misc.c revision 1.15
1 /* $NetBSD: misc.c,v 1.15 2015/12/30 18:15:38 christos 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 1.15 2015/12/30 18:15:38 christos Exp $"); 34 35 #define _KMEMUSER 36 #include <stdbool.h> 37 #include <sys/param.h> 38 #include <sys/types.h> 39 #include <sys/time.h> 40 #include <sys/stat.h> 41 #include <sys/condvar.h> 42 #include <sys/selinfo.h> 43 #include <sys/filedesc.h> 44 #define _KERNEL 45 #include <sys/mqueue.h> 46 #include <sys/eventvar.h> 47 #undef _KERNEL 48 #include <sys/proc.h> 49 #define _KERNEL 50 #include <sys/file.h> 51 #define copyout_t int 52 #include <sys/ksem.h> 53 #define _LIB_LIBKERN_LIBKERN_H_ 54 #define mutex_enter(a) 55 #define mutex_exit(a) 56 #undef _KERNEL 57 #include <sys/cprng.h> 58 #include <sys/vnode.h> 59 #include <sys/mount.h> 60 61 #include <net/bpfdesc.h> 62 63 #include <err.h> 64 #include <util.h> 65 #include <string.h> 66 #include <kvm.h> 67 #include "fstat.h" 68 69 static struct nlist nl[] = { 70 #define NL_BPF 0 71 { .n_name = "bpf_fileops", }, 72 #define NL_CRYPTO 1 73 { .n_name = "cryptofops" }, 74 #define NL_DMIO 2 75 { .n_name = "dmio_fileops", }, 76 #define NL_DRVCTL 3 77 { .n_name = "drvctl_fileops", }, 78 #define NL_DTV_DEMUX 4 79 { .n_name = "dtv_demux_fileops", }, 80 #define NL_FILEMON 5 81 { .n_name = "filemon_fileops", }, 82 #define NL_KQUEUE 6 83 { .n_name = "kqueueops" }, 84 #define NL_MQUEUE 7 85 { .n_name = "mqops" }, 86 #define NL_PIPE 8 87 { .n_name = "pipeops" }, 88 #define NL_PUTTER 9 89 { .n_name = "putter_fileops", }, 90 #define NL_RND 10 91 { .n_name = "rnd_fileops", }, 92 #define NL_SEM 11 93 { .n_name = "semops", }, 94 #define NL_SOCKET 12 95 { .n_name = "socketops" }, 96 #define NL_SVR4_NET 13 97 { .n_name = "svr4_netops" }, 98 #define NL_SVR4_32_NET 14 99 { .n_name = "svr4_32_netops" }, 100 #define NL_TAP 15 101 { .n_name = "tap_fileops", }, 102 #define NL_VNOPS 16 103 { .n_name = "vnops" }, 104 #define NL_XENEVT 17 105 { .n_name = "xenevt_fileops" }, 106 #define NL_MAX 18 107 { .n_name = NULL } 108 }; 109 110 extern int vflg; 111 112 113 static int 114 p_bpf(struct file *f) 115 { 116 struct bpf_d bpf; 117 118 if (!KVM_READ(f->f_data, &bpf, sizeof(bpf))) { 119 dprintf("can't read bpf at %p for pid %d", f->f_data, Pid); 120 return 0; 121 } 122 (void)printf("* bpf rec=%lu, dr=%lu, cap=%lu, pid=%lu", 123 bpf.bd_rcount, bpf.bd_dcount, bpf.bd_ccount, 124 (unsigned long)bpf.bd_pid); 125 if (bpf.bd_promisc) 126 (void)printf(", promisc"); 127 if (bpf.bd_immediate) 128 (void)printf(", immed"); 129 if (bpf.bd_seesent) 130 (void)printf(", seesent"); 131 if (bpf.bd_jitcode != NULL) 132 (void)printf(", jit"); 133 if (bpf.bd_async) 134 (void)printf(", asyncgrp=%lu", (unsigned long)bpf.bd_pgid); 135 if (bpf.bd_state == BPF_IDLE) 136 (void)printf(", idle"); 137 else if (bpf.bd_state == BPF_WAITING) 138 (void)printf(", waiting"); 139 else if (bpf.bd_state == BPF_TIMED_OUT) 140 (void)printf(", timeout"); 141 (void)printf("\n"); 142 return 0; 143 } 144 145 static int 146 p_sem(struct file *f) 147 { 148 ksem_t ks; 149 if (!KVM_READ(f->f_data, &ks, sizeof(ks))) { 150 dprintf("can't read sem at %p for pid %d", f->f_data, Pid); 151 return 0; 152 } 153 (void)printf("* ksem ref=%u, value=%u, waiters=%u, flags=0x%x, " 154 "mode=%o, uid=%u, gid=%u", ks.ks_ref, ks.ks_value, ks.ks_waiters, 155 ks.ks_flags, ks.ks_mode, ks.ks_uid, ks.ks_gid); 156 if (ks.ks_name && ks.ks_namelen) { 157 char buf[64]; 158 if (ks.ks_namelen >= sizeof(buf)) 159 ks.ks_namelen = sizeof(buf) - 1; 160 if (!KVM_READ(ks.ks_name, buf, ks.ks_namelen)) { 161 dprintf("can't read sem name at %p for pid %d", 162 ks.ks_name, Pid); 163 } else { 164 buf[ks.ks_namelen] = '\0'; 165 (void)printf(", name=%s\n", buf); 166 return 0; 167 } 168 } 169 (void)printf("\n"); 170 return 0; 171 } 172 173 static int 174 p_mqueue(struct file *f) 175 { 176 struct mqueue mq; 177 178 if (!KVM_READ(f->f_data, &mq, sizeof(mq))) { 179 dprintf("can't read mqueue at %p for pid %d", f->f_data, Pid); 180 return 0; 181 } 182 (void)printf("* mqueue \"%s\"\n", mq.mq_name); 183 return 0; 184 } 185 186 static int 187 p_rnd(struct file *f) 188 { 189 struct cprng_strong { 190 char cs_name[16]; 191 int cs_flags; 192 /*...*/ 193 } str; 194 struct rnd_ctx { 195 struct cprng_strong *rc_cprng; 196 bool rc_hard; 197 } ctx; 198 char buf[1024]; 199 200 if (!KVM_READ(f->f_data, &ctx, sizeof(ctx))) { 201 dprintf("can't read rnd_ctx at %p for pid %d", f->f_data, Pid); 202 return 0; 203 } 204 if (!KVM_READ(ctx.rc_cprng, &str, sizeof(str))) { 205 dprintf("can't read cprng_strong at %p for pid %d", f->f_data,\ 206 Pid); 207 return 0; 208 } 209 snprintb(buf, sizeof(buf), CPRNG_FMT, str.cs_flags); 210 (void)printf("* rnd \"%s\" flags %s\n", str.cs_name, buf); 211 return 0; 212 } 213 214 static int 215 p_kqueue(struct file *f) 216 { 217 struct kqueue kq; 218 219 if (!KVM_READ(f->f_data, &kq, sizeof(kq))) { 220 dprintf("can't read kqueue at %p for pid %d", f->f_data, Pid); 221 return 0; 222 } 223 (void)printf("* kqueue pending %d\n", kq.kq_count); 224 return 0; 225 } 226 227 int 228 pmisc(struct file *f, const char *name) 229 { 230 size_t i; 231 if (nl[0].n_value == 0) { 232 int n; 233 if ((n = KVM_NLIST(nl)) == -1) 234 errx(1, "Cannot list kernel symbols (%s)", 235 KVM_GETERR()); 236 else if (n != 0 && vflg) { 237 char buf[1024]; 238 buf[0] = '\0'; 239 for (struct nlist *l = nl; l->n_name != NULL; l++) { 240 if (l->n_value != 0) 241 continue; 242 strlcat(buf, ", ", sizeof(buf)); 243 strlcat(buf, l->n_name, sizeof(buf)); 244 } 245 warnx("Could not find %d symbols: %s", n, buf + 2); 246 } 247 } 248 for (i = 0; i < NL_MAX; i++) 249 if ((uintptr_t)f->f_ops == nl[i].n_value) 250 break; 251 switch (i) { 252 case NL_BPF: 253 return p_bpf(f); 254 case NL_MQUEUE: 255 return p_mqueue(f); 256 case NL_KQUEUE: 257 return p_kqueue(f); 258 case NL_RND: 259 return p_rnd(f); 260 case NL_SEM: 261 return p_sem(f); 262 case NL_TAP: 263 printf("* tap %lu\n", (unsigned long)(intptr_t)f->f_data); 264 return 0; 265 case NL_CRYPTO: 266 printf("* crypto %p\n", f->f_data); 267 return 0; 268 case NL_MAX: 269 printf("* %s ops=%p %p\n", name, f->f_ops, f->f_data); 270 return 0; 271 default: 272 printf("* %s %p\n", nl[i].n_name, f->f_data); 273 return 0; 274 } 275 } 276
Indexes created Tue Sep 23 21:09:50 GMT 2025