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Commit | Line | Data |
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31b8006e SW |
1 | #include "ceph_debug.h" |
2 | ||
3 | #include <linux/crc32c.h> | |
4 | #include <linux/ctype.h> | |
5 | #include <linux/highmem.h> | |
6 | #include <linux/inet.h> | |
7 | #include <linux/kthread.h> | |
8 | #include <linux/net.h> | |
5a0e3ad6 | 9 | #include <linux/slab.h> |
31b8006e SW |
10 | #include <linux/socket.h> |
11 | #include <linux/string.h> | |
68b4476b YS |
12 | #include <linux/bio.h> |
13 | #include <linux/blkdev.h> | |
31b8006e SW |
14 | #include <net/tcp.h> |
15 | ||
16 | #include "super.h" | |
17 | #include "messenger.h" | |
63f2d211 | 18 | #include "decode.h" |
58bb3b37 | 19 | #include "pagelist.h" |
31b8006e SW |
20 | |
21 | /* | |
22 | * Ceph uses the messenger to exchange ceph_msg messages with other | |
23 | * hosts in the system. The messenger provides ordered and reliable | |
24 | * delivery. We tolerate TCP disconnects by reconnecting (with | |
25 | * exponential backoff) in the case of a fault (disconnection, bad | |
26 | * crc, protocol error). Acks allow sent messages to be discarded by | |
27 | * the sender. | |
28 | */ | |
29 | ||
30 | /* static tag bytes (protocol control messages) */ | |
31 | static char tag_msg = CEPH_MSGR_TAG_MSG; | |
32 | static char tag_ack = CEPH_MSGR_TAG_ACK; | |
33 | static char tag_keepalive = CEPH_MSGR_TAG_KEEPALIVE; | |
34 | ||
a6a5349d SW |
35 | #ifdef CONFIG_LOCKDEP |
36 | static struct lock_class_key socket_class; | |
37 | #endif | |
38 | ||
31b8006e SW |
39 | |
40 | static void queue_con(struct ceph_connection *con); | |
41 | static void con_work(struct work_struct *); | |
42 | static void ceph_fault(struct ceph_connection *con); | |
43 | ||
31b8006e SW |
44 | /* |
45 | * nicely render a sockaddr as a string. | |
46 | */ | |
47 | #define MAX_ADDR_STR 20 | |
d06dbaf6 SW |
48 | #define MAX_ADDR_STR_LEN 60 |
49 | static char addr_str[MAX_ADDR_STR][MAX_ADDR_STR_LEN]; | |
31b8006e SW |
50 | static DEFINE_SPINLOCK(addr_str_lock); |
51 | static int last_addr_str; | |
52 | ||
53 | const char *pr_addr(const struct sockaddr_storage *ss) | |
54 | { | |
55 | int i; | |
56 | char *s; | |
57 | struct sockaddr_in *in4 = (void *)ss; | |
31b8006e SW |
58 | struct sockaddr_in6 *in6 = (void *)ss; |
59 | ||
60 | spin_lock(&addr_str_lock); | |
61 | i = last_addr_str++; | |
62 | if (last_addr_str == MAX_ADDR_STR) | |
63 | last_addr_str = 0; | |
64 | spin_unlock(&addr_str_lock); | |
65 | s = addr_str[i]; | |
66 | ||
67 | switch (ss->ss_family) { | |
68 | case AF_INET: | |
d06dbaf6 SW |
69 | snprintf(s, MAX_ADDR_STR_LEN, "%pI4:%u", &in4->sin_addr, |
70 | (unsigned int)ntohs(in4->sin_port)); | |
31b8006e SW |
71 | break; |
72 | ||
73 | case AF_INET6: | |
d06dbaf6 SW |
74 | snprintf(s, MAX_ADDR_STR_LEN, "[%pI6c]:%u", &in6->sin6_addr, |
75 | (unsigned int)ntohs(in6->sin6_port)); | |
31b8006e SW |
76 | break; |
77 | ||
78 | default: | |
79 | sprintf(s, "(unknown sockaddr family %d)", (int)ss->ss_family); | |
80 | } | |
81 | ||
82 | return s; | |
83 | } | |
84 | ||
63f2d211 SW |
85 | static void encode_my_addr(struct ceph_messenger *msgr) |
86 | { | |
87 | memcpy(&msgr->my_enc_addr, &msgr->inst.addr, sizeof(msgr->my_enc_addr)); | |
88 | ceph_encode_addr(&msgr->my_enc_addr); | |
89 | } | |
90 | ||
31b8006e SW |
91 | /* |
92 | * work queue for all reading and writing to/from the socket. | |
93 | */ | |
94 | struct workqueue_struct *ceph_msgr_wq; | |
95 | ||
96 | int __init ceph_msgr_init(void) | |
97 | { | |
98 | ceph_msgr_wq = create_workqueue("ceph-msgr"); | |
99 | if (IS_ERR(ceph_msgr_wq)) { | |
100 | int ret = PTR_ERR(ceph_msgr_wq); | |
101 | pr_err("msgr_init failed to create workqueue: %d\n", ret); | |
102 | ceph_msgr_wq = NULL; | |
103 | return ret; | |
104 | } | |
105 | return 0; | |
106 | } | |
107 | ||
108 | void ceph_msgr_exit(void) | |
109 | { | |
110 | destroy_workqueue(ceph_msgr_wq); | |
111 | } | |
112 | ||
cd84db6e | 113 | void ceph_msgr_flush(void) |
a922d38f SW |
114 | { |
115 | flush_workqueue(ceph_msgr_wq); | |
116 | } | |
117 | ||
118 | ||
31b8006e SW |
119 | /* |
120 | * socket callback functions | |
121 | */ | |
122 | ||
123 | /* data available on socket, or listen socket received a connect */ | |
124 | static void ceph_data_ready(struct sock *sk, int count_unused) | |
125 | { | |
126 | struct ceph_connection *con = | |
127 | (struct ceph_connection *)sk->sk_user_data; | |
128 | if (sk->sk_state != TCP_CLOSE_WAIT) { | |
129 | dout("ceph_data_ready on %p state = %lu, queueing work\n", | |
130 | con, con->state); | |
131 | queue_con(con); | |
132 | } | |
133 | } | |
134 | ||
135 | /* socket has buffer space for writing */ | |
136 | static void ceph_write_space(struct sock *sk) | |
137 | { | |
138 | struct ceph_connection *con = | |
139 | (struct ceph_connection *)sk->sk_user_data; | |
140 | ||
141 | /* only queue to workqueue if there is data we want to write. */ | |
142 | if (test_bit(WRITE_PENDING, &con->state)) { | |
143 | dout("ceph_write_space %p queueing write work\n", con); | |
144 | queue_con(con); | |
145 | } else { | |
146 | dout("ceph_write_space %p nothing to write\n", con); | |
147 | } | |
148 | ||
149 | /* since we have our own write_space, clear the SOCK_NOSPACE flag */ | |
150 | clear_bit(SOCK_NOSPACE, &sk->sk_socket->flags); | |
151 | } | |
152 | ||
153 | /* socket's state has changed */ | |
154 | static void ceph_state_change(struct sock *sk) | |
155 | { | |
156 | struct ceph_connection *con = | |
157 | (struct ceph_connection *)sk->sk_user_data; | |
158 | ||
159 | dout("ceph_state_change %p state = %lu sk_state = %u\n", | |
160 | con, con->state, sk->sk_state); | |
161 | ||
162 | if (test_bit(CLOSED, &con->state)) | |
163 | return; | |
164 | ||
165 | switch (sk->sk_state) { | |
166 | case TCP_CLOSE: | |
167 | dout("ceph_state_change TCP_CLOSE\n"); | |
168 | case TCP_CLOSE_WAIT: | |
169 | dout("ceph_state_change TCP_CLOSE_WAIT\n"); | |
170 | if (test_and_set_bit(SOCK_CLOSED, &con->state) == 0) { | |
171 | if (test_bit(CONNECTING, &con->state)) | |
172 | con->error_msg = "connection failed"; | |
173 | else | |
174 | con->error_msg = "socket closed"; | |
175 | queue_con(con); | |
176 | } | |
177 | break; | |
178 | case TCP_ESTABLISHED: | |
179 | dout("ceph_state_change TCP_ESTABLISHED\n"); | |
180 | queue_con(con); | |
181 | break; | |
182 | } | |
183 | } | |
184 | ||
185 | /* | |
186 | * set up socket callbacks | |
187 | */ | |
188 | static void set_sock_callbacks(struct socket *sock, | |
189 | struct ceph_connection *con) | |
190 | { | |
191 | struct sock *sk = sock->sk; | |
192 | sk->sk_user_data = (void *)con; | |
193 | sk->sk_data_ready = ceph_data_ready; | |
194 | sk->sk_write_space = ceph_write_space; | |
195 | sk->sk_state_change = ceph_state_change; | |
196 | } | |
197 | ||
198 | ||
199 | /* | |
200 | * socket helpers | |
201 | */ | |
202 | ||
203 | /* | |
204 | * initiate connection to a remote socket. | |
205 | */ | |
206 | static struct socket *ceph_tcp_connect(struct ceph_connection *con) | |
207 | { | |
f91d3471 | 208 | struct sockaddr_storage *paddr = &con->peer_addr.in_addr; |
31b8006e SW |
209 | struct socket *sock; |
210 | int ret; | |
211 | ||
212 | BUG_ON(con->sock); | |
f91d3471 SW |
213 | ret = sock_create_kern(con->peer_addr.in_addr.ss_family, SOCK_STREAM, |
214 | IPPROTO_TCP, &sock); | |
31b8006e SW |
215 | if (ret) |
216 | return ERR_PTR(ret); | |
217 | con->sock = sock; | |
218 | sock->sk->sk_allocation = GFP_NOFS; | |
219 | ||
a6a5349d SW |
220 | #ifdef CONFIG_LOCKDEP |
221 | lockdep_set_class(&sock->sk->sk_lock, &socket_class); | |
222 | #endif | |
223 | ||
31b8006e SW |
224 | set_sock_callbacks(sock, con); |
225 | ||
226 | dout("connect %s\n", pr_addr(&con->peer_addr.in_addr)); | |
227 | ||
f91d3471 SW |
228 | ret = sock->ops->connect(sock, (struct sockaddr *)paddr, sizeof(*paddr), |
229 | O_NONBLOCK); | |
31b8006e SW |
230 | if (ret == -EINPROGRESS) { |
231 | dout("connect %s EINPROGRESS sk_state = %u\n", | |
232 | pr_addr(&con->peer_addr.in_addr), | |
233 | sock->sk->sk_state); | |
234 | ret = 0; | |
235 | } | |
236 | if (ret < 0) { | |
237 | pr_err("connect %s error %d\n", | |
238 | pr_addr(&con->peer_addr.in_addr), ret); | |
239 | sock_release(sock); | |
240 | con->sock = NULL; | |
241 | con->error_msg = "connect error"; | |
242 | } | |
243 | ||
244 | if (ret < 0) | |
245 | return ERR_PTR(ret); | |
246 | return sock; | |
247 | } | |
248 | ||
249 | static int ceph_tcp_recvmsg(struct socket *sock, void *buf, size_t len) | |
250 | { | |
251 | struct kvec iov = {buf, len}; | |
252 | struct msghdr msg = { .msg_flags = MSG_DONTWAIT | MSG_NOSIGNAL }; | |
253 | ||
254 | return kernel_recvmsg(sock, &msg, &iov, 1, len, msg.msg_flags); | |
255 | } | |
256 | ||
257 | /* | |
258 | * write something. @more is true if caller will be sending more data | |
259 | * shortly. | |
260 | */ | |
261 | static int ceph_tcp_sendmsg(struct socket *sock, struct kvec *iov, | |
262 | size_t kvlen, size_t len, int more) | |
263 | { | |
264 | struct msghdr msg = { .msg_flags = MSG_DONTWAIT | MSG_NOSIGNAL }; | |
265 | ||
266 | if (more) | |
267 | msg.msg_flags |= MSG_MORE; | |
268 | else | |
269 | msg.msg_flags |= MSG_EOR; /* superfluous, but what the hell */ | |
270 | ||
271 | return kernel_sendmsg(sock, &msg, iov, kvlen, len); | |
272 | } | |
273 | ||
274 | ||
275 | /* | |
276 | * Shutdown/close the socket for the given connection. | |
277 | */ | |
278 | static int con_close_socket(struct ceph_connection *con) | |
279 | { | |
280 | int rc; | |
281 | ||
282 | dout("con_close_socket on %p sock %p\n", con, con->sock); | |
283 | if (!con->sock) | |
284 | return 0; | |
285 | set_bit(SOCK_CLOSED, &con->state); | |
286 | rc = con->sock->ops->shutdown(con->sock, SHUT_RDWR); | |
287 | sock_release(con->sock); | |
288 | con->sock = NULL; | |
289 | clear_bit(SOCK_CLOSED, &con->state); | |
290 | return rc; | |
291 | } | |
292 | ||
293 | /* | |
294 | * Reset a connection. Discard all incoming and outgoing messages | |
295 | * and clear *_seq state. | |
296 | */ | |
297 | static void ceph_msg_remove(struct ceph_msg *msg) | |
298 | { | |
299 | list_del_init(&msg->list_head); | |
300 | ceph_msg_put(msg); | |
301 | } | |
302 | static void ceph_msg_remove_list(struct list_head *head) | |
303 | { | |
304 | while (!list_empty(head)) { | |
305 | struct ceph_msg *msg = list_first_entry(head, struct ceph_msg, | |
306 | list_head); | |
307 | ceph_msg_remove(msg); | |
308 | } | |
309 | } | |
310 | ||
311 | static void reset_connection(struct ceph_connection *con) | |
312 | { | |
313 | /* reset connection, out_queue, msg_ and connect_seq */ | |
314 | /* discard existing out_queue and msg_seq */ | |
31b8006e SW |
315 | ceph_msg_remove_list(&con->out_queue); |
316 | ceph_msg_remove_list(&con->out_sent); | |
317 | ||
cf3e5c40 SW |
318 | if (con->in_msg) { |
319 | ceph_msg_put(con->in_msg); | |
320 | con->in_msg = NULL; | |
321 | } | |
322 | ||
31b8006e SW |
323 | con->connect_seq = 0; |
324 | con->out_seq = 0; | |
c86a2930 SW |
325 | if (con->out_msg) { |
326 | ceph_msg_put(con->out_msg); | |
327 | con->out_msg = NULL; | |
328 | } | |
6f2bc3ff | 329 | con->out_keepalive_pending = false; |
31b8006e | 330 | con->in_seq = 0; |
0e0d5e0c | 331 | con->in_seq_acked = 0; |
31b8006e SW |
332 | } |
333 | ||
334 | /* | |
335 | * mark a peer down. drop any open connections. | |
336 | */ | |
337 | void ceph_con_close(struct ceph_connection *con) | |
338 | { | |
339 | dout("con_close %p peer %s\n", con, pr_addr(&con->peer_addr.in_addr)); | |
340 | set_bit(CLOSED, &con->state); /* in case there's queued work */ | |
341 | clear_bit(STANDBY, &con->state); /* avoid connect_seq bump */ | |
1679f876 SW |
342 | clear_bit(LOSSYTX, &con->state); /* so we retry next connect */ |
343 | clear_bit(KEEPALIVE_PENDING, &con->state); | |
344 | clear_bit(WRITE_PENDING, &con->state); | |
ec302645 | 345 | mutex_lock(&con->mutex); |
31b8006e | 346 | reset_connection(con); |
6f2bc3ff | 347 | con->peer_global_seq = 0; |
91e45ce3 | 348 | cancel_delayed_work(&con->work); |
ec302645 | 349 | mutex_unlock(&con->mutex); |
31b8006e SW |
350 | queue_con(con); |
351 | } | |
352 | ||
31b8006e SW |
353 | /* |
354 | * Reopen a closed connection, with a new peer address. | |
355 | */ | |
356 | void ceph_con_open(struct ceph_connection *con, struct ceph_entity_addr *addr) | |
357 | { | |
358 | dout("con_open %p %s\n", con, pr_addr(&addr->in_addr)); | |
359 | set_bit(OPENING, &con->state); | |
360 | clear_bit(CLOSED, &con->state); | |
361 | memcpy(&con->peer_addr, addr, sizeof(*addr)); | |
03c677e1 | 362 | con->delay = 0; /* reset backoff memory */ |
31b8006e SW |
363 | queue_con(con); |
364 | } | |
365 | ||
87b315a5 SW |
366 | /* |
367 | * return true if this connection ever successfully opened | |
368 | */ | |
369 | bool ceph_con_opened(struct ceph_connection *con) | |
370 | { | |
371 | return con->connect_seq > 0; | |
372 | } | |
373 | ||
31b8006e SW |
374 | /* |
375 | * generic get/put | |
376 | */ | |
377 | struct ceph_connection *ceph_con_get(struct ceph_connection *con) | |
378 | { | |
379 | dout("con_get %p nref = %d -> %d\n", con, | |
380 | atomic_read(&con->nref), atomic_read(&con->nref) + 1); | |
381 | if (atomic_inc_not_zero(&con->nref)) | |
382 | return con; | |
383 | return NULL; | |
384 | } | |
385 | ||
386 | void ceph_con_put(struct ceph_connection *con) | |
387 | { | |
388 | dout("con_put %p nref = %d -> %d\n", con, | |
389 | atomic_read(&con->nref), atomic_read(&con->nref) - 1); | |
390 | BUG_ON(atomic_read(&con->nref) == 0); | |
391 | if (atomic_dec_and_test(&con->nref)) { | |
71ececda | 392 | BUG_ON(con->sock); |
31b8006e SW |
393 | kfree(con); |
394 | } | |
395 | } | |
396 | ||
397 | /* | |
398 | * initialize a new connection. | |
399 | */ | |
400 | void ceph_con_init(struct ceph_messenger *msgr, struct ceph_connection *con) | |
401 | { | |
402 | dout("con_init %p\n", con); | |
403 | memset(con, 0, sizeof(*con)); | |
404 | atomic_set(&con->nref, 1); | |
405 | con->msgr = msgr; | |
ec302645 | 406 | mutex_init(&con->mutex); |
31b8006e SW |
407 | INIT_LIST_HEAD(&con->out_queue); |
408 | INIT_LIST_HEAD(&con->out_sent); | |
409 | INIT_DELAYED_WORK(&con->work, con_work); | |
410 | } | |
411 | ||
412 | ||
413 | /* | |
414 | * We maintain a global counter to order connection attempts. Get | |
415 | * a unique seq greater than @gt. | |
416 | */ | |
417 | static u32 get_global_seq(struct ceph_messenger *msgr, u32 gt) | |
418 | { | |
419 | u32 ret; | |
420 | ||
421 | spin_lock(&msgr->global_seq_lock); | |
422 | if (msgr->global_seq < gt) | |
423 | msgr->global_seq = gt; | |
424 | ret = ++msgr->global_seq; | |
425 | spin_unlock(&msgr->global_seq_lock); | |
426 | return ret; | |
427 | } | |
428 | ||
429 | ||
430 | /* | |
431 | * Prepare footer for currently outgoing message, and finish things | |
432 | * off. Assumes out_kvec* are already valid.. we just add on to the end. | |
433 | */ | |
434 | static void prepare_write_message_footer(struct ceph_connection *con, int v) | |
435 | { | |
436 | struct ceph_msg *m = con->out_msg; | |
437 | ||
438 | dout("prepare_write_message_footer %p\n", con); | |
439 | con->out_kvec_is_msg = true; | |
440 | con->out_kvec[v].iov_base = &m->footer; | |
441 | con->out_kvec[v].iov_len = sizeof(m->footer); | |
442 | con->out_kvec_bytes += sizeof(m->footer); | |
443 | con->out_kvec_left++; | |
444 | con->out_more = m->more_to_follow; | |
c86a2930 | 445 | con->out_msg_done = true; |
31b8006e SW |
446 | } |
447 | ||
448 | /* | |
449 | * Prepare headers for the next outgoing message. | |
450 | */ | |
451 | static void prepare_write_message(struct ceph_connection *con) | |
452 | { | |
453 | struct ceph_msg *m; | |
454 | int v = 0; | |
455 | ||
456 | con->out_kvec_bytes = 0; | |
457 | con->out_kvec_is_msg = true; | |
c86a2930 | 458 | con->out_msg_done = false; |
31b8006e SW |
459 | |
460 | /* Sneak an ack in there first? If we can get it into the same | |
461 | * TCP packet that's a good thing. */ | |
462 | if (con->in_seq > con->in_seq_acked) { | |
463 | con->in_seq_acked = con->in_seq; | |
464 | con->out_kvec[v].iov_base = &tag_ack; | |
465 | con->out_kvec[v++].iov_len = 1; | |
466 | con->out_temp_ack = cpu_to_le64(con->in_seq_acked); | |
467 | con->out_kvec[v].iov_base = &con->out_temp_ack; | |
468 | con->out_kvec[v++].iov_len = sizeof(con->out_temp_ack); | |
469 | con->out_kvec_bytes = 1 + sizeof(con->out_temp_ack); | |
470 | } | |
471 | ||
31b8006e SW |
472 | m = list_first_entry(&con->out_queue, |
473 | struct ceph_msg, list_head); | |
c86a2930 | 474 | con->out_msg = m; |
b3d1dbbd | 475 | if (test_bit(LOSSYTX, &con->state)) { |
6c5d1a49 SW |
476 | list_del_init(&m->list_head); |
477 | } else { | |
b3d1dbbd SW |
478 | /* put message on sent list */ |
479 | ceph_msg_get(m); | |
480 | list_move_tail(&m->list_head, &con->out_sent); | |
b3d1dbbd | 481 | } |
31b8006e | 482 | |
e84346b7 SW |
483 | /* |
484 | * only assign outgoing seq # if we haven't sent this message | |
485 | * yet. if it is requeued, resend with it's original seq. | |
486 | */ | |
487 | if (m->needs_out_seq) { | |
488 | m->hdr.seq = cpu_to_le64(++con->out_seq); | |
489 | m->needs_out_seq = false; | |
490 | } | |
31b8006e SW |
491 | |
492 | dout("prepare_write_message %p seq %lld type %d len %d+%d+%d %d pgs\n", | |
493 | m, con->out_seq, le16_to_cpu(m->hdr.type), | |
494 | le32_to_cpu(m->hdr.front_len), le32_to_cpu(m->hdr.middle_len), | |
495 | le32_to_cpu(m->hdr.data_len), | |
496 | m->nr_pages); | |
497 | BUG_ON(le32_to_cpu(m->hdr.front_len) != m->front.iov_len); | |
498 | ||
499 | /* tag + hdr + front + middle */ | |
500 | con->out_kvec[v].iov_base = &tag_msg; | |
501 | con->out_kvec[v++].iov_len = 1; | |
502 | con->out_kvec[v].iov_base = &m->hdr; | |
503 | con->out_kvec[v++].iov_len = sizeof(m->hdr); | |
504 | con->out_kvec[v++] = m->front; | |
505 | if (m->middle) | |
506 | con->out_kvec[v++] = m->middle->vec; | |
507 | con->out_kvec_left = v; | |
508 | con->out_kvec_bytes += 1 + sizeof(m->hdr) + m->front.iov_len + | |
509 | (m->middle ? m->middle->vec.iov_len : 0); | |
510 | con->out_kvec_cur = con->out_kvec; | |
511 | ||
512 | /* fill in crc (except data pages), footer */ | |
513 | con->out_msg->hdr.crc = | |
514 | cpu_to_le32(crc32c(0, (void *)&m->hdr, | |
515 | sizeof(m->hdr) - sizeof(m->hdr.crc))); | |
516 | con->out_msg->footer.flags = CEPH_MSG_FOOTER_COMPLETE; | |
517 | con->out_msg->footer.front_crc = | |
518 | cpu_to_le32(crc32c(0, m->front.iov_base, m->front.iov_len)); | |
519 | if (m->middle) | |
520 | con->out_msg->footer.middle_crc = | |
521 | cpu_to_le32(crc32c(0, m->middle->vec.iov_base, | |
522 | m->middle->vec.iov_len)); | |
523 | else | |
524 | con->out_msg->footer.middle_crc = 0; | |
525 | con->out_msg->footer.data_crc = 0; | |
526 | dout("prepare_write_message front_crc %u data_crc %u\n", | |
527 | le32_to_cpu(con->out_msg->footer.front_crc), | |
528 | le32_to_cpu(con->out_msg->footer.middle_crc)); | |
529 | ||
530 | /* is there a data payload? */ | |
531 | if (le32_to_cpu(m->hdr.data_len) > 0) { | |
532 | /* initialize page iterator */ | |
533 | con->out_msg_pos.page = 0; | |
68b4476b YS |
534 | if (m->pages) |
535 | con->out_msg_pos.page_pos = | |
536 | le16_to_cpu(m->hdr.data_off) & ~PAGE_MASK; | |
537 | else | |
538 | con->out_msg_pos.page_pos = 0; | |
31b8006e SW |
539 | con->out_msg_pos.data_pos = 0; |
540 | con->out_msg_pos.did_page_crc = 0; | |
541 | con->out_more = 1; /* data + footer will follow */ | |
542 | } else { | |
543 | /* no, queue up footer too and be done */ | |
544 | prepare_write_message_footer(con, v); | |
545 | } | |
546 | ||
547 | set_bit(WRITE_PENDING, &con->state); | |
548 | } | |
549 | ||
550 | /* | |
551 | * Prepare an ack. | |
552 | */ | |
553 | static void prepare_write_ack(struct ceph_connection *con) | |
554 | { | |
555 | dout("prepare_write_ack %p %llu -> %llu\n", con, | |
556 | con->in_seq_acked, con->in_seq); | |
557 | con->in_seq_acked = con->in_seq; | |
558 | ||
559 | con->out_kvec[0].iov_base = &tag_ack; | |
560 | con->out_kvec[0].iov_len = 1; | |
561 | con->out_temp_ack = cpu_to_le64(con->in_seq_acked); | |
562 | con->out_kvec[1].iov_base = &con->out_temp_ack; | |
563 | con->out_kvec[1].iov_len = sizeof(con->out_temp_ack); | |
564 | con->out_kvec_left = 2; | |
565 | con->out_kvec_bytes = 1 + sizeof(con->out_temp_ack); | |
566 | con->out_kvec_cur = con->out_kvec; | |
567 | con->out_more = 1; /* more will follow.. eventually.. */ | |
568 | set_bit(WRITE_PENDING, &con->state); | |
569 | } | |
570 | ||
571 | /* | |
572 | * Prepare to write keepalive byte. | |
573 | */ | |
574 | static void prepare_write_keepalive(struct ceph_connection *con) | |
575 | { | |
576 | dout("prepare_write_keepalive %p\n", con); | |
577 | con->out_kvec[0].iov_base = &tag_keepalive; | |
578 | con->out_kvec[0].iov_len = 1; | |
579 | con->out_kvec_left = 1; | |
580 | con->out_kvec_bytes = 1; | |
581 | con->out_kvec_cur = con->out_kvec; | |
582 | set_bit(WRITE_PENDING, &con->state); | |
583 | } | |
584 | ||
585 | /* | |
586 | * Connection negotiation. | |
587 | */ | |
588 | ||
4e7a5dcd SW |
589 | static void prepare_connect_authorizer(struct ceph_connection *con) |
590 | { | |
591 | void *auth_buf; | |
592 | int auth_len = 0; | |
593 | int auth_protocol = 0; | |
594 | ||
ec302645 | 595 | mutex_unlock(&con->mutex); |
4e7a5dcd SW |
596 | if (con->ops->get_authorizer) |
597 | con->ops->get_authorizer(con, &auth_buf, &auth_len, | |
598 | &auth_protocol, &con->auth_reply_buf, | |
599 | &con->auth_reply_buf_len, | |
600 | con->auth_retry); | |
ec302645 | 601 | mutex_lock(&con->mutex); |
4e7a5dcd SW |
602 | |
603 | con->out_connect.authorizer_protocol = cpu_to_le32(auth_protocol); | |
604 | con->out_connect.authorizer_len = cpu_to_le32(auth_len); | |
605 | ||
606 | con->out_kvec[con->out_kvec_left].iov_base = auth_buf; | |
607 | con->out_kvec[con->out_kvec_left].iov_len = auth_len; | |
608 | con->out_kvec_left++; | |
609 | con->out_kvec_bytes += auth_len; | |
610 | } | |
611 | ||
31b8006e SW |
612 | /* |
613 | * We connected to a peer and are saying hello. | |
614 | */ | |
eed0ef2c SW |
615 | static void prepare_write_banner(struct ceph_messenger *msgr, |
616 | struct ceph_connection *con) | |
31b8006e SW |
617 | { |
618 | int len = strlen(CEPH_BANNER); | |
eed0ef2c SW |
619 | |
620 | con->out_kvec[0].iov_base = CEPH_BANNER; | |
621 | con->out_kvec[0].iov_len = len; | |
622 | con->out_kvec[1].iov_base = &msgr->my_enc_addr; | |
623 | con->out_kvec[1].iov_len = sizeof(msgr->my_enc_addr); | |
624 | con->out_kvec_left = 2; | |
625 | con->out_kvec_bytes = len + sizeof(msgr->my_enc_addr); | |
626 | con->out_kvec_cur = con->out_kvec; | |
627 | con->out_more = 0; | |
628 | set_bit(WRITE_PENDING, &con->state); | |
629 | } | |
630 | ||
631 | static void prepare_write_connect(struct ceph_messenger *msgr, | |
632 | struct ceph_connection *con, | |
633 | int after_banner) | |
634 | { | |
31b8006e SW |
635 | unsigned global_seq = get_global_seq(con->msgr, 0); |
636 | int proto; | |
637 | ||
638 | switch (con->peer_name.type) { | |
639 | case CEPH_ENTITY_TYPE_MON: | |
640 | proto = CEPH_MONC_PROTOCOL; | |
641 | break; | |
642 | case CEPH_ENTITY_TYPE_OSD: | |
643 | proto = CEPH_OSDC_PROTOCOL; | |
644 | break; | |
645 | case CEPH_ENTITY_TYPE_MDS: | |
646 | proto = CEPH_MDSC_PROTOCOL; | |
647 | break; | |
648 | default: | |
649 | BUG(); | |
650 | } | |
651 | ||
652 | dout("prepare_write_connect %p cseq=%d gseq=%d proto=%d\n", con, | |
653 | con->connect_seq, global_seq, proto); | |
4e7a5dcd | 654 | |
6a259382 | 655 | con->out_connect.features = cpu_to_le64(CEPH_FEATURE_SUPPORTED); |
31b8006e SW |
656 | con->out_connect.host_type = cpu_to_le32(CEPH_ENTITY_TYPE_CLIENT); |
657 | con->out_connect.connect_seq = cpu_to_le32(con->connect_seq); | |
658 | con->out_connect.global_seq = cpu_to_le32(global_seq); | |
659 | con->out_connect.protocol_version = cpu_to_le32(proto); | |
660 | con->out_connect.flags = 0; | |
31b8006e | 661 | |
eed0ef2c SW |
662 | if (!after_banner) { |
663 | con->out_kvec_left = 0; | |
664 | con->out_kvec_bytes = 0; | |
665 | } | |
666 | con->out_kvec[con->out_kvec_left].iov_base = &con->out_connect; | |
667 | con->out_kvec[con->out_kvec_left].iov_len = sizeof(con->out_connect); | |
668 | con->out_kvec_left++; | |
669 | con->out_kvec_bytes += sizeof(con->out_connect); | |
31b8006e SW |
670 | con->out_kvec_cur = con->out_kvec; |
671 | con->out_more = 0; | |
672 | set_bit(WRITE_PENDING, &con->state); | |
4e7a5dcd SW |
673 | |
674 | prepare_connect_authorizer(con); | |
31b8006e SW |
675 | } |
676 | ||
677 | ||
678 | /* | |
679 | * write as much of pending kvecs to the socket as we can. | |
680 | * 1 -> done | |
681 | * 0 -> socket full, but more to do | |
682 | * <0 -> error | |
683 | */ | |
684 | static int write_partial_kvec(struct ceph_connection *con) | |
685 | { | |
686 | int ret; | |
687 | ||
688 | dout("write_partial_kvec %p %d left\n", con, con->out_kvec_bytes); | |
689 | while (con->out_kvec_bytes > 0) { | |
690 | ret = ceph_tcp_sendmsg(con->sock, con->out_kvec_cur, | |
691 | con->out_kvec_left, con->out_kvec_bytes, | |
692 | con->out_more); | |
693 | if (ret <= 0) | |
694 | goto out; | |
695 | con->out_kvec_bytes -= ret; | |
696 | if (con->out_kvec_bytes == 0) | |
697 | break; /* done */ | |
698 | while (ret > 0) { | |
699 | if (ret >= con->out_kvec_cur->iov_len) { | |
700 | ret -= con->out_kvec_cur->iov_len; | |
701 | con->out_kvec_cur++; | |
702 | con->out_kvec_left--; | |
703 | } else { | |
704 | con->out_kvec_cur->iov_len -= ret; | |
705 | con->out_kvec_cur->iov_base += ret; | |
706 | ret = 0; | |
707 | break; | |
708 | } | |
709 | } | |
710 | } | |
711 | con->out_kvec_left = 0; | |
712 | con->out_kvec_is_msg = false; | |
713 | ret = 1; | |
714 | out: | |
715 | dout("write_partial_kvec %p %d left in %d kvecs ret = %d\n", con, | |
716 | con->out_kvec_bytes, con->out_kvec_left, ret); | |
717 | return ret; /* done! */ | |
718 | } | |
719 | ||
68b4476b YS |
720 | #ifdef CONFIG_BLOCK |
721 | static void init_bio_iter(struct bio *bio, struct bio **iter, int *seg) | |
722 | { | |
723 | if (!bio) { | |
724 | *iter = NULL; | |
725 | *seg = 0; | |
726 | return; | |
727 | } | |
728 | *iter = bio; | |
729 | *seg = bio->bi_idx; | |
730 | } | |
731 | ||
732 | static void iter_bio_next(struct bio **bio_iter, int *seg) | |
733 | { | |
734 | if (*bio_iter == NULL) | |
735 | return; | |
736 | ||
737 | BUG_ON(*seg >= (*bio_iter)->bi_vcnt); | |
738 | ||
739 | (*seg)++; | |
740 | if (*seg == (*bio_iter)->bi_vcnt) | |
741 | init_bio_iter((*bio_iter)->bi_next, bio_iter, seg); | |
742 | } | |
743 | #endif | |
744 | ||
31b8006e SW |
745 | /* |
746 | * Write as much message data payload as we can. If we finish, queue | |
747 | * up the footer. | |
748 | * 1 -> done, footer is now queued in out_kvec[]. | |
749 | * 0 -> socket full, but more to do | |
750 | * <0 -> error | |
751 | */ | |
752 | static int write_partial_msg_pages(struct ceph_connection *con) | |
753 | { | |
754 | struct ceph_msg *msg = con->out_msg; | |
755 | unsigned data_len = le32_to_cpu(msg->hdr.data_len); | |
756 | size_t len; | |
757 | int crc = con->msgr->nocrc; | |
758 | int ret; | |
68b4476b YS |
759 | int total_max_write; |
760 | int in_trail = 0; | |
761 | size_t trail_len = (msg->trail ? msg->trail->length : 0); | |
31b8006e SW |
762 | |
763 | dout("write_partial_msg_pages %p msg %p page %d/%d offset %d\n", | |
764 | con, con->out_msg, con->out_msg_pos.page, con->out_msg->nr_pages, | |
765 | con->out_msg_pos.page_pos); | |
766 | ||
68b4476b YS |
767 | #ifdef CONFIG_BLOCK |
768 | if (msg->bio && !msg->bio_iter) | |
769 | init_bio_iter(msg->bio, &msg->bio_iter, &msg->bio_seg); | |
770 | #endif | |
771 | ||
772 | while (data_len > con->out_msg_pos.data_pos) { | |
31b8006e SW |
773 | struct page *page = NULL; |
774 | void *kaddr = NULL; | |
68b4476b YS |
775 | int max_write = PAGE_SIZE; |
776 | int page_shift = 0; | |
777 | ||
778 | total_max_write = data_len - trail_len - | |
779 | con->out_msg_pos.data_pos; | |
31b8006e SW |
780 | |
781 | /* | |
782 | * if we are calculating the data crc (the default), we need | |
783 | * to map the page. if our pages[] has been revoked, use the | |
784 | * zero page. | |
785 | */ | |
68b4476b YS |
786 | |
787 | /* have we reached the trail part of the data? */ | |
788 | if (con->out_msg_pos.data_pos >= data_len - trail_len) { | |
789 | in_trail = 1; | |
790 | ||
791 | total_max_write = data_len - con->out_msg_pos.data_pos; | |
792 | ||
793 | page = list_first_entry(&msg->trail->head, | |
794 | struct page, lru); | |
795 | if (crc) | |
796 | kaddr = kmap(page); | |
797 | max_write = PAGE_SIZE; | |
798 | } else if (msg->pages) { | |
31b8006e SW |
799 | page = msg->pages[con->out_msg_pos.page]; |
800 | if (crc) | |
801 | kaddr = kmap(page); | |
58bb3b37 SW |
802 | } else if (msg->pagelist) { |
803 | page = list_first_entry(&msg->pagelist->head, | |
804 | struct page, lru); | |
805 | if (crc) | |
806 | kaddr = kmap(page); | |
68b4476b YS |
807 | #ifdef CONFIG_BLOCK |
808 | } else if (msg->bio) { | |
809 | struct bio_vec *bv; | |
810 | ||
811 | bv = bio_iovec_idx(msg->bio_iter, msg->bio_seg); | |
812 | page = bv->bv_page; | |
813 | page_shift = bv->bv_offset; | |
814 | if (crc) | |
815 | kaddr = kmap(page) + page_shift; | |
816 | max_write = bv->bv_len; | |
817 | #endif | |
31b8006e SW |
818 | } else { |
819 | page = con->msgr->zero_page; | |
820 | if (crc) | |
821 | kaddr = page_address(con->msgr->zero_page); | |
822 | } | |
68b4476b YS |
823 | len = min_t(int, max_write - con->out_msg_pos.page_pos, |
824 | total_max_write); | |
825 | ||
31b8006e SW |
826 | if (crc && !con->out_msg_pos.did_page_crc) { |
827 | void *base = kaddr + con->out_msg_pos.page_pos; | |
828 | u32 tmpcrc = le32_to_cpu(con->out_msg->footer.data_crc); | |
829 | ||
830 | BUG_ON(kaddr == NULL); | |
831 | con->out_msg->footer.data_crc = | |
832 | cpu_to_le32(crc32c(tmpcrc, base, len)); | |
833 | con->out_msg_pos.did_page_crc = 1; | |
834 | } | |
31b8006e | 835 | ret = kernel_sendpage(con->sock, page, |
68b4476b YS |
836 | con->out_msg_pos.page_pos + page_shift, |
837 | len, | |
31b8006e SW |
838 | MSG_DONTWAIT | MSG_NOSIGNAL | |
839 | MSG_MORE); | |
840 | ||
68b4476b YS |
841 | if (crc && |
842 | (msg->pages || msg->pagelist || msg->bio || in_trail)) | |
31b8006e SW |
843 | kunmap(page); |
844 | ||
845 | if (ret <= 0) | |
846 | goto out; | |
847 | ||
848 | con->out_msg_pos.data_pos += ret; | |
849 | con->out_msg_pos.page_pos += ret; | |
850 | if (ret == len) { | |
851 | con->out_msg_pos.page_pos = 0; | |
852 | con->out_msg_pos.page++; | |
853 | con->out_msg_pos.did_page_crc = 0; | |
68b4476b YS |
854 | if (in_trail) |
855 | list_move_tail(&page->lru, | |
856 | &msg->trail->head); | |
857 | else if (msg->pagelist) | |
58bb3b37 SW |
858 | list_move_tail(&page->lru, |
859 | &msg->pagelist->head); | |
68b4476b YS |
860 | #ifdef CONFIG_BLOCK |
861 | else if (msg->bio) | |
862 | iter_bio_next(&msg->bio_iter, &msg->bio_seg); | |
863 | #endif | |
31b8006e SW |
864 | } |
865 | } | |
866 | ||
867 | dout("write_partial_msg_pages %p msg %p done\n", con, msg); | |
868 | ||
869 | /* prepare and queue up footer, too */ | |
870 | if (!crc) | |
871 | con->out_msg->footer.flags |= CEPH_MSG_FOOTER_NOCRC; | |
872 | con->out_kvec_bytes = 0; | |
873 | con->out_kvec_left = 0; | |
874 | con->out_kvec_cur = con->out_kvec; | |
875 | prepare_write_message_footer(con, 0); | |
876 | ret = 1; | |
877 | out: | |
878 | return ret; | |
879 | } | |
880 | ||
881 | /* | |
882 | * write some zeros | |
883 | */ | |
884 | static int write_partial_skip(struct ceph_connection *con) | |
885 | { | |
886 | int ret; | |
887 | ||
888 | while (con->out_skip > 0) { | |
889 | struct kvec iov = { | |
890 | .iov_base = page_address(con->msgr->zero_page), | |
891 | .iov_len = min(con->out_skip, (int)PAGE_CACHE_SIZE) | |
892 | }; | |
893 | ||
894 | ret = ceph_tcp_sendmsg(con->sock, &iov, 1, iov.iov_len, 1); | |
895 | if (ret <= 0) | |
896 | goto out; | |
897 | con->out_skip -= ret; | |
898 | } | |
899 | ret = 1; | |
900 | out: | |
901 | return ret; | |
902 | } | |
903 | ||
904 | /* | |
905 | * Prepare to read connection handshake, or an ack. | |
906 | */ | |
eed0ef2c SW |
907 | static void prepare_read_banner(struct ceph_connection *con) |
908 | { | |
909 | dout("prepare_read_banner %p\n", con); | |
910 | con->in_base_pos = 0; | |
911 | } | |
912 | ||
31b8006e SW |
913 | static void prepare_read_connect(struct ceph_connection *con) |
914 | { | |
915 | dout("prepare_read_connect %p\n", con); | |
916 | con->in_base_pos = 0; | |
917 | } | |
918 | ||
919 | static void prepare_read_ack(struct ceph_connection *con) | |
920 | { | |
921 | dout("prepare_read_ack %p\n", con); | |
922 | con->in_base_pos = 0; | |
923 | } | |
924 | ||
925 | static void prepare_read_tag(struct ceph_connection *con) | |
926 | { | |
927 | dout("prepare_read_tag %p\n", con); | |
928 | con->in_base_pos = 0; | |
929 | con->in_tag = CEPH_MSGR_TAG_READY; | |
930 | } | |
931 | ||
932 | /* | |
933 | * Prepare to read a message. | |
934 | */ | |
935 | static int prepare_read_message(struct ceph_connection *con) | |
936 | { | |
937 | dout("prepare_read_message %p\n", con); | |
938 | BUG_ON(con->in_msg != NULL); | |
939 | con->in_base_pos = 0; | |
940 | con->in_front_crc = con->in_middle_crc = con->in_data_crc = 0; | |
941 | return 0; | |
942 | } | |
943 | ||
944 | ||
945 | static int read_partial(struct ceph_connection *con, | |
946 | int *to, int size, void *object) | |
947 | { | |
948 | *to += size; | |
949 | while (con->in_base_pos < *to) { | |
950 | int left = *to - con->in_base_pos; | |
951 | int have = size - left; | |
952 | int ret = ceph_tcp_recvmsg(con->sock, object + have, left); | |
953 | if (ret <= 0) | |
954 | return ret; | |
955 | con->in_base_pos += ret; | |
956 | } | |
957 | return 1; | |
958 | } | |
959 | ||
960 | ||
961 | /* | |
962 | * Read all or part of the connect-side handshake on a new connection | |
963 | */ | |
eed0ef2c | 964 | static int read_partial_banner(struct ceph_connection *con) |
31b8006e SW |
965 | { |
966 | int ret, to = 0; | |
967 | ||
eed0ef2c | 968 | dout("read_partial_banner %p at %d\n", con, con->in_base_pos); |
31b8006e SW |
969 | |
970 | /* peer's banner */ | |
971 | ret = read_partial(con, &to, strlen(CEPH_BANNER), con->in_banner); | |
972 | if (ret <= 0) | |
973 | goto out; | |
974 | ret = read_partial(con, &to, sizeof(con->actual_peer_addr), | |
975 | &con->actual_peer_addr); | |
976 | if (ret <= 0) | |
977 | goto out; | |
978 | ret = read_partial(con, &to, sizeof(con->peer_addr_for_me), | |
979 | &con->peer_addr_for_me); | |
980 | if (ret <= 0) | |
981 | goto out; | |
eed0ef2c SW |
982 | out: |
983 | return ret; | |
984 | } | |
985 | ||
986 | static int read_partial_connect(struct ceph_connection *con) | |
987 | { | |
988 | int ret, to = 0; | |
989 | ||
990 | dout("read_partial_connect %p at %d\n", con, con->in_base_pos); | |
991 | ||
31b8006e SW |
992 | ret = read_partial(con, &to, sizeof(con->in_reply), &con->in_reply); |
993 | if (ret <= 0) | |
994 | goto out; | |
4e7a5dcd SW |
995 | ret = read_partial(con, &to, le32_to_cpu(con->in_reply.authorizer_len), |
996 | con->auth_reply_buf); | |
997 | if (ret <= 0) | |
998 | goto out; | |
31b8006e | 999 | |
4e7a5dcd SW |
1000 | dout("read_partial_connect %p tag %d, con_seq = %u, g_seq = %u\n", |
1001 | con, (int)con->in_reply.tag, | |
1002 | le32_to_cpu(con->in_reply.connect_seq), | |
31b8006e SW |
1003 | le32_to_cpu(con->in_reply.global_seq)); |
1004 | out: | |
1005 | return ret; | |
eed0ef2c | 1006 | |
31b8006e SW |
1007 | } |
1008 | ||
1009 | /* | |
1010 | * Verify the hello banner looks okay. | |
1011 | */ | |
1012 | static int verify_hello(struct ceph_connection *con) | |
1013 | { | |
1014 | if (memcmp(con->in_banner, CEPH_BANNER, strlen(CEPH_BANNER))) { | |
13e38c8a | 1015 | pr_err("connect to %s got bad banner\n", |
31b8006e SW |
1016 | pr_addr(&con->peer_addr.in_addr)); |
1017 | con->error_msg = "protocol error, bad banner"; | |
1018 | return -1; | |
1019 | } | |
1020 | return 0; | |
1021 | } | |
1022 | ||
1023 | static bool addr_is_blank(struct sockaddr_storage *ss) | |
1024 | { | |
1025 | switch (ss->ss_family) { | |
1026 | case AF_INET: | |
1027 | return ((struct sockaddr_in *)ss)->sin_addr.s_addr == 0; | |
1028 | case AF_INET6: | |
1029 | return | |
1030 | ((struct sockaddr_in6 *)ss)->sin6_addr.s6_addr32[0] == 0 && | |
1031 | ((struct sockaddr_in6 *)ss)->sin6_addr.s6_addr32[1] == 0 && | |
1032 | ((struct sockaddr_in6 *)ss)->sin6_addr.s6_addr32[2] == 0 && | |
1033 | ((struct sockaddr_in6 *)ss)->sin6_addr.s6_addr32[3] == 0; | |
1034 | } | |
1035 | return false; | |
1036 | } | |
1037 | ||
1038 | static int addr_port(struct sockaddr_storage *ss) | |
1039 | { | |
1040 | switch (ss->ss_family) { | |
1041 | case AF_INET: | |
f28bcfbe | 1042 | return ntohs(((struct sockaddr_in *)ss)->sin_port); |
31b8006e | 1043 | case AF_INET6: |
f28bcfbe | 1044 | return ntohs(((struct sockaddr_in6 *)ss)->sin6_port); |
31b8006e SW |
1045 | } |
1046 | return 0; | |
1047 | } | |
1048 | ||
1049 | static void addr_set_port(struct sockaddr_storage *ss, int p) | |
1050 | { | |
1051 | switch (ss->ss_family) { | |
1052 | case AF_INET: | |
1053 | ((struct sockaddr_in *)ss)->sin_port = htons(p); | |
1054 | case AF_INET6: | |
1055 | ((struct sockaddr_in6 *)ss)->sin6_port = htons(p); | |
1056 | } | |
1057 | } | |
1058 | ||
1059 | /* | |
1060 | * Parse an ip[:port] list into an addr array. Use the default | |
1061 | * monitor port if a port isn't specified. | |
1062 | */ | |
1063 | int ceph_parse_ips(const char *c, const char *end, | |
1064 | struct ceph_entity_addr *addr, | |
1065 | int max_count, int *count) | |
1066 | { | |
1067 | int i; | |
1068 | const char *p = c; | |
1069 | ||
1070 | dout("parse_ips on '%.*s'\n", (int)(end-c), c); | |
1071 | for (i = 0; i < max_count; i++) { | |
1072 | const char *ipend; | |
1073 | struct sockaddr_storage *ss = &addr[i].in_addr; | |
1074 | struct sockaddr_in *in4 = (void *)ss; | |
1075 | struct sockaddr_in6 *in6 = (void *)ss; | |
1076 | int port; | |
39139f64 SW |
1077 | char delim = ','; |
1078 | ||
1079 | if (*p == '[') { | |
1080 | delim = ']'; | |
1081 | p++; | |
1082 | } | |
31b8006e SW |
1083 | |
1084 | memset(ss, 0, sizeof(*ss)); | |
1085 | if (in4_pton(p, end - p, (u8 *)&in4->sin_addr.s_addr, | |
39139f64 | 1086 | delim, &ipend)) |
31b8006e | 1087 | ss->ss_family = AF_INET; |
39139f64 SW |
1088 | else if (in6_pton(p, end - p, (u8 *)&in6->sin6_addr.s6_addr, |
1089 | delim, &ipend)) | |
31b8006e | 1090 | ss->ss_family = AF_INET6; |
39139f64 | 1091 | else |
31b8006e | 1092 | goto bad; |
31b8006e SW |
1093 | p = ipend; |
1094 | ||
39139f64 SW |
1095 | if (delim == ']') { |
1096 | if (*p != ']') { | |
1097 | dout("missing matching ']'\n"); | |
1098 | goto bad; | |
1099 | } | |
1100 | p++; | |
1101 | } | |
1102 | ||
31b8006e SW |
1103 | /* port? */ |
1104 | if (p < end && *p == ':') { | |
1105 | port = 0; | |
1106 | p++; | |
1107 | while (p < end && *p >= '0' && *p <= '9') { | |
1108 | port = (port * 10) + (*p - '0'); | |
1109 | p++; | |
1110 | } | |
1111 | if (port > 65535 || port == 0) | |
1112 | goto bad; | |
1113 | } else { | |
1114 | port = CEPH_MON_PORT; | |
1115 | } | |
1116 | ||
1117 | addr_set_port(ss, port); | |
1118 | ||
1119 | dout("parse_ips got %s\n", pr_addr(ss)); | |
1120 | ||
1121 | if (p == end) | |
1122 | break; | |
1123 | if (*p != ',') | |
1124 | goto bad; | |
1125 | p++; | |
1126 | } | |
1127 | ||
1128 | if (p != end) | |
1129 | goto bad; | |
1130 | ||
1131 | if (count) | |
1132 | *count = i + 1; | |
1133 | return 0; | |
1134 | ||
1135 | bad: | |
39139f64 | 1136 | pr_err("parse_ips bad ip '%.*s'\n", (int)(end - c), c); |
31b8006e SW |
1137 | return -EINVAL; |
1138 | } | |
1139 | ||
eed0ef2c | 1140 | static int process_banner(struct ceph_connection *con) |
31b8006e | 1141 | { |
eed0ef2c | 1142 | dout("process_banner on %p\n", con); |
31b8006e SW |
1143 | |
1144 | if (verify_hello(con) < 0) | |
1145 | return -1; | |
1146 | ||
63f2d211 SW |
1147 | ceph_decode_addr(&con->actual_peer_addr); |
1148 | ceph_decode_addr(&con->peer_addr_for_me); | |
1149 | ||
31b8006e SW |
1150 | /* |
1151 | * Make sure the other end is who we wanted. note that the other | |
1152 | * end may not yet know their ip address, so if it's 0.0.0.0, give | |
1153 | * them the benefit of the doubt. | |
1154 | */ | |
103e2d3a SW |
1155 | if (memcmp(&con->peer_addr, &con->actual_peer_addr, |
1156 | sizeof(con->peer_addr)) != 0 && | |
31b8006e SW |
1157 | !(addr_is_blank(&con->actual_peer_addr.in_addr) && |
1158 | con->actual_peer_addr.nonce == con->peer_addr.nonce)) { | |
cd84db6e | 1159 | pr_warning("wrong peer, want %s/%d, got %s/%d\n", |
103e2d3a | 1160 | pr_addr(&con->peer_addr.in_addr), |
cd84db6e | 1161 | (int)le32_to_cpu(con->peer_addr.nonce), |
103e2d3a | 1162 | pr_addr(&con->actual_peer_addr.in_addr), |
cd84db6e | 1163 | (int)le32_to_cpu(con->actual_peer_addr.nonce)); |
58bb3b37 | 1164 | con->error_msg = "wrong peer at address"; |
31b8006e SW |
1165 | return -1; |
1166 | } | |
1167 | ||
1168 | /* | |
1169 | * did we learn our address? | |
1170 | */ | |
1171 | if (addr_is_blank(&con->msgr->inst.addr.in_addr)) { | |
1172 | int port = addr_port(&con->msgr->inst.addr.in_addr); | |
1173 | ||
1174 | memcpy(&con->msgr->inst.addr.in_addr, | |
1175 | &con->peer_addr_for_me.in_addr, | |
1176 | sizeof(con->peer_addr_for_me.in_addr)); | |
1177 | addr_set_port(&con->msgr->inst.addr.in_addr, port); | |
63f2d211 | 1178 | encode_my_addr(con->msgr); |
eed0ef2c | 1179 | dout("process_banner learned my addr is %s\n", |
31b8006e SW |
1180 | pr_addr(&con->msgr->inst.addr.in_addr)); |
1181 | } | |
1182 | ||
eed0ef2c SW |
1183 | set_bit(NEGOTIATING, &con->state); |
1184 | prepare_read_connect(con); | |
1185 | return 0; | |
1186 | } | |
1187 | ||
04a419f9 SW |
1188 | static void fail_protocol(struct ceph_connection *con) |
1189 | { | |
1190 | reset_connection(con); | |
1191 | set_bit(CLOSED, &con->state); /* in case there's queued work */ | |
1192 | ||
1193 | mutex_unlock(&con->mutex); | |
1194 | if (con->ops->bad_proto) | |
1195 | con->ops->bad_proto(con); | |
1196 | mutex_lock(&con->mutex); | |
1197 | } | |
1198 | ||
eed0ef2c SW |
1199 | static int process_connect(struct ceph_connection *con) |
1200 | { | |
6a259382 SW |
1201 | u64 sup_feat = CEPH_FEATURE_SUPPORTED; |
1202 | u64 req_feat = CEPH_FEATURE_REQUIRED; | |
04a419f9 SW |
1203 | u64 server_feat = le64_to_cpu(con->in_reply.features); |
1204 | ||
eed0ef2c SW |
1205 | dout("process_connect on %p tag %d\n", con, (int)con->in_tag); |
1206 | ||
31b8006e | 1207 | switch (con->in_reply.tag) { |
04a419f9 SW |
1208 | case CEPH_MSGR_TAG_FEATURES: |
1209 | pr_err("%s%lld %s feature set mismatch," | |
1210 | " my %llx < server's %llx, missing %llx\n", | |
1211 | ENTITY_NAME(con->peer_name), | |
1212 | pr_addr(&con->peer_addr.in_addr), | |
1213 | sup_feat, server_feat, server_feat & ~sup_feat); | |
1214 | con->error_msg = "missing required protocol features"; | |
1215 | fail_protocol(con); | |
1216 | return -1; | |
1217 | ||
31b8006e | 1218 | case CEPH_MSGR_TAG_BADPROTOVER: |
31b8006e SW |
1219 | pr_err("%s%lld %s protocol version mismatch," |
1220 | " my %d != server's %d\n", | |
1221 | ENTITY_NAME(con->peer_name), | |
1222 | pr_addr(&con->peer_addr.in_addr), | |
1223 | le32_to_cpu(con->out_connect.protocol_version), | |
1224 | le32_to_cpu(con->in_reply.protocol_version)); | |
1225 | con->error_msg = "protocol version mismatch"; | |
04a419f9 | 1226 | fail_protocol(con); |
31b8006e SW |
1227 | return -1; |
1228 | ||
4e7a5dcd SW |
1229 | case CEPH_MSGR_TAG_BADAUTHORIZER: |
1230 | con->auth_retry++; | |
1231 | dout("process_connect %p got BADAUTHORIZER attempt %d\n", con, | |
1232 | con->auth_retry); | |
1233 | if (con->auth_retry == 2) { | |
1234 | con->error_msg = "connect authorization failure"; | |
1235 | reset_connection(con); | |
1236 | set_bit(CLOSED, &con->state); | |
1237 | return -1; | |
1238 | } | |
1239 | con->auth_retry = 1; | |
1240 | prepare_write_connect(con->msgr, con, 0); | |
63733a0f | 1241 | prepare_read_connect(con); |
4e7a5dcd | 1242 | break; |
31b8006e SW |
1243 | |
1244 | case CEPH_MSGR_TAG_RESETSESSION: | |
1245 | /* | |
1246 | * If we connected with a large connect_seq but the peer | |
1247 | * has no record of a session with us (no connection, or | |
1248 | * connect_seq == 0), they will send RESETSESION to indicate | |
1249 | * that they must have reset their session, and may have | |
1250 | * dropped messages. | |
1251 | */ | |
1252 | dout("process_connect got RESET peer seq %u\n", | |
1253 | le32_to_cpu(con->in_connect.connect_seq)); | |
1254 | pr_err("%s%lld %s connection reset\n", | |
1255 | ENTITY_NAME(con->peer_name), | |
1256 | pr_addr(&con->peer_addr.in_addr)); | |
1257 | reset_connection(con); | |
eed0ef2c | 1258 | prepare_write_connect(con->msgr, con, 0); |
31b8006e SW |
1259 | prepare_read_connect(con); |
1260 | ||
1261 | /* Tell ceph about it. */ | |
ec302645 | 1262 | mutex_unlock(&con->mutex); |
31b8006e SW |
1263 | pr_info("reset on %s%lld\n", ENTITY_NAME(con->peer_name)); |
1264 | if (con->ops->peer_reset) | |
1265 | con->ops->peer_reset(con); | |
ec302645 | 1266 | mutex_lock(&con->mutex); |
31b8006e SW |
1267 | break; |
1268 | ||
1269 | case CEPH_MSGR_TAG_RETRY_SESSION: | |
1270 | /* | |
1271 | * If we sent a smaller connect_seq than the peer has, try | |
1272 | * again with a larger value. | |
1273 | */ | |
1274 | dout("process_connect got RETRY my seq = %u, peer_seq = %u\n", | |
1275 | le32_to_cpu(con->out_connect.connect_seq), | |
1276 | le32_to_cpu(con->in_connect.connect_seq)); | |
1277 | con->connect_seq = le32_to_cpu(con->in_connect.connect_seq); | |
eed0ef2c | 1278 | prepare_write_connect(con->msgr, con, 0); |
31b8006e SW |
1279 | prepare_read_connect(con); |
1280 | break; | |
1281 | ||
1282 | case CEPH_MSGR_TAG_RETRY_GLOBAL: | |
1283 | /* | |
1284 | * If we sent a smaller global_seq than the peer has, try | |
1285 | * again with a larger value. | |
1286 | */ | |
eed0ef2c | 1287 | dout("process_connect got RETRY_GLOBAL my %u peer_gseq %u\n", |
31b8006e SW |
1288 | con->peer_global_seq, |
1289 | le32_to_cpu(con->in_connect.global_seq)); | |
1290 | get_global_seq(con->msgr, | |
1291 | le32_to_cpu(con->in_connect.global_seq)); | |
eed0ef2c | 1292 | prepare_write_connect(con->msgr, con, 0); |
31b8006e SW |
1293 | prepare_read_connect(con); |
1294 | break; | |
1295 | ||
1296 | case CEPH_MSGR_TAG_READY: | |
04a419f9 SW |
1297 | if (req_feat & ~server_feat) { |
1298 | pr_err("%s%lld %s protocol feature mismatch," | |
1299 | " my required %llx > server's %llx, need %llx\n", | |
1300 | ENTITY_NAME(con->peer_name), | |
1301 | pr_addr(&con->peer_addr.in_addr), | |
1302 | req_feat, server_feat, req_feat & ~server_feat); | |
1303 | con->error_msg = "missing required protocol features"; | |
1304 | fail_protocol(con); | |
1305 | return -1; | |
1306 | } | |
31b8006e | 1307 | clear_bit(CONNECTING, &con->state); |
31b8006e SW |
1308 | con->peer_global_seq = le32_to_cpu(con->in_reply.global_seq); |
1309 | con->connect_seq++; | |
aba558e2 | 1310 | con->peer_features = server_feat; |
31b8006e SW |
1311 | dout("process_connect got READY gseq %d cseq %d (%d)\n", |
1312 | con->peer_global_seq, | |
1313 | le32_to_cpu(con->in_reply.connect_seq), | |
1314 | con->connect_seq); | |
1315 | WARN_ON(con->connect_seq != | |
1316 | le32_to_cpu(con->in_reply.connect_seq)); | |
92ac41d0 SW |
1317 | |
1318 | if (con->in_reply.flags & CEPH_MSG_CONNECT_LOSSY) | |
1319 | set_bit(LOSSYTX, &con->state); | |
1320 | ||
31b8006e SW |
1321 | prepare_read_tag(con); |
1322 | break; | |
1323 | ||
1324 | case CEPH_MSGR_TAG_WAIT: | |
1325 | /* | |
1326 | * If there is a connection race (we are opening | |
1327 | * connections to each other), one of us may just have | |
1328 | * to WAIT. This shouldn't happen if we are the | |
1329 | * client. | |
1330 | */ | |
1331 | pr_err("process_connect peer connecting WAIT\n"); | |
1332 | ||
1333 | default: | |
1334 | pr_err("connect protocol error, will retry\n"); | |
1335 | con->error_msg = "protocol error, garbage tag during connect"; | |
1336 | return -1; | |
1337 | } | |
1338 | return 0; | |
1339 | } | |
1340 | ||
1341 | ||
1342 | /* | |
1343 | * read (part of) an ack | |
1344 | */ | |
1345 | static int read_partial_ack(struct ceph_connection *con) | |
1346 | { | |
1347 | int to = 0; | |
1348 | ||
1349 | return read_partial(con, &to, sizeof(con->in_temp_ack), | |
1350 | &con->in_temp_ack); | |
1351 | } | |
1352 | ||
1353 | ||
1354 | /* | |
1355 | * We can finally discard anything that's been acked. | |
1356 | */ | |
1357 | static void process_ack(struct ceph_connection *con) | |
1358 | { | |
1359 | struct ceph_msg *m; | |
1360 | u64 ack = le64_to_cpu(con->in_temp_ack); | |
1361 | u64 seq; | |
1362 | ||
31b8006e SW |
1363 | while (!list_empty(&con->out_sent)) { |
1364 | m = list_first_entry(&con->out_sent, struct ceph_msg, | |
1365 | list_head); | |
1366 | seq = le64_to_cpu(m->hdr.seq); | |
1367 | if (seq > ack) | |
1368 | break; | |
1369 | dout("got ack for seq %llu type %d at %p\n", seq, | |
1370 | le16_to_cpu(m->hdr.type), m); | |
1371 | ceph_msg_remove(m); | |
1372 | } | |
31b8006e SW |
1373 | prepare_read_tag(con); |
1374 | } | |
1375 | ||
1376 | ||
1377 | ||
1378 | ||
2450418c | 1379 | static int read_partial_message_section(struct ceph_connection *con, |
213c99ee SW |
1380 | struct kvec *section, |
1381 | unsigned int sec_len, u32 *crc) | |
2450418c | 1382 | { |
68b4476b | 1383 | int ret, left; |
2450418c YS |
1384 | |
1385 | BUG_ON(!section); | |
1386 | ||
1387 | while (section->iov_len < sec_len) { | |
1388 | BUG_ON(section->iov_base == NULL); | |
1389 | left = sec_len - section->iov_len; | |
1390 | ret = ceph_tcp_recvmsg(con->sock, (char *)section->iov_base + | |
1391 | section->iov_len, left); | |
1392 | if (ret <= 0) | |
1393 | return ret; | |
1394 | section->iov_len += ret; | |
1395 | if (section->iov_len == sec_len) | |
1396 | *crc = crc32c(0, section->iov_base, | |
1397 | section->iov_len); | |
1398 | } | |
31b8006e | 1399 | |
2450418c YS |
1400 | return 1; |
1401 | } | |
31b8006e | 1402 | |
2450418c YS |
1403 | static struct ceph_msg *ceph_alloc_msg(struct ceph_connection *con, |
1404 | struct ceph_msg_header *hdr, | |
1405 | int *skip); | |
68b4476b YS |
1406 | |
1407 | ||
1408 | static int read_partial_message_pages(struct ceph_connection *con, | |
1409 | struct page **pages, | |
1410 | unsigned data_len, int datacrc) | |
1411 | { | |
1412 | void *p; | |
1413 | int ret; | |
1414 | int left; | |
1415 | ||
1416 | left = min((int)(data_len - con->in_msg_pos.data_pos), | |
1417 | (int)(PAGE_SIZE - con->in_msg_pos.page_pos)); | |
1418 | /* (page) data */ | |
1419 | BUG_ON(pages == NULL); | |
1420 | p = kmap(pages[con->in_msg_pos.page]); | |
1421 | ret = ceph_tcp_recvmsg(con->sock, p + con->in_msg_pos.page_pos, | |
1422 | left); | |
1423 | if (ret > 0 && datacrc) | |
1424 | con->in_data_crc = | |
1425 | crc32c(con->in_data_crc, | |
1426 | p + con->in_msg_pos.page_pos, ret); | |
1427 | kunmap(pages[con->in_msg_pos.page]); | |
1428 | if (ret <= 0) | |
1429 | return ret; | |
1430 | con->in_msg_pos.data_pos += ret; | |
1431 | con->in_msg_pos.page_pos += ret; | |
1432 | if (con->in_msg_pos.page_pos == PAGE_SIZE) { | |
1433 | con->in_msg_pos.page_pos = 0; | |
1434 | con->in_msg_pos.page++; | |
1435 | } | |
1436 | ||
1437 | return ret; | |
1438 | } | |
1439 | ||
1440 | #ifdef CONFIG_BLOCK | |
1441 | static int read_partial_message_bio(struct ceph_connection *con, | |
1442 | struct bio **bio_iter, int *bio_seg, | |
1443 | unsigned data_len, int datacrc) | |
1444 | { | |
1445 | struct bio_vec *bv = bio_iovec_idx(*bio_iter, *bio_seg); | |
1446 | void *p; | |
1447 | int ret, left; | |
1448 | ||
1449 | if (IS_ERR(bv)) | |
1450 | return PTR_ERR(bv); | |
1451 | ||
1452 | left = min((int)(data_len - con->in_msg_pos.data_pos), | |
1453 | (int)(bv->bv_len - con->in_msg_pos.page_pos)); | |
1454 | ||
1455 | p = kmap(bv->bv_page) + bv->bv_offset; | |
1456 | ||
1457 | ret = ceph_tcp_recvmsg(con->sock, p + con->in_msg_pos.page_pos, | |
1458 | left); | |
1459 | if (ret > 0 && datacrc) | |
1460 | con->in_data_crc = | |
1461 | crc32c(con->in_data_crc, | |
1462 | p + con->in_msg_pos.page_pos, ret); | |
1463 | kunmap(bv->bv_page); | |
1464 | if (ret <= 0) | |
1465 | return ret; | |
1466 | con->in_msg_pos.data_pos += ret; | |
1467 | con->in_msg_pos.page_pos += ret; | |
1468 | if (con->in_msg_pos.page_pos == bv->bv_len) { | |
1469 | con->in_msg_pos.page_pos = 0; | |
1470 | iter_bio_next(bio_iter, bio_seg); | |
1471 | } | |
1472 | ||
1473 | return ret; | |
1474 | } | |
1475 | #endif | |
1476 | ||
31b8006e SW |
1477 | /* |
1478 | * read (part of) a message. | |
1479 | */ | |
1480 | static int read_partial_message(struct ceph_connection *con) | |
1481 | { | |
1482 | struct ceph_msg *m = con->in_msg; | |
31b8006e | 1483 | int ret; |
9d7f0f13 | 1484 | int to, left; |
31b8006e SW |
1485 | unsigned front_len, middle_len, data_len, data_off; |
1486 | int datacrc = con->msgr->nocrc; | |
2450418c | 1487 | int skip; |
ae18756b | 1488 | u64 seq; |
31b8006e SW |
1489 | |
1490 | dout("read_partial_message con %p msg %p\n", con, m); | |
1491 | ||
1492 | /* header */ | |
1493 | while (con->in_base_pos < sizeof(con->in_hdr)) { | |
1494 | left = sizeof(con->in_hdr) - con->in_base_pos; | |
1495 | ret = ceph_tcp_recvmsg(con->sock, | |
1496 | (char *)&con->in_hdr + con->in_base_pos, | |
1497 | left); | |
1498 | if (ret <= 0) | |
1499 | return ret; | |
1500 | con->in_base_pos += ret; | |
1501 | if (con->in_base_pos == sizeof(con->in_hdr)) { | |
1502 | u32 crc = crc32c(0, (void *)&con->in_hdr, | |
1503 | sizeof(con->in_hdr) - sizeof(con->in_hdr.crc)); | |
1504 | if (crc != le32_to_cpu(con->in_hdr.crc)) { | |
1505 | pr_err("read_partial_message bad hdr " | |
1506 | " crc %u != expected %u\n", | |
1507 | crc, con->in_hdr.crc); | |
1508 | return -EBADMSG; | |
1509 | } | |
1510 | } | |
1511 | } | |
31b8006e SW |
1512 | front_len = le32_to_cpu(con->in_hdr.front_len); |
1513 | if (front_len > CEPH_MSG_MAX_FRONT_LEN) | |
1514 | return -EIO; | |
1515 | middle_len = le32_to_cpu(con->in_hdr.middle_len); | |
1516 | if (middle_len > CEPH_MSG_MAX_DATA_LEN) | |
1517 | return -EIO; | |
1518 | data_len = le32_to_cpu(con->in_hdr.data_len); | |
1519 | if (data_len > CEPH_MSG_MAX_DATA_LEN) | |
1520 | return -EIO; | |
9d7f0f13 | 1521 | data_off = le16_to_cpu(con->in_hdr.data_off); |
31b8006e | 1522 | |
ae18756b SW |
1523 | /* verify seq# */ |
1524 | seq = le64_to_cpu(con->in_hdr.seq); | |
1525 | if ((s64)seq - (s64)con->in_seq < 1) { | |
1526 | pr_info("skipping %s%lld %s seq %lld, expected %lld\n", | |
1527 | ENTITY_NAME(con->peer_name), | |
1528 | pr_addr(&con->peer_addr.in_addr), | |
1529 | seq, con->in_seq + 1); | |
1530 | con->in_base_pos = -front_len - middle_len - data_len - | |
1531 | sizeof(m->footer); | |
1532 | con->in_tag = CEPH_MSGR_TAG_READY; | |
1533 | con->in_seq++; | |
1534 | return 0; | |
1535 | } else if ((s64)seq - (s64)con->in_seq > 1) { | |
1536 | pr_err("read_partial_message bad seq %lld expected %lld\n", | |
1537 | seq, con->in_seq + 1); | |
1538 | con->error_msg = "bad message sequence # for incoming message"; | |
1539 | return -EBADMSG; | |
1540 | } | |
1541 | ||
31b8006e SW |
1542 | /* allocate message? */ |
1543 | if (!con->in_msg) { | |
1544 | dout("got hdr type %d front %d data %d\n", con->in_hdr.type, | |
1545 | con->in_hdr.front_len, con->in_hdr.data_len); | |
ae32be31 | 1546 | skip = 0; |
2450418c YS |
1547 | con->in_msg = ceph_alloc_msg(con, &con->in_hdr, &skip); |
1548 | if (skip) { | |
31b8006e | 1549 | /* skip this message */ |
a79832f2 | 1550 | dout("alloc_msg said skip message\n"); |
ae32be31 | 1551 | BUG_ON(con->in_msg); |
31b8006e SW |
1552 | con->in_base_pos = -front_len - middle_len - data_len - |
1553 | sizeof(m->footer); | |
1554 | con->in_tag = CEPH_MSGR_TAG_READY; | |
684be25c | 1555 | con->in_seq++; |
31b8006e SW |
1556 | return 0; |
1557 | } | |
a79832f2 | 1558 | if (!con->in_msg) { |
5b3a4db3 SW |
1559 | con->error_msg = |
1560 | "error allocating memory for incoming message"; | |
a79832f2 | 1561 | return -ENOMEM; |
31b8006e SW |
1562 | } |
1563 | m = con->in_msg; | |
1564 | m->front.iov_len = 0; /* haven't read it yet */ | |
2450418c YS |
1565 | if (m->middle) |
1566 | m->middle->vec.iov_len = 0; | |
9d7f0f13 YS |
1567 | |
1568 | con->in_msg_pos.page = 0; | |
68b4476b YS |
1569 | if (m->pages) |
1570 | con->in_msg_pos.page_pos = data_off & ~PAGE_MASK; | |
1571 | else | |
1572 | con->in_msg_pos.page_pos = 0; | |
9d7f0f13 | 1573 | con->in_msg_pos.data_pos = 0; |
31b8006e SW |
1574 | } |
1575 | ||
1576 | /* front */ | |
2450418c YS |
1577 | ret = read_partial_message_section(con, &m->front, front_len, |
1578 | &con->in_front_crc); | |
1579 | if (ret <= 0) | |
1580 | return ret; | |
31b8006e SW |
1581 | |
1582 | /* middle */ | |
2450418c | 1583 | if (m->middle) { |
213c99ee SW |
1584 | ret = read_partial_message_section(con, &m->middle->vec, |
1585 | middle_len, | |
2450418c | 1586 | &con->in_middle_crc); |
31b8006e SW |
1587 | if (ret <= 0) |
1588 | return ret; | |
31b8006e | 1589 | } |
68b4476b YS |
1590 | #ifdef CONFIG_BLOCK |
1591 | if (m->bio && !m->bio_iter) | |
1592 | init_bio_iter(m->bio, &m->bio_iter, &m->bio_seg); | |
1593 | #endif | |
31b8006e SW |
1594 | |
1595 | /* (page) data */ | |
31b8006e | 1596 | while (con->in_msg_pos.data_pos < data_len) { |
68b4476b YS |
1597 | if (m->pages) { |
1598 | ret = read_partial_message_pages(con, m->pages, | |
1599 | data_len, datacrc); | |
1600 | if (ret <= 0) | |
1601 | return ret; | |
1602 | #ifdef CONFIG_BLOCK | |
1603 | } else if (m->bio) { | |
1604 | ||
1605 | ret = read_partial_message_bio(con, | |
1606 | &m->bio_iter, &m->bio_seg, | |
1607 | data_len, datacrc); | |
1608 | if (ret <= 0) | |
1609 | return ret; | |
1610 | #endif | |
1611 | } else { | |
1612 | BUG_ON(1); | |
31b8006e SW |
1613 | } |
1614 | } | |
1615 | ||
31b8006e SW |
1616 | /* footer */ |
1617 | to = sizeof(m->hdr) + sizeof(m->footer); | |
1618 | while (con->in_base_pos < to) { | |
1619 | left = to - con->in_base_pos; | |
1620 | ret = ceph_tcp_recvmsg(con->sock, (char *)&m->footer + | |
1621 | (con->in_base_pos - sizeof(m->hdr)), | |
1622 | left); | |
1623 | if (ret <= 0) | |
1624 | return ret; | |
1625 | con->in_base_pos += ret; | |
1626 | } | |
1627 | dout("read_partial_message got msg %p %d (%u) + %d (%u) + %d (%u)\n", | |
1628 | m, front_len, m->footer.front_crc, middle_len, | |
1629 | m->footer.middle_crc, data_len, m->footer.data_crc); | |
1630 | ||
1631 | /* crc ok? */ | |
1632 | if (con->in_front_crc != le32_to_cpu(m->footer.front_crc)) { | |
1633 | pr_err("read_partial_message %p front crc %u != exp. %u\n", | |
1634 | m, con->in_front_crc, m->footer.front_crc); | |
1635 | return -EBADMSG; | |
1636 | } | |
1637 | if (con->in_middle_crc != le32_to_cpu(m->footer.middle_crc)) { | |
1638 | pr_err("read_partial_message %p middle crc %u != exp %u\n", | |
1639 | m, con->in_middle_crc, m->footer.middle_crc); | |
1640 | return -EBADMSG; | |
1641 | } | |
1642 | if (datacrc && | |
1643 | (m->footer.flags & CEPH_MSG_FOOTER_NOCRC) == 0 && | |
1644 | con->in_data_crc != le32_to_cpu(m->footer.data_crc)) { | |
1645 | pr_err("read_partial_message %p data crc %u != exp. %u\n", m, | |
1646 | con->in_data_crc, le32_to_cpu(m->footer.data_crc)); | |
1647 | return -EBADMSG; | |
1648 | } | |
1649 | ||
1650 | return 1; /* done! */ | |
1651 | } | |
1652 | ||
1653 | /* | |
1654 | * Process message. This happens in the worker thread. The callback should | |
1655 | * be careful not to do anything that waits on other incoming messages or it | |
1656 | * may deadlock. | |
1657 | */ | |
1658 | static void process_message(struct ceph_connection *con) | |
1659 | { | |
5e095e8b | 1660 | struct ceph_msg *msg; |
31b8006e | 1661 | |
5e095e8b | 1662 | msg = con->in_msg; |
31b8006e SW |
1663 | con->in_msg = NULL; |
1664 | ||
1665 | /* if first message, set peer_name */ | |
1666 | if (con->peer_name.type == 0) | |
dbad185d | 1667 | con->peer_name = msg->hdr.src; |
31b8006e | 1668 | |
31b8006e | 1669 | con->in_seq++; |
ec302645 | 1670 | mutex_unlock(&con->mutex); |
31b8006e SW |
1671 | |
1672 | dout("===== %p %llu from %s%lld %d=%s len %d+%d (%u %u %u) =====\n", | |
1673 | msg, le64_to_cpu(msg->hdr.seq), | |
dbad185d | 1674 | ENTITY_NAME(msg->hdr.src), |
31b8006e SW |
1675 | le16_to_cpu(msg->hdr.type), |
1676 | ceph_msg_type_name(le16_to_cpu(msg->hdr.type)), | |
1677 | le32_to_cpu(msg->hdr.front_len), | |
1678 | le32_to_cpu(msg->hdr.data_len), | |
1679 | con->in_front_crc, con->in_middle_crc, con->in_data_crc); | |
1680 | con->ops->dispatch(con, msg); | |
ec302645 SW |
1681 | |
1682 | mutex_lock(&con->mutex); | |
31b8006e SW |
1683 | prepare_read_tag(con); |
1684 | } | |
1685 | ||
1686 | ||
1687 | /* | |
1688 | * Write something to the socket. Called in a worker thread when the | |
1689 | * socket appears to be writeable and we have something ready to send. | |
1690 | */ | |
1691 | static int try_write(struct ceph_connection *con) | |
1692 | { | |
1693 | struct ceph_messenger *msgr = con->msgr; | |
1694 | int ret = 1; | |
1695 | ||
1696 | dout("try_write start %p state %lu nref %d\n", con, con->state, | |
1697 | atomic_read(&con->nref)); | |
1698 | ||
31b8006e SW |
1699 | more: |
1700 | dout("try_write out_kvec_bytes %d\n", con->out_kvec_bytes); | |
1701 | ||
1702 | /* open the socket first? */ | |
1703 | if (con->sock == NULL) { | |
1704 | /* | |
1705 | * if we were STANDBY and are reconnecting _this_ | |
1706 | * connection, bump connect_seq now. Always bump | |
1707 | * global_seq. | |
1708 | */ | |
1709 | if (test_and_clear_bit(STANDBY, &con->state)) | |
1710 | con->connect_seq++; | |
1711 | ||
eed0ef2c SW |
1712 | prepare_write_banner(msgr, con); |
1713 | prepare_write_connect(msgr, con, 1); | |
1714 | prepare_read_banner(con); | |
31b8006e | 1715 | set_bit(CONNECTING, &con->state); |
eed0ef2c | 1716 | clear_bit(NEGOTIATING, &con->state); |
31b8006e | 1717 | |
cf3e5c40 | 1718 | BUG_ON(con->in_msg); |
31b8006e SW |
1719 | con->in_tag = CEPH_MSGR_TAG_READY; |
1720 | dout("try_write initiating connect on %p new state %lu\n", | |
1721 | con, con->state); | |
1722 | con->sock = ceph_tcp_connect(con); | |
1723 | if (IS_ERR(con->sock)) { | |
1724 | con->sock = NULL; | |
1725 | con->error_msg = "connect error"; | |
1726 | ret = -1; | |
1727 | goto out; | |
1728 | } | |
1729 | } | |
1730 | ||
1731 | more_kvec: | |
1732 | /* kvec data queued? */ | |
1733 | if (con->out_skip) { | |
1734 | ret = write_partial_skip(con); | |
1735 | if (ret <= 0) | |
1736 | goto done; | |
1737 | if (ret < 0) { | |
1738 | dout("try_write write_partial_skip err %d\n", ret); | |
1739 | goto done; | |
1740 | } | |
1741 | } | |
1742 | if (con->out_kvec_left) { | |
1743 | ret = write_partial_kvec(con); | |
1744 | if (ret <= 0) | |
1745 | goto done; | |
31b8006e SW |
1746 | } |
1747 | ||
1748 | /* msg pages? */ | |
1749 | if (con->out_msg) { | |
c86a2930 SW |
1750 | if (con->out_msg_done) { |
1751 | ceph_msg_put(con->out_msg); | |
1752 | con->out_msg = NULL; /* we're done with this one */ | |
1753 | goto do_next; | |
1754 | } | |
1755 | ||
31b8006e SW |
1756 | ret = write_partial_msg_pages(con); |
1757 | if (ret == 1) | |
1758 | goto more_kvec; /* we need to send the footer, too! */ | |
1759 | if (ret == 0) | |
1760 | goto done; | |
1761 | if (ret < 0) { | |
1762 | dout("try_write write_partial_msg_pages err %d\n", | |
1763 | ret); | |
1764 | goto done; | |
1765 | } | |
1766 | } | |
1767 | ||
c86a2930 | 1768 | do_next: |
31b8006e SW |
1769 | if (!test_bit(CONNECTING, &con->state)) { |
1770 | /* is anything else pending? */ | |
1771 | if (!list_empty(&con->out_queue)) { | |
1772 | prepare_write_message(con); | |
1773 | goto more; | |
1774 | } | |
1775 | if (con->in_seq > con->in_seq_acked) { | |
1776 | prepare_write_ack(con); | |
1777 | goto more; | |
1778 | } | |
1779 | if (test_and_clear_bit(KEEPALIVE_PENDING, &con->state)) { | |
1780 | prepare_write_keepalive(con); | |
1781 | goto more; | |
1782 | } | |
1783 | } | |
1784 | ||
1785 | /* Nothing to do! */ | |
1786 | clear_bit(WRITE_PENDING, &con->state); | |
1787 | dout("try_write nothing else to write.\n"); | |
1788 | done: | |
1789 | ret = 0; | |
1790 | out: | |
31b8006e SW |
1791 | dout("try_write done on %p\n", con); |
1792 | return ret; | |
1793 | } | |
1794 | ||
1795 | ||
1796 | ||
1797 | /* | |
1798 | * Read what we can from the socket. | |
1799 | */ | |
1800 | static int try_read(struct ceph_connection *con) | |
1801 | { | |
31b8006e SW |
1802 | int ret = -1; |
1803 | ||
1804 | if (!con->sock) | |
1805 | return 0; | |
1806 | ||
1807 | if (test_bit(STANDBY, &con->state)) | |
1808 | return 0; | |
1809 | ||
1810 | dout("try_read start on %p\n", con); | |
ec302645 | 1811 | |
31b8006e SW |
1812 | more: |
1813 | dout("try_read tag %d in_base_pos %d\n", (int)con->in_tag, | |
1814 | con->in_base_pos); | |
1815 | if (test_bit(CONNECTING, &con->state)) { | |
eed0ef2c SW |
1816 | if (!test_bit(NEGOTIATING, &con->state)) { |
1817 | dout("try_read connecting\n"); | |
1818 | ret = read_partial_banner(con); | |
1819 | if (ret <= 0) | |
1820 | goto done; | |
1821 | if (process_banner(con) < 0) { | |
1822 | ret = -1; | |
1823 | goto out; | |
1824 | } | |
1825 | } | |
31b8006e SW |
1826 | ret = read_partial_connect(con); |
1827 | if (ret <= 0) | |
1828 | goto done; | |
1829 | if (process_connect(con) < 0) { | |
1830 | ret = -1; | |
1831 | goto out; | |
1832 | } | |
1833 | goto more; | |
1834 | } | |
1835 | ||
1836 | if (con->in_base_pos < 0) { | |
1837 | /* | |
1838 | * skipping + discarding content. | |
1839 | * | |
1840 | * FIXME: there must be a better way to do this! | |
1841 | */ | |
1842 | static char buf[1024]; | |
1843 | int skip = min(1024, -con->in_base_pos); | |
1844 | dout("skipping %d / %d bytes\n", skip, -con->in_base_pos); | |
1845 | ret = ceph_tcp_recvmsg(con->sock, buf, skip); | |
1846 | if (ret <= 0) | |
1847 | goto done; | |
1848 | con->in_base_pos += ret; | |
1849 | if (con->in_base_pos) | |
1850 | goto more; | |
1851 | } | |
1852 | if (con->in_tag == CEPH_MSGR_TAG_READY) { | |
1853 | /* | |
1854 | * what's next? | |
1855 | */ | |
1856 | ret = ceph_tcp_recvmsg(con->sock, &con->in_tag, 1); | |
1857 | if (ret <= 0) | |
1858 | goto done; | |
1859 | dout("try_read got tag %d\n", (int)con->in_tag); | |
1860 | switch (con->in_tag) { | |
1861 | case CEPH_MSGR_TAG_MSG: | |
1862 | prepare_read_message(con); | |
1863 | break; | |
1864 | case CEPH_MSGR_TAG_ACK: | |
1865 | prepare_read_ack(con); | |
1866 | break; | |
1867 | case CEPH_MSGR_TAG_CLOSE: | |
1868 | set_bit(CLOSED, &con->state); /* fixme */ | |
1869 | goto done; | |
1870 | default: | |
1871 | goto bad_tag; | |
1872 | } | |
1873 | } | |
1874 | if (con->in_tag == CEPH_MSGR_TAG_MSG) { | |
1875 | ret = read_partial_message(con); | |
1876 | if (ret <= 0) { | |
1877 | switch (ret) { | |
1878 | case -EBADMSG: | |
1879 | con->error_msg = "bad crc"; | |
1880 | ret = -EIO; | |
1881 | goto out; | |
1882 | case -EIO: | |
1883 | con->error_msg = "io error"; | |
1884 | goto out; | |
1885 | default: | |
1886 | goto done; | |
1887 | } | |
1888 | } | |
1889 | if (con->in_tag == CEPH_MSGR_TAG_READY) | |
1890 | goto more; | |
1891 | process_message(con); | |
1892 | goto more; | |
1893 | } | |
1894 | if (con->in_tag == CEPH_MSGR_TAG_ACK) { | |
1895 | ret = read_partial_ack(con); | |
1896 | if (ret <= 0) | |
1897 | goto done; | |
1898 | process_ack(con); | |
1899 | goto more; | |
1900 | } | |
1901 | ||
1902 | done: | |
1903 | ret = 0; | |
1904 | out: | |
1905 | dout("try_read done on %p\n", con); | |
1906 | return ret; | |
1907 | ||
1908 | bad_tag: | |
1909 | pr_err("try_read bad con->in_tag = %d\n", (int)con->in_tag); | |
1910 | con->error_msg = "protocol error, garbage tag"; | |
1911 | ret = -1; | |
1912 | goto out; | |
1913 | } | |
1914 | ||
1915 | ||
1916 | /* | |
1917 | * Atomically queue work on a connection. Bump @con reference to | |
1918 | * avoid races with connection teardown. | |
1919 | * | |
1920 | * There is some trickery going on with QUEUED and BUSY because we | |
1921 | * only want a _single_ thread operating on each connection at any | |
1922 | * point in time, but we want to use all available CPUs. | |
1923 | * | |
1924 | * The worker thread only proceeds if it can atomically set BUSY. It | |
1925 | * clears QUEUED and does it's thing. When it thinks it's done, it | |
1926 | * clears BUSY, then rechecks QUEUED.. if it's set again, it loops | |
1927 | * (tries again to set BUSY). | |
1928 | * | |
1929 | * To queue work, we first set QUEUED, _then_ if BUSY isn't set, we | |
1930 | * try to queue work. If that fails (work is already queued, or BUSY) | |
1931 | * we give up (work also already being done or is queued) but leave QUEUED | |
1932 | * set so that the worker thread will loop if necessary. | |
1933 | */ | |
1934 | static void queue_con(struct ceph_connection *con) | |
1935 | { | |
1936 | if (test_bit(DEAD, &con->state)) { | |
1937 | dout("queue_con %p ignoring: DEAD\n", | |
1938 | con); | |
1939 | return; | |
1940 | } | |
1941 | ||
1942 | if (!con->ops->get(con)) { | |
1943 | dout("queue_con %p ref count 0\n", con); | |
1944 | return; | |
1945 | } | |
1946 | ||
1947 | set_bit(QUEUED, &con->state); | |
1948 | if (test_bit(BUSY, &con->state)) { | |
1949 | dout("queue_con %p - already BUSY\n", con); | |
1950 | con->ops->put(con); | |
1951 | } else if (!queue_work(ceph_msgr_wq, &con->work.work)) { | |
1952 | dout("queue_con %p - already queued\n", con); | |
1953 | con->ops->put(con); | |
1954 | } else { | |
1955 | dout("queue_con %p\n", con); | |
1956 | } | |
1957 | } | |
1958 | ||
1959 | /* | |
1960 | * Do some work on a connection. Drop a connection ref when we're done. | |
1961 | */ | |
1962 | static void con_work(struct work_struct *work) | |
1963 | { | |
1964 | struct ceph_connection *con = container_of(work, struct ceph_connection, | |
1965 | work.work); | |
1966 | int backoff = 0; | |
1967 | ||
1968 | more: | |
1969 | if (test_and_set_bit(BUSY, &con->state) != 0) { | |
1970 | dout("con_work %p BUSY already set\n", con); | |
1971 | goto out; | |
1972 | } | |
1973 | dout("con_work %p start, clearing QUEUED\n", con); | |
1974 | clear_bit(QUEUED, &con->state); | |
1975 | ||
9dd4658d SW |
1976 | mutex_lock(&con->mutex); |
1977 | ||
31b8006e SW |
1978 | if (test_bit(CLOSED, &con->state)) { /* e.g. if we are replaced */ |
1979 | dout("con_work CLOSED\n"); | |
1980 | con_close_socket(con); | |
1981 | goto done; | |
1982 | } | |
1983 | if (test_and_clear_bit(OPENING, &con->state)) { | |
1984 | /* reopen w/ new peer */ | |
1985 | dout("con_work OPENING\n"); | |
1986 | con_close_socket(con); | |
1987 | } | |
1988 | ||
1989 | if (test_and_clear_bit(SOCK_CLOSED, &con->state) || | |
1990 | try_read(con) < 0 || | |
1991 | try_write(con) < 0) { | |
9dd4658d | 1992 | mutex_unlock(&con->mutex); |
31b8006e SW |
1993 | backoff = 1; |
1994 | ceph_fault(con); /* error/fault path */ | |
9dd4658d | 1995 | goto done_unlocked; |
31b8006e SW |
1996 | } |
1997 | ||
1998 | done: | |
9dd4658d SW |
1999 | mutex_unlock(&con->mutex); |
2000 | ||
2001 | done_unlocked: | |
31b8006e SW |
2002 | clear_bit(BUSY, &con->state); |
2003 | dout("con->state=%lu\n", con->state); | |
2004 | if (test_bit(QUEUED, &con->state)) { | |
e2663ab6 | 2005 | if (!backoff || test_bit(OPENING, &con->state)) { |
31b8006e SW |
2006 | dout("con_work %p QUEUED reset, looping\n", con); |
2007 | goto more; | |
2008 | } | |
2009 | dout("con_work %p QUEUED reset, but just faulted\n", con); | |
2010 | clear_bit(QUEUED, &con->state); | |
2011 | } | |
2012 | dout("con_work %p done\n", con); | |
2013 | ||
2014 | out: | |
2015 | con->ops->put(con); | |
2016 | } | |
2017 | ||
2018 | ||
2019 | /* | |
2020 | * Generic error/fault handler. A retry mechanism is used with | |
2021 | * exponential backoff | |
2022 | */ | |
2023 | static void ceph_fault(struct ceph_connection *con) | |
2024 | { | |
2025 | pr_err("%s%lld %s %s\n", ENTITY_NAME(con->peer_name), | |
2026 | pr_addr(&con->peer_addr.in_addr), con->error_msg); | |
2027 | dout("fault %p state %lu to peer %s\n", | |
2028 | con, con->state, pr_addr(&con->peer_addr.in_addr)); | |
2029 | ||
2030 | if (test_bit(LOSSYTX, &con->state)) { | |
2031 | dout("fault on LOSSYTX channel\n"); | |
2032 | goto out; | |
2033 | } | |
2034 | ||
ec302645 | 2035 | mutex_lock(&con->mutex); |
91e45ce3 SW |
2036 | if (test_bit(CLOSED, &con->state)) |
2037 | goto out_unlock; | |
ec302645 | 2038 | |
31b8006e | 2039 | con_close_socket(con); |
5e095e8b SW |
2040 | |
2041 | if (con->in_msg) { | |
2042 | ceph_msg_put(con->in_msg); | |
2043 | con->in_msg = NULL; | |
2044 | } | |
31b8006e | 2045 | |
e80a52d1 SW |
2046 | /* Requeue anything that hasn't been acked */ |
2047 | list_splice_init(&con->out_sent, &con->out_queue); | |
9bd2e6f8 | 2048 | |
31b8006e SW |
2049 | /* If there are no messages in the queue, place the connection |
2050 | * in a STANDBY state (i.e., don't try to reconnect just yet). */ | |
31b8006e SW |
2051 | if (list_empty(&con->out_queue) && !con->out_keepalive_pending) { |
2052 | dout("fault setting STANDBY\n"); | |
2053 | set_bit(STANDBY, &con->state); | |
e80a52d1 SW |
2054 | } else { |
2055 | /* retry after a delay. */ | |
2056 | if (con->delay == 0) | |
2057 | con->delay = BASE_DELAY_INTERVAL; | |
2058 | else if (con->delay < MAX_DELAY_INTERVAL) | |
2059 | con->delay *= 2; | |
2060 | dout("fault queueing %p delay %lu\n", con, con->delay); | |
2061 | con->ops->get(con); | |
2062 | if (queue_delayed_work(ceph_msgr_wq, &con->work, | |
2063 | round_jiffies_relative(con->delay)) == 0) | |
2064 | con->ops->put(con); | |
31b8006e SW |
2065 | } |
2066 | ||
91e45ce3 SW |
2067 | out_unlock: |
2068 | mutex_unlock(&con->mutex); | |
31b8006e | 2069 | out: |
161fd65a SW |
2070 | /* |
2071 | * in case we faulted due to authentication, invalidate our | |
2072 | * current tickets so that we can get new ones. | |
213c99ee | 2073 | */ |
161fd65a SW |
2074 | if (con->auth_retry && con->ops->invalidate_authorizer) { |
2075 | dout("calling invalidate_authorizer()\n"); | |
2076 | con->ops->invalidate_authorizer(con); | |
2077 | } | |
2078 | ||
31b8006e SW |
2079 | if (con->ops->fault) |
2080 | con->ops->fault(con); | |
2081 | } | |
2082 | ||
2083 | ||
2084 | ||
2085 | /* | |
2086 | * create a new messenger instance | |
2087 | */ | |
2088 | struct ceph_messenger *ceph_messenger_create(struct ceph_entity_addr *myaddr) | |
2089 | { | |
2090 | struct ceph_messenger *msgr; | |
2091 | ||
2092 | msgr = kzalloc(sizeof(*msgr), GFP_KERNEL); | |
2093 | if (msgr == NULL) | |
2094 | return ERR_PTR(-ENOMEM); | |
2095 | ||
2096 | spin_lock_init(&msgr->global_seq_lock); | |
2097 | ||
2098 | /* the zero page is needed if a request is "canceled" while the message | |
2099 | * is being written over the socket */ | |
31459fe4 | 2100 | msgr->zero_page = __page_cache_alloc(GFP_KERNEL | __GFP_ZERO); |
31b8006e SW |
2101 | if (!msgr->zero_page) { |
2102 | kfree(msgr); | |
2103 | return ERR_PTR(-ENOMEM); | |
2104 | } | |
2105 | kmap(msgr->zero_page); | |
2106 | ||
2107 | if (myaddr) | |
2108 | msgr->inst.addr = *myaddr; | |
2109 | ||
2110 | /* select a random nonce */ | |
ac8839d7 | 2111 | msgr->inst.addr.type = 0; |
103e2d3a | 2112 | get_random_bytes(&msgr->inst.addr.nonce, sizeof(msgr->inst.addr.nonce)); |
63f2d211 | 2113 | encode_my_addr(msgr); |
31b8006e SW |
2114 | |
2115 | dout("messenger_create %p\n", msgr); | |
2116 | return msgr; | |
2117 | } | |
2118 | ||
2119 | void ceph_messenger_destroy(struct ceph_messenger *msgr) | |
2120 | { | |
2121 | dout("destroy %p\n", msgr); | |
2122 | kunmap(msgr->zero_page); | |
2123 | __free_page(msgr->zero_page); | |
2124 | kfree(msgr); | |
2125 | dout("destroyed messenger %p\n", msgr); | |
2126 | } | |
2127 | ||
2128 | /* | |
2129 | * Queue up an outgoing message on the given connection. | |
2130 | */ | |
2131 | void ceph_con_send(struct ceph_connection *con, struct ceph_msg *msg) | |
2132 | { | |
2133 | if (test_bit(CLOSED, &con->state)) { | |
2134 | dout("con_send %p closed, dropping %p\n", con, msg); | |
2135 | ceph_msg_put(msg); | |
2136 | return; | |
2137 | } | |
2138 | ||
2139 | /* set src+dst */ | |
dbad185d | 2140 | msg->hdr.src = con->msgr->inst.name; |
31b8006e | 2141 | |
3ca02ef9 SW |
2142 | BUG_ON(msg->front.iov_len != le32_to_cpu(msg->hdr.front_len)); |
2143 | ||
e84346b7 SW |
2144 | msg->needs_out_seq = true; |
2145 | ||
31b8006e | 2146 | /* queue */ |
ec302645 | 2147 | mutex_lock(&con->mutex); |
31b8006e SW |
2148 | BUG_ON(!list_empty(&msg->list_head)); |
2149 | list_add_tail(&msg->list_head, &con->out_queue); | |
2150 | dout("----- %p to %s%lld %d=%s len %d+%d+%d -----\n", msg, | |
2151 | ENTITY_NAME(con->peer_name), le16_to_cpu(msg->hdr.type), | |
2152 | ceph_msg_type_name(le16_to_cpu(msg->hdr.type)), | |
2153 | le32_to_cpu(msg->hdr.front_len), | |
2154 | le32_to_cpu(msg->hdr.middle_len), | |
2155 | le32_to_cpu(msg->hdr.data_len)); | |
ec302645 | 2156 | mutex_unlock(&con->mutex); |
31b8006e SW |
2157 | |
2158 | /* if there wasn't anything waiting to send before, queue | |
2159 | * new work */ | |
2160 | if (test_and_set_bit(WRITE_PENDING, &con->state) == 0) | |
2161 | queue_con(con); | |
2162 | } | |
2163 | ||
2164 | /* | |
2165 | * Revoke a message that was previously queued for send | |
2166 | */ | |
2167 | void ceph_con_revoke(struct ceph_connection *con, struct ceph_msg *msg) | |
2168 | { | |
ec302645 | 2169 | mutex_lock(&con->mutex); |
31b8006e | 2170 | if (!list_empty(&msg->list_head)) { |
ed98adad | 2171 | dout("con_revoke %p msg %p - was on queue\n", con, msg); |
31b8006e SW |
2172 | list_del_init(&msg->list_head); |
2173 | ceph_msg_put(msg); | |
2174 | msg->hdr.seq = 0; | |
ed98adad SW |
2175 | } |
2176 | if (con->out_msg == msg) { | |
2177 | dout("con_revoke %p msg %p - was sending\n", con, msg); | |
2178 | con->out_msg = NULL; | |
31b8006e SW |
2179 | if (con->out_kvec_is_msg) { |
2180 | con->out_skip = con->out_kvec_bytes; | |
2181 | con->out_kvec_is_msg = false; | |
2182 | } | |
ed98adad SW |
2183 | ceph_msg_put(msg); |
2184 | msg->hdr.seq = 0; | |
31b8006e | 2185 | } |
ec302645 | 2186 | mutex_unlock(&con->mutex); |
31b8006e SW |
2187 | } |
2188 | ||
350b1c32 | 2189 | /* |
0d59ab81 | 2190 | * Revoke a message that we may be reading data into |
350b1c32 | 2191 | */ |
0d59ab81 | 2192 | void ceph_con_revoke_message(struct ceph_connection *con, struct ceph_msg *msg) |
350b1c32 SW |
2193 | { |
2194 | mutex_lock(&con->mutex); | |
0d59ab81 YS |
2195 | if (con->in_msg && con->in_msg == msg) { |
2196 | unsigned front_len = le32_to_cpu(con->in_hdr.front_len); | |
2197 | unsigned middle_len = le32_to_cpu(con->in_hdr.middle_len); | |
350b1c32 SW |
2198 | unsigned data_len = le32_to_cpu(con->in_hdr.data_len); |
2199 | ||
2200 | /* skip rest of message */ | |
0d59ab81 | 2201 | dout("con_revoke_pages %p msg %p revoked\n", con, msg); |
350b1c32 SW |
2202 | con->in_base_pos = con->in_base_pos - |
2203 | sizeof(struct ceph_msg_header) - | |
0d59ab81 YS |
2204 | front_len - |
2205 | middle_len - | |
2206 | data_len - | |
350b1c32 | 2207 | sizeof(struct ceph_msg_footer); |
350b1c32 SW |
2208 | ceph_msg_put(con->in_msg); |
2209 | con->in_msg = NULL; | |
2210 | con->in_tag = CEPH_MSGR_TAG_READY; | |
684be25c | 2211 | con->in_seq++; |
350b1c32 SW |
2212 | } else { |
2213 | dout("con_revoke_pages %p msg %p pages %p no-op\n", | |
0d59ab81 | 2214 | con, con->in_msg, msg); |
350b1c32 SW |
2215 | } |
2216 | mutex_unlock(&con->mutex); | |
2217 | } | |
2218 | ||
31b8006e SW |
2219 | /* |
2220 | * Queue a keepalive byte to ensure the tcp connection is alive. | |
2221 | */ | |
2222 | void ceph_con_keepalive(struct ceph_connection *con) | |
2223 | { | |
2224 | if (test_and_set_bit(KEEPALIVE_PENDING, &con->state) == 0 && | |
2225 | test_and_set_bit(WRITE_PENDING, &con->state) == 0) | |
2226 | queue_con(con); | |
2227 | } | |
2228 | ||
2229 | ||
2230 | /* | |
2231 | * construct a new message with given type, size | |
2232 | * the new msg has a ref count of 1. | |
2233 | */ | |
34d23762 | 2234 | struct ceph_msg *ceph_msg_new(int type, int front_len, gfp_t flags) |
31b8006e SW |
2235 | { |
2236 | struct ceph_msg *m; | |
2237 | ||
34d23762 | 2238 | m = kmalloc(sizeof(*m), flags); |
31b8006e SW |
2239 | if (m == NULL) |
2240 | goto out; | |
c2e552e7 | 2241 | kref_init(&m->kref); |
31b8006e SW |
2242 | INIT_LIST_HEAD(&m->list_head); |
2243 | ||
45c6ceb5 | 2244 | m->hdr.tid = 0; |
31b8006e | 2245 | m->hdr.type = cpu_to_le16(type); |
45c6ceb5 SW |
2246 | m->hdr.priority = cpu_to_le16(CEPH_MSG_PRIO_DEFAULT); |
2247 | m->hdr.version = 0; | |
31b8006e SW |
2248 | m->hdr.front_len = cpu_to_le32(front_len); |
2249 | m->hdr.middle_len = 0; | |
bb257664 SW |
2250 | m->hdr.data_len = 0; |
2251 | m->hdr.data_off = 0; | |
45c6ceb5 | 2252 | m->hdr.reserved = 0; |
31b8006e SW |
2253 | m->footer.front_crc = 0; |
2254 | m->footer.middle_crc = 0; | |
2255 | m->footer.data_crc = 0; | |
45c6ceb5 | 2256 | m->footer.flags = 0; |
31b8006e SW |
2257 | m->front_max = front_len; |
2258 | m->front_is_vmalloc = false; | |
2259 | m->more_to_follow = false; | |
2260 | m->pool = NULL; | |
2261 | ||
2262 | /* front */ | |
2263 | if (front_len) { | |
2264 | if (front_len > PAGE_CACHE_SIZE) { | |
34d23762 | 2265 | m->front.iov_base = __vmalloc(front_len, flags, |
31b8006e SW |
2266 | PAGE_KERNEL); |
2267 | m->front_is_vmalloc = true; | |
2268 | } else { | |
34d23762 | 2269 | m->front.iov_base = kmalloc(front_len, flags); |
31b8006e SW |
2270 | } |
2271 | if (m->front.iov_base == NULL) { | |
2272 | pr_err("msg_new can't allocate %d bytes\n", | |
2273 | front_len); | |
2274 | goto out2; | |
2275 | } | |
2276 | } else { | |
2277 | m->front.iov_base = NULL; | |
2278 | } | |
2279 | m->front.iov_len = front_len; | |
2280 | ||
2281 | /* middle */ | |
2282 | m->middle = NULL; | |
2283 | ||
2284 | /* data */ | |
bb257664 SW |
2285 | m->nr_pages = 0; |
2286 | m->pages = NULL; | |
58bb3b37 | 2287 | m->pagelist = NULL; |
68b4476b YS |
2288 | m->bio = NULL; |
2289 | m->bio_iter = NULL; | |
2290 | m->bio_seg = 0; | |
2291 | m->trail = NULL; | |
31b8006e | 2292 | |
bb257664 | 2293 | dout("ceph_msg_new %p front %d\n", m, front_len); |
31b8006e SW |
2294 | return m; |
2295 | ||
2296 | out2: | |
2297 | ceph_msg_put(m); | |
2298 | out: | |
bb257664 | 2299 | pr_err("msg_new can't create type %d front %d\n", type, front_len); |
a79832f2 | 2300 | return NULL; |
31b8006e SW |
2301 | } |
2302 | ||
31b8006e SW |
2303 | /* |
2304 | * Allocate "middle" portion of a message, if it is needed and wasn't | |
2305 | * allocated by alloc_msg. This allows us to read a small fixed-size | |
2306 | * per-type header in the front and then gracefully fail (i.e., | |
2307 | * propagate the error to the caller based on info in the front) when | |
2308 | * the middle is too large. | |
2309 | */ | |
2450418c | 2310 | static int ceph_alloc_middle(struct ceph_connection *con, struct ceph_msg *msg) |
31b8006e SW |
2311 | { |
2312 | int type = le16_to_cpu(msg->hdr.type); | |
2313 | int middle_len = le32_to_cpu(msg->hdr.middle_len); | |
2314 | ||
2315 | dout("alloc_middle %p type %d %s middle_len %d\n", msg, type, | |
2316 | ceph_msg_type_name(type), middle_len); | |
2317 | BUG_ON(!middle_len); | |
2318 | BUG_ON(msg->middle); | |
2319 | ||
b6c1d5b8 | 2320 | msg->middle = ceph_buffer_new(middle_len, GFP_NOFS); |
31b8006e SW |
2321 | if (!msg->middle) |
2322 | return -ENOMEM; | |
2323 | return 0; | |
2324 | } | |
2325 | ||
2450418c YS |
2326 | /* |
2327 | * Generic message allocator, for incoming messages. | |
2328 | */ | |
2329 | static struct ceph_msg *ceph_alloc_msg(struct ceph_connection *con, | |
2330 | struct ceph_msg_header *hdr, | |
2331 | int *skip) | |
2332 | { | |
2333 | int type = le16_to_cpu(hdr->type); | |
2334 | int front_len = le32_to_cpu(hdr->front_len); | |
2335 | int middle_len = le32_to_cpu(hdr->middle_len); | |
2336 | struct ceph_msg *msg = NULL; | |
2337 | int ret; | |
2338 | ||
2339 | if (con->ops->alloc_msg) { | |
0547a9b3 | 2340 | mutex_unlock(&con->mutex); |
2450418c | 2341 | msg = con->ops->alloc_msg(con, hdr, skip); |
0547a9b3 | 2342 | mutex_lock(&con->mutex); |
a79832f2 | 2343 | if (!msg || *skip) |
2450418c YS |
2344 | return NULL; |
2345 | } | |
2346 | if (!msg) { | |
2347 | *skip = 0; | |
34d23762 | 2348 | msg = ceph_msg_new(type, front_len, GFP_NOFS); |
2450418c YS |
2349 | if (!msg) { |
2350 | pr_err("unable to allocate msg type %d len %d\n", | |
2351 | type, front_len); | |
a79832f2 | 2352 | return NULL; |
2450418c YS |
2353 | } |
2354 | } | |
9d7f0f13 | 2355 | memcpy(&msg->hdr, &con->in_hdr, sizeof(con->in_hdr)); |
2450418c | 2356 | |
bb257664 | 2357 | if (middle_len && !msg->middle) { |
2450418c | 2358 | ret = ceph_alloc_middle(con, msg); |
2450418c YS |
2359 | if (ret < 0) { |
2360 | ceph_msg_put(msg); | |
a79832f2 | 2361 | return NULL; |
2450418c YS |
2362 | } |
2363 | } | |
9d7f0f13 | 2364 | |
2450418c YS |
2365 | return msg; |
2366 | } | |
2367 | ||
31b8006e SW |
2368 | |
2369 | /* | |
2370 | * Free a generically kmalloc'd message. | |
2371 | */ | |
2372 | void ceph_msg_kfree(struct ceph_msg *m) | |
2373 | { | |
2374 | dout("msg_kfree %p\n", m); | |
2375 | if (m->front_is_vmalloc) | |
2376 | vfree(m->front.iov_base); | |
2377 | else | |
2378 | kfree(m->front.iov_base); | |
2379 | kfree(m); | |
2380 | } | |
2381 | ||
2382 | /* | |
2383 | * Drop a msg ref. Destroy as needed. | |
2384 | */ | |
c2e552e7 SW |
2385 | void ceph_msg_last_put(struct kref *kref) |
2386 | { | |
2387 | struct ceph_msg *m = container_of(kref, struct ceph_msg, kref); | |
31b8006e | 2388 | |
c2e552e7 SW |
2389 | dout("ceph_msg_put last one on %p\n", m); |
2390 | WARN_ON(!list_empty(&m->list_head)); | |
2391 | ||
2392 | /* drop middle, data, if any */ | |
2393 | if (m->middle) { | |
2394 | ceph_buffer_put(m->middle); | |
2395 | m->middle = NULL; | |
31b8006e | 2396 | } |
c2e552e7 SW |
2397 | m->nr_pages = 0; |
2398 | m->pages = NULL; | |
2399 | ||
58bb3b37 SW |
2400 | if (m->pagelist) { |
2401 | ceph_pagelist_release(m->pagelist); | |
2402 | kfree(m->pagelist); | |
2403 | m->pagelist = NULL; | |
2404 | } | |
2405 | ||
68b4476b YS |
2406 | m->trail = NULL; |
2407 | ||
c2e552e7 SW |
2408 | if (m->pool) |
2409 | ceph_msgpool_put(m->pool, m); | |
2410 | else | |
2411 | ceph_msg_kfree(m); | |
31b8006e | 2412 | } |
9ec7cab1 SW |
2413 | |
2414 | void ceph_msg_dump(struct ceph_msg *msg) | |
2415 | { | |
2416 | pr_debug("msg_dump %p (front_max %d nr_pages %d)\n", msg, | |
2417 | msg->front_max, msg->nr_pages); | |
2418 | print_hex_dump(KERN_DEBUG, "header: ", | |
2419 | DUMP_PREFIX_OFFSET, 16, 1, | |
2420 | &msg->hdr, sizeof(msg->hdr), true); | |
2421 | print_hex_dump(KERN_DEBUG, " front: ", | |
2422 | DUMP_PREFIX_OFFSET, 16, 1, | |
2423 | msg->front.iov_base, msg->front.iov_len, true); | |
2424 | if (msg->middle) | |
2425 | print_hex_dump(KERN_DEBUG, "middle: ", | |
2426 | DUMP_PREFIX_OFFSET, 16, 1, | |
2427 | msg->middle->vec.iov_base, | |
2428 | msg->middle->vec.iov_len, true); | |
2429 | print_hex_dump(KERN_DEBUG, "footer: ", | |
2430 | DUMP_PREFIX_OFFSET, 16, 1, | |
2431 | &msg->footer, sizeof(msg->footer), true); | |
2432 | } |