ssh: add new get_file_obj method to fetch remote files

We can either cat remote files, or we can just sftp get
them.

use sftp get for /proc/cpuinfo since it can be so very large
on systems with 88+ cores.

Change-Id: I420b8c5eefdce8bb3e3b13dcc8257583dee537c1
Signed-off-by: Ross Brattain <ross.b.brattain@intel.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/yardstick/ssh.py b/yardstick/ssh.py
index 8ac3eaa3a..a024cf64a 100644
--- a/yardstick/ssh.py
+++ b/yardstick/ssh.py
@@ -423,6 +423,12 @@ class SSH(object):
             if mode is not None:
                 sftp.chmod(remotepath, mode)
 
+    def get_file_obj(self, remotepath, file_obj):
+        client = self._get_client()
+
+        with client.open_sftp() as sftp:
+            sftp.getfo(remotepath, file_obj)
+
 
 class AutoConnectSSH(SSH):
 
@@ -471,6 +477,10 @@ class AutoConnectSSH(SSH):
         self._connect()
         return super(AutoConnectSSH, self).put_file_obj(file_obj, remote_path, mode)
 
+    def get_file_obj(self, remote_path, file_obj):
+        self._connect()
+        return super(AutoConnectSSH, self).get_file_obj(remote_path, file_obj)
+
     def provision_tool(self, tool_path, tool_file=None):
         self._connect()
         return super(AutoConnectSSH, self).provision_tool(tool_path, tool_file)