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/*
* 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/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>
#if defined(__NetBSD__) || defined(__OpenBSD__)
#include <net/if_arp.h>
#include <netinet/if_ether.h>
#else
#include <net/ethernet.h>
#endif
#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;
}
#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 */
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