qga: guest-get-memory-blocks shouldn't fail for unexposed memory blocks
Some guests don't expose memory blocks via sysfs at all. This
shouldn't be a failure, instead just return an empty list. For
other access failures we still report an error.
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
diff --git a/qga/commands-posix.c b/qga/commands-posix.c
index a932809..ff0ba62 100644
--- a/qga/commands-posix.c
+++ b/qga/commands-posix.c
@@ -2213,8 +2213,14 @@
dp = opendir("/sys/devices/system/memory/");
if (!dp) {
- error_setg_errno(errp, errno, "Can't open directory"
- "\"/sys/devices/system/memory/\"\n");
+ /* it's ok if this happens to be a system that doesn't expose
+ * memory blocks via sysfs, but otherwise we should report
+ * an error
+ */
+ if (errno != ENOENT) {
+ error_setg_errno(errp, errno, "Can't open directory"
+ "\"/sys/devices/system/memory/\"\n");
+ }
return NULL;
}
