kern_mod_80.c revision 1.2
1 1.2 pgoyette /* $NetBSD: kern_mod_80.c,v 1.2 2019/01/27 02:08:39 pgoyette Exp $ */ 2 1.2 pgoyette 3 1.2 pgoyette /*- 4 1.2 pgoyette * Copyright (c) 2008 The NetBSD Foundation, Inc. 5 1.2 pgoyette * All rights reserved. 6 1.2 pgoyette * 7 1.2 pgoyette * Redistribution and use in source and binary forms, with or without 8 1.2 pgoyette * modification, are permitted provided that the following conditions 9 1.2 pgoyette * are met: 10 1.2 pgoyette * 1. Redistributions of source code must retain the above copyright 11 1.2 pgoyette * notice, this list of conditions and the following disclaimer. 12 1.2 pgoyette * 2. Redistributions in binary form must reproduce the above copyright 13 1.2 pgoyette * notice, this list of conditions and the following disclaimer in the 14 1.2 pgoyette * documentation and/or other materials provided with the distribution. 15 1.2 pgoyette * 16 1.2 pgoyette * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 1.2 pgoyette * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 1.2 pgoyette * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 1.2 pgoyette * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 1.2 pgoyette * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 1.2 pgoyette * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 1.2 pgoyette * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 1.2 pgoyette * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 1.2 pgoyette * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 1.2 pgoyette * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 1.2 pgoyette * POSSIBILITY OF SUCH DAMAGE. 27 1.2 pgoyette */ 28 1.2 pgoyette 29 1.2 pgoyette /* 30 1.2 pgoyette * System calls relating to loadable modules. 31 1.2 pgoyette */ 32 1.2 pgoyette 33 1.2 pgoyette #include <sys/cdefs.h> 34 1.2 pgoyette __KERNEL_RCSID(0, "$NetBSD: kern_mod_80.c,v 1.2 2019/01/27 02:08:39 pgoyette Exp $"); 35 1.2 pgoyette 36 1.2 pgoyette #ifdef _KERNEL_OPT 37 1.2 pgoyette #include "opt_compat_netbsd.h" 38 1.2 pgoyette #include "opt_modular.h" 39 1.2 pgoyette #endif 40 1.2 pgoyette 41 1.2 pgoyette #include <sys/param.h> 42 1.2 pgoyette #include <sys/systm.h> 43 1.2 pgoyette #include <sys/proc.h> 44 1.2 pgoyette #include <sys/namei.h> 45 1.2 pgoyette #include <sys/kauth.h> 46 1.2 pgoyette #include <sys/kmem.h> 47 1.2 pgoyette #include <sys/kobj.h> 48 1.2 pgoyette #include <sys/module.h> 49 1.2 pgoyette #include <sys/syscall.h> 50 1.2 pgoyette #include <sys/syscallargs.h> 51 1.2 pgoyette #include <sys/compat_stub.h> 52 1.2 pgoyette 53 1.2 pgoyette #include <compat/common/compat_mod.h> 54 1.2 pgoyette 55 1.2 pgoyette static int 56 1.2 pgoyette compat_80_modstat(int cmd, struct iovec *iov, void *arg) 57 1.2 pgoyette { 58 1.2 pgoyette omodstat_t *oms, *omso; 59 1.2 pgoyette modinfo_t *mi; 60 1.2 pgoyette module_t *mod; 61 1.2 pgoyette vaddr_t addr; 62 1.2 pgoyette size_t size; 63 1.2 pgoyette size_t omslen; 64 1.2 pgoyette size_t used; 65 1.2 pgoyette int error; 66 1.2 pgoyette int omscnt; 67 1.2 pgoyette bool stataddr; 68 1.2 pgoyette const char *suffix = "..."; 69 1.2 pgoyette 70 1.2 pgoyette if (cmd != MODCTL_OSTAT) 71 1.2 pgoyette return EINVAL; 72 1.2 pgoyette 73 1.2 pgoyette error = copyin(arg, iov, sizeof(*iov)); 74 1.2 pgoyette if (error != 0) { 75 1.2 pgoyette return error; 76 1.2 pgoyette } 77 1.2 pgoyette 78 1.2 pgoyette /* If not privileged, don't expose kernel addresses. */ 79 1.2 pgoyette error = kauth_authorize_system(kauth_cred_get(), KAUTH_SYSTEM_MODULE, 80 1.2 pgoyette 0, (void *)(uintptr_t)MODCTL_STAT, NULL, NULL); 81 1.2 pgoyette stataddr = (error == 0); 82 1.2 pgoyette 83 1.2 pgoyette kernconfig_lock(); 84 1.2 pgoyette omscnt = 0; 85 1.2 pgoyette TAILQ_FOREACH(mod, &module_list, mod_chain) { 86 1.2 pgoyette omscnt++; 87 1.2 pgoyette mi = mod->mod_info; 88 1.2 pgoyette } 89 1.2 pgoyette TAILQ_FOREACH(mod, &module_builtins, mod_chain) { 90 1.2 pgoyette omscnt++; 91 1.2 pgoyette mi = mod->mod_info; 92 1.2 pgoyette } 93 1.2 pgoyette omslen = omscnt * sizeof(omodstat_t); 94 1.2 pgoyette omso = kmem_zalloc(omslen, KM_SLEEP); 95 1.2 pgoyette oms = omso; 96 1.2 pgoyette TAILQ_FOREACH(mod, &module_list, mod_chain) { 97 1.2 pgoyette mi = mod->mod_info; 98 1.2 pgoyette strlcpy(oms->oms_name, mi->mi_name, sizeof(oms->oms_name)); 99 1.2 pgoyette if (mi->mi_required != NULL) { 100 1.2 pgoyette used = strlcpy(oms->oms_required, mi->mi_required, 101 1.2 pgoyette sizeof(oms->oms_required)); 102 1.2 pgoyette if (used >= sizeof(oms->oms_required)) { 103 1.2 pgoyette oms->oms_required[sizeof(oms->oms_required) - 104 1.2 pgoyette strlen(suffix) - 1] = '\0'; 105 1.2 pgoyette strlcat(oms->oms_required, suffix, 106 1.2 pgoyette sizeof(oms->oms_required)); 107 1.2 pgoyette } 108 1.2 pgoyette } 109 1.2 pgoyette if (mod->mod_kobj != NULL && stataddr) { 110 1.2 pgoyette kobj_stat(mod->mod_kobj, &addr, &size); 111 1.2 pgoyette oms->oms_addr = addr; 112 1.2 pgoyette oms->oms_size = size; 113 1.2 pgoyette } 114 1.2 pgoyette oms->oms_class = mi->mi_class; 115 1.2 pgoyette oms->oms_refcnt = mod->mod_refcnt; 116 1.2 pgoyette oms->oms_source = mod->mod_source; 117 1.2 pgoyette oms->oms_flags = mod->mod_flags; 118 1.2 pgoyette oms++; 119 1.2 pgoyette } 120 1.2 pgoyette TAILQ_FOREACH(mod, &module_builtins, mod_chain) { 121 1.2 pgoyette mi = mod->mod_info; 122 1.2 pgoyette strlcpy(oms->oms_name, mi->mi_name, sizeof(oms->oms_name)); 123 1.2 pgoyette if (mi->mi_required != NULL) { 124 1.2 pgoyette used = strlcpy(oms->oms_required, mi->mi_required, 125 1.2 pgoyette sizeof(oms->oms_required)); 126 1.2 pgoyette if (used >= sizeof(oms->oms_required)) { 127 1.2 pgoyette oms->oms_required[sizeof(oms->oms_required) - 128 1.2 pgoyette strlen(suffix) - 1] = '\0'; 129 1.2 pgoyette strlcat(oms->oms_required, suffix, 130 1.2 pgoyette sizeof(oms->oms_required)); 131 1.2 pgoyette } 132 1.2 pgoyette } 133 1.2 pgoyette if (mod->mod_kobj != NULL && stataddr) { 134 1.2 pgoyette kobj_stat(mod->mod_kobj, &addr, &size); 135 1.2 pgoyette oms->oms_addr = addr; 136 1.2 pgoyette oms->oms_size = size; 137 1.2 pgoyette } 138 1.2 pgoyette oms->oms_class = mi->mi_class; 139 1.2 pgoyette oms->oms_refcnt = -1; 140 1.2 pgoyette KASSERT(mod->mod_source == MODULE_SOURCE_KERNEL); 141 1.2 pgoyette oms->oms_source = mod->mod_source; 142 1.2 pgoyette oms++; 143 1.2 pgoyette } 144 1.2 pgoyette kernconfig_unlock(); 145 1.2 pgoyette error = copyout(omso, iov->iov_base, uimin(omslen, iov->iov_len)); 146 1.2 pgoyette kmem_free(omso, omslen); 147 1.2 pgoyette if (error == 0) { 148 1.2 pgoyette iov->iov_len = omslen; 149 1.2 pgoyette error = copyout(iov, arg, sizeof(*iov)); 150 1.2 pgoyette } 151 1.2 pgoyette 152 1.2 pgoyette return error; 153 1.2 pgoyette } 154 1.2 pgoyette 155 1.2 pgoyette void 156 1.2 pgoyette kern_mod_80_init(void) 157 1.2 pgoyette { 158 1.2 pgoyette 159 1.2 pgoyette MODULE_SET_HOOK(compat_modstat_80_hook, "mod_80",compat_80_modstat); 160 1.2 pgoyette } 161 1.2 pgoyette 162 1.2 pgoyette void 163 1.2 pgoyette kern_mod_80_fini(void) 164 1.2 pgoyette { 165 1.2 pgoyette 166 1.2 pgoyette MODULE_UNSET_HOOK(compat_modstat_80_hook); 167 1.2 pgoyette } 168
Indexes created Mon Sep 22 13:09:51 GMT 2025