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 2006 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #pragma ident "%Z%%M% %I% %E% SMI" 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 54 /* 55 * In some debugging situations it's useful to log all messages to panicbuf, 56 * which is persistent across reboots (on most platforms). The range 57 * panicbuf[panicbuf_log..PANICBUFSIZE-1] may be used for this purpose. 58 * By default, panicbuf_log == PANICBUFSIZE and no messages are logged. 59 * To enable panicbuf logging, set panicbuf_log to a small value, say 1K; 60 * this will reserve 1K for panic information and 7K for message logging. 61 */ 62 uint32_t panicbuf_log = PANICBUFSIZE; 63 uint32_t panicbuf_index = PANICBUFSIZE; 64 65 static int aask, aok; 66 static int ce_to_sl[CE_IGNORE] = { SL_NOTE, SL_NOTE, SL_WARN, SL_FATAL }; 67 static char ce_prefix[CE_IGNORE][10] = { "", "NOTICE: ", "WARNING: ", "" }; 68 static char ce_suffix[CE_IGNORE][2] = { "", "\n", "\n", "" }; 69 70 static void 71 cprintf(const char *fmt, va_list adx, int sl, const char *prefix, 72 const char *suffix, void *site, int mid, int sid, int level, 73 zoneid_t zoneid) 74 { 75 uint32_t msgid; 76 size_t bufsize = LOG_MSGSIZE; 77 char buf[LOG_MSGSIZE]; 78 char *bufp = buf; 79 char *body, *msgp, *bufend; 80 mblk_t *mp; 81 int s, on_intr; 82 size_t len; 83 84 s = splhi(); 85 on_intr = CPU_ON_INTR(CPU) || 86 (interrupts_unleashed && (spltoipl(s) > LOCK_LEVEL)); 87 splx(s); 88 89 ASSERT(zoneid == GLOBAL_ZONEID || !on_intr); 90 91 STRLOG_MAKE_MSGID(fmt, msgid); 92 93 if (strchr("^!?", fmt[0]) != NULL) { 94 if (fmt[0] == '^') 95 sl |= SL_CONSONLY; 96 else if (fmt[0] == '!' || 97 (prefix[0] == '\0' && !(boothowto & RB_VERBOSE))) 98 sl = (sl & ~(SL_USER | SL_NOTE)) | SL_LOGONLY; 99 fmt++; 100 } 101 102 if ((sl & SL_USER) && (MUTEX_HELD(&pidlock) || on_intr)) { 103 zoneid = getzoneid(); 104 sl = sl & ~(SL_USER | SL_LOGONLY) | SL_CONSOLE; 105 } 106 107 retry: 108 bufend = bufp + bufsize; 109 msgp = bufp; 110 body = msgp += snprintf(msgp, bufend - msgp, 111 "%s: [ID %u FACILITY_AND_PRIORITY] ", 112 mod_containing_pc(site), msgid); 113 msgp += snprintf(msgp, bufend - msgp, prefix); 114 msgp += vsnprintf(msgp, bufend - msgp, fmt, adx); 115 msgp += snprintf(msgp, bufend - msgp, suffix); 116 len = strlen(body); 117 118 if (((sl & SL_CONSONLY) && panicstr) || 119 (zoneid == GLOBAL_ZONEID && log_global.lz_active == 0)) { 120 console_printf("%s", body); 121 goto out; 122 } 123 124 if (msgp - bufp >= bufsize && !on_intr) { 125 ASSERT(bufp == buf); 126 bufsize = msgp - bufp + 1; 127 bufp = kmem_alloc(bufsize, KM_NOSLEEP); 128 if (bufp != NULL) 129 goto retry; 130 bufsize = LOG_MSGSIZE; 131 bufp = buf; 132 } 133 134 mp = log_makemsg(mid, sid, level, sl, LOG_KERN, bufp, 135 MIN(bufsize, msgp - bufp + 1), on_intr); 136 if (mp == NULL) { 137 if ((sl & (SL_CONSOLE | SL_LOGONLY)) == SL_CONSOLE && !on_intr) 138 console_printf("%s", body); 139 goto out; 140 } 141 142 if (sl & SL_USER) { 143 ssize_t resid; 144 sess_t *sp; 145 146 if ((sp = tty_hold()) != NULL) { 147 if (sp->s_vp != NULL) 148 (void) vn_rdwr(UIO_WRITE, sp->s_vp, body, 149 len, 0LL, UIO_SYSSPACE, FAPPEND, 150 (rlim64_t)LOG_HIWAT, kcred, &resid); 151 tty_rele(sp); 152 } 153 } 154 155 if (on_intr && !panicstr) { 156 (void) putq(log_intrq, mp); 157 softcall((void (*)(void *))log_flushq, log_intrq); 158 } else { 159 log_sendmsg(mp, zoneid); 160 } 161 out: 162 if (panicbuf_log + len < PANICBUFSIZE) { 163 uint32_t old, new; 164 do { 165 old = panicbuf_index; 166 new = old + len; 167 if (new >= PANICBUFSIZE) 168 new = panicbuf_log + len; 169 } while (cas32(&panicbuf_index, old, new) != old); 170 bcopy(body, &panicbuf[new - len], len); 171 } 172 if (bufp != buf) 173 kmem_free(bufp, bufsize); 174 } 175 176 void 177 vzprintf(zoneid_t zoneid, const char *fmt, va_list adx) 178 { 179 cprintf(fmt, adx, SL_CONSOLE | SL_NOTE, "", "", caller(), 0, 0, 0, 180 zoneid); 181 } 182 183 void 184 vprintf(const char *fmt, va_list adx) 185 { 186 vzprintf(GLOBAL_ZONEID, fmt, adx); 187 } 188 189 /*PRINTFLIKE1*/ 190 void 191 printf(const char *fmt, ...) 192 { 193 va_list adx; 194 195 va_start(adx, fmt); 196 cprintf(fmt, adx, SL_CONSOLE | SL_NOTE, "", "", caller(), 0, 0, 0, 197 GLOBAL_ZONEID); 198 va_end(adx); 199 } 200 201 /*PRINTFLIKE2*/ 202 void 203 zprintf(zoneid_t zoneid, const char *fmt, ...) 204 { 205 va_list adx; 206 207 va_start(adx, fmt); 208 cprintf(fmt, adx, SL_CONSOLE | SL_NOTE, "", "", caller(), 0, 0, 0, 209 zoneid); 210 va_end(adx); 211 } 212 213 void 214 vuprintf(const char *fmt, va_list adx) 215 { 216 cprintf(fmt, adx, SL_CONSOLE | SL_LOGONLY | SL_USER | SL_NOTE, 217 "", "", caller(), 0, 0, 0, GLOBAL_ZONEID); 218 } 219 220 /*PRINTFLIKE1*/ 221 void 222 uprintf(const char *fmt, ...) 223 { 224 va_list adx; 225 226 va_start(adx, fmt); 227 cprintf(fmt, adx, SL_CONSOLE | SL_LOGONLY | SL_USER | SL_NOTE, 228 "", "", caller(), 0, 0, 0, GLOBAL_ZONEID); 229 va_end(adx); 230 } 231 232 void 233 vzcmn_err(zoneid_t zoneid, int ce, const char *fmt, va_list adx) 234 { 235 if (ce == CE_PANIC) 236 vpanic(fmt, adx); 237 if ((uint_t)ce < CE_IGNORE) 238 cprintf(fmt, adx, ce_to_sl[ce] | SL_CONSOLE, 239 ce_prefix[ce], ce_suffix[ce], caller(), 0, 0, 0, 240 zoneid); 241 } 242 243 void 244 vcmn_err(int ce, const char *fmt, va_list adx) 245 { 246 vzcmn_err(GLOBAL_ZONEID, ce, fmt, adx); 247 } 248 249 /*PRINTFLIKE2*/ 250 void 251 cmn_err(int ce, const char *fmt, ...) 252 { 253 va_list adx; 254 255 va_start(adx, fmt); 256 if (ce == CE_PANIC) 257 vpanic(fmt, adx); 258 if ((uint_t)ce < CE_IGNORE) 259 cprintf(fmt, adx, ce_to_sl[ce] | SL_CONSOLE, 260 ce_prefix[ce], ce_suffix[ce], caller(), 0, 0, 0, 261 GLOBAL_ZONEID); 262 va_end(adx); 263 } 264 265 /*PRINTFLIKE3*/ 266 void 267 zcmn_err(zoneid_t zoneid, int ce, const char *fmt, ...) 268 { 269 va_list adx; 270 271 va_start(adx, fmt); 272 if (ce == CE_PANIC) 273 vpanic(fmt, adx); 274 if ((uint_t)ce < CE_IGNORE) 275 cprintf(fmt, adx, ce_to_sl[ce] | SL_CONSOLE, ce_prefix[ce], 276 ce_suffix[ce], caller(), 0, 0, 0, zoneid); 277 va_end(adx); 278 } 279 280 int 281 assfail(const char *a, const char *f, int l) 282 { 283 if (aask) { 284 printf("ASSERTION CAUGHT: %s, file: %s, line: %d", a, f, l); 285 debug_enter(NULL); 286 } 287 288 if (!aok && !panicstr) 289 panic("assertion failed: %s, file: %s, line: %d", a, f, l); 290 291 return (0); 292 } 293 294 void 295 assfail3(const char *a, uintmax_t lv, const char *op, uintmax_t rv, 296 const char *f, int l) 297 { 298 if (aask) { 299 printf("ASSERTION CAUGHT: %s (0x%llx %s 0x%llx), file: %s, " 300 "line: %d", a, (u_longlong_t)lv, op, (u_longlong_t)rv, 301 f, l); 302 debug_enter(NULL); 303 } 304 305 if (!aok && !panicstr) 306 panic("assertion failed: %s (0x%llx %s 0x%llx), file: %s, " 307 "line: %d", a, (u_longlong_t)lv, op, (u_longlong_t)rv, 308 f, l); 309 } 310 311 int 312 strlog(short mid, short sid, char level, ushort_t sl, char *fmt, ...) 313 { 314 if (sl & log_global.lz_active) { 315 va_list adx; 316 va_start(adx, fmt); 317 cprintf(fmt, adx, sl, "", "", caller(), mid, sid, level, 318 GLOBAL_ZONEID); 319 va_end(adx); 320 } 321 return (1); 322 } 323 324 int 325 vstrlog(short mid, short sid, char level, ushort_t sl, char *fmt, va_list adx) 326 { 327 if (sl & log_global.lz_active) 328 cprintf(fmt, adx, sl, "", "", caller(), mid, sid, level, 329 GLOBAL_ZONEID); 330 return (1); 331 } 332