Commit | Line | Data |
---|---|---|
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; | |
c8475461 CL |
148 | |
149 | /* | |
150 | * Connection of transports | |
151 | */ | |
152 | struct work_struct connect_worker; | |
153 | unsigned short port; | |
7c6e066e CL |
154 | |
155 | /* | |
156 | * UDP socket buffer size parameters | |
157 | */ | |
158 | size_t rcvsize, | |
159 | sndsize; | |
314dfd79 CL |
160 | |
161 | /* | |
162 | * Saved socket callback addresses | |
163 | */ | |
164 | void (*old_data_ready)(struct sock *, int); | |
165 | void (*old_state_change)(struct sock *); | |
166 | void (*old_write_space)(struct sock *); | |
ffc2e518 CL |
167 | }; |
168 | ||
e136d092 CL |
169 | /* |
170 | * TCP receive state flags | |
171 | */ | |
172 | #define TCP_RCV_LAST_FRAG (1UL << 0) | |
173 | #define TCP_RCV_COPY_FRAGHDR (1UL << 1) | |
174 | #define TCP_RCV_COPY_XID (1UL << 2) | |
175 | #define TCP_RCV_COPY_DATA (1UL << 3) | |
176 | ||
edb267a6 CL |
177 | static void xs_format_peer_addresses(struct rpc_xprt *xprt) |
178 | { | |
179 | struct sockaddr_in *addr = (struct sockaddr_in *) &xprt->addr; | |
180 | char *buf; | |
181 | ||
182 | buf = kzalloc(20, GFP_KERNEL); | |
183 | if (buf) { | |
184 | snprintf(buf, 20, "%u.%u.%u.%u", | |
185 | NIPQUAD(addr->sin_addr.s_addr)); | |
186 | } | |
187 | xprt->address_strings[RPC_DISPLAY_ADDR] = buf; | |
188 | ||
189 | buf = kzalloc(8, GFP_KERNEL); | |
190 | if (buf) { | |
191 | snprintf(buf, 8, "%u", | |
192 | ntohs(addr->sin_port)); | |
193 | } | |
194 | xprt->address_strings[RPC_DISPLAY_PORT] = buf; | |
195 | ||
196 | if (xprt->prot == IPPROTO_UDP) | |
197 | xprt->address_strings[RPC_DISPLAY_PROTO] = "udp"; | |
198 | else | |
199 | xprt->address_strings[RPC_DISPLAY_PROTO] = "tcp"; | |
200 | ||
201 | buf = kzalloc(48, GFP_KERNEL); | |
202 | if (buf) { | |
203 | snprintf(buf, 48, "addr=%u.%u.%u.%u port=%u proto=%s", | |
204 | NIPQUAD(addr->sin_addr.s_addr), | |
205 | ntohs(addr->sin_port), | |
206 | xprt->prot == IPPROTO_UDP ? "udp" : "tcp"); | |
207 | } | |
208 | xprt->address_strings[RPC_DISPLAY_ALL] = buf; | |
209 | } | |
210 | ||
211 | static void xs_free_peer_addresses(struct rpc_xprt *xprt) | |
212 | { | |
213 | kfree(xprt->address_strings[RPC_DISPLAY_ADDR]); | |
214 | kfree(xprt->address_strings[RPC_DISPLAY_PORT]); | |
215 | kfree(xprt->address_strings[RPC_DISPLAY_ALL]); | |
216 | } | |
217 | ||
b4b5cc85 CL |
218 | #define XS_SENDMSG_FLAGS (MSG_DONTWAIT | MSG_NOSIGNAL) |
219 | ||
24c5684b | 220 | static int xs_send_kvec(struct socket *sock, struct sockaddr *addr, int addrlen, struct kvec *vec, unsigned int base, int more) |
b4b5cc85 | 221 | { |
b4b5cc85 CL |
222 | struct msghdr msg = { |
223 | .msg_name = addr, | |
224 | .msg_namelen = addrlen, | |
24c5684b TM |
225 | .msg_flags = XS_SENDMSG_FLAGS | (more ? MSG_MORE : 0), |
226 | }; | |
227 | struct kvec iov = { | |
228 | .iov_base = vec->iov_base + base, | |
229 | .iov_len = vec->iov_len - base, | |
b4b5cc85 CL |
230 | }; |
231 | ||
24c5684b | 232 | if (iov.iov_len != 0) |
b4b5cc85 CL |
233 | return kernel_sendmsg(sock, &msg, &iov, 1, iov.iov_len); |
234 | return kernel_sendmsg(sock, &msg, NULL, 0, 0); | |
235 | } | |
236 | ||
24c5684b | 237 | static int xs_send_pagedata(struct socket *sock, struct xdr_buf *xdr, unsigned int base, int more) |
b4b5cc85 | 238 | { |
24c5684b TM |
239 | struct page **ppage; |
240 | unsigned int remainder; | |
241 | int err, sent = 0; | |
242 | ||
243 | remainder = xdr->page_len - base; | |
244 | base += xdr->page_base; | |
245 | ppage = xdr->pages + (base >> PAGE_SHIFT); | |
246 | base &= ~PAGE_MASK; | |
247 | for(;;) { | |
248 | unsigned int len = min_t(unsigned int, PAGE_SIZE - base, remainder); | |
249 | int flags = XS_SENDMSG_FLAGS; | |
b4b5cc85 | 250 | |
24c5684b TM |
251 | remainder -= len; |
252 | if (remainder != 0 || more) | |
253 | flags |= MSG_MORE; | |
254 | err = sock->ops->sendpage(sock, *ppage, base, len, flags); | |
255 | if (remainder == 0 || err != len) | |
256 | break; | |
257 | sent += err; | |
258 | ppage++; | |
259 | base = 0; | |
260 | } | |
261 | if (sent == 0) | |
262 | return err; | |
263 | if (err > 0) | |
264 | sent += err; | |
265 | return sent; | |
b4b5cc85 CL |
266 | } |
267 | ||
9903cd1c CL |
268 | /** |
269 | * xs_sendpages - write pages directly to a socket | |
270 | * @sock: socket to send on | |
271 | * @addr: UDP only -- address of destination | |
272 | * @addrlen: UDP only -- length of destination address | |
273 | * @xdr: buffer containing this request | |
274 | * @base: starting position in the buffer | |
275 | * | |
a246b010 | 276 | */ |
24c5684b | 277 | static int xs_sendpages(struct socket *sock, struct sockaddr *addr, int addrlen, struct xdr_buf *xdr, unsigned int base) |
a246b010 | 278 | { |
24c5684b TM |
279 | unsigned int remainder = xdr->len - base; |
280 | int err, sent = 0; | |
a246b010 | 281 | |
262965f5 CL |
282 | if (unlikely(!sock)) |
283 | return -ENOTCONN; | |
284 | ||
285 | clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags); | |
24c5684b TM |
286 | if (base != 0) { |
287 | addr = NULL; | |
288 | addrlen = 0; | |
289 | } | |
262965f5 | 290 | |
24c5684b TM |
291 | if (base < xdr->head[0].iov_len || addr != NULL) { |
292 | unsigned int len = xdr->head[0].iov_len - base; | |
293 | remainder -= len; | |
294 | err = xs_send_kvec(sock, addr, addrlen, &xdr->head[0], base, remainder != 0); | |
295 | if (remainder == 0 || err != len) | |
a246b010 | 296 | goto out; |
24c5684b | 297 | sent += err; |
a246b010 CL |
298 | base = 0; |
299 | } else | |
24c5684b | 300 | base -= xdr->head[0].iov_len; |
a246b010 | 301 | |
24c5684b TM |
302 | if (base < xdr->page_len) { |
303 | unsigned int len = xdr->page_len - base; | |
304 | remainder -= len; | |
305 | err = xs_send_pagedata(sock, xdr, base, remainder != 0); | |
306 | if (remainder == 0 || err != len) | |
a246b010 | 307 | goto out; |
24c5684b | 308 | sent += err; |
a246b010 | 309 | base = 0; |
24c5684b TM |
310 | } else |
311 | base -= xdr->page_len; | |
312 | ||
313 | if (base >= xdr->tail[0].iov_len) | |
314 | return sent; | |
315 | err = xs_send_kvec(sock, NULL, 0, &xdr->tail[0], base, 0); | |
a246b010 | 316 | out: |
24c5684b TM |
317 | if (sent == 0) |
318 | return err; | |
319 | if (err > 0) | |
320 | sent += err; | |
321 | return sent; | |
a246b010 CL |
322 | } |
323 | ||
9903cd1c | 324 | /** |
262965f5 CL |
325 | * xs_nospace - place task on wait queue if transmit was incomplete |
326 | * @task: task to put to sleep | |
9903cd1c | 327 | * |
a246b010 | 328 | */ |
262965f5 | 329 | static void xs_nospace(struct rpc_task *task) |
a246b010 | 330 | { |
262965f5 CL |
331 | struct rpc_rqst *req = task->tk_rqstp; |
332 | struct rpc_xprt *xprt = req->rq_xprt; | |
ee0ac0c2 | 333 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
a246b010 | 334 | |
262965f5 CL |
335 | dprintk("RPC: %4d xmit incomplete (%u left of %u)\n", |
336 | task->tk_pid, req->rq_slen - req->rq_bytes_sent, | |
337 | req->rq_slen); | |
338 | ||
ee0ac0c2 | 339 | if (test_bit(SOCK_ASYNC_NOSPACE, &transport->sock->flags)) { |
262965f5 CL |
340 | /* Protect against races with write_space */ |
341 | spin_lock_bh(&xprt->transport_lock); | |
342 | ||
343 | /* Don't race with disconnect */ | |
344 | if (!xprt_connected(xprt)) | |
345 | task->tk_status = -ENOTCONN; | |
ee0ac0c2 | 346 | else if (test_bit(SOCK_NOSPACE, &transport->sock->flags)) |
262965f5 CL |
347 | xprt_wait_for_buffer_space(task); |
348 | ||
349 | spin_unlock_bh(&xprt->transport_lock); | |
350 | } else | |
351 | /* Keep holding the socket if it is blocked */ | |
352 | rpc_delay(task, HZ>>4); | |
353 | } | |
354 | ||
355 | /** | |
356 | * xs_udp_send_request - write an RPC request to a UDP socket | |
357 | * @task: address of RPC task that manages the state of an RPC request | |
358 | * | |
359 | * Return values: | |
360 | * 0: The request has been sent | |
361 | * EAGAIN: The socket was blocked, please call again later to | |
362 | * complete the request | |
363 | * ENOTCONN: Caller needs to invoke connect logic then call again | |
364 | * other: Some other error occured, the request was not sent | |
365 | */ | |
366 | static int xs_udp_send_request(struct rpc_task *task) | |
367 | { | |
368 | struct rpc_rqst *req = task->tk_rqstp; | |
369 | struct rpc_xprt *xprt = req->rq_xprt; | |
ee0ac0c2 | 370 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
262965f5 CL |
371 | struct xdr_buf *xdr = &req->rq_snd_buf; |
372 | int status; | |
a246b010 | 373 | |
9903cd1c | 374 | xs_pktdump("packet data:", |
a246b010 CL |
375 | req->rq_svec->iov_base, |
376 | req->rq_svec->iov_len); | |
377 | ||
262965f5 | 378 | req->rq_xtime = jiffies; |
ee0ac0c2 CL |
379 | status = xs_sendpages(transport->sock, |
380 | (struct sockaddr *) &xprt->addr, | |
381 | xprt->addrlen, xdr, | |
382 | req->rq_bytes_sent); | |
a246b010 | 383 | |
262965f5 CL |
384 | dprintk("RPC: xs_udp_send_request(%u) = %d\n", |
385 | xdr->len - req->rq_bytes_sent, status); | |
a246b010 | 386 | |
262965f5 CL |
387 | if (likely(status >= (int) req->rq_slen)) |
388 | return 0; | |
a246b010 | 389 | |
262965f5 CL |
390 | /* Still some bytes left; set up for a retry later. */ |
391 | if (status > 0) | |
392 | status = -EAGAIN; | |
a246b010 | 393 | |
262965f5 CL |
394 | switch (status) { |
395 | case -ENETUNREACH: | |
396 | case -EPIPE: | |
a246b010 CL |
397 | case -ECONNREFUSED: |
398 | /* When the server has died, an ICMP port unreachable message | |
9903cd1c | 399 | * prompts ECONNREFUSED. */ |
a246b010 | 400 | break; |
262965f5 CL |
401 | case -EAGAIN: |
402 | xs_nospace(task); | |
a246b010 CL |
403 | break; |
404 | default: | |
262965f5 CL |
405 | dprintk("RPC: sendmsg returned unrecognized error %d\n", |
406 | -status); | |
9903cd1c | 407 | break; |
a246b010 | 408 | } |
262965f5 CL |
409 | |
410 | return status; | |
a246b010 CL |
411 | } |
412 | ||
808012fb CL |
413 | static inline void xs_encode_tcp_record_marker(struct xdr_buf *buf) |
414 | { | |
415 | u32 reclen = buf->len - sizeof(rpc_fraghdr); | |
416 | rpc_fraghdr *base = buf->head[0].iov_base; | |
417 | *base = htonl(RPC_LAST_STREAM_FRAGMENT | reclen); | |
418 | } | |
419 | ||
9903cd1c | 420 | /** |
262965f5 | 421 | * xs_tcp_send_request - write an RPC request to a TCP socket |
9903cd1c CL |
422 | * @task: address of RPC task that manages the state of an RPC request |
423 | * | |
424 | * Return values: | |
262965f5 CL |
425 | * 0: The request has been sent |
426 | * EAGAIN: The socket was blocked, please call again later to | |
427 | * complete the request | |
428 | * ENOTCONN: Caller needs to invoke connect logic then call again | |
429 | * other: Some other error occured, the request was not sent | |
9903cd1c CL |
430 | * |
431 | * XXX: In the case of soft timeouts, should we eventually give up | |
262965f5 | 432 | * if sendmsg is not able to make progress? |
9903cd1c | 433 | */ |
262965f5 | 434 | static int xs_tcp_send_request(struct rpc_task *task) |
a246b010 CL |
435 | { |
436 | struct rpc_rqst *req = task->tk_rqstp; | |
437 | struct rpc_xprt *xprt = req->rq_xprt; | |
ee0ac0c2 | 438 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
262965f5 | 439 | struct xdr_buf *xdr = &req->rq_snd_buf; |
a246b010 CL |
440 | int status, retry = 0; |
441 | ||
808012fb | 442 | xs_encode_tcp_record_marker(&req->rq_snd_buf); |
a246b010 | 443 | |
262965f5 CL |
444 | xs_pktdump("packet data:", |
445 | req->rq_svec->iov_base, | |
446 | req->rq_svec->iov_len); | |
a246b010 CL |
447 | |
448 | /* Continue transmitting the packet/record. We must be careful | |
449 | * to cope with writespace callbacks arriving _after_ we have | |
262965f5 | 450 | * called sendmsg(). */ |
a246b010 CL |
451 | while (1) { |
452 | req->rq_xtime = jiffies; | |
ee0ac0c2 CL |
453 | status = xs_sendpages(transport->sock, |
454 | NULL, 0, xdr, req->rq_bytes_sent); | |
a246b010 | 455 | |
262965f5 CL |
456 | dprintk("RPC: xs_tcp_send_request(%u) = %d\n", |
457 | xdr->len - req->rq_bytes_sent, status); | |
a246b010 | 458 | |
262965f5 | 459 | if (unlikely(status < 0)) |
a246b010 | 460 | break; |
a246b010 | 461 | |
262965f5 CL |
462 | /* If we've sent the entire packet, immediately |
463 | * reset the count of bytes sent. */ | |
464 | req->rq_bytes_sent += status; | |
ef759a2e | 465 | task->tk_bytes_sent += status; |
262965f5 CL |
466 | if (likely(req->rq_bytes_sent >= req->rq_slen)) { |
467 | req->rq_bytes_sent = 0; | |
468 | return 0; | |
469 | } | |
a246b010 CL |
470 | |
471 | status = -EAGAIN; | |
262965f5 | 472 | if (retry++ > XS_SENDMSG_RETRY) |
a246b010 CL |
473 | break; |
474 | } | |
475 | ||
262965f5 CL |
476 | switch (status) { |
477 | case -EAGAIN: | |
478 | xs_nospace(task); | |
479 | break; | |
480 | case -ECONNREFUSED: | |
481 | case -ECONNRESET: | |
482 | case -ENOTCONN: | |
483 | case -EPIPE: | |
484 | status = -ENOTCONN; | |
485 | break; | |
486 | default: | |
487 | dprintk("RPC: sendmsg returned unrecognized error %d\n", | |
488 | -status); | |
43118c29 | 489 | xprt_disconnect(xprt); |
262965f5 | 490 | break; |
a246b010 | 491 | } |
262965f5 | 492 | |
a246b010 CL |
493 | return status; |
494 | } | |
495 | ||
e0ab53de TM |
496 | /** |
497 | * xs_tcp_release_xprt - clean up after a tcp transmission | |
498 | * @xprt: transport | |
499 | * @task: rpc task | |
500 | * | |
501 | * This cleans up if an error causes us to abort the transmission of a request. | |
502 | * In this case, the socket may need to be reset in order to avoid confusing | |
503 | * the server. | |
504 | */ | |
505 | static void xs_tcp_release_xprt(struct rpc_xprt *xprt, struct rpc_task *task) | |
506 | { | |
507 | struct rpc_rqst *req; | |
508 | ||
509 | if (task != xprt->snd_task) | |
510 | return; | |
511 | if (task == NULL) | |
512 | goto out_release; | |
513 | req = task->tk_rqstp; | |
514 | if (req->rq_bytes_sent == 0) | |
515 | goto out_release; | |
516 | if (req->rq_bytes_sent == req->rq_snd_buf.len) | |
517 | goto out_release; | |
518 | set_bit(XPRT_CLOSE_WAIT, &task->tk_xprt->state); | |
519 | out_release: | |
520 | xprt_release_xprt(xprt, task); | |
521 | } | |
522 | ||
9903cd1c CL |
523 | /** |
524 | * xs_close - close a socket | |
525 | * @xprt: transport | |
526 | * | |
3167e12c CL |
527 | * This is used when all requests are complete; ie, no DRC state remains |
528 | * on the server we want to save. | |
a246b010 | 529 | */ |
9903cd1c | 530 | static void xs_close(struct rpc_xprt *xprt) |
a246b010 | 531 | { |
ee0ac0c2 CL |
532 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
533 | struct socket *sock = transport->sock; | |
534 | struct sock *sk = transport->inet; | |
a246b010 CL |
535 | |
536 | if (!sk) | |
632e3bdc | 537 | goto clear_close_wait; |
a246b010 | 538 | |
9903cd1c CL |
539 | dprintk("RPC: xs_close xprt %p\n", xprt); |
540 | ||
a246b010 | 541 | write_lock_bh(&sk->sk_callback_lock); |
ee0ac0c2 CL |
542 | transport->inet = NULL; |
543 | transport->sock = NULL; | |
a246b010 | 544 | |
9903cd1c | 545 | sk->sk_user_data = NULL; |
314dfd79 CL |
546 | sk->sk_data_ready = transport->old_data_ready; |
547 | sk->sk_state_change = transport->old_state_change; | |
548 | sk->sk_write_space = transport->old_write_space; | |
a246b010 CL |
549 | write_unlock_bh(&sk->sk_callback_lock); |
550 | ||
9903cd1c | 551 | sk->sk_no_check = 0; |
a246b010 CL |
552 | |
553 | sock_release(sock); | |
632e3bdc TM |
554 | clear_close_wait: |
555 | smp_mb__before_clear_bit(); | |
556 | clear_bit(XPRT_CLOSE_WAIT, &xprt->state); | |
557 | smp_mb__after_clear_bit(); | |
a246b010 CL |
558 | } |
559 | ||
9903cd1c CL |
560 | /** |
561 | * xs_destroy - prepare to shutdown a transport | |
562 | * @xprt: doomed transport | |
563 | * | |
564 | */ | |
565 | static void xs_destroy(struct rpc_xprt *xprt) | |
a246b010 | 566 | { |
c8475461 CL |
567 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
568 | ||
9903cd1c CL |
569 | dprintk("RPC: xs_destroy xprt %p\n", xprt); |
570 | ||
c8475461 | 571 | cancel_delayed_work(&transport->connect_worker); |
a246b010 CL |
572 | flush_scheduled_work(); |
573 | ||
574 | xprt_disconnect(xprt); | |
9903cd1c | 575 | xs_close(xprt); |
edb267a6 | 576 | xs_free_peer_addresses(xprt); |
a246b010 | 577 | kfree(xprt->slot); |
c8541ecd | 578 | kfree(xprt); |
a246b010 CL |
579 | } |
580 | ||
9903cd1c CL |
581 | static inline struct rpc_xprt *xprt_from_sock(struct sock *sk) |
582 | { | |
583 | return (struct rpc_xprt *) sk->sk_user_data; | |
584 | } | |
585 | ||
586 | /** | |
587 | * xs_udp_data_ready - "data ready" callback for UDP sockets | |
588 | * @sk: socket with data to read | |
589 | * @len: how much data to read | |
590 | * | |
a246b010 | 591 | */ |
9903cd1c | 592 | static void xs_udp_data_ready(struct sock *sk, int len) |
a246b010 | 593 | { |
9903cd1c CL |
594 | struct rpc_task *task; |
595 | struct rpc_xprt *xprt; | |
a246b010 | 596 | struct rpc_rqst *rovr; |
9903cd1c | 597 | struct sk_buff *skb; |
a246b010 | 598 | int err, repsize, copied; |
d8ed029d AD |
599 | u32 _xid; |
600 | __be32 *xp; | |
a246b010 CL |
601 | |
602 | read_lock(&sk->sk_callback_lock); | |
9903cd1c CL |
603 | dprintk("RPC: xs_udp_data_ready...\n"); |
604 | if (!(xprt = xprt_from_sock(sk))) | |
a246b010 | 605 | goto out; |
a246b010 CL |
606 | |
607 | if ((skb = skb_recv_datagram(sk, 0, 1, &err)) == NULL) | |
608 | goto out; | |
609 | ||
610 | if (xprt->shutdown) | |
611 | goto dropit; | |
612 | ||
613 | repsize = skb->len - sizeof(struct udphdr); | |
614 | if (repsize < 4) { | |
9903cd1c | 615 | dprintk("RPC: impossible RPC reply size %d!\n", repsize); |
a246b010 CL |
616 | goto dropit; |
617 | } | |
618 | ||
619 | /* Copy the XID from the skb... */ | |
620 | xp = skb_header_pointer(skb, sizeof(struct udphdr), | |
621 | sizeof(_xid), &_xid); | |
622 | if (xp == NULL) | |
623 | goto dropit; | |
624 | ||
625 | /* Look up and lock the request corresponding to the given XID */ | |
4a0f8c04 | 626 | spin_lock(&xprt->transport_lock); |
a246b010 CL |
627 | rovr = xprt_lookup_rqst(xprt, *xp); |
628 | if (!rovr) | |
629 | goto out_unlock; | |
630 | task = rovr->rq_task; | |
631 | ||
a246b010 CL |
632 | if ((copied = rovr->rq_private_buf.buflen) > repsize) |
633 | copied = repsize; | |
634 | ||
635 | /* Suck it into the iovec, verify checksum if not done by hw. */ | |
636 | if (csum_partial_copy_to_xdr(&rovr->rq_private_buf, skb)) | |
637 | goto out_unlock; | |
638 | ||
639 | /* Something worked... */ | |
640 | dst_confirm(skb->dst); | |
641 | ||
1570c1e4 CL |
642 | xprt_adjust_cwnd(task, copied); |
643 | xprt_update_rtt(task); | |
644 | xprt_complete_rqst(task, copied); | |
a246b010 CL |
645 | |
646 | out_unlock: | |
4a0f8c04 | 647 | spin_unlock(&xprt->transport_lock); |
a246b010 CL |
648 | dropit: |
649 | skb_free_datagram(sk, skb); | |
650 | out: | |
651 | read_unlock(&sk->sk_callback_lock); | |
652 | } | |
653 | ||
9903cd1c | 654 | static inline void xs_tcp_read_fraghdr(struct rpc_xprt *xprt, skb_reader_t *desc) |
a246b010 | 655 | { |
51971139 | 656 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
a246b010 CL |
657 | size_t len, used; |
658 | char *p; | |
659 | ||
51971139 CL |
660 | p = ((char *) &transport->tcp_fraghdr) + transport->tcp_offset; |
661 | len = sizeof(transport->tcp_fraghdr) - transport->tcp_offset; | |
9d292316 | 662 | used = xdr_skb_read_bits(desc, p, len); |
51971139 | 663 | transport->tcp_offset += used; |
a246b010 CL |
664 | if (used != len) |
665 | return; | |
808012fb | 666 | |
51971139 CL |
667 | transport->tcp_reclen = ntohl(transport->tcp_fraghdr); |
668 | if (transport->tcp_reclen & RPC_LAST_STREAM_FRAGMENT) | |
e136d092 | 669 | transport->tcp_flags |= TCP_RCV_LAST_FRAG; |
a246b010 | 670 | else |
e136d092 | 671 | transport->tcp_flags &= ~TCP_RCV_LAST_FRAG; |
51971139 | 672 | transport->tcp_reclen &= RPC_FRAGMENT_SIZE_MASK; |
808012fb | 673 | |
e136d092 | 674 | transport->tcp_flags &= ~TCP_RCV_COPY_FRAGHDR; |
51971139 | 675 | transport->tcp_offset = 0; |
808012fb | 676 | |
a246b010 | 677 | /* Sanity check of the record length */ |
51971139 | 678 | if (unlikely(transport->tcp_reclen < 4)) { |
9903cd1c | 679 | dprintk("RPC: invalid TCP record fragment length\n"); |
a246b010 | 680 | xprt_disconnect(xprt); |
9903cd1c | 681 | return; |
a246b010 CL |
682 | } |
683 | dprintk("RPC: reading TCP record fragment of length %d\n", | |
51971139 | 684 | transport->tcp_reclen); |
a246b010 CL |
685 | } |
686 | ||
51971139 | 687 | static void xs_tcp_check_fraghdr(struct sock_xprt *transport) |
a246b010 | 688 | { |
51971139 | 689 | if (transport->tcp_offset == transport->tcp_reclen) { |
e136d092 | 690 | transport->tcp_flags |= TCP_RCV_COPY_FRAGHDR; |
51971139 | 691 | transport->tcp_offset = 0; |
e136d092 CL |
692 | if (transport->tcp_flags & TCP_RCV_LAST_FRAG) { |
693 | transport->tcp_flags &= ~TCP_RCV_COPY_DATA; | |
694 | transport->tcp_flags |= TCP_RCV_COPY_XID; | |
51971139 | 695 | transport->tcp_copied = 0; |
a246b010 CL |
696 | } |
697 | } | |
698 | } | |
699 | ||
51971139 | 700 | static inline void xs_tcp_read_xid(struct sock_xprt *transport, skb_reader_t *desc) |
a246b010 CL |
701 | { |
702 | size_t len, used; | |
703 | char *p; | |
704 | ||
51971139 | 705 | len = sizeof(transport->tcp_xid) - transport->tcp_offset; |
a246b010 | 706 | dprintk("RPC: reading XID (%Zu bytes)\n", len); |
51971139 | 707 | p = ((char *) &transport->tcp_xid) + transport->tcp_offset; |
9d292316 | 708 | used = xdr_skb_read_bits(desc, p, len); |
51971139 | 709 | transport->tcp_offset += used; |
a246b010 CL |
710 | if (used != len) |
711 | return; | |
e136d092 CL |
712 | transport->tcp_flags &= ~TCP_RCV_COPY_XID; |
713 | transport->tcp_flags |= TCP_RCV_COPY_DATA; | |
51971139 | 714 | transport->tcp_copied = 4; |
a246b010 | 715 | dprintk("RPC: reading reply for XID %08x\n", |
51971139 CL |
716 | ntohl(transport->tcp_xid)); |
717 | xs_tcp_check_fraghdr(transport); | |
a246b010 CL |
718 | } |
719 | ||
9903cd1c | 720 | static inline void xs_tcp_read_request(struct rpc_xprt *xprt, skb_reader_t *desc) |
a246b010 | 721 | { |
51971139 | 722 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
a246b010 CL |
723 | struct rpc_rqst *req; |
724 | struct xdr_buf *rcvbuf; | |
725 | size_t len; | |
726 | ssize_t r; | |
727 | ||
728 | /* Find and lock the request corresponding to this xid */ | |
4a0f8c04 | 729 | spin_lock(&xprt->transport_lock); |
51971139 | 730 | req = xprt_lookup_rqst(xprt, transport->tcp_xid); |
a246b010 | 731 | if (!req) { |
e136d092 | 732 | transport->tcp_flags &= ~TCP_RCV_COPY_DATA; |
a246b010 | 733 | dprintk("RPC: XID %08x request not found!\n", |
51971139 | 734 | ntohl(transport->tcp_xid)); |
4a0f8c04 | 735 | spin_unlock(&xprt->transport_lock); |
a246b010 CL |
736 | return; |
737 | } | |
738 | ||
739 | rcvbuf = &req->rq_private_buf; | |
740 | len = desc->count; | |
51971139 | 741 | if (len > transport->tcp_reclen - transport->tcp_offset) { |
a246b010 CL |
742 | skb_reader_t my_desc; |
743 | ||
51971139 | 744 | len = transport->tcp_reclen - transport->tcp_offset; |
a246b010 CL |
745 | memcpy(&my_desc, desc, sizeof(my_desc)); |
746 | my_desc.count = len; | |
51971139 | 747 | r = xdr_partial_copy_from_skb(rcvbuf, transport->tcp_copied, |
9d292316 | 748 | &my_desc, xdr_skb_read_bits); |
a246b010 CL |
749 | desc->count -= r; |
750 | desc->offset += r; | |
751 | } else | |
51971139 | 752 | r = xdr_partial_copy_from_skb(rcvbuf, transport->tcp_copied, |
9d292316 | 753 | desc, xdr_skb_read_bits); |
a246b010 CL |
754 | |
755 | if (r > 0) { | |
51971139 CL |
756 | transport->tcp_copied += r; |
757 | transport->tcp_offset += r; | |
a246b010 CL |
758 | } |
759 | if (r != len) { | |
760 | /* Error when copying to the receive buffer, | |
761 | * usually because we weren't able to allocate | |
762 | * additional buffer pages. All we can do now | |
e136d092 | 763 | * is turn off TCP_RCV_COPY_DATA, so the request |
a246b010 CL |
764 | * will not receive any additional updates, |
765 | * and time out. | |
766 | * Any remaining data from this record will | |
767 | * be discarded. | |
768 | */ | |
e136d092 | 769 | transport->tcp_flags &= ~TCP_RCV_COPY_DATA; |
a246b010 | 770 | dprintk("RPC: XID %08x truncated request\n", |
51971139 | 771 | ntohl(transport->tcp_xid)); |
a246b010 | 772 | dprintk("RPC: xprt = %p, tcp_copied = %lu, tcp_offset = %u, tcp_reclen = %u\n", |
51971139 CL |
773 | xprt, transport->tcp_copied, transport->tcp_offset, |
774 | transport->tcp_reclen); | |
a246b010 CL |
775 | goto out; |
776 | } | |
777 | ||
778 | dprintk("RPC: XID %08x read %Zd bytes\n", | |
51971139 | 779 | ntohl(transport->tcp_xid), r); |
a246b010 | 780 | dprintk("RPC: xprt = %p, tcp_copied = %lu, tcp_offset = %u, tcp_reclen = %u\n", |
51971139 CL |
781 | xprt, transport->tcp_copied, transport->tcp_offset, |
782 | transport->tcp_reclen); | |
783 | ||
784 | if (transport->tcp_copied == req->rq_private_buf.buflen) | |
e136d092 | 785 | transport->tcp_flags &= ~TCP_RCV_COPY_DATA; |
51971139 | 786 | else if (transport->tcp_offset == transport->tcp_reclen) { |
e136d092 CL |
787 | if (transport->tcp_flags & TCP_RCV_LAST_FRAG) |
788 | transport->tcp_flags &= ~TCP_RCV_COPY_DATA; | |
a246b010 CL |
789 | } |
790 | ||
791 | out: | |
e136d092 | 792 | if (!(transport->tcp_flags & TCP_RCV_COPY_DATA)) |
51971139 | 793 | xprt_complete_rqst(req->rq_task, transport->tcp_copied); |
4a0f8c04 | 794 | spin_unlock(&xprt->transport_lock); |
51971139 | 795 | xs_tcp_check_fraghdr(transport); |
a246b010 CL |
796 | } |
797 | ||
51971139 | 798 | static inline void xs_tcp_read_discard(struct sock_xprt *transport, skb_reader_t *desc) |
a246b010 CL |
799 | { |
800 | size_t len; | |
801 | ||
51971139 | 802 | len = transport->tcp_reclen - transport->tcp_offset; |
a246b010 CL |
803 | if (len > desc->count) |
804 | len = desc->count; | |
805 | desc->count -= len; | |
806 | desc->offset += len; | |
51971139 | 807 | transport->tcp_offset += len; |
a246b010 | 808 | dprintk("RPC: discarded %Zu bytes\n", len); |
51971139 | 809 | xs_tcp_check_fraghdr(transport); |
a246b010 CL |
810 | } |
811 | ||
9903cd1c | 812 | static int xs_tcp_data_recv(read_descriptor_t *rd_desc, struct sk_buff *skb, unsigned int offset, size_t len) |
a246b010 CL |
813 | { |
814 | struct rpc_xprt *xprt = rd_desc->arg.data; | |
51971139 | 815 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
a246b010 CL |
816 | skb_reader_t desc = { |
817 | .skb = skb, | |
818 | .offset = offset, | |
819 | .count = len, | |
9903cd1c | 820 | }; |
a246b010 | 821 | |
9903cd1c | 822 | dprintk("RPC: xs_tcp_data_recv started\n"); |
a246b010 CL |
823 | do { |
824 | /* Read in a new fragment marker if necessary */ | |
825 | /* Can we ever really expect to get completely empty fragments? */ | |
e136d092 | 826 | if (transport->tcp_flags & TCP_RCV_COPY_FRAGHDR) { |
9903cd1c | 827 | xs_tcp_read_fraghdr(xprt, &desc); |
a246b010 CL |
828 | continue; |
829 | } | |
830 | /* Read in the xid if necessary */ | |
e136d092 | 831 | if (transport->tcp_flags & TCP_RCV_COPY_XID) { |
51971139 | 832 | xs_tcp_read_xid(transport, &desc); |
a246b010 CL |
833 | continue; |
834 | } | |
835 | /* Read in the request data */ | |
e136d092 | 836 | if (transport->tcp_flags & TCP_RCV_COPY_DATA) { |
9903cd1c | 837 | xs_tcp_read_request(xprt, &desc); |
a246b010 CL |
838 | continue; |
839 | } | |
840 | /* Skip over any trailing bytes on short reads */ | |
51971139 | 841 | xs_tcp_read_discard(transport, &desc); |
a246b010 | 842 | } while (desc.count); |
9903cd1c | 843 | dprintk("RPC: xs_tcp_data_recv done\n"); |
a246b010 CL |
844 | return len - desc.count; |
845 | } | |
846 | ||
9903cd1c CL |
847 | /** |
848 | * xs_tcp_data_ready - "data ready" callback for TCP sockets | |
849 | * @sk: socket with data to read | |
850 | * @bytes: how much data to read | |
851 | * | |
852 | */ | |
853 | static void xs_tcp_data_ready(struct sock *sk, int bytes) | |
a246b010 CL |
854 | { |
855 | struct rpc_xprt *xprt; | |
856 | read_descriptor_t rd_desc; | |
857 | ||
858 | read_lock(&sk->sk_callback_lock); | |
9903cd1c CL |
859 | dprintk("RPC: xs_tcp_data_ready...\n"); |
860 | if (!(xprt = xprt_from_sock(sk))) | |
a246b010 | 861 | goto out; |
a246b010 CL |
862 | if (xprt->shutdown) |
863 | goto out; | |
864 | ||
9903cd1c | 865 | /* We use rd_desc to pass struct xprt to xs_tcp_data_recv */ |
a246b010 CL |
866 | rd_desc.arg.data = xprt; |
867 | rd_desc.count = 65536; | |
9903cd1c | 868 | tcp_read_sock(sk, &rd_desc, xs_tcp_data_recv); |
a246b010 CL |
869 | out: |
870 | read_unlock(&sk->sk_callback_lock); | |
871 | } | |
872 | ||
9903cd1c CL |
873 | /** |
874 | * xs_tcp_state_change - callback to handle TCP socket state changes | |
875 | * @sk: socket whose state has changed | |
876 | * | |
877 | */ | |
878 | static void xs_tcp_state_change(struct sock *sk) | |
a246b010 | 879 | { |
9903cd1c | 880 | struct rpc_xprt *xprt; |
a246b010 CL |
881 | |
882 | read_lock(&sk->sk_callback_lock); | |
883 | if (!(xprt = xprt_from_sock(sk))) | |
884 | goto out; | |
9903cd1c | 885 | dprintk("RPC: xs_tcp_state_change client %p...\n", xprt); |
a246b010 CL |
886 | dprintk("RPC: state %x conn %d dead %d zapped %d\n", |
887 | sk->sk_state, xprt_connected(xprt), | |
888 | sock_flag(sk, SOCK_DEAD), | |
889 | sock_flag(sk, SOCK_ZAPPED)); | |
890 | ||
891 | switch (sk->sk_state) { | |
892 | case TCP_ESTABLISHED: | |
4a0f8c04 | 893 | spin_lock_bh(&xprt->transport_lock); |
a246b010 | 894 | if (!xprt_test_and_set_connected(xprt)) { |
51971139 CL |
895 | struct sock_xprt *transport = container_of(xprt, |
896 | struct sock_xprt, xprt); | |
897 | ||
a246b010 | 898 | /* Reset TCP record info */ |
51971139 CL |
899 | transport->tcp_offset = 0; |
900 | transport->tcp_reclen = 0; | |
901 | transport->tcp_copied = 0; | |
e136d092 CL |
902 | transport->tcp_flags = |
903 | TCP_RCV_COPY_FRAGHDR | TCP_RCV_COPY_XID; | |
51971139 | 904 | |
03bf4b70 | 905 | xprt->reestablish_timeout = XS_TCP_INIT_REEST_TO; |
44fbac22 | 906 | xprt_wake_pending_tasks(xprt, 0); |
a246b010 | 907 | } |
4a0f8c04 | 908 | spin_unlock_bh(&xprt->transport_lock); |
a246b010 CL |
909 | break; |
910 | case TCP_SYN_SENT: | |
911 | case TCP_SYN_RECV: | |
912 | break; | |
632e3bdc TM |
913 | case TCP_CLOSE_WAIT: |
914 | /* Try to schedule an autoclose RPC calls */ | |
915 | set_bit(XPRT_CLOSE_WAIT, &xprt->state); | |
916 | if (test_and_set_bit(XPRT_LOCKED, &xprt->state) == 0) | |
917 | schedule_work(&xprt->task_cleanup); | |
a246b010 CL |
918 | default: |
919 | xprt_disconnect(xprt); | |
a246b010 CL |
920 | } |
921 | out: | |
922 | read_unlock(&sk->sk_callback_lock); | |
923 | } | |
924 | ||
9903cd1c | 925 | /** |
c7b2cae8 CL |
926 | * xs_udp_write_space - callback invoked when socket buffer space |
927 | * becomes available | |
9903cd1c CL |
928 | * @sk: socket whose state has changed |
929 | * | |
a246b010 CL |
930 | * Called when more output buffer space is available for this socket. |
931 | * We try not to wake our writers until they can make "significant" | |
c7b2cae8 | 932 | * progress, otherwise we'll waste resources thrashing kernel_sendmsg |
a246b010 CL |
933 | * with a bunch of small requests. |
934 | */ | |
c7b2cae8 | 935 | static void xs_udp_write_space(struct sock *sk) |
a246b010 | 936 | { |
a246b010 | 937 | read_lock(&sk->sk_callback_lock); |
a246b010 | 938 | |
c7b2cae8 CL |
939 | /* from net/core/sock.c:sock_def_write_space */ |
940 | if (sock_writeable(sk)) { | |
941 | struct socket *sock; | |
942 | struct rpc_xprt *xprt; | |
943 | ||
944 | if (unlikely(!(sock = sk->sk_socket))) | |
a246b010 | 945 | goto out; |
c7b2cae8 CL |
946 | if (unlikely(!(xprt = xprt_from_sock(sk)))) |
947 | goto out; | |
948 | if (unlikely(!test_and_clear_bit(SOCK_NOSPACE, &sock->flags))) | |
a246b010 | 949 | goto out; |
c7b2cae8 CL |
950 | |
951 | xprt_write_space(xprt); | |
a246b010 CL |
952 | } |
953 | ||
c7b2cae8 CL |
954 | out: |
955 | read_unlock(&sk->sk_callback_lock); | |
956 | } | |
a246b010 | 957 | |
c7b2cae8 CL |
958 | /** |
959 | * xs_tcp_write_space - callback invoked when socket buffer space | |
960 | * becomes available | |
961 | * @sk: socket whose state has changed | |
962 | * | |
963 | * Called when more output buffer space is available for this socket. | |
964 | * We try not to wake our writers until they can make "significant" | |
965 | * progress, otherwise we'll waste resources thrashing kernel_sendmsg | |
966 | * with a bunch of small requests. | |
967 | */ | |
968 | static void xs_tcp_write_space(struct sock *sk) | |
969 | { | |
970 | read_lock(&sk->sk_callback_lock); | |
971 | ||
972 | /* from net/core/stream.c:sk_stream_write_space */ | |
973 | if (sk_stream_wspace(sk) >= sk_stream_min_wspace(sk)) { | |
974 | struct socket *sock; | |
975 | struct rpc_xprt *xprt; | |
976 | ||
977 | if (unlikely(!(sock = sk->sk_socket))) | |
978 | goto out; | |
979 | if (unlikely(!(xprt = xprt_from_sock(sk)))) | |
980 | goto out; | |
981 | if (unlikely(!test_and_clear_bit(SOCK_NOSPACE, &sock->flags))) | |
982 | goto out; | |
983 | ||
984 | xprt_write_space(xprt); | |
985 | } | |
986 | ||
987 | out: | |
a246b010 CL |
988 | read_unlock(&sk->sk_callback_lock); |
989 | } | |
990 | ||
470056c2 | 991 | static void xs_udp_do_set_buffer_size(struct rpc_xprt *xprt) |
a246b010 | 992 | { |
ee0ac0c2 CL |
993 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
994 | struct sock *sk = transport->inet; | |
a246b010 | 995 | |
7c6e066e | 996 | if (transport->rcvsize) { |
a246b010 | 997 | sk->sk_userlocks |= SOCK_RCVBUF_LOCK; |
7c6e066e | 998 | sk->sk_rcvbuf = transport->rcvsize * xprt->max_reqs * 2; |
a246b010 | 999 | } |
7c6e066e | 1000 | if (transport->sndsize) { |
a246b010 | 1001 | sk->sk_userlocks |= SOCK_SNDBUF_LOCK; |
7c6e066e | 1002 | sk->sk_sndbuf = transport->sndsize * xprt->max_reqs * 2; |
a246b010 CL |
1003 | sk->sk_write_space(sk); |
1004 | } | |
1005 | } | |
1006 | ||
43118c29 | 1007 | /** |
470056c2 | 1008 | * xs_udp_set_buffer_size - set send and receive limits |
43118c29 | 1009 | * @xprt: generic transport |
470056c2 CL |
1010 | * @sndsize: requested size of send buffer, in bytes |
1011 | * @rcvsize: requested size of receive buffer, in bytes | |
43118c29 | 1012 | * |
470056c2 | 1013 | * Set socket send and receive buffer size limits. |
43118c29 | 1014 | */ |
470056c2 | 1015 | static void xs_udp_set_buffer_size(struct rpc_xprt *xprt, size_t sndsize, size_t rcvsize) |
43118c29 | 1016 | { |
7c6e066e CL |
1017 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
1018 | ||
1019 | transport->sndsize = 0; | |
470056c2 | 1020 | if (sndsize) |
7c6e066e CL |
1021 | transport->sndsize = sndsize + 1024; |
1022 | transport->rcvsize = 0; | |
470056c2 | 1023 | if (rcvsize) |
7c6e066e | 1024 | transport->rcvsize = rcvsize + 1024; |
470056c2 CL |
1025 | |
1026 | xs_udp_do_set_buffer_size(xprt); | |
43118c29 CL |
1027 | } |
1028 | ||
46c0ee8b CL |
1029 | /** |
1030 | * xs_udp_timer - called when a retransmit timeout occurs on a UDP transport | |
1031 | * @task: task that timed out | |
1032 | * | |
1033 | * Adjust the congestion window after a retransmit timeout has occurred. | |
1034 | */ | |
1035 | static void xs_udp_timer(struct rpc_task *task) | |
1036 | { | |
1037 | xprt_adjust_cwnd(task, -ETIMEDOUT); | |
1038 | } | |
1039 | ||
b85d8806 CL |
1040 | static unsigned short xs_get_random_port(void) |
1041 | { | |
1042 | unsigned short range = xprt_max_resvport - xprt_min_resvport; | |
1043 | unsigned short rand = (unsigned short) net_random() % range; | |
1044 | return rand + xprt_min_resvport; | |
1045 | } | |
1046 | ||
92200412 CL |
1047 | /** |
1048 | * xs_set_port - reset the port number in the remote endpoint address | |
1049 | * @xprt: generic transport | |
1050 | * @port: new port number | |
1051 | * | |
1052 | */ | |
1053 | static void xs_set_port(struct rpc_xprt *xprt, unsigned short port) | |
1054 | { | |
c4efcb1d CL |
1055 | struct sockaddr_in *sap = (struct sockaddr_in *) &xprt->addr; |
1056 | ||
92200412 | 1057 | dprintk("RPC: setting port for xprt %p to %u\n", xprt, port); |
c4efcb1d CL |
1058 | |
1059 | sap->sin_port = htons(port); | |
92200412 CL |
1060 | } |
1061 | ||
c8475461 | 1062 | static int xs_bindresvport(struct sock_xprt *transport, struct socket *sock) |
a246b010 CL |
1063 | { |
1064 | struct sockaddr_in myaddr = { | |
1065 | .sin_family = AF_INET, | |
1066 | }; | |
529b33c6 | 1067 | int err; |
c8475461 | 1068 | unsigned short port = transport->port; |
a246b010 | 1069 | |
a246b010 CL |
1070 | do { |
1071 | myaddr.sin_port = htons(port); | |
e6242e92 | 1072 | err = kernel_bind(sock, (struct sockaddr *) &myaddr, |
a246b010 CL |
1073 | sizeof(myaddr)); |
1074 | if (err == 0) { | |
c8475461 | 1075 | transport->port = port; |
9903cd1c CL |
1076 | dprintk("RPC: xs_bindresvport bound to port %u\n", |
1077 | port); | |
a246b010 CL |
1078 | return 0; |
1079 | } | |
529b33c6 CL |
1080 | if (port <= xprt_min_resvport) |
1081 | port = xprt_max_resvport; | |
1082 | else | |
1083 | port--; | |
c8475461 | 1084 | } while (err == -EADDRINUSE && port != transport->port); |
a246b010 | 1085 | |
9903cd1c | 1086 | dprintk("RPC: can't bind to reserved port (%d).\n", -err); |
a246b010 CL |
1087 | return err; |
1088 | } | |
1089 | ||
b0d93ad5 CL |
1090 | /** |
1091 | * xs_udp_connect_worker - set up a UDP socket | |
1092 | * @args: RPC transport to connect | |
1093 | * | |
1094 | * Invoked by a work queue tasklet. | |
1095 | */ | |
1096 | static void xs_udp_connect_worker(void *args) | |
a246b010 | 1097 | { |
c8475461 CL |
1098 | struct sock_xprt *transport = (struct sock_xprt *)args; |
1099 | struct rpc_xprt *xprt = &transport->xprt; | |
ee0ac0c2 | 1100 | struct socket *sock = transport->sock; |
b0d93ad5 | 1101 | int err, status = -EIO; |
9903cd1c | 1102 | |
ec739ef0 | 1103 | if (xprt->shutdown || !xprt_bound(xprt)) |
b0d93ad5 | 1104 | goto out; |
9903cd1c | 1105 | |
b0d93ad5 CL |
1106 | /* Start by resetting any existing state */ |
1107 | xs_close(xprt); | |
9903cd1c | 1108 | |
b0d93ad5 CL |
1109 | if ((err = sock_create_kern(PF_INET, SOCK_DGRAM, IPPROTO_UDP, &sock)) < 0) { |
1110 | dprintk("RPC: can't create UDP transport socket (%d).\n", -err); | |
1111 | goto out; | |
1112 | } | |
9903cd1c | 1113 | |
c8475461 | 1114 | if (xprt->resvport && xs_bindresvport(transport, sock) < 0) { |
b0d93ad5 CL |
1115 | sock_release(sock); |
1116 | goto out; | |
1117 | } | |
9903cd1c | 1118 | |
edb267a6 | 1119 | dprintk("RPC: worker connecting xprt %p to address: %s\n", |
7559c7a2 | 1120 | xprt, xprt->address_strings[RPC_DISPLAY_ALL]); |
edb267a6 | 1121 | |
ee0ac0c2 | 1122 | if (!transport->inet) { |
b0d93ad5 | 1123 | struct sock *sk = sock->sk; |
a246b010 | 1124 | |
b0d93ad5 | 1125 | write_lock_bh(&sk->sk_callback_lock); |
a246b010 | 1126 | |
b0d93ad5 | 1127 | sk->sk_user_data = xprt; |
314dfd79 CL |
1128 | transport->old_data_ready = sk->sk_data_ready; |
1129 | transport->old_state_change = sk->sk_state_change; | |
1130 | transport->old_write_space = sk->sk_write_space; | |
9903cd1c | 1131 | sk->sk_data_ready = xs_udp_data_ready; |
c7b2cae8 | 1132 | sk->sk_write_space = xs_udp_write_space; |
a246b010 | 1133 | sk->sk_no_check = UDP_CSUM_NORCV; |
b079fa7b | 1134 | sk->sk_allocation = GFP_ATOMIC; |
b0d93ad5 | 1135 | |
a246b010 | 1136 | xprt_set_connected(xprt); |
a246b010 | 1137 | |
b0d93ad5 | 1138 | /* Reset to new socket */ |
ee0ac0c2 CL |
1139 | transport->sock = sock; |
1140 | transport->inet = sk; | |
a246b010 | 1141 | |
b0d93ad5 CL |
1142 | write_unlock_bh(&sk->sk_callback_lock); |
1143 | } | |
470056c2 | 1144 | xs_udp_do_set_buffer_size(xprt); |
b0d93ad5 CL |
1145 | status = 0; |
1146 | out: | |
1147 | xprt_wake_pending_tasks(xprt, status); | |
1148 | xprt_clear_connecting(xprt); | |
a246b010 CL |
1149 | } |
1150 | ||
3167e12c CL |
1151 | /* |
1152 | * We need to preserve the port number so the reply cache on the server can | |
1153 | * find our cached RPC replies when we get around to reconnecting. | |
1154 | */ | |
1155 | static void xs_tcp_reuse_connection(struct rpc_xprt *xprt) | |
1156 | { | |
1157 | int result; | |
ee0ac0c2 | 1158 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
3167e12c CL |
1159 | struct sockaddr any; |
1160 | ||
1161 | dprintk("RPC: disconnecting xprt %p to reuse port\n", xprt); | |
1162 | ||
1163 | /* | |
1164 | * Disconnect the transport socket by doing a connect operation | |
1165 | * with AF_UNSPEC. This should return immediately... | |
1166 | */ | |
1167 | memset(&any, 0, sizeof(any)); | |
1168 | any.sa_family = AF_UNSPEC; | |
ee0ac0c2 | 1169 | result = kernel_connect(transport->sock, &any, sizeof(any), 0); |
3167e12c CL |
1170 | if (result) |
1171 | dprintk("RPC: AF_UNSPEC connect return code %d\n", | |
1172 | result); | |
1173 | } | |
1174 | ||
9903cd1c | 1175 | /** |
b0d93ad5 | 1176 | * xs_tcp_connect_worker - connect a TCP socket to a remote endpoint |
9903cd1c CL |
1177 | * @args: RPC transport to connect |
1178 | * | |
1179 | * Invoked by a work queue tasklet. | |
a246b010 | 1180 | */ |
b0d93ad5 | 1181 | static void xs_tcp_connect_worker(void *args) |
a246b010 | 1182 | { |
c8475461 CL |
1183 | struct sock_xprt *transport = (struct sock_xprt *)args; |
1184 | struct rpc_xprt *xprt = &transport->xprt; | |
ee0ac0c2 | 1185 | struct socket *sock = transport->sock; |
b0d93ad5 | 1186 | int err, status = -EIO; |
a246b010 | 1187 | |
ec739ef0 | 1188 | if (xprt->shutdown || !xprt_bound(xprt)) |
a246b010 CL |
1189 | goto out; |
1190 | ||
ee0ac0c2 | 1191 | if (!sock) { |
3167e12c CL |
1192 | /* start from scratch */ |
1193 | if ((err = sock_create_kern(PF_INET, SOCK_STREAM, IPPROTO_TCP, &sock)) < 0) { | |
1194 | dprintk("RPC: can't create TCP transport socket (%d).\n", -err); | |
1195 | goto out; | |
1196 | } | |
a246b010 | 1197 | |
c8475461 | 1198 | if (xprt->resvport && xs_bindresvport(transport, sock) < 0) { |
3167e12c CL |
1199 | sock_release(sock); |
1200 | goto out; | |
1201 | } | |
1202 | } else | |
1203 | /* "close" the socket, preserving the local port */ | |
1204 | xs_tcp_reuse_connection(xprt); | |
a246b010 | 1205 | |
edb267a6 | 1206 | dprintk("RPC: worker connecting xprt %p to address: %s\n", |
7559c7a2 | 1207 | xprt, xprt->address_strings[RPC_DISPLAY_ALL]); |
edb267a6 | 1208 | |
ee0ac0c2 | 1209 | if (!transport->inet) { |
b0d93ad5 CL |
1210 | struct sock *sk = sock->sk; |
1211 | ||
1212 | write_lock_bh(&sk->sk_callback_lock); | |
1213 | ||
1214 | sk->sk_user_data = xprt; | |
314dfd79 CL |
1215 | transport->old_data_ready = sk->sk_data_ready; |
1216 | transport->old_state_change = sk->sk_state_change; | |
1217 | transport->old_write_space = sk->sk_write_space; | |
b0d93ad5 CL |
1218 | sk->sk_data_ready = xs_tcp_data_ready; |
1219 | sk->sk_state_change = xs_tcp_state_change; | |
1220 | sk->sk_write_space = xs_tcp_write_space; | |
b079fa7b | 1221 | sk->sk_allocation = GFP_ATOMIC; |
3167e12c CL |
1222 | |
1223 | /* socket options */ | |
1224 | sk->sk_userlocks |= SOCK_BINDPORT_LOCK; | |
1225 | sock_reset_flag(sk, SOCK_LINGER); | |
1226 | tcp_sk(sk)->linger2 = 0; | |
1227 | tcp_sk(sk)->nonagle |= TCP_NAGLE_OFF; | |
b0d93ad5 CL |
1228 | |
1229 | xprt_clear_connected(xprt); | |
1230 | ||
1231 | /* Reset to new socket */ | |
ee0ac0c2 CL |
1232 | transport->sock = sock; |
1233 | transport->inet = sk; | |
b0d93ad5 CL |
1234 | |
1235 | write_unlock_bh(&sk->sk_callback_lock); | |
1236 | } | |
1237 | ||
1238 | /* Tell the socket layer to start connecting... */ | |
262ca07d CL |
1239 | xprt->stat.connect_count++; |
1240 | xprt->stat.connect_start = jiffies; | |
e6242e92 | 1241 | status = kernel_connect(sock, (struct sockaddr *) &xprt->addr, |
c4efcb1d | 1242 | xprt->addrlen, O_NONBLOCK); |
a246b010 CL |
1243 | dprintk("RPC: %p connect status %d connected %d sock state %d\n", |
1244 | xprt, -status, xprt_connected(xprt), sock->sk->sk_state); | |
1245 | if (status < 0) { | |
1246 | switch (status) { | |
1247 | case -EINPROGRESS: | |
1248 | case -EALREADY: | |
1249 | goto out_clear; | |
3167e12c CL |
1250 | case -ECONNREFUSED: |
1251 | case -ECONNRESET: | |
1252 | /* retry with existing socket, after a delay */ | |
1253 | break; | |
1254 | default: | |
1255 | /* get rid of existing socket, and retry */ | |
1256 | xs_close(xprt); | |
1257 | break; | |
a246b010 CL |
1258 | } |
1259 | } | |
1260 | out: | |
44fbac22 | 1261 | xprt_wake_pending_tasks(xprt, status); |
a246b010 | 1262 | out_clear: |
2226feb6 | 1263 | xprt_clear_connecting(xprt); |
a246b010 CL |
1264 | } |
1265 | ||
9903cd1c CL |
1266 | /** |
1267 | * xs_connect - connect a socket to a remote endpoint | |
1268 | * @task: address of RPC task that manages state of connect request | |
1269 | * | |
1270 | * TCP: If the remote end dropped the connection, delay reconnecting. | |
03bf4b70 CL |
1271 | * |
1272 | * UDP socket connects are synchronous, but we use a work queue anyway | |
1273 | * to guarantee that even unprivileged user processes can set up a | |
1274 | * socket on a privileged port. | |
1275 | * | |
1276 | * If a UDP socket connect fails, the delay behavior here prevents | |
1277 | * retry floods (hard mounts). | |
9903cd1c CL |
1278 | */ |
1279 | static void xs_connect(struct rpc_task *task) | |
a246b010 CL |
1280 | { |
1281 | struct rpc_xprt *xprt = task->tk_xprt; | |
ee0ac0c2 | 1282 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
a246b010 | 1283 | |
b0d93ad5 CL |
1284 | if (xprt_test_and_set_connecting(xprt)) |
1285 | return; | |
1286 | ||
ee0ac0c2 | 1287 | if (transport->sock != NULL) { |
03bf4b70 CL |
1288 | dprintk("RPC: xs_connect delayed xprt %p for %lu seconds\n", |
1289 | xprt, xprt->reestablish_timeout / HZ); | |
c8475461 | 1290 | schedule_delayed_work(&transport->connect_worker, |
03bf4b70 CL |
1291 | xprt->reestablish_timeout); |
1292 | xprt->reestablish_timeout <<= 1; | |
1293 | if (xprt->reestablish_timeout > XS_TCP_MAX_REEST_TO) | |
1294 | xprt->reestablish_timeout = XS_TCP_MAX_REEST_TO; | |
b0d93ad5 CL |
1295 | } else { |
1296 | dprintk("RPC: xs_connect scheduled xprt %p\n", xprt); | |
c8475461 | 1297 | schedule_work(&transport->connect_worker); |
b0d93ad5 CL |
1298 | |
1299 | /* flush_scheduled_work can sleep... */ | |
1300 | if (!RPC_IS_ASYNC(task)) | |
1301 | flush_scheduled_work(); | |
a246b010 CL |
1302 | } |
1303 | } | |
1304 | ||
262ca07d CL |
1305 | /** |
1306 | * xs_udp_print_stats - display UDP socket-specifc stats | |
1307 | * @xprt: rpc_xprt struct containing statistics | |
1308 | * @seq: output file | |
1309 | * | |
1310 | */ | |
1311 | static void xs_udp_print_stats(struct rpc_xprt *xprt, struct seq_file *seq) | |
1312 | { | |
c8475461 CL |
1313 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
1314 | ||
262ca07d | 1315 | seq_printf(seq, "\txprt:\tudp %u %lu %lu %lu %lu %Lu %Lu\n", |
c8475461 | 1316 | transport->port, |
262ca07d CL |
1317 | xprt->stat.bind_count, |
1318 | xprt->stat.sends, | |
1319 | xprt->stat.recvs, | |
1320 | xprt->stat.bad_xids, | |
1321 | xprt->stat.req_u, | |
1322 | xprt->stat.bklog_u); | |
1323 | } | |
1324 | ||
1325 | /** | |
1326 | * xs_tcp_print_stats - display TCP socket-specifc stats | |
1327 | * @xprt: rpc_xprt struct containing statistics | |
1328 | * @seq: output file | |
1329 | * | |
1330 | */ | |
1331 | static void xs_tcp_print_stats(struct rpc_xprt *xprt, struct seq_file *seq) | |
1332 | { | |
c8475461 | 1333 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
262ca07d CL |
1334 | long idle_time = 0; |
1335 | ||
1336 | if (xprt_connected(xprt)) | |
1337 | idle_time = (long)(jiffies - xprt->last_used) / HZ; | |
1338 | ||
1339 | seq_printf(seq, "\txprt:\ttcp %u %lu %lu %lu %ld %lu %lu %lu %Lu %Lu\n", | |
c8475461 | 1340 | transport->port, |
262ca07d CL |
1341 | xprt->stat.bind_count, |
1342 | xprt->stat.connect_count, | |
1343 | xprt->stat.connect_time, | |
1344 | idle_time, | |
1345 | xprt->stat.sends, | |
1346 | xprt->stat.recvs, | |
1347 | xprt->stat.bad_xids, | |
1348 | xprt->stat.req_u, | |
1349 | xprt->stat.bklog_u); | |
1350 | } | |
1351 | ||
262965f5 | 1352 | static struct rpc_xprt_ops xs_udp_ops = { |
43118c29 | 1353 | .set_buffer_size = xs_udp_set_buffer_size, |
12a80469 | 1354 | .reserve_xprt = xprt_reserve_xprt_cong, |
49e9a890 | 1355 | .release_xprt = xprt_release_xprt_cong, |
bbf7c1dd | 1356 | .rpcbind = rpc_getport, |
92200412 | 1357 | .set_port = xs_set_port, |
262965f5 | 1358 | .connect = xs_connect, |
02107148 CL |
1359 | .buf_alloc = rpc_malloc, |
1360 | .buf_free = rpc_free, | |
262965f5 | 1361 | .send_request = xs_udp_send_request, |
fe3aca29 | 1362 | .set_retrans_timeout = xprt_set_retrans_timeout_rtt, |
46c0ee8b | 1363 | .timer = xs_udp_timer, |
a58dd398 | 1364 | .release_request = xprt_release_rqst_cong, |
262965f5 CL |
1365 | .close = xs_close, |
1366 | .destroy = xs_destroy, | |
262ca07d | 1367 | .print_stats = xs_udp_print_stats, |
262965f5 CL |
1368 | }; |
1369 | ||
1370 | static struct rpc_xprt_ops xs_tcp_ops = { | |
12a80469 | 1371 | .reserve_xprt = xprt_reserve_xprt, |
e0ab53de | 1372 | .release_xprt = xs_tcp_release_xprt, |
bbf7c1dd | 1373 | .rpcbind = rpc_getport, |
92200412 | 1374 | .set_port = xs_set_port, |
9903cd1c | 1375 | .connect = xs_connect, |
02107148 CL |
1376 | .buf_alloc = rpc_malloc, |
1377 | .buf_free = rpc_free, | |
262965f5 | 1378 | .send_request = xs_tcp_send_request, |
fe3aca29 | 1379 | .set_retrans_timeout = xprt_set_retrans_timeout_def, |
9903cd1c CL |
1380 | .close = xs_close, |
1381 | .destroy = xs_destroy, | |
262ca07d | 1382 | .print_stats = xs_tcp_print_stats, |
a246b010 CL |
1383 | }; |
1384 | ||
c8541ecd CL |
1385 | static struct rpc_xprt *xs_setup_xprt(struct sockaddr *addr, size_t addrlen, unsigned int slot_table_size) |
1386 | { | |
1387 | struct rpc_xprt *xprt; | |
ffc2e518 | 1388 | struct sock_xprt *new; |
c8541ecd CL |
1389 | |
1390 | if (addrlen > sizeof(xprt->addr)) { | |
1391 | dprintk("RPC: xs_setup_xprt: address too large\n"); | |
1392 | return ERR_PTR(-EBADF); | |
1393 | } | |
1394 | ||
ffc2e518 CL |
1395 | new = kzalloc(sizeof(*new), GFP_KERNEL); |
1396 | if (new == NULL) { | |
c8541ecd CL |
1397 | dprintk("RPC: xs_setup_xprt: couldn't allocate rpc_xprt\n"); |
1398 | return ERR_PTR(-ENOMEM); | |
1399 | } | |
ffc2e518 | 1400 | xprt = &new->xprt; |
c8541ecd CL |
1401 | |
1402 | xprt->max_reqs = slot_table_size; | |
1403 | xprt->slot = kcalloc(xprt->max_reqs, sizeof(struct rpc_rqst), GFP_KERNEL); | |
1404 | if (xprt->slot == NULL) { | |
1405 | kfree(xprt); | |
1406 | dprintk("RPC: xs_setup_xprt: couldn't allocate slot table\n"); | |
1407 | return ERR_PTR(-ENOMEM); | |
1408 | } | |
1409 | ||
1410 | memcpy(&xprt->addr, addr, addrlen); | |
1411 | xprt->addrlen = addrlen; | |
c8475461 | 1412 | new->port = xs_get_random_port(); |
c8541ecd CL |
1413 | |
1414 | return xprt; | |
1415 | } | |
1416 | ||
9903cd1c CL |
1417 | /** |
1418 | * xs_setup_udp - Set up transport to use a UDP socket | |
c8541ecd CL |
1419 | * @addr: address of remote server |
1420 | * @addrlen: length of address in bytes | |
9903cd1c CL |
1421 | * @to: timeout parameters |
1422 | * | |
1423 | */ | |
c8541ecd | 1424 | struct rpc_xprt *xs_setup_udp(struct sockaddr *addr, size_t addrlen, struct rpc_timeout *to) |
a246b010 | 1425 | { |
c8541ecd | 1426 | struct rpc_xprt *xprt; |
c8475461 | 1427 | struct sock_xprt *transport; |
a246b010 | 1428 | |
c8541ecd CL |
1429 | xprt = xs_setup_xprt(addr, addrlen, xprt_udp_slot_table_entries); |
1430 | if (IS_ERR(xprt)) | |
1431 | return xprt; | |
c8475461 | 1432 | transport = container_of(xprt, struct sock_xprt, xprt); |
a246b010 | 1433 | |
c8541ecd | 1434 | if (ntohs(((struct sockaddr_in *)addr)->sin_port) != 0) |
ec739ef0 | 1435 | xprt_set_bound(xprt); |
ec739ef0 CL |
1436 | |
1437 | xprt->prot = IPPROTO_UDP; | |
808012fb | 1438 | xprt->tsh_size = 0; |
a246b010 CL |
1439 | /* XXX: header size can vary due to auth type, IPv6, etc. */ |
1440 | xprt->max_payload = (1U << 16) - (MAX_HEADER << 3); | |
1441 | ||
c8475461 | 1442 | INIT_WORK(&transport->connect_worker, xs_udp_connect_worker, transport); |
03bf4b70 CL |
1443 | xprt->bind_timeout = XS_BIND_TO; |
1444 | xprt->connect_timeout = XS_UDP_CONN_TO; | |
1445 | xprt->reestablish_timeout = XS_UDP_REEST_TO; | |
1446 | xprt->idle_timeout = XS_IDLE_DISC_TO; | |
a246b010 | 1447 | |
262965f5 | 1448 | xprt->ops = &xs_udp_ops; |
a246b010 CL |
1449 | |
1450 | if (to) | |
1451 | xprt->timeout = *to; | |
1452 | else | |
9903cd1c | 1453 | xprt_set_timeout(&xprt->timeout, 5, 5 * HZ); |
a246b010 | 1454 | |
edb267a6 CL |
1455 | xs_format_peer_addresses(xprt); |
1456 | dprintk("RPC: set up transport to address %s\n", | |
7559c7a2 | 1457 | xprt->address_strings[RPC_DISPLAY_ALL]); |
edb267a6 | 1458 | |
c8541ecd | 1459 | return xprt; |
a246b010 CL |
1460 | } |
1461 | ||
9903cd1c CL |
1462 | /** |
1463 | * xs_setup_tcp - Set up transport to use a TCP socket | |
c8541ecd CL |
1464 | * @addr: address of remote server |
1465 | * @addrlen: length of address in bytes | |
9903cd1c CL |
1466 | * @to: timeout parameters |
1467 | * | |
1468 | */ | |
c8541ecd | 1469 | struct rpc_xprt *xs_setup_tcp(struct sockaddr *addr, size_t addrlen, struct rpc_timeout *to) |
a246b010 | 1470 | { |
c8541ecd | 1471 | struct rpc_xprt *xprt; |
c8475461 | 1472 | struct sock_xprt *transport; |
a246b010 | 1473 | |
c8541ecd CL |
1474 | xprt = xs_setup_xprt(addr, addrlen, xprt_tcp_slot_table_entries); |
1475 | if (IS_ERR(xprt)) | |
1476 | return xprt; | |
c8475461 | 1477 | transport = container_of(xprt, struct sock_xprt, xprt); |
a246b010 | 1478 | |
c8541ecd | 1479 | if (ntohs(((struct sockaddr_in *)addr)->sin_port) != 0) |
ec739ef0 | 1480 | xprt_set_bound(xprt); |
ec739ef0 CL |
1481 | |
1482 | xprt->prot = IPPROTO_TCP; | |
808012fb | 1483 | xprt->tsh_size = sizeof(rpc_fraghdr) / sizeof(u32); |
808012fb | 1484 | xprt->max_payload = RPC_MAX_FRAGMENT_SIZE; |
a246b010 | 1485 | |
c8475461 | 1486 | INIT_WORK(&transport->connect_worker, xs_tcp_connect_worker, transport); |
03bf4b70 CL |
1487 | xprt->bind_timeout = XS_BIND_TO; |
1488 | xprt->connect_timeout = XS_TCP_CONN_TO; | |
1489 | xprt->reestablish_timeout = XS_TCP_INIT_REEST_TO; | |
1490 | xprt->idle_timeout = XS_IDLE_DISC_TO; | |
a246b010 | 1491 | |
262965f5 | 1492 | xprt->ops = &xs_tcp_ops; |
a246b010 CL |
1493 | |
1494 | if (to) | |
1495 | xprt->timeout = *to; | |
1496 | else | |
9903cd1c | 1497 | xprt_set_timeout(&xprt->timeout, 2, 60 * HZ); |
a246b010 | 1498 | |
edb267a6 CL |
1499 | xs_format_peer_addresses(xprt); |
1500 | dprintk("RPC: set up transport to address %s\n", | |
7559c7a2 | 1501 | xprt->address_strings[RPC_DISPLAY_ALL]); |
edb267a6 | 1502 | |
c8541ecd | 1503 | return xprt; |
a246b010 | 1504 | } |