Commit | Line | Data |
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3d14c5d2 | 1 | #include <linux/ceph/ceph_debug.h> |
31b8006e SW |
2 | |
3 | #include <linux/crc32c.h> | |
4 | #include <linux/ctype.h> | |
5 | #include <linux/highmem.h> | |
6 | #include <linux/inet.h> | |
7 | #include <linux/kthread.h> | |
8 | #include <linux/net.h> | |
5a0e3ad6 | 9 | #include <linux/slab.h> |
31b8006e SW |
10 | #include <linux/socket.h> |
11 | #include <linux/string.h> | |
3ebc21f7 | 12 | #ifdef CONFIG_BLOCK |
68b4476b | 13 | #include <linux/bio.h> |
3ebc21f7 | 14 | #endif /* CONFIG_BLOCK */ |
ee3b56f2 | 15 | #include <linux/dns_resolver.h> |
31b8006e SW |
16 | #include <net/tcp.h> |
17 | ||
2b3e0c90 | 18 | #include <linux/ceph/ceph_features.h> |
3d14c5d2 YS |
19 | #include <linux/ceph/libceph.h> |
20 | #include <linux/ceph/messenger.h> | |
21 | #include <linux/ceph/decode.h> | |
22 | #include <linux/ceph/pagelist.h> | |
bc3b2d7f | 23 | #include <linux/export.h> |
31b8006e | 24 | |
fe38a2b6 AE |
25 | #define list_entry_next(pos, member) \ |
26 | list_entry(pos->member.next, typeof(*pos), member) | |
27 | ||
31b8006e SW |
28 | /* |
29 | * Ceph uses the messenger to exchange ceph_msg messages with other | |
30 | * hosts in the system. The messenger provides ordered and reliable | |
31 | * delivery. We tolerate TCP disconnects by reconnecting (with | |
32 | * exponential backoff) in the case of a fault (disconnection, bad | |
33 | * crc, protocol error). Acks allow sent messages to be discarded by | |
34 | * the sender. | |
35 | */ | |
36 | ||
bc18f4b1 AE |
37 | /* |
38 | * We track the state of the socket on a given connection using | |
39 | * values defined below. The transition to a new socket state is | |
40 | * handled by a function which verifies we aren't coming from an | |
41 | * unexpected state. | |
42 | * | |
43 | * -------- | |
44 | * | NEW* | transient initial state | |
45 | * -------- | |
46 | * | con_sock_state_init() | |
47 | * v | |
48 | * ---------- | |
49 | * | CLOSED | initialized, but no socket (and no | |
50 | * ---------- TCP connection) | |
51 | * ^ \ | |
52 | * | \ con_sock_state_connecting() | |
53 | * | ---------------------- | |
54 | * | \ | |
55 | * + con_sock_state_closed() \ | |
fbb85a47 SW |
56 | * |+--------------------------- \ |
57 | * | \ \ \ | |
58 | * | ----------- \ \ | |
59 | * | | CLOSING | socket event; \ \ | |
60 | * | ----------- await close \ \ | |
61 | * | ^ \ | | |
62 | * | | \ | | |
63 | * | + con_sock_state_closing() \ | | |
64 | * | / \ | | | |
65 | * | / --------------- | | | |
66 | * | / \ v v | |
bc18f4b1 AE |
67 | * | / -------------- |
68 | * | / -----------------| CONNECTING | socket created, TCP | |
69 | * | | / -------------- connect initiated | |
70 | * | | | con_sock_state_connected() | |
71 | * | | v | |
72 | * ------------- | |
73 | * | CONNECTED | TCP connection established | |
74 | * ------------- | |
75 | * | |
76 | * State values for ceph_connection->sock_state; NEW is assumed to be 0. | |
77 | */ | |
ce2c8903 AE |
78 | |
79 | #define CON_SOCK_STATE_NEW 0 /* -> CLOSED */ | |
80 | #define CON_SOCK_STATE_CLOSED 1 /* -> CONNECTING */ | |
81 | #define CON_SOCK_STATE_CONNECTING 2 /* -> CONNECTED or -> CLOSING */ | |
82 | #define CON_SOCK_STATE_CONNECTED 3 /* -> CLOSING or -> CLOSED */ | |
83 | #define CON_SOCK_STATE_CLOSING 4 /* -> CLOSED */ | |
84 | ||
8dacc7da SW |
85 | /* |
86 | * connection states | |
87 | */ | |
88 | #define CON_STATE_CLOSED 1 /* -> PREOPEN */ | |
89 | #define CON_STATE_PREOPEN 2 /* -> CONNECTING, CLOSED */ | |
90 | #define CON_STATE_CONNECTING 3 /* -> NEGOTIATING, CLOSED */ | |
91 | #define CON_STATE_NEGOTIATING 4 /* -> OPEN, CLOSED */ | |
92 | #define CON_STATE_OPEN 5 /* -> STANDBY, CLOSED */ | |
93 | #define CON_STATE_STANDBY 6 /* -> PREOPEN, CLOSED */ | |
94 | ||
4a861692 SW |
95 | /* |
96 | * ceph_connection flag bits | |
97 | */ | |
98 | #define CON_FLAG_LOSSYTX 0 /* we can close channel or drop | |
99 | * messages on errors */ | |
100 | #define CON_FLAG_KEEPALIVE_PENDING 1 /* we need to send a keepalive */ | |
101 | #define CON_FLAG_WRITE_PENDING 2 /* we have data ready to send */ | |
102 | #define CON_FLAG_SOCK_CLOSED 3 /* socket state changed to closed */ | |
103 | #define CON_FLAG_BACKOFF 4 /* need to retry queuing delayed work */ | |
8dacc7da | 104 | |
c9ffc77a AE |
105 | static bool con_flag_valid(unsigned long con_flag) |
106 | { | |
107 | switch (con_flag) { | |
108 | case CON_FLAG_LOSSYTX: | |
109 | case CON_FLAG_KEEPALIVE_PENDING: | |
110 | case CON_FLAG_WRITE_PENDING: | |
111 | case CON_FLAG_SOCK_CLOSED: | |
112 | case CON_FLAG_BACKOFF: | |
113 | return true; | |
114 | default: | |
115 | return false; | |
116 | } | |
117 | } | |
118 | ||
119 | static void con_flag_clear(struct ceph_connection *con, unsigned long con_flag) | |
120 | { | |
121 | BUG_ON(!con_flag_valid(con_flag)); | |
122 | ||
123 | clear_bit(con_flag, &con->flags); | |
124 | } | |
125 | ||
126 | static void con_flag_set(struct ceph_connection *con, unsigned long con_flag) | |
127 | { | |
128 | BUG_ON(!con_flag_valid(con_flag)); | |
129 | ||
130 | set_bit(con_flag, &con->flags); | |
131 | } | |
132 | ||
133 | static bool con_flag_test(struct ceph_connection *con, unsigned long con_flag) | |
134 | { | |
135 | BUG_ON(!con_flag_valid(con_flag)); | |
136 | ||
137 | return test_bit(con_flag, &con->flags); | |
138 | } | |
139 | ||
140 | static bool con_flag_test_and_clear(struct ceph_connection *con, | |
141 | unsigned long con_flag) | |
142 | { | |
143 | BUG_ON(!con_flag_valid(con_flag)); | |
144 | ||
145 | return test_and_clear_bit(con_flag, &con->flags); | |
146 | } | |
147 | ||
148 | static bool con_flag_test_and_set(struct ceph_connection *con, | |
149 | unsigned long con_flag) | |
150 | { | |
151 | BUG_ON(!con_flag_valid(con_flag)); | |
152 | ||
153 | return test_and_set_bit(con_flag, &con->flags); | |
154 | } | |
155 | ||
e3d5d638 AE |
156 | /* Slab caches for frequently-allocated structures */ |
157 | ||
158 | static struct kmem_cache *ceph_msg_cache; | |
81b36be4 | 159 | static struct kmem_cache *ceph_msg_data_cache; |
e3d5d638 | 160 | |
31b8006e SW |
161 | /* static tag bytes (protocol control messages) */ |
162 | static char tag_msg = CEPH_MSGR_TAG_MSG; | |
163 | static char tag_ack = CEPH_MSGR_TAG_ACK; | |
164 | static char tag_keepalive = CEPH_MSGR_TAG_KEEPALIVE; | |
165 | ||
a6a5349d SW |
166 | #ifdef CONFIG_LOCKDEP |
167 | static struct lock_class_key socket_class; | |
168 | #endif | |
169 | ||
84495f49 AE |
170 | /* |
171 | * When skipping (ignoring) a block of input we read it into a "skip | |
172 | * buffer," which is this many bytes in size. | |
173 | */ | |
174 | #define SKIP_BUF_SIZE 1024 | |
31b8006e SW |
175 | |
176 | static void queue_con(struct ceph_connection *con); | |
37ab77ac | 177 | static void cancel_con(struct ceph_connection *con); |
31b8006e | 178 | static void con_work(struct work_struct *); |
93209264 | 179 | static void con_fault(struct ceph_connection *con); |
31b8006e | 180 | |
31b8006e | 181 | /* |
f64a9317 AE |
182 | * Nicely render a sockaddr as a string. An array of formatted |
183 | * strings is used, to approximate reentrancy. | |
31b8006e | 184 | */ |
f64a9317 AE |
185 | #define ADDR_STR_COUNT_LOG 5 /* log2(# address strings in array) */ |
186 | #define ADDR_STR_COUNT (1 << ADDR_STR_COUNT_LOG) | |
187 | #define ADDR_STR_COUNT_MASK (ADDR_STR_COUNT - 1) | |
188 | #define MAX_ADDR_STR_LEN 64 /* 54 is enough */ | |
189 | ||
190 | static char addr_str[ADDR_STR_COUNT][MAX_ADDR_STR_LEN]; | |
191 | static atomic_t addr_str_seq = ATOMIC_INIT(0); | |
31b8006e | 192 | |
57666519 | 193 | static struct page *zero_page; /* used in certain error cases */ |
57666519 | 194 | |
3d14c5d2 | 195 | const char *ceph_pr_addr(const struct sockaddr_storage *ss) |
31b8006e SW |
196 | { |
197 | int i; | |
198 | char *s; | |
99f0f3b2 AE |
199 | struct sockaddr_in *in4 = (struct sockaddr_in *) ss; |
200 | struct sockaddr_in6 *in6 = (struct sockaddr_in6 *) ss; | |
31b8006e | 201 | |
f64a9317 | 202 | i = atomic_inc_return(&addr_str_seq) & ADDR_STR_COUNT_MASK; |
31b8006e SW |
203 | s = addr_str[i]; |
204 | ||
205 | switch (ss->ss_family) { | |
206 | case AF_INET: | |
bd406145 AE |
207 | snprintf(s, MAX_ADDR_STR_LEN, "%pI4:%hu", &in4->sin_addr, |
208 | ntohs(in4->sin_port)); | |
31b8006e SW |
209 | break; |
210 | ||
211 | case AF_INET6: | |
bd406145 AE |
212 | snprintf(s, MAX_ADDR_STR_LEN, "[%pI6c]:%hu", &in6->sin6_addr, |
213 | ntohs(in6->sin6_port)); | |
31b8006e SW |
214 | break; |
215 | ||
216 | default: | |
d3002b97 AE |
217 | snprintf(s, MAX_ADDR_STR_LEN, "(unknown sockaddr family %hu)", |
218 | ss->ss_family); | |
31b8006e SW |
219 | } |
220 | ||
221 | return s; | |
222 | } | |
3d14c5d2 | 223 | EXPORT_SYMBOL(ceph_pr_addr); |
31b8006e | 224 | |
63f2d211 SW |
225 | static void encode_my_addr(struct ceph_messenger *msgr) |
226 | { | |
227 | memcpy(&msgr->my_enc_addr, &msgr->inst.addr, sizeof(msgr->my_enc_addr)); | |
228 | ceph_encode_addr(&msgr->my_enc_addr); | |
229 | } | |
230 | ||
31b8006e SW |
231 | /* |
232 | * work queue for all reading and writing to/from the socket. | |
233 | */ | |
e0f43c94 | 234 | static struct workqueue_struct *ceph_msgr_wq; |
31b8006e | 235 | |
e3d5d638 AE |
236 | static int ceph_msgr_slab_init(void) |
237 | { | |
238 | BUG_ON(ceph_msg_cache); | |
239 | ceph_msg_cache = kmem_cache_create("ceph_msg", | |
240 | sizeof (struct ceph_msg), | |
241 | __alignof__(struct ceph_msg), 0, NULL); | |
81b36be4 AE |
242 | |
243 | if (!ceph_msg_cache) | |
244 | return -ENOMEM; | |
245 | ||
246 | BUG_ON(ceph_msg_data_cache); | |
247 | ceph_msg_data_cache = kmem_cache_create("ceph_msg_data", | |
248 | sizeof (struct ceph_msg_data), | |
249 | __alignof__(struct ceph_msg_data), | |
250 | 0, NULL); | |
251 | if (ceph_msg_data_cache) | |
252 | return 0; | |
253 | ||
254 | kmem_cache_destroy(ceph_msg_cache); | |
255 | ceph_msg_cache = NULL; | |
256 | ||
257 | return -ENOMEM; | |
e3d5d638 AE |
258 | } |
259 | ||
260 | static void ceph_msgr_slab_exit(void) | |
261 | { | |
81b36be4 AE |
262 | BUG_ON(!ceph_msg_data_cache); |
263 | kmem_cache_destroy(ceph_msg_data_cache); | |
264 | ceph_msg_data_cache = NULL; | |
265 | ||
e3d5d638 AE |
266 | BUG_ON(!ceph_msg_cache); |
267 | kmem_cache_destroy(ceph_msg_cache); | |
268 | ceph_msg_cache = NULL; | |
269 | } | |
270 | ||
15417167 | 271 | static void _ceph_msgr_exit(void) |
6173d1f0 | 272 | { |
d3002b97 | 273 | if (ceph_msgr_wq) { |
6173d1f0 | 274 | destroy_workqueue(ceph_msgr_wq); |
d3002b97 AE |
275 | ceph_msgr_wq = NULL; |
276 | } | |
6173d1f0 | 277 | |
e3d5d638 AE |
278 | ceph_msgr_slab_exit(); |
279 | ||
6173d1f0 | 280 | BUG_ON(zero_page == NULL); |
6173d1f0 AE |
281 | page_cache_release(zero_page); |
282 | zero_page = NULL; | |
283 | } | |
284 | ||
3d14c5d2 | 285 | int ceph_msgr_init(void) |
31b8006e | 286 | { |
57666519 AE |
287 | BUG_ON(zero_page != NULL); |
288 | zero_page = ZERO_PAGE(0); | |
289 | page_cache_get(zero_page); | |
290 | ||
e3d5d638 AE |
291 | if (ceph_msgr_slab_init()) |
292 | return -ENOMEM; | |
293 | ||
f9865f06 ID |
294 | /* |
295 | * The number of active work items is limited by the number of | |
296 | * connections, so leave @max_active at default. | |
297 | */ | |
298 | ceph_msgr_wq = alloc_workqueue("ceph-msgr", WQ_MEM_RECLAIM, 0); | |
6173d1f0 AE |
299 | if (ceph_msgr_wq) |
300 | return 0; | |
57666519 | 301 | |
6173d1f0 AE |
302 | pr_err("msgr_init failed to create workqueue\n"); |
303 | _ceph_msgr_exit(); | |
57666519 | 304 | |
6173d1f0 | 305 | return -ENOMEM; |
31b8006e | 306 | } |
3d14c5d2 | 307 | EXPORT_SYMBOL(ceph_msgr_init); |
31b8006e SW |
308 | |
309 | void ceph_msgr_exit(void) | |
310 | { | |
57666519 | 311 | BUG_ON(ceph_msgr_wq == NULL); |
57666519 | 312 | |
6173d1f0 | 313 | _ceph_msgr_exit(); |
31b8006e | 314 | } |
3d14c5d2 | 315 | EXPORT_SYMBOL(ceph_msgr_exit); |
31b8006e | 316 | |
cd84db6e | 317 | void ceph_msgr_flush(void) |
a922d38f SW |
318 | { |
319 | flush_workqueue(ceph_msgr_wq); | |
320 | } | |
3d14c5d2 | 321 | EXPORT_SYMBOL(ceph_msgr_flush); |
a922d38f | 322 | |
ce2c8903 AE |
323 | /* Connection socket state transition functions */ |
324 | ||
325 | static void con_sock_state_init(struct ceph_connection *con) | |
326 | { | |
327 | int old_state; | |
328 | ||
329 | old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CLOSED); | |
330 | if (WARN_ON(old_state != CON_SOCK_STATE_NEW)) | |
331 | printk("%s: unexpected old state %d\n", __func__, old_state); | |
8007b8d6 SW |
332 | dout("%s con %p sock %d -> %d\n", __func__, con, old_state, |
333 | CON_SOCK_STATE_CLOSED); | |
ce2c8903 AE |
334 | } |
335 | ||
336 | static void con_sock_state_connecting(struct ceph_connection *con) | |
337 | { | |
338 | int old_state; | |
339 | ||
340 | old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CONNECTING); | |
341 | if (WARN_ON(old_state != CON_SOCK_STATE_CLOSED)) | |
342 | printk("%s: unexpected old state %d\n", __func__, old_state); | |
8007b8d6 SW |
343 | dout("%s con %p sock %d -> %d\n", __func__, con, old_state, |
344 | CON_SOCK_STATE_CONNECTING); | |
ce2c8903 AE |
345 | } |
346 | ||
347 | static void con_sock_state_connected(struct ceph_connection *con) | |
348 | { | |
349 | int old_state; | |
350 | ||
351 | old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CONNECTED); | |
352 | if (WARN_ON(old_state != CON_SOCK_STATE_CONNECTING)) | |
353 | printk("%s: unexpected old state %d\n", __func__, old_state); | |
8007b8d6 SW |
354 | dout("%s con %p sock %d -> %d\n", __func__, con, old_state, |
355 | CON_SOCK_STATE_CONNECTED); | |
ce2c8903 AE |
356 | } |
357 | ||
358 | static void con_sock_state_closing(struct ceph_connection *con) | |
359 | { | |
360 | int old_state; | |
361 | ||
362 | old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CLOSING); | |
363 | if (WARN_ON(old_state != CON_SOCK_STATE_CONNECTING && | |
364 | old_state != CON_SOCK_STATE_CONNECTED && | |
365 | old_state != CON_SOCK_STATE_CLOSING)) | |
366 | printk("%s: unexpected old state %d\n", __func__, old_state); | |
8007b8d6 SW |
367 | dout("%s con %p sock %d -> %d\n", __func__, con, old_state, |
368 | CON_SOCK_STATE_CLOSING); | |
ce2c8903 AE |
369 | } |
370 | ||
371 | static void con_sock_state_closed(struct ceph_connection *con) | |
372 | { | |
373 | int old_state; | |
374 | ||
375 | old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CLOSED); | |
376 | if (WARN_ON(old_state != CON_SOCK_STATE_CONNECTED && | |
fbb85a47 | 377 | old_state != CON_SOCK_STATE_CLOSING && |
8007b8d6 SW |
378 | old_state != CON_SOCK_STATE_CONNECTING && |
379 | old_state != CON_SOCK_STATE_CLOSED)) | |
ce2c8903 | 380 | printk("%s: unexpected old state %d\n", __func__, old_state); |
8007b8d6 SW |
381 | dout("%s con %p sock %d -> %d\n", __func__, con, old_state, |
382 | CON_SOCK_STATE_CLOSED); | |
ce2c8903 | 383 | } |
a922d38f | 384 | |
31b8006e SW |
385 | /* |
386 | * socket callback functions | |
387 | */ | |
388 | ||
389 | /* data available on socket, or listen socket received a connect */ | |
676d2369 | 390 | static void ceph_sock_data_ready(struct sock *sk) |
31b8006e | 391 | { |
bd406145 | 392 | struct ceph_connection *con = sk->sk_user_data; |
a2a32584 GH |
393 | if (atomic_read(&con->msgr->stopping)) { |
394 | return; | |
395 | } | |
bd406145 | 396 | |
31b8006e | 397 | if (sk->sk_state != TCP_CLOSE_WAIT) { |
327800bd | 398 | dout("%s on %p state = %lu, queueing work\n", __func__, |
31b8006e SW |
399 | con, con->state); |
400 | queue_con(con); | |
401 | } | |
402 | } | |
403 | ||
404 | /* socket has buffer space for writing */ | |
327800bd | 405 | static void ceph_sock_write_space(struct sock *sk) |
31b8006e | 406 | { |
d3002b97 | 407 | struct ceph_connection *con = sk->sk_user_data; |
31b8006e | 408 | |
182fac26 JS |
409 | /* only queue to workqueue if there is data we want to write, |
410 | * and there is sufficient space in the socket buffer to accept | |
327800bd | 411 | * more data. clear SOCK_NOSPACE so that ceph_sock_write_space() |
182fac26 JS |
412 | * doesn't get called again until try_write() fills the socket |
413 | * buffer. See net/ipv4/tcp_input.c:tcp_check_space() | |
414 | * and net/core/stream.c:sk_stream_write_space(). | |
415 | */ | |
c9ffc77a | 416 | if (con_flag_test(con, CON_FLAG_WRITE_PENDING)) { |
64dc6130 | 417 | if (sk_stream_is_writeable(sk)) { |
327800bd | 418 | dout("%s %p queueing write work\n", __func__, con); |
182fac26 JS |
419 | clear_bit(SOCK_NOSPACE, &sk->sk_socket->flags); |
420 | queue_con(con); | |
421 | } | |
31b8006e | 422 | } else { |
327800bd | 423 | dout("%s %p nothing to write\n", __func__, con); |
31b8006e | 424 | } |
31b8006e SW |
425 | } |
426 | ||
427 | /* socket's state has changed */ | |
327800bd | 428 | static void ceph_sock_state_change(struct sock *sk) |
31b8006e | 429 | { |
bd406145 | 430 | struct ceph_connection *con = sk->sk_user_data; |
31b8006e | 431 | |
327800bd | 432 | dout("%s %p state = %lu sk_state = %u\n", __func__, |
31b8006e SW |
433 | con, con->state, sk->sk_state); |
434 | ||
31b8006e SW |
435 | switch (sk->sk_state) { |
436 | case TCP_CLOSE: | |
327800bd | 437 | dout("%s TCP_CLOSE\n", __func__); |
31b8006e | 438 | case TCP_CLOSE_WAIT: |
327800bd | 439 | dout("%s TCP_CLOSE_WAIT\n", __func__); |
ce2c8903 | 440 | con_sock_state_closing(con); |
c9ffc77a | 441 | con_flag_set(con, CON_FLAG_SOCK_CLOSED); |
d65c9e0b | 442 | queue_con(con); |
31b8006e SW |
443 | break; |
444 | case TCP_ESTABLISHED: | |
327800bd | 445 | dout("%s TCP_ESTABLISHED\n", __func__); |
ce2c8903 | 446 | con_sock_state_connected(con); |
31b8006e SW |
447 | queue_con(con); |
448 | break; | |
d3002b97 AE |
449 | default: /* Everything else is uninteresting */ |
450 | break; | |
31b8006e SW |
451 | } |
452 | } | |
453 | ||
454 | /* | |
455 | * set up socket callbacks | |
456 | */ | |
457 | static void set_sock_callbacks(struct socket *sock, | |
458 | struct ceph_connection *con) | |
459 | { | |
460 | struct sock *sk = sock->sk; | |
bd406145 | 461 | sk->sk_user_data = con; |
327800bd AE |
462 | sk->sk_data_ready = ceph_sock_data_ready; |
463 | sk->sk_write_space = ceph_sock_write_space; | |
464 | sk->sk_state_change = ceph_sock_state_change; | |
31b8006e SW |
465 | } |
466 | ||
467 | ||
468 | /* | |
469 | * socket helpers | |
470 | */ | |
471 | ||
472 | /* | |
473 | * initiate connection to a remote socket. | |
474 | */ | |
41617d0c | 475 | static int ceph_tcp_connect(struct ceph_connection *con) |
31b8006e | 476 | { |
f91d3471 | 477 | struct sockaddr_storage *paddr = &con->peer_addr.in_addr; |
31b8006e SW |
478 | struct socket *sock; |
479 | int ret; | |
480 | ||
481 | BUG_ON(con->sock); | |
f91d3471 SW |
482 | ret = sock_create_kern(con->peer_addr.in_addr.ss_family, SOCK_STREAM, |
483 | IPPROTO_TCP, &sock); | |
31b8006e | 484 | if (ret) |
41617d0c | 485 | return ret; |
6d7fdb0a | 486 | sock->sk->sk_allocation = GFP_NOFS; |
31b8006e | 487 | |
a6a5349d SW |
488 | #ifdef CONFIG_LOCKDEP |
489 | lockdep_set_class(&sock->sk->sk_lock, &socket_class); | |
490 | #endif | |
491 | ||
31b8006e SW |
492 | set_sock_callbacks(sock, con); |
493 | ||
3d14c5d2 | 494 | dout("connect %s\n", ceph_pr_addr(&con->peer_addr.in_addr)); |
31b8006e | 495 | |
89a86be0 | 496 | con_sock_state_connecting(con); |
f91d3471 SW |
497 | ret = sock->ops->connect(sock, (struct sockaddr *)paddr, sizeof(*paddr), |
498 | O_NONBLOCK); | |
31b8006e SW |
499 | if (ret == -EINPROGRESS) { |
500 | dout("connect %s EINPROGRESS sk_state = %u\n", | |
3d14c5d2 | 501 | ceph_pr_addr(&con->peer_addr.in_addr), |
31b8006e | 502 | sock->sk->sk_state); |
a5bc3129 | 503 | } else if (ret < 0) { |
31b8006e | 504 | pr_err("connect %s error %d\n", |
3d14c5d2 | 505 | ceph_pr_addr(&con->peer_addr.in_addr), ret); |
31b8006e | 506 | sock_release(sock); |
41617d0c | 507 | return ret; |
a5bc3129 | 508 | } |
89baaa57 | 509 | |
ba988f87 CH |
510 | if (con->msgr->tcp_nodelay) { |
511 | int optval = 1; | |
512 | ||
513 | ret = kernel_setsockopt(sock, SOL_TCP, TCP_NODELAY, | |
514 | (char *)&optval, sizeof(optval)); | |
515 | if (ret) | |
516 | pr_err("kernel_setsockopt(TCP_NODELAY) failed: %d", | |
517 | ret); | |
518 | } | |
519 | ||
a5bc3129 | 520 | con->sock = sock; |
41617d0c | 521 | return 0; |
31b8006e SW |
522 | } |
523 | ||
524 | static int ceph_tcp_recvmsg(struct socket *sock, void *buf, size_t len) | |
525 | { | |
526 | struct kvec iov = {buf, len}; | |
527 | struct msghdr msg = { .msg_flags = MSG_DONTWAIT | MSG_NOSIGNAL }; | |
98bdb0aa | 528 | int r; |
31b8006e | 529 | |
98bdb0aa SW |
530 | r = kernel_recvmsg(sock, &msg, &iov, 1, len, msg.msg_flags); |
531 | if (r == -EAGAIN) | |
532 | r = 0; | |
533 | return r; | |
31b8006e SW |
534 | } |
535 | ||
afb3d90e AE |
536 | static int ceph_tcp_recvpage(struct socket *sock, struct page *page, |
537 | int page_offset, size_t length) | |
538 | { | |
539 | void *kaddr; | |
540 | int ret; | |
541 | ||
542 | BUG_ON(page_offset + length > PAGE_SIZE); | |
543 | ||
544 | kaddr = kmap(page); | |
545 | BUG_ON(!kaddr); | |
546 | ret = ceph_tcp_recvmsg(sock, kaddr + page_offset, length); | |
547 | kunmap(page); | |
548 | ||
549 | return ret; | |
550 | } | |
551 | ||
31b8006e SW |
552 | /* |
553 | * write something. @more is true if caller will be sending more data | |
554 | * shortly. | |
555 | */ | |
556 | static int ceph_tcp_sendmsg(struct socket *sock, struct kvec *iov, | |
557 | size_t kvlen, size_t len, int more) | |
558 | { | |
559 | struct msghdr msg = { .msg_flags = MSG_DONTWAIT | MSG_NOSIGNAL }; | |
42961d23 | 560 | int r; |
31b8006e SW |
561 | |
562 | if (more) | |
563 | msg.msg_flags |= MSG_MORE; | |
564 | else | |
565 | msg.msg_flags |= MSG_EOR; /* superfluous, but what the hell */ | |
566 | ||
42961d23 SW |
567 | r = kernel_sendmsg(sock, &msg, iov, kvlen, len); |
568 | if (r == -EAGAIN) | |
569 | r = 0; | |
570 | return r; | |
31b8006e SW |
571 | } |
572 | ||
178eda29 | 573 | static int __ceph_tcp_sendpage(struct socket *sock, struct page *page, |
e1dcb128 | 574 | int offset, size_t size, bool more) |
31739139 AE |
575 | { |
576 | int flags = MSG_DONTWAIT | MSG_NOSIGNAL | (more ? MSG_MORE : MSG_EOR); | |
577 | int ret; | |
578 | ||
579 | ret = kernel_sendpage(sock, page, offset, size, flags); | |
580 | if (ret == -EAGAIN) | |
581 | ret = 0; | |
582 | ||
583 | return ret; | |
584 | } | |
585 | ||
178eda29 CC |
586 | static int ceph_tcp_sendpage(struct socket *sock, struct page *page, |
587 | int offset, size_t size, bool more) | |
588 | { | |
589 | int ret; | |
590 | struct kvec iov; | |
591 | ||
592 | /* sendpage cannot properly handle pages with page_count == 0, | |
593 | * we need to fallback to sendmsg if that's the case */ | |
594 | if (page_count(page) >= 1) | |
595 | return __ceph_tcp_sendpage(sock, page, offset, size, more); | |
596 | ||
597 | iov.iov_base = kmap(page) + offset; | |
598 | iov.iov_len = size; | |
599 | ret = ceph_tcp_sendmsg(sock, &iov, 1, size, more); | |
600 | kunmap(page); | |
601 | ||
602 | return ret; | |
603 | } | |
31b8006e SW |
604 | |
605 | /* | |
606 | * Shutdown/close the socket for the given connection. | |
607 | */ | |
608 | static int con_close_socket(struct ceph_connection *con) | |
609 | { | |
8007b8d6 | 610 | int rc = 0; |
31b8006e SW |
611 | |
612 | dout("con_close_socket on %p sock %p\n", con, con->sock); | |
8007b8d6 SW |
613 | if (con->sock) { |
614 | rc = con->sock->ops->shutdown(con->sock, SHUT_RDWR); | |
615 | sock_release(con->sock); | |
616 | con->sock = NULL; | |
617 | } | |
456ea468 AE |
618 | |
619 | /* | |
4a861692 | 620 | * Forcibly clear the SOCK_CLOSED flag. It gets set |
456ea468 AE |
621 | * independent of the connection mutex, and we could have |
622 | * received a socket close event before we had the chance to | |
623 | * shut the socket down. | |
624 | */ | |
c9ffc77a | 625 | con_flag_clear(con, CON_FLAG_SOCK_CLOSED); |
8007b8d6 | 626 | |
ce2c8903 | 627 | con_sock_state_closed(con); |
31b8006e SW |
628 | return rc; |
629 | } | |
630 | ||
631 | /* | |
632 | * Reset a connection. Discard all incoming and outgoing messages | |
633 | * and clear *_seq state. | |
634 | */ | |
635 | static void ceph_msg_remove(struct ceph_msg *msg) | |
636 | { | |
637 | list_del_init(&msg->list_head); | |
38941f80 | 638 | BUG_ON(msg->con == NULL); |
36eb71aa | 639 | msg->con->ops->put(msg->con); |
38941f80 AE |
640 | msg->con = NULL; |
641 | ||
31b8006e SW |
642 | ceph_msg_put(msg); |
643 | } | |
644 | static void ceph_msg_remove_list(struct list_head *head) | |
645 | { | |
646 | while (!list_empty(head)) { | |
647 | struct ceph_msg *msg = list_first_entry(head, struct ceph_msg, | |
648 | list_head); | |
649 | ceph_msg_remove(msg); | |
650 | } | |
651 | } | |
652 | ||
653 | static void reset_connection(struct ceph_connection *con) | |
654 | { | |
655 | /* reset connection, out_queue, msg_ and connect_seq */ | |
656 | /* discard existing out_queue and msg_seq */ | |
0fa6ebc6 | 657 | dout("reset_connection %p\n", con); |
31b8006e SW |
658 | ceph_msg_remove_list(&con->out_queue); |
659 | ceph_msg_remove_list(&con->out_sent); | |
660 | ||
cf3e5c40 | 661 | if (con->in_msg) { |
38941f80 AE |
662 | BUG_ON(con->in_msg->con != con); |
663 | con->in_msg->con = NULL; | |
cf3e5c40 SW |
664 | ceph_msg_put(con->in_msg); |
665 | con->in_msg = NULL; | |
36eb71aa | 666 | con->ops->put(con); |
cf3e5c40 SW |
667 | } |
668 | ||
31b8006e SW |
669 | con->connect_seq = 0; |
670 | con->out_seq = 0; | |
c86a2930 SW |
671 | if (con->out_msg) { |
672 | ceph_msg_put(con->out_msg); | |
673 | con->out_msg = NULL; | |
674 | } | |
31b8006e | 675 | con->in_seq = 0; |
0e0d5e0c | 676 | con->in_seq_acked = 0; |
31b8006e SW |
677 | } |
678 | ||
679 | /* | |
680 | * mark a peer down. drop any open connections. | |
681 | */ | |
682 | void ceph_con_close(struct ceph_connection *con) | |
683 | { | |
8c50c817 | 684 | mutex_lock(&con->mutex); |
3d14c5d2 YS |
685 | dout("con_close %p peer %s\n", con, |
686 | ceph_pr_addr(&con->peer_addr.in_addr)); | |
8dacc7da | 687 | con->state = CON_STATE_CLOSED; |
a5988c49 | 688 | |
c9ffc77a AE |
689 | con_flag_clear(con, CON_FLAG_LOSSYTX); /* so we retry next connect */ |
690 | con_flag_clear(con, CON_FLAG_KEEPALIVE_PENDING); | |
691 | con_flag_clear(con, CON_FLAG_WRITE_PENDING); | |
692 | con_flag_clear(con, CON_FLAG_BACKOFF); | |
a5988c49 | 693 | |
31b8006e | 694 | reset_connection(con); |
6f2bc3ff | 695 | con->peer_global_seq = 0; |
37ab77ac | 696 | cancel_con(con); |
ee76e073 | 697 | con_close_socket(con); |
ec302645 | 698 | mutex_unlock(&con->mutex); |
31b8006e | 699 | } |
3d14c5d2 | 700 | EXPORT_SYMBOL(ceph_con_close); |
31b8006e | 701 | |
31b8006e SW |
702 | /* |
703 | * Reopen a closed connection, with a new peer address. | |
704 | */ | |
b7a9e5dd SW |
705 | void ceph_con_open(struct ceph_connection *con, |
706 | __u8 entity_type, __u64 entity_num, | |
707 | struct ceph_entity_addr *addr) | |
31b8006e | 708 | { |
5469155f | 709 | mutex_lock(&con->mutex); |
3d14c5d2 | 710 | dout("con_open %p %s\n", con, ceph_pr_addr(&addr->in_addr)); |
8dacc7da | 711 | |
122070a2 | 712 | WARN_ON(con->state != CON_STATE_CLOSED); |
8dacc7da | 713 | con->state = CON_STATE_PREOPEN; |
a5988c49 | 714 | |
b7a9e5dd SW |
715 | con->peer_name.type = (__u8) entity_type; |
716 | con->peer_name.num = cpu_to_le64(entity_num); | |
717 | ||
31b8006e | 718 | memcpy(&con->peer_addr, addr, sizeof(*addr)); |
03c677e1 | 719 | con->delay = 0; /* reset backoff memory */ |
5469155f | 720 | mutex_unlock(&con->mutex); |
31b8006e SW |
721 | queue_con(con); |
722 | } | |
3d14c5d2 | 723 | EXPORT_SYMBOL(ceph_con_open); |
31b8006e | 724 | |
87b315a5 SW |
725 | /* |
726 | * return true if this connection ever successfully opened | |
727 | */ | |
728 | bool ceph_con_opened(struct ceph_connection *con) | |
729 | { | |
730 | return con->connect_seq > 0; | |
731 | } | |
732 | ||
31b8006e SW |
733 | /* |
734 | * initialize a new connection. | |
735 | */ | |
1bfd89f4 AE |
736 | void ceph_con_init(struct ceph_connection *con, void *private, |
737 | const struct ceph_connection_operations *ops, | |
b7a9e5dd | 738 | struct ceph_messenger *msgr) |
31b8006e SW |
739 | { |
740 | dout("con_init %p\n", con); | |
741 | memset(con, 0, sizeof(*con)); | |
1bfd89f4 AE |
742 | con->private = private; |
743 | con->ops = ops; | |
31b8006e | 744 | con->msgr = msgr; |
ce2c8903 AE |
745 | |
746 | con_sock_state_init(con); | |
747 | ||
ec302645 | 748 | mutex_init(&con->mutex); |
31b8006e SW |
749 | INIT_LIST_HEAD(&con->out_queue); |
750 | INIT_LIST_HEAD(&con->out_sent); | |
751 | INIT_DELAYED_WORK(&con->work, con_work); | |
a5988c49 | 752 | |
8dacc7da | 753 | con->state = CON_STATE_CLOSED; |
31b8006e | 754 | } |
3d14c5d2 | 755 | EXPORT_SYMBOL(ceph_con_init); |
31b8006e SW |
756 | |
757 | ||
758 | /* | |
759 | * We maintain a global counter to order connection attempts. Get | |
760 | * a unique seq greater than @gt. | |
761 | */ | |
762 | static u32 get_global_seq(struct ceph_messenger *msgr, u32 gt) | |
763 | { | |
764 | u32 ret; | |
765 | ||
766 | spin_lock(&msgr->global_seq_lock); | |
767 | if (msgr->global_seq < gt) | |
768 | msgr->global_seq = gt; | |
769 | ret = ++msgr->global_seq; | |
770 | spin_unlock(&msgr->global_seq_lock); | |
771 | return ret; | |
772 | } | |
773 | ||
e2200423 | 774 | static void con_out_kvec_reset(struct ceph_connection *con) |
859eb799 AE |
775 | { |
776 | con->out_kvec_left = 0; | |
777 | con->out_kvec_bytes = 0; | |
778 | con->out_kvec_cur = &con->out_kvec[0]; | |
779 | } | |
780 | ||
e2200423 | 781 | static void con_out_kvec_add(struct ceph_connection *con, |
859eb799 AE |
782 | size_t size, void *data) |
783 | { | |
784 | int index; | |
785 | ||
786 | index = con->out_kvec_left; | |
787 | BUG_ON(index >= ARRAY_SIZE(con->out_kvec)); | |
788 | ||
789 | con->out_kvec[index].iov_len = size; | |
790 | con->out_kvec[index].iov_base = data; | |
791 | con->out_kvec_left++; | |
792 | con->out_kvec_bytes += size; | |
793 | } | |
31b8006e | 794 | |
df6ad1f9 | 795 | #ifdef CONFIG_BLOCK |
6aaa4511 AE |
796 | |
797 | /* | |
798 | * For a bio data item, a piece is whatever remains of the next | |
799 | * entry in the current bio iovec, or the first entry in the next | |
800 | * bio in the list. | |
801 | */ | |
8ae4f4f5 | 802 | static void ceph_msg_data_bio_cursor_init(struct ceph_msg_data_cursor *cursor, |
25aff7c5 | 803 | size_t length) |
6aaa4511 | 804 | { |
8ae4f4f5 | 805 | struct ceph_msg_data *data = cursor->data; |
6aaa4511 AE |
806 | struct bio *bio; |
807 | ||
808 | BUG_ON(data->type != CEPH_MSG_DATA_BIO); | |
809 | ||
810 | bio = data->bio; | |
811 | BUG_ON(!bio); | |
6aaa4511 | 812 | |
ca8b3a69 | 813 | cursor->resid = min(length, data->bio_length); |
6aaa4511 | 814 | cursor->bio = bio; |
f38a5181 KO |
815 | cursor->bvec_iter = bio->bi_iter; |
816 | cursor->last_piece = | |
817 | cursor->resid <= bio_iter_len(bio, cursor->bvec_iter); | |
6aaa4511 AE |
818 | } |
819 | ||
8ae4f4f5 | 820 | static struct page *ceph_msg_data_bio_next(struct ceph_msg_data_cursor *cursor, |
6aaa4511 AE |
821 | size_t *page_offset, |
822 | size_t *length) | |
823 | { | |
8ae4f4f5 | 824 | struct ceph_msg_data *data = cursor->data; |
6aaa4511 | 825 | struct bio *bio; |
f38a5181 | 826 | struct bio_vec bio_vec; |
6aaa4511 AE |
827 | |
828 | BUG_ON(data->type != CEPH_MSG_DATA_BIO); | |
829 | ||
830 | bio = cursor->bio; | |
831 | BUG_ON(!bio); | |
832 | ||
f38a5181 | 833 | bio_vec = bio_iter_iovec(bio, cursor->bvec_iter); |
6aaa4511 | 834 | |
f38a5181 | 835 | *page_offset = (size_t) bio_vec.bv_offset; |
6aaa4511 | 836 | BUG_ON(*page_offset >= PAGE_SIZE); |
25aff7c5 AE |
837 | if (cursor->last_piece) /* pagelist offset is always 0 */ |
838 | *length = cursor->resid; | |
839 | else | |
f38a5181 | 840 | *length = (size_t) bio_vec.bv_len; |
25aff7c5 | 841 | BUG_ON(*length > cursor->resid); |
5df521b1 | 842 | BUG_ON(*page_offset + *length > PAGE_SIZE); |
6aaa4511 | 843 | |
f38a5181 | 844 | return bio_vec.bv_page; |
6aaa4511 AE |
845 | } |
846 | ||
8ae4f4f5 AE |
847 | static bool ceph_msg_data_bio_advance(struct ceph_msg_data_cursor *cursor, |
848 | size_t bytes) | |
6aaa4511 | 849 | { |
6aaa4511 | 850 | struct bio *bio; |
f38a5181 | 851 | struct bio_vec bio_vec; |
6aaa4511 | 852 | |
8ae4f4f5 | 853 | BUG_ON(cursor->data->type != CEPH_MSG_DATA_BIO); |
6aaa4511 AE |
854 | |
855 | bio = cursor->bio; | |
856 | BUG_ON(!bio); | |
857 | ||
f38a5181 | 858 | bio_vec = bio_iter_iovec(bio, cursor->bvec_iter); |
6aaa4511 AE |
859 | |
860 | /* Advance the cursor offset */ | |
861 | ||
25aff7c5 AE |
862 | BUG_ON(cursor->resid < bytes); |
863 | cursor->resid -= bytes; | |
f38a5181 KO |
864 | |
865 | bio_advance_iter(bio, &cursor->bvec_iter, bytes); | |
866 | ||
867 | if (bytes < bio_vec.bv_len) | |
6aaa4511 AE |
868 | return false; /* more bytes to process in this segment */ |
869 | ||
870 | /* Move on to the next segment, and possibly the next bio */ | |
871 | ||
f38a5181 | 872 | if (!cursor->bvec_iter.bi_size) { |
6aaa4511 | 873 | bio = bio->bi_next; |
0ec1d15e ID |
874 | cursor->bio = bio; |
875 | if (bio) | |
876 | cursor->bvec_iter = bio->bi_iter; | |
877 | else | |
878 | memset(&cursor->bvec_iter, 0, | |
879 | sizeof(cursor->bvec_iter)); | |
6aaa4511 | 880 | } |
6aaa4511 | 881 | |
25aff7c5 AE |
882 | if (!cursor->last_piece) { |
883 | BUG_ON(!cursor->resid); | |
884 | BUG_ON(!bio); | |
885 | /* A short read is OK, so use <= rather than == */ | |
f38a5181 | 886 | if (cursor->resid <= bio_iter_len(bio, cursor->bvec_iter)) |
6aaa4511 | 887 | cursor->last_piece = true; |
25aff7c5 | 888 | } |
6aaa4511 AE |
889 | |
890 | return true; | |
891 | } | |
ea96571f | 892 | #endif /* CONFIG_BLOCK */ |
df6ad1f9 | 893 | |
e766d7b5 AE |
894 | /* |
895 | * For a page array, a piece comes from the first page in the array | |
896 | * that has not already been fully consumed. | |
897 | */ | |
8ae4f4f5 | 898 | static void ceph_msg_data_pages_cursor_init(struct ceph_msg_data_cursor *cursor, |
25aff7c5 | 899 | size_t length) |
e766d7b5 | 900 | { |
8ae4f4f5 | 901 | struct ceph_msg_data *data = cursor->data; |
e766d7b5 AE |
902 | int page_count; |
903 | ||
904 | BUG_ON(data->type != CEPH_MSG_DATA_PAGES); | |
905 | ||
906 | BUG_ON(!data->pages); | |
907 | BUG_ON(!data->length); | |
908 | ||
ca8b3a69 | 909 | cursor->resid = min(length, data->length); |
e766d7b5 | 910 | page_count = calc_pages_for(data->alignment, (u64)data->length); |
e766d7b5 AE |
911 | cursor->page_offset = data->alignment & ~PAGE_MASK; |
912 | cursor->page_index = 0; | |
56fc5659 AE |
913 | BUG_ON(page_count > (int)USHRT_MAX); |
914 | cursor->page_count = (unsigned short)page_count; | |
915 | BUG_ON(length > SIZE_MAX - cursor->page_offset); | |
5f740d7e | 916 | cursor->last_piece = cursor->page_offset + cursor->resid <= PAGE_SIZE; |
e766d7b5 AE |
917 | } |
918 | ||
8ae4f4f5 AE |
919 | static struct page * |
920 | ceph_msg_data_pages_next(struct ceph_msg_data_cursor *cursor, | |
921 | size_t *page_offset, size_t *length) | |
e766d7b5 | 922 | { |
8ae4f4f5 | 923 | struct ceph_msg_data *data = cursor->data; |
e766d7b5 AE |
924 | |
925 | BUG_ON(data->type != CEPH_MSG_DATA_PAGES); | |
926 | ||
927 | BUG_ON(cursor->page_index >= cursor->page_count); | |
928 | BUG_ON(cursor->page_offset >= PAGE_SIZE); | |
e766d7b5 AE |
929 | |
930 | *page_offset = cursor->page_offset; | |
25aff7c5 | 931 | if (cursor->last_piece) |
e766d7b5 | 932 | *length = cursor->resid; |
25aff7c5 | 933 | else |
e766d7b5 | 934 | *length = PAGE_SIZE - *page_offset; |
e766d7b5 AE |
935 | |
936 | return data->pages[cursor->page_index]; | |
937 | } | |
938 | ||
8ae4f4f5 | 939 | static bool ceph_msg_data_pages_advance(struct ceph_msg_data_cursor *cursor, |
e766d7b5 AE |
940 | size_t bytes) |
941 | { | |
8ae4f4f5 | 942 | BUG_ON(cursor->data->type != CEPH_MSG_DATA_PAGES); |
e766d7b5 AE |
943 | |
944 | BUG_ON(cursor->page_offset + bytes > PAGE_SIZE); | |
e766d7b5 AE |
945 | |
946 | /* Advance the cursor page offset */ | |
947 | ||
948 | cursor->resid -= bytes; | |
5df521b1 AE |
949 | cursor->page_offset = (cursor->page_offset + bytes) & ~PAGE_MASK; |
950 | if (!bytes || cursor->page_offset) | |
e766d7b5 AE |
951 | return false; /* more bytes to process in the current page */ |
952 | ||
d90deda6 YZ |
953 | if (!cursor->resid) |
954 | return false; /* no more data */ | |
955 | ||
5df521b1 | 956 | /* Move on to the next page; offset is already at 0 */ |
e766d7b5 AE |
957 | |
958 | BUG_ON(cursor->page_index >= cursor->page_count); | |
e766d7b5 | 959 | cursor->page_index++; |
25aff7c5 | 960 | cursor->last_piece = cursor->resid <= PAGE_SIZE; |
e766d7b5 AE |
961 | |
962 | return true; | |
963 | } | |
964 | ||
fe38a2b6 | 965 | /* |
dd236fcb AE |
966 | * For a pagelist, a piece is whatever remains to be consumed in the |
967 | * first page in the list, or the front of the next page. | |
fe38a2b6 | 968 | */ |
8ae4f4f5 AE |
969 | static void |
970 | ceph_msg_data_pagelist_cursor_init(struct ceph_msg_data_cursor *cursor, | |
25aff7c5 | 971 | size_t length) |
fe38a2b6 | 972 | { |
8ae4f4f5 | 973 | struct ceph_msg_data *data = cursor->data; |
fe38a2b6 AE |
974 | struct ceph_pagelist *pagelist; |
975 | struct page *page; | |
976 | ||
dd236fcb | 977 | BUG_ON(data->type != CEPH_MSG_DATA_PAGELIST); |
fe38a2b6 AE |
978 | |
979 | pagelist = data->pagelist; | |
980 | BUG_ON(!pagelist); | |
25aff7c5 AE |
981 | |
982 | if (!length) | |
fe38a2b6 AE |
983 | return; /* pagelist can be assigned but empty */ |
984 | ||
985 | BUG_ON(list_empty(&pagelist->head)); | |
986 | page = list_first_entry(&pagelist->head, struct page, lru); | |
987 | ||
ca8b3a69 | 988 | cursor->resid = min(length, pagelist->length); |
fe38a2b6 AE |
989 | cursor->page = page; |
990 | cursor->offset = 0; | |
a51b272e | 991 | cursor->last_piece = cursor->resid <= PAGE_SIZE; |
fe38a2b6 AE |
992 | } |
993 | ||
8ae4f4f5 AE |
994 | static struct page * |
995 | ceph_msg_data_pagelist_next(struct ceph_msg_data_cursor *cursor, | |
996 | size_t *page_offset, size_t *length) | |
fe38a2b6 | 997 | { |
8ae4f4f5 | 998 | struct ceph_msg_data *data = cursor->data; |
fe38a2b6 | 999 | struct ceph_pagelist *pagelist; |
fe38a2b6 AE |
1000 | |
1001 | BUG_ON(data->type != CEPH_MSG_DATA_PAGELIST); | |
1002 | ||
1003 | pagelist = data->pagelist; | |
1004 | BUG_ON(!pagelist); | |
1005 | ||
1006 | BUG_ON(!cursor->page); | |
25aff7c5 | 1007 | BUG_ON(cursor->offset + cursor->resid != pagelist->length); |
fe38a2b6 | 1008 | |
5df521b1 | 1009 | /* offset of first page in pagelist is always 0 */ |
fe38a2b6 | 1010 | *page_offset = cursor->offset & ~PAGE_MASK; |
5df521b1 | 1011 | if (cursor->last_piece) |
25aff7c5 AE |
1012 | *length = cursor->resid; |
1013 | else | |
1014 | *length = PAGE_SIZE - *page_offset; | |
fe38a2b6 | 1015 | |
8ae4f4f5 | 1016 | return cursor->page; |
fe38a2b6 AE |
1017 | } |
1018 | ||
8ae4f4f5 | 1019 | static bool ceph_msg_data_pagelist_advance(struct ceph_msg_data_cursor *cursor, |
dd236fcb | 1020 | size_t bytes) |
fe38a2b6 | 1021 | { |
8ae4f4f5 | 1022 | struct ceph_msg_data *data = cursor->data; |
fe38a2b6 AE |
1023 | struct ceph_pagelist *pagelist; |
1024 | ||
1025 | BUG_ON(data->type != CEPH_MSG_DATA_PAGELIST); | |
1026 | ||
1027 | pagelist = data->pagelist; | |
1028 | BUG_ON(!pagelist); | |
25aff7c5 AE |
1029 | |
1030 | BUG_ON(cursor->offset + cursor->resid != pagelist->length); | |
fe38a2b6 AE |
1031 | BUG_ON((cursor->offset & ~PAGE_MASK) + bytes > PAGE_SIZE); |
1032 | ||
1033 | /* Advance the cursor offset */ | |
1034 | ||
25aff7c5 | 1035 | cursor->resid -= bytes; |
fe38a2b6 | 1036 | cursor->offset += bytes; |
5df521b1 | 1037 | /* offset of first page in pagelist is always 0 */ |
fe38a2b6 AE |
1038 | if (!bytes || cursor->offset & ~PAGE_MASK) |
1039 | return false; /* more bytes to process in the current page */ | |
1040 | ||
d90deda6 YZ |
1041 | if (!cursor->resid) |
1042 | return false; /* no more data */ | |
1043 | ||
fe38a2b6 AE |
1044 | /* Move on to the next page */ |
1045 | ||
1046 | BUG_ON(list_is_last(&cursor->page->lru, &pagelist->head)); | |
1047 | cursor->page = list_entry_next(cursor->page, lru); | |
25aff7c5 | 1048 | cursor->last_piece = cursor->resid <= PAGE_SIZE; |
fe38a2b6 AE |
1049 | |
1050 | return true; | |
1051 | } | |
1052 | ||
dd236fcb AE |
1053 | /* |
1054 | * Message data is handled (sent or received) in pieces, where each | |
1055 | * piece resides on a single page. The network layer might not | |
1056 | * consume an entire piece at once. A data item's cursor keeps | |
1057 | * track of which piece is next to process and how much remains to | |
1058 | * be processed in that piece. It also tracks whether the current | |
1059 | * piece is the last one in the data item. | |
1060 | */ | |
ca8b3a69 | 1061 | static void __ceph_msg_data_cursor_init(struct ceph_msg_data_cursor *cursor) |
dd236fcb | 1062 | { |
ca8b3a69 | 1063 | size_t length = cursor->total_resid; |
8ae4f4f5 | 1064 | |
8ae4f4f5 | 1065 | switch (cursor->data->type) { |
dd236fcb | 1066 | case CEPH_MSG_DATA_PAGELIST: |
8ae4f4f5 | 1067 | ceph_msg_data_pagelist_cursor_init(cursor, length); |
dd236fcb | 1068 | break; |
e766d7b5 | 1069 | case CEPH_MSG_DATA_PAGES: |
8ae4f4f5 | 1070 | ceph_msg_data_pages_cursor_init(cursor, length); |
e766d7b5 | 1071 | break; |
dd236fcb AE |
1072 | #ifdef CONFIG_BLOCK |
1073 | case CEPH_MSG_DATA_BIO: | |
8ae4f4f5 | 1074 | ceph_msg_data_bio_cursor_init(cursor, length); |
6aaa4511 | 1075 | break; |
dd236fcb | 1076 | #endif /* CONFIG_BLOCK */ |
6aaa4511 | 1077 | case CEPH_MSG_DATA_NONE: |
dd236fcb AE |
1078 | default: |
1079 | /* BUG(); */ | |
1080 | break; | |
1081 | } | |
8ae4f4f5 | 1082 | cursor->need_crc = true; |
dd236fcb AE |
1083 | } |
1084 | ||
ca8b3a69 AE |
1085 | static void ceph_msg_data_cursor_init(struct ceph_msg *msg, size_t length) |
1086 | { | |
1087 | struct ceph_msg_data_cursor *cursor = &msg->cursor; | |
1088 | struct ceph_msg_data *data; | |
1089 | ||
1090 | BUG_ON(!length); | |
1091 | BUG_ON(length > msg->data_length); | |
1092 | BUG_ON(list_empty(&msg->data)); | |
1093 | ||
ca8b3a69 AE |
1094 | cursor->data_head = &msg->data; |
1095 | cursor->total_resid = length; | |
1096 | data = list_first_entry(&msg->data, struct ceph_msg_data, links); | |
1097 | cursor->data = data; | |
1098 | ||
1099 | __ceph_msg_data_cursor_init(cursor); | |
1100 | } | |
1101 | ||
dd236fcb AE |
1102 | /* |
1103 | * Return the page containing the next piece to process for a given | |
1104 | * data item, and supply the page offset and length of that piece. | |
1105 | * Indicate whether this is the last piece in this data item. | |
1106 | */ | |
8ae4f4f5 AE |
1107 | static struct page *ceph_msg_data_next(struct ceph_msg_data_cursor *cursor, |
1108 | size_t *page_offset, size_t *length, | |
dd236fcb AE |
1109 | bool *last_piece) |
1110 | { | |
1111 | struct page *page; | |
1112 | ||
8ae4f4f5 | 1113 | switch (cursor->data->type) { |
dd236fcb | 1114 | case CEPH_MSG_DATA_PAGELIST: |
8ae4f4f5 | 1115 | page = ceph_msg_data_pagelist_next(cursor, page_offset, length); |
dd236fcb | 1116 | break; |
e766d7b5 | 1117 | case CEPH_MSG_DATA_PAGES: |
8ae4f4f5 | 1118 | page = ceph_msg_data_pages_next(cursor, page_offset, length); |
e766d7b5 | 1119 | break; |
dd236fcb AE |
1120 | #ifdef CONFIG_BLOCK |
1121 | case CEPH_MSG_DATA_BIO: | |
8ae4f4f5 | 1122 | page = ceph_msg_data_bio_next(cursor, page_offset, length); |
6aaa4511 | 1123 | break; |
dd236fcb | 1124 | #endif /* CONFIG_BLOCK */ |
6aaa4511 | 1125 | case CEPH_MSG_DATA_NONE: |
dd236fcb AE |
1126 | default: |
1127 | page = NULL; | |
1128 | break; | |
1129 | } | |
1130 | BUG_ON(!page); | |
1131 | BUG_ON(*page_offset + *length > PAGE_SIZE); | |
1132 | BUG_ON(!*length); | |
1133 | if (last_piece) | |
8ae4f4f5 | 1134 | *last_piece = cursor->last_piece; |
dd236fcb AE |
1135 | |
1136 | return page; | |
1137 | } | |
1138 | ||
1139 | /* | |
1140 | * Returns true if the result moves the cursor on to the next piece | |
1141 | * of the data item. | |
1142 | */ | |
8ae4f4f5 AE |
1143 | static bool ceph_msg_data_advance(struct ceph_msg_data_cursor *cursor, |
1144 | size_t bytes) | |
dd236fcb AE |
1145 | { |
1146 | bool new_piece; | |
1147 | ||
25aff7c5 | 1148 | BUG_ON(bytes > cursor->resid); |
8ae4f4f5 | 1149 | switch (cursor->data->type) { |
dd236fcb | 1150 | case CEPH_MSG_DATA_PAGELIST: |
8ae4f4f5 | 1151 | new_piece = ceph_msg_data_pagelist_advance(cursor, bytes); |
dd236fcb | 1152 | break; |
e766d7b5 | 1153 | case CEPH_MSG_DATA_PAGES: |
8ae4f4f5 | 1154 | new_piece = ceph_msg_data_pages_advance(cursor, bytes); |
e766d7b5 | 1155 | break; |
dd236fcb AE |
1156 | #ifdef CONFIG_BLOCK |
1157 | case CEPH_MSG_DATA_BIO: | |
8ae4f4f5 | 1158 | new_piece = ceph_msg_data_bio_advance(cursor, bytes); |
6aaa4511 | 1159 | break; |
dd236fcb | 1160 | #endif /* CONFIG_BLOCK */ |
6aaa4511 | 1161 | case CEPH_MSG_DATA_NONE: |
dd236fcb AE |
1162 | default: |
1163 | BUG(); | |
1164 | break; | |
1165 | } | |
ca8b3a69 | 1166 | cursor->total_resid -= bytes; |
dd236fcb | 1167 | |
ca8b3a69 AE |
1168 | if (!cursor->resid && cursor->total_resid) { |
1169 | WARN_ON(!cursor->last_piece); | |
1170 | BUG_ON(list_is_last(&cursor->data->links, cursor->data_head)); | |
1171 | cursor->data = list_entry_next(cursor->data, links); | |
1172 | __ceph_msg_data_cursor_init(cursor); | |
a51b272e | 1173 | new_piece = true; |
ca8b3a69 | 1174 | } |
a51b272e | 1175 | cursor->need_crc = new_piece; |
ca8b3a69 | 1176 | |
dd236fcb AE |
1177 | return new_piece; |
1178 | } | |
1179 | ||
98fa5dd8 | 1180 | static void prepare_message_data(struct ceph_msg *msg, u32 data_len) |
739c905b | 1181 | { |
739c905b | 1182 | BUG_ON(!msg); |
25aff7c5 | 1183 | BUG_ON(!data_len); |
739c905b | 1184 | |
4c59b4a2 | 1185 | /* Initialize data cursor */ |
fe38a2b6 | 1186 | |
8ae4f4f5 | 1187 | ceph_msg_data_cursor_init(msg, (size_t)data_len); |
739c905b AE |
1188 | } |
1189 | ||
31b8006e SW |
1190 | /* |
1191 | * Prepare footer for currently outgoing message, and finish things | |
1192 | * off. Assumes out_kvec* are already valid.. we just add on to the end. | |
1193 | */ | |
859eb799 | 1194 | static void prepare_write_message_footer(struct ceph_connection *con) |
31b8006e SW |
1195 | { |
1196 | struct ceph_msg *m = con->out_msg; | |
859eb799 | 1197 | int v = con->out_kvec_left; |
31b8006e | 1198 | |
fd154f3c AE |
1199 | m->footer.flags |= CEPH_MSG_FOOTER_COMPLETE; |
1200 | ||
31b8006e SW |
1201 | dout("prepare_write_message_footer %p\n", con); |
1202 | con->out_kvec_is_msg = true; | |
1203 | con->out_kvec[v].iov_base = &m->footer; | |
33d07337 YZ |
1204 | if (con->peer_features & CEPH_FEATURE_MSG_AUTH) { |
1205 | if (con->ops->sign_message) | |
1206 | con->ops->sign_message(con, m); | |
1207 | else | |
1208 | m->footer.sig = 0; | |
1209 | con->out_kvec[v].iov_len = sizeof(m->footer); | |
1210 | con->out_kvec_bytes += sizeof(m->footer); | |
1211 | } else { | |
1212 | m->old_footer.flags = m->footer.flags; | |
1213 | con->out_kvec[v].iov_len = sizeof(m->old_footer); | |
1214 | con->out_kvec_bytes += sizeof(m->old_footer); | |
1215 | } | |
31b8006e SW |
1216 | con->out_kvec_left++; |
1217 | con->out_more = m->more_to_follow; | |
c86a2930 | 1218 | con->out_msg_done = true; |
31b8006e SW |
1219 | } |
1220 | ||
1221 | /* | |
1222 | * Prepare headers for the next outgoing message. | |
1223 | */ | |
1224 | static void prepare_write_message(struct ceph_connection *con) | |
1225 | { | |
1226 | struct ceph_msg *m; | |
a9a0c51a | 1227 | u32 crc; |
31b8006e | 1228 | |
e2200423 | 1229 | con_out_kvec_reset(con); |
31b8006e | 1230 | con->out_kvec_is_msg = true; |
c86a2930 | 1231 | con->out_msg_done = false; |
31b8006e SW |
1232 | |
1233 | /* Sneak an ack in there first? If we can get it into the same | |
1234 | * TCP packet that's a good thing. */ | |
1235 | if (con->in_seq > con->in_seq_acked) { | |
1236 | con->in_seq_acked = con->in_seq; | |
e2200423 | 1237 | con_out_kvec_add(con, sizeof (tag_ack), &tag_ack); |
31b8006e | 1238 | con->out_temp_ack = cpu_to_le64(con->in_seq_acked); |
e2200423 | 1239 | con_out_kvec_add(con, sizeof (con->out_temp_ack), |
859eb799 | 1240 | &con->out_temp_ack); |
31b8006e SW |
1241 | } |
1242 | ||
38941f80 | 1243 | BUG_ON(list_empty(&con->out_queue)); |
859eb799 | 1244 | m = list_first_entry(&con->out_queue, struct ceph_msg, list_head); |
c86a2930 | 1245 | con->out_msg = m; |
38941f80 | 1246 | BUG_ON(m->con != con); |
4cf9d544 SW |
1247 | |
1248 | /* put message on sent list */ | |
1249 | ceph_msg_get(m); | |
1250 | list_move_tail(&m->list_head, &con->out_sent); | |
31b8006e | 1251 | |
e84346b7 SW |
1252 | /* |
1253 | * only assign outgoing seq # if we haven't sent this message | |
1254 | * yet. if it is requeued, resend with it's original seq. | |
1255 | */ | |
1256 | if (m->needs_out_seq) { | |
1257 | m->hdr.seq = cpu_to_le64(++con->out_seq); | |
1258 | m->needs_out_seq = false; | |
1259 | } | |
98fa5dd8 | 1260 | WARN_ON(m->data_length != le32_to_cpu(m->hdr.data_len)); |
31b8006e | 1261 | |
98fa5dd8 | 1262 | dout("prepare_write_message %p seq %lld type %d len %d+%d+%zd\n", |
31b8006e SW |
1263 | m, con->out_seq, le16_to_cpu(m->hdr.type), |
1264 | le32_to_cpu(m->hdr.front_len), le32_to_cpu(m->hdr.middle_len), | |
98fa5dd8 | 1265 | m->data_length); |
31b8006e SW |
1266 | BUG_ON(le32_to_cpu(m->hdr.front_len) != m->front.iov_len); |
1267 | ||
1268 | /* tag + hdr + front + middle */ | |
e2200423 AE |
1269 | con_out_kvec_add(con, sizeof (tag_msg), &tag_msg); |
1270 | con_out_kvec_add(con, sizeof (m->hdr), &m->hdr); | |
1271 | con_out_kvec_add(con, m->front.iov_len, m->front.iov_base); | |
859eb799 | 1272 | |
31b8006e | 1273 | if (m->middle) |
e2200423 | 1274 | con_out_kvec_add(con, m->middle->vec.iov_len, |
859eb799 | 1275 | m->middle->vec.iov_base); |
31b8006e SW |
1276 | |
1277 | /* fill in crc (except data pages), footer */ | |
a9a0c51a AE |
1278 | crc = crc32c(0, &m->hdr, offsetof(struct ceph_msg_header, crc)); |
1279 | con->out_msg->hdr.crc = cpu_to_le32(crc); | |
fd154f3c | 1280 | con->out_msg->footer.flags = 0; |
a9a0c51a AE |
1281 | |
1282 | crc = crc32c(0, m->front.iov_base, m->front.iov_len); | |
1283 | con->out_msg->footer.front_crc = cpu_to_le32(crc); | |
1284 | if (m->middle) { | |
1285 | crc = crc32c(0, m->middle->vec.iov_base, | |
1286 | m->middle->vec.iov_len); | |
1287 | con->out_msg->footer.middle_crc = cpu_to_le32(crc); | |
1288 | } else | |
31b8006e | 1289 | con->out_msg->footer.middle_crc = 0; |
739c905b | 1290 | dout("%s front_crc %u middle_crc %u\n", __func__, |
31b8006e SW |
1291 | le32_to_cpu(con->out_msg->footer.front_crc), |
1292 | le32_to_cpu(con->out_msg->footer.middle_crc)); | |
1293 | ||
1294 | /* is there a data payload? */ | |
739c905b | 1295 | con->out_msg->footer.data_crc = 0; |
98fa5dd8 AE |
1296 | if (m->data_length) { |
1297 | prepare_message_data(con->out_msg, m->data_length); | |
78625051 AE |
1298 | con->out_more = 1; /* data + footer will follow */ |
1299 | } else { | |
31b8006e | 1300 | /* no, queue up footer too and be done */ |
859eb799 | 1301 | prepare_write_message_footer(con); |
78625051 | 1302 | } |
31b8006e | 1303 | |
c9ffc77a | 1304 | con_flag_set(con, CON_FLAG_WRITE_PENDING); |
31b8006e SW |
1305 | } |
1306 | ||
1307 | /* | |
1308 | * Prepare an ack. | |
1309 | */ | |
1310 | static void prepare_write_ack(struct ceph_connection *con) | |
1311 | { | |
1312 | dout("prepare_write_ack %p %llu -> %llu\n", con, | |
1313 | con->in_seq_acked, con->in_seq); | |
1314 | con->in_seq_acked = con->in_seq; | |
1315 | ||
e2200423 | 1316 | con_out_kvec_reset(con); |
859eb799 | 1317 | |
e2200423 | 1318 | con_out_kvec_add(con, sizeof (tag_ack), &tag_ack); |
859eb799 | 1319 | |
31b8006e | 1320 | con->out_temp_ack = cpu_to_le64(con->in_seq_acked); |
e2200423 | 1321 | con_out_kvec_add(con, sizeof (con->out_temp_ack), |
859eb799 AE |
1322 | &con->out_temp_ack); |
1323 | ||
31b8006e | 1324 | con->out_more = 1; /* more will follow.. eventually.. */ |
c9ffc77a | 1325 | con_flag_set(con, CON_FLAG_WRITE_PENDING); |
31b8006e SW |
1326 | } |
1327 | ||
3a23083b SW |
1328 | /* |
1329 | * Prepare to share the seq during handshake | |
1330 | */ | |
1331 | static void prepare_write_seq(struct ceph_connection *con) | |
1332 | { | |
1333 | dout("prepare_write_seq %p %llu -> %llu\n", con, | |
1334 | con->in_seq_acked, con->in_seq); | |
1335 | con->in_seq_acked = con->in_seq; | |
1336 | ||
1337 | con_out_kvec_reset(con); | |
1338 | ||
1339 | con->out_temp_ack = cpu_to_le64(con->in_seq_acked); | |
1340 | con_out_kvec_add(con, sizeof (con->out_temp_ack), | |
1341 | &con->out_temp_ack); | |
1342 | ||
1343 | con_flag_set(con, CON_FLAG_WRITE_PENDING); | |
1344 | } | |
1345 | ||
31b8006e SW |
1346 | /* |
1347 | * Prepare to write keepalive byte. | |
1348 | */ | |
1349 | static void prepare_write_keepalive(struct ceph_connection *con) | |
1350 | { | |
1351 | dout("prepare_write_keepalive %p\n", con); | |
e2200423 AE |
1352 | con_out_kvec_reset(con); |
1353 | con_out_kvec_add(con, sizeof (tag_keepalive), &tag_keepalive); | |
c9ffc77a | 1354 | con_flag_set(con, CON_FLAG_WRITE_PENDING); |
31b8006e SW |
1355 | } |
1356 | ||
1357 | /* | |
1358 | * Connection negotiation. | |
1359 | */ | |
1360 | ||
dac1e716 AE |
1361 | static struct ceph_auth_handshake *get_connect_authorizer(struct ceph_connection *con, |
1362 | int *auth_proto) | |
4e7a5dcd | 1363 | { |
a3530df3 | 1364 | struct ceph_auth_handshake *auth; |
b1c6b980 AE |
1365 | |
1366 | if (!con->ops->get_authorizer) { | |
1367 | con->out_connect.authorizer_protocol = CEPH_AUTH_UNKNOWN; | |
1368 | con->out_connect.authorizer_len = 0; | |
729796be | 1369 | return NULL; |
b1c6b980 AE |
1370 | } |
1371 | ||
1372 | /* Can't hold the mutex while getting authorizer */ | |
ec302645 | 1373 | mutex_unlock(&con->mutex); |
dac1e716 | 1374 | auth = con->ops->get_authorizer(con, auth_proto, con->auth_retry); |
ec302645 | 1375 | mutex_lock(&con->mutex); |
4e7a5dcd | 1376 | |
a3530df3 | 1377 | if (IS_ERR(auth)) |
729796be | 1378 | return auth; |
8dacc7da | 1379 | if (con->state != CON_STATE_NEGOTIATING) |
729796be | 1380 | return ERR_PTR(-EAGAIN); |
0da5d703 | 1381 | |
8f43fb53 AE |
1382 | con->auth_reply_buf = auth->authorizer_reply_buf; |
1383 | con->auth_reply_buf_len = auth->authorizer_reply_buf_len; | |
729796be | 1384 | return auth; |
4e7a5dcd SW |
1385 | } |
1386 | ||
31b8006e SW |
1387 | /* |
1388 | * We connected to a peer and are saying hello. | |
1389 | */ | |
e825a66d | 1390 | static void prepare_write_banner(struct ceph_connection *con) |
31b8006e | 1391 | { |
e2200423 AE |
1392 | con_out_kvec_add(con, strlen(CEPH_BANNER), CEPH_BANNER); |
1393 | con_out_kvec_add(con, sizeof (con->msgr->my_enc_addr), | |
e825a66d | 1394 | &con->msgr->my_enc_addr); |
eed0ef2c | 1395 | |
eed0ef2c | 1396 | con->out_more = 0; |
c9ffc77a | 1397 | con_flag_set(con, CON_FLAG_WRITE_PENDING); |
eed0ef2c SW |
1398 | } |
1399 | ||
e825a66d | 1400 | static int prepare_write_connect(struct ceph_connection *con) |
eed0ef2c | 1401 | { |
95c96174 | 1402 | unsigned int global_seq = get_global_seq(con->msgr, 0); |
31b8006e | 1403 | int proto; |
dac1e716 | 1404 | int auth_proto; |
729796be | 1405 | struct ceph_auth_handshake *auth; |
31b8006e SW |
1406 | |
1407 | switch (con->peer_name.type) { | |
1408 | case CEPH_ENTITY_TYPE_MON: | |
1409 | proto = CEPH_MONC_PROTOCOL; | |
1410 | break; | |
1411 | case CEPH_ENTITY_TYPE_OSD: | |
1412 | proto = CEPH_OSDC_PROTOCOL; | |
1413 | break; | |
1414 | case CEPH_ENTITY_TYPE_MDS: | |
1415 | proto = CEPH_MDSC_PROTOCOL; | |
1416 | break; | |
1417 | default: | |
1418 | BUG(); | |
1419 | } | |
1420 | ||
1421 | dout("prepare_write_connect %p cseq=%d gseq=%d proto=%d\n", con, | |
1422 | con->connect_seq, global_seq, proto); | |
4e7a5dcd | 1423 | |
e825a66d | 1424 | con->out_connect.features = cpu_to_le64(con->msgr->supported_features); |
31b8006e SW |
1425 | con->out_connect.host_type = cpu_to_le32(CEPH_ENTITY_TYPE_CLIENT); |
1426 | con->out_connect.connect_seq = cpu_to_le32(con->connect_seq); | |
1427 | con->out_connect.global_seq = cpu_to_le32(global_seq); | |
1428 | con->out_connect.protocol_version = cpu_to_le32(proto); | |
1429 | con->out_connect.flags = 0; | |
31b8006e | 1430 | |
dac1e716 AE |
1431 | auth_proto = CEPH_AUTH_UNKNOWN; |
1432 | auth = get_connect_authorizer(con, &auth_proto); | |
729796be AE |
1433 | if (IS_ERR(auth)) |
1434 | return PTR_ERR(auth); | |
3da54776 | 1435 | |
dac1e716 | 1436 | con->out_connect.authorizer_protocol = cpu_to_le32(auth_proto); |
3da54776 AE |
1437 | con->out_connect.authorizer_len = auth ? |
1438 | cpu_to_le32(auth->authorizer_buf_len) : 0; | |
1439 | ||
e2200423 | 1440 | con_out_kvec_add(con, sizeof (con->out_connect), |
3da54776 AE |
1441 | &con->out_connect); |
1442 | if (auth && auth->authorizer_buf_len) | |
e2200423 | 1443 | con_out_kvec_add(con, auth->authorizer_buf_len, |
3da54776 | 1444 | auth->authorizer_buf); |
859eb799 | 1445 | |
31b8006e | 1446 | con->out_more = 0; |
c9ffc77a | 1447 | con_flag_set(con, CON_FLAG_WRITE_PENDING); |
4e7a5dcd | 1448 | |
e10c758e | 1449 | return 0; |
31b8006e SW |
1450 | } |
1451 | ||
31b8006e SW |
1452 | /* |
1453 | * write as much of pending kvecs to the socket as we can. | |
1454 | * 1 -> done | |
1455 | * 0 -> socket full, but more to do | |
1456 | * <0 -> error | |
1457 | */ | |
1458 | static int write_partial_kvec(struct ceph_connection *con) | |
1459 | { | |
1460 | int ret; | |
1461 | ||
1462 | dout("write_partial_kvec %p %d left\n", con, con->out_kvec_bytes); | |
1463 | while (con->out_kvec_bytes > 0) { | |
1464 | ret = ceph_tcp_sendmsg(con->sock, con->out_kvec_cur, | |
1465 | con->out_kvec_left, con->out_kvec_bytes, | |
1466 | con->out_more); | |
1467 | if (ret <= 0) | |
1468 | goto out; | |
1469 | con->out_kvec_bytes -= ret; | |
1470 | if (con->out_kvec_bytes == 0) | |
1471 | break; /* done */ | |
f42299e6 AE |
1472 | |
1473 | /* account for full iov entries consumed */ | |
1474 | while (ret >= con->out_kvec_cur->iov_len) { | |
1475 | BUG_ON(!con->out_kvec_left); | |
1476 | ret -= con->out_kvec_cur->iov_len; | |
1477 | con->out_kvec_cur++; | |
1478 | con->out_kvec_left--; | |
1479 | } | |
1480 | /* and for a partially-consumed entry */ | |
1481 | if (ret) { | |
1482 | con->out_kvec_cur->iov_len -= ret; | |
1483 | con->out_kvec_cur->iov_base += ret; | |
31b8006e SW |
1484 | } |
1485 | } | |
1486 | con->out_kvec_left = 0; | |
1487 | con->out_kvec_is_msg = false; | |
1488 | ret = 1; | |
1489 | out: | |
1490 | dout("write_partial_kvec %p %d left in %d kvecs ret = %d\n", con, | |
1491 | con->out_kvec_bytes, con->out_kvec_left, ret); | |
1492 | return ret; /* done! */ | |
1493 | } | |
1494 | ||
35b62808 AE |
1495 | static u32 ceph_crc32c_page(u32 crc, struct page *page, |
1496 | unsigned int page_offset, | |
1497 | unsigned int length) | |
1498 | { | |
1499 | char *kaddr; | |
1500 | ||
1501 | kaddr = kmap(page); | |
1502 | BUG_ON(kaddr == NULL); | |
1503 | crc = crc32c(crc, kaddr + page_offset, length); | |
1504 | kunmap(page); | |
1505 | ||
1506 | return crc; | |
1507 | } | |
31b8006e SW |
1508 | /* |
1509 | * Write as much message data payload as we can. If we finish, queue | |
1510 | * up the footer. | |
1511 | * 1 -> done, footer is now queued in out_kvec[]. | |
1512 | * 0 -> socket full, but more to do | |
1513 | * <0 -> error | |
1514 | */ | |
34d2d200 | 1515 | static int write_partial_message_data(struct ceph_connection *con) |
31b8006e SW |
1516 | { |
1517 | struct ceph_msg *msg = con->out_msg; | |
8ae4f4f5 | 1518 | struct ceph_msg_data_cursor *cursor = &msg->cursor; |
37675b0f | 1519 | bool do_datacrc = !con->msgr->nocrc; |
f5db90bc | 1520 | u32 crc; |
31b8006e | 1521 | |
859a35d5 | 1522 | dout("%s %p msg %p\n", __func__, con, msg); |
31b8006e | 1523 | |
5240d9f9 | 1524 | if (list_empty(&msg->data)) |
4c59b4a2 AE |
1525 | return -EINVAL; |
1526 | ||
5821bd8c AE |
1527 | /* |
1528 | * Iterate through each page that contains data to be | |
1529 | * written, and send as much as possible for each. | |
1530 | * | |
1531 | * If we are calculating the data crc (the default), we will | |
1532 | * need to map the page. If we have no pages, they have | |
1533 | * been revoked, so use the zero page. | |
1534 | */ | |
f5db90bc | 1535 | crc = do_datacrc ? le32_to_cpu(msg->footer.data_crc) : 0; |
643c68a4 | 1536 | while (cursor->resid) { |
8a166d05 | 1537 | struct page *page; |
e387d525 AE |
1538 | size_t page_offset; |
1539 | size_t length; | |
8a166d05 | 1540 | bool last_piece; |
8ea299bc | 1541 | bool need_crc; |
f5db90bc | 1542 | int ret; |
68b4476b | 1543 | |
8ae4f4f5 | 1544 | page = ceph_msg_data_next(&msg->cursor, &page_offset, &length, |
4c59b4a2 | 1545 | &last_piece); |
e387d525 | 1546 | ret = ceph_tcp_sendpage(con->sock, page, page_offset, |
fe38a2b6 | 1547 | length, last_piece); |
f5db90bc AE |
1548 | if (ret <= 0) { |
1549 | if (do_datacrc) | |
1550 | msg->footer.data_crc = cpu_to_le32(crc); | |
31b8006e | 1551 | |
f5db90bc AE |
1552 | return ret; |
1553 | } | |
143334ff AE |
1554 | if (do_datacrc && cursor->need_crc) |
1555 | crc = ceph_crc32c_page(crc, page, page_offset, length); | |
8ae4f4f5 | 1556 | need_crc = ceph_msg_data_advance(&msg->cursor, (size_t)ret); |
31b8006e SW |
1557 | } |
1558 | ||
34d2d200 | 1559 | dout("%s %p msg %p done\n", __func__, con, msg); |
31b8006e SW |
1560 | |
1561 | /* prepare and queue up footer, too */ | |
f5db90bc AE |
1562 | if (do_datacrc) |
1563 | msg->footer.data_crc = cpu_to_le32(crc); | |
1564 | else | |
84ca8fc8 | 1565 | msg->footer.flags |= CEPH_MSG_FOOTER_NOCRC; |
e2200423 | 1566 | con_out_kvec_reset(con); |
859eb799 | 1567 | prepare_write_message_footer(con); |
f5db90bc AE |
1568 | |
1569 | return 1; /* must return > 0 to indicate success */ | |
31b8006e SW |
1570 | } |
1571 | ||
1572 | /* | |
1573 | * write some zeros | |
1574 | */ | |
1575 | static int write_partial_skip(struct ceph_connection *con) | |
1576 | { | |
1577 | int ret; | |
1578 | ||
1579 | while (con->out_skip > 0) { | |
31739139 | 1580 | size_t size = min(con->out_skip, (int) PAGE_CACHE_SIZE); |
31b8006e | 1581 | |
e1dcb128 | 1582 | ret = ceph_tcp_sendpage(con->sock, zero_page, 0, size, true); |
31b8006e SW |
1583 | if (ret <= 0) |
1584 | goto out; | |
1585 | con->out_skip -= ret; | |
1586 | } | |
1587 | ret = 1; | |
1588 | out: | |
1589 | return ret; | |
1590 | } | |
1591 | ||
1592 | /* | |
1593 | * Prepare to read connection handshake, or an ack. | |
1594 | */ | |
eed0ef2c SW |
1595 | static void prepare_read_banner(struct ceph_connection *con) |
1596 | { | |
1597 | dout("prepare_read_banner %p\n", con); | |
1598 | con->in_base_pos = 0; | |
1599 | } | |
1600 | ||
31b8006e SW |
1601 | static void prepare_read_connect(struct ceph_connection *con) |
1602 | { | |
1603 | dout("prepare_read_connect %p\n", con); | |
1604 | con->in_base_pos = 0; | |
1605 | } | |
1606 | ||
1607 | static void prepare_read_ack(struct ceph_connection *con) | |
1608 | { | |
1609 | dout("prepare_read_ack %p\n", con); | |
1610 | con->in_base_pos = 0; | |
1611 | } | |
1612 | ||
3a23083b SW |
1613 | static void prepare_read_seq(struct ceph_connection *con) |
1614 | { | |
1615 | dout("prepare_read_seq %p\n", con); | |
1616 | con->in_base_pos = 0; | |
1617 | con->in_tag = CEPH_MSGR_TAG_SEQ; | |
1618 | } | |
1619 | ||
31b8006e SW |
1620 | static void prepare_read_tag(struct ceph_connection *con) |
1621 | { | |
1622 | dout("prepare_read_tag %p\n", con); | |
1623 | con->in_base_pos = 0; | |
1624 | con->in_tag = CEPH_MSGR_TAG_READY; | |
1625 | } | |
1626 | ||
1627 | /* | |
1628 | * Prepare to read a message. | |
1629 | */ | |
1630 | static int prepare_read_message(struct ceph_connection *con) | |
1631 | { | |
1632 | dout("prepare_read_message %p\n", con); | |
1633 | BUG_ON(con->in_msg != NULL); | |
1634 | con->in_base_pos = 0; | |
1635 | con->in_front_crc = con->in_middle_crc = con->in_data_crc = 0; | |
1636 | return 0; | |
1637 | } | |
1638 | ||
1639 | ||
1640 | static int read_partial(struct ceph_connection *con, | |
fd51653f | 1641 | int end, int size, void *object) |
31b8006e | 1642 | { |
e6cee71f AE |
1643 | while (con->in_base_pos < end) { |
1644 | int left = end - con->in_base_pos; | |
31b8006e SW |
1645 | int have = size - left; |
1646 | int ret = ceph_tcp_recvmsg(con->sock, object + have, left); | |
1647 | if (ret <= 0) | |
1648 | return ret; | |
1649 | con->in_base_pos += ret; | |
1650 | } | |
1651 | return 1; | |
1652 | } | |
1653 | ||
1654 | ||
1655 | /* | |
1656 | * Read all or part of the connect-side handshake on a new connection | |
1657 | */ | |
eed0ef2c | 1658 | static int read_partial_banner(struct ceph_connection *con) |
31b8006e | 1659 | { |
fd51653f AE |
1660 | int size; |
1661 | int end; | |
1662 | int ret; | |
31b8006e | 1663 | |
eed0ef2c | 1664 | dout("read_partial_banner %p at %d\n", con, con->in_base_pos); |
31b8006e SW |
1665 | |
1666 | /* peer's banner */ | |
fd51653f AE |
1667 | size = strlen(CEPH_BANNER); |
1668 | end = size; | |
1669 | ret = read_partial(con, end, size, con->in_banner); | |
31b8006e SW |
1670 | if (ret <= 0) |
1671 | goto out; | |
fd51653f AE |
1672 | |
1673 | size = sizeof (con->actual_peer_addr); | |
1674 | end += size; | |
1675 | ret = read_partial(con, end, size, &con->actual_peer_addr); | |
31b8006e SW |
1676 | if (ret <= 0) |
1677 | goto out; | |
fd51653f AE |
1678 | |
1679 | size = sizeof (con->peer_addr_for_me); | |
1680 | end += size; | |
1681 | ret = read_partial(con, end, size, &con->peer_addr_for_me); | |
31b8006e SW |
1682 | if (ret <= 0) |
1683 | goto out; | |
fd51653f | 1684 | |
eed0ef2c SW |
1685 | out: |
1686 | return ret; | |
1687 | } | |
1688 | ||
1689 | static int read_partial_connect(struct ceph_connection *con) | |
1690 | { | |
fd51653f AE |
1691 | int size; |
1692 | int end; | |
1693 | int ret; | |
eed0ef2c SW |
1694 | |
1695 | dout("read_partial_connect %p at %d\n", con, con->in_base_pos); | |
1696 | ||
fd51653f AE |
1697 | size = sizeof (con->in_reply); |
1698 | end = size; | |
1699 | ret = read_partial(con, end, size, &con->in_reply); | |
31b8006e SW |
1700 | if (ret <= 0) |
1701 | goto out; | |
fd51653f AE |
1702 | |
1703 | size = le32_to_cpu(con->in_reply.authorizer_len); | |
1704 | end += size; | |
1705 | ret = read_partial(con, end, size, con->auth_reply_buf); | |
4e7a5dcd SW |
1706 | if (ret <= 0) |
1707 | goto out; | |
31b8006e | 1708 | |
4e7a5dcd SW |
1709 | dout("read_partial_connect %p tag %d, con_seq = %u, g_seq = %u\n", |
1710 | con, (int)con->in_reply.tag, | |
1711 | le32_to_cpu(con->in_reply.connect_seq), | |
31b8006e SW |
1712 | le32_to_cpu(con->in_reply.global_seq)); |
1713 | out: | |
1714 | return ret; | |
eed0ef2c | 1715 | |
31b8006e SW |
1716 | } |
1717 | ||
1718 | /* | |
1719 | * Verify the hello banner looks okay. | |
1720 | */ | |
1721 | static int verify_hello(struct ceph_connection *con) | |
1722 | { | |
1723 | if (memcmp(con->in_banner, CEPH_BANNER, strlen(CEPH_BANNER))) { | |
13e38c8a | 1724 | pr_err("connect to %s got bad banner\n", |
3d14c5d2 | 1725 | ceph_pr_addr(&con->peer_addr.in_addr)); |
31b8006e SW |
1726 | con->error_msg = "protocol error, bad banner"; |
1727 | return -1; | |
1728 | } | |
1729 | return 0; | |
1730 | } | |
1731 | ||
1732 | static bool addr_is_blank(struct sockaddr_storage *ss) | |
1733 | { | |
1734 | switch (ss->ss_family) { | |
1735 | case AF_INET: | |
1736 | return ((struct sockaddr_in *)ss)->sin_addr.s_addr == 0; | |
1737 | case AF_INET6: | |
1738 | return | |
1739 | ((struct sockaddr_in6 *)ss)->sin6_addr.s6_addr32[0] == 0 && | |
1740 | ((struct sockaddr_in6 *)ss)->sin6_addr.s6_addr32[1] == 0 && | |
1741 | ((struct sockaddr_in6 *)ss)->sin6_addr.s6_addr32[2] == 0 && | |
1742 | ((struct sockaddr_in6 *)ss)->sin6_addr.s6_addr32[3] == 0; | |
1743 | } | |
1744 | return false; | |
1745 | } | |
1746 | ||
1747 | static int addr_port(struct sockaddr_storage *ss) | |
1748 | { | |
1749 | switch (ss->ss_family) { | |
1750 | case AF_INET: | |
f28bcfbe | 1751 | return ntohs(((struct sockaddr_in *)ss)->sin_port); |
31b8006e | 1752 | case AF_INET6: |
f28bcfbe | 1753 | return ntohs(((struct sockaddr_in6 *)ss)->sin6_port); |
31b8006e SW |
1754 | } |
1755 | return 0; | |
1756 | } | |
1757 | ||
1758 | static void addr_set_port(struct sockaddr_storage *ss, int p) | |
1759 | { | |
1760 | switch (ss->ss_family) { | |
1761 | case AF_INET: | |
1762 | ((struct sockaddr_in *)ss)->sin_port = htons(p); | |
a2a79609 | 1763 | break; |
31b8006e SW |
1764 | case AF_INET6: |
1765 | ((struct sockaddr_in6 *)ss)->sin6_port = htons(p); | |
a2a79609 | 1766 | break; |
31b8006e SW |
1767 | } |
1768 | } | |
1769 | ||
ee3b56f2 NW |
1770 | /* |
1771 | * Unlike other *_pton function semantics, zero indicates success. | |
1772 | */ | |
1773 | static int ceph_pton(const char *str, size_t len, struct sockaddr_storage *ss, | |
1774 | char delim, const char **ipend) | |
1775 | { | |
99f0f3b2 AE |
1776 | struct sockaddr_in *in4 = (struct sockaddr_in *) ss; |
1777 | struct sockaddr_in6 *in6 = (struct sockaddr_in6 *) ss; | |
ee3b56f2 NW |
1778 | |
1779 | memset(ss, 0, sizeof(*ss)); | |
1780 | ||
1781 | if (in4_pton(str, len, (u8 *)&in4->sin_addr.s_addr, delim, ipend)) { | |
1782 | ss->ss_family = AF_INET; | |
1783 | return 0; | |
1784 | } | |
1785 | ||
1786 | if (in6_pton(str, len, (u8 *)&in6->sin6_addr.s6_addr, delim, ipend)) { | |
1787 | ss->ss_family = AF_INET6; | |
1788 | return 0; | |
1789 | } | |
1790 | ||
1791 | return -EINVAL; | |
1792 | } | |
1793 | ||
1794 | /* | |
1795 | * Extract hostname string and resolve using kernel DNS facility. | |
1796 | */ | |
1797 | #ifdef CONFIG_CEPH_LIB_USE_DNS_RESOLVER | |
1798 | static int ceph_dns_resolve_name(const char *name, size_t namelen, | |
1799 | struct sockaddr_storage *ss, char delim, const char **ipend) | |
1800 | { | |
1801 | const char *end, *delim_p; | |
1802 | char *colon_p, *ip_addr = NULL; | |
1803 | int ip_len, ret; | |
1804 | ||
1805 | /* | |
1806 | * The end of the hostname occurs immediately preceding the delimiter or | |
1807 | * the port marker (':') where the delimiter takes precedence. | |
1808 | */ | |
1809 | delim_p = memchr(name, delim, namelen); | |
1810 | colon_p = memchr(name, ':', namelen); | |
1811 | ||
1812 | if (delim_p && colon_p) | |
1813 | end = delim_p < colon_p ? delim_p : colon_p; | |
1814 | else if (!delim_p && colon_p) | |
1815 | end = colon_p; | |
1816 | else { | |
1817 | end = delim_p; | |
1818 | if (!end) /* case: hostname:/ */ | |
1819 | end = name + namelen; | |
1820 | } | |
1821 | ||
1822 | if (end <= name) | |
1823 | return -EINVAL; | |
1824 | ||
1825 | /* do dns_resolve upcall */ | |
1826 | ip_len = dns_query(NULL, name, end - name, NULL, &ip_addr, NULL); | |
1827 | if (ip_len > 0) | |
1828 | ret = ceph_pton(ip_addr, ip_len, ss, -1, NULL); | |
1829 | else | |
1830 | ret = -ESRCH; | |
1831 | ||
1832 | kfree(ip_addr); | |
1833 | ||
1834 | *ipend = end; | |
1835 | ||
1836 | pr_info("resolve '%.*s' (ret=%d): %s\n", (int)(end - name), name, | |
1837 | ret, ret ? "failed" : ceph_pr_addr(ss)); | |
1838 | ||
1839 | return ret; | |
1840 | } | |
1841 | #else | |
1842 | static inline int ceph_dns_resolve_name(const char *name, size_t namelen, | |
1843 | struct sockaddr_storage *ss, char delim, const char **ipend) | |
1844 | { | |
1845 | return -EINVAL; | |
1846 | } | |
1847 | #endif | |
1848 | ||
1849 | /* | |
1850 | * Parse a server name (IP or hostname). If a valid IP address is not found | |
1851 | * then try to extract a hostname to resolve using userspace DNS upcall. | |
1852 | */ | |
1853 | static int ceph_parse_server_name(const char *name, size_t namelen, | |
1854 | struct sockaddr_storage *ss, char delim, const char **ipend) | |
1855 | { | |
1856 | int ret; | |
1857 | ||
1858 | ret = ceph_pton(name, namelen, ss, delim, ipend); | |
1859 | if (ret) | |
1860 | ret = ceph_dns_resolve_name(name, namelen, ss, delim, ipend); | |
1861 | ||
1862 | return ret; | |
1863 | } | |
1864 | ||
31b8006e SW |
1865 | /* |
1866 | * Parse an ip[:port] list into an addr array. Use the default | |
1867 | * monitor port if a port isn't specified. | |
1868 | */ | |
1869 | int ceph_parse_ips(const char *c, const char *end, | |
1870 | struct ceph_entity_addr *addr, | |
1871 | int max_count, int *count) | |
1872 | { | |
ee3b56f2 | 1873 | int i, ret = -EINVAL; |
31b8006e SW |
1874 | const char *p = c; |
1875 | ||
1876 | dout("parse_ips on '%.*s'\n", (int)(end-c), c); | |
1877 | for (i = 0; i < max_count; i++) { | |
1878 | const char *ipend; | |
1879 | struct sockaddr_storage *ss = &addr[i].in_addr; | |
31b8006e | 1880 | int port; |
39139f64 SW |
1881 | char delim = ','; |
1882 | ||
1883 | if (*p == '[') { | |
1884 | delim = ']'; | |
1885 | p++; | |
1886 | } | |
31b8006e | 1887 | |
ee3b56f2 NW |
1888 | ret = ceph_parse_server_name(p, end - p, ss, delim, &ipend); |
1889 | if (ret) | |
31b8006e | 1890 | goto bad; |
ee3b56f2 NW |
1891 | ret = -EINVAL; |
1892 | ||
31b8006e SW |
1893 | p = ipend; |
1894 | ||
39139f64 SW |
1895 | if (delim == ']') { |
1896 | if (*p != ']') { | |
1897 | dout("missing matching ']'\n"); | |
1898 | goto bad; | |
1899 | } | |
1900 | p++; | |
1901 | } | |
1902 | ||
31b8006e SW |
1903 | /* port? */ |
1904 | if (p < end && *p == ':') { | |
1905 | port = 0; | |
1906 | p++; | |
1907 | while (p < end && *p >= '0' && *p <= '9') { | |
1908 | port = (port * 10) + (*p - '0'); | |
1909 | p++; | |
1910 | } | |
f48db1e9 ID |
1911 | if (port == 0) |
1912 | port = CEPH_MON_PORT; | |
1913 | else if (port > 65535) | |
31b8006e SW |
1914 | goto bad; |
1915 | } else { | |
1916 | port = CEPH_MON_PORT; | |
1917 | } | |
1918 | ||
1919 | addr_set_port(ss, port); | |
1920 | ||
3d14c5d2 | 1921 | dout("parse_ips got %s\n", ceph_pr_addr(ss)); |
31b8006e SW |
1922 | |
1923 | if (p == end) | |
1924 | break; | |
1925 | if (*p != ',') | |
1926 | goto bad; | |
1927 | p++; | |
1928 | } | |
1929 | ||
1930 | if (p != end) | |
1931 | goto bad; | |
1932 | ||
1933 | if (count) | |
1934 | *count = i + 1; | |
1935 | return 0; | |
1936 | ||
1937 | bad: | |
39139f64 | 1938 | pr_err("parse_ips bad ip '%.*s'\n", (int)(end - c), c); |
ee3b56f2 | 1939 | return ret; |
31b8006e | 1940 | } |
3d14c5d2 | 1941 | EXPORT_SYMBOL(ceph_parse_ips); |
31b8006e | 1942 | |
eed0ef2c | 1943 | static int process_banner(struct ceph_connection *con) |
31b8006e | 1944 | { |
eed0ef2c | 1945 | dout("process_banner on %p\n", con); |
31b8006e SW |
1946 | |
1947 | if (verify_hello(con) < 0) | |
1948 | return -1; | |
1949 | ||
63f2d211 SW |
1950 | ceph_decode_addr(&con->actual_peer_addr); |
1951 | ceph_decode_addr(&con->peer_addr_for_me); | |
1952 | ||
31b8006e SW |
1953 | /* |
1954 | * Make sure the other end is who we wanted. note that the other | |
1955 | * end may not yet know their ip address, so if it's 0.0.0.0, give | |
1956 | * them the benefit of the doubt. | |
1957 | */ | |
103e2d3a SW |
1958 | if (memcmp(&con->peer_addr, &con->actual_peer_addr, |
1959 | sizeof(con->peer_addr)) != 0 && | |
31b8006e SW |
1960 | !(addr_is_blank(&con->actual_peer_addr.in_addr) && |
1961 | con->actual_peer_addr.nonce == con->peer_addr.nonce)) { | |
b9a67899 JP |
1962 | pr_warn("wrong peer, want %s/%d, got %s/%d\n", |
1963 | ceph_pr_addr(&con->peer_addr.in_addr), | |
1964 | (int)le32_to_cpu(con->peer_addr.nonce), | |
1965 | ceph_pr_addr(&con->actual_peer_addr.in_addr), | |
1966 | (int)le32_to_cpu(con->actual_peer_addr.nonce)); | |
58bb3b37 | 1967 | con->error_msg = "wrong peer at address"; |
31b8006e SW |
1968 | return -1; |
1969 | } | |
1970 | ||
1971 | /* | |
1972 | * did we learn our address? | |
1973 | */ | |
1974 | if (addr_is_blank(&con->msgr->inst.addr.in_addr)) { | |
1975 | int port = addr_port(&con->msgr->inst.addr.in_addr); | |
1976 | ||
1977 | memcpy(&con->msgr->inst.addr.in_addr, | |
1978 | &con->peer_addr_for_me.in_addr, | |
1979 | sizeof(con->peer_addr_for_me.in_addr)); | |
1980 | addr_set_port(&con->msgr->inst.addr.in_addr, port); | |
63f2d211 | 1981 | encode_my_addr(con->msgr); |
eed0ef2c | 1982 | dout("process_banner learned my addr is %s\n", |
3d14c5d2 | 1983 | ceph_pr_addr(&con->msgr->inst.addr.in_addr)); |
31b8006e SW |
1984 | } |
1985 | ||
eed0ef2c SW |
1986 | return 0; |
1987 | } | |
1988 | ||
1989 | static int process_connect(struct ceph_connection *con) | |
1990 | { | |
3d14c5d2 YS |
1991 | u64 sup_feat = con->msgr->supported_features; |
1992 | u64 req_feat = con->msgr->required_features; | |
2b3e0c90 ID |
1993 | u64 server_feat = ceph_sanitize_features( |
1994 | le64_to_cpu(con->in_reply.features)); | |
0da5d703 | 1995 | int ret; |
04a419f9 | 1996 | |
eed0ef2c SW |
1997 | dout("process_connect on %p tag %d\n", con, (int)con->in_tag); |
1998 | ||
31b8006e | 1999 | switch (con->in_reply.tag) { |
04a419f9 SW |
2000 | case CEPH_MSGR_TAG_FEATURES: |
2001 | pr_err("%s%lld %s feature set mismatch," | |
2002 | " my %llx < server's %llx, missing %llx\n", | |
2003 | ENTITY_NAME(con->peer_name), | |
3d14c5d2 | 2004 | ceph_pr_addr(&con->peer_addr.in_addr), |
04a419f9 SW |
2005 | sup_feat, server_feat, server_feat & ~sup_feat); |
2006 | con->error_msg = "missing required protocol features"; | |
0fa6ebc6 | 2007 | reset_connection(con); |
04a419f9 SW |
2008 | return -1; |
2009 | ||
31b8006e | 2010 | case CEPH_MSGR_TAG_BADPROTOVER: |
31b8006e SW |
2011 | pr_err("%s%lld %s protocol version mismatch," |
2012 | " my %d != server's %d\n", | |
2013 | ENTITY_NAME(con->peer_name), | |
3d14c5d2 | 2014 | ceph_pr_addr(&con->peer_addr.in_addr), |
31b8006e SW |
2015 | le32_to_cpu(con->out_connect.protocol_version), |
2016 | le32_to_cpu(con->in_reply.protocol_version)); | |
2017 | con->error_msg = "protocol version mismatch"; | |
0fa6ebc6 | 2018 | reset_connection(con); |
31b8006e SW |
2019 | return -1; |
2020 | ||
4e7a5dcd SW |
2021 | case CEPH_MSGR_TAG_BADAUTHORIZER: |
2022 | con->auth_retry++; | |
2023 | dout("process_connect %p got BADAUTHORIZER attempt %d\n", con, | |
2024 | con->auth_retry); | |
2025 | if (con->auth_retry == 2) { | |
2026 | con->error_msg = "connect authorization failure"; | |
4e7a5dcd SW |
2027 | return -1; |
2028 | } | |
6d4221b5 | 2029 | con_out_kvec_reset(con); |
e825a66d | 2030 | ret = prepare_write_connect(con); |
0da5d703 SW |
2031 | if (ret < 0) |
2032 | return ret; | |
63733a0f | 2033 | prepare_read_connect(con); |
4e7a5dcd | 2034 | break; |
31b8006e SW |
2035 | |
2036 | case CEPH_MSGR_TAG_RESETSESSION: | |
2037 | /* | |
2038 | * If we connected with a large connect_seq but the peer | |
2039 | * has no record of a session with us (no connection, or | |
2040 | * connect_seq == 0), they will send RESETSESION to indicate | |
2041 | * that they must have reset their session, and may have | |
2042 | * dropped messages. | |
2043 | */ | |
2044 | dout("process_connect got RESET peer seq %u\n", | |
5bdca4e0 | 2045 | le32_to_cpu(con->in_reply.connect_seq)); |
31b8006e SW |
2046 | pr_err("%s%lld %s connection reset\n", |
2047 | ENTITY_NAME(con->peer_name), | |
3d14c5d2 | 2048 | ceph_pr_addr(&con->peer_addr.in_addr)); |
31b8006e | 2049 | reset_connection(con); |
6d4221b5 | 2050 | con_out_kvec_reset(con); |
5a0f8fdd AE |
2051 | ret = prepare_write_connect(con); |
2052 | if (ret < 0) | |
2053 | return ret; | |
31b8006e SW |
2054 | prepare_read_connect(con); |
2055 | ||
2056 | /* Tell ceph about it. */ | |
ec302645 | 2057 | mutex_unlock(&con->mutex); |
31b8006e SW |
2058 | pr_info("reset on %s%lld\n", ENTITY_NAME(con->peer_name)); |
2059 | if (con->ops->peer_reset) | |
2060 | con->ops->peer_reset(con); | |
ec302645 | 2061 | mutex_lock(&con->mutex); |
8dacc7da | 2062 | if (con->state != CON_STATE_NEGOTIATING) |
0da5d703 | 2063 | return -EAGAIN; |
31b8006e SW |
2064 | break; |
2065 | ||
2066 | case CEPH_MSGR_TAG_RETRY_SESSION: | |
2067 | /* | |
2068 | * If we sent a smaller connect_seq than the peer has, try | |
2069 | * again with a larger value. | |
2070 | */ | |
5bdca4e0 | 2071 | dout("process_connect got RETRY_SESSION my seq %u, peer %u\n", |
31b8006e | 2072 | le32_to_cpu(con->out_connect.connect_seq), |
5bdca4e0 SW |
2073 | le32_to_cpu(con->in_reply.connect_seq)); |
2074 | con->connect_seq = le32_to_cpu(con->in_reply.connect_seq); | |
6d4221b5 | 2075 | con_out_kvec_reset(con); |
5a0f8fdd AE |
2076 | ret = prepare_write_connect(con); |
2077 | if (ret < 0) | |
2078 | return ret; | |
31b8006e SW |
2079 | prepare_read_connect(con); |
2080 | break; | |
2081 | ||
2082 | case CEPH_MSGR_TAG_RETRY_GLOBAL: | |
2083 | /* | |
2084 | * If we sent a smaller global_seq than the peer has, try | |
2085 | * again with a larger value. | |
2086 | */ | |
eed0ef2c | 2087 | dout("process_connect got RETRY_GLOBAL my %u peer_gseq %u\n", |
31b8006e | 2088 | con->peer_global_seq, |
5bdca4e0 | 2089 | le32_to_cpu(con->in_reply.global_seq)); |
31b8006e | 2090 | get_global_seq(con->msgr, |
5bdca4e0 | 2091 | le32_to_cpu(con->in_reply.global_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 | ||
3a23083b | 2099 | case CEPH_MSGR_TAG_SEQ: |
31b8006e | 2100 | case CEPH_MSGR_TAG_READY: |
04a419f9 SW |
2101 | if (req_feat & ~server_feat) { |
2102 | pr_err("%s%lld %s protocol feature mismatch," | |
2103 | " my required %llx > server's %llx, need %llx\n", | |
2104 | ENTITY_NAME(con->peer_name), | |
3d14c5d2 | 2105 | ceph_pr_addr(&con->peer_addr.in_addr), |
04a419f9 SW |
2106 | req_feat, server_feat, req_feat & ~server_feat); |
2107 | con->error_msg = "missing required protocol features"; | |
0fa6ebc6 | 2108 | reset_connection(con); |
04a419f9 SW |
2109 | return -1; |
2110 | } | |
8dacc7da | 2111 | |
122070a2 | 2112 | WARN_ON(con->state != CON_STATE_NEGOTIATING); |
8dacc7da | 2113 | con->state = CON_STATE_OPEN; |
20e55c4c | 2114 | con->auth_retry = 0; /* we authenticated; clear flag */ |
31b8006e SW |
2115 | con->peer_global_seq = le32_to_cpu(con->in_reply.global_seq); |
2116 | con->connect_seq++; | |
aba558e2 | 2117 | con->peer_features = server_feat; |
31b8006e SW |
2118 | dout("process_connect got READY gseq %d cseq %d (%d)\n", |
2119 | con->peer_global_seq, | |
2120 | le32_to_cpu(con->in_reply.connect_seq), | |
2121 | con->connect_seq); | |
2122 | WARN_ON(con->connect_seq != | |
2123 | le32_to_cpu(con->in_reply.connect_seq)); | |
92ac41d0 SW |
2124 | |
2125 | if (con->in_reply.flags & CEPH_MSG_CONNECT_LOSSY) | |
c9ffc77a | 2126 | con_flag_set(con, CON_FLAG_LOSSYTX); |
92ac41d0 | 2127 | |
85effe18 | 2128 | con->delay = 0; /* reset backoff memory */ |
92ac41d0 | 2129 | |
3a23083b SW |
2130 | if (con->in_reply.tag == CEPH_MSGR_TAG_SEQ) { |
2131 | prepare_write_seq(con); | |
2132 | prepare_read_seq(con); | |
2133 | } else { | |
2134 | prepare_read_tag(con); | |
2135 | } | |
31b8006e SW |
2136 | break; |
2137 | ||
2138 | case CEPH_MSGR_TAG_WAIT: | |
2139 | /* | |
2140 | * If there is a connection race (we are opening | |
2141 | * connections to each other), one of us may just have | |
2142 | * to WAIT. This shouldn't happen if we are the | |
2143 | * client. | |
2144 | */ | |
04177882 SW |
2145 | con->error_msg = "protocol error, got WAIT as client"; |
2146 | return -1; | |
31b8006e SW |
2147 | |
2148 | default: | |
31b8006e SW |
2149 | con->error_msg = "protocol error, garbage tag during connect"; |
2150 | return -1; | |
2151 | } | |
2152 | return 0; | |
2153 | } | |
2154 | ||
2155 | ||
2156 | /* | |
2157 | * read (part of) an ack | |
2158 | */ | |
2159 | static int read_partial_ack(struct ceph_connection *con) | |
2160 | { | |
fd51653f AE |
2161 | int size = sizeof (con->in_temp_ack); |
2162 | int end = size; | |
31b8006e | 2163 | |
fd51653f | 2164 | return read_partial(con, end, size, &con->in_temp_ack); |
31b8006e SW |
2165 | } |
2166 | ||
31b8006e SW |
2167 | /* |
2168 | * We can finally discard anything that's been acked. | |
2169 | */ | |
2170 | static void process_ack(struct ceph_connection *con) | |
2171 | { | |
2172 | struct ceph_msg *m; | |
2173 | u64 ack = le64_to_cpu(con->in_temp_ack); | |
2174 | u64 seq; | |
2175 | ||
31b8006e SW |
2176 | while (!list_empty(&con->out_sent)) { |
2177 | m = list_first_entry(&con->out_sent, struct ceph_msg, | |
2178 | list_head); | |
2179 | seq = le64_to_cpu(m->hdr.seq); | |
2180 | if (seq > ack) | |
2181 | break; | |
2182 | dout("got ack for seq %llu type %d at %p\n", seq, | |
2183 | le16_to_cpu(m->hdr.type), m); | |
4cf9d544 | 2184 | m->ack_stamp = jiffies; |
31b8006e SW |
2185 | ceph_msg_remove(m); |
2186 | } | |
31b8006e SW |
2187 | prepare_read_tag(con); |
2188 | } | |
2189 | ||
2190 | ||
2450418c | 2191 | static int read_partial_message_section(struct ceph_connection *con, |
213c99ee SW |
2192 | struct kvec *section, |
2193 | unsigned int sec_len, u32 *crc) | |
2450418c | 2194 | { |
68b4476b | 2195 | int ret, left; |
2450418c YS |
2196 | |
2197 | BUG_ON(!section); | |
2198 | ||
2199 | while (section->iov_len < sec_len) { | |
2200 | BUG_ON(section->iov_base == NULL); | |
2201 | left = sec_len - section->iov_len; | |
2202 | ret = ceph_tcp_recvmsg(con->sock, (char *)section->iov_base + | |
2203 | section->iov_len, left); | |
2204 | if (ret <= 0) | |
2205 | return ret; | |
2206 | section->iov_len += ret; | |
2450418c | 2207 | } |
fe3ad593 AE |
2208 | if (section->iov_len == sec_len) |
2209 | *crc = crc32c(0, section->iov_base, section->iov_len); | |
31b8006e | 2210 | |
2450418c YS |
2211 | return 1; |
2212 | } | |
31b8006e | 2213 | |
34d2d200 AE |
2214 | static int read_partial_msg_data(struct ceph_connection *con) |
2215 | { | |
2216 | struct ceph_msg *msg = con->in_msg; | |
8ae4f4f5 | 2217 | struct ceph_msg_data_cursor *cursor = &msg->cursor; |
34d2d200 | 2218 | const bool do_datacrc = !con->msgr->nocrc; |
686be208 AE |
2219 | struct page *page; |
2220 | size_t page_offset; | |
2221 | size_t length; | |
f5db90bc | 2222 | u32 crc = 0; |
34d2d200 AE |
2223 | int ret; |
2224 | ||
2225 | BUG_ON(!msg); | |
5240d9f9 | 2226 | if (list_empty(&msg->data)) |
4c59b4a2 | 2227 | return -EIO; |
34d2d200 | 2228 | |
f5db90bc AE |
2229 | if (do_datacrc) |
2230 | crc = con->in_data_crc; | |
643c68a4 | 2231 | while (cursor->resid) { |
8ae4f4f5 | 2232 | page = ceph_msg_data_next(&msg->cursor, &page_offset, &length, |
4c59b4a2 | 2233 | NULL); |
686be208 | 2234 | ret = ceph_tcp_recvpage(con->sock, page, page_offset, length); |
f5db90bc AE |
2235 | if (ret <= 0) { |
2236 | if (do_datacrc) | |
2237 | con->in_data_crc = crc; | |
2238 | ||
686be208 | 2239 | return ret; |
f5db90bc | 2240 | } |
686be208 AE |
2241 | |
2242 | if (do_datacrc) | |
f5db90bc | 2243 | crc = ceph_crc32c_page(crc, page, page_offset, ret); |
8ae4f4f5 | 2244 | (void) ceph_msg_data_advance(&msg->cursor, (size_t)ret); |
34d2d200 | 2245 | } |
f5db90bc AE |
2246 | if (do_datacrc) |
2247 | con->in_data_crc = crc; | |
34d2d200 AE |
2248 | |
2249 | return 1; /* must return > 0 to indicate success */ | |
2250 | } | |
2251 | ||
31b8006e SW |
2252 | /* |
2253 | * read (part of) a message. | |
2254 | */ | |
686be208 AE |
2255 | static int ceph_con_in_msg_alloc(struct ceph_connection *con, int *skip); |
2256 | ||
31b8006e SW |
2257 | static int read_partial_message(struct ceph_connection *con) |
2258 | { | |
2259 | struct ceph_msg *m = con->in_msg; | |
fd51653f AE |
2260 | int size; |
2261 | int end; | |
31b8006e | 2262 | int ret; |
95c96174 | 2263 | unsigned int front_len, middle_len, data_len; |
37675b0f | 2264 | bool do_datacrc = !con->msgr->nocrc; |
33d07337 | 2265 | bool need_sign = (con->peer_features & CEPH_FEATURE_MSG_AUTH); |
ae18756b | 2266 | u64 seq; |
fe3ad593 | 2267 | u32 crc; |
31b8006e SW |
2268 | |
2269 | dout("read_partial_message con %p msg %p\n", con, m); | |
2270 | ||
2271 | /* header */ | |
fd51653f AE |
2272 | size = sizeof (con->in_hdr); |
2273 | end = size; | |
2274 | ret = read_partial(con, end, size, &con->in_hdr); | |
57dac9d1 AE |
2275 | if (ret <= 0) |
2276 | return ret; | |
fe3ad593 AE |
2277 | |
2278 | crc = crc32c(0, &con->in_hdr, offsetof(struct ceph_msg_header, crc)); | |
2279 | if (cpu_to_le32(crc) != con->in_hdr.crc) { | |
67c64eb7 | 2280 | pr_err("read_partial_message bad hdr crc %u != expected %u\n", |
fe3ad593 AE |
2281 | crc, con->in_hdr.crc); |
2282 | return -EBADMSG; | |
2283 | } | |
2284 | ||
31b8006e SW |
2285 | front_len = le32_to_cpu(con->in_hdr.front_len); |
2286 | if (front_len > CEPH_MSG_MAX_FRONT_LEN) | |
2287 | return -EIO; | |
2288 | middle_len = le32_to_cpu(con->in_hdr.middle_len); | |
7b11ba37 | 2289 | if (middle_len > CEPH_MSG_MAX_MIDDLE_LEN) |
31b8006e SW |
2290 | return -EIO; |
2291 | data_len = le32_to_cpu(con->in_hdr.data_len); | |
2292 | if (data_len > CEPH_MSG_MAX_DATA_LEN) | |
2293 | return -EIO; | |
2294 | ||
ae18756b SW |
2295 | /* verify seq# */ |
2296 | seq = le64_to_cpu(con->in_hdr.seq); | |
2297 | if ((s64)seq - (s64)con->in_seq < 1) { | |
df9f86fa | 2298 | pr_info("skipping %s%lld %s seq %lld expected %lld\n", |
ae18756b | 2299 | ENTITY_NAME(con->peer_name), |
3d14c5d2 | 2300 | ceph_pr_addr(&con->peer_addr.in_addr), |
ae18756b SW |
2301 | seq, con->in_seq + 1); |
2302 | con->in_base_pos = -front_len - middle_len - data_len - | |
2303 | sizeof(m->footer); | |
2304 | con->in_tag = CEPH_MSGR_TAG_READY; | |
ae18756b SW |
2305 | return 0; |
2306 | } else if ((s64)seq - (s64)con->in_seq > 1) { | |
2307 | pr_err("read_partial_message bad seq %lld expected %lld\n", | |
2308 | seq, con->in_seq + 1); | |
2309 | con->error_msg = "bad message sequence # for incoming message"; | |
67c64eb7 | 2310 | return -EBADE; |
ae18756b SW |
2311 | } |
2312 | ||
31b8006e SW |
2313 | /* allocate message? */ |
2314 | if (!con->in_msg) { | |
4740a623 SW |
2315 | int skip = 0; |
2316 | ||
31b8006e | 2317 | dout("got hdr type %d front %d data %d\n", con->in_hdr.type, |
6ebc8b32 | 2318 | front_len, data_len); |
4740a623 SW |
2319 | ret = ceph_con_in_msg_alloc(con, &skip); |
2320 | if (ret < 0) | |
2321 | return ret; | |
f759ebb9 AE |
2322 | |
2323 | BUG_ON(!con->in_msg ^ skip); | |
2324 | if (con->in_msg && data_len > con->in_msg->data_length) { | |
b9a67899 | 2325 | pr_warn("%s skipping long message (%u > %zd)\n", |
f759ebb9 AE |
2326 | __func__, data_len, con->in_msg->data_length); |
2327 | ceph_msg_put(con->in_msg); | |
2328 | con->in_msg = NULL; | |
2329 | skip = 1; | |
2330 | } | |
2450418c | 2331 | if (skip) { |
31b8006e | 2332 | /* skip this message */ |
a79832f2 | 2333 | dout("alloc_msg said skip message\n"); |
31b8006e SW |
2334 | con->in_base_pos = -front_len - middle_len - data_len - |
2335 | sizeof(m->footer); | |
2336 | con->in_tag = CEPH_MSGR_TAG_READY; | |
684be25c | 2337 | con->in_seq++; |
31b8006e SW |
2338 | return 0; |
2339 | } | |
38941f80 | 2340 | |
4740a623 | 2341 | BUG_ON(!con->in_msg); |
38941f80 | 2342 | BUG_ON(con->in_msg->con != con); |
31b8006e SW |
2343 | m = con->in_msg; |
2344 | m->front.iov_len = 0; /* haven't read it yet */ | |
2450418c YS |
2345 | if (m->middle) |
2346 | m->middle->vec.iov_len = 0; | |
9d7f0f13 | 2347 | |
78625051 | 2348 | /* prepare for data payload, if any */ |
a4107026 | 2349 | |
78625051 | 2350 | if (data_len) |
98fa5dd8 | 2351 | prepare_message_data(con->in_msg, data_len); |
31b8006e SW |
2352 | } |
2353 | ||
2354 | /* front */ | |
2450418c YS |
2355 | ret = read_partial_message_section(con, &m->front, front_len, |
2356 | &con->in_front_crc); | |
2357 | if (ret <= 0) | |
2358 | return ret; | |
31b8006e SW |
2359 | |
2360 | /* middle */ | |
2450418c | 2361 | if (m->middle) { |
213c99ee SW |
2362 | ret = read_partial_message_section(con, &m->middle->vec, |
2363 | middle_len, | |
2450418c | 2364 | &con->in_middle_crc); |
31b8006e SW |
2365 | if (ret <= 0) |
2366 | return ret; | |
31b8006e SW |
2367 | } |
2368 | ||
2369 | /* (page) data */ | |
34d2d200 AE |
2370 | if (data_len) { |
2371 | ret = read_partial_msg_data(con); | |
2372 | if (ret <= 0) | |
2373 | return ret; | |
31b8006e SW |
2374 | } |
2375 | ||
31b8006e | 2376 | /* footer */ |
33d07337 YZ |
2377 | if (need_sign) |
2378 | size = sizeof(m->footer); | |
2379 | else | |
2380 | size = sizeof(m->old_footer); | |
2381 | ||
fd51653f AE |
2382 | end += size; |
2383 | ret = read_partial(con, end, size, &m->footer); | |
57dac9d1 AE |
2384 | if (ret <= 0) |
2385 | return ret; | |
2386 | ||
33d07337 YZ |
2387 | if (!need_sign) { |
2388 | m->footer.flags = m->old_footer.flags; | |
2389 | m->footer.sig = 0; | |
2390 | } | |
2391 | ||
31b8006e SW |
2392 | dout("read_partial_message got msg %p %d (%u) + %d (%u) + %d (%u)\n", |
2393 | m, front_len, m->footer.front_crc, middle_len, | |
2394 | m->footer.middle_crc, data_len, m->footer.data_crc); | |
2395 | ||
2396 | /* crc ok? */ | |
2397 | if (con->in_front_crc != le32_to_cpu(m->footer.front_crc)) { | |
2398 | pr_err("read_partial_message %p front crc %u != exp. %u\n", | |
2399 | m, con->in_front_crc, m->footer.front_crc); | |
2400 | return -EBADMSG; | |
2401 | } | |
2402 | if (con->in_middle_crc != le32_to_cpu(m->footer.middle_crc)) { | |
2403 | pr_err("read_partial_message %p middle crc %u != exp %u\n", | |
2404 | m, con->in_middle_crc, m->footer.middle_crc); | |
2405 | return -EBADMSG; | |
2406 | } | |
bca064d2 | 2407 | if (do_datacrc && |
31b8006e SW |
2408 | (m->footer.flags & CEPH_MSG_FOOTER_NOCRC) == 0 && |
2409 | con->in_data_crc != le32_to_cpu(m->footer.data_crc)) { | |
2410 | pr_err("read_partial_message %p data crc %u != exp. %u\n", m, | |
2411 | con->in_data_crc, le32_to_cpu(m->footer.data_crc)); | |
2412 | return -EBADMSG; | |
2413 | } | |
2414 | ||
33d07337 YZ |
2415 | if (need_sign && con->ops->check_message_signature && |
2416 | con->ops->check_message_signature(con, m)) { | |
2417 | pr_err("read_partial_message %p signature check failed\n", m); | |
2418 | return -EBADMSG; | |
2419 | } | |
2420 | ||
31b8006e SW |
2421 | return 1; /* done! */ |
2422 | } | |
2423 | ||
2424 | /* | |
2425 | * Process message. This happens in the worker thread. The callback should | |
2426 | * be careful not to do anything that waits on other incoming messages or it | |
2427 | * may deadlock. | |
2428 | */ | |
2429 | static void process_message(struct ceph_connection *con) | |
2430 | { | |
5e095e8b | 2431 | struct ceph_msg *msg; |
31b8006e | 2432 | |
38941f80 AE |
2433 | BUG_ON(con->in_msg->con != con); |
2434 | con->in_msg->con = NULL; | |
5e095e8b | 2435 | msg = con->in_msg; |
31b8006e | 2436 | con->in_msg = NULL; |
36eb71aa | 2437 | con->ops->put(con); |
31b8006e SW |
2438 | |
2439 | /* if first message, set peer_name */ | |
2440 | if (con->peer_name.type == 0) | |
dbad185d | 2441 | con->peer_name = msg->hdr.src; |
31b8006e | 2442 | |
31b8006e | 2443 | con->in_seq++; |
ec302645 | 2444 | mutex_unlock(&con->mutex); |
31b8006e SW |
2445 | |
2446 | dout("===== %p %llu from %s%lld %d=%s len %d+%d (%u %u %u) =====\n", | |
2447 | msg, le64_to_cpu(msg->hdr.seq), | |
dbad185d | 2448 | ENTITY_NAME(msg->hdr.src), |
31b8006e SW |
2449 | le16_to_cpu(msg->hdr.type), |
2450 | ceph_msg_type_name(le16_to_cpu(msg->hdr.type)), | |
2451 | le32_to_cpu(msg->hdr.front_len), | |
2452 | le32_to_cpu(msg->hdr.data_len), | |
2453 | con->in_front_crc, con->in_middle_crc, con->in_data_crc); | |
2454 | con->ops->dispatch(con, msg); | |
ec302645 SW |
2455 | |
2456 | mutex_lock(&con->mutex); | |
31b8006e SW |
2457 | } |
2458 | ||
2459 | ||
2460 | /* | |
2461 | * Write something to the socket. Called in a worker thread when the | |
2462 | * socket appears to be writeable and we have something ready to send. | |
2463 | */ | |
2464 | static int try_write(struct ceph_connection *con) | |
2465 | { | |
31b8006e SW |
2466 | int ret = 1; |
2467 | ||
d59315ca | 2468 | dout("try_write start %p state %lu\n", con, con->state); |
31b8006e | 2469 | |
31b8006e SW |
2470 | more: |
2471 | dout("try_write out_kvec_bytes %d\n", con->out_kvec_bytes); | |
2472 | ||
2473 | /* open the socket first? */ | |
8dacc7da SW |
2474 | if (con->state == CON_STATE_PREOPEN) { |
2475 | BUG_ON(con->sock); | |
2476 | con->state = CON_STATE_CONNECTING; | |
a5988c49 | 2477 | |
e2200423 | 2478 | con_out_kvec_reset(con); |
e825a66d | 2479 | prepare_write_banner(con); |
eed0ef2c | 2480 | prepare_read_banner(con); |
31b8006e | 2481 | |
cf3e5c40 | 2482 | BUG_ON(con->in_msg); |
31b8006e SW |
2483 | con->in_tag = CEPH_MSGR_TAG_READY; |
2484 | dout("try_write initiating connect on %p new state %lu\n", | |
2485 | con, con->state); | |
41617d0c AE |
2486 | ret = ceph_tcp_connect(con); |
2487 | if (ret < 0) { | |
31b8006e | 2488 | con->error_msg = "connect error"; |
31b8006e SW |
2489 | goto out; |
2490 | } | |
2491 | } | |
2492 | ||
2493 | more_kvec: | |
2494 | /* kvec data queued? */ | |
2495 | if (con->out_skip) { | |
2496 | ret = write_partial_skip(con); | |
2497 | if (ret <= 0) | |
42961d23 | 2498 | goto out; |
31b8006e SW |
2499 | } |
2500 | if (con->out_kvec_left) { | |
2501 | ret = write_partial_kvec(con); | |
2502 | if (ret <= 0) | |
42961d23 | 2503 | goto out; |
31b8006e SW |
2504 | } |
2505 | ||
2506 | /* msg pages? */ | |
2507 | if (con->out_msg) { | |
c86a2930 SW |
2508 | if (con->out_msg_done) { |
2509 | ceph_msg_put(con->out_msg); | |
2510 | con->out_msg = NULL; /* we're done with this one */ | |
2511 | goto do_next; | |
2512 | } | |
2513 | ||
34d2d200 | 2514 | ret = write_partial_message_data(con); |
31b8006e SW |
2515 | if (ret == 1) |
2516 | goto more_kvec; /* we need to send the footer, too! */ | |
2517 | if (ret == 0) | |
42961d23 | 2518 | goto out; |
31b8006e | 2519 | if (ret < 0) { |
34d2d200 | 2520 | dout("try_write write_partial_message_data err %d\n", |
31b8006e | 2521 | ret); |
42961d23 | 2522 | goto out; |
31b8006e SW |
2523 | } |
2524 | } | |
2525 | ||
c86a2930 | 2526 | do_next: |
8dacc7da | 2527 | if (con->state == CON_STATE_OPEN) { |
31b8006e SW |
2528 | /* is anything else pending? */ |
2529 | if (!list_empty(&con->out_queue)) { | |
2530 | prepare_write_message(con); | |
2531 | goto more; | |
2532 | } | |
2533 | if (con->in_seq > con->in_seq_acked) { | |
2534 | prepare_write_ack(con); | |
2535 | goto more; | |
2536 | } | |
c9ffc77a | 2537 | if (con_flag_test_and_clear(con, CON_FLAG_KEEPALIVE_PENDING)) { |
31b8006e SW |
2538 | prepare_write_keepalive(con); |
2539 | goto more; | |
2540 | } | |
2541 | } | |
2542 | ||
2543 | /* Nothing to do! */ | |
c9ffc77a | 2544 | con_flag_clear(con, CON_FLAG_WRITE_PENDING); |
31b8006e | 2545 | dout("try_write nothing else to write.\n"); |
31b8006e SW |
2546 | ret = 0; |
2547 | out: | |
42961d23 | 2548 | dout("try_write done on %p ret %d\n", con, ret); |
31b8006e SW |
2549 | return ret; |
2550 | } | |
2551 | ||
2552 | ||
2553 | ||
2554 | /* | |
2555 | * Read what we can from the socket. | |
2556 | */ | |
2557 | static int try_read(struct ceph_connection *con) | |
2558 | { | |
31b8006e SW |
2559 | int ret = -1; |
2560 | ||
8dacc7da SW |
2561 | more: |
2562 | dout("try_read start on %p state %lu\n", con, con->state); | |
2563 | if (con->state != CON_STATE_CONNECTING && | |
2564 | con->state != CON_STATE_NEGOTIATING && | |
2565 | con->state != CON_STATE_OPEN) | |
31b8006e SW |
2566 | return 0; |
2567 | ||
8dacc7da | 2568 | BUG_ON(!con->sock); |
ec302645 | 2569 | |
31b8006e SW |
2570 | dout("try_read tag %d in_base_pos %d\n", (int)con->in_tag, |
2571 | con->in_base_pos); | |
0da5d703 | 2572 | |
8dacc7da | 2573 | if (con->state == CON_STATE_CONNECTING) { |
7593af92 AE |
2574 | dout("try_read connecting\n"); |
2575 | ret = read_partial_banner(con); | |
2576 | if (ret <= 0) | |
ab166d5a | 2577 | goto out; |
7593af92 AE |
2578 | ret = process_banner(con); |
2579 | if (ret < 0) | |
2580 | goto out; | |
2581 | ||
8dacc7da | 2582 | con->state = CON_STATE_NEGOTIATING; |
7593af92 | 2583 | |
6d4221b5 JS |
2584 | /* |
2585 | * Received banner is good, exchange connection info. | |
2586 | * Do not reset out_kvec, as sending our banner raced | |
2587 | * with receiving peer banner after connect completed. | |
2588 | */ | |
7593af92 AE |
2589 | ret = prepare_write_connect(con); |
2590 | if (ret < 0) | |
2591 | goto out; | |
2592 | prepare_read_connect(con); | |
2593 | ||
2594 | /* Send connection info before awaiting response */ | |
0da5d703 SW |
2595 | goto out; |
2596 | } | |
2597 | ||
8dacc7da | 2598 | if (con->state == CON_STATE_NEGOTIATING) { |
7593af92 | 2599 | dout("try_read negotiating\n"); |
31b8006e SW |
2600 | ret = read_partial_connect(con); |
2601 | if (ret <= 0) | |
31b8006e | 2602 | goto out; |
98bdb0aa SW |
2603 | ret = process_connect(con); |
2604 | if (ret < 0) | |
2605 | goto out; | |
31b8006e SW |
2606 | goto more; |
2607 | } | |
2608 | ||
122070a2 | 2609 | WARN_ON(con->state != CON_STATE_OPEN); |
8dacc7da | 2610 | |
31b8006e SW |
2611 | if (con->in_base_pos < 0) { |
2612 | /* | |
2613 | * skipping + discarding content. | |
2614 | * | |
2615 | * FIXME: there must be a better way to do this! | |
2616 | */ | |
84495f49 AE |
2617 | static char buf[SKIP_BUF_SIZE]; |
2618 | int skip = min((int) sizeof (buf), -con->in_base_pos); | |
2619 | ||
31b8006e SW |
2620 | dout("skipping %d / %d bytes\n", skip, -con->in_base_pos); |
2621 | ret = ceph_tcp_recvmsg(con->sock, buf, skip); | |
2622 | if (ret <= 0) | |
98bdb0aa | 2623 | goto out; |
31b8006e SW |
2624 | con->in_base_pos += ret; |
2625 | if (con->in_base_pos) | |
2626 | goto more; | |
2627 | } | |
2628 | if (con->in_tag == CEPH_MSGR_TAG_READY) { | |
2629 | /* | |
2630 | * what's next? | |
2631 | */ | |
2632 | ret = ceph_tcp_recvmsg(con->sock, &con->in_tag, 1); | |
2633 | if (ret <= 0) | |
98bdb0aa | 2634 | goto out; |
31b8006e SW |
2635 | dout("try_read got tag %d\n", (int)con->in_tag); |
2636 | switch (con->in_tag) { | |
2637 | case CEPH_MSGR_TAG_MSG: | |
2638 | prepare_read_message(con); | |
2639 | break; | |
2640 | case CEPH_MSGR_TAG_ACK: | |
2641 | prepare_read_ack(con); | |
2642 | break; | |
2643 | case CEPH_MSGR_TAG_CLOSE: | |
8dacc7da SW |
2644 | con_close_socket(con); |
2645 | con->state = CON_STATE_CLOSED; | |
98bdb0aa | 2646 | goto out; |
31b8006e SW |
2647 | default: |
2648 | goto bad_tag; | |
2649 | } | |
2650 | } | |
2651 | if (con->in_tag == CEPH_MSGR_TAG_MSG) { | |
2652 | ret = read_partial_message(con); | |
2653 | if (ret <= 0) { | |
2654 | switch (ret) { | |
2655 | case -EBADMSG: | |
2656 | con->error_msg = "bad crc"; | |
67c64eb7 ID |
2657 | /* fall through */ |
2658 | case -EBADE: | |
31b8006e | 2659 | ret = -EIO; |
98bdb0aa | 2660 | break; |
31b8006e SW |
2661 | case -EIO: |
2662 | con->error_msg = "io error"; | |
98bdb0aa | 2663 | break; |
31b8006e | 2664 | } |
98bdb0aa | 2665 | goto out; |
31b8006e SW |
2666 | } |
2667 | if (con->in_tag == CEPH_MSGR_TAG_READY) | |
2668 | goto more; | |
2669 | process_message(con); | |
7b862e07 SW |
2670 | if (con->state == CON_STATE_OPEN) |
2671 | prepare_read_tag(con); | |
31b8006e SW |
2672 | goto more; |
2673 | } | |
3a23083b SW |
2674 | if (con->in_tag == CEPH_MSGR_TAG_ACK || |
2675 | con->in_tag == CEPH_MSGR_TAG_SEQ) { | |
2676 | /* | |
2677 | * the final handshake seq exchange is semantically | |
2678 | * equivalent to an ACK | |
2679 | */ | |
31b8006e SW |
2680 | ret = read_partial_ack(con); |
2681 | if (ret <= 0) | |
98bdb0aa | 2682 | goto out; |
31b8006e SW |
2683 | process_ack(con); |
2684 | goto more; | |
2685 | } | |
2686 | ||
31b8006e | 2687 | out: |
98bdb0aa | 2688 | dout("try_read done on %p ret %d\n", con, ret); |
31b8006e SW |
2689 | return ret; |
2690 | ||
2691 | bad_tag: | |
2692 | pr_err("try_read bad con->in_tag = %d\n", (int)con->in_tag); | |
2693 | con->error_msg = "protocol error, garbage tag"; | |
2694 | ret = -1; | |
2695 | goto out; | |
2696 | } | |
2697 | ||
2698 | ||
2699 | /* | |
802c6d96 AE |
2700 | * Atomically queue work on a connection after the specified delay. |
2701 | * Bump @con reference to avoid races with connection teardown. | |
2702 | * Returns 0 if work was queued, or an error code otherwise. | |
31b8006e | 2703 | */ |
802c6d96 | 2704 | static int queue_con_delay(struct ceph_connection *con, unsigned long delay) |
31b8006e | 2705 | { |
31b8006e | 2706 | if (!con->ops->get(con)) { |
802c6d96 | 2707 | dout("%s %p ref count 0\n", __func__, con); |
802c6d96 | 2708 | return -ENOENT; |
31b8006e SW |
2709 | } |
2710 | ||
802c6d96 AE |
2711 | if (!queue_delayed_work(ceph_msgr_wq, &con->work, delay)) { |
2712 | dout("%s %p - already queued\n", __func__, con); | |
31b8006e | 2713 | con->ops->put(con); |
802c6d96 | 2714 | return -EBUSY; |
31b8006e | 2715 | } |
802c6d96 AE |
2716 | |
2717 | dout("%s %p %lu\n", __func__, con, delay); | |
802c6d96 AE |
2718 | return 0; |
2719 | } | |
2720 | ||
2721 | static void queue_con(struct ceph_connection *con) | |
2722 | { | |
2723 | (void) queue_con_delay(con, 0); | |
31b8006e SW |
2724 | } |
2725 | ||
37ab77ac ID |
2726 | static void cancel_con(struct ceph_connection *con) |
2727 | { | |
2728 | if (cancel_delayed_work(&con->work)) { | |
2729 | dout("%s %p\n", __func__, con); | |
2730 | con->ops->put(con); | |
2731 | } | |
2732 | } | |
2733 | ||
7bb21d68 AE |
2734 | static bool con_sock_closed(struct ceph_connection *con) |
2735 | { | |
c9ffc77a | 2736 | if (!con_flag_test_and_clear(con, CON_FLAG_SOCK_CLOSED)) |
7bb21d68 AE |
2737 | return false; |
2738 | ||
2739 | #define CASE(x) \ | |
2740 | case CON_STATE_ ## x: \ | |
2741 | con->error_msg = "socket closed (con state " #x ")"; \ | |
2742 | break; | |
2743 | ||
2744 | switch (con->state) { | |
2745 | CASE(CLOSED); | |
2746 | CASE(PREOPEN); | |
2747 | CASE(CONNECTING); | |
2748 | CASE(NEGOTIATING); | |
2749 | CASE(OPEN); | |
2750 | CASE(STANDBY); | |
2751 | default: | |
b9a67899 | 2752 | pr_warn("%s con %p unrecognized state %lu\n", |
7bb21d68 AE |
2753 | __func__, con, con->state); |
2754 | con->error_msg = "unrecognized con state"; | |
2755 | BUG(); | |
2756 | break; | |
2757 | } | |
2758 | #undef CASE | |
2759 | ||
2760 | return true; | |
2761 | } | |
2762 | ||
f20a39fd AE |
2763 | static bool con_backoff(struct ceph_connection *con) |
2764 | { | |
2765 | int ret; | |
2766 | ||
2767 | if (!con_flag_test_and_clear(con, CON_FLAG_BACKOFF)) | |
2768 | return false; | |
2769 | ||
2770 | ret = queue_con_delay(con, round_jiffies_relative(con->delay)); | |
2771 | if (ret) { | |
2772 | dout("%s: con %p FAILED to back off %lu\n", __func__, | |
2773 | con, con->delay); | |
2774 | BUG_ON(ret == -ENOENT); | |
2775 | con_flag_set(con, CON_FLAG_BACKOFF); | |
2776 | } | |
2777 | ||
2778 | return true; | |
2779 | } | |
2780 | ||
93209264 AE |
2781 | /* Finish fault handling; con->mutex must *not* be held here */ |
2782 | ||
2783 | static void con_fault_finish(struct ceph_connection *con) | |
2784 | { | |
2785 | /* | |
2786 | * in case we faulted due to authentication, invalidate our | |
2787 | * current tickets so that we can get new ones. | |
2788 | */ | |
2789 | if (con->auth_retry && con->ops->invalidate_authorizer) { | |
2790 | dout("calling invalidate_authorizer()\n"); | |
2791 | con->ops->invalidate_authorizer(con); | |
2792 | } | |
2793 | ||
2794 | if (con->ops->fault) | |
2795 | con->ops->fault(con); | |
2796 | } | |
2797 | ||
31b8006e SW |
2798 | /* |
2799 | * Do some work on a connection. Drop a connection ref when we're done. | |
2800 | */ | |
2801 | static void con_work(struct work_struct *work) | |
2802 | { | |
2803 | struct ceph_connection *con = container_of(work, struct ceph_connection, | |
2804 | work.work); | |
49659416 | 2805 | bool fault; |
31b8006e | 2806 | |
9dd4658d | 2807 | mutex_lock(&con->mutex); |
49659416 AE |
2808 | while (true) { |
2809 | int ret; | |
31b8006e | 2810 | |
49659416 AE |
2811 | if ((fault = con_sock_closed(con))) { |
2812 | dout("%s: con %p SOCK_CLOSED\n", __func__, con); | |
2813 | break; | |
2814 | } | |
2815 | if (con_backoff(con)) { | |
2816 | dout("%s: con %p BACKOFF\n", __func__, con); | |
2817 | break; | |
2818 | } | |
2819 | if (con->state == CON_STATE_STANDBY) { | |
2820 | dout("%s: con %p STANDBY\n", __func__, con); | |
2821 | break; | |
2822 | } | |
2823 | if (con->state == CON_STATE_CLOSED) { | |
2824 | dout("%s: con %p CLOSED\n", __func__, con); | |
2825 | BUG_ON(con->sock); | |
2826 | break; | |
2827 | } | |
2828 | if (con->state == CON_STATE_PREOPEN) { | |
2829 | dout("%s: con %p PREOPEN\n", __func__, con); | |
2830 | BUG_ON(con->sock); | |
2831 | } | |
0da5d703 | 2832 | |
49659416 AE |
2833 | ret = try_read(con); |
2834 | if (ret < 0) { | |
2835 | if (ret == -EAGAIN) | |
2836 | continue; | |
67c64eb7 ID |
2837 | if (!con->error_msg) |
2838 | con->error_msg = "socket error on read"; | |
49659416 AE |
2839 | fault = true; |
2840 | break; | |
2841 | } | |
2842 | ||
2843 | ret = try_write(con); | |
2844 | if (ret < 0) { | |
2845 | if (ret == -EAGAIN) | |
2846 | continue; | |
67c64eb7 ID |
2847 | if (!con->error_msg) |
2848 | con->error_msg = "socket error on write"; | |
49659416 AE |
2849 | fault = true; |
2850 | } | |
2851 | ||
2852 | break; /* If we make it to here, we're done */ | |
3a140a0d | 2853 | } |
b6e7b6a1 AE |
2854 | if (fault) |
2855 | con_fault(con); | |
9dd4658d | 2856 | mutex_unlock(&con->mutex); |
0da5d703 | 2857 | |
b6e7b6a1 AE |
2858 | if (fault) |
2859 | con_fault_finish(con); | |
2860 | ||
2861 | con->ops->put(con); | |
31b8006e SW |
2862 | } |
2863 | ||
31b8006e SW |
2864 | /* |
2865 | * Generic error/fault handler. A retry mechanism is used with | |
2866 | * exponential backoff | |
2867 | */ | |
93209264 | 2868 | static void con_fault(struct ceph_connection *con) |
31b8006e | 2869 | { |
31b8006e | 2870 | dout("fault %p state %lu to peer %s\n", |
3d14c5d2 | 2871 | con, con->state, ceph_pr_addr(&con->peer_addr.in_addr)); |
31b8006e | 2872 | |
67c64eb7 ID |
2873 | pr_warn("%s%lld %s %s\n", ENTITY_NAME(con->peer_name), |
2874 | ceph_pr_addr(&con->peer_addr.in_addr), con->error_msg); | |
2875 | con->error_msg = NULL; | |
2876 | ||
122070a2 | 2877 | WARN_ON(con->state != CON_STATE_CONNECTING && |
8dacc7da SW |
2878 | con->state != CON_STATE_NEGOTIATING && |
2879 | con->state != CON_STATE_OPEN); | |
ec302645 | 2880 | |
31b8006e | 2881 | con_close_socket(con); |
5e095e8b | 2882 | |
c9ffc77a | 2883 | if (con_flag_test(con, CON_FLAG_LOSSYTX)) { |
8dacc7da SW |
2884 | dout("fault on LOSSYTX channel, marking CLOSED\n"); |
2885 | con->state = CON_STATE_CLOSED; | |
93209264 | 2886 | return; |
3b5ede07 SW |
2887 | } |
2888 | ||
5e095e8b | 2889 | if (con->in_msg) { |
38941f80 AE |
2890 | BUG_ON(con->in_msg->con != con); |
2891 | con->in_msg->con = NULL; | |
5e095e8b SW |
2892 | ceph_msg_put(con->in_msg); |
2893 | con->in_msg = NULL; | |
36eb71aa | 2894 | con->ops->put(con); |
5e095e8b | 2895 | } |
31b8006e | 2896 | |
e80a52d1 SW |
2897 | /* Requeue anything that hasn't been acked */ |
2898 | list_splice_init(&con->out_sent, &con->out_queue); | |
9bd2e6f8 | 2899 | |
e76661d0 SW |
2900 | /* If there are no messages queued or keepalive pending, place |
2901 | * the connection in a STANDBY state */ | |
2902 | if (list_empty(&con->out_queue) && | |
c9ffc77a | 2903 | !con_flag_test(con, CON_FLAG_KEEPALIVE_PENDING)) { |
e00de341 | 2904 | dout("fault %p setting STANDBY clearing WRITE_PENDING\n", con); |
c9ffc77a | 2905 | con_flag_clear(con, CON_FLAG_WRITE_PENDING); |
8dacc7da | 2906 | con->state = CON_STATE_STANDBY; |
e80a52d1 SW |
2907 | } else { |
2908 | /* retry after a delay. */ | |
8dacc7da | 2909 | con->state = CON_STATE_PREOPEN; |
e80a52d1 SW |
2910 | if (con->delay == 0) |
2911 | con->delay = BASE_DELAY_INTERVAL; | |
2912 | else if (con->delay < MAX_DELAY_INTERVAL) | |
2913 | con->delay *= 2; | |
c9ffc77a | 2914 | con_flag_set(con, CON_FLAG_BACKOFF); |
8618e30b | 2915 | queue_con(con); |
31b8006e | 2916 | } |
31b8006e SW |
2917 | } |
2918 | ||
2919 | ||
2920 | ||
2921 | /* | |
15d9882c | 2922 | * initialize a new messenger instance |
31b8006e | 2923 | */ |
15d9882c AE |
2924 | void ceph_messenger_init(struct ceph_messenger *msgr, |
2925 | struct ceph_entity_addr *myaddr, | |
12b4629a ID |
2926 | u64 supported_features, |
2927 | u64 required_features, | |
ba988f87 CH |
2928 | bool nocrc, |
2929 | bool tcp_nodelay) | |
31b8006e | 2930 | { |
3d14c5d2 YS |
2931 | msgr->supported_features = supported_features; |
2932 | msgr->required_features = required_features; | |
2933 | ||
31b8006e SW |
2934 | spin_lock_init(&msgr->global_seq_lock); |
2935 | ||
31b8006e SW |
2936 | if (myaddr) |
2937 | msgr->inst.addr = *myaddr; | |
2938 | ||
2939 | /* select a random nonce */ | |
ac8839d7 | 2940 | msgr->inst.addr.type = 0; |
103e2d3a | 2941 | get_random_bytes(&msgr->inst.addr.nonce, sizeof(msgr->inst.addr.nonce)); |
63f2d211 | 2942 | encode_my_addr(msgr); |
15d9882c | 2943 | msgr->nocrc = nocrc; |
ba988f87 | 2944 | msgr->tcp_nodelay = tcp_nodelay; |
31b8006e | 2945 | |
a2a32584 | 2946 | atomic_set(&msgr->stopping, 0); |
31b8006e | 2947 | |
15d9882c | 2948 | dout("%s %p\n", __func__, msgr); |
31b8006e | 2949 | } |
15d9882c | 2950 | EXPORT_SYMBOL(ceph_messenger_init); |
31b8006e | 2951 | |
e00de341 SW |
2952 | static void clear_standby(struct ceph_connection *con) |
2953 | { | |
2954 | /* come back from STANDBY? */ | |
8dacc7da | 2955 | if (con->state == CON_STATE_STANDBY) { |
e00de341 | 2956 | dout("clear_standby %p and ++connect_seq\n", con); |
8dacc7da | 2957 | con->state = CON_STATE_PREOPEN; |
e00de341 | 2958 | con->connect_seq++; |
c9ffc77a AE |
2959 | WARN_ON(con_flag_test(con, CON_FLAG_WRITE_PENDING)); |
2960 | WARN_ON(con_flag_test(con, CON_FLAG_KEEPALIVE_PENDING)); | |
e00de341 SW |
2961 | } |
2962 | } | |
2963 | ||
31b8006e SW |
2964 | /* |
2965 | * Queue up an outgoing message on the given connection. | |
2966 | */ | |
2967 | void ceph_con_send(struct ceph_connection *con, struct ceph_msg *msg) | |
2968 | { | |
31b8006e | 2969 | /* set src+dst */ |
dbad185d | 2970 | msg->hdr.src = con->msgr->inst.name; |
3ca02ef9 | 2971 | BUG_ON(msg->front.iov_len != le32_to_cpu(msg->hdr.front_len)); |
e84346b7 SW |
2972 | msg->needs_out_seq = true; |
2973 | ||
ec302645 | 2974 | mutex_lock(&con->mutex); |
92ce034b | 2975 | |
8dacc7da | 2976 | if (con->state == CON_STATE_CLOSED) { |
a59b55a6 SW |
2977 | dout("con_send %p closed, dropping %p\n", con, msg); |
2978 | ceph_msg_put(msg); | |
2979 | mutex_unlock(&con->mutex); | |
2980 | return; | |
2981 | } | |
2982 | ||
38941f80 | 2983 | BUG_ON(msg->con != NULL); |
36eb71aa | 2984 | msg->con = con->ops->get(con); |
92ce034b AE |
2985 | BUG_ON(msg->con == NULL); |
2986 | ||
31b8006e SW |
2987 | BUG_ON(!list_empty(&msg->list_head)); |
2988 | list_add_tail(&msg->list_head, &con->out_queue); | |
2989 | dout("----- %p to %s%lld %d=%s len %d+%d+%d -----\n", msg, | |
2990 | ENTITY_NAME(con->peer_name), le16_to_cpu(msg->hdr.type), | |
2991 | ceph_msg_type_name(le16_to_cpu(msg->hdr.type)), | |
2992 | le32_to_cpu(msg->hdr.front_len), | |
2993 | le32_to_cpu(msg->hdr.middle_len), | |
2994 | le32_to_cpu(msg->hdr.data_len)); | |
00650931 SW |
2995 | |
2996 | clear_standby(con); | |
ec302645 | 2997 | mutex_unlock(&con->mutex); |
31b8006e SW |
2998 | |
2999 | /* if there wasn't anything waiting to send before, queue | |
3000 | * new work */ | |
c9ffc77a | 3001 | if (con_flag_test_and_set(con, CON_FLAG_WRITE_PENDING) == 0) |
31b8006e SW |
3002 | queue_con(con); |
3003 | } | |
3d14c5d2 | 3004 | EXPORT_SYMBOL(ceph_con_send); |
31b8006e SW |
3005 | |
3006 | /* | |
3007 | * Revoke a message that was previously queued for send | |
3008 | */ | |
6740a845 | 3009 | void ceph_msg_revoke(struct ceph_msg *msg) |
31b8006e | 3010 | { |
6740a845 AE |
3011 | struct ceph_connection *con = msg->con; |
3012 | ||
3013 | if (!con) | |
3014 | return; /* Message not in our possession */ | |
3015 | ||
ec302645 | 3016 | mutex_lock(&con->mutex); |
31b8006e | 3017 | if (!list_empty(&msg->list_head)) { |
38941f80 | 3018 | dout("%s %p msg %p - was on queue\n", __func__, con, msg); |
31b8006e | 3019 | list_del_init(&msg->list_head); |
38941f80 | 3020 | BUG_ON(msg->con == NULL); |
36eb71aa | 3021 | msg->con->ops->put(msg->con); |
38941f80 | 3022 | msg->con = NULL; |
31b8006e | 3023 | msg->hdr.seq = 0; |
38941f80 | 3024 | |
31b8006e | 3025 | ceph_msg_put(msg); |
ed98adad SW |
3026 | } |
3027 | if (con->out_msg == msg) { | |
38941f80 | 3028 | dout("%s %p msg %p - was sending\n", __func__, con, msg); |
ed98adad | 3029 | con->out_msg = NULL; |
31b8006e SW |
3030 | if (con->out_kvec_is_msg) { |
3031 | con->out_skip = con->out_kvec_bytes; | |
3032 | con->out_kvec_is_msg = false; | |
3033 | } | |
ed98adad | 3034 | msg->hdr.seq = 0; |
92ce034b AE |
3035 | |
3036 | ceph_msg_put(msg); | |
31b8006e | 3037 | } |
ec302645 | 3038 | mutex_unlock(&con->mutex); |
31b8006e SW |
3039 | } |
3040 | ||
350b1c32 | 3041 | /* |
0d59ab81 | 3042 | * Revoke a message that we may be reading data into |
350b1c32 | 3043 | */ |
8921d114 | 3044 | void ceph_msg_revoke_incoming(struct ceph_msg *msg) |
350b1c32 | 3045 | { |
8921d114 AE |
3046 | struct ceph_connection *con; |
3047 | ||
3048 | BUG_ON(msg == NULL); | |
3049 | if (!msg->con) { | |
3050 | dout("%s msg %p null con\n", __func__, msg); | |
3051 | ||
3052 | return; /* Message not in our possession */ | |
3053 | } | |
3054 | ||
3055 | con = msg->con; | |
350b1c32 | 3056 | mutex_lock(&con->mutex); |
8921d114 | 3057 | if (con->in_msg == msg) { |
95c96174 ED |
3058 | unsigned int front_len = le32_to_cpu(con->in_hdr.front_len); |
3059 | unsigned int middle_len = le32_to_cpu(con->in_hdr.middle_len); | |
3060 | unsigned int data_len = le32_to_cpu(con->in_hdr.data_len); | |
350b1c32 SW |
3061 | |
3062 | /* skip rest of message */ | |
8921d114 AE |
3063 | dout("%s %p msg %p revoked\n", __func__, con, msg); |
3064 | con->in_base_pos = con->in_base_pos - | |
350b1c32 | 3065 | sizeof(struct ceph_msg_header) - |
0d59ab81 YS |
3066 | front_len - |
3067 | middle_len - | |
3068 | data_len - | |
350b1c32 | 3069 | sizeof(struct ceph_msg_footer); |
350b1c32 SW |
3070 | ceph_msg_put(con->in_msg); |
3071 | con->in_msg = NULL; | |
3072 | con->in_tag = CEPH_MSGR_TAG_READY; | |
684be25c | 3073 | con->in_seq++; |
350b1c32 | 3074 | } else { |
8921d114 AE |
3075 | dout("%s %p in_msg %p msg %p no-op\n", |
3076 | __func__, con, con->in_msg, msg); | |
350b1c32 SW |
3077 | } |
3078 | mutex_unlock(&con->mutex); | |
3079 | } | |
3080 | ||
31b8006e SW |
3081 | /* |
3082 | * Queue a keepalive byte to ensure the tcp connection is alive. | |
3083 | */ | |
3084 | void ceph_con_keepalive(struct ceph_connection *con) | |
3085 | { | |
e00de341 | 3086 | dout("con_keepalive %p\n", con); |
00650931 | 3087 | mutex_lock(&con->mutex); |
e00de341 | 3088 | clear_standby(con); |
00650931 | 3089 | mutex_unlock(&con->mutex); |
c9ffc77a AE |
3090 | if (con_flag_test_and_set(con, CON_FLAG_KEEPALIVE_PENDING) == 0 && |
3091 | con_flag_test_and_set(con, CON_FLAG_WRITE_PENDING) == 0) | |
31b8006e SW |
3092 | queue_con(con); |
3093 | } | |
3d14c5d2 | 3094 | EXPORT_SYMBOL(ceph_con_keepalive); |
31b8006e | 3095 | |
6644ed7b | 3096 | static struct ceph_msg_data *ceph_msg_data_create(enum ceph_msg_data_type type) |
43794509 | 3097 | { |
6644ed7b AE |
3098 | struct ceph_msg_data *data; |
3099 | ||
3100 | if (WARN_ON(!ceph_msg_data_type_valid(type))) | |
3101 | return NULL; | |
3102 | ||
81b36be4 | 3103 | data = kmem_cache_zalloc(ceph_msg_data_cache, GFP_NOFS); |
6644ed7b AE |
3104 | if (data) |
3105 | data->type = type; | |
5240d9f9 | 3106 | INIT_LIST_HEAD(&data->links); |
6644ed7b AE |
3107 | |
3108 | return data; | |
3109 | } | |
3110 | ||
3111 | static void ceph_msg_data_destroy(struct ceph_msg_data *data) | |
3112 | { | |
3113 | if (!data) | |
3114 | return; | |
3115 | ||
5240d9f9 | 3116 | WARN_ON(!list_empty(&data->links)); |
e4339d28 | 3117 | if (data->type == CEPH_MSG_DATA_PAGELIST) |
6644ed7b | 3118 | ceph_pagelist_release(data->pagelist); |
81b36be4 | 3119 | kmem_cache_free(ceph_msg_data_cache, data); |
43794509 AE |
3120 | } |
3121 | ||
90af3602 | 3122 | void ceph_msg_data_add_pages(struct ceph_msg *msg, struct page **pages, |
f1baeb2b | 3123 | size_t length, size_t alignment) |
02afca6c | 3124 | { |
6644ed7b AE |
3125 | struct ceph_msg_data *data; |
3126 | ||
07aa1558 AE |
3127 | BUG_ON(!pages); |
3128 | BUG_ON(!length); | |
6644ed7b AE |
3129 | |
3130 | data = ceph_msg_data_create(CEPH_MSG_DATA_PAGES); | |
3131 | BUG_ON(!data); | |
3132 | data->pages = pages; | |
3133 | data->length = length; | |
3134 | data->alignment = alignment & ~PAGE_MASK; | |
02afca6c | 3135 | |
5240d9f9 AE |
3136 | list_add_tail(&data->links, &msg->data); |
3137 | msg->data_length += length; | |
02afca6c | 3138 | } |
90af3602 | 3139 | EXPORT_SYMBOL(ceph_msg_data_add_pages); |
31b8006e | 3140 | |
90af3602 | 3141 | void ceph_msg_data_add_pagelist(struct ceph_msg *msg, |
27fa8385 AE |
3142 | struct ceph_pagelist *pagelist) |
3143 | { | |
6644ed7b AE |
3144 | struct ceph_msg_data *data; |
3145 | ||
07aa1558 AE |
3146 | BUG_ON(!pagelist); |
3147 | BUG_ON(!pagelist->length); | |
27fa8385 | 3148 | |
6644ed7b AE |
3149 | data = ceph_msg_data_create(CEPH_MSG_DATA_PAGELIST); |
3150 | BUG_ON(!data); | |
3151 | data->pagelist = pagelist; | |
3152 | ||
5240d9f9 AE |
3153 | list_add_tail(&data->links, &msg->data); |
3154 | msg->data_length += pagelist->length; | |
27fa8385 | 3155 | } |
90af3602 | 3156 | EXPORT_SYMBOL(ceph_msg_data_add_pagelist); |
27fa8385 | 3157 | |
ea96571f | 3158 | #ifdef CONFIG_BLOCK |
90af3602 | 3159 | void ceph_msg_data_add_bio(struct ceph_msg *msg, struct bio *bio, |
a1930804 | 3160 | size_t length) |
27fa8385 | 3161 | { |
6644ed7b AE |
3162 | struct ceph_msg_data *data; |
3163 | ||
07aa1558 | 3164 | BUG_ON(!bio); |
27fa8385 | 3165 | |
6644ed7b AE |
3166 | data = ceph_msg_data_create(CEPH_MSG_DATA_BIO); |
3167 | BUG_ON(!data); | |
3168 | data->bio = bio; | |
c851c495 | 3169 | data->bio_length = length; |
6644ed7b | 3170 | |
5240d9f9 AE |
3171 | list_add_tail(&data->links, &msg->data); |
3172 | msg->data_length += length; | |
27fa8385 | 3173 | } |
90af3602 | 3174 | EXPORT_SYMBOL(ceph_msg_data_add_bio); |
ea96571f | 3175 | #endif /* CONFIG_BLOCK */ |
27fa8385 | 3176 | |
31b8006e SW |
3177 | /* |
3178 | * construct a new message with given type, size | |
3179 | * the new msg has a ref count of 1. | |
3180 | */ | |
b61c2763 SW |
3181 | struct ceph_msg *ceph_msg_new(int type, int front_len, gfp_t flags, |
3182 | bool can_fail) | |
31b8006e SW |
3183 | { |
3184 | struct ceph_msg *m; | |
3185 | ||
e3d5d638 | 3186 | m = kmem_cache_zalloc(ceph_msg_cache, flags); |
31b8006e SW |
3187 | if (m == NULL) |
3188 | goto out; | |
31b8006e SW |
3189 | |
3190 | m->hdr.type = cpu_to_le16(type); | |
45c6ceb5 | 3191 | m->hdr.priority = cpu_to_le16(CEPH_MSG_PRIO_DEFAULT); |
31b8006e | 3192 | m->hdr.front_len = cpu_to_le32(front_len); |
ca20892d | 3193 | |
9516e45b AE |
3194 | INIT_LIST_HEAD(&m->list_head); |
3195 | kref_init(&m->kref); | |
5240d9f9 | 3196 | INIT_LIST_HEAD(&m->data); |
ca20892d | 3197 | |
31b8006e SW |
3198 | /* front */ |
3199 | if (front_len) { | |
eeb0bed5 | 3200 | m->front.iov_base = ceph_kvmalloc(front_len, flags); |
31b8006e | 3201 | if (m->front.iov_base == NULL) { |
b61c2763 | 3202 | dout("ceph_msg_new can't allocate %d bytes\n", |
31b8006e SW |
3203 | front_len); |
3204 | goto out2; | |
3205 | } | |
3206 | } else { | |
3207 | m->front.iov_base = NULL; | |
3208 | } | |
f2be82b0 | 3209 | m->front_alloc_len = m->front.iov_len = front_len; |
31b8006e | 3210 | |
bb257664 | 3211 | dout("ceph_msg_new %p front %d\n", m, front_len); |
31b8006e SW |
3212 | return m; |
3213 | ||
3214 | out2: | |
3215 | ceph_msg_put(m); | |
3216 | out: | |
b61c2763 SW |
3217 | if (!can_fail) { |
3218 | pr_err("msg_new can't create type %d front %d\n", type, | |
3219 | front_len); | |
f0ed1b7c | 3220 | WARN_ON(1); |
b61c2763 SW |
3221 | } else { |
3222 | dout("msg_new can't create type %d front %d\n", type, | |
3223 | front_len); | |
3224 | } | |
a79832f2 | 3225 | return NULL; |
31b8006e | 3226 | } |
3d14c5d2 | 3227 | EXPORT_SYMBOL(ceph_msg_new); |
31b8006e | 3228 | |
31b8006e SW |
3229 | /* |
3230 | * Allocate "middle" portion of a message, if it is needed and wasn't | |
3231 | * allocated by alloc_msg. This allows us to read a small fixed-size | |
3232 | * per-type header in the front and then gracefully fail (i.e., | |
3233 | * propagate the error to the caller based on info in the front) when | |
3234 | * the middle is too large. | |
3235 | */ | |
2450418c | 3236 | static int ceph_alloc_middle(struct ceph_connection *con, struct ceph_msg *msg) |
31b8006e SW |
3237 | { |
3238 | int type = le16_to_cpu(msg->hdr.type); | |
3239 | int middle_len = le32_to_cpu(msg->hdr.middle_len); | |
3240 | ||
3241 | dout("alloc_middle %p type %d %s middle_len %d\n", msg, type, | |
3242 | ceph_msg_type_name(type), middle_len); | |
3243 | BUG_ON(!middle_len); | |
3244 | BUG_ON(msg->middle); | |
3245 | ||
b6c1d5b8 | 3246 | msg->middle = ceph_buffer_new(middle_len, GFP_NOFS); |
31b8006e SW |
3247 | if (!msg->middle) |
3248 | return -ENOMEM; | |
3249 | return 0; | |
3250 | } | |
3251 | ||
2450418c | 3252 | /* |
1c20f2d2 AE |
3253 | * Allocate a message for receiving an incoming message on a |
3254 | * connection, and save the result in con->in_msg. Uses the | |
3255 | * connection's private alloc_msg op if available. | |
3256 | * | |
4740a623 SW |
3257 | * Returns 0 on success, or a negative error code. |
3258 | * | |
3259 | * On success, if we set *skip = 1: | |
3260 | * - the next message should be skipped and ignored. | |
3261 | * - con->in_msg == NULL | |
3262 | * or if we set *skip = 0: | |
3263 | * - con->in_msg is non-null. | |
3264 | * On error (ENOMEM, EAGAIN, ...), | |
3265 | * - con->in_msg == NULL | |
2450418c | 3266 | */ |
4740a623 | 3267 | static int ceph_con_in_msg_alloc(struct ceph_connection *con, int *skip) |
2450418c | 3268 | { |
4740a623 | 3269 | struct ceph_msg_header *hdr = &con->in_hdr; |
2450418c | 3270 | int middle_len = le32_to_cpu(hdr->middle_len); |
1d866d1c | 3271 | struct ceph_msg *msg; |
4740a623 | 3272 | int ret = 0; |
2450418c | 3273 | |
1c20f2d2 | 3274 | BUG_ON(con->in_msg != NULL); |
53ded495 | 3275 | BUG_ON(!con->ops->alloc_msg); |
2450418c | 3276 | |
53ded495 AE |
3277 | mutex_unlock(&con->mutex); |
3278 | msg = con->ops->alloc_msg(con, hdr, skip); | |
3279 | mutex_lock(&con->mutex); | |
3280 | if (con->state != CON_STATE_OPEN) { | |
3281 | if (msg) | |
1d866d1c | 3282 | ceph_msg_put(msg); |
53ded495 AE |
3283 | return -EAGAIN; |
3284 | } | |
4137577a AE |
3285 | if (msg) { |
3286 | BUG_ON(*skip); | |
3287 | con->in_msg = msg; | |
36eb71aa | 3288 | con->in_msg->con = con->ops->get(con); |
92ce034b | 3289 | BUG_ON(con->in_msg->con == NULL); |
4137577a AE |
3290 | } else { |
3291 | /* | |
3292 | * Null message pointer means either we should skip | |
3293 | * this message or we couldn't allocate memory. The | |
3294 | * former is not an error. | |
3295 | */ | |
3296 | if (*skip) | |
3297 | return 0; | |
4137577a | 3298 | |
67c64eb7 | 3299 | con->error_msg = "error allocating memory for incoming message"; |
53ded495 | 3300 | return -ENOMEM; |
2450418c | 3301 | } |
1c20f2d2 | 3302 | memcpy(&con->in_msg->hdr, &con->in_hdr, sizeof(con->in_hdr)); |
2450418c | 3303 | |
1c20f2d2 AE |
3304 | if (middle_len && !con->in_msg->middle) { |
3305 | ret = ceph_alloc_middle(con, con->in_msg); | |
2450418c | 3306 | if (ret < 0) { |
1c20f2d2 AE |
3307 | ceph_msg_put(con->in_msg); |
3308 | con->in_msg = NULL; | |
2450418c YS |
3309 | } |
3310 | } | |
9d7f0f13 | 3311 | |
4740a623 | 3312 | return ret; |
2450418c YS |
3313 | } |
3314 | ||
31b8006e SW |
3315 | |
3316 | /* | |
3317 | * Free a generically kmalloc'd message. | |
3318 | */ | |
0215e44b | 3319 | static void ceph_msg_free(struct ceph_msg *m) |
31b8006e | 3320 | { |
0215e44b | 3321 | dout("%s %p\n", __func__, m); |
4965fc38 | 3322 | kvfree(m->front.iov_base); |
e3d5d638 | 3323 | kmem_cache_free(ceph_msg_cache, m); |
31b8006e SW |
3324 | } |
3325 | ||
0215e44b | 3326 | static void ceph_msg_release(struct kref *kref) |
c2e552e7 SW |
3327 | { |
3328 | struct ceph_msg *m = container_of(kref, struct ceph_msg, kref); | |
5240d9f9 AE |
3329 | LIST_HEAD(data); |
3330 | struct list_head *links; | |
3331 | struct list_head *next; | |
31b8006e | 3332 | |
0215e44b | 3333 | dout("%s %p\n", __func__, m); |
c2e552e7 SW |
3334 | WARN_ON(!list_empty(&m->list_head)); |
3335 | ||
3336 | /* drop middle, data, if any */ | |
3337 | if (m->middle) { | |
3338 | ceph_buffer_put(m->middle); | |
3339 | m->middle = NULL; | |
31b8006e | 3340 | } |
5240d9f9 AE |
3341 | |
3342 | list_splice_init(&m->data, &data); | |
3343 | list_for_each_safe(links, next, &data) { | |
3344 | struct ceph_msg_data *data; | |
3345 | ||
3346 | data = list_entry(links, struct ceph_msg_data, links); | |
3347 | list_del_init(links); | |
3348 | ceph_msg_data_destroy(data); | |
3349 | } | |
a1930804 | 3350 | m->data_length = 0; |
58bb3b37 | 3351 | |
c2e552e7 SW |
3352 | if (m->pool) |
3353 | ceph_msgpool_put(m->pool, m); | |
3354 | else | |
0215e44b ID |
3355 | ceph_msg_free(m); |
3356 | } | |
3357 | ||
3358 | struct ceph_msg *ceph_msg_get(struct ceph_msg *msg) | |
3359 | { | |
3360 | dout("%s %p (was %d)\n", __func__, msg, | |
3361 | atomic_read(&msg->kref.refcount)); | |
3362 | kref_get(&msg->kref); | |
3363 | return msg; | |
3364 | } | |
3365 | EXPORT_SYMBOL(ceph_msg_get); | |
3366 | ||
3367 | void ceph_msg_put(struct ceph_msg *msg) | |
3368 | { | |
3369 | dout("%s %p (was %d)\n", __func__, msg, | |
3370 | atomic_read(&msg->kref.refcount)); | |
3371 | kref_put(&msg->kref, ceph_msg_release); | |
31b8006e | 3372 | } |
0215e44b | 3373 | EXPORT_SYMBOL(ceph_msg_put); |
9ec7cab1 SW |
3374 | |
3375 | void ceph_msg_dump(struct ceph_msg *msg) | |
3376 | { | |
3cea4c30 ID |
3377 | pr_debug("msg_dump %p (front_alloc_len %d length %zd)\n", msg, |
3378 | msg->front_alloc_len, msg->data_length); | |
9ec7cab1 SW |
3379 | print_hex_dump(KERN_DEBUG, "header: ", |
3380 | DUMP_PREFIX_OFFSET, 16, 1, | |
3381 | &msg->hdr, sizeof(msg->hdr), true); | |
3382 | print_hex_dump(KERN_DEBUG, " front: ", | |
3383 | DUMP_PREFIX_OFFSET, 16, 1, | |
3384 | msg->front.iov_base, msg->front.iov_len, true); | |
3385 | if (msg->middle) | |
3386 | print_hex_dump(KERN_DEBUG, "middle: ", | |
3387 | DUMP_PREFIX_OFFSET, 16, 1, | |
3388 | msg->middle->vec.iov_base, | |
3389 | msg->middle->vec.iov_len, true); | |
3390 | print_hex_dump(KERN_DEBUG, "footer: ", | |
3391 | DUMP_PREFIX_OFFSET, 16, 1, | |
3392 | &msg->footer, sizeof(msg->footer), true); | |
3393 | } | |
3d14c5d2 | 3394 | EXPORT_SYMBOL(ceph_msg_dump); |