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 /* 24 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 25 * Use is subject to license terms. 26 */ 27 28 #ifndef _FMD_USTAT_H 29 #define _FMD_USTAT_H 30 31 #include <pthread.h> 32 33 #ifdef __cplusplus 34 extern "C" { 35 #endif 36 37 #include <fmd_api.h> 38 #include <fmd_list.h> 39 40 typedef struct fmd_ustat_snap { 41 fmd_stat_t *uss_buf; /* array of statistic data */ 42 uint_t uss_len; /* length of uss_buf array */ 43 } fmd_ustat_snap_t; 44 45 typedef struct fmd_ustat_chunk { 46 fmd_list_t usc_list; /* linked list next/prev pointers */ 47 fmd_stat_t *usc_base; /* base of chunk allocation */ 48 uint_t usc_len; /* number of stat structs in chunk */ 49 uint_t usc_refs; /* reference count on chunk */ 50 } fmd_ustat_chunk_t; 51 52 typedef struct fmd_ustat_elem { 53 struct fmd_ustat_elem *use_next; /* pointer to next statistic in hash */ 54 const fmd_stat_t *use_stat; /* pointer to statistic data storage */ 55 fmd_ustat_chunk_t *use_chunk; /* pointer to alloc chunk (or NULL) */ 56 } fmd_ustat_elem_t; 57 58 typedef struct fmd_ustat { 59 pthread_rwlock_t us_lock; /* lock protecting ustat collection */ 60 fmd_list_t us_chunks; /* linked list of allocation chunks */ 61 fmd_ustat_elem_t **us_hash; /* hash bucket array of stat elements */ 62 uint_t us_hashlen; /* length of us_hash bucket array */ 63 uint_t us_nelems; /* number of elements in collection */ 64 } fmd_ustat_t; 65 66 extern fmd_ustat_t *fmd_ustat_create(void); 67 extern void fmd_ustat_destroy(fmd_ustat_t *); 68 extern int fmd_ustat_snapshot(fmd_ustat_t *, fmd_ustat_snap_t *); 69 70 #define FMD_USTAT_NOALLOC 0x0 /* fmd should use caller's memory */ 71 #define FMD_USTAT_ALLOC 0x1 /* fmd should allocate stats memory */ 72 #define FMD_USTAT_VALIDATE 0x2 /* fmd should validate stat names */ 73 74 #if FMD_STAT_NOALLOC != FMD_USTAT_NOALLOC 75 #error "FMD_STAT_NOALLOC must match FMD_USTAT_NOALLOC" 76 #endif 77 78 #if FMD_STAT_ALLOC != FMD_USTAT_ALLOC 79 #error "FMD_STAT_ALLOC must match FMD_USTAT_ALLOC" 80 #endif 81 82 extern fmd_stat_t *fmd_ustat_insert(fmd_ustat_t *, 83 uint_t, uint_t, fmd_stat_t *, fmd_stat_t **); 84 85 extern void fmd_ustat_delete(fmd_ustat_t *, uint_t, fmd_stat_t *); 86 extern void fmd_ustat_delete_references(fmd_ustat_t *); 87 88 #ifdef __cplusplus 89 } 90 #endif 91 92 #endif /* _FMD_USTAT_H */ 93