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> | |
3ebc21f7 | 12 | #ifdef CONFIG_BLOCK |
68b4476b | 13 | #include <linux/bio.h> |
3ebc21f7 | 14 | #endif /* CONFIG_BLOCK */ |
ee3b56f2 | 15 | #include <linux/dns_resolver.h> |
31b8006e SW |
16 | #include <net/tcp.h> |
17 | ||
2b3e0c90 | 18 | #include <linux/ceph/ceph_features.h> |
3d14c5d2 YS |
19 | #include <linux/ceph/libceph.h> |
20 | #include <linux/ceph/messenger.h> | |
21 | #include <linux/ceph/decode.h> | |
22 | #include <linux/ceph/pagelist.h> | |
bc3b2d7f | 23 | #include <linux/export.h> |
31b8006e | 24 | |
fe38a2b6 AE |
25 | #define list_entry_next(pos, member) \ |
26 | list_entry(pos->member.next, typeof(*pos), member) | |
27 | ||
31b8006e SW |
28 | /* |
29 | * Ceph uses the messenger to exchange ceph_msg messages with other | |
30 | * hosts in the system. The messenger provides ordered and reliable | |
31 | * delivery. We tolerate TCP disconnects by reconnecting (with | |
32 | * exponential backoff) in the case of a fault (disconnection, bad | |
33 | * crc, protocol error). Acks allow sent messages to be discarded by | |
34 | * the sender. | |
35 | */ | |
36 | ||
bc18f4b1 AE |
37 | /* |
38 | * We track the state of the socket on a given connection using | |
39 | * values defined below. The transition to a new socket state is | |
40 | * handled by a function which verifies we aren't coming from an | |
41 | * unexpected state. | |
42 | * | |
43 | * -------- | |
44 | * | NEW* | transient initial state | |
45 | * -------- | |
46 | * | con_sock_state_init() | |
47 | * v | |
48 | * ---------- | |
49 | * | CLOSED | initialized, but no socket (and no | |
50 | * ---------- TCP connection) | |
51 | * ^ \ | |
52 | * | \ con_sock_state_connecting() | |
53 | * | ---------------------- | |
54 | * | \ | |
55 | * + con_sock_state_closed() \ | |
fbb85a47 SW |
56 | * |+--------------------------- \ |
57 | * | \ \ \ | |
58 | * | ----------- \ \ | |
59 | * | | CLOSING | socket event; \ \ | |
60 | * | ----------- await close \ \ | |
61 | * | ^ \ | | |
62 | * | | \ | | |
63 | * | + con_sock_state_closing() \ | | |
64 | * | / \ | | | |
65 | * | / --------------- | | | |
66 | * | / \ v v | |
bc18f4b1 AE |
67 | * | / -------------- |
68 | * | / -----------------| CONNECTING | socket created, TCP | |
69 | * | | / -------------- connect initiated | |
70 | * | | | con_sock_state_connected() | |
71 | * | | v | |
72 | * ------------- | |
73 | * | CONNECTED | TCP connection established | |
74 | * ------------- | |
75 | * | |
76 | * State values for ceph_connection->sock_state; NEW is assumed to be 0. | |
77 | */ | |
ce2c8903 AE |
78 | |
79 | #define CON_SOCK_STATE_NEW 0 /* -> CLOSED */ | |
80 | #define CON_SOCK_STATE_CLOSED 1 /* -> CONNECTING */ | |
81 | #define CON_SOCK_STATE_CONNECTING 2 /* -> CONNECTED or -> CLOSING */ | |
82 | #define CON_SOCK_STATE_CONNECTED 3 /* -> CLOSING or -> CLOSED */ | |
83 | #define CON_SOCK_STATE_CLOSING 4 /* -> CLOSED */ | |
84 | ||
8dacc7da SW |
85 | /* |
86 | * connection states | |
87 | */ | |
88 | #define CON_STATE_CLOSED 1 /* -> PREOPEN */ | |
89 | #define CON_STATE_PREOPEN 2 /* -> CONNECTING, CLOSED */ | |
90 | #define CON_STATE_CONNECTING 3 /* -> NEGOTIATING, CLOSED */ | |
91 | #define CON_STATE_NEGOTIATING 4 /* -> OPEN, CLOSED */ | |
92 | #define CON_STATE_OPEN 5 /* -> STANDBY, CLOSED */ | |
93 | #define CON_STATE_STANDBY 6 /* -> PREOPEN, CLOSED */ | |
94 | ||
4a861692 SW |
95 | /* |
96 | * ceph_connection flag bits | |
97 | */ | |
98 | #define CON_FLAG_LOSSYTX 0 /* we can close channel or drop | |
99 | * messages on errors */ | |
100 | #define CON_FLAG_KEEPALIVE_PENDING 1 /* we need to send a keepalive */ | |
101 | #define CON_FLAG_WRITE_PENDING 2 /* we have data ready to send */ | |
102 | #define CON_FLAG_SOCK_CLOSED 3 /* socket state changed to closed */ | |
103 | #define CON_FLAG_BACKOFF 4 /* need to retry queuing delayed work */ | |
8dacc7da | 104 | |
c9ffc77a AE |
105 | static bool con_flag_valid(unsigned long con_flag) |
106 | { | |
107 | switch (con_flag) { | |
108 | case CON_FLAG_LOSSYTX: | |
109 | case CON_FLAG_KEEPALIVE_PENDING: | |
110 | case CON_FLAG_WRITE_PENDING: | |
111 | case CON_FLAG_SOCK_CLOSED: | |
112 | case CON_FLAG_BACKOFF: | |
113 | return true; | |
114 | default: | |
115 | return false; | |
116 | } | |
117 | } | |
118 | ||
119 | static void con_flag_clear(struct ceph_connection *con, unsigned long con_flag) | |
120 | { | |
121 | BUG_ON(!con_flag_valid(con_flag)); | |
122 | ||
123 | clear_bit(con_flag, &con->flags); | |
124 | } | |
125 | ||
126 | static void con_flag_set(struct ceph_connection *con, unsigned long con_flag) | |
127 | { | |
128 | BUG_ON(!con_flag_valid(con_flag)); | |
129 | ||
130 | set_bit(con_flag, &con->flags); | |
131 | } | |
132 | ||
133 | static bool con_flag_test(struct ceph_connection *con, unsigned long con_flag) | |
134 | { | |
135 | BUG_ON(!con_flag_valid(con_flag)); | |
136 | ||
137 | return test_bit(con_flag, &con->flags); | |
138 | } | |
139 | ||
140 | static bool con_flag_test_and_clear(struct ceph_connection *con, | |
141 | unsigned long con_flag) | |
142 | { | |
143 | BUG_ON(!con_flag_valid(con_flag)); | |
144 | ||
145 | return test_and_clear_bit(con_flag, &con->flags); | |
146 | } | |
147 | ||
148 | static bool con_flag_test_and_set(struct ceph_connection *con, | |
149 | unsigned long con_flag) | |
150 | { | |
151 | BUG_ON(!con_flag_valid(con_flag)); | |
152 | ||
153 | return test_and_set_bit(con_flag, &con->flags); | |
154 | } | |
155 | ||
e3d5d638 AE |
156 | /* Slab caches for frequently-allocated structures */ |
157 | ||
158 | static struct kmem_cache *ceph_msg_cache; | |
81b36be4 | 159 | static struct kmem_cache *ceph_msg_data_cache; |
e3d5d638 | 160 | |
31b8006e SW |
161 | /* static tag bytes (protocol control messages) */ |
162 | static char tag_msg = CEPH_MSGR_TAG_MSG; | |
163 | static char tag_ack = CEPH_MSGR_TAG_ACK; | |
164 | static char tag_keepalive = CEPH_MSGR_TAG_KEEPALIVE; | |
165 | ||
a6a5349d SW |
166 | #ifdef CONFIG_LOCKDEP |
167 | static struct lock_class_key socket_class; | |
168 | #endif | |
169 | ||
84495f49 AE |
170 | /* |
171 | * When skipping (ignoring) a block of input we read it into a "skip | |
172 | * buffer," which is this many bytes in size. | |
173 | */ | |
174 | #define SKIP_BUF_SIZE 1024 | |
31b8006e SW |
175 | |
176 | static void queue_con(struct ceph_connection *con); | |
177 | static void con_work(struct work_struct *); | |
93209264 | 178 | static void con_fault(struct ceph_connection *con); |
31b8006e | 179 | |
31b8006e | 180 | /* |
f64a9317 AE |
181 | * Nicely render a sockaddr as a string. An array of formatted |
182 | * strings is used, to approximate reentrancy. | |
31b8006e | 183 | */ |
f64a9317 AE |
184 | #define ADDR_STR_COUNT_LOG 5 /* log2(# address strings in array) */ |
185 | #define ADDR_STR_COUNT (1 << ADDR_STR_COUNT_LOG) | |
186 | #define ADDR_STR_COUNT_MASK (ADDR_STR_COUNT - 1) | |
187 | #define MAX_ADDR_STR_LEN 64 /* 54 is enough */ | |
188 | ||
189 | static char addr_str[ADDR_STR_COUNT][MAX_ADDR_STR_LEN]; | |
190 | static atomic_t addr_str_seq = ATOMIC_INIT(0); | |
31b8006e | 191 | |
57666519 | 192 | static struct page *zero_page; /* used in certain error cases */ |
57666519 | 193 | |
3d14c5d2 | 194 | const char *ceph_pr_addr(const struct sockaddr_storage *ss) |
31b8006e SW |
195 | { |
196 | int i; | |
197 | char *s; | |
99f0f3b2 AE |
198 | struct sockaddr_in *in4 = (struct sockaddr_in *) ss; |
199 | struct sockaddr_in6 *in6 = (struct sockaddr_in6 *) ss; | |
31b8006e | 200 | |
f64a9317 | 201 | i = atomic_inc_return(&addr_str_seq) & ADDR_STR_COUNT_MASK; |
31b8006e SW |
202 | s = addr_str[i]; |
203 | ||
204 | switch (ss->ss_family) { | |
205 | case AF_INET: | |
bd406145 AE |
206 | snprintf(s, MAX_ADDR_STR_LEN, "%pI4:%hu", &in4->sin_addr, |
207 | ntohs(in4->sin_port)); | |
31b8006e SW |
208 | break; |
209 | ||
210 | case AF_INET6: | |
bd406145 AE |
211 | snprintf(s, MAX_ADDR_STR_LEN, "[%pI6c]:%hu", &in6->sin6_addr, |
212 | ntohs(in6->sin6_port)); | |
31b8006e SW |
213 | break; |
214 | ||
215 | default: | |
d3002b97 AE |
216 | snprintf(s, MAX_ADDR_STR_LEN, "(unknown sockaddr family %hu)", |
217 | ss->ss_family); | |
31b8006e SW |
218 | } |
219 | ||
220 | return s; | |
221 | } | |
3d14c5d2 | 222 | EXPORT_SYMBOL(ceph_pr_addr); |
31b8006e | 223 | |
63f2d211 SW |
224 | static void encode_my_addr(struct ceph_messenger *msgr) |
225 | { | |
226 | memcpy(&msgr->my_enc_addr, &msgr->inst.addr, sizeof(msgr->my_enc_addr)); | |
227 | ceph_encode_addr(&msgr->my_enc_addr); | |
228 | } | |
229 | ||
31b8006e SW |
230 | /* |
231 | * work queue for all reading and writing to/from the socket. | |
232 | */ | |
e0f43c94 | 233 | static struct workqueue_struct *ceph_msgr_wq; |
31b8006e | 234 | |
e3d5d638 AE |
235 | static int ceph_msgr_slab_init(void) |
236 | { | |
237 | BUG_ON(ceph_msg_cache); | |
238 | ceph_msg_cache = kmem_cache_create("ceph_msg", | |
239 | sizeof (struct ceph_msg), | |
240 | __alignof__(struct ceph_msg), 0, NULL); | |
81b36be4 AE |
241 | |
242 | if (!ceph_msg_cache) | |
243 | return -ENOMEM; | |
244 | ||
245 | BUG_ON(ceph_msg_data_cache); | |
246 | ceph_msg_data_cache = kmem_cache_create("ceph_msg_data", | |
247 | sizeof (struct ceph_msg_data), | |
248 | __alignof__(struct ceph_msg_data), | |
249 | 0, NULL); | |
250 | if (ceph_msg_data_cache) | |
251 | return 0; | |
252 | ||
253 | kmem_cache_destroy(ceph_msg_cache); | |
254 | ceph_msg_cache = NULL; | |
255 | ||
256 | return -ENOMEM; | |
e3d5d638 AE |
257 | } |
258 | ||
259 | static void ceph_msgr_slab_exit(void) | |
260 | { | |
81b36be4 AE |
261 | BUG_ON(!ceph_msg_data_cache); |
262 | kmem_cache_destroy(ceph_msg_data_cache); | |
263 | ceph_msg_data_cache = NULL; | |
264 | ||
e3d5d638 AE |
265 | BUG_ON(!ceph_msg_cache); |
266 | kmem_cache_destroy(ceph_msg_cache); | |
267 | ceph_msg_cache = NULL; | |
268 | } | |
269 | ||
15417167 | 270 | static void _ceph_msgr_exit(void) |
6173d1f0 | 271 | { |
d3002b97 | 272 | if (ceph_msgr_wq) { |
6173d1f0 | 273 | destroy_workqueue(ceph_msgr_wq); |
d3002b97 AE |
274 | ceph_msgr_wq = NULL; |
275 | } | |
6173d1f0 | 276 | |
e3d5d638 AE |
277 | ceph_msgr_slab_exit(); |
278 | ||
6173d1f0 AE |
279 | BUG_ON(zero_page == NULL); |
280 | kunmap(zero_page); | |
281 | page_cache_release(zero_page); | |
282 | zero_page = NULL; | |
283 | } | |
284 | ||
3d14c5d2 | 285 | int ceph_msgr_init(void) |
31b8006e | 286 | { |
57666519 AE |
287 | BUG_ON(zero_page != NULL); |
288 | zero_page = ZERO_PAGE(0); | |
289 | page_cache_get(zero_page); | |
290 | ||
e3d5d638 AE |
291 | if (ceph_msgr_slab_init()) |
292 | return -ENOMEM; | |
293 | ||
4d1829a5 | 294 | ceph_msgr_wq = alloc_workqueue("ceph-msgr", 0, 0); |
6173d1f0 AE |
295 | if (ceph_msgr_wq) |
296 | return 0; | |
57666519 | 297 | |
6173d1f0 AE |
298 | pr_err("msgr_init failed to create workqueue\n"); |
299 | _ceph_msgr_exit(); | |
57666519 | 300 | |
6173d1f0 | 301 | return -ENOMEM; |
31b8006e | 302 | } |
3d14c5d2 | 303 | EXPORT_SYMBOL(ceph_msgr_init); |
31b8006e SW |
304 | |
305 | void ceph_msgr_exit(void) | |
306 | { | |
57666519 | 307 | BUG_ON(ceph_msgr_wq == NULL); |
57666519 | 308 | |
6173d1f0 | 309 | _ceph_msgr_exit(); |
31b8006e | 310 | } |
3d14c5d2 | 311 | EXPORT_SYMBOL(ceph_msgr_exit); |
31b8006e | 312 | |
cd84db6e | 313 | void ceph_msgr_flush(void) |
a922d38f SW |
314 | { |
315 | flush_workqueue(ceph_msgr_wq); | |
316 | } | |
3d14c5d2 | 317 | EXPORT_SYMBOL(ceph_msgr_flush); |
a922d38f | 318 | |
ce2c8903 AE |
319 | /* Connection socket state transition functions */ |
320 | ||
321 | static void con_sock_state_init(struct ceph_connection *con) | |
322 | { | |
323 | int old_state; | |
324 | ||
325 | old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CLOSED); | |
326 | if (WARN_ON(old_state != CON_SOCK_STATE_NEW)) | |
327 | printk("%s: unexpected old state %d\n", __func__, old_state); | |
8007b8d6 SW |
328 | dout("%s con %p sock %d -> %d\n", __func__, con, old_state, |
329 | CON_SOCK_STATE_CLOSED); | |
ce2c8903 AE |
330 | } |
331 | ||
332 | static void con_sock_state_connecting(struct ceph_connection *con) | |
333 | { | |
334 | int old_state; | |
335 | ||
336 | old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CONNECTING); | |
337 | if (WARN_ON(old_state != CON_SOCK_STATE_CLOSED)) | |
338 | printk("%s: unexpected old state %d\n", __func__, old_state); | |
8007b8d6 SW |
339 | dout("%s con %p sock %d -> %d\n", __func__, con, old_state, |
340 | CON_SOCK_STATE_CONNECTING); | |
ce2c8903 AE |
341 | } |
342 | ||
343 | static void con_sock_state_connected(struct ceph_connection *con) | |
344 | { | |
345 | int old_state; | |
346 | ||
347 | old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CONNECTED); | |
348 | if (WARN_ON(old_state != CON_SOCK_STATE_CONNECTING)) | |
349 | printk("%s: unexpected old state %d\n", __func__, old_state); | |
8007b8d6 SW |
350 | dout("%s con %p sock %d -> %d\n", __func__, con, old_state, |
351 | CON_SOCK_STATE_CONNECTED); | |
ce2c8903 AE |
352 | } |
353 | ||
354 | static void con_sock_state_closing(struct ceph_connection *con) | |
355 | { | |
356 | int old_state; | |
357 | ||
358 | old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CLOSING); | |
359 | if (WARN_ON(old_state != CON_SOCK_STATE_CONNECTING && | |
360 | old_state != CON_SOCK_STATE_CONNECTED && | |
361 | old_state != CON_SOCK_STATE_CLOSING)) | |
362 | printk("%s: unexpected old state %d\n", __func__, old_state); | |
8007b8d6 SW |
363 | dout("%s con %p sock %d -> %d\n", __func__, con, old_state, |
364 | CON_SOCK_STATE_CLOSING); | |
ce2c8903 AE |
365 | } |
366 | ||
367 | static void con_sock_state_closed(struct ceph_connection *con) | |
368 | { | |
369 | int old_state; | |
370 | ||
371 | old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CLOSED); | |
372 | if (WARN_ON(old_state != CON_SOCK_STATE_CONNECTED && | |
fbb85a47 | 373 | old_state != CON_SOCK_STATE_CLOSING && |
8007b8d6 SW |
374 | old_state != CON_SOCK_STATE_CONNECTING && |
375 | old_state != CON_SOCK_STATE_CLOSED)) | |
ce2c8903 | 376 | printk("%s: unexpected old state %d\n", __func__, old_state); |
8007b8d6 SW |
377 | dout("%s con %p sock %d -> %d\n", __func__, con, old_state, |
378 | CON_SOCK_STATE_CLOSED); | |
ce2c8903 | 379 | } |
a922d38f | 380 | |
31b8006e SW |
381 | /* |
382 | * socket callback functions | |
383 | */ | |
384 | ||
385 | /* data available on socket, or listen socket received a connect */ | |
676d2369 | 386 | static void ceph_sock_data_ready(struct sock *sk) |
31b8006e | 387 | { |
bd406145 | 388 | struct ceph_connection *con = sk->sk_user_data; |
a2a32584 GH |
389 | if (atomic_read(&con->msgr->stopping)) { |
390 | return; | |
391 | } | |
bd406145 | 392 | |
31b8006e | 393 | if (sk->sk_state != TCP_CLOSE_WAIT) { |
327800bd | 394 | dout("%s on %p state = %lu, queueing work\n", __func__, |
31b8006e SW |
395 | con, con->state); |
396 | queue_con(con); | |
397 | } | |
398 | } | |
399 | ||
400 | /* socket has buffer space for writing */ | |
327800bd | 401 | static void ceph_sock_write_space(struct sock *sk) |
31b8006e | 402 | { |
d3002b97 | 403 | struct ceph_connection *con = sk->sk_user_data; |
31b8006e | 404 | |
182fac26 JS |
405 | /* only queue to workqueue if there is data we want to write, |
406 | * and there is sufficient space in the socket buffer to accept | |
327800bd | 407 | * more data. clear SOCK_NOSPACE so that ceph_sock_write_space() |
182fac26 JS |
408 | * doesn't get called again until try_write() fills the socket |
409 | * buffer. See net/ipv4/tcp_input.c:tcp_check_space() | |
410 | * and net/core/stream.c:sk_stream_write_space(). | |
411 | */ | |
c9ffc77a | 412 | if (con_flag_test(con, CON_FLAG_WRITE_PENDING)) { |
64dc6130 | 413 | if (sk_stream_is_writeable(sk)) { |
327800bd | 414 | dout("%s %p queueing write work\n", __func__, con); |
182fac26 JS |
415 | clear_bit(SOCK_NOSPACE, &sk->sk_socket->flags); |
416 | queue_con(con); | |
417 | } | |
31b8006e | 418 | } else { |
327800bd | 419 | dout("%s %p nothing to write\n", __func__, con); |
31b8006e | 420 | } |
31b8006e SW |
421 | } |
422 | ||
423 | /* socket's state has changed */ | |
327800bd | 424 | static void ceph_sock_state_change(struct sock *sk) |
31b8006e | 425 | { |
bd406145 | 426 | struct ceph_connection *con = sk->sk_user_data; |
31b8006e | 427 | |
327800bd | 428 | dout("%s %p state = %lu sk_state = %u\n", __func__, |
31b8006e SW |
429 | con, con->state, sk->sk_state); |
430 | ||
31b8006e SW |
431 | switch (sk->sk_state) { |
432 | case TCP_CLOSE: | |
327800bd | 433 | dout("%s TCP_CLOSE\n", __func__); |
31b8006e | 434 | case TCP_CLOSE_WAIT: |
327800bd | 435 | dout("%s TCP_CLOSE_WAIT\n", __func__); |
ce2c8903 | 436 | con_sock_state_closing(con); |
c9ffc77a | 437 | con_flag_set(con, CON_FLAG_SOCK_CLOSED); |
d65c9e0b | 438 | queue_con(con); |
31b8006e SW |
439 | break; |
440 | case TCP_ESTABLISHED: | |
327800bd | 441 | dout("%s TCP_ESTABLISHED\n", __func__); |
ce2c8903 | 442 | con_sock_state_connected(con); |
31b8006e SW |
443 | queue_con(con); |
444 | break; | |
d3002b97 AE |
445 | default: /* Everything else is uninteresting */ |
446 | break; | |
31b8006e SW |
447 | } |
448 | } | |
449 | ||
450 | /* | |
451 | * set up socket callbacks | |
452 | */ | |
453 | static void set_sock_callbacks(struct socket *sock, | |
454 | struct ceph_connection *con) | |
455 | { | |
456 | struct sock *sk = sock->sk; | |
bd406145 | 457 | sk->sk_user_data = con; |
327800bd AE |
458 | sk->sk_data_ready = ceph_sock_data_ready; |
459 | sk->sk_write_space = ceph_sock_write_space; | |
460 | sk->sk_state_change = ceph_sock_state_change; | |
31b8006e SW |
461 | } |
462 | ||
463 | ||
464 | /* | |
465 | * socket helpers | |
466 | */ | |
467 | ||
468 | /* | |
469 | * initiate connection to a remote socket. | |
470 | */ | |
41617d0c | 471 | static int ceph_tcp_connect(struct ceph_connection *con) |
31b8006e | 472 | { |
f91d3471 | 473 | struct sockaddr_storage *paddr = &con->peer_addr.in_addr; |
31b8006e SW |
474 | struct socket *sock; |
475 | int ret; | |
476 | ||
477 | BUG_ON(con->sock); | |
f91d3471 SW |
478 | ret = sock_create_kern(con->peer_addr.in_addr.ss_family, SOCK_STREAM, |
479 | IPPROTO_TCP, &sock); | |
31b8006e | 480 | if (ret) |
41617d0c | 481 | return ret; |
31b8006e SW |
482 | sock->sk->sk_allocation = GFP_NOFS; |
483 | ||
a6a5349d SW |
484 | #ifdef CONFIG_LOCKDEP |
485 | lockdep_set_class(&sock->sk->sk_lock, &socket_class); | |
486 | #endif | |
487 | ||
31b8006e SW |
488 | set_sock_callbacks(sock, con); |
489 | ||
3d14c5d2 | 490 | dout("connect %s\n", ceph_pr_addr(&con->peer_addr.in_addr)); |
31b8006e | 491 | |
89a86be0 | 492 | con_sock_state_connecting(con); |
f91d3471 SW |
493 | ret = sock->ops->connect(sock, (struct sockaddr *)paddr, sizeof(*paddr), |
494 | O_NONBLOCK); | |
31b8006e SW |
495 | if (ret == -EINPROGRESS) { |
496 | dout("connect %s EINPROGRESS sk_state = %u\n", | |
3d14c5d2 | 497 | ceph_pr_addr(&con->peer_addr.in_addr), |
31b8006e | 498 | sock->sk->sk_state); |
a5bc3129 | 499 | } else if (ret < 0) { |
31b8006e | 500 | pr_err("connect %s error %d\n", |
3d14c5d2 | 501 | ceph_pr_addr(&con->peer_addr.in_addr), ret); |
31b8006e | 502 | sock_release(sock); |
31b8006e | 503 | con->error_msg = "connect error"; |
31b8006e | 504 | |
41617d0c | 505 | return ret; |
a5bc3129 AE |
506 | } |
507 | con->sock = sock; | |
41617d0c | 508 | return 0; |
31b8006e SW |
509 | } |
510 | ||
511 | static int ceph_tcp_recvmsg(struct socket *sock, void *buf, size_t len) | |
512 | { | |
513 | struct kvec iov = {buf, len}; | |
514 | struct msghdr msg = { .msg_flags = MSG_DONTWAIT | MSG_NOSIGNAL }; | |
98bdb0aa | 515 | int r; |
31b8006e | 516 | |
98bdb0aa SW |
517 | r = kernel_recvmsg(sock, &msg, &iov, 1, len, msg.msg_flags); |
518 | if (r == -EAGAIN) | |
519 | r = 0; | |
520 | return r; | |
31b8006e SW |
521 | } |
522 | ||
afb3d90e AE |
523 | static int ceph_tcp_recvpage(struct socket *sock, struct page *page, |
524 | int page_offset, size_t length) | |
525 | { | |
526 | void *kaddr; | |
527 | int ret; | |
528 | ||
529 | BUG_ON(page_offset + length > PAGE_SIZE); | |
530 | ||
531 | kaddr = kmap(page); | |
532 | BUG_ON(!kaddr); | |
533 | ret = ceph_tcp_recvmsg(sock, kaddr + page_offset, length); | |
534 | kunmap(page); | |
535 | ||
536 | return ret; | |
537 | } | |
538 | ||
31b8006e SW |
539 | /* |
540 | * write something. @more is true if caller will be sending more data | |
541 | * shortly. | |
542 | */ | |
543 | static int ceph_tcp_sendmsg(struct socket *sock, struct kvec *iov, | |
544 | size_t kvlen, size_t len, int more) | |
545 | { | |
546 | struct msghdr msg = { .msg_flags = MSG_DONTWAIT | MSG_NOSIGNAL }; | |
42961d23 | 547 | int r; |
31b8006e SW |
548 | |
549 | if (more) | |
550 | msg.msg_flags |= MSG_MORE; | |
551 | else | |
552 | msg.msg_flags |= MSG_EOR; /* superfluous, but what the hell */ | |
553 | ||
42961d23 SW |
554 | r = kernel_sendmsg(sock, &msg, iov, kvlen, len); |
555 | if (r == -EAGAIN) | |
556 | r = 0; | |
557 | return r; | |
31b8006e SW |
558 | } |
559 | ||
31739139 | 560 | static int ceph_tcp_sendpage(struct socket *sock, struct page *page, |
e1dcb128 | 561 | int offset, size_t size, bool more) |
31739139 AE |
562 | { |
563 | int flags = MSG_DONTWAIT | MSG_NOSIGNAL | (more ? MSG_MORE : MSG_EOR); | |
564 | int ret; | |
565 | ||
566 | ret = kernel_sendpage(sock, page, offset, size, flags); | |
567 | if (ret == -EAGAIN) | |
568 | ret = 0; | |
569 | ||
570 | return ret; | |
571 | } | |
572 | ||
31b8006e SW |
573 | |
574 | /* | |
575 | * Shutdown/close the socket for the given connection. | |
576 | */ | |
577 | static int con_close_socket(struct ceph_connection *con) | |
578 | { | |
8007b8d6 | 579 | int rc = 0; |
31b8006e SW |
580 | |
581 | dout("con_close_socket on %p sock %p\n", con, con->sock); | |
8007b8d6 SW |
582 | if (con->sock) { |
583 | rc = con->sock->ops->shutdown(con->sock, SHUT_RDWR); | |
584 | sock_release(con->sock); | |
585 | con->sock = NULL; | |
586 | } | |
456ea468 AE |
587 | |
588 | /* | |
4a861692 | 589 | * Forcibly clear the SOCK_CLOSED flag. It gets set |
456ea468 AE |
590 | * independent of the connection mutex, and we could have |
591 | * received a socket close event before we had the chance to | |
592 | * shut the socket down. | |
593 | */ | |
c9ffc77a | 594 | con_flag_clear(con, CON_FLAG_SOCK_CLOSED); |
8007b8d6 | 595 | |
ce2c8903 | 596 | con_sock_state_closed(con); |
31b8006e SW |
597 | return rc; |
598 | } | |
599 | ||
600 | /* | |
601 | * Reset a connection. Discard all incoming and outgoing messages | |
602 | * and clear *_seq state. | |
603 | */ | |
604 | static void ceph_msg_remove(struct ceph_msg *msg) | |
605 | { | |
606 | list_del_init(&msg->list_head); | |
38941f80 | 607 | BUG_ON(msg->con == NULL); |
36eb71aa | 608 | msg->con->ops->put(msg->con); |
38941f80 AE |
609 | msg->con = NULL; |
610 | ||
31b8006e SW |
611 | ceph_msg_put(msg); |
612 | } | |
613 | static void ceph_msg_remove_list(struct list_head *head) | |
614 | { | |
615 | while (!list_empty(head)) { | |
616 | struct ceph_msg *msg = list_first_entry(head, struct ceph_msg, | |
617 | list_head); | |
618 | ceph_msg_remove(msg); | |
619 | } | |
620 | } | |
621 | ||
622 | static void reset_connection(struct ceph_connection *con) | |
623 | { | |
624 | /* reset connection, out_queue, msg_ and connect_seq */ | |
625 | /* discard existing out_queue and msg_seq */ | |
0fa6ebc6 | 626 | dout("reset_connection %p\n", con); |
31b8006e SW |
627 | ceph_msg_remove_list(&con->out_queue); |
628 | ceph_msg_remove_list(&con->out_sent); | |
629 | ||
cf3e5c40 | 630 | if (con->in_msg) { |
38941f80 AE |
631 | BUG_ON(con->in_msg->con != con); |
632 | con->in_msg->con = NULL; | |
cf3e5c40 SW |
633 | ceph_msg_put(con->in_msg); |
634 | con->in_msg = NULL; | |
36eb71aa | 635 | con->ops->put(con); |
cf3e5c40 SW |
636 | } |
637 | ||
31b8006e SW |
638 | con->connect_seq = 0; |
639 | con->out_seq = 0; | |
c86a2930 SW |
640 | if (con->out_msg) { |
641 | ceph_msg_put(con->out_msg); | |
642 | con->out_msg = NULL; | |
643 | } | |
31b8006e | 644 | con->in_seq = 0; |
0e0d5e0c | 645 | con->in_seq_acked = 0; |
31b8006e SW |
646 | } |
647 | ||
648 | /* | |
649 | * mark a peer down. drop any open connections. | |
650 | */ | |
651 | void ceph_con_close(struct ceph_connection *con) | |
652 | { | |
8c50c817 | 653 | mutex_lock(&con->mutex); |
3d14c5d2 YS |
654 | dout("con_close %p peer %s\n", con, |
655 | ceph_pr_addr(&con->peer_addr.in_addr)); | |
8dacc7da | 656 | con->state = CON_STATE_CLOSED; |
a5988c49 | 657 | |
c9ffc77a AE |
658 | con_flag_clear(con, CON_FLAG_LOSSYTX); /* so we retry next connect */ |
659 | con_flag_clear(con, CON_FLAG_KEEPALIVE_PENDING); | |
660 | con_flag_clear(con, CON_FLAG_WRITE_PENDING); | |
661 | con_flag_clear(con, CON_FLAG_BACKOFF); | |
a5988c49 | 662 | |
31b8006e | 663 | reset_connection(con); |
6f2bc3ff | 664 | con->peer_global_seq = 0; |
91e45ce3 | 665 | cancel_delayed_work(&con->work); |
ee76e073 | 666 | con_close_socket(con); |
ec302645 | 667 | mutex_unlock(&con->mutex); |
31b8006e | 668 | } |
3d14c5d2 | 669 | EXPORT_SYMBOL(ceph_con_close); |
31b8006e | 670 | |
31b8006e SW |
671 | /* |
672 | * Reopen a closed connection, with a new peer address. | |
673 | */ | |
b7a9e5dd SW |
674 | void ceph_con_open(struct ceph_connection *con, |
675 | __u8 entity_type, __u64 entity_num, | |
676 | struct ceph_entity_addr *addr) | |
31b8006e | 677 | { |
5469155f | 678 | mutex_lock(&con->mutex); |
3d14c5d2 | 679 | dout("con_open %p %s\n", con, ceph_pr_addr(&addr->in_addr)); |
8dacc7da | 680 | |
122070a2 | 681 | WARN_ON(con->state != CON_STATE_CLOSED); |
8dacc7da | 682 | con->state = CON_STATE_PREOPEN; |
a5988c49 | 683 | |
b7a9e5dd SW |
684 | con->peer_name.type = (__u8) entity_type; |
685 | con->peer_name.num = cpu_to_le64(entity_num); | |
686 | ||
31b8006e | 687 | memcpy(&con->peer_addr, addr, sizeof(*addr)); |
03c677e1 | 688 | con->delay = 0; /* reset backoff memory */ |
5469155f | 689 | mutex_unlock(&con->mutex); |
31b8006e SW |
690 | queue_con(con); |
691 | } | |
3d14c5d2 | 692 | EXPORT_SYMBOL(ceph_con_open); |
31b8006e | 693 | |
87b315a5 SW |
694 | /* |
695 | * return true if this connection ever successfully opened | |
696 | */ | |
697 | bool ceph_con_opened(struct ceph_connection *con) | |
698 | { | |
699 | return con->connect_seq > 0; | |
700 | } | |
701 | ||
31b8006e SW |
702 | /* |
703 | * initialize a new connection. | |
704 | */ | |
1bfd89f4 AE |
705 | void ceph_con_init(struct ceph_connection *con, void *private, |
706 | const struct ceph_connection_operations *ops, | |
b7a9e5dd | 707 | struct ceph_messenger *msgr) |
31b8006e SW |
708 | { |
709 | dout("con_init %p\n", con); | |
710 | memset(con, 0, sizeof(*con)); | |
1bfd89f4 AE |
711 | con->private = private; |
712 | con->ops = ops; | |
31b8006e | 713 | con->msgr = msgr; |
ce2c8903 AE |
714 | |
715 | con_sock_state_init(con); | |
716 | ||
ec302645 | 717 | mutex_init(&con->mutex); |
31b8006e SW |
718 | INIT_LIST_HEAD(&con->out_queue); |
719 | INIT_LIST_HEAD(&con->out_sent); | |
720 | INIT_DELAYED_WORK(&con->work, con_work); | |
a5988c49 | 721 | |
8dacc7da | 722 | con->state = CON_STATE_CLOSED; |
31b8006e | 723 | } |
3d14c5d2 | 724 | EXPORT_SYMBOL(ceph_con_init); |
31b8006e SW |
725 | |
726 | ||
727 | /* | |
728 | * We maintain a global counter to order connection attempts. Get | |
729 | * a unique seq greater than @gt. | |
730 | */ | |
731 | static u32 get_global_seq(struct ceph_messenger *msgr, u32 gt) | |
732 | { | |
733 | u32 ret; | |
734 | ||
735 | spin_lock(&msgr->global_seq_lock); | |
736 | if (msgr->global_seq < gt) | |
737 | msgr->global_seq = gt; | |
738 | ret = ++msgr->global_seq; | |
739 | spin_unlock(&msgr->global_seq_lock); | |
740 | return ret; | |
741 | } | |
742 | ||
e2200423 | 743 | static void con_out_kvec_reset(struct ceph_connection *con) |
859eb799 AE |
744 | { |
745 | con->out_kvec_left = 0; | |
746 | con->out_kvec_bytes = 0; | |
747 | con->out_kvec_cur = &con->out_kvec[0]; | |
748 | } | |
749 | ||
e2200423 | 750 | static void con_out_kvec_add(struct ceph_connection *con, |
859eb799 AE |
751 | size_t size, void *data) |
752 | { | |
753 | int index; | |
754 | ||
755 | index = con->out_kvec_left; | |
756 | BUG_ON(index >= ARRAY_SIZE(con->out_kvec)); | |
757 | ||
758 | con->out_kvec[index].iov_len = size; | |
759 | con->out_kvec[index].iov_base = data; | |
760 | con->out_kvec_left++; | |
761 | con->out_kvec_bytes += size; | |
762 | } | |
31b8006e | 763 | |
df6ad1f9 | 764 | #ifdef CONFIG_BLOCK |
6aaa4511 AE |
765 | |
766 | /* | |
767 | * For a bio data item, a piece is whatever remains of the next | |
768 | * entry in the current bio iovec, or the first entry in the next | |
769 | * bio in the list. | |
770 | */ | |
8ae4f4f5 | 771 | static void ceph_msg_data_bio_cursor_init(struct ceph_msg_data_cursor *cursor, |
25aff7c5 | 772 | size_t length) |
6aaa4511 | 773 | { |
8ae4f4f5 | 774 | struct ceph_msg_data *data = cursor->data; |
6aaa4511 AE |
775 | struct bio *bio; |
776 | ||
777 | BUG_ON(data->type != CEPH_MSG_DATA_BIO); | |
778 | ||
779 | bio = data->bio; | |
780 | BUG_ON(!bio); | |
6aaa4511 | 781 | |
ca8b3a69 | 782 | cursor->resid = min(length, data->bio_length); |
6aaa4511 | 783 | cursor->bio = bio; |
f38a5181 KO |
784 | cursor->bvec_iter = bio->bi_iter; |
785 | cursor->last_piece = | |
786 | cursor->resid <= bio_iter_len(bio, cursor->bvec_iter); | |
6aaa4511 AE |
787 | } |
788 | ||
8ae4f4f5 | 789 | static struct page *ceph_msg_data_bio_next(struct ceph_msg_data_cursor *cursor, |
6aaa4511 AE |
790 | size_t *page_offset, |
791 | size_t *length) | |
792 | { | |
8ae4f4f5 | 793 | struct ceph_msg_data *data = cursor->data; |
6aaa4511 | 794 | struct bio *bio; |
f38a5181 | 795 | struct bio_vec bio_vec; |
6aaa4511 AE |
796 | |
797 | BUG_ON(data->type != CEPH_MSG_DATA_BIO); | |
798 | ||
799 | bio = cursor->bio; | |
800 | BUG_ON(!bio); | |
801 | ||
f38a5181 | 802 | bio_vec = bio_iter_iovec(bio, cursor->bvec_iter); |
6aaa4511 | 803 | |
f38a5181 | 804 | *page_offset = (size_t) bio_vec.bv_offset; |
6aaa4511 | 805 | BUG_ON(*page_offset >= PAGE_SIZE); |
25aff7c5 AE |
806 | if (cursor->last_piece) /* pagelist offset is always 0 */ |
807 | *length = cursor->resid; | |
808 | else | |
f38a5181 | 809 | *length = (size_t) bio_vec.bv_len; |
25aff7c5 | 810 | BUG_ON(*length > cursor->resid); |
5df521b1 | 811 | BUG_ON(*page_offset + *length > PAGE_SIZE); |
6aaa4511 | 812 | |
f38a5181 | 813 | return bio_vec.bv_page; |
6aaa4511 AE |
814 | } |
815 | ||
8ae4f4f5 AE |
816 | static bool ceph_msg_data_bio_advance(struct ceph_msg_data_cursor *cursor, |
817 | size_t bytes) | |
6aaa4511 | 818 | { |
6aaa4511 | 819 | struct bio *bio; |
f38a5181 | 820 | struct bio_vec bio_vec; |
6aaa4511 | 821 | |
8ae4f4f5 | 822 | BUG_ON(cursor->data->type != CEPH_MSG_DATA_BIO); |
6aaa4511 AE |
823 | |
824 | bio = cursor->bio; | |
825 | BUG_ON(!bio); | |
826 | ||
f38a5181 | 827 | bio_vec = bio_iter_iovec(bio, cursor->bvec_iter); |
6aaa4511 AE |
828 | |
829 | /* Advance the cursor offset */ | |
830 | ||
25aff7c5 AE |
831 | BUG_ON(cursor->resid < bytes); |
832 | cursor->resid -= bytes; | |
f38a5181 KO |
833 | |
834 | bio_advance_iter(bio, &cursor->bvec_iter, bytes); | |
835 | ||
836 | if (bytes < bio_vec.bv_len) | |
6aaa4511 AE |
837 | return false; /* more bytes to process in this segment */ |
838 | ||
839 | /* Move on to the next segment, and possibly the next bio */ | |
840 | ||
f38a5181 | 841 | if (!cursor->bvec_iter.bi_size) { |
6aaa4511 | 842 | bio = bio->bi_next; |
0ec1d15e ID |
843 | cursor->bio = bio; |
844 | if (bio) | |
845 | cursor->bvec_iter = bio->bi_iter; | |
846 | else | |
847 | memset(&cursor->bvec_iter, 0, | |
848 | sizeof(cursor->bvec_iter)); | |
6aaa4511 | 849 | } |
6aaa4511 | 850 | |
25aff7c5 AE |
851 | if (!cursor->last_piece) { |
852 | BUG_ON(!cursor->resid); | |
853 | BUG_ON(!bio); | |
854 | /* A short read is OK, so use <= rather than == */ | |
f38a5181 | 855 | if (cursor->resid <= bio_iter_len(bio, cursor->bvec_iter)) |
6aaa4511 | 856 | cursor->last_piece = true; |
25aff7c5 | 857 | } |
6aaa4511 AE |
858 | |
859 | return true; | |
860 | } | |
ea96571f | 861 | #endif /* CONFIG_BLOCK */ |
df6ad1f9 | 862 | |
e766d7b5 AE |
863 | /* |
864 | * For a page array, a piece comes from the first page in the array | |
865 | * that has not already been fully consumed. | |
866 | */ | |
8ae4f4f5 | 867 | static void ceph_msg_data_pages_cursor_init(struct ceph_msg_data_cursor *cursor, |
25aff7c5 | 868 | size_t length) |
e766d7b5 | 869 | { |
8ae4f4f5 | 870 | struct ceph_msg_data *data = cursor->data; |
e766d7b5 AE |
871 | int page_count; |
872 | ||
873 | BUG_ON(data->type != CEPH_MSG_DATA_PAGES); | |
874 | ||
875 | BUG_ON(!data->pages); | |
876 | BUG_ON(!data->length); | |
877 | ||
ca8b3a69 | 878 | cursor->resid = min(length, data->length); |
e766d7b5 | 879 | page_count = calc_pages_for(data->alignment, (u64)data->length); |
e766d7b5 AE |
880 | cursor->page_offset = data->alignment & ~PAGE_MASK; |
881 | cursor->page_index = 0; | |
56fc5659 AE |
882 | BUG_ON(page_count > (int)USHRT_MAX); |
883 | cursor->page_count = (unsigned short)page_count; | |
884 | BUG_ON(length > SIZE_MAX - cursor->page_offset); | |
885 | cursor->last_piece = (size_t)cursor->page_offset + length <= PAGE_SIZE; | |
e766d7b5 AE |
886 | } |
887 | ||
8ae4f4f5 AE |
888 | static struct page * |
889 | ceph_msg_data_pages_next(struct ceph_msg_data_cursor *cursor, | |
890 | size_t *page_offset, size_t *length) | |
e766d7b5 | 891 | { |
8ae4f4f5 | 892 | struct ceph_msg_data *data = cursor->data; |
e766d7b5 AE |
893 | |
894 | BUG_ON(data->type != CEPH_MSG_DATA_PAGES); | |
895 | ||
896 | BUG_ON(cursor->page_index >= cursor->page_count); | |
897 | BUG_ON(cursor->page_offset >= PAGE_SIZE); | |
e766d7b5 AE |
898 | |
899 | *page_offset = cursor->page_offset; | |
25aff7c5 | 900 | if (cursor->last_piece) |
e766d7b5 | 901 | *length = cursor->resid; |
25aff7c5 | 902 | else |
e766d7b5 | 903 | *length = PAGE_SIZE - *page_offset; |
e766d7b5 AE |
904 | |
905 | return data->pages[cursor->page_index]; | |
906 | } | |
907 | ||
8ae4f4f5 | 908 | static bool ceph_msg_data_pages_advance(struct ceph_msg_data_cursor *cursor, |
e766d7b5 AE |
909 | size_t bytes) |
910 | { | |
8ae4f4f5 | 911 | BUG_ON(cursor->data->type != CEPH_MSG_DATA_PAGES); |
e766d7b5 AE |
912 | |
913 | BUG_ON(cursor->page_offset + bytes > PAGE_SIZE); | |
e766d7b5 AE |
914 | |
915 | /* Advance the cursor page offset */ | |
916 | ||
917 | cursor->resid -= bytes; | |
5df521b1 AE |
918 | cursor->page_offset = (cursor->page_offset + bytes) & ~PAGE_MASK; |
919 | if (!bytes || cursor->page_offset) | |
e766d7b5 AE |
920 | return false; /* more bytes to process in the current page */ |
921 | ||
d90deda6 YZ |
922 | if (!cursor->resid) |
923 | return false; /* no more data */ | |
924 | ||
5df521b1 | 925 | /* Move on to the next page; offset is already at 0 */ |
e766d7b5 AE |
926 | |
927 | BUG_ON(cursor->page_index >= cursor->page_count); | |
e766d7b5 | 928 | cursor->page_index++; |
25aff7c5 | 929 | cursor->last_piece = cursor->resid <= PAGE_SIZE; |
e766d7b5 AE |
930 | |
931 | return true; | |
932 | } | |
933 | ||
fe38a2b6 | 934 | /* |
dd236fcb AE |
935 | * For a pagelist, a piece is whatever remains to be consumed in the |
936 | * first page in the list, or the front of the next page. | |
fe38a2b6 | 937 | */ |
8ae4f4f5 AE |
938 | static void |
939 | ceph_msg_data_pagelist_cursor_init(struct ceph_msg_data_cursor *cursor, | |
25aff7c5 | 940 | size_t length) |
fe38a2b6 | 941 | { |
8ae4f4f5 | 942 | struct ceph_msg_data *data = cursor->data; |
fe38a2b6 AE |
943 | struct ceph_pagelist *pagelist; |
944 | struct page *page; | |
945 | ||
dd236fcb | 946 | BUG_ON(data->type != CEPH_MSG_DATA_PAGELIST); |
fe38a2b6 AE |
947 | |
948 | pagelist = data->pagelist; | |
949 | BUG_ON(!pagelist); | |
25aff7c5 AE |
950 | |
951 | if (!length) | |
fe38a2b6 AE |
952 | return; /* pagelist can be assigned but empty */ |
953 | ||
954 | BUG_ON(list_empty(&pagelist->head)); | |
955 | page = list_first_entry(&pagelist->head, struct page, lru); | |
956 | ||
ca8b3a69 | 957 | cursor->resid = min(length, pagelist->length); |
fe38a2b6 AE |
958 | cursor->page = page; |
959 | cursor->offset = 0; | |
a51b272e | 960 | cursor->last_piece = cursor->resid <= PAGE_SIZE; |
fe38a2b6 AE |
961 | } |
962 | ||
8ae4f4f5 AE |
963 | static struct page * |
964 | ceph_msg_data_pagelist_next(struct ceph_msg_data_cursor *cursor, | |
965 | size_t *page_offset, size_t *length) | |
fe38a2b6 | 966 | { |
8ae4f4f5 | 967 | struct ceph_msg_data *data = cursor->data; |
fe38a2b6 | 968 | struct ceph_pagelist *pagelist; |
fe38a2b6 AE |
969 | |
970 | BUG_ON(data->type != CEPH_MSG_DATA_PAGELIST); | |
971 | ||
972 | pagelist = data->pagelist; | |
973 | BUG_ON(!pagelist); | |
974 | ||
975 | BUG_ON(!cursor->page); | |
25aff7c5 | 976 | BUG_ON(cursor->offset + cursor->resid != pagelist->length); |
fe38a2b6 | 977 | |
5df521b1 | 978 | /* offset of first page in pagelist is always 0 */ |
fe38a2b6 | 979 | *page_offset = cursor->offset & ~PAGE_MASK; |
5df521b1 | 980 | if (cursor->last_piece) |
25aff7c5 AE |
981 | *length = cursor->resid; |
982 | else | |
983 | *length = PAGE_SIZE - *page_offset; | |
fe38a2b6 | 984 | |
8ae4f4f5 | 985 | return cursor->page; |
fe38a2b6 AE |
986 | } |
987 | ||
8ae4f4f5 | 988 | static bool ceph_msg_data_pagelist_advance(struct ceph_msg_data_cursor *cursor, |
dd236fcb | 989 | size_t bytes) |
fe38a2b6 | 990 | { |
8ae4f4f5 | 991 | struct ceph_msg_data *data = cursor->data; |
fe38a2b6 AE |
992 | struct ceph_pagelist *pagelist; |
993 | ||
994 | BUG_ON(data->type != CEPH_MSG_DATA_PAGELIST); | |
995 | ||
996 | pagelist = data->pagelist; | |
997 | BUG_ON(!pagelist); | |
25aff7c5 AE |
998 | |
999 | BUG_ON(cursor->offset + cursor->resid != pagelist->length); | |
fe38a2b6 AE |
1000 | BUG_ON((cursor->offset & ~PAGE_MASK) + bytes > PAGE_SIZE); |
1001 | ||
1002 | /* Advance the cursor offset */ | |
1003 | ||
25aff7c5 | 1004 | cursor->resid -= bytes; |
fe38a2b6 | 1005 | cursor->offset += bytes; |
5df521b1 | 1006 | /* offset of first page in pagelist is always 0 */ |
fe38a2b6 AE |
1007 | if (!bytes || cursor->offset & ~PAGE_MASK) |
1008 | return false; /* more bytes to process in the current page */ | |
1009 | ||
d90deda6 YZ |
1010 | if (!cursor->resid) |
1011 | return false; /* no more data */ | |
1012 | ||
fe38a2b6 AE |
1013 | /* Move on to the next page */ |
1014 | ||
1015 | BUG_ON(list_is_last(&cursor->page->lru, &pagelist->head)); | |
1016 | cursor->page = list_entry_next(cursor->page, lru); | |
25aff7c5 | 1017 | cursor->last_piece = cursor->resid <= PAGE_SIZE; |
fe38a2b6 AE |
1018 | |
1019 | return true; | |
1020 | } | |
1021 | ||
dd236fcb AE |
1022 | /* |
1023 | * Message data is handled (sent or received) in pieces, where each | |
1024 | * piece resides on a single page. The network layer might not | |
1025 | * consume an entire piece at once. A data item's cursor keeps | |
1026 | * track of which piece is next to process and how much remains to | |
1027 | * be processed in that piece. It also tracks whether the current | |
1028 | * piece is the last one in the data item. | |
1029 | */ | |
ca8b3a69 | 1030 | static void __ceph_msg_data_cursor_init(struct ceph_msg_data_cursor *cursor) |
dd236fcb | 1031 | { |
ca8b3a69 | 1032 | size_t length = cursor->total_resid; |
8ae4f4f5 | 1033 | |
8ae4f4f5 | 1034 | switch (cursor->data->type) { |
dd236fcb | 1035 | case CEPH_MSG_DATA_PAGELIST: |
8ae4f4f5 | 1036 | ceph_msg_data_pagelist_cursor_init(cursor, length); |
dd236fcb | 1037 | break; |
e766d7b5 | 1038 | case CEPH_MSG_DATA_PAGES: |
8ae4f4f5 | 1039 | ceph_msg_data_pages_cursor_init(cursor, length); |
e766d7b5 | 1040 | break; |
dd236fcb AE |
1041 | #ifdef CONFIG_BLOCK |
1042 | case CEPH_MSG_DATA_BIO: | |
8ae4f4f5 | 1043 | ceph_msg_data_bio_cursor_init(cursor, length); |
6aaa4511 | 1044 | break; |
dd236fcb | 1045 | #endif /* CONFIG_BLOCK */ |
6aaa4511 | 1046 | case CEPH_MSG_DATA_NONE: |
dd236fcb AE |
1047 | default: |
1048 | /* BUG(); */ | |
1049 | break; | |
1050 | } | |
8ae4f4f5 | 1051 | cursor->need_crc = true; |
dd236fcb AE |
1052 | } |
1053 | ||
ca8b3a69 AE |
1054 | static void ceph_msg_data_cursor_init(struct ceph_msg *msg, size_t length) |
1055 | { | |
1056 | struct ceph_msg_data_cursor *cursor = &msg->cursor; | |
1057 | struct ceph_msg_data *data; | |
1058 | ||
1059 | BUG_ON(!length); | |
1060 | BUG_ON(length > msg->data_length); | |
1061 | BUG_ON(list_empty(&msg->data)); | |
1062 | ||
ca8b3a69 AE |
1063 | cursor->data_head = &msg->data; |
1064 | cursor->total_resid = length; | |
1065 | data = list_first_entry(&msg->data, struct ceph_msg_data, links); | |
1066 | cursor->data = data; | |
1067 | ||
1068 | __ceph_msg_data_cursor_init(cursor); | |
1069 | } | |
1070 | ||
dd236fcb AE |
1071 | /* |
1072 | * Return the page containing the next piece to process for a given | |
1073 | * data item, and supply the page offset and length of that piece. | |
1074 | * Indicate whether this is the last piece in this data item. | |
1075 | */ | |
8ae4f4f5 AE |
1076 | static struct page *ceph_msg_data_next(struct ceph_msg_data_cursor *cursor, |
1077 | size_t *page_offset, size_t *length, | |
dd236fcb AE |
1078 | bool *last_piece) |
1079 | { | |
1080 | struct page *page; | |
1081 | ||
8ae4f4f5 | 1082 | switch (cursor->data->type) { |
dd236fcb | 1083 | case CEPH_MSG_DATA_PAGELIST: |
8ae4f4f5 | 1084 | page = ceph_msg_data_pagelist_next(cursor, page_offset, length); |
dd236fcb | 1085 | break; |
e766d7b5 | 1086 | case CEPH_MSG_DATA_PAGES: |
8ae4f4f5 | 1087 | page = ceph_msg_data_pages_next(cursor, page_offset, length); |
e766d7b5 | 1088 | break; |
dd236fcb AE |
1089 | #ifdef CONFIG_BLOCK |
1090 | case CEPH_MSG_DATA_BIO: | |
8ae4f4f5 | 1091 | page = ceph_msg_data_bio_next(cursor, page_offset, length); |
6aaa4511 | 1092 | break; |
dd236fcb | 1093 | #endif /* CONFIG_BLOCK */ |
6aaa4511 | 1094 | case CEPH_MSG_DATA_NONE: |
dd236fcb AE |
1095 | default: |
1096 | page = NULL; | |
1097 | break; | |
1098 | } | |
1099 | BUG_ON(!page); | |
1100 | BUG_ON(*page_offset + *length > PAGE_SIZE); | |
1101 | BUG_ON(!*length); | |
1102 | if (last_piece) | |
8ae4f4f5 | 1103 | *last_piece = cursor->last_piece; |
dd236fcb AE |
1104 | |
1105 | return page; | |
1106 | } | |
1107 | ||
1108 | /* | |
1109 | * Returns true if the result moves the cursor on to the next piece | |
1110 | * of the data item. | |
1111 | */ | |
8ae4f4f5 AE |
1112 | static bool ceph_msg_data_advance(struct ceph_msg_data_cursor *cursor, |
1113 | size_t bytes) | |
dd236fcb AE |
1114 | { |
1115 | bool new_piece; | |
1116 | ||
25aff7c5 | 1117 | BUG_ON(bytes > cursor->resid); |
8ae4f4f5 | 1118 | switch (cursor->data->type) { |
dd236fcb | 1119 | case CEPH_MSG_DATA_PAGELIST: |
8ae4f4f5 | 1120 | new_piece = ceph_msg_data_pagelist_advance(cursor, bytes); |
dd236fcb | 1121 | break; |
e766d7b5 | 1122 | case CEPH_MSG_DATA_PAGES: |
8ae4f4f5 | 1123 | new_piece = ceph_msg_data_pages_advance(cursor, bytes); |
e766d7b5 | 1124 | break; |
dd236fcb AE |
1125 | #ifdef CONFIG_BLOCK |
1126 | case CEPH_MSG_DATA_BIO: | |
8ae4f4f5 | 1127 | new_piece = ceph_msg_data_bio_advance(cursor, bytes); |
6aaa4511 | 1128 | break; |
dd236fcb | 1129 | #endif /* CONFIG_BLOCK */ |
6aaa4511 | 1130 | case CEPH_MSG_DATA_NONE: |
dd236fcb AE |
1131 | default: |
1132 | BUG(); | |
1133 | break; | |
1134 | } | |
ca8b3a69 | 1135 | cursor->total_resid -= bytes; |
dd236fcb | 1136 | |
ca8b3a69 AE |
1137 | if (!cursor->resid && cursor->total_resid) { |
1138 | WARN_ON(!cursor->last_piece); | |
1139 | BUG_ON(list_is_last(&cursor->data->links, cursor->data_head)); | |
1140 | cursor->data = list_entry_next(cursor->data, links); | |
1141 | __ceph_msg_data_cursor_init(cursor); | |
a51b272e | 1142 | new_piece = true; |
ca8b3a69 | 1143 | } |
a51b272e | 1144 | cursor->need_crc = new_piece; |
ca8b3a69 | 1145 | |
dd236fcb AE |
1146 | return new_piece; |
1147 | } | |
1148 | ||
98fa5dd8 | 1149 | static void prepare_message_data(struct ceph_msg *msg, u32 data_len) |
739c905b | 1150 | { |
739c905b | 1151 | BUG_ON(!msg); |
25aff7c5 | 1152 | BUG_ON(!data_len); |
739c905b | 1153 | |
4c59b4a2 | 1154 | /* Initialize data cursor */ |
fe38a2b6 | 1155 | |
8ae4f4f5 | 1156 | ceph_msg_data_cursor_init(msg, (size_t)data_len); |
739c905b AE |
1157 | } |
1158 | ||
31b8006e SW |
1159 | /* |
1160 | * Prepare footer for currently outgoing message, and finish things | |
1161 | * off. Assumes out_kvec* are already valid.. we just add on to the end. | |
1162 | */ | |
859eb799 | 1163 | static void prepare_write_message_footer(struct ceph_connection *con) |
31b8006e SW |
1164 | { |
1165 | struct ceph_msg *m = con->out_msg; | |
859eb799 | 1166 | int v = con->out_kvec_left; |
31b8006e | 1167 | |
fd154f3c AE |
1168 | m->footer.flags |= CEPH_MSG_FOOTER_COMPLETE; |
1169 | ||
31b8006e SW |
1170 | dout("prepare_write_message_footer %p\n", con); |
1171 | con->out_kvec_is_msg = true; | |
1172 | con->out_kvec[v].iov_base = &m->footer; | |
1173 | con->out_kvec[v].iov_len = sizeof(m->footer); | |
1174 | con->out_kvec_bytes += sizeof(m->footer); | |
1175 | con->out_kvec_left++; | |
1176 | con->out_more = m->more_to_follow; | |
c86a2930 | 1177 | con->out_msg_done = true; |
31b8006e SW |
1178 | } |
1179 | ||
1180 | /* | |
1181 | * Prepare headers for the next outgoing message. | |
1182 | */ | |
1183 | static void prepare_write_message(struct ceph_connection *con) | |
1184 | { | |
1185 | struct ceph_msg *m; | |
a9a0c51a | 1186 | u32 crc; |
31b8006e | 1187 | |
e2200423 | 1188 | con_out_kvec_reset(con); |
31b8006e | 1189 | con->out_kvec_is_msg = true; |
c86a2930 | 1190 | con->out_msg_done = false; |
31b8006e SW |
1191 | |
1192 | /* Sneak an ack in there first? If we can get it into the same | |
1193 | * TCP packet that's a good thing. */ | |
1194 | if (con->in_seq > con->in_seq_acked) { | |
1195 | con->in_seq_acked = con->in_seq; | |
e2200423 | 1196 | con_out_kvec_add(con, sizeof (tag_ack), &tag_ack); |
31b8006e | 1197 | con->out_temp_ack = cpu_to_le64(con->in_seq_acked); |
e2200423 | 1198 | con_out_kvec_add(con, sizeof (con->out_temp_ack), |
859eb799 | 1199 | &con->out_temp_ack); |
31b8006e SW |
1200 | } |
1201 | ||
38941f80 | 1202 | BUG_ON(list_empty(&con->out_queue)); |
859eb799 | 1203 | m = list_first_entry(&con->out_queue, struct ceph_msg, list_head); |
c86a2930 | 1204 | con->out_msg = m; |
38941f80 | 1205 | BUG_ON(m->con != con); |
4cf9d544 SW |
1206 | |
1207 | /* put message on sent list */ | |
1208 | ceph_msg_get(m); | |
1209 | list_move_tail(&m->list_head, &con->out_sent); | |
31b8006e | 1210 | |
e84346b7 SW |
1211 | /* |
1212 | * only assign outgoing seq # if we haven't sent this message | |
1213 | * yet. if it is requeued, resend with it's original seq. | |
1214 | */ | |
1215 | if (m->needs_out_seq) { | |
1216 | m->hdr.seq = cpu_to_le64(++con->out_seq); | |
1217 | m->needs_out_seq = false; | |
1218 | } | |
98fa5dd8 | 1219 | WARN_ON(m->data_length != le32_to_cpu(m->hdr.data_len)); |
31b8006e | 1220 | |
98fa5dd8 | 1221 | dout("prepare_write_message %p seq %lld type %d len %d+%d+%zd\n", |
31b8006e SW |
1222 | m, con->out_seq, le16_to_cpu(m->hdr.type), |
1223 | le32_to_cpu(m->hdr.front_len), le32_to_cpu(m->hdr.middle_len), | |
98fa5dd8 | 1224 | m->data_length); |
31b8006e SW |
1225 | BUG_ON(le32_to_cpu(m->hdr.front_len) != m->front.iov_len); |
1226 | ||
1227 | /* tag + hdr + front + middle */ | |
e2200423 AE |
1228 | con_out_kvec_add(con, sizeof (tag_msg), &tag_msg); |
1229 | con_out_kvec_add(con, sizeof (m->hdr), &m->hdr); | |
1230 | con_out_kvec_add(con, m->front.iov_len, m->front.iov_base); | |
859eb799 | 1231 | |
31b8006e | 1232 | if (m->middle) |
e2200423 | 1233 | con_out_kvec_add(con, m->middle->vec.iov_len, |
859eb799 | 1234 | m->middle->vec.iov_base); |
31b8006e SW |
1235 | |
1236 | /* fill in crc (except data pages), footer */ | |
a9a0c51a AE |
1237 | crc = crc32c(0, &m->hdr, offsetof(struct ceph_msg_header, crc)); |
1238 | con->out_msg->hdr.crc = cpu_to_le32(crc); | |
fd154f3c | 1239 | con->out_msg->footer.flags = 0; |
a9a0c51a AE |
1240 | |
1241 | crc = crc32c(0, m->front.iov_base, m->front.iov_len); | |
1242 | con->out_msg->footer.front_crc = cpu_to_le32(crc); | |
1243 | if (m->middle) { | |
1244 | crc = crc32c(0, m->middle->vec.iov_base, | |
1245 | m->middle->vec.iov_len); | |
1246 | con->out_msg->footer.middle_crc = cpu_to_le32(crc); | |
1247 | } else | |
31b8006e | 1248 | con->out_msg->footer.middle_crc = 0; |
739c905b | 1249 | dout("%s front_crc %u middle_crc %u\n", __func__, |
31b8006e SW |
1250 | le32_to_cpu(con->out_msg->footer.front_crc), |
1251 | le32_to_cpu(con->out_msg->footer.middle_crc)); | |
1252 | ||
1253 | /* is there a data payload? */ | |
739c905b | 1254 | con->out_msg->footer.data_crc = 0; |
98fa5dd8 AE |
1255 | if (m->data_length) { |
1256 | prepare_message_data(con->out_msg, m->data_length); | |
78625051 AE |
1257 | con->out_more = 1; /* data + footer will follow */ |
1258 | } else { | |
31b8006e | 1259 | /* no, queue up footer too and be done */ |
859eb799 | 1260 | prepare_write_message_footer(con); |
78625051 | 1261 | } |
31b8006e | 1262 | |
c9ffc77a | 1263 | con_flag_set(con, CON_FLAG_WRITE_PENDING); |
31b8006e SW |
1264 | } |
1265 | ||
1266 | /* | |
1267 | * Prepare an ack. | |
1268 | */ | |
1269 | static void prepare_write_ack(struct ceph_connection *con) | |
1270 | { | |
1271 | dout("prepare_write_ack %p %llu -> %llu\n", con, | |
1272 | con->in_seq_acked, con->in_seq); | |
1273 | con->in_seq_acked = con->in_seq; | |
1274 | ||
e2200423 | 1275 | con_out_kvec_reset(con); |
859eb799 | 1276 | |
e2200423 | 1277 | con_out_kvec_add(con, sizeof (tag_ack), &tag_ack); |
859eb799 | 1278 | |
31b8006e | 1279 | con->out_temp_ack = cpu_to_le64(con->in_seq_acked); |
e2200423 | 1280 | con_out_kvec_add(con, sizeof (con->out_temp_ack), |
859eb799 AE |
1281 | &con->out_temp_ack); |
1282 | ||
31b8006e | 1283 | con->out_more = 1; /* more will follow.. eventually.. */ |
c9ffc77a | 1284 | con_flag_set(con, CON_FLAG_WRITE_PENDING); |
31b8006e SW |
1285 | } |
1286 | ||
3a23083b SW |
1287 | /* |
1288 | * Prepare to share the seq during handshake | |
1289 | */ | |
1290 | static void prepare_write_seq(struct ceph_connection *con) | |
1291 | { | |
1292 | dout("prepare_write_seq %p %llu -> %llu\n", con, | |
1293 | con->in_seq_acked, con->in_seq); | |
1294 | con->in_seq_acked = con->in_seq; | |
1295 | ||
1296 | con_out_kvec_reset(con); | |
1297 | ||
1298 | con->out_temp_ack = cpu_to_le64(con->in_seq_acked); | |
1299 | con_out_kvec_add(con, sizeof (con->out_temp_ack), | |
1300 | &con->out_temp_ack); | |
1301 | ||
1302 | con_flag_set(con, CON_FLAG_WRITE_PENDING); | |
1303 | } | |
1304 | ||
31b8006e SW |
1305 | /* |
1306 | * Prepare to write keepalive byte. | |
1307 | */ | |
1308 | static void prepare_write_keepalive(struct ceph_connection *con) | |
1309 | { | |
1310 | dout("prepare_write_keepalive %p\n", con); | |
e2200423 AE |
1311 | con_out_kvec_reset(con); |
1312 | con_out_kvec_add(con, sizeof (tag_keepalive), &tag_keepalive); | |
c9ffc77a | 1313 | con_flag_set(con, CON_FLAG_WRITE_PENDING); |
31b8006e SW |
1314 | } |
1315 | ||
1316 | /* | |
1317 | * Connection negotiation. | |
1318 | */ | |
1319 | ||
dac1e716 AE |
1320 | static struct ceph_auth_handshake *get_connect_authorizer(struct ceph_connection *con, |
1321 | int *auth_proto) | |
4e7a5dcd | 1322 | { |
a3530df3 | 1323 | struct ceph_auth_handshake *auth; |
b1c6b980 AE |
1324 | |
1325 | if (!con->ops->get_authorizer) { | |
1326 | con->out_connect.authorizer_protocol = CEPH_AUTH_UNKNOWN; | |
1327 | con->out_connect.authorizer_len = 0; | |
729796be | 1328 | return NULL; |
b1c6b980 AE |
1329 | } |
1330 | ||
1331 | /* Can't hold the mutex while getting authorizer */ | |
ec302645 | 1332 | mutex_unlock(&con->mutex); |
dac1e716 | 1333 | auth = con->ops->get_authorizer(con, auth_proto, con->auth_retry); |
ec302645 | 1334 | mutex_lock(&con->mutex); |
4e7a5dcd | 1335 | |
a3530df3 | 1336 | if (IS_ERR(auth)) |
729796be | 1337 | return auth; |
8dacc7da | 1338 | if (con->state != CON_STATE_NEGOTIATING) |
729796be | 1339 | return ERR_PTR(-EAGAIN); |
0da5d703 | 1340 | |
8f43fb53 AE |
1341 | con->auth_reply_buf = auth->authorizer_reply_buf; |
1342 | con->auth_reply_buf_len = auth->authorizer_reply_buf_len; | |
729796be | 1343 | return auth; |
4e7a5dcd SW |
1344 | } |
1345 | ||
31b8006e SW |
1346 | /* |
1347 | * We connected to a peer and are saying hello. | |
1348 | */ | |
e825a66d | 1349 | static void prepare_write_banner(struct ceph_connection *con) |
31b8006e | 1350 | { |
e2200423 AE |
1351 | con_out_kvec_add(con, strlen(CEPH_BANNER), CEPH_BANNER); |
1352 | con_out_kvec_add(con, sizeof (con->msgr->my_enc_addr), | |
e825a66d | 1353 | &con->msgr->my_enc_addr); |
eed0ef2c | 1354 | |
eed0ef2c | 1355 | con->out_more = 0; |
c9ffc77a | 1356 | con_flag_set(con, CON_FLAG_WRITE_PENDING); |
eed0ef2c SW |
1357 | } |
1358 | ||
e825a66d | 1359 | static int prepare_write_connect(struct ceph_connection *con) |
eed0ef2c | 1360 | { |
95c96174 | 1361 | unsigned int global_seq = get_global_seq(con->msgr, 0); |
31b8006e | 1362 | int proto; |
dac1e716 | 1363 | int auth_proto; |
729796be | 1364 | struct ceph_auth_handshake *auth; |
31b8006e SW |
1365 | |
1366 | switch (con->peer_name.type) { | |
1367 | case CEPH_ENTITY_TYPE_MON: | |
1368 | proto = CEPH_MONC_PROTOCOL; | |
1369 | break; | |
1370 | case CEPH_ENTITY_TYPE_OSD: | |
1371 | proto = CEPH_OSDC_PROTOCOL; | |
1372 | break; | |
1373 | case CEPH_ENTITY_TYPE_MDS: | |
1374 | proto = CEPH_MDSC_PROTOCOL; | |
1375 | break; | |
1376 | default: | |
1377 | BUG(); | |
1378 | } | |
1379 | ||
1380 | dout("prepare_write_connect %p cseq=%d gseq=%d proto=%d\n", con, | |
1381 | con->connect_seq, global_seq, proto); | |
4e7a5dcd | 1382 | |
e825a66d | 1383 | con->out_connect.features = cpu_to_le64(con->msgr->supported_features); |
31b8006e SW |
1384 | con->out_connect.host_type = cpu_to_le32(CEPH_ENTITY_TYPE_CLIENT); |
1385 | con->out_connect.connect_seq = cpu_to_le32(con->connect_seq); | |
1386 | con->out_connect.global_seq = cpu_to_le32(global_seq); | |
1387 | con->out_connect.protocol_version = cpu_to_le32(proto); | |
1388 | con->out_connect.flags = 0; | |
31b8006e | 1389 | |
dac1e716 AE |
1390 | auth_proto = CEPH_AUTH_UNKNOWN; |
1391 | auth = get_connect_authorizer(con, &auth_proto); | |
729796be AE |
1392 | if (IS_ERR(auth)) |
1393 | return PTR_ERR(auth); | |
3da54776 | 1394 | |
dac1e716 | 1395 | con->out_connect.authorizer_protocol = cpu_to_le32(auth_proto); |
3da54776 AE |
1396 | con->out_connect.authorizer_len = auth ? |
1397 | cpu_to_le32(auth->authorizer_buf_len) : 0; | |
1398 | ||
e2200423 | 1399 | con_out_kvec_add(con, sizeof (con->out_connect), |
3da54776 AE |
1400 | &con->out_connect); |
1401 | if (auth && auth->authorizer_buf_len) | |
e2200423 | 1402 | con_out_kvec_add(con, auth->authorizer_buf_len, |
3da54776 | 1403 | auth->authorizer_buf); |
859eb799 | 1404 | |
31b8006e | 1405 | con->out_more = 0; |
c9ffc77a | 1406 | con_flag_set(con, CON_FLAG_WRITE_PENDING); |
4e7a5dcd | 1407 | |
e10c758e | 1408 | return 0; |
31b8006e SW |
1409 | } |
1410 | ||
31b8006e SW |
1411 | /* |
1412 | * write as much of pending kvecs to the socket as we can. | |
1413 | * 1 -> done | |
1414 | * 0 -> socket full, but more to do | |
1415 | * <0 -> error | |
1416 | */ | |
1417 | static int write_partial_kvec(struct ceph_connection *con) | |
1418 | { | |
1419 | int ret; | |
1420 | ||
1421 | dout("write_partial_kvec %p %d left\n", con, con->out_kvec_bytes); | |
1422 | while (con->out_kvec_bytes > 0) { | |
1423 | ret = ceph_tcp_sendmsg(con->sock, con->out_kvec_cur, | |
1424 | con->out_kvec_left, con->out_kvec_bytes, | |
1425 | con->out_more); | |
1426 | if (ret <= 0) | |
1427 | goto out; | |
1428 | con->out_kvec_bytes -= ret; | |
1429 | if (con->out_kvec_bytes == 0) | |
1430 | break; /* done */ | |
f42299e6 AE |
1431 | |
1432 | /* account for full iov entries consumed */ | |
1433 | while (ret >= con->out_kvec_cur->iov_len) { | |
1434 | BUG_ON(!con->out_kvec_left); | |
1435 | ret -= con->out_kvec_cur->iov_len; | |
1436 | con->out_kvec_cur++; | |
1437 | con->out_kvec_left--; | |
1438 | } | |
1439 | /* and for a partially-consumed entry */ | |
1440 | if (ret) { | |
1441 | con->out_kvec_cur->iov_len -= ret; | |
1442 | con->out_kvec_cur->iov_base += ret; | |
31b8006e SW |
1443 | } |
1444 | } | |
1445 | con->out_kvec_left = 0; | |
1446 | con->out_kvec_is_msg = false; | |
1447 | ret = 1; | |
1448 | out: | |
1449 | dout("write_partial_kvec %p %d left in %d kvecs ret = %d\n", con, | |
1450 | con->out_kvec_bytes, con->out_kvec_left, ret); | |
1451 | return ret; /* done! */ | |
1452 | } | |
1453 | ||
35b62808 AE |
1454 | static u32 ceph_crc32c_page(u32 crc, struct page *page, |
1455 | unsigned int page_offset, | |
1456 | unsigned int length) | |
1457 | { | |
1458 | char *kaddr; | |
1459 | ||
1460 | kaddr = kmap(page); | |
1461 | BUG_ON(kaddr == NULL); | |
1462 | crc = crc32c(crc, kaddr + page_offset, length); | |
1463 | kunmap(page); | |
1464 | ||
1465 | return crc; | |
1466 | } | |
31b8006e SW |
1467 | /* |
1468 | * Write as much message data payload as we can. If we finish, queue | |
1469 | * up the footer. | |
1470 | * 1 -> done, footer is now queued in out_kvec[]. | |
1471 | * 0 -> socket full, but more to do | |
1472 | * <0 -> error | |
1473 | */ | |
34d2d200 | 1474 | static int write_partial_message_data(struct ceph_connection *con) |
31b8006e SW |
1475 | { |
1476 | struct ceph_msg *msg = con->out_msg; | |
8ae4f4f5 | 1477 | struct ceph_msg_data_cursor *cursor = &msg->cursor; |
37675b0f | 1478 | bool do_datacrc = !con->msgr->nocrc; |
f5db90bc | 1479 | u32 crc; |
31b8006e | 1480 | |
859a35d5 | 1481 | dout("%s %p msg %p\n", __func__, con, msg); |
31b8006e | 1482 | |
5240d9f9 | 1483 | if (list_empty(&msg->data)) |
4c59b4a2 AE |
1484 | return -EINVAL; |
1485 | ||
5821bd8c AE |
1486 | /* |
1487 | * Iterate through each page that contains data to be | |
1488 | * written, and send as much as possible for each. | |
1489 | * | |
1490 | * If we are calculating the data crc (the default), we will | |
1491 | * need to map the page. If we have no pages, they have | |
1492 | * been revoked, so use the zero page. | |
1493 | */ | |
f5db90bc | 1494 | crc = do_datacrc ? le32_to_cpu(msg->footer.data_crc) : 0; |
643c68a4 | 1495 | while (cursor->resid) { |
8a166d05 | 1496 | struct page *page; |
e387d525 AE |
1497 | size_t page_offset; |
1498 | size_t length; | |
8a166d05 | 1499 | bool last_piece; |
8ea299bc | 1500 | bool need_crc; |
f5db90bc | 1501 | int ret; |
68b4476b | 1502 | |
8ae4f4f5 | 1503 | page = ceph_msg_data_next(&msg->cursor, &page_offset, &length, |
4c59b4a2 | 1504 | &last_piece); |
e387d525 | 1505 | ret = ceph_tcp_sendpage(con->sock, page, page_offset, |
fe38a2b6 | 1506 | length, last_piece); |
f5db90bc AE |
1507 | if (ret <= 0) { |
1508 | if (do_datacrc) | |
1509 | msg->footer.data_crc = cpu_to_le32(crc); | |
31b8006e | 1510 | |
f5db90bc AE |
1511 | return ret; |
1512 | } | |
143334ff AE |
1513 | if (do_datacrc && cursor->need_crc) |
1514 | crc = ceph_crc32c_page(crc, page, page_offset, length); | |
8ae4f4f5 | 1515 | need_crc = ceph_msg_data_advance(&msg->cursor, (size_t)ret); |
31b8006e SW |
1516 | } |
1517 | ||
34d2d200 | 1518 | dout("%s %p msg %p done\n", __func__, con, msg); |
31b8006e SW |
1519 | |
1520 | /* prepare and queue up footer, too */ | |
f5db90bc AE |
1521 | if (do_datacrc) |
1522 | msg->footer.data_crc = cpu_to_le32(crc); | |
1523 | else | |
84ca8fc8 | 1524 | msg->footer.flags |= CEPH_MSG_FOOTER_NOCRC; |
e2200423 | 1525 | con_out_kvec_reset(con); |
859eb799 | 1526 | prepare_write_message_footer(con); |
f5db90bc AE |
1527 | |
1528 | return 1; /* must return > 0 to indicate success */ | |
31b8006e SW |
1529 | } |
1530 | ||
1531 | /* | |
1532 | * write some zeros | |
1533 | */ | |
1534 | static int write_partial_skip(struct ceph_connection *con) | |
1535 | { | |
1536 | int ret; | |
1537 | ||
1538 | while (con->out_skip > 0) { | |
31739139 | 1539 | size_t size = min(con->out_skip, (int) PAGE_CACHE_SIZE); |
31b8006e | 1540 | |
e1dcb128 | 1541 | ret = ceph_tcp_sendpage(con->sock, zero_page, 0, size, true); |
31b8006e SW |
1542 | if (ret <= 0) |
1543 | goto out; | |
1544 | con->out_skip -= ret; | |
1545 | } | |
1546 | ret = 1; | |
1547 | out: | |
1548 | return ret; | |
1549 | } | |
1550 | ||
1551 | /* | |
1552 | * Prepare to read connection handshake, or an ack. | |
1553 | */ | |
eed0ef2c SW |
1554 | static void prepare_read_banner(struct ceph_connection *con) |
1555 | { | |
1556 | dout("prepare_read_banner %p\n", con); | |
1557 | con->in_base_pos = 0; | |
1558 | } | |
1559 | ||
31b8006e SW |
1560 | static void prepare_read_connect(struct ceph_connection *con) |
1561 | { | |
1562 | dout("prepare_read_connect %p\n", con); | |
1563 | con->in_base_pos = 0; | |
1564 | } | |
1565 | ||
1566 | static void prepare_read_ack(struct ceph_connection *con) | |
1567 | { | |
1568 | dout("prepare_read_ack %p\n", con); | |
1569 | con->in_base_pos = 0; | |
1570 | } | |
1571 | ||
3a23083b SW |
1572 | static void prepare_read_seq(struct ceph_connection *con) |
1573 | { | |
1574 | dout("prepare_read_seq %p\n", con); | |
1575 | con->in_base_pos = 0; | |
1576 | con->in_tag = CEPH_MSGR_TAG_SEQ; | |
1577 | } | |
1578 | ||
31b8006e SW |
1579 | static void prepare_read_tag(struct ceph_connection *con) |
1580 | { | |
1581 | dout("prepare_read_tag %p\n", con); | |
1582 | con->in_base_pos = 0; | |
1583 | con->in_tag = CEPH_MSGR_TAG_READY; | |
1584 | } | |
1585 | ||
1586 | /* | |
1587 | * Prepare to read a message. | |
1588 | */ | |
1589 | static int prepare_read_message(struct ceph_connection *con) | |
1590 | { | |
1591 | dout("prepare_read_message %p\n", con); | |
1592 | BUG_ON(con->in_msg != NULL); | |
1593 | con->in_base_pos = 0; | |
1594 | con->in_front_crc = con->in_middle_crc = con->in_data_crc = 0; | |
1595 | return 0; | |
1596 | } | |
1597 | ||
1598 | ||
1599 | static int read_partial(struct ceph_connection *con, | |
fd51653f | 1600 | int end, int size, void *object) |
31b8006e | 1601 | { |
e6cee71f AE |
1602 | while (con->in_base_pos < end) { |
1603 | int left = end - con->in_base_pos; | |
31b8006e SW |
1604 | int have = size - left; |
1605 | int ret = ceph_tcp_recvmsg(con->sock, object + have, left); | |
1606 | if (ret <= 0) | |
1607 | return ret; | |
1608 | con->in_base_pos += ret; | |
1609 | } | |
1610 | return 1; | |
1611 | } | |
1612 | ||
1613 | ||
1614 | /* | |
1615 | * Read all or part of the connect-side handshake on a new connection | |
1616 | */ | |
eed0ef2c | 1617 | static int read_partial_banner(struct ceph_connection *con) |
31b8006e | 1618 | { |
fd51653f AE |
1619 | int size; |
1620 | int end; | |
1621 | int ret; | |
31b8006e | 1622 | |
eed0ef2c | 1623 | dout("read_partial_banner %p at %d\n", con, con->in_base_pos); |
31b8006e SW |
1624 | |
1625 | /* peer's banner */ | |
fd51653f AE |
1626 | size = strlen(CEPH_BANNER); |
1627 | end = size; | |
1628 | ret = read_partial(con, end, size, con->in_banner); | |
31b8006e SW |
1629 | if (ret <= 0) |
1630 | goto out; | |
fd51653f AE |
1631 | |
1632 | size = sizeof (con->actual_peer_addr); | |
1633 | end += size; | |
1634 | ret = read_partial(con, end, size, &con->actual_peer_addr); | |
31b8006e SW |
1635 | if (ret <= 0) |
1636 | goto out; | |
fd51653f AE |
1637 | |
1638 | size = sizeof (con->peer_addr_for_me); | |
1639 | end += size; | |
1640 | ret = read_partial(con, end, size, &con->peer_addr_for_me); | |
31b8006e SW |
1641 | if (ret <= 0) |
1642 | goto out; | |
fd51653f | 1643 | |
eed0ef2c SW |
1644 | out: |
1645 | return ret; | |
1646 | } | |
1647 | ||
1648 | static int read_partial_connect(struct ceph_connection *con) | |
1649 | { | |
fd51653f AE |
1650 | int size; |
1651 | int end; | |
1652 | int ret; | |
eed0ef2c SW |
1653 | |
1654 | dout("read_partial_connect %p at %d\n", con, con->in_base_pos); | |
1655 | ||
fd51653f AE |
1656 | size = sizeof (con->in_reply); |
1657 | end = size; | |
1658 | ret = read_partial(con, end, size, &con->in_reply); | |
31b8006e SW |
1659 | if (ret <= 0) |
1660 | goto out; | |
fd51653f AE |
1661 | |
1662 | size = le32_to_cpu(con->in_reply.authorizer_len); | |
1663 | end += size; | |
1664 | ret = read_partial(con, end, size, con->auth_reply_buf); | |
4e7a5dcd SW |
1665 | if (ret <= 0) |
1666 | goto out; | |
31b8006e | 1667 | |
4e7a5dcd SW |
1668 | dout("read_partial_connect %p tag %d, con_seq = %u, g_seq = %u\n", |
1669 | con, (int)con->in_reply.tag, | |
1670 | le32_to_cpu(con->in_reply.connect_seq), | |
31b8006e SW |
1671 | le32_to_cpu(con->in_reply.global_seq)); |
1672 | out: | |
1673 | return ret; | |
eed0ef2c | 1674 | |
31b8006e SW |
1675 | } |
1676 | ||
1677 | /* | |
1678 | * Verify the hello banner looks okay. | |
1679 | */ | |
1680 | static int verify_hello(struct ceph_connection *con) | |
1681 | { | |
1682 | if (memcmp(con->in_banner, CEPH_BANNER, strlen(CEPH_BANNER))) { | |
13e38c8a | 1683 | pr_err("connect to %s got bad banner\n", |
3d14c5d2 | 1684 | ceph_pr_addr(&con->peer_addr.in_addr)); |
31b8006e SW |
1685 | con->error_msg = "protocol error, bad banner"; |
1686 | return -1; | |
1687 | } | |
1688 | return 0; | |
1689 | } | |
1690 | ||
1691 | static bool addr_is_blank(struct sockaddr_storage *ss) | |
1692 | { | |
1693 | switch (ss->ss_family) { | |
1694 | case AF_INET: | |
1695 | return ((struct sockaddr_in *)ss)->sin_addr.s_addr == 0; | |
1696 | case AF_INET6: | |
1697 | return | |
1698 | ((struct sockaddr_in6 *)ss)->sin6_addr.s6_addr32[0] == 0 && | |
1699 | ((struct sockaddr_in6 *)ss)->sin6_addr.s6_addr32[1] == 0 && | |
1700 | ((struct sockaddr_in6 *)ss)->sin6_addr.s6_addr32[2] == 0 && | |
1701 | ((struct sockaddr_in6 *)ss)->sin6_addr.s6_addr32[3] == 0; | |
1702 | } | |
1703 | return false; | |
1704 | } | |
1705 | ||
1706 | static int addr_port(struct sockaddr_storage *ss) | |
1707 | { | |
1708 | switch (ss->ss_family) { | |
1709 | case AF_INET: | |
f28bcfbe | 1710 | return ntohs(((struct sockaddr_in *)ss)->sin_port); |
31b8006e | 1711 | case AF_INET6: |
f28bcfbe | 1712 | return ntohs(((struct sockaddr_in6 *)ss)->sin6_port); |
31b8006e SW |
1713 | } |
1714 | return 0; | |
1715 | } | |
1716 | ||
1717 | static void addr_set_port(struct sockaddr_storage *ss, int p) | |
1718 | { | |
1719 | switch (ss->ss_family) { | |
1720 | case AF_INET: | |
1721 | ((struct sockaddr_in *)ss)->sin_port = htons(p); | |
a2a79609 | 1722 | break; |
31b8006e SW |
1723 | case AF_INET6: |
1724 | ((struct sockaddr_in6 *)ss)->sin6_port = htons(p); | |
a2a79609 | 1725 | break; |
31b8006e SW |
1726 | } |
1727 | } | |
1728 | ||
ee3b56f2 NW |
1729 | /* |
1730 | * Unlike other *_pton function semantics, zero indicates success. | |
1731 | */ | |
1732 | static int ceph_pton(const char *str, size_t len, struct sockaddr_storage *ss, | |
1733 | char delim, const char **ipend) | |
1734 | { | |
99f0f3b2 AE |
1735 | struct sockaddr_in *in4 = (struct sockaddr_in *) ss; |
1736 | struct sockaddr_in6 *in6 = (struct sockaddr_in6 *) ss; | |
ee3b56f2 NW |
1737 | |
1738 | memset(ss, 0, sizeof(*ss)); | |
1739 | ||
1740 | if (in4_pton(str, len, (u8 *)&in4->sin_addr.s_addr, delim, ipend)) { | |
1741 | ss->ss_family = AF_INET; | |
1742 | return 0; | |
1743 | } | |
1744 | ||
1745 | if (in6_pton(str, len, (u8 *)&in6->sin6_addr.s6_addr, delim, ipend)) { | |
1746 | ss->ss_family = AF_INET6; | |
1747 | return 0; | |
1748 | } | |
1749 | ||
1750 | return -EINVAL; | |
1751 | } | |
1752 | ||
1753 | /* | |
1754 | * Extract hostname string and resolve using kernel DNS facility. | |
1755 | */ | |
1756 | #ifdef CONFIG_CEPH_LIB_USE_DNS_RESOLVER | |
1757 | static int ceph_dns_resolve_name(const char *name, size_t namelen, | |
1758 | struct sockaddr_storage *ss, char delim, const char **ipend) | |
1759 | { | |
1760 | const char *end, *delim_p; | |
1761 | char *colon_p, *ip_addr = NULL; | |
1762 | int ip_len, ret; | |
1763 | ||
1764 | /* | |
1765 | * The end of the hostname occurs immediately preceding the delimiter or | |
1766 | * the port marker (':') where the delimiter takes precedence. | |
1767 | */ | |
1768 | delim_p = memchr(name, delim, namelen); | |
1769 | colon_p = memchr(name, ':', namelen); | |
1770 | ||
1771 | if (delim_p && colon_p) | |
1772 | end = delim_p < colon_p ? delim_p : colon_p; | |
1773 | else if (!delim_p && colon_p) | |
1774 | end = colon_p; | |
1775 | else { | |
1776 | end = delim_p; | |
1777 | if (!end) /* case: hostname:/ */ | |
1778 | end = name + namelen; | |
1779 | } | |
1780 | ||
1781 | if (end <= name) | |
1782 | return -EINVAL; | |
1783 | ||
1784 | /* do dns_resolve upcall */ | |
1785 | ip_len = dns_query(NULL, name, end - name, NULL, &ip_addr, NULL); | |
1786 | if (ip_len > 0) | |
1787 | ret = ceph_pton(ip_addr, ip_len, ss, -1, NULL); | |
1788 | else | |
1789 | ret = -ESRCH; | |
1790 | ||
1791 | kfree(ip_addr); | |
1792 | ||
1793 | *ipend = end; | |
1794 | ||
1795 | pr_info("resolve '%.*s' (ret=%d): %s\n", (int)(end - name), name, | |
1796 | ret, ret ? "failed" : ceph_pr_addr(ss)); | |
1797 | ||
1798 | return ret; | |
1799 | } | |
1800 | #else | |
1801 | static inline int ceph_dns_resolve_name(const char *name, size_t namelen, | |
1802 | struct sockaddr_storage *ss, char delim, const char **ipend) | |
1803 | { | |
1804 | return -EINVAL; | |
1805 | } | |
1806 | #endif | |
1807 | ||
1808 | /* | |
1809 | * Parse a server name (IP or hostname). If a valid IP address is not found | |
1810 | * then try to extract a hostname to resolve using userspace DNS upcall. | |
1811 | */ | |
1812 | static int ceph_parse_server_name(const char *name, size_t namelen, | |
1813 | struct sockaddr_storage *ss, char delim, const char **ipend) | |
1814 | { | |
1815 | int ret; | |
1816 | ||
1817 | ret = ceph_pton(name, namelen, ss, delim, ipend); | |
1818 | if (ret) | |
1819 | ret = ceph_dns_resolve_name(name, namelen, ss, delim, ipend); | |
1820 | ||
1821 | return ret; | |
1822 | } | |
1823 | ||
31b8006e SW |
1824 | /* |
1825 | * Parse an ip[:port] list into an addr array. Use the default | |
1826 | * monitor port if a port isn't specified. | |
1827 | */ | |
1828 | int ceph_parse_ips(const char *c, const char *end, | |
1829 | struct ceph_entity_addr *addr, | |
1830 | int max_count, int *count) | |
1831 | { | |
ee3b56f2 | 1832 | int i, ret = -EINVAL; |
31b8006e SW |
1833 | const char *p = c; |
1834 | ||
1835 | dout("parse_ips on '%.*s'\n", (int)(end-c), c); | |
1836 | for (i = 0; i < max_count; i++) { | |
1837 | const char *ipend; | |
1838 | struct sockaddr_storage *ss = &addr[i].in_addr; | |
31b8006e | 1839 | int port; |
39139f64 SW |
1840 | char delim = ','; |
1841 | ||
1842 | if (*p == '[') { | |
1843 | delim = ']'; | |
1844 | p++; | |
1845 | } | |
31b8006e | 1846 | |
ee3b56f2 NW |
1847 | ret = ceph_parse_server_name(p, end - p, ss, delim, &ipend); |
1848 | if (ret) | |
31b8006e | 1849 | goto bad; |
ee3b56f2 NW |
1850 | ret = -EINVAL; |
1851 | ||
31b8006e SW |
1852 | p = ipend; |
1853 | ||
39139f64 SW |
1854 | if (delim == ']') { |
1855 | if (*p != ']') { | |
1856 | dout("missing matching ']'\n"); | |
1857 | goto bad; | |
1858 | } | |
1859 | p++; | |
1860 | } | |
1861 | ||
31b8006e SW |
1862 | /* port? */ |
1863 | if (p < end && *p == ':') { | |
1864 | port = 0; | |
1865 | p++; | |
1866 | while (p < end && *p >= '0' && *p <= '9') { | |
1867 | port = (port * 10) + (*p - '0'); | |
1868 | p++; | |
1869 | } | |
f48db1e9 ID |
1870 | if (port == 0) |
1871 | port = CEPH_MON_PORT; | |
1872 | else if (port > 65535) | |
31b8006e SW |
1873 | goto bad; |
1874 | } else { | |
1875 | port = CEPH_MON_PORT; | |
1876 | } | |
1877 | ||
1878 | addr_set_port(ss, port); | |
1879 | ||
3d14c5d2 | 1880 | dout("parse_ips got %s\n", ceph_pr_addr(ss)); |
31b8006e SW |
1881 | |
1882 | if (p == end) | |
1883 | break; | |
1884 | if (*p != ',') | |
1885 | goto bad; | |
1886 | p++; | |
1887 | } | |
1888 | ||
1889 | if (p != end) | |
1890 | goto bad; | |
1891 | ||
1892 | if (count) | |
1893 | *count = i + 1; | |
1894 | return 0; | |
1895 | ||
1896 | bad: | |
39139f64 | 1897 | pr_err("parse_ips bad ip '%.*s'\n", (int)(end - c), c); |
ee3b56f2 | 1898 | return ret; |
31b8006e | 1899 | } |
3d14c5d2 | 1900 | EXPORT_SYMBOL(ceph_parse_ips); |
31b8006e | 1901 | |
eed0ef2c | 1902 | static int process_banner(struct ceph_connection *con) |
31b8006e | 1903 | { |
eed0ef2c | 1904 | dout("process_banner on %p\n", con); |
31b8006e SW |
1905 | |
1906 | if (verify_hello(con) < 0) | |
1907 | return -1; | |
1908 | ||
63f2d211 SW |
1909 | ceph_decode_addr(&con->actual_peer_addr); |
1910 | ceph_decode_addr(&con->peer_addr_for_me); | |
1911 | ||
31b8006e SW |
1912 | /* |
1913 | * Make sure the other end is who we wanted. note that the other | |
1914 | * end may not yet know their ip address, so if it's 0.0.0.0, give | |
1915 | * them the benefit of the doubt. | |
1916 | */ | |
103e2d3a SW |
1917 | if (memcmp(&con->peer_addr, &con->actual_peer_addr, |
1918 | sizeof(con->peer_addr)) != 0 && | |
31b8006e SW |
1919 | !(addr_is_blank(&con->actual_peer_addr.in_addr) && |
1920 | con->actual_peer_addr.nonce == con->peer_addr.nonce)) { | |
cd84db6e | 1921 | pr_warning("wrong peer, want %s/%d, got %s/%d\n", |
3d14c5d2 | 1922 | ceph_pr_addr(&con->peer_addr.in_addr), |
cd84db6e | 1923 | (int)le32_to_cpu(con->peer_addr.nonce), |
3d14c5d2 | 1924 | ceph_pr_addr(&con->actual_peer_addr.in_addr), |
cd84db6e | 1925 | (int)le32_to_cpu(con->actual_peer_addr.nonce)); |
58bb3b37 | 1926 | con->error_msg = "wrong peer at address"; |
31b8006e SW |
1927 | return -1; |
1928 | } | |
1929 | ||
1930 | /* | |
1931 | * did we learn our address? | |
1932 | */ | |
1933 | if (addr_is_blank(&con->msgr->inst.addr.in_addr)) { | |
1934 | int port = addr_port(&con->msgr->inst.addr.in_addr); | |
1935 | ||
1936 | memcpy(&con->msgr->inst.addr.in_addr, | |
1937 | &con->peer_addr_for_me.in_addr, | |
1938 | sizeof(con->peer_addr_for_me.in_addr)); | |
1939 | addr_set_port(&con->msgr->inst.addr.in_addr, port); | |
63f2d211 | 1940 | encode_my_addr(con->msgr); |
eed0ef2c | 1941 | dout("process_banner learned my addr is %s\n", |
3d14c5d2 | 1942 | ceph_pr_addr(&con->msgr->inst.addr.in_addr)); |
31b8006e SW |
1943 | } |
1944 | ||
eed0ef2c SW |
1945 | return 0; |
1946 | } | |
1947 | ||
1948 | static int process_connect(struct ceph_connection *con) | |
1949 | { | |
3d14c5d2 YS |
1950 | u64 sup_feat = con->msgr->supported_features; |
1951 | u64 req_feat = con->msgr->required_features; | |
2b3e0c90 ID |
1952 | u64 server_feat = ceph_sanitize_features( |
1953 | le64_to_cpu(con->in_reply.features)); | |
0da5d703 | 1954 | int ret; |
04a419f9 | 1955 | |
eed0ef2c SW |
1956 | dout("process_connect on %p tag %d\n", con, (int)con->in_tag); |
1957 | ||
31b8006e | 1958 | switch (con->in_reply.tag) { |
04a419f9 SW |
1959 | case CEPH_MSGR_TAG_FEATURES: |
1960 | pr_err("%s%lld %s feature set mismatch," | |
1961 | " my %llx < server's %llx, missing %llx\n", | |
1962 | ENTITY_NAME(con->peer_name), | |
3d14c5d2 | 1963 | ceph_pr_addr(&con->peer_addr.in_addr), |
04a419f9 SW |
1964 | sup_feat, server_feat, server_feat & ~sup_feat); |
1965 | con->error_msg = "missing required protocol features"; | |
0fa6ebc6 | 1966 | reset_connection(con); |
04a419f9 SW |
1967 | return -1; |
1968 | ||
31b8006e | 1969 | case CEPH_MSGR_TAG_BADPROTOVER: |
31b8006e SW |
1970 | pr_err("%s%lld %s protocol version mismatch," |
1971 | " my %d != server's %d\n", | |
1972 | ENTITY_NAME(con->peer_name), | |
3d14c5d2 | 1973 | ceph_pr_addr(&con->peer_addr.in_addr), |
31b8006e SW |
1974 | le32_to_cpu(con->out_connect.protocol_version), |
1975 | le32_to_cpu(con->in_reply.protocol_version)); | |
1976 | con->error_msg = "protocol version mismatch"; | |
0fa6ebc6 | 1977 | reset_connection(con); |
31b8006e SW |
1978 | return -1; |
1979 | ||
4e7a5dcd SW |
1980 | case CEPH_MSGR_TAG_BADAUTHORIZER: |
1981 | con->auth_retry++; | |
1982 | dout("process_connect %p got BADAUTHORIZER attempt %d\n", con, | |
1983 | con->auth_retry); | |
1984 | if (con->auth_retry == 2) { | |
1985 | con->error_msg = "connect authorization failure"; | |
4e7a5dcd SW |
1986 | return -1; |
1987 | } | |
6d4221b5 | 1988 | con_out_kvec_reset(con); |
e825a66d | 1989 | ret = prepare_write_connect(con); |
0da5d703 SW |
1990 | if (ret < 0) |
1991 | return ret; | |
63733a0f | 1992 | prepare_read_connect(con); |
4e7a5dcd | 1993 | break; |
31b8006e SW |
1994 | |
1995 | case CEPH_MSGR_TAG_RESETSESSION: | |
1996 | /* | |
1997 | * If we connected with a large connect_seq but the peer | |
1998 | * has no record of a session with us (no connection, or | |
1999 | * connect_seq == 0), they will send RESETSESION to indicate | |
2000 | * that they must have reset their session, and may have | |
2001 | * dropped messages. | |
2002 | */ | |
2003 | dout("process_connect got RESET peer seq %u\n", | |
5bdca4e0 | 2004 | le32_to_cpu(con->in_reply.connect_seq)); |
31b8006e SW |
2005 | pr_err("%s%lld %s connection reset\n", |
2006 | ENTITY_NAME(con->peer_name), | |
3d14c5d2 | 2007 | ceph_pr_addr(&con->peer_addr.in_addr)); |
31b8006e | 2008 | reset_connection(con); |
6d4221b5 | 2009 | con_out_kvec_reset(con); |
5a0f8fdd AE |
2010 | ret = prepare_write_connect(con); |
2011 | if (ret < 0) | |
2012 | return ret; | |
31b8006e SW |
2013 | prepare_read_connect(con); |
2014 | ||
2015 | /* Tell ceph about it. */ | |
ec302645 | 2016 | mutex_unlock(&con->mutex); |
31b8006e SW |
2017 | pr_info("reset on %s%lld\n", ENTITY_NAME(con->peer_name)); |
2018 | if (con->ops->peer_reset) | |
2019 | con->ops->peer_reset(con); | |
ec302645 | 2020 | mutex_lock(&con->mutex); |
8dacc7da | 2021 | if (con->state != CON_STATE_NEGOTIATING) |
0da5d703 | 2022 | return -EAGAIN; |
31b8006e SW |
2023 | break; |
2024 | ||
2025 | case CEPH_MSGR_TAG_RETRY_SESSION: | |
2026 | /* | |
2027 | * If we sent a smaller connect_seq than the peer has, try | |
2028 | * again with a larger value. | |
2029 | */ | |
5bdca4e0 | 2030 | dout("process_connect got RETRY_SESSION my seq %u, peer %u\n", |
31b8006e | 2031 | le32_to_cpu(con->out_connect.connect_seq), |
5bdca4e0 SW |
2032 | le32_to_cpu(con->in_reply.connect_seq)); |
2033 | con->connect_seq = le32_to_cpu(con->in_reply.connect_seq); | |
6d4221b5 | 2034 | con_out_kvec_reset(con); |
5a0f8fdd AE |
2035 | ret = prepare_write_connect(con); |
2036 | if (ret < 0) | |
2037 | return ret; | |
31b8006e SW |
2038 | prepare_read_connect(con); |
2039 | break; | |
2040 | ||
2041 | case CEPH_MSGR_TAG_RETRY_GLOBAL: | |
2042 | /* | |
2043 | * If we sent a smaller global_seq than the peer has, try | |
2044 | * again with a larger value. | |
2045 | */ | |
eed0ef2c | 2046 | dout("process_connect got RETRY_GLOBAL my %u peer_gseq %u\n", |
31b8006e | 2047 | con->peer_global_seq, |
5bdca4e0 | 2048 | le32_to_cpu(con->in_reply.global_seq)); |
31b8006e | 2049 | get_global_seq(con->msgr, |
5bdca4e0 | 2050 | le32_to_cpu(con->in_reply.global_seq)); |
6d4221b5 | 2051 | con_out_kvec_reset(con); |
5a0f8fdd AE |
2052 | ret = prepare_write_connect(con); |
2053 | if (ret < 0) | |
2054 | return ret; | |
31b8006e SW |
2055 | prepare_read_connect(con); |
2056 | break; | |
2057 | ||
3a23083b | 2058 | case CEPH_MSGR_TAG_SEQ: |
31b8006e | 2059 | case CEPH_MSGR_TAG_READY: |
04a419f9 SW |
2060 | if (req_feat & ~server_feat) { |
2061 | pr_err("%s%lld %s protocol feature mismatch," | |
2062 | " my required %llx > server's %llx, need %llx\n", | |
2063 | ENTITY_NAME(con->peer_name), | |
3d14c5d2 | 2064 | ceph_pr_addr(&con->peer_addr.in_addr), |
04a419f9 SW |
2065 | req_feat, server_feat, req_feat & ~server_feat); |
2066 | con->error_msg = "missing required protocol features"; | |
0fa6ebc6 | 2067 | reset_connection(con); |
04a419f9 SW |
2068 | return -1; |
2069 | } | |
8dacc7da | 2070 | |
122070a2 | 2071 | WARN_ON(con->state != CON_STATE_NEGOTIATING); |
8dacc7da | 2072 | con->state = CON_STATE_OPEN; |
20e55c4c | 2073 | con->auth_retry = 0; /* we authenticated; clear flag */ |
31b8006e SW |
2074 | con->peer_global_seq = le32_to_cpu(con->in_reply.global_seq); |
2075 | con->connect_seq++; | |
aba558e2 | 2076 | con->peer_features = server_feat; |
31b8006e SW |
2077 | dout("process_connect got READY gseq %d cseq %d (%d)\n", |
2078 | con->peer_global_seq, | |
2079 | le32_to_cpu(con->in_reply.connect_seq), | |
2080 | con->connect_seq); | |
2081 | WARN_ON(con->connect_seq != | |
2082 | le32_to_cpu(con->in_reply.connect_seq)); | |
92ac41d0 SW |
2083 | |
2084 | if (con->in_reply.flags & CEPH_MSG_CONNECT_LOSSY) | |
c9ffc77a | 2085 | con_flag_set(con, CON_FLAG_LOSSYTX); |
92ac41d0 | 2086 | |
85effe18 | 2087 | con->delay = 0; /* reset backoff memory */ |
92ac41d0 | 2088 | |
3a23083b SW |
2089 | if (con->in_reply.tag == CEPH_MSGR_TAG_SEQ) { |
2090 | prepare_write_seq(con); | |
2091 | prepare_read_seq(con); | |
2092 | } else { | |
2093 | prepare_read_tag(con); | |
2094 | } | |
31b8006e SW |
2095 | break; |
2096 | ||
2097 | case CEPH_MSGR_TAG_WAIT: | |
2098 | /* | |
2099 | * If there is a connection race (we are opening | |
2100 | * connections to each other), one of us may just have | |
2101 | * to WAIT. This shouldn't happen if we are the | |
2102 | * client. | |
2103 | */ | |
04177882 SW |
2104 | pr_err("process_connect got WAIT as client\n"); |
2105 | con->error_msg = "protocol error, got WAIT as client"; | |
2106 | return -1; | |
31b8006e SW |
2107 | |
2108 | default: | |
2109 | pr_err("connect protocol error, will retry\n"); | |
2110 | con->error_msg = "protocol error, garbage tag during connect"; | |
2111 | return -1; | |
2112 | } | |
2113 | return 0; | |
2114 | } | |
2115 | ||
2116 | ||
2117 | /* | |
2118 | * read (part of) an ack | |
2119 | */ | |
2120 | static int read_partial_ack(struct ceph_connection *con) | |
2121 | { | |
fd51653f AE |
2122 | int size = sizeof (con->in_temp_ack); |
2123 | int end = size; | |
31b8006e | 2124 | |
fd51653f | 2125 | return read_partial(con, end, size, &con->in_temp_ack); |
31b8006e SW |
2126 | } |
2127 | ||
31b8006e SW |
2128 | /* |
2129 | * We can finally discard anything that's been acked. | |
2130 | */ | |
2131 | static void process_ack(struct ceph_connection *con) | |
2132 | { | |
2133 | struct ceph_msg *m; | |
2134 | u64 ack = le64_to_cpu(con->in_temp_ack); | |
2135 | u64 seq; | |
2136 | ||
31b8006e SW |
2137 | while (!list_empty(&con->out_sent)) { |
2138 | m = list_first_entry(&con->out_sent, struct ceph_msg, | |
2139 | list_head); | |
2140 | seq = le64_to_cpu(m->hdr.seq); | |
2141 | if (seq > ack) | |
2142 | break; | |
2143 | dout("got ack for seq %llu type %d at %p\n", seq, | |
2144 | le16_to_cpu(m->hdr.type), m); | |
4cf9d544 | 2145 | m->ack_stamp = jiffies; |
31b8006e SW |
2146 | ceph_msg_remove(m); |
2147 | } | |
31b8006e SW |
2148 | prepare_read_tag(con); |
2149 | } | |
2150 | ||
2151 | ||
2450418c | 2152 | static int read_partial_message_section(struct ceph_connection *con, |
213c99ee SW |
2153 | struct kvec *section, |
2154 | unsigned int sec_len, u32 *crc) | |
2450418c | 2155 | { |
68b4476b | 2156 | int ret, left; |
2450418c YS |
2157 | |
2158 | BUG_ON(!section); | |
2159 | ||
2160 | while (section->iov_len < sec_len) { | |
2161 | BUG_ON(section->iov_base == NULL); | |
2162 | left = sec_len - section->iov_len; | |
2163 | ret = ceph_tcp_recvmsg(con->sock, (char *)section->iov_base + | |
2164 | section->iov_len, left); | |
2165 | if (ret <= 0) | |
2166 | return ret; | |
2167 | section->iov_len += ret; | |
2450418c | 2168 | } |
fe3ad593 AE |
2169 | if (section->iov_len == sec_len) |
2170 | *crc = crc32c(0, section->iov_base, section->iov_len); | |
31b8006e | 2171 | |
2450418c YS |
2172 | return 1; |
2173 | } | |
31b8006e | 2174 | |
34d2d200 AE |
2175 | static int read_partial_msg_data(struct ceph_connection *con) |
2176 | { | |
2177 | struct ceph_msg *msg = con->in_msg; | |
8ae4f4f5 | 2178 | struct ceph_msg_data_cursor *cursor = &msg->cursor; |
34d2d200 | 2179 | const bool do_datacrc = !con->msgr->nocrc; |
686be208 AE |
2180 | struct page *page; |
2181 | size_t page_offset; | |
2182 | size_t length; | |
f5db90bc | 2183 | u32 crc = 0; |
34d2d200 AE |
2184 | int ret; |
2185 | ||
2186 | BUG_ON(!msg); | |
5240d9f9 | 2187 | if (list_empty(&msg->data)) |
4c59b4a2 | 2188 | return -EIO; |
34d2d200 | 2189 | |
f5db90bc AE |
2190 | if (do_datacrc) |
2191 | crc = con->in_data_crc; | |
643c68a4 | 2192 | while (cursor->resid) { |
8ae4f4f5 | 2193 | page = ceph_msg_data_next(&msg->cursor, &page_offset, &length, |
4c59b4a2 | 2194 | NULL); |
686be208 | 2195 | ret = ceph_tcp_recvpage(con->sock, page, page_offset, length); |
f5db90bc AE |
2196 | if (ret <= 0) { |
2197 | if (do_datacrc) | |
2198 | con->in_data_crc = crc; | |
2199 | ||
686be208 | 2200 | return ret; |
f5db90bc | 2201 | } |
686be208 AE |
2202 | |
2203 | if (do_datacrc) | |
f5db90bc | 2204 | crc = ceph_crc32c_page(crc, page, page_offset, ret); |
8ae4f4f5 | 2205 | (void) ceph_msg_data_advance(&msg->cursor, (size_t)ret); |
34d2d200 | 2206 | } |
f5db90bc AE |
2207 | if (do_datacrc) |
2208 | con->in_data_crc = crc; | |
34d2d200 AE |
2209 | |
2210 | return 1; /* must return > 0 to indicate success */ | |
2211 | } | |
2212 | ||
31b8006e SW |
2213 | /* |
2214 | * read (part of) a message. | |
2215 | */ | |
686be208 AE |
2216 | static int ceph_con_in_msg_alloc(struct ceph_connection *con, int *skip); |
2217 | ||
31b8006e SW |
2218 | static int read_partial_message(struct ceph_connection *con) |
2219 | { | |
2220 | struct ceph_msg *m = con->in_msg; | |
fd51653f AE |
2221 | int size; |
2222 | int end; | |
31b8006e | 2223 | int ret; |
95c96174 | 2224 | unsigned int front_len, middle_len, data_len; |
37675b0f | 2225 | bool do_datacrc = !con->msgr->nocrc; |
ae18756b | 2226 | u64 seq; |
fe3ad593 | 2227 | u32 crc; |
31b8006e SW |
2228 | |
2229 | dout("read_partial_message con %p msg %p\n", con, m); | |
2230 | ||
2231 | /* header */ | |
fd51653f AE |
2232 | size = sizeof (con->in_hdr); |
2233 | end = size; | |
2234 | ret = read_partial(con, end, size, &con->in_hdr); | |
57dac9d1 AE |
2235 | if (ret <= 0) |
2236 | return ret; | |
fe3ad593 AE |
2237 | |
2238 | crc = crc32c(0, &con->in_hdr, offsetof(struct ceph_msg_header, crc)); | |
2239 | if (cpu_to_le32(crc) != con->in_hdr.crc) { | |
2240 | pr_err("read_partial_message bad hdr " | |
2241 | " crc %u != expected %u\n", | |
2242 | crc, con->in_hdr.crc); | |
2243 | return -EBADMSG; | |
2244 | } | |
2245 | ||
31b8006e SW |
2246 | front_len = le32_to_cpu(con->in_hdr.front_len); |
2247 | if (front_len > CEPH_MSG_MAX_FRONT_LEN) | |
2248 | return -EIO; | |
2249 | middle_len = le32_to_cpu(con->in_hdr.middle_len); | |
7b11ba37 | 2250 | if (middle_len > CEPH_MSG_MAX_MIDDLE_LEN) |
31b8006e SW |
2251 | return -EIO; |
2252 | data_len = le32_to_cpu(con->in_hdr.data_len); | |
2253 | if (data_len > CEPH_MSG_MAX_DATA_LEN) | |
2254 | return -EIO; | |
2255 | ||
ae18756b SW |
2256 | /* verify seq# */ |
2257 | seq = le64_to_cpu(con->in_hdr.seq); | |
2258 | if ((s64)seq - (s64)con->in_seq < 1) { | |
df9f86fa | 2259 | pr_info("skipping %s%lld %s seq %lld expected %lld\n", |
ae18756b | 2260 | ENTITY_NAME(con->peer_name), |
3d14c5d2 | 2261 | ceph_pr_addr(&con->peer_addr.in_addr), |
ae18756b SW |
2262 | seq, con->in_seq + 1); |
2263 | con->in_base_pos = -front_len - middle_len - data_len - | |
2264 | sizeof(m->footer); | |
2265 | con->in_tag = CEPH_MSGR_TAG_READY; | |
ae18756b SW |
2266 | return 0; |
2267 | } else if ((s64)seq - (s64)con->in_seq > 1) { | |
2268 | pr_err("read_partial_message bad seq %lld expected %lld\n", | |
2269 | seq, con->in_seq + 1); | |
2270 | con->error_msg = "bad message sequence # for incoming message"; | |
2271 | return -EBADMSG; | |
2272 | } | |
2273 | ||
31b8006e SW |
2274 | /* allocate message? */ |
2275 | if (!con->in_msg) { | |
4740a623 SW |
2276 | int skip = 0; |
2277 | ||
31b8006e | 2278 | dout("got hdr type %d front %d data %d\n", con->in_hdr.type, |
6ebc8b32 | 2279 | front_len, data_len); |
4740a623 SW |
2280 | ret = ceph_con_in_msg_alloc(con, &skip); |
2281 | if (ret < 0) | |
2282 | return ret; | |
f759ebb9 AE |
2283 | |
2284 | BUG_ON(!con->in_msg ^ skip); | |
2285 | if (con->in_msg && data_len > con->in_msg->data_length) { | |
2286 | pr_warning("%s skipping long message (%u > %zd)\n", | |
2287 | __func__, data_len, con->in_msg->data_length); | |
2288 | ceph_msg_put(con->in_msg); | |
2289 | con->in_msg = NULL; | |
2290 | skip = 1; | |
2291 | } | |
2450418c | 2292 | if (skip) { |
31b8006e | 2293 | /* skip this message */ |
a79832f2 | 2294 | dout("alloc_msg said skip message\n"); |
31b8006e SW |
2295 | con->in_base_pos = -front_len - middle_len - data_len - |
2296 | sizeof(m->footer); | |
2297 | con->in_tag = CEPH_MSGR_TAG_READY; | |
684be25c | 2298 | con->in_seq++; |
31b8006e SW |
2299 | return 0; |
2300 | } | |
38941f80 | 2301 | |
4740a623 | 2302 | BUG_ON(!con->in_msg); |
38941f80 | 2303 | BUG_ON(con->in_msg->con != con); |
31b8006e SW |
2304 | m = con->in_msg; |
2305 | m->front.iov_len = 0; /* haven't read it yet */ | |
2450418c YS |
2306 | if (m->middle) |
2307 | m->middle->vec.iov_len = 0; | |
9d7f0f13 | 2308 | |
78625051 | 2309 | /* prepare for data payload, if any */ |
a4107026 | 2310 | |
78625051 | 2311 | if (data_len) |
98fa5dd8 | 2312 | prepare_message_data(con->in_msg, data_len); |
31b8006e SW |
2313 | } |
2314 | ||
2315 | /* front */ | |
2450418c YS |
2316 | ret = read_partial_message_section(con, &m->front, front_len, |
2317 | &con->in_front_crc); | |
2318 | if (ret <= 0) | |
2319 | return ret; | |
31b8006e SW |
2320 | |
2321 | /* middle */ | |
2450418c | 2322 | if (m->middle) { |
213c99ee SW |
2323 | ret = read_partial_message_section(con, &m->middle->vec, |
2324 | middle_len, | |
2450418c | 2325 | &con->in_middle_crc); |
31b8006e SW |
2326 | if (ret <= 0) |
2327 | return ret; | |
31b8006e SW |
2328 | } |
2329 | ||
2330 | /* (page) data */ | |
34d2d200 AE |
2331 | if (data_len) { |
2332 | ret = read_partial_msg_data(con); | |
2333 | if (ret <= 0) | |
2334 | return ret; | |
31b8006e SW |
2335 | } |
2336 | ||
31b8006e | 2337 | /* footer */ |
fd51653f AE |
2338 | size = sizeof (m->footer); |
2339 | end += size; | |
2340 | ret = read_partial(con, end, size, &m->footer); | |
57dac9d1 AE |
2341 | if (ret <= 0) |
2342 | return ret; | |
2343 | ||
31b8006e SW |
2344 | dout("read_partial_message got msg %p %d (%u) + %d (%u) + %d (%u)\n", |
2345 | m, front_len, m->footer.front_crc, middle_len, | |
2346 | m->footer.middle_crc, data_len, m->footer.data_crc); | |
2347 | ||
2348 | /* crc ok? */ | |
2349 | if (con->in_front_crc != le32_to_cpu(m->footer.front_crc)) { | |
2350 | pr_err("read_partial_message %p front crc %u != exp. %u\n", | |
2351 | m, con->in_front_crc, m->footer.front_crc); | |
2352 | return -EBADMSG; | |
2353 | } | |
2354 | if (con->in_middle_crc != le32_to_cpu(m->footer.middle_crc)) { | |
2355 | pr_err("read_partial_message %p middle crc %u != exp %u\n", | |
2356 | m, con->in_middle_crc, m->footer.middle_crc); | |
2357 | return -EBADMSG; | |
2358 | } | |
bca064d2 | 2359 | if (do_datacrc && |
31b8006e SW |
2360 | (m->footer.flags & CEPH_MSG_FOOTER_NOCRC) == 0 && |
2361 | con->in_data_crc != le32_to_cpu(m->footer.data_crc)) { | |
2362 | pr_err("read_partial_message %p data crc %u != exp. %u\n", m, | |
2363 | con->in_data_crc, le32_to_cpu(m->footer.data_crc)); | |
2364 | return -EBADMSG; | |
2365 | } | |
2366 | ||
2367 | return 1; /* done! */ | |
2368 | } | |
2369 | ||
2370 | /* | |
2371 | * Process message. This happens in the worker thread. The callback should | |
2372 | * be careful not to do anything that waits on other incoming messages or it | |
2373 | * may deadlock. | |
2374 | */ | |
2375 | static void process_message(struct ceph_connection *con) | |
2376 | { | |
5e095e8b | 2377 | struct ceph_msg *msg; |
31b8006e | 2378 | |
38941f80 AE |
2379 | BUG_ON(con->in_msg->con != con); |
2380 | con->in_msg->con = NULL; | |
5e095e8b | 2381 | msg = con->in_msg; |
31b8006e | 2382 | con->in_msg = NULL; |
36eb71aa | 2383 | con->ops->put(con); |
31b8006e SW |
2384 | |
2385 | /* if first message, set peer_name */ | |
2386 | if (con->peer_name.type == 0) | |
dbad185d | 2387 | con->peer_name = msg->hdr.src; |
31b8006e | 2388 | |
31b8006e | 2389 | con->in_seq++; |
ec302645 | 2390 | mutex_unlock(&con->mutex); |
31b8006e SW |
2391 | |
2392 | dout("===== %p %llu from %s%lld %d=%s len %d+%d (%u %u %u) =====\n", | |
2393 | msg, le64_to_cpu(msg->hdr.seq), | |
dbad185d | 2394 | ENTITY_NAME(msg->hdr.src), |
31b8006e SW |
2395 | le16_to_cpu(msg->hdr.type), |
2396 | ceph_msg_type_name(le16_to_cpu(msg->hdr.type)), | |
2397 | le32_to_cpu(msg->hdr.front_len), | |
2398 | le32_to_cpu(msg->hdr.data_len), | |
2399 | con->in_front_crc, con->in_middle_crc, con->in_data_crc); | |
2400 | con->ops->dispatch(con, msg); | |
ec302645 SW |
2401 | |
2402 | mutex_lock(&con->mutex); | |
31b8006e SW |
2403 | } |
2404 | ||
2405 | ||
2406 | /* | |
2407 | * Write something to the socket. Called in a worker thread when the | |
2408 | * socket appears to be writeable and we have something ready to send. | |
2409 | */ | |
2410 | static int try_write(struct ceph_connection *con) | |
2411 | { | |
31b8006e SW |
2412 | int ret = 1; |
2413 | ||
d59315ca | 2414 | dout("try_write start %p state %lu\n", con, con->state); |
31b8006e | 2415 | |
31b8006e SW |
2416 | more: |
2417 | dout("try_write out_kvec_bytes %d\n", con->out_kvec_bytes); | |
2418 | ||
2419 | /* open the socket first? */ | |
8dacc7da SW |
2420 | if (con->state == CON_STATE_PREOPEN) { |
2421 | BUG_ON(con->sock); | |
2422 | con->state = CON_STATE_CONNECTING; | |
a5988c49 | 2423 | |
e2200423 | 2424 | con_out_kvec_reset(con); |
e825a66d | 2425 | prepare_write_banner(con); |
eed0ef2c | 2426 | prepare_read_banner(con); |
31b8006e | 2427 | |
cf3e5c40 | 2428 | BUG_ON(con->in_msg); |
31b8006e SW |
2429 | con->in_tag = CEPH_MSGR_TAG_READY; |
2430 | dout("try_write initiating connect on %p new state %lu\n", | |
2431 | con, con->state); | |
41617d0c AE |
2432 | ret = ceph_tcp_connect(con); |
2433 | if (ret < 0) { | |
31b8006e | 2434 | con->error_msg = "connect error"; |
31b8006e SW |
2435 | goto out; |
2436 | } | |
2437 | } | |
2438 | ||
2439 | more_kvec: | |
2440 | /* kvec data queued? */ | |
2441 | if (con->out_skip) { | |
2442 | ret = write_partial_skip(con); | |
2443 | if (ret <= 0) | |
42961d23 | 2444 | goto out; |
31b8006e SW |
2445 | } |
2446 | if (con->out_kvec_left) { | |
2447 | ret = write_partial_kvec(con); | |
2448 | if (ret <= 0) | |
42961d23 | 2449 | goto out; |
31b8006e SW |
2450 | } |
2451 | ||
2452 | /* msg pages? */ | |
2453 | if (con->out_msg) { | |
c86a2930 SW |
2454 | if (con->out_msg_done) { |
2455 | ceph_msg_put(con->out_msg); | |
2456 | con->out_msg = NULL; /* we're done with this one */ | |
2457 | goto do_next; | |
2458 | } | |
2459 | ||
34d2d200 | 2460 | ret = write_partial_message_data(con); |
31b8006e SW |
2461 | if (ret == 1) |
2462 | goto more_kvec; /* we need to send the footer, too! */ | |
2463 | if (ret == 0) | |
42961d23 | 2464 | goto out; |
31b8006e | 2465 | if (ret < 0) { |
34d2d200 | 2466 | dout("try_write write_partial_message_data err %d\n", |
31b8006e | 2467 | ret); |
42961d23 | 2468 | goto out; |
31b8006e SW |
2469 | } |
2470 | } | |
2471 | ||
c86a2930 | 2472 | do_next: |
8dacc7da | 2473 | if (con->state == CON_STATE_OPEN) { |
31b8006e SW |
2474 | /* is anything else pending? */ |
2475 | if (!list_empty(&con->out_queue)) { | |
2476 | prepare_write_message(con); | |
2477 | goto more; | |
2478 | } | |
2479 | if (con->in_seq > con->in_seq_acked) { | |
2480 | prepare_write_ack(con); | |
2481 | goto more; | |
2482 | } | |
c9ffc77a | 2483 | if (con_flag_test_and_clear(con, CON_FLAG_KEEPALIVE_PENDING)) { |
31b8006e SW |
2484 | prepare_write_keepalive(con); |
2485 | goto more; | |
2486 | } | |
2487 | } | |
2488 | ||
2489 | /* Nothing to do! */ | |
c9ffc77a | 2490 | con_flag_clear(con, CON_FLAG_WRITE_PENDING); |
31b8006e | 2491 | dout("try_write nothing else to write.\n"); |
31b8006e SW |
2492 | ret = 0; |
2493 | out: | |
42961d23 | 2494 | dout("try_write done on %p ret %d\n", con, ret); |
31b8006e SW |
2495 | return ret; |
2496 | } | |
2497 | ||
2498 | ||
2499 | ||
2500 | /* | |
2501 | * Read what we can from the socket. | |
2502 | */ | |
2503 | static int try_read(struct ceph_connection *con) | |
2504 | { | |
31b8006e SW |
2505 | int ret = -1; |
2506 | ||
8dacc7da SW |
2507 | more: |
2508 | dout("try_read start on %p state %lu\n", con, con->state); | |
2509 | if (con->state != CON_STATE_CONNECTING && | |
2510 | con->state != CON_STATE_NEGOTIATING && | |
2511 | con->state != CON_STATE_OPEN) | |
31b8006e SW |
2512 | return 0; |
2513 | ||
8dacc7da | 2514 | BUG_ON(!con->sock); |
ec302645 | 2515 | |
31b8006e SW |
2516 | dout("try_read tag %d in_base_pos %d\n", (int)con->in_tag, |
2517 | con->in_base_pos); | |
0da5d703 | 2518 | |
8dacc7da | 2519 | if (con->state == CON_STATE_CONNECTING) { |
7593af92 AE |
2520 | dout("try_read connecting\n"); |
2521 | ret = read_partial_banner(con); | |
2522 | if (ret <= 0) | |
ab166d5a | 2523 | goto out; |
7593af92 AE |
2524 | ret = process_banner(con); |
2525 | if (ret < 0) | |
2526 | goto out; | |
2527 | ||
8dacc7da | 2528 | con->state = CON_STATE_NEGOTIATING; |
7593af92 | 2529 | |
6d4221b5 JS |
2530 | /* |
2531 | * Received banner is good, exchange connection info. | |
2532 | * Do not reset out_kvec, as sending our banner raced | |
2533 | * with receiving peer banner after connect completed. | |
2534 | */ | |
7593af92 AE |
2535 | ret = prepare_write_connect(con); |
2536 | if (ret < 0) | |
2537 | goto out; | |
2538 | prepare_read_connect(con); | |
2539 | ||
2540 | /* Send connection info before awaiting response */ | |
0da5d703 SW |
2541 | goto out; |
2542 | } | |
2543 | ||
8dacc7da | 2544 | if (con->state == CON_STATE_NEGOTIATING) { |
7593af92 | 2545 | dout("try_read negotiating\n"); |
31b8006e SW |
2546 | ret = read_partial_connect(con); |
2547 | if (ret <= 0) | |
31b8006e | 2548 | goto out; |
98bdb0aa SW |
2549 | ret = process_connect(con); |
2550 | if (ret < 0) | |
2551 | goto out; | |
31b8006e SW |
2552 | goto more; |
2553 | } | |
2554 | ||
122070a2 | 2555 | WARN_ON(con->state != CON_STATE_OPEN); |
8dacc7da | 2556 | |
31b8006e SW |
2557 | if (con->in_base_pos < 0) { |
2558 | /* | |
2559 | * skipping + discarding content. | |
2560 | * | |
2561 | * FIXME: there must be a better way to do this! | |
2562 | */ | |
84495f49 AE |
2563 | static char buf[SKIP_BUF_SIZE]; |
2564 | int skip = min((int) sizeof (buf), -con->in_base_pos); | |
2565 | ||
31b8006e SW |
2566 | dout("skipping %d / %d bytes\n", skip, -con->in_base_pos); |
2567 | ret = ceph_tcp_recvmsg(con->sock, buf, skip); | |
2568 | if (ret <= 0) | |
98bdb0aa | 2569 | goto out; |
31b8006e SW |
2570 | con->in_base_pos += ret; |
2571 | if (con->in_base_pos) | |
2572 | goto more; | |
2573 | } | |
2574 | if (con->in_tag == CEPH_MSGR_TAG_READY) { | |
2575 | /* | |
2576 | * what's next? | |
2577 | */ | |
2578 | ret = ceph_tcp_recvmsg(con->sock, &con->in_tag, 1); | |
2579 | if (ret <= 0) | |
98bdb0aa | 2580 | goto out; |
31b8006e SW |
2581 | dout("try_read got tag %d\n", (int)con->in_tag); |
2582 | switch (con->in_tag) { | |
2583 | case CEPH_MSGR_TAG_MSG: | |
2584 | prepare_read_message(con); | |
2585 | break; | |
2586 | case CEPH_MSGR_TAG_ACK: | |
2587 | prepare_read_ack(con); | |
2588 | break; | |
2589 | case CEPH_MSGR_TAG_CLOSE: | |
8dacc7da SW |
2590 | con_close_socket(con); |
2591 | con->state = CON_STATE_CLOSED; | |
98bdb0aa | 2592 | goto out; |
31b8006e SW |
2593 | default: |
2594 | goto bad_tag; | |
2595 | } | |
2596 | } | |
2597 | if (con->in_tag == CEPH_MSGR_TAG_MSG) { | |
2598 | ret = read_partial_message(con); | |
2599 | if (ret <= 0) { | |
2600 | switch (ret) { | |
2601 | case -EBADMSG: | |
2602 | con->error_msg = "bad crc"; | |
2603 | ret = -EIO; | |
98bdb0aa | 2604 | break; |
31b8006e SW |
2605 | case -EIO: |
2606 | con->error_msg = "io error"; | |
98bdb0aa | 2607 | break; |
31b8006e | 2608 | } |
98bdb0aa | 2609 | goto out; |
31b8006e SW |
2610 | } |
2611 | if (con->in_tag == CEPH_MSGR_TAG_READY) | |
2612 | goto more; | |
2613 | process_message(con); | |
7b862e07 SW |
2614 | if (con->state == CON_STATE_OPEN) |
2615 | prepare_read_tag(con); | |
31b8006e SW |
2616 | goto more; |
2617 | } | |
3a23083b SW |
2618 | if (con->in_tag == CEPH_MSGR_TAG_ACK || |
2619 | con->in_tag == CEPH_MSGR_TAG_SEQ) { | |
2620 | /* | |
2621 | * the final handshake seq exchange is semantically | |
2622 | * equivalent to an ACK | |
2623 | */ | |
31b8006e SW |
2624 | ret = read_partial_ack(con); |
2625 | if (ret <= 0) | |
98bdb0aa | 2626 | goto out; |
31b8006e SW |
2627 | process_ack(con); |
2628 | goto more; | |
2629 | } | |
2630 | ||
31b8006e | 2631 | out: |
98bdb0aa | 2632 | dout("try_read done on %p ret %d\n", con, ret); |
31b8006e SW |
2633 | return ret; |
2634 | ||
2635 | bad_tag: | |
2636 | pr_err("try_read bad con->in_tag = %d\n", (int)con->in_tag); | |
2637 | con->error_msg = "protocol error, garbage tag"; | |
2638 | ret = -1; | |
2639 | goto out; | |
2640 | } | |
2641 | ||
2642 | ||
2643 | /* | |
802c6d96 AE |
2644 | * Atomically queue work on a connection after the specified delay. |
2645 | * Bump @con reference to avoid races with connection teardown. | |
2646 | * Returns 0 if work was queued, or an error code otherwise. | |
31b8006e | 2647 | */ |
802c6d96 | 2648 | static int queue_con_delay(struct ceph_connection *con, unsigned long delay) |
31b8006e | 2649 | { |
31b8006e | 2650 | if (!con->ops->get(con)) { |
802c6d96 AE |
2651 | dout("%s %p ref count 0\n", __func__, con); |
2652 | ||
2653 | return -ENOENT; | |
31b8006e SW |
2654 | } |
2655 | ||
802c6d96 AE |
2656 | if (!queue_delayed_work(ceph_msgr_wq, &con->work, delay)) { |
2657 | dout("%s %p - already queued\n", __func__, con); | |
31b8006e | 2658 | con->ops->put(con); |
802c6d96 AE |
2659 | |
2660 | return -EBUSY; | |
31b8006e | 2661 | } |
802c6d96 AE |
2662 | |
2663 | dout("%s %p %lu\n", __func__, con, delay); | |
2664 | ||
2665 | return 0; | |
2666 | } | |
2667 | ||
2668 | static void queue_con(struct ceph_connection *con) | |
2669 | { | |
2670 | (void) queue_con_delay(con, 0); | |
31b8006e SW |
2671 | } |
2672 | ||
7bb21d68 AE |
2673 | static bool con_sock_closed(struct ceph_connection *con) |
2674 | { | |
c9ffc77a | 2675 | if (!con_flag_test_and_clear(con, CON_FLAG_SOCK_CLOSED)) |
7bb21d68 AE |
2676 | return false; |
2677 | ||
2678 | #define CASE(x) \ | |
2679 | case CON_STATE_ ## x: \ | |
2680 | con->error_msg = "socket closed (con state " #x ")"; \ | |
2681 | break; | |
2682 | ||
2683 | switch (con->state) { | |
2684 | CASE(CLOSED); | |
2685 | CASE(PREOPEN); | |
2686 | CASE(CONNECTING); | |
2687 | CASE(NEGOTIATING); | |
2688 | CASE(OPEN); | |
2689 | CASE(STANDBY); | |
2690 | default: | |
2691 | pr_warning("%s con %p unrecognized state %lu\n", | |
2692 | __func__, con, con->state); | |
2693 | con->error_msg = "unrecognized con state"; | |
2694 | BUG(); | |
2695 | break; | |
2696 | } | |
2697 | #undef CASE | |
2698 | ||
2699 | return true; | |
2700 | } | |
2701 | ||
f20a39fd AE |
2702 | static bool con_backoff(struct ceph_connection *con) |
2703 | { | |
2704 | int ret; | |
2705 | ||
2706 | if (!con_flag_test_and_clear(con, CON_FLAG_BACKOFF)) | |
2707 | return false; | |
2708 | ||
2709 | ret = queue_con_delay(con, round_jiffies_relative(con->delay)); | |
2710 | if (ret) { | |
2711 | dout("%s: con %p FAILED to back off %lu\n", __func__, | |
2712 | con, con->delay); | |
2713 | BUG_ON(ret == -ENOENT); | |
2714 | con_flag_set(con, CON_FLAG_BACKOFF); | |
2715 | } | |
2716 | ||
2717 | return true; | |
2718 | } | |
2719 | ||
93209264 AE |
2720 | /* Finish fault handling; con->mutex must *not* be held here */ |
2721 | ||
2722 | static void con_fault_finish(struct ceph_connection *con) | |
2723 | { | |
2724 | /* | |
2725 | * in case we faulted due to authentication, invalidate our | |
2726 | * current tickets so that we can get new ones. | |
2727 | */ | |
2728 | if (con->auth_retry && con->ops->invalidate_authorizer) { | |
2729 | dout("calling invalidate_authorizer()\n"); | |
2730 | con->ops->invalidate_authorizer(con); | |
2731 | } | |
2732 | ||
2733 | if (con->ops->fault) | |
2734 | con->ops->fault(con); | |
2735 | } | |
2736 | ||
31b8006e SW |
2737 | /* |
2738 | * Do some work on a connection. Drop a connection ref when we're done. | |
2739 | */ | |
2740 | static void con_work(struct work_struct *work) | |
2741 | { | |
2742 | struct ceph_connection *con = container_of(work, struct ceph_connection, | |
2743 | work.work); | |
49659416 | 2744 | bool fault; |
31b8006e | 2745 | |
9dd4658d | 2746 | mutex_lock(&con->mutex); |
49659416 AE |
2747 | while (true) { |
2748 | int ret; | |
31b8006e | 2749 | |
49659416 AE |
2750 | if ((fault = con_sock_closed(con))) { |
2751 | dout("%s: con %p SOCK_CLOSED\n", __func__, con); | |
2752 | break; | |
2753 | } | |
2754 | if (con_backoff(con)) { | |
2755 | dout("%s: con %p BACKOFF\n", __func__, con); | |
2756 | break; | |
2757 | } | |
2758 | if (con->state == CON_STATE_STANDBY) { | |
2759 | dout("%s: con %p STANDBY\n", __func__, con); | |
2760 | break; | |
2761 | } | |
2762 | if (con->state == CON_STATE_CLOSED) { | |
2763 | dout("%s: con %p CLOSED\n", __func__, con); | |
2764 | BUG_ON(con->sock); | |
2765 | break; | |
2766 | } | |
2767 | if (con->state == CON_STATE_PREOPEN) { | |
2768 | dout("%s: con %p PREOPEN\n", __func__, con); | |
2769 | BUG_ON(con->sock); | |
2770 | } | |
0da5d703 | 2771 | |
49659416 AE |
2772 | ret = try_read(con); |
2773 | if (ret < 0) { | |
2774 | if (ret == -EAGAIN) | |
2775 | continue; | |
2776 | con->error_msg = "socket error on read"; | |
2777 | fault = true; | |
2778 | break; | |
2779 | } | |
2780 | ||
2781 | ret = try_write(con); | |
2782 | if (ret < 0) { | |
2783 | if (ret == -EAGAIN) | |
2784 | continue; | |
2785 | con->error_msg = "socket error on write"; | |
2786 | fault = true; | |
2787 | } | |
2788 | ||
2789 | break; /* If we make it to here, we're done */ | |
3a140a0d | 2790 | } |
b6e7b6a1 AE |
2791 | if (fault) |
2792 | con_fault(con); | |
9dd4658d | 2793 | mutex_unlock(&con->mutex); |
0da5d703 | 2794 | |
b6e7b6a1 AE |
2795 | if (fault) |
2796 | con_fault_finish(con); | |
2797 | ||
2798 | con->ops->put(con); | |
31b8006e SW |
2799 | } |
2800 | ||
31b8006e SW |
2801 | /* |
2802 | * Generic error/fault handler. A retry mechanism is used with | |
2803 | * exponential backoff | |
2804 | */ | |
93209264 | 2805 | static void con_fault(struct ceph_connection *con) |
31b8006e | 2806 | { |
28362986 | 2807 | pr_warning("%s%lld %s %s\n", ENTITY_NAME(con->peer_name), |
3d14c5d2 | 2808 | ceph_pr_addr(&con->peer_addr.in_addr), con->error_msg); |
31b8006e | 2809 | dout("fault %p state %lu to peer %s\n", |
3d14c5d2 | 2810 | con, con->state, ceph_pr_addr(&con->peer_addr.in_addr)); |
31b8006e | 2811 | |
122070a2 | 2812 | WARN_ON(con->state != CON_STATE_CONNECTING && |
8dacc7da SW |
2813 | con->state != CON_STATE_NEGOTIATING && |
2814 | con->state != CON_STATE_OPEN); | |
ec302645 | 2815 | |
31b8006e | 2816 | con_close_socket(con); |
5e095e8b | 2817 | |
c9ffc77a | 2818 | if (con_flag_test(con, CON_FLAG_LOSSYTX)) { |
8dacc7da SW |
2819 | dout("fault on LOSSYTX channel, marking CLOSED\n"); |
2820 | con->state = CON_STATE_CLOSED; | |
93209264 | 2821 | return; |
3b5ede07 SW |
2822 | } |
2823 | ||
5e095e8b | 2824 | if (con->in_msg) { |
38941f80 AE |
2825 | BUG_ON(con->in_msg->con != con); |
2826 | con->in_msg->con = NULL; | |
5e095e8b SW |
2827 | ceph_msg_put(con->in_msg); |
2828 | con->in_msg = NULL; | |
36eb71aa | 2829 | con->ops->put(con); |
5e095e8b | 2830 | } |
31b8006e | 2831 | |
e80a52d1 SW |
2832 | /* Requeue anything that hasn't been acked */ |
2833 | list_splice_init(&con->out_sent, &con->out_queue); | |
9bd2e6f8 | 2834 | |
e76661d0 SW |
2835 | /* If there are no messages queued or keepalive pending, place |
2836 | * the connection in a STANDBY state */ | |
2837 | if (list_empty(&con->out_queue) && | |
c9ffc77a | 2838 | !con_flag_test(con, CON_FLAG_KEEPALIVE_PENDING)) { |
e00de341 | 2839 | dout("fault %p setting STANDBY clearing WRITE_PENDING\n", con); |
c9ffc77a | 2840 | con_flag_clear(con, CON_FLAG_WRITE_PENDING); |
8dacc7da | 2841 | con->state = CON_STATE_STANDBY; |
e80a52d1 SW |
2842 | } else { |
2843 | /* retry after a delay. */ | |
8dacc7da | 2844 | con->state = CON_STATE_PREOPEN; |
e80a52d1 SW |
2845 | if (con->delay == 0) |
2846 | con->delay = BASE_DELAY_INTERVAL; | |
2847 | else if (con->delay < MAX_DELAY_INTERVAL) | |
2848 | con->delay *= 2; | |
c9ffc77a | 2849 | con_flag_set(con, CON_FLAG_BACKOFF); |
8618e30b | 2850 | queue_con(con); |
31b8006e | 2851 | } |
31b8006e SW |
2852 | } |
2853 | ||
2854 | ||
2855 | ||
2856 | /* | |
15d9882c | 2857 | * initialize a new messenger instance |
31b8006e | 2858 | */ |
15d9882c AE |
2859 | void ceph_messenger_init(struct ceph_messenger *msgr, |
2860 | struct ceph_entity_addr *myaddr, | |
12b4629a ID |
2861 | u64 supported_features, |
2862 | u64 required_features, | |
15d9882c | 2863 | bool nocrc) |
31b8006e | 2864 | { |
3d14c5d2 YS |
2865 | msgr->supported_features = supported_features; |
2866 | msgr->required_features = required_features; | |
2867 | ||
31b8006e SW |
2868 | spin_lock_init(&msgr->global_seq_lock); |
2869 | ||
31b8006e SW |
2870 | if (myaddr) |
2871 | msgr->inst.addr = *myaddr; | |
2872 | ||
2873 | /* select a random nonce */ | |
ac8839d7 | 2874 | msgr->inst.addr.type = 0; |
103e2d3a | 2875 | get_random_bytes(&msgr->inst.addr.nonce, sizeof(msgr->inst.addr.nonce)); |
63f2d211 | 2876 | encode_my_addr(msgr); |
15d9882c | 2877 | msgr->nocrc = nocrc; |
31b8006e | 2878 | |
a2a32584 | 2879 | atomic_set(&msgr->stopping, 0); |
31b8006e | 2880 | |
15d9882c | 2881 | dout("%s %p\n", __func__, msgr); |
31b8006e | 2882 | } |
15d9882c | 2883 | EXPORT_SYMBOL(ceph_messenger_init); |
31b8006e | 2884 | |
e00de341 SW |
2885 | static void clear_standby(struct ceph_connection *con) |
2886 | { | |
2887 | /* come back from STANDBY? */ | |
8dacc7da | 2888 | if (con->state == CON_STATE_STANDBY) { |
e00de341 | 2889 | dout("clear_standby %p and ++connect_seq\n", con); |
8dacc7da | 2890 | con->state = CON_STATE_PREOPEN; |
e00de341 | 2891 | con->connect_seq++; |
c9ffc77a AE |
2892 | WARN_ON(con_flag_test(con, CON_FLAG_WRITE_PENDING)); |
2893 | WARN_ON(con_flag_test(con, CON_FLAG_KEEPALIVE_PENDING)); | |
e00de341 SW |
2894 | } |
2895 | } | |
2896 | ||
31b8006e SW |
2897 | /* |
2898 | * Queue up an outgoing message on the given connection. | |
2899 | */ | |
2900 | void ceph_con_send(struct ceph_connection *con, struct ceph_msg *msg) | |
2901 | { | |
31b8006e | 2902 | /* set src+dst */ |
dbad185d | 2903 | msg->hdr.src = con->msgr->inst.name; |
3ca02ef9 | 2904 | BUG_ON(msg->front.iov_len != le32_to_cpu(msg->hdr.front_len)); |
e84346b7 SW |
2905 | msg->needs_out_seq = true; |
2906 | ||
ec302645 | 2907 | mutex_lock(&con->mutex); |
92ce034b | 2908 | |
8dacc7da | 2909 | if (con->state == CON_STATE_CLOSED) { |
a59b55a6 SW |
2910 | dout("con_send %p closed, dropping %p\n", con, msg); |
2911 | ceph_msg_put(msg); | |
2912 | mutex_unlock(&con->mutex); | |
2913 | return; | |
2914 | } | |
2915 | ||
38941f80 | 2916 | BUG_ON(msg->con != NULL); |
36eb71aa | 2917 | msg->con = con->ops->get(con); |
92ce034b AE |
2918 | BUG_ON(msg->con == NULL); |
2919 | ||
31b8006e SW |
2920 | BUG_ON(!list_empty(&msg->list_head)); |
2921 | list_add_tail(&msg->list_head, &con->out_queue); | |
2922 | dout("----- %p to %s%lld %d=%s len %d+%d+%d -----\n", msg, | |
2923 | ENTITY_NAME(con->peer_name), le16_to_cpu(msg->hdr.type), | |
2924 | ceph_msg_type_name(le16_to_cpu(msg->hdr.type)), | |
2925 | le32_to_cpu(msg->hdr.front_len), | |
2926 | le32_to_cpu(msg->hdr.middle_len), | |
2927 | le32_to_cpu(msg->hdr.data_len)); | |
00650931 SW |
2928 | |
2929 | clear_standby(con); | |
ec302645 | 2930 | mutex_unlock(&con->mutex); |
31b8006e SW |
2931 | |
2932 | /* if there wasn't anything waiting to send before, queue | |
2933 | * new work */ | |
c9ffc77a | 2934 | if (con_flag_test_and_set(con, CON_FLAG_WRITE_PENDING) == 0) |
31b8006e SW |
2935 | queue_con(con); |
2936 | } | |
3d14c5d2 | 2937 | EXPORT_SYMBOL(ceph_con_send); |
31b8006e SW |
2938 | |
2939 | /* | |
2940 | * Revoke a message that was previously queued for send | |
2941 | */ | |
6740a845 | 2942 | void ceph_msg_revoke(struct ceph_msg *msg) |
31b8006e | 2943 | { |
6740a845 AE |
2944 | struct ceph_connection *con = msg->con; |
2945 | ||
2946 | if (!con) | |
2947 | return; /* Message not in our possession */ | |
2948 | ||
ec302645 | 2949 | mutex_lock(&con->mutex); |
31b8006e | 2950 | if (!list_empty(&msg->list_head)) { |
38941f80 | 2951 | dout("%s %p msg %p - was on queue\n", __func__, con, msg); |
31b8006e | 2952 | list_del_init(&msg->list_head); |
38941f80 | 2953 | BUG_ON(msg->con == NULL); |
36eb71aa | 2954 | msg->con->ops->put(msg->con); |
38941f80 | 2955 | msg->con = NULL; |
31b8006e | 2956 | msg->hdr.seq = 0; |
38941f80 | 2957 | |
31b8006e | 2958 | ceph_msg_put(msg); |
ed98adad SW |
2959 | } |
2960 | if (con->out_msg == msg) { | |
38941f80 | 2961 | dout("%s %p msg %p - was sending\n", __func__, con, msg); |
ed98adad | 2962 | con->out_msg = NULL; |
31b8006e SW |
2963 | if (con->out_kvec_is_msg) { |
2964 | con->out_skip = con->out_kvec_bytes; | |
2965 | con->out_kvec_is_msg = false; | |
2966 | } | |
ed98adad | 2967 | msg->hdr.seq = 0; |
92ce034b AE |
2968 | |
2969 | ceph_msg_put(msg); | |
31b8006e | 2970 | } |
ec302645 | 2971 | mutex_unlock(&con->mutex); |
31b8006e SW |
2972 | } |
2973 | ||
350b1c32 | 2974 | /* |
0d59ab81 | 2975 | * Revoke a message that we may be reading data into |
350b1c32 | 2976 | */ |
8921d114 | 2977 | void ceph_msg_revoke_incoming(struct ceph_msg *msg) |
350b1c32 | 2978 | { |
8921d114 AE |
2979 | struct ceph_connection *con; |
2980 | ||
2981 | BUG_ON(msg == NULL); | |
2982 | if (!msg->con) { | |
2983 | dout("%s msg %p null con\n", __func__, msg); | |
2984 | ||
2985 | return; /* Message not in our possession */ | |
2986 | } | |
2987 | ||
2988 | con = msg->con; | |
350b1c32 | 2989 | mutex_lock(&con->mutex); |
8921d114 | 2990 | if (con->in_msg == msg) { |
95c96174 ED |
2991 | unsigned int front_len = le32_to_cpu(con->in_hdr.front_len); |
2992 | unsigned int middle_len = le32_to_cpu(con->in_hdr.middle_len); | |
2993 | unsigned int data_len = le32_to_cpu(con->in_hdr.data_len); | |
350b1c32 SW |
2994 | |
2995 | /* skip rest of message */ | |
8921d114 AE |
2996 | dout("%s %p msg %p revoked\n", __func__, con, msg); |
2997 | con->in_base_pos = con->in_base_pos - | |
350b1c32 | 2998 | sizeof(struct ceph_msg_header) - |
0d59ab81 YS |
2999 | front_len - |
3000 | middle_len - | |
3001 | data_len - | |
350b1c32 | 3002 | sizeof(struct ceph_msg_footer); |
350b1c32 SW |
3003 | ceph_msg_put(con->in_msg); |
3004 | con->in_msg = NULL; | |
3005 | con->in_tag = CEPH_MSGR_TAG_READY; | |
684be25c | 3006 | con->in_seq++; |
350b1c32 | 3007 | } else { |
8921d114 AE |
3008 | dout("%s %p in_msg %p msg %p no-op\n", |
3009 | __func__, con, con->in_msg, msg); | |
350b1c32 SW |
3010 | } |
3011 | mutex_unlock(&con->mutex); | |
3012 | } | |
3013 | ||
31b8006e SW |
3014 | /* |
3015 | * Queue a keepalive byte to ensure the tcp connection is alive. | |
3016 | */ | |
3017 | void ceph_con_keepalive(struct ceph_connection *con) | |
3018 | { | |
e00de341 | 3019 | dout("con_keepalive %p\n", con); |
00650931 | 3020 | mutex_lock(&con->mutex); |
e00de341 | 3021 | clear_standby(con); |
00650931 | 3022 | mutex_unlock(&con->mutex); |
c9ffc77a AE |
3023 | if (con_flag_test_and_set(con, CON_FLAG_KEEPALIVE_PENDING) == 0 && |
3024 | con_flag_test_and_set(con, CON_FLAG_WRITE_PENDING) == 0) | |
31b8006e SW |
3025 | queue_con(con); |
3026 | } | |
3d14c5d2 | 3027 | EXPORT_SYMBOL(ceph_con_keepalive); |
31b8006e | 3028 | |
6644ed7b | 3029 | static struct ceph_msg_data *ceph_msg_data_create(enum ceph_msg_data_type type) |
43794509 | 3030 | { |
6644ed7b AE |
3031 | struct ceph_msg_data *data; |
3032 | ||
3033 | if (WARN_ON(!ceph_msg_data_type_valid(type))) | |
3034 | return NULL; | |
3035 | ||
81b36be4 | 3036 | data = kmem_cache_zalloc(ceph_msg_data_cache, GFP_NOFS); |
6644ed7b AE |
3037 | if (data) |
3038 | data->type = type; | |
5240d9f9 | 3039 | INIT_LIST_HEAD(&data->links); |
6644ed7b AE |
3040 | |
3041 | return data; | |
3042 | } | |
3043 | ||
3044 | static void ceph_msg_data_destroy(struct ceph_msg_data *data) | |
3045 | { | |
3046 | if (!data) | |
3047 | return; | |
3048 | ||
5240d9f9 | 3049 | WARN_ON(!list_empty(&data->links)); |
6644ed7b AE |
3050 | if (data->type == CEPH_MSG_DATA_PAGELIST) { |
3051 | ceph_pagelist_release(data->pagelist); | |
3052 | kfree(data->pagelist); | |
3053 | } | |
81b36be4 | 3054 | kmem_cache_free(ceph_msg_data_cache, data); |
43794509 AE |
3055 | } |
3056 | ||
90af3602 | 3057 | void ceph_msg_data_add_pages(struct ceph_msg *msg, struct page **pages, |
f1baeb2b | 3058 | size_t length, size_t alignment) |
02afca6c | 3059 | { |
6644ed7b AE |
3060 | struct ceph_msg_data *data; |
3061 | ||
07aa1558 AE |
3062 | BUG_ON(!pages); |
3063 | BUG_ON(!length); | |
6644ed7b AE |
3064 | |
3065 | data = ceph_msg_data_create(CEPH_MSG_DATA_PAGES); | |
3066 | BUG_ON(!data); | |
3067 | data->pages = pages; | |
3068 | data->length = length; | |
3069 | data->alignment = alignment & ~PAGE_MASK; | |
02afca6c | 3070 | |
5240d9f9 AE |
3071 | list_add_tail(&data->links, &msg->data); |
3072 | msg->data_length += length; | |
02afca6c | 3073 | } |
90af3602 | 3074 | EXPORT_SYMBOL(ceph_msg_data_add_pages); |
31b8006e | 3075 | |
90af3602 | 3076 | void ceph_msg_data_add_pagelist(struct ceph_msg *msg, |
27fa8385 AE |
3077 | struct ceph_pagelist *pagelist) |
3078 | { | |
6644ed7b AE |
3079 | struct ceph_msg_data *data; |
3080 | ||
07aa1558 AE |
3081 | BUG_ON(!pagelist); |
3082 | BUG_ON(!pagelist->length); | |
27fa8385 | 3083 | |
6644ed7b AE |
3084 | data = ceph_msg_data_create(CEPH_MSG_DATA_PAGELIST); |
3085 | BUG_ON(!data); | |
3086 | data->pagelist = pagelist; | |
3087 | ||
5240d9f9 AE |
3088 | list_add_tail(&data->links, &msg->data); |
3089 | msg->data_length += pagelist->length; | |
27fa8385 | 3090 | } |
90af3602 | 3091 | EXPORT_SYMBOL(ceph_msg_data_add_pagelist); |
27fa8385 | 3092 | |
ea96571f | 3093 | #ifdef CONFIG_BLOCK |
90af3602 | 3094 | void ceph_msg_data_add_bio(struct ceph_msg *msg, struct bio *bio, |
a1930804 | 3095 | size_t length) |
27fa8385 | 3096 | { |
6644ed7b AE |
3097 | struct ceph_msg_data *data; |
3098 | ||
07aa1558 | 3099 | BUG_ON(!bio); |
27fa8385 | 3100 | |
6644ed7b AE |
3101 | data = ceph_msg_data_create(CEPH_MSG_DATA_BIO); |
3102 | BUG_ON(!data); | |
3103 | data->bio = bio; | |
c851c495 | 3104 | data->bio_length = length; |
6644ed7b | 3105 | |
5240d9f9 AE |
3106 | list_add_tail(&data->links, &msg->data); |
3107 | msg->data_length += length; | |
27fa8385 | 3108 | } |
90af3602 | 3109 | EXPORT_SYMBOL(ceph_msg_data_add_bio); |
ea96571f | 3110 | #endif /* CONFIG_BLOCK */ |
27fa8385 | 3111 | |
31b8006e SW |
3112 | /* |
3113 | * construct a new message with given type, size | |
3114 | * the new msg has a ref count of 1. | |
3115 | */ | |
b61c2763 SW |
3116 | struct ceph_msg *ceph_msg_new(int type, int front_len, gfp_t flags, |
3117 | bool can_fail) | |
31b8006e SW |
3118 | { |
3119 | struct ceph_msg *m; | |
3120 | ||
e3d5d638 | 3121 | m = kmem_cache_zalloc(ceph_msg_cache, flags); |
31b8006e SW |
3122 | if (m == NULL) |
3123 | goto out; | |
31b8006e SW |
3124 | |
3125 | m->hdr.type = cpu_to_le16(type); | |
45c6ceb5 | 3126 | m->hdr.priority = cpu_to_le16(CEPH_MSG_PRIO_DEFAULT); |
31b8006e | 3127 | m->hdr.front_len = cpu_to_le32(front_len); |
ca20892d | 3128 | |
9516e45b AE |
3129 | INIT_LIST_HEAD(&m->list_head); |
3130 | kref_init(&m->kref); | |
5240d9f9 | 3131 | INIT_LIST_HEAD(&m->data); |
ca20892d | 3132 | |
31b8006e SW |
3133 | /* front */ |
3134 | if (front_len) { | |
eeb0bed5 | 3135 | m->front.iov_base = ceph_kvmalloc(front_len, flags); |
31b8006e | 3136 | if (m->front.iov_base == NULL) { |
b61c2763 | 3137 | dout("ceph_msg_new can't allocate %d bytes\n", |
31b8006e SW |
3138 | front_len); |
3139 | goto out2; | |
3140 | } | |
3141 | } else { | |
3142 | m->front.iov_base = NULL; | |
3143 | } | |
f2be82b0 | 3144 | m->front_alloc_len = m->front.iov_len = front_len; |
31b8006e | 3145 | |
bb257664 | 3146 | dout("ceph_msg_new %p front %d\n", m, front_len); |
31b8006e SW |
3147 | return m; |
3148 | ||
3149 | out2: | |
3150 | ceph_msg_put(m); | |
3151 | out: | |
b61c2763 SW |
3152 | if (!can_fail) { |
3153 | pr_err("msg_new can't create type %d front %d\n", type, | |
3154 | front_len); | |
f0ed1b7c | 3155 | WARN_ON(1); |
b61c2763 SW |
3156 | } else { |
3157 | dout("msg_new can't create type %d front %d\n", type, | |
3158 | front_len); | |
3159 | } | |
a79832f2 | 3160 | return NULL; |
31b8006e | 3161 | } |
3d14c5d2 | 3162 | EXPORT_SYMBOL(ceph_msg_new); |
31b8006e | 3163 | |
31b8006e SW |
3164 | /* |
3165 | * Allocate "middle" portion of a message, if it is needed and wasn't | |
3166 | * allocated by alloc_msg. This allows us to read a small fixed-size | |
3167 | * per-type header in the front and then gracefully fail (i.e., | |
3168 | * propagate the error to the caller based on info in the front) when | |
3169 | * the middle is too large. | |
3170 | */ | |
2450418c | 3171 | static int ceph_alloc_middle(struct ceph_connection *con, struct ceph_msg *msg) |
31b8006e SW |
3172 | { |
3173 | int type = le16_to_cpu(msg->hdr.type); | |
3174 | int middle_len = le32_to_cpu(msg->hdr.middle_len); | |
3175 | ||
3176 | dout("alloc_middle %p type %d %s middle_len %d\n", msg, type, | |
3177 | ceph_msg_type_name(type), middle_len); | |
3178 | BUG_ON(!middle_len); | |
3179 | BUG_ON(msg->middle); | |
3180 | ||
b6c1d5b8 | 3181 | msg->middle = ceph_buffer_new(middle_len, GFP_NOFS); |
31b8006e SW |
3182 | if (!msg->middle) |
3183 | return -ENOMEM; | |
3184 | return 0; | |
3185 | } | |
3186 | ||
2450418c | 3187 | /* |
1c20f2d2 AE |
3188 | * Allocate a message for receiving an incoming message on a |
3189 | * connection, and save the result in con->in_msg. Uses the | |
3190 | * connection's private alloc_msg op if available. | |
3191 | * | |
4740a623 SW |
3192 | * Returns 0 on success, or a negative error code. |
3193 | * | |
3194 | * On success, if we set *skip = 1: | |
3195 | * - the next message should be skipped and ignored. | |
3196 | * - con->in_msg == NULL | |
3197 | * or if we set *skip = 0: | |
3198 | * - con->in_msg is non-null. | |
3199 | * On error (ENOMEM, EAGAIN, ...), | |
3200 | * - con->in_msg == NULL | |
2450418c | 3201 | */ |
4740a623 | 3202 | static int ceph_con_in_msg_alloc(struct ceph_connection *con, int *skip) |
2450418c | 3203 | { |
4740a623 | 3204 | struct ceph_msg_header *hdr = &con->in_hdr; |
2450418c | 3205 | int middle_len = le32_to_cpu(hdr->middle_len); |
1d866d1c | 3206 | struct ceph_msg *msg; |
4740a623 | 3207 | int ret = 0; |
2450418c | 3208 | |
1c20f2d2 | 3209 | BUG_ON(con->in_msg != NULL); |
53ded495 | 3210 | BUG_ON(!con->ops->alloc_msg); |
2450418c | 3211 | |
53ded495 AE |
3212 | mutex_unlock(&con->mutex); |
3213 | msg = con->ops->alloc_msg(con, hdr, skip); | |
3214 | mutex_lock(&con->mutex); | |
3215 | if (con->state != CON_STATE_OPEN) { | |
3216 | if (msg) | |
1d866d1c | 3217 | ceph_msg_put(msg); |
53ded495 AE |
3218 | return -EAGAIN; |
3219 | } | |
4137577a AE |
3220 | if (msg) { |
3221 | BUG_ON(*skip); | |
3222 | con->in_msg = msg; | |
36eb71aa | 3223 | con->in_msg->con = con->ops->get(con); |
92ce034b | 3224 | BUG_ON(con->in_msg->con == NULL); |
4137577a AE |
3225 | } else { |
3226 | /* | |
3227 | * Null message pointer means either we should skip | |
3228 | * this message or we couldn't allocate memory. The | |
3229 | * former is not an error. | |
3230 | */ | |
3231 | if (*skip) | |
3232 | return 0; | |
3233 | con->error_msg = "error allocating memory for incoming message"; | |
3234 | ||
53ded495 | 3235 | return -ENOMEM; |
2450418c | 3236 | } |
1c20f2d2 | 3237 | memcpy(&con->in_msg->hdr, &con->in_hdr, sizeof(con->in_hdr)); |
2450418c | 3238 | |
1c20f2d2 AE |
3239 | if (middle_len && !con->in_msg->middle) { |
3240 | ret = ceph_alloc_middle(con, con->in_msg); | |
2450418c | 3241 | if (ret < 0) { |
1c20f2d2 AE |
3242 | ceph_msg_put(con->in_msg); |
3243 | con->in_msg = NULL; | |
2450418c YS |
3244 | } |
3245 | } | |
9d7f0f13 | 3246 | |
4740a623 | 3247 | return ret; |
2450418c YS |
3248 | } |
3249 | ||
31b8006e SW |
3250 | |
3251 | /* | |
3252 | * Free a generically kmalloc'd message. | |
3253 | */ | |
3254 | void ceph_msg_kfree(struct ceph_msg *m) | |
3255 | { | |
3256 | dout("msg_kfree %p\n", m); | |
eeb0bed5 | 3257 | ceph_kvfree(m->front.iov_base); |
e3d5d638 | 3258 | kmem_cache_free(ceph_msg_cache, m); |
31b8006e SW |
3259 | } |
3260 | ||
3261 | /* | |
3262 | * Drop a msg ref. Destroy as needed. | |
3263 | */ | |
c2e552e7 SW |
3264 | void ceph_msg_last_put(struct kref *kref) |
3265 | { | |
3266 | struct ceph_msg *m = container_of(kref, struct ceph_msg, kref); | |
5240d9f9 AE |
3267 | LIST_HEAD(data); |
3268 | struct list_head *links; | |
3269 | struct list_head *next; | |
31b8006e | 3270 | |
c2e552e7 SW |
3271 | dout("ceph_msg_put last one on %p\n", m); |
3272 | WARN_ON(!list_empty(&m->list_head)); | |
3273 | ||
3274 | /* drop middle, data, if any */ | |
3275 | if (m->middle) { | |
3276 | ceph_buffer_put(m->middle); | |
3277 | m->middle = NULL; | |
31b8006e | 3278 | } |
5240d9f9 AE |
3279 | |
3280 | list_splice_init(&m->data, &data); | |
3281 | list_for_each_safe(links, next, &data) { | |
3282 | struct ceph_msg_data *data; | |
3283 | ||
3284 | data = list_entry(links, struct ceph_msg_data, links); | |
3285 | list_del_init(links); | |
3286 | ceph_msg_data_destroy(data); | |
3287 | } | |
a1930804 | 3288 | m->data_length = 0; |
58bb3b37 | 3289 | |
c2e552e7 SW |
3290 | if (m->pool) |
3291 | ceph_msgpool_put(m->pool, m); | |
3292 | else | |
3293 | ceph_msg_kfree(m); | |
31b8006e | 3294 | } |
3d14c5d2 | 3295 | EXPORT_SYMBOL(ceph_msg_last_put); |
9ec7cab1 SW |
3296 | |
3297 | void ceph_msg_dump(struct ceph_msg *msg) | |
3298 | { | |
3cea4c30 ID |
3299 | pr_debug("msg_dump %p (front_alloc_len %d length %zd)\n", msg, |
3300 | msg->front_alloc_len, msg->data_length); | |
9ec7cab1 SW |
3301 | print_hex_dump(KERN_DEBUG, "header: ", |
3302 | DUMP_PREFIX_OFFSET, 16, 1, | |
3303 | &msg->hdr, sizeof(msg->hdr), true); | |
3304 | print_hex_dump(KERN_DEBUG, " front: ", | |
3305 | DUMP_PREFIX_OFFSET, 16, 1, | |
3306 | msg->front.iov_base, msg->front.iov_len, true); | |
3307 | if (msg->middle) | |
3308 | print_hex_dump(KERN_DEBUG, "middle: ", | |
3309 | DUMP_PREFIX_OFFSET, 16, 1, | |
3310 | msg->middle->vec.iov_base, | |
3311 | msg->middle->vec.iov_len, true); | |
3312 | print_hex_dump(KERN_DEBUG, "footer: ", | |
3313 | DUMP_PREFIX_OFFSET, 16, 1, | |
3314 | &msg->footer, sizeof(msg->footer), true); | |
3315 | } | |
3d14c5d2 | 3316 | EXPORT_SYMBOL(ceph_msg_dump); |