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authorTomoki Sekiyama <tomoki.sekiyama@hds.com>2014-06-30 17:51:27 -0400
committerMichael Roth <mdroth@linux.vnet.ibm.com>2014-08-07 17:13:10 -0500
commite99bce2021d2fd41a4d02f5e7e83734b03ff2b6f (patch)
treea3c6fc8d072ef3d9b62858e289049074ee3ac56a
parent2ee55b8351910e5dd898f52415064a4c5479baba (diff)
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>
-rw-r--r--qga/commands-posix.c32
-rw-r--r--qga/commands-win32.c9
-rw-r--r--qga/qapi-schema.json17
3 files changed, 57 insertions, 1 deletions
diff --git a/qga/commands-posix.c b/qga/commands-posix.c
index 8e6272c5a2..883e3c50fd 100644
--- a/qga/commands-posix.c
+++ b/qga/commands-posix.c
@@ -710,13 +710,21 @@ GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **errp)
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 @@ 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);
@@ -1474,6 +1495,15 @@ int64_t qmp_guest_fsfreeze_freeze(Error **errp)
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);
diff --git a/qga/commands-win32.c b/qga/commands-win32.c
index e76939651a..94877e9326 100644
--- a/qga/commands-win32.c
+++ b/qga/commands-win32.c
@@ -206,6 +206,15 @@ error:
return 0;
}
+int64_t qmp_guest_fsfreeze_freeze_list(bool has_mountpoints,
+ strList *mountpoints,
+ Error **errp)
+{
+ error_set(errp, QERR_UNSUPPORTED);
+
+ return 0;
+}
+
/*
* Thaw local file systems using Volume Shadow-copy Service.
*/
diff --git a/qga/qapi-schema.json b/qga/qapi-schema.json
index a8cdcb35c4..14b2aec69f 100644
--- a/qga/qapi-schema.json
+++ b/qga/qapi-schema.json
@@ -387,6 +387,23 @@
'returns': 'int' }
##
+# @guest-fsfreeze-freeze-list:
+#
+# Sync and freeze specified guest filesystems
+#
+# @mountpoints: #optional an array of mountpoints of filesystems to be frozen.
+# If omitted, every mounted filesystem is frozen.
+#
+# Returns: Number of file systems currently frozen. On error, all filesystems
+# will be thawed.
+#
+# Since: 2.2
+##
+{ 'command': 'guest-fsfreeze-freeze-list',
+ 'data': { '*mountpoints': ['str'] },
+ 'returns': 'int' }
+
+##
# @guest-fsfreeze-thaw:
#
# Unfreeze all frozen guest filesystems