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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 | ||
bc18f4b1 AE |
32 | /* |
33 | * We track the state of the socket on a given connection using | |
34 | * values defined below. The transition to a new socket state is | |
35 | * handled by a function which verifies we aren't coming from an | |
36 | * unexpected state. | |
37 | * | |
38 | * -------- | |
39 | * | NEW* | transient initial state | |
40 | * -------- | |
41 | * | con_sock_state_init() | |
42 | * v | |
43 | * ---------- | |
44 | * | CLOSED | initialized, but no socket (and no | |
45 | * ---------- TCP connection) | |
46 | * ^ \ | |
47 | * | \ con_sock_state_connecting() | |
48 | * | ---------------------- | |
49 | * | \ | |
50 | * + con_sock_state_closed() \ | |
fbb85a47 SW |
51 | * |+--------------------------- \ |
52 | * | \ \ \ | |
53 | * | ----------- \ \ | |
54 | * | | CLOSING | socket event; \ \ | |
55 | * | ----------- await close \ \ | |
56 | * | ^ \ | | |
57 | * | | \ | | |
58 | * | + con_sock_state_closing() \ | | |
59 | * | / \ | | | |
60 | * | / --------------- | | | |
61 | * | / \ v v | |
bc18f4b1 AE |
62 | * | / -------------- |
63 | * | / -----------------| CONNECTING | socket created, TCP | |
64 | * | | / -------------- connect initiated | |
65 | * | | | con_sock_state_connected() | |
66 | * | | v | |
67 | * ------------- | |
68 | * | CONNECTED | TCP connection established | |
69 | * ------------- | |
70 | * | |
71 | * State values for ceph_connection->sock_state; NEW is assumed to be 0. | |
72 | */ | |
ce2c8903 AE |
73 | |
74 | #define CON_SOCK_STATE_NEW 0 /* -> CLOSED */ | |
75 | #define CON_SOCK_STATE_CLOSED 1 /* -> CONNECTING */ | |
76 | #define CON_SOCK_STATE_CONNECTING 2 /* -> CONNECTED or -> CLOSING */ | |
77 | #define CON_SOCK_STATE_CONNECTED 3 /* -> CLOSING or -> CLOSED */ | |
78 | #define CON_SOCK_STATE_CLOSING 4 /* -> CLOSED */ | |
79 | ||
31b8006e SW |
80 | /* static tag bytes (protocol control messages) */ |
81 | static char tag_msg = CEPH_MSGR_TAG_MSG; | |
82 | static char tag_ack = CEPH_MSGR_TAG_ACK; | |
83 | static char tag_keepalive = CEPH_MSGR_TAG_KEEPALIVE; | |
84 | ||
a6a5349d SW |
85 | #ifdef CONFIG_LOCKDEP |
86 | static struct lock_class_key socket_class; | |
87 | #endif | |
88 | ||
84495f49 AE |
89 | /* |
90 | * When skipping (ignoring) a block of input we read it into a "skip | |
91 | * buffer," which is this many bytes in size. | |
92 | */ | |
93 | #define SKIP_BUF_SIZE 1024 | |
31b8006e SW |
94 | |
95 | static void queue_con(struct ceph_connection *con); | |
96 | static void con_work(struct work_struct *); | |
97 | static void ceph_fault(struct ceph_connection *con); | |
98 | ||
31b8006e | 99 | /* |
f64a9317 AE |
100 | * Nicely render a sockaddr as a string. An array of formatted |
101 | * strings is used, to approximate reentrancy. | |
31b8006e | 102 | */ |
f64a9317 AE |
103 | #define ADDR_STR_COUNT_LOG 5 /* log2(# address strings in array) */ |
104 | #define ADDR_STR_COUNT (1 << ADDR_STR_COUNT_LOG) | |
105 | #define ADDR_STR_COUNT_MASK (ADDR_STR_COUNT - 1) | |
106 | #define MAX_ADDR_STR_LEN 64 /* 54 is enough */ | |
107 | ||
108 | static char addr_str[ADDR_STR_COUNT][MAX_ADDR_STR_LEN]; | |
109 | static atomic_t addr_str_seq = ATOMIC_INIT(0); | |
31b8006e | 110 | |
57666519 | 111 | static struct page *zero_page; /* used in certain error cases */ |
57666519 | 112 | |
3d14c5d2 | 113 | const char *ceph_pr_addr(const struct sockaddr_storage *ss) |
31b8006e SW |
114 | { |
115 | int i; | |
116 | char *s; | |
99f0f3b2 AE |
117 | struct sockaddr_in *in4 = (struct sockaddr_in *) ss; |
118 | struct sockaddr_in6 *in6 = (struct sockaddr_in6 *) ss; | |
31b8006e | 119 | |
f64a9317 | 120 | i = atomic_inc_return(&addr_str_seq) & ADDR_STR_COUNT_MASK; |
31b8006e SW |
121 | s = addr_str[i]; |
122 | ||
123 | switch (ss->ss_family) { | |
124 | case AF_INET: | |
bd406145 AE |
125 | snprintf(s, MAX_ADDR_STR_LEN, "%pI4:%hu", &in4->sin_addr, |
126 | ntohs(in4->sin_port)); | |
31b8006e SW |
127 | break; |
128 | ||
129 | case AF_INET6: | |
bd406145 AE |
130 | snprintf(s, MAX_ADDR_STR_LEN, "[%pI6c]:%hu", &in6->sin6_addr, |
131 | ntohs(in6->sin6_port)); | |
31b8006e SW |
132 | break; |
133 | ||
134 | default: | |
d3002b97 AE |
135 | snprintf(s, MAX_ADDR_STR_LEN, "(unknown sockaddr family %hu)", |
136 | ss->ss_family); | |
31b8006e SW |
137 | } |
138 | ||
139 | return s; | |
140 | } | |
3d14c5d2 | 141 | EXPORT_SYMBOL(ceph_pr_addr); |
31b8006e | 142 | |
63f2d211 SW |
143 | static void encode_my_addr(struct ceph_messenger *msgr) |
144 | { | |
145 | memcpy(&msgr->my_enc_addr, &msgr->inst.addr, sizeof(msgr->my_enc_addr)); | |
146 | ceph_encode_addr(&msgr->my_enc_addr); | |
147 | } | |
148 | ||
31b8006e SW |
149 | /* |
150 | * work queue for all reading and writing to/from the socket. | |
151 | */ | |
e0f43c94 | 152 | static struct workqueue_struct *ceph_msgr_wq; |
31b8006e | 153 | |
6173d1f0 AE |
154 | void _ceph_msgr_exit(void) |
155 | { | |
d3002b97 | 156 | if (ceph_msgr_wq) { |
6173d1f0 | 157 | destroy_workqueue(ceph_msgr_wq); |
d3002b97 AE |
158 | ceph_msgr_wq = NULL; |
159 | } | |
6173d1f0 | 160 | |
6173d1f0 AE |
161 | BUG_ON(zero_page == NULL); |
162 | kunmap(zero_page); | |
163 | page_cache_release(zero_page); | |
164 | zero_page = NULL; | |
165 | } | |
166 | ||
3d14c5d2 | 167 | int ceph_msgr_init(void) |
31b8006e | 168 | { |
57666519 AE |
169 | BUG_ON(zero_page != NULL); |
170 | zero_page = ZERO_PAGE(0); | |
171 | page_cache_get(zero_page); | |
172 | ||
f363e45f | 173 | ceph_msgr_wq = alloc_workqueue("ceph-msgr", WQ_NON_REENTRANT, 0); |
6173d1f0 AE |
174 | if (ceph_msgr_wq) |
175 | return 0; | |
57666519 | 176 | |
6173d1f0 AE |
177 | pr_err("msgr_init failed to create workqueue\n"); |
178 | _ceph_msgr_exit(); | |
57666519 | 179 | |
6173d1f0 | 180 | return -ENOMEM; |
31b8006e | 181 | } |
3d14c5d2 | 182 | EXPORT_SYMBOL(ceph_msgr_init); |
31b8006e SW |
183 | |
184 | void ceph_msgr_exit(void) | |
185 | { | |
57666519 | 186 | BUG_ON(ceph_msgr_wq == NULL); |
57666519 | 187 | |
6173d1f0 | 188 | _ceph_msgr_exit(); |
31b8006e | 189 | } |
3d14c5d2 | 190 | EXPORT_SYMBOL(ceph_msgr_exit); |
31b8006e | 191 | |
cd84db6e | 192 | void ceph_msgr_flush(void) |
a922d38f SW |
193 | { |
194 | flush_workqueue(ceph_msgr_wq); | |
195 | } | |
3d14c5d2 | 196 | EXPORT_SYMBOL(ceph_msgr_flush); |
a922d38f | 197 | |
ce2c8903 AE |
198 | /* Connection socket state transition functions */ |
199 | ||
200 | static void con_sock_state_init(struct ceph_connection *con) | |
201 | { | |
202 | int old_state; | |
203 | ||
204 | old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CLOSED); | |
205 | if (WARN_ON(old_state != CON_SOCK_STATE_NEW)) | |
206 | printk("%s: unexpected old state %d\n", __func__, old_state); | |
207 | } | |
208 | ||
209 | static void con_sock_state_connecting(struct ceph_connection *con) | |
210 | { | |
211 | int old_state; | |
212 | ||
213 | old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CONNECTING); | |
214 | if (WARN_ON(old_state != CON_SOCK_STATE_CLOSED)) | |
215 | printk("%s: unexpected old state %d\n", __func__, old_state); | |
216 | } | |
217 | ||
218 | static void con_sock_state_connected(struct ceph_connection *con) | |
219 | { | |
220 | int old_state; | |
221 | ||
222 | old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CONNECTED); | |
223 | if (WARN_ON(old_state != CON_SOCK_STATE_CONNECTING)) | |
224 | printk("%s: unexpected old state %d\n", __func__, old_state); | |
225 | } | |
226 | ||
227 | static void con_sock_state_closing(struct ceph_connection *con) | |
228 | { | |
229 | int old_state; | |
230 | ||
231 | old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CLOSING); | |
232 | if (WARN_ON(old_state != CON_SOCK_STATE_CONNECTING && | |
233 | old_state != CON_SOCK_STATE_CONNECTED && | |
234 | old_state != CON_SOCK_STATE_CLOSING)) | |
235 | printk("%s: unexpected old state %d\n", __func__, old_state); | |
236 | } | |
237 | ||
238 | static void con_sock_state_closed(struct ceph_connection *con) | |
239 | { | |
240 | int old_state; | |
241 | ||
242 | old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CLOSED); | |
243 | if (WARN_ON(old_state != CON_SOCK_STATE_CONNECTED && | |
fbb85a47 SW |
244 | old_state != CON_SOCK_STATE_CLOSING && |
245 | old_state != CON_SOCK_STATE_CONNECTING)) | |
ce2c8903 AE |
246 | printk("%s: unexpected old state %d\n", __func__, old_state); |
247 | } | |
a922d38f | 248 | |
31b8006e SW |
249 | /* |
250 | * socket callback functions | |
251 | */ | |
252 | ||
253 | /* data available on socket, or listen socket received a connect */ | |
327800bd | 254 | static void ceph_sock_data_ready(struct sock *sk, int count_unused) |
31b8006e | 255 | { |
bd406145 | 256 | struct ceph_connection *con = sk->sk_user_data; |
a2a32584 GH |
257 | if (atomic_read(&con->msgr->stopping)) { |
258 | return; | |
259 | } | |
bd406145 | 260 | |
31b8006e | 261 | if (sk->sk_state != TCP_CLOSE_WAIT) { |
327800bd | 262 | dout("%s on %p state = %lu, queueing work\n", __func__, |
31b8006e SW |
263 | con, con->state); |
264 | queue_con(con); | |
265 | } | |
266 | } | |
267 | ||
268 | /* socket has buffer space for writing */ | |
327800bd | 269 | static void ceph_sock_write_space(struct sock *sk) |
31b8006e | 270 | { |
d3002b97 | 271 | struct ceph_connection *con = sk->sk_user_data; |
31b8006e | 272 | |
182fac26 JS |
273 | /* only queue to workqueue if there is data we want to write, |
274 | * and there is sufficient space in the socket buffer to accept | |
327800bd | 275 | * more data. clear SOCK_NOSPACE so that ceph_sock_write_space() |
182fac26 JS |
276 | * doesn't get called again until try_write() fills the socket |
277 | * buffer. See net/ipv4/tcp_input.c:tcp_check_space() | |
278 | * and net/core/stream.c:sk_stream_write_space(). | |
279 | */ | |
928443cd | 280 | if (test_bit(WRITE_PENDING, &con->flags)) { |
182fac26 | 281 | if (sk_stream_wspace(sk) >= sk_stream_min_wspace(sk)) { |
327800bd | 282 | dout("%s %p queueing write work\n", __func__, con); |
182fac26 JS |
283 | clear_bit(SOCK_NOSPACE, &sk->sk_socket->flags); |
284 | queue_con(con); | |
285 | } | |
31b8006e | 286 | } else { |
327800bd | 287 | dout("%s %p nothing to write\n", __func__, con); |
31b8006e | 288 | } |
31b8006e SW |
289 | } |
290 | ||
291 | /* socket's state has changed */ | |
327800bd | 292 | static void ceph_sock_state_change(struct sock *sk) |
31b8006e | 293 | { |
bd406145 | 294 | struct ceph_connection *con = sk->sk_user_data; |
31b8006e | 295 | |
327800bd | 296 | dout("%s %p state = %lu sk_state = %u\n", __func__, |
31b8006e SW |
297 | con, con->state, sk->sk_state); |
298 | ||
299 | if (test_bit(CLOSED, &con->state)) | |
300 | return; | |
301 | ||
302 | switch (sk->sk_state) { | |
303 | case TCP_CLOSE: | |
327800bd | 304 | dout("%s TCP_CLOSE\n", __func__); |
31b8006e | 305 | case TCP_CLOSE_WAIT: |
327800bd | 306 | dout("%s TCP_CLOSE_WAIT\n", __func__); |
ce2c8903 | 307 | con_sock_state_closing(con); |
d65c9e0b AE |
308 | set_bit(SOCK_CLOSED, &con->flags); |
309 | queue_con(con); | |
31b8006e SW |
310 | break; |
311 | case TCP_ESTABLISHED: | |
327800bd | 312 | dout("%s TCP_ESTABLISHED\n", __func__); |
ce2c8903 | 313 | con_sock_state_connected(con); |
31b8006e SW |
314 | queue_con(con); |
315 | break; | |
d3002b97 AE |
316 | default: /* Everything else is uninteresting */ |
317 | break; | |
31b8006e SW |
318 | } |
319 | } | |
320 | ||
321 | /* | |
322 | * set up socket callbacks | |
323 | */ | |
324 | static void set_sock_callbacks(struct socket *sock, | |
325 | struct ceph_connection *con) | |
326 | { | |
327 | struct sock *sk = sock->sk; | |
bd406145 | 328 | sk->sk_user_data = con; |
327800bd AE |
329 | sk->sk_data_ready = ceph_sock_data_ready; |
330 | sk->sk_write_space = ceph_sock_write_space; | |
331 | sk->sk_state_change = ceph_sock_state_change; | |
31b8006e SW |
332 | } |
333 | ||
334 | ||
335 | /* | |
336 | * socket helpers | |
337 | */ | |
338 | ||
339 | /* | |
340 | * initiate connection to a remote socket. | |
341 | */ | |
41617d0c | 342 | static int ceph_tcp_connect(struct ceph_connection *con) |
31b8006e | 343 | { |
f91d3471 | 344 | struct sockaddr_storage *paddr = &con->peer_addr.in_addr; |
31b8006e SW |
345 | struct socket *sock; |
346 | int ret; | |
347 | ||
348 | BUG_ON(con->sock); | |
f91d3471 SW |
349 | ret = sock_create_kern(con->peer_addr.in_addr.ss_family, SOCK_STREAM, |
350 | IPPROTO_TCP, &sock); | |
31b8006e | 351 | if (ret) |
41617d0c | 352 | return ret; |
31b8006e SW |
353 | sock->sk->sk_allocation = GFP_NOFS; |
354 | ||
a6a5349d SW |
355 | #ifdef CONFIG_LOCKDEP |
356 | lockdep_set_class(&sock->sk->sk_lock, &socket_class); | |
357 | #endif | |
358 | ||
31b8006e SW |
359 | set_sock_callbacks(sock, con); |
360 | ||
3d14c5d2 | 361 | dout("connect %s\n", ceph_pr_addr(&con->peer_addr.in_addr)); |
31b8006e | 362 | |
89a86be0 | 363 | con_sock_state_connecting(con); |
f91d3471 SW |
364 | ret = sock->ops->connect(sock, (struct sockaddr *)paddr, sizeof(*paddr), |
365 | O_NONBLOCK); | |
31b8006e SW |
366 | if (ret == -EINPROGRESS) { |
367 | dout("connect %s EINPROGRESS sk_state = %u\n", | |
3d14c5d2 | 368 | ceph_pr_addr(&con->peer_addr.in_addr), |
31b8006e | 369 | sock->sk->sk_state); |
a5bc3129 | 370 | } else if (ret < 0) { |
31b8006e | 371 | pr_err("connect %s error %d\n", |
3d14c5d2 | 372 | ceph_pr_addr(&con->peer_addr.in_addr), ret); |
31b8006e | 373 | sock_release(sock); |
31b8006e | 374 | con->error_msg = "connect error"; |
31b8006e | 375 | |
41617d0c | 376 | return ret; |
a5bc3129 AE |
377 | } |
378 | con->sock = sock; | |
41617d0c | 379 | return 0; |
31b8006e SW |
380 | } |
381 | ||
382 | static int ceph_tcp_recvmsg(struct socket *sock, void *buf, size_t len) | |
383 | { | |
384 | struct kvec iov = {buf, len}; | |
385 | struct msghdr msg = { .msg_flags = MSG_DONTWAIT | MSG_NOSIGNAL }; | |
98bdb0aa | 386 | int r; |
31b8006e | 387 | |
98bdb0aa SW |
388 | r = kernel_recvmsg(sock, &msg, &iov, 1, len, msg.msg_flags); |
389 | if (r == -EAGAIN) | |
390 | r = 0; | |
391 | return r; | |
31b8006e SW |
392 | } |
393 | ||
394 | /* | |
395 | * write something. @more is true if caller will be sending more data | |
396 | * shortly. | |
397 | */ | |
398 | static int ceph_tcp_sendmsg(struct socket *sock, struct kvec *iov, | |
399 | size_t kvlen, size_t len, int more) | |
400 | { | |
401 | struct msghdr msg = { .msg_flags = MSG_DONTWAIT | MSG_NOSIGNAL }; | |
42961d23 | 402 | int r; |
31b8006e SW |
403 | |
404 | if (more) | |
405 | msg.msg_flags |= MSG_MORE; | |
406 | else | |
407 | msg.msg_flags |= MSG_EOR; /* superfluous, but what the hell */ | |
408 | ||
42961d23 SW |
409 | r = kernel_sendmsg(sock, &msg, iov, kvlen, len); |
410 | if (r == -EAGAIN) | |
411 | r = 0; | |
412 | return r; | |
31b8006e SW |
413 | } |
414 | ||
31739139 AE |
415 | static int ceph_tcp_sendpage(struct socket *sock, struct page *page, |
416 | int offset, size_t size, int more) | |
417 | { | |
418 | int flags = MSG_DONTWAIT | MSG_NOSIGNAL | (more ? MSG_MORE : MSG_EOR); | |
419 | int ret; | |
420 | ||
421 | ret = kernel_sendpage(sock, page, offset, size, flags); | |
422 | if (ret == -EAGAIN) | |
423 | ret = 0; | |
424 | ||
425 | return ret; | |
426 | } | |
427 | ||
31b8006e SW |
428 | |
429 | /* | |
430 | * Shutdown/close the socket for the given connection. | |
431 | */ | |
432 | static int con_close_socket(struct ceph_connection *con) | |
433 | { | |
434 | int rc; | |
435 | ||
436 | dout("con_close_socket on %p sock %p\n", con, con->sock); | |
437 | if (!con->sock) | |
438 | return 0; | |
31b8006e SW |
439 | rc = con->sock->ops->shutdown(con->sock, SHUT_RDWR); |
440 | sock_release(con->sock); | |
441 | con->sock = NULL; | |
456ea468 AE |
442 | |
443 | /* | |
444 | * Forcibly clear the SOCK_CLOSE flag. It gets set | |
445 | * independent of the connection mutex, and we could have | |
446 | * received a socket close event before we had the chance to | |
447 | * shut the socket down. | |
448 | */ | |
a8d00e3c | 449 | clear_bit(SOCK_CLOSED, &con->flags); |
ce2c8903 | 450 | con_sock_state_closed(con); |
31b8006e SW |
451 | return rc; |
452 | } | |
453 | ||
454 | /* | |
455 | * Reset a connection. Discard all incoming and outgoing messages | |
456 | * and clear *_seq state. | |
457 | */ | |
458 | static void ceph_msg_remove(struct ceph_msg *msg) | |
459 | { | |
460 | list_del_init(&msg->list_head); | |
38941f80 | 461 | BUG_ON(msg->con == NULL); |
36eb71aa | 462 | msg->con->ops->put(msg->con); |
38941f80 AE |
463 | msg->con = NULL; |
464 | ||
31b8006e SW |
465 | ceph_msg_put(msg); |
466 | } | |
467 | static void ceph_msg_remove_list(struct list_head *head) | |
468 | { | |
469 | while (!list_empty(head)) { | |
470 | struct ceph_msg *msg = list_first_entry(head, struct ceph_msg, | |
471 | list_head); | |
472 | ceph_msg_remove(msg); | |
473 | } | |
474 | } | |
475 | ||
476 | static void reset_connection(struct ceph_connection *con) | |
477 | { | |
478 | /* reset connection, out_queue, msg_ and connect_seq */ | |
479 | /* discard existing out_queue and msg_seq */ | |
31b8006e SW |
480 | ceph_msg_remove_list(&con->out_queue); |
481 | ceph_msg_remove_list(&con->out_sent); | |
482 | ||
cf3e5c40 | 483 | if (con->in_msg) { |
38941f80 AE |
484 | BUG_ON(con->in_msg->con != con); |
485 | con->in_msg->con = NULL; | |
cf3e5c40 SW |
486 | ceph_msg_put(con->in_msg); |
487 | con->in_msg = NULL; | |
36eb71aa | 488 | con->ops->put(con); |
cf3e5c40 SW |
489 | } |
490 | ||
31b8006e SW |
491 | con->connect_seq = 0; |
492 | con->out_seq = 0; | |
c86a2930 SW |
493 | if (con->out_msg) { |
494 | ceph_msg_put(con->out_msg); | |
495 | con->out_msg = NULL; | |
496 | } | |
31b8006e | 497 | con->in_seq = 0; |
0e0d5e0c | 498 | con->in_seq_acked = 0; |
31b8006e SW |
499 | } |
500 | ||
501 | /* | |
502 | * mark a peer down. drop any open connections. | |
503 | */ | |
504 | void ceph_con_close(struct ceph_connection *con) | |
505 | { | |
8c50c817 | 506 | mutex_lock(&con->mutex); |
3d14c5d2 YS |
507 | dout("con_close %p peer %s\n", con, |
508 | ceph_pr_addr(&con->peer_addr.in_addr)); | |
a5988c49 | 509 | clear_bit(NEGOTIATING, &con->state); |
bb9e6bba | 510 | clear_bit(CONNECTING, &con->state); |
e27947c7 | 511 | clear_bit(CONNECTED, &con->state); |
31b8006e | 512 | clear_bit(STANDBY, &con->state); /* avoid connect_seq bump */ |
a5988c49 AE |
513 | set_bit(CLOSED, &con->state); |
514 | ||
928443cd AE |
515 | clear_bit(LOSSYTX, &con->flags); /* so we retry next connect */ |
516 | clear_bit(KEEPALIVE_PENDING, &con->flags); | |
517 | clear_bit(WRITE_PENDING, &con->flags); | |
a5988c49 | 518 | |
31b8006e | 519 | reset_connection(con); |
6f2bc3ff | 520 | con->peer_global_seq = 0; |
91e45ce3 | 521 | cancel_delayed_work(&con->work); |
ec302645 | 522 | mutex_unlock(&con->mutex); |
8c50c817 SW |
523 | |
524 | /* | |
525 | * We cannot close the socket directly from here because the | |
526 | * work threads use it without holding the mutex. Instead, let | |
527 | * con_work() do it. | |
528 | */ | |
31b8006e SW |
529 | queue_con(con); |
530 | } | |
3d14c5d2 | 531 | EXPORT_SYMBOL(ceph_con_close); |
31b8006e | 532 | |
31b8006e SW |
533 | /* |
534 | * Reopen a closed connection, with a new peer address. | |
535 | */ | |
b7a9e5dd SW |
536 | void ceph_con_open(struct ceph_connection *con, |
537 | __u8 entity_type, __u64 entity_num, | |
538 | struct ceph_entity_addr *addr) | |
31b8006e | 539 | { |
5469155f | 540 | mutex_lock(&con->mutex); |
3d14c5d2 | 541 | dout("con_open %p %s\n", con, ceph_pr_addr(&addr->in_addr)); |
31b8006e | 542 | set_bit(OPENING, &con->state); |
a5988c49 AE |
543 | WARN_ON(!test_and_clear_bit(CLOSED, &con->state)); |
544 | ||
b7a9e5dd SW |
545 | con->peer_name.type = (__u8) entity_type; |
546 | con->peer_name.num = cpu_to_le64(entity_num); | |
547 | ||
31b8006e | 548 | memcpy(&con->peer_addr, addr, sizeof(*addr)); |
03c677e1 | 549 | con->delay = 0; /* reset backoff memory */ |
5469155f | 550 | mutex_unlock(&con->mutex); |
31b8006e SW |
551 | queue_con(con); |
552 | } | |
3d14c5d2 | 553 | EXPORT_SYMBOL(ceph_con_open); |
31b8006e | 554 | |
87b315a5 SW |
555 | /* |
556 | * return true if this connection ever successfully opened | |
557 | */ | |
558 | bool ceph_con_opened(struct ceph_connection *con) | |
559 | { | |
560 | return con->connect_seq > 0; | |
561 | } | |
562 | ||
31b8006e SW |
563 | /* |
564 | * initialize a new connection. | |
565 | */ | |
1bfd89f4 AE |
566 | void ceph_con_init(struct ceph_connection *con, void *private, |
567 | const struct ceph_connection_operations *ops, | |
b7a9e5dd | 568 | struct ceph_messenger *msgr) |
31b8006e SW |
569 | { |
570 | dout("con_init %p\n", con); | |
571 | memset(con, 0, sizeof(*con)); | |
1bfd89f4 AE |
572 | con->private = private; |
573 | con->ops = ops; | |
31b8006e | 574 | con->msgr = msgr; |
ce2c8903 AE |
575 | |
576 | con_sock_state_init(con); | |
577 | ||
ec302645 | 578 | mutex_init(&con->mutex); |
31b8006e SW |
579 | INIT_LIST_HEAD(&con->out_queue); |
580 | INIT_LIST_HEAD(&con->out_sent); | |
581 | INIT_DELAYED_WORK(&con->work, con_work); | |
a5988c49 AE |
582 | |
583 | set_bit(CLOSED, &con->state); | |
31b8006e | 584 | } |
3d14c5d2 | 585 | EXPORT_SYMBOL(ceph_con_init); |
31b8006e SW |
586 | |
587 | ||
588 | /* | |
589 | * We maintain a global counter to order connection attempts. Get | |
590 | * a unique seq greater than @gt. | |
591 | */ | |
592 | static u32 get_global_seq(struct ceph_messenger *msgr, u32 gt) | |
593 | { | |
594 | u32 ret; | |
595 | ||
596 | spin_lock(&msgr->global_seq_lock); | |
597 | if (msgr->global_seq < gt) | |
598 | msgr->global_seq = gt; | |
599 | ret = ++msgr->global_seq; | |
600 | spin_unlock(&msgr->global_seq_lock); | |
601 | return ret; | |
602 | } | |
603 | ||
e2200423 | 604 | static void con_out_kvec_reset(struct ceph_connection *con) |
859eb799 AE |
605 | { |
606 | con->out_kvec_left = 0; | |
607 | con->out_kvec_bytes = 0; | |
608 | con->out_kvec_cur = &con->out_kvec[0]; | |
609 | } | |
610 | ||
e2200423 | 611 | static void con_out_kvec_add(struct ceph_connection *con, |
859eb799 AE |
612 | size_t size, void *data) |
613 | { | |
614 | int index; | |
615 | ||
616 | index = con->out_kvec_left; | |
617 | BUG_ON(index >= ARRAY_SIZE(con->out_kvec)); | |
618 | ||
619 | con->out_kvec[index].iov_len = size; | |
620 | con->out_kvec[index].iov_base = data; | |
621 | con->out_kvec_left++; | |
622 | con->out_kvec_bytes += size; | |
623 | } | |
31b8006e | 624 | |
df6ad1f9 AE |
625 | #ifdef CONFIG_BLOCK |
626 | static void init_bio_iter(struct bio *bio, struct bio **iter, int *seg) | |
627 | { | |
628 | if (!bio) { | |
629 | *iter = NULL; | |
630 | *seg = 0; | |
631 | return; | |
632 | } | |
633 | *iter = bio; | |
634 | *seg = bio->bi_idx; | |
635 | } | |
636 | ||
637 | static void iter_bio_next(struct bio **bio_iter, int *seg) | |
638 | { | |
639 | if (*bio_iter == NULL) | |
640 | return; | |
641 | ||
642 | BUG_ON(*seg >= (*bio_iter)->bi_vcnt); | |
643 | ||
644 | (*seg)++; | |
645 | if (*seg == (*bio_iter)->bi_vcnt) | |
646 | init_bio_iter((*bio_iter)->bi_next, bio_iter, seg); | |
647 | } | |
648 | #endif | |
649 | ||
739c905b AE |
650 | static void prepare_write_message_data(struct ceph_connection *con) |
651 | { | |
652 | struct ceph_msg *msg = con->out_msg; | |
653 | ||
654 | BUG_ON(!msg); | |
655 | BUG_ON(!msg->hdr.data_len); | |
656 | ||
657 | /* initialize page iterator */ | |
658 | con->out_msg_pos.page = 0; | |
659 | if (msg->pages) | |
660 | con->out_msg_pos.page_pos = msg->page_alignment; | |
661 | else | |
662 | con->out_msg_pos.page_pos = 0; | |
572c588e | 663 | #ifdef CONFIG_BLOCK |
abdaa6a8 | 664 | if (msg->bio) |
572c588e AE |
665 | init_bio_iter(msg->bio, &msg->bio_iter, &msg->bio_seg); |
666 | #endif | |
739c905b AE |
667 | con->out_msg_pos.data_pos = 0; |
668 | con->out_msg_pos.did_page_crc = false; | |
669 | con->out_more = 1; /* data + footer will follow */ | |
670 | } | |
671 | ||
31b8006e SW |
672 | /* |
673 | * Prepare footer for currently outgoing message, and finish things | |
674 | * off. Assumes out_kvec* are already valid.. we just add on to the end. | |
675 | */ | |
859eb799 | 676 | static void prepare_write_message_footer(struct ceph_connection *con) |
31b8006e SW |
677 | { |
678 | struct ceph_msg *m = con->out_msg; | |
859eb799 | 679 | int v = con->out_kvec_left; |
31b8006e | 680 | |
fd154f3c AE |
681 | m->footer.flags |= CEPH_MSG_FOOTER_COMPLETE; |
682 | ||
31b8006e SW |
683 | dout("prepare_write_message_footer %p\n", con); |
684 | con->out_kvec_is_msg = true; | |
685 | con->out_kvec[v].iov_base = &m->footer; | |
686 | con->out_kvec[v].iov_len = sizeof(m->footer); | |
687 | con->out_kvec_bytes += sizeof(m->footer); | |
688 | con->out_kvec_left++; | |
689 | con->out_more = m->more_to_follow; | |
c86a2930 | 690 | con->out_msg_done = true; |
31b8006e SW |
691 | } |
692 | ||
693 | /* | |
694 | * Prepare headers for the next outgoing message. | |
695 | */ | |
696 | static void prepare_write_message(struct ceph_connection *con) | |
697 | { | |
698 | struct ceph_msg *m; | |
a9a0c51a | 699 | u32 crc; |
31b8006e | 700 | |
e2200423 | 701 | con_out_kvec_reset(con); |
31b8006e | 702 | con->out_kvec_is_msg = true; |
c86a2930 | 703 | con->out_msg_done = false; |
31b8006e SW |
704 | |
705 | /* Sneak an ack in there first? If we can get it into the same | |
706 | * TCP packet that's a good thing. */ | |
707 | if (con->in_seq > con->in_seq_acked) { | |
708 | con->in_seq_acked = con->in_seq; | |
e2200423 | 709 | con_out_kvec_add(con, sizeof (tag_ack), &tag_ack); |
31b8006e | 710 | con->out_temp_ack = cpu_to_le64(con->in_seq_acked); |
e2200423 | 711 | con_out_kvec_add(con, sizeof (con->out_temp_ack), |
859eb799 | 712 | &con->out_temp_ack); |
31b8006e SW |
713 | } |
714 | ||
38941f80 | 715 | BUG_ON(list_empty(&con->out_queue)); |
859eb799 | 716 | m = list_first_entry(&con->out_queue, struct ceph_msg, list_head); |
c86a2930 | 717 | con->out_msg = m; |
38941f80 | 718 | BUG_ON(m->con != con); |
4cf9d544 SW |
719 | |
720 | /* put message on sent list */ | |
721 | ceph_msg_get(m); | |
722 | list_move_tail(&m->list_head, &con->out_sent); | |
31b8006e | 723 | |
e84346b7 SW |
724 | /* |
725 | * only assign outgoing seq # if we haven't sent this message | |
726 | * yet. if it is requeued, resend with it's original seq. | |
727 | */ | |
728 | if (m->needs_out_seq) { | |
729 | m->hdr.seq = cpu_to_le64(++con->out_seq); | |
730 | m->needs_out_seq = false; | |
731 | } | |
31b8006e SW |
732 | |
733 | dout("prepare_write_message %p seq %lld type %d len %d+%d+%d %d pgs\n", | |
734 | m, con->out_seq, le16_to_cpu(m->hdr.type), | |
735 | le32_to_cpu(m->hdr.front_len), le32_to_cpu(m->hdr.middle_len), | |
736 | le32_to_cpu(m->hdr.data_len), | |
737 | m->nr_pages); | |
738 | BUG_ON(le32_to_cpu(m->hdr.front_len) != m->front.iov_len); | |
739 | ||
740 | /* tag + hdr + front + middle */ | |
e2200423 AE |
741 | con_out_kvec_add(con, sizeof (tag_msg), &tag_msg); |
742 | con_out_kvec_add(con, sizeof (m->hdr), &m->hdr); | |
743 | con_out_kvec_add(con, m->front.iov_len, m->front.iov_base); | |
859eb799 | 744 | |
31b8006e | 745 | if (m->middle) |
e2200423 | 746 | con_out_kvec_add(con, m->middle->vec.iov_len, |
859eb799 | 747 | m->middle->vec.iov_base); |
31b8006e SW |
748 | |
749 | /* fill in crc (except data pages), footer */ | |
a9a0c51a AE |
750 | crc = crc32c(0, &m->hdr, offsetof(struct ceph_msg_header, crc)); |
751 | con->out_msg->hdr.crc = cpu_to_le32(crc); | |
fd154f3c | 752 | con->out_msg->footer.flags = 0; |
a9a0c51a AE |
753 | |
754 | crc = crc32c(0, m->front.iov_base, m->front.iov_len); | |
755 | con->out_msg->footer.front_crc = cpu_to_le32(crc); | |
756 | if (m->middle) { | |
757 | crc = crc32c(0, m->middle->vec.iov_base, | |
758 | m->middle->vec.iov_len); | |
759 | con->out_msg->footer.middle_crc = cpu_to_le32(crc); | |
760 | } else | |
31b8006e | 761 | con->out_msg->footer.middle_crc = 0; |
739c905b | 762 | dout("%s front_crc %u middle_crc %u\n", __func__, |
31b8006e SW |
763 | le32_to_cpu(con->out_msg->footer.front_crc), |
764 | le32_to_cpu(con->out_msg->footer.middle_crc)); | |
765 | ||
766 | /* is there a data payload? */ | |
739c905b AE |
767 | con->out_msg->footer.data_crc = 0; |
768 | if (m->hdr.data_len) | |
769 | prepare_write_message_data(con); | |
770 | else | |
31b8006e | 771 | /* no, queue up footer too and be done */ |
859eb799 | 772 | prepare_write_message_footer(con); |
31b8006e | 773 | |
928443cd | 774 | set_bit(WRITE_PENDING, &con->flags); |
31b8006e SW |
775 | } |
776 | ||
777 | /* | |
778 | * Prepare an ack. | |
779 | */ | |
780 | static void prepare_write_ack(struct ceph_connection *con) | |
781 | { | |
782 | dout("prepare_write_ack %p %llu -> %llu\n", con, | |
783 | con->in_seq_acked, con->in_seq); | |
784 | con->in_seq_acked = con->in_seq; | |
785 | ||
e2200423 | 786 | con_out_kvec_reset(con); |
859eb799 | 787 | |
e2200423 | 788 | con_out_kvec_add(con, sizeof (tag_ack), &tag_ack); |
859eb799 | 789 | |
31b8006e | 790 | con->out_temp_ack = cpu_to_le64(con->in_seq_acked); |
e2200423 | 791 | con_out_kvec_add(con, sizeof (con->out_temp_ack), |
859eb799 AE |
792 | &con->out_temp_ack); |
793 | ||
31b8006e | 794 | con->out_more = 1; /* more will follow.. eventually.. */ |
928443cd | 795 | set_bit(WRITE_PENDING, &con->flags); |
31b8006e SW |
796 | } |
797 | ||
798 | /* | |
799 | * Prepare to write keepalive byte. | |
800 | */ | |
801 | static void prepare_write_keepalive(struct ceph_connection *con) | |
802 | { | |
803 | dout("prepare_write_keepalive %p\n", con); | |
e2200423 AE |
804 | con_out_kvec_reset(con); |
805 | con_out_kvec_add(con, sizeof (tag_keepalive), &tag_keepalive); | |
928443cd | 806 | set_bit(WRITE_PENDING, &con->flags); |
31b8006e SW |
807 | } |
808 | ||
809 | /* | |
810 | * Connection negotiation. | |
811 | */ | |
812 | ||
dac1e716 AE |
813 | static struct ceph_auth_handshake *get_connect_authorizer(struct ceph_connection *con, |
814 | int *auth_proto) | |
4e7a5dcd | 815 | { |
a3530df3 | 816 | struct ceph_auth_handshake *auth; |
b1c6b980 AE |
817 | |
818 | if (!con->ops->get_authorizer) { | |
819 | con->out_connect.authorizer_protocol = CEPH_AUTH_UNKNOWN; | |
820 | con->out_connect.authorizer_len = 0; | |
821 | ||
729796be | 822 | return NULL; |
b1c6b980 AE |
823 | } |
824 | ||
825 | /* Can't hold the mutex while getting authorizer */ | |
4e7a5dcd | 826 | |
ec302645 | 827 | mutex_unlock(&con->mutex); |
b1c6b980 | 828 | |
dac1e716 | 829 | auth = con->ops->get_authorizer(con, auth_proto, con->auth_retry); |
8f43fb53 | 830 | |
ec302645 | 831 | mutex_lock(&con->mutex); |
4e7a5dcd | 832 | |
a3530df3 | 833 | if (IS_ERR(auth)) |
729796be | 834 | return auth; |
928443cd | 835 | if (test_bit(CLOSED, &con->state) || test_bit(OPENING, &con->flags)) |
729796be | 836 | return ERR_PTR(-EAGAIN); |
0da5d703 | 837 | |
8f43fb53 AE |
838 | con->auth_reply_buf = auth->authorizer_reply_buf; |
839 | con->auth_reply_buf_len = auth->authorizer_reply_buf_len; | |
840 | ||
859eb799 | 841 | |
729796be | 842 | return auth; |
4e7a5dcd SW |
843 | } |
844 | ||
31b8006e SW |
845 | /* |
846 | * We connected to a peer and are saying hello. | |
847 | */ | |
e825a66d | 848 | static void prepare_write_banner(struct ceph_connection *con) |
31b8006e | 849 | { |
e2200423 AE |
850 | con_out_kvec_add(con, strlen(CEPH_BANNER), CEPH_BANNER); |
851 | con_out_kvec_add(con, sizeof (con->msgr->my_enc_addr), | |
e825a66d | 852 | &con->msgr->my_enc_addr); |
eed0ef2c | 853 | |
eed0ef2c | 854 | con->out_more = 0; |
928443cd | 855 | set_bit(WRITE_PENDING, &con->flags); |
eed0ef2c SW |
856 | } |
857 | ||
e825a66d | 858 | static int prepare_write_connect(struct ceph_connection *con) |
eed0ef2c | 859 | { |
95c96174 | 860 | unsigned int global_seq = get_global_seq(con->msgr, 0); |
31b8006e | 861 | int proto; |
dac1e716 | 862 | int auth_proto; |
729796be | 863 | struct ceph_auth_handshake *auth; |
31b8006e SW |
864 | |
865 | switch (con->peer_name.type) { | |
866 | case CEPH_ENTITY_TYPE_MON: | |
867 | proto = CEPH_MONC_PROTOCOL; | |
868 | break; | |
869 | case CEPH_ENTITY_TYPE_OSD: | |
870 | proto = CEPH_OSDC_PROTOCOL; | |
871 | break; | |
872 | case CEPH_ENTITY_TYPE_MDS: | |
873 | proto = CEPH_MDSC_PROTOCOL; | |
874 | break; | |
875 | default: | |
876 | BUG(); | |
877 | } | |
878 | ||
879 | dout("prepare_write_connect %p cseq=%d gseq=%d proto=%d\n", con, | |
880 | con->connect_seq, global_seq, proto); | |
4e7a5dcd | 881 | |
e825a66d | 882 | con->out_connect.features = cpu_to_le64(con->msgr->supported_features); |
31b8006e SW |
883 | con->out_connect.host_type = cpu_to_le32(CEPH_ENTITY_TYPE_CLIENT); |
884 | con->out_connect.connect_seq = cpu_to_le32(con->connect_seq); | |
885 | con->out_connect.global_seq = cpu_to_le32(global_seq); | |
886 | con->out_connect.protocol_version = cpu_to_le32(proto); | |
887 | con->out_connect.flags = 0; | |
31b8006e | 888 | |
dac1e716 AE |
889 | auth_proto = CEPH_AUTH_UNKNOWN; |
890 | auth = get_connect_authorizer(con, &auth_proto); | |
729796be AE |
891 | if (IS_ERR(auth)) |
892 | return PTR_ERR(auth); | |
3da54776 | 893 | |
dac1e716 | 894 | con->out_connect.authorizer_protocol = cpu_to_le32(auth_proto); |
3da54776 AE |
895 | con->out_connect.authorizer_len = auth ? |
896 | cpu_to_le32(auth->authorizer_buf_len) : 0; | |
897 | ||
ab166d5a | 898 | con_out_kvec_reset(con); |
e2200423 | 899 | con_out_kvec_add(con, sizeof (con->out_connect), |
3da54776 AE |
900 | &con->out_connect); |
901 | if (auth && auth->authorizer_buf_len) | |
e2200423 | 902 | con_out_kvec_add(con, auth->authorizer_buf_len, |
3da54776 | 903 | auth->authorizer_buf); |
859eb799 | 904 | |
31b8006e | 905 | con->out_more = 0; |
928443cd | 906 | set_bit(WRITE_PENDING, &con->flags); |
4e7a5dcd | 907 | |
e10c758e | 908 | return 0; |
31b8006e SW |
909 | } |
910 | ||
31b8006e SW |
911 | /* |
912 | * write as much of pending kvecs to the socket as we can. | |
913 | * 1 -> done | |
914 | * 0 -> socket full, but more to do | |
915 | * <0 -> error | |
916 | */ | |
917 | static int write_partial_kvec(struct ceph_connection *con) | |
918 | { | |
919 | int ret; | |
920 | ||
921 | dout("write_partial_kvec %p %d left\n", con, con->out_kvec_bytes); | |
922 | while (con->out_kvec_bytes > 0) { | |
923 | ret = ceph_tcp_sendmsg(con->sock, con->out_kvec_cur, | |
924 | con->out_kvec_left, con->out_kvec_bytes, | |
925 | con->out_more); | |
926 | if (ret <= 0) | |
927 | goto out; | |
928 | con->out_kvec_bytes -= ret; | |
929 | if (con->out_kvec_bytes == 0) | |
930 | break; /* done */ | |
f42299e6 AE |
931 | |
932 | /* account for full iov entries consumed */ | |
933 | while (ret >= con->out_kvec_cur->iov_len) { | |
934 | BUG_ON(!con->out_kvec_left); | |
935 | ret -= con->out_kvec_cur->iov_len; | |
936 | con->out_kvec_cur++; | |
937 | con->out_kvec_left--; | |
938 | } | |
939 | /* and for a partially-consumed entry */ | |
940 | if (ret) { | |
941 | con->out_kvec_cur->iov_len -= ret; | |
942 | con->out_kvec_cur->iov_base += ret; | |
31b8006e SW |
943 | } |
944 | } | |
945 | con->out_kvec_left = 0; | |
946 | con->out_kvec_is_msg = false; | |
947 | ret = 1; | |
948 | out: | |
949 | dout("write_partial_kvec %p %d left in %d kvecs ret = %d\n", con, | |
950 | con->out_kvec_bytes, con->out_kvec_left, ret); | |
951 | return ret; /* done! */ | |
952 | } | |
953 | ||
84ca8fc8 AE |
954 | static void out_msg_pos_next(struct ceph_connection *con, struct page *page, |
955 | size_t len, size_t sent, bool in_trail) | |
956 | { | |
957 | struct ceph_msg *msg = con->out_msg; | |
958 | ||
959 | BUG_ON(!msg); | |
960 | BUG_ON(!sent); | |
961 | ||
962 | con->out_msg_pos.data_pos += sent; | |
963 | con->out_msg_pos.page_pos += sent; | |
5821bd8c AE |
964 | if (sent < len) |
965 | return; | |
966 | ||
967 | BUG_ON(sent != len); | |
968 | con->out_msg_pos.page_pos = 0; | |
969 | con->out_msg_pos.page++; | |
970 | con->out_msg_pos.did_page_crc = false; | |
971 | if (in_trail) | |
972 | list_move_tail(&page->lru, | |
973 | &msg->trail->head); | |
974 | else if (msg->pagelist) | |
975 | list_move_tail(&page->lru, | |
976 | &msg->pagelist->head); | |
84ca8fc8 | 977 | #ifdef CONFIG_BLOCK |
5821bd8c AE |
978 | else if (msg->bio) |
979 | iter_bio_next(&msg->bio_iter, &msg->bio_seg); | |
84ca8fc8 | 980 | #endif |
84ca8fc8 AE |
981 | } |
982 | ||
31b8006e SW |
983 | /* |
984 | * Write as much message data payload as we can. If we finish, queue | |
985 | * up the footer. | |
986 | * 1 -> done, footer is now queued in out_kvec[]. | |
987 | * 0 -> socket full, but more to do | |
988 | * <0 -> error | |
989 | */ | |
990 | static int write_partial_msg_pages(struct ceph_connection *con) | |
991 | { | |
992 | struct ceph_msg *msg = con->out_msg; | |
95c96174 | 993 | unsigned int data_len = le32_to_cpu(msg->hdr.data_len); |
31b8006e | 994 | size_t len; |
37675b0f | 995 | bool do_datacrc = !con->msgr->nocrc; |
31b8006e | 996 | int ret; |
68b4476b | 997 | int total_max_write; |
84ca8fc8 | 998 | bool in_trail = false; |
5821bd8c AE |
999 | const size_t trail_len = (msg->trail ? msg->trail->length : 0); |
1000 | const size_t trail_off = data_len - trail_len; | |
31b8006e SW |
1001 | |
1002 | dout("write_partial_msg_pages %p msg %p page %d/%d offset %d\n", | |
84ca8fc8 | 1003 | con, msg, con->out_msg_pos.page, msg->nr_pages, |
31b8006e SW |
1004 | con->out_msg_pos.page_pos); |
1005 | ||
5821bd8c AE |
1006 | /* |
1007 | * Iterate through each page that contains data to be | |
1008 | * written, and send as much as possible for each. | |
1009 | * | |
1010 | * If we are calculating the data crc (the default), we will | |
1011 | * need to map the page. If we have no pages, they have | |
1012 | * been revoked, so use the zero page. | |
1013 | */ | |
68b4476b | 1014 | while (data_len > con->out_msg_pos.data_pos) { |
31b8006e | 1015 | struct page *page = NULL; |
68b4476b | 1016 | int max_write = PAGE_SIZE; |
9bd19663 | 1017 | int bio_offset = 0; |
68b4476b | 1018 | |
5821bd8c AE |
1019 | in_trail = in_trail || con->out_msg_pos.data_pos >= trail_off; |
1020 | if (!in_trail) | |
1021 | total_max_write = trail_off - con->out_msg_pos.data_pos; | |
68b4476b | 1022 | |
5821bd8c | 1023 | if (in_trail) { |
68b4476b YS |
1024 | total_max_write = data_len - con->out_msg_pos.data_pos; |
1025 | ||
1026 | page = list_first_entry(&msg->trail->head, | |
1027 | struct page, lru); | |
68b4476b | 1028 | } else if (msg->pages) { |
31b8006e | 1029 | page = msg->pages[con->out_msg_pos.page]; |
58bb3b37 SW |
1030 | } else if (msg->pagelist) { |
1031 | page = list_first_entry(&msg->pagelist->head, | |
1032 | struct page, lru); | |
68b4476b YS |
1033 | #ifdef CONFIG_BLOCK |
1034 | } else if (msg->bio) { | |
1035 | struct bio_vec *bv; | |
1036 | ||
1037 | bv = bio_iovec_idx(msg->bio_iter, msg->bio_seg); | |
1038 | page = bv->bv_page; | |
9bd19663 | 1039 | bio_offset = bv->bv_offset; |
68b4476b YS |
1040 | max_write = bv->bv_len; |
1041 | #endif | |
31b8006e | 1042 | } else { |
57666519 | 1043 | page = zero_page; |
31b8006e | 1044 | } |
68b4476b YS |
1045 | len = min_t(int, max_write - con->out_msg_pos.page_pos, |
1046 | total_max_write); | |
1047 | ||
37675b0f | 1048 | if (do_datacrc && !con->out_msg_pos.did_page_crc) { |
9bd19663 | 1049 | void *base; |
5821bd8c | 1050 | u32 crc = le32_to_cpu(msg->footer.data_crc); |
8d63e318 | 1051 | char *kaddr; |
31b8006e | 1052 | |
8d63e318 | 1053 | kaddr = kmap(page); |
31b8006e | 1054 | BUG_ON(kaddr == NULL); |
9bd19663 | 1055 | base = kaddr + con->out_msg_pos.page_pos + bio_offset; |
5821bd8c | 1056 | crc = crc32c(crc, base, len); |
84ca8fc8 | 1057 | msg->footer.data_crc = cpu_to_le32(crc); |
bca064d2 | 1058 | con->out_msg_pos.did_page_crc = true; |
31b8006e | 1059 | } |
e36b13cc | 1060 | ret = ceph_tcp_sendpage(con->sock, page, |
9bd19663 | 1061 | con->out_msg_pos.page_pos + bio_offset, |
e36b13cc | 1062 | len, 1); |
31b8006e | 1063 | |
0cdf9e60 | 1064 | if (do_datacrc) |
31b8006e SW |
1065 | kunmap(page); |
1066 | ||
1067 | if (ret <= 0) | |
1068 | goto out; | |
1069 | ||
84ca8fc8 | 1070 | out_msg_pos_next(con, page, len, (size_t) ret, in_trail); |
31b8006e SW |
1071 | } |
1072 | ||
1073 | dout("write_partial_msg_pages %p msg %p done\n", con, msg); | |
1074 | ||
1075 | /* prepare and queue up footer, too */ | |
37675b0f | 1076 | if (!do_datacrc) |
84ca8fc8 | 1077 | msg->footer.flags |= CEPH_MSG_FOOTER_NOCRC; |
e2200423 | 1078 | con_out_kvec_reset(con); |
859eb799 | 1079 | prepare_write_message_footer(con); |
31b8006e SW |
1080 | ret = 1; |
1081 | out: | |
1082 | return ret; | |
1083 | } | |
1084 | ||
1085 | /* | |
1086 | * write some zeros | |
1087 | */ | |
1088 | static int write_partial_skip(struct ceph_connection *con) | |
1089 | { | |
1090 | int ret; | |
1091 | ||
1092 | while (con->out_skip > 0) { | |
31739139 | 1093 | size_t size = min(con->out_skip, (int) PAGE_CACHE_SIZE); |
31b8006e | 1094 | |
31739139 | 1095 | ret = ceph_tcp_sendpage(con->sock, zero_page, 0, size, 1); |
31b8006e SW |
1096 | if (ret <= 0) |
1097 | goto out; | |
1098 | con->out_skip -= ret; | |
1099 | } | |
1100 | ret = 1; | |
1101 | out: | |
1102 | return ret; | |
1103 | } | |
1104 | ||
1105 | /* | |
1106 | * Prepare to read connection handshake, or an ack. | |
1107 | */ | |
eed0ef2c SW |
1108 | static void prepare_read_banner(struct ceph_connection *con) |
1109 | { | |
1110 | dout("prepare_read_banner %p\n", con); | |
1111 | con->in_base_pos = 0; | |
1112 | } | |
1113 | ||
31b8006e SW |
1114 | static void prepare_read_connect(struct ceph_connection *con) |
1115 | { | |
1116 | dout("prepare_read_connect %p\n", con); | |
1117 | con->in_base_pos = 0; | |
1118 | } | |
1119 | ||
1120 | static void prepare_read_ack(struct ceph_connection *con) | |
1121 | { | |
1122 | dout("prepare_read_ack %p\n", con); | |
1123 | con->in_base_pos = 0; | |
1124 | } | |
1125 | ||
1126 | static void prepare_read_tag(struct ceph_connection *con) | |
1127 | { | |
1128 | dout("prepare_read_tag %p\n", con); | |
1129 | con->in_base_pos = 0; | |
1130 | con->in_tag = CEPH_MSGR_TAG_READY; | |
1131 | } | |
1132 | ||
1133 | /* | |
1134 | * Prepare to read a message. | |
1135 | */ | |
1136 | static int prepare_read_message(struct ceph_connection *con) | |
1137 | { | |
1138 | dout("prepare_read_message %p\n", con); | |
1139 | BUG_ON(con->in_msg != NULL); | |
1140 | con->in_base_pos = 0; | |
1141 | con->in_front_crc = con->in_middle_crc = con->in_data_crc = 0; | |
1142 | return 0; | |
1143 | } | |
1144 | ||
1145 | ||
1146 | static int read_partial(struct ceph_connection *con, | |
fd51653f | 1147 | int end, int size, void *object) |
31b8006e | 1148 | { |
e6cee71f AE |
1149 | while (con->in_base_pos < end) { |
1150 | int left = end - con->in_base_pos; | |
31b8006e SW |
1151 | int have = size - left; |
1152 | int ret = ceph_tcp_recvmsg(con->sock, object + have, left); | |
1153 | if (ret <= 0) | |
1154 | return ret; | |
1155 | con->in_base_pos += ret; | |
1156 | } | |
1157 | return 1; | |
1158 | } | |
1159 | ||
1160 | ||
1161 | /* | |
1162 | * Read all or part of the connect-side handshake on a new connection | |
1163 | */ | |
eed0ef2c | 1164 | static int read_partial_banner(struct ceph_connection *con) |
31b8006e | 1165 | { |
fd51653f AE |
1166 | int size; |
1167 | int end; | |
1168 | int ret; | |
31b8006e | 1169 | |
eed0ef2c | 1170 | dout("read_partial_banner %p at %d\n", con, con->in_base_pos); |
31b8006e SW |
1171 | |
1172 | /* peer's banner */ | |
fd51653f AE |
1173 | size = strlen(CEPH_BANNER); |
1174 | end = size; | |
1175 | ret = read_partial(con, end, size, con->in_banner); | |
31b8006e SW |
1176 | if (ret <= 0) |
1177 | goto out; | |
fd51653f AE |
1178 | |
1179 | size = sizeof (con->actual_peer_addr); | |
1180 | end += size; | |
1181 | ret = read_partial(con, end, size, &con->actual_peer_addr); | |
31b8006e SW |
1182 | if (ret <= 0) |
1183 | goto out; | |
fd51653f AE |
1184 | |
1185 | size = sizeof (con->peer_addr_for_me); | |
1186 | end += size; | |
1187 | ret = read_partial(con, end, size, &con->peer_addr_for_me); | |
31b8006e SW |
1188 | if (ret <= 0) |
1189 | goto out; | |
fd51653f | 1190 | |
eed0ef2c SW |
1191 | out: |
1192 | return ret; | |
1193 | } | |
1194 | ||
1195 | static int read_partial_connect(struct ceph_connection *con) | |
1196 | { | |
fd51653f AE |
1197 | int size; |
1198 | int end; | |
1199 | int ret; | |
eed0ef2c SW |
1200 | |
1201 | dout("read_partial_connect %p at %d\n", con, con->in_base_pos); | |
1202 | ||
fd51653f AE |
1203 | size = sizeof (con->in_reply); |
1204 | end = size; | |
1205 | ret = read_partial(con, end, size, &con->in_reply); | |
31b8006e SW |
1206 | if (ret <= 0) |
1207 | goto out; | |
fd51653f AE |
1208 | |
1209 | size = le32_to_cpu(con->in_reply.authorizer_len); | |
1210 | end += size; | |
1211 | ret = read_partial(con, end, size, con->auth_reply_buf); | |
4e7a5dcd SW |
1212 | if (ret <= 0) |
1213 | goto out; | |
31b8006e | 1214 | |
4e7a5dcd SW |
1215 | dout("read_partial_connect %p tag %d, con_seq = %u, g_seq = %u\n", |
1216 | con, (int)con->in_reply.tag, | |
1217 | le32_to_cpu(con->in_reply.connect_seq), | |
31b8006e SW |
1218 | le32_to_cpu(con->in_reply.global_seq)); |
1219 | out: | |
1220 | return ret; | |
eed0ef2c | 1221 | |
31b8006e SW |
1222 | } |
1223 | ||
1224 | /* | |
1225 | * Verify the hello banner looks okay. | |
1226 | */ | |
1227 | static int verify_hello(struct ceph_connection *con) | |
1228 | { | |
1229 | if (memcmp(con->in_banner, CEPH_BANNER, strlen(CEPH_BANNER))) { | |
13e38c8a | 1230 | pr_err("connect to %s got bad banner\n", |
3d14c5d2 | 1231 | ceph_pr_addr(&con->peer_addr.in_addr)); |
31b8006e SW |
1232 | con->error_msg = "protocol error, bad banner"; |
1233 | return -1; | |
1234 | } | |
1235 | return 0; | |
1236 | } | |
1237 | ||
1238 | static bool addr_is_blank(struct sockaddr_storage *ss) | |
1239 | { | |
1240 | switch (ss->ss_family) { | |
1241 | case AF_INET: | |
1242 | return ((struct sockaddr_in *)ss)->sin_addr.s_addr == 0; | |
1243 | case AF_INET6: | |
1244 | return | |
1245 | ((struct sockaddr_in6 *)ss)->sin6_addr.s6_addr32[0] == 0 && | |
1246 | ((struct sockaddr_in6 *)ss)->sin6_addr.s6_addr32[1] == 0 && | |
1247 | ((struct sockaddr_in6 *)ss)->sin6_addr.s6_addr32[2] == 0 && | |
1248 | ((struct sockaddr_in6 *)ss)->sin6_addr.s6_addr32[3] == 0; | |
1249 | } | |
1250 | return false; | |
1251 | } | |
1252 | ||
1253 | static int addr_port(struct sockaddr_storage *ss) | |
1254 | { | |
1255 | switch (ss->ss_family) { | |
1256 | case AF_INET: | |
f28bcfbe | 1257 | return ntohs(((struct sockaddr_in *)ss)->sin_port); |
31b8006e | 1258 | case AF_INET6: |
f28bcfbe | 1259 | return ntohs(((struct sockaddr_in6 *)ss)->sin6_port); |
31b8006e SW |
1260 | } |
1261 | return 0; | |
1262 | } | |
1263 | ||
1264 | static void addr_set_port(struct sockaddr_storage *ss, int p) | |
1265 | { | |
1266 | switch (ss->ss_family) { | |
1267 | case AF_INET: | |
1268 | ((struct sockaddr_in *)ss)->sin_port = htons(p); | |
a2a79609 | 1269 | break; |
31b8006e SW |
1270 | case AF_INET6: |
1271 | ((struct sockaddr_in6 *)ss)->sin6_port = htons(p); | |
a2a79609 | 1272 | break; |
31b8006e SW |
1273 | } |
1274 | } | |
1275 | ||
ee3b56f2 NW |
1276 | /* |
1277 | * Unlike other *_pton function semantics, zero indicates success. | |
1278 | */ | |
1279 | static int ceph_pton(const char *str, size_t len, struct sockaddr_storage *ss, | |
1280 | char delim, const char **ipend) | |
1281 | { | |
99f0f3b2 AE |
1282 | struct sockaddr_in *in4 = (struct sockaddr_in *) ss; |
1283 | struct sockaddr_in6 *in6 = (struct sockaddr_in6 *) ss; | |
ee3b56f2 NW |
1284 | |
1285 | memset(ss, 0, sizeof(*ss)); | |
1286 | ||
1287 | if (in4_pton(str, len, (u8 *)&in4->sin_addr.s_addr, delim, ipend)) { | |
1288 | ss->ss_family = AF_INET; | |
1289 | return 0; | |
1290 | } | |
1291 | ||
1292 | if (in6_pton(str, len, (u8 *)&in6->sin6_addr.s6_addr, delim, ipend)) { | |
1293 | ss->ss_family = AF_INET6; | |
1294 | return 0; | |
1295 | } | |
1296 | ||
1297 | return -EINVAL; | |
1298 | } | |
1299 | ||
1300 | /* | |
1301 | * Extract hostname string and resolve using kernel DNS facility. | |
1302 | */ | |
1303 | #ifdef CONFIG_CEPH_LIB_USE_DNS_RESOLVER | |
1304 | static int ceph_dns_resolve_name(const char *name, size_t namelen, | |
1305 | struct sockaddr_storage *ss, char delim, const char **ipend) | |
1306 | { | |
1307 | const char *end, *delim_p; | |
1308 | char *colon_p, *ip_addr = NULL; | |
1309 | int ip_len, ret; | |
1310 | ||
1311 | /* | |
1312 | * The end of the hostname occurs immediately preceding the delimiter or | |
1313 | * the port marker (':') where the delimiter takes precedence. | |
1314 | */ | |
1315 | delim_p = memchr(name, delim, namelen); | |
1316 | colon_p = memchr(name, ':', namelen); | |
1317 | ||
1318 | if (delim_p && colon_p) | |
1319 | end = delim_p < colon_p ? delim_p : colon_p; | |
1320 | else if (!delim_p && colon_p) | |
1321 | end = colon_p; | |
1322 | else { | |
1323 | end = delim_p; | |
1324 | if (!end) /* case: hostname:/ */ | |
1325 | end = name + namelen; | |
1326 | } | |
1327 | ||
1328 | if (end <= name) | |
1329 | return -EINVAL; | |
1330 | ||
1331 | /* do dns_resolve upcall */ | |
1332 | ip_len = dns_query(NULL, name, end - name, NULL, &ip_addr, NULL); | |
1333 | if (ip_len > 0) | |
1334 | ret = ceph_pton(ip_addr, ip_len, ss, -1, NULL); | |
1335 | else | |
1336 | ret = -ESRCH; | |
1337 | ||
1338 | kfree(ip_addr); | |
1339 | ||
1340 | *ipend = end; | |
1341 | ||
1342 | pr_info("resolve '%.*s' (ret=%d): %s\n", (int)(end - name), name, | |
1343 | ret, ret ? "failed" : ceph_pr_addr(ss)); | |
1344 | ||
1345 | return ret; | |
1346 | } | |
1347 | #else | |
1348 | static inline int ceph_dns_resolve_name(const char *name, size_t namelen, | |
1349 | struct sockaddr_storage *ss, char delim, const char **ipend) | |
1350 | { | |
1351 | return -EINVAL; | |
1352 | } | |
1353 | #endif | |
1354 | ||
1355 | /* | |
1356 | * Parse a server name (IP or hostname). If a valid IP address is not found | |
1357 | * then try to extract a hostname to resolve using userspace DNS upcall. | |
1358 | */ | |
1359 | static int ceph_parse_server_name(const char *name, size_t namelen, | |
1360 | struct sockaddr_storage *ss, char delim, const char **ipend) | |
1361 | { | |
1362 | int ret; | |
1363 | ||
1364 | ret = ceph_pton(name, namelen, ss, delim, ipend); | |
1365 | if (ret) | |
1366 | ret = ceph_dns_resolve_name(name, namelen, ss, delim, ipend); | |
1367 | ||
1368 | return ret; | |
1369 | } | |
1370 | ||
31b8006e SW |
1371 | /* |
1372 | * Parse an ip[:port] list into an addr array. Use the default | |
1373 | * monitor port if a port isn't specified. | |
1374 | */ | |
1375 | int ceph_parse_ips(const char *c, const char *end, | |
1376 | struct ceph_entity_addr *addr, | |
1377 | int max_count, int *count) | |
1378 | { | |
ee3b56f2 | 1379 | int i, ret = -EINVAL; |
31b8006e SW |
1380 | const char *p = c; |
1381 | ||
1382 | dout("parse_ips on '%.*s'\n", (int)(end-c), c); | |
1383 | for (i = 0; i < max_count; i++) { | |
1384 | const char *ipend; | |
1385 | struct sockaddr_storage *ss = &addr[i].in_addr; | |
31b8006e | 1386 | int port; |
39139f64 SW |
1387 | char delim = ','; |
1388 | ||
1389 | if (*p == '[') { | |
1390 | delim = ']'; | |
1391 | p++; | |
1392 | } | |
31b8006e | 1393 | |
ee3b56f2 NW |
1394 | ret = ceph_parse_server_name(p, end - p, ss, delim, &ipend); |
1395 | if (ret) | |
31b8006e | 1396 | goto bad; |
ee3b56f2 NW |
1397 | ret = -EINVAL; |
1398 | ||
31b8006e SW |
1399 | p = ipend; |
1400 | ||
39139f64 SW |
1401 | if (delim == ']') { |
1402 | if (*p != ']') { | |
1403 | dout("missing matching ']'\n"); | |
1404 | goto bad; | |
1405 | } | |
1406 | p++; | |
1407 | } | |
1408 | ||
31b8006e SW |
1409 | /* port? */ |
1410 | if (p < end && *p == ':') { | |
1411 | port = 0; | |
1412 | p++; | |
1413 | while (p < end && *p >= '0' && *p <= '9') { | |
1414 | port = (port * 10) + (*p - '0'); | |
1415 | p++; | |
1416 | } | |
1417 | if (port > 65535 || port == 0) | |
1418 | goto bad; | |
1419 | } else { | |
1420 | port = CEPH_MON_PORT; | |
1421 | } | |
1422 | ||
1423 | addr_set_port(ss, port); | |
1424 | ||
3d14c5d2 | 1425 | dout("parse_ips got %s\n", ceph_pr_addr(ss)); |
31b8006e SW |
1426 | |
1427 | if (p == end) | |
1428 | break; | |
1429 | if (*p != ',') | |
1430 | goto bad; | |
1431 | p++; | |
1432 | } | |
1433 | ||
1434 | if (p != end) | |
1435 | goto bad; | |
1436 | ||
1437 | if (count) | |
1438 | *count = i + 1; | |
1439 | return 0; | |
1440 | ||
1441 | bad: | |
39139f64 | 1442 | pr_err("parse_ips bad ip '%.*s'\n", (int)(end - c), c); |
ee3b56f2 | 1443 | return ret; |
31b8006e | 1444 | } |
3d14c5d2 | 1445 | EXPORT_SYMBOL(ceph_parse_ips); |
31b8006e | 1446 | |
eed0ef2c | 1447 | static int process_banner(struct ceph_connection *con) |
31b8006e | 1448 | { |
eed0ef2c | 1449 | dout("process_banner on %p\n", con); |
31b8006e SW |
1450 | |
1451 | if (verify_hello(con) < 0) | |
1452 | return -1; | |
1453 | ||
63f2d211 SW |
1454 | ceph_decode_addr(&con->actual_peer_addr); |
1455 | ceph_decode_addr(&con->peer_addr_for_me); | |
1456 | ||
31b8006e SW |
1457 | /* |
1458 | * Make sure the other end is who we wanted. note that the other | |
1459 | * end may not yet know their ip address, so if it's 0.0.0.0, give | |
1460 | * them the benefit of the doubt. | |
1461 | */ | |
103e2d3a SW |
1462 | if (memcmp(&con->peer_addr, &con->actual_peer_addr, |
1463 | sizeof(con->peer_addr)) != 0 && | |
31b8006e SW |
1464 | !(addr_is_blank(&con->actual_peer_addr.in_addr) && |
1465 | con->actual_peer_addr.nonce == con->peer_addr.nonce)) { | |
cd84db6e | 1466 | pr_warning("wrong peer, want %s/%d, got %s/%d\n", |
3d14c5d2 | 1467 | ceph_pr_addr(&con->peer_addr.in_addr), |
cd84db6e | 1468 | (int)le32_to_cpu(con->peer_addr.nonce), |
3d14c5d2 | 1469 | ceph_pr_addr(&con->actual_peer_addr.in_addr), |
cd84db6e | 1470 | (int)le32_to_cpu(con->actual_peer_addr.nonce)); |
58bb3b37 | 1471 | con->error_msg = "wrong peer at address"; |
31b8006e SW |
1472 | return -1; |
1473 | } | |
1474 | ||
1475 | /* | |
1476 | * did we learn our address? | |
1477 | */ | |
1478 | if (addr_is_blank(&con->msgr->inst.addr.in_addr)) { | |
1479 | int port = addr_port(&con->msgr->inst.addr.in_addr); | |
1480 | ||
1481 | memcpy(&con->msgr->inst.addr.in_addr, | |
1482 | &con->peer_addr_for_me.in_addr, | |
1483 | sizeof(con->peer_addr_for_me.in_addr)); | |
1484 | addr_set_port(&con->msgr->inst.addr.in_addr, port); | |
63f2d211 | 1485 | encode_my_addr(con->msgr); |
eed0ef2c | 1486 | dout("process_banner learned my addr is %s\n", |
3d14c5d2 | 1487 | ceph_pr_addr(&con->msgr->inst.addr.in_addr)); |
31b8006e SW |
1488 | } |
1489 | ||
eed0ef2c SW |
1490 | return 0; |
1491 | } | |
1492 | ||
04a419f9 SW |
1493 | static void fail_protocol(struct ceph_connection *con) |
1494 | { | |
1495 | reset_connection(con); | |
1496 | set_bit(CLOSED, &con->state); /* in case there's queued work */ | |
04a419f9 SW |
1497 | } |
1498 | ||
eed0ef2c SW |
1499 | static int process_connect(struct ceph_connection *con) |
1500 | { | |
3d14c5d2 YS |
1501 | u64 sup_feat = con->msgr->supported_features; |
1502 | u64 req_feat = con->msgr->required_features; | |
04a419f9 | 1503 | u64 server_feat = le64_to_cpu(con->in_reply.features); |
0da5d703 | 1504 | int ret; |
04a419f9 | 1505 | |
eed0ef2c SW |
1506 | dout("process_connect on %p tag %d\n", con, (int)con->in_tag); |
1507 | ||
31b8006e | 1508 | switch (con->in_reply.tag) { |
04a419f9 SW |
1509 | case CEPH_MSGR_TAG_FEATURES: |
1510 | pr_err("%s%lld %s feature set mismatch," | |
1511 | " my %llx < server's %llx, missing %llx\n", | |
1512 | ENTITY_NAME(con->peer_name), | |
3d14c5d2 | 1513 | ceph_pr_addr(&con->peer_addr.in_addr), |
04a419f9 SW |
1514 | sup_feat, server_feat, server_feat & ~sup_feat); |
1515 | con->error_msg = "missing required protocol features"; | |
1516 | fail_protocol(con); | |
1517 | return -1; | |
1518 | ||
31b8006e | 1519 | case CEPH_MSGR_TAG_BADPROTOVER: |
31b8006e SW |
1520 | pr_err("%s%lld %s protocol version mismatch," |
1521 | " my %d != server's %d\n", | |
1522 | ENTITY_NAME(con->peer_name), | |
3d14c5d2 | 1523 | ceph_pr_addr(&con->peer_addr.in_addr), |
31b8006e SW |
1524 | le32_to_cpu(con->out_connect.protocol_version), |
1525 | le32_to_cpu(con->in_reply.protocol_version)); | |
1526 | con->error_msg = "protocol version mismatch"; | |
04a419f9 | 1527 | fail_protocol(con); |
31b8006e SW |
1528 | return -1; |
1529 | ||
4e7a5dcd SW |
1530 | case CEPH_MSGR_TAG_BADAUTHORIZER: |
1531 | con->auth_retry++; | |
1532 | dout("process_connect %p got BADAUTHORIZER attempt %d\n", con, | |
1533 | con->auth_retry); | |
1534 | if (con->auth_retry == 2) { | |
1535 | con->error_msg = "connect authorization failure"; | |
4e7a5dcd SW |
1536 | return -1; |
1537 | } | |
1538 | con->auth_retry = 1; | |
e825a66d | 1539 | ret = prepare_write_connect(con); |
0da5d703 SW |
1540 | if (ret < 0) |
1541 | return ret; | |
63733a0f | 1542 | prepare_read_connect(con); |
4e7a5dcd | 1543 | break; |
31b8006e SW |
1544 | |
1545 | case CEPH_MSGR_TAG_RESETSESSION: | |
1546 | /* | |
1547 | * If we connected with a large connect_seq but the peer | |
1548 | * has no record of a session with us (no connection, or | |
1549 | * connect_seq == 0), they will send RESETSESION to indicate | |
1550 | * that they must have reset their session, and may have | |
1551 | * dropped messages. | |
1552 | */ | |
1553 | dout("process_connect got RESET peer seq %u\n", | |
a16cb1f7 | 1554 | le32_to_cpu(con->in_reply.connect_seq)); |
31b8006e SW |
1555 | pr_err("%s%lld %s connection reset\n", |
1556 | ENTITY_NAME(con->peer_name), | |
3d14c5d2 | 1557 | ceph_pr_addr(&con->peer_addr.in_addr)); |
31b8006e | 1558 | reset_connection(con); |
5a0f8fdd AE |
1559 | ret = prepare_write_connect(con); |
1560 | if (ret < 0) | |
1561 | return ret; | |
31b8006e SW |
1562 | prepare_read_connect(con); |
1563 | ||
1564 | /* Tell ceph about it. */ | |
ec302645 | 1565 | mutex_unlock(&con->mutex); |
31b8006e SW |
1566 | pr_info("reset on %s%lld\n", ENTITY_NAME(con->peer_name)); |
1567 | if (con->ops->peer_reset) | |
1568 | con->ops->peer_reset(con); | |
ec302645 | 1569 | mutex_lock(&con->mutex); |
0da5d703 SW |
1570 | if (test_bit(CLOSED, &con->state) || |
1571 | test_bit(OPENING, &con->state)) | |
1572 | return -EAGAIN; | |
31b8006e SW |
1573 | break; |
1574 | ||
1575 | case CEPH_MSGR_TAG_RETRY_SESSION: | |
1576 | /* | |
1577 | * If we sent a smaller connect_seq than the peer has, try | |
1578 | * again with a larger value. | |
1579 | */ | |
a16cb1f7 | 1580 | dout("process_connect got RETRY_SESSION my seq %u, peer %u\n", |
31b8006e | 1581 | le32_to_cpu(con->out_connect.connect_seq), |
a16cb1f7 SW |
1582 | le32_to_cpu(con->in_reply.connect_seq)); |
1583 | con->connect_seq = le32_to_cpu(con->in_reply.connect_seq); | |
5a0f8fdd AE |
1584 | ret = prepare_write_connect(con); |
1585 | if (ret < 0) | |
1586 | return ret; | |
31b8006e SW |
1587 | prepare_read_connect(con); |
1588 | break; | |
1589 | ||
1590 | case CEPH_MSGR_TAG_RETRY_GLOBAL: | |
1591 | /* | |
1592 | * If we sent a smaller global_seq than the peer has, try | |
1593 | * again with a larger value. | |
1594 | */ | |
eed0ef2c | 1595 | dout("process_connect got RETRY_GLOBAL my %u peer_gseq %u\n", |
31b8006e | 1596 | con->peer_global_seq, |
a16cb1f7 | 1597 | le32_to_cpu(con->in_reply.global_seq)); |
31b8006e | 1598 | get_global_seq(con->msgr, |
a16cb1f7 | 1599 | le32_to_cpu(con->in_reply.global_seq)); |
5a0f8fdd AE |
1600 | ret = prepare_write_connect(con); |
1601 | if (ret < 0) | |
1602 | return ret; | |
31b8006e SW |
1603 | prepare_read_connect(con); |
1604 | break; | |
1605 | ||
1606 | case CEPH_MSGR_TAG_READY: | |
04a419f9 SW |
1607 | if (req_feat & ~server_feat) { |
1608 | pr_err("%s%lld %s protocol feature mismatch," | |
1609 | " my required %llx > server's %llx, need %llx\n", | |
1610 | ENTITY_NAME(con->peer_name), | |
3d14c5d2 | 1611 | ceph_pr_addr(&con->peer_addr.in_addr), |
04a419f9 SW |
1612 | req_feat, server_feat, req_feat & ~server_feat); |
1613 | con->error_msg = "missing required protocol features"; | |
1614 | fail_protocol(con); | |
1615 | return -1; | |
1616 | } | |
3ec50d18 | 1617 | clear_bit(NEGOTIATING, &con->state); |
e27947c7 | 1618 | set_bit(CONNECTED, &con->state); |
31b8006e SW |
1619 | con->peer_global_seq = le32_to_cpu(con->in_reply.global_seq); |
1620 | con->connect_seq++; | |
aba558e2 | 1621 | con->peer_features = server_feat; |
31b8006e SW |
1622 | dout("process_connect got READY gseq %d cseq %d (%d)\n", |
1623 | con->peer_global_seq, | |
1624 | le32_to_cpu(con->in_reply.connect_seq), | |
1625 | con->connect_seq); | |
1626 | WARN_ON(con->connect_seq != | |
1627 | le32_to_cpu(con->in_reply.connect_seq)); | |
92ac41d0 SW |
1628 | |
1629 | if (con->in_reply.flags & CEPH_MSG_CONNECT_LOSSY) | |
928443cd | 1630 | set_bit(LOSSYTX, &con->flags); |
92ac41d0 | 1631 | |
31b8006e SW |
1632 | prepare_read_tag(con); |
1633 | break; | |
1634 | ||
1635 | case CEPH_MSGR_TAG_WAIT: | |
1636 | /* | |
1637 | * If there is a connection race (we are opening | |
1638 | * connections to each other), one of us may just have | |
1639 | * to WAIT. This shouldn't happen if we are the | |
1640 | * client. | |
1641 | */ | |
04177882 SW |
1642 | pr_err("process_connect got WAIT as client\n"); |
1643 | con->error_msg = "protocol error, got WAIT as client"; | |
1644 | return -1; | |
31b8006e SW |
1645 | |
1646 | default: | |
1647 | pr_err("connect protocol error, will retry\n"); | |
1648 | con->error_msg = "protocol error, garbage tag during connect"; | |
1649 | return -1; | |
1650 | } | |
1651 | return 0; | |
1652 | } | |
1653 | ||
1654 | ||
1655 | /* | |
1656 | * read (part of) an ack | |
1657 | */ | |
1658 | static int read_partial_ack(struct ceph_connection *con) | |
1659 | { | |
fd51653f AE |
1660 | int size = sizeof (con->in_temp_ack); |
1661 | int end = size; | |
1662 | ||
1663 | return read_partial(con, end, size, &con->in_temp_ack); | |
31b8006e SW |
1664 | } |
1665 | ||
1666 | ||
1667 | /* | |
1668 | * We can finally discard anything that's been acked. | |
1669 | */ | |
1670 | static void process_ack(struct ceph_connection *con) | |
1671 | { | |
1672 | struct ceph_msg *m; | |
1673 | u64 ack = le64_to_cpu(con->in_temp_ack); | |
1674 | u64 seq; | |
1675 | ||
31b8006e SW |
1676 | while (!list_empty(&con->out_sent)) { |
1677 | m = list_first_entry(&con->out_sent, struct ceph_msg, | |
1678 | list_head); | |
1679 | seq = le64_to_cpu(m->hdr.seq); | |
1680 | if (seq > ack) | |
1681 | break; | |
1682 | dout("got ack for seq %llu type %d at %p\n", seq, | |
1683 | le16_to_cpu(m->hdr.type), m); | |
4cf9d544 | 1684 | m->ack_stamp = jiffies; |
31b8006e SW |
1685 | ceph_msg_remove(m); |
1686 | } | |
31b8006e SW |
1687 | prepare_read_tag(con); |
1688 | } | |
1689 | ||
1690 | ||
1691 | ||
1692 | ||
2450418c | 1693 | static int read_partial_message_section(struct ceph_connection *con, |
213c99ee SW |
1694 | struct kvec *section, |
1695 | unsigned int sec_len, u32 *crc) | |
2450418c | 1696 | { |
68b4476b | 1697 | int ret, left; |
2450418c YS |
1698 | |
1699 | BUG_ON(!section); | |
1700 | ||
1701 | while (section->iov_len < sec_len) { | |
1702 | BUG_ON(section->iov_base == NULL); | |
1703 | left = sec_len - section->iov_len; | |
1704 | ret = ceph_tcp_recvmsg(con->sock, (char *)section->iov_base + | |
1705 | section->iov_len, left); | |
1706 | if (ret <= 0) | |
1707 | return ret; | |
1708 | section->iov_len += ret; | |
2450418c | 1709 | } |
fe3ad593 AE |
1710 | if (section->iov_len == sec_len) |
1711 | *crc = crc32c(0, section->iov_base, section->iov_len); | |
31b8006e | 1712 | |
2450418c YS |
1713 | return 1; |
1714 | } | |
31b8006e | 1715 | |
1c20f2d2 AE |
1716 | static bool ceph_con_in_msg_alloc(struct ceph_connection *con, |
1717 | struct ceph_msg_header *hdr); | |
68b4476b YS |
1718 | |
1719 | ||
1720 | static int read_partial_message_pages(struct ceph_connection *con, | |
1721 | struct page **pages, | |
95c96174 | 1722 | unsigned int data_len, bool do_datacrc) |
68b4476b YS |
1723 | { |
1724 | void *p; | |
1725 | int ret; | |
1726 | int left; | |
1727 | ||
1728 | left = min((int)(data_len - con->in_msg_pos.data_pos), | |
1729 | (int)(PAGE_SIZE - con->in_msg_pos.page_pos)); | |
1730 | /* (page) data */ | |
1731 | BUG_ON(pages == NULL); | |
1732 | p = kmap(pages[con->in_msg_pos.page]); | |
1733 | ret = ceph_tcp_recvmsg(con->sock, p + con->in_msg_pos.page_pos, | |
1734 | left); | |
bca064d2 | 1735 | if (ret > 0 && do_datacrc) |
68b4476b YS |
1736 | con->in_data_crc = |
1737 | crc32c(con->in_data_crc, | |
1738 | p + con->in_msg_pos.page_pos, ret); | |
1739 | kunmap(pages[con->in_msg_pos.page]); | |
1740 | if (ret <= 0) | |
1741 | return ret; | |
1742 | con->in_msg_pos.data_pos += ret; | |
1743 | con->in_msg_pos.page_pos += ret; | |
1744 | if (con->in_msg_pos.page_pos == PAGE_SIZE) { | |
1745 | con->in_msg_pos.page_pos = 0; | |
1746 | con->in_msg_pos.page++; | |
1747 | } | |
1748 | ||
1749 | return ret; | |
1750 | } | |
1751 | ||
1752 | #ifdef CONFIG_BLOCK | |
1753 | static int read_partial_message_bio(struct ceph_connection *con, | |
1754 | struct bio **bio_iter, int *bio_seg, | |
95c96174 | 1755 | unsigned int data_len, bool do_datacrc) |
68b4476b YS |
1756 | { |
1757 | struct bio_vec *bv = bio_iovec_idx(*bio_iter, *bio_seg); | |
1758 | void *p; | |
1759 | int ret, left; | |
1760 | ||
68b4476b YS |
1761 | left = min((int)(data_len - con->in_msg_pos.data_pos), |
1762 | (int)(bv->bv_len - con->in_msg_pos.page_pos)); | |
1763 | ||
1764 | p = kmap(bv->bv_page) + bv->bv_offset; | |
1765 | ||
1766 | ret = ceph_tcp_recvmsg(con->sock, p + con->in_msg_pos.page_pos, | |
1767 | left); | |
bca064d2 | 1768 | if (ret > 0 && do_datacrc) |
68b4476b YS |
1769 | con->in_data_crc = |
1770 | crc32c(con->in_data_crc, | |
1771 | p + con->in_msg_pos.page_pos, ret); | |
1772 | kunmap(bv->bv_page); | |
1773 | if (ret <= 0) | |
1774 | return ret; | |
1775 | con->in_msg_pos.data_pos += ret; | |
1776 | con->in_msg_pos.page_pos += ret; | |
1777 | if (con->in_msg_pos.page_pos == bv->bv_len) { | |
1778 | con->in_msg_pos.page_pos = 0; | |
1779 | iter_bio_next(bio_iter, bio_seg); | |
1780 | } | |
1781 | ||
1782 | return ret; | |
1783 | } | |
1784 | #endif | |
1785 | ||
31b8006e SW |
1786 | /* |
1787 | * read (part of) a message. | |
1788 | */ | |
1789 | static int read_partial_message(struct ceph_connection *con) | |
1790 | { | |
1791 | struct ceph_msg *m = con->in_msg; | |
fd51653f AE |
1792 | int size; |
1793 | int end; | |
31b8006e | 1794 | int ret; |
95c96174 | 1795 | unsigned int front_len, middle_len, data_len; |
37675b0f | 1796 | bool do_datacrc = !con->msgr->nocrc; |
ae18756b | 1797 | u64 seq; |
fe3ad593 | 1798 | u32 crc; |
31b8006e SW |
1799 | |
1800 | dout("read_partial_message con %p msg %p\n", con, m); | |
1801 | ||
1802 | /* header */ | |
fd51653f AE |
1803 | size = sizeof (con->in_hdr); |
1804 | end = size; | |
1805 | ret = read_partial(con, end, size, &con->in_hdr); | |
57dac9d1 AE |
1806 | if (ret <= 0) |
1807 | return ret; | |
fe3ad593 AE |
1808 | |
1809 | crc = crc32c(0, &con->in_hdr, offsetof(struct ceph_msg_header, crc)); | |
1810 | if (cpu_to_le32(crc) != con->in_hdr.crc) { | |
1811 | pr_err("read_partial_message bad hdr " | |
1812 | " crc %u != expected %u\n", | |
1813 | crc, con->in_hdr.crc); | |
1814 | return -EBADMSG; | |
1815 | } | |
1816 | ||
31b8006e SW |
1817 | front_len = le32_to_cpu(con->in_hdr.front_len); |
1818 | if (front_len > CEPH_MSG_MAX_FRONT_LEN) | |
1819 | return -EIO; | |
1820 | middle_len = le32_to_cpu(con->in_hdr.middle_len); | |
1821 | if (middle_len > CEPH_MSG_MAX_DATA_LEN) | |
1822 | return -EIO; | |
1823 | data_len = le32_to_cpu(con->in_hdr.data_len); | |
1824 | if (data_len > CEPH_MSG_MAX_DATA_LEN) | |
1825 | return -EIO; | |
1826 | ||
ae18756b SW |
1827 | /* verify seq# */ |
1828 | seq = le64_to_cpu(con->in_hdr.seq); | |
1829 | if ((s64)seq - (s64)con->in_seq < 1) { | |
df9f86fa | 1830 | pr_info("skipping %s%lld %s seq %lld expected %lld\n", |
ae18756b | 1831 | ENTITY_NAME(con->peer_name), |
3d14c5d2 | 1832 | ceph_pr_addr(&con->peer_addr.in_addr), |
ae18756b SW |
1833 | seq, con->in_seq + 1); |
1834 | con->in_base_pos = -front_len - middle_len - data_len - | |
1835 | sizeof(m->footer); | |
1836 | con->in_tag = CEPH_MSGR_TAG_READY; | |
ae18756b SW |
1837 | return 0; |
1838 | } else if ((s64)seq - (s64)con->in_seq > 1) { | |
1839 | pr_err("read_partial_message bad seq %lld expected %lld\n", | |
1840 | seq, con->in_seq + 1); | |
1841 | con->error_msg = "bad message sequence # for incoming message"; | |
1842 | return -EBADMSG; | |
1843 | } | |
1844 | ||
31b8006e SW |
1845 | /* allocate message? */ |
1846 | if (!con->in_msg) { | |
1847 | dout("got hdr type %d front %d data %d\n", con->in_hdr.type, | |
1848 | con->in_hdr.front_len, con->in_hdr.data_len); | |
1c20f2d2 | 1849 | if (ceph_con_in_msg_alloc(con, &con->in_hdr)) { |
31b8006e | 1850 | /* skip this message */ |
a79832f2 | 1851 | dout("alloc_msg said skip message\n"); |
ae32be31 | 1852 | BUG_ON(con->in_msg); |
31b8006e SW |
1853 | con->in_base_pos = -front_len - middle_len - data_len - |
1854 | sizeof(m->footer); | |
1855 | con->in_tag = CEPH_MSGR_TAG_READY; | |
684be25c | 1856 | con->in_seq++; |
31b8006e SW |
1857 | return 0; |
1858 | } | |
a79832f2 | 1859 | if (!con->in_msg) { |
5b3a4db3 SW |
1860 | con->error_msg = |
1861 | "error allocating memory for incoming message"; | |
a79832f2 | 1862 | return -ENOMEM; |
31b8006e | 1863 | } |
38941f80 AE |
1864 | |
1865 | BUG_ON(con->in_msg->con != con); | |
31b8006e SW |
1866 | m = con->in_msg; |
1867 | m->front.iov_len = 0; /* haven't read it yet */ | |
2450418c YS |
1868 | if (m->middle) |
1869 | m->middle->vec.iov_len = 0; | |
9d7f0f13 YS |
1870 | |
1871 | con->in_msg_pos.page = 0; | |
68b4476b | 1872 | if (m->pages) |
c5c6b19d | 1873 | con->in_msg_pos.page_pos = m->page_alignment; |
68b4476b YS |
1874 | else |
1875 | con->in_msg_pos.page_pos = 0; | |
9d7f0f13 | 1876 | con->in_msg_pos.data_pos = 0; |
a4107026 SW |
1877 | |
1878 | #ifdef CONFIG_BLOCK | |
1879 | if (m->bio) | |
1880 | init_bio_iter(m->bio, &m->bio_iter, &m->bio_seg); | |
1881 | #endif | |
31b8006e SW |
1882 | } |
1883 | ||
1884 | /* front */ | |
2450418c YS |
1885 | ret = read_partial_message_section(con, &m->front, front_len, |
1886 | &con->in_front_crc); | |
1887 | if (ret <= 0) | |
1888 | return ret; | |
31b8006e SW |
1889 | |
1890 | /* middle */ | |
2450418c | 1891 | if (m->middle) { |
213c99ee SW |
1892 | ret = read_partial_message_section(con, &m->middle->vec, |
1893 | middle_len, | |
2450418c | 1894 | &con->in_middle_crc); |
31b8006e SW |
1895 | if (ret <= 0) |
1896 | return ret; | |
31b8006e SW |
1897 | } |
1898 | ||
1899 | /* (page) data */ | |
31b8006e | 1900 | while (con->in_msg_pos.data_pos < data_len) { |
68b4476b YS |
1901 | if (m->pages) { |
1902 | ret = read_partial_message_pages(con, m->pages, | |
bca064d2 | 1903 | data_len, do_datacrc); |
68b4476b YS |
1904 | if (ret <= 0) |
1905 | return ret; | |
1906 | #ifdef CONFIG_BLOCK | |
1907 | } else if (m->bio) { | |
a4107026 | 1908 | BUG_ON(!m->bio_iter); |
68b4476b YS |
1909 | ret = read_partial_message_bio(con, |
1910 | &m->bio_iter, &m->bio_seg, | |
bca064d2 | 1911 | data_len, do_datacrc); |
68b4476b YS |
1912 | if (ret <= 0) |
1913 | return ret; | |
1914 | #endif | |
1915 | } else { | |
1916 | BUG_ON(1); | |
31b8006e SW |
1917 | } |
1918 | } | |
1919 | ||
31b8006e | 1920 | /* footer */ |
fd51653f AE |
1921 | size = sizeof (m->footer); |
1922 | end += size; | |
1923 | ret = read_partial(con, end, size, &m->footer); | |
57dac9d1 AE |
1924 | if (ret <= 0) |
1925 | return ret; | |
1926 | ||
31b8006e SW |
1927 | dout("read_partial_message got msg %p %d (%u) + %d (%u) + %d (%u)\n", |
1928 | m, front_len, m->footer.front_crc, middle_len, | |
1929 | m->footer.middle_crc, data_len, m->footer.data_crc); | |
1930 | ||
1931 | /* crc ok? */ | |
1932 | if (con->in_front_crc != le32_to_cpu(m->footer.front_crc)) { | |
1933 | pr_err("read_partial_message %p front crc %u != exp. %u\n", | |
1934 | m, con->in_front_crc, m->footer.front_crc); | |
1935 | return -EBADMSG; | |
1936 | } | |
1937 | if (con->in_middle_crc != le32_to_cpu(m->footer.middle_crc)) { | |
1938 | pr_err("read_partial_message %p middle crc %u != exp %u\n", | |
1939 | m, con->in_middle_crc, m->footer.middle_crc); | |
1940 | return -EBADMSG; | |
1941 | } | |
bca064d2 | 1942 | if (do_datacrc && |
31b8006e SW |
1943 | (m->footer.flags & CEPH_MSG_FOOTER_NOCRC) == 0 && |
1944 | con->in_data_crc != le32_to_cpu(m->footer.data_crc)) { | |
1945 | pr_err("read_partial_message %p data crc %u != exp. %u\n", m, | |
1946 | con->in_data_crc, le32_to_cpu(m->footer.data_crc)); | |
1947 | return -EBADMSG; | |
1948 | } | |
1949 | ||
1950 | return 1; /* done! */ | |
1951 | } | |
1952 | ||
1953 | /* | |
1954 | * Process message. This happens in the worker thread. The callback should | |
1955 | * be careful not to do anything that waits on other incoming messages or it | |
1956 | * may deadlock. | |
1957 | */ | |
1958 | static void process_message(struct ceph_connection *con) | |
1959 | { | |
5e095e8b | 1960 | struct ceph_msg *msg; |
31b8006e | 1961 | |
38941f80 AE |
1962 | BUG_ON(con->in_msg->con != con); |
1963 | con->in_msg->con = NULL; | |
5e095e8b | 1964 | msg = con->in_msg; |
31b8006e | 1965 | con->in_msg = NULL; |
36eb71aa | 1966 | con->ops->put(con); |
31b8006e SW |
1967 | |
1968 | /* if first message, set peer_name */ | |
1969 | if (con->peer_name.type == 0) | |
dbad185d | 1970 | con->peer_name = msg->hdr.src; |
31b8006e | 1971 | |
31b8006e | 1972 | con->in_seq++; |
ec302645 | 1973 | mutex_unlock(&con->mutex); |
31b8006e SW |
1974 | |
1975 | dout("===== %p %llu from %s%lld %d=%s len %d+%d (%u %u %u) =====\n", | |
1976 | msg, le64_to_cpu(msg->hdr.seq), | |
dbad185d | 1977 | ENTITY_NAME(msg->hdr.src), |
31b8006e SW |
1978 | le16_to_cpu(msg->hdr.type), |
1979 | ceph_msg_type_name(le16_to_cpu(msg->hdr.type)), | |
1980 | le32_to_cpu(msg->hdr.front_len), | |
1981 | le32_to_cpu(msg->hdr.data_len), | |
1982 | con->in_front_crc, con->in_middle_crc, con->in_data_crc); | |
1983 | con->ops->dispatch(con, msg); | |
ec302645 SW |
1984 | |
1985 | mutex_lock(&con->mutex); | |
31b8006e SW |
1986 | prepare_read_tag(con); |
1987 | } | |
1988 | ||
1989 | ||
1990 | /* | |
1991 | * Write something to the socket. Called in a worker thread when the | |
1992 | * socket appears to be writeable and we have something ready to send. | |
1993 | */ | |
1994 | static int try_write(struct ceph_connection *con) | |
1995 | { | |
31b8006e SW |
1996 | int ret = 1; |
1997 | ||
d59315ca | 1998 | dout("try_write start %p state %lu\n", con, con->state); |
31b8006e | 1999 | |
31b8006e SW |
2000 | more: |
2001 | dout("try_write out_kvec_bytes %d\n", con->out_kvec_bytes); | |
2002 | ||
2003 | /* open the socket first? */ | |
2004 | if (con->sock == NULL) { | |
a5988c49 AE |
2005 | set_bit(CONNECTING, &con->state); |
2006 | ||
e2200423 | 2007 | con_out_kvec_reset(con); |
e825a66d | 2008 | prepare_write_banner(con); |
eed0ef2c | 2009 | prepare_read_banner(con); |
31b8006e | 2010 | |
cf3e5c40 | 2011 | BUG_ON(con->in_msg); |
31b8006e SW |
2012 | con->in_tag = CEPH_MSGR_TAG_READY; |
2013 | dout("try_write initiating connect on %p new state %lu\n", | |
2014 | con, con->state); | |
41617d0c AE |
2015 | ret = ceph_tcp_connect(con); |
2016 | if (ret < 0) { | |
31b8006e | 2017 | con->error_msg = "connect error"; |
31b8006e SW |
2018 | goto out; |
2019 | } | |
2020 | } | |
2021 | ||
2022 | more_kvec: | |
2023 | /* kvec data queued? */ | |
2024 | if (con->out_skip) { | |
2025 | ret = write_partial_skip(con); | |
2026 | if (ret <= 0) | |
42961d23 | 2027 | goto out; |
31b8006e SW |
2028 | } |
2029 | if (con->out_kvec_left) { | |
2030 | ret = write_partial_kvec(con); | |
2031 | if (ret <= 0) | |
42961d23 | 2032 | goto out; |
31b8006e SW |
2033 | } |
2034 | ||
2035 | /* msg pages? */ | |
2036 | if (con->out_msg) { | |
c86a2930 SW |
2037 | if (con->out_msg_done) { |
2038 | ceph_msg_put(con->out_msg); | |
2039 | con->out_msg = NULL; /* we're done with this one */ | |
2040 | goto do_next; | |
2041 | } | |
2042 | ||
31b8006e SW |
2043 | ret = write_partial_msg_pages(con); |
2044 | if (ret == 1) | |
2045 | goto more_kvec; /* we need to send the footer, too! */ | |
2046 | if (ret == 0) | |
42961d23 | 2047 | goto out; |
31b8006e SW |
2048 | if (ret < 0) { |
2049 | dout("try_write write_partial_msg_pages err %d\n", | |
2050 | ret); | |
42961d23 | 2051 | goto out; |
31b8006e SW |
2052 | } |
2053 | } | |
2054 | ||
c86a2930 | 2055 | do_next: |
7593af92 AE |
2056 | if (!test_bit(CONNECTING, &con->state) && |
2057 | !test_bit(NEGOTIATING, &con->state)) { | |
31b8006e SW |
2058 | /* is anything else pending? */ |
2059 | if (!list_empty(&con->out_queue)) { | |
2060 | prepare_write_message(con); | |
2061 | goto more; | |
2062 | } | |
2063 | if (con->in_seq > con->in_seq_acked) { | |
2064 | prepare_write_ack(con); | |
2065 | goto more; | |
2066 | } | |
928443cd | 2067 | if (test_and_clear_bit(KEEPALIVE_PENDING, &con->flags)) { |
31b8006e SW |
2068 | prepare_write_keepalive(con); |
2069 | goto more; | |
2070 | } | |
2071 | } | |
2072 | ||
2073 | /* Nothing to do! */ | |
928443cd | 2074 | clear_bit(WRITE_PENDING, &con->flags); |
31b8006e | 2075 | dout("try_write nothing else to write.\n"); |
31b8006e SW |
2076 | ret = 0; |
2077 | out: | |
42961d23 | 2078 | dout("try_write done on %p ret %d\n", con, ret); |
31b8006e SW |
2079 | return ret; |
2080 | } | |
2081 | ||
2082 | ||
2083 | ||
2084 | /* | |
2085 | * Read what we can from the socket. | |
2086 | */ | |
2087 | static int try_read(struct ceph_connection *con) | |
2088 | { | |
31b8006e SW |
2089 | int ret = -1; |
2090 | ||
2091 | if (!con->sock) | |
2092 | return 0; | |
2093 | ||
2094 | if (test_bit(STANDBY, &con->state)) | |
2095 | return 0; | |
2096 | ||
2097 | dout("try_read start on %p\n", con); | |
ec302645 | 2098 | |
31b8006e SW |
2099 | more: |
2100 | dout("try_read tag %d in_base_pos %d\n", (int)con->in_tag, | |
2101 | con->in_base_pos); | |
0da5d703 SW |
2102 | |
2103 | /* | |
2104 | * process_connect and process_message drop and re-take | |
2105 | * con->mutex. make sure we handle a racing close or reopen. | |
2106 | */ | |
2107 | if (test_bit(CLOSED, &con->state) || | |
2108 | test_bit(OPENING, &con->state)) { | |
2109 | ret = -EAGAIN; | |
2110 | goto out; | |
2111 | } | |
2112 | ||
31b8006e | 2113 | if (test_bit(CONNECTING, &con->state)) { |
7593af92 AE |
2114 | dout("try_read connecting\n"); |
2115 | ret = read_partial_banner(con); | |
2116 | if (ret <= 0) | |
ab166d5a | 2117 | goto out; |
7593af92 AE |
2118 | ret = process_banner(con); |
2119 | if (ret < 0) | |
2120 | goto out; | |
2121 | ||
2122 | clear_bit(CONNECTING, &con->state); | |
2123 | set_bit(NEGOTIATING, &con->state); | |
2124 | ||
2125 | /* Banner is good, exchange connection info */ | |
2126 | ret = prepare_write_connect(con); | |
2127 | if (ret < 0) | |
2128 | goto out; | |
2129 | prepare_read_connect(con); | |
2130 | ||
2131 | /* Send connection info before awaiting response */ | |
2132 | goto out; | |
2133 | } | |
2134 | ||
2135 | if (test_bit(NEGOTIATING, &con->state)) { | |
2136 | dout("try_read negotiating\n"); | |
31b8006e SW |
2137 | ret = read_partial_connect(con); |
2138 | if (ret <= 0) | |
31b8006e | 2139 | goto out; |
98bdb0aa SW |
2140 | ret = process_connect(con); |
2141 | if (ret < 0) | |
2142 | goto out; | |
31b8006e SW |
2143 | goto more; |
2144 | } | |
2145 | ||
2146 | if (con->in_base_pos < 0) { | |
2147 | /* | |
2148 | * skipping + discarding content. | |
2149 | * | |
2150 | * FIXME: there must be a better way to do this! | |
2151 | */ | |
84495f49 AE |
2152 | static char buf[SKIP_BUF_SIZE]; |
2153 | int skip = min((int) sizeof (buf), -con->in_base_pos); | |
2154 | ||
31b8006e SW |
2155 | dout("skipping %d / %d bytes\n", skip, -con->in_base_pos); |
2156 | ret = ceph_tcp_recvmsg(con->sock, buf, skip); | |
2157 | if (ret <= 0) | |
98bdb0aa | 2158 | goto out; |
31b8006e SW |
2159 | con->in_base_pos += ret; |
2160 | if (con->in_base_pos) | |
2161 | goto more; | |
2162 | } | |
2163 | if (con->in_tag == CEPH_MSGR_TAG_READY) { | |
2164 | /* | |
2165 | * what's next? | |
2166 | */ | |
2167 | ret = ceph_tcp_recvmsg(con->sock, &con->in_tag, 1); | |
2168 | if (ret <= 0) | |
98bdb0aa | 2169 | goto out; |
31b8006e SW |
2170 | dout("try_read got tag %d\n", (int)con->in_tag); |
2171 | switch (con->in_tag) { | |
2172 | case CEPH_MSGR_TAG_MSG: | |
2173 | prepare_read_message(con); | |
2174 | break; | |
2175 | case CEPH_MSGR_TAG_ACK: | |
2176 | prepare_read_ack(con); | |
2177 | break; | |
2178 | case CEPH_MSGR_TAG_CLOSE: | |
e27947c7 | 2179 | clear_bit(CONNECTED, &con->state); |
31b8006e | 2180 | set_bit(CLOSED, &con->state); /* fixme */ |
98bdb0aa | 2181 | goto out; |
31b8006e SW |
2182 | default: |
2183 | goto bad_tag; | |
2184 | } | |
2185 | } | |
2186 | if (con->in_tag == CEPH_MSGR_TAG_MSG) { | |
2187 | ret = read_partial_message(con); | |
2188 | if (ret <= 0) { | |
2189 | switch (ret) { | |
2190 | case -EBADMSG: | |
2191 | con->error_msg = "bad crc"; | |
2192 | ret = -EIO; | |
98bdb0aa | 2193 | break; |
31b8006e SW |
2194 | case -EIO: |
2195 | con->error_msg = "io error"; | |
98bdb0aa | 2196 | break; |
31b8006e | 2197 | } |
98bdb0aa | 2198 | goto out; |
31b8006e SW |
2199 | } |
2200 | if (con->in_tag == CEPH_MSGR_TAG_READY) | |
2201 | goto more; | |
2202 | process_message(con); | |
2203 | goto more; | |
2204 | } | |
2205 | if (con->in_tag == CEPH_MSGR_TAG_ACK) { | |
2206 | ret = read_partial_ack(con); | |
2207 | if (ret <= 0) | |
98bdb0aa | 2208 | goto out; |
31b8006e SW |
2209 | process_ack(con); |
2210 | goto more; | |
2211 | } | |
2212 | ||
31b8006e | 2213 | out: |
98bdb0aa | 2214 | dout("try_read done on %p ret %d\n", con, ret); |
31b8006e SW |
2215 | return ret; |
2216 | ||
2217 | bad_tag: | |
2218 | pr_err("try_read bad con->in_tag = %d\n", (int)con->in_tag); | |
2219 | con->error_msg = "protocol error, garbage tag"; | |
2220 | ret = -1; | |
2221 | goto out; | |
2222 | } | |
2223 | ||
2224 | ||
2225 | /* | |
2226 | * Atomically queue work on a connection. Bump @con reference to | |
2227 | * avoid races with connection teardown. | |
31b8006e SW |
2228 | */ |
2229 | static void queue_con(struct ceph_connection *con) | |
2230 | { | |
31b8006e SW |
2231 | if (!con->ops->get(con)) { |
2232 | dout("queue_con %p ref count 0\n", con); | |
2233 | return; | |
2234 | } | |
2235 | ||
f363e45f | 2236 | if (!queue_delayed_work(ceph_msgr_wq, &con->work, 0)) { |
31b8006e SW |
2237 | dout("queue_con %p - already queued\n", con); |
2238 | con->ops->put(con); | |
2239 | } else { | |
2240 | dout("queue_con %p\n", con); | |
2241 | } | |
2242 | } | |
2243 | ||
2244 | /* | |
2245 | * Do some work on a connection. Drop a connection ref when we're done. | |
2246 | */ | |
2247 | static void con_work(struct work_struct *work) | |
2248 | { | |
2249 | struct ceph_connection *con = container_of(work, struct ceph_connection, | |
2250 | work.work); | |
0da5d703 | 2251 | int ret; |
31b8006e | 2252 | |
9dd4658d | 2253 | mutex_lock(&con->mutex); |
0da5d703 | 2254 | restart: |
188048bc | 2255 | if (test_and_clear_bit(SOCK_CLOSED, &con->flags)) { |
e27947c7 AE |
2256 | if (test_and_clear_bit(CONNECTED, &con->state)) |
2257 | con->error_msg = "socket closed"; | |
7593af92 AE |
2258 | else if (test_and_clear_bit(NEGOTIATING, &con->state)) |
2259 | con->error_msg = "negotiation failed"; | |
2260 | else if (test_and_clear_bit(CONNECTING, &con->state)) | |
188048bc | 2261 | con->error_msg = "connection failed"; |
7593af92 | 2262 | else |
e27947c7 | 2263 | con->error_msg = "unrecognized con state"; |
188048bc AE |
2264 | goto fault; |
2265 | } | |
2266 | ||
928443cd | 2267 | if (test_and_clear_bit(BACKOFF, &con->flags)) { |
60bf8bf8 SW |
2268 | dout("con_work %p backing off\n", con); |
2269 | if (queue_delayed_work(ceph_msgr_wq, &con->work, | |
2270 | round_jiffies_relative(con->delay))) { | |
2271 | dout("con_work %p backoff %lu\n", con, con->delay); | |
2272 | mutex_unlock(&con->mutex); | |
2273 | return; | |
2274 | } else { | |
2275 | con->ops->put(con); | |
2276 | dout("con_work %p FAILED to back off %lu\n", con, | |
2277 | con->delay); | |
2278 | } | |
2279 | } | |
9dd4658d | 2280 | |
e00de341 SW |
2281 | if (test_bit(STANDBY, &con->state)) { |
2282 | dout("con_work %p STANDBY\n", con); | |
2283 | goto done; | |
2284 | } | |
31b8006e SW |
2285 | if (test_bit(CLOSED, &con->state)) { /* e.g. if we are replaced */ |
2286 | dout("con_work CLOSED\n"); | |
2287 | con_close_socket(con); | |
2288 | goto done; | |
2289 | } | |
2290 | if (test_and_clear_bit(OPENING, &con->state)) { | |
2291 | /* reopen w/ new peer */ | |
2292 | dout("con_work OPENING\n"); | |
2293 | con_close_socket(con); | |
2294 | } | |
2295 | ||
0da5d703 SW |
2296 | ret = try_read(con); |
2297 | if (ret == -EAGAIN) | |
2298 | goto restart; | |
3a140a0d SW |
2299 | if (ret < 0) { |
2300 | con->error_msg = "socket error on read"; | |
0da5d703 | 2301 | goto fault; |
3a140a0d | 2302 | } |
0da5d703 SW |
2303 | |
2304 | ret = try_write(con); | |
2305 | if (ret == -EAGAIN) | |
2306 | goto restart; | |
3a140a0d SW |
2307 | if (ret < 0) { |
2308 | con->error_msg = "socket error on write"; | |
0da5d703 | 2309 | goto fault; |
3a140a0d | 2310 | } |
31b8006e SW |
2311 | |
2312 | done: | |
9dd4658d | 2313 | mutex_unlock(&con->mutex); |
9dd4658d | 2314 | done_unlocked: |
31b8006e | 2315 | con->ops->put(con); |
0da5d703 SW |
2316 | return; |
2317 | ||
2318 | fault: | |
2319 | mutex_unlock(&con->mutex); | |
2320 | ceph_fault(con); /* error/fault path */ | |
2321 | goto done_unlocked; | |
31b8006e SW |
2322 | } |
2323 | ||
2324 | ||
2325 | /* | |
2326 | * Generic error/fault handler. A retry mechanism is used with | |
2327 | * exponential backoff | |
2328 | */ | |
2329 | static void ceph_fault(struct ceph_connection *con) | |
2330 | { | |
2331 | pr_err("%s%lld %s %s\n", ENTITY_NAME(con->peer_name), | |
3d14c5d2 | 2332 | ceph_pr_addr(&con->peer_addr.in_addr), con->error_msg); |
31b8006e | 2333 | dout("fault %p state %lu to peer %s\n", |
3d14c5d2 | 2334 | con, con->state, ceph_pr_addr(&con->peer_addr.in_addr)); |
31b8006e | 2335 | |
928443cd | 2336 | if (test_bit(LOSSYTX, &con->flags)) { |
31b8006e SW |
2337 | dout("fault on LOSSYTX channel\n"); |
2338 | goto out; | |
2339 | } | |
2340 | ||
ec302645 | 2341 | mutex_lock(&con->mutex); |
91e45ce3 SW |
2342 | if (test_bit(CLOSED, &con->state)) |
2343 | goto out_unlock; | |
ec302645 | 2344 | |
31b8006e | 2345 | con_close_socket(con); |
5e095e8b SW |
2346 | |
2347 | if (con->in_msg) { | |
38941f80 AE |
2348 | BUG_ON(con->in_msg->con != con); |
2349 | con->in_msg->con = NULL; | |
5e095e8b SW |
2350 | ceph_msg_put(con->in_msg); |
2351 | con->in_msg = NULL; | |
36eb71aa | 2352 | con->ops->put(con); |
5e095e8b | 2353 | } |
31b8006e | 2354 | |
e80a52d1 SW |
2355 | /* Requeue anything that hasn't been acked */ |
2356 | list_splice_init(&con->out_sent, &con->out_queue); | |
9bd2e6f8 | 2357 | |
e76661d0 SW |
2358 | /* If there are no messages queued or keepalive pending, place |
2359 | * the connection in a STANDBY state */ | |
2360 | if (list_empty(&con->out_queue) && | |
928443cd | 2361 | !test_bit(KEEPALIVE_PENDING, &con->flags)) { |
e00de341 | 2362 | dout("fault %p setting STANDBY clearing WRITE_PENDING\n", con); |
928443cd | 2363 | clear_bit(WRITE_PENDING, &con->flags); |
31b8006e | 2364 | set_bit(STANDBY, &con->state); |
e80a52d1 SW |
2365 | } else { |
2366 | /* retry after a delay. */ | |
2367 | if (con->delay == 0) | |
2368 | con->delay = BASE_DELAY_INTERVAL; | |
2369 | else if (con->delay < MAX_DELAY_INTERVAL) | |
2370 | con->delay *= 2; | |
e80a52d1 SW |
2371 | con->ops->get(con); |
2372 | if (queue_delayed_work(ceph_msgr_wq, &con->work, | |
60bf8bf8 SW |
2373 | round_jiffies_relative(con->delay))) { |
2374 | dout("fault queued %p delay %lu\n", con, con->delay); | |
2375 | } else { | |
e80a52d1 | 2376 | con->ops->put(con); |
60bf8bf8 SW |
2377 | dout("fault failed to queue %p delay %lu, backoff\n", |
2378 | con, con->delay); | |
2379 | /* | |
2380 | * In many cases we see a socket state change | |
2381 | * while con_work is running and end up | |
2382 | * queuing (non-delayed) work, such that we | |
2383 | * can't backoff with a delay. Set a flag so | |
2384 | * that when con_work restarts we schedule the | |
2385 | * delay then. | |
2386 | */ | |
928443cd | 2387 | set_bit(BACKOFF, &con->flags); |
60bf8bf8 | 2388 | } |
31b8006e SW |
2389 | } |
2390 | ||
91e45ce3 SW |
2391 | out_unlock: |
2392 | mutex_unlock(&con->mutex); | |
31b8006e | 2393 | out: |
161fd65a SW |
2394 | /* |
2395 | * in case we faulted due to authentication, invalidate our | |
2396 | * current tickets so that we can get new ones. | |
213c99ee | 2397 | */ |
161fd65a SW |
2398 | if (con->auth_retry && con->ops->invalidate_authorizer) { |
2399 | dout("calling invalidate_authorizer()\n"); | |
2400 | con->ops->invalidate_authorizer(con); | |
2401 | } | |
2402 | ||
31b8006e SW |
2403 | if (con->ops->fault) |
2404 | con->ops->fault(con); | |
2405 | } | |
2406 | ||
2407 | ||
2408 | ||
2409 | /* | |
15d9882c | 2410 | * initialize a new messenger instance |
31b8006e | 2411 | */ |
15d9882c AE |
2412 | void ceph_messenger_init(struct ceph_messenger *msgr, |
2413 | struct ceph_entity_addr *myaddr, | |
2414 | u32 supported_features, | |
2415 | u32 required_features, | |
2416 | bool nocrc) | |
31b8006e | 2417 | { |
3d14c5d2 YS |
2418 | msgr->supported_features = supported_features; |
2419 | msgr->required_features = required_features; | |
2420 | ||
31b8006e SW |
2421 | spin_lock_init(&msgr->global_seq_lock); |
2422 | ||
31b8006e SW |
2423 | if (myaddr) |
2424 | msgr->inst.addr = *myaddr; | |
2425 | ||
2426 | /* select a random nonce */ | |
ac8839d7 | 2427 | msgr->inst.addr.type = 0; |
103e2d3a | 2428 | get_random_bytes(&msgr->inst.addr.nonce, sizeof(msgr->inst.addr.nonce)); |
63f2d211 | 2429 | encode_my_addr(msgr); |
15d9882c | 2430 | msgr->nocrc = nocrc; |
31b8006e | 2431 | |
a2a32584 GH |
2432 | atomic_set(&msgr->stopping, 0); |
2433 | ||
15d9882c | 2434 | dout("%s %p\n", __func__, msgr); |
31b8006e | 2435 | } |
15d9882c | 2436 | EXPORT_SYMBOL(ceph_messenger_init); |
31b8006e | 2437 | |
e00de341 SW |
2438 | static void clear_standby(struct ceph_connection *con) |
2439 | { | |
2440 | /* come back from STANDBY? */ | |
2441 | if (test_and_clear_bit(STANDBY, &con->state)) { | |
2442 | mutex_lock(&con->mutex); | |
2443 | dout("clear_standby %p and ++connect_seq\n", con); | |
2444 | con->connect_seq++; | |
928443cd AE |
2445 | WARN_ON(test_bit(WRITE_PENDING, &con->flags)); |
2446 | WARN_ON(test_bit(KEEPALIVE_PENDING, &con->flags)); | |
e00de341 SW |
2447 | mutex_unlock(&con->mutex); |
2448 | } | |
2449 | } | |
2450 | ||
31b8006e SW |
2451 | /* |
2452 | * Queue up an outgoing message on the given connection. | |
2453 | */ | |
2454 | void ceph_con_send(struct ceph_connection *con, struct ceph_msg *msg) | |
2455 | { | |
2456 | if (test_bit(CLOSED, &con->state)) { | |
2457 | dout("con_send %p closed, dropping %p\n", con, msg); | |
2458 | ceph_msg_put(msg); | |
2459 | return; | |
2460 | } | |
2461 | ||
2462 | /* set src+dst */ | |
dbad185d | 2463 | msg->hdr.src = con->msgr->inst.name; |
31b8006e | 2464 | |
3ca02ef9 SW |
2465 | BUG_ON(msg->front.iov_len != le32_to_cpu(msg->hdr.front_len)); |
2466 | ||
e84346b7 SW |
2467 | msg->needs_out_seq = true; |
2468 | ||
31b8006e | 2469 | /* queue */ |
ec302645 | 2470 | mutex_lock(&con->mutex); |
92ce034b | 2471 | |
38941f80 | 2472 | BUG_ON(msg->con != NULL); |
36eb71aa | 2473 | msg->con = con->ops->get(con); |
92ce034b AE |
2474 | BUG_ON(msg->con == NULL); |
2475 | ||
31b8006e SW |
2476 | BUG_ON(!list_empty(&msg->list_head)); |
2477 | list_add_tail(&msg->list_head, &con->out_queue); | |
2478 | dout("----- %p to %s%lld %d=%s len %d+%d+%d -----\n", msg, | |
2479 | ENTITY_NAME(con->peer_name), le16_to_cpu(msg->hdr.type), | |
2480 | ceph_msg_type_name(le16_to_cpu(msg->hdr.type)), | |
2481 | le32_to_cpu(msg->hdr.front_len), | |
2482 | le32_to_cpu(msg->hdr.middle_len), | |
2483 | le32_to_cpu(msg->hdr.data_len)); | |
ec302645 | 2484 | mutex_unlock(&con->mutex); |
31b8006e SW |
2485 | |
2486 | /* if there wasn't anything waiting to send before, queue | |
2487 | * new work */ | |
e00de341 | 2488 | clear_standby(con); |
928443cd | 2489 | if (test_and_set_bit(WRITE_PENDING, &con->flags) == 0) |
31b8006e SW |
2490 | queue_con(con); |
2491 | } | |
3d14c5d2 | 2492 | EXPORT_SYMBOL(ceph_con_send); |
31b8006e SW |
2493 | |
2494 | /* | |
2495 | * Revoke a message that was previously queued for send | |
2496 | */ | |
6740a845 | 2497 | void ceph_msg_revoke(struct ceph_msg *msg) |
31b8006e | 2498 | { |
6740a845 AE |
2499 | struct ceph_connection *con = msg->con; |
2500 | ||
2501 | if (!con) | |
2502 | return; /* Message not in our possession */ | |
2503 | ||
ec302645 | 2504 | mutex_lock(&con->mutex); |
31b8006e | 2505 | if (!list_empty(&msg->list_head)) { |
38941f80 | 2506 | dout("%s %p msg %p - was on queue\n", __func__, con, msg); |
31b8006e | 2507 | list_del_init(&msg->list_head); |
38941f80 | 2508 | BUG_ON(msg->con == NULL); |
36eb71aa | 2509 | msg->con->ops->put(msg->con); |
38941f80 | 2510 | msg->con = NULL; |
92ce034b | 2511 | msg->hdr.seq = 0; |
38941f80 | 2512 | |
31b8006e | 2513 | ceph_msg_put(msg); |
ed98adad SW |
2514 | } |
2515 | if (con->out_msg == msg) { | |
38941f80 | 2516 | dout("%s %p msg %p - was sending\n", __func__, con, msg); |
ed98adad | 2517 | con->out_msg = NULL; |
31b8006e SW |
2518 | if (con->out_kvec_is_msg) { |
2519 | con->out_skip = con->out_kvec_bytes; | |
2520 | con->out_kvec_is_msg = false; | |
2521 | } | |
ed98adad | 2522 | msg->hdr.seq = 0; |
92ce034b AE |
2523 | |
2524 | ceph_msg_put(msg); | |
31b8006e | 2525 | } |
ec302645 | 2526 | mutex_unlock(&con->mutex); |
31b8006e SW |
2527 | } |
2528 | ||
350b1c32 | 2529 | /* |
0d59ab81 | 2530 | * Revoke a message that we may be reading data into |
350b1c32 | 2531 | */ |
8921d114 | 2532 | void ceph_msg_revoke_incoming(struct ceph_msg *msg) |
350b1c32 | 2533 | { |
8921d114 AE |
2534 | struct ceph_connection *con; |
2535 | ||
2536 | BUG_ON(msg == NULL); | |
2537 | if (!msg->con) { | |
2538 | dout("%s msg %p null con\n", __func__, msg); | |
2539 | ||
2540 | return; /* Message not in our possession */ | |
2541 | } | |
2542 | ||
2543 | con = msg->con; | |
350b1c32 | 2544 | mutex_lock(&con->mutex); |
8921d114 | 2545 | if (con->in_msg == msg) { |
95c96174 ED |
2546 | unsigned int front_len = le32_to_cpu(con->in_hdr.front_len); |
2547 | unsigned int middle_len = le32_to_cpu(con->in_hdr.middle_len); | |
2548 | unsigned int data_len = le32_to_cpu(con->in_hdr.data_len); | |
350b1c32 SW |
2549 | |
2550 | /* skip rest of message */ | |
8921d114 AE |
2551 | dout("%s %p msg %p revoked\n", __func__, con, msg); |
2552 | con->in_base_pos = con->in_base_pos - | |
350b1c32 | 2553 | sizeof(struct ceph_msg_header) - |
0d59ab81 YS |
2554 | front_len - |
2555 | middle_len - | |
2556 | data_len - | |
350b1c32 | 2557 | sizeof(struct ceph_msg_footer); |
350b1c32 SW |
2558 | ceph_msg_put(con->in_msg); |
2559 | con->in_msg = NULL; | |
2560 | con->in_tag = CEPH_MSGR_TAG_READY; | |
684be25c | 2561 | con->in_seq++; |
350b1c32 | 2562 | } else { |
8921d114 AE |
2563 | dout("%s %p in_msg %p msg %p no-op\n", |
2564 | __func__, con, con->in_msg, msg); | |
350b1c32 SW |
2565 | } |
2566 | mutex_unlock(&con->mutex); | |
2567 | } | |
2568 | ||
31b8006e SW |
2569 | /* |
2570 | * Queue a keepalive byte to ensure the tcp connection is alive. | |
2571 | */ | |
2572 | void ceph_con_keepalive(struct ceph_connection *con) | |
2573 | { | |
e00de341 SW |
2574 | dout("con_keepalive %p\n", con); |
2575 | clear_standby(con); | |
928443cd AE |
2576 | if (test_and_set_bit(KEEPALIVE_PENDING, &con->flags) == 0 && |
2577 | test_and_set_bit(WRITE_PENDING, &con->flags) == 0) | |
31b8006e SW |
2578 | queue_con(con); |
2579 | } | |
3d14c5d2 | 2580 | EXPORT_SYMBOL(ceph_con_keepalive); |
31b8006e SW |
2581 | |
2582 | ||
2583 | /* | |
2584 | * construct a new message with given type, size | |
2585 | * the new msg has a ref count of 1. | |
2586 | */ | |
b61c2763 SW |
2587 | struct ceph_msg *ceph_msg_new(int type, int front_len, gfp_t flags, |
2588 | bool can_fail) | |
31b8006e SW |
2589 | { |
2590 | struct ceph_msg *m; | |
2591 | ||
34d23762 | 2592 | m = kmalloc(sizeof(*m), flags); |
31b8006e SW |
2593 | if (m == NULL) |
2594 | goto out; | |
c2e552e7 | 2595 | kref_init(&m->kref); |
38941f80 AE |
2596 | |
2597 | m->con = NULL; | |
31b8006e SW |
2598 | INIT_LIST_HEAD(&m->list_head); |
2599 | ||
45c6ceb5 | 2600 | m->hdr.tid = 0; |
31b8006e | 2601 | m->hdr.type = cpu_to_le16(type); |
45c6ceb5 SW |
2602 | m->hdr.priority = cpu_to_le16(CEPH_MSG_PRIO_DEFAULT); |
2603 | m->hdr.version = 0; | |
31b8006e SW |
2604 | m->hdr.front_len = cpu_to_le32(front_len); |
2605 | m->hdr.middle_len = 0; | |
bb257664 SW |
2606 | m->hdr.data_len = 0; |
2607 | m->hdr.data_off = 0; | |
45c6ceb5 | 2608 | m->hdr.reserved = 0; |
31b8006e SW |
2609 | m->footer.front_crc = 0; |
2610 | m->footer.middle_crc = 0; | |
2611 | m->footer.data_crc = 0; | |
45c6ceb5 | 2612 | m->footer.flags = 0; |
31b8006e SW |
2613 | m->front_max = front_len; |
2614 | m->front_is_vmalloc = false; | |
2615 | m->more_to_follow = false; | |
c0d5f9db | 2616 | m->ack_stamp = 0; |
31b8006e SW |
2617 | m->pool = NULL; |
2618 | ||
ca20892d HC |
2619 | /* middle */ |
2620 | m->middle = NULL; | |
2621 | ||
2622 | /* data */ | |
2623 | m->nr_pages = 0; | |
2624 | m->page_alignment = 0; | |
2625 | m->pages = NULL; | |
2626 | m->pagelist = NULL; | |
2627 | m->bio = NULL; | |
2628 | m->bio_iter = NULL; | |
2629 | m->bio_seg = 0; | |
2630 | m->trail = NULL; | |
2631 | ||
31b8006e SW |
2632 | /* front */ |
2633 | if (front_len) { | |
2634 | if (front_len > PAGE_CACHE_SIZE) { | |
34d23762 | 2635 | m->front.iov_base = __vmalloc(front_len, flags, |
31b8006e SW |
2636 | PAGE_KERNEL); |
2637 | m->front_is_vmalloc = true; | |
2638 | } else { | |
34d23762 | 2639 | m->front.iov_base = kmalloc(front_len, flags); |
31b8006e SW |
2640 | } |
2641 | if (m->front.iov_base == NULL) { | |
b61c2763 | 2642 | dout("ceph_msg_new can't allocate %d bytes\n", |
31b8006e SW |
2643 | front_len); |
2644 | goto out2; | |
2645 | } | |
2646 | } else { | |
2647 | m->front.iov_base = NULL; | |
2648 | } | |
2649 | m->front.iov_len = front_len; | |
2650 | ||
bb257664 | 2651 | dout("ceph_msg_new %p front %d\n", m, front_len); |
31b8006e SW |
2652 | return m; |
2653 | ||
2654 | out2: | |
2655 | ceph_msg_put(m); | |
2656 | out: | |
b61c2763 SW |
2657 | if (!can_fail) { |
2658 | pr_err("msg_new can't create type %d front %d\n", type, | |
2659 | front_len); | |
f0ed1b7c | 2660 | WARN_ON(1); |
b61c2763 SW |
2661 | } else { |
2662 | dout("msg_new can't create type %d front %d\n", type, | |
2663 | front_len); | |
2664 | } | |
a79832f2 | 2665 | return NULL; |
31b8006e | 2666 | } |
3d14c5d2 | 2667 | EXPORT_SYMBOL(ceph_msg_new); |
31b8006e | 2668 | |
31b8006e SW |
2669 | /* |
2670 | * Allocate "middle" portion of a message, if it is needed and wasn't | |
2671 | * allocated by alloc_msg. This allows us to read a small fixed-size | |
2672 | * per-type header in the front and then gracefully fail (i.e., | |
2673 | * propagate the error to the caller based on info in the front) when | |
2674 | * the middle is too large. | |
2675 | */ | |
2450418c | 2676 | static int ceph_alloc_middle(struct ceph_connection *con, struct ceph_msg *msg) |
31b8006e SW |
2677 | { |
2678 | int type = le16_to_cpu(msg->hdr.type); | |
2679 | int middle_len = le32_to_cpu(msg->hdr.middle_len); | |
2680 | ||
2681 | dout("alloc_middle %p type %d %s middle_len %d\n", msg, type, | |
2682 | ceph_msg_type_name(type), middle_len); | |
2683 | BUG_ON(!middle_len); | |
2684 | BUG_ON(msg->middle); | |
2685 | ||
b6c1d5b8 | 2686 | msg->middle = ceph_buffer_new(middle_len, GFP_NOFS); |
31b8006e SW |
2687 | if (!msg->middle) |
2688 | return -ENOMEM; | |
2689 | return 0; | |
2690 | } | |
2691 | ||
2450418c | 2692 | /* |
1c20f2d2 AE |
2693 | * Allocate a message for receiving an incoming message on a |
2694 | * connection, and save the result in con->in_msg. Uses the | |
2695 | * connection's private alloc_msg op if available. | |
2696 | * | |
2697 | * Returns true if the message should be skipped, false otherwise. | |
2698 | * If true is returned (skip message), con->in_msg will be NULL. | |
2699 | * If false is returned, con->in_msg will contain a pointer to the | |
2700 | * newly-allocated message, or NULL in case of memory exhaustion. | |
2450418c | 2701 | */ |
1c20f2d2 AE |
2702 | static bool ceph_con_in_msg_alloc(struct ceph_connection *con, |
2703 | struct ceph_msg_header *hdr) | |
2450418c YS |
2704 | { |
2705 | int type = le16_to_cpu(hdr->type); | |
2706 | int front_len = le32_to_cpu(hdr->front_len); | |
2707 | int middle_len = le32_to_cpu(hdr->middle_len); | |
2450418c YS |
2708 | int ret; |
2709 | ||
1c20f2d2 AE |
2710 | BUG_ON(con->in_msg != NULL); |
2711 | ||
2450418c | 2712 | if (con->ops->alloc_msg) { |
1c20f2d2 AE |
2713 | int skip = 0; |
2714 | ||
0547a9b3 | 2715 | mutex_unlock(&con->mutex); |
1c20f2d2 | 2716 | con->in_msg = con->ops->alloc_msg(con, hdr, &skip); |
0547a9b3 | 2717 | mutex_lock(&con->mutex); |
92ce034b | 2718 | if (con->in_msg) { |
36eb71aa | 2719 | con->in_msg->con = con->ops->get(con); |
92ce034b AE |
2720 | BUG_ON(con->in_msg->con == NULL); |
2721 | } | |
1c20f2d2 AE |
2722 | if (skip) |
2723 | con->in_msg = NULL; | |
2724 | ||
2725 | if (!con->in_msg) | |
2726 | return skip != 0; | |
2450418c | 2727 | } |
1c20f2d2 AE |
2728 | if (!con->in_msg) { |
2729 | con->in_msg = ceph_msg_new(type, front_len, GFP_NOFS, false); | |
2730 | if (!con->in_msg) { | |
2450418c YS |
2731 | pr_err("unable to allocate msg type %d len %d\n", |
2732 | type, front_len); | |
1c20f2d2 | 2733 | return false; |
2450418c | 2734 | } |
36eb71aa | 2735 | con->in_msg->con = con->ops->get(con); |
92ce034b | 2736 | BUG_ON(con->in_msg->con == NULL); |
1c20f2d2 | 2737 | con->in_msg->page_alignment = le16_to_cpu(hdr->data_off); |
2450418c | 2738 | } |
1c20f2d2 | 2739 | memcpy(&con->in_msg->hdr, &con->in_hdr, sizeof(con->in_hdr)); |
2450418c | 2740 | |
1c20f2d2 AE |
2741 | if (middle_len && !con->in_msg->middle) { |
2742 | ret = ceph_alloc_middle(con, con->in_msg); | |
2450418c | 2743 | if (ret < 0) { |
1c20f2d2 AE |
2744 | ceph_msg_put(con->in_msg); |
2745 | con->in_msg = NULL; | |
2450418c YS |
2746 | } |
2747 | } | |
9d7f0f13 | 2748 | |
1c20f2d2 | 2749 | return false; |
2450418c YS |
2750 | } |
2751 | ||
31b8006e SW |
2752 | |
2753 | /* | |
2754 | * Free a generically kmalloc'd message. | |
2755 | */ | |
2756 | void ceph_msg_kfree(struct ceph_msg *m) | |
2757 | { | |
2758 | dout("msg_kfree %p\n", m); | |
2759 | if (m->front_is_vmalloc) | |
2760 | vfree(m->front.iov_base); | |
2761 | else | |
2762 | kfree(m->front.iov_base); | |
2763 | kfree(m); | |
2764 | } | |
2765 | ||
2766 | /* | |
2767 | * Drop a msg ref. Destroy as needed. | |
2768 | */ | |
c2e552e7 SW |
2769 | void ceph_msg_last_put(struct kref *kref) |
2770 | { | |
2771 | struct ceph_msg *m = container_of(kref, struct ceph_msg, kref); | |
31b8006e | 2772 | |
c2e552e7 SW |
2773 | dout("ceph_msg_put last one on %p\n", m); |
2774 | WARN_ON(!list_empty(&m->list_head)); | |
2775 | ||
2776 | /* drop middle, data, if any */ | |
2777 | if (m->middle) { | |
2778 | ceph_buffer_put(m->middle); | |
2779 | m->middle = NULL; | |
31b8006e | 2780 | } |
c2e552e7 SW |
2781 | m->nr_pages = 0; |
2782 | m->pages = NULL; | |
2783 | ||
58bb3b37 SW |
2784 | if (m->pagelist) { |
2785 | ceph_pagelist_release(m->pagelist); | |
2786 | kfree(m->pagelist); | |
2787 | m->pagelist = NULL; | |
2788 | } | |
2789 | ||
68b4476b YS |
2790 | m->trail = NULL; |
2791 | ||
c2e552e7 SW |
2792 | if (m->pool) |
2793 | ceph_msgpool_put(m->pool, m); | |
2794 | else | |
2795 | ceph_msg_kfree(m); | |
31b8006e | 2796 | } |
3d14c5d2 | 2797 | EXPORT_SYMBOL(ceph_msg_last_put); |
9ec7cab1 SW |
2798 | |
2799 | void ceph_msg_dump(struct ceph_msg *msg) | |
2800 | { | |
2801 | pr_debug("msg_dump %p (front_max %d nr_pages %d)\n", msg, | |
2802 | msg->front_max, msg->nr_pages); | |
2803 | print_hex_dump(KERN_DEBUG, "header: ", | |
2804 | DUMP_PREFIX_OFFSET, 16, 1, | |
2805 | &msg->hdr, sizeof(msg->hdr), true); | |
2806 | print_hex_dump(KERN_DEBUG, " front: ", | |
2807 | DUMP_PREFIX_OFFSET, 16, 1, | |
2808 | msg->front.iov_base, msg->front.iov_len, true); | |
2809 | if (msg->middle) | |
2810 | print_hex_dump(KERN_DEBUG, "middle: ", | |
2811 | DUMP_PREFIX_OFFSET, 16, 1, | |
2812 | msg->middle->vec.iov_base, | |
2813 | msg->middle->vec.iov_len, true); | |
2814 | print_hex_dump(KERN_DEBUG, "footer: ", | |
2815 | DUMP_PREFIX_OFFSET, 16, 1, | |
2816 | &msg->footer, sizeof(msg->footer), true); | |
2817 | } | |
3d14c5d2 | 2818 | EXPORT_SYMBOL(ceph_msg_dump); |