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
152
153
154
155
156
|
#define _SYSTEM 1
#include <minix/callnr.h>
#include <minix/com.h>
#include <minix/config.h>
#include <minix/const.h>
#include <minix/ds.h>
#include <minix/endpoint.h>
#include <minix/minlib.h>
#include <minix/type.h>
#include <minix/ipc.h>
#include <minix/sysutil.h>
#include <minix/syslib.h>
#include <minix/bitmap.h>
#include <errno.h>
#include <assert.h>
#include "glo.h"
#include "proto.h"
#include "util.h"
#include "sanitycheck.h"
static void reset_vm_rusage(struct vmproc *vmp)
{
vmp->vm_total = 0;
vmp->vm_total_max = 0;
vmp->vm_minor_page_fault = 0;
vmp->vm_major_page_fault = 0;
}
void free_proc(struct vmproc *vmp)
{
map_free_proc(vmp);
pt_free(&vmp->vm_pt);
region_init(&vmp->vm_regions_avl);
#if VMSTATS
vmp->vm_bytecopies = 0;
#endif
vmp->vm_region_top = 0;
reset_vm_rusage(vmp);
}
void clear_proc(struct vmproc *vmp)
{
region_init(&vmp->vm_regions_avl);
acl_clear(vmp);
vmp->vm_flags = 0; /* Clear INUSE, so slot is free. */
#if VMSTATS
vmp->vm_bytecopies = 0;
#endif
vmp->vm_region_top = 0;
reset_vm_rusage(vmp);
}
/*===========================================================================*
* do_exit *
*===========================================================================*/
int do_exit(message *msg)
{
int proc;
struct vmproc *vmp;
SANITYCHECK(SCL_FUNCTIONS);
if(vm_isokendpt(msg->VME_ENDPOINT, &proc) != OK) {
printf("VM: bogus endpoint VM_EXIT %d\n", msg->VME_ENDPOINT);
return EINVAL;
}
vmp = &vmproc[proc];
if(!(vmp->vm_flags & VMF_EXITING)) {
printf("VM: unannounced VM_EXIT %d\n", msg->VME_ENDPOINT);
return EINVAL;
}
if(vmp->vm_flags & VMF_VM_INSTANCE) {
vmp->vm_flags &= ~VMF_VM_INSTANCE;
num_vm_instances--;
}
{
/* Free pagetable and pages allocated by pt code. */
SANITYCHECK(SCL_DETAIL);
free_proc(vmp);
SANITYCHECK(SCL_DETAIL);
}
SANITYCHECK(SCL_DETAIL);
/* Reset process slot fields. */
clear_proc(vmp);
SANITYCHECK(SCL_FUNCTIONS);
return OK;
}
/*===========================================================================*
* do_willexit *
*===========================================================================*/
int do_willexit(message *msg)
{
int proc;
struct vmproc *vmp;
if(vm_isokendpt(msg->VMWE_ENDPOINT, &proc) != OK) {
printf("VM: bogus endpoint VM_EXITING %d\n",
msg->VMWE_ENDPOINT);
return EINVAL;
}
vmp = &vmproc[proc];
vmp->vm_flags |= VMF_EXITING;
return OK;
}
int do_procctl(message *msg, int transid)
{
endpoint_t proc;
struct vmproc *vmp;
if(vm_isokendpt(msg->VMPCTL_WHO, &proc) != OK) {
printf("VM: bogus endpoint VM_PROCCTL %ld\n",
msg->VMPCTL_WHO);
return EINVAL;
}
vmp = &vmproc[proc];
switch(msg->VMPCTL_PARAM) {
case VMPPARAM_CLEAR:
if(msg->m_source != RS_PROC_NR
&& msg->m_source != VFS_PROC_NR)
return EPERM;
free_proc(vmp);
if(pt_new(&vmp->vm_pt) != OK)
panic("VMPPARAM_CLEAR: pt_new failed");
pt_bind(&vmp->vm_pt, vmp);
return OK;
case VMPPARAM_HANDLEMEM:
{
if(msg->m_source != VFS_PROC_NR)
return EPERM;
handle_memory_start(vmp, msg->VMPCTL_M1,
msg->VMPCTL_LEN, msg->VMPCTL_FLAGS,
VFS_PROC_NR, VFS_PROC_NR, transid, 1);
return SUSPEND;
}
default:
return EINVAL;
}
return OK;
}
|
