teuthology: Add support for seek and sync in write_file

Signed-off-by: Christopher Hoffman <[email protected]>

teuthology/misc.py

@@ -512,15 +512,18 @@ def gen_addresses():
     return fsid
 
 
-def write_file(remote, path, data):
+def write_file(remote, path, data, bs=None, offset=None, sync=False):
     """
     Write data to a remote file
 
     :param remote: Remote site.
     :param path: Path on the remote being written to.
     :param data: Data to be written.
+    :param bs: The block size to be used.
+    :param offset: The number of bytes to seek to in file.
+    :param sync: Sync file.
     """
-    remote.write_file(path, data)
+    remote.write_file(path, data, bs=bs, offset=offset, sync=sync)
 
 
 def sudo_write_file(remote, path, data, perms=None, owner=None):

teuthology/orchestra/remote.py

@@ -265,7 +265,8 @@ def read_file(self, path, sudo=False, stdout=None,
 
 
     def write_file(self, path, data, sudo=False, mode=None, owner=None,
-                                     mkdir=False, append=False):
+                                     mkdir=False, append=False, bs=None,
+                                     offset=None, sync=False):
         """
         Write data to remote file
 
@@ -276,11 +277,20 @@ def write_file(self, path, data, sudo=False, mode=None, owner=None,
         :param owner:   set file owner if provided
         :param mkdir:   preliminary create the file directory, defaults False
         :param append:  append data to the file, defaults False
+        :param bs:      block size
+        :param offset:  number of bytes to seek to in file
+        :param sync:    sync file
         """
         dd = 'sudo dd' if sudo else 'dd'
         args = dd + ' of=' + path
         if append:
             args += ' conv=notrunc oflag=append'
+        if bs:
+            args += ' bs=' + str(bs)
+        if offset:
+            args += ' seek=' + str(offset)
+        if sync:
+            args += ' conv=sync'
         if mkdir:
             mkdirp = 'sudo mkdir -p' if sudo else 'mkdir -p'
             dirpath = os.path.dirname(path)