Commit | Line | Data |
---|---|---|
2f713615 ID |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | #include <linux/ceph/ceph_debug.h> | |
3 | ||
4 | #include <linux/bvec.h> | |
5 | #include <linux/crc32c.h> | |
6 | #include <linux/net.h> | |
7 | #include <linux/socket.h> | |
8 | #include <net/sock.h> | |
9 | ||
10 | #include <linux/ceph/ceph_features.h> | |
11 | #include <linux/ceph/decode.h> | |
12 | #include <linux/ceph/libceph.h> | |
13 | #include <linux/ceph/messenger.h> | |
14 | ||
15 | /* static tag bytes (protocol control messages) */ | |
16 | static char tag_msg = CEPH_MSGR_TAG_MSG; | |
17 | static char tag_ack = CEPH_MSGR_TAG_ACK; | |
18 | static char tag_keepalive = CEPH_MSGR_TAG_KEEPALIVE; | |
19 | static char tag_keepalive2 = CEPH_MSGR_TAG_KEEPALIVE2; | |
20 | ||
21 | /* | |
22 | * If @buf is NULL, discard up to @len bytes. | |
23 | */ | |
24 | static int ceph_tcp_recvmsg(struct socket *sock, void *buf, size_t len) | |
25 | { | |
26 | struct kvec iov = {buf, len}; | |
27 | struct msghdr msg = { .msg_flags = MSG_DONTWAIT | MSG_NOSIGNAL }; | |
28 | int r; | |
29 | ||
30 | if (!buf) | |
31 | msg.msg_flags |= MSG_TRUNC; | |
32 | ||
de4eda9d | 33 | iov_iter_kvec(&msg.msg_iter, ITER_DEST, &iov, 1, len); |
2f713615 ID |
34 | r = sock_recvmsg(sock, &msg, msg.msg_flags); |
35 | if (r == -EAGAIN) | |
36 | r = 0; | |
37 | return r; | |
38 | } | |
39 | ||
40 | static int ceph_tcp_recvpage(struct socket *sock, struct page *page, | |
41 | int page_offset, size_t length) | |
42 | { | |
1eb9cd15 | 43 | struct bio_vec bvec; |
2f713615 ID |
44 | struct msghdr msg = { .msg_flags = MSG_DONTWAIT | MSG_NOSIGNAL }; |
45 | int r; | |
46 | ||
47 | BUG_ON(page_offset + length > PAGE_SIZE); | |
1eb9cd15 | 48 | bvec_set_page(&bvec, page, length, page_offset); |
de4eda9d | 49 | iov_iter_bvec(&msg.msg_iter, ITER_DEST, &bvec, 1, length); |
2f713615 ID |
50 | r = sock_recvmsg(sock, &msg, msg.msg_flags); |
51 | if (r == -EAGAIN) | |
52 | r = 0; | |
53 | return r; | |
54 | } | |
55 | ||
56 | /* | |
57 | * write something. @more is true if caller will be sending more data | |
58 | * shortly. | |
59 | */ | |
60 | static int ceph_tcp_sendmsg(struct socket *sock, struct kvec *iov, | |
61 | size_t kvlen, size_t len, bool more) | |
62 | { | |
63 | struct msghdr msg = { .msg_flags = MSG_DONTWAIT | MSG_NOSIGNAL }; | |
64 | int r; | |
65 | ||
66 | if (more) | |
67 | msg.msg_flags |= MSG_MORE; | |
68 | else | |
69 | msg.msg_flags |= MSG_EOR; /* superfluous, but what the hell */ | |
70 | ||
71 | r = kernel_sendmsg(sock, &msg, iov, kvlen, len); | |
72 | if (r == -EAGAIN) | |
73 | r = 0; | |
74 | return r; | |
75 | } | |
76 | ||
5da4d7b8 DH |
77 | /* |
78 | * @more: MSG_MORE or 0. | |
79 | */ | |
80 | static int ceph_tcp_sendpage(struct socket *sock, struct page *page, | |
81 | int offset, size_t size, int more) | |
82 | { | |
83 | struct msghdr msg = { | |
84 | .msg_flags = MSG_DONTWAIT | MSG_NOSIGNAL | more, | |
85 | }; | |
86 | struct bio_vec bvec; | |
87 | int ret; | |
88 | ||
89 | /* | |
90 | * MSG_SPLICE_PAGES cannot properly handle pages with page_count == 0, | |
91 | * we need to fall back to sendmsg if that's the case. | |
92 | * | |
93 | * Same goes for slab pages: skb_can_coalesce() allows | |
94 | * coalescing neighboring slab objects into a single frag which | |
95 | * triggers one of hardened usercopy checks. | |
96 | */ | |
97 | if (sendpage_ok(page)) | |
98 | msg.msg_flags |= MSG_SPLICE_PAGES; | |
99 | ||
100 | bvec_set_page(&bvec, page, size, offset); | |
101 | iov_iter_bvec(&msg.msg_iter, ITER_SOURCE, &bvec, 1, size); | |
102 | ||
103 | ret = sock_sendmsg(sock, &msg); | |
104 | if (ret == -EAGAIN) | |
105 | ret = 0; | |
106 | ||
107 | return ret; | |
108 | } | |
109 | ||
2f713615 ID |
110 | static void con_out_kvec_reset(struct ceph_connection *con) |
111 | { | |
a56dd9bf | 112 | BUG_ON(con->v1.out_skip); |
2f713615 | 113 | |
a56dd9bf ID |
114 | con->v1.out_kvec_left = 0; |
115 | con->v1.out_kvec_bytes = 0; | |
116 | con->v1.out_kvec_cur = &con->v1.out_kvec[0]; | |
2f713615 ID |
117 | } |
118 | ||
119 | static void con_out_kvec_add(struct ceph_connection *con, | |
120 | size_t size, void *data) | |
121 | { | |
a56dd9bf | 122 | int index = con->v1.out_kvec_left; |
2f713615 | 123 | |
a56dd9bf ID |
124 | BUG_ON(con->v1.out_skip); |
125 | BUG_ON(index >= ARRAY_SIZE(con->v1.out_kvec)); | |
2f713615 | 126 | |
a56dd9bf ID |
127 | con->v1.out_kvec[index].iov_len = size; |
128 | con->v1.out_kvec[index].iov_base = data; | |
129 | con->v1.out_kvec_left++; | |
130 | con->v1.out_kvec_bytes += size; | |
2f713615 ID |
131 | } |
132 | ||
133 | /* | |
134 | * Chop off a kvec from the end. Return residual number of bytes for | |
135 | * that kvec, i.e. how many bytes would have been written if the kvec | |
136 | * hadn't been nuked. | |
137 | */ | |
138 | static int con_out_kvec_skip(struct ceph_connection *con) | |
139 | { | |
2f713615 ID |
140 | int skip = 0; |
141 | ||
a56dd9bf ID |
142 | if (con->v1.out_kvec_bytes > 0) { |
143 | skip = con->v1.out_kvec_cur[con->v1.out_kvec_left - 1].iov_len; | |
144 | BUG_ON(con->v1.out_kvec_bytes < skip); | |
145 | BUG_ON(!con->v1.out_kvec_left); | |
146 | con->v1.out_kvec_bytes -= skip; | |
147 | con->v1.out_kvec_left--; | |
2f713615 ID |
148 | } |
149 | ||
150 | return skip; | |
151 | } | |
152 | ||
153 | static size_t sizeof_footer(struct ceph_connection *con) | |
154 | { | |
155 | return (con->peer_features & CEPH_FEATURE_MSG_AUTH) ? | |
156 | sizeof(struct ceph_msg_footer) : | |
157 | sizeof(struct ceph_msg_footer_old); | |
158 | } | |
159 | ||
160 | static void prepare_message_data(struct ceph_msg *msg, u32 data_len) | |
161 | { | |
d396f89d JL |
162 | /* Initialize data cursor if it's not a sparse read */ |
163 | if (!msg->sparse_read) | |
164 | ceph_msg_data_cursor_init(&msg->cursor, msg, data_len); | |
2f713615 ID |
165 | } |
166 | ||
167 | /* | |
168 | * Prepare footer for currently outgoing message, and finish things | |
169 | * off. Assumes out_kvec* are already valid.. we just add on to the end. | |
170 | */ | |
171 | static void prepare_write_message_footer(struct ceph_connection *con) | |
172 | { | |
173 | struct ceph_msg *m = con->out_msg; | |
174 | ||
175 | m->footer.flags |= CEPH_MSG_FOOTER_COMPLETE; | |
176 | ||
177 | dout("prepare_write_message_footer %p\n", con); | |
178 | con_out_kvec_add(con, sizeof_footer(con), &m->footer); | |
179 | if (con->peer_features & CEPH_FEATURE_MSG_AUTH) { | |
180 | if (con->ops->sign_message) | |
181 | con->ops->sign_message(m); | |
182 | else | |
183 | m->footer.sig = 0; | |
184 | } else { | |
185 | m->old_footer.flags = m->footer.flags; | |
186 | } | |
a56dd9bf ID |
187 | con->v1.out_more = m->more_to_follow; |
188 | con->v1.out_msg_done = true; | |
2f713615 ID |
189 | } |
190 | ||
191 | /* | |
192 | * Prepare headers for the next outgoing message. | |
193 | */ | |
194 | static void prepare_write_message(struct ceph_connection *con) | |
195 | { | |
196 | struct ceph_msg *m; | |
197 | u32 crc; | |
198 | ||
199 | con_out_kvec_reset(con); | |
a56dd9bf | 200 | con->v1.out_msg_done = false; |
2f713615 ID |
201 | |
202 | /* Sneak an ack in there first? If we can get it into the same | |
203 | * TCP packet that's a good thing. */ | |
204 | if (con->in_seq > con->in_seq_acked) { | |
205 | con->in_seq_acked = con->in_seq; | |
206 | con_out_kvec_add(con, sizeof (tag_ack), &tag_ack); | |
a56dd9bf ID |
207 | con->v1.out_temp_ack = cpu_to_le64(con->in_seq_acked); |
208 | con_out_kvec_add(con, sizeof(con->v1.out_temp_ack), | |
209 | &con->v1.out_temp_ack); | |
2f713615 ID |
210 | } |
211 | ||
212 | ceph_con_get_out_msg(con); | |
213 | m = con->out_msg; | |
214 | ||
215 | dout("prepare_write_message %p seq %lld type %d len %d+%d+%zd\n", | |
216 | m, con->out_seq, le16_to_cpu(m->hdr.type), | |
217 | le32_to_cpu(m->hdr.front_len), le32_to_cpu(m->hdr.middle_len), | |
218 | m->data_length); | |
219 | WARN_ON(m->front.iov_len != le32_to_cpu(m->hdr.front_len)); | |
220 | WARN_ON(m->data_length != le32_to_cpu(m->hdr.data_len)); | |
221 | ||
222 | /* tag + hdr + front + middle */ | |
223 | con_out_kvec_add(con, sizeof (tag_msg), &tag_msg); | |
a56dd9bf | 224 | con_out_kvec_add(con, sizeof(con->v1.out_hdr), &con->v1.out_hdr); |
2f713615 ID |
225 | con_out_kvec_add(con, m->front.iov_len, m->front.iov_base); |
226 | ||
227 | if (m->middle) | |
228 | con_out_kvec_add(con, m->middle->vec.iov_len, | |
229 | m->middle->vec.iov_base); | |
230 | ||
231 | /* fill in hdr crc and finalize hdr */ | |
232 | crc = crc32c(0, &m->hdr, offsetof(struct ceph_msg_header, crc)); | |
233 | con->out_msg->hdr.crc = cpu_to_le32(crc); | |
a56dd9bf | 234 | memcpy(&con->v1.out_hdr, &con->out_msg->hdr, sizeof(con->v1.out_hdr)); |
2f713615 ID |
235 | |
236 | /* fill in front and middle crc, footer */ | |
237 | crc = crc32c(0, m->front.iov_base, m->front.iov_len); | |
238 | con->out_msg->footer.front_crc = cpu_to_le32(crc); | |
239 | if (m->middle) { | |
240 | crc = crc32c(0, m->middle->vec.iov_base, | |
241 | m->middle->vec.iov_len); | |
242 | con->out_msg->footer.middle_crc = cpu_to_le32(crc); | |
243 | } else | |
244 | con->out_msg->footer.middle_crc = 0; | |
245 | dout("%s front_crc %u middle_crc %u\n", __func__, | |
246 | le32_to_cpu(con->out_msg->footer.front_crc), | |
247 | le32_to_cpu(con->out_msg->footer.middle_crc)); | |
248 | con->out_msg->footer.flags = 0; | |
249 | ||
250 | /* is there a data payload? */ | |
251 | con->out_msg->footer.data_crc = 0; | |
252 | if (m->data_length) { | |
253 | prepare_message_data(con->out_msg, m->data_length); | |
a56dd9bf | 254 | con->v1.out_more = 1; /* data + footer will follow */ |
2f713615 ID |
255 | } else { |
256 | /* no, queue up footer too and be done */ | |
257 | prepare_write_message_footer(con); | |
258 | } | |
259 | ||
260 | ceph_con_flag_set(con, CEPH_CON_F_WRITE_PENDING); | |
261 | } | |
262 | ||
263 | /* | |
264 | * Prepare an ack. | |
265 | */ | |
266 | static void prepare_write_ack(struct ceph_connection *con) | |
267 | { | |
268 | dout("prepare_write_ack %p %llu -> %llu\n", con, | |
269 | con->in_seq_acked, con->in_seq); | |
270 | con->in_seq_acked = con->in_seq; | |
271 | ||
272 | con_out_kvec_reset(con); | |
273 | ||
274 | con_out_kvec_add(con, sizeof (tag_ack), &tag_ack); | |
275 | ||
a56dd9bf ID |
276 | con->v1.out_temp_ack = cpu_to_le64(con->in_seq_acked); |
277 | con_out_kvec_add(con, sizeof(con->v1.out_temp_ack), | |
278 | &con->v1.out_temp_ack); | |
2f713615 | 279 | |
a56dd9bf | 280 | con->v1.out_more = 1; /* more will follow.. eventually.. */ |
2f713615 ID |
281 | ceph_con_flag_set(con, CEPH_CON_F_WRITE_PENDING); |
282 | } | |
283 | ||
284 | /* | |
285 | * Prepare to share the seq during handshake | |
286 | */ | |
287 | static void prepare_write_seq(struct ceph_connection *con) | |
288 | { | |
289 | dout("prepare_write_seq %p %llu -> %llu\n", con, | |
290 | con->in_seq_acked, con->in_seq); | |
291 | con->in_seq_acked = con->in_seq; | |
292 | ||
293 | con_out_kvec_reset(con); | |
294 | ||
a56dd9bf ID |
295 | con->v1.out_temp_ack = cpu_to_le64(con->in_seq_acked); |
296 | con_out_kvec_add(con, sizeof(con->v1.out_temp_ack), | |
297 | &con->v1.out_temp_ack); | |
2f713615 ID |
298 | |
299 | ceph_con_flag_set(con, CEPH_CON_F_WRITE_PENDING); | |
300 | } | |
301 | ||
302 | /* | |
303 | * Prepare to write keepalive byte. | |
304 | */ | |
305 | static void prepare_write_keepalive(struct ceph_connection *con) | |
306 | { | |
307 | dout("prepare_write_keepalive %p\n", con); | |
308 | con_out_kvec_reset(con); | |
309 | if (con->peer_features & CEPH_FEATURE_MSGR_KEEPALIVE2) { | |
310 | struct timespec64 now; | |
311 | ||
312 | ktime_get_real_ts64(&now); | |
313 | con_out_kvec_add(con, sizeof(tag_keepalive2), &tag_keepalive2); | |
a56dd9bf ID |
314 | ceph_encode_timespec64(&con->v1.out_temp_keepalive2, &now); |
315 | con_out_kvec_add(con, sizeof(con->v1.out_temp_keepalive2), | |
316 | &con->v1.out_temp_keepalive2); | |
2f713615 ID |
317 | } else { |
318 | con_out_kvec_add(con, sizeof(tag_keepalive), &tag_keepalive); | |
319 | } | |
320 | ceph_con_flag_set(con, CEPH_CON_F_WRITE_PENDING); | |
321 | } | |
322 | ||
323 | /* | |
324 | * Connection negotiation. | |
325 | */ | |
326 | ||
327 | static int get_connect_authorizer(struct ceph_connection *con) | |
328 | { | |
329 | struct ceph_auth_handshake *auth; | |
330 | int auth_proto; | |
331 | ||
332 | if (!con->ops->get_authorizer) { | |
a56dd9bf ID |
333 | con->v1.auth = NULL; |
334 | con->v1.out_connect.authorizer_protocol = CEPH_AUTH_UNKNOWN; | |
335 | con->v1.out_connect.authorizer_len = 0; | |
2f713615 ID |
336 | return 0; |
337 | } | |
338 | ||
a56dd9bf | 339 | auth = con->ops->get_authorizer(con, &auth_proto, con->v1.auth_retry); |
2f713615 ID |
340 | if (IS_ERR(auth)) |
341 | return PTR_ERR(auth); | |
342 | ||
a56dd9bf ID |
343 | con->v1.auth = auth; |
344 | con->v1.out_connect.authorizer_protocol = cpu_to_le32(auth_proto); | |
345 | con->v1.out_connect.authorizer_len = | |
346 | cpu_to_le32(auth->authorizer_buf_len); | |
2f713615 ID |
347 | return 0; |
348 | } | |
349 | ||
350 | /* | |
351 | * We connected to a peer and are saying hello. | |
352 | */ | |
353 | static void prepare_write_banner(struct ceph_connection *con) | |
354 | { | |
355 | con_out_kvec_add(con, strlen(CEPH_BANNER), CEPH_BANNER); | |
356 | con_out_kvec_add(con, sizeof (con->msgr->my_enc_addr), | |
357 | &con->msgr->my_enc_addr); | |
358 | ||
a56dd9bf | 359 | con->v1.out_more = 0; |
2f713615 ID |
360 | ceph_con_flag_set(con, CEPH_CON_F_WRITE_PENDING); |
361 | } | |
362 | ||
363 | static void __prepare_write_connect(struct ceph_connection *con) | |
364 | { | |
a56dd9bf ID |
365 | con_out_kvec_add(con, sizeof(con->v1.out_connect), |
366 | &con->v1.out_connect); | |
367 | if (con->v1.auth) | |
368 | con_out_kvec_add(con, con->v1.auth->authorizer_buf_len, | |
369 | con->v1.auth->authorizer_buf); | |
2f713615 | 370 | |
a56dd9bf | 371 | con->v1.out_more = 0; |
2f713615 ID |
372 | ceph_con_flag_set(con, CEPH_CON_F_WRITE_PENDING); |
373 | } | |
374 | ||
375 | static int prepare_write_connect(struct ceph_connection *con) | |
376 | { | |
377 | unsigned int global_seq = ceph_get_global_seq(con->msgr, 0); | |
378 | int proto; | |
379 | int ret; | |
380 | ||
381 | switch (con->peer_name.type) { | |
382 | case CEPH_ENTITY_TYPE_MON: | |
383 | proto = CEPH_MONC_PROTOCOL; | |
384 | break; | |
385 | case CEPH_ENTITY_TYPE_OSD: | |
386 | proto = CEPH_OSDC_PROTOCOL; | |
387 | break; | |
388 | case CEPH_ENTITY_TYPE_MDS: | |
389 | proto = CEPH_MDSC_PROTOCOL; | |
390 | break; | |
391 | default: | |
392 | BUG(); | |
393 | } | |
394 | ||
395 | dout("prepare_write_connect %p cseq=%d gseq=%d proto=%d\n", con, | |
a56dd9bf | 396 | con->v1.connect_seq, global_seq, proto); |
2f713615 | 397 | |
a56dd9bf ID |
398 | con->v1.out_connect.features = |
399 | cpu_to_le64(from_msgr(con->msgr)->supported_features); | |
400 | con->v1.out_connect.host_type = cpu_to_le32(CEPH_ENTITY_TYPE_CLIENT); | |
401 | con->v1.out_connect.connect_seq = cpu_to_le32(con->v1.connect_seq); | |
402 | con->v1.out_connect.global_seq = cpu_to_le32(global_seq); | |
403 | con->v1.out_connect.protocol_version = cpu_to_le32(proto); | |
404 | con->v1.out_connect.flags = 0; | |
2f713615 ID |
405 | |
406 | ret = get_connect_authorizer(con); | |
407 | if (ret) | |
408 | return ret; | |
409 | ||
410 | __prepare_write_connect(con); | |
411 | return 0; | |
412 | } | |
413 | ||
414 | /* | |
415 | * write as much of pending kvecs to the socket as we can. | |
416 | * 1 -> done | |
417 | * 0 -> socket full, but more to do | |
418 | * <0 -> error | |
419 | */ | |
420 | static int write_partial_kvec(struct ceph_connection *con) | |
421 | { | |
422 | int ret; | |
423 | ||
a56dd9bf ID |
424 | dout("write_partial_kvec %p %d left\n", con, con->v1.out_kvec_bytes); |
425 | while (con->v1.out_kvec_bytes > 0) { | |
426 | ret = ceph_tcp_sendmsg(con->sock, con->v1.out_kvec_cur, | |
427 | con->v1.out_kvec_left, | |
428 | con->v1.out_kvec_bytes, | |
429 | con->v1.out_more); | |
2f713615 ID |
430 | if (ret <= 0) |
431 | goto out; | |
a56dd9bf ID |
432 | con->v1.out_kvec_bytes -= ret; |
433 | if (!con->v1.out_kvec_bytes) | |
2f713615 ID |
434 | break; /* done */ |
435 | ||
436 | /* account for full iov entries consumed */ | |
a56dd9bf ID |
437 | while (ret >= con->v1.out_kvec_cur->iov_len) { |
438 | BUG_ON(!con->v1.out_kvec_left); | |
439 | ret -= con->v1.out_kvec_cur->iov_len; | |
440 | con->v1.out_kvec_cur++; | |
441 | con->v1.out_kvec_left--; | |
2f713615 ID |
442 | } |
443 | /* and for a partially-consumed entry */ | |
444 | if (ret) { | |
a56dd9bf ID |
445 | con->v1.out_kvec_cur->iov_len -= ret; |
446 | con->v1.out_kvec_cur->iov_base += ret; | |
2f713615 ID |
447 | } |
448 | } | |
a56dd9bf | 449 | con->v1.out_kvec_left = 0; |
2f713615 ID |
450 | ret = 1; |
451 | out: | |
452 | dout("write_partial_kvec %p %d left in %d kvecs ret = %d\n", con, | |
a56dd9bf | 453 | con->v1.out_kvec_bytes, con->v1.out_kvec_left, ret); |
2f713615 ID |
454 | return ret; /* done! */ |
455 | } | |
456 | ||
457 | /* | |
458 | * Write as much message data payload as we can. If we finish, queue | |
459 | * up the footer. | |
460 | * 1 -> done, footer is now queued in out_kvec[]. | |
461 | * 0 -> socket full, but more to do | |
462 | * <0 -> error | |
463 | */ | |
464 | static int write_partial_message_data(struct ceph_connection *con) | |
465 | { | |
466 | struct ceph_msg *msg = con->out_msg; | |
467 | struct ceph_msg_data_cursor *cursor = &msg->cursor; | |
468 | bool do_datacrc = !ceph_test_opt(from_msgr(con->msgr), NOCRC); | |
2f713615 ID |
469 | u32 crc; |
470 | ||
471 | dout("%s %p msg %p\n", __func__, con, msg); | |
472 | ||
473 | if (!msg->num_data_items) | |
474 | return -EINVAL; | |
475 | ||
476 | /* | |
477 | * Iterate through each page that contains data to be | |
478 | * written, and send as much as possible for each. | |
479 | * | |
480 | * If we are calculating the data crc (the default), we will | |
481 | * need to map the page. If we have no pages, they have | |
482 | * been revoked, so use the zero page. | |
483 | */ | |
484 | crc = do_datacrc ? le32_to_cpu(msg->footer.data_crc) : 0; | |
485 | while (cursor->total_resid) { | |
486 | struct page *page; | |
487 | size_t page_offset; | |
488 | size_t length; | |
489 | int ret; | |
490 | ||
491 | if (!cursor->resid) { | |
492 | ceph_msg_data_advance(cursor, 0); | |
493 | continue; | |
494 | } | |
495 | ||
da4ab869 | 496 | page = ceph_msg_data_next(cursor, &page_offset, &length); |
5da4d7b8 DH |
497 | ret = ceph_tcp_sendpage(con->sock, page, page_offset, length, |
498 | MSG_MORE); | |
2f713615 ID |
499 | if (ret <= 0) { |
500 | if (do_datacrc) | |
501 | msg->footer.data_crc = cpu_to_le32(crc); | |
502 | ||
503 | return ret; | |
504 | } | |
505 | if (do_datacrc && cursor->need_crc) | |
506 | crc = ceph_crc32c_page(crc, page, page_offset, length); | |
507 | ceph_msg_data_advance(cursor, (size_t)ret); | |
508 | } | |
509 | ||
510 | dout("%s %p msg %p done\n", __func__, con, msg); | |
511 | ||
512 | /* prepare and queue up footer, too */ | |
513 | if (do_datacrc) | |
514 | msg->footer.data_crc = cpu_to_le32(crc); | |
515 | else | |
516 | msg->footer.flags |= CEPH_MSG_FOOTER_NOCRC; | |
517 | con_out_kvec_reset(con); | |
518 | prepare_write_message_footer(con); | |
519 | ||
520 | return 1; /* must return > 0 to indicate success */ | |
521 | } | |
522 | ||
523 | /* | |
524 | * write some zeros | |
525 | */ | |
526 | static int write_partial_skip(struct ceph_connection *con) | |
527 | { | |
2f713615 ID |
528 | int ret; |
529 | ||
a56dd9bf ID |
530 | dout("%s %p %d left\n", __func__, con, con->v1.out_skip); |
531 | while (con->v1.out_skip > 0) { | |
532 | size_t size = min(con->v1.out_skip, (int)PAGE_SIZE); | |
2f713615 | 533 | |
5da4d7b8 DH |
534 | ret = ceph_tcp_sendpage(con->sock, ceph_zero_page, 0, size, |
535 | MSG_MORE); | |
2f713615 ID |
536 | if (ret <= 0) |
537 | goto out; | |
a56dd9bf | 538 | con->v1.out_skip -= ret; |
2f713615 ID |
539 | } |
540 | ret = 1; | |
541 | out: | |
542 | return ret; | |
543 | } | |
544 | ||
545 | /* | |
546 | * Prepare to read connection handshake, or an ack. | |
547 | */ | |
548 | static void prepare_read_banner(struct ceph_connection *con) | |
549 | { | |
550 | dout("prepare_read_banner %p\n", con); | |
a56dd9bf | 551 | con->v1.in_base_pos = 0; |
2f713615 ID |
552 | } |
553 | ||
554 | static void prepare_read_connect(struct ceph_connection *con) | |
555 | { | |
556 | dout("prepare_read_connect %p\n", con); | |
a56dd9bf | 557 | con->v1.in_base_pos = 0; |
2f713615 ID |
558 | } |
559 | ||
560 | static void prepare_read_ack(struct ceph_connection *con) | |
561 | { | |
562 | dout("prepare_read_ack %p\n", con); | |
a56dd9bf | 563 | con->v1.in_base_pos = 0; |
2f713615 ID |
564 | } |
565 | ||
566 | static void prepare_read_seq(struct ceph_connection *con) | |
567 | { | |
568 | dout("prepare_read_seq %p\n", con); | |
a56dd9bf ID |
569 | con->v1.in_base_pos = 0; |
570 | con->v1.in_tag = CEPH_MSGR_TAG_SEQ; | |
2f713615 ID |
571 | } |
572 | ||
573 | static void prepare_read_tag(struct ceph_connection *con) | |
574 | { | |
575 | dout("prepare_read_tag %p\n", con); | |
a56dd9bf ID |
576 | con->v1.in_base_pos = 0; |
577 | con->v1.in_tag = CEPH_MSGR_TAG_READY; | |
2f713615 ID |
578 | } |
579 | ||
580 | static void prepare_read_keepalive_ack(struct ceph_connection *con) | |
581 | { | |
582 | dout("prepare_read_keepalive_ack %p\n", con); | |
a56dd9bf | 583 | con->v1.in_base_pos = 0; |
2f713615 ID |
584 | } |
585 | ||
586 | /* | |
587 | * Prepare to read a message. | |
588 | */ | |
589 | static int prepare_read_message(struct ceph_connection *con) | |
590 | { | |
591 | dout("prepare_read_message %p\n", con); | |
592 | BUG_ON(con->in_msg != NULL); | |
a56dd9bf | 593 | con->v1.in_base_pos = 0; |
2f713615 ID |
594 | con->in_front_crc = con->in_middle_crc = con->in_data_crc = 0; |
595 | return 0; | |
596 | } | |
597 | ||
598 | static int read_partial(struct ceph_connection *con, | |
599 | int end, int size, void *object) | |
600 | { | |
a56dd9bf ID |
601 | while (con->v1.in_base_pos < end) { |
602 | int left = end - con->v1.in_base_pos; | |
2f713615 ID |
603 | int have = size - left; |
604 | int ret = ceph_tcp_recvmsg(con->sock, object + have, left); | |
605 | if (ret <= 0) | |
606 | return ret; | |
a56dd9bf | 607 | con->v1.in_base_pos += ret; |
2f713615 ID |
608 | } |
609 | return 1; | |
610 | } | |
611 | ||
612 | /* | |
613 | * Read all or part of the connect-side handshake on a new connection | |
614 | */ | |
615 | static int read_partial_banner(struct ceph_connection *con) | |
616 | { | |
617 | int size; | |
618 | int end; | |
619 | int ret; | |
620 | ||
a56dd9bf | 621 | dout("read_partial_banner %p at %d\n", con, con->v1.in_base_pos); |
2f713615 ID |
622 | |
623 | /* peer's banner */ | |
624 | size = strlen(CEPH_BANNER); | |
625 | end = size; | |
a56dd9bf | 626 | ret = read_partial(con, end, size, con->v1.in_banner); |
2f713615 ID |
627 | if (ret <= 0) |
628 | goto out; | |
629 | ||
a56dd9bf | 630 | size = sizeof(con->v1.actual_peer_addr); |
2f713615 | 631 | end += size; |
a56dd9bf | 632 | ret = read_partial(con, end, size, &con->v1.actual_peer_addr); |
2f713615 ID |
633 | if (ret <= 0) |
634 | goto out; | |
a56dd9bf | 635 | ceph_decode_banner_addr(&con->v1.actual_peer_addr); |
2f713615 | 636 | |
a56dd9bf | 637 | size = sizeof(con->v1.peer_addr_for_me); |
2f713615 | 638 | end += size; |
a56dd9bf | 639 | ret = read_partial(con, end, size, &con->v1.peer_addr_for_me); |
2f713615 ID |
640 | if (ret <= 0) |
641 | goto out; | |
a56dd9bf | 642 | ceph_decode_banner_addr(&con->v1.peer_addr_for_me); |
2f713615 ID |
643 | |
644 | out: | |
645 | return ret; | |
646 | } | |
647 | ||
648 | static int read_partial_connect(struct ceph_connection *con) | |
649 | { | |
650 | int size; | |
651 | int end; | |
652 | int ret; | |
653 | ||
a56dd9bf | 654 | dout("read_partial_connect %p at %d\n", con, con->v1.in_base_pos); |
2f713615 | 655 | |
a56dd9bf | 656 | size = sizeof(con->v1.in_reply); |
2f713615 | 657 | end = size; |
a56dd9bf | 658 | ret = read_partial(con, end, size, &con->v1.in_reply); |
2f713615 ID |
659 | if (ret <= 0) |
660 | goto out; | |
661 | ||
a56dd9bf ID |
662 | if (con->v1.auth) { |
663 | size = le32_to_cpu(con->v1.in_reply.authorizer_len); | |
664 | if (size > con->v1.auth->authorizer_reply_buf_len) { | |
2f713615 | 665 | pr_err("authorizer reply too big: %d > %zu\n", size, |
a56dd9bf | 666 | con->v1.auth->authorizer_reply_buf_len); |
2f713615 ID |
667 | ret = -EINVAL; |
668 | goto out; | |
669 | } | |
670 | ||
671 | end += size; | |
672 | ret = read_partial(con, end, size, | |
a56dd9bf | 673 | con->v1.auth->authorizer_reply_buf); |
2f713615 ID |
674 | if (ret <= 0) |
675 | goto out; | |
676 | } | |
677 | ||
678 | dout("read_partial_connect %p tag %d, con_seq = %u, g_seq = %u\n", | |
a56dd9bf ID |
679 | con, con->v1.in_reply.tag, |
680 | le32_to_cpu(con->v1.in_reply.connect_seq), | |
681 | le32_to_cpu(con->v1.in_reply.global_seq)); | |
2f713615 ID |
682 | out: |
683 | return ret; | |
684 | } | |
685 | ||
686 | /* | |
687 | * Verify the hello banner looks okay. | |
688 | */ | |
689 | static int verify_hello(struct ceph_connection *con) | |
690 | { | |
a56dd9bf | 691 | if (memcmp(con->v1.in_banner, CEPH_BANNER, strlen(CEPH_BANNER))) { |
2f713615 ID |
692 | pr_err("connect to %s got bad banner\n", |
693 | ceph_pr_addr(&con->peer_addr)); | |
694 | con->error_msg = "protocol error, bad banner"; | |
695 | return -1; | |
696 | } | |
697 | return 0; | |
698 | } | |
699 | ||
700 | static int process_banner(struct ceph_connection *con) | |
701 | { | |
702 | struct ceph_entity_addr *my_addr = &con->msgr->inst.addr; | |
703 | ||
704 | dout("process_banner on %p\n", con); | |
705 | ||
706 | if (verify_hello(con) < 0) | |
707 | return -1; | |
708 | ||
709 | /* | |
710 | * Make sure the other end is who we wanted. note that the other | |
711 | * end may not yet know their ip address, so if it's 0.0.0.0, give | |
712 | * them the benefit of the doubt. | |
713 | */ | |
a56dd9bf | 714 | if (memcmp(&con->peer_addr, &con->v1.actual_peer_addr, |
2f713615 | 715 | sizeof(con->peer_addr)) != 0 && |
a56dd9bf ID |
716 | !(ceph_addr_is_blank(&con->v1.actual_peer_addr) && |
717 | con->v1.actual_peer_addr.nonce == con->peer_addr.nonce)) { | |
2f713615 ID |
718 | pr_warn("wrong peer, want %s/%u, got %s/%u\n", |
719 | ceph_pr_addr(&con->peer_addr), | |
720 | le32_to_cpu(con->peer_addr.nonce), | |
a56dd9bf ID |
721 | ceph_pr_addr(&con->v1.actual_peer_addr), |
722 | le32_to_cpu(con->v1.actual_peer_addr.nonce)); | |
2f713615 ID |
723 | con->error_msg = "wrong peer at address"; |
724 | return -1; | |
725 | } | |
726 | ||
727 | /* | |
728 | * did we learn our address? | |
729 | */ | |
730 | if (ceph_addr_is_blank(my_addr)) { | |
731 | memcpy(&my_addr->in_addr, | |
a56dd9bf ID |
732 | &con->v1.peer_addr_for_me.in_addr, |
733 | sizeof(con->v1.peer_addr_for_me.in_addr)); | |
2f713615 ID |
734 | ceph_addr_set_port(my_addr, 0); |
735 | ceph_encode_my_addr(con->msgr); | |
736 | dout("process_banner learned my addr is %s\n", | |
737 | ceph_pr_addr(my_addr)); | |
738 | } | |
739 | ||
740 | return 0; | |
741 | } | |
742 | ||
743 | static int process_connect(struct ceph_connection *con) | |
744 | { | |
745 | u64 sup_feat = from_msgr(con->msgr)->supported_features; | |
746 | u64 req_feat = from_msgr(con->msgr)->required_features; | |
a56dd9bf | 747 | u64 server_feat = le64_to_cpu(con->v1.in_reply.features); |
2f713615 ID |
748 | int ret; |
749 | ||
a56dd9bf | 750 | dout("process_connect on %p tag %d\n", con, con->v1.in_tag); |
2f713615 | 751 | |
a56dd9bf ID |
752 | if (con->v1.auth) { |
753 | int len = le32_to_cpu(con->v1.in_reply.authorizer_len); | |
2f713615 ID |
754 | |
755 | /* | |
756 | * Any connection that defines ->get_authorizer() | |
757 | * should also define ->add_authorizer_challenge() and | |
758 | * ->verify_authorizer_reply(). | |
759 | * | |
760 | * See get_connect_authorizer(). | |
761 | */ | |
a56dd9bf ID |
762 | if (con->v1.in_reply.tag == |
763 | CEPH_MSGR_TAG_CHALLENGE_AUTHORIZER) { | |
2f713615 | 764 | ret = con->ops->add_authorizer_challenge( |
a56dd9bf | 765 | con, con->v1.auth->authorizer_reply_buf, len); |
2f713615 ID |
766 | if (ret < 0) |
767 | return ret; | |
768 | ||
769 | con_out_kvec_reset(con); | |
770 | __prepare_write_connect(con); | |
771 | prepare_read_connect(con); | |
772 | return 0; | |
773 | } | |
774 | ||
775 | if (len) { | |
776 | ret = con->ops->verify_authorizer_reply(con); | |
777 | if (ret < 0) { | |
778 | con->error_msg = "bad authorize reply"; | |
779 | return ret; | |
780 | } | |
781 | } | |
782 | } | |
783 | ||
a56dd9bf | 784 | switch (con->v1.in_reply.tag) { |
2f713615 ID |
785 | case CEPH_MSGR_TAG_FEATURES: |
786 | pr_err("%s%lld %s feature set mismatch," | |
787 | " my %llx < server's %llx, missing %llx\n", | |
788 | ENTITY_NAME(con->peer_name), | |
789 | ceph_pr_addr(&con->peer_addr), | |
790 | sup_feat, server_feat, server_feat & ~sup_feat); | |
791 | con->error_msg = "missing required protocol features"; | |
792 | return -1; | |
793 | ||
794 | case CEPH_MSGR_TAG_BADPROTOVER: | |
795 | pr_err("%s%lld %s protocol version mismatch," | |
796 | " my %d != server's %d\n", | |
797 | ENTITY_NAME(con->peer_name), | |
798 | ceph_pr_addr(&con->peer_addr), | |
a56dd9bf ID |
799 | le32_to_cpu(con->v1.out_connect.protocol_version), |
800 | le32_to_cpu(con->v1.in_reply.protocol_version)); | |
2f713615 ID |
801 | con->error_msg = "protocol version mismatch"; |
802 | return -1; | |
803 | ||
804 | case CEPH_MSGR_TAG_BADAUTHORIZER: | |
a56dd9bf | 805 | con->v1.auth_retry++; |
2f713615 | 806 | dout("process_connect %p got BADAUTHORIZER attempt %d\n", con, |
a56dd9bf ID |
807 | con->v1.auth_retry); |
808 | if (con->v1.auth_retry == 2) { | |
2f713615 ID |
809 | con->error_msg = "connect authorization failure"; |
810 | return -1; | |
811 | } | |
812 | con_out_kvec_reset(con); | |
813 | ret = prepare_write_connect(con); | |
814 | if (ret < 0) | |
815 | return ret; | |
816 | prepare_read_connect(con); | |
817 | break; | |
818 | ||
819 | case CEPH_MSGR_TAG_RESETSESSION: | |
820 | /* | |
821 | * If we connected with a large connect_seq but the peer | |
822 | * has no record of a session with us (no connection, or | |
823 | * connect_seq == 0), they will send RESETSESION to indicate | |
824 | * that they must have reset their session, and may have | |
825 | * dropped messages. | |
826 | */ | |
827 | dout("process_connect got RESET peer seq %u\n", | |
a56dd9bf | 828 | le32_to_cpu(con->v1.in_reply.connect_seq)); |
2f713615 ID |
829 | pr_info("%s%lld %s session reset\n", |
830 | ENTITY_NAME(con->peer_name), | |
831 | ceph_pr_addr(&con->peer_addr)); | |
832 | ceph_con_reset_session(con); | |
833 | con_out_kvec_reset(con); | |
834 | ret = prepare_write_connect(con); | |
835 | if (ret < 0) | |
836 | return ret; | |
837 | prepare_read_connect(con); | |
838 | ||
839 | /* Tell ceph about it. */ | |
840 | mutex_unlock(&con->mutex); | |
841 | if (con->ops->peer_reset) | |
842 | con->ops->peer_reset(con); | |
843 | mutex_lock(&con->mutex); | |
844 | if (con->state != CEPH_CON_S_V1_CONNECT_MSG) | |
845 | return -EAGAIN; | |
846 | break; | |
847 | ||
848 | case CEPH_MSGR_TAG_RETRY_SESSION: | |
849 | /* | |
850 | * If we sent a smaller connect_seq than the peer has, try | |
851 | * again with a larger value. | |
852 | */ | |
853 | dout("process_connect got RETRY_SESSION my seq %u, peer %u\n", | |
a56dd9bf ID |
854 | le32_to_cpu(con->v1.out_connect.connect_seq), |
855 | le32_to_cpu(con->v1.in_reply.connect_seq)); | |
856 | con->v1.connect_seq = le32_to_cpu(con->v1.in_reply.connect_seq); | |
2f713615 ID |
857 | con_out_kvec_reset(con); |
858 | ret = prepare_write_connect(con); | |
859 | if (ret < 0) | |
860 | return ret; | |
861 | prepare_read_connect(con); | |
862 | break; | |
863 | ||
864 | case CEPH_MSGR_TAG_RETRY_GLOBAL: | |
865 | /* | |
866 | * If we sent a smaller global_seq than the peer has, try | |
867 | * again with a larger value. | |
868 | */ | |
869 | dout("process_connect got RETRY_GLOBAL my %u peer_gseq %u\n", | |
a56dd9bf ID |
870 | con->v1.peer_global_seq, |
871 | le32_to_cpu(con->v1.in_reply.global_seq)); | |
2f713615 | 872 | ceph_get_global_seq(con->msgr, |
a56dd9bf | 873 | le32_to_cpu(con->v1.in_reply.global_seq)); |
2f713615 ID |
874 | con_out_kvec_reset(con); |
875 | ret = prepare_write_connect(con); | |
876 | if (ret < 0) | |
877 | return ret; | |
878 | prepare_read_connect(con); | |
879 | break; | |
880 | ||
881 | case CEPH_MSGR_TAG_SEQ: | |
882 | case CEPH_MSGR_TAG_READY: | |
883 | if (req_feat & ~server_feat) { | |
884 | pr_err("%s%lld %s protocol feature mismatch," | |
885 | " my required %llx > server's %llx, need %llx\n", | |
886 | ENTITY_NAME(con->peer_name), | |
887 | ceph_pr_addr(&con->peer_addr), | |
888 | req_feat, server_feat, req_feat & ~server_feat); | |
889 | con->error_msg = "missing required protocol features"; | |
890 | return -1; | |
891 | } | |
892 | ||
893 | WARN_ON(con->state != CEPH_CON_S_V1_CONNECT_MSG); | |
894 | con->state = CEPH_CON_S_OPEN; | |
a56dd9bf ID |
895 | con->v1.auth_retry = 0; /* we authenticated; clear flag */ |
896 | con->v1.peer_global_seq = | |
897 | le32_to_cpu(con->v1.in_reply.global_seq); | |
898 | con->v1.connect_seq++; | |
2f713615 ID |
899 | con->peer_features = server_feat; |
900 | dout("process_connect got READY gseq %d cseq %d (%d)\n", | |
a56dd9bf ID |
901 | con->v1.peer_global_seq, |
902 | le32_to_cpu(con->v1.in_reply.connect_seq), | |
903 | con->v1.connect_seq); | |
904 | WARN_ON(con->v1.connect_seq != | |
905 | le32_to_cpu(con->v1.in_reply.connect_seq)); | |
2f713615 | 906 | |
a56dd9bf | 907 | if (con->v1.in_reply.flags & CEPH_MSG_CONNECT_LOSSY) |
2f713615 ID |
908 | ceph_con_flag_set(con, CEPH_CON_F_LOSSYTX); |
909 | ||
910 | con->delay = 0; /* reset backoff memory */ | |
911 | ||
a56dd9bf | 912 | if (con->v1.in_reply.tag == CEPH_MSGR_TAG_SEQ) { |
2f713615 ID |
913 | prepare_write_seq(con); |
914 | prepare_read_seq(con); | |
915 | } else { | |
916 | prepare_read_tag(con); | |
917 | } | |
918 | break; | |
919 | ||
920 | case CEPH_MSGR_TAG_WAIT: | |
921 | /* | |
922 | * If there is a connection race (we are opening | |
923 | * connections to each other), one of us may just have | |
924 | * to WAIT. This shouldn't happen if we are the | |
925 | * client. | |
926 | */ | |
927 | con->error_msg = "protocol error, got WAIT as client"; | |
928 | return -1; | |
929 | ||
930 | default: | |
931 | con->error_msg = "protocol error, garbage tag during connect"; | |
932 | return -1; | |
933 | } | |
934 | return 0; | |
935 | } | |
936 | ||
937 | /* | |
938 | * read (part of) an ack | |
939 | */ | |
940 | static int read_partial_ack(struct ceph_connection *con) | |
941 | { | |
a56dd9bf | 942 | int size = sizeof(con->v1.in_temp_ack); |
2f713615 ID |
943 | int end = size; |
944 | ||
a56dd9bf | 945 | return read_partial(con, end, size, &con->v1.in_temp_ack); |
2f713615 ID |
946 | } |
947 | ||
948 | /* | |
949 | * We can finally discard anything that's been acked. | |
950 | */ | |
951 | static void process_ack(struct ceph_connection *con) | |
952 | { | |
a56dd9bf | 953 | u64 ack = le64_to_cpu(con->v1.in_temp_ack); |
2f713615 | 954 | |
a56dd9bf | 955 | if (con->v1.in_tag == CEPH_MSGR_TAG_ACK) |
2f713615 ID |
956 | ceph_con_discard_sent(con, ack); |
957 | else | |
958 | ceph_con_discard_requeued(con, ack); | |
959 | ||
960 | prepare_read_tag(con); | |
961 | } | |
962 | ||
d396f89d JL |
963 | static int read_partial_message_chunk(struct ceph_connection *con, |
964 | struct kvec *section, | |
965 | unsigned int sec_len, u32 *crc) | |
2f713615 ID |
966 | { |
967 | int ret, left; | |
968 | ||
969 | BUG_ON(!section); | |
970 | ||
971 | while (section->iov_len < sec_len) { | |
972 | BUG_ON(section->iov_base == NULL); | |
973 | left = sec_len - section->iov_len; | |
974 | ret = ceph_tcp_recvmsg(con->sock, (char *)section->iov_base + | |
975 | section->iov_len, left); | |
976 | if (ret <= 0) | |
977 | return ret; | |
978 | section->iov_len += ret; | |
979 | } | |
980 | if (section->iov_len == sec_len) | |
d396f89d JL |
981 | *crc = crc32c(*crc, section->iov_base, section->iov_len); |
982 | ||
983 | return 1; | |
984 | } | |
985 | ||
986 | static inline int read_partial_message_section(struct ceph_connection *con, | |
987 | struct kvec *section, | |
988 | unsigned int sec_len, u32 *crc) | |
989 | { | |
990 | *crc = 0; | |
991 | return read_partial_message_chunk(con, section, sec_len, crc); | |
992 | } | |
993 | ||
994 | static int read_sparse_msg_extent(struct ceph_connection *con, u32 *crc) | |
995 | { | |
996 | struct ceph_msg_data_cursor *cursor = &con->in_msg->cursor; | |
997 | bool do_bounce = ceph_test_opt(from_msgr(con->msgr), RXBOUNCE); | |
2f713615 | 998 | |
d396f89d JL |
999 | if (do_bounce && unlikely(!con->bounce_page)) { |
1000 | con->bounce_page = alloc_page(GFP_NOIO); | |
1001 | if (!con->bounce_page) { | |
1002 | pr_err("failed to allocate bounce page\n"); | |
1003 | return -ENOMEM; | |
1004 | } | |
1005 | } | |
1006 | ||
1007 | while (cursor->sr_resid > 0) { | |
1008 | struct page *page, *rpage; | |
1009 | size_t off, len; | |
1010 | int ret; | |
1011 | ||
1012 | page = ceph_msg_data_next(cursor, &off, &len); | |
1013 | rpage = do_bounce ? con->bounce_page : page; | |
1014 | ||
1015 | /* clamp to what remains in extent */ | |
1016 | len = min_t(int, len, cursor->sr_resid); | |
1017 | ret = ceph_tcp_recvpage(con->sock, rpage, (int)off, len); | |
1018 | if (ret <= 0) | |
1019 | return ret; | |
1020 | *crc = ceph_crc32c_page(*crc, rpage, off, ret); | |
1021 | ceph_msg_data_advance(cursor, (size_t)ret); | |
1022 | cursor->sr_resid -= ret; | |
1023 | if (do_bounce) | |
1024 | memcpy_page(page, off, rpage, off, ret); | |
1025 | } | |
2f713615 ID |
1026 | return 1; |
1027 | } | |
1028 | ||
d396f89d JL |
1029 | static int read_sparse_msg_data(struct ceph_connection *con) |
1030 | { | |
1031 | struct ceph_msg_data_cursor *cursor = &con->in_msg->cursor; | |
1032 | bool do_datacrc = !ceph_test_opt(from_msgr(con->msgr), NOCRC); | |
1033 | u32 crc = 0; | |
1034 | int ret = 1; | |
1035 | ||
1036 | if (do_datacrc) | |
1037 | crc = con->in_data_crc; | |
1038 | ||
1039 | do { | |
1040 | if (con->v1.in_sr_kvec.iov_base) | |
1041 | ret = read_partial_message_chunk(con, | |
1042 | &con->v1.in_sr_kvec, | |
1043 | con->v1.in_sr_len, | |
1044 | &crc); | |
1045 | else if (cursor->sr_resid > 0) | |
1046 | ret = read_sparse_msg_extent(con, &crc); | |
1047 | ||
1048 | if (ret <= 0) { | |
1049 | if (do_datacrc) | |
1050 | con->in_data_crc = crc; | |
1051 | return ret; | |
1052 | } | |
1053 | ||
1054 | memset(&con->v1.in_sr_kvec, 0, sizeof(con->v1.in_sr_kvec)); | |
1055 | ret = con->ops->sparse_read(con, cursor, | |
1056 | (char **)&con->v1.in_sr_kvec.iov_base); | |
1057 | con->v1.in_sr_len = ret; | |
1058 | } while (ret > 0); | |
1059 | ||
1060 | if (do_datacrc) | |
1061 | con->in_data_crc = crc; | |
1062 | ||
1063 | return ret < 0 ? ret : 1; /* must return > 0 to indicate success */ | |
1064 | } | |
1065 | ||
2f713615 ID |
1066 | static int read_partial_msg_data(struct ceph_connection *con) |
1067 | { | |
038b8d1d | 1068 | struct ceph_msg_data_cursor *cursor = &con->in_msg->cursor; |
2f713615 ID |
1069 | bool do_datacrc = !ceph_test_opt(from_msgr(con->msgr), NOCRC); |
1070 | struct page *page; | |
1071 | size_t page_offset; | |
1072 | size_t length; | |
1073 | u32 crc = 0; | |
1074 | int ret; | |
1075 | ||
2f713615 ID |
1076 | if (do_datacrc) |
1077 | crc = con->in_data_crc; | |
1078 | while (cursor->total_resid) { | |
1079 | if (!cursor->resid) { | |
1080 | ceph_msg_data_advance(cursor, 0); | |
1081 | continue; | |
1082 | } | |
1083 | ||
da4ab869 | 1084 | page = ceph_msg_data_next(cursor, &page_offset, &length); |
2f713615 ID |
1085 | ret = ceph_tcp_recvpage(con->sock, page, page_offset, length); |
1086 | if (ret <= 0) { | |
1087 | if (do_datacrc) | |
1088 | con->in_data_crc = crc; | |
1089 | ||
1090 | return ret; | |
1091 | } | |
1092 | ||
1093 | if (do_datacrc) | |
1094 | crc = ceph_crc32c_page(crc, page, page_offset, ret); | |
1095 | ceph_msg_data_advance(cursor, (size_t)ret); | |
1096 | } | |
1097 | if (do_datacrc) | |
1098 | con->in_data_crc = crc; | |
1099 | ||
1100 | return 1; /* must return > 0 to indicate success */ | |
1101 | } | |
1102 | ||
038b8d1d ID |
1103 | static int read_partial_msg_data_bounce(struct ceph_connection *con) |
1104 | { | |
1105 | struct ceph_msg_data_cursor *cursor = &con->in_msg->cursor; | |
1106 | struct page *page; | |
1107 | size_t off, len; | |
1108 | u32 crc; | |
1109 | int ret; | |
1110 | ||
1111 | if (unlikely(!con->bounce_page)) { | |
1112 | con->bounce_page = alloc_page(GFP_NOIO); | |
1113 | if (!con->bounce_page) { | |
1114 | pr_err("failed to allocate bounce page\n"); | |
1115 | return -ENOMEM; | |
1116 | } | |
1117 | } | |
1118 | ||
1119 | crc = con->in_data_crc; | |
1120 | while (cursor->total_resid) { | |
1121 | if (!cursor->resid) { | |
1122 | ceph_msg_data_advance(cursor, 0); | |
1123 | continue; | |
1124 | } | |
1125 | ||
da4ab869 | 1126 | page = ceph_msg_data_next(cursor, &off, &len); |
038b8d1d ID |
1127 | ret = ceph_tcp_recvpage(con->sock, con->bounce_page, 0, len); |
1128 | if (ret <= 0) { | |
1129 | con->in_data_crc = crc; | |
1130 | return ret; | |
1131 | } | |
1132 | ||
1133 | crc = crc32c(crc, page_address(con->bounce_page), ret); | |
1134 | memcpy_to_page(page, off, page_address(con->bounce_page), ret); | |
1135 | ||
1136 | ceph_msg_data_advance(cursor, ret); | |
1137 | } | |
1138 | con->in_data_crc = crc; | |
1139 | ||
1140 | return 1; /* must return > 0 to indicate success */ | |
1141 | } | |
1142 | ||
2f713615 ID |
1143 | /* |
1144 | * read (part of) a message. | |
1145 | */ | |
1146 | static int read_partial_message(struct ceph_connection *con) | |
1147 | { | |
1148 | struct ceph_msg *m = con->in_msg; | |
1149 | int size; | |
1150 | int end; | |
1151 | int ret; | |
1152 | unsigned int front_len, middle_len, data_len; | |
1153 | bool do_datacrc = !ceph_test_opt(from_msgr(con->msgr), NOCRC); | |
1154 | bool need_sign = (con->peer_features & CEPH_FEATURE_MSG_AUTH); | |
1155 | u64 seq; | |
1156 | u32 crc; | |
1157 | ||
1158 | dout("read_partial_message con %p msg %p\n", con, m); | |
1159 | ||
1160 | /* header */ | |
a56dd9bf | 1161 | size = sizeof(con->v1.in_hdr); |
2f713615 | 1162 | end = size; |
a56dd9bf | 1163 | ret = read_partial(con, end, size, &con->v1.in_hdr); |
2f713615 ID |
1164 | if (ret <= 0) |
1165 | return ret; | |
1166 | ||
a56dd9bf ID |
1167 | crc = crc32c(0, &con->v1.in_hdr, offsetof(struct ceph_msg_header, crc)); |
1168 | if (cpu_to_le32(crc) != con->v1.in_hdr.crc) { | |
2f713615 | 1169 | pr_err("read_partial_message bad hdr crc %u != expected %u\n", |
a56dd9bf | 1170 | crc, con->v1.in_hdr.crc); |
2f713615 ID |
1171 | return -EBADMSG; |
1172 | } | |
1173 | ||
a56dd9bf | 1174 | front_len = le32_to_cpu(con->v1.in_hdr.front_len); |
2f713615 ID |
1175 | if (front_len > CEPH_MSG_MAX_FRONT_LEN) |
1176 | return -EIO; | |
a56dd9bf | 1177 | middle_len = le32_to_cpu(con->v1.in_hdr.middle_len); |
2f713615 ID |
1178 | if (middle_len > CEPH_MSG_MAX_MIDDLE_LEN) |
1179 | return -EIO; | |
a56dd9bf | 1180 | data_len = le32_to_cpu(con->v1.in_hdr.data_len); |
2f713615 ID |
1181 | if (data_len > CEPH_MSG_MAX_DATA_LEN) |
1182 | return -EIO; | |
1183 | ||
1184 | /* verify seq# */ | |
a56dd9bf | 1185 | seq = le64_to_cpu(con->v1.in_hdr.seq); |
2f713615 ID |
1186 | if ((s64)seq - (s64)con->in_seq < 1) { |
1187 | pr_info("skipping %s%lld %s seq %lld expected %lld\n", | |
1188 | ENTITY_NAME(con->peer_name), | |
1189 | ceph_pr_addr(&con->peer_addr), | |
1190 | seq, con->in_seq + 1); | |
a56dd9bf ID |
1191 | con->v1.in_base_pos = -front_len - middle_len - data_len - |
1192 | sizeof_footer(con); | |
1193 | con->v1.in_tag = CEPH_MSGR_TAG_READY; | |
2f713615 ID |
1194 | return 1; |
1195 | } else if ((s64)seq - (s64)con->in_seq > 1) { | |
1196 | pr_err("read_partial_message bad seq %lld expected %lld\n", | |
1197 | seq, con->in_seq + 1); | |
1198 | con->error_msg = "bad message sequence # for incoming message"; | |
1199 | return -EBADE; | |
1200 | } | |
1201 | ||
1202 | /* allocate message? */ | |
1203 | if (!con->in_msg) { | |
1204 | int skip = 0; | |
1205 | ||
a56dd9bf | 1206 | dout("got hdr type %d front %d data %d\n", con->v1.in_hdr.type, |
2f713615 | 1207 | front_len, data_len); |
a56dd9bf | 1208 | ret = ceph_con_in_msg_alloc(con, &con->v1.in_hdr, &skip); |
2f713615 ID |
1209 | if (ret < 0) |
1210 | return ret; | |
1211 | ||
9d5ae6f3 | 1212 | BUG_ON((!con->in_msg) ^ skip); |
2f713615 ID |
1213 | if (skip) { |
1214 | /* skip this message */ | |
1215 | dout("alloc_msg said skip message\n"); | |
a56dd9bf ID |
1216 | con->v1.in_base_pos = -front_len - middle_len - |
1217 | data_len - sizeof_footer(con); | |
1218 | con->v1.in_tag = CEPH_MSGR_TAG_READY; | |
2f713615 ID |
1219 | con->in_seq++; |
1220 | return 1; | |
1221 | } | |
1222 | ||
1223 | BUG_ON(!con->in_msg); | |
1224 | BUG_ON(con->in_msg->con != con); | |
1225 | m = con->in_msg; | |
1226 | m->front.iov_len = 0; /* haven't read it yet */ | |
1227 | if (m->middle) | |
1228 | m->middle->vec.iov_len = 0; | |
1229 | ||
1230 | /* prepare for data payload, if any */ | |
1231 | ||
1232 | if (data_len) | |
1233 | prepare_message_data(con->in_msg, data_len); | |
1234 | } | |
1235 | ||
1236 | /* front */ | |
1237 | ret = read_partial_message_section(con, &m->front, front_len, | |
1238 | &con->in_front_crc); | |
1239 | if (ret <= 0) | |
1240 | return ret; | |
1241 | ||
1242 | /* middle */ | |
1243 | if (m->middle) { | |
1244 | ret = read_partial_message_section(con, &m->middle->vec, | |
1245 | middle_len, | |
1246 | &con->in_middle_crc); | |
1247 | if (ret <= 0) | |
1248 | return ret; | |
1249 | } | |
1250 | ||
1251 | /* (page) data */ | |
1252 | if (data_len) { | |
038b8d1d ID |
1253 | if (!m->num_data_items) |
1254 | return -EIO; | |
1255 | ||
d396f89d JL |
1256 | if (m->sparse_read) |
1257 | ret = read_sparse_msg_data(con); | |
1258 | else if (ceph_test_opt(from_msgr(con->msgr), RXBOUNCE)) | |
038b8d1d ID |
1259 | ret = read_partial_msg_data_bounce(con); |
1260 | else | |
1261 | ret = read_partial_msg_data(con); | |
2f713615 ID |
1262 | if (ret <= 0) |
1263 | return ret; | |
1264 | } | |
1265 | ||
1266 | /* footer */ | |
1267 | size = sizeof_footer(con); | |
1268 | end += size; | |
1269 | ret = read_partial(con, end, size, &m->footer); | |
1270 | if (ret <= 0) | |
1271 | return ret; | |
1272 | ||
1273 | if (!need_sign) { | |
1274 | m->footer.flags = m->old_footer.flags; | |
1275 | m->footer.sig = 0; | |
1276 | } | |
1277 | ||
1278 | dout("read_partial_message got msg %p %d (%u) + %d (%u) + %d (%u)\n", | |
1279 | m, front_len, m->footer.front_crc, middle_len, | |
1280 | m->footer.middle_crc, data_len, m->footer.data_crc); | |
1281 | ||
1282 | /* crc ok? */ | |
1283 | if (con->in_front_crc != le32_to_cpu(m->footer.front_crc)) { | |
1284 | pr_err("read_partial_message %p front crc %u != exp. %u\n", | |
1285 | m, con->in_front_crc, m->footer.front_crc); | |
1286 | return -EBADMSG; | |
1287 | } | |
1288 | if (con->in_middle_crc != le32_to_cpu(m->footer.middle_crc)) { | |
1289 | pr_err("read_partial_message %p middle crc %u != exp %u\n", | |
1290 | m, con->in_middle_crc, m->footer.middle_crc); | |
1291 | return -EBADMSG; | |
1292 | } | |
1293 | if (do_datacrc && | |
1294 | (m->footer.flags & CEPH_MSG_FOOTER_NOCRC) == 0 && | |
1295 | con->in_data_crc != le32_to_cpu(m->footer.data_crc)) { | |
1296 | pr_err("read_partial_message %p data crc %u != exp. %u\n", m, | |
1297 | con->in_data_crc, le32_to_cpu(m->footer.data_crc)); | |
1298 | return -EBADMSG; | |
1299 | } | |
1300 | ||
1301 | if (need_sign && con->ops->check_message_signature && | |
1302 | con->ops->check_message_signature(m)) { | |
1303 | pr_err("read_partial_message %p signature check failed\n", m); | |
1304 | return -EBADMSG; | |
1305 | } | |
1306 | ||
1307 | return 1; /* done! */ | |
1308 | } | |
1309 | ||
1310 | static int read_keepalive_ack(struct ceph_connection *con) | |
1311 | { | |
1312 | struct ceph_timespec ceph_ts; | |
1313 | size_t size = sizeof(ceph_ts); | |
1314 | int ret = read_partial(con, size, size, &ceph_ts); | |
1315 | if (ret <= 0) | |
1316 | return ret; | |
1317 | ceph_decode_timespec64(&con->last_keepalive_ack, &ceph_ts); | |
1318 | prepare_read_tag(con); | |
1319 | return 1; | |
1320 | } | |
1321 | ||
1322 | /* | |
1323 | * Read what we can from the socket. | |
1324 | */ | |
1325 | int ceph_con_v1_try_read(struct ceph_connection *con) | |
1326 | { | |
1327 | int ret = -1; | |
1328 | ||
1329 | more: | |
1330 | dout("try_read start %p state %d\n", con, con->state); | |
1331 | if (con->state != CEPH_CON_S_V1_BANNER && | |
1332 | con->state != CEPH_CON_S_V1_CONNECT_MSG && | |
1333 | con->state != CEPH_CON_S_OPEN) | |
1334 | return 0; | |
1335 | ||
1336 | BUG_ON(!con->sock); | |
1337 | ||
a56dd9bf ID |
1338 | dout("try_read tag %d in_base_pos %d\n", con->v1.in_tag, |
1339 | con->v1.in_base_pos); | |
2f713615 ID |
1340 | |
1341 | if (con->state == CEPH_CON_S_V1_BANNER) { | |
1342 | ret = read_partial_banner(con); | |
1343 | if (ret <= 0) | |
1344 | goto out; | |
1345 | ret = process_banner(con); | |
1346 | if (ret < 0) | |
1347 | goto out; | |
1348 | ||
1349 | con->state = CEPH_CON_S_V1_CONNECT_MSG; | |
1350 | ||
1351 | /* | |
1352 | * Received banner is good, exchange connection info. | |
1353 | * Do not reset out_kvec, as sending our banner raced | |
1354 | * with receiving peer banner after connect completed. | |
1355 | */ | |
1356 | ret = prepare_write_connect(con); | |
1357 | if (ret < 0) | |
1358 | goto out; | |
1359 | prepare_read_connect(con); | |
1360 | ||
1361 | /* Send connection info before awaiting response */ | |
1362 | goto out; | |
1363 | } | |
1364 | ||
1365 | if (con->state == CEPH_CON_S_V1_CONNECT_MSG) { | |
1366 | ret = read_partial_connect(con); | |
1367 | if (ret <= 0) | |
1368 | goto out; | |
1369 | ret = process_connect(con); | |
1370 | if (ret < 0) | |
1371 | goto out; | |
1372 | goto more; | |
1373 | } | |
1374 | ||
1375 | WARN_ON(con->state != CEPH_CON_S_OPEN); | |
1376 | ||
a56dd9bf | 1377 | if (con->v1.in_base_pos < 0) { |
2f713615 ID |
1378 | /* |
1379 | * skipping + discarding content. | |
1380 | */ | |
a56dd9bf | 1381 | ret = ceph_tcp_recvmsg(con->sock, NULL, -con->v1.in_base_pos); |
2f713615 ID |
1382 | if (ret <= 0) |
1383 | goto out; | |
a56dd9bf ID |
1384 | dout("skipped %d / %d bytes\n", ret, -con->v1.in_base_pos); |
1385 | con->v1.in_base_pos += ret; | |
1386 | if (con->v1.in_base_pos) | |
2f713615 ID |
1387 | goto more; |
1388 | } | |
a56dd9bf | 1389 | if (con->v1.in_tag == CEPH_MSGR_TAG_READY) { |
2f713615 ID |
1390 | /* |
1391 | * what's next? | |
1392 | */ | |
a56dd9bf | 1393 | ret = ceph_tcp_recvmsg(con->sock, &con->v1.in_tag, 1); |
2f713615 ID |
1394 | if (ret <= 0) |
1395 | goto out; | |
a56dd9bf ID |
1396 | dout("try_read got tag %d\n", con->v1.in_tag); |
1397 | switch (con->v1.in_tag) { | |
2f713615 ID |
1398 | case CEPH_MSGR_TAG_MSG: |
1399 | prepare_read_message(con); | |
1400 | break; | |
1401 | case CEPH_MSGR_TAG_ACK: | |
1402 | prepare_read_ack(con); | |
1403 | break; | |
1404 | case CEPH_MSGR_TAG_KEEPALIVE2_ACK: | |
1405 | prepare_read_keepalive_ack(con); | |
1406 | break; | |
1407 | case CEPH_MSGR_TAG_CLOSE: | |
1408 | ceph_con_close_socket(con); | |
1409 | con->state = CEPH_CON_S_CLOSED; | |
1410 | goto out; | |
1411 | default: | |
1412 | goto bad_tag; | |
1413 | } | |
1414 | } | |
a56dd9bf | 1415 | if (con->v1.in_tag == CEPH_MSGR_TAG_MSG) { |
2f713615 ID |
1416 | ret = read_partial_message(con); |
1417 | if (ret <= 0) { | |
1418 | switch (ret) { | |
1419 | case -EBADMSG: | |
1420 | con->error_msg = "bad crc/signature"; | |
1421 | fallthrough; | |
1422 | case -EBADE: | |
1423 | ret = -EIO; | |
1424 | break; | |
1425 | case -EIO: | |
1426 | con->error_msg = "io error"; | |
1427 | break; | |
1428 | } | |
1429 | goto out; | |
1430 | } | |
a56dd9bf | 1431 | if (con->v1.in_tag == CEPH_MSGR_TAG_READY) |
2f713615 ID |
1432 | goto more; |
1433 | ceph_con_process_message(con); | |
1434 | if (con->state == CEPH_CON_S_OPEN) | |
1435 | prepare_read_tag(con); | |
1436 | goto more; | |
1437 | } | |
a56dd9bf ID |
1438 | if (con->v1.in_tag == CEPH_MSGR_TAG_ACK || |
1439 | con->v1.in_tag == CEPH_MSGR_TAG_SEQ) { | |
2f713615 ID |
1440 | /* |
1441 | * the final handshake seq exchange is semantically | |
1442 | * equivalent to an ACK | |
1443 | */ | |
1444 | ret = read_partial_ack(con); | |
1445 | if (ret <= 0) | |
1446 | goto out; | |
1447 | process_ack(con); | |
1448 | goto more; | |
1449 | } | |
a56dd9bf | 1450 | if (con->v1.in_tag == CEPH_MSGR_TAG_KEEPALIVE2_ACK) { |
2f713615 ID |
1451 | ret = read_keepalive_ack(con); |
1452 | if (ret <= 0) | |
1453 | goto out; | |
1454 | goto more; | |
1455 | } | |
1456 | ||
1457 | out: | |
1458 | dout("try_read done on %p ret %d\n", con, ret); | |
1459 | return ret; | |
1460 | ||
1461 | bad_tag: | |
a56dd9bf | 1462 | pr_err("try_read bad tag %d\n", con->v1.in_tag); |
2f713615 ID |
1463 | con->error_msg = "protocol error, garbage tag"; |
1464 | ret = -1; | |
1465 | goto out; | |
1466 | } | |
1467 | ||
1468 | /* | |
1469 | * Write something to the socket. Called in a worker thread when the | |
1470 | * socket appears to be writeable and we have something ready to send. | |
1471 | */ | |
1472 | int ceph_con_v1_try_write(struct ceph_connection *con) | |
1473 | { | |
1474 | int ret = 1; | |
1475 | ||
1476 | dout("try_write start %p state %d\n", con, con->state); | |
1477 | if (con->state != CEPH_CON_S_PREOPEN && | |
1478 | con->state != CEPH_CON_S_V1_BANNER && | |
1479 | con->state != CEPH_CON_S_V1_CONNECT_MSG && | |
1480 | con->state != CEPH_CON_S_OPEN) | |
1481 | return 0; | |
1482 | ||
1483 | /* open the socket first? */ | |
1484 | if (con->state == CEPH_CON_S_PREOPEN) { | |
1485 | BUG_ON(con->sock); | |
1486 | con->state = CEPH_CON_S_V1_BANNER; | |
1487 | ||
1488 | con_out_kvec_reset(con); | |
1489 | prepare_write_banner(con); | |
1490 | prepare_read_banner(con); | |
1491 | ||
1492 | BUG_ON(con->in_msg); | |
a56dd9bf | 1493 | con->v1.in_tag = CEPH_MSGR_TAG_READY; |
2f713615 ID |
1494 | dout("try_write initiating connect on %p new state %d\n", |
1495 | con, con->state); | |
1496 | ret = ceph_tcp_connect(con); | |
1497 | if (ret < 0) { | |
1498 | con->error_msg = "connect error"; | |
1499 | goto out; | |
1500 | } | |
1501 | } | |
1502 | ||
1503 | more: | |
a56dd9bf | 1504 | dout("try_write out_kvec_bytes %d\n", con->v1.out_kvec_bytes); |
2f713615 ID |
1505 | BUG_ON(!con->sock); |
1506 | ||
1507 | /* kvec data queued? */ | |
a56dd9bf | 1508 | if (con->v1.out_kvec_left) { |
2f713615 ID |
1509 | ret = write_partial_kvec(con); |
1510 | if (ret <= 0) | |
1511 | goto out; | |
1512 | } | |
a56dd9bf | 1513 | if (con->v1.out_skip) { |
2f713615 ID |
1514 | ret = write_partial_skip(con); |
1515 | if (ret <= 0) | |
1516 | goto out; | |
1517 | } | |
1518 | ||
1519 | /* msg pages? */ | |
1520 | if (con->out_msg) { | |
a56dd9bf | 1521 | if (con->v1.out_msg_done) { |
2f713615 ID |
1522 | ceph_msg_put(con->out_msg); |
1523 | con->out_msg = NULL; /* we're done with this one */ | |
1524 | goto do_next; | |
1525 | } | |
1526 | ||
1527 | ret = write_partial_message_data(con); | |
1528 | if (ret == 1) | |
1529 | goto more; /* we need to send the footer, too! */ | |
1530 | if (ret == 0) | |
1531 | goto out; | |
1532 | if (ret < 0) { | |
1533 | dout("try_write write_partial_message_data err %d\n", | |
1534 | ret); | |
1535 | goto out; | |
1536 | } | |
1537 | } | |
1538 | ||
1539 | do_next: | |
1540 | if (con->state == CEPH_CON_S_OPEN) { | |
1541 | if (ceph_con_flag_test_and_clear(con, | |
1542 | CEPH_CON_F_KEEPALIVE_PENDING)) { | |
1543 | prepare_write_keepalive(con); | |
1544 | goto more; | |
1545 | } | |
1546 | /* is anything else pending? */ | |
1547 | if (!list_empty(&con->out_queue)) { | |
1548 | prepare_write_message(con); | |
1549 | goto more; | |
1550 | } | |
1551 | if (con->in_seq > con->in_seq_acked) { | |
1552 | prepare_write_ack(con); | |
1553 | goto more; | |
1554 | } | |
1555 | } | |
1556 | ||
1557 | /* Nothing to do! */ | |
1558 | ceph_con_flag_clear(con, CEPH_CON_F_WRITE_PENDING); | |
1559 | dout("try_write nothing else to write.\n"); | |
1560 | ret = 0; | |
1561 | out: | |
1562 | dout("try_write done on %p ret %d\n", con, ret); | |
1563 | return ret; | |
1564 | } | |
1565 | ||
1566 | void ceph_con_v1_revoke(struct ceph_connection *con) | |
1567 | { | |
1568 | struct ceph_msg *msg = con->out_msg; | |
1569 | ||
a56dd9bf | 1570 | WARN_ON(con->v1.out_skip); |
2f713615 | 1571 | /* footer */ |
a56dd9bf ID |
1572 | if (con->v1.out_msg_done) { |
1573 | con->v1.out_skip += con_out_kvec_skip(con); | |
2f713615 ID |
1574 | } else { |
1575 | WARN_ON(!msg->data_length); | |
a56dd9bf | 1576 | con->v1.out_skip += sizeof_footer(con); |
2f713615 ID |
1577 | } |
1578 | /* data, middle, front */ | |
1579 | if (msg->data_length) | |
a56dd9bf | 1580 | con->v1.out_skip += msg->cursor.total_resid; |
2f713615 | 1581 | if (msg->middle) |
a56dd9bf ID |
1582 | con->v1.out_skip += con_out_kvec_skip(con); |
1583 | con->v1.out_skip += con_out_kvec_skip(con); | |
2f713615 ID |
1584 | |
1585 | dout("%s con %p out_kvec_bytes %d out_skip %d\n", __func__, con, | |
a56dd9bf | 1586 | con->v1.out_kvec_bytes, con->v1.out_skip); |
2f713615 ID |
1587 | } |
1588 | ||
1589 | void ceph_con_v1_revoke_incoming(struct ceph_connection *con) | |
1590 | { | |
a56dd9bf ID |
1591 | unsigned int front_len = le32_to_cpu(con->v1.in_hdr.front_len); |
1592 | unsigned int middle_len = le32_to_cpu(con->v1.in_hdr.middle_len); | |
1593 | unsigned int data_len = le32_to_cpu(con->v1.in_hdr.data_len); | |
2f713615 ID |
1594 | |
1595 | /* skip rest of message */ | |
a56dd9bf | 1596 | con->v1.in_base_pos = con->v1.in_base_pos - |
2f713615 ID |
1597 | sizeof(struct ceph_msg_header) - |
1598 | front_len - | |
1599 | middle_len - | |
1600 | data_len - | |
1601 | sizeof(struct ceph_msg_footer); | |
1602 | ||
a56dd9bf | 1603 | con->v1.in_tag = CEPH_MSGR_TAG_READY; |
2f713615 ID |
1604 | con->in_seq++; |
1605 | ||
a56dd9bf | 1606 | dout("%s con %p in_base_pos %d\n", __func__, con, con->v1.in_base_pos); |
2f713615 ID |
1607 | } |
1608 | ||
1609 | bool ceph_con_v1_opened(struct ceph_connection *con) | |
1610 | { | |
a56dd9bf | 1611 | return con->v1.connect_seq; |
2f713615 ID |
1612 | } |
1613 | ||
1614 | void ceph_con_v1_reset_session(struct ceph_connection *con) | |
1615 | { | |
a56dd9bf ID |
1616 | con->v1.connect_seq = 0; |
1617 | con->v1.peer_global_seq = 0; | |
2f713615 ID |
1618 | } |
1619 | ||
1620 | void ceph_con_v1_reset_protocol(struct ceph_connection *con) | |
1621 | { | |
a56dd9bf | 1622 | con->v1.out_skip = 0; |
2f713615 | 1623 | } |