usr/src/uts/common/rpc/mt_rpcinit.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   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  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
  27 /*        All Rights Reserved   */
  28
  29
  30 #pragma ident   "%Z%%M% %I%     %E% SMI"        /* SVr4.0 */
  31
  32 /*
  33  * Define and initialize MT client/server data.
  34  */
  35
  36 #include        <sys/types.h>
  37 #include        <sys/t_lock.h>
  38 #include        <sys/kstat.h>
  39 #include        <sys/systm.h>
  40 #include        <sys/zone.h>
  41
  42 #include        <rpc/types.h>
  43 #include        <rpc/auth.h>
  44 #include        <rpc/clnt.h>
  45
  46 kmutex_t xid_lock;              /* XID allocation */
  47 kmutex_t clnt_pending_lock;     /* for list of pending calls awaiting replies */
  48 kmutex_t clnt_max_msg_lock;     /* updating max message sanity check for cots */
  49
  50 zone_key_t      rpcstat_zone_key;
  51
  52 /*
  53  * rpcstat_zone_[init|fini]_common() ends up being nearly identical to
  54  * nfsstat_zone_[init|fini]_common().  Due to them necessarily being in
  55  * different modules, however, we end up needing to duplicate the code.
  56  */
  57 kstat_named_t *
  58 rpcstat_zone_init_common(zoneid_t zoneid, const char *module, const char *name,
  59     const kstat_named_t *template, size_t template_size)
  60 {
  61         kstat_t *ksp;
  62         kstat_named_t *ks_data;
  63
  64
  65 /*
  66  * PSARC 2001/697 Contract Private Interface
  67  * rpc_clts_client
  68  * rpc_cots_client
  69  * Changes must be reviewed by Solaris File Sharing
  70  * Changes must be communicated to contract-2001-697@sun.com
  71  *
  72  */
  73         ks_data = kmem_alloc(template_size, KM_SLEEP);
  74         bcopy(template, ks_data, template_size);
  75         if ((ksp = kstat_create_zone(module, 0, name, "rpc",
  76             KSTAT_TYPE_NAMED, template_size / sizeof (kstat_named_t),
  77             KSTAT_FLAG_VIRTUAL | KSTAT_FLAG_WRITABLE, zoneid)) != NULL) {
  78                 ksp->ks_data = ks_data;
  79                 kstat_install(ksp);
  80         }
  81         return (ks_data);
  82 }
  83
  84 void
  85 rpcstat_zone_fini_common(zoneid_t zoneid, const char *module, const char *name)
  86 {
  87         kstat_delete_byname_zone(module, 0, name, zoneid);
  88 }
  89
  90 static void *
  91 mt_kstat_zone_init(zoneid_t zoneid)
  92 {
  93         struct rpcstat *rpcstat;
  94
  95         rpcstat = kmem_alloc(sizeof (*rpcstat), KM_SLEEP);
  96
  97         clnt_clts_stats_init(zoneid, &rpcstat->rpc_clts_client);
  98         svc_clts_stats_init(zoneid, &rpcstat->rpc_clts_server);
  99
 100         clnt_cots_stats_init(zoneid, &rpcstat->rpc_cots_client);
 101         svc_cots_stats_init(zoneid, &rpcstat->rpc_cots_server);
 102
 103         return (rpcstat);
 104 }
 105
 106 /*
 107  * Deletes the previously allocated "rpc" kstats
 108  */
 109 static void
 110 mt_kstat_zone_fini(zoneid_t zoneid, void *data)
 111 {
 112         struct rpcstat *rpcstat = data;
 113
 114         clnt_cots_stats_fini(zoneid, &rpcstat->rpc_cots_client);
 115         svc_cots_stats_fini(zoneid, &rpcstat->rpc_cots_server);
 116
 117         clnt_clts_stats_fini(zoneid, &rpcstat->rpc_clts_client);
 118         svc_clts_stats_fini(zoneid, &rpcstat->rpc_clts_server);
 119
 120         kmem_free(rpcstat, sizeof (*rpcstat));
 121 }
 122
 123 void
 124 mt_kstat_init(void)
 125 {
 126         zone_key_create(&rpcstat_zone_key, mt_kstat_zone_init, NULL,
 127             mt_kstat_zone_fini);
 128 }
 129
 130 void
 131 mt_kstat_fini(void)
 132 {
 133         (void) zone_key_delete(rpcstat_zone_key);
 134 }
 135
 136 static bool_t   clnt_xid_initialized = FALSE;
 137 static uint32_t clnt_xid = 0;   /* transaction id used by all clients */
 138
 139 uint32_t
 140 alloc_xid(void)
 141 {
 142         uint32_t  xid;
 143         timestruc_t now;
 144
 145         /*
 146          * Do a one time initialzation to better utilize the number
 147          * space.
 148          */
 149         mutex_enter(&xid_lock);
 150         if (clnt_xid_initialized == FALSE) {
 151                 clnt_xid_initialized = TRUE;
 152                 gethrestime(&now);
 153                 clnt_xid = (uint32_t)((now.tv_sec << 20) |
 154                     (now.tv_nsec >> 10));
 155         }
 156
 157         xid = clnt_xid++;
 158
 159         /*
 160          * Don't return a zero xid.  This could happen if the initialization
 161          * happens to return zero or if clnt_xid wraps.
 162          */
 163         if (xid == 0)
 164                 xid = clnt_xid++;
 165
 166         mutex_exit(&xid_lock);
 167         return (xid);
 168 }
 169
 170 /*
 171  * These functions are temporary and designed for the upgrade-workaround only.
 172  * They cannot be used for general zone-crossing RPC client support, and will
 173  * be removed shortly.
 174  *
 175  * Currently these functions route all nfs global clients to the global zone.
 176  * When this upgrade-workaround is removed these function should return the
 177  * correct zone or their calls should be changed (rpc_zone() to curproc->p_zone
 178  * and rpc_zoneid() to getzoneid()).
 179  */
 180 struct zone *
 181 rpc_zone(void)
 182 {
 183         return (nfs_global_client_only != 0 ? global_zone : curproc->p_zone);
 184 }
 185
 186 zoneid_t
 187 rpc_zoneid(void)
 188 {
 189         return (nfs_global_client_only != 0 ? GLOBAL_ZONEID : getzoneid());
 190 }