1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 * 26 * Copyright 2015 Nexenta Systems, Inc. All rights reserved. 27 * Copyright 2016 Joyent, Inc. 28 */ 29 30 #include <sys/param.h> 31 #include <sys/types.h> 32 #include <sys/sysmacros.h> 33 #include <sys/inline.h> 34 #include <sys/varargs.h> 35 #include <sys/systm.h> 36 #include <sys/conf.h> 37 #include <sys/cmn_err.h> 38 #include <sys/syslog.h> 39 #include <sys/log.h> 40 #include <sys/proc.h> 41 #include <sys/vnode.h> 42 #include <sys/session.h> 43 #include <sys/stream.h> 44 #include <sys/kmem.h> 45 #include <sys/kobj.h> 46 #include <sys/atomic.h> 47 #include <sys/console.h> 48 #include <sys/cpuvar.h> 49 #include <sys/modctl.h> 50 #include <sys/reboot.h> 51 #include <sys/debug.h> 52 #include <sys/panic.h> 53 #include <sys/spl.h> 54 #include <sys/zone.h> 55 #include <sys/sunddi.h> 56 57 /* 58 * In some debugging situations it's useful to log all messages to panicbuf, 59 * which is persistent across reboots (on most platforms). The range 60 * panicbuf[panicbuf_log..PANICBUFSIZE-1] may be used for this purpose. 61 * By default, panicbuf_log == PANICBUFSIZE and no messages are logged. 62 * To enable panicbuf logging, set panicbuf_log to a small value, say 1K; 63 * this will reserve 1K for panic information and 7K for message logging. 64 */ 65 uint32_t panicbuf_log = PANICBUFSIZE; 66 uint32_t panicbuf_index = PANICBUFSIZE; 67 68 int aask, aok; 69 static int ce_to_sl[CE_IGNORE] = { SL_NOTE, SL_NOTE, SL_WARN, SL_FATAL }; 70 static char ce_prefix[CE_IGNORE][10] = { "", "NOTICE: ", "WARNING: ", "" }; 71 static char ce_suffix[CE_IGNORE][2] = { "", "\n", "\n", "" }; 72 73 static void 74 cprintf(const char *fmt, va_list adx, int sl, const char *prefix, 75 const char *suffix, void *site, int mid, int sid, int level, 76 zoneid_t zoneid, dev_info_t *dip) 77 { 78 uint32_t msgid; 79 size_t bufsize = LOG_MSGSIZE; 80 char buf[LOG_MSGSIZE]; 81 char *bufp = buf; 82 char *body, *msgp, *bufend; 83 mblk_t *mp; 84 int s, on_intr; 85 size_t len; 86 87 s = splhi(); 88 on_intr = CPU_ON_INTR(CPU) || 89 (interrupts_unleashed && (spltoipl(s) > LOCK_LEVEL)); 90 splx(s); 91 92 ASSERT(zoneid == GLOBAL_ZONEID || !on_intr); 93 94 STRLOG_MAKE_MSGID(fmt, msgid); 95 96 if (strchr("^!?", fmt[0]) != NULL) { 97 if (fmt[0] == '^') 98 sl |= SL_CONSONLY; 99 else if (fmt[0] == '!' || 100 (prefix[0] == '\0' && !(boothowto & RB_VERBOSE))) 101 sl = (sl & ~(SL_USER | SL_NOTE)) | SL_LOGONLY; 102 fmt++; 103 } 104 105 if ((sl & SL_USER) && (MUTEX_HELD(&pidlock) || on_intr)) { 106 zoneid = getzoneid(); 107 sl = sl & ~(SL_USER | SL_LOGONLY) | SL_CONSOLE; 108 } 109 110 retry: 111 bufend = bufp + bufsize; 112 msgp = bufp; 113 body = msgp += snprintf(msgp, bufend - msgp, 114 "%s: [ID %u FACILITY_AND_PRIORITY] ", 115 mod_containing_pc(site), msgid); 116 msgp += snprintf(msgp, bufend - msgp, prefix); 117 if (dip != NULL) 118 msgp += snprintf(msgp, bufend - msgp, "%s%d: ", 119 ddi_driver_name(dip), ddi_get_instance(dip)); 120 msgp += vsnprintf(msgp, bufend - msgp, fmt, adx); 121 msgp += snprintf(msgp, bufend - msgp, suffix); 122 len = strlen(body); 123 124 if (((sl & SL_CONSONLY) && panicstr) || 125 (zoneid == GLOBAL_ZONEID && log_global.lz_active == 0)) { 126 console_printf("%s", body); 127 goto out; 128 } 129 130 if (msgp - bufp >= bufsize && !on_intr) { 131 ASSERT(bufp == buf); 132 bufsize = msgp - bufp + 1; 133 bufp = kmem_alloc(bufsize, KM_NOSLEEP); 134 if (bufp != NULL) 135 goto retry; 136 bufsize = LOG_MSGSIZE; 137 bufp = buf; 138 } 139 140 mp = log_makemsg(mid, sid, level, sl, LOG_KERN, bufp, 141 MIN(bufsize, msgp - bufp + 1), on_intr); 142 if (mp == NULL) { 143 if ((sl & (SL_CONSOLE | SL_LOGONLY)) == SL_CONSOLE && !on_intr) 144 console_printf("%s", body); 145 goto out; 146 } 147 148 if (sl & SL_USER) { 149 ssize_t resid; 150 sess_t *sp; 151 152 if ((sp = tty_hold()) != NULL) { 153 if (sp->s_vp != NULL) 154 (void) vn_rdwr(UIO_WRITE, sp->s_vp, body, 155 len, 0LL, UIO_SYSSPACE, FAPPEND, 156 (rlim64_t)LOG_HIWAT, kcred, &resid); 157 tty_rele(sp); 158 } 159 } 160 161 if (on_intr && !panicstr) { 162 (void) putq(log_intrq, mp); 163 softcall((void (*)(void *))log_flushq, log_intrq); 164 } else { 165 log_sendmsg(mp, zoneid); 166 } 167 out: 168 if (panicbuf_log + len < PANICBUFSIZE) { 169 uint32_t old, new; 170 do { 171 old = panicbuf_index; 172 new = old + len; 173 if (new >= PANICBUFSIZE) 174 new = panicbuf_log + len; 175 } while (atomic_cas_32(&panicbuf_index, old, new) != old); 176 bcopy(body, &panicbuf[new - len], len); 177 } 178 if (bufp != buf) 179 kmem_free(bufp, bufsize); 180 } 181 182 void 183 vzprintf(zoneid_t zoneid, const char *fmt, va_list adx) 184 { 185 cprintf(fmt, adx, SL_CONSOLE | SL_NOTE, "", "", caller(), 0, 0, 0, 186 zoneid, NULL); 187 } 188 189 void 190 vprintf(const char *fmt, va_list adx) 191 { 192 vzprintf(GLOBAL_ZONEID, fmt, adx); 193 } 194 195 /*PRINTFLIKE1*/ 196 void 197 printf(const char *fmt, ...) 198 { 199 va_list adx; 200 201 va_start(adx, fmt); 202 cprintf(fmt, adx, SL_CONSOLE | SL_NOTE, "", "", caller(), 0, 0, 0, 203 GLOBAL_ZONEID, NULL); 204 va_end(adx); 205 } 206 207 /*PRINTFLIKE2*/ 208 void 209 zprintf(zoneid_t zoneid, const char *fmt, ...) 210 { 211 va_list adx; 212 213 va_start(adx, fmt); 214 cprintf(fmt, adx, SL_CONSOLE | SL_NOTE, "", "", caller(), 0, 0, 0, 215 zoneid, NULL); 216 va_end(adx); 217 } 218 219 void 220 vuprintf(const char *fmt, va_list adx) 221 { 222 va_list adxcp; 223 va_copy(adxcp, adx); 224 225 /* Message the user tty, if any, and the global zone syslog */ 226 cprintf(fmt, adx, SL_CONSOLE | SL_LOGONLY | SL_USER | SL_NOTE, 227 "", "", caller(), 0, 0, 0, GLOBAL_ZONEID, NULL); 228 229 /* Now message the local zone syslog */ 230 if (!INGLOBALZONE(curproc)) 231 cprintf(fmt, adxcp, SL_CONSOLE | SL_LOGONLY | SL_NOTE, 232 "", "", caller(), 0, 0, 0, getzoneid(), NULL); 233 234 va_end(adxcp); 235 } 236 237 /*PRINTFLIKE1*/ 238 void 239 uprintf(const char *fmt, ...) 240 { 241 va_list adx; 242 243 va_start(adx, fmt); 244 245 vuprintf(fmt, adx); 246 247 va_end(adx); 248 } 249 250 static void 251 vzdcmn_err(zoneid_t zoneid, void *site, int ce, const char *fmt, va_list adx, 252 dev_info_t *dip) 253 { 254 if (ce == CE_PANIC) 255 vpanic(fmt, adx); 256 if ((uint_t)ce < CE_IGNORE) { 257 cprintf(fmt, adx, ce_to_sl[ce] | SL_CONSOLE, 258 ce_prefix[ce], ce_suffix[ce], site, 0, 0, 0, 259 zoneid, dip); 260 } 261 } 262 263 void 264 vzcmn_err(zoneid_t zoneid, int ce, const char *fmt, va_list adx) 265 { 266 vzdcmn_err(zoneid, caller(), ce, fmt, adx, NULL); 267 } 268 269 void 270 vcmn_err(int ce, const char *fmt, va_list adx) 271 { 272 vzdcmn_err(GLOBAL_ZONEID, caller(), ce, fmt, adx, NULL); 273 } 274 275 /*PRINTFLIKE3*/ 276 void 277 vdev_err(dev_info_t *dip, int ce, const char *fmt, va_list adx) 278 { 279 vzdcmn_err(GLOBAL_ZONEID, caller(), ce, fmt, adx, dip); 280 } 281 282 /*PRINTFLIKE2*/ 283 void 284 cmn_err(int ce, const char *fmt, ...) 285 { 286 va_list adx; 287 288 va_start(adx, fmt); 289 vzdcmn_err(GLOBAL_ZONEID, caller(), ce, fmt, adx, NULL); 290 va_end(adx); 291 } 292 293 /*PRINTFLIKE3*/ 294 void 295 zcmn_err(zoneid_t zoneid, int ce, const char *fmt, ...) 296 { 297 va_list adx; 298 299 va_start(adx, fmt); 300 vzdcmn_err(zoneid, caller(), ce, fmt, adx, NULL); 301 va_end(adx); 302 } 303 304 /*PRINTFLIKE3*/ 305 void 306 dev_err(dev_info_t *dip, int ce, char *fmt, ...) 307 { 308 va_list adx; 309 310 va_start(adx, fmt); 311 vzdcmn_err(GLOBAL_ZONEID, caller(), ce, fmt, adx, dip); 312 va_end(adx); 313 } 314 315 int 316 assfail(const char *a, const char *f, int l) 317 { 318 if (aask) { 319 printf("ASSERTION CAUGHT: %s, file: %s, line: %d", a, f, l); 320 debug_enter(NULL); 321 } 322 323 if (!aok && !panicstr) 324 panic("assertion failed: %s, file: %s, line: %d", a, f, l); 325 326 return (0); 327 } 328 329 void 330 assfail3(const char *a, uintmax_t lv, const char *op, uintmax_t rv, 331 const char *f, int l) 332 { 333 if (aask) { 334 printf("ASSERTION CAUGHT: %s (0x%llx %s 0x%llx), file: %s, " 335 "line: %d", a, (u_longlong_t)lv, op, (u_longlong_t)rv, 336 f, l); 337 debug_enter(NULL); 338 } 339 340 if (!aok && !panicstr) 341 panic("assertion failed: %s (0x%llx %s 0x%llx), file: %s, " 342 "line: %d", a, (u_longlong_t)lv, op, (u_longlong_t)rv, 343 f, l); 344 } 345 346 int 347 strlog(short mid, short sid, char level, ushort_t sl, char *fmt, ...) 348 { 349 if (sl & log_global.lz_active) { 350 va_list adx; 351 va_start(adx, fmt); 352 cprintf(fmt, adx, sl, "", "", caller(), mid, sid, level, 353 GLOBAL_ZONEID, NULL); 354 va_end(adx); 355 } 356 return (1); 357 } 358 359 int 360 vstrlog(short mid, short sid, char level, ushort_t sl, char *fmt, va_list adx) 361 { 362 if (sl & log_global.lz_active) 363 cprintf(fmt, adx, sl, "", "", caller(), mid, sid, level, 364 GLOBAL_ZONEID, NULL); 365 return (1); 366 } 367