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 /* 23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #include "lint.h" 28 #include <sys/types.h> 29 #include <sys/stat.h> 30 #include <fcntl.h> 31 #include <unistd.h> 32 #include <sys/port_impl.h> 33 #include <errno.h> 34 #include <stdlib.h> 35 #include <sys/systm.h> 36 #include <libc.h> 37 38 /* 39 * The second argument of _portfs(PORT_CREATE, 0,,,) represents the version 40 * number of the event ports framework. The version number is required to 41 * identify possible changes/extensions of the port_event_t structure. If an 42 * extension is required the port_create() function will be mapped to a second 43 * library create function like port_create_v1(PORT_CREATE, VERSION,,,) 44 * VERSION will be a number > 0. 45 * As long as such an extension is not required the second argument will be 46 * set to 0 and no check will be done in the kernel interface. 47 */ 48 int 49 port_create() 50 { 51 rval_t r; 52 r.r_vals = _portfs(PORT_CREATE | PORT_SYS_NOPORT, 0, 0, 0, 0, 0); 53 return (r.r_val1); 54 } 55 56 int 57 port_associate(int port, int source, uintptr_t object, int events, void *user) 58 { 59 rval_t r; 60 r.r_vals = _portfs(PORT_ASSOCIATE, port, source, object, events, 61 (uintptr_t)user); 62 return (r.r_val1); 63 } 64 65 66 int 67 port_get(int port, port_event_t *pe, struct timespec *to) 68 { 69 rval_t r; 70 if (to) 71 r.r_vals = _portfs(PORT_GET, port, (uintptr_t)pe, to->tv_sec, 72 to->tv_nsec, (uintptr_t)to); 73 else 74 r.r_vals = _portfs(PORT_GET, port, (uintptr_t)pe, 0, 0, 0); 75 return (r.r_val1); 76 } 77 78 int 79 port_getn(int port, port_event_t list[], uint_t max, uint_t *nget, 80 struct timespec *timeout) 81 { 82 rval_t r; 83 if (nget == NULL) { 84 errno = EINVAL; 85 return (-1); 86 } 87 r.r_vals = _portfs(PORT_GETN, port, (uintptr_t)list, max, *nget, 88 (uintptr_t)timeout); 89 if (r.r_val1 == -1) { 90 /* global error, errno is already set */ 91 return (-1); 92 } 93 *nget = r.r_val1; 94 if (r.r_val2 == ETIME) { 95 errno = ETIME; 96 return (-1); 97 } 98 return (r.r_val2); 99 } 100 101 int 102 port_dissociate(int port, int source, uintptr_t object) 103 { 104 rval_t r; 105 r.r_vals = _portfs(PORT_DISSOCIATE, port, source, object, 0, 0); 106 return (r.r_val1); 107 } 108 109 int 110 port_send(int port, int events, void *user) 111 { 112 rval_t r; 113 r.r_vals = _portfs(PORT_SEND, port, events, (uintptr_t)user, 0, 0); 114 return (r.r_val1); 115 } 116 117 /* 118 * _port_dispatch() will block if there are not resources available to 119 * satisfy the request. 120 */ 121 122 int 123 _port_dispatch(int port, int flags, int source, int events, uintptr_t object, 124 void *user) 125 { 126 rval_t r; 127 if (flags & PORT_SHARE_EVENT) 128 r.r_vals = _portfs(PORT_DISPATCH, port, source, events, object, 129 (uintptr_t)user); 130 else 131 r.r_vals = _portfs(PORT_DISPATCH | PORT_SYS_NOSHARE, port, 132 source, events, object, (uintptr_t)user); 133 return (r.r_val1); 134 } 135 136 int 137 port_sendn(int ports[], int errors[], uint_t nent, int events, void *user) 138 { 139 rval_t r; 140 uint_t offset; 141 uint_t lnent; 142 uint_t nevents; 143 if (nent <= PORT_MAX_LIST) { 144 r.r_vals = _portfs(PORT_SENDN | PORT_SYS_NOPORT, 145 (uintptr_t)ports, (uintptr_t)errors, nent, events, 146 (uintptr_t)user); 147 return (r.r_val1); 148 } 149 150 /* use chunks of max PORT_MAX_LIST elements per syscall */ 151 nevents = 0; 152 for (offset = 0; offset < nent; ) { 153 lnent = nent - offset; 154 if (nent - offset > PORT_MAX_LIST) 155 lnent = PORT_MAX_LIST; 156 else 157 lnent = nent - offset; 158 r.r_vals = _portfs(PORT_SENDN | PORT_SYS_NOPORT, 159 (uintptr_t)&ports[offset], (uintptr_t)&errors[offset], 160 lnent, events, (uintptr_t)user); 161 if (r.r_val2 == -1) { 162 /* global error, return last no of events submitted */ 163 if (nevents) 164 return (nevents); 165 return (-1); 166 } 167 nevents += r.r_val1; 168 offset += lnent; 169 } 170 /* list submitted */ 171 return (nevents); 172 } 173 174 int 175 port_alert(int port, int flags, int events, void *user) 176 { 177 rval_t r; 178 r.r_vals = _portfs(PORT_ALERT, port, flags, events, (uintptr_t)user, 0); 179 return (r.r_val1); 180 } 181