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> | |
8f9d5b1a CL |
16 | * |
17 | * IPv6 support contributed by Gilles Quillard, Bull Open Source, 2005. | |
18 | * <gilles.quillard@bull.net> | |
a246b010 CL |
19 | */ |
20 | ||
21 | #include <linux/types.h> | |
22 | #include <linux/slab.h> | |
bc25571e | 23 | #include <linux/module.h> |
a246b010 | 24 | #include <linux/capability.h> |
a246b010 CL |
25 | #include <linux/pagemap.h> |
26 | #include <linux/errno.h> | |
27 | #include <linux/socket.h> | |
28 | #include <linux/in.h> | |
29 | #include <linux/net.h> | |
30 | #include <linux/mm.h> | |
31 | #include <linux/udp.h> | |
32 | #include <linux/tcp.h> | |
33 | #include <linux/sunrpc/clnt.h> | |
02107148 | 34 | #include <linux/sunrpc/sched.h> |
49c36fcc | 35 | #include <linux/sunrpc/xprtsock.h> |
a246b010 CL |
36 | #include <linux/file.h> |
37 | ||
38 | #include <net/sock.h> | |
39 | #include <net/checksum.h> | |
40 | #include <net/udp.h> | |
41 | #include <net/tcp.h> | |
42 | ||
c556b754 CL |
43 | /* |
44 | * xprtsock tunables | |
45 | */ | |
46 | unsigned int xprt_udp_slot_table_entries = RPC_DEF_SLOT_TABLE; | |
47 | unsigned int xprt_tcp_slot_table_entries = RPC_DEF_SLOT_TABLE; | |
48 | ||
49 | unsigned int xprt_min_resvport = RPC_DEF_MIN_RESVPORT; | |
50 | unsigned int xprt_max_resvport = RPC_DEF_MAX_RESVPORT; | |
51 | ||
fbf76683 CL |
52 | /* |
53 | * We can register our own files under /proc/sys/sunrpc by | |
54 | * calling register_sysctl_table() again. The files in that | |
55 | * directory become the union of all files registered there. | |
56 | * | |
57 | * We simply need to make sure that we don't collide with | |
58 | * someone else's file names! | |
59 | */ | |
60 | ||
61 | #ifdef RPC_DEBUG | |
62 | ||
63 | static unsigned int min_slot_table_size = RPC_MIN_SLOT_TABLE; | |
64 | static unsigned int max_slot_table_size = RPC_MAX_SLOT_TABLE; | |
65 | static unsigned int xprt_min_resvport_limit = RPC_MIN_RESVPORT; | |
66 | static unsigned int xprt_max_resvport_limit = RPC_MAX_RESVPORT; | |
67 | ||
68 | static struct ctl_table_header *sunrpc_table_header; | |
69 | ||
70 | /* | |
71 | * FIXME: changing the UDP slot table size should also resize the UDP | |
72 | * socket buffers for existing UDP transports | |
73 | */ | |
74 | static ctl_table xs_tunables_table[] = { | |
75 | { | |
76 | .ctl_name = CTL_SLOTTABLE_UDP, | |
77 | .procname = "udp_slot_table_entries", | |
78 | .data = &xprt_udp_slot_table_entries, | |
79 | .maxlen = sizeof(unsigned int), | |
80 | .mode = 0644, | |
81 | .proc_handler = &proc_dointvec_minmax, | |
82 | .strategy = &sysctl_intvec, | |
83 | .extra1 = &min_slot_table_size, | |
84 | .extra2 = &max_slot_table_size | |
85 | }, | |
86 | { | |
87 | .ctl_name = CTL_SLOTTABLE_TCP, | |
88 | .procname = "tcp_slot_table_entries", | |
89 | .data = &xprt_tcp_slot_table_entries, | |
90 | .maxlen = sizeof(unsigned int), | |
91 | .mode = 0644, | |
92 | .proc_handler = &proc_dointvec_minmax, | |
93 | .strategy = &sysctl_intvec, | |
94 | .extra1 = &min_slot_table_size, | |
95 | .extra2 = &max_slot_table_size | |
96 | }, | |
97 | { | |
98 | .ctl_name = CTL_MIN_RESVPORT, | |
99 | .procname = "min_resvport", | |
100 | .data = &xprt_min_resvport, | |
101 | .maxlen = sizeof(unsigned int), | |
102 | .mode = 0644, | |
103 | .proc_handler = &proc_dointvec_minmax, | |
104 | .strategy = &sysctl_intvec, | |
105 | .extra1 = &xprt_min_resvport_limit, | |
106 | .extra2 = &xprt_max_resvport_limit | |
107 | }, | |
108 | { | |
109 | .ctl_name = CTL_MAX_RESVPORT, | |
110 | .procname = "max_resvport", | |
111 | .data = &xprt_max_resvport, | |
112 | .maxlen = sizeof(unsigned int), | |
113 | .mode = 0644, | |
114 | .proc_handler = &proc_dointvec_minmax, | |
115 | .strategy = &sysctl_intvec, | |
116 | .extra1 = &xprt_min_resvport_limit, | |
117 | .extra2 = &xprt_max_resvport_limit | |
118 | }, | |
119 | { | |
120 | .ctl_name = 0, | |
121 | }, | |
122 | }; | |
123 | ||
124 | static ctl_table sunrpc_table[] = { | |
125 | { | |
126 | .ctl_name = CTL_SUNRPC, | |
127 | .procname = "sunrpc", | |
128 | .mode = 0555, | |
129 | .child = xs_tunables_table | |
130 | }, | |
131 | { | |
132 | .ctl_name = 0, | |
133 | }, | |
134 | }; | |
135 | ||
136 | #endif | |
137 | ||
262965f5 CL |
138 | /* |
139 | * How many times to try sending a request on a socket before waiting | |
140 | * for the socket buffer to clear. | |
141 | */ | |
142 | #define XS_SENDMSG_RETRY (10U) | |
143 | ||
03bf4b70 CL |
144 | /* |
145 | * Time out for an RPC UDP socket connect. UDP socket connects are | |
146 | * synchronous, but we set a timeout anyway in case of resource | |
147 | * exhaustion on the local host. | |
148 | */ | |
149 | #define XS_UDP_CONN_TO (5U * HZ) | |
150 | ||
151 | /* | |
152 | * Wait duration for an RPC TCP connection to be established. Solaris | |
153 | * NFS over TCP uses 60 seconds, for example, which is in line with how | |
154 | * long a server takes to reboot. | |
155 | */ | |
156 | #define XS_TCP_CONN_TO (60U * HZ) | |
157 | ||
158 | /* | |
159 | * Wait duration for a reply from the RPC portmapper. | |
160 | */ | |
161 | #define XS_BIND_TO (60U * HZ) | |
162 | ||
163 | /* | |
164 | * Delay if a UDP socket connect error occurs. This is most likely some | |
165 | * kind of resource problem on the local host. | |
166 | */ | |
167 | #define XS_UDP_REEST_TO (2U * HZ) | |
168 | ||
169 | /* | |
170 | * The reestablish timeout allows clients to delay for a bit before attempting | |
171 | * to reconnect to a server that just dropped our connection. | |
172 | * | |
173 | * We implement an exponential backoff when trying to reestablish a TCP | |
174 | * transport connection with the server. Some servers like to drop a TCP | |
175 | * connection when they are overworked, so we start with a short timeout and | |
176 | * increase over time if the server is down or not responding. | |
177 | */ | |
178 | #define XS_TCP_INIT_REEST_TO (3U * HZ) | |
179 | #define XS_TCP_MAX_REEST_TO (5U * 60 * HZ) | |
180 | ||
181 | /* | |
182 | * TCP idle timeout; client drops the transport socket if it is idle | |
183 | * for this long. Note that we also timeout UDP sockets to prevent | |
184 | * holding port numbers when there is no RPC traffic. | |
185 | */ | |
186 | #define XS_IDLE_DISC_TO (5U * 60 * HZ) | |
187 | ||
a246b010 CL |
188 | #ifdef RPC_DEBUG |
189 | # undef RPC_DEBUG_DATA | |
9903cd1c | 190 | # define RPCDBG_FACILITY RPCDBG_TRANS |
a246b010 CL |
191 | #endif |
192 | ||
a246b010 | 193 | #ifdef RPC_DEBUG_DATA |
9903cd1c | 194 | static void xs_pktdump(char *msg, u32 *packet, unsigned int count) |
a246b010 | 195 | { |
9903cd1c CL |
196 | u8 *buf = (u8 *) packet; |
197 | int j; | |
a246b010 | 198 | |
46121cf7 | 199 | dprintk("RPC: %s\n", msg); |
a246b010 CL |
200 | for (j = 0; j < count && j < 128; j += 4) { |
201 | if (!(j & 31)) { | |
202 | if (j) | |
203 | dprintk("\n"); | |
204 | dprintk("0x%04x ", j); | |
205 | } | |
206 | dprintk("%02x%02x%02x%02x ", | |
207 | buf[j], buf[j+1], buf[j+2], buf[j+3]); | |
208 | } | |
209 | dprintk("\n"); | |
210 | } | |
211 | #else | |
9903cd1c | 212 | static inline void xs_pktdump(char *msg, u32 *packet, unsigned int count) |
a246b010 CL |
213 | { |
214 | /* NOP */ | |
215 | } | |
216 | #endif | |
217 | ||
ffc2e518 CL |
218 | struct sock_xprt { |
219 | struct rpc_xprt xprt; | |
ee0ac0c2 CL |
220 | |
221 | /* | |
222 | * Network layer | |
223 | */ | |
224 | struct socket * sock; | |
225 | struct sock * inet; | |
51971139 CL |
226 | |
227 | /* | |
228 | * State of TCP reply receive | |
229 | */ | |
230 | __be32 tcp_fraghdr, | |
231 | tcp_xid; | |
232 | ||
233 | u32 tcp_offset, | |
234 | tcp_reclen; | |
235 | ||
236 | unsigned long tcp_copied, | |
237 | tcp_flags; | |
c8475461 CL |
238 | |
239 | /* | |
240 | * Connection of transports | |
241 | */ | |
34161db6 | 242 | struct delayed_work connect_worker; |
d3bc9a1d | 243 | struct sockaddr_storage addr; |
c8475461 | 244 | unsigned short port; |
7c6e066e CL |
245 | |
246 | /* | |
247 | * UDP socket buffer size parameters | |
248 | */ | |
249 | size_t rcvsize, | |
250 | sndsize; | |
314dfd79 CL |
251 | |
252 | /* | |
253 | * Saved socket callback addresses | |
254 | */ | |
255 | void (*old_data_ready)(struct sock *, int); | |
256 | void (*old_state_change)(struct sock *); | |
257 | void (*old_write_space)(struct sock *); | |
ffc2e518 CL |
258 | }; |
259 | ||
e136d092 CL |
260 | /* |
261 | * TCP receive state flags | |
262 | */ | |
263 | #define TCP_RCV_LAST_FRAG (1UL << 0) | |
264 | #define TCP_RCV_COPY_FRAGHDR (1UL << 1) | |
265 | #define TCP_RCV_COPY_XID (1UL << 2) | |
266 | #define TCP_RCV_COPY_DATA (1UL << 3) | |
267 | ||
95392c59 CL |
268 | static inline struct sockaddr *xs_addr(struct rpc_xprt *xprt) |
269 | { | |
270 | return (struct sockaddr *) &xprt->addr; | |
271 | } | |
272 | ||
273 | static inline struct sockaddr_in *xs_addr_in(struct rpc_xprt *xprt) | |
edb267a6 | 274 | { |
95392c59 CL |
275 | return (struct sockaddr_in *) &xprt->addr; |
276 | } | |
277 | ||
278 | static inline struct sockaddr_in6 *xs_addr_in6(struct rpc_xprt *xprt) | |
279 | { | |
280 | return (struct sockaddr_in6 *) &xprt->addr; | |
281 | } | |
282 | ||
b454ae90 CL |
283 | static void xs_format_ipv4_peer_addresses(struct rpc_xprt *xprt, |
284 | const char *protocol, | |
285 | const char *netid) | |
edb267a6 | 286 | { |
95392c59 | 287 | struct sockaddr_in *addr = xs_addr_in(xprt); |
edb267a6 CL |
288 | char *buf; |
289 | ||
290 | buf = kzalloc(20, GFP_KERNEL); | |
291 | if (buf) { | |
bda243df | 292 | snprintf(buf, 20, NIPQUAD_FMT, |
edb267a6 CL |
293 | NIPQUAD(addr->sin_addr.s_addr)); |
294 | } | |
295 | xprt->address_strings[RPC_DISPLAY_ADDR] = buf; | |
296 | ||
297 | buf = kzalloc(8, GFP_KERNEL); | |
298 | if (buf) { | |
299 | snprintf(buf, 8, "%u", | |
300 | ntohs(addr->sin_port)); | |
301 | } | |
302 | xprt->address_strings[RPC_DISPLAY_PORT] = buf; | |
303 | ||
b454ae90 | 304 | xprt->address_strings[RPC_DISPLAY_PROTO] = protocol; |
edb267a6 CL |
305 | |
306 | buf = kzalloc(48, GFP_KERNEL); | |
307 | if (buf) { | |
bda243df | 308 | snprintf(buf, 48, "addr="NIPQUAD_FMT" port=%u proto=%s", |
edb267a6 CL |
309 | NIPQUAD(addr->sin_addr.s_addr), |
310 | ntohs(addr->sin_port), | |
b454ae90 | 311 | protocol); |
edb267a6 CL |
312 | } |
313 | xprt->address_strings[RPC_DISPLAY_ALL] = buf; | |
fbfe3cc6 CL |
314 | |
315 | buf = kzalloc(10, GFP_KERNEL); | |
316 | if (buf) { | |
317 | snprintf(buf, 10, "%02x%02x%02x%02x", | |
318 | NIPQUAD(addr->sin_addr.s_addr)); | |
319 | } | |
320 | xprt->address_strings[RPC_DISPLAY_HEX_ADDR] = buf; | |
321 | ||
322 | buf = kzalloc(8, GFP_KERNEL); | |
323 | if (buf) { | |
324 | snprintf(buf, 8, "%4hx", | |
325 | ntohs(addr->sin_port)); | |
326 | } | |
327 | xprt->address_strings[RPC_DISPLAY_HEX_PORT] = buf; | |
756805e7 CL |
328 | |
329 | buf = kzalloc(30, GFP_KERNEL); | |
330 | if (buf) { | |
331 | snprintf(buf, 30, NIPQUAD_FMT".%u.%u", | |
332 | NIPQUAD(addr->sin_addr.s_addr), | |
333 | ntohs(addr->sin_port) >> 8, | |
334 | ntohs(addr->sin_port) & 0xff); | |
335 | } | |
336 | xprt->address_strings[RPC_DISPLAY_UNIVERSAL_ADDR] = buf; | |
4417c8c4 | 337 | |
b454ae90 | 338 | xprt->address_strings[RPC_DISPLAY_NETID] = netid; |
edb267a6 CL |
339 | } |
340 | ||
b454ae90 CL |
341 | static void xs_format_ipv6_peer_addresses(struct rpc_xprt *xprt, |
342 | const char *protocol, | |
343 | const char *netid) | |
4b6473fb | 344 | { |
95392c59 | 345 | struct sockaddr_in6 *addr = xs_addr_in6(xprt); |
4b6473fb CL |
346 | char *buf; |
347 | ||
348 | buf = kzalloc(40, GFP_KERNEL); | |
349 | if (buf) { | |
350 | snprintf(buf, 40, NIP6_FMT, | |
351 | NIP6(addr->sin6_addr)); | |
352 | } | |
353 | xprt->address_strings[RPC_DISPLAY_ADDR] = buf; | |
354 | ||
355 | buf = kzalloc(8, GFP_KERNEL); | |
356 | if (buf) { | |
357 | snprintf(buf, 8, "%u", | |
358 | ntohs(addr->sin6_port)); | |
359 | } | |
360 | xprt->address_strings[RPC_DISPLAY_PORT] = buf; | |
361 | ||
b454ae90 | 362 | xprt->address_strings[RPC_DISPLAY_PROTO] = protocol; |
4b6473fb CL |
363 | |
364 | buf = kzalloc(64, GFP_KERNEL); | |
365 | if (buf) { | |
366 | snprintf(buf, 64, "addr="NIP6_FMT" port=%u proto=%s", | |
367 | NIP6(addr->sin6_addr), | |
368 | ntohs(addr->sin6_port), | |
b454ae90 | 369 | protocol); |
4b6473fb CL |
370 | } |
371 | xprt->address_strings[RPC_DISPLAY_ALL] = buf; | |
372 | ||
373 | buf = kzalloc(36, GFP_KERNEL); | |
374 | if (buf) { | |
375 | snprintf(buf, 36, NIP6_SEQFMT, | |
376 | NIP6(addr->sin6_addr)); | |
377 | } | |
378 | xprt->address_strings[RPC_DISPLAY_HEX_ADDR] = buf; | |
379 | ||
380 | buf = kzalloc(8, GFP_KERNEL); | |
381 | if (buf) { | |
382 | snprintf(buf, 8, "%4hx", | |
383 | ntohs(addr->sin6_port)); | |
384 | } | |
385 | xprt->address_strings[RPC_DISPLAY_HEX_PORT] = buf; | |
756805e7 CL |
386 | |
387 | buf = kzalloc(50, GFP_KERNEL); | |
388 | if (buf) { | |
389 | snprintf(buf, 50, NIP6_FMT".%u.%u", | |
390 | NIP6(addr->sin6_addr), | |
391 | ntohs(addr->sin6_port) >> 8, | |
392 | ntohs(addr->sin6_port) & 0xff); | |
393 | } | |
394 | xprt->address_strings[RPC_DISPLAY_UNIVERSAL_ADDR] = buf; | |
4417c8c4 | 395 | |
b454ae90 | 396 | xprt->address_strings[RPC_DISPLAY_NETID] = netid; |
edb267a6 CL |
397 | } |
398 | ||
399 | static void xs_free_peer_addresses(struct rpc_xprt *xprt) | |
400 | { | |
33e01dc7 CL |
401 | unsigned int i; |
402 | ||
403 | for (i = 0; i < RPC_DISPLAY_MAX; i++) | |
404 | switch (i) { | |
405 | case RPC_DISPLAY_PROTO: | |
406 | case RPC_DISPLAY_NETID: | |
407 | continue; | |
408 | default: | |
409 | kfree(xprt->address_strings[i]); | |
410 | } | |
edb267a6 CL |
411 | } |
412 | ||
b4b5cc85 CL |
413 | #define XS_SENDMSG_FLAGS (MSG_DONTWAIT | MSG_NOSIGNAL) |
414 | ||
24c5684b | 415 | static int xs_send_kvec(struct socket *sock, struct sockaddr *addr, int addrlen, struct kvec *vec, unsigned int base, int more) |
b4b5cc85 | 416 | { |
b4b5cc85 CL |
417 | struct msghdr msg = { |
418 | .msg_name = addr, | |
419 | .msg_namelen = addrlen, | |
24c5684b TM |
420 | .msg_flags = XS_SENDMSG_FLAGS | (more ? MSG_MORE : 0), |
421 | }; | |
422 | struct kvec iov = { | |
423 | .iov_base = vec->iov_base + base, | |
424 | .iov_len = vec->iov_len - base, | |
b4b5cc85 CL |
425 | }; |
426 | ||
24c5684b | 427 | if (iov.iov_len != 0) |
b4b5cc85 CL |
428 | return kernel_sendmsg(sock, &msg, &iov, 1, iov.iov_len); |
429 | return kernel_sendmsg(sock, &msg, NULL, 0, 0); | |
430 | } | |
431 | ||
24c5684b | 432 | static int xs_send_pagedata(struct socket *sock, struct xdr_buf *xdr, unsigned int base, int more) |
b4b5cc85 | 433 | { |
24c5684b TM |
434 | struct page **ppage; |
435 | unsigned int remainder; | |
436 | int err, sent = 0; | |
437 | ||
438 | remainder = xdr->page_len - base; | |
439 | base += xdr->page_base; | |
440 | ppage = xdr->pages + (base >> PAGE_SHIFT); | |
441 | base &= ~PAGE_MASK; | |
442 | for(;;) { | |
443 | unsigned int len = min_t(unsigned int, PAGE_SIZE - base, remainder); | |
444 | int flags = XS_SENDMSG_FLAGS; | |
b4b5cc85 | 445 | |
24c5684b TM |
446 | remainder -= len; |
447 | if (remainder != 0 || more) | |
448 | flags |= MSG_MORE; | |
449 | err = sock->ops->sendpage(sock, *ppage, base, len, flags); | |
450 | if (remainder == 0 || err != len) | |
451 | break; | |
452 | sent += err; | |
453 | ppage++; | |
454 | base = 0; | |
455 | } | |
456 | if (sent == 0) | |
457 | return err; | |
458 | if (err > 0) | |
459 | sent += err; | |
460 | return sent; | |
b4b5cc85 CL |
461 | } |
462 | ||
9903cd1c CL |
463 | /** |
464 | * xs_sendpages - write pages directly to a socket | |
465 | * @sock: socket to send on | |
466 | * @addr: UDP only -- address of destination | |
467 | * @addrlen: UDP only -- length of destination address | |
468 | * @xdr: buffer containing this request | |
469 | * @base: starting position in the buffer | |
470 | * | |
a246b010 | 471 | */ |
24c5684b | 472 | static int xs_sendpages(struct socket *sock, struct sockaddr *addr, int addrlen, struct xdr_buf *xdr, unsigned int base) |
a246b010 | 473 | { |
24c5684b TM |
474 | unsigned int remainder = xdr->len - base; |
475 | int err, sent = 0; | |
a246b010 | 476 | |
262965f5 CL |
477 | if (unlikely(!sock)) |
478 | return -ENOTCONN; | |
479 | ||
480 | clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags); | |
24c5684b TM |
481 | if (base != 0) { |
482 | addr = NULL; | |
483 | addrlen = 0; | |
484 | } | |
262965f5 | 485 | |
24c5684b TM |
486 | if (base < xdr->head[0].iov_len || addr != NULL) { |
487 | unsigned int len = xdr->head[0].iov_len - base; | |
488 | remainder -= len; | |
489 | err = xs_send_kvec(sock, addr, addrlen, &xdr->head[0], base, remainder != 0); | |
490 | if (remainder == 0 || err != len) | |
a246b010 | 491 | goto out; |
24c5684b | 492 | sent += err; |
a246b010 CL |
493 | base = 0; |
494 | } else | |
24c5684b | 495 | base -= xdr->head[0].iov_len; |
a246b010 | 496 | |
24c5684b TM |
497 | if (base < xdr->page_len) { |
498 | unsigned int len = xdr->page_len - base; | |
499 | remainder -= len; | |
500 | err = xs_send_pagedata(sock, xdr, base, remainder != 0); | |
501 | if (remainder == 0 || err != len) | |
a246b010 | 502 | goto out; |
24c5684b | 503 | sent += err; |
a246b010 | 504 | base = 0; |
24c5684b TM |
505 | } else |
506 | base -= xdr->page_len; | |
507 | ||
508 | if (base >= xdr->tail[0].iov_len) | |
509 | return sent; | |
510 | err = xs_send_kvec(sock, NULL, 0, &xdr->tail[0], base, 0); | |
a246b010 | 511 | out: |
24c5684b TM |
512 | if (sent == 0) |
513 | return err; | |
514 | if (err > 0) | |
515 | sent += err; | |
516 | return sent; | |
a246b010 CL |
517 | } |
518 | ||
b6ddf64f TM |
519 | static void xs_nospace_callback(struct rpc_task *task) |
520 | { | |
521 | struct sock_xprt *transport = container_of(task->tk_rqstp->rq_xprt, struct sock_xprt, xprt); | |
522 | ||
523 | transport->inet->sk_write_pending--; | |
524 | clear_bit(SOCK_ASYNC_NOSPACE, &transport->sock->flags); | |
525 | } | |
526 | ||
9903cd1c | 527 | /** |
262965f5 CL |
528 | * xs_nospace - place task on wait queue if transmit was incomplete |
529 | * @task: task to put to sleep | |
9903cd1c | 530 | * |
a246b010 | 531 | */ |
262965f5 | 532 | static void xs_nospace(struct rpc_task *task) |
a246b010 | 533 | { |
262965f5 CL |
534 | struct rpc_rqst *req = task->tk_rqstp; |
535 | struct rpc_xprt *xprt = req->rq_xprt; | |
ee0ac0c2 | 536 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
a246b010 | 537 | |
46121cf7 | 538 | dprintk("RPC: %5u xmit incomplete (%u left of %u)\n", |
262965f5 CL |
539 | task->tk_pid, req->rq_slen - req->rq_bytes_sent, |
540 | req->rq_slen); | |
541 | ||
b6ddf64f TM |
542 | /* Protect against races with write_space */ |
543 | spin_lock_bh(&xprt->transport_lock); | |
544 | ||
545 | /* Don't race with disconnect */ | |
546 | if (xprt_connected(xprt)) { | |
547 | if (test_bit(SOCK_ASYNC_NOSPACE, &transport->sock->flags)) { | |
548 | /* | |
549 | * Notify TCP that we're limited by the application | |
550 | * window size | |
551 | */ | |
552 | set_bit(SOCK_NOSPACE, &transport->sock->flags); | |
553 | transport->inet->sk_write_pending++; | |
554 | /* ...and wait for more buffer space */ | |
555 | xprt_wait_for_buffer_space(task, xs_nospace_callback); | |
556 | } | |
557 | } else { | |
558 | clear_bit(SOCK_ASYNC_NOSPACE, &transport->sock->flags); | |
559 | task->tk_status = -ENOTCONN; | |
560 | } | |
262965f5 | 561 | |
b6ddf64f | 562 | spin_unlock_bh(&xprt->transport_lock); |
262965f5 CL |
563 | } |
564 | ||
565 | /** | |
566 | * xs_udp_send_request - write an RPC request to a UDP socket | |
567 | * @task: address of RPC task that manages the state of an RPC request | |
568 | * | |
569 | * Return values: | |
570 | * 0: The request has been sent | |
571 | * EAGAIN: The socket was blocked, please call again later to | |
572 | * complete the request | |
573 | * ENOTCONN: Caller needs to invoke connect logic then call again | |
574 | * other: Some other error occured, the request was not sent | |
575 | */ | |
576 | static int xs_udp_send_request(struct rpc_task *task) | |
577 | { | |
578 | struct rpc_rqst *req = task->tk_rqstp; | |
579 | struct rpc_xprt *xprt = req->rq_xprt; | |
ee0ac0c2 | 580 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
262965f5 CL |
581 | struct xdr_buf *xdr = &req->rq_snd_buf; |
582 | int status; | |
a246b010 | 583 | |
9903cd1c | 584 | xs_pktdump("packet data:", |
a246b010 CL |
585 | req->rq_svec->iov_base, |
586 | req->rq_svec->iov_len); | |
587 | ||
262965f5 | 588 | req->rq_xtime = jiffies; |
ee0ac0c2 | 589 | status = xs_sendpages(transport->sock, |
95392c59 | 590 | xs_addr(xprt), |
ee0ac0c2 CL |
591 | xprt->addrlen, xdr, |
592 | req->rq_bytes_sent); | |
a246b010 | 593 | |
46121cf7 | 594 | dprintk("RPC: xs_udp_send_request(%u) = %d\n", |
262965f5 | 595 | xdr->len - req->rq_bytes_sent, status); |
a246b010 | 596 | |
2199700f TM |
597 | if (status >= 0) { |
598 | task->tk_bytes_sent += status; | |
599 | if (status >= req->rq_slen) | |
600 | return 0; | |
601 | /* Still some bytes left; set up for a retry later. */ | |
262965f5 | 602 | status = -EAGAIN; |
2199700f | 603 | } |
a246b010 | 604 | |
262965f5 | 605 | switch (status) { |
b6ddf64f TM |
606 | case -EAGAIN: |
607 | xs_nospace(task); | |
608 | break; | |
262965f5 CL |
609 | case -ENETUNREACH: |
610 | case -EPIPE: | |
a246b010 CL |
611 | case -ECONNREFUSED: |
612 | /* When the server has died, an ICMP port unreachable message | |
9903cd1c | 613 | * prompts ECONNREFUSED. */ |
b6ddf64f | 614 | clear_bit(SOCK_ASYNC_NOSPACE, &transport->sock->flags); |
a246b010 CL |
615 | break; |
616 | default: | |
b6ddf64f | 617 | clear_bit(SOCK_ASYNC_NOSPACE, &transport->sock->flags); |
46121cf7 | 618 | dprintk("RPC: sendmsg returned unrecognized error %d\n", |
262965f5 | 619 | -status); |
a246b010 | 620 | } |
262965f5 CL |
621 | |
622 | return status; | |
a246b010 CL |
623 | } |
624 | ||
e06799f9 TM |
625 | /** |
626 | * xs_tcp_shutdown - gracefully shut down a TCP socket | |
627 | * @xprt: transport | |
628 | * | |
629 | * Initiates a graceful shutdown of the TCP socket by calling the | |
630 | * equivalent of shutdown(SHUT_WR); | |
631 | */ | |
632 | static void xs_tcp_shutdown(struct rpc_xprt *xprt) | |
633 | { | |
634 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); | |
635 | struct socket *sock = transport->sock; | |
636 | ||
637 | if (sock != NULL) | |
638 | kernel_sock_shutdown(sock, SHUT_WR); | |
639 | } | |
640 | ||
808012fb CL |
641 | static inline void xs_encode_tcp_record_marker(struct xdr_buf *buf) |
642 | { | |
643 | u32 reclen = buf->len - sizeof(rpc_fraghdr); | |
644 | rpc_fraghdr *base = buf->head[0].iov_base; | |
645 | *base = htonl(RPC_LAST_STREAM_FRAGMENT | reclen); | |
646 | } | |
647 | ||
9903cd1c | 648 | /** |
262965f5 | 649 | * xs_tcp_send_request - write an RPC request to a TCP socket |
9903cd1c CL |
650 | * @task: address of RPC task that manages the state of an RPC request |
651 | * | |
652 | * Return values: | |
262965f5 CL |
653 | * 0: The request has been sent |
654 | * EAGAIN: The socket was blocked, please call again later to | |
655 | * complete the request | |
656 | * ENOTCONN: Caller needs to invoke connect logic then call again | |
657 | * other: Some other error occured, the request was not sent | |
9903cd1c CL |
658 | * |
659 | * XXX: In the case of soft timeouts, should we eventually give up | |
262965f5 | 660 | * if sendmsg is not able to make progress? |
9903cd1c | 661 | */ |
262965f5 | 662 | static int xs_tcp_send_request(struct rpc_task *task) |
a246b010 CL |
663 | { |
664 | struct rpc_rqst *req = task->tk_rqstp; | |
665 | struct rpc_xprt *xprt = req->rq_xprt; | |
ee0ac0c2 | 666 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
262965f5 | 667 | struct xdr_buf *xdr = &req->rq_snd_buf; |
b595bb15 CL |
668 | int status; |
669 | unsigned int retry = 0; | |
a246b010 | 670 | |
808012fb | 671 | xs_encode_tcp_record_marker(&req->rq_snd_buf); |
a246b010 | 672 | |
262965f5 CL |
673 | xs_pktdump("packet data:", |
674 | req->rq_svec->iov_base, | |
675 | req->rq_svec->iov_len); | |
a246b010 CL |
676 | |
677 | /* Continue transmitting the packet/record. We must be careful | |
678 | * to cope with writespace callbacks arriving _after_ we have | |
262965f5 | 679 | * called sendmsg(). */ |
a246b010 CL |
680 | while (1) { |
681 | req->rq_xtime = jiffies; | |
ee0ac0c2 CL |
682 | status = xs_sendpages(transport->sock, |
683 | NULL, 0, xdr, req->rq_bytes_sent); | |
a246b010 | 684 | |
46121cf7 | 685 | dprintk("RPC: xs_tcp_send_request(%u) = %d\n", |
262965f5 | 686 | xdr->len - req->rq_bytes_sent, status); |
a246b010 | 687 | |
262965f5 | 688 | if (unlikely(status < 0)) |
a246b010 | 689 | break; |
a246b010 | 690 | |
262965f5 CL |
691 | /* If we've sent the entire packet, immediately |
692 | * reset the count of bytes sent. */ | |
693 | req->rq_bytes_sent += status; | |
ef759a2e | 694 | task->tk_bytes_sent += status; |
262965f5 CL |
695 | if (likely(req->rq_bytes_sent >= req->rq_slen)) { |
696 | req->rq_bytes_sent = 0; | |
697 | return 0; | |
698 | } | |
a246b010 CL |
699 | |
700 | status = -EAGAIN; | |
262965f5 | 701 | if (retry++ > XS_SENDMSG_RETRY) |
a246b010 CL |
702 | break; |
703 | } | |
704 | ||
262965f5 CL |
705 | switch (status) { |
706 | case -EAGAIN: | |
707 | xs_nospace(task); | |
708 | break; | |
709 | case -ECONNREFUSED: | |
710 | case -ECONNRESET: | |
711 | case -ENOTCONN: | |
712 | case -EPIPE: | |
713 | status = -ENOTCONN; | |
b6ddf64f | 714 | clear_bit(SOCK_ASYNC_NOSPACE, &transport->sock->flags); |
262965f5 CL |
715 | break; |
716 | default: | |
46121cf7 | 717 | dprintk("RPC: sendmsg returned unrecognized error %d\n", |
262965f5 | 718 | -status); |
b6ddf64f | 719 | clear_bit(SOCK_ASYNC_NOSPACE, &transport->sock->flags); |
e06799f9 | 720 | xs_tcp_shutdown(xprt); |
a246b010 | 721 | } |
262965f5 | 722 | |
a246b010 CL |
723 | return status; |
724 | } | |
725 | ||
e0ab53de TM |
726 | /** |
727 | * xs_tcp_release_xprt - clean up after a tcp transmission | |
728 | * @xprt: transport | |
729 | * @task: rpc task | |
730 | * | |
731 | * This cleans up if an error causes us to abort the transmission of a request. | |
732 | * In this case, the socket may need to be reset in order to avoid confusing | |
733 | * the server. | |
734 | */ | |
735 | static void xs_tcp_release_xprt(struct rpc_xprt *xprt, struct rpc_task *task) | |
736 | { | |
737 | struct rpc_rqst *req; | |
738 | ||
739 | if (task != xprt->snd_task) | |
740 | return; | |
741 | if (task == NULL) | |
742 | goto out_release; | |
743 | req = task->tk_rqstp; | |
744 | if (req->rq_bytes_sent == 0) | |
745 | goto out_release; | |
746 | if (req->rq_bytes_sent == req->rq_snd_buf.len) | |
747 | goto out_release; | |
748 | set_bit(XPRT_CLOSE_WAIT, &task->tk_xprt->state); | |
749 | out_release: | |
750 | xprt_release_xprt(xprt, task); | |
751 | } | |
752 | ||
9903cd1c CL |
753 | /** |
754 | * xs_close - close a socket | |
755 | * @xprt: transport | |
756 | * | |
3167e12c CL |
757 | * This is used when all requests are complete; ie, no DRC state remains |
758 | * on the server we want to save. | |
a246b010 | 759 | */ |
9903cd1c | 760 | static void xs_close(struct rpc_xprt *xprt) |
a246b010 | 761 | { |
ee0ac0c2 CL |
762 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
763 | struct socket *sock = transport->sock; | |
764 | struct sock *sk = transport->inet; | |
a246b010 CL |
765 | |
766 | if (!sk) | |
632e3bdc | 767 | goto clear_close_wait; |
a246b010 | 768 | |
46121cf7 | 769 | dprintk("RPC: xs_close xprt %p\n", xprt); |
9903cd1c | 770 | |
a246b010 | 771 | write_lock_bh(&sk->sk_callback_lock); |
ee0ac0c2 CL |
772 | transport->inet = NULL; |
773 | transport->sock = NULL; | |
a246b010 | 774 | |
9903cd1c | 775 | sk->sk_user_data = NULL; |
314dfd79 CL |
776 | sk->sk_data_ready = transport->old_data_ready; |
777 | sk->sk_state_change = transport->old_state_change; | |
778 | sk->sk_write_space = transport->old_write_space; | |
a246b010 CL |
779 | write_unlock_bh(&sk->sk_callback_lock); |
780 | ||
9903cd1c | 781 | sk->sk_no_check = 0; |
a246b010 CL |
782 | |
783 | sock_release(sock); | |
632e3bdc TM |
784 | clear_close_wait: |
785 | smp_mb__before_clear_bit(); | |
786 | clear_bit(XPRT_CLOSE_WAIT, &xprt->state); | |
3b948ae5 | 787 | clear_bit(XPRT_CLOSING, &xprt->state); |
632e3bdc | 788 | smp_mb__after_clear_bit(); |
62da3b24 | 789 | xprt_disconnect_done(xprt); |
a246b010 CL |
790 | } |
791 | ||
9903cd1c CL |
792 | /** |
793 | * xs_destroy - prepare to shutdown a transport | |
794 | * @xprt: doomed transport | |
795 | * | |
796 | */ | |
797 | static void xs_destroy(struct rpc_xprt *xprt) | |
a246b010 | 798 | { |
c8475461 CL |
799 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
800 | ||
46121cf7 | 801 | dprintk("RPC: xs_destroy xprt %p\n", xprt); |
9903cd1c | 802 | |
c1384c9c | 803 | cancel_rearming_delayed_work(&transport->connect_worker); |
a246b010 | 804 | |
9903cd1c | 805 | xs_close(xprt); |
edb267a6 | 806 | xs_free_peer_addresses(xprt); |
a246b010 | 807 | kfree(xprt->slot); |
c8541ecd | 808 | kfree(xprt); |
bc25571e | 809 | module_put(THIS_MODULE); |
a246b010 CL |
810 | } |
811 | ||
9903cd1c CL |
812 | static inline struct rpc_xprt *xprt_from_sock(struct sock *sk) |
813 | { | |
814 | return (struct rpc_xprt *) sk->sk_user_data; | |
815 | } | |
816 | ||
817 | /** | |
818 | * xs_udp_data_ready - "data ready" callback for UDP sockets | |
819 | * @sk: socket with data to read | |
820 | * @len: how much data to read | |
821 | * | |
a246b010 | 822 | */ |
9903cd1c | 823 | static void xs_udp_data_ready(struct sock *sk, int len) |
a246b010 | 824 | { |
9903cd1c CL |
825 | struct rpc_task *task; |
826 | struct rpc_xprt *xprt; | |
a246b010 | 827 | struct rpc_rqst *rovr; |
9903cd1c | 828 | struct sk_buff *skb; |
a246b010 | 829 | int err, repsize, copied; |
d8ed029d AD |
830 | u32 _xid; |
831 | __be32 *xp; | |
a246b010 CL |
832 | |
833 | read_lock(&sk->sk_callback_lock); | |
46121cf7 | 834 | dprintk("RPC: xs_udp_data_ready...\n"); |
9903cd1c | 835 | if (!(xprt = xprt_from_sock(sk))) |
a246b010 | 836 | goto out; |
a246b010 CL |
837 | |
838 | if ((skb = skb_recv_datagram(sk, 0, 1, &err)) == NULL) | |
839 | goto out; | |
840 | ||
841 | if (xprt->shutdown) | |
842 | goto dropit; | |
843 | ||
844 | repsize = skb->len - sizeof(struct udphdr); | |
845 | if (repsize < 4) { | |
46121cf7 | 846 | dprintk("RPC: impossible RPC reply size %d!\n", repsize); |
a246b010 CL |
847 | goto dropit; |
848 | } | |
849 | ||
850 | /* Copy the XID from the skb... */ | |
851 | xp = skb_header_pointer(skb, sizeof(struct udphdr), | |
852 | sizeof(_xid), &_xid); | |
853 | if (xp == NULL) | |
854 | goto dropit; | |
855 | ||
856 | /* Look up and lock the request corresponding to the given XID */ | |
4a0f8c04 | 857 | spin_lock(&xprt->transport_lock); |
a246b010 CL |
858 | rovr = xprt_lookup_rqst(xprt, *xp); |
859 | if (!rovr) | |
860 | goto out_unlock; | |
861 | task = rovr->rq_task; | |
862 | ||
a246b010 CL |
863 | if ((copied = rovr->rq_private_buf.buflen) > repsize) |
864 | copied = repsize; | |
865 | ||
866 | /* Suck it into the iovec, verify checksum if not done by hw. */ | |
1781f7f5 HX |
867 | if (csum_partial_copy_to_xdr(&rovr->rq_private_buf, skb)) { |
868 | UDPX_INC_STATS_BH(sk, UDP_MIB_INERRORS); | |
a246b010 | 869 | goto out_unlock; |
1781f7f5 HX |
870 | } |
871 | ||
872 | UDPX_INC_STATS_BH(sk, UDP_MIB_INDATAGRAMS); | |
a246b010 CL |
873 | |
874 | /* Something worked... */ | |
875 | dst_confirm(skb->dst); | |
876 | ||
1570c1e4 CL |
877 | xprt_adjust_cwnd(task, copied); |
878 | xprt_update_rtt(task); | |
879 | xprt_complete_rqst(task, copied); | |
a246b010 CL |
880 | |
881 | out_unlock: | |
4a0f8c04 | 882 | spin_unlock(&xprt->transport_lock); |
a246b010 CL |
883 | dropit: |
884 | skb_free_datagram(sk, skb); | |
885 | out: | |
886 | read_unlock(&sk->sk_callback_lock); | |
887 | } | |
888 | ||
dd456471 | 889 | static inline void xs_tcp_read_fraghdr(struct rpc_xprt *xprt, struct xdr_skb_reader *desc) |
a246b010 | 890 | { |
51971139 | 891 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
a246b010 CL |
892 | size_t len, used; |
893 | char *p; | |
894 | ||
51971139 CL |
895 | p = ((char *) &transport->tcp_fraghdr) + transport->tcp_offset; |
896 | len = sizeof(transport->tcp_fraghdr) - transport->tcp_offset; | |
9d292316 | 897 | used = xdr_skb_read_bits(desc, p, len); |
51971139 | 898 | transport->tcp_offset += used; |
a246b010 CL |
899 | if (used != len) |
900 | return; | |
808012fb | 901 | |
51971139 CL |
902 | transport->tcp_reclen = ntohl(transport->tcp_fraghdr); |
903 | if (transport->tcp_reclen & RPC_LAST_STREAM_FRAGMENT) | |
e136d092 | 904 | transport->tcp_flags |= TCP_RCV_LAST_FRAG; |
a246b010 | 905 | else |
e136d092 | 906 | transport->tcp_flags &= ~TCP_RCV_LAST_FRAG; |
51971139 | 907 | transport->tcp_reclen &= RPC_FRAGMENT_SIZE_MASK; |
808012fb | 908 | |
e136d092 | 909 | transport->tcp_flags &= ~TCP_RCV_COPY_FRAGHDR; |
51971139 | 910 | transport->tcp_offset = 0; |
808012fb | 911 | |
a246b010 | 912 | /* Sanity check of the record length */ |
51971139 | 913 | if (unlikely(transport->tcp_reclen < 4)) { |
46121cf7 | 914 | dprintk("RPC: invalid TCP record fragment length\n"); |
3ebb067d | 915 | xprt_force_disconnect(xprt); |
9903cd1c | 916 | return; |
a246b010 | 917 | } |
46121cf7 | 918 | dprintk("RPC: reading TCP record fragment of length %d\n", |
51971139 | 919 | transport->tcp_reclen); |
a246b010 CL |
920 | } |
921 | ||
51971139 | 922 | static void xs_tcp_check_fraghdr(struct sock_xprt *transport) |
a246b010 | 923 | { |
51971139 | 924 | if (transport->tcp_offset == transport->tcp_reclen) { |
e136d092 | 925 | transport->tcp_flags |= TCP_RCV_COPY_FRAGHDR; |
51971139 | 926 | transport->tcp_offset = 0; |
e136d092 CL |
927 | if (transport->tcp_flags & TCP_RCV_LAST_FRAG) { |
928 | transport->tcp_flags &= ~TCP_RCV_COPY_DATA; | |
929 | transport->tcp_flags |= TCP_RCV_COPY_XID; | |
51971139 | 930 | transport->tcp_copied = 0; |
a246b010 CL |
931 | } |
932 | } | |
933 | } | |
934 | ||
dd456471 | 935 | static inline void xs_tcp_read_xid(struct sock_xprt *transport, struct xdr_skb_reader *desc) |
a246b010 CL |
936 | { |
937 | size_t len, used; | |
938 | char *p; | |
939 | ||
51971139 | 940 | len = sizeof(transport->tcp_xid) - transport->tcp_offset; |
46121cf7 | 941 | dprintk("RPC: reading XID (%Zu bytes)\n", len); |
51971139 | 942 | p = ((char *) &transport->tcp_xid) + transport->tcp_offset; |
9d292316 | 943 | used = xdr_skb_read_bits(desc, p, len); |
51971139 | 944 | transport->tcp_offset += used; |
a246b010 CL |
945 | if (used != len) |
946 | return; | |
e136d092 CL |
947 | transport->tcp_flags &= ~TCP_RCV_COPY_XID; |
948 | transport->tcp_flags |= TCP_RCV_COPY_DATA; | |
51971139 | 949 | transport->tcp_copied = 4; |
46121cf7 | 950 | dprintk("RPC: reading reply for XID %08x\n", |
51971139 CL |
951 | ntohl(transport->tcp_xid)); |
952 | xs_tcp_check_fraghdr(transport); | |
a246b010 CL |
953 | } |
954 | ||
dd456471 | 955 | static inline void xs_tcp_read_request(struct rpc_xprt *xprt, struct xdr_skb_reader *desc) |
a246b010 | 956 | { |
51971139 | 957 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
a246b010 CL |
958 | struct rpc_rqst *req; |
959 | struct xdr_buf *rcvbuf; | |
960 | size_t len; | |
961 | ssize_t r; | |
962 | ||
963 | /* Find and lock the request corresponding to this xid */ | |
4a0f8c04 | 964 | spin_lock(&xprt->transport_lock); |
51971139 | 965 | req = xprt_lookup_rqst(xprt, transport->tcp_xid); |
a246b010 | 966 | if (!req) { |
e136d092 | 967 | transport->tcp_flags &= ~TCP_RCV_COPY_DATA; |
46121cf7 | 968 | dprintk("RPC: XID %08x request not found!\n", |
51971139 | 969 | ntohl(transport->tcp_xid)); |
4a0f8c04 | 970 | spin_unlock(&xprt->transport_lock); |
a246b010 CL |
971 | return; |
972 | } | |
973 | ||
974 | rcvbuf = &req->rq_private_buf; | |
975 | len = desc->count; | |
51971139 | 976 | if (len > transport->tcp_reclen - transport->tcp_offset) { |
dd456471 | 977 | struct xdr_skb_reader my_desc; |
a246b010 | 978 | |
51971139 | 979 | len = transport->tcp_reclen - transport->tcp_offset; |
a246b010 CL |
980 | memcpy(&my_desc, desc, sizeof(my_desc)); |
981 | my_desc.count = len; | |
51971139 | 982 | r = xdr_partial_copy_from_skb(rcvbuf, transport->tcp_copied, |
9d292316 | 983 | &my_desc, xdr_skb_read_bits); |
a246b010 CL |
984 | desc->count -= r; |
985 | desc->offset += r; | |
986 | } else | |
51971139 | 987 | r = xdr_partial_copy_from_skb(rcvbuf, transport->tcp_copied, |
9d292316 | 988 | desc, xdr_skb_read_bits); |
a246b010 CL |
989 | |
990 | if (r > 0) { | |
51971139 CL |
991 | transport->tcp_copied += r; |
992 | transport->tcp_offset += r; | |
a246b010 CL |
993 | } |
994 | if (r != len) { | |
995 | /* Error when copying to the receive buffer, | |
996 | * usually because we weren't able to allocate | |
997 | * additional buffer pages. All we can do now | |
e136d092 | 998 | * is turn off TCP_RCV_COPY_DATA, so the request |
a246b010 CL |
999 | * will not receive any additional updates, |
1000 | * and time out. | |
1001 | * Any remaining data from this record will | |
1002 | * be discarded. | |
1003 | */ | |
e136d092 | 1004 | transport->tcp_flags &= ~TCP_RCV_COPY_DATA; |
46121cf7 | 1005 | dprintk("RPC: XID %08x truncated request\n", |
51971139 | 1006 | ntohl(transport->tcp_xid)); |
46121cf7 CL |
1007 | dprintk("RPC: xprt = %p, tcp_copied = %lu, " |
1008 | "tcp_offset = %u, tcp_reclen = %u\n", | |
1009 | xprt, transport->tcp_copied, | |
1010 | transport->tcp_offset, transport->tcp_reclen); | |
a246b010 CL |
1011 | goto out; |
1012 | } | |
1013 | ||
46121cf7 | 1014 | dprintk("RPC: XID %08x read %Zd bytes\n", |
51971139 | 1015 | ntohl(transport->tcp_xid), r); |
46121cf7 CL |
1016 | dprintk("RPC: xprt = %p, tcp_copied = %lu, tcp_offset = %u, " |
1017 | "tcp_reclen = %u\n", xprt, transport->tcp_copied, | |
1018 | transport->tcp_offset, transport->tcp_reclen); | |
51971139 CL |
1019 | |
1020 | if (transport->tcp_copied == req->rq_private_buf.buflen) | |
e136d092 | 1021 | transport->tcp_flags &= ~TCP_RCV_COPY_DATA; |
51971139 | 1022 | else if (transport->tcp_offset == transport->tcp_reclen) { |
e136d092 CL |
1023 | if (transport->tcp_flags & TCP_RCV_LAST_FRAG) |
1024 | transport->tcp_flags &= ~TCP_RCV_COPY_DATA; | |
a246b010 CL |
1025 | } |
1026 | ||
1027 | out: | |
e136d092 | 1028 | if (!(transport->tcp_flags & TCP_RCV_COPY_DATA)) |
51971139 | 1029 | xprt_complete_rqst(req->rq_task, transport->tcp_copied); |
4a0f8c04 | 1030 | spin_unlock(&xprt->transport_lock); |
51971139 | 1031 | xs_tcp_check_fraghdr(transport); |
a246b010 CL |
1032 | } |
1033 | ||
dd456471 | 1034 | static inline void xs_tcp_read_discard(struct sock_xprt *transport, struct xdr_skb_reader *desc) |
a246b010 CL |
1035 | { |
1036 | size_t len; | |
1037 | ||
51971139 | 1038 | len = transport->tcp_reclen - transport->tcp_offset; |
a246b010 CL |
1039 | if (len > desc->count) |
1040 | len = desc->count; | |
1041 | desc->count -= len; | |
1042 | desc->offset += len; | |
51971139 | 1043 | transport->tcp_offset += len; |
46121cf7 | 1044 | dprintk("RPC: discarded %Zu bytes\n", len); |
51971139 | 1045 | xs_tcp_check_fraghdr(transport); |
a246b010 CL |
1046 | } |
1047 | ||
9903cd1c | 1048 | static int xs_tcp_data_recv(read_descriptor_t *rd_desc, struct sk_buff *skb, unsigned int offset, size_t len) |
a246b010 CL |
1049 | { |
1050 | struct rpc_xprt *xprt = rd_desc->arg.data; | |
51971139 | 1051 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
dd456471 | 1052 | struct xdr_skb_reader desc = { |
a246b010 CL |
1053 | .skb = skb, |
1054 | .offset = offset, | |
1055 | .count = len, | |
9903cd1c | 1056 | }; |
a246b010 | 1057 | |
46121cf7 | 1058 | dprintk("RPC: xs_tcp_data_recv started\n"); |
a246b010 CL |
1059 | do { |
1060 | /* Read in a new fragment marker if necessary */ | |
1061 | /* Can we ever really expect to get completely empty fragments? */ | |
e136d092 | 1062 | if (transport->tcp_flags & TCP_RCV_COPY_FRAGHDR) { |
9903cd1c | 1063 | xs_tcp_read_fraghdr(xprt, &desc); |
a246b010 CL |
1064 | continue; |
1065 | } | |
1066 | /* Read in the xid if necessary */ | |
e136d092 | 1067 | if (transport->tcp_flags & TCP_RCV_COPY_XID) { |
51971139 | 1068 | xs_tcp_read_xid(transport, &desc); |
a246b010 CL |
1069 | continue; |
1070 | } | |
1071 | /* Read in the request data */ | |
e136d092 | 1072 | if (transport->tcp_flags & TCP_RCV_COPY_DATA) { |
9903cd1c | 1073 | xs_tcp_read_request(xprt, &desc); |
a246b010 CL |
1074 | continue; |
1075 | } | |
1076 | /* Skip over any trailing bytes on short reads */ | |
51971139 | 1077 | xs_tcp_read_discard(transport, &desc); |
a246b010 | 1078 | } while (desc.count); |
46121cf7 | 1079 | dprintk("RPC: xs_tcp_data_recv done\n"); |
a246b010 CL |
1080 | return len - desc.count; |
1081 | } | |
1082 | ||
9903cd1c CL |
1083 | /** |
1084 | * xs_tcp_data_ready - "data ready" callback for TCP sockets | |
1085 | * @sk: socket with data to read | |
1086 | * @bytes: how much data to read | |
1087 | * | |
1088 | */ | |
1089 | static void xs_tcp_data_ready(struct sock *sk, int bytes) | |
a246b010 CL |
1090 | { |
1091 | struct rpc_xprt *xprt; | |
1092 | read_descriptor_t rd_desc; | |
ff2d7db8 | 1093 | int read; |
a246b010 | 1094 | |
46121cf7 CL |
1095 | dprintk("RPC: xs_tcp_data_ready...\n"); |
1096 | ||
a246b010 | 1097 | read_lock(&sk->sk_callback_lock); |
9903cd1c | 1098 | if (!(xprt = xprt_from_sock(sk))) |
a246b010 | 1099 | goto out; |
a246b010 CL |
1100 | if (xprt->shutdown) |
1101 | goto out; | |
1102 | ||
9903cd1c | 1103 | /* We use rd_desc to pass struct xprt to xs_tcp_data_recv */ |
a246b010 | 1104 | rd_desc.arg.data = xprt; |
ff2d7db8 TM |
1105 | do { |
1106 | rd_desc.count = 65536; | |
1107 | read = tcp_read_sock(sk, &rd_desc, xs_tcp_data_recv); | |
1108 | } while (read > 0); | |
a246b010 CL |
1109 | out: |
1110 | read_unlock(&sk->sk_callback_lock); | |
1111 | } | |
1112 | ||
9903cd1c CL |
1113 | /** |
1114 | * xs_tcp_state_change - callback to handle TCP socket state changes | |
1115 | * @sk: socket whose state has changed | |
1116 | * | |
1117 | */ | |
1118 | static void xs_tcp_state_change(struct sock *sk) | |
a246b010 | 1119 | { |
9903cd1c | 1120 | struct rpc_xprt *xprt; |
a246b010 CL |
1121 | |
1122 | read_lock(&sk->sk_callback_lock); | |
1123 | if (!(xprt = xprt_from_sock(sk))) | |
1124 | goto out; | |
46121cf7 CL |
1125 | dprintk("RPC: xs_tcp_state_change client %p...\n", xprt); |
1126 | dprintk("RPC: state %x conn %d dead %d zapped %d\n", | |
1127 | sk->sk_state, xprt_connected(xprt), | |
1128 | sock_flag(sk, SOCK_DEAD), | |
1129 | sock_flag(sk, SOCK_ZAPPED)); | |
a246b010 CL |
1130 | |
1131 | switch (sk->sk_state) { | |
1132 | case TCP_ESTABLISHED: | |
4a0f8c04 | 1133 | spin_lock_bh(&xprt->transport_lock); |
a246b010 | 1134 | if (!xprt_test_and_set_connected(xprt)) { |
51971139 CL |
1135 | struct sock_xprt *transport = container_of(xprt, |
1136 | struct sock_xprt, xprt); | |
1137 | ||
a246b010 | 1138 | /* Reset TCP record info */ |
51971139 CL |
1139 | transport->tcp_offset = 0; |
1140 | transport->tcp_reclen = 0; | |
1141 | transport->tcp_copied = 0; | |
e136d092 CL |
1142 | transport->tcp_flags = |
1143 | TCP_RCV_COPY_FRAGHDR | TCP_RCV_COPY_XID; | |
51971139 | 1144 | |
44fbac22 | 1145 | xprt_wake_pending_tasks(xprt, 0); |
a246b010 | 1146 | } |
4a0f8c04 | 1147 | spin_unlock_bh(&xprt->transport_lock); |
a246b010 | 1148 | break; |
3b948ae5 TM |
1149 | case TCP_FIN_WAIT1: |
1150 | /* The client initiated a shutdown of the socket */ | |
663b8858 | 1151 | xprt->reestablish_timeout = 0; |
3b948ae5 TM |
1152 | set_bit(XPRT_CLOSING, &xprt->state); |
1153 | smp_mb__before_clear_bit(); | |
1154 | clear_bit(XPRT_CONNECTED, &xprt->state); | |
ef803670 | 1155 | clear_bit(XPRT_CLOSE_WAIT, &xprt->state); |
3b948ae5 | 1156 | smp_mb__after_clear_bit(); |
a246b010 | 1157 | break; |
632e3bdc | 1158 | case TCP_CLOSE_WAIT: |
3b948ae5 TM |
1159 | /* The server initiated a shutdown of the socket */ |
1160 | set_bit(XPRT_CLOSING, &xprt->state); | |
66af1e55 | 1161 | xprt_force_disconnect(xprt); |
663b8858 TM |
1162 | case TCP_SYN_SENT: |
1163 | case TCP_CLOSING: | |
1164 | /* | |
1165 | * If the server closed down the connection, make sure that | |
1166 | * we back off before reconnecting | |
1167 | */ | |
1168 | if (xprt->reestablish_timeout < XS_TCP_INIT_REEST_TO) | |
1169 | xprt->reestablish_timeout = XS_TCP_INIT_REEST_TO; | |
3b948ae5 TM |
1170 | break; |
1171 | case TCP_LAST_ACK: | |
1172 | smp_mb__before_clear_bit(); | |
1173 | clear_bit(XPRT_CONNECTED, &xprt->state); | |
1174 | smp_mb__after_clear_bit(); | |
1175 | break; | |
1176 | case TCP_CLOSE: | |
1177 | smp_mb__before_clear_bit(); | |
ef803670 | 1178 | clear_bit(XPRT_CLOSE_WAIT, &xprt->state); |
3b948ae5 TM |
1179 | clear_bit(XPRT_CLOSING, &xprt->state); |
1180 | smp_mb__after_clear_bit(); | |
1181 | /* Mark transport as closed and wake up all pending tasks */ | |
62da3b24 | 1182 | xprt_disconnect_done(xprt); |
a246b010 CL |
1183 | } |
1184 | out: | |
1185 | read_unlock(&sk->sk_callback_lock); | |
1186 | } | |
1187 | ||
9903cd1c | 1188 | /** |
c7b2cae8 CL |
1189 | * xs_udp_write_space - callback invoked when socket buffer space |
1190 | * becomes available | |
9903cd1c CL |
1191 | * @sk: socket whose state has changed |
1192 | * | |
a246b010 CL |
1193 | * Called when more output buffer space is available for this socket. |
1194 | * We try not to wake our writers until they can make "significant" | |
c7b2cae8 | 1195 | * progress, otherwise we'll waste resources thrashing kernel_sendmsg |
a246b010 CL |
1196 | * with a bunch of small requests. |
1197 | */ | |
c7b2cae8 | 1198 | static void xs_udp_write_space(struct sock *sk) |
a246b010 | 1199 | { |
a246b010 | 1200 | read_lock(&sk->sk_callback_lock); |
a246b010 | 1201 | |
c7b2cae8 CL |
1202 | /* from net/core/sock.c:sock_def_write_space */ |
1203 | if (sock_writeable(sk)) { | |
1204 | struct socket *sock; | |
1205 | struct rpc_xprt *xprt; | |
1206 | ||
1207 | if (unlikely(!(sock = sk->sk_socket))) | |
a246b010 | 1208 | goto out; |
b6ddf64f TM |
1209 | clear_bit(SOCK_NOSPACE, &sock->flags); |
1210 | ||
c7b2cae8 CL |
1211 | if (unlikely(!(xprt = xprt_from_sock(sk)))) |
1212 | goto out; | |
b6ddf64f | 1213 | if (test_and_clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags) == 0) |
a246b010 | 1214 | goto out; |
c7b2cae8 CL |
1215 | |
1216 | xprt_write_space(xprt); | |
a246b010 CL |
1217 | } |
1218 | ||
c7b2cae8 CL |
1219 | out: |
1220 | read_unlock(&sk->sk_callback_lock); | |
1221 | } | |
a246b010 | 1222 | |
c7b2cae8 CL |
1223 | /** |
1224 | * xs_tcp_write_space - callback invoked when socket buffer space | |
1225 | * becomes available | |
1226 | * @sk: socket whose state has changed | |
1227 | * | |
1228 | * Called when more output buffer space is available for this socket. | |
1229 | * We try not to wake our writers until they can make "significant" | |
1230 | * progress, otherwise we'll waste resources thrashing kernel_sendmsg | |
1231 | * with a bunch of small requests. | |
1232 | */ | |
1233 | static void xs_tcp_write_space(struct sock *sk) | |
1234 | { | |
1235 | read_lock(&sk->sk_callback_lock); | |
1236 | ||
1237 | /* from net/core/stream.c:sk_stream_write_space */ | |
1238 | if (sk_stream_wspace(sk) >= sk_stream_min_wspace(sk)) { | |
1239 | struct socket *sock; | |
1240 | struct rpc_xprt *xprt; | |
1241 | ||
1242 | if (unlikely(!(sock = sk->sk_socket))) | |
1243 | goto out; | |
b6ddf64f TM |
1244 | clear_bit(SOCK_NOSPACE, &sock->flags); |
1245 | ||
c7b2cae8 CL |
1246 | if (unlikely(!(xprt = xprt_from_sock(sk)))) |
1247 | goto out; | |
b6ddf64f | 1248 | if (test_and_clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags) == 0) |
c7b2cae8 CL |
1249 | goto out; |
1250 | ||
1251 | xprt_write_space(xprt); | |
1252 | } | |
1253 | ||
1254 | out: | |
a246b010 CL |
1255 | read_unlock(&sk->sk_callback_lock); |
1256 | } | |
1257 | ||
470056c2 | 1258 | static void xs_udp_do_set_buffer_size(struct rpc_xprt *xprt) |
a246b010 | 1259 | { |
ee0ac0c2 CL |
1260 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
1261 | struct sock *sk = transport->inet; | |
a246b010 | 1262 | |
7c6e066e | 1263 | if (transport->rcvsize) { |
a246b010 | 1264 | sk->sk_userlocks |= SOCK_RCVBUF_LOCK; |
7c6e066e | 1265 | sk->sk_rcvbuf = transport->rcvsize * xprt->max_reqs * 2; |
a246b010 | 1266 | } |
7c6e066e | 1267 | if (transport->sndsize) { |
a246b010 | 1268 | sk->sk_userlocks |= SOCK_SNDBUF_LOCK; |
7c6e066e | 1269 | sk->sk_sndbuf = transport->sndsize * xprt->max_reqs * 2; |
a246b010 CL |
1270 | sk->sk_write_space(sk); |
1271 | } | |
1272 | } | |
1273 | ||
43118c29 | 1274 | /** |
470056c2 | 1275 | * xs_udp_set_buffer_size - set send and receive limits |
43118c29 | 1276 | * @xprt: generic transport |
470056c2 CL |
1277 | * @sndsize: requested size of send buffer, in bytes |
1278 | * @rcvsize: requested size of receive buffer, in bytes | |
43118c29 | 1279 | * |
470056c2 | 1280 | * Set socket send and receive buffer size limits. |
43118c29 | 1281 | */ |
470056c2 | 1282 | static void xs_udp_set_buffer_size(struct rpc_xprt *xprt, size_t sndsize, size_t rcvsize) |
43118c29 | 1283 | { |
7c6e066e CL |
1284 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
1285 | ||
1286 | transport->sndsize = 0; | |
470056c2 | 1287 | if (sndsize) |
7c6e066e CL |
1288 | transport->sndsize = sndsize + 1024; |
1289 | transport->rcvsize = 0; | |
470056c2 | 1290 | if (rcvsize) |
7c6e066e | 1291 | transport->rcvsize = rcvsize + 1024; |
470056c2 CL |
1292 | |
1293 | xs_udp_do_set_buffer_size(xprt); | |
43118c29 CL |
1294 | } |
1295 | ||
46c0ee8b CL |
1296 | /** |
1297 | * xs_udp_timer - called when a retransmit timeout occurs on a UDP transport | |
1298 | * @task: task that timed out | |
1299 | * | |
1300 | * Adjust the congestion window after a retransmit timeout has occurred. | |
1301 | */ | |
1302 | static void xs_udp_timer(struct rpc_task *task) | |
1303 | { | |
1304 | xprt_adjust_cwnd(task, -ETIMEDOUT); | |
1305 | } | |
1306 | ||
b85d8806 CL |
1307 | static unsigned short xs_get_random_port(void) |
1308 | { | |
1309 | unsigned short range = xprt_max_resvport - xprt_min_resvport; | |
1310 | unsigned short rand = (unsigned short) net_random() % range; | |
1311 | return rand + xprt_min_resvport; | |
1312 | } | |
1313 | ||
92200412 CL |
1314 | /** |
1315 | * xs_set_port - reset the port number in the remote endpoint address | |
1316 | * @xprt: generic transport | |
1317 | * @port: new port number | |
1318 | * | |
1319 | */ | |
1320 | static void xs_set_port(struct rpc_xprt *xprt, unsigned short port) | |
1321 | { | |
95392c59 | 1322 | struct sockaddr *addr = xs_addr(xprt); |
c4efcb1d | 1323 | |
46121cf7 | 1324 | dprintk("RPC: setting port for xprt %p to %u\n", xprt, port); |
c4efcb1d | 1325 | |
20612005 CL |
1326 | switch (addr->sa_family) { |
1327 | case AF_INET: | |
1328 | ((struct sockaddr_in *)addr)->sin_port = htons(port); | |
1329 | break; | |
1330 | case AF_INET6: | |
1331 | ((struct sockaddr_in6 *)addr)->sin6_port = htons(port); | |
1332 | break; | |
1333 | default: | |
1334 | BUG(); | |
1335 | } | |
92200412 CL |
1336 | } |
1337 | ||
67a391d7 TM |
1338 | static unsigned short xs_get_srcport(struct sock_xprt *transport, struct socket *sock) |
1339 | { | |
1340 | unsigned short port = transport->port; | |
1341 | ||
1342 | if (port == 0 && transport->xprt.resvport) | |
1343 | port = xs_get_random_port(); | |
1344 | return port; | |
1345 | } | |
1346 | ||
1347 | static unsigned short xs_next_srcport(struct sock_xprt *transport, struct socket *sock, unsigned short port) | |
1348 | { | |
1349 | if (transport->port != 0) | |
1350 | transport->port = 0; | |
1351 | if (!transport->xprt.resvport) | |
1352 | return 0; | |
1353 | if (port <= xprt_min_resvport || port > xprt_max_resvport) | |
1354 | return xprt_max_resvport; | |
1355 | return --port; | |
1356 | } | |
1357 | ||
7dc753f0 | 1358 | static int xs_bind4(struct sock_xprt *transport, struct socket *sock) |
a246b010 CL |
1359 | { |
1360 | struct sockaddr_in myaddr = { | |
1361 | .sin_family = AF_INET, | |
1362 | }; | |
d3bc9a1d | 1363 | struct sockaddr_in *sa; |
67a391d7 TM |
1364 | int err, nloop = 0; |
1365 | unsigned short port = xs_get_srcport(transport, sock); | |
1366 | unsigned short last; | |
a246b010 | 1367 | |
d3bc9a1d FM |
1368 | sa = (struct sockaddr_in *)&transport->addr; |
1369 | myaddr.sin_addr = sa->sin_addr; | |
a246b010 CL |
1370 | do { |
1371 | myaddr.sin_port = htons(port); | |
e6242e92 | 1372 | err = kernel_bind(sock, (struct sockaddr *) &myaddr, |
a246b010 | 1373 | sizeof(myaddr)); |
67a391d7 | 1374 | if (port == 0) |
d3bc9a1d | 1375 | break; |
a246b010 | 1376 | if (err == 0) { |
c8475461 | 1377 | transport->port = port; |
d3bc9a1d | 1378 | break; |
a246b010 | 1379 | } |
67a391d7 TM |
1380 | last = port; |
1381 | port = xs_next_srcport(transport, sock, port); | |
1382 | if (port > last) | |
1383 | nloop++; | |
1384 | } while (err == -EADDRINUSE && nloop != 2); | |
7dc753f0 CL |
1385 | dprintk("RPC: %s "NIPQUAD_FMT":%u: %s (%d)\n", |
1386 | __FUNCTION__, NIPQUAD(myaddr.sin_addr), | |
1387 | port, err ? "failed" : "ok", err); | |
a246b010 CL |
1388 | return err; |
1389 | } | |
1390 | ||
90058d37 CL |
1391 | static int xs_bind6(struct sock_xprt *transport, struct socket *sock) |
1392 | { | |
1393 | struct sockaddr_in6 myaddr = { | |
1394 | .sin6_family = AF_INET6, | |
1395 | }; | |
1396 | struct sockaddr_in6 *sa; | |
67a391d7 TM |
1397 | int err, nloop = 0; |
1398 | unsigned short port = xs_get_srcport(transport, sock); | |
1399 | unsigned short last; | |
90058d37 | 1400 | |
90058d37 CL |
1401 | sa = (struct sockaddr_in6 *)&transport->addr; |
1402 | myaddr.sin6_addr = sa->sin6_addr; | |
1403 | do { | |
1404 | myaddr.sin6_port = htons(port); | |
1405 | err = kernel_bind(sock, (struct sockaddr *) &myaddr, | |
1406 | sizeof(myaddr)); | |
67a391d7 | 1407 | if (port == 0) |
90058d37 CL |
1408 | break; |
1409 | if (err == 0) { | |
1410 | transport->port = port; | |
1411 | break; | |
1412 | } | |
67a391d7 TM |
1413 | last = port; |
1414 | port = xs_next_srcport(transport, sock, port); | |
1415 | if (port > last) | |
1416 | nloop++; | |
1417 | } while (err == -EADDRINUSE && nloop != 2); | |
90058d37 CL |
1418 | dprintk("RPC: xs_bind6 "NIP6_FMT":%u: %s (%d)\n", |
1419 | NIP6(myaddr.sin6_addr), port, err ? "failed" : "ok", err); | |
a246b010 CL |
1420 | return err; |
1421 | } | |
1422 | ||
ed07536e PZ |
1423 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
1424 | static struct lock_class_key xs_key[2]; | |
1425 | static struct lock_class_key xs_slock_key[2]; | |
1426 | ||
8945ee5e | 1427 | static inline void xs_reclassify_socket4(struct socket *sock) |
ed07536e PZ |
1428 | { |
1429 | struct sock *sk = sock->sk; | |
8945ee5e | 1430 | |
02b3d346 | 1431 | BUG_ON(sock_owned_by_user(sk)); |
8945ee5e CL |
1432 | sock_lock_init_class_and_name(sk, "slock-AF_INET-RPC", |
1433 | &xs_slock_key[0], "sk_lock-AF_INET-RPC", &xs_key[0]); | |
1434 | } | |
ed07536e | 1435 | |
8945ee5e CL |
1436 | static inline void xs_reclassify_socket6(struct socket *sock) |
1437 | { | |
1438 | struct sock *sk = sock->sk; | |
ed07536e | 1439 | |
f4921aff | 1440 | BUG_ON(sock_owned_by_user(sk)); |
8945ee5e CL |
1441 | sock_lock_init_class_and_name(sk, "slock-AF_INET6-RPC", |
1442 | &xs_slock_key[1], "sk_lock-AF_INET6-RPC", &xs_key[1]); | |
ed07536e PZ |
1443 | } |
1444 | #else | |
8945ee5e CL |
1445 | static inline void xs_reclassify_socket4(struct socket *sock) |
1446 | { | |
1447 | } | |
1448 | ||
1449 | static inline void xs_reclassify_socket6(struct socket *sock) | |
ed07536e PZ |
1450 | { |
1451 | } | |
1452 | #endif | |
1453 | ||
16be2d20 CL |
1454 | static void xs_udp_finish_connecting(struct rpc_xprt *xprt, struct socket *sock) |
1455 | { | |
1456 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); | |
1457 | ||
1458 | if (!transport->inet) { | |
1459 | struct sock *sk = sock->sk; | |
1460 | ||
1461 | write_lock_bh(&sk->sk_callback_lock); | |
1462 | ||
1463 | sk->sk_user_data = xprt; | |
1464 | transport->old_data_ready = sk->sk_data_ready; | |
1465 | transport->old_state_change = sk->sk_state_change; | |
1466 | transport->old_write_space = sk->sk_write_space; | |
1467 | sk->sk_data_ready = xs_udp_data_ready; | |
1468 | sk->sk_write_space = xs_udp_write_space; | |
1469 | sk->sk_no_check = UDP_CSUM_NORCV; | |
1470 | sk->sk_allocation = GFP_ATOMIC; | |
1471 | ||
1472 | xprt_set_connected(xprt); | |
1473 | ||
1474 | /* Reset to new socket */ | |
1475 | transport->sock = sock; | |
1476 | transport->inet = sk; | |
1477 | ||
1478 | write_unlock_bh(&sk->sk_callback_lock); | |
1479 | } | |
1480 | xs_udp_do_set_buffer_size(xprt); | |
1481 | } | |
1482 | ||
b0d93ad5 | 1483 | /** |
9c3d72de | 1484 | * xs_udp_connect_worker4 - set up a UDP socket |
65f27f38 | 1485 | * @work: RPC transport to connect |
b0d93ad5 CL |
1486 | * |
1487 | * Invoked by a work queue tasklet. | |
1488 | */ | |
9c3d72de | 1489 | static void xs_udp_connect_worker4(struct work_struct *work) |
a246b010 | 1490 | { |
34161db6 TM |
1491 | struct sock_xprt *transport = |
1492 | container_of(work, struct sock_xprt, connect_worker.work); | |
c8475461 | 1493 | struct rpc_xprt *xprt = &transport->xprt; |
ee0ac0c2 | 1494 | struct socket *sock = transport->sock; |
b0d93ad5 | 1495 | int err, status = -EIO; |
9903cd1c | 1496 | |
ec739ef0 | 1497 | if (xprt->shutdown || !xprt_bound(xprt)) |
b0d93ad5 | 1498 | goto out; |
9903cd1c | 1499 | |
b0d93ad5 CL |
1500 | /* Start by resetting any existing state */ |
1501 | xs_close(xprt); | |
9903cd1c | 1502 | |
b0d93ad5 | 1503 | if ((err = sock_create_kern(PF_INET, SOCK_DGRAM, IPPROTO_UDP, &sock)) < 0) { |
46121cf7 | 1504 | dprintk("RPC: can't create UDP transport socket (%d).\n", -err); |
b0d93ad5 CL |
1505 | goto out; |
1506 | } | |
8945ee5e | 1507 | xs_reclassify_socket4(sock); |
9903cd1c | 1508 | |
7dc753f0 | 1509 | if (xs_bind4(transport, sock)) { |
b0d93ad5 CL |
1510 | sock_release(sock); |
1511 | goto out; | |
1512 | } | |
9903cd1c | 1513 | |
46121cf7 | 1514 | dprintk("RPC: worker connecting xprt %p to address: %s\n", |
7559c7a2 | 1515 | xprt, xprt->address_strings[RPC_DISPLAY_ALL]); |
edb267a6 | 1516 | |
16be2d20 | 1517 | xs_udp_finish_connecting(xprt, sock); |
b0d93ad5 CL |
1518 | status = 0; |
1519 | out: | |
1520 | xprt_wake_pending_tasks(xprt, status); | |
1521 | xprt_clear_connecting(xprt); | |
a246b010 | 1522 | } |
a246b010 | 1523 | |
68e220bd CL |
1524 | /** |
1525 | * xs_udp_connect_worker6 - set up a UDP socket | |
1526 | * @work: RPC transport to connect | |
1527 | * | |
1528 | * Invoked by a work queue tasklet. | |
1529 | */ | |
1530 | static void xs_udp_connect_worker6(struct work_struct *work) | |
1531 | { | |
1532 | struct sock_xprt *transport = | |
1533 | container_of(work, struct sock_xprt, connect_worker.work); | |
1534 | struct rpc_xprt *xprt = &transport->xprt; | |
1535 | struct socket *sock = transport->sock; | |
1536 | int err, status = -EIO; | |
a246b010 | 1537 | |
68e220bd CL |
1538 | if (xprt->shutdown || !xprt_bound(xprt)) |
1539 | goto out; | |
b0d93ad5 | 1540 | |
68e220bd CL |
1541 | /* Start by resetting any existing state */ |
1542 | xs_close(xprt); | |
a246b010 | 1543 | |
68e220bd CL |
1544 | if ((err = sock_create_kern(PF_INET6, SOCK_DGRAM, IPPROTO_UDP, &sock)) < 0) { |
1545 | dprintk("RPC: can't create UDP transport socket (%d).\n", -err); | |
1546 | goto out; | |
1547 | } | |
8945ee5e | 1548 | xs_reclassify_socket6(sock); |
a246b010 | 1549 | |
68e220bd CL |
1550 | if (xs_bind6(transport, sock) < 0) { |
1551 | sock_release(sock); | |
1552 | goto out; | |
b0d93ad5 | 1553 | } |
68e220bd CL |
1554 | |
1555 | dprintk("RPC: worker connecting xprt %p to address: %s\n", | |
1556 | xprt, xprt->address_strings[RPC_DISPLAY_ALL]); | |
1557 | ||
1558 | xs_udp_finish_connecting(xprt, sock); | |
b0d93ad5 CL |
1559 | status = 0; |
1560 | out: | |
1561 | xprt_wake_pending_tasks(xprt, status); | |
1562 | xprt_clear_connecting(xprt); | |
a246b010 CL |
1563 | } |
1564 | ||
3167e12c CL |
1565 | /* |
1566 | * We need to preserve the port number so the reply cache on the server can | |
1567 | * find our cached RPC replies when we get around to reconnecting. | |
1568 | */ | |
1569 | static void xs_tcp_reuse_connection(struct rpc_xprt *xprt) | |
1570 | { | |
1571 | int result; | |
ee0ac0c2 | 1572 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
3167e12c CL |
1573 | struct sockaddr any; |
1574 | ||
46121cf7 | 1575 | dprintk("RPC: disconnecting xprt %p to reuse port\n", xprt); |
3167e12c CL |
1576 | |
1577 | /* | |
1578 | * Disconnect the transport socket by doing a connect operation | |
1579 | * with AF_UNSPEC. This should return immediately... | |
1580 | */ | |
1581 | memset(&any, 0, sizeof(any)); | |
1582 | any.sa_family = AF_UNSPEC; | |
ee0ac0c2 | 1583 | result = kernel_connect(transport->sock, &any, sizeof(any), 0); |
3167e12c | 1584 | if (result) |
46121cf7 | 1585 | dprintk("RPC: AF_UNSPEC connect return code %d\n", |
3167e12c CL |
1586 | result); |
1587 | } | |
1588 | ||
16be2d20 | 1589 | static int xs_tcp_finish_connecting(struct rpc_xprt *xprt, struct socket *sock) |
a246b010 | 1590 | { |
16be2d20 | 1591 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
edb267a6 | 1592 | |
ee0ac0c2 | 1593 | if (!transport->inet) { |
b0d93ad5 CL |
1594 | struct sock *sk = sock->sk; |
1595 | ||
1596 | write_lock_bh(&sk->sk_callback_lock); | |
1597 | ||
1598 | sk->sk_user_data = xprt; | |
314dfd79 CL |
1599 | transport->old_data_ready = sk->sk_data_ready; |
1600 | transport->old_state_change = sk->sk_state_change; | |
1601 | transport->old_write_space = sk->sk_write_space; | |
b0d93ad5 CL |
1602 | sk->sk_data_ready = xs_tcp_data_ready; |
1603 | sk->sk_state_change = xs_tcp_state_change; | |
1604 | sk->sk_write_space = xs_tcp_write_space; | |
b079fa7b | 1605 | sk->sk_allocation = GFP_ATOMIC; |
3167e12c CL |
1606 | |
1607 | /* socket options */ | |
1608 | sk->sk_userlocks |= SOCK_BINDPORT_LOCK; | |
1609 | sock_reset_flag(sk, SOCK_LINGER); | |
1610 | tcp_sk(sk)->linger2 = 0; | |
1611 | tcp_sk(sk)->nonagle |= TCP_NAGLE_OFF; | |
b0d93ad5 CL |
1612 | |
1613 | xprt_clear_connected(xprt); | |
1614 | ||
1615 | /* Reset to new socket */ | |
ee0ac0c2 CL |
1616 | transport->sock = sock; |
1617 | transport->inet = sk; | |
b0d93ad5 CL |
1618 | |
1619 | write_unlock_bh(&sk->sk_callback_lock); | |
1620 | } | |
1621 | ||
1622 | /* Tell the socket layer to start connecting... */ | |
262ca07d CL |
1623 | xprt->stat.connect_count++; |
1624 | xprt->stat.connect_start = jiffies; | |
95392c59 | 1625 | return kernel_connect(sock, xs_addr(xprt), xprt->addrlen, O_NONBLOCK); |
16be2d20 CL |
1626 | } |
1627 | ||
9903cd1c | 1628 | /** |
9c3d72de | 1629 | * xs_tcp_connect_worker4 - connect a TCP socket to a remote endpoint |
65f27f38 | 1630 | * @work: RPC transport to connect |
9903cd1c CL |
1631 | * |
1632 | * Invoked by a work queue tasklet. | |
a246b010 | 1633 | */ |
9c3d72de | 1634 | static void xs_tcp_connect_worker4(struct work_struct *work) |
a246b010 | 1635 | { |
34161db6 TM |
1636 | struct sock_xprt *transport = |
1637 | container_of(work, struct sock_xprt, connect_worker.work); | |
c8475461 | 1638 | struct rpc_xprt *xprt = &transport->xprt; |
ee0ac0c2 | 1639 | struct socket *sock = transport->sock; |
b0d93ad5 | 1640 | int err, status = -EIO; |
a246b010 | 1641 | |
ec739ef0 | 1642 | if (xprt->shutdown || !xprt_bound(xprt)) |
a246b010 CL |
1643 | goto out; |
1644 | ||
ee0ac0c2 | 1645 | if (!sock) { |
3167e12c CL |
1646 | /* start from scratch */ |
1647 | if ((err = sock_create_kern(PF_INET, SOCK_STREAM, IPPROTO_TCP, &sock)) < 0) { | |
16be2d20 | 1648 | dprintk("RPC: can't create TCP transport socket (%d).\n", -err); |
3167e12c CL |
1649 | goto out; |
1650 | } | |
8945ee5e | 1651 | xs_reclassify_socket4(sock); |
a246b010 | 1652 | |
16be2d20 | 1653 | if (xs_bind4(transport, sock) < 0) { |
3167e12c CL |
1654 | sock_release(sock); |
1655 | goto out; | |
1656 | } | |
1657 | } else | |
1658 | /* "close" the socket, preserving the local port */ | |
1659 | xs_tcp_reuse_connection(xprt); | |
a246b010 | 1660 | |
46121cf7 | 1661 | dprintk("RPC: worker connecting xprt %p to address: %s\n", |
7559c7a2 | 1662 | xprt, xprt->address_strings[RPC_DISPLAY_ALL]); |
edb267a6 | 1663 | |
16be2d20 | 1664 | status = xs_tcp_finish_connecting(xprt, sock); |
46121cf7 CL |
1665 | dprintk("RPC: %p connect status %d connected %d sock state %d\n", |
1666 | xprt, -status, xprt_connected(xprt), | |
1667 | sock->sk->sk_state); | |
a246b010 CL |
1668 | if (status < 0) { |
1669 | switch (status) { | |
1670 | case -EINPROGRESS: | |
1671 | case -EALREADY: | |
1672 | goto out_clear; | |
3167e12c CL |
1673 | case -ECONNREFUSED: |
1674 | case -ECONNRESET: | |
1675 | /* retry with existing socket, after a delay */ | |
1676 | break; | |
1677 | default: | |
1678 | /* get rid of existing socket, and retry */ | |
e06799f9 | 1679 | xs_tcp_shutdown(xprt); |
a246b010 CL |
1680 | } |
1681 | } | |
1682 | out: | |
44fbac22 | 1683 | xprt_wake_pending_tasks(xprt, status); |
68e220bd CL |
1684 | out_clear: |
1685 | xprt_clear_connecting(xprt); | |
1686 | } | |
b0d93ad5 | 1687 | |
68e220bd CL |
1688 | /** |
1689 | * xs_tcp_connect_worker6 - connect a TCP socket to a remote endpoint | |
1690 | * @work: RPC transport to connect | |
1691 | * | |
1692 | * Invoked by a work queue tasklet. | |
1693 | */ | |
1694 | static void xs_tcp_connect_worker6(struct work_struct *work) | |
1695 | { | |
1696 | struct sock_xprt *transport = | |
1697 | container_of(work, struct sock_xprt, connect_worker.work); | |
1698 | struct rpc_xprt *xprt = &transport->xprt; | |
1699 | struct socket *sock = transport->sock; | |
1700 | int err, status = -EIO; | |
3167e12c | 1701 | |
68e220bd CL |
1702 | if (xprt->shutdown || !xprt_bound(xprt)) |
1703 | goto out; | |
b0d93ad5 | 1704 | |
68e220bd CL |
1705 | if (!sock) { |
1706 | /* start from scratch */ | |
1707 | if ((err = sock_create_kern(PF_INET6, SOCK_STREAM, IPPROTO_TCP, &sock)) < 0) { | |
1708 | dprintk("RPC: can't create TCP transport socket (%d).\n", -err); | |
1709 | goto out; | |
1710 | } | |
8945ee5e | 1711 | xs_reclassify_socket6(sock); |
b0d93ad5 | 1712 | |
68e220bd CL |
1713 | if (xs_bind6(transport, sock) < 0) { |
1714 | sock_release(sock); | |
1715 | goto out; | |
1716 | } | |
1717 | } else | |
1718 | /* "close" the socket, preserving the local port */ | |
1719 | xs_tcp_reuse_connection(xprt); | |
b0d93ad5 | 1720 | |
68e220bd CL |
1721 | dprintk("RPC: worker connecting xprt %p to address: %s\n", |
1722 | xprt, xprt->address_strings[RPC_DISPLAY_ALL]); | |
b0d93ad5 | 1723 | |
68e220bd | 1724 | status = xs_tcp_finish_connecting(xprt, sock); |
46121cf7 | 1725 | dprintk("RPC: %p connect status %d connected %d sock state %d\n", |
68e220bd | 1726 | xprt, -status, xprt_connected(xprt), sock->sk->sk_state); |
a246b010 CL |
1727 | if (status < 0) { |
1728 | switch (status) { | |
1729 | case -EINPROGRESS: | |
1730 | case -EALREADY: | |
1731 | goto out_clear; | |
3167e12c CL |
1732 | case -ECONNREFUSED: |
1733 | case -ECONNRESET: | |
1734 | /* retry with existing socket, after a delay */ | |
1735 | break; | |
1736 | default: | |
1737 | /* get rid of existing socket, and retry */ | |
e06799f9 | 1738 | xs_tcp_shutdown(xprt); |
a246b010 CL |
1739 | } |
1740 | } | |
1741 | out: | |
44fbac22 | 1742 | xprt_wake_pending_tasks(xprt, status); |
a246b010 | 1743 | out_clear: |
2226feb6 | 1744 | xprt_clear_connecting(xprt); |
a246b010 CL |
1745 | } |
1746 | ||
9903cd1c CL |
1747 | /** |
1748 | * xs_connect - connect a socket to a remote endpoint | |
1749 | * @task: address of RPC task that manages state of connect request | |
1750 | * | |
1751 | * TCP: If the remote end dropped the connection, delay reconnecting. | |
03bf4b70 CL |
1752 | * |
1753 | * UDP socket connects are synchronous, but we use a work queue anyway | |
1754 | * to guarantee that even unprivileged user processes can set up a | |
1755 | * socket on a privileged port. | |
1756 | * | |
1757 | * If a UDP socket connect fails, the delay behavior here prevents | |
1758 | * retry floods (hard mounts). | |
9903cd1c CL |
1759 | */ |
1760 | static void xs_connect(struct rpc_task *task) | |
a246b010 CL |
1761 | { |
1762 | struct rpc_xprt *xprt = task->tk_xprt; | |
ee0ac0c2 | 1763 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
a246b010 | 1764 | |
b0d93ad5 CL |
1765 | if (xprt_test_and_set_connecting(xprt)) |
1766 | return; | |
1767 | ||
ee0ac0c2 | 1768 | if (transport->sock != NULL) { |
46121cf7 CL |
1769 | dprintk("RPC: xs_connect delayed xprt %p for %lu " |
1770 | "seconds\n", | |
03bf4b70 | 1771 | xprt, xprt->reestablish_timeout / HZ); |
c1384c9c TM |
1772 | queue_delayed_work(rpciod_workqueue, |
1773 | &transport->connect_worker, | |
1774 | xprt->reestablish_timeout); | |
03bf4b70 CL |
1775 | xprt->reestablish_timeout <<= 1; |
1776 | if (xprt->reestablish_timeout > XS_TCP_MAX_REEST_TO) | |
1777 | xprt->reestablish_timeout = XS_TCP_MAX_REEST_TO; | |
b0d93ad5 | 1778 | } else { |
46121cf7 | 1779 | dprintk("RPC: xs_connect scheduled xprt %p\n", xprt); |
c1384c9c TM |
1780 | queue_delayed_work(rpciod_workqueue, |
1781 | &transport->connect_worker, 0); | |
a246b010 CL |
1782 | } |
1783 | } | |
1784 | ||
e06799f9 TM |
1785 | static void xs_tcp_connect(struct rpc_task *task) |
1786 | { | |
1787 | struct rpc_xprt *xprt = task->tk_xprt; | |
1788 | ||
1789 | /* Initiate graceful shutdown of the socket if not already done */ | |
1790 | if (test_bit(XPRT_CONNECTED, &xprt->state)) | |
1791 | xs_tcp_shutdown(xprt); | |
1792 | /* Exit if we need to wait for socket shutdown to complete */ | |
1793 | if (test_bit(XPRT_CLOSING, &xprt->state)) | |
1794 | return; | |
1795 | xs_connect(task); | |
1796 | } | |
1797 | ||
262ca07d CL |
1798 | /** |
1799 | * xs_udp_print_stats - display UDP socket-specifc stats | |
1800 | * @xprt: rpc_xprt struct containing statistics | |
1801 | * @seq: output file | |
1802 | * | |
1803 | */ | |
1804 | static void xs_udp_print_stats(struct rpc_xprt *xprt, struct seq_file *seq) | |
1805 | { | |
c8475461 CL |
1806 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
1807 | ||
262ca07d | 1808 | seq_printf(seq, "\txprt:\tudp %u %lu %lu %lu %lu %Lu %Lu\n", |
c8475461 | 1809 | transport->port, |
262ca07d CL |
1810 | xprt->stat.bind_count, |
1811 | xprt->stat.sends, | |
1812 | xprt->stat.recvs, | |
1813 | xprt->stat.bad_xids, | |
1814 | xprt->stat.req_u, | |
1815 | xprt->stat.bklog_u); | |
1816 | } | |
1817 | ||
1818 | /** | |
1819 | * xs_tcp_print_stats - display TCP socket-specifc stats | |
1820 | * @xprt: rpc_xprt struct containing statistics | |
1821 | * @seq: output file | |
1822 | * | |
1823 | */ | |
1824 | static void xs_tcp_print_stats(struct rpc_xprt *xprt, struct seq_file *seq) | |
1825 | { | |
c8475461 | 1826 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
262ca07d CL |
1827 | long idle_time = 0; |
1828 | ||
1829 | if (xprt_connected(xprt)) | |
1830 | idle_time = (long)(jiffies - xprt->last_used) / HZ; | |
1831 | ||
1832 | seq_printf(seq, "\txprt:\ttcp %u %lu %lu %lu %ld %lu %lu %lu %Lu %Lu\n", | |
c8475461 | 1833 | transport->port, |
262ca07d CL |
1834 | xprt->stat.bind_count, |
1835 | xprt->stat.connect_count, | |
1836 | xprt->stat.connect_time, | |
1837 | idle_time, | |
1838 | xprt->stat.sends, | |
1839 | xprt->stat.recvs, | |
1840 | xprt->stat.bad_xids, | |
1841 | xprt->stat.req_u, | |
1842 | xprt->stat.bklog_u); | |
1843 | } | |
1844 | ||
262965f5 | 1845 | static struct rpc_xprt_ops xs_udp_ops = { |
43118c29 | 1846 | .set_buffer_size = xs_udp_set_buffer_size, |
12a80469 | 1847 | .reserve_xprt = xprt_reserve_xprt_cong, |
49e9a890 | 1848 | .release_xprt = xprt_release_xprt_cong, |
45160d62 | 1849 | .rpcbind = rpcb_getport_async, |
92200412 | 1850 | .set_port = xs_set_port, |
262965f5 | 1851 | .connect = xs_connect, |
02107148 CL |
1852 | .buf_alloc = rpc_malloc, |
1853 | .buf_free = rpc_free, | |
262965f5 | 1854 | .send_request = xs_udp_send_request, |
fe3aca29 | 1855 | .set_retrans_timeout = xprt_set_retrans_timeout_rtt, |
46c0ee8b | 1856 | .timer = xs_udp_timer, |
a58dd398 | 1857 | .release_request = xprt_release_rqst_cong, |
262965f5 CL |
1858 | .close = xs_close, |
1859 | .destroy = xs_destroy, | |
262ca07d | 1860 | .print_stats = xs_udp_print_stats, |
262965f5 CL |
1861 | }; |
1862 | ||
1863 | static struct rpc_xprt_ops xs_tcp_ops = { | |
12a80469 | 1864 | .reserve_xprt = xprt_reserve_xprt, |
e0ab53de | 1865 | .release_xprt = xs_tcp_release_xprt, |
45160d62 | 1866 | .rpcbind = rpcb_getport_async, |
92200412 | 1867 | .set_port = xs_set_port, |
e06799f9 | 1868 | .connect = xs_tcp_connect, |
02107148 CL |
1869 | .buf_alloc = rpc_malloc, |
1870 | .buf_free = rpc_free, | |
262965f5 | 1871 | .send_request = xs_tcp_send_request, |
fe3aca29 | 1872 | .set_retrans_timeout = xprt_set_retrans_timeout_def, |
e06799f9 | 1873 | .close = xs_tcp_shutdown, |
9903cd1c | 1874 | .destroy = xs_destroy, |
262ca07d | 1875 | .print_stats = xs_tcp_print_stats, |
a246b010 CL |
1876 | }; |
1877 | ||
3c341b0b | 1878 | static struct rpc_xprt *xs_setup_xprt(struct xprt_create *args, |
bc25571e | 1879 | unsigned int slot_table_size) |
c8541ecd CL |
1880 | { |
1881 | struct rpc_xprt *xprt; | |
ffc2e518 | 1882 | struct sock_xprt *new; |
c8541ecd | 1883 | |
96802a09 | 1884 | if (args->addrlen > sizeof(xprt->addr)) { |
46121cf7 | 1885 | dprintk("RPC: xs_setup_xprt: address too large\n"); |
c8541ecd CL |
1886 | return ERR_PTR(-EBADF); |
1887 | } | |
1888 | ||
ffc2e518 CL |
1889 | new = kzalloc(sizeof(*new), GFP_KERNEL); |
1890 | if (new == NULL) { | |
46121cf7 CL |
1891 | dprintk("RPC: xs_setup_xprt: couldn't allocate " |
1892 | "rpc_xprt\n"); | |
c8541ecd CL |
1893 | return ERR_PTR(-ENOMEM); |
1894 | } | |
ffc2e518 | 1895 | xprt = &new->xprt; |
c8541ecd CL |
1896 | |
1897 | xprt->max_reqs = slot_table_size; | |
1898 | xprt->slot = kcalloc(xprt->max_reqs, sizeof(struct rpc_rqst), GFP_KERNEL); | |
1899 | if (xprt->slot == NULL) { | |
1900 | kfree(xprt); | |
46121cf7 CL |
1901 | dprintk("RPC: xs_setup_xprt: couldn't allocate slot " |
1902 | "table\n"); | |
c8541ecd CL |
1903 | return ERR_PTR(-ENOMEM); |
1904 | } | |
1905 | ||
96802a09 FM |
1906 | memcpy(&xprt->addr, args->dstaddr, args->addrlen); |
1907 | xprt->addrlen = args->addrlen; | |
d3bc9a1d FM |
1908 | if (args->srcaddr) |
1909 | memcpy(&new->addr, args->srcaddr, args->addrlen); | |
c8541ecd CL |
1910 | |
1911 | return xprt; | |
1912 | } | |
1913 | ||
2881ae74 TM |
1914 | static const struct rpc_timeout xs_udp_default_timeout = { |
1915 | .to_initval = 5 * HZ, | |
1916 | .to_maxval = 30 * HZ, | |
1917 | .to_increment = 5 * HZ, | |
1918 | .to_retries = 5, | |
1919 | }; | |
1920 | ||
9903cd1c CL |
1921 | /** |
1922 | * xs_setup_udp - Set up transport to use a UDP socket | |
96802a09 | 1923 | * @args: rpc transport creation arguments |
9903cd1c CL |
1924 | * |
1925 | */ | |
483066d6 | 1926 | static struct rpc_xprt *xs_setup_udp(struct xprt_create *args) |
a246b010 | 1927 | { |
8f9d5b1a | 1928 | struct sockaddr *addr = args->dstaddr; |
c8541ecd | 1929 | struct rpc_xprt *xprt; |
c8475461 | 1930 | struct sock_xprt *transport; |
a246b010 | 1931 | |
96802a09 | 1932 | xprt = xs_setup_xprt(args, xprt_udp_slot_table_entries); |
c8541ecd CL |
1933 | if (IS_ERR(xprt)) |
1934 | return xprt; | |
c8475461 | 1935 | transport = container_of(xprt, struct sock_xprt, xprt); |
a246b010 | 1936 | |
ec739ef0 | 1937 | xprt->prot = IPPROTO_UDP; |
808012fb | 1938 | xprt->tsh_size = 0; |
a246b010 CL |
1939 | /* XXX: header size can vary due to auth type, IPv6, etc. */ |
1940 | xprt->max_payload = (1U << 16) - (MAX_HEADER << 3); | |
1941 | ||
03bf4b70 CL |
1942 | xprt->bind_timeout = XS_BIND_TO; |
1943 | xprt->connect_timeout = XS_UDP_CONN_TO; | |
1944 | xprt->reestablish_timeout = XS_UDP_REEST_TO; | |
1945 | xprt->idle_timeout = XS_IDLE_DISC_TO; | |
a246b010 | 1946 | |
262965f5 | 1947 | xprt->ops = &xs_udp_ops; |
a246b010 | 1948 | |
ba7392bb | 1949 | xprt->timeout = &xs_udp_default_timeout; |
a246b010 | 1950 | |
8f9d5b1a CL |
1951 | switch (addr->sa_family) { |
1952 | case AF_INET: | |
1953 | if (((struct sockaddr_in *)addr)->sin_port != htons(0)) | |
1954 | xprt_set_bound(xprt); | |
1955 | ||
1956 | INIT_DELAYED_WORK(&transport->connect_worker, | |
1957 | xs_udp_connect_worker4); | |
b454ae90 | 1958 | xs_format_ipv4_peer_addresses(xprt, "udp", RPCBIND_NETID_UDP); |
8f9d5b1a CL |
1959 | break; |
1960 | case AF_INET6: | |
1961 | if (((struct sockaddr_in6 *)addr)->sin6_port != htons(0)) | |
1962 | xprt_set_bound(xprt); | |
1963 | ||
1964 | INIT_DELAYED_WORK(&transport->connect_worker, | |
1965 | xs_udp_connect_worker6); | |
b454ae90 | 1966 | xs_format_ipv6_peer_addresses(xprt, "udp", RPCBIND_NETID_UDP6); |
8f9d5b1a CL |
1967 | break; |
1968 | default: | |
1969 | kfree(xprt); | |
1970 | return ERR_PTR(-EAFNOSUPPORT); | |
1971 | } | |
1972 | ||
46121cf7 | 1973 | dprintk("RPC: set up transport to address %s\n", |
7559c7a2 | 1974 | xprt->address_strings[RPC_DISPLAY_ALL]); |
edb267a6 | 1975 | |
bc25571e TT |
1976 | if (try_module_get(THIS_MODULE)) |
1977 | return xprt; | |
1978 | ||
1979 | kfree(xprt->slot); | |
1980 | kfree(xprt); | |
1981 | return ERR_PTR(-EINVAL); | |
a246b010 CL |
1982 | } |
1983 | ||
2881ae74 TM |
1984 | static const struct rpc_timeout xs_tcp_default_timeout = { |
1985 | .to_initval = 60 * HZ, | |
1986 | .to_maxval = 60 * HZ, | |
1987 | .to_retries = 2, | |
1988 | }; | |
1989 | ||
9903cd1c CL |
1990 | /** |
1991 | * xs_setup_tcp - Set up transport to use a TCP socket | |
96802a09 | 1992 | * @args: rpc transport creation arguments |
9903cd1c CL |
1993 | * |
1994 | */ | |
483066d6 | 1995 | static struct rpc_xprt *xs_setup_tcp(struct xprt_create *args) |
a246b010 | 1996 | { |
8f9d5b1a | 1997 | struct sockaddr *addr = args->dstaddr; |
c8541ecd | 1998 | struct rpc_xprt *xprt; |
c8475461 | 1999 | struct sock_xprt *transport; |
a246b010 | 2000 | |
96802a09 | 2001 | xprt = xs_setup_xprt(args, xprt_tcp_slot_table_entries); |
c8541ecd CL |
2002 | if (IS_ERR(xprt)) |
2003 | return xprt; | |
c8475461 | 2004 | transport = container_of(xprt, struct sock_xprt, xprt); |
a246b010 | 2005 | |
ec739ef0 | 2006 | xprt->prot = IPPROTO_TCP; |
808012fb | 2007 | xprt->tsh_size = sizeof(rpc_fraghdr) / sizeof(u32); |
808012fb | 2008 | xprt->max_payload = RPC_MAX_FRAGMENT_SIZE; |
a246b010 | 2009 | |
03bf4b70 CL |
2010 | xprt->bind_timeout = XS_BIND_TO; |
2011 | xprt->connect_timeout = XS_TCP_CONN_TO; | |
2012 | xprt->reestablish_timeout = XS_TCP_INIT_REEST_TO; | |
2013 | xprt->idle_timeout = XS_IDLE_DISC_TO; | |
a246b010 | 2014 | |
262965f5 | 2015 | xprt->ops = &xs_tcp_ops; |
ba7392bb | 2016 | xprt->timeout = &xs_tcp_default_timeout; |
a246b010 | 2017 | |
8f9d5b1a CL |
2018 | switch (addr->sa_family) { |
2019 | case AF_INET: | |
2020 | if (((struct sockaddr_in *)addr)->sin_port != htons(0)) | |
2021 | xprt_set_bound(xprt); | |
2022 | ||
2023 | INIT_DELAYED_WORK(&transport->connect_worker, xs_tcp_connect_worker4); | |
b454ae90 | 2024 | xs_format_ipv4_peer_addresses(xprt, "tcp", RPCBIND_NETID_TCP); |
8f9d5b1a CL |
2025 | break; |
2026 | case AF_INET6: | |
2027 | if (((struct sockaddr_in6 *)addr)->sin6_port != htons(0)) | |
2028 | xprt_set_bound(xprt); | |
2029 | ||
2030 | INIT_DELAYED_WORK(&transport->connect_worker, xs_tcp_connect_worker6); | |
b454ae90 | 2031 | xs_format_ipv6_peer_addresses(xprt, "tcp", RPCBIND_NETID_TCP6); |
8f9d5b1a CL |
2032 | break; |
2033 | default: | |
2034 | kfree(xprt); | |
2035 | return ERR_PTR(-EAFNOSUPPORT); | |
2036 | } | |
2037 | ||
46121cf7 | 2038 | dprintk("RPC: set up transport to address %s\n", |
7559c7a2 | 2039 | xprt->address_strings[RPC_DISPLAY_ALL]); |
edb267a6 | 2040 | |
bc25571e TT |
2041 | if (try_module_get(THIS_MODULE)) |
2042 | return xprt; | |
2043 | ||
2044 | kfree(xprt->slot); | |
2045 | kfree(xprt); | |
2046 | return ERR_PTR(-EINVAL); | |
a246b010 | 2047 | } |
282b32e1 | 2048 | |
bc25571e TT |
2049 | static struct xprt_class xs_udp_transport = { |
2050 | .list = LIST_HEAD_INIT(xs_udp_transport.list), | |
2051 | .name = "udp", | |
2052 | .owner = THIS_MODULE, | |
4fa016eb | 2053 | .ident = IPPROTO_UDP, |
bc25571e TT |
2054 | .setup = xs_setup_udp, |
2055 | }; | |
2056 | ||
2057 | static struct xprt_class xs_tcp_transport = { | |
2058 | .list = LIST_HEAD_INIT(xs_tcp_transport.list), | |
2059 | .name = "tcp", | |
2060 | .owner = THIS_MODULE, | |
4fa016eb | 2061 | .ident = IPPROTO_TCP, |
bc25571e TT |
2062 | .setup = xs_setup_tcp, |
2063 | }; | |
2064 | ||
282b32e1 | 2065 | /** |
bc25571e | 2066 | * init_socket_xprt - set up xprtsock's sysctls, register with RPC client |
282b32e1 CL |
2067 | * |
2068 | */ | |
2069 | int init_socket_xprt(void) | |
2070 | { | |
fbf76683 | 2071 | #ifdef RPC_DEBUG |
2b1bec5f | 2072 | if (!sunrpc_table_header) |
0b4d4147 | 2073 | sunrpc_table_header = register_sysctl_table(sunrpc_table); |
fbf76683 CL |
2074 | #endif |
2075 | ||
bc25571e TT |
2076 | xprt_register_transport(&xs_udp_transport); |
2077 | xprt_register_transport(&xs_tcp_transport); | |
2078 | ||
282b32e1 CL |
2079 | return 0; |
2080 | } | |
2081 | ||
2082 | /** | |
bc25571e | 2083 | * cleanup_socket_xprt - remove xprtsock's sysctls, unregister |
282b32e1 CL |
2084 | * |
2085 | */ | |
2086 | void cleanup_socket_xprt(void) | |
2087 | { | |
fbf76683 CL |
2088 | #ifdef RPC_DEBUG |
2089 | if (sunrpc_table_header) { | |
2090 | unregister_sysctl_table(sunrpc_table_header); | |
2091 | sunrpc_table_header = NULL; | |
2092 | } | |
2093 | #endif | |
bc25571e TT |
2094 | |
2095 | xprt_unregister_transport(&xs_udp_transport); | |
2096 | xprt_unregister_transport(&xs_tcp_transport); | |
282b32e1 | 2097 | } |