Commit | Line | Data |
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3d14c5d2 | 1 | #include <linux/ceph/ceph_debug.h> |
31b8006e SW |
2 | |
3 | #include <linux/crc32c.h> | |
4 | #include <linux/ctype.h> | |
5 | #include <linux/highmem.h> | |
6 | #include <linux/inet.h> | |
7 | #include <linux/kthread.h> | |
8 | #include <linux/net.h> | |
757856d2 | 9 | #include <linux/nsproxy.h> |
5a0e3ad6 | 10 | #include <linux/slab.h> |
31b8006e SW |
11 | #include <linux/socket.h> |
12 | #include <linux/string.h> | |
3ebc21f7 | 13 | #ifdef CONFIG_BLOCK |
68b4476b | 14 | #include <linux/bio.h> |
3ebc21f7 | 15 | #endif /* CONFIG_BLOCK */ |
ee3b56f2 | 16 | #include <linux/dns_resolver.h> |
31b8006e SW |
17 | #include <net/tcp.h> |
18 | ||
2b3e0c90 | 19 | #include <linux/ceph/ceph_features.h> |
3d14c5d2 YS |
20 | #include <linux/ceph/libceph.h> |
21 | #include <linux/ceph/messenger.h> | |
22 | #include <linux/ceph/decode.h> | |
23 | #include <linux/ceph/pagelist.h> | |
bc3b2d7f | 24 | #include <linux/export.h> |
31b8006e SW |
25 | |
26 | /* | |
27 | * Ceph uses the messenger to exchange ceph_msg messages with other | |
28 | * hosts in the system. The messenger provides ordered and reliable | |
29 | * delivery. We tolerate TCP disconnects by reconnecting (with | |
30 | * exponential backoff) in the case of a fault (disconnection, bad | |
31 | * crc, protocol error). Acks allow sent messages to be discarded by | |
32 | * the sender. | |
33 | */ | |
34 | ||
bc18f4b1 AE |
35 | /* |
36 | * We track the state of the socket on a given connection using | |
37 | * values defined below. The transition to a new socket state is | |
38 | * handled by a function which verifies we aren't coming from an | |
39 | * unexpected state. | |
40 | * | |
41 | * -------- | |
42 | * | NEW* | transient initial state | |
43 | * -------- | |
44 | * | con_sock_state_init() | |
45 | * v | |
46 | * ---------- | |
47 | * | CLOSED | initialized, but no socket (and no | |
48 | * ---------- TCP connection) | |
49 | * ^ \ | |
50 | * | \ con_sock_state_connecting() | |
51 | * | ---------------------- | |
52 | * | \ | |
53 | * + con_sock_state_closed() \ | |
fbb85a47 SW |
54 | * |+--------------------------- \ |
55 | * | \ \ \ | |
56 | * | ----------- \ \ | |
57 | * | | CLOSING | socket event; \ \ | |
58 | * | ----------- await close \ \ | |
59 | * | ^ \ | | |
60 | * | | \ | | |
61 | * | + con_sock_state_closing() \ | | |
62 | * | / \ | | | |
63 | * | / --------------- | | | |
64 | * | / \ v v | |
bc18f4b1 AE |
65 | * | / -------------- |
66 | * | / -----------------| CONNECTING | socket created, TCP | |
67 | * | | / -------------- connect initiated | |
68 | * | | | con_sock_state_connected() | |
69 | * | | v | |
70 | * ------------- | |
71 | * | CONNECTED | TCP connection established | |
72 | * ------------- | |
73 | * | |
74 | * State values for ceph_connection->sock_state; NEW is assumed to be 0. | |
75 | */ | |
ce2c8903 AE |
76 | |
77 | #define CON_SOCK_STATE_NEW 0 /* -> CLOSED */ | |
78 | #define CON_SOCK_STATE_CLOSED 1 /* -> CONNECTING */ | |
79 | #define CON_SOCK_STATE_CONNECTING 2 /* -> CONNECTED or -> CLOSING */ | |
80 | #define CON_SOCK_STATE_CONNECTED 3 /* -> CLOSING or -> CLOSED */ | |
81 | #define CON_SOCK_STATE_CLOSING 4 /* -> CLOSED */ | |
82 | ||
8dacc7da SW |
83 | /* |
84 | * connection states | |
85 | */ | |
86 | #define CON_STATE_CLOSED 1 /* -> PREOPEN */ | |
87 | #define CON_STATE_PREOPEN 2 /* -> CONNECTING, CLOSED */ | |
88 | #define CON_STATE_CONNECTING 3 /* -> NEGOTIATING, CLOSED */ | |
89 | #define CON_STATE_NEGOTIATING 4 /* -> OPEN, CLOSED */ | |
90 | #define CON_STATE_OPEN 5 /* -> STANDBY, CLOSED */ | |
91 | #define CON_STATE_STANDBY 6 /* -> PREOPEN, CLOSED */ | |
92 | ||
4a861692 SW |
93 | /* |
94 | * ceph_connection flag bits | |
95 | */ | |
96 | #define CON_FLAG_LOSSYTX 0 /* we can close channel or drop | |
97 | * messages on errors */ | |
98 | #define CON_FLAG_KEEPALIVE_PENDING 1 /* we need to send a keepalive */ | |
99 | #define CON_FLAG_WRITE_PENDING 2 /* we have data ready to send */ | |
100 | #define CON_FLAG_SOCK_CLOSED 3 /* socket state changed to closed */ | |
101 | #define CON_FLAG_BACKOFF 4 /* need to retry queuing delayed work */ | |
8dacc7da | 102 | |
c9ffc77a AE |
103 | static bool con_flag_valid(unsigned long con_flag) |
104 | { | |
105 | switch (con_flag) { | |
106 | case CON_FLAG_LOSSYTX: | |
107 | case CON_FLAG_KEEPALIVE_PENDING: | |
108 | case CON_FLAG_WRITE_PENDING: | |
109 | case CON_FLAG_SOCK_CLOSED: | |
110 | case CON_FLAG_BACKOFF: | |
111 | return true; | |
112 | default: | |
113 | return false; | |
114 | } | |
115 | } | |
116 | ||
117 | static void con_flag_clear(struct ceph_connection *con, unsigned long con_flag) | |
118 | { | |
119 | BUG_ON(!con_flag_valid(con_flag)); | |
120 | ||
121 | clear_bit(con_flag, &con->flags); | |
122 | } | |
123 | ||
124 | static void con_flag_set(struct ceph_connection *con, unsigned long con_flag) | |
125 | { | |
126 | BUG_ON(!con_flag_valid(con_flag)); | |
127 | ||
128 | set_bit(con_flag, &con->flags); | |
129 | } | |
130 | ||
131 | static bool con_flag_test(struct ceph_connection *con, unsigned long con_flag) | |
132 | { | |
133 | BUG_ON(!con_flag_valid(con_flag)); | |
134 | ||
135 | return test_bit(con_flag, &con->flags); | |
136 | } | |
137 | ||
138 | static bool con_flag_test_and_clear(struct ceph_connection *con, | |
139 | unsigned long con_flag) | |
140 | { | |
141 | BUG_ON(!con_flag_valid(con_flag)); | |
142 | ||
143 | return test_and_clear_bit(con_flag, &con->flags); | |
144 | } | |
145 | ||
146 | static bool con_flag_test_and_set(struct ceph_connection *con, | |
147 | unsigned long con_flag) | |
148 | { | |
149 | BUG_ON(!con_flag_valid(con_flag)); | |
150 | ||
151 | return test_and_set_bit(con_flag, &con->flags); | |
152 | } | |
153 | ||
e3d5d638 AE |
154 | /* Slab caches for frequently-allocated structures */ |
155 | ||
156 | static struct kmem_cache *ceph_msg_cache; | |
81b36be4 | 157 | static struct kmem_cache *ceph_msg_data_cache; |
e3d5d638 | 158 | |
31b8006e SW |
159 | /* static tag bytes (protocol control messages) */ |
160 | static char tag_msg = CEPH_MSGR_TAG_MSG; | |
161 | static char tag_ack = CEPH_MSGR_TAG_ACK; | |
162 | static char tag_keepalive = CEPH_MSGR_TAG_KEEPALIVE; | |
8b9558aa | 163 | static char tag_keepalive2 = CEPH_MSGR_TAG_KEEPALIVE2; |
31b8006e | 164 | |
a6a5349d SW |
165 | #ifdef CONFIG_LOCKDEP |
166 | static struct lock_class_key socket_class; | |
167 | #endif | |
168 | ||
84495f49 AE |
169 | /* |
170 | * When skipping (ignoring) a block of input we read it into a "skip | |
171 | * buffer," which is this many bytes in size. | |
172 | */ | |
173 | #define SKIP_BUF_SIZE 1024 | |
31b8006e SW |
174 | |
175 | static void queue_con(struct ceph_connection *con); | |
37ab77ac | 176 | static void cancel_con(struct ceph_connection *con); |
68931622 | 177 | static void ceph_con_workfn(struct work_struct *); |
93209264 | 178 | static void con_fault(struct ceph_connection *con); |
31b8006e | 179 | |
31b8006e | 180 | /* |
f64a9317 AE |
181 | * Nicely render a sockaddr as a string. An array of formatted |
182 | * strings is used, to approximate reentrancy. | |
31b8006e | 183 | */ |
f64a9317 AE |
184 | #define ADDR_STR_COUNT_LOG 5 /* log2(# address strings in array) */ |
185 | #define ADDR_STR_COUNT (1 << ADDR_STR_COUNT_LOG) | |
186 | #define ADDR_STR_COUNT_MASK (ADDR_STR_COUNT - 1) | |
187 | #define MAX_ADDR_STR_LEN 64 /* 54 is enough */ | |
188 | ||
189 | static char addr_str[ADDR_STR_COUNT][MAX_ADDR_STR_LEN]; | |
190 | static atomic_t addr_str_seq = ATOMIC_INIT(0); | |
31b8006e | 191 | |
57666519 | 192 | static struct page *zero_page; /* used in certain error cases */ |
57666519 | 193 | |
3d14c5d2 | 194 | const char *ceph_pr_addr(const struct sockaddr_storage *ss) |
31b8006e SW |
195 | { |
196 | int i; | |
197 | char *s; | |
99f0f3b2 AE |
198 | struct sockaddr_in *in4 = (struct sockaddr_in *) ss; |
199 | struct sockaddr_in6 *in6 = (struct sockaddr_in6 *) ss; | |
31b8006e | 200 | |
f64a9317 | 201 | i = atomic_inc_return(&addr_str_seq) & ADDR_STR_COUNT_MASK; |
31b8006e SW |
202 | s = addr_str[i]; |
203 | ||
204 | switch (ss->ss_family) { | |
205 | case AF_INET: | |
bd406145 AE |
206 | snprintf(s, MAX_ADDR_STR_LEN, "%pI4:%hu", &in4->sin_addr, |
207 | ntohs(in4->sin_port)); | |
31b8006e SW |
208 | break; |
209 | ||
210 | case AF_INET6: | |
bd406145 AE |
211 | snprintf(s, MAX_ADDR_STR_LEN, "[%pI6c]:%hu", &in6->sin6_addr, |
212 | ntohs(in6->sin6_port)); | |
31b8006e SW |
213 | break; |
214 | ||
215 | default: | |
d3002b97 AE |
216 | snprintf(s, MAX_ADDR_STR_LEN, "(unknown sockaddr family %hu)", |
217 | ss->ss_family); | |
31b8006e SW |
218 | } |
219 | ||
220 | return s; | |
221 | } | |
3d14c5d2 | 222 | EXPORT_SYMBOL(ceph_pr_addr); |
31b8006e | 223 | |
63f2d211 SW |
224 | static void encode_my_addr(struct ceph_messenger *msgr) |
225 | { | |
226 | memcpy(&msgr->my_enc_addr, &msgr->inst.addr, sizeof(msgr->my_enc_addr)); | |
227 | ceph_encode_addr(&msgr->my_enc_addr); | |
228 | } | |
229 | ||
31b8006e SW |
230 | /* |
231 | * work queue for all reading and writing to/from the socket. | |
232 | */ | |
e0f43c94 | 233 | static struct workqueue_struct *ceph_msgr_wq; |
31b8006e | 234 | |
e3d5d638 AE |
235 | static int ceph_msgr_slab_init(void) |
236 | { | |
237 | BUG_ON(ceph_msg_cache); | |
5ee61e95 | 238 | ceph_msg_cache = KMEM_CACHE(ceph_msg, 0); |
81b36be4 AE |
239 | if (!ceph_msg_cache) |
240 | return -ENOMEM; | |
241 | ||
242 | BUG_ON(ceph_msg_data_cache); | |
5ee61e95 | 243 | ceph_msg_data_cache = KMEM_CACHE(ceph_msg_data, 0); |
81b36be4 AE |
244 | if (ceph_msg_data_cache) |
245 | return 0; | |
246 | ||
247 | kmem_cache_destroy(ceph_msg_cache); | |
248 | ceph_msg_cache = NULL; | |
249 | ||
250 | return -ENOMEM; | |
e3d5d638 AE |
251 | } |
252 | ||
253 | static void ceph_msgr_slab_exit(void) | |
254 | { | |
81b36be4 AE |
255 | BUG_ON(!ceph_msg_data_cache); |
256 | kmem_cache_destroy(ceph_msg_data_cache); | |
257 | ceph_msg_data_cache = NULL; | |
258 | ||
e3d5d638 AE |
259 | BUG_ON(!ceph_msg_cache); |
260 | kmem_cache_destroy(ceph_msg_cache); | |
261 | ceph_msg_cache = NULL; | |
262 | } | |
263 | ||
15417167 | 264 | static void _ceph_msgr_exit(void) |
6173d1f0 | 265 | { |
d3002b97 | 266 | if (ceph_msgr_wq) { |
6173d1f0 | 267 | destroy_workqueue(ceph_msgr_wq); |
d3002b97 AE |
268 | ceph_msgr_wq = NULL; |
269 | } | |
6173d1f0 | 270 | |
6173d1f0 | 271 | BUG_ON(zero_page == NULL); |
09cbfeaf | 272 | put_page(zero_page); |
6173d1f0 | 273 | zero_page = NULL; |
d920ff6f BC |
274 | |
275 | ceph_msgr_slab_exit(); | |
6173d1f0 AE |
276 | } |
277 | ||
3d14c5d2 | 278 | int ceph_msgr_init(void) |
31b8006e | 279 | { |
d920ff6f BC |
280 | if (ceph_msgr_slab_init()) |
281 | return -ENOMEM; | |
282 | ||
57666519 AE |
283 | BUG_ON(zero_page != NULL); |
284 | zero_page = ZERO_PAGE(0); | |
09cbfeaf | 285 | get_page(zero_page); |
57666519 | 286 | |
f9865f06 ID |
287 | /* |
288 | * The number of active work items is limited by the number of | |
289 | * connections, so leave @max_active at default. | |
290 | */ | |
291 | ceph_msgr_wq = alloc_workqueue("ceph-msgr", WQ_MEM_RECLAIM, 0); | |
6173d1f0 AE |
292 | if (ceph_msgr_wq) |
293 | return 0; | |
57666519 | 294 | |
6173d1f0 AE |
295 | pr_err("msgr_init failed to create workqueue\n"); |
296 | _ceph_msgr_exit(); | |
57666519 | 297 | |
6173d1f0 | 298 | return -ENOMEM; |
31b8006e | 299 | } |
3d14c5d2 | 300 | EXPORT_SYMBOL(ceph_msgr_init); |
31b8006e SW |
301 | |
302 | void ceph_msgr_exit(void) | |
303 | { | |
57666519 | 304 | BUG_ON(ceph_msgr_wq == NULL); |
57666519 | 305 | |
6173d1f0 | 306 | _ceph_msgr_exit(); |
31b8006e | 307 | } |
3d14c5d2 | 308 | EXPORT_SYMBOL(ceph_msgr_exit); |
31b8006e | 309 | |
cd84db6e | 310 | void ceph_msgr_flush(void) |
a922d38f SW |
311 | { |
312 | flush_workqueue(ceph_msgr_wq); | |
313 | } | |
3d14c5d2 | 314 | EXPORT_SYMBOL(ceph_msgr_flush); |
a922d38f | 315 | |
ce2c8903 AE |
316 | /* Connection socket state transition functions */ |
317 | ||
318 | static void con_sock_state_init(struct ceph_connection *con) | |
319 | { | |
320 | int old_state; | |
321 | ||
322 | old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CLOSED); | |
323 | if (WARN_ON(old_state != CON_SOCK_STATE_NEW)) | |
324 | printk("%s: unexpected old state %d\n", __func__, old_state); | |
8007b8d6 SW |
325 | dout("%s con %p sock %d -> %d\n", __func__, con, old_state, |
326 | CON_SOCK_STATE_CLOSED); | |
ce2c8903 AE |
327 | } |
328 | ||
329 | static void con_sock_state_connecting(struct ceph_connection *con) | |
330 | { | |
331 | int old_state; | |
332 | ||
333 | old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CONNECTING); | |
334 | if (WARN_ON(old_state != CON_SOCK_STATE_CLOSED)) | |
335 | printk("%s: unexpected old state %d\n", __func__, old_state); | |
8007b8d6 SW |
336 | dout("%s con %p sock %d -> %d\n", __func__, con, old_state, |
337 | CON_SOCK_STATE_CONNECTING); | |
ce2c8903 AE |
338 | } |
339 | ||
340 | static void con_sock_state_connected(struct ceph_connection *con) | |
341 | { | |
342 | int old_state; | |
343 | ||
344 | old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CONNECTED); | |
345 | if (WARN_ON(old_state != CON_SOCK_STATE_CONNECTING)) | |
346 | printk("%s: unexpected old state %d\n", __func__, old_state); | |
8007b8d6 SW |
347 | dout("%s con %p sock %d -> %d\n", __func__, con, old_state, |
348 | CON_SOCK_STATE_CONNECTED); | |
ce2c8903 AE |
349 | } |
350 | ||
351 | static void con_sock_state_closing(struct ceph_connection *con) | |
352 | { | |
353 | int old_state; | |
354 | ||
355 | old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CLOSING); | |
356 | if (WARN_ON(old_state != CON_SOCK_STATE_CONNECTING && | |
357 | old_state != CON_SOCK_STATE_CONNECTED && | |
358 | old_state != CON_SOCK_STATE_CLOSING)) | |
359 | printk("%s: unexpected old state %d\n", __func__, old_state); | |
8007b8d6 SW |
360 | dout("%s con %p sock %d -> %d\n", __func__, con, old_state, |
361 | CON_SOCK_STATE_CLOSING); | |
ce2c8903 AE |
362 | } |
363 | ||
364 | static void con_sock_state_closed(struct ceph_connection *con) | |
365 | { | |
366 | int old_state; | |
367 | ||
368 | old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CLOSED); | |
369 | if (WARN_ON(old_state != CON_SOCK_STATE_CONNECTED && | |
fbb85a47 | 370 | old_state != CON_SOCK_STATE_CLOSING && |
8007b8d6 SW |
371 | old_state != CON_SOCK_STATE_CONNECTING && |
372 | old_state != CON_SOCK_STATE_CLOSED)) | |
ce2c8903 | 373 | printk("%s: unexpected old state %d\n", __func__, old_state); |
8007b8d6 SW |
374 | dout("%s con %p sock %d -> %d\n", __func__, con, old_state, |
375 | CON_SOCK_STATE_CLOSED); | |
ce2c8903 | 376 | } |
a922d38f | 377 | |
31b8006e SW |
378 | /* |
379 | * socket callback functions | |
380 | */ | |
381 | ||
382 | /* data available on socket, or listen socket received a connect */ | |
676d2369 | 383 | static void ceph_sock_data_ready(struct sock *sk) |
31b8006e | 384 | { |
bd406145 | 385 | struct ceph_connection *con = sk->sk_user_data; |
a2a32584 GH |
386 | if (atomic_read(&con->msgr->stopping)) { |
387 | return; | |
388 | } | |
bd406145 | 389 | |
31b8006e | 390 | if (sk->sk_state != TCP_CLOSE_WAIT) { |
327800bd | 391 | dout("%s on %p state = %lu, queueing work\n", __func__, |
31b8006e SW |
392 | con, con->state); |
393 | queue_con(con); | |
394 | } | |
395 | } | |
396 | ||
397 | /* socket has buffer space for writing */ | |
327800bd | 398 | static void ceph_sock_write_space(struct sock *sk) |
31b8006e | 399 | { |
d3002b97 | 400 | struct ceph_connection *con = sk->sk_user_data; |
31b8006e | 401 | |
182fac26 JS |
402 | /* only queue to workqueue if there is data we want to write, |
403 | * and there is sufficient space in the socket buffer to accept | |
327800bd | 404 | * more data. clear SOCK_NOSPACE so that ceph_sock_write_space() |
182fac26 JS |
405 | * doesn't get called again until try_write() fills the socket |
406 | * buffer. See net/ipv4/tcp_input.c:tcp_check_space() | |
407 | * and net/core/stream.c:sk_stream_write_space(). | |
408 | */ | |
c9ffc77a | 409 | if (con_flag_test(con, CON_FLAG_WRITE_PENDING)) { |
64dc6130 | 410 | if (sk_stream_is_writeable(sk)) { |
327800bd | 411 | dout("%s %p queueing write work\n", __func__, con); |
182fac26 JS |
412 | clear_bit(SOCK_NOSPACE, &sk->sk_socket->flags); |
413 | queue_con(con); | |
414 | } | |
31b8006e | 415 | } else { |
327800bd | 416 | dout("%s %p nothing to write\n", __func__, con); |
31b8006e | 417 | } |
31b8006e SW |
418 | } |
419 | ||
420 | /* socket's state has changed */ | |
327800bd | 421 | static void ceph_sock_state_change(struct sock *sk) |
31b8006e | 422 | { |
bd406145 | 423 | struct ceph_connection *con = sk->sk_user_data; |
31b8006e | 424 | |
327800bd | 425 | dout("%s %p state = %lu sk_state = %u\n", __func__, |
31b8006e SW |
426 | con, con->state, sk->sk_state); |
427 | ||
31b8006e SW |
428 | switch (sk->sk_state) { |
429 | case TCP_CLOSE: | |
327800bd | 430 | dout("%s TCP_CLOSE\n", __func__); |
31b8006e | 431 | case TCP_CLOSE_WAIT: |
327800bd | 432 | dout("%s TCP_CLOSE_WAIT\n", __func__); |
ce2c8903 | 433 | con_sock_state_closing(con); |
c9ffc77a | 434 | con_flag_set(con, CON_FLAG_SOCK_CLOSED); |
d65c9e0b | 435 | queue_con(con); |
31b8006e SW |
436 | break; |
437 | case TCP_ESTABLISHED: | |
327800bd | 438 | dout("%s TCP_ESTABLISHED\n", __func__); |
ce2c8903 | 439 | con_sock_state_connected(con); |
31b8006e SW |
440 | queue_con(con); |
441 | break; | |
d3002b97 AE |
442 | default: /* Everything else is uninteresting */ |
443 | break; | |
31b8006e SW |
444 | } |
445 | } | |
446 | ||
447 | /* | |
448 | * set up socket callbacks | |
449 | */ | |
450 | static void set_sock_callbacks(struct socket *sock, | |
451 | struct ceph_connection *con) | |
452 | { | |
453 | struct sock *sk = sock->sk; | |
bd406145 | 454 | sk->sk_user_data = con; |
327800bd AE |
455 | sk->sk_data_ready = ceph_sock_data_ready; |
456 | sk->sk_write_space = ceph_sock_write_space; | |
457 | sk->sk_state_change = ceph_sock_state_change; | |
31b8006e SW |
458 | } |
459 | ||
460 | ||
461 | /* | |
462 | * socket helpers | |
463 | */ | |
464 | ||
465 | /* | |
466 | * initiate connection to a remote socket. | |
467 | */ | |
41617d0c | 468 | static int ceph_tcp_connect(struct ceph_connection *con) |
31b8006e | 469 | { |
f91d3471 | 470 | struct sockaddr_storage *paddr = &con->peer_addr.in_addr; |
31b8006e SW |
471 | struct socket *sock; |
472 | int ret; | |
473 | ||
474 | BUG_ON(con->sock); | |
757856d2 | 475 | ret = sock_create_kern(read_pnet(&con->msgr->net), paddr->ss_family, |
eeb1bd5c | 476 | SOCK_STREAM, IPPROTO_TCP, &sock); |
31b8006e | 477 | if (ret) |
41617d0c | 478 | return ret; |
6d7fdb0a | 479 | sock->sk->sk_allocation = GFP_NOFS; |
31b8006e | 480 | |
a6a5349d SW |
481 | #ifdef CONFIG_LOCKDEP |
482 | lockdep_set_class(&sock->sk->sk_lock, &socket_class); | |
483 | #endif | |
484 | ||
31b8006e SW |
485 | set_sock_callbacks(sock, con); |
486 | ||
3d14c5d2 | 487 | dout("connect %s\n", ceph_pr_addr(&con->peer_addr.in_addr)); |
31b8006e | 488 | |
89a86be0 | 489 | con_sock_state_connecting(con); |
f91d3471 SW |
490 | ret = sock->ops->connect(sock, (struct sockaddr *)paddr, sizeof(*paddr), |
491 | O_NONBLOCK); | |
31b8006e SW |
492 | if (ret == -EINPROGRESS) { |
493 | dout("connect %s EINPROGRESS sk_state = %u\n", | |
3d14c5d2 | 494 | ceph_pr_addr(&con->peer_addr.in_addr), |
31b8006e | 495 | sock->sk->sk_state); |
a5bc3129 | 496 | } else if (ret < 0) { |
31b8006e | 497 | pr_err("connect %s error %d\n", |
3d14c5d2 | 498 | ceph_pr_addr(&con->peer_addr.in_addr), ret); |
31b8006e | 499 | sock_release(sock); |
41617d0c | 500 | return ret; |
a5bc3129 | 501 | } |
89baaa57 | 502 | |
859bff51 | 503 | if (ceph_test_opt(from_msgr(con->msgr), TCP_NODELAY)) { |
ba988f87 CH |
504 | int optval = 1; |
505 | ||
506 | ret = kernel_setsockopt(sock, SOL_TCP, TCP_NODELAY, | |
507 | (char *)&optval, sizeof(optval)); | |
508 | if (ret) | |
509 | pr_err("kernel_setsockopt(TCP_NODELAY) failed: %d", | |
510 | ret); | |
511 | } | |
512 | ||
a5bc3129 | 513 | con->sock = sock; |
41617d0c | 514 | return 0; |
31b8006e SW |
515 | } |
516 | ||
517 | static int ceph_tcp_recvmsg(struct socket *sock, void *buf, size_t len) | |
518 | { | |
519 | struct kvec iov = {buf, len}; | |
520 | struct msghdr msg = { .msg_flags = MSG_DONTWAIT | MSG_NOSIGNAL }; | |
98bdb0aa | 521 | int r; |
31b8006e | 522 | |
98bdb0aa SW |
523 | r = kernel_recvmsg(sock, &msg, &iov, 1, len, msg.msg_flags); |
524 | if (r == -EAGAIN) | |
525 | r = 0; | |
526 | return r; | |
31b8006e SW |
527 | } |
528 | ||
afb3d90e AE |
529 | static int ceph_tcp_recvpage(struct socket *sock, struct page *page, |
530 | int page_offset, size_t length) | |
531 | { | |
532 | void *kaddr; | |
533 | int ret; | |
534 | ||
535 | BUG_ON(page_offset + length > PAGE_SIZE); | |
536 | ||
537 | kaddr = kmap(page); | |
538 | BUG_ON(!kaddr); | |
539 | ret = ceph_tcp_recvmsg(sock, kaddr + page_offset, length); | |
540 | kunmap(page); | |
541 | ||
542 | return ret; | |
543 | } | |
544 | ||
31b8006e SW |
545 | /* |
546 | * write something. @more is true if caller will be sending more data | |
547 | * shortly. | |
548 | */ | |
549 | static int ceph_tcp_sendmsg(struct socket *sock, struct kvec *iov, | |
550 | size_t kvlen, size_t len, int more) | |
551 | { | |
552 | struct msghdr msg = { .msg_flags = MSG_DONTWAIT | MSG_NOSIGNAL }; | |
42961d23 | 553 | int r; |
31b8006e SW |
554 | |
555 | if (more) | |
556 | msg.msg_flags |= MSG_MORE; | |
557 | else | |
558 | msg.msg_flags |= MSG_EOR; /* superfluous, but what the hell */ | |
559 | ||
42961d23 SW |
560 | r = kernel_sendmsg(sock, &msg, iov, kvlen, len); |
561 | if (r == -EAGAIN) | |
562 | r = 0; | |
563 | return r; | |
31b8006e SW |
564 | } |
565 | ||
178eda29 | 566 | static int __ceph_tcp_sendpage(struct socket *sock, struct page *page, |
e1dcb128 | 567 | int offset, size_t size, bool more) |
31739139 AE |
568 | { |
569 | int flags = MSG_DONTWAIT | MSG_NOSIGNAL | (more ? MSG_MORE : MSG_EOR); | |
570 | int ret; | |
571 | ||
572 | ret = kernel_sendpage(sock, page, offset, size, flags); | |
573 | if (ret == -EAGAIN) | |
574 | ret = 0; | |
575 | ||
576 | return ret; | |
577 | } | |
578 | ||
178eda29 CC |
579 | static int ceph_tcp_sendpage(struct socket *sock, struct page *page, |
580 | int offset, size_t size, bool more) | |
581 | { | |
582 | int ret; | |
583 | struct kvec iov; | |
584 | ||
585 | /* sendpage cannot properly handle pages with page_count == 0, | |
586 | * we need to fallback to sendmsg if that's the case */ | |
587 | if (page_count(page) >= 1) | |
588 | return __ceph_tcp_sendpage(sock, page, offset, size, more); | |
589 | ||
590 | iov.iov_base = kmap(page) + offset; | |
591 | iov.iov_len = size; | |
592 | ret = ceph_tcp_sendmsg(sock, &iov, 1, size, more); | |
593 | kunmap(page); | |
594 | ||
595 | return ret; | |
596 | } | |
31b8006e SW |
597 | |
598 | /* | |
599 | * Shutdown/close the socket for the given connection. | |
600 | */ | |
601 | static int con_close_socket(struct ceph_connection *con) | |
602 | { | |
8007b8d6 | 603 | int rc = 0; |
31b8006e SW |
604 | |
605 | dout("con_close_socket on %p sock %p\n", con, con->sock); | |
8007b8d6 SW |
606 | if (con->sock) { |
607 | rc = con->sock->ops->shutdown(con->sock, SHUT_RDWR); | |
608 | sock_release(con->sock); | |
609 | con->sock = NULL; | |
610 | } | |
456ea468 AE |
611 | |
612 | /* | |
4a861692 | 613 | * Forcibly clear the SOCK_CLOSED flag. It gets set |
456ea468 AE |
614 | * independent of the connection mutex, and we could have |
615 | * received a socket close event before we had the chance to | |
616 | * shut the socket down. | |
617 | */ | |
c9ffc77a | 618 | con_flag_clear(con, CON_FLAG_SOCK_CLOSED); |
8007b8d6 | 619 | |
ce2c8903 | 620 | con_sock_state_closed(con); |
31b8006e SW |
621 | return rc; |
622 | } | |
623 | ||
624 | /* | |
625 | * Reset a connection. Discard all incoming and outgoing messages | |
626 | * and clear *_seq state. | |
627 | */ | |
628 | static void ceph_msg_remove(struct ceph_msg *msg) | |
629 | { | |
630 | list_del_init(&msg->list_head); | |
38941f80 | 631 | |
31b8006e SW |
632 | ceph_msg_put(msg); |
633 | } | |
634 | static void ceph_msg_remove_list(struct list_head *head) | |
635 | { | |
636 | while (!list_empty(head)) { | |
637 | struct ceph_msg *msg = list_first_entry(head, struct ceph_msg, | |
638 | list_head); | |
639 | ceph_msg_remove(msg); | |
640 | } | |
641 | } | |
642 | ||
643 | static void reset_connection(struct ceph_connection *con) | |
644 | { | |
645 | /* reset connection, out_queue, msg_ and connect_seq */ | |
646 | /* discard existing out_queue and msg_seq */ | |
0fa6ebc6 | 647 | dout("reset_connection %p\n", con); |
31b8006e SW |
648 | ceph_msg_remove_list(&con->out_queue); |
649 | ceph_msg_remove_list(&con->out_sent); | |
650 | ||
cf3e5c40 | 651 | if (con->in_msg) { |
38941f80 | 652 | BUG_ON(con->in_msg->con != con); |
cf3e5c40 SW |
653 | ceph_msg_put(con->in_msg); |
654 | con->in_msg = NULL; | |
655 | } | |
656 | ||
31b8006e SW |
657 | con->connect_seq = 0; |
658 | con->out_seq = 0; | |
c86a2930 | 659 | if (con->out_msg) { |
583d0fef | 660 | BUG_ON(con->out_msg->con != con); |
c86a2930 SW |
661 | ceph_msg_put(con->out_msg); |
662 | con->out_msg = NULL; | |
663 | } | |
31b8006e | 664 | con->in_seq = 0; |
0e0d5e0c | 665 | con->in_seq_acked = 0; |
67645d76 ID |
666 | |
667 | con->out_skip = 0; | |
31b8006e SW |
668 | } |
669 | ||
670 | /* | |
671 | * mark a peer down. drop any open connections. | |
672 | */ | |
673 | void ceph_con_close(struct ceph_connection *con) | |
674 | { | |
8c50c817 | 675 | mutex_lock(&con->mutex); |
3d14c5d2 YS |
676 | dout("con_close %p peer %s\n", con, |
677 | ceph_pr_addr(&con->peer_addr.in_addr)); | |
8dacc7da | 678 | con->state = CON_STATE_CLOSED; |
a5988c49 | 679 | |
c9ffc77a AE |
680 | con_flag_clear(con, CON_FLAG_LOSSYTX); /* so we retry next connect */ |
681 | con_flag_clear(con, CON_FLAG_KEEPALIVE_PENDING); | |
682 | con_flag_clear(con, CON_FLAG_WRITE_PENDING); | |
683 | con_flag_clear(con, CON_FLAG_BACKOFF); | |
a5988c49 | 684 | |
31b8006e | 685 | reset_connection(con); |
6f2bc3ff | 686 | con->peer_global_seq = 0; |
37ab77ac | 687 | cancel_con(con); |
ee76e073 | 688 | con_close_socket(con); |
ec302645 | 689 | mutex_unlock(&con->mutex); |
31b8006e | 690 | } |
3d14c5d2 | 691 | EXPORT_SYMBOL(ceph_con_close); |
31b8006e | 692 | |
31b8006e SW |
693 | /* |
694 | * Reopen a closed connection, with a new peer address. | |
695 | */ | |
b7a9e5dd SW |
696 | void ceph_con_open(struct ceph_connection *con, |
697 | __u8 entity_type, __u64 entity_num, | |
698 | struct ceph_entity_addr *addr) | |
31b8006e | 699 | { |
5469155f | 700 | mutex_lock(&con->mutex); |
3d14c5d2 | 701 | dout("con_open %p %s\n", con, ceph_pr_addr(&addr->in_addr)); |
8dacc7da | 702 | |
122070a2 | 703 | WARN_ON(con->state != CON_STATE_CLOSED); |
8dacc7da | 704 | con->state = CON_STATE_PREOPEN; |
a5988c49 | 705 | |
b7a9e5dd SW |
706 | con->peer_name.type = (__u8) entity_type; |
707 | con->peer_name.num = cpu_to_le64(entity_num); | |
708 | ||
31b8006e | 709 | memcpy(&con->peer_addr, addr, sizeof(*addr)); |
03c677e1 | 710 | con->delay = 0; /* reset backoff memory */ |
5469155f | 711 | mutex_unlock(&con->mutex); |
31b8006e SW |
712 | queue_con(con); |
713 | } | |
3d14c5d2 | 714 | EXPORT_SYMBOL(ceph_con_open); |
31b8006e | 715 | |
87b315a5 SW |
716 | /* |
717 | * return true if this connection ever successfully opened | |
718 | */ | |
719 | bool ceph_con_opened(struct ceph_connection *con) | |
720 | { | |
721 | return con->connect_seq > 0; | |
722 | } | |
723 | ||
31b8006e SW |
724 | /* |
725 | * initialize a new connection. | |
726 | */ | |
1bfd89f4 AE |
727 | void ceph_con_init(struct ceph_connection *con, void *private, |
728 | const struct ceph_connection_operations *ops, | |
b7a9e5dd | 729 | struct ceph_messenger *msgr) |
31b8006e SW |
730 | { |
731 | dout("con_init %p\n", con); | |
732 | memset(con, 0, sizeof(*con)); | |
1bfd89f4 AE |
733 | con->private = private; |
734 | con->ops = ops; | |
31b8006e | 735 | con->msgr = msgr; |
ce2c8903 AE |
736 | |
737 | con_sock_state_init(con); | |
738 | ||
ec302645 | 739 | mutex_init(&con->mutex); |
31b8006e SW |
740 | INIT_LIST_HEAD(&con->out_queue); |
741 | INIT_LIST_HEAD(&con->out_sent); | |
68931622 | 742 | INIT_DELAYED_WORK(&con->work, ceph_con_workfn); |
a5988c49 | 743 | |
8dacc7da | 744 | con->state = CON_STATE_CLOSED; |
31b8006e | 745 | } |
3d14c5d2 | 746 | EXPORT_SYMBOL(ceph_con_init); |
31b8006e SW |
747 | |
748 | ||
749 | /* | |
750 | * We maintain a global counter to order connection attempts. Get | |
751 | * a unique seq greater than @gt. | |
752 | */ | |
753 | static u32 get_global_seq(struct ceph_messenger *msgr, u32 gt) | |
754 | { | |
755 | u32 ret; | |
756 | ||
757 | spin_lock(&msgr->global_seq_lock); | |
758 | if (msgr->global_seq < gt) | |
759 | msgr->global_seq = gt; | |
760 | ret = ++msgr->global_seq; | |
761 | spin_unlock(&msgr->global_seq_lock); | |
762 | return ret; | |
763 | } | |
764 | ||
e2200423 | 765 | static void con_out_kvec_reset(struct ceph_connection *con) |
859eb799 | 766 | { |
67645d76 ID |
767 | BUG_ON(con->out_skip); |
768 | ||
859eb799 AE |
769 | con->out_kvec_left = 0; |
770 | con->out_kvec_bytes = 0; | |
771 | con->out_kvec_cur = &con->out_kvec[0]; | |
772 | } | |
773 | ||
e2200423 | 774 | static void con_out_kvec_add(struct ceph_connection *con, |
859eb799 AE |
775 | size_t size, void *data) |
776 | { | |
67645d76 | 777 | int index = con->out_kvec_left; |
859eb799 | 778 | |
67645d76 | 779 | BUG_ON(con->out_skip); |
859eb799 AE |
780 | BUG_ON(index >= ARRAY_SIZE(con->out_kvec)); |
781 | ||
782 | con->out_kvec[index].iov_len = size; | |
783 | con->out_kvec[index].iov_base = data; | |
784 | con->out_kvec_left++; | |
785 | con->out_kvec_bytes += size; | |
786 | } | |
31b8006e | 787 | |
67645d76 ID |
788 | /* |
789 | * Chop off a kvec from the end. Return residual number of bytes for | |
790 | * that kvec, i.e. how many bytes would have been written if the kvec | |
791 | * hadn't been nuked. | |
792 | */ | |
793 | static int con_out_kvec_skip(struct ceph_connection *con) | |
794 | { | |
795 | int off = con->out_kvec_cur - con->out_kvec; | |
796 | int skip = 0; | |
797 | ||
798 | if (con->out_kvec_bytes > 0) { | |
799 | skip = con->out_kvec[off + con->out_kvec_left - 1].iov_len; | |
800 | BUG_ON(con->out_kvec_bytes < skip); | |
801 | BUG_ON(!con->out_kvec_left); | |
802 | con->out_kvec_bytes -= skip; | |
803 | con->out_kvec_left--; | |
804 | } | |
805 | ||
806 | return skip; | |
807 | } | |
808 | ||
df6ad1f9 | 809 | #ifdef CONFIG_BLOCK |
6aaa4511 AE |
810 | |
811 | /* | |
812 | * For a bio data item, a piece is whatever remains of the next | |
813 | * entry in the current bio iovec, or the first entry in the next | |
814 | * bio in the list. | |
815 | */ | |
8ae4f4f5 | 816 | static void ceph_msg_data_bio_cursor_init(struct ceph_msg_data_cursor *cursor, |
25aff7c5 | 817 | size_t length) |
6aaa4511 | 818 | { |
8ae4f4f5 | 819 | struct ceph_msg_data *data = cursor->data; |
6aaa4511 AE |
820 | struct bio *bio; |
821 | ||
822 | BUG_ON(data->type != CEPH_MSG_DATA_BIO); | |
823 | ||
824 | bio = data->bio; | |
825 | BUG_ON(!bio); | |
6aaa4511 | 826 | |
ca8b3a69 | 827 | cursor->resid = min(length, data->bio_length); |
6aaa4511 | 828 | cursor->bio = bio; |
f38a5181 KO |
829 | cursor->bvec_iter = bio->bi_iter; |
830 | cursor->last_piece = | |
831 | cursor->resid <= bio_iter_len(bio, cursor->bvec_iter); | |
6aaa4511 AE |
832 | } |
833 | ||
8ae4f4f5 | 834 | static struct page *ceph_msg_data_bio_next(struct ceph_msg_data_cursor *cursor, |
6aaa4511 AE |
835 | size_t *page_offset, |
836 | size_t *length) | |
837 | { | |
8ae4f4f5 | 838 | struct ceph_msg_data *data = cursor->data; |
6aaa4511 | 839 | struct bio *bio; |
f38a5181 | 840 | struct bio_vec bio_vec; |
6aaa4511 AE |
841 | |
842 | BUG_ON(data->type != CEPH_MSG_DATA_BIO); | |
843 | ||
844 | bio = cursor->bio; | |
845 | BUG_ON(!bio); | |
846 | ||
f38a5181 | 847 | bio_vec = bio_iter_iovec(bio, cursor->bvec_iter); |
6aaa4511 | 848 | |
f38a5181 | 849 | *page_offset = (size_t) bio_vec.bv_offset; |
6aaa4511 | 850 | BUG_ON(*page_offset >= PAGE_SIZE); |
25aff7c5 AE |
851 | if (cursor->last_piece) /* pagelist offset is always 0 */ |
852 | *length = cursor->resid; | |
853 | else | |
f38a5181 | 854 | *length = (size_t) bio_vec.bv_len; |
25aff7c5 | 855 | BUG_ON(*length > cursor->resid); |
5df521b1 | 856 | BUG_ON(*page_offset + *length > PAGE_SIZE); |
6aaa4511 | 857 | |
f38a5181 | 858 | return bio_vec.bv_page; |
6aaa4511 AE |
859 | } |
860 | ||
8ae4f4f5 AE |
861 | static bool ceph_msg_data_bio_advance(struct ceph_msg_data_cursor *cursor, |
862 | size_t bytes) | |
6aaa4511 | 863 | { |
6aaa4511 | 864 | struct bio *bio; |
f38a5181 | 865 | struct bio_vec bio_vec; |
6aaa4511 | 866 | |
8ae4f4f5 | 867 | BUG_ON(cursor->data->type != CEPH_MSG_DATA_BIO); |
6aaa4511 AE |
868 | |
869 | bio = cursor->bio; | |
870 | BUG_ON(!bio); | |
871 | ||
f38a5181 | 872 | bio_vec = bio_iter_iovec(bio, cursor->bvec_iter); |
6aaa4511 AE |
873 | |
874 | /* Advance the cursor offset */ | |
875 | ||
25aff7c5 AE |
876 | BUG_ON(cursor->resid < bytes); |
877 | cursor->resid -= bytes; | |
f38a5181 KO |
878 | |
879 | bio_advance_iter(bio, &cursor->bvec_iter, bytes); | |
880 | ||
881 | if (bytes < bio_vec.bv_len) | |
6aaa4511 AE |
882 | return false; /* more bytes to process in this segment */ |
883 | ||
884 | /* Move on to the next segment, and possibly the next bio */ | |
885 | ||
f38a5181 | 886 | if (!cursor->bvec_iter.bi_size) { |
6aaa4511 | 887 | bio = bio->bi_next; |
0ec1d15e ID |
888 | cursor->bio = bio; |
889 | if (bio) | |
890 | cursor->bvec_iter = bio->bi_iter; | |
891 | else | |
892 | memset(&cursor->bvec_iter, 0, | |
893 | sizeof(cursor->bvec_iter)); | |
6aaa4511 | 894 | } |
6aaa4511 | 895 | |
25aff7c5 AE |
896 | if (!cursor->last_piece) { |
897 | BUG_ON(!cursor->resid); | |
898 | BUG_ON(!bio); | |
899 | /* A short read is OK, so use <= rather than == */ | |
f38a5181 | 900 | if (cursor->resid <= bio_iter_len(bio, cursor->bvec_iter)) |
6aaa4511 | 901 | cursor->last_piece = true; |
25aff7c5 | 902 | } |
6aaa4511 AE |
903 | |
904 | return true; | |
905 | } | |
ea96571f | 906 | #endif /* CONFIG_BLOCK */ |
df6ad1f9 | 907 | |
e766d7b5 AE |
908 | /* |
909 | * For a page array, a piece comes from the first page in the array | |
910 | * that has not already been fully consumed. | |
911 | */ | |
8ae4f4f5 | 912 | static void ceph_msg_data_pages_cursor_init(struct ceph_msg_data_cursor *cursor, |
25aff7c5 | 913 | size_t length) |
e766d7b5 | 914 | { |
8ae4f4f5 | 915 | struct ceph_msg_data *data = cursor->data; |
e766d7b5 AE |
916 | int page_count; |
917 | ||
918 | BUG_ON(data->type != CEPH_MSG_DATA_PAGES); | |
919 | ||
920 | BUG_ON(!data->pages); | |
921 | BUG_ON(!data->length); | |
922 | ||
ca8b3a69 | 923 | cursor->resid = min(length, data->length); |
e766d7b5 | 924 | page_count = calc_pages_for(data->alignment, (u64)data->length); |
e766d7b5 AE |
925 | cursor->page_offset = data->alignment & ~PAGE_MASK; |
926 | cursor->page_index = 0; | |
56fc5659 AE |
927 | BUG_ON(page_count > (int)USHRT_MAX); |
928 | cursor->page_count = (unsigned short)page_count; | |
929 | BUG_ON(length > SIZE_MAX - cursor->page_offset); | |
5f740d7e | 930 | cursor->last_piece = cursor->page_offset + cursor->resid <= PAGE_SIZE; |
e766d7b5 AE |
931 | } |
932 | ||
8ae4f4f5 AE |
933 | static struct page * |
934 | ceph_msg_data_pages_next(struct ceph_msg_data_cursor *cursor, | |
935 | size_t *page_offset, size_t *length) | |
e766d7b5 | 936 | { |
8ae4f4f5 | 937 | struct ceph_msg_data *data = cursor->data; |
e766d7b5 AE |
938 | |
939 | BUG_ON(data->type != CEPH_MSG_DATA_PAGES); | |
940 | ||
941 | BUG_ON(cursor->page_index >= cursor->page_count); | |
942 | BUG_ON(cursor->page_offset >= PAGE_SIZE); | |
e766d7b5 AE |
943 | |
944 | *page_offset = cursor->page_offset; | |
25aff7c5 | 945 | if (cursor->last_piece) |
e766d7b5 | 946 | *length = cursor->resid; |
25aff7c5 | 947 | else |
e766d7b5 | 948 | *length = PAGE_SIZE - *page_offset; |
e766d7b5 AE |
949 | |
950 | return data->pages[cursor->page_index]; | |
951 | } | |
952 | ||
8ae4f4f5 | 953 | static bool ceph_msg_data_pages_advance(struct ceph_msg_data_cursor *cursor, |
e766d7b5 AE |
954 | size_t bytes) |
955 | { | |
8ae4f4f5 | 956 | BUG_ON(cursor->data->type != CEPH_MSG_DATA_PAGES); |
e766d7b5 AE |
957 | |
958 | BUG_ON(cursor->page_offset + bytes > PAGE_SIZE); | |
e766d7b5 AE |
959 | |
960 | /* Advance the cursor page offset */ | |
961 | ||
962 | cursor->resid -= bytes; | |
5df521b1 AE |
963 | cursor->page_offset = (cursor->page_offset + bytes) & ~PAGE_MASK; |
964 | if (!bytes || cursor->page_offset) | |
e766d7b5 AE |
965 | return false; /* more bytes to process in the current page */ |
966 | ||
d90deda6 YZ |
967 | if (!cursor->resid) |
968 | return false; /* no more data */ | |
969 | ||
5df521b1 | 970 | /* Move on to the next page; offset is already at 0 */ |
e766d7b5 AE |
971 | |
972 | BUG_ON(cursor->page_index >= cursor->page_count); | |
e766d7b5 | 973 | cursor->page_index++; |
25aff7c5 | 974 | cursor->last_piece = cursor->resid <= PAGE_SIZE; |
e766d7b5 AE |
975 | |
976 | return true; | |
977 | } | |
978 | ||
fe38a2b6 | 979 | /* |
dd236fcb AE |
980 | * For a pagelist, a piece is whatever remains to be consumed in the |
981 | * first page in the list, or the front of the next page. | |
fe38a2b6 | 982 | */ |
8ae4f4f5 AE |
983 | static void |
984 | ceph_msg_data_pagelist_cursor_init(struct ceph_msg_data_cursor *cursor, | |
25aff7c5 | 985 | size_t length) |
fe38a2b6 | 986 | { |
8ae4f4f5 | 987 | struct ceph_msg_data *data = cursor->data; |
fe38a2b6 AE |
988 | struct ceph_pagelist *pagelist; |
989 | struct page *page; | |
990 | ||
dd236fcb | 991 | BUG_ON(data->type != CEPH_MSG_DATA_PAGELIST); |
fe38a2b6 AE |
992 | |
993 | pagelist = data->pagelist; | |
994 | BUG_ON(!pagelist); | |
25aff7c5 AE |
995 | |
996 | if (!length) | |
fe38a2b6 AE |
997 | return; /* pagelist can be assigned but empty */ |
998 | ||
999 | BUG_ON(list_empty(&pagelist->head)); | |
1000 | page = list_first_entry(&pagelist->head, struct page, lru); | |
1001 | ||
ca8b3a69 | 1002 | cursor->resid = min(length, pagelist->length); |
fe38a2b6 AE |
1003 | cursor->page = page; |
1004 | cursor->offset = 0; | |
a51b272e | 1005 | cursor->last_piece = cursor->resid <= PAGE_SIZE; |
fe38a2b6 AE |
1006 | } |
1007 | ||
8ae4f4f5 AE |
1008 | static struct page * |
1009 | ceph_msg_data_pagelist_next(struct ceph_msg_data_cursor *cursor, | |
1010 | size_t *page_offset, size_t *length) | |
fe38a2b6 | 1011 | { |
8ae4f4f5 | 1012 | struct ceph_msg_data *data = cursor->data; |
fe38a2b6 | 1013 | struct ceph_pagelist *pagelist; |
fe38a2b6 AE |
1014 | |
1015 | BUG_ON(data->type != CEPH_MSG_DATA_PAGELIST); | |
1016 | ||
1017 | pagelist = data->pagelist; | |
1018 | BUG_ON(!pagelist); | |
1019 | ||
1020 | BUG_ON(!cursor->page); | |
25aff7c5 | 1021 | BUG_ON(cursor->offset + cursor->resid != pagelist->length); |
fe38a2b6 | 1022 | |
5df521b1 | 1023 | /* offset of first page in pagelist is always 0 */ |
fe38a2b6 | 1024 | *page_offset = cursor->offset & ~PAGE_MASK; |
5df521b1 | 1025 | if (cursor->last_piece) |
25aff7c5 AE |
1026 | *length = cursor->resid; |
1027 | else | |
1028 | *length = PAGE_SIZE - *page_offset; | |
fe38a2b6 | 1029 | |
8ae4f4f5 | 1030 | return cursor->page; |
fe38a2b6 AE |
1031 | } |
1032 | ||
8ae4f4f5 | 1033 | static bool ceph_msg_data_pagelist_advance(struct ceph_msg_data_cursor *cursor, |
dd236fcb | 1034 | size_t bytes) |
fe38a2b6 | 1035 | { |
8ae4f4f5 | 1036 | struct ceph_msg_data *data = cursor->data; |
fe38a2b6 AE |
1037 | struct ceph_pagelist *pagelist; |
1038 | ||
1039 | BUG_ON(data->type != CEPH_MSG_DATA_PAGELIST); | |
1040 | ||
1041 | pagelist = data->pagelist; | |
1042 | BUG_ON(!pagelist); | |
25aff7c5 AE |
1043 | |
1044 | BUG_ON(cursor->offset + cursor->resid != pagelist->length); | |
fe38a2b6 AE |
1045 | BUG_ON((cursor->offset & ~PAGE_MASK) + bytes > PAGE_SIZE); |
1046 | ||
1047 | /* Advance the cursor offset */ | |
1048 | ||
25aff7c5 | 1049 | cursor->resid -= bytes; |
fe38a2b6 | 1050 | cursor->offset += bytes; |
5df521b1 | 1051 | /* offset of first page in pagelist is always 0 */ |
fe38a2b6 AE |
1052 | if (!bytes || cursor->offset & ~PAGE_MASK) |
1053 | return false; /* more bytes to process in the current page */ | |
1054 | ||
d90deda6 YZ |
1055 | if (!cursor->resid) |
1056 | return false; /* no more data */ | |
1057 | ||
fe38a2b6 AE |
1058 | /* Move on to the next page */ |
1059 | ||
1060 | BUG_ON(list_is_last(&cursor->page->lru, &pagelist->head)); | |
17ddc49b | 1061 | cursor->page = list_next_entry(cursor->page, lru); |
25aff7c5 | 1062 | cursor->last_piece = cursor->resid <= PAGE_SIZE; |
fe38a2b6 AE |
1063 | |
1064 | return true; | |
1065 | } | |
1066 | ||
dd236fcb AE |
1067 | /* |
1068 | * Message data is handled (sent or received) in pieces, where each | |
1069 | * piece resides on a single page. The network layer might not | |
1070 | * consume an entire piece at once. A data item's cursor keeps | |
1071 | * track of which piece is next to process and how much remains to | |
1072 | * be processed in that piece. It also tracks whether the current | |
1073 | * piece is the last one in the data item. | |
1074 | */ | |
ca8b3a69 | 1075 | static void __ceph_msg_data_cursor_init(struct ceph_msg_data_cursor *cursor) |
dd236fcb | 1076 | { |
ca8b3a69 | 1077 | size_t length = cursor->total_resid; |
8ae4f4f5 | 1078 | |
8ae4f4f5 | 1079 | switch (cursor->data->type) { |
dd236fcb | 1080 | case CEPH_MSG_DATA_PAGELIST: |
8ae4f4f5 | 1081 | ceph_msg_data_pagelist_cursor_init(cursor, length); |
dd236fcb | 1082 | break; |
e766d7b5 | 1083 | case CEPH_MSG_DATA_PAGES: |
8ae4f4f5 | 1084 | ceph_msg_data_pages_cursor_init(cursor, length); |
e766d7b5 | 1085 | break; |
dd236fcb AE |
1086 | #ifdef CONFIG_BLOCK |
1087 | case CEPH_MSG_DATA_BIO: | |
8ae4f4f5 | 1088 | ceph_msg_data_bio_cursor_init(cursor, length); |
6aaa4511 | 1089 | break; |
dd236fcb | 1090 | #endif /* CONFIG_BLOCK */ |
6aaa4511 | 1091 | case CEPH_MSG_DATA_NONE: |
dd236fcb AE |
1092 | default: |
1093 | /* BUG(); */ | |
1094 | break; | |
1095 | } | |
8ae4f4f5 | 1096 | cursor->need_crc = true; |
dd236fcb AE |
1097 | } |
1098 | ||
ca8b3a69 AE |
1099 | static void ceph_msg_data_cursor_init(struct ceph_msg *msg, size_t length) |
1100 | { | |
1101 | struct ceph_msg_data_cursor *cursor = &msg->cursor; | |
1102 | struct ceph_msg_data *data; | |
1103 | ||
1104 | BUG_ON(!length); | |
1105 | BUG_ON(length > msg->data_length); | |
1106 | BUG_ON(list_empty(&msg->data)); | |
1107 | ||
ca8b3a69 AE |
1108 | cursor->data_head = &msg->data; |
1109 | cursor->total_resid = length; | |
1110 | data = list_first_entry(&msg->data, struct ceph_msg_data, links); | |
1111 | cursor->data = data; | |
1112 | ||
1113 | __ceph_msg_data_cursor_init(cursor); | |
1114 | } | |
1115 | ||
dd236fcb AE |
1116 | /* |
1117 | * Return the page containing the next piece to process for a given | |
1118 | * data item, and supply the page offset and length of that piece. | |
1119 | * Indicate whether this is the last piece in this data item. | |
1120 | */ | |
8ae4f4f5 AE |
1121 | static struct page *ceph_msg_data_next(struct ceph_msg_data_cursor *cursor, |
1122 | size_t *page_offset, size_t *length, | |
dd236fcb AE |
1123 | bool *last_piece) |
1124 | { | |
1125 | struct page *page; | |
1126 | ||
8ae4f4f5 | 1127 | switch (cursor->data->type) { |
dd236fcb | 1128 | case CEPH_MSG_DATA_PAGELIST: |
8ae4f4f5 | 1129 | page = ceph_msg_data_pagelist_next(cursor, page_offset, length); |
dd236fcb | 1130 | break; |
e766d7b5 | 1131 | case CEPH_MSG_DATA_PAGES: |
8ae4f4f5 | 1132 | page = ceph_msg_data_pages_next(cursor, page_offset, length); |
e766d7b5 | 1133 | break; |
dd236fcb AE |
1134 | #ifdef CONFIG_BLOCK |
1135 | case CEPH_MSG_DATA_BIO: | |
8ae4f4f5 | 1136 | page = ceph_msg_data_bio_next(cursor, page_offset, length); |
6aaa4511 | 1137 | break; |
dd236fcb | 1138 | #endif /* CONFIG_BLOCK */ |
6aaa4511 | 1139 | case CEPH_MSG_DATA_NONE: |
dd236fcb AE |
1140 | default: |
1141 | page = NULL; | |
1142 | break; | |
1143 | } | |
1144 | BUG_ON(!page); | |
1145 | BUG_ON(*page_offset + *length > PAGE_SIZE); | |
1146 | BUG_ON(!*length); | |
1147 | if (last_piece) | |
8ae4f4f5 | 1148 | *last_piece = cursor->last_piece; |
dd236fcb AE |
1149 | |
1150 | return page; | |
1151 | } | |
1152 | ||
1153 | /* | |
1154 | * Returns true if the result moves the cursor on to the next piece | |
1155 | * of the data item. | |
1156 | */ | |
8ae4f4f5 AE |
1157 | static bool ceph_msg_data_advance(struct ceph_msg_data_cursor *cursor, |
1158 | size_t bytes) | |
dd236fcb AE |
1159 | { |
1160 | bool new_piece; | |
1161 | ||
25aff7c5 | 1162 | BUG_ON(bytes > cursor->resid); |
8ae4f4f5 | 1163 | switch (cursor->data->type) { |
dd236fcb | 1164 | case CEPH_MSG_DATA_PAGELIST: |
8ae4f4f5 | 1165 | new_piece = ceph_msg_data_pagelist_advance(cursor, bytes); |
dd236fcb | 1166 | break; |
e766d7b5 | 1167 | case CEPH_MSG_DATA_PAGES: |
8ae4f4f5 | 1168 | new_piece = ceph_msg_data_pages_advance(cursor, bytes); |
e766d7b5 | 1169 | break; |
dd236fcb AE |
1170 | #ifdef CONFIG_BLOCK |
1171 | case CEPH_MSG_DATA_BIO: | |
8ae4f4f5 | 1172 | new_piece = ceph_msg_data_bio_advance(cursor, bytes); |
6aaa4511 | 1173 | break; |
dd236fcb | 1174 | #endif /* CONFIG_BLOCK */ |
6aaa4511 | 1175 | case CEPH_MSG_DATA_NONE: |
dd236fcb AE |
1176 | default: |
1177 | BUG(); | |
1178 | break; | |
1179 | } | |
ca8b3a69 | 1180 | cursor->total_resid -= bytes; |
dd236fcb | 1181 | |
ca8b3a69 AE |
1182 | if (!cursor->resid && cursor->total_resid) { |
1183 | WARN_ON(!cursor->last_piece); | |
1184 | BUG_ON(list_is_last(&cursor->data->links, cursor->data_head)); | |
17ddc49b | 1185 | cursor->data = list_next_entry(cursor->data, links); |
ca8b3a69 | 1186 | __ceph_msg_data_cursor_init(cursor); |
a51b272e | 1187 | new_piece = true; |
ca8b3a69 | 1188 | } |
a51b272e | 1189 | cursor->need_crc = new_piece; |
ca8b3a69 | 1190 | |
dd236fcb AE |
1191 | return new_piece; |
1192 | } | |
1193 | ||
dbc0d3ca ID |
1194 | static size_t sizeof_footer(struct ceph_connection *con) |
1195 | { | |
1196 | return (con->peer_features & CEPH_FEATURE_MSG_AUTH) ? | |
1197 | sizeof(struct ceph_msg_footer) : | |
1198 | sizeof(struct ceph_msg_footer_old); | |
1199 | } | |
1200 | ||
98fa5dd8 | 1201 | static void prepare_message_data(struct ceph_msg *msg, u32 data_len) |
739c905b | 1202 | { |
739c905b | 1203 | BUG_ON(!msg); |
25aff7c5 | 1204 | BUG_ON(!data_len); |
739c905b | 1205 | |
4c59b4a2 | 1206 | /* Initialize data cursor */ |
fe38a2b6 | 1207 | |
8ae4f4f5 | 1208 | ceph_msg_data_cursor_init(msg, (size_t)data_len); |
739c905b AE |
1209 | } |
1210 | ||
31b8006e SW |
1211 | /* |
1212 | * Prepare footer for currently outgoing message, and finish things | |
1213 | * off. Assumes out_kvec* are already valid.. we just add on to the end. | |
1214 | */ | |
859eb799 | 1215 | static void prepare_write_message_footer(struct ceph_connection *con) |
31b8006e SW |
1216 | { |
1217 | struct ceph_msg *m = con->out_msg; | |
1218 | ||
fd154f3c AE |
1219 | m->footer.flags |= CEPH_MSG_FOOTER_COMPLETE; |
1220 | ||
31b8006e | 1221 | dout("prepare_write_message_footer %p\n", con); |
89f08173 | 1222 | con_out_kvec_add(con, sizeof_footer(con), &m->footer); |
33d07337 YZ |
1223 | if (con->peer_features & CEPH_FEATURE_MSG_AUTH) { |
1224 | if (con->ops->sign_message) | |
79dbd1ba | 1225 | con->ops->sign_message(m); |
33d07337 YZ |
1226 | else |
1227 | m->footer.sig = 0; | |
33d07337 YZ |
1228 | } else { |
1229 | m->old_footer.flags = m->footer.flags; | |
33d07337 | 1230 | } |
31b8006e | 1231 | con->out_more = m->more_to_follow; |
c86a2930 | 1232 | con->out_msg_done = true; |
31b8006e SW |
1233 | } |
1234 | ||
1235 | /* | |
1236 | * Prepare headers for the next outgoing message. | |
1237 | */ | |
1238 | static void prepare_write_message(struct ceph_connection *con) | |
1239 | { | |
1240 | struct ceph_msg *m; | |
a9a0c51a | 1241 | u32 crc; |
31b8006e | 1242 | |
e2200423 | 1243 | con_out_kvec_reset(con); |
c86a2930 | 1244 | con->out_msg_done = false; |
31b8006e SW |
1245 | |
1246 | /* Sneak an ack in there first? If we can get it into the same | |
1247 | * TCP packet that's a good thing. */ | |
1248 | if (con->in_seq > con->in_seq_acked) { | |
1249 | con->in_seq_acked = con->in_seq; | |
e2200423 | 1250 | con_out_kvec_add(con, sizeof (tag_ack), &tag_ack); |
31b8006e | 1251 | con->out_temp_ack = cpu_to_le64(con->in_seq_acked); |
e2200423 | 1252 | con_out_kvec_add(con, sizeof (con->out_temp_ack), |
859eb799 | 1253 | &con->out_temp_ack); |
31b8006e SW |
1254 | } |
1255 | ||
38941f80 | 1256 | BUG_ON(list_empty(&con->out_queue)); |
859eb799 | 1257 | m = list_first_entry(&con->out_queue, struct ceph_msg, list_head); |
c86a2930 | 1258 | con->out_msg = m; |
38941f80 | 1259 | BUG_ON(m->con != con); |
4cf9d544 SW |
1260 | |
1261 | /* put message on sent list */ | |
1262 | ceph_msg_get(m); | |
1263 | list_move_tail(&m->list_head, &con->out_sent); | |
31b8006e | 1264 | |
e84346b7 SW |
1265 | /* |
1266 | * only assign outgoing seq # if we haven't sent this message | |
1267 | * yet. if it is requeued, resend with it's original seq. | |
1268 | */ | |
1269 | if (m->needs_out_seq) { | |
1270 | m->hdr.seq = cpu_to_le64(++con->out_seq); | |
1271 | m->needs_out_seq = false; | |
1272 | } | |
98fa5dd8 | 1273 | WARN_ON(m->data_length != le32_to_cpu(m->hdr.data_len)); |
31b8006e | 1274 | |
98fa5dd8 | 1275 | dout("prepare_write_message %p seq %lld type %d len %d+%d+%zd\n", |
31b8006e SW |
1276 | m, con->out_seq, le16_to_cpu(m->hdr.type), |
1277 | le32_to_cpu(m->hdr.front_len), le32_to_cpu(m->hdr.middle_len), | |
98fa5dd8 | 1278 | m->data_length); |
31b8006e SW |
1279 | BUG_ON(le32_to_cpu(m->hdr.front_len) != m->front.iov_len); |
1280 | ||
1281 | /* tag + hdr + front + middle */ | |
e2200423 | 1282 | con_out_kvec_add(con, sizeof (tag_msg), &tag_msg); |
67645d76 | 1283 | con_out_kvec_add(con, sizeof(con->out_hdr), &con->out_hdr); |
e2200423 | 1284 | con_out_kvec_add(con, m->front.iov_len, m->front.iov_base); |
859eb799 | 1285 | |
31b8006e | 1286 | if (m->middle) |
e2200423 | 1287 | con_out_kvec_add(con, m->middle->vec.iov_len, |
859eb799 | 1288 | m->middle->vec.iov_base); |
31b8006e | 1289 | |
67645d76 | 1290 | /* fill in hdr crc and finalize hdr */ |
a9a0c51a AE |
1291 | crc = crc32c(0, &m->hdr, offsetof(struct ceph_msg_header, crc)); |
1292 | con->out_msg->hdr.crc = cpu_to_le32(crc); | |
67645d76 | 1293 | memcpy(&con->out_hdr, &con->out_msg->hdr, sizeof(con->out_hdr)); |
a9a0c51a | 1294 | |
67645d76 | 1295 | /* fill in front and middle crc, footer */ |
a9a0c51a AE |
1296 | crc = crc32c(0, m->front.iov_base, m->front.iov_len); |
1297 | con->out_msg->footer.front_crc = cpu_to_le32(crc); | |
1298 | if (m->middle) { | |
1299 | crc = crc32c(0, m->middle->vec.iov_base, | |
1300 | m->middle->vec.iov_len); | |
1301 | con->out_msg->footer.middle_crc = cpu_to_le32(crc); | |
1302 | } else | |
31b8006e | 1303 | con->out_msg->footer.middle_crc = 0; |
739c905b | 1304 | dout("%s front_crc %u middle_crc %u\n", __func__, |
31b8006e SW |
1305 | le32_to_cpu(con->out_msg->footer.front_crc), |
1306 | le32_to_cpu(con->out_msg->footer.middle_crc)); | |
67645d76 | 1307 | con->out_msg->footer.flags = 0; |
31b8006e SW |
1308 | |
1309 | /* is there a data payload? */ | |
739c905b | 1310 | con->out_msg->footer.data_crc = 0; |
98fa5dd8 AE |
1311 | if (m->data_length) { |
1312 | prepare_message_data(con->out_msg, m->data_length); | |
78625051 AE |
1313 | con->out_more = 1; /* data + footer will follow */ |
1314 | } else { | |
31b8006e | 1315 | /* no, queue up footer too and be done */ |
859eb799 | 1316 | prepare_write_message_footer(con); |
78625051 | 1317 | } |
31b8006e | 1318 | |
c9ffc77a | 1319 | con_flag_set(con, CON_FLAG_WRITE_PENDING); |
31b8006e SW |
1320 | } |
1321 | ||
1322 | /* | |
1323 | * Prepare an ack. | |
1324 | */ | |
1325 | static void prepare_write_ack(struct ceph_connection *con) | |
1326 | { | |
1327 | dout("prepare_write_ack %p %llu -> %llu\n", con, | |
1328 | con->in_seq_acked, con->in_seq); | |
1329 | con->in_seq_acked = con->in_seq; | |
1330 | ||
e2200423 | 1331 | con_out_kvec_reset(con); |
859eb799 | 1332 | |
e2200423 | 1333 | con_out_kvec_add(con, sizeof (tag_ack), &tag_ack); |
859eb799 | 1334 | |
31b8006e | 1335 | con->out_temp_ack = cpu_to_le64(con->in_seq_acked); |
e2200423 | 1336 | con_out_kvec_add(con, sizeof (con->out_temp_ack), |
859eb799 AE |
1337 | &con->out_temp_ack); |
1338 | ||
31b8006e | 1339 | con->out_more = 1; /* more will follow.. eventually.. */ |
c9ffc77a | 1340 | con_flag_set(con, CON_FLAG_WRITE_PENDING); |
31b8006e SW |
1341 | } |
1342 | ||
3a23083b SW |
1343 | /* |
1344 | * Prepare to share the seq during handshake | |
1345 | */ | |
1346 | static void prepare_write_seq(struct ceph_connection *con) | |
1347 | { | |
1348 | dout("prepare_write_seq %p %llu -> %llu\n", con, | |
1349 | con->in_seq_acked, con->in_seq); | |
1350 | con->in_seq_acked = con->in_seq; | |
1351 | ||
1352 | con_out_kvec_reset(con); | |
1353 | ||
1354 | con->out_temp_ack = cpu_to_le64(con->in_seq_acked); | |
1355 | con_out_kvec_add(con, sizeof (con->out_temp_ack), | |
1356 | &con->out_temp_ack); | |
1357 | ||
1358 | con_flag_set(con, CON_FLAG_WRITE_PENDING); | |
1359 | } | |
1360 | ||
31b8006e SW |
1361 | /* |
1362 | * Prepare to write keepalive byte. | |
1363 | */ | |
1364 | static void prepare_write_keepalive(struct ceph_connection *con) | |
1365 | { | |
1366 | dout("prepare_write_keepalive %p\n", con); | |
e2200423 | 1367 | con_out_kvec_reset(con); |
8b9558aa | 1368 | if (con->peer_features & CEPH_FEATURE_MSGR_KEEPALIVE2) { |
7f61f545 ID |
1369 | struct timespec now = CURRENT_TIME; |
1370 | ||
8b9558aa | 1371 | con_out_kvec_add(con, sizeof(tag_keepalive2), &tag_keepalive2); |
7f61f545 ID |
1372 | ceph_encode_timespec(&con->out_temp_keepalive2, &now); |
1373 | con_out_kvec_add(con, sizeof(con->out_temp_keepalive2), | |
1374 | &con->out_temp_keepalive2); | |
8b9558aa YZ |
1375 | } else { |
1376 | con_out_kvec_add(con, sizeof(tag_keepalive), &tag_keepalive); | |
1377 | } | |
c9ffc77a | 1378 | con_flag_set(con, CON_FLAG_WRITE_PENDING); |
31b8006e SW |
1379 | } |
1380 | ||
1381 | /* | |
1382 | * Connection negotiation. | |
1383 | */ | |
1384 | ||
dac1e716 AE |
1385 | static struct ceph_auth_handshake *get_connect_authorizer(struct ceph_connection *con, |
1386 | int *auth_proto) | |
4e7a5dcd | 1387 | { |
a3530df3 | 1388 | struct ceph_auth_handshake *auth; |
b1c6b980 AE |
1389 | |
1390 | if (!con->ops->get_authorizer) { | |
1391 | con->out_connect.authorizer_protocol = CEPH_AUTH_UNKNOWN; | |
1392 | con->out_connect.authorizer_len = 0; | |
729796be | 1393 | return NULL; |
b1c6b980 AE |
1394 | } |
1395 | ||
1396 | /* Can't hold the mutex while getting authorizer */ | |
ec302645 | 1397 | mutex_unlock(&con->mutex); |
dac1e716 | 1398 | auth = con->ops->get_authorizer(con, auth_proto, con->auth_retry); |
ec302645 | 1399 | mutex_lock(&con->mutex); |
4e7a5dcd | 1400 | |
a3530df3 | 1401 | if (IS_ERR(auth)) |
729796be | 1402 | return auth; |
8dacc7da | 1403 | if (con->state != CON_STATE_NEGOTIATING) |
729796be | 1404 | return ERR_PTR(-EAGAIN); |
0da5d703 | 1405 | |
8f43fb53 AE |
1406 | con->auth_reply_buf = auth->authorizer_reply_buf; |
1407 | con->auth_reply_buf_len = auth->authorizer_reply_buf_len; | |
729796be | 1408 | return auth; |
4e7a5dcd SW |
1409 | } |
1410 | ||
31b8006e SW |
1411 | /* |
1412 | * We connected to a peer and are saying hello. | |
1413 | */ | |
e825a66d | 1414 | static void prepare_write_banner(struct ceph_connection *con) |
31b8006e | 1415 | { |
e2200423 AE |
1416 | con_out_kvec_add(con, strlen(CEPH_BANNER), CEPH_BANNER); |
1417 | con_out_kvec_add(con, sizeof (con->msgr->my_enc_addr), | |
e825a66d | 1418 | &con->msgr->my_enc_addr); |
eed0ef2c | 1419 | |
eed0ef2c | 1420 | con->out_more = 0; |
c9ffc77a | 1421 | con_flag_set(con, CON_FLAG_WRITE_PENDING); |
eed0ef2c SW |
1422 | } |
1423 | ||
e825a66d | 1424 | static int prepare_write_connect(struct ceph_connection *con) |
eed0ef2c | 1425 | { |
95c96174 | 1426 | unsigned int global_seq = get_global_seq(con->msgr, 0); |
31b8006e | 1427 | int proto; |
dac1e716 | 1428 | int auth_proto; |
729796be | 1429 | struct ceph_auth_handshake *auth; |
31b8006e SW |
1430 | |
1431 | switch (con->peer_name.type) { | |
1432 | case CEPH_ENTITY_TYPE_MON: | |
1433 | proto = CEPH_MONC_PROTOCOL; | |
1434 | break; | |
1435 | case CEPH_ENTITY_TYPE_OSD: | |
1436 | proto = CEPH_OSDC_PROTOCOL; | |
1437 | break; | |
1438 | case CEPH_ENTITY_TYPE_MDS: | |
1439 | proto = CEPH_MDSC_PROTOCOL; | |
1440 | break; | |
1441 | default: | |
1442 | BUG(); | |
1443 | } | |
1444 | ||
1445 | dout("prepare_write_connect %p cseq=%d gseq=%d proto=%d\n", con, | |
1446 | con->connect_seq, global_seq, proto); | |
4e7a5dcd | 1447 | |
859bff51 ID |
1448 | con->out_connect.features = |
1449 | cpu_to_le64(from_msgr(con->msgr)->supported_features); | |
31b8006e SW |
1450 | con->out_connect.host_type = cpu_to_le32(CEPH_ENTITY_TYPE_CLIENT); |
1451 | con->out_connect.connect_seq = cpu_to_le32(con->connect_seq); | |
1452 | con->out_connect.global_seq = cpu_to_le32(global_seq); | |
1453 | con->out_connect.protocol_version = cpu_to_le32(proto); | |
1454 | con->out_connect.flags = 0; | |
31b8006e | 1455 | |
dac1e716 AE |
1456 | auth_proto = CEPH_AUTH_UNKNOWN; |
1457 | auth = get_connect_authorizer(con, &auth_proto); | |
729796be AE |
1458 | if (IS_ERR(auth)) |
1459 | return PTR_ERR(auth); | |
3da54776 | 1460 | |
dac1e716 | 1461 | con->out_connect.authorizer_protocol = cpu_to_le32(auth_proto); |
3da54776 AE |
1462 | con->out_connect.authorizer_len = auth ? |
1463 | cpu_to_le32(auth->authorizer_buf_len) : 0; | |
1464 | ||
e2200423 | 1465 | con_out_kvec_add(con, sizeof (con->out_connect), |
3da54776 AE |
1466 | &con->out_connect); |
1467 | if (auth && auth->authorizer_buf_len) | |
e2200423 | 1468 | con_out_kvec_add(con, auth->authorizer_buf_len, |
3da54776 | 1469 | auth->authorizer_buf); |
859eb799 | 1470 | |
31b8006e | 1471 | con->out_more = 0; |
c9ffc77a | 1472 | con_flag_set(con, CON_FLAG_WRITE_PENDING); |
4e7a5dcd | 1473 | |
e10c758e | 1474 | return 0; |
31b8006e SW |
1475 | } |
1476 | ||
31b8006e SW |
1477 | /* |
1478 | * write as much of pending kvecs to the socket as we can. | |
1479 | * 1 -> done | |
1480 | * 0 -> socket full, but more to do | |
1481 | * <0 -> error | |
1482 | */ | |
1483 | static int write_partial_kvec(struct ceph_connection *con) | |
1484 | { | |
1485 | int ret; | |
1486 | ||
1487 | dout("write_partial_kvec %p %d left\n", con, con->out_kvec_bytes); | |
1488 | while (con->out_kvec_bytes > 0) { | |
1489 | ret = ceph_tcp_sendmsg(con->sock, con->out_kvec_cur, | |
1490 | con->out_kvec_left, con->out_kvec_bytes, | |
1491 | con->out_more); | |
1492 | if (ret <= 0) | |
1493 | goto out; | |
1494 | con->out_kvec_bytes -= ret; | |
1495 | if (con->out_kvec_bytes == 0) | |
1496 | break; /* done */ | |
f42299e6 AE |
1497 | |
1498 | /* account for full iov entries consumed */ | |
1499 | while (ret >= con->out_kvec_cur->iov_len) { | |
1500 | BUG_ON(!con->out_kvec_left); | |
1501 | ret -= con->out_kvec_cur->iov_len; | |
1502 | con->out_kvec_cur++; | |
1503 | con->out_kvec_left--; | |
1504 | } | |
1505 | /* and for a partially-consumed entry */ | |
1506 | if (ret) { | |
1507 | con->out_kvec_cur->iov_len -= ret; | |
1508 | con->out_kvec_cur->iov_base += ret; | |
31b8006e SW |
1509 | } |
1510 | } | |
1511 | con->out_kvec_left = 0; | |
31b8006e SW |
1512 | ret = 1; |
1513 | out: | |
1514 | dout("write_partial_kvec %p %d left in %d kvecs ret = %d\n", con, | |
1515 | con->out_kvec_bytes, con->out_kvec_left, ret); | |
1516 | return ret; /* done! */ | |
1517 | } | |
1518 | ||
35b62808 AE |
1519 | static u32 ceph_crc32c_page(u32 crc, struct page *page, |
1520 | unsigned int page_offset, | |
1521 | unsigned int length) | |
1522 | { | |
1523 | char *kaddr; | |
1524 | ||
1525 | kaddr = kmap(page); | |
1526 | BUG_ON(kaddr == NULL); | |
1527 | crc = crc32c(crc, kaddr + page_offset, length); | |
1528 | kunmap(page); | |
1529 | ||
1530 | return crc; | |
1531 | } | |
31b8006e SW |
1532 | /* |
1533 | * Write as much message data payload as we can. If we finish, queue | |
1534 | * up the footer. | |
1535 | * 1 -> done, footer is now queued in out_kvec[]. | |
1536 | * 0 -> socket full, but more to do | |
1537 | * <0 -> error | |
1538 | */ | |
34d2d200 | 1539 | static int write_partial_message_data(struct ceph_connection *con) |
31b8006e SW |
1540 | { |
1541 | struct ceph_msg *msg = con->out_msg; | |
8ae4f4f5 | 1542 | struct ceph_msg_data_cursor *cursor = &msg->cursor; |
859bff51 | 1543 | bool do_datacrc = !ceph_test_opt(from_msgr(con->msgr), NOCRC); |
f5db90bc | 1544 | u32 crc; |
31b8006e | 1545 | |
859a35d5 | 1546 | dout("%s %p msg %p\n", __func__, con, msg); |
31b8006e | 1547 | |
5240d9f9 | 1548 | if (list_empty(&msg->data)) |
4c59b4a2 AE |
1549 | return -EINVAL; |
1550 | ||
5821bd8c AE |
1551 | /* |
1552 | * Iterate through each page that contains data to be | |
1553 | * written, and send as much as possible for each. | |
1554 | * | |
1555 | * If we are calculating the data crc (the default), we will | |
1556 | * need to map the page. If we have no pages, they have | |
1557 | * been revoked, so use the zero page. | |
1558 | */ | |
f5db90bc | 1559 | crc = do_datacrc ? le32_to_cpu(msg->footer.data_crc) : 0; |
643c68a4 | 1560 | while (cursor->resid) { |
8a166d05 | 1561 | struct page *page; |
e387d525 AE |
1562 | size_t page_offset; |
1563 | size_t length; | |
8a166d05 | 1564 | bool last_piece; |
8ea299bc | 1565 | bool need_crc; |
f5db90bc | 1566 | int ret; |
68b4476b | 1567 | |
343128ce SB |
1568 | page = ceph_msg_data_next(cursor, &page_offset, &length, |
1569 | &last_piece); | |
e387d525 | 1570 | ret = ceph_tcp_sendpage(con->sock, page, page_offset, |
c2cfa194 | 1571 | length, !last_piece); |
f5db90bc AE |
1572 | if (ret <= 0) { |
1573 | if (do_datacrc) | |
1574 | msg->footer.data_crc = cpu_to_le32(crc); | |
31b8006e | 1575 | |
f5db90bc AE |
1576 | return ret; |
1577 | } | |
143334ff AE |
1578 | if (do_datacrc && cursor->need_crc) |
1579 | crc = ceph_crc32c_page(crc, page, page_offset, length); | |
343128ce | 1580 | need_crc = ceph_msg_data_advance(cursor, (size_t)ret); |
31b8006e SW |
1581 | } |
1582 | ||
34d2d200 | 1583 | dout("%s %p msg %p done\n", __func__, con, msg); |
31b8006e SW |
1584 | |
1585 | /* prepare and queue up footer, too */ | |
f5db90bc AE |
1586 | if (do_datacrc) |
1587 | msg->footer.data_crc = cpu_to_le32(crc); | |
1588 | else | |
84ca8fc8 | 1589 | msg->footer.flags |= CEPH_MSG_FOOTER_NOCRC; |
e2200423 | 1590 | con_out_kvec_reset(con); |
859eb799 | 1591 | prepare_write_message_footer(con); |
f5db90bc AE |
1592 | |
1593 | return 1; /* must return > 0 to indicate success */ | |
31b8006e SW |
1594 | } |
1595 | ||
1596 | /* | |
1597 | * write some zeros | |
1598 | */ | |
1599 | static int write_partial_skip(struct ceph_connection *con) | |
1600 | { | |
1601 | int ret; | |
1602 | ||
67645d76 | 1603 | dout("%s %p %d left\n", __func__, con, con->out_skip); |
31b8006e | 1604 | while (con->out_skip > 0) { |
09cbfeaf | 1605 | size_t size = min(con->out_skip, (int) PAGE_SIZE); |
31b8006e | 1606 | |
e1dcb128 | 1607 | ret = ceph_tcp_sendpage(con->sock, zero_page, 0, size, true); |
31b8006e SW |
1608 | if (ret <= 0) |
1609 | goto out; | |
1610 | con->out_skip -= ret; | |
1611 | } | |
1612 | ret = 1; | |
1613 | out: | |
1614 | return ret; | |
1615 | } | |
1616 | ||
1617 | /* | |
1618 | * Prepare to read connection handshake, or an ack. | |
1619 | */ | |
eed0ef2c SW |
1620 | static void prepare_read_banner(struct ceph_connection *con) |
1621 | { | |
1622 | dout("prepare_read_banner %p\n", con); | |
1623 | con->in_base_pos = 0; | |
1624 | } | |
1625 | ||
31b8006e SW |
1626 | static void prepare_read_connect(struct ceph_connection *con) |
1627 | { | |
1628 | dout("prepare_read_connect %p\n", con); | |
1629 | con->in_base_pos = 0; | |
1630 | } | |
1631 | ||
1632 | static void prepare_read_ack(struct ceph_connection *con) | |
1633 | { | |
1634 | dout("prepare_read_ack %p\n", con); | |
1635 | con->in_base_pos = 0; | |
1636 | } | |
1637 | ||
3a23083b SW |
1638 | static void prepare_read_seq(struct ceph_connection *con) |
1639 | { | |
1640 | dout("prepare_read_seq %p\n", con); | |
1641 | con->in_base_pos = 0; | |
1642 | con->in_tag = CEPH_MSGR_TAG_SEQ; | |
1643 | } | |
1644 | ||
31b8006e SW |
1645 | static void prepare_read_tag(struct ceph_connection *con) |
1646 | { | |
1647 | dout("prepare_read_tag %p\n", con); | |
1648 | con->in_base_pos = 0; | |
1649 | con->in_tag = CEPH_MSGR_TAG_READY; | |
1650 | } | |
1651 | ||
8b9558aa YZ |
1652 | static void prepare_read_keepalive_ack(struct ceph_connection *con) |
1653 | { | |
1654 | dout("prepare_read_keepalive_ack %p\n", con); | |
1655 | con->in_base_pos = 0; | |
1656 | } | |
1657 | ||
31b8006e SW |
1658 | /* |
1659 | * Prepare to read a message. | |
1660 | */ | |
1661 | static int prepare_read_message(struct ceph_connection *con) | |
1662 | { | |
1663 | dout("prepare_read_message %p\n", con); | |
1664 | BUG_ON(con->in_msg != NULL); | |
1665 | con->in_base_pos = 0; | |
1666 | con->in_front_crc = con->in_middle_crc = con->in_data_crc = 0; | |
1667 | return 0; | |
1668 | } | |
1669 | ||
1670 | ||
1671 | static int read_partial(struct ceph_connection *con, | |
fd51653f | 1672 | int end, int size, void *object) |
31b8006e | 1673 | { |
e6cee71f AE |
1674 | while (con->in_base_pos < end) { |
1675 | int left = end - con->in_base_pos; | |
31b8006e SW |
1676 | int have = size - left; |
1677 | int ret = ceph_tcp_recvmsg(con->sock, object + have, left); | |
1678 | if (ret <= 0) | |
1679 | return ret; | |
1680 | con->in_base_pos += ret; | |
1681 | } | |
1682 | return 1; | |
1683 | } | |
1684 | ||
1685 | ||
1686 | /* | |
1687 | * Read all or part of the connect-side handshake on a new connection | |
1688 | */ | |
eed0ef2c | 1689 | static int read_partial_banner(struct ceph_connection *con) |
31b8006e | 1690 | { |
fd51653f AE |
1691 | int size; |
1692 | int end; | |
1693 | int ret; | |
31b8006e | 1694 | |
eed0ef2c | 1695 | dout("read_partial_banner %p at %d\n", con, con->in_base_pos); |
31b8006e SW |
1696 | |
1697 | /* peer's banner */ | |
fd51653f AE |
1698 | size = strlen(CEPH_BANNER); |
1699 | end = size; | |
1700 | ret = read_partial(con, end, size, con->in_banner); | |
31b8006e SW |
1701 | if (ret <= 0) |
1702 | goto out; | |
fd51653f AE |
1703 | |
1704 | size = sizeof (con->actual_peer_addr); | |
1705 | end += size; | |
1706 | ret = read_partial(con, end, size, &con->actual_peer_addr); | |
31b8006e SW |
1707 | if (ret <= 0) |
1708 | goto out; | |
fd51653f AE |
1709 | |
1710 | size = sizeof (con->peer_addr_for_me); | |
1711 | end += size; | |
1712 | ret = read_partial(con, end, size, &con->peer_addr_for_me); | |
31b8006e SW |
1713 | if (ret <= 0) |
1714 | goto out; | |
fd51653f | 1715 | |
eed0ef2c SW |
1716 | out: |
1717 | return ret; | |
1718 | } | |
1719 | ||
1720 | static int read_partial_connect(struct ceph_connection *con) | |
1721 | { | |
fd51653f AE |
1722 | int size; |
1723 | int end; | |
1724 | int ret; | |
eed0ef2c SW |
1725 | |
1726 | dout("read_partial_connect %p at %d\n", con, con->in_base_pos); | |
1727 | ||
fd51653f AE |
1728 | size = sizeof (con->in_reply); |
1729 | end = size; | |
1730 | ret = read_partial(con, end, size, &con->in_reply); | |
31b8006e SW |
1731 | if (ret <= 0) |
1732 | goto out; | |
fd51653f AE |
1733 | |
1734 | size = le32_to_cpu(con->in_reply.authorizer_len); | |
1735 | end += size; | |
1736 | ret = read_partial(con, end, size, con->auth_reply_buf); | |
4e7a5dcd SW |
1737 | if (ret <= 0) |
1738 | goto out; | |
31b8006e | 1739 | |
4e7a5dcd SW |
1740 | dout("read_partial_connect %p tag %d, con_seq = %u, g_seq = %u\n", |
1741 | con, (int)con->in_reply.tag, | |
1742 | le32_to_cpu(con->in_reply.connect_seq), | |
31b8006e SW |
1743 | le32_to_cpu(con->in_reply.global_seq)); |
1744 | out: | |
1745 | return ret; | |
eed0ef2c | 1746 | |
31b8006e SW |
1747 | } |
1748 | ||
1749 | /* | |
1750 | * Verify the hello banner looks okay. | |
1751 | */ | |
1752 | static int verify_hello(struct ceph_connection *con) | |
1753 | { | |
1754 | if (memcmp(con->in_banner, CEPH_BANNER, strlen(CEPH_BANNER))) { | |
13e38c8a | 1755 | pr_err("connect to %s got bad banner\n", |
3d14c5d2 | 1756 | ceph_pr_addr(&con->peer_addr.in_addr)); |
31b8006e SW |
1757 | con->error_msg = "protocol error, bad banner"; |
1758 | return -1; | |
1759 | } | |
1760 | return 0; | |
1761 | } | |
1762 | ||
1763 | static bool addr_is_blank(struct sockaddr_storage *ss) | |
1764 | { | |
c44bd69c ID |
1765 | struct in_addr *addr = &((struct sockaddr_in *)ss)->sin_addr; |
1766 | struct in6_addr *addr6 = &((struct sockaddr_in6 *)ss)->sin6_addr; | |
1767 | ||
31b8006e SW |
1768 | switch (ss->ss_family) { |
1769 | case AF_INET: | |
c44bd69c | 1770 | return addr->s_addr == htonl(INADDR_ANY); |
31b8006e | 1771 | case AF_INET6: |
c44bd69c ID |
1772 | return ipv6_addr_any(addr6); |
1773 | default: | |
1774 | return true; | |
31b8006e | 1775 | } |
31b8006e SW |
1776 | } |
1777 | ||
1778 | static int addr_port(struct sockaddr_storage *ss) | |
1779 | { | |
1780 | switch (ss->ss_family) { | |
1781 | case AF_INET: | |
f28bcfbe | 1782 | return ntohs(((struct sockaddr_in *)ss)->sin_port); |
31b8006e | 1783 | case AF_INET6: |
f28bcfbe | 1784 | return ntohs(((struct sockaddr_in6 *)ss)->sin6_port); |
31b8006e SW |
1785 | } |
1786 | return 0; | |
1787 | } | |
1788 | ||
1789 | static void addr_set_port(struct sockaddr_storage *ss, int p) | |
1790 | { | |
1791 | switch (ss->ss_family) { | |
1792 | case AF_INET: | |
1793 | ((struct sockaddr_in *)ss)->sin_port = htons(p); | |
a2a79609 | 1794 | break; |
31b8006e SW |
1795 | case AF_INET6: |
1796 | ((struct sockaddr_in6 *)ss)->sin6_port = htons(p); | |
a2a79609 | 1797 | break; |
31b8006e SW |
1798 | } |
1799 | } | |
1800 | ||
ee3b56f2 NW |
1801 | /* |
1802 | * Unlike other *_pton function semantics, zero indicates success. | |
1803 | */ | |
1804 | static int ceph_pton(const char *str, size_t len, struct sockaddr_storage *ss, | |
1805 | char delim, const char **ipend) | |
1806 | { | |
99f0f3b2 AE |
1807 | struct sockaddr_in *in4 = (struct sockaddr_in *) ss; |
1808 | struct sockaddr_in6 *in6 = (struct sockaddr_in6 *) ss; | |
ee3b56f2 NW |
1809 | |
1810 | memset(ss, 0, sizeof(*ss)); | |
1811 | ||
1812 | if (in4_pton(str, len, (u8 *)&in4->sin_addr.s_addr, delim, ipend)) { | |
1813 | ss->ss_family = AF_INET; | |
1814 | return 0; | |
1815 | } | |
1816 | ||
1817 | if (in6_pton(str, len, (u8 *)&in6->sin6_addr.s6_addr, delim, ipend)) { | |
1818 | ss->ss_family = AF_INET6; | |
1819 | return 0; | |
1820 | } | |
1821 | ||
1822 | return -EINVAL; | |
1823 | } | |
1824 | ||
1825 | /* | |
1826 | * Extract hostname string and resolve using kernel DNS facility. | |
1827 | */ | |
1828 | #ifdef CONFIG_CEPH_LIB_USE_DNS_RESOLVER | |
1829 | static int ceph_dns_resolve_name(const char *name, size_t namelen, | |
1830 | struct sockaddr_storage *ss, char delim, const char **ipend) | |
1831 | { | |
1832 | const char *end, *delim_p; | |
1833 | char *colon_p, *ip_addr = NULL; | |
1834 | int ip_len, ret; | |
1835 | ||
1836 | /* | |
1837 | * The end of the hostname occurs immediately preceding the delimiter or | |
1838 | * the port marker (':') where the delimiter takes precedence. | |
1839 | */ | |
1840 | delim_p = memchr(name, delim, namelen); | |
1841 | colon_p = memchr(name, ':', namelen); | |
1842 | ||
1843 | if (delim_p && colon_p) | |
1844 | end = delim_p < colon_p ? delim_p : colon_p; | |
1845 | else if (!delim_p && colon_p) | |
1846 | end = colon_p; | |
1847 | else { | |
1848 | end = delim_p; | |
1849 | if (!end) /* case: hostname:/ */ | |
1850 | end = name + namelen; | |
1851 | } | |
1852 | ||
1853 | if (end <= name) | |
1854 | return -EINVAL; | |
1855 | ||
1856 | /* do dns_resolve upcall */ | |
1857 | ip_len = dns_query(NULL, name, end - name, NULL, &ip_addr, NULL); | |
1858 | if (ip_len > 0) | |
1859 | ret = ceph_pton(ip_addr, ip_len, ss, -1, NULL); | |
1860 | else | |
1861 | ret = -ESRCH; | |
1862 | ||
1863 | kfree(ip_addr); | |
1864 | ||
1865 | *ipend = end; | |
1866 | ||
1867 | pr_info("resolve '%.*s' (ret=%d): %s\n", (int)(end - name), name, | |
1868 | ret, ret ? "failed" : ceph_pr_addr(ss)); | |
1869 | ||
1870 | return ret; | |
1871 | } | |
1872 | #else | |
1873 | static inline int ceph_dns_resolve_name(const char *name, size_t namelen, | |
1874 | struct sockaddr_storage *ss, char delim, const char **ipend) | |
1875 | { | |
1876 | return -EINVAL; | |
1877 | } | |
1878 | #endif | |
1879 | ||
1880 | /* | |
1881 | * Parse a server name (IP or hostname). If a valid IP address is not found | |
1882 | * then try to extract a hostname to resolve using userspace DNS upcall. | |
1883 | */ | |
1884 | static int ceph_parse_server_name(const char *name, size_t namelen, | |
1885 | struct sockaddr_storage *ss, char delim, const char **ipend) | |
1886 | { | |
1887 | int ret; | |
1888 | ||
1889 | ret = ceph_pton(name, namelen, ss, delim, ipend); | |
1890 | if (ret) | |
1891 | ret = ceph_dns_resolve_name(name, namelen, ss, delim, ipend); | |
1892 | ||
1893 | return ret; | |
1894 | } | |
1895 | ||
31b8006e SW |
1896 | /* |
1897 | * Parse an ip[:port] list into an addr array. Use the default | |
1898 | * monitor port if a port isn't specified. | |
1899 | */ | |
1900 | int ceph_parse_ips(const char *c, const char *end, | |
1901 | struct ceph_entity_addr *addr, | |
1902 | int max_count, int *count) | |
1903 | { | |
ee3b56f2 | 1904 | int i, ret = -EINVAL; |
31b8006e SW |
1905 | const char *p = c; |
1906 | ||
1907 | dout("parse_ips on '%.*s'\n", (int)(end-c), c); | |
1908 | for (i = 0; i < max_count; i++) { | |
1909 | const char *ipend; | |
1910 | struct sockaddr_storage *ss = &addr[i].in_addr; | |
31b8006e | 1911 | int port; |
39139f64 SW |
1912 | char delim = ','; |
1913 | ||
1914 | if (*p == '[') { | |
1915 | delim = ']'; | |
1916 | p++; | |
1917 | } | |
31b8006e | 1918 | |
ee3b56f2 NW |
1919 | ret = ceph_parse_server_name(p, end - p, ss, delim, &ipend); |
1920 | if (ret) | |
31b8006e | 1921 | goto bad; |
ee3b56f2 NW |
1922 | ret = -EINVAL; |
1923 | ||
31b8006e SW |
1924 | p = ipend; |
1925 | ||
39139f64 SW |
1926 | if (delim == ']') { |
1927 | if (*p != ']') { | |
1928 | dout("missing matching ']'\n"); | |
1929 | goto bad; | |
1930 | } | |
1931 | p++; | |
1932 | } | |
1933 | ||
31b8006e SW |
1934 | /* port? */ |
1935 | if (p < end && *p == ':') { | |
1936 | port = 0; | |
1937 | p++; | |
1938 | while (p < end && *p >= '0' && *p <= '9') { | |
1939 | port = (port * 10) + (*p - '0'); | |
1940 | p++; | |
1941 | } | |
f48db1e9 ID |
1942 | if (port == 0) |
1943 | port = CEPH_MON_PORT; | |
1944 | else if (port > 65535) | |
31b8006e SW |
1945 | goto bad; |
1946 | } else { | |
1947 | port = CEPH_MON_PORT; | |
1948 | } | |
1949 | ||
1950 | addr_set_port(ss, port); | |
1951 | ||
3d14c5d2 | 1952 | dout("parse_ips got %s\n", ceph_pr_addr(ss)); |
31b8006e SW |
1953 | |
1954 | if (p == end) | |
1955 | break; | |
1956 | if (*p != ',') | |
1957 | goto bad; | |
1958 | p++; | |
1959 | } | |
1960 | ||
1961 | if (p != end) | |
1962 | goto bad; | |
1963 | ||
1964 | if (count) | |
1965 | *count = i + 1; | |
1966 | return 0; | |
1967 | ||
1968 | bad: | |
39139f64 | 1969 | pr_err("parse_ips bad ip '%.*s'\n", (int)(end - c), c); |
ee3b56f2 | 1970 | return ret; |
31b8006e | 1971 | } |
3d14c5d2 | 1972 | EXPORT_SYMBOL(ceph_parse_ips); |
31b8006e | 1973 | |
eed0ef2c | 1974 | static int process_banner(struct ceph_connection *con) |
31b8006e | 1975 | { |
eed0ef2c | 1976 | dout("process_banner on %p\n", con); |
31b8006e SW |
1977 | |
1978 | if (verify_hello(con) < 0) | |
1979 | return -1; | |
1980 | ||
63f2d211 SW |
1981 | ceph_decode_addr(&con->actual_peer_addr); |
1982 | ceph_decode_addr(&con->peer_addr_for_me); | |
1983 | ||
31b8006e SW |
1984 | /* |
1985 | * Make sure the other end is who we wanted. note that the other | |
1986 | * end may not yet know their ip address, so if it's 0.0.0.0, give | |
1987 | * them the benefit of the doubt. | |
1988 | */ | |
103e2d3a SW |
1989 | if (memcmp(&con->peer_addr, &con->actual_peer_addr, |
1990 | sizeof(con->peer_addr)) != 0 && | |
31b8006e SW |
1991 | !(addr_is_blank(&con->actual_peer_addr.in_addr) && |
1992 | con->actual_peer_addr.nonce == con->peer_addr.nonce)) { | |
b9a67899 JP |
1993 | pr_warn("wrong peer, want %s/%d, got %s/%d\n", |
1994 | ceph_pr_addr(&con->peer_addr.in_addr), | |
1995 | (int)le32_to_cpu(con->peer_addr.nonce), | |
1996 | ceph_pr_addr(&con->actual_peer_addr.in_addr), | |
1997 | (int)le32_to_cpu(con->actual_peer_addr.nonce)); | |
58bb3b37 | 1998 | con->error_msg = "wrong peer at address"; |
31b8006e SW |
1999 | return -1; |
2000 | } | |
2001 | ||
2002 | /* | |
2003 | * did we learn our address? | |
2004 | */ | |
2005 | if (addr_is_blank(&con->msgr->inst.addr.in_addr)) { | |
2006 | int port = addr_port(&con->msgr->inst.addr.in_addr); | |
2007 | ||
2008 | memcpy(&con->msgr->inst.addr.in_addr, | |
2009 | &con->peer_addr_for_me.in_addr, | |
2010 | sizeof(con->peer_addr_for_me.in_addr)); | |
2011 | addr_set_port(&con->msgr->inst.addr.in_addr, port); | |
63f2d211 | 2012 | encode_my_addr(con->msgr); |
eed0ef2c | 2013 | dout("process_banner learned my addr is %s\n", |
3d14c5d2 | 2014 | ceph_pr_addr(&con->msgr->inst.addr.in_addr)); |
31b8006e SW |
2015 | } |
2016 | ||
eed0ef2c SW |
2017 | return 0; |
2018 | } | |
2019 | ||
2020 | static int process_connect(struct ceph_connection *con) | |
2021 | { | |
859bff51 ID |
2022 | u64 sup_feat = from_msgr(con->msgr)->supported_features; |
2023 | u64 req_feat = from_msgr(con->msgr)->required_features; | |
2b3e0c90 ID |
2024 | u64 server_feat = ceph_sanitize_features( |
2025 | le64_to_cpu(con->in_reply.features)); | |
0da5d703 | 2026 | int ret; |
04a419f9 | 2027 | |
eed0ef2c SW |
2028 | dout("process_connect on %p tag %d\n", con, (int)con->in_tag); |
2029 | ||
5c056fdc ID |
2030 | if (con->auth_reply_buf) { |
2031 | /* | |
2032 | * Any connection that defines ->get_authorizer() | |
2033 | * should also define ->verify_authorizer_reply(). | |
2034 | * See get_connect_authorizer(). | |
2035 | */ | |
2036 | ret = con->ops->verify_authorizer_reply(con, 0); | |
2037 | if (ret < 0) { | |
2038 | con->error_msg = "bad authorize reply"; | |
2039 | return ret; | |
2040 | } | |
2041 | } | |
2042 | ||
31b8006e | 2043 | switch (con->in_reply.tag) { |
04a419f9 SW |
2044 | case CEPH_MSGR_TAG_FEATURES: |
2045 | pr_err("%s%lld %s feature set mismatch," | |
2046 | " my %llx < server's %llx, missing %llx\n", | |
2047 | ENTITY_NAME(con->peer_name), | |
3d14c5d2 | 2048 | ceph_pr_addr(&con->peer_addr.in_addr), |
04a419f9 SW |
2049 | sup_feat, server_feat, server_feat & ~sup_feat); |
2050 | con->error_msg = "missing required protocol features"; | |
0fa6ebc6 | 2051 | reset_connection(con); |
04a419f9 SW |
2052 | return -1; |
2053 | ||
31b8006e | 2054 | case CEPH_MSGR_TAG_BADPROTOVER: |
31b8006e SW |
2055 | pr_err("%s%lld %s protocol version mismatch," |
2056 | " my %d != server's %d\n", | |
2057 | ENTITY_NAME(con->peer_name), | |
3d14c5d2 | 2058 | ceph_pr_addr(&con->peer_addr.in_addr), |
31b8006e SW |
2059 | le32_to_cpu(con->out_connect.protocol_version), |
2060 | le32_to_cpu(con->in_reply.protocol_version)); | |
2061 | con->error_msg = "protocol version mismatch"; | |
0fa6ebc6 | 2062 | reset_connection(con); |
31b8006e SW |
2063 | return -1; |
2064 | ||
4e7a5dcd SW |
2065 | case CEPH_MSGR_TAG_BADAUTHORIZER: |
2066 | con->auth_retry++; | |
2067 | dout("process_connect %p got BADAUTHORIZER attempt %d\n", con, | |
2068 | con->auth_retry); | |
2069 | if (con->auth_retry == 2) { | |
2070 | con->error_msg = "connect authorization failure"; | |
4e7a5dcd SW |
2071 | return -1; |
2072 | } | |
6d4221b5 | 2073 | con_out_kvec_reset(con); |
e825a66d | 2074 | ret = prepare_write_connect(con); |
0da5d703 SW |
2075 | if (ret < 0) |
2076 | return ret; | |
63733a0f | 2077 | prepare_read_connect(con); |
4e7a5dcd | 2078 | break; |
31b8006e SW |
2079 | |
2080 | case CEPH_MSGR_TAG_RESETSESSION: | |
2081 | /* | |
2082 | * If we connected with a large connect_seq but the peer | |
2083 | * has no record of a session with us (no connection, or | |
2084 | * connect_seq == 0), they will send RESETSESION to indicate | |
2085 | * that they must have reset their session, and may have | |
2086 | * dropped messages. | |
2087 | */ | |
2088 | dout("process_connect got RESET peer seq %u\n", | |
5bdca4e0 | 2089 | le32_to_cpu(con->in_reply.connect_seq)); |
31b8006e SW |
2090 | pr_err("%s%lld %s connection reset\n", |
2091 | ENTITY_NAME(con->peer_name), | |
3d14c5d2 | 2092 | ceph_pr_addr(&con->peer_addr.in_addr)); |
31b8006e | 2093 | reset_connection(con); |
6d4221b5 | 2094 | con_out_kvec_reset(con); |
5a0f8fdd AE |
2095 | ret = prepare_write_connect(con); |
2096 | if (ret < 0) | |
2097 | return ret; | |
31b8006e SW |
2098 | prepare_read_connect(con); |
2099 | ||
2100 | /* Tell ceph about it. */ | |
ec302645 | 2101 | mutex_unlock(&con->mutex); |
31b8006e SW |
2102 | pr_info("reset on %s%lld\n", ENTITY_NAME(con->peer_name)); |
2103 | if (con->ops->peer_reset) | |
2104 | con->ops->peer_reset(con); | |
ec302645 | 2105 | mutex_lock(&con->mutex); |
8dacc7da | 2106 | if (con->state != CON_STATE_NEGOTIATING) |
0da5d703 | 2107 | return -EAGAIN; |
31b8006e SW |
2108 | break; |
2109 | ||
2110 | case CEPH_MSGR_TAG_RETRY_SESSION: | |
2111 | /* | |
2112 | * If we sent a smaller connect_seq than the peer has, try | |
2113 | * again with a larger value. | |
2114 | */ | |
5bdca4e0 | 2115 | dout("process_connect got RETRY_SESSION my seq %u, peer %u\n", |
31b8006e | 2116 | le32_to_cpu(con->out_connect.connect_seq), |
5bdca4e0 SW |
2117 | le32_to_cpu(con->in_reply.connect_seq)); |
2118 | con->connect_seq = le32_to_cpu(con->in_reply.connect_seq); | |
6d4221b5 | 2119 | con_out_kvec_reset(con); |
5a0f8fdd AE |
2120 | ret = prepare_write_connect(con); |
2121 | if (ret < 0) | |
2122 | return ret; | |
31b8006e SW |
2123 | prepare_read_connect(con); |
2124 | break; | |
2125 | ||
2126 | case CEPH_MSGR_TAG_RETRY_GLOBAL: | |
2127 | /* | |
2128 | * If we sent a smaller global_seq than the peer has, try | |
2129 | * again with a larger value. | |
2130 | */ | |
eed0ef2c | 2131 | dout("process_connect got RETRY_GLOBAL my %u peer_gseq %u\n", |
31b8006e | 2132 | con->peer_global_seq, |
5bdca4e0 | 2133 | le32_to_cpu(con->in_reply.global_seq)); |
31b8006e | 2134 | get_global_seq(con->msgr, |
5bdca4e0 | 2135 | le32_to_cpu(con->in_reply.global_seq)); |
6d4221b5 | 2136 | con_out_kvec_reset(con); |
5a0f8fdd AE |
2137 | ret = prepare_write_connect(con); |
2138 | if (ret < 0) | |
2139 | return ret; | |
31b8006e SW |
2140 | prepare_read_connect(con); |
2141 | break; | |
2142 | ||
3a23083b | 2143 | case CEPH_MSGR_TAG_SEQ: |
31b8006e | 2144 | case CEPH_MSGR_TAG_READY: |
04a419f9 SW |
2145 | if (req_feat & ~server_feat) { |
2146 | pr_err("%s%lld %s protocol feature mismatch," | |
2147 | " my required %llx > server's %llx, need %llx\n", | |
2148 | ENTITY_NAME(con->peer_name), | |
3d14c5d2 | 2149 | ceph_pr_addr(&con->peer_addr.in_addr), |
04a419f9 SW |
2150 | req_feat, server_feat, req_feat & ~server_feat); |
2151 | con->error_msg = "missing required protocol features"; | |
0fa6ebc6 | 2152 | reset_connection(con); |
04a419f9 SW |
2153 | return -1; |
2154 | } | |
8dacc7da | 2155 | |
122070a2 | 2156 | WARN_ON(con->state != CON_STATE_NEGOTIATING); |
8dacc7da | 2157 | con->state = CON_STATE_OPEN; |
20e55c4c | 2158 | con->auth_retry = 0; /* we authenticated; clear flag */ |
31b8006e SW |
2159 | con->peer_global_seq = le32_to_cpu(con->in_reply.global_seq); |
2160 | con->connect_seq++; | |
aba558e2 | 2161 | con->peer_features = server_feat; |
31b8006e SW |
2162 | dout("process_connect got READY gseq %d cseq %d (%d)\n", |
2163 | con->peer_global_seq, | |
2164 | le32_to_cpu(con->in_reply.connect_seq), | |
2165 | con->connect_seq); | |
2166 | WARN_ON(con->connect_seq != | |
2167 | le32_to_cpu(con->in_reply.connect_seq)); | |
92ac41d0 SW |
2168 | |
2169 | if (con->in_reply.flags & CEPH_MSG_CONNECT_LOSSY) | |
c9ffc77a | 2170 | con_flag_set(con, CON_FLAG_LOSSYTX); |
92ac41d0 | 2171 | |
85effe18 | 2172 | con->delay = 0; /* reset backoff memory */ |
92ac41d0 | 2173 | |
3a23083b SW |
2174 | if (con->in_reply.tag == CEPH_MSGR_TAG_SEQ) { |
2175 | prepare_write_seq(con); | |
2176 | prepare_read_seq(con); | |
2177 | } else { | |
2178 | prepare_read_tag(con); | |
2179 | } | |
31b8006e SW |
2180 | break; |
2181 | ||
2182 | case CEPH_MSGR_TAG_WAIT: | |
2183 | /* | |
2184 | * If there is a connection race (we are opening | |
2185 | * connections to each other), one of us may just have | |
2186 | * to WAIT. This shouldn't happen if we are the | |
2187 | * client. | |
2188 | */ | |
04177882 SW |
2189 | con->error_msg = "protocol error, got WAIT as client"; |
2190 | return -1; | |
31b8006e SW |
2191 | |
2192 | default: | |
31b8006e SW |
2193 | con->error_msg = "protocol error, garbage tag during connect"; |
2194 | return -1; | |
2195 | } | |
2196 | return 0; | |
2197 | } | |
2198 | ||
2199 | ||
2200 | /* | |
2201 | * read (part of) an ack | |
2202 | */ | |
2203 | static int read_partial_ack(struct ceph_connection *con) | |
2204 | { | |
fd51653f AE |
2205 | int size = sizeof (con->in_temp_ack); |
2206 | int end = size; | |
31b8006e | 2207 | |
fd51653f | 2208 | return read_partial(con, end, size, &con->in_temp_ack); |
31b8006e SW |
2209 | } |
2210 | ||
31b8006e SW |
2211 | /* |
2212 | * We can finally discard anything that's been acked. | |
2213 | */ | |
2214 | static void process_ack(struct ceph_connection *con) | |
2215 | { | |
2216 | struct ceph_msg *m; | |
2217 | u64 ack = le64_to_cpu(con->in_temp_ack); | |
2218 | u64 seq; | |
2219 | ||
31b8006e SW |
2220 | while (!list_empty(&con->out_sent)) { |
2221 | m = list_first_entry(&con->out_sent, struct ceph_msg, | |
2222 | list_head); | |
2223 | seq = le64_to_cpu(m->hdr.seq); | |
2224 | if (seq > ack) | |
2225 | break; | |
2226 | dout("got ack for seq %llu type %d at %p\n", seq, | |
2227 | le16_to_cpu(m->hdr.type), m); | |
4cf9d544 | 2228 | m->ack_stamp = jiffies; |
31b8006e SW |
2229 | ceph_msg_remove(m); |
2230 | } | |
31b8006e SW |
2231 | prepare_read_tag(con); |
2232 | } | |
2233 | ||
2234 | ||
2450418c | 2235 | static int read_partial_message_section(struct ceph_connection *con, |
213c99ee SW |
2236 | struct kvec *section, |
2237 | unsigned int sec_len, u32 *crc) | |
2450418c | 2238 | { |
68b4476b | 2239 | int ret, left; |
2450418c YS |
2240 | |
2241 | BUG_ON(!section); | |
2242 | ||
2243 | while (section->iov_len < sec_len) { | |
2244 | BUG_ON(section->iov_base == NULL); | |
2245 | left = sec_len - section->iov_len; | |
2246 | ret = ceph_tcp_recvmsg(con->sock, (char *)section->iov_base + | |
2247 | section->iov_len, left); | |
2248 | if (ret <= 0) | |
2249 | return ret; | |
2250 | section->iov_len += ret; | |
2450418c | 2251 | } |
fe3ad593 AE |
2252 | if (section->iov_len == sec_len) |
2253 | *crc = crc32c(0, section->iov_base, section->iov_len); | |
31b8006e | 2254 | |
2450418c YS |
2255 | return 1; |
2256 | } | |
31b8006e | 2257 | |
34d2d200 AE |
2258 | static int read_partial_msg_data(struct ceph_connection *con) |
2259 | { | |
2260 | struct ceph_msg *msg = con->in_msg; | |
8ae4f4f5 | 2261 | struct ceph_msg_data_cursor *cursor = &msg->cursor; |
859bff51 | 2262 | bool do_datacrc = !ceph_test_opt(from_msgr(con->msgr), NOCRC); |
686be208 AE |
2263 | struct page *page; |
2264 | size_t page_offset; | |
2265 | size_t length; | |
f5db90bc | 2266 | u32 crc = 0; |
34d2d200 AE |
2267 | int ret; |
2268 | ||
2269 | BUG_ON(!msg); | |
5240d9f9 | 2270 | if (list_empty(&msg->data)) |
4c59b4a2 | 2271 | return -EIO; |
34d2d200 | 2272 | |
f5db90bc AE |
2273 | if (do_datacrc) |
2274 | crc = con->in_data_crc; | |
643c68a4 | 2275 | while (cursor->resid) { |
343128ce | 2276 | page = ceph_msg_data_next(cursor, &page_offset, &length, NULL); |
686be208 | 2277 | ret = ceph_tcp_recvpage(con->sock, page, page_offset, length); |
f5db90bc AE |
2278 | if (ret <= 0) { |
2279 | if (do_datacrc) | |
2280 | con->in_data_crc = crc; | |
2281 | ||
686be208 | 2282 | return ret; |
f5db90bc | 2283 | } |
686be208 AE |
2284 | |
2285 | if (do_datacrc) | |
f5db90bc | 2286 | crc = ceph_crc32c_page(crc, page, page_offset, ret); |
343128ce | 2287 | (void) ceph_msg_data_advance(cursor, (size_t)ret); |
34d2d200 | 2288 | } |
f5db90bc AE |
2289 | if (do_datacrc) |
2290 | con->in_data_crc = crc; | |
34d2d200 AE |
2291 | |
2292 | return 1; /* must return > 0 to indicate success */ | |
2293 | } | |
2294 | ||
31b8006e SW |
2295 | /* |
2296 | * read (part of) a message. | |
2297 | */ | |
686be208 AE |
2298 | static int ceph_con_in_msg_alloc(struct ceph_connection *con, int *skip); |
2299 | ||
31b8006e SW |
2300 | static int read_partial_message(struct ceph_connection *con) |
2301 | { | |
2302 | struct ceph_msg *m = con->in_msg; | |
fd51653f AE |
2303 | int size; |
2304 | int end; | |
31b8006e | 2305 | int ret; |
95c96174 | 2306 | unsigned int front_len, middle_len, data_len; |
859bff51 | 2307 | bool do_datacrc = !ceph_test_opt(from_msgr(con->msgr), NOCRC); |
33d07337 | 2308 | bool need_sign = (con->peer_features & CEPH_FEATURE_MSG_AUTH); |
ae18756b | 2309 | u64 seq; |
fe3ad593 | 2310 | u32 crc; |
31b8006e SW |
2311 | |
2312 | dout("read_partial_message con %p msg %p\n", con, m); | |
2313 | ||
2314 | /* header */ | |
fd51653f AE |
2315 | size = sizeof (con->in_hdr); |
2316 | end = size; | |
2317 | ret = read_partial(con, end, size, &con->in_hdr); | |
57dac9d1 AE |
2318 | if (ret <= 0) |
2319 | return ret; | |
fe3ad593 AE |
2320 | |
2321 | crc = crc32c(0, &con->in_hdr, offsetof(struct ceph_msg_header, crc)); | |
2322 | if (cpu_to_le32(crc) != con->in_hdr.crc) { | |
67c64eb7 | 2323 | pr_err("read_partial_message bad hdr crc %u != expected %u\n", |
fe3ad593 AE |
2324 | crc, con->in_hdr.crc); |
2325 | return -EBADMSG; | |
2326 | } | |
2327 | ||
31b8006e SW |
2328 | front_len = le32_to_cpu(con->in_hdr.front_len); |
2329 | if (front_len > CEPH_MSG_MAX_FRONT_LEN) | |
2330 | return -EIO; | |
2331 | middle_len = le32_to_cpu(con->in_hdr.middle_len); | |
7b11ba37 | 2332 | if (middle_len > CEPH_MSG_MAX_MIDDLE_LEN) |
31b8006e SW |
2333 | return -EIO; |
2334 | data_len = le32_to_cpu(con->in_hdr.data_len); | |
2335 | if (data_len > CEPH_MSG_MAX_DATA_LEN) | |
2336 | return -EIO; | |
2337 | ||
ae18756b SW |
2338 | /* verify seq# */ |
2339 | seq = le64_to_cpu(con->in_hdr.seq); | |
2340 | if ((s64)seq - (s64)con->in_seq < 1) { | |
df9f86fa | 2341 | pr_info("skipping %s%lld %s seq %lld expected %lld\n", |
ae18756b | 2342 | ENTITY_NAME(con->peer_name), |
3d14c5d2 | 2343 | ceph_pr_addr(&con->peer_addr.in_addr), |
ae18756b SW |
2344 | seq, con->in_seq + 1); |
2345 | con->in_base_pos = -front_len - middle_len - data_len - | |
dbc0d3ca | 2346 | sizeof_footer(con); |
ae18756b | 2347 | con->in_tag = CEPH_MSGR_TAG_READY; |
e7a88e82 | 2348 | return 1; |
ae18756b SW |
2349 | } else if ((s64)seq - (s64)con->in_seq > 1) { |
2350 | pr_err("read_partial_message bad seq %lld expected %lld\n", | |
2351 | seq, con->in_seq + 1); | |
2352 | con->error_msg = "bad message sequence # for incoming message"; | |
67c64eb7 | 2353 | return -EBADE; |
ae18756b SW |
2354 | } |
2355 | ||
31b8006e SW |
2356 | /* allocate message? */ |
2357 | if (!con->in_msg) { | |
4740a623 SW |
2358 | int skip = 0; |
2359 | ||
31b8006e | 2360 | dout("got hdr type %d front %d data %d\n", con->in_hdr.type, |
6ebc8b32 | 2361 | front_len, data_len); |
4740a623 SW |
2362 | ret = ceph_con_in_msg_alloc(con, &skip); |
2363 | if (ret < 0) | |
2364 | return ret; | |
f759ebb9 AE |
2365 | |
2366 | BUG_ON(!con->in_msg ^ skip); | |
2450418c | 2367 | if (skip) { |
31b8006e | 2368 | /* skip this message */ |
a79832f2 | 2369 | dout("alloc_msg said skip message\n"); |
31b8006e | 2370 | con->in_base_pos = -front_len - middle_len - data_len - |
dbc0d3ca | 2371 | sizeof_footer(con); |
31b8006e | 2372 | con->in_tag = CEPH_MSGR_TAG_READY; |
684be25c | 2373 | con->in_seq++; |
e7a88e82 | 2374 | return 1; |
31b8006e | 2375 | } |
38941f80 | 2376 | |
4740a623 | 2377 | BUG_ON(!con->in_msg); |
38941f80 | 2378 | BUG_ON(con->in_msg->con != con); |
31b8006e SW |
2379 | m = con->in_msg; |
2380 | m->front.iov_len = 0; /* haven't read it yet */ | |
2450418c YS |
2381 | if (m->middle) |
2382 | m->middle->vec.iov_len = 0; | |
9d7f0f13 | 2383 | |
78625051 | 2384 | /* prepare for data payload, if any */ |
a4107026 | 2385 | |
78625051 | 2386 | if (data_len) |
98fa5dd8 | 2387 | prepare_message_data(con->in_msg, data_len); |
31b8006e SW |
2388 | } |
2389 | ||
2390 | /* front */ | |
2450418c YS |
2391 | ret = read_partial_message_section(con, &m->front, front_len, |
2392 | &con->in_front_crc); | |
2393 | if (ret <= 0) | |
2394 | return ret; | |
31b8006e SW |
2395 | |
2396 | /* middle */ | |
2450418c | 2397 | if (m->middle) { |
213c99ee SW |
2398 | ret = read_partial_message_section(con, &m->middle->vec, |
2399 | middle_len, | |
2450418c | 2400 | &con->in_middle_crc); |
31b8006e SW |
2401 | if (ret <= 0) |
2402 | return ret; | |
31b8006e SW |
2403 | } |
2404 | ||
2405 | /* (page) data */ | |
34d2d200 AE |
2406 | if (data_len) { |
2407 | ret = read_partial_msg_data(con); | |
2408 | if (ret <= 0) | |
2409 | return ret; | |
31b8006e SW |
2410 | } |
2411 | ||
31b8006e | 2412 | /* footer */ |
89f08173 | 2413 | size = sizeof_footer(con); |
fd51653f AE |
2414 | end += size; |
2415 | ret = read_partial(con, end, size, &m->footer); | |
57dac9d1 AE |
2416 | if (ret <= 0) |
2417 | return ret; | |
2418 | ||
33d07337 YZ |
2419 | if (!need_sign) { |
2420 | m->footer.flags = m->old_footer.flags; | |
2421 | m->footer.sig = 0; | |
2422 | } | |
2423 | ||
31b8006e SW |
2424 | dout("read_partial_message got msg %p %d (%u) + %d (%u) + %d (%u)\n", |
2425 | m, front_len, m->footer.front_crc, middle_len, | |
2426 | m->footer.middle_crc, data_len, m->footer.data_crc); | |
2427 | ||
2428 | /* crc ok? */ | |
2429 | if (con->in_front_crc != le32_to_cpu(m->footer.front_crc)) { | |
2430 | pr_err("read_partial_message %p front crc %u != exp. %u\n", | |
2431 | m, con->in_front_crc, m->footer.front_crc); | |
2432 | return -EBADMSG; | |
2433 | } | |
2434 | if (con->in_middle_crc != le32_to_cpu(m->footer.middle_crc)) { | |
2435 | pr_err("read_partial_message %p middle crc %u != exp %u\n", | |
2436 | m, con->in_middle_crc, m->footer.middle_crc); | |
2437 | return -EBADMSG; | |
2438 | } | |
bca064d2 | 2439 | if (do_datacrc && |
31b8006e SW |
2440 | (m->footer.flags & CEPH_MSG_FOOTER_NOCRC) == 0 && |
2441 | con->in_data_crc != le32_to_cpu(m->footer.data_crc)) { | |
2442 | pr_err("read_partial_message %p data crc %u != exp. %u\n", m, | |
2443 | con->in_data_crc, le32_to_cpu(m->footer.data_crc)); | |
2444 | return -EBADMSG; | |
2445 | } | |
2446 | ||
33d07337 | 2447 | if (need_sign && con->ops->check_message_signature && |
79dbd1ba | 2448 | con->ops->check_message_signature(m)) { |
33d07337 YZ |
2449 | pr_err("read_partial_message %p signature check failed\n", m); |
2450 | return -EBADMSG; | |
2451 | } | |
2452 | ||
31b8006e SW |
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 | { | |
583d0fef | 2463 | struct ceph_msg *msg = con->in_msg; |
31b8006e | 2464 | |
38941f80 | 2465 | BUG_ON(con->in_msg->con != con); |
31b8006e SW |
2466 | con->in_msg = NULL; |
2467 | ||
2468 | /* if first message, set peer_name */ | |
2469 | if (con->peer_name.type == 0) | |
dbad185d | 2470 | con->peer_name = msg->hdr.src; |
31b8006e | 2471 | |
31b8006e | 2472 | con->in_seq++; |
ec302645 | 2473 | mutex_unlock(&con->mutex); |
31b8006e SW |
2474 | |
2475 | dout("===== %p %llu from %s%lld %d=%s len %d+%d (%u %u %u) =====\n", | |
2476 | msg, le64_to_cpu(msg->hdr.seq), | |
dbad185d | 2477 | ENTITY_NAME(msg->hdr.src), |
31b8006e SW |
2478 | le16_to_cpu(msg->hdr.type), |
2479 | ceph_msg_type_name(le16_to_cpu(msg->hdr.type)), | |
2480 | le32_to_cpu(msg->hdr.front_len), | |
2481 | le32_to_cpu(msg->hdr.data_len), | |
2482 | con->in_front_crc, con->in_middle_crc, con->in_data_crc); | |
2483 | con->ops->dispatch(con, msg); | |
ec302645 SW |
2484 | |
2485 | mutex_lock(&con->mutex); | |
31b8006e SW |
2486 | } |
2487 | ||
8b9558aa YZ |
2488 | static int read_keepalive_ack(struct ceph_connection *con) |
2489 | { | |
2490 | struct ceph_timespec ceph_ts; | |
2491 | size_t size = sizeof(ceph_ts); | |
2492 | int ret = read_partial(con, size, size, &ceph_ts); | |
2493 | if (ret <= 0) | |
2494 | return ret; | |
2495 | ceph_decode_timespec(&con->last_keepalive_ack, &ceph_ts); | |
2496 | prepare_read_tag(con); | |
2497 | return 1; | |
2498 | } | |
31b8006e SW |
2499 | |
2500 | /* | |
2501 | * Write something to the socket. Called in a worker thread when the | |
2502 | * socket appears to be writeable and we have something ready to send. | |
2503 | */ | |
2504 | static int try_write(struct ceph_connection *con) | |
2505 | { | |
31b8006e SW |
2506 | int ret = 1; |
2507 | ||
d59315ca | 2508 | dout("try_write start %p state %lu\n", con, con->state); |
31b8006e | 2509 | |
31b8006e SW |
2510 | more: |
2511 | dout("try_write out_kvec_bytes %d\n", con->out_kvec_bytes); | |
2512 | ||
2513 | /* open the socket first? */ | |
8dacc7da SW |
2514 | if (con->state == CON_STATE_PREOPEN) { |
2515 | BUG_ON(con->sock); | |
2516 | con->state = CON_STATE_CONNECTING; | |
a5988c49 | 2517 | |
e2200423 | 2518 | con_out_kvec_reset(con); |
e825a66d | 2519 | prepare_write_banner(con); |
eed0ef2c | 2520 | prepare_read_banner(con); |
31b8006e | 2521 | |
cf3e5c40 | 2522 | BUG_ON(con->in_msg); |
31b8006e SW |
2523 | con->in_tag = CEPH_MSGR_TAG_READY; |
2524 | dout("try_write initiating connect on %p new state %lu\n", | |
2525 | con, con->state); | |
41617d0c AE |
2526 | ret = ceph_tcp_connect(con); |
2527 | if (ret < 0) { | |
31b8006e | 2528 | con->error_msg = "connect error"; |
31b8006e SW |
2529 | goto out; |
2530 | } | |
2531 | } | |
2532 | ||
2533 | more_kvec: | |
2534 | /* kvec data queued? */ | |
67645d76 ID |
2535 | if (con->out_kvec_left) { |
2536 | ret = write_partial_kvec(con); | |
31b8006e | 2537 | if (ret <= 0) |
42961d23 | 2538 | goto out; |
31b8006e | 2539 | } |
67645d76 ID |
2540 | if (con->out_skip) { |
2541 | ret = write_partial_skip(con); | |
31b8006e | 2542 | if (ret <= 0) |
42961d23 | 2543 | goto out; |
31b8006e SW |
2544 | } |
2545 | ||
2546 | /* msg pages? */ | |
2547 | if (con->out_msg) { | |
c86a2930 SW |
2548 | if (con->out_msg_done) { |
2549 | ceph_msg_put(con->out_msg); | |
2550 | con->out_msg = NULL; /* we're done with this one */ | |
2551 | goto do_next; | |
2552 | } | |
2553 | ||
34d2d200 | 2554 | ret = write_partial_message_data(con); |
31b8006e SW |
2555 | if (ret == 1) |
2556 | goto more_kvec; /* we need to send the footer, too! */ | |
2557 | if (ret == 0) | |
42961d23 | 2558 | goto out; |
31b8006e | 2559 | if (ret < 0) { |
34d2d200 | 2560 | dout("try_write write_partial_message_data err %d\n", |
31b8006e | 2561 | ret); |
42961d23 | 2562 | goto out; |
31b8006e SW |
2563 | } |
2564 | } | |
2565 | ||
c86a2930 | 2566 | do_next: |
8dacc7da | 2567 | if (con->state == CON_STATE_OPEN) { |
8b9558aa YZ |
2568 | if (con_flag_test_and_clear(con, CON_FLAG_KEEPALIVE_PENDING)) { |
2569 | prepare_write_keepalive(con); | |
2570 | goto more; | |
2571 | } | |
31b8006e SW |
2572 | /* is anything else pending? */ |
2573 | if (!list_empty(&con->out_queue)) { | |
2574 | prepare_write_message(con); | |
2575 | goto more; | |
2576 | } | |
2577 | if (con->in_seq > con->in_seq_acked) { | |
2578 | prepare_write_ack(con); | |
2579 | goto more; | |
2580 | } | |
31b8006e SW |
2581 | } |
2582 | ||
2583 | /* Nothing to do! */ | |
c9ffc77a | 2584 | con_flag_clear(con, CON_FLAG_WRITE_PENDING); |
31b8006e | 2585 | dout("try_write nothing else to write.\n"); |
31b8006e SW |
2586 | ret = 0; |
2587 | out: | |
42961d23 | 2588 | dout("try_write done on %p ret %d\n", con, ret); |
31b8006e SW |
2589 | return ret; |
2590 | } | |
2591 | ||
2592 | ||
2593 | ||
2594 | /* | |
2595 | * Read what we can from the socket. | |
2596 | */ | |
2597 | static int try_read(struct ceph_connection *con) | |
2598 | { | |
31b8006e SW |
2599 | int ret = -1; |
2600 | ||
8dacc7da SW |
2601 | more: |
2602 | dout("try_read start on %p state %lu\n", con, con->state); | |
2603 | if (con->state != CON_STATE_CONNECTING && | |
2604 | con->state != CON_STATE_NEGOTIATING && | |
2605 | con->state != CON_STATE_OPEN) | |
31b8006e SW |
2606 | return 0; |
2607 | ||
8dacc7da | 2608 | BUG_ON(!con->sock); |
ec302645 | 2609 | |
31b8006e SW |
2610 | dout("try_read tag %d in_base_pos %d\n", (int)con->in_tag, |
2611 | con->in_base_pos); | |
0da5d703 | 2612 | |
8dacc7da | 2613 | if (con->state == CON_STATE_CONNECTING) { |
7593af92 AE |
2614 | dout("try_read connecting\n"); |
2615 | ret = read_partial_banner(con); | |
2616 | if (ret <= 0) | |
ab166d5a | 2617 | goto out; |
7593af92 AE |
2618 | ret = process_banner(con); |
2619 | if (ret < 0) | |
2620 | goto out; | |
2621 | ||
8dacc7da | 2622 | con->state = CON_STATE_NEGOTIATING; |
7593af92 | 2623 | |
6d4221b5 JS |
2624 | /* |
2625 | * Received banner is good, exchange connection info. | |
2626 | * Do not reset out_kvec, as sending our banner raced | |
2627 | * with receiving peer banner after connect completed. | |
2628 | */ | |
7593af92 AE |
2629 | ret = prepare_write_connect(con); |
2630 | if (ret < 0) | |
2631 | goto out; | |
2632 | prepare_read_connect(con); | |
2633 | ||
2634 | /* Send connection info before awaiting response */ | |
0da5d703 SW |
2635 | goto out; |
2636 | } | |
2637 | ||
8dacc7da | 2638 | if (con->state == CON_STATE_NEGOTIATING) { |
7593af92 | 2639 | dout("try_read negotiating\n"); |
31b8006e SW |
2640 | ret = read_partial_connect(con); |
2641 | if (ret <= 0) | |
31b8006e | 2642 | goto out; |
98bdb0aa SW |
2643 | ret = process_connect(con); |
2644 | if (ret < 0) | |
2645 | goto out; | |
31b8006e SW |
2646 | goto more; |
2647 | } | |
2648 | ||
122070a2 | 2649 | WARN_ON(con->state != CON_STATE_OPEN); |
8dacc7da | 2650 | |
31b8006e SW |
2651 | if (con->in_base_pos < 0) { |
2652 | /* | |
2653 | * skipping + discarding content. | |
2654 | * | |
2655 | * FIXME: there must be a better way to do this! | |
2656 | */ | |
84495f49 AE |
2657 | static char buf[SKIP_BUF_SIZE]; |
2658 | int skip = min((int) sizeof (buf), -con->in_base_pos); | |
2659 | ||
31b8006e SW |
2660 | dout("skipping %d / %d bytes\n", skip, -con->in_base_pos); |
2661 | ret = ceph_tcp_recvmsg(con->sock, buf, skip); | |
2662 | if (ret <= 0) | |
98bdb0aa | 2663 | goto out; |
31b8006e SW |
2664 | con->in_base_pos += ret; |
2665 | if (con->in_base_pos) | |
2666 | goto more; | |
2667 | } | |
2668 | if (con->in_tag == CEPH_MSGR_TAG_READY) { | |
2669 | /* | |
2670 | * what's next? | |
2671 | */ | |
2672 | ret = ceph_tcp_recvmsg(con->sock, &con->in_tag, 1); | |
2673 | if (ret <= 0) | |
98bdb0aa | 2674 | goto out; |
31b8006e SW |
2675 | dout("try_read got tag %d\n", (int)con->in_tag); |
2676 | switch (con->in_tag) { | |
2677 | case CEPH_MSGR_TAG_MSG: | |
2678 | prepare_read_message(con); | |
2679 | break; | |
2680 | case CEPH_MSGR_TAG_ACK: | |
2681 | prepare_read_ack(con); | |
2682 | break; | |
8b9558aa YZ |
2683 | case CEPH_MSGR_TAG_KEEPALIVE2_ACK: |
2684 | prepare_read_keepalive_ack(con); | |
2685 | break; | |
31b8006e | 2686 | case CEPH_MSGR_TAG_CLOSE: |
8dacc7da SW |
2687 | con_close_socket(con); |
2688 | con->state = CON_STATE_CLOSED; | |
98bdb0aa | 2689 | goto out; |
31b8006e SW |
2690 | default: |
2691 | goto bad_tag; | |
2692 | } | |
2693 | } | |
2694 | if (con->in_tag == CEPH_MSGR_TAG_MSG) { | |
2695 | ret = read_partial_message(con); | |
2696 | if (ret <= 0) { | |
2697 | switch (ret) { | |
2698 | case -EBADMSG: | |
a51983e4 | 2699 | con->error_msg = "bad crc/signature"; |
67c64eb7 ID |
2700 | /* fall through */ |
2701 | case -EBADE: | |
31b8006e | 2702 | ret = -EIO; |
98bdb0aa | 2703 | break; |
31b8006e SW |
2704 | case -EIO: |
2705 | con->error_msg = "io error"; | |
98bdb0aa | 2706 | break; |
31b8006e | 2707 | } |
98bdb0aa | 2708 | goto out; |
31b8006e SW |
2709 | } |
2710 | if (con->in_tag == CEPH_MSGR_TAG_READY) | |
2711 | goto more; | |
2712 | process_message(con); | |
7b862e07 SW |
2713 | if (con->state == CON_STATE_OPEN) |
2714 | prepare_read_tag(con); | |
31b8006e SW |
2715 | goto more; |
2716 | } | |
3a23083b SW |
2717 | if (con->in_tag == CEPH_MSGR_TAG_ACK || |
2718 | con->in_tag == CEPH_MSGR_TAG_SEQ) { | |
2719 | /* | |
2720 | * the final handshake seq exchange is semantically | |
2721 | * equivalent to an ACK | |
2722 | */ | |
31b8006e SW |
2723 | ret = read_partial_ack(con); |
2724 | if (ret <= 0) | |
98bdb0aa | 2725 | goto out; |
31b8006e SW |
2726 | process_ack(con); |
2727 | goto more; | |
2728 | } | |
8b9558aa YZ |
2729 | if (con->in_tag == CEPH_MSGR_TAG_KEEPALIVE2_ACK) { |
2730 | ret = read_keepalive_ack(con); | |
2731 | if (ret <= 0) | |
2732 | goto out; | |
2733 | goto more; | |
2734 | } | |
31b8006e | 2735 | |
31b8006e | 2736 | out: |
98bdb0aa | 2737 | dout("try_read done on %p ret %d\n", con, ret); |
31b8006e SW |
2738 | return ret; |
2739 | ||
2740 | bad_tag: | |
2741 | pr_err("try_read bad con->in_tag = %d\n", (int)con->in_tag); | |
2742 | con->error_msg = "protocol error, garbage tag"; | |
2743 | ret = -1; | |
2744 | goto out; | |
2745 | } | |
2746 | ||
2747 | ||
2748 | /* | |
802c6d96 AE |
2749 | * Atomically queue work on a connection after the specified delay. |
2750 | * Bump @con reference to avoid races with connection teardown. | |
2751 | * Returns 0 if work was queued, or an error code otherwise. | |
31b8006e | 2752 | */ |
802c6d96 | 2753 | static int queue_con_delay(struct ceph_connection *con, unsigned long delay) |
31b8006e | 2754 | { |
31b8006e | 2755 | if (!con->ops->get(con)) { |
802c6d96 | 2756 | dout("%s %p ref count 0\n", __func__, con); |
802c6d96 | 2757 | return -ENOENT; |
31b8006e SW |
2758 | } |
2759 | ||
802c6d96 AE |
2760 | if (!queue_delayed_work(ceph_msgr_wq, &con->work, delay)) { |
2761 | dout("%s %p - already queued\n", __func__, con); | |
31b8006e | 2762 | con->ops->put(con); |
802c6d96 | 2763 | return -EBUSY; |
31b8006e | 2764 | } |
802c6d96 AE |
2765 | |
2766 | dout("%s %p %lu\n", __func__, con, delay); | |
802c6d96 AE |
2767 | return 0; |
2768 | } | |
2769 | ||
2770 | static void queue_con(struct ceph_connection *con) | |
2771 | { | |
2772 | (void) queue_con_delay(con, 0); | |
31b8006e SW |
2773 | } |
2774 | ||
37ab77ac ID |
2775 | static void cancel_con(struct ceph_connection *con) |
2776 | { | |
2777 | if (cancel_delayed_work(&con->work)) { | |
2778 | dout("%s %p\n", __func__, con); | |
2779 | con->ops->put(con); | |
2780 | } | |
2781 | } | |
2782 | ||
7bb21d68 AE |
2783 | static bool con_sock_closed(struct ceph_connection *con) |
2784 | { | |
c9ffc77a | 2785 | if (!con_flag_test_and_clear(con, CON_FLAG_SOCK_CLOSED)) |
7bb21d68 AE |
2786 | return false; |
2787 | ||
2788 | #define CASE(x) \ | |
2789 | case CON_STATE_ ## x: \ | |
2790 | con->error_msg = "socket closed (con state " #x ")"; \ | |
2791 | break; | |
2792 | ||
2793 | switch (con->state) { | |
2794 | CASE(CLOSED); | |
2795 | CASE(PREOPEN); | |
2796 | CASE(CONNECTING); | |
2797 | CASE(NEGOTIATING); | |
2798 | CASE(OPEN); | |
2799 | CASE(STANDBY); | |
2800 | default: | |
b9a67899 | 2801 | pr_warn("%s con %p unrecognized state %lu\n", |
7bb21d68 AE |
2802 | __func__, con, con->state); |
2803 | con->error_msg = "unrecognized con state"; | |
2804 | BUG(); | |
2805 | break; | |
2806 | } | |
2807 | #undef CASE | |
2808 | ||
2809 | return true; | |
2810 | } | |
2811 | ||
f20a39fd AE |
2812 | static bool con_backoff(struct ceph_connection *con) |
2813 | { | |
2814 | int ret; | |
2815 | ||
2816 | if (!con_flag_test_and_clear(con, CON_FLAG_BACKOFF)) | |
2817 | return false; | |
2818 | ||
2819 | ret = queue_con_delay(con, round_jiffies_relative(con->delay)); | |
2820 | if (ret) { | |
2821 | dout("%s: con %p FAILED to back off %lu\n", __func__, | |
2822 | con, con->delay); | |
2823 | BUG_ON(ret == -ENOENT); | |
2824 | con_flag_set(con, CON_FLAG_BACKOFF); | |
2825 | } | |
2826 | ||
2827 | return true; | |
2828 | } | |
2829 | ||
93209264 AE |
2830 | /* Finish fault handling; con->mutex must *not* be held here */ |
2831 | ||
2832 | static void con_fault_finish(struct ceph_connection *con) | |
2833 | { | |
f6330cc1 ID |
2834 | dout("%s %p\n", __func__, con); |
2835 | ||
93209264 AE |
2836 | /* |
2837 | * in case we faulted due to authentication, invalidate our | |
2838 | * current tickets so that we can get new ones. | |
2839 | */ | |
f6330cc1 ID |
2840 | if (con->auth_retry) { |
2841 | dout("auth_retry %d, invalidating\n", con->auth_retry); | |
2842 | if (con->ops->invalidate_authorizer) | |
2843 | con->ops->invalidate_authorizer(con); | |
2844 | con->auth_retry = 0; | |
93209264 AE |
2845 | } |
2846 | ||
2847 | if (con->ops->fault) | |
2848 | con->ops->fault(con); | |
2849 | } | |
2850 | ||
31b8006e SW |
2851 | /* |
2852 | * Do some work on a connection. Drop a connection ref when we're done. | |
2853 | */ | |
68931622 | 2854 | static void ceph_con_workfn(struct work_struct *work) |
31b8006e SW |
2855 | { |
2856 | struct ceph_connection *con = container_of(work, struct ceph_connection, | |
2857 | work.work); | |
49659416 | 2858 | bool fault; |
31b8006e | 2859 | |
9dd4658d | 2860 | mutex_lock(&con->mutex); |
49659416 AE |
2861 | while (true) { |
2862 | int ret; | |
31b8006e | 2863 | |
49659416 AE |
2864 | if ((fault = con_sock_closed(con))) { |
2865 | dout("%s: con %p SOCK_CLOSED\n", __func__, con); | |
2866 | break; | |
2867 | } | |
2868 | if (con_backoff(con)) { | |
2869 | dout("%s: con %p BACKOFF\n", __func__, con); | |
2870 | break; | |
2871 | } | |
2872 | if (con->state == CON_STATE_STANDBY) { | |
2873 | dout("%s: con %p STANDBY\n", __func__, con); | |
2874 | break; | |
2875 | } | |
2876 | if (con->state == CON_STATE_CLOSED) { | |
2877 | dout("%s: con %p CLOSED\n", __func__, con); | |
2878 | BUG_ON(con->sock); | |
2879 | break; | |
2880 | } | |
2881 | if (con->state == CON_STATE_PREOPEN) { | |
2882 | dout("%s: con %p PREOPEN\n", __func__, con); | |
2883 | BUG_ON(con->sock); | |
2884 | } | |
0da5d703 | 2885 | |
49659416 AE |
2886 | ret = try_read(con); |
2887 | if (ret < 0) { | |
2888 | if (ret == -EAGAIN) | |
2889 | continue; | |
67c64eb7 ID |
2890 | if (!con->error_msg) |
2891 | con->error_msg = "socket error on read"; | |
49659416 AE |
2892 | fault = true; |
2893 | break; | |
2894 | } | |
2895 | ||
2896 | ret = try_write(con); | |
2897 | if (ret < 0) { | |
2898 | if (ret == -EAGAIN) | |
2899 | continue; | |
67c64eb7 ID |
2900 | if (!con->error_msg) |
2901 | con->error_msg = "socket error on write"; | |
49659416 AE |
2902 | fault = true; |
2903 | } | |
2904 | ||
2905 | break; /* If we make it to here, we're done */ | |
3a140a0d | 2906 | } |
b6e7b6a1 AE |
2907 | if (fault) |
2908 | con_fault(con); | |
9dd4658d | 2909 | mutex_unlock(&con->mutex); |
0da5d703 | 2910 | |
b6e7b6a1 AE |
2911 | if (fault) |
2912 | con_fault_finish(con); | |
2913 | ||
2914 | con->ops->put(con); | |
31b8006e SW |
2915 | } |
2916 | ||
31b8006e SW |
2917 | /* |
2918 | * Generic error/fault handler. A retry mechanism is used with | |
2919 | * exponential backoff | |
2920 | */ | |
93209264 | 2921 | static void con_fault(struct ceph_connection *con) |
31b8006e | 2922 | { |
31b8006e | 2923 | dout("fault %p state %lu to peer %s\n", |
3d14c5d2 | 2924 | con, con->state, ceph_pr_addr(&con->peer_addr.in_addr)); |
31b8006e | 2925 | |
67c64eb7 ID |
2926 | pr_warn("%s%lld %s %s\n", ENTITY_NAME(con->peer_name), |
2927 | ceph_pr_addr(&con->peer_addr.in_addr), con->error_msg); | |
2928 | con->error_msg = NULL; | |
2929 | ||
122070a2 | 2930 | WARN_ON(con->state != CON_STATE_CONNECTING && |
8dacc7da SW |
2931 | con->state != CON_STATE_NEGOTIATING && |
2932 | con->state != CON_STATE_OPEN); | |
ec302645 | 2933 | |
31b8006e | 2934 | con_close_socket(con); |
5e095e8b | 2935 | |
c9ffc77a | 2936 | if (con_flag_test(con, CON_FLAG_LOSSYTX)) { |
8dacc7da SW |
2937 | dout("fault on LOSSYTX channel, marking CLOSED\n"); |
2938 | con->state = CON_STATE_CLOSED; | |
93209264 | 2939 | return; |
3b5ede07 SW |
2940 | } |
2941 | ||
5e095e8b | 2942 | if (con->in_msg) { |
38941f80 | 2943 | BUG_ON(con->in_msg->con != con); |
5e095e8b SW |
2944 | ceph_msg_put(con->in_msg); |
2945 | con->in_msg = NULL; | |
2946 | } | |
31b8006e | 2947 | |
e80a52d1 SW |
2948 | /* Requeue anything that hasn't been acked */ |
2949 | list_splice_init(&con->out_sent, &con->out_queue); | |
9bd2e6f8 | 2950 | |
e76661d0 SW |
2951 | /* If there are no messages queued or keepalive pending, place |
2952 | * the connection in a STANDBY state */ | |
2953 | if (list_empty(&con->out_queue) && | |
c9ffc77a | 2954 | !con_flag_test(con, CON_FLAG_KEEPALIVE_PENDING)) { |
e00de341 | 2955 | dout("fault %p setting STANDBY clearing WRITE_PENDING\n", con); |
c9ffc77a | 2956 | con_flag_clear(con, CON_FLAG_WRITE_PENDING); |
8dacc7da | 2957 | con->state = CON_STATE_STANDBY; |
e80a52d1 SW |
2958 | } else { |
2959 | /* retry after a delay. */ | |
8dacc7da | 2960 | con->state = CON_STATE_PREOPEN; |
e80a52d1 SW |
2961 | if (con->delay == 0) |
2962 | con->delay = BASE_DELAY_INTERVAL; | |
2963 | else if (con->delay < MAX_DELAY_INTERVAL) | |
2964 | con->delay *= 2; | |
c9ffc77a | 2965 | con_flag_set(con, CON_FLAG_BACKOFF); |
8618e30b | 2966 | queue_con(con); |
31b8006e | 2967 | } |
31b8006e SW |
2968 | } |
2969 | ||
2970 | ||
2971 | ||
2972 | /* | |
15d9882c | 2973 | * initialize a new messenger instance |
31b8006e | 2974 | */ |
15d9882c | 2975 | void ceph_messenger_init(struct ceph_messenger *msgr, |
859bff51 | 2976 | struct ceph_entity_addr *myaddr) |
31b8006e | 2977 | { |
31b8006e SW |
2978 | spin_lock_init(&msgr->global_seq_lock); |
2979 | ||
31b8006e SW |
2980 | if (myaddr) |
2981 | msgr->inst.addr = *myaddr; | |
2982 | ||
2983 | /* select a random nonce */ | |
ac8839d7 | 2984 | msgr->inst.addr.type = 0; |
103e2d3a | 2985 | get_random_bytes(&msgr->inst.addr.nonce, sizeof(msgr->inst.addr.nonce)); |
63f2d211 | 2986 | encode_my_addr(msgr); |
31b8006e | 2987 | |
a2a32584 | 2988 | atomic_set(&msgr->stopping, 0); |
757856d2 | 2989 | write_pnet(&msgr->net, get_net(current->nsproxy->net_ns)); |
31b8006e | 2990 | |
15d9882c | 2991 | dout("%s %p\n", __func__, msgr); |
31b8006e | 2992 | } |
15d9882c | 2993 | EXPORT_SYMBOL(ceph_messenger_init); |
31b8006e | 2994 | |
757856d2 ID |
2995 | void ceph_messenger_fini(struct ceph_messenger *msgr) |
2996 | { | |
2997 | put_net(read_pnet(&msgr->net)); | |
2998 | } | |
2999 | EXPORT_SYMBOL(ceph_messenger_fini); | |
3000 | ||
583d0fef ID |
3001 | static void msg_con_set(struct ceph_msg *msg, struct ceph_connection *con) |
3002 | { | |
3003 | if (msg->con) | |
3004 | msg->con->ops->put(msg->con); | |
3005 | ||
3006 | msg->con = con ? con->ops->get(con) : NULL; | |
3007 | BUG_ON(msg->con != con); | |
3008 | } | |
3009 | ||
e00de341 SW |
3010 | static void clear_standby(struct ceph_connection *con) |
3011 | { | |
3012 | /* come back from STANDBY? */ | |
8dacc7da | 3013 | if (con->state == CON_STATE_STANDBY) { |
e00de341 | 3014 | dout("clear_standby %p and ++connect_seq\n", con); |
8dacc7da | 3015 | con->state = CON_STATE_PREOPEN; |
e00de341 | 3016 | con->connect_seq++; |
c9ffc77a AE |
3017 | WARN_ON(con_flag_test(con, CON_FLAG_WRITE_PENDING)); |
3018 | WARN_ON(con_flag_test(con, CON_FLAG_KEEPALIVE_PENDING)); | |
e00de341 SW |
3019 | } |
3020 | } | |
3021 | ||
31b8006e SW |
3022 | /* |
3023 | * Queue up an outgoing message on the given connection. | |
3024 | */ | |
3025 | void ceph_con_send(struct ceph_connection *con, struct ceph_msg *msg) | |
3026 | { | |
31b8006e | 3027 | /* set src+dst */ |
dbad185d | 3028 | msg->hdr.src = con->msgr->inst.name; |
3ca02ef9 | 3029 | BUG_ON(msg->front.iov_len != le32_to_cpu(msg->hdr.front_len)); |
e84346b7 SW |
3030 | msg->needs_out_seq = true; |
3031 | ||
ec302645 | 3032 | mutex_lock(&con->mutex); |
92ce034b | 3033 | |
8dacc7da | 3034 | if (con->state == CON_STATE_CLOSED) { |
a59b55a6 SW |
3035 | dout("con_send %p closed, dropping %p\n", con, msg); |
3036 | ceph_msg_put(msg); | |
3037 | mutex_unlock(&con->mutex); | |
3038 | return; | |
3039 | } | |
3040 | ||
583d0fef | 3041 | msg_con_set(msg, con); |
92ce034b | 3042 | |
31b8006e SW |
3043 | BUG_ON(!list_empty(&msg->list_head)); |
3044 | list_add_tail(&msg->list_head, &con->out_queue); | |
3045 | dout("----- %p to %s%lld %d=%s len %d+%d+%d -----\n", msg, | |
3046 | ENTITY_NAME(con->peer_name), le16_to_cpu(msg->hdr.type), | |
3047 | ceph_msg_type_name(le16_to_cpu(msg->hdr.type)), | |
3048 | le32_to_cpu(msg->hdr.front_len), | |
3049 | le32_to_cpu(msg->hdr.middle_len), | |
3050 | le32_to_cpu(msg->hdr.data_len)); | |
00650931 SW |
3051 | |
3052 | clear_standby(con); | |
ec302645 | 3053 | mutex_unlock(&con->mutex); |
31b8006e SW |
3054 | |
3055 | /* if there wasn't anything waiting to send before, queue | |
3056 | * new work */ | |
c9ffc77a | 3057 | if (con_flag_test_and_set(con, CON_FLAG_WRITE_PENDING) == 0) |
31b8006e SW |
3058 | queue_con(con); |
3059 | } | |
3d14c5d2 | 3060 | EXPORT_SYMBOL(ceph_con_send); |
31b8006e SW |
3061 | |
3062 | /* | |
3063 | * Revoke a message that was previously queued for send | |
3064 | */ | |
6740a845 | 3065 | void ceph_msg_revoke(struct ceph_msg *msg) |
31b8006e | 3066 | { |
6740a845 AE |
3067 | struct ceph_connection *con = msg->con; |
3068 | ||
583d0fef ID |
3069 | if (!con) { |
3070 | dout("%s msg %p null con\n", __func__, msg); | |
6740a845 | 3071 | return; /* Message not in our possession */ |
583d0fef | 3072 | } |
6740a845 | 3073 | |
ec302645 | 3074 | mutex_lock(&con->mutex); |
31b8006e | 3075 | if (!list_empty(&msg->list_head)) { |
38941f80 | 3076 | dout("%s %p msg %p - was on queue\n", __func__, con, msg); |
31b8006e | 3077 | list_del_init(&msg->list_head); |
31b8006e | 3078 | msg->hdr.seq = 0; |
38941f80 | 3079 | |
31b8006e | 3080 | ceph_msg_put(msg); |
ed98adad SW |
3081 | } |
3082 | if (con->out_msg == msg) { | |
67645d76 ID |
3083 | BUG_ON(con->out_skip); |
3084 | /* footer */ | |
3085 | if (con->out_msg_done) { | |
3086 | con->out_skip += con_out_kvec_skip(con); | |
3087 | } else { | |
3088 | BUG_ON(!msg->data_length); | |
89f08173 | 3089 | con->out_skip += sizeof_footer(con); |
31b8006e | 3090 | } |
67645d76 ID |
3091 | /* data, middle, front */ |
3092 | if (msg->data_length) | |
3093 | con->out_skip += msg->cursor.total_resid; | |
3094 | if (msg->middle) | |
3095 | con->out_skip += con_out_kvec_skip(con); | |
3096 | con->out_skip += con_out_kvec_skip(con); | |
3097 | ||
3098 | dout("%s %p msg %p - was sending, will write %d skip %d\n", | |
3099 | __func__, con, msg, con->out_kvec_bytes, con->out_skip); | |
ed98adad | 3100 | msg->hdr.seq = 0; |
67645d76 | 3101 | con->out_msg = NULL; |
92ce034b | 3102 | ceph_msg_put(msg); |
31b8006e | 3103 | } |
67645d76 | 3104 | |
ec302645 | 3105 | mutex_unlock(&con->mutex); |
31b8006e SW |
3106 | } |
3107 | ||
350b1c32 | 3108 | /* |
0d59ab81 | 3109 | * Revoke a message that we may be reading data into |
350b1c32 | 3110 | */ |
8921d114 | 3111 | void ceph_msg_revoke_incoming(struct ceph_msg *msg) |
350b1c32 | 3112 | { |
583d0fef | 3113 | struct ceph_connection *con = msg->con; |
8921d114 | 3114 | |
583d0fef | 3115 | if (!con) { |
8921d114 | 3116 | dout("%s msg %p null con\n", __func__, msg); |
8921d114 AE |
3117 | return; /* Message not in our possession */ |
3118 | } | |
3119 | ||
350b1c32 | 3120 | mutex_lock(&con->mutex); |
8921d114 | 3121 | if (con->in_msg == msg) { |
95c96174 ED |
3122 | unsigned int front_len = le32_to_cpu(con->in_hdr.front_len); |
3123 | unsigned int middle_len = le32_to_cpu(con->in_hdr.middle_len); | |
3124 | unsigned int data_len = le32_to_cpu(con->in_hdr.data_len); | |
350b1c32 SW |
3125 | |
3126 | /* skip rest of message */ | |
8921d114 AE |
3127 | dout("%s %p msg %p revoked\n", __func__, con, msg); |
3128 | con->in_base_pos = con->in_base_pos - | |
350b1c32 | 3129 | sizeof(struct ceph_msg_header) - |
0d59ab81 YS |
3130 | front_len - |
3131 | middle_len - | |
3132 | data_len - | |
350b1c32 | 3133 | sizeof(struct ceph_msg_footer); |
350b1c32 SW |
3134 | ceph_msg_put(con->in_msg); |
3135 | con->in_msg = NULL; | |
3136 | con->in_tag = CEPH_MSGR_TAG_READY; | |
684be25c | 3137 | con->in_seq++; |
350b1c32 | 3138 | } else { |
8921d114 AE |
3139 | dout("%s %p in_msg %p msg %p no-op\n", |
3140 | __func__, con, con->in_msg, msg); | |
350b1c32 SW |
3141 | } |
3142 | mutex_unlock(&con->mutex); | |
3143 | } | |
3144 | ||
31b8006e SW |
3145 | /* |
3146 | * Queue a keepalive byte to ensure the tcp connection is alive. | |
3147 | */ | |
3148 | void ceph_con_keepalive(struct ceph_connection *con) | |
3149 | { | |
e00de341 | 3150 | dout("con_keepalive %p\n", con); |
00650931 | 3151 | mutex_lock(&con->mutex); |
e00de341 | 3152 | clear_standby(con); |
00650931 | 3153 | mutex_unlock(&con->mutex); |
c9ffc77a AE |
3154 | if (con_flag_test_and_set(con, CON_FLAG_KEEPALIVE_PENDING) == 0 && |
3155 | con_flag_test_and_set(con, CON_FLAG_WRITE_PENDING) == 0) | |
31b8006e SW |
3156 | queue_con(con); |
3157 | } | |
3d14c5d2 | 3158 | EXPORT_SYMBOL(ceph_con_keepalive); |
31b8006e | 3159 | |
8b9558aa YZ |
3160 | bool ceph_con_keepalive_expired(struct ceph_connection *con, |
3161 | unsigned long interval) | |
3162 | { | |
3163 | if (interval > 0 && | |
3164 | (con->peer_features & CEPH_FEATURE_MSGR_KEEPALIVE2)) { | |
3165 | struct timespec now = CURRENT_TIME; | |
3166 | struct timespec ts; | |
3167 | jiffies_to_timespec(interval, &ts); | |
3168 | ts = timespec_add(con->last_keepalive_ack, ts); | |
3169 | return timespec_compare(&now, &ts) >= 0; | |
3170 | } | |
3171 | return false; | |
3172 | } | |
3173 | ||
6644ed7b | 3174 | static struct ceph_msg_data *ceph_msg_data_create(enum ceph_msg_data_type type) |
43794509 | 3175 | { |
6644ed7b AE |
3176 | struct ceph_msg_data *data; |
3177 | ||
3178 | if (WARN_ON(!ceph_msg_data_type_valid(type))) | |
3179 | return NULL; | |
3180 | ||
81b36be4 | 3181 | data = kmem_cache_zalloc(ceph_msg_data_cache, GFP_NOFS); |
6644ed7b AE |
3182 | if (data) |
3183 | data->type = type; | |
5240d9f9 | 3184 | INIT_LIST_HEAD(&data->links); |
6644ed7b AE |
3185 | |
3186 | return data; | |
3187 | } | |
3188 | ||
3189 | static void ceph_msg_data_destroy(struct ceph_msg_data *data) | |
3190 | { | |
3191 | if (!data) | |
3192 | return; | |
3193 | ||
5240d9f9 | 3194 | WARN_ON(!list_empty(&data->links)); |
e4339d28 | 3195 | if (data->type == CEPH_MSG_DATA_PAGELIST) |
6644ed7b | 3196 | ceph_pagelist_release(data->pagelist); |
81b36be4 | 3197 | kmem_cache_free(ceph_msg_data_cache, data); |
43794509 AE |
3198 | } |
3199 | ||
90af3602 | 3200 | void ceph_msg_data_add_pages(struct ceph_msg *msg, struct page **pages, |
f1baeb2b | 3201 | size_t length, size_t alignment) |
02afca6c | 3202 | { |
6644ed7b AE |
3203 | struct ceph_msg_data *data; |
3204 | ||
07aa1558 AE |
3205 | BUG_ON(!pages); |
3206 | BUG_ON(!length); | |
6644ed7b AE |
3207 | |
3208 | data = ceph_msg_data_create(CEPH_MSG_DATA_PAGES); | |
3209 | BUG_ON(!data); | |
3210 | data->pages = pages; | |
3211 | data->length = length; | |
3212 | data->alignment = alignment & ~PAGE_MASK; | |
02afca6c | 3213 | |
5240d9f9 AE |
3214 | list_add_tail(&data->links, &msg->data); |
3215 | msg->data_length += length; | |
02afca6c | 3216 | } |
90af3602 | 3217 | EXPORT_SYMBOL(ceph_msg_data_add_pages); |
31b8006e | 3218 | |
90af3602 | 3219 | void ceph_msg_data_add_pagelist(struct ceph_msg *msg, |
27fa8385 AE |
3220 | struct ceph_pagelist *pagelist) |
3221 | { | |
6644ed7b AE |
3222 | struct ceph_msg_data *data; |
3223 | ||
07aa1558 AE |
3224 | BUG_ON(!pagelist); |
3225 | BUG_ON(!pagelist->length); | |
27fa8385 | 3226 | |
6644ed7b AE |
3227 | data = ceph_msg_data_create(CEPH_MSG_DATA_PAGELIST); |
3228 | BUG_ON(!data); | |
3229 | data->pagelist = pagelist; | |
3230 | ||
5240d9f9 AE |
3231 | list_add_tail(&data->links, &msg->data); |
3232 | msg->data_length += pagelist->length; | |
27fa8385 | 3233 | } |
90af3602 | 3234 | EXPORT_SYMBOL(ceph_msg_data_add_pagelist); |
27fa8385 | 3235 | |
ea96571f | 3236 | #ifdef CONFIG_BLOCK |
90af3602 | 3237 | void ceph_msg_data_add_bio(struct ceph_msg *msg, struct bio *bio, |
a1930804 | 3238 | size_t length) |
27fa8385 | 3239 | { |
6644ed7b AE |
3240 | struct ceph_msg_data *data; |
3241 | ||
07aa1558 | 3242 | BUG_ON(!bio); |
27fa8385 | 3243 | |
6644ed7b AE |
3244 | data = ceph_msg_data_create(CEPH_MSG_DATA_BIO); |
3245 | BUG_ON(!data); | |
3246 | data->bio = bio; | |
c851c495 | 3247 | data->bio_length = length; |
6644ed7b | 3248 | |
5240d9f9 AE |
3249 | list_add_tail(&data->links, &msg->data); |
3250 | msg->data_length += length; | |
27fa8385 | 3251 | } |
90af3602 | 3252 | EXPORT_SYMBOL(ceph_msg_data_add_bio); |
ea96571f | 3253 | #endif /* CONFIG_BLOCK */ |
27fa8385 | 3254 | |
31b8006e SW |
3255 | /* |
3256 | * construct a new message with given type, size | |
3257 | * the new msg has a ref count of 1. | |
3258 | */ | |
b61c2763 SW |
3259 | struct ceph_msg *ceph_msg_new(int type, int front_len, gfp_t flags, |
3260 | bool can_fail) | |
31b8006e SW |
3261 | { |
3262 | struct ceph_msg *m; | |
3263 | ||
e3d5d638 | 3264 | m = kmem_cache_zalloc(ceph_msg_cache, flags); |
31b8006e SW |
3265 | if (m == NULL) |
3266 | goto out; | |
31b8006e SW |
3267 | |
3268 | m->hdr.type = cpu_to_le16(type); | |
45c6ceb5 | 3269 | m->hdr.priority = cpu_to_le16(CEPH_MSG_PRIO_DEFAULT); |
31b8006e | 3270 | m->hdr.front_len = cpu_to_le32(front_len); |
ca20892d | 3271 | |
9516e45b AE |
3272 | INIT_LIST_HEAD(&m->list_head); |
3273 | kref_init(&m->kref); | |
5240d9f9 | 3274 | INIT_LIST_HEAD(&m->data); |
ca20892d | 3275 | |
31b8006e SW |
3276 | /* front */ |
3277 | if (front_len) { | |
eeb0bed5 | 3278 | m->front.iov_base = ceph_kvmalloc(front_len, flags); |
31b8006e | 3279 | if (m->front.iov_base == NULL) { |
b61c2763 | 3280 | dout("ceph_msg_new can't allocate %d bytes\n", |
31b8006e SW |
3281 | front_len); |
3282 | goto out2; | |
3283 | } | |
3284 | } else { | |
3285 | m->front.iov_base = NULL; | |
3286 | } | |
f2be82b0 | 3287 | m->front_alloc_len = m->front.iov_len = front_len; |
31b8006e | 3288 | |
bb257664 | 3289 | dout("ceph_msg_new %p front %d\n", m, front_len); |
31b8006e SW |
3290 | return m; |
3291 | ||
3292 | out2: | |
3293 | ceph_msg_put(m); | |
3294 | out: | |
b61c2763 SW |
3295 | if (!can_fail) { |
3296 | pr_err("msg_new can't create type %d front %d\n", type, | |
3297 | front_len); | |
f0ed1b7c | 3298 | WARN_ON(1); |
b61c2763 SW |
3299 | } else { |
3300 | dout("msg_new can't create type %d front %d\n", type, | |
3301 | front_len); | |
3302 | } | |
a79832f2 | 3303 | return NULL; |
31b8006e | 3304 | } |
3d14c5d2 | 3305 | EXPORT_SYMBOL(ceph_msg_new); |
31b8006e | 3306 | |
31b8006e SW |
3307 | /* |
3308 | * Allocate "middle" portion of a message, if it is needed and wasn't | |
3309 | * allocated by alloc_msg. This allows us to read a small fixed-size | |
3310 | * per-type header in the front and then gracefully fail (i.e., | |
3311 | * propagate the error to the caller based on info in the front) when | |
3312 | * the middle is too large. | |
3313 | */ | |
2450418c | 3314 | static int ceph_alloc_middle(struct ceph_connection *con, struct ceph_msg *msg) |
31b8006e SW |
3315 | { |
3316 | int type = le16_to_cpu(msg->hdr.type); | |
3317 | int middle_len = le32_to_cpu(msg->hdr.middle_len); | |
3318 | ||
3319 | dout("alloc_middle %p type %d %s middle_len %d\n", msg, type, | |
3320 | ceph_msg_type_name(type), middle_len); | |
3321 | BUG_ON(!middle_len); | |
3322 | BUG_ON(msg->middle); | |
3323 | ||
b6c1d5b8 | 3324 | msg->middle = ceph_buffer_new(middle_len, GFP_NOFS); |
31b8006e SW |
3325 | if (!msg->middle) |
3326 | return -ENOMEM; | |
3327 | return 0; | |
3328 | } | |
3329 | ||
2450418c | 3330 | /* |
1c20f2d2 AE |
3331 | * Allocate a message for receiving an incoming message on a |
3332 | * connection, and save the result in con->in_msg. Uses the | |
3333 | * connection's private alloc_msg op if available. | |
3334 | * | |
4740a623 SW |
3335 | * Returns 0 on success, or a negative error code. |
3336 | * | |
3337 | * On success, if we set *skip = 1: | |
3338 | * - the next message should be skipped and ignored. | |
3339 | * - con->in_msg == NULL | |
3340 | * or if we set *skip = 0: | |
3341 | * - con->in_msg is non-null. | |
3342 | * On error (ENOMEM, EAGAIN, ...), | |
3343 | * - con->in_msg == NULL | |
2450418c | 3344 | */ |
4740a623 | 3345 | static int ceph_con_in_msg_alloc(struct ceph_connection *con, int *skip) |
2450418c | 3346 | { |
4740a623 | 3347 | struct ceph_msg_header *hdr = &con->in_hdr; |
2450418c | 3348 | int middle_len = le32_to_cpu(hdr->middle_len); |
1d866d1c | 3349 | struct ceph_msg *msg; |
4740a623 | 3350 | int ret = 0; |
2450418c | 3351 | |
1c20f2d2 | 3352 | BUG_ON(con->in_msg != NULL); |
53ded495 | 3353 | BUG_ON(!con->ops->alloc_msg); |
2450418c | 3354 | |
53ded495 AE |
3355 | mutex_unlock(&con->mutex); |
3356 | msg = con->ops->alloc_msg(con, hdr, skip); | |
3357 | mutex_lock(&con->mutex); | |
3358 | if (con->state != CON_STATE_OPEN) { | |
3359 | if (msg) | |
1d866d1c | 3360 | ceph_msg_put(msg); |
53ded495 AE |
3361 | return -EAGAIN; |
3362 | } | |
4137577a AE |
3363 | if (msg) { |
3364 | BUG_ON(*skip); | |
583d0fef | 3365 | msg_con_set(msg, con); |
4137577a | 3366 | con->in_msg = msg; |
4137577a AE |
3367 | } else { |
3368 | /* | |
3369 | * Null message pointer means either we should skip | |
3370 | * this message or we couldn't allocate memory. The | |
3371 | * former is not an error. | |
3372 | */ | |
3373 | if (*skip) | |
3374 | return 0; | |
4137577a | 3375 | |
67c64eb7 | 3376 | con->error_msg = "error allocating memory for incoming message"; |
53ded495 | 3377 | return -ENOMEM; |
2450418c | 3378 | } |
1c20f2d2 | 3379 | memcpy(&con->in_msg->hdr, &con->in_hdr, sizeof(con->in_hdr)); |
2450418c | 3380 | |
1c20f2d2 AE |
3381 | if (middle_len && !con->in_msg->middle) { |
3382 | ret = ceph_alloc_middle(con, con->in_msg); | |
2450418c | 3383 | if (ret < 0) { |
1c20f2d2 AE |
3384 | ceph_msg_put(con->in_msg); |
3385 | con->in_msg = NULL; | |
2450418c YS |
3386 | } |
3387 | } | |
9d7f0f13 | 3388 | |
4740a623 | 3389 | return ret; |
2450418c YS |
3390 | } |
3391 | ||
31b8006e SW |
3392 | |
3393 | /* | |
3394 | * Free a generically kmalloc'd message. | |
3395 | */ | |
0215e44b | 3396 | static void ceph_msg_free(struct ceph_msg *m) |
31b8006e | 3397 | { |
0215e44b | 3398 | dout("%s %p\n", __func__, m); |
4965fc38 | 3399 | kvfree(m->front.iov_base); |
e3d5d638 | 3400 | kmem_cache_free(ceph_msg_cache, m); |
31b8006e SW |
3401 | } |
3402 | ||
0215e44b | 3403 | static void ceph_msg_release(struct kref *kref) |
c2e552e7 SW |
3404 | { |
3405 | struct ceph_msg *m = container_of(kref, struct ceph_msg, kref); | |
10bcee14 | 3406 | struct ceph_msg_data *data, *next; |
31b8006e | 3407 | |
0215e44b | 3408 | dout("%s %p\n", __func__, m); |
c2e552e7 SW |
3409 | WARN_ON(!list_empty(&m->list_head)); |
3410 | ||
583d0fef ID |
3411 | msg_con_set(m, NULL); |
3412 | ||
c2e552e7 SW |
3413 | /* drop middle, data, if any */ |
3414 | if (m->middle) { | |
3415 | ceph_buffer_put(m->middle); | |
3416 | m->middle = NULL; | |
31b8006e | 3417 | } |
5240d9f9 | 3418 | |
10bcee14 GT |
3419 | list_for_each_entry_safe(data, next, &m->data, links) { |
3420 | list_del_init(&data->links); | |
5240d9f9 AE |
3421 | ceph_msg_data_destroy(data); |
3422 | } | |
a1930804 | 3423 | m->data_length = 0; |
58bb3b37 | 3424 | |
c2e552e7 SW |
3425 | if (m->pool) |
3426 | ceph_msgpool_put(m->pool, m); | |
3427 | else | |
0215e44b ID |
3428 | ceph_msg_free(m); |
3429 | } | |
3430 | ||
3431 | struct ceph_msg *ceph_msg_get(struct ceph_msg *msg) | |
3432 | { | |
3433 | dout("%s %p (was %d)\n", __func__, msg, | |
3434 | atomic_read(&msg->kref.refcount)); | |
3435 | kref_get(&msg->kref); | |
3436 | return msg; | |
3437 | } | |
3438 | EXPORT_SYMBOL(ceph_msg_get); | |
3439 | ||
3440 | void ceph_msg_put(struct ceph_msg *msg) | |
3441 | { | |
3442 | dout("%s %p (was %d)\n", __func__, msg, | |
3443 | atomic_read(&msg->kref.refcount)); | |
3444 | kref_put(&msg->kref, ceph_msg_release); | |
31b8006e | 3445 | } |
0215e44b | 3446 | EXPORT_SYMBOL(ceph_msg_put); |
9ec7cab1 SW |
3447 | |
3448 | void ceph_msg_dump(struct ceph_msg *msg) | |
3449 | { | |
3cea4c30 ID |
3450 | pr_debug("msg_dump %p (front_alloc_len %d length %zd)\n", msg, |
3451 | msg->front_alloc_len, msg->data_length); | |
9ec7cab1 SW |
3452 | print_hex_dump(KERN_DEBUG, "header: ", |
3453 | DUMP_PREFIX_OFFSET, 16, 1, | |
3454 | &msg->hdr, sizeof(msg->hdr), true); | |
3455 | print_hex_dump(KERN_DEBUG, " front: ", | |
3456 | DUMP_PREFIX_OFFSET, 16, 1, | |
3457 | msg->front.iov_base, msg->front.iov_len, true); | |
3458 | if (msg->middle) | |
3459 | print_hex_dump(KERN_DEBUG, "middle: ", | |
3460 | DUMP_PREFIX_OFFSET, 16, 1, | |
3461 | msg->middle->vec.iov_base, | |
3462 | msg->middle->vec.iov_len, true); | |
3463 | print_hex_dump(KERN_DEBUG, "footer: ", | |
3464 | DUMP_PREFIX_OFFSET, 16, 1, | |
3465 | &msg->footer, sizeof(msg->footer), true); | |
3466 | } | |
3d14c5d2 | 3467 | EXPORT_SYMBOL(ceph_msg_dump); |