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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include <dlfcn.h> 30 #include <link.h> 31 32 #include <fmd_module.h> 33 #include <fmd_error.h> 34 #include <fmd_alloc.h> 35 #include <fmd_subr.h> 36 #include <fmd_event.h> 37 #include <fmd.h> 38 39 typedef struct fmd_rtld { 40 void *rtld_dlp; /* libdl(3DL) handle for shared library */ 41 void (*rtld_init)(fmd_hdl_t *); /* shared library's _fmd_init() */ 42 void (*rtld_fini)(fmd_hdl_t *); /* shared library's _fmd_fini() */ 43 } fmd_rtld_t; 44 45 static int 46 rtld_init(fmd_module_t *mp) 47 { 48 fmd_rtld_t *rp; 49 void *dlp; 50 51 if ((dlp = dlopen(mp->mod_path, RTLD_LOCAL | RTLD_NOW)) == NULL) { 52 fmd_error(EFMD_RTLD_OPEN, "%s\n", dlerror()); 53 return (fmd_set_errno(EFMD_RTLD_OPEN)); 54 } 55 56 rp = mp->mod_data = fmd_alloc(sizeof (fmd_rtld_t), FMD_SLEEP); 57 58 rp->rtld_dlp = dlp; 59 rp->rtld_init = (void (*)())dlsym(dlp, "_fmd_init"); 60 rp->rtld_fini = (void (*)())dlsym(dlp, "_fmd_fini"); 61 62 if (rp->rtld_init == NULL) { 63 (void) dlclose(dlp); 64 fmd_free(rp, sizeof (fmd_rtld_t)); 65 return (fmd_set_errno(EFMD_RTLD_INIT)); 66 } 67 68 (void) pthread_mutex_unlock(&mp->mod_lock); 69 70 /* 71 * Call _fmd_init() in the module. If this causes a module abort and 72 * mod_info has been registered, unregister it on behalf of the module. 73 */ 74 if (fmd_module_enter(mp, rp->rtld_init) != 0 && mp->mod_info != NULL) 75 fmd_hdl_unregister((fmd_hdl_t *)mp); 76 77 fmd_module_exit(mp); 78 (void) pthread_mutex_lock(&mp->mod_lock); 79 80 if (mp->mod_info == NULL) { 81 (void) dlclose(dlp); 82 fmd_free(rp, sizeof (fmd_rtld_t)); 83 return (fmd_set_errno(EFMD_HDL_INIT)); 84 } 85 86 return (0); 87 } 88 89 static int 90 rtld_fini(fmd_module_t *mp) 91 { 92 fmd_rtld_t *rp = mp->mod_data; 93 int doclose = 1, err = 0; 94 95 if (mp->mod_info != NULL) { 96 (void) fmd_module_enter(mp, rp->rtld_fini); 97 98 if (mp->mod_info != NULL) { 99 fmd_module_lock(mp); 100 fmd_module_unregister(mp); 101 fmd_module_unlock(mp); 102 } 103 104 fmd_module_exit(mp); 105 } 106 107 (void) fmd_conf_getprop(fmd.d_conf, "plugin.close", &doclose); 108 if (doclose) 109 err = dlclose(rp->rtld_dlp); 110 111 fmd_free(rp, sizeof (fmd_rtld_t)); 112 return (err); 113 } 114 115 const fmd_modops_t fmd_rtld_ops = { 116 rtld_init, 117 rtld_fini, 118 fmd_module_dispatch, 119 fmd_module_transport, 120 }; 121