | |
1862 | if (ret) { | |
1863 | pr_err("prepare_hello failed: %d\n", ret); | |
1864 | return ret; | |
1865 | } | |
1866 | ||
1867 | con->state = CEPH_CON_S_V2_HELLO; | |
1868 | prepare_read_preamble(con); | |
1869 | return 0; | |
1870 | ||
1871 | bad: | |
1872 | pr_err("failed to decode banner payload\n"); | |
1873 | return -EINVAL; | |
1874 | } | |
1875 | ||
1876 | static int process_hello(struct ceph_connection *con, void *p, void *end) | |
1877 | { | |
1878 | struct ceph_entity_addr *my_addr = &con->msgr->inst.addr; | |
1879 | struct ceph_entity_addr addr_for_me; | |
1880 | u8 entity_type; | |
1881 | int ret; | |
1882 | ||
1883 | if (con->state != CEPH_CON_S_V2_HELLO) { | |
1884 | con->error_msg = "protocol error, unexpected hello"; | |
1885 | return -EINVAL; | |
1886 | } | |
1887 | ||
1888 | ceph_decode_8_safe(&p, end, entity_type, bad); | |
1889 | ret = ceph_decode_entity_addr(&p, end, &addr_for_me); | |
1890 | if (ret) { | |
1891 | pr_err("failed to decode addr_for_me: %d\n", ret); | |
1892 | return ret; | |
1893 | } | |
1894 | ||
1895 | dout("%s con %p entity_type %d addr_for_me %s\n", __func__, con, | |
1896 | entity_type, ceph_pr_addr(&addr_for_me)); | |
1897 | ||
1898 | if (entity_type != con->peer_name.type) { | |
1899 | pr_err("bad peer type, want %d, got %d\n", | |
1900 | con->peer_name.type, entity_type); | |
1901 | con->error_msg = "wrong peer at address"; | |
1902 | return -EINVAL; | |
1903 | } | |
1904 | ||
1905 | /* | |
1906 | * Set our address to the address our first peer (i.e. monitor) | |
1907 | * sees that we are connecting from. If we are behind some sort | |
1908 | * of NAT and want to be identified by some private (not NATed) | |
1909 | * address, ip option should be used. | |
1910 | */ | |
1911 | if (ceph_addr_is_blank(my_addr)) { | |
1912 | memcpy(&my_addr->in_addr, &addr_for_me.in_addr, | |
1913 | sizeof(my_addr->in_addr)); | |
1914 | ceph_addr_set_port(my_addr, 0); | |
1915 | dout("%s con %p set my addr %s, as seen by peer %s\n", | |
1916 | __func__, con, ceph_pr_addr(my_addr), | |
1917 | ceph_pr_addr(&con->peer_addr)); | |
1918 | } else { | |
1919 | dout("%s con %p my addr already set %s\n", | |
1920 | __func__, con, ceph_pr_addr(my_addr)); | |
1921 | } | |
1922 | ||
1923 | WARN_ON(ceph_addr_is_blank(my_addr) || ceph_addr_port(my_addr)); | |
1924 | WARN_ON(my_addr->type != CEPH_ENTITY_ADDR_TYPE_ANY); | |
1925 | WARN_ON(!my_addr->nonce); | |
1926 | ||
1927 | /* no reset_out_kvecs() as our hello may still be pending */ | |
1928 | ret = prepare_auth_request(con); | |
1929 | if (ret) { | |
1930 | if (ret != -EAGAIN) | |
1931 | pr_err("prepare_auth_request failed: %d\n", ret); | |
1932 | return ret; | |
1933 | } | |
1934 | ||
1935 | con->state = CEPH_CON_S_V2_AUTH; | |
1936 | return 0; | |
1937 | ||
1938 | bad: | |
1939 | pr_err("failed to decode hello\n"); | |
1940 | return -EINVAL; | |
1941 | } | |
1942 | ||
1943 | static int process_auth_bad_method(struct ceph_connection *con, | |
1944 | void *p, void *end) | |
1945 | { | |
1946 | int allowed_protos[8], allowed_modes[8]; | |
1947 | int allowed_proto_cnt, allowed_mode_cnt; | |
1948 | int used_proto, result; | |
1949 | int ret; | |
1950 | int i; | |
1951 | ||
1952 | if (con->state != CEPH_CON_S_V2_AUTH) { | |
1953 | con->error_msg = "protocol error, unexpected auth_bad_method"; | |
1954 | return -EINVAL; | |
1955 | } | |
1956 | ||
1957 | ceph_decode_32_safe(&p, end, used_proto, bad); | |
1958 | ceph_decode_32_safe(&p, end, result, bad); | |
1959 | dout("%s con %p used_proto %d result %d\n", __func__, con, used_proto, | |
1960 | result); | |
1961 | ||
1962 | ceph_decode_32_safe(&p, end, allowed_proto_cnt, bad); | |
1963 | if (allowed_proto_cnt > ARRAY_SIZE(allowed_protos)) { | |
1964 | pr_err("allowed_protos too big %d\n", allowed_proto_cnt); | |
1965 | return -EINVAL; | |
1966 | } | |
1967 | for (i = 0; i < allowed_proto_cnt; i++) { | |
1968 | ceph_decode_32_safe(&p, end, allowed_protos[i], bad); | |
1969 | dout("%s con %p allowed_protos[%d] %d\n", __func__, con, | |
1970 | i, allowed_protos[i]); | |
1971 | } | |
1972 | ||
1973 | ceph_decode_32_safe(&p, end, allowed_mode_cnt, bad); | |
1974 | if (allowed_mode_cnt > ARRAY_SIZE(allowed_modes)) { | |
1975 | pr_err("allowed_modes too big %d\n", allowed_mode_cnt); | |
1976 | return -EINVAL; | |
1977 | } | |
1978 | for (i = 0; i < allowed_mode_cnt; i++) { | |
1979 | ceph_decode_32_safe(&p, end, allowed_modes[i], bad); | |
1980 | dout("%s con %p allowed_modes[%d] %d\n", __func__, con, | |
1981 | i, allowed_modes[i]); | |
1982 | } | |
1983 | ||
1984 | mutex_unlock(&con->mutex); | |
1985 | ret = con->ops->handle_auth_bad_method(con, used_proto, result, | |
1986 | allowed_protos, | |
1987 | allowed_proto_cnt, | |
1988 | allowed_modes, | |
1989 | allowed_mode_cnt); | |
1990 | mutex_lock(&con->mutex); | |
1991 | if (con->state != CEPH_CON_S_V2_AUTH) { | |
1992 | dout("%s con %p state changed to %d\n", __func__, con, | |
1993 | con->state); | |
1994 | return -EAGAIN; | |
1995 | } | |
1996 | ||
1997 | dout("%s con %p handle_auth_bad_method ret %d\n", __func__, con, ret); | |
1998 | return ret; | |
1999 | ||
2000 | bad: | |
2001 | pr_err("failed to decode auth_bad_method\n"); | |
2002 | return -EINVAL; | |
2003 | } | |
2004 | ||
2005 | static int process_auth_reply_more(struct ceph_connection *con, | |
2006 | void *p, void *end) | |
2007 | { | |
2008 | int payload_len; | |
2009 | int ret; | |
2010 | ||
2011 | if (con->state != CEPH_CON_S_V2_AUTH) { | |
2012 | con->error_msg = "protocol error, unexpected auth_reply_more"; | |
2013 | return -EINVAL; | |
2014 | } | |
2015 | ||
2016 | ceph_decode_32_safe(&p, end, payload_len, bad); | |
2017 | ceph_decode_need(&p, end, payload_len, bad); | |
2018 | ||
2019 | dout("%s con %p payload_len %d\n", __func__, con, payload_len); | |
2020 | ||
2021 | reset_out_kvecs(con); | |
2022 | ret = prepare_auth_request_more(con, p, payload_len); | |
2023 | if (ret) { | |
2024 | if (ret != -EAGAIN) | |
2025 | pr_err("prepare_auth_request_more failed: %d\n", ret); | |
2026 | return ret; | |
2027 | } | |
2028 | ||
2029 | return 0; | |
2030 | ||
2031 | bad: | |
2032 | pr_err("failed to decode auth_reply_more\n"); | |
2033 | return -EINVAL; | |
2034 | } | |
2035 | ||
f5f2c9a0 ID |
2036 | /* |
2037 | * Align session_key and con_secret to avoid GFP_ATOMIC allocation | |
2038 | * inside crypto_shash_setkey() and crypto_aead_setkey() called from | |
2039 | * setup_crypto(). __aligned(16) isn't guaranteed to work for stack | |
2040 | * objects, so do it by hand. | |
2041 | */ | |
cd1a677c ID |
2042 | static int process_auth_done(struct ceph_connection *con, void *p, void *end) |
2043 | { | |
f5f2c9a0 ID |
2044 | u8 session_key_buf[CEPH_KEY_LEN + 16]; |
2045 | u8 con_secret_buf[CEPH_MAX_CON_SECRET_LEN + 16]; | |
2046 | u8 *session_key = PTR_ALIGN(&session_key_buf[0], 16); | |
2047 | u8 *con_secret = PTR_ALIGN(&con_secret_buf[0], 16); | |
cd1a677c ID |
2048 | int session_key_len, con_secret_len; |
2049 | int payload_len; | |
2050 | u64 global_id; | |
2051 | int ret; | |
2052 | ||
2053 | if (con->state != CEPH_CON_S_V2_AUTH) { | |
2054 | con->error_msg = "protocol error, unexpected auth_done"; | |
2055 | return -EINVAL; | |
2056 | } | |
2057 | ||
2058 | ceph_decode_64_safe(&p, end, global_id, bad); | |
2059 | ceph_decode_32_safe(&p, end, con->v2.con_mode, bad); | |
2060 | ceph_decode_32_safe(&p, end, payload_len, bad); | |
2061 | ||
2062 | dout("%s con %p global_id %llu con_mode %d payload_len %d\n", | |
2063 | __func__, con, global_id, con->v2.con_mode, payload_len); | |
2064 | ||
2065 | mutex_unlock(&con->mutex); | |
2066 | session_key_len = 0; | |
2067 | con_secret_len = 0; | |
2068 | ret = con->ops->handle_auth_done(con, global_id, p, payload_len, | |
2069 | session_key, &session_key_len, | |
2070 | con_secret, &con_secret_len); | |
2071 | mutex_lock(&con->mutex); | |
2072 | if (con->state != CEPH_CON_S_V2_AUTH) { | |
2073 | dout("%s con %p state changed to %d\n", __func__, con, | |
2074 | con->state); | |
10f42b3e ID |
2075 | ret = -EAGAIN; |
2076 | goto out; | |
cd1a677c ID |
2077 | } |
2078 | ||
2079 | dout("%s con %p handle_auth_done ret %d\n", __func__, con, ret); | |
2080 | if (ret) | |
10f42b3e | 2081 | goto out; |
cd1a677c ID |
2082 | |
2083 | ret = setup_crypto(con, session_key, session_key_len, con_secret, | |
2084 | con_secret_len); | |
2085 | if (ret) | |
10f42b3e | 2086 | goto out; |
cd1a677c ID |
2087 | |
2088 | reset_out_kvecs(con); | |
2089 | ret = prepare_auth_signature(con); | |
2090 | if (ret) { | |
2091 | pr_err("prepare_auth_signature failed: %d\n", ret); | |
10f42b3e | 2092 | goto out; |
cd1a677c ID |
2093 | } |
2094 | ||
2095 | con->state = CEPH_CON_S_V2_AUTH_SIGNATURE; | |
10f42b3e ID |
2096 | |
2097 | out: | |
2098 | memzero_explicit(session_key_buf, sizeof(session_key_buf)); | |
2099 | memzero_explicit(con_secret_buf, sizeof(con_secret_buf)); | |
2100 | return ret; | |
cd1a677c ID |
2101 | |
2102 | bad: | |
2103 | pr_err("failed to decode auth_done\n"); | |
2104 | return -EINVAL; | |
2105 | } | |
2106 | ||
2107 | static int process_auth_signature(struct ceph_connection *con, | |
2108 | void *p, void *end) | |
2109 | { | |
2110 | u8 hmac[SHA256_DIGEST_SIZE]; | |
2111 | int ret; | |
2112 | ||
2113 | if (con->state != CEPH_CON_S_V2_AUTH_SIGNATURE) { | |
2114 | con->error_msg = "protocol error, unexpected auth_signature"; | |
2115 | return -EINVAL; | |
2116 | } | |
2117 | ||
2118 | ret = hmac_sha256(con, con->v2.out_sign_kvecs, | |
2119 | con->v2.out_sign_kvec_cnt, hmac); | |
2120 | if (ret) | |
2121 | return ret; | |
2122 | ||
2123 | ceph_decode_need(&p, end, SHA256_DIGEST_SIZE, bad); | |
2124 | if (crypto_memneq(p, hmac, SHA256_DIGEST_SIZE)) { | |
2125 | con->error_msg = "integrity error, bad auth signature"; | |
2126 | return -EBADMSG; | |
2127 | } | |
2128 | ||
2129 | dout("%s con %p auth signature ok\n", __func__, con); | |
2130 | ||
2131 | /* no reset_out_kvecs() as our auth_signature may still be pending */ | |
2132 | if (!con->v2.server_cookie) { | |
2133 | ret = prepare_client_ident(con); | |
2134 | if (ret) { | |
2135 | pr_err("prepare_client_ident failed: %d\n", ret); | |
2136 | return ret; | |
2137 | } | |
2138 | ||
2139 | con->state = CEPH_CON_S_V2_SESSION_CONNECT; | |
2140 | } else { | |
2141 | ret = prepare_session_reconnect(con); | |
2142 | if (ret) { | |
2143 | pr_err("prepare_session_reconnect failed: %d\n", ret); | |
2144 | return ret; | |
2145 | } | |
2146 | ||
2147 | con->state = CEPH_CON_S_V2_SESSION_RECONNECT; | |
2148 | } | |
2149 | ||
2150 | return 0; | |
2151 | ||
2152 | bad: | |
2153 | pr_err("failed to decode auth_signature\n"); | |
2154 | return -EINVAL; | |
2155 | } | |
2156 | ||
2157 | static int process_server_ident(struct ceph_connection *con, | |
2158 | void *p, void *end) | |
2159 | { | |
2160 | struct ceph_client *client = from_msgr(con->msgr); | |
2161 | u64 features, required_features; | |
2162 | struct ceph_entity_addr addr; | |
2163 | u64 global_seq; | |
2164 | u64 global_id; | |
2165 | u64 cookie; | |
2166 | u64 flags; | |
2167 | int ret; | |
2168 | ||
2169 | if (con->state != CEPH_CON_S_V2_SESSION_CONNECT) { | |
2170 | con->error_msg = "protocol error, unexpected server_ident"; | |
2171 | return -EINVAL; | |
2172 | } | |
2173 | ||
2174 | ret = ceph_decode_entity_addrvec(&p, end, true, &addr); | |
2175 | if (ret) { | |
2176 | pr_err("failed to decode server addrs: %d\n", ret); | |
2177 | return ret; | |
2178 | } | |
2179 | ||
2180 | ceph_decode_64_safe(&p, end, global_id, bad); | |
2181 | ceph_decode_64_safe(&p, end, global_seq, bad); | |
2182 | ceph_decode_64_safe(&p, end, features, bad); | |
2183 | ceph_decode_64_safe(&p, end, required_features, bad); | |
2184 | ceph_decode_64_safe(&p, end, flags, bad); | |
2185 | ceph_decode_64_safe(&p, end, cookie, bad); | |
2186 | ||
2187 | dout("%s con %p addr %s/%u global_id %llu global_seq %llu features 0x%llx required_features 0x%llx flags 0x%llx cookie 0x%llx\n", | |
2188 | __func__, con, ceph_pr_addr(&addr), le32_to_cpu(addr.nonce), | |
2189 | global_id, global_seq, features, required_features, flags, cookie); | |
2190 | ||
2191 | /* is this who we intended to talk to? */ | |
2192 | if (memcmp(&addr, &con->peer_addr, sizeof(con->peer_addr))) { | |
2193 | pr_err("bad peer addr/nonce, want %s/%u, got %s/%u\n", | |
2194 | ceph_pr_addr(&con->peer_addr), | |
2195 | le32_to_cpu(con->peer_addr.nonce), | |
2196 | ceph_pr_addr(&addr), le32_to_cpu(addr.nonce)); | |
2197 | con->error_msg = "wrong peer at address"; | |
2198 | return -EINVAL; | |
2199 | } | |
2200 | ||
2201 | if (client->required_features & ~features) { | |
2202 | pr_err("RADOS feature set mismatch: my required > server's supported 0x%llx, need 0x%llx\n", | |
2203 | features, client->required_features & ~features); | |
2204 | con->error_msg = "missing required protocol features"; | |
2205 | return -EINVAL; | |
2206 | } | |
2207 | ||
2208 | /* | |
2209 | * Both name->type and name->num are set in ceph_con_open() but | |
2210 | * name->num may be bogus in the initial monmap. name->type is | |
2211 | * verified in handle_hello(). | |
2212 | */ | |
2213 | WARN_ON(!con->peer_name.type); | |
2214 | con->peer_name.num = cpu_to_le64(global_id); | |
2215 | con->v2.peer_global_seq = global_seq; | |
2216 | con->peer_features = features; | |
2217 | WARN_ON(required_features & ~client->supported_features); | |
2218 | con->v2.server_cookie = cookie; | |
2219 | ||
2220 | if (flags & CEPH_MSG_CONNECT_LOSSY) { | |
2221 | ceph_con_flag_set(con, CEPH_CON_F_LOSSYTX); | |
2222 | WARN_ON(con->v2.server_cookie); | |
2223 | } else { | |
2224 | WARN_ON(!con->v2.server_cookie); | |
2225 | } | |
2226 | ||
2227 | clear_in_sign_kvecs(con); | |
2228 | clear_out_sign_kvecs(con); | |
2229 | free_conn_bufs(con); | |
2230 | con->delay = 0; /* reset backoff memory */ | |
2231 | ||
2232 | con->state = CEPH_CON_S_OPEN; | |
2233 | con->v2.out_state = OUT_S_GET_NEXT; | |
2234 | return 0; | |
2235 | ||
2236 | bad: | |
2237 | pr_err("failed to decode server_ident\n"); | |
2238 | return -EINVAL; | |
2239 | } | |
2240 | ||
2241 | static int process_ident_missing_features(struct ceph_connection *con, | |
2242 | void *p, void *end) | |
2243 | { | |
2244 | struct ceph_client *client = from_msgr(con->msgr); | |
2245 | u64 missing_features; | |
2246 | ||
2247 | if (con->state != CEPH_CON_S_V2_SESSION_CONNECT) { | |
2248 | con->error_msg = "protocol error, unexpected ident_missing_features"; | |
2249 | return -EINVAL; | |
2250 | } | |
2251 | ||
2252 | ceph_decode_64_safe(&p, end, missing_features, bad); | |
2253 | pr_err("RADOS feature set mismatch: server's required > my supported 0x%llx, missing 0x%llx\n", | |
2254 | client->supported_features, missing_features); | |
2255 | con->error_msg = "missing required protocol features"; | |
2256 | return -EINVAL; | |
2257 | ||
2258 | bad: | |
2259 | pr_err("failed to decode ident_missing_features\n"); | |
2260 | return -EINVAL; | |
2261 | } | |
2262 | ||
2263 | static int process_session_reconnect_ok(struct ceph_connection *con, | |
2264 | void *p, void *end) | |
2265 | { | |
2266 | u64 seq; | |
2267 | ||
2268 | if (con->state != CEPH_CON_S_V2_SESSION_RECONNECT) { | |
2269 | con->error_msg = "protocol error, unexpected session_reconnect_ok"; | |
2270 | return -EINVAL; | |
2271 | } | |
2272 | ||
2273 | ceph_decode_64_safe(&p, end, seq, bad); | |
2274 | ||
2275 | dout("%s con %p seq %llu\n", __func__, con, seq); | |
2276 | ceph_con_discard_requeued(con, seq); | |
2277 | ||
2278 | clear_in_sign_kvecs(con); | |
2279 | clear_out_sign_kvecs(con); | |
2280 | free_conn_bufs(con); | |
2281 | con->delay = 0; /* reset backoff memory */ | |
2282 | ||
2283 | con->state = CEPH_CON_S_OPEN; | |
2284 | con->v2.out_state = OUT_S_GET_NEXT; | |
2285 | return 0; | |
2286 | ||
2287 | bad: | |
2288 | pr_err("failed to decode session_reconnect_ok\n"); | |
2289 | return -EINVAL; | |
2290 | } | |
2291 | ||
2292 | static int process_session_retry(struct ceph_connection *con, | |
2293 | void *p, void *end) | |
2294 | { | |
2295 | u64 connect_seq; | |
2296 | int ret; | |
2297 | ||
2298 | if (con->state != CEPH_CON_S_V2_SESSION_RECONNECT) { | |
2299 | con->error_msg = "protocol error, unexpected session_retry"; | |
2300 | return -EINVAL; | |
2301 | } | |
2302 | ||
2303 | ceph_decode_64_safe(&p, end, connect_seq, bad); | |
2304 | ||
2305 | dout("%s con %p connect_seq %llu\n", __func__, con, connect_seq); | |
2306 | WARN_ON(connect_seq <= con->v2.connect_seq); | |
2307 | con->v2.connect_seq = connect_seq + 1; | |
2308 | ||
2309 | free_conn_bufs(con); | |
2310 | ||
2311 | reset_out_kvecs(con); | |
2312 | ret = prepare_session_reconnect(con); | |
2313 | if (ret) { | |
2314 | pr_err("prepare_session_reconnect (cseq) failed: %d\n", ret); | |
2315 | return ret; | |
2316 | } | |
2317 | ||
2318 | return 0; | |
2319 | ||
2320 | bad: | |
2321 | pr_err("failed to decode session_retry\n"); | |
2322 | return -EINVAL; | |
2323 | } | |
2324 | ||
2325 | static int process_session_retry_global(struct ceph_connection *con, | |
2326 | void *p, void *end) | |
2327 | { | |
2328 | u64 global_seq; | |
2329 | int ret; | |
2330 | ||
2331 | if (con->state != CEPH_CON_S_V2_SESSION_RECONNECT) { | |
2332 | con->error_msg = "protocol error, unexpected session_retry_global"; | |
2333 | return -EINVAL; | |
2334 | } | |
2335 | ||
2336 | ceph_decode_64_safe(&p, end, global_seq, bad); | |
2337 | ||
2338 | dout("%s con %p global_seq %llu\n", __func__, con, global_seq); | |
2339 | WARN_ON(global_seq <= con->v2.global_seq); | |
2340 | con->v2.global_seq = ceph_get_global_seq(con->msgr, global_seq); | |
2341 | ||
2342 | free_conn_bufs(con); | |
2343 | ||
2344 | reset_out_kvecs(con); | |
2345 | ret = prepare_session_reconnect(con); | |
2346 | if (ret) { | |
2347 | pr_err("prepare_session_reconnect (gseq) failed: %d\n", ret); | |
2348 | return ret; | |
2349 | } | |
2350 | ||
2351 | return 0; | |
2352 | ||
2353 | bad: | |
2354 | pr_err("failed to decode session_retry_global\n"); | |
2355 | return -EINVAL; | |
2356 | } | |
2357 | ||
2358 | static int process_session_reset(struct ceph_connection *con, | |
2359 | void *p, void *end) | |
2360 | { | |
2361 | bool full; | |
2362 | int ret; | |
2363 | ||
2364 | if (con->state != CEPH_CON_S_V2_SESSION_RECONNECT) { | |
2365 | con->error_msg = "protocol error, unexpected session_reset"; | |
2366 | return -EINVAL; | |
2367 | } | |
2368 | ||
2369 | ceph_decode_8_safe(&p, end, full, bad); | |
2370 | if (!full) { | |
2371 | con->error_msg = "protocol error, bad session_reset"; | |
2372 | return -EINVAL; | |
2373 | } | |
2374 | ||
2375 | pr_info("%s%lld %s session reset\n", ENTITY_NAME(con->peer_name), | |
2376 | ceph_pr_addr(&con->peer_addr)); | |
2377 | ceph_con_reset_session(con); | |
2378 | ||
2379 | mutex_unlock(&con->mutex); | |
2380 | if (con->ops->peer_reset) | |
2381 | con->ops->peer_reset(con); | |
2382 | mutex_lock(&con->mutex); | |
2383 | if (con->state != CEPH_CON_S_V2_SESSION_RECONNECT) { | |
2384 | dout("%s con %p state changed to %d\n", __func__, con, | |
2385 | con->state); | |
2386 | return -EAGAIN; | |
2387 | } | |
2388 | ||
2389 | free_conn_bufs(con); | |
2390 | ||
2391 | reset_out_kvecs(con); | |
2392 | ret = prepare_client_ident(con); | |
2393 | if (ret) { | |
2394 | pr_err("prepare_client_ident (rst) failed: %d\n", ret); | |
2395 | return ret; | |
2396 | } | |
2397 | ||
2398 | con->state = CEPH_CON_S_V2_SESSION_CONNECT; | |
2399 | return 0; | |
2400 | ||
2401 | bad: | |
2402 | pr_err("failed to decode session_reset\n"); | |
2403 | return -EINVAL; | |
2404 | } | |
2405 | ||
2406 | static int process_keepalive2_ack(struct ceph_connection *con, | |
2407 | void *p, void *end) | |
2408 | { | |
2409 | if (con->state != CEPH_CON_S_OPEN) { | |
2410 | con->error_msg = "protocol error, unexpected keepalive2_ack"; | |
2411 | return -EINVAL; | |
2412 | } | |
2413 | ||
2414 | ceph_decode_need(&p, end, sizeof(struct ceph_timespec), bad); | |
2415 | ceph_decode_timespec64(&con->last_keepalive_ack, p); | |
2416 | ||
2417 | dout("%s con %p timestamp %lld.%09ld\n", __func__, con, | |
2418 | con->last_keepalive_ack.tv_sec, con->last_keepalive_ack.tv_nsec); | |
2419 | ||
2420 | return 0; | |
2421 | ||
2422 | bad: | |
2423 | pr_err("failed to decode keepalive2_ack\n"); | |
2424 | return -EINVAL; | |
2425 | } | |
2426 | ||
2427 | static int process_ack(struct ceph_connection *con, void *p, void *end) | |
2428 | { | |
2429 | u64 seq; | |
2430 | ||
2431 | if (con->state != CEPH_CON_S_OPEN) { | |
2432 | con->error_msg = "protocol error, unexpected ack"; | |
2433 | return -EINVAL; | |
2434 | } | |
2435 | ||
2436 | ceph_decode_64_safe(&p, end, seq, bad); | |
2437 | ||
2438 | dout("%s con %p seq %llu\n", __func__, con, seq); | |
2439 | ceph_con_discard_sent(con, seq); | |
2440 | return 0; | |
2441 | ||
2442 | bad: | |
2443 | pr_err("failed to decode ack\n"); | |
2444 | return -EINVAL; | |
2445 | } | |
2446 | ||
2447 | static int process_control(struct ceph_connection *con, void *p, void *end) | |
2448 | { | |
2449 | int tag = con->v2.in_desc.fd_tag; | |
2450 | int ret; | |
2451 | ||
2452 | dout("%s con %p tag %d len %d\n", __func__, con, tag, (int)(end - p)); | |
2453 | ||
2454 | switch (tag) { | |
2455 | case FRAME_TAG_HELLO: | |
2456 | ret = process_hello(con, p, end); | |
2457 | break; | |
2458 | case FRAME_TAG_AUTH_BAD_METHOD: | |
2459 | ret = process_auth_bad_method(con, p, end); | |
2460 | break; | |
2461 | case FRAME_TAG_AUTH_REPLY_MORE: | |
2462 | ret = process_auth_reply_more(con, p, end); | |
2463 | break; | |
2464 | case FRAME_TAG_AUTH_DONE: | |
2465 | ret = process_auth_done(con, p, end); | |
2466 | break; | |
2467 | case FRAME_TAG_AUTH_SIGNATURE: | |
2468 | ret = process_auth_signature(con, p, end); | |
2469 | break; | |
2470 | case FRAME_TAG_SERVER_IDENT: | |
2471 | ret = process_server_ident(con, p, end); | |
2472 | break; | |
2473 | case FRAME_TAG_IDENT_MISSING_FEATURES: | |
2474 | ret = process_ident_missing_features(con, p, end); | |
2475 | break; | |
2476 | case FRAME_TAG_SESSION_RECONNECT_OK: | |
2477 | ret = process_session_reconnect_ok(con, p, end); | |
2478 | break; | |
2479 | case FRAME_TAG_SESSION_RETRY: | |
2480 | ret = process_session_retry(con, p, end); | |
2481 | break; | |
2482 | case FRAME_TAG_SESSION_RETRY_GLOBAL: | |
2483 | ret = process_session_retry_global(con, p, end); | |
2484 | break; | |
2485 | case FRAME_TAG_SESSION_RESET: | |
2486 | ret = process_session_reset(con, p, end); | |
2487 | break; | |
2488 | case FRAME_TAG_KEEPALIVE2_ACK: | |
2489 | ret = process_keepalive2_ack(con, p, end); | |
2490 | break; | |
2491 | case FRAME_TAG_ACK: | |
2492 | ret = process_ack(con, p, end); | |
2493 | break; | |
2494 | default: | |
2495 | pr_err("bad tag %d\n", tag); | |
2496 | con->error_msg = "protocol error, bad tag"; | |
2497 | return -EINVAL; | |
2498 | } | |
2499 | if (ret) { | |
2500 | dout("%s con %p error %d\n", __func__, con, ret); | |
2501 | return ret; | |
2502 | } | |
2503 | ||
2504 | prepare_read_preamble(con); | |
2505 | return 0; | |
2506 | } | |
2507 | ||
2508 | /* | |
2509 | * Return: | |
2510 | * 1 - con->in_msg set, read message | |
2511 | * 0 - skip message | |
2512 | * <0 - error | |
2513 | */ | |
2514 | static int process_message_header(struct ceph_connection *con, | |
2515 | void *p, void *end) | |
2516 | { | |
2517 | struct ceph_frame_desc *desc = &con->v2.in_desc; | |
2518 | struct ceph_msg_header2 *hdr2 = p; | |
2519 | struct ceph_msg_header hdr; | |
2520 | int skip; | |
2521 | int ret; | |
2522 | u64 seq; | |
2523 | ||
2524 | /* verify seq# */ | |
2525 | seq = le64_to_cpu(hdr2->seq); | |
2526 | if ((s64)seq - (s64)con->in_seq < 1) { | |
2527 | pr_info("%s%lld %s skipping old message: seq %llu, expected %llu\n", | |
2528 | ENTITY_NAME(con->peer_name), | |
2529 | ceph_pr_addr(&con->peer_addr), | |
2530 | seq, con->in_seq + 1); | |
2531 | return 0; | |
2532 | } | |
2533 | if ((s64)seq - (s64)con->in_seq > 1) { | |
2534 | pr_err("bad seq %llu, expected %llu\n", seq, con->in_seq + 1); | |
2535 | con->error_msg = "bad message sequence # for incoming message"; | |
2536 | return -EBADE; | |
2537 | } | |
2538 | ||
2539 | ceph_con_discard_sent(con, le64_to_cpu(hdr2->ack_seq)); | |
2540 | ||
2541 | fill_header(&hdr, hdr2, desc->fd_lens[1], desc->fd_lens[2], | |
2542 | desc->fd_lens[3], &con->peer_name); | |
2543 | ret = ceph_con_in_msg_alloc(con, &hdr, &skip); | |
2544 | if (ret) | |
2545 | return ret; | |
2546 | ||
2547 | WARN_ON(!con->in_msg ^ skip); | |
2548 | if (skip) | |
2549 | return 0; | |
2550 | ||
2551 | WARN_ON(!con->in_msg); | |
2552 | WARN_ON(con->in_msg->con != con); | |
2553 | return 1; | |
2554 | } | |
2555 | ||
2556 | static int process_message(struct ceph_connection *con) | |
2557 | { | |
2558 | ceph_con_process_message(con); | |
2559 | ||
2560 | /* | |
2561 | * We could have been closed by ceph_con_close() because | |
2562 | * ceph_con_process_message() temporarily drops con->mutex. | |
2563 | */ | |
2564 | if (con->state != CEPH_CON_S_OPEN) { | |
2565 | dout("%s con %p state changed to %d\n", __func__, con, | |
2566 | con->state); | |
2567 | return -EAGAIN; | |
2568 | } | |
2569 | ||
2570 | prepare_read_preamble(con); | |
2571 | return 0; | |
2572 | } | |
2573 | ||
2574 | static int __handle_control(struct ceph_connection *con, void *p) | |
2575 | { | |
2576 | void *end = p + con->v2.in_desc.fd_lens[0]; | |
2577 | struct ceph_msg *msg; | |
2578 | int ret; | |
2579 | ||
2580 | if (con->v2.in_desc.fd_tag != FRAME_TAG_MESSAGE) | |
2581 | return process_control(con, p, end); | |
2582 | ||
2583 | ret = process_message_header(con, p, end); | |
2584 | if (ret < 0) | |
2585 | return ret; | |
2586 | if (ret == 0) { | |
2587 | prepare_skip_message(con); | |
2588 | return 0; | |
2589 | } | |
2590 | ||
2591 | msg = con->in_msg; /* set in process_message_header() */ | |
2592 | if (!front_len(msg) && !middle_len(msg)) { | |
2593 | if (!data_len(msg)) | |
2594 | return process_message(con); | |
2595 | ||
2596 | prepare_read_data(con); | |
2597 | return 0; | |
2598 | } | |
2599 | ||
2600 | reset_in_kvecs(con); | |
2601 | if (front_len(msg)) { | |
2602 | WARN_ON(front_len(msg) > msg->front_alloc_len); | |
2603 | add_in_kvec(con, msg->front.iov_base, front_len(msg)); | |
2604 | msg->front.iov_len = front_len(msg); | |
2605 | ||
2606 | if (con_secure(con) && need_padding(front_len(msg))) | |
2607 | add_in_kvec(con, FRONT_PAD(con->v2.in_buf), | |
2608 | padding_len(front_len(msg))); | |
2609 | } else { | |
2610 | msg->front.iov_len = 0; | |
2611 | } | |
2612 | if (middle_len(msg)) { | |
2613 | WARN_ON(middle_len(msg) > msg->middle->alloc_len); | |
2614 | add_in_kvec(con, msg->middle->vec.iov_base, middle_len(msg)); | |
2615 | msg->middle->vec.iov_len = middle_len(msg); | |
2616 | ||
2617 | if (con_secure(con) && need_padding(middle_len(msg))) | |
2618 | add_in_kvec(con, MIDDLE_PAD(con->v2.in_buf), | |
2619 | padding_len(middle_len(msg))); | |
2620 | } else if (msg->middle) { | |
2621 | msg->middle->vec.iov_len = 0; | |
2622 | } | |
2623 | ||
2624 | if (data_len(msg)) { | |
2625 | con->v2.in_state = IN_S_PREPARE_READ_DATA; | |
2626 | } else { | |
2627 | add_in_kvec(con, con->v2.in_buf, | |
2628 | con_secure(con) ? CEPH_EPILOGUE_SECURE_LEN : | |
2629 | CEPH_EPILOGUE_PLAIN_LEN); | |
2630 | con->v2.in_state = IN_S_HANDLE_EPILOGUE; | |
2631 | } | |
2632 | return 0; | |
2633 | } | |
2634 | ||
2635 | static int handle_preamble(struct ceph_connection *con) | |
2636 | { | |
2637 | struct ceph_frame_desc *desc = &con->v2.in_desc; | |
2638 | int ret; | |
2639 | ||
2640 | if (con_secure(con)) { | |
2641 | ret = decrypt_preamble(con); | |
2642 | if (ret) { | |
2643 | if (ret == -EBADMSG) | |
2644 | con->error_msg = "integrity error, bad preamble auth tag"; | |
2645 | return ret; | |
2646 | } | |
2647 | } | |
2648 | ||
2649 | ret = decode_preamble(con->v2.in_buf, desc); | |
2650 | if (ret) { | |
2651 | if (ret == -EBADMSG) | |
2652 | con->error_msg = "integrity error, bad crc"; | |
2653 | else | |
2654 | con->error_msg = "protocol error, bad preamble"; | |
2655 | return ret; | |
2656 | } | |
2657 | ||
2658 | dout("%s con %p tag %d seg_cnt %d %d+%d+%d+%d\n", __func__, | |
2659 | con, desc->fd_tag, desc->fd_seg_cnt, desc->fd_lens[0], | |
2660 | desc->fd_lens[1], desc->fd_lens[2], desc->fd_lens[3]); | |
2661 | ||
2662 | if (!con_secure(con)) | |
2663 | return prepare_read_control(con); | |
2664 | ||
2665 | if (desc->fd_lens[0] > CEPH_PREAMBLE_INLINE_LEN) | |
2666 | return prepare_read_control_remainder(con); | |
2667 | ||
2668 | return __handle_control(con, CTRL_BODY(con->v2.in_buf)); | |
2669 | } | |
2670 | ||
2671 | static int handle_control(struct ceph_connection *con) | |
2672 | { | |
2673 | int ctrl_len = con->v2.in_desc.fd_lens[0]; | |
2674 | void *buf; | |
2675 | int ret; | |
2676 | ||
2677 | WARN_ON(con_secure(con)); | |
2678 | ||
2679 | ret = verify_control_crc(con); | |
2680 | if (ret) { | |
2681 | con->error_msg = "integrity error, bad crc"; | |
2682 | return ret; | |
2683 | } | |
2684 | ||
2685 | if (con->state == CEPH_CON_S_V2_AUTH) { | |
2686 | buf = alloc_conn_buf(con, ctrl_len); | |
2687 | if (!buf) | |
2688 | return -ENOMEM; | |
2689 | ||
2690 | memcpy(buf, con->v2.in_kvecs[0].iov_base, ctrl_len); | |
2691 | return __handle_control(con, buf); | |
2692 | } | |
2693 | ||
2694 | return __handle_control(con, con->v2.in_kvecs[0].iov_base); | |
2695 | } | |
2696 | ||
2697 | static int handle_control_remainder(struct ceph_connection *con) | |
2698 | { | |
2699 | int ret; | |
2700 | ||
2701 | WARN_ON(!con_secure(con)); | |
2702 | ||
2703 | ret = decrypt_control_remainder(con); | |
2704 | if (ret) { | |
2705 | if (ret == -EBADMSG) | |
2706 | con->error_msg = "integrity error, bad control remainder auth tag"; | |
2707 | return ret; | |
2708 | } | |
2709 | ||
2710 | return __handle_control(con, con->v2.in_kvecs[0].iov_base - | |
2711 | CEPH_PREAMBLE_INLINE_LEN); | |
2712 | } | |
2713 | ||
2714 | static int handle_epilogue(struct ceph_connection *con) | |
2715 | { | |
2716 | u32 front_crc, middle_crc, data_crc; | |
2717 | int ret; | |
2718 | ||
2719 | if (con_secure(con)) { | |
2720 | ret = decrypt_message(con); | |
2721 | if (ret) { | |
2722 | if (ret == -EBADMSG) | |
2723 | con->error_msg = "integrity error, bad epilogue auth tag"; | |
2724 | return ret; | |
2725 | } | |
2726 | ||
2727 | /* just late_status */ | |
2728 | ret = decode_epilogue(con->v2.in_buf, NULL, NULL, NULL); | |
2729 | if (ret) { | |
2730 | con->error_msg = "protocol error, bad epilogue"; | |
2731 | return ret; | |
2732 | } | |
2733 | } else { | |
2734 | ret = decode_epilogue(con->v2.in_buf, &front_crc, | |
2735 | &middle_crc, &data_crc); | |
2736 | if (ret) { | |
2737 | con->error_msg = "protocol error, bad epilogue"; | |
2738 | return ret; | |
2739 | } | |
2740 | ||
2741 | ret = verify_epilogue_crcs(con, front_crc, middle_crc, | |
2742 | data_crc); | |
2743 | if (ret) { | |
2744 | con->error_msg = "integrity error, bad crc"; | |
2745 | return ret; | |
2746 | } | |
2747 | } | |
2748 | ||
2749 | return process_message(con); | |
2750 | } | |
2751 | ||
2752 | static void finish_skip(struct ceph_connection *con) | |
2753 | { | |
2754 | dout("%s con %p\n", __func__, con); | |
2755 | ||
2756 | if (con_secure(con)) | |
2757 | gcm_inc_nonce(&con->v2.in_gcm_nonce); | |
2758 | ||
2759 | __finish_skip(con); | |
2760 | } | |
2761 | ||
2762 | static int populate_in_iter(struct ceph_connection *con) | |
2763 | { | |
2764 | int ret; | |
2765 | ||
2766 | dout("%s con %p state %d in_state %d\n", __func__, con, con->state, | |
2767 | con->v2.in_state); | |
2768 | WARN_ON(iov_iter_count(&con->v2.in_iter)); | |
2769 | ||
2770 | if (con->state == CEPH_CON_S_V2_BANNER_PREFIX) { | |
2771 | ret = process_banner_prefix(con); | |
2772 | } else if (con->state == CEPH_CON_S_V2_BANNER_PAYLOAD) { | |
2773 | ret = process_banner_payload(con); | |
2774 | } else if ((con->state >= CEPH_CON_S_V2_HELLO && | |
2775 | con->state <= CEPH_CON_S_V2_SESSION_RECONNECT) || | |
2776 | con->state == CEPH_CON_S_OPEN) { | |
2777 | switch (con->v2.in_state) { | |
2778 | case IN_S_HANDLE_PREAMBLE: | |
2779 | ret = handle_preamble(con); | |
2780 | break; | |
2781 | case IN_S_HANDLE_CONTROL: | |
2782 | ret = handle_control(con); | |
2783 | break; | |
2784 | case IN_S_HANDLE_CONTROL_REMAINDER: | |
2785 | ret = handle_control_remainder(con); | |
2786 | break; | |
2787 | case IN_S_PREPARE_READ_DATA: | |
2788 | prepare_read_data(con); | |
2789 | ret = 0; | |
2790 | break; | |
2791 | case IN_S_PREPARE_READ_DATA_CONT: | |
2792 | prepare_read_data_cont(con); | |
2793 | ret = 0; | |
2794 | break; | |
2795 | case IN_S_HANDLE_EPILOGUE: | |
2796 | ret = handle_epilogue(con); | |
2797 | break; | |
2798 | case IN_S_FINISH_SKIP: | |
2799 | finish_skip(con); | |
2800 | ret = 0; | |
2801 | break; | |
2802 | default: | |
2803 | WARN(1, "bad in_state %d", con->v2.in_state); | |
2804 | return -EINVAL; | |
2805 | } | |
2806 | } else { | |
2807 | WARN(1, "bad state %d", con->state); | |
2808 | return -EINVAL; | |
2809 | } | |
2810 | if (ret) { | |
2811 | dout("%s con %p error %d\n", __func__, con, ret); | |
2812 | return ret; | |
2813 | } | |
2814 | ||
2815 | if (WARN_ON(!iov_iter_count(&con->v2.in_iter))) | |
2816 | return -ENODATA; | |
2817 | dout("%s con %p populated %zu\n", __func__, con, | |
2818 | iov_iter_count(&con->v2.in_iter)); | |
2819 | return 1; | |
2820 | } | |
2821 | ||
2822 | int ceph_con_v2_try_read(struct ceph_connection *con) | |
2823 | { | |
2824 | int ret; | |
2825 | ||
2826 | dout("%s con %p state %d need %zu\n", __func__, con, con->state, | |
2827 | iov_iter_count(&con->v2.in_iter)); | |
2828 | ||
2829 | if (con->state == CEPH_CON_S_PREOPEN) | |
2830 | return 0; | |
2831 | ||
2832 | /* | |
2833 | * We should always have something pending here. If not, | |
2834 | * avoid calling populate_in_iter() as if we read something | |
2835 | * (ceph_tcp_recv() would immediately return 1). | |
2836 | */ | |
2837 | if (WARN_ON(!iov_iter_count(&con->v2.in_iter))) | |
2838 | return -ENODATA; | |
2839 | ||
2840 | for (;;) { | |
2841 | ret = ceph_tcp_recv(con); | |
2842 | if (ret <= 0) | |
2843 | return ret; | |
2844 | ||
2845 | ret = populate_in_iter(con); | |
2846 | if (ret <= 0) { | |
2847 | if (ret && ret != -EAGAIN && !con->error_msg) | |
2848 | con->error_msg = "read processing error"; | |
2849 | return ret; | |
2850 | } | |
2851 | } | |
2852 | } | |
2853 | ||
2854 | static void queue_data(struct ceph_connection *con) | |
2855 | { | |
2856 | struct bio_vec bv; | |
2857 | ||
2858 | con->v2.out_epil.data_crc = -1; | |
2859 | ceph_msg_data_cursor_init(&con->v2.out_cursor, con->out_msg, | |
2860 | data_len(con->out_msg)); | |
2861 | ||
2862 | get_bvec_at(&con->v2.out_cursor, &bv); | |
2863 | set_out_bvec(con, &bv, true); | |
2864 | con->v2.out_state = OUT_S_QUEUE_DATA_CONT; | |
2865 | } | |
2866 | ||
2867 | static void queue_data_cont(struct ceph_connection *con) | |
2868 | { | |
2869 | struct bio_vec bv; | |
2870 | ||
2871 | con->v2.out_epil.data_crc = ceph_crc32c_page( | |
2872 | con->v2.out_epil.data_crc, con->v2.out_bvec.bv_page, | |
2873 | con->v2.out_bvec.bv_offset, con->v2.out_bvec.bv_len); | |
2874 | ||
2875 | ceph_msg_data_advance(&con->v2.out_cursor, con->v2.out_bvec.bv_len); | |
2876 | if (con->v2.out_cursor.total_resid) { | |
2877 | get_bvec_at(&con->v2.out_cursor, &bv); | |
2878 | set_out_bvec(con, &bv, true); | |
2879 | WARN_ON(con->v2.out_state != OUT_S_QUEUE_DATA_CONT); | |
2880 | return; | |
2881 | } | |
2882 | ||
2883 | /* | |
2884 | * We've written all data. Queue epilogue. Once it's written, | |
2885 | * we are done. | |
2886 | */ | |
2887 | reset_out_kvecs(con); | |
2888 | prepare_epilogue_plain(con, false); | |
2889 | con->v2.out_state = OUT_S_FINISH_MESSAGE; | |
2890 | } | |
2891 | ||
2892 | static void queue_enc_page(struct ceph_connection *con) | |
2893 | { | |
2894 | struct bio_vec bv; | |
2895 | ||
2896 | dout("%s con %p i %d resid %d\n", __func__, con, con->v2.out_enc_i, | |
2897 | con->v2.out_enc_resid); | |
2898 | WARN_ON(!con->v2.out_enc_resid); | |
2899 | ||
2900 | bv.bv_page = con->v2.out_enc_pages[con->v2.out_enc_i]; | |
2901 | bv.bv_offset = 0; | |
2902 | bv.bv_len = min(con->v2.out_enc_resid, (int)PAGE_SIZE); | |
2903 | ||
2904 | set_out_bvec(con, &bv, false); | |
2905 | con->v2.out_enc_i++; | |
2906 | con->v2.out_enc_resid -= bv.bv_len; | |
2907 | ||
2908 | if (con->v2.out_enc_resid) { | |
2909 | WARN_ON(con->v2.out_state != OUT_S_QUEUE_ENC_PAGE); | |
2910 | return; | |
2911 | } | |
2912 | ||
2913 | /* | |
2914 | * We've queued the last piece of ciphertext (ending with | |
2915 | * epilogue) + auth tag. Once it's written, we are done. | |
2916 | */ | |
2917 | WARN_ON(con->v2.out_enc_i != con->v2.out_enc_page_cnt); | |
2918 | con->v2.out_state = OUT_S_FINISH_MESSAGE; | |
2919 | } | |
2920 | ||
2921 | static void queue_zeros(struct ceph_connection *con) | |
2922 | { | |
2923 | dout("%s con %p out_zero %d\n", __func__, con, con->v2.out_zero); | |
2924 | ||
2925 | if (con->v2.out_zero) { | |
2926 | set_out_bvec_zero(con); | |
2927 | con->v2.out_zero -= con->v2.out_bvec.bv_len; | |
2928 | con->v2.out_state = OUT_S_QUEUE_ZEROS; | |
2929 | return; | |
2930 | } | |
2931 | ||
2932 | /* | |
2933 | * We've zero-filled everything up to epilogue. Queue epilogue | |
2934 | * with late_status set to ABORTED and crcs adjusted for zeros. | |
2935 | * Once it's written, we are done patching up for the revoke. | |
2936 | */ | |
2937 | reset_out_kvecs(con); | |
2938 | prepare_epilogue_plain(con, true); | |
2939 | con->v2.out_state = OUT_S_FINISH_MESSAGE; | |
2940 | } | |
2941 | ||
2942 | static void finish_message(struct ceph_connection *con) | |
2943 | { | |
2944 | dout("%s con %p msg %p\n", __func__, con, con->out_msg); | |
2945 | ||
2946 | /* we end up here both plain and secure modes */ | |
2947 | if (con->v2.out_enc_pages) { | |
2948 | WARN_ON(!con->v2.out_enc_page_cnt); | |
2949 | ceph_release_page_vector(con->v2.out_enc_pages, | |
2950 | con->v2.out_enc_page_cnt); | |
2951 | con->v2.out_enc_pages = NULL; | |
2952 | con->v2.out_enc_page_cnt = 0; | |
2953 | } | |
2954 | /* message may have been revoked */ | |
2955 | if (con->out_msg) { | |
2956 | ceph_msg_put(con->out_msg); | |
2957 | con->out_msg = NULL; | |
2958 | } | |
2959 | ||
2960 | con->v2.out_state = OUT_S_GET_NEXT; | |
2961 | } | |
2962 | ||
2963 | static int populate_out_iter(struct ceph_connection *con) | |
2964 | { | |
2965 | int ret; | |
2966 | ||
2967 | dout("%s con %p state %d out_state %d\n", __func__, con, con->state, | |
2968 | con->v2.out_state); | |
2969 | WARN_ON(iov_iter_count(&con->v2.out_iter)); | |
2970 | ||
2971 | if (con->state != CEPH_CON_S_OPEN) { | |
2972 | WARN_ON(con->state < CEPH_CON_S_V2_BANNER_PREFIX || | |
2973 | con->state > CEPH_CON_S_V2_SESSION_RECONNECT); | |
2974 | goto nothing_pending; | |
2975 | } | |
2976 | ||
2977 | switch (con->v2.out_state) { | |
2978 | case OUT_S_QUEUE_DATA: | |
2979 | WARN_ON(!con->out_msg); | |
2980 | queue_data(con); | |
2981 | goto populated; | |
2982 | case OUT_S_QUEUE_DATA_CONT: | |
2983 | WARN_ON(!con->out_msg); | |
2984 | queue_data_cont(con); | |
2985 | goto populated; | |
2986 | case OUT_S_QUEUE_ENC_PAGE: | |
2987 | queue_enc_page(con); | |
2988 | goto populated; | |
2989 | case OUT_S_QUEUE_ZEROS: | |
2990 | WARN_ON(con->out_msg); /* revoked */ | |
2991 | queue_zeros(con); | |
2992 | goto populated; | |
2993 | case OUT_S_FINISH_MESSAGE: | |
2994 | finish_message(con); | |
2995 | break; | |
2996 | case OUT_S_GET_NEXT: | |
2997 | break; | |
2998 | default: | |
2999 | WARN(1, "bad out_state %d", con->v2.out_state); | |
3000 | return -EINVAL; | |
3001 | } | |
3002 | ||
3003 | WARN_ON(con->v2.out_state != OUT_S_GET_NEXT); | |
3004 | if (ceph_con_flag_test_and_clear(con, CEPH_CON_F_KEEPALIVE_PENDING)) { | |
3005 | ret = prepare_keepalive2(con); | |
3006 | if (ret) { | |
3007 | pr_err("prepare_keepalive2 failed: %d\n", ret); | |
3008 | return ret; | |
3009 | } | |
3010 | } else if (!list_empty(&con->out_queue)) { | |
3011 | ceph_con_get_out_msg(con); | |
3012 | ret = prepare_message(con); | |
3013 | if (ret) { | |
3014 | pr_err("prepare_message failed: %d\n", ret); | |
3015 | return ret; | |
3016 | } | |
3017 | } else if (con->in_seq > con->in_seq_acked) { | |
3018 | ret = prepare_ack(con); | |
3019 | if (ret) { | |
3020 | pr_err("prepare_ack failed: %d\n", ret); | |
3021 | return ret; | |
3022 | } | |
3023 | } else { | |
3024 | goto nothing_pending; | |
3025 | } | |
3026 | ||
3027 | populated: | |
3028 | if (WARN_ON(!iov_iter_count(&con->v2.out_iter))) | |
3029 | return -ENODATA; | |
3030 | dout("%s con %p populated %zu\n", __func__, con, | |
3031 | iov_iter_count(&con->v2.out_iter)); | |
3032 | return 1; | |
3033 | ||
3034 | nothing_pending: | |
3035 | WARN_ON(iov_iter_count(&con->v2.out_iter)); | |
3036 | dout("%s con %p nothing pending\n", __func__, con); | |
3037 | ceph_con_flag_clear(con, CEPH_CON_F_WRITE_PENDING); | |
3038 | return 0; | |
3039 | } | |
3040 | ||
3041 | int ceph_con_v2_try_write(struct ceph_connection *con) | |
3042 | { | |
3043 | int ret; | |
3044 | ||
3045 | dout("%s con %p state %d have %zu\n", __func__, con, con->state, | |
3046 | iov_iter_count(&con->v2.out_iter)); | |
3047 | ||
3048 | /* open the socket first? */ | |
3049 | if (con->state == CEPH_CON_S_PREOPEN) { | |
3050 | WARN_ON(con->peer_addr.type != CEPH_ENTITY_ADDR_TYPE_MSGR2); | |
3051 | ||
3052 | /* | |
3053 | * Always bump global_seq. Bump connect_seq only if | |
3054 | * there is a session (i.e. we are reconnecting and will | |
3055 | * send session_reconnect instead of client_ident). | |
3056 | */ | |
3057 | con->v2.global_seq = ceph_get_global_seq(con->msgr, 0); | |
3058 | if (con->v2.server_cookie) | |
3059 | con->v2.connect_seq++; | |
3060 | ||
3061 | ret = prepare_read_banner_prefix(con); | |
3062 | if (ret) { | |
3063 | pr_err("prepare_read_banner_prefix failed: %d\n", ret); | |
3064 | con->error_msg = "connect error"; | |
3065 | return ret; | |
3066 | } | |
3067 | ||
3068 | reset_out_kvecs(con); | |
3069 | ret = prepare_banner(con); | |
3070 | if (ret) { | |
3071 | pr_err("prepare_banner failed: %d\n", ret); | |
3072 | con->error_msg = "connect error"; | |
3073 | return ret; | |
3074 | } | |
3075 | ||
3076 | ret = ceph_tcp_connect(con); | |
3077 | if (ret) { | |
3078 | pr_err("ceph_tcp_connect failed: %d\n", ret); | |
3079 | con->error_msg = "connect error"; | |
3080 | return ret; | |
3081 | } | |
3082 | } | |
3083 | ||
3084 | if (!iov_iter_count(&con->v2.out_iter)) { | |
3085 | ret = populate_out_iter(con); | |
3086 | if (ret <= 0) { | |
3087 | if (ret && ret != -EAGAIN && !con->error_msg) | |
3088 | con->error_msg = "write processing error"; | |
3089 | return ret; | |
3090 | } | |
3091 | } | |
3092 | ||
3093 | tcp_sock_set_cork(con->sock->sk, true); | |
3094 | for (;;) { | |
3095 | ret = ceph_tcp_send(con); | |
3096 | if (ret <= 0) | |
3097 | break; | |
3098 | ||
3099 | ret = populate_out_iter(con); | |
3100 | if (ret <= 0) { | |
3101 | if (ret && ret != -EAGAIN && !con->error_msg) | |
3102 | con->error_msg = "write processing error"; | |
3103 | break; | |
3104 | } | |
3105 | } | |
3106 | ||
3107 | tcp_sock_set_cork(con->sock->sk, false); | |
3108 | return ret; | |
3109 | } | |
3110 | ||
3111 | static u32 crc32c_zeros(u32 crc, int zero_len) | |
3112 | { | |
3113 | int len; | |
3114 | ||
3115 | while (zero_len) { | |
3116 | len = min(zero_len, (int)PAGE_SIZE); | |
3117 | crc = crc32c(crc, page_address(ceph_zero_page), len); | |
3118 | zero_len -= len; | |
3119 | } | |
3120 | ||
3121 | return crc; | |
3122 | } | |
3123 | ||
3124 | static void prepare_zero_front(struct ceph_connection *con, int resid) | |
3125 | { | |
3126 | int sent; | |
3127 | ||
3128 | WARN_ON(!resid || resid > front_len(con->out_msg)); | |
3129 | sent = front_len(con->out_msg) - resid; | |
3130 | dout("%s con %p sent %d resid %d\n", __func__, con, sent, resid); | |
3131 | ||
3132 | if (sent) { | |
3133 | con->v2.out_epil.front_crc = | |
3134 | crc32c(-1, con->out_msg->front.iov_base, sent); | |
3135 | con->v2.out_epil.front_crc = | |
3136 | crc32c_zeros(con->v2.out_epil.front_crc, resid); | |
3137 | } else { | |
3138 | con->v2.out_epil.front_crc = crc32c_zeros(-1, resid); | |
3139 | } | |
3140 | ||
3141 | con->v2.out_iter.count -= resid; | |
3142 | out_zero_add(con, resid); | |
3143 | } | |
3144 | ||
3145 | static void prepare_zero_middle(struct ceph_connection *con, int resid) | |
3146 | { | |
3147 | int sent; | |
3148 | ||
3149 | WARN_ON(!resid || resid > middle_len(con->out_msg)); | |
3150 | sent = middle_len(con->out_msg) - resid; | |
3151 | dout("%s con %p sent %d resid %d\n", __func__, con, sent, resid); | |
3152 | ||
3153 | if (sent) { | |
3154 | con->v2.out_epil.middle_crc = | |
3155 | crc32c(-1, con->out_msg->middle->vec.iov_base, sent); | |
3156 | con->v2.out_epil.middle_crc = | |
3157 | crc32c_zeros(con->v2.out_epil.middle_crc, resid); | |
3158 | } else { | |
3159 | con->v2.out_epil.middle_crc = crc32c_zeros(-1, resid); | |
3160 | } | |
3161 | ||
3162 | con->v2.out_iter.count -= resid; | |
3163 | out_zero_add(con, resid); | |
3164 | } | |
3165 | ||
3166 | static void prepare_zero_data(struct ceph_connection *con) | |
3167 | { | |
3168 | dout("%s con %p\n", __func__, con); | |
3169 | con->v2.out_epil.data_crc = crc32c_zeros(-1, data_len(con->out_msg)); | |
3170 | out_zero_add(con, data_len(con->out_msg)); | |
3171 | } | |
3172 | ||
3173 | static void revoke_at_queue_data(struct ceph_connection *con) | |
3174 | { | |
3175 | int boundary; | |
3176 | int resid; | |
3177 | ||
3178 | WARN_ON(!data_len(con->out_msg)); | |
3179 | WARN_ON(!iov_iter_is_kvec(&con->v2.out_iter)); | |
3180 | resid = iov_iter_count(&con->v2.out_iter); | |
3181 | ||
3182 | boundary = front_len(con->out_msg) + middle_len(con->out_msg); | |
3183 | if (resid > boundary) { | |
3184 | resid -= boundary; | |
3185 | WARN_ON(resid > MESSAGE_HEAD_PLAIN_LEN); | |
3186 | dout("%s con %p was sending head\n", __func__, con); | |
3187 | if (front_len(con->out_msg)) | |
3188 | prepare_zero_front(con, front_len(con->out_msg)); | |
3189 | if (middle_len(con->out_msg)) | |
3190 | prepare_zero_middle(con, middle_len(con->out_msg)); | |
3191 | prepare_zero_data(con); | |
3192 | WARN_ON(iov_iter_count(&con->v2.out_iter) != resid); | |
3193 | con->v2.out_state = OUT_S_QUEUE_ZEROS; | |
3194 | return; | |
3195 | } | |
3196 | ||
3197 | boundary = middle_len(con->out_msg); | |
3198 | if (resid > boundary) { | |
3199 | resid -= boundary; | |
3200 | dout("%s con %p was sending front\n", __func__, con); | |
3201 | prepare_zero_front(con, resid); | |
3202 | if (middle_len(con->out_msg)) | |
3203 | prepare_zero_middle(con, middle_len(con->out_msg)); | |
3204 | prepare_zero_data(con); | |
3205 | queue_zeros(con); | |
3206 | return; | |
3207 | } | |
3208 | ||
3209 | WARN_ON(!resid); | |
3210 | dout("%s con %p was sending middle\n", __func__, con); | |
3211 | prepare_zero_middle(con, resid); | |
3212 | prepare_zero_data(con); | |
3213 | queue_zeros(con); | |
3214 | } | |
3215 | ||
3216 | static void revoke_at_queue_data_cont(struct ceph_connection *con) | |
3217 | { | |
3218 | int sent, resid; /* current piece of data */ | |
3219 | ||
3220 | WARN_ON(!data_len(con->out_msg)); | |
3221 | WARN_ON(!iov_iter_is_bvec(&con->v2.out_iter)); | |
3222 | resid = iov_iter_count(&con->v2.out_iter); | |
3223 | WARN_ON(!resid || resid > con->v2.out_bvec.bv_len); | |
3224 | sent = con->v2.out_bvec.bv_len - resid; | |
3225 | dout("%s con %p sent %d resid %d\n", __func__, con, sent, resid); | |
3226 | ||
3227 | if (sent) { | |
3228 | con->v2.out_epil.data_crc = ceph_crc32c_page( | |
3229 | con->v2.out_epil.data_crc, con->v2.out_bvec.bv_page, | |
3230 | con->v2.out_bvec.bv_offset, sent); | |
3231 | ceph_msg_data_advance(&con->v2.out_cursor, sent); | |
3232 | } | |
3233 | WARN_ON(resid > con->v2.out_cursor.total_resid); | |
3234 | con->v2.out_epil.data_crc = crc32c_zeros(con->v2.out_epil.data_crc, | |
3235 | con->v2.out_cursor.total_resid); | |
3236 | ||
3237 | con->v2.out_iter.count -= resid; | |
3238 | out_zero_add(con, con->v2.out_cursor.total_resid); | |
3239 | queue_zeros(con); | |
3240 | } | |
3241 | ||
3242 | static void revoke_at_finish_message(struct ceph_connection *con) | |
3243 | { | |
3244 | int boundary; | |
3245 | int resid; | |
3246 | ||
3247 | WARN_ON(!iov_iter_is_kvec(&con->v2.out_iter)); | |
3248 | resid = iov_iter_count(&con->v2.out_iter); | |
3249 | ||
3250 | if (!front_len(con->out_msg) && !middle_len(con->out_msg) && | |
3251 | !data_len(con->out_msg)) { | |
3252 | WARN_ON(!resid || resid > MESSAGE_HEAD_PLAIN_LEN); | |
3253 | dout("%s con %p was sending head (empty message) - noop\n", | |
3254 | __func__, con); | |
3255 | return; | |
3256 | } | |
3257 | ||
3258 | boundary = front_len(con->out_msg) + middle_len(con->out_msg) + | |
3259 | CEPH_EPILOGUE_PLAIN_LEN; | |
3260 | if (resid > boundary) { | |
3261 | resid -= boundary; | |
3262 | WARN_ON(resid > MESSAGE_HEAD_PLAIN_LEN); | |
3263 | dout("%s con %p was sending head\n", __func__, con); | |
3264 | if (front_len(con->out_msg)) | |
3265 | prepare_zero_front(con, front_len(con->out_msg)); | |
3266 | if (middle_len(con->out_msg)) | |
3267 | prepare_zero_middle(con, middle_len(con->out_msg)); | |
3268 | con->v2.out_iter.count -= CEPH_EPILOGUE_PLAIN_LEN; | |
3269 | WARN_ON(iov_iter_count(&con->v2.out_iter) != resid); | |
3270 | con->v2.out_state = OUT_S_QUEUE_ZEROS; | |
3271 | return; | |
3272 | } | |
3273 | ||
3274 | boundary = middle_len(con->out_msg) + CEPH_EPILOGUE_PLAIN_LEN; | |
3275 | if (resid > boundary) { | |
3276 | resid -= boundary; | |
3277 | dout("%s con %p was sending front\n", __func__, con); | |
3278 | prepare_zero_front(con, resid); | |
3279 | if (middle_len(con->out_msg)) | |
3280 | prepare_zero_middle(con, middle_len(con->out_msg)); | |
3281 | con->v2.out_iter.count -= CEPH_EPILOGUE_PLAIN_LEN; | |
3282 | queue_zeros(con); | |
3283 | return; | |
3284 | } | |
3285 | ||
3286 | boundary = CEPH_EPILOGUE_PLAIN_LEN; | |
3287 | if (resid > boundary) { | |
3288 | resid -= boundary; | |
3289 | dout("%s con %p was sending middle\n", __func__, con); | |
3290 | prepare_zero_middle(con, resid); | |
3291 | con->v2.out_iter.count -= CEPH_EPILOGUE_PLAIN_LEN; | |
3292 | queue_zeros(con); | |
3293 | return; | |
3294 | } | |
3295 | ||
3296 | WARN_ON(!resid); | |
3297 | dout("%s con %p was sending epilogue - noop\n", __func__, con); | |
3298 | } | |
3299 | ||
3300 | void ceph_con_v2_revoke(struct ceph_connection *con) | |
3301 | { | |
3302 | WARN_ON(con->v2.out_zero); | |
3303 | ||
3304 | if (con_secure(con)) { | |
3305 | WARN_ON(con->v2.out_state != OUT_S_QUEUE_ENC_PAGE && | |
3306 | con->v2.out_state != OUT_S_FINISH_MESSAGE); | |
3307 | dout("%s con %p secure - noop\n", __func__, con); | |
3308 | return; | |
3309 | } | |
3310 | ||
3311 | switch (con->v2.out_state) { | |
3312 | case OUT_S_QUEUE_DATA: | |
3313 | revoke_at_queue_data(con); | |
3314 | break; | |
3315 | case OUT_S_QUEUE_DATA_CONT: | |
3316 | revoke_at_queue_data_cont(con); | |
3317 | break; | |
3318 | case OUT_S_FINISH_MESSAGE: | |
3319 | revoke_at_finish_message(con); | |
3320 | break; | |
3321 | default: | |
3322 | WARN(1, "bad out_state %d", con->v2.out_state); | |
3323 | break; | |
3324 | } | |
3325 | } | |
3326 | ||
3327 | static void revoke_at_prepare_read_data(struct ceph_connection *con) | |
3328 | { | |
3329 | int remaining; /* data + [data padding] + epilogue */ | |
3330 | int resid; | |
3331 | ||
3332 | WARN_ON(!data_len(con->in_msg)); | |
3333 | WARN_ON(!iov_iter_is_kvec(&con->v2.in_iter)); | |
3334 | resid = iov_iter_count(&con->v2.in_iter); | |
3335 | WARN_ON(!resid); | |
3336 | ||
3337 | if (con_secure(con)) | |
3338 | remaining = padded_len(data_len(con->in_msg)) + | |
3339 | CEPH_EPILOGUE_SECURE_LEN; | |
3340 | else | |
3341 | remaining = data_len(con->in_msg) + CEPH_EPILOGUE_PLAIN_LEN; | |
3342 | ||
3343 | dout("%s con %p resid %d remaining %d\n", __func__, con, resid, | |
3344 | remaining); | |
3345 | con->v2.in_iter.count -= resid; | |
3346 | set_in_skip(con, resid + remaining); | |
3347 | con->v2.in_state = IN_S_FINISH_SKIP; | |
3348 | } | |
3349 | ||
3350 | static void revoke_at_prepare_read_data_cont(struct ceph_connection *con) | |
3351 | { | |
3352 | int recved, resid; /* current piece of data */ | |
3353 | int remaining; /* [data padding] + epilogue */ | |
3354 | ||
3355 | WARN_ON(!data_len(con->in_msg)); | |
3356 | WARN_ON(!iov_iter_is_bvec(&con->v2.in_iter)); | |
3357 | resid = iov_iter_count(&con->v2.in_iter); | |
3358 | WARN_ON(!resid || resid > con->v2.in_bvec.bv_len); | |
3359 | recved = con->v2.in_bvec.bv_len - resid; | |
3360 | dout("%s con %p recved %d resid %d\n", __func__, con, recved, resid); | |
3361 | ||
3362 | if (recved) | |
3363 | ceph_msg_data_advance(&con->v2.in_cursor, recved); | |
3364 | WARN_ON(resid > con->v2.in_cursor.total_resid); | |
3365 | ||
3366 | if (con_secure(con)) | |
3367 | remaining = padding_len(data_len(con->in_msg)) + | |
3368 | CEPH_EPILOGUE_SECURE_LEN; | |
3369 | else | |
3370 | remaining = CEPH_EPILOGUE_PLAIN_LEN; | |
3371 | ||
3372 | dout("%s con %p total_resid %zu remaining %d\n", __func__, con, | |
3373 | con->v2.in_cursor.total_resid, remaining); | |
3374 | con->v2.in_iter.count -= resid; | |
3375 | set_in_skip(con, con->v2.in_cursor.total_resid + remaining); | |
3376 | con->v2.in_state = IN_S_FINISH_SKIP; | |
3377 | } | |
3378 | ||
3379 | static void revoke_at_handle_epilogue(struct ceph_connection *con) | |
3380 | { | |
3381 | int resid; | |
3382 | ||
3383 | WARN_ON(!iov_iter_is_kvec(&con->v2.in_iter)); | |
3384 | resid = iov_iter_count(&con->v2.in_iter); | |
3385 | WARN_ON(!resid); | |
3386 | ||
3387 | dout("%s con %p resid %d\n", __func__, con, resid); | |
3388 | con->v2.in_iter.count -= resid; | |
3389 | set_in_skip(con, resid); | |
3390 | con->v2.in_state = IN_S_FINISH_SKIP; | |
3391 | } | |
3392 | ||
3393 | void ceph_con_v2_revoke_incoming(struct ceph_connection *con) | |
3394 | { | |
3395 | switch (con->v2.in_state) { | |
3396 | case IN_S_PREPARE_READ_DATA: | |
3397 | revoke_at_prepare_read_data(con); | |
3398 | break; | |
3399 | case IN_S_PREPARE_READ_DATA_CONT: | |
3400 | revoke_at_prepare_read_data_cont(con); | |
3401 | break; | |
3402 | case IN_S_HANDLE_EPILOGUE: | |
3403 | revoke_at_handle_epilogue(con); | |
3404 | break; | |
3405 | default: | |
3406 | WARN(1, "bad in_state %d", con->v2.in_state); | |
3407 | break; | |
3408 | } | |
3409 | } | |
3410 | ||
3411 | bool ceph_con_v2_opened(struct ceph_connection *con) | |
3412 | { | |
3413 | return con->v2.peer_global_seq; | |
3414 | } | |
3415 | ||
3416 | void ceph_con_v2_reset_session(struct ceph_connection *con) | |
3417 | { | |
3418 | con->v2.client_cookie = 0; | |
3419 | con->v2.server_cookie = 0; | |
3420 | con->v2.global_seq = 0; | |
3421 | con->v2.connect_seq = 0; | |
3422 | con->v2.peer_global_seq = 0; | |
3423 | } | |
3424 | ||
3425 | void ceph_con_v2_reset_protocol(struct ceph_connection *con) | |
3426 | { | |
3427 | iov_iter_truncate(&con->v2.in_iter, 0); | |
3428 | iov_iter_truncate(&con->v2.out_iter, 0); | |
3429 | con->v2.out_zero = 0; | |
3430 | ||
3431 | clear_in_sign_kvecs(con); | |
3432 | clear_out_sign_kvecs(con); | |
3433 | free_conn_bufs(con); | |
3434 | ||
3435 | if (con->v2.out_enc_pages) { | |
3436 | WARN_ON(!con->v2.out_enc_page_cnt); | |
3437 | ceph_release_page_vector(con->v2.out_enc_pages, | |
3438 | con->v2.out_enc_page_cnt); | |
3439 | con->v2.out_enc_pages = NULL; | |
3440 | con->v2.out_enc_page_cnt = 0; | |
3441 | } | |
3442 | ||
3443 | con->v2.con_mode = CEPH_CON_MODE_UNKNOWN; | |
10f42b3e ID |
3444 | memzero_explicit(&con->v2.in_gcm_nonce, CEPH_GCM_IV_LEN); |
3445 | memzero_explicit(&con->v2.out_gcm_nonce, CEPH_GCM_IV_LEN); | |
cd1a677c ID |
3446 | |
3447 | if (con->v2.hmac_tfm) { | |
3448 | crypto_free_shash(con->v2.hmac_tfm); | |
3449 | con->v2.hmac_tfm = NULL; | |
3450 | } | |
3451 | if (con->v2.gcm_req) { | |
3452 | aead_request_free(con->v2.gcm_req); | |
3453 | con->v2.gcm_req = NULL; | |
3454 | } | |
3455 | if (con->v2.gcm_tfm) { | |
3456 | crypto_free_aead(con->v2.gcm_tfm); | |
3457 | con->v2.gcm_tfm = NULL; | |
3458 | } | |
3459 | } |