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Commit | Line | Data |
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a246b010 CL |
1 | /* |
2 | * linux/net/sunrpc/xprtsock.c | |
3 | * | |
4 | * Client-side transport implementation for sockets. | |
5 | * | |
6 | * TCP callback races fixes (C) 1998 Red Hat Software <alan@redhat.com> | |
7 | * TCP send fixes (C) 1998 Red Hat Software <alan@redhat.com> | |
8 | * TCP NFS related read + write fixes | |
9 | * (C) 1999 Dave Airlie, University of Limerick, Ireland <airlied@linux.ie> | |
10 | * | |
11 | * Rewrite of larges part of the code in order to stabilize TCP stuff. | |
12 | * Fix behaviour when socket buffer is full. | |
13 | * (C) 1999 Trond Myklebust <trond.myklebust@fys.uio.no> | |
55aa4f58 CL |
14 | * |
15 | * IP socket transport implementation, (C) 2005 Chuck Lever <cel@netapp.com> | |
a246b010 CL |
16 | */ |
17 | ||
18 | #include <linux/types.h> | |
19 | #include <linux/slab.h> | |
20 | #include <linux/capability.h> | |
21 | #include <linux/sched.h> | |
22 | #include <linux/pagemap.h> | |
23 | #include <linux/errno.h> | |
24 | #include <linux/socket.h> | |
25 | #include <linux/in.h> | |
26 | #include <linux/net.h> | |
27 | #include <linux/mm.h> | |
28 | #include <linux/udp.h> | |
29 | #include <linux/tcp.h> | |
30 | #include <linux/sunrpc/clnt.h> | |
02107148 | 31 | #include <linux/sunrpc/sched.h> |
a246b010 CL |
32 | #include <linux/file.h> |
33 | ||
34 | #include <net/sock.h> | |
35 | #include <net/checksum.h> | |
36 | #include <net/udp.h> | |
37 | #include <net/tcp.h> | |
38 | ||
c556b754 CL |
39 | /* |
40 | * xprtsock tunables | |
41 | */ | |
42 | unsigned int xprt_udp_slot_table_entries = RPC_DEF_SLOT_TABLE; | |
43 | unsigned int xprt_tcp_slot_table_entries = RPC_DEF_SLOT_TABLE; | |
44 | ||
45 | unsigned int xprt_min_resvport = RPC_DEF_MIN_RESVPORT; | |
46 | unsigned int xprt_max_resvport = RPC_DEF_MAX_RESVPORT; | |
47 | ||
262965f5 CL |
48 | /* |
49 | * How many times to try sending a request on a socket before waiting | |
50 | * for the socket buffer to clear. | |
51 | */ | |
52 | #define XS_SENDMSG_RETRY (10U) | |
53 | ||
03bf4b70 CL |
54 | /* |
55 | * Time out for an RPC UDP socket connect. UDP socket connects are | |
56 | * synchronous, but we set a timeout anyway in case of resource | |
57 | * exhaustion on the local host. | |
58 | */ | |
59 | #define XS_UDP_CONN_TO (5U * HZ) | |
60 | ||
61 | /* | |
62 | * Wait duration for an RPC TCP connection to be established. Solaris | |
63 | * NFS over TCP uses 60 seconds, for example, which is in line with how | |
64 | * long a server takes to reboot. | |
65 | */ | |
66 | #define XS_TCP_CONN_TO (60U * HZ) | |
67 | ||
68 | /* | |
69 | * Wait duration for a reply from the RPC portmapper. | |
70 | */ | |
71 | #define XS_BIND_TO (60U * HZ) | |
72 | ||
73 | /* | |
74 | * Delay if a UDP socket connect error occurs. This is most likely some | |
75 | * kind of resource problem on the local host. | |
76 | */ | |
77 | #define XS_UDP_REEST_TO (2U * HZ) | |
78 | ||
79 | /* | |
80 | * The reestablish timeout allows clients to delay for a bit before attempting | |
81 | * to reconnect to a server that just dropped our connection. | |
82 | * | |
83 | * We implement an exponential backoff when trying to reestablish a TCP | |
84 | * transport connection with the server. Some servers like to drop a TCP | |
85 | * connection when they are overworked, so we start with a short timeout and | |
86 | * increase over time if the server is down or not responding. | |
87 | */ | |
88 | #define XS_TCP_INIT_REEST_TO (3U * HZ) | |
89 | #define XS_TCP_MAX_REEST_TO (5U * 60 * HZ) | |
90 | ||
91 | /* | |
92 | * TCP idle timeout; client drops the transport socket if it is idle | |
93 | * for this long. Note that we also timeout UDP sockets to prevent | |
94 | * holding port numbers when there is no RPC traffic. | |
95 | */ | |
96 | #define XS_IDLE_DISC_TO (5U * 60 * HZ) | |
97 | ||
a246b010 CL |
98 | #ifdef RPC_DEBUG |
99 | # undef RPC_DEBUG_DATA | |
9903cd1c | 100 | # define RPCDBG_FACILITY RPCDBG_TRANS |
a246b010 CL |
101 | #endif |
102 | ||
a246b010 | 103 | #ifdef RPC_DEBUG_DATA |
9903cd1c | 104 | static void xs_pktdump(char *msg, u32 *packet, unsigned int count) |
a246b010 | 105 | { |
9903cd1c CL |
106 | u8 *buf = (u8 *) packet; |
107 | int j; | |
a246b010 CL |
108 | |
109 | dprintk("RPC: %s\n", msg); | |
110 | for (j = 0; j < count && j < 128; j += 4) { | |
111 | if (!(j & 31)) { | |
112 | if (j) | |
113 | dprintk("\n"); | |
114 | dprintk("0x%04x ", j); | |
115 | } | |
116 | dprintk("%02x%02x%02x%02x ", | |
117 | buf[j], buf[j+1], buf[j+2], buf[j+3]); | |
118 | } | |
119 | dprintk("\n"); | |
120 | } | |
121 | #else | |
9903cd1c | 122 | static inline void xs_pktdump(char *msg, u32 *packet, unsigned int count) |
a246b010 CL |
123 | { |
124 | /* NOP */ | |
125 | } | |
126 | #endif | |
127 | ||
ffc2e518 CL |
128 | struct sock_xprt { |
129 | struct rpc_xprt xprt; | |
ee0ac0c2 CL |
130 | |
131 | /* | |
132 | * Network layer | |
133 | */ | |
134 | struct socket * sock; | |
135 | struct sock * inet; | |
51971139 CL |
136 | |
137 | /* | |
138 | * State of TCP reply receive | |
139 | */ | |
140 | __be32 tcp_fraghdr, | |
141 | tcp_xid; | |
142 | ||
143 | u32 tcp_offset, | |
144 | tcp_reclen; | |
145 | ||
146 | unsigned long tcp_copied, | |
147 | tcp_flags; | |
ffc2e518 CL |
148 | }; |
149 | ||
edb267a6 CL |
150 | static void xs_format_peer_addresses(struct rpc_xprt *xprt) |
151 | { | |
152 | struct sockaddr_in *addr = (struct sockaddr_in *) &xprt->addr; | |
153 | char *buf; | |
154 | ||
155 | buf = kzalloc(20, GFP_KERNEL); | |
156 | if (buf) { | |
157 | snprintf(buf, 20, "%u.%u.%u.%u", | |
158 | NIPQUAD(addr->sin_addr.s_addr)); | |
159 | } | |
160 | xprt->address_strings[RPC_DISPLAY_ADDR] = buf; | |
161 | ||
162 | buf = kzalloc(8, GFP_KERNEL); | |
163 | if (buf) { | |
164 | snprintf(buf, 8, "%u", | |
165 | ntohs(addr->sin_port)); | |
166 | } | |
167 | xprt->address_strings[RPC_DISPLAY_PORT] = buf; | |
168 | ||
169 | if (xprt->prot == IPPROTO_UDP) | |
170 | xprt->address_strings[RPC_DISPLAY_PROTO] = "udp"; | |
171 | else | |
172 | xprt->address_strings[RPC_DISPLAY_PROTO] = "tcp"; | |
173 | ||
174 | buf = kzalloc(48, GFP_KERNEL); | |
175 | if (buf) { | |
176 | snprintf(buf, 48, "addr=%u.%u.%u.%u port=%u proto=%s", | |
177 | NIPQUAD(addr->sin_addr.s_addr), | |
178 | ntohs(addr->sin_port), | |
179 | xprt->prot == IPPROTO_UDP ? "udp" : "tcp"); | |
180 | } | |
181 | xprt->address_strings[RPC_DISPLAY_ALL] = buf; | |
182 | } | |
183 | ||
184 | static void xs_free_peer_addresses(struct rpc_xprt *xprt) | |
185 | { | |
186 | kfree(xprt->address_strings[RPC_DISPLAY_ADDR]); | |
187 | kfree(xprt->address_strings[RPC_DISPLAY_PORT]); | |
188 | kfree(xprt->address_strings[RPC_DISPLAY_ALL]); | |
189 | } | |
190 | ||
b4b5cc85 CL |
191 | #define XS_SENDMSG_FLAGS (MSG_DONTWAIT | MSG_NOSIGNAL) |
192 | ||
24c5684b | 193 | static int xs_send_kvec(struct socket *sock, struct sockaddr *addr, int addrlen, struct kvec *vec, unsigned int base, int more) |
b4b5cc85 | 194 | { |
b4b5cc85 CL |
195 | struct msghdr msg = { |
196 | .msg_name = addr, | |
197 | .msg_namelen = addrlen, | |
24c5684b TM |
198 | .msg_flags = XS_SENDMSG_FLAGS | (more ? MSG_MORE : 0), |
199 | }; | |
200 | struct kvec iov = { | |
201 | .iov_base = vec->iov_base + base, | |
202 | .iov_len = vec->iov_len - base, | |
b4b5cc85 CL |
203 | }; |
204 | ||
24c5684b | 205 | if (iov.iov_len != 0) |
b4b5cc85 CL |
206 | return kernel_sendmsg(sock, &msg, &iov, 1, iov.iov_len); |
207 | return kernel_sendmsg(sock, &msg, NULL, 0, 0); | |
208 | } | |
209 | ||
24c5684b | 210 | static int xs_send_pagedata(struct socket *sock, struct xdr_buf *xdr, unsigned int base, int more) |
b4b5cc85 | 211 | { |
24c5684b TM |
212 | struct page **ppage; |
213 | unsigned int remainder; | |
214 | int err, sent = 0; | |
215 | ||
216 | remainder = xdr->page_len - base; | |
217 | base += xdr->page_base; | |
218 | ppage = xdr->pages + (base >> PAGE_SHIFT); | |
219 | base &= ~PAGE_MASK; | |
220 | for(;;) { | |
221 | unsigned int len = min_t(unsigned int, PAGE_SIZE - base, remainder); | |
222 | int flags = XS_SENDMSG_FLAGS; | |
b4b5cc85 | 223 | |
24c5684b TM |
224 | remainder -= len; |
225 | if (remainder != 0 || more) | |
226 | flags |= MSG_MORE; | |
227 | err = sock->ops->sendpage(sock, *ppage, base, len, flags); | |
228 | if (remainder == 0 || err != len) | |
229 | break; | |
230 | sent += err; | |
231 | ppage++; | |
232 | base = 0; | |
233 | } | |
234 | if (sent == 0) | |
235 | return err; | |
236 | if (err > 0) | |
237 | sent += err; | |
238 | return sent; | |
b4b5cc85 CL |
239 | } |
240 | ||
9903cd1c CL |
241 | /** |
242 | * xs_sendpages - write pages directly to a socket | |
243 | * @sock: socket to send on | |
244 | * @addr: UDP only -- address of destination | |
245 | * @addrlen: UDP only -- length of destination address | |
246 | * @xdr: buffer containing this request | |
247 | * @base: starting position in the buffer | |
248 | * | |
a246b010 | 249 | */ |
24c5684b | 250 | static int xs_sendpages(struct socket *sock, struct sockaddr *addr, int addrlen, struct xdr_buf *xdr, unsigned int base) |
a246b010 | 251 | { |
24c5684b TM |
252 | unsigned int remainder = xdr->len - base; |
253 | int err, sent = 0; | |
a246b010 | 254 | |
262965f5 CL |
255 | if (unlikely(!sock)) |
256 | return -ENOTCONN; | |
257 | ||
258 | clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags); | |
24c5684b TM |
259 | if (base != 0) { |
260 | addr = NULL; | |
261 | addrlen = 0; | |
262 | } | |
262965f5 | 263 | |
24c5684b TM |
264 | if (base < xdr->head[0].iov_len || addr != NULL) { |
265 | unsigned int len = xdr->head[0].iov_len - base; | |
266 | remainder -= len; | |
267 | err = xs_send_kvec(sock, addr, addrlen, &xdr->head[0], base, remainder != 0); | |
268 | if (remainder == 0 || err != len) | |
a246b010 | 269 | goto out; |
24c5684b | 270 | sent += err; |
a246b010 CL |
271 | base = 0; |
272 | } else | |
24c5684b | 273 | base -= xdr->head[0].iov_len; |
a246b010 | 274 | |
24c5684b TM |
275 | if (base < xdr->page_len) { |
276 | unsigned int len = xdr->page_len - base; | |
277 | remainder -= len; | |
278 | err = xs_send_pagedata(sock, xdr, base, remainder != 0); | |
279 | if (remainder == 0 || err != len) | |
a246b010 | 280 | goto out; |
24c5684b | 281 | sent += err; |
a246b010 | 282 | base = 0; |
24c5684b TM |
283 | } else |
284 | base -= xdr->page_len; | |
285 | ||
286 | if (base >= xdr->tail[0].iov_len) | |
287 | return sent; | |
288 | err = xs_send_kvec(sock, NULL, 0, &xdr->tail[0], base, 0); | |
a246b010 | 289 | out: |
24c5684b TM |
290 | if (sent == 0) |
291 | return err; | |
292 | if (err > 0) | |
293 | sent += err; | |
294 | return sent; | |
a246b010 CL |
295 | } |
296 | ||
9903cd1c | 297 | /** |
262965f5 CL |
298 | * xs_nospace - place task on wait queue if transmit was incomplete |
299 | * @task: task to put to sleep | |
9903cd1c | 300 | * |
a246b010 | 301 | */ |
262965f5 | 302 | static void xs_nospace(struct rpc_task *task) |
a246b010 | 303 | { |
262965f5 CL |
304 | struct rpc_rqst *req = task->tk_rqstp; |
305 | struct rpc_xprt *xprt = req->rq_xprt; | |
ee0ac0c2 | 306 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
a246b010 | 307 | |
262965f5 CL |
308 | dprintk("RPC: %4d xmit incomplete (%u left of %u)\n", |
309 | task->tk_pid, req->rq_slen - req->rq_bytes_sent, | |
310 | req->rq_slen); | |
311 | ||
ee0ac0c2 | 312 | if (test_bit(SOCK_ASYNC_NOSPACE, &transport->sock->flags)) { |
262965f5 CL |
313 | /* Protect against races with write_space */ |
314 | spin_lock_bh(&xprt->transport_lock); | |
315 | ||
316 | /* Don't race with disconnect */ | |
317 | if (!xprt_connected(xprt)) | |
318 | task->tk_status = -ENOTCONN; | |
ee0ac0c2 | 319 | else if (test_bit(SOCK_NOSPACE, &transport->sock->flags)) |
262965f5 CL |
320 | xprt_wait_for_buffer_space(task); |
321 | ||
322 | spin_unlock_bh(&xprt->transport_lock); | |
323 | } else | |
324 | /* Keep holding the socket if it is blocked */ | |
325 | rpc_delay(task, HZ>>4); | |
326 | } | |
327 | ||
328 | /** | |
329 | * xs_udp_send_request - write an RPC request to a UDP socket | |
330 | * @task: address of RPC task that manages the state of an RPC request | |
331 | * | |
332 | * Return values: | |
333 | * 0: The request has been sent | |
334 | * EAGAIN: The socket was blocked, please call again later to | |
335 | * complete the request | |
336 | * ENOTCONN: Caller needs to invoke connect logic then call again | |
337 | * other: Some other error occured, the request was not sent | |
338 | */ | |
339 | static int xs_udp_send_request(struct rpc_task *task) | |
340 | { | |
341 | struct rpc_rqst *req = task->tk_rqstp; | |
342 | struct rpc_xprt *xprt = req->rq_xprt; | |
ee0ac0c2 | 343 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
262965f5 CL |
344 | struct xdr_buf *xdr = &req->rq_snd_buf; |
345 | int status; | |
a246b010 | 346 | |
9903cd1c | 347 | xs_pktdump("packet data:", |
a246b010 CL |
348 | req->rq_svec->iov_base, |
349 | req->rq_svec->iov_len); | |
350 | ||
262965f5 | 351 | req->rq_xtime = jiffies; |
ee0ac0c2 CL |
352 | status = xs_sendpages(transport->sock, |
353 | (struct sockaddr *) &xprt->addr, | |
354 | xprt->addrlen, xdr, | |
355 | req->rq_bytes_sent); | |
a246b010 | 356 | |
262965f5 CL |
357 | dprintk("RPC: xs_udp_send_request(%u) = %d\n", |
358 | xdr->len - req->rq_bytes_sent, status); | |
a246b010 | 359 | |
262965f5 CL |
360 | if (likely(status >= (int) req->rq_slen)) |
361 | return 0; | |
a246b010 | 362 | |
262965f5 CL |
363 | /* Still some bytes left; set up for a retry later. */ |
364 | if (status > 0) | |
365 | status = -EAGAIN; | |
a246b010 | 366 | |
262965f5 CL |
367 | switch (status) { |
368 | case -ENETUNREACH: | |
369 | case -EPIPE: | |
a246b010 CL |
370 | case -ECONNREFUSED: |
371 | /* When the server has died, an ICMP port unreachable message | |
9903cd1c | 372 | * prompts ECONNREFUSED. */ |
a246b010 | 373 | break; |
262965f5 CL |
374 | case -EAGAIN: |
375 | xs_nospace(task); | |
a246b010 CL |
376 | break; |
377 | default: | |
262965f5 CL |
378 | dprintk("RPC: sendmsg returned unrecognized error %d\n", |
379 | -status); | |
9903cd1c | 380 | break; |
a246b010 | 381 | } |
262965f5 CL |
382 | |
383 | return status; | |
a246b010 CL |
384 | } |
385 | ||
808012fb CL |
386 | static inline void xs_encode_tcp_record_marker(struct xdr_buf *buf) |
387 | { | |
388 | u32 reclen = buf->len - sizeof(rpc_fraghdr); | |
389 | rpc_fraghdr *base = buf->head[0].iov_base; | |
390 | *base = htonl(RPC_LAST_STREAM_FRAGMENT | reclen); | |
391 | } | |
392 | ||
9903cd1c | 393 | /** |
262965f5 | 394 | * xs_tcp_send_request - write an RPC request to a TCP socket |
9903cd1c CL |
395 | * @task: address of RPC task that manages the state of an RPC request |
396 | * | |
397 | * Return values: | |
262965f5 CL |
398 | * 0: The request has been sent |
399 | * EAGAIN: The socket was blocked, please call again later to | |
400 | * complete the request | |
401 | * ENOTCONN: Caller needs to invoke connect logic then call again | |
402 | * other: Some other error occured, the request was not sent | |
9903cd1c CL |
403 | * |
404 | * XXX: In the case of soft timeouts, should we eventually give up | |
262965f5 | 405 | * if sendmsg is not able to make progress? |
9903cd1c | 406 | */ |
262965f5 | 407 | static int xs_tcp_send_request(struct rpc_task *task) |
a246b010 CL |
408 | { |
409 | struct rpc_rqst *req = task->tk_rqstp; | |
410 | struct rpc_xprt *xprt = req->rq_xprt; | |
ee0ac0c2 | 411 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
262965f5 | 412 | struct xdr_buf *xdr = &req->rq_snd_buf; |
a246b010 CL |
413 | int status, retry = 0; |
414 | ||
808012fb | 415 | xs_encode_tcp_record_marker(&req->rq_snd_buf); |
a246b010 | 416 | |
262965f5 CL |
417 | xs_pktdump("packet data:", |
418 | req->rq_svec->iov_base, | |
419 | req->rq_svec->iov_len); | |
a246b010 CL |
420 | |
421 | /* Continue transmitting the packet/record. We must be careful | |
422 | * to cope with writespace callbacks arriving _after_ we have | |
262965f5 | 423 | * called sendmsg(). */ |
a246b010 CL |
424 | while (1) { |
425 | req->rq_xtime = jiffies; | |
ee0ac0c2 CL |
426 | status = xs_sendpages(transport->sock, |
427 | NULL, 0, xdr, req->rq_bytes_sent); | |
a246b010 | 428 | |
262965f5 CL |
429 | dprintk("RPC: xs_tcp_send_request(%u) = %d\n", |
430 | xdr->len - req->rq_bytes_sent, status); | |
a246b010 | 431 | |
262965f5 | 432 | if (unlikely(status < 0)) |
a246b010 | 433 | break; |
a246b010 | 434 | |
262965f5 CL |
435 | /* If we've sent the entire packet, immediately |
436 | * reset the count of bytes sent. */ | |
437 | req->rq_bytes_sent += status; | |
ef759a2e | 438 | task->tk_bytes_sent += status; |
262965f5 CL |
439 | if (likely(req->rq_bytes_sent >= req->rq_slen)) { |
440 | req->rq_bytes_sent = 0; | |
441 | return 0; | |
442 | } | |
a246b010 CL |
443 | |
444 | status = -EAGAIN; | |
262965f5 | 445 | if (retry++ > XS_SENDMSG_RETRY) |
a246b010 CL |
446 | break; |
447 | } | |
448 | ||
262965f5 CL |
449 | switch (status) { |
450 | case -EAGAIN: | |
451 | xs_nospace(task); | |
452 | break; | |
453 | case -ECONNREFUSED: | |
454 | case -ECONNRESET: | |
455 | case -ENOTCONN: | |
456 | case -EPIPE: | |
457 | status = -ENOTCONN; | |
458 | break; | |
459 | default: | |
460 | dprintk("RPC: sendmsg returned unrecognized error %d\n", | |
461 | -status); | |
43118c29 | 462 | xprt_disconnect(xprt); |
262965f5 | 463 | break; |
a246b010 | 464 | } |
262965f5 | 465 | |
a246b010 CL |
466 | return status; |
467 | } | |
468 | ||
e0ab53de TM |
469 | /** |
470 | * xs_tcp_release_xprt - clean up after a tcp transmission | |
471 | * @xprt: transport | |
472 | * @task: rpc task | |
473 | * | |
474 | * This cleans up if an error causes us to abort the transmission of a request. | |
475 | * In this case, the socket may need to be reset in order to avoid confusing | |
476 | * the server. | |
477 | */ | |
478 | static void xs_tcp_release_xprt(struct rpc_xprt *xprt, struct rpc_task *task) | |
479 | { | |
480 | struct rpc_rqst *req; | |
481 | ||
482 | if (task != xprt->snd_task) | |
483 | return; | |
484 | if (task == NULL) | |
485 | goto out_release; | |
486 | req = task->tk_rqstp; | |
487 | if (req->rq_bytes_sent == 0) | |
488 | goto out_release; | |
489 | if (req->rq_bytes_sent == req->rq_snd_buf.len) | |
490 | goto out_release; | |
491 | set_bit(XPRT_CLOSE_WAIT, &task->tk_xprt->state); | |
492 | out_release: | |
493 | xprt_release_xprt(xprt, task); | |
494 | } | |
495 | ||
9903cd1c CL |
496 | /** |
497 | * xs_close - close a socket | |
498 | * @xprt: transport | |
499 | * | |
3167e12c CL |
500 | * This is used when all requests are complete; ie, no DRC state remains |
501 | * on the server we want to save. | |
a246b010 | 502 | */ |
9903cd1c | 503 | static void xs_close(struct rpc_xprt *xprt) |
a246b010 | 504 | { |
ee0ac0c2 CL |
505 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
506 | struct socket *sock = transport->sock; | |
507 | struct sock *sk = transport->inet; | |
a246b010 CL |
508 | |
509 | if (!sk) | |
632e3bdc | 510 | goto clear_close_wait; |
a246b010 | 511 | |
9903cd1c CL |
512 | dprintk("RPC: xs_close xprt %p\n", xprt); |
513 | ||
a246b010 | 514 | write_lock_bh(&sk->sk_callback_lock); |
ee0ac0c2 CL |
515 | transport->inet = NULL; |
516 | transport->sock = NULL; | |
a246b010 | 517 | |
9903cd1c CL |
518 | sk->sk_user_data = NULL; |
519 | sk->sk_data_ready = xprt->old_data_ready; | |
a246b010 | 520 | sk->sk_state_change = xprt->old_state_change; |
9903cd1c | 521 | sk->sk_write_space = xprt->old_write_space; |
a246b010 CL |
522 | write_unlock_bh(&sk->sk_callback_lock); |
523 | ||
9903cd1c | 524 | sk->sk_no_check = 0; |
a246b010 CL |
525 | |
526 | sock_release(sock); | |
632e3bdc TM |
527 | clear_close_wait: |
528 | smp_mb__before_clear_bit(); | |
529 | clear_bit(XPRT_CLOSE_WAIT, &xprt->state); | |
530 | smp_mb__after_clear_bit(); | |
a246b010 CL |
531 | } |
532 | ||
9903cd1c CL |
533 | /** |
534 | * xs_destroy - prepare to shutdown a transport | |
535 | * @xprt: doomed transport | |
536 | * | |
537 | */ | |
538 | static void xs_destroy(struct rpc_xprt *xprt) | |
a246b010 | 539 | { |
9903cd1c CL |
540 | dprintk("RPC: xs_destroy xprt %p\n", xprt); |
541 | ||
55aa4f58 | 542 | cancel_delayed_work(&xprt->connect_worker); |
a246b010 CL |
543 | flush_scheduled_work(); |
544 | ||
545 | xprt_disconnect(xprt); | |
9903cd1c | 546 | xs_close(xprt); |
edb267a6 | 547 | xs_free_peer_addresses(xprt); |
a246b010 | 548 | kfree(xprt->slot); |
c8541ecd | 549 | kfree(xprt); |
a246b010 CL |
550 | } |
551 | ||
9903cd1c CL |
552 | static inline struct rpc_xprt *xprt_from_sock(struct sock *sk) |
553 | { | |
554 | return (struct rpc_xprt *) sk->sk_user_data; | |
555 | } | |
556 | ||
557 | /** | |
558 | * xs_udp_data_ready - "data ready" callback for UDP sockets | |
559 | * @sk: socket with data to read | |
560 | * @len: how much data to read | |
561 | * | |
a246b010 | 562 | */ |
9903cd1c | 563 | static void xs_udp_data_ready(struct sock *sk, int len) |
a246b010 | 564 | { |
9903cd1c CL |
565 | struct rpc_task *task; |
566 | struct rpc_xprt *xprt; | |
a246b010 | 567 | struct rpc_rqst *rovr; |
9903cd1c | 568 | struct sk_buff *skb; |
a246b010 | 569 | int err, repsize, copied; |
d8ed029d AD |
570 | u32 _xid; |
571 | __be32 *xp; | |
a246b010 CL |
572 | |
573 | read_lock(&sk->sk_callback_lock); | |
9903cd1c CL |
574 | dprintk("RPC: xs_udp_data_ready...\n"); |
575 | if (!(xprt = xprt_from_sock(sk))) | |
a246b010 | 576 | goto out; |
a246b010 CL |
577 | |
578 | if ((skb = skb_recv_datagram(sk, 0, 1, &err)) == NULL) | |
579 | goto out; | |
580 | ||
581 | if (xprt->shutdown) | |
582 | goto dropit; | |
583 | ||
584 | repsize = skb->len - sizeof(struct udphdr); | |
585 | if (repsize < 4) { | |
9903cd1c | 586 | dprintk("RPC: impossible RPC reply size %d!\n", repsize); |
a246b010 CL |
587 | goto dropit; |
588 | } | |
589 | ||
590 | /* Copy the XID from the skb... */ | |
591 | xp = skb_header_pointer(skb, sizeof(struct udphdr), | |
592 | sizeof(_xid), &_xid); | |
593 | if (xp == NULL) | |
594 | goto dropit; | |
595 | ||
596 | /* Look up and lock the request corresponding to the given XID */ | |
4a0f8c04 | 597 | spin_lock(&xprt->transport_lock); |
a246b010 CL |
598 | rovr = xprt_lookup_rqst(xprt, *xp); |
599 | if (!rovr) | |
600 | goto out_unlock; | |
601 | task = rovr->rq_task; | |
602 | ||
a246b010 CL |
603 | if ((copied = rovr->rq_private_buf.buflen) > repsize) |
604 | copied = repsize; | |
605 | ||
606 | /* Suck it into the iovec, verify checksum if not done by hw. */ | |
607 | if (csum_partial_copy_to_xdr(&rovr->rq_private_buf, skb)) | |
608 | goto out_unlock; | |
609 | ||
610 | /* Something worked... */ | |
611 | dst_confirm(skb->dst); | |
612 | ||
1570c1e4 CL |
613 | xprt_adjust_cwnd(task, copied); |
614 | xprt_update_rtt(task); | |
615 | xprt_complete_rqst(task, copied); | |
a246b010 CL |
616 | |
617 | out_unlock: | |
4a0f8c04 | 618 | spin_unlock(&xprt->transport_lock); |
a246b010 CL |
619 | dropit: |
620 | skb_free_datagram(sk, skb); | |
621 | out: | |
622 | read_unlock(&sk->sk_callback_lock); | |
623 | } | |
624 | ||
9903cd1c | 625 | static inline size_t xs_tcp_copy_data(skb_reader_t *desc, void *p, size_t len) |
a246b010 CL |
626 | { |
627 | if (len > desc->count) | |
628 | len = desc->count; | |
629 | if (skb_copy_bits(desc->skb, desc->offset, p, len)) { | |
630 | dprintk("RPC: failed to copy %zu bytes from skb. %zu bytes remain\n", | |
631 | len, desc->count); | |
632 | return 0; | |
633 | } | |
634 | desc->offset += len; | |
635 | desc->count -= len; | |
636 | dprintk("RPC: copied %zu bytes from skb. %zu bytes remain\n", | |
637 | len, desc->count); | |
638 | return len; | |
639 | } | |
640 | ||
9903cd1c | 641 | static inline void xs_tcp_read_fraghdr(struct rpc_xprt *xprt, skb_reader_t *desc) |
a246b010 | 642 | { |
51971139 | 643 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
a246b010 CL |
644 | size_t len, used; |
645 | char *p; | |
646 | ||
51971139 CL |
647 | p = ((char *) &transport->tcp_fraghdr) + transport->tcp_offset; |
648 | len = sizeof(transport->tcp_fraghdr) - transport->tcp_offset; | |
9903cd1c | 649 | used = xs_tcp_copy_data(desc, p, len); |
51971139 | 650 | transport->tcp_offset += used; |
a246b010 CL |
651 | if (used != len) |
652 | return; | |
808012fb | 653 | |
51971139 CL |
654 | transport->tcp_reclen = ntohl(transport->tcp_fraghdr); |
655 | if (transport->tcp_reclen & RPC_LAST_STREAM_FRAGMENT) | |
656 | transport->tcp_flags |= XPRT_LAST_FRAG; | |
a246b010 | 657 | else |
51971139 CL |
658 | transport->tcp_flags &= ~XPRT_LAST_FRAG; |
659 | transport->tcp_reclen &= RPC_FRAGMENT_SIZE_MASK; | |
808012fb | 660 | |
51971139 CL |
661 | transport->tcp_flags &= ~XPRT_COPY_RECM; |
662 | transport->tcp_offset = 0; | |
808012fb | 663 | |
a246b010 | 664 | /* Sanity check of the record length */ |
51971139 | 665 | if (unlikely(transport->tcp_reclen < 4)) { |
9903cd1c | 666 | dprintk("RPC: invalid TCP record fragment length\n"); |
a246b010 | 667 | xprt_disconnect(xprt); |
9903cd1c | 668 | return; |
a246b010 CL |
669 | } |
670 | dprintk("RPC: reading TCP record fragment of length %d\n", | |
51971139 | 671 | transport->tcp_reclen); |
a246b010 CL |
672 | } |
673 | ||
51971139 | 674 | static void xs_tcp_check_fraghdr(struct sock_xprt *transport) |
a246b010 | 675 | { |
51971139 CL |
676 | if (transport->tcp_offset == transport->tcp_reclen) { |
677 | transport->tcp_flags |= XPRT_COPY_RECM; | |
678 | transport->tcp_offset = 0; | |
679 | if (transport->tcp_flags & XPRT_LAST_FRAG) { | |
680 | transport->tcp_flags &= ~XPRT_COPY_DATA; | |
681 | transport->tcp_flags |= XPRT_COPY_XID; | |
682 | transport->tcp_copied = 0; | |
a246b010 CL |
683 | } |
684 | } | |
685 | } | |
686 | ||
51971139 | 687 | static inline void xs_tcp_read_xid(struct sock_xprt *transport, skb_reader_t *desc) |
a246b010 CL |
688 | { |
689 | size_t len, used; | |
690 | char *p; | |
691 | ||
51971139 | 692 | len = sizeof(transport->tcp_xid) - transport->tcp_offset; |
a246b010 | 693 | dprintk("RPC: reading XID (%Zu bytes)\n", len); |
51971139 | 694 | p = ((char *) &transport->tcp_xid) + transport->tcp_offset; |
9903cd1c | 695 | used = xs_tcp_copy_data(desc, p, len); |
51971139 | 696 | transport->tcp_offset += used; |
a246b010 CL |
697 | if (used != len) |
698 | return; | |
51971139 CL |
699 | transport->tcp_flags &= ~XPRT_COPY_XID; |
700 | transport->tcp_flags |= XPRT_COPY_DATA; | |
701 | transport->tcp_copied = 4; | |
a246b010 | 702 | dprintk("RPC: reading reply for XID %08x\n", |
51971139 CL |
703 | ntohl(transport->tcp_xid)); |
704 | xs_tcp_check_fraghdr(transport); | |
a246b010 CL |
705 | } |
706 | ||
9903cd1c | 707 | static inline void xs_tcp_read_request(struct rpc_xprt *xprt, skb_reader_t *desc) |
a246b010 | 708 | { |
51971139 | 709 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
a246b010 CL |
710 | struct rpc_rqst *req; |
711 | struct xdr_buf *rcvbuf; | |
712 | size_t len; | |
713 | ssize_t r; | |
714 | ||
715 | /* Find and lock the request corresponding to this xid */ | |
4a0f8c04 | 716 | spin_lock(&xprt->transport_lock); |
51971139 | 717 | req = xprt_lookup_rqst(xprt, transport->tcp_xid); |
a246b010 | 718 | if (!req) { |
51971139 | 719 | transport->tcp_flags &= ~XPRT_COPY_DATA; |
a246b010 | 720 | dprintk("RPC: XID %08x request not found!\n", |
51971139 | 721 | ntohl(transport->tcp_xid)); |
4a0f8c04 | 722 | spin_unlock(&xprt->transport_lock); |
a246b010 CL |
723 | return; |
724 | } | |
725 | ||
726 | rcvbuf = &req->rq_private_buf; | |
727 | len = desc->count; | |
51971139 | 728 | if (len > transport->tcp_reclen - transport->tcp_offset) { |
a246b010 CL |
729 | skb_reader_t my_desc; |
730 | ||
51971139 | 731 | len = transport->tcp_reclen - transport->tcp_offset; |
a246b010 CL |
732 | memcpy(&my_desc, desc, sizeof(my_desc)); |
733 | my_desc.count = len; | |
51971139 | 734 | r = xdr_partial_copy_from_skb(rcvbuf, transport->tcp_copied, |
9903cd1c | 735 | &my_desc, xs_tcp_copy_data); |
a246b010 CL |
736 | desc->count -= r; |
737 | desc->offset += r; | |
738 | } else | |
51971139 | 739 | r = xdr_partial_copy_from_skb(rcvbuf, transport->tcp_copied, |
9903cd1c | 740 | desc, xs_tcp_copy_data); |
a246b010 CL |
741 | |
742 | if (r > 0) { | |
51971139 CL |
743 | transport->tcp_copied += r; |
744 | transport->tcp_offset += r; | |
a246b010 CL |
745 | } |
746 | if (r != len) { | |
747 | /* Error when copying to the receive buffer, | |
748 | * usually because we weren't able to allocate | |
749 | * additional buffer pages. All we can do now | |
750 | * is turn off XPRT_COPY_DATA, so the request | |
751 | * will not receive any additional updates, | |
752 | * and time out. | |
753 | * Any remaining data from this record will | |
754 | * be discarded. | |
755 | */ | |
51971139 | 756 | transport->tcp_flags &= ~XPRT_COPY_DATA; |
a246b010 | 757 | dprintk("RPC: XID %08x truncated request\n", |
51971139 | 758 | ntohl(transport->tcp_xid)); |
a246b010 | 759 | dprintk("RPC: xprt = %p, tcp_copied = %lu, tcp_offset = %u, tcp_reclen = %u\n", |
51971139 CL |
760 | xprt, transport->tcp_copied, transport->tcp_offset, |
761 | transport->tcp_reclen); | |
a246b010 CL |
762 | goto out; |
763 | } | |
764 | ||
765 | dprintk("RPC: XID %08x read %Zd bytes\n", | |
51971139 | 766 | ntohl(transport->tcp_xid), r); |
a246b010 | 767 | dprintk("RPC: xprt = %p, tcp_copied = %lu, tcp_offset = %u, tcp_reclen = %u\n", |
51971139 CL |
768 | xprt, transport->tcp_copied, transport->tcp_offset, |
769 | transport->tcp_reclen); | |
770 | ||
771 | if (transport->tcp_copied == req->rq_private_buf.buflen) | |
772 | transport->tcp_flags &= ~XPRT_COPY_DATA; | |
773 | else if (transport->tcp_offset == transport->tcp_reclen) { | |
774 | if (transport->tcp_flags & XPRT_LAST_FRAG) | |
775 | transport->tcp_flags &= ~XPRT_COPY_DATA; | |
a246b010 CL |
776 | } |
777 | ||
778 | out: | |
51971139 CL |
779 | if (!(transport->tcp_flags & XPRT_COPY_DATA)) |
780 | xprt_complete_rqst(req->rq_task, transport->tcp_copied); | |
4a0f8c04 | 781 | spin_unlock(&xprt->transport_lock); |
51971139 | 782 | xs_tcp_check_fraghdr(transport); |
a246b010 CL |
783 | } |
784 | ||
51971139 | 785 | static inline void xs_tcp_read_discard(struct sock_xprt *transport, skb_reader_t *desc) |
a246b010 CL |
786 | { |
787 | size_t len; | |
788 | ||
51971139 | 789 | len = transport->tcp_reclen - transport->tcp_offset; |
a246b010 CL |
790 | if (len > desc->count) |
791 | len = desc->count; | |
792 | desc->count -= len; | |
793 | desc->offset += len; | |
51971139 | 794 | transport->tcp_offset += len; |
a246b010 | 795 | dprintk("RPC: discarded %Zu bytes\n", len); |
51971139 | 796 | xs_tcp_check_fraghdr(transport); |
a246b010 CL |
797 | } |
798 | ||
9903cd1c | 799 | static int xs_tcp_data_recv(read_descriptor_t *rd_desc, struct sk_buff *skb, unsigned int offset, size_t len) |
a246b010 CL |
800 | { |
801 | struct rpc_xprt *xprt = rd_desc->arg.data; | |
51971139 | 802 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
a246b010 CL |
803 | skb_reader_t desc = { |
804 | .skb = skb, | |
805 | .offset = offset, | |
806 | .count = len, | |
9903cd1c | 807 | }; |
a246b010 | 808 | |
9903cd1c | 809 | dprintk("RPC: xs_tcp_data_recv started\n"); |
a246b010 CL |
810 | do { |
811 | /* Read in a new fragment marker if necessary */ | |
812 | /* Can we ever really expect to get completely empty fragments? */ | |
51971139 | 813 | if (transport->tcp_flags & XPRT_COPY_RECM) { |
9903cd1c | 814 | xs_tcp_read_fraghdr(xprt, &desc); |
a246b010 CL |
815 | continue; |
816 | } | |
817 | /* Read in the xid if necessary */ | |
51971139 CL |
818 | if (transport->tcp_flags & XPRT_COPY_XID) { |
819 | xs_tcp_read_xid(transport, &desc); | |
a246b010 CL |
820 | continue; |
821 | } | |
822 | /* Read in the request data */ | |
51971139 | 823 | if (transport->tcp_flags & XPRT_COPY_DATA) { |
9903cd1c | 824 | xs_tcp_read_request(xprt, &desc); |
a246b010 CL |
825 | continue; |
826 | } | |
827 | /* Skip over any trailing bytes on short reads */ | |
51971139 | 828 | xs_tcp_read_discard(transport, &desc); |
a246b010 | 829 | } while (desc.count); |
9903cd1c | 830 | dprintk("RPC: xs_tcp_data_recv done\n"); |
a246b010 CL |
831 | return len - desc.count; |
832 | } | |
833 | ||
9903cd1c CL |
834 | /** |
835 | * xs_tcp_data_ready - "data ready" callback for TCP sockets | |
836 | * @sk: socket with data to read | |
837 | * @bytes: how much data to read | |
838 | * | |
839 | */ | |
840 | static void xs_tcp_data_ready(struct sock *sk, int bytes) | |
a246b010 CL |
841 | { |
842 | struct rpc_xprt *xprt; | |
843 | read_descriptor_t rd_desc; | |
844 | ||
845 | read_lock(&sk->sk_callback_lock); | |
9903cd1c CL |
846 | dprintk("RPC: xs_tcp_data_ready...\n"); |
847 | if (!(xprt = xprt_from_sock(sk))) | |
a246b010 | 848 | goto out; |
a246b010 CL |
849 | if (xprt->shutdown) |
850 | goto out; | |
851 | ||
9903cd1c | 852 | /* We use rd_desc to pass struct xprt to xs_tcp_data_recv */ |
a246b010 CL |
853 | rd_desc.arg.data = xprt; |
854 | rd_desc.count = 65536; | |
9903cd1c | 855 | tcp_read_sock(sk, &rd_desc, xs_tcp_data_recv); |
a246b010 CL |
856 | out: |
857 | read_unlock(&sk->sk_callback_lock); | |
858 | } | |
859 | ||
9903cd1c CL |
860 | /** |
861 | * xs_tcp_state_change - callback to handle TCP socket state changes | |
862 | * @sk: socket whose state has changed | |
863 | * | |
864 | */ | |
865 | static void xs_tcp_state_change(struct sock *sk) | |
a246b010 | 866 | { |
9903cd1c | 867 | struct rpc_xprt *xprt; |
a246b010 CL |
868 | |
869 | read_lock(&sk->sk_callback_lock); | |
870 | if (!(xprt = xprt_from_sock(sk))) | |
871 | goto out; | |
9903cd1c | 872 | dprintk("RPC: xs_tcp_state_change client %p...\n", xprt); |
a246b010 CL |
873 | dprintk("RPC: state %x conn %d dead %d zapped %d\n", |
874 | sk->sk_state, xprt_connected(xprt), | |
875 | sock_flag(sk, SOCK_DEAD), | |
876 | sock_flag(sk, SOCK_ZAPPED)); | |
877 | ||
878 | switch (sk->sk_state) { | |
879 | case TCP_ESTABLISHED: | |
4a0f8c04 | 880 | spin_lock_bh(&xprt->transport_lock); |
a246b010 | 881 | if (!xprt_test_and_set_connected(xprt)) { |
51971139 CL |
882 | struct sock_xprt *transport = container_of(xprt, |
883 | struct sock_xprt, xprt); | |
884 | ||
a246b010 | 885 | /* Reset TCP record info */ |
51971139 CL |
886 | transport->tcp_offset = 0; |
887 | transport->tcp_reclen = 0; | |
888 | transport->tcp_copied = 0; | |
889 | transport->tcp_flags = XPRT_COPY_RECM | XPRT_COPY_XID; | |
890 | ||
03bf4b70 | 891 | xprt->reestablish_timeout = XS_TCP_INIT_REEST_TO; |
44fbac22 | 892 | xprt_wake_pending_tasks(xprt, 0); |
a246b010 | 893 | } |
4a0f8c04 | 894 | spin_unlock_bh(&xprt->transport_lock); |
a246b010 CL |
895 | break; |
896 | case TCP_SYN_SENT: | |
897 | case TCP_SYN_RECV: | |
898 | break; | |
632e3bdc TM |
899 | case TCP_CLOSE_WAIT: |
900 | /* Try to schedule an autoclose RPC calls */ | |
901 | set_bit(XPRT_CLOSE_WAIT, &xprt->state); | |
902 | if (test_and_set_bit(XPRT_LOCKED, &xprt->state) == 0) | |
903 | schedule_work(&xprt->task_cleanup); | |
a246b010 CL |
904 | default: |
905 | xprt_disconnect(xprt); | |
a246b010 CL |
906 | } |
907 | out: | |
908 | read_unlock(&sk->sk_callback_lock); | |
909 | } | |
910 | ||
9903cd1c | 911 | /** |
c7b2cae8 CL |
912 | * xs_udp_write_space - callback invoked when socket buffer space |
913 | * becomes available | |
9903cd1c CL |
914 | * @sk: socket whose state has changed |
915 | * | |
a246b010 CL |
916 | * Called when more output buffer space is available for this socket. |
917 | * We try not to wake our writers until they can make "significant" | |
c7b2cae8 | 918 | * progress, otherwise we'll waste resources thrashing kernel_sendmsg |
a246b010 CL |
919 | * with a bunch of small requests. |
920 | */ | |
c7b2cae8 | 921 | static void xs_udp_write_space(struct sock *sk) |
a246b010 | 922 | { |
a246b010 | 923 | read_lock(&sk->sk_callback_lock); |
a246b010 | 924 | |
c7b2cae8 CL |
925 | /* from net/core/sock.c:sock_def_write_space */ |
926 | if (sock_writeable(sk)) { | |
927 | struct socket *sock; | |
928 | struct rpc_xprt *xprt; | |
929 | ||
930 | if (unlikely(!(sock = sk->sk_socket))) | |
a246b010 | 931 | goto out; |
c7b2cae8 CL |
932 | if (unlikely(!(xprt = xprt_from_sock(sk)))) |
933 | goto out; | |
934 | if (unlikely(!test_and_clear_bit(SOCK_NOSPACE, &sock->flags))) | |
a246b010 | 935 | goto out; |
c7b2cae8 CL |
936 | |
937 | xprt_write_space(xprt); | |
a246b010 CL |
938 | } |
939 | ||
c7b2cae8 CL |
940 | out: |
941 | read_unlock(&sk->sk_callback_lock); | |
942 | } | |
a246b010 | 943 | |
c7b2cae8 CL |
944 | /** |
945 | * xs_tcp_write_space - callback invoked when socket buffer space | |
946 | * becomes available | |
947 | * @sk: socket whose state has changed | |
948 | * | |
949 | * Called when more output buffer space is available for this socket. | |
950 | * We try not to wake our writers until they can make "significant" | |
951 | * progress, otherwise we'll waste resources thrashing kernel_sendmsg | |
952 | * with a bunch of small requests. | |
953 | */ | |
954 | static void xs_tcp_write_space(struct sock *sk) | |
955 | { | |
956 | read_lock(&sk->sk_callback_lock); | |
957 | ||
958 | /* from net/core/stream.c:sk_stream_write_space */ | |
959 | if (sk_stream_wspace(sk) >= sk_stream_min_wspace(sk)) { | |
960 | struct socket *sock; | |
961 | struct rpc_xprt *xprt; | |
962 | ||
963 | if (unlikely(!(sock = sk->sk_socket))) | |
964 | goto out; | |
965 | if (unlikely(!(xprt = xprt_from_sock(sk)))) | |
966 | goto out; | |
967 | if (unlikely(!test_and_clear_bit(SOCK_NOSPACE, &sock->flags))) | |
968 | goto out; | |
969 | ||
970 | xprt_write_space(xprt); | |
971 | } | |
972 | ||
973 | out: | |
a246b010 CL |
974 | read_unlock(&sk->sk_callback_lock); |
975 | } | |
976 | ||
470056c2 | 977 | static void xs_udp_do_set_buffer_size(struct rpc_xprt *xprt) |
a246b010 | 978 | { |
ee0ac0c2 CL |
979 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
980 | struct sock *sk = transport->inet; | |
a246b010 | 981 | |
a246b010 CL |
982 | if (xprt->rcvsize) { |
983 | sk->sk_userlocks |= SOCK_RCVBUF_LOCK; | |
984 | sk->sk_rcvbuf = xprt->rcvsize * xprt->max_reqs * 2; | |
985 | } | |
986 | if (xprt->sndsize) { | |
987 | sk->sk_userlocks |= SOCK_SNDBUF_LOCK; | |
988 | sk->sk_sndbuf = xprt->sndsize * xprt->max_reqs * 2; | |
989 | sk->sk_write_space(sk); | |
990 | } | |
991 | } | |
992 | ||
43118c29 | 993 | /** |
470056c2 | 994 | * xs_udp_set_buffer_size - set send and receive limits |
43118c29 | 995 | * @xprt: generic transport |
470056c2 CL |
996 | * @sndsize: requested size of send buffer, in bytes |
997 | * @rcvsize: requested size of receive buffer, in bytes | |
43118c29 | 998 | * |
470056c2 | 999 | * Set socket send and receive buffer size limits. |
43118c29 | 1000 | */ |
470056c2 | 1001 | static void xs_udp_set_buffer_size(struct rpc_xprt *xprt, size_t sndsize, size_t rcvsize) |
43118c29 | 1002 | { |
470056c2 CL |
1003 | xprt->sndsize = 0; |
1004 | if (sndsize) | |
1005 | xprt->sndsize = sndsize + 1024; | |
1006 | xprt->rcvsize = 0; | |
1007 | if (rcvsize) | |
1008 | xprt->rcvsize = rcvsize + 1024; | |
1009 | ||
1010 | xs_udp_do_set_buffer_size(xprt); | |
43118c29 CL |
1011 | } |
1012 | ||
46c0ee8b CL |
1013 | /** |
1014 | * xs_udp_timer - called when a retransmit timeout occurs on a UDP transport | |
1015 | * @task: task that timed out | |
1016 | * | |
1017 | * Adjust the congestion window after a retransmit timeout has occurred. | |
1018 | */ | |
1019 | static void xs_udp_timer(struct rpc_task *task) | |
1020 | { | |
1021 | xprt_adjust_cwnd(task, -ETIMEDOUT); | |
1022 | } | |
1023 | ||
b85d8806 CL |
1024 | static unsigned short xs_get_random_port(void) |
1025 | { | |
1026 | unsigned short range = xprt_max_resvport - xprt_min_resvport; | |
1027 | unsigned short rand = (unsigned short) net_random() % range; | |
1028 | return rand + xprt_min_resvport; | |
1029 | } | |
1030 | ||
edb267a6 CL |
1031 | /** |
1032 | * xs_print_peer_address - format an IPv4 address for printing | |
1033 | * @xprt: generic transport | |
1034 | * @format: flags field indicating which parts of the address to render | |
1035 | */ | |
1036 | static char *xs_print_peer_address(struct rpc_xprt *xprt, enum rpc_display_format_t format) | |
1037 | { | |
1038 | if (xprt->address_strings[format] != NULL) | |
1039 | return xprt->address_strings[format]; | |
1040 | else | |
1041 | return "unprintable"; | |
1042 | } | |
1043 | ||
92200412 CL |
1044 | /** |
1045 | * xs_set_port - reset the port number in the remote endpoint address | |
1046 | * @xprt: generic transport | |
1047 | * @port: new port number | |
1048 | * | |
1049 | */ | |
1050 | static void xs_set_port(struct rpc_xprt *xprt, unsigned short port) | |
1051 | { | |
c4efcb1d CL |
1052 | struct sockaddr_in *sap = (struct sockaddr_in *) &xprt->addr; |
1053 | ||
92200412 | 1054 | dprintk("RPC: setting port for xprt %p to %u\n", xprt, port); |
c4efcb1d CL |
1055 | |
1056 | sap->sin_port = htons(port); | |
92200412 CL |
1057 | } |
1058 | ||
9903cd1c | 1059 | static int xs_bindresvport(struct rpc_xprt *xprt, struct socket *sock) |
a246b010 CL |
1060 | { |
1061 | struct sockaddr_in myaddr = { | |
1062 | .sin_family = AF_INET, | |
1063 | }; | |
529b33c6 CL |
1064 | int err; |
1065 | unsigned short port = xprt->port; | |
a246b010 | 1066 | |
a246b010 CL |
1067 | do { |
1068 | myaddr.sin_port = htons(port); | |
e6242e92 | 1069 | err = kernel_bind(sock, (struct sockaddr *) &myaddr, |
a246b010 CL |
1070 | sizeof(myaddr)); |
1071 | if (err == 0) { | |
1072 | xprt->port = port; | |
9903cd1c CL |
1073 | dprintk("RPC: xs_bindresvport bound to port %u\n", |
1074 | port); | |
a246b010 CL |
1075 | return 0; |
1076 | } | |
529b33c6 CL |
1077 | if (port <= xprt_min_resvport) |
1078 | port = xprt_max_resvport; | |
1079 | else | |
1080 | port--; | |
a246b010 CL |
1081 | } while (err == -EADDRINUSE && port != xprt->port); |
1082 | ||
9903cd1c | 1083 | dprintk("RPC: can't bind to reserved port (%d).\n", -err); |
a246b010 CL |
1084 | return err; |
1085 | } | |
1086 | ||
b0d93ad5 CL |
1087 | /** |
1088 | * xs_udp_connect_worker - set up a UDP socket | |
1089 | * @args: RPC transport to connect | |
1090 | * | |
1091 | * Invoked by a work queue tasklet. | |
1092 | */ | |
1093 | static void xs_udp_connect_worker(void *args) | |
a246b010 | 1094 | { |
b0d93ad5 | 1095 | struct rpc_xprt *xprt = (struct rpc_xprt *) args; |
ee0ac0c2 CL |
1096 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
1097 | struct socket *sock = transport->sock; | |
b0d93ad5 | 1098 | int err, status = -EIO; |
9903cd1c | 1099 | |
ec739ef0 | 1100 | if (xprt->shutdown || !xprt_bound(xprt)) |
b0d93ad5 | 1101 | goto out; |
9903cd1c | 1102 | |
b0d93ad5 CL |
1103 | /* Start by resetting any existing state */ |
1104 | xs_close(xprt); | |
9903cd1c | 1105 | |
b0d93ad5 CL |
1106 | if ((err = sock_create_kern(PF_INET, SOCK_DGRAM, IPPROTO_UDP, &sock)) < 0) { |
1107 | dprintk("RPC: can't create UDP transport socket (%d).\n", -err); | |
1108 | goto out; | |
1109 | } | |
9903cd1c | 1110 | |
b0d93ad5 CL |
1111 | if (xprt->resvport && xs_bindresvport(xprt, sock) < 0) { |
1112 | sock_release(sock); | |
1113 | goto out; | |
1114 | } | |
9903cd1c | 1115 | |
edb267a6 CL |
1116 | dprintk("RPC: worker connecting xprt %p to address: %s\n", |
1117 | xprt, xs_print_peer_address(xprt, RPC_DISPLAY_ALL)); | |
1118 | ||
ee0ac0c2 | 1119 | if (!transport->inet) { |
b0d93ad5 | 1120 | struct sock *sk = sock->sk; |
a246b010 | 1121 | |
b0d93ad5 | 1122 | write_lock_bh(&sk->sk_callback_lock); |
a246b010 | 1123 | |
b0d93ad5 CL |
1124 | sk->sk_user_data = xprt; |
1125 | xprt->old_data_ready = sk->sk_data_ready; | |
1126 | xprt->old_state_change = sk->sk_state_change; | |
1127 | xprt->old_write_space = sk->sk_write_space; | |
9903cd1c | 1128 | sk->sk_data_ready = xs_udp_data_ready; |
c7b2cae8 | 1129 | sk->sk_write_space = xs_udp_write_space; |
a246b010 | 1130 | sk->sk_no_check = UDP_CSUM_NORCV; |
b079fa7b | 1131 | sk->sk_allocation = GFP_ATOMIC; |
b0d93ad5 | 1132 | |
a246b010 | 1133 | xprt_set_connected(xprt); |
a246b010 | 1134 | |
b0d93ad5 | 1135 | /* Reset to new socket */ |
ee0ac0c2 CL |
1136 | transport->sock = sock; |
1137 | transport->inet = sk; | |
a246b010 | 1138 | |
b0d93ad5 CL |
1139 | write_unlock_bh(&sk->sk_callback_lock); |
1140 | } | |
470056c2 | 1141 | xs_udp_do_set_buffer_size(xprt); |
b0d93ad5 CL |
1142 | status = 0; |
1143 | out: | |
1144 | xprt_wake_pending_tasks(xprt, status); | |
1145 | xprt_clear_connecting(xprt); | |
a246b010 CL |
1146 | } |
1147 | ||
3167e12c CL |
1148 | /* |
1149 | * We need to preserve the port number so the reply cache on the server can | |
1150 | * find our cached RPC replies when we get around to reconnecting. | |
1151 | */ | |
1152 | static void xs_tcp_reuse_connection(struct rpc_xprt *xprt) | |
1153 | { | |
1154 | int result; | |
ee0ac0c2 | 1155 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
3167e12c CL |
1156 | struct sockaddr any; |
1157 | ||
1158 | dprintk("RPC: disconnecting xprt %p to reuse port\n", xprt); | |
1159 | ||
1160 | /* | |
1161 | * Disconnect the transport socket by doing a connect operation | |
1162 | * with AF_UNSPEC. This should return immediately... | |
1163 | */ | |
1164 | memset(&any, 0, sizeof(any)); | |
1165 | any.sa_family = AF_UNSPEC; | |
ee0ac0c2 | 1166 | result = kernel_connect(transport->sock, &any, sizeof(any), 0); |
3167e12c CL |
1167 | if (result) |
1168 | dprintk("RPC: AF_UNSPEC connect return code %d\n", | |
1169 | result); | |
1170 | } | |
1171 | ||
9903cd1c | 1172 | /** |
b0d93ad5 | 1173 | * xs_tcp_connect_worker - connect a TCP socket to a remote endpoint |
9903cd1c CL |
1174 | * @args: RPC transport to connect |
1175 | * | |
1176 | * Invoked by a work queue tasklet. | |
a246b010 | 1177 | */ |
b0d93ad5 | 1178 | static void xs_tcp_connect_worker(void *args) |
a246b010 CL |
1179 | { |
1180 | struct rpc_xprt *xprt = (struct rpc_xprt *)args; | |
ee0ac0c2 CL |
1181 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
1182 | struct socket *sock = transport->sock; | |
b0d93ad5 | 1183 | int err, status = -EIO; |
a246b010 | 1184 | |
ec739ef0 | 1185 | if (xprt->shutdown || !xprt_bound(xprt)) |
a246b010 CL |
1186 | goto out; |
1187 | ||
ee0ac0c2 | 1188 | if (!sock) { |
3167e12c CL |
1189 | /* start from scratch */ |
1190 | if ((err = sock_create_kern(PF_INET, SOCK_STREAM, IPPROTO_TCP, &sock)) < 0) { | |
1191 | dprintk("RPC: can't create TCP transport socket (%d).\n", -err); | |
1192 | goto out; | |
1193 | } | |
a246b010 | 1194 | |
3167e12c CL |
1195 | if (xprt->resvport && xs_bindresvport(xprt, sock) < 0) { |
1196 | sock_release(sock); | |
1197 | goto out; | |
1198 | } | |
1199 | } else | |
1200 | /* "close" the socket, preserving the local port */ | |
1201 | xs_tcp_reuse_connection(xprt); | |
a246b010 | 1202 | |
edb267a6 CL |
1203 | dprintk("RPC: worker connecting xprt %p to address: %s\n", |
1204 | xprt, xs_print_peer_address(xprt, RPC_DISPLAY_ALL)); | |
1205 | ||
ee0ac0c2 | 1206 | if (!transport->inet) { |
b0d93ad5 CL |
1207 | struct sock *sk = sock->sk; |
1208 | ||
1209 | write_lock_bh(&sk->sk_callback_lock); | |
1210 | ||
1211 | sk->sk_user_data = xprt; | |
1212 | xprt->old_data_ready = sk->sk_data_ready; | |
1213 | xprt->old_state_change = sk->sk_state_change; | |
1214 | xprt->old_write_space = sk->sk_write_space; | |
1215 | sk->sk_data_ready = xs_tcp_data_ready; | |
1216 | sk->sk_state_change = xs_tcp_state_change; | |
1217 | sk->sk_write_space = xs_tcp_write_space; | |
b079fa7b | 1218 | sk->sk_allocation = GFP_ATOMIC; |
3167e12c CL |
1219 | |
1220 | /* socket options */ | |
1221 | sk->sk_userlocks |= SOCK_BINDPORT_LOCK; | |
1222 | sock_reset_flag(sk, SOCK_LINGER); | |
1223 | tcp_sk(sk)->linger2 = 0; | |
1224 | tcp_sk(sk)->nonagle |= TCP_NAGLE_OFF; | |
b0d93ad5 CL |
1225 | |
1226 | xprt_clear_connected(xprt); | |
1227 | ||
1228 | /* Reset to new socket */ | |
ee0ac0c2 CL |
1229 | transport->sock = sock; |
1230 | transport->inet = sk; | |
b0d93ad5 CL |
1231 | |
1232 | write_unlock_bh(&sk->sk_callback_lock); | |
1233 | } | |
1234 | ||
1235 | /* Tell the socket layer to start connecting... */ | |
262ca07d CL |
1236 | xprt->stat.connect_count++; |
1237 | xprt->stat.connect_start = jiffies; | |
e6242e92 | 1238 | status = kernel_connect(sock, (struct sockaddr *) &xprt->addr, |
c4efcb1d | 1239 | xprt->addrlen, O_NONBLOCK); |
a246b010 CL |
1240 | dprintk("RPC: %p connect status %d connected %d sock state %d\n", |
1241 | xprt, -status, xprt_connected(xprt), sock->sk->sk_state); | |
1242 | if (status < 0) { | |
1243 | switch (status) { | |
1244 | case -EINPROGRESS: | |
1245 | case -EALREADY: | |
1246 | goto out_clear; | |
3167e12c CL |
1247 | case -ECONNREFUSED: |
1248 | case -ECONNRESET: | |
1249 | /* retry with existing socket, after a delay */ | |
1250 | break; | |
1251 | default: | |
1252 | /* get rid of existing socket, and retry */ | |
1253 | xs_close(xprt); | |
1254 | break; | |
a246b010 CL |
1255 | } |
1256 | } | |
1257 | out: | |
44fbac22 | 1258 | xprt_wake_pending_tasks(xprt, status); |
a246b010 | 1259 | out_clear: |
2226feb6 | 1260 | xprt_clear_connecting(xprt); |
a246b010 CL |
1261 | } |
1262 | ||
9903cd1c CL |
1263 | /** |
1264 | * xs_connect - connect a socket to a remote endpoint | |
1265 | * @task: address of RPC task that manages state of connect request | |
1266 | * | |
1267 | * TCP: If the remote end dropped the connection, delay reconnecting. | |
03bf4b70 CL |
1268 | * |
1269 | * UDP socket connects are synchronous, but we use a work queue anyway | |
1270 | * to guarantee that even unprivileged user processes can set up a | |
1271 | * socket on a privileged port. | |
1272 | * | |
1273 | * If a UDP socket connect fails, the delay behavior here prevents | |
1274 | * retry floods (hard mounts). | |
9903cd1c CL |
1275 | */ |
1276 | static void xs_connect(struct rpc_task *task) | |
a246b010 CL |
1277 | { |
1278 | struct rpc_xprt *xprt = task->tk_xprt; | |
ee0ac0c2 | 1279 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
a246b010 | 1280 | |
b0d93ad5 CL |
1281 | if (xprt_test_and_set_connecting(xprt)) |
1282 | return; | |
1283 | ||
ee0ac0c2 | 1284 | if (transport->sock != NULL) { |
03bf4b70 CL |
1285 | dprintk("RPC: xs_connect delayed xprt %p for %lu seconds\n", |
1286 | xprt, xprt->reestablish_timeout / HZ); | |
b0d93ad5 | 1287 | schedule_delayed_work(&xprt->connect_worker, |
03bf4b70 CL |
1288 | xprt->reestablish_timeout); |
1289 | xprt->reestablish_timeout <<= 1; | |
1290 | if (xprt->reestablish_timeout > XS_TCP_MAX_REEST_TO) | |
1291 | xprt->reestablish_timeout = XS_TCP_MAX_REEST_TO; | |
b0d93ad5 CL |
1292 | } else { |
1293 | dprintk("RPC: xs_connect scheduled xprt %p\n", xprt); | |
1294 | schedule_work(&xprt->connect_worker); | |
1295 | ||
1296 | /* flush_scheduled_work can sleep... */ | |
1297 | if (!RPC_IS_ASYNC(task)) | |
1298 | flush_scheduled_work(); | |
a246b010 CL |
1299 | } |
1300 | } | |
1301 | ||
262ca07d CL |
1302 | /** |
1303 | * xs_udp_print_stats - display UDP socket-specifc stats | |
1304 | * @xprt: rpc_xprt struct containing statistics | |
1305 | * @seq: output file | |
1306 | * | |
1307 | */ | |
1308 | static void xs_udp_print_stats(struct rpc_xprt *xprt, struct seq_file *seq) | |
1309 | { | |
1310 | seq_printf(seq, "\txprt:\tudp %u %lu %lu %lu %lu %Lu %Lu\n", | |
1311 | xprt->port, | |
1312 | xprt->stat.bind_count, | |
1313 | xprt->stat.sends, | |
1314 | xprt->stat.recvs, | |
1315 | xprt->stat.bad_xids, | |
1316 | xprt->stat.req_u, | |
1317 | xprt->stat.bklog_u); | |
1318 | } | |
1319 | ||
1320 | /** | |
1321 | * xs_tcp_print_stats - display TCP socket-specifc stats | |
1322 | * @xprt: rpc_xprt struct containing statistics | |
1323 | * @seq: output file | |
1324 | * | |
1325 | */ | |
1326 | static void xs_tcp_print_stats(struct rpc_xprt *xprt, struct seq_file *seq) | |
1327 | { | |
1328 | long idle_time = 0; | |
1329 | ||
1330 | if (xprt_connected(xprt)) | |
1331 | idle_time = (long)(jiffies - xprt->last_used) / HZ; | |
1332 | ||
1333 | seq_printf(seq, "\txprt:\ttcp %u %lu %lu %lu %ld %lu %lu %lu %Lu %Lu\n", | |
1334 | xprt->port, | |
1335 | xprt->stat.bind_count, | |
1336 | xprt->stat.connect_count, | |
1337 | xprt->stat.connect_time, | |
1338 | idle_time, | |
1339 | xprt->stat.sends, | |
1340 | xprt->stat.recvs, | |
1341 | xprt->stat.bad_xids, | |
1342 | xprt->stat.req_u, | |
1343 | xprt->stat.bklog_u); | |
1344 | } | |
1345 | ||
262965f5 | 1346 | static struct rpc_xprt_ops xs_udp_ops = { |
43118c29 | 1347 | .set_buffer_size = xs_udp_set_buffer_size, |
edb267a6 | 1348 | .print_addr = xs_print_peer_address, |
12a80469 | 1349 | .reserve_xprt = xprt_reserve_xprt_cong, |
49e9a890 | 1350 | .release_xprt = xprt_release_xprt_cong, |
bbf7c1dd | 1351 | .rpcbind = rpc_getport, |
92200412 | 1352 | .set_port = xs_set_port, |
262965f5 | 1353 | .connect = xs_connect, |
02107148 CL |
1354 | .buf_alloc = rpc_malloc, |
1355 | .buf_free = rpc_free, | |
262965f5 | 1356 | .send_request = xs_udp_send_request, |
fe3aca29 | 1357 | .set_retrans_timeout = xprt_set_retrans_timeout_rtt, |
46c0ee8b | 1358 | .timer = xs_udp_timer, |
a58dd398 | 1359 | .release_request = xprt_release_rqst_cong, |
262965f5 CL |
1360 | .close = xs_close, |
1361 | .destroy = xs_destroy, | |
262ca07d | 1362 | .print_stats = xs_udp_print_stats, |
262965f5 CL |
1363 | }; |
1364 | ||
1365 | static struct rpc_xprt_ops xs_tcp_ops = { | |
edb267a6 | 1366 | .print_addr = xs_print_peer_address, |
12a80469 | 1367 | .reserve_xprt = xprt_reserve_xprt, |
e0ab53de | 1368 | .release_xprt = xs_tcp_release_xprt, |
bbf7c1dd | 1369 | .rpcbind = rpc_getport, |
92200412 | 1370 | .set_port = xs_set_port, |
9903cd1c | 1371 | .connect = xs_connect, |
02107148 CL |
1372 | .buf_alloc = rpc_malloc, |
1373 | .buf_free = rpc_free, | |
262965f5 | 1374 | .send_request = xs_tcp_send_request, |
fe3aca29 | 1375 | .set_retrans_timeout = xprt_set_retrans_timeout_def, |
9903cd1c CL |
1376 | .close = xs_close, |
1377 | .destroy = xs_destroy, | |
262ca07d | 1378 | .print_stats = xs_tcp_print_stats, |
a246b010 CL |
1379 | }; |
1380 | ||
c8541ecd CL |
1381 | static struct rpc_xprt *xs_setup_xprt(struct sockaddr *addr, size_t addrlen, unsigned int slot_table_size) |
1382 | { | |
1383 | struct rpc_xprt *xprt; | |
ffc2e518 | 1384 | struct sock_xprt *new; |
c8541ecd CL |
1385 | |
1386 | if (addrlen > sizeof(xprt->addr)) { | |
1387 | dprintk("RPC: xs_setup_xprt: address too large\n"); | |
1388 | return ERR_PTR(-EBADF); | |
1389 | } | |
1390 | ||
ffc2e518 CL |
1391 | new = kzalloc(sizeof(*new), GFP_KERNEL); |
1392 | if (new == NULL) { | |
c8541ecd CL |
1393 | dprintk("RPC: xs_setup_xprt: couldn't allocate rpc_xprt\n"); |
1394 | return ERR_PTR(-ENOMEM); | |
1395 | } | |
ffc2e518 | 1396 | xprt = &new->xprt; |
c8541ecd CL |
1397 | |
1398 | xprt->max_reqs = slot_table_size; | |
1399 | xprt->slot = kcalloc(xprt->max_reqs, sizeof(struct rpc_rqst), GFP_KERNEL); | |
1400 | if (xprt->slot == NULL) { | |
1401 | kfree(xprt); | |
1402 | dprintk("RPC: xs_setup_xprt: couldn't allocate slot table\n"); | |
1403 | return ERR_PTR(-ENOMEM); | |
1404 | } | |
1405 | ||
1406 | memcpy(&xprt->addr, addr, addrlen); | |
1407 | xprt->addrlen = addrlen; | |
1408 | xprt->port = xs_get_random_port(); | |
1409 | ||
1410 | return xprt; | |
1411 | } | |
1412 | ||
9903cd1c CL |
1413 | /** |
1414 | * xs_setup_udp - Set up transport to use a UDP socket | |
c8541ecd CL |
1415 | * @addr: address of remote server |
1416 | * @addrlen: length of address in bytes | |
9903cd1c CL |
1417 | * @to: timeout parameters |
1418 | * | |
1419 | */ | |
c8541ecd | 1420 | struct rpc_xprt *xs_setup_udp(struct sockaddr *addr, size_t addrlen, struct rpc_timeout *to) |
a246b010 | 1421 | { |
c8541ecd | 1422 | struct rpc_xprt *xprt; |
a246b010 | 1423 | |
c8541ecd CL |
1424 | xprt = xs_setup_xprt(addr, addrlen, xprt_udp_slot_table_entries); |
1425 | if (IS_ERR(xprt)) | |
1426 | return xprt; | |
a246b010 | 1427 | |
c8541ecd | 1428 | if (ntohs(((struct sockaddr_in *)addr)->sin_port) != 0) |
ec739ef0 | 1429 | xprt_set_bound(xprt); |
ec739ef0 CL |
1430 | |
1431 | xprt->prot = IPPROTO_UDP; | |
808012fb | 1432 | xprt->tsh_size = 0; |
a246b010 CL |
1433 | /* XXX: header size can vary due to auth type, IPv6, etc. */ |
1434 | xprt->max_payload = (1U << 16) - (MAX_HEADER << 3); | |
1435 | ||
b0d93ad5 | 1436 | INIT_WORK(&xprt->connect_worker, xs_udp_connect_worker, xprt); |
03bf4b70 CL |
1437 | xprt->bind_timeout = XS_BIND_TO; |
1438 | xprt->connect_timeout = XS_UDP_CONN_TO; | |
1439 | xprt->reestablish_timeout = XS_UDP_REEST_TO; | |
1440 | xprt->idle_timeout = XS_IDLE_DISC_TO; | |
a246b010 | 1441 | |
262965f5 | 1442 | xprt->ops = &xs_udp_ops; |
a246b010 CL |
1443 | |
1444 | if (to) | |
1445 | xprt->timeout = *to; | |
1446 | else | |
9903cd1c | 1447 | xprt_set_timeout(&xprt->timeout, 5, 5 * HZ); |
a246b010 | 1448 | |
edb267a6 CL |
1449 | xs_format_peer_addresses(xprt); |
1450 | dprintk("RPC: set up transport to address %s\n", | |
1451 | xs_print_peer_address(xprt, RPC_DISPLAY_ALL)); | |
1452 | ||
c8541ecd | 1453 | return xprt; |
a246b010 CL |
1454 | } |
1455 | ||
9903cd1c CL |
1456 | /** |
1457 | * xs_setup_tcp - Set up transport to use a TCP socket | |
c8541ecd CL |
1458 | * @addr: address of remote server |
1459 | * @addrlen: length of address in bytes | |
9903cd1c CL |
1460 | * @to: timeout parameters |
1461 | * | |
1462 | */ | |
c8541ecd | 1463 | struct rpc_xprt *xs_setup_tcp(struct sockaddr *addr, size_t addrlen, struct rpc_timeout *to) |
a246b010 | 1464 | { |
c8541ecd | 1465 | struct rpc_xprt *xprt; |
a246b010 | 1466 | |
c8541ecd CL |
1467 | xprt = xs_setup_xprt(addr, addrlen, xprt_tcp_slot_table_entries); |
1468 | if (IS_ERR(xprt)) | |
1469 | return xprt; | |
a246b010 | 1470 | |
c8541ecd | 1471 | if (ntohs(((struct sockaddr_in *)addr)->sin_port) != 0) |
ec739ef0 | 1472 | xprt_set_bound(xprt); |
ec739ef0 CL |
1473 | |
1474 | xprt->prot = IPPROTO_TCP; | |
808012fb | 1475 | xprt->tsh_size = sizeof(rpc_fraghdr) / sizeof(u32); |
808012fb | 1476 | xprt->max_payload = RPC_MAX_FRAGMENT_SIZE; |
a246b010 | 1477 | |
b0d93ad5 | 1478 | INIT_WORK(&xprt->connect_worker, xs_tcp_connect_worker, xprt); |
03bf4b70 CL |
1479 | xprt->bind_timeout = XS_BIND_TO; |
1480 | xprt->connect_timeout = XS_TCP_CONN_TO; | |
1481 | xprt->reestablish_timeout = XS_TCP_INIT_REEST_TO; | |
1482 | xprt->idle_timeout = XS_IDLE_DISC_TO; | |
a246b010 | 1483 | |
262965f5 | 1484 | xprt->ops = &xs_tcp_ops; |
a246b010 CL |
1485 | |
1486 | if (to) | |
1487 | xprt->timeout = *to; | |
1488 | else | |
9903cd1c | 1489 | xprt_set_timeout(&xprt->timeout, 2, 60 * HZ); |
a246b010 | 1490 | |
edb267a6 CL |
1491 | xs_format_peer_addresses(xprt); |
1492 | dprintk("RPC: set up transport to address %s\n", | |
1493 | xs_print_peer_address(xprt, RPC_DISPLAY_ALL)); | |
1494 | ||
c8541ecd | 1495 | return xprt; |
a246b010 | 1496 | } |