qga: Add guest-fsfreeze-freeze-list command
If an array of mount point paths is specified as 'mountpoints' argument
of guest-fsfreeze-freeze-list, qemu-ga will only freeze the file systems
mounted on specified paths in Linux guests. Otherwise, it works as the
same way as guest-fsfreeze-freeze.
This would be useful when the host wants to create partial disk snapshots.
Signed-off-by: Tomoki Sekiyama <tomoki.sekiyama@hds.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
*updated schema to report 2.2 as initial supported version
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
diff --git a/qga/commands-posix.c b/qga/commands-posix.c
index 8e6272c..883e3c5 100644
--- a/qga/commands-posix.c
+++ b/qga/commands-posix.c
@@ -710,13 +710,21 @@
return GUEST_FSFREEZE_STATUS_THAWED;
}
+int64_t qmp_guest_fsfreeze_freeze(Error **errp)
+{
+ return qmp_guest_fsfreeze_freeze_list(false, NULL, errp);
+}
+
/*
* Walk list of mounted file systems in the guest, and freeze the ones which
* are real local file systems.
*/
-int64_t qmp_guest_fsfreeze_freeze(Error **errp)
+int64_t qmp_guest_fsfreeze_freeze_list(bool has_mountpoints,
+ strList *mountpoints,
+ Error **errp)
{
int ret = 0, i = 0;
+ strList *list;
FsMountList mounts;
struct FsMount *mount;
Error *local_err = NULL;
@@ -741,6 +749,19 @@
ga_set_frozen(ga_state);
QTAILQ_FOREACH_REVERSE(mount, &mounts, FsMountList, 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 (strcmp(list->value, mount->dirname) == 0) {
+ break;
+ }
+ }
+ if (!list) {
+ continue;
+ }
+ }
+
fd = qemu_open(mount->dirname, O_RDONLY);
if (fd == -1) {
error_setg_errno(errp, errno, "failed to open %s", mount->dirname);
@@ -1474,6 +1495,15 @@
return 0;
}
+int64_t qmp_guest_fsfreeze_freeze_list(bool has_mountpoints,
+ strList *mountpoints,
+ Error **errp)
+{
+ error_set(errp, QERR_UNSUPPORTED);
+
+ return 0;
+}
+
int64_t qmp_guest_fsfreeze_thaw(Error **errp)
{
error_set(errp, QERR_UNSUPPORTED);
