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.
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.
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]
22 * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
26 * Fault Management Architecture (FMA) Resource and Protocol Support
28 * The routines contained herein provide services to support kernel subsystems
29 * in publishing fault management telemetry (see PSARC 2002/412 and 2003/089).
31 * Name-Value Pair Lists
33 * The embodiment of an FMA protocol element (event, fmri or authority) is a
34 * name-value pair list (nvlist_t). FMA-specific nvlist construtor and
35 * destructor functions, fm_nvlist_create() and fm_nvlist_destroy(), are used
36 * to create an nvpair list using custom allocators. Callers may choose to
37 * allocate either from the kernel memory allocator, or from a preallocated
38 * buffer, useful in constrained contexts like high-level interrupt routines.
40 * Protocol Event and FMRI Construction
42 * Convenience routines are provided to construct nvlist events according to
43 * the FMA Event Protocol and Naming Schema specification for ereports and
44 * FMRIs for the dev, cpu, hc, mem, legacy hc and de schemes.
48 * Routines to generate ENA formats 0, 1 and 2 are available as well as
49 * routines to increment formats 1 and 2. Individual fields within the
50 * ENA are extractable via fm_ena_time_get(), fm_ena_id_get(),
51 * fm_ena_format_get() and fm_ena_gen_get().
54 #include <sys/types.h>
57 #include <sys/nvpair.h>
58 #include <sys/cmn_err.h>
59 #include <sys/sysmacros.h>
60 #include <sys/sunddi.h>
61 #include <sys/systeminfo.h>
62 #include <sys/fm/util.h>
63 #include <sys/fm/protocol.h>
64 #include <sys/kstat.h>
65 #include <sys/zfs_context.h>
67 #include <sys/atomic.h>
68 #include <sys/condvar.h>
69 #include <sys/console.h>
72 #include <sys/zfs_ioctl.h>
74 int zfs_zevent_len_max
= 0;
75 int zfs_zevent_cols
= 80;
76 int zfs_zevent_console
= 0;
78 static int zevent_len_cur
= 0;
79 static int zevent_waiters
= 0;
80 static int zevent_flags
= 0;
82 /* Num events rate limited since the last time zfs_zevent_next() was called */
83 static uint64_t ratelimit_dropped
= 0;
86 * The EID (Event IDentifier) is used to uniquely tag a zevent when it is
87 * posted. The posted EIDs are monotonically increasing but not persistent.
88 * They will be reset to the initial value (1) each time the kernel module is
91 static uint64_t zevent_eid
= 0;
93 static kmutex_t zevent_lock
;
94 static list_t zevent_list
;
95 static kcondvar_t zevent_cv
;
100 * Common fault management kstats to record event generation failures
104 kstat_named_t erpt_dropped
; /* num erpts dropped on post */
105 kstat_named_t erpt_set_failed
; /* num erpt set failures */
106 kstat_named_t fmri_set_failed
; /* num fmri set failures */
107 kstat_named_t payload_set_failed
; /* num payload set failures */
110 static struct erpt_kstat erpt_kstat_data
= {
111 { "erpt-dropped", KSTAT_DATA_UINT64
},
112 { "erpt-set-failed", KSTAT_DATA_UINT64
},
113 { "fmri-set-failed", KSTAT_DATA_UINT64
},
114 { "payload-set-failed", KSTAT_DATA_UINT64
}
122 * Formatting utility function for fm_nvprintr. We attempt to wrap chunks of
123 * output so they aren't split across console lines, and return the end column.
127 fm_printf(int depth
, int c
, int cols
, const char *format
, ...)
133 va_start(ap
, format
);
134 width
= vsnprintf(&c1
, sizeof (c1
), format
, ap
);
137 if (c
+ width
>= cols
) {
138 console_printf("\n");
140 if (format
[0] != ' ' && depth
> 0) {
146 va_start(ap
, format
);
147 console_vprintf(format
, ap
);
150 return ((c
+ width
) % cols
);
154 * Recursively print an nvlist in the specified column width and return the
155 * column we end up in. This function is called recursively by fm_nvprint(),
156 * below. We generically format the entire nvpair using hexadecimal
157 * integers and strings, and elide any integer arrays. Arrays are basically
158 * used for cache dumps right now, so we suppress them so as not to overwhelm
159 * the amount of console output we produce at panic time. This can be further
160 * enhanced as FMA technology grows based upon the needs of consumers. All
161 * FMA telemetry is logged using the dump device transport, so the console
162 * output serves only as a fallback in case this procedure is unsuccessful.
165 fm_nvprintr(nvlist_t
*nvl
, int d
, int c
, int cols
)
169 for (nvp
= nvlist_next_nvpair(nvl
, NULL
);
170 nvp
!= NULL
; nvp
= nvlist_next_nvpair(nvl
, nvp
)) {
172 data_type_t type
= nvpair_type(nvp
);
173 const char *name
= nvpair_name(nvp
);
183 if (strcmp(name
, FM_CLASS
) == 0)
184 continue; /* already printed by caller */
186 c
= fm_printf(d
, c
, cols
, " %s=", name
);
189 case DATA_TYPE_BOOLEAN
:
190 c
= fm_printf(d
+ 1, c
, cols
, " 1");
193 case DATA_TYPE_BOOLEAN_VALUE
:
194 (void) nvpair_value_boolean_value(nvp
, &b
);
195 c
= fm_printf(d
+ 1, c
, cols
, b
? "1" : "0");
199 (void) nvpair_value_byte(nvp
, &i8
);
200 c
= fm_printf(d
+ 1, c
, cols
, "0x%x", i8
);
204 (void) nvpair_value_int8(nvp
, (void *)&i8
);
205 c
= fm_printf(d
+ 1, c
, cols
, "0x%x", i8
);
208 case DATA_TYPE_UINT8
:
209 (void) nvpair_value_uint8(nvp
, &i8
);
210 c
= fm_printf(d
+ 1, c
, cols
, "0x%x", i8
);
213 case DATA_TYPE_INT16
:
214 (void) nvpair_value_int16(nvp
, (void *)&i16
);
215 c
= fm_printf(d
+ 1, c
, cols
, "0x%x", i16
);
218 case DATA_TYPE_UINT16
:
219 (void) nvpair_value_uint16(nvp
, &i16
);
220 c
= fm_printf(d
+ 1, c
, cols
, "0x%x", i16
);
223 case DATA_TYPE_INT32
:
224 (void) nvpair_value_int32(nvp
, (void *)&i32
);
225 c
= fm_printf(d
+ 1, c
, cols
, "0x%x", i32
);
228 case DATA_TYPE_UINT32
:
229 (void) nvpair_value_uint32(nvp
, &i32
);
230 c
= fm_printf(d
+ 1, c
, cols
, "0x%x", i32
);
233 case DATA_TYPE_INT64
:
234 (void) nvpair_value_int64(nvp
, (void *)&i64
);
235 c
= fm_printf(d
+ 1, c
, cols
, "0x%llx",
239 case DATA_TYPE_UINT64
:
240 (void) nvpair_value_uint64(nvp
, &i64
);
241 c
= fm_printf(d
+ 1, c
, cols
, "0x%llx",
245 case DATA_TYPE_HRTIME
:
246 (void) nvpair_value_hrtime(nvp
, (void *)&i64
);
247 c
= fm_printf(d
+ 1, c
, cols
, "0x%llx",
251 case DATA_TYPE_STRING
:
252 (void) nvpair_value_string(nvp
, &str
);
253 c
= fm_printf(d
+ 1, c
, cols
, "\"%s\"",
254 str
? str
: "<NULL>");
257 case DATA_TYPE_NVLIST
:
258 c
= fm_printf(d
+ 1, c
, cols
, "[");
259 (void) nvpair_value_nvlist(nvp
, &cnv
);
260 c
= fm_nvprintr(cnv
, d
+ 1, c
, cols
);
261 c
= fm_printf(d
+ 1, c
, cols
, " ]");
264 case DATA_TYPE_NVLIST_ARRAY
: {
268 c
= fm_printf(d
+ 1, c
, cols
, "[");
269 (void) nvpair_value_nvlist_array(nvp
, &val
, &nelem
);
270 for (i
= 0; i
< nelem
; i
++) {
271 c
= fm_nvprintr(val
[i
], d
+ 1, c
, cols
);
273 c
= fm_printf(d
+ 1, c
, cols
, " ]");
277 case DATA_TYPE_INT8_ARRAY
: {
281 c
= fm_printf(d
+ 1, c
, cols
, "[ ");
282 (void) nvpair_value_int8_array(nvp
, &val
, &nelem
);
283 for (i
= 0; i
< nelem
; i
++)
284 c
= fm_printf(d
+ 1, c
, cols
, "0x%llx ",
285 (u_longlong_t
)val
[i
]);
287 c
= fm_printf(d
+ 1, c
, cols
, "]");
291 case DATA_TYPE_UINT8_ARRAY
: {
295 c
= fm_printf(d
+ 1, c
, cols
, "[ ");
296 (void) nvpair_value_uint8_array(nvp
, &val
, &nelem
);
297 for (i
= 0; i
< nelem
; i
++)
298 c
= fm_printf(d
+ 1, c
, cols
, "0x%llx ",
299 (u_longlong_t
)val
[i
]);
301 c
= fm_printf(d
+ 1, c
, cols
, "]");
305 case DATA_TYPE_INT16_ARRAY
: {
309 c
= fm_printf(d
+ 1, c
, cols
, "[ ");
310 (void) nvpair_value_int16_array(nvp
, &val
, &nelem
);
311 for (i
= 0; i
< nelem
; i
++)
312 c
= fm_printf(d
+ 1, c
, cols
, "0x%llx ",
313 (u_longlong_t
)val
[i
]);
315 c
= fm_printf(d
+ 1, c
, cols
, "]");
319 case DATA_TYPE_UINT16_ARRAY
: {
323 c
= fm_printf(d
+ 1, c
, cols
, "[ ");
324 (void) nvpair_value_uint16_array(nvp
, &val
, &nelem
);
325 for (i
= 0; i
< nelem
; i
++)
326 c
= fm_printf(d
+ 1, c
, cols
, "0x%llx ",
327 (u_longlong_t
)val
[i
]);
329 c
= fm_printf(d
+ 1, c
, cols
, "]");
333 case DATA_TYPE_INT32_ARRAY
: {
337 c
= fm_printf(d
+ 1, c
, cols
, "[ ");
338 (void) nvpair_value_int32_array(nvp
, &val
, &nelem
);
339 for (i
= 0; i
< nelem
; i
++)
340 c
= fm_printf(d
+ 1, c
, cols
, "0x%llx ",
341 (u_longlong_t
)val
[i
]);
343 c
= fm_printf(d
+ 1, c
, cols
, "]");
347 case DATA_TYPE_UINT32_ARRAY
: {
351 c
= fm_printf(d
+ 1, c
, cols
, "[ ");
352 (void) nvpair_value_uint32_array(nvp
, &val
, &nelem
);
353 for (i
= 0; i
< nelem
; i
++)
354 c
= fm_printf(d
+ 1, c
, cols
, "0x%llx ",
355 (u_longlong_t
)val
[i
]);
357 c
= fm_printf(d
+ 1, c
, cols
, "]");
361 case DATA_TYPE_INT64_ARRAY
: {
365 c
= fm_printf(d
+ 1, c
, cols
, "[ ");
366 (void) nvpair_value_int64_array(nvp
, &val
, &nelem
);
367 for (i
= 0; i
< nelem
; i
++)
368 c
= fm_printf(d
+ 1, c
, cols
, "0x%llx ",
369 (u_longlong_t
)val
[i
]);
371 c
= fm_printf(d
+ 1, c
, cols
, "]");
375 case DATA_TYPE_UINT64_ARRAY
: {
379 c
= fm_printf(d
+ 1, c
, cols
, "[ ");
380 (void) nvpair_value_uint64_array(nvp
, &val
, &nelem
);
381 for (i
= 0; i
< nelem
; i
++)
382 c
= fm_printf(d
+ 1, c
, cols
, "0x%llx ",
383 (u_longlong_t
)val
[i
]);
385 c
= fm_printf(d
+ 1, c
, cols
, "]");
389 case DATA_TYPE_STRING_ARRAY
:
390 case DATA_TYPE_BOOLEAN_ARRAY
:
391 case DATA_TYPE_BYTE_ARRAY
:
392 c
= fm_printf(d
+ 1, c
, cols
, "[...]");
395 case DATA_TYPE_UNKNOWN
:
396 case DATA_TYPE_DONTCARE
:
397 c
= fm_printf(d
+ 1, c
, cols
, "<unknown>");
406 fm_nvprint(nvlist_t
*nvl
)
411 console_printf("\n");
413 if (nvlist_lookup_string(nvl
, FM_CLASS
, &class) == 0)
414 c
= fm_printf(0, c
, zfs_zevent_cols
, "%s", class);
416 if (fm_nvprintr(nvl
, 0, c
, zfs_zevent_cols
) != 0)
417 console_printf("\n");
419 console_printf("\n");
423 zfs_zevent_alloc(void)
427 ev
= kmem_zalloc(sizeof (zevent_t
), KM_SLEEP
);
429 list_create(&ev
->ev_ze_list
, sizeof (zfs_zevent_t
),
430 offsetof(zfs_zevent_t
, ze_node
));
431 list_link_init(&ev
->ev_node
);
437 zfs_zevent_free(zevent_t
*ev
)
439 /* Run provided cleanup callback */
440 ev
->ev_cb(ev
->ev_nvl
, ev
->ev_detector
);
442 list_destroy(&ev
->ev_ze_list
);
443 kmem_free(ev
, sizeof (zevent_t
));
447 zfs_zevent_drain(zevent_t
*ev
)
451 ASSERT(MUTEX_HELD(&zevent_lock
));
452 list_remove(&zevent_list
, ev
);
454 /* Remove references to this event in all private file data */
455 while ((ze
= list_head(&ev
->ev_ze_list
)) != NULL
) {
456 list_remove(&ev
->ev_ze_list
, ze
);
457 ze
->ze_zevent
= NULL
;
465 zfs_zevent_drain_all(int *count
)
469 mutex_enter(&zevent_lock
);
470 while ((ev
= list_head(&zevent_list
)) != NULL
)
471 zfs_zevent_drain(ev
);
473 *count
= zevent_len_cur
;
475 mutex_exit(&zevent_lock
);
479 * New zevents are inserted at the head. If the maximum queue
480 * length is exceeded a zevent will be drained from the tail.
481 * As part of this any user space processes which currently have
482 * a reference to this zevent_t in their private data will have
483 * this reference set to NULL.
486 zfs_zevent_insert(zevent_t
*ev
)
488 ASSERT(MUTEX_HELD(&zevent_lock
));
489 list_insert_head(&zevent_list
, ev
);
491 if (zevent_len_cur
>= zfs_zevent_len_max
)
492 zfs_zevent_drain(list_tail(&zevent_list
));
498 * Post a zevent. The cb will be called when nvl and detector are no longer
500 * - An error happened and a zevent can't be posted. In this case, cb is called
501 * before zfs_zevent_post() returns.
502 * - The event is being drained and freed.
505 zfs_zevent_post(nvlist_t
*nvl
, nvlist_t
*detector
, zevent_cb_t
*cb
)
517 tv_array
[0] = tv
.tv_sec
;
518 tv_array
[1] = tv
.tv_nsec
;
520 error
= nvlist_add_int64_array(nvl
, FM_EREPORT_TIME
, tv_array
, 2);
522 atomic_inc_64(&erpt_kstat_data
.erpt_set_failed
.value
.ui64
);
526 eid
= atomic_inc_64_nv(&zevent_eid
);
527 error
= nvlist_add_uint64(nvl
, FM_EREPORT_EID
, eid
);
529 atomic_inc_64(&erpt_kstat_data
.erpt_set_failed
.value
.ui64
);
533 error
= nvlist_size(nvl
, &nvl_size
, NV_ENCODE_NATIVE
);
535 atomic_inc_64(&erpt_kstat_data
.erpt_dropped
.value
.ui64
);
539 if (nvl_size
> ERPT_DATA_SZ
|| nvl_size
== 0) {
540 atomic_inc_64(&erpt_kstat_data
.erpt_dropped
.value
.ui64
);
545 if (zfs_zevent_console
)
548 ev
= zfs_zevent_alloc();
550 atomic_inc_64(&erpt_kstat_data
.erpt_dropped
.value
.ui64
);
556 ev
->ev_detector
= detector
;
560 mutex_enter(&zevent_lock
);
561 zfs_zevent_insert(ev
);
562 cv_broadcast(&zevent_cv
);
563 mutex_exit(&zevent_lock
);
573 zfs_zevent_minor_to_state(minor_t minor
, zfs_zevent_t
**ze
)
575 *ze
= zfsdev_get_state(minor
, ZST_ZEVENT
);
577 return (SET_ERROR(EBADF
));
583 zfs_zevent_fd_hold(int fd
, minor_t
*minorp
, zfs_zevent_t
**ze
)
590 return (SET_ERROR(EBADF
));
592 error
= zfsdev_getminor(fp
->f_file
, minorp
);
594 error
= zfs_zevent_minor_to_state(*minorp
, ze
);
597 zfs_zevent_fd_rele(fd
);
603 zfs_zevent_fd_rele(int fd
)
609 * Get the next zevent in the stream and place a copy in 'event'. This
610 * may fail with ENOMEM if the encoded nvlist size exceeds the passed
611 * 'event_size'. In this case the stream pointer is not advanced and
612 * and 'event_size' is set to the minimum required buffer size.
615 zfs_zevent_next(zfs_zevent_t
*ze
, nvlist_t
**event
, uint64_t *event_size
,
622 mutex_enter(&zevent_lock
);
623 if (ze
->ze_zevent
== NULL
) {
624 /* New stream start at the beginning/tail */
625 ev
= list_tail(&zevent_list
);
632 * Existing stream continue with the next element and remove
633 * ourselves from the wait queue for the previous element
635 ev
= list_prev(&zevent_list
, ze
->ze_zevent
);
642 VERIFY(nvlist_size(ev
->ev_nvl
, &size
, NV_ENCODE_NATIVE
) == 0);
643 if (size
> *event_size
) {
650 list_remove(&ze
->ze_zevent
->ev_ze_list
, ze
);
653 list_insert_head(&ev
->ev_ze_list
, ze
);
654 (void) nvlist_dup(ev
->ev_nvl
, event
, KM_SLEEP
);
655 *dropped
= ze
->ze_dropped
;
658 /* Include events dropped due to rate limiting */
659 *dropped
+= ratelimit_dropped
;
660 ratelimit_dropped
= 0;
664 mutex_exit(&zevent_lock
);
670 * Wait in an interruptible state for any new events.
673 zfs_zevent_wait(zfs_zevent_t
*ze
)
677 mutex_enter(&zevent_lock
);
680 while (error
== EAGAIN
) {
681 if (zevent_flags
& ZEVENT_SHUTDOWN
) {
682 error
= SET_ERROR(ESHUTDOWN
);
686 error
= cv_timedwait_sig(&zevent_cv
, &zevent_lock
,
687 ddi_get_lbolt() + MSEC_TO_TICK(10));
688 if (signal_pending(current
)) {
689 error
= SET_ERROR(EINTR
);
691 } else if (!list_is_empty(&zevent_list
)) {
700 mutex_exit(&zevent_lock
);
706 * The caller may seek to a specific EID by passing that EID. If the EID
707 * is still available in the posted list of events the cursor is positioned
708 * there. Otherwise ENOENT is returned and the cursor is not moved.
710 * There are two reserved EIDs which may be passed and will never fail.
711 * ZEVENT_SEEK_START positions the cursor at the start of the list, and
712 * ZEVENT_SEEK_END positions the cursor at the end of the list.
715 zfs_zevent_seek(zfs_zevent_t
*ze
, uint64_t eid
)
720 mutex_enter(&zevent_lock
);
722 if (eid
== ZEVENT_SEEK_START
) {
724 list_remove(&ze
->ze_zevent
->ev_ze_list
, ze
);
726 ze
->ze_zevent
= NULL
;
730 if (eid
== ZEVENT_SEEK_END
) {
732 list_remove(&ze
->ze_zevent
->ev_ze_list
, ze
);
734 ev
= list_head(&zevent_list
);
737 list_insert_head(&ev
->ev_ze_list
, ze
);
739 ze
->ze_zevent
= NULL
;
745 for (ev
= list_tail(&zevent_list
); ev
!= NULL
;
746 ev
= list_prev(&zevent_list
, ev
)) {
747 if (ev
->ev_eid
== eid
) {
749 list_remove(&ze
->ze_zevent
->ev_ze_list
, ze
);
752 list_insert_head(&ev
->ev_ze_list
, ze
);
761 mutex_exit(&zevent_lock
);
767 zfs_zevent_init(zfs_zevent_t
**zep
)
771 ze
= *zep
= kmem_zalloc(sizeof (zfs_zevent_t
), KM_SLEEP
);
772 list_link_init(&ze
->ze_node
);
776 zfs_zevent_destroy(zfs_zevent_t
*ze
)
778 mutex_enter(&zevent_lock
);
780 list_remove(&ze
->ze_zevent
->ev_ze_list
, ze
);
781 mutex_exit(&zevent_lock
);
783 kmem_free(ze
, sizeof (zfs_zevent_t
));
788 * Wrapppers for FM nvlist allocators
792 i_fm_alloc(nv_alloc_t
*nva
, size_t size
)
794 return (kmem_zalloc(size
, KM_SLEEP
));
799 i_fm_free(nv_alloc_t
*nva
, void *buf
, size_t size
)
801 kmem_free(buf
, size
);
804 const nv_alloc_ops_t fm_mem_alloc_ops
= {
807 .nv_ao_alloc
= i_fm_alloc
,
808 .nv_ao_free
= i_fm_free
,
813 * Create and initialize a new nv_alloc_t for a fixed buffer, buf. A pointer
814 * to the newly allocated nv_alloc_t structure is returned upon success or NULL
815 * is returned to indicate that the nv_alloc structure could not be created.
818 fm_nva_xcreate(char *buf
, size_t bufsz
)
820 nv_alloc_t
*nvhdl
= kmem_zalloc(sizeof (nv_alloc_t
), KM_SLEEP
);
822 if (bufsz
== 0 || nv_alloc_init(nvhdl
, nv_fixed_ops
, buf
, bufsz
) != 0) {
823 kmem_free(nvhdl
, sizeof (nv_alloc_t
));
831 * Destroy a previously allocated nv_alloc structure. The fixed buffer
832 * associated with nva must be freed by the caller.
835 fm_nva_xdestroy(nv_alloc_t
*nva
)
838 kmem_free(nva
, sizeof (nv_alloc_t
));
842 * Create a new nv list. A pointer to a new nv list structure is returned
843 * upon success or NULL is returned to indicate that the structure could
844 * not be created. The newly created nv list is created and managed by the
845 * operations installed in nva. If nva is NULL, the default FMA nva
846 * operations are installed and used.
848 * When called from the kernel and nva == NULL, this function must be called
849 * from passive kernel context with no locks held that can prevent a
850 * sleeping memory allocation from occurring. Otherwise, this function may
851 * be called from other kernel contexts as long a valid nva created via
852 * fm_nva_create() is supplied.
855 fm_nvlist_create(nv_alloc_t
*nva
)
862 nvhdl
= kmem_zalloc(sizeof (nv_alloc_t
), KM_SLEEP
);
864 if (nv_alloc_init(nvhdl
, &fm_mem_alloc_ops
, NULL
, 0) != 0) {
865 kmem_free(nvhdl
, sizeof (nv_alloc_t
));
873 if (nvlist_xalloc(&nvl
, NV_UNIQUE_NAME
, nvhdl
) != 0) {
875 nv_alloc_fini(nvhdl
);
876 kmem_free(nvhdl
, sizeof (nv_alloc_t
));
885 * Destroy a previously allocated nvlist structure. flag indicates whether
886 * or not the associated nva structure should be freed (FM_NVA_FREE) or
887 * retained (FM_NVA_RETAIN). Retaining the nv alloc structure allows
888 * it to be re-used for future nvlist creation operations.
891 fm_nvlist_destroy(nvlist_t
*nvl
, int flag
)
893 nv_alloc_t
*nva
= nvlist_lookup_nv_alloc(nvl
);
898 if (flag
== FM_NVA_FREE
)
899 fm_nva_xdestroy(nva
);
904 i_fm_payload_set(nvlist_t
*payload
, const char *name
, va_list ap
)
909 while (ret
== 0 && name
!= NULL
) {
910 type
= va_arg(ap
, data_type_t
);
913 ret
= nvlist_add_byte(payload
, name
,
916 case DATA_TYPE_BYTE_ARRAY
:
917 nelem
= va_arg(ap
, int);
918 ret
= nvlist_add_byte_array(payload
, name
,
919 va_arg(ap
, uchar_t
*), nelem
);
921 case DATA_TYPE_BOOLEAN_VALUE
:
922 ret
= nvlist_add_boolean_value(payload
, name
,
923 va_arg(ap
, boolean_t
));
925 case DATA_TYPE_BOOLEAN_ARRAY
:
926 nelem
= va_arg(ap
, int);
927 ret
= nvlist_add_boolean_array(payload
, name
,
928 va_arg(ap
, boolean_t
*), nelem
);
931 ret
= nvlist_add_int8(payload
, name
,
934 case DATA_TYPE_INT8_ARRAY
:
935 nelem
= va_arg(ap
, int);
936 ret
= nvlist_add_int8_array(payload
, name
,
937 va_arg(ap
, int8_t *), nelem
);
939 case DATA_TYPE_UINT8
:
940 ret
= nvlist_add_uint8(payload
, name
,
943 case DATA_TYPE_UINT8_ARRAY
:
944 nelem
= va_arg(ap
, int);
945 ret
= nvlist_add_uint8_array(payload
, name
,
946 va_arg(ap
, uint8_t *), nelem
);
948 case DATA_TYPE_INT16
:
949 ret
= nvlist_add_int16(payload
, name
,
952 case DATA_TYPE_INT16_ARRAY
:
953 nelem
= va_arg(ap
, int);
954 ret
= nvlist_add_int16_array(payload
, name
,
955 va_arg(ap
, int16_t *), nelem
);
957 case DATA_TYPE_UINT16
:
958 ret
= nvlist_add_uint16(payload
, name
,
961 case DATA_TYPE_UINT16_ARRAY
:
962 nelem
= va_arg(ap
, int);
963 ret
= nvlist_add_uint16_array(payload
, name
,
964 va_arg(ap
, uint16_t *), nelem
);
966 case DATA_TYPE_INT32
:
967 ret
= nvlist_add_int32(payload
, name
,
968 va_arg(ap
, int32_t));
970 case DATA_TYPE_INT32_ARRAY
:
971 nelem
= va_arg(ap
, int);
972 ret
= nvlist_add_int32_array(payload
, name
,
973 va_arg(ap
, int32_t *), nelem
);
975 case DATA_TYPE_UINT32
:
976 ret
= nvlist_add_uint32(payload
, name
,
977 va_arg(ap
, uint32_t));
979 case DATA_TYPE_UINT32_ARRAY
:
980 nelem
= va_arg(ap
, int);
981 ret
= nvlist_add_uint32_array(payload
, name
,
982 va_arg(ap
, uint32_t *), nelem
);
984 case DATA_TYPE_INT64
:
985 ret
= nvlist_add_int64(payload
, name
,
986 va_arg(ap
, int64_t));
988 case DATA_TYPE_INT64_ARRAY
:
989 nelem
= va_arg(ap
, int);
990 ret
= nvlist_add_int64_array(payload
, name
,
991 va_arg(ap
, int64_t *), nelem
);
993 case DATA_TYPE_UINT64
:
994 ret
= nvlist_add_uint64(payload
, name
,
995 va_arg(ap
, uint64_t));
997 case DATA_TYPE_UINT64_ARRAY
:
998 nelem
= va_arg(ap
, int);
999 ret
= nvlist_add_uint64_array(payload
, name
,
1000 va_arg(ap
, uint64_t *), nelem
);
1002 case DATA_TYPE_STRING
:
1003 ret
= nvlist_add_string(payload
, name
,
1004 va_arg(ap
, char *));
1006 case DATA_TYPE_STRING_ARRAY
:
1007 nelem
= va_arg(ap
, int);
1008 ret
= nvlist_add_string_array(payload
, name
,
1009 va_arg(ap
, char **), nelem
);
1011 case DATA_TYPE_NVLIST
:
1012 ret
= nvlist_add_nvlist(payload
, name
,
1013 va_arg(ap
, nvlist_t
*));
1015 case DATA_TYPE_NVLIST_ARRAY
:
1016 nelem
= va_arg(ap
, int);
1017 ret
= nvlist_add_nvlist_array(payload
, name
,
1018 va_arg(ap
, nvlist_t
**), nelem
);
1024 name
= va_arg(ap
, char *);
1030 fm_payload_set(nvlist_t
*payload
, ...)
1036 va_start(ap
, payload
);
1037 name
= va_arg(ap
, char *);
1038 ret
= i_fm_payload_set(payload
, name
, ap
);
1042 atomic_inc_64(&erpt_kstat_data
.payload_set_failed
.value
.ui64
);
1046 * Set-up and validate the members of an ereport event according to:
1048 * Member name Type Value
1049 * ====================================================
1050 * class string ereport
1052 * ena uint64_t <ena>
1053 * detector nvlist_t <detector>
1054 * ereport-payload nvlist_t <var args>
1056 * We don't actually add a 'version' member to the payload. Really,
1057 * the version quoted to us by our caller is that of the category 1
1058 * "ereport" event class (and we require FM_EREPORT_VERS0) but
1059 * the payload version of the actual leaf class event under construction
1060 * may be something else. Callers should supply a version in the varargs,
1061 * or (better) we could take two version arguments - one for the
1062 * ereport category 1 classification (expect FM_EREPORT_VERS0) and one
1063 * for the leaf class.
1066 fm_ereport_set(nvlist_t
*ereport
, int version
, const char *erpt_class
,
1067 uint64_t ena
, const nvlist_t
*detector
, ...)
1069 char ereport_class
[FM_MAX_CLASS
];
1074 if (version
!= FM_EREPORT_VERS0
) {
1075 atomic_inc_64(&erpt_kstat_data
.erpt_set_failed
.value
.ui64
);
1079 (void) snprintf(ereport_class
, FM_MAX_CLASS
, "%s.%s",
1080 FM_EREPORT_CLASS
, erpt_class
);
1081 if (nvlist_add_string(ereport
, FM_CLASS
, ereport_class
) != 0) {
1082 atomic_inc_64(&erpt_kstat_data
.erpt_set_failed
.value
.ui64
);
1086 if (nvlist_add_uint64(ereport
, FM_EREPORT_ENA
, ena
)) {
1087 atomic_inc_64(&erpt_kstat_data
.erpt_set_failed
.value
.ui64
);
1090 if (nvlist_add_nvlist(ereport
, FM_EREPORT_DETECTOR
,
1091 (nvlist_t
*)detector
) != 0) {
1092 atomic_inc_64(&erpt_kstat_data
.erpt_set_failed
.value
.ui64
);
1095 va_start(ap
, detector
);
1096 name
= va_arg(ap
, const char *);
1097 ret
= i_fm_payload_set(ereport
, name
, ap
);
1101 atomic_inc_64(&erpt_kstat_data
.erpt_set_failed
.value
.ui64
);
1105 * Set-up and validate the members of an hc fmri according to;
1107 * Member name Type Value
1108 * ===================================================
1110 * auth nvlist_t <auth>
1111 * hc-name string <name>
1114 * Note that auth and hc-id are optional members.
1117 #define HC_MAXPAIRS 20
1118 #define HC_MAXNAMELEN 50
1121 fm_fmri_hc_set_common(nvlist_t
*fmri
, int version
, const nvlist_t
*auth
)
1123 if (version
!= FM_HC_SCHEME_VERSION
) {
1124 atomic_inc_64(&erpt_kstat_data
.fmri_set_failed
.value
.ui64
);
1128 if (nvlist_add_uint8(fmri
, FM_VERSION
, version
) != 0 ||
1129 nvlist_add_string(fmri
, FM_FMRI_SCHEME
, FM_FMRI_SCHEME_HC
) != 0) {
1130 atomic_inc_64(&erpt_kstat_data
.fmri_set_failed
.value
.ui64
);
1134 if (auth
!= NULL
&& nvlist_add_nvlist(fmri
, FM_FMRI_AUTHORITY
,
1135 (nvlist_t
*)auth
) != 0) {
1136 atomic_inc_64(&erpt_kstat_data
.fmri_set_failed
.value
.ui64
);
1144 fm_fmri_hc_set(nvlist_t
*fmri
, int version
, const nvlist_t
*auth
,
1145 nvlist_t
*snvl
, int npairs
, ...)
1147 nv_alloc_t
*nva
= nvlist_lookup_nv_alloc(fmri
);
1148 nvlist_t
*pairs
[HC_MAXPAIRS
];
1152 if (!fm_fmri_hc_set_common(fmri
, version
, auth
))
1155 npairs
= MIN(npairs
, HC_MAXPAIRS
);
1157 va_start(ap
, npairs
);
1158 for (i
= 0; i
< npairs
; i
++) {
1159 const char *name
= va_arg(ap
, const char *);
1160 uint32_t id
= va_arg(ap
, uint32_t);
1163 (void) snprintf(idstr
, sizeof (idstr
), "%u", id
);
1165 pairs
[i
] = fm_nvlist_create(nva
);
1166 if (nvlist_add_string(pairs
[i
], FM_FMRI_HC_NAME
, name
) != 0 ||
1167 nvlist_add_string(pairs
[i
], FM_FMRI_HC_ID
, idstr
) != 0) {
1169 &erpt_kstat_data
.fmri_set_failed
.value
.ui64
);
1174 if (nvlist_add_nvlist_array(fmri
, FM_FMRI_HC_LIST
, pairs
, npairs
) != 0)
1175 atomic_inc_64(&erpt_kstat_data
.fmri_set_failed
.value
.ui64
);
1177 for (i
= 0; i
< npairs
; i
++)
1178 fm_nvlist_destroy(pairs
[i
], FM_NVA_RETAIN
);
1181 if (nvlist_add_nvlist(fmri
, FM_FMRI_HC_SPECIFIC
, snvl
) != 0) {
1183 &erpt_kstat_data
.fmri_set_failed
.value
.ui64
);
1189 fm_fmri_hc_create(nvlist_t
*fmri
, int version
, const nvlist_t
*auth
,
1190 nvlist_t
*snvl
, nvlist_t
*bboard
, int npairs
, ...)
1192 nv_alloc_t
*nva
= nvlist_lookup_nv_alloc(fmri
);
1193 nvlist_t
*pairs
[HC_MAXPAIRS
];
1198 char *hcname
, *hcid
;
1200 if (!fm_fmri_hc_set_common(fmri
, version
, auth
))
1204 * copy the bboard nvpairs to the pairs array
1206 if (nvlist_lookup_nvlist_array(bboard
, FM_FMRI_HC_LIST
, &hcl
, &n
)
1208 atomic_inc_64(&erpt_kstat_data
.fmri_set_failed
.value
.ui64
);
1212 for (i
= 0; i
< n
; i
++) {
1213 if (nvlist_lookup_string(hcl
[i
], FM_FMRI_HC_NAME
,
1216 &erpt_kstat_data
.fmri_set_failed
.value
.ui64
);
1219 if (nvlist_lookup_string(hcl
[i
], FM_FMRI_HC_ID
, &hcid
) != 0) {
1221 &erpt_kstat_data
.fmri_set_failed
.value
.ui64
);
1225 pairs
[i
] = fm_nvlist_create(nva
);
1226 if (nvlist_add_string(pairs
[i
], FM_FMRI_HC_NAME
, hcname
) != 0 ||
1227 nvlist_add_string(pairs
[i
], FM_FMRI_HC_ID
, hcid
) != 0) {
1228 for (j
= 0; j
<= i
; j
++) {
1229 if (pairs
[j
] != NULL
)
1230 fm_nvlist_destroy(pairs
[j
],
1234 &erpt_kstat_data
.fmri_set_failed
.value
.ui64
);
1240 * create the pairs from passed in pairs
1242 npairs
= MIN(npairs
, HC_MAXPAIRS
);
1244 va_start(ap
, npairs
);
1245 for (i
= n
; i
< npairs
+ n
; i
++) {
1246 const char *name
= va_arg(ap
, const char *);
1247 uint32_t id
= va_arg(ap
, uint32_t);
1249 (void) snprintf(idstr
, sizeof (idstr
), "%u", id
);
1250 pairs
[i
] = fm_nvlist_create(nva
);
1251 if (nvlist_add_string(pairs
[i
], FM_FMRI_HC_NAME
, name
) != 0 ||
1252 nvlist_add_string(pairs
[i
], FM_FMRI_HC_ID
, idstr
) != 0) {
1253 for (j
= 0; j
<= i
; j
++) {
1254 if (pairs
[j
] != NULL
)
1255 fm_nvlist_destroy(pairs
[j
],
1259 &erpt_kstat_data
.fmri_set_failed
.value
.ui64
);
1266 * Create the fmri hc list
1268 if (nvlist_add_nvlist_array(fmri
, FM_FMRI_HC_LIST
, pairs
,
1270 atomic_inc_64(&erpt_kstat_data
.fmri_set_failed
.value
.ui64
);
1274 for (i
= 0; i
< npairs
+ n
; i
++) {
1275 fm_nvlist_destroy(pairs
[i
], FM_NVA_RETAIN
);
1279 if (nvlist_add_nvlist(fmri
, FM_FMRI_HC_SPECIFIC
, snvl
) != 0) {
1281 &erpt_kstat_data
.fmri_set_failed
.value
.ui64
);
1288 * Set-up and validate the members of an dev fmri according to:
1290 * Member name Type Value
1291 * ====================================================
1293 * auth nvlist_t <auth>
1294 * devpath string <devpath>
1295 * [devid] string <devid>
1296 * [target-port-l0id] string <target-port-lun0-id>
1298 * Note that auth and devid are optional members.
1301 fm_fmri_dev_set(nvlist_t
*fmri_dev
, int version
, const nvlist_t
*auth
,
1302 const char *devpath
, const char *devid
, const char *tpl0
)
1306 if (version
!= DEV_SCHEME_VERSION0
) {
1307 atomic_inc_64(&erpt_kstat_data
.fmri_set_failed
.value
.ui64
);
1311 err
|= nvlist_add_uint8(fmri_dev
, FM_VERSION
, version
);
1312 err
|= nvlist_add_string(fmri_dev
, FM_FMRI_SCHEME
, FM_FMRI_SCHEME_DEV
);
1315 err
|= nvlist_add_nvlist(fmri_dev
, FM_FMRI_AUTHORITY
,
1319 err
|= nvlist_add_string(fmri_dev
, FM_FMRI_DEV_PATH
, devpath
);
1322 err
|= nvlist_add_string(fmri_dev
, FM_FMRI_DEV_ID
, devid
);
1325 err
|= nvlist_add_string(fmri_dev
, FM_FMRI_DEV_TGTPTLUN0
, tpl0
);
1328 atomic_inc_64(&erpt_kstat_data
.fmri_set_failed
.value
.ui64
);
1333 * Set-up and validate the members of an cpu fmri according to:
1335 * Member name Type Value
1336 * ====================================================
1338 * auth nvlist_t <auth>
1339 * cpuid uint32_t <cpu_id>
1340 * cpumask uint8_t <cpu_mask>
1341 * serial uint64_t <serial_id>
1343 * Note that auth, cpumask, serial are optional members.
1347 fm_fmri_cpu_set(nvlist_t
*fmri_cpu
, int version
, const nvlist_t
*auth
,
1348 uint32_t cpu_id
, uint8_t *cpu_maskp
, const char *serial_idp
)
1350 uint64_t *failedp
= &erpt_kstat_data
.fmri_set_failed
.value
.ui64
;
1352 if (version
< CPU_SCHEME_VERSION1
) {
1353 atomic_inc_64(failedp
);
1357 if (nvlist_add_uint8(fmri_cpu
, FM_VERSION
, version
) != 0) {
1358 atomic_inc_64(failedp
);
1362 if (nvlist_add_string(fmri_cpu
, FM_FMRI_SCHEME
,
1363 FM_FMRI_SCHEME_CPU
) != 0) {
1364 atomic_inc_64(failedp
);
1368 if (auth
!= NULL
&& nvlist_add_nvlist(fmri_cpu
, FM_FMRI_AUTHORITY
,
1369 (nvlist_t
*)auth
) != 0)
1370 atomic_inc_64(failedp
);
1372 if (nvlist_add_uint32(fmri_cpu
, FM_FMRI_CPU_ID
, cpu_id
) != 0)
1373 atomic_inc_64(failedp
);
1375 if (cpu_maskp
!= NULL
&& nvlist_add_uint8(fmri_cpu
, FM_FMRI_CPU_MASK
,
1377 atomic_inc_64(failedp
);
1379 if (serial_idp
== NULL
|| nvlist_add_string(fmri_cpu
,
1380 FM_FMRI_CPU_SERIAL_ID
, (char *)serial_idp
) != 0)
1381 atomic_inc_64(failedp
);
1385 * Set-up and validate the members of a mem according to:
1387 * Member name Type Value
1388 * ====================================================
1390 * auth nvlist_t <auth> [optional]
1391 * unum string <unum>
1392 * serial string <serial> [optional*]
1393 * offset uint64_t <offset> [optional]
1395 * * serial is required if offset is present
1398 fm_fmri_mem_set(nvlist_t
*fmri
, int version
, const nvlist_t
*auth
,
1399 const char *unum
, const char *serial
, uint64_t offset
)
1401 if (version
!= MEM_SCHEME_VERSION0
) {
1402 atomic_inc_64(&erpt_kstat_data
.fmri_set_failed
.value
.ui64
);
1406 if (!serial
&& (offset
!= (uint64_t)-1)) {
1407 atomic_inc_64(&erpt_kstat_data
.fmri_set_failed
.value
.ui64
);
1411 if (nvlist_add_uint8(fmri
, FM_VERSION
, version
) != 0) {
1412 atomic_inc_64(&erpt_kstat_data
.fmri_set_failed
.value
.ui64
);
1416 if (nvlist_add_string(fmri
, FM_FMRI_SCHEME
, FM_FMRI_SCHEME_MEM
) != 0) {
1417 atomic_inc_64(&erpt_kstat_data
.fmri_set_failed
.value
.ui64
);
1422 if (nvlist_add_nvlist(fmri
, FM_FMRI_AUTHORITY
,
1423 (nvlist_t
*)auth
) != 0) {
1425 &erpt_kstat_data
.fmri_set_failed
.value
.ui64
);
1429 if (nvlist_add_string(fmri
, FM_FMRI_MEM_UNUM
, unum
) != 0) {
1430 atomic_inc_64(&erpt_kstat_data
.fmri_set_failed
.value
.ui64
);
1433 if (serial
!= NULL
) {
1434 if (nvlist_add_string_array(fmri
, FM_FMRI_MEM_SERIAL_ID
,
1435 (char **)&serial
, 1) != 0) {
1437 &erpt_kstat_data
.fmri_set_failed
.value
.ui64
);
1439 if (offset
!= (uint64_t)-1 && nvlist_add_uint64(fmri
,
1440 FM_FMRI_MEM_OFFSET
, offset
) != 0) {
1442 &erpt_kstat_data
.fmri_set_failed
.value
.ui64
);
1448 fm_fmri_zfs_set(nvlist_t
*fmri
, int version
, uint64_t pool_guid
,
1451 if (version
!= ZFS_SCHEME_VERSION0
) {
1452 atomic_inc_64(&erpt_kstat_data
.fmri_set_failed
.value
.ui64
);
1456 if (nvlist_add_uint8(fmri
, FM_VERSION
, version
) != 0) {
1457 atomic_inc_64(&erpt_kstat_data
.fmri_set_failed
.value
.ui64
);
1461 if (nvlist_add_string(fmri
, FM_FMRI_SCHEME
, FM_FMRI_SCHEME_ZFS
) != 0) {
1462 atomic_inc_64(&erpt_kstat_data
.fmri_set_failed
.value
.ui64
);
1466 if (nvlist_add_uint64(fmri
, FM_FMRI_ZFS_POOL
, pool_guid
) != 0) {
1467 atomic_inc_64(&erpt_kstat_data
.fmri_set_failed
.value
.ui64
);
1470 if (vdev_guid
!= 0) {
1471 if (nvlist_add_uint64(fmri
, FM_FMRI_ZFS_VDEV
, vdev_guid
) != 0) {
1473 &erpt_kstat_data
.fmri_set_failed
.value
.ui64
);
1479 fm_ena_increment(uint64_t ena
)
1483 switch (ENA_FORMAT(ena
)) {
1485 new_ena
= ena
+ (1 << ENA_FMT1_GEN_SHFT
);
1488 new_ena
= ena
+ (1 << ENA_FMT2_GEN_SHFT
);
1498 fm_ena_generate_cpu(uint64_t timestamp
, processorid_t cpuid
, uchar_t format
)
1505 ena
= (uint64_t)((format
& ENA_FORMAT_MASK
) |
1506 ((cpuid
<< ENA_FMT1_CPUID_SHFT
) &
1507 ENA_FMT1_CPUID_MASK
) |
1508 ((timestamp
<< ENA_FMT1_TIME_SHFT
) &
1509 ENA_FMT1_TIME_MASK
));
1511 ena
= (uint64_t)((format
& ENA_FORMAT_MASK
) |
1512 ((cpuid
<< ENA_FMT1_CPUID_SHFT
) &
1513 ENA_FMT1_CPUID_MASK
) |
1514 ((gethrtime() << ENA_FMT1_TIME_SHFT
) &
1515 ENA_FMT1_TIME_MASK
));
1519 ena
= (uint64_t)((format
& ENA_FORMAT_MASK
) |
1520 ((timestamp
<< ENA_FMT2_TIME_SHFT
) & ENA_FMT2_TIME_MASK
));
1530 fm_ena_generate(uint64_t timestamp
, uchar_t format
)
1535 ena
= fm_ena_generate_cpu(timestamp
, getcpuid(), format
);
1542 fm_ena_generation_get(uint64_t ena
)
1546 switch (ENA_FORMAT(ena
)) {
1548 gen
= (ena
& ENA_FMT1_GEN_MASK
) >> ENA_FMT1_GEN_SHFT
;
1551 gen
= (ena
& ENA_FMT2_GEN_MASK
) >> ENA_FMT2_GEN_SHFT
;
1562 fm_ena_format_get(uint64_t ena
)
1565 return (ENA_FORMAT(ena
));
1569 fm_ena_id_get(uint64_t ena
)
1573 switch (ENA_FORMAT(ena
)) {
1575 id
= (ena
& ENA_FMT1_ID_MASK
) >> ENA_FMT1_ID_SHFT
;
1578 id
= (ena
& ENA_FMT2_ID_MASK
) >> ENA_FMT2_ID_SHFT
;
1588 fm_ena_time_get(uint64_t ena
)
1592 switch (ENA_FORMAT(ena
)) {
1594 time
= (ena
& ENA_FMT1_TIME_MASK
) >> ENA_FMT1_TIME_SHFT
;
1597 time
= (ena
& ENA_FMT2_TIME_MASK
) >> ENA_FMT2_TIME_SHFT
;
1608 * Helper function to increment ereport dropped count. Used by the event
1609 * rate limiting code to give feedback to the user about how many events were
1610 * rate limited by including them in the 'dropped' count.
1613 fm_erpt_dropped_increment(void)
1615 atomic_inc_64(&ratelimit_dropped
);
1626 if (zfs_zevent_len_max
== 0)
1627 zfs_zevent_len_max
= ERPT_MAX_ERRS
* MAX(max_ncpus
, 4);
1629 /* Initialize zevent allocation and generation kstats */
1630 fm_ksp
= kstat_create("zfs", 0, "fm", "misc", KSTAT_TYPE_NAMED
,
1631 sizeof (struct erpt_kstat
) / sizeof (kstat_named_t
),
1632 KSTAT_FLAG_VIRTUAL
);
1634 if (fm_ksp
!= NULL
) {
1635 fm_ksp
->ks_data
= &erpt_kstat_data
;
1636 kstat_install(fm_ksp
);
1638 cmn_err(CE_NOTE
, "failed to create fm/misc kstat\n");
1641 mutex_init(&zevent_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
1642 list_create(&zevent_list
, sizeof (zevent_t
),
1643 offsetof(zevent_t
, ev_node
));
1644 cv_init(&zevent_cv
, NULL
, CV_DEFAULT
, NULL
);
1652 zfs_zevent_drain_all(&count
);
1654 mutex_enter(&zevent_lock
);
1655 cv_broadcast(&zevent_cv
);
1657 zevent_flags
|= ZEVENT_SHUTDOWN
;
1658 while (zevent_waiters
> 0) {
1659 mutex_exit(&zevent_lock
);
1661 mutex_enter(&zevent_lock
);
1663 mutex_exit(&zevent_lock
);
1665 cv_destroy(&zevent_cv
);
1666 list_destroy(&zevent_list
);
1667 mutex_destroy(&zevent_lock
);
1669 if (fm_ksp
!= NULL
) {
1670 kstat_delete(fm_ksp
);
1675 module_param(zfs_zevent_len_max
, int, 0644);
1676 MODULE_PARM_DESC(zfs_zevent_len_max
, "Max event queue length");
1678 module_param(zfs_zevent_cols
, int, 0644);
1679 MODULE_PARM_DESC(zfs_zevent_cols
, "Max event column width");
1681 module_param(zfs_zevent_console
, int, 0644);
1682 MODULE_PARM_DESC(zfs_zevent_console
, "Log events to the console");
1684 #endif /* _KERNEL */