svc_run.c revision 1.29.2.1
1 /* $NetBSD: svc_run.c,v 1.29.2.1 2025/08/02 05:54:40 perseant 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 1.29.2.1 2025/08/02 05:54:40 perseant 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 78 readfds = NULL; 79 fdsize = 0; 80 timeout.tv_sec = 30; 81 timeout.tv_usec = 0; 82 83 for (;;) { 84 rwlock_rdlock(&svc_fd_lock); 85 86 maxfd = svc_fdset_getmax(); 87 if (maxfd == NULL) { 88 rwlock_unlock(&svc_fd_lock); 89 warn("%s: can't get maxfd", __func__); 90 goto out; 91 } 92 93 if (fdsize != svc_fdset_getsize(0)) { 94 fdsize = svc_fdset_getsize(0); 95 free(readfds); 96 readfds = svc_fdset_copy(svc_fdset_get()); 97 if (readfds == NULL) { 98 rwlock_unlock(&svc_fd_lock); 99 warn("%s: can't copy fdset", __func__); 100 goto out; 101 } 102 } else 103 memcpy(readfds, svc_fdset_get(), __NFD_BYTES(fdsize)); 104 105 rwlock_unlock(&svc_fd_lock); 106 107 switch (select(*maxfd + 1, readfds, NULL, NULL, &timeout)) { 108 case -1: 109 #ifndef RUMP_RPC 110 if ((errno == EINTR || errno == EBADF) && probs < 100) { 111 probs++; 112 continue; 113 } 114 #endif 115 if (errno == EINTR) { 116 continue; 117 } 118 warn("%s: select failed", __func__); 119 goto out; 120 case 0: 121 __svc_clean_idle(NULL, 30, FALSE); 122 continue; 123 default: 124 svc_getreqset2(readfds, fdsize); 125 #ifndef RUMP_RPC 126 probs = 0; 127 #endif 128 } 129 } 130 out: 131 free(readfds); 132 } 133 134 static void 135 svc_run_poll(void) 136 { 137 struct pollfd *pfd; 138 int *maxfd, fdsize, i; 139 #ifndef RUMP_RPC 140 int probs = 0; 141 #endif 142 143 fdsize = 0; 144 pfd = NULL; 145 146 for (;;) { 147 rwlock_rdlock(&svc_fd_lock); 148 149 maxfd = svc_pollfd_getmax(); 150 if (maxfd == NULL) { 151 rwlock_unlock(&svc_fd_lock); 152 warn("can't get maxfd"); 153 goto out; 154 } 155 156 if (pfd == NULL || fdsize != svc_pollfd_getsize(0)) { 157 fdsize = svc_fdset_getsize(0); 158 free(pfd); 159 pfd = svc_pollfd_copy(svc_pollfd_get()); 160 if (pfd == NULL) { 161 rwlock_unlock(&svc_fd_lock); 162 warn("can't get pollfd"); 163 goto out; 164 } 165 } else 166 memcpy(pfd, svc_pollfd_get(), *maxfd * sizeof(*pfd)); 167 168 rwlock_unlock(&svc_fd_lock); 169 170 switch ((i = poll(pfd, (nfds_t)*maxfd, 30 * 1000))) { 171 case -1: 172 #ifndef RUMP_RPC 173 if ((errno == EINTR || errno == EBADF) && probs < 100) { 174 probs++; 175 continue; 176 } 177 #endif 178 if (errno == EINTR) { 179 continue; 180 } 181 warn("%s: poll failed", __func__); 182 goto out; 183 case 0: 184 __svc_clean_idle(NULL, 30, FALSE); 185 continue; 186 default: 187 svc_getreq_poll(pfd, i); 188 #ifndef RUMP_RPC 189 probs = 0; 190 #endif 191 } 192 } 193 out: 194 free(pfd); 195 } 196 197 void 198 svc_run(void) 199 { 200 (__svc_flags & SVC_FDSET_POLL) ? svc_run_poll() : svc_run_select(); 201 } 202 203 /* 204 * This function causes svc_run() to exit by telling it that it has no 205 * more work to do. 206 */ 207 void 208 svc_exit(void) 209 { 210 211 rwlock_wrlock(&svc_fd_lock); 212 svc_fdset_zero(); 213 rwlock_unlock(&svc_fd_lock); 214 } 215
Indexes created Fri Oct 03 02:09:57 GMT 2025