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Commit | Line | Data |
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3d14c5d2 | 1 | #include <linux/ceph/ceph_debug.h> |
31b8006e SW |
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 | ||
3d14c5d2 YS |
16 | #include <linux/ceph/libceph.h> |
17 | #include <linux/ceph/messenger.h> | |
18 | #include <linux/ceph/decode.h> | |
19 | #include <linux/ceph/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 | ||
3d14c5d2 | 53 | const char *ceph_pr_addr(const struct sockaddr_storage *ss) |
31b8006e SW |
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 | } | |
3d14c5d2 | 84 | EXPORT_SYMBOL(ceph_pr_addr); |
31b8006e | 85 | |
63f2d211 SW |
86 | static void encode_my_addr(struct ceph_messenger *msgr) |
87 | { | |
88 | memcpy(&msgr->my_enc_addr, &msgr->inst.addr, sizeof(msgr->my_enc_addr)); | |
89 | ceph_encode_addr(&msgr->my_enc_addr); | |
90 | } | |
91 | ||
31b8006e SW |
92 | /* |
93 | * work queue for all reading and writing to/from the socket. | |
94 | */ | |
95 | struct workqueue_struct *ceph_msgr_wq; | |
96 | ||
3d14c5d2 | 97 | int ceph_msgr_init(void) |
31b8006e | 98 | { |
f363e45f | 99 | ceph_msgr_wq = alloc_workqueue("ceph-msgr", WQ_NON_REENTRANT, 0); |
d96c9043 SW |
100 | if (!ceph_msgr_wq) { |
101 | pr_err("msgr_init failed to create workqueue\n"); | |
102 | return -ENOMEM; | |
31b8006e SW |
103 | } |
104 | return 0; | |
105 | } | |
3d14c5d2 | 106 | EXPORT_SYMBOL(ceph_msgr_init); |
31b8006e SW |
107 | |
108 | void ceph_msgr_exit(void) | |
109 | { | |
110 | destroy_workqueue(ceph_msgr_wq); | |
111 | } | |
3d14c5d2 | 112 | EXPORT_SYMBOL(ceph_msgr_exit); |
31b8006e | 113 | |
cd84db6e | 114 | void ceph_msgr_flush(void) |
a922d38f SW |
115 | { |
116 | flush_workqueue(ceph_msgr_wq); | |
117 | } | |
3d14c5d2 | 118 | EXPORT_SYMBOL(ceph_msgr_flush); |
a922d38f SW |
119 | |
120 | ||
31b8006e SW |
121 | /* |
122 | * socket callback functions | |
123 | */ | |
124 | ||
125 | /* data available on socket, or listen socket received a connect */ | |
126 | static void ceph_data_ready(struct sock *sk, int count_unused) | |
127 | { | |
128 | struct ceph_connection *con = | |
129 | (struct ceph_connection *)sk->sk_user_data; | |
130 | if (sk->sk_state != TCP_CLOSE_WAIT) { | |
131 | dout("ceph_data_ready on %p state = %lu, queueing work\n", | |
132 | con, con->state); | |
133 | queue_con(con); | |
134 | } | |
135 | } | |
136 | ||
137 | /* socket has buffer space for writing */ | |
138 | static void ceph_write_space(struct sock *sk) | |
139 | { | |
140 | struct ceph_connection *con = | |
141 | (struct ceph_connection *)sk->sk_user_data; | |
142 | ||
143 | /* only queue to workqueue if there is data we want to write. */ | |
144 | if (test_bit(WRITE_PENDING, &con->state)) { | |
145 | dout("ceph_write_space %p queueing write work\n", con); | |
146 | queue_con(con); | |
147 | } else { | |
148 | dout("ceph_write_space %p nothing to write\n", con); | |
149 | } | |
150 | ||
151 | /* since we have our own write_space, clear the SOCK_NOSPACE flag */ | |
152 | clear_bit(SOCK_NOSPACE, &sk->sk_socket->flags); | |
153 | } | |
154 | ||
155 | /* socket's state has changed */ | |
156 | static void ceph_state_change(struct sock *sk) | |
157 | { | |
158 | struct ceph_connection *con = | |
159 | (struct ceph_connection *)sk->sk_user_data; | |
160 | ||
161 | dout("ceph_state_change %p state = %lu sk_state = %u\n", | |
162 | con, con->state, sk->sk_state); | |
163 | ||
164 | if (test_bit(CLOSED, &con->state)) | |
165 | return; | |
166 | ||
167 | switch (sk->sk_state) { | |
168 | case TCP_CLOSE: | |
169 | dout("ceph_state_change TCP_CLOSE\n"); | |
170 | case TCP_CLOSE_WAIT: | |
171 | dout("ceph_state_change TCP_CLOSE_WAIT\n"); | |
172 | if (test_and_set_bit(SOCK_CLOSED, &con->state) == 0) { | |
173 | if (test_bit(CONNECTING, &con->state)) | |
174 | con->error_msg = "connection failed"; | |
175 | else | |
176 | con->error_msg = "socket closed"; | |
177 | queue_con(con); | |
178 | } | |
179 | break; | |
180 | case TCP_ESTABLISHED: | |
181 | dout("ceph_state_change TCP_ESTABLISHED\n"); | |
182 | queue_con(con); | |
183 | break; | |
184 | } | |
185 | } | |
186 | ||
187 | /* | |
188 | * set up socket callbacks | |
189 | */ | |
190 | static void set_sock_callbacks(struct socket *sock, | |
191 | struct ceph_connection *con) | |
192 | { | |
193 | struct sock *sk = sock->sk; | |
194 | sk->sk_user_data = (void *)con; | |
195 | sk->sk_data_ready = ceph_data_ready; | |
196 | sk->sk_write_space = ceph_write_space; | |
197 | sk->sk_state_change = ceph_state_change; | |
198 | } | |
199 | ||
200 | ||
201 | /* | |
202 | * socket helpers | |
203 | */ | |
204 | ||
205 | /* | |
206 | * initiate connection to a remote socket. | |
207 | */ | |
208 | static struct socket *ceph_tcp_connect(struct ceph_connection *con) | |
209 | { | |
f91d3471 | 210 | struct sockaddr_storage *paddr = &con->peer_addr.in_addr; |
31b8006e SW |
211 | struct socket *sock; |
212 | int ret; | |
213 | ||
214 | BUG_ON(con->sock); | |
f91d3471 SW |
215 | ret = sock_create_kern(con->peer_addr.in_addr.ss_family, SOCK_STREAM, |
216 | IPPROTO_TCP, &sock); | |
31b8006e SW |
217 | if (ret) |
218 | return ERR_PTR(ret); | |
219 | con->sock = sock; | |
220 | sock->sk->sk_allocation = GFP_NOFS; | |
221 | ||
a6a5349d SW |
222 | #ifdef CONFIG_LOCKDEP |
223 | lockdep_set_class(&sock->sk->sk_lock, &socket_class); | |
224 | #endif | |
225 | ||
31b8006e SW |
226 | set_sock_callbacks(sock, con); |
227 | ||
3d14c5d2 | 228 | dout("connect %s\n", ceph_pr_addr(&con->peer_addr.in_addr)); |
31b8006e | 229 | |
f91d3471 SW |
230 | ret = sock->ops->connect(sock, (struct sockaddr *)paddr, sizeof(*paddr), |
231 | O_NONBLOCK); | |
31b8006e SW |
232 | if (ret == -EINPROGRESS) { |
233 | dout("connect %s EINPROGRESS sk_state = %u\n", | |
3d14c5d2 | 234 | ceph_pr_addr(&con->peer_addr.in_addr), |
31b8006e SW |
235 | sock->sk->sk_state); |
236 | ret = 0; | |
237 | } | |
238 | if (ret < 0) { | |
239 | pr_err("connect %s error %d\n", | |
3d14c5d2 | 240 | ceph_pr_addr(&con->peer_addr.in_addr), ret); |
31b8006e SW |
241 | sock_release(sock); |
242 | con->sock = NULL; | |
243 | con->error_msg = "connect error"; | |
244 | } | |
245 | ||
246 | if (ret < 0) | |
247 | return ERR_PTR(ret); | |
248 | return sock; | |
249 | } | |
250 | ||
251 | static int ceph_tcp_recvmsg(struct socket *sock, void *buf, size_t len) | |
252 | { | |
253 | struct kvec iov = {buf, len}; | |
254 | struct msghdr msg = { .msg_flags = MSG_DONTWAIT | MSG_NOSIGNAL }; | |
98bdb0aa | 255 | int r; |
31b8006e | 256 | |
98bdb0aa SW |
257 | r = kernel_recvmsg(sock, &msg, &iov, 1, len, msg.msg_flags); |
258 | if (r == -EAGAIN) | |
259 | r = 0; | |
260 | return r; | |
31b8006e SW |
261 | } |
262 | ||
263 | /* | |
264 | * write something. @more is true if caller will be sending more data | |
265 | * shortly. | |
266 | */ | |
267 | static int ceph_tcp_sendmsg(struct socket *sock, struct kvec *iov, | |
268 | size_t kvlen, size_t len, int more) | |
269 | { | |
270 | struct msghdr msg = { .msg_flags = MSG_DONTWAIT | MSG_NOSIGNAL }; | |
42961d23 | 271 | int r; |
31b8006e SW |
272 | |
273 | if (more) | |
274 | msg.msg_flags |= MSG_MORE; | |
275 | else | |
276 | msg.msg_flags |= MSG_EOR; /* superfluous, but what the hell */ | |
277 | ||
42961d23 SW |
278 | r = kernel_sendmsg(sock, &msg, iov, kvlen, len); |
279 | if (r == -EAGAIN) | |
280 | r = 0; | |
281 | return r; | |
31b8006e SW |
282 | } |
283 | ||
284 | ||
285 | /* | |
286 | * Shutdown/close the socket for the given connection. | |
287 | */ | |
288 | static int con_close_socket(struct ceph_connection *con) | |
289 | { | |
290 | int rc; | |
291 | ||
292 | dout("con_close_socket on %p sock %p\n", con, con->sock); | |
293 | if (!con->sock) | |
294 | return 0; | |
295 | set_bit(SOCK_CLOSED, &con->state); | |
296 | rc = con->sock->ops->shutdown(con->sock, SHUT_RDWR); | |
297 | sock_release(con->sock); | |
298 | con->sock = NULL; | |
299 | clear_bit(SOCK_CLOSED, &con->state); | |
300 | return rc; | |
301 | } | |
302 | ||
303 | /* | |
304 | * Reset a connection. Discard all incoming and outgoing messages | |
305 | * and clear *_seq state. | |
306 | */ | |
307 | static void ceph_msg_remove(struct ceph_msg *msg) | |
308 | { | |
309 | list_del_init(&msg->list_head); | |
310 | ceph_msg_put(msg); | |
311 | } | |
312 | static void ceph_msg_remove_list(struct list_head *head) | |
313 | { | |
314 | while (!list_empty(head)) { | |
315 | struct ceph_msg *msg = list_first_entry(head, struct ceph_msg, | |
316 | list_head); | |
317 | ceph_msg_remove(msg); | |
318 | } | |
319 | } | |
320 | ||
321 | static void reset_connection(struct ceph_connection *con) | |
322 | { | |
323 | /* reset connection, out_queue, msg_ and connect_seq */ | |
324 | /* discard existing out_queue and msg_seq */ | |
31b8006e SW |
325 | ceph_msg_remove_list(&con->out_queue); |
326 | ceph_msg_remove_list(&con->out_sent); | |
327 | ||
cf3e5c40 SW |
328 | if (con->in_msg) { |
329 | ceph_msg_put(con->in_msg); | |
330 | con->in_msg = NULL; | |
331 | } | |
332 | ||
31b8006e SW |
333 | con->connect_seq = 0; |
334 | con->out_seq = 0; | |
c86a2930 SW |
335 | if (con->out_msg) { |
336 | ceph_msg_put(con->out_msg); | |
337 | con->out_msg = NULL; | |
338 | } | |
31b8006e | 339 | con->in_seq = 0; |
0e0d5e0c | 340 | con->in_seq_acked = 0; |
31b8006e SW |
341 | } |
342 | ||
343 | /* | |
344 | * mark a peer down. drop any open connections. | |
345 | */ | |
346 | void ceph_con_close(struct ceph_connection *con) | |
347 | { | |
3d14c5d2 YS |
348 | dout("con_close %p peer %s\n", con, |
349 | ceph_pr_addr(&con->peer_addr.in_addr)); | |
31b8006e SW |
350 | set_bit(CLOSED, &con->state); /* in case there's queued work */ |
351 | clear_bit(STANDBY, &con->state); /* avoid connect_seq bump */ | |
1679f876 SW |
352 | clear_bit(LOSSYTX, &con->state); /* so we retry next connect */ |
353 | clear_bit(KEEPALIVE_PENDING, &con->state); | |
354 | clear_bit(WRITE_PENDING, &con->state); | |
ec302645 | 355 | mutex_lock(&con->mutex); |
31b8006e | 356 | reset_connection(con); |
6f2bc3ff | 357 | con->peer_global_seq = 0; |
91e45ce3 | 358 | cancel_delayed_work(&con->work); |
ec302645 | 359 | mutex_unlock(&con->mutex); |
31b8006e SW |
360 | queue_con(con); |
361 | } | |
3d14c5d2 | 362 | EXPORT_SYMBOL(ceph_con_close); |
31b8006e | 363 | |
31b8006e SW |
364 | /* |
365 | * Reopen a closed connection, with a new peer address. | |
366 | */ | |
367 | void ceph_con_open(struct ceph_connection *con, struct ceph_entity_addr *addr) | |
368 | { | |
3d14c5d2 | 369 | dout("con_open %p %s\n", con, ceph_pr_addr(&addr->in_addr)); |
31b8006e SW |
370 | set_bit(OPENING, &con->state); |
371 | clear_bit(CLOSED, &con->state); | |
372 | memcpy(&con->peer_addr, addr, sizeof(*addr)); | |
03c677e1 | 373 | con->delay = 0; /* reset backoff memory */ |
31b8006e SW |
374 | queue_con(con); |
375 | } | |
3d14c5d2 | 376 | EXPORT_SYMBOL(ceph_con_open); |
31b8006e | 377 | |
87b315a5 SW |
378 | /* |
379 | * return true if this connection ever successfully opened | |
380 | */ | |
381 | bool ceph_con_opened(struct ceph_connection *con) | |
382 | { | |
383 | return con->connect_seq > 0; | |
384 | } | |
385 | ||
31b8006e SW |
386 | /* |
387 | * generic get/put | |
388 | */ | |
389 | struct ceph_connection *ceph_con_get(struct ceph_connection *con) | |
390 | { | |
391 | dout("con_get %p nref = %d -> %d\n", con, | |
392 | atomic_read(&con->nref), atomic_read(&con->nref) + 1); | |
393 | if (atomic_inc_not_zero(&con->nref)) | |
394 | return con; | |
395 | return NULL; | |
396 | } | |
397 | ||
398 | void ceph_con_put(struct ceph_connection *con) | |
399 | { | |
400 | dout("con_put %p nref = %d -> %d\n", con, | |
401 | atomic_read(&con->nref), atomic_read(&con->nref) - 1); | |
402 | BUG_ON(atomic_read(&con->nref) == 0); | |
403 | if (atomic_dec_and_test(&con->nref)) { | |
71ececda | 404 | BUG_ON(con->sock); |
31b8006e SW |
405 | kfree(con); |
406 | } | |
407 | } | |
408 | ||
409 | /* | |
410 | * initialize a new connection. | |
411 | */ | |
412 | void ceph_con_init(struct ceph_messenger *msgr, struct ceph_connection *con) | |
413 | { | |
414 | dout("con_init %p\n", con); | |
415 | memset(con, 0, sizeof(*con)); | |
416 | atomic_set(&con->nref, 1); | |
417 | con->msgr = msgr; | |
ec302645 | 418 | mutex_init(&con->mutex); |
31b8006e SW |
419 | INIT_LIST_HEAD(&con->out_queue); |
420 | INIT_LIST_HEAD(&con->out_sent); | |
421 | INIT_DELAYED_WORK(&con->work, con_work); | |
422 | } | |
3d14c5d2 | 423 | EXPORT_SYMBOL(ceph_con_init); |
31b8006e SW |
424 | |
425 | ||
426 | /* | |
427 | * We maintain a global counter to order connection attempts. Get | |
428 | * a unique seq greater than @gt. | |
429 | */ | |
430 | static u32 get_global_seq(struct ceph_messenger *msgr, u32 gt) | |
431 | { | |
432 | u32 ret; | |
433 | ||
434 | spin_lock(&msgr->global_seq_lock); | |
435 | if (msgr->global_seq < gt) | |
436 | msgr->global_seq = gt; | |
437 | ret = ++msgr->global_seq; | |
438 | spin_unlock(&msgr->global_seq_lock); | |
439 | return ret; | |
440 | } | |
441 | ||
442 | ||
443 | /* | |
444 | * Prepare footer for currently outgoing message, and finish things | |
445 | * off. Assumes out_kvec* are already valid.. we just add on to the end. | |
446 | */ | |
447 | static void prepare_write_message_footer(struct ceph_connection *con, int v) | |
448 | { | |
449 | struct ceph_msg *m = con->out_msg; | |
450 | ||
451 | dout("prepare_write_message_footer %p\n", con); | |
452 | con->out_kvec_is_msg = true; | |
453 | con->out_kvec[v].iov_base = &m->footer; | |
454 | con->out_kvec[v].iov_len = sizeof(m->footer); | |
455 | con->out_kvec_bytes += sizeof(m->footer); | |
456 | con->out_kvec_left++; | |
457 | con->out_more = m->more_to_follow; | |
c86a2930 | 458 | con->out_msg_done = true; |
31b8006e SW |
459 | } |
460 | ||
461 | /* | |
462 | * Prepare headers for the next outgoing message. | |
463 | */ | |
464 | static void prepare_write_message(struct ceph_connection *con) | |
465 | { | |
466 | struct ceph_msg *m; | |
467 | int v = 0; | |
468 | ||
469 | con->out_kvec_bytes = 0; | |
470 | con->out_kvec_is_msg = true; | |
c86a2930 | 471 | con->out_msg_done = false; |
31b8006e SW |
472 | |
473 | /* Sneak an ack in there first? If we can get it into the same | |
474 | * TCP packet that's a good thing. */ | |
475 | if (con->in_seq > con->in_seq_acked) { | |
476 | con->in_seq_acked = con->in_seq; | |
477 | con->out_kvec[v].iov_base = &tag_ack; | |
478 | con->out_kvec[v++].iov_len = 1; | |
479 | con->out_temp_ack = cpu_to_le64(con->in_seq_acked); | |
480 | con->out_kvec[v].iov_base = &con->out_temp_ack; | |
481 | con->out_kvec[v++].iov_len = sizeof(con->out_temp_ack); | |
482 | con->out_kvec_bytes = 1 + sizeof(con->out_temp_ack); | |
483 | } | |
484 | ||
31b8006e SW |
485 | m = list_first_entry(&con->out_queue, |
486 | struct ceph_msg, list_head); | |
c86a2930 | 487 | con->out_msg = m; |
b3d1dbbd | 488 | if (test_bit(LOSSYTX, &con->state)) { |
6c5d1a49 SW |
489 | list_del_init(&m->list_head); |
490 | } else { | |
b3d1dbbd SW |
491 | /* put message on sent list */ |
492 | ceph_msg_get(m); | |
493 | list_move_tail(&m->list_head, &con->out_sent); | |
b3d1dbbd | 494 | } |
31b8006e | 495 | |
e84346b7 SW |
496 | /* |
497 | * only assign outgoing seq # if we haven't sent this message | |
498 | * yet. if it is requeued, resend with it's original seq. | |
499 | */ | |
500 | if (m->needs_out_seq) { | |
501 | m->hdr.seq = cpu_to_le64(++con->out_seq); | |
502 | m->needs_out_seq = false; | |
503 | } | |
31b8006e SW |
504 | |
505 | dout("prepare_write_message %p seq %lld type %d len %d+%d+%d %d pgs\n", | |
506 | m, con->out_seq, le16_to_cpu(m->hdr.type), | |
507 | le32_to_cpu(m->hdr.front_len), le32_to_cpu(m->hdr.middle_len), | |
508 | le32_to_cpu(m->hdr.data_len), | |
509 | m->nr_pages); | |
510 | BUG_ON(le32_to_cpu(m->hdr.front_len) != m->front.iov_len); | |
511 | ||
512 | /* tag + hdr + front + middle */ | |
513 | con->out_kvec[v].iov_base = &tag_msg; | |
514 | con->out_kvec[v++].iov_len = 1; | |
515 | con->out_kvec[v].iov_base = &m->hdr; | |
516 | con->out_kvec[v++].iov_len = sizeof(m->hdr); | |
517 | con->out_kvec[v++] = m->front; | |
518 | if (m->middle) | |
519 | con->out_kvec[v++] = m->middle->vec; | |
520 | con->out_kvec_left = v; | |
521 | con->out_kvec_bytes += 1 + sizeof(m->hdr) + m->front.iov_len + | |
522 | (m->middle ? m->middle->vec.iov_len : 0); | |
523 | con->out_kvec_cur = con->out_kvec; | |
524 | ||
525 | /* fill in crc (except data pages), footer */ | |
526 | con->out_msg->hdr.crc = | |
527 | cpu_to_le32(crc32c(0, (void *)&m->hdr, | |
528 | sizeof(m->hdr) - sizeof(m->hdr.crc))); | |
529 | con->out_msg->footer.flags = CEPH_MSG_FOOTER_COMPLETE; | |
530 | con->out_msg->footer.front_crc = | |
531 | cpu_to_le32(crc32c(0, m->front.iov_base, m->front.iov_len)); | |
532 | if (m->middle) | |
533 | con->out_msg->footer.middle_crc = | |
534 | cpu_to_le32(crc32c(0, m->middle->vec.iov_base, | |
535 | m->middle->vec.iov_len)); | |
536 | else | |
537 | con->out_msg->footer.middle_crc = 0; | |
538 | con->out_msg->footer.data_crc = 0; | |
539 | dout("prepare_write_message front_crc %u data_crc %u\n", | |
540 | le32_to_cpu(con->out_msg->footer.front_crc), | |
541 | le32_to_cpu(con->out_msg->footer.middle_crc)); | |
542 | ||
543 | /* is there a data payload? */ | |
544 | if (le32_to_cpu(m->hdr.data_len) > 0) { | |
545 | /* initialize page iterator */ | |
546 | con->out_msg_pos.page = 0; | |
68b4476b | 547 | if (m->pages) |
c5c6b19d | 548 | con->out_msg_pos.page_pos = m->page_alignment; |
68b4476b YS |
549 | else |
550 | con->out_msg_pos.page_pos = 0; | |
31b8006e SW |
551 | con->out_msg_pos.data_pos = 0; |
552 | con->out_msg_pos.did_page_crc = 0; | |
553 | con->out_more = 1; /* data + footer will follow */ | |
554 | } else { | |
555 | /* no, queue up footer too and be done */ | |
556 | prepare_write_message_footer(con, v); | |
557 | } | |
558 | ||
559 | set_bit(WRITE_PENDING, &con->state); | |
560 | } | |
561 | ||
562 | /* | |
563 | * Prepare an ack. | |
564 | */ | |
565 | static void prepare_write_ack(struct ceph_connection *con) | |
566 | { | |
567 | dout("prepare_write_ack %p %llu -> %llu\n", con, | |
568 | con->in_seq_acked, con->in_seq); | |
569 | con->in_seq_acked = con->in_seq; | |
570 | ||
571 | con->out_kvec[0].iov_base = &tag_ack; | |
572 | con->out_kvec[0].iov_len = 1; | |
573 | con->out_temp_ack = cpu_to_le64(con->in_seq_acked); | |
574 | con->out_kvec[1].iov_base = &con->out_temp_ack; | |
575 | con->out_kvec[1].iov_len = sizeof(con->out_temp_ack); | |
576 | con->out_kvec_left = 2; | |
577 | con->out_kvec_bytes = 1 + sizeof(con->out_temp_ack); | |
578 | con->out_kvec_cur = con->out_kvec; | |
579 | con->out_more = 1; /* more will follow.. eventually.. */ | |
580 | set_bit(WRITE_PENDING, &con->state); | |
581 | } | |
582 | ||
583 | /* | |
584 | * Prepare to write keepalive byte. | |
585 | */ | |
586 | static void prepare_write_keepalive(struct ceph_connection *con) | |
587 | { | |
588 | dout("prepare_write_keepalive %p\n", con); | |
589 | con->out_kvec[0].iov_base = &tag_keepalive; | |
590 | con->out_kvec[0].iov_len = 1; | |
591 | con->out_kvec_left = 1; | |
592 | con->out_kvec_bytes = 1; | |
593 | con->out_kvec_cur = con->out_kvec; | |
594 | set_bit(WRITE_PENDING, &con->state); | |
595 | } | |
596 | ||
597 | /* | |
598 | * Connection negotiation. | |
599 | */ | |
600 | ||
4e7a5dcd SW |
601 | static void prepare_connect_authorizer(struct ceph_connection *con) |
602 | { | |
603 | void *auth_buf; | |
604 | int auth_len = 0; | |
605 | int auth_protocol = 0; | |
606 | ||
ec302645 | 607 | mutex_unlock(&con->mutex); |
4e7a5dcd SW |
608 | if (con->ops->get_authorizer) |
609 | con->ops->get_authorizer(con, &auth_buf, &auth_len, | |
610 | &auth_protocol, &con->auth_reply_buf, | |
611 | &con->auth_reply_buf_len, | |
612 | con->auth_retry); | |
ec302645 | 613 | mutex_lock(&con->mutex); |
4e7a5dcd SW |
614 | |
615 | con->out_connect.authorizer_protocol = cpu_to_le32(auth_protocol); | |
616 | con->out_connect.authorizer_len = cpu_to_le32(auth_len); | |
617 | ||
618 | con->out_kvec[con->out_kvec_left].iov_base = auth_buf; | |
619 | con->out_kvec[con->out_kvec_left].iov_len = auth_len; | |
620 | con->out_kvec_left++; | |
621 | con->out_kvec_bytes += auth_len; | |
622 | } | |
623 | ||
31b8006e SW |
624 | /* |
625 | * We connected to a peer and are saying hello. | |
626 | */ | |
eed0ef2c SW |
627 | static void prepare_write_banner(struct ceph_messenger *msgr, |
628 | struct ceph_connection *con) | |
31b8006e SW |
629 | { |
630 | int len = strlen(CEPH_BANNER); | |
eed0ef2c SW |
631 | |
632 | con->out_kvec[0].iov_base = CEPH_BANNER; | |
633 | con->out_kvec[0].iov_len = len; | |
634 | con->out_kvec[1].iov_base = &msgr->my_enc_addr; | |
635 | con->out_kvec[1].iov_len = sizeof(msgr->my_enc_addr); | |
636 | con->out_kvec_left = 2; | |
637 | con->out_kvec_bytes = len + sizeof(msgr->my_enc_addr); | |
638 | con->out_kvec_cur = con->out_kvec; | |
639 | con->out_more = 0; | |
640 | set_bit(WRITE_PENDING, &con->state); | |
641 | } | |
642 | ||
643 | static void prepare_write_connect(struct ceph_messenger *msgr, | |
644 | struct ceph_connection *con, | |
645 | int after_banner) | |
646 | { | |
31b8006e SW |
647 | unsigned global_seq = get_global_seq(con->msgr, 0); |
648 | int proto; | |
649 | ||
650 | switch (con->peer_name.type) { | |
651 | case CEPH_ENTITY_TYPE_MON: | |
652 | proto = CEPH_MONC_PROTOCOL; | |
653 | break; | |
654 | case CEPH_ENTITY_TYPE_OSD: | |
655 | proto = CEPH_OSDC_PROTOCOL; | |
656 | break; | |
657 | case CEPH_ENTITY_TYPE_MDS: | |
658 | proto = CEPH_MDSC_PROTOCOL; | |
659 | break; | |
660 | default: | |
661 | BUG(); | |
662 | } | |
663 | ||
664 | dout("prepare_write_connect %p cseq=%d gseq=%d proto=%d\n", con, | |
665 | con->connect_seq, global_seq, proto); | |
4e7a5dcd | 666 | |
3d14c5d2 | 667 | con->out_connect.features = cpu_to_le64(msgr->supported_features); |
31b8006e SW |
668 | con->out_connect.host_type = cpu_to_le32(CEPH_ENTITY_TYPE_CLIENT); |
669 | con->out_connect.connect_seq = cpu_to_le32(con->connect_seq); | |
670 | con->out_connect.global_seq = cpu_to_le32(global_seq); | |
671 | con->out_connect.protocol_version = cpu_to_le32(proto); | |
672 | con->out_connect.flags = 0; | |
31b8006e | 673 | |
eed0ef2c SW |
674 | if (!after_banner) { |
675 | con->out_kvec_left = 0; | |
676 | con->out_kvec_bytes = 0; | |
677 | } | |
678 | con->out_kvec[con->out_kvec_left].iov_base = &con->out_connect; | |
679 | con->out_kvec[con->out_kvec_left].iov_len = sizeof(con->out_connect); | |
680 | con->out_kvec_left++; | |
681 | con->out_kvec_bytes += sizeof(con->out_connect); | |
31b8006e SW |
682 | con->out_kvec_cur = con->out_kvec; |
683 | con->out_more = 0; | |
684 | set_bit(WRITE_PENDING, &con->state); | |
4e7a5dcd SW |
685 | |
686 | prepare_connect_authorizer(con); | |
31b8006e SW |
687 | } |
688 | ||
689 | ||
690 | /* | |
691 | * write as much of pending kvecs to the socket as we can. | |
692 | * 1 -> done | |
693 | * 0 -> socket full, but more to do | |
694 | * <0 -> error | |
695 | */ | |
696 | static int write_partial_kvec(struct ceph_connection *con) | |
697 | { | |
698 | int ret; | |
699 | ||
700 | dout("write_partial_kvec %p %d left\n", con, con->out_kvec_bytes); | |
701 | while (con->out_kvec_bytes > 0) { | |
702 | ret = ceph_tcp_sendmsg(con->sock, con->out_kvec_cur, | |
703 | con->out_kvec_left, con->out_kvec_bytes, | |
704 | con->out_more); | |
705 | if (ret <= 0) | |
706 | goto out; | |
707 | con->out_kvec_bytes -= ret; | |
708 | if (con->out_kvec_bytes == 0) | |
709 | break; /* done */ | |
710 | while (ret > 0) { | |
711 | if (ret >= con->out_kvec_cur->iov_len) { | |
712 | ret -= con->out_kvec_cur->iov_len; | |
713 | con->out_kvec_cur++; | |
714 | con->out_kvec_left--; | |
715 | } else { | |
716 | con->out_kvec_cur->iov_len -= ret; | |
717 | con->out_kvec_cur->iov_base += ret; | |
718 | ret = 0; | |
719 | break; | |
720 | } | |
721 | } | |
722 | } | |
723 | con->out_kvec_left = 0; | |
724 | con->out_kvec_is_msg = false; | |
725 | ret = 1; | |
726 | out: | |
727 | dout("write_partial_kvec %p %d left in %d kvecs ret = %d\n", con, | |
728 | con->out_kvec_bytes, con->out_kvec_left, ret); | |
729 | return ret; /* done! */ | |
730 | } | |
731 | ||
68b4476b YS |
732 | #ifdef CONFIG_BLOCK |
733 | static void init_bio_iter(struct bio *bio, struct bio **iter, int *seg) | |
734 | { | |
735 | if (!bio) { | |
736 | *iter = NULL; | |
737 | *seg = 0; | |
738 | return; | |
739 | } | |
740 | *iter = bio; | |
741 | *seg = bio->bi_idx; | |
742 | } | |
743 | ||
744 | static void iter_bio_next(struct bio **bio_iter, int *seg) | |
745 | { | |
746 | if (*bio_iter == NULL) | |
747 | return; | |
748 | ||
749 | BUG_ON(*seg >= (*bio_iter)->bi_vcnt); | |
750 | ||
751 | (*seg)++; | |
752 | if (*seg == (*bio_iter)->bi_vcnt) | |
753 | init_bio_iter((*bio_iter)->bi_next, bio_iter, seg); | |
754 | } | |
755 | #endif | |
756 | ||
31b8006e SW |
757 | /* |
758 | * Write as much message data payload as we can. If we finish, queue | |
759 | * up the footer. | |
760 | * 1 -> done, footer is now queued in out_kvec[]. | |
761 | * 0 -> socket full, but more to do | |
762 | * <0 -> error | |
763 | */ | |
764 | static int write_partial_msg_pages(struct ceph_connection *con) | |
765 | { | |
766 | struct ceph_msg *msg = con->out_msg; | |
767 | unsigned data_len = le32_to_cpu(msg->hdr.data_len); | |
768 | size_t len; | |
769 | int crc = con->msgr->nocrc; | |
770 | int ret; | |
68b4476b YS |
771 | int total_max_write; |
772 | int in_trail = 0; | |
773 | size_t trail_len = (msg->trail ? msg->trail->length : 0); | |
31b8006e SW |
774 | |
775 | dout("write_partial_msg_pages %p msg %p page %d/%d offset %d\n", | |
776 | con, con->out_msg, con->out_msg_pos.page, con->out_msg->nr_pages, | |
777 | con->out_msg_pos.page_pos); | |
778 | ||
68b4476b YS |
779 | #ifdef CONFIG_BLOCK |
780 | if (msg->bio && !msg->bio_iter) | |
781 | init_bio_iter(msg->bio, &msg->bio_iter, &msg->bio_seg); | |
782 | #endif | |
783 | ||
784 | while (data_len > con->out_msg_pos.data_pos) { | |
31b8006e SW |
785 | struct page *page = NULL; |
786 | void *kaddr = NULL; | |
68b4476b YS |
787 | int max_write = PAGE_SIZE; |
788 | int page_shift = 0; | |
789 | ||
790 | total_max_write = data_len - trail_len - | |
791 | con->out_msg_pos.data_pos; | |
31b8006e SW |
792 | |
793 | /* | |
794 | * if we are calculating the data crc (the default), we need | |
795 | * to map the page. if our pages[] has been revoked, use the | |
796 | * zero page. | |
797 | */ | |
68b4476b YS |
798 | |
799 | /* have we reached the trail part of the data? */ | |
800 | if (con->out_msg_pos.data_pos >= data_len - trail_len) { | |
801 | in_trail = 1; | |
802 | ||
803 | total_max_write = data_len - con->out_msg_pos.data_pos; | |
804 | ||
805 | page = list_first_entry(&msg->trail->head, | |
806 | struct page, lru); | |
807 | if (crc) | |
808 | kaddr = kmap(page); | |
809 | max_write = PAGE_SIZE; | |
810 | } else if (msg->pages) { | |
31b8006e SW |
811 | page = msg->pages[con->out_msg_pos.page]; |
812 | if (crc) | |
813 | kaddr = kmap(page); | |
58bb3b37 SW |
814 | } else if (msg->pagelist) { |
815 | page = list_first_entry(&msg->pagelist->head, | |
816 | struct page, lru); | |
817 | if (crc) | |
818 | kaddr = kmap(page); | |
68b4476b YS |
819 | #ifdef CONFIG_BLOCK |
820 | } else if (msg->bio) { | |
821 | struct bio_vec *bv; | |
822 | ||
823 | bv = bio_iovec_idx(msg->bio_iter, msg->bio_seg); | |
824 | page = bv->bv_page; | |
825 | page_shift = bv->bv_offset; | |
826 | if (crc) | |
827 | kaddr = kmap(page) + page_shift; | |
828 | max_write = bv->bv_len; | |
829 | #endif | |
31b8006e SW |
830 | } else { |
831 | page = con->msgr->zero_page; | |
832 | if (crc) | |
833 | kaddr = page_address(con->msgr->zero_page); | |
834 | } | |
68b4476b YS |
835 | len = min_t(int, max_write - con->out_msg_pos.page_pos, |
836 | total_max_write); | |
837 | ||
31b8006e SW |
838 | if (crc && !con->out_msg_pos.did_page_crc) { |
839 | void *base = kaddr + con->out_msg_pos.page_pos; | |
840 | u32 tmpcrc = le32_to_cpu(con->out_msg->footer.data_crc); | |
841 | ||
842 | BUG_ON(kaddr == NULL); | |
843 | con->out_msg->footer.data_crc = | |
844 | cpu_to_le32(crc32c(tmpcrc, base, len)); | |
845 | con->out_msg_pos.did_page_crc = 1; | |
846 | } | |
31b8006e | 847 | ret = kernel_sendpage(con->sock, page, |
68b4476b YS |
848 | con->out_msg_pos.page_pos + page_shift, |
849 | len, | |
31b8006e SW |
850 | MSG_DONTWAIT | MSG_NOSIGNAL | |
851 | MSG_MORE); | |
852 | ||
68b4476b YS |
853 | if (crc && |
854 | (msg->pages || msg->pagelist || msg->bio || in_trail)) | |
31b8006e SW |
855 | kunmap(page); |
856 | ||
42961d23 SW |
857 | if (ret == -EAGAIN) |
858 | ret = 0; | |
31b8006e SW |
859 | if (ret <= 0) |
860 | goto out; | |
861 | ||
862 | con->out_msg_pos.data_pos += ret; | |
863 | con->out_msg_pos.page_pos += ret; | |
864 | if (ret == len) { | |
865 | con->out_msg_pos.page_pos = 0; | |
866 | con->out_msg_pos.page++; | |
867 | con->out_msg_pos.did_page_crc = 0; | |
68b4476b YS |
868 | if (in_trail) |
869 | list_move_tail(&page->lru, | |
870 | &msg->trail->head); | |
871 | else if (msg->pagelist) | |
58bb3b37 SW |
872 | list_move_tail(&page->lru, |
873 | &msg->pagelist->head); | |
68b4476b YS |
874 | #ifdef CONFIG_BLOCK |
875 | else if (msg->bio) | |
876 | iter_bio_next(&msg->bio_iter, &msg->bio_seg); | |
877 | #endif | |
31b8006e SW |
878 | } |
879 | } | |
880 | ||
881 | dout("write_partial_msg_pages %p msg %p done\n", con, msg); | |
882 | ||
883 | /* prepare and queue up footer, too */ | |
884 | if (!crc) | |
885 | con->out_msg->footer.flags |= CEPH_MSG_FOOTER_NOCRC; | |
886 | con->out_kvec_bytes = 0; | |
887 | con->out_kvec_left = 0; | |
888 | con->out_kvec_cur = con->out_kvec; | |
889 | prepare_write_message_footer(con, 0); | |
890 | ret = 1; | |
891 | out: | |
892 | return ret; | |
893 | } | |
894 | ||
895 | /* | |
896 | * write some zeros | |
897 | */ | |
898 | static int write_partial_skip(struct ceph_connection *con) | |
899 | { | |
900 | int ret; | |
901 | ||
902 | while (con->out_skip > 0) { | |
903 | struct kvec iov = { | |
904 | .iov_base = page_address(con->msgr->zero_page), | |
905 | .iov_len = min(con->out_skip, (int)PAGE_CACHE_SIZE) | |
906 | }; | |
907 | ||
908 | ret = ceph_tcp_sendmsg(con->sock, &iov, 1, iov.iov_len, 1); | |
909 | if (ret <= 0) | |
910 | goto out; | |
911 | con->out_skip -= ret; | |
912 | } | |
913 | ret = 1; | |
914 | out: | |
915 | return ret; | |
916 | } | |
917 | ||
918 | /* | |
919 | * Prepare to read connection handshake, or an ack. | |
920 | */ | |
eed0ef2c SW |
921 | static void prepare_read_banner(struct ceph_connection *con) |
922 | { | |
923 | dout("prepare_read_banner %p\n", con); | |
924 | con->in_base_pos = 0; | |
925 | } | |
926 | ||
31b8006e SW |
927 | static void prepare_read_connect(struct ceph_connection *con) |
928 | { | |
929 | dout("prepare_read_connect %p\n", con); | |
930 | con->in_base_pos = 0; | |
931 | } | |
932 | ||
933 | static void prepare_read_ack(struct ceph_connection *con) | |
934 | { | |
935 | dout("prepare_read_ack %p\n", con); | |
936 | con->in_base_pos = 0; | |
937 | } | |
938 | ||
939 | static void prepare_read_tag(struct ceph_connection *con) | |
940 | { | |
941 | dout("prepare_read_tag %p\n", con); | |
942 | con->in_base_pos = 0; | |
943 | con->in_tag = CEPH_MSGR_TAG_READY; | |
944 | } | |
945 | ||
946 | /* | |
947 | * Prepare to read a message. | |
948 | */ | |
949 | static int prepare_read_message(struct ceph_connection *con) | |
950 | { | |
951 | dout("prepare_read_message %p\n", con); | |
952 | BUG_ON(con->in_msg != NULL); | |
953 | con->in_base_pos = 0; | |
954 | con->in_front_crc = con->in_middle_crc = con->in_data_crc = 0; | |
955 | return 0; | |
956 | } | |
957 | ||
958 | ||
959 | static int read_partial(struct ceph_connection *con, | |
960 | int *to, int size, void *object) | |
961 | { | |
962 | *to += size; | |
963 | while (con->in_base_pos < *to) { | |
964 | int left = *to - con->in_base_pos; | |
965 | int have = size - left; | |
966 | int ret = ceph_tcp_recvmsg(con->sock, object + have, left); | |
967 | if (ret <= 0) | |
968 | return ret; | |
969 | con->in_base_pos += ret; | |
970 | } | |
971 | return 1; | |
972 | } | |
973 | ||
974 | ||
975 | /* | |
976 | * Read all or part of the connect-side handshake on a new connection | |
977 | */ | |
eed0ef2c | 978 | static int read_partial_banner(struct ceph_connection *con) |
31b8006e SW |
979 | { |
980 | int ret, to = 0; | |
981 | ||
eed0ef2c | 982 | dout("read_partial_banner %p at %d\n", con, con->in_base_pos); |
31b8006e SW |
983 | |
984 | /* peer's banner */ | |
985 | ret = read_partial(con, &to, strlen(CEPH_BANNER), con->in_banner); | |
986 | if (ret <= 0) | |
987 | goto out; | |
988 | ret = read_partial(con, &to, sizeof(con->actual_peer_addr), | |
989 | &con->actual_peer_addr); | |
990 | if (ret <= 0) | |
991 | goto out; | |
992 | ret = read_partial(con, &to, sizeof(con->peer_addr_for_me), | |
993 | &con->peer_addr_for_me); | |
994 | if (ret <= 0) | |
995 | goto out; | |
eed0ef2c SW |
996 | out: |
997 | return ret; | |
998 | } | |
999 | ||
1000 | static int read_partial_connect(struct ceph_connection *con) | |
1001 | { | |
1002 | int ret, to = 0; | |
1003 | ||
1004 | dout("read_partial_connect %p at %d\n", con, con->in_base_pos); | |
1005 | ||
31b8006e SW |
1006 | ret = read_partial(con, &to, sizeof(con->in_reply), &con->in_reply); |
1007 | if (ret <= 0) | |
1008 | goto out; | |
4e7a5dcd SW |
1009 | ret = read_partial(con, &to, le32_to_cpu(con->in_reply.authorizer_len), |
1010 | con->auth_reply_buf); | |
1011 | if (ret <= 0) | |
1012 | goto out; | |
31b8006e | 1013 | |
4e7a5dcd SW |
1014 | dout("read_partial_connect %p tag %d, con_seq = %u, g_seq = %u\n", |
1015 | con, (int)con->in_reply.tag, | |
1016 | le32_to_cpu(con->in_reply.connect_seq), | |
31b8006e SW |
1017 | le32_to_cpu(con->in_reply.global_seq)); |
1018 | out: | |
1019 | return ret; | |
eed0ef2c | 1020 | |
31b8006e SW |
1021 | } |
1022 | ||
1023 | /* | |
1024 | * Verify the hello banner looks okay. | |
1025 | */ | |
1026 | static int verify_hello(struct ceph_connection *con) | |
1027 | { | |
1028 | if (memcmp(con->in_banner, CEPH_BANNER, strlen(CEPH_BANNER))) { | |
13e38c8a | 1029 | pr_err("connect to %s got bad banner\n", |
3d14c5d2 | 1030 | ceph_pr_addr(&con->peer_addr.in_addr)); |
31b8006e SW |
1031 | con->error_msg = "protocol error, bad banner"; |
1032 | return -1; | |
1033 | } | |
1034 | return 0; | |
1035 | } | |
1036 | ||
1037 | static bool addr_is_blank(struct sockaddr_storage *ss) | |
1038 | { | |
1039 | switch (ss->ss_family) { | |
1040 | case AF_INET: | |
1041 | return ((struct sockaddr_in *)ss)->sin_addr.s_addr == 0; | |
1042 | case AF_INET6: | |
1043 | return | |
1044 | ((struct sockaddr_in6 *)ss)->sin6_addr.s6_addr32[0] == 0 && | |
1045 | ((struct sockaddr_in6 *)ss)->sin6_addr.s6_addr32[1] == 0 && | |
1046 | ((struct sockaddr_in6 *)ss)->sin6_addr.s6_addr32[2] == 0 && | |
1047 | ((struct sockaddr_in6 *)ss)->sin6_addr.s6_addr32[3] == 0; | |
1048 | } | |
1049 | return false; | |
1050 | } | |
1051 | ||
1052 | static int addr_port(struct sockaddr_storage *ss) | |
1053 | { | |
1054 | switch (ss->ss_family) { | |
1055 | case AF_INET: | |
f28bcfbe | 1056 | return ntohs(((struct sockaddr_in *)ss)->sin_port); |
31b8006e | 1057 | case AF_INET6: |
f28bcfbe | 1058 | return ntohs(((struct sockaddr_in6 *)ss)->sin6_port); |
31b8006e SW |
1059 | } |
1060 | return 0; | |
1061 | } | |
1062 | ||
1063 | static void addr_set_port(struct sockaddr_storage *ss, int p) | |
1064 | { | |
1065 | switch (ss->ss_family) { | |
1066 | case AF_INET: | |
1067 | ((struct sockaddr_in *)ss)->sin_port = htons(p); | |
1068 | case AF_INET6: | |
1069 | ((struct sockaddr_in6 *)ss)->sin6_port = htons(p); | |
1070 | } | |
1071 | } | |
1072 | ||
1073 | /* | |
1074 | * Parse an ip[:port] list into an addr array. Use the default | |
1075 | * monitor port if a port isn't specified. | |
1076 | */ | |
1077 | int ceph_parse_ips(const char *c, const char *end, | |
1078 | struct ceph_entity_addr *addr, | |
1079 | int max_count, int *count) | |
1080 | { | |
1081 | int i; | |
1082 | const char *p = c; | |
1083 | ||
1084 | dout("parse_ips on '%.*s'\n", (int)(end-c), c); | |
1085 | for (i = 0; i < max_count; i++) { | |
1086 | const char *ipend; | |
1087 | struct sockaddr_storage *ss = &addr[i].in_addr; | |
1088 | struct sockaddr_in *in4 = (void *)ss; | |
1089 | struct sockaddr_in6 *in6 = (void *)ss; | |
1090 | int port; | |
39139f64 SW |
1091 | char delim = ','; |
1092 | ||
1093 | if (*p == '[') { | |
1094 | delim = ']'; | |
1095 | p++; | |
1096 | } | |
31b8006e SW |
1097 | |
1098 | memset(ss, 0, sizeof(*ss)); | |
1099 | if (in4_pton(p, end - p, (u8 *)&in4->sin_addr.s_addr, | |
39139f64 | 1100 | delim, &ipend)) |
31b8006e | 1101 | ss->ss_family = AF_INET; |
39139f64 SW |
1102 | else if (in6_pton(p, end - p, (u8 *)&in6->sin6_addr.s6_addr, |
1103 | delim, &ipend)) | |
31b8006e | 1104 | ss->ss_family = AF_INET6; |
39139f64 | 1105 | else |
31b8006e | 1106 | goto bad; |
31b8006e SW |
1107 | p = ipend; |
1108 | ||
39139f64 SW |
1109 | if (delim == ']') { |
1110 | if (*p != ']') { | |
1111 | dout("missing matching ']'\n"); | |
1112 | goto bad; | |
1113 | } | |
1114 | p++; | |
1115 | } | |
1116 | ||
31b8006e SW |
1117 | /* port? */ |
1118 | if (p < end && *p == ':') { | |
1119 | port = 0; | |
1120 | p++; | |
1121 | while (p < end && *p >= '0' && *p <= '9') { | |
1122 | port = (port * 10) + (*p - '0'); | |
1123 | p++; | |
1124 | } | |
1125 | if (port > 65535 || port == 0) | |
1126 | goto bad; | |
1127 | } else { | |
1128 | port = CEPH_MON_PORT; | |
1129 | } | |
1130 | ||
1131 | addr_set_port(ss, port); | |
1132 | ||
3d14c5d2 | 1133 | dout("parse_ips got %s\n", ceph_pr_addr(ss)); |
31b8006e SW |
1134 | |
1135 | if (p == end) | |
1136 | break; | |
1137 | if (*p != ',') | |
1138 | goto bad; | |
1139 | p++; | |
1140 | } | |
1141 | ||
1142 | if (p != end) | |
1143 | goto bad; | |
1144 | ||
1145 | if (count) | |
1146 | *count = i + 1; | |
1147 | return 0; | |
1148 | ||
1149 | bad: | |
39139f64 | 1150 | pr_err("parse_ips bad ip '%.*s'\n", (int)(end - c), c); |
31b8006e SW |
1151 | return -EINVAL; |
1152 | } | |
3d14c5d2 | 1153 | EXPORT_SYMBOL(ceph_parse_ips); |
31b8006e | 1154 | |
eed0ef2c | 1155 | static int process_banner(struct ceph_connection *con) |
31b8006e | 1156 | { |
eed0ef2c | 1157 | dout("process_banner on %p\n", con); |
31b8006e SW |
1158 | |
1159 | if (verify_hello(con) < 0) | |
1160 | return -1; | |
1161 | ||
63f2d211 SW |
1162 | ceph_decode_addr(&con->actual_peer_addr); |
1163 | ceph_decode_addr(&con->peer_addr_for_me); | |
1164 | ||
31b8006e SW |
1165 | /* |
1166 | * Make sure the other end is who we wanted. note that the other | |
1167 | * end may not yet know their ip address, so if it's 0.0.0.0, give | |
1168 | * them the benefit of the doubt. | |
1169 | */ | |
103e2d3a SW |
1170 | if (memcmp(&con->peer_addr, &con->actual_peer_addr, |
1171 | sizeof(con->peer_addr)) != 0 && | |
31b8006e SW |
1172 | !(addr_is_blank(&con->actual_peer_addr.in_addr) && |
1173 | con->actual_peer_addr.nonce == con->peer_addr.nonce)) { | |
cd84db6e | 1174 | pr_warning("wrong peer, want %s/%d, got %s/%d\n", |
3d14c5d2 | 1175 | ceph_pr_addr(&con->peer_addr.in_addr), |
cd84db6e | 1176 | (int)le32_to_cpu(con->peer_addr.nonce), |
3d14c5d2 | 1177 | ceph_pr_addr(&con->actual_peer_addr.in_addr), |
cd84db6e | 1178 | (int)le32_to_cpu(con->actual_peer_addr.nonce)); |
58bb3b37 | 1179 | con->error_msg = "wrong peer at address"; |
31b8006e SW |
1180 | return -1; |
1181 | } | |
1182 | ||
1183 | /* | |
1184 | * did we learn our address? | |
1185 | */ | |
1186 | if (addr_is_blank(&con->msgr->inst.addr.in_addr)) { | |
1187 | int port = addr_port(&con->msgr->inst.addr.in_addr); | |
1188 | ||
1189 | memcpy(&con->msgr->inst.addr.in_addr, | |
1190 | &con->peer_addr_for_me.in_addr, | |
1191 | sizeof(con->peer_addr_for_me.in_addr)); | |
1192 | addr_set_port(&con->msgr->inst.addr.in_addr, port); | |
63f2d211 | 1193 | encode_my_addr(con->msgr); |
eed0ef2c | 1194 | dout("process_banner learned my addr is %s\n", |
3d14c5d2 | 1195 | ceph_pr_addr(&con->msgr->inst.addr.in_addr)); |
31b8006e SW |
1196 | } |
1197 | ||
eed0ef2c SW |
1198 | set_bit(NEGOTIATING, &con->state); |
1199 | prepare_read_connect(con); | |
1200 | return 0; | |
1201 | } | |
1202 | ||
04a419f9 SW |
1203 | static void fail_protocol(struct ceph_connection *con) |
1204 | { | |
1205 | reset_connection(con); | |
1206 | set_bit(CLOSED, &con->state); /* in case there's queued work */ | |
1207 | ||
1208 | mutex_unlock(&con->mutex); | |
1209 | if (con->ops->bad_proto) | |
1210 | con->ops->bad_proto(con); | |
1211 | mutex_lock(&con->mutex); | |
1212 | } | |
1213 | ||
eed0ef2c SW |
1214 | static int process_connect(struct ceph_connection *con) |
1215 | { | |
3d14c5d2 YS |
1216 | u64 sup_feat = con->msgr->supported_features; |
1217 | u64 req_feat = con->msgr->required_features; | |
04a419f9 SW |
1218 | u64 server_feat = le64_to_cpu(con->in_reply.features); |
1219 | ||
eed0ef2c SW |
1220 | dout("process_connect on %p tag %d\n", con, (int)con->in_tag); |
1221 | ||
31b8006e | 1222 | switch (con->in_reply.tag) { |
04a419f9 SW |
1223 | case CEPH_MSGR_TAG_FEATURES: |
1224 | pr_err("%s%lld %s feature set mismatch," | |
1225 | " my %llx < server's %llx, missing %llx\n", | |
1226 | ENTITY_NAME(con->peer_name), | |
3d14c5d2 | 1227 | ceph_pr_addr(&con->peer_addr.in_addr), |
04a419f9 SW |
1228 | sup_feat, server_feat, server_feat & ~sup_feat); |
1229 | con->error_msg = "missing required protocol features"; | |
1230 | fail_protocol(con); | |
1231 | return -1; | |
1232 | ||
31b8006e | 1233 | case CEPH_MSGR_TAG_BADPROTOVER: |
31b8006e SW |
1234 | pr_err("%s%lld %s protocol version mismatch," |
1235 | " my %d != server's %d\n", | |
1236 | ENTITY_NAME(con->peer_name), | |
3d14c5d2 | 1237 | ceph_pr_addr(&con->peer_addr.in_addr), |
31b8006e SW |
1238 | le32_to_cpu(con->out_connect.protocol_version), |
1239 | le32_to_cpu(con->in_reply.protocol_version)); | |
1240 | con->error_msg = "protocol version mismatch"; | |
04a419f9 | 1241 | fail_protocol(con); |
31b8006e SW |
1242 | return -1; |
1243 | ||
4e7a5dcd SW |
1244 | case CEPH_MSGR_TAG_BADAUTHORIZER: |
1245 | con->auth_retry++; | |
1246 | dout("process_connect %p got BADAUTHORIZER attempt %d\n", con, | |
1247 | con->auth_retry); | |
1248 | if (con->auth_retry == 2) { | |
1249 | con->error_msg = "connect authorization failure"; | |
4e7a5dcd SW |
1250 | return -1; |
1251 | } | |
1252 | con->auth_retry = 1; | |
1253 | prepare_write_connect(con->msgr, con, 0); | |
63733a0f | 1254 | prepare_read_connect(con); |
4e7a5dcd | 1255 | break; |
31b8006e SW |
1256 | |
1257 | case CEPH_MSGR_TAG_RESETSESSION: | |
1258 | /* | |
1259 | * If we connected with a large connect_seq but the peer | |
1260 | * has no record of a session with us (no connection, or | |
1261 | * connect_seq == 0), they will send RESETSESION to indicate | |
1262 | * that they must have reset their session, and may have | |
1263 | * dropped messages. | |
1264 | */ | |
1265 | dout("process_connect got RESET peer seq %u\n", | |
1266 | le32_to_cpu(con->in_connect.connect_seq)); | |
1267 | pr_err("%s%lld %s connection reset\n", | |
1268 | ENTITY_NAME(con->peer_name), | |
3d14c5d2 | 1269 | ceph_pr_addr(&con->peer_addr.in_addr)); |
31b8006e | 1270 | reset_connection(con); |
eed0ef2c | 1271 | prepare_write_connect(con->msgr, con, 0); |
31b8006e SW |
1272 | prepare_read_connect(con); |
1273 | ||
1274 | /* Tell ceph about it. */ | |
ec302645 | 1275 | mutex_unlock(&con->mutex); |
31b8006e SW |
1276 | pr_info("reset on %s%lld\n", ENTITY_NAME(con->peer_name)); |
1277 | if (con->ops->peer_reset) | |
1278 | con->ops->peer_reset(con); | |
ec302645 | 1279 | mutex_lock(&con->mutex); |
31b8006e SW |
1280 | break; |
1281 | ||
1282 | case CEPH_MSGR_TAG_RETRY_SESSION: | |
1283 | /* | |
1284 | * If we sent a smaller connect_seq than the peer has, try | |
1285 | * again with a larger value. | |
1286 | */ | |
1287 | dout("process_connect got RETRY my seq = %u, peer_seq = %u\n", | |
1288 | le32_to_cpu(con->out_connect.connect_seq), | |
1289 | le32_to_cpu(con->in_connect.connect_seq)); | |
1290 | con->connect_seq = le32_to_cpu(con->in_connect.connect_seq); | |
eed0ef2c | 1291 | prepare_write_connect(con->msgr, con, 0); |
31b8006e SW |
1292 | prepare_read_connect(con); |
1293 | break; | |
1294 | ||
1295 | case CEPH_MSGR_TAG_RETRY_GLOBAL: | |
1296 | /* | |
1297 | * If we sent a smaller global_seq than the peer has, try | |
1298 | * again with a larger value. | |
1299 | */ | |
eed0ef2c | 1300 | dout("process_connect got RETRY_GLOBAL my %u peer_gseq %u\n", |
31b8006e SW |
1301 | con->peer_global_seq, |
1302 | le32_to_cpu(con->in_connect.global_seq)); | |
1303 | get_global_seq(con->msgr, | |
1304 | le32_to_cpu(con->in_connect.global_seq)); | |
eed0ef2c | 1305 | prepare_write_connect(con->msgr, con, 0); |
31b8006e SW |
1306 | prepare_read_connect(con); |
1307 | break; | |
1308 | ||
1309 | case CEPH_MSGR_TAG_READY: | |
04a419f9 SW |
1310 | if (req_feat & ~server_feat) { |
1311 | pr_err("%s%lld %s protocol feature mismatch," | |
1312 | " my required %llx > server's %llx, need %llx\n", | |
1313 | ENTITY_NAME(con->peer_name), | |
3d14c5d2 | 1314 | ceph_pr_addr(&con->peer_addr.in_addr), |
04a419f9 SW |
1315 | req_feat, server_feat, req_feat & ~server_feat); |
1316 | con->error_msg = "missing required protocol features"; | |
1317 | fail_protocol(con); | |
1318 | return -1; | |
1319 | } | |
31b8006e | 1320 | clear_bit(CONNECTING, &con->state); |
31b8006e SW |
1321 | con->peer_global_seq = le32_to_cpu(con->in_reply.global_seq); |
1322 | con->connect_seq++; | |
aba558e2 | 1323 | con->peer_features = server_feat; |
31b8006e SW |
1324 | dout("process_connect got READY gseq %d cseq %d (%d)\n", |
1325 | con->peer_global_seq, | |
1326 | le32_to_cpu(con->in_reply.connect_seq), | |
1327 | con->connect_seq); | |
1328 | WARN_ON(con->connect_seq != | |
1329 | le32_to_cpu(con->in_reply.connect_seq)); | |
92ac41d0 SW |
1330 | |
1331 | if (con->in_reply.flags & CEPH_MSG_CONNECT_LOSSY) | |
1332 | set_bit(LOSSYTX, &con->state); | |
1333 | ||
31b8006e SW |
1334 | prepare_read_tag(con); |
1335 | break; | |
1336 | ||
1337 | case CEPH_MSGR_TAG_WAIT: | |
1338 | /* | |
1339 | * If there is a connection race (we are opening | |
1340 | * connections to each other), one of us may just have | |
1341 | * to WAIT. This shouldn't happen if we are the | |
1342 | * client. | |
1343 | */ | |
1344 | pr_err("process_connect peer connecting WAIT\n"); | |
1345 | ||
1346 | default: | |
1347 | pr_err("connect protocol error, will retry\n"); | |
1348 | con->error_msg = "protocol error, garbage tag during connect"; | |
1349 | return -1; | |
1350 | } | |
1351 | return 0; | |
1352 | } | |
1353 | ||
1354 | ||
1355 | /* | |
1356 | * read (part of) an ack | |
1357 | */ | |
1358 | static int read_partial_ack(struct ceph_connection *con) | |
1359 | { | |
1360 | int to = 0; | |
1361 | ||
1362 | return read_partial(con, &to, sizeof(con->in_temp_ack), | |
1363 | &con->in_temp_ack); | |
1364 | } | |
1365 | ||
1366 | ||
1367 | /* | |
1368 | * We can finally discard anything that's been acked. | |
1369 | */ | |
1370 | static void process_ack(struct ceph_connection *con) | |
1371 | { | |
1372 | struct ceph_msg *m; | |
1373 | u64 ack = le64_to_cpu(con->in_temp_ack); | |
1374 | u64 seq; | |
1375 | ||
31b8006e SW |
1376 | while (!list_empty(&con->out_sent)) { |
1377 | m = list_first_entry(&con->out_sent, struct ceph_msg, | |
1378 | list_head); | |
1379 | seq = le64_to_cpu(m->hdr.seq); | |
1380 | if (seq > ack) | |
1381 | break; | |
1382 | dout("got ack for seq %llu type %d at %p\n", seq, | |
1383 | le16_to_cpu(m->hdr.type), m); | |
1384 | ceph_msg_remove(m); | |
1385 | } | |
31b8006e SW |
1386 | prepare_read_tag(con); |
1387 | } | |
1388 | ||
1389 | ||
1390 | ||
1391 | ||
2450418c | 1392 | static int read_partial_message_section(struct ceph_connection *con, |
213c99ee SW |
1393 | struct kvec *section, |
1394 | unsigned int sec_len, u32 *crc) | |
2450418c | 1395 | { |
68b4476b | 1396 | int ret, left; |
2450418c YS |
1397 | |
1398 | BUG_ON(!section); | |
1399 | ||
1400 | while (section->iov_len < sec_len) { | |
1401 | BUG_ON(section->iov_base == NULL); | |
1402 | left = sec_len - section->iov_len; | |
1403 | ret = ceph_tcp_recvmsg(con->sock, (char *)section->iov_base + | |
1404 | section->iov_len, left); | |
1405 | if (ret <= 0) | |
1406 | return ret; | |
1407 | section->iov_len += ret; | |
1408 | if (section->iov_len == sec_len) | |
1409 | *crc = crc32c(0, section->iov_base, | |
1410 | section->iov_len); | |
1411 | } | |
31b8006e | 1412 | |
2450418c YS |
1413 | return 1; |
1414 | } | |
31b8006e | 1415 | |
2450418c YS |
1416 | static struct ceph_msg *ceph_alloc_msg(struct ceph_connection *con, |
1417 | struct ceph_msg_header *hdr, | |
1418 | int *skip); | |
68b4476b YS |
1419 | |
1420 | ||
1421 | static int read_partial_message_pages(struct ceph_connection *con, | |
1422 | struct page **pages, | |
1423 | unsigned data_len, int datacrc) | |
1424 | { | |
1425 | void *p; | |
1426 | int ret; | |
1427 | int left; | |
1428 | ||
1429 | left = min((int)(data_len - con->in_msg_pos.data_pos), | |
1430 | (int)(PAGE_SIZE - con->in_msg_pos.page_pos)); | |
1431 | /* (page) data */ | |
1432 | BUG_ON(pages == NULL); | |
1433 | p = kmap(pages[con->in_msg_pos.page]); | |
1434 | ret = ceph_tcp_recvmsg(con->sock, p + con->in_msg_pos.page_pos, | |
1435 | left); | |
1436 | if (ret > 0 && datacrc) | |
1437 | con->in_data_crc = | |
1438 | crc32c(con->in_data_crc, | |
1439 | p + con->in_msg_pos.page_pos, ret); | |
1440 | kunmap(pages[con->in_msg_pos.page]); | |
1441 | if (ret <= 0) | |
1442 | return ret; | |
1443 | con->in_msg_pos.data_pos += ret; | |
1444 | con->in_msg_pos.page_pos += ret; | |
1445 | if (con->in_msg_pos.page_pos == PAGE_SIZE) { | |
1446 | con->in_msg_pos.page_pos = 0; | |
1447 | con->in_msg_pos.page++; | |
1448 | } | |
1449 | ||
1450 | return ret; | |
1451 | } | |
1452 | ||
1453 | #ifdef CONFIG_BLOCK | |
1454 | static int read_partial_message_bio(struct ceph_connection *con, | |
1455 | struct bio **bio_iter, int *bio_seg, | |
1456 | unsigned data_len, int datacrc) | |
1457 | { | |
1458 | struct bio_vec *bv = bio_iovec_idx(*bio_iter, *bio_seg); | |
1459 | void *p; | |
1460 | int ret, left; | |
1461 | ||
1462 | if (IS_ERR(bv)) | |
1463 | return PTR_ERR(bv); | |
1464 | ||
1465 | left = min((int)(data_len - con->in_msg_pos.data_pos), | |
1466 | (int)(bv->bv_len - con->in_msg_pos.page_pos)); | |
1467 | ||
1468 | p = kmap(bv->bv_page) + bv->bv_offset; | |
1469 | ||
1470 | ret = ceph_tcp_recvmsg(con->sock, p + con->in_msg_pos.page_pos, | |
1471 | left); | |
1472 | if (ret > 0 && datacrc) | |
1473 | con->in_data_crc = | |
1474 | crc32c(con->in_data_crc, | |
1475 | p + con->in_msg_pos.page_pos, ret); | |
1476 | kunmap(bv->bv_page); | |
1477 | if (ret <= 0) | |
1478 | return ret; | |
1479 | con->in_msg_pos.data_pos += ret; | |
1480 | con->in_msg_pos.page_pos += ret; | |
1481 | if (con->in_msg_pos.page_pos == bv->bv_len) { | |
1482 | con->in_msg_pos.page_pos = 0; | |
1483 | iter_bio_next(bio_iter, bio_seg); | |
1484 | } | |
1485 | ||
1486 | return ret; | |
1487 | } | |
1488 | #endif | |
1489 | ||
31b8006e SW |
1490 | /* |
1491 | * read (part of) a message. | |
1492 | */ | |
1493 | static int read_partial_message(struct ceph_connection *con) | |
1494 | { | |
1495 | struct ceph_msg *m = con->in_msg; | |
31b8006e | 1496 | int ret; |
9d7f0f13 | 1497 | int to, left; |
c5c6b19d | 1498 | unsigned front_len, middle_len, data_len; |
31b8006e | 1499 | int datacrc = con->msgr->nocrc; |
2450418c | 1500 | int skip; |
ae18756b | 1501 | u64 seq; |
31b8006e SW |
1502 | |
1503 | dout("read_partial_message con %p msg %p\n", con, m); | |
1504 | ||
1505 | /* header */ | |
1506 | while (con->in_base_pos < sizeof(con->in_hdr)) { | |
1507 | left = sizeof(con->in_hdr) - con->in_base_pos; | |
1508 | ret = ceph_tcp_recvmsg(con->sock, | |
1509 | (char *)&con->in_hdr + con->in_base_pos, | |
1510 | left); | |
1511 | if (ret <= 0) | |
1512 | return ret; | |
1513 | con->in_base_pos += ret; | |
1514 | if (con->in_base_pos == sizeof(con->in_hdr)) { | |
1515 | u32 crc = crc32c(0, (void *)&con->in_hdr, | |
1516 | sizeof(con->in_hdr) - sizeof(con->in_hdr.crc)); | |
1517 | if (crc != le32_to_cpu(con->in_hdr.crc)) { | |
1518 | pr_err("read_partial_message bad hdr " | |
1519 | " crc %u != expected %u\n", | |
1520 | crc, con->in_hdr.crc); | |
1521 | return -EBADMSG; | |
1522 | } | |
1523 | } | |
1524 | } | |
31b8006e SW |
1525 | front_len = le32_to_cpu(con->in_hdr.front_len); |
1526 | if (front_len > CEPH_MSG_MAX_FRONT_LEN) | |
1527 | return -EIO; | |
1528 | middle_len = le32_to_cpu(con->in_hdr.middle_len); | |
1529 | if (middle_len > CEPH_MSG_MAX_DATA_LEN) | |
1530 | return -EIO; | |
1531 | data_len = le32_to_cpu(con->in_hdr.data_len); | |
1532 | if (data_len > CEPH_MSG_MAX_DATA_LEN) | |
1533 | return -EIO; | |
1534 | ||
ae18756b SW |
1535 | /* verify seq# */ |
1536 | seq = le64_to_cpu(con->in_hdr.seq); | |
1537 | if ((s64)seq - (s64)con->in_seq < 1) { | |
df9f86fa | 1538 | pr_info("skipping %s%lld %s seq %lld expected %lld\n", |
ae18756b | 1539 | ENTITY_NAME(con->peer_name), |
3d14c5d2 | 1540 | ceph_pr_addr(&con->peer_addr.in_addr), |
ae18756b SW |
1541 | seq, con->in_seq + 1); |
1542 | con->in_base_pos = -front_len - middle_len - data_len - | |
1543 | sizeof(m->footer); | |
1544 | con->in_tag = CEPH_MSGR_TAG_READY; | |
ae18756b SW |
1545 | return 0; |
1546 | } else if ((s64)seq - (s64)con->in_seq > 1) { | |
1547 | pr_err("read_partial_message bad seq %lld expected %lld\n", | |
1548 | seq, con->in_seq + 1); | |
1549 | con->error_msg = "bad message sequence # for incoming message"; | |
1550 | return -EBADMSG; | |
1551 | } | |
1552 | ||
31b8006e SW |
1553 | /* allocate message? */ |
1554 | if (!con->in_msg) { | |
1555 | dout("got hdr type %d front %d data %d\n", con->in_hdr.type, | |
1556 | con->in_hdr.front_len, con->in_hdr.data_len); | |
ae32be31 | 1557 | skip = 0; |
2450418c YS |
1558 | con->in_msg = ceph_alloc_msg(con, &con->in_hdr, &skip); |
1559 | if (skip) { | |
31b8006e | 1560 | /* skip this message */ |
a79832f2 | 1561 | dout("alloc_msg said skip message\n"); |
ae32be31 | 1562 | BUG_ON(con->in_msg); |
31b8006e SW |
1563 | con->in_base_pos = -front_len - middle_len - data_len - |
1564 | sizeof(m->footer); | |
1565 | con->in_tag = CEPH_MSGR_TAG_READY; | |
684be25c | 1566 | con->in_seq++; |
31b8006e SW |
1567 | return 0; |
1568 | } | |
a79832f2 | 1569 | if (!con->in_msg) { |
5b3a4db3 SW |
1570 | con->error_msg = |
1571 | "error allocating memory for incoming message"; | |
a79832f2 | 1572 | return -ENOMEM; |
31b8006e SW |
1573 | } |
1574 | m = con->in_msg; | |
1575 | m->front.iov_len = 0; /* haven't read it yet */ | |
2450418c YS |
1576 | if (m->middle) |
1577 | m->middle->vec.iov_len = 0; | |
9d7f0f13 YS |
1578 | |
1579 | con->in_msg_pos.page = 0; | |
68b4476b | 1580 | if (m->pages) |
c5c6b19d | 1581 | con->in_msg_pos.page_pos = m->page_alignment; |
68b4476b YS |
1582 | else |
1583 | con->in_msg_pos.page_pos = 0; | |
9d7f0f13 | 1584 | con->in_msg_pos.data_pos = 0; |
31b8006e SW |
1585 | } |
1586 | ||
1587 | /* front */ | |
2450418c YS |
1588 | ret = read_partial_message_section(con, &m->front, front_len, |
1589 | &con->in_front_crc); | |
1590 | if (ret <= 0) | |
1591 | return ret; | |
31b8006e SW |
1592 | |
1593 | /* middle */ | |
2450418c | 1594 | if (m->middle) { |
213c99ee SW |
1595 | ret = read_partial_message_section(con, &m->middle->vec, |
1596 | middle_len, | |
2450418c | 1597 | &con->in_middle_crc); |
31b8006e SW |
1598 | if (ret <= 0) |
1599 | return ret; | |
31b8006e | 1600 | } |
68b4476b YS |
1601 | #ifdef CONFIG_BLOCK |
1602 | if (m->bio && !m->bio_iter) | |
1603 | init_bio_iter(m->bio, &m->bio_iter, &m->bio_seg); | |
1604 | #endif | |
31b8006e SW |
1605 | |
1606 | /* (page) data */ | |
31b8006e | 1607 | while (con->in_msg_pos.data_pos < data_len) { |
68b4476b YS |
1608 | if (m->pages) { |
1609 | ret = read_partial_message_pages(con, m->pages, | |
1610 | data_len, datacrc); | |
1611 | if (ret <= 0) | |
1612 | return ret; | |
1613 | #ifdef CONFIG_BLOCK | |
1614 | } else if (m->bio) { | |
1615 | ||
1616 | ret = read_partial_message_bio(con, | |
1617 | &m->bio_iter, &m->bio_seg, | |
1618 | data_len, datacrc); | |
1619 | if (ret <= 0) | |
1620 | return ret; | |
1621 | #endif | |
1622 | } else { | |
1623 | BUG_ON(1); | |
31b8006e SW |
1624 | } |
1625 | } | |
1626 | ||
31b8006e SW |
1627 | /* footer */ |
1628 | to = sizeof(m->hdr) + sizeof(m->footer); | |
1629 | while (con->in_base_pos < to) { | |
1630 | left = to - con->in_base_pos; | |
1631 | ret = ceph_tcp_recvmsg(con->sock, (char *)&m->footer + | |
1632 | (con->in_base_pos - sizeof(m->hdr)), | |
1633 | left); | |
1634 | if (ret <= 0) | |
1635 | return ret; | |
1636 | con->in_base_pos += ret; | |
1637 | } | |
1638 | dout("read_partial_message got msg %p %d (%u) + %d (%u) + %d (%u)\n", | |
1639 | m, front_len, m->footer.front_crc, middle_len, | |
1640 | m->footer.middle_crc, data_len, m->footer.data_crc); | |
1641 | ||
1642 | /* crc ok? */ | |
1643 | if (con->in_front_crc != le32_to_cpu(m->footer.front_crc)) { | |
1644 | pr_err("read_partial_message %p front crc %u != exp. %u\n", | |
1645 | m, con->in_front_crc, m->footer.front_crc); | |
1646 | return -EBADMSG; | |
1647 | } | |
1648 | if (con->in_middle_crc != le32_to_cpu(m->footer.middle_crc)) { | |
1649 | pr_err("read_partial_message %p middle crc %u != exp %u\n", | |
1650 | m, con->in_middle_crc, m->footer.middle_crc); | |
1651 | return -EBADMSG; | |
1652 | } | |
1653 | if (datacrc && | |
1654 | (m->footer.flags & CEPH_MSG_FOOTER_NOCRC) == 0 && | |
1655 | con->in_data_crc != le32_to_cpu(m->footer.data_crc)) { | |
1656 | pr_err("read_partial_message %p data crc %u != exp. %u\n", m, | |
1657 | con->in_data_crc, le32_to_cpu(m->footer.data_crc)); | |
1658 | return -EBADMSG; | |
1659 | } | |
1660 | ||
1661 | return 1; /* done! */ | |
1662 | } | |
1663 | ||
1664 | /* | |
1665 | * Process message. This happens in the worker thread. The callback should | |
1666 | * be careful not to do anything that waits on other incoming messages or it | |
1667 | * may deadlock. | |
1668 | */ | |
1669 | static void process_message(struct ceph_connection *con) | |
1670 | { | |
5e095e8b | 1671 | struct ceph_msg *msg; |
31b8006e | 1672 | |
5e095e8b | 1673 | msg = con->in_msg; |
31b8006e SW |
1674 | con->in_msg = NULL; |
1675 | ||
1676 | /* if first message, set peer_name */ | |
1677 | if (con->peer_name.type == 0) | |
dbad185d | 1678 | con->peer_name = msg->hdr.src; |
31b8006e | 1679 | |
31b8006e | 1680 | con->in_seq++; |
ec302645 | 1681 | mutex_unlock(&con->mutex); |
31b8006e SW |
1682 | |
1683 | dout("===== %p %llu from %s%lld %d=%s len %d+%d (%u %u %u) =====\n", | |
1684 | msg, le64_to_cpu(msg->hdr.seq), | |
dbad185d | 1685 | ENTITY_NAME(msg->hdr.src), |
31b8006e SW |
1686 | le16_to_cpu(msg->hdr.type), |
1687 | ceph_msg_type_name(le16_to_cpu(msg->hdr.type)), | |
1688 | le32_to_cpu(msg->hdr.front_len), | |
1689 | le32_to_cpu(msg->hdr.data_len), | |
1690 | con->in_front_crc, con->in_middle_crc, con->in_data_crc); | |
1691 | con->ops->dispatch(con, msg); | |
ec302645 SW |
1692 | |
1693 | mutex_lock(&con->mutex); | |
31b8006e SW |
1694 | prepare_read_tag(con); |
1695 | } | |
1696 | ||
1697 | ||
1698 | /* | |
1699 | * Write something to the socket. Called in a worker thread when the | |
1700 | * socket appears to be writeable and we have something ready to send. | |
1701 | */ | |
1702 | static int try_write(struct ceph_connection *con) | |
1703 | { | |
1704 | struct ceph_messenger *msgr = con->msgr; | |
1705 | int ret = 1; | |
1706 | ||
1707 | dout("try_write start %p state %lu nref %d\n", con, con->state, | |
1708 | atomic_read(&con->nref)); | |
1709 | ||
31b8006e SW |
1710 | more: |
1711 | dout("try_write out_kvec_bytes %d\n", con->out_kvec_bytes); | |
1712 | ||
1713 | /* open the socket first? */ | |
1714 | if (con->sock == NULL) { | |
1715 | /* | |
1716 | * if we were STANDBY and are reconnecting _this_ | |
1717 | * connection, bump connect_seq now. Always bump | |
1718 | * global_seq. | |
1719 | */ | |
1720 | if (test_and_clear_bit(STANDBY, &con->state)) | |
1721 | con->connect_seq++; | |
1722 | ||
eed0ef2c SW |
1723 | prepare_write_banner(msgr, con); |
1724 | prepare_write_connect(msgr, con, 1); | |
1725 | prepare_read_banner(con); | |
31b8006e | 1726 | set_bit(CONNECTING, &con->state); |
eed0ef2c | 1727 | clear_bit(NEGOTIATING, &con->state); |
31b8006e | 1728 | |
cf3e5c40 | 1729 | BUG_ON(con->in_msg); |
31b8006e SW |
1730 | con->in_tag = CEPH_MSGR_TAG_READY; |
1731 | dout("try_write initiating connect on %p new state %lu\n", | |
1732 | con, con->state); | |
1733 | con->sock = ceph_tcp_connect(con); | |
1734 | if (IS_ERR(con->sock)) { | |
1735 | con->sock = NULL; | |
1736 | con->error_msg = "connect error"; | |
1737 | ret = -1; | |
1738 | goto out; | |
1739 | } | |
1740 | } | |
1741 | ||
1742 | more_kvec: | |
1743 | /* kvec data queued? */ | |
1744 | if (con->out_skip) { | |
1745 | ret = write_partial_skip(con); | |
1746 | if (ret <= 0) | |
42961d23 | 1747 | goto out; |
31b8006e SW |
1748 | } |
1749 | if (con->out_kvec_left) { | |
1750 | ret = write_partial_kvec(con); | |
1751 | if (ret <= 0) | |
42961d23 | 1752 | goto out; |
31b8006e SW |
1753 | } |
1754 | ||
1755 | /* msg pages? */ | |
1756 | if (con->out_msg) { | |
c86a2930 SW |
1757 | if (con->out_msg_done) { |
1758 | ceph_msg_put(con->out_msg); | |
1759 | con->out_msg = NULL; /* we're done with this one */ | |
1760 | goto do_next; | |
1761 | } | |
1762 | ||
31b8006e SW |
1763 | ret = write_partial_msg_pages(con); |
1764 | if (ret == 1) | |
1765 | goto more_kvec; /* we need to send the footer, too! */ | |
1766 | if (ret == 0) | |
42961d23 | 1767 | goto out; |
31b8006e SW |
1768 | if (ret < 0) { |
1769 | dout("try_write write_partial_msg_pages err %d\n", | |
1770 | ret); | |
42961d23 | 1771 | goto out; |
31b8006e SW |
1772 | } |
1773 | } | |
1774 | ||
c86a2930 | 1775 | do_next: |
31b8006e SW |
1776 | if (!test_bit(CONNECTING, &con->state)) { |
1777 | /* is anything else pending? */ | |
1778 | if (!list_empty(&con->out_queue)) { | |
1779 | prepare_write_message(con); | |
1780 | goto more; | |
1781 | } | |
1782 | if (con->in_seq > con->in_seq_acked) { | |
1783 | prepare_write_ack(con); | |
1784 | goto more; | |
1785 | } | |
1786 | if (test_and_clear_bit(KEEPALIVE_PENDING, &con->state)) { | |
1787 | prepare_write_keepalive(con); | |
1788 | goto more; | |
1789 | } | |
1790 | } | |
1791 | ||
1792 | /* Nothing to do! */ | |
1793 | clear_bit(WRITE_PENDING, &con->state); | |
1794 | dout("try_write nothing else to write.\n"); | |
31b8006e SW |
1795 | ret = 0; |
1796 | out: | |
42961d23 | 1797 | dout("try_write done on %p ret %d\n", con, ret); |
31b8006e SW |
1798 | return ret; |
1799 | } | |
1800 | ||
1801 | ||
1802 | ||
1803 | /* | |
1804 | * Read what we can from the socket. | |
1805 | */ | |
1806 | static int try_read(struct ceph_connection *con) | |
1807 | { | |
31b8006e SW |
1808 | int ret = -1; |
1809 | ||
1810 | if (!con->sock) | |
1811 | return 0; | |
1812 | ||
1813 | if (test_bit(STANDBY, &con->state)) | |
1814 | return 0; | |
1815 | ||
1816 | dout("try_read start on %p\n", con); | |
ec302645 | 1817 | |
31b8006e SW |
1818 | more: |
1819 | dout("try_read tag %d in_base_pos %d\n", (int)con->in_tag, | |
1820 | con->in_base_pos); | |
1821 | if (test_bit(CONNECTING, &con->state)) { | |
eed0ef2c SW |
1822 | if (!test_bit(NEGOTIATING, &con->state)) { |
1823 | dout("try_read connecting\n"); | |
1824 | ret = read_partial_banner(con); | |
1825 | if (ret <= 0) | |
eed0ef2c | 1826 | goto out; |
98bdb0aa SW |
1827 | ret = process_banner(con); |
1828 | if (ret < 0) | |
1829 | goto out; | |
eed0ef2c | 1830 | } |
31b8006e SW |
1831 | ret = read_partial_connect(con); |
1832 | if (ret <= 0) | |
31b8006e | 1833 | goto out; |
98bdb0aa SW |
1834 | ret = process_connect(con); |
1835 | if (ret < 0) | |
1836 | goto out; | |
31b8006e SW |
1837 | goto more; |
1838 | } | |
1839 | ||
1840 | if (con->in_base_pos < 0) { | |
1841 | /* | |
1842 | * skipping + discarding content. | |
1843 | * | |
1844 | * FIXME: there must be a better way to do this! | |
1845 | */ | |
1846 | static char buf[1024]; | |
1847 | int skip = min(1024, -con->in_base_pos); | |
1848 | dout("skipping %d / %d bytes\n", skip, -con->in_base_pos); | |
1849 | ret = ceph_tcp_recvmsg(con->sock, buf, skip); | |
1850 | if (ret <= 0) | |
98bdb0aa | 1851 | goto out; |
31b8006e SW |
1852 | con->in_base_pos += ret; |
1853 | if (con->in_base_pos) | |
1854 | goto more; | |
1855 | } | |
1856 | if (con->in_tag == CEPH_MSGR_TAG_READY) { | |
1857 | /* | |
1858 | * what's next? | |
1859 | */ | |
1860 | ret = ceph_tcp_recvmsg(con->sock, &con->in_tag, 1); | |
1861 | if (ret <= 0) | |
98bdb0aa | 1862 | goto out; |
31b8006e SW |
1863 | dout("try_read got tag %d\n", (int)con->in_tag); |
1864 | switch (con->in_tag) { | |
1865 | case CEPH_MSGR_TAG_MSG: | |
1866 | prepare_read_message(con); | |
1867 | break; | |
1868 | case CEPH_MSGR_TAG_ACK: | |
1869 | prepare_read_ack(con); | |
1870 | break; | |
1871 | case CEPH_MSGR_TAG_CLOSE: | |
1872 | set_bit(CLOSED, &con->state); /* fixme */ | |
98bdb0aa | 1873 | goto out; |
31b8006e SW |
1874 | default: |
1875 | goto bad_tag; | |
1876 | } | |
1877 | } | |
1878 | if (con->in_tag == CEPH_MSGR_TAG_MSG) { | |
1879 | ret = read_partial_message(con); | |
1880 | if (ret <= 0) { | |
1881 | switch (ret) { | |
1882 | case -EBADMSG: | |
1883 | con->error_msg = "bad crc"; | |
1884 | ret = -EIO; | |
98bdb0aa | 1885 | break; |
31b8006e SW |
1886 | case -EIO: |
1887 | con->error_msg = "io error"; | |
98bdb0aa | 1888 | break; |
31b8006e | 1889 | } |
98bdb0aa | 1890 | goto out; |
31b8006e SW |
1891 | } |
1892 | if (con->in_tag == CEPH_MSGR_TAG_READY) | |
1893 | goto more; | |
1894 | process_message(con); | |
1895 | goto more; | |
1896 | } | |
1897 | if (con->in_tag == CEPH_MSGR_TAG_ACK) { | |
1898 | ret = read_partial_ack(con); | |
1899 | if (ret <= 0) | |
98bdb0aa | 1900 | goto out; |
31b8006e SW |
1901 | process_ack(con); |
1902 | goto more; | |
1903 | } | |
1904 | ||
31b8006e | 1905 | out: |
98bdb0aa | 1906 | dout("try_read done on %p ret %d\n", con, ret); |
31b8006e SW |
1907 | return ret; |
1908 | ||
1909 | bad_tag: | |
1910 | pr_err("try_read bad con->in_tag = %d\n", (int)con->in_tag); | |
1911 | con->error_msg = "protocol error, garbage tag"; | |
1912 | ret = -1; | |
1913 | goto out; | |
1914 | } | |
1915 | ||
1916 | ||
1917 | /* | |
1918 | * Atomically queue work on a connection. Bump @con reference to | |
1919 | * avoid races with connection teardown. | |
31b8006e SW |
1920 | */ |
1921 | static void queue_con(struct ceph_connection *con) | |
1922 | { | |
1923 | if (test_bit(DEAD, &con->state)) { | |
1924 | dout("queue_con %p ignoring: DEAD\n", | |
1925 | con); | |
1926 | return; | |
1927 | } | |
1928 | ||
1929 | if (!con->ops->get(con)) { | |
1930 | dout("queue_con %p ref count 0\n", con); | |
1931 | return; | |
1932 | } | |
1933 | ||
f363e45f | 1934 | if (!queue_delayed_work(ceph_msgr_wq, &con->work, 0)) { |
31b8006e SW |
1935 | dout("queue_con %p - already queued\n", con); |
1936 | con->ops->put(con); | |
1937 | } else { | |
1938 | dout("queue_con %p\n", con); | |
1939 | } | |
1940 | } | |
1941 | ||
1942 | /* | |
1943 | * Do some work on a connection. Drop a connection ref when we're done. | |
1944 | */ | |
1945 | static void con_work(struct work_struct *work) | |
1946 | { | |
1947 | struct ceph_connection *con = container_of(work, struct ceph_connection, | |
1948 | work.work); | |
31b8006e | 1949 | |
9dd4658d | 1950 | mutex_lock(&con->mutex); |
60bf8bf8 SW |
1951 | if (test_and_clear_bit(BACKOFF, &con->state)) { |
1952 | dout("con_work %p backing off\n", con); | |
1953 | if (queue_delayed_work(ceph_msgr_wq, &con->work, | |
1954 | round_jiffies_relative(con->delay))) { | |
1955 | dout("con_work %p backoff %lu\n", con, con->delay); | |
1956 | mutex_unlock(&con->mutex); | |
1957 | return; | |
1958 | } else { | |
1959 | con->ops->put(con); | |
1960 | dout("con_work %p FAILED to back off %lu\n", con, | |
1961 | con->delay); | |
1962 | } | |
1963 | } | |
9dd4658d | 1964 | |
31b8006e SW |
1965 | if (test_bit(CLOSED, &con->state)) { /* e.g. if we are replaced */ |
1966 | dout("con_work CLOSED\n"); | |
1967 | con_close_socket(con); | |
1968 | goto done; | |
1969 | } | |
1970 | if (test_and_clear_bit(OPENING, &con->state)) { | |
1971 | /* reopen w/ new peer */ | |
1972 | dout("con_work OPENING\n"); | |
1973 | con_close_socket(con); | |
1974 | } | |
1975 | ||
1976 | if (test_and_clear_bit(SOCK_CLOSED, &con->state) || | |
1977 | try_read(con) < 0 || | |
1978 | try_write(con) < 0) { | |
9dd4658d | 1979 | mutex_unlock(&con->mutex); |
31b8006e | 1980 | ceph_fault(con); /* error/fault path */ |
9dd4658d | 1981 | goto done_unlocked; |
31b8006e SW |
1982 | } |
1983 | ||
1984 | done: | |
9dd4658d | 1985 | mutex_unlock(&con->mutex); |
9dd4658d | 1986 | done_unlocked: |
31b8006e SW |
1987 | con->ops->put(con); |
1988 | } | |
1989 | ||
1990 | ||
1991 | /* | |
1992 | * Generic error/fault handler. A retry mechanism is used with | |
1993 | * exponential backoff | |
1994 | */ | |
1995 | static void ceph_fault(struct ceph_connection *con) | |
1996 | { | |
1997 | pr_err("%s%lld %s %s\n", ENTITY_NAME(con->peer_name), | |
3d14c5d2 | 1998 | ceph_pr_addr(&con->peer_addr.in_addr), con->error_msg); |
31b8006e | 1999 | dout("fault %p state %lu to peer %s\n", |
3d14c5d2 | 2000 | con, con->state, ceph_pr_addr(&con->peer_addr.in_addr)); |
31b8006e SW |
2001 | |
2002 | if (test_bit(LOSSYTX, &con->state)) { | |
2003 | dout("fault on LOSSYTX channel\n"); | |
2004 | goto out; | |
2005 | } | |
2006 | ||
ec302645 | 2007 | mutex_lock(&con->mutex); |
91e45ce3 SW |
2008 | if (test_bit(CLOSED, &con->state)) |
2009 | goto out_unlock; | |
ec302645 | 2010 | |
31b8006e | 2011 | con_close_socket(con); |
5e095e8b SW |
2012 | |
2013 | if (con->in_msg) { | |
2014 | ceph_msg_put(con->in_msg); | |
2015 | con->in_msg = NULL; | |
2016 | } | |
31b8006e | 2017 | |
e80a52d1 SW |
2018 | /* Requeue anything that hasn't been acked */ |
2019 | list_splice_init(&con->out_sent, &con->out_queue); | |
9bd2e6f8 | 2020 | |
e76661d0 SW |
2021 | /* If there are no messages queued or keepalive pending, place |
2022 | * the connection in a STANDBY state */ | |
2023 | if (list_empty(&con->out_queue) && | |
2024 | !test_bit(KEEPALIVE_PENDING, &con->state)) { | |
31b8006e | 2025 | set_bit(STANDBY, &con->state); |
e80a52d1 SW |
2026 | } else { |
2027 | /* retry after a delay. */ | |
2028 | if (con->delay == 0) | |
2029 | con->delay = BASE_DELAY_INTERVAL; | |
2030 | else if (con->delay < MAX_DELAY_INTERVAL) | |
2031 | con->delay *= 2; | |
e80a52d1 SW |
2032 | con->ops->get(con); |
2033 | if (queue_delayed_work(ceph_msgr_wq, &con->work, | |
60bf8bf8 SW |
2034 | round_jiffies_relative(con->delay))) { |
2035 | dout("fault queued %p delay %lu\n", con, con->delay); | |
2036 | } else { | |
e80a52d1 | 2037 | con->ops->put(con); |
60bf8bf8 SW |
2038 | dout("fault failed to queue %p delay %lu, backoff\n", |
2039 | con, con->delay); | |
2040 | /* | |
2041 | * In many cases we see a socket state change | |
2042 | * while con_work is running and end up | |
2043 | * queuing (non-delayed) work, such that we | |
2044 | * can't backoff with a delay. Set a flag so | |
2045 | * that when con_work restarts we schedule the | |
2046 | * delay then. | |
2047 | */ | |
2048 | set_bit(BACKOFF, &con->state); | |
2049 | } | |
31b8006e SW |
2050 | } |
2051 | ||
91e45ce3 SW |
2052 | out_unlock: |
2053 | mutex_unlock(&con->mutex); | |
31b8006e | 2054 | out: |
161fd65a SW |
2055 | /* |
2056 | * in case we faulted due to authentication, invalidate our | |
2057 | * current tickets so that we can get new ones. | |
213c99ee | 2058 | */ |
161fd65a SW |
2059 | if (con->auth_retry && con->ops->invalidate_authorizer) { |
2060 | dout("calling invalidate_authorizer()\n"); | |
2061 | con->ops->invalidate_authorizer(con); | |
2062 | } | |
2063 | ||
31b8006e SW |
2064 | if (con->ops->fault) |
2065 | con->ops->fault(con); | |
2066 | } | |
2067 | ||
2068 | ||
2069 | ||
2070 | /* | |
2071 | * create a new messenger instance | |
2072 | */ | |
3d14c5d2 YS |
2073 | struct ceph_messenger *ceph_messenger_create(struct ceph_entity_addr *myaddr, |
2074 | u32 supported_features, | |
2075 | u32 required_features) | |
31b8006e SW |
2076 | { |
2077 | struct ceph_messenger *msgr; | |
2078 | ||
2079 | msgr = kzalloc(sizeof(*msgr), GFP_KERNEL); | |
2080 | if (msgr == NULL) | |
2081 | return ERR_PTR(-ENOMEM); | |
2082 | ||
3d14c5d2 YS |
2083 | msgr->supported_features = supported_features; |
2084 | msgr->required_features = required_features; | |
2085 | ||
31b8006e SW |
2086 | spin_lock_init(&msgr->global_seq_lock); |
2087 | ||
2088 | /* the zero page is needed if a request is "canceled" while the message | |
2089 | * is being written over the socket */ | |
31459fe4 | 2090 | msgr->zero_page = __page_cache_alloc(GFP_KERNEL | __GFP_ZERO); |
31b8006e SW |
2091 | if (!msgr->zero_page) { |
2092 | kfree(msgr); | |
2093 | return ERR_PTR(-ENOMEM); | |
2094 | } | |
2095 | kmap(msgr->zero_page); | |
2096 | ||
2097 | if (myaddr) | |
2098 | msgr->inst.addr = *myaddr; | |
2099 | ||
2100 | /* select a random nonce */ | |
ac8839d7 | 2101 | msgr->inst.addr.type = 0; |
103e2d3a | 2102 | get_random_bytes(&msgr->inst.addr.nonce, sizeof(msgr->inst.addr.nonce)); |
63f2d211 | 2103 | encode_my_addr(msgr); |
31b8006e SW |
2104 | |
2105 | dout("messenger_create %p\n", msgr); | |
2106 | return msgr; | |
2107 | } | |
3d14c5d2 | 2108 | EXPORT_SYMBOL(ceph_messenger_create); |
31b8006e SW |
2109 | |
2110 | void ceph_messenger_destroy(struct ceph_messenger *msgr) | |
2111 | { | |
2112 | dout("destroy %p\n", msgr); | |
2113 | kunmap(msgr->zero_page); | |
2114 | __free_page(msgr->zero_page); | |
2115 | kfree(msgr); | |
2116 | dout("destroyed messenger %p\n", msgr); | |
2117 | } | |
3d14c5d2 | 2118 | EXPORT_SYMBOL(ceph_messenger_destroy); |
31b8006e SW |
2119 | |
2120 | /* | |
2121 | * Queue up an outgoing message on the given connection. | |
2122 | */ | |
2123 | void ceph_con_send(struct ceph_connection *con, struct ceph_msg *msg) | |
2124 | { | |
2125 | if (test_bit(CLOSED, &con->state)) { | |
2126 | dout("con_send %p closed, dropping %p\n", con, msg); | |
2127 | ceph_msg_put(msg); | |
2128 | return; | |
2129 | } | |
2130 | ||
2131 | /* set src+dst */ | |
dbad185d | 2132 | msg->hdr.src = con->msgr->inst.name; |
31b8006e | 2133 | |
3ca02ef9 SW |
2134 | BUG_ON(msg->front.iov_len != le32_to_cpu(msg->hdr.front_len)); |
2135 | ||
e84346b7 SW |
2136 | msg->needs_out_seq = true; |
2137 | ||
31b8006e | 2138 | /* queue */ |
ec302645 | 2139 | mutex_lock(&con->mutex); |
31b8006e SW |
2140 | BUG_ON(!list_empty(&msg->list_head)); |
2141 | list_add_tail(&msg->list_head, &con->out_queue); | |
2142 | dout("----- %p to %s%lld %d=%s len %d+%d+%d -----\n", msg, | |
2143 | ENTITY_NAME(con->peer_name), le16_to_cpu(msg->hdr.type), | |
2144 | ceph_msg_type_name(le16_to_cpu(msg->hdr.type)), | |
2145 | le32_to_cpu(msg->hdr.front_len), | |
2146 | le32_to_cpu(msg->hdr.middle_len), | |
2147 | le32_to_cpu(msg->hdr.data_len)); | |
ec302645 | 2148 | mutex_unlock(&con->mutex); |
31b8006e SW |
2149 | |
2150 | /* if there wasn't anything waiting to send before, queue | |
2151 | * new work */ | |
2152 | if (test_and_set_bit(WRITE_PENDING, &con->state) == 0) | |
2153 | queue_con(con); | |
2154 | } | |
3d14c5d2 | 2155 | EXPORT_SYMBOL(ceph_con_send); |
31b8006e SW |
2156 | |
2157 | /* | |
2158 | * Revoke a message that was previously queued for send | |
2159 | */ | |
2160 | void ceph_con_revoke(struct ceph_connection *con, struct ceph_msg *msg) | |
2161 | { | |
ec302645 | 2162 | mutex_lock(&con->mutex); |
31b8006e | 2163 | if (!list_empty(&msg->list_head)) { |
ed98adad | 2164 | dout("con_revoke %p msg %p - was on queue\n", con, msg); |
31b8006e SW |
2165 | list_del_init(&msg->list_head); |
2166 | ceph_msg_put(msg); | |
2167 | msg->hdr.seq = 0; | |
ed98adad SW |
2168 | } |
2169 | if (con->out_msg == msg) { | |
2170 | dout("con_revoke %p msg %p - was sending\n", con, msg); | |
2171 | con->out_msg = NULL; | |
31b8006e SW |
2172 | if (con->out_kvec_is_msg) { |
2173 | con->out_skip = con->out_kvec_bytes; | |
2174 | con->out_kvec_is_msg = false; | |
2175 | } | |
ed98adad SW |
2176 | ceph_msg_put(msg); |
2177 | msg->hdr.seq = 0; | |
31b8006e | 2178 | } |
ec302645 | 2179 | mutex_unlock(&con->mutex); |
31b8006e SW |
2180 | } |
2181 | ||
350b1c32 | 2182 | /* |
0d59ab81 | 2183 | * Revoke a message that we may be reading data into |
350b1c32 | 2184 | */ |
0d59ab81 | 2185 | void ceph_con_revoke_message(struct ceph_connection *con, struct ceph_msg *msg) |
350b1c32 SW |
2186 | { |
2187 | mutex_lock(&con->mutex); | |
0d59ab81 YS |
2188 | if (con->in_msg && con->in_msg == msg) { |
2189 | unsigned front_len = le32_to_cpu(con->in_hdr.front_len); | |
2190 | unsigned middle_len = le32_to_cpu(con->in_hdr.middle_len); | |
350b1c32 SW |
2191 | unsigned data_len = le32_to_cpu(con->in_hdr.data_len); |
2192 | ||
2193 | /* skip rest of message */ | |
0d59ab81 | 2194 | dout("con_revoke_pages %p msg %p revoked\n", con, msg); |
350b1c32 SW |
2195 | con->in_base_pos = con->in_base_pos - |
2196 | sizeof(struct ceph_msg_header) - | |
0d59ab81 YS |
2197 | front_len - |
2198 | middle_len - | |
2199 | data_len - | |
350b1c32 | 2200 | sizeof(struct ceph_msg_footer); |
350b1c32 SW |
2201 | ceph_msg_put(con->in_msg); |
2202 | con->in_msg = NULL; | |
2203 | con->in_tag = CEPH_MSGR_TAG_READY; | |
684be25c | 2204 | con->in_seq++; |
350b1c32 SW |
2205 | } else { |
2206 | dout("con_revoke_pages %p msg %p pages %p no-op\n", | |
0d59ab81 | 2207 | con, con->in_msg, msg); |
350b1c32 SW |
2208 | } |
2209 | mutex_unlock(&con->mutex); | |
2210 | } | |
2211 | ||
31b8006e SW |
2212 | /* |
2213 | * Queue a keepalive byte to ensure the tcp connection is alive. | |
2214 | */ | |
2215 | void ceph_con_keepalive(struct ceph_connection *con) | |
2216 | { | |
2217 | if (test_and_set_bit(KEEPALIVE_PENDING, &con->state) == 0 && | |
2218 | test_and_set_bit(WRITE_PENDING, &con->state) == 0) | |
2219 | queue_con(con); | |
2220 | } | |
3d14c5d2 | 2221 | EXPORT_SYMBOL(ceph_con_keepalive); |
31b8006e SW |
2222 | |
2223 | ||
2224 | /* | |
2225 | * construct a new message with given type, size | |
2226 | * the new msg has a ref count of 1. | |
2227 | */ | |
34d23762 | 2228 | struct ceph_msg *ceph_msg_new(int type, int front_len, gfp_t flags) |
31b8006e SW |
2229 | { |
2230 | struct ceph_msg *m; | |
2231 | ||
34d23762 | 2232 | m = kmalloc(sizeof(*m), flags); |
31b8006e SW |
2233 | if (m == NULL) |
2234 | goto out; | |
c2e552e7 | 2235 | kref_init(&m->kref); |
31b8006e SW |
2236 | INIT_LIST_HEAD(&m->list_head); |
2237 | ||
45c6ceb5 | 2238 | m->hdr.tid = 0; |
31b8006e | 2239 | m->hdr.type = cpu_to_le16(type); |
45c6ceb5 SW |
2240 | m->hdr.priority = cpu_to_le16(CEPH_MSG_PRIO_DEFAULT); |
2241 | m->hdr.version = 0; | |
31b8006e SW |
2242 | m->hdr.front_len = cpu_to_le32(front_len); |
2243 | m->hdr.middle_len = 0; | |
bb257664 SW |
2244 | m->hdr.data_len = 0; |
2245 | m->hdr.data_off = 0; | |
45c6ceb5 | 2246 | m->hdr.reserved = 0; |
31b8006e SW |
2247 | m->footer.front_crc = 0; |
2248 | m->footer.middle_crc = 0; | |
2249 | m->footer.data_crc = 0; | |
45c6ceb5 | 2250 | m->footer.flags = 0; |
31b8006e SW |
2251 | m->front_max = front_len; |
2252 | m->front_is_vmalloc = false; | |
2253 | m->more_to_follow = false; | |
2254 | m->pool = NULL; | |
2255 | ||
2256 | /* front */ | |
2257 | if (front_len) { | |
2258 | if (front_len > PAGE_CACHE_SIZE) { | |
34d23762 | 2259 | m->front.iov_base = __vmalloc(front_len, flags, |
31b8006e SW |
2260 | PAGE_KERNEL); |
2261 | m->front_is_vmalloc = true; | |
2262 | } else { | |
34d23762 | 2263 | m->front.iov_base = kmalloc(front_len, flags); |
31b8006e SW |
2264 | } |
2265 | if (m->front.iov_base == NULL) { | |
2266 | pr_err("msg_new can't allocate %d bytes\n", | |
2267 | front_len); | |
2268 | goto out2; | |
2269 | } | |
2270 | } else { | |
2271 | m->front.iov_base = NULL; | |
2272 | } | |
2273 | m->front.iov_len = front_len; | |
2274 | ||
2275 | /* middle */ | |
2276 | m->middle = NULL; | |
2277 | ||
2278 | /* data */ | |
bb257664 | 2279 | m->nr_pages = 0; |
c5c6b19d | 2280 | m->page_alignment = 0; |
bb257664 | 2281 | m->pages = NULL; |
58bb3b37 | 2282 | m->pagelist = NULL; |
68b4476b YS |
2283 | m->bio = NULL; |
2284 | m->bio_iter = NULL; | |
2285 | m->bio_seg = 0; | |
2286 | m->trail = NULL; | |
31b8006e | 2287 | |
bb257664 | 2288 | dout("ceph_msg_new %p front %d\n", m, front_len); |
31b8006e SW |
2289 | return m; |
2290 | ||
2291 | out2: | |
2292 | ceph_msg_put(m); | |
2293 | out: | |
bb257664 | 2294 | pr_err("msg_new can't create type %d front %d\n", type, front_len); |
a79832f2 | 2295 | return NULL; |
31b8006e | 2296 | } |
3d14c5d2 | 2297 | EXPORT_SYMBOL(ceph_msg_new); |
31b8006e | 2298 | |
31b8006e SW |
2299 | /* |
2300 | * Allocate "middle" portion of a message, if it is needed and wasn't | |
2301 | * allocated by alloc_msg. This allows us to read a small fixed-size | |
2302 | * per-type header in the front and then gracefully fail (i.e., | |
2303 | * propagate the error to the caller based on info in the front) when | |
2304 | * the middle is too large. | |
2305 | */ | |
2450418c | 2306 | static int ceph_alloc_middle(struct ceph_connection *con, struct ceph_msg *msg) |
31b8006e SW |
2307 | { |
2308 | int type = le16_to_cpu(msg->hdr.type); | |
2309 | int middle_len = le32_to_cpu(msg->hdr.middle_len); | |
2310 | ||
2311 | dout("alloc_middle %p type %d %s middle_len %d\n", msg, type, | |
2312 | ceph_msg_type_name(type), middle_len); | |
2313 | BUG_ON(!middle_len); | |
2314 | BUG_ON(msg->middle); | |
2315 | ||
b6c1d5b8 | 2316 | msg->middle = ceph_buffer_new(middle_len, GFP_NOFS); |
31b8006e SW |
2317 | if (!msg->middle) |
2318 | return -ENOMEM; | |
2319 | return 0; | |
2320 | } | |
2321 | ||
2450418c YS |
2322 | /* |
2323 | * Generic message allocator, for incoming messages. | |
2324 | */ | |
2325 | static struct ceph_msg *ceph_alloc_msg(struct ceph_connection *con, | |
2326 | struct ceph_msg_header *hdr, | |
2327 | int *skip) | |
2328 | { | |
2329 | int type = le16_to_cpu(hdr->type); | |
2330 | int front_len = le32_to_cpu(hdr->front_len); | |
2331 | int middle_len = le32_to_cpu(hdr->middle_len); | |
2332 | struct ceph_msg *msg = NULL; | |
2333 | int ret; | |
2334 | ||
2335 | if (con->ops->alloc_msg) { | |
0547a9b3 | 2336 | mutex_unlock(&con->mutex); |
2450418c | 2337 | msg = con->ops->alloc_msg(con, hdr, skip); |
0547a9b3 | 2338 | mutex_lock(&con->mutex); |
a79832f2 | 2339 | if (!msg || *skip) |
2450418c YS |
2340 | return NULL; |
2341 | } | |
2342 | if (!msg) { | |
2343 | *skip = 0; | |
34d23762 | 2344 | msg = ceph_msg_new(type, front_len, GFP_NOFS); |
2450418c YS |
2345 | if (!msg) { |
2346 | pr_err("unable to allocate msg type %d len %d\n", | |
2347 | type, front_len); | |
a79832f2 | 2348 | return NULL; |
2450418c | 2349 | } |
c5c6b19d | 2350 | msg->page_alignment = le16_to_cpu(hdr->data_off); |
2450418c | 2351 | } |
9d7f0f13 | 2352 | memcpy(&msg->hdr, &con->in_hdr, sizeof(con->in_hdr)); |
2450418c | 2353 | |
bb257664 | 2354 | if (middle_len && !msg->middle) { |
2450418c | 2355 | ret = ceph_alloc_middle(con, msg); |
2450418c YS |
2356 | if (ret < 0) { |
2357 | ceph_msg_put(msg); | |
a79832f2 | 2358 | return NULL; |
2450418c YS |
2359 | } |
2360 | } | |
9d7f0f13 | 2361 | |
2450418c YS |
2362 | return msg; |
2363 | } | |
2364 | ||
31b8006e SW |
2365 | |
2366 | /* | |
2367 | * Free a generically kmalloc'd message. | |
2368 | */ | |
2369 | void ceph_msg_kfree(struct ceph_msg *m) | |
2370 | { | |
2371 | dout("msg_kfree %p\n", m); | |
2372 | if (m->front_is_vmalloc) | |
2373 | vfree(m->front.iov_base); | |
2374 | else | |
2375 | kfree(m->front.iov_base); | |
2376 | kfree(m); | |
2377 | } | |
2378 | ||
2379 | /* | |
2380 | * Drop a msg ref. Destroy as needed. | |
2381 | */ | |
c2e552e7 SW |
2382 | void ceph_msg_last_put(struct kref *kref) |
2383 | { | |
2384 | struct ceph_msg *m = container_of(kref, struct ceph_msg, kref); | |
31b8006e | 2385 | |
c2e552e7 SW |
2386 | dout("ceph_msg_put last one on %p\n", m); |
2387 | WARN_ON(!list_empty(&m->list_head)); | |
2388 | ||
2389 | /* drop middle, data, if any */ | |
2390 | if (m->middle) { | |
2391 | ceph_buffer_put(m->middle); | |
2392 | m->middle = NULL; | |
31b8006e | 2393 | } |
c2e552e7 SW |
2394 | m->nr_pages = 0; |
2395 | m->pages = NULL; | |
2396 | ||
58bb3b37 SW |
2397 | if (m->pagelist) { |
2398 | ceph_pagelist_release(m->pagelist); | |
2399 | kfree(m->pagelist); | |
2400 | m->pagelist = NULL; | |
2401 | } | |
2402 | ||
68b4476b YS |
2403 | m->trail = NULL; |
2404 | ||
c2e552e7 SW |
2405 | if (m->pool) |
2406 | ceph_msgpool_put(m->pool, m); | |
2407 | else | |
2408 | ceph_msg_kfree(m); | |
31b8006e | 2409 | } |
3d14c5d2 | 2410 | EXPORT_SYMBOL(ceph_msg_last_put); |
9ec7cab1 SW |
2411 | |
2412 | void ceph_msg_dump(struct ceph_msg *msg) | |
2413 | { | |
2414 | pr_debug("msg_dump %p (front_max %d nr_pages %d)\n", msg, | |
2415 | msg->front_max, msg->nr_pages); | |
2416 | print_hex_dump(KERN_DEBUG, "header: ", | |
2417 | DUMP_PREFIX_OFFSET, 16, 1, | |
2418 | &msg->hdr, sizeof(msg->hdr), true); | |
2419 | print_hex_dump(KERN_DEBUG, " front: ", | |
2420 | DUMP_PREFIX_OFFSET, 16, 1, | |
2421 | msg->front.iov_base, msg->front.iov_len, true); | |
2422 | if (msg->middle) | |
2423 | print_hex_dump(KERN_DEBUG, "middle: ", | |
2424 | DUMP_PREFIX_OFFSET, 16, 1, | |
2425 | msg->middle->vec.iov_base, | |
2426 | msg->middle->vec.iov_len, true); | |
2427 | print_hex_dump(KERN_DEBUG, "footer: ", | |
2428 | DUMP_PREFIX_OFFSET, 16, 1, | |
2429 | &msg->footer, sizeof(msg->footer), true); | |
2430 | } | |
3d14c5d2 | 2431 | EXPORT_SYMBOL(ceph_msg_dump); |