6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2015 Nexenta Systems, Inc. All rights reserved.
24 * Copyright (c) 1989, 2010, Oracle and/or its affiliates. All rights reserved.
25 * Copyright (c) 2012 by Delphix. All rights reserved.
26 */
27
28 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
29 /* All Rights Reserved */
30
31 /*
32 * Portions of this source code were derived from Berkeley 4.3 BSD
33 * under license from the Regents of the University of California.
34 */
35
36 /*
37 * svc_clts.c
38 * Server side for RPC in the kernel.
39 *
40 */
41
42 #include <sys/param.h>
43 #include <sys/types.h>
44 #include <sys/sysmacros.h>
45 #include <sys/file.h>
84 static void svc_clts_kstart(SVCMASTERXPRT *);
85 static void svc_clts_kclone_xprt(SVCXPRT *, SVCXPRT *);
86 static void svc_clts_ktattrs(SVCXPRT *, int, void **);
87
88 /*
89 * Server transport operations vector.
90 */
91 struct svc_ops svc_clts_op = {
92 svc_clts_krecv, /* Get requests */
93 svc_clts_kgetargs, /* Deserialize arguments */
94 svc_clts_ksend, /* Send reply */
95 svc_clts_kfreeargs, /* Free argument data space */
96 svc_clts_kdestroy, /* Destroy transport handle */
97 svc_clts_kdup, /* Check entry in dup req cache */
98 svc_clts_kdupdone, /* Mark entry in dup req cache as done */
99 svc_clts_kgetres, /* Get pointer to response buffer */
100 svc_clts_kfreeres, /* Destroy pre-serialized response header */
101 svc_clts_kclone_destroy, /* Destroy a clone xprt */
102 svc_clts_kstart, /* Tell `ready-to-receive' to rpcmod */
103 svc_clts_kclone_xprt, /* transport specific clone xprt function */
104 svc_clts_ktattrs /* Transport specific attributes. */
105 };
106
107 /*
108 * Transport private data.
109 * Kept in xprt->xp_p2buf.
110 */
111 struct udp_data {
112 mblk_t *ud_resp; /* buffer for response */
113 mblk_t *ud_inmp; /* mblk chain of request */
114 };
115
116 #define UD_MAXSIZE 8800
117 #define UD_INITSIZE 2048
118
119 /*
120 * Connectionless server statistics
121 */
122 static const struct rpc_clts_server {
123 kstat_named_t rscalls;
124 kstat_named_t rsbadcalls;
125 kstat_named_t rsnullrecv;
126 kstat_named_t rsbadlen;
127 kstat_named_t rsxdrcall;
128 kstat_named_t rsdupchecks;
129 kstat_named_t rsdupreqs;
130 } clts_rsstat_tmpl = {
131 { "calls", KSTAT_DATA_UINT64 },
132 { "badcalls", KSTAT_DATA_UINT64 },
133 { "nullrecv", KSTAT_DATA_UINT64 },
307 pptr->unitdata_ind.OPT_length) ||
308 hdrsz < (pptr->unitdata_ind.SRC_offset +
309 pptr->unitdata_ind.SRC_length)) {
310 goto bad;
311 }
312
313 /*
314 * Make sure that the transport provided a usable address.
315 */
316 if (pptr->unitdata_ind.SRC_length <= 0) {
317 goto bad;
318 }
319 /*
320 * Point the remote transport address in the service_transport
321 * handle at the address in the request.
322 */
323 clone_xprt->xp_rtaddr.buf = (char *)mp->b_rptr +
324 pptr->unitdata_ind.SRC_offset;
325 clone_xprt->xp_rtaddr.len = pptr->unitdata_ind.SRC_length;
326
327 /*
328 * Copy the local transport address in the service_transport
329 * handle at the address in the request. We will have only
330 * the local IP address in options.
331 */
332 ((sin_t *)(clone_xprt->xp_lcladdr.buf))->sin_family = AF_UNSPEC;
333 if (pptr->unitdata_ind.OPT_length && pptr->unitdata_ind.OPT_offset) {
334 char *dstopt = (char *)mp->b_rptr +
335 pptr->unitdata_ind.OPT_offset;
336 struct T_opthdr *toh = (struct T_opthdr *)dstopt;
337
338 if (toh->level == IPPROTO_IPV6 && toh->status == 0 &&
339 toh->name == IPV6_PKTINFO) {
340 struct in6_pktinfo *pkti;
341
342 dstopt += sizeof (struct T_opthdr);
343 pkti = (struct in6_pktinfo *)dstopt;
344 ((sin6_t *)(clone_xprt->xp_lcladdr.buf))->sin6_addr
345 = pkti->ipi6_addr;
346 ((sin6_t *)(clone_xprt->xp_lcladdr.buf))->sin6_family
744 */
745
746 /*
747 * MAXDUPREQS is the number of cached items. It should be adjusted
748 * to the service load so that there is likely to be a response entry
749 * when the first retransmission comes in.
750 */
751 #define MAXDUPREQS 8192
752
753 /*
754 * This should be appropriately scaled to MAXDUPREQS. To produce as less as
755 * possible collisions it is suggested to set this to a prime.
756 */
757 #define DRHASHSZ 2053
758
759 #define XIDHASH(xid) ((xid) % DRHASHSZ)
760 #define DRHASH(dr) XIDHASH((dr)->dr_xid)
761 #define REQTOXID(req) ((req)->rq_xprt->xp_xid)
762
763 static int ndupreqs = 0;
764 int maxdupreqs = MAXDUPREQS;
765 static kmutex_t dupreq_lock;
766 static struct dupreq *drhashtbl[DRHASHSZ];
767 static int drhashstat[DRHASHSZ];
768
769 static void unhash(struct dupreq *);
770
771 /*
772 * drmru points to the head of a circular linked list in lru order.
773 * drmru->dr_next == drlru
774 */
775 struct dupreq *drmru;
776
777 /*
778 * PSARC 2003/523 Contract Private Interface
779 * svc_clts_kdup
780 * Changes must be reviewed by Solaris File Sharing
781 * Changes must be communicated to contract-2003-523@sun.com
782 *
783 * svc_clts_kdup searches the request cache and returns 0 if the
784 * request is not found in the cache. If it is found, then it
|
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2015 Nexenta Systems, Inc. All rights reserved.
24 * Copyright (c) 1989, 2010, Oracle and/or its affiliates. All rights reserved.
25 * Copyright (c) 2012 by Delphix. All rights reserved.
26 * Copyright 2012 Marcel Telka <marcel@telka.sk>
27 * Copyright 2018 OmniOS Community Edition (OmniOSce) Association.
28 */
29
30 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
31 /* All Rights Reserved */
32
33 /*
34 * Portions of this source code were derived from Berkeley 4.3 BSD
35 * under license from the Regents of the University of California.
36 */
37
38 /*
39 * svc_clts.c
40 * Server side for RPC in the kernel.
41 *
42 */
43
44 #include <sys/param.h>
45 #include <sys/types.h>
46 #include <sys/sysmacros.h>
47 #include <sys/file.h>
86 static void svc_clts_kstart(SVCMASTERXPRT *);
87 static void svc_clts_kclone_xprt(SVCXPRT *, SVCXPRT *);
88 static void svc_clts_ktattrs(SVCXPRT *, int, void **);
89
90 /*
91 * Server transport operations vector.
92 */
93 struct svc_ops svc_clts_op = {
94 svc_clts_krecv, /* Get requests */
95 svc_clts_kgetargs, /* Deserialize arguments */
96 svc_clts_ksend, /* Send reply */
97 svc_clts_kfreeargs, /* Free argument data space */
98 svc_clts_kdestroy, /* Destroy transport handle */
99 svc_clts_kdup, /* Check entry in dup req cache */
100 svc_clts_kdupdone, /* Mark entry in dup req cache as done */
101 svc_clts_kgetres, /* Get pointer to response buffer */
102 svc_clts_kfreeres, /* Destroy pre-serialized response header */
103 svc_clts_kclone_destroy, /* Destroy a clone xprt */
104 svc_clts_kstart, /* Tell `ready-to-receive' to rpcmod */
105 svc_clts_kclone_xprt, /* transport specific clone xprt function */
106 svc_clts_ktattrs, /* Transport specific attributes */
107 rpcmod_hold, /* Increment transport reference count */
108 rpcmod_release /* Decrement transport reference count */
109 };
110
111 /*
112 * Transport private data.
113 * Kept in xprt->xp_p2buf.
114 */
115 struct udp_data {
116 mblk_t *ud_resp; /* buffer for response */
117 mblk_t *ud_inmp; /* mblk chain of request */
118 sin6_t ud_local; /* local address */
119 };
120
121 #define UD_MAXSIZE 8800
122 #define UD_INITSIZE 2048
123
124 /*
125 * Connectionless server statistics
126 */
127 static const struct rpc_clts_server {
128 kstat_named_t rscalls;
129 kstat_named_t rsbadcalls;
130 kstat_named_t rsnullrecv;
131 kstat_named_t rsbadlen;
132 kstat_named_t rsxdrcall;
133 kstat_named_t rsdupchecks;
134 kstat_named_t rsdupreqs;
135 } clts_rsstat_tmpl = {
136 { "calls", KSTAT_DATA_UINT64 },
137 { "badcalls", KSTAT_DATA_UINT64 },
138 { "nullrecv", KSTAT_DATA_UINT64 },
312 pptr->unitdata_ind.OPT_length) ||
313 hdrsz < (pptr->unitdata_ind.SRC_offset +
314 pptr->unitdata_ind.SRC_length)) {
315 goto bad;
316 }
317
318 /*
319 * Make sure that the transport provided a usable address.
320 */
321 if (pptr->unitdata_ind.SRC_length <= 0) {
322 goto bad;
323 }
324 /*
325 * Point the remote transport address in the service_transport
326 * handle at the address in the request.
327 */
328 clone_xprt->xp_rtaddr.buf = (char *)mp->b_rptr +
329 pptr->unitdata_ind.SRC_offset;
330 clone_xprt->xp_rtaddr.len = pptr->unitdata_ind.SRC_length;
331
332 clone_xprt->xp_lcladdr.buf = (char *)&ud->ud_local;
333
334 /*
335 * Copy the local transport address in the service_transport
336 * handle at the address in the request. We will have only
337 * the local IP address in options.
338 */
339 ((sin_t *)(clone_xprt->xp_lcladdr.buf))->sin_family = AF_UNSPEC;
340 if (pptr->unitdata_ind.OPT_length && pptr->unitdata_ind.OPT_offset) {
341 char *dstopt = (char *)mp->b_rptr +
342 pptr->unitdata_ind.OPT_offset;
343 struct T_opthdr *toh = (struct T_opthdr *)dstopt;
344
345 if (toh->level == IPPROTO_IPV6 && toh->status == 0 &&
346 toh->name == IPV6_PKTINFO) {
347 struct in6_pktinfo *pkti;
348
349 dstopt += sizeof (struct T_opthdr);
350 pkti = (struct in6_pktinfo *)dstopt;
351 ((sin6_t *)(clone_xprt->xp_lcladdr.buf))->sin6_addr
352 = pkti->ipi6_addr;
353 ((sin6_t *)(clone_xprt->xp_lcladdr.buf))->sin6_family
751 */
752
753 /*
754 * MAXDUPREQS is the number of cached items. It should be adjusted
755 * to the service load so that there is likely to be a response entry
756 * when the first retransmission comes in.
757 */
758 #define MAXDUPREQS 8192
759
760 /*
761 * This should be appropriately scaled to MAXDUPREQS. To produce as less as
762 * possible collisions it is suggested to set this to a prime.
763 */
764 #define DRHASHSZ 2053
765
766 #define XIDHASH(xid) ((xid) % DRHASHSZ)
767 #define DRHASH(dr) XIDHASH((dr)->dr_xid)
768 #define REQTOXID(req) ((req)->rq_xprt->xp_xid)
769
770 static int ndupreqs = 0;
771 volatile int maxdupreqs = MAXDUPREQS;
772 static kmutex_t dupreq_lock;
773 static struct dupreq *drhashtbl[DRHASHSZ];
774 static int drhashstat[DRHASHSZ];
775
776 static void unhash(struct dupreq *);
777
778 /*
779 * drmru points to the head of a circular linked list in lru order.
780 * drmru->dr_next == drlru
781 */
782 struct dupreq *drmru;
783
784 /*
785 * PSARC 2003/523 Contract Private Interface
786 * svc_clts_kdup
787 * Changes must be reviewed by Solaris File Sharing
788 * Changes must be communicated to contract-2003-523@sun.com
789 *
790 * svc_clts_kdup searches the request cache and returns 0 if the
791 * request is not found in the cache. If it is found, then it
|