When an array of mount point paths is specified as 'mountpoints' argument
of guest-fsfreeze-freeze, qemu-ga with this patch will only freeze the file
systems mounted on specified paths in Linux.
This would be useful when the host wants to create partial disk snapshots.
Signed-off-by: Tomoki Sekiyama <tomoki.sekiy...@hds.com>
---
qga/commands-posix.c | 17 ++++++++++++++++-
qga/commands-win32.c | 3 ++-
qga/qapi-schema.json | 4 ++++
3 files changed, 22 insertions(+), 2 deletions(-)
diff --git a/qga/commands-posix.c b/qga/commands-posix.c
index 34ddba0..771f00c 100644
--- a/qga/commands-posix.c
+++ b/qga/commands-posix.c
@@ -714,9 +714,11 @@ GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **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(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 +743,19 @@ int64_t qmp_guest_fsfreeze_freeze(Error **errp)
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);
diff --git a/qga/commands-win32.c b/qga/commands-win32.c
index d793dd0..0c6296d 100644
--- a/qga/commands-win32.c
+++ b/qga/commands-win32.c
@@ -171,7 +171,8 @@ GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **errp)
* Freeze local file systems using Volume Shadow-copy Service.
* The frozen state is limited for up to 10 seconds by VSS.
*/
-int64_t qmp_guest_fsfreeze_freeze(Error **errp)
+int64_t qmp_guest_fsfreeze_freeze(bool has_mountpoints, strList *mountpoints,
+ Error **errp)
{
int i;
Error *local_err = NULL;
diff --git a/qga/qapi-schema.json b/qga/qapi-schema.json
index a8cdcb3..31c0dc8 100644
--- a/qga/qapi-schema.json
+++ b/qga/qapi-schema.json
@@ -378,12 +378,16 @@
#
# Sync and freeze all freezable, local guest filesystems
#
+# @mountpoints: #optional an array of mountpoints of filesystems to be frozen.
+# If omitted, every mounted filesystem is frozen. (Since: 2.1)
+#
# Returns: Number of file systems currently frozen. On error, all filesystems
# will be thawed.
#
# Since: 0.15.0
##
{ 'command': 'guest-fsfreeze-freeze',
+ 'data': { '*mountpoints': ['str'] },
'returns': 'int' }
##
