misc.c revision 1.19
1 /* $NetBSD: misc.c,v 1.19 2018/06/26 06:48:03 msaitoh Exp $ */ 2 3 /*- 4 * Copyright (c) 2008 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Christos Zoulas 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __RCSID("$NetBSD: misc.c,v 1.19 2018/06/26 06:48:03 msaitoh Exp $"); 34 35 #include <stdbool.h> 36 #include <sys/param.h> 37 #include <sys/types.h> 38 #include <sys/time.h> 39 #include <sys/stat.h> 40 #include <sys/condvar.h> 41 #include <sys/selinfo.h> 42 #include <sys/filedesc.h> 43 #define _KERNEL 44 #include <sys/mqueue.h> 45 #include <sys/eventvar.h> 46 #undef _KERNEL 47 #include <sys/proc.h> 48 #define _KERNEL 49 #include <sys/file.h> 50 #define copyout_t int 51 #include <sys/ksem.h> 52 #define _LIB_LIBKERN_LIBKERN_H_ 53 #define mutex_enter(a) 54 #define mutex_exit(a) 55 #undef _KERNEL 56 #include <sys/cprng.h> 57 #include <sys/vnode.h> 58 #include <sys/mount.h> 59 60 #include <net/bpfdesc.h> 61 62 #include <err.h> 63 #include <util.h> 64 #include <string.h> 65 #include <kvm.h> 66 #include "fstat.h" 67 68 static struct nlist nl[] = { 69 #define NL_BPF 0 70 { .n_name = "bpf_fileops", }, 71 #define NL_CRYPTO 1 72 { .n_name = "cryptofops" }, 73 #define NL_DMIO 2 74 { .n_name = "dmio_fileops", }, 75 #define NL_DRVCTL 3 76 { .n_name = "drvctl_fileops", }, 77 #define NL_DTV_DEMUX 4 78 { .n_name = "dtv_demux_fileops", }, 79 #define NL_FILEMON 5 80 { .n_name = "filemon_fileops", }, 81 #define NL_KQUEUE 6 82 { .n_name = "kqueueops" }, 83 #define NL_MQUEUE 7 84 { .n_name = "mqops" }, 85 #define NL_PIPE 8 86 { .n_name = "pipeops" }, 87 #define NL_PUTTER 9 88 { .n_name = "putter_fileops", }, 89 #define NL_RND 10 90 { .n_name = "rnd_fileops", }, 91 #define NL_SEM 11 92 { .n_name = "semops", }, 93 #define NL_SOCKET 12 94 { .n_name = "socketops" }, 95 #define NL_SVR4_NET 13 96 { .n_name = "svr4_netops" }, 97 #define NL_SVR4_32_NET 14 98 { .n_name = "svr4_32_netops" }, 99 #define NL_TAP 15 100 { .n_name = "tap_fileops", }, 101 #define NL_VNOPS 16 102 { .n_name = "vnops" }, 103 #define NL_XENEVT 17 104 { .n_name = "xenevt_fileops" }, 105 #define NL_AUDIO 18 106 { .n_name = "audio_fileops" }, 107 #define NL_PAD 19 108 { .n_name = "pad_fileops" }, 109 #define NL_MAX 20 110 { .n_name = NULL } 111 }; 112 113 extern int vflg; 114 115 116 static int 117 p_bpf(struct file *f) 118 { 119 struct bpf_d bpf; 120 struct bpf_if bi; 121 struct ifnet ifn; 122 123 strlcpy(ifn.if_xname, "???", sizeof(ifn.if_xname)); 124 125 if (!KVM_READ(f->f_data, &bpf, sizeof(bpf))) { 126 dprintf("can't read bpf at %p for pid %d", f->f_data, Pid); 127 return 0; 128 } 129 if (bpf.bd_bif != NULL) { 130 if (!KVM_READ(bpf.bd_bif, &bi, sizeof(bi))) 131 dprintf("can't read bpf interface at %p for pid %d", 132 bpf.bd_bif, Pid); 133 if (bi.bif_ifp != NULL) 134 if (!KVM_READ(bi.bif_ifp, &ifn, sizeof(ifn))) 135 dprintf("can't read net interfsace" 136 " at %p for pid %d", bi.bif_ifp, Pid); 137 } 138 (void)printf("* bpf@%s rec=%lu, dr=%lu, cap=%lu, pid=%lu", ifn.if_xname, 139 bpf.bd_rcount, bpf.bd_dcount, bpf.bd_ccount, 140 (unsigned long)bpf.bd_pid); 141 if (bpf.bd_promisc) 142 (void)printf(", promisc"); 143 if (bpf.bd_immediate) 144 (void)printf(", immed"); 145 if (bpf.bd_direction) 146 (void)printf(", direction"); 147 if (bpf.bd_jitcode != NULL) 148 (void)printf(", jit"); 149 if (bpf.bd_async) 150 (void)printf(", asyncgrp=%lu", (unsigned long)bpf.bd_pgid); 151 if (bpf.bd_state == BPF_IDLE) 152 (void)printf(", idle"); 153 else if (bpf.bd_state == BPF_WAITING) 154 (void)printf(", waiting"); 155 else if (bpf.bd_state == BPF_TIMED_OUT) 156 (void)printf(", timeout"); 157 (void)printf("\n"); 158 return 0; 159 } 160 161 static int 162 p_sem(struct file *f) 163 { 164 ksem_t ks; 165 if (!KVM_READ(f->f_data, &ks, sizeof(ks))) { 166 dprintf("can't read sem at %p for pid %d", f->f_data, Pid); 167 return 0; 168 } 169 (void)printf("* ksem ref=%u, value=%u, waiters=%u, flags=0x%x, " 170 "mode=%o, uid=%u, gid=%u", ks.ks_ref, ks.ks_value, ks.ks_waiters, 171 ks.ks_flags, ks.ks_mode, ks.ks_uid, ks.ks_gid); 172 if (ks.ks_name && ks.ks_namelen) { 173 char buf[64]; 174 if (ks.ks_namelen >= sizeof(buf)) 175 ks.ks_namelen = sizeof(buf) - 1; 176 if (!KVM_READ(ks.ks_name, buf, ks.ks_namelen)) { 177 dprintf("can't read sem name at %p for pid %d", 178 ks.ks_name, Pid); 179 } else { 180 buf[ks.ks_namelen] = '\0'; 181 (void)printf(", name=%s\n", buf); 182 return 0; 183 } 184 } 185 (void)printf("\n"); 186 return 0; 187 } 188 189 static int 190 p_mqueue(struct file *f) 191 { 192 struct mqueue mq; 193 194 if (!KVM_READ(f->f_data, &mq, sizeof(mq))) { 195 dprintf("can't read mqueue at %p for pid %d", f->f_data, Pid); 196 return 0; 197 } 198 (void)printf("* mqueue \"%s\"\n", mq.mq_name); 199 return 0; 200 } 201 202 static int 203 p_rnd(struct file *f) 204 { 205 struct cprng_strong { 206 char cs_name[16]; 207 int cs_flags; 208 /*...*/ 209 } str; 210 struct rnd_ctx { 211 struct cprng_strong *rc_cprng; 212 bool rc_hard; 213 } ctx; 214 char buf[1024]; 215 216 if (!KVM_READ(f->f_data, &ctx, sizeof(ctx))) { 217 dprintf("can't read rnd_ctx at %p for pid %d", f->f_data, Pid); 218 return 0; 219 } 220 if (!KVM_READ(ctx.rc_cprng, &str, sizeof(str))) { 221 dprintf("can't read cprng_strong at %p for pid %d", f->f_data,\ 222 Pid); 223 return 0; 224 } 225 snprintb(buf, sizeof(buf), CPRNG_FMT, str.cs_flags); 226 (void)printf("* rnd \"%s\" flags %s\n", str.cs_name, buf); 227 return 0; 228 } 229 230 static int 231 p_kqueue(struct file *f) 232 { 233 struct kqueue kq; 234 235 if (!KVM_READ(f->f_data, &kq, sizeof(kq))) { 236 dprintf("can't read kqueue at %p for pid %d", f->f_data, Pid); 237 return 0; 238 } 239 (void)printf("* kqueue pending %d\n", kq.kq_count); 240 return 0; 241 } 242 243 int 244 pmisc(struct file *f, const char *name) 245 { 246 size_t i; 247 if (nl[0].n_value == 0) { 248 int n; 249 if ((n = KVM_NLIST(nl)) == -1) 250 errx(1, "Cannot list kernel symbols (%s)", 251 KVM_GETERR()); 252 else if (n != 0 && vflg) { 253 char buf[1024]; 254 buf[0] = '\0'; 255 for (struct nlist *l = nl; l->n_name != NULL; l++) { 256 if (l->n_value != 0) 257 continue; 258 strlcat(buf, ", ", sizeof(buf)); 259 strlcat(buf, l->n_name, sizeof(buf)); 260 } 261 warnx("Could not find %d symbols: %s", n, buf + 2); 262 } 263 } 264 for (i = 0; i < NL_MAX; i++) 265 if ((uintptr_t)f->f_ops == nl[i].n_value) 266 break; 267 switch (i) { 268 case NL_BPF: 269 return p_bpf(f); 270 case NL_MQUEUE: 271 return p_mqueue(f); 272 case NL_KQUEUE: 273 return p_kqueue(f); 274 case NL_RND: 275 return p_rnd(f); 276 case NL_SEM: 277 return p_sem(f); 278 case NL_TAP: 279 printf("* tap %lu\n", (unsigned long)(intptr_t)f->f_data); 280 return 0; 281 case NL_CRYPTO: 282 printf("* crypto %p\n", f->f_data); 283 return 0; 284 case NL_AUDIO: 285 printf("* audio %p\n", f->f_data); 286 return 0; 287 case NL_PAD: 288 printf("* pad %p\n", f->f_data); 289 return 0; 290 case NL_MAX: 291 printf("* %s ops=%p %p\n", name, f->f_ops, f->f_data); 292 return 0; 293 default: 294 printf("* %s %p\n", nl[i].n_name, f->f_data); 295 return 0; 296 } 297 } 298
Indexes created Wed Oct 15 14:09:57 GMT 2025