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> | |
757856d2 | 9 | #include <linux/nsproxy.h> |
5a0e3ad6 | 10 | #include <linux/slab.h> |
31b8006e SW |
11 | #include <linux/socket.h> |
12 | #include <linux/string.h> | |
3ebc21f7 | 13 | #ifdef CONFIG_BLOCK |
68b4476b | 14 | #include <linux/bio.h> |
3ebc21f7 | 15 | #endif /* CONFIG_BLOCK */ |
ee3b56f2 | 16 | #include <linux/dns_resolver.h> |
31b8006e SW |
17 | #include <net/tcp.h> |
18 | ||
2b3e0c90 | 19 | #include <linux/ceph/ceph_features.h> |
3d14c5d2 YS |
20 | #include <linux/ceph/libceph.h> |
21 | #include <linux/ceph/messenger.h> | |
22 | #include <linux/ceph/decode.h> | |
23 | #include <linux/ceph/pagelist.h> | |
bc3b2d7f | 24 | #include <linux/export.h> |
31b8006e | 25 | |
fe38a2b6 AE |
26 | #define list_entry_next(pos, member) \ |
27 | list_entry(pos->member.next, typeof(*pos), member) | |
28 | ||
31b8006e SW |
29 | /* |
30 | * Ceph uses the messenger to exchange ceph_msg messages with other | |
31 | * hosts in the system. The messenger provides ordered and reliable | |
32 | * delivery. We tolerate TCP disconnects by reconnecting (with | |
33 | * exponential backoff) in the case of a fault (disconnection, bad | |
34 | * crc, protocol error). Acks allow sent messages to be discarded by | |
35 | * the sender. | |
36 | */ | |
37 | ||
bc18f4b1 AE |
38 | /* |
39 | * We track the state of the socket on a given connection using | |
40 | * values defined below. The transition to a new socket state is | |
41 | * handled by a function which verifies we aren't coming from an | |
42 | * unexpected state. | |
43 | * | |
44 | * -------- | |
45 | * | NEW* | transient initial state | |
46 | * -------- | |
47 | * | con_sock_state_init() | |
48 | * v | |
49 | * ---------- | |
50 | * | CLOSED | initialized, but no socket (and no | |
51 | * ---------- TCP connection) | |
52 | * ^ \ | |
53 | * | \ con_sock_state_connecting() | |
54 | * | ---------------------- | |
55 | * | \ | |
56 | * + con_sock_state_closed() \ | |
fbb85a47 SW |
57 | * |+--------------------------- \ |
58 | * | \ \ \ | |
59 | * | ----------- \ \ | |
60 | * | | CLOSING | socket event; \ \ | |
61 | * | ----------- await close \ \ | |
62 | * | ^ \ | | |
63 | * | | \ | | |
64 | * | + con_sock_state_closing() \ | | |
65 | * | / \ | | | |
66 | * | / --------------- | | | |
67 | * | / \ v v | |
bc18f4b1 AE |
68 | * | / -------------- |
69 | * | / -----------------| CONNECTING | socket created, TCP | |
70 | * | | / -------------- connect initiated | |
71 | * | | | con_sock_state_connected() | |
72 | * | | v | |
73 | * ------------- | |
74 | * | CONNECTED | TCP connection established | |
75 | * ------------- | |
76 | * | |
77 | * State values for ceph_connection->sock_state; NEW is assumed to be 0. | |
78 | */ | |
ce2c8903 AE |
79 | |
80 | #define CON_SOCK_STATE_NEW 0 /* -> CLOSED */ | |
81 | #define CON_SOCK_STATE_CLOSED 1 /* -> CONNECTING */ | |
82 | #define CON_SOCK_STATE_CONNECTING 2 /* -> CONNECTED or -> CLOSING */ | |
83 | #define CON_SOCK_STATE_CONNECTED 3 /* -> CLOSING or -> CLOSED */ | |
84 | #define CON_SOCK_STATE_CLOSING 4 /* -> CLOSED */ | |
85 | ||
8dacc7da SW |
86 | /* |
87 | * connection states | |
88 | */ | |
89 | #define CON_STATE_CLOSED 1 /* -> PREOPEN */ | |
90 | #define CON_STATE_PREOPEN 2 /* -> CONNECTING, CLOSED */ | |
91 | #define CON_STATE_CONNECTING 3 /* -> NEGOTIATING, CLOSED */ | |
92 | #define CON_STATE_NEGOTIATING 4 /* -> OPEN, CLOSED */ | |
93 | #define CON_STATE_OPEN 5 /* -> STANDBY, CLOSED */ | |
94 | #define CON_STATE_STANDBY 6 /* -> PREOPEN, CLOSED */ | |
95 | ||
4a861692 SW |
96 | /* |
97 | * ceph_connection flag bits | |
98 | */ | |
99 | #define CON_FLAG_LOSSYTX 0 /* we can close channel or drop | |
100 | * messages on errors */ | |
101 | #define CON_FLAG_KEEPALIVE_PENDING 1 /* we need to send a keepalive */ | |
102 | #define CON_FLAG_WRITE_PENDING 2 /* we have data ready to send */ | |
103 | #define CON_FLAG_SOCK_CLOSED 3 /* socket state changed to closed */ | |
104 | #define CON_FLAG_BACKOFF 4 /* need to retry queuing delayed work */ | |
8dacc7da | 105 | |
c9ffc77a AE |
106 | static bool con_flag_valid(unsigned long con_flag) |
107 | { | |
108 | switch (con_flag) { | |
109 | case CON_FLAG_LOSSYTX: | |
110 | case CON_FLAG_KEEPALIVE_PENDING: | |
111 | case CON_FLAG_WRITE_PENDING: | |
112 | case CON_FLAG_SOCK_CLOSED: | |
113 | case CON_FLAG_BACKOFF: | |
114 | return true; | |
115 | default: | |
116 | return false; | |
117 | } | |
118 | } | |
119 | ||
120 | static void con_flag_clear(struct ceph_connection *con, unsigned long con_flag) | |
121 | { | |
122 | BUG_ON(!con_flag_valid(con_flag)); | |
123 | ||
124 | clear_bit(con_flag, &con->flags); | |
125 | } | |
126 | ||
127 | static void con_flag_set(struct ceph_connection *con, unsigned long con_flag) | |
128 | { | |
129 | BUG_ON(!con_flag_valid(con_flag)); | |
130 | ||
131 | set_bit(con_flag, &con->flags); | |
132 | } | |
133 | ||
134 | static bool con_flag_test(struct ceph_connection *con, unsigned long con_flag) | |
135 | { | |
136 | BUG_ON(!con_flag_valid(con_flag)); | |
137 | ||
138 | return test_bit(con_flag, &con->flags); | |
139 | } | |
140 | ||
141 | static bool con_flag_test_and_clear(struct ceph_connection *con, | |
142 | unsigned long con_flag) | |
143 | { | |
144 | BUG_ON(!con_flag_valid(con_flag)); | |
145 | ||
146 | return test_and_clear_bit(con_flag, &con->flags); | |
147 | } | |
148 | ||
149 | static bool con_flag_test_and_set(struct ceph_connection *con, | |
150 | unsigned long con_flag) | |
151 | { | |
152 | BUG_ON(!con_flag_valid(con_flag)); | |
153 | ||
154 | return test_and_set_bit(con_flag, &con->flags); | |
155 | } | |
156 | ||
e3d5d638 AE |
157 | /* Slab caches for frequently-allocated structures */ |
158 | ||
159 | static struct kmem_cache *ceph_msg_cache; | |
81b36be4 | 160 | static struct kmem_cache *ceph_msg_data_cache; |
e3d5d638 | 161 | |
31b8006e SW |
162 | /* static tag bytes (protocol control messages) */ |
163 | static char tag_msg = CEPH_MSGR_TAG_MSG; | |
164 | static char tag_ack = CEPH_MSGR_TAG_ACK; | |
165 | static char tag_keepalive = CEPH_MSGR_TAG_KEEPALIVE; | |
8b9558aa | 166 | static char tag_keepalive2 = CEPH_MSGR_TAG_KEEPALIVE2; |
31b8006e | 167 | |
a6a5349d SW |
168 | #ifdef CONFIG_LOCKDEP |
169 | static struct lock_class_key socket_class; | |
170 | #endif | |
171 | ||
84495f49 AE |
172 | /* |
173 | * When skipping (ignoring) a block of input we read it into a "skip | |
174 | * buffer," which is this many bytes in size. | |
175 | */ | |
176 | #define SKIP_BUF_SIZE 1024 | |
31b8006e SW |
177 | |
178 | static void queue_con(struct ceph_connection *con); | |
37ab77ac | 179 | static void cancel_con(struct ceph_connection *con); |
68931622 | 180 | static void ceph_con_workfn(struct work_struct *); |
93209264 | 181 | static void con_fault(struct ceph_connection *con); |
31b8006e | 182 | |
31b8006e | 183 | /* |
f64a9317 AE |
184 | * Nicely render a sockaddr as a string. An array of formatted |
185 | * strings is used, to approximate reentrancy. | |
31b8006e | 186 | */ |
f64a9317 AE |
187 | #define ADDR_STR_COUNT_LOG 5 /* log2(# address strings in array) */ |
188 | #define ADDR_STR_COUNT (1 << ADDR_STR_COUNT_LOG) | |
189 | #define ADDR_STR_COUNT_MASK (ADDR_STR_COUNT - 1) | |
190 | #define MAX_ADDR_STR_LEN 64 /* 54 is enough */ | |
191 | ||
192 | static char addr_str[ADDR_STR_COUNT][MAX_ADDR_STR_LEN]; | |
193 | static atomic_t addr_str_seq = ATOMIC_INIT(0); | |
31b8006e | 194 | |
57666519 | 195 | static struct page *zero_page; /* used in certain error cases */ |
57666519 | 196 | |
3d14c5d2 | 197 | const char *ceph_pr_addr(const struct sockaddr_storage *ss) |
31b8006e SW |
198 | { |
199 | int i; | |
200 | char *s; | |
99f0f3b2 AE |
201 | struct sockaddr_in *in4 = (struct sockaddr_in *) ss; |
202 | struct sockaddr_in6 *in6 = (struct sockaddr_in6 *) ss; | |
31b8006e | 203 | |
f64a9317 | 204 | i = atomic_inc_return(&addr_str_seq) & ADDR_STR_COUNT_MASK; |
31b8006e SW |
205 | s = addr_str[i]; |
206 | ||
207 | switch (ss->ss_family) { | |
208 | case AF_INET: | |
bd406145 AE |
209 | snprintf(s, MAX_ADDR_STR_LEN, "%pI4:%hu", &in4->sin_addr, |
210 | ntohs(in4->sin_port)); | |
31b8006e SW |
211 | break; |
212 | ||
213 | case AF_INET6: | |
bd406145 AE |
214 | snprintf(s, MAX_ADDR_STR_LEN, "[%pI6c]:%hu", &in6->sin6_addr, |
215 | ntohs(in6->sin6_port)); | |
31b8006e SW |
216 | break; |
217 | ||
218 | default: | |
d3002b97 AE |
219 | snprintf(s, MAX_ADDR_STR_LEN, "(unknown sockaddr family %hu)", |
220 | ss->ss_family); | |
31b8006e SW |
221 | } |
222 | ||
223 | return s; | |
224 | } | |
3d14c5d2 | 225 | EXPORT_SYMBOL(ceph_pr_addr); |
31b8006e | 226 | |
63f2d211 SW |
227 | static void encode_my_addr(struct ceph_messenger *msgr) |
228 | { | |
229 | memcpy(&msgr->my_enc_addr, &msgr->inst.addr, sizeof(msgr->my_enc_addr)); | |
230 | ceph_encode_addr(&msgr->my_enc_addr); | |
231 | } | |
232 | ||
31b8006e SW |
233 | /* |
234 | * work queue for all reading and writing to/from the socket. | |
235 | */ | |
e0f43c94 | 236 | static struct workqueue_struct *ceph_msgr_wq; |
31b8006e | 237 | |
e3d5d638 AE |
238 | static int ceph_msgr_slab_init(void) |
239 | { | |
240 | BUG_ON(ceph_msg_cache); | |
241 | ceph_msg_cache = kmem_cache_create("ceph_msg", | |
242 | sizeof (struct ceph_msg), | |
243 | __alignof__(struct ceph_msg), 0, NULL); | |
81b36be4 AE |
244 | |
245 | if (!ceph_msg_cache) | |
246 | return -ENOMEM; | |
247 | ||
248 | BUG_ON(ceph_msg_data_cache); | |
249 | ceph_msg_data_cache = kmem_cache_create("ceph_msg_data", | |
250 | sizeof (struct ceph_msg_data), | |
251 | __alignof__(struct ceph_msg_data), | |
252 | 0, NULL); | |
253 | if (ceph_msg_data_cache) | |
254 | return 0; | |
255 | ||
256 | kmem_cache_destroy(ceph_msg_cache); | |
257 | ceph_msg_cache = NULL; | |
258 | ||
259 | return -ENOMEM; | |
e3d5d638 AE |
260 | } |
261 | ||
262 | static void ceph_msgr_slab_exit(void) | |
263 | { | |
81b36be4 AE |
264 | BUG_ON(!ceph_msg_data_cache); |
265 | kmem_cache_destroy(ceph_msg_data_cache); | |
266 | ceph_msg_data_cache = NULL; | |
267 | ||
e3d5d638 AE |
268 | BUG_ON(!ceph_msg_cache); |
269 | kmem_cache_destroy(ceph_msg_cache); | |
270 | ceph_msg_cache = NULL; | |
271 | } | |
272 | ||
15417167 | 273 | static void _ceph_msgr_exit(void) |
6173d1f0 | 274 | { |
d3002b97 | 275 | if (ceph_msgr_wq) { |
6173d1f0 | 276 | destroy_workqueue(ceph_msgr_wq); |
d3002b97 AE |
277 | ceph_msgr_wq = NULL; |
278 | } | |
6173d1f0 | 279 | |
6173d1f0 | 280 | BUG_ON(zero_page == NULL); |
6173d1f0 AE |
281 | page_cache_release(zero_page); |
282 | zero_page = NULL; | |
d920ff6f BC |
283 | |
284 | ceph_msgr_slab_exit(); | |
6173d1f0 AE |
285 | } |
286 | ||
3d14c5d2 | 287 | int ceph_msgr_init(void) |
31b8006e | 288 | { |
d920ff6f BC |
289 | if (ceph_msgr_slab_init()) |
290 | return -ENOMEM; | |
291 | ||
57666519 AE |
292 | BUG_ON(zero_page != NULL); |
293 | zero_page = ZERO_PAGE(0); | |
294 | page_cache_get(zero_page); | |
295 | ||
f9865f06 ID |
296 | /* |
297 | * The number of active work items is limited by the number of | |
298 | * connections, so leave @max_active at default. | |
299 | */ | |
300 | ceph_msgr_wq = alloc_workqueue("ceph-msgr", WQ_MEM_RECLAIM, 0); | |
6173d1f0 AE |
301 | if (ceph_msgr_wq) |
302 | return 0; | |
57666519 | 303 | |
6173d1f0 AE |
304 | pr_err("msgr_init failed to create workqueue\n"); |
305 | _ceph_msgr_exit(); | |
57666519 | 306 | |
6173d1f0 | 307 | return -ENOMEM; |
31b8006e | 308 | } |
3d14c5d2 | 309 | EXPORT_SYMBOL(ceph_msgr_init); |
31b8006e SW |
310 | |
311 | void ceph_msgr_exit(void) | |
312 | { | |
57666519 | 313 | BUG_ON(ceph_msgr_wq == NULL); |
57666519 | 314 | |
6173d1f0 | 315 | _ceph_msgr_exit(); |
31b8006e | 316 | } |
3d14c5d2 | 317 | EXPORT_SYMBOL(ceph_msgr_exit); |
31b8006e | 318 | |
cd84db6e | 319 | void ceph_msgr_flush(void) |
a922d38f SW |
320 | { |
321 | flush_workqueue(ceph_msgr_wq); | |
322 | } | |
3d14c5d2 | 323 | EXPORT_SYMBOL(ceph_msgr_flush); |
a922d38f | 324 | |
ce2c8903 AE |
325 | /* Connection socket state transition functions */ |
326 | ||
327 | static void con_sock_state_init(struct ceph_connection *con) | |
328 | { | |
329 | int old_state; | |
330 | ||
331 | old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CLOSED); | |
332 | if (WARN_ON(old_state != CON_SOCK_STATE_NEW)) | |
333 | printk("%s: unexpected old state %d\n", __func__, old_state); | |
8007b8d6 SW |
334 | dout("%s con %p sock %d -> %d\n", __func__, con, old_state, |
335 | CON_SOCK_STATE_CLOSED); | |
ce2c8903 AE |
336 | } |
337 | ||
338 | static void con_sock_state_connecting(struct ceph_connection *con) | |
339 | { | |
340 | int old_state; | |
341 | ||
342 | old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CONNECTING); | |
343 | if (WARN_ON(old_state != CON_SOCK_STATE_CLOSED)) | |
344 | printk("%s: unexpected old state %d\n", __func__, old_state); | |
8007b8d6 SW |
345 | dout("%s con %p sock %d -> %d\n", __func__, con, old_state, |
346 | CON_SOCK_STATE_CONNECTING); | |
ce2c8903 AE |
347 | } |
348 | ||
349 | static void con_sock_state_connected(struct ceph_connection *con) | |
350 | { | |
351 | int old_state; | |
352 | ||
353 | old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CONNECTED); | |
354 | if (WARN_ON(old_state != CON_SOCK_STATE_CONNECTING)) | |
355 | printk("%s: unexpected old state %d\n", __func__, old_state); | |
8007b8d6 SW |
356 | dout("%s con %p sock %d -> %d\n", __func__, con, old_state, |
357 | CON_SOCK_STATE_CONNECTED); | |
ce2c8903 AE |
358 | } |
359 | ||
360 | static void con_sock_state_closing(struct ceph_connection *con) | |
361 | { | |
362 | int old_state; | |
363 | ||
364 | old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CLOSING); | |
365 | if (WARN_ON(old_state != CON_SOCK_STATE_CONNECTING && | |
366 | old_state != CON_SOCK_STATE_CONNECTED && | |
367 | old_state != CON_SOCK_STATE_CLOSING)) | |
368 | printk("%s: unexpected old state %d\n", __func__, old_state); | |
8007b8d6 SW |
369 | dout("%s con %p sock %d -> %d\n", __func__, con, old_state, |
370 | CON_SOCK_STATE_CLOSING); | |
ce2c8903 AE |
371 | } |
372 | ||
373 | static void con_sock_state_closed(struct ceph_connection *con) | |
374 | { | |
375 | int old_state; | |
376 | ||
377 | old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CLOSED); | |
378 | if (WARN_ON(old_state != CON_SOCK_STATE_CONNECTED && | |
fbb85a47 | 379 | old_state != CON_SOCK_STATE_CLOSING && |
8007b8d6 SW |
380 | old_state != CON_SOCK_STATE_CONNECTING && |
381 | old_state != CON_SOCK_STATE_CLOSED)) | |
ce2c8903 | 382 | printk("%s: unexpected old state %d\n", __func__, old_state); |
8007b8d6 SW |
383 | dout("%s con %p sock %d -> %d\n", __func__, con, old_state, |
384 | CON_SOCK_STATE_CLOSED); | |
ce2c8903 | 385 | } |
a922d38f | 386 | |
31b8006e SW |
387 | /* |
388 | * socket callback functions | |
389 | */ | |
390 | ||
391 | /* data available on socket, or listen socket received a connect */ | |
676d2369 | 392 | static void ceph_sock_data_ready(struct sock *sk) |
31b8006e | 393 | { |
bd406145 | 394 | struct ceph_connection *con = sk->sk_user_data; |
a2a32584 GH |
395 | if (atomic_read(&con->msgr->stopping)) { |
396 | return; | |
397 | } | |
bd406145 | 398 | |
31b8006e | 399 | if (sk->sk_state != TCP_CLOSE_WAIT) { |
327800bd | 400 | dout("%s on %p state = %lu, queueing work\n", __func__, |
31b8006e SW |
401 | con, con->state); |
402 | queue_con(con); | |
403 | } | |
404 | } | |
405 | ||
406 | /* socket has buffer space for writing */ | |
327800bd | 407 | static void ceph_sock_write_space(struct sock *sk) |
31b8006e | 408 | { |
d3002b97 | 409 | struct ceph_connection *con = sk->sk_user_data; |
31b8006e | 410 | |
182fac26 JS |
411 | /* only queue to workqueue if there is data we want to write, |
412 | * and there is sufficient space in the socket buffer to accept | |
327800bd | 413 | * more data. clear SOCK_NOSPACE so that ceph_sock_write_space() |
182fac26 JS |
414 | * doesn't get called again until try_write() fills the socket |
415 | * buffer. See net/ipv4/tcp_input.c:tcp_check_space() | |
416 | * and net/core/stream.c:sk_stream_write_space(). | |
417 | */ | |
c9ffc77a | 418 | if (con_flag_test(con, CON_FLAG_WRITE_PENDING)) { |
64dc6130 | 419 | if (sk_stream_is_writeable(sk)) { |
327800bd | 420 | dout("%s %p queueing write work\n", __func__, con); |
182fac26 JS |
421 | clear_bit(SOCK_NOSPACE, &sk->sk_socket->flags); |
422 | queue_con(con); | |
423 | } | |
31b8006e | 424 | } else { |
327800bd | 425 | dout("%s %p nothing to write\n", __func__, con); |
31b8006e | 426 | } |
31b8006e SW |
427 | } |
428 | ||
429 | /* socket's state has changed */ | |
327800bd | 430 | static void ceph_sock_state_change(struct sock *sk) |
31b8006e | 431 | { |
bd406145 | 432 | struct ceph_connection *con = sk->sk_user_data; |
31b8006e | 433 | |
327800bd | 434 | dout("%s %p state = %lu sk_state = %u\n", __func__, |
31b8006e SW |
435 | con, con->state, sk->sk_state); |
436 | ||
31b8006e SW |
437 | switch (sk->sk_state) { |
438 | case TCP_CLOSE: | |
327800bd | 439 | dout("%s TCP_CLOSE\n", __func__); |
31b8006e | 440 | case TCP_CLOSE_WAIT: |
327800bd | 441 | dout("%s TCP_CLOSE_WAIT\n", __func__); |
ce2c8903 | 442 | con_sock_state_closing(con); |
c9ffc77a | 443 | con_flag_set(con, CON_FLAG_SOCK_CLOSED); |
d65c9e0b | 444 | queue_con(con); |
31b8006e SW |
445 | break; |
446 | case TCP_ESTABLISHED: | |
327800bd | 447 | dout("%s TCP_ESTABLISHED\n", __func__); |
ce2c8903 | 448 | con_sock_state_connected(con); |
31b8006e SW |
449 | queue_con(con); |
450 | break; | |
d3002b97 AE |
451 | default: /* Everything else is uninteresting */ |
452 | break; | |
31b8006e SW |
453 | } |
454 | } | |
455 | ||
456 | /* | |
457 | * set up socket callbacks | |
458 | */ | |
459 | static void set_sock_callbacks(struct socket *sock, | |
460 | struct ceph_connection *con) | |
461 | { | |
462 | struct sock *sk = sock->sk; | |
bd406145 | 463 | sk->sk_user_data = con; |
327800bd AE |
464 | sk->sk_data_ready = ceph_sock_data_ready; |
465 | sk->sk_write_space = ceph_sock_write_space; | |
466 | sk->sk_state_change = ceph_sock_state_change; | |
31b8006e SW |
467 | } |
468 | ||
469 | ||
470 | /* | |
471 | * socket helpers | |
472 | */ | |
473 | ||
474 | /* | |
475 | * initiate connection to a remote socket. | |
476 | */ | |
41617d0c | 477 | static int ceph_tcp_connect(struct ceph_connection *con) |
31b8006e | 478 | { |
f91d3471 | 479 | struct sockaddr_storage *paddr = &con->peer_addr.in_addr; |
31b8006e SW |
480 | struct socket *sock; |
481 | int ret; | |
482 | ||
483 | BUG_ON(con->sock); | |
757856d2 | 484 | ret = sock_create_kern(read_pnet(&con->msgr->net), paddr->ss_family, |
eeb1bd5c | 485 | SOCK_STREAM, IPPROTO_TCP, &sock); |
31b8006e | 486 | if (ret) |
41617d0c | 487 | return ret; |
6d7fdb0a | 488 | sock->sk->sk_allocation = GFP_NOFS; |
31b8006e | 489 | |
a6a5349d SW |
490 | #ifdef CONFIG_LOCKDEP |
491 | lockdep_set_class(&sock->sk->sk_lock, &socket_class); | |
492 | #endif | |
493 | ||
31b8006e SW |
494 | set_sock_callbacks(sock, con); |
495 | ||
3d14c5d2 | 496 | dout("connect %s\n", ceph_pr_addr(&con->peer_addr.in_addr)); |
31b8006e | 497 | |
89a86be0 | 498 | con_sock_state_connecting(con); |
f91d3471 SW |
499 | ret = sock->ops->connect(sock, (struct sockaddr *)paddr, sizeof(*paddr), |
500 | O_NONBLOCK); | |
31b8006e SW |
501 | if (ret == -EINPROGRESS) { |
502 | dout("connect %s EINPROGRESS sk_state = %u\n", | |
3d14c5d2 | 503 | ceph_pr_addr(&con->peer_addr.in_addr), |
31b8006e | 504 | sock->sk->sk_state); |
a5bc3129 | 505 | } else if (ret < 0) { |
31b8006e | 506 | pr_err("connect %s error %d\n", |
3d14c5d2 | 507 | ceph_pr_addr(&con->peer_addr.in_addr), ret); |
31b8006e | 508 | sock_release(sock); |
41617d0c | 509 | return ret; |
a5bc3129 | 510 | } |
89baaa57 | 511 | |
ba988f87 CH |
512 | if (con->msgr->tcp_nodelay) { |
513 | int optval = 1; | |
514 | ||
515 | ret = kernel_setsockopt(sock, SOL_TCP, TCP_NODELAY, | |
516 | (char *)&optval, sizeof(optval)); | |
517 | if (ret) | |
518 | pr_err("kernel_setsockopt(TCP_NODELAY) failed: %d", | |
519 | ret); | |
520 | } | |
521 | ||
a5bc3129 | 522 | con->sock = sock; |
41617d0c | 523 | return 0; |
31b8006e SW |
524 | } |
525 | ||
526 | static int ceph_tcp_recvmsg(struct socket *sock, void *buf, size_t len) | |
527 | { | |
528 | struct kvec iov = {buf, len}; | |
529 | struct msghdr msg = { .msg_flags = MSG_DONTWAIT | MSG_NOSIGNAL }; | |
98bdb0aa | 530 | int r; |
31b8006e | 531 | |
98bdb0aa SW |
532 | r = kernel_recvmsg(sock, &msg, &iov, 1, len, msg.msg_flags); |
533 | if (r == -EAGAIN) | |
534 | r = 0; | |
535 | return r; | |
31b8006e SW |
536 | } |
537 | ||
afb3d90e AE |
538 | static int ceph_tcp_recvpage(struct socket *sock, struct page *page, |
539 | int page_offset, size_t length) | |
540 | { | |
541 | void *kaddr; | |
542 | int ret; | |
543 | ||
544 | BUG_ON(page_offset + length > PAGE_SIZE); | |
545 | ||
546 | kaddr = kmap(page); | |
547 | BUG_ON(!kaddr); | |
548 | ret = ceph_tcp_recvmsg(sock, kaddr + page_offset, length); | |
549 | kunmap(page); | |
550 | ||
551 | return ret; | |
552 | } | |
553 | ||
31b8006e SW |
554 | /* |
555 | * write something. @more is true if caller will be sending more data | |
556 | * shortly. | |
557 | */ | |
558 | static int ceph_tcp_sendmsg(struct socket *sock, struct kvec *iov, | |
559 | size_t kvlen, size_t len, int more) | |
560 | { | |
561 | struct msghdr msg = { .msg_flags = MSG_DONTWAIT | MSG_NOSIGNAL }; | |
42961d23 | 562 | int r; |
31b8006e SW |
563 | |
564 | if (more) | |
565 | msg.msg_flags |= MSG_MORE; | |
566 | else | |
567 | msg.msg_flags |= MSG_EOR; /* superfluous, but what the hell */ | |
568 | ||
42961d23 SW |
569 | r = kernel_sendmsg(sock, &msg, iov, kvlen, len); |
570 | if (r == -EAGAIN) | |
571 | r = 0; | |
572 | return r; | |
31b8006e SW |
573 | } |
574 | ||
178eda29 | 575 | static int __ceph_tcp_sendpage(struct socket *sock, struct page *page, |
e1dcb128 | 576 | int offset, size_t size, bool more) |
31739139 AE |
577 | { |
578 | int flags = MSG_DONTWAIT | MSG_NOSIGNAL | (more ? MSG_MORE : MSG_EOR); | |
579 | int ret; | |
580 | ||
581 | ret = kernel_sendpage(sock, page, offset, size, flags); | |
582 | if (ret == -EAGAIN) | |
583 | ret = 0; | |
584 | ||
585 | return ret; | |
586 | } | |
587 | ||
178eda29 CC |
588 | static int ceph_tcp_sendpage(struct socket *sock, struct page *page, |
589 | int offset, size_t size, bool more) | |
590 | { | |
591 | int ret; | |
592 | struct kvec iov; | |
593 | ||
594 | /* sendpage cannot properly handle pages with page_count == 0, | |
595 | * we need to fallback to sendmsg if that's the case */ | |
596 | if (page_count(page) >= 1) | |
597 | return __ceph_tcp_sendpage(sock, page, offset, size, more); | |
598 | ||
599 | iov.iov_base = kmap(page) + offset; | |
600 | iov.iov_len = size; | |
601 | ret = ceph_tcp_sendmsg(sock, &iov, 1, size, more); | |
602 | kunmap(page); | |
603 | ||
604 | return ret; | |
605 | } | |
31b8006e SW |
606 | |
607 | /* | |
608 | * Shutdown/close the socket for the given connection. | |
609 | */ | |
610 | static int con_close_socket(struct ceph_connection *con) | |
611 | { | |
8007b8d6 | 612 | int rc = 0; |
31b8006e SW |
613 | |
614 | dout("con_close_socket on %p sock %p\n", con, con->sock); | |
8007b8d6 SW |
615 | if (con->sock) { |
616 | rc = con->sock->ops->shutdown(con->sock, SHUT_RDWR); | |
617 | sock_release(con->sock); | |
618 | con->sock = NULL; | |
619 | } | |
456ea468 AE |
620 | |
621 | /* | |
4a861692 | 622 | * Forcibly clear the SOCK_CLOSED flag. It gets set |
456ea468 AE |
623 | * independent of the connection mutex, and we could have |
624 | * received a socket close event before we had the chance to | |
625 | * shut the socket down. | |
626 | */ | |
c9ffc77a | 627 | con_flag_clear(con, CON_FLAG_SOCK_CLOSED); |
8007b8d6 | 628 | |
ce2c8903 | 629 | con_sock_state_closed(con); |
31b8006e SW |
630 | return rc; |
631 | } | |
632 | ||
633 | /* | |
634 | * Reset a connection. Discard all incoming and outgoing messages | |
635 | * and clear *_seq state. | |
636 | */ | |
637 | static void ceph_msg_remove(struct ceph_msg *msg) | |
638 | { | |
639 | list_del_init(&msg->list_head); | |
38941f80 | 640 | BUG_ON(msg->con == NULL); |
36eb71aa | 641 | msg->con->ops->put(msg->con); |
38941f80 AE |
642 | msg->con = NULL; |
643 | ||
31b8006e SW |
644 | ceph_msg_put(msg); |
645 | } | |
646 | static void ceph_msg_remove_list(struct list_head *head) | |
647 | { | |
648 | while (!list_empty(head)) { | |
649 | struct ceph_msg *msg = list_first_entry(head, struct ceph_msg, | |
650 | list_head); | |
651 | ceph_msg_remove(msg); | |
652 | } | |
653 | } | |
654 | ||
655 | static void reset_connection(struct ceph_connection *con) | |
656 | { | |
657 | /* reset connection, out_queue, msg_ and connect_seq */ | |
658 | /* discard existing out_queue and msg_seq */ | |
0fa6ebc6 | 659 | dout("reset_connection %p\n", con); |
31b8006e SW |
660 | ceph_msg_remove_list(&con->out_queue); |
661 | ceph_msg_remove_list(&con->out_sent); | |
662 | ||
cf3e5c40 | 663 | if (con->in_msg) { |
38941f80 AE |
664 | BUG_ON(con->in_msg->con != con); |
665 | con->in_msg->con = NULL; | |
cf3e5c40 SW |
666 | ceph_msg_put(con->in_msg); |
667 | con->in_msg = NULL; | |
36eb71aa | 668 | con->ops->put(con); |
cf3e5c40 SW |
669 | } |
670 | ||
31b8006e SW |
671 | con->connect_seq = 0; |
672 | con->out_seq = 0; | |
c86a2930 SW |
673 | if (con->out_msg) { |
674 | ceph_msg_put(con->out_msg); | |
675 | con->out_msg = NULL; | |
676 | } | |
31b8006e | 677 | con->in_seq = 0; |
0e0d5e0c | 678 | con->in_seq_acked = 0; |
31b8006e SW |
679 | } |
680 | ||
681 | /* | |
682 | * mark a peer down. drop any open connections. | |
683 | */ | |
684 | void ceph_con_close(struct ceph_connection *con) | |
685 | { | |
8c50c817 | 686 | mutex_lock(&con->mutex); |
3d14c5d2 YS |
687 | dout("con_close %p peer %s\n", con, |
688 | ceph_pr_addr(&con->peer_addr.in_addr)); | |
8dacc7da | 689 | con->state = CON_STATE_CLOSED; |
a5988c49 | 690 | |
c9ffc77a AE |
691 | con_flag_clear(con, CON_FLAG_LOSSYTX); /* so we retry next connect */ |
692 | con_flag_clear(con, CON_FLAG_KEEPALIVE_PENDING); | |
693 | con_flag_clear(con, CON_FLAG_WRITE_PENDING); | |
694 | con_flag_clear(con, CON_FLAG_BACKOFF); | |
a5988c49 | 695 | |
31b8006e | 696 | reset_connection(con); |
6f2bc3ff | 697 | con->peer_global_seq = 0; |
37ab77ac | 698 | cancel_con(con); |
ee76e073 | 699 | con_close_socket(con); |
ec302645 | 700 | mutex_unlock(&con->mutex); |
31b8006e | 701 | } |
3d14c5d2 | 702 | EXPORT_SYMBOL(ceph_con_close); |
31b8006e | 703 | |
31b8006e SW |
704 | /* |
705 | * Reopen a closed connection, with a new peer address. | |
706 | */ | |
b7a9e5dd SW |
707 | void ceph_con_open(struct ceph_connection *con, |
708 | __u8 entity_type, __u64 entity_num, | |
709 | struct ceph_entity_addr *addr) | |
31b8006e | 710 | { |
5469155f | 711 | mutex_lock(&con->mutex); |
3d14c5d2 | 712 | dout("con_open %p %s\n", con, ceph_pr_addr(&addr->in_addr)); |
8dacc7da | 713 | |
122070a2 | 714 | WARN_ON(con->state != CON_STATE_CLOSED); |
8dacc7da | 715 | con->state = CON_STATE_PREOPEN; |
a5988c49 | 716 | |
b7a9e5dd SW |
717 | con->peer_name.type = (__u8) entity_type; |
718 | con->peer_name.num = cpu_to_le64(entity_num); | |
719 | ||
31b8006e | 720 | memcpy(&con->peer_addr, addr, sizeof(*addr)); |
03c677e1 | 721 | con->delay = 0; /* reset backoff memory */ |
5469155f | 722 | mutex_unlock(&con->mutex); |
31b8006e SW |
723 | queue_con(con); |
724 | } | |
3d14c5d2 | 725 | EXPORT_SYMBOL(ceph_con_open); |
31b8006e | 726 | |
87b315a5 SW |
727 | /* |
728 | * return true if this connection ever successfully opened | |
729 | */ | |
730 | bool ceph_con_opened(struct ceph_connection *con) | |
731 | { | |
732 | return con->connect_seq > 0; | |
733 | } | |
734 | ||
31b8006e SW |
735 | /* |
736 | * initialize a new connection. | |
737 | */ | |
1bfd89f4 AE |
738 | void ceph_con_init(struct ceph_connection *con, void *private, |
739 | const struct ceph_connection_operations *ops, | |
b7a9e5dd | 740 | struct ceph_messenger *msgr) |
31b8006e SW |
741 | { |
742 | dout("con_init %p\n", con); | |
743 | memset(con, 0, sizeof(*con)); | |
1bfd89f4 AE |
744 | con->private = private; |
745 | con->ops = ops; | |
31b8006e | 746 | con->msgr = msgr; |
ce2c8903 AE |
747 | |
748 | con_sock_state_init(con); | |
749 | ||
ec302645 | 750 | mutex_init(&con->mutex); |
31b8006e SW |
751 | INIT_LIST_HEAD(&con->out_queue); |
752 | INIT_LIST_HEAD(&con->out_sent); | |
68931622 | 753 | INIT_DELAYED_WORK(&con->work, ceph_con_workfn); |
a5988c49 | 754 | |
8dacc7da | 755 | con->state = CON_STATE_CLOSED; |
31b8006e | 756 | } |
3d14c5d2 | 757 | EXPORT_SYMBOL(ceph_con_init); |
31b8006e SW |
758 | |
759 | ||
760 | /* | |
761 | * We maintain a global counter to order connection attempts. Get | |
762 | * a unique seq greater than @gt. | |
763 | */ | |
764 | static u32 get_global_seq(struct ceph_messenger *msgr, u32 gt) | |
765 | { | |
766 | u32 ret; | |
767 | ||
768 | spin_lock(&msgr->global_seq_lock); | |
769 | if (msgr->global_seq < gt) | |
770 | msgr->global_seq = gt; | |
771 | ret = ++msgr->global_seq; | |
772 | spin_unlock(&msgr->global_seq_lock); | |
773 | return ret; | |
774 | } | |
775 | ||
e2200423 | 776 | static void con_out_kvec_reset(struct ceph_connection *con) |
859eb799 AE |
777 | { |
778 | con->out_kvec_left = 0; | |
779 | con->out_kvec_bytes = 0; | |
780 | con->out_kvec_cur = &con->out_kvec[0]; | |
781 | } | |
782 | ||
e2200423 | 783 | static void con_out_kvec_add(struct ceph_connection *con, |
859eb799 AE |
784 | size_t size, void *data) |
785 | { | |
786 | int index; | |
787 | ||
788 | index = con->out_kvec_left; | |
789 | BUG_ON(index >= ARRAY_SIZE(con->out_kvec)); | |
790 | ||
791 | con->out_kvec[index].iov_len = size; | |
792 | con->out_kvec[index].iov_base = data; | |
793 | con->out_kvec_left++; | |
794 | con->out_kvec_bytes += size; | |
795 | } | |
31b8006e | 796 | |
df6ad1f9 | 797 | #ifdef CONFIG_BLOCK |
6aaa4511 AE |
798 | |
799 | /* | |
800 | * For a bio data item, a piece is whatever remains of the next | |
801 | * entry in the current bio iovec, or the first entry in the next | |
802 | * bio in the list. | |
803 | */ | |
8ae4f4f5 | 804 | static void ceph_msg_data_bio_cursor_init(struct ceph_msg_data_cursor *cursor, |
25aff7c5 | 805 | size_t length) |
6aaa4511 | 806 | { |
8ae4f4f5 | 807 | struct ceph_msg_data *data = cursor->data; |
6aaa4511 AE |
808 | struct bio *bio; |
809 | ||
810 | BUG_ON(data->type != CEPH_MSG_DATA_BIO); | |
811 | ||
812 | bio = data->bio; | |
813 | BUG_ON(!bio); | |
6aaa4511 | 814 | |
ca8b3a69 | 815 | cursor->resid = min(length, data->bio_length); |
6aaa4511 | 816 | cursor->bio = bio; |
f38a5181 KO |
817 | cursor->bvec_iter = bio->bi_iter; |
818 | cursor->last_piece = | |
819 | cursor->resid <= bio_iter_len(bio, cursor->bvec_iter); | |
6aaa4511 AE |
820 | } |
821 | ||
8ae4f4f5 | 822 | static struct page *ceph_msg_data_bio_next(struct ceph_msg_data_cursor *cursor, |
6aaa4511 AE |
823 | size_t *page_offset, |
824 | size_t *length) | |
825 | { | |
8ae4f4f5 | 826 | struct ceph_msg_data *data = cursor->data; |
6aaa4511 | 827 | struct bio *bio; |
f38a5181 | 828 | struct bio_vec bio_vec; |
6aaa4511 AE |
829 | |
830 | BUG_ON(data->type != CEPH_MSG_DATA_BIO); | |
831 | ||
832 | bio = cursor->bio; | |
833 | BUG_ON(!bio); | |
834 | ||
f38a5181 | 835 | bio_vec = bio_iter_iovec(bio, cursor->bvec_iter); |
6aaa4511 | 836 | |
f38a5181 | 837 | *page_offset = (size_t) bio_vec.bv_offset; |
6aaa4511 | 838 | BUG_ON(*page_offset >= PAGE_SIZE); |
25aff7c5 AE |
839 | if (cursor->last_piece) /* pagelist offset is always 0 */ |
840 | *length = cursor->resid; | |
841 | else | |
f38a5181 | 842 | *length = (size_t) bio_vec.bv_len; |
25aff7c5 | 843 | BUG_ON(*length > cursor->resid); |
5df521b1 | 844 | BUG_ON(*page_offset + *length > PAGE_SIZE); |
6aaa4511 | 845 | |
f38a5181 | 846 | return bio_vec.bv_page; |
6aaa4511 AE |
847 | } |
848 | ||
8ae4f4f5 AE |
849 | static bool ceph_msg_data_bio_advance(struct ceph_msg_data_cursor *cursor, |
850 | size_t bytes) | |
6aaa4511 | 851 | { |
6aaa4511 | 852 | struct bio *bio; |
f38a5181 | 853 | struct bio_vec bio_vec; |
6aaa4511 | 854 | |
8ae4f4f5 | 855 | BUG_ON(cursor->data->type != CEPH_MSG_DATA_BIO); |
6aaa4511 AE |
856 | |
857 | bio = cursor->bio; | |
858 | BUG_ON(!bio); | |
859 | ||
f38a5181 | 860 | bio_vec = bio_iter_iovec(bio, cursor->bvec_iter); |
6aaa4511 AE |
861 | |
862 | /* Advance the cursor offset */ | |
863 | ||
25aff7c5 AE |
864 | BUG_ON(cursor->resid < bytes); |
865 | cursor->resid -= bytes; | |
f38a5181 KO |
866 | |
867 | bio_advance_iter(bio, &cursor->bvec_iter, bytes); | |
868 | ||
869 | if (bytes < bio_vec.bv_len) | |
6aaa4511 AE |
870 | return false; /* more bytes to process in this segment */ |
871 | ||
872 | /* Move on to the next segment, and possibly the next bio */ | |
873 | ||
f38a5181 | 874 | if (!cursor->bvec_iter.bi_size) { |
6aaa4511 | 875 | bio = bio->bi_next; |
0ec1d15e ID |
876 | cursor->bio = bio; |
877 | if (bio) | |
878 | cursor->bvec_iter = bio->bi_iter; | |
879 | else | |
880 | memset(&cursor->bvec_iter, 0, | |
881 | sizeof(cursor->bvec_iter)); | |
6aaa4511 | 882 | } |
6aaa4511 | 883 | |
25aff7c5 AE |
884 | if (!cursor->last_piece) { |
885 | BUG_ON(!cursor->resid); | |
886 | BUG_ON(!bio); | |
887 | /* A short read is OK, so use <= rather than == */ | |
f38a5181 | 888 | if (cursor->resid <= bio_iter_len(bio, cursor->bvec_iter)) |
6aaa4511 | 889 | cursor->last_piece = true; |
25aff7c5 | 890 | } |
6aaa4511 AE |
891 | |
892 | return true; | |
893 | } | |
ea96571f | 894 | #endif /* CONFIG_BLOCK */ |
df6ad1f9 | 895 | |
e766d7b5 AE |
896 | /* |
897 | * For a page array, a piece comes from the first page in the array | |
898 | * that has not already been fully consumed. | |
899 | */ | |
8ae4f4f5 | 900 | static void ceph_msg_data_pages_cursor_init(struct ceph_msg_data_cursor *cursor, |
25aff7c5 | 901 | size_t length) |
e766d7b5 | 902 | { |
8ae4f4f5 | 903 | struct ceph_msg_data *data = cursor->data; |
e766d7b5 AE |
904 | int page_count; |
905 | ||
906 | BUG_ON(data->type != CEPH_MSG_DATA_PAGES); | |
907 | ||
908 | BUG_ON(!data->pages); | |
909 | BUG_ON(!data->length); | |
910 | ||
ca8b3a69 | 911 | cursor->resid = min(length, data->length); |
e766d7b5 | 912 | page_count = calc_pages_for(data->alignment, (u64)data->length); |
e766d7b5 AE |
913 | cursor->page_offset = data->alignment & ~PAGE_MASK; |
914 | cursor->page_index = 0; | |
56fc5659 AE |
915 | BUG_ON(page_count > (int)USHRT_MAX); |
916 | cursor->page_count = (unsigned short)page_count; | |
917 | BUG_ON(length > SIZE_MAX - cursor->page_offset); | |
5f740d7e | 918 | cursor->last_piece = cursor->page_offset + cursor->resid <= PAGE_SIZE; |
e766d7b5 AE |
919 | } |
920 | ||
8ae4f4f5 AE |
921 | static struct page * |
922 | ceph_msg_data_pages_next(struct ceph_msg_data_cursor *cursor, | |
923 | size_t *page_offset, size_t *length) | |
e766d7b5 | 924 | { |
8ae4f4f5 | 925 | struct ceph_msg_data *data = cursor->data; |
e766d7b5 AE |
926 | |
927 | BUG_ON(data->type != CEPH_MSG_DATA_PAGES); | |
928 | ||
929 | BUG_ON(cursor->page_index >= cursor->page_count); | |
930 | BUG_ON(cursor->page_offset >= PAGE_SIZE); | |
e766d7b5 AE |
931 | |
932 | *page_offset = cursor->page_offset; | |
25aff7c5 | 933 | if (cursor->last_piece) |
e766d7b5 | 934 | *length = cursor->resid; |
25aff7c5 | 935 | else |
e766d7b5 | 936 | *length = PAGE_SIZE - *page_offset; |
e766d7b5 AE |
937 | |
938 | return data->pages[cursor->page_index]; | |
939 | } | |
940 | ||
8ae4f4f5 | 941 | static bool ceph_msg_data_pages_advance(struct ceph_msg_data_cursor *cursor, |
e766d7b5 AE |
942 | size_t bytes) |
943 | { | |
8ae4f4f5 | 944 | BUG_ON(cursor->data->type != CEPH_MSG_DATA_PAGES); |
e766d7b5 AE |
945 | |
946 | BUG_ON(cursor->page_offset + bytes > PAGE_SIZE); | |
e766d7b5 AE |
947 | |
948 | /* Advance the cursor page offset */ | |
949 | ||
950 | cursor->resid -= bytes; | |
5df521b1 AE |
951 | cursor->page_offset = (cursor->page_offset + bytes) & ~PAGE_MASK; |
952 | if (!bytes || cursor->page_offset) | |
e766d7b5 AE |
953 | return false; /* more bytes to process in the current page */ |
954 | ||
d90deda6 YZ |
955 | if (!cursor->resid) |
956 | return false; /* no more data */ | |
957 | ||
5df521b1 | 958 | /* Move on to the next page; offset is already at 0 */ |
e766d7b5 AE |
959 | |
960 | BUG_ON(cursor->page_index >= cursor->page_count); | |
e766d7b5 | 961 | cursor->page_index++; |
25aff7c5 | 962 | cursor->last_piece = cursor->resid <= PAGE_SIZE; |
e766d7b5 AE |
963 | |
964 | return true; | |
965 | } | |
966 | ||
fe38a2b6 | 967 | /* |
dd236fcb AE |
968 | * For a pagelist, a piece is whatever remains to be consumed in the |
969 | * first page in the list, or the front of the next page. | |
fe38a2b6 | 970 | */ |
8ae4f4f5 AE |
971 | static void |
972 | ceph_msg_data_pagelist_cursor_init(struct ceph_msg_data_cursor *cursor, | |
25aff7c5 | 973 | size_t length) |
fe38a2b6 | 974 | { |
8ae4f4f5 | 975 | struct ceph_msg_data *data = cursor->data; |
fe38a2b6 AE |
976 | struct ceph_pagelist *pagelist; |
977 | struct page *page; | |
978 | ||
dd236fcb | 979 | BUG_ON(data->type != CEPH_MSG_DATA_PAGELIST); |
fe38a2b6 AE |
980 | |
981 | pagelist = data->pagelist; | |
982 | BUG_ON(!pagelist); | |
25aff7c5 AE |
983 | |
984 | if (!length) | |
fe38a2b6 AE |
985 | return; /* pagelist can be assigned but empty */ |
986 | ||
987 | BUG_ON(list_empty(&pagelist->head)); | |
988 | page = list_first_entry(&pagelist->head, struct page, lru); | |
989 | ||
ca8b3a69 | 990 | cursor->resid = min(length, pagelist->length); |
fe38a2b6 AE |
991 | cursor->page = page; |
992 | cursor->offset = 0; | |
a51b272e | 993 | cursor->last_piece = cursor->resid <= PAGE_SIZE; |
fe38a2b6 AE |
994 | } |
995 | ||
8ae4f4f5 AE |
996 | static struct page * |
997 | ceph_msg_data_pagelist_next(struct ceph_msg_data_cursor *cursor, | |
998 | size_t *page_offset, size_t *length) | |
fe38a2b6 | 999 | { |
8ae4f4f5 | 1000 | struct ceph_msg_data *data = cursor->data; |
fe38a2b6 | 1001 | struct ceph_pagelist *pagelist; |
fe38a2b6 AE |
1002 | |
1003 | BUG_ON(data->type != CEPH_MSG_DATA_PAGELIST); | |
1004 | ||
1005 | pagelist = data->pagelist; | |
1006 | BUG_ON(!pagelist); | |
1007 | ||
1008 | BUG_ON(!cursor->page); | |
25aff7c5 | 1009 | BUG_ON(cursor->offset + cursor->resid != pagelist->length); |
fe38a2b6 | 1010 | |
5df521b1 | 1011 | /* offset of first page in pagelist is always 0 */ |
fe38a2b6 | 1012 | *page_offset = cursor->offset & ~PAGE_MASK; |
5df521b1 | 1013 | if (cursor->last_piece) |
25aff7c5 AE |
1014 | *length = cursor->resid; |
1015 | else | |
1016 | *length = PAGE_SIZE - *page_offset; | |
fe38a2b6 | 1017 | |
8ae4f4f5 | 1018 | return cursor->page; |
fe38a2b6 AE |
1019 | } |
1020 | ||
8ae4f4f5 | 1021 | static bool ceph_msg_data_pagelist_advance(struct ceph_msg_data_cursor *cursor, |
dd236fcb | 1022 | size_t bytes) |
fe38a2b6 | 1023 | { |
8ae4f4f5 | 1024 | struct ceph_msg_data *data = cursor->data; |
fe38a2b6 AE |
1025 | struct ceph_pagelist *pagelist; |
1026 | ||
1027 | BUG_ON(data->type != CEPH_MSG_DATA_PAGELIST); | |
1028 | ||
1029 | pagelist = data->pagelist; | |
1030 | BUG_ON(!pagelist); | |
25aff7c5 AE |
1031 | |
1032 | BUG_ON(cursor->offset + cursor->resid != pagelist->length); | |
fe38a2b6 AE |
1033 | BUG_ON((cursor->offset & ~PAGE_MASK) + bytes > PAGE_SIZE); |
1034 | ||
1035 | /* Advance the cursor offset */ | |
1036 | ||
25aff7c5 | 1037 | cursor->resid -= bytes; |
fe38a2b6 | 1038 | cursor->offset += bytes; |
5df521b1 | 1039 | /* offset of first page in pagelist is always 0 */ |
fe38a2b6 AE |
1040 | if (!bytes || cursor->offset & ~PAGE_MASK) |
1041 | return false; /* more bytes to process in the current page */ | |
1042 | ||
d90deda6 YZ |
1043 | if (!cursor->resid) |
1044 | return false; /* no more data */ | |
1045 | ||
fe38a2b6 AE |
1046 | /* Move on to the next page */ |
1047 | ||
1048 | BUG_ON(list_is_last(&cursor->page->lru, &pagelist->head)); | |
1049 | cursor->page = list_entry_next(cursor->page, lru); | |
25aff7c5 | 1050 | cursor->last_piece = cursor->resid <= PAGE_SIZE; |
fe38a2b6 AE |
1051 | |
1052 | return true; | |
1053 | } | |
1054 | ||
dd236fcb AE |
1055 | /* |
1056 | * Message data is handled (sent or received) in pieces, where each | |
1057 | * piece resides on a single page. The network layer might not | |
1058 | * consume an entire piece at once. A data item's cursor keeps | |
1059 | * track of which piece is next to process and how much remains to | |
1060 | * be processed in that piece. It also tracks whether the current | |
1061 | * piece is the last one in the data item. | |
1062 | */ | |
ca8b3a69 | 1063 | static void __ceph_msg_data_cursor_init(struct ceph_msg_data_cursor *cursor) |
dd236fcb | 1064 | { |
ca8b3a69 | 1065 | size_t length = cursor->total_resid; |
8ae4f4f5 | 1066 | |
8ae4f4f5 | 1067 | switch (cursor->data->type) { |
dd236fcb | 1068 | case CEPH_MSG_DATA_PAGELIST: |
8ae4f4f5 | 1069 | ceph_msg_data_pagelist_cursor_init(cursor, length); |
dd236fcb | 1070 | break; |
e766d7b5 | 1071 | case CEPH_MSG_DATA_PAGES: |
8ae4f4f5 | 1072 | ceph_msg_data_pages_cursor_init(cursor, length); |
e766d7b5 | 1073 | break; |
dd236fcb AE |
1074 | #ifdef CONFIG_BLOCK |
1075 | case CEPH_MSG_DATA_BIO: | |
8ae4f4f5 | 1076 | ceph_msg_data_bio_cursor_init(cursor, length); |
6aaa4511 | 1077 | break; |
dd236fcb | 1078 | #endif /* CONFIG_BLOCK */ |
6aaa4511 | 1079 | case CEPH_MSG_DATA_NONE: |
dd236fcb AE |
1080 | default: |
1081 | /* BUG(); */ | |
1082 | break; | |
1083 | } | |
8ae4f4f5 | 1084 | cursor->need_crc = true; |
dd236fcb AE |
1085 | } |
1086 | ||
ca8b3a69 AE |
1087 | static void ceph_msg_data_cursor_init(struct ceph_msg *msg, size_t length) |
1088 | { | |
1089 | struct ceph_msg_data_cursor *cursor = &msg->cursor; | |
1090 | struct ceph_msg_data *data; | |
1091 | ||
1092 | BUG_ON(!length); | |
1093 | BUG_ON(length > msg->data_length); | |
1094 | BUG_ON(list_empty(&msg->data)); | |
1095 | ||
ca8b3a69 AE |
1096 | cursor->data_head = &msg->data; |
1097 | cursor->total_resid = length; | |
1098 | data = list_first_entry(&msg->data, struct ceph_msg_data, links); | |
1099 | cursor->data = data; | |
1100 | ||
1101 | __ceph_msg_data_cursor_init(cursor); | |
1102 | } | |
1103 | ||
dd236fcb AE |
1104 | /* |
1105 | * Return the page containing the next piece to process for a given | |
1106 | * data item, and supply the page offset and length of that piece. | |
1107 | * Indicate whether this is the last piece in this data item. | |
1108 | */ | |
8ae4f4f5 AE |
1109 | static struct page *ceph_msg_data_next(struct ceph_msg_data_cursor *cursor, |
1110 | size_t *page_offset, size_t *length, | |
dd236fcb AE |
1111 | bool *last_piece) |
1112 | { | |
1113 | struct page *page; | |
1114 | ||
8ae4f4f5 | 1115 | switch (cursor->data->type) { |
dd236fcb | 1116 | case CEPH_MSG_DATA_PAGELIST: |
8ae4f4f5 | 1117 | page = ceph_msg_data_pagelist_next(cursor, page_offset, length); |
dd236fcb | 1118 | break; |
e766d7b5 | 1119 | case CEPH_MSG_DATA_PAGES: |
8ae4f4f5 | 1120 | page = ceph_msg_data_pages_next(cursor, page_offset, length); |
e766d7b5 | 1121 | break; |
dd236fcb AE |
1122 | #ifdef CONFIG_BLOCK |
1123 | case CEPH_MSG_DATA_BIO: | |
8ae4f4f5 | 1124 | page = ceph_msg_data_bio_next(cursor, page_offset, length); |
6aaa4511 | 1125 | break; |
dd236fcb | 1126 | #endif /* CONFIG_BLOCK */ |
6aaa4511 | 1127 | case CEPH_MSG_DATA_NONE: |
dd236fcb AE |
1128 | default: |
1129 | page = NULL; | |
1130 | break; | |
1131 | } | |
1132 | BUG_ON(!page); | |
1133 | BUG_ON(*page_offset + *length > PAGE_SIZE); | |
1134 | BUG_ON(!*length); | |
1135 | if (last_piece) | |
8ae4f4f5 | 1136 | *last_piece = cursor->last_piece; |
dd236fcb AE |
1137 | |
1138 | return page; | |
1139 | } | |
1140 | ||
1141 | /* | |
1142 | * Returns true if the result moves the cursor on to the next piece | |
1143 | * of the data item. | |
1144 | */ | |
8ae4f4f5 AE |
1145 | static bool ceph_msg_data_advance(struct ceph_msg_data_cursor *cursor, |
1146 | size_t bytes) | |
dd236fcb AE |
1147 | { |
1148 | bool new_piece; | |
1149 | ||
25aff7c5 | 1150 | BUG_ON(bytes > cursor->resid); |
8ae4f4f5 | 1151 | switch (cursor->data->type) { |
dd236fcb | 1152 | case CEPH_MSG_DATA_PAGELIST: |
8ae4f4f5 | 1153 | new_piece = ceph_msg_data_pagelist_advance(cursor, bytes); |
dd236fcb | 1154 | break; |
e766d7b5 | 1155 | case CEPH_MSG_DATA_PAGES: |
8ae4f4f5 | 1156 | new_piece = ceph_msg_data_pages_advance(cursor, bytes); |
e766d7b5 | 1157 | break; |
dd236fcb AE |
1158 | #ifdef CONFIG_BLOCK |
1159 | case CEPH_MSG_DATA_BIO: | |
8ae4f4f5 | 1160 | new_piece = ceph_msg_data_bio_advance(cursor, bytes); |
6aaa4511 | 1161 | break; |
dd236fcb | 1162 | #endif /* CONFIG_BLOCK */ |
6aaa4511 | 1163 | case CEPH_MSG_DATA_NONE: |
dd236fcb AE |
1164 | default: |
1165 | BUG(); | |
1166 | break; | |
1167 | } | |
ca8b3a69 | 1168 | cursor->total_resid -= bytes; |
dd236fcb | 1169 | |
ca8b3a69 AE |
1170 | if (!cursor->resid && cursor->total_resid) { |
1171 | WARN_ON(!cursor->last_piece); | |
1172 | BUG_ON(list_is_last(&cursor->data->links, cursor->data_head)); | |
1173 | cursor->data = list_entry_next(cursor->data, links); | |
1174 | __ceph_msg_data_cursor_init(cursor); | |
a51b272e | 1175 | new_piece = true; |
ca8b3a69 | 1176 | } |
a51b272e | 1177 | cursor->need_crc = new_piece; |
ca8b3a69 | 1178 | |
dd236fcb AE |
1179 | return new_piece; |
1180 | } | |
1181 | ||
98fa5dd8 | 1182 | static void prepare_message_data(struct ceph_msg *msg, u32 data_len) |
739c905b | 1183 | { |
739c905b | 1184 | BUG_ON(!msg); |
25aff7c5 | 1185 | BUG_ON(!data_len); |
739c905b | 1186 | |
4c59b4a2 | 1187 | /* Initialize data cursor */ |
fe38a2b6 | 1188 | |
8ae4f4f5 | 1189 | ceph_msg_data_cursor_init(msg, (size_t)data_len); |
739c905b AE |
1190 | } |
1191 | ||
31b8006e SW |
1192 | /* |
1193 | * Prepare footer for currently outgoing message, and finish things | |
1194 | * off. Assumes out_kvec* are already valid.. we just add on to the end. | |
1195 | */ | |
859eb799 | 1196 | static void prepare_write_message_footer(struct ceph_connection *con) |
31b8006e SW |
1197 | { |
1198 | struct ceph_msg *m = con->out_msg; | |
859eb799 | 1199 | int v = con->out_kvec_left; |
31b8006e | 1200 | |
fd154f3c AE |
1201 | m->footer.flags |= CEPH_MSG_FOOTER_COMPLETE; |
1202 | ||
31b8006e SW |
1203 | dout("prepare_write_message_footer %p\n", con); |
1204 | con->out_kvec_is_msg = true; | |
1205 | con->out_kvec[v].iov_base = &m->footer; | |
33d07337 YZ |
1206 | if (con->peer_features & CEPH_FEATURE_MSG_AUTH) { |
1207 | if (con->ops->sign_message) | |
1208 | con->ops->sign_message(con, m); | |
1209 | else | |
1210 | m->footer.sig = 0; | |
1211 | con->out_kvec[v].iov_len = sizeof(m->footer); | |
1212 | con->out_kvec_bytes += sizeof(m->footer); | |
1213 | } else { | |
1214 | m->old_footer.flags = m->footer.flags; | |
1215 | con->out_kvec[v].iov_len = sizeof(m->old_footer); | |
1216 | con->out_kvec_bytes += sizeof(m->old_footer); | |
1217 | } | |
31b8006e SW |
1218 | con->out_kvec_left++; |
1219 | con->out_more = m->more_to_follow; | |
c86a2930 | 1220 | con->out_msg_done = true; |
31b8006e SW |
1221 | } |
1222 | ||
1223 | /* | |
1224 | * Prepare headers for the next outgoing message. | |
1225 | */ | |
1226 | static void prepare_write_message(struct ceph_connection *con) | |
1227 | { | |
1228 | struct ceph_msg *m; | |
a9a0c51a | 1229 | u32 crc; |
31b8006e | 1230 | |
e2200423 | 1231 | con_out_kvec_reset(con); |
31b8006e | 1232 | con->out_kvec_is_msg = true; |
c86a2930 | 1233 | con->out_msg_done = false; |
31b8006e SW |
1234 | |
1235 | /* Sneak an ack in there first? If we can get it into the same | |
1236 | * TCP packet that's a good thing. */ | |
1237 | if (con->in_seq > con->in_seq_acked) { | |
1238 | con->in_seq_acked = con->in_seq; | |
e2200423 | 1239 | con_out_kvec_add(con, sizeof (tag_ack), &tag_ack); |
31b8006e | 1240 | con->out_temp_ack = cpu_to_le64(con->in_seq_acked); |
e2200423 | 1241 | con_out_kvec_add(con, sizeof (con->out_temp_ack), |
859eb799 | 1242 | &con->out_temp_ack); |
31b8006e SW |
1243 | } |
1244 | ||
38941f80 | 1245 | BUG_ON(list_empty(&con->out_queue)); |
859eb799 | 1246 | m = list_first_entry(&con->out_queue, struct ceph_msg, list_head); |
c86a2930 | 1247 | con->out_msg = m; |
38941f80 | 1248 | BUG_ON(m->con != con); |
4cf9d544 SW |
1249 | |
1250 | /* put message on sent list */ | |
1251 | ceph_msg_get(m); | |
1252 | list_move_tail(&m->list_head, &con->out_sent); | |
31b8006e | 1253 | |
e84346b7 SW |
1254 | /* |
1255 | * only assign outgoing seq # if we haven't sent this message | |
1256 | * yet. if it is requeued, resend with it's original seq. | |
1257 | */ | |
1258 | if (m->needs_out_seq) { | |
1259 | m->hdr.seq = cpu_to_le64(++con->out_seq); | |
1260 | m->needs_out_seq = false; | |
1261 | } | |
98fa5dd8 | 1262 | WARN_ON(m->data_length != le32_to_cpu(m->hdr.data_len)); |
31b8006e | 1263 | |
98fa5dd8 | 1264 | dout("prepare_write_message %p seq %lld type %d len %d+%d+%zd\n", |
31b8006e SW |
1265 | m, con->out_seq, le16_to_cpu(m->hdr.type), |
1266 | le32_to_cpu(m->hdr.front_len), le32_to_cpu(m->hdr.middle_len), | |
98fa5dd8 | 1267 | m->data_length); |
31b8006e SW |
1268 | BUG_ON(le32_to_cpu(m->hdr.front_len) != m->front.iov_len); |
1269 | ||
1270 | /* tag + hdr + front + middle */ | |
e2200423 AE |
1271 | con_out_kvec_add(con, sizeof (tag_msg), &tag_msg); |
1272 | con_out_kvec_add(con, sizeof (m->hdr), &m->hdr); | |
1273 | con_out_kvec_add(con, m->front.iov_len, m->front.iov_base); | |
859eb799 | 1274 | |
31b8006e | 1275 | if (m->middle) |
e2200423 | 1276 | con_out_kvec_add(con, m->middle->vec.iov_len, |
859eb799 | 1277 | m->middle->vec.iov_base); |
31b8006e SW |
1278 | |
1279 | /* fill in crc (except data pages), footer */ | |
a9a0c51a AE |
1280 | crc = crc32c(0, &m->hdr, offsetof(struct ceph_msg_header, crc)); |
1281 | con->out_msg->hdr.crc = cpu_to_le32(crc); | |
fd154f3c | 1282 | con->out_msg->footer.flags = 0; |
a9a0c51a AE |
1283 | |
1284 | crc = crc32c(0, m->front.iov_base, m->front.iov_len); | |
1285 | con->out_msg->footer.front_crc = cpu_to_le32(crc); | |
1286 | if (m->middle) { | |
1287 | crc = crc32c(0, m->middle->vec.iov_base, | |
1288 | m->middle->vec.iov_len); | |
1289 | con->out_msg->footer.middle_crc = cpu_to_le32(crc); | |
1290 | } else | |
31b8006e | 1291 | con->out_msg->footer.middle_crc = 0; |
739c905b | 1292 | dout("%s front_crc %u middle_crc %u\n", __func__, |
31b8006e SW |
1293 | le32_to_cpu(con->out_msg->footer.front_crc), |
1294 | le32_to_cpu(con->out_msg->footer.middle_crc)); | |
1295 | ||
1296 | /* is there a data payload? */ | |
739c905b | 1297 | con->out_msg->footer.data_crc = 0; |
98fa5dd8 AE |
1298 | if (m->data_length) { |
1299 | prepare_message_data(con->out_msg, m->data_length); | |
78625051 AE |
1300 | con->out_more = 1; /* data + footer will follow */ |
1301 | } else { | |
31b8006e | 1302 | /* no, queue up footer too and be done */ |
859eb799 | 1303 | prepare_write_message_footer(con); |
78625051 | 1304 | } |
31b8006e | 1305 | |
c9ffc77a | 1306 | con_flag_set(con, CON_FLAG_WRITE_PENDING); |
31b8006e SW |
1307 | } |
1308 | ||
1309 | /* | |
1310 | * Prepare an ack. | |
1311 | */ | |
1312 | static void prepare_write_ack(struct ceph_connection *con) | |
1313 | { | |
1314 | dout("prepare_write_ack %p %llu -> %llu\n", con, | |
1315 | con->in_seq_acked, con->in_seq); | |
1316 | con->in_seq_acked = con->in_seq; | |
1317 | ||
e2200423 | 1318 | con_out_kvec_reset(con); |
859eb799 | 1319 | |
e2200423 | 1320 | con_out_kvec_add(con, sizeof (tag_ack), &tag_ack); |
859eb799 | 1321 | |
31b8006e | 1322 | con->out_temp_ack = cpu_to_le64(con->in_seq_acked); |
e2200423 | 1323 | con_out_kvec_add(con, sizeof (con->out_temp_ack), |
859eb799 AE |
1324 | &con->out_temp_ack); |
1325 | ||
31b8006e | 1326 | con->out_more = 1; /* more will follow.. eventually.. */ |
c9ffc77a | 1327 | con_flag_set(con, CON_FLAG_WRITE_PENDING); |
31b8006e SW |
1328 | } |
1329 | ||
3a23083b SW |
1330 | /* |
1331 | * Prepare to share the seq during handshake | |
1332 | */ | |
1333 | static void prepare_write_seq(struct ceph_connection *con) | |
1334 | { | |
1335 | dout("prepare_write_seq %p %llu -> %llu\n", con, | |
1336 | con->in_seq_acked, con->in_seq); | |
1337 | con->in_seq_acked = con->in_seq; | |
1338 | ||
1339 | con_out_kvec_reset(con); | |
1340 | ||
1341 | con->out_temp_ack = cpu_to_le64(con->in_seq_acked); | |
1342 | con_out_kvec_add(con, sizeof (con->out_temp_ack), | |
1343 | &con->out_temp_ack); | |
1344 | ||
1345 | con_flag_set(con, CON_FLAG_WRITE_PENDING); | |
1346 | } | |
1347 | ||
31b8006e SW |
1348 | /* |
1349 | * Prepare to write keepalive byte. | |
1350 | */ | |
1351 | static void prepare_write_keepalive(struct ceph_connection *con) | |
1352 | { | |
1353 | dout("prepare_write_keepalive %p\n", con); | |
e2200423 | 1354 | con_out_kvec_reset(con); |
8b9558aa | 1355 | if (con->peer_features & CEPH_FEATURE_MSGR_KEEPALIVE2) { |
7f61f545 ID |
1356 | struct timespec now = CURRENT_TIME; |
1357 | ||
8b9558aa | 1358 | con_out_kvec_add(con, sizeof(tag_keepalive2), &tag_keepalive2); |
7f61f545 ID |
1359 | ceph_encode_timespec(&con->out_temp_keepalive2, &now); |
1360 | con_out_kvec_add(con, sizeof(con->out_temp_keepalive2), | |
1361 | &con->out_temp_keepalive2); | |
8b9558aa YZ |
1362 | } else { |
1363 | con_out_kvec_add(con, sizeof(tag_keepalive), &tag_keepalive); | |
1364 | } | |
c9ffc77a | 1365 | con_flag_set(con, CON_FLAG_WRITE_PENDING); |
31b8006e SW |
1366 | } |
1367 | ||
1368 | /* | |
1369 | * Connection negotiation. | |
1370 | */ | |
1371 | ||
dac1e716 AE |
1372 | static struct ceph_auth_handshake *get_connect_authorizer(struct ceph_connection *con, |
1373 | int *auth_proto) | |
4e7a5dcd | 1374 | { |
a3530df3 | 1375 | struct ceph_auth_handshake *auth; |
b1c6b980 AE |
1376 | |
1377 | if (!con->ops->get_authorizer) { | |
1378 | con->out_connect.authorizer_protocol = CEPH_AUTH_UNKNOWN; | |
1379 | con->out_connect.authorizer_len = 0; | |
729796be | 1380 | return NULL; |
b1c6b980 AE |
1381 | } |
1382 | ||
1383 | /* Can't hold the mutex while getting authorizer */ | |
ec302645 | 1384 | mutex_unlock(&con->mutex); |
dac1e716 | 1385 | auth = con->ops->get_authorizer(con, auth_proto, con->auth_retry); |
ec302645 | 1386 | mutex_lock(&con->mutex); |
4e7a5dcd | 1387 | |
a3530df3 | 1388 | if (IS_ERR(auth)) |
729796be | 1389 | return auth; |
8dacc7da | 1390 | if (con->state != CON_STATE_NEGOTIATING) |
729796be | 1391 | return ERR_PTR(-EAGAIN); |
0da5d703 | 1392 | |
8f43fb53 AE |
1393 | con->auth_reply_buf = auth->authorizer_reply_buf; |
1394 | con->auth_reply_buf_len = auth->authorizer_reply_buf_len; | |
729796be | 1395 | return auth; |
4e7a5dcd SW |
1396 | } |
1397 | ||
31b8006e SW |
1398 | /* |
1399 | * We connected to a peer and are saying hello. | |
1400 | */ | |
e825a66d | 1401 | static void prepare_write_banner(struct ceph_connection *con) |
31b8006e | 1402 | { |
e2200423 AE |
1403 | con_out_kvec_add(con, strlen(CEPH_BANNER), CEPH_BANNER); |
1404 | con_out_kvec_add(con, sizeof (con->msgr->my_enc_addr), | |
e825a66d | 1405 | &con->msgr->my_enc_addr); |
eed0ef2c | 1406 | |
eed0ef2c | 1407 | con->out_more = 0; |
c9ffc77a | 1408 | con_flag_set(con, CON_FLAG_WRITE_PENDING); |
eed0ef2c SW |
1409 | } |
1410 | ||
e825a66d | 1411 | static int prepare_write_connect(struct ceph_connection *con) |
eed0ef2c | 1412 | { |
95c96174 | 1413 | unsigned int global_seq = get_global_seq(con->msgr, 0); |
31b8006e | 1414 | int proto; |
dac1e716 | 1415 | int auth_proto; |
729796be | 1416 | struct ceph_auth_handshake *auth; |
31b8006e SW |
1417 | |
1418 | switch (con->peer_name.type) { | |
1419 | case CEPH_ENTITY_TYPE_MON: | |
1420 | proto = CEPH_MONC_PROTOCOL; | |
1421 | break; | |
1422 | case CEPH_ENTITY_TYPE_OSD: | |
1423 | proto = CEPH_OSDC_PROTOCOL; | |
1424 | break; | |
1425 | case CEPH_ENTITY_TYPE_MDS: | |
1426 | proto = CEPH_MDSC_PROTOCOL; | |
1427 | break; | |
1428 | default: | |
1429 | BUG(); | |
1430 | } | |
1431 | ||
1432 | dout("prepare_write_connect %p cseq=%d gseq=%d proto=%d\n", con, | |
1433 | con->connect_seq, global_seq, proto); | |
4e7a5dcd | 1434 | |
e825a66d | 1435 | con->out_connect.features = cpu_to_le64(con->msgr->supported_features); |
31b8006e SW |
1436 | con->out_connect.host_type = cpu_to_le32(CEPH_ENTITY_TYPE_CLIENT); |
1437 | con->out_connect.connect_seq = cpu_to_le32(con->connect_seq); | |
1438 | con->out_connect.global_seq = cpu_to_le32(global_seq); | |
1439 | con->out_connect.protocol_version = cpu_to_le32(proto); | |
1440 | con->out_connect.flags = 0; | |
31b8006e | 1441 | |
dac1e716 AE |
1442 | auth_proto = CEPH_AUTH_UNKNOWN; |
1443 | auth = get_connect_authorizer(con, &auth_proto); | |
729796be AE |
1444 | if (IS_ERR(auth)) |
1445 | return PTR_ERR(auth); | |
3da54776 | 1446 | |
dac1e716 | 1447 | con->out_connect.authorizer_protocol = cpu_to_le32(auth_proto); |
3da54776 AE |
1448 | con->out_connect.authorizer_len = auth ? |
1449 | cpu_to_le32(auth->authorizer_buf_len) : 0; | |
1450 | ||
e2200423 | 1451 | con_out_kvec_add(con, sizeof (con->out_connect), |
3da54776 AE |
1452 | &con->out_connect); |
1453 | if (auth && auth->authorizer_buf_len) | |
e2200423 | 1454 | con_out_kvec_add(con, auth->authorizer_buf_len, |
3da54776 | 1455 | auth->authorizer_buf); |
859eb799 | 1456 | |
31b8006e | 1457 | con->out_more = 0; |
c9ffc77a | 1458 | con_flag_set(con, CON_FLAG_WRITE_PENDING); |
4e7a5dcd | 1459 | |
e10c758e | 1460 | return 0; |
31b8006e SW |
1461 | } |
1462 | ||
31b8006e SW |
1463 | /* |
1464 | * write as much of pending kvecs to the socket as we can. | |
1465 | * 1 -> done | |
1466 | * 0 -> socket full, but more to do | |
1467 | * <0 -> error | |
1468 | */ | |
1469 | static int write_partial_kvec(struct ceph_connection *con) | |
1470 | { | |
1471 | int ret; | |
1472 | ||
1473 | dout("write_partial_kvec %p %d left\n", con, con->out_kvec_bytes); | |
1474 | while (con->out_kvec_bytes > 0) { | |
1475 | ret = ceph_tcp_sendmsg(con->sock, con->out_kvec_cur, | |
1476 | con->out_kvec_left, con->out_kvec_bytes, | |
1477 | con->out_more); | |
1478 | if (ret <= 0) | |
1479 | goto out; | |
1480 | con->out_kvec_bytes -= ret; | |
1481 | if (con->out_kvec_bytes == 0) | |
1482 | break; /* done */ | |
f42299e6 AE |
1483 | |
1484 | /* account for full iov entries consumed */ | |
1485 | while (ret >= con->out_kvec_cur->iov_len) { | |
1486 | BUG_ON(!con->out_kvec_left); | |
1487 | ret -= con->out_kvec_cur->iov_len; | |
1488 | con->out_kvec_cur++; | |
1489 | con->out_kvec_left--; | |
1490 | } | |
1491 | /* and for a partially-consumed entry */ | |
1492 | if (ret) { | |
1493 | con->out_kvec_cur->iov_len -= ret; | |
1494 | con->out_kvec_cur->iov_base += ret; | |
31b8006e SW |
1495 | } |
1496 | } | |
1497 | con->out_kvec_left = 0; | |
1498 | con->out_kvec_is_msg = false; | |
1499 | ret = 1; | |
1500 | out: | |
1501 | dout("write_partial_kvec %p %d left in %d kvecs ret = %d\n", con, | |
1502 | con->out_kvec_bytes, con->out_kvec_left, ret); | |
1503 | return ret; /* done! */ | |
1504 | } | |
1505 | ||
35b62808 AE |
1506 | static u32 ceph_crc32c_page(u32 crc, struct page *page, |
1507 | unsigned int page_offset, | |
1508 | unsigned int length) | |
1509 | { | |
1510 | char *kaddr; | |
1511 | ||
1512 | kaddr = kmap(page); | |
1513 | BUG_ON(kaddr == NULL); | |
1514 | crc = crc32c(crc, kaddr + page_offset, length); | |
1515 | kunmap(page); | |
1516 | ||
1517 | return crc; | |
1518 | } | |
31b8006e SW |
1519 | /* |
1520 | * Write as much message data payload as we can. If we finish, queue | |
1521 | * up the footer. | |
1522 | * 1 -> done, footer is now queued in out_kvec[]. | |
1523 | * 0 -> socket full, but more to do | |
1524 | * <0 -> error | |
1525 | */ | |
34d2d200 | 1526 | static int write_partial_message_data(struct ceph_connection *con) |
31b8006e SW |
1527 | { |
1528 | struct ceph_msg *msg = con->out_msg; | |
8ae4f4f5 | 1529 | struct ceph_msg_data_cursor *cursor = &msg->cursor; |
37675b0f | 1530 | bool do_datacrc = !con->msgr->nocrc; |
f5db90bc | 1531 | u32 crc; |
31b8006e | 1532 | |
859a35d5 | 1533 | dout("%s %p msg %p\n", __func__, con, msg); |
31b8006e | 1534 | |
5240d9f9 | 1535 | if (list_empty(&msg->data)) |
4c59b4a2 AE |
1536 | return -EINVAL; |
1537 | ||
5821bd8c AE |
1538 | /* |
1539 | * Iterate through each page that contains data to be | |
1540 | * written, and send as much as possible for each. | |
1541 | * | |
1542 | * If we are calculating the data crc (the default), we will | |
1543 | * need to map the page. If we have no pages, they have | |
1544 | * been revoked, so use the zero page. | |
1545 | */ | |
f5db90bc | 1546 | crc = do_datacrc ? le32_to_cpu(msg->footer.data_crc) : 0; |
643c68a4 | 1547 | while (cursor->resid) { |
8a166d05 | 1548 | struct page *page; |
e387d525 AE |
1549 | size_t page_offset; |
1550 | size_t length; | |
8a166d05 | 1551 | bool last_piece; |
8ea299bc | 1552 | bool need_crc; |
f5db90bc | 1553 | int ret; |
68b4476b | 1554 | |
8ae4f4f5 | 1555 | page = ceph_msg_data_next(&msg->cursor, &page_offset, &length, |
4c59b4a2 | 1556 | &last_piece); |
e387d525 | 1557 | ret = ceph_tcp_sendpage(con->sock, page, page_offset, |
c2cfa194 | 1558 | length, !last_piece); |
f5db90bc AE |
1559 | if (ret <= 0) { |
1560 | if (do_datacrc) | |
1561 | msg->footer.data_crc = cpu_to_le32(crc); | |
31b8006e | 1562 | |
f5db90bc AE |
1563 | return ret; |
1564 | } | |
143334ff AE |
1565 | if (do_datacrc && cursor->need_crc) |
1566 | crc = ceph_crc32c_page(crc, page, page_offset, length); | |
8ae4f4f5 | 1567 | need_crc = ceph_msg_data_advance(&msg->cursor, (size_t)ret); |
31b8006e SW |
1568 | } |
1569 | ||
34d2d200 | 1570 | dout("%s %p msg %p done\n", __func__, con, msg); |
31b8006e SW |
1571 | |
1572 | /* prepare and queue up footer, too */ | |
f5db90bc AE |
1573 | if (do_datacrc) |
1574 | msg->footer.data_crc = cpu_to_le32(crc); | |
1575 | else | |
84ca8fc8 | 1576 | msg->footer.flags |= CEPH_MSG_FOOTER_NOCRC; |
e2200423 | 1577 | con_out_kvec_reset(con); |
859eb799 | 1578 | prepare_write_message_footer(con); |
f5db90bc AE |
1579 | |
1580 | return 1; /* must return > 0 to indicate success */ | |
31b8006e SW |
1581 | } |
1582 | ||
1583 | /* | |
1584 | * write some zeros | |
1585 | */ | |
1586 | static int write_partial_skip(struct ceph_connection *con) | |
1587 | { | |
1588 | int ret; | |
1589 | ||
1590 | while (con->out_skip > 0) { | |
31739139 | 1591 | size_t size = min(con->out_skip, (int) PAGE_CACHE_SIZE); |
31b8006e | 1592 | |
e1dcb128 | 1593 | ret = ceph_tcp_sendpage(con->sock, zero_page, 0, size, true); |
31b8006e SW |
1594 | if (ret <= 0) |
1595 | goto out; | |
1596 | con->out_skip -= ret; | |
1597 | } | |
1598 | ret = 1; | |
1599 | out: | |
1600 | return ret; | |
1601 | } | |
1602 | ||
1603 | /* | |
1604 | * Prepare to read connection handshake, or an ack. | |
1605 | */ | |
eed0ef2c SW |
1606 | static void prepare_read_banner(struct ceph_connection *con) |
1607 | { | |
1608 | dout("prepare_read_banner %p\n", con); | |
1609 | con->in_base_pos = 0; | |
1610 | } | |
1611 | ||
31b8006e SW |
1612 | static void prepare_read_connect(struct ceph_connection *con) |
1613 | { | |
1614 | dout("prepare_read_connect %p\n", con); | |
1615 | con->in_base_pos = 0; | |
1616 | } | |
1617 | ||
1618 | static void prepare_read_ack(struct ceph_connection *con) | |
1619 | { | |
1620 | dout("prepare_read_ack %p\n", con); | |
1621 | con->in_base_pos = 0; | |
1622 | } | |
1623 | ||
3a23083b SW |
1624 | static void prepare_read_seq(struct ceph_connection *con) |
1625 | { | |
1626 | dout("prepare_read_seq %p\n", con); | |
1627 | con->in_base_pos = 0; | |
1628 | con->in_tag = CEPH_MSGR_TAG_SEQ; | |
1629 | } | |
1630 | ||
31b8006e SW |
1631 | static void prepare_read_tag(struct ceph_connection *con) |
1632 | { | |
1633 | dout("prepare_read_tag %p\n", con); | |
1634 | con->in_base_pos = 0; | |
1635 | con->in_tag = CEPH_MSGR_TAG_READY; | |
1636 | } | |
1637 | ||
8b9558aa YZ |
1638 | static void prepare_read_keepalive_ack(struct ceph_connection *con) |
1639 | { | |
1640 | dout("prepare_read_keepalive_ack %p\n", con); | |
1641 | con->in_base_pos = 0; | |
1642 | } | |
1643 | ||
31b8006e SW |
1644 | /* |
1645 | * Prepare to read a message. | |
1646 | */ | |
1647 | static int prepare_read_message(struct ceph_connection *con) | |
1648 | { | |
1649 | dout("prepare_read_message %p\n", con); | |
1650 | BUG_ON(con->in_msg != NULL); | |
1651 | con->in_base_pos = 0; | |
1652 | con->in_front_crc = con->in_middle_crc = con->in_data_crc = 0; | |
1653 | return 0; | |
1654 | } | |
1655 | ||
1656 | ||
1657 | static int read_partial(struct ceph_connection *con, | |
fd51653f | 1658 | int end, int size, void *object) |
31b8006e | 1659 | { |
e6cee71f AE |
1660 | while (con->in_base_pos < end) { |
1661 | int left = end - con->in_base_pos; | |
31b8006e SW |
1662 | int have = size - left; |
1663 | int ret = ceph_tcp_recvmsg(con->sock, object + have, left); | |
1664 | if (ret <= 0) | |
1665 | return ret; | |
1666 | con->in_base_pos += ret; | |
1667 | } | |
1668 | return 1; | |
1669 | } | |
1670 | ||
1671 | ||
1672 | /* | |
1673 | * Read all or part of the connect-side handshake on a new connection | |
1674 | */ | |
eed0ef2c | 1675 | static int read_partial_banner(struct ceph_connection *con) |
31b8006e | 1676 | { |
fd51653f AE |
1677 | int size; |
1678 | int end; | |
1679 | int ret; | |
31b8006e | 1680 | |
eed0ef2c | 1681 | dout("read_partial_banner %p at %d\n", con, con->in_base_pos); |
31b8006e SW |
1682 | |
1683 | /* peer's banner */ | |
fd51653f AE |
1684 | size = strlen(CEPH_BANNER); |
1685 | end = size; | |
1686 | ret = read_partial(con, end, size, con->in_banner); | |
31b8006e SW |
1687 | if (ret <= 0) |
1688 | goto out; | |
fd51653f AE |
1689 | |
1690 | size = sizeof (con->actual_peer_addr); | |
1691 | end += size; | |
1692 | ret = read_partial(con, end, size, &con->actual_peer_addr); | |
31b8006e SW |
1693 | if (ret <= 0) |
1694 | goto out; | |
fd51653f AE |
1695 | |
1696 | size = sizeof (con->peer_addr_for_me); | |
1697 | end += size; | |
1698 | ret = read_partial(con, end, size, &con->peer_addr_for_me); | |
31b8006e SW |
1699 | if (ret <= 0) |
1700 | goto out; | |
fd51653f | 1701 | |
eed0ef2c SW |
1702 | out: |
1703 | return ret; | |
1704 | } | |
1705 | ||
1706 | static int read_partial_connect(struct ceph_connection *con) | |
1707 | { | |
fd51653f AE |
1708 | int size; |
1709 | int end; | |
1710 | int ret; | |
eed0ef2c SW |
1711 | |
1712 | dout("read_partial_connect %p at %d\n", con, con->in_base_pos); | |
1713 | ||
fd51653f AE |
1714 | size = sizeof (con->in_reply); |
1715 | end = size; | |
1716 | ret = read_partial(con, end, size, &con->in_reply); | |
31b8006e SW |
1717 | if (ret <= 0) |
1718 | goto out; | |
fd51653f AE |
1719 | |
1720 | size = le32_to_cpu(con->in_reply.authorizer_len); | |
1721 | end += size; | |
1722 | ret = read_partial(con, end, size, con->auth_reply_buf); | |
4e7a5dcd SW |
1723 | if (ret <= 0) |
1724 | goto out; | |
31b8006e | 1725 | |
4e7a5dcd SW |
1726 | dout("read_partial_connect %p tag %d, con_seq = %u, g_seq = %u\n", |
1727 | con, (int)con->in_reply.tag, | |
1728 | le32_to_cpu(con->in_reply.connect_seq), | |
31b8006e SW |
1729 | le32_to_cpu(con->in_reply.global_seq)); |
1730 | out: | |
1731 | return ret; | |
eed0ef2c | 1732 | |
31b8006e SW |
1733 | } |
1734 | ||
1735 | /* | |
1736 | * Verify the hello banner looks okay. | |
1737 | */ | |
1738 | static int verify_hello(struct ceph_connection *con) | |
1739 | { | |
1740 | if (memcmp(con->in_banner, CEPH_BANNER, strlen(CEPH_BANNER))) { | |
13e38c8a | 1741 | pr_err("connect to %s got bad banner\n", |
3d14c5d2 | 1742 | ceph_pr_addr(&con->peer_addr.in_addr)); |
31b8006e SW |
1743 | con->error_msg = "protocol error, bad banner"; |
1744 | return -1; | |
1745 | } | |
1746 | return 0; | |
1747 | } | |
1748 | ||
1749 | static bool addr_is_blank(struct sockaddr_storage *ss) | |
1750 | { | |
c44bd69c ID |
1751 | struct in_addr *addr = &((struct sockaddr_in *)ss)->sin_addr; |
1752 | struct in6_addr *addr6 = &((struct sockaddr_in6 *)ss)->sin6_addr; | |
1753 | ||
31b8006e SW |
1754 | switch (ss->ss_family) { |
1755 | case AF_INET: | |
c44bd69c | 1756 | return addr->s_addr == htonl(INADDR_ANY); |
31b8006e | 1757 | case AF_INET6: |
c44bd69c ID |
1758 | return ipv6_addr_any(addr6); |
1759 | default: | |
1760 | return true; | |
31b8006e | 1761 | } |
31b8006e SW |
1762 | } |
1763 | ||
1764 | static int addr_port(struct sockaddr_storage *ss) | |
1765 | { | |
1766 | switch (ss->ss_family) { | |
1767 | case AF_INET: | |
f28bcfbe | 1768 | return ntohs(((struct sockaddr_in *)ss)->sin_port); |
31b8006e | 1769 | case AF_INET6: |
f28bcfbe | 1770 | return ntohs(((struct sockaddr_in6 *)ss)->sin6_port); |
31b8006e SW |
1771 | } |
1772 | return 0; | |
1773 | } | |
1774 | ||
1775 | static void addr_set_port(struct sockaddr_storage *ss, int p) | |
1776 | { | |
1777 | switch (ss->ss_family) { | |
1778 | case AF_INET: | |
1779 | ((struct sockaddr_in *)ss)->sin_port = htons(p); | |
a2a79609 | 1780 | break; |
31b8006e SW |
1781 | case AF_INET6: |
1782 | ((struct sockaddr_in6 *)ss)->sin6_port = htons(p); | |
a2a79609 | 1783 | break; |
31b8006e SW |
1784 | } |
1785 | } | |
1786 | ||
ee3b56f2 NW |
1787 | /* |
1788 | * Unlike other *_pton function semantics, zero indicates success. | |
1789 | */ | |
1790 | static int ceph_pton(const char *str, size_t len, struct sockaddr_storage *ss, | |
1791 | char delim, const char **ipend) | |
1792 | { | |
99f0f3b2 AE |
1793 | struct sockaddr_in *in4 = (struct sockaddr_in *) ss; |
1794 | struct sockaddr_in6 *in6 = (struct sockaddr_in6 *) ss; | |
ee3b56f2 NW |
1795 | |
1796 | memset(ss, 0, sizeof(*ss)); | |
1797 | ||
1798 | if (in4_pton(str, len, (u8 *)&in4->sin_addr.s_addr, delim, ipend)) { | |
1799 | ss->ss_family = AF_INET; | |
1800 | return 0; | |
1801 | } | |
1802 | ||
1803 | if (in6_pton(str, len, (u8 *)&in6->sin6_addr.s6_addr, delim, ipend)) { | |
1804 | ss->ss_family = AF_INET6; | |
1805 | return 0; | |
1806 | } | |
1807 | ||
1808 | return -EINVAL; | |
1809 | } | |
1810 | ||
1811 | /* | |
1812 | * Extract hostname string and resolve using kernel DNS facility. | |
1813 | */ | |
1814 | #ifdef CONFIG_CEPH_LIB_USE_DNS_RESOLVER | |
1815 | static int ceph_dns_resolve_name(const char *name, size_t namelen, | |
1816 | struct sockaddr_storage *ss, char delim, const char **ipend) | |
1817 | { | |
1818 | const char *end, *delim_p; | |
1819 | char *colon_p, *ip_addr = NULL; | |
1820 | int ip_len, ret; | |
1821 | ||
1822 | /* | |
1823 | * The end of the hostname occurs immediately preceding the delimiter or | |
1824 | * the port marker (':') where the delimiter takes precedence. | |
1825 | */ | |
1826 | delim_p = memchr(name, delim, namelen); | |
1827 | colon_p = memchr(name, ':', namelen); | |
1828 | ||
1829 | if (delim_p && colon_p) | |
1830 | end = delim_p < colon_p ? delim_p : colon_p; | |
1831 | else if (!delim_p && colon_p) | |
1832 | end = colon_p; | |
1833 | else { | |
1834 | end = delim_p; | |
1835 | if (!end) /* case: hostname:/ */ | |
1836 | end = name + namelen; | |
1837 | } | |
1838 | ||
1839 | if (end <= name) | |
1840 | return -EINVAL; | |
1841 | ||
1842 | /* do dns_resolve upcall */ | |
1843 | ip_len = dns_query(NULL, name, end - name, NULL, &ip_addr, NULL); | |
1844 | if (ip_len > 0) | |
1845 | ret = ceph_pton(ip_addr, ip_len, ss, -1, NULL); | |
1846 | else | |
1847 | ret = -ESRCH; | |
1848 | ||
1849 | kfree(ip_addr); | |
1850 | ||
1851 | *ipend = end; | |
1852 | ||
1853 | pr_info("resolve '%.*s' (ret=%d): %s\n", (int)(end - name), name, | |
1854 | ret, ret ? "failed" : ceph_pr_addr(ss)); | |
1855 | ||
1856 | return ret; | |
1857 | } | |
1858 | #else | |
1859 | static inline int ceph_dns_resolve_name(const char *name, size_t namelen, | |
1860 | struct sockaddr_storage *ss, char delim, const char **ipend) | |
1861 | { | |
1862 | return -EINVAL; | |
1863 | } | |
1864 | #endif | |
1865 | ||
1866 | /* | |
1867 | * Parse a server name (IP or hostname). If a valid IP address is not found | |
1868 | * then try to extract a hostname to resolve using userspace DNS upcall. | |
1869 | */ | |
1870 | static int ceph_parse_server_name(const char *name, size_t namelen, | |
1871 | struct sockaddr_storage *ss, char delim, const char **ipend) | |
1872 | { | |
1873 | int ret; | |
1874 | ||
1875 | ret = ceph_pton(name, namelen, ss, delim, ipend); | |
1876 | if (ret) | |
1877 | ret = ceph_dns_resolve_name(name, namelen, ss, delim, ipend); | |
1878 | ||
1879 | return ret; | |
1880 | } | |
1881 | ||
31b8006e SW |
1882 | /* |
1883 | * Parse an ip[:port] list into an addr array. Use the default | |
1884 | * monitor port if a port isn't specified. | |
1885 | */ | |
1886 | int ceph_parse_ips(const char *c, const char *end, | |
1887 | struct ceph_entity_addr *addr, | |
1888 | int max_count, int *count) | |
1889 | { | |
ee3b56f2 | 1890 | int i, ret = -EINVAL; |
31b8006e SW |
1891 | const char *p = c; |
1892 | ||
1893 | dout("parse_ips on '%.*s'\n", (int)(end-c), c); | |
1894 | for (i = 0; i < max_count; i++) { | |
1895 | const char *ipend; | |
1896 | struct sockaddr_storage *ss = &addr[i].in_addr; | |
31b8006e | 1897 | int port; |
39139f64 SW |
1898 | char delim = ','; |
1899 | ||
1900 | if (*p == '[') { | |
1901 | delim = ']'; | |
1902 | p++; | |
1903 | } | |
31b8006e | 1904 | |
ee3b56f2 NW |
1905 | ret = ceph_parse_server_name(p, end - p, ss, delim, &ipend); |
1906 | if (ret) | |
31b8006e | 1907 | goto bad; |
ee3b56f2 NW |
1908 | ret = -EINVAL; |
1909 | ||
31b8006e SW |
1910 | p = ipend; |
1911 | ||
39139f64 SW |
1912 | if (delim == ']') { |
1913 | if (*p != ']') { | |
1914 | dout("missing matching ']'\n"); | |
1915 | goto bad; | |
1916 | } | |
1917 | p++; | |
1918 | } | |
1919 | ||
31b8006e SW |
1920 | /* port? */ |
1921 | if (p < end && *p == ':') { | |
1922 | port = 0; | |
1923 | p++; | |
1924 | while (p < end && *p >= '0' && *p <= '9') { | |
1925 | port = (port * 10) + (*p - '0'); | |
1926 | p++; | |
1927 | } | |
f48db1e9 ID |
1928 | if (port == 0) |
1929 | port = CEPH_MON_PORT; | |
1930 | else if (port > 65535) | |
31b8006e SW |
1931 | goto bad; |
1932 | } else { | |
1933 | port = CEPH_MON_PORT; | |
1934 | } | |
1935 | ||
1936 | addr_set_port(ss, port); | |
1937 | ||
3d14c5d2 | 1938 | dout("parse_ips got %s\n", ceph_pr_addr(ss)); |
31b8006e SW |
1939 | |
1940 | if (p == end) | |
1941 | break; | |
1942 | if (*p != ',') | |
1943 | goto bad; | |
1944 | p++; | |
1945 | } | |
1946 | ||
1947 | if (p != end) | |
1948 | goto bad; | |
1949 | ||
1950 | if (count) | |
1951 | *count = i + 1; | |
1952 | return 0; | |
1953 | ||
1954 | bad: | |
39139f64 | 1955 | pr_err("parse_ips bad ip '%.*s'\n", (int)(end - c), c); |
ee3b56f2 | 1956 | return ret; |
31b8006e | 1957 | } |
3d14c5d2 | 1958 | EXPORT_SYMBOL(ceph_parse_ips); |
31b8006e | 1959 | |
eed0ef2c | 1960 | static int process_banner(struct ceph_connection *con) |
31b8006e | 1961 | { |
eed0ef2c | 1962 | dout("process_banner on %p\n", con); |
31b8006e SW |
1963 | |
1964 | if (verify_hello(con) < 0) | |
1965 | return -1; | |
1966 | ||
63f2d211 SW |
1967 | ceph_decode_addr(&con->actual_peer_addr); |
1968 | ceph_decode_addr(&con->peer_addr_for_me); | |
1969 | ||
31b8006e SW |
1970 | /* |
1971 | * Make sure the other end is who we wanted. note that the other | |
1972 | * end may not yet know their ip address, so if it's 0.0.0.0, give | |
1973 | * them the benefit of the doubt. | |
1974 | */ | |
103e2d3a SW |
1975 | if (memcmp(&con->peer_addr, &con->actual_peer_addr, |
1976 | sizeof(con->peer_addr)) != 0 && | |
31b8006e SW |
1977 | !(addr_is_blank(&con->actual_peer_addr.in_addr) && |
1978 | con->actual_peer_addr.nonce == con->peer_addr.nonce)) { | |
b9a67899 JP |
1979 | pr_warn("wrong peer, want %s/%d, got %s/%d\n", |
1980 | ceph_pr_addr(&con->peer_addr.in_addr), | |
1981 | (int)le32_to_cpu(con->peer_addr.nonce), | |
1982 | ceph_pr_addr(&con->actual_peer_addr.in_addr), | |
1983 | (int)le32_to_cpu(con->actual_peer_addr.nonce)); | |
58bb3b37 | 1984 | con->error_msg = "wrong peer at address"; |
31b8006e SW |
1985 | return -1; |
1986 | } | |
1987 | ||
1988 | /* | |
1989 | * did we learn our address? | |
1990 | */ | |
1991 | if (addr_is_blank(&con->msgr->inst.addr.in_addr)) { | |
1992 | int port = addr_port(&con->msgr->inst.addr.in_addr); | |
1993 | ||
1994 | memcpy(&con->msgr->inst.addr.in_addr, | |
1995 | &con->peer_addr_for_me.in_addr, | |
1996 | sizeof(con->peer_addr_for_me.in_addr)); | |
1997 | addr_set_port(&con->msgr->inst.addr.in_addr, port); | |
63f2d211 | 1998 | encode_my_addr(con->msgr); |
eed0ef2c | 1999 | dout("process_banner learned my addr is %s\n", |
3d14c5d2 | 2000 | ceph_pr_addr(&con->msgr->inst.addr.in_addr)); |
31b8006e SW |
2001 | } |
2002 | ||
eed0ef2c SW |
2003 | return 0; |
2004 | } | |
2005 | ||
2006 | static int process_connect(struct ceph_connection *con) | |
2007 | { | |
3d14c5d2 YS |
2008 | u64 sup_feat = con->msgr->supported_features; |
2009 | u64 req_feat = con->msgr->required_features; | |
2b3e0c90 ID |
2010 | u64 server_feat = ceph_sanitize_features( |
2011 | le64_to_cpu(con->in_reply.features)); | |
0da5d703 | 2012 | int ret; |
04a419f9 | 2013 | |
eed0ef2c SW |
2014 | dout("process_connect on %p tag %d\n", con, (int)con->in_tag); |
2015 | ||
31b8006e | 2016 | switch (con->in_reply.tag) { |
04a419f9 SW |
2017 | case CEPH_MSGR_TAG_FEATURES: |
2018 | pr_err("%s%lld %s feature set mismatch," | |
2019 | " my %llx < server's %llx, missing %llx\n", | |
2020 | ENTITY_NAME(con->peer_name), | |
3d14c5d2 | 2021 | ceph_pr_addr(&con->peer_addr.in_addr), |
04a419f9 SW |
2022 | sup_feat, server_feat, server_feat & ~sup_feat); |
2023 | con->error_msg = "missing required protocol features"; | |
0fa6ebc6 | 2024 | reset_connection(con); |
04a419f9 SW |
2025 | return -1; |
2026 | ||
31b8006e | 2027 | case CEPH_MSGR_TAG_BADPROTOVER: |
31b8006e SW |
2028 | pr_err("%s%lld %s protocol version mismatch," |
2029 | " my %d != server's %d\n", | |
2030 | ENTITY_NAME(con->peer_name), | |
3d14c5d2 | 2031 | ceph_pr_addr(&con->peer_addr.in_addr), |
31b8006e SW |
2032 | le32_to_cpu(con->out_connect.protocol_version), |
2033 | le32_to_cpu(con->in_reply.protocol_version)); | |
2034 | con->error_msg = "protocol version mismatch"; | |
0fa6ebc6 | 2035 | reset_connection(con); |
31b8006e SW |
2036 | return -1; |
2037 | ||
4e7a5dcd SW |
2038 | case CEPH_MSGR_TAG_BADAUTHORIZER: |
2039 | con->auth_retry++; | |
2040 | dout("process_connect %p got BADAUTHORIZER attempt %d\n", con, | |
2041 | con->auth_retry); | |
2042 | if (con->auth_retry == 2) { | |
2043 | con->error_msg = "connect authorization failure"; | |
4e7a5dcd SW |
2044 | return -1; |
2045 | } | |
6d4221b5 | 2046 | con_out_kvec_reset(con); |
e825a66d | 2047 | ret = prepare_write_connect(con); |
0da5d703 SW |
2048 | if (ret < 0) |
2049 | return ret; | |
63733a0f | 2050 | prepare_read_connect(con); |
4e7a5dcd | 2051 | break; |
31b8006e SW |
2052 | |
2053 | case CEPH_MSGR_TAG_RESETSESSION: | |
2054 | /* | |
2055 | * If we connected with a large connect_seq but the peer | |
2056 | * has no record of a session with us (no connection, or | |
2057 | * connect_seq == 0), they will send RESETSESION to indicate | |
2058 | * that they must have reset their session, and may have | |
2059 | * dropped messages. | |
2060 | */ | |
2061 | dout("process_connect got RESET peer seq %u\n", | |
5bdca4e0 | 2062 | le32_to_cpu(con->in_reply.connect_seq)); |
31b8006e SW |
2063 | pr_err("%s%lld %s connection reset\n", |
2064 | ENTITY_NAME(con->peer_name), | |
3d14c5d2 | 2065 | ceph_pr_addr(&con->peer_addr.in_addr)); |
31b8006e | 2066 | reset_connection(con); |
6d4221b5 | 2067 | con_out_kvec_reset(con); |
5a0f8fdd AE |
2068 | ret = prepare_write_connect(con); |
2069 | if (ret < 0) | |
2070 | return ret; | |
31b8006e SW |
2071 | prepare_read_connect(con); |
2072 | ||
2073 | /* Tell ceph about it. */ | |
ec302645 | 2074 | mutex_unlock(&con->mutex); |
31b8006e SW |
2075 | pr_info("reset on %s%lld\n", ENTITY_NAME(con->peer_name)); |
2076 | if (con->ops->peer_reset) | |
2077 | con->ops->peer_reset(con); | |
ec302645 | 2078 | mutex_lock(&con->mutex); |
8dacc7da | 2079 | if (con->state != CON_STATE_NEGOTIATING) |
0da5d703 | 2080 | return -EAGAIN; |
31b8006e SW |
2081 | break; |
2082 | ||
2083 | case CEPH_MSGR_TAG_RETRY_SESSION: | |
2084 | /* | |
2085 | * If we sent a smaller connect_seq than the peer has, try | |
2086 | * again with a larger value. | |
2087 | */ | |
5bdca4e0 | 2088 | dout("process_connect got RETRY_SESSION my seq %u, peer %u\n", |
31b8006e | 2089 | le32_to_cpu(con->out_connect.connect_seq), |
5bdca4e0 SW |
2090 | le32_to_cpu(con->in_reply.connect_seq)); |
2091 | con->connect_seq = le32_to_cpu(con->in_reply.connect_seq); | |
6d4221b5 | 2092 | con_out_kvec_reset(con); |
5a0f8fdd AE |
2093 | ret = prepare_write_connect(con); |
2094 | if (ret < 0) | |
2095 | return ret; | |
31b8006e SW |
2096 | prepare_read_connect(con); |
2097 | break; | |
2098 | ||
2099 | case CEPH_MSGR_TAG_RETRY_GLOBAL: | |
2100 | /* | |
2101 | * If we sent a smaller global_seq than the peer has, try | |
2102 | * again with a larger value. | |
2103 | */ | |
eed0ef2c | 2104 | dout("process_connect got RETRY_GLOBAL my %u peer_gseq %u\n", |
31b8006e | 2105 | con->peer_global_seq, |
5bdca4e0 | 2106 | le32_to_cpu(con->in_reply.global_seq)); |
31b8006e | 2107 | get_global_seq(con->msgr, |
5bdca4e0 | 2108 | le32_to_cpu(con->in_reply.global_seq)); |
6d4221b5 | 2109 | con_out_kvec_reset(con); |
5a0f8fdd AE |
2110 | ret = prepare_write_connect(con); |
2111 | if (ret < 0) | |
2112 | return ret; | |
31b8006e SW |
2113 | prepare_read_connect(con); |
2114 | break; | |
2115 | ||
3a23083b | 2116 | case CEPH_MSGR_TAG_SEQ: |
31b8006e | 2117 | case CEPH_MSGR_TAG_READY: |
04a419f9 SW |
2118 | if (req_feat & ~server_feat) { |
2119 | pr_err("%s%lld %s protocol feature mismatch," | |
2120 | " my required %llx > server's %llx, need %llx\n", | |
2121 | ENTITY_NAME(con->peer_name), | |
3d14c5d2 | 2122 | ceph_pr_addr(&con->peer_addr.in_addr), |
04a419f9 SW |
2123 | req_feat, server_feat, req_feat & ~server_feat); |
2124 | con->error_msg = "missing required protocol features"; | |
0fa6ebc6 | 2125 | reset_connection(con); |
04a419f9 SW |
2126 | return -1; |
2127 | } | |
8dacc7da | 2128 | |
122070a2 | 2129 | WARN_ON(con->state != CON_STATE_NEGOTIATING); |
8dacc7da | 2130 | con->state = CON_STATE_OPEN; |
20e55c4c | 2131 | con->auth_retry = 0; /* we authenticated; clear flag */ |
31b8006e SW |
2132 | con->peer_global_seq = le32_to_cpu(con->in_reply.global_seq); |
2133 | con->connect_seq++; | |
aba558e2 | 2134 | con->peer_features = server_feat; |
31b8006e SW |
2135 | dout("process_connect got READY gseq %d cseq %d (%d)\n", |
2136 | con->peer_global_seq, | |
2137 | le32_to_cpu(con->in_reply.connect_seq), | |
2138 | con->connect_seq); | |
2139 | WARN_ON(con->connect_seq != | |
2140 | le32_to_cpu(con->in_reply.connect_seq)); | |
92ac41d0 SW |
2141 | |
2142 | if (con->in_reply.flags & CEPH_MSG_CONNECT_LOSSY) | |
c9ffc77a | 2143 | con_flag_set(con, CON_FLAG_LOSSYTX); |
92ac41d0 | 2144 | |
85effe18 | 2145 | con->delay = 0; /* reset backoff memory */ |
92ac41d0 | 2146 | |
3a23083b SW |
2147 | if (con->in_reply.tag == CEPH_MSGR_TAG_SEQ) { |
2148 | prepare_write_seq(con); | |
2149 | prepare_read_seq(con); | |
2150 | } else { | |
2151 | prepare_read_tag(con); | |
2152 | } | |
31b8006e SW |
2153 | break; |
2154 | ||
2155 | case CEPH_MSGR_TAG_WAIT: | |
2156 | /* | |
2157 | * If there is a connection race (we are opening | |
2158 | * connections to each other), one of us may just have | |
2159 | * to WAIT. This shouldn't happen if we are the | |
2160 | * client. | |
2161 | */ | |
04177882 SW |
2162 | con->error_msg = "protocol error, got WAIT as client"; |
2163 | return -1; | |
31b8006e SW |
2164 | |
2165 | default: | |
31b8006e SW |
2166 | con->error_msg = "protocol error, garbage tag during connect"; |
2167 | return -1; | |
2168 | } | |
2169 | return 0; | |
2170 | } | |
2171 | ||
2172 | ||
2173 | /* | |
2174 | * read (part of) an ack | |
2175 | */ | |
2176 | static int read_partial_ack(struct ceph_connection *con) | |
2177 | { | |
fd51653f AE |
2178 | int size = sizeof (con->in_temp_ack); |
2179 | int end = size; | |
31b8006e | 2180 | |
fd51653f | 2181 | return read_partial(con, end, size, &con->in_temp_ack); |
31b8006e SW |
2182 | } |
2183 | ||
31b8006e SW |
2184 | /* |
2185 | * We can finally discard anything that's been acked. | |
2186 | */ | |
2187 | static void process_ack(struct ceph_connection *con) | |
2188 | { | |
2189 | struct ceph_msg *m; | |
2190 | u64 ack = le64_to_cpu(con->in_temp_ack); | |
2191 | u64 seq; | |
2192 | ||
31b8006e SW |
2193 | while (!list_empty(&con->out_sent)) { |
2194 | m = list_first_entry(&con->out_sent, struct ceph_msg, | |
2195 | list_head); | |
2196 | seq = le64_to_cpu(m->hdr.seq); | |
2197 | if (seq > ack) | |
2198 | break; | |
2199 | dout("got ack for seq %llu type %d at %p\n", seq, | |
2200 | le16_to_cpu(m->hdr.type), m); | |
4cf9d544 | 2201 | m->ack_stamp = jiffies; |
31b8006e SW |
2202 | ceph_msg_remove(m); |
2203 | } | |
31b8006e SW |
2204 | prepare_read_tag(con); |
2205 | } | |
2206 | ||
2207 | ||
2450418c | 2208 | static int read_partial_message_section(struct ceph_connection *con, |
213c99ee SW |
2209 | struct kvec *section, |
2210 | unsigned int sec_len, u32 *crc) | |
2450418c | 2211 | { |
68b4476b | 2212 | int ret, left; |
2450418c YS |
2213 | |
2214 | BUG_ON(!section); | |
2215 | ||
2216 | while (section->iov_len < sec_len) { | |
2217 | BUG_ON(section->iov_base == NULL); | |
2218 | left = sec_len - section->iov_len; | |
2219 | ret = ceph_tcp_recvmsg(con->sock, (char *)section->iov_base + | |
2220 | section->iov_len, left); | |
2221 | if (ret <= 0) | |
2222 | return ret; | |
2223 | section->iov_len += ret; | |
2450418c | 2224 | } |
fe3ad593 AE |
2225 | if (section->iov_len == sec_len) |
2226 | *crc = crc32c(0, section->iov_base, section->iov_len); | |
31b8006e | 2227 | |
2450418c YS |
2228 | return 1; |
2229 | } | |
31b8006e | 2230 | |
34d2d200 AE |
2231 | static int read_partial_msg_data(struct ceph_connection *con) |
2232 | { | |
2233 | struct ceph_msg *msg = con->in_msg; | |
8ae4f4f5 | 2234 | struct ceph_msg_data_cursor *cursor = &msg->cursor; |
34d2d200 | 2235 | const bool do_datacrc = !con->msgr->nocrc; |
686be208 AE |
2236 | struct page *page; |
2237 | size_t page_offset; | |
2238 | size_t length; | |
f5db90bc | 2239 | u32 crc = 0; |
34d2d200 AE |
2240 | int ret; |
2241 | ||
2242 | BUG_ON(!msg); | |
5240d9f9 | 2243 | if (list_empty(&msg->data)) |
4c59b4a2 | 2244 | return -EIO; |
34d2d200 | 2245 | |
f5db90bc AE |
2246 | if (do_datacrc) |
2247 | crc = con->in_data_crc; | |
643c68a4 | 2248 | while (cursor->resid) { |
8ae4f4f5 | 2249 | page = ceph_msg_data_next(&msg->cursor, &page_offset, &length, |
4c59b4a2 | 2250 | NULL); |
686be208 | 2251 | ret = ceph_tcp_recvpage(con->sock, page, page_offset, length); |
f5db90bc AE |
2252 | if (ret <= 0) { |
2253 | if (do_datacrc) | |
2254 | con->in_data_crc = crc; | |
2255 | ||
686be208 | 2256 | return ret; |
f5db90bc | 2257 | } |
686be208 AE |
2258 | |
2259 | if (do_datacrc) | |
f5db90bc | 2260 | crc = ceph_crc32c_page(crc, page, page_offset, ret); |
8ae4f4f5 | 2261 | (void) ceph_msg_data_advance(&msg->cursor, (size_t)ret); |
34d2d200 | 2262 | } |
f5db90bc AE |
2263 | if (do_datacrc) |
2264 | con->in_data_crc = crc; | |
34d2d200 AE |
2265 | |
2266 | return 1; /* must return > 0 to indicate success */ | |
2267 | } | |
2268 | ||
31b8006e SW |
2269 | /* |
2270 | * read (part of) a message. | |
2271 | */ | |
686be208 AE |
2272 | static int ceph_con_in_msg_alloc(struct ceph_connection *con, int *skip); |
2273 | ||
31b8006e SW |
2274 | static int read_partial_message(struct ceph_connection *con) |
2275 | { | |
2276 | struct ceph_msg *m = con->in_msg; | |
fd51653f AE |
2277 | int size; |
2278 | int end; | |
31b8006e | 2279 | int ret; |
95c96174 | 2280 | unsigned int front_len, middle_len, data_len; |
37675b0f | 2281 | bool do_datacrc = !con->msgr->nocrc; |
33d07337 | 2282 | bool need_sign = (con->peer_features & CEPH_FEATURE_MSG_AUTH); |
ae18756b | 2283 | u64 seq; |
fe3ad593 | 2284 | u32 crc; |
31b8006e SW |
2285 | |
2286 | dout("read_partial_message con %p msg %p\n", con, m); | |
2287 | ||
2288 | /* header */ | |
fd51653f AE |
2289 | size = sizeof (con->in_hdr); |
2290 | end = size; | |
2291 | ret = read_partial(con, end, size, &con->in_hdr); | |
57dac9d1 AE |
2292 | if (ret <= 0) |
2293 | return ret; | |
fe3ad593 AE |
2294 | |
2295 | crc = crc32c(0, &con->in_hdr, offsetof(struct ceph_msg_header, crc)); | |
2296 | if (cpu_to_le32(crc) != con->in_hdr.crc) { | |
67c64eb7 | 2297 | pr_err("read_partial_message bad hdr crc %u != expected %u\n", |
fe3ad593 AE |
2298 | crc, con->in_hdr.crc); |
2299 | return -EBADMSG; | |
2300 | } | |
2301 | ||
31b8006e SW |
2302 | front_len = le32_to_cpu(con->in_hdr.front_len); |
2303 | if (front_len > CEPH_MSG_MAX_FRONT_LEN) | |
2304 | return -EIO; | |
2305 | middle_len = le32_to_cpu(con->in_hdr.middle_len); | |
7b11ba37 | 2306 | if (middle_len > CEPH_MSG_MAX_MIDDLE_LEN) |
31b8006e SW |
2307 | return -EIO; |
2308 | data_len = le32_to_cpu(con->in_hdr.data_len); | |
2309 | if (data_len > CEPH_MSG_MAX_DATA_LEN) | |
2310 | return -EIO; | |
2311 | ||
ae18756b SW |
2312 | /* verify seq# */ |
2313 | seq = le64_to_cpu(con->in_hdr.seq); | |
2314 | if ((s64)seq - (s64)con->in_seq < 1) { | |
df9f86fa | 2315 | pr_info("skipping %s%lld %s seq %lld expected %lld\n", |
ae18756b | 2316 | ENTITY_NAME(con->peer_name), |
3d14c5d2 | 2317 | ceph_pr_addr(&con->peer_addr.in_addr), |
ae18756b SW |
2318 | seq, con->in_seq + 1); |
2319 | con->in_base_pos = -front_len - middle_len - data_len - | |
2320 | sizeof(m->footer); | |
2321 | con->in_tag = CEPH_MSGR_TAG_READY; | |
ae18756b SW |
2322 | return 0; |
2323 | } else if ((s64)seq - (s64)con->in_seq > 1) { | |
2324 | pr_err("read_partial_message bad seq %lld expected %lld\n", | |
2325 | seq, con->in_seq + 1); | |
2326 | con->error_msg = "bad message sequence # for incoming message"; | |
67c64eb7 | 2327 | return -EBADE; |
ae18756b SW |
2328 | } |
2329 | ||
31b8006e SW |
2330 | /* allocate message? */ |
2331 | if (!con->in_msg) { | |
4740a623 SW |
2332 | int skip = 0; |
2333 | ||
31b8006e | 2334 | dout("got hdr type %d front %d data %d\n", con->in_hdr.type, |
6ebc8b32 | 2335 | front_len, data_len); |
4740a623 SW |
2336 | ret = ceph_con_in_msg_alloc(con, &skip); |
2337 | if (ret < 0) | |
2338 | return ret; | |
f759ebb9 AE |
2339 | |
2340 | BUG_ON(!con->in_msg ^ skip); | |
2450418c | 2341 | if (skip) { |
31b8006e | 2342 | /* skip this message */ |
a79832f2 | 2343 | dout("alloc_msg said skip message\n"); |
31b8006e SW |
2344 | con->in_base_pos = -front_len - middle_len - data_len - |
2345 | sizeof(m->footer); | |
2346 | con->in_tag = CEPH_MSGR_TAG_READY; | |
684be25c | 2347 | con->in_seq++; |
31b8006e SW |
2348 | return 0; |
2349 | } | |
38941f80 | 2350 | |
4740a623 | 2351 | BUG_ON(!con->in_msg); |
38941f80 | 2352 | BUG_ON(con->in_msg->con != con); |
31b8006e SW |
2353 | m = con->in_msg; |
2354 | m->front.iov_len = 0; /* haven't read it yet */ | |
2450418c YS |
2355 | if (m->middle) |
2356 | m->middle->vec.iov_len = 0; | |
9d7f0f13 | 2357 | |
78625051 | 2358 | /* prepare for data payload, if any */ |
a4107026 | 2359 | |
78625051 | 2360 | if (data_len) |
98fa5dd8 | 2361 | prepare_message_data(con->in_msg, data_len); |
31b8006e SW |
2362 | } |
2363 | ||
2364 | /* front */ | |
2450418c YS |
2365 | ret = read_partial_message_section(con, &m->front, front_len, |
2366 | &con->in_front_crc); | |
2367 | if (ret <= 0) | |
2368 | return ret; | |
31b8006e SW |
2369 | |
2370 | /* middle */ | |
2450418c | 2371 | if (m->middle) { |
213c99ee SW |
2372 | ret = read_partial_message_section(con, &m->middle->vec, |
2373 | middle_len, | |
2450418c | 2374 | &con->in_middle_crc); |
31b8006e SW |
2375 | if (ret <= 0) |
2376 | return ret; | |
31b8006e SW |
2377 | } |
2378 | ||
2379 | /* (page) data */ | |
34d2d200 AE |
2380 | if (data_len) { |
2381 | ret = read_partial_msg_data(con); | |
2382 | if (ret <= 0) | |
2383 | return ret; | |
31b8006e SW |
2384 | } |
2385 | ||
31b8006e | 2386 | /* footer */ |
33d07337 YZ |
2387 | if (need_sign) |
2388 | size = sizeof(m->footer); | |
2389 | else | |
2390 | size = sizeof(m->old_footer); | |
2391 | ||
fd51653f AE |
2392 | end += size; |
2393 | ret = read_partial(con, end, size, &m->footer); | |
57dac9d1 AE |
2394 | if (ret <= 0) |
2395 | return ret; | |
2396 | ||
33d07337 YZ |
2397 | if (!need_sign) { |
2398 | m->footer.flags = m->old_footer.flags; | |
2399 | m->footer.sig = 0; | |
2400 | } | |
2401 | ||
31b8006e SW |
2402 | dout("read_partial_message got msg %p %d (%u) + %d (%u) + %d (%u)\n", |
2403 | m, front_len, m->footer.front_crc, middle_len, | |
2404 | m->footer.middle_crc, data_len, m->footer.data_crc); | |
2405 | ||
2406 | /* crc ok? */ | |
2407 | if (con->in_front_crc != le32_to_cpu(m->footer.front_crc)) { | |
2408 | pr_err("read_partial_message %p front crc %u != exp. %u\n", | |
2409 | m, con->in_front_crc, m->footer.front_crc); | |
2410 | return -EBADMSG; | |
2411 | } | |
2412 | if (con->in_middle_crc != le32_to_cpu(m->footer.middle_crc)) { | |
2413 | pr_err("read_partial_message %p middle crc %u != exp %u\n", | |
2414 | m, con->in_middle_crc, m->footer.middle_crc); | |
2415 | return -EBADMSG; | |
2416 | } | |
bca064d2 | 2417 | if (do_datacrc && |
31b8006e SW |
2418 | (m->footer.flags & CEPH_MSG_FOOTER_NOCRC) == 0 && |
2419 | con->in_data_crc != le32_to_cpu(m->footer.data_crc)) { | |
2420 | pr_err("read_partial_message %p data crc %u != exp. %u\n", m, | |
2421 | con->in_data_crc, le32_to_cpu(m->footer.data_crc)); | |
2422 | return -EBADMSG; | |
2423 | } | |
2424 | ||
33d07337 YZ |
2425 | if (need_sign && con->ops->check_message_signature && |
2426 | con->ops->check_message_signature(con, m)) { | |
2427 | pr_err("read_partial_message %p signature check failed\n", m); | |
2428 | return -EBADMSG; | |
2429 | } | |
2430 | ||
31b8006e SW |
2431 | return 1; /* done! */ |
2432 | } | |
2433 | ||
2434 | /* | |
2435 | * Process message. This happens in the worker thread. The callback should | |
2436 | * be careful not to do anything that waits on other incoming messages or it | |
2437 | * may deadlock. | |
2438 | */ | |
2439 | static void process_message(struct ceph_connection *con) | |
2440 | { | |
5e095e8b | 2441 | struct ceph_msg *msg; |
31b8006e | 2442 | |
38941f80 AE |
2443 | BUG_ON(con->in_msg->con != con); |
2444 | con->in_msg->con = NULL; | |
5e095e8b | 2445 | msg = con->in_msg; |
31b8006e | 2446 | con->in_msg = NULL; |
36eb71aa | 2447 | con->ops->put(con); |
31b8006e SW |
2448 | |
2449 | /* if first message, set peer_name */ | |
2450 | if (con->peer_name.type == 0) | |
dbad185d | 2451 | con->peer_name = msg->hdr.src; |
31b8006e | 2452 | |
31b8006e | 2453 | con->in_seq++; |
ec302645 | 2454 | mutex_unlock(&con->mutex); |
31b8006e SW |
2455 | |
2456 | dout("===== %p %llu from %s%lld %d=%s len %d+%d (%u %u %u) =====\n", | |
2457 | msg, le64_to_cpu(msg->hdr.seq), | |
dbad185d | 2458 | ENTITY_NAME(msg->hdr.src), |
31b8006e SW |
2459 | le16_to_cpu(msg->hdr.type), |
2460 | ceph_msg_type_name(le16_to_cpu(msg->hdr.type)), | |
2461 | le32_to_cpu(msg->hdr.front_len), | |
2462 | le32_to_cpu(msg->hdr.data_len), | |
2463 | con->in_front_crc, con->in_middle_crc, con->in_data_crc); | |
2464 | con->ops->dispatch(con, msg); | |
ec302645 SW |
2465 | |
2466 | mutex_lock(&con->mutex); | |
31b8006e SW |
2467 | } |
2468 | ||
8b9558aa YZ |
2469 | static int read_keepalive_ack(struct ceph_connection *con) |
2470 | { | |
2471 | struct ceph_timespec ceph_ts; | |
2472 | size_t size = sizeof(ceph_ts); | |
2473 | int ret = read_partial(con, size, size, &ceph_ts); | |
2474 | if (ret <= 0) | |
2475 | return ret; | |
2476 | ceph_decode_timespec(&con->last_keepalive_ack, &ceph_ts); | |
2477 | prepare_read_tag(con); | |
2478 | return 1; | |
2479 | } | |
31b8006e SW |
2480 | |
2481 | /* | |
2482 | * Write something to the socket. Called in a worker thread when the | |
2483 | * socket appears to be writeable and we have something ready to send. | |
2484 | */ | |
2485 | static int try_write(struct ceph_connection *con) | |
2486 | { | |
31b8006e SW |
2487 | int ret = 1; |
2488 | ||
d59315ca | 2489 | dout("try_write start %p state %lu\n", con, con->state); |
31b8006e | 2490 | |
31b8006e SW |
2491 | more: |
2492 | dout("try_write out_kvec_bytes %d\n", con->out_kvec_bytes); | |
2493 | ||
2494 | /* open the socket first? */ | |
8dacc7da SW |
2495 | if (con->state == CON_STATE_PREOPEN) { |
2496 | BUG_ON(con->sock); | |
2497 | con->state = CON_STATE_CONNECTING; | |
a5988c49 | 2498 | |
e2200423 | 2499 | con_out_kvec_reset(con); |
e825a66d | 2500 | prepare_write_banner(con); |
eed0ef2c | 2501 | prepare_read_banner(con); |
31b8006e | 2502 | |
cf3e5c40 | 2503 | BUG_ON(con->in_msg); |
31b8006e SW |
2504 | con->in_tag = CEPH_MSGR_TAG_READY; |
2505 | dout("try_write initiating connect on %p new state %lu\n", | |
2506 | con, con->state); | |
41617d0c AE |
2507 | ret = ceph_tcp_connect(con); |
2508 | if (ret < 0) { | |
31b8006e | 2509 | con->error_msg = "connect error"; |
31b8006e SW |
2510 | goto out; |
2511 | } | |
2512 | } | |
2513 | ||
2514 | more_kvec: | |
2515 | /* kvec data queued? */ | |
2516 | if (con->out_skip) { | |
2517 | ret = write_partial_skip(con); | |
2518 | if (ret <= 0) | |
42961d23 | 2519 | goto out; |
31b8006e SW |
2520 | } |
2521 | if (con->out_kvec_left) { | |
2522 | ret = write_partial_kvec(con); | |
2523 | if (ret <= 0) | |
42961d23 | 2524 | goto out; |
31b8006e SW |
2525 | } |
2526 | ||
2527 | /* msg pages? */ | |
2528 | if (con->out_msg) { | |
c86a2930 SW |
2529 | if (con->out_msg_done) { |
2530 | ceph_msg_put(con->out_msg); | |
2531 | con->out_msg = NULL; /* we're done with this one */ | |
2532 | goto do_next; | |
2533 | } | |
2534 | ||
34d2d200 | 2535 | ret = write_partial_message_data(con); |
31b8006e SW |
2536 | if (ret == 1) |
2537 | goto more_kvec; /* we need to send the footer, too! */ | |
2538 | if (ret == 0) | |
42961d23 | 2539 | goto out; |
31b8006e | 2540 | if (ret < 0) { |
34d2d200 | 2541 | dout("try_write write_partial_message_data err %d\n", |
31b8006e | 2542 | ret); |
42961d23 | 2543 | goto out; |
31b8006e SW |
2544 | } |
2545 | } | |
2546 | ||
c86a2930 | 2547 | do_next: |
8dacc7da | 2548 | if (con->state == CON_STATE_OPEN) { |
8b9558aa YZ |
2549 | if (con_flag_test_and_clear(con, CON_FLAG_KEEPALIVE_PENDING)) { |
2550 | prepare_write_keepalive(con); | |
2551 | goto more; | |
2552 | } | |
31b8006e SW |
2553 | /* is anything else pending? */ |
2554 | if (!list_empty(&con->out_queue)) { | |
2555 | prepare_write_message(con); | |
2556 | goto more; | |
2557 | } | |
2558 | if (con->in_seq > con->in_seq_acked) { | |
2559 | prepare_write_ack(con); | |
2560 | goto more; | |
2561 | } | |
31b8006e SW |
2562 | } |
2563 | ||
2564 | /* Nothing to do! */ | |
c9ffc77a | 2565 | con_flag_clear(con, CON_FLAG_WRITE_PENDING); |
31b8006e | 2566 | dout("try_write nothing else to write.\n"); |
31b8006e SW |
2567 | ret = 0; |
2568 | out: | |
42961d23 | 2569 | dout("try_write done on %p ret %d\n", con, ret); |
31b8006e SW |
2570 | return ret; |
2571 | } | |
2572 | ||
2573 | ||
2574 | ||
2575 | /* | |
2576 | * Read what we can from the socket. | |
2577 | */ | |
2578 | static int try_read(struct ceph_connection *con) | |
2579 | { | |
31b8006e SW |
2580 | int ret = -1; |
2581 | ||
8dacc7da SW |
2582 | more: |
2583 | dout("try_read start on %p state %lu\n", con, con->state); | |
2584 | if (con->state != CON_STATE_CONNECTING && | |
2585 | con->state != CON_STATE_NEGOTIATING && | |
2586 | con->state != CON_STATE_OPEN) | |
31b8006e SW |
2587 | return 0; |
2588 | ||
8dacc7da | 2589 | BUG_ON(!con->sock); |
ec302645 | 2590 | |
31b8006e SW |
2591 | dout("try_read tag %d in_base_pos %d\n", (int)con->in_tag, |
2592 | con->in_base_pos); | |
0da5d703 | 2593 | |
8dacc7da | 2594 | if (con->state == CON_STATE_CONNECTING) { |
7593af92 AE |
2595 | dout("try_read connecting\n"); |
2596 | ret = read_partial_banner(con); | |
2597 | if (ret <= 0) | |
ab166d5a | 2598 | goto out; |
7593af92 AE |
2599 | ret = process_banner(con); |
2600 | if (ret < 0) | |
2601 | goto out; | |
2602 | ||
8dacc7da | 2603 | con->state = CON_STATE_NEGOTIATING; |
7593af92 | 2604 | |
6d4221b5 JS |
2605 | /* |
2606 | * Received banner is good, exchange connection info. | |
2607 | * Do not reset out_kvec, as sending our banner raced | |
2608 | * with receiving peer banner after connect completed. | |
2609 | */ | |
7593af92 AE |
2610 | ret = prepare_write_connect(con); |
2611 | if (ret < 0) | |
2612 | goto out; | |
2613 | prepare_read_connect(con); | |
2614 | ||
2615 | /* Send connection info before awaiting response */ | |
0da5d703 SW |
2616 | goto out; |
2617 | } | |
2618 | ||
8dacc7da | 2619 | if (con->state == CON_STATE_NEGOTIATING) { |
7593af92 | 2620 | dout("try_read negotiating\n"); |
31b8006e SW |
2621 | ret = read_partial_connect(con); |
2622 | if (ret <= 0) | |
31b8006e | 2623 | goto out; |
98bdb0aa SW |
2624 | ret = process_connect(con); |
2625 | if (ret < 0) | |
2626 | goto out; | |
31b8006e SW |
2627 | goto more; |
2628 | } | |
2629 | ||
122070a2 | 2630 | WARN_ON(con->state != CON_STATE_OPEN); |
8dacc7da | 2631 | |
31b8006e SW |
2632 | if (con->in_base_pos < 0) { |
2633 | /* | |
2634 | * skipping + discarding content. | |
2635 | * | |
2636 | * FIXME: there must be a better way to do this! | |
2637 | */ | |
84495f49 AE |
2638 | static char buf[SKIP_BUF_SIZE]; |
2639 | int skip = min((int) sizeof (buf), -con->in_base_pos); | |
2640 | ||
31b8006e SW |
2641 | dout("skipping %d / %d bytes\n", skip, -con->in_base_pos); |
2642 | ret = ceph_tcp_recvmsg(con->sock, buf, skip); | |
2643 | if (ret <= 0) | |
98bdb0aa | 2644 | goto out; |
31b8006e SW |
2645 | con->in_base_pos += ret; |
2646 | if (con->in_base_pos) | |
2647 | goto more; | |
2648 | } | |
2649 | if (con->in_tag == CEPH_MSGR_TAG_READY) { | |
2650 | /* | |
2651 | * what's next? | |
2652 | */ | |
2653 | ret = ceph_tcp_recvmsg(con->sock, &con->in_tag, 1); | |
2654 | if (ret <= 0) | |
98bdb0aa | 2655 | goto out; |
31b8006e SW |
2656 | dout("try_read got tag %d\n", (int)con->in_tag); |
2657 | switch (con->in_tag) { | |
2658 | case CEPH_MSGR_TAG_MSG: | |
2659 | prepare_read_message(con); | |
2660 | break; | |
2661 | case CEPH_MSGR_TAG_ACK: | |
2662 | prepare_read_ack(con); | |
2663 | break; | |
8b9558aa YZ |
2664 | case CEPH_MSGR_TAG_KEEPALIVE2_ACK: |
2665 | prepare_read_keepalive_ack(con); | |
2666 | break; | |
31b8006e | 2667 | case CEPH_MSGR_TAG_CLOSE: |
8dacc7da SW |
2668 | con_close_socket(con); |
2669 | con->state = CON_STATE_CLOSED; | |
98bdb0aa | 2670 | goto out; |
31b8006e SW |
2671 | default: |
2672 | goto bad_tag; | |
2673 | } | |
2674 | } | |
2675 | if (con->in_tag == CEPH_MSGR_TAG_MSG) { | |
2676 | ret = read_partial_message(con); | |
2677 | if (ret <= 0) { | |
2678 | switch (ret) { | |
2679 | case -EBADMSG: | |
2680 | con->error_msg = "bad crc"; | |
67c64eb7 ID |
2681 | /* fall through */ |
2682 | case -EBADE: | |
31b8006e | 2683 | ret = -EIO; |
98bdb0aa | 2684 | break; |
31b8006e SW |
2685 | case -EIO: |
2686 | con->error_msg = "io error"; | |
98bdb0aa | 2687 | break; |
31b8006e | 2688 | } |
98bdb0aa | 2689 | goto out; |
31b8006e SW |
2690 | } |
2691 | if (con->in_tag == CEPH_MSGR_TAG_READY) | |
2692 | goto more; | |
2693 | process_message(con); | |
7b862e07 SW |
2694 | if (con->state == CON_STATE_OPEN) |
2695 | prepare_read_tag(con); | |
31b8006e SW |
2696 | goto more; |
2697 | } | |
3a23083b SW |
2698 | if (con->in_tag == CEPH_MSGR_TAG_ACK || |
2699 | con->in_tag == CEPH_MSGR_TAG_SEQ) { | |
2700 | /* | |
2701 | * the final handshake seq exchange is semantically | |
2702 | * equivalent to an ACK | |
2703 | */ | |
31b8006e SW |
2704 | ret = read_partial_ack(con); |
2705 | if (ret <= 0) | |
98bdb0aa | 2706 | goto out; |
31b8006e SW |
2707 | process_ack(con); |
2708 | goto more; | |
2709 | } | |
8b9558aa YZ |
2710 | if (con->in_tag == CEPH_MSGR_TAG_KEEPALIVE2_ACK) { |
2711 | ret = read_keepalive_ack(con); | |
2712 | if (ret <= 0) | |
2713 | goto out; | |
2714 | goto more; | |
2715 | } | |
31b8006e | 2716 | |
31b8006e | 2717 | out: |
98bdb0aa | 2718 | dout("try_read done on %p ret %d\n", con, ret); |
31b8006e SW |
2719 | return ret; |
2720 | ||
2721 | bad_tag: | |
2722 | pr_err("try_read bad con->in_tag = %d\n", (int)con->in_tag); | |
2723 | con->error_msg = "protocol error, garbage tag"; | |
2724 | ret = -1; | |
2725 | goto out; | |
2726 | } | |
2727 | ||
2728 | ||
2729 | /* | |
802c6d96 AE |
2730 | * Atomically queue work on a connection after the specified delay. |
2731 | * Bump @con reference to avoid races with connection teardown. | |
2732 | * Returns 0 if work was queued, or an error code otherwise. | |
31b8006e | 2733 | */ |
802c6d96 | 2734 | static int queue_con_delay(struct ceph_connection *con, unsigned long delay) |
31b8006e | 2735 | { |
31b8006e | 2736 | if (!con->ops->get(con)) { |
802c6d96 | 2737 | dout("%s %p ref count 0\n", __func__, con); |
802c6d96 | 2738 | return -ENOENT; |
31b8006e SW |
2739 | } |
2740 | ||
802c6d96 AE |
2741 | if (!queue_delayed_work(ceph_msgr_wq, &con->work, delay)) { |
2742 | dout("%s %p - already queued\n", __func__, con); | |
31b8006e | 2743 | con->ops->put(con); |
802c6d96 | 2744 | return -EBUSY; |
31b8006e | 2745 | } |
802c6d96 AE |
2746 | |
2747 | dout("%s %p %lu\n", __func__, con, delay); | |
802c6d96 AE |
2748 | return 0; |
2749 | } | |
2750 | ||
2751 | static void queue_con(struct ceph_connection *con) | |
2752 | { | |
2753 | (void) queue_con_delay(con, 0); | |
31b8006e SW |
2754 | } |
2755 | ||
37ab77ac ID |
2756 | static void cancel_con(struct ceph_connection *con) |
2757 | { | |
2758 | if (cancel_delayed_work(&con->work)) { | |
2759 | dout("%s %p\n", __func__, con); | |
2760 | con->ops->put(con); | |
2761 | } | |
2762 | } | |
2763 | ||
7bb21d68 AE |
2764 | static bool con_sock_closed(struct ceph_connection *con) |
2765 | { | |
c9ffc77a | 2766 | if (!con_flag_test_and_clear(con, CON_FLAG_SOCK_CLOSED)) |
7bb21d68 AE |
2767 | return false; |
2768 | ||
2769 | #define CASE(x) \ | |
2770 | case CON_STATE_ ## x: \ | |
2771 | con->error_msg = "socket closed (con state " #x ")"; \ | |
2772 | break; | |
2773 | ||
2774 | switch (con->state) { | |
2775 | CASE(CLOSED); | |
2776 | CASE(PREOPEN); | |
2777 | CASE(CONNECTING); | |
2778 | CASE(NEGOTIATING); | |
2779 | CASE(OPEN); | |
2780 | CASE(STANDBY); | |
2781 | default: | |
b9a67899 | 2782 | pr_warn("%s con %p unrecognized state %lu\n", |
7bb21d68 AE |
2783 | __func__, con, con->state); |
2784 | con->error_msg = "unrecognized con state"; | |
2785 | BUG(); | |
2786 | break; | |
2787 | } | |
2788 | #undef CASE | |
2789 | ||
2790 | return true; | |
2791 | } | |
2792 | ||
f20a39fd AE |
2793 | static bool con_backoff(struct ceph_connection *con) |
2794 | { | |
2795 | int ret; | |
2796 | ||
2797 | if (!con_flag_test_and_clear(con, CON_FLAG_BACKOFF)) | |
2798 | return false; | |
2799 | ||
2800 | ret = queue_con_delay(con, round_jiffies_relative(con->delay)); | |
2801 | if (ret) { | |
2802 | dout("%s: con %p FAILED to back off %lu\n", __func__, | |
2803 | con, con->delay); | |
2804 | BUG_ON(ret == -ENOENT); | |
2805 | con_flag_set(con, CON_FLAG_BACKOFF); | |
2806 | } | |
2807 | ||
2808 | return true; | |
2809 | } | |
2810 | ||
93209264 AE |
2811 | /* Finish fault handling; con->mutex must *not* be held here */ |
2812 | ||
2813 | static void con_fault_finish(struct ceph_connection *con) | |
2814 | { | |
2815 | /* | |
2816 | * in case we faulted due to authentication, invalidate our | |
2817 | * current tickets so that we can get new ones. | |
2818 | */ | |
2819 | if (con->auth_retry && con->ops->invalidate_authorizer) { | |
2820 | dout("calling invalidate_authorizer()\n"); | |
2821 | con->ops->invalidate_authorizer(con); | |
2822 | } | |
2823 | ||
2824 | if (con->ops->fault) | |
2825 | con->ops->fault(con); | |
2826 | } | |
2827 | ||
31b8006e SW |
2828 | /* |
2829 | * Do some work on a connection. Drop a connection ref when we're done. | |
2830 | */ | |
68931622 | 2831 | static void ceph_con_workfn(struct work_struct *work) |
31b8006e SW |
2832 | { |
2833 | struct ceph_connection *con = container_of(work, struct ceph_connection, | |
2834 | work.work); | |
49659416 | 2835 | bool fault; |
31b8006e | 2836 | |
9dd4658d | 2837 | mutex_lock(&con->mutex); |
49659416 AE |
2838 | while (true) { |
2839 | int ret; | |
31b8006e | 2840 | |
49659416 AE |
2841 | if ((fault = con_sock_closed(con))) { |
2842 | dout("%s: con %p SOCK_CLOSED\n", __func__, con); | |
2843 | break; | |
2844 | } | |
2845 | if (con_backoff(con)) { | |
2846 | dout("%s: con %p BACKOFF\n", __func__, con); | |
2847 | break; | |
2848 | } | |
2849 | if (con->state == CON_STATE_STANDBY) { | |
2850 | dout("%s: con %p STANDBY\n", __func__, con); | |
2851 | break; | |
2852 | } | |
2853 | if (con->state == CON_STATE_CLOSED) { | |
2854 | dout("%s: con %p CLOSED\n", __func__, con); | |
2855 | BUG_ON(con->sock); | |
2856 | break; | |
2857 | } | |
2858 | if (con->state == CON_STATE_PREOPEN) { | |
2859 | dout("%s: con %p PREOPEN\n", __func__, con); | |
2860 | BUG_ON(con->sock); | |
2861 | } | |
0da5d703 | 2862 | |
49659416 AE |
2863 | ret = try_read(con); |
2864 | if (ret < 0) { | |
2865 | if (ret == -EAGAIN) | |
2866 | continue; | |
67c64eb7 ID |
2867 | if (!con->error_msg) |
2868 | con->error_msg = "socket error on read"; | |
49659416 AE |
2869 | fault = true; |
2870 | break; | |
2871 | } | |
2872 | ||
2873 | ret = try_write(con); | |
2874 | if (ret < 0) { | |
2875 | if (ret == -EAGAIN) | |
2876 | continue; | |
67c64eb7 ID |
2877 | if (!con->error_msg) |
2878 | con->error_msg = "socket error on write"; | |
49659416 AE |
2879 | fault = true; |
2880 | } | |
2881 | ||
2882 | break; /* If we make it to here, we're done */ | |
3a140a0d | 2883 | } |
b6e7b6a1 AE |
2884 | if (fault) |
2885 | con_fault(con); | |
9dd4658d | 2886 | mutex_unlock(&con->mutex); |
0da5d703 | 2887 | |
b6e7b6a1 AE |
2888 | if (fault) |
2889 | con_fault_finish(con); | |
2890 | ||
2891 | con->ops->put(con); | |
31b8006e SW |
2892 | } |
2893 | ||
31b8006e SW |
2894 | /* |
2895 | * Generic error/fault handler. A retry mechanism is used with | |
2896 | * exponential backoff | |
2897 | */ | |
93209264 | 2898 | static void con_fault(struct ceph_connection *con) |
31b8006e | 2899 | { |
31b8006e | 2900 | dout("fault %p state %lu to peer %s\n", |
3d14c5d2 | 2901 | con, con->state, ceph_pr_addr(&con->peer_addr.in_addr)); |
31b8006e | 2902 | |
67c64eb7 ID |
2903 | pr_warn("%s%lld %s %s\n", ENTITY_NAME(con->peer_name), |
2904 | ceph_pr_addr(&con->peer_addr.in_addr), con->error_msg); | |
2905 | con->error_msg = NULL; | |
2906 | ||
122070a2 | 2907 | WARN_ON(con->state != CON_STATE_CONNECTING && |
8dacc7da SW |
2908 | con->state != CON_STATE_NEGOTIATING && |
2909 | con->state != CON_STATE_OPEN); | |
ec302645 | 2910 | |
31b8006e | 2911 | con_close_socket(con); |
5e095e8b | 2912 | |
c9ffc77a | 2913 | if (con_flag_test(con, CON_FLAG_LOSSYTX)) { |
8dacc7da SW |
2914 | dout("fault on LOSSYTX channel, marking CLOSED\n"); |
2915 | con->state = CON_STATE_CLOSED; | |
93209264 | 2916 | return; |
3b5ede07 SW |
2917 | } |
2918 | ||
5e095e8b | 2919 | if (con->in_msg) { |
38941f80 AE |
2920 | BUG_ON(con->in_msg->con != con); |
2921 | con->in_msg->con = NULL; | |
5e095e8b SW |
2922 | ceph_msg_put(con->in_msg); |
2923 | con->in_msg = NULL; | |
36eb71aa | 2924 | con->ops->put(con); |
5e095e8b | 2925 | } |
31b8006e | 2926 | |
e80a52d1 SW |
2927 | /* Requeue anything that hasn't been acked */ |
2928 | list_splice_init(&con->out_sent, &con->out_queue); | |
9bd2e6f8 | 2929 | |
e76661d0 SW |
2930 | /* If there are no messages queued or keepalive pending, place |
2931 | * the connection in a STANDBY state */ | |
2932 | if (list_empty(&con->out_queue) && | |
c9ffc77a | 2933 | !con_flag_test(con, CON_FLAG_KEEPALIVE_PENDING)) { |
e00de341 | 2934 | dout("fault %p setting STANDBY clearing WRITE_PENDING\n", con); |
c9ffc77a | 2935 | con_flag_clear(con, CON_FLAG_WRITE_PENDING); |
8dacc7da | 2936 | con->state = CON_STATE_STANDBY; |
e80a52d1 SW |
2937 | } else { |
2938 | /* retry after a delay. */ | |
8dacc7da | 2939 | con->state = CON_STATE_PREOPEN; |
e80a52d1 SW |
2940 | if (con->delay == 0) |
2941 | con->delay = BASE_DELAY_INTERVAL; | |
2942 | else if (con->delay < MAX_DELAY_INTERVAL) | |
2943 | con->delay *= 2; | |
c9ffc77a | 2944 | con_flag_set(con, CON_FLAG_BACKOFF); |
8618e30b | 2945 | queue_con(con); |
31b8006e | 2946 | } |
31b8006e SW |
2947 | } |
2948 | ||
2949 | ||
2950 | ||
2951 | /* | |
15d9882c | 2952 | * initialize a new messenger instance |
31b8006e | 2953 | */ |
15d9882c AE |
2954 | void ceph_messenger_init(struct ceph_messenger *msgr, |
2955 | struct ceph_entity_addr *myaddr, | |
12b4629a ID |
2956 | u64 supported_features, |
2957 | u64 required_features, | |
ba988f87 CH |
2958 | bool nocrc, |
2959 | bool tcp_nodelay) | |
31b8006e | 2960 | { |
3d14c5d2 YS |
2961 | msgr->supported_features = supported_features; |
2962 | msgr->required_features = required_features; | |
2963 | ||
31b8006e SW |
2964 | spin_lock_init(&msgr->global_seq_lock); |
2965 | ||
31b8006e SW |
2966 | if (myaddr) |
2967 | msgr->inst.addr = *myaddr; | |
2968 | ||
2969 | /* select a random nonce */ | |
ac8839d7 | 2970 | msgr->inst.addr.type = 0; |
103e2d3a | 2971 | get_random_bytes(&msgr->inst.addr.nonce, sizeof(msgr->inst.addr.nonce)); |
63f2d211 | 2972 | encode_my_addr(msgr); |
15d9882c | 2973 | msgr->nocrc = nocrc; |
ba988f87 | 2974 | msgr->tcp_nodelay = tcp_nodelay; |
31b8006e | 2975 | |
a2a32584 | 2976 | atomic_set(&msgr->stopping, 0); |
757856d2 | 2977 | write_pnet(&msgr->net, get_net(current->nsproxy->net_ns)); |
31b8006e | 2978 | |
15d9882c | 2979 | dout("%s %p\n", __func__, msgr); |
31b8006e | 2980 | } |
15d9882c | 2981 | EXPORT_SYMBOL(ceph_messenger_init); |
31b8006e | 2982 | |
757856d2 ID |
2983 | void ceph_messenger_fini(struct ceph_messenger *msgr) |
2984 | { | |
2985 | put_net(read_pnet(&msgr->net)); | |
2986 | } | |
2987 | EXPORT_SYMBOL(ceph_messenger_fini); | |
2988 | ||
e00de341 SW |
2989 | static void clear_standby(struct ceph_connection *con) |
2990 | { | |
2991 | /* come back from STANDBY? */ | |
8dacc7da | 2992 | if (con->state == CON_STATE_STANDBY) { |
e00de341 | 2993 | dout("clear_standby %p and ++connect_seq\n", con); |
8dacc7da | 2994 | con->state = CON_STATE_PREOPEN; |
e00de341 | 2995 | con->connect_seq++; |
c9ffc77a AE |
2996 | WARN_ON(con_flag_test(con, CON_FLAG_WRITE_PENDING)); |
2997 | WARN_ON(con_flag_test(con, CON_FLAG_KEEPALIVE_PENDING)); | |
e00de341 SW |
2998 | } |
2999 | } | |
3000 | ||
31b8006e SW |
3001 | /* |
3002 | * Queue up an outgoing message on the given connection. | |
3003 | */ | |
3004 | void ceph_con_send(struct ceph_connection *con, struct ceph_msg *msg) | |
3005 | { | |
31b8006e | 3006 | /* set src+dst */ |
dbad185d | 3007 | msg->hdr.src = con->msgr->inst.name; |
3ca02ef9 | 3008 | BUG_ON(msg->front.iov_len != le32_to_cpu(msg->hdr.front_len)); |
e84346b7 SW |
3009 | msg->needs_out_seq = true; |
3010 | ||
ec302645 | 3011 | mutex_lock(&con->mutex); |
92ce034b | 3012 | |
8dacc7da | 3013 | if (con->state == CON_STATE_CLOSED) { |
a59b55a6 SW |
3014 | dout("con_send %p closed, dropping %p\n", con, msg); |
3015 | ceph_msg_put(msg); | |
3016 | mutex_unlock(&con->mutex); | |
3017 | return; | |
3018 | } | |
3019 | ||
38941f80 | 3020 | BUG_ON(msg->con != NULL); |
36eb71aa | 3021 | msg->con = con->ops->get(con); |
92ce034b AE |
3022 | BUG_ON(msg->con == NULL); |
3023 | ||
31b8006e SW |
3024 | BUG_ON(!list_empty(&msg->list_head)); |
3025 | list_add_tail(&msg->list_head, &con->out_queue); | |
3026 | dout("----- %p to %s%lld %d=%s len %d+%d+%d -----\n", msg, | |
3027 | ENTITY_NAME(con->peer_name), le16_to_cpu(msg->hdr.type), | |
3028 | ceph_msg_type_name(le16_to_cpu(msg->hdr.type)), | |
3029 | le32_to_cpu(msg->hdr.front_len), | |
3030 | le32_to_cpu(msg->hdr.middle_len), | |
3031 | le32_to_cpu(msg->hdr.data_len)); | |
00650931 SW |
3032 | |
3033 | clear_standby(con); | |
ec302645 | 3034 | mutex_unlock(&con->mutex); |
31b8006e SW |
3035 | |
3036 | /* if there wasn't anything waiting to send before, queue | |
3037 | * new work */ | |
c9ffc77a | 3038 | if (con_flag_test_and_set(con, CON_FLAG_WRITE_PENDING) == 0) |
31b8006e SW |
3039 | queue_con(con); |
3040 | } | |
3d14c5d2 | 3041 | EXPORT_SYMBOL(ceph_con_send); |
31b8006e SW |
3042 | |
3043 | /* | |
3044 | * Revoke a message that was previously queued for send | |
3045 | */ | |
6740a845 | 3046 | void ceph_msg_revoke(struct ceph_msg *msg) |
31b8006e | 3047 | { |
6740a845 AE |
3048 | struct ceph_connection *con = msg->con; |
3049 | ||
3050 | if (!con) | |
3051 | return; /* Message not in our possession */ | |
3052 | ||
ec302645 | 3053 | mutex_lock(&con->mutex); |
31b8006e | 3054 | if (!list_empty(&msg->list_head)) { |
38941f80 | 3055 | dout("%s %p msg %p - was on queue\n", __func__, con, msg); |
31b8006e | 3056 | list_del_init(&msg->list_head); |
38941f80 | 3057 | BUG_ON(msg->con == NULL); |
36eb71aa | 3058 | msg->con->ops->put(msg->con); |
38941f80 | 3059 | msg->con = NULL; |
31b8006e | 3060 | msg->hdr.seq = 0; |
38941f80 | 3061 | |
31b8006e | 3062 | ceph_msg_put(msg); |
ed98adad SW |
3063 | } |
3064 | if (con->out_msg == msg) { | |
38941f80 | 3065 | dout("%s %p msg %p - was sending\n", __func__, con, msg); |
ed98adad | 3066 | con->out_msg = NULL; |
31b8006e SW |
3067 | if (con->out_kvec_is_msg) { |
3068 | con->out_skip = con->out_kvec_bytes; | |
3069 | con->out_kvec_is_msg = false; | |
3070 | } | |
ed98adad | 3071 | msg->hdr.seq = 0; |
92ce034b AE |
3072 | |
3073 | ceph_msg_put(msg); | |
31b8006e | 3074 | } |
ec302645 | 3075 | mutex_unlock(&con->mutex); |
31b8006e SW |
3076 | } |
3077 | ||
350b1c32 | 3078 | /* |
0d59ab81 | 3079 | * Revoke a message that we may be reading data into |
350b1c32 | 3080 | */ |
8921d114 | 3081 | void ceph_msg_revoke_incoming(struct ceph_msg *msg) |
350b1c32 | 3082 | { |
8921d114 AE |
3083 | struct ceph_connection *con; |
3084 | ||
3085 | BUG_ON(msg == NULL); | |
3086 | if (!msg->con) { | |
3087 | dout("%s msg %p null con\n", __func__, msg); | |
3088 | ||
3089 | return; /* Message not in our possession */ | |
3090 | } | |
3091 | ||
3092 | con = msg->con; | |
350b1c32 | 3093 | mutex_lock(&con->mutex); |
8921d114 | 3094 | if (con->in_msg == msg) { |
95c96174 ED |
3095 | unsigned int front_len = le32_to_cpu(con->in_hdr.front_len); |
3096 | unsigned int middle_len = le32_to_cpu(con->in_hdr.middle_len); | |
3097 | unsigned int data_len = le32_to_cpu(con->in_hdr.data_len); | |
350b1c32 SW |
3098 | |
3099 | /* skip rest of message */ | |
8921d114 AE |
3100 | dout("%s %p msg %p revoked\n", __func__, con, msg); |
3101 | con->in_base_pos = con->in_base_pos - | |
350b1c32 | 3102 | sizeof(struct ceph_msg_header) - |
0d59ab81 YS |
3103 | front_len - |
3104 | middle_len - | |
3105 | data_len - | |
350b1c32 | 3106 | sizeof(struct ceph_msg_footer); |
350b1c32 SW |
3107 | ceph_msg_put(con->in_msg); |
3108 | con->in_msg = NULL; | |
3109 | con->in_tag = CEPH_MSGR_TAG_READY; | |
684be25c | 3110 | con->in_seq++; |
350b1c32 | 3111 | } else { |
8921d114 AE |
3112 | dout("%s %p in_msg %p msg %p no-op\n", |
3113 | __func__, con, con->in_msg, msg); | |
350b1c32 SW |
3114 | } |
3115 | mutex_unlock(&con->mutex); | |
3116 | } | |
3117 | ||
31b8006e SW |
3118 | /* |
3119 | * Queue a keepalive byte to ensure the tcp connection is alive. | |
3120 | */ | |
3121 | void ceph_con_keepalive(struct ceph_connection *con) | |
3122 | { | |
e00de341 | 3123 | dout("con_keepalive %p\n", con); |
00650931 | 3124 | mutex_lock(&con->mutex); |
e00de341 | 3125 | clear_standby(con); |
00650931 | 3126 | mutex_unlock(&con->mutex); |
c9ffc77a AE |
3127 | if (con_flag_test_and_set(con, CON_FLAG_KEEPALIVE_PENDING) == 0 && |
3128 | con_flag_test_and_set(con, CON_FLAG_WRITE_PENDING) == 0) | |
31b8006e SW |
3129 | queue_con(con); |
3130 | } | |
3d14c5d2 | 3131 | EXPORT_SYMBOL(ceph_con_keepalive); |
31b8006e | 3132 | |
8b9558aa YZ |
3133 | bool ceph_con_keepalive_expired(struct ceph_connection *con, |
3134 | unsigned long interval) | |
3135 | { | |
3136 | if (interval > 0 && | |
3137 | (con->peer_features & CEPH_FEATURE_MSGR_KEEPALIVE2)) { | |
3138 | struct timespec now = CURRENT_TIME; | |
3139 | struct timespec ts; | |
3140 | jiffies_to_timespec(interval, &ts); | |
3141 | ts = timespec_add(con->last_keepalive_ack, ts); | |
3142 | return timespec_compare(&now, &ts) >= 0; | |
3143 | } | |
3144 | return false; | |
3145 | } | |
3146 | ||
6644ed7b | 3147 | static struct ceph_msg_data *ceph_msg_data_create(enum ceph_msg_data_type type) |
43794509 | 3148 | { |
6644ed7b AE |
3149 | struct ceph_msg_data *data; |
3150 | ||
3151 | if (WARN_ON(!ceph_msg_data_type_valid(type))) | |
3152 | return NULL; | |
3153 | ||
81b36be4 | 3154 | data = kmem_cache_zalloc(ceph_msg_data_cache, GFP_NOFS); |
6644ed7b AE |
3155 | if (data) |
3156 | data->type = type; | |
5240d9f9 | 3157 | INIT_LIST_HEAD(&data->links); |
6644ed7b AE |
3158 | |
3159 | return data; | |
3160 | } | |
3161 | ||
3162 | static void ceph_msg_data_destroy(struct ceph_msg_data *data) | |
3163 | { | |
3164 | if (!data) | |
3165 | return; | |
3166 | ||
5240d9f9 | 3167 | WARN_ON(!list_empty(&data->links)); |
e4339d28 | 3168 | if (data->type == CEPH_MSG_DATA_PAGELIST) |
6644ed7b | 3169 | ceph_pagelist_release(data->pagelist); |
81b36be4 | 3170 | kmem_cache_free(ceph_msg_data_cache, data); |
43794509 AE |
3171 | } |
3172 | ||
90af3602 | 3173 | void ceph_msg_data_add_pages(struct ceph_msg *msg, struct page **pages, |
f1baeb2b | 3174 | size_t length, size_t alignment) |
02afca6c | 3175 | { |
6644ed7b AE |
3176 | struct ceph_msg_data *data; |
3177 | ||
07aa1558 AE |
3178 | BUG_ON(!pages); |
3179 | BUG_ON(!length); | |
6644ed7b AE |
3180 | |
3181 | data = ceph_msg_data_create(CEPH_MSG_DATA_PAGES); | |
3182 | BUG_ON(!data); | |
3183 | data->pages = pages; | |
3184 | data->length = length; | |
3185 | data->alignment = alignment & ~PAGE_MASK; | |
02afca6c | 3186 | |
5240d9f9 AE |
3187 | list_add_tail(&data->links, &msg->data); |
3188 | msg->data_length += length; | |
02afca6c | 3189 | } |
90af3602 | 3190 | EXPORT_SYMBOL(ceph_msg_data_add_pages); |
31b8006e | 3191 | |
90af3602 | 3192 | void ceph_msg_data_add_pagelist(struct ceph_msg *msg, |
27fa8385 AE |
3193 | struct ceph_pagelist *pagelist) |
3194 | { | |
6644ed7b AE |
3195 | struct ceph_msg_data *data; |
3196 | ||
07aa1558 AE |
3197 | BUG_ON(!pagelist); |
3198 | BUG_ON(!pagelist->length); | |
27fa8385 | 3199 | |
6644ed7b AE |
3200 | data = ceph_msg_data_create(CEPH_MSG_DATA_PAGELIST); |
3201 | BUG_ON(!data); | |
3202 | data->pagelist = pagelist; | |
3203 | ||
5240d9f9 AE |
3204 | list_add_tail(&data->links, &msg->data); |
3205 | msg->data_length += pagelist->length; | |
27fa8385 | 3206 | } |
90af3602 | 3207 | EXPORT_SYMBOL(ceph_msg_data_add_pagelist); |
27fa8385 | 3208 | |
ea96571f | 3209 | #ifdef CONFIG_BLOCK |
90af3602 | 3210 | void ceph_msg_data_add_bio(struct ceph_msg *msg, struct bio *bio, |
a1930804 | 3211 | size_t length) |
27fa8385 | 3212 | { |
6644ed7b AE |
3213 | struct ceph_msg_data *data; |
3214 | ||
07aa1558 | 3215 | BUG_ON(!bio); |
27fa8385 | 3216 | |
6644ed7b AE |
3217 | data = ceph_msg_data_create(CEPH_MSG_DATA_BIO); |
3218 | BUG_ON(!data); | |
3219 | data->bio = bio; | |
c851c495 | 3220 | data->bio_length = length; |
6644ed7b | 3221 | |
5240d9f9 AE |
3222 | list_add_tail(&data->links, &msg->data); |
3223 | msg->data_length += length; | |
27fa8385 | 3224 | } |
90af3602 | 3225 | EXPORT_SYMBOL(ceph_msg_data_add_bio); |
ea96571f | 3226 | #endif /* CONFIG_BLOCK */ |
27fa8385 | 3227 | |
31b8006e SW |
3228 | /* |
3229 | * construct a new message with given type, size | |
3230 | * the new msg has a ref count of 1. | |
3231 | */ | |
b61c2763 SW |
3232 | struct ceph_msg *ceph_msg_new(int type, int front_len, gfp_t flags, |
3233 | bool can_fail) | |
31b8006e SW |
3234 | { |
3235 | struct ceph_msg *m; | |
3236 | ||
e3d5d638 | 3237 | m = kmem_cache_zalloc(ceph_msg_cache, flags); |
31b8006e SW |
3238 | if (m == NULL) |
3239 | goto out; | |
31b8006e SW |
3240 | |
3241 | m->hdr.type = cpu_to_le16(type); | |
45c6ceb5 | 3242 | m->hdr.priority = cpu_to_le16(CEPH_MSG_PRIO_DEFAULT); |
31b8006e | 3243 | m->hdr.front_len = cpu_to_le32(front_len); |
ca20892d | 3244 | |
9516e45b AE |
3245 | INIT_LIST_HEAD(&m->list_head); |
3246 | kref_init(&m->kref); | |
5240d9f9 | 3247 | INIT_LIST_HEAD(&m->data); |
ca20892d | 3248 | |
31b8006e SW |
3249 | /* front */ |
3250 | if (front_len) { | |
eeb0bed5 | 3251 | m->front.iov_base = ceph_kvmalloc(front_len, flags); |
31b8006e | 3252 | if (m->front.iov_base == NULL) { |
b61c2763 | 3253 | dout("ceph_msg_new can't allocate %d bytes\n", |
31b8006e SW |
3254 | front_len); |
3255 | goto out2; | |
3256 | } | |
3257 | } else { | |
3258 | m->front.iov_base = NULL; | |
3259 | } | |
f2be82b0 | 3260 | m->front_alloc_len = m->front.iov_len = front_len; |
31b8006e | 3261 | |
bb257664 | 3262 | dout("ceph_msg_new %p front %d\n", m, front_len); |
31b8006e SW |
3263 | return m; |
3264 | ||
3265 | out2: | |
3266 | ceph_msg_put(m); | |
3267 | out: | |
b61c2763 SW |
3268 | if (!can_fail) { |
3269 | pr_err("msg_new can't create type %d front %d\n", type, | |
3270 | front_len); | |
f0ed1b7c | 3271 | WARN_ON(1); |
b61c2763 SW |
3272 | } else { |
3273 | dout("msg_new can't create type %d front %d\n", type, | |
3274 | front_len); | |
3275 | } | |
a79832f2 | 3276 | return NULL; |
31b8006e | 3277 | } |
3d14c5d2 | 3278 | EXPORT_SYMBOL(ceph_msg_new); |
31b8006e | 3279 | |
31b8006e SW |
3280 | /* |
3281 | * Allocate "middle" portion of a message, if it is needed and wasn't | |
3282 | * allocated by alloc_msg. This allows us to read a small fixed-size | |
3283 | * per-type header in the front and then gracefully fail (i.e., | |
3284 | * propagate the error to the caller based on info in the front) when | |
3285 | * the middle is too large. | |
3286 | */ | |
2450418c | 3287 | static int ceph_alloc_middle(struct ceph_connection *con, struct ceph_msg *msg) |
31b8006e SW |
3288 | { |
3289 | int type = le16_to_cpu(msg->hdr.type); | |
3290 | int middle_len = le32_to_cpu(msg->hdr.middle_len); | |
3291 | ||
3292 | dout("alloc_middle %p type %d %s middle_len %d\n", msg, type, | |
3293 | ceph_msg_type_name(type), middle_len); | |
3294 | BUG_ON(!middle_len); | |
3295 | BUG_ON(msg->middle); | |
3296 | ||
b6c1d5b8 | 3297 | msg->middle = ceph_buffer_new(middle_len, GFP_NOFS); |
31b8006e SW |
3298 | if (!msg->middle) |
3299 | return -ENOMEM; | |
3300 | return 0; | |
3301 | } | |
3302 | ||
2450418c | 3303 | /* |
1c20f2d2 AE |
3304 | * Allocate a message for receiving an incoming message on a |
3305 | * connection, and save the result in con->in_msg. Uses the | |
3306 | * connection's private alloc_msg op if available. | |
3307 | * | |
4740a623 SW |
3308 | * Returns 0 on success, or a negative error code. |
3309 | * | |
3310 | * On success, if we set *skip = 1: | |
3311 | * - the next message should be skipped and ignored. | |
3312 | * - con->in_msg == NULL | |
3313 | * or if we set *skip = 0: | |
3314 | * - con->in_msg is non-null. | |
3315 | * On error (ENOMEM, EAGAIN, ...), | |
3316 | * - con->in_msg == NULL | |
2450418c | 3317 | */ |
4740a623 | 3318 | static int ceph_con_in_msg_alloc(struct ceph_connection *con, int *skip) |
2450418c | 3319 | { |
4740a623 | 3320 | struct ceph_msg_header *hdr = &con->in_hdr; |
2450418c | 3321 | int middle_len = le32_to_cpu(hdr->middle_len); |
1d866d1c | 3322 | struct ceph_msg *msg; |
4740a623 | 3323 | int ret = 0; |
2450418c | 3324 | |
1c20f2d2 | 3325 | BUG_ON(con->in_msg != NULL); |
53ded495 | 3326 | BUG_ON(!con->ops->alloc_msg); |
2450418c | 3327 | |
53ded495 AE |
3328 | mutex_unlock(&con->mutex); |
3329 | msg = con->ops->alloc_msg(con, hdr, skip); | |
3330 | mutex_lock(&con->mutex); | |
3331 | if (con->state != CON_STATE_OPEN) { | |
3332 | if (msg) | |
1d866d1c | 3333 | ceph_msg_put(msg); |
53ded495 AE |
3334 | return -EAGAIN; |
3335 | } | |
4137577a AE |
3336 | if (msg) { |
3337 | BUG_ON(*skip); | |
3338 | con->in_msg = msg; | |
36eb71aa | 3339 | con->in_msg->con = con->ops->get(con); |
92ce034b | 3340 | BUG_ON(con->in_msg->con == NULL); |
4137577a AE |
3341 | } else { |
3342 | /* | |
3343 | * Null message pointer means either we should skip | |
3344 | * this message or we couldn't allocate memory. The | |
3345 | * former is not an error. | |
3346 | */ | |
3347 | if (*skip) | |
3348 | return 0; | |
4137577a | 3349 | |
67c64eb7 | 3350 | con->error_msg = "error allocating memory for incoming message"; |
53ded495 | 3351 | return -ENOMEM; |
2450418c | 3352 | } |
1c20f2d2 | 3353 | memcpy(&con->in_msg->hdr, &con->in_hdr, sizeof(con->in_hdr)); |
2450418c | 3354 | |
1c20f2d2 AE |
3355 | if (middle_len && !con->in_msg->middle) { |
3356 | ret = ceph_alloc_middle(con, con->in_msg); | |
2450418c | 3357 | if (ret < 0) { |
1c20f2d2 AE |
3358 | ceph_msg_put(con->in_msg); |
3359 | con->in_msg = NULL; | |
2450418c YS |
3360 | } |
3361 | } | |
9d7f0f13 | 3362 | |
4740a623 | 3363 | return ret; |
2450418c YS |
3364 | } |
3365 | ||
31b8006e SW |
3366 | |
3367 | /* | |
3368 | * Free a generically kmalloc'd message. | |
3369 | */ | |
0215e44b | 3370 | static void ceph_msg_free(struct ceph_msg *m) |
31b8006e | 3371 | { |
0215e44b | 3372 | dout("%s %p\n", __func__, m); |
4965fc38 | 3373 | kvfree(m->front.iov_base); |
e3d5d638 | 3374 | kmem_cache_free(ceph_msg_cache, m); |
31b8006e SW |
3375 | } |
3376 | ||
0215e44b | 3377 | static void ceph_msg_release(struct kref *kref) |
c2e552e7 SW |
3378 | { |
3379 | struct ceph_msg *m = container_of(kref, struct ceph_msg, kref); | |
5240d9f9 AE |
3380 | LIST_HEAD(data); |
3381 | struct list_head *links; | |
3382 | struct list_head *next; | |
31b8006e | 3383 | |
0215e44b | 3384 | dout("%s %p\n", __func__, m); |
c2e552e7 SW |
3385 | WARN_ON(!list_empty(&m->list_head)); |
3386 | ||
3387 | /* drop middle, data, if any */ | |
3388 | if (m->middle) { | |
3389 | ceph_buffer_put(m->middle); | |
3390 | m->middle = NULL; | |
31b8006e | 3391 | } |
5240d9f9 AE |
3392 | |
3393 | list_splice_init(&m->data, &data); | |
3394 | list_for_each_safe(links, next, &data) { | |
3395 | struct ceph_msg_data *data; | |
3396 | ||
3397 | data = list_entry(links, struct ceph_msg_data, links); | |
3398 | list_del_init(links); | |
3399 | ceph_msg_data_destroy(data); | |
3400 | } | |
a1930804 | 3401 | m->data_length = 0; |
58bb3b37 | 3402 | |
c2e552e7 SW |
3403 | if (m->pool) |
3404 | ceph_msgpool_put(m->pool, m); | |
3405 | else | |
0215e44b ID |
3406 | ceph_msg_free(m); |
3407 | } | |
3408 | ||
3409 | struct ceph_msg *ceph_msg_get(struct ceph_msg *msg) | |
3410 | { | |
3411 | dout("%s %p (was %d)\n", __func__, msg, | |
3412 | atomic_read(&msg->kref.refcount)); | |
3413 | kref_get(&msg->kref); | |
3414 | return msg; | |
3415 | } | |
3416 | EXPORT_SYMBOL(ceph_msg_get); | |
3417 | ||
3418 | void ceph_msg_put(struct ceph_msg *msg) | |
3419 | { | |
3420 | dout("%s %p (was %d)\n", __func__, msg, | |
3421 | atomic_read(&msg->kref.refcount)); | |
3422 | kref_put(&msg->kref, ceph_msg_release); | |
31b8006e | 3423 | } |
0215e44b | 3424 | EXPORT_SYMBOL(ceph_msg_put); |
9ec7cab1 SW |
3425 | |
3426 | void ceph_msg_dump(struct ceph_msg *msg) | |
3427 | { | |
3cea4c30 ID |
3428 | pr_debug("msg_dump %p (front_alloc_len %d length %zd)\n", msg, |
3429 | msg->front_alloc_len, msg->data_length); | |
9ec7cab1 SW |
3430 | print_hex_dump(KERN_DEBUG, "header: ", |
3431 | DUMP_PREFIX_OFFSET, 16, 1, | |
3432 | &msg->hdr, sizeof(msg->hdr), true); | |
3433 | print_hex_dump(KERN_DEBUG, " front: ", | |
3434 | DUMP_PREFIX_OFFSET, 16, 1, | |
3435 | msg->front.iov_base, msg->front.iov_len, true); | |
3436 | if (msg->middle) | |
3437 | print_hex_dump(KERN_DEBUG, "middle: ", | |
3438 | DUMP_PREFIX_OFFSET, 16, 1, | |
3439 | msg->middle->vec.iov_base, | |
3440 | msg->middle->vec.iov_len, true); | |
3441 | print_hex_dump(KERN_DEBUG, "footer: ", | |
3442 | DUMP_PREFIX_OFFSET, 16, 1, | |
3443 | &msg->footer, sizeof(msg->footer), true); | |
3444 | } | |
3d14c5d2 | 3445 | EXPORT_SYMBOL(ceph_msg_dump); |