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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> | |
ee3b56f2 | 14 | #include <linux/dns_resolver.h> |
31b8006e SW |
15 | #include <net/tcp.h> |
16 | ||
3d14c5d2 YS |
17 | #include <linux/ceph/libceph.h> |
18 | #include <linux/ceph/messenger.h> | |
19 | #include <linux/ceph/decode.h> | |
20 | #include <linux/ceph/pagelist.h> | |
bc3b2d7f | 21 | #include <linux/export.h> |
31b8006e SW |
22 | |
23 | /* | |
24 | * Ceph uses the messenger to exchange ceph_msg messages with other | |
25 | * hosts in the system. The messenger provides ordered and reliable | |
26 | * delivery. We tolerate TCP disconnects by reconnecting (with | |
27 | * exponential backoff) in the case of a fault (disconnection, bad | |
28 | * crc, protocol error). Acks allow sent messages to be discarded by | |
29 | * the sender. | |
30 | */ | |
31 | ||
32 | /* static tag bytes (protocol control messages) */ | |
33 | static char tag_msg = CEPH_MSGR_TAG_MSG; | |
34 | static char tag_ack = CEPH_MSGR_TAG_ACK; | |
35 | static char tag_keepalive = CEPH_MSGR_TAG_KEEPALIVE; | |
36 | ||
a6a5349d SW |
37 | #ifdef CONFIG_LOCKDEP |
38 | static struct lock_class_key socket_class; | |
39 | #endif | |
40 | ||
31b8006e SW |
41 | |
42 | static void queue_con(struct ceph_connection *con); | |
43 | static void con_work(struct work_struct *); | |
44 | static void ceph_fault(struct ceph_connection *con); | |
45 | ||
31b8006e | 46 | /* |
f64a9317 AE |
47 | * Nicely render a sockaddr as a string. An array of formatted |
48 | * strings is used, to approximate reentrancy. | |
31b8006e | 49 | */ |
f64a9317 AE |
50 | #define ADDR_STR_COUNT_LOG 5 /* log2(# address strings in array) */ |
51 | #define ADDR_STR_COUNT (1 << ADDR_STR_COUNT_LOG) | |
52 | #define ADDR_STR_COUNT_MASK (ADDR_STR_COUNT - 1) | |
53 | #define MAX_ADDR_STR_LEN 64 /* 54 is enough */ | |
54 | ||
55 | static char addr_str[ADDR_STR_COUNT][MAX_ADDR_STR_LEN]; | |
56 | static atomic_t addr_str_seq = ATOMIC_INIT(0); | |
31b8006e | 57 | |
57666519 AE |
58 | static struct page *zero_page; /* used in certain error cases */ |
59 | static void *zero_page_address; /* kernel virtual addr of zero_page */ | |
60 | ||
3d14c5d2 | 61 | const char *ceph_pr_addr(const struct sockaddr_storage *ss) |
31b8006e SW |
62 | { |
63 | int i; | |
64 | char *s; | |
65 | struct sockaddr_in *in4 = (void *)ss; | |
31b8006e SW |
66 | struct sockaddr_in6 *in6 = (void *)ss; |
67 | ||
f64a9317 | 68 | i = atomic_inc_return(&addr_str_seq) & ADDR_STR_COUNT_MASK; |
31b8006e SW |
69 | s = addr_str[i]; |
70 | ||
71 | switch (ss->ss_family) { | |
72 | case AF_INET: | |
d06dbaf6 SW |
73 | snprintf(s, MAX_ADDR_STR_LEN, "%pI4:%u", &in4->sin_addr, |
74 | (unsigned int)ntohs(in4->sin_port)); | |
31b8006e SW |
75 | break; |
76 | ||
77 | case AF_INET6: | |
d06dbaf6 SW |
78 | snprintf(s, MAX_ADDR_STR_LEN, "[%pI6c]:%u", &in6->sin6_addr, |
79 | (unsigned int)ntohs(in6->sin6_port)); | |
31b8006e SW |
80 | break; |
81 | ||
82 | default: | |
12a2f643 SW |
83 | snprintf(s, MAX_ADDR_STR_LEN, "(unknown sockaddr family %d)", |
84 | (int)ss->ss_family); | |
31b8006e SW |
85 | } |
86 | ||
87 | return s; | |
88 | } | |
3d14c5d2 | 89 | EXPORT_SYMBOL(ceph_pr_addr); |
31b8006e | 90 | |
63f2d211 SW |
91 | static void encode_my_addr(struct ceph_messenger *msgr) |
92 | { | |
93 | memcpy(&msgr->my_enc_addr, &msgr->inst.addr, sizeof(msgr->my_enc_addr)); | |
94 | ceph_encode_addr(&msgr->my_enc_addr); | |
95 | } | |
96 | ||
31b8006e SW |
97 | /* |
98 | * work queue for all reading and writing to/from the socket. | |
99 | */ | |
100 | struct workqueue_struct *ceph_msgr_wq; | |
101 | ||
3d14c5d2 | 102 | int ceph_msgr_init(void) |
31b8006e | 103 | { |
57666519 AE |
104 | BUG_ON(zero_page != NULL); |
105 | zero_page = ZERO_PAGE(0); | |
106 | page_cache_get(zero_page); | |
107 | ||
108 | BUG_ON(zero_page_address != NULL); | |
109 | zero_page_address = kmap(zero_page); | |
110 | ||
f363e45f | 111 | ceph_msgr_wq = alloc_workqueue("ceph-msgr", WQ_NON_REENTRANT, 0); |
d96c9043 SW |
112 | if (!ceph_msgr_wq) { |
113 | pr_err("msgr_init failed to create workqueue\n"); | |
57666519 AE |
114 | |
115 | zero_page_address = NULL; | |
116 | kunmap(zero_page); | |
117 | page_cache_release(zero_page); | |
118 | zero_page = NULL; | |
119 | ||
d96c9043 | 120 | return -ENOMEM; |
31b8006e | 121 | } |
57666519 | 122 | |
31b8006e SW |
123 | return 0; |
124 | } | |
3d14c5d2 | 125 | EXPORT_SYMBOL(ceph_msgr_init); |
31b8006e SW |
126 | |
127 | void ceph_msgr_exit(void) | |
128 | { | |
57666519 | 129 | BUG_ON(ceph_msgr_wq == NULL); |
31b8006e | 130 | destroy_workqueue(ceph_msgr_wq); |
57666519 AE |
131 | |
132 | BUG_ON(zero_page_address == NULL); | |
133 | zero_page_address = NULL; | |
134 | ||
135 | BUG_ON(zero_page == NULL); | |
136 | kunmap(zero_page); | |
137 | page_cache_release(zero_page); | |
138 | zero_page = NULL; | |
31b8006e | 139 | } |
3d14c5d2 | 140 | EXPORT_SYMBOL(ceph_msgr_exit); |
31b8006e | 141 | |
cd84db6e | 142 | void ceph_msgr_flush(void) |
a922d38f SW |
143 | { |
144 | flush_workqueue(ceph_msgr_wq); | |
145 | } | |
3d14c5d2 | 146 | EXPORT_SYMBOL(ceph_msgr_flush); |
a922d38f SW |
147 | |
148 | ||
31b8006e SW |
149 | /* |
150 | * socket callback functions | |
151 | */ | |
152 | ||
153 | /* data available on socket, or listen socket received a connect */ | |
154 | static void ceph_data_ready(struct sock *sk, int count_unused) | |
155 | { | |
156 | struct ceph_connection *con = | |
157 | (struct ceph_connection *)sk->sk_user_data; | |
158 | if (sk->sk_state != TCP_CLOSE_WAIT) { | |
159 | dout("ceph_data_ready on %p state = %lu, queueing work\n", | |
160 | con, con->state); | |
161 | queue_con(con); | |
162 | } | |
163 | } | |
164 | ||
165 | /* socket has buffer space for writing */ | |
166 | static void ceph_write_space(struct sock *sk) | |
167 | { | |
168 | struct ceph_connection *con = | |
169 | (struct ceph_connection *)sk->sk_user_data; | |
170 | ||
182fac26 JS |
171 | /* only queue to workqueue if there is data we want to write, |
172 | * and there is sufficient space in the socket buffer to accept | |
173 | * more data. clear SOCK_NOSPACE so that ceph_write_space() | |
174 | * doesn't get called again until try_write() fills the socket | |
175 | * buffer. See net/ipv4/tcp_input.c:tcp_check_space() | |
176 | * and net/core/stream.c:sk_stream_write_space(). | |
177 | */ | |
31b8006e | 178 | if (test_bit(WRITE_PENDING, &con->state)) { |
182fac26 JS |
179 | if (sk_stream_wspace(sk) >= sk_stream_min_wspace(sk)) { |
180 | dout("ceph_write_space %p queueing write work\n", con); | |
181 | clear_bit(SOCK_NOSPACE, &sk->sk_socket->flags); | |
182 | queue_con(con); | |
183 | } | |
31b8006e SW |
184 | } else { |
185 | dout("ceph_write_space %p nothing to write\n", con); | |
186 | } | |
31b8006e SW |
187 | } |
188 | ||
189 | /* socket's state has changed */ | |
190 | static void ceph_state_change(struct sock *sk) | |
191 | { | |
192 | struct ceph_connection *con = | |
193 | (struct ceph_connection *)sk->sk_user_data; | |
194 | ||
195 | dout("ceph_state_change %p state = %lu sk_state = %u\n", | |
196 | con, con->state, sk->sk_state); | |
197 | ||
198 | if (test_bit(CLOSED, &con->state)) | |
199 | return; | |
200 | ||
201 | switch (sk->sk_state) { | |
202 | case TCP_CLOSE: | |
203 | dout("ceph_state_change TCP_CLOSE\n"); | |
204 | case TCP_CLOSE_WAIT: | |
205 | dout("ceph_state_change TCP_CLOSE_WAIT\n"); | |
206 | if (test_and_set_bit(SOCK_CLOSED, &con->state) == 0) { | |
207 | if (test_bit(CONNECTING, &con->state)) | |
208 | con->error_msg = "connection failed"; | |
209 | else | |
210 | con->error_msg = "socket closed"; | |
211 | queue_con(con); | |
212 | } | |
213 | break; | |
214 | case TCP_ESTABLISHED: | |
215 | dout("ceph_state_change TCP_ESTABLISHED\n"); | |
216 | queue_con(con); | |
217 | break; | |
218 | } | |
219 | } | |
220 | ||
221 | /* | |
222 | * set up socket callbacks | |
223 | */ | |
224 | static void set_sock_callbacks(struct socket *sock, | |
225 | struct ceph_connection *con) | |
226 | { | |
227 | struct sock *sk = sock->sk; | |
228 | sk->sk_user_data = (void *)con; | |
229 | sk->sk_data_ready = ceph_data_ready; | |
230 | sk->sk_write_space = ceph_write_space; | |
231 | sk->sk_state_change = ceph_state_change; | |
232 | } | |
233 | ||
234 | ||
235 | /* | |
236 | * socket helpers | |
237 | */ | |
238 | ||
239 | /* | |
240 | * initiate connection to a remote socket. | |
241 | */ | |
242 | static struct socket *ceph_tcp_connect(struct ceph_connection *con) | |
243 | { | |
f91d3471 | 244 | struct sockaddr_storage *paddr = &con->peer_addr.in_addr; |
31b8006e SW |
245 | struct socket *sock; |
246 | int ret; | |
247 | ||
248 | BUG_ON(con->sock); | |
f91d3471 SW |
249 | ret = sock_create_kern(con->peer_addr.in_addr.ss_family, SOCK_STREAM, |
250 | IPPROTO_TCP, &sock); | |
31b8006e SW |
251 | if (ret) |
252 | return ERR_PTR(ret); | |
31b8006e SW |
253 | sock->sk->sk_allocation = GFP_NOFS; |
254 | ||
a6a5349d SW |
255 | #ifdef CONFIG_LOCKDEP |
256 | lockdep_set_class(&sock->sk->sk_lock, &socket_class); | |
257 | #endif | |
258 | ||
31b8006e SW |
259 | set_sock_callbacks(sock, con); |
260 | ||
3d14c5d2 | 261 | dout("connect %s\n", ceph_pr_addr(&con->peer_addr.in_addr)); |
31b8006e | 262 | |
f91d3471 SW |
263 | ret = sock->ops->connect(sock, (struct sockaddr *)paddr, sizeof(*paddr), |
264 | O_NONBLOCK); | |
31b8006e SW |
265 | if (ret == -EINPROGRESS) { |
266 | dout("connect %s EINPROGRESS sk_state = %u\n", | |
3d14c5d2 | 267 | ceph_pr_addr(&con->peer_addr.in_addr), |
31b8006e | 268 | sock->sk->sk_state); |
a5bc3129 | 269 | } else if (ret < 0) { |
31b8006e | 270 | pr_err("connect %s error %d\n", |
3d14c5d2 | 271 | ceph_pr_addr(&con->peer_addr.in_addr), ret); |
31b8006e | 272 | sock_release(sock); |
31b8006e | 273 | con->error_msg = "connect error"; |
31b8006e | 274 | |
31b8006e | 275 | return ERR_PTR(ret); |
a5bc3129 AE |
276 | } |
277 | con->sock = sock; | |
278 | ||
31b8006e SW |
279 | return sock; |
280 | } | |
281 | ||
282 | static int ceph_tcp_recvmsg(struct socket *sock, void *buf, size_t len) | |
283 | { | |
284 | struct kvec iov = {buf, len}; | |
285 | struct msghdr msg = { .msg_flags = MSG_DONTWAIT | MSG_NOSIGNAL }; | |
98bdb0aa | 286 | int r; |
31b8006e | 287 | |
98bdb0aa SW |
288 | r = kernel_recvmsg(sock, &msg, &iov, 1, len, msg.msg_flags); |
289 | if (r == -EAGAIN) | |
290 | r = 0; | |
291 | return r; | |
31b8006e SW |
292 | } |
293 | ||
294 | /* | |
295 | * write something. @more is true if caller will be sending more data | |
296 | * shortly. | |
297 | */ | |
298 | static int ceph_tcp_sendmsg(struct socket *sock, struct kvec *iov, | |
299 | size_t kvlen, size_t len, int more) | |
300 | { | |
301 | struct msghdr msg = { .msg_flags = MSG_DONTWAIT | MSG_NOSIGNAL }; | |
42961d23 | 302 | int r; |
31b8006e SW |
303 | |
304 | if (more) | |
305 | msg.msg_flags |= MSG_MORE; | |
306 | else | |
307 | msg.msg_flags |= MSG_EOR; /* superfluous, but what the hell */ | |
308 | ||
42961d23 SW |
309 | r = kernel_sendmsg(sock, &msg, iov, kvlen, len); |
310 | if (r == -EAGAIN) | |
311 | r = 0; | |
312 | return r; | |
31b8006e SW |
313 | } |
314 | ||
315 | ||
316 | /* | |
317 | * Shutdown/close the socket for the given connection. | |
318 | */ | |
319 | static int con_close_socket(struct ceph_connection *con) | |
320 | { | |
321 | int rc; | |
322 | ||
323 | dout("con_close_socket on %p sock %p\n", con, con->sock); | |
324 | if (!con->sock) | |
325 | return 0; | |
326 | set_bit(SOCK_CLOSED, &con->state); | |
327 | rc = con->sock->ops->shutdown(con->sock, SHUT_RDWR); | |
328 | sock_release(con->sock); | |
329 | con->sock = NULL; | |
330 | clear_bit(SOCK_CLOSED, &con->state); | |
331 | return rc; | |
332 | } | |
333 | ||
334 | /* | |
335 | * Reset a connection. Discard all incoming and outgoing messages | |
336 | * and clear *_seq state. | |
337 | */ | |
338 | static void ceph_msg_remove(struct ceph_msg *msg) | |
339 | { | |
340 | list_del_init(&msg->list_head); | |
341 | ceph_msg_put(msg); | |
342 | } | |
343 | static void ceph_msg_remove_list(struct list_head *head) | |
344 | { | |
345 | while (!list_empty(head)) { | |
346 | struct ceph_msg *msg = list_first_entry(head, struct ceph_msg, | |
347 | list_head); | |
348 | ceph_msg_remove(msg); | |
349 | } | |
350 | } | |
351 | ||
352 | static void reset_connection(struct ceph_connection *con) | |
353 | { | |
354 | /* reset connection, out_queue, msg_ and connect_seq */ | |
355 | /* discard existing out_queue and msg_seq */ | |
31b8006e SW |
356 | ceph_msg_remove_list(&con->out_queue); |
357 | ceph_msg_remove_list(&con->out_sent); | |
358 | ||
cf3e5c40 SW |
359 | if (con->in_msg) { |
360 | ceph_msg_put(con->in_msg); | |
361 | con->in_msg = NULL; | |
362 | } | |
363 | ||
31b8006e SW |
364 | con->connect_seq = 0; |
365 | con->out_seq = 0; | |
c86a2930 SW |
366 | if (con->out_msg) { |
367 | ceph_msg_put(con->out_msg); | |
368 | con->out_msg = NULL; | |
369 | } | |
31b8006e | 370 | con->in_seq = 0; |
0e0d5e0c | 371 | con->in_seq_acked = 0; |
31b8006e SW |
372 | } |
373 | ||
374 | /* | |
375 | * mark a peer down. drop any open connections. | |
376 | */ | |
377 | void ceph_con_close(struct ceph_connection *con) | |
378 | { | |
3d14c5d2 YS |
379 | dout("con_close %p peer %s\n", con, |
380 | ceph_pr_addr(&con->peer_addr.in_addr)); | |
31b8006e SW |
381 | set_bit(CLOSED, &con->state); /* in case there's queued work */ |
382 | clear_bit(STANDBY, &con->state); /* avoid connect_seq bump */ | |
1679f876 SW |
383 | clear_bit(LOSSYTX, &con->state); /* so we retry next connect */ |
384 | clear_bit(KEEPALIVE_PENDING, &con->state); | |
385 | clear_bit(WRITE_PENDING, &con->state); | |
ec302645 | 386 | mutex_lock(&con->mutex); |
31b8006e | 387 | reset_connection(con); |
6f2bc3ff | 388 | con->peer_global_seq = 0; |
91e45ce3 | 389 | cancel_delayed_work(&con->work); |
ec302645 | 390 | mutex_unlock(&con->mutex); |
31b8006e SW |
391 | queue_con(con); |
392 | } | |
3d14c5d2 | 393 | EXPORT_SYMBOL(ceph_con_close); |
31b8006e | 394 | |
31b8006e SW |
395 | /* |
396 | * Reopen a closed connection, with a new peer address. | |
397 | */ | |
398 | void ceph_con_open(struct ceph_connection *con, struct ceph_entity_addr *addr) | |
399 | { | |
3d14c5d2 | 400 | dout("con_open %p %s\n", con, ceph_pr_addr(&addr->in_addr)); |
31b8006e SW |
401 | set_bit(OPENING, &con->state); |
402 | clear_bit(CLOSED, &con->state); | |
403 | memcpy(&con->peer_addr, addr, sizeof(*addr)); | |
03c677e1 | 404 | con->delay = 0; /* reset backoff memory */ |
31b8006e SW |
405 | queue_con(con); |
406 | } | |
3d14c5d2 | 407 | EXPORT_SYMBOL(ceph_con_open); |
31b8006e | 408 | |
87b315a5 SW |
409 | /* |
410 | * return true if this connection ever successfully opened | |
411 | */ | |
412 | bool ceph_con_opened(struct ceph_connection *con) | |
413 | { | |
414 | return con->connect_seq > 0; | |
415 | } | |
416 | ||
31b8006e SW |
417 | /* |
418 | * generic get/put | |
419 | */ | |
420 | struct ceph_connection *ceph_con_get(struct ceph_connection *con) | |
421 | { | |
422 | dout("con_get %p nref = %d -> %d\n", con, | |
423 | atomic_read(&con->nref), atomic_read(&con->nref) + 1); | |
424 | if (atomic_inc_not_zero(&con->nref)) | |
425 | return con; | |
426 | return NULL; | |
427 | } | |
428 | ||
429 | void ceph_con_put(struct ceph_connection *con) | |
430 | { | |
431 | dout("con_put %p nref = %d -> %d\n", con, | |
432 | atomic_read(&con->nref), atomic_read(&con->nref) - 1); | |
433 | BUG_ON(atomic_read(&con->nref) == 0); | |
434 | if (atomic_dec_and_test(&con->nref)) { | |
71ececda | 435 | BUG_ON(con->sock); |
31b8006e SW |
436 | kfree(con); |
437 | } | |
438 | } | |
439 | ||
440 | /* | |
441 | * initialize a new connection. | |
442 | */ | |
443 | void ceph_con_init(struct ceph_messenger *msgr, struct ceph_connection *con) | |
444 | { | |
445 | dout("con_init %p\n", con); | |
446 | memset(con, 0, sizeof(*con)); | |
447 | atomic_set(&con->nref, 1); | |
448 | con->msgr = msgr; | |
ec302645 | 449 | mutex_init(&con->mutex); |
31b8006e SW |
450 | INIT_LIST_HEAD(&con->out_queue); |
451 | INIT_LIST_HEAD(&con->out_sent); | |
452 | INIT_DELAYED_WORK(&con->work, con_work); | |
453 | } | |
3d14c5d2 | 454 | EXPORT_SYMBOL(ceph_con_init); |
31b8006e SW |
455 | |
456 | ||
457 | /* | |
458 | * We maintain a global counter to order connection attempts. Get | |
459 | * a unique seq greater than @gt. | |
460 | */ | |
461 | static u32 get_global_seq(struct ceph_messenger *msgr, u32 gt) | |
462 | { | |
463 | u32 ret; | |
464 | ||
465 | spin_lock(&msgr->global_seq_lock); | |
466 | if (msgr->global_seq < gt) | |
467 | msgr->global_seq = gt; | |
468 | ret = ++msgr->global_seq; | |
469 | spin_unlock(&msgr->global_seq_lock); | |
470 | return ret; | |
471 | } | |
472 | ||
473 | ||
474 | /* | |
475 | * Prepare footer for currently outgoing message, and finish things | |
476 | * off. Assumes out_kvec* are already valid.. we just add on to the end. | |
477 | */ | |
478 | static void prepare_write_message_footer(struct ceph_connection *con, int v) | |
479 | { | |
480 | struct ceph_msg *m = con->out_msg; | |
481 | ||
482 | dout("prepare_write_message_footer %p\n", con); | |
483 | con->out_kvec_is_msg = true; | |
484 | con->out_kvec[v].iov_base = &m->footer; | |
485 | con->out_kvec[v].iov_len = sizeof(m->footer); | |
486 | con->out_kvec_bytes += sizeof(m->footer); | |
487 | con->out_kvec_left++; | |
488 | con->out_more = m->more_to_follow; | |
c86a2930 | 489 | con->out_msg_done = true; |
31b8006e SW |
490 | } |
491 | ||
492 | /* | |
493 | * Prepare headers for the next outgoing message. | |
494 | */ | |
495 | static void prepare_write_message(struct ceph_connection *con) | |
496 | { | |
497 | struct ceph_msg *m; | |
498 | int v = 0; | |
499 | ||
500 | con->out_kvec_bytes = 0; | |
501 | con->out_kvec_is_msg = true; | |
c86a2930 | 502 | con->out_msg_done = false; |
31b8006e SW |
503 | |
504 | /* Sneak an ack in there first? If we can get it into the same | |
505 | * TCP packet that's a good thing. */ | |
506 | if (con->in_seq > con->in_seq_acked) { | |
507 | con->in_seq_acked = con->in_seq; | |
508 | con->out_kvec[v].iov_base = &tag_ack; | |
509 | con->out_kvec[v++].iov_len = 1; | |
510 | con->out_temp_ack = cpu_to_le64(con->in_seq_acked); | |
511 | con->out_kvec[v].iov_base = &con->out_temp_ack; | |
512 | con->out_kvec[v++].iov_len = sizeof(con->out_temp_ack); | |
513 | con->out_kvec_bytes = 1 + sizeof(con->out_temp_ack); | |
514 | } | |
515 | ||
31b8006e SW |
516 | m = list_first_entry(&con->out_queue, |
517 | struct ceph_msg, list_head); | |
c86a2930 | 518 | con->out_msg = m; |
4cf9d544 SW |
519 | |
520 | /* put message on sent list */ | |
521 | ceph_msg_get(m); | |
522 | list_move_tail(&m->list_head, &con->out_sent); | |
31b8006e | 523 | |
e84346b7 SW |
524 | /* |
525 | * only assign outgoing seq # if we haven't sent this message | |
526 | * yet. if it is requeued, resend with it's original seq. | |
527 | */ | |
528 | if (m->needs_out_seq) { | |
529 | m->hdr.seq = cpu_to_le64(++con->out_seq); | |
530 | m->needs_out_seq = false; | |
531 | } | |
31b8006e SW |
532 | |
533 | dout("prepare_write_message %p seq %lld type %d len %d+%d+%d %d pgs\n", | |
534 | m, con->out_seq, le16_to_cpu(m->hdr.type), | |
535 | le32_to_cpu(m->hdr.front_len), le32_to_cpu(m->hdr.middle_len), | |
536 | le32_to_cpu(m->hdr.data_len), | |
537 | m->nr_pages); | |
538 | BUG_ON(le32_to_cpu(m->hdr.front_len) != m->front.iov_len); | |
539 | ||
540 | /* tag + hdr + front + middle */ | |
541 | con->out_kvec[v].iov_base = &tag_msg; | |
542 | con->out_kvec[v++].iov_len = 1; | |
543 | con->out_kvec[v].iov_base = &m->hdr; | |
544 | con->out_kvec[v++].iov_len = sizeof(m->hdr); | |
545 | con->out_kvec[v++] = m->front; | |
546 | if (m->middle) | |
547 | con->out_kvec[v++] = m->middle->vec; | |
548 | con->out_kvec_left = v; | |
549 | con->out_kvec_bytes += 1 + sizeof(m->hdr) + m->front.iov_len + | |
550 | (m->middle ? m->middle->vec.iov_len : 0); | |
551 | con->out_kvec_cur = con->out_kvec; | |
552 | ||
553 | /* fill in crc (except data pages), footer */ | |
554 | con->out_msg->hdr.crc = | |
555 | cpu_to_le32(crc32c(0, (void *)&m->hdr, | |
556 | sizeof(m->hdr) - sizeof(m->hdr.crc))); | |
557 | con->out_msg->footer.flags = CEPH_MSG_FOOTER_COMPLETE; | |
558 | con->out_msg->footer.front_crc = | |
559 | cpu_to_le32(crc32c(0, m->front.iov_base, m->front.iov_len)); | |
560 | if (m->middle) | |
561 | con->out_msg->footer.middle_crc = | |
562 | cpu_to_le32(crc32c(0, m->middle->vec.iov_base, | |
563 | m->middle->vec.iov_len)); | |
564 | else | |
565 | con->out_msg->footer.middle_crc = 0; | |
566 | con->out_msg->footer.data_crc = 0; | |
567 | dout("prepare_write_message front_crc %u data_crc %u\n", | |
568 | le32_to_cpu(con->out_msg->footer.front_crc), | |
569 | le32_to_cpu(con->out_msg->footer.middle_crc)); | |
570 | ||
571 | /* is there a data payload? */ | |
572 | if (le32_to_cpu(m->hdr.data_len) > 0) { | |
573 | /* initialize page iterator */ | |
574 | con->out_msg_pos.page = 0; | |
68b4476b | 575 | if (m->pages) |
c5c6b19d | 576 | con->out_msg_pos.page_pos = m->page_alignment; |
68b4476b YS |
577 | else |
578 | con->out_msg_pos.page_pos = 0; | |
31b8006e SW |
579 | con->out_msg_pos.data_pos = 0; |
580 | con->out_msg_pos.did_page_crc = 0; | |
581 | con->out_more = 1; /* data + footer will follow */ | |
582 | } else { | |
583 | /* no, queue up footer too and be done */ | |
584 | prepare_write_message_footer(con, v); | |
585 | } | |
586 | ||
587 | set_bit(WRITE_PENDING, &con->state); | |
588 | } | |
589 | ||
590 | /* | |
591 | * Prepare an ack. | |
592 | */ | |
593 | static void prepare_write_ack(struct ceph_connection *con) | |
594 | { | |
595 | dout("prepare_write_ack %p %llu -> %llu\n", con, | |
596 | con->in_seq_acked, con->in_seq); | |
597 | con->in_seq_acked = con->in_seq; | |
598 | ||
599 | con->out_kvec[0].iov_base = &tag_ack; | |
600 | con->out_kvec[0].iov_len = 1; | |
601 | con->out_temp_ack = cpu_to_le64(con->in_seq_acked); | |
602 | con->out_kvec[1].iov_base = &con->out_temp_ack; | |
603 | con->out_kvec[1].iov_len = sizeof(con->out_temp_ack); | |
604 | con->out_kvec_left = 2; | |
605 | con->out_kvec_bytes = 1 + sizeof(con->out_temp_ack); | |
606 | con->out_kvec_cur = con->out_kvec; | |
607 | con->out_more = 1; /* more will follow.. eventually.. */ | |
608 | set_bit(WRITE_PENDING, &con->state); | |
609 | } | |
610 | ||
611 | /* | |
612 | * Prepare to write keepalive byte. | |
613 | */ | |
614 | static void prepare_write_keepalive(struct ceph_connection *con) | |
615 | { | |
616 | dout("prepare_write_keepalive %p\n", con); | |
617 | con->out_kvec[0].iov_base = &tag_keepalive; | |
618 | con->out_kvec[0].iov_len = 1; | |
619 | con->out_kvec_left = 1; | |
620 | con->out_kvec_bytes = 1; | |
621 | con->out_kvec_cur = con->out_kvec; | |
622 | set_bit(WRITE_PENDING, &con->state); | |
623 | } | |
624 | ||
625 | /* | |
626 | * Connection negotiation. | |
627 | */ | |
628 | ||
0da5d703 | 629 | static int prepare_connect_authorizer(struct ceph_connection *con) |
4e7a5dcd SW |
630 | { |
631 | void *auth_buf; | |
632 | int auth_len = 0; | |
633 | int auth_protocol = 0; | |
634 | ||
ec302645 | 635 | mutex_unlock(&con->mutex); |
4e7a5dcd SW |
636 | if (con->ops->get_authorizer) |
637 | con->ops->get_authorizer(con, &auth_buf, &auth_len, | |
638 | &auth_protocol, &con->auth_reply_buf, | |
639 | &con->auth_reply_buf_len, | |
640 | con->auth_retry); | |
ec302645 | 641 | mutex_lock(&con->mutex); |
4e7a5dcd | 642 | |
0da5d703 SW |
643 | if (test_bit(CLOSED, &con->state) || |
644 | test_bit(OPENING, &con->state)) | |
645 | return -EAGAIN; | |
646 | ||
4e7a5dcd SW |
647 | con->out_connect.authorizer_protocol = cpu_to_le32(auth_protocol); |
648 | con->out_connect.authorizer_len = cpu_to_le32(auth_len); | |
649 | ||
e8f54ce1 SW |
650 | if (auth_len) { |
651 | con->out_kvec[con->out_kvec_left].iov_base = auth_buf; | |
652 | con->out_kvec[con->out_kvec_left].iov_len = auth_len; | |
653 | con->out_kvec_left++; | |
654 | con->out_kvec_bytes += auth_len; | |
655 | } | |
0da5d703 | 656 | return 0; |
4e7a5dcd SW |
657 | } |
658 | ||
31b8006e SW |
659 | /* |
660 | * We connected to a peer and are saying hello. | |
661 | */ | |
eed0ef2c SW |
662 | static void prepare_write_banner(struct ceph_messenger *msgr, |
663 | struct ceph_connection *con) | |
31b8006e SW |
664 | { |
665 | int len = strlen(CEPH_BANNER); | |
eed0ef2c SW |
666 | |
667 | con->out_kvec[0].iov_base = CEPH_BANNER; | |
668 | con->out_kvec[0].iov_len = len; | |
669 | con->out_kvec[1].iov_base = &msgr->my_enc_addr; | |
670 | con->out_kvec[1].iov_len = sizeof(msgr->my_enc_addr); | |
671 | con->out_kvec_left = 2; | |
672 | con->out_kvec_bytes = len + sizeof(msgr->my_enc_addr); | |
673 | con->out_kvec_cur = con->out_kvec; | |
674 | con->out_more = 0; | |
675 | set_bit(WRITE_PENDING, &con->state); | |
676 | } | |
677 | ||
0da5d703 SW |
678 | static int prepare_write_connect(struct ceph_messenger *msgr, |
679 | struct ceph_connection *con, | |
680 | int after_banner) | |
eed0ef2c | 681 | { |
31b8006e SW |
682 | unsigned global_seq = get_global_seq(con->msgr, 0); |
683 | int proto; | |
684 | ||
685 | switch (con->peer_name.type) { | |
686 | case CEPH_ENTITY_TYPE_MON: | |
687 | proto = CEPH_MONC_PROTOCOL; | |
688 | break; | |
689 | case CEPH_ENTITY_TYPE_OSD: | |
690 | proto = CEPH_OSDC_PROTOCOL; | |
691 | break; | |
692 | case CEPH_ENTITY_TYPE_MDS: | |
693 | proto = CEPH_MDSC_PROTOCOL; | |
694 | break; | |
695 | default: | |
696 | BUG(); | |
697 | } | |
698 | ||
699 | dout("prepare_write_connect %p cseq=%d gseq=%d proto=%d\n", con, | |
700 | con->connect_seq, global_seq, proto); | |
4e7a5dcd | 701 | |
3d14c5d2 | 702 | con->out_connect.features = cpu_to_le64(msgr->supported_features); |
31b8006e SW |
703 | con->out_connect.host_type = cpu_to_le32(CEPH_ENTITY_TYPE_CLIENT); |
704 | con->out_connect.connect_seq = cpu_to_le32(con->connect_seq); | |
705 | con->out_connect.global_seq = cpu_to_le32(global_seq); | |
706 | con->out_connect.protocol_version = cpu_to_le32(proto); | |
707 | con->out_connect.flags = 0; | |
31b8006e | 708 | |
eed0ef2c SW |
709 | if (!after_banner) { |
710 | con->out_kvec_left = 0; | |
711 | con->out_kvec_bytes = 0; | |
712 | } | |
713 | con->out_kvec[con->out_kvec_left].iov_base = &con->out_connect; | |
714 | con->out_kvec[con->out_kvec_left].iov_len = sizeof(con->out_connect); | |
715 | con->out_kvec_left++; | |
716 | con->out_kvec_bytes += sizeof(con->out_connect); | |
31b8006e SW |
717 | con->out_kvec_cur = con->out_kvec; |
718 | con->out_more = 0; | |
719 | set_bit(WRITE_PENDING, &con->state); | |
4e7a5dcd | 720 | |
0da5d703 | 721 | return prepare_connect_authorizer(con); |
31b8006e SW |
722 | } |
723 | ||
724 | ||
725 | /* | |
726 | * write as much of pending kvecs to the socket as we can. | |
727 | * 1 -> done | |
728 | * 0 -> socket full, but more to do | |
729 | * <0 -> error | |
730 | */ | |
731 | static int write_partial_kvec(struct ceph_connection *con) | |
732 | { | |
733 | int ret; | |
734 | ||
735 | dout("write_partial_kvec %p %d left\n", con, con->out_kvec_bytes); | |
736 | while (con->out_kvec_bytes > 0) { | |
737 | ret = ceph_tcp_sendmsg(con->sock, con->out_kvec_cur, | |
738 | con->out_kvec_left, con->out_kvec_bytes, | |
739 | con->out_more); | |
740 | if (ret <= 0) | |
741 | goto out; | |
742 | con->out_kvec_bytes -= ret; | |
743 | if (con->out_kvec_bytes == 0) | |
744 | break; /* done */ | |
745 | while (ret > 0) { | |
746 | if (ret >= con->out_kvec_cur->iov_len) { | |
747 | ret -= con->out_kvec_cur->iov_len; | |
748 | con->out_kvec_cur++; | |
749 | con->out_kvec_left--; | |
750 | } else { | |
751 | con->out_kvec_cur->iov_len -= ret; | |
752 | con->out_kvec_cur->iov_base += ret; | |
753 | ret = 0; | |
754 | break; | |
755 | } | |
756 | } | |
757 | } | |
758 | con->out_kvec_left = 0; | |
759 | con->out_kvec_is_msg = false; | |
760 | ret = 1; | |
761 | out: | |
762 | dout("write_partial_kvec %p %d left in %d kvecs ret = %d\n", con, | |
763 | con->out_kvec_bytes, con->out_kvec_left, ret); | |
764 | return ret; /* done! */ | |
765 | } | |
766 | ||
68b4476b YS |
767 | #ifdef CONFIG_BLOCK |
768 | static void init_bio_iter(struct bio *bio, struct bio **iter, int *seg) | |
769 | { | |
770 | if (!bio) { | |
771 | *iter = NULL; | |
772 | *seg = 0; | |
773 | return; | |
774 | } | |
775 | *iter = bio; | |
776 | *seg = bio->bi_idx; | |
777 | } | |
778 | ||
779 | static void iter_bio_next(struct bio **bio_iter, int *seg) | |
780 | { | |
781 | if (*bio_iter == NULL) | |
782 | return; | |
783 | ||
784 | BUG_ON(*seg >= (*bio_iter)->bi_vcnt); | |
785 | ||
786 | (*seg)++; | |
787 | if (*seg == (*bio_iter)->bi_vcnt) | |
788 | init_bio_iter((*bio_iter)->bi_next, bio_iter, seg); | |
789 | } | |
790 | #endif | |
791 | ||
31b8006e SW |
792 | /* |
793 | * Write as much message data payload as we can. If we finish, queue | |
794 | * up the footer. | |
795 | * 1 -> done, footer is now queued in out_kvec[]. | |
796 | * 0 -> socket full, but more to do | |
797 | * <0 -> error | |
798 | */ | |
799 | static int write_partial_msg_pages(struct ceph_connection *con) | |
800 | { | |
801 | struct ceph_msg *msg = con->out_msg; | |
802 | unsigned data_len = le32_to_cpu(msg->hdr.data_len); | |
803 | size_t len; | |
804 | int crc = con->msgr->nocrc; | |
805 | int ret; | |
68b4476b YS |
806 | int total_max_write; |
807 | int in_trail = 0; | |
808 | size_t trail_len = (msg->trail ? msg->trail->length : 0); | |
31b8006e SW |
809 | |
810 | dout("write_partial_msg_pages %p msg %p page %d/%d offset %d\n", | |
811 | con, con->out_msg, con->out_msg_pos.page, con->out_msg->nr_pages, | |
812 | con->out_msg_pos.page_pos); | |
813 | ||
68b4476b YS |
814 | #ifdef CONFIG_BLOCK |
815 | if (msg->bio && !msg->bio_iter) | |
816 | init_bio_iter(msg->bio, &msg->bio_iter, &msg->bio_seg); | |
817 | #endif | |
818 | ||
819 | while (data_len > con->out_msg_pos.data_pos) { | |
31b8006e SW |
820 | struct page *page = NULL; |
821 | void *kaddr = NULL; | |
68b4476b YS |
822 | int max_write = PAGE_SIZE; |
823 | int page_shift = 0; | |
824 | ||
825 | total_max_write = data_len - trail_len - | |
826 | con->out_msg_pos.data_pos; | |
31b8006e SW |
827 | |
828 | /* | |
829 | * if we are calculating the data crc (the default), we need | |
830 | * to map the page. if our pages[] has been revoked, use the | |
831 | * zero page. | |
832 | */ | |
68b4476b YS |
833 | |
834 | /* have we reached the trail part of the data? */ | |
835 | if (con->out_msg_pos.data_pos >= data_len - trail_len) { | |
836 | in_trail = 1; | |
837 | ||
838 | total_max_write = data_len - con->out_msg_pos.data_pos; | |
839 | ||
840 | page = list_first_entry(&msg->trail->head, | |
841 | struct page, lru); | |
842 | if (crc) | |
843 | kaddr = kmap(page); | |
844 | max_write = PAGE_SIZE; | |
845 | } else if (msg->pages) { | |
31b8006e SW |
846 | page = msg->pages[con->out_msg_pos.page]; |
847 | if (crc) | |
848 | kaddr = kmap(page); | |
58bb3b37 SW |
849 | } else if (msg->pagelist) { |
850 | page = list_first_entry(&msg->pagelist->head, | |
851 | struct page, lru); | |
852 | if (crc) | |
853 | kaddr = kmap(page); | |
68b4476b YS |
854 | #ifdef CONFIG_BLOCK |
855 | } else if (msg->bio) { | |
856 | struct bio_vec *bv; | |
857 | ||
858 | bv = bio_iovec_idx(msg->bio_iter, msg->bio_seg); | |
859 | page = bv->bv_page; | |
860 | page_shift = bv->bv_offset; | |
861 | if (crc) | |
862 | kaddr = kmap(page) + page_shift; | |
863 | max_write = bv->bv_len; | |
864 | #endif | |
31b8006e | 865 | } else { |
57666519 | 866 | page = zero_page; |
31b8006e | 867 | if (crc) |
57666519 | 868 | kaddr = zero_page_address; |
31b8006e | 869 | } |
68b4476b YS |
870 | len = min_t(int, max_write - con->out_msg_pos.page_pos, |
871 | total_max_write); | |
872 | ||
31b8006e SW |
873 | if (crc && !con->out_msg_pos.did_page_crc) { |
874 | void *base = kaddr + con->out_msg_pos.page_pos; | |
875 | u32 tmpcrc = le32_to_cpu(con->out_msg->footer.data_crc); | |
876 | ||
877 | BUG_ON(kaddr == NULL); | |
878 | con->out_msg->footer.data_crc = | |
879 | cpu_to_le32(crc32c(tmpcrc, base, len)); | |
880 | con->out_msg_pos.did_page_crc = 1; | |
881 | } | |
31b8006e | 882 | ret = kernel_sendpage(con->sock, page, |
68b4476b YS |
883 | con->out_msg_pos.page_pos + page_shift, |
884 | len, | |
31b8006e SW |
885 | MSG_DONTWAIT | MSG_NOSIGNAL | |
886 | MSG_MORE); | |
887 | ||
68b4476b YS |
888 | if (crc && |
889 | (msg->pages || msg->pagelist || msg->bio || in_trail)) | |
31b8006e SW |
890 | kunmap(page); |
891 | ||
42961d23 SW |
892 | if (ret == -EAGAIN) |
893 | ret = 0; | |
31b8006e SW |
894 | if (ret <= 0) |
895 | goto out; | |
896 | ||
897 | con->out_msg_pos.data_pos += ret; | |
898 | con->out_msg_pos.page_pos += ret; | |
899 | if (ret == len) { | |
900 | con->out_msg_pos.page_pos = 0; | |
901 | con->out_msg_pos.page++; | |
902 | con->out_msg_pos.did_page_crc = 0; | |
68b4476b YS |
903 | if (in_trail) |
904 | list_move_tail(&page->lru, | |
905 | &msg->trail->head); | |
906 | else if (msg->pagelist) | |
58bb3b37 SW |
907 | list_move_tail(&page->lru, |
908 | &msg->pagelist->head); | |
68b4476b YS |
909 | #ifdef CONFIG_BLOCK |
910 | else if (msg->bio) | |
911 | iter_bio_next(&msg->bio_iter, &msg->bio_seg); | |
912 | #endif | |
31b8006e SW |
913 | } |
914 | } | |
915 | ||
916 | dout("write_partial_msg_pages %p msg %p done\n", con, msg); | |
917 | ||
918 | /* prepare and queue up footer, too */ | |
919 | if (!crc) | |
920 | con->out_msg->footer.flags |= CEPH_MSG_FOOTER_NOCRC; | |
921 | con->out_kvec_bytes = 0; | |
922 | con->out_kvec_left = 0; | |
923 | con->out_kvec_cur = con->out_kvec; | |
924 | prepare_write_message_footer(con, 0); | |
925 | ret = 1; | |
926 | out: | |
927 | return ret; | |
928 | } | |
929 | ||
930 | /* | |
931 | * write some zeros | |
932 | */ | |
933 | static int write_partial_skip(struct ceph_connection *con) | |
934 | { | |
935 | int ret; | |
936 | ||
937 | while (con->out_skip > 0) { | |
938 | struct kvec iov = { | |
57666519 | 939 | .iov_base = zero_page_address, |
31b8006e SW |
940 | .iov_len = min(con->out_skip, (int)PAGE_CACHE_SIZE) |
941 | }; | |
942 | ||
943 | ret = ceph_tcp_sendmsg(con->sock, &iov, 1, iov.iov_len, 1); | |
944 | if (ret <= 0) | |
945 | goto out; | |
946 | con->out_skip -= ret; | |
947 | } | |
948 | ret = 1; | |
949 | out: | |
950 | return ret; | |
951 | } | |
952 | ||
953 | /* | |
954 | * Prepare to read connection handshake, or an ack. | |
955 | */ | |
eed0ef2c SW |
956 | static void prepare_read_banner(struct ceph_connection *con) |
957 | { | |
958 | dout("prepare_read_banner %p\n", con); | |
959 | con->in_base_pos = 0; | |
960 | } | |
961 | ||
31b8006e SW |
962 | static void prepare_read_connect(struct ceph_connection *con) |
963 | { | |
964 | dout("prepare_read_connect %p\n", con); | |
965 | con->in_base_pos = 0; | |
966 | } | |
967 | ||
968 | static void prepare_read_ack(struct ceph_connection *con) | |
969 | { | |
970 | dout("prepare_read_ack %p\n", con); | |
971 | con->in_base_pos = 0; | |
972 | } | |
973 | ||
974 | static void prepare_read_tag(struct ceph_connection *con) | |
975 | { | |
976 | dout("prepare_read_tag %p\n", con); | |
977 | con->in_base_pos = 0; | |
978 | con->in_tag = CEPH_MSGR_TAG_READY; | |
979 | } | |
980 | ||
981 | /* | |
982 | * Prepare to read a message. | |
983 | */ | |
984 | static int prepare_read_message(struct ceph_connection *con) | |
985 | { | |
986 | dout("prepare_read_message %p\n", con); | |
987 | BUG_ON(con->in_msg != NULL); | |
988 | con->in_base_pos = 0; | |
989 | con->in_front_crc = con->in_middle_crc = con->in_data_crc = 0; | |
990 | return 0; | |
991 | } | |
992 | ||
993 | ||
994 | static int read_partial(struct ceph_connection *con, | |
995 | int *to, int size, void *object) | |
996 | { | |
997 | *to += size; | |
998 | while (con->in_base_pos < *to) { | |
999 | int left = *to - con->in_base_pos; | |
1000 | int have = size - left; | |
1001 | int ret = ceph_tcp_recvmsg(con->sock, object + have, left); | |
1002 | if (ret <= 0) | |
1003 | return ret; | |
1004 | con->in_base_pos += ret; | |
1005 | } | |
1006 | return 1; | |
1007 | } | |
1008 | ||
1009 | ||
1010 | /* | |
1011 | * Read all or part of the connect-side handshake on a new connection | |
1012 | */ | |
eed0ef2c | 1013 | static int read_partial_banner(struct ceph_connection *con) |
31b8006e SW |
1014 | { |
1015 | int ret, to = 0; | |
1016 | ||
eed0ef2c | 1017 | dout("read_partial_banner %p at %d\n", con, con->in_base_pos); |
31b8006e SW |
1018 | |
1019 | /* peer's banner */ | |
1020 | ret = read_partial(con, &to, strlen(CEPH_BANNER), con->in_banner); | |
1021 | if (ret <= 0) | |
1022 | goto out; | |
1023 | ret = read_partial(con, &to, sizeof(con->actual_peer_addr), | |
1024 | &con->actual_peer_addr); | |
1025 | if (ret <= 0) | |
1026 | goto out; | |
1027 | ret = read_partial(con, &to, sizeof(con->peer_addr_for_me), | |
1028 | &con->peer_addr_for_me); | |
1029 | if (ret <= 0) | |
1030 | goto out; | |
eed0ef2c SW |
1031 | out: |
1032 | return ret; | |
1033 | } | |
1034 | ||
1035 | static int read_partial_connect(struct ceph_connection *con) | |
1036 | { | |
1037 | int ret, to = 0; | |
1038 | ||
1039 | dout("read_partial_connect %p at %d\n", con, con->in_base_pos); | |
1040 | ||
31b8006e SW |
1041 | ret = read_partial(con, &to, sizeof(con->in_reply), &con->in_reply); |
1042 | if (ret <= 0) | |
1043 | goto out; | |
4e7a5dcd SW |
1044 | ret = read_partial(con, &to, le32_to_cpu(con->in_reply.authorizer_len), |
1045 | con->auth_reply_buf); | |
1046 | if (ret <= 0) | |
1047 | goto out; | |
31b8006e | 1048 | |
4e7a5dcd SW |
1049 | dout("read_partial_connect %p tag %d, con_seq = %u, g_seq = %u\n", |
1050 | con, (int)con->in_reply.tag, | |
1051 | le32_to_cpu(con->in_reply.connect_seq), | |
31b8006e SW |
1052 | le32_to_cpu(con->in_reply.global_seq)); |
1053 | out: | |
1054 | return ret; | |
eed0ef2c | 1055 | |
31b8006e SW |
1056 | } |
1057 | ||
1058 | /* | |
1059 | * Verify the hello banner looks okay. | |
1060 | */ | |
1061 | static int verify_hello(struct ceph_connection *con) | |
1062 | { | |
1063 | if (memcmp(con->in_banner, CEPH_BANNER, strlen(CEPH_BANNER))) { | |
13e38c8a | 1064 | pr_err("connect to %s got bad banner\n", |
3d14c5d2 | 1065 | ceph_pr_addr(&con->peer_addr.in_addr)); |
31b8006e SW |
1066 | con->error_msg = "protocol error, bad banner"; |
1067 | return -1; | |
1068 | } | |
1069 | return 0; | |
1070 | } | |
1071 | ||
1072 | static bool addr_is_blank(struct sockaddr_storage *ss) | |
1073 | { | |
1074 | switch (ss->ss_family) { | |
1075 | case AF_INET: | |
1076 | return ((struct sockaddr_in *)ss)->sin_addr.s_addr == 0; | |
1077 | case AF_INET6: | |
1078 | return | |
1079 | ((struct sockaddr_in6 *)ss)->sin6_addr.s6_addr32[0] == 0 && | |
1080 | ((struct sockaddr_in6 *)ss)->sin6_addr.s6_addr32[1] == 0 && | |
1081 | ((struct sockaddr_in6 *)ss)->sin6_addr.s6_addr32[2] == 0 && | |
1082 | ((struct sockaddr_in6 *)ss)->sin6_addr.s6_addr32[3] == 0; | |
1083 | } | |
1084 | return false; | |
1085 | } | |
1086 | ||
1087 | static int addr_port(struct sockaddr_storage *ss) | |
1088 | { | |
1089 | switch (ss->ss_family) { | |
1090 | case AF_INET: | |
f28bcfbe | 1091 | return ntohs(((struct sockaddr_in *)ss)->sin_port); |
31b8006e | 1092 | case AF_INET6: |
f28bcfbe | 1093 | return ntohs(((struct sockaddr_in6 *)ss)->sin6_port); |
31b8006e SW |
1094 | } |
1095 | return 0; | |
1096 | } | |
1097 | ||
1098 | static void addr_set_port(struct sockaddr_storage *ss, int p) | |
1099 | { | |
1100 | switch (ss->ss_family) { | |
1101 | case AF_INET: | |
1102 | ((struct sockaddr_in *)ss)->sin_port = htons(p); | |
a2a79609 | 1103 | break; |
31b8006e SW |
1104 | case AF_INET6: |
1105 | ((struct sockaddr_in6 *)ss)->sin6_port = htons(p); | |
a2a79609 | 1106 | break; |
31b8006e SW |
1107 | } |
1108 | } | |
1109 | ||
ee3b56f2 NW |
1110 | /* |
1111 | * Unlike other *_pton function semantics, zero indicates success. | |
1112 | */ | |
1113 | static int ceph_pton(const char *str, size_t len, struct sockaddr_storage *ss, | |
1114 | char delim, const char **ipend) | |
1115 | { | |
1116 | struct sockaddr_in *in4 = (void *)ss; | |
1117 | struct sockaddr_in6 *in6 = (void *)ss; | |
1118 | ||
1119 | memset(ss, 0, sizeof(*ss)); | |
1120 | ||
1121 | if (in4_pton(str, len, (u8 *)&in4->sin_addr.s_addr, delim, ipend)) { | |
1122 | ss->ss_family = AF_INET; | |
1123 | return 0; | |
1124 | } | |
1125 | ||
1126 | if (in6_pton(str, len, (u8 *)&in6->sin6_addr.s6_addr, delim, ipend)) { | |
1127 | ss->ss_family = AF_INET6; | |
1128 | return 0; | |
1129 | } | |
1130 | ||
1131 | return -EINVAL; | |
1132 | } | |
1133 | ||
1134 | /* | |
1135 | * Extract hostname string and resolve using kernel DNS facility. | |
1136 | */ | |
1137 | #ifdef CONFIG_CEPH_LIB_USE_DNS_RESOLVER | |
1138 | static int ceph_dns_resolve_name(const char *name, size_t namelen, | |
1139 | struct sockaddr_storage *ss, char delim, const char **ipend) | |
1140 | { | |
1141 | const char *end, *delim_p; | |
1142 | char *colon_p, *ip_addr = NULL; | |
1143 | int ip_len, ret; | |
1144 | ||
1145 | /* | |
1146 | * The end of the hostname occurs immediately preceding the delimiter or | |
1147 | * the port marker (':') where the delimiter takes precedence. | |
1148 | */ | |
1149 | delim_p = memchr(name, delim, namelen); | |
1150 | colon_p = memchr(name, ':', namelen); | |
1151 | ||
1152 | if (delim_p && colon_p) | |
1153 | end = delim_p < colon_p ? delim_p : colon_p; | |
1154 | else if (!delim_p && colon_p) | |
1155 | end = colon_p; | |
1156 | else { | |
1157 | end = delim_p; | |
1158 | if (!end) /* case: hostname:/ */ | |
1159 | end = name + namelen; | |
1160 | } | |
1161 | ||
1162 | if (end <= name) | |
1163 | return -EINVAL; | |
1164 | ||
1165 | /* do dns_resolve upcall */ | |
1166 | ip_len = dns_query(NULL, name, end - name, NULL, &ip_addr, NULL); | |
1167 | if (ip_len > 0) | |
1168 | ret = ceph_pton(ip_addr, ip_len, ss, -1, NULL); | |
1169 | else | |
1170 | ret = -ESRCH; | |
1171 | ||
1172 | kfree(ip_addr); | |
1173 | ||
1174 | *ipend = end; | |
1175 | ||
1176 | pr_info("resolve '%.*s' (ret=%d): %s\n", (int)(end - name), name, | |
1177 | ret, ret ? "failed" : ceph_pr_addr(ss)); | |
1178 | ||
1179 | return ret; | |
1180 | } | |
1181 | #else | |
1182 | static inline int ceph_dns_resolve_name(const char *name, size_t namelen, | |
1183 | struct sockaddr_storage *ss, char delim, const char **ipend) | |
1184 | { | |
1185 | return -EINVAL; | |
1186 | } | |
1187 | #endif | |
1188 | ||
1189 | /* | |
1190 | * Parse a server name (IP or hostname). If a valid IP address is not found | |
1191 | * then try to extract a hostname to resolve using userspace DNS upcall. | |
1192 | */ | |
1193 | static int ceph_parse_server_name(const char *name, size_t namelen, | |
1194 | struct sockaddr_storage *ss, char delim, const char **ipend) | |
1195 | { | |
1196 | int ret; | |
1197 | ||
1198 | ret = ceph_pton(name, namelen, ss, delim, ipend); | |
1199 | if (ret) | |
1200 | ret = ceph_dns_resolve_name(name, namelen, ss, delim, ipend); | |
1201 | ||
1202 | return ret; | |
1203 | } | |
1204 | ||
31b8006e SW |
1205 | /* |
1206 | * Parse an ip[:port] list into an addr array. Use the default | |
1207 | * monitor port if a port isn't specified. | |
1208 | */ | |
1209 | int ceph_parse_ips(const char *c, const char *end, | |
1210 | struct ceph_entity_addr *addr, | |
1211 | int max_count, int *count) | |
1212 | { | |
ee3b56f2 | 1213 | int i, ret = -EINVAL; |
31b8006e SW |
1214 | const char *p = c; |
1215 | ||
1216 | dout("parse_ips on '%.*s'\n", (int)(end-c), c); | |
1217 | for (i = 0; i < max_count; i++) { | |
1218 | const char *ipend; | |
1219 | struct sockaddr_storage *ss = &addr[i].in_addr; | |
31b8006e | 1220 | int port; |
39139f64 SW |
1221 | char delim = ','; |
1222 | ||
1223 | if (*p == '[') { | |
1224 | delim = ']'; | |
1225 | p++; | |
1226 | } | |
31b8006e | 1227 | |
ee3b56f2 NW |
1228 | ret = ceph_parse_server_name(p, end - p, ss, delim, &ipend); |
1229 | if (ret) | |
31b8006e | 1230 | goto bad; |
ee3b56f2 NW |
1231 | ret = -EINVAL; |
1232 | ||
31b8006e SW |
1233 | p = ipend; |
1234 | ||
39139f64 SW |
1235 | if (delim == ']') { |
1236 | if (*p != ']') { | |
1237 | dout("missing matching ']'\n"); | |
1238 | goto bad; | |
1239 | } | |
1240 | p++; | |
1241 | } | |
1242 | ||
31b8006e SW |
1243 | /* port? */ |
1244 | if (p < end && *p == ':') { | |
1245 | port = 0; | |
1246 | p++; | |
1247 | while (p < end && *p >= '0' && *p <= '9') { | |
1248 | port = (port * 10) + (*p - '0'); | |
1249 | p++; | |
1250 | } | |
1251 | if (port > 65535 || port == 0) | |
1252 | goto bad; | |
1253 | } else { | |
1254 | port = CEPH_MON_PORT; | |
1255 | } | |
1256 | ||
1257 | addr_set_port(ss, port); | |
1258 | ||
3d14c5d2 | 1259 | dout("parse_ips got %s\n", ceph_pr_addr(ss)); |
31b8006e SW |
1260 | |
1261 | if (p == end) | |
1262 | break; | |
1263 | if (*p != ',') | |
1264 | goto bad; | |
1265 | p++; | |
1266 | } | |
1267 | ||
1268 | if (p != end) | |
1269 | goto bad; | |
1270 | ||
1271 | if (count) | |
1272 | *count = i + 1; | |
1273 | return 0; | |
1274 | ||
1275 | bad: | |
39139f64 | 1276 | pr_err("parse_ips bad ip '%.*s'\n", (int)(end - c), c); |
ee3b56f2 | 1277 | return ret; |
31b8006e | 1278 | } |
3d14c5d2 | 1279 | EXPORT_SYMBOL(ceph_parse_ips); |
31b8006e | 1280 | |
eed0ef2c | 1281 | static int process_banner(struct ceph_connection *con) |
31b8006e | 1282 | { |
eed0ef2c | 1283 | dout("process_banner on %p\n", con); |
31b8006e SW |
1284 | |
1285 | if (verify_hello(con) < 0) | |
1286 | return -1; | |
1287 | ||
63f2d211 SW |
1288 | ceph_decode_addr(&con->actual_peer_addr); |
1289 | ceph_decode_addr(&con->peer_addr_for_me); | |
1290 | ||
31b8006e SW |
1291 | /* |
1292 | * Make sure the other end is who we wanted. note that the other | |
1293 | * end may not yet know their ip address, so if it's 0.0.0.0, give | |
1294 | * them the benefit of the doubt. | |
1295 | */ | |
103e2d3a SW |
1296 | if (memcmp(&con->peer_addr, &con->actual_peer_addr, |
1297 | sizeof(con->peer_addr)) != 0 && | |
31b8006e SW |
1298 | !(addr_is_blank(&con->actual_peer_addr.in_addr) && |
1299 | con->actual_peer_addr.nonce == con->peer_addr.nonce)) { | |
cd84db6e | 1300 | pr_warning("wrong peer, want %s/%d, got %s/%d\n", |
3d14c5d2 | 1301 | ceph_pr_addr(&con->peer_addr.in_addr), |
cd84db6e | 1302 | (int)le32_to_cpu(con->peer_addr.nonce), |
3d14c5d2 | 1303 | ceph_pr_addr(&con->actual_peer_addr.in_addr), |
cd84db6e | 1304 | (int)le32_to_cpu(con->actual_peer_addr.nonce)); |
58bb3b37 | 1305 | con->error_msg = "wrong peer at address"; |
31b8006e SW |
1306 | return -1; |
1307 | } | |
1308 | ||
1309 | /* | |
1310 | * did we learn our address? | |
1311 | */ | |
1312 | if (addr_is_blank(&con->msgr->inst.addr.in_addr)) { | |
1313 | int port = addr_port(&con->msgr->inst.addr.in_addr); | |
1314 | ||
1315 | memcpy(&con->msgr->inst.addr.in_addr, | |
1316 | &con->peer_addr_for_me.in_addr, | |
1317 | sizeof(con->peer_addr_for_me.in_addr)); | |
1318 | addr_set_port(&con->msgr->inst.addr.in_addr, port); | |
63f2d211 | 1319 | encode_my_addr(con->msgr); |
eed0ef2c | 1320 | dout("process_banner learned my addr is %s\n", |
3d14c5d2 | 1321 | ceph_pr_addr(&con->msgr->inst.addr.in_addr)); |
31b8006e SW |
1322 | } |
1323 | ||
eed0ef2c SW |
1324 | set_bit(NEGOTIATING, &con->state); |
1325 | prepare_read_connect(con); | |
1326 | return 0; | |
1327 | } | |
1328 | ||
04a419f9 SW |
1329 | static void fail_protocol(struct ceph_connection *con) |
1330 | { | |
1331 | reset_connection(con); | |
1332 | set_bit(CLOSED, &con->state); /* in case there's queued work */ | |
1333 | ||
1334 | mutex_unlock(&con->mutex); | |
1335 | if (con->ops->bad_proto) | |
1336 | con->ops->bad_proto(con); | |
1337 | mutex_lock(&con->mutex); | |
1338 | } | |
1339 | ||
eed0ef2c SW |
1340 | static int process_connect(struct ceph_connection *con) |
1341 | { | |
3d14c5d2 YS |
1342 | u64 sup_feat = con->msgr->supported_features; |
1343 | u64 req_feat = con->msgr->required_features; | |
04a419f9 | 1344 | u64 server_feat = le64_to_cpu(con->in_reply.features); |
0da5d703 | 1345 | int ret; |
04a419f9 | 1346 | |
eed0ef2c SW |
1347 | dout("process_connect on %p tag %d\n", con, (int)con->in_tag); |
1348 | ||
31b8006e | 1349 | switch (con->in_reply.tag) { |
04a419f9 SW |
1350 | case CEPH_MSGR_TAG_FEATURES: |
1351 | pr_err("%s%lld %s feature set mismatch," | |
1352 | " my %llx < server's %llx, missing %llx\n", | |
1353 | ENTITY_NAME(con->peer_name), | |
3d14c5d2 | 1354 | ceph_pr_addr(&con->peer_addr.in_addr), |
04a419f9 SW |
1355 | sup_feat, server_feat, server_feat & ~sup_feat); |
1356 | con->error_msg = "missing required protocol features"; | |
1357 | fail_protocol(con); | |
1358 | return -1; | |
1359 | ||
31b8006e | 1360 | case CEPH_MSGR_TAG_BADPROTOVER: |
31b8006e SW |
1361 | pr_err("%s%lld %s protocol version mismatch," |
1362 | " my %d != server's %d\n", | |
1363 | ENTITY_NAME(con->peer_name), | |
3d14c5d2 | 1364 | ceph_pr_addr(&con->peer_addr.in_addr), |
31b8006e SW |
1365 | le32_to_cpu(con->out_connect.protocol_version), |
1366 | le32_to_cpu(con->in_reply.protocol_version)); | |
1367 | con->error_msg = "protocol version mismatch"; | |
04a419f9 | 1368 | fail_protocol(con); |
31b8006e SW |
1369 | return -1; |
1370 | ||
4e7a5dcd SW |
1371 | case CEPH_MSGR_TAG_BADAUTHORIZER: |
1372 | con->auth_retry++; | |
1373 | dout("process_connect %p got BADAUTHORIZER attempt %d\n", con, | |
1374 | con->auth_retry); | |
1375 | if (con->auth_retry == 2) { | |
1376 | con->error_msg = "connect authorization failure"; | |
4e7a5dcd SW |
1377 | return -1; |
1378 | } | |
1379 | con->auth_retry = 1; | |
0da5d703 SW |
1380 | ret = prepare_write_connect(con->msgr, con, 0); |
1381 | if (ret < 0) | |
1382 | return ret; | |
63733a0f | 1383 | prepare_read_connect(con); |
4e7a5dcd | 1384 | break; |
31b8006e SW |
1385 | |
1386 | case CEPH_MSGR_TAG_RESETSESSION: | |
1387 | /* | |
1388 | * If we connected with a large connect_seq but the peer | |
1389 | * has no record of a session with us (no connection, or | |
1390 | * connect_seq == 0), they will send RESETSESION to indicate | |
1391 | * that they must have reset their session, and may have | |
1392 | * dropped messages. | |
1393 | */ | |
1394 | dout("process_connect got RESET peer seq %u\n", | |
1395 | le32_to_cpu(con->in_connect.connect_seq)); | |
1396 | pr_err("%s%lld %s connection reset\n", | |
1397 | ENTITY_NAME(con->peer_name), | |
3d14c5d2 | 1398 | ceph_pr_addr(&con->peer_addr.in_addr)); |
31b8006e | 1399 | reset_connection(con); |
eed0ef2c | 1400 | prepare_write_connect(con->msgr, con, 0); |
31b8006e SW |
1401 | prepare_read_connect(con); |
1402 | ||
1403 | /* Tell ceph about it. */ | |
ec302645 | 1404 | mutex_unlock(&con->mutex); |
31b8006e SW |
1405 | pr_info("reset on %s%lld\n", ENTITY_NAME(con->peer_name)); |
1406 | if (con->ops->peer_reset) | |
1407 | con->ops->peer_reset(con); | |
ec302645 | 1408 | mutex_lock(&con->mutex); |
0da5d703 SW |
1409 | if (test_bit(CLOSED, &con->state) || |
1410 | test_bit(OPENING, &con->state)) | |
1411 | return -EAGAIN; | |
31b8006e SW |
1412 | break; |
1413 | ||
1414 | case CEPH_MSGR_TAG_RETRY_SESSION: | |
1415 | /* | |
1416 | * If we sent a smaller connect_seq than the peer has, try | |
1417 | * again with a larger value. | |
1418 | */ | |
1419 | dout("process_connect got RETRY my seq = %u, peer_seq = %u\n", | |
1420 | le32_to_cpu(con->out_connect.connect_seq), | |
1421 | le32_to_cpu(con->in_connect.connect_seq)); | |
1422 | con->connect_seq = le32_to_cpu(con->in_connect.connect_seq); | |
eed0ef2c | 1423 | prepare_write_connect(con->msgr, con, 0); |
31b8006e SW |
1424 | prepare_read_connect(con); |
1425 | break; | |
1426 | ||
1427 | case CEPH_MSGR_TAG_RETRY_GLOBAL: | |
1428 | /* | |
1429 | * If we sent a smaller global_seq than the peer has, try | |
1430 | * again with a larger value. | |
1431 | */ | |
eed0ef2c | 1432 | dout("process_connect got RETRY_GLOBAL my %u peer_gseq %u\n", |
31b8006e SW |
1433 | con->peer_global_seq, |
1434 | le32_to_cpu(con->in_connect.global_seq)); | |
1435 | get_global_seq(con->msgr, | |
1436 | le32_to_cpu(con->in_connect.global_seq)); | |
eed0ef2c | 1437 | prepare_write_connect(con->msgr, con, 0); |
31b8006e SW |
1438 | prepare_read_connect(con); |
1439 | break; | |
1440 | ||
1441 | case CEPH_MSGR_TAG_READY: | |
04a419f9 SW |
1442 | if (req_feat & ~server_feat) { |
1443 | pr_err("%s%lld %s protocol feature mismatch," | |
1444 | " my required %llx > server's %llx, need %llx\n", | |
1445 | ENTITY_NAME(con->peer_name), | |
3d14c5d2 | 1446 | ceph_pr_addr(&con->peer_addr.in_addr), |
04a419f9 SW |
1447 | req_feat, server_feat, req_feat & ~server_feat); |
1448 | con->error_msg = "missing required protocol features"; | |
1449 | fail_protocol(con); | |
1450 | return -1; | |
1451 | } | |
31b8006e | 1452 | clear_bit(CONNECTING, &con->state); |
31b8006e SW |
1453 | con->peer_global_seq = le32_to_cpu(con->in_reply.global_seq); |
1454 | con->connect_seq++; | |
aba558e2 | 1455 | con->peer_features = server_feat; |
31b8006e SW |
1456 | dout("process_connect got READY gseq %d cseq %d (%d)\n", |
1457 | con->peer_global_seq, | |
1458 | le32_to_cpu(con->in_reply.connect_seq), | |
1459 | con->connect_seq); | |
1460 | WARN_ON(con->connect_seq != | |
1461 | le32_to_cpu(con->in_reply.connect_seq)); | |
92ac41d0 SW |
1462 | |
1463 | if (con->in_reply.flags & CEPH_MSG_CONNECT_LOSSY) | |
1464 | set_bit(LOSSYTX, &con->state); | |
1465 | ||
31b8006e SW |
1466 | prepare_read_tag(con); |
1467 | break; | |
1468 | ||
1469 | case CEPH_MSGR_TAG_WAIT: | |
1470 | /* | |
1471 | * If there is a connection race (we are opening | |
1472 | * connections to each other), one of us may just have | |
1473 | * to WAIT. This shouldn't happen if we are the | |
1474 | * client. | |
1475 | */ | |
04177882 SW |
1476 | pr_err("process_connect got WAIT as client\n"); |
1477 | con->error_msg = "protocol error, got WAIT as client"; | |
1478 | return -1; | |
31b8006e SW |
1479 | |
1480 | default: | |
1481 | pr_err("connect protocol error, will retry\n"); | |
1482 | con->error_msg = "protocol error, garbage tag during connect"; | |
1483 | return -1; | |
1484 | } | |
1485 | return 0; | |
1486 | } | |
1487 | ||
1488 | ||
1489 | /* | |
1490 | * read (part of) an ack | |
1491 | */ | |
1492 | static int read_partial_ack(struct ceph_connection *con) | |
1493 | { | |
1494 | int to = 0; | |
1495 | ||
1496 | return read_partial(con, &to, sizeof(con->in_temp_ack), | |
1497 | &con->in_temp_ack); | |
1498 | } | |
1499 | ||
1500 | ||
1501 | /* | |
1502 | * We can finally discard anything that's been acked. | |
1503 | */ | |
1504 | static void process_ack(struct ceph_connection *con) | |
1505 | { | |
1506 | struct ceph_msg *m; | |
1507 | u64 ack = le64_to_cpu(con->in_temp_ack); | |
1508 | u64 seq; | |
1509 | ||
31b8006e SW |
1510 | while (!list_empty(&con->out_sent)) { |
1511 | m = list_first_entry(&con->out_sent, struct ceph_msg, | |
1512 | list_head); | |
1513 | seq = le64_to_cpu(m->hdr.seq); | |
1514 | if (seq > ack) | |
1515 | break; | |
1516 | dout("got ack for seq %llu type %d at %p\n", seq, | |
1517 | le16_to_cpu(m->hdr.type), m); | |
4cf9d544 | 1518 | m->ack_stamp = jiffies; |
31b8006e SW |
1519 | ceph_msg_remove(m); |
1520 | } | |
31b8006e SW |
1521 | prepare_read_tag(con); |
1522 | } | |
1523 | ||
1524 | ||
1525 | ||
1526 | ||
2450418c | 1527 | static int read_partial_message_section(struct ceph_connection *con, |
213c99ee SW |
1528 | struct kvec *section, |
1529 | unsigned int sec_len, u32 *crc) | |
2450418c | 1530 | { |
68b4476b | 1531 | int ret, left; |
2450418c YS |
1532 | |
1533 | BUG_ON(!section); | |
1534 | ||
1535 | while (section->iov_len < sec_len) { | |
1536 | BUG_ON(section->iov_base == NULL); | |
1537 | left = sec_len - section->iov_len; | |
1538 | ret = ceph_tcp_recvmsg(con->sock, (char *)section->iov_base + | |
1539 | section->iov_len, left); | |
1540 | if (ret <= 0) | |
1541 | return ret; | |
1542 | section->iov_len += ret; | |
1543 | if (section->iov_len == sec_len) | |
1544 | *crc = crc32c(0, section->iov_base, | |
1545 | section->iov_len); | |
1546 | } | |
31b8006e | 1547 | |
2450418c YS |
1548 | return 1; |
1549 | } | |
31b8006e | 1550 | |
2450418c YS |
1551 | static struct ceph_msg *ceph_alloc_msg(struct ceph_connection *con, |
1552 | struct ceph_msg_header *hdr, | |
1553 | int *skip); | |
68b4476b YS |
1554 | |
1555 | ||
1556 | static int read_partial_message_pages(struct ceph_connection *con, | |
1557 | struct page **pages, | |
1558 | unsigned data_len, int datacrc) | |
1559 | { | |
1560 | void *p; | |
1561 | int ret; | |
1562 | int left; | |
1563 | ||
1564 | left = min((int)(data_len - con->in_msg_pos.data_pos), | |
1565 | (int)(PAGE_SIZE - con->in_msg_pos.page_pos)); | |
1566 | /* (page) data */ | |
1567 | BUG_ON(pages == NULL); | |
1568 | p = kmap(pages[con->in_msg_pos.page]); | |
1569 | ret = ceph_tcp_recvmsg(con->sock, p + con->in_msg_pos.page_pos, | |
1570 | left); | |
1571 | if (ret > 0 && datacrc) | |
1572 | con->in_data_crc = | |
1573 | crc32c(con->in_data_crc, | |
1574 | p + con->in_msg_pos.page_pos, ret); | |
1575 | kunmap(pages[con->in_msg_pos.page]); | |
1576 | if (ret <= 0) | |
1577 | return ret; | |
1578 | con->in_msg_pos.data_pos += ret; | |
1579 | con->in_msg_pos.page_pos += ret; | |
1580 | if (con->in_msg_pos.page_pos == PAGE_SIZE) { | |
1581 | con->in_msg_pos.page_pos = 0; | |
1582 | con->in_msg_pos.page++; | |
1583 | } | |
1584 | ||
1585 | return ret; | |
1586 | } | |
1587 | ||
1588 | #ifdef CONFIG_BLOCK | |
1589 | static int read_partial_message_bio(struct ceph_connection *con, | |
1590 | struct bio **bio_iter, int *bio_seg, | |
1591 | unsigned data_len, int datacrc) | |
1592 | { | |
1593 | struct bio_vec *bv = bio_iovec_idx(*bio_iter, *bio_seg); | |
1594 | void *p; | |
1595 | int ret, left; | |
1596 | ||
1597 | if (IS_ERR(bv)) | |
1598 | return PTR_ERR(bv); | |
1599 | ||
1600 | left = min((int)(data_len - con->in_msg_pos.data_pos), | |
1601 | (int)(bv->bv_len - con->in_msg_pos.page_pos)); | |
1602 | ||
1603 | p = kmap(bv->bv_page) + bv->bv_offset; | |
1604 | ||
1605 | ret = ceph_tcp_recvmsg(con->sock, p + con->in_msg_pos.page_pos, | |
1606 | left); | |
1607 | if (ret > 0 && datacrc) | |
1608 | con->in_data_crc = | |
1609 | crc32c(con->in_data_crc, | |
1610 | p + con->in_msg_pos.page_pos, ret); | |
1611 | kunmap(bv->bv_page); | |
1612 | if (ret <= 0) | |
1613 | return ret; | |
1614 | con->in_msg_pos.data_pos += ret; | |
1615 | con->in_msg_pos.page_pos += ret; | |
1616 | if (con->in_msg_pos.page_pos == bv->bv_len) { | |
1617 | con->in_msg_pos.page_pos = 0; | |
1618 | iter_bio_next(bio_iter, bio_seg); | |
1619 | } | |
1620 | ||
1621 | return ret; | |
1622 | } | |
1623 | #endif | |
1624 | ||
31b8006e SW |
1625 | /* |
1626 | * read (part of) a message. | |
1627 | */ | |
1628 | static int read_partial_message(struct ceph_connection *con) | |
1629 | { | |
1630 | struct ceph_msg *m = con->in_msg; | |
31b8006e | 1631 | int ret; |
9d7f0f13 | 1632 | int to, left; |
c5c6b19d | 1633 | unsigned front_len, middle_len, data_len; |
31b8006e | 1634 | int datacrc = con->msgr->nocrc; |
2450418c | 1635 | int skip; |
ae18756b | 1636 | u64 seq; |
31b8006e SW |
1637 | |
1638 | dout("read_partial_message con %p msg %p\n", con, m); | |
1639 | ||
1640 | /* header */ | |
1641 | while (con->in_base_pos < sizeof(con->in_hdr)) { | |
1642 | left = sizeof(con->in_hdr) - con->in_base_pos; | |
1643 | ret = ceph_tcp_recvmsg(con->sock, | |
1644 | (char *)&con->in_hdr + con->in_base_pos, | |
1645 | left); | |
1646 | if (ret <= 0) | |
1647 | return ret; | |
1648 | con->in_base_pos += ret; | |
1649 | if (con->in_base_pos == sizeof(con->in_hdr)) { | |
1650 | u32 crc = crc32c(0, (void *)&con->in_hdr, | |
1651 | sizeof(con->in_hdr) - sizeof(con->in_hdr.crc)); | |
1652 | if (crc != le32_to_cpu(con->in_hdr.crc)) { | |
1653 | pr_err("read_partial_message bad hdr " | |
1654 | " crc %u != expected %u\n", | |
1655 | crc, con->in_hdr.crc); | |
1656 | return -EBADMSG; | |
1657 | } | |
1658 | } | |
1659 | } | |
31b8006e SW |
1660 | front_len = le32_to_cpu(con->in_hdr.front_len); |
1661 | if (front_len > CEPH_MSG_MAX_FRONT_LEN) | |
1662 | return -EIO; | |
1663 | middle_len = le32_to_cpu(con->in_hdr.middle_len); | |
1664 | if (middle_len > CEPH_MSG_MAX_DATA_LEN) | |
1665 | return -EIO; | |
1666 | data_len = le32_to_cpu(con->in_hdr.data_len); | |
1667 | if (data_len > CEPH_MSG_MAX_DATA_LEN) | |
1668 | return -EIO; | |
1669 | ||
ae18756b SW |
1670 | /* verify seq# */ |
1671 | seq = le64_to_cpu(con->in_hdr.seq); | |
1672 | if ((s64)seq - (s64)con->in_seq < 1) { | |
df9f86fa | 1673 | pr_info("skipping %s%lld %s seq %lld expected %lld\n", |
ae18756b | 1674 | ENTITY_NAME(con->peer_name), |
3d14c5d2 | 1675 | ceph_pr_addr(&con->peer_addr.in_addr), |
ae18756b SW |
1676 | seq, con->in_seq + 1); |
1677 | con->in_base_pos = -front_len - middle_len - data_len - | |
1678 | sizeof(m->footer); | |
1679 | con->in_tag = CEPH_MSGR_TAG_READY; | |
ae18756b SW |
1680 | return 0; |
1681 | } else if ((s64)seq - (s64)con->in_seq > 1) { | |
1682 | pr_err("read_partial_message bad seq %lld expected %lld\n", | |
1683 | seq, con->in_seq + 1); | |
1684 | con->error_msg = "bad message sequence # for incoming message"; | |
1685 | return -EBADMSG; | |
1686 | } | |
1687 | ||
31b8006e SW |
1688 | /* allocate message? */ |
1689 | if (!con->in_msg) { | |
1690 | dout("got hdr type %d front %d data %d\n", con->in_hdr.type, | |
1691 | con->in_hdr.front_len, con->in_hdr.data_len); | |
ae32be31 | 1692 | skip = 0; |
2450418c YS |
1693 | con->in_msg = ceph_alloc_msg(con, &con->in_hdr, &skip); |
1694 | if (skip) { | |
31b8006e | 1695 | /* skip this message */ |
a79832f2 | 1696 | dout("alloc_msg said skip message\n"); |
ae32be31 | 1697 | BUG_ON(con->in_msg); |
31b8006e SW |
1698 | con->in_base_pos = -front_len - middle_len - data_len - |
1699 | sizeof(m->footer); | |
1700 | con->in_tag = CEPH_MSGR_TAG_READY; | |
684be25c | 1701 | con->in_seq++; |
31b8006e SW |
1702 | return 0; |
1703 | } | |
a79832f2 | 1704 | if (!con->in_msg) { |
5b3a4db3 SW |
1705 | con->error_msg = |
1706 | "error allocating memory for incoming message"; | |
a79832f2 | 1707 | return -ENOMEM; |
31b8006e SW |
1708 | } |
1709 | m = con->in_msg; | |
1710 | m->front.iov_len = 0; /* haven't read it yet */ | |
2450418c YS |
1711 | if (m->middle) |
1712 | m->middle->vec.iov_len = 0; | |
9d7f0f13 YS |
1713 | |
1714 | con->in_msg_pos.page = 0; | |
68b4476b | 1715 | if (m->pages) |
c5c6b19d | 1716 | con->in_msg_pos.page_pos = m->page_alignment; |
68b4476b YS |
1717 | else |
1718 | con->in_msg_pos.page_pos = 0; | |
9d7f0f13 | 1719 | con->in_msg_pos.data_pos = 0; |
31b8006e SW |
1720 | } |
1721 | ||
1722 | /* front */ | |
2450418c YS |
1723 | ret = read_partial_message_section(con, &m->front, front_len, |
1724 | &con->in_front_crc); | |
1725 | if (ret <= 0) | |
1726 | return ret; | |
31b8006e SW |
1727 | |
1728 | /* middle */ | |
2450418c | 1729 | if (m->middle) { |
213c99ee SW |
1730 | ret = read_partial_message_section(con, &m->middle->vec, |
1731 | middle_len, | |
2450418c | 1732 | &con->in_middle_crc); |
31b8006e SW |
1733 | if (ret <= 0) |
1734 | return ret; | |
31b8006e | 1735 | } |
68b4476b YS |
1736 | #ifdef CONFIG_BLOCK |
1737 | if (m->bio && !m->bio_iter) | |
1738 | init_bio_iter(m->bio, &m->bio_iter, &m->bio_seg); | |
1739 | #endif | |
31b8006e SW |
1740 | |
1741 | /* (page) data */ | |
31b8006e | 1742 | while (con->in_msg_pos.data_pos < data_len) { |
68b4476b YS |
1743 | if (m->pages) { |
1744 | ret = read_partial_message_pages(con, m->pages, | |
1745 | data_len, datacrc); | |
1746 | if (ret <= 0) | |
1747 | return ret; | |
1748 | #ifdef CONFIG_BLOCK | |
1749 | } else if (m->bio) { | |
1750 | ||
1751 | ret = read_partial_message_bio(con, | |
1752 | &m->bio_iter, &m->bio_seg, | |
1753 | data_len, datacrc); | |
1754 | if (ret <= 0) | |
1755 | return ret; | |
1756 | #endif | |
1757 | } else { | |
1758 | BUG_ON(1); | |
31b8006e SW |
1759 | } |
1760 | } | |
1761 | ||
31b8006e SW |
1762 | /* footer */ |
1763 | to = sizeof(m->hdr) + sizeof(m->footer); | |
1764 | while (con->in_base_pos < to) { | |
1765 | left = to - con->in_base_pos; | |
1766 | ret = ceph_tcp_recvmsg(con->sock, (char *)&m->footer + | |
1767 | (con->in_base_pos - sizeof(m->hdr)), | |
1768 | left); | |
1769 | if (ret <= 0) | |
1770 | return ret; | |
1771 | con->in_base_pos += ret; | |
1772 | } | |
1773 | dout("read_partial_message got msg %p %d (%u) + %d (%u) + %d (%u)\n", | |
1774 | m, front_len, m->footer.front_crc, middle_len, | |
1775 | m->footer.middle_crc, data_len, m->footer.data_crc); | |
1776 | ||
1777 | /* crc ok? */ | |
1778 | if (con->in_front_crc != le32_to_cpu(m->footer.front_crc)) { | |
1779 | pr_err("read_partial_message %p front crc %u != exp. %u\n", | |
1780 | m, con->in_front_crc, m->footer.front_crc); | |
1781 | return -EBADMSG; | |
1782 | } | |
1783 | if (con->in_middle_crc != le32_to_cpu(m->footer.middle_crc)) { | |
1784 | pr_err("read_partial_message %p middle crc %u != exp %u\n", | |
1785 | m, con->in_middle_crc, m->footer.middle_crc); | |
1786 | return -EBADMSG; | |
1787 | } | |
1788 | if (datacrc && | |
1789 | (m->footer.flags & CEPH_MSG_FOOTER_NOCRC) == 0 && | |
1790 | con->in_data_crc != le32_to_cpu(m->footer.data_crc)) { | |
1791 | pr_err("read_partial_message %p data crc %u != exp. %u\n", m, | |
1792 | con->in_data_crc, le32_to_cpu(m->footer.data_crc)); | |
1793 | return -EBADMSG; | |
1794 | } | |
1795 | ||
1796 | return 1; /* done! */ | |
1797 | } | |
1798 | ||
1799 | /* | |
1800 | * Process message. This happens in the worker thread. The callback should | |
1801 | * be careful not to do anything that waits on other incoming messages or it | |
1802 | * may deadlock. | |
1803 | */ | |
1804 | static void process_message(struct ceph_connection *con) | |
1805 | { | |
5e095e8b | 1806 | struct ceph_msg *msg; |
31b8006e | 1807 | |
5e095e8b | 1808 | msg = con->in_msg; |
31b8006e SW |
1809 | con->in_msg = NULL; |
1810 | ||
1811 | /* if first message, set peer_name */ | |
1812 | if (con->peer_name.type == 0) | |
dbad185d | 1813 | con->peer_name = msg->hdr.src; |
31b8006e | 1814 | |
31b8006e | 1815 | con->in_seq++; |
ec302645 | 1816 | mutex_unlock(&con->mutex); |
31b8006e SW |
1817 | |
1818 | dout("===== %p %llu from %s%lld %d=%s len %d+%d (%u %u %u) =====\n", | |
1819 | msg, le64_to_cpu(msg->hdr.seq), | |
dbad185d | 1820 | ENTITY_NAME(msg->hdr.src), |
31b8006e SW |
1821 | le16_to_cpu(msg->hdr.type), |
1822 | ceph_msg_type_name(le16_to_cpu(msg->hdr.type)), | |
1823 | le32_to_cpu(msg->hdr.front_len), | |
1824 | le32_to_cpu(msg->hdr.data_len), | |
1825 | con->in_front_crc, con->in_middle_crc, con->in_data_crc); | |
1826 | con->ops->dispatch(con, msg); | |
ec302645 SW |
1827 | |
1828 | mutex_lock(&con->mutex); | |
31b8006e SW |
1829 | prepare_read_tag(con); |
1830 | } | |
1831 | ||
1832 | ||
1833 | /* | |
1834 | * Write something to the socket. Called in a worker thread when the | |
1835 | * socket appears to be writeable and we have something ready to send. | |
1836 | */ | |
1837 | static int try_write(struct ceph_connection *con) | |
1838 | { | |
1839 | struct ceph_messenger *msgr = con->msgr; | |
1840 | int ret = 1; | |
1841 | ||
1842 | dout("try_write start %p state %lu nref %d\n", con, con->state, | |
1843 | atomic_read(&con->nref)); | |
1844 | ||
31b8006e SW |
1845 | more: |
1846 | dout("try_write out_kvec_bytes %d\n", con->out_kvec_bytes); | |
1847 | ||
1848 | /* open the socket first? */ | |
1849 | if (con->sock == NULL) { | |
eed0ef2c SW |
1850 | prepare_write_banner(msgr, con); |
1851 | prepare_write_connect(msgr, con, 1); | |
1852 | prepare_read_banner(con); | |
31b8006e | 1853 | set_bit(CONNECTING, &con->state); |
eed0ef2c | 1854 | clear_bit(NEGOTIATING, &con->state); |
31b8006e | 1855 | |
cf3e5c40 | 1856 | BUG_ON(con->in_msg); |
31b8006e SW |
1857 | con->in_tag = CEPH_MSGR_TAG_READY; |
1858 | dout("try_write initiating connect on %p new state %lu\n", | |
1859 | con, con->state); | |
1860 | con->sock = ceph_tcp_connect(con); | |
1861 | if (IS_ERR(con->sock)) { | |
1862 | con->sock = NULL; | |
1863 | con->error_msg = "connect error"; | |
1864 | ret = -1; | |
1865 | goto out; | |
1866 | } | |
1867 | } | |
1868 | ||
1869 | more_kvec: | |
1870 | /* kvec data queued? */ | |
1871 | if (con->out_skip) { | |
1872 | ret = write_partial_skip(con); | |
1873 | if (ret <= 0) | |
42961d23 | 1874 | goto out; |
31b8006e SW |
1875 | } |
1876 | if (con->out_kvec_left) { | |
1877 | ret = write_partial_kvec(con); | |
1878 | if (ret <= 0) | |
42961d23 | 1879 | goto out; |
31b8006e SW |
1880 | } |
1881 | ||
1882 | /* msg pages? */ | |
1883 | if (con->out_msg) { | |
c86a2930 SW |
1884 | if (con->out_msg_done) { |
1885 | ceph_msg_put(con->out_msg); | |
1886 | con->out_msg = NULL; /* we're done with this one */ | |
1887 | goto do_next; | |
1888 | } | |
1889 | ||
31b8006e SW |
1890 | ret = write_partial_msg_pages(con); |
1891 | if (ret == 1) | |
1892 | goto more_kvec; /* we need to send the footer, too! */ | |
1893 | if (ret == 0) | |
42961d23 | 1894 | goto out; |
31b8006e SW |
1895 | if (ret < 0) { |
1896 | dout("try_write write_partial_msg_pages err %d\n", | |
1897 | ret); | |
42961d23 | 1898 | goto out; |
31b8006e SW |
1899 | } |
1900 | } | |
1901 | ||
c86a2930 | 1902 | do_next: |
31b8006e SW |
1903 | if (!test_bit(CONNECTING, &con->state)) { |
1904 | /* is anything else pending? */ | |
1905 | if (!list_empty(&con->out_queue)) { | |
1906 | prepare_write_message(con); | |
1907 | goto more; | |
1908 | } | |
1909 | if (con->in_seq > con->in_seq_acked) { | |
1910 | prepare_write_ack(con); | |
1911 | goto more; | |
1912 | } | |
1913 | if (test_and_clear_bit(KEEPALIVE_PENDING, &con->state)) { | |
1914 | prepare_write_keepalive(con); | |
1915 | goto more; | |
1916 | } | |
1917 | } | |
1918 | ||
1919 | /* Nothing to do! */ | |
1920 | clear_bit(WRITE_PENDING, &con->state); | |
1921 | dout("try_write nothing else to write.\n"); | |
31b8006e SW |
1922 | ret = 0; |
1923 | out: | |
42961d23 | 1924 | dout("try_write done on %p ret %d\n", con, ret); |
31b8006e SW |
1925 | return ret; |
1926 | } | |
1927 | ||
1928 | ||
1929 | ||
1930 | /* | |
1931 | * Read what we can from the socket. | |
1932 | */ | |
1933 | static int try_read(struct ceph_connection *con) | |
1934 | { | |
31b8006e SW |
1935 | int ret = -1; |
1936 | ||
1937 | if (!con->sock) | |
1938 | return 0; | |
1939 | ||
1940 | if (test_bit(STANDBY, &con->state)) | |
1941 | return 0; | |
1942 | ||
1943 | dout("try_read start on %p\n", con); | |
ec302645 | 1944 | |
31b8006e SW |
1945 | more: |
1946 | dout("try_read tag %d in_base_pos %d\n", (int)con->in_tag, | |
1947 | con->in_base_pos); | |
0da5d703 SW |
1948 | |
1949 | /* | |
1950 | * process_connect and process_message drop and re-take | |
1951 | * con->mutex. make sure we handle a racing close or reopen. | |
1952 | */ | |
1953 | if (test_bit(CLOSED, &con->state) || | |
1954 | test_bit(OPENING, &con->state)) { | |
1955 | ret = -EAGAIN; | |
1956 | goto out; | |
1957 | } | |
1958 | ||
31b8006e | 1959 | if (test_bit(CONNECTING, &con->state)) { |
eed0ef2c SW |
1960 | if (!test_bit(NEGOTIATING, &con->state)) { |
1961 | dout("try_read connecting\n"); | |
1962 | ret = read_partial_banner(con); | |
1963 | if (ret <= 0) | |
eed0ef2c | 1964 | goto out; |
98bdb0aa SW |
1965 | ret = process_banner(con); |
1966 | if (ret < 0) | |
1967 | goto out; | |
eed0ef2c | 1968 | } |
31b8006e SW |
1969 | ret = read_partial_connect(con); |
1970 | if (ret <= 0) | |
31b8006e | 1971 | goto out; |
98bdb0aa SW |
1972 | ret = process_connect(con); |
1973 | if (ret < 0) | |
1974 | goto out; | |
31b8006e SW |
1975 | goto more; |
1976 | } | |
1977 | ||
1978 | if (con->in_base_pos < 0) { | |
1979 | /* | |
1980 | * skipping + discarding content. | |
1981 | * | |
1982 | * FIXME: there must be a better way to do this! | |
1983 | */ | |
1984 | static char buf[1024]; | |
1985 | int skip = min(1024, -con->in_base_pos); | |
1986 | dout("skipping %d / %d bytes\n", skip, -con->in_base_pos); | |
1987 | ret = ceph_tcp_recvmsg(con->sock, buf, skip); | |
1988 | if (ret <= 0) | |
98bdb0aa | 1989 | goto out; |
31b8006e SW |
1990 | con->in_base_pos += ret; |
1991 | if (con->in_base_pos) | |
1992 | goto more; | |
1993 | } | |
1994 | if (con->in_tag == CEPH_MSGR_TAG_READY) { | |
1995 | /* | |
1996 | * what's next? | |
1997 | */ | |
1998 | ret = ceph_tcp_recvmsg(con->sock, &con->in_tag, 1); | |
1999 | if (ret <= 0) | |
98bdb0aa | 2000 | goto out; |
31b8006e SW |
2001 | dout("try_read got tag %d\n", (int)con->in_tag); |
2002 | switch (con->in_tag) { | |
2003 | case CEPH_MSGR_TAG_MSG: | |
2004 | prepare_read_message(con); | |
2005 | break; | |
2006 | case CEPH_MSGR_TAG_ACK: | |
2007 | prepare_read_ack(con); | |
2008 | break; | |
2009 | case CEPH_MSGR_TAG_CLOSE: | |
2010 | set_bit(CLOSED, &con->state); /* fixme */ | |
98bdb0aa | 2011 | goto out; |
31b8006e SW |
2012 | default: |
2013 | goto bad_tag; | |
2014 | } | |
2015 | } | |
2016 | if (con->in_tag == CEPH_MSGR_TAG_MSG) { | |
2017 | ret = read_partial_message(con); | |
2018 | if (ret <= 0) { | |
2019 | switch (ret) { | |
2020 | case -EBADMSG: | |
2021 | con->error_msg = "bad crc"; | |
2022 | ret = -EIO; | |
98bdb0aa | 2023 | break; |
31b8006e SW |
2024 | case -EIO: |
2025 | con->error_msg = "io error"; | |
98bdb0aa | 2026 | break; |
31b8006e | 2027 | } |
98bdb0aa | 2028 | goto out; |
31b8006e SW |
2029 | } |
2030 | if (con->in_tag == CEPH_MSGR_TAG_READY) | |
2031 | goto more; | |
2032 | process_message(con); | |
2033 | goto more; | |
2034 | } | |
2035 | if (con->in_tag == CEPH_MSGR_TAG_ACK) { | |
2036 | ret = read_partial_ack(con); | |
2037 | if (ret <= 0) | |
98bdb0aa | 2038 | goto out; |
31b8006e SW |
2039 | process_ack(con); |
2040 | goto more; | |
2041 | } | |
2042 | ||
31b8006e | 2043 | out: |
98bdb0aa | 2044 | dout("try_read done on %p ret %d\n", con, ret); |
31b8006e SW |
2045 | return ret; |
2046 | ||
2047 | bad_tag: | |
2048 | pr_err("try_read bad con->in_tag = %d\n", (int)con->in_tag); | |
2049 | con->error_msg = "protocol error, garbage tag"; | |
2050 | ret = -1; | |
2051 | goto out; | |
2052 | } | |
2053 | ||
2054 | ||
2055 | /* | |
2056 | * Atomically queue work on a connection. Bump @con reference to | |
2057 | * avoid races with connection teardown. | |
31b8006e SW |
2058 | */ |
2059 | static void queue_con(struct ceph_connection *con) | |
2060 | { | |
2061 | if (test_bit(DEAD, &con->state)) { | |
2062 | dout("queue_con %p ignoring: DEAD\n", | |
2063 | con); | |
2064 | return; | |
2065 | } | |
2066 | ||
2067 | if (!con->ops->get(con)) { | |
2068 | dout("queue_con %p ref count 0\n", con); | |
2069 | return; | |
2070 | } | |
2071 | ||
f363e45f | 2072 | if (!queue_delayed_work(ceph_msgr_wq, &con->work, 0)) { |
31b8006e SW |
2073 | dout("queue_con %p - already queued\n", con); |
2074 | con->ops->put(con); | |
2075 | } else { | |
2076 | dout("queue_con %p\n", con); | |
2077 | } | |
2078 | } | |
2079 | ||
2080 | /* | |
2081 | * Do some work on a connection. Drop a connection ref when we're done. | |
2082 | */ | |
2083 | static void con_work(struct work_struct *work) | |
2084 | { | |
2085 | struct ceph_connection *con = container_of(work, struct ceph_connection, | |
2086 | work.work); | |
0da5d703 | 2087 | int ret; |
31b8006e | 2088 | |
9dd4658d | 2089 | mutex_lock(&con->mutex); |
0da5d703 | 2090 | restart: |
60bf8bf8 SW |
2091 | if (test_and_clear_bit(BACKOFF, &con->state)) { |
2092 | dout("con_work %p backing off\n", con); | |
2093 | if (queue_delayed_work(ceph_msgr_wq, &con->work, | |
2094 | round_jiffies_relative(con->delay))) { | |
2095 | dout("con_work %p backoff %lu\n", con, con->delay); | |
2096 | mutex_unlock(&con->mutex); | |
2097 | return; | |
2098 | } else { | |
2099 | con->ops->put(con); | |
2100 | dout("con_work %p FAILED to back off %lu\n", con, | |
2101 | con->delay); | |
2102 | } | |
2103 | } | |
9dd4658d | 2104 | |
e00de341 SW |
2105 | if (test_bit(STANDBY, &con->state)) { |
2106 | dout("con_work %p STANDBY\n", con); | |
2107 | goto done; | |
2108 | } | |
31b8006e SW |
2109 | if (test_bit(CLOSED, &con->state)) { /* e.g. if we are replaced */ |
2110 | dout("con_work CLOSED\n"); | |
2111 | con_close_socket(con); | |
2112 | goto done; | |
2113 | } | |
2114 | if (test_and_clear_bit(OPENING, &con->state)) { | |
2115 | /* reopen w/ new peer */ | |
2116 | dout("con_work OPENING\n"); | |
2117 | con_close_socket(con); | |
2118 | } | |
2119 | ||
0da5d703 SW |
2120 | if (test_and_clear_bit(SOCK_CLOSED, &con->state)) |
2121 | goto fault; | |
2122 | ||
2123 | ret = try_read(con); | |
2124 | if (ret == -EAGAIN) | |
2125 | goto restart; | |
2126 | if (ret < 0) | |
2127 | goto fault; | |
2128 | ||
2129 | ret = try_write(con); | |
2130 | if (ret == -EAGAIN) | |
2131 | goto restart; | |
2132 | if (ret < 0) | |
2133 | goto fault; | |
31b8006e SW |
2134 | |
2135 | done: | |
9dd4658d | 2136 | mutex_unlock(&con->mutex); |
9dd4658d | 2137 | done_unlocked: |
31b8006e | 2138 | con->ops->put(con); |
0da5d703 SW |
2139 | return; |
2140 | ||
2141 | fault: | |
2142 | mutex_unlock(&con->mutex); | |
2143 | ceph_fault(con); /* error/fault path */ | |
2144 | goto done_unlocked; | |
31b8006e SW |
2145 | } |
2146 | ||
2147 | ||
2148 | /* | |
2149 | * Generic error/fault handler. A retry mechanism is used with | |
2150 | * exponential backoff | |
2151 | */ | |
2152 | static void ceph_fault(struct ceph_connection *con) | |
2153 | { | |
2154 | pr_err("%s%lld %s %s\n", ENTITY_NAME(con->peer_name), | |
3d14c5d2 | 2155 | ceph_pr_addr(&con->peer_addr.in_addr), con->error_msg); |
31b8006e | 2156 | dout("fault %p state %lu to peer %s\n", |
3d14c5d2 | 2157 | con, con->state, ceph_pr_addr(&con->peer_addr.in_addr)); |
31b8006e SW |
2158 | |
2159 | if (test_bit(LOSSYTX, &con->state)) { | |
2160 | dout("fault on LOSSYTX channel\n"); | |
2161 | goto out; | |
2162 | } | |
2163 | ||
ec302645 | 2164 | mutex_lock(&con->mutex); |
91e45ce3 SW |
2165 | if (test_bit(CLOSED, &con->state)) |
2166 | goto out_unlock; | |
ec302645 | 2167 | |
31b8006e | 2168 | con_close_socket(con); |
5e095e8b SW |
2169 | |
2170 | if (con->in_msg) { | |
2171 | ceph_msg_put(con->in_msg); | |
2172 | con->in_msg = NULL; | |
2173 | } | |
31b8006e | 2174 | |
e80a52d1 SW |
2175 | /* Requeue anything that hasn't been acked */ |
2176 | list_splice_init(&con->out_sent, &con->out_queue); | |
9bd2e6f8 | 2177 | |
e76661d0 SW |
2178 | /* If there are no messages queued or keepalive pending, place |
2179 | * the connection in a STANDBY state */ | |
2180 | if (list_empty(&con->out_queue) && | |
2181 | !test_bit(KEEPALIVE_PENDING, &con->state)) { | |
e00de341 SW |
2182 | dout("fault %p setting STANDBY clearing WRITE_PENDING\n", con); |
2183 | clear_bit(WRITE_PENDING, &con->state); | |
31b8006e | 2184 | set_bit(STANDBY, &con->state); |
e80a52d1 SW |
2185 | } else { |
2186 | /* retry after a delay. */ | |
2187 | if (con->delay == 0) | |
2188 | con->delay = BASE_DELAY_INTERVAL; | |
2189 | else if (con->delay < MAX_DELAY_INTERVAL) | |
2190 | con->delay *= 2; | |
e80a52d1 SW |
2191 | con->ops->get(con); |
2192 | if (queue_delayed_work(ceph_msgr_wq, &con->work, | |
60bf8bf8 SW |
2193 | round_jiffies_relative(con->delay))) { |
2194 | dout("fault queued %p delay %lu\n", con, con->delay); | |
2195 | } else { | |
e80a52d1 | 2196 | con->ops->put(con); |
60bf8bf8 SW |
2197 | dout("fault failed to queue %p delay %lu, backoff\n", |
2198 | con, con->delay); | |
2199 | /* | |
2200 | * In many cases we see a socket state change | |
2201 | * while con_work is running and end up | |
2202 | * queuing (non-delayed) work, such that we | |
2203 | * can't backoff with a delay. Set a flag so | |
2204 | * that when con_work restarts we schedule the | |
2205 | * delay then. | |
2206 | */ | |
2207 | set_bit(BACKOFF, &con->state); | |
2208 | } | |
31b8006e SW |
2209 | } |
2210 | ||
91e45ce3 SW |
2211 | out_unlock: |
2212 | mutex_unlock(&con->mutex); | |
31b8006e | 2213 | out: |
161fd65a SW |
2214 | /* |
2215 | * in case we faulted due to authentication, invalidate our | |
2216 | * current tickets so that we can get new ones. | |
213c99ee | 2217 | */ |
161fd65a SW |
2218 | if (con->auth_retry && con->ops->invalidate_authorizer) { |
2219 | dout("calling invalidate_authorizer()\n"); | |
2220 | con->ops->invalidate_authorizer(con); | |
2221 | } | |
2222 | ||
31b8006e SW |
2223 | if (con->ops->fault) |
2224 | con->ops->fault(con); | |
2225 | } | |
2226 | ||
2227 | ||
2228 | ||
2229 | /* | |
2230 | * create a new messenger instance | |
2231 | */ | |
3d14c5d2 YS |
2232 | struct ceph_messenger *ceph_messenger_create(struct ceph_entity_addr *myaddr, |
2233 | u32 supported_features, | |
2234 | u32 required_features) | |
31b8006e SW |
2235 | { |
2236 | struct ceph_messenger *msgr; | |
2237 | ||
2238 | msgr = kzalloc(sizeof(*msgr), GFP_KERNEL); | |
2239 | if (msgr == NULL) | |
2240 | return ERR_PTR(-ENOMEM); | |
2241 | ||
3d14c5d2 YS |
2242 | msgr->supported_features = supported_features; |
2243 | msgr->required_features = required_features; | |
2244 | ||
31b8006e SW |
2245 | spin_lock_init(&msgr->global_seq_lock); |
2246 | ||
31b8006e SW |
2247 | if (myaddr) |
2248 | msgr->inst.addr = *myaddr; | |
2249 | ||
2250 | /* select a random nonce */ | |
ac8839d7 | 2251 | msgr->inst.addr.type = 0; |
103e2d3a | 2252 | get_random_bytes(&msgr->inst.addr.nonce, sizeof(msgr->inst.addr.nonce)); |
63f2d211 | 2253 | encode_my_addr(msgr); |
31b8006e SW |
2254 | |
2255 | dout("messenger_create %p\n", msgr); | |
2256 | return msgr; | |
2257 | } | |
3d14c5d2 | 2258 | EXPORT_SYMBOL(ceph_messenger_create); |
31b8006e SW |
2259 | |
2260 | void ceph_messenger_destroy(struct ceph_messenger *msgr) | |
2261 | { | |
2262 | dout("destroy %p\n", msgr); | |
31b8006e SW |
2263 | kfree(msgr); |
2264 | dout("destroyed messenger %p\n", msgr); | |
2265 | } | |
3d14c5d2 | 2266 | EXPORT_SYMBOL(ceph_messenger_destroy); |
31b8006e | 2267 | |
e00de341 SW |
2268 | static void clear_standby(struct ceph_connection *con) |
2269 | { | |
2270 | /* come back from STANDBY? */ | |
2271 | if (test_and_clear_bit(STANDBY, &con->state)) { | |
2272 | mutex_lock(&con->mutex); | |
2273 | dout("clear_standby %p and ++connect_seq\n", con); | |
2274 | con->connect_seq++; | |
2275 | WARN_ON(test_bit(WRITE_PENDING, &con->state)); | |
2276 | WARN_ON(test_bit(KEEPALIVE_PENDING, &con->state)); | |
2277 | mutex_unlock(&con->mutex); | |
2278 | } | |
2279 | } | |
2280 | ||
31b8006e SW |
2281 | /* |
2282 | * Queue up an outgoing message on the given connection. | |
2283 | */ | |
2284 | void ceph_con_send(struct ceph_connection *con, struct ceph_msg *msg) | |
2285 | { | |
2286 | if (test_bit(CLOSED, &con->state)) { | |
2287 | dout("con_send %p closed, dropping %p\n", con, msg); | |
2288 | ceph_msg_put(msg); | |
2289 | return; | |
2290 | } | |
2291 | ||
2292 | /* set src+dst */ | |
dbad185d | 2293 | msg->hdr.src = con->msgr->inst.name; |
31b8006e | 2294 | |
3ca02ef9 SW |
2295 | BUG_ON(msg->front.iov_len != le32_to_cpu(msg->hdr.front_len)); |
2296 | ||
e84346b7 SW |
2297 | msg->needs_out_seq = true; |
2298 | ||
31b8006e | 2299 | /* queue */ |
ec302645 | 2300 | mutex_lock(&con->mutex); |
31b8006e SW |
2301 | BUG_ON(!list_empty(&msg->list_head)); |
2302 | list_add_tail(&msg->list_head, &con->out_queue); | |
2303 | dout("----- %p to %s%lld %d=%s len %d+%d+%d -----\n", msg, | |
2304 | ENTITY_NAME(con->peer_name), le16_to_cpu(msg->hdr.type), | |
2305 | ceph_msg_type_name(le16_to_cpu(msg->hdr.type)), | |
2306 | le32_to_cpu(msg->hdr.front_len), | |
2307 | le32_to_cpu(msg->hdr.middle_len), | |
2308 | le32_to_cpu(msg->hdr.data_len)); | |
ec302645 | 2309 | mutex_unlock(&con->mutex); |
31b8006e SW |
2310 | |
2311 | /* if there wasn't anything waiting to send before, queue | |
2312 | * new work */ | |
e00de341 | 2313 | clear_standby(con); |
31b8006e SW |
2314 | if (test_and_set_bit(WRITE_PENDING, &con->state) == 0) |
2315 | queue_con(con); | |
2316 | } | |
3d14c5d2 | 2317 | EXPORT_SYMBOL(ceph_con_send); |
31b8006e SW |
2318 | |
2319 | /* | |
2320 | * Revoke a message that was previously queued for send | |
2321 | */ | |
2322 | void ceph_con_revoke(struct ceph_connection *con, struct ceph_msg *msg) | |
2323 | { | |
ec302645 | 2324 | mutex_lock(&con->mutex); |
31b8006e | 2325 | if (!list_empty(&msg->list_head)) { |
ed98adad | 2326 | dout("con_revoke %p msg %p - was on queue\n", con, msg); |
31b8006e SW |
2327 | list_del_init(&msg->list_head); |
2328 | ceph_msg_put(msg); | |
2329 | msg->hdr.seq = 0; | |
ed98adad SW |
2330 | } |
2331 | if (con->out_msg == msg) { | |
2332 | dout("con_revoke %p msg %p - was sending\n", con, msg); | |
2333 | con->out_msg = NULL; | |
31b8006e SW |
2334 | if (con->out_kvec_is_msg) { |
2335 | con->out_skip = con->out_kvec_bytes; | |
2336 | con->out_kvec_is_msg = false; | |
2337 | } | |
ed98adad SW |
2338 | ceph_msg_put(msg); |
2339 | msg->hdr.seq = 0; | |
31b8006e | 2340 | } |
ec302645 | 2341 | mutex_unlock(&con->mutex); |
31b8006e SW |
2342 | } |
2343 | ||
350b1c32 | 2344 | /* |
0d59ab81 | 2345 | * Revoke a message that we may be reading data into |
350b1c32 | 2346 | */ |
0d59ab81 | 2347 | void ceph_con_revoke_message(struct ceph_connection *con, struct ceph_msg *msg) |
350b1c32 SW |
2348 | { |
2349 | mutex_lock(&con->mutex); | |
0d59ab81 YS |
2350 | if (con->in_msg && con->in_msg == msg) { |
2351 | unsigned front_len = le32_to_cpu(con->in_hdr.front_len); | |
2352 | unsigned middle_len = le32_to_cpu(con->in_hdr.middle_len); | |
350b1c32 SW |
2353 | unsigned data_len = le32_to_cpu(con->in_hdr.data_len); |
2354 | ||
2355 | /* skip rest of message */ | |
0d59ab81 | 2356 | dout("con_revoke_pages %p msg %p revoked\n", con, msg); |
350b1c32 SW |
2357 | con->in_base_pos = con->in_base_pos - |
2358 | sizeof(struct ceph_msg_header) - | |
0d59ab81 YS |
2359 | front_len - |
2360 | middle_len - | |
2361 | data_len - | |
350b1c32 | 2362 | sizeof(struct ceph_msg_footer); |
350b1c32 SW |
2363 | ceph_msg_put(con->in_msg); |
2364 | con->in_msg = NULL; | |
2365 | con->in_tag = CEPH_MSGR_TAG_READY; | |
684be25c | 2366 | con->in_seq++; |
350b1c32 SW |
2367 | } else { |
2368 | dout("con_revoke_pages %p msg %p pages %p no-op\n", | |
0d59ab81 | 2369 | con, con->in_msg, msg); |
350b1c32 SW |
2370 | } |
2371 | mutex_unlock(&con->mutex); | |
2372 | } | |
2373 | ||
31b8006e SW |
2374 | /* |
2375 | * Queue a keepalive byte to ensure the tcp connection is alive. | |
2376 | */ | |
2377 | void ceph_con_keepalive(struct ceph_connection *con) | |
2378 | { | |
e00de341 SW |
2379 | dout("con_keepalive %p\n", con); |
2380 | clear_standby(con); | |
31b8006e SW |
2381 | if (test_and_set_bit(KEEPALIVE_PENDING, &con->state) == 0 && |
2382 | test_and_set_bit(WRITE_PENDING, &con->state) == 0) | |
2383 | queue_con(con); | |
2384 | } | |
3d14c5d2 | 2385 | EXPORT_SYMBOL(ceph_con_keepalive); |
31b8006e SW |
2386 | |
2387 | ||
2388 | /* | |
2389 | * construct a new message with given type, size | |
2390 | * the new msg has a ref count of 1. | |
2391 | */ | |
b61c2763 SW |
2392 | struct ceph_msg *ceph_msg_new(int type, int front_len, gfp_t flags, |
2393 | bool can_fail) | |
31b8006e SW |
2394 | { |
2395 | struct ceph_msg *m; | |
2396 | ||
34d23762 | 2397 | m = kmalloc(sizeof(*m), flags); |
31b8006e SW |
2398 | if (m == NULL) |
2399 | goto out; | |
c2e552e7 | 2400 | kref_init(&m->kref); |
31b8006e SW |
2401 | INIT_LIST_HEAD(&m->list_head); |
2402 | ||
45c6ceb5 | 2403 | m->hdr.tid = 0; |
31b8006e | 2404 | m->hdr.type = cpu_to_le16(type); |
45c6ceb5 SW |
2405 | m->hdr.priority = cpu_to_le16(CEPH_MSG_PRIO_DEFAULT); |
2406 | m->hdr.version = 0; | |
31b8006e SW |
2407 | m->hdr.front_len = cpu_to_le32(front_len); |
2408 | m->hdr.middle_len = 0; | |
bb257664 SW |
2409 | m->hdr.data_len = 0; |
2410 | m->hdr.data_off = 0; | |
45c6ceb5 | 2411 | m->hdr.reserved = 0; |
31b8006e SW |
2412 | m->footer.front_crc = 0; |
2413 | m->footer.middle_crc = 0; | |
2414 | m->footer.data_crc = 0; | |
45c6ceb5 | 2415 | m->footer.flags = 0; |
31b8006e SW |
2416 | m->front_max = front_len; |
2417 | m->front_is_vmalloc = false; | |
2418 | m->more_to_follow = false; | |
c0d5f9db | 2419 | m->ack_stamp = 0; |
31b8006e SW |
2420 | m->pool = NULL; |
2421 | ||
ca20892d HC |
2422 | /* middle */ |
2423 | m->middle = NULL; | |
2424 | ||
2425 | /* data */ | |
2426 | m->nr_pages = 0; | |
2427 | m->page_alignment = 0; | |
2428 | m->pages = NULL; | |
2429 | m->pagelist = NULL; | |
2430 | m->bio = NULL; | |
2431 | m->bio_iter = NULL; | |
2432 | m->bio_seg = 0; | |
2433 | m->trail = NULL; | |
2434 | ||
31b8006e SW |
2435 | /* front */ |
2436 | if (front_len) { | |
2437 | if (front_len > PAGE_CACHE_SIZE) { | |
34d23762 | 2438 | m->front.iov_base = __vmalloc(front_len, flags, |
31b8006e SW |
2439 | PAGE_KERNEL); |
2440 | m->front_is_vmalloc = true; | |
2441 | } else { | |
34d23762 | 2442 | m->front.iov_base = kmalloc(front_len, flags); |
31b8006e SW |
2443 | } |
2444 | if (m->front.iov_base == NULL) { | |
b61c2763 | 2445 | dout("ceph_msg_new can't allocate %d bytes\n", |
31b8006e SW |
2446 | front_len); |
2447 | goto out2; | |
2448 | } | |
2449 | } else { | |
2450 | m->front.iov_base = NULL; | |
2451 | } | |
2452 | m->front.iov_len = front_len; | |
2453 | ||
bb257664 | 2454 | dout("ceph_msg_new %p front %d\n", m, front_len); |
31b8006e SW |
2455 | return m; |
2456 | ||
2457 | out2: | |
2458 | ceph_msg_put(m); | |
2459 | out: | |
b61c2763 SW |
2460 | if (!can_fail) { |
2461 | pr_err("msg_new can't create type %d front %d\n", type, | |
2462 | front_len); | |
f0ed1b7c | 2463 | WARN_ON(1); |
b61c2763 SW |
2464 | } else { |
2465 | dout("msg_new can't create type %d front %d\n", type, | |
2466 | front_len); | |
2467 | } | |
a79832f2 | 2468 | return NULL; |
31b8006e | 2469 | } |
3d14c5d2 | 2470 | EXPORT_SYMBOL(ceph_msg_new); |
31b8006e | 2471 | |
31b8006e SW |
2472 | /* |
2473 | * Allocate "middle" portion of a message, if it is needed and wasn't | |
2474 | * allocated by alloc_msg. This allows us to read a small fixed-size | |
2475 | * per-type header in the front and then gracefully fail (i.e., | |
2476 | * propagate the error to the caller based on info in the front) when | |
2477 | * the middle is too large. | |
2478 | */ | |
2450418c | 2479 | static int ceph_alloc_middle(struct ceph_connection *con, struct ceph_msg *msg) |
31b8006e SW |
2480 | { |
2481 | int type = le16_to_cpu(msg->hdr.type); | |
2482 | int middle_len = le32_to_cpu(msg->hdr.middle_len); | |
2483 | ||
2484 | dout("alloc_middle %p type %d %s middle_len %d\n", msg, type, | |
2485 | ceph_msg_type_name(type), middle_len); | |
2486 | BUG_ON(!middle_len); | |
2487 | BUG_ON(msg->middle); | |
2488 | ||
b6c1d5b8 | 2489 | msg->middle = ceph_buffer_new(middle_len, GFP_NOFS); |
31b8006e SW |
2490 | if (!msg->middle) |
2491 | return -ENOMEM; | |
2492 | return 0; | |
2493 | } | |
2494 | ||
2450418c YS |
2495 | /* |
2496 | * Generic message allocator, for incoming messages. | |
2497 | */ | |
2498 | static struct ceph_msg *ceph_alloc_msg(struct ceph_connection *con, | |
2499 | struct ceph_msg_header *hdr, | |
2500 | int *skip) | |
2501 | { | |
2502 | int type = le16_to_cpu(hdr->type); | |
2503 | int front_len = le32_to_cpu(hdr->front_len); | |
2504 | int middle_len = le32_to_cpu(hdr->middle_len); | |
2505 | struct ceph_msg *msg = NULL; | |
2506 | int ret; | |
2507 | ||
2508 | if (con->ops->alloc_msg) { | |
0547a9b3 | 2509 | mutex_unlock(&con->mutex); |
2450418c | 2510 | msg = con->ops->alloc_msg(con, hdr, skip); |
0547a9b3 | 2511 | mutex_lock(&con->mutex); |
a79832f2 | 2512 | if (!msg || *skip) |
2450418c YS |
2513 | return NULL; |
2514 | } | |
2515 | if (!msg) { | |
2516 | *skip = 0; | |
b61c2763 | 2517 | msg = ceph_msg_new(type, front_len, GFP_NOFS, false); |
2450418c YS |
2518 | if (!msg) { |
2519 | pr_err("unable to allocate msg type %d len %d\n", | |
2520 | type, front_len); | |
a79832f2 | 2521 | return NULL; |
2450418c | 2522 | } |
c5c6b19d | 2523 | msg->page_alignment = le16_to_cpu(hdr->data_off); |
2450418c | 2524 | } |
9d7f0f13 | 2525 | memcpy(&msg->hdr, &con->in_hdr, sizeof(con->in_hdr)); |
2450418c | 2526 | |
bb257664 | 2527 | if (middle_len && !msg->middle) { |
2450418c | 2528 | ret = ceph_alloc_middle(con, msg); |
2450418c YS |
2529 | if (ret < 0) { |
2530 | ceph_msg_put(msg); | |
a79832f2 | 2531 | return NULL; |
2450418c YS |
2532 | } |
2533 | } | |
9d7f0f13 | 2534 | |
2450418c YS |
2535 | return msg; |
2536 | } | |
2537 | ||
31b8006e SW |
2538 | |
2539 | /* | |
2540 | * Free a generically kmalloc'd message. | |
2541 | */ | |
2542 | void ceph_msg_kfree(struct ceph_msg *m) | |
2543 | { | |
2544 | dout("msg_kfree %p\n", m); | |
2545 | if (m->front_is_vmalloc) | |
2546 | vfree(m->front.iov_base); | |
2547 | else | |
2548 | kfree(m->front.iov_base); | |
2549 | kfree(m); | |
2550 | } | |
2551 | ||
2552 | /* | |
2553 | * Drop a msg ref. Destroy as needed. | |
2554 | */ | |
c2e552e7 SW |
2555 | void ceph_msg_last_put(struct kref *kref) |
2556 | { | |
2557 | struct ceph_msg *m = container_of(kref, struct ceph_msg, kref); | |
31b8006e | 2558 | |
c2e552e7 SW |
2559 | dout("ceph_msg_put last one on %p\n", m); |
2560 | WARN_ON(!list_empty(&m->list_head)); | |
2561 | ||
2562 | /* drop middle, data, if any */ | |
2563 | if (m->middle) { | |
2564 | ceph_buffer_put(m->middle); | |
2565 | m->middle = NULL; | |
31b8006e | 2566 | } |
c2e552e7 SW |
2567 | m->nr_pages = 0; |
2568 | m->pages = NULL; | |
2569 | ||
58bb3b37 SW |
2570 | if (m->pagelist) { |
2571 | ceph_pagelist_release(m->pagelist); | |
2572 | kfree(m->pagelist); | |
2573 | m->pagelist = NULL; | |
2574 | } | |
2575 | ||
68b4476b YS |
2576 | m->trail = NULL; |
2577 | ||
c2e552e7 SW |
2578 | if (m->pool) |
2579 | ceph_msgpool_put(m->pool, m); | |
2580 | else | |
2581 | ceph_msg_kfree(m); | |
31b8006e | 2582 | } |
3d14c5d2 | 2583 | EXPORT_SYMBOL(ceph_msg_last_put); |
9ec7cab1 SW |
2584 | |
2585 | void ceph_msg_dump(struct ceph_msg *msg) | |
2586 | { | |
2587 | pr_debug("msg_dump %p (front_max %d nr_pages %d)\n", msg, | |
2588 | msg->front_max, msg->nr_pages); | |
2589 | print_hex_dump(KERN_DEBUG, "header: ", | |
2590 | DUMP_PREFIX_OFFSET, 16, 1, | |
2591 | &msg->hdr, sizeof(msg->hdr), true); | |
2592 | print_hex_dump(KERN_DEBUG, " front: ", | |
2593 | DUMP_PREFIX_OFFSET, 16, 1, | |
2594 | msg->front.iov_base, msg->front.iov_len, true); | |
2595 | if (msg->middle) | |
2596 | print_hex_dump(KERN_DEBUG, "middle: ", | |
2597 | DUMP_PREFIX_OFFSET, 16, 1, | |
2598 | msg->middle->vec.iov_base, | |
2599 | msg->middle->vec.iov_len, true); | |
2600 | print_hex_dump(KERN_DEBUG, "footer: ", | |
2601 | DUMP_PREFIX_OFFSET, 16, 1, | |
2602 | &msg->footer, sizeof(msg->footer), true); | |
2603 | } | |
3d14c5d2 | 2604 | EXPORT_SYMBOL(ceph_msg_dump); |