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 | ||
3d14c5d2 YS |
18 | #include <linux/ceph/libceph.h> |
19 | #include <linux/ceph/messenger.h> | |
20 | #include <linux/ceph/decode.h> | |
21 | #include <linux/ceph/pagelist.h> | |
bc3b2d7f | 22 | #include <linux/export.h> |
31b8006e | 23 | |
fe38a2b6 AE |
24 | #define list_entry_next(pos, member) \ |
25 | list_entry(pos->member.next, typeof(*pos), member) | |
26 | ||
31b8006e SW |
27 | /* |
28 | * Ceph uses the messenger to exchange ceph_msg messages with other | |
29 | * hosts in the system. The messenger provides ordered and reliable | |
30 | * delivery. We tolerate TCP disconnects by reconnecting (with | |
31 | * exponential backoff) in the case of a fault (disconnection, bad | |
32 | * crc, protocol error). Acks allow sent messages to be discarded by | |
33 | * the sender. | |
34 | */ | |
35 | ||
bc18f4b1 AE |
36 | /* |
37 | * We track the state of the socket on a given connection using | |
38 | * values defined below. The transition to a new socket state is | |
39 | * handled by a function which verifies we aren't coming from an | |
40 | * unexpected state. | |
41 | * | |
42 | * -------- | |
43 | * | NEW* | transient initial state | |
44 | * -------- | |
45 | * | con_sock_state_init() | |
46 | * v | |
47 | * ---------- | |
48 | * | CLOSED | initialized, but no socket (and no | |
49 | * ---------- TCP connection) | |
50 | * ^ \ | |
51 | * | \ con_sock_state_connecting() | |
52 | * | ---------------------- | |
53 | * | \ | |
54 | * + con_sock_state_closed() \ | |
fbb85a47 SW |
55 | * |+--------------------------- \ |
56 | * | \ \ \ | |
57 | * | ----------- \ \ | |
58 | * | | CLOSING | socket event; \ \ | |
59 | * | ----------- await close \ \ | |
60 | * | ^ \ | | |
61 | * | | \ | | |
62 | * | + con_sock_state_closing() \ | | |
63 | * | / \ | | | |
64 | * | / --------------- | | | |
65 | * | / \ v v | |
bc18f4b1 AE |
66 | * | / -------------- |
67 | * | / -----------------| CONNECTING | socket created, TCP | |
68 | * | | / -------------- connect initiated | |
69 | * | | | con_sock_state_connected() | |
70 | * | | v | |
71 | * ------------- | |
72 | * | CONNECTED | TCP connection established | |
73 | * ------------- | |
74 | * | |
75 | * State values for ceph_connection->sock_state; NEW is assumed to be 0. | |
76 | */ | |
ce2c8903 AE |
77 | |
78 | #define CON_SOCK_STATE_NEW 0 /* -> CLOSED */ | |
79 | #define CON_SOCK_STATE_CLOSED 1 /* -> CONNECTING */ | |
80 | #define CON_SOCK_STATE_CONNECTING 2 /* -> CONNECTED or -> CLOSING */ | |
81 | #define CON_SOCK_STATE_CONNECTED 3 /* -> CLOSING or -> CLOSED */ | |
82 | #define CON_SOCK_STATE_CLOSING 4 /* -> CLOSED */ | |
83 | ||
8dacc7da SW |
84 | /* |
85 | * connection states | |
86 | */ | |
87 | #define CON_STATE_CLOSED 1 /* -> PREOPEN */ | |
88 | #define CON_STATE_PREOPEN 2 /* -> CONNECTING, CLOSED */ | |
89 | #define CON_STATE_CONNECTING 3 /* -> NEGOTIATING, CLOSED */ | |
90 | #define CON_STATE_NEGOTIATING 4 /* -> OPEN, CLOSED */ | |
91 | #define CON_STATE_OPEN 5 /* -> STANDBY, CLOSED */ | |
92 | #define CON_STATE_STANDBY 6 /* -> PREOPEN, CLOSED */ | |
93 | ||
4a861692 SW |
94 | /* |
95 | * ceph_connection flag bits | |
96 | */ | |
97 | #define CON_FLAG_LOSSYTX 0 /* we can close channel or drop | |
98 | * messages on errors */ | |
99 | #define CON_FLAG_KEEPALIVE_PENDING 1 /* we need to send a keepalive */ | |
100 | #define CON_FLAG_WRITE_PENDING 2 /* we have data ready to send */ | |
101 | #define CON_FLAG_SOCK_CLOSED 3 /* socket state changed to closed */ | |
102 | #define CON_FLAG_BACKOFF 4 /* need to retry queuing delayed work */ | |
8dacc7da | 103 | |
c9ffc77a AE |
104 | static bool con_flag_valid(unsigned long con_flag) |
105 | { | |
106 | switch (con_flag) { | |
107 | case CON_FLAG_LOSSYTX: | |
108 | case CON_FLAG_KEEPALIVE_PENDING: | |
109 | case CON_FLAG_WRITE_PENDING: | |
110 | case CON_FLAG_SOCK_CLOSED: | |
111 | case CON_FLAG_BACKOFF: | |
112 | return true; | |
113 | default: | |
114 | return false; | |
115 | } | |
116 | } | |
117 | ||
118 | static void con_flag_clear(struct ceph_connection *con, unsigned long con_flag) | |
119 | { | |
120 | BUG_ON(!con_flag_valid(con_flag)); | |
121 | ||
122 | clear_bit(con_flag, &con->flags); | |
123 | } | |
124 | ||
125 | static void con_flag_set(struct ceph_connection *con, unsigned long con_flag) | |
126 | { | |
127 | BUG_ON(!con_flag_valid(con_flag)); | |
128 | ||
129 | set_bit(con_flag, &con->flags); | |
130 | } | |
131 | ||
132 | static bool con_flag_test(struct ceph_connection *con, unsigned long con_flag) | |
133 | { | |
134 | BUG_ON(!con_flag_valid(con_flag)); | |
135 | ||
136 | return test_bit(con_flag, &con->flags); | |
137 | } | |
138 | ||
139 | static bool con_flag_test_and_clear(struct ceph_connection *con, | |
140 | unsigned long con_flag) | |
141 | { | |
142 | BUG_ON(!con_flag_valid(con_flag)); | |
143 | ||
144 | return test_and_clear_bit(con_flag, &con->flags); | |
145 | } | |
146 | ||
147 | static bool con_flag_test_and_set(struct ceph_connection *con, | |
148 | unsigned long con_flag) | |
149 | { | |
150 | BUG_ON(!con_flag_valid(con_flag)); | |
151 | ||
152 | return test_and_set_bit(con_flag, &con->flags); | |
153 | } | |
154 | ||
e3d5d638 AE |
155 | /* Slab caches for frequently-allocated structures */ |
156 | ||
157 | static struct kmem_cache *ceph_msg_cache; | |
81b36be4 | 158 | static struct kmem_cache *ceph_msg_data_cache; |
e3d5d638 | 159 | |
31b8006e SW |
160 | /* static tag bytes (protocol control messages) */ |
161 | static char tag_msg = CEPH_MSGR_TAG_MSG; | |
162 | static char tag_ack = CEPH_MSGR_TAG_ACK; | |
163 | static char tag_keepalive = CEPH_MSGR_TAG_KEEPALIVE; | |
164 | ||
a6a5349d SW |
165 | #ifdef CONFIG_LOCKDEP |
166 | static struct lock_class_key socket_class; | |
167 | #endif | |
168 | ||
84495f49 AE |
169 | /* |
170 | * When skipping (ignoring) a block of input we read it into a "skip | |
171 | * buffer," which is this many bytes in size. | |
172 | */ | |
173 | #define SKIP_BUF_SIZE 1024 | |
31b8006e SW |
174 | |
175 | static void queue_con(struct ceph_connection *con); | |
176 | static void con_work(struct work_struct *); | |
93209264 | 177 | static void con_fault(struct ceph_connection *con); |
31b8006e | 178 | |
31b8006e | 179 | /* |
f64a9317 AE |
180 | * Nicely render a sockaddr as a string. An array of formatted |
181 | * strings is used, to approximate reentrancy. | |
31b8006e | 182 | */ |
f64a9317 AE |
183 | #define ADDR_STR_COUNT_LOG 5 /* log2(# address strings in array) */ |
184 | #define ADDR_STR_COUNT (1 << ADDR_STR_COUNT_LOG) | |
185 | #define ADDR_STR_COUNT_MASK (ADDR_STR_COUNT - 1) | |
186 | #define MAX_ADDR_STR_LEN 64 /* 54 is enough */ | |
187 | ||
188 | static char addr_str[ADDR_STR_COUNT][MAX_ADDR_STR_LEN]; | |
189 | static atomic_t addr_str_seq = ATOMIC_INIT(0); | |
31b8006e | 190 | |
57666519 | 191 | static struct page *zero_page; /* used in certain error cases */ |
57666519 | 192 | |
3d14c5d2 | 193 | const char *ceph_pr_addr(const struct sockaddr_storage *ss) |
31b8006e SW |
194 | { |
195 | int i; | |
196 | char *s; | |
99f0f3b2 AE |
197 | struct sockaddr_in *in4 = (struct sockaddr_in *) ss; |
198 | struct sockaddr_in6 *in6 = (struct sockaddr_in6 *) ss; | |
31b8006e | 199 | |
f64a9317 | 200 | i = atomic_inc_return(&addr_str_seq) & ADDR_STR_COUNT_MASK; |
31b8006e SW |
201 | s = addr_str[i]; |
202 | ||
203 | switch (ss->ss_family) { | |
204 | case AF_INET: | |
bd406145 AE |
205 | snprintf(s, MAX_ADDR_STR_LEN, "%pI4:%hu", &in4->sin_addr, |
206 | ntohs(in4->sin_port)); | |
31b8006e SW |
207 | break; |
208 | ||
209 | case AF_INET6: | |
bd406145 AE |
210 | snprintf(s, MAX_ADDR_STR_LEN, "[%pI6c]:%hu", &in6->sin6_addr, |
211 | ntohs(in6->sin6_port)); | |
31b8006e SW |
212 | break; |
213 | ||
214 | default: | |
d3002b97 AE |
215 | snprintf(s, MAX_ADDR_STR_LEN, "(unknown sockaddr family %hu)", |
216 | ss->ss_family); | |
31b8006e SW |
217 | } |
218 | ||
219 | return s; | |
220 | } | |
3d14c5d2 | 221 | EXPORT_SYMBOL(ceph_pr_addr); |
31b8006e | 222 | |
63f2d211 SW |
223 | static void encode_my_addr(struct ceph_messenger *msgr) |
224 | { | |
225 | memcpy(&msgr->my_enc_addr, &msgr->inst.addr, sizeof(msgr->my_enc_addr)); | |
226 | ceph_encode_addr(&msgr->my_enc_addr); | |
227 | } | |
228 | ||
31b8006e SW |
229 | /* |
230 | * work queue for all reading and writing to/from the socket. | |
231 | */ | |
e0f43c94 | 232 | static struct workqueue_struct *ceph_msgr_wq; |
31b8006e | 233 | |
e3d5d638 AE |
234 | static int ceph_msgr_slab_init(void) |
235 | { | |
236 | BUG_ON(ceph_msg_cache); | |
237 | ceph_msg_cache = kmem_cache_create("ceph_msg", | |
238 | sizeof (struct ceph_msg), | |
239 | __alignof__(struct ceph_msg), 0, NULL); | |
81b36be4 AE |
240 | |
241 | if (!ceph_msg_cache) | |
242 | return -ENOMEM; | |
243 | ||
244 | BUG_ON(ceph_msg_data_cache); | |
245 | ceph_msg_data_cache = kmem_cache_create("ceph_msg_data", | |
246 | sizeof (struct ceph_msg_data), | |
247 | __alignof__(struct ceph_msg_data), | |
248 | 0, NULL); | |
249 | if (ceph_msg_data_cache) | |
250 | return 0; | |
251 | ||
252 | kmem_cache_destroy(ceph_msg_cache); | |
253 | ceph_msg_cache = NULL; | |
254 | ||
255 | return -ENOMEM; | |
e3d5d638 AE |
256 | } |
257 | ||
258 | static void ceph_msgr_slab_exit(void) | |
259 | { | |
81b36be4 AE |
260 | BUG_ON(!ceph_msg_data_cache); |
261 | kmem_cache_destroy(ceph_msg_data_cache); | |
262 | ceph_msg_data_cache = NULL; | |
263 | ||
e3d5d638 AE |
264 | BUG_ON(!ceph_msg_cache); |
265 | kmem_cache_destroy(ceph_msg_cache); | |
266 | ceph_msg_cache = NULL; | |
267 | } | |
268 | ||
15417167 | 269 | static void _ceph_msgr_exit(void) |
6173d1f0 | 270 | { |
d3002b97 | 271 | if (ceph_msgr_wq) { |
6173d1f0 | 272 | destroy_workqueue(ceph_msgr_wq); |
d3002b97 AE |
273 | ceph_msgr_wq = NULL; |
274 | } | |
6173d1f0 | 275 | |
e3d5d638 AE |
276 | ceph_msgr_slab_exit(); |
277 | ||
6173d1f0 AE |
278 | BUG_ON(zero_page == NULL); |
279 | kunmap(zero_page); | |
280 | page_cache_release(zero_page); | |
281 | zero_page = NULL; | |
282 | } | |
283 | ||
3d14c5d2 | 284 | int ceph_msgr_init(void) |
31b8006e | 285 | { |
57666519 AE |
286 | BUG_ON(zero_page != NULL); |
287 | zero_page = ZERO_PAGE(0); | |
288 | page_cache_get(zero_page); | |
289 | ||
e3d5d638 AE |
290 | if (ceph_msgr_slab_init()) |
291 | return -ENOMEM; | |
292 | ||
f363e45f | 293 | ceph_msgr_wq = alloc_workqueue("ceph-msgr", WQ_NON_REENTRANT, 0); |
6173d1f0 AE |
294 | if (ceph_msgr_wq) |
295 | return 0; | |
57666519 | 296 | |
6173d1f0 AE |
297 | pr_err("msgr_init failed to create workqueue\n"); |
298 | _ceph_msgr_exit(); | |
57666519 | 299 | |
6173d1f0 | 300 | return -ENOMEM; |
31b8006e | 301 | } |
3d14c5d2 | 302 | EXPORT_SYMBOL(ceph_msgr_init); |
31b8006e SW |
303 | |
304 | void ceph_msgr_exit(void) | |
305 | { | |
57666519 | 306 | BUG_ON(ceph_msgr_wq == NULL); |
57666519 | 307 | |
6173d1f0 | 308 | _ceph_msgr_exit(); |
31b8006e | 309 | } |
3d14c5d2 | 310 | EXPORT_SYMBOL(ceph_msgr_exit); |
31b8006e | 311 | |
cd84db6e | 312 | void ceph_msgr_flush(void) |
a922d38f SW |
313 | { |
314 | flush_workqueue(ceph_msgr_wq); | |
315 | } | |
3d14c5d2 | 316 | EXPORT_SYMBOL(ceph_msgr_flush); |
a922d38f | 317 | |
ce2c8903 AE |
318 | /* Connection socket state transition functions */ |
319 | ||
320 | static void con_sock_state_init(struct ceph_connection *con) | |
321 | { | |
322 | int old_state; | |
323 | ||
324 | old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CLOSED); | |
325 | if (WARN_ON(old_state != CON_SOCK_STATE_NEW)) | |
326 | printk("%s: unexpected old state %d\n", __func__, old_state); | |
8007b8d6 SW |
327 | dout("%s con %p sock %d -> %d\n", __func__, con, old_state, |
328 | CON_SOCK_STATE_CLOSED); | |
ce2c8903 AE |
329 | } |
330 | ||
331 | static void con_sock_state_connecting(struct ceph_connection *con) | |
332 | { | |
333 | int old_state; | |
334 | ||
335 | old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CONNECTING); | |
336 | if (WARN_ON(old_state != CON_SOCK_STATE_CLOSED)) | |
337 | printk("%s: unexpected old state %d\n", __func__, old_state); | |
8007b8d6 SW |
338 | dout("%s con %p sock %d -> %d\n", __func__, con, old_state, |
339 | CON_SOCK_STATE_CONNECTING); | |
ce2c8903 AE |
340 | } |
341 | ||
342 | static void con_sock_state_connected(struct ceph_connection *con) | |
343 | { | |
344 | int old_state; | |
345 | ||
346 | old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CONNECTED); | |
347 | if (WARN_ON(old_state != CON_SOCK_STATE_CONNECTING)) | |
348 | printk("%s: unexpected old state %d\n", __func__, old_state); | |
8007b8d6 SW |
349 | dout("%s con %p sock %d -> %d\n", __func__, con, old_state, |
350 | CON_SOCK_STATE_CONNECTED); | |
ce2c8903 AE |
351 | } |
352 | ||
353 | static void con_sock_state_closing(struct ceph_connection *con) | |
354 | { | |
355 | int old_state; | |
356 | ||
357 | old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CLOSING); | |
358 | if (WARN_ON(old_state != CON_SOCK_STATE_CONNECTING && | |
359 | old_state != CON_SOCK_STATE_CONNECTED && | |
360 | old_state != CON_SOCK_STATE_CLOSING)) | |
361 | printk("%s: unexpected old state %d\n", __func__, old_state); | |
8007b8d6 SW |
362 | dout("%s con %p sock %d -> %d\n", __func__, con, old_state, |
363 | CON_SOCK_STATE_CLOSING); | |
ce2c8903 AE |
364 | } |
365 | ||
366 | static void con_sock_state_closed(struct ceph_connection *con) | |
367 | { | |
368 | int old_state; | |
369 | ||
370 | old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CLOSED); | |
371 | if (WARN_ON(old_state != CON_SOCK_STATE_CONNECTED && | |
fbb85a47 | 372 | old_state != CON_SOCK_STATE_CLOSING && |
8007b8d6 SW |
373 | old_state != CON_SOCK_STATE_CONNECTING && |
374 | old_state != CON_SOCK_STATE_CLOSED)) | |
ce2c8903 | 375 | printk("%s: unexpected old state %d\n", __func__, old_state); |
8007b8d6 SW |
376 | dout("%s con %p sock %d -> %d\n", __func__, con, old_state, |
377 | CON_SOCK_STATE_CLOSED); | |
ce2c8903 | 378 | } |
a922d38f | 379 | |
31b8006e SW |
380 | /* |
381 | * socket callback functions | |
382 | */ | |
383 | ||
384 | /* data available on socket, or listen socket received a connect */ | |
327800bd | 385 | static void ceph_sock_data_ready(struct sock *sk, int count_unused) |
31b8006e | 386 | { |
bd406145 | 387 | struct ceph_connection *con = sk->sk_user_data; |
a2a32584 GH |
388 | if (atomic_read(&con->msgr->stopping)) { |
389 | return; | |
390 | } | |
bd406145 | 391 | |
31b8006e | 392 | if (sk->sk_state != TCP_CLOSE_WAIT) { |
327800bd | 393 | dout("%s on %p state = %lu, queueing work\n", __func__, |
31b8006e SW |
394 | con, con->state); |
395 | queue_con(con); | |
396 | } | |
397 | } | |
398 | ||
399 | /* socket has buffer space for writing */ | |
327800bd | 400 | static void ceph_sock_write_space(struct sock *sk) |
31b8006e | 401 | { |
d3002b97 | 402 | struct ceph_connection *con = sk->sk_user_data; |
31b8006e | 403 | |
182fac26 JS |
404 | /* only queue to workqueue if there is data we want to write, |
405 | * and there is sufficient space in the socket buffer to accept | |
327800bd | 406 | * more data. clear SOCK_NOSPACE so that ceph_sock_write_space() |
182fac26 JS |
407 | * doesn't get called again until try_write() fills the socket |
408 | * buffer. See net/ipv4/tcp_input.c:tcp_check_space() | |
409 | * and net/core/stream.c:sk_stream_write_space(). | |
410 | */ | |
c9ffc77a | 411 | if (con_flag_test(con, CON_FLAG_WRITE_PENDING)) { |
182fac26 | 412 | if (sk_stream_wspace(sk) >= sk_stream_min_wspace(sk)) { |
327800bd | 413 | dout("%s %p queueing write work\n", __func__, con); |
182fac26 JS |
414 | clear_bit(SOCK_NOSPACE, &sk->sk_socket->flags); |
415 | queue_con(con); | |
416 | } | |
31b8006e | 417 | } else { |
327800bd | 418 | dout("%s %p nothing to write\n", __func__, con); |
31b8006e | 419 | } |
31b8006e SW |
420 | } |
421 | ||
422 | /* socket's state has changed */ | |
327800bd | 423 | static void ceph_sock_state_change(struct sock *sk) |
31b8006e | 424 | { |
bd406145 | 425 | struct ceph_connection *con = sk->sk_user_data; |
31b8006e | 426 | |
327800bd | 427 | dout("%s %p state = %lu sk_state = %u\n", __func__, |
31b8006e SW |
428 | con, con->state, sk->sk_state); |
429 | ||
31b8006e SW |
430 | switch (sk->sk_state) { |
431 | case TCP_CLOSE: | |
327800bd | 432 | dout("%s TCP_CLOSE\n", __func__); |
31b8006e | 433 | case TCP_CLOSE_WAIT: |
327800bd | 434 | dout("%s TCP_CLOSE_WAIT\n", __func__); |
ce2c8903 | 435 | con_sock_state_closing(con); |
c9ffc77a | 436 | con_flag_set(con, CON_FLAG_SOCK_CLOSED); |
d65c9e0b | 437 | queue_con(con); |
31b8006e SW |
438 | break; |
439 | case TCP_ESTABLISHED: | |
327800bd | 440 | dout("%s TCP_ESTABLISHED\n", __func__); |
ce2c8903 | 441 | con_sock_state_connected(con); |
31b8006e SW |
442 | queue_con(con); |
443 | break; | |
d3002b97 AE |
444 | default: /* Everything else is uninteresting */ |
445 | break; | |
31b8006e SW |
446 | } |
447 | } | |
448 | ||
449 | /* | |
450 | * set up socket callbacks | |
451 | */ | |
452 | static void set_sock_callbacks(struct socket *sock, | |
453 | struct ceph_connection *con) | |
454 | { | |
455 | struct sock *sk = sock->sk; | |
bd406145 | 456 | sk->sk_user_data = con; |
327800bd AE |
457 | sk->sk_data_ready = ceph_sock_data_ready; |
458 | sk->sk_write_space = ceph_sock_write_space; | |
459 | sk->sk_state_change = ceph_sock_state_change; | |
31b8006e SW |
460 | } |
461 | ||
462 | ||
463 | /* | |
464 | * socket helpers | |
465 | */ | |
466 | ||
467 | /* | |
468 | * initiate connection to a remote socket. | |
469 | */ | |
41617d0c | 470 | static int ceph_tcp_connect(struct ceph_connection *con) |
31b8006e | 471 | { |
f91d3471 | 472 | struct sockaddr_storage *paddr = &con->peer_addr.in_addr; |
31b8006e SW |
473 | struct socket *sock; |
474 | int ret; | |
475 | ||
476 | BUG_ON(con->sock); | |
f91d3471 SW |
477 | ret = sock_create_kern(con->peer_addr.in_addr.ss_family, SOCK_STREAM, |
478 | IPPROTO_TCP, &sock); | |
31b8006e | 479 | if (ret) |
41617d0c | 480 | return ret; |
31b8006e SW |
481 | sock->sk->sk_allocation = GFP_NOFS; |
482 | ||
a6a5349d SW |
483 | #ifdef CONFIG_LOCKDEP |
484 | lockdep_set_class(&sock->sk->sk_lock, &socket_class); | |
485 | #endif | |
486 | ||
31b8006e SW |
487 | set_sock_callbacks(sock, con); |
488 | ||
3d14c5d2 | 489 | dout("connect %s\n", ceph_pr_addr(&con->peer_addr.in_addr)); |
31b8006e | 490 | |
89a86be0 | 491 | con_sock_state_connecting(con); |
f91d3471 SW |
492 | ret = sock->ops->connect(sock, (struct sockaddr *)paddr, sizeof(*paddr), |
493 | O_NONBLOCK); | |
31b8006e SW |
494 | if (ret == -EINPROGRESS) { |
495 | dout("connect %s EINPROGRESS sk_state = %u\n", | |
3d14c5d2 | 496 | ceph_pr_addr(&con->peer_addr.in_addr), |
31b8006e | 497 | sock->sk->sk_state); |
a5bc3129 | 498 | } else if (ret < 0) { |
31b8006e | 499 | pr_err("connect %s error %d\n", |
3d14c5d2 | 500 | ceph_pr_addr(&con->peer_addr.in_addr), ret); |
31b8006e | 501 | sock_release(sock); |
31b8006e | 502 | con->error_msg = "connect error"; |
31b8006e | 503 | |
41617d0c | 504 | return ret; |
a5bc3129 AE |
505 | } |
506 | con->sock = sock; | |
41617d0c | 507 | return 0; |
31b8006e SW |
508 | } |
509 | ||
510 | static int ceph_tcp_recvmsg(struct socket *sock, void *buf, size_t len) | |
511 | { | |
512 | struct kvec iov = {buf, len}; | |
513 | struct msghdr msg = { .msg_flags = MSG_DONTWAIT | MSG_NOSIGNAL }; | |
98bdb0aa | 514 | int r; |
31b8006e | 515 | |
98bdb0aa SW |
516 | r = kernel_recvmsg(sock, &msg, &iov, 1, len, msg.msg_flags); |
517 | if (r == -EAGAIN) | |
518 | r = 0; | |
519 | return r; | |
31b8006e SW |
520 | } |
521 | ||
afb3d90e AE |
522 | static int ceph_tcp_recvpage(struct socket *sock, struct page *page, |
523 | int page_offset, size_t length) | |
524 | { | |
525 | void *kaddr; | |
526 | int ret; | |
527 | ||
528 | BUG_ON(page_offset + length > PAGE_SIZE); | |
529 | ||
530 | kaddr = kmap(page); | |
531 | BUG_ON(!kaddr); | |
532 | ret = ceph_tcp_recvmsg(sock, kaddr + page_offset, length); | |
533 | kunmap(page); | |
534 | ||
535 | return ret; | |
536 | } | |
537 | ||
31b8006e SW |
538 | /* |
539 | * write something. @more is true if caller will be sending more data | |
540 | * shortly. | |
541 | */ | |
542 | static int ceph_tcp_sendmsg(struct socket *sock, struct kvec *iov, | |
543 | size_t kvlen, size_t len, int more) | |
544 | { | |
545 | struct msghdr msg = { .msg_flags = MSG_DONTWAIT | MSG_NOSIGNAL }; | |
42961d23 | 546 | int r; |
31b8006e SW |
547 | |
548 | if (more) | |
549 | msg.msg_flags |= MSG_MORE; | |
550 | else | |
551 | msg.msg_flags |= MSG_EOR; /* superfluous, but what the hell */ | |
552 | ||
42961d23 SW |
553 | r = kernel_sendmsg(sock, &msg, iov, kvlen, len); |
554 | if (r == -EAGAIN) | |
555 | r = 0; | |
556 | return r; | |
31b8006e SW |
557 | } |
558 | ||
a757a4e2 | 559 | static int __ceph_tcp_sendpage(struct socket *sock, struct page *page, |
e1dcb128 | 560 | int offset, size_t size, bool more) |
31739139 AE |
561 | { |
562 | int flags = MSG_DONTWAIT | MSG_NOSIGNAL | (more ? MSG_MORE : MSG_EOR); | |
563 | int ret; | |
564 | ||
565 | ret = kernel_sendpage(sock, page, offset, size, flags); | |
566 | if (ret == -EAGAIN) | |
567 | ret = 0; | |
568 | ||
569 | return ret; | |
570 | } | |
571 | ||
a757a4e2 CC |
572 | static int ceph_tcp_sendpage(struct socket *sock, struct page *page, |
573 | int offset, size_t size, bool more) | |
574 | { | |
575 | int ret; | |
576 | struct kvec iov; | |
577 | ||
578 | /* sendpage cannot properly handle pages with page_count == 0, | |
579 | * we need to fallback to sendmsg if that's the case */ | |
580 | if (page_count(page) >= 1) | |
581 | return __ceph_tcp_sendpage(sock, page, offset, size, more); | |
582 | ||
583 | iov.iov_base = kmap(page) + offset; | |
584 | iov.iov_len = size; | |
585 | ret = ceph_tcp_sendmsg(sock, &iov, 1, size, more); | |
586 | kunmap(page); | |
587 | ||
588 | return ret; | |
589 | } | |
31b8006e SW |
590 | |
591 | /* | |
592 | * Shutdown/close the socket for the given connection. | |
593 | */ | |
594 | static int con_close_socket(struct ceph_connection *con) | |
595 | { | |
8007b8d6 | 596 | int rc = 0; |
31b8006e SW |
597 | |
598 | dout("con_close_socket on %p sock %p\n", con, con->sock); | |
8007b8d6 SW |
599 | if (con->sock) { |
600 | rc = con->sock->ops->shutdown(con->sock, SHUT_RDWR); | |
601 | sock_release(con->sock); | |
602 | con->sock = NULL; | |
603 | } | |
456ea468 AE |
604 | |
605 | /* | |
4a861692 | 606 | * Forcibly clear the SOCK_CLOSED flag. It gets set |
456ea468 AE |
607 | * independent of the connection mutex, and we could have |
608 | * received a socket close event before we had the chance to | |
609 | * shut the socket down. | |
610 | */ | |
c9ffc77a | 611 | con_flag_clear(con, CON_FLAG_SOCK_CLOSED); |
8007b8d6 | 612 | |
ce2c8903 | 613 | con_sock_state_closed(con); |
31b8006e SW |
614 | return rc; |
615 | } | |
616 | ||
617 | /* | |
618 | * Reset a connection. Discard all incoming and outgoing messages | |
619 | * and clear *_seq state. | |
620 | */ | |
621 | static void ceph_msg_remove(struct ceph_msg *msg) | |
622 | { | |
623 | list_del_init(&msg->list_head); | |
38941f80 | 624 | BUG_ON(msg->con == NULL); |
36eb71aa | 625 | msg->con->ops->put(msg->con); |
38941f80 AE |
626 | msg->con = NULL; |
627 | ||
31b8006e SW |
628 | ceph_msg_put(msg); |
629 | } | |
630 | static void ceph_msg_remove_list(struct list_head *head) | |
631 | { | |
632 | while (!list_empty(head)) { | |
633 | struct ceph_msg *msg = list_first_entry(head, struct ceph_msg, | |
634 | list_head); | |
635 | ceph_msg_remove(msg); | |
636 | } | |
637 | } | |
638 | ||
639 | static void reset_connection(struct ceph_connection *con) | |
640 | { | |
641 | /* reset connection, out_queue, msg_ and connect_seq */ | |
642 | /* discard existing out_queue and msg_seq */ | |
0fa6ebc6 | 643 | dout("reset_connection %p\n", con); |
31b8006e SW |
644 | ceph_msg_remove_list(&con->out_queue); |
645 | ceph_msg_remove_list(&con->out_sent); | |
646 | ||
cf3e5c40 | 647 | if (con->in_msg) { |
38941f80 AE |
648 | BUG_ON(con->in_msg->con != con); |
649 | con->in_msg->con = NULL; | |
cf3e5c40 SW |
650 | ceph_msg_put(con->in_msg); |
651 | con->in_msg = NULL; | |
36eb71aa | 652 | con->ops->put(con); |
cf3e5c40 SW |
653 | } |
654 | ||
31b8006e SW |
655 | con->connect_seq = 0; |
656 | con->out_seq = 0; | |
c86a2930 SW |
657 | if (con->out_msg) { |
658 | ceph_msg_put(con->out_msg); | |
659 | con->out_msg = NULL; | |
660 | } | |
31b8006e | 661 | con->in_seq = 0; |
0e0d5e0c | 662 | con->in_seq_acked = 0; |
31b8006e SW |
663 | } |
664 | ||
665 | /* | |
666 | * mark a peer down. drop any open connections. | |
667 | */ | |
668 | void ceph_con_close(struct ceph_connection *con) | |
669 | { | |
8c50c817 | 670 | mutex_lock(&con->mutex); |
3d14c5d2 YS |
671 | dout("con_close %p peer %s\n", con, |
672 | ceph_pr_addr(&con->peer_addr.in_addr)); | |
8dacc7da | 673 | con->state = CON_STATE_CLOSED; |
a5988c49 | 674 | |
c9ffc77a AE |
675 | con_flag_clear(con, CON_FLAG_LOSSYTX); /* so we retry next connect */ |
676 | con_flag_clear(con, CON_FLAG_KEEPALIVE_PENDING); | |
677 | con_flag_clear(con, CON_FLAG_WRITE_PENDING); | |
678 | con_flag_clear(con, CON_FLAG_BACKOFF); | |
a5988c49 | 679 | |
31b8006e | 680 | reset_connection(con); |
6f2bc3ff | 681 | con->peer_global_seq = 0; |
91e45ce3 | 682 | cancel_delayed_work(&con->work); |
ee76e073 | 683 | con_close_socket(con); |
ec302645 | 684 | mutex_unlock(&con->mutex); |
31b8006e | 685 | } |
3d14c5d2 | 686 | EXPORT_SYMBOL(ceph_con_close); |
31b8006e | 687 | |
31b8006e SW |
688 | /* |
689 | * Reopen a closed connection, with a new peer address. | |
690 | */ | |
b7a9e5dd SW |
691 | void ceph_con_open(struct ceph_connection *con, |
692 | __u8 entity_type, __u64 entity_num, | |
693 | struct ceph_entity_addr *addr) | |
31b8006e | 694 | { |
5469155f | 695 | mutex_lock(&con->mutex); |
3d14c5d2 | 696 | dout("con_open %p %s\n", con, ceph_pr_addr(&addr->in_addr)); |
8dacc7da | 697 | |
122070a2 | 698 | WARN_ON(con->state != CON_STATE_CLOSED); |
8dacc7da | 699 | con->state = CON_STATE_PREOPEN; |
a5988c49 | 700 | |
b7a9e5dd SW |
701 | con->peer_name.type = (__u8) entity_type; |
702 | con->peer_name.num = cpu_to_le64(entity_num); | |
703 | ||
31b8006e | 704 | memcpy(&con->peer_addr, addr, sizeof(*addr)); |
03c677e1 | 705 | con->delay = 0; /* reset backoff memory */ |
5469155f | 706 | mutex_unlock(&con->mutex); |
31b8006e SW |
707 | queue_con(con); |
708 | } | |
3d14c5d2 | 709 | EXPORT_SYMBOL(ceph_con_open); |
31b8006e | 710 | |
87b315a5 SW |
711 | /* |
712 | * return true if this connection ever successfully opened | |
713 | */ | |
714 | bool ceph_con_opened(struct ceph_connection *con) | |
715 | { | |
716 | return con->connect_seq > 0; | |
717 | } | |
718 | ||
31b8006e SW |
719 | /* |
720 | * initialize a new connection. | |
721 | */ | |
1bfd89f4 AE |
722 | void ceph_con_init(struct ceph_connection *con, void *private, |
723 | const struct ceph_connection_operations *ops, | |
b7a9e5dd | 724 | struct ceph_messenger *msgr) |
31b8006e SW |
725 | { |
726 | dout("con_init %p\n", con); | |
727 | memset(con, 0, sizeof(*con)); | |
1bfd89f4 AE |
728 | con->private = private; |
729 | con->ops = ops; | |
31b8006e | 730 | con->msgr = msgr; |
ce2c8903 AE |
731 | |
732 | con_sock_state_init(con); | |
733 | ||
ec302645 | 734 | mutex_init(&con->mutex); |
31b8006e SW |
735 | INIT_LIST_HEAD(&con->out_queue); |
736 | INIT_LIST_HEAD(&con->out_sent); | |
737 | INIT_DELAYED_WORK(&con->work, con_work); | |
a5988c49 | 738 | |
8dacc7da | 739 | con->state = CON_STATE_CLOSED; |
31b8006e | 740 | } |
3d14c5d2 | 741 | EXPORT_SYMBOL(ceph_con_init); |
31b8006e SW |
742 | |
743 | ||
744 | /* | |
745 | * We maintain a global counter to order connection attempts. Get | |
746 | * a unique seq greater than @gt. | |
747 | */ | |
748 | static u32 get_global_seq(struct ceph_messenger *msgr, u32 gt) | |
749 | { | |
750 | u32 ret; | |
751 | ||
752 | spin_lock(&msgr->global_seq_lock); | |
753 | if (msgr->global_seq < gt) | |
754 | msgr->global_seq = gt; | |
755 | ret = ++msgr->global_seq; | |
756 | spin_unlock(&msgr->global_seq_lock); | |
757 | return ret; | |
758 | } | |
759 | ||
e2200423 | 760 | static void con_out_kvec_reset(struct ceph_connection *con) |
859eb799 AE |
761 | { |
762 | con->out_kvec_left = 0; | |
763 | con->out_kvec_bytes = 0; | |
764 | con->out_kvec_cur = &con->out_kvec[0]; | |
765 | } | |
766 | ||
e2200423 | 767 | static void con_out_kvec_add(struct ceph_connection *con, |
859eb799 AE |
768 | size_t size, void *data) |
769 | { | |
770 | int index; | |
771 | ||
772 | index = con->out_kvec_left; | |
773 | BUG_ON(index >= ARRAY_SIZE(con->out_kvec)); | |
774 | ||
775 | con->out_kvec[index].iov_len = size; | |
776 | con->out_kvec[index].iov_base = data; | |
777 | con->out_kvec_left++; | |
778 | con->out_kvec_bytes += size; | |
779 | } | |
31b8006e | 780 | |
df6ad1f9 | 781 | #ifdef CONFIG_BLOCK |
6aaa4511 AE |
782 | |
783 | /* | |
784 | * For a bio data item, a piece is whatever remains of the next | |
785 | * entry in the current bio iovec, or the first entry in the next | |
786 | * bio in the list. | |
787 | */ | |
8ae4f4f5 | 788 | static void ceph_msg_data_bio_cursor_init(struct ceph_msg_data_cursor *cursor, |
25aff7c5 | 789 | size_t length) |
6aaa4511 | 790 | { |
8ae4f4f5 | 791 | struct ceph_msg_data *data = cursor->data; |
6aaa4511 AE |
792 | struct bio *bio; |
793 | ||
794 | BUG_ON(data->type != CEPH_MSG_DATA_BIO); | |
795 | ||
796 | bio = data->bio; | |
797 | BUG_ON(!bio); | |
798 | BUG_ON(!bio->bi_vcnt); | |
6aaa4511 | 799 | |
ca8b3a69 | 800 | cursor->resid = min(length, data->bio_length); |
6aaa4511 AE |
801 | cursor->bio = bio; |
802 | cursor->vector_index = 0; | |
803 | cursor->vector_offset = 0; | |
25aff7c5 | 804 | cursor->last_piece = length <= bio->bi_io_vec[0].bv_len; |
6aaa4511 AE |
805 | } |
806 | ||
8ae4f4f5 | 807 | static struct page *ceph_msg_data_bio_next(struct ceph_msg_data_cursor *cursor, |
6aaa4511 AE |
808 | size_t *page_offset, |
809 | size_t *length) | |
810 | { | |
8ae4f4f5 | 811 | struct ceph_msg_data *data = cursor->data; |
6aaa4511 AE |
812 | struct bio *bio; |
813 | struct bio_vec *bio_vec; | |
814 | unsigned int index; | |
815 | ||
816 | BUG_ON(data->type != CEPH_MSG_DATA_BIO); | |
817 | ||
818 | bio = cursor->bio; | |
819 | BUG_ON(!bio); | |
820 | ||
821 | index = cursor->vector_index; | |
822 | BUG_ON(index >= (unsigned int) bio->bi_vcnt); | |
823 | ||
824 | bio_vec = &bio->bi_io_vec[index]; | |
825 | BUG_ON(cursor->vector_offset >= bio_vec->bv_len); | |
826 | *page_offset = (size_t) (bio_vec->bv_offset + cursor->vector_offset); | |
827 | BUG_ON(*page_offset >= PAGE_SIZE); | |
25aff7c5 AE |
828 | if (cursor->last_piece) /* pagelist offset is always 0 */ |
829 | *length = cursor->resid; | |
830 | else | |
831 | *length = (size_t) (bio_vec->bv_len - cursor->vector_offset); | |
25aff7c5 | 832 | BUG_ON(*length > cursor->resid); |
5df521b1 | 833 | BUG_ON(*page_offset + *length > PAGE_SIZE); |
6aaa4511 AE |
834 | |
835 | return bio_vec->bv_page; | |
836 | } | |
837 | ||
8ae4f4f5 AE |
838 | static bool ceph_msg_data_bio_advance(struct ceph_msg_data_cursor *cursor, |
839 | size_t bytes) | |
6aaa4511 | 840 | { |
6aaa4511 AE |
841 | struct bio *bio; |
842 | struct bio_vec *bio_vec; | |
843 | unsigned int index; | |
844 | ||
8ae4f4f5 | 845 | BUG_ON(cursor->data->type != CEPH_MSG_DATA_BIO); |
6aaa4511 AE |
846 | |
847 | bio = cursor->bio; | |
848 | BUG_ON(!bio); | |
849 | ||
850 | index = cursor->vector_index; | |
851 | BUG_ON(index >= (unsigned int) bio->bi_vcnt); | |
852 | bio_vec = &bio->bi_io_vec[index]; | |
6aaa4511 AE |
853 | |
854 | /* Advance the cursor offset */ | |
855 | ||
25aff7c5 AE |
856 | BUG_ON(cursor->resid < bytes); |
857 | cursor->resid -= bytes; | |
6aaa4511 AE |
858 | cursor->vector_offset += bytes; |
859 | if (cursor->vector_offset < bio_vec->bv_len) | |
860 | return false; /* more bytes to process in this segment */ | |
25aff7c5 | 861 | BUG_ON(cursor->vector_offset != bio_vec->bv_len); |
6aaa4511 AE |
862 | |
863 | /* Move on to the next segment, and possibly the next bio */ | |
864 | ||
25aff7c5 | 865 | if (++index == (unsigned int) bio->bi_vcnt) { |
6aaa4511 | 866 | bio = bio->bi_next; |
25aff7c5 | 867 | index = 0; |
6aaa4511 | 868 | } |
25aff7c5 AE |
869 | cursor->bio = bio; |
870 | cursor->vector_index = index; | |
6aaa4511 AE |
871 | cursor->vector_offset = 0; |
872 | ||
25aff7c5 AE |
873 | if (!cursor->last_piece) { |
874 | BUG_ON(!cursor->resid); | |
875 | BUG_ON(!bio); | |
876 | /* A short read is OK, so use <= rather than == */ | |
877 | if (cursor->resid <= bio->bi_io_vec[index].bv_len) | |
6aaa4511 | 878 | cursor->last_piece = true; |
25aff7c5 | 879 | } |
6aaa4511 AE |
880 | |
881 | return true; | |
882 | } | |
ea96571f | 883 | #endif /* CONFIG_BLOCK */ |
df6ad1f9 | 884 | |
e766d7b5 AE |
885 | /* |
886 | * For a page array, a piece comes from the first page in the array | |
887 | * that has not already been fully consumed. | |
888 | */ | |
8ae4f4f5 | 889 | static void ceph_msg_data_pages_cursor_init(struct ceph_msg_data_cursor *cursor, |
25aff7c5 | 890 | size_t length) |
e766d7b5 | 891 | { |
8ae4f4f5 | 892 | struct ceph_msg_data *data = cursor->data; |
e766d7b5 AE |
893 | int page_count; |
894 | ||
895 | BUG_ON(data->type != CEPH_MSG_DATA_PAGES); | |
896 | ||
897 | BUG_ON(!data->pages); | |
898 | BUG_ON(!data->length); | |
899 | ||
ca8b3a69 | 900 | cursor->resid = min(length, data->length); |
e766d7b5 | 901 | page_count = calc_pages_for(data->alignment, (u64)data->length); |
e766d7b5 AE |
902 | cursor->page_offset = data->alignment & ~PAGE_MASK; |
903 | cursor->page_index = 0; | |
56fc5659 AE |
904 | BUG_ON(page_count > (int)USHRT_MAX); |
905 | cursor->page_count = (unsigned short)page_count; | |
906 | BUG_ON(length > SIZE_MAX - cursor->page_offset); | |
a6489727 | 907 | cursor->last_piece = cursor->page_offset + cursor->resid <= PAGE_SIZE; |
e766d7b5 AE |
908 | } |
909 | ||
8ae4f4f5 AE |
910 | static struct page * |
911 | ceph_msg_data_pages_next(struct ceph_msg_data_cursor *cursor, | |
912 | size_t *page_offset, size_t *length) | |
e766d7b5 | 913 | { |
8ae4f4f5 | 914 | struct ceph_msg_data *data = cursor->data; |
e766d7b5 AE |
915 | |
916 | BUG_ON(data->type != CEPH_MSG_DATA_PAGES); | |
917 | ||
918 | BUG_ON(cursor->page_index >= cursor->page_count); | |
919 | BUG_ON(cursor->page_offset >= PAGE_SIZE); | |
e766d7b5 AE |
920 | |
921 | *page_offset = cursor->page_offset; | |
25aff7c5 | 922 | if (cursor->last_piece) |
e766d7b5 | 923 | *length = cursor->resid; |
25aff7c5 | 924 | else |
e766d7b5 | 925 | *length = PAGE_SIZE - *page_offset; |
e766d7b5 AE |
926 | |
927 | return data->pages[cursor->page_index]; | |
928 | } | |
929 | ||
8ae4f4f5 | 930 | static bool ceph_msg_data_pages_advance(struct ceph_msg_data_cursor *cursor, |
e766d7b5 AE |
931 | size_t bytes) |
932 | { | |
8ae4f4f5 | 933 | BUG_ON(cursor->data->type != CEPH_MSG_DATA_PAGES); |
e766d7b5 AE |
934 | |
935 | BUG_ON(cursor->page_offset + bytes > PAGE_SIZE); | |
e766d7b5 AE |
936 | |
937 | /* Advance the cursor page offset */ | |
938 | ||
939 | cursor->resid -= bytes; | |
5df521b1 AE |
940 | cursor->page_offset = (cursor->page_offset + bytes) & ~PAGE_MASK; |
941 | if (!bytes || cursor->page_offset) | |
e766d7b5 AE |
942 | return false; /* more bytes to process in the current page */ |
943 | ||
5df521b1 | 944 | /* Move on to the next page; offset is already at 0 */ |
e766d7b5 AE |
945 | |
946 | BUG_ON(cursor->page_index >= cursor->page_count); | |
e766d7b5 | 947 | cursor->page_index++; |
25aff7c5 | 948 | cursor->last_piece = cursor->resid <= PAGE_SIZE; |
e766d7b5 AE |
949 | |
950 | return true; | |
951 | } | |
952 | ||
fe38a2b6 | 953 | /* |
dd236fcb AE |
954 | * For a pagelist, a piece is whatever remains to be consumed in the |
955 | * first page in the list, or the front of the next page. | |
fe38a2b6 | 956 | */ |
8ae4f4f5 AE |
957 | static void |
958 | ceph_msg_data_pagelist_cursor_init(struct ceph_msg_data_cursor *cursor, | |
25aff7c5 | 959 | size_t length) |
fe38a2b6 | 960 | { |
8ae4f4f5 | 961 | struct ceph_msg_data *data = cursor->data; |
fe38a2b6 AE |
962 | struct ceph_pagelist *pagelist; |
963 | struct page *page; | |
964 | ||
dd236fcb | 965 | BUG_ON(data->type != CEPH_MSG_DATA_PAGELIST); |
fe38a2b6 AE |
966 | |
967 | pagelist = data->pagelist; | |
968 | BUG_ON(!pagelist); | |
25aff7c5 AE |
969 | |
970 | if (!length) | |
fe38a2b6 AE |
971 | return; /* pagelist can be assigned but empty */ |
972 | ||
973 | BUG_ON(list_empty(&pagelist->head)); | |
974 | page = list_first_entry(&pagelist->head, struct page, lru); | |
975 | ||
ca8b3a69 | 976 | cursor->resid = min(length, pagelist->length); |
fe38a2b6 AE |
977 | cursor->page = page; |
978 | cursor->offset = 0; | |
a51b272e | 979 | cursor->last_piece = cursor->resid <= PAGE_SIZE; |
fe38a2b6 AE |
980 | } |
981 | ||
8ae4f4f5 AE |
982 | static struct page * |
983 | ceph_msg_data_pagelist_next(struct ceph_msg_data_cursor *cursor, | |
984 | size_t *page_offset, size_t *length) | |
fe38a2b6 | 985 | { |
8ae4f4f5 | 986 | struct ceph_msg_data *data = cursor->data; |
fe38a2b6 | 987 | struct ceph_pagelist *pagelist; |
fe38a2b6 AE |
988 | |
989 | BUG_ON(data->type != CEPH_MSG_DATA_PAGELIST); | |
990 | ||
991 | pagelist = data->pagelist; | |
992 | BUG_ON(!pagelist); | |
993 | ||
994 | BUG_ON(!cursor->page); | |
25aff7c5 | 995 | BUG_ON(cursor->offset + cursor->resid != pagelist->length); |
fe38a2b6 | 996 | |
5df521b1 | 997 | /* offset of first page in pagelist is always 0 */ |
fe38a2b6 | 998 | *page_offset = cursor->offset & ~PAGE_MASK; |
5df521b1 | 999 | if (cursor->last_piece) |
25aff7c5 AE |
1000 | *length = cursor->resid; |
1001 | else | |
1002 | *length = PAGE_SIZE - *page_offset; | |
fe38a2b6 | 1003 | |
8ae4f4f5 | 1004 | return cursor->page; |
fe38a2b6 AE |
1005 | } |
1006 | ||
8ae4f4f5 | 1007 | static bool ceph_msg_data_pagelist_advance(struct ceph_msg_data_cursor *cursor, |
dd236fcb | 1008 | size_t bytes) |
fe38a2b6 | 1009 | { |
8ae4f4f5 | 1010 | struct ceph_msg_data *data = cursor->data; |
fe38a2b6 AE |
1011 | struct ceph_pagelist *pagelist; |
1012 | ||
1013 | BUG_ON(data->type != CEPH_MSG_DATA_PAGELIST); | |
1014 | ||
1015 | pagelist = data->pagelist; | |
1016 | BUG_ON(!pagelist); | |
25aff7c5 AE |
1017 | |
1018 | BUG_ON(cursor->offset + cursor->resid != pagelist->length); | |
fe38a2b6 AE |
1019 | BUG_ON((cursor->offset & ~PAGE_MASK) + bytes > PAGE_SIZE); |
1020 | ||
1021 | /* Advance the cursor offset */ | |
1022 | ||
25aff7c5 | 1023 | cursor->resid -= bytes; |
fe38a2b6 | 1024 | cursor->offset += bytes; |
5df521b1 | 1025 | /* offset of first page in pagelist is always 0 */ |
fe38a2b6 AE |
1026 | if (!bytes || cursor->offset & ~PAGE_MASK) |
1027 | return false; /* more bytes to process in the current page */ | |
1028 | ||
1029 | /* Move on to the next page */ | |
1030 | ||
1031 | BUG_ON(list_is_last(&cursor->page->lru, &pagelist->head)); | |
1032 | cursor->page = list_entry_next(cursor->page, lru); | |
25aff7c5 | 1033 | cursor->last_piece = cursor->resid <= PAGE_SIZE; |
fe38a2b6 AE |
1034 | |
1035 | return true; | |
1036 | } | |
1037 | ||
dd236fcb AE |
1038 | /* |
1039 | * Message data is handled (sent or received) in pieces, where each | |
1040 | * piece resides on a single page. The network layer might not | |
1041 | * consume an entire piece at once. A data item's cursor keeps | |
1042 | * track of which piece is next to process and how much remains to | |
1043 | * be processed in that piece. It also tracks whether the current | |
1044 | * piece is the last one in the data item. | |
1045 | */ | |
ca8b3a69 | 1046 | static void __ceph_msg_data_cursor_init(struct ceph_msg_data_cursor *cursor) |
dd236fcb | 1047 | { |
ca8b3a69 | 1048 | size_t length = cursor->total_resid; |
8ae4f4f5 | 1049 | |
8ae4f4f5 | 1050 | switch (cursor->data->type) { |
dd236fcb | 1051 | case CEPH_MSG_DATA_PAGELIST: |
8ae4f4f5 | 1052 | ceph_msg_data_pagelist_cursor_init(cursor, length); |
dd236fcb | 1053 | break; |
e766d7b5 | 1054 | case CEPH_MSG_DATA_PAGES: |
8ae4f4f5 | 1055 | ceph_msg_data_pages_cursor_init(cursor, length); |
e766d7b5 | 1056 | break; |
dd236fcb AE |
1057 | #ifdef CONFIG_BLOCK |
1058 | case CEPH_MSG_DATA_BIO: | |
8ae4f4f5 | 1059 | ceph_msg_data_bio_cursor_init(cursor, length); |
6aaa4511 | 1060 | break; |
dd236fcb | 1061 | #endif /* CONFIG_BLOCK */ |
6aaa4511 | 1062 | case CEPH_MSG_DATA_NONE: |
dd236fcb AE |
1063 | default: |
1064 | /* BUG(); */ | |
1065 | break; | |
1066 | } | |
8ae4f4f5 | 1067 | cursor->need_crc = true; |
dd236fcb AE |
1068 | } |
1069 | ||
ca8b3a69 AE |
1070 | static void ceph_msg_data_cursor_init(struct ceph_msg *msg, size_t length) |
1071 | { | |
1072 | struct ceph_msg_data_cursor *cursor = &msg->cursor; | |
1073 | struct ceph_msg_data *data; | |
1074 | ||
1075 | BUG_ON(!length); | |
1076 | BUG_ON(length > msg->data_length); | |
1077 | BUG_ON(list_empty(&msg->data)); | |
1078 | ||
ca8b3a69 AE |
1079 | cursor->data_head = &msg->data; |
1080 | cursor->total_resid = length; | |
1081 | data = list_first_entry(&msg->data, struct ceph_msg_data, links); | |
1082 | cursor->data = data; | |
1083 | ||
1084 | __ceph_msg_data_cursor_init(cursor); | |
1085 | } | |
1086 | ||
dd236fcb AE |
1087 | /* |
1088 | * Return the page containing the next piece to process for a given | |
1089 | * data item, and supply the page offset and length of that piece. | |
1090 | * Indicate whether this is the last piece in this data item. | |
1091 | */ | |
8ae4f4f5 AE |
1092 | static struct page *ceph_msg_data_next(struct ceph_msg_data_cursor *cursor, |
1093 | size_t *page_offset, size_t *length, | |
dd236fcb AE |
1094 | bool *last_piece) |
1095 | { | |
1096 | struct page *page; | |
1097 | ||
8ae4f4f5 | 1098 | switch (cursor->data->type) { |
dd236fcb | 1099 | case CEPH_MSG_DATA_PAGELIST: |
8ae4f4f5 | 1100 | page = ceph_msg_data_pagelist_next(cursor, page_offset, length); |
dd236fcb | 1101 | break; |
e766d7b5 | 1102 | case CEPH_MSG_DATA_PAGES: |
8ae4f4f5 | 1103 | page = ceph_msg_data_pages_next(cursor, page_offset, length); |
e766d7b5 | 1104 | break; |
dd236fcb AE |
1105 | #ifdef CONFIG_BLOCK |
1106 | case CEPH_MSG_DATA_BIO: | |
8ae4f4f5 | 1107 | page = ceph_msg_data_bio_next(cursor, page_offset, length); |
6aaa4511 | 1108 | break; |
dd236fcb | 1109 | #endif /* CONFIG_BLOCK */ |
6aaa4511 | 1110 | case CEPH_MSG_DATA_NONE: |
dd236fcb AE |
1111 | default: |
1112 | page = NULL; | |
1113 | break; | |
1114 | } | |
1115 | BUG_ON(!page); | |
1116 | BUG_ON(*page_offset + *length > PAGE_SIZE); | |
1117 | BUG_ON(!*length); | |
1118 | if (last_piece) | |
8ae4f4f5 | 1119 | *last_piece = cursor->last_piece; |
dd236fcb AE |
1120 | |
1121 | return page; | |
1122 | } | |
1123 | ||
1124 | /* | |
1125 | * Returns true if the result moves the cursor on to the next piece | |
1126 | * of the data item. | |
1127 | */ | |
8ae4f4f5 AE |
1128 | static bool ceph_msg_data_advance(struct ceph_msg_data_cursor *cursor, |
1129 | size_t bytes) | |
dd236fcb AE |
1130 | { |
1131 | bool new_piece; | |
1132 | ||
25aff7c5 | 1133 | BUG_ON(bytes > cursor->resid); |
8ae4f4f5 | 1134 | switch (cursor->data->type) { |
dd236fcb | 1135 | case CEPH_MSG_DATA_PAGELIST: |
8ae4f4f5 | 1136 | new_piece = ceph_msg_data_pagelist_advance(cursor, bytes); |
dd236fcb | 1137 | break; |
e766d7b5 | 1138 | case CEPH_MSG_DATA_PAGES: |
8ae4f4f5 | 1139 | new_piece = ceph_msg_data_pages_advance(cursor, bytes); |
e766d7b5 | 1140 | break; |
dd236fcb AE |
1141 | #ifdef CONFIG_BLOCK |
1142 | case CEPH_MSG_DATA_BIO: | |
8ae4f4f5 | 1143 | new_piece = ceph_msg_data_bio_advance(cursor, bytes); |
6aaa4511 | 1144 | break; |
dd236fcb | 1145 | #endif /* CONFIG_BLOCK */ |
6aaa4511 | 1146 | case CEPH_MSG_DATA_NONE: |
dd236fcb AE |
1147 | default: |
1148 | BUG(); | |
1149 | break; | |
1150 | } | |
ca8b3a69 | 1151 | cursor->total_resid -= bytes; |
dd236fcb | 1152 | |
ca8b3a69 AE |
1153 | if (!cursor->resid && cursor->total_resid) { |
1154 | WARN_ON(!cursor->last_piece); | |
1155 | BUG_ON(list_is_last(&cursor->data->links, cursor->data_head)); | |
1156 | cursor->data = list_entry_next(cursor->data, links); | |
1157 | __ceph_msg_data_cursor_init(cursor); | |
a51b272e | 1158 | new_piece = true; |
ca8b3a69 | 1159 | } |
a51b272e | 1160 | cursor->need_crc = new_piece; |
ca8b3a69 | 1161 | |
dd236fcb AE |
1162 | return new_piece; |
1163 | } | |
1164 | ||
98fa5dd8 | 1165 | static void prepare_message_data(struct ceph_msg *msg, u32 data_len) |
739c905b | 1166 | { |
739c905b | 1167 | BUG_ON(!msg); |
25aff7c5 | 1168 | BUG_ON(!data_len); |
739c905b | 1169 | |
4c59b4a2 | 1170 | /* Initialize data cursor */ |
fe38a2b6 | 1171 | |
8ae4f4f5 | 1172 | ceph_msg_data_cursor_init(msg, (size_t)data_len); |
739c905b AE |
1173 | } |
1174 | ||
31b8006e SW |
1175 | /* |
1176 | * Prepare footer for currently outgoing message, and finish things | |
1177 | * off. Assumes out_kvec* are already valid.. we just add on to the end. | |
1178 | */ | |
859eb799 | 1179 | static void prepare_write_message_footer(struct ceph_connection *con) |
31b8006e SW |
1180 | { |
1181 | struct ceph_msg *m = con->out_msg; | |
859eb799 | 1182 | int v = con->out_kvec_left; |
31b8006e | 1183 | |
fd154f3c AE |
1184 | m->footer.flags |= CEPH_MSG_FOOTER_COMPLETE; |
1185 | ||
31b8006e SW |
1186 | dout("prepare_write_message_footer %p\n", con); |
1187 | con->out_kvec_is_msg = true; | |
1188 | con->out_kvec[v].iov_base = &m->footer; | |
1189 | con->out_kvec[v].iov_len = sizeof(m->footer); | |
1190 | con->out_kvec_bytes += sizeof(m->footer); | |
1191 | con->out_kvec_left++; | |
1192 | con->out_more = m->more_to_follow; | |
c86a2930 | 1193 | con->out_msg_done = true; |
31b8006e SW |
1194 | } |
1195 | ||
1196 | /* | |
1197 | * Prepare headers for the next outgoing message. | |
1198 | */ | |
1199 | static void prepare_write_message(struct ceph_connection *con) | |
1200 | { | |
1201 | struct ceph_msg *m; | |
a9a0c51a | 1202 | u32 crc; |
31b8006e | 1203 | |
e2200423 | 1204 | con_out_kvec_reset(con); |
31b8006e | 1205 | con->out_kvec_is_msg = true; |
c86a2930 | 1206 | con->out_msg_done = false; |
31b8006e SW |
1207 | |
1208 | /* Sneak an ack in there first? If we can get it into the same | |
1209 | * TCP packet that's a good thing. */ | |
1210 | if (con->in_seq > con->in_seq_acked) { | |
1211 | con->in_seq_acked = con->in_seq; | |
e2200423 | 1212 | con_out_kvec_add(con, sizeof (tag_ack), &tag_ack); |
31b8006e | 1213 | con->out_temp_ack = cpu_to_le64(con->in_seq_acked); |
e2200423 | 1214 | con_out_kvec_add(con, sizeof (con->out_temp_ack), |
859eb799 | 1215 | &con->out_temp_ack); |
31b8006e SW |
1216 | } |
1217 | ||
38941f80 | 1218 | BUG_ON(list_empty(&con->out_queue)); |
859eb799 | 1219 | m = list_first_entry(&con->out_queue, struct ceph_msg, list_head); |
c86a2930 | 1220 | con->out_msg = m; |
38941f80 | 1221 | BUG_ON(m->con != con); |
4cf9d544 SW |
1222 | |
1223 | /* put message on sent list */ | |
1224 | ceph_msg_get(m); | |
1225 | list_move_tail(&m->list_head, &con->out_sent); | |
31b8006e | 1226 | |
e84346b7 SW |
1227 | /* |
1228 | * only assign outgoing seq # if we haven't sent this message | |
1229 | * yet. if it is requeued, resend with it's original seq. | |
1230 | */ | |
1231 | if (m->needs_out_seq) { | |
1232 | m->hdr.seq = cpu_to_le64(++con->out_seq); | |
1233 | m->needs_out_seq = false; | |
1234 | } | |
98fa5dd8 | 1235 | WARN_ON(m->data_length != le32_to_cpu(m->hdr.data_len)); |
31b8006e | 1236 | |
98fa5dd8 | 1237 | dout("prepare_write_message %p seq %lld type %d len %d+%d+%zd\n", |
31b8006e SW |
1238 | m, con->out_seq, le16_to_cpu(m->hdr.type), |
1239 | le32_to_cpu(m->hdr.front_len), le32_to_cpu(m->hdr.middle_len), | |
98fa5dd8 | 1240 | m->data_length); |
31b8006e SW |
1241 | BUG_ON(le32_to_cpu(m->hdr.front_len) != m->front.iov_len); |
1242 | ||
1243 | /* tag + hdr + front + middle */ | |
e2200423 AE |
1244 | con_out_kvec_add(con, sizeof (tag_msg), &tag_msg); |
1245 | con_out_kvec_add(con, sizeof (m->hdr), &m->hdr); | |
1246 | con_out_kvec_add(con, m->front.iov_len, m->front.iov_base); | |
859eb799 | 1247 | |
31b8006e | 1248 | if (m->middle) |
e2200423 | 1249 | con_out_kvec_add(con, m->middle->vec.iov_len, |
859eb799 | 1250 | m->middle->vec.iov_base); |
31b8006e SW |
1251 | |
1252 | /* fill in crc (except data pages), footer */ | |
a9a0c51a AE |
1253 | crc = crc32c(0, &m->hdr, offsetof(struct ceph_msg_header, crc)); |
1254 | con->out_msg->hdr.crc = cpu_to_le32(crc); | |
fd154f3c | 1255 | con->out_msg->footer.flags = 0; |
a9a0c51a AE |
1256 | |
1257 | crc = crc32c(0, m->front.iov_base, m->front.iov_len); | |
1258 | con->out_msg->footer.front_crc = cpu_to_le32(crc); | |
1259 | if (m->middle) { | |
1260 | crc = crc32c(0, m->middle->vec.iov_base, | |
1261 | m->middle->vec.iov_len); | |
1262 | con->out_msg->footer.middle_crc = cpu_to_le32(crc); | |
1263 | } else | |
31b8006e | 1264 | con->out_msg->footer.middle_crc = 0; |
739c905b | 1265 | dout("%s front_crc %u middle_crc %u\n", __func__, |
31b8006e SW |
1266 | le32_to_cpu(con->out_msg->footer.front_crc), |
1267 | le32_to_cpu(con->out_msg->footer.middle_crc)); | |
1268 | ||
1269 | /* is there a data payload? */ | |
739c905b | 1270 | con->out_msg->footer.data_crc = 0; |
98fa5dd8 AE |
1271 | if (m->data_length) { |
1272 | prepare_message_data(con->out_msg, m->data_length); | |
78625051 AE |
1273 | con->out_more = 1; /* data + footer will follow */ |
1274 | } else { | |
31b8006e | 1275 | /* no, queue up footer too and be done */ |
859eb799 | 1276 | prepare_write_message_footer(con); |
78625051 | 1277 | } |
31b8006e | 1278 | |
c9ffc77a | 1279 | con_flag_set(con, CON_FLAG_WRITE_PENDING); |
31b8006e SW |
1280 | } |
1281 | ||
1282 | /* | |
1283 | * Prepare an ack. | |
1284 | */ | |
1285 | static void prepare_write_ack(struct ceph_connection *con) | |
1286 | { | |
1287 | dout("prepare_write_ack %p %llu -> %llu\n", con, | |
1288 | con->in_seq_acked, con->in_seq); | |
1289 | con->in_seq_acked = con->in_seq; | |
1290 | ||
e2200423 | 1291 | con_out_kvec_reset(con); |
859eb799 | 1292 | |
e2200423 | 1293 | con_out_kvec_add(con, sizeof (tag_ack), &tag_ack); |
859eb799 | 1294 | |
31b8006e | 1295 | con->out_temp_ack = cpu_to_le64(con->in_seq_acked); |
e2200423 | 1296 | con_out_kvec_add(con, sizeof (con->out_temp_ack), |
859eb799 AE |
1297 | &con->out_temp_ack); |
1298 | ||
31b8006e | 1299 | con->out_more = 1; /* more will follow.. eventually.. */ |
c9ffc77a | 1300 | con_flag_set(con, CON_FLAG_WRITE_PENDING); |
31b8006e SW |
1301 | } |
1302 | ||
3a23083b SW |
1303 | /* |
1304 | * Prepare to share the seq during handshake | |
1305 | */ | |
1306 | static void prepare_write_seq(struct ceph_connection *con) | |
1307 | { | |
1308 | dout("prepare_write_seq %p %llu -> %llu\n", con, | |
1309 | con->in_seq_acked, con->in_seq); | |
1310 | con->in_seq_acked = con->in_seq; | |
1311 | ||
1312 | con_out_kvec_reset(con); | |
1313 | ||
1314 | con->out_temp_ack = cpu_to_le64(con->in_seq_acked); | |
1315 | con_out_kvec_add(con, sizeof (con->out_temp_ack), | |
1316 | &con->out_temp_ack); | |
1317 | ||
1318 | con_flag_set(con, CON_FLAG_WRITE_PENDING); | |
1319 | } | |
1320 | ||
31b8006e SW |
1321 | /* |
1322 | * Prepare to write keepalive byte. | |
1323 | */ | |
1324 | static void prepare_write_keepalive(struct ceph_connection *con) | |
1325 | { | |
1326 | dout("prepare_write_keepalive %p\n", con); | |
e2200423 AE |
1327 | con_out_kvec_reset(con); |
1328 | con_out_kvec_add(con, sizeof (tag_keepalive), &tag_keepalive); | |
c9ffc77a | 1329 | con_flag_set(con, CON_FLAG_WRITE_PENDING); |
31b8006e SW |
1330 | } |
1331 | ||
1332 | /* | |
1333 | * Connection negotiation. | |
1334 | */ | |
1335 | ||
dac1e716 AE |
1336 | static struct ceph_auth_handshake *get_connect_authorizer(struct ceph_connection *con, |
1337 | int *auth_proto) | |
4e7a5dcd | 1338 | { |
a3530df3 | 1339 | struct ceph_auth_handshake *auth; |
b1c6b980 AE |
1340 | |
1341 | if (!con->ops->get_authorizer) { | |
1342 | con->out_connect.authorizer_protocol = CEPH_AUTH_UNKNOWN; | |
1343 | con->out_connect.authorizer_len = 0; | |
729796be | 1344 | return NULL; |
b1c6b980 AE |
1345 | } |
1346 | ||
1347 | /* Can't hold the mutex while getting authorizer */ | |
ec302645 | 1348 | mutex_unlock(&con->mutex); |
dac1e716 | 1349 | auth = con->ops->get_authorizer(con, auth_proto, con->auth_retry); |
ec302645 | 1350 | mutex_lock(&con->mutex); |
4e7a5dcd | 1351 | |
a3530df3 | 1352 | if (IS_ERR(auth)) |
729796be | 1353 | return auth; |
8dacc7da | 1354 | if (con->state != CON_STATE_NEGOTIATING) |
729796be | 1355 | return ERR_PTR(-EAGAIN); |
0da5d703 | 1356 | |
8f43fb53 AE |
1357 | con->auth_reply_buf = auth->authorizer_reply_buf; |
1358 | con->auth_reply_buf_len = auth->authorizer_reply_buf_len; | |
729796be | 1359 | return auth; |
4e7a5dcd SW |
1360 | } |
1361 | ||
31b8006e SW |
1362 | /* |
1363 | * We connected to a peer and are saying hello. | |
1364 | */ | |
e825a66d | 1365 | static void prepare_write_banner(struct ceph_connection *con) |
31b8006e | 1366 | { |
e2200423 AE |
1367 | con_out_kvec_add(con, strlen(CEPH_BANNER), CEPH_BANNER); |
1368 | con_out_kvec_add(con, sizeof (con->msgr->my_enc_addr), | |
e825a66d | 1369 | &con->msgr->my_enc_addr); |
eed0ef2c | 1370 | |
eed0ef2c | 1371 | con->out_more = 0; |
c9ffc77a | 1372 | con_flag_set(con, CON_FLAG_WRITE_PENDING); |
eed0ef2c SW |
1373 | } |
1374 | ||
e825a66d | 1375 | static int prepare_write_connect(struct ceph_connection *con) |
eed0ef2c | 1376 | { |
95c96174 | 1377 | unsigned int global_seq = get_global_seq(con->msgr, 0); |
31b8006e | 1378 | int proto; |
dac1e716 | 1379 | int auth_proto; |
729796be | 1380 | struct ceph_auth_handshake *auth; |
31b8006e SW |
1381 | |
1382 | switch (con->peer_name.type) { | |
1383 | case CEPH_ENTITY_TYPE_MON: | |
1384 | proto = CEPH_MONC_PROTOCOL; | |
1385 | break; | |
1386 | case CEPH_ENTITY_TYPE_OSD: | |
1387 | proto = CEPH_OSDC_PROTOCOL; | |
1388 | break; | |
1389 | case CEPH_ENTITY_TYPE_MDS: | |
1390 | proto = CEPH_MDSC_PROTOCOL; | |
1391 | break; | |
1392 | default: | |
1393 | BUG(); | |
1394 | } | |
1395 | ||
1396 | dout("prepare_write_connect %p cseq=%d gseq=%d proto=%d\n", con, | |
1397 | con->connect_seq, global_seq, proto); | |
4e7a5dcd | 1398 | |
e825a66d | 1399 | con->out_connect.features = cpu_to_le64(con->msgr->supported_features); |
31b8006e SW |
1400 | con->out_connect.host_type = cpu_to_le32(CEPH_ENTITY_TYPE_CLIENT); |
1401 | con->out_connect.connect_seq = cpu_to_le32(con->connect_seq); | |
1402 | con->out_connect.global_seq = cpu_to_le32(global_seq); | |
1403 | con->out_connect.protocol_version = cpu_to_le32(proto); | |
1404 | con->out_connect.flags = 0; | |
31b8006e | 1405 | |
dac1e716 AE |
1406 | auth_proto = CEPH_AUTH_UNKNOWN; |
1407 | auth = get_connect_authorizer(con, &auth_proto); | |
729796be AE |
1408 | if (IS_ERR(auth)) |
1409 | return PTR_ERR(auth); | |
3da54776 | 1410 | |
dac1e716 | 1411 | con->out_connect.authorizer_protocol = cpu_to_le32(auth_proto); |
3da54776 AE |
1412 | con->out_connect.authorizer_len = auth ? |
1413 | cpu_to_le32(auth->authorizer_buf_len) : 0; | |
1414 | ||
e2200423 | 1415 | con_out_kvec_add(con, sizeof (con->out_connect), |
3da54776 AE |
1416 | &con->out_connect); |
1417 | if (auth && auth->authorizer_buf_len) | |
e2200423 | 1418 | con_out_kvec_add(con, auth->authorizer_buf_len, |
3da54776 | 1419 | auth->authorizer_buf); |
859eb799 | 1420 | |
31b8006e | 1421 | con->out_more = 0; |
c9ffc77a | 1422 | con_flag_set(con, CON_FLAG_WRITE_PENDING); |
4e7a5dcd | 1423 | |
e10c758e | 1424 | return 0; |
31b8006e SW |
1425 | } |
1426 | ||
31b8006e SW |
1427 | /* |
1428 | * write as much of pending kvecs to the socket as we can. | |
1429 | * 1 -> done | |
1430 | * 0 -> socket full, but more to do | |
1431 | * <0 -> error | |
1432 | */ | |
1433 | static int write_partial_kvec(struct ceph_connection *con) | |
1434 | { | |
1435 | int ret; | |
1436 | ||
1437 | dout("write_partial_kvec %p %d left\n", con, con->out_kvec_bytes); | |
1438 | while (con->out_kvec_bytes > 0) { | |
1439 | ret = ceph_tcp_sendmsg(con->sock, con->out_kvec_cur, | |
1440 | con->out_kvec_left, con->out_kvec_bytes, | |
1441 | con->out_more); | |
1442 | if (ret <= 0) | |
1443 | goto out; | |
1444 | con->out_kvec_bytes -= ret; | |
1445 | if (con->out_kvec_bytes == 0) | |
1446 | break; /* done */ | |
f42299e6 AE |
1447 | |
1448 | /* account for full iov entries consumed */ | |
1449 | while (ret >= con->out_kvec_cur->iov_len) { | |
1450 | BUG_ON(!con->out_kvec_left); | |
1451 | ret -= con->out_kvec_cur->iov_len; | |
1452 | con->out_kvec_cur++; | |
1453 | con->out_kvec_left--; | |
1454 | } | |
1455 | /* and for a partially-consumed entry */ | |
1456 | if (ret) { | |
1457 | con->out_kvec_cur->iov_len -= ret; | |
1458 | con->out_kvec_cur->iov_base += ret; | |
31b8006e SW |
1459 | } |
1460 | } | |
1461 | con->out_kvec_left = 0; | |
1462 | con->out_kvec_is_msg = false; | |
1463 | ret = 1; | |
1464 | out: | |
1465 | dout("write_partial_kvec %p %d left in %d kvecs ret = %d\n", con, | |
1466 | con->out_kvec_bytes, con->out_kvec_left, ret); | |
1467 | return ret; /* done! */ | |
1468 | } | |
1469 | ||
35b62808 AE |
1470 | static u32 ceph_crc32c_page(u32 crc, struct page *page, |
1471 | unsigned int page_offset, | |
1472 | unsigned int length) | |
1473 | { | |
1474 | char *kaddr; | |
1475 | ||
1476 | kaddr = kmap(page); | |
1477 | BUG_ON(kaddr == NULL); | |
1478 | crc = crc32c(crc, kaddr + page_offset, length); | |
1479 | kunmap(page); | |
1480 | ||
1481 | return crc; | |
1482 | } | |
31b8006e SW |
1483 | /* |
1484 | * Write as much message data payload as we can. If we finish, queue | |
1485 | * up the footer. | |
1486 | * 1 -> done, footer is now queued in out_kvec[]. | |
1487 | * 0 -> socket full, but more to do | |
1488 | * <0 -> error | |
1489 | */ | |
34d2d200 | 1490 | static int write_partial_message_data(struct ceph_connection *con) |
31b8006e SW |
1491 | { |
1492 | struct ceph_msg *msg = con->out_msg; | |
8ae4f4f5 | 1493 | struct ceph_msg_data_cursor *cursor = &msg->cursor; |
37675b0f | 1494 | bool do_datacrc = !con->msgr->nocrc; |
f5db90bc | 1495 | u32 crc; |
31b8006e | 1496 | |
859a35d5 | 1497 | dout("%s %p msg %p\n", __func__, con, msg); |
31b8006e | 1498 | |
5240d9f9 | 1499 | if (list_empty(&msg->data)) |
4c59b4a2 AE |
1500 | return -EINVAL; |
1501 | ||
5821bd8c AE |
1502 | /* |
1503 | * Iterate through each page that contains data to be | |
1504 | * written, and send as much as possible for each. | |
1505 | * | |
1506 | * If we are calculating the data crc (the default), we will | |
1507 | * need to map the page. If we have no pages, they have | |
1508 | * been revoked, so use the zero page. | |
1509 | */ | |
f5db90bc | 1510 | crc = do_datacrc ? le32_to_cpu(msg->footer.data_crc) : 0; |
643c68a4 | 1511 | while (cursor->resid) { |
8a166d05 | 1512 | struct page *page; |
e387d525 AE |
1513 | size_t page_offset; |
1514 | size_t length; | |
8a166d05 | 1515 | bool last_piece; |
8ea299bc | 1516 | bool need_crc; |
f5db90bc | 1517 | int ret; |
68b4476b | 1518 | |
8ae4f4f5 | 1519 | page = ceph_msg_data_next(&msg->cursor, &page_offset, &length, |
4c59b4a2 | 1520 | &last_piece); |
e387d525 | 1521 | ret = ceph_tcp_sendpage(con->sock, page, page_offset, |
fe38a2b6 | 1522 | length, last_piece); |
f5db90bc AE |
1523 | if (ret <= 0) { |
1524 | if (do_datacrc) | |
1525 | msg->footer.data_crc = cpu_to_le32(crc); | |
31b8006e | 1526 | |
f5db90bc AE |
1527 | return ret; |
1528 | } | |
143334ff AE |
1529 | if (do_datacrc && cursor->need_crc) |
1530 | crc = ceph_crc32c_page(crc, page, page_offset, length); | |
8ae4f4f5 | 1531 | need_crc = ceph_msg_data_advance(&msg->cursor, (size_t)ret); |
31b8006e SW |
1532 | } |
1533 | ||
34d2d200 | 1534 | dout("%s %p msg %p done\n", __func__, con, msg); |
31b8006e SW |
1535 | |
1536 | /* prepare and queue up footer, too */ | |
f5db90bc AE |
1537 | if (do_datacrc) |
1538 | msg->footer.data_crc = cpu_to_le32(crc); | |
1539 | else | |
84ca8fc8 | 1540 | msg->footer.flags |= CEPH_MSG_FOOTER_NOCRC; |
e2200423 | 1541 | con_out_kvec_reset(con); |
859eb799 | 1542 | prepare_write_message_footer(con); |
f5db90bc AE |
1543 | |
1544 | return 1; /* must return > 0 to indicate success */ | |
31b8006e SW |
1545 | } |
1546 | ||
1547 | /* | |
1548 | * write some zeros | |
1549 | */ | |
1550 | static int write_partial_skip(struct ceph_connection *con) | |
1551 | { | |
1552 | int ret; | |
1553 | ||
1554 | while (con->out_skip > 0) { | |
31739139 | 1555 | size_t size = min(con->out_skip, (int) PAGE_CACHE_SIZE); |
31b8006e | 1556 | |
e1dcb128 | 1557 | ret = ceph_tcp_sendpage(con->sock, zero_page, 0, size, true); |
31b8006e SW |
1558 | if (ret <= 0) |
1559 | goto out; | |
1560 | con->out_skip -= ret; | |
1561 | } | |
1562 | ret = 1; | |
1563 | out: | |
1564 | return ret; | |
1565 | } | |
1566 | ||
1567 | /* | |
1568 | * Prepare to read connection handshake, or an ack. | |
1569 | */ | |
eed0ef2c SW |
1570 | static void prepare_read_banner(struct ceph_connection *con) |
1571 | { | |
1572 | dout("prepare_read_banner %p\n", con); | |
1573 | con->in_base_pos = 0; | |
1574 | } | |
1575 | ||
31b8006e SW |
1576 | static void prepare_read_connect(struct ceph_connection *con) |
1577 | { | |
1578 | dout("prepare_read_connect %p\n", con); | |
1579 | con->in_base_pos = 0; | |
1580 | } | |
1581 | ||
1582 | static void prepare_read_ack(struct ceph_connection *con) | |
1583 | { | |
1584 | dout("prepare_read_ack %p\n", con); | |
1585 | con->in_base_pos = 0; | |
1586 | } | |
1587 | ||
3a23083b SW |
1588 | static void prepare_read_seq(struct ceph_connection *con) |
1589 | { | |
1590 | dout("prepare_read_seq %p\n", con); | |
1591 | con->in_base_pos = 0; | |
1592 | con->in_tag = CEPH_MSGR_TAG_SEQ; | |
1593 | } | |
1594 | ||
31b8006e SW |
1595 | static void prepare_read_tag(struct ceph_connection *con) |
1596 | { | |
1597 | dout("prepare_read_tag %p\n", con); | |
1598 | con->in_base_pos = 0; | |
1599 | con->in_tag = CEPH_MSGR_TAG_READY; | |
1600 | } | |
1601 | ||
1602 | /* | |
1603 | * Prepare to read a message. | |
1604 | */ | |
1605 | static int prepare_read_message(struct ceph_connection *con) | |
1606 | { | |
1607 | dout("prepare_read_message %p\n", con); | |
1608 | BUG_ON(con->in_msg != NULL); | |
1609 | con->in_base_pos = 0; | |
1610 | con->in_front_crc = con->in_middle_crc = con->in_data_crc = 0; | |
1611 | return 0; | |
1612 | } | |
1613 | ||
1614 | ||
1615 | static int read_partial(struct ceph_connection *con, | |
fd51653f | 1616 | int end, int size, void *object) |
31b8006e | 1617 | { |
e6cee71f AE |
1618 | while (con->in_base_pos < end) { |
1619 | int left = end - con->in_base_pos; | |
31b8006e SW |
1620 | int have = size - left; |
1621 | int ret = ceph_tcp_recvmsg(con->sock, object + have, left); | |
1622 | if (ret <= 0) | |
1623 | return ret; | |
1624 | con->in_base_pos += ret; | |
1625 | } | |
1626 | return 1; | |
1627 | } | |
1628 | ||
1629 | ||
1630 | /* | |
1631 | * Read all or part of the connect-side handshake on a new connection | |
1632 | */ | |
eed0ef2c | 1633 | static int read_partial_banner(struct ceph_connection *con) |
31b8006e | 1634 | { |
fd51653f AE |
1635 | int size; |
1636 | int end; | |
1637 | int ret; | |
31b8006e | 1638 | |
eed0ef2c | 1639 | dout("read_partial_banner %p at %d\n", con, con->in_base_pos); |
31b8006e SW |
1640 | |
1641 | /* peer's banner */ | |
fd51653f AE |
1642 | size = strlen(CEPH_BANNER); |
1643 | end = size; | |
1644 | ret = read_partial(con, end, size, con->in_banner); | |
31b8006e SW |
1645 | if (ret <= 0) |
1646 | goto out; | |
fd51653f AE |
1647 | |
1648 | size = sizeof (con->actual_peer_addr); | |
1649 | end += size; | |
1650 | ret = read_partial(con, end, size, &con->actual_peer_addr); | |
31b8006e SW |
1651 | if (ret <= 0) |
1652 | goto out; | |
fd51653f AE |
1653 | |
1654 | size = sizeof (con->peer_addr_for_me); | |
1655 | end += size; | |
1656 | ret = read_partial(con, end, size, &con->peer_addr_for_me); | |
31b8006e SW |
1657 | if (ret <= 0) |
1658 | goto out; | |
fd51653f | 1659 | |
eed0ef2c SW |
1660 | out: |
1661 | return ret; | |
1662 | } | |
1663 | ||
1664 | static int read_partial_connect(struct ceph_connection *con) | |
1665 | { | |
fd51653f AE |
1666 | int size; |
1667 | int end; | |
1668 | int ret; | |
eed0ef2c SW |
1669 | |
1670 | dout("read_partial_connect %p at %d\n", con, con->in_base_pos); | |
1671 | ||
fd51653f AE |
1672 | size = sizeof (con->in_reply); |
1673 | end = size; | |
1674 | ret = read_partial(con, end, size, &con->in_reply); | |
31b8006e SW |
1675 | if (ret <= 0) |
1676 | goto out; | |
fd51653f AE |
1677 | |
1678 | size = le32_to_cpu(con->in_reply.authorizer_len); | |
1679 | end += size; | |
1680 | ret = read_partial(con, end, size, con->auth_reply_buf); | |
4e7a5dcd SW |
1681 | if (ret <= 0) |
1682 | goto out; | |
31b8006e | 1683 | |
4e7a5dcd SW |
1684 | dout("read_partial_connect %p tag %d, con_seq = %u, g_seq = %u\n", |
1685 | con, (int)con->in_reply.tag, | |
1686 | le32_to_cpu(con->in_reply.connect_seq), | |
31b8006e SW |
1687 | le32_to_cpu(con->in_reply.global_seq)); |
1688 | out: | |
1689 | return ret; | |
eed0ef2c | 1690 | |
31b8006e SW |
1691 | } |
1692 | ||
1693 | /* | |
1694 | * Verify the hello banner looks okay. | |
1695 | */ | |
1696 | static int verify_hello(struct ceph_connection *con) | |
1697 | { | |
1698 | if (memcmp(con->in_banner, CEPH_BANNER, strlen(CEPH_BANNER))) { | |
13e38c8a | 1699 | pr_err("connect to %s got bad banner\n", |
3d14c5d2 | 1700 | ceph_pr_addr(&con->peer_addr.in_addr)); |
31b8006e SW |
1701 | con->error_msg = "protocol error, bad banner"; |
1702 | return -1; | |
1703 | } | |
1704 | return 0; | |
1705 | } | |
1706 | ||
1707 | static bool addr_is_blank(struct sockaddr_storage *ss) | |
1708 | { | |
1709 | switch (ss->ss_family) { | |
1710 | case AF_INET: | |
1711 | return ((struct sockaddr_in *)ss)->sin_addr.s_addr == 0; | |
1712 | case AF_INET6: | |
1713 | return | |
1714 | ((struct sockaddr_in6 *)ss)->sin6_addr.s6_addr32[0] == 0 && | |
1715 | ((struct sockaddr_in6 *)ss)->sin6_addr.s6_addr32[1] == 0 && | |
1716 | ((struct sockaddr_in6 *)ss)->sin6_addr.s6_addr32[2] == 0 && | |
1717 | ((struct sockaddr_in6 *)ss)->sin6_addr.s6_addr32[3] == 0; | |
1718 | } | |
1719 | return false; | |
1720 | } | |
1721 | ||
1722 | static int addr_port(struct sockaddr_storage *ss) | |
1723 | { | |
1724 | switch (ss->ss_family) { | |
1725 | case AF_INET: | |
f28bcfbe | 1726 | return ntohs(((struct sockaddr_in *)ss)->sin_port); |
31b8006e | 1727 | case AF_INET6: |
f28bcfbe | 1728 | return ntohs(((struct sockaddr_in6 *)ss)->sin6_port); |
31b8006e SW |
1729 | } |
1730 | return 0; | |
1731 | } | |
1732 | ||
1733 | static void addr_set_port(struct sockaddr_storage *ss, int p) | |
1734 | { | |
1735 | switch (ss->ss_family) { | |
1736 | case AF_INET: | |
1737 | ((struct sockaddr_in *)ss)->sin_port = htons(p); | |
a2a79609 | 1738 | break; |
31b8006e SW |
1739 | case AF_INET6: |
1740 | ((struct sockaddr_in6 *)ss)->sin6_port = htons(p); | |
a2a79609 | 1741 | break; |
31b8006e SW |
1742 | } |
1743 | } | |
1744 | ||
ee3b56f2 NW |
1745 | /* |
1746 | * Unlike other *_pton function semantics, zero indicates success. | |
1747 | */ | |
1748 | static int ceph_pton(const char *str, size_t len, struct sockaddr_storage *ss, | |
1749 | char delim, const char **ipend) | |
1750 | { | |
99f0f3b2 AE |
1751 | struct sockaddr_in *in4 = (struct sockaddr_in *) ss; |
1752 | struct sockaddr_in6 *in6 = (struct sockaddr_in6 *) ss; | |
ee3b56f2 NW |
1753 | |
1754 | memset(ss, 0, sizeof(*ss)); | |
1755 | ||
1756 | if (in4_pton(str, len, (u8 *)&in4->sin_addr.s_addr, delim, ipend)) { | |
1757 | ss->ss_family = AF_INET; | |
1758 | return 0; | |
1759 | } | |
1760 | ||
1761 | if (in6_pton(str, len, (u8 *)&in6->sin6_addr.s6_addr, delim, ipend)) { | |
1762 | ss->ss_family = AF_INET6; | |
1763 | return 0; | |
1764 | } | |
1765 | ||
1766 | return -EINVAL; | |
1767 | } | |
1768 | ||
1769 | /* | |
1770 | * Extract hostname string and resolve using kernel DNS facility. | |
1771 | */ | |
1772 | #ifdef CONFIG_CEPH_LIB_USE_DNS_RESOLVER | |
1773 | static int ceph_dns_resolve_name(const char *name, size_t namelen, | |
1774 | struct sockaddr_storage *ss, char delim, const char **ipend) | |
1775 | { | |
1776 | const char *end, *delim_p; | |
1777 | char *colon_p, *ip_addr = NULL; | |
1778 | int ip_len, ret; | |
1779 | ||
1780 | /* | |
1781 | * The end of the hostname occurs immediately preceding the delimiter or | |
1782 | * the port marker (':') where the delimiter takes precedence. | |
1783 | */ | |
1784 | delim_p = memchr(name, delim, namelen); | |
1785 | colon_p = memchr(name, ':', namelen); | |
1786 | ||
1787 | if (delim_p && colon_p) | |
1788 | end = delim_p < colon_p ? delim_p : colon_p; | |
1789 | else if (!delim_p && colon_p) | |
1790 | end = colon_p; | |
1791 | else { | |
1792 | end = delim_p; | |
1793 | if (!end) /* case: hostname:/ */ | |
1794 | end = name + namelen; | |
1795 | } | |
1796 | ||
1797 | if (end <= name) | |
1798 | return -EINVAL; | |
1799 | ||
1800 | /* do dns_resolve upcall */ | |
1801 | ip_len = dns_query(NULL, name, end - name, NULL, &ip_addr, NULL); | |
1802 | if (ip_len > 0) | |
1803 | ret = ceph_pton(ip_addr, ip_len, ss, -1, NULL); | |
1804 | else | |
1805 | ret = -ESRCH; | |
1806 | ||
1807 | kfree(ip_addr); | |
1808 | ||
1809 | *ipend = end; | |
1810 | ||
1811 | pr_info("resolve '%.*s' (ret=%d): %s\n", (int)(end - name), name, | |
1812 | ret, ret ? "failed" : ceph_pr_addr(ss)); | |
1813 | ||
1814 | return ret; | |
1815 | } | |
1816 | #else | |
1817 | static inline int ceph_dns_resolve_name(const char *name, size_t namelen, | |
1818 | struct sockaddr_storage *ss, char delim, const char **ipend) | |
1819 | { | |
1820 | return -EINVAL; | |
1821 | } | |
1822 | #endif | |
1823 | ||
1824 | /* | |
1825 | * Parse a server name (IP or hostname). If a valid IP address is not found | |
1826 | * then try to extract a hostname to resolve using userspace DNS upcall. | |
1827 | */ | |
1828 | static int ceph_parse_server_name(const char *name, size_t namelen, | |
1829 | struct sockaddr_storage *ss, char delim, const char **ipend) | |
1830 | { | |
1831 | int ret; | |
1832 | ||
1833 | ret = ceph_pton(name, namelen, ss, delim, ipend); | |
1834 | if (ret) | |
1835 | ret = ceph_dns_resolve_name(name, namelen, ss, delim, ipend); | |
1836 | ||
1837 | return ret; | |
1838 | } | |
1839 | ||
31b8006e SW |
1840 | /* |
1841 | * Parse an ip[:port] list into an addr array. Use the default | |
1842 | * monitor port if a port isn't specified. | |
1843 | */ | |
1844 | int ceph_parse_ips(const char *c, const char *end, | |
1845 | struct ceph_entity_addr *addr, | |
1846 | int max_count, int *count) | |
1847 | { | |
ee3b56f2 | 1848 | int i, ret = -EINVAL; |
31b8006e SW |
1849 | const char *p = c; |
1850 | ||
1851 | dout("parse_ips on '%.*s'\n", (int)(end-c), c); | |
1852 | for (i = 0; i < max_count; i++) { | |
1853 | const char *ipend; | |
1854 | struct sockaddr_storage *ss = &addr[i].in_addr; | |
31b8006e | 1855 | int port; |
39139f64 SW |
1856 | char delim = ','; |
1857 | ||
1858 | if (*p == '[') { | |
1859 | delim = ']'; | |
1860 | p++; | |
1861 | } | |
31b8006e | 1862 | |
ee3b56f2 NW |
1863 | ret = ceph_parse_server_name(p, end - p, ss, delim, &ipend); |
1864 | if (ret) | |
31b8006e | 1865 | goto bad; |
ee3b56f2 NW |
1866 | ret = -EINVAL; |
1867 | ||
31b8006e SW |
1868 | p = ipend; |
1869 | ||
39139f64 SW |
1870 | if (delim == ']') { |
1871 | if (*p != ']') { | |
1872 | dout("missing matching ']'\n"); | |
1873 | goto bad; | |
1874 | } | |
1875 | p++; | |
1876 | } | |
1877 | ||
31b8006e SW |
1878 | /* port? */ |
1879 | if (p < end && *p == ':') { | |
1880 | port = 0; | |
1881 | p++; | |
1882 | while (p < end && *p >= '0' && *p <= '9') { | |
1883 | port = (port * 10) + (*p - '0'); | |
1884 | p++; | |
1885 | } | |
1886 | if (port > 65535 || port == 0) | |
1887 | goto bad; | |
1888 | } else { | |
1889 | port = CEPH_MON_PORT; | |
1890 | } | |
1891 | ||
1892 | addr_set_port(ss, port); | |
1893 | ||
3d14c5d2 | 1894 | dout("parse_ips got %s\n", ceph_pr_addr(ss)); |
31b8006e SW |
1895 | |
1896 | if (p == end) | |
1897 | break; | |
1898 | if (*p != ',') | |
1899 | goto bad; | |
1900 | p++; | |
1901 | } | |
1902 | ||
1903 | if (p != end) | |
1904 | goto bad; | |
1905 | ||
1906 | if (count) | |
1907 | *count = i + 1; | |
1908 | return 0; | |
1909 | ||
1910 | bad: | |
39139f64 | 1911 | pr_err("parse_ips bad ip '%.*s'\n", (int)(end - c), c); |
ee3b56f2 | 1912 | return ret; |
31b8006e | 1913 | } |
3d14c5d2 | 1914 | EXPORT_SYMBOL(ceph_parse_ips); |
31b8006e | 1915 | |
eed0ef2c | 1916 | static int process_banner(struct ceph_connection *con) |
31b8006e | 1917 | { |
eed0ef2c | 1918 | dout("process_banner on %p\n", con); |
31b8006e SW |
1919 | |
1920 | if (verify_hello(con) < 0) | |
1921 | return -1; | |
1922 | ||
63f2d211 SW |
1923 | ceph_decode_addr(&con->actual_peer_addr); |
1924 | ceph_decode_addr(&con->peer_addr_for_me); | |
1925 | ||
31b8006e SW |
1926 | /* |
1927 | * Make sure the other end is who we wanted. note that the other | |
1928 | * end may not yet know their ip address, so if it's 0.0.0.0, give | |
1929 | * them the benefit of the doubt. | |
1930 | */ | |
103e2d3a SW |
1931 | if (memcmp(&con->peer_addr, &con->actual_peer_addr, |
1932 | sizeof(con->peer_addr)) != 0 && | |
31b8006e SW |
1933 | !(addr_is_blank(&con->actual_peer_addr.in_addr) && |
1934 | con->actual_peer_addr.nonce == con->peer_addr.nonce)) { | |
cd84db6e | 1935 | pr_warning("wrong peer, want %s/%d, got %s/%d\n", |
3d14c5d2 | 1936 | ceph_pr_addr(&con->peer_addr.in_addr), |
cd84db6e | 1937 | (int)le32_to_cpu(con->peer_addr.nonce), |
3d14c5d2 | 1938 | ceph_pr_addr(&con->actual_peer_addr.in_addr), |
cd84db6e | 1939 | (int)le32_to_cpu(con->actual_peer_addr.nonce)); |
58bb3b37 | 1940 | con->error_msg = "wrong peer at address"; |
31b8006e SW |
1941 | return -1; |
1942 | } | |
1943 | ||
1944 | /* | |
1945 | * did we learn our address? | |
1946 | */ | |
1947 | if (addr_is_blank(&con->msgr->inst.addr.in_addr)) { | |
1948 | int port = addr_port(&con->msgr->inst.addr.in_addr); | |
1949 | ||
1950 | memcpy(&con->msgr->inst.addr.in_addr, | |
1951 | &con->peer_addr_for_me.in_addr, | |
1952 | sizeof(con->peer_addr_for_me.in_addr)); | |
1953 | addr_set_port(&con->msgr->inst.addr.in_addr, port); | |
63f2d211 | 1954 | encode_my_addr(con->msgr); |
eed0ef2c | 1955 | dout("process_banner learned my addr is %s\n", |
3d14c5d2 | 1956 | ceph_pr_addr(&con->msgr->inst.addr.in_addr)); |
31b8006e SW |
1957 | } |
1958 | ||
eed0ef2c SW |
1959 | return 0; |
1960 | } | |
1961 | ||
1962 | static int process_connect(struct ceph_connection *con) | |
1963 | { | |
3d14c5d2 YS |
1964 | u64 sup_feat = con->msgr->supported_features; |
1965 | u64 req_feat = con->msgr->required_features; | |
04a419f9 | 1966 | u64 server_feat = le64_to_cpu(con->in_reply.features); |
0da5d703 | 1967 | int ret; |
04a419f9 | 1968 | |
eed0ef2c SW |
1969 | dout("process_connect on %p tag %d\n", con, (int)con->in_tag); |
1970 | ||
31b8006e | 1971 | switch (con->in_reply.tag) { |
04a419f9 SW |
1972 | case CEPH_MSGR_TAG_FEATURES: |
1973 | pr_err("%s%lld %s feature set mismatch," | |
1974 | " my %llx < server's %llx, missing %llx\n", | |
1975 | ENTITY_NAME(con->peer_name), | |
3d14c5d2 | 1976 | ceph_pr_addr(&con->peer_addr.in_addr), |
04a419f9 SW |
1977 | sup_feat, server_feat, server_feat & ~sup_feat); |
1978 | con->error_msg = "missing required protocol features"; | |
0fa6ebc6 | 1979 | reset_connection(con); |
04a419f9 SW |
1980 | return -1; |
1981 | ||
31b8006e | 1982 | case CEPH_MSGR_TAG_BADPROTOVER: |
31b8006e SW |
1983 | pr_err("%s%lld %s protocol version mismatch," |
1984 | " my %d != server's %d\n", | |
1985 | ENTITY_NAME(con->peer_name), | |
3d14c5d2 | 1986 | ceph_pr_addr(&con->peer_addr.in_addr), |
31b8006e SW |
1987 | le32_to_cpu(con->out_connect.protocol_version), |
1988 | le32_to_cpu(con->in_reply.protocol_version)); | |
1989 | con->error_msg = "protocol version mismatch"; | |
0fa6ebc6 | 1990 | reset_connection(con); |
31b8006e SW |
1991 | return -1; |
1992 | ||
4e7a5dcd SW |
1993 | case CEPH_MSGR_TAG_BADAUTHORIZER: |
1994 | con->auth_retry++; | |
1995 | dout("process_connect %p got BADAUTHORIZER attempt %d\n", con, | |
1996 | con->auth_retry); | |
1997 | if (con->auth_retry == 2) { | |
1998 | con->error_msg = "connect authorization failure"; | |
4e7a5dcd SW |
1999 | return -1; |
2000 | } | |
6d4221b5 | 2001 | con_out_kvec_reset(con); |
e825a66d | 2002 | ret = prepare_write_connect(con); |
0da5d703 SW |
2003 | if (ret < 0) |
2004 | return ret; | |
63733a0f | 2005 | prepare_read_connect(con); |
4e7a5dcd | 2006 | break; |
31b8006e SW |
2007 | |
2008 | case CEPH_MSGR_TAG_RESETSESSION: | |
2009 | /* | |
2010 | * If we connected with a large connect_seq but the peer | |
2011 | * has no record of a session with us (no connection, or | |
2012 | * connect_seq == 0), they will send RESETSESION to indicate | |
2013 | * that they must have reset their session, and may have | |
2014 | * dropped messages. | |
2015 | */ | |
2016 | dout("process_connect got RESET peer seq %u\n", | |
5bdca4e0 | 2017 | le32_to_cpu(con->in_reply.connect_seq)); |
31b8006e SW |
2018 | pr_err("%s%lld %s connection reset\n", |
2019 | ENTITY_NAME(con->peer_name), | |
3d14c5d2 | 2020 | ceph_pr_addr(&con->peer_addr.in_addr)); |
31b8006e | 2021 | reset_connection(con); |
6d4221b5 | 2022 | con_out_kvec_reset(con); |
5a0f8fdd AE |
2023 | ret = prepare_write_connect(con); |
2024 | if (ret < 0) | |
2025 | return ret; | |
31b8006e SW |
2026 | prepare_read_connect(con); |
2027 | ||
2028 | /* Tell ceph about it. */ | |
ec302645 | 2029 | mutex_unlock(&con->mutex); |
31b8006e SW |
2030 | pr_info("reset on %s%lld\n", ENTITY_NAME(con->peer_name)); |
2031 | if (con->ops->peer_reset) | |
2032 | con->ops->peer_reset(con); | |
ec302645 | 2033 | mutex_lock(&con->mutex); |
8dacc7da | 2034 | if (con->state != CON_STATE_NEGOTIATING) |
0da5d703 | 2035 | return -EAGAIN; |
31b8006e SW |
2036 | break; |
2037 | ||
2038 | case CEPH_MSGR_TAG_RETRY_SESSION: | |
2039 | /* | |
2040 | * If we sent a smaller connect_seq than the peer has, try | |
2041 | * again with a larger value. | |
2042 | */ | |
5bdca4e0 | 2043 | dout("process_connect got RETRY_SESSION my seq %u, peer %u\n", |
31b8006e | 2044 | le32_to_cpu(con->out_connect.connect_seq), |
5bdca4e0 SW |
2045 | le32_to_cpu(con->in_reply.connect_seq)); |
2046 | con->connect_seq = le32_to_cpu(con->in_reply.connect_seq); | |
6d4221b5 | 2047 | con_out_kvec_reset(con); |
5a0f8fdd AE |
2048 | ret = prepare_write_connect(con); |
2049 | if (ret < 0) | |
2050 | return ret; | |
31b8006e SW |
2051 | prepare_read_connect(con); |
2052 | break; | |
2053 | ||
2054 | case CEPH_MSGR_TAG_RETRY_GLOBAL: | |
2055 | /* | |
2056 | * If we sent a smaller global_seq than the peer has, try | |
2057 | * again with a larger value. | |
2058 | */ | |
eed0ef2c | 2059 | dout("process_connect got RETRY_GLOBAL my %u peer_gseq %u\n", |
31b8006e | 2060 | con->peer_global_seq, |
5bdca4e0 | 2061 | le32_to_cpu(con->in_reply.global_seq)); |
31b8006e | 2062 | get_global_seq(con->msgr, |
5bdca4e0 | 2063 | le32_to_cpu(con->in_reply.global_seq)); |
6d4221b5 | 2064 | con_out_kvec_reset(con); |
5a0f8fdd AE |
2065 | ret = prepare_write_connect(con); |
2066 | if (ret < 0) | |
2067 | return ret; | |
31b8006e SW |
2068 | prepare_read_connect(con); |
2069 | break; | |
2070 | ||
3a23083b | 2071 | case CEPH_MSGR_TAG_SEQ: |
31b8006e | 2072 | case CEPH_MSGR_TAG_READY: |
04a419f9 SW |
2073 | if (req_feat & ~server_feat) { |
2074 | pr_err("%s%lld %s protocol feature mismatch," | |
2075 | " my required %llx > server's %llx, need %llx\n", | |
2076 | ENTITY_NAME(con->peer_name), | |
3d14c5d2 | 2077 | ceph_pr_addr(&con->peer_addr.in_addr), |
04a419f9 SW |
2078 | req_feat, server_feat, req_feat & ~server_feat); |
2079 | con->error_msg = "missing required protocol features"; | |
0fa6ebc6 | 2080 | reset_connection(con); |
04a419f9 SW |
2081 | return -1; |
2082 | } | |
8dacc7da | 2083 | |
122070a2 | 2084 | WARN_ON(con->state != CON_STATE_NEGOTIATING); |
8dacc7da | 2085 | con->state = CON_STATE_OPEN; |
20e55c4c | 2086 | con->auth_retry = 0; /* we authenticated; clear flag */ |
31b8006e SW |
2087 | con->peer_global_seq = le32_to_cpu(con->in_reply.global_seq); |
2088 | con->connect_seq++; | |
aba558e2 | 2089 | con->peer_features = server_feat; |
31b8006e SW |
2090 | dout("process_connect got READY gseq %d cseq %d (%d)\n", |
2091 | con->peer_global_seq, | |
2092 | le32_to_cpu(con->in_reply.connect_seq), | |
2093 | con->connect_seq); | |
2094 | WARN_ON(con->connect_seq != | |
2095 | le32_to_cpu(con->in_reply.connect_seq)); | |
92ac41d0 SW |
2096 | |
2097 | if (con->in_reply.flags & CEPH_MSG_CONNECT_LOSSY) | |
c9ffc77a | 2098 | con_flag_set(con, CON_FLAG_LOSSYTX); |
92ac41d0 | 2099 | |
85effe18 | 2100 | con->delay = 0; /* reset backoff memory */ |
92ac41d0 | 2101 | |
3a23083b SW |
2102 | if (con->in_reply.tag == CEPH_MSGR_TAG_SEQ) { |
2103 | prepare_write_seq(con); | |
2104 | prepare_read_seq(con); | |
2105 | } else { | |
2106 | prepare_read_tag(con); | |
2107 | } | |
31b8006e SW |
2108 | break; |
2109 | ||
2110 | case CEPH_MSGR_TAG_WAIT: | |
2111 | /* | |
2112 | * If there is a connection race (we are opening | |
2113 | * connections to each other), one of us may just have | |
2114 | * to WAIT. This shouldn't happen if we are the | |
2115 | * client. | |
2116 | */ | |
04177882 SW |
2117 | pr_err("process_connect got WAIT as client\n"); |
2118 | con->error_msg = "protocol error, got WAIT as client"; | |
2119 | return -1; | |
31b8006e SW |
2120 | |
2121 | default: | |
2122 | pr_err("connect protocol error, will retry\n"); | |
2123 | con->error_msg = "protocol error, garbage tag during connect"; | |
2124 | return -1; | |
2125 | } | |
2126 | return 0; | |
2127 | } | |
2128 | ||
2129 | ||
2130 | /* | |
2131 | * read (part of) an ack | |
2132 | */ | |
2133 | static int read_partial_ack(struct ceph_connection *con) | |
2134 | { | |
fd51653f AE |
2135 | int size = sizeof (con->in_temp_ack); |
2136 | int end = size; | |
31b8006e | 2137 | |
fd51653f | 2138 | return read_partial(con, end, size, &con->in_temp_ack); |
31b8006e SW |
2139 | } |
2140 | ||
31b8006e SW |
2141 | /* |
2142 | * We can finally discard anything that's been acked. | |
2143 | */ | |
2144 | static void process_ack(struct ceph_connection *con) | |
2145 | { | |
2146 | struct ceph_msg *m; | |
2147 | u64 ack = le64_to_cpu(con->in_temp_ack); | |
2148 | u64 seq; | |
2149 | ||
31b8006e SW |
2150 | while (!list_empty(&con->out_sent)) { |
2151 | m = list_first_entry(&con->out_sent, struct ceph_msg, | |
2152 | list_head); | |
2153 | seq = le64_to_cpu(m->hdr.seq); | |
2154 | if (seq > ack) | |
2155 | break; | |
2156 | dout("got ack for seq %llu type %d at %p\n", seq, | |
2157 | le16_to_cpu(m->hdr.type), m); | |
4cf9d544 | 2158 | m->ack_stamp = jiffies; |
31b8006e SW |
2159 | ceph_msg_remove(m); |
2160 | } | |
31b8006e SW |
2161 | prepare_read_tag(con); |
2162 | } | |
2163 | ||
2164 | ||
2450418c | 2165 | static int read_partial_message_section(struct ceph_connection *con, |
213c99ee SW |
2166 | struct kvec *section, |
2167 | unsigned int sec_len, u32 *crc) | |
2450418c | 2168 | { |
68b4476b | 2169 | int ret, left; |
2450418c YS |
2170 | |
2171 | BUG_ON(!section); | |
2172 | ||
2173 | while (section->iov_len < sec_len) { | |
2174 | BUG_ON(section->iov_base == NULL); | |
2175 | left = sec_len - section->iov_len; | |
2176 | ret = ceph_tcp_recvmsg(con->sock, (char *)section->iov_base + | |
2177 | section->iov_len, left); | |
2178 | if (ret <= 0) | |
2179 | return ret; | |
2180 | section->iov_len += ret; | |
2450418c | 2181 | } |
fe3ad593 AE |
2182 | if (section->iov_len == sec_len) |
2183 | *crc = crc32c(0, section->iov_base, section->iov_len); | |
31b8006e | 2184 | |
2450418c YS |
2185 | return 1; |
2186 | } | |
31b8006e | 2187 | |
34d2d200 AE |
2188 | static int read_partial_msg_data(struct ceph_connection *con) |
2189 | { | |
2190 | struct ceph_msg *msg = con->in_msg; | |
8ae4f4f5 | 2191 | struct ceph_msg_data_cursor *cursor = &msg->cursor; |
34d2d200 | 2192 | const bool do_datacrc = !con->msgr->nocrc; |
686be208 AE |
2193 | struct page *page; |
2194 | size_t page_offset; | |
2195 | size_t length; | |
f5db90bc | 2196 | u32 crc = 0; |
34d2d200 AE |
2197 | int ret; |
2198 | ||
2199 | BUG_ON(!msg); | |
5240d9f9 | 2200 | if (list_empty(&msg->data)) |
4c59b4a2 | 2201 | return -EIO; |
34d2d200 | 2202 | |
f5db90bc AE |
2203 | if (do_datacrc) |
2204 | crc = con->in_data_crc; | |
643c68a4 | 2205 | while (cursor->resid) { |
8ae4f4f5 | 2206 | page = ceph_msg_data_next(&msg->cursor, &page_offset, &length, |
4c59b4a2 | 2207 | NULL); |
686be208 | 2208 | ret = ceph_tcp_recvpage(con->sock, page, page_offset, length); |
f5db90bc AE |
2209 | if (ret <= 0) { |
2210 | if (do_datacrc) | |
2211 | con->in_data_crc = crc; | |
2212 | ||
686be208 | 2213 | return ret; |
f5db90bc | 2214 | } |
686be208 AE |
2215 | |
2216 | if (do_datacrc) | |
f5db90bc | 2217 | crc = ceph_crc32c_page(crc, page, page_offset, ret); |
8ae4f4f5 | 2218 | (void) ceph_msg_data_advance(&msg->cursor, (size_t)ret); |
34d2d200 | 2219 | } |
f5db90bc AE |
2220 | if (do_datacrc) |
2221 | con->in_data_crc = crc; | |
34d2d200 AE |
2222 | |
2223 | return 1; /* must return > 0 to indicate success */ | |
2224 | } | |
2225 | ||
31b8006e SW |
2226 | /* |
2227 | * read (part of) a message. | |
2228 | */ | |
686be208 AE |
2229 | static int ceph_con_in_msg_alloc(struct ceph_connection *con, int *skip); |
2230 | ||
31b8006e SW |
2231 | static int read_partial_message(struct ceph_connection *con) |
2232 | { | |
2233 | struct ceph_msg *m = con->in_msg; | |
fd51653f AE |
2234 | int size; |
2235 | int end; | |
31b8006e | 2236 | int ret; |
95c96174 | 2237 | unsigned int front_len, middle_len, data_len; |
37675b0f | 2238 | bool do_datacrc = !con->msgr->nocrc; |
ae18756b | 2239 | u64 seq; |
fe3ad593 | 2240 | u32 crc; |
31b8006e SW |
2241 | |
2242 | dout("read_partial_message con %p msg %p\n", con, m); | |
2243 | ||
2244 | /* header */ | |
fd51653f AE |
2245 | size = sizeof (con->in_hdr); |
2246 | end = size; | |
2247 | ret = read_partial(con, end, size, &con->in_hdr); | |
57dac9d1 AE |
2248 | if (ret <= 0) |
2249 | return ret; | |
fe3ad593 AE |
2250 | |
2251 | crc = crc32c(0, &con->in_hdr, offsetof(struct ceph_msg_header, crc)); | |
2252 | if (cpu_to_le32(crc) != con->in_hdr.crc) { | |
2253 | pr_err("read_partial_message bad hdr " | |
2254 | " crc %u != expected %u\n", | |
2255 | crc, con->in_hdr.crc); | |
2256 | return -EBADMSG; | |
2257 | } | |
2258 | ||
31b8006e SW |
2259 | front_len = le32_to_cpu(con->in_hdr.front_len); |
2260 | if (front_len > CEPH_MSG_MAX_FRONT_LEN) | |
2261 | return -EIO; | |
2262 | middle_len = le32_to_cpu(con->in_hdr.middle_len); | |
7b11ba37 | 2263 | if (middle_len > CEPH_MSG_MAX_MIDDLE_LEN) |
31b8006e SW |
2264 | return -EIO; |
2265 | data_len = le32_to_cpu(con->in_hdr.data_len); | |
2266 | if (data_len > CEPH_MSG_MAX_DATA_LEN) | |
2267 | return -EIO; | |
2268 | ||
ae18756b SW |
2269 | /* verify seq# */ |
2270 | seq = le64_to_cpu(con->in_hdr.seq); | |
2271 | if ((s64)seq - (s64)con->in_seq < 1) { | |
df9f86fa | 2272 | pr_info("skipping %s%lld %s seq %lld expected %lld\n", |
ae18756b | 2273 | ENTITY_NAME(con->peer_name), |
3d14c5d2 | 2274 | ceph_pr_addr(&con->peer_addr.in_addr), |
ae18756b SW |
2275 | seq, con->in_seq + 1); |
2276 | con->in_base_pos = -front_len - middle_len - data_len - | |
2277 | sizeof(m->footer); | |
2278 | con->in_tag = CEPH_MSGR_TAG_READY; | |
ae18756b SW |
2279 | return 0; |
2280 | } else if ((s64)seq - (s64)con->in_seq > 1) { | |
2281 | pr_err("read_partial_message bad seq %lld expected %lld\n", | |
2282 | seq, con->in_seq + 1); | |
2283 | con->error_msg = "bad message sequence # for incoming message"; | |
2284 | return -EBADMSG; | |
2285 | } | |
2286 | ||
31b8006e SW |
2287 | /* allocate message? */ |
2288 | if (!con->in_msg) { | |
4740a623 SW |
2289 | int skip = 0; |
2290 | ||
31b8006e | 2291 | dout("got hdr type %d front %d data %d\n", con->in_hdr.type, |
6ebc8b32 | 2292 | front_len, data_len); |
4740a623 SW |
2293 | ret = ceph_con_in_msg_alloc(con, &skip); |
2294 | if (ret < 0) | |
2295 | return ret; | |
f759ebb9 AE |
2296 | |
2297 | BUG_ON(!con->in_msg ^ skip); | |
2298 | if (con->in_msg && data_len > con->in_msg->data_length) { | |
2299 | pr_warning("%s skipping long message (%u > %zd)\n", | |
2300 | __func__, data_len, con->in_msg->data_length); | |
2301 | ceph_msg_put(con->in_msg); | |
2302 | con->in_msg = NULL; | |
2303 | skip = 1; | |
2304 | } | |
2450418c | 2305 | if (skip) { |
31b8006e | 2306 | /* skip this message */ |
a79832f2 | 2307 | dout("alloc_msg said skip message\n"); |
31b8006e SW |
2308 | con->in_base_pos = -front_len - middle_len - data_len - |
2309 | sizeof(m->footer); | |
2310 | con->in_tag = CEPH_MSGR_TAG_READY; | |
684be25c | 2311 | con->in_seq++; |
31b8006e SW |
2312 | return 0; |
2313 | } | |
38941f80 | 2314 | |
4740a623 | 2315 | BUG_ON(!con->in_msg); |
38941f80 | 2316 | BUG_ON(con->in_msg->con != con); |
31b8006e SW |
2317 | m = con->in_msg; |
2318 | m->front.iov_len = 0; /* haven't read it yet */ | |
2450418c YS |
2319 | if (m->middle) |
2320 | m->middle->vec.iov_len = 0; | |
9d7f0f13 | 2321 | |
78625051 | 2322 | /* prepare for data payload, if any */ |
a4107026 | 2323 | |
78625051 | 2324 | if (data_len) |
98fa5dd8 | 2325 | prepare_message_data(con->in_msg, data_len); |
31b8006e SW |
2326 | } |
2327 | ||
2328 | /* front */ | |
2450418c YS |
2329 | ret = read_partial_message_section(con, &m->front, front_len, |
2330 | &con->in_front_crc); | |
2331 | if (ret <= 0) | |
2332 | return ret; | |
31b8006e SW |
2333 | |
2334 | /* middle */ | |
2450418c | 2335 | if (m->middle) { |
213c99ee SW |
2336 | ret = read_partial_message_section(con, &m->middle->vec, |
2337 | middle_len, | |
2450418c | 2338 | &con->in_middle_crc); |
31b8006e SW |
2339 | if (ret <= 0) |
2340 | return ret; | |
31b8006e SW |
2341 | } |
2342 | ||
2343 | /* (page) data */ | |
34d2d200 AE |
2344 | if (data_len) { |
2345 | ret = read_partial_msg_data(con); | |
2346 | if (ret <= 0) | |
2347 | return ret; | |
31b8006e SW |
2348 | } |
2349 | ||
31b8006e | 2350 | /* footer */ |
fd51653f AE |
2351 | size = sizeof (m->footer); |
2352 | end += size; | |
2353 | ret = read_partial(con, end, size, &m->footer); | |
57dac9d1 AE |
2354 | if (ret <= 0) |
2355 | return ret; | |
2356 | ||
31b8006e SW |
2357 | dout("read_partial_message got msg %p %d (%u) + %d (%u) + %d (%u)\n", |
2358 | m, front_len, m->footer.front_crc, middle_len, | |
2359 | m->footer.middle_crc, data_len, m->footer.data_crc); | |
2360 | ||
2361 | /* crc ok? */ | |
2362 | if (con->in_front_crc != le32_to_cpu(m->footer.front_crc)) { | |
2363 | pr_err("read_partial_message %p front crc %u != exp. %u\n", | |
2364 | m, con->in_front_crc, m->footer.front_crc); | |
2365 | return -EBADMSG; | |
2366 | } | |
2367 | if (con->in_middle_crc != le32_to_cpu(m->footer.middle_crc)) { | |
2368 | pr_err("read_partial_message %p middle crc %u != exp %u\n", | |
2369 | m, con->in_middle_crc, m->footer.middle_crc); | |
2370 | return -EBADMSG; | |
2371 | } | |
bca064d2 | 2372 | if (do_datacrc && |
31b8006e SW |
2373 | (m->footer.flags & CEPH_MSG_FOOTER_NOCRC) == 0 && |
2374 | con->in_data_crc != le32_to_cpu(m->footer.data_crc)) { | |
2375 | pr_err("read_partial_message %p data crc %u != exp. %u\n", m, | |
2376 | con->in_data_crc, le32_to_cpu(m->footer.data_crc)); | |
2377 | return -EBADMSG; | |
2378 | } | |
2379 | ||
2380 | return 1; /* done! */ | |
2381 | } | |
2382 | ||
2383 | /* | |
2384 | * Process message. This happens in the worker thread. The callback should | |
2385 | * be careful not to do anything that waits on other incoming messages or it | |
2386 | * may deadlock. | |
2387 | */ | |
2388 | static void process_message(struct ceph_connection *con) | |
2389 | { | |
5e095e8b | 2390 | struct ceph_msg *msg; |
31b8006e | 2391 | |
38941f80 AE |
2392 | BUG_ON(con->in_msg->con != con); |
2393 | con->in_msg->con = NULL; | |
5e095e8b | 2394 | msg = con->in_msg; |
31b8006e | 2395 | con->in_msg = NULL; |
36eb71aa | 2396 | con->ops->put(con); |
31b8006e SW |
2397 | |
2398 | /* if first message, set peer_name */ | |
2399 | if (con->peer_name.type == 0) | |
dbad185d | 2400 | con->peer_name = msg->hdr.src; |
31b8006e | 2401 | |
31b8006e | 2402 | con->in_seq++; |
ec302645 | 2403 | mutex_unlock(&con->mutex); |
31b8006e SW |
2404 | |
2405 | dout("===== %p %llu from %s%lld %d=%s len %d+%d (%u %u %u) =====\n", | |
2406 | msg, le64_to_cpu(msg->hdr.seq), | |
dbad185d | 2407 | ENTITY_NAME(msg->hdr.src), |
31b8006e SW |
2408 | le16_to_cpu(msg->hdr.type), |
2409 | ceph_msg_type_name(le16_to_cpu(msg->hdr.type)), | |
2410 | le32_to_cpu(msg->hdr.front_len), | |
2411 | le32_to_cpu(msg->hdr.data_len), | |
2412 | con->in_front_crc, con->in_middle_crc, con->in_data_crc); | |
2413 | con->ops->dispatch(con, msg); | |
ec302645 SW |
2414 | |
2415 | mutex_lock(&con->mutex); | |
31b8006e SW |
2416 | } |
2417 | ||
2418 | ||
2419 | /* | |
2420 | * Write something to the socket. Called in a worker thread when the | |
2421 | * socket appears to be writeable and we have something ready to send. | |
2422 | */ | |
2423 | static int try_write(struct ceph_connection *con) | |
2424 | { | |
31b8006e SW |
2425 | int ret = 1; |
2426 | ||
d59315ca | 2427 | dout("try_write start %p state %lu\n", con, con->state); |
31b8006e | 2428 | |
31b8006e SW |
2429 | more: |
2430 | dout("try_write out_kvec_bytes %d\n", con->out_kvec_bytes); | |
2431 | ||
2432 | /* open the socket first? */ | |
8dacc7da SW |
2433 | if (con->state == CON_STATE_PREOPEN) { |
2434 | BUG_ON(con->sock); | |
2435 | con->state = CON_STATE_CONNECTING; | |
a5988c49 | 2436 | |
e2200423 | 2437 | con_out_kvec_reset(con); |
e825a66d | 2438 | prepare_write_banner(con); |
eed0ef2c | 2439 | prepare_read_banner(con); |
31b8006e | 2440 | |
cf3e5c40 | 2441 | BUG_ON(con->in_msg); |
31b8006e SW |
2442 | con->in_tag = CEPH_MSGR_TAG_READY; |
2443 | dout("try_write initiating connect on %p new state %lu\n", | |
2444 | con, con->state); | |
41617d0c AE |
2445 | ret = ceph_tcp_connect(con); |
2446 | if (ret < 0) { | |
31b8006e | 2447 | con->error_msg = "connect error"; |
31b8006e SW |
2448 | goto out; |
2449 | } | |
2450 | } | |
2451 | ||
2452 | more_kvec: | |
2453 | /* kvec data queued? */ | |
2454 | if (con->out_skip) { | |
2455 | ret = write_partial_skip(con); | |
2456 | if (ret <= 0) | |
42961d23 | 2457 | goto out; |
31b8006e SW |
2458 | } |
2459 | if (con->out_kvec_left) { | |
2460 | ret = write_partial_kvec(con); | |
2461 | if (ret <= 0) | |
42961d23 | 2462 | goto out; |
31b8006e SW |
2463 | } |
2464 | ||
2465 | /* msg pages? */ | |
2466 | if (con->out_msg) { | |
c86a2930 SW |
2467 | if (con->out_msg_done) { |
2468 | ceph_msg_put(con->out_msg); | |
2469 | con->out_msg = NULL; /* we're done with this one */ | |
2470 | goto do_next; | |
2471 | } | |
2472 | ||
34d2d200 | 2473 | ret = write_partial_message_data(con); |
31b8006e SW |
2474 | if (ret == 1) |
2475 | goto more_kvec; /* we need to send the footer, too! */ | |
2476 | if (ret == 0) | |
42961d23 | 2477 | goto out; |
31b8006e | 2478 | if (ret < 0) { |
34d2d200 | 2479 | dout("try_write write_partial_message_data err %d\n", |
31b8006e | 2480 | ret); |
42961d23 | 2481 | goto out; |
31b8006e SW |
2482 | } |
2483 | } | |
2484 | ||
c86a2930 | 2485 | do_next: |
8dacc7da | 2486 | if (con->state == CON_STATE_OPEN) { |
31b8006e SW |
2487 | /* is anything else pending? */ |
2488 | if (!list_empty(&con->out_queue)) { | |
2489 | prepare_write_message(con); | |
2490 | goto more; | |
2491 | } | |
2492 | if (con->in_seq > con->in_seq_acked) { | |
2493 | prepare_write_ack(con); | |
2494 | goto more; | |
2495 | } | |
c9ffc77a | 2496 | if (con_flag_test_and_clear(con, CON_FLAG_KEEPALIVE_PENDING)) { |
31b8006e SW |
2497 | prepare_write_keepalive(con); |
2498 | goto more; | |
2499 | } | |
2500 | } | |
2501 | ||
2502 | /* Nothing to do! */ | |
c9ffc77a | 2503 | con_flag_clear(con, CON_FLAG_WRITE_PENDING); |
31b8006e | 2504 | dout("try_write nothing else to write.\n"); |
31b8006e SW |
2505 | ret = 0; |
2506 | out: | |
42961d23 | 2507 | dout("try_write done on %p ret %d\n", con, ret); |
31b8006e SW |
2508 | return ret; |
2509 | } | |
2510 | ||
2511 | ||
2512 | ||
2513 | /* | |
2514 | * Read what we can from the socket. | |
2515 | */ | |
2516 | static int try_read(struct ceph_connection *con) | |
2517 | { | |
31b8006e SW |
2518 | int ret = -1; |
2519 | ||
8dacc7da SW |
2520 | more: |
2521 | dout("try_read start on %p state %lu\n", con, con->state); | |
2522 | if (con->state != CON_STATE_CONNECTING && | |
2523 | con->state != CON_STATE_NEGOTIATING && | |
2524 | con->state != CON_STATE_OPEN) | |
31b8006e SW |
2525 | return 0; |
2526 | ||
8dacc7da | 2527 | BUG_ON(!con->sock); |
ec302645 | 2528 | |
31b8006e SW |
2529 | dout("try_read tag %d in_base_pos %d\n", (int)con->in_tag, |
2530 | con->in_base_pos); | |
0da5d703 | 2531 | |
8dacc7da | 2532 | if (con->state == CON_STATE_CONNECTING) { |
7593af92 AE |
2533 | dout("try_read connecting\n"); |
2534 | ret = read_partial_banner(con); | |
2535 | if (ret <= 0) | |
ab166d5a | 2536 | goto out; |
7593af92 AE |
2537 | ret = process_banner(con); |
2538 | if (ret < 0) | |
2539 | goto out; | |
2540 | ||
8dacc7da | 2541 | con->state = CON_STATE_NEGOTIATING; |
7593af92 | 2542 | |
6d4221b5 JS |
2543 | /* |
2544 | * Received banner is good, exchange connection info. | |
2545 | * Do not reset out_kvec, as sending our banner raced | |
2546 | * with receiving peer banner after connect completed. | |
2547 | */ | |
7593af92 AE |
2548 | ret = prepare_write_connect(con); |
2549 | if (ret < 0) | |
2550 | goto out; | |
2551 | prepare_read_connect(con); | |
2552 | ||
2553 | /* Send connection info before awaiting response */ | |
0da5d703 SW |
2554 | goto out; |
2555 | } | |
2556 | ||
8dacc7da | 2557 | if (con->state == CON_STATE_NEGOTIATING) { |
7593af92 | 2558 | dout("try_read negotiating\n"); |
31b8006e SW |
2559 | ret = read_partial_connect(con); |
2560 | if (ret <= 0) | |
31b8006e | 2561 | goto out; |
98bdb0aa SW |
2562 | ret = process_connect(con); |
2563 | if (ret < 0) | |
2564 | goto out; | |
31b8006e SW |
2565 | goto more; |
2566 | } | |
2567 | ||
122070a2 | 2568 | WARN_ON(con->state != CON_STATE_OPEN); |
8dacc7da | 2569 | |
31b8006e SW |
2570 | if (con->in_base_pos < 0) { |
2571 | /* | |
2572 | * skipping + discarding content. | |
2573 | * | |
2574 | * FIXME: there must be a better way to do this! | |
2575 | */ | |
84495f49 AE |
2576 | static char buf[SKIP_BUF_SIZE]; |
2577 | int skip = min((int) sizeof (buf), -con->in_base_pos); | |
2578 | ||
31b8006e SW |
2579 | dout("skipping %d / %d bytes\n", skip, -con->in_base_pos); |
2580 | ret = ceph_tcp_recvmsg(con->sock, buf, skip); | |
2581 | if (ret <= 0) | |
98bdb0aa | 2582 | goto out; |
31b8006e SW |
2583 | con->in_base_pos += ret; |
2584 | if (con->in_base_pos) | |
2585 | goto more; | |
2586 | } | |
2587 | if (con->in_tag == CEPH_MSGR_TAG_READY) { | |
2588 | /* | |
2589 | * what's next? | |
2590 | */ | |
2591 | ret = ceph_tcp_recvmsg(con->sock, &con->in_tag, 1); | |
2592 | if (ret <= 0) | |
98bdb0aa | 2593 | goto out; |
31b8006e SW |
2594 | dout("try_read got tag %d\n", (int)con->in_tag); |
2595 | switch (con->in_tag) { | |
2596 | case CEPH_MSGR_TAG_MSG: | |
2597 | prepare_read_message(con); | |
2598 | break; | |
2599 | case CEPH_MSGR_TAG_ACK: | |
2600 | prepare_read_ack(con); | |
2601 | break; | |
2602 | case CEPH_MSGR_TAG_CLOSE: | |
8dacc7da SW |
2603 | con_close_socket(con); |
2604 | con->state = CON_STATE_CLOSED; | |
98bdb0aa | 2605 | goto out; |
31b8006e SW |
2606 | default: |
2607 | goto bad_tag; | |
2608 | } | |
2609 | } | |
2610 | if (con->in_tag == CEPH_MSGR_TAG_MSG) { | |
2611 | ret = read_partial_message(con); | |
2612 | if (ret <= 0) { | |
2613 | switch (ret) { | |
2614 | case -EBADMSG: | |
2615 | con->error_msg = "bad crc"; | |
2616 | ret = -EIO; | |
98bdb0aa | 2617 | break; |
31b8006e SW |
2618 | case -EIO: |
2619 | con->error_msg = "io error"; | |
98bdb0aa | 2620 | break; |
31b8006e | 2621 | } |
98bdb0aa | 2622 | goto out; |
31b8006e SW |
2623 | } |
2624 | if (con->in_tag == CEPH_MSGR_TAG_READY) | |
2625 | goto more; | |
2626 | process_message(con); | |
7b862e07 SW |
2627 | if (con->state == CON_STATE_OPEN) |
2628 | prepare_read_tag(con); | |
31b8006e SW |
2629 | goto more; |
2630 | } | |
3a23083b SW |
2631 | if (con->in_tag == CEPH_MSGR_TAG_ACK || |
2632 | con->in_tag == CEPH_MSGR_TAG_SEQ) { | |
2633 | /* | |
2634 | * the final handshake seq exchange is semantically | |
2635 | * equivalent to an ACK | |
2636 | */ | |
31b8006e SW |
2637 | ret = read_partial_ack(con); |
2638 | if (ret <= 0) | |
98bdb0aa | 2639 | goto out; |
31b8006e SW |
2640 | process_ack(con); |
2641 | goto more; | |
2642 | } | |
2643 | ||
31b8006e | 2644 | out: |
98bdb0aa | 2645 | dout("try_read done on %p ret %d\n", con, ret); |
31b8006e SW |
2646 | return ret; |
2647 | ||
2648 | bad_tag: | |
2649 | pr_err("try_read bad con->in_tag = %d\n", (int)con->in_tag); | |
2650 | con->error_msg = "protocol error, garbage tag"; | |
2651 | ret = -1; | |
2652 | goto out; | |
2653 | } | |
2654 | ||
2655 | ||
2656 | /* | |
802c6d96 AE |
2657 | * Atomically queue work on a connection after the specified delay. |
2658 | * Bump @con reference to avoid races with connection teardown. | |
2659 | * Returns 0 if work was queued, or an error code otherwise. | |
31b8006e | 2660 | */ |
802c6d96 | 2661 | static int queue_con_delay(struct ceph_connection *con, unsigned long delay) |
31b8006e | 2662 | { |
31b8006e | 2663 | if (!con->ops->get(con)) { |
802c6d96 AE |
2664 | dout("%s %p ref count 0\n", __func__, con); |
2665 | ||
2666 | return -ENOENT; | |
31b8006e SW |
2667 | } |
2668 | ||
802c6d96 AE |
2669 | if (!queue_delayed_work(ceph_msgr_wq, &con->work, delay)) { |
2670 | dout("%s %p - already queued\n", __func__, con); | |
31b8006e | 2671 | con->ops->put(con); |
802c6d96 AE |
2672 | |
2673 | return -EBUSY; | |
31b8006e | 2674 | } |
802c6d96 AE |
2675 | |
2676 | dout("%s %p %lu\n", __func__, con, delay); | |
2677 | ||
2678 | return 0; | |
2679 | } | |
2680 | ||
2681 | static void queue_con(struct ceph_connection *con) | |
2682 | { | |
2683 | (void) queue_con_delay(con, 0); | |
31b8006e SW |
2684 | } |
2685 | ||
7bb21d68 AE |
2686 | static bool con_sock_closed(struct ceph_connection *con) |
2687 | { | |
c9ffc77a | 2688 | if (!con_flag_test_and_clear(con, CON_FLAG_SOCK_CLOSED)) |
7bb21d68 AE |
2689 | return false; |
2690 | ||
2691 | #define CASE(x) \ | |
2692 | case CON_STATE_ ## x: \ | |
2693 | con->error_msg = "socket closed (con state " #x ")"; \ | |
2694 | break; | |
2695 | ||
2696 | switch (con->state) { | |
2697 | CASE(CLOSED); | |
2698 | CASE(PREOPEN); | |
2699 | CASE(CONNECTING); | |
2700 | CASE(NEGOTIATING); | |
2701 | CASE(OPEN); | |
2702 | CASE(STANDBY); | |
2703 | default: | |
2704 | pr_warning("%s con %p unrecognized state %lu\n", | |
2705 | __func__, con, con->state); | |
2706 | con->error_msg = "unrecognized con state"; | |
2707 | BUG(); | |
2708 | break; | |
2709 | } | |
2710 | #undef CASE | |
2711 | ||
2712 | return true; | |
2713 | } | |
2714 | ||
f20a39fd AE |
2715 | static bool con_backoff(struct ceph_connection *con) |
2716 | { | |
2717 | int ret; | |
2718 | ||
2719 | if (!con_flag_test_and_clear(con, CON_FLAG_BACKOFF)) | |
2720 | return false; | |
2721 | ||
2722 | ret = queue_con_delay(con, round_jiffies_relative(con->delay)); | |
2723 | if (ret) { | |
2724 | dout("%s: con %p FAILED to back off %lu\n", __func__, | |
2725 | con, con->delay); | |
2726 | BUG_ON(ret == -ENOENT); | |
2727 | con_flag_set(con, CON_FLAG_BACKOFF); | |
2728 | } | |
2729 | ||
2730 | return true; | |
2731 | } | |
2732 | ||
93209264 AE |
2733 | /* Finish fault handling; con->mutex must *not* be held here */ |
2734 | ||
2735 | static void con_fault_finish(struct ceph_connection *con) | |
2736 | { | |
2737 | /* | |
2738 | * in case we faulted due to authentication, invalidate our | |
2739 | * current tickets so that we can get new ones. | |
2740 | */ | |
2741 | if (con->auth_retry && con->ops->invalidate_authorizer) { | |
2742 | dout("calling invalidate_authorizer()\n"); | |
2743 | con->ops->invalidate_authorizer(con); | |
2744 | } | |
2745 | ||
2746 | if (con->ops->fault) | |
2747 | con->ops->fault(con); | |
2748 | } | |
2749 | ||
31b8006e SW |
2750 | /* |
2751 | * Do some work on a connection. Drop a connection ref when we're done. | |
2752 | */ | |
2753 | static void con_work(struct work_struct *work) | |
2754 | { | |
2755 | struct ceph_connection *con = container_of(work, struct ceph_connection, | |
2756 | work.work); | |
49659416 | 2757 | bool fault; |
31b8006e | 2758 | |
9dd4658d | 2759 | mutex_lock(&con->mutex); |
49659416 AE |
2760 | while (true) { |
2761 | int ret; | |
31b8006e | 2762 | |
49659416 AE |
2763 | if ((fault = con_sock_closed(con))) { |
2764 | dout("%s: con %p SOCK_CLOSED\n", __func__, con); | |
2765 | break; | |
2766 | } | |
2767 | if (con_backoff(con)) { | |
2768 | dout("%s: con %p BACKOFF\n", __func__, con); | |
2769 | break; | |
2770 | } | |
2771 | if (con->state == CON_STATE_STANDBY) { | |
2772 | dout("%s: con %p STANDBY\n", __func__, con); | |
2773 | break; | |
2774 | } | |
2775 | if (con->state == CON_STATE_CLOSED) { | |
2776 | dout("%s: con %p CLOSED\n", __func__, con); | |
2777 | BUG_ON(con->sock); | |
2778 | break; | |
2779 | } | |
2780 | if (con->state == CON_STATE_PREOPEN) { | |
2781 | dout("%s: con %p PREOPEN\n", __func__, con); | |
2782 | BUG_ON(con->sock); | |
2783 | } | |
0da5d703 | 2784 | |
49659416 AE |
2785 | ret = try_read(con); |
2786 | if (ret < 0) { | |
2787 | if (ret == -EAGAIN) | |
2788 | continue; | |
2789 | con->error_msg = "socket error on read"; | |
2790 | fault = true; | |
2791 | break; | |
2792 | } | |
2793 | ||
2794 | ret = try_write(con); | |
2795 | if (ret < 0) { | |
2796 | if (ret == -EAGAIN) | |
2797 | continue; | |
2798 | con->error_msg = "socket error on write"; | |
2799 | fault = true; | |
2800 | } | |
2801 | ||
2802 | break; /* If we make it to here, we're done */ | |
3a140a0d | 2803 | } |
b6e7b6a1 AE |
2804 | if (fault) |
2805 | con_fault(con); | |
9dd4658d | 2806 | mutex_unlock(&con->mutex); |
0da5d703 | 2807 | |
b6e7b6a1 AE |
2808 | if (fault) |
2809 | con_fault_finish(con); | |
2810 | ||
2811 | con->ops->put(con); | |
31b8006e SW |
2812 | } |
2813 | ||
31b8006e SW |
2814 | /* |
2815 | * Generic error/fault handler. A retry mechanism is used with | |
2816 | * exponential backoff | |
2817 | */ | |
93209264 | 2818 | static void con_fault(struct ceph_connection *con) |
31b8006e | 2819 | { |
28362986 | 2820 | pr_warning("%s%lld %s %s\n", ENTITY_NAME(con->peer_name), |
3d14c5d2 | 2821 | ceph_pr_addr(&con->peer_addr.in_addr), con->error_msg); |
31b8006e | 2822 | dout("fault %p state %lu to peer %s\n", |
3d14c5d2 | 2823 | con, con->state, ceph_pr_addr(&con->peer_addr.in_addr)); |
31b8006e | 2824 | |
122070a2 | 2825 | WARN_ON(con->state != CON_STATE_CONNECTING && |
8dacc7da SW |
2826 | con->state != CON_STATE_NEGOTIATING && |
2827 | con->state != CON_STATE_OPEN); | |
ec302645 | 2828 | |
31b8006e | 2829 | con_close_socket(con); |
5e095e8b | 2830 | |
c9ffc77a | 2831 | if (con_flag_test(con, CON_FLAG_LOSSYTX)) { |
8dacc7da SW |
2832 | dout("fault on LOSSYTX channel, marking CLOSED\n"); |
2833 | con->state = CON_STATE_CLOSED; | |
93209264 | 2834 | return; |
3b5ede07 SW |
2835 | } |
2836 | ||
5e095e8b | 2837 | if (con->in_msg) { |
38941f80 AE |
2838 | BUG_ON(con->in_msg->con != con); |
2839 | con->in_msg->con = NULL; | |
5e095e8b SW |
2840 | ceph_msg_put(con->in_msg); |
2841 | con->in_msg = NULL; | |
36eb71aa | 2842 | con->ops->put(con); |
5e095e8b | 2843 | } |
31b8006e | 2844 | |
e80a52d1 SW |
2845 | /* Requeue anything that hasn't been acked */ |
2846 | list_splice_init(&con->out_sent, &con->out_queue); | |
9bd2e6f8 | 2847 | |
e76661d0 SW |
2848 | /* If there are no messages queued or keepalive pending, place |
2849 | * the connection in a STANDBY state */ | |
2850 | if (list_empty(&con->out_queue) && | |
c9ffc77a | 2851 | !con_flag_test(con, CON_FLAG_KEEPALIVE_PENDING)) { |
e00de341 | 2852 | dout("fault %p setting STANDBY clearing WRITE_PENDING\n", con); |
c9ffc77a | 2853 | con_flag_clear(con, CON_FLAG_WRITE_PENDING); |
8dacc7da | 2854 | con->state = CON_STATE_STANDBY; |
e80a52d1 SW |
2855 | } else { |
2856 | /* retry after a delay. */ | |
8dacc7da | 2857 | con->state = CON_STATE_PREOPEN; |
e80a52d1 SW |
2858 | if (con->delay == 0) |
2859 | con->delay = BASE_DELAY_INTERVAL; | |
2860 | else if (con->delay < MAX_DELAY_INTERVAL) | |
2861 | con->delay *= 2; | |
c9ffc77a | 2862 | con_flag_set(con, CON_FLAG_BACKOFF); |
8618e30b | 2863 | queue_con(con); |
31b8006e | 2864 | } |
31b8006e SW |
2865 | } |
2866 | ||
2867 | ||
2868 | ||
2869 | /* | |
15d9882c | 2870 | * initialize a new messenger instance |
31b8006e | 2871 | */ |
15d9882c AE |
2872 | void ceph_messenger_init(struct ceph_messenger *msgr, |
2873 | struct ceph_entity_addr *myaddr, | |
2874 | u32 supported_features, | |
2875 | u32 required_features, | |
2876 | bool nocrc) | |
31b8006e | 2877 | { |
3d14c5d2 YS |
2878 | msgr->supported_features = supported_features; |
2879 | msgr->required_features = required_features; | |
2880 | ||
31b8006e SW |
2881 | spin_lock_init(&msgr->global_seq_lock); |
2882 | ||
31b8006e SW |
2883 | if (myaddr) |
2884 | msgr->inst.addr = *myaddr; | |
2885 | ||
2886 | /* select a random nonce */ | |
ac8839d7 | 2887 | msgr->inst.addr.type = 0; |
103e2d3a | 2888 | get_random_bytes(&msgr->inst.addr.nonce, sizeof(msgr->inst.addr.nonce)); |
63f2d211 | 2889 | encode_my_addr(msgr); |
15d9882c | 2890 | msgr->nocrc = nocrc; |
31b8006e | 2891 | |
a2a32584 | 2892 | atomic_set(&msgr->stopping, 0); |
31b8006e | 2893 | |
15d9882c | 2894 | dout("%s %p\n", __func__, msgr); |
31b8006e | 2895 | } |
15d9882c | 2896 | EXPORT_SYMBOL(ceph_messenger_init); |
31b8006e | 2897 | |
e00de341 SW |
2898 | static void clear_standby(struct ceph_connection *con) |
2899 | { | |
2900 | /* come back from STANDBY? */ | |
8dacc7da | 2901 | if (con->state == CON_STATE_STANDBY) { |
e00de341 | 2902 | dout("clear_standby %p and ++connect_seq\n", con); |
8dacc7da | 2903 | con->state = CON_STATE_PREOPEN; |
e00de341 | 2904 | con->connect_seq++; |
c9ffc77a AE |
2905 | WARN_ON(con_flag_test(con, CON_FLAG_WRITE_PENDING)); |
2906 | WARN_ON(con_flag_test(con, CON_FLAG_KEEPALIVE_PENDING)); | |
e00de341 SW |
2907 | } |
2908 | } | |
2909 | ||
31b8006e SW |
2910 | /* |
2911 | * Queue up an outgoing message on the given connection. | |
2912 | */ | |
2913 | void ceph_con_send(struct ceph_connection *con, struct ceph_msg *msg) | |
2914 | { | |
31b8006e | 2915 | /* set src+dst */ |
dbad185d | 2916 | msg->hdr.src = con->msgr->inst.name; |
3ca02ef9 | 2917 | BUG_ON(msg->front.iov_len != le32_to_cpu(msg->hdr.front_len)); |
e84346b7 SW |
2918 | msg->needs_out_seq = true; |
2919 | ||
ec302645 | 2920 | mutex_lock(&con->mutex); |
92ce034b | 2921 | |
8dacc7da | 2922 | if (con->state == CON_STATE_CLOSED) { |
a59b55a6 SW |
2923 | dout("con_send %p closed, dropping %p\n", con, msg); |
2924 | ceph_msg_put(msg); | |
2925 | mutex_unlock(&con->mutex); | |
2926 | return; | |
2927 | } | |
2928 | ||
38941f80 | 2929 | BUG_ON(msg->con != NULL); |
36eb71aa | 2930 | msg->con = con->ops->get(con); |
92ce034b AE |
2931 | BUG_ON(msg->con == NULL); |
2932 | ||
31b8006e SW |
2933 | BUG_ON(!list_empty(&msg->list_head)); |
2934 | list_add_tail(&msg->list_head, &con->out_queue); | |
2935 | dout("----- %p to %s%lld %d=%s len %d+%d+%d -----\n", msg, | |
2936 | ENTITY_NAME(con->peer_name), le16_to_cpu(msg->hdr.type), | |
2937 | ceph_msg_type_name(le16_to_cpu(msg->hdr.type)), | |
2938 | le32_to_cpu(msg->hdr.front_len), | |
2939 | le32_to_cpu(msg->hdr.middle_len), | |
2940 | le32_to_cpu(msg->hdr.data_len)); | |
00650931 SW |
2941 | |
2942 | clear_standby(con); | |
ec302645 | 2943 | mutex_unlock(&con->mutex); |
31b8006e SW |
2944 | |
2945 | /* if there wasn't anything waiting to send before, queue | |
2946 | * new work */ | |
c9ffc77a | 2947 | if (con_flag_test_and_set(con, CON_FLAG_WRITE_PENDING) == 0) |
31b8006e SW |
2948 | queue_con(con); |
2949 | } | |
3d14c5d2 | 2950 | EXPORT_SYMBOL(ceph_con_send); |
31b8006e SW |
2951 | |
2952 | /* | |
2953 | * Revoke a message that was previously queued for send | |
2954 | */ | |
6740a845 | 2955 | void ceph_msg_revoke(struct ceph_msg *msg) |
31b8006e | 2956 | { |
6740a845 AE |
2957 | struct ceph_connection *con = msg->con; |
2958 | ||
2959 | if (!con) | |
2960 | return; /* Message not in our possession */ | |
2961 | ||
ec302645 | 2962 | mutex_lock(&con->mutex); |
31b8006e | 2963 | if (!list_empty(&msg->list_head)) { |
38941f80 | 2964 | dout("%s %p msg %p - was on queue\n", __func__, con, msg); |
31b8006e | 2965 | list_del_init(&msg->list_head); |
38941f80 | 2966 | BUG_ON(msg->con == NULL); |
36eb71aa | 2967 | msg->con->ops->put(msg->con); |
38941f80 | 2968 | msg->con = NULL; |
31b8006e | 2969 | msg->hdr.seq = 0; |
38941f80 | 2970 | |
31b8006e | 2971 | ceph_msg_put(msg); |
ed98adad SW |
2972 | } |
2973 | if (con->out_msg == msg) { | |
38941f80 | 2974 | dout("%s %p msg %p - was sending\n", __func__, con, msg); |
ed98adad | 2975 | con->out_msg = NULL; |
31b8006e SW |
2976 | if (con->out_kvec_is_msg) { |
2977 | con->out_skip = con->out_kvec_bytes; | |
2978 | con->out_kvec_is_msg = false; | |
2979 | } | |
ed98adad | 2980 | msg->hdr.seq = 0; |
92ce034b AE |
2981 | |
2982 | ceph_msg_put(msg); | |
31b8006e | 2983 | } |
ec302645 | 2984 | mutex_unlock(&con->mutex); |
31b8006e SW |
2985 | } |
2986 | ||
350b1c32 | 2987 | /* |
0d59ab81 | 2988 | * Revoke a message that we may be reading data into |
350b1c32 | 2989 | */ |
8921d114 | 2990 | void ceph_msg_revoke_incoming(struct ceph_msg *msg) |
350b1c32 | 2991 | { |
8921d114 AE |
2992 | struct ceph_connection *con; |
2993 | ||
2994 | BUG_ON(msg == NULL); | |
2995 | if (!msg->con) { | |
2996 | dout("%s msg %p null con\n", __func__, msg); | |
2997 | ||
2998 | return; /* Message not in our possession */ | |
2999 | } | |
3000 | ||
3001 | con = msg->con; | |
350b1c32 | 3002 | mutex_lock(&con->mutex); |
8921d114 | 3003 | if (con->in_msg == msg) { |
95c96174 ED |
3004 | unsigned int front_len = le32_to_cpu(con->in_hdr.front_len); |
3005 | unsigned int middle_len = le32_to_cpu(con->in_hdr.middle_len); | |
3006 | unsigned int data_len = le32_to_cpu(con->in_hdr.data_len); | |
350b1c32 SW |
3007 | |
3008 | /* skip rest of message */ | |
8921d114 AE |
3009 | dout("%s %p msg %p revoked\n", __func__, con, msg); |
3010 | con->in_base_pos = con->in_base_pos - | |
350b1c32 | 3011 | sizeof(struct ceph_msg_header) - |
0d59ab81 YS |
3012 | front_len - |
3013 | middle_len - | |
3014 | data_len - | |
350b1c32 | 3015 | sizeof(struct ceph_msg_footer); |
350b1c32 SW |
3016 | ceph_msg_put(con->in_msg); |
3017 | con->in_msg = NULL; | |
3018 | con->in_tag = CEPH_MSGR_TAG_READY; | |
684be25c | 3019 | con->in_seq++; |
350b1c32 | 3020 | } else { |
8921d114 AE |
3021 | dout("%s %p in_msg %p msg %p no-op\n", |
3022 | __func__, con, con->in_msg, msg); | |
350b1c32 SW |
3023 | } |
3024 | mutex_unlock(&con->mutex); | |
3025 | } | |
3026 | ||
31b8006e SW |
3027 | /* |
3028 | * Queue a keepalive byte to ensure the tcp connection is alive. | |
3029 | */ | |
3030 | void ceph_con_keepalive(struct ceph_connection *con) | |
3031 | { | |
e00de341 | 3032 | dout("con_keepalive %p\n", con); |
00650931 | 3033 | mutex_lock(&con->mutex); |
e00de341 | 3034 | clear_standby(con); |
00650931 | 3035 | mutex_unlock(&con->mutex); |
c9ffc77a AE |
3036 | if (con_flag_test_and_set(con, CON_FLAG_KEEPALIVE_PENDING) == 0 && |
3037 | con_flag_test_and_set(con, CON_FLAG_WRITE_PENDING) == 0) | |
31b8006e SW |
3038 | queue_con(con); |
3039 | } | |
3d14c5d2 | 3040 | EXPORT_SYMBOL(ceph_con_keepalive); |
31b8006e | 3041 | |
6644ed7b | 3042 | static struct ceph_msg_data *ceph_msg_data_create(enum ceph_msg_data_type type) |
43794509 | 3043 | { |
6644ed7b AE |
3044 | struct ceph_msg_data *data; |
3045 | ||
3046 | if (WARN_ON(!ceph_msg_data_type_valid(type))) | |
3047 | return NULL; | |
3048 | ||
81b36be4 | 3049 | data = kmem_cache_zalloc(ceph_msg_data_cache, GFP_NOFS); |
6644ed7b AE |
3050 | if (data) |
3051 | data->type = type; | |
5240d9f9 | 3052 | INIT_LIST_HEAD(&data->links); |
6644ed7b AE |
3053 | |
3054 | return data; | |
3055 | } | |
3056 | ||
3057 | static void ceph_msg_data_destroy(struct ceph_msg_data *data) | |
3058 | { | |
3059 | if (!data) | |
3060 | return; | |
3061 | ||
5240d9f9 | 3062 | WARN_ON(!list_empty(&data->links)); |
6644ed7b AE |
3063 | if (data->type == CEPH_MSG_DATA_PAGELIST) { |
3064 | ceph_pagelist_release(data->pagelist); | |
3065 | kfree(data->pagelist); | |
3066 | } | |
81b36be4 | 3067 | kmem_cache_free(ceph_msg_data_cache, data); |
43794509 AE |
3068 | } |
3069 | ||
90af3602 | 3070 | void ceph_msg_data_add_pages(struct ceph_msg *msg, struct page **pages, |
f1baeb2b | 3071 | size_t length, size_t alignment) |
02afca6c | 3072 | { |
6644ed7b AE |
3073 | struct ceph_msg_data *data; |
3074 | ||
07aa1558 AE |
3075 | BUG_ON(!pages); |
3076 | BUG_ON(!length); | |
6644ed7b AE |
3077 | |
3078 | data = ceph_msg_data_create(CEPH_MSG_DATA_PAGES); | |
3079 | BUG_ON(!data); | |
3080 | data->pages = pages; | |
3081 | data->length = length; | |
3082 | data->alignment = alignment & ~PAGE_MASK; | |
02afca6c | 3083 | |
5240d9f9 AE |
3084 | list_add_tail(&data->links, &msg->data); |
3085 | msg->data_length += length; | |
02afca6c | 3086 | } |
90af3602 | 3087 | EXPORT_SYMBOL(ceph_msg_data_add_pages); |
31b8006e | 3088 | |
90af3602 | 3089 | void ceph_msg_data_add_pagelist(struct ceph_msg *msg, |
27fa8385 AE |
3090 | struct ceph_pagelist *pagelist) |
3091 | { | |
6644ed7b AE |
3092 | struct ceph_msg_data *data; |
3093 | ||
07aa1558 AE |
3094 | BUG_ON(!pagelist); |
3095 | BUG_ON(!pagelist->length); | |
27fa8385 | 3096 | |
6644ed7b AE |
3097 | data = ceph_msg_data_create(CEPH_MSG_DATA_PAGELIST); |
3098 | BUG_ON(!data); | |
3099 | data->pagelist = pagelist; | |
3100 | ||
5240d9f9 AE |
3101 | list_add_tail(&data->links, &msg->data); |
3102 | msg->data_length += pagelist->length; | |
27fa8385 | 3103 | } |
90af3602 | 3104 | EXPORT_SYMBOL(ceph_msg_data_add_pagelist); |
27fa8385 | 3105 | |
ea96571f | 3106 | #ifdef CONFIG_BLOCK |
90af3602 | 3107 | void ceph_msg_data_add_bio(struct ceph_msg *msg, struct bio *bio, |
a1930804 | 3108 | size_t length) |
27fa8385 | 3109 | { |
6644ed7b AE |
3110 | struct ceph_msg_data *data; |
3111 | ||
07aa1558 | 3112 | BUG_ON(!bio); |
27fa8385 | 3113 | |
6644ed7b AE |
3114 | data = ceph_msg_data_create(CEPH_MSG_DATA_BIO); |
3115 | BUG_ON(!data); | |
3116 | data->bio = bio; | |
c851c495 | 3117 | data->bio_length = length; |
6644ed7b | 3118 | |
5240d9f9 AE |
3119 | list_add_tail(&data->links, &msg->data); |
3120 | msg->data_length += length; | |
27fa8385 | 3121 | } |
90af3602 | 3122 | EXPORT_SYMBOL(ceph_msg_data_add_bio); |
ea96571f | 3123 | #endif /* CONFIG_BLOCK */ |
27fa8385 | 3124 | |
31b8006e SW |
3125 | /* |
3126 | * construct a new message with given type, size | |
3127 | * the new msg has a ref count of 1. | |
3128 | */ | |
b61c2763 SW |
3129 | struct ceph_msg *ceph_msg_new(int type, int front_len, gfp_t flags, |
3130 | bool can_fail) | |
31b8006e SW |
3131 | { |
3132 | struct ceph_msg *m; | |
3133 | ||
e3d5d638 | 3134 | m = kmem_cache_zalloc(ceph_msg_cache, flags); |
31b8006e SW |
3135 | if (m == NULL) |
3136 | goto out; | |
31b8006e SW |
3137 | |
3138 | m->hdr.type = cpu_to_le16(type); | |
45c6ceb5 | 3139 | m->hdr.priority = cpu_to_le16(CEPH_MSG_PRIO_DEFAULT); |
31b8006e | 3140 | m->hdr.front_len = cpu_to_le32(front_len); |
ca20892d | 3141 | |
9516e45b AE |
3142 | INIT_LIST_HEAD(&m->list_head); |
3143 | kref_init(&m->kref); | |
5240d9f9 | 3144 | INIT_LIST_HEAD(&m->data); |
ca20892d | 3145 | |
31b8006e | 3146 | /* front */ |
9516e45b | 3147 | m->front_max = front_len; |
31b8006e SW |
3148 | if (front_len) { |
3149 | if (front_len > PAGE_CACHE_SIZE) { | |
34d23762 | 3150 | m->front.iov_base = __vmalloc(front_len, flags, |
31b8006e SW |
3151 | PAGE_KERNEL); |
3152 | m->front_is_vmalloc = true; | |
3153 | } else { | |
34d23762 | 3154 | m->front.iov_base = kmalloc(front_len, flags); |
31b8006e SW |
3155 | } |
3156 | if (m->front.iov_base == NULL) { | |
b61c2763 | 3157 | dout("ceph_msg_new can't allocate %d bytes\n", |
31b8006e SW |
3158 | front_len); |
3159 | goto out2; | |
3160 | } | |
3161 | } else { | |
3162 | m->front.iov_base = NULL; | |
3163 | } | |
3164 | m->front.iov_len = front_len; | |
3165 | ||
bb257664 | 3166 | dout("ceph_msg_new %p front %d\n", m, front_len); |
31b8006e SW |
3167 | return m; |
3168 | ||
3169 | out2: | |
3170 | ceph_msg_put(m); | |
3171 | out: | |
b61c2763 SW |
3172 | if (!can_fail) { |
3173 | pr_err("msg_new can't create type %d front %d\n", type, | |
3174 | front_len); | |
f0ed1b7c | 3175 | WARN_ON(1); |
b61c2763 SW |
3176 | } else { |
3177 | dout("msg_new can't create type %d front %d\n", type, | |
3178 | front_len); | |
3179 | } | |
a79832f2 | 3180 | return NULL; |
31b8006e | 3181 | } |
3d14c5d2 | 3182 | EXPORT_SYMBOL(ceph_msg_new); |
31b8006e | 3183 | |
31b8006e SW |
3184 | /* |
3185 | * Allocate "middle" portion of a message, if it is needed and wasn't | |
3186 | * allocated by alloc_msg. This allows us to read a small fixed-size | |
3187 | * per-type header in the front and then gracefully fail (i.e., | |
3188 | * propagate the error to the caller based on info in the front) when | |
3189 | * the middle is too large. | |
3190 | */ | |
2450418c | 3191 | static int ceph_alloc_middle(struct ceph_connection *con, struct ceph_msg *msg) |
31b8006e SW |
3192 | { |
3193 | int type = le16_to_cpu(msg->hdr.type); | |
3194 | int middle_len = le32_to_cpu(msg->hdr.middle_len); | |
3195 | ||
3196 | dout("alloc_middle %p type %d %s middle_len %d\n", msg, type, | |
3197 | ceph_msg_type_name(type), middle_len); | |
3198 | BUG_ON(!middle_len); | |
3199 | BUG_ON(msg->middle); | |
3200 | ||
b6c1d5b8 | 3201 | msg->middle = ceph_buffer_new(middle_len, GFP_NOFS); |
31b8006e SW |
3202 | if (!msg->middle) |
3203 | return -ENOMEM; | |
3204 | return 0; | |
3205 | } | |
3206 | ||
2450418c | 3207 | /* |
1c20f2d2 AE |
3208 | * Allocate a message for receiving an incoming message on a |
3209 | * connection, and save the result in con->in_msg. Uses the | |
3210 | * connection's private alloc_msg op if available. | |
3211 | * | |
4740a623 SW |
3212 | * Returns 0 on success, or a negative error code. |
3213 | * | |
3214 | * On success, if we set *skip = 1: | |
3215 | * - the next message should be skipped and ignored. | |
3216 | * - con->in_msg == NULL | |
3217 | * or if we set *skip = 0: | |
3218 | * - con->in_msg is non-null. | |
3219 | * On error (ENOMEM, EAGAIN, ...), | |
3220 | * - con->in_msg == NULL | |
2450418c | 3221 | */ |
4740a623 | 3222 | static int ceph_con_in_msg_alloc(struct ceph_connection *con, int *skip) |
2450418c | 3223 | { |
4740a623 | 3224 | struct ceph_msg_header *hdr = &con->in_hdr; |
2450418c | 3225 | int middle_len = le32_to_cpu(hdr->middle_len); |
1d866d1c | 3226 | struct ceph_msg *msg; |
4740a623 | 3227 | int ret = 0; |
2450418c | 3228 | |
1c20f2d2 | 3229 | BUG_ON(con->in_msg != NULL); |
53ded495 | 3230 | BUG_ON(!con->ops->alloc_msg); |
2450418c | 3231 | |
53ded495 AE |
3232 | mutex_unlock(&con->mutex); |
3233 | msg = con->ops->alloc_msg(con, hdr, skip); | |
3234 | mutex_lock(&con->mutex); | |
3235 | if (con->state != CON_STATE_OPEN) { | |
3236 | if (msg) | |
1d866d1c | 3237 | ceph_msg_put(msg); |
53ded495 AE |
3238 | return -EAGAIN; |
3239 | } | |
4137577a AE |
3240 | if (msg) { |
3241 | BUG_ON(*skip); | |
3242 | con->in_msg = msg; | |
36eb71aa | 3243 | con->in_msg->con = con->ops->get(con); |
92ce034b | 3244 | BUG_ON(con->in_msg->con == NULL); |
4137577a AE |
3245 | } else { |
3246 | /* | |
3247 | * Null message pointer means either we should skip | |
3248 | * this message or we couldn't allocate memory. The | |
3249 | * former is not an error. | |
3250 | */ | |
3251 | if (*skip) | |
3252 | return 0; | |
3253 | con->error_msg = "error allocating memory for incoming message"; | |
3254 | ||
53ded495 | 3255 | return -ENOMEM; |
2450418c | 3256 | } |
1c20f2d2 | 3257 | memcpy(&con->in_msg->hdr, &con->in_hdr, sizeof(con->in_hdr)); |
2450418c | 3258 | |
1c20f2d2 AE |
3259 | if (middle_len && !con->in_msg->middle) { |
3260 | ret = ceph_alloc_middle(con, con->in_msg); | |
2450418c | 3261 | if (ret < 0) { |
1c20f2d2 AE |
3262 | ceph_msg_put(con->in_msg); |
3263 | con->in_msg = NULL; | |
2450418c YS |
3264 | } |
3265 | } | |
9d7f0f13 | 3266 | |
4740a623 | 3267 | return ret; |
2450418c YS |
3268 | } |
3269 | ||
31b8006e SW |
3270 | |
3271 | /* | |
3272 | * Free a generically kmalloc'd message. | |
3273 | */ | |
3274 | void ceph_msg_kfree(struct ceph_msg *m) | |
3275 | { | |
3276 | dout("msg_kfree %p\n", m); | |
3277 | if (m->front_is_vmalloc) | |
3278 | vfree(m->front.iov_base); | |
3279 | else | |
3280 | kfree(m->front.iov_base); | |
e3d5d638 | 3281 | kmem_cache_free(ceph_msg_cache, m); |
31b8006e SW |
3282 | } |
3283 | ||
3284 | /* | |
3285 | * Drop a msg ref. Destroy as needed. | |
3286 | */ | |
c2e552e7 SW |
3287 | void ceph_msg_last_put(struct kref *kref) |
3288 | { | |
3289 | struct ceph_msg *m = container_of(kref, struct ceph_msg, kref); | |
5240d9f9 AE |
3290 | LIST_HEAD(data); |
3291 | struct list_head *links; | |
3292 | struct list_head *next; | |
31b8006e | 3293 | |
c2e552e7 SW |
3294 | dout("ceph_msg_put last one on %p\n", m); |
3295 | WARN_ON(!list_empty(&m->list_head)); | |
3296 | ||
3297 | /* drop middle, data, if any */ | |
3298 | if (m->middle) { | |
3299 | ceph_buffer_put(m->middle); | |
3300 | m->middle = NULL; | |
31b8006e | 3301 | } |
5240d9f9 AE |
3302 | |
3303 | list_splice_init(&m->data, &data); | |
3304 | list_for_each_safe(links, next, &data) { | |
3305 | struct ceph_msg_data *data; | |
3306 | ||
3307 | data = list_entry(links, struct ceph_msg_data, links); | |
3308 | list_del_init(links); | |
3309 | ceph_msg_data_destroy(data); | |
3310 | } | |
a1930804 | 3311 | m->data_length = 0; |
58bb3b37 | 3312 | |
c2e552e7 SW |
3313 | if (m->pool) |
3314 | ceph_msgpool_put(m->pool, m); | |
3315 | else | |
3316 | ceph_msg_kfree(m); | |
31b8006e | 3317 | } |
3d14c5d2 | 3318 | EXPORT_SYMBOL(ceph_msg_last_put); |
9ec7cab1 SW |
3319 | |
3320 | void ceph_msg_dump(struct ceph_msg *msg) | |
3321 | { | |
4a73ef27 | 3322 | pr_debug("msg_dump %p (front_max %d length %zd)\n", msg, |
5240d9f9 | 3323 | msg->front_max, msg->data_length); |
9ec7cab1 SW |
3324 | print_hex_dump(KERN_DEBUG, "header: ", |
3325 | DUMP_PREFIX_OFFSET, 16, 1, | |
3326 | &msg->hdr, sizeof(msg->hdr), true); | |
3327 | print_hex_dump(KERN_DEBUG, " front: ", | |
3328 | DUMP_PREFIX_OFFSET, 16, 1, | |
3329 | msg->front.iov_base, msg->front.iov_len, true); | |
3330 | if (msg->middle) | |
3331 | print_hex_dump(KERN_DEBUG, "middle: ", | |
3332 | DUMP_PREFIX_OFFSET, 16, 1, | |
3333 | msg->middle->vec.iov_base, | |
3334 | msg->middle->vec.iov_len, true); | |
3335 | print_hex_dump(KERN_DEBUG, "footer: ", | |
3336 | DUMP_PREFIX_OFFSET, 16, 1, | |
3337 | &msg->footer, sizeof(msg->footer), true); | |
3338 | } | |
3d14c5d2 | 3339 | EXPORT_SYMBOL(ceph_msg_dump); |