]>
Commit | Line | Data |
---|---|---|
a246b010 CL |
1 | /* |
2 | * linux/net/sunrpc/xprtsock.c | |
3 | * | |
4 | * Client-side transport implementation for sockets. | |
5 | * | |
113aa838 AC |
6 | * TCP callback races fixes (C) 1998 Red Hat |
7 | * TCP send fixes (C) 1998 Red Hat | |
a246b010 CL |
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> | |
176e21ee | 22 | #include <linux/string.h> |
a246b010 | 23 | #include <linux/slab.h> |
bc25571e | 24 | #include <linux/module.h> |
a246b010 | 25 | #include <linux/capability.h> |
a246b010 CL |
26 | #include <linux/pagemap.h> |
27 | #include <linux/errno.h> | |
28 | #include <linux/socket.h> | |
29 | #include <linux/in.h> | |
30 | #include <linux/net.h> | |
31 | #include <linux/mm.h> | |
176e21ee | 32 | #include <linux/un.h> |
a246b010 CL |
33 | #include <linux/udp.h> |
34 | #include <linux/tcp.h> | |
35 | #include <linux/sunrpc/clnt.h> | |
5976687a | 36 | #include <linux/sunrpc/addr.h> |
02107148 | 37 | #include <linux/sunrpc/sched.h> |
4cfc7e60 | 38 | #include <linux/sunrpc/svcsock.h> |
49c36fcc | 39 | #include <linux/sunrpc/xprtsock.h> |
a246b010 | 40 | #include <linux/file.h> |
9e00abc3 | 41 | #ifdef CONFIG_SUNRPC_BACKCHANNEL |
44b98efd RL |
42 | #include <linux/sunrpc/bc_xprt.h> |
43 | #endif | |
a246b010 CL |
44 | |
45 | #include <net/sock.h> | |
46 | #include <net/checksum.h> | |
47 | #include <net/udp.h> | |
48 | #include <net/tcp.h> | |
49 | ||
40b5ea0c TM |
50 | #include <trace/events/sunrpc.h> |
51 | ||
4cfc7e60 | 52 | #include "sunrpc.h" |
176e21ee CL |
53 | |
54 | static void xs_close(struct rpc_xprt *xprt); | |
55 | ||
c556b754 CL |
56 | /* |
57 | * xprtsock tunables | |
58 | */ | |
09acfea5 TM |
59 | static unsigned int xprt_udp_slot_table_entries = RPC_DEF_SLOT_TABLE; |
60 | static unsigned int xprt_tcp_slot_table_entries = RPC_MIN_SLOT_TABLE; | |
61 | static unsigned int xprt_max_tcp_slot_table_entries = RPC_MAX_SLOT_TABLE; | |
c556b754 | 62 | |
09acfea5 TM |
63 | static unsigned int xprt_min_resvport = RPC_DEF_MIN_RESVPORT; |
64 | static unsigned int xprt_max_resvport = RPC_DEF_MAX_RESVPORT; | |
c556b754 | 65 | |
54c09874 TM |
66 | #if IS_ENABLED(CONFIG_SUNRPC_DEBUG) |
67 | ||
7d1e8255 | 68 | #define XS_TCP_LINGER_TO (15U * HZ) |
25fe6142 | 69 | static unsigned int xs_tcp_fin_timeout __read_mostly = XS_TCP_LINGER_TO; |
7d1e8255 | 70 | |
fbf76683 CL |
71 | /* |
72 | * We can register our own files under /proc/sys/sunrpc by | |
73 | * calling register_sysctl_table() again. The files in that | |
74 | * directory become the union of all files registered there. | |
75 | * | |
76 | * We simply need to make sure that we don't collide with | |
77 | * someone else's file names! | |
78 | */ | |
79 | ||
fbf76683 CL |
80 | static unsigned int min_slot_table_size = RPC_MIN_SLOT_TABLE; |
81 | static unsigned int max_slot_table_size = RPC_MAX_SLOT_TABLE; | |
d9ba131d | 82 | static unsigned int max_tcp_slot_table_limit = RPC_MAX_SLOT_TABLE_LIMIT; |
fbf76683 CL |
83 | static unsigned int xprt_min_resvport_limit = RPC_MIN_RESVPORT; |
84 | static unsigned int xprt_max_resvport_limit = RPC_MAX_RESVPORT; | |
85 | ||
86 | static struct ctl_table_header *sunrpc_table_header; | |
87 | ||
88 | /* | |
89 | * FIXME: changing the UDP slot table size should also resize the UDP | |
90 | * socket buffers for existing UDP transports | |
91 | */ | |
fe2c6338 | 92 | static struct ctl_table xs_tunables_table[] = { |
fbf76683 | 93 | { |
fbf76683 CL |
94 | .procname = "udp_slot_table_entries", |
95 | .data = &xprt_udp_slot_table_entries, | |
96 | .maxlen = sizeof(unsigned int), | |
97 | .mode = 0644, | |
6d456111 | 98 | .proc_handler = proc_dointvec_minmax, |
fbf76683 CL |
99 | .extra1 = &min_slot_table_size, |
100 | .extra2 = &max_slot_table_size | |
101 | }, | |
102 | { | |
fbf76683 CL |
103 | .procname = "tcp_slot_table_entries", |
104 | .data = &xprt_tcp_slot_table_entries, | |
105 | .maxlen = sizeof(unsigned int), | |
106 | .mode = 0644, | |
6d456111 | 107 | .proc_handler = proc_dointvec_minmax, |
fbf76683 CL |
108 | .extra1 = &min_slot_table_size, |
109 | .extra2 = &max_slot_table_size | |
110 | }, | |
d9ba131d TM |
111 | { |
112 | .procname = "tcp_max_slot_table_entries", | |
113 | .data = &xprt_max_tcp_slot_table_entries, | |
114 | .maxlen = sizeof(unsigned int), | |
115 | .mode = 0644, | |
116 | .proc_handler = proc_dointvec_minmax, | |
117 | .extra1 = &min_slot_table_size, | |
118 | .extra2 = &max_tcp_slot_table_limit | |
119 | }, | |
fbf76683 | 120 | { |
fbf76683 CL |
121 | .procname = "min_resvport", |
122 | .data = &xprt_min_resvport, | |
123 | .maxlen = sizeof(unsigned int), | |
124 | .mode = 0644, | |
6d456111 | 125 | .proc_handler = proc_dointvec_minmax, |
fbf76683 | 126 | .extra1 = &xprt_min_resvport_limit, |
e08ea3a9 | 127 | .extra2 = &xprt_max_resvport |
fbf76683 CL |
128 | }, |
129 | { | |
fbf76683 CL |
130 | .procname = "max_resvport", |
131 | .data = &xprt_max_resvport, | |
132 | .maxlen = sizeof(unsigned int), | |
133 | .mode = 0644, | |
6d456111 | 134 | .proc_handler = proc_dointvec_minmax, |
e08ea3a9 | 135 | .extra1 = &xprt_min_resvport, |
fbf76683 CL |
136 | .extra2 = &xprt_max_resvport_limit |
137 | }, | |
25fe6142 TM |
138 | { |
139 | .procname = "tcp_fin_timeout", | |
140 | .data = &xs_tcp_fin_timeout, | |
141 | .maxlen = sizeof(xs_tcp_fin_timeout), | |
142 | .mode = 0644, | |
6d456111 | 143 | .proc_handler = proc_dointvec_jiffies, |
fbf76683 | 144 | }, |
f8572d8f | 145 | { }, |
fbf76683 CL |
146 | }; |
147 | ||
fe2c6338 | 148 | static struct ctl_table sunrpc_table[] = { |
fbf76683 | 149 | { |
fbf76683 CL |
150 | .procname = "sunrpc", |
151 | .mode = 0555, | |
152 | .child = xs_tunables_table | |
153 | }, | |
f8572d8f | 154 | { }, |
fbf76683 CL |
155 | }; |
156 | ||
157 | #endif | |
158 | ||
03bf4b70 CL |
159 | /* |
160 | * Wait duration for a reply from the RPC portmapper. | |
161 | */ | |
162 | #define XS_BIND_TO (60U * HZ) | |
163 | ||
164 | /* | |
165 | * Delay if a UDP socket connect error occurs. This is most likely some | |
166 | * kind of resource problem on the local host. | |
167 | */ | |
168 | #define XS_UDP_REEST_TO (2U * HZ) | |
169 | ||
170 | /* | |
171 | * The reestablish timeout allows clients to delay for a bit before attempting | |
172 | * to reconnect to a server that just dropped our connection. | |
173 | * | |
174 | * We implement an exponential backoff when trying to reestablish a TCP | |
175 | * transport connection with the server. Some servers like to drop a TCP | |
176 | * connection when they are overworked, so we start with a short timeout and | |
177 | * increase over time if the server is down or not responding. | |
178 | */ | |
179 | #define XS_TCP_INIT_REEST_TO (3U * HZ) | |
03bf4b70 CL |
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 | ||
f895b252 | 188 | #if IS_ENABLED(CONFIG_SUNRPC_DEBUG) |
a246b010 | 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 | ||
2118071d TM |
218 | static inline struct rpc_xprt *xprt_from_sock(struct sock *sk) |
219 | { | |
220 | return (struct rpc_xprt *) sk->sk_user_data; | |
221 | } | |
222 | ||
95392c59 CL |
223 | static inline struct sockaddr *xs_addr(struct rpc_xprt *xprt) |
224 | { | |
225 | return (struct sockaddr *) &xprt->addr; | |
226 | } | |
227 | ||
176e21ee CL |
228 | static inline struct sockaddr_un *xs_addr_un(struct rpc_xprt *xprt) |
229 | { | |
230 | return (struct sockaddr_un *) &xprt->addr; | |
231 | } | |
232 | ||
95392c59 | 233 | static inline struct sockaddr_in *xs_addr_in(struct rpc_xprt *xprt) |
edb267a6 | 234 | { |
95392c59 CL |
235 | return (struct sockaddr_in *) &xprt->addr; |
236 | } | |
237 | ||
238 | static inline struct sockaddr_in6 *xs_addr_in6(struct rpc_xprt *xprt) | |
239 | { | |
240 | return (struct sockaddr_in6 *) &xprt->addr; | |
241 | } | |
242 | ||
c877b849 | 243 | static void xs_format_common_peer_addresses(struct rpc_xprt *xprt) |
edb267a6 | 244 | { |
c877b849 | 245 | struct sockaddr *sap = xs_addr(xprt); |
9dc3b095 CL |
246 | struct sockaddr_in6 *sin6; |
247 | struct sockaddr_in *sin; | |
176e21ee | 248 | struct sockaddr_un *sun; |
c877b849 | 249 | char buf[128]; |
edb267a6 | 250 | |
9dc3b095 | 251 | switch (sap->sa_family) { |
176e21ee CL |
252 | case AF_LOCAL: |
253 | sun = xs_addr_un(xprt); | |
254 | strlcpy(buf, sun->sun_path, sizeof(buf)); | |
255 | xprt->address_strings[RPC_DISPLAY_ADDR] = | |
256 | kstrdup(buf, GFP_KERNEL); | |
257 | break; | |
9dc3b095 | 258 | case AF_INET: |
176e21ee CL |
259 | (void)rpc_ntop(sap, buf, sizeof(buf)); |
260 | xprt->address_strings[RPC_DISPLAY_ADDR] = | |
261 | kstrdup(buf, GFP_KERNEL); | |
9dc3b095 | 262 | sin = xs_addr_in(xprt); |
fc0b5791 | 263 | snprintf(buf, sizeof(buf), "%08x", ntohl(sin->sin_addr.s_addr)); |
9dc3b095 CL |
264 | break; |
265 | case AF_INET6: | |
176e21ee CL |
266 | (void)rpc_ntop(sap, buf, sizeof(buf)); |
267 | xprt->address_strings[RPC_DISPLAY_ADDR] = | |
268 | kstrdup(buf, GFP_KERNEL); | |
9dc3b095 | 269 | sin6 = xs_addr_in6(xprt); |
fc0b5791 | 270 | snprintf(buf, sizeof(buf), "%pi6", &sin6->sin6_addr); |
9dc3b095 CL |
271 | break; |
272 | default: | |
273 | BUG(); | |
756805e7 | 274 | } |
176e21ee | 275 | |
9dc3b095 | 276 | xprt->address_strings[RPC_DISPLAY_HEX_ADDR] = kstrdup(buf, GFP_KERNEL); |
edb267a6 CL |
277 | } |
278 | ||
9dc3b095 | 279 | static void xs_format_common_peer_ports(struct rpc_xprt *xprt) |
4b6473fb | 280 | { |
9dc3b095 CL |
281 | struct sockaddr *sap = xs_addr(xprt); |
282 | char buf[128]; | |
4b6473fb | 283 | |
81160e66 | 284 | snprintf(buf, sizeof(buf), "%u", rpc_get_port(sap)); |
c877b849 | 285 | xprt->address_strings[RPC_DISPLAY_PORT] = kstrdup(buf, GFP_KERNEL); |
4b6473fb | 286 | |
81160e66 | 287 | snprintf(buf, sizeof(buf), "%4hx", rpc_get_port(sap)); |
c877b849 CL |
288 | xprt->address_strings[RPC_DISPLAY_HEX_PORT] = kstrdup(buf, GFP_KERNEL); |
289 | } | |
4b6473fb | 290 | |
9dc3b095 CL |
291 | static void xs_format_peer_addresses(struct rpc_xprt *xprt, |
292 | const char *protocol, | |
293 | const char *netid) | |
c877b849 | 294 | { |
b454ae90 | 295 | xprt->address_strings[RPC_DISPLAY_PROTO] = protocol; |
b454ae90 | 296 | xprt->address_strings[RPC_DISPLAY_NETID] = netid; |
c877b849 | 297 | xs_format_common_peer_addresses(xprt); |
9dc3b095 | 298 | xs_format_common_peer_ports(xprt); |
edb267a6 | 299 | } |
4b6473fb | 300 | |
9dc3b095 | 301 | static void xs_update_peer_port(struct rpc_xprt *xprt) |
4b6473fb | 302 | { |
9dc3b095 CL |
303 | kfree(xprt->address_strings[RPC_DISPLAY_HEX_PORT]); |
304 | kfree(xprt->address_strings[RPC_DISPLAY_PORT]); | |
4417c8c4 | 305 | |
9dc3b095 | 306 | xs_format_common_peer_ports(xprt); |
edb267a6 CL |
307 | } |
308 | ||
309 | static void xs_free_peer_addresses(struct rpc_xprt *xprt) | |
310 | { | |
33e01dc7 CL |
311 | unsigned int i; |
312 | ||
313 | for (i = 0; i < RPC_DISPLAY_MAX; i++) | |
314 | switch (i) { | |
315 | case RPC_DISPLAY_PROTO: | |
316 | case RPC_DISPLAY_NETID: | |
317 | continue; | |
318 | default: | |
319 | kfree(xprt->address_strings[i]); | |
320 | } | |
edb267a6 CL |
321 | } |
322 | ||
b4b5cc85 CL |
323 | #define XS_SENDMSG_FLAGS (MSG_DONTWAIT | MSG_NOSIGNAL) |
324 | ||
24c5684b | 325 | static int xs_send_kvec(struct socket *sock, struct sockaddr *addr, int addrlen, struct kvec *vec, unsigned int base, int more) |
b4b5cc85 | 326 | { |
b4b5cc85 CL |
327 | struct msghdr msg = { |
328 | .msg_name = addr, | |
329 | .msg_namelen = addrlen, | |
24c5684b TM |
330 | .msg_flags = XS_SENDMSG_FLAGS | (more ? MSG_MORE : 0), |
331 | }; | |
332 | struct kvec iov = { | |
333 | .iov_base = vec->iov_base + base, | |
334 | .iov_len = vec->iov_len - base, | |
b4b5cc85 CL |
335 | }; |
336 | ||
24c5684b | 337 | if (iov.iov_len != 0) |
b4b5cc85 CL |
338 | return kernel_sendmsg(sock, &msg, &iov, 1, iov.iov_len); |
339 | return kernel_sendmsg(sock, &msg, NULL, 0, 0); | |
340 | } | |
341 | ||
f279cd00 | 342 | static int xs_send_pagedata(struct socket *sock, struct xdr_buf *xdr, unsigned int base, int more, bool zerocopy, int *sent_p) |
b4b5cc85 | 343 | { |
a6b31d18 TM |
344 | ssize_t (*do_sendpage)(struct socket *sock, struct page *page, |
345 | int offset, size_t size, int flags); | |
24c5684b TM |
346 | struct page **ppage; |
347 | unsigned int remainder; | |
f279cd00 | 348 | int err; |
24c5684b TM |
349 | |
350 | remainder = xdr->page_len - base; | |
351 | base += xdr->page_base; | |
352 | ppage = xdr->pages + (base >> PAGE_SHIFT); | |
353 | base &= ~PAGE_MASK; | |
a6b31d18 TM |
354 | do_sendpage = sock->ops->sendpage; |
355 | if (!zerocopy) | |
356 | do_sendpage = sock_no_sendpage; | |
24c5684b TM |
357 | for(;;) { |
358 | unsigned int len = min_t(unsigned int, PAGE_SIZE - base, remainder); | |
359 | int flags = XS_SENDMSG_FLAGS; | |
b4b5cc85 | 360 | |
24c5684b | 361 | remainder -= len; |
31303d6c | 362 | if (more) |
24c5684b | 363 | flags |= MSG_MORE; |
31303d6c TM |
364 | if (remainder != 0) |
365 | flags |= MSG_SENDPAGE_NOTLAST | MSG_MORE; | |
a6b31d18 | 366 | err = do_sendpage(sock, *ppage, base, len, flags); |
24c5684b TM |
367 | if (remainder == 0 || err != len) |
368 | break; | |
f279cd00 | 369 | *sent_p += err; |
24c5684b TM |
370 | ppage++; |
371 | base = 0; | |
372 | } | |
f279cd00 JB |
373 | if (err > 0) { |
374 | *sent_p += err; | |
375 | err = 0; | |
376 | } | |
377 | return err; | |
b4b5cc85 CL |
378 | } |
379 | ||
9903cd1c CL |
380 | /** |
381 | * xs_sendpages - write pages directly to a socket | |
382 | * @sock: socket to send on | |
383 | * @addr: UDP only -- address of destination | |
384 | * @addrlen: UDP only -- length of destination address | |
385 | * @xdr: buffer containing this request | |
386 | * @base: starting position in the buffer | |
a6b31d18 | 387 | * @zerocopy: true if it is safe to use sendpage() |
f279cd00 | 388 | * @sent_p: return the total number of bytes successfully queued for sending |
9903cd1c | 389 | * |
a246b010 | 390 | */ |
f279cd00 | 391 | static int xs_sendpages(struct socket *sock, struct sockaddr *addr, int addrlen, struct xdr_buf *xdr, unsigned int base, bool zerocopy, int *sent_p) |
a246b010 | 392 | { |
24c5684b | 393 | unsigned int remainder = xdr->len - base; |
f279cd00 JB |
394 | int err = 0; |
395 | int sent = 0; | |
a246b010 | 396 | |
262965f5 | 397 | if (unlikely(!sock)) |
fba91afb | 398 | return -ENOTSOCK; |
262965f5 | 399 | |
24c5684b TM |
400 | if (base != 0) { |
401 | addr = NULL; | |
402 | addrlen = 0; | |
403 | } | |
262965f5 | 404 | |
24c5684b TM |
405 | if (base < xdr->head[0].iov_len || addr != NULL) { |
406 | unsigned int len = xdr->head[0].iov_len - base; | |
407 | remainder -= len; | |
408 | err = xs_send_kvec(sock, addr, addrlen, &xdr->head[0], base, remainder != 0); | |
409 | if (remainder == 0 || err != len) | |
a246b010 | 410 | goto out; |
f279cd00 | 411 | *sent_p += err; |
a246b010 CL |
412 | base = 0; |
413 | } else | |
24c5684b | 414 | base -= xdr->head[0].iov_len; |
a246b010 | 415 | |
24c5684b TM |
416 | if (base < xdr->page_len) { |
417 | unsigned int len = xdr->page_len - base; | |
418 | remainder -= len; | |
f279cd00 JB |
419 | err = xs_send_pagedata(sock, xdr, base, remainder != 0, zerocopy, &sent); |
420 | *sent_p += sent; | |
421 | if (remainder == 0 || sent != len) | |
a246b010 CL |
422 | goto out; |
423 | base = 0; | |
24c5684b TM |
424 | } else |
425 | base -= xdr->page_len; | |
426 | ||
427 | if (base >= xdr->tail[0].iov_len) | |
f279cd00 | 428 | return 0; |
24c5684b | 429 | err = xs_send_kvec(sock, NULL, 0, &xdr->tail[0], base, 0); |
a246b010 | 430 | out: |
f279cd00 JB |
431 | if (err > 0) { |
432 | *sent_p += err; | |
433 | err = 0; | |
434 | } | |
435 | return err; | |
a246b010 CL |
436 | } |
437 | ||
b6ddf64f TM |
438 | static void xs_nospace_callback(struct rpc_task *task) |
439 | { | |
440 | struct sock_xprt *transport = container_of(task->tk_rqstp->rq_xprt, struct sock_xprt, xprt); | |
441 | ||
442 | transport->inet->sk_write_pending--; | |
b6ddf64f TM |
443 | } |
444 | ||
9903cd1c | 445 | /** |
262965f5 CL |
446 | * xs_nospace - place task on wait queue if transmit was incomplete |
447 | * @task: task to put to sleep | |
9903cd1c | 448 | * |
a246b010 | 449 | */ |
5e3771ce | 450 | static int xs_nospace(struct rpc_task *task) |
a246b010 | 451 | { |
262965f5 CL |
452 | struct rpc_rqst *req = task->tk_rqstp; |
453 | struct rpc_xprt *xprt = req->rq_xprt; | |
ee0ac0c2 | 454 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
06ea0bfe | 455 | struct sock *sk = transport->inet; |
24ca9a84 | 456 | int ret = -EAGAIN; |
a246b010 | 457 | |
46121cf7 | 458 | dprintk("RPC: %5u xmit incomplete (%u left of %u)\n", |
262965f5 CL |
459 | task->tk_pid, req->rq_slen - req->rq_bytes_sent, |
460 | req->rq_slen); | |
461 | ||
b6ddf64f TM |
462 | /* Protect against races with write_space */ |
463 | spin_lock_bh(&xprt->transport_lock); | |
464 | ||
465 | /* Don't race with disconnect */ | |
466 | if (xprt_connected(xprt)) { | |
13331a55 TM |
467 | /* wait for more buffer space */ |
468 | sk->sk_write_pending++; | |
469 | xprt_wait_for_buffer_space(task, xs_nospace_callback); | |
470 | } else | |
5e3771ce | 471 | ret = -ENOTCONN; |
262965f5 | 472 | |
b6ddf64f | 473 | spin_unlock_bh(&xprt->transport_lock); |
06ea0bfe TM |
474 | |
475 | /* Race breaker in case memory is freed before above code is called */ | |
476 | sk->sk_write_space(sk); | |
5e3771ce | 477 | return ret; |
262965f5 CL |
478 | } |
479 | ||
61677eee CL |
480 | /* |
481 | * Construct a stream transport record marker in @buf. | |
482 | */ | |
483 | static inline void xs_encode_stream_record_marker(struct xdr_buf *buf) | |
484 | { | |
485 | u32 reclen = buf->len - sizeof(rpc_fraghdr); | |
486 | rpc_fraghdr *base = buf->head[0].iov_base; | |
487 | *base = cpu_to_be32(RPC_LAST_STREAM_FRAGMENT | reclen); | |
488 | } | |
489 | ||
176e21ee CL |
490 | /** |
491 | * xs_local_send_request - write an RPC request to an AF_LOCAL socket | |
492 | * @task: RPC task that manages the state of an RPC request | |
493 | * | |
494 | * Return values: | |
495 | * 0: The request has been sent | |
496 | * EAGAIN: The socket was blocked, please call again later to | |
497 | * complete the request | |
498 | * ENOTCONN: Caller needs to invoke connect logic then call again | |
499 | * other: Some other error occured, the request was not sent | |
500 | */ | |
501 | static int xs_local_send_request(struct rpc_task *task) | |
502 | { | |
503 | struct rpc_rqst *req = task->tk_rqstp; | |
504 | struct rpc_xprt *xprt = req->rq_xprt; | |
505 | struct sock_xprt *transport = | |
506 | container_of(xprt, struct sock_xprt, xprt); | |
507 | struct xdr_buf *xdr = &req->rq_snd_buf; | |
508 | int status; | |
f279cd00 | 509 | int sent = 0; |
176e21ee CL |
510 | |
511 | xs_encode_stream_record_marker(&req->rq_snd_buf); | |
512 | ||
513 | xs_pktdump("packet data:", | |
514 | req->rq_svec->iov_base, req->rq_svec->iov_len); | |
515 | ||
f279cd00 JB |
516 | status = xs_sendpages(transport->sock, NULL, 0, xdr, req->rq_bytes_sent, |
517 | true, &sent); | |
176e21ee CL |
518 | dprintk("RPC: %s(%u) = %d\n", |
519 | __func__, xdr->len - req->rq_bytes_sent, status); | |
743c69e7 N |
520 | |
521 | if (status == -EAGAIN && sock_writeable(transport->inet)) | |
522 | status = -ENOBUFS; | |
523 | ||
f279cd00 JB |
524 | if (likely(sent > 0) || status == 0) { |
525 | req->rq_bytes_sent += sent; | |
526 | req->rq_xmit_bytes_sent += sent; | |
176e21ee CL |
527 | if (likely(req->rq_bytes_sent >= req->rq_slen)) { |
528 | req->rq_bytes_sent = 0; | |
529 | return 0; | |
530 | } | |
531 | status = -EAGAIN; | |
532 | } | |
533 | ||
534 | switch (status) { | |
3601c4a9 | 535 | case -ENOBUFS: |
b5872f0c | 536 | break; |
176e21ee CL |
537 | case -EAGAIN: |
538 | status = xs_nospace(task); | |
539 | break; | |
540 | default: | |
541 | dprintk("RPC: sendmsg returned unrecognized error %d\n", | |
542 | -status); | |
543 | case -EPIPE: | |
544 | xs_close(xprt); | |
545 | status = -ENOTCONN; | |
546 | } | |
547 | ||
548 | return status; | |
549 | } | |
550 | ||
262965f5 CL |
551 | /** |
552 | * xs_udp_send_request - write an RPC request to a UDP socket | |
553 | * @task: address of RPC task that manages the state of an RPC request | |
554 | * | |
555 | * Return values: | |
556 | * 0: The request has been sent | |
557 | * EAGAIN: The socket was blocked, please call again later to | |
558 | * complete the request | |
559 | * ENOTCONN: Caller needs to invoke connect logic then call again | |
25985edc | 560 | * other: Some other error occurred, the request was not sent |
262965f5 CL |
561 | */ |
562 | static int xs_udp_send_request(struct rpc_task *task) | |
563 | { | |
564 | struct rpc_rqst *req = task->tk_rqstp; | |
565 | struct rpc_xprt *xprt = req->rq_xprt; | |
ee0ac0c2 | 566 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
262965f5 | 567 | struct xdr_buf *xdr = &req->rq_snd_buf; |
f279cd00 | 568 | int sent = 0; |
262965f5 | 569 | int status; |
a246b010 | 570 | |
9903cd1c | 571 | xs_pktdump("packet data:", |
a246b010 CL |
572 | req->rq_svec->iov_base, |
573 | req->rq_svec->iov_len); | |
574 | ||
01d37c42 TM |
575 | if (!xprt_bound(xprt)) |
576 | return -ENOTCONN; | |
f279cd00 JB |
577 | status = xs_sendpages(transport->sock, xs_addr(xprt), xprt->addrlen, |
578 | xdr, req->rq_bytes_sent, true, &sent); | |
a246b010 | 579 | |
46121cf7 | 580 | dprintk("RPC: xs_udp_send_request(%u) = %d\n", |
262965f5 | 581 | xdr->len - req->rq_bytes_sent, status); |
a246b010 | 582 | |
3dedbb5c JB |
583 | /* firewall is blocking us, don't return -EAGAIN or we end up looping */ |
584 | if (status == -EPERM) | |
585 | goto process_status; | |
586 | ||
743c69e7 N |
587 | if (status == -EAGAIN && sock_writeable(transport->inet)) |
588 | status = -ENOBUFS; | |
589 | ||
f279cd00 JB |
590 | if (sent > 0 || status == 0) { |
591 | req->rq_xmit_bytes_sent += sent; | |
592 | if (sent >= req->rq_slen) | |
2199700f TM |
593 | return 0; |
594 | /* Still some bytes left; set up for a retry later. */ | |
262965f5 | 595 | status = -EAGAIN; |
2199700f | 596 | } |
a246b010 | 597 | |
3dedbb5c | 598 | process_status: |
262965f5 | 599 | switch (status) { |
fba91afb TM |
600 | case -ENOTSOCK: |
601 | status = -ENOTCONN; | |
602 | /* Should we call xs_close() here? */ | |
603 | break; | |
b6ddf64f | 604 | case -EAGAIN: |
5e3771ce | 605 | status = xs_nospace(task); |
b6ddf64f | 606 | break; |
262965f5 | 607 | case -ENETUNREACH: |
3601c4a9 | 608 | case -ENOBUFS: |
262965f5 | 609 | case -EPIPE: |
a246b010 | 610 | case -ECONNREFUSED: |
3dedbb5c | 611 | case -EPERM: |
a246b010 | 612 | /* When the server has died, an ICMP port unreachable message |
9903cd1c | 613 | * prompts ECONNREFUSED. */ |
13331a55 TM |
614 | break; |
615 | default: | |
616 | dprintk("RPC: sendmsg returned unrecognized error %d\n", | |
617 | -status); | |
a246b010 | 618 | } |
5fe46e9d | 619 | |
262965f5 | 620 | return status; |
a246b010 CL |
621 | } |
622 | ||
9903cd1c | 623 | /** |
262965f5 | 624 | * xs_tcp_send_request - write an RPC request to a TCP socket |
9903cd1c CL |
625 | * @task: address of RPC task that manages the state of an RPC request |
626 | * | |
627 | * Return values: | |
262965f5 CL |
628 | * 0: The request has been sent |
629 | * EAGAIN: The socket was blocked, please call again later to | |
630 | * complete the request | |
631 | * ENOTCONN: Caller needs to invoke connect logic then call again | |
25985edc | 632 | * other: Some other error occurred, the request was not sent |
9903cd1c CL |
633 | * |
634 | * XXX: In the case of soft timeouts, should we eventually give up | |
262965f5 | 635 | * if sendmsg is not able to make progress? |
9903cd1c | 636 | */ |
262965f5 | 637 | static int xs_tcp_send_request(struct rpc_task *task) |
a246b010 CL |
638 | { |
639 | struct rpc_rqst *req = task->tk_rqstp; | |
640 | struct rpc_xprt *xprt = req->rq_xprt; | |
ee0ac0c2 | 641 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
262965f5 | 642 | struct xdr_buf *xdr = &req->rq_snd_buf; |
a6b31d18 | 643 | bool zerocopy = true; |
9ffadfbc | 644 | bool vm_wait = false; |
b595bb15 | 645 | int status; |
f279cd00 | 646 | int sent; |
a246b010 | 647 | |
61677eee | 648 | xs_encode_stream_record_marker(&req->rq_snd_buf); |
a246b010 | 649 | |
262965f5 CL |
650 | xs_pktdump("packet data:", |
651 | req->rq_svec->iov_base, | |
652 | req->rq_svec->iov_len); | |
a6b31d18 TM |
653 | /* Don't use zero copy if this is a resend. If the RPC call |
654 | * completes while the socket holds a reference to the pages, | |
655 | * then we may end up resending corrupted data. | |
656 | */ | |
657 | if (task->tk_flags & RPC_TASK_SENT) | |
658 | zerocopy = false; | |
a246b010 CL |
659 | |
660 | /* Continue transmitting the packet/record. We must be careful | |
661 | * to cope with writespace callbacks arriving _after_ we have | |
262965f5 | 662 | * called sendmsg(). */ |
a246b010 | 663 | while (1) { |
f279cd00 JB |
664 | sent = 0; |
665 | status = xs_sendpages(transport->sock, NULL, 0, xdr, | |
666 | req->rq_bytes_sent, zerocopy, &sent); | |
a246b010 | 667 | |
46121cf7 | 668 | dprintk("RPC: xs_tcp_send_request(%u) = %d\n", |
262965f5 | 669 | xdr->len - req->rq_bytes_sent, status); |
a246b010 | 670 | |
262965f5 CL |
671 | /* If we've sent the entire packet, immediately |
672 | * reset the count of bytes sent. */ | |
f279cd00 JB |
673 | req->rq_bytes_sent += sent; |
674 | req->rq_xmit_bytes_sent += sent; | |
262965f5 CL |
675 | if (likely(req->rq_bytes_sent >= req->rq_slen)) { |
676 | req->rq_bytes_sent = 0; | |
677 | return 0; | |
678 | } | |
a246b010 | 679 | |
9ffadfbc TM |
680 | WARN_ON_ONCE(sent == 0 && status == 0); |
681 | ||
682 | if (status == -EAGAIN ) { | |
683 | /* | |
684 | * Return EAGAIN if we're sure we're hitting the | |
685 | * socket send buffer limits. | |
686 | */ | |
687 | if (test_bit(SOCK_NOSPACE, &transport->sock->flags)) | |
688 | break; | |
689 | /* | |
690 | * Did we hit a memory allocation failure? | |
691 | */ | |
692 | if (sent == 0) { | |
693 | status = -ENOBUFS; | |
694 | if (vm_wait) | |
695 | break; | |
696 | /* Retry, knowing now that we're below the | |
697 | * socket send buffer limit | |
698 | */ | |
699 | vm_wait = true; | |
700 | } | |
701 | continue; | |
702 | } | |
f580dd04 TM |
703 | if (status < 0) |
704 | break; | |
9ffadfbc | 705 | vm_wait = false; |
a246b010 CL |
706 | } |
707 | ||
262965f5 | 708 | switch (status) { |
fba91afb TM |
709 | case -ENOTSOCK: |
710 | status = -ENOTCONN; | |
711 | /* Should we call xs_close() here? */ | |
712 | break; | |
262965f5 | 713 | case -EAGAIN: |
5e3771ce | 714 | status = xs_nospace(task); |
262965f5 | 715 | break; |
262965f5 | 716 | case -ECONNRESET: |
2a9e1cfa | 717 | case -ECONNREFUSED: |
262965f5 | 718 | case -ENOTCONN: |
3913c78c | 719 | case -EADDRINUSE: |
b5872f0c | 720 | case -ENOBUFS: |
b9d2bb2e | 721 | case -EPIPE: |
13331a55 TM |
722 | break; |
723 | default: | |
724 | dprintk("RPC: sendmsg returned unrecognized error %d\n", | |
725 | -status); | |
a246b010 | 726 | } |
5fe46e9d | 727 | |
a246b010 CL |
728 | return status; |
729 | } | |
730 | ||
e0ab53de TM |
731 | /** |
732 | * xs_tcp_release_xprt - clean up after a tcp transmission | |
733 | * @xprt: transport | |
734 | * @task: rpc task | |
735 | * | |
736 | * This cleans up if an error causes us to abort the transmission of a request. | |
737 | * In this case, the socket may need to be reset in order to avoid confusing | |
738 | * the server. | |
739 | */ | |
740 | static void xs_tcp_release_xprt(struct rpc_xprt *xprt, struct rpc_task *task) | |
741 | { | |
742 | struct rpc_rqst *req; | |
743 | ||
744 | if (task != xprt->snd_task) | |
745 | return; | |
746 | if (task == NULL) | |
747 | goto out_release; | |
748 | req = task->tk_rqstp; | |
43cedbf0 TM |
749 | if (req == NULL) |
750 | goto out_release; | |
e0ab53de TM |
751 | if (req->rq_bytes_sent == 0) |
752 | goto out_release; | |
753 | if (req->rq_bytes_sent == req->rq_snd_buf.len) | |
754 | goto out_release; | |
a4f0835c | 755 | set_bit(XPRT_CLOSE_WAIT, &xprt->state); |
e0ab53de TM |
756 | out_release: |
757 | xprt_release_xprt(xprt, task); | |
758 | } | |
759 | ||
2a9e1cfa TM |
760 | static void xs_save_old_callbacks(struct sock_xprt *transport, struct sock *sk) |
761 | { | |
762 | transport->old_data_ready = sk->sk_data_ready; | |
763 | transport->old_state_change = sk->sk_state_change; | |
764 | transport->old_write_space = sk->sk_write_space; | |
2118071d | 765 | transport->old_error_report = sk->sk_error_report; |
2a9e1cfa TM |
766 | } |
767 | ||
768 | static void xs_restore_old_callbacks(struct sock_xprt *transport, struct sock *sk) | |
769 | { | |
770 | sk->sk_data_ready = transport->old_data_ready; | |
771 | sk->sk_state_change = transport->old_state_change; | |
772 | sk->sk_write_space = transport->old_write_space; | |
2118071d TM |
773 | sk->sk_error_report = transport->old_error_report; |
774 | } | |
775 | ||
42d42a5b TM |
776 | static void xs_sock_reset_state_flags(struct rpc_xprt *xprt) |
777 | { | |
778 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); | |
779 | ||
780 | clear_bit(XPRT_SOCK_DATA_READY, &transport->sock_state); | |
781 | } | |
782 | ||
b70ae915 TM |
783 | static void xs_sock_reset_connection_flags(struct rpc_xprt *xprt) |
784 | { | |
785 | smp_mb__before_atomic(); | |
786 | clear_bit(XPRT_CLOSE_WAIT, &xprt->state); | |
787 | clear_bit(XPRT_CLOSING, &xprt->state); | |
42d42a5b | 788 | xs_sock_reset_state_flags(xprt); |
b70ae915 TM |
789 | smp_mb__after_atomic(); |
790 | } | |
791 | ||
792 | static void xs_sock_mark_closed(struct rpc_xprt *xprt) | |
793 | { | |
794 | xs_sock_reset_connection_flags(xprt); | |
795 | /* Mark transport as closed and wake up all pending tasks */ | |
796 | xprt_disconnect_done(xprt); | |
797 | } | |
798 | ||
2118071d TM |
799 | /** |
800 | * xs_error_report - callback to handle TCP socket state errors | |
801 | * @sk: socket | |
802 | * | |
803 | * Note: we don't call sock_error() since there may be a rpc_task | |
804 | * using the socket, and so we don't want to clear sk->sk_err. | |
805 | */ | |
806 | static void xs_error_report(struct sock *sk) | |
807 | { | |
808 | struct rpc_xprt *xprt; | |
809 | int err; | |
810 | ||
811 | read_lock_bh(&sk->sk_callback_lock); | |
812 | if (!(xprt = xprt_from_sock(sk))) | |
813 | goto out; | |
814 | ||
815 | err = -sk->sk_err; | |
816 | if (err == 0) | |
817 | goto out; | |
b70ae915 TM |
818 | /* Is this a reset event? */ |
819 | if (sk->sk_state == TCP_CLOSE) | |
820 | xs_sock_mark_closed(xprt); | |
2118071d TM |
821 | dprintk("RPC: xs_error_report client %p, error=%d...\n", |
822 | xprt, -err); | |
e8353c76 | 823 | trace_rpc_socket_error(xprt, sk->sk_socket, err); |
2118071d TM |
824 | xprt_wake_pending_tasks(xprt, err); |
825 | out: | |
826 | read_unlock_bh(&sk->sk_callback_lock); | |
2a9e1cfa TM |
827 | } |
828 | ||
fe315e76 | 829 | static void xs_reset_transport(struct sock_xprt *transport) |
a246b010 | 830 | { |
ee0ac0c2 CL |
831 | struct socket *sock = transport->sock; |
832 | struct sock *sk = transport->inet; | |
6cc7e908 | 833 | struct rpc_xprt *xprt = &transport->xprt; |
a246b010 | 834 | |
fe315e76 CL |
835 | if (sk == NULL) |
836 | return; | |
9903cd1c | 837 | |
264d1df3 JL |
838 | if (atomic_read(&transport->xprt.swapper)) |
839 | sk_clear_memalloc(sk); | |
840 | ||
09939204 TM |
841 | kernel_sock_shutdown(sock, SHUT_RDWR); |
842 | ||
edc1b01c | 843 | mutex_lock(&transport->recv_mutex); |
a246b010 | 844 | write_lock_bh(&sk->sk_callback_lock); |
ee0ac0c2 CL |
845 | transport->inet = NULL; |
846 | transport->sock = NULL; | |
a246b010 | 847 | |
9903cd1c | 848 | sk->sk_user_data = NULL; |
2a9e1cfa TM |
849 | |
850 | xs_restore_old_callbacks(transport, sk); | |
0c78789e | 851 | xprt_clear_connected(xprt); |
a246b010 | 852 | write_unlock_bh(&sk->sk_callback_lock); |
6cc7e908 | 853 | xs_sock_reset_connection_flags(xprt); |
edc1b01c | 854 | mutex_unlock(&transport->recv_mutex); |
a246b010 | 855 | |
6cc7e908 | 856 | trace_rpc_socket_close(xprt, sock); |
a246b010 | 857 | sock_release(sock); |
fe315e76 CL |
858 | } |
859 | ||
860 | /** | |
861 | * xs_close - close a socket | |
862 | * @xprt: transport | |
863 | * | |
864 | * This is used when all requests are complete; ie, no DRC state remains | |
865 | * on the server we want to save. | |
f75e6745 TM |
866 | * |
867 | * The caller _must_ be holding XPRT_LOCKED in order to avoid issues with | |
868 | * xs_reset_transport() zeroing the socket from underneath a writer. | |
fe315e76 CL |
869 | */ |
870 | static void xs_close(struct rpc_xprt *xprt) | |
871 | { | |
872 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); | |
873 | ||
874 | dprintk("RPC: xs_close xprt %p\n", xprt); | |
875 | ||
876 | xs_reset_transport(transport); | |
61d0a8e6 | 877 | xprt->reestablish_timeout = 0; |
fe315e76 | 878 | |
62da3b24 | 879 | xprt_disconnect_done(xprt); |
a246b010 CL |
880 | } |
881 | ||
4a068258 CL |
882 | static void xs_inject_disconnect(struct rpc_xprt *xprt) |
883 | { | |
884 | dprintk("RPC: injecting transport disconnect on xprt=%p\n", | |
885 | xprt); | |
886 | xprt_disconnect_done(xprt); | |
887 | } | |
888 | ||
315f3812 KM |
889 | static void xs_xprt_free(struct rpc_xprt *xprt) |
890 | { | |
891 | xs_free_peer_addresses(xprt); | |
892 | xprt_free(xprt); | |
893 | } | |
894 | ||
9903cd1c CL |
895 | /** |
896 | * xs_destroy - prepare to shutdown a transport | |
897 | * @xprt: doomed transport | |
898 | * | |
899 | */ | |
900 | static void xs_destroy(struct rpc_xprt *xprt) | |
a246b010 | 901 | { |
03c78827 TM |
902 | struct sock_xprt *transport = container_of(xprt, |
903 | struct sock_xprt, xprt); | |
46121cf7 | 904 | dprintk("RPC: xs_destroy xprt %p\n", xprt); |
9903cd1c | 905 | |
03c78827 | 906 | cancel_delayed_work_sync(&transport->connect_worker); |
a1311d87 | 907 | xs_close(xprt); |
edc1b01c | 908 | cancel_work_sync(&transport->recv_worker); |
315f3812 | 909 | xs_xprt_free(xprt); |
a1311d87 | 910 | module_put(THIS_MODULE); |
a246b010 CL |
911 | } |
912 | ||
176e21ee CL |
913 | static int xs_local_copy_to_xdr(struct xdr_buf *xdr, struct sk_buff *skb) |
914 | { | |
915 | struct xdr_skb_reader desc = { | |
916 | .skb = skb, | |
917 | .offset = sizeof(rpc_fraghdr), | |
918 | .count = skb->len - sizeof(rpc_fraghdr), | |
919 | }; | |
920 | ||
921 | if (xdr_partial_copy_from_skb(xdr, 0, &desc, xdr_skb_read_bits) < 0) | |
922 | return -1; | |
923 | if (desc.count) | |
924 | return -1; | |
925 | return 0; | |
926 | } | |
927 | ||
928 | /** | |
a2648094 TM |
929 | * xs_local_data_read_skb |
930 | * @xprt: transport | |
931 | * @sk: socket | |
932 | * @skb: skbuff | |
176e21ee CL |
933 | * |
934 | * Currently this assumes we can read the whole reply in a single gulp. | |
935 | */ | |
a2648094 TM |
936 | static void xs_local_data_read_skb(struct rpc_xprt *xprt, |
937 | struct sock *sk, | |
938 | struct sk_buff *skb) | |
176e21ee CL |
939 | { |
940 | struct rpc_task *task; | |
176e21ee | 941 | struct rpc_rqst *rovr; |
a2648094 | 942 | int repsize, copied; |
176e21ee CL |
943 | u32 _xid; |
944 | __be32 *xp; | |
945 | ||
176e21ee CL |
946 | repsize = skb->len - sizeof(rpc_fraghdr); |
947 | if (repsize < 4) { | |
948 | dprintk("RPC: impossible RPC reply size %d\n", repsize); | |
a2648094 | 949 | return; |
176e21ee CL |
950 | } |
951 | ||
952 | /* Copy the XID from the skb... */ | |
953 | xp = skb_header_pointer(skb, sizeof(rpc_fraghdr), sizeof(_xid), &_xid); | |
954 | if (xp == NULL) | |
a2648094 | 955 | return; |
176e21ee CL |
956 | |
957 | /* Look up and lock the request corresponding to the given XID */ | |
a2648094 | 958 | spin_lock_bh(&xprt->transport_lock); |
176e21ee CL |
959 | rovr = xprt_lookup_rqst(xprt, *xp); |
960 | if (!rovr) | |
961 | goto out_unlock; | |
962 | task = rovr->rq_task; | |
963 | ||
964 | copied = rovr->rq_private_buf.buflen; | |
965 | if (copied > repsize) | |
966 | copied = repsize; | |
967 | ||
968 | if (xs_local_copy_to_xdr(&rovr->rq_private_buf, skb)) { | |
969 | dprintk("RPC: sk_buff copy failed\n"); | |
970 | goto out_unlock; | |
971 | } | |
972 | ||
973 | xprt_complete_rqst(task, copied); | |
974 | ||
975 | out_unlock: | |
a2648094 TM |
976 | spin_unlock_bh(&xprt->transport_lock); |
977 | } | |
978 | ||
979 | static void xs_local_data_receive(struct sock_xprt *transport) | |
980 | { | |
981 | struct sk_buff *skb; | |
982 | struct sock *sk; | |
983 | int err; | |
984 | ||
985 | mutex_lock(&transport->recv_mutex); | |
986 | sk = transport->inet; | |
987 | if (sk == NULL) | |
988 | goto out; | |
989 | for (;;) { | |
990 | skb = skb_recv_datagram(sk, 0, 1, &err); | |
42d42a5b TM |
991 | if (skb != NULL) { |
992 | xs_local_data_read_skb(&transport->xprt, sk, skb); | |
993 | skb_free_datagram(sk, skb); | |
994 | continue; | |
995 | } | |
996 | if (!test_and_clear_bit(XPRT_SOCK_DATA_READY, &transport->sock_state)) | |
a2648094 | 997 | break; |
a2648094 TM |
998 | } |
999 | out: | |
1000 | mutex_unlock(&transport->recv_mutex); | |
1001 | } | |
1002 | ||
1003 | static void xs_local_data_receive_workfn(struct work_struct *work) | |
1004 | { | |
1005 | struct sock_xprt *transport = | |
1006 | container_of(work, struct sock_xprt, recv_worker); | |
1007 | xs_local_data_receive(transport); | |
176e21ee CL |
1008 | } |
1009 | ||
9903cd1c | 1010 | /** |
f9b2ee71 TM |
1011 | * xs_udp_data_read_skb - receive callback for UDP sockets |
1012 | * @xprt: transport | |
1013 | * @sk: socket | |
1014 | * @skb: skbuff | |
9903cd1c | 1015 | * |
a246b010 | 1016 | */ |
f9b2ee71 TM |
1017 | static void xs_udp_data_read_skb(struct rpc_xprt *xprt, |
1018 | struct sock *sk, | |
1019 | struct sk_buff *skb) | |
a246b010 | 1020 | { |
9903cd1c | 1021 | struct rpc_task *task; |
a246b010 | 1022 | struct rpc_rqst *rovr; |
f9b2ee71 | 1023 | int repsize, copied; |
d8ed029d AD |
1024 | u32 _xid; |
1025 | __be32 *xp; | |
a246b010 | 1026 | |
1da8c681 | 1027 | repsize = skb->len; |
a246b010 | 1028 | if (repsize < 4) { |
46121cf7 | 1029 | dprintk("RPC: impossible RPC reply size %d!\n", repsize); |
f9b2ee71 | 1030 | return; |
a246b010 CL |
1031 | } |
1032 | ||
1033 | /* Copy the XID from the skb... */ | |
1da8c681 | 1034 | xp = skb_header_pointer(skb, 0, sizeof(_xid), &_xid); |
a246b010 | 1035 | if (xp == NULL) |
f9b2ee71 | 1036 | return; |
a246b010 CL |
1037 | |
1038 | /* Look up and lock the request corresponding to the given XID */ | |
f9b2ee71 | 1039 | spin_lock_bh(&xprt->transport_lock); |
a246b010 CL |
1040 | rovr = xprt_lookup_rqst(xprt, *xp); |
1041 | if (!rovr) | |
1042 | goto out_unlock; | |
1043 | task = rovr->rq_task; | |
1044 | ||
a246b010 CL |
1045 | if ((copied = rovr->rq_private_buf.buflen) > repsize) |
1046 | copied = repsize; | |
1047 | ||
1048 | /* Suck it into the iovec, verify checksum if not done by hw. */ | |
1781f7f5 | 1049 | if (csum_partial_copy_to_xdr(&rovr->rq_private_buf, skb)) { |
02c22347 | 1050 | __UDPX_INC_STATS(sk, UDP_MIB_INERRORS); |
a246b010 | 1051 | goto out_unlock; |
1781f7f5 HX |
1052 | } |
1053 | ||
02c22347 | 1054 | __UDPX_INC_STATS(sk, UDP_MIB_INDATAGRAMS); |
a246b010 | 1055 | |
6a24dfb6 | 1056 | xprt_adjust_cwnd(xprt, task, copied); |
1570c1e4 | 1057 | xprt_complete_rqst(task, copied); |
a246b010 CL |
1058 | |
1059 | out_unlock: | |
f9b2ee71 TM |
1060 | spin_unlock_bh(&xprt->transport_lock); |
1061 | } | |
1062 | ||
1063 | static void xs_udp_data_receive(struct sock_xprt *transport) | |
1064 | { | |
1065 | struct sk_buff *skb; | |
1066 | struct sock *sk; | |
1067 | int err; | |
1068 | ||
1069 | mutex_lock(&transport->recv_mutex); | |
1070 | sk = transport->inet; | |
1071 | if (sk == NULL) | |
1072 | goto out; | |
1073 | for (;;) { | |
1074 | skb = skb_recv_datagram(sk, 0, 1, &err); | |
42d42a5b TM |
1075 | if (skb != NULL) { |
1076 | xs_udp_data_read_skb(&transport->xprt, sk, skb); | |
a41bd25a | 1077 | skb_free_datagram_locked(sk, skb); |
42d42a5b TM |
1078 | continue; |
1079 | } | |
1080 | if (!test_and_clear_bit(XPRT_SOCK_DATA_READY, &transport->sock_state)) | |
f9b2ee71 | 1081 | break; |
f9b2ee71 TM |
1082 | } |
1083 | out: | |
1084 | mutex_unlock(&transport->recv_mutex); | |
1085 | } | |
1086 | ||
1087 | static void xs_udp_data_receive_workfn(struct work_struct *work) | |
1088 | { | |
1089 | struct sock_xprt *transport = | |
1090 | container_of(work, struct sock_xprt, recv_worker); | |
1091 | xs_udp_data_receive(transport); | |
1092 | } | |
1093 | ||
1094 | /** | |
1095 | * xs_data_ready - "data ready" callback for UDP sockets | |
1096 | * @sk: socket with data to read | |
1097 | * | |
1098 | */ | |
1099 | static void xs_data_ready(struct sock *sk) | |
1100 | { | |
1101 | struct rpc_xprt *xprt; | |
1102 | ||
1103 | read_lock_bh(&sk->sk_callback_lock); | |
1104 | dprintk("RPC: xs_data_ready...\n"); | |
1105 | xprt = xprt_from_sock(sk); | |
1106 | if (xprt != NULL) { | |
1107 | struct sock_xprt *transport = container_of(xprt, | |
1108 | struct sock_xprt, xprt); | |
5157b956 TM |
1109 | transport->old_data_ready(sk); |
1110 | /* Any data means we had a useful conversation, so | |
1111 | * then we don't need to delay the next reconnect | |
1112 | */ | |
1113 | if (xprt->reestablish_timeout) | |
1114 | xprt->reestablish_timeout = 0; | |
42d42a5b | 1115 | if (!test_and_set_bit(XPRT_SOCK_DATA_READY, &transport->sock_state)) |
40a5f1b1 | 1116 | queue_work(xprtiod_workqueue, &transport->recv_worker); |
f9b2ee71 | 1117 | } |
f064af1e | 1118 | read_unlock_bh(&sk->sk_callback_lock); |
a246b010 CL |
1119 | } |
1120 | ||
a519fc7a TM |
1121 | /* |
1122 | * Helper function to force a TCP close if the server is sending | |
1123 | * junk and/or it has put us in CLOSE_WAIT | |
1124 | */ | |
1125 | static void xs_tcp_force_close(struct rpc_xprt *xprt) | |
1126 | { | |
a519fc7a TM |
1127 | xprt_force_disconnect(xprt); |
1128 | } | |
1129 | ||
dd456471 | 1130 | static inline void xs_tcp_read_fraghdr(struct rpc_xprt *xprt, struct xdr_skb_reader *desc) |
a246b010 | 1131 | { |
51971139 | 1132 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
a246b010 CL |
1133 | size_t len, used; |
1134 | char *p; | |
1135 | ||
51971139 CL |
1136 | p = ((char *) &transport->tcp_fraghdr) + transport->tcp_offset; |
1137 | len = sizeof(transport->tcp_fraghdr) - transport->tcp_offset; | |
9d292316 | 1138 | used = xdr_skb_read_bits(desc, p, len); |
51971139 | 1139 | transport->tcp_offset += used; |
a246b010 CL |
1140 | if (used != len) |
1141 | return; | |
808012fb | 1142 | |
51971139 CL |
1143 | transport->tcp_reclen = ntohl(transport->tcp_fraghdr); |
1144 | if (transport->tcp_reclen & RPC_LAST_STREAM_FRAGMENT) | |
e136d092 | 1145 | transport->tcp_flags |= TCP_RCV_LAST_FRAG; |
a246b010 | 1146 | else |
e136d092 | 1147 | transport->tcp_flags &= ~TCP_RCV_LAST_FRAG; |
51971139 | 1148 | transport->tcp_reclen &= RPC_FRAGMENT_SIZE_MASK; |
808012fb | 1149 | |
e136d092 | 1150 | transport->tcp_flags &= ~TCP_RCV_COPY_FRAGHDR; |
51971139 | 1151 | transport->tcp_offset = 0; |
808012fb | 1152 | |
a246b010 | 1153 | /* Sanity check of the record length */ |
18dca02a | 1154 | if (unlikely(transport->tcp_reclen < 8)) { |
46121cf7 | 1155 | dprintk("RPC: invalid TCP record fragment length\n"); |
a519fc7a | 1156 | xs_tcp_force_close(xprt); |
9903cd1c | 1157 | return; |
a246b010 | 1158 | } |
46121cf7 | 1159 | dprintk("RPC: reading TCP record fragment of length %d\n", |
51971139 | 1160 | transport->tcp_reclen); |
a246b010 CL |
1161 | } |
1162 | ||
51971139 | 1163 | static void xs_tcp_check_fraghdr(struct sock_xprt *transport) |
a246b010 | 1164 | { |
51971139 | 1165 | if (transport->tcp_offset == transport->tcp_reclen) { |
e136d092 | 1166 | transport->tcp_flags |= TCP_RCV_COPY_FRAGHDR; |
51971139 | 1167 | transport->tcp_offset = 0; |
e136d092 CL |
1168 | if (transport->tcp_flags & TCP_RCV_LAST_FRAG) { |
1169 | transport->tcp_flags &= ~TCP_RCV_COPY_DATA; | |
1170 | transport->tcp_flags |= TCP_RCV_COPY_XID; | |
51971139 | 1171 | transport->tcp_copied = 0; |
a246b010 CL |
1172 | } |
1173 | } | |
1174 | } | |
1175 | ||
dd456471 | 1176 | static inline void xs_tcp_read_xid(struct sock_xprt *transport, struct xdr_skb_reader *desc) |
a246b010 CL |
1177 | { |
1178 | size_t len, used; | |
1179 | char *p; | |
1180 | ||
51971139 | 1181 | len = sizeof(transport->tcp_xid) - transport->tcp_offset; |
46121cf7 | 1182 | dprintk("RPC: reading XID (%Zu bytes)\n", len); |
51971139 | 1183 | p = ((char *) &transport->tcp_xid) + transport->tcp_offset; |
9d292316 | 1184 | used = xdr_skb_read_bits(desc, p, len); |
51971139 | 1185 | transport->tcp_offset += used; |
a246b010 CL |
1186 | if (used != len) |
1187 | return; | |
e136d092 | 1188 | transport->tcp_flags &= ~TCP_RCV_COPY_XID; |
f4a2e418 | 1189 | transport->tcp_flags |= TCP_RCV_READ_CALLDIR; |
51971139 | 1190 | transport->tcp_copied = 4; |
18dca02a RL |
1191 | dprintk("RPC: reading %s XID %08x\n", |
1192 | (transport->tcp_flags & TCP_RPC_REPLY) ? "reply for" | |
1193 | : "request with", | |
51971139 CL |
1194 | ntohl(transport->tcp_xid)); |
1195 | xs_tcp_check_fraghdr(transport); | |
a246b010 CL |
1196 | } |
1197 | ||
18dca02a RL |
1198 | static inline void xs_tcp_read_calldir(struct sock_xprt *transport, |
1199 | struct xdr_skb_reader *desc) | |
a246b010 | 1200 | { |
18dca02a RL |
1201 | size_t len, used; |
1202 | u32 offset; | |
b76ce561 | 1203 | char *p; |
18dca02a RL |
1204 | |
1205 | /* | |
1206 | * We want transport->tcp_offset to be 8 at the end of this routine | |
1207 | * (4 bytes for the xid and 4 bytes for the call/reply flag). | |
1208 | * When this function is called for the first time, | |
1209 | * transport->tcp_offset is 4 (after having already read the xid). | |
1210 | */ | |
1211 | offset = transport->tcp_offset - sizeof(transport->tcp_xid); | |
b76ce561 | 1212 | len = sizeof(transport->tcp_calldir) - offset; |
18dca02a | 1213 | dprintk("RPC: reading CALL/REPLY flag (%Zu bytes)\n", len); |
b76ce561 TM |
1214 | p = ((char *) &transport->tcp_calldir) + offset; |
1215 | used = xdr_skb_read_bits(desc, p, len); | |
18dca02a RL |
1216 | transport->tcp_offset += used; |
1217 | if (used != len) | |
1218 | return; | |
f4a2e418 | 1219 | transport->tcp_flags &= ~TCP_RCV_READ_CALLDIR; |
f4a2e418 RL |
1220 | /* |
1221 | * We don't yet have the XDR buffer, so we will write the calldir | |
1222 | * out after we get the buffer from the 'struct rpc_rqst' | |
1223 | */ | |
b76ce561 TM |
1224 | switch (ntohl(transport->tcp_calldir)) { |
1225 | case RPC_REPLY: | |
1226 | transport->tcp_flags |= TCP_RCV_COPY_CALLDIR; | |
1227 | transport->tcp_flags |= TCP_RCV_COPY_DATA; | |
18dca02a | 1228 | transport->tcp_flags |= TCP_RPC_REPLY; |
b76ce561 TM |
1229 | break; |
1230 | case RPC_CALL: | |
1231 | transport->tcp_flags |= TCP_RCV_COPY_CALLDIR; | |
1232 | transport->tcp_flags |= TCP_RCV_COPY_DATA; | |
18dca02a | 1233 | transport->tcp_flags &= ~TCP_RPC_REPLY; |
b76ce561 TM |
1234 | break; |
1235 | default: | |
1236 | dprintk("RPC: invalid request message type\n"); | |
a519fc7a | 1237 | xs_tcp_force_close(&transport->xprt); |
b76ce561 | 1238 | } |
18dca02a RL |
1239 | xs_tcp_check_fraghdr(transport); |
1240 | } | |
1241 | ||
44b98efd RL |
1242 | static inline void xs_tcp_read_common(struct rpc_xprt *xprt, |
1243 | struct xdr_skb_reader *desc, | |
1244 | struct rpc_rqst *req) | |
a246b010 | 1245 | { |
44b98efd RL |
1246 | struct sock_xprt *transport = |
1247 | container_of(xprt, struct sock_xprt, xprt); | |
a246b010 CL |
1248 | struct xdr_buf *rcvbuf; |
1249 | size_t len; | |
1250 | ssize_t r; | |
1251 | ||
a246b010 | 1252 | rcvbuf = &req->rq_private_buf; |
f4a2e418 RL |
1253 | |
1254 | if (transport->tcp_flags & TCP_RCV_COPY_CALLDIR) { | |
1255 | /* | |
1256 | * Save the RPC direction in the XDR buffer | |
1257 | */ | |
f4a2e418 | 1258 | memcpy(rcvbuf->head[0].iov_base + transport->tcp_copied, |
b76ce561 TM |
1259 | &transport->tcp_calldir, |
1260 | sizeof(transport->tcp_calldir)); | |
1261 | transport->tcp_copied += sizeof(transport->tcp_calldir); | |
f4a2e418 | 1262 | transport->tcp_flags &= ~TCP_RCV_COPY_CALLDIR; |
a246b010 CL |
1263 | } |
1264 | ||
a246b010 | 1265 | len = desc->count; |
51971139 | 1266 | if (len > transport->tcp_reclen - transport->tcp_offset) { |
dd456471 | 1267 | struct xdr_skb_reader my_desc; |
a246b010 | 1268 | |
51971139 | 1269 | len = transport->tcp_reclen - transport->tcp_offset; |
a246b010 CL |
1270 | memcpy(&my_desc, desc, sizeof(my_desc)); |
1271 | my_desc.count = len; | |
51971139 | 1272 | r = xdr_partial_copy_from_skb(rcvbuf, transport->tcp_copied, |
9d292316 | 1273 | &my_desc, xdr_skb_read_bits); |
a246b010 CL |
1274 | desc->count -= r; |
1275 | desc->offset += r; | |
1276 | } else | |
51971139 | 1277 | r = xdr_partial_copy_from_skb(rcvbuf, transport->tcp_copied, |
9d292316 | 1278 | desc, xdr_skb_read_bits); |
a246b010 CL |
1279 | |
1280 | if (r > 0) { | |
51971139 CL |
1281 | transport->tcp_copied += r; |
1282 | transport->tcp_offset += r; | |
a246b010 CL |
1283 | } |
1284 | if (r != len) { | |
1285 | /* Error when copying to the receive buffer, | |
1286 | * usually because we weren't able to allocate | |
1287 | * additional buffer pages. All we can do now | |
e136d092 | 1288 | * is turn off TCP_RCV_COPY_DATA, so the request |
a246b010 CL |
1289 | * will not receive any additional updates, |
1290 | * and time out. | |
1291 | * Any remaining data from this record will | |
1292 | * be discarded. | |
1293 | */ | |
e136d092 | 1294 | transport->tcp_flags &= ~TCP_RCV_COPY_DATA; |
46121cf7 | 1295 | dprintk("RPC: XID %08x truncated request\n", |
51971139 | 1296 | ntohl(transport->tcp_xid)); |
46121cf7 CL |
1297 | dprintk("RPC: xprt = %p, tcp_copied = %lu, " |
1298 | "tcp_offset = %u, tcp_reclen = %u\n", | |
1299 | xprt, transport->tcp_copied, | |
1300 | transport->tcp_offset, transport->tcp_reclen); | |
44b98efd | 1301 | return; |
a246b010 CL |
1302 | } |
1303 | ||
46121cf7 | 1304 | dprintk("RPC: XID %08x read %Zd bytes\n", |
51971139 | 1305 | ntohl(transport->tcp_xid), r); |
46121cf7 CL |
1306 | dprintk("RPC: xprt = %p, tcp_copied = %lu, tcp_offset = %u, " |
1307 | "tcp_reclen = %u\n", xprt, transport->tcp_copied, | |
1308 | transport->tcp_offset, transport->tcp_reclen); | |
51971139 CL |
1309 | |
1310 | if (transport->tcp_copied == req->rq_private_buf.buflen) | |
e136d092 | 1311 | transport->tcp_flags &= ~TCP_RCV_COPY_DATA; |
51971139 | 1312 | else if (transport->tcp_offset == transport->tcp_reclen) { |
e136d092 CL |
1313 | if (transport->tcp_flags & TCP_RCV_LAST_FRAG) |
1314 | transport->tcp_flags &= ~TCP_RCV_COPY_DATA; | |
a246b010 | 1315 | } |
44b98efd RL |
1316 | } |
1317 | ||
1318 | /* | |
1319 | * Finds the request corresponding to the RPC xid and invokes the common | |
1320 | * tcp read code to read the data. | |
1321 | */ | |
1322 | static inline int xs_tcp_read_reply(struct rpc_xprt *xprt, | |
1323 | struct xdr_skb_reader *desc) | |
1324 | { | |
1325 | struct sock_xprt *transport = | |
1326 | container_of(xprt, struct sock_xprt, xprt); | |
1327 | struct rpc_rqst *req; | |
1328 | ||
1329 | dprintk("RPC: read reply XID %08x\n", ntohl(transport->tcp_xid)); | |
1330 | ||
1331 | /* Find and lock the request corresponding to this xid */ | |
edc1b01c | 1332 | spin_lock_bh(&xprt->transport_lock); |
44b98efd RL |
1333 | req = xprt_lookup_rqst(xprt, transport->tcp_xid); |
1334 | if (!req) { | |
1335 | dprintk("RPC: XID %08x request not found!\n", | |
1336 | ntohl(transport->tcp_xid)); | |
edc1b01c | 1337 | spin_unlock_bh(&xprt->transport_lock); |
44b98efd RL |
1338 | return -1; |
1339 | } | |
1340 | ||
1341 | xs_tcp_read_common(xprt, desc, req); | |
1342 | ||
e136d092 | 1343 | if (!(transport->tcp_flags & TCP_RCV_COPY_DATA)) |
51971139 | 1344 | xprt_complete_rqst(req->rq_task, transport->tcp_copied); |
44b98efd | 1345 | |
edc1b01c | 1346 | spin_unlock_bh(&xprt->transport_lock); |
44b98efd RL |
1347 | return 0; |
1348 | } | |
1349 | ||
9e00abc3 | 1350 | #if defined(CONFIG_SUNRPC_BACKCHANNEL) |
44b98efd RL |
1351 | /* |
1352 | * Obtains an rpc_rqst previously allocated and invokes the common | |
1353 | * tcp read code to read the data. The result is placed in the callback | |
1354 | * queue. | |
1355 | * If we're unable to obtain the rpc_rqst we schedule the closing of the | |
1356 | * connection and return -1. | |
1357 | */ | |
2ea24497 | 1358 | static int xs_tcp_read_callback(struct rpc_xprt *xprt, |
44b98efd RL |
1359 | struct xdr_skb_reader *desc) |
1360 | { | |
1361 | struct sock_xprt *transport = | |
1362 | container_of(xprt, struct sock_xprt, xprt); | |
1363 | struct rpc_rqst *req; | |
1364 | ||
2ea24497 | 1365 | /* Look up and lock the request corresponding to the given XID */ |
edc1b01c | 1366 | spin_lock_bh(&xprt->transport_lock); |
2ea24497 | 1367 | req = xprt_lookup_bc_request(xprt, transport->tcp_xid); |
44b98efd | 1368 | if (req == NULL) { |
edc1b01c | 1369 | spin_unlock_bh(&xprt->transport_lock); |
44b98efd RL |
1370 | printk(KERN_WARNING "Callback slot table overflowed\n"); |
1371 | xprt_force_disconnect(xprt); | |
1372 | return -1; | |
1373 | } | |
1374 | ||
44b98efd RL |
1375 | dprintk("RPC: read callback XID %08x\n", ntohl(req->rq_xid)); |
1376 | xs_tcp_read_common(xprt, desc, req); | |
1377 | ||
2ea24497 TM |
1378 | if (!(transport->tcp_flags & TCP_RCV_COPY_DATA)) |
1379 | xprt_complete_bc_request(req, transport->tcp_copied); | |
edc1b01c | 1380 | spin_unlock_bh(&xprt->transport_lock); |
44b98efd RL |
1381 | |
1382 | return 0; | |
1383 | } | |
1384 | ||
1385 | static inline int _xs_tcp_read_data(struct rpc_xprt *xprt, | |
1386 | struct xdr_skb_reader *desc) | |
1387 | { | |
1388 | struct sock_xprt *transport = | |
1389 | container_of(xprt, struct sock_xprt, xprt); | |
1390 | ||
1391 | return (transport->tcp_flags & TCP_RPC_REPLY) ? | |
1392 | xs_tcp_read_reply(xprt, desc) : | |
1393 | xs_tcp_read_callback(xprt, desc); | |
1394 | } | |
76566773 CL |
1395 | |
1396 | static int xs_tcp_bc_up(struct svc_serv *serv, struct net *net) | |
1397 | { | |
1398 | int ret; | |
1399 | ||
1400 | ret = svc_create_xprt(serv, "tcp-bc", net, PF_INET, 0, | |
1401 | SVC_SOCK_ANONYMOUS); | |
1402 | if (ret < 0) | |
1403 | return ret; | |
1404 | return 0; | |
1405 | } | |
6b26cc8c CL |
1406 | |
1407 | static size_t xs_tcp_bc_maxpayload(struct rpc_xprt *xprt) | |
1408 | { | |
1409 | return PAGE_SIZE; | |
1410 | } | |
44b98efd RL |
1411 | #else |
1412 | static inline int _xs_tcp_read_data(struct rpc_xprt *xprt, | |
1413 | struct xdr_skb_reader *desc) | |
1414 | { | |
1415 | return xs_tcp_read_reply(xprt, desc); | |
1416 | } | |
9e00abc3 | 1417 | #endif /* CONFIG_SUNRPC_BACKCHANNEL */ |
44b98efd RL |
1418 | |
1419 | /* | |
1420 | * Read data off the transport. This can be either an RPC_CALL or an | |
1421 | * RPC_REPLY. Relay the processing to helper functions. | |
1422 | */ | |
1423 | static void xs_tcp_read_data(struct rpc_xprt *xprt, | |
1424 | struct xdr_skb_reader *desc) | |
1425 | { | |
1426 | struct sock_xprt *transport = | |
1427 | container_of(xprt, struct sock_xprt, xprt); | |
1428 | ||
1429 | if (_xs_tcp_read_data(xprt, desc) == 0) | |
1430 | xs_tcp_check_fraghdr(transport); | |
1431 | else { | |
1432 | /* | |
1433 | * The transport_lock protects the request handling. | |
1434 | * There's no need to hold it to update the tcp_flags. | |
1435 | */ | |
1436 | transport->tcp_flags &= ~TCP_RCV_COPY_DATA; | |
1437 | } | |
a246b010 CL |
1438 | } |
1439 | ||
dd456471 | 1440 | static inline void xs_tcp_read_discard(struct sock_xprt *transport, struct xdr_skb_reader *desc) |
a246b010 CL |
1441 | { |
1442 | size_t len; | |
1443 | ||
51971139 | 1444 | len = transport->tcp_reclen - transport->tcp_offset; |
a246b010 CL |
1445 | if (len > desc->count) |
1446 | len = desc->count; | |
1447 | desc->count -= len; | |
1448 | desc->offset += len; | |
51971139 | 1449 | transport->tcp_offset += len; |
46121cf7 | 1450 | dprintk("RPC: discarded %Zu bytes\n", len); |
51971139 | 1451 | xs_tcp_check_fraghdr(transport); |
a246b010 CL |
1452 | } |
1453 | ||
9903cd1c | 1454 | static int xs_tcp_data_recv(read_descriptor_t *rd_desc, struct sk_buff *skb, unsigned int offset, size_t len) |
a246b010 CL |
1455 | { |
1456 | struct rpc_xprt *xprt = rd_desc->arg.data; | |
51971139 | 1457 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
dd456471 | 1458 | struct xdr_skb_reader desc = { |
a246b010 CL |
1459 | .skb = skb, |
1460 | .offset = offset, | |
1461 | .count = len, | |
9903cd1c | 1462 | }; |
a246b010 | 1463 | |
46121cf7 | 1464 | dprintk("RPC: xs_tcp_data_recv started\n"); |
a246b010 | 1465 | do { |
1a867a08 | 1466 | trace_xs_tcp_data_recv(transport); |
a246b010 CL |
1467 | /* Read in a new fragment marker if necessary */ |
1468 | /* Can we ever really expect to get completely empty fragments? */ | |
e136d092 | 1469 | if (transport->tcp_flags & TCP_RCV_COPY_FRAGHDR) { |
9903cd1c | 1470 | xs_tcp_read_fraghdr(xprt, &desc); |
a246b010 CL |
1471 | continue; |
1472 | } | |
1473 | /* Read in the xid if necessary */ | |
e136d092 | 1474 | if (transport->tcp_flags & TCP_RCV_COPY_XID) { |
51971139 | 1475 | xs_tcp_read_xid(transport, &desc); |
a246b010 CL |
1476 | continue; |
1477 | } | |
18dca02a | 1478 | /* Read in the call/reply flag */ |
f4a2e418 | 1479 | if (transport->tcp_flags & TCP_RCV_READ_CALLDIR) { |
18dca02a RL |
1480 | xs_tcp_read_calldir(transport, &desc); |
1481 | continue; | |
1482 | } | |
a246b010 | 1483 | /* Read in the request data */ |
e136d092 | 1484 | if (transport->tcp_flags & TCP_RCV_COPY_DATA) { |
44b98efd | 1485 | xs_tcp_read_data(xprt, &desc); |
a246b010 CL |
1486 | continue; |
1487 | } | |
1488 | /* Skip over any trailing bytes on short reads */ | |
51971139 | 1489 | xs_tcp_read_discard(transport, &desc); |
a246b010 | 1490 | } while (desc.count); |
1a867a08 | 1491 | trace_xs_tcp_data_recv(transport); |
46121cf7 | 1492 | dprintk("RPC: xs_tcp_data_recv done\n"); |
a246b010 CL |
1493 | return len - desc.count; |
1494 | } | |
1495 | ||
66d7a56a TM |
1496 | static void xs_tcp_data_receive(struct sock_xprt *transport) |
1497 | { | |
1498 | struct rpc_xprt *xprt = &transport->xprt; | |
1499 | struct sock *sk; | |
1500 | read_descriptor_t rd_desc = { | |
1501 | .count = 2*1024*1024, | |
1502 | .arg.data = xprt, | |
1503 | }; | |
1504 | unsigned long total = 0; | |
1505 | int read = 0; | |
1506 | ||
edc1b01c | 1507 | mutex_lock(&transport->recv_mutex); |
66d7a56a | 1508 | sk = transport->inet; |
edc1b01c TM |
1509 | if (sk == NULL) |
1510 | goto out; | |
66d7a56a TM |
1511 | |
1512 | /* We use rd_desc to pass struct xprt to xs_tcp_data_recv */ | |
1513 | for (;;) { | |
edc1b01c | 1514 | lock_sock(sk); |
66d7a56a | 1515 | read = tcp_read_sock(sk, &rd_desc, xs_tcp_data_recv); |
42d42a5b TM |
1516 | if (read <= 0) { |
1517 | clear_bit(XPRT_SOCK_DATA_READY, &transport->sock_state); | |
1518 | release_sock(sk); | |
1519 | if (!test_bit(XPRT_SOCK_DATA_READY, &transport->sock_state)) | |
1520 | break; | |
1521 | } else { | |
1522 | release_sock(sk); | |
1523 | total += read; | |
1524 | } | |
66d7a56a TM |
1525 | rd_desc.count = 65536; |
1526 | } | |
edc1b01c TM |
1527 | out: |
1528 | mutex_unlock(&transport->recv_mutex); | |
66d7a56a TM |
1529 | trace_xs_tcp_data_ready(xprt, read, total); |
1530 | } | |
1531 | ||
edc1b01c TM |
1532 | static void xs_tcp_data_receive_workfn(struct work_struct *work) |
1533 | { | |
1534 | struct sock_xprt *transport = | |
1535 | container_of(work, struct sock_xprt, recv_worker); | |
1536 | xs_tcp_data_receive(transport); | |
1537 | } | |
1538 | ||
9903cd1c CL |
1539 | /** |
1540 | * xs_tcp_state_change - callback to handle TCP socket state changes | |
1541 | * @sk: socket whose state has changed | |
1542 | * | |
1543 | */ | |
1544 | static void xs_tcp_state_change(struct sock *sk) | |
a246b010 | 1545 | { |
9903cd1c | 1546 | struct rpc_xprt *xprt; |
0fdea1e8 | 1547 | struct sock_xprt *transport; |
a246b010 | 1548 | |
f064af1e | 1549 | read_lock_bh(&sk->sk_callback_lock); |
a246b010 CL |
1550 | if (!(xprt = xprt_from_sock(sk))) |
1551 | goto out; | |
46121cf7 | 1552 | dprintk("RPC: xs_tcp_state_change client %p...\n", xprt); |
669502ff | 1553 | dprintk("RPC: state %x conn %d dead %d zapped %d sk_shutdown %d\n", |
46121cf7 CL |
1554 | sk->sk_state, xprt_connected(xprt), |
1555 | sock_flag(sk, SOCK_DEAD), | |
669502ff AC |
1556 | sock_flag(sk, SOCK_ZAPPED), |
1557 | sk->sk_shutdown); | |
a246b010 | 1558 | |
0fdea1e8 | 1559 | transport = container_of(xprt, struct sock_xprt, xprt); |
40b5ea0c | 1560 | trace_rpc_socket_state_change(xprt, sk->sk_socket); |
a246b010 CL |
1561 | switch (sk->sk_state) { |
1562 | case TCP_ESTABLISHED: | |
f064af1e | 1563 | spin_lock(&xprt->transport_lock); |
a246b010 | 1564 | if (!xprt_test_and_set_connected(xprt)) { |
51971139 | 1565 | |
a246b010 | 1566 | /* Reset TCP record info */ |
51971139 CL |
1567 | transport->tcp_offset = 0; |
1568 | transport->tcp_reclen = 0; | |
1569 | transport->tcp_copied = 0; | |
e136d092 CL |
1570 | transport->tcp_flags = |
1571 | TCP_RCV_COPY_FRAGHDR | TCP_RCV_COPY_XID; | |
8b71798c | 1572 | xprt->connect_cookie++; |
0fdea1e8 TM |
1573 | clear_bit(XPRT_SOCK_CONNECTING, &transport->sock_state); |
1574 | xprt_clear_connecting(xprt); | |
51971139 | 1575 | |
2a491991 | 1576 | xprt_wake_pending_tasks(xprt, -EAGAIN); |
a246b010 | 1577 | } |
f064af1e | 1578 | spin_unlock(&xprt->transport_lock); |
a246b010 | 1579 | break; |
3b948ae5 TM |
1580 | case TCP_FIN_WAIT1: |
1581 | /* The client initiated a shutdown of the socket */ | |
7c1d71cf | 1582 | xprt->connect_cookie++; |
663b8858 | 1583 | xprt->reestablish_timeout = 0; |
3b948ae5 | 1584 | set_bit(XPRT_CLOSING, &xprt->state); |
4e857c58 | 1585 | smp_mb__before_atomic(); |
3b948ae5 | 1586 | clear_bit(XPRT_CONNECTED, &xprt->state); |
ef803670 | 1587 | clear_bit(XPRT_CLOSE_WAIT, &xprt->state); |
4e857c58 | 1588 | smp_mb__after_atomic(); |
a246b010 | 1589 | break; |
632e3bdc | 1590 | case TCP_CLOSE_WAIT: |
3b948ae5 | 1591 | /* The server initiated a shutdown of the socket */ |
7c1d71cf | 1592 | xprt->connect_cookie++; |
d0bea455 | 1593 | clear_bit(XPRT_CONNECTED, &xprt->state); |
a519fc7a | 1594 | xs_tcp_force_close(xprt); |
663b8858 TM |
1595 | case TCP_CLOSING: |
1596 | /* | |
1597 | * If the server closed down the connection, make sure that | |
1598 | * we back off before reconnecting | |
1599 | */ | |
1600 | if (xprt->reestablish_timeout < XS_TCP_INIT_REEST_TO) | |
1601 | xprt->reestablish_timeout = XS_TCP_INIT_REEST_TO; | |
3b948ae5 TM |
1602 | break; |
1603 | case TCP_LAST_ACK: | |
670f9457 | 1604 | set_bit(XPRT_CLOSING, &xprt->state); |
4e857c58 | 1605 | smp_mb__before_atomic(); |
3b948ae5 | 1606 | clear_bit(XPRT_CONNECTED, &xprt->state); |
4e857c58 | 1607 | smp_mb__after_atomic(); |
3b948ae5 TM |
1608 | break; |
1609 | case TCP_CLOSE: | |
0fdea1e8 TM |
1610 | if (test_and_clear_bit(XPRT_SOCK_CONNECTING, |
1611 | &transport->sock_state)) | |
1612 | xprt_clear_connecting(xprt); | |
7d1e8255 | 1613 | xs_sock_mark_closed(xprt); |
a246b010 CL |
1614 | } |
1615 | out: | |
f064af1e | 1616 | read_unlock_bh(&sk->sk_callback_lock); |
a246b010 CL |
1617 | } |
1618 | ||
1f0fa154 IJ |
1619 | static void xs_write_space(struct sock *sk) |
1620 | { | |
13331a55 | 1621 | struct socket_wq *wq; |
1f0fa154 IJ |
1622 | struct rpc_xprt *xprt; |
1623 | ||
13331a55 | 1624 | if (!sk->sk_socket) |
1f0fa154 | 1625 | return; |
13331a55 | 1626 | clear_bit(SOCK_NOSPACE, &sk->sk_socket->flags); |
1f0fa154 IJ |
1627 | |
1628 | if (unlikely(!(xprt = xprt_from_sock(sk)))) | |
1629 | return; | |
13331a55 TM |
1630 | rcu_read_lock(); |
1631 | wq = rcu_dereference(sk->sk_wq); | |
1632 | if (!wq || test_and_clear_bit(SOCKWQ_ASYNC_NOSPACE, &wq->flags) == 0) | |
1633 | goto out; | |
1f0fa154 IJ |
1634 | |
1635 | xprt_write_space(xprt); | |
13331a55 TM |
1636 | out: |
1637 | rcu_read_unlock(); | |
1f0fa154 IJ |
1638 | } |
1639 | ||
9903cd1c | 1640 | /** |
c7b2cae8 CL |
1641 | * xs_udp_write_space - callback invoked when socket buffer space |
1642 | * becomes available | |
9903cd1c CL |
1643 | * @sk: socket whose state has changed |
1644 | * | |
a246b010 CL |
1645 | * Called when more output buffer space is available for this socket. |
1646 | * We try not to wake our writers until they can make "significant" | |
c7b2cae8 | 1647 | * progress, otherwise we'll waste resources thrashing kernel_sendmsg |
a246b010 CL |
1648 | * with a bunch of small requests. |
1649 | */ | |
c7b2cae8 | 1650 | static void xs_udp_write_space(struct sock *sk) |
a246b010 | 1651 | { |
f064af1e | 1652 | read_lock_bh(&sk->sk_callback_lock); |
a246b010 | 1653 | |
c7b2cae8 | 1654 | /* from net/core/sock.c:sock_def_write_space */ |
1f0fa154 IJ |
1655 | if (sock_writeable(sk)) |
1656 | xs_write_space(sk); | |
a246b010 | 1657 | |
f064af1e | 1658 | read_unlock_bh(&sk->sk_callback_lock); |
c7b2cae8 | 1659 | } |
a246b010 | 1660 | |
c7b2cae8 CL |
1661 | /** |
1662 | * xs_tcp_write_space - callback invoked when socket buffer space | |
1663 | * becomes available | |
1664 | * @sk: socket whose state has changed | |
1665 | * | |
1666 | * Called when more output buffer space is available for this socket. | |
1667 | * We try not to wake our writers until they can make "significant" | |
1668 | * progress, otherwise we'll waste resources thrashing kernel_sendmsg | |
1669 | * with a bunch of small requests. | |
1670 | */ | |
1671 | static void xs_tcp_write_space(struct sock *sk) | |
1672 | { | |
f064af1e | 1673 | read_lock_bh(&sk->sk_callback_lock); |
c7b2cae8 CL |
1674 | |
1675 | /* from net/core/stream.c:sk_stream_write_space */ | |
64dc6130 | 1676 | if (sk_stream_is_writeable(sk)) |
1f0fa154 | 1677 | xs_write_space(sk); |
b6ddf64f | 1678 | |
f064af1e | 1679 | read_unlock_bh(&sk->sk_callback_lock); |
a246b010 CL |
1680 | } |
1681 | ||
470056c2 | 1682 | static void xs_udp_do_set_buffer_size(struct rpc_xprt *xprt) |
a246b010 | 1683 | { |
ee0ac0c2 CL |
1684 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
1685 | struct sock *sk = transport->inet; | |
a246b010 | 1686 | |
7c6e066e | 1687 | if (transport->rcvsize) { |
a246b010 | 1688 | sk->sk_userlocks |= SOCK_RCVBUF_LOCK; |
7c6e066e | 1689 | sk->sk_rcvbuf = transport->rcvsize * xprt->max_reqs * 2; |
a246b010 | 1690 | } |
7c6e066e | 1691 | if (transport->sndsize) { |
a246b010 | 1692 | sk->sk_userlocks |= SOCK_SNDBUF_LOCK; |
7c6e066e | 1693 | sk->sk_sndbuf = transport->sndsize * xprt->max_reqs * 2; |
a246b010 CL |
1694 | sk->sk_write_space(sk); |
1695 | } | |
1696 | } | |
1697 | ||
43118c29 | 1698 | /** |
470056c2 | 1699 | * xs_udp_set_buffer_size - set send and receive limits |
43118c29 | 1700 | * @xprt: generic transport |
470056c2 CL |
1701 | * @sndsize: requested size of send buffer, in bytes |
1702 | * @rcvsize: requested size of receive buffer, in bytes | |
43118c29 | 1703 | * |
470056c2 | 1704 | * Set socket send and receive buffer size limits. |
43118c29 | 1705 | */ |
470056c2 | 1706 | static void xs_udp_set_buffer_size(struct rpc_xprt *xprt, size_t sndsize, size_t rcvsize) |
43118c29 | 1707 | { |
7c6e066e CL |
1708 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
1709 | ||
1710 | transport->sndsize = 0; | |
470056c2 | 1711 | if (sndsize) |
7c6e066e CL |
1712 | transport->sndsize = sndsize + 1024; |
1713 | transport->rcvsize = 0; | |
470056c2 | 1714 | if (rcvsize) |
7c6e066e | 1715 | transport->rcvsize = rcvsize + 1024; |
470056c2 CL |
1716 | |
1717 | xs_udp_do_set_buffer_size(xprt); | |
43118c29 CL |
1718 | } |
1719 | ||
46c0ee8b CL |
1720 | /** |
1721 | * xs_udp_timer - called when a retransmit timeout occurs on a UDP transport | |
1722 | * @task: task that timed out | |
1723 | * | |
1724 | * Adjust the congestion window after a retransmit timeout has occurred. | |
1725 | */ | |
6a24dfb6 | 1726 | static void xs_udp_timer(struct rpc_xprt *xprt, struct rpc_task *task) |
46c0ee8b | 1727 | { |
6a24dfb6 | 1728 | xprt_adjust_cwnd(xprt, task, -ETIMEDOUT); |
46c0ee8b CL |
1729 | } |
1730 | ||
b85d8806 CL |
1731 | static unsigned short xs_get_random_port(void) |
1732 | { | |
5d71899a | 1733 | unsigned short range = xprt_max_resvport - xprt_min_resvport + 1; |
63862b5b | 1734 | unsigned short rand = (unsigned short) prandom_u32() % range; |
b85d8806 CL |
1735 | return rand + xprt_min_resvport; |
1736 | } | |
1737 | ||
4dda9c8a TM |
1738 | /** |
1739 | * xs_set_reuseaddr_port - set the socket's port and address reuse options | |
1740 | * @sock: socket | |
1741 | * | |
1742 | * Note that this function has to be called on all sockets that share the | |
1743 | * same port, and it must be called before binding. | |
1744 | */ | |
1745 | static void xs_sock_set_reuseport(struct socket *sock) | |
1746 | { | |
402e23b4 | 1747 | int opt = 1; |
4dda9c8a | 1748 | |
402e23b4 TM |
1749 | kernel_setsockopt(sock, SOL_SOCKET, SO_REUSEPORT, |
1750 | (char *)&opt, sizeof(opt)); | |
4dda9c8a TM |
1751 | } |
1752 | ||
1753 | static unsigned short xs_sock_getport(struct socket *sock) | |
1754 | { | |
1755 | struct sockaddr_storage buf; | |
1756 | int buflen; | |
1757 | unsigned short port = 0; | |
1758 | ||
1759 | if (kernel_getsockname(sock, (struct sockaddr *)&buf, &buflen) < 0) | |
1760 | goto out; | |
1761 | switch (buf.ss_family) { | |
1762 | case AF_INET6: | |
1763 | port = ntohs(((struct sockaddr_in6 *)&buf)->sin6_port); | |
1764 | break; | |
1765 | case AF_INET: | |
1766 | port = ntohs(((struct sockaddr_in *)&buf)->sin_port); | |
1767 | } | |
1768 | out: | |
1769 | return port; | |
1770 | } | |
1771 | ||
92200412 CL |
1772 | /** |
1773 | * xs_set_port - reset the port number in the remote endpoint address | |
1774 | * @xprt: generic transport | |
1775 | * @port: new port number | |
1776 | * | |
1777 | */ | |
1778 | static void xs_set_port(struct rpc_xprt *xprt, unsigned short port) | |
1779 | { | |
46121cf7 | 1780 | dprintk("RPC: setting port for xprt %p to %u\n", xprt, port); |
c4efcb1d | 1781 | |
9dc3b095 CL |
1782 | rpc_set_port(xs_addr(xprt), port); |
1783 | xs_update_peer_port(xprt); | |
92200412 CL |
1784 | } |
1785 | ||
4dda9c8a TM |
1786 | static void xs_set_srcport(struct sock_xprt *transport, struct socket *sock) |
1787 | { | |
1788 | if (transport->srcport == 0) | |
1789 | transport->srcport = xs_sock_getport(sock); | |
1790 | } | |
1791 | ||
5d4ec932 | 1792 | static unsigned short xs_get_srcport(struct sock_xprt *transport) |
67a391d7 | 1793 | { |
fbfffbd5 | 1794 | unsigned short port = transport->srcport; |
67a391d7 TM |
1795 | |
1796 | if (port == 0 && transport->xprt.resvport) | |
1797 | port = xs_get_random_port(); | |
1798 | return port; | |
1799 | } | |
1800 | ||
baaf4e48 | 1801 | static unsigned short xs_next_srcport(struct sock_xprt *transport, unsigned short port) |
67a391d7 | 1802 | { |
fbfffbd5 CL |
1803 | if (transport->srcport != 0) |
1804 | transport->srcport = 0; | |
67a391d7 TM |
1805 | if (!transport->xprt.resvport) |
1806 | return 0; | |
1807 | if (port <= xprt_min_resvport || port > xprt_max_resvport) | |
1808 | return xprt_max_resvport; | |
1809 | return --port; | |
1810 | } | |
beb59b68 | 1811 | static int xs_bind(struct sock_xprt *transport, struct socket *sock) |
a246b010 | 1812 | { |
beb59b68 | 1813 | struct sockaddr_storage myaddr; |
67a391d7 | 1814 | int err, nloop = 0; |
5d4ec932 | 1815 | unsigned short port = xs_get_srcport(transport); |
67a391d7 | 1816 | unsigned short last; |
a246b010 | 1817 | |
0f7a622c CP |
1818 | /* |
1819 | * If we are asking for any ephemeral port (i.e. port == 0 && | |
1820 | * transport->xprt.resvport == 0), don't bind. Let the local | |
1821 | * port selection happen implicitly when the socket is used | |
1822 | * (for example at connect time). | |
1823 | * | |
1824 | * This ensures that we can continue to establish TCP | |
1825 | * connections even when all local ephemeral ports are already | |
1826 | * a part of some TCP connection. This makes no difference | |
1827 | * for UDP sockets, but also doens't harm them. | |
1828 | * | |
1829 | * If we're asking for any reserved port (i.e. port == 0 && | |
1830 | * transport->xprt.resvport == 1) xs_get_srcport above will | |
1831 | * ensure that port is non-zero and we will bind as needed. | |
1832 | */ | |
1833 | if (port == 0) | |
1834 | return 0; | |
1835 | ||
beb59b68 | 1836 | memcpy(&myaddr, &transport->srcaddr, transport->xprt.addrlen); |
a246b010 | 1837 | do { |
beb59b68 PE |
1838 | rpc_set_port((struct sockaddr *)&myaddr, port); |
1839 | err = kernel_bind(sock, (struct sockaddr *)&myaddr, | |
1840 | transport->xprt.addrlen); | |
a246b010 | 1841 | if (err == 0) { |
fbfffbd5 | 1842 | transport->srcport = port; |
d3bc9a1d | 1843 | break; |
a246b010 | 1844 | } |
67a391d7 | 1845 | last = port; |
baaf4e48 | 1846 | port = xs_next_srcport(transport, port); |
67a391d7 TM |
1847 | if (port > last) |
1848 | nloop++; | |
1849 | } while (err == -EADDRINUSE && nloop != 2); | |
90058d37 | 1850 | |
4232e863 | 1851 | if (myaddr.ss_family == AF_INET) |
beb59b68 PE |
1852 | dprintk("RPC: %s %pI4:%u: %s (%d)\n", __func__, |
1853 | &((struct sockaddr_in *)&myaddr)->sin_addr, | |
1854 | port, err ? "failed" : "ok", err); | |
1855 | else | |
1856 | dprintk("RPC: %s %pI6:%u: %s (%d)\n", __func__, | |
1857 | &((struct sockaddr_in6 *)&myaddr)->sin6_addr, | |
1858 | port, err ? "failed" : "ok", err); | |
a246b010 CL |
1859 | return err; |
1860 | } | |
1861 | ||
176e21ee CL |
1862 | /* |
1863 | * We don't support autobind on AF_LOCAL sockets | |
1864 | */ | |
1865 | static void xs_local_rpcbind(struct rpc_task *task) | |
1866 | { | |
fb43d172 | 1867 | xprt_set_bound(task->tk_xprt); |
176e21ee CL |
1868 | } |
1869 | ||
1870 | static void xs_local_set_port(struct rpc_xprt *xprt, unsigned short port) | |
1871 | { | |
1872 | } | |
beb59b68 | 1873 | |
ed07536e PZ |
1874 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
1875 | static struct lock_class_key xs_key[2]; | |
1876 | static struct lock_class_key xs_slock_key[2]; | |
1877 | ||
176e21ee CL |
1878 | static inline void xs_reclassify_socketu(struct socket *sock) |
1879 | { | |
1880 | struct sock *sk = sock->sk; | |
1881 | ||
176e21ee CL |
1882 | sock_lock_init_class_and_name(sk, "slock-AF_LOCAL-RPC", |
1883 | &xs_slock_key[1], "sk_lock-AF_LOCAL-RPC", &xs_key[1]); | |
1884 | } | |
1885 | ||
8945ee5e | 1886 | static inline void xs_reclassify_socket4(struct socket *sock) |
ed07536e PZ |
1887 | { |
1888 | struct sock *sk = sock->sk; | |
8945ee5e | 1889 | |
8945ee5e CL |
1890 | sock_lock_init_class_and_name(sk, "slock-AF_INET-RPC", |
1891 | &xs_slock_key[0], "sk_lock-AF_INET-RPC", &xs_key[0]); | |
1892 | } | |
ed07536e | 1893 | |
8945ee5e CL |
1894 | static inline void xs_reclassify_socket6(struct socket *sock) |
1895 | { | |
1896 | struct sock *sk = sock->sk; | |
ed07536e | 1897 | |
8945ee5e CL |
1898 | sock_lock_init_class_and_name(sk, "slock-AF_INET6-RPC", |
1899 | &xs_slock_key[1], "sk_lock-AF_INET6-RPC", &xs_key[1]); | |
ed07536e | 1900 | } |
6bc9638a PE |
1901 | |
1902 | static inline void xs_reclassify_socket(int family, struct socket *sock) | |
1903 | { | |
fafc4e1e | 1904 | if (WARN_ON_ONCE(!sock_allow_reclassification(sock->sk))) |
1b7a1819 WAA |
1905 | return; |
1906 | ||
4232e863 | 1907 | switch (family) { |
176e21ee CL |
1908 | case AF_LOCAL: |
1909 | xs_reclassify_socketu(sock); | |
1910 | break; | |
4232e863 | 1911 | case AF_INET: |
6bc9638a | 1912 | xs_reclassify_socket4(sock); |
4232e863 CL |
1913 | break; |
1914 | case AF_INET6: | |
6bc9638a | 1915 | xs_reclassify_socket6(sock); |
4232e863 CL |
1916 | break; |
1917 | } | |
6bc9638a | 1918 | } |
ed07536e | 1919 | #else |
6bc9638a PE |
1920 | static inline void xs_reclassify_socket(int family, struct socket *sock) |
1921 | { | |
1922 | } | |
ed07536e PZ |
1923 | #endif |
1924 | ||
93dc41bd N |
1925 | static void xs_dummy_setup_socket(struct work_struct *work) |
1926 | { | |
1927 | } | |
1928 | ||
6bc9638a | 1929 | static struct socket *xs_create_sock(struct rpc_xprt *xprt, |
4dda9c8a TM |
1930 | struct sock_xprt *transport, int family, int type, |
1931 | int protocol, bool reuseport) | |
22f79326 PE |
1932 | { |
1933 | struct socket *sock; | |
1934 | int err; | |
1935 | ||
6bc9638a | 1936 | err = __sock_create(xprt->xprt_net, family, type, protocol, &sock, 1); |
22f79326 PE |
1937 | if (err < 0) { |
1938 | dprintk("RPC: can't create %d transport socket (%d).\n", | |
1939 | protocol, -err); | |
1940 | goto out; | |
1941 | } | |
6bc9638a | 1942 | xs_reclassify_socket(family, sock); |
22f79326 | 1943 | |
4dda9c8a TM |
1944 | if (reuseport) |
1945 | xs_sock_set_reuseport(sock); | |
1946 | ||
4cea288a BH |
1947 | err = xs_bind(transport, sock); |
1948 | if (err) { | |
22f79326 PE |
1949 | sock_release(sock); |
1950 | goto out; | |
1951 | } | |
1952 | ||
1953 | return sock; | |
1954 | out: | |
1955 | return ERR_PTR(err); | |
1956 | } | |
1957 | ||
176e21ee CL |
1958 | static int xs_local_finish_connecting(struct rpc_xprt *xprt, |
1959 | struct socket *sock) | |
1960 | { | |
1961 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, | |
1962 | xprt); | |
1963 | ||
1964 | if (!transport->inet) { | |
1965 | struct sock *sk = sock->sk; | |
1966 | ||
1967 | write_lock_bh(&sk->sk_callback_lock); | |
1968 | ||
1969 | xs_save_old_callbacks(transport, sk); | |
1970 | ||
1971 | sk->sk_user_data = xprt; | |
a2648094 | 1972 | sk->sk_data_ready = xs_data_ready; |
176e21ee | 1973 | sk->sk_write_space = xs_udp_write_space; |
b4411457 | 1974 | sock_set_flag(sk, SOCK_FASYNC); |
2118071d | 1975 | sk->sk_error_report = xs_error_report; |
c2126157 | 1976 | sk->sk_allocation = GFP_NOIO; |
176e21ee CL |
1977 | |
1978 | xprt_clear_connected(xprt); | |
1979 | ||
1980 | /* Reset to new socket */ | |
1981 | transport->sock = sock; | |
1982 | transport->inet = sk; | |
1983 | ||
1984 | write_unlock_bh(&sk->sk_callback_lock); | |
1985 | } | |
1986 | ||
1987 | /* Tell the socket layer to start connecting... */ | |
1988 | xprt->stat.connect_count++; | |
1989 | xprt->stat.connect_start = jiffies; | |
1990 | return kernel_connect(sock, xs_addr(xprt), xprt->addrlen, 0); | |
1991 | } | |
1992 | ||
1993 | /** | |
1994 | * xs_local_setup_socket - create AF_LOCAL socket, connect to a local endpoint | |
176e21ee | 1995 | * @transport: socket transport to connect |
176e21ee | 1996 | */ |
dc107402 | 1997 | static int xs_local_setup_socket(struct sock_xprt *transport) |
176e21ee | 1998 | { |
176e21ee CL |
1999 | struct rpc_xprt *xprt = &transport->xprt; |
2000 | struct socket *sock; | |
2001 | int status = -EIO; | |
2002 | ||
176e21ee CL |
2003 | status = __sock_create(xprt->xprt_net, AF_LOCAL, |
2004 | SOCK_STREAM, 0, &sock, 1); | |
2005 | if (status < 0) { | |
2006 | dprintk("RPC: can't create AF_LOCAL " | |
2007 | "transport socket (%d).\n", -status); | |
2008 | goto out; | |
2009 | } | |
d1358917 | 2010 | xs_reclassify_socket(AF_LOCAL, sock); |
176e21ee CL |
2011 | |
2012 | dprintk("RPC: worker connecting xprt %p via AF_LOCAL to %s\n", | |
2013 | xprt, xprt->address_strings[RPC_DISPLAY_ADDR]); | |
2014 | ||
2015 | status = xs_local_finish_connecting(xprt, sock); | |
40b5ea0c | 2016 | trace_rpc_socket_connect(xprt, sock, status); |
176e21ee CL |
2017 | switch (status) { |
2018 | case 0: | |
2019 | dprintk("RPC: xprt %p connected to %s\n", | |
2020 | xprt, xprt->address_strings[RPC_DISPLAY_ADDR]); | |
2021 | xprt_set_connected(xprt); | |
3601c4a9 | 2022 | case -ENOBUFS: |
176e21ee CL |
2023 | break; |
2024 | case -ENOENT: | |
2025 | dprintk("RPC: xprt %p: socket %s does not exist\n", | |
2026 | xprt, xprt->address_strings[RPC_DISPLAY_ADDR]); | |
2027 | break; | |
4a20a988 TM |
2028 | case -ECONNREFUSED: |
2029 | dprintk("RPC: xprt %p: connection refused for %s\n", | |
2030 | xprt, xprt->address_strings[RPC_DISPLAY_ADDR]); | |
2031 | break; | |
176e21ee CL |
2032 | default: |
2033 | printk(KERN_ERR "%s: unhandled error (%d) connecting to %s\n", | |
2034 | __func__, -status, | |
2035 | xprt->address_strings[RPC_DISPLAY_ADDR]); | |
2036 | } | |
2037 | ||
2038 | out: | |
2039 | xprt_clear_connecting(xprt); | |
2040 | xprt_wake_pending_tasks(xprt, status); | |
dc107402 BF |
2041 | return status; |
2042 | } | |
2043 | ||
b6669737 | 2044 | static void xs_local_connect(struct rpc_xprt *xprt, struct rpc_task *task) |
dc107402 | 2045 | { |
dc107402 BF |
2046 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
2047 | int ret; | |
2048 | ||
2049 | if (RPC_IS_ASYNC(task)) { | |
2050 | /* | |
2051 | * We want the AF_LOCAL connect to be resolved in the | |
2052 | * filesystem namespace of the process making the rpc | |
2053 | * call. Thus we connect synchronously. | |
2054 | * | |
2055 | * If we want to support asynchronous AF_LOCAL calls, | |
2056 | * we'll need to figure out how to pass a namespace to | |
2057 | * connect. | |
2058 | */ | |
2059 | rpc_exit(task, -ENOTCONN); | |
2060 | return; | |
2061 | } | |
2062 | ret = xs_local_setup_socket(transport); | |
2063 | if (ret && !RPC_IS_SOFTCONN(task)) | |
2064 | msleep_interruptible(15000); | |
176e21ee CL |
2065 | } |
2066 | ||
3c87ef6e | 2067 | #if IS_ENABLED(CONFIG_SUNRPC_SWAP) |
d6e971d8 JL |
2068 | /* |
2069 | * Note that this should be called with XPRT_LOCKED held (or when we otherwise | |
2070 | * know that we have exclusive access to the socket), to guard against | |
2071 | * races with xs_reset_transport. | |
2072 | */ | |
a564b8f0 MG |
2073 | static void xs_set_memalloc(struct rpc_xprt *xprt) |
2074 | { | |
2075 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, | |
2076 | xprt); | |
2077 | ||
d6e971d8 JL |
2078 | /* |
2079 | * If there's no sock, then we have nothing to set. The | |
2080 | * reconnecting process will get it for us. | |
2081 | */ | |
2082 | if (!transport->inet) | |
2083 | return; | |
8e228133 | 2084 | if (atomic_read(&xprt->swapper)) |
a564b8f0 MG |
2085 | sk_set_memalloc(transport->inet); |
2086 | } | |
2087 | ||
2088 | /** | |
d67fa4d8 | 2089 | * xs_enable_swap - Tag this transport as being used for swap. |
a564b8f0 | 2090 | * @xprt: transport to tag |
a564b8f0 | 2091 | * |
8e228133 JL |
2092 | * Take a reference to this transport on behalf of the rpc_clnt, and |
2093 | * optionally mark it for swapping if it wasn't already. | |
a564b8f0 | 2094 | */ |
d67fa4d8 JL |
2095 | static int |
2096 | xs_enable_swap(struct rpc_xprt *xprt) | |
a564b8f0 | 2097 | { |
d6e971d8 | 2098 | struct sock_xprt *xs = container_of(xprt, struct sock_xprt, xprt); |
a564b8f0 | 2099 | |
d6e971d8 JL |
2100 | if (atomic_inc_return(&xprt->swapper) != 1) |
2101 | return 0; | |
2102 | if (wait_on_bit_lock(&xprt->state, XPRT_LOCKED, TASK_KILLABLE)) | |
2103 | return -ERESTARTSYS; | |
2104 | if (xs->inet) | |
2105 | sk_set_memalloc(xs->inet); | |
2106 | xprt_release_xprt(xprt, NULL); | |
8e228133 JL |
2107 | return 0; |
2108 | } | |
a564b8f0 | 2109 | |
8e228133 | 2110 | /** |
d67fa4d8 | 2111 | * xs_disable_swap - Untag this transport as being used for swap. |
8e228133 JL |
2112 | * @xprt: transport to tag |
2113 | * | |
2114 | * Drop a "swapper" reference to this xprt on behalf of the rpc_clnt. If the | |
2115 | * swapper refcount goes to 0, untag the socket as a memalloc socket. | |
2116 | */ | |
d67fa4d8 JL |
2117 | static void |
2118 | xs_disable_swap(struct rpc_xprt *xprt) | |
8e228133 | 2119 | { |
d6e971d8 | 2120 | struct sock_xprt *xs = container_of(xprt, struct sock_xprt, xprt); |
8e228133 | 2121 | |
d6e971d8 JL |
2122 | if (!atomic_dec_and_test(&xprt->swapper)) |
2123 | return; | |
2124 | if (wait_on_bit_lock(&xprt->state, XPRT_LOCKED, TASK_KILLABLE)) | |
2125 | return; | |
2126 | if (xs->inet) | |
2127 | sk_clear_memalloc(xs->inet); | |
2128 | xprt_release_xprt(xprt, NULL); | |
a564b8f0 | 2129 | } |
a564b8f0 MG |
2130 | #else |
2131 | static void xs_set_memalloc(struct rpc_xprt *xprt) | |
2132 | { | |
2133 | } | |
d67fa4d8 JL |
2134 | |
2135 | static int | |
2136 | xs_enable_swap(struct rpc_xprt *xprt) | |
2137 | { | |
2138 | return -EINVAL; | |
2139 | } | |
2140 | ||
2141 | static void | |
2142 | xs_disable_swap(struct rpc_xprt *xprt) | |
2143 | { | |
2144 | } | |
a564b8f0 MG |
2145 | #endif |
2146 | ||
16be2d20 CL |
2147 | static void xs_udp_finish_connecting(struct rpc_xprt *xprt, struct socket *sock) |
2148 | { | |
2149 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); | |
2150 | ||
2151 | if (!transport->inet) { | |
2152 | struct sock *sk = sock->sk; | |
2153 | ||
2154 | write_lock_bh(&sk->sk_callback_lock); | |
2155 | ||
2a9e1cfa TM |
2156 | xs_save_old_callbacks(transport, sk); |
2157 | ||
16be2d20 | 2158 | sk->sk_user_data = xprt; |
f9b2ee71 | 2159 | sk->sk_data_ready = xs_data_ready; |
16be2d20 | 2160 | sk->sk_write_space = xs_udp_write_space; |
b4411457 | 2161 | sock_set_flag(sk, SOCK_FASYNC); |
c2126157 | 2162 | sk->sk_allocation = GFP_NOIO; |
16be2d20 CL |
2163 | |
2164 | xprt_set_connected(xprt); | |
2165 | ||
2166 | /* Reset to new socket */ | |
2167 | transport->sock = sock; | |
2168 | transport->inet = sk; | |
2169 | ||
a564b8f0 MG |
2170 | xs_set_memalloc(xprt); |
2171 | ||
16be2d20 CL |
2172 | write_unlock_bh(&sk->sk_callback_lock); |
2173 | } | |
2174 | xs_udp_do_set_buffer_size(xprt); | |
02910177 TM |
2175 | |
2176 | xprt->stat.connect_start = jiffies; | |
16be2d20 CL |
2177 | } |
2178 | ||
8c14ff2a | 2179 | static void xs_udp_setup_socket(struct work_struct *work) |
a246b010 | 2180 | { |
34161db6 TM |
2181 | struct sock_xprt *transport = |
2182 | container_of(work, struct sock_xprt, connect_worker.work); | |
c8475461 | 2183 | struct rpc_xprt *xprt = &transport->xprt; |
ee0ac0c2 | 2184 | struct socket *sock = transport->sock; |
b65c0310 | 2185 | int status = -EIO; |
9903cd1c | 2186 | |
8c14ff2a | 2187 | sock = xs_create_sock(xprt, transport, |
4dda9c8a TM |
2188 | xs_addr(xprt)->sa_family, SOCK_DGRAM, |
2189 | IPPROTO_UDP, false); | |
b65c0310 | 2190 | if (IS_ERR(sock)) |
b0d93ad5 | 2191 | goto out; |
68e220bd | 2192 | |
c740eff8 CL |
2193 | dprintk("RPC: worker connecting xprt %p via %s to " |
2194 | "%s (port %s)\n", xprt, | |
2195 | xprt->address_strings[RPC_DISPLAY_PROTO], | |
2196 | xprt->address_strings[RPC_DISPLAY_ADDR], | |
2197 | xprt->address_strings[RPC_DISPLAY_PORT]); | |
68e220bd CL |
2198 | |
2199 | xs_udp_finish_connecting(xprt, sock); | |
40b5ea0c | 2200 | trace_rpc_socket_connect(xprt, sock, 0); |
b0d93ad5 CL |
2201 | status = 0; |
2202 | out: | |
718ba5b8 | 2203 | xprt_unlock_connect(xprt, transport); |
b0d93ad5 | 2204 | xprt_clear_connecting(xprt); |
7d1e8255 | 2205 | xprt_wake_pending_tasks(xprt, status); |
a246b010 CL |
2206 | } |
2207 | ||
4876cc77 TM |
2208 | /** |
2209 | * xs_tcp_shutdown - gracefully shut down a TCP socket | |
2210 | * @xprt: transport | |
2211 | * | |
2212 | * Initiates a graceful shutdown of the TCP socket by calling the | |
2213 | * equivalent of shutdown(SHUT_RDWR); | |
2214 | */ | |
2215 | static void xs_tcp_shutdown(struct rpc_xprt *xprt) | |
2216 | { | |
2217 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); | |
2218 | struct socket *sock = transport->sock; | |
2219 | ||
2220 | if (sock == NULL) | |
2221 | return; | |
2222 | if (xprt_connected(xprt)) { | |
2223 | kernel_sock_shutdown(sock, SHUT_RDWR); | |
2224 | trace_rpc_socket_shutdown(xprt, sock); | |
2225 | } else | |
2226 | xs_reset_transport(transport); | |
2227 | } | |
2228 | ||
16be2d20 | 2229 | static int xs_tcp_finish_connecting(struct rpc_xprt *xprt, struct socket *sock) |
a246b010 | 2230 | { |
16be2d20 | 2231 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
fe19a96b | 2232 | int ret = -ENOTCONN; |
edb267a6 | 2233 | |
ee0ac0c2 | 2234 | if (!transport->inet) { |
b0d93ad5 | 2235 | struct sock *sk = sock->sk; |
7f260e85 TM |
2236 | unsigned int keepidle = xprt->timeout->to_initval / HZ; |
2237 | unsigned int keepcnt = xprt->timeout->to_retries + 1; | |
2238 | unsigned int opt_on = 1; | |
775f06ab | 2239 | unsigned int timeo; |
d88e4d82 | 2240 | unsigned int addr_pref = IPV6_PREFER_SRC_PUBLIC; |
7f260e85 TM |
2241 | |
2242 | /* TCP Keepalive options */ | |
2243 | kernel_setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, | |
2244 | (char *)&opt_on, sizeof(opt_on)); | |
2245 | kernel_setsockopt(sock, SOL_TCP, TCP_KEEPIDLE, | |
2246 | (char *)&keepidle, sizeof(keepidle)); | |
2247 | kernel_setsockopt(sock, SOL_TCP, TCP_KEEPINTVL, | |
2248 | (char *)&keepidle, sizeof(keepidle)); | |
2249 | kernel_setsockopt(sock, SOL_TCP, TCP_KEEPCNT, | |
2250 | (char *)&keepcnt, sizeof(keepcnt)); | |
b0d93ad5 | 2251 | |
d88e4d82 N |
2252 | /* Avoid temporary address, they are bad for long-lived |
2253 | * connections such as NFS mounts. | |
2254 | * RFC4941, section 3.6 suggests that: | |
2255 | * Individual applications, which have specific | |
2256 | * knowledge about the normal duration of connections, | |
2257 | * MAY override this as appropriate. | |
2258 | */ | |
2259 | kernel_setsockopt(sock, SOL_IPV6, IPV6_ADDR_PREFERENCES, | |
2260 | (char *)&addr_pref, sizeof(addr_pref)); | |
2261 | ||
775f06ab TM |
2262 | /* TCP user timeout (see RFC5482) */ |
2263 | timeo = jiffies_to_msecs(xprt->timeout->to_initval) * | |
2264 | (xprt->timeout->to_retries + 1); | |
2265 | kernel_setsockopt(sock, SOL_TCP, TCP_USER_TIMEOUT, | |
2266 | (char *)&timeo, sizeof(timeo)); | |
2267 | ||
b0d93ad5 CL |
2268 | write_lock_bh(&sk->sk_callback_lock); |
2269 | ||
2a9e1cfa TM |
2270 | xs_save_old_callbacks(transport, sk); |
2271 | ||
b0d93ad5 | 2272 | sk->sk_user_data = xprt; |
5157b956 | 2273 | sk->sk_data_ready = xs_data_ready; |
b0d93ad5 CL |
2274 | sk->sk_state_change = xs_tcp_state_change; |
2275 | sk->sk_write_space = xs_tcp_write_space; | |
b4411457 | 2276 | sock_set_flag(sk, SOCK_FASYNC); |
2118071d | 2277 | sk->sk_error_report = xs_error_report; |
c2126157 | 2278 | sk->sk_allocation = GFP_NOIO; |
3167e12c CL |
2279 | |
2280 | /* socket options */ | |
3167e12c | 2281 | sock_reset_flag(sk, SOCK_LINGER); |
3167e12c | 2282 | tcp_sk(sk)->nonagle |= TCP_NAGLE_OFF; |
b0d93ad5 CL |
2283 | |
2284 | xprt_clear_connected(xprt); | |
2285 | ||
2286 | /* Reset to new socket */ | |
ee0ac0c2 CL |
2287 | transport->sock = sock; |
2288 | transport->inet = sk; | |
b0d93ad5 CL |
2289 | |
2290 | write_unlock_bh(&sk->sk_callback_lock); | |
2291 | } | |
2292 | ||
01d37c42 | 2293 | if (!xprt_bound(xprt)) |
fe19a96b | 2294 | goto out; |
01d37c42 | 2295 | |
a564b8f0 MG |
2296 | xs_set_memalloc(xprt); |
2297 | ||
b0d93ad5 | 2298 | /* Tell the socket layer to start connecting... */ |
262ca07d CL |
2299 | xprt->stat.connect_count++; |
2300 | xprt->stat.connect_start = jiffies; | |
0fdea1e8 | 2301 | set_bit(XPRT_SOCK_CONNECTING, &transport->sock_state); |
fe19a96b TM |
2302 | ret = kernel_connect(sock, xs_addr(xprt), xprt->addrlen, O_NONBLOCK); |
2303 | switch (ret) { | |
2304 | case 0: | |
4dda9c8a | 2305 | xs_set_srcport(transport, sock); |
fe19a96b TM |
2306 | case -EINPROGRESS: |
2307 | /* SYN_SENT! */ | |
fe19a96b TM |
2308 | if (xprt->reestablish_timeout < XS_TCP_INIT_REEST_TO) |
2309 | xprt->reestablish_timeout = XS_TCP_INIT_REEST_TO; | |
1f4c17a0 TM |
2310 | break; |
2311 | case -EADDRNOTAVAIL: | |
2312 | /* Source port number is unavailable. Try a new one! */ | |
2313 | transport->srcport = 0; | |
fe19a96b TM |
2314 | } |
2315 | out: | |
2316 | return ret; | |
16be2d20 CL |
2317 | } |
2318 | ||
9903cd1c | 2319 | /** |
b61d59ff | 2320 | * xs_tcp_setup_socket - create a TCP socket and connect to a remote endpoint |
9903cd1c CL |
2321 | * |
2322 | * Invoked by a work queue tasklet. | |
a246b010 | 2323 | */ |
cdd518d5 | 2324 | static void xs_tcp_setup_socket(struct work_struct *work) |
a246b010 | 2325 | { |
cdd518d5 PE |
2326 | struct sock_xprt *transport = |
2327 | container_of(work, struct sock_xprt, connect_worker.work); | |
ee0ac0c2 | 2328 | struct socket *sock = transport->sock; |
a9f5f0f7 | 2329 | struct rpc_xprt *xprt = &transport->xprt; |
b61d59ff | 2330 | int status = -EIO; |
a246b010 | 2331 | |
ee0ac0c2 | 2332 | if (!sock) { |
cdd518d5 | 2333 | sock = xs_create_sock(xprt, transport, |
4dda9c8a TM |
2334 | xs_addr(xprt)->sa_family, SOCK_STREAM, |
2335 | IPPROTO_TCP, true); | |
b61d59ff TM |
2336 | if (IS_ERR(sock)) { |
2337 | status = PTR_ERR(sock); | |
3167e12c CL |
2338 | goto out; |
2339 | } | |
7d1e8255 | 2340 | } |
a246b010 | 2341 | |
c740eff8 CL |
2342 | dprintk("RPC: worker connecting xprt %p via %s to " |
2343 | "%s (port %s)\n", xprt, | |
2344 | xprt->address_strings[RPC_DISPLAY_PROTO], | |
2345 | xprt->address_strings[RPC_DISPLAY_ADDR], | |
2346 | xprt->address_strings[RPC_DISPLAY_PORT]); | |
edb267a6 | 2347 | |
16be2d20 | 2348 | status = xs_tcp_finish_connecting(xprt, sock); |
40b5ea0c | 2349 | trace_rpc_socket_connect(xprt, sock, status); |
46121cf7 CL |
2350 | dprintk("RPC: %p connect status %d connected %d sock state %d\n", |
2351 | xprt, -status, xprt_connected(xprt), | |
2352 | sock->sk->sk_state); | |
2a491991 | 2353 | switch (status) { |
f75e6745 TM |
2354 | default: |
2355 | printk("%s: connect returned unhandled error %d\n", | |
2356 | __func__, status); | |
2357 | case -EADDRNOTAVAIL: | |
2358 | /* We're probably in TIME_WAIT. Get rid of existing socket, | |
2359 | * and retry | |
2360 | */ | |
a519fc7a | 2361 | xs_tcp_force_close(xprt); |
88b5ed73 | 2362 | break; |
2a491991 TM |
2363 | case 0: |
2364 | case -EINPROGRESS: | |
2365 | case -EALREADY: | |
718ba5b8 | 2366 | xprt_unlock_connect(xprt, transport); |
7d1e8255 | 2367 | return; |
9fcfe0c8 TM |
2368 | case -EINVAL: |
2369 | /* Happens, for instance, if the user specified a link | |
2370 | * local IPv6 address without a scope-id. | |
2371 | */ | |
3ed5e2a2 TM |
2372 | case -ECONNREFUSED: |
2373 | case -ECONNRESET: | |
2374 | case -ENETUNREACH: | |
3913c78c | 2375 | case -EADDRINUSE: |
3601c4a9 | 2376 | case -ENOBUFS: |
3ed5e2a2 | 2377 | /* retry with existing socket, after a delay */ |
4efdd92c | 2378 | xs_tcp_force_close(xprt); |
9fcfe0c8 | 2379 | goto out; |
a246b010 | 2380 | } |
2a491991 | 2381 | status = -EAGAIN; |
a246b010 | 2382 | out: |
718ba5b8 | 2383 | xprt_unlock_connect(xprt, transport); |
68e220bd | 2384 | xprt_clear_connecting(xprt); |
7d1e8255 | 2385 | xprt_wake_pending_tasks(xprt, status); |
68e220bd | 2386 | } |
b0d93ad5 | 2387 | |
02910177 TM |
2388 | static unsigned long xs_reconnect_delay(const struct rpc_xprt *xprt) |
2389 | { | |
2390 | unsigned long start, now = jiffies; | |
2391 | ||
2392 | start = xprt->stat.connect_start + xprt->reestablish_timeout; | |
2393 | if (time_after(start, now)) | |
2394 | return start - now; | |
2395 | return 0; | |
2396 | } | |
2397 | ||
3851f1cd TM |
2398 | static void xs_reconnect_backoff(struct rpc_xprt *xprt) |
2399 | { | |
2400 | xprt->reestablish_timeout <<= 1; | |
2401 | if (xprt->reestablish_timeout > xprt->max_reconnect_timeout) | |
2402 | xprt->reestablish_timeout = xprt->max_reconnect_timeout; | |
2403 | if (xprt->reestablish_timeout < XS_TCP_INIT_REEST_TO) | |
2404 | xprt->reestablish_timeout = XS_TCP_INIT_REEST_TO; | |
2405 | } | |
2406 | ||
9903cd1c CL |
2407 | /** |
2408 | * xs_connect - connect a socket to a remote endpoint | |
1b092092 | 2409 | * @xprt: pointer to transport structure |
9903cd1c CL |
2410 | * @task: address of RPC task that manages state of connect request |
2411 | * | |
2412 | * TCP: If the remote end dropped the connection, delay reconnecting. | |
03bf4b70 CL |
2413 | * |
2414 | * UDP socket connects are synchronous, but we use a work queue anyway | |
2415 | * to guarantee that even unprivileged user processes can set up a | |
2416 | * socket on a privileged port. | |
2417 | * | |
2418 | * If a UDP socket connect fails, the delay behavior here prevents | |
2419 | * retry floods (hard mounts). | |
9903cd1c | 2420 | */ |
1b092092 | 2421 | static void xs_connect(struct rpc_xprt *xprt, struct rpc_task *task) |
a246b010 | 2422 | { |
ee0ac0c2 | 2423 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
02910177 | 2424 | unsigned long delay = 0; |
a246b010 | 2425 | |
718ba5b8 TM |
2426 | WARN_ON_ONCE(!xprt_lock_connect(xprt, task, transport)); |
2427 | ||
99b1a4c3 | 2428 | if (transport->sock != NULL) { |
46121cf7 CL |
2429 | dprintk("RPC: xs_connect delayed xprt %p for %lu " |
2430 | "seconds\n", | |
03bf4b70 | 2431 | xprt, xprt->reestablish_timeout / HZ); |
99b1a4c3 TM |
2432 | |
2433 | /* Start by resetting any existing state */ | |
2434 | xs_reset_transport(transport); | |
2435 | ||
02910177 | 2436 | delay = xs_reconnect_delay(xprt); |
3851f1cd | 2437 | xs_reconnect_backoff(xprt); |
02910177 | 2438 | |
02910177 | 2439 | } else |
46121cf7 | 2440 | dprintk("RPC: xs_connect scheduled xprt %p\n", xprt); |
02910177 TM |
2441 | |
2442 | queue_delayed_work(xprtiod_workqueue, | |
2443 | &transport->connect_worker, | |
2444 | delay); | |
a246b010 CL |
2445 | } |
2446 | ||
176e21ee CL |
2447 | /** |
2448 | * xs_local_print_stats - display AF_LOCAL socket-specifc stats | |
2449 | * @xprt: rpc_xprt struct containing statistics | |
2450 | * @seq: output file | |
2451 | * | |
2452 | */ | |
2453 | static void xs_local_print_stats(struct rpc_xprt *xprt, struct seq_file *seq) | |
2454 | { | |
2455 | long idle_time = 0; | |
2456 | ||
2457 | if (xprt_connected(xprt)) | |
2458 | idle_time = (long)(jiffies - xprt->last_used) / HZ; | |
2459 | ||
2460 | seq_printf(seq, "\txprt:\tlocal %lu %lu %lu %ld %lu %lu %lu " | |
15a45206 | 2461 | "%llu %llu %lu %llu %llu\n", |
176e21ee CL |
2462 | xprt->stat.bind_count, |
2463 | xprt->stat.connect_count, | |
2464 | xprt->stat.connect_time, | |
2465 | idle_time, | |
2466 | xprt->stat.sends, | |
2467 | xprt->stat.recvs, | |
2468 | xprt->stat.bad_xids, | |
2469 | xprt->stat.req_u, | |
15a45206 AA |
2470 | xprt->stat.bklog_u, |
2471 | xprt->stat.max_slots, | |
2472 | xprt->stat.sending_u, | |
2473 | xprt->stat.pending_u); | |
176e21ee CL |
2474 | } |
2475 | ||
262ca07d CL |
2476 | /** |
2477 | * xs_udp_print_stats - display UDP socket-specifc stats | |
2478 | * @xprt: rpc_xprt struct containing statistics | |
2479 | * @seq: output file | |
2480 | * | |
2481 | */ | |
2482 | static void xs_udp_print_stats(struct rpc_xprt *xprt, struct seq_file *seq) | |
2483 | { | |
c8475461 CL |
2484 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
2485 | ||
15a45206 AA |
2486 | seq_printf(seq, "\txprt:\tudp %u %lu %lu %lu %lu %llu %llu " |
2487 | "%lu %llu %llu\n", | |
fbfffbd5 | 2488 | transport->srcport, |
262ca07d CL |
2489 | xprt->stat.bind_count, |
2490 | xprt->stat.sends, | |
2491 | xprt->stat.recvs, | |
2492 | xprt->stat.bad_xids, | |
2493 | xprt->stat.req_u, | |
15a45206 AA |
2494 | xprt->stat.bklog_u, |
2495 | xprt->stat.max_slots, | |
2496 | xprt->stat.sending_u, | |
2497 | xprt->stat.pending_u); | |
262ca07d CL |
2498 | } |
2499 | ||
2500 | /** | |
2501 | * xs_tcp_print_stats - display TCP socket-specifc stats | |
2502 | * @xprt: rpc_xprt struct containing statistics | |
2503 | * @seq: output file | |
2504 | * | |
2505 | */ | |
2506 | static void xs_tcp_print_stats(struct rpc_xprt *xprt, struct seq_file *seq) | |
2507 | { | |
c8475461 | 2508 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
262ca07d CL |
2509 | long idle_time = 0; |
2510 | ||
2511 | if (xprt_connected(xprt)) | |
2512 | idle_time = (long)(jiffies - xprt->last_used) / HZ; | |
2513 | ||
15a45206 AA |
2514 | seq_printf(seq, "\txprt:\ttcp %u %lu %lu %lu %ld %lu %lu %lu " |
2515 | "%llu %llu %lu %llu %llu\n", | |
fbfffbd5 | 2516 | transport->srcport, |
262ca07d CL |
2517 | xprt->stat.bind_count, |
2518 | xprt->stat.connect_count, | |
2519 | xprt->stat.connect_time, | |
2520 | idle_time, | |
2521 | xprt->stat.sends, | |
2522 | xprt->stat.recvs, | |
2523 | xprt->stat.bad_xids, | |
2524 | xprt->stat.req_u, | |
15a45206 AA |
2525 | xprt->stat.bklog_u, |
2526 | xprt->stat.max_slots, | |
2527 | xprt->stat.sending_u, | |
2528 | xprt->stat.pending_u); | |
262ca07d CL |
2529 | } |
2530 | ||
4cfc7e60 RI |
2531 | /* |
2532 | * Allocate a bunch of pages for a scratch buffer for the rpc code. The reason | |
2533 | * we allocate pages instead doing a kmalloc like rpc_malloc is because we want | |
2534 | * to use the server side send routines. | |
2535 | */ | |
5a51f13a | 2536 | static void *bc_malloc(struct rpc_task *task, size_t size) |
4cfc7e60 RI |
2537 | { |
2538 | struct page *page; | |
2539 | struct rpc_buffer *buf; | |
2540 | ||
b8a13d03 WAA |
2541 | WARN_ON_ONCE(size > PAGE_SIZE - sizeof(struct rpc_buffer)); |
2542 | if (size > PAGE_SIZE - sizeof(struct rpc_buffer)) | |
2543 | return NULL; | |
4cfc7e60 | 2544 | |
b8a13d03 | 2545 | page = alloc_page(GFP_KERNEL); |
4cfc7e60 RI |
2546 | if (!page) |
2547 | return NULL; | |
2548 | ||
2549 | buf = page_address(page); | |
2550 | buf->len = PAGE_SIZE; | |
2551 | ||
2552 | return buf->data; | |
2553 | } | |
2554 | ||
2555 | /* | |
2556 | * Free the space allocated in the bc_alloc routine | |
2557 | */ | |
5a51f13a | 2558 | static void bc_free(void *buffer) |
4cfc7e60 RI |
2559 | { |
2560 | struct rpc_buffer *buf; | |
2561 | ||
2562 | if (!buffer) | |
2563 | return; | |
2564 | ||
2565 | buf = container_of(buffer, struct rpc_buffer, data); | |
2566 | free_page((unsigned long)buf); | |
2567 | } | |
2568 | ||
2569 | /* | |
2570 | * Use the svc_sock to send the callback. Must be called with svsk->sk_mutex | |
2571 | * held. Borrows heavily from svc_tcp_sendto and xs_tcp_send_request. | |
2572 | */ | |
2573 | static int bc_sendto(struct rpc_rqst *req) | |
2574 | { | |
2575 | int len; | |
2576 | struct xdr_buf *xbufp = &req->rq_snd_buf; | |
2577 | struct rpc_xprt *xprt = req->rq_xprt; | |
2578 | struct sock_xprt *transport = | |
2579 | container_of(xprt, struct sock_xprt, xprt); | |
2580 | struct socket *sock = transport->sock; | |
2581 | unsigned long headoff; | |
2582 | unsigned long tailoff; | |
2583 | ||
61677eee | 2584 | xs_encode_stream_record_marker(xbufp); |
4cfc7e60 RI |
2585 | |
2586 | tailoff = (unsigned long)xbufp->tail[0].iov_base & ~PAGE_MASK; | |
2587 | headoff = (unsigned long)xbufp->head[0].iov_base & ~PAGE_MASK; | |
2588 | len = svc_send_common(sock, xbufp, | |
2589 | virt_to_page(xbufp->head[0].iov_base), headoff, | |
2590 | xbufp->tail[0].iov_base, tailoff); | |
2591 | ||
2592 | if (len != xbufp->len) { | |
2593 | printk(KERN_NOTICE "Error sending entire callback!\n"); | |
2594 | len = -EAGAIN; | |
2595 | } | |
2596 | ||
2597 | return len; | |
2598 | } | |
2599 | ||
2600 | /* | |
2601 | * The send routine. Borrows from svc_send | |
2602 | */ | |
2603 | static int bc_send_request(struct rpc_task *task) | |
2604 | { | |
2605 | struct rpc_rqst *req = task->tk_rqstp; | |
2606 | struct svc_xprt *xprt; | |
7fc56136 | 2607 | int len; |
4cfc7e60 RI |
2608 | |
2609 | dprintk("sending request with xid: %08x\n", ntohl(req->rq_xid)); | |
2610 | /* | |
2611 | * Get the server socket associated with this callback xprt | |
2612 | */ | |
2613 | xprt = req->rq_xprt->bc_xprt; | |
4cfc7e60 RI |
2614 | |
2615 | /* | |
2616 | * Grab the mutex to serialize data as the connection is shared | |
2617 | * with the fore channel | |
2618 | */ | |
2619 | if (!mutex_trylock(&xprt->xpt_mutex)) { | |
2620 | rpc_sleep_on(&xprt->xpt_bc_pending, task, NULL); | |
2621 | if (!mutex_trylock(&xprt->xpt_mutex)) | |
2622 | return -EAGAIN; | |
2623 | rpc_wake_up_queued_task(&xprt->xpt_bc_pending, task); | |
2624 | } | |
2625 | if (test_bit(XPT_DEAD, &xprt->xpt_flags)) | |
2626 | len = -ENOTCONN; | |
2627 | else | |
2628 | len = bc_sendto(req); | |
2629 | mutex_unlock(&xprt->xpt_mutex); | |
2630 | ||
2631 | if (len > 0) | |
2632 | len = 0; | |
2633 | ||
2634 | return len; | |
2635 | } | |
2636 | ||
2637 | /* | |
2638 | * The close routine. Since this is client initiated, we do nothing | |
2639 | */ | |
2640 | ||
2641 | static void bc_close(struct rpc_xprt *xprt) | |
2642 | { | |
4cfc7e60 RI |
2643 | } |
2644 | ||
2645 | /* | |
2646 | * The xprt destroy routine. Again, because this connection is client | |
2647 | * initiated, we do nothing | |
2648 | */ | |
2649 | ||
2650 | static void bc_destroy(struct rpc_xprt *xprt) | |
2651 | { | |
47f72efa KM |
2652 | dprintk("RPC: bc_destroy xprt %p\n", xprt); |
2653 | ||
2654 | xs_xprt_free(xprt); | |
2655 | module_put(THIS_MODULE); | |
4cfc7e60 RI |
2656 | } |
2657 | ||
176e21ee CL |
2658 | static struct rpc_xprt_ops xs_local_ops = { |
2659 | .reserve_xprt = xprt_reserve_xprt, | |
2660 | .release_xprt = xs_tcp_release_xprt, | |
f39c1bfb | 2661 | .alloc_slot = xprt_alloc_slot, |
176e21ee CL |
2662 | .rpcbind = xs_local_rpcbind, |
2663 | .set_port = xs_local_set_port, | |
dc107402 | 2664 | .connect = xs_local_connect, |
176e21ee CL |
2665 | .buf_alloc = rpc_malloc, |
2666 | .buf_free = rpc_free, | |
2667 | .send_request = xs_local_send_request, | |
2668 | .set_retrans_timeout = xprt_set_retrans_timeout_def, | |
2669 | .close = xs_close, | |
a1311d87 | 2670 | .destroy = xs_destroy, |
176e21ee | 2671 | .print_stats = xs_local_print_stats, |
d67fa4d8 JL |
2672 | .enable_swap = xs_enable_swap, |
2673 | .disable_swap = xs_disable_swap, | |
176e21ee CL |
2674 | }; |
2675 | ||
262965f5 | 2676 | static struct rpc_xprt_ops xs_udp_ops = { |
43118c29 | 2677 | .set_buffer_size = xs_udp_set_buffer_size, |
12a80469 | 2678 | .reserve_xprt = xprt_reserve_xprt_cong, |
49e9a890 | 2679 | .release_xprt = xprt_release_xprt_cong, |
f39c1bfb | 2680 | .alloc_slot = xprt_alloc_slot, |
45160d62 | 2681 | .rpcbind = rpcb_getport_async, |
92200412 | 2682 | .set_port = xs_set_port, |
262965f5 | 2683 | .connect = xs_connect, |
02107148 CL |
2684 | .buf_alloc = rpc_malloc, |
2685 | .buf_free = rpc_free, | |
262965f5 | 2686 | .send_request = xs_udp_send_request, |
fe3aca29 | 2687 | .set_retrans_timeout = xprt_set_retrans_timeout_rtt, |
46c0ee8b | 2688 | .timer = xs_udp_timer, |
a58dd398 | 2689 | .release_request = xprt_release_rqst_cong, |
262965f5 CL |
2690 | .close = xs_close, |
2691 | .destroy = xs_destroy, | |
262ca07d | 2692 | .print_stats = xs_udp_print_stats, |
d67fa4d8 JL |
2693 | .enable_swap = xs_enable_swap, |
2694 | .disable_swap = xs_disable_swap, | |
4a068258 | 2695 | .inject_disconnect = xs_inject_disconnect, |
262965f5 CL |
2696 | }; |
2697 | ||
2698 | static struct rpc_xprt_ops xs_tcp_ops = { | |
12a80469 | 2699 | .reserve_xprt = xprt_reserve_xprt, |
e0ab53de | 2700 | .release_xprt = xs_tcp_release_xprt, |
f39c1bfb | 2701 | .alloc_slot = xprt_lock_and_alloc_slot, |
45160d62 | 2702 | .rpcbind = rpcb_getport_async, |
92200412 | 2703 | .set_port = xs_set_port, |
0b9e7943 | 2704 | .connect = xs_connect, |
02107148 CL |
2705 | .buf_alloc = rpc_malloc, |
2706 | .buf_free = rpc_free, | |
262965f5 | 2707 | .send_request = xs_tcp_send_request, |
fe3aca29 | 2708 | .set_retrans_timeout = xprt_set_retrans_timeout_def, |
c627d31b | 2709 | .close = xs_tcp_shutdown, |
9903cd1c | 2710 | .destroy = xs_destroy, |
262ca07d | 2711 | .print_stats = xs_tcp_print_stats, |
d67fa4d8 JL |
2712 | .enable_swap = xs_enable_swap, |
2713 | .disable_swap = xs_disable_swap, | |
4a068258 | 2714 | .inject_disconnect = xs_inject_disconnect, |
42e5c3e2 CL |
2715 | #ifdef CONFIG_SUNRPC_BACKCHANNEL |
2716 | .bc_setup = xprt_setup_bc, | |
76566773 | 2717 | .bc_up = xs_tcp_bc_up, |
6b26cc8c | 2718 | .bc_maxpayload = xs_tcp_bc_maxpayload, |
42e5c3e2 CL |
2719 | .bc_free_rqst = xprt_free_bc_rqst, |
2720 | .bc_destroy = xprt_destroy_bc, | |
2721 | #endif | |
a246b010 CL |
2722 | }; |
2723 | ||
4cfc7e60 RI |
2724 | /* |
2725 | * The rpc_xprt_ops for the server backchannel | |
2726 | */ | |
2727 | ||
2728 | static struct rpc_xprt_ops bc_tcp_ops = { | |
2729 | .reserve_xprt = xprt_reserve_xprt, | |
2730 | .release_xprt = xprt_release_xprt, | |
84e28a30 | 2731 | .alloc_slot = xprt_alloc_slot, |
4cfc7e60 RI |
2732 | .buf_alloc = bc_malloc, |
2733 | .buf_free = bc_free, | |
2734 | .send_request = bc_send_request, | |
2735 | .set_retrans_timeout = xprt_set_retrans_timeout_def, | |
2736 | .close = bc_close, | |
2737 | .destroy = bc_destroy, | |
2738 | .print_stats = xs_tcp_print_stats, | |
d67fa4d8 JL |
2739 | .enable_swap = xs_enable_swap, |
2740 | .disable_swap = xs_disable_swap, | |
4a068258 | 2741 | .inject_disconnect = xs_inject_disconnect, |
4cfc7e60 RI |
2742 | }; |
2743 | ||
92476850 CL |
2744 | static int xs_init_anyaddr(const int family, struct sockaddr *sap) |
2745 | { | |
2746 | static const struct sockaddr_in sin = { | |
2747 | .sin_family = AF_INET, | |
2748 | .sin_addr.s_addr = htonl(INADDR_ANY), | |
2749 | }; | |
2750 | static const struct sockaddr_in6 sin6 = { | |
2751 | .sin6_family = AF_INET6, | |
2752 | .sin6_addr = IN6ADDR_ANY_INIT, | |
2753 | }; | |
2754 | ||
2755 | switch (family) { | |
176e21ee CL |
2756 | case AF_LOCAL: |
2757 | break; | |
92476850 CL |
2758 | case AF_INET: |
2759 | memcpy(sap, &sin, sizeof(sin)); | |
2760 | break; | |
2761 | case AF_INET6: | |
2762 | memcpy(sap, &sin6, sizeof(sin6)); | |
2763 | break; | |
2764 | default: | |
2765 | dprintk("RPC: %s: Bad address family\n", __func__); | |
2766 | return -EAFNOSUPPORT; | |
2767 | } | |
2768 | return 0; | |
2769 | } | |
2770 | ||
3c341b0b | 2771 | static struct rpc_xprt *xs_setup_xprt(struct xprt_create *args, |
d9ba131d TM |
2772 | unsigned int slot_table_size, |
2773 | unsigned int max_slot_table_size) | |
c8541ecd CL |
2774 | { |
2775 | struct rpc_xprt *xprt; | |
ffc2e518 | 2776 | struct sock_xprt *new; |
c8541ecd | 2777 | |
96802a09 | 2778 | if (args->addrlen > sizeof(xprt->addr)) { |
46121cf7 | 2779 | dprintk("RPC: xs_setup_xprt: address too large\n"); |
c8541ecd CL |
2780 | return ERR_PTR(-EBADF); |
2781 | } | |
2782 | ||
d9ba131d TM |
2783 | xprt = xprt_alloc(args->net, sizeof(*new), slot_table_size, |
2784 | max_slot_table_size); | |
bd1722d4 | 2785 | if (xprt == NULL) { |
46121cf7 CL |
2786 | dprintk("RPC: xs_setup_xprt: couldn't allocate " |
2787 | "rpc_xprt\n"); | |
c8541ecd CL |
2788 | return ERR_PTR(-ENOMEM); |
2789 | } | |
c8541ecd | 2790 | |
bd1722d4 | 2791 | new = container_of(xprt, struct sock_xprt, xprt); |
edc1b01c | 2792 | mutex_init(&new->recv_mutex); |
96802a09 FM |
2793 | memcpy(&xprt->addr, args->dstaddr, args->addrlen); |
2794 | xprt->addrlen = args->addrlen; | |
d3bc9a1d | 2795 | if (args->srcaddr) |
fbfffbd5 | 2796 | memcpy(&new->srcaddr, args->srcaddr, args->addrlen); |
92476850 CL |
2797 | else { |
2798 | int err; | |
2799 | err = xs_init_anyaddr(args->dstaddr->sa_family, | |
2800 | (struct sockaddr *)&new->srcaddr); | |
2aa13531 SK |
2801 | if (err != 0) { |
2802 | xprt_free(xprt); | |
92476850 | 2803 | return ERR_PTR(err); |
2aa13531 | 2804 | } |
92476850 | 2805 | } |
c8541ecd CL |
2806 | |
2807 | return xprt; | |
2808 | } | |
2809 | ||
176e21ee CL |
2810 | static const struct rpc_timeout xs_local_default_timeout = { |
2811 | .to_initval = 10 * HZ, | |
2812 | .to_maxval = 10 * HZ, | |
2813 | .to_retries = 2, | |
2814 | }; | |
2815 | ||
2816 | /** | |
2817 | * xs_setup_local - Set up transport to use an AF_LOCAL socket | |
2818 | * @args: rpc transport creation arguments | |
2819 | * | |
2820 | * AF_LOCAL is a "tpi_cots_ord" transport, just like TCP | |
2821 | */ | |
2822 | static struct rpc_xprt *xs_setup_local(struct xprt_create *args) | |
2823 | { | |
2824 | struct sockaddr_un *sun = (struct sockaddr_un *)args->dstaddr; | |
2825 | struct sock_xprt *transport; | |
2826 | struct rpc_xprt *xprt; | |
2827 | struct rpc_xprt *ret; | |
2828 | ||
d9ba131d TM |
2829 | xprt = xs_setup_xprt(args, xprt_tcp_slot_table_entries, |
2830 | xprt_max_tcp_slot_table_entries); | |
176e21ee CL |
2831 | if (IS_ERR(xprt)) |
2832 | return xprt; | |
2833 | transport = container_of(xprt, struct sock_xprt, xprt); | |
2834 | ||
2835 | xprt->prot = 0; | |
2836 | xprt->tsh_size = sizeof(rpc_fraghdr) / sizeof(u32); | |
2837 | xprt->max_payload = RPC_MAX_FRAGMENT_SIZE; | |
2838 | ||
2839 | xprt->bind_timeout = XS_BIND_TO; | |
2840 | xprt->reestablish_timeout = XS_TCP_INIT_REEST_TO; | |
2841 | xprt->idle_timeout = XS_IDLE_DISC_TO; | |
2842 | ||
2843 | xprt->ops = &xs_local_ops; | |
2844 | xprt->timeout = &xs_local_default_timeout; | |
2845 | ||
a2648094 | 2846 | INIT_WORK(&transport->recv_worker, xs_local_data_receive_workfn); |
93dc41bd N |
2847 | INIT_DELAYED_WORK(&transport->connect_worker, |
2848 | xs_dummy_setup_socket); | |
2849 | ||
176e21ee CL |
2850 | switch (sun->sun_family) { |
2851 | case AF_LOCAL: | |
2852 | if (sun->sun_path[0] != '/') { | |
2853 | dprintk("RPC: bad AF_LOCAL address: %s\n", | |
2854 | sun->sun_path); | |
2855 | ret = ERR_PTR(-EINVAL); | |
2856 | goto out_err; | |
2857 | } | |
2858 | xprt_set_bound(xprt); | |
176e21ee | 2859 | xs_format_peer_addresses(xprt, "local", RPCBIND_NETID_LOCAL); |
7073ea87 BF |
2860 | ret = ERR_PTR(xs_local_setup_socket(transport)); |
2861 | if (ret) | |
2862 | goto out_err; | |
176e21ee CL |
2863 | break; |
2864 | default: | |
2865 | ret = ERR_PTR(-EAFNOSUPPORT); | |
2866 | goto out_err; | |
2867 | } | |
2868 | ||
2869 | dprintk("RPC: set up xprt to %s via AF_LOCAL\n", | |
2870 | xprt->address_strings[RPC_DISPLAY_ADDR]); | |
2871 | ||
2872 | if (try_module_get(THIS_MODULE)) | |
2873 | return xprt; | |
2874 | ret = ERR_PTR(-EINVAL); | |
2875 | out_err: | |
315f3812 | 2876 | xs_xprt_free(xprt); |
176e21ee CL |
2877 | return ret; |
2878 | } | |
2879 | ||
2881ae74 TM |
2880 | static const struct rpc_timeout xs_udp_default_timeout = { |
2881 | .to_initval = 5 * HZ, | |
2882 | .to_maxval = 30 * HZ, | |
2883 | .to_increment = 5 * HZ, | |
2884 | .to_retries = 5, | |
2885 | }; | |
2886 | ||
9903cd1c CL |
2887 | /** |
2888 | * xs_setup_udp - Set up transport to use a UDP socket | |
96802a09 | 2889 | * @args: rpc transport creation arguments |
9903cd1c CL |
2890 | * |
2891 | */ | |
483066d6 | 2892 | static struct rpc_xprt *xs_setup_udp(struct xprt_create *args) |
a246b010 | 2893 | { |
8f9d5b1a | 2894 | struct sockaddr *addr = args->dstaddr; |
c8541ecd | 2895 | struct rpc_xprt *xprt; |
c8475461 | 2896 | struct sock_xprt *transport; |
0a68b0be | 2897 | struct rpc_xprt *ret; |
a246b010 | 2898 | |
d9ba131d TM |
2899 | xprt = xs_setup_xprt(args, xprt_udp_slot_table_entries, |
2900 | xprt_udp_slot_table_entries); | |
c8541ecd CL |
2901 | if (IS_ERR(xprt)) |
2902 | return xprt; | |
c8475461 | 2903 | transport = container_of(xprt, struct sock_xprt, xprt); |
a246b010 | 2904 | |
ec739ef0 | 2905 | xprt->prot = IPPROTO_UDP; |
808012fb | 2906 | xprt->tsh_size = 0; |
a246b010 CL |
2907 | /* XXX: header size can vary due to auth type, IPv6, etc. */ |
2908 | xprt->max_payload = (1U << 16) - (MAX_HEADER << 3); | |
2909 | ||
03bf4b70 | 2910 | xprt->bind_timeout = XS_BIND_TO; |
03bf4b70 CL |
2911 | xprt->reestablish_timeout = XS_UDP_REEST_TO; |
2912 | xprt->idle_timeout = XS_IDLE_DISC_TO; | |
a246b010 | 2913 | |
262965f5 | 2914 | xprt->ops = &xs_udp_ops; |
a246b010 | 2915 | |
ba7392bb | 2916 | xprt->timeout = &xs_udp_default_timeout; |
a246b010 | 2917 | |
f9b2ee71 | 2918 | INIT_WORK(&transport->recv_worker, xs_udp_data_receive_workfn); |
edc1b01c TM |
2919 | INIT_DELAYED_WORK(&transport->connect_worker, xs_udp_setup_socket); |
2920 | ||
8f9d5b1a CL |
2921 | switch (addr->sa_family) { |
2922 | case AF_INET: | |
2923 | if (((struct sockaddr_in *)addr)->sin_port != htons(0)) | |
2924 | xprt_set_bound(xprt); | |
2925 | ||
9dc3b095 | 2926 | xs_format_peer_addresses(xprt, "udp", RPCBIND_NETID_UDP); |
8f9d5b1a CL |
2927 | break; |
2928 | case AF_INET6: | |
2929 | if (((struct sockaddr_in6 *)addr)->sin6_port != htons(0)) | |
2930 | xprt_set_bound(xprt); | |
2931 | ||
9dc3b095 | 2932 | xs_format_peer_addresses(xprt, "udp", RPCBIND_NETID_UDP6); |
8f9d5b1a CL |
2933 | break; |
2934 | default: | |
0a68b0be BF |
2935 | ret = ERR_PTR(-EAFNOSUPPORT); |
2936 | goto out_err; | |
8f9d5b1a CL |
2937 | } |
2938 | ||
c740eff8 CL |
2939 | if (xprt_bound(xprt)) |
2940 | dprintk("RPC: set up xprt to %s (port %s) via %s\n", | |
2941 | xprt->address_strings[RPC_DISPLAY_ADDR], | |
2942 | xprt->address_strings[RPC_DISPLAY_PORT], | |
2943 | xprt->address_strings[RPC_DISPLAY_PROTO]); | |
2944 | else | |
2945 | dprintk("RPC: set up xprt to %s (autobind) via %s\n", | |
2946 | xprt->address_strings[RPC_DISPLAY_ADDR], | |
2947 | xprt->address_strings[RPC_DISPLAY_PROTO]); | |
edb267a6 | 2948 | |
bc25571e TT |
2949 | if (try_module_get(THIS_MODULE)) |
2950 | return xprt; | |
0a68b0be BF |
2951 | ret = ERR_PTR(-EINVAL); |
2952 | out_err: | |
315f3812 | 2953 | xs_xprt_free(xprt); |
0a68b0be | 2954 | return ret; |
a246b010 CL |
2955 | } |
2956 | ||
2881ae74 TM |
2957 | static const struct rpc_timeout xs_tcp_default_timeout = { |
2958 | .to_initval = 60 * HZ, | |
2959 | .to_maxval = 60 * HZ, | |
2960 | .to_retries = 2, | |
2961 | }; | |
2962 | ||
9903cd1c CL |
2963 | /** |
2964 | * xs_setup_tcp - Set up transport to use a TCP socket | |
96802a09 | 2965 | * @args: rpc transport creation arguments |
9903cd1c CL |
2966 | * |
2967 | */ | |
483066d6 | 2968 | static struct rpc_xprt *xs_setup_tcp(struct xprt_create *args) |
a246b010 | 2969 | { |
8f9d5b1a | 2970 | struct sockaddr *addr = args->dstaddr; |
c8541ecd | 2971 | struct rpc_xprt *xprt; |
c8475461 | 2972 | struct sock_xprt *transport; |
0a68b0be | 2973 | struct rpc_xprt *ret; |
b7993ceb TM |
2974 | unsigned int max_slot_table_size = xprt_max_tcp_slot_table_entries; |
2975 | ||
2976 | if (args->flags & XPRT_CREATE_INFINITE_SLOTS) | |
2977 | max_slot_table_size = RPC_MAX_SLOT_TABLE_LIMIT; | |
a246b010 | 2978 | |
d9ba131d | 2979 | xprt = xs_setup_xprt(args, xprt_tcp_slot_table_entries, |
b7993ceb | 2980 | max_slot_table_size); |
c8541ecd CL |
2981 | if (IS_ERR(xprt)) |
2982 | return xprt; | |
c8475461 | 2983 | transport = container_of(xprt, struct sock_xprt, xprt); |
a246b010 | 2984 | |
ec739ef0 | 2985 | xprt->prot = IPPROTO_TCP; |
808012fb | 2986 | xprt->tsh_size = sizeof(rpc_fraghdr) / sizeof(u32); |
808012fb | 2987 | xprt->max_payload = RPC_MAX_FRAGMENT_SIZE; |
a246b010 | 2988 | |
03bf4b70 | 2989 | xprt->bind_timeout = XS_BIND_TO; |
03bf4b70 CL |
2990 | xprt->reestablish_timeout = XS_TCP_INIT_REEST_TO; |
2991 | xprt->idle_timeout = XS_IDLE_DISC_TO; | |
a246b010 | 2992 | |
262965f5 | 2993 | xprt->ops = &xs_tcp_ops; |
ba7392bb | 2994 | xprt->timeout = &xs_tcp_default_timeout; |
a246b010 | 2995 | |
3851f1cd TM |
2996 | xprt->max_reconnect_timeout = xprt->timeout->to_maxval; |
2997 | ||
edc1b01c TM |
2998 | INIT_WORK(&transport->recv_worker, xs_tcp_data_receive_workfn); |
2999 | INIT_DELAYED_WORK(&transport->connect_worker, xs_tcp_setup_socket); | |
3000 | ||
8f9d5b1a CL |
3001 | switch (addr->sa_family) { |
3002 | case AF_INET: | |
3003 | if (((struct sockaddr_in *)addr)->sin_port != htons(0)) | |
3004 | xprt_set_bound(xprt); | |
3005 | ||
9dc3b095 | 3006 | xs_format_peer_addresses(xprt, "tcp", RPCBIND_NETID_TCP); |
8f9d5b1a CL |
3007 | break; |
3008 | case AF_INET6: | |
3009 | if (((struct sockaddr_in6 *)addr)->sin6_port != htons(0)) | |
3010 | xprt_set_bound(xprt); | |
3011 | ||
9dc3b095 | 3012 | xs_format_peer_addresses(xprt, "tcp", RPCBIND_NETID_TCP6); |
8f9d5b1a CL |
3013 | break; |
3014 | default: | |
0a68b0be BF |
3015 | ret = ERR_PTR(-EAFNOSUPPORT); |
3016 | goto out_err; | |
8f9d5b1a CL |
3017 | } |
3018 | ||
c740eff8 CL |
3019 | if (xprt_bound(xprt)) |
3020 | dprintk("RPC: set up xprt to %s (port %s) via %s\n", | |
3021 | xprt->address_strings[RPC_DISPLAY_ADDR], | |
3022 | xprt->address_strings[RPC_DISPLAY_PORT], | |
3023 | xprt->address_strings[RPC_DISPLAY_PROTO]); | |
3024 | else | |
3025 | dprintk("RPC: set up xprt to %s (autobind) via %s\n", | |
3026 | xprt->address_strings[RPC_DISPLAY_ADDR], | |
3027 | xprt->address_strings[RPC_DISPLAY_PROTO]); | |
3028 | ||
bc25571e TT |
3029 | if (try_module_get(THIS_MODULE)) |
3030 | return xprt; | |
0a68b0be BF |
3031 | ret = ERR_PTR(-EINVAL); |
3032 | out_err: | |
315f3812 | 3033 | xs_xprt_free(xprt); |
0a68b0be | 3034 | return ret; |
a246b010 | 3035 | } |
282b32e1 | 3036 | |
f300baba AB |
3037 | /** |
3038 | * xs_setup_bc_tcp - Set up transport to use a TCP backchannel socket | |
3039 | * @args: rpc transport creation arguments | |
3040 | * | |
3041 | */ | |
3042 | static struct rpc_xprt *xs_setup_bc_tcp(struct xprt_create *args) | |
3043 | { | |
3044 | struct sockaddr *addr = args->dstaddr; | |
3045 | struct rpc_xprt *xprt; | |
3046 | struct sock_xprt *transport; | |
3047 | struct svc_sock *bc_sock; | |
0a68b0be | 3048 | struct rpc_xprt *ret; |
f300baba | 3049 | |
d9ba131d TM |
3050 | xprt = xs_setup_xprt(args, xprt_tcp_slot_table_entries, |
3051 | xprt_tcp_slot_table_entries); | |
f300baba AB |
3052 | if (IS_ERR(xprt)) |
3053 | return xprt; | |
3054 | transport = container_of(xprt, struct sock_xprt, xprt); | |
3055 | ||
3056 | xprt->prot = IPPROTO_TCP; | |
3057 | xprt->tsh_size = sizeof(rpc_fraghdr) / sizeof(u32); | |
3058 | xprt->max_payload = RPC_MAX_FRAGMENT_SIZE; | |
3059 | xprt->timeout = &xs_tcp_default_timeout; | |
3060 | ||
3061 | /* backchannel */ | |
3062 | xprt_set_bound(xprt); | |
3063 | xprt->bind_timeout = 0; | |
f300baba AB |
3064 | xprt->reestablish_timeout = 0; |
3065 | xprt->idle_timeout = 0; | |
3066 | ||
f300baba AB |
3067 | xprt->ops = &bc_tcp_ops; |
3068 | ||
3069 | switch (addr->sa_family) { | |
3070 | case AF_INET: | |
3071 | xs_format_peer_addresses(xprt, "tcp", | |
3072 | RPCBIND_NETID_TCP); | |
3073 | break; | |
3074 | case AF_INET6: | |
3075 | xs_format_peer_addresses(xprt, "tcp", | |
3076 | RPCBIND_NETID_TCP6); | |
3077 | break; | |
3078 | default: | |
0a68b0be BF |
3079 | ret = ERR_PTR(-EAFNOSUPPORT); |
3080 | goto out_err; | |
f300baba AB |
3081 | } |
3082 | ||
50fa0d40 PE |
3083 | dprintk("RPC: set up xprt to %s (port %s) via %s\n", |
3084 | xprt->address_strings[RPC_DISPLAY_ADDR], | |
3085 | xprt->address_strings[RPC_DISPLAY_PORT], | |
3086 | xprt->address_strings[RPC_DISPLAY_PROTO]); | |
f300baba | 3087 | |
99de8ea9 BF |
3088 | /* |
3089 | * Once we've associated a backchannel xprt with a connection, | |
28303ca3 WM |
3090 | * we want to keep it around as long as the connection lasts, |
3091 | * in case we need to start using it for a backchannel again; | |
3092 | * this reference won't be dropped until bc_xprt is destroyed. | |
99de8ea9 BF |
3093 | */ |
3094 | xprt_get(xprt); | |
3095 | args->bc_xprt->xpt_bc_xprt = xprt; | |
3096 | xprt->bc_xprt = args->bc_xprt; | |
3097 | bc_sock = container_of(args->bc_xprt, struct svc_sock, sk_xprt); | |
3098 | transport->sock = bc_sock->sk_sock; | |
3099 | transport->inet = bc_sock->sk_sk; | |
3100 | ||
f300baba AB |
3101 | /* |
3102 | * Since we don't want connections for the backchannel, we set | |
3103 | * the xprt status to connected | |
3104 | */ | |
3105 | xprt_set_connected(xprt); | |
3106 | ||
f300baba AB |
3107 | if (try_module_get(THIS_MODULE)) |
3108 | return xprt; | |
642aab58 KM |
3109 | |
3110 | args->bc_xprt->xpt_bc_xprt = NULL; | |
39a9beab | 3111 | args->bc_xprt->xpt_bc_xps = NULL; |
99de8ea9 | 3112 | xprt_put(xprt); |
0a68b0be BF |
3113 | ret = ERR_PTR(-EINVAL); |
3114 | out_err: | |
315f3812 | 3115 | xs_xprt_free(xprt); |
0a68b0be | 3116 | return ret; |
f300baba AB |
3117 | } |
3118 | ||
176e21ee CL |
3119 | static struct xprt_class xs_local_transport = { |
3120 | .list = LIST_HEAD_INIT(xs_local_transport.list), | |
3121 | .name = "named UNIX socket", | |
3122 | .owner = THIS_MODULE, | |
3123 | .ident = XPRT_TRANSPORT_LOCAL, | |
3124 | .setup = xs_setup_local, | |
3125 | }; | |
3126 | ||
bc25571e TT |
3127 | static struct xprt_class xs_udp_transport = { |
3128 | .list = LIST_HEAD_INIT(xs_udp_transport.list), | |
3129 | .name = "udp", | |
3130 | .owner = THIS_MODULE, | |
f300baba | 3131 | .ident = XPRT_TRANSPORT_UDP, |
bc25571e TT |
3132 | .setup = xs_setup_udp, |
3133 | }; | |
3134 | ||
3135 | static struct xprt_class xs_tcp_transport = { | |
3136 | .list = LIST_HEAD_INIT(xs_tcp_transport.list), | |
3137 | .name = "tcp", | |
3138 | .owner = THIS_MODULE, | |
f300baba | 3139 | .ident = XPRT_TRANSPORT_TCP, |
bc25571e TT |
3140 | .setup = xs_setup_tcp, |
3141 | }; | |
3142 | ||
f300baba AB |
3143 | static struct xprt_class xs_bc_tcp_transport = { |
3144 | .list = LIST_HEAD_INIT(xs_bc_tcp_transport.list), | |
3145 | .name = "tcp NFSv4.1 backchannel", | |
3146 | .owner = THIS_MODULE, | |
3147 | .ident = XPRT_TRANSPORT_BC_TCP, | |
3148 | .setup = xs_setup_bc_tcp, | |
3149 | }; | |
3150 | ||
282b32e1 | 3151 | /** |
bc25571e | 3152 | * init_socket_xprt - set up xprtsock's sysctls, register with RPC client |
282b32e1 CL |
3153 | * |
3154 | */ | |
3155 | int init_socket_xprt(void) | |
3156 | { | |
f895b252 | 3157 | #if IS_ENABLED(CONFIG_SUNRPC_DEBUG) |
2b1bec5f | 3158 | if (!sunrpc_table_header) |
0b4d4147 | 3159 | sunrpc_table_header = register_sysctl_table(sunrpc_table); |
fbf76683 CL |
3160 | #endif |
3161 | ||
176e21ee | 3162 | xprt_register_transport(&xs_local_transport); |
bc25571e TT |
3163 | xprt_register_transport(&xs_udp_transport); |
3164 | xprt_register_transport(&xs_tcp_transport); | |
f300baba | 3165 | xprt_register_transport(&xs_bc_tcp_transport); |
bc25571e | 3166 | |
282b32e1 CL |
3167 | return 0; |
3168 | } | |
3169 | ||
3170 | /** | |
bc25571e | 3171 | * cleanup_socket_xprt - remove xprtsock's sysctls, unregister |
282b32e1 CL |
3172 | * |
3173 | */ | |
3174 | void cleanup_socket_xprt(void) | |
3175 | { | |
f895b252 | 3176 | #if IS_ENABLED(CONFIG_SUNRPC_DEBUG) |
fbf76683 CL |
3177 | if (sunrpc_table_header) { |
3178 | unregister_sysctl_table(sunrpc_table_header); | |
3179 | sunrpc_table_header = NULL; | |
3180 | } | |
3181 | #endif | |
bc25571e | 3182 | |
176e21ee | 3183 | xprt_unregister_transport(&xs_local_transport); |
bc25571e TT |
3184 | xprt_unregister_transport(&xs_udp_transport); |
3185 | xprt_unregister_transport(&xs_tcp_transport); | |
f300baba | 3186 | xprt_unregister_transport(&xs_bc_tcp_transport); |
282b32e1 | 3187 | } |
cbf11071 | 3188 | |
9bbb9e5a RR |
3189 | static int param_set_uint_minmax(const char *val, |
3190 | const struct kernel_param *kp, | |
cbf11071 TM |
3191 | unsigned int min, unsigned int max) |
3192 | { | |
00cfaa94 | 3193 | unsigned int num; |
cbf11071 TM |
3194 | int ret; |
3195 | ||
3196 | if (!val) | |
3197 | return -EINVAL; | |
00cfaa94 | 3198 | ret = kstrtouint(val, 0, &num); |
cbf11071 TM |
3199 | if (ret == -EINVAL || num < min || num > max) |
3200 | return -EINVAL; | |
3201 | *((unsigned int *)kp->arg) = num; | |
3202 | return 0; | |
3203 | } | |
3204 | ||
9bbb9e5a | 3205 | static int param_set_portnr(const char *val, const struct kernel_param *kp) |
cbf11071 | 3206 | { |
ffb6ca33 FS |
3207 | if (kp->arg == &xprt_min_resvport) |
3208 | return param_set_uint_minmax(val, kp, | |
cbf11071 | 3209 | RPC_MIN_RESVPORT, |
ffb6ca33 FS |
3210 | xprt_max_resvport); |
3211 | return param_set_uint_minmax(val, kp, | |
3212 | xprt_min_resvport, | |
cbf11071 TM |
3213 | RPC_MAX_RESVPORT); |
3214 | } | |
3215 | ||
9c27847d | 3216 | static const struct kernel_param_ops param_ops_portnr = { |
9bbb9e5a RR |
3217 | .set = param_set_portnr, |
3218 | .get = param_get_uint, | |
3219 | }; | |
3220 | ||
cbf11071 TM |
3221 | #define param_check_portnr(name, p) \ |
3222 | __param_check(name, p, unsigned int); | |
3223 | ||
3224 | module_param_named(min_resvport, xprt_min_resvport, portnr, 0644); | |
3225 | module_param_named(max_resvport, xprt_max_resvport, portnr, 0644); | |
3226 | ||
9bbb9e5a RR |
3227 | static int param_set_slot_table_size(const char *val, |
3228 | const struct kernel_param *kp) | |
cbf11071 TM |
3229 | { |
3230 | return param_set_uint_minmax(val, kp, | |
3231 | RPC_MIN_SLOT_TABLE, | |
3232 | RPC_MAX_SLOT_TABLE); | |
3233 | } | |
3234 | ||
9c27847d | 3235 | static const struct kernel_param_ops param_ops_slot_table_size = { |
9bbb9e5a RR |
3236 | .set = param_set_slot_table_size, |
3237 | .get = param_get_uint, | |
3238 | }; | |
3239 | ||
cbf11071 TM |
3240 | #define param_check_slot_table_size(name, p) \ |
3241 | __param_check(name, p, unsigned int); | |
3242 | ||
d9ba131d TM |
3243 | static int param_set_max_slot_table_size(const char *val, |
3244 | const struct kernel_param *kp) | |
3245 | { | |
3246 | return param_set_uint_minmax(val, kp, | |
3247 | RPC_MIN_SLOT_TABLE, | |
3248 | RPC_MAX_SLOT_TABLE_LIMIT); | |
3249 | } | |
3250 | ||
9c27847d | 3251 | static const struct kernel_param_ops param_ops_max_slot_table_size = { |
d9ba131d TM |
3252 | .set = param_set_max_slot_table_size, |
3253 | .get = param_get_uint, | |
3254 | }; | |
3255 | ||
3256 | #define param_check_max_slot_table_size(name, p) \ | |
3257 | __param_check(name, p, unsigned int); | |
3258 | ||
cbf11071 TM |
3259 | module_param_named(tcp_slot_table_entries, xprt_tcp_slot_table_entries, |
3260 | slot_table_size, 0644); | |
d9ba131d TM |
3261 | module_param_named(tcp_max_slot_table_entries, xprt_max_tcp_slot_table_entries, |
3262 | max_slot_table_size, 0644); | |
cbf11071 TM |
3263 | module_param_named(udp_slot_table_entries, xprt_udp_slot_table_entries, |
3264 | slot_table_size, 0644); | |
3265 |