include/sys/fm/util.h

   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) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
  24  */
  25
  26 #ifndef _SYS_FM_UTIL_H
  27 #define _SYS_FM_UTIL_H
  28
  29 #ifdef  __cplusplus
  30 extern "C" {
  31 #endif
  32
  33 #include <sys/nvpair.h>
  34
  35 /*
  36  * Shared user/kernel definitions for class length, error channel name,
  37  * and kernel event publisher string.
  38  */
  39 #define FM_MAX_CLASS 100
  40 #define FM_ERROR_CHAN   "com.sun:fm:error"
  41 #define FM_PUB          "fm"
  42
  43 /*
  44  * ereport dump device transport support
  45  *
  46  * Ereports are written out to the dump device at a proscribed offset from the
  47  * end, similar to in-transit log messages.  The ereports are represented as a
  48  * erpt_dump_t header followed by ed_size bytes of packed native nvlist data.
  49  *
  50  * NOTE: All of these constants and the header must be defined so they have the
  51  * same representation for *both* 32-bit and 64-bit producers and consumers.
  52  */
  53 #define ERPT_MAGIC      0xf00d4eddU
  54 #define ERPT_MAX_ERRS   16
  55 #define ERPT_DATA_SZ    (6 * 1024)
  56 #define ERPT_EVCH_MAX   256
  57 #define ERPT_HIWAT      64
  58
  59 typedef struct erpt_dump {
  60         uint32_t ed_magic;      /* ERPT_MAGIC or zero to indicate end */
  61         uint32_t ed_chksum;     /* checksum32() of packed nvlist data */
  62         uint32_t ed_size;       /* ereport (nvl) fixed buf size */
  63         uint32_t ed_pad;        /* reserved for future use */
  64         hrtime_t ed_hrt_nsec;   /* hrtime of this ereport */
  65         hrtime_t ed_hrt_base;   /* hrtime sample corresponding to ed_tod_base */
  66         struct {
  67                 uint64_t sec;   /* seconds since gettimeofday() Epoch */
  68                 uint64_t nsec;  /* nanoseconds past ed_tod_base.sec */
  69         } ed_tod_base;
  70 } erpt_dump_t;
  71
  72 #ifdef _KERNEL
  73
  74 #define ZEVENT_SHUTDOWN         0x1
  75
  76 typedef void zevent_cb_t(nvlist_t *, nvlist_t *);
  77
  78 typedef struct zevent_s {
  79         nvlist_t        *ev_nvl;        /* protected by the zevent_lock */
  80         nvlist_t        *ev_detector;   /* " */
  81         list_t          ev_ze_list;     /* " */
  82         list_node_t     ev_node;        /* " */
  83         zevent_cb_t     *ev_cb;         /* " */
  84         uint64_t        ev_eid;
  85 } zevent_t;
  86
  87 typedef struct zfs_zevent {
  88         zevent_t        *ze_zevent;     /* protected by the zevent_lock */
  89         list_node_t     ze_node;        /* " */
  90         uint64_t        ze_dropped;     /* " */
  91 } zfs_zevent_t;
  92
  93 extern void fm_init(void);
  94 extern void fm_fini(void);
  95 extern void fm_nvprint(nvlist_t *);
  96 extern int zfs_zevent_post(nvlist_t *, nvlist_t *, zevent_cb_t *);
  97 extern void zfs_zevent_drain_all(int *);
  98 extern int zfs_zevent_fd_hold(int, minor_t *, zfs_zevent_t **);
  99 extern void zfs_zevent_fd_rele(int);
 100 extern int zfs_zevent_next(zfs_zevent_t *, nvlist_t **, uint64_t *, uint64_t *);
 101 extern int zfs_zevent_wait(zfs_zevent_t *);
 102 extern int zfs_zevent_seek(zfs_zevent_t *, uint64_t);
 103 extern void zfs_zevent_init(zfs_zevent_t **);
 104 extern void zfs_zevent_destroy(zfs_zevent_t *);
 105
 106 #else
 107
 108 static inline void fm_init(void) { }
 109 static inline void fm_fini(void) { }
 110
 111 #endif  /* _KERNEL */
 112
 113 #ifdef  __cplusplus
 114 }
 115 #endif
 116
 117 #endif /* _SYS_FM_UTIL_H */