diff options
Diffstat (limited to 'qga/commands-bsd.c')
| -rw-r--r-- | qga/commands-bsd.c | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/qga/commands-bsd.c b/qga/commands-bsd.c new file mode 100644 index 0000000000..ca06692179 --- /dev/null +++ b/qga/commands-bsd.c @@ -0,0 +1,169 @@ +/* + * 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 <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 */ |