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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 | 162 | /* Initialize data cursor if it's not a sparse read */ |
8e46a2d0 XL |
163 | u64 len = msg->sparse_read_total ? : data_len; |
164 | ||
165 | ceph_msg_data_cursor_init(&msg->cursor, msg, len); | |
2f713615 ID |
166 | } |
167 | ||
168 | /* | |
169 | * Prepare footer for currently outgoing message, and finish things | |
170 | * off. Assumes out_kvec* are already valid.. we just add on to the end. | |
171 | */ | |
172 | static void prepare_write_message_footer(struct ceph_connection *con) | |
173 | { | |
174 | struct ceph_msg *m = con->out_msg; | |
175 | ||
176 | m->footer.flags |= CEPH_MSG_FOOTER_COMPLETE; | |
177 | ||
178 | dout("prepare_write_message_footer %p\n", con); | |
179 | con_out_kvec_add(con, sizeof_footer(con), &m->footer); | |
180 | if (con->peer_features & CEPH_FEATURE_MSG_AUTH) { | |
181 | if (con->ops->sign_message) | |
182 | con->ops->sign_message(m); | |
183 | else | |
184 | m->footer.sig = 0; | |
185 | } else { | |
186 | m->old_footer.flags = m->footer.flags; | |
187 | } | |
a56dd9bf ID |
188 | con->v1.out_more = m->more_to_follow; |
189 | con->v1.out_msg_done = true; | |
2f713615 ID |
190 | } |
191 | ||
192 | /* | |
193 | * Prepare headers for the next outgoing message. | |
194 | */ | |
195 | static void prepare_write_message(struct ceph_connection *con) | |
196 | { | |
197 | struct ceph_msg *m; | |
198 | u32 crc; | |
199 | ||
200 | con_out_kvec_reset(con); | |
a56dd9bf | 201 | con->v1.out_msg_done = false; |
2f713615 ID |
202 | |
203 | /* Sneak an ack in there first? If we can get it into the same | |
204 | * TCP packet that's a good thing. */ | |
205 | if (con->in_seq > con->in_seq_acked) { | |
206 | con->in_seq_acked = con->in_seq; | |
207 | con_out_kvec_add(con, sizeof (tag_ack), &tag_ack); | |
a56dd9bf ID |
208 | con->v1.out_temp_ack = cpu_to_le64(con->in_seq_acked); |
209 | con_out_kvec_add(con, sizeof(con->v1.out_temp_ack), | |
210 | &con->v1.out_temp_ack); | |
2f713615 ID |
211 | } |
212 | ||
213 | ceph_con_get_out_msg(con); | |
214 | m = con->out_msg; | |
215 | ||
216 | dout("prepare_write_message %p seq %lld type %d len %d+%d+%zd\n", | |
217 | m, con->out_seq, le16_to_cpu(m->hdr.type), | |
218 | le32_to_cpu(m->hdr.front_len), le32_to_cpu(m->hdr.middle_len), | |
219 | m->data_length); | |
220 | WARN_ON(m->front.iov_len != le32_to_cpu(m->hdr.front_len)); | |
221 | WARN_ON(m->data_length != le32_to_cpu(m->hdr.data_len)); | |
222 | ||
223 | /* tag + hdr + front + middle */ | |
224 | con_out_kvec_add(con, sizeof (tag_msg), &tag_msg); | |
a56dd9bf | 225 | con_out_kvec_add(con, sizeof(con->v1.out_hdr), &con->v1.out_hdr); |
2f713615 ID |
226 | con_out_kvec_add(con, m->front.iov_len, m->front.iov_base); |
227 | ||
228 | if (m->middle) | |
229 | con_out_kvec_add(con, m->middle->vec.iov_len, | |
230 | m->middle->vec.iov_base); | |
231 | ||
232 | /* fill in hdr crc and finalize hdr */ | |
233 | crc = crc32c(0, &m->hdr, offsetof(struct ceph_msg_header, crc)); | |
234 | con->out_msg->hdr.crc = cpu_to_le32(crc); | |
a56dd9bf | 235 | memcpy(&con->v1.out_hdr, &con->out_msg->hdr, sizeof(con->v1.out_hdr)); |
2f713615 ID |
236 | |
237 | /* fill in front and middle crc, footer */ | |
238 | crc = crc32c(0, m->front.iov_base, m->front.iov_len); | |
239 | con->out_msg->footer.front_crc = cpu_to_le32(crc); | |
240 | if (m->middle) { | |
241 | crc = crc32c(0, m->middle->vec.iov_base, | |
242 | m->middle->vec.iov_len); | |
243 | con->out_msg->footer.middle_crc = cpu_to_le32(crc); | |
244 | } else | |
245 | con->out_msg->footer.middle_crc = 0; | |
246 | dout("%s front_crc %u middle_crc %u\n", __func__, | |
247 | le32_to_cpu(con->out_msg->footer.front_crc), | |
248 | le32_to_cpu(con->out_msg->footer.middle_crc)); | |
249 | con->out_msg->footer.flags = 0; | |
250 | ||
251 | /* is there a data payload? */ | |
252 | con->out_msg->footer.data_crc = 0; | |
253 | if (m->data_length) { | |
254 | prepare_message_data(con->out_msg, m->data_length); | |
a56dd9bf | 255 | con->v1.out_more = 1; /* data + footer will follow */ |
2f713615 ID |
256 | } else { |
257 | /* no, queue up footer too and be done */ | |
258 | prepare_write_message_footer(con); | |
259 | } | |
260 | ||
261 | ceph_con_flag_set(con, CEPH_CON_F_WRITE_PENDING); | |
262 | } | |
263 | ||
264 | /* | |
265 | * Prepare an ack. | |
266 | */ | |
267 | static void prepare_write_ack(struct ceph_connection *con) | |
268 | { | |
269 | dout("prepare_write_ack %p %llu -> %llu\n", con, | |
270 | con->in_seq_acked, con->in_seq); | |
271 | con->in_seq_acked = con->in_seq; | |
272 | ||
273 | con_out_kvec_reset(con); | |
274 | ||
275 | con_out_kvec_add(con, sizeof (tag_ack), &tag_ack); | |
276 | ||
a56dd9bf ID |
277 | con->v1.out_temp_ack = cpu_to_le64(con->in_seq_acked); |
278 | con_out_kvec_add(con, sizeof(con->v1.out_temp_ack), | |
279 | &con->v1.out_temp_ack); | |
2f713615 | 280 | |
a56dd9bf | 281 | con->v1.out_more = 1; /* more will follow.. eventually.. */ |
2f713615 ID |
282 | ceph_con_flag_set(con, CEPH_CON_F_WRITE_PENDING); |
283 | } | |
284 | ||
285 | /* | |
286 | * Prepare to share the seq during handshake | |
287 | */ | |
288 | static void prepare_write_seq(struct ceph_connection *con) | |
289 | { | |
290 | dout("prepare_write_seq %p %llu -> %llu\n", con, | |
291 | con->in_seq_acked, con->in_seq); | |
292 | con->in_seq_acked = con->in_seq; | |
293 | ||
294 | con_out_kvec_reset(con); | |
295 | ||
a56dd9bf ID |
296 | con->v1.out_temp_ack = cpu_to_le64(con->in_seq_acked); |
297 | con_out_kvec_add(con, sizeof(con->v1.out_temp_ack), | |
298 | &con->v1.out_temp_ack); | |
2f713615 ID |
299 | |
300 | ceph_con_flag_set(con, CEPH_CON_F_WRITE_PENDING); | |
301 | } | |
302 | ||
303 | /* | |
304 | * Prepare to write keepalive byte. | |
305 | */ | |
306 | static void prepare_write_keepalive(struct ceph_connection *con) | |
307 | { | |
308 | dout("prepare_write_keepalive %p\n", con); | |
309 | con_out_kvec_reset(con); | |
310 | if (con->peer_features & CEPH_FEATURE_MSGR_KEEPALIVE2) { | |
311 | struct timespec64 now; | |
312 | ||
313 | ktime_get_real_ts64(&now); | |
314 | con_out_kvec_add(con, sizeof(tag_keepalive2), &tag_keepalive2); | |
a56dd9bf ID |
315 | ceph_encode_timespec64(&con->v1.out_temp_keepalive2, &now); |
316 | con_out_kvec_add(con, sizeof(con->v1.out_temp_keepalive2), | |
317 | &con->v1.out_temp_keepalive2); | |
2f713615 ID |
318 | } else { |
319 | con_out_kvec_add(con, sizeof(tag_keepalive), &tag_keepalive); | |
320 | } | |
321 | ceph_con_flag_set(con, CEPH_CON_F_WRITE_PENDING); | |
322 | } | |
323 | ||
324 | /* | |
325 | * Connection negotiation. | |
326 | */ | |
327 | ||
328 | static int get_connect_authorizer(struct ceph_connection *con) | |
329 | { | |
330 | struct ceph_auth_handshake *auth; | |
331 | int auth_proto; | |
332 | ||
333 | if (!con->ops->get_authorizer) { | |
a56dd9bf ID |
334 | con->v1.auth = NULL; |
335 | con->v1.out_connect.authorizer_protocol = CEPH_AUTH_UNKNOWN; | |
336 | con->v1.out_connect.authorizer_len = 0; | |
2f713615 ID |
337 | return 0; |
338 | } | |
339 | ||
a56dd9bf | 340 | auth = con->ops->get_authorizer(con, &auth_proto, con->v1.auth_retry); |
2f713615 ID |
341 | if (IS_ERR(auth)) |
342 | return PTR_ERR(auth); | |
343 | ||
a56dd9bf ID |
344 | con->v1.auth = auth; |
345 | con->v1.out_connect.authorizer_protocol = cpu_to_le32(auth_proto); | |
346 | con->v1.out_connect.authorizer_len = | |
347 | cpu_to_le32(auth->authorizer_buf_len); | |
2f713615 ID |
348 | return 0; |
349 | } | |
350 | ||
351 | /* | |
352 | * We connected to a peer and are saying hello. | |
353 | */ | |
354 | static void prepare_write_banner(struct ceph_connection *con) | |
355 | { | |
356 | con_out_kvec_add(con, strlen(CEPH_BANNER), CEPH_BANNER); | |
357 | con_out_kvec_add(con, sizeof (con->msgr->my_enc_addr), | |
358 | &con->msgr->my_enc_addr); | |
359 | ||
a56dd9bf | 360 | con->v1.out_more = 0; |
2f713615 ID |
361 | ceph_con_flag_set(con, CEPH_CON_F_WRITE_PENDING); |
362 | } | |
363 | ||
364 | static void __prepare_write_connect(struct ceph_connection *con) | |
365 | { | |
a56dd9bf ID |
366 | con_out_kvec_add(con, sizeof(con->v1.out_connect), |
367 | &con->v1.out_connect); | |
368 | if (con->v1.auth) | |
369 | con_out_kvec_add(con, con->v1.auth->authorizer_buf_len, | |
370 | con->v1.auth->authorizer_buf); | |
2f713615 | 371 | |
a56dd9bf | 372 | con->v1.out_more = 0; |
2f713615 ID |
373 | ceph_con_flag_set(con, CEPH_CON_F_WRITE_PENDING); |
374 | } | |
375 | ||
376 | static int prepare_write_connect(struct ceph_connection *con) | |
377 | { | |
378 | unsigned int global_seq = ceph_get_global_seq(con->msgr, 0); | |
379 | int proto; | |
380 | int ret; | |
381 | ||
382 | switch (con->peer_name.type) { | |
383 | case CEPH_ENTITY_TYPE_MON: | |
384 | proto = CEPH_MONC_PROTOCOL; | |
385 | break; | |
386 | case CEPH_ENTITY_TYPE_OSD: | |
387 | proto = CEPH_OSDC_PROTOCOL; | |
388 | break; | |
389 | case CEPH_ENTITY_TYPE_MDS: | |
390 | proto = CEPH_MDSC_PROTOCOL; | |
391 | break; | |
392 | default: | |
393 | BUG(); | |
394 | } | |
395 | ||
396 | dout("prepare_write_connect %p cseq=%d gseq=%d proto=%d\n", con, | |
a56dd9bf | 397 | con->v1.connect_seq, global_seq, proto); |
2f713615 | 398 | |
a56dd9bf ID |
399 | con->v1.out_connect.features = |
400 | cpu_to_le64(from_msgr(con->msgr)->supported_features); | |
401 | con->v1.out_connect.host_type = cpu_to_le32(CEPH_ENTITY_TYPE_CLIENT); | |
402 | con->v1.out_connect.connect_seq = cpu_to_le32(con->v1.connect_seq); | |
403 | con->v1.out_connect.global_seq = cpu_to_le32(global_seq); | |
404 | con->v1.out_connect.protocol_version = cpu_to_le32(proto); | |
405 | con->v1.out_connect.flags = 0; | |
2f713615 ID |
406 | |
407 | ret = get_connect_authorizer(con); | |
408 | if (ret) | |
409 | return ret; | |
410 | ||
411 | __prepare_write_connect(con); | |
412 | return 0; | |
413 | } | |
414 | ||
415 | /* | |
416 | * write as much of pending kvecs to the socket as we can. | |
417 | * 1 -> done | |
418 | * 0 -> socket full, but more to do | |
419 | * <0 -> error | |
420 | */ | |
421 | static int write_partial_kvec(struct ceph_connection *con) | |
422 | { | |
423 | int ret; | |
424 | ||
a56dd9bf ID |
425 | dout("write_partial_kvec %p %d left\n", con, con->v1.out_kvec_bytes); |
426 | while (con->v1.out_kvec_bytes > 0) { | |
427 | ret = ceph_tcp_sendmsg(con->sock, con->v1.out_kvec_cur, | |
428 | con->v1.out_kvec_left, | |
429 | con->v1.out_kvec_bytes, | |
430 | con->v1.out_more); | |
2f713615 ID |
431 | if (ret <= 0) |
432 | goto out; | |
a56dd9bf ID |
433 | con->v1.out_kvec_bytes -= ret; |
434 | if (!con->v1.out_kvec_bytes) | |
2f713615 ID |
435 | break; /* done */ |
436 | ||
437 | /* account for full iov entries consumed */ | |
a56dd9bf ID |
438 | while (ret >= con->v1.out_kvec_cur->iov_len) { |
439 | BUG_ON(!con->v1.out_kvec_left); | |
440 | ret -= con->v1.out_kvec_cur->iov_len; | |
441 | con->v1.out_kvec_cur++; | |
442 | con->v1.out_kvec_left--; | |
2f713615 ID |
443 | } |
444 | /* and for a partially-consumed entry */ | |
445 | if (ret) { | |
a56dd9bf ID |
446 | con->v1.out_kvec_cur->iov_len -= ret; |
447 | con->v1.out_kvec_cur->iov_base += ret; | |
2f713615 ID |
448 | } |
449 | } | |
a56dd9bf | 450 | con->v1.out_kvec_left = 0; |
2f713615 ID |
451 | ret = 1; |
452 | out: | |
453 | dout("write_partial_kvec %p %d left in %d kvecs ret = %d\n", con, | |
a56dd9bf | 454 | con->v1.out_kvec_bytes, con->v1.out_kvec_left, ret); |
2f713615 ID |
455 | return ret; /* done! */ |
456 | } | |
457 | ||
458 | /* | |
459 | * Write as much message data payload as we can. If we finish, queue | |
460 | * up the footer. | |
461 | * 1 -> done, footer is now queued in out_kvec[]. | |
462 | * 0 -> socket full, but more to do | |
463 | * <0 -> error | |
464 | */ | |
465 | static int write_partial_message_data(struct ceph_connection *con) | |
466 | { | |
467 | struct ceph_msg *msg = con->out_msg; | |
468 | struct ceph_msg_data_cursor *cursor = &msg->cursor; | |
469 | bool do_datacrc = !ceph_test_opt(from_msgr(con->msgr), NOCRC); | |
2f713615 ID |
470 | u32 crc; |
471 | ||
472 | dout("%s %p msg %p\n", __func__, con, msg); | |
473 | ||
474 | if (!msg->num_data_items) | |
475 | return -EINVAL; | |
476 | ||
477 | /* | |
478 | * Iterate through each page that contains data to be | |
479 | * written, and send as much as possible for each. | |
480 | * | |
481 | * If we are calculating the data crc (the default), we will | |
482 | * need to map the page. If we have no pages, they have | |
483 | * been revoked, so use the zero page. | |
484 | */ | |
485 | crc = do_datacrc ? le32_to_cpu(msg->footer.data_crc) : 0; | |
486 | while (cursor->total_resid) { | |
487 | struct page *page; | |
488 | size_t page_offset; | |
489 | size_t length; | |
490 | int ret; | |
491 | ||
492 | if (!cursor->resid) { | |
493 | ceph_msg_data_advance(cursor, 0); | |
494 | continue; | |
495 | } | |
496 | ||
da4ab869 | 497 | page = ceph_msg_data_next(cursor, &page_offset, &length); |
5da4d7b8 DH |
498 | ret = ceph_tcp_sendpage(con->sock, page, page_offset, length, |
499 | MSG_MORE); | |
2f713615 ID |
500 | if (ret <= 0) { |
501 | if (do_datacrc) | |
502 | msg->footer.data_crc = cpu_to_le32(crc); | |
503 | ||
504 | return ret; | |
505 | } | |
506 | if (do_datacrc && cursor->need_crc) | |
507 | crc = ceph_crc32c_page(crc, page, page_offset, length); | |
508 | ceph_msg_data_advance(cursor, (size_t)ret); | |
509 | } | |
510 | ||
511 | dout("%s %p msg %p done\n", __func__, con, msg); | |
512 | ||
513 | /* prepare and queue up footer, too */ | |
514 | if (do_datacrc) | |
515 | msg->footer.data_crc = cpu_to_le32(crc); | |
516 | else | |
517 | msg->footer.flags |= CEPH_MSG_FOOTER_NOCRC; | |
518 | con_out_kvec_reset(con); | |
519 | prepare_write_message_footer(con); | |
520 | ||
521 | return 1; /* must return > 0 to indicate success */ | |
522 | } | |
523 | ||
524 | /* | |
525 | * write some zeros | |
526 | */ | |
527 | static int write_partial_skip(struct ceph_connection *con) | |
528 | { | |
2f713615 ID |
529 | int ret; |
530 | ||
a56dd9bf ID |
531 | dout("%s %p %d left\n", __func__, con, con->v1.out_skip); |
532 | while (con->v1.out_skip > 0) { | |
533 | size_t size = min(con->v1.out_skip, (int)PAGE_SIZE); | |
2f713615 | 534 | |
5da4d7b8 DH |
535 | ret = ceph_tcp_sendpage(con->sock, ceph_zero_page, 0, size, |
536 | MSG_MORE); | |
2f713615 ID |
537 | if (ret <= 0) |
538 | goto out; | |
a56dd9bf | 539 | con->v1.out_skip -= ret; |
2f713615 ID |
540 | } |
541 | ret = 1; | |
542 | out: | |
543 | return ret; | |
544 | } | |
545 | ||
546 | /* | |
547 | * Prepare to read connection handshake, or an ack. | |
548 | */ | |
549 | static void prepare_read_banner(struct ceph_connection *con) | |
550 | { | |
551 | dout("prepare_read_banner %p\n", con); | |
a56dd9bf | 552 | con->v1.in_base_pos = 0; |
2f713615 ID |
553 | } |
554 | ||
555 | static void prepare_read_connect(struct ceph_connection *con) | |
556 | { | |
557 | dout("prepare_read_connect %p\n", con); | |
a56dd9bf | 558 | con->v1.in_base_pos = 0; |
2f713615 ID |
559 | } |
560 | ||
561 | static void prepare_read_ack(struct ceph_connection *con) | |
562 | { | |
563 | dout("prepare_read_ack %p\n", con); | |
a56dd9bf | 564 | con->v1.in_base_pos = 0; |
2f713615 ID |
565 | } |
566 | ||
567 | static void prepare_read_seq(struct ceph_connection *con) | |
568 | { | |
569 | dout("prepare_read_seq %p\n", con); | |
a56dd9bf ID |
570 | con->v1.in_base_pos = 0; |
571 | con->v1.in_tag = CEPH_MSGR_TAG_SEQ; | |
2f713615 ID |
572 | } |
573 | ||
574 | static void prepare_read_tag(struct ceph_connection *con) | |
575 | { | |
576 | dout("prepare_read_tag %p\n", con); | |
a56dd9bf ID |
577 | con->v1.in_base_pos = 0; |
578 | con->v1.in_tag = CEPH_MSGR_TAG_READY; | |
2f713615 ID |
579 | } |
580 | ||
581 | static void prepare_read_keepalive_ack(struct ceph_connection *con) | |
582 | { | |
583 | dout("prepare_read_keepalive_ack %p\n", con); | |
a56dd9bf | 584 | con->v1.in_base_pos = 0; |
2f713615 ID |
585 | } |
586 | ||
587 | /* | |
588 | * Prepare to read a message. | |
589 | */ | |
590 | static int prepare_read_message(struct ceph_connection *con) | |
591 | { | |
592 | dout("prepare_read_message %p\n", con); | |
593 | BUG_ON(con->in_msg != NULL); | |
a56dd9bf | 594 | con->v1.in_base_pos = 0; |
2f713615 ID |
595 | con->in_front_crc = con->in_middle_crc = con->in_data_crc = 0; |
596 | return 0; | |
597 | } | |
598 | ||
599 | static int read_partial(struct ceph_connection *con, | |
600 | int end, int size, void *object) | |
601 | { | |
a56dd9bf ID |
602 | while (con->v1.in_base_pos < end) { |
603 | int left = end - con->v1.in_base_pos; | |
2f713615 ID |
604 | int have = size - left; |
605 | int ret = ceph_tcp_recvmsg(con->sock, object + have, left); | |
606 | if (ret <= 0) | |
607 | return ret; | |
a56dd9bf | 608 | con->v1.in_base_pos += ret; |
2f713615 ID |
609 | } |
610 | return 1; | |
611 | } | |
612 | ||
613 | /* | |
614 | * Read all or part of the connect-side handshake on a new connection | |
615 | */ | |
616 | static int read_partial_banner(struct ceph_connection *con) | |
617 | { | |
618 | int size; | |
619 | int end; | |
620 | int ret; | |
621 | ||
a56dd9bf | 622 | dout("read_partial_banner %p at %d\n", con, con->v1.in_base_pos); |
2f713615 ID |
623 | |
624 | /* peer's banner */ | |
625 | size = strlen(CEPH_BANNER); | |
626 | end = size; | |
a56dd9bf | 627 | ret = read_partial(con, end, size, con->v1.in_banner); |
2f713615 ID |
628 | if (ret <= 0) |
629 | goto out; | |
630 | ||
a56dd9bf | 631 | size = sizeof(con->v1.actual_peer_addr); |
2f713615 | 632 | end += size; |
a56dd9bf | 633 | ret = read_partial(con, end, size, &con->v1.actual_peer_addr); |
2f713615 ID |
634 | if (ret <= 0) |
635 | goto out; | |
a56dd9bf | 636 | ceph_decode_banner_addr(&con->v1.actual_peer_addr); |
2f713615 | 637 | |
a56dd9bf | 638 | size = sizeof(con->v1.peer_addr_for_me); |
2f713615 | 639 | end += size; |
a56dd9bf | 640 | ret = read_partial(con, end, size, &con->v1.peer_addr_for_me); |
2f713615 ID |
641 | if (ret <= 0) |
642 | goto out; | |
a56dd9bf | 643 | ceph_decode_banner_addr(&con->v1.peer_addr_for_me); |
2f713615 ID |
644 | |
645 | out: | |
646 | return ret; | |
647 | } | |
648 | ||
649 | static int read_partial_connect(struct ceph_connection *con) | |
650 | { | |
651 | int size; | |
652 | int end; | |
653 | int ret; | |
654 | ||
a56dd9bf | 655 | dout("read_partial_connect %p at %d\n", con, con->v1.in_base_pos); |
2f713615 | 656 | |
a56dd9bf | 657 | size = sizeof(con->v1.in_reply); |
2f713615 | 658 | end = size; |
a56dd9bf | 659 | ret = read_partial(con, end, size, &con->v1.in_reply); |
2f713615 ID |
660 | if (ret <= 0) |
661 | goto out; | |
662 | ||
a56dd9bf ID |
663 | if (con->v1.auth) { |
664 | size = le32_to_cpu(con->v1.in_reply.authorizer_len); | |
665 | if (size > con->v1.auth->authorizer_reply_buf_len) { | |
2f713615 | 666 | pr_err("authorizer reply too big: %d > %zu\n", size, |
a56dd9bf | 667 | con->v1.auth->authorizer_reply_buf_len); |
2f713615 ID |
668 | ret = -EINVAL; |
669 | goto out; | |
670 | } | |
671 | ||
672 | end += size; | |
673 | ret = read_partial(con, end, size, | |
a56dd9bf | 674 | con->v1.auth->authorizer_reply_buf); |
2f713615 ID |
675 | if (ret <= 0) |
676 | goto out; | |
677 | } | |
678 | ||
679 | dout("read_partial_connect %p tag %d, con_seq = %u, g_seq = %u\n", | |
a56dd9bf ID |
680 | con, con->v1.in_reply.tag, |
681 | le32_to_cpu(con->v1.in_reply.connect_seq), | |
682 | le32_to_cpu(con->v1.in_reply.global_seq)); | |
2f713615 ID |
683 | out: |
684 | return ret; | |
685 | } | |
686 | ||
687 | /* | |
688 | * Verify the hello banner looks okay. | |
689 | */ | |
690 | static int verify_hello(struct ceph_connection *con) | |
691 | { | |
a56dd9bf | 692 | if (memcmp(con->v1.in_banner, CEPH_BANNER, strlen(CEPH_BANNER))) { |
2f713615 ID |
693 | pr_err("connect to %s got bad banner\n", |
694 | ceph_pr_addr(&con->peer_addr)); | |
695 | con->error_msg = "protocol error, bad banner"; | |
696 | return -1; | |
697 | } | |
698 | return 0; | |
699 | } | |
700 | ||
701 | static int process_banner(struct ceph_connection *con) | |
702 | { | |
703 | struct ceph_entity_addr *my_addr = &con->msgr->inst.addr; | |
704 | ||
705 | dout("process_banner on %p\n", con); | |
706 | ||
707 | if (verify_hello(con) < 0) | |
708 | return -1; | |
709 | ||
710 | /* | |
711 | * Make sure the other end is who we wanted. note that the other | |
712 | * end may not yet know their ip address, so if it's 0.0.0.0, give | |
713 | * them the benefit of the doubt. | |
714 | */ | |
a56dd9bf | 715 | if (memcmp(&con->peer_addr, &con->v1.actual_peer_addr, |
2f713615 | 716 | sizeof(con->peer_addr)) != 0 && |
a56dd9bf ID |
717 | !(ceph_addr_is_blank(&con->v1.actual_peer_addr) && |
718 | con->v1.actual_peer_addr.nonce == con->peer_addr.nonce)) { | |
2f713615 ID |
719 | pr_warn("wrong peer, want %s/%u, got %s/%u\n", |
720 | ceph_pr_addr(&con->peer_addr), | |
721 | le32_to_cpu(con->peer_addr.nonce), | |
a56dd9bf ID |
722 | ceph_pr_addr(&con->v1.actual_peer_addr), |
723 | le32_to_cpu(con->v1.actual_peer_addr.nonce)); | |
2f713615 ID |
724 | con->error_msg = "wrong peer at address"; |
725 | return -1; | |
726 | } | |
727 | ||
728 | /* | |
729 | * did we learn our address? | |
730 | */ | |
731 | if (ceph_addr_is_blank(my_addr)) { | |
732 | memcpy(&my_addr->in_addr, | |
a56dd9bf ID |
733 | &con->v1.peer_addr_for_me.in_addr, |
734 | sizeof(con->v1.peer_addr_for_me.in_addr)); | |
2f713615 ID |
735 | ceph_addr_set_port(my_addr, 0); |
736 | ceph_encode_my_addr(con->msgr); | |
737 | dout("process_banner learned my addr is %s\n", | |
738 | ceph_pr_addr(my_addr)); | |
739 | } | |
740 | ||
741 | return 0; | |
742 | } | |
743 | ||
744 | static int process_connect(struct ceph_connection *con) | |
745 | { | |
746 | u64 sup_feat = from_msgr(con->msgr)->supported_features; | |
747 | u64 req_feat = from_msgr(con->msgr)->required_features; | |
a56dd9bf | 748 | u64 server_feat = le64_to_cpu(con->v1.in_reply.features); |
2f713615 ID |
749 | int ret; |
750 | ||
a56dd9bf | 751 | dout("process_connect on %p tag %d\n", con, con->v1.in_tag); |
2f713615 | 752 | |
a56dd9bf ID |
753 | if (con->v1.auth) { |
754 | int len = le32_to_cpu(con->v1.in_reply.authorizer_len); | |
2f713615 ID |
755 | |
756 | /* | |
757 | * Any connection that defines ->get_authorizer() | |
758 | * should also define ->add_authorizer_challenge() and | |
759 | * ->verify_authorizer_reply(). | |
760 | * | |
761 | * See get_connect_authorizer(). | |
762 | */ | |
a56dd9bf ID |
763 | if (con->v1.in_reply.tag == |
764 | CEPH_MSGR_TAG_CHALLENGE_AUTHORIZER) { | |
2f713615 | 765 | ret = con->ops->add_authorizer_challenge( |
a56dd9bf | 766 | con, con->v1.auth->authorizer_reply_buf, len); |
2f713615 ID |
767 | if (ret < 0) |
768 | return ret; | |
769 | ||
770 | con_out_kvec_reset(con); | |
771 | __prepare_write_connect(con); | |
772 | prepare_read_connect(con); | |
773 | return 0; | |
774 | } | |
775 | ||
776 | if (len) { | |
777 | ret = con->ops->verify_authorizer_reply(con); | |
778 | if (ret < 0) { | |
779 | con->error_msg = "bad authorize reply"; | |
780 | return ret; | |
781 | } | |
782 | } | |
783 | } | |
784 | ||
a56dd9bf | 785 | switch (con->v1.in_reply.tag) { |
2f713615 ID |
786 | case CEPH_MSGR_TAG_FEATURES: |
787 | pr_err("%s%lld %s feature set mismatch," | |
788 | " my %llx < server's %llx, missing %llx\n", | |
789 | ENTITY_NAME(con->peer_name), | |
790 | ceph_pr_addr(&con->peer_addr), | |
791 | sup_feat, server_feat, server_feat & ~sup_feat); | |
792 | con->error_msg = "missing required protocol features"; | |
793 | return -1; | |
794 | ||
795 | case CEPH_MSGR_TAG_BADPROTOVER: | |
796 | pr_err("%s%lld %s protocol version mismatch," | |
797 | " my %d != server's %d\n", | |
798 | ENTITY_NAME(con->peer_name), | |
799 | ceph_pr_addr(&con->peer_addr), | |
a56dd9bf ID |
800 | le32_to_cpu(con->v1.out_connect.protocol_version), |
801 | le32_to_cpu(con->v1.in_reply.protocol_version)); | |
2f713615 ID |
802 | con->error_msg = "protocol version mismatch"; |
803 | return -1; | |
804 | ||
805 | case CEPH_MSGR_TAG_BADAUTHORIZER: | |
a56dd9bf | 806 | con->v1.auth_retry++; |
2f713615 | 807 | dout("process_connect %p got BADAUTHORIZER attempt %d\n", con, |
a56dd9bf ID |
808 | con->v1.auth_retry); |
809 | if (con->v1.auth_retry == 2) { | |
2f713615 ID |
810 | con->error_msg = "connect authorization failure"; |
811 | return -1; | |
812 | } | |
813 | con_out_kvec_reset(con); | |
814 | ret = prepare_write_connect(con); | |
815 | if (ret < 0) | |
816 | return ret; | |
817 | prepare_read_connect(con); | |
818 | break; | |
819 | ||
820 | case CEPH_MSGR_TAG_RESETSESSION: | |
821 | /* | |
822 | * If we connected with a large connect_seq but the peer | |
823 | * has no record of a session with us (no connection, or | |
824 | * connect_seq == 0), they will send RESETSESION to indicate | |
825 | * that they must have reset their session, and may have | |
826 | * dropped messages. | |
827 | */ | |
828 | dout("process_connect got RESET peer seq %u\n", | |
a56dd9bf | 829 | le32_to_cpu(con->v1.in_reply.connect_seq)); |
2f713615 ID |
830 | pr_info("%s%lld %s session reset\n", |
831 | ENTITY_NAME(con->peer_name), | |
832 | ceph_pr_addr(&con->peer_addr)); | |
833 | ceph_con_reset_session(con); | |
834 | con_out_kvec_reset(con); | |
835 | ret = prepare_write_connect(con); | |
836 | if (ret < 0) | |
837 | return ret; | |
838 | prepare_read_connect(con); | |
839 | ||
840 | /* Tell ceph about it. */ | |
841 | mutex_unlock(&con->mutex); | |
842 | if (con->ops->peer_reset) | |
843 | con->ops->peer_reset(con); | |
844 | mutex_lock(&con->mutex); | |
845 | if (con->state != CEPH_CON_S_V1_CONNECT_MSG) | |
846 | return -EAGAIN; | |
847 | break; | |
848 | ||
849 | case CEPH_MSGR_TAG_RETRY_SESSION: | |
850 | /* | |
851 | * If we sent a smaller connect_seq than the peer has, try | |
852 | * again with a larger value. | |
853 | */ | |
854 | dout("process_connect got RETRY_SESSION my seq %u, peer %u\n", | |
a56dd9bf ID |
855 | le32_to_cpu(con->v1.out_connect.connect_seq), |
856 | le32_to_cpu(con->v1.in_reply.connect_seq)); | |
857 | con->v1.connect_seq = le32_to_cpu(con->v1.in_reply.connect_seq); | |
2f713615 ID |
858 | con_out_kvec_reset(con); |
859 | ret = prepare_write_connect(con); | |
860 | if (ret < 0) | |
861 | return ret; | |
862 | prepare_read_connect(con); | |
863 | break; | |
864 | ||
865 | case CEPH_MSGR_TAG_RETRY_GLOBAL: | |
866 | /* | |
867 | * If we sent a smaller global_seq than the peer has, try | |
868 | * again with a larger value. | |
869 | */ | |
870 | dout("process_connect got RETRY_GLOBAL my %u peer_gseq %u\n", | |
a56dd9bf ID |
871 | con->v1.peer_global_seq, |
872 | le32_to_cpu(con->v1.in_reply.global_seq)); | |
2f713615 | 873 | ceph_get_global_seq(con->msgr, |
a56dd9bf | 874 | le32_to_cpu(con->v1.in_reply.global_seq)); |
2f713615 ID |
875 | con_out_kvec_reset(con); |
876 | ret = prepare_write_connect(con); | |
877 | if (ret < 0) | |
878 | return ret; | |
879 | prepare_read_connect(con); | |
880 | break; | |
881 | ||
882 | case CEPH_MSGR_TAG_SEQ: | |
883 | case CEPH_MSGR_TAG_READY: | |
884 | if (req_feat & ~server_feat) { | |
885 | pr_err("%s%lld %s protocol feature mismatch," | |
886 | " my required %llx > server's %llx, need %llx\n", | |
887 | ENTITY_NAME(con->peer_name), | |
888 | ceph_pr_addr(&con->peer_addr), | |
889 | req_feat, server_feat, req_feat & ~server_feat); | |
890 | con->error_msg = "missing required protocol features"; | |
891 | return -1; | |
892 | } | |
893 | ||
894 | WARN_ON(con->state != CEPH_CON_S_V1_CONNECT_MSG); | |
895 | con->state = CEPH_CON_S_OPEN; | |
a56dd9bf ID |
896 | con->v1.auth_retry = 0; /* we authenticated; clear flag */ |
897 | con->v1.peer_global_seq = | |
898 | le32_to_cpu(con->v1.in_reply.global_seq); | |
899 | con->v1.connect_seq++; | |
2f713615 ID |
900 | con->peer_features = server_feat; |
901 | dout("process_connect got READY gseq %d cseq %d (%d)\n", | |
a56dd9bf ID |
902 | con->v1.peer_global_seq, |
903 | le32_to_cpu(con->v1.in_reply.connect_seq), | |
904 | con->v1.connect_seq); | |
905 | WARN_ON(con->v1.connect_seq != | |
906 | le32_to_cpu(con->v1.in_reply.connect_seq)); | |
2f713615 | 907 | |
a56dd9bf | 908 | if (con->v1.in_reply.flags & CEPH_MSG_CONNECT_LOSSY) |
2f713615 ID |
909 | ceph_con_flag_set(con, CEPH_CON_F_LOSSYTX); |
910 | ||
911 | con->delay = 0; /* reset backoff memory */ | |
912 | ||
a56dd9bf | 913 | if (con->v1.in_reply.tag == CEPH_MSGR_TAG_SEQ) { |
2f713615 ID |
914 | prepare_write_seq(con); |
915 | prepare_read_seq(con); | |
916 | } else { | |
917 | prepare_read_tag(con); | |
918 | } | |
919 | break; | |
920 | ||
921 | case CEPH_MSGR_TAG_WAIT: | |
922 | /* | |
923 | * If there is a connection race (we are opening | |
924 | * connections to each other), one of us may just have | |
925 | * to WAIT. This shouldn't happen if we are the | |
926 | * client. | |
927 | */ | |
928 | con->error_msg = "protocol error, got WAIT as client"; | |
929 | return -1; | |
930 | ||
931 | default: | |
932 | con->error_msg = "protocol error, garbage tag during connect"; | |
933 | return -1; | |
934 | } | |
935 | return 0; | |
936 | } | |
937 | ||
938 | /* | |
939 | * read (part of) an ack | |
940 | */ | |
941 | static int read_partial_ack(struct ceph_connection *con) | |
942 | { | |
a56dd9bf | 943 | int size = sizeof(con->v1.in_temp_ack); |
2f713615 ID |
944 | int end = size; |
945 | ||
a56dd9bf | 946 | return read_partial(con, end, size, &con->v1.in_temp_ack); |
2f713615 ID |
947 | } |
948 | ||
949 | /* | |
950 | * We can finally discard anything that's been acked. | |
951 | */ | |
952 | static void process_ack(struct ceph_connection *con) | |
953 | { | |
a56dd9bf | 954 | u64 ack = le64_to_cpu(con->v1.in_temp_ack); |
2f713615 | 955 | |
a56dd9bf | 956 | if (con->v1.in_tag == CEPH_MSGR_TAG_ACK) |
2f713615 ID |
957 | ceph_con_discard_sent(con, ack); |
958 | else | |
959 | ceph_con_discard_requeued(con, ack); | |
960 | ||
961 | prepare_read_tag(con); | |
962 | } | |
963 | ||
d396f89d JL |
964 | static int read_partial_message_chunk(struct ceph_connection *con, |
965 | struct kvec *section, | |
966 | unsigned int sec_len, u32 *crc) | |
2f713615 ID |
967 | { |
968 | int ret, left; | |
969 | ||
970 | BUG_ON(!section); | |
971 | ||
972 | while (section->iov_len < sec_len) { | |
973 | BUG_ON(section->iov_base == NULL); | |
974 | left = sec_len - section->iov_len; | |
975 | ret = ceph_tcp_recvmsg(con->sock, (char *)section->iov_base + | |
976 | section->iov_len, left); | |
977 | if (ret <= 0) | |
978 | return ret; | |
979 | section->iov_len += ret; | |
980 | } | |
981 | if (section->iov_len == sec_len) | |
d396f89d JL |
982 | *crc = crc32c(*crc, section->iov_base, section->iov_len); |
983 | ||
984 | return 1; | |
985 | } | |
986 | ||
987 | static inline int read_partial_message_section(struct ceph_connection *con, | |
988 | struct kvec *section, | |
989 | unsigned int sec_len, u32 *crc) | |
990 | { | |
991 | *crc = 0; | |
992 | return read_partial_message_chunk(con, section, sec_len, crc); | |
993 | } | |
994 | ||
ee97302f | 995 | static int read_partial_sparse_msg_extent(struct ceph_connection *con, u32 *crc) |
d396f89d JL |
996 | { |
997 | struct ceph_msg_data_cursor *cursor = &con->in_msg->cursor; | |
998 | bool do_bounce = ceph_test_opt(from_msgr(con->msgr), RXBOUNCE); | |
2f713615 | 999 | |
d396f89d JL |
1000 | if (do_bounce && unlikely(!con->bounce_page)) { |
1001 | con->bounce_page = alloc_page(GFP_NOIO); | |
1002 | if (!con->bounce_page) { | |
1003 | pr_err("failed to allocate bounce page\n"); | |
1004 | return -ENOMEM; | |
1005 | } | |
1006 | } | |
1007 | ||
1008 | while (cursor->sr_resid > 0) { | |
1009 | struct page *page, *rpage; | |
1010 | size_t off, len; | |
1011 | int ret; | |
1012 | ||
1013 | page = ceph_msg_data_next(cursor, &off, &len); | |
1014 | rpage = do_bounce ? con->bounce_page : page; | |
1015 | ||
1016 | /* clamp to what remains in extent */ | |
1017 | len = min_t(int, len, cursor->sr_resid); | |
1018 | ret = ceph_tcp_recvpage(con->sock, rpage, (int)off, len); | |
1019 | if (ret <= 0) | |
1020 | return ret; | |
1021 | *crc = ceph_crc32c_page(*crc, rpage, off, ret); | |
1022 | ceph_msg_data_advance(cursor, (size_t)ret); | |
1023 | cursor->sr_resid -= ret; | |
1024 | if (do_bounce) | |
1025 | memcpy_page(page, off, rpage, off, ret); | |
1026 | } | |
2f713615 ID |
1027 | return 1; |
1028 | } | |
1029 | ||
ee97302f | 1030 | static int read_partial_sparse_msg_data(struct ceph_connection *con) |
d396f89d JL |
1031 | { |
1032 | struct ceph_msg_data_cursor *cursor = &con->in_msg->cursor; | |
1033 | bool do_datacrc = !ceph_test_opt(from_msgr(con->msgr), NOCRC); | |
1034 | u32 crc = 0; | |
1035 | int ret = 1; | |
1036 | ||
1037 | if (do_datacrc) | |
1038 | crc = con->in_data_crc; | |
1039 | ||
8e46a2d0 | 1040 | while (cursor->total_resid) { |
d396f89d JL |
1041 | if (con->v1.in_sr_kvec.iov_base) |
1042 | ret = read_partial_message_chunk(con, | |
1043 | &con->v1.in_sr_kvec, | |
1044 | con->v1.in_sr_len, | |
1045 | &crc); | |
1046 | else if (cursor->sr_resid > 0) | |
ee97302f | 1047 | ret = read_partial_sparse_msg_extent(con, &crc); |
8e46a2d0 XL |
1048 | if (ret <= 0) |
1049 | break; | |
d396f89d JL |
1050 | |
1051 | memset(&con->v1.in_sr_kvec, 0, sizeof(con->v1.in_sr_kvec)); | |
1052 | ret = con->ops->sparse_read(con, cursor, | |
1053 | (char **)&con->v1.in_sr_kvec.iov_base); | |
8e46a2d0 XL |
1054 | if (ret <= 0) { |
1055 | ret = ret ? ret : 1; /* must return > 0 to indicate success */ | |
1056 | break; | |
1057 | } | |
d396f89d | 1058 | con->v1.in_sr_len = ret; |
8e46a2d0 | 1059 | } |
d396f89d JL |
1060 | |
1061 | if (do_datacrc) | |
1062 | con->in_data_crc = crc; | |
1063 | ||
8e46a2d0 | 1064 | return ret; |
d396f89d JL |
1065 | } |
1066 | ||
2f713615 ID |
1067 | static int read_partial_msg_data(struct ceph_connection *con) |
1068 | { | |
038b8d1d | 1069 | struct ceph_msg_data_cursor *cursor = &con->in_msg->cursor; |
2f713615 ID |
1070 | bool do_datacrc = !ceph_test_opt(from_msgr(con->msgr), NOCRC); |
1071 | struct page *page; | |
1072 | size_t page_offset; | |
1073 | size_t length; | |
1074 | u32 crc = 0; | |
1075 | int ret; | |
1076 | ||
2f713615 ID |
1077 | if (do_datacrc) |
1078 | crc = con->in_data_crc; | |
1079 | while (cursor->total_resid) { | |
1080 | if (!cursor->resid) { | |
1081 | ceph_msg_data_advance(cursor, 0); | |
1082 | continue; | |
1083 | } | |
1084 | ||
da4ab869 | 1085 | page = ceph_msg_data_next(cursor, &page_offset, &length); |
2f713615 ID |
1086 | ret = ceph_tcp_recvpage(con->sock, page, page_offset, length); |
1087 | if (ret <= 0) { | |
1088 | if (do_datacrc) | |
1089 | con->in_data_crc = crc; | |
1090 | ||
1091 | return ret; | |
1092 | } | |
1093 | ||
1094 | if (do_datacrc) | |
1095 | crc = ceph_crc32c_page(crc, page, page_offset, ret); | |
1096 | ceph_msg_data_advance(cursor, (size_t)ret); | |
1097 | } | |
1098 | if (do_datacrc) | |
1099 | con->in_data_crc = crc; | |
1100 | ||
1101 | return 1; /* must return > 0 to indicate success */ | |
1102 | } | |
1103 | ||
038b8d1d ID |
1104 | static int read_partial_msg_data_bounce(struct ceph_connection *con) |
1105 | { | |
1106 | struct ceph_msg_data_cursor *cursor = &con->in_msg->cursor; | |
1107 | struct page *page; | |
1108 | size_t off, len; | |
1109 | u32 crc; | |
1110 | int ret; | |
1111 | ||
1112 | if (unlikely(!con->bounce_page)) { | |
1113 | con->bounce_page = alloc_page(GFP_NOIO); | |
1114 | if (!con->bounce_page) { | |
1115 | pr_err("failed to allocate bounce page\n"); | |
1116 | return -ENOMEM; | |
1117 | } | |
1118 | } | |
1119 | ||
1120 | crc = con->in_data_crc; | |
1121 | while (cursor->total_resid) { | |
1122 | if (!cursor->resid) { | |
1123 | ceph_msg_data_advance(cursor, 0); | |
1124 | continue; | |
1125 | } | |
1126 | ||
da4ab869 | 1127 | page = ceph_msg_data_next(cursor, &off, &len); |
038b8d1d ID |
1128 | ret = ceph_tcp_recvpage(con->sock, con->bounce_page, 0, len); |
1129 | if (ret <= 0) { | |
1130 | con->in_data_crc = crc; | |
1131 | return ret; | |
1132 | } | |
1133 | ||
1134 | crc = crc32c(crc, page_address(con->bounce_page), ret); | |
1135 | memcpy_to_page(page, off, page_address(con->bounce_page), ret); | |
1136 | ||
1137 | ceph_msg_data_advance(cursor, ret); | |
1138 | } | |
1139 | con->in_data_crc = crc; | |
1140 | ||
1141 | return 1; /* must return > 0 to indicate success */ | |
1142 | } | |
1143 | ||
2f713615 ID |
1144 | /* |
1145 | * read (part of) a message. | |
1146 | */ | |
1147 | static int read_partial_message(struct ceph_connection *con) | |
1148 | { | |
1149 | struct ceph_msg *m = con->in_msg; | |
1150 | int size; | |
1151 | int end; | |
1152 | int ret; | |
1153 | unsigned int front_len, middle_len, data_len; | |
1154 | bool do_datacrc = !ceph_test_opt(from_msgr(con->msgr), NOCRC); | |
1155 | bool need_sign = (con->peer_features & CEPH_FEATURE_MSG_AUTH); | |
1156 | u64 seq; | |
1157 | u32 crc; | |
1158 | ||
1159 | dout("read_partial_message con %p msg %p\n", con, m); | |
1160 | ||
1161 | /* header */ | |
a56dd9bf | 1162 | size = sizeof(con->v1.in_hdr); |
2f713615 | 1163 | end = size; |
a56dd9bf | 1164 | ret = read_partial(con, end, size, &con->v1.in_hdr); |
2f713615 ID |
1165 | if (ret <= 0) |
1166 | return ret; | |
1167 | ||
a56dd9bf ID |
1168 | crc = crc32c(0, &con->v1.in_hdr, offsetof(struct ceph_msg_header, crc)); |
1169 | if (cpu_to_le32(crc) != con->v1.in_hdr.crc) { | |
2f713615 | 1170 | pr_err("read_partial_message bad hdr crc %u != expected %u\n", |
a56dd9bf | 1171 | crc, con->v1.in_hdr.crc); |
2f713615 ID |
1172 | return -EBADMSG; |
1173 | } | |
1174 | ||
a56dd9bf | 1175 | front_len = le32_to_cpu(con->v1.in_hdr.front_len); |
2f713615 ID |
1176 | if (front_len > CEPH_MSG_MAX_FRONT_LEN) |
1177 | return -EIO; | |
a56dd9bf | 1178 | middle_len = le32_to_cpu(con->v1.in_hdr.middle_len); |
2f713615 ID |
1179 | if (middle_len > CEPH_MSG_MAX_MIDDLE_LEN) |
1180 | return -EIO; | |
a56dd9bf | 1181 | data_len = le32_to_cpu(con->v1.in_hdr.data_len); |
2f713615 ID |
1182 | if (data_len > CEPH_MSG_MAX_DATA_LEN) |
1183 | return -EIO; | |
1184 | ||
1185 | /* verify seq# */ | |
a56dd9bf | 1186 | seq = le64_to_cpu(con->v1.in_hdr.seq); |
2f713615 ID |
1187 | if ((s64)seq - (s64)con->in_seq < 1) { |
1188 | pr_info("skipping %s%lld %s seq %lld expected %lld\n", | |
1189 | ENTITY_NAME(con->peer_name), | |
1190 | ceph_pr_addr(&con->peer_addr), | |
1191 | seq, con->in_seq + 1); | |
a56dd9bf ID |
1192 | con->v1.in_base_pos = -front_len - middle_len - data_len - |
1193 | sizeof_footer(con); | |
1194 | con->v1.in_tag = CEPH_MSGR_TAG_READY; | |
2f713615 ID |
1195 | return 1; |
1196 | } else if ((s64)seq - (s64)con->in_seq > 1) { | |
1197 | pr_err("read_partial_message bad seq %lld expected %lld\n", | |
1198 | seq, con->in_seq + 1); | |
1199 | con->error_msg = "bad message sequence # for incoming message"; | |
1200 | return -EBADE; | |
1201 | } | |
1202 | ||
1203 | /* allocate message? */ | |
1204 | if (!con->in_msg) { | |
1205 | int skip = 0; | |
1206 | ||
a56dd9bf | 1207 | dout("got hdr type %d front %d data %d\n", con->v1.in_hdr.type, |
2f713615 | 1208 | front_len, data_len); |
a56dd9bf | 1209 | ret = ceph_con_in_msg_alloc(con, &con->v1.in_hdr, &skip); |
2f713615 ID |
1210 | if (ret < 0) |
1211 | return ret; | |
1212 | ||
9d5ae6f3 | 1213 | BUG_ON((!con->in_msg) ^ skip); |
2f713615 ID |
1214 | if (skip) { |
1215 | /* skip this message */ | |
1216 | dout("alloc_msg said skip message\n"); | |
a56dd9bf ID |
1217 | con->v1.in_base_pos = -front_len - middle_len - |
1218 | data_len - sizeof_footer(con); | |
1219 | con->v1.in_tag = CEPH_MSGR_TAG_READY; | |
2f713615 ID |
1220 | con->in_seq++; |
1221 | return 1; | |
1222 | } | |
1223 | ||
1224 | BUG_ON(!con->in_msg); | |
1225 | BUG_ON(con->in_msg->con != con); | |
1226 | m = con->in_msg; | |
1227 | m->front.iov_len = 0; /* haven't read it yet */ | |
1228 | if (m->middle) | |
1229 | m->middle->vec.iov_len = 0; | |
1230 | ||
1231 | /* prepare for data payload, if any */ | |
1232 | ||
1233 | if (data_len) | |
1234 | prepare_message_data(con->in_msg, data_len); | |
1235 | } | |
1236 | ||
1237 | /* front */ | |
1238 | ret = read_partial_message_section(con, &m->front, front_len, | |
1239 | &con->in_front_crc); | |
1240 | if (ret <= 0) | |
1241 | return ret; | |
1242 | ||
1243 | /* middle */ | |
1244 | if (m->middle) { | |
1245 | ret = read_partial_message_section(con, &m->middle->vec, | |
1246 | middle_len, | |
1247 | &con->in_middle_crc); | |
1248 | if (ret <= 0) | |
1249 | return ret; | |
1250 | } | |
1251 | ||
1252 | /* (page) data */ | |
1253 | if (data_len) { | |
038b8d1d ID |
1254 | if (!m->num_data_items) |
1255 | return -EIO; | |
1256 | ||
8e46a2d0 | 1257 | if (m->sparse_read_total) |
ee97302f | 1258 | ret = read_partial_sparse_msg_data(con); |
d396f89d | 1259 | else if (ceph_test_opt(from_msgr(con->msgr), RXBOUNCE)) |
038b8d1d ID |
1260 | ret = read_partial_msg_data_bounce(con); |
1261 | else | |
1262 | ret = read_partial_msg_data(con); | |
2f713615 ID |
1263 | if (ret <= 0) |
1264 | return ret; | |
1265 | } | |
1266 | ||
1267 | /* footer */ | |
1268 | size = sizeof_footer(con); | |
1269 | end += size; | |
1270 | ret = read_partial(con, end, size, &m->footer); | |
1271 | if (ret <= 0) | |
1272 | return ret; | |
1273 | ||
1274 | if (!need_sign) { | |
1275 | m->footer.flags = m->old_footer.flags; | |
1276 | m->footer.sig = 0; | |
1277 | } | |
1278 | ||
1279 | dout("read_partial_message got msg %p %d (%u) + %d (%u) + %d (%u)\n", | |
1280 | m, front_len, m->footer.front_crc, middle_len, | |
1281 | m->footer.middle_crc, data_len, m->footer.data_crc); | |
1282 | ||
1283 | /* crc ok? */ | |
1284 | if (con->in_front_crc != le32_to_cpu(m->footer.front_crc)) { | |
1285 | pr_err("read_partial_message %p front crc %u != exp. %u\n", | |
1286 | m, con->in_front_crc, m->footer.front_crc); | |
1287 | return -EBADMSG; | |
1288 | } | |
1289 | if (con->in_middle_crc != le32_to_cpu(m->footer.middle_crc)) { | |
1290 | pr_err("read_partial_message %p middle crc %u != exp %u\n", | |
1291 | m, con->in_middle_crc, m->footer.middle_crc); | |
1292 | return -EBADMSG; | |
1293 | } | |
1294 | if (do_datacrc && | |
1295 | (m->footer.flags & CEPH_MSG_FOOTER_NOCRC) == 0 && | |
1296 | con->in_data_crc != le32_to_cpu(m->footer.data_crc)) { | |
1297 | pr_err("read_partial_message %p data crc %u != exp. %u\n", m, | |
1298 | con->in_data_crc, le32_to_cpu(m->footer.data_crc)); | |
1299 | return -EBADMSG; | |
1300 | } | |
1301 | ||
1302 | if (need_sign && con->ops->check_message_signature && | |
1303 | con->ops->check_message_signature(m)) { | |
1304 | pr_err("read_partial_message %p signature check failed\n", m); | |
1305 | return -EBADMSG; | |
1306 | } | |
1307 | ||
1308 | return 1; /* done! */ | |
1309 | } | |
1310 | ||
1311 | static int read_keepalive_ack(struct ceph_connection *con) | |
1312 | { | |
1313 | struct ceph_timespec ceph_ts; | |
1314 | size_t size = sizeof(ceph_ts); | |
1315 | int ret = read_partial(con, size, size, &ceph_ts); | |
1316 | if (ret <= 0) | |
1317 | return ret; | |
1318 | ceph_decode_timespec64(&con->last_keepalive_ack, &ceph_ts); | |
1319 | prepare_read_tag(con); | |
1320 | return 1; | |
1321 | } | |
1322 | ||
1323 | /* | |
1324 | * Read what we can from the socket. | |
1325 | */ | |
1326 | int ceph_con_v1_try_read(struct ceph_connection *con) | |
1327 | { | |
1328 | int ret = -1; | |
1329 | ||
1330 | more: | |
1331 | dout("try_read start %p state %d\n", con, con->state); | |
1332 | if (con->state != CEPH_CON_S_V1_BANNER && | |
1333 | con->state != CEPH_CON_S_V1_CONNECT_MSG && | |
1334 | con->state != CEPH_CON_S_OPEN) | |
1335 | return 0; | |
1336 | ||
1337 | BUG_ON(!con->sock); | |
1338 | ||
a56dd9bf ID |
1339 | dout("try_read tag %d in_base_pos %d\n", con->v1.in_tag, |
1340 | con->v1.in_base_pos); | |
2f713615 ID |
1341 | |
1342 | if (con->state == CEPH_CON_S_V1_BANNER) { | |
1343 | ret = read_partial_banner(con); | |
1344 | if (ret <= 0) | |
1345 | goto out; | |
1346 | ret = process_banner(con); | |
1347 | if (ret < 0) | |
1348 | goto out; | |
1349 | ||
1350 | con->state = CEPH_CON_S_V1_CONNECT_MSG; | |
1351 | ||
1352 | /* | |
1353 | * Received banner is good, exchange connection info. | |
1354 | * Do not reset out_kvec, as sending our banner raced | |
1355 | * with receiving peer banner after connect completed. | |
1356 | */ | |
1357 | ret = prepare_write_connect(con); | |
1358 | if (ret < 0) | |
1359 | goto out; | |
1360 | prepare_read_connect(con); | |
1361 | ||
1362 | /* Send connection info before awaiting response */ | |
1363 | goto out; | |
1364 | } | |
1365 | ||
1366 | if (con->state == CEPH_CON_S_V1_CONNECT_MSG) { | |
1367 | ret = read_partial_connect(con); | |
1368 | if (ret <= 0) | |
1369 | goto out; | |
1370 | ret = process_connect(con); | |
1371 | if (ret < 0) | |
1372 | goto out; | |
1373 | goto more; | |
1374 | } | |
1375 | ||
1376 | WARN_ON(con->state != CEPH_CON_S_OPEN); | |
1377 | ||
a56dd9bf | 1378 | if (con->v1.in_base_pos < 0) { |
2f713615 ID |
1379 | /* |
1380 | * skipping + discarding content. | |
1381 | */ | |
a56dd9bf | 1382 | ret = ceph_tcp_recvmsg(con->sock, NULL, -con->v1.in_base_pos); |
2f713615 ID |
1383 | if (ret <= 0) |
1384 | goto out; | |
a56dd9bf ID |
1385 | dout("skipped %d / %d bytes\n", ret, -con->v1.in_base_pos); |
1386 | con->v1.in_base_pos += ret; | |
1387 | if (con->v1.in_base_pos) | |
2f713615 ID |
1388 | goto more; |
1389 | } | |
a56dd9bf | 1390 | if (con->v1.in_tag == CEPH_MSGR_TAG_READY) { |
2f713615 ID |
1391 | /* |
1392 | * what's next? | |
1393 | */ | |
a56dd9bf | 1394 | ret = ceph_tcp_recvmsg(con->sock, &con->v1.in_tag, 1); |
2f713615 ID |
1395 | if (ret <= 0) |
1396 | goto out; | |
a56dd9bf ID |
1397 | dout("try_read got tag %d\n", con->v1.in_tag); |
1398 | switch (con->v1.in_tag) { | |
2f713615 ID |
1399 | case CEPH_MSGR_TAG_MSG: |
1400 | prepare_read_message(con); | |
1401 | break; | |
1402 | case CEPH_MSGR_TAG_ACK: | |
1403 | prepare_read_ack(con); | |
1404 | break; | |
1405 | case CEPH_MSGR_TAG_KEEPALIVE2_ACK: | |
1406 | prepare_read_keepalive_ack(con); | |
1407 | break; | |
1408 | case CEPH_MSGR_TAG_CLOSE: | |
1409 | ceph_con_close_socket(con); | |
1410 | con->state = CEPH_CON_S_CLOSED; | |
1411 | goto out; | |
1412 | default: | |
1413 | goto bad_tag; | |
1414 | } | |
1415 | } | |
a56dd9bf | 1416 | if (con->v1.in_tag == CEPH_MSGR_TAG_MSG) { |
2f713615 ID |
1417 | ret = read_partial_message(con); |
1418 | if (ret <= 0) { | |
1419 | switch (ret) { | |
1420 | case -EBADMSG: | |
1421 | con->error_msg = "bad crc/signature"; | |
1422 | fallthrough; | |
1423 | case -EBADE: | |
1424 | ret = -EIO; | |
1425 | break; | |
1426 | case -EIO: | |
1427 | con->error_msg = "io error"; | |
1428 | break; | |
1429 | } | |
1430 | goto out; | |
1431 | } | |
a56dd9bf | 1432 | if (con->v1.in_tag == CEPH_MSGR_TAG_READY) |
2f713615 ID |
1433 | goto more; |
1434 | ceph_con_process_message(con); | |
1435 | if (con->state == CEPH_CON_S_OPEN) | |
1436 | prepare_read_tag(con); | |
1437 | goto more; | |
1438 | } | |
a56dd9bf ID |
1439 | if (con->v1.in_tag == CEPH_MSGR_TAG_ACK || |
1440 | con->v1.in_tag == CEPH_MSGR_TAG_SEQ) { | |
2f713615 ID |
1441 | /* |
1442 | * the final handshake seq exchange is semantically | |
1443 | * equivalent to an ACK | |
1444 | */ | |
1445 | ret = read_partial_ack(con); | |
1446 | if (ret <= 0) | |
1447 | goto out; | |
1448 | process_ack(con); | |
1449 | goto more; | |
1450 | } | |
a56dd9bf | 1451 | if (con->v1.in_tag == CEPH_MSGR_TAG_KEEPALIVE2_ACK) { |
2f713615 ID |
1452 | ret = read_keepalive_ack(con); |
1453 | if (ret <= 0) | |
1454 | goto out; | |
1455 | goto more; | |
1456 | } | |
1457 | ||
1458 | out: | |
1459 | dout("try_read done on %p ret %d\n", con, ret); | |
1460 | return ret; | |
1461 | ||
1462 | bad_tag: | |
a56dd9bf | 1463 | pr_err("try_read bad tag %d\n", con->v1.in_tag); |
2f713615 ID |
1464 | con->error_msg = "protocol error, garbage tag"; |
1465 | ret = -1; | |
1466 | goto out; | |
1467 | } | |
1468 | ||
1469 | /* | |
1470 | * Write something to the socket. Called in a worker thread when the | |
1471 | * socket appears to be writeable and we have something ready to send. | |
1472 | */ | |
1473 | int ceph_con_v1_try_write(struct ceph_connection *con) | |
1474 | { | |
1475 | int ret = 1; | |
1476 | ||
1477 | dout("try_write start %p state %d\n", con, con->state); | |
1478 | if (con->state != CEPH_CON_S_PREOPEN && | |
1479 | con->state != CEPH_CON_S_V1_BANNER && | |
1480 | con->state != CEPH_CON_S_V1_CONNECT_MSG && | |
1481 | con->state != CEPH_CON_S_OPEN) | |
1482 | return 0; | |
1483 | ||
1484 | /* open the socket first? */ | |
1485 | if (con->state == CEPH_CON_S_PREOPEN) { | |
1486 | BUG_ON(con->sock); | |
1487 | con->state = CEPH_CON_S_V1_BANNER; | |
1488 | ||
1489 | con_out_kvec_reset(con); | |
1490 | prepare_write_banner(con); | |
1491 | prepare_read_banner(con); | |
1492 | ||
1493 | BUG_ON(con->in_msg); | |
a56dd9bf | 1494 | con->v1.in_tag = CEPH_MSGR_TAG_READY; |
2f713615 ID |
1495 | dout("try_write initiating connect on %p new state %d\n", |
1496 | con, con->state); | |
1497 | ret = ceph_tcp_connect(con); | |
1498 | if (ret < 0) { | |
1499 | con->error_msg = "connect error"; | |
1500 | goto out; | |
1501 | } | |
1502 | } | |
1503 | ||
1504 | more: | |
a56dd9bf | 1505 | dout("try_write out_kvec_bytes %d\n", con->v1.out_kvec_bytes); |
2f713615 ID |
1506 | BUG_ON(!con->sock); |
1507 | ||
1508 | /* kvec data queued? */ | |
a56dd9bf | 1509 | if (con->v1.out_kvec_left) { |
2f713615 ID |
1510 | ret = write_partial_kvec(con); |
1511 | if (ret <= 0) | |
1512 | goto out; | |
1513 | } | |
a56dd9bf | 1514 | if (con->v1.out_skip) { |
2f713615 ID |
1515 | ret = write_partial_skip(con); |
1516 | if (ret <= 0) | |
1517 | goto out; | |
1518 | } | |
1519 | ||
1520 | /* msg pages? */ | |
1521 | if (con->out_msg) { | |
a56dd9bf | 1522 | if (con->v1.out_msg_done) { |
2f713615 ID |
1523 | ceph_msg_put(con->out_msg); |
1524 | con->out_msg = NULL; /* we're done with this one */ | |
1525 | goto do_next; | |
1526 | } | |
1527 | ||
1528 | ret = write_partial_message_data(con); | |
1529 | if (ret == 1) | |
1530 | goto more; /* we need to send the footer, too! */ | |
1531 | if (ret == 0) | |
1532 | goto out; | |
1533 | if (ret < 0) { | |
1534 | dout("try_write write_partial_message_data err %d\n", | |
1535 | ret); | |
1536 | goto out; | |
1537 | } | |
1538 | } | |
1539 | ||
1540 | do_next: | |
1541 | if (con->state == CEPH_CON_S_OPEN) { | |
1542 | if (ceph_con_flag_test_and_clear(con, | |
1543 | CEPH_CON_F_KEEPALIVE_PENDING)) { | |
1544 | prepare_write_keepalive(con); | |
1545 | goto more; | |
1546 | } | |
1547 | /* is anything else pending? */ | |
1548 | if (!list_empty(&con->out_queue)) { | |
1549 | prepare_write_message(con); | |
1550 | goto more; | |
1551 | } | |
1552 | if (con->in_seq > con->in_seq_acked) { | |
1553 | prepare_write_ack(con); | |
1554 | goto more; | |
1555 | } | |
1556 | } | |
1557 | ||
1558 | /* Nothing to do! */ | |
1559 | ceph_con_flag_clear(con, CEPH_CON_F_WRITE_PENDING); | |
1560 | dout("try_write nothing else to write.\n"); | |
1561 | ret = 0; | |
1562 | out: | |
1563 | dout("try_write done on %p ret %d\n", con, ret); | |
1564 | return ret; | |
1565 | } | |
1566 | ||
1567 | void ceph_con_v1_revoke(struct ceph_connection *con) | |
1568 | { | |
1569 | struct ceph_msg *msg = con->out_msg; | |
1570 | ||
a56dd9bf | 1571 | WARN_ON(con->v1.out_skip); |
2f713615 | 1572 | /* footer */ |
a56dd9bf ID |
1573 | if (con->v1.out_msg_done) { |
1574 | con->v1.out_skip += con_out_kvec_skip(con); | |
2f713615 ID |
1575 | } else { |
1576 | WARN_ON(!msg->data_length); | |
a56dd9bf | 1577 | con->v1.out_skip += sizeof_footer(con); |
2f713615 ID |
1578 | } |
1579 | /* data, middle, front */ | |
1580 | if (msg->data_length) | |
a56dd9bf | 1581 | con->v1.out_skip += msg->cursor.total_resid; |
2f713615 | 1582 | if (msg->middle) |
a56dd9bf ID |
1583 | con->v1.out_skip += con_out_kvec_skip(con); |
1584 | con->v1.out_skip += con_out_kvec_skip(con); | |
2f713615 ID |
1585 | |
1586 | dout("%s con %p out_kvec_bytes %d out_skip %d\n", __func__, con, | |
a56dd9bf | 1587 | con->v1.out_kvec_bytes, con->v1.out_skip); |
2f713615 ID |
1588 | } |
1589 | ||
1590 | void ceph_con_v1_revoke_incoming(struct ceph_connection *con) | |
1591 | { | |
a56dd9bf ID |
1592 | unsigned int front_len = le32_to_cpu(con->v1.in_hdr.front_len); |
1593 | unsigned int middle_len = le32_to_cpu(con->v1.in_hdr.middle_len); | |
1594 | unsigned int data_len = le32_to_cpu(con->v1.in_hdr.data_len); | |
2f713615 ID |
1595 | |
1596 | /* skip rest of message */ | |
a56dd9bf | 1597 | con->v1.in_base_pos = con->v1.in_base_pos - |
2f713615 ID |
1598 | sizeof(struct ceph_msg_header) - |
1599 | front_len - | |
1600 | middle_len - | |
1601 | data_len - | |
1602 | sizeof(struct ceph_msg_footer); | |
1603 | ||
a56dd9bf | 1604 | con->v1.in_tag = CEPH_MSGR_TAG_READY; |
2f713615 ID |
1605 | con->in_seq++; |
1606 | ||
a56dd9bf | 1607 | dout("%s con %p in_base_pos %d\n", __func__, con, con->v1.in_base_pos); |
2f713615 ID |
1608 | } |
1609 | ||
1610 | bool ceph_con_v1_opened(struct ceph_connection *con) | |
1611 | { | |
a56dd9bf | 1612 | return con->v1.connect_seq; |
2f713615 ID |
1613 | } |
1614 | ||
1615 | void ceph_con_v1_reset_session(struct ceph_connection *con) | |
1616 | { | |
a56dd9bf ID |
1617 | con->v1.connect_seq = 0; |
1618 | con->v1.peer_global_seq = 0; | |
2f713615 ID |
1619 | } |
1620 | ||
1621 | void ceph_con_v1_reset_protocol(struct ceph_connection *con) | |
1622 | { | |
a56dd9bf | 1623 | con->v1.out_skip = 0; |
2f713615 | 1624 | } |