6659 nvlist_free(NULL) is a no-op

   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 (c) 2010, Oracle and/or its affiliates. All rights reserved.
  24  */
  25 
  26 /*
  27  * Panic software-diagnosis subsidiary
  28  *
  29  * We model a system panic as a defect diagnosis in FMA. When a system
  30  * panicks, savecore publishes events which we subscribe to here.
  31  *
  32  * Our driving events are all raised by savecore, run either from
  33  * startup of the dumpadm service or interactively at the command line.
  34  * The following describes the logic for the handling of these events.
  35  *
  36  * On reboot after panic we will run savecore as part of the dumpadm
  37  * service startup; we run savecore even if savecore is otherwise
  38  * disabled (ie dumpadm -n in effect) - we run savecore -c to check for
  39  * a valid dump and raise the initial event.
  40  *
  41  * If savecore (or savecore -c) observes a valid dump pending on the
  42  * device, it raises a "dump_pending_on_device" event provided this
  43  * was not an FMA-initiated panic (for those we will replay ereports
  44  * from the dump device as usual and make a diagnosis from those; we do
  45  * not need to open a case for the panic).  We subscribe to the
  46  * "dump_pending_on_device" event and use that to open a case;  we
  47  * open a case requesting the same case uuid as the panic dump image
  48  * has for the OS instance uuid - if that fails because of a duplicate
  49  * uuid then we have already opened a case for this panic so no need
  50  * to open another.
  51  *
  52  * Included in the "dump_pending_on_device" event is an indication of
  53  * whether or not dumpadm is enabled.  If not (dumpadm -n in effect)
  54  * then we do not expect any further events regarding this panic
  55  * until such time as the admin runs savecore manually (if ever).
  56  * So in this case we solve the case immediately after open.  If/when
  57  * subsequent events arrive when savecore is run manually, we will toss
  58  * them.
  59  *
  60  * If dumpadm is enabled then savecore, run from dumpadm service startup,
  61  * will attempt to process the dump - either to copy it off the dump
  62  * device (if saving compressed) or to uncompress it off the dump device.
  63  * If this succeeds savecore raises a "dump_available" event which
  64  * includes information on the directory it was saved in, the instance
  65  * number, image uuid, compressed form or not, and whether the dump
  66  * was complete (as per the dumphdr).  If the savecore fails for
  67  * some reason then it exits and raises a "savecore_failure" event.
  68  * These two events are raised even for FMA-initiated panics.
  69  *
  70  * We subscribe to both the "dump_available" and "savecore_failed" events,
  71  * and in the handling thereof we will close the case opened earlier (if
  72  * this is not an FMA-initiated panic).  On receipt of the initial
  73  * "dump_available" event we also arm a timer for +10 minutes if
  74  * dumpadm is enabled - if no "dump_available" or "savecore_failed" arrives
  75  * in that time we will solve the case on timeout.
  76  *
  77  * When the timer fires we check whether the initial event for each panic
  78  * case was received more than 30 minutes ago; if it was we solve the case
  79  * with what we have.  If we're still within the waiting period we rearm
  80  * for a further 10 minutes.  The timer is shared by all cases that we
  81  * create, which is why the fire interval is shorter than the maximum time
  82  * we are prepared to wait.
  83  */
  84 
  85 #include <strings.h>
  86 #include <sys/panic.h>
  87 #include <alloca.h>
  88 #include <zone.h>
  89 
  90 #include "../../common/sw.h"
  91 #include "panic.h"
  92 
  93 #define MAX_STRING_LEN 160
  94 
  95 static id_t myid;
  96 
  97 static id_t mytimerid;
  98 
  99 /*
 100  * Our serialization structure type.
 101  */
 102 #define SWDE_PANIC_CASEDATA_VERS        1
 103 
 104 typedef struct swde_panic_casedata {
 105         uint32_t scd_vers;              /* must be first member */
 106         uint64_t scd_receive_time;      /* when we first knew of this panic */
 107         size_t scd_nvlbufsz;            /* size of following buffer */
 108                                         /* packed attr nvlist follows */
 109 } swde_panic_casedata_t;
 110 
 111 static struct {
 112         fmd_stat_t swde_panic_diagnosed;
 113         fmd_stat_t swde_panic_badclass;
 114         fmd_stat_t swde_panic_noattr;
 115         fmd_stat_t swde_panic_unexpected_fm_panic;
 116         fmd_stat_t swde_panic_badattr;
 117         fmd_stat_t swde_panic_badfmri;
 118         fmd_stat_t swde_panic_noinstance;
 119         fmd_stat_t swde_panic_nouuid;
 120         fmd_stat_t swde_panic_dupuuid;
 121         fmd_stat_t swde_panic_nocase;
 122         fmd_stat_t swde_panic_notime;
 123         fmd_stat_t swde_panic_nopanicstr;
 124         fmd_stat_t swde_panic_nodumpdir;
 125         fmd_stat_t swde_panic_nostack;
 126         fmd_stat_t swde_panic_incomplete;
 127         fmd_stat_t swde_panic_failed;
 128         fmd_stat_t swde_panic_basecasedata;
 129         fmd_stat_t swde_panic_failsrlz;
 130 } swde_panic_stats = {
 131         { "swde_panic_diagnosed", FMD_TYPE_UINT64,
 132             "panic defects published" },
 133         { "swde_panic_badclass", FMD_TYPE_UINT64,
 134             "incorrect event class received" },
 135         { "swde_panic_noattr", FMD_TYPE_UINT64,
 136             "malformed event - missing attr nvlist" },
 137         { "swde_panic_unexpected_fm_panic", FMD_TYPE_UINT64,
 138             "dump available for an fm_panic()" },
 139         { "swde_panic_badattr", FMD_TYPE_UINT64,
 140             "malformed event - invalid attr list" },
 141         { "swde_panic_badfmri", FMD_TYPE_UINT64,
 142             "malformed event - fmri2str fails" },
 143         { "swde_panic_noinstance", FMD_TYPE_UINT64,
 144             "malformed event - no instance number" },
 145         { "swde_panic_nouuid", FMD_TYPE_UINT64,
 146             "malformed event - missing uuid" },
 147         { "swde_panic_dupuuid", FMD_TYPE_UINT64,
 148             "duplicate events received" },
 149         { "swde_panic_nocase", FMD_TYPE_UINT64,
 150             "case missing for uuid" },
 151         { "swde_panic_notime", FMD_TYPE_UINT64,
 152             "missing crash dump time" },
 153         { "swde_panic_nopanicstr", FMD_TYPE_UINT64,
 154             "missing panic string" },
 155         { "swde_panic_nodumpdir", FMD_TYPE_UINT64,
 156             "missing crashdump save directory" },
 157         { "swde_panic_nostack", FMD_TYPE_UINT64,
 158             "missing panic stack" },
 159         { "swde_panic_incomplete", FMD_TYPE_UINT64,
 160             "missing panic incomplete" },
 161         { "swde_panic_failed", FMD_TYPE_UINT64,
 162             "missing panic failed" },
 163         { "swde_panic_badcasedata", FMD_TYPE_UINT64,
 164             "bad case data during timeout" },
 165         { "swde_panic_failsrlz", FMD_TYPE_UINT64,
 166             "failures to serialize case data" },
 167 };
 168 
 169 #define BUMPSTAT(stat)          swde_panic_stats.stat.fmds_value.ui64++
 170 
 171 static nvlist_t *
 172 panic_sw_fmri(fmd_hdl_t *hdl, char *object)
 173 {
 174         nvlist_t *fmri;
 175         nvlist_t *sw_obj;
 176         int err = 0;
 177 
 178         fmri = fmd_nvl_alloc(hdl, FMD_SLEEP);
 179         err |= nvlist_add_uint8(fmri, FM_VERSION, FM_SW_SCHEME_VERSION);
 180         err |= nvlist_add_string(fmri, FM_FMRI_SCHEME, FM_FMRI_SCHEME_SW);
 181 
 182         sw_obj = fmd_nvl_alloc(hdl, FMD_SLEEP);
 183         err |= nvlist_add_string(sw_obj, FM_FMRI_SW_OBJ_PATH, object);
 184         err |= nvlist_add_nvlist(fmri, FM_FMRI_SW_OBJ, sw_obj);

 185         nvlist_free(sw_obj);
 186         if (!err)
 187                 return (fmri);
 188         else
 189                 return (0);
 190 }
 191 
 192 static const char *dumpfiles[2] = { "unix.%lld", "vmcore.%lld" };
 193 static const char *dumpfiles_comp[2] = { "vmdump.%lld", NULL};
 194 
 195 static void
 196 swde_panic_solve(fmd_hdl_t *hdl, fmd_case_t *cp,
 197     nvlist_t *attr, fmd_event_t *ep, boolean_t savecore_success)
 198 {
 199         char *dumpdir, *path, *uuid;
 200         nvlist_t *defect, *rsrc;
 201         nvpair_t *nvp;
 202         int i;
 203 
 204         /*
 205          * Attribute members to include in event-specific defect
 206          * payload.  Some attributes will not be present for some
 207          * cases - e.g., if we timed out and solved the case without
 208          * a "dump_available" report.
 209          */
 210         const char *toadd[] = {
 211                 "os-instance-uuid",     /* same as case uuid */
 212                 "panicstr",             /* for initial classification work */
 213                 "panicstack",           /* for initial classification work */
 214                 "crashtime",            /* in epoch time */
 215                 "panic-time",           /* Formatted crash time */
 216         };
 217 
 218         if (ep != NULL)
 219                 fmd_case_add_ereport(hdl, cp, ep);
 220         /*
 221          * As a temporary solution we create and fmri in the sw scheme
 222          * in panic_sw_fmri. This should become a generic fmri constructor
 223          *
 224          * We need to user a resource FMRI which will have a sufficiently
 225          * unique string representation such that fmd will not see
 226          * repeated panic diagnoses (all using the same defect class)
 227          * as duplicates and discard later cases.  We can't actually diagnose
 228          * the panic to anything specific (e.g., a path to a module and
 229          * function/line etc therein).  We could pick on a generic
 230          * representative such as /kernel/genunix but that could lead
 231          * to misunderstanding.  So we choose a path based on <dumpdir>
 232          * and the OS instance UUID - "<dumpdir>/.<os-instance-uuid>".
 233          * There's no file at that path (*) but no matter.  We can't use
 234          * <dumpdir>/vmdump.N or similar because if savecore is disabled
 235          * or failed we don't have any file or instance number.
 236          *
 237          * (*) Some day it would seem tidier to keep all files to do
 238          * with a single crash (unix/vmcore/vmdump, analysis output etc)
 239          * in a distinct directory, and <dumpdir>/.<uuid> seems like a good
 240          * choice.  For compatability we'd symlink into it.  So that is
 241          * another reason for this choice - some day it may exist!
 242          */
 243         (void) nvlist_lookup_string(attr, "dumpdir", &dumpdir);
 244         (void) nvlist_lookup_string(attr, "os-instance-uuid", &uuid);
 245         path = alloca(strlen(dumpdir) + 1 + 1 + 36 + 1);
 246         /* LINTED: E_SEC_SPRINTF_UNBOUNDED_COPY */
 247         (void) sprintf(path, "%s/.%s", dumpdir, uuid);
 248         rsrc = panic_sw_fmri(hdl, path);
 249 
 250         defect = fmd_nvl_create_defect(hdl, SW_SUNOS_PANIC_DEFECT,
 251             100, rsrc, NULL, rsrc);
 252         nvlist_free(rsrc);
 253 
 254         (void) nvlist_add_boolean_value(defect, "savecore-succcess",
 255             savecore_success);
 256 
 257         if (savecore_success) {
 258                 boolean_t compressed;
 259                 int64_t instance;
 260                 const char **pathfmts;
 261                 char buf[2][32];
 262                 int files = 0;
 263                 char *arr[2];
 264                 int i;
 265 
 266                 (void) nvlist_lookup_int64(attr, "instance", &instance);
 267                 (void) nvlist_lookup_boolean_value(attr, "compressed",
 268                     &compressed);
 269 
 270                 pathfmts = compressed ? &dumpfiles_comp[0] : &dumpfiles[0];
 271 
 272                 for (i = 0; i < 2; i++) {
 273                         if (pathfmts[i] == NULL) {
 274                                 arr[i] = NULL;
 275                                 continue;
 276                         }
 277 
 278                         (void) snprintf(buf[i], 32, pathfmts[i], instance);
 279                         arr[i] = buf[i];
 280                         files++;
 281                 }
 282 
 283                 (void) nvlist_add_string(defect, "dump-dir", dumpdir);
 284                 (void) nvlist_add_string_array(defect, "dump-files", arr,
 285                     files);
 286         } else {
 287                 char *rsn;
 288 
 289                 if (nvlist_lookup_string(attr, "failure-reason", &rsn) == 0)
 290                         (void) nvlist_add_string(defect, "failure-reason", rsn);
 291         }
 292 
 293         /*
 294          * Not all attributes will necessarily be available - eg if
 295          * dumpadm was not enabled there'll be no instance and dumpdir.
 296          */
 297         for (i = 0; i < sizeof (toadd) / sizeof (toadd[0]); i++) {
 298                 if (nvlist_lookup_nvpair(attr, toadd[i], &nvp) == 0)
 299                         (void) nvlist_add_nvpair(defect, nvp);
 300         }
 301 
 302         fmd_case_add_suspect(hdl, cp, defect);
 303         fmd_case_solve(hdl, cp);
 304 
 305         /*
 306          * Close the case.  Do no free casedata - framework does that for us
 307          * on closure callback.
 308          */
 309         fmd_case_close(hdl, cp);
 310         BUMPSTAT(swde_panic_diagnosed);
 311 }
 312 
 313 /*ARGSUSED*/
 314 static void
 315 swde_panic_timeout(fmd_hdl_t *hdl, id_t timerid, void *data)
 316 {
 317         fmd_case_t *cp = swde_case_first(hdl, myid);
 318         swde_panic_casedata_t *cdp;
 319         time_t now = time(NULL);
 320         nvlist_t *attr;
 321         int remain = 0;
 322         uint32_t vers;
 323 
 324         while (cp != NULL) {
 325                 cdp = swde_case_data(hdl, cp, &vers);
 326                 if (vers != SWDE_PANIC_CASEDATA_VERS)
 327                         fmd_hdl_abort(hdl, "case data version confused\n");
 328 
 329                 if (now > cdp->scd_receive_time + 30 * 60) {
 330                         if (nvlist_unpack((char *)cdp + sizeof (*cdp),
 331                             cdp->scd_nvlbufsz, &attr, 0) == 0) {
 332                                 swde_panic_solve(hdl, cp, attr, NULL, B_FALSE);
 333                                 nvlist_free(attr);
 334                         } else {
 335                                 BUMPSTAT(swde_panic_basecasedata);
 336                                 fmd_case_close(hdl, cp);
 337                         }
 338                 } else {
 339                         remain++;
 340                 }
 341 
 342 
 343                 cp = swde_case_next(hdl, cp);
 344         }
 345 
 346         if (remain) {
 347                 mytimerid = sw_timer_install(hdl, myid, NULL, NULL,
 348                     10ULL * NANOSEC * 60);
 349         }
 350 }
 351 
 352 /*
 353  * Our verify entry point is called for each of our open cases during
 354  * module load.  We must return 0 for the case to be closed by our caller,
 355  * or 1 to keep it (or if we have already closed it during this call).
 356  */
 357 static int
 358 swde_panic_vrfy(fmd_hdl_t *hdl, fmd_case_t *cp)
 359 {
 360         swde_panic_casedata_t *cdp;
 361         time_t now = time(NULL);
 362         nvlist_t *attr;
 363         uint32_t vers;
 364 
 365         cdp = swde_case_data(hdl, cp, &vers);
 366 
 367         if (vers != SWDE_PANIC_CASEDATA_VERS)
 368                 return (0);     /* case will be closed */
 369 
 370         if (now > cdp->scd_receive_time + 30 * 60) {
 371                 if (nvlist_unpack((char *)cdp + sizeof (*cdp),
 372                     cdp->scd_nvlbufsz, &attr, 0) == 0) {
 373                         swde_panic_solve(hdl, cp, attr, NULL, B_FALSE);
 374                         nvlist_free(attr);
 375                         return (1);     /* case already closed */
 376                 } else {
 377                         return (0);     /* close case */
 378                 }
 379         }
 380 
 381         if (mytimerid != 0)
 382                 mytimerid = sw_timer_install(hdl, myid,
 383                     NULL, NULL, 10ULL * NANOSEC * 60);
 384 
 385         return (1);     /* retain case */
 386 }
 387 
 388 /*
 389  * Handler for ireport.os.sunos.panic.dump_pending_on_device.
 390  *
 391  * A future RFE should try adding a means of avoiding diagnosing repeated
 392  * defects on panic loops, which would just add to the mayhem and potentially
 393  * log lots of calls through ASR.  Panics with similar enough panic
 394  * strings and/or stacks should not diagnose to new defects with some
 395  * period of time, for example.
 396  */
 397 
 398 /*ARGSUSED*/
 399 void
 400 swde_panic_detected(fmd_hdl_t *hdl, fmd_event_t *ep, nvlist_t *nvl,
 401     const char *class, void *arg)
 402 {
 403         boolean_t fm_panic, expect_savecore;
 404         swde_panic_casedata_t *cdp;
 405         nvlist_t *attr;
 406         fmd_case_t *cp;
 407         char *fmribuf;
 408         char *uuid;
 409         size_t sz;
 410 
 411         fmd_hdl_debug(hdl, "swde_panic_detected\n");
 412 
 413         if (nvlist_lookup_nvlist(nvl, FM_IREPORT_ATTRIBUTES, &attr) != 0) {
 414                 BUMPSTAT(swde_panic_noattr);
 415                 return;
 416         }
 417 
 418         if (nvlist_lookup_string(attr, "os-instance-uuid", &uuid) != 0) {
 419                 BUMPSTAT(swde_panic_nouuid);
 420                 return;
 421         }
 422 
 423         fmd_hdl_debug(hdl, "swde_panic_detected: OS instance %s\n", uuid);
 424 
 425         if (nvlist_lookup_boolean_value(attr, "fm-panic", &fm_panic) != 0 ||
 426             fm_panic == B_TRUE) {
 427                 BUMPSTAT(swde_panic_unexpected_fm_panic);
 428                 return;
 429         }
 430 
 431         /*
 432          * Prepare serialization data to be associated with a new
 433          * case.  Our serialization data consists of a swde_panic_casedata_t
 434          * structure followed by a packed nvlist of the attributes of
 435          * the initial event.
 436          */
 437         if (nvlist_size(attr, &sz, NV_ENCODE_NATIVE) != 0) {
 438                 BUMPSTAT(swde_panic_failsrlz);
 439                 return;
 440         }
 441 
 442         cdp = fmd_hdl_zalloc(hdl, sizeof (*cdp) + sz, FMD_SLEEP);
 443         fmribuf = (char *)cdp + sizeof (*cdp);
 444         cdp->scd_vers = SWDE_PANIC_CASEDATA_VERS;
 445         cdp->scd_receive_time = time(NULL);
 446         cdp->scd_nvlbufsz = sz;
 447 
 448         /*
 449          * Open a case with UUID matching the the panicking kernel, add this
 450          * event to the case.
 451          */
 452         if ((cp = swde_case_open(hdl, myid, uuid, SWDE_PANIC_CASEDATA_VERS,
 453             cdp, sizeof (*cdp) + sz)) == NULL) {
 454                 BUMPSTAT(swde_panic_dupuuid);
 455                 fmd_hdl_debug(hdl, "swde_case_open returned NULL - dup?\n");
 456                 fmd_hdl_free(hdl, cdp, sizeof (*cdp) + sz);
 457                 return;
 458         }
 459 
 460         fmd_case_setprincipal(hdl, cp, ep);
 461 
 462         if (nvlist_lookup_boolean_value(attr, "will-attempt-savecore",
 463             &expect_savecore) != 0 || expect_savecore == B_FALSE) {
 464                 fmd_hdl_debug(hdl, "savecore not being attempted - "
 465                     "solve now\n");
 466                 swde_panic_solve(hdl, cp, attr, ep, B_FALSE);
 467                 return;
 468         }
 469 
 470         /*
 471          * We expect to see either a "dump_available" or a "savecore_failed"
 472          * event before too long.  In case that never shows up, for whatever
 473          * reason, we want to be able to solve the case anyway.
 474          */
 475         fmd_case_add_ereport(hdl, cp, ep);
 476         (void) nvlist_pack(attr, &fmribuf, &sz, NV_ENCODE_NATIVE, 0);
 477         swde_case_data_write(hdl, cp);
 478 
 479         if (mytimerid == 0) {
 480                 mytimerid = sw_timer_install(hdl, myid, NULL, ep,
 481                     10ULL * NANOSEC * 60);
 482                 fmd_hdl_debug(hdl, "armed timer\n");
 483         } else {
 484                 fmd_hdl_debug(hdl, "timer already armed\n");
 485         }
 486 }
 487 
 488 /*
 489  * savecore has now run and saved a crash dump to the filesystem. It is
 490  * either a compressed dump (vmdump.n) or uncompressed {unix.n, vmcore.n}
 491  * Savecore has raised an ireport to say the dump is there.
 492  */
 493 
 494 /*ARGSUSED*/
 495 void
 496 swde_panic_savecore_done(fmd_hdl_t *hdl, fmd_event_t *ep, nvlist_t *nvl,
 497     const char *class, void *arg)
 498 {
 499         boolean_t savecore_success = (arg != NULL);
 500         boolean_t fm_panic;
 501         nvlist_t *attr;
 502         fmd_case_t *cp;
 503         char *uuid;
 504 
 505         fmd_hdl_debug(hdl, "savecore_done (%s)\n", savecore_success ?
 506             "success" : "fail");
 507 
 508         if (nvlist_lookup_nvlist(nvl, FM_IREPORT_ATTRIBUTES, &attr) != 0) {
 509                 BUMPSTAT(swde_panic_noattr);
 510                 return;
 511         }
 512 
 513         if (nvlist_lookup_boolean_value(attr, "fm-panic", &fm_panic) != 0 ||
 514             fm_panic == B_TRUE) {
 515                 return;         /* not expected, but just in case */
 516         }
 517 
 518         if (nvlist_lookup_string(attr, "os-instance-uuid", &uuid) != 0) {
 519                 BUMPSTAT(swde_panic_nouuid);
 520                 return;
 521         }
 522 
 523         /*
 524          * Find the case related to the panicking kernel; our cases have
 525          * the same uuid as the crashed OS image.
 526          */
 527         cp = fmd_case_uulookup(hdl, uuid);
 528         if (!cp) {
 529                 /* Unable to find the case. */
 530                 fmd_hdl_debug(hdl, "savecore_done: can't find case for "
 531                     "image %s\n", uuid);
 532                 BUMPSTAT(swde_panic_nocase);
 533                 return;
 534         }
 535 
 536         fmd_hdl_debug(hdl, "savecore_done: solving case %s\n", uuid);
 537         swde_panic_solve(hdl, cp, attr, ep, savecore_success);
 538 }
 539 
 540 const struct sw_disp swde_panic_disp[] = {
 541         { SW_SUNOS_PANIC_DETECTED, swde_panic_detected, NULL },
 542         { SW_SUNOS_PANIC_AVAIL, swde_panic_savecore_done, (void *)1 },
 543         { SW_SUNOS_PANIC_FAILURE, swde_panic_savecore_done, NULL },
 544         /*
 545          * Something has to subscribe to every fault
 546          * or defect diagnosed in fmd.  We do that here, but throw it away.
 547          */
 548         { SW_SUNOS_PANIC_DEFECT, NULL, NULL },
 549         { NULL, NULL, NULL }
 550 };
 551 
 552 /*ARGSUSED*/
 553 int
 554 swde_panic_init(fmd_hdl_t *hdl, id_t id, const struct sw_disp **dpp,
 555     int *nelemp)
 556 {
 557         myid = id;
 558 
 559         if (getzoneid() != GLOBAL_ZONEID)
 560                 return (SW_SUB_INIT_FAIL_VOLUNTARY);
 561 
 562         (void) fmd_stat_create(hdl, FMD_STAT_NOALLOC,
 563             sizeof (swde_panic_stats) / sizeof (fmd_stat_t),
 564             (fmd_stat_t *)&swde_panic_stats);
 565 
 566         fmd_hdl_subscribe(hdl, SW_SUNOS_PANIC_DETECTED);
 567         fmd_hdl_subscribe(hdl, SW_SUNOS_PANIC_FAILURE);
 568         fmd_hdl_subscribe(hdl, SW_SUNOS_PANIC_AVAIL);
 569 
 570         *dpp = &swde_panic_disp[0];
 571         *nelemp = sizeof (swde_panic_disp) / sizeof (swde_panic_disp[0]);
 572         return (SW_SUB_INIT_SUCCESS);
 573 }
 574 
 575 void
 576 swde_panic_fini(fmd_hdl_t *hdl)
 577 {
 578         if (mytimerid)
 579                 sw_timer_remove(hdl, myid, mytimerid);
 580 }
 581 
 582 const struct sw_subinfo panic_diag_info = {
 583         "panic diagnosis",              /* swsub_name */
 584         SW_CASE_PANIC,                  /* swsub_casetype */
 585         swde_panic_init,                /* swsub_init */
 586         swde_panic_fini,                /* swsub_fini */
 587         swde_panic_timeout,             /* swsub_timeout */
 588         NULL,                           /* swsub_case_close */
 589         swde_panic_vrfy,                /* swsub_case_vrfy */
 590 };
--- EOF ---