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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2003 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include <sys/param.h> 30 #include <sys/types.h> 31 #include <sys/sysmacros.h> 32 #include <sys/inline.h> 33 #include <sys/varargs.h> 34 #include <sys/systm.h> 35 #include <sys/conf.h> 36 #include <sys/cmn_err.h> 37 #include <sys/syslog.h> 38 #include <sys/log.h> 39 #include <sys/proc.h> 40 #include <sys/vnode.h> 41 #include <sys/session.h> 42 #include <sys/stream.h> 43 #include <sys/kmem.h> 44 #include <sys/kobj.h> 45 #include <sys/atomic.h> 46 #include <sys/console.h> 47 #include <sys/cpuvar.h> 48 #include <sys/modctl.h> 49 #include <sys/reboot.h> 50 #include <sys/debug.h> 51 #include <sys/panic.h> 52 #include <sys/spl.h> 53 #include <sys/zone.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) 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 msgp += vsnprintf(msgp, bufend - msgp, fmt, adx); 116 msgp += snprintf(msgp, bufend - msgp, suffix); 117 len = strlen(body); 118 119 if (((sl & SL_CONSONLY) && panicstr) || 120 (zoneid == GLOBAL_ZONEID && log_global.lz_active == 0)) { 121 console_printf("%s", body); 122 goto out; 123 } 124 125 if (msgp - bufp >= bufsize && !on_intr) { 126 ASSERT(bufp == buf); 127 bufsize = msgp - bufp + 1; 128 bufp = kmem_alloc(bufsize, KM_NOSLEEP); 129 if (bufp != NULL) 130 goto retry; 131 bufsize = LOG_MSGSIZE; 132 bufp = buf; 133 } 134 135 mp = log_makemsg(mid, sid, level, sl, LOG_KERN, bufp, 136 MIN(bufsize, msgp - bufp + 1), on_intr); 137 if (mp == NULL) { 138 if ((sl & (SL_CONSOLE | SL_LOGONLY)) == SL_CONSOLE && !on_intr) 139 console_printf("%s", body); 140 goto out; 141 } 142 143 if (sl & SL_USER) { 144 ssize_t resid; 145 sess_t *sessp; 146 147 mutex_enter(&pidlock); 148 sessp = curproc->p_sessp; 149 SESS_HOLD(sessp); 150 TTY_HOLD(sessp); 151 mutex_exit(&pidlock); 152 if (sessp->s_vp) 153 (void) vn_rdwr(UIO_WRITE, sessp->s_vp, 154 body, len, 0LL, UIO_SYSSPACE, 155 FAPPEND, (rlim64_t)LOG_HIWAT, kcred, &resid); 156 mutex_enter(&pidlock); 157 TTY_RELE(sessp); 158 SESS_RELE(sessp); 159 mutex_exit(&pidlock); 160 } 161 162 if (on_intr && !panicstr) { 163 (void) putq(log_intrq, mp); 164 softcall((void (*)(void *))log_flushq, log_intrq); 165 } else { 166 log_sendmsg(mp, zoneid); 167 } 168 out: 169 if (panicbuf_log + len < PANICBUFSIZE) { 170 uint32_t old, new; 171 do { 172 old = panicbuf_index; 173 new = old + len; 174 if (new >= PANICBUFSIZE) 175 new = panicbuf_log + len; 176 } while (cas32(&panicbuf_index, old, new) != old); 177 bcopy(body, &panicbuf[new - len], len); 178 } 179 if (bufp != buf) 180 kmem_free(bufp, bufsize); 181 } 182 183 void 184 vzprintf(zoneid_t zoneid, const char *fmt, va_list adx) 185 { 186 cprintf(fmt, adx, SL_CONSOLE | SL_NOTE, "", "", caller(), 0, 0, 0, 187 zoneid); 188 } 189 190 void 191 vprintf(const char *fmt, va_list adx) 192 { 193 vzprintf(GLOBAL_ZONEID, fmt, adx); 194 } 195 196 /*PRINTFLIKE1*/ 197 void 198 printf(const char *fmt, ...) 199 { 200 va_list adx; 201 202 va_start(adx, fmt); 203 cprintf(fmt, adx, SL_CONSOLE | SL_NOTE, "", "", caller(), 0, 0, 0, 204 GLOBAL_ZONEID); 205 va_end(adx); 206 } 207 208 /*PRINTFLIKE2*/ 209 void 210 zprintf(zoneid_t zoneid, const char *fmt, ...) 211 { 212 va_list adx; 213 214 va_start(adx, fmt); 215 cprintf(fmt, adx, SL_CONSOLE | SL_NOTE, "", "", caller(), 0, 0, 0, 216 zoneid); 217 va_end(adx); 218 } 219 220 void 221 vuprintf(const char *fmt, va_list adx) 222 { 223 cprintf(fmt, adx, SL_CONSOLE | SL_LOGONLY | SL_USER | SL_NOTE, 224 "", "", caller(), 0, 0, 0, GLOBAL_ZONEID); 225 } 226 227 /*PRINTFLIKE1*/ 228 void 229 uprintf(const char *fmt, ...) 230 { 231 va_list adx; 232 233 va_start(adx, fmt); 234 cprintf(fmt, adx, SL_CONSOLE | SL_LOGONLY | SL_USER | SL_NOTE, 235 "", "", caller(), 0, 0, 0, GLOBAL_ZONEID); 236 va_end(adx); 237 } 238 239 void 240 vzcmn_err(zoneid_t zoneid, int ce, const char *fmt, va_list adx) 241 { 242 if (ce == CE_PANIC) 243 vpanic(fmt, adx); 244 if ((uint_t)ce < CE_IGNORE) 245 cprintf(fmt, adx, ce_to_sl[ce] | SL_CONSOLE, 246 ce_prefix[ce], ce_suffix[ce], caller(), 0, 0, 0, 247 zoneid); 248 } 249 250 void 251 vcmn_err(int ce, const char *fmt, va_list adx) 252 { 253 vzcmn_err(GLOBAL_ZONEID, ce, fmt, adx); 254 } 255 256 /*PRINTFLIKE2*/ 257 void 258 cmn_err(int ce, const char *fmt, ...) 259 { 260 va_list adx; 261 262 va_start(adx, fmt); 263 if (ce == CE_PANIC) 264 vpanic(fmt, adx); 265 if ((uint_t)ce < CE_IGNORE) 266 cprintf(fmt, adx, ce_to_sl[ce] | SL_CONSOLE, 267 ce_prefix[ce], ce_suffix[ce], caller(), 0, 0, 0, 268 GLOBAL_ZONEID); 269 va_end(adx); 270 } 271 272 /*PRINTFLIKE3*/ 273 void 274 zcmn_err(zoneid_t zoneid, int ce, const char *fmt, ...) 275 { 276 va_list adx; 277 278 va_start(adx, fmt); 279 if (ce == CE_PANIC) 280 vpanic(fmt, adx); 281 if ((uint_t)ce < CE_IGNORE) 282 cprintf(fmt, adx, ce_to_sl[ce] | SL_CONSOLE, ce_prefix[ce], 283 ce_suffix[ce], caller(), 0, 0, 0, zoneid); 284 va_end(adx); 285 } 286 287 int 288 assfail(const char *a, const char *f, int l) 289 { 290 if (aask) { 291 printf("ASSERTION CAUGHT: %s, file: %s, line: %d", a, f, l); 292 debug_enter(NULL); 293 } 294 295 if (!aok && !panicstr) 296 panic("assertion failed: %s, file: %s, line: %d", a, f, l); 297 298 return (0); 299 } 300 301 int 302 strlog(short mid, short sid, char level, ushort_t sl, char *fmt, ...) 303 { 304 if (sl & log_global.lz_active) { 305 va_list adx; 306 va_start(adx, fmt); 307 cprintf(fmt, adx, sl, "", "", caller(), mid, sid, level, 308 GLOBAL_ZONEID); 309 va_end(adx); 310 } 311 return (1); 312 } 313 314 int 315 vstrlog(short mid, short sid, char level, ushort_t sl, char *fmt, va_list adx) 316 { 317 if (sl & log_global.lz_active) 318 cprintf(fmt, adx, sl, "", "", caller(), mid, sid, level, 319 GLOBAL_ZONEID); 320 return (1); 321 } 322