2 * linux/net/sunrpc/xprtsock.c
4 * Client-side transport implementation for sockets.
6 * TCP callback races fixes (C) 1998 Red Hat
7 * TCP send fixes (C) 1998 Red Hat
8 * TCP NFS related read + write fixes
9 * (C) 1999 Dave Airlie, University of Limerick, Ireland <airlied@linux.ie>
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>
15 * IP socket transport implementation, (C) 2005 Chuck Lever <cel@netapp.com>
17 * IPv6 support contributed by Gilles Quillard, Bull Open Source, 2005.
18 * <gilles.quillard@bull.net>
21 #include <linux/types.h>
22 #include <linux/string.h>
23 #include <linux/slab.h>
24 #include <linux/module.h>
25 #include <linux/capability.h>
26 #include <linux/pagemap.h>
27 #include <linux/errno.h>
28 #include <linux/socket.h>
30 #include <linux/net.h>
33 #include <linux/udp.h>
34 #include <linux/tcp.h>
35 #include <linux/sunrpc/clnt.h>
36 #include <linux/sunrpc/addr.h>
37 #include <linux/sunrpc/sched.h>
38 #include <linux/sunrpc/svcsock.h>
39 #include <linux/sunrpc/xprtsock.h>
40 #include <linux/file.h>
41 #ifdef CONFIG_SUNRPC_BACKCHANNEL
42 #include <linux/sunrpc/bc_xprt.h>
46 #include <net/checksum.h>
52 static void xs_close(struct rpc_xprt
*xprt
);
57 static unsigned int xprt_udp_slot_table_entries
= RPC_DEF_SLOT_TABLE
;
58 static unsigned int xprt_tcp_slot_table_entries
= RPC_MIN_SLOT_TABLE
;
59 static unsigned int xprt_max_tcp_slot_table_entries
= RPC_MAX_SLOT_TABLE
;
61 static unsigned int xprt_min_resvport
= RPC_DEF_MIN_RESVPORT
;
62 static unsigned int xprt_max_resvport
= RPC_DEF_MAX_RESVPORT
;
64 #define XS_TCP_LINGER_TO (15U * HZ)
65 static unsigned int xs_tcp_fin_timeout __read_mostly
= XS_TCP_LINGER_TO
;
68 * We can register our own files under /proc/sys/sunrpc by
69 * calling register_sysctl_table() again. The files in that
70 * directory become the union of all files registered there.
72 * We simply need to make sure that we don't collide with
73 * someone else's file names!
78 static unsigned int min_slot_table_size
= RPC_MIN_SLOT_TABLE
;
79 static unsigned int max_slot_table_size
= RPC_MAX_SLOT_TABLE
;
80 static unsigned int max_tcp_slot_table_limit
= RPC_MAX_SLOT_TABLE_LIMIT
;
81 static unsigned int xprt_min_resvport_limit
= RPC_MIN_RESVPORT
;
82 static unsigned int xprt_max_resvport_limit
= RPC_MAX_RESVPORT
;
84 static struct ctl_table_header
*sunrpc_table_header
;
87 * FIXME: changing the UDP slot table size should also resize the UDP
88 * socket buffers for existing UDP transports
90 static struct ctl_table xs_tunables_table
[] = {
92 .procname
= "udp_slot_table_entries",
93 .data
= &xprt_udp_slot_table_entries
,
94 .maxlen
= sizeof(unsigned int),
96 .proc_handler
= proc_dointvec_minmax
,
97 .extra1
= &min_slot_table_size
,
98 .extra2
= &max_slot_table_size
101 .procname
= "tcp_slot_table_entries",
102 .data
= &xprt_tcp_slot_table_entries
,
103 .maxlen
= sizeof(unsigned int),
105 .proc_handler
= proc_dointvec_minmax
,
106 .extra1
= &min_slot_table_size
,
107 .extra2
= &max_slot_table_size
110 .procname
= "tcp_max_slot_table_entries",
111 .data
= &xprt_max_tcp_slot_table_entries
,
112 .maxlen
= sizeof(unsigned int),
114 .proc_handler
= proc_dointvec_minmax
,
115 .extra1
= &min_slot_table_size
,
116 .extra2
= &max_tcp_slot_table_limit
119 .procname
= "min_resvport",
120 .data
= &xprt_min_resvport
,
121 .maxlen
= sizeof(unsigned int),
123 .proc_handler
= proc_dointvec_minmax
,
124 .extra1
= &xprt_min_resvport_limit
,
125 .extra2
= &xprt_max_resvport_limit
128 .procname
= "max_resvport",
129 .data
= &xprt_max_resvport
,
130 .maxlen
= sizeof(unsigned int),
132 .proc_handler
= proc_dointvec_minmax
,
133 .extra1
= &xprt_min_resvport_limit
,
134 .extra2
= &xprt_max_resvport_limit
137 .procname
= "tcp_fin_timeout",
138 .data
= &xs_tcp_fin_timeout
,
139 .maxlen
= sizeof(xs_tcp_fin_timeout
),
141 .proc_handler
= proc_dointvec_jiffies
,
146 static struct ctl_table sunrpc_table
[] = {
148 .procname
= "sunrpc",
150 .child
= xs_tunables_table
158 * Wait duration for a reply from the RPC portmapper.
160 #define XS_BIND_TO (60U * HZ)
163 * Delay if a UDP socket connect error occurs. This is most likely some
164 * kind of resource problem on the local host.
166 #define XS_UDP_REEST_TO (2U * HZ)
169 * The reestablish timeout allows clients to delay for a bit before attempting
170 * to reconnect to a server that just dropped our connection.
172 * We implement an exponential backoff when trying to reestablish a TCP
173 * transport connection with the server. Some servers like to drop a TCP
174 * connection when they are overworked, so we start with a short timeout and
175 * increase over time if the server is down or not responding.
177 #define XS_TCP_INIT_REEST_TO (3U * HZ)
178 #define XS_TCP_MAX_REEST_TO (5U * 60 * HZ)
181 * TCP idle timeout; client drops the transport socket if it is idle
182 * for this long. Note that we also timeout UDP sockets to prevent
183 * holding port numbers when there is no RPC traffic.
185 #define XS_IDLE_DISC_TO (5U * 60 * HZ)
188 # undef RPC_DEBUG_DATA
189 # define RPCDBG_FACILITY RPCDBG_TRANS
192 #ifdef RPC_DEBUG_DATA
193 static void xs_pktdump(char *msg
, u32
*packet
, unsigned int count
)
195 u8
*buf
= (u8
*) packet
;
198 dprintk("RPC: %s\n", msg
);
199 for (j
= 0; j
< count
&& j
< 128; j
+= 4) {
203 dprintk("0x%04x ", j
);
205 dprintk("%02x%02x%02x%02x ",
206 buf
[j
], buf
[j
+1], buf
[j
+2], buf
[j
+3]);
211 static inline void xs_pktdump(char *msg
, u32
*packet
, unsigned int count
)
218 struct rpc_xprt xprt
;
223 struct socket
* sock
;
227 * State of TCP reply receive
236 unsigned long tcp_copied
,
240 * Connection of transports
242 struct delayed_work connect_worker
;
243 struct sockaddr_storage srcaddr
;
244 unsigned short srcport
;
247 * UDP socket buffer size parameters
253 * Saved socket callback addresses
255 void (*old_data_ready
)(struct sock
*, int);
256 void (*old_state_change
)(struct sock
*);
257 void (*old_write_space
)(struct sock
*);
261 * TCP receive state flags
263 #define TCP_RCV_LAST_FRAG (1UL << 0)
264 #define TCP_RCV_COPY_FRAGHDR (1UL << 1)
265 #define TCP_RCV_COPY_XID (1UL << 2)
266 #define TCP_RCV_COPY_DATA (1UL << 3)
267 #define TCP_RCV_READ_CALLDIR (1UL << 4)
268 #define TCP_RCV_COPY_CALLDIR (1UL << 5)
273 #define TCP_RPC_REPLY (1UL << 6)
275 static inline struct sockaddr
*xs_addr(struct rpc_xprt
*xprt
)
277 return (struct sockaddr
*) &xprt
->addr
;
280 static inline struct sockaddr_un
*xs_addr_un(struct rpc_xprt
*xprt
)
282 return (struct sockaddr_un
*) &xprt
->addr
;
285 static inline struct sockaddr_in
*xs_addr_in(struct rpc_xprt
*xprt
)
287 return (struct sockaddr_in
*) &xprt
->addr
;
290 static inline struct sockaddr_in6
*xs_addr_in6(struct rpc_xprt
*xprt
)
292 return (struct sockaddr_in6
*) &xprt
->addr
;
295 static void xs_format_common_peer_addresses(struct rpc_xprt
*xprt
)
297 struct sockaddr
*sap
= xs_addr(xprt
);
298 struct sockaddr_in6
*sin6
;
299 struct sockaddr_in
*sin
;
300 struct sockaddr_un
*sun
;
303 switch (sap
->sa_family
) {
305 sun
= xs_addr_un(xprt
);
306 strlcpy(buf
, sun
->sun_path
, sizeof(buf
));
307 xprt
->address_strings
[RPC_DISPLAY_ADDR
] =
308 kstrdup(buf
, GFP_KERNEL
);
311 (void)rpc_ntop(sap
, buf
, sizeof(buf
));
312 xprt
->address_strings
[RPC_DISPLAY_ADDR
] =
313 kstrdup(buf
, GFP_KERNEL
);
314 sin
= xs_addr_in(xprt
);
315 snprintf(buf
, sizeof(buf
), "%08x", ntohl(sin
->sin_addr
.s_addr
));
318 (void)rpc_ntop(sap
, buf
, sizeof(buf
));
319 xprt
->address_strings
[RPC_DISPLAY_ADDR
] =
320 kstrdup(buf
, GFP_KERNEL
);
321 sin6
= xs_addr_in6(xprt
);
322 snprintf(buf
, sizeof(buf
), "%pi6", &sin6
->sin6_addr
);
328 xprt
->address_strings
[RPC_DISPLAY_HEX_ADDR
] = kstrdup(buf
, GFP_KERNEL
);
331 static void xs_format_common_peer_ports(struct rpc_xprt
*xprt
)
333 struct sockaddr
*sap
= xs_addr(xprt
);
336 snprintf(buf
, sizeof(buf
), "%u", rpc_get_port(sap
));
337 xprt
->address_strings
[RPC_DISPLAY_PORT
] = kstrdup(buf
, GFP_KERNEL
);
339 snprintf(buf
, sizeof(buf
), "%4hx", rpc_get_port(sap
));
340 xprt
->address_strings
[RPC_DISPLAY_HEX_PORT
] = kstrdup(buf
, GFP_KERNEL
);
343 static void xs_format_peer_addresses(struct rpc_xprt
*xprt
,
344 const char *protocol
,
347 xprt
->address_strings
[RPC_DISPLAY_PROTO
] = protocol
;
348 xprt
->address_strings
[RPC_DISPLAY_NETID
] = netid
;
349 xs_format_common_peer_addresses(xprt
);
350 xs_format_common_peer_ports(xprt
);
353 static void xs_update_peer_port(struct rpc_xprt
*xprt
)
355 kfree(xprt
->address_strings
[RPC_DISPLAY_HEX_PORT
]);
356 kfree(xprt
->address_strings
[RPC_DISPLAY_PORT
]);
358 xs_format_common_peer_ports(xprt
);
361 static void xs_free_peer_addresses(struct rpc_xprt
*xprt
)
365 for (i
= 0; i
< RPC_DISPLAY_MAX
; i
++)
367 case RPC_DISPLAY_PROTO
:
368 case RPC_DISPLAY_NETID
:
371 kfree(xprt
->address_strings
[i
]);
375 #define XS_SENDMSG_FLAGS (MSG_DONTWAIT | MSG_NOSIGNAL)
377 static int xs_send_kvec(struct socket
*sock
, struct sockaddr
*addr
, int addrlen
, struct kvec
*vec
, unsigned int base
, int more
)
379 struct msghdr msg
= {
381 .msg_namelen
= addrlen
,
382 .msg_flags
= XS_SENDMSG_FLAGS
| (more
? MSG_MORE
: 0),
385 .iov_base
= vec
->iov_base
+ base
,
386 .iov_len
= vec
->iov_len
- base
,
389 if (iov
.iov_len
!= 0)
390 return kernel_sendmsg(sock
, &msg
, &iov
, 1, iov
.iov_len
);
391 return kernel_sendmsg(sock
, &msg
, NULL
, 0, 0);
394 static int xs_send_pagedata(struct socket
*sock
, struct xdr_buf
*xdr
, unsigned int base
, int more
)
397 unsigned int remainder
;
400 remainder
= xdr
->page_len
- base
;
401 base
+= xdr
->page_base
;
402 ppage
= xdr
->pages
+ (base
>> PAGE_SHIFT
);
405 unsigned int len
= min_t(unsigned int, PAGE_SIZE
- base
, remainder
);
406 int flags
= XS_SENDMSG_FLAGS
;
409 if (remainder
!= 0 || more
)
411 err
= sock
->ops
->sendpage(sock
, *ppage
, base
, len
, flags
);
412 if (remainder
== 0 || err
!= len
)
426 * xs_sendpages - write pages directly to a socket
427 * @sock: socket to send on
428 * @addr: UDP only -- address of destination
429 * @addrlen: UDP only -- length of destination address
430 * @xdr: buffer containing this request
431 * @base: starting position in the buffer
434 static int xs_sendpages(struct socket
*sock
, struct sockaddr
*addr
, int addrlen
, struct xdr_buf
*xdr
, unsigned int base
)
436 unsigned int remainder
= xdr
->len
- base
;
442 clear_bit(SOCK_ASYNC_NOSPACE
, &sock
->flags
);
448 if (base
< xdr
->head
[0].iov_len
|| addr
!= NULL
) {
449 unsigned int len
= xdr
->head
[0].iov_len
- base
;
451 err
= xs_send_kvec(sock
, addr
, addrlen
, &xdr
->head
[0], base
, remainder
!= 0);
452 if (remainder
== 0 || err
!= len
)
457 base
-= xdr
->head
[0].iov_len
;
459 if (base
< xdr
->page_len
) {
460 unsigned int len
= xdr
->page_len
- base
;
462 err
= xs_send_pagedata(sock
, xdr
, base
, remainder
!= 0);
463 if (remainder
== 0 || err
!= len
)
468 base
-= xdr
->page_len
;
470 if (base
>= xdr
->tail
[0].iov_len
)
472 err
= xs_send_kvec(sock
, NULL
, 0, &xdr
->tail
[0], base
, 0);
481 static void xs_nospace_callback(struct rpc_task
*task
)
483 struct sock_xprt
*transport
= container_of(task
->tk_rqstp
->rq_xprt
, struct sock_xprt
, xprt
);
485 transport
->inet
->sk_write_pending
--;
486 clear_bit(SOCK_ASYNC_NOSPACE
, &transport
->sock
->flags
);
490 * xs_nospace - place task on wait queue if transmit was incomplete
491 * @task: task to put to sleep
494 static int xs_nospace(struct rpc_task
*task
)
496 struct rpc_rqst
*req
= task
->tk_rqstp
;
497 struct rpc_xprt
*xprt
= req
->rq_xprt
;
498 struct sock_xprt
*transport
= container_of(xprt
, struct sock_xprt
, xprt
);
501 dprintk("RPC: %5u xmit incomplete (%u left of %u)\n",
502 task
->tk_pid
, req
->rq_slen
- req
->rq_bytes_sent
,
505 /* Protect against races with write_space */
506 spin_lock_bh(&xprt
->transport_lock
);
508 /* Don't race with disconnect */
509 if (xprt_connected(xprt
)) {
510 if (test_bit(SOCK_ASYNC_NOSPACE
, &transport
->sock
->flags
)) {
512 * Notify TCP that we're limited by the application
515 set_bit(SOCK_NOSPACE
, &transport
->sock
->flags
);
516 transport
->inet
->sk_write_pending
++;
517 /* ...and wait for more buffer space */
518 xprt_wait_for_buffer_space(task
, xs_nospace_callback
);
521 clear_bit(SOCK_ASYNC_NOSPACE
, &transport
->sock
->flags
);
525 spin_unlock_bh(&xprt
->transport_lock
);
530 * Construct a stream transport record marker in @buf.
532 static inline void xs_encode_stream_record_marker(struct xdr_buf
*buf
)
534 u32 reclen
= buf
->len
- sizeof(rpc_fraghdr
);
535 rpc_fraghdr
*base
= buf
->head
[0].iov_base
;
536 *base
= cpu_to_be32(RPC_LAST_STREAM_FRAGMENT
| reclen
);
540 * xs_local_send_request - write an RPC request to an AF_LOCAL socket
541 * @task: RPC task that manages the state of an RPC request
544 * 0: The request has been sent
545 * EAGAIN: The socket was blocked, please call again later to
546 * complete the request
547 * ENOTCONN: Caller needs to invoke connect logic then call again
548 * other: Some other error occured, the request was not sent
550 static int xs_local_send_request(struct rpc_task
*task
)
552 struct rpc_rqst
*req
= task
->tk_rqstp
;
553 struct rpc_xprt
*xprt
= req
->rq_xprt
;
554 struct sock_xprt
*transport
=
555 container_of(xprt
, struct sock_xprt
, xprt
);
556 struct xdr_buf
*xdr
= &req
->rq_snd_buf
;
559 xs_encode_stream_record_marker(&req
->rq_snd_buf
);
561 xs_pktdump("packet data:",
562 req
->rq_svec
->iov_base
, req
->rq_svec
->iov_len
);
564 status
= xs_sendpages(transport
->sock
, NULL
, 0,
565 xdr
, req
->rq_bytes_sent
);
566 dprintk("RPC: %s(%u) = %d\n",
567 __func__
, xdr
->len
- req
->rq_bytes_sent
, status
);
568 if (likely(status
>= 0)) {
569 req
->rq_bytes_sent
+= status
;
570 req
->rq_xmit_bytes_sent
+= status
;
571 if (likely(req
->rq_bytes_sent
>= req
->rq_slen
)) {
572 req
->rq_bytes_sent
= 0;
580 status
= xs_nospace(task
);
583 dprintk("RPC: sendmsg returned unrecognized error %d\n",
594 * xs_udp_send_request - write an RPC request to a UDP socket
595 * @task: address of RPC task that manages the state of an RPC request
598 * 0: The request has been sent
599 * EAGAIN: The socket was blocked, please call again later to
600 * complete the request
601 * ENOTCONN: Caller needs to invoke connect logic then call again
602 * other: Some other error occurred, the request was not sent
604 static int xs_udp_send_request(struct rpc_task
*task
)
606 struct rpc_rqst
*req
= task
->tk_rqstp
;
607 struct rpc_xprt
*xprt
= req
->rq_xprt
;
608 struct sock_xprt
*transport
= container_of(xprt
, struct sock_xprt
, xprt
);
609 struct xdr_buf
*xdr
= &req
->rq_snd_buf
;
612 xs_pktdump("packet data:",
613 req
->rq_svec
->iov_base
,
614 req
->rq_svec
->iov_len
);
616 if (!xprt_bound(xprt
))
618 status
= xs_sendpages(transport
->sock
,
623 dprintk("RPC: xs_udp_send_request(%u) = %d\n",
624 xdr
->len
- req
->rq_bytes_sent
, status
);
627 req
->rq_xmit_bytes_sent
+= status
;
628 if (status
>= req
->rq_slen
)
630 /* Still some bytes left; set up for a retry later. */
637 /* Should we call xs_close() here? */
640 status
= xs_nospace(task
);
643 dprintk("RPC: sendmsg returned unrecognized error %d\n",
648 /* When the server has died, an ICMP port unreachable message
649 * prompts ECONNREFUSED. */
650 clear_bit(SOCK_ASYNC_NOSPACE
, &transport
->sock
->flags
);
657 * xs_tcp_shutdown - gracefully shut down a TCP socket
660 * Initiates a graceful shutdown of the TCP socket by calling the
661 * equivalent of shutdown(SHUT_WR);
663 static void xs_tcp_shutdown(struct rpc_xprt
*xprt
)
665 struct sock_xprt
*transport
= container_of(xprt
, struct sock_xprt
, xprt
);
666 struct socket
*sock
= transport
->sock
;
669 kernel_sock_shutdown(sock
, SHUT_WR
);
673 * xs_tcp_send_request - write an RPC request to a TCP socket
674 * @task: address of RPC task that manages the state of an RPC request
677 * 0: The request has been sent
678 * EAGAIN: The socket was blocked, please call again later to
679 * complete the request
680 * ENOTCONN: Caller needs to invoke connect logic then call again
681 * other: Some other error occurred, the request was not sent
683 * XXX: In the case of soft timeouts, should we eventually give up
684 * if sendmsg is not able to make progress?
686 static int xs_tcp_send_request(struct rpc_task
*task
)
688 struct rpc_rqst
*req
= task
->tk_rqstp
;
689 struct rpc_xprt
*xprt
= req
->rq_xprt
;
690 struct sock_xprt
*transport
= container_of(xprt
, struct sock_xprt
, xprt
);
691 struct xdr_buf
*xdr
= &req
->rq_snd_buf
;
694 xs_encode_stream_record_marker(&req
->rq_snd_buf
);
696 xs_pktdump("packet data:",
697 req
->rq_svec
->iov_base
,
698 req
->rq_svec
->iov_len
);
700 /* Continue transmitting the packet/record. We must be careful
701 * to cope with writespace callbacks arriving _after_ we have
702 * called sendmsg(). */
704 status
= xs_sendpages(transport
->sock
,
705 NULL
, 0, xdr
, req
->rq_bytes_sent
);
707 dprintk("RPC: xs_tcp_send_request(%u) = %d\n",
708 xdr
->len
- req
->rq_bytes_sent
, status
);
710 if (unlikely(status
< 0))
713 /* If we've sent the entire packet, immediately
714 * reset the count of bytes sent. */
715 req
->rq_bytes_sent
+= status
;
716 req
->rq_xmit_bytes_sent
+= status
;
717 if (likely(req
->rq_bytes_sent
>= req
->rq_slen
)) {
718 req
->rq_bytes_sent
= 0;
731 /* Should we call xs_close() here? */
734 status
= xs_nospace(task
);
737 dprintk("RPC: sendmsg returned unrecognized error %d\n",
740 xs_tcp_shutdown(xprt
);
744 clear_bit(SOCK_ASYNC_NOSPACE
, &transport
->sock
->flags
);
751 * xs_tcp_release_xprt - clean up after a tcp transmission
755 * This cleans up if an error causes us to abort the transmission of a request.
756 * In this case, the socket may need to be reset in order to avoid confusing
759 static void xs_tcp_release_xprt(struct rpc_xprt
*xprt
, struct rpc_task
*task
)
761 struct rpc_rqst
*req
;
763 if (task
!= xprt
->snd_task
)
767 req
= task
->tk_rqstp
;
770 if (req
->rq_bytes_sent
== 0)
772 if (req
->rq_bytes_sent
== req
->rq_snd_buf
.len
)
774 set_bit(XPRT_CLOSE_WAIT
, &xprt
->state
);
776 xprt_release_xprt(xprt
, task
);
779 static void xs_save_old_callbacks(struct sock_xprt
*transport
, struct sock
*sk
)
781 transport
->old_data_ready
= sk
->sk_data_ready
;
782 transport
->old_state_change
= sk
->sk_state_change
;
783 transport
->old_write_space
= sk
->sk_write_space
;
786 static void xs_restore_old_callbacks(struct sock_xprt
*transport
, struct sock
*sk
)
788 sk
->sk_data_ready
= transport
->old_data_ready
;
789 sk
->sk_state_change
= transport
->old_state_change
;
790 sk
->sk_write_space
= transport
->old_write_space
;
793 static void xs_reset_transport(struct sock_xprt
*transport
)
795 struct socket
*sock
= transport
->sock
;
796 struct sock
*sk
= transport
->inet
;
801 transport
->srcport
= 0;
803 write_lock_bh(&sk
->sk_callback_lock
);
804 transport
->inet
= NULL
;
805 transport
->sock
= NULL
;
807 sk
->sk_user_data
= NULL
;
809 xs_restore_old_callbacks(transport
, sk
);
810 write_unlock_bh(&sk
->sk_callback_lock
);
818 * xs_close - close a socket
821 * This is used when all requests are complete; ie, no DRC state remains
822 * on the server we want to save.
824 * The caller _must_ be holding XPRT_LOCKED in order to avoid issues with
825 * xs_reset_transport() zeroing the socket from underneath a writer.
827 static void xs_close(struct rpc_xprt
*xprt
)
829 struct sock_xprt
*transport
= container_of(xprt
, struct sock_xprt
, xprt
);
831 dprintk("RPC: xs_close xprt %p\n", xprt
);
833 xs_reset_transport(transport
);
834 xprt
->reestablish_timeout
= 0;
836 smp_mb__before_clear_bit();
837 clear_bit(XPRT_CONNECTION_ABORT
, &xprt
->state
);
838 clear_bit(XPRT_CLOSE_WAIT
, &xprt
->state
);
839 clear_bit(XPRT_CLOSING
, &xprt
->state
);
840 smp_mb__after_clear_bit();
841 xprt_disconnect_done(xprt
);
844 static void xs_tcp_close(struct rpc_xprt
*xprt
)
846 if (test_and_clear_bit(XPRT_CONNECTION_CLOSE
, &xprt
->state
))
849 xs_tcp_shutdown(xprt
);
852 static void xs_local_destroy(struct rpc_xprt
*xprt
)
855 xs_free_peer_addresses(xprt
);
857 module_put(THIS_MODULE
);
861 * xs_destroy - prepare to shutdown a transport
862 * @xprt: doomed transport
865 static void xs_destroy(struct rpc_xprt
*xprt
)
867 struct sock_xprt
*transport
= container_of(xprt
, struct sock_xprt
, xprt
);
869 dprintk("RPC: xs_destroy xprt %p\n", xprt
);
871 cancel_delayed_work_sync(&transport
->connect_worker
);
873 xs_local_destroy(xprt
);
876 static inline struct rpc_xprt
*xprt_from_sock(struct sock
*sk
)
878 return (struct rpc_xprt
*) sk
->sk_user_data
;
881 static int xs_local_copy_to_xdr(struct xdr_buf
*xdr
, struct sk_buff
*skb
)
883 struct xdr_skb_reader desc
= {
885 .offset
= sizeof(rpc_fraghdr
),
886 .count
= skb
->len
- sizeof(rpc_fraghdr
),
889 if (xdr_partial_copy_from_skb(xdr
, 0, &desc
, xdr_skb_read_bits
) < 0)
897 * xs_local_data_ready - "data ready" callback for AF_LOCAL sockets
898 * @sk: socket with data to read
899 * @len: how much data to read
901 * Currently this assumes we can read the whole reply in a single gulp.
903 static void xs_local_data_ready(struct sock
*sk
, int len
)
905 struct rpc_task
*task
;
906 struct rpc_xprt
*xprt
;
907 struct rpc_rqst
*rovr
;
909 int err
, repsize
, copied
;
913 read_lock_bh(&sk
->sk_callback_lock
);
914 dprintk("RPC: %s...\n", __func__
);
915 xprt
= xprt_from_sock(sk
);
919 skb
= skb_recv_datagram(sk
, 0, 1, &err
);
923 repsize
= skb
->len
- sizeof(rpc_fraghdr
);
925 dprintk("RPC: impossible RPC reply size %d\n", repsize
);
929 /* Copy the XID from the skb... */
930 xp
= skb_header_pointer(skb
, sizeof(rpc_fraghdr
), sizeof(_xid
), &_xid
);
934 /* Look up and lock the request corresponding to the given XID */
935 spin_lock(&xprt
->transport_lock
);
936 rovr
= xprt_lookup_rqst(xprt
, *xp
);
939 task
= rovr
->rq_task
;
941 copied
= rovr
->rq_private_buf
.buflen
;
942 if (copied
> repsize
)
945 if (xs_local_copy_to_xdr(&rovr
->rq_private_buf
, skb
)) {
946 dprintk("RPC: sk_buff copy failed\n");
950 xprt_complete_rqst(task
, copied
);
953 spin_unlock(&xprt
->transport_lock
);
955 skb_free_datagram(sk
, skb
);
957 read_unlock_bh(&sk
->sk_callback_lock
);
961 * xs_udp_data_ready - "data ready" callback for UDP sockets
962 * @sk: socket with data to read
963 * @len: how much data to read
966 static void xs_udp_data_ready(struct sock
*sk
, int len
)
968 struct rpc_task
*task
;
969 struct rpc_xprt
*xprt
;
970 struct rpc_rqst
*rovr
;
972 int err
, repsize
, copied
;
976 read_lock_bh(&sk
->sk_callback_lock
);
977 dprintk("RPC: xs_udp_data_ready...\n");
978 if (!(xprt
= xprt_from_sock(sk
)))
981 if ((skb
= skb_recv_datagram(sk
, 0, 1, &err
)) == NULL
)
984 repsize
= skb
->len
- sizeof(struct udphdr
);
986 dprintk("RPC: impossible RPC reply size %d!\n", repsize
);
990 /* Copy the XID from the skb... */
991 xp
= skb_header_pointer(skb
, sizeof(struct udphdr
),
992 sizeof(_xid
), &_xid
);
996 /* Look up and lock the request corresponding to the given XID */
997 spin_lock(&xprt
->transport_lock
);
998 rovr
= xprt_lookup_rqst(xprt
, *xp
);
1001 task
= rovr
->rq_task
;
1003 if ((copied
= rovr
->rq_private_buf
.buflen
) > repsize
)
1006 /* Suck it into the iovec, verify checksum if not done by hw. */
1007 if (csum_partial_copy_to_xdr(&rovr
->rq_private_buf
, skb
)) {
1008 UDPX_INC_STATS_BH(sk
, UDP_MIB_INERRORS
);
1012 UDPX_INC_STATS_BH(sk
, UDP_MIB_INDATAGRAMS
);
1014 xprt_adjust_cwnd(xprt
, task
, copied
);
1015 xprt_complete_rqst(task
, copied
);
1018 spin_unlock(&xprt
->transport_lock
);
1020 skb_free_datagram(sk
, skb
);
1022 read_unlock_bh(&sk
->sk_callback_lock
);
1026 * Helper function to force a TCP close if the server is sending
1027 * junk and/or it has put us in CLOSE_WAIT
1029 static void xs_tcp_force_close(struct rpc_xprt
*xprt
)
1031 set_bit(XPRT_CONNECTION_CLOSE
, &xprt
->state
);
1032 xprt_force_disconnect(xprt
);
1035 static inline void xs_tcp_read_fraghdr(struct rpc_xprt
*xprt
, struct xdr_skb_reader
*desc
)
1037 struct sock_xprt
*transport
= container_of(xprt
, struct sock_xprt
, xprt
);
1041 p
= ((char *) &transport
->tcp_fraghdr
) + transport
->tcp_offset
;
1042 len
= sizeof(transport
->tcp_fraghdr
) - transport
->tcp_offset
;
1043 used
= xdr_skb_read_bits(desc
, p
, len
);
1044 transport
->tcp_offset
+= used
;
1048 transport
->tcp_reclen
= ntohl(transport
->tcp_fraghdr
);
1049 if (transport
->tcp_reclen
& RPC_LAST_STREAM_FRAGMENT
)
1050 transport
->tcp_flags
|= TCP_RCV_LAST_FRAG
;
1052 transport
->tcp_flags
&= ~TCP_RCV_LAST_FRAG
;
1053 transport
->tcp_reclen
&= RPC_FRAGMENT_SIZE_MASK
;
1055 transport
->tcp_flags
&= ~TCP_RCV_COPY_FRAGHDR
;
1056 transport
->tcp_offset
= 0;
1058 /* Sanity check of the record length */
1059 if (unlikely(transport
->tcp_reclen
< 8)) {
1060 dprintk("RPC: invalid TCP record fragment length\n");
1061 xs_tcp_force_close(xprt
);
1064 dprintk("RPC: reading TCP record fragment of length %d\n",
1065 transport
->tcp_reclen
);
1068 static void xs_tcp_check_fraghdr(struct sock_xprt
*transport
)
1070 if (transport
->tcp_offset
== transport
->tcp_reclen
) {
1071 transport
->tcp_flags
|= TCP_RCV_COPY_FRAGHDR
;
1072 transport
->tcp_offset
= 0;
1073 if (transport
->tcp_flags
& TCP_RCV_LAST_FRAG
) {
1074 transport
->tcp_flags
&= ~TCP_RCV_COPY_DATA
;
1075 transport
->tcp_flags
|= TCP_RCV_COPY_XID
;
1076 transport
->tcp_copied
= 0;
1081 static inline void xs_tcp_read_xid(struct sock_xprt
*transport
, struct xdr_skb_reader
*desc
)
1086 len
= sizeof(transport
->tcp_xid
) - transport
->tcp_offset
;
1087 dprintk("RPC: reading XID (%Zu bytes)\n", len
);
1088 p
= ((char *) &transport
->tcp_xid
) + transport
->tcp_offset
;
1089 used
= xdr_skb_read_bits(desc
, p
, len
);
1090 transport
->tcp_offset
+= used
;
1093 transport
->tcp_flags
&= ~TCP_RCV_COPY_XID
;
1094 transport
->tcp_flags
|= TCP_RCV_READ_CALLDIR
;
1095 transport
->tcp_copied
= 4;
1096 dprintk("RPC: reading %s XID %08x\n",
1097 (transport
->tcp_flags
& TCP_RPC_REPLY
) ? "reply for"
1099 ntohl(transport
->tcp_xid
));
1100 xs_tcp_check_fraghdr(transport
);
1103 static inline void xs_tcp_read_calldir(struct sock_xprt
*transport
,
1104 struct xdr_skb_reader
*desc
)
1111 * We want transport->tcp_offset to be 8 at the end of this routine
1112 * (4 bytes for the xid and 4 bytes for the call/reply flag).
1113 * When this function is called for the first time,
1114 * transport->tcp_offset is 4 (after having already read the xid).
1116 offset
= transport
->tcp_offset
- sizeof(transport
->tcp_xid
);
1117 len
= sizeof(transport
->tcp_calldir
) - offset
;
1118 dprintk("RPC: reading CALL/REPLY flag (%Zu bytes)\n", len
);
1119 p
= ((char *) &transport
->tcp_calldir
) + offset
;
1120 used
= xdr_skb_read_bits(desc
, p
, len
);
1121 transport
->tcp_offset
+= used
;
1124 transport
->tcp_flags
&= ~TCP_RCV_READ_CALLDIR
;
1126 * We don't yet have the XDR buffer, so we will write the calldir
1127 * out after we get the buffer from the 'struct rpc_rqst'
1129 switch (ntohl(transport
->tcp_calldir
)) {
1131 transport
->tcp_flags
|= TCP_RCV_COPY_CALLDIR
;
1132 transport
->tcp_flags
|= TCP_RCV_COPY_DATA
;
1133 transport
->tcp_flags
|= TCP_RPC_REPLY
;
1136 transport
->tcp_flags
|= TCP_RCV_COPY_CALLDIR
;
1137 transport
->tcp_flags
|= TCP_RCV_COPY_DATA
;
1138 transport
->tcp_flags
&= ~TCP_RPC_REPLY
;
1141 dprintk("RPC: invalid request message type\n");
1142 xs_tcp_force_close(&transport
->xprt
);
1144 xs_tcp_check_fraghdr(transport
);
1147 static inline void xs_tcp_read_common(struct rpc_xprt
*xprt
,
1148 struct xdr_skb_reader
*desc
,
1149 struct rpc_rqst
*req
)
1151 struct sock_xprt
*transport
=
1152 container_of(xprt
, struct sock_xprt
, xprt
);
1153 struct xdr_buf
*rcvbuf
;
1157 rcvbuf
= &req
->rq_private_buf
;
1159 if (transport
->tcp_flags
& TCP_RCV_COPY_CALLDIR
) {
1161 * Save the RPC direction in the XDR buffer
1163 memcpy(rcvbuf
->head
[0].iov_base
+ transport
->tcp_copied
,
1164 &transport
->tcp_calldir
,
1165 sizeof(transport
->tcp_calldir
));
1166 transport
->tcp_copied
+= sizeof(transport
->tcp_calldir
);
1167 transport
->tcp_flags
&= ~TCP_RCV_COPY_CALLDIR
;
1171 if (len
> transport
->tcp_reclen
- transport
->tcp_offset
) {
1172 struct xdr_skb_reader my_desc
;
1174 len
= transport
->tcp_reclen
- transport
->tcp_offset
;
1175 memcpy(&my_desc
, desc
, sizeof(my_desc
));
1176 my_desc
.count
= len
;
1177 r
= xdr_partial_copy_from_skb(rcvbuf
, transport
->tcp_copied
,
1178 &my_desc
, xdr_skb_read_bits
);
1182 r
= xdr_partial_copy_from_skb(rcvbuf
, transport
->tcp_copied
,
1183 desc
, xdr_skb_read_bits
);
1186 transport
->tcp_copied
+= r
;
1187 transport
->tcp_offset
+= r
;
1190 /* Error when copying to the receive buffer,
1191 * usually because we weren't able to allocate
1192 * additional buffer pages. All we can do now
1193 * is turn off TCP_RCV_COPY_DATA, so the request
1194 * will not receive any additional updates,
1196 * Any remaining data from this record will
1199 transport
->tcp_flags
&= ~TCP_RCV_COPY_DATA
;
1200 dprintk("RPC: XID %08x truncated request\n",
1201 ntohl(transport
->tcp_xid
));
1202 dprintk("RPC: xprt = %p, tcp_copied = %lu, "
1203 "tcp_offset = %u, tcp_reclen = %u\n",
1204 xprt
, transport
->tcp_copied
,
1205 transport
->tcp_offset
, transport
->tcp_reclen
);
1209 dprintk("RPC: XID %08x read %Zd bytes\n",
1210 ntohl(transport
->tcp_xid
), r
);
1211 dprintk("RPC: xprt = %p, tcp_copied = %lu, tcp_offset = %u, "
1212 "tcp_reclen = %u\n", xprt
, transport
->tcp_copied
,
1213 transport
->tcp_offset
, transport
->tcp_reclen
);
1215 if (transport
->tcp_copied
== req
->rq_private_buf
.buflen
)
1216 transport
->tcp_flags
&= ~TCP_RCV_COPY_DATA
;
1217 else if (transport
->tcp_offset
== transport
->tcp_reclen
) {
1218 if (transport
->tcp_flags
& TCP_RCV_LAST_FRAG
)
1219 transport
->tcp_flags
&= ~TCP_RCV_COPY_DATA
;
1224 * Finds the request corresponding to the RPC xid and invokes the common
1225 * tcp read code to read the data.
1227 static inline int xs_tcp_read_reply(struct rpc_xprt
*xprt
,
1228 struct xdr_skb_reader
*desc
)
1230 struct sock_xprt
*transport
=
1231 container_of(xprt
, struct sock_xprt
, xprt
);
1232 struct rpc_rqst
*req
;
1234 dprintk("RPC: read reply XID %08x\n", ntohl(transport
->tcp_xid
));
1236 /* Find and lock the request corresponding to this xid */
1237 spin_lock(&xprt
->transport_lock
);
1238 req
= xprt_lookup_rqst(xprt
, transport
->tcp_xid
);
1240 dprintk("RPC: XID %08x request not found!\n",
1241 ntohl(transport
->tcp_xid
));
1242 spin_unlock(&xprt
->transport_lock
);
1246 xs_tcp_read_common(xprt
, desc
, req
);
1248 if (!(transport
->tcp_flags
& TCP_RCV_COPY_DATA
))
1249 xprt_complete_rqst(req
->rq_task
, transport
->tcp_copied
);
1251 spin_unlock(&xprt
->transport_lock
);
1255 #if defined(CONFIG_SUNRPC_BACKCHANNEL)
1257 * Obtains an rpc_rqst previously allocated and invokes the common
1258 * tcp read code to read the data. The result is placed in the callback
1260 * If we're unable to obtain the rpc_rqst we schedule the closing of the
1261 * connection and return -1.
1263 static inline int xs_tcp_read_callback(struct rpc_xprt
*xprt
,
1264 struct xdr_skb_reader
*desc
)
1266 struct sock_xprt
*transport
=
1267 container_of(xprt
, struct sock_xprt
, xprt
);
1268 struct rpc_rqst
*req
;
1270 req
= xprt_alloc_bc_request(xprt
);
1272 printk(KERN_WARNING
"Callback slot table overflowed\n");
1273 xprt_force_disconnect(xprt
);
1277 req
->rq_xid
= transport
->tcp_xid
;
1278 dprintk("RPC: read callback XID %08x\n", ntohl(req
->rq_xid
));
1279 xs_tcp_read_common(xprt
, desc
, req
);
1281 if (!(transport
->tcp_flags
& TCP_RCV_COPY_DATA
)) {
1282 struct svc_serv
*bc_serv
= xprt
->bc_serv
;
1285 * Add callback request to callback list. The callback
1286 * service sleeps on the sv_cb_waitq waiting for new
1287 * requests. Wake it up after adding enqueing the
1290 dprintk("RPC: add callback request to list\n");
1291 spin_lock(&bc_serv
->sv_cb_lock
);
1292 list_add(&req
->rq_bc_list
, &bc_serv
->sv_cb_list
);
1293 spin_unlock(&bc_serv
->sv_cb_lock
);
1294 wake_up(&bc_serv
->sv_cb_waitq
);
1297 req
->rq_private_buf
.len
= transport
->tcp_copied
;
1302 static inline int _xs_tcp_read_data(struct rpc_xprt
*xprt
,
1303 struct xdr_skb_reader
*desc
)
1305 struct sock_xprt
*transport
=
1306 container_of(xprt
, struct sock_xprt
, xprt
);
1308 return (transport
->tcp_flags
& TCP_RPC_REPLY
) ?
1309 xs_tcp_read_reply(xprt
, desc
) :
1310 xs_tcp_read_callback(xprt
, desc
);
1313 static inline int _xs_tcp_read_data(struct rpc_xprt
*xprt
,
1314 struct xdr_skb_reader
*desc
)
1316 return xs_tcp_read_reply(xprt
, desc
);
1318 #endif /* CONFIG_SUNRPC_BACKCHANNEL */
1321 * Read data off the transport. This can be either an RPC_CALL or an
1322 * RPC_REPLY. Relay the processing to helper functions.
1324 static void xs_tcp_read_data(struct rpc_xprt
*xprt
,
1325 struct xdr_skb_reader
*desc
)
1327 struct sock_xprt
*transport
=
1328 container_of(xprt
, struct sock_xprt
, xprt
);
1330 if (_xs_tcp_read_data(xprt
, desc
) == 0)
1331 xs_tcp_check_fraghdr(transport
);
1334 * The transport_lock protects the request handling.
1335 * There's no need to hold it to update the tcp_flags.
1337 transport
->tcp_flags
&= ~TCP_RCV_COPY_DATA
;
1341 static inline void xs_tcp_read_discard(struct sock_xprt
*transport
, struct xdr_skb_reader
*desc
)
1345 len
= transport
->tcp_reclen
- transport
->tcp_offset
;
1346 if (len
> desc
->count
)
1349 desc
->offset
+= len
;
1350 transport
->tcp_offset
+= len
;
1351 dprintk("RPC: discarded %Zu bytes\n", len
);
1352 xs_tcp_check_fraghdr(transport
);
1355 static int xs_tcp_data_recv(read_descriptor_t
*rd_desc
, struct sk_buff
*skb
, unsigned int offset
, size_t len
)
1357 struct rpc_xprt
*xprt
= rd_desc
->arg
.data
;
1358 struct sock_xprt
*transport
= container_of(xprt
, struct sock_xprt
, xprt
);
1359 struct xdr_skb_reader desc
= {
1365 dprintk("RPC: xs_tcp_data_recv started\n");
1367 /* Read in a new fragment marker if necessary */
1368 /* Can we ever really expect to get completely empty fragments? */
1369 if (transport
->tcp_flags
& TCP_RCV_COPY_FRAGHDR
) {
1370 xs_tcp_read_fraghdr(xprt
, &desc
);
1373 /* Read in the xid if necessary */
1374 if (transport
->tcp_flags
& TCP_RCV_COPY_XID
) {
1375 xs_tcp_read_xid(transport
, &desc
);
1378 /* Read in the call/reply flag */
1379 if (transport
->tcp_flags
& TCP_RCV_READ_CALLDIR
) {
1380 xs_tcp_read_calldir(transport
, &desc
);
1383 /* Read in the request data */
1384 if (transport
->tcp_flags
& TCP_RCV_COPY_DATA
) {
1385 xs_tcp_read_data(xprt
, &desc
);
1388 /* Skip over any trailing bytes on short reads */
1389 xs_tcp_read_discard(transport
, &desc
);
1390 } while (desc
.count
);
1391 dprintk("RPC: xs_tcp_data_recv done\n");
1392 return len
- desc
.count
;
1396 * xs_tcp_data_ready - "data ready" callback for TCP sockets
1397 * @sk: socket with data to read
1398 * @bytes: how much data to read
1401 static void xs_tcp_data_ready(struct sock
*sk
, int bytes
)
1403 struct rpc_xprt
*xprt
;
1404 read_descriptor_t rd_desc
;
1407 dprintk("RPC: xs_tcp_data_ready...\n");
1409 read_lock_bh(&sk
->sk_callback_lock
);
1410 if (!(xprt
= xprt_from_sock(sk
)))
1412 /* Any data means we had a useful conversation, so
1413 * the we don't need to delay the next reconnect
1415 if (xprt
->reestablish_timeout
)
1416 xprt
->reestablish_timeout
= 0;
1418 /* We use rd_desc to pass struct xprt to xs_tcp_data_recv */
1419 rd_desc
.arg
.data
= xprt
;
1421 rd_desc
.count
= 65536;
1422 read
= tcp_read_sock(sk
, &rd_desc
, xs_tcp_data_recv
);
1425 read_unlock_bh(&sk
->sk_callback_lock
);
1429 * Do the equivalent of linger/linger2 handling for dealing with
1430 * broken servers that don't close the socket in a timely
1433 static void xs_tcp_schedule_linger_timeout(struct rpc_xprt
*xprt
,
1434 unsigned long timeout
)
1436 struct sock_xprt
*transport
;
1438 if (xprt_test_and_set_connecting(xprt
))
1440 set_bit(XPRT_CONNECTION_ABORT
, &xprt
->state
);
1441 transport
= container_of(xprt
, struct sock_xprt
, xprt
);
1442 queue_delayed_work(rpciod_workqueue
, &transport
->connect_worker
,
1446 static void xs_tcp_cancel_linger_timeout(struct rpc_xprt
*xprt
)
1448 struct sock_xprt
*transport
;
1450 transport
= container_of(xprt
, struct sock_xprt
, xprt
);
1452 if (!test_bit(XPRT_CONNECTION_ABORT
, &xprt
->state
) ||
1453 !cancel_delayed_work(&transport
->connect_worker
))
1455 clear_bit(XPRT_CONNECTION_ABORT
, &xprt
->state
);
1456 xprt_clear_connecting(xprt
);
1459 static void xs_sock_reset_connection_flags(struct rpc_xprt
*xprt
)
1461 smp_mb__before_clear_bit();
1462 clear_bit(XPRT_CONNECTION_ABORT
, &xprt
->state
);
1463 clear_bit(XPRT_CONNECTION_CLOSE
, &xprt
->state
);
1464 clear_bit(XPRT_CLOSE_WAIT
, &xprt
->state
);
1465 clear_bit(XPRT_CLOSING
, &xprt
->state
);
1466 smp_mb__after_clear_bit();
1469 static void xs_sock_mark_closed(struct rpc_xprt
*xprt
)
1471 xs_sock_reset_connection_flags(xprt
);
1472 /* Mark transport as closed and wake up all pending tasks */
1473 xprt_disconnect_done(xprt
);
1477 * xs_tcp_state_change - callback to handle TCP socket state changes
1478 * @sk: socket whose state has changed
1481 static void xs_tcp_state_change(struct sock
*sk
)
1483 struct rpc_xprt
*xprt
;
1485 read_lock_bh(&sk
->sk_callback_lock
);
1486 if (!(xprt
= xprt_from_sock(sk
)))
1488 dprintk("RPC: xs_tcp_state_change client %p...\n", xprt
);
1489 dprintk("RPC: state %x conn %d dead %d zapped %d sk_shutdown %d\n",
1490 sk
->sk_state
, xprt_connected(xprt
),
1491 sock_flag(sk
, SOCK_DEAD
),
1492 sock_flag(sk
, SOCK_ZAPPED
),
1495 switch (sk
->sk_state
) {
1496 case TCP_ESTABLISHED
:
1497 spin_lock(&xprt
->transport_lock
);
1498 if (!xprt_test_and_set_connected(xprt
)) {
1499 struct sock_xprt
*transport
= container_of(xprt
,
1500 struct sock_xprt
, xprt
);
1502 /* Reset TCP record info */
1503 transport
->tcp_offset
= 0;
1504 transport
->tcp_reclen
= 0;
1505 transport
->tcp_copied
= 0;
1506 transport
->tcp_flags
=
1507 TCP_RCV_COPY_FRAGHDR
| TCP_RCV_COPY_XID
;
1509 xprt_wake_pending_tasks(xprt
, -EAGAIN
);
1511 spin_unlock(&xprt
->transport_lock
);
1514 /* The client initiated a shutdown of the socket */
1515 xprt
->connect_cookie
++;
1516 xprt
->reestablish_timeout
= 0;
1517 set_bit(XPRT_CLOSING
, &xprt
->state
);
1518 smp_mb__before_clear_bit();
1519 clear_bit(XPRT_CONNECTED
, &xprt
->state
);
1520 clear_bit(XPRT_CLOSE_WAIT
, &xprt
->state
);
1521 smp_mb__after_clear_bit();
1522 xs_tcp_schedule_linger_timeout(xprt
, xs_tcp_fin_timeout
);
1524 case TCP_CLOSE_WAIT
:
1525 /* The server initiated a shutdown of the socket */
1526 xprt
->connect_cookie
++;
1527 clear_bit(XPRT_CONNECTED
, &xprt
->state
);
1528 xs_tcp_force_close(xprt
);
1531 * If the server closed down the connection, make sure that
1532 * we back off before reconnecting
1534 if (xprt
->reestablish_timeout
< XS_TCP_INIT_REEST_TO
)
1535 xprt
->reestablish_timeout
= XS_TCP_INIT_REEST_TO
;
1538 set_bit(XPRT_CLOSING
, &xprt
->state
);
1539 xs_tcp_schedule_linger_timeout(xprt
, xs_tcp_fin_timeout
);
1540 smp_mb__before_clear_bit();
1541 clear_bit(XPRT_CONNECTED
, &xprt
->state
);
1542 smp_mb__after_clear_bit();
1545 xs_tcp_cancel_linger_timeout(xprt
);
1546 xs_sock_mark_closed(xprt
);
1549 read_unlock_bh(&sk
->sk_callback_lock
);
1552 static void xs_write_space(struct sock
*sk
)
1554 struct socket
*sock
;
1555 struct rpc_xprt
*xprt
;
1557 if (unlikely(!(sock
= sk
->sk_socket
)))
1559 clear_bit(SOCK_NOSPACE
, &sock
->flags
);
1561 if (unlikely(!(xprt
= xprt_from_sock(sk
))))
1563 if (test_and_clear_bit(SOCK_ASYNC_NOSPACE
, &sock
->flags
) == 0)
1566 xprt_write_space(xprt
);
1570 * xs_udp_write_space - callback invoked when socket buffer space
1572 * @sk: socket whose state has changed
1574 * Called when more output buffer space is available for this socket.
1575 * We try not to wake our writers until they can make "significant"
1576 * progress, otherwise we'll waste resources thrashing kernel_sendmsg
1577 * with a bunch of small requests.
1579 static void xs_udp_write_space(struct sock
*sk
)
1581 read_lock_bh(&sk
->sk_callback_lock
);
1583 /* from net/core/sock.c:sock_def_write_space */
1584 if (sock_writeable(sk
))
1587 read_unlock_bh(&sk
->sk_callback_lock
);
1591 * xs_tcp_write_space - callback invoked when socket buffer space
1593 * @sk: socket whose state has changed
1595 * Called when more output buffer space is available for this socket.
1596 * We try not to wake our writers until they can make "significant"
1597 * progress, otherwise we'll waste resources thrashing kernel_sendmsg
1598 * with a bunch of small requests.
1600 static void xs_tcp_write_space(struct sock
*sk
)
1602 read_lock_bh(&sk
->sk_callback_lock
);
1604 /* from net/core/stream.c:sk_stream_write_space */
1605 if (sk_stream_wspace(sk
) >= sk_stream_min_wspace(sk
))
1608 read_unlock_bh(&sk
->sk_callback_lock
);
1611 static void xs_udp_do_set_buffer_size(struct rpc_xprt
*xprt
)
1613 struct sock_xprt
*transport
= container_of(xprt
, struct sock_xprt
, xprt
);
1614 struct sock
*sk
= transport
->inet
;
1616 if (transport
->rcvsize
) {
1617 sk
->sk_userlocks
|= SOCK_RCVBUF_LOCK
;
1618 sk
->sk_rcvbuf
= transport
->rcvsize
* xprt
->max_reqs
* 2;
1620 if (transport
->sndsize
) {
1621 sk
->sk_userlocks
|= SOCK_SNDBUF_LOCK
;
1622 sk
->sk_sndbuf
= transport
->sndsize
* xprt
->max_reqs
* 2;
1623 sk
->sk_write_space(sk
);
1628 * xs_udp_set_buffer_size - set send and receive limits
1629 * @xprt: generic transport
1630 * @sndsize: requested size of send buffer, in bytes
1631 * @rcvsize: requested size of receive buffer, in bytes
1633 * Set socket send and receive buffer size limits.
1635 static void xs_udp_set_buffer_size(struct rpc_xprt
*xprt
, size_t sndsize
, size_t rcvsize
)
1637 struct sock_xprt
*transport
= container_of(xprt
, struct sock_xprt
, xprt
);
1639 transport
->sndsize
= 0;
1641 transport
->sndsize
= sndsize
+ 1024;
1642 transport
->rcvsize
= 0;
1644 transport
->rcvsize
= rcvsize
+ 1024;
1646 xs_udp_do_set_buffer_size(xprt
);
1650 * xs_udp_timer - called when a retransmit timeout occurs on a UDP transport
1651 * @task: task that timed out
1653 * Adjust the congestion window after a retransmit timeout has occurred.
1655 static void xs_udp_timer(struct rpc_xprt
*xprt
, struct rpc_task
*task
)
1657 xprt_adjust_cwnd(xprt
, task
, -ETIMEDOUT
);
1660 static unsigned short xs_get_random_port(void)
1662 unsigned short range
= xprt_max_resvport
- xprt_min_resvport
;
1663 unsigned short rand
= (unsigned short) net_random() % range
;
1664 return rand
+ xprt_min_resvport
;
1668 * xs_set_port - reset the port number in the remote endpoint address
1669 * @xprt: generic transport
1670 * @port: new port number
1673 static void xs_set_port(struct rpc_xprt
*xprt
, unsigned short port
)
1675 dprintk("RPC: setting port for xprt %p to %u\n", xprt
, port
);
1677 rpc_set_port(xs_addr(xprt
), port
);
1678 xs_update_peer_port(xprt
);
1681 static unsigned short xs_get_srcport(struct sock_xprt
*transport
)
1683 unsigned short port
= transport
->srcport
;
1685 if (port
== 0 && transport
->xprt
.resvport
)
1686 port
= xs_get_random_port();
1690 static unsigned short xs_next_srcport(struct sock_xprt
*transport
, unsigned short port
)
1692 if (transport
->srcport
!= 0)
1693 transport
->srcport
= 0;
1694 if (!transport
->xprt
.resvport
)
1696 if (port
<= xprt_min_resvport
|| port
> xprt_max_resvport
)
1697 return xprt_max_resvport
;
1700 static int xs_bind(struct sock_xprt
*transport
, struct socket
*sock
)
1702 struct sockaddr_storage myaddr
;
1704 unsigned short port
= xs_get_srcport(transport
);
1705 unsigned short last
;
1707 memcpy(&myaddr
, &transport
->srcaddr
, transport
->xprt
.addrlen
);
1709 rpc_set_port((struct sockaddr
*)&myaddr
, port
);
1710 err
= kernel_bind(sock
, (struct sockaddr
*)&myaddr
,
1711 transport
->xprt
.addrlen
);
1715 transport
->srcport
= port
;
1719 port
= xs_next_srcport(transport
, port
);
1722 } while (err
== -EADDRINUSE
&& nloop
!= 2);
1724 if (myaddr
.ss_family
== AF_INET
)
1725 dprintk("RPC: %s %pI4:%u: %s (%d)\n", __func__
,
1726 &((struct sockaddr_in
*)&myaddr
)->sin_addr
,
1727 port
, err
? "failed" : "ok", err
);
1729 dprintk("RPC: %s %pI6:%u: %s (%d)\n", __func__
,
1730 &((struct sockaddr_in6
*)&myaddr
)->sin6_addr
,
1731 port
, err
? "failed" : "ok", err
);
1736 * We don't support autobind on AF_LOCAL sockets
1738 static void xs_local_rpcbind(struct rpc_task
*task
)
1741 xprt_set_bound(rcu_dereference(task
->tk_client
->cl_xprt
));
1745 static void xs_local_set_port(struct rpc_xprt
*xprt
, unsigned short port
)
1749 #ifdef CONFIG_DEBUG_LOCK_ALLOC
1750 static struct lock_class_key xs_key
[2];
1751 static struct lock_class_key xs_slock_key
[2];
1753 static inline void xs_reclassify_socketu(struct socket
*sock
)
1755 struct sock
*sk
= sock
->sk
;
1757 sock_lock_init_class_and_name(sk
, "slock-AF_LOCAL-RPC",
1758 &xs_slock_key
[1], "sk_lock-AF_LOCAL-RPC", &xs_key
[1]);
1761 static inline void xs_reclassify_socket4(struct socket
*sock
)
1763 struct sock
*sk
= sock
->sk
;
1765 sock_lock_init_class_and_name(sk
, "slock-AF_INET-RPC",
1766 &xs_slock_key
[0], "sk_lock-AF_INET-RPC", &xs_key
[0]);
1769 static inline void xs_reclassify_socket6(struct socket
*sock
)
1771 struct sock
*sk
= sock
->sk
;
1773 sock_lock_init_class_and_name(sk
, "slock-AF_INET6-RPC",
1774 &xs_slock_key
[1], "sk_lock-AF_INET6-RPC", &xs_key
[1]);
1777 static inline void xs_reclassify_socket(int family
, struct socket
*sock
)
1779 WARN_ON_ONCE(sock_owned_by_user(sock
->sk
));
1780 if (sock_owned_by_user(sock
->sk
))
1785 xs_reclassify_socketu(sock
);
1788 xs_reclassify_socket4(sock
);
1791 xs_reclassify_socket6(sock
);
1796 static inline void xs_reclassify_socketu(struct socket
*sock
)
1800 static inline void xs_reclassify_socket4(struct socket
*sock
)
1804 static inline void xs_reclassify_socket6(struct socket
*sock
)
1808 static inline void xs_reclassify_socket(int family
, struct socket
*sock
)
1813 static struct socket
*xs_create_sock(struct rpc_xprt
*xprt
,
1814 struct sock_xprt
*transport
, int family
, int type
, int protocol
)
1816 struct socket
*sock
;
1819 err
= __sock_create(xprt
->xprt_net
, family
, type
, protocol
, &sock
, 1);
1821 dprintk("RPC: can't create %d transport socket (%d).\n",
1825 xs_reclassify_socket(family
, sock
);
1827 err
= xs_bind(transport
, sock
);
1835 return ERR_PTR(err
);
1838 static int xs_local_finish_connecting(struct rpc_xprt
*xprt
,
1839 struct socket
*sock
)
1841 struct sock_xprt
*transport
= container_of(xprt
, struct sock_xprt
,
1844 if (!transport
->inet
) {
1845 struct sock
*sk
= sock
->sk
;
1847 write_lock_bh(&sk
->sk_callback_lock
);
1849 xs_save_old_callbacks(transport
, sk
);
1851 sk
->sk_user_data
= xprt
;
1852 sk
->sk_data_ready
= xs_local_data_ready
;
1853 sk
->sk_write_space
= xs_udp_write_space
;
1854 sk
->sk_allocation
= GFP_ATOMIC
;
1856 xprt_clear_connected(xprt
);
1858 /* Reset to new socket */
1859 transport
->sock
= sock
;
1860 transport
->inet
= sk
;
1862 write_unlock_bh(&sk
->sk_callback_lock
);
1865 /* Tell the socket layer to start connecting... */
1866 xprt
->stat
.connect_count
++;
1867 xprt
->stat
.connect_start
= jiffies
;
1868 return kernel_connect(sock
, xs_addr(xprt
), xprt
->addrlen
, 0);
1872 * xs_local_setup_socket - create AF_LOCAL socket, connect to a local endpoint
1873 * @xprt: RPC transport to connect
1874 * @transport: socket transport to connect
1875 * @create_sock: function to create a socket of the correct type
1877 static int xs_local_setup_socket(struct sock_xprt
*transport
)
1879 struct rpc_xprt
*xprt
= &transport
->xprt
;
1880 struct socket
*sock
;
1883 current
->flags
|= PF_FSTRANS
;
1885 clear_bit(XPRT_CONNECTION_ABORT
, &xprt
->state
);
1886 status
= __sock_create(xprt
->xprt_net
, AF_LOCAL
,
1887 SOCK_STREAM
, 0, &sock
, 1);
1889 dprintk("RPC: can't create AF_LOCAL "
1890 "transport socket (%d).\n", -status
);
1893 xs_reclassify_socketu(sock
);
1895 dprintk("RPC: worker connecting xprt %p via AF_LOCAL to %s\n",
1896 xprt
, xprt
->address_strings
[RPC_DISPLAY_ADDR
]);
1898 status
= xs_local_finish_connecting(xprt
, sock
);
1901 dprintk("RPC: xprt %p connected to %s\n",
1902 xprt
, xprt
->address_strings
[RPC_DISPLAY_ADDR
]);
1903 xprt_set_connected(xprt
);
1906 dprintk("RPC: xprt %p: socket %s does not exist\n",
1907 xprt
, xprt
->address_strings
[RPC_DISPLAY_ADDR
]);
1910 dprintk("RPC: xprt %p: connection refused for %s\n",
1911 xprt
, xprt
->address_strings
[RPC_DISPLAY_ADDR
]);
1914 printk(KERN_ERR
"%s: unhandled error (%d) connecting to %s\n",
1916 xprt
->address_strings
[RPC_DISPLAY_ADDR
]);
1920 xprt_clear_connecting(xprt
);
1921 xprt_wake_pending_tasks(xprt
, status
);
1922 current
->flags
&= ~PF_FSTRANS
;
1926 static void xs_local_connect(struct rpc_xprt
*xprt
, struct rpc_task
*task
)
1928 struct sock_xprt
*transport
= container_of(xprt
, struct sock_xprt
, xprt
);
1931 if (RPC_IS_ASYNC(task
)) {
1933 * We want the AF_LOCAL connect to be resolved in the
1934 * filesystem namespace of the process making the rpc
1935 * call. Thus we connect synchronously.
1937 * If we want to support asynchronous AF_LOCAL calls,
1938 * we'll need to figure out how to pass a namespace to
1941 rpc_exit(task
, -ENOTCONN
);
1944 ret
= xs_local_setup_socket(transport
);
1945 if (ret
&& !RPC_IS_SOFTCONN(task
))
1946 msleep_interruptible(15000);
1949 #ifdef CONFIG_SUNRPC_SWAP
1950 static void xs_set_memalloc(struct rpc_xprt
*xprt
)
1952 struct sock_xprt
*transport
= container_of(xprt
, struct sock_xprt
,
1956 sk_set_memalloc(transport
->inet
);
1960 * xs_swapper - Tag this transport as being used for swap.
1961 * @xprt: transport to tag
1962 * @enable: enable/disable
1965 int xs_swapper(struct rpc_xprt
*xprt
, int enable
)
1967 struct sock_xprt
*transport
= container_of(xprt
, struct sock_xprt
,
1973 xs_set_memalloc(xprt
);
1974 } else if (xprt
->swapper
) {
1976 sk_clear_memalloc(transport
->inet
);
1981 EXPORT_SYMBOL_GPL(xs_swapper
);
1983 static void xs_set_memalloc(struct rpc_xprt
*xprt
)
1988 static void xs_udp_finish_connecting(struct rpc_xprt
*xprt
, struct socket
*sock
)
1990 struct sock_xprt
*transport
= container_of(xprt
, struct sock_xprt
, xprt
);
1992 if (!transport
->inet
) {
1993 struct sock
*sk
= sock
->sk
;
1995 write_lock_bh(&sk
->sk_callback_lock
);
1997 xs_save_old_callbacks(transport
, sk
);
1999 sk
->sk_user_data
= xprt
;
2000 sk
->sk_data_ready
= xs_udp_data_ready
;
2001 sk
->sk_write_space
= xs_udp_write_space
;
2002 sk
->sk_no_check
= UDP_CSUM_NORCV
;
2003 sk
->sk_allocation
= GFP_ATOMIC
;
2005 xprt_set_connected(xprt
);
2007 /* Reset to new socket */
2008 transport
->sock
= sock
;
2009 transport
->inet
= sk
;
2011 xs_set_memalloc(xprt
);
2013 write_unlock_bh(&sk
->sk_callback_lock
);
2015 xs_udp_do_set_buffer_size(xprt
);
2018 static void xs_udp_setup_socket(struct work_struct
*work
)
2020 struct sock_xprt
*transport
=
2021 container_of(work
, struct sock_xprt
, connect_worker
.work
);
2022 struct rpc_xprt
*xprt
= &transport
->xprt
;
2023 struct socket
*sock
= transport
->sock
;
2026 current
->flags
|= PF_FSTRANS
;
2028 /* Start by resetting any existing state */
2029 xs_reset_transport(transport
);
2030 sock
= xs_create_sock(xprt
, transport
,
2031 xs_addr(xprt
)->sa_family
, SOCK_DGRAM
, IPPROTO_UDP
);
2035 dprintk("RPC: worker connecting xprt %p via %s to "
2036 "%s (port %s)\n", xprt
,
2037 xprt
->address_strings
[RPC_DISPLAY_PROTO
],
2038 xprt
->address_strings
[RPC_DISPLAY_ADDR
],
2039 xprt
->address_strings
[RPC_DISPLAY_PORT
]);
2041 xs_udp_finish_connecting(xprt
, sock
);
2044 xprt_clear_connecting(xprt
);
2045 xprt_wake_pending_tasks(xprt
, status
);
2046 current
->flags
&= ~PF_FSTRANS
;
2050 * We need to preserve the port number so the reply cache on the server can
2051 * find our cached RPC replies when we get around to reconnecting.
2053 static void xs_abort_connection(struct sock_xprt
*transport
)
2056 struct sockaddr any
;
2058 dprintk("RPC: disconnecting xprt %p to reuse port\n", transport
);
2061 * Disconnect the transport socket by doing a connect operation
2062 * with AF_UNSPEC. This should return immediately...
2064 memset(&any
, 0, sizeof(any
));
2065 any
.sa_family
= AF_UNSPEC
;
2066 result
= kernel_connect(transport
->sock
, &any
, sizeof(any
), 0);
2068 xs_sock_reset_connection_flags(&transport
->xprt
);
2069 dprintk("RPC: AF_UNSPEC connect return code %d\n", result
);
2072 static void xs_tcp_reuse_connection(struct sock_xprt
*transport
)
2074 unsigned int state
= transport
->inet
->sk_state
;
2076 if (state
== TCP_CLOSE
&& transport
->sock
->state
== SS_UNCONNECTED
) {
2077 /* we don't need to abort the connection if the socket
2078 * hasn't undergone a shutdown
2080 if (transport
->inet
->sk_shutdown
== 0)
2082 dprintk("RPC: %s: TCP_CLOSEd and sk_shutdown set to %d\n",
2083 __func__
, transport
->inet
->sk_shutdown
);
2085 if ((1 << state
) & (TCPF_ESTABLISHED
|TCPF_SYN_SENT
)) {
2086 /* we don't need to abort the connection if the socket
2087 * hasn't undergone a shutdown
2089 if (transport
->inet
->sk_shutdown
== 0)
2091 dprintk("RPC: %s: ESTABLISHED/SYN_SENT "
2092 "sk_shutdown set to %d\n",
2093 __func__
, transport
->inet
->sk_shutdown
);
2095 xs_abort_connection(transport
);
2098 static int xs_tcp_finish_connecting(struct rpc_xprt
*xprt
, struct socket
*sock
)
2100 struct sock_xprt
*transport
= container_of(xprt
, struct sock_xprt
, xprt
);
2101 int ret
= -ENOTCONN
;
2103 if (!transport
->inet
) {
2104 struct sock
*sk
= sock
->sk
;
2106 write_lock_bh(&sk
->sk_callback_lock
);
2108 xs_save_old_callbacks(transport
, sk
);
2110 sk
->sk_user_data
= xprt
;
2111 sk
->sk_data_ready
= xs_tcp_data_ready
;
2112 sk
->sk_state_change
= xs_tcp_state_change
;
2113 sk
->sk_write_space
= xs_tcp_write_space
;
2114 sk
->sk_allocation
= GFP_ATOMIC
;
2116 /* socket options */
2117 sk
->sk_userlocks
|= SOCK_BINDPORT_LOCK
;
2118 sock_reset_flag(sk
, SOCK_LINGER
);
2119 tcp_sk(sk
)->linger2
= 0;
2120 tcp_sk(sk
)->nonagle
|= TCP_NAGLE_OFF
;
2122 xprt_clear_connected(xprt
);
2124 /* Reset to new socket */
2125 transport
->sock
= sock
;
2126 transport
->inet
= sk
;
2128 write_unlock_bh(&sk
->sk_callback_lock
);
2131 if (!xprt_bound(xprt
))
2134 xs_set_memalloc(xprt
);
2136 /* Tell the socket layer to start connecting... */
2137 xprt
->stat
.connect_count
++;
2138 xprt
->stat
.connect_start
= jiffies
;
2139 ret
= kernel_connect(sock
, xs_addr(xprt
), xprt
->addrlen
, O_NONBLOCK
);
2144 xprt
->connect_cookie
++;
2145 if (xprt
->reestablish_timeout
< XS_TCP_INIT_REEST_TO
)
2146 xprt
->reestablish_timeout
= XS_TCP_INIT_REEST_TO
;
2153 * xs_tcp_setup_socket - create a TCP socket and connect to a remote endpoint
2154 * @xprt: RPC transport to connect
2155 * @transport: socket transport to connect
2156 * @create_sock: function to create a socket of the correct type
2158 * Invoked by a work queue tasklet.
2160 static void xs_tcp_setup_socket(struct work_struct
*work
)
2162 struct sock_xprt
*transport
=
2163 container_of(work
, struct sock_xprt
, connect_worker
.work
);
2164 struct socket
*sock
= transport
->sock
;
2165 struct rpc_xprt
*xprt
= &transport
->xprt
;
2168 current
->flags
|= PF_FSTRANS
;
2171 clear_bit(XPRT_CONNECTION_ABORT
, &xprt
->state
);
2172 sock
= xs_create_sock(xprt
, transport
,
2173 xs_addr(xprt
)->sa_family
, SOCK_STREAM
, IPPROTO_TCP
);
2175 status
= PTR_ERR(sock
);
2181 abort_and_exit
= test_and_clear_bit(XPRT_CONNECTION_ABORT
,
2183 /* "close" the socket, preserving the local port */
2184 xs_tcp_reuse_connection(transport
);
2190 dprintk("RPC: worker connecting xprt %p via %s to "
2191 "%s (port %s)\n", xprt
,
2192 xprt
->address_strings
[RPC_DISPLAY_PROTO
],
2193 xprt
->address_strings
[RPC_DISPLAY_ADDR
],
2194 xprt
->address_strings
[RPC_DISPLAY_PORT
]);
2196 status
= xs_tcp_finish_connecting(xprt
, sock
);
2197 dprintk("RPC: %p connect status %d connected %d sock state %d\n",
2198 xprt
, -status
, xprt_connected(xprt
),
2199 sock
->sk
->sk_state
);
2202 printk("%s: connect returned unhandled error %d\n",
2204 case -EADDRNOTAVAIL
:
2205 /* We're probably in TIME_WAIT. Get rid of existing socket,
2208 xs_tcp_force_close(xprt
);
2213 xprt_clear_connecting(xprt
);
2214 current
->flags
&= ~PF_FSTRANS
;
2217 /* Happens, for instance, if the user specified a link
2218 * local IPv6 address without a scope-id.
2223 /* retry with existing socket, after a delay */
2229 xprt_clear_connecting(xprt
);
2230 xprt_wake_pending_tasks(xprt
, status
);
2231 current
->flags
&= ~PF_FSTRANS
;
2235 * xs_connect - connect a socket to a remote endpoint
2236 * @xprt: pointer to transport structure
2237 * @task: address of RPC task that manages state of connect request
2239 * TCP: If the remote end dropped the connection, delay reconnecting.
2241 * UDP socket connects are synchronous, but we use a work queue anyway
2242 * to guarantee that even unprivileged user processes can set up a
2243 * socket on a privileged port.
2245 * If a UDP socket connect fails, the delay behavior here prevents
2246 * retry floods (hard mounts).
2248 static void xs_connect(struct rpc_xprt
*xprt
, struct rpc_task
*task
)
2250 struct sock_xprt
*transport
= container_of(xprt
, struct sock_xprt
, xprt
);
2252 if (transport
->sock
!= NULL
&& !RPC_IS_SOFTCONN(task
)) {
2253 dprintk("RPC: xs_connect delayed xprt %p for %lu "
2255 xprt
, xprt
->reestablish_timeout
/ HZ
);
2256 queue_delayed_work(rpciod_workqueue
,
2257 &transport
->connect_worker
,
2258 xprt
->reestablish_timeout
);
2259 xprt
->reestablish_timeout
<<= 1;
2260 if (xprt
->reestablish_timeout
< XS_TCP_INIT_REEST_TO
)
2261 xprt
->reestablish_timeout
= XS_TCP_INIT_REEST_TO
;
2262 if (xprt
->reestablish_timeout
> XS_TCP_MAX_REEST_TO
)
2263 xprt
->reestablish_timeout
= XS_TCP_MAX_REEST_TO
;
2265 dprintk("RPC: xs_connect scheduled xprt %p\n", xprt
);
2266 queue_delayed_work(rpciod_workqueue
,
2267 &transport
->connect_worker
, 0);
2272 * xs_local_print_stats - display AF_LOCAL socket-specifc stats
2273 * @xprt: rpc_xprt struct containing statistics
2277 static void xs_local_print_stats(struct rpc_xprt
*xprt
, struct seq_file
*seq
)
2281 if (xprt_connected(xprt
))
2282 idle_time
= (long)(jiffies
- xprt
->last_used
) / HZ
;
2284 seq_printf(seq
, "\txprt:\tlocal %lu %lu %lu %ld %lu %lu %lu "
2285 "%llu %llu %lu %llu %llu\n",
2286 xprt
->stat
.bind_count
,
2287 xprt
->stat
.connect_count
,
2288 xprt
->stat
.connect_time
,
2292 xprt
->stat
.bad_xids
,
2295 xprt
->stat
.max_slots
,
2296 xprt
->stat
.sending_u
,
2297 xprt
->stat
.pending_u
);
2301 * xs_udp_print_stats - display UDP socket-specifc stats
2302 * @xprt: rpc_xprt struct containing statistics
2306 static void xs_udp_print_stats(struct rpc_xprt
*xprt
, struct seq_file
*seq
)
2308 struct sock_xprt
*transport
= container_of(xprt
, struct sock_xprt
, xprt
);
2310 seq_printf(seq
, "\txprt:\tudp %u %lu %lu %lu %lu %llu %llu "
2313 xprt
->stat
.bind_count
,
2316 xprt
->stat
.bad_xids
,
2319 xprt
->stat
.max_slots
,
2320 xprt
->stat
.sending_u
,
2321 xprt
->stat
.pending_u
);
2325 * xs_tcp_print_stats - display TCP socket-specifc stats
2326 * @xprt: rpc_xprt struct containing statistics
2330 static void xs_tcp_print_stats(struct rpc_xprt
*xprt
, struct seq_file
*seq
)
2332 struct sock_xprt
*transport
= container_of(xprt
, struct sock_xprt
, xprt
);
2335 if (xprt_connected(xprt
))
2336 idle_time
= (long)(jiffies
- xprt
->last_used
) / HZ
;
2338 seq_printf(seq
, "\txprt:\ttcp %u %lu %lu %lu %ld %lu %lu %lu "
2339 "%llu %llu %lu %llu %llu\n",
2341 xprt
->stat
.bind_count
,
2342 xprt
->stat
.connect_count
,
2343 xprt
->stat
.connect_time
,
2347 xprt
->stat
.bad_xids
,
2350 xprt
->stat
.max_slots
,
2351 xprt
->stat
.sending_u
,
2352 xprt
->stat
.pending_u
);
2356 * Allocate a bunch of pages for a scratch buffer for the rpc code. The reason
2357 * we allocate pages instead doing a kmalloc like rpc_malloc is because we want
2358 * to use the server side send routines.
2360 static void *bc_malloc(struct rpc_task
*task
, size_t size
)
2363 struct rpc_buffer
*buf
;
2365 WARN_ON_ONCE(size
> PAGE_SIZE
- sizeof(struct rpc_buffer
));
2366 if (size
> PAGE_SIZE
- sizeof(struct rpc_buffer
))
2369 page
= alloc_page(GFP_KERNEL
);
2373 buf
= page_address(page
);
2374 buf
->len
= PAGE_SIZE
;
2380 * Free the space allocated in the bc_alloc routine
2382 static void bc_free(void *buffer
)
2384 struct rpc_buffer
*buf
;
2389 buf
= container_of(buffer
, struct rpc_buffer
, data
);
2390 free_page((unsigned long)buf
);
2394 * Use the svc_sock to send the callback. Must be called with svsk->sk_mutex
2395 * held. Borrows heavily from svc_tcp_sendto and xs_tcp_send_request.
2397 static int bc_sendto(struct rpc_rqst
*req
)
2400 struct xdr_buf
*xbufp
= &req
->rq_snd_buf
;
2401 struct rpc_xprt
*xprt
= req
->rq_xprt
;
2402 struct sock_xprt
*transport
=
2403 container_of(xprt
, struct sock_xprt
, xprt
);
2404 struct socket
*sock
= transport
->sock
;
2405 unsigned long headoff
;
2406 unsigned long tailoff
;
2408 xs_encode_stream_record_marker(xbufp
);
2410 tailoff
= (unsigned long)xbufp
->tail
[0].iov_base
& ~PAGE_MASK
;
2411 headoff
= (unsigned long)xbufp
->head
[0].iov_base
& ~PAGE_MASK
;
2412 len
= svc_send_common(sock
, xbufp
,
2413 virt_to_page(xbufp
->head
[0].iov_base
), headoff
,
2414 xbufp
->tail
[0].iov_base
, tailoff
);
2416 if (len
!= xbufp
->len
) {
2417 printk(KERN_NOTICE
"Error sending entire callback!\n");
2425 * The send routine. Borrows from svc_send
2427 static int bc_send_request(struct rpc_task
*task
)
2429 struct rpc_rqst
*req
= task
->tk_rqstp
;
2430 struct svc_xprt
*xprt
;
2433 dprintk("sending request with xid: %08x\n", ntohl(req
->rq_xid
));
2435 * Get the server socket associated with this callback xprt
2437 xprt
= req
->rq_xprt
->bc_xprt
;
2440 * Grab the mutex to serialize data as the connection is shared
2441 * with the fore channel
2443 if (!mutex_trylock(&xprt
->xpt_mutex
)) {
2444 rpc_sleep_on(&xprt
->xpt_bc_pending
, task
, NULL
);
2445 if (!mutex_trylock(&xprt
->xpt_mutex
))
2447 rpc_wake_up_queued_task(&xprt
->xpt_bc_pending
, task
);
2449 if (test_bit(XPT_DEAD
, &xprt
->xpt_flags
))
2452 len
= bc_sendto(req
);
2453 mutex_unlock(&xprt
->xpt_mutex
);
2462 * The close routine. Since this is client initiated, we do nothing
2465 static void bc_close(struct rpc_xprt
*xprt
)
2470 * The xprt destroy routine. Again, because this connection is client
2471 * initiated, we do nothing
2474 static void bc_destroy(struct rpc_xprt
*xprt
)
2478 static struct rpc_xprt_ops xs_local_ops
= {
2479 .reserve_xprt
= xprt_reserve_xprt
,
2480 .release_xprt
= xs_tcp_release_xprt
,
2481 .alloc_slot
= xprt_alloc_slot
,
2482 .rpcbind
= xs_local_rpcbind
,
2483 .set_port
= xs_local_set_port
,
2484 .connect
= xs_local_connect
,
2485 .buf_alloc
= rpc_malloc
,
2486 .buf_free
= rpc_free
,
2487 .send_request
= xs_local_send_request
,
2488 .set_retrans_timeout
= xprt_set_retrans_timeout_def
,
2490 .destroy
= xs_local_destroy
,
2491 .print_stats
= xs_local_print_stats
,
2494 static struct rpc_xprt_ops xs_udp_ops
= {
2495 .set_buffer_size
= xs_udp_set_buffer_size
,
2496 .reserve_xprt
= xprt_reserve_xprt_cong
,
2497 .release_xprt
= xprt_release_xprt_cong
,
2498 .alloc_slot
= xprt_alloc_slot
,
2499 .rpcbind
= rpcb_getport_async
,
2500 .set_port
= xs_set_port
,
2501 .connect
= xs_connect
,
2502 .buf_alloc
= rpc_malloc
,
2503 .buf_free
= rpc_free
,
2504 .send_request
= xs_udp_send_request
,
2505 .set_retrans_timeout
= xprt_set_retrans_timeout_rtt
,
2506 .timer
= xs_udp_timer
,
2507 .release_request
= xprt_release_rqst_cong
,
2509 .destroy
= xs_destroy
,
2510 .print_stats
= xs_udp_print_stats
,
2513 static struct rpc_xprt_ops xs_tcp_ops
= {
2514 .reserve_xprt
= xprt_reserve_xprt
,
2515 .release_xprt
= xs_tcp_release_xprt
,
2516 .alloc_slot
= xprt_lock_and_alloc_slot
,
2517 .rpcbind
= rpcb_getport_async
,
2518 .set_port
= xs_set_port
,
2519 .connect
= xs_connect
,
2520 .buf_alloc
= rpc_malloc
,
2521 .buf_free
= rpc_free
,
2522 .send_request
= xs_tcp_send_request
,
2523 .set_retrans_timeout
= xprt_set_retrans_timeout_def
,
2524 .close
= xs_tcp_close
,
2525 .destroy
= xs_destroy
,
2526 .print_stats
= xs_tcp_print_stats
,
2530 * The rpc_xprt_ops for the server backchannel
2533 static struct rpc_xprt_ops bc_tcp_ops
= {
2534 .reserve_xprt
= xprt_reserve_xprt
,
2535 .release_xprt
= xprt_release_xprt
,
2536 .alloc_slot
= xprt_alloc_slot
,
2537 .buf_alloc
= bc_malloc
,
2538 .buf_free
= bc_free
,
2539 .send_request
= bc_send_request
,
2540 .set_retrans_timeout
= xprt_set_retrans_timeout_def
,
2542 .destroy
= bc_destroy
,
2543 .print_stats
= xs_tcp_print_stats
,
2546 static int xs_init_anyaddr(const int family
, struct sockaddr
*sap
)
2548 static const struct sockaddr_in sin
= {
2549 .sin_family
= AF_INET
,
2550 .sin_addr
.s_addr
= htonl(INADDR_ANY
),
2552 static const struct sockaddr_in6 sin6
= {
2553 .sin6_family
= AF_INET6
,
2554 .sin6_addr
= IN6ADDR_ANY_INIT
,
2561 memcpy(sap
, &sin
, sizeof(sin
));
2564 memcpy(sap
, &sin6
, sizeof(sin6
));
2567 dprintk("RPC: %s: Bad address family\n", __func__
);
2568 return -EAFNOSUPPORT
;
2573 static struct rpc_xprt
*xs_setup_xprt(struct xprt_create
*args
,
2574 unsigned int slot_table_size
,
2575 unsigned int max_slot_table_size
)
2577 struct rpc_xprt
*xprt
;
2578 struct sock_xprt
*new;
2580 if (args
->addrlen
> sizeof(xprt
->addr
)) {
2581 dprintk("RPC: xs_setup_xprt: address too large\n");
2582 return ERR_PTR(-EBADF
);
2585 xprt
= xprt_alloc(args
->net
, sizeof(*new), slot_table_size
,
2586 max_slot_table_size
);
2588 dprintk("RPC: xs_setup_xprt: couldn't allocate "
2590 return ERR_PTR(-ENOMEM
);
2593 new = container_of(xprt
, struct sock_xprt
, xprt
);
2594 memcpy(&xprt
->addr
, args
->dstaddr
, args
->addrlen
);
2595 xprt
->addrlen
= args
->addrlen
;
2597 memcpy(&new->srcaddr
, args
->srcaddr
, args
->addrlen
);
2600 err
= xs_init_anyaddr(args
->dstaddr
->sa_family
,
2601 (struct sockaddr
*)&new->srcaddr
);
2604 return ERR_PTR(err
);
2611 static const struct rpc_timeout xs_local_default_timeout
= {
2612 .to_initval
= 10 * HZ
,
2613 .to_maxval
= 10 * HZ
,
2618 * xs_setup_local - Set up transport to use an AF_LOCAL socket
2619 * @args: rpc transport creation arguments
2621 * AF_LOCAL is a "tpi_cots_ord" transport, just like TCP
2623 static struct rpc_xprt
*xs_setup_local(struct xprt_create
*args
)
2625 struct sockaddr_un
*sun
= (struct sockaddr_un
*)args
->dstaddr
;
2626 struct sock_xprt
*transport
;
2627 struct rpc_xprt
*xprt
;
2628 struct rpc_xprt
*ret
;
2630 xprt
= xs_setup_xprt(args
, xprt_tcp_slot_table_entries
,
2631 xprt_max_tcp_slot_table_entries
);
2634 transport
= container_of(xprt
, struct sock_xprt
, xprt
);
2637 xprt
->tsh_size
= sizeof(rpc_fraghdr
) / sizeof(u32
);
2638 xprt
->max_payload
= RPC_MAX_FRAGMENT_SIZE
;
2640 xprt
->bind_timeout
= XS_BIND_TO
;
2641 xprt
->reestablish_timeout
= XS_TCP_INIT_REEST_TO
;
2642 xprt
->idle_timeout
= XS_IDLE_DISC_TO
;
2644 xprt
->ops
= &xs_local_ops
;
2645 xprt
->timeout
= &xs_local_default_timeout
;
2647 switch (sun
->sun_family
) {
2649 if (sun
->sun_path
[0] != '/') {
2650 dprintk("RPC: bad AF_LOCAL address: %s\n",
2652 ret
= ERR_PTR(-EINVAL
);
2655 xprt_set_bound(xprt
);
2656 xs_format_peer_addresses(xprt
, "local", RPCBIND_NETID_LOCAL
);
2657 ret
= ERR_PTR(xs_local_setup_socket(transport
));
2662 ret
= ERR_PTR(-EAFNOSUPPORT
);
2666 dprintk("RPC: set up xprt to %s via AF_LOCAL\n",
2667 xprt
->address_strings
[RPC_DISPLAY_ADDR
]);
2669 if (try_module_get(THIS_MODULE
))
2671 ret
= ERR_PTR(-EINVAL
);
2677 static const struct rpc_timeout xs_udp_default_timeout
= {
2678 .to_initval
= 5 * HZ
,
2679 .to_maxval
= 30 * HZ
,
2680 .to_increment
= 5 * HZ
,
2685 * xs_setup_udp - Set up transport to use a UDP socket
2686 * @args: rpc transport creation arguments
2689 static struct rpc_xprt
*xs_setup_udp(struct xprt_create
*args
)
2691 struct sockaddr
*addr
= args
->dstaddr
;
2692 struct rpc_xprt
*xprt
;
2693 struct sock_xprt
*transport
;
2694 struct rpc_xprt
*ret
;
2696 xprt
= xs_setup_xprt(args
, xprt_udp_slot_table_entries
,
2697 xprt_udp_slot_table_entries
);
2700 transport
= container_of(xprt
, struct sock_xprt
, xprt
);
2702 xprt
->prot
= IPPROTO_UDP
;
2704 /* XXX: header size can vary due to auth type, IPv6, etc. */
2705 xprt
->max_payload
= (1U << 16) - (MAX_HEADER
<< 3);
2707 xprt
->bind_timeout
= XS_BIND_TO
;
2708 xprt
->reestablish_timeout
= XS_UDP_REEST_TO
;
2709 xprt
->idle_timeout
= XS_IDLE_DISC_TO
;
2711 xprt
->ops
= &xs_udp_ops
;
2713 xprt
->timeout
= &xs_udp_default_timeout
;
2715 switch (addr
->sa_family
) {
2717 if (((struct sockaddr_in
*)addr
)->sin_port
!= htons(0))
2718 xprt_set_bound(xprt
);
2720 INIT_DELAYED_WORK(&transport
->connect_worker
,
2721 xs_udp_setup_socket
);
2722 xs_format_peer_addresses(xprt
, "udp", RPCBIND_NETID_UDP
);
2725 if (((struct sockaddr_in6
*)addr
)->sin6_port
!= htons(0))
2726 xprt_set_bound(xprt
);
2728 INIT_DELAYED_WORK(&transport
->connect_worker
,
2729 xs_udp_setup_socket
);
2730 xs_format_peer_addresses(xprt
, "udp", RPCBIND_NETID_UDP6
);
2733 ret
= ERR_PTR(-EAFNOSUPPORT
);
2737 if (xprt_bound(xprt
))
2738 dprintk("RPC: set up xprt to %s (port %s) via %s\n",
2739 xprt
->address_strings
[RPC_DISPLAY_ADDR
],
2740 xprt
->address_strings
[RPC_DISPLAY_PORT
],
2741 xprt
->address_strings
[RPC_DISPLAY_PROTO
]);
2743 dprintk("RPC: set up xprt to %s (autobind) via %s\n",
2744 xprt
->address_strings
[RPC_DISPLAY_ADDR
],
2745 xprt
->address_strings
[RPC_DISPLAY_PROTO
]);
2747 if (try_module_get(THIS_MODULE
))
2749 ret
= ERR_PTR(-EINVAL
);
2755 static const struct rpc_timeout xs_tcp_default_timeout
= {
2756 .to_initval
= 60 * HZ
,
2757 .to_maxval
= 60 * HZ
,
2762 * xs_setup_tcp - Set up transport to use a TCP socket
2763 * @args: rpc transport creation arguments
2766 static struct rpc_xprt
*xs_setup_tcp(struct xprt_create
*args
)
2768 struct sockaddr
*addr
= args
->dstaddr
;
2769 struct rpc_xprt
*xprt
;
2770 struct sock_xprt
*transport
;
2771 struct rpc_xprt
*ret
;
2772 unsigned int max_slot_table_size
= xprt_max_tcp_slot_table_entries
;
2774 if (args
->flags
& XPRT_CREATE_INFINITE_SLOTS
)
2775 max_slot_table_size
= RPC_MAX_SLOT_TABLE_LIMIT
;
2777 xprt
= xs_setup_xprt(args
, xprt_tcp_slot_table_entries
,
2778 max_slot_table_size
);
2781 transport
= container_of(xprt
, struct sock_xprt
, xprt
);
2783 xprt
->prot
= IPPROTO_TCP
;
2784 xprt
->tsh_size
= sizeof(rpc_fraghdr
) / sizeof(u32
);
2785 xprt
->max_payload
= RPC_MAX_FRAGMENT_SIZE
;
2787 xprt
->bind_timeout
= XS_BIND_TO
;
2788 xprt
->reestablish_timeout
= XS_TCP_INIT_REEST_TO
;
2789 xprt
->idle_timeout
= XS_IDLE_DISC_TO
;
2791 xprt
->ops
= &xs_tcp_ops
;
2792 xprt
->timeout
= &xs_tcp_default_timeout
;
2794 switch (addr
->sa_family
) {
2796 if (((struct sockaddr_in
*)addr
)->sin_port
!= htons(0))
2797 xprt_set_bound(xprt
);
2799 INIT_DELAYED_WORK(&transport
->connect_worker
,
2800 xs_tcp_setup_socket
);
2801 xs_format_peer_addresses(xprt
, "tcp", RPCBIND_NETID_TCP
);
2804 if (((struct sockaddr_in6
*)addr
)->sin6_port
!= htons(0))
2805 xprt_set_bound(xprt
);
2807 INIT_DELAYED_WORK(&transport
->connect_worker
,
2808 xs_tcp_setup_socket
);
2809 xs_format_peer_addresses(xprt
, "tcp", RPCBIND_NETID_TCP6
);
2812 ret
= ERR_PTR(-EAFNOSUPPORT
);
2816 if (xprt_bound(xprt
))
2817 dprintk("RPC: set up xprt to %s (port %s) via %s\n",
2818 xprt
->address_strings
[RPC_DISPLAY_ADDR
],
2819 xprt
->address_strings
[RPC_DISPLAY_PORT
],
2820 xprt
->address_strings
[RPC_DISPLAY_PROTO
]);
2822 dprintk("RPC: set up xprt to %s (autobind) via %s\n",
2823 xprt
->address_strings
[RPC_DISPLAY_ADDR
],
2824 xprt
->address_strings
[RPC_DISPLAY_PROTO
]);
2827 if (try_module_get(THIS_MODULE
))
2829 ret
= ERR_PTR(-EINVAL
);
2836 * xs_setup_bc_tcp - Set up transport to use a TCP backchannel socket
2837 * @args: rpc transport creation arguments
2840 static struct rpc_xprt
*xs_setup_bc_tcp(struct xprt_create
*args
)
2842 struct sockaddr
*addr
= args
->dstaddr
;
2843 struct rpc_xprt
*xprt
;
2844 struct sock_xprt
*transport
;
2845 struct svc_sock
*bc_sock
;
2846 struct rpc_xprt
*ret
;
2848 if (args
->bc_xprt
->xpt_bc_xprt
) {
2850 * This server connection already has a backchannel
2851 * export; we can't create a new one, as we wouldn't be
2852 * able to match replies based on xid any more. So,
2853 * reuse the already-existing one:
2855 return args
->bc_xprt
->xpt_bc_xprt
;
2857 xprt
= xs_setup_xprt(args
, xprt_tcp_slot_table_entries
,
2858 xprt_tcp_slot_table_entries
);
2861 transport
= container_of(xprt
, struct sock_xprt
, xprt
);
2863 xprt
->prot
= IPPROTO_TCP
;
2864 xprt
->tsh_size
= sizeof(rpc_fraghdr
) / sizeof(u32
);
2865 xprt
->max_payload
= RPC_MAX_FRAGMENT_SIZE
;
2866 xprt
->timeout
= &xs_tcp_default_timeout
;
2869 xprt_set_bound(xprt
);
2870 xprt
->bind_timeout
= 0;
2871 xprt
->reestablish_timeout
= 0;
2872 xprt
->idle_timeout
= 0;
2874 xprt
->ops
= &bc_tcp_ops
;
2876 switch (addr
->sa_family
) {
2878 xs_format_peer_addresses(xprt
, "tcp",
2882 xs_format_peer_addresses(xprt
, "tcp",
2883 RPCBIND_NETID_TCP6
);
2886 ret
= ERR_PTR(-EAFNOSUPPORT
);
2890 dprintk("RPC: set up xprt to %s (port %s) via %s\n",
2891 xprt
->address_strings
[RPC_DISPLAY_ADDR
],
2892 xprt
->address_strings
[RPC_DISPLAY_PORT
],
2893 xprt
->address_strings
[RPC_DISPLAY_PROTO
]);
2896 * Once we've associated a backchannel xprt with a connection,
2897 * we want to keep it around as long as long as the connection
2898 * lasts, in case we need to start using it for a backchannel
2899 * again; this reference won't be dropped until bc_xprt is
2903 args
->bc_xprt
->xpt_bc_xprt
= xprt
;
2904 xprt
->bc_xprt
= args
->bc_xprt
;
2905 bc_sock
= container_of(args
->bc_xprt
, struct svc_sock
, sk_xprt
);
2906 transport
->sock
= bc_sock
->sk_sock
;
2907 transport
->inet
= bc_sock
->sk_sk
;
2910 * Since we don't want connections for the backchannel, we set
2911 * the xprt status to connected
2913 xprt_set_connected(xprt
);
2916 if (try_module_get(THIS_MODULE
))
2919 ret
= ERR_PTR(-EINVAL
);
2925 static struct xprt_class xs_local_transport
= {
2926 .list
= LIST_HEAD_INIT(xs_local_transport
.list
),
2927 .name
= "named UNIX socket",
2928 .owner
= THIS_MODULE
,
2929 .ident
= XPRT_TRANSPORT_LOCAL
,
2930 .setup
= xs_setup_local
,
2933 static struct xprt_class xs_udp_transport
= {
2934 .list
= LIST_HEAD_INIT(xs_udp_transport
.list
),
2936 .owner
= THIS_MODULE
,
2937 .ident
= XPRT_TRANSPORT_UDP
,
2938 .setup
= xs_setup_udp
,
2941 static struct xprt_class xs_tcp_transport
= {
2942 .list
= LIST_HEAD_INIT(xs_tcp_transport
.list
),
2944 .owner
= THIS_MODULE
,
2945 .ident
= XPRT_TRANSPORT_TCP
,
2946 .setup
= xs_setup_tcp
,
2949 static struct xprt_class xs_bc_tcp_transport
= {
2950 .list
= LIST_HEAD_INIT(xs_bc_tcp_transport
.list
),
2951 .name
= "tcp NFSv4.1 backchannel",
2952 .owner
= THIS_MODULE
,
2953 .ident
= XPRT_TRANSPORT_BC_TCP
,
2954 .setup
= xs_setup_bc_tcp
,
2958 * init_socket_xprt - set up xprtsock's sysctls, register with RPC client
2961 int init_socket_xprt(void)
2964 if (!sunrpc_table_header
)
2965 sunrpc_table_header
= register_sysctl_table(sunrpc_table
);
2968 xprt_register_transport(&xs_local_transport
);
2969 xprt_register_transport(&xs_udp_transport
);
2970 xprt_register_transport(&xs_tcp_transport
);
2971 xprt_register_transport(&xs_bc_tcp_transport
);
2977 * cleanup_socket_xprt - remove xprtsock's sysctls, unregister
2980 void cleanup_socket_xprt(void)
2983 if (sunrpc_table_header
) {
2984 unregister_sysctl_table(sunrpc_table_header
);
2985 sunrpc_table_header
= NULL
;
2989 xprt_unregister_transport(&xs_local_transport
);
2990 xprt_unregister_transport(&xs_udp_transport
);
2991 xprt_unregister_transport(&xs_tcp_transport
);
2992 xprt_unregister_transport(&xs_bc_tcp_transport
);
2995 static int param_set_uint_minmax(const char *val
,
2996 const struct kernel_param
*kp
,
2997 unsigned int min
, unsigned int max
)
3004 ret
= strict_strtoul(val
, 0, &num
);
3005 if (ret
== -EINVAL
|| num
< min
|| num
> max
)
3007 *((unsigned int *)kp
->arg
) = num
;
3011 static int param_set_portnr(const char *val
, const struct kernel_param
*kp
)
3013 return param_set_uint_minmax(val
, kp
,
3018 static struct kernel_param_ops param_ops_portnr
= {
3019 .set
= param_set_portnr
,
3020 .get
= param_get_uint
,
3023 #define param_check_portnr(name, p) \
3024 __param_check(name, p, unsigned int);
3026 module_param_named(min_resvport
, xprt_min_resvport
, portnr
, 0644);
3027 module_param_named(max_resvport
, xprt_max_resvport
, portnr
, 0644);
3029 static int param_set_slot_table_size(const char *val
,
3030 const struct kernel_param
*kp
)
3032 return param_set_uint_minmax(val
, kp
,
3034 RPC_MAX_SLOT_TABLE
);
3037 static struct kernel_param_ops param_ops_slot_table_size
= {
3038 .set
= param_set_slot_table_size
,
3039 .get
= param_get_uint
,
3042 #define param_check_slot_table_size(name, p) \
3043 __param_check(name, p, unsigned int);
3045 static int param_set_max_slot_table_size(const char *val
,
3046 const struct kernel_param
*kp
)
3048 return param_set_uint_minmax(val
, kp
,
3050 RPC_MAX_SLOT_TABLE_LIMIT
);
3053 static struct kernel_param_ops param_ops_max_slot_table_size
= {
3054 .set
= param_set_max_slot_table_size
,
3055 .get
= param_get_uint
,
3058 #define param_check_max_slot_table_size(name, p) \
3059 __param_check(name, p, unsigned int);
3061 module_param_named(tcp_slot_table_entries
, xprt_tcp_slot_table_entries
,
3062 slot_table_size
, 0644);
3063 module_param_named(tcp_max_slot_table_entries
, xprt_max_tcp_slot_table_entries
,
3064 max_slot_table_size
, 0644);
3065 module_param_named(udp_slot_table_entries
, xprt_udp_slot_table_entries
,
3066 slot_table_size
, 0644);