]>
Commit | Line | Data |
---|---|---|
3d14c5d2 | 1 | #include <linux/ceph/ceph_debug.h> |
31b8006e SW |
2 | |
3 | #include <linux/crc32c.h> | |
4 | #include <linux/ctype.h> | |
5 | #include <linux/highmem.h> | |
6 | #include <linux/inet.h> | |
7 | #include <linux/kthread.h> | |
8 | #include <linux/net.h> | |
5a0e3ad6 | 9 | #include <linux/slab.h> |
31b8006e SW |
10 | #include <linux/socket.h> |
11 | #include <linux/string.h> | |
3ebc21f7 | 12 | #ifdef CONFIG_BLOCK |
68b4476b | 13 | #include <linux/bio.h> |
3ebc21f7 | 14 | #endif /* CONFIG_BLOCK */ |
ee3b56f2 | 15 | #include <linux/dns_resolver.h> |
31b8006e SW |
16 | #include <net/tcp.h> |
17 | ||
3d14c5d2 YS |
18 | #include <linux/ceph/libceph.h> |
19 | #include <linux/ceph/messenger.h> | |
20 | #include <linux/ceph/decode.h> | |
21 | #include <linux/ceph/pagelist.h> | |
bc3b2d7f | 22 | #include <linux/export.h> |
31b8006e | 23 | |
fe38a2b6 AE |
24 | #define list_entry_next(pos, member) \ |
25 | list_entry(pos->member.next, typeof(*pos), member) | |
26 | ||
31b8006e SW |
27 | /* |
28 | * Ceph uses the messenger to exchange ceph_msg messages with other | |
29 | * hosts in the system. The messenger provides ordered and reliable | |
30 | * delivery. We tolerate TCP disconnects by reconnecting (with | |
31 | * exponential backoff) in the case of a fault (disconnection, bad | |
32 | * crc, protocol error). Acks allow sent messages to be discarded by | |
33 | * the sender. | |
34 | */ | |
35 | ||
bc18f4b1 AE |
36 | /* |
37 | * We track the state of the socket on a given connection using | |
38 | * values defined below. The transition to a new socket state is | |
39 | * handled by a function which verifies we aren't coming from an | |
40 | * unexpected state. | |
41 | * | |
42 | * -------- | |
43 | * | NEW* | transient initial state | |
44 | * -------- | |
45 | * | con_sock_state_init() | |
46 | * v | |
47 | * ---------- | |
48 | * | CLOSED | initialized, but no socket (and no | |
49 | * ---------- TCP connection) | |
50 | * ^ \ | |
51 | * | \ con_sock_state_connecting() | |
52 | * | ---------------------- | |
53 | * | \ | |
54 | * + con_sock_state_closed() \ | |
fbb85a47 SW |
55 | * |+--------------------------- \ |
56 | * | \ \ \ | |
57 | * | ----------- \ \ | |
58 | * | | CLOSING | socket event; \ \ | |
59 | * | ----------- await close \ \ | |
60 | * | ^ \ | | |
61 | * | | \ | | |
62 | * | + con_sock_state_closing() \ | | |
63 | * | / \ | | | |
64 | * | / --------------- | | | |
65 | * | / \ v v | |
bc18f4b1 AE |
66 | * | / -------------- |
67 | * | / -----------------| CONNECTING | socket created, TCP | |
68 | * | | / -------------- connect initiated | |
69 | * | | | con_sock_state_connected() | |
70 | * | | v | |
71 | * ------------- | |
72 | * | CONNECTED | TCP connection established | |
73 | * ------------- | |
74 | * | |
75 | * State values for ceph_connection->sock_state; NEW is assumed to be 0. | |
76 | */ | |
ce2c8903 AE |
77 | |
78 | #define CON_SOCK_STATE_NEW 0 /* -> CLOSED */ | |
79 | #define CON_SOCK_STATE_CLOSED 1 /* -> CONNECTING */ | |
80 | #define CON_SOCK_STATE_CONNECTING 2 /* -> CONNECTED or -> CLOSING */ | |
81 | #define CON_SOCK_STATE_CONNECTED 3 /* -> CLOSING or -> CLOSED */ | |
82 | #define CON_SOCK_STATE_CLOSING 4 /* -> CLOSED */ | |
83 | ||
8dacc7da SW |
84 | /* |
85 | * connection states | |
86 | */ | |
87 | #define CON_STATE_CLOSED 1 /* -> PREOPEN */ | |
88 | #define CON_STATE_PREOPEN 2 /* -> CONNECTING, CLOSED */ | |
89 | #define CON_STATE_CONNECTING 3 /* -> NEGOTIATING, CLOSED */ | |
90 | #define CON_STATE_NEGOTIATING 4 /* -> OPEN, CLOSED */ | |
91 | #define CON_STATE_OPEN 5 /* -> STANDBY, CLOSED */ | |
92 | #define CON_STATE_STANDBY 6 /* -> PREOPEN, CLOSED */ | |
93 | ||
4a861692 SW |
94 | /* |
95 | * ceph_connection flag bits | |
96 | */ | |
97 | #define CON_FLAG_LOSSYTX 0 /* we can close channel or drop | |
98 | * messages on errors */ | |
99 | #define CON_FLAG_KEEPALIVE_PENDING 1 /* we need to send a keepalive */ | |
100 | #define CON_FLAG_WRITE_PENDING 2 /* we have data ready to send */ | |
101 | #define CON_FLAG_SOCK_CLOSED 3 /* socket state changed to closed */ | |
102 | #define CON_FLAG_BACKOFF 4 /* need to retry queuing delayed work */ | |
8dacc7da | 103 | |
c9ffc77a AE |
104 | static bool con_flag_valid(unsigned long con_flag) |
105 | { | |
106 | switch (con_flag) { | |
107 | case CON_FLAG_LOSSYTX: | |
108 | case CON_FLAG_KEEPALIVE_PENDING: | |
109 | case CON_FLAG_WRITE_PENDING: | |
110 | case CON_FLAG_SOCK_CLOSED: | |
111 | case CON_FLAG_BACKOFF: | |
112 | return true; | |
113 | default: | |
114 | return false; | |
115 | } | |
116 | } | |
117 | ||
118 | static void con_flag_clear(struct ceph_connection *con, unsigned long con_flag) | |
119 | { | |
120 | BUG_ON(!con_flag_valid(con_flag)); | |
121 | ||
122 | clear_bit(con_flag, &con->flags); | |
123 | } | |
124 | ||
125 | static void con_flag_set(struct ceph_connection *con, unsigned long con_flag) | |
126 | { | |
127 | BUG_ON(!con_flag_valid(con_flag)); | |
128 | ||
129 | set_bit(con_flag, &con->flags); | |
130 | } | |
131 | ||
132 | static bool con_flag_test(struct ceph_connection *con, unsigned long con_flag) | |
133 | { | |
134 | BUG_ON(!con_flag_valid(con_flag)); | |
135 | ||
136 | return test_bit(con_flag, &con->flags); | |
137 | } | |
138 | ||
139 | static bool con_flag_test_and_clear(struct ceph_connection *con, | |
140 | unsigned long con_flag) | |
141 | { | |
142 | BUG_ON(!con_flag_valid(con_flag)); | |
143 | ||
144 | return test_and_clear_bit(con_flag, &con->flags); | |
145 | } | |
146 | ||
147 | static bool con_flag_test_and_set(struct ceph_connection *con, | |
148 | unsigned long con_flag) | |
149 | { | |
150 | BUG_ON(!con_flag_valid(con_flag)); | |
151 | ||
152 | return test_and_set_bit(con_flag, &con->flags); | |
153 | } | |
154 | ||
31b8006e SW |
155 | /* static tag bytes (protocol control messages) */ |
156 | static char tag_msg = CEPH_MSGR_TAG_MSG; | |
157 | static char tag_ack = CEPH_MSGR_TAG_ACK; | |
158 | static char tag_keepalive = CEPH_MSGR_TAG_KEEPALIVE; | |
159 | ||
a6a5349d SW |
160 | #ifdef CONFIG_LOCKDEP |
161 | static struct lock_class_key socket_class; | |
162 | #endif | |
163 | ||
84495f49 AE |
164 | /* |
165 | * When skipping (ignoring) a block of input we read it into a "skip | |
166 | * buffer," which is this many bytes in size. | |
167 | */ | |
168 | #define SKIP_BUF_SIZE 1024 | |
31b8006e SW |
169 | |
170 | static void queue_con(struct ceph_connection *con); | |
171 | static void con_work(struct work_struct *); | |
93209264 | 172 | static void con_fault(struct ceph_connection *con); |
31b8006e | 173 | |
31b8006e | 174 | /* |
f64a9317 AE |
175 | * Nicely render a sockaddr as a string. An array of formatted |
176 | * strings is used, to approximate reentrancy. | |
31b8006e | 177 | */ |
f64a9317 AE |
178 | #define ADDR_STR_COUNT_LOG 5 /* log2(# address strings in array) */ |
179 | #define ADDR_STR_COUNT (1 << ADDR_STR_COUNT_LOG) | |
180 | #define ADDR_STR_COUNT_MASK (ADDR_STR_COUNT - 1) | |
181 | #define MAX_ADDR_STR_LEN 64 /* 54 is enough */ | |
182 | ||
183 | static char addr_str[ADDR_STR_COUNT][MAX_ADDR_STR_LEN]; | |
184 | static atomic_t addr_str_seq = ATOMIC_INIT(0); | |
31b8006e | 185 | |
57666519 | 186 | static struct page *zero_page; /* used in certain error cases */ |
57666519 | 187 | |
3d14c5d2 | 188 | const char *ceph_pr_addr(const struct sockaddr_storage *ss) |
31b8006e SW |
189 | { |
190 | int i; | |
191 | char *s; | |
99f0f3b2 AE |
192 | struct sockaddr_in *in4 = (struct sockaddr_in *) ss; |
193 | struct sockaddr_in6 *in6 = (struct sockaddr_in6 *) ss; | |
31b8006e | 194 | |
f64a9317 | 195 | i = atomic_inc_return(&addr_str_seq) & ADDR_STR_COUNT_MASK; |
31b8006e SW |
196 | s = addr_str[i]; |
197 | ||
198 | switch (ss->ss_family) { | |
199 | case AF_INET: | |
bd406145 AE |
200 | snprintf(s, MAX_ADDR_STR_LEN, "%pI4:%hu", &in4->sin_addr, |
201 | ntohs(in4->sin_port)); | |
31b8006e SW |
202 | break; |
203 | ||
204 | case AF_INET6: | |
bd406145 AE |
205 | snprintf(s, MAX_ADDR_STR_LEN, "[%pI6c]:%hu", &in6->sin6_addr, |
206 | ntohs(in6->sin6_port)); | |
31b8006e SW |
207 | break; |
208 | ||
209 | default: | |
d3002b97 AE |
210 | snprintf(s, MAX_ADDR_STR_LEN, "(unknown sockaddr family %hu)", |
211 | ss->ss_family); | |
31b8006e SW |
212 | } |
213 | ||
214 | return s; | |
215 | } | |
3d14c5d2 | 216 | EXPORT_SYMBOL(ceph_pr_addr); |
31b8006e | 217 | |
63f2d211 SW |
218 | static void encode_my_addr(struct ceph_messenger *msgr) |
219 | { | |
220 | memcpy(&msgr->my_enc_addr, &msgr->inst.addr, sizeof(msgr->my_enc_addr)); | |
221 | ceph_encode_addr(&msgr->my_enc_addr); | |
222 | } | |
223 | ||
31b8006e SW |
224 | /* |
225 | * work queue for all reading and writing to/from the socket. | |
226 | */ | |
e0f43c94 | 227 | static struct workqueue_struct *ceph_msgr_wq; |
31b8006e | 228 | |
15417167 | 229 | static void _ceph_msgr_exit(void) |
6173d1f0 | 230 | { |
d3002b97 | 231 | if (ceph_msgr_wq) { |
6173d1f0 | 232 | destroy_workqueue(ceph_msgr_wq); |
d3002b97 AE |
233 | ceph_msgr_wq = NULL; |
234 | } | |
6173d1f0 | 235 | |
6173d1f0 AE |
236 | BUG_ON(zero_page == NULL); |
237 | kunmap(zero_page); | |
238 | page_cache_release(zero_page); | |
239 | zero_page = NULL; | |
240 | } | |
241 | ||
3d14c5d2 | 242 | int ceph_msgr_init(void) |
31b8006e | 243 | { |
57666519 AE |
244 | BUG_ON(zero_page != NULL); |
245 | zero_page = ZERO_PAGE(0); | |
246 | page_cache_get(zero_page); | |
247 | ||
f363e45f | 248 | ceph_msgr_wq = alloc_workqueue("ceph-msgr", WQ_NON_REENTRANT, 0); |
6173d1f0 AE |
249 | if (ceph_msgr_wq) |
250 | return 0; | |
57666519 | 251 | |
6173d1f0 AE |
252 | pr_err("msgr_init failed to create workqueue\n"); |
253 | _ceph_msgr_exit(); | |
57666519 | 254 | |
6173d1f0 | 255 | return -ENOMEM; |
31b8006e | 256 | } |
3d14c5d2 | 257 | EXPORT_SYMBOL(ceph_msgr_init); |
31b8006e SW |
258 | |
259 | void ceph_msgr_exit(void) | |
260 | { | |
57666519 | 261 | BUG_ON(ceph_msgr_wq == NULL); |
57666519 | 262 | |
6173d1f0 | 263 | _ceph_msgr_exit(); |
31b8006e | 264 | } |
3d14c5d2 | 265 | EXPORT_SYMBOL(ceph_msgr_exit); |
31b8006e | 266 | |
cd84db6e | 267 | void ceph_msgr_flush(void) |
a922d38f SW |
268 | { |
269 | flush_workqueue(ceph_msgr_wq); | |
270 | } | |
3d14c5d2 | 271 | EXPORT_SYMBOL(ceph_msgr_flush); |
a922d38f | 272 | |
ce2c8903 AE |
273 | /* Connection socket state transition functions */ |
274 | ||
275 | static void con_sock_state_init(struct ceph_connection *con) | |
276 | { | |
277 | int old_state; | |
278 | ||
279 | old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CLOSED); | |
280 | if (WARN_ON(old_state != CON_SOCK_STATE_NEW)) | |
281 | printk("%s: unexpected old state %d\n", __func__, old_state); | |
8007b8d6 SW |
282 | dout("%s con %p sock %d -> %d\n", __func__, con, old_state, |
283 | CON_SOCK_STATE_CLOSED); | |
ce2c8903 AE |
284 | } |
285 | ||
286 | static void con_sock_state_connecting(struct ceph_connection *con) | |
287 | { | |
288 | int old_state; | |
289 | ||
290 | old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CONNECTING); | |
291 | if (WARN_ON(old_state != CON_SOCK_STATE_CLOSED)) | |
292 | printk("%s: unexpected old state %d\n", __func__, old_state); | |
8007b8d6 SW |
293 | dout("%s con %p sock %d -> %d\n", __func__, con, old_state, |
294 | CON_SOCK_STATE_CONNECTING); | |
ce2c8903 AE |
295 | } |
296 | ||
297 | static void con_sock_state_connected(struct ceph_connection *con) | |
298 | { | |
299 | int old_state; | |
300 | ||
301 | old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CONNECTED); | |
302 | if (WARN_ON(old_state != CON_SOCK_STATE_CONNECTING)) | |
303 | printk("%s: unexpected old state %d\n", __func__, old_state); | |
8007b8d6 SW |
304 | dout("%s con %p sock %d -> %d\n", __func__, con, old_state, |
305 | CON_SOCK_STATE_CONNECTED); | |
ce2c8903 AE |
306 | } |
307 | ||
308 | static void con_sock_state_closing(struct ceph_connection *con) | |
309 | { | |
310 | int old_state; | |
311 | ||
312 | old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CLOSING); | |
313 | if (WARN_ON(old_state != CON_SOCK_STATE_CONNECTING && | |
314 | old_state != CON_SOCK_STATE_CONNECTED && | |
315 | old_state != CON_SOCK_STATE_CLOSING)) | |
316 | printk("%s: unexpected old state %d\n", __func__, old_state); | |
8007b8d6 SW |
317 | dout("%s con %p sock %d -> %d\n", __func__, con, old_state, |
318 | CON_SOCK_STATE_CLOSING); | |
ce2c8903 AE |
319 | } |
320 | ||
321 | static void con_sock_state_closed(struct ceph_connection *con) | |
322 | { | |
323 | int old_state; | |
324 | ||
325 | old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CLOSED); | |
326 | if (WARN_ON(old_state != CON_SOCK_STATE_CONNECTED && | |
fbb85a47 | 327 | old_state != CON_SOCK_STATE_CLOSING && |
8007b8d6 SW |
328 | old_state != CON_SOCK_STATE_CONNECTING && |
329 | old_state != CON_SOCK_STATE_CLOSED)) | |
ce2c8903 | 330 | printk("%s: unexpected old state %d\n", __func__, old_state); |
8007b8d6 SW |
331 | dout("%s con %p sock %d -> %d\n", __func__, con, old_state, |
332 | CON_SOCK_STATE_CLOSED); | |
ce2c8903 | 333 | } |
a922d38f | 334 | |
31b8006e SW |
335 | /* |
336 | * socket callback functions | |
337 | */ | |
338 | ||
339 | /* data available on socket, or listen socket received a connect */ | |
327800bd | 340 | static void ceph_sock_data_ready(struct sock *sk, int count_unused) |
31b8006e | 341 | { |
bd406145 | 342 | struct ceph_connection *con = sk->sk_user_data; |
a2a32584 GH |
343 | if (atomic_read(&con->msgr->stopping)) { |
344 | return; | |
345 | } | |
bd406145 | 346 | |
31b8006e | 347 | if (sk->sk_state != TCP_CLOSE_WAIT) { |
327800bd | 348 | dout("%s on %p state = %lu, queueing work\n", __func__, |
31b8006e SW |
349 | con, con->state); |
350 | queue_con(con); | |
351 | } | |
352 | } | |
353 | ||
354 | /* socket has buffer space for writing */ | |
327800bd | 355 | static void ceph_sock_write_space(struct sock *sk) |
31b8006e | 356 | { |
d3002b97 | 357 | struct ceph_connection *con = sk->sk_user_data; |
31b8006e | 358 | |
182fac26 JS |
359 | /* only queue to workqueue if there is data we want to write, |
360 | * and there is sufficient space in the socket buffer to accept | |
327800bd | 361 | * more data. clear SOCK_NOSPACE so that ceph_sock_write_space() |
182fac26 JS |
362 | * doesn't get called again until try_write() fills the socket |
363 | * buffer. See net/ipv4/tcp_input.c:tcp_check_space() | |
364 | * and net/core/stream.c:sk_stream_write_space(). | |
365 | */ | |
c9ffc77a | 366 | if (con_flag_test(con, CON_FLAG_WRITE_PENDING)) { |
182fac26 | 367 | if (sk_stream_wspace(sk) >= sk_stream_min_wspace(sk)) { |
327800bd | 368 | dout("%s %p queueing write work\n", __func__, con); |
182fac26 JS |
369 | clear_bit(SOCK_NOSPACE, &sk->sk_socket->flags); |
370 | queue_con(con); | |
371 | } | |
31b8006e | 372 | } else { |
327800bd | 373 | dout("%s %p nothing to write\n", __func__, con); |
31b8006e | 374 | } |
31b8006e SW |
375 | } |
376 | ||
377 | /* socket's state has changed */ | |
327800bd | 378 | static void ceph_sock_state_change(struct sock *sk) |
31b8006e | 379 | { |
bd406145 | 380 | struct ceph_connection *con = sk->sk_user_data; |
31b8006e | 381 | |
327800bd | 382 | dout("%s %p state = %lu sk_state = %u\n", __func__, |
31b8006e SW |
383 | con, con->state, sk->sk_state); |
384 | ||
31b8006e SW |
385 | switch (sk->sk_state) { |
386 | case TCP_CLOSE: | |
327800bd | 387 | dout("%s TCP_CLOSE\n", __func__); |
31b8006e | 388 | case TCP_CLOSE_WAIT: |
327800bd | 389 | dout("%s TCP_CLOSE_WAIT\n", __func__); |
ce2c8903 | 390 | con_sock_state_closing(con); |
c9ffc77a | 391 | con_flag_set(con, CON_FLAG_SOCK_CLOSED); |
d65c9e0b | 392 | queue_con(con); |
31b8006e SW |
393 | break; |
394 | case TCP_ESTABLISHED: | |
327800bd | 395 | dout("%s TCP_ESTABLISHED\n", __func__); |
ce2c8903 | 396 | con_sock_state_connected(con); |
31b8006e SW |
397 | queue_con(con); |
398 | break; | |
d3002b97 AE |
399 | default: /* Everything else is uninteresting */ |
400 | break; | |
31b8006e SW |
401 | } |
402 | } | |
403 | ||
404 | /* | |
405 | * set up socket callbacks | |
406 | */ | |
407 | static void set_sock_callbacks(struct socket *sock, | |
408 | struct ceph_connection *con) | |
409 | { | |
410 | struct sock *sk = sock->sk; | |
bd406145 | 411 | sk->sk_user_data = con; |
327800bd AE |
412 | sk->sk_data_ready = ceph_sock_data_ready; |
413 | sk->sk_write_space = ceph_sock_write_space; | |
414 | sk->sk_state_change = ceph_sock_state_change; | |
31b8006e SW |
415 | } |
416 | ||
417 | ||
418 | /* | |
419 | * socket helpers | |
420 | */ | |
421 | ||
422 | /* | |
423 | * initiate connection to a remote socket. | |
424 | */ | |
41617d0c | 425 | static int ceph_tcp_connect(struct ceph_connection *con) |
31b8006e | 426 | { |
f91d3471 | 427 | struct sockaddr_storage *paddr = &con->peer_addr.in_addr; |
31b8006e SW |
428 | struct socket *sock; |
429 | int ret; | |
430 | ||
431 | BUG_ON(con->sock); | |
f91d3471 SW |
432 | ret = sock_create_kern(con->peer_addr.in_addr.ss_family, SOCK_STREAM, |
433 | IPPROTO_TCP, &sock); | |
31b8006e | 434 | if (ret) |
41617d0c | 435 | return ret; |
31b8006e SW |
436 | sock->sk->sk_allocation = GFP_NOFS; |
437 | ||
a6a5349d SW |
438 | #ifdef CONFIG_LOCKDEP |
439 | lockdep_set_class(&sock->sk->sk_lock, &socket_class); | |
440 | #endif | |
441 | ||
31b8006e SW |
442 | set_sock_callbacks(sock, con); |
443 | ||
3d14c5d2 | 444 | dout("connect %s\n", ceph_pr_addr(&con->peer_addr.in_addr)); |
31b8006e | 445 | |
89a86be0 | 446 | con_sock_state_connecting(con); |
f91d3471 SW |
447 | ret = sock->ops->connect(sock, (struct sockaddr *)paddr, sizeof(*paddr), |
448 | O_NONBLOCK); | |
31b8006e SW |
449 | if (ret == -EINPROGRESS) { |
450 | dout("connect %s EINPROGRESS sk_state = %u\n", | |
3d14c5d2 | 451 | ceph_pr_addr(&con->peer_addr.in_addr), |
31b8006e | 452 | sock->sk->sk_state); |
a5bc3129 | 453 | } else if (ret < 0) { |
31b8006e | 454 | pr_err("connect %s error %d\n", |
3d14c5d2 | 455 | ceph_pr_addr(&con->peer_addr.in_addr), ret); |
31b8006e | 456 | sock_release(sock); |
31b8006e | 457 | con->error_msg = "connect error"; |
31b8006e | 458 | |
41617d0c | 459 | return ret; |
a5bc3129 AE |
460 | } |
461 | con->sock = sock; | |
41617d0c | 462 | return 0; |
31b8006e SW |
463 | } |
464 | ||
465 | static int ceph_tcp_recvmsg(struct socket *sock, void *buf, size_t len) | |
466 | { | |
467 | struct kvec iov = {buf, len}; | |
468 | struct msghdr msg = { .msg_flags = MSG_DONTWAIT | MSG_NOSIGNAL }; | |
98bdb0aa | 469 | int r; |
31b8006e | 470 | |
98bdb0aa SW |
471 | r = kernel_recvmsg(sock, &msg, &iov, 1, len, msg.msg_flags); |
472 | if (r == -EAGAIN) | |
473 | r = 0; | |
474 | return r; | |
31b8006e SW |
475 | } |
476 | ||
afb3d90e AE |
477 | static int ceph_tcp_recvpage(struct socket *sock, struct page *page, |
478 | int page_offset, size_t length) | |
479 | { | |
480 | void *kaddr; | |
481 | int ret; | |
482 | ||
483 | BUG_ON(page_offset + length > PAGE_SIZE); | |
484 | ||
485 | kaddr = kmap(page); | |
486 | BUG_ON(!kaddr); | |
487 | ret = ceph_tcp_recvmsg(sock, kaddr + page_offset, length); | |
488 | kunmap(page); | |
489 | ||
490 | return ret; | |
491 | } | |
492 | ||
31b8006e SW |
493 | /* |
494 | * write something. @more is true if caller will be sending more data | |
495 | * shortly. | |
496 | */ | |
497 | static int ceph_tcp_sendmsg(struct socket *sock, struct kvec *iov, | |
498 | size_t kvlen, size_t len, int more) | |
499 | { | |
500 | struct msghdr msg = { .msg_flags = MSG_DONTWAIT | MSG_NOSIGNAL }; | |
42961d23 | 501 | int r; |
31b8006e SW |
502 | |
503 | if (more) | |
504 | msg.msg_flags |= MSG_MORE; | |
505 | else | |
506 | msg.msg_flags |= MSG_EOR; /* superfluous, but what the hell */ | |
507 | ||
42961d23 SW |
508 | r = kernel_sendmsg(sock, &msg, iov, kvlen, len); |
509 | if (r == -EAGAIN) | |
510 | r = 0; | |
511 | return r; | |
31b8006e SW |
512 | } |
513 | ||
31739139 | 514 | static int ceph_tcp_sendpage(struct socket *sock, struct page *page, |
e1dcb128 | 515 | int offset, size_t size, bool more) |
31739139 AE |
516 | { |
517 | int flags = MSG_DONTWAIT | MSG_NOSIGNAL | (more ? MSG_MORE : MSG_EOR); | |
518 | int ret; | |
519 | ||
520 | ret = kernel_sendpage(sock, page, offset, size, flags); | |
521 | if (ret == -EAGAIN) | |
522 | ret = 0; | |
523 | ||
524 | return ret; | |
525 | } | |
526 | ||
31b8006e SW |
527 | |
528 | /* | |
529 | * Shutdown/close the socket for the given connection. | |
530 | */ | |
531 | static int con_close_socket(struct ceph_connection *con) | |
532 | { | |
8007b8d6 | 533 | int rc = 0; |
31b8006e SW |
534 | |
535 | dout("con_close_socket on %p sock %p\n", con, con->sock); | |
8007b8d6 SW |
536 | if (con->sock) { |
537 | rc = con->sock->ops->shutdown(con->sock, SHUT_RDWR); | |
538 | sock_release(con->sock); | |
539 | con->sock = NULL; | |
540 | } | |
456ea468 AE |
541 | |
542 | /* | |
4a861692 | 543 | * Forcibly clear the SOCK_CLOSED flag. It gets set |
456ea468 AE |
544 | * independent of the connection mutex, and we could have |
545 | * received a socket close event before we had the chance to | |
546 | * shut the socket down. | |
547 | */ | |
c9ffc77a | 548 | con_flag_clear(con, CON_FLAG_SOCK_CLOSED); |
8007b8d6 | 549 | |
ce2c8903 | 550 | con_sock_state_closed(con); |
31b8006e SW |
551 | return rc; |
552 | } | |
553 | ||
554 | /* | |
555 | * Reset a connection. Discard all incoming and outgoing messages | |
556 | * and clear *_seq state. | |
557 | */ | |
558 | static void ceph_msg_remove(struct ceph_msg *msg) | |
559 | { | |
560 | list_del_init(&msg->list_head); | |
38941f80 | 561 | BUG_ON(msg->con == NULL); |
36eb71aa | 562 | msg->con->ops->put(msg->con); |
38941f80 AE |
563 | msg->con = NULL; |
564 | ||
31b8006e SW |
565 | ceph_msg_put(msg); |
566 | } | |
567 | static void ceph_msg_remove_list(struct list_head *head) | |
568 | { | |
569 | while (!list_empty(head)) { | |
570 | struct ceph_msg *msg = list_first_entry(head, struct ceph_msg, | |
571 | list_head); | |
572 | ceph_msg_remove(msg); | |
573 | } | |
574 | } | |
575 | ||
576 | static void reset_connection(struct ceph_connection *con) | |
577 | { | |
578 | /* reset connection, out_queue, msg_ and connect_seq */ | |
579 | /* discard existing out_queue and msg_seq */ | |
0fa6ebc6 | 580 | dout("reset_connection %p\n", con); |
31b8006e SW |
581 | ceph_msg_remove_list(&con->out_queue); |
582 | ceph_msg_remove_list(&con->out_sent); | |
583 | ||
cf3e5c40 | 584 | if (con->in_msg) { |
38941f80 AE |
585 | BUG_ON(con->in_msg->con != con); |
586 | con->in_msg->con = NULL; | |
cf3e5c40 SW |
587 | ceph_msg_put(con->in_msg); |
588 | con->in_msg = NULL; | |
36eb71aa | 589 | con->ops->put(con); |
cf3e5c40 SW |
590 | } |
591 | ||
31b8006e SW |
592 | con->connect_seq = 0; |
593 | con->out_seq = 0; | |
c86a2930 SW |
594 | if (con->out_msg) { |
595 | ceph_msg_put(con->out_msg); | |
596 | con->out_msg = NULL; | |
597 | } | |
31b8006e | 598 | con->in_seq = 0; |
0e0d5e0c | 599 | con->in_seq_acked = 0; |
31b8006e SW |
600 | } |
601 | ||
602 | /* | |
603 | * mark a peer down. drop any open connections. | |
604 | */ | |
605 | void ceph_con_close(struct ceph_connection *con) | |
606 | { | |
8c50c817 | 607 | mutex_lock(&con->mutex); |
3d14c5d2 YS |
608 | dout("con_close %p peer %s\n", con, |
609 | ceph_pr_addr(&con->peer_addr.in_addr)); | |
8dacc7da | 610 | con->state = CON_STATE_CLOSED; |
a5988c49 | 611 | |
c9ffc77a AE |
612 | con_flag_clear(con, CON_FLAG_LOSSYTX); /* so we retry next connect */ |
613 | con_flag_clear(con, CON_FLAG_KEEPALIVE_PENDING); | |
614 | con_flag_clear(con, CON_FLAG_WRITE_PENDING); | |
615 | con_flag_clear(con, CON_FLAG_BACKOFF); | |
a5988c49 | 616 | |
31b8006e | 617 | reset_connection(con); |
6f2bc3ff | 618 | con->peer_global_seq = 0; |
91e45ce3 | 619 | cancel_delayed_work(&con->work); |
ee76e073 | 620 | con_close_socket(con); |
ec302645 | 621 | mutex_unlock(&con->mutex); |
31b8006e | 622 | } |
3d14c5d2 | 623 | EXPORT_SYMBOL(ceph_con_close); |
31b8006e | 624 | |
31b8006e SW |
625 | /* |
626 | * Reopen a closed connection, with a new peer address. | |
627 | */ | |
b7a9e5dd SW |
628 | void ceph_con_open(struct ceph_connection *con, |
629 | __u8 entity_type, __u64 entity_num, | |
630 | struct ceph_entity_addr *addr) | |
31b8006e | 631 | { |
5469155f | 632 | mutex_lock(&con->mutex); |
3d14c5d2 | 633 | dout("con_open %p %s\n", con, ceph_pr_addr(&addr->in_addr)); |
8dacc7da | 634 | |
122070a2 | 635 | WARN_ON(con->state != CON_STATE_CLOSED); |
8dacc7da | 636 | con->state = CON_STATE_PREOPEN; |
a5988c49 | 637 | |
b7a9e5dd SW |
638 | con->peer_name.type = (__u8) entity_type; |
639 | con->peer_name.num = cpu_to_le64(entity_num); | |
640 | ||
31b8006e | 641 | memcpy(&con->peer_addr, addr, sizeof(*addr)); |
03c677e1 | 642 | con->delay = 0; /* reset backoff memory */ |
5469155f | 643 | mutex_unlock(&con->mutex); |
31b8006e SW |
644 | queue_con(con); |
645 | } | |
3d14c5d2 | 646 | EXPORT_SYMBOL(ceph_con_open); |
31b8006e | 647 | |
87b315a5 SW |
648 | /* |
649 | * return true if this connection ever successfully opened | |
650 | */ | |
651 | bool ceph_con_opened(struct ceph_connection *con) | |
652 | { | |
653 | return con->connect_seq > 0; | |
654 | } | |
655 | ||
31b8006e SW |
656 | /* |
657 | * initialize a new connection. | |
658 | */ | |
1bfd89f4 AE |
659 | void ceph_con_init(struct ceph_connection *con, void *private, |
660 | const struct ceph_connection_operations *ops, | |
b7a9e5dd | 661 | struct ceph_messenger *msgr) |
31b8006e SW |
662 | { |
663 | dout("con_init %p\n", con); | |
664 | memset(con, 0, sizeof(*con)); | |
1bfd89f4 AE |
665 | con->private = private; |
666 | con->ops = ops; | |
31b8006e | 667 | con->msgr = msgr; |
ce2c8903 AE |
668 | |
669 | con_sock_state_init(con); | |
670 | ||
ec302645 | 671 | mutex_init(&con->mutex); |
31b8006e SW |
672 | INIT_LIST_HEAD(&con->out_queue); |
673 | INIT_LIST_HEAD(&con->out_sent); | |
674 | INIT_DELAYED_WORK(&con->work, con_work); | |
a5988c49 | 675 | |
8dacc7da | 676 | con->state = CON_STATE_CLOSED; |
31b8006e | 677 | } |
3d14c5d2 | 678 | EXPORT_SYMBOL(ceph_con_init); |
31b8006e SW |
679 | |
680 | ||
681 | /* | |
682 | * We maintain a global counter to order connection attempts. Get | |
683 | * a unique seq greater than @gt. | |
684 | */ | |
685 | static u32 get_global_seq(struct ceph_messenger *msgr, u32 gt) | |
686 | { | |
687 | u32 ret; | |
688 | ||
689 | spin_lock(&msgr->global_seq_lock); | |
690 | if (msgr->global_seq < gt) | |
691 | msgr->global_seq = gt; | |
692 | ret = ++msgr->global_seq; | |
693 | spin_unlock(&msgr->global_seq_lock); | |
694 | return ret; | |
695 | } | |
696 | ||
e2200423 | 697 | static void con_out_kvec_reset(struct ceph_connection *con) |
859eb799 AE |
698 | { |
699 | con->out_kvec_left = 0; | |
700 | con->out_kvec_bytes = 0; | |
701 | con->out_kvec_cur = &con->out_kvec[0]; | |
702 | } | |
703 | ||
e2200423 | 704 | static void con_out_kvec_add(struct ceph_connection *con, |
859eb799 AE |
705 | size_t size, void *data) |
706 | { | |
707 | int index; | |
708 | ||
709 | index = con->out_kvec_left; | |
710 | BUG_ON(index >= ARRAY_SIZE(con->out_kvec)); | |
711 | ||
712 | con->out_kvec[index].iov_len = size; | |
713 | con->out_kvec[index].iov_base = data; | |
714 | con->out_kvec_left++; | |
715 | con->out_kvec_bytes += size; | |
716 | } | |
31b8006e | 717 | |
df6ad1f9 | 718 | #ifdef CONFIG_BLOCK |
07c09b72 AE |
719 | static void init_bio_iter(struct bio *bio, struct bio **bio_iter, |
720 | unsigned int *bio_seg) | |
df6ad1f9 AE |
721 | { |
722 | if (!bio) { | |
07c09b72 AE |
723 | *bio_iter = NULL; |
724 | *bio_seg = 0; | |
df6ad1f9 AE |
725 | return; |
726 | } | |
07c09b72 AE |
727 | *bio_iter = bio; |
728 | *bio_seg = (unsigned int) bio->bi_idx; | |
df6ad1f9 AE |
729 | } |
730 | ||
07c09b72 | 731 | static void iter_bio_next(struct bio **bio_iter, unsigned int *seg) |
df6ad1f9 AE |
732 | { |
733 | if (*bio_iter == NULL) | |
734 | return; | |
735 | ||
736 | BUG_ON(*seg >= (*bio_iter)->bi_vcnt); | |
737 | ||
738 | (*seg)++; | |
739 | if (*seg == (*bio_iter)->bi_vcnt) | |
740 | init_bio_iter((*bio_iter)->bi_next, bio_iter, seg); | |
741 | } | |
6aaa4511 AE |
742 | |
743 | /* | |
744 | * For a bio data item, a piece is whatever remains of the next | |
745 | * entry in the current bio iovec, or the first entry in the next | |
746 | * bio in the list. | |
747 | */ | |
748 | static void ceph_msg_data_bio_cursor_init(struct ceph_msg_data *data) | |
749 | { | |
750 | struct ceph_msg_data_cursor *cursor = &data->cursor; | |
751 | struct bio *bio; | |
752 | ||
753 | BUG_ON(data->type != CEPH_MSG_DATA_BIO); | |
754 | ||
755 | bio = data->bio; | |
756 | BUG_ON(!bio); | |
757 | BUG_ON(!bio->bi_vcnt); | |
758 | /* resid = bio->bi_size */ | |
759 | ||
760 | cursor->bio = bio; | |
761 | cursor->vector_index = 0; | |
762 | cursor->vector_offset = 0; | |
763 | cursor->last_piece = !bio->bi_next && bio->bi_vcnt == 1; | |
764 | } | |
765 | ||
766 | static struct page *ceph_msg_data_bio_next(struct ceph_msg_data *data, | |
767 | size_t *page_offset, | |
768 | size_t *length) | |
769 | { | |
770 | struct ceph_msg_data_cursor *cursor = &data->cursor; | |
771 | struct bio *bio; | |
772 | struct bio_vec *bio_vec; | |
773 | unsigned int index; | |
774 | ||
775 | BUG_ON(data->type != CEPH_MSG_DATA_BIO); | |
776 | ||
777 | bio = cursor->bio; | |
778 | BUG_ON(!bio); | |
779 | ||
780 | index = cursor->vector_index; | |
781 | BUG_ON(index >= (unsigned int) bio->bi_vcnt); | |
782 | ||
783 | bio_vec = &bio->bi_io_vec[index]; | |
784 | BUG_ON(cursor->vector_offset >= bio_vec->bv_len); | |
785 | *page_offset = (size_t) (bio_vec->bv_offset + cursor->vector_offset); | |
786 | BUG_ON(*page_offset >= PAGE_SIZE); | |
787 | *length = (size_t) (bio_vec->bv_len - cursor->vector_offset); | |
788 | BUG_ON(*length > PAGE_SIZE); | |
789 | ||
790 | return bio_vec->bv_page; | |
791 | } | |
792 | ||
793 | static bool ceph_msg_data_bio_advance(struct ceph_msg_data *data, size_t bytes) | |
794 | { | |
795 | struct ceph_msg_data_cursor *cursor = &data->cursor; | |
796 | struct bio *bio; | |
797 | struct bio_vec *bio_vec; | |
798 | unsigned int index; | |
799 | ||
800 | BUG_ON(data->type != CEPH_MSG_DATA_BIO); | |
801 | ||
802 | bio = cursor->bio; | |
803 | BUG_ON(!bio); | |
804 | ||
805 | index = cursor->vector_index; | |
806 | BUG_ON(index >= (unsigned int) bio->bi_vcnt); | |
807 | bio_vec = &bio->bi_io_vec[index]; | |
808 | BUG_ON(cursor->vector_offset + bytes > bio_vec->bv_len); | |
809 | ||
810 | /* Advance the cursor offset */ | |
811 | ||
812 | cursor->vector_offset += bytes; | |
813 | if (cursor->vector_offset < bio_vec->bv_len) | |
814 | return false; /* more bytes to process in this segment */ | |
815 | ||
816 | /* Move on to the next segment, and possibly the next bio */ | |
817 | ||
818 | if (++cursor->vector_index == (unsigned int) bio->bi_vcnt) { | |
819 | bio = bio->bi_next; | |
820 | cursor->bio = bio; | |
821 | cursor->vector_index = 0; | |
822 | } | |
823 | cursor->vector_offset = 0; | |
824 | ||
825 | if (!cursor->last_piece && bio && !bio->bi_next) | |
826 | if (cursor->vector_index == (unsigned int) bio->bi_vcnt - 1) | |
827 | cursor->last_piece = true; | |
828 | ||
829 | return true; | |
830 | } | |
df6ad1f9 AE |
831 | #endif |
832 | ||
e766d7b5 AE |
833 | /* |
834 | * For a page array, a piece comes from the first page in the array | |
835 | * that has not already been fully consumed. | |
836 | */ | |
837 | static void ceph_msg_data_pages_cursor_init(struct ceph_msg_data *data) | |
838 | { | |
839 | struct ceph_msg_data_cursor *cursor = &data->cursor; | |
840 | int page_count; | |
841 | ||
842 | BUG_ON(data->type != CEPH_MSG_DATA_PAGES); | |
843 | ||
844 | BUG_ON(!data->pages); | |
845 | BUG_ON(!data->length); | |
846 | ||
847 | page_count = calc_pages_for(data->alignment, (u64)data->length); | |
848 | BUG_ON(page_count > (int) USHRT_MAX); | |
849 | cursor->resid = data->length; | |
850 | cursor->page_offset = data->alignment & ~PAGE_MASK; | |
851 | cursor->page_index = 0; | |
852 | cursor->page_count = (unsigned short) page_count; | |
853 | cursor->last_piece = cursor->page_count == 1; | |
854 | } | |
855 | ||
856 | static struct page *ceph_msg_data_pages_next(struct ceph_msg_data *data, | |
857 | size_t *page_offset, | |
858 | size_t *length) | |
859 | { | |
860 | struct ceph_msg_data_cursor *cursor = &data->cursor; | |
861 | ||
862 | BUG_ON(data->type != CEPH_MSG_DATA_PAGES); | |
863 | ||
864 | BUG_ON(cursor->page_index >= cursor->page_count); | |
865 | BUG_ON(cursor->page_offset >= PAGE_SIZE); | |
866 | BUG_ON(!cursor->resid); | |
867 | ||
868 | *page_offset = cursor->page_offset; | |
869 | if (cursor->last_piece) { | |
870 | BUG_ON(*page_offset + cursor->resid > PAGE_SIZE); | |
871 | *length = cursor->resid; | |
872 | } else { | |
873 | *length = PAGE_SIZE - *page_offset; | |
874 | } | |
875 | ||
876 | return data->pages[cursor->page_index]; | |
877 | } | |
878 | ||
879 | static bool ceph_msg_data_pages_advance(struct ceph_msg_data *data, | |
880 | size_t bytes) | |
881 | { | |
882 | struct ceph_msg_data_cursor *cursor = &data->cursor; | |
883 | ||
884 | BUG_ON(data->type != CEPH_MSG_DATA_PAGES); | |
885 | ||
886 | BUG_ON(cursor->page_offset + bytes > PAGE_SIZE); | |
887 | BUG_ON(bytes > cursor->resid); | |
888 | ||
889 | /* Advance the cursor page offset */ | |
890 | ||
891 | cursor->resid -= bytes; | |
892 | cursor->page_offset += bytes; | |
893 | if (!bytes || cursor->page_offset & ~PAGE_MASK) | |
894 | return false; /* more bytes to process in the current page */ | |
895 | ||
896 | /* Move on to the next page */ | |
897 | ||
898 | BUG_ON(cursor->page_index >= cursor->page_count); | |
899 | cursor->page_offset = 0; | |
900 | cursor->page_index++; | |
901 | cursor->last_piece = cursor->page_index == cursor->page_count - 1; | |
902 | ||
903 | return true; | |
904 | } | |
905 | ||
fe38a2b6 | 906 | /* |
dd236fcb AE |
907 | * For a pagelist, a piece is whatever remains to be consumed in the |
908 | * first page in the list, or the front of the next page. | |
fe38a2b6 | 909 | */ |
dd236fcb | 910 | static void ceph_msg_data_pagelist_cursor_init(struct ceph_msg_data *data) |
fe38a2b6 AE |
911 | { |
912 | struct ceph_msg_data_cursor *cursor = &data->cursor; | |
913 | struct ceph_pagelist *pagelist; | |
914 | struct page *page; | |
915 | ||
dd236fcb | 916 | BUG_ON(data->type != CEPH_MSG_DATA_PAGELIST); |
fe38a2b6 AE |
917 | |
918 | pagelist = data->pagelist; | |
919 | BUG_ON(!pagelist); | |
920 | if (!pagelist->length) | |
921 | return; /* pagelist can be assigned but empty */ | |
922 | ||
923 | BUG_ON(list_empty(&pagelist->head)); | |
924 | page = list_first_entry(&pagelist->head, struct page, lru); | |
925 | ||
926 | cursor->page = page; | |
927 | cursor->offset = 0; | |
928 | cursor->last_piece = pagelist->length <= PAGE_SIZE; | |
929 | } | |
930 | ||
dd236fcb | 931 | static struct page *ceph_msg_data_pagelist_next(struct ceph_msg_data *data, |
fe38a2b6 | 932 | size_t *page_offset, |
dd236fcb | 933 | size_t *length) |
fe38a2b6 AE |
934 | { |
935 | struct ceph_msg_data_cursor *cursor = &data->cursor; | |
936 | struct ceph_pagelist *pagelist; | |
937 | size_t piece_end; | |
938 | ||
939 | BUG_ON(data->type != CEPH_MSG_DATA_PAGELIST); | |
940 | ||
941 | pagelist = data->pagelist; | |
942 | BUG_ON(!pagelist); | |
943 | ||
944 | BUG_ON(!cursor->page); | |
945 | BUG_ON(cursor->offset >= pagelist->length); | |
946 | ||
dd236fcb | 947 | if (cursor->last_piece) { |
fe38a2b6 AE |
948 | /* pagelist offset is always 0 */ |
949 | piece_end = pagelist->length & ~PAGE_MASK; | |
950 | if (!piece_end) | |
951 | piece_end = PAGE_SIZE; | |
952 | } else { | |
953 | piece_end = PAGE_SIZE; | |
954 | } | |
955 | *page_offset = cursor->offset & ~PAGE_MASK; | |
956 | *length = piece_end - *page_offset; | |
957 | ||
958 | return data->cursor.page; | |
959 | } | |
960 | ||
dd236fcb AE |
961 | static bool ceph_msg_data_pagelist_advance(struct ceph_msg_data *data, |
962 | size_t bytes) | |
fe38a2b6 AE |
963 | { |
964 | struct ceph_msg_data_cursor *cursor = &data->cursor; | |
965 | struct ceph_pagelist *pagelist; | |
966 | ||
967 | BUG_ON(data->type != CEPH_MSG_DATA_PAGELIST); | |
968 | ||
969 | pagelist = data->pagelist; | |
970 | BUG_ON(!pagelist); | |
971 | BUG_ON(!cursor->page); | |
972 | BUG_ON(cursor->offset + bytes > pagelist->length); | |
973 | BUG_ON((cursor->offset & ~PAGE_MASK) + bytes > PAGE_SIZE); | |
974 | ||
975 | /* Advance the cursor offset */ | |
976 | ||
977 | cursor->offset += bytes; | |
978 | /* pagelist offset is always 0 */ | |
979 | if (!bytes || cursor->offset & ~PAGE_MASK) | |
980 | return false; /* more bytes to process in the current page */ | |
981 | ||
982 | /* Move on to the next page */ | |
983 | ||
984 | BUG_ON(list_is_last(&cursor->page->lru, &pagelist->head)); | |
985 | cursor->page = list_entry_next(cursor->page, lru); | |
986 | ||
987 | /* cursor offset is at page boundary; pagelist offset is always 0 */ | |
988 | if (pagelist->length - cursor->offset <= PAGE_SIZE) | |
989 | cursor->last_piece = true; | |
990 | ||
991 | return true; | |
992 | } | |
993 | ||
dd236fcb AE |
994 | /* |
995 | * Message data is handled (sent or received) in pieces, where each | |
996 | * piece resides on a single page. The network layer might not | |
997 | * consume an entire piece at once. A data item's cursor keeps | |
998 | * track of which piece is next to process and how much remains to | |
999 | * be processed in that piece. It also tracks whether the current | |
1000 | * piece is the last one in the data item. | |
1001 | */ | |
1002 | static void ceph_msg_data_cursor_init(struct ceph_msg_data *data) | |
1003 | { | |
1004 | switch (data->type) { | |
1005 | case CEPH_MSG_DATA_PAGELIST: | |
1006 | ceph_msg_data_pagelist_cursor_init(data); | |
1007 | break; | |
e766d7b5 AE |
1008 | case CEPH_MSG_DATA_PAGES: |
1009 | ceph_msg_data_pages_cursor_init(data); | |
1010 | break; | |
dd236fcb AE |
1011 | #ifdef CONFIG_BLOCK |
1012 | case CEPH_MSG_DATA_BIO: | |
6aaa4511 AE |
1013 | ceph_msg_data_bio_cursor_init(data); |
1014 | break; | |
dd236fcb | 1015 | #endif /* CONFIG_BLOCK */ |
6aaa4511 | 1016 | case CEPH_MSG_DATA_NONE: |
dd236fcb AE |
1017 | default: |
1018 | /* BUG(); */ | |
1019 | break; | |
1020 | } | |
1021 | } | |
1022 | ||
1023 | /* | |
1024 | * Return the page containing the next piece to process for a given | |
1025 | * data item, and supply the page offset and length of that piece. | |
1026 | * Indicate whether this is the last piece in this data item. | |
1027 | */ | |
1028 | static struct page *ceph_msg_data_next(struct ceph_msg_data *data, | |
1029 | size_t *page_offset, | |
1030 | size_t *length, | |
1031 | bool *last_piece) | |
1032 | { | |
1033 | struct page *page; | |
1034 | ||
1035 | switch (data->type) { | |
1036 | case CEPH_MSG_DATA_PAGELIST: | |
1037 | page = ceph_msg_data_pagelist_next(data, page_offset, length); | |
1038 | break; | |
e766d7b5 AE |
1039 | case CEPH_MSG_DATA_PAGES: |
1040 | page = ceph_msg_data_pages_next(data, page_offset, length); | |
1041 | break; | |
dd236fcb AE |
1042 | #ifdef CONFIG_BLOCK |
1043 | case CEPH_MSG_DATA_BIO: | |
6aaa4511 AE |
1044 | page = ceph_msg_data_bio_next(data, page_offset, length); |
1045 | break; | |
dd236fcb | 1046 | #endif /* CONFIG_BLOCK */ |
6aaa4511 | 1047 | case CEPH_MSG_DATA_NONE: |
dd236fcb AE |
1048 | default: |
1049 | page = NULL; | |
1050 | break; | |
1051 | } | |
1052 | BUG_ON(!page); | |
1053 | BUG_ON(*page_offset + *length > PAGE_SIZE); | |
1054 | BUG_ON(!*length); | |
1055 | if (last_piece) | |
1056 | *last_piece = data->cursor.last_piece; | |
1057 | ||
1058 | return page; | |
1059 | } | |
1060 | ||
1061 | /* | |
1062 | * Returns true if the result moves the cursor on to the next piece | |
1063 | * of the data item. | |
1064 | */ | |
1065 | static bool ceph_msg_data_advance(struct ceph_msg_data *data, size_t bytes) | |
1066 | { | |
1067 | bool new_piece; | |
1068 | ||
1069 | switch (data->type) { | |
1070 | case CEPH_MSG_DATA_PAGELIST: | |
1071 | new_piece = ceph_msg_data_pagelist_advance(data, bytes); | |
1072 | break; | |
e766d7b5 AE |
1073 | case CEPH_MSG_DATA_PAGES: |
1074 | new_piece = ceph_msg_data_pages_advance(data, bytes); | |
1075 | break; | |
dd236fcb AE |
1076 | #ifdef CONFIG_BLOCK |
1077 | case CEPH_MSG_DATA_BIO: | |
6aaa4511 AE |
1078 | new_piece = ceph_msg_data_bio_advance(data, bytes); |
1079 | break; | |
dd236fcb | 1080 | #endif /* CONFIG_BLOCK */ |
6aaa4511 | 1081 | case CEPH_MSG_DATA_NONE: |
dd236fcb AE |
1082 | default: |
1083 | BUG(); | |
1084 | break; | |
1085 | } | |
1086 | ||
1087 | return new_piece; | |
1088 | } | |
1089 | ||
78625051 AE |
1090 | static void prepare_message_data(struct ceph_msg *msg, |
1091 | struct ceph_msg_pos *msg_pos) | |
739c905b | 1092 | { |
739c905b AE |
1093 | BUG_ON(!msg); |
1094 | BUG_ON(!msg->hdr.data_len); | |
1095 | ||
1096 | /* initialize page iterator */ | |
bae6acd9 | 1097 | msg_pos->page = 0; |
97fb1c7f | 1098 | if (ceph_msg_has_pages(msg)) |
f9e15777 | 1099 | msg_pos->page_pos = msg->p.alignment; |
739c905b | 1100 | else |
bae6acd9 | 1101 | msg_pos->page_pos = 0; |
572c588e | 1102 | #ifdef CONFIG_BLOCK |
97fb1c7f | 1103 | if (ceph_msg_has_bio(msg)) |
f9e15777 | 1104 | init_bio_iter(msg->b.bio, &msg->b.bio_iter, &msg->b.bio_seg); |
572c588e | 1105 | #endif |
bae6acd9 | 1106 | msg_pos->data_pos = 0; |
fe38a2b6 | 1107 | |
7fe1e5e5 | 1108 | /* Initialize data cursors */ |
fe38a2b6 | 1109 | |
6aaa4511 AE |
1110 | #ifdef CONFIG_BLOCK |
1111 | if (ceph_msg_has_bio(msg)) | |
1112 | ceph_msg_data_cursor_init(&msg->b); | |
1113 | #endif /* CONFIG_BLOCK */ | |
e766d7b5 AE |
1114 | if (ceph_msg_has_pages(msg)) |
1115 | ceph_msg_data_cursor_init(&msg->p); | |
7fe1e5e5 AE |
1116 | if (ceph_msg_has_pagelist(msg)) |
1117 | ceph_msg_data_cursor_init(&msg->l); | |
fe38a2b6 | 1118 | |
bae6acd9 | 1119 | msg_pos->did_page_crc = false; |
739c905b AE |
1120 | } |
1121 | ||
31b8006e SW |
1122 | /* |
1123 | * Prepare footer for currently outgoing message, and finish things | |
1124 | * off. Assumes out_kvec* are already valid.. we just add on to the end. | |
1125 | */ | |
859eb799 | 1126 | static void prepare_write_message_footer(struct ceph_connection *con) |
31b8006e SW |
1127 | { |
1128 | struct ceph_msg *m = con->out_msg; | |
859eb799 | 1129 | int v = con->out_kvec_left; |
31b8006e | 1130 | |
fd154f3c AE |
1131 | m->footer.flags |= CEPH_MSG_FOOTER_COMPLETE; |
1132 | ||
31b8006e SW |
1133 | dout("prepare_write_message_footer %p\n", con); |
1134 | con->out_kvec_is_msg = true; | |
1135 | con->out_kvec[v].iov_base = &m->footer; | |
1136 | con->out_kvec[v].iov_len = sizeof(m->footer); | |
1137 | con->out_kvec_bytes += sizeof(m->footer); | |
1138 | con->out_kvec_left++; | |
1139 | con->out_more = m->more_to_follow; | |
c86a2930 | 1140 | con->out_msg_done = true; |
31b8006e SW |
1141 | } |
1142 | ||
1143 | /* | |
1144 | * Prepare headers for the next outgoing message. | |
1145 | */ | |
1146 | static void prepare_write_message(struct ceph_connection *con) | |
1147 | { | |
1148 | struct ceph_msg *m; | |
a9a0c51a | 1149 | u32 crc; |
31b8006e | 1150 | |
e2200423 | 1151 | con_out_kvec_reset(con); |
31b8006e | 1152 | con->out_kvec_is_msg = true; |
c86a2930 | 1153 | con->out_msg_done = false; |
31b8006e SW |
1154 | |
1155 | /* Sneak an ack in there first? If we can get it into the same | |
1156 | * TCP packet that's a good thing. */ | |
1157 | if (con->in_seq > con->in_seq_acked) { | |
1158 | con->in_seq_acked = con->in_seq; | |
e2200423 | 1159 | con_out_kvec_add(con, sizeof (tag_ack), &tag_ack); |
31b8006e | 1160 | con->out_temp_ack = cpu_to_le64(con->in_seq_acked); |
e2200423 | 1161 | con_out_kvec_add(con, sizeof (con->out_temp_ack), |
859eb799 | 1162 | &con->out_temp_ack); |
31b8006e SW |
1163 | } |
1164 | ||
38941f80 | 1165 | BUG_ON(list_empty(&con->out_queue)); |
859eb799 | 1166 | m = list_first_entry(&con->out_queue, struct ceph_msg, list_head); |
c86a2930 | 1167 | con->out_msg = m; |
38941f80 | 1168 | BUG_ON(m->con != con); |
4cf9d544 SW |
1169 | |
1170 | /* put message on sent list */ | |
1171 | ceph_msg_get(m); | |
1172 | list_move_tail(&m->list_head, &con->out_sent); | |
31b8006e | 1173 | |
e84346b7 SW |
1174 | /* |
1175 | * only assign outgoing seq # if we haven't sent this message | |
1176 | * yet. if it is requeued, resend with it's original seq. | |
1177 | */ | |
1178 | if (m->needs_out_seq) { | |
1179 | m->hdr.seq = cpu_to_le64(++con->out_seq); | |
1180 | m->needs_out_seq = false; | |
1181 | } | |
31b8006e | 1182 | |
4a73ef27 | 1183 | dout("prepare_write_message %p seq %lld type %d len %d+%d+%d (%zd)\n", |
31b8006e SW |
1184 | m, con->out_seq, le16_to_cpu(m->hdr.type), |
1185 | le32_to_cpu(m->hdr.front_len), le32_to_cpu(m->hdr.middle_len), | |
f9e15777 | 1186 | le32_to_cpu(m->hdr.data_len), m->p.length); |
31b8006e SW |
1187 | BUG_ON(le32_to_cpu(m->hdr.front_len) != m->front.iov_len); |
1188 | ||
1189 | /* tag + hdr + front + middle */ | |
e2200423 AE |
1190 | con_out_kvec_add(con, sizeof (tag_msg), &tag_msg); |
1191 | con_out_kvec_add(con, sizeof (m->hdr), &m->hdr); | |
1192 | con_out_kvec_add(con, m->front.iov_len, m->front.iov_base); | |
859eb799 | 1193 | |
31b8006e | 1194 | if (m->middle) |
e2200423 | 1195 | con_out_kvec_add(con, m->middle->vec.iov_len, |
859eb799 | 1196 | m->middle->vec.iov_base); |
31b8006e SW |
1197 | |
1198 | /* fill in crc (except data pages), footer */ | |
a9a0c51a AE |
1199 | crc = crc32c(0, &m->hdr, offsetof(struct ceph_msg_header, crc)); |
1200 | con->out_msg->hdr.crc = cpu_to_le32(crc); | |
fd154f3c | 1201 | con->out_msg->footer.flags = 0; |
a9a0c51a AE |
1202 | |
1203 | crc = crc32c(0, m->front.iov_base, m->front.iov_len); | |
1204 | con->out_msg->footer.front_crc = cpu_to_le32(crc); | |
1205 | if (m->middle) { | |
1206 | crc = crc32c(0, m->middle->vec.iov_base, | |
1207 | m->middle->vec.iov_len); | |
1208 | con->out_msg->footer.middle_crc = cpu_to_le32(crc); | |
1209 | } else | |
31b8006e | 1210 | con->out_msg->footer.middle_crc = 0; |
739c905b | 1211 | dout("%s front_crc %u middle_crc %u\n", __func__, |
31b8006e SW |
1212 | le32_to_cpu(con->out_msg->footer.front_crc), |
1213 | le32_to_cpu(con->out_msg->footer.middle_crc)); | |
1214 | ||
1215 | /* is there a data payload? */ | |
739c905b | 1216 | con->out_msg->footer.data_crc = 0; |
78625051 AE |
1217 | if (m->hdr.data_len) { |
1218 | prepare_message_data(con->out_msg, &con->out_msg_pos); | |
1219 | con->out_more = 1; /* data + footer will follow */ | |
1220 | } else { | |
31b8006e | 1221 | /* no, queue up footer too and be done */ |
859eb799 | 1222 | prepare_write_message_footer(con); |
78625051 | 1223 | } |
31b8006e | 1224 | |
c9ffc77a | 1225 | con_flag_set(con, CON_FLAG_WRITE_PENDING); |
31b8006e SW |
1226 | } |
1227 | ||
1228 | /* | |
1229 | * Prepare an ack. | |
1230 | */ | |
1231 | static void prepare_write_ack(struct ceph_connection *con) | |
1232 | { | |
1233 | dout("prepare_write_ack %p %llu -> %llu\n", con, | |
1234 | con->in_seq_acked, con->in_seq); | |
1235 | con->in_seq_acked = con->in_seq; | |
1236 | ||
e2200423 | 1237 | con_out_kvec_reset(con); |
859eb799 | 1238 | |
e2200423 | 1239 | con_out_kvec_add(con, sizeof (tag_ack), &tag_ack); |
859eb799 | 1240 | |
31b8006e | 1241 | con->out_temp_ack = cpu_to_le64(con->in_seq_acked); |
e2200423 | 1242 | con_out_kvec_add(con, sizeof (con->out_temp_ack), |
859eb799 AE |
1243 | &con->out_temp_ack); |
1244 | ||
31b8006e | 1245 | con->out_more = 1; /* more will follow.. eventually.. */ |
c9ffc77a | 1246 | con_flag_set(con, CON_FLAG_WRITE_PENDING); |
31b8006e SW |
1247 | } |
1248 | ||
3a23083b SW |
1249 | /* |
1250 | * Prepare to share the seq during handshake | |
1251 | */ | |
1252 | static void prepare_write_seq(struct ceph_connection *con) | |
1253 | { | |
1254 | dout("prepare_write_seq %p %llu -> %llu\n", con, | |
1255 | con->in_seq_acked, con->in_seq); | |
1256 | con->in_seq_acked = con->in_seq; | |
1257 | ||
1258 | con_out_kvec_reset(con); | |
1259 | ||
1260 | con->out_temp_ack = cpu_to_le64(con->in_seq_acked); | |
1261 | con_out_kvec_add(con, sizeof (con->out_temp_ack), | |
1262 | &con->out_temp_ack); | |
1263 | ||
1264 | con_flag_set(con, CON_FLAG_WRITE_PENDING); | |
1265 | } | |
1266 | ||
31b8006e SW |
1267 | /* |
1268 | * Prepare to write keepalive byte. | |
1269 | */ | |
1270 | static void prepare_write_keepalive(struct ceph_connection *con) | |
1271 | { | |
1272 | dout("prepare_write_keepalive %p\n", con); | |
e2200423 AE |
1273 | con_out_kvec_reset(con); |
1274 | con_out_kvec_add(con, sizeof (tag_keepalive), &tag_keepalive); | |
c9ffc77a | 1275 | con_flag_set(con, CON_FLAG_WRITE_PENDING); |
31b8006e SW |
1276 | } |
1277 | ||
1278 | /* | |
1279 | * Connection negotiation. | |
1280 | */ | |
1281 | ||
dac1e716 AE |
1282 | static struct ceph_auth_handshake *get_connect_authorizer(struct ceph_connection *con, |
1283 | int *auth_proto) | |
4e7a5dcd | 1284 | { |
a3530df3 | 1285 | struct ceph_auth_handshake *auth; |
b1c6b980 AE |
1286 | |
1287 | if (!con->ops->get_authorizer) { | |
1288 | con->out_connect.authorizer_protocol = CEPH_AUTH_UNKNOWN; | |
1289 | con->out_connect.authorizer_len = 0; | |
729796be | 1290 | return NULL; |
b1c6b980 AE |
1291 | } |
1292 | ||
1293 | /* Can't hold the mutex while getting authorizer */ | |
ec302645 | 1294 | mutex_unlock(&con->mutex); |
dac1e716 | 1295 | auth = con->ops->get_authorizer(con, auth_proto, con->auth_retry); |
ec302645 | 1296 | mutex_lock(&con->mutex); |
4e7a5dcd | 1297 | |
a3530df3 | 1298 | if (IS_ERR(auth)) |
729796be | 1299 | return auth; |
8dacc7da | 1300 | if (con->state != CON_STATE_NEGOTIATING) |
729796be | 1301 | return ERR_PTR(-EAGAIN); |
0da5d703 | 1302 | |
8f43fb53 AE |
1303 | con->auth_reply_buf = auth->authorizer_reply_buf; |
1304 | con->auth_reply_buf_len = auth->authorizer_reply_buf_len; | |
729796be | 1305 | return auth; |
4e7a5dcd SW |
1306 | } |
1307 | ||
31b8006e SW |
1308 | /* |
1309 | * We connected to a peer and are saying hello. | |
1310 | */ | |
e825a66d | 1311 | static void prepare_write_banner(struct ceph_connection *con) |
31b8006e | 1312 | { |
e2200423 AE |
1313 | con_out_kvec_add(con, strlen(CEPH_BANNER), CEPH_BANNER); |
1314 | con_out_kvec_add(con, sizeof (con->msgr->my_enc_addr), | |
e825a66d | 1315 | &con->msgr->my_enc_addr); |
eed0ef2c | 1316 | |
eed0ef2c | 1317 | con->out_more = 0; |
c9ffc77a | 1318 | con_flag_set(con, CON_FLAG_WRITE_PENDING); |
eed0ef2c SW |
1319 | } |
1320 | ||
e825a66d | 1321 | static int prepare_write_connect(struct ceph_connection *con) |
eed0ef2c | 1322 | { |
95c96174 | 1323 | unsigned int global_seq = get_global_seq(con->msgr, 0); |
31b8006e | 1324 | int proto; |
dac1e716 | 1325 | int auth_proto; |
729796be | 1326 | struct ceph_auth_handshake *auth; |
31b8006e SW |
1327 | |
1328 | switch (con->peer_name.type) { | |
1329 | case CEPH_ENTITY_TYPE_MON: | |
1330 | proto = CEPH_MONC_PROTOCOL; | |
1331 | break; | |
1332 | case CEPH_ENTITY_TYPE_OSD: | |
1333 | proto = CEPH_OSDC_PROTOCOL; | |
1334 | break; | |
1335 | case CEPH_ENTITY_TYPE_MDS: | |
1336 | proto = CEPH_MDSC_PROTOCOL; | |
1337 | break; | |
1338 | default: | |
1339 | BUG(); | |
1340 | } | |
1341 | ||
1342 | dout("prepare_write_connect %p cseq=%d gseq=%d proto=%d\n", con, | |
1343 | con->connect_seq, global_seq, proto); | |
4e7a5dcd | 1344 | |
e825a66d | 1345 | con->out_connect.features = cpu_to_le64(con->msgr->supported_features); |
31b8006e SW |
1346 | con->out_connect.host_type = cpu_to_le32(CEPH_ENTITY_TYPE_CLIENT); |
1347 | con->out_connect.connect_seq = cpu_to_le32(con->connect_seq); | |
1348 | con->out_connect.global_seq = cpu_to_le32(global_seq); | |
1349 | con->out_connect.protocol_version = cpu_to_le32(proto); | |
1350 | con->out_connect.flags = 0; | |
31b8006e | 1351 | |
dac1e716 AE |
1352 | auth_proto = CEPH_AUTH_UNKNOWN; |
1353 | auth = get_connect_authorizer(con, &auth_proto); | |
729796be AE |
1354 | if (IS_ERR(auth)) |
1355 | return PTR_ERR(auth); | |
3da54776 | 1356 | |
dac1e716 | 1357 | con->out_connect.authorizer_protocol = cpu_to_le32(auth_proto); |
3da54776 AE |
1358 | con->out_connect.authorizer_len = auth ? |
1359 | cpu_to_le32(auth->authorizer_buf_len) : 0; | |
1360 | ||
e2200423 | 1361 | con_out_kvec_add(con, sizeof (con->out_connect), |
3da54776 AE |
1362 | &con->out_connect); |
1363 | if (auth && auth->authorizer_buf_len) | |
e2200423 | 1364 | con_out_kvec_add(con, auth->authorizer_buf_len, |
3da54776 | 1365 | auth->authorizer_buf); |
859eb799 | 1366 | |
31b8006e | 1367 | con->out_more = 0; |
c9ffc77a | 1368 | con_flag_set(con, CON_FLAG_WRITE_PENDING); |
4e7a5dcd | 1369 | |
e10c758e | 1370 | return 0; |
31b8006e SW |
1371 | } |
1372 | ||
31b8006e SW |
1373 | /* |
1374 | * write as much of pending kvecs to the socket as we can. | |
1375 | * 1 -> done | |
1376 | * 0 -> socket full, but more to do | |
1377 | * <0 -> error | |
1378 | */ | |
1379 | static int write_partial_kvec(struct ceph_connection *con) | |
1380 | { | |
1381 | int ret; | |
1382 | ||
1383 | dout("write_partial_kvec %p %d left\n", con, con->out_kvec_bytes); | |
1384 | while (con->out_kvec_bytes > 0) { | |
1385 | ret = ceph_tcp_sendmsg(con->sock, con->out_kvec_cur, | |
1386 | con->out_kvec_left, con->out_kvec_bytes, | |
1387 | con->out_more); | |
1388 | if (ret <= 0) | |
1389 | goto out; | |
1390 | con->out_kvec_bytes -= ret; | |
1391 | if (con->out_kvec_bytes == 0) | |
1392 | break; /* done */ | |
f42299e6 AE |
1393 | |
1394 | /* account for full iov entries consumed */ | |
1395 | while (ret >= con->out_kvec_cur->iov_len) { | |
1396 | BUG_ON(!con->out_kvec_left); | |
1397 | ret -= con->out_kvec_cur->iov_len; | |
1398 | con->out_kvec_cur++; | |
1399 | con->out_kvec_left--; | |
1400 | } | |
1401 | /* and for a partially-consumed entry */ | |
1402 | if (ret) { | |
1403 | con->out_kvec_cur->iov_len -= ret; | |
1404 | con->out_kvec_cur->iov_base += ret; | |
31b8006e SW |
1405 | } |
1406 | } | |
1407 | con->out_kvec_left = 0; | |
1408 | con->out_kvec_is_msg = false; | |
1409 | ret = 1; | |
1410 | out: | |
1411 | dout("write_partial_kvec %p %d left in %d kvecs ret = %d\n", con, | |
1412 | con->out_kvec_bytes, con->out_kvec_left, ret); | |
1413 | return ret; /* done! */ | |
1414 | } | |
1415 | ||
84ca8fc8 | 1416 | static void out_msg_pos_next(struct ceph_connection *con, struct page *page, |
9d2a06c2 | 1417 | size_t len, size_t sent) |
68b4476b | 1418 | { |
84ca8fc8 | 1419 | struct ceph_msg *msg = con->out_msg; |
bae6acd9 | 1420 | struct ceph_msg_pos *msg_pos = &con->out_msg_pos; |
7fe1e5e5 | 1421 | bool need_crc = false; |
68b4476b | 1422 | |
84ca8fc8 AE |
1423 | BUG_ON(!msg); |
1424 | BUG_ON(!sent); | |
68b4476b | 1425 | |
bae6acd9 AE |
1426 | msg_pos->data_pos += sent; |
1427 | msg_pos->page_pos += sent; | |
9d2a06c2 | 1428 | if (ceph_msg_has_pages(msg)) |
e766d7b5 | 1429 | need_crc = ceph_msg_data_advance(&msg->p, sent); |
7fe1e5e5 AE |
1430 | else if (ceph_msg_has_pagelist(msg)) |
1431 | need_crc = ceph_msg_data_advance(&msg->l, sent); | |
6aaa4511 AE |
1432 | #ifdef CONFIG_BLOCK |
1433 | else if (ceph_msg_has_bio(msg)) | |
1434 | need_crc = ceph_msg_data_advance(&msg->b, sent); | |
1435 | #endif /* CONFIG_BLOCK */ | |
7fe1e5e5 AE |
1436 | BUG_ON(need_crc && sent != len); |
1437 | ||
5821bd8c AE |
1438 | if (sent < len) |
1439 | return; | |
68b4476b | 1440 | |
5821bd8c | 1441 | BUG_ON(sent != len); |
bae6acd9 AE |
1442 | msg_pos->page_pos = 0; |
1443 | msg_pos->page++; | |
1444 | msg_pos->did_page_crc = false; | |
84ca8fc8 | 1445 | } |
68b4476b | 1446 | |
e788182f AE |
1447 | static void in_msg_pos_next(struct ceph_connection *con, size_t len, |
1448 | size_t received) | |
1449 | { | |
1450 | struct ceph_msg *msg = con->in_msg; | |
bae6acd9 | 1451 | struct ceph_msg_pos *msg_pos = &con->in_msg_pos; |
e788182f AE |
1452 | |
1453 | BUG_ON(!msg); | |
1454 | BUG_ON(!received); | |
1455 | ||
bae6acd9 AE |
1456 | msg_pos->data_pos += received; |
1457 | msg_pos->page_pos += received; | |
e788182f AE |
1458 | if (received < len) |
1459 | return; | |
1460 | ||
1461 | BUG_ON(received != len); | |
bae6acd9 AE |
1462 | msg_pos->page_pos = 0; |
1463 | msg_pos->page++; | |
e788182f | 1464 | #ifdef CONFIG_BLOCK |
f9e15777 AE |
1465 | if (msg->b.bio) |
1466 | iter_bio_next(&msg->b.bio_iter, &msg->b.bio_seg); | |
e788182f AE |
1467 | #endif /* CONFIG_BLOCK */ |
1468 | } | |
1469 | ||
35b62808 AE |
1470 | static u32 ceph_crc32c_page(u32 crc, struct page *page, |
1471 | unsigned int page_offset, | |
1472 | unsigned int length) | |
1473 | { | |
1474 | char *kaddr; | |
1475 | ||
1476 | kaddr = kmap(page); | |
1477 | BUG_ON(kaddr == NULL); | |
1478 | crc = crc32c(crc, kaddr + page_offset, length); | |
1479 | kunmap(page); | |
1480 | ||
1481 | return crc; | |
1482 | } | |
31b8006e SW |
1483 | /* |
1484 | * Write as much message data payload as we can. If we finish, queue | |
1485 | * up the footer. | |
1486 | * 1 -> done, footer is now queued in out_kvec[]. | |
1487 | * 0 -> socket full, but more to do | |
1488 | * <0 -> error | |
1489 | */ | |
34d2d200 | 1490 | static int write_partial_message_data(struct ceph_connection *con) |
31b8006e SW |
1491 | { |
1492 | struct ceph_msg *msg = con->out_msg; | |
bae6acd9 | 1493 | struct ceph_msg_pos *msg_pos = &con->out_msg_pos; |
95c96174 | 1494 | unsigned int data_len = le32_to_cpu(msg->hdr.data_len); |
37675b0f | 1495 | bool do_datacrc = !con->msgr->nocrc; |
31b8006e SW |
1496 | int ret; |
1497 | ||
34d2d200 | 1498 | dout("%s %p msg %p page %d offset %d\n", __func__, |
bae6acd9 | 1499 | con, msg, msg_pos->page, msg_pos->page_pos); |
31b8006e | 1500 | |
5821bd8c AE |
1501 | /* |
1502 | * Iterate through each page that contains data to be | |
1503 | * written, and send as much as possible for each. | |
1504 | * | |
1505 | * If we are calculating the data crc (the default), we will | |
1506 | * need to map the page. If we have no pages, they have | |
1507 | * been revoked, so use the zero page. | |
1508 | */ | |
bae6acd9 | 1509 | while (data_len > msg_pos->data_pos) { |
8a166d05 | 1510 | struct page *page; |
e387d525 AE |
1511 | size_t page_offset; |
1512 | size_t length; | |
8a166d05 | 1513 | bool last_piece; |
68b4476b | 1514 | |
9d2a06c2 | 1515 | if (ceph_msg_has_pages(msg)) { |
e766d7b5 AE |
1516 | page = ceph_msg_data_next(&msg->p, &page_offset, |
1517 | &length, &last_piece); | |
97fb1c7f | 1518 | } else if (ceph_msg_has_pagelist(msg)) { |
7fe1e5e5 AE |
1519 | page = ceph_msg_data_next(&msg->l, &page_offset, |
1520 | &length, &last_piece); | |
68b4476b | 1521 | #ifdef CONFIG_BLOCK |
97fb1c7f | 1522 | } else if (ceph_msg_has_bio(msg)) { |
6aaa4511 AE |
1523 | page = ceph_msg_data_next(&msg->b, &page_offset, |
1524 | &length, &last_piece); | |
68b4476b | 1525 | #endif |
31b8006e | 1526 | } else { |
8a166d05 | 1527 | size_t resid = data_len - msg_pos->data_pos; |
68b4476b | 1528 | |
8a166d05 | 1529 | page = zero_page; |
6aaa4511 | 1530 | page_offset = msg_pos->page_pos; |
8a166d05 AE |
1531 | length = PAGE_SIZE - page_offset; |
1532 | length = min(resid, length); | |
1533 | last_piece = length == resid; | |
6aaa4511 | 1534 | } |
bae6acd9 | 1535 | if (do_datacrc && !msg_pos->did_page_crc) { |
5821bd8c | 1536 | u32 crc = le32_to_cpu(msg->footer.data_crc); |
31b8006e | 1537 | |
35b62808 | 1538 | crc = ceph_crc32c_page(crc, page, page_offset, length); |
84ca8fc8 | 1539 | msg->footer.data_crc = cpu_to_le32(crc); |
bae6acd9 | 1540 | msg_pos->did_page_crc = true; |
31b8006e | 1541 | } |
e387d525 | 1542 | ret = ceph_tcp_sendpage(con->sock, page, page_offset, |
fe38a2b6 | 1543 | length, last_piece); |
31b8006e SW |
1544 | if (ret <= 0) |
1545 | goto out; | |
1546 | ||
9d2a06c2 | 1547 | out_msg_pos_next(con, page, length, (size_t) ret); |
31b8006e SW |
1548 | } |
1549 | ||
34d2d200 | 1550 | dout("%s %p msg %p done\n", __func__, con, msg); |
31b8006e SW |
1551 | |
1552 | /* prepare and queue up footer, too */ | |
37675b0f | 1553 | if (!do_datacrc) |
84ca8fc8 | 1554 | msg->footer.flags |= CEPH_MSG_FOOTER_NOCRC; |
e2200423 | 1555 | con_out_kvec_reset(con); |
859eb799 | 1556 | prepare_write_message_footer(con); |
31b8006e SW |
1557 | ret = 1; |
1558 | out: | |
1559 | return ret; | |
1560 | } | |
1561 | ||
1562 | /* | |
1563 | * write some zeros | |
1564 | */ | |
1565 | static int write_partial_skip(struct ceph_connection *con) | |
1566 | { | |
1567 | int ret; | |
1568 | ||
1569 | while (con->out_skip > 0) { | |
31739139 | 1570 | size_t size = min(con->out_skip, (int) PAGE_CACHE_SIZE); |
31b8006e | 1571 | |
e1dcb128 | 1572 | ret = ceph_tcp_sendpage(con->sock, zero_page, 0, size, true); |
31b8006e SW |
1573 | if (ret <= 0) |
1574 | goto out; | |
1575 | con->out_skip -= ret; | |
1576 | } | |
1577 | ret = 1; | |
1578 | out: | |
1579 | return ret; | |
1580 | } | |
1581 | ||
1582 | /* | |
1583 | * Prepare to read connection handshake, or an ack. | |
1584 | */ | |
eed0ef2c SW |
1585 | static void prepare_read_banner(struct ceph_connection *con) |
1586 | { | |
1587 | dout("prepare_read_banner %p\n", con); | |
1588 | con->in_base_pos = 0; | |
1589 | } | |
1590 | ||
31b8006e SW |
1591 | static void prepare_read_connect(struct ceph_connection *con) |
1592 | { | |
1593 | dout("prepare_read_connect %p\n", con); | |
1594 | con->in_base_pos = 0; | |
1595 | } | |
1596 | ||
1597 | static void prepare_read_ack(struct ceph_connection *con) | |
1598 | { | |
1599 | dout("prepare_read_ack %p\n", con); | |
1600 | con->in_base_pos = 0; | |
1601 | } | |
1602 | ||
3a23083b SW |
1603 | static void prepare_read_seq(struct ceph_connection *con) |
1604 | { | |
1605 | dout("prepare_read_seq %p\n", con); | |
1606 | con->in_base_pos = 0; | |
1607 | con->in_tag = CEPH_MSGR_TAG_SEQ; | |
1608 | } | |
1609 | ||
31b8006e SW |
1610 | static void prepare_read_tag(struct ceph_connection *con) |
1611 | { | |
1612 | dout("prepare_read_tag %p\n", con); | |
1613 | con->in_base_pos = 0; | |
1614 | con->in_tag = CEPH_MSGR_TAG_READY; | |
1615 | } | |
1616 | ||
1617 | /* | |
1618 | * Prepare to read a message. | |
1619 | */ | |
1620 | static int prepare_read_message(struct ceph_connection *con) | |
1621 | { | |
1622 | dout("prepare_read_message %p\n", con); | |
1623 | BUG_ON(con->in_msg != NULL); | |
1624 | con->in_base_pos = 0; | |
1625 | con->in_front_crc = con->in_middle_crc = con->in_data_crc = 0; | |
1626 | return 0; | |
1627 | } | |
1628 | ||
1629 | ||
1630 | static int read_partial(struct ceph_connection *con, | |
fd51653f | 1631 | int end, int size, void *object) |
31b8006e | 1632 | { |
e6cee71f AE |
1633 | while (con->in_base_pos < end) { |
1634 | int left = end - con->in_base_pos; | |
31b8006e SW |
1635 | int have = size - left; |
1636 | int ret = ceph_tcp_recvmsg(con->sock, object + have, left); | |
1637 | if (ret <= 0) | |
1638 | return ret; | |
1639 | con->in_base_pos += ret; | |
1640 | } | |
1641 | return 1; | |
1642 | } | |
1643 | ||
1644 | ||
1645 | /* | |
1646 | * Read all or part of the connect-side handshake on a new connection | |
1647 | */ | |
eed0ef2c | 1648 | static int read_partial_banner(struct ceph_connection *con) |
31b8006e | 1649 | { |
fd51653f AE |
1650 | int size; |
1651 | int end; | |
1652 | int ret; | |
31b8006e | 1653 | |
eed0ef2c | 1654 | dout("read_partial_banner %p at %d\n", con, con->in_base_pos); |
31b8006e SW |
1655 | |
1656 | /* peer's banner */ | |
fd51653f AE |
1657 | size = strlen(CEPH_BANNER); |
1658 | end = size; | |
1659 | ret = read_partial(con, end, size, con->in_banner); | |
31b8006e SW |
1660 | if (ret <= 0) |
1661 | goto out; | |
fd51653f AE |
1662 | |
1663 | size = sizeof (con->actual_peer_addr); | |
1664 | end += size; | |
1665 | ret = read_partial(con, end, size, &con->actual_peer_addr); | |
31b8006e SW |
1666 | if (ret <= 0) |
1667 | goto out; | |
fd51653f AE |
1668 | |
1669 | size = sizeof (con->peer_addr_for_me); | |
1670 | end += size; | |
1671 | ret = read_partial(con, end, size, &con->peer_addr_for_me); | |
31b8006e SW |
1672 | if (ret <= 0) |
1673 | goto out; | |
fd51653f | 1674 | |
eed0ef2c SW |
1675 | out: |
1676 | return ret; | |
1677 | } | |
1678 | ||
1679 | static int read_partial_connect(struct ceph_connection *con) | |
1680 | { | |
fd51653f AE |
1681 | int size; |
1682 | int end; | |
1683 | int ret; | |
eed0ef2c SW |
1684 | |
1685 | dout("read_partial_connect %p at %d\n", con, con->in_base_pos); | |
1686 | ||
fd51653f AE |
1687 | size = sizeof (con->in_reply); |
1688 | end = size; | |
1689 | ret = read_partial(con, end, size, &con->in_reply); | |
31b8006e SW |
1690 | if (ret <= 0) |
1691 | goto out; | |
fd51653f AE |
1692 | |
1693 | size = le32_to_cpu(con->in_reply.authorizer_len); | |
1694 | end += size; | |
1695 | ret = read_partial(con, end, size, con->auth_reply_buf); | |
4e7a5dcd SW |
1696 | if (ret <= 0) |
1697 | goto out; | |
31b8006e | 1698 | |
4e7a5dcd SW |
1699 | dout("read_partial_connect %p tag %d, con_seq = %u, g_seq = %u\n", |
1700 | con, (int)con->in_reply.tag, | |
1701 | le32_to_cpu(con->in_reply.connect_seq), | |
31b8006e SW |
1702 | le32_to_cpu(con->in_reply.global_seq)); |
1703 | out: | |
1704 | return ret; | |
eed0ef2c | 1705 | |
31b8006e SW |
1706 | } |
1707 | ||
1708 | /* | |
1709 | * Verify the hello banner looks okay. | |
1710 | */ | |
1711 | static int verify_hello(struct ceph_connection *con) | |
1712 | { | |
1713 | if (memcmp(con->in_banner, CEPH_BANNER, strlen(CEPH_BANNER))) { | |
13e38c8a | 1714 | pr_err("connect to %s got bad banner\n", |
3d14c5d2 | 1715 | ceph_pr_addr(&con->peer_addr.in_addr)); |
31b8006e SW |
1716 | con->error_msg = "protocol error, bad banner"; |
1717 | return -1; | |
1718 | } | |
1719 | return 0; | |
1720 | } | |
1721 | ||
1722 | static bool addr_is_blank(struct sockaddr_storage *ss) | |
1723 | { | |
1724 | switch (ss->ss_family) { | |
1725 | case AF_INET: | |
1726 | return ((struct sockaddr_in *)ss)->sin_addr.s_addr == 0; | |
1727 | case AF_INET6: | |
1728 | return | |
1729 | ((struct sockaddr_in6 *)ss)->sin6_addr.s6_addr32[0] == 0 && | |
1730 | ((struct sockaddr_in6 *)ss)->sin6_addr.s6_addr32[1] == 0 && | |
1731 | ((struct sockaddr_in6 *)ss)->sin6_addr.s6_addr32[2] == 0 && | |
1732 | ((struct sockaddr_in6 *)ss)->sin6_addr.s6_addr32[3] == 0; | |
1733 | } | |
1734 | return false; | |
1735 | } | |
1736 | ||
1737 | static int addr_port(struct sockaddr_storage *ss) | |
1738 | { | |
1739 | switch (ss->ss_family) { | |
1740 | case AF_INET: | |
f28bcfbe | 1741 | return ntohs(((struct sockaddr_in *)ss)->sin_port); |
31b8006e | 1742 | case AF_INET6: |
f28bcfbe | 1743 | return ntohs(((struct sockaddr_in6 *)ss)->sin6_port); |
31b8006e SW |
1744 | } |
1745 | return 0; | |
1746 | } | |
1747 | ||
1748 | static void addr_set_port(struct sockaddr_storage *ss, int p) | |
1749 | { | |
1750 | switch (ss->ss_family) { | |
1751 | case AF_INET: | |
1752 | ((struct sockaddr_in *)ss)->sin_port = htons(p); | |
a2a79609 | 1753 | break; |
31b8006e SW |
1754 | case AF_INET6: |
1755 | ((struct sockaddr_in6 *)ss)->sin6_port = htons(p); | |
a2a79609 | 1756 | break; |
31b8006e SW |
1757 | } |
1758 | } | |
1759 | ||
ee3b56f2 NW |
1760 | /* |
1761 | * Unlike other *_pton function semantics, zero indicates success. | |
1762 | */ | |
1763 | static int ceph_pton(const char *str, size_t len, struct sockaddr_storage *ss, | |
1764 | char delim, const char **ipend) | |
1765 | { | |
99f0f3b2 AE |
1766 | struct sockaddr_in *in4 = (struct sockaddr_in *) ss; |
1767 | struct sockaddr_in6 *in6 = (struct sockaddr_in6 *) ss; | |
ee3b56f2 NW |
1768 | |
1769 | memset(ss, 0, sizeof(*ss)); | |
1770 | ||
1771 | if (in4_pton(str, len, (u8 *)&in4->sin_addr.s_addr, delim, ipend)) { | |
1772 | ss->ss_family = AF_INET; | |
1773 | return 0; | |
1774 | } | |
1775 | ||
1776 | if (in6_pton(str, len, (u8 *)&in6->sin6_addr.s6_addr, delim, ipend)) { | |
1777 | ss->ss_family = AF_INET6; | |
1778 | return 0; | |
1779 | } | |
1780 | ||
1781 | return -EINVAL; | |
1782 | } | |
1783 | ||
1784 | /* | |
1785 | * Extract hostname string and resolve using kernel DNS facility. | |
1786 | */ | |
1787 | #ifdef CONFIG_CEPH_LIB_USE_DNS_RESOLVER | |
1788 | static int ceph_dns_resolve_name(const char *name, size_t namelen, | |
1789 | struct sockaddr_storage *ss, char delim, const char **ipend) | |
1790 | { | |
1791 | const char *end, *delim_p; | |
1792 | char *colon_p, *ip_addr = NULL; | |
1793 | int ip_len, ret; | |
1794 | ||
1795 | /* | |
1796 | * The end of the hostname occurs immediately preceding the delimiter or | |
1797 | * the port marker (':') where the delimiter takes precedence. | |
1798 | */ | |
1799 | delim_p = memchr(name, delim, namelen); | |
1800 | colon_p = memchr(name, ':', namelen); | |
1801 | ||
1802 | if (delim_p && colon_p) | |
1803 | end = delim_p < colon_p ? delim_p : colon_p; | |
1804 | else if (!delim_p && colon_p) | |
1805 | end = colon_p; | |
1806 | else { | |
1807 | end = delim_p; | |
1808 | if (!end) /* case: hostname:/ */ | |
1809 | end = name + namelen; | |
1810 | } | |
1811 | ||
1812 | if (end <= name) | |
1813 | return -EINVAL; | |
1814 | ||
1815 | /* do dns_resolve upcall */ | |
1816 | ip_len = dns_query(NULL, name, end - name, NULL, &ip_addr, NULL); | |
1817 | if (ip_len > 0) | |
1818 | ret = ceph_pton(ip_addr, ip_len, ss, -1, NULL); | |
1819 | else | |
1820 | ret = -ESRCH; | |
1821 | ||
1822 | kfree(ip_addr); | |
1823 | ||
1824 | *ipend = end; | |
1825 | ||
1826 | pr_info("resolve '%.*s' (ret=%d): %s\n", (int)(end - name), name, | |
1827 | ret, ret ? "failed" : ceph_pr_addr(ss)); | |
1828 | ||
1829 | return ret; | |
1830 | } | |
1831 | #else | |
1832 | static inline int ceph_dns_resolve_name(const char *name, size_t namelen, | |
1833 | struct sockaddr_storage *ss, char delim, const char **ipend) | |
1834 | { | |
1835 | return -EINVAL; | |
1836 | } | |
1837 | #endif | |
1838 | ||
1839 | /* | |
1840 | * Parse a server name (IP or hostname). If a valid IP address is not found | |
1841 | * then try to extract a hostname to resolve using userspace DNS upcall. | |
1842 | */ | |
1843 | static int ceph_parse_server_name(const char *name, size_t namelen, | |
1844 | struct sockaddr_storage *ss, char delim, const char **ipend) | |
1845 | { | |
1846 | int ret; | |
1847 | ||
1848 | ret = ceph_pton(name, namelen, ss, delim, ipend); | |
1849 | if (ret) | |
1850 | ret = ceph_dns_resolve_name(name, namelen, ss, delim, ipend); | |
1851 | ||
1852 | return ret; | |
1853 | } | |
1854 | ||
31b8006e SW |
1855 | /* |
1856 | * Parse an ip[:port] list into an addr array. Use the default | |
1857 | * monitor port if a port isn't specified. | |
1858 | */ | |
1859 | int ceph_parse_ips(const char *c, const char *end, | |
1860 | struct ceph_entity_addr *addr, | |
1861 | int max_count, int *count) | |
1862 | { | |
ee3b56f2 | 1863 | int i, ret = -EINVAL; |
31b8006e SW |
1864 | const char *p = c; |
1865 | ||
1866 | dout("parse_ips on '%.*s'\n", (int)(end-c), c); | |
1867 | for (i = 0; i < max_count; i++) { | |
1868 | const char *ipend; | |
1869 | struct sockaddr_storage *ss = &addr[i].in_addr; | |
31b8006e | 1870 | int port; |
39139f64 SW |
1871 | char delim = ','; |
1872 | ||
1873 | if (*p == '[') { | |
1874 | delim = ']'; | |
1875 | p++; | |
1876 | } | |
31b8006e | 1877 | |
ee3b56f2 NW |
1878 | ret = ceph_parse_server_name(p, end - p, ss, delim, &ipend); |
1879 | if (ret) | |
31b8006e | 1880 | goto bad; |
ee3b56f2 NW |
1881 | ret = -EINVAL; |
1882 | ||
31b8006e SW |
1883 | p = ipend; |
1884 | ||
39139f64 SW |
1885 | if (delim == ']') { |
1886 | if (*p != ']') { | |
1887 | dout("missing matching ']'\n"); | |
1888 | goto bad; | |
1889 | } | |
1890 | p++; | |
1891 | } | |
1892 | ||
31b8006e SW |
1893 | /* port? */ |
1894 | if (p < end && *p == ':') { | |
1895 | port = 0; | |
1896 | p++; | |
1897 | while (p < end && *p >= '0' && *p <= '9') { | |
1898 | port = (port * 10) + (*p - '0'); | |
1899 | p++; | |
1900 | } | |
1901 | if (port > 65535 || port == 0) | |
1902 | goto bad; | |
1903 | } else { | |
1904 | port = CEPH_MON_PORT; | |
1905 | } | |
1906 | ||
1907 | addr_set_port(ss, port); | |
1908 | ||
3d14c5d2 | 1909 | dout("parse_ips got %s\n", ceph_pr_addr(ss)); |
31b8006e SW |
1910 | |
1911 | if (p == end) | |
1912 | break; | |
1913 | if (*p != ',') | |
1914 | goto bad; | |
1915 | p++; | |
1916 | } | |
1917 | ||
1918 | if (p != end) | |
1919 | goto bad; | |
1920 | ||
1921 | if (count) | |
1922 | *count = i + 1; | |
1923 | return 0; | |
1924 | ||
1925 | bad: | |
39139f64 | 1926 | pr_err("parse_ips bad ip '%.*s'\n", (int)(end - c), c); |
ee3b56f2 | 1927 | return ret; |
31b8006e | 1928 | } |
3d14c5d2 | 1929 | EXPORT_SYMBOL(ceph_parse_ips); |
31b8006e | 1930 | |
eed0ef2c | 1931 | static int process_banner(struct ceph_connection *con) |
31b8006e | 1932 | { |
eed0ef2c | 1933 | dout("process_banner on %p\n", con); |
31b8006e SW |
1934 | |
1935 | if (verify_hello(con) < 0) | |
1936 | return -1; | |
1937 | ||
63f2d211 SW |
1938 | ceph_decode_addr(&con->actual_peer_addr); |
1939 | ceph_decode_addr(&con->peer_addr_for_me); | |
1940 | ||
31b8006e SW |
1941 | /* |
1942 | * Make sure the other end is who we wanted. note that the other | |
1943 | * end may not yet know their ip address, so if it's 0.0.0.0, give | |
1944 | * them the benefit of the doubt. | |
1945 | */ | |
103e2d3a SW |
1946 | if (memcmp(&con->peer_addr, &con->actual_peer_addr, |
1947 | sizeof(con->peer_addr)) != 0 && | |
31b8006e SW |
1948 | !(addr_is_blank(&con->actual_peer_addr.in_addr) && |
1949 | con->actual_peer_addr.nonce == con->peer_addr.nonce)) { | |
cd84db6e | 1950 | pr_warning("wrong peer, want %s/%d, got %s/%d\n", |
3d14c5d2 | 1951 | ceph_pr_addr(&con->peer_addr.in_addr), |
cd84db6e | 1952 | (int)le32_to_cpu(con->peer_addr.nonce), |
3d14c5d2 | 1953 | ceph_pr_addr(&con->actual_peer_addr.in_addr), |
cd84db6e | 1954 | (int)le32_to_cpu(con->actual_peer_addr.nonce)); |
58bb3b37 | 1955 | con->error_msg = "wrong peer at address"; |
31b8006e SW |
1956 | return -1; |
1957 | } | |
1958 | ||
1959 | /* | |
1960 | * did we learn our address? | |
1961 | */ | |
1962 | if (addr_is_blank(&con->msgr->inst.addr.in_addr)) { | |
1963 | int port = addr_port(&con->msgr->inst.addr.in_addr); | |
1964 | ||
1965 | memcpy(&con->msgr->inst.addr.in_addr, | |
1966 | &con->peer_addr_for_me.in_addr, | |
1967 | sizeof(con->peer_addr_for_me.in_addr)); | |
1968 | addr_set_port(&con->msgr->inst.addr.in_addr, port); | |
63f2d211 | 1969 | encode_my_addr(con->msgr); |
eed0ef2c | 1970 | dout("process_banner learned my addr is %s\n", |
3d14c5d2 | 1971 | ceph_pr_addr(&con->msgr->inst.addr.in_addr)); |
31b8006e SW |
1972 | } |
1973 | ||
eed0ef2c SW |
1974 | return 0; |
1975 | } | |
1976 | ||
1977 | static int process_connect(struct ceph_connection *con) | |
1978 | { | |
3d14c5d2 YS |
1979 | u64 sup_feat = con->msgr->supported_features; |
1980 | u64 req_feat = con->msgr->required_features; | |
04a419f9 | 1981 | u64 server_feat = le64_to_cpu(con->in_reply.features); |
0da5d703 | 1982 | int ret; |
04a419f9 | 1983 | |
eed0ef2c SW |
1984 | dout("process_connect on %p tag %d\n", con, (int)con->in_tag); |
1985 | ||
31b8006e | 1986 | switch (con->in_reply.tag) { |
04a419f9 SW |
1987 | case CEPH_MSGR_TAG_FEATURES: |
1988 | pr_err("%s%lld %s feature set mismatch," | |
1989 | " my %llx < server's %llx, missing %llx\n", | |
1990 | ENTITY_NAME(con->peer_name), | |
3d14c5d2 | 1991 | ceph_pr_addr(&con->peer_addr.in_addr), |
04a419f9 SW |
1992 | sup_feat, server_feat, server_feat & ~sup_feat); |
1993 | con->error_msg = "missing required protocol features"; | |
0fa6ebc6 | 1994 | reset_connection(con); |
04a419f9 SW |
1995 | return -1; |
1996 | ||
31b8006e | 1997 | case CEPH_MSGR_TAG_BADPROTOVER: |
31b8006e SW |
1998 | pr_err("%s%lld %s protocol version mismatch," |
1999 | " my %d != server's %d\n", | |
2000 | ENTITY_NAME(con->peer_name), | |
3d14c5d2 | 2001 | ceph_pr_addr(&con->peer_addr.in_addr), |
31b8006e SW |
2002 | le32_to_cpu(con->out_connect.protocol_version), |
2003 | le32_to_cpu(con->in_reply.protocol_version)); | |
2004 | con->error_msg = "protocol version mismatch"; | |
0fa6ebc6 | 2005 | reset_connection(con); |
31b8006e SW |
2006 | return -1; |
2007 | ||
4e7a5dcd SW |
2008 | case CEPH_MSGR_TAG_BADAUTHORIZER: |
2009 | con->auth_retry++; | |
2010 | dout("process_connect %p got BADAUTHORIZER attempt %d\n", con, | |
2011 | con->auth_retry); | |
2012 | if (con->auth_retry == 2) { | |
2013 | con->error_msg = "connect authorization failure"; | |
4e7a5dcd SW |
2014 | return -1; |
2015 | } | |
6d4221b5 | 2016 | con_out_kvec_reset(con); |
e825a66d | 2017 | ret = prepare_write_connect(con); |
0da5d703 SW |
2018 | if (ret < 0) |
2019 | return ret; | |
63733a0f | 2020 | prepare_read_connect(con); |
4e7a5dcd | 2021 | break; |
31b8006e SW |
2022 | |
2023 | case CEPH_MSGR_TAG_RESETSESSION: | |
2024 | /* | |
2025 | * If we connected with a large connect_seq but the peer | |
2026 | * has no record of a session with us (no connection, or | |
2027 | * connect_seq == 0), they will send RESETSESION to indicate | |
2028 | * that they must have reset their session, and may have | |
2029 | * dropped messages. | |
2030 | */ | |
2031 | dout("process_connect got RESET peer seq %u\n", | |
5bdca4e0 | 2032 | le32_to_cpu(con->in_reply.connect_seq)); |
31b8006e SW |
2033 | pr_err("%s%lld %s connection reset\n", |
2034 | ENTITY_NAME(con->peer_name), | |
3d14c5d2 | 2035 | ceph_pr_addr(&con->peer_addr.in_addr)); |
31b8006e | 2036 | reset_connection(con); |
6d4221b5 | 2037 | con_out_kvec_reset(con); |
5a0f8fdd AE |
2038 | ret = prepare_write_connect(con); |
2039 | if (ret < 0) | |
2040 | return ret; | |
31b8006e SW |
2041 | prepare_read_connect(con); |
2042 | ||
2043 | /* Tell ceph about it. */ | |
ec302645 | 2044 | mutex_unlock(&con->mutex); |
31b8006e SW |
2045 | pr_info("reset on %s%lld\n", ENTITY_NAME(con->peer_name)); |
2046 | if (con->ops->peer_reset) | |
2047 | con->ops->peer_reset(con); | |
ec302645 | 2048 | mutex_lock(&con->mutex); |
8dacc7da | 2049 | if (con->state != CON_STATE_NEGOTIATING) |
0da5d703 | 2050 | return -EAGAIN; |
31b8006e SW |
2051 | break; |
2052 | ||
2053 | case CEPH_MSGR_TAG_RETRY_SESSION: | |
2054 | /* | |
2055 | * If we sent a smaller connect_seq than the peer has, try | |
2056 | * again with a larger value. | |
2057 | */ | |
5bdca4e0 | 2058 | dout("process_connect got RETRY_SESSION my seq %u, peer %u\n", |
31b8006e | 2059 | le32_to_cpu(con->out_connect.connect_seq), |
5bdca4e0 SW |
2060 | le32_to_cpu(con->in_reply.connect_seq)); |
2061 | con->connect_seq = le32_to_cpu(con->in_reply.connect_seq); | |
6d4221b5 | 2062 | con_out_kvec_reset(con); |
5a0f8fdd AE |
2063 | ret = prepare_write_connect(con); |
2064 | if (ret < 0) | |
2065 | return ret; | |
31b8006e SW |
2066 | prepare_read_connect(con); |
2067 | break; | |
2068 | ||
2069 | case CEPH_MSGR_TAG_RETRY_GLOBAL: | |
2070 | /* | |
2071 | * If we sent a smaller global_seq than the peer has, try | |
2072 | * again with a larger value. | |
2073 | */ | |
eed0ef2c | 2074 | dout("process_connect got RETRY_GLOBAL my %u peer_gseq %u\n", |
31b8006e | 2075 | con->peer_global_seq, |
5bdca4e0 | 2076 | le32_to_cpu(con->in_reply.global_seq)); |
31b8006e | 2077 | get_global_seq(con->msgr, |
5bdca4e0 | 2078 | le32_to_cpu(con->in_reply.global_seq)); |
6d4221b5 | 2079 | con_out_kvec_reset(con); |
5a0f8fdd AE |
2080 | ret = prepare_write_connect(con); |
2081 | if (ret < 0) | |
2082 | return ret; | |
31b8006e SW |
2083 | prepare_read_connect(con); |
2084 | break; | |
2085 | ||
3a23083b | 2086 | case CEPH_MSGR_TAG_SEQ: |
31b8006e | 2087 | case CEPH_MSGR_TAG_READY: |
04a419f9 SW |
2088 | if (req_feat & ~server_feat) { |
2089 | pr_err("%s%lld %s protocol feature mismatch," | |
2090 | " my required %llx > server's %llx, need %llx\n", | |
2091 | ENTITY_NAME(con->peer_name), | |
3d14c5d2 | 2092 | ceph_pr_addr(&con->peer_addr.in_addr), |
04a419f9 SW |
2093 | req_feat, server_feat, req_feat & ~server_feat); |
2094 | con->error_msg = "missing required protocol features"; | |
0fa6ebc6 | 2095 | reset_connection(con); |
04a419f9 SW |
2096 | return -1; |
2097 | } | |
8dacc7da | 2098 | |
122070a2 | 2099 | WARN_ON(con->state != CON_STATE_NEGOTIATING); |
8dacc7da | 2100 | con->state = CON_STATE_OPEN; |
20e55c4c | 2101 | con->auth_retry = 0; /* we authenticated; clear flag */ |
31b8006e SW |
2102 | con->peer_global_seq = le32_to_cpu(con->in_reply.global_seq); |
2103 | con->connect_seq++; | |
aba558e2 | 2104 | con->peer_features = server_feat; |
31b8006e SW |
2105 | dout("process_connect got READY gseq %d cseq %d (%d)\n", |
2106 | con->peer_global_seq, | |
2107 | le32_to_cpu(con->in_reply.connect_seq), | |
2108 | con->connect_seq); | |
2109 | WARN_ON(con->connect_seq != | |
2110 | le32_to_cpu(con->in_reply.connect_seq)); | |
92ac41d0 SW |
2111 | |
2112 | if (con->in_reply.flags & CEPH_MSG_CONNECT_LOSSY) | |
c9ffc77a | 2113 | con_flag_set(con, CON_FLAG_LOSSYTX); |
92ac41d0 | 2114 | |
85effe18 | 2115 | con->delay = 0; /* reset backoff memory */ |
92ac41d0 | 2116 | |
3a23083b SW |
2117 | if (con->in_reply.tag == CEPH_MSGR_TAG_SEQ) { |
2118 | prepare_write_seq(con); | |
2119 | prepare_read_seq(con); | |
2120 | } else { | |
2121 | prepare_read_tag(con); | |
2122 | } | |
31b8006e SW |
2123 | break; |
2124 | ||
2125 | case CEPH_MSGR_TAG_WAIT: | |
2126 | /* | |
2127 | * If there is a connection race (we are opening | |
2128 | * connections to each other), one of us may just have | |
2129 | * to WAIT. This shouldn't happen if we are the | |
2130 | * client. | |
2131 | */ | |
04177882 SW |
2132 | pr_err("process_connect got WAIT as client\n"); |
2133 | con->error_msg = "protocol error, got WAIT as client"; | |
2134 | return -1; | |
31b8006e SW |
2135 | |
2136 | default: | |
2137 | pr_err("connect protocol error, will retry\n"); | |
2138 | con->error_msg = "protocol error, garbage tag during connect"; | |
2139 | return -1; | |
2140 | } | |
2141 | return 0; | |
2142 | } | |
2143 | ||
2144 | ||
2145 | /* | |
2146 | * read (part of) an ack | |
2147 | */ | |
2148 | static int read_partial_ack(struct ceph_connection *con) | |
2149 | { | |
fd51653f AE |
2150 | int size = sizeof (con->in_temp_ack); |
2151 | int end = size; | |
31b8006e | 2152 | |
fd51653f | 2153 | return read_partial(con, end, size, &con->in_temp_ack); |
31b8006e SW |
2154 | } |
2155 | ||
31b8006e SW |
2156 | /* |
2157 | * We can finally discard anything that's been acked. | |
2158 | */ | |
2159 | static void process_ack(struct ceph_connection *con) | |
2160 | { | |
2161 | struct ceph_msg *m; | |
2162 | u64 ack = le64_to_cpu(con->in_temp_ack); | |
2163 | u64 seq; | |
2164 | ||
31b8006e SW |
2165 | while (!list_empty(&con->out_sent)) { |
2166 | m = list_first_entry(&con->out_sent, struct ceph_msg, | |
2167 | list_head); | |
2168 | seq = le64_to_cpu(m->hdr.seq); | |
2169 | if (seq > ack) | |
2170 | break; | |
2171 | dout("got ack for seq %llu type %d at %p\n", seq, | |
2172 | le16_to_cpu(m->hdr.type), m); | |
4cf9d544 | 2173 | m->ack_stamp = jiffies; |
31b8006e SW |
2174 | ceph_msg_remove(m); |
2175 | } | |
31b8006e SW |
2176 | prepare_read_tag(con); |
2177 | } | |
2178 | ||
2179 | ||
2450418c | 2180 | static int read_partial_message_section(struct ceph_connection *con, |
213c99ee SW |
2181 | struct kvec *section, |
2182 | unsigned int sec_len, u32 *crc) | |
2450418c | 2183 | { |
68b4476b | 2184 | int ret, left; |
2450418c YS |
2185 | |
2186 | BUG_ON(!section); | |
2187 | ||
2188 | while (section->iov_len < sec_len) { | |
2189 | BUG_ON(section->iov_base == NULL); | |
2190 | left = sec_len - section->iov_len; | |
2191 | ret = ceph_tcp_recvmsg(con->sock, (char *)section->iov_base + | |
2192 | section->iov_len, left); | |
2193 | if (ret <= 0) | |
2194 | return ret; | |
2195 | section->iov_len += ret; | |
2450418c | 2196 | } |
fe3ad593 AE |
2197 | if (section->iov_len == sec_len) |
2198 | *crc = crc32c(0, section->iov_base, section->iov_len); | |
31b8006e | 2199 | |
2450418c YS |
2200 | return 1; |
2201 | } | |
31b8006e | 2202 | |
4740a623 | 2203 | static int ceph_con_in_msg_alloc(struct ceph_connection *con, int *skip); |
68b4476b YS |
2204 | |
2205 | static int read_partial_message_pages(struct ceph_connection *con, | |
95c96174 | 2206 | unsigned int data_len, bool do_datacrc) |
68b4476b | 2207 | { |
28a89dde | 2208 | struct ceph_msg *msg = con->in_msg; |
bae6acd9 | 2209 | struct ceph_msg_pos *msg_pos = &con->in_msg_pos; |
28a89dde | 2210 | struct page **pages; |
e788182f | 2211 | struct page *page; |
afb3d90e AE |
2212 | size_t page_offset; |
2213 | size_t length; | |
2214 | unsigned int left; | |
68b4476b | 2215 | int ret; |
68b4476b | 2216 | |
68b4476b | 2217 | /* (page) data */ |
28a89dde | 2218 | pages = msg->p.pages; |
68b4476b | 2219 | BUG_ON(pages == NULL); |
bae6acd9 | 2220 | page = pages[msg_pos->page]; |
afb3d90e AE |
2221 | page_offset = msg_pos->page_pos; |
2222 | BUG_ON(msg_pos->data_pos >= data_len); | |
2223 | left = data_len - msg_pos->data_pos; | |
2224 | BUG_ON(page_offset >= PAGE_SIZE); | |
2225 | length = min_t(unsigned int, PAGE_SIZE - page_offset, left); | |
2226 | ||
2227 | ret = ceph_tcp_recvpage(con->sock, page, page_offset, length); | |
68b4476b YS |
2228 | if (ret <= 0) |
2229 | return ret; | |
e788182f | 2230 | |
35b62808 AE |
2231 | if (do_datacrc) |
2232 | con->in_data_crc = ceph_crc32c_page(con->in_data_crc, page, | |
2233 | page_offset, ret); | |
afb3d90e AE |
2234 | |
2235 | in_msg_pos_next(con, length, ret); | |
68b4476b YS |
2236 | |
2237 | return ret; | |
2238 | } | |
2239 | ||
2240 | #ifdef CONFIG_BLOCK | |
2241 | static int read_partial_message_bio(struct ceph_connection *con, | |
95c96174 | 2242 | unsigned int data_len, bool do_datacrc) |
68b4476b | 2243 | { |
b3d56fab | 2244 | struct ceph_msg *msg = con->in_msg; |
bae6acd9 | 2245 | struct ceph_msg_pos *msg_pos = &con->in_msg_pos; |
b3d56fab | 2246 | struct bio_vec *bv; |
e788182f | 2247 | struct page *page; |
afb3d90e AE |
2248 | size_t page_offset; |
2249 | size_t length; | |
2250 | unsigned int left; | |
2251 | int ret; | |
68b4476b | 2252 | |
b3d56fab | 2253 | BUG_ON(!msg); |
f9e15777 AE |
2254 | BUG_ON(!msg->b.bio_iter); |
2255 | bv = bio_iovec_idx(msg->b.bio_iter, msg->b.bio_seg); | |
e788182f | 2256 | page = bv->bv_page; |
afb3d90e AE |
2257 | page_offset = bv->bv_offset + msg_pos->page_pos; |
2258 | BUG_ON(msg_pos->data_pos >= data_len); | |
2259 | left = data_len - msg_pos->data_pos; | |
2260 | BUG_ON(msg_pos->page_pos >= bv->bv_len); | |
2261 | length = min_t(unsigned int, bv->bv_len - msg_pos->page_pos, left); | |
68b4476b | 2262 | |
afb3d90e | 2263 | ret = ceph_tcp_recvpage(con->sock, page, page_offset, length); |
68b4476b YS |
2264 | if (ret <= 0) |
2265 | return ret; | |
e788182f | 2266 | |
35b62808 AE |
2267 | if (do_datacrc) |
2268 | con->in_data_crc = ceph_crc32c_page(con->in_data_crc, page, | |
2269 | page_offset, ret); | |
afb3d90e AE |
2270 | |
2271 | in_msg_pos_next(con, length, ret); | |
68b4476b YS |
2272 | |
2273 | return ret; | |
2274 | } | |
2275 | #endif | |
2276 | ||
34d2d200 AE |
2277 | static int read_partial_msg_data(struct ceph_connection *con) |
2278 | { | |
2279 | struct ceph_msg *msg = con->in_msg; | |
2280 | struct ceph_msg_pos *msg_pos = &con->in_msg_pos; | |
2281 | const bool do_datacrc = !con->msgr->nocrc; | |
2282 | unsigned int data_len; | |
2283 | int ret; | |
2284 | ||
2285 | BUG_ON(!msg); | |
2286 | ||
2287 | data_len = le32_to_cpu(con->in_hdr.data_len); | |
2288 | while (msg_pos->data_pos < data_len) { | |
97fb1c7f | 2289 | if (ceph_msg_has_pages(msg)) { |
28a89dde AE |
2290 | ret = read_partial_message_pages(con, data_len, |
2291 | do_datacrc); | |
34d2d200 AE |
2292 | if (ret <= 0) |
2293 | return ret; | |
2294 | #ifdef CONFIG_BLOCK | |
97fb1c7f | 2295 | } else if (ceph_msg_has_bio(msg)) { |
34d2d200 AE |
2296 | ret = read_partial_message_bio(con, |
2297 | data_len, do_datacrc); | |
2298 | if (ret <= 0) | |
2299 | return ret; | |
2300 | #endif | |
2301 | } else { | |
2302 | BUG_ON(1); | |
2303 | } | |
2304 | } | |
2305 | ||
2306 | return 1; /* must return > 0 to indicate success */ | |
2307 | } | |
2308 | ||
31b8006e SW |
2309 | /* |
2310 | * read (part of) a message. | |
2311 | */ | |
2312 | static int read_partial_message(struct ceph_connection *con) | |
2313 | { | |
2314 | struct ceph_msg *m = con->in_msg; | |
fd51653f AE |
2315 | int size; |
2316 | int end; | |
31b8006e | 2317 | int ret; |
95c96174 | 2318 | unsigned int front_len, middle_len, data_len; |
37675b0f | 2319 | bool do_datacrc = !con->msgr->nocrc; |
ae18756b | 2320 | u64 seq; |
fe3ad593 | 2321 | u32 crc; |
31b8006e SW |
2322 | |
2323 | dout("read_partial_message con %p msg %p\n", con, m); | |
2324 | ||
2325 | /* header */ | |
fd51653f AE |
2326 | size = sizeof (con->in_hdr); |
2327 | end = size; | |
2328 | ret = read_partial(con, end, size, &con->in_hdr); | |
57dac9d1 AE |
2329 | if (ret <= 0) |
2330 | return ret; | |
fe3ad593 AE |
2331 | |
2332 | crc = crc32c(0, &con->in_hdr, offsetof(struct ceph_msg_header, crc)); | |
2333 | if (cpu_to_le32(crc) != con->in_hdr.crc) { | |
2334 | pr_err("read_partial_message bad hdr " | |
2335 | " crc %u != expected %u\n", | |
2336 | crc, con->in_hdr.crc); | |
2337 | return -EBADMSG; | |
2338 | } | |
2339 | ||
31b8006e SW |
2340 | front_len = le32_to_cpu(con->in_hdr.front_len); |
2341 | if (front_len > CEPH_MSG_MAX_FRONT_LEN) | |
2342 | return -EIO; | |
2343 | middle_len = le32_to_cpu(con->in_hdr.middle_len); | |
7b11ba37 | 2344 | if (middle_len > CEPH_MSG_MAX_MIDDLE_LEN) |
31b8006e SW |
2345 | return -EIO; |
2346 | data_len = le32_to_cpu(con->in_hdr.data_len); | |
2347 | if (data_len > CEPH_MSG_MAX_DATA_LEN) | |
2348 | return -EIO; | |
2349 | ||
ae18756b SW |
2350 | /* verify seq# */ |
2351 | seq = le64_to_cpu(con->in_hdr.seq); | |
2352 | if ((s64)seq - (s64)con->in_seq < 1) { | |
df9f86fa | 2353 | pr_info("skipping %s%lld %s seq %lld expected %lld\n", |
ae18756b | 2354 | ENTITY_NAME(con->peer_name), |
3d14c5d2 | 2355 | ceph_pr_addr(&con->peer_addr.in_addr), |
ae18756b SW |
2356 | seq, con->in_seq + 1); |
2357 | con->in_base_pos = -front_len - middle_len - data_len - | |
2358 | sizeof(m->footer); | |
2359 | con->in_tag = CEPH_MSGR_TAG_READY; | |
ae18756b SW |
2360 | return 0; |
2361 | } else if ((s64)seq - (s64)con->in_seq > 1) { | |
2362 | pr_err("read_partial_message bad seq %lld expected %lld\n", | |
2363 | seq, con->in_seq + 1); | |
2364 | con->error_msg = "bad message sequence # for incoming message"; | |
2365 | return -EBADMSG; | |
2366 | } | |
2367 | ||
31b8006e SW |
2368 | /* allocate message? */ |
2369 | if (!con->in_msg) { | |
4740a623 SW |
2370 | int skip = 0; |
2371 | ||
31b8006e | 2372 | dout("got hdr type %d front %d data %d\n", con->in_hdr.type, |
6ebc8b32 | 2373 | front_len, data_len); |
4740a623 SW |
2374 | ret = ceph_con_in_msg_alloc(con, &skip); |
2375 | if (ret < 0) | |
2376 | return ret; | |
2450418c | 2377 | if (skip) { |
31b8006e | 2378 | /* skip this message */ |
a79832f2 | 2379 | dout("alloc_msg said skip message\n"); |
ae32be31 | 2380 | BUG_ON(con->in_msg); |
31b8006e SW |
2381 | con->in_base_pos = -front_len - middle_len - data_len - |
2382 | sizeof(m->footer); | |
2383 | con->in_tag = CEPH_MSGR_TAG_READY; | |
684be25c | 2384 | con->in_seq++; |
31b8006e SW |
2385 | return 0; |
2386 | } | |
38941f80 | 2387 | |
4740a623 | 2388 | BUG_ON(!con->in_msg); |
38941f80 | 2389 | BUG_ON(con->in_msg->con != con); |
31b8006e SW |
2390 | m = con->in_msg; |
2391 | m->front.iov_len = 0; /* haven't read it yet */ | |
2450418c YS |
2392 | if (m->middle) |
2393 | m->middle->vec.iov_len = 0; | |
9d7f0f13 | 2394 | |
78625051 | 2395 | /* prepare for data payload, if any */ |
a4107026 | 2396 | |
78625051 AE |
2397 | if (data_len) |
2398 | prepare_message_data(con->in_msg, &con->in_msg_pos); | |
31b8006e SW |
2399 | } |
2400 | ||
2401 | /* front */ | |
2450418c YS |
2402 | ret = read_partial_message_section(con, &m->front, front_len, |
2403 | &con->in_front_crc); | |
2404 | if (ret <= 0) | |
2405 | return ret; | |
31b8006e SW |
2406 | |
2407 | /* middle */ | |
2450418c | 2408 | if (m->middle) { |
213c99ee SW |
2409 | ret = read_partial_message_section(con, &m->middle->vec, |
2410 | middle_len, | |
2450418c | 2411 | &con->in_middle_crc); |
31b8006e SW |
2412 | if (ret <= 0) |
2413 | return ret; | |
31b8006e SW |
2414 | } |
2415 | ||
2416 | /* (page) data */ | |
34d2d200 AE |
2417 | if (data_len) { |
2418 | ret = read_partial_msg_data(con); | |
2419 | if (ret <= 0) | |
2420 | return ret; | |
31b8006e SW |
2421 | } |
2422 | ||
31b8006e | 2423 | /* footer */ |
fd51653f AE |
2424 | size = sizeof (m->footer); |
2425 | end += size; | |
2426 | ret = read_partial(con, end, size, &m->footer); | |
57dac9d1 AE |
2427 | if (ret <= 0) |
2428 | return ret; | |
2429 | ||
31b8006e SW |
2430 | dout("read_partial_message got msg %p %d (%u) + %d (%u) + %d (%u)\n", |
2431 | m, front_len, m->footer.front_crc, middle_len, | |
2432 | m->footer.middle_crc, data_len, m->footer.data_crc); | |
2433 | ||
2434 | /* crc ok? */ | |
2435 | if (con->in_front_crc != le32_to_cpu(m->footer.front_crc)) { | |
2436 | pr_err("read_partial_message %p front crc %u != exp. %u\n", | |
2437 | m, con->in_front_crc, m->footer.front_crc); | |
2438 | return -EBADMSG; | |
2439 | } | |
2440 | if (con->in_middle_crc != le32_to_cpu(m->footer.middle_crc)) { | |
2441 | pr_err("read_partial_message %p middle crc %u != exp %u\n", | |
2442 | m, con->in_middle_crc, m->footer.middle_crc); | |
2443 | return -EBADMSG; | |
2444 | } | |
bca064d2 | 2445 | if (do_datacrc && |
31b8006e SW |
2446 | (m->footer.flags & CEPH_MSG_FOOTER_NOCRC) == 0 && |
2447 | con->in_data_crc != le32_to_cpu(m->footer.data_crc)) { | |
2448 | pr_err("read_partial_message %p data crc %u != exp. %u\n", m, | |
2449 | con->in_data_crc, le32_to_cpu(m->footer.data_crc)); | |
2450 | return -EBADMSG; | |
2451 | } | |
2452 | ||
2453 | return 1; /* done! */ | |
2454 | } | |
2455 | ||
2456 | /* | |
2457 | * Process message. This happens in the worker thread. The callback should | |
2458 | * be careful not to do anything that waits on other incoming messages or it | |
2459 | * may deadlock. | |
2460 | */ | |
2461 | static void process_message(struct ceph_connection *con) | |
2462 | { | |
5e095e8b | 2463 | struct ceph_msg *msg; |
31b8006e | 2464 | |
38941f80 AE |
2465 | BUG_ON(con->in_msg->con != con); |
2466 | con->in_msg->con = NULL; | |
5e095e8b | 2467 | msg = con->in_msg; |
31b8006e | 2468 | con->in_msg = NULL; |
36eb71aa | 2469 | con->ops->put(con); |
31b8006e SW |
2470 | |
2471 | /* if first message, set peer_name */ | |
2472 | if (con->peer_name.type == 0) | |
dbad185d | 2473 | con->peer_name = msg->hdr.src; |
31b8006e | 2474 | |
31b8006e | 2475 | con->in_seq++; |
ec302645 | 2476 | mutex_unlock(&con->mutex); |
31b8006e SW |
2477 | |
2478 | dout("===== %p %llu from %s%lld %d=%s len %d+%d (%u %u %u) =====\n", | |
2479 | msg, le64_to_cpu(msg->hdr.seq), | |
dbad185d | 2480 | ENTITY_NAME(msg->hdr.src), |
31b8006e SW |
2481 | le16_to_cpu(msg->hdr.type), |
2482 | ceph_msg_type_name(le16_to_cpu(msg->hdr.type)), | |
2483 | le32_to_cpu(msg->hdr.front_len), | |
2484 | le32_to_cpu(msg->hdr.data_len), | |
2485 | con->in_front_crc, con->in_middle_crc, con->in_data_crc); | |
2486 | con->ops->dispatch(con, msg); | |
ec302645 SW |
2487 | |
2488 | mutex_lock(&con->mutex); | |
31b8006e SW |
2489 | } |
2490 | ||
2491 | ||
2492 | /* | |
2493 | * Write something to the socket. Called in a worker thread when the | |
2494 | * socket appears to be writeable and we have something ready to send. | |
2495 | */ | |
2496 | static int try_write(struct ceph_connection *con) | |
2497 | { | |
31b8006e SW |
2498 | int ret = 1; |
2499 | ||
d59315ca | 2500 | dout("try_write start %p state %lu\n", con, con->state); |
31b8006e | 2501 | |
31b8006e SW |
2502 | more: |
2503 | dout("try_write out_kvec_bytes %d\n", con->out_kvec_bytes); | |
2504 | ||
2505 | /* open the socket first? */ | |
8dacc7da SW |
2506 | if (con->state == CON_STATE_PREOPEN) { |
2507 | BUG_ON(con->sock); | |
2508 | con->state = CON_STATE_CONNECTING; | |
a5988c49 | 2509 | |
e2200423 | 2510 | con_out_kvec_reset(con); |
e825a66d | 2511 | prepare_write_banner(con); |
eed0ef2c | 2512 | prepare_read_banner(con); |
31b8006e | 2513 | |
cf3e5c40 | 2514 | BUG_ON(con->in_msg); |
31b8006e SW |
2515 | con->in_tag = CEPH_MSGR_TAG_READY; |
2516 | dout("try_write initiating connect on %p new state %lu\n", | |
2517 | con, con->state); | |
41617d0c AE |
2518 | ret = ceph_tcp_connect(con); |
2519 | if (ret < 0) { | |
31b8006e | 2520 | con->error_msg = "connect error"; |
31b8006e SW |
2521 | goto out; |
2522 | } | |
2523 | } | |
2524 | ||
2525 | more_kvec: | |
2526 | /* kvec data queued? */ | |
2527 | if (con->out_skip) { | |
2528 | ret = write_partial_skip(con); | |
2529 | if (ret <= 0) | |
42961d23 | 2530 | goto out; |
31b8006e SW |
2531 | } |
2532 | if (con->out_kvec_left) { | |
2533 | ret = write_partial_kvec(con); | |
2534 | if (ret <= 0) | |
42961d23 | 2535 | goto out; |
31b8006e SW |
2536 | } |
2537 | ||
2538 | /* msg pages? */ | |
2539 | if (con->out_msg) { | |
c86a2930 SW |
2540 | if (con->out_msg_done) { |
2541 | ceph_msg_put(con->out_msg); | |
2542 | con->out_msg = NULL; /* we're done with this one */ | |
2543 | goto do_next; | |
2544 | } | |
2545 | ||
34d2d200 | 2546 | ret = write_partial_message_data(con); |
31b8006e SW |
2547 | if (ret == 1) |
2548 | goto more_kvec; /* we need to send the footer, too! */ | |
2549 | if (ret == 0) | |
42961d23 | 2550 | goto out; |
31b8006e | 2551 | if (ret < 0) { |
34d2d200 | 2552 | dout("try_write write_partial_message_data err %d\n", |
31b8006e | 2553 | ret); |
42961d23 | 2554 | goto out; |
31b8006e SW |
2555 | } |
2556 | } | |
2557 | ||
c86a2930 | 2558 | do_next: |
8dacc7da | 2559 | if (con->state == CON_STATE_OPEN) { |
31b8006e SW |
2560 | /* is anything else pending? */ |
2561 | if (!list_empty(&con->out_queue)) { | |
2562 | prepare_write_message(con); | |
2563 | goto more; | |
2564 | } | |
2565 | if (con->in_seq > con->in_seq_acked) { | |
2566 | prepare_write_ack(con); | |
2567 | goto more; | |
2568 | } | |
c9ffc77a | 2569 | if (con_flag_test_and_clear(con, CON_FLAG_KEEPALIVE_PENDING)) { |
31b8006e SW |
2570 | prepare_write_keepalive(con); |
2571 | goto more; | |
2572 | } | |
2573 | } | |
2574 | ||
2575 | /* Nothing to do! */ | |
c9ffc77a | 2576 | con_flag_clear(con, CON_FLAG_WRITE_PENDING); |
31b8006e | 2577 | dout("try_write nothing else to write.\n"); |
31b8006e SW |
2578 | ret = 0; |
2579 | out: | |
42961d23 | 2580 | dout("try_write done on %p ret %d\n", con, ret); |
31b8006e SW |
2581 | return ret; |
2582 | } | |
2583 | ||
2584 | ||
2585 | ||
2586 | /* | |
2587 | * Read what we can from the socket. | |
2588 | */ | |
2589 | static int try_read(struct ceph_connection *con) | |
2590 | { | |
31b8006e SW |
2591 | int ret = -1; |
2592 | ||
8dacc7da SW |
2593 | more: |
2594 | dout("try_read start on %p state %lu\n", con, con->state); | |
2595 | if (con->state != CON_STATE_CONNECTING && | |
2596 | con->state != CON_STATE_NEGOTIATING && | |
2597 | con->state != CON_STATE_OPEN) | |
31b8006e SW |
2598 | return 0; |
2599 | ||
8dacc7da | 2600 | BUG_ON(!con->sock); |
ec302645 | 2601 | |
31b8006e SW |
2602 | dout("try_read tag %d in_base_pos %d\n", (int)con->in_tag, |
2603 | con->in_base_pos); | |
0da5d703 | 2604 | |
8dacc7da | 2605 | if (con->state == CON_STATE_CONNECTING) { |
7593af92 AE |
2606 | dout("try_read connecting\n"); |
2607 | ret = read_partial_banner(con); | |
2608 | if (ret <= 0) | |
ab166d5a | 2609 | goto out; |
7593af92 AE |
2610 | ret = process_banner(con); |
2611 | if (ret < 0) | |
2612 | goto out; | |
2613 | ||
8dacc7da | 2614 | con->state = CON_STATE_NEGOTIATING; |
7593af92 | 2615 | |
6d4221b5 JS |
2616 | /* |
2617 | * Received banner is good, exchange connection info. | |
2618 | * Do not reset out_kvec, as sending our banner raced | |
2619 | * with receiving peer banner after connect completed. | |
2620 | */ | |
7593af92 AE |
2621 | ret = prepare_write_connect(con); |
2622 | if (ret < 0) | |
2623 | goto out; | |
2624 | prepare_read_connect(con); | |
2625 | ||
2626 | /* Send connection info before awaiting response */ | |
0da5d703 SW |
2627 | goto out; |
2628 | } | |
2629 | ||
8dacc7da | 2630 | if (con->state == CON_STATE_NEGOTIATING) { |
7593af92 | 2631 | dout("try_read negotiating\n"); |
31b8006e SW |
2632 | ret = read_partial_connect(con); |
2633 | if (ret <= 0) | |
31b8006e | 2634 | goto out; |
98bdb0aa SW |
2635 | ret = process_connect(con); |
2636 | if (ret < 0) | |
2637 | goto out; | |
31b8006e SW |
2638 | goto more; |
2639 | } | |
2640 | ||
122070a2 | 2641 | WARN_ON(con->state != CON_STATE_OPEN); |
8dacc7da | 2642 | |
31b8006e SW |
2643 | if (con->in_base_pos < 0) { |
2644 | /* | |
2645 | * skipping + discarding content. | |
2646 | * | |
2647 | * FIXME: there must be a better way to do this! | |
2648 | */ | |
84495f49 AE |
2649 | static char buf[SKIP_BUF_SIZE]; |
2650 | int skip = min((int) sizeof (buf), -con->in_base_pos); | |
2651 | ||
31b8006e SW |
2652 | dout("skipping %d / %d bytes\n", skip, -con->in_base_pos); |
2653 | ret = ceph_tcp_recvmsg(con->sock, buf, skip); | |
2654 | if (ret <= 0) | |
98bdb0aa | 2655 | goto out; |
31b8006e SW |
2656 | con->in_base_pos += ret; |
2657 | if (con->in_base_pos) | |
2658 | goto more; | |
2659 | } | |
2660 | if (con->in_tag == CEPH_MSGR_TAG_READY) { | |
2661 | /* | |
2662 | * what's next? | |
2663 | */ | |
2664 | ret = ceph_tcp_recvmsg(con->sock, &con->in_tag, 1); | |
2665 | if (ret <= 0) | |
98bdb0aa | 2666 | goto out; |
31b8006e SW |
2667 | dout("try_read got tag %d\n", (int)con->in_tag); |
2668 | switch (con->in_tag) { | |
2669 | case CEPH_MSGR_TAG_MSG: | |
2670 | prepare_read_message(con); | |
2671 | break; | |
2672 | case CEPH_MSGR_TAG_ACK: | |
2673 | prepare_read_ack(con); | |
2674 | break; | |
2675 | case CEPH_MSGR_TAG_CLOSE: | |
8dacc7da SW |
2676 | con_close_socket(con); |
2677 | con->state = CON_STATE_CLOSED; | |
98bdb0aa | 2678 | goto out; |
31b8006e SW |
2679 | default: |
2680 | goto bad_tag; | |
2681 | } | |
2682 | } | |
2683 | if (con->in_tag == CEPH_MSGR_TAG_MSG) { | |
2684 | ret = read_partial_message(con); | |
2685 | if (ret <= 0) { | |
2686 | switch (ret) { | |
2687 | case -EBADMSG: | |
2688 | con->error_msg = "bad crc"; | |
2689 | ret = -EIO; | |
98bdb0aa | 2690 | break; |
31b8006e SW |
2691 | case -EIO: |
2692 | con->error_msg = "io error"; | |
98bdb0aa | 2693 | break; |
31b8006e | 2694 | } |
98bdb0aa | 2695 | goto out; |
31b8006e SW |
2696 | } |
2697 | if (con->in_tag == CEPH_MSGR_TAG_READY) | |
2698 | goto more; | |
2699 | process_message(con); | |
7b862e07 SW |
2700 | if (con->state == CON_STATE_OPEN) |
2701 | prepare_read_tag(con); | |
31b8006e SW |
2702 | goto more; |
2703 | } | |
3a23083b SW |
2704 | if (con->in_tag == CEPH_MSGR_TAG_ACK || |
2705 | con->in_tag == CEPH_MSGR_TAG_SEQ) { | |
2706 | /* | |
2707 | * the final handshake seq exchange is semantically | |
2708 | * equivalent to an ACK | |
2709 | */ | |
31b8006e SW |
2710 | ret = read_partial_ack(con); |
2711 | if (ret <= 0) | |
98bdb0aa | 2712 | goto out; |
31b8006e SW |
2713 | process_ack(con); |
2714 | goto more; | |
2715 | } | |
2716 | ||
31b8006e | 2717 | out: |
98bdb0aa | 2718 | dout("try_read done on %p ret %d\n", con, ret); |
31b8006e SW |
2719 | return ret; |
2720 | ||
2721 | bad_tag: | |
2722 | pr_err("try_read bad con->in_tag = %d\n", (int)con->in_tag); | |
2723 | con->error_msg = "protocol error, garbage tag"; | |
2724 | ret = -1; | |
2725 | goto out; | |
2726 | } | |
2727 | ||
2728 | ||
2729 | /* | |
802c6d96 AE |
2730 | * Atomically queue work on a connection after the specified delay. |
2731 | * Bump @con reference to avoid races with connection teardown. | |
2732 | * Returns 0 if work was queued, or an error code otherwise. | |
31b8006e | 2733 | */ |
802c6d96 | 2734 | static int queue_con_delay(struct ceph_connection *con, unsigned long delay) |
31b8006e | 2735 | { |
31b8006e | 2736 | if (!con->ops->get(con)) { |
802c6d96 AE |
2737 | dout("%s %p ref count 0\n", __func__, con); |
2738 | ||
2739 | return -ENOENT; | |
31b8006e SW |
2740 | } |
2741 | ||
802c6d96 AE |
2742 | if (!queue_delayed_work(ceph_msgr_wq, &con->work, delay)) { |
2743 | dout("%s %p - already queued\n", __func__, con); | |
31b8006e | 2744 | con->ops->put(con); |
802c6d96 AE |
2745 | |
2746 | return -EBUSY; | |
31b8006e | 2747 | } |
802c6d96 AE |
2748 | |
2749 | dout("%s %p %lu\n", __func__, con, delay); | |
2750 | ||
2751 | return 0; | |
2752 | } | |
2753 | ||
2754 | static void queue_con(struct ceph_connection *con) | |
2755 | { | |
2756 | (void) queue_con_delay(con, 0); | |
31b8006e SW |
2757 | } |
2758 | ||
7bb21d68 AE |
2759 | static bool con_sock_closed(struct ceph_connection *con) |
2760 | { | |
c9ffc77a | 2761 | if (!con_flag_test_and_clear(con, CON_FLAG_SOCK_CLOSED)) |
7bb21d68 AE |
2762 | return false; |
2763 | ||
2764 | #define CASE(x) \ | |
2765 | case CON_STATE_ ## x: \ | |
2766 | con->error_msg = "socket closed (con state " #x ")"; \ | |
2767 | break; | |
2768 | ||
2769 | switch (con->state) { | |
2770 | CASE(CLOSED); | |
2771 | CASE(PREOPEN); | |
2772 | CASE(CONNECTING); | |
2773 | CASE(NEGOTIATING); | |
2774 | CASE(OPEN); | |
2775 | CASE(STANDBY); | |
2776 | default: | |
2777 | pr_warning("%s con %p unrecognized state %lu\n", | |
2778 | __func__, con, con->state); | |
2779 | con->error_msg = "unrecognized con state"; | |
2780 | BUG(); | |
2781 | break; | |
2782 | } | |
2783 | #undef CASE | |
2784 | ||
2785 | return true; | |
2786 | } | |
2787 | ||
f20a39fd AE |
2788 | static bool con_backoff(struct ceph_connection *con) |
2789 | { | |
2790 | int ret; | |
2791 | ||
2792 | if (!con_flag_test_and_clear(con, CON_FLAG_BACKOFF)) | |
2793 | return false; | |
2794 | ||
2795 | ret = queue_con_delay(con, round_jiffies_relative(con->delay)); | |
2796 | if (ret) { | |
2797 | dout("%s: con %p FAILED to back off %lu\n", __func__, | |
2798 | con, con->delay); | |
2799 | BUG_ON(ret == -ENOENT); | |
2800 | con_flag_set(con, CON_FLAG_BACKOFF); | |
2801 | } | |
2802 | ||
2803 | return true; | |
2804 | } | |
2805 | ||
93209264 AE |
2806 | /* Finish fault handling; con->mutex must *not* be held here */ |
2807 | ||
2808 | static void con_fault_finish(struct ceph_connection *con) | |
2809 | { | |
2810 | /* | |
2811 | * in case we faulted due to authentication, invalidate our | |
2812 | * current tickets so that we can get new ones. | |
2813 | */ | |
2814 | if (con->auth_retry && con->ops->invalidate_authorizer) { | |
2815 | dout("calling invalidate_authorizer()\n"); | |
2816 | con->ops->invalidate_authorizer(con); | |
2817 | } | |
2818 | ||
2819 | if (con->ops->fault) | |
2820 | con->ops->fault(con); | |
2821 | } | |
2822 | ||
31b8006e SW |
2823 | /* |
2824 | * Do some work on a connection. Drop a connection ref when we're done. | |
2825 | */ | |
2826 | static void con_work(struct work_struct *work) | |
2827 | { | |
2828 | struct ceph_connection *con = container_of(work, struct ceph_connection, | |
2829 | work.work); | |
49659416 | 2830 | bool fault; |
31b8006e | 2831 | |
9dd4658d | 2832 | mutex_lock(&con->mutex); |
49659416 AE |
2833 | while (true) { |
2834 | int ret; | |
31b8006e | 2835 | |
49659416 AE |
2836 | if ((fault = con_sock_closed(con))) { |
2837 | dout("%s: con %p SOCK_CLOSED\n", __func__, con); | |
2838 | break; | |
2839 | } | |
2840 | if (con_backoff(con)) { | |
2841 | dout("%s: con %p BACKOFF\n", __func__, con); | |
2842 | break; | |
2843 | } | |
2844 | if (con->state == CON_STATE_STANDBY) { | |
2845 | dout("%s: con %p STANDBY\n", __func__, con); | |
2846 | break; | |
2847 | } | |
2848 | if (con->state == CON_STATE_CLOSED) { | |
2849 | dout("%s: con %p CLOSED\n", __func__, con); | |
2850 | BUG_ON(con->sock); | |
2851 | break; | |
2852 | } | |
2853 | if (con->state == CON_STATE_PREOPEN) { | |
2854 | dout("%s: con %p PREOPEN\n", __func__, con); | |
2855 | BUG_ON(con->sock); | |
2856 | } | |
0da5d703 | 2857 | |
49659416 AE |
2858 | ret = try_read(con); |
2859 | if (ret < 0) { | |
2860 | if (ret == -EAGAIN) | |
2861 | continue; | |
2862 | con->error_msg = "socket error on read"; | |
2863 | fault = true; | |
2864 | break; | |
2865 | } | |
2866 | ||
2867 | ret = try_write(con); | |
2868 | if (ret < 0) { | |
2869 | if (ret == -EAGAIN) | |
2870 | continue; | |
2871 | con->error_msg = "socket error on write"; | |
2872 | fault = true; | |
2873 | } | |
2874 | ||
2875 | break; /* If we make it to here, we're done */ | |
3a140a0d | 2876 | } |
b6e7b6a1 AE |
2877 | if (fault) |
2878 | con_fault(con); | |
9dd4658d | 2879 | mutex_unlock(&con->mutex); |
0da5d703 | 2880 | |
b6e7b6a1 AE |
2881 | if (fault) |
2882 | con_fault_finish(con); | |
2883 | ||
2884 | con->ops->put(con); | |
31b8006e SW |
2885 | } |
2886 | ||
31b8006e SW |
2887 | /* |
2888 | * Generic error/fault handler. A retry mechanism is used with | |
2889 | * exponential backoff | |
2890 | */ | |
93209264 | 2891 | static void con_fault(struct ceph_connection *con) |
31b8006e | 2892 | { |
28362986 | 2893 | pr_warning("%s%lld %s %s\n", ENTITY_NAME(con->peer_name), |
3d14c5d2 | 2894 | ceph_pr_addr(&con->peer_addr.in_addr), con->error_msg); |
31b8006e | 2895 | dout("fault %p state %lu to peer %s\n", |
3d14c5d2 | 2896 | con, con->state, ceph_pr_addr(&con->peer_addr.in_addr)); |
31b8006e | 2897 | |
122070a2 | 2898 | WARN_ON(con->state != CON_STATE_CONNECTING && |
8dacc7da SW |
2899 | con->state != CON_STATE_NEGOTIATING && |
2900 | con->state != CON_STATE_OPEN); | |
ec302645 | 2901 | |
31b8006e | 2902 | con_close_socket(con); |
5e095e8b | 2903 | |
c9ffc77a | 2904 | if (con_flag_test(con, CON_FLAG_LOSSYTX)) { |
8dacc7da SW |
2905 | dout("fault on LOSSYTX channel, marking CLOSED\n"); |
2906 | con->state = CON_STATE_CLOSED; | |
93209264 | 2907 | return; |
3b5ede07 SW |
2908 | } |
2909 | ||
5e095e8b | 2910 | if (con->in_msg) { |
38941f80 AE |
2911 | BUG_ON(con->in_msg->con != con); |
2912 | con->in_msg->con = NULL; | |
5e095e8b SW |
2913 | ceph_msg_put(con->in_msg); |
2914 | con->in_msg = NULL; | |
36eb71aa | 2915 | con->ops->put(con); |
5e095e8b | 2916 | } |
31b8006e | 2917 | |
e80a52d1 SW |
2918 | /* Requeue anything that hasn't been acked */ |
2919 | list_splice_init(&con->out_sent, &con->out_queue); | |
9bd2e6f8 | 2920 | |
e76661d0 SW |
2921 | /* If there are no messages queued or keepalive pending, place |
2922 | * the connection in a STANDBY state */ | |
2923 | if (list_empty(&con->out_queue) && | |
c9ffc77a | 2924 | !con_flag_test(con, CON_FLAG_KEEPALIVE_PENDING)) { |
e00de341 | 2925 | dout("fault %p setting STANDBY clearing WRITE_PENDING\n", con); |
c9ffc77a | 2926 | con_flag_clear(con, CON_FLAG_WRITE_PENDING); |
8dacc7da | 2927 | con->state = CON_STATE_STANDBY; |
e80a52d1 SW |
2928 | } else { |
2929 | /* retry after a delay. */ | |
8dacc7da | 2930 | con->state = CON_STATE_PREOPEN; |
e80a52d1 SW |
2931 | if (con->delay == 0) |
2932 | con->delay = BASE_DELAY_INTERVAL; | |
2933 | else if (con->delay < MAX_DELAY_INTERVAL) | |
2934 | con->delay *= 2; | |
c9ffc77a | 2935 | con_flag_set(con, CON_FLAG_BACKOFF); |
8618e30b | 2936 | queue_con(con); |
31b8006e | 2937 | } |
31b8006e SW |
2938 | } |
2939 | ||
2940 | ||
2941 | ||
2942 | /* | |
15d9882c | 2943 | * initialize a new messenger instance |
31b8006e | 2944 | */ |
15d9882c AE |
2945 | void ceph_messenger_init(struct ceph_messenger *msgr, |
2946 | struct ceph_entity_addr *myaddr, | |
2947 | u32 supported_features, | |
2948 | u32 required_features, | |
2949 | bool nocrc) | |
31b8006e | 2950 | { |
3d14c5d2 YS |
2951 | msgr->supported_features = supported_features; |
2952 | msgr->required_features = required_features; | |
2953 | ||
31b8006e SW |
2954 | spin_lock_init(&msgr->global_seq_lock); |
2955 | ||
31b8006e SW |
2956 | if (myaddr) |
2957 | msgr->inst.addr = *myaddr; | |
2958 | ||
2959 | /* select a random nonce */ | |
ac8839d7 | 2960 | msgr->inst.addr.type = 0; |
103e2d3a | 2961 | get_random_bytes(&msgr->inst.addr.nonce, sizeof(msgr->inst.addr.nonce)); |
63f2d211 | 2962 | encode_my_addr(msgr); |
15d9882c | 2963 | msgr->nocrc = nocrc; |
31b8006e | 2964 | |
a2a32584 | 2965 | atomic_set(&msgr->stopping, 0); |
31b8006e | 2966 | |
15d9882c | 2967 | dout("%s %p\n", __func__, msgr); |
31b8006e | 2968 | } |
15d9882c | 2969 | EXPORT_SYMBOL(ceph_messenger_init); |
31b8006e | 2970 | |
e00de341 SW |
2971 | static void clear_standby(struct ceph_connection *con) |
2972 | { | |
2973 | /* come back from STANDBY? */ | |
8dacc7da | 2974 | if (con->state == CON_STATE_STANDBY) { |
e00de341 | 2975 | dout("clear_standby %p and ++connect_seq\n", con); |
8dacc7da | 2976 | con->state = CON_STATE_PREOPEN; |
e00de341 | 2977 | con->connect_seq++; |
c9ffc77a AE |
2978 | WARN_ON(con_flag_test(con, CON_FLAG_WRITE_PENDING)); |
2979 | WARN_ON(con_flag_test(con, CON_FLAG_KEEPALIVE_PENDING)); | |
e00de341 SW |
2980 | } |
2981 | } | |
2982 | ||
31b8006e SW |
2983 | /* |
2984 | * Queue up an outgoing message on the given connection. | |
2985 | */ | |
2986 | void ceph_con_send(struct ceph_connection *con, struct ceph_msg *msg) | |
2987 | { | |
31b8006e | 2988 | /* set src+dst */ |
dbad185d | 2989 | msg->hdr.src = con->msgr->inst.name; |
3ca02ef9 | 2990 | BUG_ON(msg->front.iov_len != le32_to_cpu(msg->hdr.front_len)); |
e84346b7 SW |
2991 | msg->needs_out_seq = true; |
2992 | ||
ec302645 | 2993 | mutex_lock(&con->mutex); |
92ce034b | 2994 | |
8dacc7da | 2995 | if (con->state == CON_STATE_CLOSED) { |
a59b55a6 SW |
2996 | dout("con_send %p closed, dropping %p\n", con, msg); |
2997 | ceph_msg_put(msg); | |
2998 | mutex_unlock(&con->mutex); | |
2999 | return; | |
3000 | } | |
3001 | ||
38941f80 | 3002 | BUG_ON(msg->con != NULL); |
36eb71aa | 3003 | msg->con = con->ops->get(con); |
92ce034b AE |
3004 | BUG_ON(msg->con == NULL); |
3005 | ||
31b8006e SW |
3006 | BUG_ON(!list_empty(&msg->list_head)); |
3007 | list_add_tail(&msg->list_head, &con->out_queue); | |
3008 | dout("----- %p to %s%lld %d=%s len %d+%d+%d -----\n", msg, | |
3009 | ENTITY_NAME(con->peer_name), le16_to_cpu(msg->hdr.type), | |
3010 | ceph_msg_type_name(le16_to_cpu(msg->hdr.type)), | |
3011 | le32_to_cpu(msg->hdr.front_len), | |
3012 | le32_to_cpu(msg->hdr.middle_len), | |
3013 | le32_to_cpu(msg->hdr.data_len)); | |
00650931 SW |
3014 | |
3015 | clear_standby(con); | |
ec302645 | 3016 | mutex_unlock(&con->mutex); |
31b8006e SW |
3017 | |
3018 | /* if there wasn't anything waiting to send before, queue | |
3019 | * new work */ | |
c9ffc77a | 3020 | if (con_flag_test_and_set(con, CON_FLAG_WRITE_PENDING) == 0) |
31b8006e SW |
3021 | queue_con(con); |
3022 | } | |
3d14c5d2 | 3023 | EXPORT_SYMBOL(ceph_con_send); |
31b8006e SW |
3024 | |
3025 | /* | |
3026 | * Revoke a message that was previously queued for send | |
3027 | */ | |
6740a845 | 3028 | void ceph_msg_revoke(struct ceph_msg *msg) |
31b8006e | 3029 | { |
6740a845 AE |
3030 | struct ceph_connection *con = msg->con; |
3031 | ||
3032 | if (!con) | |
3033 | return; /* Message not in our possession */ | |
3034 | ||
ec302645 | 3035 | mutex_lock(&con->mutex); |
31b8006e | 3036 | if (!list_empty(&msg->list_head)) { |
38941f80 | 3037 | dout("%s %p msg %p - was on queue\n", __func__, con, msg); |
31b8006e | 3038 | list_del_init(&msg->list_head); |
38941f80 | 3039 | BUG_ON(msg->con == NULL); |
36eb71aa | 3040 | msg->con->ops->put(msg->con); |
38941f80 | 3041 | msg->con = NULL; |
31b8006e | 3042 | msg->hdr.seq = 0; |
38941f80 | 3043 | |
31b8006e | 3044 | ceph_msg_put(msg); |
ed98adad SW |
3045 | } |
3046 | if (con->out_msg == msg) { | |
38941f80 | 3047 | dout("%s %p msg %p - was sending\n", __func__, con, msg); |
ed98adad | 3048 | con->out_msg = NULL; |
31b8006e SW |
3049 | if (con->out_kvec_is_msg) { |
3050 | con->out_skip = con->out_kvec_bytes; | |
3051 | con->out_kvec_is_msg = false; | |
3052 | } | |
ed98adad | 3053 | msg->hdr.seq = 0; |
92ce034b AE |
3054 | |
3055 | ceph_msg_put(msg); | |
31b8006e | 3056 | } |
ec302645 | 3057 | mutex_unlock(&con->mutex); |
31b8006e SW |
3058 | } |
3059 | ||
350b1c32 | 3060 | /* |
0d59ab81 | 3061 | * Revoke a message that we may be reading data into |
350b1c32 | 3062 | */ |
8921d114 | 3063 | void ceph_msg_revoke_incoming(struct ceph_msg *msg) |
350b1c32 | 3064 | { |
8921d114 AE |
3065 | struct ceph_connection *con; |
3066 | ||
3067 | BUG_ON(msg == NULL); | |
3068 | if (!msg->con) { | |
3069 | dout("%s msg %p null con\n", __func__, msg); | |
3070 | ||
3071 | return; /* Message not in our possession */ | |
3072 | } | |
3073 | ||
3074 | con = msg->con; | |
350b1c32 | 3075 | mutex_lock(&con->mutex); |
8921d114 | 3076 | if (con->in_msg == msg) { |
95c96174 ED |
3077 | unsigned int front_len = le32_to_cpu(con->in_hdr.front_len); |
3078 | unsigned int middle_len = le32_to_cpu(con->in_hdr.middle_len); | |
3079 | unsigned int data_len = le32_to_cpu(con->in_hdr.data_len); | |
350b1c32 SW |
3080 | |
3081 | /* skip rest of message */ | |
8921d114 AE |
3082 | dout("%s %p msg %p revoked\n", __func__, con, msg); |
3083 | con->in_base_pos = con->in_base_pos - | |
350b1c32 | 3084 | sizeof(struct ceph_msg_header) - |
0d59ab81 YS |
3085 | front_len - |
3086 | middle_len - | |
3087 | data_len - | |
350b1c32 | 3088 | sizeof(struct ceph_msg_footer); |
350b1c32 SW |
3089 | ceph_msg_put(con->in_msg); |
3090 | con->in_msg = NULL; | |
3091 | con->in_tag = CEPH_MSGR_TAG_READY; | |
684be25c | 3092 | con->in_seq++; |
350b1c32 | 3093 | } else { |
8921d114 AE |
3094 | dout("%s %p in_msg %p msg %p no-op\n", |
3095 | __func__, con, con->in_msg, msg); | |
350b1c32 SW |
3096 | } |
3097 | mutex_unlock(&con->mutex); | |
3098 | } | |
3099 | ||
31b8006e SW |
3100 | /* |
3101 | * Queue a keepalive byte to ensure the tcp connection is alive. | |
3102 | */ | |
3103 | void ceph_con_keepalive(struct ceph_connection *con) | |
3104 | { | |
e00de341 | 3105 | dout("con_keepalive %p\n", con); |
00650931 | 3106 | mutex_lock(&con->mutex); |
e00de341 | 3107 | clear_standby(con); |
00650931 | 3108 | mutex_unlock(&con->mutex); |
c9ffc77a AE |
3109 | if (con_flag_test_and_set(con, CON_FLAG_KEEPALIVE_PENDING) == 0 && |
3110 | con_flag_test_and_set(con, CON_FLAG_WRITE_PENDING) == 0) | |
31b8006e SW |
3111 | queue_con(con); |
3112 | } | |
3d14c5d2 | 3113 | EXPORT_SYMBOL(ceph_con_keepalive); |
31b8006e | 3114 | |
43794509 AE |
3115 | static void ceph_msg_data_init(struct ceph_msg_data *data) |
3116 | { | |
3117 | data->type = CEPH_MSG_DATA_NONE; | |
3118 | } | |
3119 | ||
02afca6c | 3120 | void ceph_msg_data_set_pages(struct ceph_msg *msg, struct page **pages, |
f1baeb2b | 3121 | size_t length, size_t alignment) |
02afca6c | 3122 | { |
07aa1558 AE |
3123 | BUG_ON(!pages); |
3124 | BUG_ON(!length); | |
43794509 | 3125 | BUG_ON(msg->p.type != CEPH_MSG_DATA_NONE); |
02afca6c | 3126 | |
43794509 | 3127 | msg->p.type = CEPH_MSG_DATA_PAGES; |
f9e15777 AE |
3128 | msg->p.pages = pages; |
3129 | msg->p.length = length; | |
3130 | msg->p.alignment = alignment & ~PAGE_MASK; | |
02afca6c AE |
3131 | } |
3132 | EXPORT_SYMBOL(ceph_msg_data_set_pages); | |
31b8006e | 3133 | |
27fa8385 AE |
3134 | void ceph_msg_data_set_pagelist(struct ceph_msg *msg, |
3135 | struct ceph_pagelist *pagelist) | |
3136 | { | |
07aa1558 AE |
3137 | BUG_ON(!pagelist); |
3138 | BUG_ON(!pagelist->length); | |
43794509 | 3139 | BUG_ON(msg->l.type != CEPH_MSG_DATA_NONE); |
27fa8385 | 3140 | |
43794509 | 3141 | msg->l.type = CEPH_MSG_DATA_PAGELIST; |
f9e15777 | 3142 | msg->l.pagelist = pagelist; |
27fa8385 AE |
3143 | } |
3144 | EXPORT_SYMBOL(ceph_msg_data_set_pagelist); | |
3145 | ||
3146 | void ceph_msg_data_set_bio(struct ceph_msg *msg, struct bio *bio) | |
3147 | { | |
07aa1558 | 3148 | BUG_ON(!bio); |
43794509 | 3149 | BUG_ON(msg->b.type != CEPH_MSG_DATA_NONE); |
27fa8385 | 3150 | |
43794509 | 3151 | msg->b.type = CEPH_MSG_DATA_BIO; |
f9e15777 | 3152 | msg->b.bio = bio; |
27fa8385 AE |
3153 | } |
3154 | EXPORT_SYMBOL(ceph_msg_data_set_bio); | |
3155 | ||
31b8006e SW |
3156 | /* |
3157 | * construct a new message with given type, size | |
3158 | * the new msg has a ref count of 1. | |
3159 | */ | |
b61c2763 SW |
3160 | struct ceph_msg *ceph_msg_new(int type, int front_len, gfp_t flags, |
3161 | bool can_fail) | |
31b8006e SW |
3162 | { |
3163 | struct ceph_msg *m; | |
3164 | ||
9516e45b | 3165 | m = kzalloc(sizeof(*m), flags); |
31b8006e SW |
3166 | if (m == NULL) |
3167 | goto out; | |
31b8006e SW |
3168 | |
3169 | m->hdr.type = cpu_to_le16(type); | |
45c6ceb5 | 3170 | m->hdr.priority = cpu_to_le16(CEPH_MSG_PRIO_DEFAULT); |
31b8006e | 3171 | m->hdr.front_len = cpu_to_le32(front_len); |
ca20892d | 3172 | |
9516e45b AE |
3173 | INIT_LIST_HEAD(&m->list_head); |
3174 | kref_init(&m->kref); | |
ca20892d | 3175 | |
43794509 AE |
3176 | ceph_msg_data_init(&m->p); |
3177 | ceph_msg_data_init(&m->l); | |
3178 | ceph_msg_data_init(&m->b); | |
43794509 | 3179 | |
31b8006e | 3180 | /* front */ |
9516e45b | 3181 | m->front_max = front_len; |
31b8006e SW |
3182 | if (front_len) { |
3183 | if (front_len > PAGE_CACHE_SIZE) { | |
34d23762 | 3184 | m->front.iov_base = __vmalloc(front_len, flags, |
31b8006e SW |
3185 | PAGE_KERNEL); |
3186 | m->front_is_vmalloc = true; | |
3187 | } else { | |
34d23762 | 3188 | m->front.iov_base = kmalloc(front_len, flags); |
31b8006e SW |
3189 | } |
3190 | if (m->front.iov_base == NULL) { | |
b61c2763 | 3191 | dout("ceph_msg_new can't allocate %d bytes\n", |
31b8006e SW |
3192 | front_len); |
3193 | goto out2; | |
3194 | } | |
3195 | } else { | |
3196 | m->front.iov_base = NULL; | |
3197 | } | |
3198 | m->front.iov_len = front_len; | |
3199 | ||
bb257664 | 3200 | dout("ceph_msg_new %p front %d\n", m, front_len); |
31b8006e SW |
3201 | return m; |
3202 | ||
3203 | out2: | |
3204 | ceph_msg_put(m); | |
3205 | out: | |
b61c2763 SW |
3206 | if (!can_fail) { |
3207 | pr_err("msg_new can't create type %d front %d\n", type, | |
3208 | front_len); | |
f0ed1b7c | 3209 | WARN_ON(1); |
b61c2763 SW |
3210 | } else { |
3211 | dout("msg_new can't create type %d front %d\n", type, | |
3212 | front_len); | |
3213 | } | |
a79832f2 | 3214 | return NULL; |
31b8006e | 3215 | } |
3d14c5d2 | 3216 | EXPORT_SYMBOL(ceph_msg_new); |
31b8006e | 3217 | |
31b8006e SW |
3218 | /* |
3219 | * Allocate "middle" portion of a message, if it is needed and wasn't | |
3220 | * allocated by alloc_msg. This allows us to read a small fixed-size | |
3221 | * per-type header in the front and then gracefully fail (i.e., | |
3222 | * propagate the error to the caller based on info in the front) when | |
3223 | * the middle is too large. | |
3224 | */ | |
2450418c | 3225 | static int ceph_alloc_middle(struct ceph_connection *con, struct ceph_msg *msg) |
31b8006e SW |
3226 | { |
3227 | int type = le16_to_cpu(msg->hdr.type); | |
3228 | int middle_len = le32_to_cpu(msg->hdr.middle_len); | |
3229 | ||
3230 | dout("alloc_middle %p type %d %s middle_len %d\n", msg, type, | |
3231 | ceph_msg_type_name(type), middle_len); | |
3232 | BUG_ON(!middle_len); | |
3233 | BUG_ON(msg->middle); | |
3234 | ||
b6c1d5b8 | 3235 | msg->middle = ceph_buffer_new(middle_len, GFP_NOFS); |
31b8006e SW |
3236 | if (!msg->middle) |
3237 | return -ENOMEM; | |
3238 | return 0; | |
3239 | } | |
3240 | ||
2450418c | 3241 | /* |
1c20f2d2 AE |
3242 | * Allocate a message for receiving an incoming message on a |
3243 | * connection, and save the result in con->in_msg. Uses the | |
3244 | * connection's private alloc_msg op if available. | |
3245 | * | |
4740a623 SW |
3246 | * Returns 0 on success, or a negative error code. |
3247 | * | |
3248 | * On success, if we set *skip = 1: | |
3249 | * - the next message should be skipped and ignored. | |
3250 | * - con->in_msg == NULL | |
3251 | * or if we set *skip = 0: | |
3252 | * - con->in_msg is non-null. | |
3253 | * On error (ENOMEM, EAGAIN, ...), | |
3254 | * - con->in_msg == NULL | |
2450418c | 3255 | */ |
4740a623 | 3256 | static int ceph_con_in_msg_alloc(struct ceph_connection *con, int *skip) |
2450418c | 3257 | { |
4740a623 | 3258 | struct ceph_msg_header *hdr = &con->in_hdr; |
2450418c | 3259 | int middle_len = le32_to_cpu(hdr->middle_len); |
1d866d1c | 3260 | struct ceph_msg *msg; |
4740a623 | 3261 | int ret = 0; |
2450418c | 3262 | |
1c20f2d2 | 3263 | BUG_ON(con->in_msg != NULL); |
53ded495 | 3264 | BUG_ON(!con->ops->alloc_msg); |
2450418c | 3265 | |
53ded495 AE |
3266 | mutex_unlock(&con->mutex); |
3267 | msg = con->ops->alloc_msg(con, hdr, skip); | |
3268 | mutex_lock(&con->mutex); | |
3269 | if (con->state != CON_STATE_OPEN) { | |
3270 | if (msg) | |
1d866d1c | 3271 | ceph_msg_put(msg); |
53ded495 AE |
3272 | return -EAGAIN; |
3273 | } | |
4137577a AE |
3274 | if (msg) { |
3275 | BUG_ON(*skip); | |
3276 | con->in_msg = msg; | |
36eb71aa | 3277 | con->in_msg->con = con->ops->get(con); |
92ce034b | 3278 | BUG_ON(con->in_msg->con == NULL); |
4137577a AE |
3279 | } else { |
3280 | /* | |
3281 | * Null message pointer means either we should skip | |
3282 | * this message or we couldn't allocate memory. The | |
3283 | * former is not an error. | |
3284 | */ | |
3285 | if (*skip) | |
3286 | return 0; | |
3287 | con->error_msg = "error allocating memory for incoming message"; | |
3288 | ||
53ded495 | 3289 | return -ENOMEM; |
2450418c | 3290 | } |
1c20f2d2 | 3291 | memcpy(&con->in_msg->hdr, &con->in_hdr, sizeof(con->in_hdr)); |
2450418c | 3292 | |
1c20f2d2 AE |
3293 | if (middle_len && !con->in_msg->middle) { |
3294 | ret = ceph_alloc_middle(con, con->in_msg); | |
2450418c | 3295 | if (ret < 0) { |
1c20f2d2 AE |
3296 | ceph_msg_put(con->in_msg); |
3297 | con->in_msg = NULL; | |
2450418c YS |
3298 | } |
3299 | } | |
9d7f0f13 | 3300 | |
4740a623 | 3301 | return ret; |
2450418c YS |
3302 | } |
3303 | ||
31b8006e SW |
3304 | |
3305 | /* | |
3306 | * Free a generically kmalloc'd message. | |
3307 | */ | |
3308 | void ceph_msg_kfree(struct ceph_msg *m) | |
3309 | { | |
3310 | dout("msg_kfree %p\n", m); | |
3311 | if (m->front_is_vmalloc) | |
3312 | vfree(m->front.iov_base); | |
3313 | else | |
3314 | kfree(m->front.iov_base); | |
3315 | kfree(m); | |
3316 | } | |
3317 | ||
3318 | /* | |
3319 | * Drop a msg ref. Destroy as needed. | |
3320 | */ | |
c2e552e7 SW |
3321 | void ceph_msg_last_put(struct kref *kref) |
3322 | { | |
3323 | struct ceph_msg *m = container_of(kref, struct ceph_msg, kref); | |
31b8006e | 3324 | |
c2e552e7 SW |
3325 | dout("ceph_msg_put last one on %p\n", m); |
3326 | WARN_ON(!list_empty(&m->list_head)); | |
3327 | ||
3328 | /* drop middle, data, if any */ | |
3329 | if (m->middle) { | |
3330 | ceph_buffer_put(m->middle); | |
3331 | m->middle = NULL; | |
31b8006e | 3332 | } |
97fb1c7f | 3333 | if (ceph_msg_has_pages(m)) { |
f9e15777 AE |
3334 | m->p.length = 0; |
3335 | m->p.pages = NULL; | |
888334f9 | 3336 | m->p.type = CEPH_OSD_DATA_TYPE_NONE; |
97fb1c7f | 3337 | } |
97fb1c7f | 3338 | if (ceph_msg_has_pagelist(m)) { |
f9e15777 AE |
3339 | ceph_pagelist_release(m->l.pagelist); |
3340 | kfree(m->l.pagelist); | |
3341 | m->l.pagelist = NULL; | |
888334f9 AE |
3342 | m->l.type = CEPH_OSD_DATA_TYPE_NONE; |
3343 | } | |
3344 | if (ceph_msg_has_bio(m)) { | |
3345 | m->b.bio = NULL; | |
3346 | m->b.type = CEPH_OSD_DATA_TYPE_NONE; | |
58bb3b37 SW |
3347 | } |
3348 | ||
c2e552e7 SW |
3349 | if (m->pool) |
3350 | ceph_msgpool_put(m->pool, m); | |
3351 | else | |
3352 | ceph_msg_kfree(m); | |
31b8006e | 3353 | } |
3d14c5d2 | 3354 | EXPORT_SYMBOL(ceph_msg_last_put); |
9ec7cab1 SW |
3355 | |
3356 | void ceph_msg_dump(struct ceph_msg *msg) | |
3357 | { | |
4a73ef27 | 3358 | pr_debug("msg_dump %p (front_max %d length %zd)\n", msg, |
f9e15777 | 3359 | msg->front_max, msg->p.length); |
9ec7cab1 SW |
3360 | print_hex_dump(KERN_DEBUG, "header: ", |
3361 | DUMP_PREFIX_OFFSET, 16, 1, | |
3362 | &msg->hdr, sizeof(msg->hdr), true); | |
3363 | print_hex_dump(KERN_DEBUG, " front: ", | |
3364 | DUMP_PREFIX_OFFSET, 16, 1, | |
3365 | msg->front.iov_base, msg->front.iov_len, true); | |
3366 | if (msg->middle) | |
3367 | print_hex_dump(KERN_DEBUG, "middle: ", | |
3368 | DUMP_PREFIX_OFFSET, 16, 1, | |
3369 | msg->middle->vec.iov_base, | |
3370 | msg->middle->vec.iov_len, true); | |
3371 | print_hex_dump(KERN_DEBUG, "footer: ", | |
3372 | DUMP_PREFIX_OFFSET, 16, 1, | |
3373 | &msg->footer, sizeof(msg->footer), true); | |
3374 | } | |
3d14c5d2 | 3375 | EXPORT_SYMBOL(ceph_msg_dump); |