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qga: unset frozen state if no mount points are frozen 

If we set mountpoints to qmp_guest_fsfreeze_freeze_list,
we may got nothing to freeze as all mountpoints are
not valid.
So call ga_unset_frozen in this senario.

Also, if we return 0 frozen fs, there is no need to call
guest-fsfreeze-thaw.

Cc: Michael Roth <mdroth@linux.vnet.ibm.com>
Signed-off-by: Chen Hanxiao <chenhanxiao@gmail.com>
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
This commit is contained in:
Chen Hanxiao 2018-06-14 16:10:13 +08:00 committed by Michael Roth
parent b07cd3e748
commit 65650f0182
2 changed files with 9 additions and 1 deletions
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6
qga/commands-posix.c
View File

@ -1274,6 +1274,12 @@ int64_t qmp_guest_fsfreeze_freeze_list(bool has_mountpoints,
}
free_fs_mount_list(&mounts);
/* We may not issue any FIFREEZE here.
* Just unset ga_state here and ready for the next call.
*/
if (i == 0) {
ga_unset_frozen(ga_state);
}
return i;
error:

4
qga/qapi-schema.json
View File

@ -435,7 +435,9 @@
# for up to 10 seconds by VSS.
#
# Returns: Number of file systems currently frozen. On error, all filesystems
# will be thawed.
# will be thawed. If no filesystems are frozen as a result of this call,
# then @guest-fsfreeze-status will remain "thawed" and calling
# @guest-fsfreeze-thaw is not necessary.
#
# Since: 0.15.0
##