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
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
|
/*
* QEMU Guest Agent BSD-specific command implementations
*
* Copyright (c) Virtuozzo International GmbH.
*
* Authors:
* Alexander Ivanov <alexander.ivanov@virtuozzo.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "qga-qapi-commands.h"
#include "qapi/qmp/qerror.h"
#include "qapi/error.h"
#include "qemu/queue.h"
#include "commands-common.h"
#include <sys/ioctl.h>
#include <sys/param.h>
#include <sys/ucred.h>
#include <sys/mount.h>
#include <net/if_dl.h>
#include <net/ethernet.h>
#include <paths.h>
#if defined(CONFIG_FSFREEZE) || defined(CONFIG_FSTRIM)
bool build_fs_mount_list(FsMountList *mounts, Error **errp)
{
FsMount *mount;
struct statfs *mntbuf, *mntp;
struct stat statbuf;
int i, count, ret;
count = getmntinfo(&mntbuf, MNT_NOWAIT);
if (count == 0) {
error_setg_errno(errp, errno, "getmntinfo failed");
return false;
}
for (i = 0; i < count; i++) {
mntp = &mntbuf[i];
ret = stat(mntp->f_mntonname, &statbuf);
if (ret != 0) {
error_setg_errno(errp, errno, "stat failed on %s",
mntp->f_mntonname);
return false;
}
mount = g_new0(FsMount, 1);
mount->dirname = g_strdup(mntp->f_mntonname);
mount->devtype = g_strdup(mntp->f_fstypename);
mount->devmajor = major(mount->dev);
mount->devminor = minor(mount->dev);
mount->fsid = mntp->f_fsid;
mount->dev = statbuf.st_dev;
QTAILQ_INSERT_TAIL(mounts, mount, next);
}
return true;
}
#endif /* CONFIG_FSFREEZE || CONFIG_FSTRIM */
#if defined(CONFIG_FSFREEZE)
static int ufssuspend_fd = -1;
static int ufssuspend_cnt;
int64_t qmp_guest_fsfreeze_do_freeze_list(bool has_mountpoints,
strList *mountpoints,
FsMountList mounts,
Error **errp)
{
int ret;
strList *list;
struct FsMount *mount;
if (ufssuspend_fd != -1) {
error_setg(errp, "filesystems have already frozen");
return -1;
}
ufssuspend_cnt = 0;
ufssuspend_fd = qemu_open(_PATH_UFSSUSPEND, O_RDWR, errp);
if (ufssuspend_fd == -1) {
return -1;
}
QTAILQ_FOREACH_REVERSE(mount, &mounts, next) {
/*
* To issue fsfreeze in the reverse order of mounts, check if the
* mount is listed in the list here
*/
if (has_mountpoints) {
for (list = mountpoints; list; list = list->next) {
if (g_str_equal(list->value, mount->dirname)) {
break;
}
}
if (!list) {
continue;
}
}
/* Only UFS supports suspend */
if (!g_str_equal(mount->devtype, "ufs")) {
continue;
}
ret = ioctl(ufssuspend_fd, UFSSUSPEND, &mount->fsid);
if (ret == -1) {
/*
* ioctl returns EBUSY for all the FS except the first one
* that was suspended
*/
if (errno == EBUSY) {
continue;
}
error_setg_errno(errp, errno, "failed to freeze %s",
mount->dirname);
goto error;
}
ufssuspend_cnt++;
}
return ufssuspend_cnt;
error:
close(ufssuspend_fd);
ufssuspend_fd = -1;
return -1;
}
/*
* We don't need to call UFSRESUME ioctl because all the frozen FS
* are thawed on /dev/ufssuspend closing.
*/
int qmp_guest_fsfreeze_do_thaw(Error **errp)
{
int ret = ufssuspend_cnt;
ufssuspend_cnt = 0;
if (ufssuspend_fd != -1) {
close(ufssuspend_fd);
ufssuspend_fd = -1;
}
return ret;
}
GuestFilesystemInfoList *qmp_guest_get_fsinfo(Error **errp)
{
error_setg(errp, QERR_UNSUPPORTED);
return NULL;
}
GuestDiskInfoList *qmp_guest_get_disks(Error **errp)
{
error_setg(errp, QERR_UNSUPPORTED);
return NULL;
}
GuestDiskStatsInfoList *qmp_guest_get_diskstats(Error **errp)
{
error_setg(errp, QERR_UNSUPPORTED);
return NULL;
}
GuestCpuStatsList *qmp_guest_get_cpustats(Error **errp)
{
error_setg(errp, QERR_UNSUPPORTED);
return NULL;
}
#endif /* CONFIG_FSFREEZE */
#ifdef HAVE_GETIFADDRS
/*
* Fill "buf" with MAC address by ifaddrs. Pointer buf must point to a
* buffer with ETHER_ADDR_LEN length at least.
*
* Returns false in case of an error, otherwise true. "obtained" arguument
* is true if a MAC address was obtained successful, otherwise false.
*/
bool guest_get_hw_addr(struct ifaddrs *ifa, unsigned char *buf,
bool *obtained, Error **errp)
{
struct sockaddr_dl *sdp;
*obtained = false;
if (ifa->ifa_addr->sa_family != AF_LINK) {
/* We can get HW address only for AF_LINK family. */
g_debug("failed to get MAC address of %s", ifa->ifa_name);
return true;
}
sdp = (struct sockaddr_dl *)ifa->ifa_addr;
memcpy(buf, sdp->sdl_data + sdp->sdl_nlen, ETHER_ADDR_LEN);
*obtained = true;
return true;
}
#endif /* HAVE_GETIFADDRS */
|
