svc_run.c revision 1.27.2.1
1 /* $NetBSD: svc_run.c,v 1.27.2.1 2017/03/20 06:56:58 pgoyette Exp $ */ 2 3 /* 4 * Copyright (c) 2010, Oracle America, Inc. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are 8 * met: 9 * 10 * * Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * * Redistributions in binary form must reproduce the above 13 * copyright notice, this list of conditions and the following 14 * disclaimer in the documentation and/or other materials 15 * provided with the distribution. 16 * * Neither the name of the "Oracle America, Inc." nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 24 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 25 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 27 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 #if defined(LIBC_SCCS) && !defined(lint) 36 #if 0 37 static char *sccsid = "@(#)svc_run.c 1.1 87/10/13 Copyr 1984 Sun Micro"; 38 static char *sccsid = "@(#)svc_run.c 2.1 88/07/29 4.0 RPCSRC"; 39 #else 40 __RCSID("$NetBSD: svc_run.c,v 1.27.2.1 2017/03/20 06:56:58 pgoyette Exp $"); 41 #endif 42 #endif 43 44 /* 45 * This is the rpc server side idle loop 46 * Wait for input, call server program. 47 */ 48 #include "namespace.h" 49 #include "reentrant.h" 50 #include <err.h> 51 #include <errno.h> 52 #include <stdio.h> 53 #include <stdlib.h> 54 #include <string.h> 55 #include <unistd.h> 56 #include <poll.h> 57 58 #include <rpc/rpc.h> 59 60 #include "svc_fdset.h" 61 #include "rpc_internal.h" 62 63 #ifdef __weak_alias 64 __weak_alias(svc_run,_svc_run) 65 __weak_alias(svc_exit,_svc_exit) 66 #endif 67 68 static void 69 svc_run_select(void) 70 { 71 fd_set *readfds; 72 struct timeval timeout; 73 int *maxfd, fdsize; 74 #ifndef RUMP_RPC 75 int probs = 0; 76 #endif 77 #ifdef _REENTRANT 78 extern rwlock_t svc_fd_lock; 79 #endif 80 81 readfds = NULL; 82 fdsize = 0; 83 timeout.tv_sec = 30; 84 timeout.tv_usec = 0; 85 86 for (;;) { 87 rwlock_rdlock(&svc_fd_lock); 88 89 maxfd = svc_fdset_getmax(); 90 if (maxfd == NULL) { 91 warn("%s: can't get maxfd", __func__); 92 goto out; 93 } 94 95 if (fdsize != svc_fdset_getsize(0)) { 96 fdsize = svc_fdset_getsize(0); 97 free(readfds); 98 readfds = svc_fdset_copy(svc_fdset_get()); 99 if (readfds == NULL) { 100 warn("%s: can't copy fdset", __func__); 101 goto out; 102 } 103 } else 104 memcpy(readfds, svc_fdset_get(), __NFD_BYTES(fdsize)); 105 106 rwlock_unlock(&svc_fd_lock); 107 108 switch (select(*maxfd + 1, readfds, NULL, NULL, &timeout)) { 109 case -1: 110 #ifndef RUMP_RPC 111 if ((errno == EINTR || errno == EBADF) && probs < 100) { 112 probs++; 113 continue; 114 } 115 #endif 116 if (errno == EINTR) { 117 continue; 118 } 119 warn("%s: select failed", __func__); 120 goto out; 121 case 0: 122 __svc_clean_idle(NULL, 30, FALSE); 123 continue; 124 default: 125 svc_getreqset2(readfds, fdsize); 126 #ifndef RUMP_RPC 127 probs = 0; 128 #endif 129 } 130 } 131 out: 132 free(readfds); 133 } 134 135 static void 136 svc_run_poll(void) 137 { 138 struct pollfd *pfd; 139 int *maxfd, fdsize, i; 140 #ifndef RUMP_RPC 141 int probs = 0; 142 #endif 143 #ifdef _REENTRANT 144 extern rwlock_t svc_fd_lock; 145 #endif 146 147 fdsize = 0; 148 pfd = NULL; 149 150 for (;;) { 151 rwlock_rdlock(&svc_fd_lock); 152 153 maxfd = svc_pollfd_getmax(); 154 if (maxfd == NULL) { 155 warn("can't get maxfd"); 156 goto out; 157 } 158 159 if (pfd == NULL || fdsize != svc_pollfd_getsize(0)) { 160 fdsize = svc_fdset_getsize(0); 161 free(pfd); 162 pfd = svc_pollfd_copy(svc_pollfd_get()); 163 if (pfd == NULL) { 164 warn("can't get pollfd"); 165 goto out; 166 } 167 } else 168 memcpy(pfd, svc_pollfd_get(), *maxfd * sizeof(*pfd)); 169 170 rwlock_unlock(&svc_fd_lock); 171 172 switch ((i = poll(pfd, (nfds_t)*maxfd, 30 * 1000))) { 173 case -1: 174 #ifndef RUMP_RPC 175 if ((errno == EINTR || errno == EBADF) && probs < 100) { 176 probs++; 177 continue; 178 } 179 #endif 180 if (errno == EINTR) { 181 continue; 182 } 183 warn("%s: poll failed", __func__); 184 goto out; 185 case 0: 186 __svc_clean_idle(NULL, 30, FALSE); 187 continue; 188 default: 189 svc_getreq_poll(pfd, i); 190 #ifndef RUMP_RPC 191 probs = 0; 192 #endif 193 } 194 } 195 out: 196 free(pfd); 197 } 198 199 void 200 svc_run(void) 201 { 202 (__svc_flags & SVC_FDSET_POLL) ? svc_run_poll() : svc_run_select(); 203 } 204 205 /* 206 * This function causes svc_run() to exit by telling it that it has no 207 * more work to do. 208 */ 209 void 210 svc_exit(void) 211 { 212 #ifdef _REENTRANT 213 extern rwlock_t svc_fd_lock; 214 #endif 215 216 rwlock_wrlock(&svc_fd_lock); 217 svc_fdset_zero(); 218 rwlock_unlock(&svc_fd_lock); 219 } 220
Indexes created Fri Oct 03 02:09:57 GMT 2025