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 | ||
ba10f2c2 | 283 | static void xs_format_ipv4_peer_addresses(struct rpc_xprt *xprt) |
edb267a6 | 284 | { |
95392c59 | 285 | struct sockaddr_in *addr = xs_addr_in(xprt); |
edb267a6 CL |
286 | char *buf; |
287 | ||
288 | buf = kzalloc(20, GFP_KERNEL); | |
289 | if (buf) { | |
bda243df | 290 | snprintf(buf, 20, NIPQUAD_FMT, |
edb267a6 CL |
291 | NIPQUAD(addr->sin_addr.s_addr)); |
292 | } | |
293 | xprt->address_strings[RPC_DISPLAY_ADDR] = buf; | |
294 | ||
295 | buf = kzalloc(8, GFP_KERNEL); | |
296 | if (buf) { | |
297 | snprintf(buf, 8, "%u", | |
298 | ntohs(addr->sin_port)); | |
299 | } | |
300 | xprt->address_strings[RPC_DISPLAY_PORT] = buf; | |
301 | ||
0c43b3d8 CL |
302 | buf = kzalloc(8, GFP_KERNEL); |
303 | if (buf) { | |
304 | if (xprt->prot == IPPROTO_UDP) | |
305 | snprintf(buf, 8, "udp"); | |
306 | else | |
307 | snprintf(buf, 8, "tcp"); | |
308 | } | |
309 | xprt->address_strings[RPC_DISPLAY_PROTO] = buf; | |
edb267a6 CL |
310 | |
311 | buf = kzalloc(48, GFP_KERNEL); | |
312 | if (buf) { | |
bda243df | 313 | snprintf(buf, 48, "addr="NIPQUAD_FMT" port=%u proto=%s", |
edb267a6 CL |
314 | NIPQUAD(addr->sin_addr.s_addr), |
315 | ntohs(addr->sin_port), | |
316 | xprt->prot == IPPROTO_UDP ? "udp" : "tcp"); | |
317 | } | |
318 | xprt->address_strings[RPC_DISPLAY_ALL] = buf; | |
fbfe3cc6 CL |
319 | |
320 | buf = kzalloc(10, GFP_KERNEL); | |
321 | if (buf) { | |
322 | snprintf(buf, 10, "%02x%02x%02x%02x", | |
323 | NIPQUAD(addr->sin_addr.s_addr)); | |
324 | } | |
325 | xprt->address_strings[RPC_DISPLAY_HEX_ADDR] = buf; | |
326 | ||
327 | buf = kzalloc(8, GFP_KERNEL); | |
328 | if (buf) { | |
329 | snprintf(buf, 8, "%4hx", | |
330 | ntohs(addr->sin_port)); | |
331 | } | |
332 | xprt->address_strings[RPC_DISPLAY_HEX_PORT] = buf; | |
756805e7 CL |
333 | |
334 | buf = kzalloc(30, GFP_KERNEL); | |
335 | if (buf) { | |
336 | snprintf(buf, 30, NIPQUAD_FMT".%u.%u", | |
337 | NIPQUAD(addr->sin_addr.s_addr), | |
338 | ntohs(addr->sin_port) >> 8, | |
339 | ntohs(addr->sin_port) & 0xff); | |
340 | } | |
341 | xprt->address_strings[RPC_DISPLAY_UNIVERSAL_ADDR] = buf; | |
4417c8c4 TT |
342 | |
343 | xprt->address_strings[RPC_DISPLAY_NETID] = | |
344 | kstrdup(xprt->prot == IPPROTO_UDP ? | |
345 | RPCBIND_NETID_UDP : RPCBIND_NETID_TCP, GFP_KERNEL); | |
edb267a6 CL |
346 | } |
347 | ||
4b6473fb CL |
348 | static void xs_format_ipv6_peer_addresses(struct rpc_xprt *xprt) |
349 | { | |
95392c59 | 350 | struct sockaddr_in6 *addr = xs_addr_in6(xprt); |
4b6473fb CL |
351 | char *buf; |
352 | ||
353 | buf = kzalloc(40, GFP_KERNEL); | |
354 | if (buf) { | |
355 | snprintf(buf, 40, NIP6_FMT, | |
356 | NIP6(addr->sin6_addr)); | |
357 | } | |
358 | xprt->address_strings[RPC_DISPLAY_ADDR] = buf; | |
359 | ||
360 | buf = kzalloc(8, GFP_KERNEL); | |
361 | if (buf) { | |
362 | snprintf(buf, 8, "%u", | |
363 | ntohs(addr->sin6_port)); | |
364 | } | |
365 | xprt->address_strings[RPC_DISPLAY_PORT] = buf; | |
366 | ||
367 | buf = kzalloc(8, GFP_KERNEL); | |
368 | if (buf) { | |
369 | if (xprt->prot == IPPROTO_UDP) | |
370 | snprintf(buf, 8, "udp"); | |
371 | else | |
372 | snprintf(buf, 8, "tcp"); | |
373 | } | |
374 | xprt->address_strings[RPC_DISPLAY_PROTO] = buf; | |
375 | ||
376 | buf = kzalloc(64, GFP_KERNEL); | |
377 | if (buf) { | |
378 | snprintf(buf, 64, "addr="NIP6_FMT" port=%u proto=%s", | |
379 | NIP6(addr->sin6_addr), | |
380 | ntohs(addr->sin6_port), | |
381 | xprt->prot == IPPROTO_UDP ? "udp" : "tcp"); | |
382 | } | |
383 | xprt->address_strings[RPC_DISPLAY_ALL] = buf; | |
384 | ||
385 | buf = kzalloc(36, GFP_KERNEL); | |
386 | if (buf) { | |
387 | snprintf(buf, 36, NIP6_SEQFMT, | |
388 | NIP6(addr->sin6_addr)); | |
389 | } | |
390 | xprt->address_strings[RPC_DISPLAY_HEX_ADDR] = buf; | |
391 | ||
392 | buf = kzalloc(8, GFP_KERNEL); | |
393 | if (buf) { | |
394 | snprintf(buf, 8, "%4hx", | |
395 | ntohs(addr->sin6_port)); | |
396 | } | |
397 | xprt->address_strings[RPC_DISPLAY_HEX_PORT] = buf; | |
756805e7 CL |
398 | |
399 | buf = kzalloc(50, GFP_KERNEL); | |
400 | if (buf) { | |
401 | snprintf(buf, 50, NIP6_FMT".%u.%u", | |
402 | NIP6(addr->sin6_addr), | |
403 | ntohs(addr->sin6_port) >> 8, | |
404 | ntohs(addr->sin6_port) & 0xff); | |
405 | } | |
406 | xprt->address_strings[RPC_DISPLAY_UNIVERSAL_ADDR] = buf; | |
4417c8c4 TT |
407 | |
408 | xprt->address_strings[RPC_DISPLAY_NETID] = | |
409 | kstrdup(xprt->prot == IPPROTO_UDP ? | |
410 | RPCBIND_NETID_UDP6 : RPCBIND_NETID_TCP6, GFP_KERNEL); | |
edb267a6 CL |
411 | } |
412 | ||
413 | static void xs_free_peer_addresses(struct rpc_xprt *xprt) | |
414 | { | |
0c43b3d8 CL |
415 | int i; |
416 | ||
417 | for (i = 0; i < RPC_DISPLAY_MAX; i++) | |
418 | kfree(xprt->address_strings[i]); | |
edb267a6 CL |
419 | } |
420 | ||
b4b5cc85 CL |
421 | #define XS_SENDMSG_FLAGS (MSG_DONTWAIT | MSG_NOSIGNAL) |
422 | ||
24c5684b | 423 | static int xs_send_kvec(struct socket *sock, struct sockaddr *addr, int addrlen, struct kvec *vec, unsigned int base, int more) |
b4b5cc85 | 424 | { |
b4b5cc85 CL |
425 | struct msghdr msg = { |
426 | .msg_name = addr, | |
427 | .msg_namelen = addrlen, | |
24c5684b TM |
428 | .msg_flags = XS_SENDMSG_FLAGS | (more ? MSG_MORE : 0), |
429 | }; | |
430 | struct kvec iov = { | |
431 | .iov_base = vec->iov_base + base, | |
432 | .iov_len = vec->iov_len - base, | |
b4b5cc85 CL |
433 | }; |
434 | ||
24c5684b | 435 | if (iov.iov_len != 0) |
b4b5cc85 CL |
436 | return kernel_sendmsg(sock, &msg, &iov, 1, iov.iov_len); |
437 | return kernel_sendmsg(sock, &msg, NULL, 0, 0); | |
438 | } | |
439 | ||
24c5684b | 440 | static int xs_send_pagedata(struct socket *sock, struct xdr_buf *xdr, unsigned int base, int more) |
b4b5cc85 | 441 | { |
24c5684b TM |
442 | struct page **ppage; |
443 | unsigned int remainder; | |
444 | int err, sent = 0; | |
445 | ||
446 | remainder = xdr->page_len - base; | |
447 | base += xdr->page_base; | |
448 | ppage = xdr->pages + (base >> PAGE_SHIFT); | |
449 | base &= ~PAGE_MASK; | |
450 | for(;;) { | |
451 | unsigned int len = min_t(unsigned int, PAGE_SIZE - base, remainder); | |
452 | int flags = XS_SENDMSG_FLAGS; | |
b4b5cc85 | 453 | |
24c5684b TM |
454 | remainder -= len; |
455 | if (remainder != 0 || more) | |
456 | flags |= MSG_MORE; | |
457 | err = sock->ops->sendpage(sock, *ppage, base, len, flags); | |
458 | if (remainder == 0 || err != len) | |
459 | break; | |
460 | sent += err; | |
461 | ppage++; | |
462 | base = 0; | |
463 | } | |
464 | if (sent == 0) | |
465 | return err; | |
466 | if (err > 0) | |
467 | sent += err; | |
468 | return sent; | |
b4b5cc85 CL |
469 | } |
470 | ||
9903cd1c CL |
471 | /** |
472 | * xs_sendpages - write pages directly to a socket | |
473 | * @sock: socket to send on | |
474 | * @addr: UDP only -- address of destination | |
475 | * @addrlen: UDP only -- length of destination address | |
476 | * @xdr: buffer containing this request | |
477 | * @base: starting position in the buffer | |
478 | * | |
a246b010 | 479 | */ |
24c5684b | 480 | static int xs_sendpages(struct socket *sock, struct sockaddr *addr, int addrlen, struct xdr_buf *xdr, unsigned int base) |
a246b010 | 481 | { |
24c5684b TM |
482 | unsigned int remainder = xdr->len - base; |
483 | int err, sent = 0; | |
a246b010 | 484 | |
262965f5 CL |
485 | if (unlikely(!sock)) |
486 | return -ENOTCONN; | |
487 | ||
488 | clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags); | |
24c5684b TM |
489 | if (base != 0) { |
490 | addr = NULL; | |
491 | addrlen = 0; | |
492 | } | |
262965f5 | 493 | |
24c5684b TM |
494 | if (base < xdr->head[0].iov_len || addr != NULL) { |
495 | unsigned int len = xdr->head[0].iov_len - base; | |
496 | remainder -= len; | |
497 | err = xs_send_kvec(sock, addr, addrlen, &xdr->head[0], base, remainder != 0); | |
498 | if (remainder == 0 || err != len) | |
a246b010 | 499 | goto out; |
24c5684b | 500 | sent += err; |
a246b010 CL |
501 | base = 0; |
502 | } else | |
24c5684b | 503 | base -= xdr->head[0].iov_len; |
a246b010 | 504 | |
24c5684b TM |
505 | if (base < xdr->page_len) { |
506 | unsigned int len = xdr->page_len - base; | |
507 | remainder -= len; | |
508 | err = xs_send_pagedata(sock, xdr, base, remainder != 0); | |
509 | if (remainder == 0 || err != len) | |
a246b010 | 510 | goto out; |
24c5684b | 511 | sent += err; |
a246b010 | 512 | base = 0; |
24c5684b TM |
513 | } else |
514 | base -= xdr->page_len; | |
515 | ||
516 | if (base >= xdr->tail[0].iov_len) | |
517 | return sent; | |
518 | err = xs_send_kvec(sock, NULL, 0, &xdr->tail[0], base, 0); | |
a246b010 | 519 | out: |
24c5684b TM |
520 | if (sent == 0) |
521 | return err; | |
522 | if (err > 0) | |
523 | sent += err; | |
524 | return sent; | |
a246b010 CL |
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 | ||
ee0ac0c2 | 542 | if (test_bit(SOCK_ASYNC_NOSPACE, &transport->sock->flags)) { |
262965f5 CL |
543 | /* Protect against races with write_space */ |
544 | spin_lock_bh(&xprt->transport_lock); | |
545 | ||
546 | /* Don't race with disconnect */ | |
547 | if (!xprt_connected(xprt)) | |
548 | task->tk_status = -ENOTCONN; | |
ee0ac0c2 | 549 | else if (test_bit(SOCK_NOSPACE, &transport->sock->flags)) |
262965f5 CL |
550 | xprt_wait_for_buffer_space(task); |
551 | ||
552 | spin_unlock_bh(&xprt->transport_lock); | |
553 | } else | |
554 | /* Keep holding the socket if it is blocked */ | |
555 | rpc_delay(task, HZ>>4); | |
556 | } | |
557 | ||
558 | /** | |
559 | * xs_udp_send_request - write an RPC request to a UDP socket | |
560 | * @task: address of RPC task that manages the state of an RPC request | |
561 | * | |
562 | * Return values: | |
563 | * 0: The request has been sent | |
564 | * EAGAIN: The socket was blocked, please call again later to | |
565 | * complete the request | |
566 | * ENOTCONN: Caller needs to invoke connect logic then call again | |
567 | * other: Some other error occured, the request was not sent | |
568 | */ | |
569 | static int xs_udp_send_request(struct rpc_task *task) | |
570 | { | |
571 | struct rpc_rqst *req = task->tk_rqstp; | |
572 | struct rpc_xprt *xprt = req->rq_xprt; | |
ee0ac0c2 | 573 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
262965f5 CL |
574 | struct xdr_buf *xdr = &req->rq_snd_buf; |
575 | int status; | |
a246b010 | 576 | |
9903cd1c | 577 | xs_pktdump("packet data:", |
a246b010 CL |
578 | req->rq_svec->iov_base, |
579 | req->rq_svec->iov_len); | |
580 | ||
262965f5 | 581 | req->rq_xtime = jiffies; |
ee0ac0c2 | 582 | status = xs_sendpages(transport->sock, |
95392c59 | 583 | xs_addr(xprt), |
ee0ac0c2 CL |
584 | xprt->addrlen, xdr, |
585 | req->rq_bytes_sent); | |
a246b010 | 586 | |
46121cf7 | 587 | dprintk("RPC: xs_udp_send_request(%u) = %d\n", |
262965f5 | 588 | xdr->len - req->rq_bytes_sent, status); |
a246b010 | 589 | |
2199700f TM |
590 | if (status >= 0) { |
591 | task->tk_bytes_sent += status; | |
592 | if (status >= req->rq_slen) | |
593 | return 0; | |
594 | /* Still some bytes left; set up for a retry later. */ | |
262965f5 | 595 | status = -EAGAIN; |
2199700f | 596 | } |
a246b010 | 597 | |
262965f5 CL |
598 | switch (status) { |
599 | case -ENETUNREACH: | |
600 | case -EPIPE: | |
a246b010 CL |
601 | case -ECONNREFUSED: |
602 | /* When the server has died, an ICMP port unreachable message | |
9903cd1c | 603 | * prompts ECONNREFUSED. */ |
a246b010 | 604 | break; |
262965f5 CL |
605 | case -EAGAIN: |
606 | xs_nospace(task); | |
a246b010 CL |
607 | break; |
608 | default: | |
46121cf7 | 609 | dprintk("RPC: sendmsg returned unrecognized error %d\n", |
262965f5 | 610 | -status); |
9903cd1c | 611 | break; |
a246b010 | 612 | } |
262965f5 CL |
613 | |
614 | return status; | |
a246b010 CL |
615 | } |
616 | ||
e06799f9 TM |
617 | /** |
618 | * xs_tcp_shutdown - gracefully shut down a TCP socket | |
619 | * @xprt: transport | |
620 | * | |
621 | * Initiates a graceful shutdown of the TCP socket by calling the | |
622 | * equivalent of shutdown(SHUT_WR); | |
623 | */ | |
624 | static void xs_tcp_shutdown(struct rpc_xprt *xprt) | |
625 | { | |
626 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); | |
627 | struct socket *sock = transport->sock; | |
628 | ||
629 | if (sock != NULL) | |
630 | kernel_sock_shutdown(sock, SHUT_WR); | |
631 | } | |
632 | ||
808012fb CL |
633 | static inline void xs_encode_tcp_record_marker(struct xdr_buf *buf) |
634 | { | |
635 | u32 reclen = buf->len - sizeof(rpc_fraghdr); | |
636 | rpc_fraghdr *base = buf->head[0].iov_base; | |
637 | *base = htonl(RPC_LAST_STREAM_FRAGMENT | reclen); | |
638 | } | |
639 | ||
9903cd1c | 640 | /** |
262965f5 | 641 | * xs_tcp_send_request - write an RPC request to a TCP socket |
9903cd1c CL |
642 | * @task: address of RPC task that manages the state of an RPC request |
643 | * | |
644 | * Return values: | |
262965f5 CL |
645 | * 0: The request has been sent |
646 | * EAGAIN: The socket was blocked, please call again later to | |
647 | * complete the request | |
648 | * ENOTCONN: Caller needs to invoke connect logic then call again | |
649 | * other: Some other error occured, the request was not sent | |
9903cd1c CL |
650 | * |
651 | * XXX: In the case of soft timeouts, should we eventually give up | |
262965f5 | 652 | * if sendmsg is not able to make progress? |
9903cd1c | 653 | */ |
262965f5 | 654 | static int xs_tcp_send_request(struct rpc_task *task) |
a246b010 CL |
655 | { |
656 | struct rpc_rqst *req = task->tk_rqstp; | |
657 | struct rpc_xprt *xprt = req->rq_xprt; | |
ee0ac0c2 | 658 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
262965f5 | 659 | struct xdr_buf *xdr = &req->rq_snd_buf; |
b595bb15 CL |
660 | int status; |
661 | unsigned int retry = 0; | |
a246b010 | 662 | |
808012fb | 663 | xs_encode_tcp_record_marker(&req->rq_snd_buf); |
a246b010 | 664 | |
262965f5 CL |
665 | xs_pktdump("packet data:", |
666 | req->rq_svec->iov_base, | |
667 | req->rq_svec->iov_len); | |
a246b010 CL |
668 | |
669 | /* Continue transmitting the packet/record. We must be careful | |
670 | * to cope with writespace callbacks arriving _after_ we have | |
262965f5 | 671 | * called sendmsg(). */ |
a246b010 CL |
672 | while (1) { |
673 | req->rq_xtime = jiffies; | |
ee0ac0c2 CL |
674 | status = xs_sendpages(transport->sock, |
675 | NULL, 0, xdr, req->rq_bytes_sent); | |
a246b010 | 676 | |
46121cf7 | 677 | dprintk("RPC: xs_tcp_send_request(%u) = %d\n", |
262965f5 | 678 | xdr->len - req->rq_bytes_sent, status); |
a246b010 | 679 | |
262965f5 | 680 | if (unlikely(status < 0)) |
a246b010 | 681 | break; |
a246b010 | 682 | |
262965f5 CL |
683 | /* If we've sent the entire packet, immediately |
684 | * reset the count of bytes sent. */ | |
685 | req->rq_bytes_sent += status; | |
ef759a2e | 686 | task->tk_bytes_sent += status; |
262965f5 CL |
687 | if (likely(req->rq_bytes_sent >= req->rq_slen)) { |
688 | req->rq_bytes_sent = 0; | |
689 | return 0; | |
690 | } | |
a246b010 CL |
691 | |
692 | status = -EAGAIN; | |
262965f5 | 693 | if (retry++ > XS_SENDMSG_RETRY) |
a246b010 CL |
694 | break; |
695 | } | |
696 | ||
262965f5 CL |
697 | switch (status) { |
698 | case -EAGAIN: | |
699 | xs_nospace(task); | |
700 | break; | |
701 | case -ECONNREFUSED: | |
702 | case -ECONNRESET: | |
703 | case -ENOTCONN: | |
704 | case -EPIPE: | |
705 | status = -ENOTCONN; | |
706 | break; | |
707 | default: | |
46121cf7 | 708 | dprintk("RPC: sendmsg returned unrecognized error %d\n", |
262965f5 | 709 | -status); |
e06799f9 | 710 | xs_tcp_shutdown(xprt); |
262965f5 | 711 | break; |
a246b010 | 712 | } |
262965f5 | 713 | |
a246b010 CL |
714 | return status; |
715 | } | |
716 | ||
e0ab53de TM |
717 | /** |
718 | * xs_tcp_release_xprt - clean up after a tcp transmission | |
719 | * @xprt: transport | |
720 | * @task: rpc task | |
721 | * | |
722 | * This cleans up if an error causes us to abort the transmission of a request. | |
723 | * In this case, the socket may need to be reset in order to avoid confusing | |
724 | * the server. | |
725 | */ | |
726 | static void xs_tcp_release_xprt(struct rpc_xprt *xprt, struct rpc_task *task) | |
727 | { | |
728 | struct rpc_rqst *req; | |
729 | ||
730 | if (task != xprt->snd_task) | |
731 | return; | |
732 | if (task == NULL) | |
733 | goto out_release; | |
734 | req = task->tk_rqstp; | |
735 | if (req->rq_bytes_sent == 0) | |
736 | goto out_release; | |
737 | if (req->rq_bytes_sent == req->rq_snd_buf.len) | |
738 | goto out_release; | |
739 | set_bit(XPRT_CLOSE_WAIT, &task->tk_xprt->state); | |
740 | out_release: | |
741 | xprt_release_xprt(xprt, task); | |
742 | } | |
743 | ||
9903cd1c CL |
744 | /** |
745 | * xs_close - close a socket | |
746 | * @xprt: transport | |
747 | * | |
3167e12c CL |
748 | * This is used when all requests are complete; ie, no DRC state remains |
749 | * on the server we want to save. | |
a246b010 | 750 | */ |
9903cd1c | 751 | static void xs_close(struct rpc_xprt *xprt) |
a246b010 | 752 | { |
ee0ac0c2 CL |
753 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
754 | struct socket *sock = transport->sock; | |
755 | struct sock *sk = transport->inet; | |
a246b010 CL |
756 | |
757 | if (!sk) | |
632e3bdc | 758 | goto clear_close_wait; |
a246b010 | 759 | |
46121cf7 | 760 | dprintk("RPC: xs_close xprt %p\n", xprt); |
9903cd1c | 761 | |
a246b010 | 762 | write_lock_bh(&sk->sk_callback_lock); |
ee0ac0c2 CL |
763 | transport->inet = NULL; |
764 | transport->sock = NULL; | |
a246b010 | 765 | |
9903cd1c | 766 | sk->sk_user_data = NULL; |
314dfd79 CL |
767 | sk->sk_data_ready = transport->old_data_ready; |
768 | sk->sk_state_change = transport->old_state_change; | |
769 | sk->sk_write_space = transport->old_write_space; | |
a246b010 CL |
770 | write_unlock_bh(&sk->sk_callback_lock); |
771 | ||
9903cd1c | 772 | sk->sk_no_check = 0; |
a246b010 CL |
773 | |
774 | sock_release(sock); | |
632e3bdc TM |
775 | clear_close_wait: |
776 | smp_mb__before_clear_bit(); | |
777 | clear_bit(XPRT_CLOSE_WAIT, &xprt->state); | |
3b948ae5 | 778 | clear_bit(XPRT_CLOSING, &xprt->state); |
632e3bdc | 779 | smp_mb__after_clear_bit(); |
62da3b24 | 780 | xprt_disconnect_done(xprt); |
a246b010 CL |
781 | } |
782 | ||
9903cd1c CL |
783 | /** |
784 | * xs_destroy - prepare to shutdown a transport | |
785 | * @xprt: doomed transport | |
786 | * | |
787 | */ | |
788 | static void xs_destroy(struct rpc_xprt *xprt) | |
a246b010 | 789 | { |
c8475461 CL |
790 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
791 | ||
46121cf7 | 792 | dprintk("RPC: xs_destroy xprt %p\n", xprt); |
9903cd1c | 793 | |
c1384c9c | 794 | cancel_rearming_delayed_work(&transport->connect_worker); |
a246b010 | 795 | |
9903cd1c | 796 | xs_close(xprt); |
edb267a6 | 797 | xs_free_peer_addresses(xprt); |
a246b010 | 798 | kfree(xprt->slot); |
c8541ecd | 799 | kfree(xprt); |
bc25571e | 800 | module_put(THIS_MODULE); |
a246b010 CL |
801 | } |
802 | ||
9903cd1c CL |
803 | static inline struct rpc_xprt *xprt_from_sock(struct sock *sk) |
804 | { | |
805 | return (struct rpc_xprt *) sk->sk_user_data; | |
806 | } | |
807 | ||
808 | /** | |
809 | * xs_udp_data_ready - "data ready" callback for UDP sockets | |
810 | * @sk: socket with data to read | |
811 | * @len: how much data to read | |
812 | * | |
a246b010 | 813 | */ |
9903cd1c | 814 | static void xs_udp_data_ready(struct sock *sk, int len) |
a246b010 | 815 | { |
9903cd1c CL |
816 | struct rpc_task *task; |
817 | struct rpc_xprt *xprt; | |
a246b010 | 818 | struct rpc_rqst *rovr; |
9903cd1c | 819 | struct sk_buff *skb; |
a246b010 | 820 | int err, repsize, copied; |
d8ed029d AD |
821 | u32 _xid; |
822 | __be32 *xp; | |
a246b010 CL |
823 | |
824 | read_lock(&sk->sk_callback_lock); | |
46121cf7 | 825 | dprintk("RPC: xs_udp_data_ready...\n"); |
9903cd1c | 826 | if (!(xprt = xprt_from_sock(sk))) |
a246b010 | 827 | goto out; |
a246b010 CL |
828 | |
829 | if ((skb = skb_recv_datagram(sk, 0, 1, &err)) == NULL) | |
830 | goto out; | |
831 | ||
832 | if (xprt->shutdown) | |
833 | goto dropit; | |
834 | ||
835 | repsize = skb->len - sizeof(struct udphdr); | |
836 | if (repsize < 4) { | |
46121cf7 | 837 | dprintk("RPC: impossible RPC reply size %d!\n", repsize); |
a246b010 CL |
838 | goto dropit; |
839 | } | |
840 | ||
841 | /* Copy the XID from the skb... */ | |
842 | xp = skb_header_pointer(skb, sizeof(struct udphdr), | |
843 | sizeof(_xid), &_xid); | |
844 | if (xp == NULL) | |
845 | goto dropit; | |
846 | ||
847 | /* Look up and lock the request corresponding to the given XID */ | |
4a0f8c04 | 848 | spin_lock(&xprt->transport_lock); |
a246b010 CL |
849 | rovr = xprt_lookup_rqst(xprt, *xp); |
850 | if (!rovr) | |
851 | goto out_unlock; | |
852 | task = rovr->rq_task; | |
853 | ||
a246b010 CL |
854 | if ((copied = rovr->rq_private_buf.buflen) > repsize) |
855 | copied = repsize; | |
856 | ||
857 | /* Suck it into the iovec, verify checksum if not done by hw. */ | |
1781f7f5 HX |
858 | if (csum_partial_copy_to_xdr(&rovr->rq_private_buf, skb)) { |
859 | UDPX_INC_STATS_BH(sk, UDP_MIB_INERRORS); | |
a246b010 | 860 | goto out_unlock; |
1781f7f5 HX |
861 | } |
862 | ||
863 | UDPX_INC_STATS_BH(sk, UDP_MIB_INDATAGRAMS); | |
a246b010 CL |
864 | |
865 | /* Something worked... */ | |
866 | dst_confirm(skb->dst); | |
867 | ||
1570c1e4 CL |
868 | xprt_adjust_cwnd(task, copied); |
869 | xprt_update_rtt(task); | |
870 | xprt_complete_rqst(task, copied); | |
a246b010 CL |
871 | |
872 | out_unlock: | |
4a0f8c04 | 873 | spin_unlock(&xprt->transport_lock); |
a246b010 CL |
874 | dropit: |
875 | skb_free_datagram(sk, skb); | |
876 | out: | |
877 | read_unlock(&sk->sk_callback_lock); | |
878 | } | |
879 | ||
dd456471 | 880 | static inline void xs_tcp_read_fraghdr(struct rpc_xprt *xprt, struct xdr_skb_reader *desc) |
a246b010 | 881 | { |
51971139 | 882 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
a246b010 CL |
883 | size_t len, used; |
884 | char *p; | |
885 | ||
51971139 CL |
886 | p = ((char *) &transport->tcp_fraghdr) + transport->tcp_offset; |
887 | len = sizeof(transport->tcp_fraghdr) - transport->tcp_offset; | |
9d292316 | 888 | used = xdr_skb_read_bits(desc, p, len); |
51971139 | 889 | transport->tcp_offset += used; |
a246b010 CL |
890 | if (used != len) |
891 | return; | |
808012fb | 892 | |
51971139 CL |
893 | transport->tcp_reclen = ntohl(transport->tcp_fraghdr); |
894 | if (transport->tcp_reclen & RPC_LAST_STREAM_FRAGMENT) | |
e136d092 | 895 | transport->tcp_flags |= TCP_RCV_LAST_FRAG; |
a246b010 | 896 | else |
e136d092 | 897 | transport->tcp_flags &= ~TCP_RCV_LAST_FRAG; |
51971139 | 898 | transport->tcp_reclen &= RPC_FRAGMENT_SIZE_MASK; |
808012fb | 899 | |
e136d092 | 900 | transport->tcp_flags &= ~TCP_RCV_COPY_FRAGHDR; |
51971139 | 901 | transport->tcp_offset = 0; |
808012fb | 902 | |
a246b010 | 903 | /* Sanity check of the record length */ |
51971139 | 904 | if (unlikely(transport->tcp_reclen < 4)) { |
46121cf7 | 905 | dprintk("RPC: invalid TCP record fragment length\n"); |
3ebb067d | 906 | xprt_force_disconnect(xprt); |
9903cd1c | 907 | return; |
a246b010 | 908 | } |
46121cf7 | 909 | dprintk("RPC: reading TCP record fragment of length %d\n", |
51971139 | 910 | transport->tcp_reclen); |
a246b010 CL |
911 | } |
912 | ||
51971139 | 913 | static void xs_tcp_check_fraghdr(struct sock_xprt *transport) |
a246b010 | 914 | { |
51971139 | 915 | if (transport->tcp_offset == transport->tcp_reclen) { |
e136d092 | 916 | transport->tcp_flags |= TCP_RCV_COPY_FRAGHDR; |
51971139 | 917 | transport->tcp_offset = 0; |
e136d092 CL |
918 | if (transport->tcp_flags & TCP_RCV_LAST_FRAG) { |
919 | transport->tcp_flags &= ~TCP_RCV_COPY_DATA; | |
920 | transport->tcp_flags |= TCP_RCV_COPY_XID; | |
51971139 | 921 | transport->tcp_copied = 0; |
a246b010 CL |
922 | } |
923 | } | |
924 | } | |
925 | ||
dd456471 | 926 | static inline void xs_tcp_read_xid(struct sock_xprt *transport, struct xdr_skb_reader *desc) |
a246b010 CL |
927 | { |
928 | size_t len, used; | |
929 | char *p; | |
930 | ||
51971139 | 931 | len = sizeof(transport->tcp_xid) - transport->tcp_offset; |
46121cf7 | 932 | dprintk("RPC: reading XID (%Zu bytes)\n", len); |
51971139 | 933 | p = ((char *) &transport->tcp_xid) + transport->tcp_offset; |
9d292316 | 934 | used = xdr_skb_read_bits(desc, p, len); |
51971139 | 935 | transport->tcp_offset += used; |
a246b010 CL |
936 | if (used != len) |
937 | return; | |
e136d092 CL |
938 | transport->tcp_flags &= ~TCP_RCV_COPY_XID; |
939 | transport->tcp_flags |= TCP_RCV_COPY_DATA; | |
51971139 | 940 | transport->tcp_copied = 4; |
46121cf7 | 941 | dprintk("RPC: reading reply for XID %08x\n", |
51971139 CL |
942 | ntohl(transport->tcp_xid)); |
943 | xs_tcp_check_fraghdr(transport); | |
a246b010 CL |
944 | } |
945 | ||
dd456471 | 946 | static inline void xs_tcp_read_request(struct rpc_xprt *xprt, struct xdr_skb_reader *desc) |
a246b010 | 947 | { |
51971139 | 948 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
a246b010 CL |
949 | struct rpc_rqst *req; |
950 | struct xdr_buf *rcvbuf; | |
951 | size_t len; | |
952 | ssize_t r; | |
953 | ||
954 | /* Find and lock the request corresponding to this xid */ | |
4a0f8c04 | 955 | spin_lock(&xprt->transport_lock); |
51971139 | 956 | req = xprt_lookup_rqst(xprt, transport->tcp_xid); |
a246b010 | 957 | if (!req) { |
e136d092 | 958 | transport->tcp_flags &= ~TCP_RCV_COPY_DATA; |
46121cf7 | 959 | dprintk("RPC: XID %08x request not found!\n", |
51971139 | 960 | ntohl(transport->tcp_xid)); |
4a0f8c04 | 961 | spin_unlock(&xprt->transport_lock); |
a246b010 CL |
962 | return; |
963 | } | |
964 | ||
965 | rcvbuf = &req->rq_private_buf; | |
966 | len = desc->count; | |
51971139 | 967 | if (len > transport->tcp_reclen - transport->tcp_offset) { |
dd456471 | 968 | struct xdr_skb_reader my_desc; |
a246b010 | 969 | |
51971139 | 970 | len = transport->tcp_reclen - transport->tcp_offset; |
a246b010 CL |
971 | memcpy(&my_desc, desc, sizeof(my_desc)); |
972 | my_desc.count = len; | |
51971139 | 973 | r = xdr_partial_copy_from_skb(rcvbuf, transport->tcp_copied, |
9d292316 | 974 | &my_desc, xdr_skb_read_bits); |
a246b010 CL |
975 | desc->count -= r; |
976 | desc->offset += r; | |
977 | } else | |
51971139 | 978 | r = xdr_partial_copy_from_skb(rcvbuf, transport->tcp_copied, |
9d292316 | 979 | desc, xdr_skb_read_bits); |
a246b010 CL |
980 | |
981 | if (r > 0) { | |
51971139 CL |
982 | transport->tcp_copied += r; |
983 | transport->tcp_offset += r; | |
a246b010 CL |
984 | } |
985 | if (r != len) { | |
986 | /* Error when copying to the receive buffer, | |
987 | * usually because we weren't able to allocate | |
988 | * additional buffer pages. All we can do now | |
e136d092 | 989 | * is turn off TCP_RCV_COPY_DATA, so the request |
a246b010 CL |
990 | * will not receive any additional updates, |
991 | * and time out. | |
992 | * Any remaining data from this record will | |
993 | * be discarded. | |
994 | */ | |
e136d092 | 995 | transport->tcp_flags &= ~TCP_RCV_COPY_DATA; |
46121cf7 | 996 | dprintk("RPC: XID %08x truncated request\n", |
51971139 | 997 | ntohl(transport->tcp_xid)); |
46121cf7 CL |
998 | dprintk("RPC: xprt = %p, tcp_copied = %lu, " |
999 | "tcp_offset = %u, tcp_reclen = %u\n", | |
1000 | xprt, transport->tcp_copied, | |
1001 | transport->tcp_offset, transport->tcp_reclen); | |
a246b010 CL |
1002 | goto out; |
1003 | } | |
1004 | ||
46121cf7 | 1005 | dprintk("RPC: XID %08x read %Zd bytes\n", |
51971139 | 1006 | ntohl(transport->tcp_xid), r); |
46121cf7 CL |
1007 | dprintk("RPC: xprt = %p, tcp_copied = %lu, tcp_offset = %u, " |
1008 | "tcp_reclen = %u\n", xprt, transport->tcp_copied, | |
1009 | transport->tcp_offset, transport->tcp_reclen); | |
51971139 CL |
1010 | |
1011 | if (transport->tcp_copied == req->rq_private_buf.buflen) | |
e136d092 | 1012 | transport->tcp_flags &= ~TCP_RCV_COPY_DATA; |
51971139 | 1013 | else if (transport->tcp_offset == transport->tcp_reclen) { |
e136d092 CL |
1014 | if (transport->tcp_flags & TCP_RCV_LAST_FRAG) |
1015 | transport->tcp_flags &= ~TCP_RCV_COPY_DATA; | |
a246b010 CL |
1016 | } |
1017 | ||
1018 | out: | |
e136d092 | 1019 | if (!(transport->tcp_flags & TCP_RCV_COPY_DATA)) |
51971139 | 1020 | xprt_complete_rqst(req->rq_task, transport->tcp_copied); |
4a0f8c04 | 1021 | spin_unlock(&xprt->transport_lock); |
51971139 | 1022 | xs_tcp_check_fraghdr(transport); |
a246b010 CL |
1023 | } |
1024 | ||
dd456471 | 1025 | static inline void xs_tcp_read_discard(struct sock_xprt *transport, struct xdr_skb_reader *desc) |
a246b010 CL |
1026 | { |
1027 | size_t len; | |
1028 | ||
51971139 | 1029 | len = transport->tcp_reclen - transport->tcp_offset; |
a246b010 CL |
1030 | if (len > desc->count) |
1031 | len = desc->count; | |
1032 | desc->count -= len; | |
1033 | desc->offset += len; | |
51971139 | 1034 | transport->tcp_offset += len; |
46121cf7 | 1035 | dprintk("RPC: discarded %Zu bytes\n", len); |
51971139 | 1036 | xs_tcp_check_fraghdr(transport); |
a246b010 CL |
1037 | } |
1038 | ||
9903cd1c | 1039 | static int xs_tcp_data_recv(read_descriptor_t *rd_desc, struct sk_buff *skb, unsigned int offset, size_t len) |
a246b010 CL |
1040 | { |
1041 | struct rpc_xprt *xprt = rd_desc->arg.data; | |
51971139 | 1042 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
dd456471 | 1043 | struct xdr_skb_reader desc = { |
a246b010 CL |
1044 | .skb = skb, |
1045 | .offset = offset, | |
1046 | .count = len, | |
9903cd1c | 1047 | }; |
a246b010 | 1048 | |
46121cf7 | 1049 | dprintk("RPC: xs_tcp_data_recv started\n"); |
a246b010 CL |
1050 | do { |
1051 | /* Read in a new fragment marker if necessary */ | |
1052 | /* Can we ever really expect to get completely empty fragments? */ | |
e136d092 | 1053 | if (transport->tcp_flags & TCP_RCV_COPY_FRAGHDR) { |
9903cd1c | 1054 | xs_tcp_read_fraghdr(xprt, &desc); |
a246b010 CL |
1055 | continue; |
1056 | } | |
1057 | /* Read in the xid if necessary */ | |
e136d092 | 1058 | if (transport->tcp_flags & TCP_RCV_COPY_XID) { |
51971139 | 1059 | xs_tcp_read_xid(transport, &desc); |
a246b010 CL |
1060 | continue; |
1061 | } | |
1062 | /* Read in the request data */ | |
e136d092 | 1063 | if (transport->tcp_flags & TCP_RCV_COPY_DATA) { |
9903cd1c | 1064 | xs_tcp_read_request(xprt, &desc); |
a246b010 CL |
1065 | continue; |
1066 | } | |
1067 | /* Skip over any trailing bytes on short reads */ | |
51971139 | 1068 | xs_tcp_read_discard(transport, &desc); |
a246b010 | 1069 | } while (desc.count); |
46121cf7 | 1070 | dprintk("RPC: xs_tcp_data_recv done\n"); |
a246b010 CL |
1071 | return len - desc.count; |
1072 | } | |
1073 | ||
9903cd1c CL |
1074 | /** |
1075 | * xs_tcp_data_ready - "data ready" callback for TCP sockets | |
1076 | * @sk: socket with data to read | |
1077 | * @bytes: how much data to read | |
1078 | * | |
1079 | */ | |
1080 | static void xs_tcp_data_ready(struct sock *sk, int bytes) | |
a246b010 CL |
1081 | { |
1082 | struct rpc_xprt *xprt; | |
1083 | read_descriptor_t rd_desc; | |
1084 | ||
46121cf7 CL |
1085 | dprintk("RPC: xs_tcp_data_ready...\n"); |
1086 | ||
a246b010 | 1087 | read_lock(&sk->sk_callback_lock); |
9903cd1c | 1088 | if (!(xprt = xprt_from_sock(sk))) |
a246b010 | 1089 | goto out; |
a246b010 CL |
1090 | if (xprt->shutdown) |
1091 | goto out; | |
1092 | ||
9903cd1c | 1093 | /* We use rd_desc to pass struct xprt to xs_tcp_data_recv */ |
a246b010 CL |
1094 | rd_desc.arg.data = xprt; |
1095 | rd_desc.count = 65536; | |
9903cd1c | 1096 | tcp_read_sock(sk, &rd_desc, xs_tcp_data_recv); |
a246b010 CL |
1097 | out: |
1098 | read_unlock(&sk->sk_callback_lock); | |
1099 | } | |
1100 | ||
9903cd1c CL |
1101 | /** |
1102 | * xs_tcp_state_change - callback to handle TCP socket state changes | |
1103 | * @sk: socket whose state has changed | |
1104 | * | |
1105 | */ | |
1106 | static void xs_tcp_state_change(struct sock *sk) | |
a246b010 | 1107 | { |
9903cd1c | 1108 | struct rpc_xprt *xprt; |
a246b010 CL |
1109 | |
1110 | read_lock(&sk->sk_callback_lock); | |
1111 | if (!(xprt = xprt_from_sock(sk))) | |
1112 | goto out; | |
46121cf7 CL |
1113 | dprintk("RPC: xs_tcp_state_change client %p...\n", xprt); |
1114 | dprintk("RPC: state %x conn %d dead %d zapped %d\n", | |
1115 | sk->sk_state, xprt_connected(xprt), | |
1116 | sock_flag(sk, SOCK_DEAD), | |
1117 | sock_flag(sk, SOCK_ZAPPED)); | |
a246b010 CL |
1118 | |
1119 | switch (sk->sk_state) { | |
1120 | case TCP_ESTABLISHED: | |
4a0f8c04 | 1121 | spin_lock_bh(&xprt->transport_lock); |
a246b010 | 1122 | if (!xprt_test_and_set_connected(xprt)) { |
51971139 CL |
1123 | struct sock_xprt *transport = container_of(xprt, |
1124 | struct sock_xprt, xprt); | |
1125 | ||
a246b010 | 1126 | /* Reset TCP record info */ |
51971139 CL |
1127 | transport->tcp_offset = 0; |
1128 | transport->tcp_reclen = 0; | |
1129 | transport->tcp_copied = 0; | |
e136d092 CL |
1130 | transport->tcp_flags = |
1131 | TCP_RCV_COPY_FRAGHDR | TCP_RCV_COPY_XID; | |
51971139 | 1132 | |
44fbac22 | 1133 | xprt_wake_pending_tasks(xprt, 0); |
a246b010 | 1134 | } |
4a0f8c04 | 1135 | spin_unlock_bh(&xprt->transport_lock); |
a246b010 | 1136 | break; |
3b948ae5 TM |
1137 | case TCP_FIN_WAIT1: |
1138 | /* The client initiated a shutdown of the socket */ | |
663b8858 | 1139 | xprt->reestablish_timeout = 0; |
3b948ae5 TM |
1140 | set_bit(XPRT_CLOSING, &xprt->state); |
1141 | smp_mb__before_clear_bit(); | |
1142 | clear_bit(XPRT_CONNECTED, &xprt->state); | |
ef803670 | 1143 | clear_bit(XPRT_CLOSE_WAIT, &xprt->state); |
3b948ae5 | 1144 | smp_mb__after_clear_bit(); |
a246b010 | 1145 | break; |
632e3bdc | 1146 | case TCP_CLOSE_WAIT: |
3b948ae5 TM |
1147 | /* The server initiated a shutdown of the socket */ |
1148 | set_bit(XPRT_CLOSING, &xprt->state); | |
66af1e55 | 1149 | xprt_force_disconnect(xprt); |
663b8858 TM |
1150 | case TCP_SYN_SENT: |
1151 | case TCP_CLOSING: | |
1152 | /* | |
1153 | * If the server closed down the connection, make sure that | |
1154 | * we back off before reconnecting | |
1155 | */ | |
1156 | if (xprt->reestablish_timeout < XS_TCP_INIT_REEST_TO) | |
1157 | xprt->reestablish_timeout = XS_TCP_INIT_REEST_TO; | |
3b948ae5 TM |
1158 | break; |
1159 | case TCP_LAST_ACK: | |
1160 | smp_mb__before_clear_bit(); | |
1161 | clear_bit(XPRT_CONNECTED, &xprt->state); | |
1162 | smp_mb__after_clear_bit(); | |
1163 | break; | |
1164 | case TCP_CLOSE: | |
1165 | smp_mb__before_clear_bit(); | |
ef803670 | 1166 | clear_bit(XPRT_CLOSE_WAIT, &xprt->state); |
3b948ae5 TM |
1167 | clear_bit(XPRT_CLOSING, &xprt->state); |
1168 | smp_mb__after_clear_bit(); | |
1169 | /* Mark transport as closed and wake up all pending tasks */ | |
62da3b24 | 1170 | xprt_disconnect_done(xprt); |
a246b010 CL |
1171 | } |
1172 | out: | |
1173 | read_unlock(&sk->sk_callback_lock); | |
1174 | } | |
1175 | ||
9903cd1c | 1176 | /** |
c7b2cae8 CL |
1177 | * xs_udp_write_space - callback invoked when socket buffer space |
1178 | * becomes available | |
9903cd1c CL |
1179 | * @sk: socket whose state has changed |
1180 | * | |
a246b010 CL |
1181 | * Called when more output buffer space is available for this socket. |
1182 | * We try not to wake our writers until they can make "significant" | |
c7b2cae8 | 1183 | * progress, otherwise we'll waste resources thrashing kernel_sendmsg |
a246b010 CL |
1184 | * with a bunch of small requests. |
1185 | */ | |
c7b2cae8 | 1186 | static void xs_udp_write_space(struct sock *sk) |
a246b010 | 1187 | { |
a246b010 | 1188 | read_lock(&sk->sk_callback_lock); |
a246b010 | 1189 | |
c7b2cae8 CL |
1190 | /* from net/core/sock.c:sock_def_write_space */ |
1191 | if (sock_writeable(sk)) { | |
1192 | struct socket *sock; | |
1193 | struct rpc_xprt *xprt; | |
1194 | ||
1195 | if (unlikely(!(sock = sk->sk_socket))) | |
a246b010 | 1196 | goto out; |
c7b2cae8 CL |
1197 | if (unlikely(!(xprt = xprt_from_sock(sk)))) |
1198 | goto out; | |
1199 | if (unlikely(!test_and_clear_bit(SOCK_NOSPACE, &sock->flags))) | |
a246b010 | 1200 | goto out; |
c7b2cae8 CL |
1201 | |
1202 | xprt_write_space(xprt); | |
a246b010 CL |
1203 | } |
1204 | ||
c7b2cae8 CL |
1205 | out: |
1206 | read_unlock(&sk->sk_callback_lock); | |
1207 | } | |
a246b010 | 1208 | |
c7b2cae8 CL |
1209 | /** |
1210 | * xs_tcp_write_space - callback invoked when socket buffer space | |
1211 | * becomes available | |
1212 | * @sk: socket whose state has changed | |
1213 | * | |
1214 | * Called when more output buffer space is available for this socket. | |
1215 | * We try not to wake our writers until they can make "significant" | |
1216 | * progress, otherwise we'll waste resources thrashing kernel_sendmsg | |
1217 | * with a bunch of small requests. | |
1218 | */ | |
1219 | static void xs_tcp_write_space(struct sock *sk) | |
1220 | { | |
1221 | read_lock(&sk->sk_callback_lock); | |
1222 | ||
1223 | /* from net/core/stream.c:sk_stream_write_space */ | |
1224 | if (sk_stream_wspace(sk) >= sk_stream_min_wspace(sk)) { | |
1225 | struct socket *sock; | |
1226 | struct rpc_xprt *xprt; | |
1227 | ||
1228 | if (unlikely(!(sock = sk->sk_socket))) | |
1229 | goto out; | |
1230 | if (unlikely(!(xprt = xprt_from_sock(sk)))) | |
1231 | goto out; | |
1232 | if (unlikely(!test_and_clear_bit(SOCK_NOSPACE, &sock->flags))) | |
1233 | goto out; | |
1234 | ||
1235 | xprt_write_space(xprt); | |
1236 | } | |
1237 | ||
1238 | out: | |
a246b010 CL |
1239 | read_unlock(&sk->sk_callback_lock); |
1240 | } | |
1241 | ||
470056c2 | 1242 | static void xs_udp_do_set_buffer_size(struct rpc_xprt *xprt) |
a246b010 | 1243 | { |
ee0ac0c2 CL |
1244 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
1245 | struct sock *sk = transport->inet; | |
a246b010 | 1246 | |
7c6e066e | 1247 | if (transport->rcvsize) { |
a246b010 | 1248 | sk->sk_userlocks |= SOCK_RCVBUF_LOCK; |
7c6e066e | 1249 | sk->sk_rcvbuf = transport->rcvsize * xprt->max_reqs * 2; |
a246b010 | 1250 | } |
7c6e066e | 1251 | if (transport->sndsize) { |
a246b010 | 1252 | sk->sk_userlocks |= SOCK_SNDBUF_LOCK; |
7c6e066e | 1253 | sk->sk_sndbuf = transport->sndsize * xprt->max_reqs * 2; |
a246b010 CL |
1254 | sk->sk_write_space(sk); |
1255 | } | |
1256 | } | |
1257 | ||
43118c29 | 1258 | /** |
470056c2 | 1259 | * xs_udp_set_buffer_size - set send and receive limits |
43118c29 | 1260 | * @xprt: generic transport |
470056c2 CL |
1261 | * @sndsize: requested size of send buffer, in bytes |
1262 | * @rcvsize: requested size of receive buffer, in bytes | |
43118c29 | 1263 | * |
470056c2 | 1264 | * Set socket send and receive buffer size limits. |
43118c29 | 1265 | */ |
470056c2 | 1266 | static void xs_udp_set_buffer_size(struct rpc_xprt *xprt, size_t sndsize, size_t rcvsize) |
43118c29 | 1267 | { |
7c6e066e CL |
1268 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
1269 | ||
1270 | transport->sndsize = 0; | |
470056c2 | 1271 | if (sndsize) |
7c6e066e CL |
1272 | transport->sndsize = sndsize + 1024; |
1273 | transport->rcvsize = 0; | |
470056c2 | 1274 | if (rcvsize) |
7c6e066e | 1275 | transport->rcvsize = rcvsize + 1024; |
470056c2 CL |
1276 | |
1277 | xs_udp_do_set_buffer_size(xprt); | |
43118c29 CL |
1278 | } |
1279 | ||
46c0ee8b CL |
1280 | /** |
1281 | * xs_udp_timer - called when a retransmit timeout occurs on a UDP transport | |
1282 | * @task: task that timed out | |
1283 | * | |
1284 | * Adjust the congestion window after a retransmit timeout has occurred. | |
1285 | */ | |
1286 | static void xs_udp_timer(struct rpc_task *task) | |
1287 | { | |
1288 | xprt_adjust_cwnd(task, -ETIMEDOUT); | |
1289 | } | |
1290 | ||
b85d8806 CL |
1291 | static unsigned short xs_get_random_port(void) |
1292 | { | |
1293 | unsigned short range = xprt_max_resvport - xprt_min_resvport; | |
1294 | unsigned short rand = (unsigned short) net_random() % range; | |
1295 | return rand + xprt_min_resvport; | |
1296 | } | |
1297 | ||
92200412 CL |
1298 | /** |
1299 | * xs_set_port - reset the port number in the remote endpoint address | |
1300 | * @xprt: generic transport | |
1301 | * @port: new port number | |
1302 | * | |
1303 | */ | |
1304 | static void xs_set_port(struct rpc_xprt *xprt, unsigned short port) | |
1305 | { | |
95392c59 | 1306 | struct sockaddr *addr = xs_addr(xprt); |
c4efcb1d | 1307 | |
46121cf7 | 1308 | dprintk("RPC: setting port for xprt %p to %u\n", xprt, port); |
c4efcb1d | 1309 | |
20612005 CL |
1310 | switch (addr->sa_family) { |
1311 | case AF_INET: | |
1312 | ((struct sockaddr_in *)addr)->sin_port = htons(port); | |
1313 | break; | |
1314 | case AF_INET6: | |
1315 | ((struct sockaddr_in6 *)addr)->sin6_port = htons(port); | |
1316 | break; | |
1317 | default: | |
1318 | BUG(); | |
1319 | } | |
92200412 CL |
1320 | } |
1321 | ||
67a391d7 TM |
1322 | static unsigned short xs_get_srcport(struct sock_xprt *transport, struct socket *sock) |
1323 | { | |
1324 | unsigned short port = transport->port; | |
1325 | ||
1326 | if (port == 0 && transport->xprt.resvport) | |
1327 | port = xs_get_random_port(); | |
1328 | return port; | |
1329 | } | |
1330 | ||
1331 | static unsigned short xs_next_srcport(struct sock_xprt *transport, struct socket *sock, unsigned short port) | |
1332 | { | |
1333 | if (transport->port != 0) | |
1334 | transport->port = 0; | |
1335 | if (!transport->xprt.resvport) | |
1336 | return 0; | |
1337 | if (port <= xprt_min_resvport || port > xprt_max_resvport) | |
1338 | return xprt_max_resvport; | |
1339 | return --port; | |
1340 | } | |
1341 | ||
7dc753f0 | 1342 | static int xs_bind4(struct sock_xprt *transport, struct socket *sock) |
a246b010 CL |
1343 | { |
1344 | struct sockaddr_in myaddr = { | |
1345 | .sin_family = AF_INET, | |
1346 | }; | |
d3bc9a1d | 1347 | struct sockaddr_in *sa; |
67a391d7 TM |
1348 | int err, nloop = 0; |
1349 | unsigned short port = xs_get_srcport(transport, sock); | |
1350 | unsigned short last; | |
a246b010 | 1351 | |
d3bc9a1d FM |
1352 | sa = (struct sockaddr_in *)&transport->addr; |
1353 | myaddr.sin_addr = sa->sin_addr; | |
a246b010 CL |
1354 | do { |
1355 | myaddr.sin_port = htons(port); | |
e6242e92 | 1356 | err = kernel_bind(sock, (struct sockaddr *) &myaddr, |
a246b010 | 1357 | sizeof(myaddr)); |
67a391d7 | 1358 | if (port == 0) |
d3bc9a1d | 1359 | break; |
a246b010 | 1360 | if (err == 0) { |
c8475461 | 1361 | transport->port = port; |
d3bc9a1d | 1362 | break; |
a246b010 | 1363 | } |
67a391d7 TM |
1364 | last = port; |
1365 | port = xs_next_srcport(transport, sock, port); | |
1366 | if (port > last) | |
1367 | nloop++; | |
1368 | } while (err == -EADDRINUSE && nloop != 2); | |
7dc753f0 CL |
1369 | dprintk("RPC: %s "NIPQUAD_FMT":%u: %s (%d)\n", |
1370 | __FUNCTION__, NIPQUAD(myaddr.sin_addr), | |
1371 | port, err ? "failed" : "ok", err); | |
a246b010 CL |
1372 | return err; |
1373 | } | |
1374 | ||
90058d37 CL |
1375 | static int xs_bind6(struct sock_xprt *transport, struct socket *sock) |
1376 | { | |
1377 | struct sockaddr_in6 myaddr = { | |
1378 | .sin6_family = AF_INET6, | |
1379 | }; | |
1380 | struct sockaddr_in6 *sa; | |
67a391d7 TM |
1381 | int err, nloop = 0; |
1382 | unsigned short port = xs_get_srcport(transport, sock); | |
1383 | unsigned short last; | |
90058d37 | 1384 | |
90058d37 CL |
1385 | sa = (struct sockaddr_in6 *)&transport->addr; |
1386 | myaddr.sin6_addr = sa->sin6_addr; | |
1387 | do { | |
1388 | myaddr.sin6_port = htons(port); | |
1389 | err = kernel_bind(sock, (struct sockaddr *) &myaddr, | |
1390 | sizeof(myaddr)); | |
67a391d7 | 1391 | if (port == 0) |
90058d37 CL |
1392 | break; |
1393 | if (err == 0) { | |
1394 | transport->port = port; | |
1395 | break; | |
1396 | } | |
67a391d7 TM |
1397 | last = port; |
1398 | port = xs_next_srcport(transport, sock, port); | |
1399 | if (port > last) | |
1400 | nloop++; | |
1401 | } while (err == -EADDRINUSE && nloop != 2); | |
90058d37 CL |
1402 | dprintk("RPC: xs_bind6 "NIP6_FMT":%u: %s (%d)\n", |
1403 | NIP6(myaddr.sin6_addr), port, err ? "failed" : "ok", err); | |
a246b010 CL |
1404 | return err; |
1405 | } | |
1406 | ||
ed07536e PZ |
1407 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
1408 | static struct lock_class_key xs_key[2]; | |
1409 | static struct lock_class_key xs_slock_key[2]; | |
1410 | ||
8945ee5e | 1411 | static inline void xs_reclassify_socket4(struct socket *sock) |
ed07536e PZ |
1412 | { |
1413 | struct sock *sk = sock->sk; | |
8945ee5e | 1414 | |
02b3d346 | 1415 | BUG_ON(sock_owned_by_user(sk)); |
8945ee5e CL |
1416 | sock_lock_init_class_and_name(sk, "slock-AF_INET-RPC", |
1417 | &xs_slock_key[0], "sk_lock-AF_INET-RPC", &xs_key[0]); | |
1418 | } | |
ed07536e | 1419 | |
8945ee5e CL |
1420 | static inline void xs_reclassify_socket6(struct socket *sock) |
1421 | { | |
1422 | struct sock *sk = sock->sk; | |
ed07536e | 1423 | |
f4921aff | 1424 | BUG_ON(sock_owned_by_user(sk)); |
8945ee5e CL |
1425 | sock_lock_init_class_and_name(sk, "slock-AF_INET6-RPC", |
1426 | &xs_slock_key[1], "sk_lock-AF_INET6-RPC", &xs_key[1]); | |
ed07536e PZ |
1427 | } |
1428 | #else | |
8945ee5e CL |
1429 | static inline void xs_reclassify_socket4(struct socket *sock) |
1430 | { | |
1431 | } | |
1432 | ||
1433 | static inline void xs_reclassify_socket6(struct socket *sock) | |
ed07536e PZ |
1434 | { |
1435 | } | |
1436 | #endif | |
1437 | ||
16be2d20 CL |
1438 | static void xs_udp_finish_connecting(struct rpc_xprt *xprt, struct socket *sock) |
1439 | { | |
1440 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); | |
1441 | ||
1442 | if (!transport->inet) { | |
1443 | struct sock *sk = sock->sk; | |
1444 | ||
1445 | write_lock_bh(&sk->sk_callback_lock); | |
1446 | ||
1447 | sk->sk_user_data = xprt; | |
1448 | transport->old_data_ready = sk->sk_data_ready; | |
1449 | transport->old_state_change = sk->sk_state_change; | |
1450 | transport->old_write_space = sk->sk_write_space; | |
1451 | sk->sk_data_ready = xs_udp_data_ready; | |
1452 | sk->sk_write_space = xs_udp_write_space; | |
1453 | sk->sk_no_check = UDP_CSUM_NORCV; | |
1454 | sk->sk_allocation = GFP_ATOMIC; | |
1455 | ||
1456 | xprt_set_connected(xprt); | |
1457 | ||
1458 | /* Reset to new socket */ | |
1459 | transport->sock = sock; | |
1460 | transport->inet = sk; | |
1461 | ||
1462 | write_unlock_bh(&sk->sk_callback_lock); | |
1463 | } | |
1464 | xs_udp_do_set_buffer_size(xprt); | |
1465 | } | |
1466 | ||
b0d93ad5 | 1467 | /** |
9c3d72de | 1468 | * xs_udp_connect_worker4 - set up a UDP socket |
65f27f38 | 1469 | * @work: RPC transport to connect |
b0d93ad5 CL |
1470 | * |
1471 | * Invoked by a work queue tasklet. | |
1472 | */ | |
9c3d72de | 1473 | static void xs_udp_connect_worker4(struct work_struct *work) |
a246b010 | 1474 | { |
34161db6 TM |
1475 | struct sock_xprt *transport = |
1476 | container_of(work, struct sock_xprt, connect_worker.work); | |
c8475461 | 1477 | struct rpc_xprt *xprt = &transport->xprt; |
ee0ac0c2 | 1478 | struct socket *sock = transport->sock; |
b0d93ad5 | 1479 | int err, status = -EIO; |
9903cd1c | 1480 | |
ec739ef0 | 1481 | if (xprt->shutdown || !xprt_bound(xprt)) |
b0d93ad5 | 1482 | goto out; |
9903cd1c | 1483 | |
b0d93ad5 CL |
1484 | /* Start by resetting any existing state */ |
1485 | xs_close(xprt); | |
9903cd1c | 1486 | |
b0d93ad5 | 1487 | if ((err = sock_create_kern(PF_INET, SOCK_DGRAM, IPPROTO_UDP, &sock)) < 0) { |
46121cf7 | 1488 | dprintk("RPC: can't create UDP transport socket (%d).\n", -err); |
b0d93ad5 CL |
1489 | goto out; |
1490 | } | |
8945ee5e | 1491 | xs_reclassify_socket4(sock); |
9903cd1c | 1492 | |
7dc753f0 | 1493 | if (xs_bind4(transport, sock)) { |
b0d93ad5 CL |
1494 | sock_release(sock); |
1495 | goto out; | |
1496 | } | |
9903cd1c | 1497 | |
46121cf7 | 1498 | dprintk("RPC: worker connecting xprt %p to address: %s\n", |
7559c7a2 | 1499 | xprt, xprt->address_strings[RPC_DISPLAY_ALL]); |
edb267a6 | 1500 | |
16be2d20 | 1501 | xs_udp_finish_connecting(xprt, sock); |
b0d93ad5 CL |
1502 | status = 0; |
1503 | out: | |
1504 | xprt_wake_pending_tasks(xprt, status); | |
1505 | xprt_clear_connecting(xprt); | |
a246b010 | 1506 | } |
a246b010 | 1507 | |
68e220bd CL |
1508 | /** |
1509 | * xs_udp_connect_worker6 - set up a UDP socket | |
1510 | * @work: RPC transport to connect | |
1511 | * | |
1512 | * Invoked by a work queue tasklet. | |
1513 | */ | |
1514 | static void xs_udp_connect_worker6(struct work_struct *work) | |
1515 | { | |
1516 | struct sock_xprt *transport = | |
1517 | container_of(work, struct sock_xprt, connect_worker.work); | |
1518 | struct rpc_xprt *xprt = &transport->xprt; | |
1519 | struct socket *sock = transport->sock; | |
1520 | int err, status = -EIO; | |
a246b010 | 1521 | |
68e220bd CL |
1522 | if (xprt->shutdown || !xprt_bound(xprt)) |
1523 | goto out; | |
b0d93ad5 | 1524 | |
68e220bd CL |
1525 | /* Start by resetting any existing state */ |
1526 | xs_close(xprt); | |
a246b010 | 1527 | |
68e220bd CL |
1528 | if ((err = sock_create_kern(PF_INET6, SOCK_DGRAM, IPPROTO_UDP, &sock)) < 0) { |
1529 | dprintk("RPC: can't create UDP transport socket (%d).\n", -err); | |
1530 | goto out; | |
1531 | } | |
8945ee5e | 1532 | xs_reclassify_socket6(sock); |
a246b010 | 1533 | |
68e220bd CL |
1534 | if (xs_bind6(transport, sock) < 0) { |
1535 | sock_release(sock); | |
1536 | goto out; | |
b0d93ad5 | 1537 | } |
68e220bd CL |
1538 | |
1539 | dprintk("RPC: worker connecting xprt %p to address: %s\n", | |
1540 | xprt, xprt->address_strings[RPC_DISPLAY_ALL]); | |
1541 | ||
1542 | xs_udp_finish_connecting(xprt, sock); | |
b0d93ad5 CL |
1543 | status = 0; |
1544 | out: | |
1545 | xprt_wake_pending_tasks(xprt, status); | |
1546 | xprt_clear_connecting(xprt); | |
a246b010 CL |
1547 | } |
1548 | ||
3167e12c CL |
1549 | /* |
1550 | * We need to preserve the port number so the reply cache on the server can | |
1551 | * find our cached RPC replies when we get around to reconnecting. | |
1552 | */ | |
1553 | static void xs_tcp_reuse_connection(struct rpc_xprt *xprt) | |
1554 | { | |
1555 | int result; | |
ee0ac0c2 | 1556 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
3167e12c CL |
1557 | struct sockaddr any; |
1558 | ||
46121cf7 | 1559 | dprintk("RPC: disconnecting xprt %p to reuse port\n", xprt); |
3167e12c CL |
1560 | |
1561 | /* | |
1562 | * Disconnect the transport socket by doing a connect operation | |
1563 | * with AF_UNSPEC. This should return immediately... | |
1564 | */ | |
1565 | memset(&any, 0, sizeof(any)); | |
1566 | any.sa_family = AF_UNSPEC; | |
ee0ac0c2 | 1567 | result = kernel_connect(transport->sock, &any, sizeof(any), 0); |
3167e12c | 1568 | if (result) |
46121cf7 | 1569 | dprintk("RPC: AF_UNSPEC connect return code %d\n", |
3167e12c CL |
1570 | result); |
1571 | } | |
1572 | ||
16be2d20 | 1573 | static int xs_tcp_finish_connecting(struct rpc_xprt *xprt, struct socket *sock) |
a246b010 | 1574 | { |
16be2d20 | 1575 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
edb267a6 | 1576 | |
ee0ac0c2 | 1577 | if (!transport->inet) { |
b0d93ad5 CL |
1578 | struct sock *sk = sock->sk; |
1579 | ||
1580 | write_lock_bh(&sk->sk_callback_lock); | |
1581 | ||
1582 | sk->sk_user_data = xprt; | |
314dfd79 CL |
1583 | transport->old_data_ready = sk->sk_data_ready; |
1584 | transport->old_state_change = sk->sk_state_change; | |
1585 | transport->old_write_space = sk->sk_write_space; | |
b0d93ad5 CL |
1586 | sk->sk_data_ready = xs_tcp_data_ready; |
1587 | sk->sk_state_change = xs_tcp_state_change; | |
1588 | sk->sk_write_space = xs_tcp_write_space; | |
b079fa7b | 1589 | sk->sk_allocation = GFP_ATOMIC; |
3167e12c CL |
1590 | |
1591 | /* socket options */ | |
1592 | sk->sk_userlocks |= SOCK_BINDPORT_LOCK; | |
1593 | sock_reset_flag(sk, SOCK_LINGER); | |
1594 | tcp_sk(sk)->linger2 = 0; | |
1595 | tcp_sk(sk)->nonagle |= TCP_NAGLE_OFF; | |
b0d93ad5 CL |
1596 | |
1597 | xprt_clear_connected(xprt); | |
1598 | ||
1599 | /* Reset to new socket */ | |
ee0ac0c2 CL |
1600 | transport->sock = sock; |
1601 | transport->inet = sk; | |
b0d93ad5 CL |
1602 | |
1603 | write_unlock_bh(&sk->sk_callback_lock); | |
1604 | } | |
1605 | ||
1606 | /* Tell the socket layer to start connecting... */ | |
262ca07d CL |
1607 | xprt->stat.connect_count++; |
1608 | xprt->stat.connect_start = jiffies; | |
95392c59 | 1609 | return kernel_connect(sock, xs_addr(xprt), xprt->addrlen, O_NONBLOCK); |
16be2d20 CL |
1610 | } |
1611 | ||
9903cd1c | 1612 | /** |
9c3d72de | 1613 | * xs_tcp_connect_worker4 - connect a TCP socket to a remote endpoint |
65f27f38 | 1614 | * @work: RPC transport to connect |
9903cd1c CL |
1615 | * |
1616 | * Invoked by a work queue tasklet. | |
a246b010 | 1617 | */ |
9c3d72de | 1618 | static void xs_tcp_connect_worker4(struct work_struct *work) |
a246b010 | 1619 | { |
34161db6 TM |
1620 | struct sock_xprt *transport = |
1621 | container_of(work, struct sock_xprt, connect_worker.work); | |
c8475461 | 1622 | struct rpc_xprt *xprt = &transport->xprt; |
ee0ac0c2 | 1623 | struct socket *sock = transport->sock; |
b0d93ad5 | 1624 | int err, status = -EIO; |
a246b010 | 1625 | |
ec739ef0 | 1626 | if (xprt->shutdown || !xprt_bound(xprt)) |
a246b010 CL |
1627 | goto out; |
1628 | ||
ee0ac0c2 | 1629 | if (!sock) { |
3167e12c CL |
1630 | /* start from scratch */ |
1631 | if ((err = sock_create_kern(PF_INET, SOCK_STREAM, IPPROTO_TCP, &sock)) < 0) { | |
16be2d20 | 1632 | dprintk("RPC: can't create TCP transport socket (%d).\n", -err); |
3167e12c CL |
1633 | goto out; |
1634 | } | |
8945ee5e | 1635 | xs_reclassify_socket4(sock); |
a246b010 | 1636 | |
16be2d20 | 1637 | if (xs_bind4(transport, sock) < 0) { |
3167e12c CL |
1638 | sock_release(sock); |
1639 | goto out; | |
1640 | } | |
1641 | } else | |
1642 | /* "close" the socket, preserving the local port */ | |
1643 | xs_tcp_reuse_connection(xprt); | |
a246b010 | 1644 | |
46121cf7 | 1645 | dprintk("RPC: worker connecting xprt %p to address: %s\n", |
7559c7a2 | 1646 | xprt, xprt->address_strings[RPC_DISPLAY_ALL]); |
edb267a6 | 1647 | |
16be2d20 | 1648 | status = xs_tcp_finish_connecting(xprt, sock); |
46121cf7 CL |
1649 | dprintk("RPC: %p connect status %d connected %d sock state %d\n", |
1650 | xprt, -status, xprt_connected(xprt), | |
1651 | sock->sk->sk_state); | |
a246b010 CL |
1652 | if (status < 0) { |
1653 | switch (status) { | |
1654 | case -EINPROGRESS: | |
1655 | case -EALREADY: | |
1656 | goto out_clear; | |
3167e12c CL |
1657 | case -ECONNREFUSED: |
1658 | case -ECONNRESET: | |
1659 | /* retry with existing socket, after a delay */ | |
1660 | break; | |
1661 | default: | |
1662 | /* get rid of existing socket, and retry */ | |
e06799f9 | 1663 | xs_tcp_shutdown(xprt); |
a246b010 CL |
1664 | } |
1665 | } | |
1666 | out: | |
44fbac22 | 1667 | xprt_wake_pending_tasks(xprt, status); |
68e220bd CL |
1668 | out_clear: |
1669 | xprt_clear_connecting(xprt); | |
1670 | } | |
b0d93ad5 | 1671 | |
68e220bd CL |
1672 | /** |
1673 | * xs_tcp_connect_worker6 - connect a TCP socket to a remote endpoint | |
1674 | * @work: RPC transport to connect | |
1675 | * | |
1676 | * Invoked by a work queue tasklet. | |
1677 | */ | |
1678 | static void xs_tcp_connect_worker6(struct work_struct *work) | |
1679 | { | |
1680 | struct sock_xprt *transport = | |
1681 | container_of(work, struct sock_xprt, connect_worker.work); | |
1682 | struct rpc_xprt *xprt = &transport->xprt; | |
1683 | struct socket *sock = transport->sock; | |
1684 | int err, status = -EIO; | |
3167e12c | 1685 | |
68e220bd CL |
1686 | if (xprt->shutdown || !xprt_bound(xprt)) |
1687 | goto out; | |
b0d93ad5 | 1688 | |
68e220bd CL |
1689 | if (!sock) { |
1690 | /* start from scratch */ | |
1691 | if ((err = sock_create_kern(PF_INET6, SOCK_STREAM, IPPROTO_TCP, &sock)) < 0) { | |
1692 | dprintk("RPC: can't create TCP transport socket (%d).\n", -err); | |
1693 | goto out; | |
1694 | } | |
8945ee5e | 1695 | xs_reclassify_socket6(sock); |
b0d93ad5 | 1696 | |
68e220bd CL |
1697 | if (xs_bind6(transport, sock) < 0) { |
1698 | sock_release(sock); | |
1699 | goto out; | |
1700 | } | |
1701 | } else | |
1702 | /* "close" the socket, preserving the local port */ | |
1703 | xs_tcp_reuse_connection(xprt); | |
b0d93ad5 | 1704 | |
68e220bd CL |
1705 | dprintk("RPC: worker connecting xprt %p to address: %s\n", |
1706 | xprt, xprt->address_strings[RPC_DISPLAY_ALL]); | |
b0d93ad5 | 1707 | |
68e220bd | 1708 | status = xs_tcp_finish_connecting(xprt, sock); |
46121cf7 | 1709 | dprintk("RPC: %p connect status %d connected %d sock state %d\n", |
68e220bd | 1710 | xprt, -status, xprt_connected(xprt), sock->sk->sk_state); |
a246b010 CL |
1711 | if (status < 0) { |
1712 | switch (status) { | |
1713 | case -EINPROGRESS: | |
1714 | case -EALREADY: | |
1715 | goto out_clear; | |
3167e12c CL |
1716 | case -ECONNREFUSED: |
1717 | case -ECONNRESET: | |
1718 | /* retry with existing socket, after a delay */ | |
1719 | break; | |
1720 | default: | |
1721 | /* get rid of existing socket, and retry */ | |
e06799f9 | 1722 | xs_tcp_shutdown(xprt); |
a246b010 CL |
1723 | } |
1724 | } | |
1725 | out: | |
44fbac22 | 1726 | xprt_wake_pending_tasks(xprt, status); |
a246b010 | 1727 | out_clear: |
2226feb6 | 1728 | xprt_clear_connecting(xprt); |
a246b010 CL |
1729 | } |
1730 | ||
9903cd1c CL |
1731 | /** |
1732 | * xs_connect - connect a socket to a remote endpoint | |
1733 | * @task: address of RPC task that manages state of connect request | |
1734 | * | |
1735 | * TCP: If the remote end dropped the connection, delay reconnecting. | |
03bf4b70 CL |
1736 | * |
1737 | * UDP socket connects are synchronous, but we use a work queue anyway | |
1738 | * to guarantee that even unprivileged user processes can set up a | |
1739 | * socket on a privileged port. | |
1740 | * | |
1741 | * If a UDP socket connect fails, the delay behavior here prevents | |
1742 | * retry floods (hard mounts). | |
9903cd1c CL |
1743 | */ |
1744 | static void xs_connect(struct rpc_task *task) | |
a246b010 CL |
1745 | { |
1746 | struct rpc_xprt *xprt = task->tk_xprt; | |
ee0ac0c2 | 1747 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
a246b010 | 1748 | |
b0d93ad5 CL |
1749 | if (xprt_test_and_set_connecting(xprt)) |
1750 | return; | |
1751 | ||
ee0ac0c2 | 1752 | if (transport->sock != NULL) { |
46121cf7 CL |
1753 | dprintk("RPC: xs_connect delayed xprt %p for %lu " |
1754 | "seconds\n", | |
03bf4b70 | 1755 | xprt, xprt->reestablish_timeout / HZ); |
c1384c9c TM |
1756 | queue_delayed_work(rpciod_workqueue, |
1757 | &transport->connect_worker, | |
1758 | xprt->reestablish_timeout); | |
03bf4b70 CL |
1759 | xprt->reestablish_timeout <<= 1; |
1760 | if (xprt->reestablish_timeout > XS_TCP_MAX_REEST_TO) | |
1761 | xprt->reestablish_timeout = XS_TCP_MAX_REEST_TO; | |
b0d93ad5 | 1762 | } else { |
46121cf7 | 1763 | dprintk("RPC: xs_connect scheduled xprt %p\n", xprt); |
c1384c9c TM |
1764 | queue_delayed_work(rpciod_workqueue, |
1765 | &transport->connect_worker, 0); | |
a246b010 CL |
1766 | } |
1767 | } | |
1768 | ||
e06799f9 TM |
1769 | static void xs_tcp_connect(struct rpc_task *task) |
1770 | { | |
1771 | struct rpc_xprt *xprt = task->tk_xprt; | |
1772 | ||
1773 | /* Initiate graceful shutdown of the socket if not already done */ | |
1774 | if (test_bit(XPRT_CONNECTED, &xprt->state)) | |
1775 | xs_tcp_shutdown(xprt); | |
1776 | /* Exit if we need to wait for socket shutdown to complete */ | |
1777 | if (test_bit(XPRT_CLOSING, &xprt->state)) | |
1778 | return; | |
1779 | xs_connect(task); | |
1780 | } | |
1781 | ||
262ca07d CL |
1782 | /** |
1783 | * xs_udp_print_stats - display UDP socket-specifc stats | |
1784 | * @xprt: rpc_xprt struct containing statistics | |
1785 | * @seq: output file | |
1786 | * | |
1787 | */ | |
1788 | static void xs_udp_print_stats(struct rpc_xprt *xprt, struct seq_file *seq) | |
1789 | { | |
c8475461 CL |
1790 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
1791 | ||
262ca07d | 1792 | seq_printf(seq, "\txprt:\tudp %u %lu %lu %lu %lu %Lu %Lu\n", |
c8475461 | 1793 | transport->port, |
262ca07d CL |
1794 | xprt->stat.bind_count, |
1795 | xprt->stat.sends, | |
1796 | xprt->stat.recvs, | |
1797 | xprt->stat.bad_xids, | |
1798 | xprt->stat.req_u, | |
1799 | xprt->stat.bklog_u); | |
1800 | } | |
1801 | ||
1802 | /** | |
1803 | * xs_tcp_print_stats - display TCP socket-specifc stats | |
1804 | * @xprt: rpc_xprt struct containing statistics | |
1805 | * @seq: output file | |
1806 | * | |
1807 | */ | |
1808 | static void xs_tcp_print_stats(struct rpc_xprt *xprt, struct seq_file *seq) | |
1809 | { | |
c8475461 | 1810 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
262ca07d CL |
1811 | long idle_time = 0; |
1812 | ||
1813 | if (xprt_connected(xprt)) | |
1814 | idle_time = (long)(jiffies - xprt->last_used) / HZ; | |
1815 | ||
1816 | seq_printf(seq, "\txprt:\ttcp %u %lu %lu %lu %ld %lu %lu %lu %Lu %Lu\n", | |
c8475461 | 1817 | transport->port, |
262ca07d CL |
1818 | xprt->stat.bind_count, |
1819 | xprt->stat.connect_count, | |
1820 | xprt->stat.connect_time, | |
1821 | idle_time, | |
1822 | xprt->stat.sends, | |
1823 | xprt->stat.recvs, | |
1824 | xprt->stat.bad_xids, | |
1825 | xprt->stat.req_u, | |
1826 | xprt->stat.bklog_u); | |
1827 | } | |
1828 | ||
262965f5 | 1829 | static struct rpc_xprt_ops xs_udp_ops = { |
43118c29 | 1830 | .set_buffer_size = xs_udp_set_buffer_size, |
12a80469 | 1831 | .reserve_xprt = xprt_reserve_xprt_cong, |
49e9a890 | 1832 | .release_xprt = xprt_release_xprt_cong, |
45160d62 | 1833 | .rpcbind = rpcb_getport_async, |
92200412 | 1834 | .set_port = xs_set_port, |
262965f5 | 1835 | .connect = xs_connect, |
02107148 CL |
1836 | .buf_alloc = rpc_malloc, |
1837 | .buf_free = rpc_free, | |
262965f5 | 1838 | .send_request = xs_udp_send_request, |
fe3aca29 | 1839 | .set_retrans_timeout = xprt_set_retrans_timeout_rtt, |
46c0ee8b | 1840 | .timer = xs_udp_timer, |
a58dd398 | 1841 | .release_request = xprt_release_rqst_cong, |
262965f5 CL |
1842 | .close = xs_close, |
1843 | .destroy = xs_destroy, | |
262ca07d | 1844 | .print_stats = xs_udp_print_stats, |
262965f5 CL |
1845 | }; |
1846 | ||
1847 | static struct rpc_xprt_ops xs_tcp_ops = { | |
12a80469 | 1848 | .reserve_xprt = xprt_reserve_xprt, |
e0ab53de | 1849 | .release_xprt = xs_tcp_release_xprt, |
45160d62 | 1850 | .rpcbind = rpcb_getport_async, |
92200412 | 1851 | .set_port = xs_set_port, |
e06799f9 | 1852 | .connect = xs_tcp_connect, |
02107148 CL |
1853 | .buf_alloc = rpc_malloc, |
1854 | .buf_free = rpc_free, | |
262965f5 | 1855 | .send_request = xs_tcp_send_request, |
fe3aca29 | 1856 | .set_retrans_timeout = xprt_set_retrans_timeout_def, |
e06799f9 | 1857 | .close = xs_tcp_shutdown, |
9903cd1c | 1858 | .destroy = xs_destroy, |
262ca07d | 1859 | .print_stats = xs_tcp_print_stats, |
a246b010 CL |
1860 | }; |
1861 | ||
3c341b0b | 1862 | static struct rpc_xprt *xs_setup_xprt(struct xprt_create *args, |
bc25571e | 1863 | unsigned int slot_table_size) |
c8541ecd CL |
1864 | { |
1865 | struct rpc_xprt *xprt; | |
ffc2e518 | 1866 | struct sock_xprt *new; |
c8541ecd | 1867 | |
96802a09 | 1868 | if (args->addrlen > sizeof(xprt->addr)) { |
46121cf7 | 1869 | dprintk("RPC: xs_setup_xprt: address too large\n"); |
c8541ecd CL |
1870 | return ERR_PTR(-EBADF); |
1871 | } | |
1872 | ||
ffc2e518 CL |
1873 | new = kzalloc(sizeof(*new), GFP_KERNEL); |
1874 | if (new == NULL) { | |
46121cf7 CL |
1875 | dprintk("RPC: xs_setup_xprt: couldn't allocate " |
1876 | "rpc_xprt\n"); | |
c8541ecd CL |
1877 | return ERR_PTR(-ENOMEM); |
1878 | } | |
ffc2e518 | 1879 | xprt = &new->xprt; |
c8541ecd CL |
1880 | |
1881 | xprt->max_reqs = slot_table_size; | |
1882 | xprt->slot = kcalloc(xprt->max_reqs, sizeof(struct rpc_rqst), GFP_KERNEL); | |
1883 | if (xprt->slot == NULL) { | |
1884 | kfree(xprt); | |
46121cf7 CL |
1885 | dprintk("RPC: xs_setup_xprt: couldn't allocate slot " |
1886 | "table\n"); | |
c8541ecd CL |
1887 | return ERR_PTR(-ENOMEM); |
1888 | } | |
1889 | ||
96802a09 FM |
1890 | memcpy(&xprt->addr, args->dstaddr, args->addrlen); |
1891 | xprt->addrlen = args->addrlen; | |
d3bc9a1d FM |
1892 | if (args->srcaddr) |
1893 | memcpy(&new->addr, args->srcaddr, args->addrlen); | |
c8541ecd CL |
1894 | |
1895 | return xprt; | |
1896 | } | |
1897 | ||
9903cd1c CL |
1898 | /** |
1899 | * xs_setup_udp - Set up transport to use a UDP socket | |
96802a09 | 1900 | * @args: rpc transport creation arguments |
9903cd1c CL |
1901 | * |
1902 | */ | |
483066d6 | 1903 | static struct rpc_xprt *xs_setup_udp(struct xprt_create *args) |
a246b010 | 1904 | { |
8f9d5b1a | 1905 | struct sockaddr *addr = args->dstaddr; |
c8541ecd | 1906 | struct rpc_xprt *xprt; |
c8475461 | 1907 | struct sock_xprt *transport; |
a246b010 | 1908 | |
96802a09 | 1909 | xprt = xs_setup_xprt(args, xprt_udp_slot_table_entries); |
c8541ecd CL |
1910 | if (IS_ERR(xprt)) |
1911 | return xprt; | |
c8475461 | 1912 | transport = container_of(xprt, struct sock_xprt, xprt); |
a246b010 | 1913 | |
ec739ef0 | 1914 | xprt->prot = IPPROTO_UDP; |
808012fb | 1915 | xprt->tsh_size = 0; |
a246b010 CL |
1916 | /* XXX: header size can vary due to auth type, IPv6, etc. */ |
1917 | xprt->max_payload = (1U << 16) - (MAX_HEADER << 3); | |
1918 | ||
03bf4b70 CL |
1919 | xprt->bind_timeout = XS_BIND_TO; |
1920 | xprt->connect_timeout = XS_UDP_CONN_TO; | |
1921 | xprt->reestablish_timeout = XS_UDP_REEST_TO; | |
1922 | xprt->idle_timeout = XS_IDLE_DISC_TO; | |
a246b010 | 1923 | |
262965f5 | 1924 | xprt->ops = &xs_udp_ops; |
a246b010 | 1925 | |
96802a09 FM |
1926 | if (args->timeout) |
1927 | xprt->timeout = *args->timeout; | |
a246b010 | 1928 | else |
9903cd1c | 1929 | xprt_set_timeout(&xprt->timeout, 5, 5 * HZ); |
a246b010 | 1930 | |
8f9d5b1a CL |
1931 | switch (addr->sa_family) { |
1932 | case AF_INET: | |
1933 | if (((struct sockaddr_in *)addr)->sin_port != htons(0)) | |
1934 | xprt_set_bound(xprt); | |
1935 | ||
1936 | INIT_DELAYED_WORK(&transport->connect_worker, | |
1937 | xs_udp_connect_worker4); | |
1938 | xs_format_ipv4_peer_addresses(xprt); | |
1939 | break; | |
1940 | case AF_INET6: | |
1941 | if (((struct sockaddr_in6 *)addr)->sin6_port != htons(0)) | |
1942 | xprt_set_bound(xprt); | |
1943 | ||
1944 | INIT_DELAYED_WORK(&transport->connect_worker, | |
1945 | xs_udp_connect_worker6); | |
1946 | xs_format_ipv6_peer_addresses(xprt); | |
1947 | break; | |
1948 | default: | |
1949 | kfree(xprt); | |
1950 | return ERR_PTR(-EAFNOSUPPORT); | |
1951 | } | |
1952 | ||
46121cf7 | 1953 | dprintk("RPC: set up transport to address %s\n", |
7559c7a2 | 1954 | xprt->address_strings[RPC_DISPLAY_ALL]); |
edb267a6 | 1955 | |
bc25571e TT |
1956 | if (try_module_get(THIS_MODULE)) |
1957 | return xprt; | |
1958 | ||
1959 | kfree(xprt->slot); | |
1960 | kfree(xprt); | |
1961 | return ERR_PTR(-EINVAL); | |
a246b010 CL |
1962 | } |
1963 | ||
9903cd1c CL |
1964 | /** |
1965 | * xs_setup_tcp - Set up transport to use a TCP socket | |
96802a09 | 1966 | * @args: rpc transport creation arguments |
9903cd1c CL |
1967 | * |
1968 | */ | |
483066d6 | 1969 | static struct rpc_xprt *xs_setup_tcp(struct xprt_create *args) |
a246b010 | 1970 | { |
8f9d5b1a | 1971 | struct sockaddr *addr = args->dstaddr; |
c8541ecd | 1972 | struct rpc_xprt *xprt; |
c8475461 | 1973 | struct sock_xprt *transport; |
a246b010 | 1974 | |
96802a09 | 1975 | xprt = xs_setup_xprt(args, xprt_tcp_slot_table_entries); |
c8541ecd CL |
1976 | if (IS_ERR(xprt)) |
1977 | return xprt; | |
c8475461 | 1978 | transport = container_of(xprt, struct sock_xprt, xprt); |
a246b010 | 1979 | |
ec739ef0 | 1980 | xprt->prot = IPPROTO_TCP; |
808012fb | 1981 | xprt->tsh_size = sizeof(rpc_fraghdr) / sizeof(u32); |
808012fb | 1982 | xprt->max_payload = RPC_MAX_FRAGMENT_SIZE; |
a246b010 | 1983 | |
03bf4b70 CL |
1984 | xprt->bind_timeout = XS_BIND_TO; |
1985 | xprt->connect_timeout = XS_TCP_CONN_TO; | |
1986 | xprt->reestablish_timeout = XS_TCP_INIT_REEST_TO; | |
1987 | xprt->idle_timeout = XS_IDLE_DISC_TO; | |
a246b010 | 1988 | |
262965f5 | 1989 | xprt->ops = &xs_tcp_ops; |
a246b010 | 1990 | |
96802a09 FM |
1991 | if (args->timeout) |
1992 | xprt->timeout = *args->timeout; | |
a246b010 | 1993 | else |
9903cd1c | 1994 | xprt_set_timeout(&xprt->timeout, 2, 60 * HZ); |
a246b010 | 1995 | |
8f9d5b1a CL |
1996 | switch (addr->sa_family) { |
1997 | case AF_INET: | |
1998 | if (((struct sockaddr_in *)addr)->sin_port != htons(0)) | |
1999 | xprt_set_bound(xprt); | |
2000 | ||
2001 | INIT_DELAYED_WORK(&transport->connect_worker, xs_tcp_connect_worker4); | |
2002 | xs_format_ipv4_peer_addresses(xprt); | |
2003 | break; | |
2004 | case AF_INET6: | |
2005 | if (((struct sockaddr_in6 *)addr)->sin6_port != htons(0)) | |
2006 | xprt_set_bound(xprt); | |
2007 | ||
2008 | INIT_DELAYED_WORK(&transport->connect_worker, xs_tcp_connect_worker6); | |
2009 | xs_format_ipv6_peer_addresses(xprt); | |
2010 | break; | |
2011 | default: | |
2012 | kfree(xprt); | |
2013 | return ERR_PTR(-EAFNOSUPPORT); | |
2014 | } | |
2015 | ||
46121cf7 | 2016 | dprintk("RPC: set up transport to address %s\n", |
7559c7a2 | 2017 | xprt->address_strings[RPC_DISPLAY_ALL]); |
edb267a6 | 2018 | |
bc25571e TT |
2019 | if (try_module_get(THIS_MODULE)) |
2020 | return xprt; | |
2021 | ||
2022 | kfree(xprt->slot); | |
2023 | kfree(xprt); | |
2024 | return ERR_PTR(-EINVAL); | |
a246b010 | 2025 | } |
282b32e1 | 2026 | |
bc25571e TT |
2027 | static struct xprt_class xs_udp_transport = { |
2028 | .list = LIST_HEAD_INIT(xs_udp_transport.list), | |
2029 | .name = "udp", | |
2030 | .owner = THIS_MODULE, | |
4fa016eb | 2031 | .ident = IPPROTO_UDP, |
bc25571e TT |
2032 | .setup = xs_setup_udp, |
2033 | }; | |
2034 | ||
2035 | static struct xprt_class xs_tcp_transport = { | |
2036 | .list = LIST_HEAD_INIT(xs_tcp_transport.list), | |
2037 | .name = "tcp", | |
2038 | .owner = THIS_MODULE, | |
4fa016eb | 2039 | .ident = IPPROTO_TCP, |
bc25571e TT |
2040 | .setup = xs_setup_tcp, |
2041 | }; | |
2042 | ||
282b32e1 | 2043 | /** |
bc25571e | 2044 | * init_socket_xprt - set up xprtsock's sysctls, register with RPC client |
282b32e1 CL |
2045 | * |
2046 | */ | |
2047 | int init_socket_xprt(void) | |
2048 | { | |
fbf76683 | 2049 | #ifdef RPC_DEBUG |
2b1bec5f | 2050 | if (!sunrpc_table_header) |
0b4d4147 | 2051 | sunrpc_table_header = register_sysctl_table(sunrpc_table); |
fbf76683 CL |
2052 | #endif |
2053 | ||
bc25571e TT |
2054 | xprt_register_transport(&xs_udp_transport); |
2055 | xprt_register_transport(&xs_tcp_transport); | |
2056 | ||
282b32e1 CL |
2057 | return 0; |
2058 | } | |
2059 | ||
2060 | /** | |
bc25571e | 2061 | * cleanup_socket_xprt - remove xprtsock's sysctls, unregister |
282b32e1 CL |
2062 | * |
2063 | */ | |
2064 | void cleanup_socket_xprt(void) | |
2065 | { | |
fbf76683 CL |
2066 | #ifdef RPC_DEBUG |
2067 | if (sunrpc_table_header) { | |
2068 | unregister_sysctl_table(sunrpc_table_header); | |
2069 | sunrpc_table_header = NULL; | |
2070 | } | |
2071 | #endif | |
bc25571e TT |
2072 | |
2073 | xprt_unregister_transport(&xs_udp_transport); | |
2074 | xprt_unregister_transport(&xs_tcp_transport); | |
282b32e1 | 2075 | } |