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 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 * 25 * Copyright 2014 Nexenta Systems, Inc. All rights reserved. 26 */ 27 28 #include <sys/param.h> 29 #include <sys/types.h> 30 #include <sys/sysmacros.h> 31 #include <sys/inline.h> 32 #include <sys/varargs.h> 33 #include <sys/systm.h> 34 #include <sys/conf.h> 35 #include <sys/cmn_err.h> 36 #include <sys/syslog.h> 37 #include <sys/log.h> 38 #include <sys/proc.h> 39 #include <sys/vnode.h> 40 #include <sys/session.h> 41 #include <sys/stream.h> 42 #include <sys/kmem.h> 43 #include <sys/kobj.h> 44 #include <sys/atomic.h> 45 #include <sys/console.h> 46 #include <sys/cpuvar.h> 47 #include <sys/modctl.h> 48 #include <sys/reboot.h> 49 #include <sys/debug.h> 50 #include <sys/panic.h> 51 #include <sys/spl.h> 52 #include <sys/zone.h> 53 #include <sys/sunddi.h> 54 55 /* 56 * In some debugging situations it's useful to log all messages to panicbuf, 57 * which is persistent across reboots (on most platforms). The range 58 * panicbuf[panicbuf_log..PANICBUFSIZE-1] may be used for this purpose. 59 * By default, panicbuf_log == PANICBUFSIZE and no messages are logged. 60 * To enable panicbuf logging, set panicbuf_log to a small value, say 1K; 61 * this will reserve 1K for panic information and 7K for message logging. 62 */ 63 uint32_t panicbuf_log = PANICBUFSIZE; 64 uint32_t panicbuf_index = PANICBUFSIZE; 65 66 static int aask, aok; 67 static int ce_to_sl[CE_IGNORE] = { SL_NOTE, SL_NOTE, SL_WARN, SL_FATAL }; 68 static char ce_prefix[CE_IGNORE][10] = { "", "NOTICE: ", "WARNING: ", "" }; 69 static char ce_suffix[CE_IGNORE][2] = { "", "\n", "\n", "" }; 70 71 static void 72 cprintf(const char *fmt, va_list adx, int sl, const char *prefix, 73 const char *suffix, void *site, int mid, int sid, int level, 74 zoneid_t zoneid, dev_info_t *dip) 75 { 76 uint32_t msgid; 77 size_t bufsize = LOG_MSGSIZE; 78 char buf[LOG_MSGSIZE]; 79 char *bufp = buf; 80 char *body, *msgp, *bufend; 81 mblk_t *mp; 82 int s, on_intr; 83 size_t len; 84 85 s = splhi(); 86 on_intr = CPU_ON_INTR(CPU) || 87 (interrupts_unleashed && (spltoipl(s) > LOCK_LEVEL)); 88 splx(s); 89 90 ASSERT(zoneid == GLOBAL_ZONEID || !on_intr); 91 92 STRLOG_MAKE_MSGID(fmt, msgid); 93 94 if (strchr("^!?", fmt[0]) != NULL) { 95 if (fmt[0] == '^') 96 sl |= SL_CONSONLY; 97 else if (fmt[0] == '!' || 98 (prefix[0] == '\0' && !(boothowto & RB_VERBOSE))) 99 sl = (sl & ~(SL_USER | SL_NOTE)) | SL_LOGONLY; 100 fmt++; 101 } 102 103 if ((sl & SL_USER) && (MUTEX_HELD(&pidlock) || on_intr)) { 104 zoneid = getzoneid(); 105 sl = sl & ~(SL_USER | SL_LOGONLY) | SL_CONSOLE; 106 } 107 108 retry: 109 bufend = bufp + bufsize; 110 msgp = bufp; 111 body = msgp += snprintf(msgp, bufend - msgp, 112 "%s: [ID %u FACILITY_AND_PRIORITY] ", 113 mod_containing_pc(site), msgid); 114 msgp += snprintf(msgp, bufend - msgp, prefix); 115 if (dip != NULL) 116 msgp += snprintf(msgp, bufend - msgp, "%s%d: ", 117 ddi_driver_name(dip), ddi_get_instance(dip)); 118 msgp += vsnprintf(msgp, bufend - msgp, fmt, adx); 119 msgp += snprintf(msgp, bufend - msgp, suffix); 120 len = strlen(body); 121 122 if (((sl & SL_CONSONLY) && panicstr) || 123 (zoneid == GLOBAL_ZONEID && log_global.lz_active == 0)) { 124 console_printf("%s", body); 125 goto out; 126 } 127 128 if (msgp - bufp >= bufsize && !on_intr) { 129 ASSERT(bufp == buf); 130 bufsize = msgp - bufp + 1; 131 bufp = kmem_alloc(bufsize, KM_NOSLEEP); 132 if (bufp != NULL) 133 goto retry; 134 bufsize = LOG_MSGSIZE; 135 bufp = buf; 136 } 137 138 mp = log_makemsg(mid, sid, level, sl, LOG_KERN, bufp, 139 MIN(bufsize, msgp - bufp + 1), on_intr); 140 if (mp == NULL) { 141 if ((sl & (SL_CONSOLE | SL_LOGONLY)) == SL_CONSOLE && !on_intr) 142 console_printf("%s", body); 143 goto out; 144 } 145 146 if (sl & SL_USER) { 147 ssize_t resid; 148 sess_t *sp; 149 150 if ((sp = tty_hold()) != NULL) { 151 if (sp->s_vp != NULL) 152 (void) vn_rdwr(UIO_WRITE, sp->s_vp, body, 153 len, 0LL, UIO_SYSSPACE, FAPPEND, 154 (rlim64_t)LOG_HIWAT, kcred, &resid); 155 tty_rele(sp); 156 } 157 } 158 159 if (on_intr && !panicstr) { 160 (void) putq(log_intrq, mp); 161 softcall((void (*)(void *))log_flushq, log_intrq); 162 } else { 163 log_sendmsg(mp, zoneid); 164 } 165 out: 166 if (panicbuf_log + len < PANICBUFSIZE) { 167 uint32_t old, new; 168 do { 169 old = panicbuf_index; 170 new = old + len; 171 if (new >= PANICBUFSIZE) 172 new = panicbuf_log + len; 173 } while (atomic_cas_32(&panicbuf_index, old, new) != old); 174 bcopy(body, &panicbuf[new - len], len); 175 } 176 if (bufp != buf) 177 kmem_free(bufp, bufsize); 178 } 179 180 void 181 vzprintf(zoneid_t zoneid, const char *fmt, va_list adx) 182 { 183 cprintf(fmt, adx, SL_CONSOLE | SL_NOTE, "", "", caller(), 0, 0, 0, 184 zoneid, NULL); 185 } 186 187 void 188 vprintf(const char *fmt, va_list adx) 189 { 190 vzprintf(GLOBAL_ZONEID, fmt, adx); 191 } 192 193 /*PRINTFLIKE1*/ 194 void 195 printf(const char *fmt, ...) 196 { 197 va_list adx; 198 199 va_start(adx, fmt); 200 cprintf(fmt, adx, SL_CONSOLE | SL_NOTE, "", "", caller(), 0, 0, 0, 201 GLOBAL_ZONEID, NULL); 202 va_end(adx); 203 } 204 205 /*PRINTFLIKE2*/ 206 void 207 zprintf(zoneid_t zoneid, const char *fmt, ...) 208 { 209 va_list adx; 210 211 va_start(adx, fmt); 212 cprintf(fmt, adx, SL_CONSOLE | SL_NOTE, "", "", caller(), 0, 0, 0, 213 zoneid, NULL); 214 va_end(adx); 215 } 216 217 void 218 vuprintf(const char *fmt, va_list adx) 219 { 220 va_list adxcp; 221 va_copy(adxcp, adx); 222 223 /* Message the user tty, if any, and the global zone syslog */ 224 cprintf(fmt, adx, SL_CONSOLE | SL_LOGONLY | SL_USER | SL_NOTE, 225 "", "", caller(), 0, 0, 0, GLOBAL_ZONEID, NULL); 226 227 /* Now message the local zone syslog */ 228 if (!INGLOBALZONE(curproc)) 229 cprintf(fmt, adxcp, SL_CONSOLE | SL_LOGONLY | SL_NOTE, 230 "", "", caller(), 0, 0, 0, getzoneid(), NULL); 231 232 va_end(adxcp); 233 } 234 235 /*PRINTFLIKE1*/ 236 void 237 uprintf(const char *fmt, ...) 238 { 239 va_list adx; 240 241 va_start(adx, fmt); 242 243 vuprintf(fmt, adx); 244 245 va_end(adx); 246 } 247 248 static void 249 vzdcmn_err(zoneid_t zoneid, int ce, const char *fmt, va_list adx, 250 dev_info_t *dip) 251 { 252 if (ce == CE_PANIC) 253 vpanic(fmt, adx); 254 if ((uint_t)ce < CE_IGNORE) 255 cprintf(fmt, adx, ce_to_sl[ce] | SL_CONSOLE, 256 ce_prefix[ce], ce_suffix[ce], caller(), 0, 0, 0, 257 zoneid, dip); 258 } 259 260 void 261 vzcmn_err(zoneid_t zoneid, int ce, const char *fmt, va_list adx) 262 { 263 vzdcmn_err(zoneid, ce, fmt, adx, NULL); 264 } 265 266 void 267 vcmn_err(int ce, const char *fmt, va_list adx) 268 { 269 vzdcmn_err(GLOBAL_ZONEID, ce, fmt, adx, NULL); 270 } 271 272 /*PRINTFLIKE2*/ 273 void 274 cmn_err(int ce, const char *fmt, ...) 275 { 276 va_list adx; 277 278 va_start(adx, fmt); 279 vzdcmn_err(GLOBAL_ZONEID, ce, fmt, adx, NULL); 280 va_end(adx); 281 } 282 283 /*PRINTFLIKE3*/ 284 void 285 zcmn_err(zoneid_t zoneid, int ce, const char *fmt, ...) 286 { 287 va_list adx; 288 289 va_start(adx, fmt); 290 vzdcmn_err(zoneid, ce, fmt, adx, NULL); 291 va_end(adx); 292 } 293 294 /*PRINTFLIKE3*/ 295 void 296 dev_err(dev_info_t *dip, int ce, char *fmt, ...) 297 { 298 va_list adx; 299 300 va_start(adx, fmt); 301 vzdcmn_err(GLOBAL_ZONEID, ce, fmt, adx, dip); 302 va_end(adx); 303 } 304 305 int 306 assfail(const char *a, const char *f, int l) 307 { 308 if (aask) { 309 printf("ASSERTION CAUGHT: %s, file: %s, line: %d", a, f, l); 310 debug_enter(NULL); 311 } 312 313 if (!aok && !panicstr) 314 panic("assertion failed: %s, file: %s, line: %d", a, f, l); 315 316 return (0); 317 } 318 319 void 320 assfail3(const char *a, uintmax_t lv, const char *op, uintmax_t rv, 321 const char *f, int l) 322 { 323 if (aask) { 324 printf("ASSERTION CAUGHT: %s (0x%llx %s 0x%llx), file: %s, " 325 "line: %d", a, (u_longlong_t)lv, op, (u_longlong_t)rv, 326 f, l); 327 debug_enter(NULL); 328 } 329 330 if (!aok && !panicstr) 331 panic("assertion failed: %s (0x%llx %s 0x%llx), file: %s, " 332 "line: %d", a, (u_longlong_t)lv, op, (u_longlong_t)rv, 333 f, l); 334 } 335 336 int 337 strlog(short mid, short sid, char level, ushort_t sl, char *fmt, ...) 338 { 339 if (sl & log_global.lz_active) { 340 va_list adx; 341 va_start(adx, fmt); 342 cprintf(fmt, adx, sl, "", "", caller(), mid, sid, level, 343 GLOBAL_ZONEID, NULL); 344 va_end(adx); 345 } 346 return (1); 347 } 348 349 int 350 vstrlog(short mid, short sid, char level, ushort_t sl, char *fmt, va_list adx) 351 { 352 if (sl & log_global.lz_active) 353 cprintf(fmt, adx, sl, "", "", caller(), mid, sid, level, 354 GLOBAL_ZONEID, NULL); 355 return (1); 356 } 357