@@ -26,6 +26,7 @@ class QOMFS(Fuse):
self.qmp.connect()
self.ino_map = {}
self.ino_count = 1
+ self.prop_cache = {}
def get_ino(self, path):
if self.ino_map.has_key(path):
@@ -67,12 +68,16 @@ class QOMFS(Fuse):
if not self.is_property(path):
return -ENOENT
- path, prop = path.rsplit('/', 1)
- try:
- data = str(self.qmp.command('qom-get', path=path, property=prop))
- data += '\n' # make values shell friendly
- except:
- return -EPERM
+ # avoid extra calls to qom-get by using cached value when offset > 0
+ if offset == 0 or not self.prop_cache.has_key(path):
+ directory, prop = path.rsplit('/', 1)
+ try:
+ resp = str(self.qmp.command('qom-get', path=directory, property=prop))
+ self.prop_cache[path] = resp + '\n' # make values shell friendly
+ except:
+ return -EPERM
+
+ data = self.prop_cache[path]
if offset > len(data):
return ''
@@ -111,13 +116,18 @@ class QOMFS(Fuse):
0,
0))
elif self.is_property(path):
+ directory, prop = path.rsplit('/', 1)
+ try:
+ resp = str(self.qmp.command('qom-get', path=directory, property=prop))
+ except:
+ return -ENOENT
value = posix.stat_result((0644 | stat.S_IFREG,
self.get_ino(path),
0,
1,
1000,
1000,
- 4096,
+ max(len(resp) * 2, 4096),
0,
0,
0))