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/hash.h> |
12 | #include <crypto/sha2.h> |
13 | #include <crypto/utils.h> |
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_PREPARE_READ_ENC_PAGE 6 |
61 | #define IN_S_PREPARE_SPARSE_DATA 7 |
62 | #define IN_S_PREPARE_SPARSE_DATA_CONT 8 |
63 | #define IN_S_HANDLE_EPILOGUE 9 |
64 | #define IN_S_FINISH_SKIP 10 |
65 | |
66 | #define OUT_S_QUEUE_DATA 1 |
67 | #define OUT_S_QUEUE_DATA_CONT 2 |
68 | #define OUT_S_QUEUE_ENC_PAGE 3 |
69 | #define OUT_S_QUEUE_ZEROS 4 |
70 | #define OUT_S_FINISH_MESSAGE 5 |
71 | #define OUT_S_GET_NEXT 6 |
72 | |
73 | #define CTRL_BODY(p) ((void *)(p) + CEPH_PREAMBLE_LEN) |
74 | #define FRONT_PAD(p) ((void *)(p) + CEPH_EPILOGUE_SECURE_LEN) |
75 | #define MIDDLE_PAD(p) (FRONT_PAD(p) + CEPH_GCM_BLOCK_LEN) |
76 | #define DATA_PAD(p) (MIDDLE_PAD(p) + CEPH_GCM_BLOCK_LEN) |
77 | |
78 | #define CEPH_MSG_FLAGS (MSG_DONTWAIT | MSG_NOSIGNAL) |
79 | |
80 | static int do_recvmsg(struct socket *sock, struct iov_iter *it) |
81 | { |
82 | struct msghdr msg = { .msg_flags = CEPH_MSG_FLAGS }; |
83 | int ret; |
84 | |
85 | msg.msg_iter = *it; |
86 | while (iov_iter_count(i: it)) { |
87 | ret = sock_recvmsg(sock, msg: &msg, flags: msg.msg_flags); |
88 | if (ret <= 0) { |
89 | if (ret == -EAGAIN) |
90 | ret = 0; |
91 | return ret; |
92 | } |
93 | |
94 | iov_iter_advance(i: it, bytes: ret); |
95 | } |
96 | |
97 | WARN_ON(msg_data_left(&msg)); |
98 | return 1; |
99 | } |
100 | |
101 | /* |
102 | * Read as much as possible. |
103 | * |
104 | * Return: |
105 | * 1 - done, nothing (else) to read |
106 | * 0 - socket is empty, need to wait |
107 | * <0 - error |
108 | */ |
109 | static int ceph_tcp_recv(struct ceph_connection *con) |
110 | { |
111 | int ret; |
112 | |
113 | dout("%s con %p %s %zu\n" , __func__, con, |
114 | iov_iter_is_discard(&con->v2.in_iter) ? "discard" : "need" , |
115 | iov_iter_count(&con->v2.in_iter)); |
116 | ret = do_recvmsg(sock: con->sock, it: &con->v2.in_iter); |
117 | dout("%s con %p ret %d left %zu\n" , __func__, con, ret, |
118 | iov_iter_count(&con->v2.in_iter)); |
119 | return ret; |
120 | } |
121 | |
122 | static int do_sendmsg(struct socket *sock, struct iov_iter *it) |
123 | { |
124 | struct msghdr msg = { .msg_flags = CEPH_MSG_FLAGS }; |
125 | int ret; |
126 | |
127 | msg.msg_iter = *it; |
128 | while (iov_iter_count(i: it)) { |
129 | ret = sock_sendmsg(sock, msg: &msg); |
130 | if (ret <= 0) { |
131 | if (ret == -EAGAIN) |
132 | ret = 0; |
133 | return ret; |
134 | } |
135 | |
136 | iov_iter_advance(i: it, bytes: ret); |
137 | } |
138 | |
139 | WARN_ON(msg_data_left(&msg)); |
140 | return 1; |
141 | } |
142 | |
143 | static int do_try_sendpage(struct socket *sock, struct iov_iter *it) |
144 | { |
145 | struct msghdr msg = { .msg_flags = CEPH_MSG_FLAGS }; |
146 | struct bio_vec bv; |
147 | int ret; |
148 | |
149 | if (WARN_ON(!iov_iter_is_bvec(it))) |
150 | return -EINVAL; |
151 | |
152 | while (iov_iter_count(i: it)) { |
153 | /* iov_iter_iovec() for ITER_BVEC */ |
154 | bvec_set_page(bv: &bv, page: it->bvec->bv_page, |
155 | min(iov_iter_count(it), |
156 | it->bvec->bv_len - it->iov_offset), |
157 | offset: it->bvec->bv_offset + it->iov_offset); |
158 | |
159 | /* |
160 | * MSG_SPLICE_PAGES cannot properly handle pages with |
161 | * page_count == 0, we need to fall back to sendmsg if |
162 | * that's the case. |
163 | * |
164 | * Same goes for slab pages: skb_can_coalesce() allows |
165 | * coalescing neighboring slab objects into a single frag |
166 | * which triggers one of hardened usercopy checks. |
167 | */ |
168 | if (sendpage_ok(page: bv.bv_page)) |
169 | msg.msg_flags |= MSG_SPLICE_PAGES; |
170 | else |
171 | msg.msg_flags &= ~MSG_SPLICE_PAGES; |
172 | |
173 | iov_iter_bvec(i: &msg.msg_iter, ITER_SOURCE, bvec: &bv, nr_segs: 1, count: bv.bv_len); |
174 | ret = sock_sendmsg(sock, msg: &msg); |
175 | if (ret <= 0) { |
176 | if (ret == -EAGAIN) |
177 | ret = 0; |
178 | return ret; |
179 | } |
180 | |
181 | iov_iter_advance(i: it, bytes: ret); |
182 | } |
183 | |
184 | return 1; |
185 | } |
186 | |
187 | /* |
188 | * Write as much as possible. The socket is expected to be corked, |
189 | * so we don't bother with MSG_MORE here. |
190 | * |
191 | * Return: |
192 | * 1 - done, nothing (else) to write |
193 | * 0 - socket is full, need to wait |
194 | * <0 - error |
195 | */ |
196 | static int ceph_tcp_send(struct ceph_connection *con) |
197 | { |
198 | int ret; |
199 | |
200 | dout("%s con %p have %zu try_sendpage %d\n" , __func__, con, |
201 | iov_iter_count(&con->v2.out_iter), con->v2.out_iter_sendpage); |
202 | if (con->v2.out_iter_sendpage) |
203 | ret = do_try_sendpage(sock: con->sock, it: &con->v2.out_iter); |
204 | else |
205 | ret = do_sendmsg(sock: con->sock, it: &con->v2.out_iter); |
206 | dout("%s con %p ret %d left %zu\n" , __func__, con, ret, |
207 | iov_iter_count(&con->v2.out_iter)); |
208 | return ret; |
209 | } |
210 | |
211 | static void add_in_kvec(struct ceph_connection *con, void *buf, int len) |
212 | { |
213 | BUG_ON(con->v2.in_kvec_cnt >= ARRAY_SIZE(con->v2.in_kvecs)); |
214 | WARN_ON(!iov_iter_is_kvec(&con->v2.in_iter)); |
215 | |
216 | con->v2.in_kvecs[con->v2.in_kvec_cnt].iov_base = buf; |
217 | con->v2.in_kvecs[con->v2.in_kvec_cnt].iov_len = len; |
218 | con->v2.in_kvec_cnt++; |
219 | |
220 | con->v2.in_iter.nr_segs++; |
221 | con->v2.in_iter.count += len; |
222 | } |
223 | |
224 | static void reset_in_kvecs(struct ceph_connection *con) |
225 | { |
226 | WARN_ON(iov_iter_count(&con->v2.in_iter)); |
227 | |
228 | con->v2.in_kvec_cnt = 0; |
229 | iov_iter_kvec(i: &con->v2.in_iter, ITER_DEST, kvec: con->v2.in_kvecs, nr_segs: 0, count: 0); |
230 | } |
231 | |
232 | static void set_in_bvec(struct ceph_connection *con, const struct bio_vec *bv) |
233 | { |
234 | WARN_ON(iov_iter_count(&con->v2.in_iter)); |
235 | |
236 | con->v2.in_bvec = *bv; |
237 | iov_iter_bvec(i: &con->v2.in_iter, ITER_DEST, bvec: &con->v2.in_bvec, nr_segs: 1, count: bv->bv_len); |
238 | } |
239 | |
240 | static void set_in_skip(struct ceph_connection *con, int len) |
241 | { |
242 | WARN_ON(iov_iter_count(&con->v2.in_iter)); |
243 | |
244 | dout("%s con %p len %d\n" , __func__, con, len); |
245 | iov_iter_discard(i: &con->v2.in_iter, ITER_DEST, count: len); |
246 | } |
247 | |
248 | static void add_out_kvec(struct ceph_connection *con, void *buf, int len) |
249 | { |
250 | BUG_ON(con->v2.out_kvec_cnt >= ARRAY_SIZE(con->v2.out_kvecs)); |
251 | WARN_ON(!iov_iter_is_kvec(&con->v2.out_iter)); |
252 | WARN_ON(con->v2.out_zero); |
253 | |
254 | con->v2.out_kvecs[con->v2.out_kvec_cnt].iov_base = buf; |
255 | con->v2.out_kvecs[con->v2.out_kvec_cnt].iov_len = len; |
256 | con->v2.out_kvec_cnt++; |
257 | |
258 | con->v2.out_iter.nr_segs++; |
259 | con->v2.out_iter.count += len; |
260 | } |
261 | |
262 | static void reset_out_kvecs(struct ceph_connection *con) |
263 | { |
264 | WARN_ON(iov_iter_count(&con->v2.out_iter)); |
265 | WARN_ON(con->v2.out_zero); |
266 | |
267 | con->v2.out_kvec_cnt = 0; |
268 | |
269 | iov_iter_kvec(i: &con->v2.out_iter, ITER_SOURCE, kvec: con->v2.out_kvecs, nr_segs: 0, count: 0); |
270 | con->v2.out_iter_sendpage = false; |
271 | } |
272 | |
273 | static void set_out_bvec(struct ceph_connection *con, const struct bio_vec *bv, |
274 | bool zerocopy) |
275 | { |
276 | WARN_ON(iov_iter_count(&con->v2.out_iter)); |
277 | WARN_ON(con->v2.out_zero); |
278 | |
279 | con->v2.out_bvec = *bv; |
280 | con->v2.out_iter_sendpage = zerocopy; |
281 | iov_iter_bvec(i: &con->v2.out_iter, ITER_SOURCE, bvec: &con->v2.out_bvec, nr_segs: 1, |
282 | count: con->v2.out_bvec.bv_len); |
283 | } |
284 | |
285 | static void set_out_bvec_zero(struct ceph_connection *con) |
286 | { |
287 | WARN_ON(iov_iter_count(&con->v2.out_iter)); |
288 | WARN_ON(!con->v2.out_zero); |
289 | |
290 | bvec_set_page(bv: &con->v2.out_bvec, page: ceph_zero_page, |
291 | min(con->v2.out_zero, (int)PAGE_SIZE), offset: 0); |
292 | con->v2.out_iter_sendpage = true; |
293 | iov_iter_bvec(i: &con->v2.out_iter, ITER_SOURCE, bvec: &con->v2.out_bvec, nr_segs: 1, |
294 | count: con->v2.out_bvec.bv_len); |
295 | } |
296 | |
297 | static void out_zero_add(struct ceph_connection *con, int len) |
298 | { |
299 | dout("%s con %p len %d\n" , __func__, con, len); |
300 | con->v2.out_zero += len; |
301 | } |
302 | |
303 | static void *alloc_conn_buf(struct ceph_connection *con, int len) |
304 | { |
305 | void *buf; |
306 | |
307 | dout("%s con %p len %d\n" , __func__, con, len); |
308 | |
309 | if (WARN_ON(con->v2.conn_buf_cnt >= ARRAY_SIZE(con->v2.conn_bufs))) |
310 | return NULL; |
311 | |
312 | buf = kvmalloc(size: len, GFP_NOIO); |
313 | if (!buf) |
314 | return NULL; |
315 | |
316 | con->v2.conn_bufs[con->v2.conn_buf_cnt++] = buf; |
317 | return buf; |
318 | } |
319 | |
320 | static void free_conn_bufs(struct ceph_connection *con) |
321 | { |
322 | while (con->v2.conn_buf_cnt) |
323 | kvfree(addr: con->v2.conn_bufs[--con->v2.conn_buf_cnt]); |
324 | } |
325 | |
326 | static void add_in_sign_kvec(struct ceph_connection *con, void *buf, int len) |
327 | { |
328 | BUG_ON(con->v2.in_sign_kvec_cnt >= ARRAY_SIZE(con->v2.in_sign_kvecs)); |
329 | |
330 | con->v2.in_sign_kvecs[con->v2.in_sign_kvec_cnt].iov_base = buf; |
331 | con->v2.in_sign_kvecs[con->v2.in_sign_kvec_cnt].iov_len = len; |
332 | con->v2.in_sign_kvec_cnt++; |
333 | } |
334 | |
335 | static void clear_in_sign_kvecs(struct ceph_connection *con) |
336 | { |
337 | con->v2.in_sign_kvec_cnt = 0; |
338 | } |
339 | |
340 | static void add_out_sign_kvec(struct ceph_connection *con, void *buf, int len) |
341 | { |
342 | BUG_ON(con->v2.out_sign_kvec_cnt >= ARRAY_SIZE(con->v2.out_sign_kvecs)); |
343 | |
344 | con->v2.out_sign_kvecs[con->v2.out_sign_kvec_cnt].iov_base = buf; |
345 | con->v2.out_sign_kvecs[con->v2.out_sign_kvec_cnt].iov_len = len; |
346 | con->v2.out_sign_kvec_cnt++; |
347 | } |
348 | |
349 | static void clear_out_sign_kvecs(struct ceph_connection *con) |
350 | { |
351 | con->v2.out_sign_kvec_cnt = 0; |
352 | } |
353 | |
354 | static bool con_secure(struct ceph_connection *con) |
355 | { |
356 | return con->v2.con_mode == CEPH_CON_MODE_SECURE; |
357 | } |
358 | |
359 | static int front_len(const struct ceph_msg *msg) |
360 | { |
361 | return le32_to_cpu(msg->hdr.front_len); |
362 | } |
363 | |
364 | static int middle_len(const struct ceph_msg *msg) |
365 | { |
366 | return le32_to_cpu(msg->hdr.middle_len); |
367 | } |
368 | |
369 | static int data_len(const struct ceph_msg *msg) |
370 | { |
371 | return le32_to_cpu(msg->hdr.data_len); |
372 | } |
373 | |
374 | static bool need_padding(int len) |
375 | { |
376 | return !IS_ALIGNED(len, CEPH_GCM_BLOCK_LEN); |
377 | } |
378 | |
379 | static int padded_len(int len) |
380 | { |
381 | return ALIGN(len, CEPH_GCM_BLOCK_LEN); |
382 | } |
383 | |
384 | static int padding_len(int len) |
385 | { |
386 | return padded_len(len) - len; |
387 | } |
388 | |
389 | /* preamble + control segment */ |
390 | static int head_onwire_len(int ctrl_len, bool secure) |
391 | { |
392 | int head_len; |
393 | int rem_len; |
394 | |
395 | BUG_ON(ctrl_len < 0 || ctrl_len > CEPH_MSG_MAX_CONTROL_LEN); |
396 | |
397 | if (secure) { |
398 | head_len = CEPH_PREAMBLE_SECURE_LEN; |
399 | if (ctrl_len > CEPH_PREAMBLE_INLINE_LEN) { |
400 | rem_len = ctrl_len - CEPH_PREAMBLE_INLINE_LEN; |
401 | head_len += padded_len(len: rem_len) + CEPH_GCM_TAG_LEN; |
402 | } |
403 | } else { |
404 | head_len = CEPH_PREAMBLE_PLAIN_LEN; |
405 | if (ctrl_len) |
406 | head_len += ctrl_len + CEPH_CRC_LEN; |
407 | } |
408 | return head_len; |
409 | } |
410 | |
411 | /* front, middle and data segments + epilogue */ |
412 | static int __tail_onwire_len(int front_len, int middle_len, int data_len, |
413 | bool secure) |
414 | { |
415 | BUG_ON(front_len < 0 || front_len > CEPH_MSG_MAX_FRONT_LEN || |
416 | middle_len < 0 || middle_len > CEPH_MSG_MAX_MIDDLE_LEN || |
417 | data_len < 0 || data_len > CEPH_MSG_MAX_DATA_LEN); |
418 | |
419 | if (!front_len && !middle_len && !data_len) |
420 | return 0; |
421 | |
422 | if (!secure) |
423 | return front_len + middle_len + data_len + |
424 | CEPH_EPILOGUE_PLAIN_LEN; |
425 | |
426 | return padded_len(len: front_len) + padded_len(len: middle_len) + |
427 | padded_len(len: data_len) + CEPH_EPILOGUE_SECURE_LEN; |
428 | } |
429 | |
430 | static int tail_onwire_len(const struct ceph_msg *msg, bool secure) |
431 | { |
432 | return __tail_onwire_len(front_len: front_len(msg), middle_len: middle_len(msg), |
433 | data_len: data_len(msg), secure); |
434 | } |
435 | |
436 | /* head_onwire_len(sizeof(struct ceph_msg_header2), false) */ |
437 | #define MESSAGE_HEAD_PLAIN_LEN (CEPH_PREAMBLE_PLAIN_LEN + \ |
438 | sizeof(struct ceph_msg_header2) + \ |
439 | CEPH_CRC_LEN) |
440 | |
441 | static const int frame_aligns[] = { |
442 | sizeof(void *), |
443 | sizeof(void *), |
444 | sizeof(void *), |
445 | PAGE_SIZE |
446 | }; |
447 | |
448 | /* |
449 | * Discards trailing empty segments, unless there is just one segment. |
450 | * A frame always has at least one (possibly empty) segment. |
451 | */ |
452 | static int calc_segment_count(const int *lens, int len_cnt) |
453 | { |
454 | int i; |
455 | |
456 | for (i = len_cnt - 1; i >= 0; i--) { |
457 | if (lens[i]) |
458 | return i + 1; |
459 | } |
460 | |
461 | return 1; |
462 | } |
463 | |
464 | static void init_frame_desc(struct ceph_frame_desc *desc, int tag, |
465 | const int *lens, int len_cnt) |
466 | { |
467 | int i; |
468 | |
469 | memset(desc, 0, sizeof(*desc)); |
470 | |
471 | desc->fd_tag = tag; |
472 | desc->fd_seg_cnt = calc_segment_count(lens, len_cnt); |
473 | BUG_ON(desc->fd_seg_cnt > CEPH_FRAME_MAX_SEGMENT_COUNT); |
474 | for (i = 0; i < desc->fd_seg_cnt; i++) { |
475 | desc->fd_lens[i] = lens[i]; |
476 | desc->fd_aligns[i] = frame_aligns[i]; |
477 | } |
478 | } |
479 | |
480 | /* |
481 | * Preamble crc covers everything up to itself (28 bytes) and |
482 | * is calculated and verified irrespective of the connection mode |
483 | * (i.e. even if the frame is encrypted). |
484 | */ |
485 | static void encode_preamble(const struct ceph_frame_desc *desc, void *p) |
486 | { |
487 | void *crcp = p + CEPH_PREAMBLE_LEN - CEPH_CRC_LEN; |
488 | void *start = p; |
489 | int i; |
490 | |
491 | memset(p, 0, CEPH_PREAMBLE_LEN); |
492 | |
493 | ceph_encode_8(p: &p, v: desc->fd_tag); |
494 | ceph_encode_8(p: &p, v: desc->fd_seg_cnt); |
495 | for (i = 0; i < desc->fd_seg_cnt; i++) { |
496 | ceph_encode_32(p: &p, v: desc->fd_lens[i]); |
497 | ceph_encode_16(p: &p, v: desc->fd_aligns[i]); |
498 | } |
499 | |
500 | put_unaligned_le32(val: crc32c(crc: 0, address: start, length: crcp - start), p: crcp); |
501 | } |
502 | |
503 | static int decode_preamble(void *p, struct ceph_frame_desc *desc) |
504 | { |
505 | void *crcp = p + CEPH_PREAMBLE_LEN - CEPH_CRC_LEN; |
506 | u32 crc, expected_crc; |
507 | int i; |
508 | |
509 | crc = crc32c(crc: 0, address: p, length: crcp - p); |
510 | expected_crc = get_unaligned_le32(p: crcp); |
511 | if (crc != expected_crc) { |
512 | pr_err("bad preamble crc, calculated %u, expected %u\n" , |
513 | crc, expected_crc); |
514 | return -EBADMSG; |
515 | } |
516 | |
517 | memset(desc, 0, sizeof(*desc)); |
518 | |
519 | desc->fd_tag = ceph_decode_8(p: &p); |
520 | desc->fd_seg_cnt = ceph_decode_8(p: &p); |
521 | if (desc->fd_seg_cnt < 1 || |
522 | desc->fd_seg_cnt > CEPH_FRAME_MAX_SEGMENT_COUNT) { |
523 | pr_err("bad segment count %d\n" , desc->fd_seg_cnt); |
524 | return -EINVAL; |
525 | } |
526 | for (i = 0; i < desc->fd_seg_cnt; i++) { |
527 | desc->fd_lens[i] = ceph_decode_32(p: &p); |
528 | desc->fd_aligns[i] = ceph_decode_16(p: &p); |
529 | } |
530 | |
531 | if (desc->fd_lens[0] < 0 || |
532 | desc->fd_lens[0] > CEPH_MSG_MAX_CONTROL_LEN) { |
533 | pr_err("bad control segment length %d\n" , desc->fd_lens[0]); |
534 | return -EINVAL; |
535 | } |
536 | if (desc->fd_lens[1] < 0 || |
537 | desc->fd_lens[1] > CEPH_MSG_MAX_FRONT_LEN) { |
538 | pr_err("bad front segment length %d\n" , desc->fd_lens[1]); |
539 | return -EINVAL; |
540 | } |
541 | if (desc->fd_lens[2] < 0 || |
542 | desc->fd_lens[2] > CEPH_MSG_MAX_MIDDLE_LEN) { |
543 | pr_err("bad middle segment length %d\n" , desc->fd_lens[2]); |
544 | return -EINVAL; |
545 | } |
546 | if (desc->fd_lens[3] < 0 || |
547 | desc->fd_lens[3] > CEPH_MSG_MAX_DATA_LEN) { |
548 | pr_err("bad data segment length %d\n" , desc->fd_lens[3]); |
549 | return -EINVAL; |
550 | } |
551 | |
552 | /* |
553 | * This would fire for FRAME_TAG_WAIT (it has one empty |
554 | * segment), but we should never get it as client. |
555 | */ |
556 | if (!desc->fd_lens[desc->fd_seg_cnt - 1]) { |
557 | pr_err("last segment empty, segment count %d\n" , |
558 | desc->fd_seg_cnt); |
559 | return -EINVAL; |
560 | } |
561 | |
562 | return 0; |
563 | } |
564 | |
565 | static void encode_epilogue_plain(struct ceph_connection *con, bool aborted) |
566 | { |
567 | con->v2.out_epil.late_status = aborted ? FRAME_LATE_STATUS_ABORTED : |
568 | FRAME_LATE_STATUS_COMPLETE; |
569 | cpu_to_le32s(&con->v2.out_epil.front_crc); |
570 | cpu_to_le32s(&con->v2.out_epil.middle_crc); |
571 | cpu_to_le32s(&con->v2.out_epil.data_crc); |
572 | } |
573 | |
574 | static void encode_epilogue_secure(struct ceph_connection *con, bool aborted) |
575 | { |
576 | memset(&con->v2.out_epil, 0, sizeof(con->v2.out_epil)); |
577 | con->v2.out_epil.late_status = aborted ? FRAME_LATE_STATUS_ABORTED : |
578 | FRAME_LATE_STATUS_COMPLETE; |
579 | } |
580 | |
581 | static int decode_epilogue(void *p, u32 *front_crc, u32 *middle_crc, |
582 | u32 *data_crc) |
583 | { |
584 | u8 late_status; |
585 | |
586 | late_status = ceph_decode_8(p: &p); |
587 | if ((late_status & FRAME_LATE_STATUS_ABORTED_MASK) != |
588 | FRAME_LATE_STATUS_COMPLETE) { |
589 | /* we should never get an aborted message as client */ |
590 | pr_err("bad late_status 0x%x\n" , late_status); |
591 | return -EINVAL; |
592 | } |
593 | |
594 | if (front_crc && middle_crc && data_crc) { |
595 | *front_crc = ceph_decode_32(p: &p); |
596 | *middle_crc = ceph_decode_32(p: &p); |
597 | *data_crc = ceph_decode_32(p: &p); |
598 | } |
599 | |
600 | return 0; |
601 | } |
602 | |
603 | static void (struct ceph_msg_header *hdr, |
604 | const struct ceph_msg_header2 *hdr2, |
605 | int front_len, int middle_len, int data_len, |
606 | const struct ceph_entity_name *peer_name) |
607 | { |
608 | hdr->seq = hdr2->seq; |
609 | hdr->tid = hdr2->tid; |
610 | hdr->type = hdr2->type; |
611 | hdr->priority = hdr2->priority; |
612 | hdr->version = hdr2->version; |
613 | hdr->front_len = cpu_to_le32(front_len); |
614 | hdr->middle_len = cpu_to_le32(middle_len); |
615 | hdr->data_len = cpu_to_le32(data_len); |
616 | hdr->data_off = hdr2->data_off; |
617 | hdr->src = *peer_name; |
618 | hdr->compat_version = hdr2->compat_version; |
619 | hdr->reserved = 0; |
620 | hdr->crc = 0; |
621 | } |
622 | |
623 | static void (struct ceph_msg_header2 *hdr2, |
624 | const struct ceph_msg_header *hdr, u64 ack_seq) |
625 | { |
626 | hdr2->seq = hdr->seq; |
627 | hdr2->tid = hdr->tid; |
628 | hdr2->type = hdr->type; |
629 | hdr2->priority = hdr->priority; |
630 | hdr2->version = hdr->version; |
631 | hdr2->data_pre_padding_len = 0; |
632 | hdr2->data_off = hdr->data_off; |
633 | hdr2->ack_seq = cpu_to_le64(ack_seq); |
634 | hdr2->flags = 0; |
635 | hdr2->compat_version = hdr->compat_version; |
636 | hdr2->reserved = 0; |
637 | } |
638 | |
639 | static int verify_control_crc(struct ceph_connection *con) |
640 | { |
641 | int ctrl_len = con->v2.in_desc.fd_lens[0]; |
642 | u32 crc, expected_crc; |
643 | |
644 | WARN_ON(con->v2.in_kvecs[0].iov_len != ctrl_len); |
645 | WARN_ON(con->v2.in_kvecs[1].iov_len != CEPH_CRC_LEN); |
646 | |
647 | crc = crc32c(crc: -1, address: con->v2.in_kvecs[0].iov_base, length: ctrl_len); |
648 | expected_crc = get_unaligned_le32(p: con->v2.in_kvecs[1].iov_base); |
649 | if (crc != expected_crc) { |
650 | pr_err("bad control crc, calculated %u, expected %u\n" , |
651 | crc, expected_crc); |
652 | return -EBADMSG; |
653 | } |
654 | |
655 | return 0; |
656 | } |
657 | |
658 | static int verify_epilogue_crcs(struct ceph_connection *con, u32 front_crc, |
659 | u32 middle_crc, u32 data_crc) |
660 | { |
661 | if (front_len(msg: con->in_msg)) { |
662 | con->in_front_crc = crc32c(crc: -1, address: con->in_msg->front.iov_base, |
663 | length: front_len(msg: con->in_msg)); |
664 | } else { |
665 | WARN_ON(!middle_len(con->in_msg) && !data_len(con->in_msg)); |
666 | con->in_front_crc = -1; |
667 | } |
668 | |
669 | if (middle_len(msg: con->in_msg)) |
670 | con->in_middle_crc = crc32c(crc: -1, |
671 | address: con->in_msg->middle->vec.iov_base, |
672 | length: middle_len(msg: con->in_msg)); |
673 | else if (data_len(msg: con->in_msg)) |
674 | con->in_middle_crc = -1; |
675 | else |
676 | con->in_middle_crc = 0; |
677 | |
678 | if (!data_len(msg: con->in_msg)) |
679 | con->in_data_crc = 0; |
680 | |
681 | dout("%s con %p msg %p crcs %u %u %u\n" , __func__, con, con->in_msg, |
682 | con->in_front_crc, con->in_middle_crc, con->in_data_crc); |
683 | |
684 | if (con->in_front_crc != front_crc) { |
685 | pr_err("bad front crc, calculated %u, expected %u\n" , |
686 | con->in_front_crc, front_crc); |
687 | return -EBADMSG; |
688 | } |
689 | if (con->in_middle_crc != middle_crc) { |
690 | pr_err("bad middle crc, calculated %u, expected %u\n" , |
691 | con->in_middle_crc, middle_crc); |
692 | return -EBADMSG; |
693 | } |
694 | if (con->in_data_crc != data_crc) { |
695 | pr_err("bad data crc, calculated %u, expected %u\n" , |
696 | con->in_data_crc, data_crc); |
697 | return -EBADMSG; |
698 | } |
699 | |
700 | return 0; |
701 | } |
702 | |
703 | static int setup_crypto(struct ceph_connection *con, |
704 | const u8 *session_key, int session_key_len, |
705 | const u8 *con_secret, int con_secret_len) |
706 | { |
707 | unsigned int noio_flag; |
708 | int ret; |
709 | |
710 | dout("%s con %p con_mode %d session_key_len %d con_secret_len %d\n" , |
711 | __func__, con, con->v2.con_mode, session_key_len, con_secret_len); |
712 | WARN_ON(con->v2.hmac_tfm || con->v2.gcm_tfm || con->v2.gcm_req); |
713 | |
714 | if (con->v2.con_mode != CEPH_CON_MODE_CRC && |
715 | con->v2.con_mode != CEPH_CON_MODE_SECURE) { |
716 | pr_err("bad con_mode %d\n" , con->v2.con_mode); |
717 | return -EINVAL; |
718 | } |
719 | |
720 | if (!session_key_len) { |
721 | WARN_ON(con->v2.con_mode != CEPH_CON_MODE_CRC); |
722 | WARN_ON(con_secret_len); |
723 | return 0; /* auth_none */ |
724 | } |
725 | |
726 | noio_flag = memalloc_noio_save(); |
727 | con->v2.hmac_tfm = crypto_alloc_shash(alg_name: "hmac(sha256)" , type: 0, mask: 0); |
728 | memalloc_noio_restore(flags: noio_flag); |
729 | if (IS_ERR(ptr: con->v2.hmac_tfm)) { |
730 | ret = PTR_ERR(ptr: con->v2.hmac_tfm); |
731 | con->v2.hmac_tfm = NULL; |
732 | pr_err("failed to allocate hmac tfm context: %d\n" , ret); |
733 | return ret; |
734 | } |
735 | |
736 | ret = crypto_shash_setkey(tfm: con->v2.hmac_tfm, key: session_key, |
737 | keylen: session_key_len); |
738 | if (ret) { |
739 | pr_err("failed to set hmac key: %d\n" , ret); |
740 | return ret; |
741 | } |
742 | |
743 | if (con->v2.con_mode == CEPH_CON_MODE_CRC) { |
744 | WARN_ON(con_secret_len); |
745 | return 0; /* auth_x, plain mode */ |
746 | } |
747 | |
748 | if (con_secret_len < CEPH_GCM_KEY_LEN + 2 * CEPH_GCM_IV_LEN) { |
749 | pr_err("con_secret too small %d\n" , con_secret_len); |
750 | return -EINVAL; |
751 | } |
752 | |
753 | noio_flag = memalloc_noio_save(); |
754 | con->v2.gcm_tfm = crypto_alloc_aead(alg_name: "gcm(aes)" , type: 0, mask: 0); |
755 | memalloc_noio_restore(flags: noio_flag); |
756 | if (IS_ERR(ptr: con->v2.gcm_tfm)) { |
757 | ret = PTR_ERR(ptr: con->v2.gcm_tfm); |
758 | con->v2.gcm_tfm = NULL; |
759 | pr_err("failed to allocate gcm tfm context: %d\n" , ret); |
760 | return ret; |
761 | } |
762 | |
763 | WARN_ON((unsigned long)con_secret & |
764 | crypto_aead_alignmask(con->v2.gcm_tfm)); |
765 | ret = crypto_aead_setkey(tfm: con->v2.gcm_tfm, key: con_secret, CEPH_GCM_KEY_LEN); |
766 | if (ret) { |
767 | pr_err("failed to set gcm key: %d\n" , ret); |
768 | return ret; |
769 | } |
770 | |
771 | WARN_ON(crypto_aead_ivsize(con->v2.gcm_tfm) != CEPH_GCM_IV_LEN); |
772 | ret = crypto_aead_setauthsize(tfm: con->v2.gcm_tfm, CEPH_GCM_TAG_LEN); |
773 | if (ret) { |
774 | pr_err("failed to set gcm tag size: %d\n" , ret); |
775 | return ret; |
776 | } |
777 | |
778 | con->v2.gcm_req = aead_request_alloc(tfm: con->v2.gcm_tfm, GFP_NOIO); |
779 | if (!con->v2.gcm_req) { |
780 | pr_err("failed to allocate gcm request\n" ); |
781 | return -ENOMEM; |
782 | } |
783 | |
784 | crypto_init_wait(wait: &con->v2.gcm_wait); |
785 | aead_request_set_callback(req: con->v2.gcm_req, CRYPTO_TFM_REQ_MAY_BACKLOG, |
786 | compl: crypto_req_done, data: &con->v2.gcm_wait); |
787 | |
788 | memcpy(&con->v2.in_gcm_nonce, con_secret + CEPH_GCM_KEY_LEN, |
789 | CEPH_GCM_IV_LEN); |
790 | memcpy(&con->v2.out_gcm_nonce, |
791 | con_secret + CEPH_GCM_KEY_LEN + CEPH_GCM_IV_LEN, |
792 | CEPH_GCM_IV_LEN); |
793 | return 0; /* auth_x, secure mode */ |
794 | } |
795 | |
796 | static int hmac_sha256(struct ceph_connection *con, const struct kvec *kvecs, |
797 | int kvec_cnt, u8 *hmac) |
798 | { |
799 | SHASH_DESC_ON_STACK(desc, con->v2.hmac_tfm); /* tfm arg is ignored */ |
800 | int ret; |
801 | int i; |
802 | |
803 | dout("%s con %p hmac_tfm %p kvec_cnt %d\n" , __func__, con, |
804 | con->v2.hmac_tfm, kvec_cnt); |
805 | |
806 | if (!con->v2.hmac_tfm) { |
807 | memset(hmac, 0, SHA256_DIGEST_SIZE); |
808 | return 0; /* auth_none */ |
809 | } |
810 | |
811 | desc->tfm = con->v2.hmac_tfm; |
812 | ret = crypto_shash_init(desc); |
813 | if (ret) |
814 | goto out; |
815 | |
816 | for (i = 0; i < kvec_cnt; i++) { |
817 | ret = crypto_shash_update(desc, data: kvecs[i].iov_base, |
818 | len: kvecs[i].iov_len); |
819 | if (ret) |
820 | goto out; |
821 | } |
822 | |
823 | ret = crypto_shash_final(desc, out: hmac); |
824 | |
825 | out: |
826 | shash_desc_zero(desc); |
827 | return ret; /* auth_x, both plain and secure modes */ |
828 | } |
829 | |
830 | static void gcm_inc_nonce(struct ceph_gcm_nonce *nonce) |
831 | { |
832 | u64 counter; |
833 | |
834 | counter = le64_to_cpu(nonce->counter); |
835 | nonce->counter = cpu_to_le64(counter + 1); |
836 | } |
837 | |
838 | static int gcm_crypt(struct ceph_connection *con, bool encrypt, |
839 | struct scatterlist *src, struct scatterlist *dst, |
840 | int src_len) |
841 | { |
842 | struct ceph_gcm_nonce *nonce; |
843 | int ret; |
844 | |
845 | nonce = encrypt ? &con->v2.out_gcm_nonce : &con->v2.in_gcm_nonce; |
846 | |
847 | aead_request_set_ad(req: con->v2.gcm_req, assoclen: 0); /* no AAD */ |
848 | aead_request_set_crypt(req: con->v2.gcm_req, src, dst, cryptlen: src_len, iv: (u8 *)nonce); |
849 | ret = crypto_wait_req(err: encrypt ? crypto_aead_encrypt(req: con->v2.gcm_req) : |
850 | crypto_aead_decrypt(req: con->v2.gcm_req), |
851 | wait: &con->v2.gcm_wait); |
852 | if (ret) |
853 | return ret; |
854 | |
855 | gcm_inc_nonce(nonce); |
856 | return 0; |
857 | } |
858 | |
859 | static void get_bvec_at(struct ceph_msg_data_cursor *cursor, |
860 | struct bio_vec *bv) |
861 | { |
862 | struct page *page; |
863 | size_t off, len; |
864 | |
865 | WARN_ON(!cursor->total_resid); |
866 | |
867 | /* skip zero-length data items */ |
868 | while (!cursor->resid) |
869 | ceph_msg_data_advance(cursor, bytes: 0); |
870 | |
871 | /* get a piece of data, cursor isn't advanced */ |
872 | page = ceph_msg_data_next(cursor, page_offset: &off, length: &len); |
873 | bvec_set_page(bv, page, len, offset: off); |
874 | } |
875 | |
876 | static int calc_sg_cnt(void *buf, int buf_len) |
877 | { |
878 | int sg_cnt; |
879 | |
880 | if (!buf_len) |
881 | return 0; |
882 | |
883 | sg_cnt = need_padding(len: buf_len) ? 1 : 0; |
884 | if (is_vmalloc_addr(x: buf)) { |
885 | WARN_ON(offset_in_page(buf)); |
886 | sg_cnt += PAGE_ALIGN(buf_len) >> PAGE_SHIFT; |
887 | } else { |
888 | sg_cnt++; |
889 | } |
890 | |
891 | return sg_cnt; |
892 | } |
893 | |
894 | static int calc_sg_cnt_cursor(struct ceph_msg_data_cursor *cursor) |
895 | { |
896 | int data_len = cursor->total_resid; |
897 | struct bio_vec bv; |
898 | int sg_cnt; |
899 | |
900 | if (!data_len) |
901 | return 0; |
902 | |
903 | sg_cnt = need_padding(len: data_len) ? 1 : 0; |
904 | do { |
905 | get_bvec_at(cursor, bv: &bv); |
906 | sg_cnt++; |
907 | |
908 | ceph_msg_data_advance(cursor, bytes: bv.bv_len); |
909 | } while (cursor->total_resid); |
910 | |
911 | return sg_cnt; |
912 | } |
913 | |
914 | static void init_sgs(struct scatterlist **sg, void *buf, int buf_len, u8 *pad) |
915 | { |
916 | void *end = buf + buf_len; |
917 | struct page *page; |
918 | int len; |
919 | void *p; |
920 | |
921 | if (!buf_len) |
922 | return; |
923 | |
924 | if (is_vmalloc_addr(x: buf)) { |
925 | p = buf; |
926 | do { |
927 | page = vmalloc_to_page(addr: p); |
928 | len = min_t(int, end - p, PAGE_SIZE); |
929 | WARN_ON(!page || !len || offset_in_page(p)); |
930 | sg_set_page(sg: *sg, page, len, offset: 0); |
931 | *sg = sg_next(*sg); |
932 | p += len; |
933 | } while (p != end); |
934 | } else { |
935 | sg_set_buf(sg: *sg, buf, buflen: buf_len); |
936 | *sg = sg_next(*sg); |
937 | } |
938 | |
939 | if (need_padding(len: buf_len)) { |
940 | sg_set_buf(sg: *sg, buf: pad, buflen: padding_len(len: buf_len)); |
941 | *sg = sg_next(*sg); |
942 | } |
943 | } |
944 | |
945 | static void init_sgs_cursor(struct scatterlist **sg, |
946 | struct ceph_msg_data_cursor *cursor, u8 *pad) |
947 | { |
948 | int data_len = cursor->total_resid; |
949 | struct bio_vec bv; |
950 | |
951 | if (!data_len) |
952 | return; |
953 | |
954 | do { |
955 | get_bvec_at(cursor, bv: &bv); |
956 | sg_set_page(sg: *sg, page: bv.bv_page, len: bv.bv_len, offset: bv.bv_offset); |
957 | *sg = sg_next(*sg); |
958 | |
959 | ceph_msg_data_advance(cursor, bytes: bv.bv_len); |
960 | } while (cursor->total_resid); |
961 | |
962 | if (need_padding(len: data_len)) { |
963 | sg_set_buf(sg: *sg, buf: pad, buflen: padding_len(len: data_len)); |
964 | *sg = sg_next(*sg); |
965 | } |
966 | } |
967 | |
968 | /** |
969 | * init_sgs_pages: set up scatterlist on an array of page pointers |
970 | * @sg: scatterlist to populate |
971 | * @pages: pointer to page array |
972 | * @dpos: position in the array to start (bytes) |
973 | * @dlen: len to add to sg (bytes) |
974 | * @pad: pointer to pad destination (if any) |
975 | * |
976 | * Populate the scatterlist from the page array, starting at an arbitrary |
977 | * byte in the array and running for a specified length. |
978 | */ |
979 | static void init_sgs_pages(struct scatterlist **sg, struct page **pages, |
980 | int dpos, int dlen, u8 *pad) |
981 | { |
982 | int idx = dpos >> PAGE_SHIFT; |
983 | int off = offset_in_page(dpos); |
984 | int resid = dlen; |
985 | |
986 | do { |
987 | int len = min(resid, (int)PAGE_SIZE - off); |
988 | |
989 | sg_set_page(sg: *sg, page: pages[idx], len, offset: off); |
990 | *sg = sg_next(*sg); |
991 | off = 0; |
992 | ++idx; |
993 | resid -= len; |
994 | } while (resid); |
995 | |
996 | if (need_padding(len: dlen)) { |
997 | sg_set_buf(sg: *sg, buf: pad, buflen: padding_len(len: dlen)); |
998 | *sg = sg_next(*sg); |
999 | } |
1000 | } |
1001 | |
1002 | static int setup_message_sgs(struct sg_table *sgt, struct ceph_msg *msg, |
1003 | u8 *front_pad, u8 *middle_pad, u8 *data_pad, |
1004 | void *epilogue, struct page **pages, int dpos, |
1005 | bool add_tag) |
1006 | { |
1007 | struct ceph_msg_data_cursor cursor; |
1008 | struct scatterlist *cur_sg; |
1009 | int dlen = data_len(msg); |
1010 | int sg_cnt; |
1011 | int ret; |
1012 | |
1013 | if (!front_len(msg) && !middle_len(msg) && !data_len(msg)) |
1014 | return 0; |
1015 | |
1016 | sg_cnt = 1; /* epilogue + [auth tag] */ |
1017 | if (front_len(msg)) |
1018 | sg_cnt += calc_sg_cnt(buf: msg->front.iov_base, |
1019 | buf_len: front_len(msg)); |
1020 | if (middle_len(msg)) |
1021 | sg_cnt += calc_sg_cnt(buf: msg->middle->vec.iov_base, |
1022 | buf_len: middle_len(msg)); |
1023 | if (dlen) { |
1024 | if (pages) { |
1025 | sg_cnt += calc_pages_for(off: dpos, len: dlen); |
1026 | if (need_padding(len: dlen)) |
1027 | sg_cnt++; |
1028 | } else { |
1029 | ceph_msg_data_cursor_init(cursor: &cursor, msg, length: dlen); |
1030 | sg_cnt += calc_sg_cnt_cursor(cursor: &cursor); |
1031 | } |
1032 | } |
1033 | |
1034 | ret = sg_alloc_table(sgt, sg_cnt, GFP_NOIO); |
1035 | if (ret) |
1036 | return ret; |
1037 | |
1038 | cur_sg = sgt->sgl; |
1039 | if (front_len(msg)) |
1040 | init_sgs(sg: &cur_sg, buf: msg->front.iov_base, buf_len: front_len(msg), |
1041 | pad: front_pad); |
1042 | if (middle_len(msg)) |
1043 | init_sgs(sg: &cur_sg, buf: msg->middle->vec.iov_base, buf_len: middle_len(msg), |
1044 | pad: middle_pad); |
1045 | if (dlen) { |
1046 | if (pages) { |
1047 | init_sgs_pages(sg: &cur_sg, pages, dpos, dlen, pad: data_pad); |
1048 | } else { |
1049 | ceph_msg_data_cursor_init(cursor: &cursor, msg, length: dlen); |
1050 | init_sgs_cursor(sg: &cur_sg, cursor: &cursor, pad: data_pad); |
1051 | } |
1052 | } |
1053 | |
1054 | WARN_ON(!sg_is_last(cur_sg)); |
1055 | sg_set_buf(sg: cur_sg, buf: epilogue, |
1056 | CEPH_GCM_BLOCK_LEN + (add_tag ? CEPH_GCM_TAG_LEN : 0)); |
1057 | return 0; |
1058 | } |
1059 | |
1060 | static int decrypt_preamble(struct ceph_connection *con) |
1061 | { |
1062 | struct scatterlist sg; |
1063 | |
1064 | sg_init_one(&sg, con->v2.in_buf, CEPH_PREAMBLE_SECURE_LEN); |
1065 | return gcm_crypt(con, encrypt: false, src: &sg, dst: &sg, CEPH_PREAMBLE_SECURE_LEN); |
1066 | } |
1067 | |
1068 | static int decrypt_control_remainder(struct ceph_connection *con) |
1069 | { |
1070 | int ctrl_len = con->v2.in_desc.fd_lens[0]; |
1071 | int rem_len = ctrl_len - CEPH_PREAMBLE_INLINE_LEN; |
1072 | int pt_len = padding_len(len: rem_len) + CEPH_GCM_TAG_LEN; |
1073 | struct scatterlist sgs[2]; |
1074 | |
1075 | WARN_ON(con->v2.in_kvecs[0].iov_len != rem_len); |
1076 | WARN_ON(con->v2.in_kvecs[1].iov_len != pt_len); |
1077 | |
1078 | sg_init_table(sgs, 2); |
1079 | sg_set_buf(sg: &sgs[0], buf: con->v2.in_kvecs[0].iov_base, buflen: rem_len); |
1080 | sg_set_buf(sg: &sgs[1], buf: con->v2.in_buf, buflen: pt_len); |
1081 | |
1082 | return gcm_crypt(con, encrypt: false, src: sgs, dst: sgs, |
1083 | src_len: padded_len(len: rem_len) + CEPH_GCM_TAG_LEN); |
1084 | } |
1085 | |
1086 | /* Process sparse read data that lives in a buffer */ |
1087 | static int process_v2_sparse_read(struct ceph_connection *con, |
1088 | struct page **pages, int spos) |
1089 | { |
1090 | struct ceph_msg_data_cursor *cursor = &con->v2.in_cursor; |
1091 | int ret; |
1092 | |
1093 | for (;;) { |
1094 | char *buf = NULL; |
1095 | |
1096 | ret = con->ops->sparse_read(con, cursor, &buf); |
1097 | if (ret <= 0) |
1098 | return ret; |
1099 | |
1100 | dout("%s: sparse_read return %x buf %p\n" , __func__, ret, buf); |
1101 | |
1102 | do { |
1103 | int idx = spos >> PAGE_SHIFT; |
1104 | int soff = offset_in_page(spos); |
1105 | struct page *spage = con->v2.in_enc_pages[idx]; |
1106 | int len = min_t(int, ret, PAGE_SIZE - soff); |
1107 | |
1108 | if (buf) { |
1109 | memcpy_from_page(to: buf, page: spage, offset: soff, len); |
1110 | buf += len; |
1111 | } else { |
1112 | struct bio_vec bv; |
1113 | |
1114 | get_bvec_at(cursor, bv: &bv); |
1115 | len = min_t(int, len, bv.bv_len); |
1116 | memcpy_page(dst_page: bv.bv_page, dst_off: bv.bv_offset, |
1117 | src_page: spage, src_off: soff, len); |
1118 | ceph_msg_data_advance(cursor, bytes: len); |
1119 | } |
1120 | spos += len; |
1121 | ret -= len; |
1122 | } while (ret); |
1123 | } |
1124 | } |
1125 | |
1126 | static int decrypt_tail(struct ceph_connection *con) |
1127 | { |
1128 | struct sg_table enc_sgt = {}; |
1129 | struct sg_table sgt = {}; |
1130 | struct page **pages = NULL; |
1131 | bool sparse = !!con->in_msg->sparse_read_total; |
1132 | int dpos = 0; |
1133 | int tail_len; |
1134 | int ret; |
1135 | |
1136 | tail_len = tail_onwire_len(msg: con->in_msg, secure: true); |
1137 | ret = sg_alloc_table_from_pages(sgt: &enc_sgt, pages: con->v2.in_enc_pages, |
1138 | n_pages: con->v2.in_enc_page_cnt, offset: 0, size: tail_len, |
1139 | GFP_NOIO); |
1140 | if (ret) |
1141 | goto out; |
1142 | |
1143 | if (sparse) { |
1144 | dpos = padded_len(len: front_len(msg: con->in_msg) + padded_len(len: middle_len(msg: con->in_msg))); |
1145 | pages = con->v2.in_enc_pages; |
1146 | } |
1147 | |
1148 | ret = setup_message_sgs(sgt: &sgt, msg: con->in_msg, FRONT_PAD(con->v2.in_buf), |
1149 | MIDDLE_PAD(con->v2.in_buf), DATA_PAD(con->v2.in_buf), |
1150 | epilogue: con->v2.in_buf, pages, dpos, add_tag: true); |
1151 | if (ret) |
1152 | goto out; |
1153 | |
1154 | dout("%s con %p msg %p enc_page_cnt %d sg_cnt %d\n" , __func__, con, |
1155 | con->in_msg, con->v2.in_enc_page_cnt, sgt.orig_nents); |
1156 | ret = gcm_crypt(con, encrypt: false, src: enc_sgt.sgl, dst: sgt.sgl, src_len: tail_len); |
1157 | if (ret) |
1158 | goto out; |
1159 | |
1160 | if (sparse && data_len(msg: con->in_msg)) { |
1161 | ret = process_v2_sparse_read(con, pages: con->v2.in_enc_pages, spos: dpos); |
1162 | if (ret) |
1163 | goto out; |
1164 | } |
1165 | |
1166 | WARN_ON(!con->v2.in_enc_page_cnt); |
1167 | ceph_release_page_vector(pages: con->v2.in_enc_pages, |
1168 | num_pages: con->v2.in_enc_page_cnt); |
1169 | con->v2.in_enc_pages = NULL; |
1170 | con->v2.in_enc_page_cnt = 0; |
1171 | |
1172 | out: |
1173 | sg_free_table(&sgt); |
1174 | sg_free_table(&enc_sgt); |
1175 | return ret; |
1176 | } |
1177 | |
1178 | static int prepare_banner(struct ceph_connection *con) |
1179 | { |
1180 | int buf_len = CEPH_BANNER_V2_LEN + 2 + 8 + 8; |
1181 | void *buf, *p; |
1182 | |
1183 | buf = alloc_conn_buf(con, len: buf_len); |
1184 | if (!buf) |
1185 | return -ENOMEM; |
1186 | |
1187 | p = buf; |
1188 | ceph_encode_copy(p: &p, CEPH_BANNER_V2, CEPH_BANNER_V2_LEN); |
1189 | ceph_encode_16(p: &p, v: sizeof(u64) + sizeof(u64)); |
1190 | ceph_encode_64(p: &p, CEPH_MSGR2_SUPPORTED_FEATURES); |
1191 | ceph_encode_64(p: &p, CEPH_MSGR2_REQUIRED_FEATURES); |
1192 | WARN_ON(p != buf + buf_len); |
1193 | |
1194 | add_out_kvec(con, buf, len: buf_len); |
1195 | add_out_sign_kvec(con, buf, len: buf_len); |
1196 | ceph_con_flag_set(con, CEPH_CON_F_WRITE_PENDING); |
1197 | return 0; |
1198 | } |
1199 | |
1200 | /* |
1201 | * base: |
1202 | * preamble |
1203 | * control body (ctrl_len bytes) |
1204 | * space for control crc |
1205 | * |
1206 | * extdata (optional): |
1207 | * control body (extdata_len bytes) |
1208 | * |
1209 | * Compute control crc and gather base and extdata into: |
1210 | * |
1211 | * preamble |
1212 | * control body (ctrl_len + extdata_len bytes) |
1213 | * control crc |
1214 | * |
1215 | * Preamble should already be encoded at the start of base. |
1216 | */ |
1217 | static void prepare_head_plain(struct ceph_connection *con, void *base, |
1218 | int ctrl_len, void *extdata, int extdata_len, |
1219 | bool to_be_signed) |
1220 | { |
1221 | int base_len = CEPH_PREAMBLE_LEN + ctrl_len + CEPH_CRC_LEN; |
1222 | void *crcp = base + base_len - CEPH_CRC_LEN; |
1223 | u32 crc; |
1224 | |
1225 | crc = crc32c(crc: -1, CTRL_BODY(base), length: ctrl_len); |
1226 | if (extdata_len) |
1227 | crc = crc32c(crc, address: extdata, length: extdata_len); |
1228 | put_unaligned_le32(val: crc, p: crcp); |
1229 | |
1230 | if (!extdata_len) { |
1231 | add_out_kvec(con, buf: base, len: base_len); |
1232 | if (to_be_signed) |
1233 | add_out_sign_kvec(con, buf: base, len: base_len); |
1234 | return; |
1235 | } |
1236 | |
1237 | add_out_kvec(con, buf: base, len: crcp - base); |
1238 | add_out_kvec(con, buf: extdata, len: extdata_len); |
1239 | add_out_kvec(con, buf: crcp, CEPH_CRC_LEN); |
1240 | if (to_be_signed) { |
1241 | add_out_sign_kvec(con, buf: base, len: crcp - base); |
1242 | add_out_sign_kvec(con, buf: extdata, len: extdata_len); |
1243 | add_out_sign_kvec(con, buf: crcp, CEPH_CRC_LEN); |
1244 | } |
1245 | } |
1246 | |
1247 | static int prepare_head_secure_small(struct ceph_connection *con, |
1248 | void *base, int ctrl_len) |
1249 | { |
1250 | struct scatterlist sg; |
1251 | int ret; |
1252 | |
1253 | /* inline buffer padding? */ |
1254 | if (ctrl_len < CEPH_PREAMBLE_INLINE_LEN) |
1255 | memset(CTRL_BODY(base) + ctrl_len, 0, |
1256 | CEPH_PREAMBLE_INLINE_LEN - ctrl_len); |
1257 | |
1258 | sg_init_one(&sg, base, CEPH_PREAMBLE_SECURE_LEN); |
1259 | ret = gcm_crypt(con, encrypt: true, src: &sg, dst: &sg, |
1260 | CEPH_PREAMBLE_SECURE_LEN - CEPH_GCM_TAG_LEN); |
1261 | if (ret) |
1262 | return ret; |
1263 | |
1264 | add_out_kvec(con, buf: base, CEPH_PREAMBLE_SECURE_LEN); |
1265 | return 0; |
1266 | } |
1267 | |
1268 | /* |
1269 | * base: |
1270 | * preamble |
1271 | * control body (ctrl_len bytes) |
1272 | * space for padding, if needed |
1273 | * space for control remainder auth tag |
1274 | * space for preamble auth tag |
1275 | * |
1276 | * Encrypt preamble and the inline portion, then encrypt the remainder |
1277 | * and gather into: |
1278 | * |
1279 | * preamble |
1280 | * control body (48 bytes) |
1281 | * preamble auth tag |
1282 | * control body (ctrl_len - 48 bytes) |
1283 | * zero padding, if needed |
1284 | * control remainder auth tag |
1285 | * |
1286 | * Preamble should already be encoded at the start of base. |
1287 | */ |
1288 | static int prepare_head_secure_big(struct ceph_connection *con, |
1289 | void *base, int ctrl_len) |
1290 | { |
1291 | int rem_len = ctrl_len - CEPH_PREAMBLE_INLINE_LEN; |
1292 | void *rem = CTRL_BODY(base) + CEPH_PREAMBLE_INLINE_LEN; |
1293 | void *rem_tag = rem + padded_len(len: rem_len); |
1294 | void *pmbl_tag = rem_tag + CEPH_GCM_TAG_LEN; |
1295 | struct scatterlist sgs[2]; |
1296 | int ret; |
1297 | |
1298 | sg_init_table(sgs, 2); |
1299 | sg_set_buf(sg: &sgs[0], buf: base, buflen: rem - base); |
1300 | sg_set_buf(sg: &sgs[1], buf: pmbl_tag, CEPH_GCM_TAG_LEN); |
1301 | ret = gcm_crypt(con, encrypt: true, src: sgs, dst: sgs, src_len: rem - base); |
1302 | if (ret) |
1303 | return ret; |
1304 | |
1305 | /* control remainder padding? */ |
1306 | if (need_padding(len: rem_len)) |
1307 | memset(rem + rem_len, 0, padding_len(rem_len)); |
1308 | |
1309 | sg_init_one(&sgs[0], rem, pmbl_tag - rem); |
1310 | ret = gcm_crypt(con, encrypt: true, src: sgs, dst: sgs, src_len: rem_tag - rem); |
1311 | if (ret) |
1312 | return ret; |
1313 | |
1314 | add_out_kvec(con, buf: base, len: rem - base); |
1315 | add_out_kvec(con, buf: pmbl_tag, CEPH_GCM_TAG_LEN); |
1316 | add_out_kvec(con, buf: rem, len: pmbl_tag - rem); |
1317 | return 0; |
1318 | } |
1319 | |
1320 | static int __prepare_control(struct ceph_connection *con, int tag, |
1321 | void *base, int ctrl_len, void *extdata, |
1322 | int extdata_len, bool to_be_signed) |
1323 | { |
1324 | int total_len = ctrl_len + extdata_len; |
1325 | struct ceph_frame_desc desc; |
1326 | int ret; |
1327 | |
1328 | dout("%s con %p tag %d len %d (%d+%d)\n" , __func__, con, tag, |
1329 | total_len, ctrl_len, extdata_len); |
1330 | |
1331 | /* extdata may be vmalloc'ed but not base */ |
1332 | if (WARN_ON(is_vmalloc_addr(base) || !ctrl_len)) |
1333 | return -EINVAL; |
1334 | |
1335 | init_frame_desc(desc: &desc, tag, lens: &total_len, len_cnt: 1); |
1336 | encode_preamble(desc: &desc, p: base); |
1337 | |
1338 | if (con_secure(con)) { |
1339 | if (WARN_ON(extdata_len || to_be_signed)) |
1340 | return -EINVAL; |
1341 | |
1342 | if (ctrl_len <= CEPH_PREAMBLE_INLINE_LEN) |
1343 | /* fully inlined, inline buffer may need padding */ |
1344 | ret = prepare_head_secure_small(con, base, ctrl_len); |
1345 | else |
1346 | /* partially inlined, inline buffer is full */ |
1347 | ret = prepare_head_secure_big(con, base, ctrl_len); |
1348 | if (ret) |
1349 | return ret; |
1350 | } else { |
1351 | prepare_head_plain(con, base, ctrl_len, extdata, extdata_len, |
1352 | to_be_signed); |
1353 | } |
1354 | |
1355 | ceph_con_flag_set(con, CEPH_CON_F_WRITE_PENDING); |
1356 | return 0; |
1357 | } |
1358 | |
1359 | static int prepare_control(struct ceph_connection *con, int tag, |
1360 | void *base, int ctrl_len) |
1361 | { |
1362 | return __prepare_control(con, tag, base, ctrl_len, NULL, extdata_len: 0, to_be_signed: false); |
1363 | } |
1364 | |
1365 | static int prepare_hello(struct ceph_connection *con) |
1366 | { |
1367 | void *buf, *p; |
1368 | int ctrl_len; |
1369 | |
1370 | ctrl_len = 1 + ceph_entity_addr_encoding_len(addr: &con->peer_addr); |
1371 | buf = alloc_conn_buf(con, len: head_onwire_len(ctrl_len, secure: false)); |
1372 | if (!buf) |
1373 | return -ENOMEM; |
1374 | |
1375 | p = CTRL_BODY(buf); |
1376 | ceph_encode_8(p: &p, CEPH_ENTITY_TYPE_CLIENT); |
1377 | ceph_encode_entity_addr(p: &p, addr: &con->peer_addr); |
1378 | WARN_ON(p != CTRL_BODY(buf) + ctrl_len); |
1379 | |
1380 | return __prepare_control(con, FRAME_TAG_HELLO, base: buf, ctrl_len, |
1381 | NULL, extdata_len: 0, to_be_signed: true); |
1382 | } |
1383 | |
1384 | /* so that head_onwire_len(AUTH_BUF_LEN, false) is 512 */ |
1385 | #define AUTH_BUF_LEN (512 - CEPH_CRC_LEN - CEPH_PREAMBLE_PLAIN_LEN) |
1386 | |
1387 | static int prepare_auth_request(struct ceph_connection *con) |
1388 | { |
1389 | void *authorizer, *authorizer_copy; |
1390 | int ctrl_len, authorizer_len; |
1391 | void *buf; |
1392 | int ret; |
1393 | |
1394 | ctrl_len = AUTH_BUF_LEN; |
1395 | buf = alloc_conn_buf(con, len: head_onwire_len(ctrl_len, secure: false)); |
1396 | if (!buf) |
1397 | return -ENOMEM; |
1398 | |
1399 | mutex_unlock(lock: &con->mutex); |
1400 | ret = con->ops->get_auth_request(con, CTRL_BODY(buf), &ctrl_len, |
1401 | &authorizer, &authorizer_len); |
1402 | mutex_lock(&con->mutex); |
1403 | if (con->state != CEPH_CON_S_V2_HELLO) { |
1404 | dout("%s con %p state changed to %d\n" , __func__, con, |
1405 | con->state); |
1406 | return -EAGAIN; |
1407 | } |
1408 | |
1409 | dout("%s con %p get_auth_request ret %d\n" , __func__, con, ret); |
1410 | if (ret) |
1411 | return ret; |
1412 | |
1413 | authorizer_copy = alloc_conn_buf(con, len: authorizer_len); |
1414 | if (!authorizer_copy) |
1415 | return -ENOMEM; |
1416 | |
1417 | memcpy(authorizer_copy, authorizer, authorizer_len); |
1418 | |
1419 | return __prepare_control(con, FRAME_TAG_AUTH_REQUEST, base: buf, ctrl_len, |
1420 | extdata: authorizer_copy, extdata_len: authorizer_len, to_be_signed: true); |
1421 | } |
1422 | |
1423 | static int prepare_auth_request_more(struct ceph_connection *con, |
1424 | void *reply, int reply_len) |
1425 | { |
1426 | int ctrl_len, authorizer_len; |
1427 | void *authorizer; |
1428 | void *buf; |
1429 | int ret; |
1430 | |
1431 | ctrl_len = AUTH_BUF_LEN; |
1432 | buf = alloc_conn_buf(con, len: head_onwire_len(ctrl_len, secure: false)); |
1433 | if (!buf) |
1434 | return -ENOMEM; |
1435 | |
1436 | mutex_unlock(lock: &con->mutex); |
1437 | ret = con->ops->handle_auth_reply_more(con, reply, reply_len, |
1438 | CTRL_BODY(buf), &ctrl_len, |
1439 | &authorizer, &authorizer_len); |
1440 | mutex_lock(&con->mutex); |
1441 | if (con->state != CEPH_CON_S_V2_AUTH) { |
1442 | dout("%s con %p state changed to %d\n" , __func__, con, |
1443 | con->state); |
1444 | return -EAGAIN; |
1445 | } |
1446 | |
1447 | dout("%s con %p handle_auth_reply_more ret %d\n" , __func__, con, ret); |
1448 | if (ret) |
1449 | return ret; |
1450 | |
1451 | return __prepare_control(con, FRAME_TAG_AUTH_REQUEST_MORE, base: buf, |
1452 | ctrl_len, extdata: authorizer, extdata_len: authorizer_len, to_be_signed: true); |
1453 | } |
1454 | |
1455 | static int prepare_auth_signature(struct ceph_connection *con) |
1456 | { |
1457 | void *buf; |
1458 | int ret; |
1459 | |
1460 | buf = alloc_conn_buf(con, len: head_onwire_len(SHA256_DIGEST_SIZE, |
1461 | secure: con_secure(con))); |
1462 | if (!buf) |
1463 | return -ENOMEM; |
1464 | |
1465 | ret = hmac_sha256(con, kvecs: con->v2.in_sign_kvecs, kvec_cnt: con->v2.in_sign_kvec_cnt, |
1466 | CTRL_BODY(buf)); |
1467 | if (ret) |
1468 | return ret; |
1469 | |
1470 | return prepare_control(con, FRAME_TAG_AUTH_SIGNATURE, base: buf, |
1471 | SHA256_DIGEST_SIZE); |
1472 | } |
1473 | |
1474 | static int prepare_client_ident(struct ceph_connection *con) |
1475 | { |
1476 | struct ceph_entity_addr *my_addr = &con->msgr->inst.addr; |
1477 | struct ceph_client *client = from_msgr(con->msgr); |
1478 | u64 global_id = ceph_client_gid(client); |
1479 | void *buf, *p; |
1480 | int ctrl_len; |
1481 | |
1482 | WARN_ON(con->v2.server_cookie); |
1483 | WARN_ON(con->v2.connect_seq); |
1484 | WARN_ON(con->v2.peer_global_seq); |
1485 | |
1486 | if (!con->v2.client_cookie) { |
1487 | do { |
1488 | get_random_bytes(buf: &con->v2.client_cookie, |
1489 | len: sizeof(con->v2.client_cookie)); |
1490 | } while (!con->v2.client_cookie); |
1491 | dout("%s con %p generated cookie 0x%llx\n" , __func__, con, |
1492 | con->v2.client_cookie); |
1493 | } else { |
1494 | dout("%s con %p cookie already set 0x%llx\n" , __func__, con, |
1495 | con->v2.client_cookie); |
1496 | } |
1497 | |
1498 | 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" , |
1499 | __func__, con, ceph_pr_addr(my_addr), le32_to_cpu(my_addr->nonce), |
1500 | ceph_pr_addr(&con->peer_addr), le32_to_cpu(con->peer_addr.nonce), |
1501 | global_id, con->v2.global_seq, client->supported_features, |
1502 | client->required_features, con->v2.client_cookie); |
1503 | |
1504 | ctrl_len = 1 + 4 + ceph_entity_addr_encoding_len(addr: my_addr) + |
1505 | ceph_entity_addr_encoding_len(addr: &con->peer_addr) + 6 * 8; |
1506 | buf = alloc_conn_buf(con, len: head_onwire_len(ctrl_len, secure: con_secure(con))); |
1507 | if (!buf) |
1508 | return -ENOMEM; |
1509 | |
1510 | p = CTRL_BODY(buf); |
1511 | ceph_encode_8(p: &p, v: 2); /* addrvec marker */ |
1512 | ceph_encode_32(p: &p, v: 1); /* addr_cnt */ |
1513 | ceph_encode_entity_addr(p: &p, addr: my_addr); |
1514 | ceph_encode_entity_addr(p: &p, addr: &con->peer_addr); |
1515 | ceph_encode_64(p: &p, v: global_id); |
1516 | ceph_encode_64(p: &p, v: con->v2.global_seq); |
1517 | ceph_encode_64(p: &p, v: client->supported_features); |
1518 | ceph_encode_64(p: &p, v: client->required_features); |
1519 | ceph_encode_64(p: &p, v: 0); /* flags */ |
1520 | ceph_encode_64(p: &p, v: con->v2.client_cookie); |
1521 | WARN_ON(p != CTRL_BODY(buf) + ctrl_len); |
1522 | |
1523 | return prepare_control(con, FRAME_TAG_CLIENT_IDENT, base: buf, ctrl_len); |
1524 | } |
1525 | |
1526 | static int prepare_session_reconnect(struct ceph_connection *con) |
1527 | { |
1528 | struct ceph_entity_addr *my_addr = &con->msgr->inst.addr; |
1529 | void *buf, *p; |
1530 | int ctrl_len; |
1531 | |
1532 | WARN_ON(!con->v2.client_cookie); |
1533 | WARN_ON(!con->v2.server_cookie); |
1534 | WARN_ON(!con->v2.connect_seq); |
1535 | WARN_ON(!con->v2.peer_global_seq); |
1536 | |
1537 | 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" , |
1538 | __func__, con, ceph_pr_addr(my_addr), le32_to_cpu(my_addr->nonce), |
1539 | con->v2.client_cookie, con->v2.server_cookie, con->v2.global_seq, |
1540 | con->v2.connect_seq, con->in_seq); |
1541 | |
1542 | ctrl_len = 1 + 4 + ceph_entity_addr_encoding_len(addr: my_addr) + 5 * 8; |
1543 | buf = alloc_conn_buf(con, len: head_onwire_len(ctrl_len, secure: con_secure(con))); |
1544 | if (!buf) |
1545 | return -ENOMEM; |
1546 | |
1547 | p = CTRL_BODY(buf); |
1548 | ceph_encode_8(p: &p, v: 2); /* entity_addrvec_t marker */ |
1549 | ceph_encode_32(p: &p, v: 1); /* my_addrs len */ |
1550 | ceph_encode_entity_addr(p: &p, addr: my_addr); |
1551 | ceph_encode_64(p: &p, v: con->v2.client_cookie); |
1552 | ceph_encode_64(p: &p, v: con->v2.server_cookie); |
1553 | ceph_encode_64(p: &p, v: con->v2.global_seq); |
1554 | ceph_encode_64(p: &p, v: con->v2.connect_seq); |
1555 | ceph_encode_64(p: &p, v: con->in_seq); |
1556 | WARN_ON(p != CTRL_BODY(buf) + ctrl_len); |
1557 | |
1558 | return prepare_control(con, FRAME_TAG_SESSION_RECONNECT, base: buf, ctrl_len); |
1559 | } |
1560 | |
1561 | static int prepare_keepalive2(struct ceph_connection *con) |
1562 | { |
1563 | struct ceph_timespec *ts = CTRL_BODY(con->v2.out_buf); |
1564 | struct timespec64 now; |
1565 | |
1566 | ktime_get_real_ts64(tv: &now); |
1567 | dout("%s con %p timestamp %lld.%09ld\n" , __func__, con, now.tv_sec, |
1568 | now.tv_nsec); |
1569 | |
1570 | ceph_encode_timespec64(tv: ts, ts: &now); |
1571 | |
1572 | reset_out_kvecs(con); |
1573 | return prepare_control(con, FRAME_TAG_KEEPALIVE2, base: con->v2.out_buf, |
1574 | ctrl_len: sizeof(struct ceph_timespec)); |
1575 | } |
1576 | |
1577 | static int prepare_ack(struct ceph_connection *con) |
1578 | { |
1579 | void *p; |
1580 | |
1581 | dout("%s con %p in_seq_acked %llu -> %llu\n" , __func__, con, |
1582 | con->in_seq_acked, con->in_seq); |
1583 | con->in_seq_acked = con->in_seq; |
1584 | |
1585 | p = CTRL_BODY(con->v2.out_buf); |
1586 | ceph_encode_64(p: &p, v: con->in_seq_acked); |
1587 | |
1588 | reset_out_kvecs(con); |
1589 | return prepare_control(con, FRAME_TAG_ACK, base: con->v2.out_buf, ctrl_len: 8); |
1590 | } |
1591 | |
1592 | static void prepare_epilogue_plain(struct ceph_connection *con, bool aborted) |
1593 | { |
1594 | dout("%s con %p msg %p aborted %d crcs %u %u %u\n" , __func__, con, |
1595 | con->out_msg, aborted, con->v2.out_epil.front_crc, |
1596 | con->v2.out_epil.middle_crc, con->v2.out_epil.data_crc); |
1597 | |
1598 | encode_epilogue_plain(con, aborted); |
1599 | add_out_kvec(con, buf: &con->v2.out_epil, CEPH_EPILOGUE_PLAIN_LEN); |
1600 | } |
1601 | |
1602 | /* |
1603 | * For "used" empty segments, crc is -1. For unused (trailing) |
1604 | * segments, crc is 0. |
1605 | */ |
1606 | static void prepare_message_plain(struct ceph_connection *con) |
1607 | { |
1608 | struct ceph_msg *msg = con->out_msg; |
1609 | |
1610 | prepare_head_plain(con, base: con->v2.out_buf, |
1611 | ctrl_len: sizeof(struct ceph_msg_header2), NULL, extdata_len: 0, to_be_signed: false); |
1612 | |
1613 | if (!front_len(msg) && !middle_len(msg)) { |
1614 | if (!data_len(msg)) { |
1615 | /* |
1616 | * Empty message: once the head is written, |
1617 | * we are done -- there is no epilogue. |
1618 | */ |
1619 | con->v2.out_state = OUT_S_FINISH_MESSAGE; |
1620 | return; |
1621 | } |
1622 | |
1623 | con->v2.out_epil.front_crc = -1; |
1624 | con->v2.out_epil.middle_crc = -1; |
1625 | con->v2.out_state = OUT_S_QUEUE_DATA; |
1626 | return; |
1627 | } |
1628 | |
1629 | if (front_len(msg)) { |
1630 | con->v2.out_epil.front_crc = crc32c(crc: -1, address: msg->front.iov_base, |
1631 | length: front_len(msg)); |
1632 | add_out_kvec(con, buf: msg->front.iov_base, len: front_len(msg)); |
1633 | } else { |
1634 | /* middle (at least) is there, checked above */ |
1635 | con->v2.out_epil.front_crc = -1; |
1636 | } |
1637 | |
1638 | if (middle_len(msg)) { |
1639 | con->v2.out_epil.middle_crc = |
1640 | crc32c(crc: -1, address: msg->middle->vec.iov_base, length: middle_len(msg)); |
1641 | add_out_kvec(con, buf: msg->middle->vec.iov_base, len: middle_len(msg)); |
1642 | } else { |
1643 | con->v2.out_epil.middle_crc = data_len(msg) ? -1 : 0; |
1644 | } |
1645 | |
1646 | if (data_len(msg)) { |
1647 | con->v2.out_state = OUT_S_QUEUE_DATA; |
1648 | } else { |
1649 | con->v2.out_epil.data_crc = 0; |
1650 | prepare_epilogue_plain(con, aborted: false); |
1651 | con->v2.out_state = OUT_S_FINISH_MESSAGE; |
1652 | } |
1653 | } |
1654 | |
1655 | /* |
1656 | * Unfortunately the kernel crypto API doesn't support streaming |
1657 | * (piecewise) operation for AEAD algorithms, so we can't get away |
1658 | * with a fixed size buffer and a couple sgs. Instead, we have to |
1659 | * allocate pages for the entire tail of the message (currently up |
1660 | * to ~32M) and two sgs arrays (up to ~256K each)... |
1661 | */ |
1662 | static int prepare_message_secure(struct ceph_connection *con) |
1663 | { |
1664 | void *zerop = page_address(ceph_zero_page); |
1665 | struct sg_table enc_sgt = {}; |
1666 | struct sg_table sgt = {}; |
1667 | struct page **enc_pages; |
1668 | int enc_page_cnt; |
1669 | int tail_len; |
1670 | int ret; |
1671 | |
1672 | ret = prepare_head_secure_small(con, base: con->v2.out_buf, |
1673 | ctrl_len: sizeof(struct ceph_msg_header2)); |
1674 | if (ret) |
1675 | return ret; |
1676 | |
1677 | tail_len = tail_onwire_len(msg: con->out_msg, secure: true); |
1678 | if (!tail_len) { |
1679 | /* |
1680 | * Empty message: once the head is written, |
1681 | * we are done -- there is no epilogue. |
1682 | */ |
1683 | con->v2.out_state = OUT_S_FINISH_MESSAGE; |
1684 | return 0; |
1685 | } |
1686 | |
1687 | encode_epilogue_secure(con, aborted: false); |
1688 | ret = setup_message_sgs(sgt: &sgt, msg: con->out_msg, front_pad: zerop, middle_pad: zerop, data_pad: zerop, |
1689 | epilogue: &con->v2.out_epil, NULL, dpos: 0, add_tag: false); |
1690 | if (ret) |
1691 | goto out; |
1692 | |
1693 | enc_page_cnt = calc_pages_for(off: 0, len: tail_len); |
1694 | enc_pages = ceph_alloc_page_vector(num_pages: enc_page_cnt, GFP_NOIO); |
1695 | if (IS_ERR(ptr: enc_pages)) { |
1696 | ret = PTR_ERR(ptr: enc_pages); |
1697 | goto out; |
1698 | } |
1699 | |
1700 | WARN_ON(con->v2.out_enc_pages || con->v2.out_enc_page_cnt); |
1701 | con->v2.out_enc_pages = enc_pages; |
1702 | con->v2.out_enc_page_cnt = enc_page_cnt; |
1703 | con->v2.out_enc_resid = tail_len; |
1704 | con->v2.out_enc_i = 0; |
1705 | |
1706 | ret = sg_alloc_table_from_pages(sgt: &enc_sgt, pages: enc_pages, n_pages: enc_page_cnt, |
1707 | offset: 0, size: tail_len, GFP_NOIO); |
1708 | if (ret) |
1709 | goto out; |
1710 | |
1711 | ret = gcm_crypt(con, encrypt: true, src: sgt.sgl, dst: enc_sgt.sgl, |
1712 | src_len: tail_len - CEPH_GCM_TAG_LEN); |
1713 | if (ret) |
1714 | goto out; |
1715 | |
1716 | dout("%s con %p msg %p sg_cnt %d enc_page_cnt %d\n" , __func__, con, |
1717 | con->out_msg, sgt.orig_nents, enc_page_cnt); |
1718 | con->v2.out_state = OUT_S_QUEUE_ENC_PAGE; |
1719 | |
1720 | out: |
1721 | sg_free_table(&sgt); |
1722 | sg_free_table(&enc_sgt); |
1723 | return ret; |
1724 | } |
1725 | |
1726 | static int prepare_message(struct ceph_connection *con) |
1727 | { |
1728 | int lens[] = { |
1729 | sizeof(struct ceph_msg_header2), |
1730 | front_len(msg: con->out_msg), |
1731 | middle_len(msg: con->out_msg), |
1732 | data_len(msg: con->out_msg) |
1733 | }; |
1734 | struct ceph_frame_desc desc; |
1735 | int ret; |
1736 | |
1737 | dout("%s con %p msg %p logical %d+%d+%d+%d\n" , __func__, con, |
1738 | con->out_msg, lens[0], lens[1], lens[2], lens[3]); |
1739 | |
1740 | if (con->in_seq > con->in_seq_acked) { |
1741 | dout("%s con %p in_seq_acked %llu -> %llu\n" , __func__, con, |
1742 | con->in_seq_acked, con->in_seq); |
1743 | con->in_seq_acked = con->in_seq; |
1744 | } |
1745 | |
1746 | reset_out_kvecs(con); |
1747 | init_frame_desc(desc: &desc, FRAME_TAG_MESSAGE, lens, len_cnt: 4); |
1748 | encode_preamble(desc: &desc, p: con->v2.out_buf); |
1749 | fill_header2(CTRL_BODY(con->v2.out_buf), hdr: &con->out_msg->hdr, |
1750 | ack_seq: con->in_seq_acked); |
1751 | |
1752 | if (con_secure(con)) { |
1753 | ret = prepare_message_secure(con); |
1754 | if (ret) |
1755 | return ret; |
1756 | } else { |
1757 | prepare_message_plain(con); |
1758 | } |
1759 | |
1760 | ceph_con_flag_set(con, CEPH_CON_F_WRITE_PENDING); |
1761 | return 0; |
1762 | } |
1763 | |
1764 | static int prepare_read_banner_prefix(struct ceph_connection *con) |
1765 | { |
1766 | void *buf; |
1767 | |
1768 | buf = alloc_conn_buf(con, CEPH_BANNER_V2_PREFIX_LEN); |
1769 | if (!buf) |
1770 | return -ENOMEM; |
1771 | |
1772 | reset_in_kvecs(con); |
1773 | add_in_kvec(con, buf, CEPH_BANNER_V2_PREFIX_LEN); |
1774 | add_in_sign_kvec(con, buf, CEPH_BANNER_V2_PREFIX_LEN); |
1775 | con->state = CEPH_CON_S_V2_BANNER_PREFIX; |
1776 | return 0; |
1777 | } |
1778 | |
1779 | static int prepare_read_banner_payload(struct ceph_connection *con, |
1780 | int payload_len) |
1781 | { |
1782 | void *buf; |
1783 | |
1784 | buf = alloc_conn_buf(con, len: payload_len); |
1785 | if (!buf) |
1786 | return -ENOMEM; |
1787 | |
1788 | reset_in_kvecs(con); |
1789 | add_in_kvec(con, buf, len: payload_len); |
1790 | add_in_sign_kvec(con, buf, len: payload_len); |
1791 | con->state = CEPH_CON_S_V2_BANNER_PAYLOAD; |
1792 | return 0; |
1793 | } |
1794 | |
1795 | static void prepare_read_preamble(struct ceph_connection *con) |
1796 | { |
1797 | reset_in_kvecs(con); |
1798 | add_in_kvec(con, buf: con->v2.in_buf, |
1799 | len: con_secure(con) ? CEPH_PREAMBLE_SECURE_LEN : |
1800 | CEPH_PREAMBLE_PLAIN_LEN); |
1801 | con->v2.in_state = IN_S_HANDLE_PREAMBLE; |
1802 | } |
1803 | |
1804 | static int prepare_read_control(struct ceph_connection *con) |
1805 | { |
1806 | int ctrl_len = con->v2.in_desc.fd_lens[0]; |
1807 | int head_len; |
1808 | void *buf; |
1809 | |
1810 | reset_in_kvecs(con); |
1811 | if (con->state == CEPH_CON_S_V2_HELLO || |
1812 | con->state == CEPH_CON_S_V2_AUTH) { |
1813 | head_len = head_onwire_len(ctrl_len, secure: false); |
1814 | buf = alloc_conn_buf(con, len: head_len); |
1815 | if (!buf) |
1816 | return -ENOMEM; |
1817 | |
1818 | /* preserve preamble */ |
1819 | memcpy(buf, con->v2.in_buf, CEPH_PREAMBLE_LEN); |
1820 | |
1821 | add_in_kvec(con, CTRL_BODY(buf), len: ctrl_len); |
1822 | add_in_kvec(con, CTRL_BODY(buf) + ctrl_len, CEPH_CRC_LEN); |
1823 | add_in_sign_kvec(con, buf, len: head_len); |
1824 | } else { |
1825 | if (ctrl_len > CEPH_PREAMBLE_INLINE_LEN) { |
1826 | buf = alloc_conn_buf(con, len: ctrl_len); |
1827 | if (!buf) |
1828 | return -ENOMEM; |
1829 | |
1830 | add_in_kvec(con, buf, len: ctrl_len); |
1831 | } else { |
1832 | add_in_kvec(con, CTRL_BODY(con->v2.in_buf), len: ctrl_len); |
1833 | } |
1834 | add_in_kvec(con, buf: con->v2.in_buf, CEPH_CRC_LEN); |
1835 | } |
1836 | con->v2.in_state = IN_S_HANDLE_CONTROL; |
1837 | return 0; |
1838 | } |
1839 | |
1840 | static int prepare_read_control_remainder(struct ceph_connection *con) |
1841 | { |
1842 | int ctrl_len = con->v2.in_desc.fd_lens[0]; |
1843 | int rem_len = ctrl_len - CEPH_PREAMBLE_INLINE_LEN; |
1844 | void *buf; |
1845 | |
1846 | buf = alloc_conn_buf(con, len: ctrl_len); |
1847 | if (!buf) |
1848 | return -ENOMEM; |
1849 | |
1850 | memcpy(buf, CTRL_BODY(con->v2.in_buf), CEPH_PREAMBLE_INLINE_LEN); |
1851 | |
1852 | reset_in_kvecs(con); |
1853 | add_in_kvec(con, buf: buf + CEPH_PREAMBLE_INLINE_LEN, len: rem_len); |
1854 | add_in_kvec(con, buf: con->v2.in_buf, |
1855 | len: padding_len(len: rem_len) + CEPH_GCM_TAG_LEN); |
1856 | con->v2.in_state = IN_S_HANDLE_CONTROL_REMAINDER; |
1857 | return 0; |
1858 | } |
1859 | |
1860 | static int prepare_read_data(struct ceph_connection *con) |
1861 | { |
1862 | struct bio_vec bv; |
1863 | |
1864 | con->in_data_crc = -1; |
1865 | ceph_msg_data_cursor_init(cursor: &con->v2.in_cursor, msg: con->in_msg, |
1866 | length: data_len(msg: con->in_msg)); |
1867 | |
1868 | get_bvec_at(cursor: &con->v2.in_cursor, bv: &bv); |
1869 | if (ceph_test_opt(from_msgr(con->msgr), RXBOUNCE)) { |
1870 | if (unlikely(!con->bounce_page)) { |
1871 | con->bounce_page = alloc_page(GFP_NOIO); |
1872 | if (!con->bounce_page) { |
1873 | pr_err("failed to allocate bounce page\n" ); |
1874 | return -ENOMEM; |
1875 | } |
1876 | } |
1877 | |
1878 | bv.bv_page = con->bounce_page; |
1879 | bv.bv_offset = 0; |
1880 | } |
1881 | set_in_bvec(con, bv: &bv); |
1882 | con->v2.in_state = IN_S_PREPARE_READ_DATA_CONT; |
1883 | return 0; |
1884 | } |
1885 | |
1886 | static void prepare_read_data_cont(struct ceph_connection *con) |
1887 | { |
1888 | struct bio_vec bv; |
1889 | |
1890 | if (ceph_test_opt(from_msgr(con->msgr), RXBOUNCE)) { |
1891 | con->in_data_crc = crc32c(crc: con->in_data_crc, |
1892 | page_address(con->bounce_page), |
1893 | length: con->v2.in_bvec.bv_len); |
1894 | |
1895 | get_bvec_at(cursor: &con->v2.in_cursor, bv: &bv); |
1896 | memcpy_to_page(page: bv.bv_page, offset: bv.bv_offset, |
1897 | page_address(con->bounce_page), |
1898 | len: con->v2.in_bvec.bv_len); |
1899 | } else { |
1900 | con->in_data_crc = ceph_crc32c_page(crc: con->in_data_crc, |
1901 | page: con->v2.in_bvec.bv_page, |
1902 | page_offset: con->v2.in_bvec.bv_offset, |
1903 | length: con->v2.in_bvec.bv_len); |
1904 | } |
1905 | |
1906 | ceph_msg_data_advance(cursor: &con->v2.in_cursor, bytes: con->v2.in_bvec.bv_len); |
1907 | if (con->v2.in_cursor.total_resid) { |
1908 | get_bvec_at(cursor: &con->v2.in_cursor, bv: &bv); |
1909 | if (ceph_test_opt(from_msgr(con->msgr), RXBOUNCE)) { |
1910 | bv.bv_page = con->bounce_page; |
1911 | bv.bv_offset = 0; |
1912 | } |
1913 | set_in_bvec(con, bv: &bv); |
1914 | WARN_ON(con->v2.in_state != IN_S_PREPARE_READ_DATA_CONT); |
1915 | return; |
1916 | } |
1917 | |
1918 | /* |
1919 | * We've read all data. Prepare to read epilogue. |
1920 | */ |
1921 | reset_in_kvecs(con); |
1922 | add_in_kvec(con, buf: con->v2.in_buf, CEPH_EPILOGUE_PLAIN_LEN); |
1923 | con->v2.in_state = IN_S_HANDLE_EPILOGUE; |
1924 | } |
1925 | |
1926 | static int prepare_sparse_read_cont(struct ceph_connection *con) |
1927 | { |
1928 | int ret; |
1929 | struct bio_vec bv; |
1930 | char *buf = NULL; |
1931 | struct ceph_msg_data_cursor *cursor = &con->v2.in_cursor; |
1932 | |
1933 | WARN_ON(con->v2.in_state != IN_S_PREPARE_SPARSE_DATA_CONT); |
1934 | |
1935 | if (iov_iter_is_bvec(i: &con->v2.in_iter)) { |
1936 | if (ceph_test_opt(from_msgr(con->msgr), RXBOUNCE)) { |
1937 | con->in_data_crc = crc32c(crc: con->in_data_crc, |
1938 | page_address(con->bounce_page), |
1939 | length: con->v2.in_bvec.bv_len); |
1940 | get_bvec_at(cursor, bv: &bv); |
1941 | memcpy_to_page(page: bv.bv_page, offset: bv.bv_offset, |
1942 | page_address(con->bounce_page), |
1943 | len: con->v2.in_bvec.bv_len); |
1944 | } else { |
1945 | con->in_data_crc = ceph_crc32c_page(crc: con->in_data_crc, |
1946 | page: con->v2.in_bvec.bv_page, |
1947 | page_offset: con->v2.in_bvec.bv_offset, |
1948 | length: con->v2.in_bvec.bv_len); |
1949 | } |
1950 | |
1951 | ceph_msg_data_advance(cursor, bytes: con->v2.in_bvec.bv_len); |
1952 | cursor->sr_resid -= con->v2.in_bvec.bv_len; |
1953 | dout("%s: advance by 0x%x sr_resid 0x%x\n" , __func__, |
1954 | con->v2.in_bvec.bv_len, cursor->sr_resid); |
1955 | WARN_ON_ONCE(cursor->sr_resid > cursor->total_resid); |
1956 | if (cursor->sr_resid) { |
1957 | get_bvec_at(cursor, bv: &bv); |
1958 | if (bv.bv_len > cursor->sr_resid) |
1959 | bv.bv_len = cursor->sr_resid; |
1960 | if (ceph_test_opt(from_msgr(con->msgr), RXBOUNCE)) { |
1961 | bv.bv_page = con->bounce_page; |
1962 | bv.bv_offset = 0; |
1963 | } |
1964 | set_in_bvec(con, bv: &bv); |
1965 | con->v2.data_len_remain -= bv.bv_len; |
1966 | return 0; |
1967 | } |
1968 | } else if (iov_iter_is_kvec(i: &con->v2.in_iter)) { |
1969 | /* On first call, we have no kvec so don't compute crc */ |
1970 | if (con->v2.in_kvec_cnt) { |
1971 | WARN_ON_ONCE(con->v2.in_kvec_cnt > 1); |
1972 | con->in_data_crc = crc32c(crc: con->in_data_crc, |
1973 | address: con->v2.in_kvecs[0].iov_base, |
1974 | length: con->v2.in_kvecs[0].iov_len); |
1975 | } |
1976 | } else { |
1977 | return -EIO; |
1978 | } |
1979 | |
1980 | /* get next extent */ |
1981 | ret = con->ops->sparse_read(con, cursor, &buf); |
1982 | if (ret <= 0) { |
1983 | if (ret < 0) |
1984 | return ret; |
1985 | |
1986 | reset_in_kvecs(con); |
1987 | add_in_kvec(con, buf: con->v2.in_buf, CEPH_EPILOGUE_PLAIN_LEN); |
1988 | con->v2.in_state = IN_S_HANDLE_EPILOGUE; |
1989 | return 0; |
1990 | } |
1991 | |
1992 | if (buf) { |
1993 | /* receive into buffer */ |
1994 | reset_in_kvecs(con); |
1995 | add_in_kvec(con, buf, len: ret); |
1996 | con->v2.data_len_remain -= ret; |
1997 | return 0; |
1998 | } |
1999 | |
2000 | if (ret > cursor->total_resid) { |
2001 | pr_warn("%s: ret 0x%x total_resid 0x%zx resid 0x%zx\n" , |
2002 | __func__, ret, cursor->total_resid, cursor->resid); |
2003 | return -EIO; |
2004 | } |
2005 | get_bvec_at(cursor, bv: &bv); |
2006 | if (bv.bv_len > cursor->sr_resid) |
2007 | bv.bv_len = cursor->sr_resid; |
2008 | if (ceph_test_opt(from_msgr(con->msgr), RXBOUNCE)) { |
2009 | if (unlikely(!con->bounce_page)) { |
2010 | con->bounce_page = alloc_page(GFP_NOIO); |
2011 | if (!con->bounce_page) { |
2012 | pr_err("failed to allocate bounce page\n" ); |
2013 | return -ENOMEM; |
2014 | } |
2015 | } |
2016 | |
2017 | bv.bv_page = con->bounce_page; |
2018 | bv.bv_offset = 0; |
2019 | } |
2020 | set_in_bvec(con, bv: &bv); |
2021 | con->v2.data_len_remain -= ret; |
2022 | return ret; |
2023 | } |
2024 | |
2025 | static int prepare_sparse_read_data(struct ceph_connection *con) |
2026 | { |
2027 | struct ceph_msg *msg = con->in_msg; |
2028 | |
2029 | dout("%s: starting sparse read\n" , __func__); |
2030 | |
2031 | if (WARN_ON_ONCE(!con->ops->sparse_read)) |
2032 | return -EOPNOTSUPP; |
2033 | |
2034 | if (!con_secure(con)) |
2035 | con->in_data_crc = -1; |
2036 | |
2037 | ceph_msg_data_cursor_init(cursor: &con->v2.in_cursor, msg, |
2038 | length: msg->sparse_read_total); |
2039 | |
2040 | reset_in_kvecs(con); |
2041 | con->v2.in_state = IN_S_PREPARE_SPARSE_DATA_CONT; |
2042 | con->v2.data_len_remain = data_len(msg); |
2043 | return prepare_sparse_read_cont(con); |
2044 | } |
2045 | |
2046 | static int prepare_read_tail_plain(struct ceph_connection *con) |
2047 | { |
2048 | struct ceph_msg *msg = con->in_msg; |
2049 | |
2050 | if (!front_len(msg) && !middle_len(msg)) { |
2051 | WARN_ON(!data_len(msg)); |
2052 | return prepare_read_data(con); |
2053 | } |
2054 | |
2055 | reset_in_kvecs(con); |
2056 | if (front_len(msg)) { |
2057 | add_in_kvec(con, buf: msg->front.iov_base, len: front_len(msg)); |
2058 | WARN_ON(msg->front.iov_len != front_len(msg)); |
2059 | } |
2060 | if (middle_len(msg)) { |
2061 | add_in_kvec(con, buf: msg->middle->vec.iov_base, len: middle_len(msg)); |
2062 | WARN_ON(msg->middle->vec.iov_len != middle_len(msg)); |
2063 | } |
2064 | |
2065 | if (data_len(msg)) { |
2066 | if (msg->sparse_read_total) |
2067 | con->v2.in_state = IN_S_PREPARE_SPARSE_DATA; |
2068 | else |
2069 | con->v2.in_state = IN_S_PREPARE_READ_DATA; |
2070 | } else { |
2071 | add_in_kvec(con, buf: con->v2.in_buf, CEPH_EPILOGUE_PLAIN_LEN); |
2072 | con->v2.in_state = IN_S_HANDLE_EPILOGUE; |
2073 | } |
2074 | return 0; |
2075 | } |
2076 | |
2077 | static void prepare_read_enc_page(struct ceph_connection *con) |
2078 | { |
2079 | struct bio_vec bv; |
2080 | |
2081 | dout("%s con %p i %d resid %d\n" , __func__, con, con->v2.in_enc_i, |
2082 | con->v2.in_enc_resid); |
2083 | WARN_ON(!con->v2.in_enc_resid); |
2084 | |
2085 | bvec_set_page(bv: &bv, page: con->v2.in_enc_pages[con->v2.in_enc_i], |
2086 | min(con->v2.in_enc_resid, (int)PAGE_SIZE), offset: 0); |
2087 | |
2088 | set_in_bvec(con, bv: &bv); |
2089 | con->v2.in_enc_i++; |
2090 | con->v2.in_enc_resid -= bv.bv_len; |
2091 | |
2092 | if (con->v2.in_enc_resid) { |
2093 | con->v2.in_state = IN_S_PREPARE_READ_ENC_PAGE; |
2094 | return; |
2095 | } |
2096 | |
2097 | /* |
2098 | * We are set to read the last piece of ciphertext (ending |
2099 | * with epilogue) + auth tag. |
2100 | */ |
2101 | WARN_ON(con->v2.in_enc_i != con->v2.in_enc_page_cnt); |
2102 | con->v2.in_state = IN_S_HANDLE_EPILOGUE; |
2103 | } |
2104 | |
2105 | static int prepare_read_tail_secure(struct ceph_connection *con) |
2106 | { |
2107 | struct page **enc_pages; |
2108 | int enc_page_cnt; |
2109 | int tail_len; |
2110 | |
2111 | tail_len = tail_onwire_len(msg: con->in_msg, secure: true); |
2112 | WARN_ON(!tail_len); |
2113 | |
2114 | enc_page_cnt = calc_pages_for(off: 0, len: tail_len); |
2115 | enc_pages = ceph_alloc_page_vector(num_pages: enc_page_cnt, GFP_NOIO); |
2116 | if (IS_ERR(ptr: enc_pages)) |
2117 | return PTR_ERR(ptr: enc_pages); |
2118 | |
2119 | WARN_ON(con->v2.in_enc_pages || con->v2.in_enc_page_cnt); |
2120 | con->v2.in_enc_pages = enc_pages; |
2121 | con->v2.in_enc_page_cnt = enc_page_cnt; |
2122 | con->v2.in_enc_resid = tail_len; |
2123 | con->v2.in_enc_i = 0; |
2124 | |
2125 | prepare_read_enc_page(con); |
2126 | return 0; |
2127 | } |
2128 | |
2129 | static void __finish_skip(struct ceph_connection *con) |
2130 | { |
2131 | con->in_seq++; |
2132 | prepare_read_preamble(con); |
2133 | } |
2134 | |
2135 | static void prepare_skip_message(struct ceph_connection *con) |
2136 | { |
2137 | struct ceph_frame_desc *desc = &con->v2.in_desc; |
2138 | int tail_len; |
2139 | |
2140 | dout("%s con %p %d+%d+%d\n" , __func__, con, desc->fd_lens[1], |
2141 | desc->fd_lens[2], desc->fd_lens[3]); |
2142 | |
2143 | tail_len = __tail_onwire_len(front_len: desc->fd_lens[1], middle_len: desc->fd_lens[2], |
2144 | data_len: desc->fd_lens[3], secure: con_secure(con)); |
2145 | if (!tail_len) { |
2146 | __finish_skip(con); |
2147 | } else { |
2148 | set_in_skip(con, len: tail_len); |
2149 | con->v2.in_state = IN_S_FINISH_SKIP; |
2150 | } |
2151 | } |
2152 | |
2153 | static int process_banner_prefix(struct ceph_connection *con) |
2154 | { |
2155 | int payload_len; |
2156 | void *p; |
2157 | |
2158 | WARN_ON(con->v2.in_kvecs[0].iov_len != CEPH_BANNER_V2_PREFIX_LEN); |
2159 | |
2160 | p = con->v2.in_kvecs[0].iov_base; |
2161 | if (memcmp(p, CEPH_BANNER_V2, CEPH_BANNER_V2_LEN)) { |
2162 | if (!memcmp(p, CEPH_BANNER, CEPH_BANNER_LEN)) |
2163 | con->error_msg = "server is speaking msgr1 protocol" ; |
2164 | else |
2165 | con->error_msg = "protocol error, bad banner" ; |
2166 | return -EINVAL; |
2167 | } |
2168 | |
2169 | p += CEPH_BANNER_V2_LEN; |
2170 | payload_len = ceph_decode_16(p: &p); |
2171 | dout("%s con %p payload_len %d\n" , __func__, con, payload_len); |
2172 | |
2173 | return prepare_read_banner_payload(con, payload_len); |
2174 | } |
2175 | |
2176 | static int process_banner_payload(struct ceph_connection *con) |
2177 | { |
2178 | void *end = con->v2.in_kvecs[0].iov_base + con->v2.in_kvecs[0].iov_len; |
2179 | u64 feat = CEPH_MSGR2_SUPPORTED_FEATURES; |
2180 | u64 req_feat = CEPH_MSGR2_REQUIRED_FEATURES; |
2181 | u64 server_feat, server_req_feat; |
2182 | void *p; |
2183 | int ret; |
2184 | |
2185 | p = con->v2.in_kvecs[0].iov_base; |
2186 | ceph_decode_64_safe(&p, end, server_feat, bad); |
2187 | ceph_decode_64_safe(&p, end, server_req_feat, bad); |
2188 | |
2189 | dout("%s con %p server_feat 0x%llx server_req_feat 0x%llx\n" , |
2190 | __func__, con, server_feat, server_req_feat); |
2191 | |
2192 | if (req_feat & ~server_feat) { |
2193 | pr_err("msgr2 feature set mismatch: my required > server's supported 0x%llx, need 0x%llx\n" , |
2194 | server_feat, req_feat & ~server_feat); |
2195 | con->error_msg = "missing required protocol features" ; |
2196 | return -EINVAL; |
2197 | } |
2198 | if (server_req_feat & ~feat) { |
2199 | pr_err("msgr2 feature set mismatch: server's required > my supported 0x%llx, missing 0x%llx\n" , |
2200 | feat, server_req_feat & ~feat); |
2201 | con->error_msg = "missing required protocol features" ; |
2202 | return -EINVAL; |
2203 | } |
2204 | |
2205 | /* no reset_out_kvecs() as our banner may still be pending */ |
2206 | ret = prepare_hello(con); |
2207 | if (ret) { |
2208 | pr_err("prepare_hello failed: %d\n" , ret); |
2209 | return ret; |
2210 | } |
2211 | |
2212 | con->state = CEPH_CON_S_V2_HELLO; |
2213 | prepare_read_preamble(con); |
2214 | return 0; |
2215 | |
2216 | bad: |
2217 | pr_err("failed to decode banner payload\n" ); |
2218 | return -EINVAL; |
2219 | } |
2220 | |
2221 | static int process_hello(struct ceph_connection *con, void *p, void *end) |
2222 | { |
2223 | struct ceph_entity_addr *my_addr = &con->msgr->inst.addr; |
2224 | struct ceph_entity_addr addr_for_me; |
2225 | u8 entity_type; |
2226 | int ret; |
2227 | |
2228 | if (con->state != CEPH_CON_S_V2_HELLO) { |
2229 | con->error_msg = "protocol error, unexpected hello" ; |
2230 | return -EINVAL; |
2231 | } |
2232 | |
2233 | ceph_decode_8_safe(&p, end, entity_type, bad); |
2234 | ret = ceph_decode_entity_addr(p: &p, end, addr: &addr_for_me); |
2235 | if (ret) { |
2236 | pr_err("failed to decode addr_for_me: %d\n" , ret); |
2237 | return ret; |
2238 | } |
2239 | |
2240 | dout("%s con %p entity_type %d addr_for_me %s\n" , __func__, con, |
2241 | entity_type, ceph_pr_addr(&addr_for_me)); |
2242 | |
2243 | if (entity_type != con->peer_name.type) { |
2244 | pr_err("bad peer type, want %d, got %d\n" , |
2245 | con->peer_name.type, entity_type); |
2246 | con->error_msg = "wrong peer at address" ; |
2247 | return -EINVAL; |
2248 | } |
2249 | |
2250 | /* |
2251 | * Set our address to the address our first peer (i.e. monitor) |
2252 | * sees that we are connecting from. If we are behind some sort |
2253 | * of NAT and want to be identified by some private (not NATed) |
2254 | * address, ip option should be used. |
2255 | */ |
2256 | if (ceph_addr_is_blank(addr: my_addr)) { |
2257 | memcpy(&my_addr->in_addr, &addr_for_me.in_addr, |
2258 | sizeof(my_addr->in_addr)); |
2259 | ceph_addr_set_port(addr: my_addr, p: 0); |
2260 | dout("%s con %p set my addr %s, as seen by peer %s\n" , |
2261 | __func__, con, ceph_pr_addr(my_addr), |
2262 | ceph_pr_addr(&con->peer_addr)); |
2263 | } else { |
2264 | dout("%s con %p my addr already set %s\n" , |
2265 | __func__, con, ceph_pr_addr(my_addr)); |
2266 | } |
2267 | |
2268 | WARN_ON(ceph_addr_is_blank(my_addr) || ceph_addr_port(my_addr)); |
2269 | WARN_ON(my_addr->type != CEPH_ENTITY_ADDR_TYPE_ANY); |
2270 | WARN_ON(!my_addr->nonce); |
2271 | |
2272 | /* no reset_out_kvecs() as our hello may still be pending */ |
2273 | ret = prepare_auth_request(con); |
2274 | if (ret) { |
2275 | if (ret != -EAGAIN) |
2276 | pr_err("prepare_auth_request failed: %d\n" , ret); |
2277 | return ret; |
2278 | } |
2279 | |
2280 | con->state = CEPH_CON_S_V2_AUTH; |
2281 | return 0; |
2282 | |
2283 | bad: |
2284 | pr_err("failed to decode hello\n" ); |
2285 | return -EINVAL; |
2286 | } |
2287 | |
2288 | static int process_auth_bad_method(struct ceph_connection *con, |
2289 | void *p, void *end) |
2290 | { |
2291 | int allowed_protos[8], allowed_modes[8]; |
2292 | int allowed_proto_cnt, allowed_mode_cnt; |
2293 | int used_proto, result; |
2294 | int ret; |
2295 | int i; |
2296 | |
2297 | if (con->state != CEPH_CON_S_V2_AUTH) { |
2298 | con->error_msg = "protocol error, unexpected auth_bad_method" ; |
2299 | return -EINVAL; |
2300 | } |
2301 | |
2302 | ceph_decode_32_safe(&p, end, used_proto, bad); |
2303 | ceph_decode_32_safe(&p, end, result, bad); |
2304 | dout("%s con %p used_proto %d result %d\n" , __func__, con, used_proto, |
2305 | result); |
2306 | |
2307 | ceph_decode_32_safe(&p, end, allowed_proto_cnt, bad); |
2308 | if (allowed_proto_cnt > ARRAY_SIZE(allowed_protos)) { |
2309 | pr_err("allowed_protos too big %d\n" , allowed_proto_cnt); |
2310 | return -EINVAL; |
2311 | } |
2312 | for (i = 0; i < allowed_proto_cnt; i++) { |
2313 | ceph_decode_32_safe(&p, end, allowed_protos[i], bad); |
2314 | dout("%s con %p allowed_protos[%d] %d\n" , __func__, con, |
2315 | i, allowed_protos[i]); |
2316 | } |
2317 | |
2318 | ceph_decode_32_safe(&p, end, allowed_mode_cnt, bad); |
2319 | if (allowed_mode_cnt > ARRAY_SIZE(allowed_modes)) { |
2320 | pr_err("allowed_modes too big %d\n" , allowed_mode_cnt); |
2321 | return -EINVAL; |
2322 | } |
2323 | for (i = 0; i < allowed_mode_cnt; i++) { |
2324 | ceph_decode_32_safe(&p, end, allowed_modes[i], bad); |
2325 | dout("%s con %p allowed_modes[%d] %d\n" , __func__, con, |
2326 | i, allowed_modes[i]); |
2327 | } |
2328 | |
2329 | mutex_unlock(lock: &con->mutex); |
2330 | ret = con->ops->handle_auth_bad_method(con, used_proto, result, |
2331 | allowed_protos, |
2332 | allowed_proto_cnt, |
2333 | allowed_modes, |
2334 | allowed_mode_cnt); |
2335 | mutex_lock(&con->mutex); |
2336 | if (con->state != CEPH_CON_S_V2_AUTH) { |
2337 | dout("%s con %p state changed to %d\n" , __func__, con, |
2338 | con->state); |
2339 | return -EAGAIN; |
2340 | } |
2341 | |
2342 | dout("%s con %p handle_auth_bad_method ret %d\n" , __func__, con, ret); |
2343 | return ret; |
2344 | |
2345 | bad: |
2346 | pr_err("failed to decode auth_bad_method\n" ); |
2347 | return -EINVAL; |
2348 | } |
2349 | |
2350 | static int process_auth_reply_more(struct ceph_connection *con, |
2351 | void *p, void *end) |
2352 | { |
2353 | int payload_len; |
2354 | int ret; |
2355 | |
2356 | if (con->state != CEPH_CON_S_V2_AUTH) { |
2357 | con->error_msg = "protocol error, unexpected auth_reply_more" ; |
2358 | return -EINVAL; |
2359 | } |
2360 | |
2361 | ceph_decode_32_safe(&p, end, payload_len, bad); |
2362 | ceph_decode_need(&p, end, payload_len, bad); |
2363 | |
2364 | dout("%s con %p payload_len %d\n" , __func__, con, payload_len); |
2365 | |
2366 | reset_out_kvecs(con); |
2367 | ret = prepare_auth_request_more(con, reply: p, reply_len: payload_len); |
2368 | if (ret) { |
2369 | if (ret != -EAGAIN) |
2370 | pr_err("prepare_auth_request_more failed: %d\n" , ret); |
2371 | return ret; |
2372 | } |
2373 | |
2374 | return 0; |
2375 | |
2376 | bad: |
2377 | pr_err("failed to decode auth_reply_more\n" ); |
2378 | return -EINVAL; |
2379 | } |
2380 | |
2381 | /* |
2382 | * Align session_key and con_secret to avoid GFP_ATOMIC allocation |
2383 | * inside crypto_shash_setkey() and crypto_aead_setkey() called from |
2384 | * setup_crypto(). __aligned(16) isn't guaranteed to work for stack |
2385 | * objects, so do it by hand. |
2386 | */ |
2387 | static int process_auth_done(struct ceph_connection *con, void *p, void *end) |
2388 | { |
2389 | u8 session_key_buf[CEPH_KEY_LEN + 16]; |
2390 | u8 con_secret_buf[CEPH_MAX_CON_SECRET_LEN + 16]; |
2391 | u8 *session_key = PTR_ALIGN(&session_key_buf[0], 16); |
2392 | u8 *con_secret = PTR_ALIGN(&con_secret_buf[0], 16); |
2393 | int session_key_len, con_secret_len; |
2394 | int payload_len; |
2395 | u64 global_id; |
2396 | int ret; |
2397 | |
2398 | if (con->state != CEPH_CON_S_V2_AUTH) { |
2399 | con->error_msg = "protocol error, unexpected auth_done" ; |
2400 | return -EINVAL; |
2401 | } |
2402 | |
2403 | ceph_decode_64_safe(&p, end, global_id, bad); |
2404 | ceph_decode_32_safe(&p, end, con->v2.con_mode, bad); |
2405 | ceph_decode_32_safe(&p, end, payload_len, bad); |
2406 | |
2407 | dout("%s con %p global_id %llu con_mode %d payload_len %d\n" , |
2408 | __func__, con, global_id, con->v2.con_mode, payload_len); |
2409 | |
2410 | mutex_unlock(lock: &con->mutex); |
2411 | session_key_len = 0; |
2412 | con_secret_len = 0; |
2413 | ret = con->ops->handle_auth_done(con, global_id, p, payload_len, |
2414 | session_key, &session_key_len, |
2415 | con_secret, &con_secret_len); |
2416 | mutex_lock(&con->mutex); |
2417 | if (con->state != CEPH_CON_S_V2_AUTH) { |
2418 | dout("%s con %p state changed to %d\n" , __func__, con, |
2419 | con->state); |
2420 | ret = -EAGAIN; |
2421 | goto out; |
2422 | } |
2423 | |
2424 | dout("%s con %p handle_auth_done ret %d\n" , __func__, con, ret); |
2425 | if (ret) |
2426 | goto out; |
2427 | |
2428 | ret = setup_crypto(con, session_key, session_key_len, con_secret, |
2429 | con_secret_len); |
2430 | if (ret) |
2431 | goto out; |
2432 | |
2433 | reset_out_kvecs(con); |
2434 | ret = prepare_auth_signature(con); |
2435 | if (ret) { |
2436 | pr_err("prepare_auth_signature failed: %d\n" , ret); |
2437 | goto out; |
2438 | } |
2439 | |
2440 | con->state = CEPH_CON_S_V2_AUTH_SIGNATURE; |
2441 | |
2442 | out: |
2443 | memzero_explicit(s: session_key_buf, count: sizeof(session_key_buf)); |
2444 | memzero_explicit(s: con_secret_buf, count: sizeof(con_secret_buf)); |
2445 | return ret; |
2446 | |
2447 | bad: |
2448 | pr_err("failed to decode auth_done\n" ); |
2449 | return -EINVAL; |
2450 | } |
2451 | |
2452 | static int process_auth_signature(struct ceph_connection *con, |
2453 | void *p, void *end) |
2454 | { |
2455 | u8 hmac[SHA256_DIGEST_SIZE]; |
2456 | int ret; |
2457 | |
2458 | if (con->state != CEPH_CON_S_V2_AUTH_SIGNATURE) { |
2459 | con->error_msg = "protocol error, unexpected auth_signature" ; |
2460 | return -EINVAL; |
2461 | } |
2462 | |
2463 | ret = hmac_sha256(con, kvecs: con->v2.out_sign_kvecs, |
2464 | kvec_cnt: con->v2.out_sign_kvec_cnt, hmac); |
2465 | if (ret) |
2466 | return ret; |
2467 | |
2468 | ceph_decode_need(&p, end, SHA256_DIGEST_SIZE, bad); |
2469 | if (crypto_memneq(a: p, b: hmac, SHA256_DIGEST_SIZE)) { |
2470 | con->error_msg = "integrity error, bad auth signature" ; |
2471 | return -EBADMSG; |
2472 | } |
2473 | |
2474 | dout("%s con %p auth signature ok\n" , __func__, con); |
2475 | |
2476 | /* no reset_out_kvecs() as our auth_signature may still be pending */ |
2477 | if (!con->v2.server_cookie) { |
2478 | ret = prepare_client_ident(con); |
2479 | if (ret) { |
2480 | pr_err("prepare_client_ident failed: %d\n" , ret); |
2481 | return ret; |
2482 | } |
2483 | |
2484 | con->state = CEPH_CON_S_V2_SESSION_CONNECT; |
2485 | } else { |
2486 | ret = prepare_session_reconnect(con); |
2487 | if (ret) { |
2488 | pr_err("prepare_session_reconnect failed: %d\n" , ret); |
2489 | return ret; |
2490 | } |
2491 | |
2492 | con->state = CEPH_CON_S_V2_SESSION_RECONNECT; |
2493 | } |
2494 | |
2495 | return 0; |
2496 | |
2497 | bad: |
2498 | pr_err("failed to decode auth_signature\n" ); |
2499 | return -EINVAL; |
2500 | } |
2501 | |
2502 | static int process_server_ident(struct ceph_connection *con, |
2503 | void *p, void *end) |
2504 | { |
2505 | struct ceph_client *client = from_msgr(con->msgr); |
2506 | u64 features, required_features; |
2507 | struct ceph_entity_addr addr; |
2508 | u64 global_seq; |
2509 | u64 global_id; |
2510 | u64 cookie; |
2511 | u64 flags; |
2512 | int ret; |
2513 | |
2514 | if (con->state != CEPH_CON_S_V2_SESSION_CONNECT) { |
2515 | con->error_msg = "protocol error, unexpected server_ident" ; |
2516 | return -EINVAL; |
2517 | } |
2518 | |
2519 | ret = ceph_decode_entity_addrvec(p: &p, end, msgr2: true, addr: &addr); |
2520 | if (ret) { |
2521 | pr_err("failed to decode server addrs: %d\n" , ret); |
2522 | return ret; |
2523 | } |
2524 | |
2525 | ceph_decode_64_safe(&p, end, global_id, bad); |
2526 | ceph_decode_64_safe(&p, end, global_seq, bad); |
2527 | ceph_decode_64_safe(&p, end, features, bad); |
2528 | ceph_decode_64_safe(&p, end, required_features, bad); |
2529 | ceph_decode_64_safe(&p, end, flags, bad); |
2530 | ceph_decode_64_safe(&p, end, cookie, bad); |
2531 | |
2532 | 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" , |
2533 | __func__, con, ceph_pr_addr(&addr), le32_to_cpu(addr.nonce), |
2534 | global_id, global_seq, features, required_features, flags, cookie); |
2535 | |
2536 | /* is this who we intended to talk to? */ |
2537 | if (memcmp(p: &addr, q: &con->peer_addr, size: sizeof(con->peer_addr))) { |
2538 | pr_err("bad peer addr/nonce, want %s/%u, got %s/%u\n" , |
2539 | ceph_pr_addr(&con->peer_addr), |
2540 | le32_to_cpu(con->peer_addr.nonce), |
2541 | ceph_pr_addr(&addr), le32_to_cpu(addr.nonce)); |
2542 | con->error_msg = "wrong peer at address" ; |
2543 | return -EINVAL; |
2544 | } |
2545 | |
2546 | if (client->required_features & ~features) { |
2547 | pr_err("RADOS feature set mismatch: my required > server's supported 0x%llx, need 0x%llx\n" , |
2548 | features, client->required_features & ~features); |
2549 | con->error_msg = "missing required protocol features" ; |
2550 | return -EINVAL; |
2551 | } |
2552 | |
2553 | /* |
2554 | * Both name->type and name->num are set in ceph_con_open() but |
2555 | * name->num may be bogus in the initial monmap. name->type is |
2556 | * verified in handle_hello(). |
2557 | */ |
2558 | WARN_ON(!con->peer_name.type); |
2559 | con->peer_name.num = cpu_to_le64(global_id); |
2560 | con->v2.peer_global_seq = global_seq; |
2561 | con->peer_features = features; |
2562 | WARN_ON(required_features & ~client->supported_features); |
2563 | con->v2.server_cookie = cookie; |
2564 | |
2565 | if (flags & CEPH_MSG_CONNECT_LOSSY) { |
2566 | ceph_con_flag_set(con, CEPH_CON_F_LOSSYTX); |
2567 | WARN_ON(con->v2.server_cookie); |
2568 | } else { |
2569 | WARN_ON(!con->v2.server_cookie); |
2570 | } |
2571 | |
2572 | clear_in_sign_kvecs(con); |
2573 | clear_out_sign_kvecs(con); |
2574 | free_conn_bufs(con); |
2575 | con->delay = 0; /* reset backoff memory */ |
2576 | |
2577 | con->state = CEPH_CON_S_OPEN; |
2578 | con->v2.out_state = OUT_S_GET_NEXT; |
2579 | return 0; |
2580 | |
2581 | bad: |
2582 | pr_err("failed to decode server_ident\n" ); |
2583 | return -EINVAL; |
2584 | } |
2585 | |
2586 | static int process_ident_missing_features(struct ceph_connection *con, |
2587 | void *p, void *end) |
2588 | { |
2589 | struct ceph_client *client = from_msgr(con->msgr); |
2590 | u64 missing_features; |
2591 | |
2592 | if (con->state != CEPH_CON_S_V2_SESSION_CONNECT) { |
2593 | con->error_msg = "protocol error, unexpected ident_missing_features" ; |
2594 | return -EINVAL; |
2595 | } |
2596 | |
2597 | ceph_decode_64_safe(&p, end, missing_features, bad); |
2598 | pr_err("RADOS feature set mismatch: server's required > my supported 0x%llx, missing 0x%llx\n" , |
2599 | client->supported_features, missing_features); |
2600 | con->error_msg = "missing required protocol features" ; |
2601 | return -EINVAL; |
2602 | |
2603 | bad: |
2604 | pr_err("failed to decode ident_missing_features\n" ); |
2605 | return -EINVAL; |
2606 | } |
2607 | |
2608 | static int process_session_reconnect_ok(struct ceph_connection *con, |
2609 | void *p, void *end) |
2610 | { |
2611 | u64 seq; |
2612 | |
2613 | if (con->state != CEPH_CON_S_V2_SESSION_RECONNECT) { |
2614 | con->error_msg = "protocol error, unexpected session_reconnect_ok" ; |
2615 | return -EINVAL; |
2616 | } |
2617 | |
2618 | ceph_decode_64_safe(&p, end, seq, bad); |
2619 | |
2620 | dout("%s con %p seq %llu\n" , __func__, con, seq); |
2621 | ceph_con_discard_requeued(con, reconnect_seq: seq); |
2622 | |
2623 | clear_in_sign_kvecs(con); |
2624 | clear_out_sign_kvecs(con); |
2625 | free_conn_bufs(con); |
2626 | con->delay = 0; /* reset backoff memory */ |
2627 | |
2628 | con->state = CEPH_CON_S_OPEN; |
2629 | con->v2.out_state = OUT_S_GET_NEXT; |
2630 | return 0; |
2631 | |
2632 | bad: |
2633 | pr_err("failed to decode session_reconnect_ok\n" ); |
2634 | return -EINVAL; |
2635 | } |
2636 | |
2637 | static int process_session_retry(struct ceph_connection *con, |
2638 | void *p, void *end) |
2639 | { |
2640 | u64 connect_seq; |
2641 | int ret; |
2642 | |
2643 | if (con->state != CEPH_CON_S_V2_SESSION_RECONNECT) { |
2644 | con->error_msg = "protocol error, unexpected session_retry" ; |
2645 | return -EINVAL; |
2646 | } |
2647 | |
2648 | ceph_decode_64_safe(&p, end, connect_seq, bad); |
2649 | |
2650 | dout("%s con %p connect_seq %llu\n" , __func__, con, connect_seq); |
2651 | WARN_ON(connect_seq <= con->v2.connect_seq); |
2652 | con->v2.connect_seq = connect_seq + 1; |
2653 | |
2654 | free_conn_bufs(con); |
2655 | |
2656 | reset_out_kvecs(con); |
2657 | ret = prepare_session_reconnect(con); |
2658 | if (ret) { |
2659 | pr_err("prepare_session_reconnect (cseq) failed: %d\n" , ret); |
2660 | return ret; |
2661 | } |
2662 | |
2663 | return 0; |
2664 | |
2665 | bad: |
2666 | pr_err("failed to decode session_retry\n" ); |
2667 | return -EINVAL; |
2668 | } |
2669 | |
2670 | static int process_session_retry_global(struct ceph_connection *con, |
2671 | void *p, void *end) |
2672 | { |
2673 | u64 global_seq; |
2674 | int ret; |
2675 | |
2676 | if (con->state != CEPH_CON_S_V2_SESSION_RECONNECT) { |
2677 | con->error_msg = "protocol error, unexpected session_retry_global" ; |
2678 | return -EINVAL; |
2679 | } |
2680 | |
2681 | ceph_decode_64_safe(&p, end, global_seq, bad); |
2682 | |
2683 | dout("%s con %p global_seq %llu\n" , __func__, con, global_seq); |
2684 | WARN_ON(global_seq <= con->v2.global_seq); |
2685 | con->v2.global_seq = ceph_get_global_seq(msgr: con->msgr, gt: global_seq); |
2686 | |
2687 | free_conn_bufs(con); |
2688 | |
2689 | reset_out_kvecs(con); |
2690 | ret = prepare_session_reconnect(con); |
2691 | if (ret) { |
2692 | pr_err("prepare_session_reconnect (gseq) failed: %d\n" , ret); |
2693 | return ret; |
2694 | } |
2695 | |
2696 | return 0; |
2697 | |
2698 | bad: |
2699 | pr_err("failed to decode session_retry_global\n" ); |
2700 | return -EINVAL; |
2701 | } |
2702 | |
2703 | static int process_session_reset(struct ceph_connection *con, |
2704 | void *p, void *end) |
2705 | { |
2706 | bool full; |
2707 | int ret; |
2708 | |
2709 | if (con->state != CEPH_CON_S_V2_SESSION_RECONNECT) { |
2710 | con->error_msg = "protocol error, unexpected session_reset" ; |
2711 | return -EINVAL; |
2712 | } |
2713 | |
2714 | ceph_decode_8_safe(&p, end, full, bad); |
2715 | if (!full) { |
2716 | con->error_msg = "protocol error, bad session_reset" ; |
2717 | return -EINVAL; |
2718 | } |
2719 | |
2720 | pr_info("%s%lld %s session reset\n" , ENTITY_NAME(con->peer_name), |
2721 | ceph_pr_addr(&con->peer_addr)); |
2722 | ceph_con_reset_session(con); |
2723 | |
2724 | mutex_unlock(lock: &con->mutex); |
2725 | if (con->ops->peer_reset) |
2726 | con->ops->peer_reset(con); |
2727 | mutex_lock(&con->mutex); |
2728 | if (con->state != CEPH_CON_S_V2_SESSION_RECONNECT) { |
2729 | dout("%s con %p state changed to %d\n" , __func__, con, |
2730 | con->state); |
2731 | return -EAGAIN; |
2732 | } |
2733 | |
2734 | free_conn_bufs(con); |
2735 | |
2736 | reset_out_kvecs(con); |
2737 | ret = prepare_client_ident(con); |
2738 | if (ret) { |
2739 | pr_err("prepare_client_ident (rst) failed: %d\n" , ret); |
2740 | return ret; |
2741 | } |
2742 | |
2743 | con->state = CEPH_CON_S_V2_SESSION_CONNECT; |
2744 | return 0; |
2745 | |
2746 | bad: |
2747 | pr_err("failed to decode session_reset\n" ); |
2748 | return -EINVAL; |
2749 | } |
2750 | |
2751 | static int process_keepalive2_ack(struct ceph_connection *con, |
2752 | void *p, void *end) |
2753 | { |
2754 | if (con->state != CEPH_CON_S_OPEN) { |
2755 | con->error_msg = "protocol error, unexpected keepalive2_ack" ; |
2756 | return -EINVAL; |
2757 | } |
2758 | |
2759 | ceph_decode_need(&p, end, sizeof(struct ceph_timespec), bad); |
2760 | ceph_decode_timespec64(ts: &con->last_keepalive_ack, tv: p); |
2761 | |
2762 | dout("%s con %p timestamp %lld.%09ld\n" , __func__, con, |
2763 | con->last_keepalive_ack.tv_sec, con->last_keepalive_ack.tv_nsec); |
2764 | |
2765 | return 0; |
2766 | |
2767 | bad: |
2768 | pr_err("failed to decode keepalive2_ack\n" ); |
2769 | return -EINVAL; |
2770 | } |
2771 | |
2772 | static int process_ack(struct ceph_connection *con, void *p, void *end) |
2773 | { |
2774 | u64 seq; |
2775 | |
2776 | if (con->state != CEPH_CON_S_OPEN) { |
2777 | con->error_msg = "protocol error, unexpected ack" ; |
2778 | return -EINVAL; |
2779 | } |
2780 | |
2781 | ceph_decode_64_safe(&p, end, seq, bad); |
2782 | |
2783 | dout("%s con %p seq %llu\n" , __func__, con, seq); |
2784 | ceph_con_discard_sent(con, ack_seq: seq); |
2785 | return 0; |
2786 | |
2787 | bad: |
2788 | pr_err("failed to decode ack\n" ); |
2789 | return -EINVAL; |
2790 | } |
2791 | |
2792 | static int process_control(struct ceph_connection *con, void *p, void *end) |
2793 | { |
2794 | int tag = con->v2.in_desc.fd_tag; |
2795 | int ret; |
2796 | |
2797 | dout("%s con %p tag %d len %d\n" , __func__, con, tag, (int)(end - p)); |
2798 | |
2799 | switch (tag) { |
2800 | case FRAME_TAG_HELLO: |
2801 | ret = process_hello(con, p, end); |
2802 | break; |
2803 | case FRAME_TAG_AUTH_BAD_METHOD: |
2804 | ret = process_auth_bad_method(con, p, end); |
2805 | break; |
2806 | case FRAME_TAG_AUTH_REPLY_MORE: |
2807 | ret = process_auth_reply_more(con, p, end); |
2808 | break; |
2809 | case FRAME_TAG_AUTH_DONE: |
2810 | ret = process_auth_done(con, p, end); |
2811 | break; |
2812 | case FRAME_TAG_AUTH_SIGNATURE: |
2813 | ret = process_auth_signature(con, p, end); |
2814 | break; |
2815 | case FRAME_TAG_SERVER_IDENT: |
2816 | ret = process_server_ident(con, p, end); |
2817 | break; |
2818 | case FRAME_TAG_IDENT_MISSING_FEATURES: |
2819 | ret = process_ident_missing_features(con, p, end); |
2820 | break; |
2821 | case FRAME_TAG_SESSION_RECONNECT_OK: |
2822 | ret = process_session_reconnect_ok(con, p, end); |
2823 | break; |
2824 | case FRAME_TAG_SESSION_RETRY: |
2825 | ret = process_session_retry(con, p, end); |
2826 | break; |
2827 | case FRAME_TAG_SESSION_RETRY_GLOBAL: |
2828 | ret = process_session_retry_global(con, p, end); |
2829 | break; |
2830 | case FRAME_TAG_SESSION_RESET: |
2831 | ret = process_session_reset(con, p, end); |
2832 | break; |
2833 | case FRAME_TAG_KEEPALIVE2_ACK: |
2834 | ret = process_keepalive2_ack(con, p, end); |
2835 | break; |
2836 | case FRAME_TAG_ACK: |
2837 | ret = process_ack(con, p, end); |
2838 | break; |
2839 | default: |
2840 | pr_err("bad tag %d\n" , tag); |
2841 | con->error_msg = "protocol error, bad tag" ; |
2842 | return -EINVAL; |
2843 | } |
2844 | if (ret) { |
2845 | dout("%s con %p error %d\n" , __func__, con, ret); |
2846 | return ret; |
2847 | } |
2848 | |
2849 | prepare_read_preamble(con); |
2850 | return 0; |
2851 | } |
2852 | |
2853 | /* |
2854 | * Return: |
2855 | * 1 - con->in_msg set, read message |
2856 | * 0 - skip message |
2857 | * <0 - error |
2858 | */ |
2859 | static int (struct ceph_connection *con, |
2860 | void *p, void *end) |
2861 | { |
2862 | struct ceph_frame_desc *desc = &con->v2.in_desc; |
2863 | struct ceph_msg_header2 *hdr2 = p; |
2864 | struct ceph_msg_header hdr; |
2865 | int skip; |
2866 | int ret; |
2867 | u64 seq; |
2868 | |
2869 | /* verify seq# */ |
2870 | seq = le64_to_cpu(hdr2->seq); |
2871 | if ((s64)seq - (s64)con->in_seq < 1) { |
2872 | pr_info("%s%lld %s skipping old message: seq %llu, expected %llu\n" , |
2873 | ENTITY_NAME(con->peer_name), |
2874 | ceph_pr_addr(&con->peer_addr), |
2875 | seq, con->in_seq + 1); |
2876 | return 0; |
2877 | } |
2878 | if ((s64)seq - (s64)con->in_seq > 1) { |
2879 | pr_err("bad seq %llu, expected %llu\n" , seq, con->in_seq + 1); |
2880 | con->error_msg = "bad message sequence # for incoming message" ; |
2881 | return -EBADE; |
2882 | } |
2883 | |
2884 | ceph_con_discard_sent(con, le64_to_cpu(hdr2->ack_seq)); |
2885 | |
2886 | fill_header(hdr: &hdr, hdr2, front_len: desc->fd_lens[1], middle_len: desc->fd_lens[2], |
2887 | data_len: desc->fd_lens[3], peer_name: &con->peer_name); |
2888 | ret = ceph_con_in_msg_alloc(con, hdr: &hdr, skip: &skip); |
2889 | if (ret) |
2890 | return ret; |
2891 | |
2892 | WARN_ON(!con->in_msg ^ skip); |
2893 | if (skip) |
2894 | return 0; |
2895 | |
2896 | WARN_ON(!con->in_msg); |
2897 | WARN_ON(con->in_msg->con != con); |
2898 | return 1; |
2899 | } |
2900 | |
2901 | static int process_message(struct ceph_connection *con) |
2902 | { |
2903 | ceph_con_process_message(con); |
2904 | |
2905 | /* |
2906 | * We could have been closed by ceph_con_close() because |
2907 | * ceph_con_process_message() temporarily drops con->mutex. |
2908 | */ |
2909 | if (con->state != CEPH_CON_S_OPEN) { |
2910 | dout("%s con %p state changed to %d\n" , __func__, con, |
2911 | con->state); |
2912 | return -EAGAIN; |
2913 | } |
2914 | |
2915 | prepare_read_preamble(con); |
2916 | return 0; |
2917 | } |
2918 | |
2919 | static int __handle_control(struct ceph_connection *con, void *p) |
2920 | { |
2921 | void *end = p + con->v2.in_desc.fd_lens[0]; |
2922 | struct ceph_msg *msg; |
2923 | int ret; |
2924 | |
2925 | if (con->v2.in_desc.fd_tag != FRAME_TAG_MESSAGE) |
2926 | return process_control(con, p, end); |
2927 | |
2928 | ret = process_message_header(con, p, end); |
2929 | if (ret < 0) |
2930 | return ret; |
2931 | if (ret == 0) { |
2932 | prepare_skip_message(con); |
2933 | return 0; |
2934 | } |
2935 | |
2936 | msg = con->in_msg; /* set in process_message_header() */ |
2937 | if (front_len(msg)) { |
2938 | WARN_ON(front_len(msg) > msg->front_alloc_len); |
2939 | msg->front.iov_len = front_len(msg); |
2940 | } else { |
2941 | msg->front.iov_len = 0; |
2942 | } |
2943 | if (middle_len(msg)) { |
2944 | WARN_ON(middle_len(msg) > msg->middle->alloc_len); |
2945 | msg->middle->vec.iov_len = middle_len(msg); |
2946 | } else if (msg->middle) { |
2947 | msg->middle->vec.iov_len = 0; |
2948 | } |
2949 | |
2950 | if (!front_len(msg) && !middle_len(msg) && !data_len(msg)) |
2951 | return process_message(con); |
2952 | |
2953 | if (con_secure(con)) |
2954 | return prepare_read_tail_secure(con); |
2955 | |
2956 | return prepare_read_tail_plain(con); |
2957 | } |
2958 | |
2959 | static int handle_preamble(struct ceph_connection *con) |
2960 | { |
2961 | struct ceph_frame_desc *desc = &con->v2.in_desc; |
2962 | int ret; |
2963 | |
2964 | if (con_secure(con)) { |
2965 | ret = decrypt_preamble(con); |
2966 | if (ret) { |
2967 | if (ret == -EBADMSG) |
2968 | con->error_msg = "integrity error, bad preamble auth tag" ; |
2969 | return ret; |
2970 | } |
2971 | } |
2972 | |
2973 | ret = decode_preamble(p: con->v2.in_buf, desc); |
2974 | if (ret) { |
2975 | if (ret == -EBADMSG) |
2976 | con->error_msg = "integrity error, bad crc" ; |
2977 | else |
2978 | con->error_msg = "protocol error, bad preamble" ; |
2979 | return ret; |
2980 | } |
2981 | |
2982 | dout("%s con %p tag %d seg_cnt %d %d+%d+%d+%d\n" , __func__, |
2983 | con, desc->fd_tag, desc->fd_seg_cnt, desc->fd_lens[0], |
2984 | desc->fd_lens[1], desc->fd_lens[2], desc->fd_lens[3]); |
2985 | |
2986 | if (!con_secure(con)) |
2987 | return prepare_read_control(con); |
2988 | |
2989 | if (desc->fd_lens[0] > CEPH_PREAMBLE_INLINE_LEN) |
2990 | return prepare_read_control_remainder(con); |
2991 | |
2992 | return __handle_control(con, CTRL_BODY(con->v2.in_buf)); |
2993 | } |
2994 | |
2995 | static int handle_control(struct ceph_connection *con) |
2996 | { |
2997 | int ctrl_len = con->v2.in_desc.fd_lens[0]; |
2998 | void *buf; |
2999 | int ret; |
3000 | |
3001 | WARN_ON(con_secure(con)); |
3002 | |
3003 | ret = verify_control_crc(con); |
3004 | if (ret) { |
3005 | con->error_msg = "integrity error, bad crc" ; |
3006 | return ret; |
3007 | } |
3008 | |
3009 | if (con->state == CEPH_CON_S_V2_AUTH) { |
3010 | buf = alloc_conn_buf(con, len: ctrl_len); |
3011 | if (!buf) |
3012 | return -ENOMEM; |
3013 | |
3014 | memcpy(buf, con->v2.in_kvecs[0].iov_base, ctrl_len); |
3015 | return __handle_control(con, p: buf); |
3016 | } |
3017 | |
3018 | return __handle_control(con, p: con->v2.in_kvecs[0].iov_base); |
3019 | } |
3020 | |
3021 | static int handle_control_remainder(struct ceph_connection *con) |
3022 | { |
3023 | int ret; |
3024 | |
3025 | WARN_ON(!con_secure(con)); |
3026 | |
3027 | ret = decrypt_control_remainder(con); |
3028 | if (ret) { |
3029 | if (ret == -EBADMSG) |
3030 | con->error_msg = "integrity error, bad control remainder auth tag" ; |
3031 | return ret; |
3032 | } |
3033 | |
3034 | return __handle_control(con, p: con->v2.in_kvecs[0].iov_base - |
3035 | CEPH_PREAMBLE_INLINE_LEN); |
3036 | } |
3037 | |
3038 | static int handle_epilogue(struct ceph_connection *con) |
3039 | { |
3040 | u32 front_crc, middle_crc, data_crc; |
3041 | int ret; |
3042 | |
3043 | if (con_secure(con)) { |
3044 | ret = decrypt_tail(con); |
3045 | if (ret) { |
3046 | if (ret == -EBADMSG) |
3047 | con->error_msg = "integrity error, bad epilogue auth tag" ; |
3048 | return ret; |
3049 | } |
3050 | |
3051 | /* just late_status */ |
3052 | ret = decode_epilogue(p: con->v2.in_buf, NULL, NULL, NULL); |
3053 | if (ret) { |
3054 | con->error_msg = "protocol error, bad epilogue" ; |
3055 | return ret; |
3056 | } |
3057 | } else { |
3058 | ret = decode_epilogue(p: con->v2.in_buf, front_crc: &front_crc, |
3059 | middle_crc: &middle_crc, data_crc: &data_crc); |
3060 | if (ret) { |
3061 | con->error_msg = "protocol error, bad epilogue" ; |
3062 | return ret; |
3063 | } |
3064 | |
3065 | ret = verify_epilogue_crcs(con, front_crc, middle_crc, |
3066 | data_crc); |
3067 | if (ret) { |
3068 | con->error_msg = "integrity error, bad crc" ; |
3069 | return ret; |
3070 | } |
3071 | } |
3072 | |
3073 | return process_message(con); |
3074 | } |
3075 | |
3076 | static void finish_skip(struct ceph_connection *con) |
3077 | { |
3078 | dout("%s con %p\n" , __func__, con); |
3079 | |
3080 | if (con_secure(con)) |
3081 | gcm_inc_nonce(nonce: &con->v2.in_gcm_nonce); |
3082 | |
3083 | __finish_skip(con); |
3084 | } |
3085 | |
3086 | static int populate_in_iter(struct ceph_connection *con) |
3087 | { |
3088 | int ret; |
3089 | |
3090 | dout("%s con %p state %d in_state %d\n" , __func__, con, con->state, |
3091 | con->v2.in_state); |
3092 | WARN_ON(iov_iter_count(&con->v2.in_iter)); |
3093 | |
3094 | if (con->state == CEPH_CON_S_V2_BANNER_PREFIX) { |
3095 | ret = process_banner_prefix(con); |
3096 | } else if (con->state == CEPH_CON_S_V2_BANNER_PAYLOAD) { |
3097 | ret = process_banner_payload(con); |
3098 | } else if ((con->state >= CEPH_CON_S_V2_HELLO && |
3099 | con->state <= CEPH_CON_S_V2_SESSION_RECONNECT) || |
3100 | con->state == CEPH_CON_S_OPEN) { |
3101 | switch (con->v2.in_state) { |
3102 | case IN_S_HANDLE_PREAMBLE: |
3103 | ret = handle_preamble(con); |
3104 | break; |
3105 | case IN_S_HANDLE_CONTROL: |
3106 | ret = handle_control(con); |
3107 | break; |
3108 | case IN_S_HANDLE_CONTROL_REMAINDER: |
3109 | ret = handle_control_remainder(con); |
3110 | break; |
3111 | case IN_S_PREPARE_READ_DATA: |
3112 | ret = prepare_read_data(con); |
3113 | break; |
3114 | case IN_S_PREPARE_READ_DATA_CONT: |
3115 | prepare_read_data_cont(con); |
3116 | ret = 0; |
3117 | break; |
3118 | case IN_S_PREPARE_READ_ENC_PAGE: |
3119 | prepare_read_enc_page(con); |
3120 | ret = 0; |
3121 | break; |
3122 | case IN_S_PREPARE_SPARSE_DATA: |
3123 | ret = prepare_sparse_read_data(con); |
3124 | break; |
3125 | case IN_S_PREPARE_SPARSE_DATA_CONT: |
3126 | ret = prepare_sparse_read_cont(con); |
3127 | break; |
3128 | case IN_S_HANDLE_EPILOGUE: |
3129 | ret = handle_epilogue(con); |
3130 | break; |
3131 | case IN_S_FINISH_SKIP: |
3132 | finish_skip(con); |
3133 | ret = 0; |
3134 | break; |
3135 | default: |
3136 | WARN(1, "bad in_state %d" , con->v2.in_state); |
3137 | return -EINVAL; |
3138 | } |
3139 | } else { |
3140 | WARN(1, "bad state %d" , con->state); |
3141 | return -EINVAL; |
3142 | } |
3143 | if (ret) { |
3144 | dout("%s con %p error %d\n" , __func__, con, ret); |
3145 | return ret; |
3146 | } |
3147 | |
3148 | if (WARN_ON(!iov_iter_count(&con->v2.in_iter))) |
3149 | return -ENODATA; |
3150 | dout("%s con %p populated %zu\n" , __func__, con, |
3151 | iov_iter_count(&con->v2.in_iter)); |
3152 | return 1; |
3153 | } |
3154 | |
3155 | int ceph_con_v2_try_read(struct ceph_connection *con) |
3156 | { |
3157 | int ret; |
3158 | |
3159 | dout("%s con %p state %d need %zu\n" , __func__, con, con->state, |
3160 | iov_iter_count(&con->v2.in_iter)); |
3161 | |
3162 | if (con->state == CEPH_CON_S_PREOPEN) |
3163 | return 0; |
3164 | |
3165 | /* |
3166 | * We should always have something pending here. If not, |
3167 | * avoid calling populate_in_iter() as if we read something |
3168 | * (ceph_tcp_recv() would immediately return 1). |
3169 | */ |
3170 | if (WARN_ON(!iov_iter_count(&con->v2.in_iter))) |
3171 | return -ENODATA; |
3172 | |
3173 | for (;;) { |
3174 | ret = ceph_tcp_recv(con); |
3175 | if (ret <= 0) |
3176 | return ret; |
3177 | |
3178 | ret = populate_in_iter(con); |
3179 | if (ret <= 0) { |
3180 | if (ret && ret != -EAGAIN && !con->error_msg) |
3181 | con->error_msg = "read processing error" ; |
3182 | return ret; |
3183 | } |
3184 | } |
3185 | } |
3186 | |
3187 | static void queue_data(struct ceph_connection *con) |
3188 | { |
3189 | struct bio_vec bv; |
3190 | |
3191 | con->v2.out_epil.data_crc = -1; |
3192 | ceph_msg_data_cursor_init(cursor: &con->v2.out_cursor, msg: con->out_msg, |
3193 | length: data_len(msg: con->out_msg)); |
3194 | |
3195 | get_bvec_at(cursor: &con->v2.out_cursor, bv: &bv); |
3196 | set_out_bvec(con, bv: &bv, zerocopy: true); |
3197 | con->v2.out_state = OUT_S_QUEUE_DATA_CONT; |
3198 | } |
3199 | |
3200 | static void queue_data_cont(struct ceph_connection *con) |
3201 | { |
3202 | struct bio_vec bv; |
3203 | |
3204 | con->v2.out_epil.data_crc = ceph_crc32c_page( |
3205 | crc: con->v2.out_epil.data_crc, page: con->v2.out_bvec.bv_page, |
3206 | page_offset: con->v2.out_bvec.bv_offset, length: con->v2.out_bvec.bv_len); |
3207 | |
3208 | ceph_msg_data_advance(cursor: &con->v2.out_cursor, bytes: con->v2.out_bvec.bv_len); |
3209 | if (con->v2.out_cursor.total_resid) { |
3210 | get_bvec_at(cursor: &con->v2.out_cursor, bv: &bv); |
3211 | set_out_bvec(con, bv: &bv, zerocopy: true); |
3212 | WARN_ON(con->v2.out_state != OUT_S_QUEUE_DATA_CONT); |
3213 | return; |
3214 | } |
3215 | |
3216 | /* |
3217 | * We've written all data. Queue epilogue. Once it's written, |
3218 | * we are done. |
3219 | */ |
3220 | reset_out_kvecs(con); |
3221 | prepare_epilogue_plain(con, aborted: false); |
3222 | con->v2.out_state = OUT_S_FINISH_MESSAGE; |
3223 | } |
3224 | |
3225 | static void queue_enc_page(struct ceph_connection *con) |
3226 | { |
3227 | struct bio_vec bv; |
3228 | |
3229 | dout("%s con %p i %d resid %d\n" , __func__, con, con->v2.out_enc_i, |
3230 | con->v2.out_enc_resid); |
3231 | WARN_ON(!con->v2.out_enc_resid); |
3232 | |
3233 | bvec_set_page(bv: &bv, page: con->v2.out_enc_pages[con->v2.out_enc_i], |
3234 | min(con->v2.out_enc_resid, (int)PAGE_SIZE), offset: 0); |
3235 | |
3236 | set_out_bvec(con, bv: &bv, zerocopy: false); |
3237 | con->v2.out_enc_i++; |
3238 | con->v2.out_enc_resid -= bv.bv_len; |
3239 | |
3240 | if (con->v2.out_enc_resid) { |
3241 | WARN_ON(con->v2.out_state != OUT_S_QUEUE_ENC_PAGE); |
3242 | return; |
3243 | } |
3244 | |
3245 | /* |
3246 | * We've queued the last piece of ciphertext (ending with |
3247 | * epilogue) + auth tag. Once it's written, we are done. |
3248 | */ |
3249 | WARN_ON(con->v2.out_enc_i != con->v2.out_enc_page_cnt); |
3250 | con->v2.out_state = OUT_S_FINISH_MESSAGE; |
3251 | } |
3252 | |
3253 | static void queue_zeros(struct ceph_connection *con) |
3254 | { |
3255 | dout("%s con %p out_zero %d\n" , __func__, con, con->v2.out_zero); |
3256 | |
3257 | if (con->v2.out_zero) { |
3258 | set_out_bvec_zero(con); |
3259 | con->v2.out_zero -= con->v2.out_bvec.bv_len; |
3260 | con->v2.out_state = OUT_S_QUEUE_ZEROS; |
3261 | return; |
3262 | } |
3263 | |
3264 | /* |
3265 | * We've zero-filled everything up to epilogue. Queue epilogue |
3266 | * with late_status set to ABORTED and crcs adjusted for zeros. |
3267 | * Once it's written, we are done patching up for the revoke. |
3268 | */ |
3269 | reset_out_kvecs(con); |
3270 | prepare_epilogue_plain(con, aborted: true); |
3271 | con->v2.out_state = OUT_S_FINISH_MESSAGE; |
3272 | } |
3273 | |
3274 | static void finish_message(struct ceph_connection *con) |
3275 | { |
3276 | dout("%s con %p msg %p\n" , __func__, con, con->out_msg); |
3277 | |
3278 | /* we end up here both plain and secure modes */ |
3279 | if (con->v2.out_enc_pages) { |
3280 | WARN_ON(!con->v2.out_enc_page_cnt); |
3281 | ceph_release_page_vector(pages: con->v2.out_enc_pages, |
3282 | num_pages: con->v2.out_enc_page_cnt); |
3283 | con->v2.out_enc_pages = NULL; |
3284 | con->v2.out_enc_page_cnt = 0; |
3285 | } |
3286 | /* message may have been revoked */ |
3287 | if (con->out_msg) { |
3288 | ceph_msg_put(msg: con->out_msg); |
3289 | con->out_msg = NULL; |
3290 | } |
3291 | |
3292 | con->v2.out_state = OUT_S_GET_NEXT; |
3293 | } |
3294 | |
3295 | static int populate_out_iter(struct ceph_connection *con) |
3296 | { |
3297 | int ret; |
3298 | |
3299 | dout("%s con %p state %d out_state %d\n" , __func__, con, con->state, |
3300 | con->v2.out_state); |
3301 | WARN_ON(iov_iter_count(&con->v2.out_iter)); |
3302 | |
3303 | if (con->state != CEPH_CON_S_OPEN) { |
3304 | WARN_ON(con->state < CEPH_CON_S_V2_BANNER_PREFIX || |
3305 | con->state > CEPH_CON_S_V2_SESSION_RECONNECT); |
3306 | goto nothing_pending; |
3307 | } |
3308 | |
3309 | switch (con->v2.out_state) { |
3310 | case OUT_S_QUEUE_DATA: |
3311 | WARN_ON(!con->out_msg); |
3312 | queue_data(con); |
3313 | goto populated; |
3314 | case OUT_S_QUEUE_DATA_CONT: |
3315 | WARN_ON(!con->out_msg); |
3316 | queue_data_cont(con); |
3317 | goto populated; |
3318 | case OUT_S_QUEUE_ENC_PAGE: |
3319 | queue_enc_page(con); |
3320 | goto populated; |
3321 | case OUT_S_QUEUE_ZEROS: |
3322 | WARN_ON(con->out_msg); /* revoked */ |
3323 | queue_zeros(con); |
3324 | goto populated; |
3325 | case OUT_S_FINISH_MESSAGE: |
3326 | finish_message(con); |
3327 | break; |
3328 | case OUT_S_GET_NEXT: |
3329 | break; |
3330 | default: |
3331 | WARN(1, "bad out_state %d" , con->v2.out_state); |
3332 | return -EINVAL; |
3333 | } |
3334 | |
3335 | WARN_ON(con->v2.out_state != OUT_S_GET_NEXT); |
3336 | if (ceph_con_flag_test_and_clear(con, CEPH_CON_F_KEEPALIVE_PENDING)) { |
3337 | ret = prepare_keepalive2(con); |
3338 | if (ret) { |
3339 | pr_err("prepare_keepalive2 failed: %d\n" , ret); |
3340 | return ret; |
3341 | } |
3342 | } else if (!list_empty(head: &con->out_queue)) { |
3343 | ceph_con_get_out_msg(con); |
3344 | ret = prepare_message(con); |
3345 | if (ret) { |
3346 | pr_err("prepare_message failed: %d\n" , ret); |
3347 | return ret; |
3348 | } |
3349 | } else if (con->in_seq > con->in_seq_acked) { |
3350 | ret = prepare_ack(con); |
3351 | if (ret) { |
3352 | pr_err("prepare_ack failed: %d\n" , ret); |
3353 | return ret; |
3354 | } |
3355 | } else { |
3356 | goto nothing_pending; |
3357 | } |
3358 | |
3359 | populated: |
3360 | if (WARN_ON(!iov_iter_count(&con->v2.out_iter))) |
3361 | return -ENODATA; |
3362 | dout("%s con %p populated %zu\n" , __func__, con, |
3363 | iov_iter_count(&con->v2.out_iter)); |
3364 | return 1; |
3365 | |
3366 | nothing_pending: |
3367 | WARN_ON(iov_iter_count(&con->v2.out_iter)); |
3368 | dout("%s con %p nothing pending\n" , __func__, con); |
3369 | ceph_con_flag_clear(con, CEPH_CON_F_WRITE_PENDING); |
3370 | return 0; |
3371 | } |
3372 | |
3373 | int ceph_con_v2_try_write(struct ceph_connection *con) |
3374 | { |
3375 | int ret; |
3376 | |
3377 | dout("%s con %p state %d have %zu\n" , __func__, con, con->state, |
3378 | iov_iter_count(&con->v2.out_iter)); |
3379 | |
3380 | /* open the socket first? */ |
3381 | if (con->state == CEPH_CON_S_PREOPEN) { |
3382 | WARN_ON(con->peer_addr.type != CEPH_ENTITY_ADDR_TYPE_MSGR2); |
3383 | |
3384 | /* |
3385 | * Always bump global_seq. Bump connect_seq only if |
3386 | * there is a session (i.e. we are reconnecting and will |
3387 | * send session_reconnect instead of client_ident). |
3388 | */ |
3389 | con->v2.global_seq = ceph_get_global_seq(msgr: con->msgr, gt: 0); |
3390 | if (con->v2.server_cookie) |
3391 | con->v2.connect_seq++; |
3392 | |
3393 | ret = prepare_read_banner_prefix(con); |
3394 | if (ret) { |
3395 | pr_err("prepare_read_banner_prefix failed: %d\n" , ret); |
3396 | con->error_msg = "connect error" ; |
3397 | return ret; |
3398 | } |
3399 | |
3400 | reset_out_kvecs(con); |
3401 | ret = prepare_banner(con); |
3402 | if (ret) { |
3403 | pr_err("prepare_banner failed: %d\n" , ret); |
3404 | con->error_msg = "connect error" ; |
3405 | return ret; |
3406 | } |
3407 | |
3408 | ret = ceph_tcp_connect(con); |
3409 | if (ret) { |
3410 | pr_err("ceph_tcp_connect failed: %d\n" , ret); |
3411 | con->error_msg = "connect error" ; |
3412 | return ret; |
3413 | } |
3414 | } |
3415 | |
3416 | if (!iov_iter_count(i: &con->v2.out_iter)) { |
3417 | ret = populate_out_iter(con); |
3418 | if (ret <= 0) { |
3419 | if (ret && ret != -EAGAIN && !con->error_msg) |
3420 | con->error_msg = "write processing error" ; |
3421 | return ret; |
3422 | } |
3423 | } |
3424 | |
3425 | tcp_sock_set_cork(sk: con->sock->sk, on: true); |
3426 | for (;;) { |
3427 | ret = ceph_tcp_send(con); |
3428 | if (ret <= 0) |
3429 | break; |
3430 | |
3431 | ret = populate_out_iter(con); |
3432 | if (ret <= 0) { |
3433 | if (ret && ret != -EAGAIN && !con->error_msg) |
3434 | con->error_msg = "write processing error" ; |
3435 | break; |
3436 | } |
3437 | } |
3438 | |
3439 | tcp_sock_set_cork(sk: con->sock->sk, on: false); |
3440 | return ret; |
3441 | } |
3442 | |
3443 | static u32 crc32c_zeros(u32 crc, int zero_len) |
3444 | { |
3445 | int len; |
3446 | |
3447 | while (zero_len) { |
3448 | len = min(zero_len, (int)PAGE_SIZE); |
3449 | crc = crc32c(crc, page_address(ceph_zero_page), length: len); |
3450 | zero_len -= len; |
3451 | } |
3452 | |
3453 | return crc; |
3454 | } |
3455 | |
3456 | static void prepare_zero_front(struct ceph_connection *con, int resid) |
3457 | { |
3458 | int sent; |
3459 | |
3460 | WARN_ON(!resid || resid > front_len(con->out_msg)); |
3461 | sent = front_len(msg: con->out_msg) - resid; |
3462 | dout("%s con %p sent %d resid %d\n" , __func__, con, sent, resid); |
3463 | |
3464 | if (sent) { |
3465 | con->v2.out_epil.front_crc = |
3466 | crc32c(crc: -1, address: con->out_msg->front.iov_base, length: sent); |
3467 | con->v2.out_epil.front_crc = |
3468 | crc32c_zeros(crc: con->v2.out_epil.front_crc, zero_len: resid); |
3469 | } else { |
3470 | con->v2.out_epil.front_crc = crc32c_zeros(crc: -1, zero_len: resid); |
3471 | } |
3472 | |
3473 | con->v2.out_iter.count -= resid; |
3474 | out_zero_add(con, len: resid); |
3475 | } |
3476 | |
3477 | static void prepare_zero_middle(struct ceph_connection *con, int resid) |
3478 | { |
3479 | int sent; |
3480 | |
3481 | WARN_ON(!resid || resid > middle_len(con->out_msg)); |
3482 | sent = middle_len(msg: con->out_msg) - resid; |
3483 | dout("%s con %p sent %d resid %d\n" , __func__, con, sent, resid); |
3484 | |
3485 | if (sent) { |
3486 | con->v2.out_epil.middle_crc = |
3487 | crc32c(crc: -1, address: con->out_msg->middle->vec.iov_base, length: sent); |
3488 | con->v2.out_epil.middle_crc = |
3489 | crc32c_zeros(crc: con->v2.out_epil.middle_crc, zero_len: resid); |
3490 | } else { |
3491 | con->v2.out_epil.middle_crc = crc32c_zeros(crc: -1, zero_len: resid); |
3492 | } |
3493 | |
3494 | con->v2.out_iter.count -= resid; |
3495 | out_zero_add(con, len: resid); |
3496 | } |
3497 | |
3498 | static void prepare_zero_data(struct ceph_connection *con) |
3499 | { |
3500 | dout("%s con %p\n" , __func__, con); |
3501 | con->v2.out_epil.data_crc = crc32c_zeros(crc: -1, zero_len: data_len(msg: con->out_msg)); |
3502 | out_zero_add(con, len: data_len(msg: con->out_msg)); |
3503 | } |
3504 | |
3505 | static void revoke_at_queue_data(struct ceph_connection *con) |
3506 | { |
3507 | int boundary; |
3508 | int resid; |
3509 | |
3510 | WARN_ON(!data_len(con->out_msg)); |
3511 | WARN_ON(!iov_iter_is_kvec(&con->v2.out_iter)); |
3512 | resid = iov_iter_count(i: &con->v2.out_iter); |
3513 | |
3514 | boundary = front_len(msg: con->out_msg) + middle_len(msg: con->out_msg); |
3515 | if (resid > boundary) { |
3516 | resid -= boundary; |
3517 | WARN_ON(resid > MESSAGE_HEAD_PLAIN_LEN); |
3518 | dout("%s con %p was sending head\n" , __func__, con); |
3519 | if (front_len(msg: con->out_msg)) |
3520 | prepare_zero_front(con, resid: front_len(msg: con->out_msg)); |
3521 | if (middle_len(msg: con->out_msg)) |
3522 | prepare_zero_middle(con, resid: middle_len(msg: con->out_msg)); |
3523 | prepare_zero_data(con); |
3524 | WARN_ON(iov_iter_count(&con->v2.out_iter) != resid); |
3525 | con->v2.out_state = OUT_S_QUEUE_ZEROS; |
3526 | return; |
3527 | } |
3528 | |
3529 | boundary = middle_len(msg: con->out_msg); |
3530 | if (resid > boundary) { |
3531 | resid -= boundary; |
3532 | dout("%s con %p was sending front\n" , __func__, con); |
3533 | prepare_zero_front(con, resid); |
3534 | if (middle_len(msg: con->out_msg)) |
3535 | prepare_zero_middle(con, resid: middle_len(msg: con->out_msg)); |
3536 | prepare_zero_data(con); |
3537 | queue_zeros(con); |
3538 | return; |
3539 | } |
3540 | |
3541 | WARN_ON(!resid); |
3542 | dout("%s con %p was sending middle\n" , __func__, con); |
3543 | prepare_zero_middle(con, resid); |
3544 | prepare_zero_data(con); |
3545 | queue_zeros(con); |
3546 | } |
3547 | |
3548 | static void revoke_at_queue_data_cont(struct ceph_connection *con) |
3549 | { |
3550 | int sent, resid; /* current piece of data */ |
3551 | |
3552 | WARN_ON(!data_len(con->out_msg)); |
3553 | WARN_ON(!iov_iter_is_bvec(&con->v2.out_iter)); |
3554 | resid = iov_iter_count(i: &con->v2.out_iter); |
3555 | WARN_ON(!resid || resid > con->v2.out_bvec.bv_len); |
3556 | sent = con->v2.out_bvec.bv_len - resid; |
3557 | dout("%s con %p sent %d resid %d\n" , __func__, con, sent, resid); |
3558 | |
3559 | if (sent) { |
3560 | con->v2.out_epil.data_crc = ceph_crc32c_page( |
3561 | crc: con->v2.out_epil.data_crc, page: con->v2.out_bvec.bv_page, |
3562 | page_offset: con->v2.out_bvec.bv_offset, length: sent); |
3563 | ceph_msg_data_advance(cursor: &con->v2.out_cursor, bytes: sent); |
3564 | } |
3565 | WARN_ON(resid > con->v2.out_cursor.total_resid); |
3566 | con->v2.out_epil.data_crc = crc32c_zeros(crc: con->v2.out_epil.data_crc, |
3567 | zero_len: con->v2.out_cursor.total_resid); |
3568 | |
3569 | con->v2.out_iter.count -= resid; |
3570 | out_zero_add(con, len: con->v2.out_cursor.total_resid); |
3571 | queue_zeros(con); |
3572 | } |
3573 | |
3574 | static void revoke_at_finish_message(struct ceph_connection *con) |
3575 | { |
3576 | int boundary; |
3577 | int resid; |
3578 | |
3579 | WARN_ON(!iov_iter_is_kvec(&con->v2.out_iter)); |
3580 | resid = iov_iter_count(i: &con->v2.out_iter); |
3581 | |
3582 | if (!front_len(msg: con->out_msg) && !middle_len(msg: con->out_msg) && |
3583 | !data_len(msg: con->out_msg)) { |
3584 | WARN_ON(!resid || resid > MESSAGE_HEAD_PLAIN_LEN); |
3585 | dout("%s con %p was sending head (empty message) - noop\n" , |
3586 | __func__, con); |
3587 | return; |
3588 | } |
3589 | |
3590 | boundary = front_len(msg: con->out_msg) + middle_len(msg: con->out_msg) + |
3591 | CEPH_EPILOGUE_PLAIN_LEN; |
3592 | if (resid > boundary) { |
3593 | resid -= boundary; |
3594 | WARN_ON(resid > MESSAGE_HEAD_PLAIN_LEN); |
3595 | dout("%s con %p was sending head\n" , __func__, con); |
3596 | if (front_len(msg: con->out_msg)) |
3597 | prepare_zero_front(con, resid: front_len(msg: con->out_msg)); |
3598 | if (middle_len(msg: con->out_msg)) |
3599 | prepare_zero_middle(con, resid: middle_len(msg: con->out_msg)); |
3600 | con->v2.out_iter.count -= CEPH_EPILOGUE_PLAIN_LEN; |
3601 | WARN_ON(iov_iter_count(&con->v2.out_iter) != resid); |
3602 | con->v2.out_state = OUT_S_QUEUE_ZEROS; |
3603 | return; |
3604 | } |
3605 | |
3606 | boundary = middle_len(msg: con->out_msg) + CEPH_EPILOGUE_PLAIN_LEN; |
3607 | if (resid > boundary) { |
3608 | resid -= boundary; |
3609 | dout("%s con %p was sending front\n" , __func__, con); |
3610 | prepare_zero_front(con, resid); |
3611 | if (middle_len(msg: con->out_msg)) |
3612 | prepare_zero_middle(con, resid: middle_len(msg: con->out_msg)); |
3613 | con->v2.out_iter.count -= CEPH_EPILOGUE_PLAIN_LEN; |
3614 | queue_zeros(con); |
3615 | return; |
3616 | } |
3617 | |
3618 | boundary = CEPH_EPILOGUE_PLAIN_LEN; |
3619 | if (resid > boundary) { |
3620 | resid -= boundary; |
3621 | dout("%s con %p was sending middle\n" , __func__, con); |
3622 | prepare_zero_middle(con, resid); |
3623 | con->v2.out_iter.count -= CEPH_EPILOGUE_PLAIN_LEN; |
3624 | queue_zeros(con); |
3625 | return; |
3626 | } |
3627 | |
3628 | WARN_ON(!resid); |
3629 | dout("%s con %p was sending epilogue - noop\n" , __func__, con); |
3630 | } |
3631 | |
3632 | void ceph_con_v2_revoke(struct ceph_connection *con) |
3633 | { |
3634 | WARN_ON(con->v2.out_zero); |
3635 | |
3636 | if (con_secure(con)) { |
3637 | WARN_ON(con->v2.out_state != OUT_S_QUEUE_ENC_PAGE && |
3638 | con->v2.out_state != OUT_S_FINISH_MESSAGE); |
3639 | dout("%s con %p secure - noop\n" , __func__, con); |
3640 | return; |
3641 | } |
3642 | |
3643 | switch (con->v2.out_state) { |
3644 | case OUT_S_QUEUE_DATA: |
3645 | revoke_at_queue_data(con); |
3646 | break; |
3647 | case OUT_S_QUEUE_DATA_CONT: |
3648 | revoke_at_queue_data_cont(con); |
3649 | break; |
3650 | case OUT_S_FINISH_MESSAGE: |
3651 | revoke_at_finish_message(con); |
3652 | break; |
3653 | default: |
3654 | WARN(1, "bad out_state %d" , con->v2.out_state); |
3655 | break; |
3656 | } |
3657 | } |
3658 | |
3659 | static void revoke_at_prepare_read_data(struct ceph_connection *con) |
3660 | { |
3661 | int remaining; |
3662 | int resid; |
3663 | |
3664 | WARN_ON(con_secure(con)); |
3665 | WARN_ON(!data_len(con->in_msg)); |
3666 | WARN_ON(!iov_iter_is_kvec(&con->v2.in_iter)); |
3667 | resid = iov_iter_count(i: &con->v2.in_iter); |
3668 | WARN_ON(!resid); |
3669 | |
3670 | remaining = data_len(msg: con->in_msg) + CEPH_EPILOGUE_PLAIN_LEN; |
3671 | dout("%s con %p resid %d remaining %d\n" , __func__, con, resid, |
3672 | remaining); |
3673 | con->v2.in_iter.count -= resid; |
3674 | set_in_skip(con, len: resid + remaining); |
3675 | con->v2.in_state = IN_S_FINISH_SKIP; |
3676 | } |
3677 | |
3678 | static void revoke_at_prepare_read_data_cont(struct ceph_connection *con) |
3679 | { |
3680 | int recved, resid; /* current piece of data */ |
3681 | int remaining; |
3682 | |
3683 | WARN_ON(con_secure(con)); |
3684 | WARN_ON(!data_len(con->in_msg)); |
3685 | WARN_ON(!iov_iter_is_bvec(&con->v2.in_iter)); |
3686 | resid = iov_iter_count(i: &con->v2.in_iter); |
3687 | WARN_ON(!resid || resid > con->v2.in_bvec.bv_len); |
3688 | recved = con->v2.in_bvec.bv_len - resid; |
3689 | dout("%s con %p recved %d resid %d\n" , __func__, con, recved, resid); |
3690 | |
3691 | if (recved) |
3692 | ceph_msg_data_advance(cursor: &con->v2.in_cursor, bytes: recved); |
3693 | WARN_ON(resid > con->v2.in_cursor.total_resid); |
3694 | |
3695 | remaining = CEPH_EPILOGUE_PLAIN_LEN; |
3696 | dout("%s con %p total_resid %zu remaining %d\n" , __func__, con, |
3697 | con->v2.in_cursor.total_resid, remaining); |
3698 | con->v2.in_iter.count -= resid; |
3699 | set_in_skip(con, len: con->v2.in_cursor.total_resid + remaining); |
3700 | con->v2.in_state = IN_S_FINISH_SKIP; |
3701 | } |
3702 | |
3703 | static void revoke_at_prepare_read_enc_page(struct ceph_connection *con) |
3704 | { |
3705 | int resid; /* current enc page (not necessarily data) */ |
3706 | |
3707 | WARN_ON(!con_secure(con)); |
3708 | WARN_ON(!iov_iter_is_bvec(&con->v2.in_iter)); |
3709 | resid = iov_iter_count(i: &con->v2.in_iter); |
3710 | WARN_ON(!resid || resid > con->v2.in_bvec.bv_len); |
3711 | |
3712 | dout("%s con %p resid %d enc_resid %d\n" , __func__, con, resid, |
3713 | con->v2.in_enc_resid); |
3714 | con->v2.in_iter.count -= resid; |
3715 | set_in_skip(con, len: resid + con->v2.in_enc_resid); |
3716 | con->v2.in_state = IN_S_FINISH_SKIP; |
3717 | } |
3718 | |
3719 | static void revoke_at_prepare_sparse_data(struct ceph_connection *con) |
3720 | { |
3721 | int resid; /* current piece of data */ |
3722 | int remaining; |
3723 | |
3724 | WARN_ON(con_secure(con)); |
3725 | WARN_ON(!data_len(con->in_msg)); |
3726 | WARN_ON(!iov_iter_is_bvec(&con->v2.in_iter)); |
3727 | resid = iov_iter_count(i: &con->v2.in_iter); |
3728 | dout("%s con %p resid %d\n" , __func__, con, resid); |
3729 | |
3730 | remaining = CEPH_EPILOGUE_PLAIN_LEN + con->v2.data_len_remain; |
3731 | con->v2.in_iter.count -= resid; |
3732 | set_in_skip(con, len: resid + remaining); |
3733 | con->v2.in_state = IN_S_FINISH_SKIP; |
3734 | } |
3735 | |
3736 | static void revoke_at_handle_epilogue(struct ceph_connection *con) |
3737 | { |
3738 | int resid; |
3739 | |
3740 | resid = iov_iter_count(i: &con->v2.in_iter); |
3741 | WARN_ON(!resid); |
3742 | |
3743 | dout("%s con %p resid %d\n" , __func__, con, resid); |
3744 | con->v2.in_iter.count -= resid; |
3745 | set_in_skip(con, len: resid); |
3746 | con->v2.in_state = IN_S_FINISH_SKIP; |
3747 | } |
3748 | |
3749 | void ceph_con_v2_revoke_incoming(struct ceph_connection *con) |
3750 | { |
3751 | switch (con->v2.in_state) { |
3752 | case IN_S_PREPARE_SPARSE_DATA: |
3753 | case IN_S_PREPARE_READ_DATA: |
3754 | revoke_at_prepare_read_data(con); |
3755 | break; |
3756 | case IN_S_PREPARE_READ_DATA_CONT: |
3757 | revoke_at_prepare_read_data_cont(con); |
3758 | break; |
3759 | case IN_S_PREPARE_READ_ENC_PAGE: |
3760 | revoke_at_prepare_read_enc_page(con); |
3761 | break; |
3762 | case IN_S_PREPARE_SPARSE_DATA_CONT: |
3763 | revoke_at_prepare_sparse_data(con); |
3764 | break; |
3765 | case IN_S_HANDLE_EPILOGUE: |
3766 | revoke_at_handle_epilogue(con); |
3767 | break; |
3768 | default: |
3769 | WARN(1, "bad in_state %d" , con->v2.in_state); |
3770 | break; |
3771 | } |
3772 | } |
3773 | |
3774 | bool ceph_con_v2_opened(struct ceph_connection *con) |
3775 | { |
3776 | return con->v2.peer_global_seq; |
3777 | } |
3778 | |
3779 | void ceph_con_v2_reset_session(struct ceph_connection *con) |
3780 | { |
3781 | con->v2.client_cookie = 0; |
3782 | con->v2.server_cookie = 0; |
3783 | con->v2.global_seq = 0; |
3784 | con->v2.connect_seq = 0; |
3785 | con->v2.peer_global_seq = 0; |
3786 | } |
3787 | |
3788 | void ceph_con_v2_reset_protocol(struct ceph_connection *con) |
3789 | { |
3790 | iov_iter_truncate(i: &con->v2.in_iter, count: 0); |
3791 | iov_iter_truncate(i: &con->v2.out_iter, count: 0); |
3792 | con->v2.out_zero = 0; |
3793 | |
3794 | clear_in_sign_kvecs(con); |
3795 | clear_out_sign_kvecs(con); |
3796 | free_conn_bufs(con); |
3797 | |
3798 | if (con->v2.in_enc_pages) { |
3799 | WARN_ON(!con->v2.in_enc_page_cnt); |
3800 | ceph_release_page_vector(pages: con->v2.in_enc_pages, |
3801 | num_pages: con->v2.in_enc_page_cnt); |
3802 | con->v2.in_enc_pages = NULL; |
3803 | con->v2.in_enc_page_cnt = 0; |
3804 | } |
3805 | if (con->v2.out_enc_pages) { |
3806 | WARN_ON(!con->v2.out_enc_page_cnt); |
3807 | ceph_release_page_vector(pages: con->v2.out_enc_pages, |
3808 | num_pages: con->v2.out_enc_page_cnt); |
3809 | con->v2.out_enc_pages = NULL; |
3810 | con->v2.out_enc_page_cnt = 0; |
3811 | } |
3812 | |
3813 | con->v2.con_mode = CEPH_CON_MODE_UNKNOWN; |
3814 | memzero_explicit(s: &con->v2.in_gcm_nonce, CEPH_GCM_IV_LEN); |
3815 | memzero_explicit(s: &con->v2.out_gcm_nonce, CEPH_GCM_IV_LEN); |
3816 | |
3817 | if (con->v2.hmac_tfm) { |
3818 | crypto_free_shash(tfm: con->v2.hmac_tfm); |
3819 | con->v2.hmac_tfm = NULL; |
3820 | } |
3821 | if (con->v2.gcm_req) { |
3822 | aead_request_free(req: con->v2.gcm_req); |
3823 | con->v2.gcm_req = NULL; |
3824 | } |
3825 | if (con->v2.gcm_tfm) { |
3826 | crypto_free_aead(tfm: con->v2.gcm_tfm); |
3827 | con->v2.gcm_tfm = NULL; |
3828 | } |
3829 | } |
3830 | |