sysmon_wdog.c revision 1.1.2.2
1 1.1.2.2 bouyer /* $NetBSD: sysmon_wdog.c,v 1.1.2.2 2000/11/22 16:04:54 bouyer Exp $ */ 2 1.1.2.2 bouyer 3 1.1.2.2 bouyer /*- 4 1.1.2.2 bouyer * Copyright (c) 2000 Zembu Labs, Inc. 5 1.1.2.2 bouyer * All rights reserved. 6 1.1.2.2 bouyer * 7 1.1.2.2 bouyer * Author: Jason R. Thorpe <thorpej (at) zembu.com> 8 1.1.2.2 bouyer * 9 1.1.2.2 bouyer * Redistribution and use in source and binary forms, with or without 10 1.1.2.2 bouyer * modification, are permitted provided that the following conditions 11 1.1.2.2 bouyer * are met: 12 1.1.2.2 bouyer * 1. Redistributions of source code must retain the above copyright 13 1.1.2.2 bouyer * notice, this list of conditions and the following disclaimer. 14 1.1.2.2 bouyer * 2. Redistributions in binary form must reproduce the above copyright 15 1.1.2.2 bouyer * notice, this list of conditions and the following disclaimer in the 16 1.1.2.2 bouyer * documentation and/or other materials provided with the distribution. 17 1.1.2.2 bouyer * 3. All advertising materials mentioning features or use of this software 18 1.1.2.2 bouyer * must display the following acknowledgement: 19 1.1.2.2 bouyer * This product includes software developed by Zembu Labs, Inc. 20 1.1.2.2 bouyer * 4. Neither the name of Zembu Labs nor the names of its employees may 21 1.1.2.2 bouyer * be used to endorse or promote products derived from this software 22 1.1.2.2 bouyer * without specific prior written permission. 23 1.1.2.2 bouyer * 24 1.1.2.2 bouyer * THIS SOFTWARE IS PROVIDED BY ZEMBU LABS, INC. ``AS IS'' AND ANY EXPRESS 25 1.1.2.2 bouyer * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WAR- 26 1.1.2.2 bouyer * RANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DIS- 27 1.1.2.2 bouyer * CLAIMED. IN NO EVENT SHALL ZEMBU LABS BE LIABLE FOR ANY DIRECT, INDIRECT, 28 1.1.2.2 bouyer * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 29 1.1.2.2 bouyer * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 30 1.1.2.2 bouyer * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 31 1.1.2.2 bouyer * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 32 1.1.2.2 bouyer * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 33 1.1.2.2 bouyer * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 1.1.2.2 bouyer */ 35 1.1.2.2 bouyer 36 1.1.2.2 bouyer /* 37 1.1.2.2 bouyer * Watchdog timer framework for sysmon. Hardware (and software) 38 1.1.2.2 bouyer * watchdog timers can register themselves here to provide a 39 1.1.2.2 bouyer * watchdog function, which provides an abstract interface to the 40 1.1.2.2 bouyer * user. 41 1.1.2.2 bouyer */ 42 1.1.2.2 bouyer 43 1.1.2.2 bouyer #include <sys/param.h> 44 1.1.2.2 bouyer #include <sys/conf.h> 45 1.1.2.2 bouyer #include <sys/errno.h> 46 1.1.2.2 bouyer #include <sys/fcntl.h> 47 1.1.2.2 bouyer #include <sys/lock.h> 48 1.1.2.2 bouyer #include <sys/callout.h> 49 1.1.2.2 bouyer #include <sys/kernel.h> 50 1.1.2.2 bouyer #include <sys/systm.h> 51 1.1.2.2 bouyer #include <sys/proc.h> 52 1.1.2.2 bouyer 53 1.1.2.2 bouyer #include <dev/sysmon/sysmonvar.h> 54 1.1.2.2 bouyer 55 1.1.2.2 bouyer LIST_HEAD(, sysmon_wdog) sysmon_wdog_list = 56 1.1.2.2 bouyer LIST_HEAD_INITIALIZER(&sysmon_wdog_list); 57 1.1.2.2 bouyer int sysmon_wdog_count; 58 1.1.2.2 bouyer struct simplelock sysmon_wdog_list_slock = SIMPLELOCK_INITIALIZER; 59 1.1.2.2 bouyer 60 1.1.2.2 bouyer struct simplelock sysmon_wdog_slock = SIMPLELOCK_INITIALIZER; 61 1.1.2.2 bouyer struct sysmon_wdog *sysmon_armed_wdog; 62 1.1.2.2 bouyer struct callout sysmon_wdog_callout = CALLOUT_INITIALIZER; 63 1.1.2.2 bouyer void *sysmon_wdog_sdhook; 64 1.1.2.2 bouyer 65 1.1.2.2 bouyer #define SYSMON_WDOG_LOCK(s) \ 66 1.1.2.2 bouyer do { \ 67 1.1.2.2 bouyer s = splsoftclock(); \ 68 1.1.2.2 bouyer simple_lock(&sysmon_wdog_slock); \ 69 1.1.2.2 bouyer } while (0) 70 1.1.2.2 bouyer 71 1.1.2.2 bouyer #define SYSMON_WDOG_UNLOCK(s) \ 72 1.1.2.2 bouyer do { \ 73 1.1.2.2 bouyer simple_unlock(&sysmon_wdog_slock); \ 74 1.1.2.2 bouyer splx(s); \ 75 1.1.2.2 bouyer } while (0) 76 1.1.2.2 bouyer 77 1.1.2.2 bouyer struct sysmon_wdog *sysmon_wdog_find(const char *); 78 1.1.2.2 bouyer void sysmon_wdog_release(struct sysmon_wdog *); 79 1.1.2.2 bouyer int sysmon_wdog_setmode(struct sysmon_wdog *, int, u_int); 80 1.1.2.2 bouyer void sysmon_wdog_ktickle(void *); 81 1.1.2.2 bouyer void sysmon_wdog_shutdown(void *); 82 1.1.2.2 bouyer 83 1.1.2.2 bouyer #define SYSMON_MINOR_ENVSYS 0 84 1.1.2.2 bouyer #define SYSMON_MINOR_WDOG 1 85 1.1.2.2 bouyer 86 1.1.2.2 bouyer /* 87 1.1.2.2 bouyer * sysmonopen_wdog: 88 1.1.2.2 bouyer * 89 1.1.2.2 bouyer * Open the system monitor device. 90 1.1.2.2 bouyer */ 91 1.1.2.2 bouyer int 92 1.1.2.2 bouyer sysmonopen_wdog(dev_t dev, int flag, int mode, struct proc *p) 93 1.1.2.2 bouyer { 94 1.1.2.2 bouyer 95 1.1.2.2 bouyer simple_lock(&sysmon_wdog_list_slock); 96 1.1.2.2 bouyer if (sysmon_wdog_sdhook == NULL) { 97 1.1.2.2 bouyer sysmon_wdog_sdhook = 98 1.1.2.2 bouyer shutdownhook_establish(sysmon_wdog_shutdown, NULL); 99 1.1.2.2 bouyer if (sysmon_wdog_sdhook == NULL) 100 1.1.2.2 bouyer printf("WARNING: unable to register watchdog " 101 1.1.2.2 bouyer "shutdown hook\n"); 102 1.1.2.2 bouyer } 103 1.1.2.2 bouyer simple_unlock(&sysmon_wdog_list_slock); 104 1.1.2.2 bouyer 105 1.1.2.2 bouyer return (0); 106 1.1.2.2 bouyer } 107 1.1.2.2 bouyer 108 1.1.2.2 bouyer /* 109 1.1.2.2 bouyer * sysmonclose_wdog: 110 1.1.2.2 bouyer * 111 1.1.2.2 bouyer * Close the system monitor device. 112 1.1.2.2 bouyer */ 113 1.1.2.2 bouyer int 114 1.1.2.2 bouyer sysmonclose_wdog(dev_t dev, int flag, int mode, struct proc *p) 115 1.1.2.2 bouyer { 116 1.1.2.2 bouyer struct sysmon_wdog *smw; 117 1.1.2.2 bouyer int omode, s, error; 118 1.1.2.2 bouyer 119 1.1.2.2 bouyer /* 120 1.1.2.2 bouyer * If this is the last close, and there is a watchdog 121 1.1.2.2 bouyer * running in UTICKLE mode, we need to disable it, 122 1.1.2.2 bouyer * otherwise the system will reset in short order. 123 1.1.2.2 bouyer * 124 1.1.2.2 bouyer * XXX Maybe we should just go into KTICKLE mode? 125 1.1.2.2 bouyer */ 126 1.1.2.2 bouyer SYSMON_WDOG_LOCK(s); 127 1.1.2.2 bouyer if ((smw = sysmon_armed_wdog) != NULL) { 128 1.1.2.2 bouyer if ((omode = smw->smw_mode) == WDOG_MODE_UTICKLE) { 129 1.1.2.2 bouyer error = sysmon_wdog_setmode(smw, 130 1.1.2.2 bouyer WDOG_MODE_DISARMED, smw->smw_period); 131 1.1.2.2 bouyer if (error) { 132 1.1.2.2 bouyer printf("WARNING: UNABLE TO DISARM " 133 1.1.2.2 bouyer "WATCHDOG %s ON CLOSE!\n", 134 1.1.2.2 bouyer smw->smw_name); 135 1.1.2.2 bouyer /* 136 1.1.2.2 bouyer * ...we will probably reboot soon. 137 1.1.2.2 bouyer */ 138 1.1.2.2 bouyer } 139 1.1.2.2 bouyer } 140 1.1.2.2 bouyer } 141 1.1.2.2 bouyer SYSMON_WDOG_UNLOCK(s); 142 1.1.2.2 bouyer 143 1.1.2.2 bouyer return (error); 144 1.1.2.2 bouyer } 145 1.1.2.2 bouyer 146 1.1.2.2 bouyer /* 147 1.1.2.2 bouyer * sysmonioctl_wdog: 148 1.1.2.2 bouyer * 149 1.1.2.2 bouyer * Perform a watchdog control request. 150 1.1.2.2 bouyer */ 151 1.1.2.2 bouyer int 152 1.1.2.2 bouyer sysmonioctl_wdog(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) 153 1.1.2.2 bouyer { 154 1.1.2.2 bouyer struct sysmon_wdog *smw; 155 1.1.2.2 bouyer int s, error = 0; 156 1.1.2.2 bouyer 157 1.1.2.2 bouyer switch (cmd) { 158 1.1.2.2 bouyer case WDOGIOC_GMODE: 159 1.1.2.2 bouyer { 160 1.1.2.2 bouyer struct wdog_mode *wm = (void *) data; 161 1.1.2.2 bouyer 162 1.1.2.2 bouyer wm->wm_name[sizeof(wm->wm_name) - 1] = '\0'; 163 1.1.2.2 bouyer smw = sysmon_wdog_find(wm->wm_name); 164 1.1.2.2 bouyer if (smw == NULL) { 165 1.1.2.2 bouyer error = ESRCH; 166 1.1.2.2 bouyer break; 167 1.1.2.2 bouyer } 168 1.1.2.2 bouyer 169 1.1.2.2 bouyer wm->wm_mode = smw->smw_mode; 170 1.1.2.2 bouyer wm->wm_period = smw->smw_period; 171 1.1.2.2 bouyer sysmon_wdog_release(smw); 172 1.1.2.2 bouyer break; 173 1.1.2.2 bouyer } 174 1.1.2.2 bouyer 175 1.1.2.2 bouyer case WDOGIOC_SMODE: 176 1.1.2.2 bouyer { 177 1.1.2.2 bouyer struct wdog_mode *wm = (void *) data; 178 1.1.2.2 bouyer 179 1.1.2.2 bouyer if ((flag & FWRITE) == 0) { 180 1.1.2.2 bouyer error = EPERM; 181 1.1.2.2 bouyer break; 182 1.1.2.2 bouyer } 183 1.1.2.2 bouyer 184 1.1.2.2 bouyer wm->wm_name[sizeof(wm->wm_name) - 1] = '\0'; 185 1.1.2.2 bouyer smw = sysmon_wdog_find(wm->wm_name); 186 1.1.2.2 bouyer if (smw == NULL) { 187 1.1.2.2 bouyer error = ESRCH; 188 1.1.2.2 bouyer break; 189 1.1.2.2 bouyer } 190 1.1.2.2 bouyer 191 1.1.2.2 bouyer if (wm->wm_mode & ~(WDOG_MODE_MASK|WDOG_FEATURE_MASK)) 192 1.1.2.2 bouyer error = EINVAL; 193 1.1.2.2 bouyer else { 194 1.1.2.2 bouyer SYSMON_WDOG_LOCK(s); 195 1.1.2.2 bouyer error = sysmon_wdog_setmode(smw, wm->wm_mode, 196 1.1.2.2 bouyer wm->wm_period); 197 1.1.2.2 bouyer SYSMON_WDOG_UNLOCK(s); 198 1.1.2.2 bouyer } 199 1.1.2.2 bouyer 200 1.1.2.2 bouyer sysmon_wdog_release(smw); 201 1.1.2.2 bouyer break; 202 1.1.2.2 bouyer } 203 1.1.2.2 bouyer 204 1.1.2.2 bouyer case WDOGIOC_WHICH: 205 1.1.2.2 bouyer { 206 1.1.2.2 bouyer struct wdog_mode *wm = (void *) data; 207 1.1.2.2 bouyer 208 1.1.2.2 bouyer SYSMON_WDOG_LOCK(s); 209 1.1.2.2 bouyer if ((smw = sysmon_armed_wdog) != NULL) { 210 1.1.2.2 bouyer strcpy(wm->wm_name, smw->smw_name); 211 1.1.2.2 bouyer wm->wm_mode = smw->smw_mode; 212 1.1.2.2 bouyer wm->wm_period = smw->smw_period; 213 1.1.2.2 bouyer } else 214 1.1.2.2 bouyer error = ESRCH; 215 1.1.2.2 bouyer SYSMON_WDOG_UNLOCK(s); 216 1.1.2.2 bouyer break; 217 1.1.2.2 bouyer } 218 1.1.2.2 bouyer 219 1.1.2.2 bouyer case WDOGIOC_TICKLE: 220 1.1.2.2 bouyer if ((flag & FWRITE) == 0) { 221 1.1.2.2 bouyer error = EPERM; 222 1.1.2.2 bouyer break; 223 1.1.2.2 bouyer } 224 1.1.2.2 bouyer 225 1.1.2.2 bouyer SYSMON_WDOG_LOCK(s); 226 1.1.2.2 bouyer if ((smw = sysmon_armed_wdog) != NULL) { 227 1.1.2.2 bouyer error = (*smw->smw_tickle)(smw); 228 1.1.2.2 bouyer if (error == 0) 229 1.1.2.2 bouyer smw->smw_tickler = p->p_pid; 230 1.1.2.2 bouyer } else 231 1.1.2.2 bouyer error = ESRCH; 232 1.1.2.2 bouyer SYSMON_WDOG_UNLOCK(s); 233 1.1.2.2 bouyer break; 234 1.1.2.2 bouyer 235 1.1.2.2 bouyer case WDOGIOC_GTICKLER: 236 1.1.2.2 bouyer *(pid_t *)data = smw->smw_tickler; 237 1.1.2.2 bouyer break; 238 1.1.2.2 bouyer 239 1.1.2.2 bouyer case WDOGIOC_GWDOGS: 240 1.1.2.2 bouyer { 241 1.1.2.2 bouyer struct wdog_conf *wc = (void *) data; 242 1.1.2.2 bouyer char *cp; 243 1.1.2.2 bouyer int i; 244 1.1.2.2 bouyer 245 1.1.2.2 bouyer simple_lock(&sysmon_wdog_list_slock); 246 1.1.2.2 bouyer if (wc->wc_names == NULL) 247 1.1.2.2 bouyer wc->wc_count = sysmon_wdog_count; 248 1.1.2.2 bouyer else { 249 1.1.2.2 bouyer for (i = 0, cp = wc->wc_names, 250 1.1.2.2 bouyer smw = LIST_FIRST(&sysmon_wdog_list); 251 1.1.2.2 bouyer i < sysmon_wdog_count && smw != NULL && error == 0; 252 1.1.2.2 bouyer i++, cp += WDOG_NAMESIZE, 253 1.1.2.2 bouyer smw = LIST_NEXT(smw, smw_list)) 254 1.1.2.2 bouyer error = copyout(smw->smw_name, cp, 255 1.1.2.2 bouyer strlen(smw->smw_name) + 1); 256 1.1.2.2 bouyer wc->wc_count = i; 257 1.1.2.2 bouyer } 258 1.1.2.2 bouyer simple_unlock(&sysmon_wdog_list_slock); 259 1.1.2.2 bouyer break; 260 1.1.2.2 bouyer } 261 1.1.2.2 bouyer 262 1.1.2.2 bouyer default: 263 1.1.2.2 bouyer error = ENOTTY; 264 1.1.2.2 bouyer } 265 1.1.2.2 bouyer 266 1.1.2.2 bouyer return (error); 267 1.1.2.2 bouyer } 268 1.1.2.2 bouyer 269 1.1.2.2 bouyer /* 270 1.1.2.2 bouyer * sysmon_wdog_register: 271 1.1.2.2 bouyer * 272 1.1.2.2 bouyer * Register a watchdog device. 273 1.1.2.2 bouyer */ 274 1.1.2.2 bouyer int 275 1.1.2.2 bouyer sysmon_wdog_register(struct sysmon_wdog *smw) 276 1.1.2.2 bouyer { 277 1.1.2.2 bouyer struct sysmon_wdog *lsmw; 278 1.1.2.2 bouyer int error = 0; 279 1.1.2.2 bouyer 280 1.1.2.2 bouyer simple_lock(&sysmon_wdog_list_slock); 281 1.1.2.2 bouyer 282 1.1.2.2 bouyer for (lsmw = LIST_FIRST(&sysmon_wdog_list); lsmw != NULL; 283 1.1.2.2 bouyer lsmw = LIST_NEXT(lsmw, smw_list)) { 284 1.1.2.2 bouyer if (strcmp(lsmw->smw_name, smw->smw_name) == 0) { 285 1.1.2.2 bouyer error = EEXIST; 286 1.1.2.2 bouyer goto out; 287 1.1.2.2 bouyer } 288 1.1.2.2 bouyer } 289 1.1.2.2 bouyer 290 1.1.2.2 bouyer smw->smw_mode = WDOG_MODE_DISARMED; 291 1.1.2.2 bouyer smw->smw_tickler = (pid_t) -1; 292 1.1.2.2 bouyer smw->smw_refcnt = 0; 293 1.1.2.2 bouyer sysmon_wdog_count++; 294 1.1.2.2 bouyer LIST_INSERT_HEAD(&sysmon_wdog_list, smw, smw_list); 295 1.1.2.2 bouyer 296 1.1.2.2 bouyer out: 297 1.1.2.2 bouyer simple_unlock(&sysmon_wdog_list_slock); 298 1.1.2.2 bouyer return (error); 299 1.1.2.2 bouyer } 300 1.1.2.2 bouyer 301 1.1.2.2 bouyer /* 302 1.1.2.2 bouyer * sysmon_wdog_unregister: 303 1.1.2.2 bouyer * 304 1.1.2.2 bouyer * Unregister a watchdog device. 305 1.1.2.2 bouyer */ 306 1.1.2.2 bouyer void 307 1.1.2.2 bouyer sysmon_wdog_unregister(struct sysmon_wdog *smw) 308 1.1.2.2 bouyer { 309 1.1.2.2 bouyer 310 1.1.2.2 bouyer simple_lock(&sysmon_wdog_list_slock); 311 1.1.2.2 bouyer sysmon_wdog_count--; 312 1.1.2.2 bouyer LIST_REMOVE(smw, smw_list); 313 1.1.2.2 bouyer simple_unlock(&sysmon_wdog_list_slock); 314 1.1.2.2 bouyer } 315 1.1.2.2 bouyer 316 1.1.2.2 bouyer /* 317 1.1.2.2 bouyer * sysmon_wdog_find: 318 1.1.2.2 bouyer * 319 1.1.2.2 bouyer * Find a watchdog device. We increase the reference 320 1.1.2.2 bouyer * count on a match. 321 1.1.2.2 bouyer */ 322 1.1.2.2 bouyer struct sysmon_wdog * 323 1.1.2.2 bouyer sysmon_wdog_find(const char *name) 324 1.1.2.2 bouyer { 325 1.1.2.2 bouyer struct sysmon_wdog *smw; 326 1.1.2.2 bouyer 327 1.1.2.2 bouyer simple_lock(&sysmon_wdog_list_slock); 328 1.1.2.2 bouyer 329 1.1.2.2 bouyer for (smw = LIST_FIRST(&sysmon_wdog_list); smw != NULL; 330 1.1.2.2 bouyer smw = LIST_NEXT(smw, smw_list)) { 331 1.1.2.2 bouyer if (strcmp(smw->smw_name, name) == 0) 332 1.1.2.2 bouyer break; 333 1.1.2.2 bouyer } 334 1.1.2.2 bouyer 335 1.1.2.2 bouyer if (smw != NULL) 336 1.1.2.2 bouyer smw->smw_refcnt++; 337 1.1.2.2 bouyer 338 1.1.2.2 bouyer simple_unlock(&sysmon_wdog_list_slock); 339 1.1.2.2 bouyer return (smw); 340 1.1.2.2 bouyer } 341 1.1.2.2 bouyer 342 1.1.2.2 bouyer /* 343 1.1.2.2 bouyer * sysmon_wdog_release: 344 1.1.2.2 bouyer * 345 1.1.2.2 bouyer * Release a watchdog device. 346 1.1.2.2 bouyer */ 347 1.1.2.2 bouyer void 348 1.1.2.2 bouyer sysmon_wdog_release(struct sysmon_wdog *smw) 349 1.1.2.2 bouyer { 350 1.1.2.2 bouyer 351 1.1.2.2 bouyer simple_lock(&sysmon_wdog_list_slock); 352 1.1.2.2 bouyer KASSERT(smw->smw_refcnt != 0); 353 1.1.2.2 bouyer smw->smw_refcnt--; 354 1.1.2.2 bouyer simple_unlock(&sysmon_wdog_list_slock); 355 1.1.2.2 bouyer } 356 1.1.2.2 bouyer 357 1.1.2.2 bouyer /* 358 1.1.2.2 bouyer * sysmon_wdog_setmode: 359 1.1.2.2 bouyer * 360 1.1.2.2 bouyer * Set the mode of a watchdog device. 361 1.1.2.2 bouyer */ 362 1.1.2.2 bouyer int 363 1.1.2.2 bouyer sysmon_wdog_setmode(struct sysmon_wdog *smw, int mode, u_int period) 364 1.1.2.2 bouyer { 365 1.1.2.2 bouyer u_int operiod = smw->smw_period; 366 1.1.2.2 bouyer int omode = smw->smw_mode; 367 1.1.2.2 bouyer int error = 0; 368 1.1.2.2 bouyer 369 1.1.2.2 bouyer smw->smw_period = period; 370 1.1.2.2 bouyer smw->smw_mode = mode; 371 1.1.2.2 bouyer 372 1.1.2.2 bouyer switch (mode & WDOG_MODE_MASK) { 373 1.1.2.2 bouyer case WDOG_MODE_DISARMED: 374 1.1.2.2 bouyer if (smw != sysmon_armed_wdog) { 375 1.1.2.2 bouyer error = EINVAL; 376 1.1.2.2 bouyer goto out; 377 1.1.2.2 bouyer } 378 1.1.2.2 bouyer break; 379 1.1.2.2 bouyer 380 1.1.2.2 bouyer case WDOG_MODE_KTICKLE: 381 1.1.2.2 bouyer case WDOG_MODE_UTICKLE: 382 1.1.2.2 bouyer if (sysmon_armed_wdog != NULL) { 383 1.1.2.2 bouyer error = EBUSY; 384 1.1.2.2 bouyer goto out; 385 1.1.2.2 bouyer } 386 1.1.2.2 bouyer break; 387 1.1.2.2 bouyer 388 1.1.2.2 bouyer default: 389 1.1.2.2 bouyer error = EINVAL; 390 1.1.2.2 bouyer goto out; 391 1.1.2.2 bouyer } 392 1.1.2.2 bouyer 393 1.1.2.2 bouyer error = (*smw->smw_setmode)(smw); 394 1.1.2.2 bouyer 395 1.1.2.2 bouyer out: 396 1.1.2.2 bouyer if (error) { 397 1.1.2.2 bouyer smw->smw_period = operiod; 398 1.1.2.2 bouyer smw->smw_mode = omode; 399 1.1.2.2 bouyer } else { 400 1.1.2.2 bouyer if ((mode & WDOG_MODE_MASK) == WDOG_MODE_DISARMED) { 401 1.1.2.2 bouyer smw->smw_tickler = (pid_t) -1; 402 1.1.2.2 bouyer smw->smw_refcnt--; 403 1.1.2.2 bouyer if ((omode & WDOG_MODE_MASK) == WDOG_MODE_KTICKLE) 404 1.1.2.2 bouyer callout_stop(&sysmon_wdog_callout); 405 1.1.2.2 bouyer } else { 406 1.1.2.2 bouyer sysmon_armed_wdog = smw; 407 1.1.2.2 bouyer smw->smw_refcnt++; 408 1.1.2.2 bouyer if ((mode & WDOG_MODE_MASK) == WDOG_MODE_KTICKLE) { 409 1.1.2.2 bouyer callout_reset(&sysmon_wdog_callout, 410 1.1.2.2 bouyer WDOG_PERIOD_TO_TICKS(smw->smw_period) / 2, 411 1.1.2.2 bouyer sysmon_wdog_ktickle, NULL); 412 1.1.2.2 bouyer } 413 1.1.2.2 bouyer } 414 1.1.2.2 bouyer } 415 1.1.2.2 bouyer return (error); 416 1.1.2.2 bouyer } 417 1.1.2.2 bouyer 418 1.1.2.2 bouyer /* 419 1.1.2.2 bouyer * sysmon_wdog_ktickle: 420 1.1.2.2 bouyer * 421 1.1.2.2 bouyer * Kernel watchdog tickle routine. 422 1.1.2.2 bouyer */ 423 1.1.2.2 bouyer void 424 1.1.2.2 bouyer sysmon_wdog_ktickle(void *arg) 425 1.1.2.2 bouyer { 426 1.1.2.2 bouyer struct sysmon_wdog *smw; 427 1.1.2.2 bouyer int s; 428 1.1.2.2 bouyer 429 1.1.2.2 bouyer SYSMON_WDOG_LOCK(s); 430 1.1.2.2 bouyer if ((smw = sysmon_armed_wdog) != NULL) { 431 1.1.2.2 bouyer if ((*smw->smw_tickle)(smw) != 0) { 432 1.1.2.2 bouyer printf("WARNING: KERNEL TICKLE OF WATCHDOG %s " 433 1.1.2.2 bouyer "FAILED!\n", smw->smw_name); 434 1.1.2.2 bouyer /* 435 1.1.2.2 bouyer * ...we will probably reboot soon. 436 1.1.2.2 bouyer */ 437 1.1.2.2 bouyer } 438 1.1.2.2 bouyer callout_reset(&sysmon_wdog_callout, 439 1.1.2.2 bouyer WDOG_PERIOD_TO_TICKS(smw->smw_period) / 2, 440 1.1.2.2 bouyer sysmon_wdog_ktickle, NULL); 441 1.1.2.2 bouyer } 442 1.1.2.2 bouyer SYSMON_WDOG_UNLOCK(s); 443 1.1.2.2 bouyer } 444 1.1.2.2 bouyer 445 1.1.2.2 bouyer /* 446 1.1.2.2 bouyer * sysmon_wdog_shutdown: 447 1.1.2.2 bouyer * 448 1.1.2.2 bouyer * Perform shutdown-time operations. 449 1.1.2.2 bouyer */ 450 1.1.2.2 bouyer void 451 1.1.2.2 bouyer sysmon_wdog_shutdown(void *arg) 452 1.1.2.2 bouyer { 453 1.1.2.2 bouyer struct sysmon_wdog *smw; 454 1.1.2.2 bouyer 455 1.1.2.2 bouyer /* 456 1.1.2.2 bouyer * XXX Locking here? I don't think it's necessary. 457 1.1.2.2 bouyer */ 458 1.1.2.2 bouyer 459 1.1.2.2 bouyer if ((smw = sysmon_armed_wdog) != NULL) { 460 1.1.2.2 bouyer if (sysmon_wdog_setmode(smw, WDOG_MODE_DISARMED, 461 1.1.2.2 bouyer smw->smw_period)) 462 1.1.2.2 bouyer printf("WARNING: FAILED TO SHUTDOWN WATCHDOG %s!\n", 463 1.1.2.2 bouyer smw->smw_name); 464 1.1.2.2 bouyer } 465 1.1.2.2 bouyer } 466
Indexes created Wed Oct 01 19:09:53 GMT 2025