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 #include <dlfcn.h> 28 #include <link.h> 29 30 #include <fmd_module.h> 31 #include <fmd_error.h> 32 #include <fmd_alloc.h> 33 #include <fmd_subr.h> 34 #include <fmd_event.h> 35 #include <fmd.h> 36 37 typedef struct fmd_rtld { 38 void *rtld_dlp; /* libdl(3DL) handle for shared library */ 39 void (*rtld_init)(fmd_hdl_t *); /* shared library's _fmd_init() */ 40 void (*rtld_fini)(fmd_hdl_t *); /* shared library's _fmd_fini() */ 41 } fmd_rtld_t; 42 43 static int 44 rtld_init(fmd_module_t *mp) 45 { 46 fmd_rtld_t *rp; 47 void *dlp; 48 49 if ((dlp = dlopen(mp->mod_path, RTLD_LOCAL | RTLD_NOW)) == NULL) { 50 fmd_error(EFMD_RTLD_OPEN, "%s\n", dlerror()); 51 return (fmd_set_errno(EFMD_RTLD_OPEN)); 52 } 53 54 rp = mp->mod_data = fmd_alloc(sizeof (fmd_rtld_t), FMD_SLEEP); 55 56 rp->rtld_dlp = dlp; 57 rp->rtld_init = (void (*)())dlsym(dlp, "_fmd_init"); 58 rp->rtld_fini = (void (*)())dlsym(dlp, "_fmd_fini"); 59 60 if (rp->rtld_init == NULL) { 61 (void) dlclose(dlp); 62 fmd_free(rp, sizeof (fmd_rtld_t)); 63 return (fmd_set_errno(EFMD_RTLD_INIT)); 64 } 65 66 (void) pthread_mutex_unlock(&mp->mod_lock); 67 68 /* 69 * Call _fmd_init() in the module. If this causes a module abort and 70 * mod_info has been registered, unregister it on behalf of the module. 71 */ 72 if (fmd_module_enter(mp, rp->rtld_init) != 0 && mp->mod_info != NULL) 73 fmd_hdl_unregister((fmd_hdl_t *)mp); 74 75 fmd_module_exit(mp); 76 (void) pthread_mutex_lock(&mp->mod_lock); 77 78 if (mp->mod_info == NULL) { 79 (void) dlclose(dlp); 80 fmd_free(rp, sizeof (fmd_rtld_t)); 81 return (fmd_set_errno(EFMD_HDL_INIT)); 82 } 83 84 return (0); 85 } 86 87 static int 88 rtld_fini(fmd_module_t *mp) 89 { 90 fmd_rtld_t *rp = mp->mod_data; 91 int doclose = 1, err = 0; 92 93 if (mp->mod_info != NULL) { 94 (void) fmd_module_enter(mp, rp->rtld_fini); 95 96 if (mp->mod_info != NULL) { 97 fmd_module_lock(mp); 98 fmd_module_unregister(mp); 99 fmd_module_unlock(mp); 100 } 101 102 fmd_module_exit(mp); 103 } 104 105 (void) fmd_conf_getprop(fmd.d_conf, "plugin.close", &doclose); 106 if (doclose) 107 err = dlclose(rp->rtld_dlp); 108 109 fmd_free(rp, sizeof (fmd_rtld_t)); 110 return (err); 111 } 112 113 const fmd_modops_t fmd_rtld_ops = { 114 rtld_init, 115 rtld_fini, 116 fmd_module_dispatch, 117 fmd_module_transport, 118 }; 119