1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
|
/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2011 NetApp, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <machine/vmm.h>
#include <dev/vmm/vmm_stat.h>
/*
* 'vst_num_elems' is the total number of addressable statistic elements
* 'vst_num_types' is the number of unique statistic types
*
* It is always true that 'vst_num_elems' is greater than or equal to
* 'vst_num_types'. This is because a stat type may represent more than
* one element (for e.g. VMM_STAT_ARRAY).
*/
static int vst_num_elems, vst_num_types;
static struct vmm_stat_type *vsttab[MAX_VMM_STAT_ELEMS];
static MALLOC_DEFINE(M_VMM_STAT, "vmm stat", "vmm stat");
#define vst_size ((size_t)vst_num_elems * sizeof(uint64_t))
void
vmm_stat_register(void *arg)
{
struct vmm_stat_type *vst = arg;
/* We require all stats to identify themselves with a description */
if (vst->desc == NULL)
return;
if (vst->pred != NULL && !vst->pred())
return;
if (vst_num_elems + vst->nelems >= MAX_VMM_STAT_ELEMS) {
printf("Cannot accommodate vmm stat type \"%s\"!\n", vst->desc);
return;
}
vst->index = vst_num_elems;
vst_num_elems += vst->nelems;
vsttab[vst_num_types++] = vst;
}
int
vmm_stat_copy(struct vcpu *vcpu, int index, int count, int *num_stats,
uint64_t *buf)
{
struct vmm_stat_type *vst;
uint64_t *stats;
int i, tocopy;
if (index < 0 || count < 0)
return (EINVAL);
if (index > vst_num_elems)
return (ENOENT);
if (index == vst_num_elems) {
*num_stats = 0;
return (0);
}
tocopy = min(vst_num_elems - index, count);
/* Let stats functions update their counters */
for (i = 0; i < vst_num_types; i++) {
vst = vsttab[i];
if (vst->func != NULL)
(*vst->func)(vcpu, vst);
}
/* Copy over the stats */
stats = vcpu_stats(vcpu);
memcpy(buf, stats + index, tocopy * sizeof(stats[0]));
*num_stats = tocopy;
return (0);
}
void *
vmm_stat_alloc(void)
{
return (malloc(vst_size, M_VMM_STAT, M_WAITOK));
}
void
vmm_stat_init(void *vp)
{
bzero(vp, vst_size);
}
void
vmm_stat_free(void *vp)
{
free(vp, M_VMM_STAT);
}
int
vmm_stat_desc_copy(int index, char *buf, int bufsize)
{
int i;
struct vmm_stat_type *vst;
for (i = 0; i < vst_num_types; i++) {
vst = vsttab[i];
if (index >= vst->index && index < vst->index + vst->nelems) {
if (vst->nelems > 1) {
snprintf(buf, bufsize, "%s[%d]",
vst->desc, index - vst->index);
} else {
strlcpy(buf, vst->desc, bufsize);
}
return (0); /* found it */
}
}
return (EINVAL);
}
|
