1 /*- 2 * Copyright (c) 1999 Marcel Moolenaar 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer 10 * in this position and unchanged. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31 #include <sys/param.h> 32 #include <sys/kernel.h> 33 #include <sys/systm.h> 34 #include <sys/sysctl.h> 35 #include <sys/proc.h> 36 #include <sys/malloc.h> 37 #include <sys/jail.h> 38 39 #include <machine/../linux/linux.h> 40 #include <compat/linux/linux_mib.h> 41 42 struct linux_prison { 43 char pr_osname[LINUX_MAX_UTSNAME]; 44 char pr_osrelease[LINUX_MAX_UTSNAME]; 45 int pr_oss_version; 46 }; 47 48 SYSCTL_NODE(_compat, OID_AUTO, linux, CTLFLAG_RW, 0, 49 "Linux mode"); 50 51 static char linux_osname[LINUX_MAX_UTSNAME] = "Linux"; 52 53 static int 54 linux_sysctl_osname(SYSCTL_HANDLER_ARGS) 55 { 56 char osname[LINUX_MAX_UTSNAME]; 57 int error; 58 59 strcpy(osname, linux_get_osname(req->p)); 60 error = sysctl_handle_string(oidp, osname, LINUX_MAX_UTSNAME, req); 61 if (error || req->newptr == NULL) 62 return (error); 63 error = linux_set_osname(req->p, osname); 64 return (error); 65 } 66 67 SYSCTL_PROC(_compat_linux, OID_AUTO, osname, 68 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON, 69 0, 0, linux_sysctl_osname, "A", 70 "Linux kernel OS name"); 71 72 static char linux_osrelease[LINUX_MAX_UTSNAME] = "2.4.2"; 73 74 static int 75 linux_sysctl_osrelease(SYSCTL_HANDLER_ARGS) 76 { 77 char osrelease[LINUX_MAX_UTSNAME]; 78 int error; 79 80 strcpy(osrelease, linux_get_osrelease(req->p)); 81 error = sysctl_handle_string(oidp, osrelease, LINUX_MAX_UTSNAME, req); 82 if (error || req->newptr == NULL) 83 return (error); 84 error = linux_set_osrelease(req->p, osrelease); 85 return (error); 86 } 87 88 SYSCTL_PROC(_compat_linux, OID_AUTO, osrelease, 89 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON, 90 0, 0, linux_sysctl_osrelease, "A", 91 "Linux kernel OS release"); 92 93 static int linux_oss_version = 0x030600; 94 95 static int 96 linux_sysctl_oss_version(SYSCTL_HANDLER_ARGS) 97 { 98 int oss_version; 99 int error; 100 101 oss_version = linux_get_oss_version(req->p); 102 error = sysctl_handle_int(oidp, &oss_version, 0, req); 103 if (error || req->newptr == NULL) 104 return (error); 105 error = linux_set_oss_version(req->p, oss_version); 106 return (error); 107 } 108 109 SYSCTL_PROC(_compat_linux, OID_AUTO, oss_version, 110 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_PRISON, 111 0, 0, linux_sysctl_oss_version, "I", 112 "Linux OSS version"); 113 114 static struct linux_prison * 115 get_prison(struct proc *p) 116 { 117 register struct prison *pr; 118 register struct linux_prison *lpr; 119 120 if (!jailed(p->p_ucred)) 121 return (NULL); 122 123 pr = p->p_ucred->cr_prison; 124 125 if (pr->pr_linux == NULL) { 126 MALLOC(lpr, struct linux_prison *, sizeof *lpr, 127 M_PRISON, M_WAITOK|M_ZERO); 128 pr->pr_linux = lpr; 129 } 130 131 return (pr->pr_linux); 132 } 133 134 char * 135 linux_get_osname(p) 136 struct proc *p; 137 { 138 register struct prison *pr; 139 register struct linux_prison *lpr; 140 141 pr = p->p_ucred->cr_prison; 142 if (pr != NULL && pr->pr_linux != NULL) { 143 lpr = pr->pr_linux; 144 if (lpr->pr_osname[0]) 145 return (lpr->pr_osname); 146 } 147 148 return (linux_osname); 149 } 150 151 int 152 linux_set_osname(p, osname) 153 struct proc *p; 154 char *osname; 155 { 156 register struct linux_prison *lpr; 157 158 lpr = get_prison(p); 159 if (lpr != NULL) 160 strcpy(lpr->pr_osname, osname); 161 else 162 strcpy(linux_osname, osname); 163 164 return (0); 165 } 166 167 char * 168 linux_get_osrelease(p) 169 struct proc *p; 170 { 171 register struct prison *pr; 172 register struct linux_prison *lpr; 173 174 pr = p->p_ucred->cr_prison; 175 if (pr != NULL && pr->pr_linux != NULL) { 176 lpr = pr->pr_linux; 177 if (lpr->pr_osrelease[0]) 178 return (lpr->pr_osrelease); 179 } 180 181 return (linux_osrelease); 182 } 183 184 int 185 linux_set_osrelease(p, osrelease) 186 struct proc *p; 187 char *osrelease; 188 { 189 register struct linux_prison *lpr; 190 191 lpr = get_prison(p); 192 if (lpr != NULL) 193 strcpy(lpr->pr_osrelease, osrelease); 194 else 195 strcpy(linux_osrelease, osrelease); 196 197 return (0); 198 } 199 200 int 201 linux_get_oss_version(p) 202 struct proc *p; 203 { 204 register struct prison *pr; 205 register struct linux_prison *lpr; 206 207 pr = p->p_ucred->cr_prison; 208 if (pr != NULL && pr->pr_linux != NULL) { 209 lpr = pr->pr_linux; 210 if (lpr->pr_oss_version) 211 return (lpr->pr_oss_version); 212 } 213 214 return (linux_oss_version); 215 } 216 217 int 218 linux_set_oss_version(p, oss_version) 219 struct proc *p; 220 int oss_version; 221 { 222 register struct linux_prison *lpr; 223 224 lpr = get_prison(p); 225 if (lpr != NULL) 226 lpr->pr_oss_version = oss_version; 227 else 228 linux_oss_version = oss_version; 229 230 return (0); 231 } 232 233 #ifdef DEBUG 234 235 u_char linux_debug_map[howmany(LINUX_SYS_MAXSYSCALL, sizeof(u_char))]; 236 237 static int 238 linux_debug(int syscall, int toggle, int global) 239 { 240 241 if (global) { 242 char c = toggle ? 0 : 0xff; 243 244 memset(linux_debug_map, c, sizeof(linux_debug_map)); 245 return (0); 246 } 247 if (syscall < 0 || syscall >= LINUX_SYS_MAXSYSCALL) 248 return (EINVAL); 249 if (toggle) 250 clrbit(linux_debug_map, syscall); 251 else 252 setbit(linux_debug_map, syscall); 253 return (0); 254 } 255 256 /* 257 * Usage: sysctl -w linux.debug=<syscall_nr>.<0/1> 258 * 259 * E.g.: sysctl -w linux.debug=21.0 260 * 261 * As a special case, syscall "all" will apply to all syscalls globally. 262 */ 263 #define LINUX_MAX_DEBUGSTR 16 264 static int 265 linux_sysctl_debug(SYSCTL_HANDLER_ARGS) 266 { 267 char value[LINUX_MAX_DEBUGSTR], *p; 268 int error, sysc, toggle; 269 int global = 0; 270 271 value[0] = '\0'; 272 error = sysctl_handle_string(oidp, value, LINUX_MAX_DEBUGSTR, req); 273 if (error || req->newptr == NULL) 274 return (error); 275 for (p = value; *p != '\0' && *p != '.'; p++); 276 if (*p == '\0') 277 return (EINVAL); 278 *p++ = '\0'; 279 sysc = strtol(value, NULL, 0); 280 toggle = strtol(p, NULL, 0); 281 if (strcmp(value, "all") == 0) 282 global = 1; 283 error = linux_debug(sysc, toggle, global); 284 return (error); 285 } 286 287 SYSCTL_PROC(_compat_linux, OID_AUTO, debug, 288 CTLTYPE_STRING | CTLFLAG_RW, 289 0, 0, linux_sysctl_debug, "A", 290 "Linux debugging control"); 291 292 #endif /* DEBUG */ 293