mount_cb: do not pass sync and rw options to mount

On FreeBSD, mount_cd9660 does not accept the sync option that is enabled
by default. In addition, the sync is only useful with the `rw` mode.
However the `rw` mode was never used.

This patch removes the `rw` and `sync` parameter of `mount_cb` to
simplify the code base and resolve the FreeBSD issue.

LP: #1645824

3 files changed, 5 insertions, 19 deletions

diff --git a/cloudinit/sources/DataSourceAzure.py b/cloudinit/sources/DataSourceAzure.py
index 76b16616..64165259 100755
--- a/cloudinit/sources/DataSourceAzure.py
+++ b/cloudinit/sources/DataSourceAzure.py
@@ -407,7 +407,7 @@ class DataSourceAzure(sources.DataSource):
                 elif cdev.startswith("/dev/"):
                     if util.is_FreeBSD():
                         ret = util.mount_cb(cdev, load_azure_ds_dir,
-                                            mtype="udf", sync=False)
+                                            mtype="udf")
                     else:
                         ret = util.mount_cb(cdev, load_azure_ds_dir)
                 else:
diff --git a/cloudinit/sources/DataSourceConfigDrive.py b/cloudinit/sources/DataSourceConfigDrive.py
index 564e3eb3..571d30dc 100644
--- a/cloudinit/sources/DataSourceConfigDrive.py
+++ b/cloudinit/sources/DataSourceConfigDrive.py
@@ -72,15 +72,12 @@ class DataSourceConfigDrive(openstack.SourceMixin, sources.DataSource):
             dslist = self.sys_cfg.get('datasource_list')
             for dev in find_candidate_devs(dslist=dslist):
                 try:
-                    # Set mtype if freebsd and turn off sync
-                    if dev.startswith("/dev/cd"):
+                    if util.is_FreeBSD() and dev.startswith("/dev/cd"):
                         mtype = "cd9660"
-                        sync = False
                     else:
                         mtype = None
-                        sync = True
                     results = util.mount_cb(dev, read_config_drive,
-                                            mtype=mtype, sync=sync)
+                                            mtype=mtype)
                     found = dev
                 except openstack.NonReadable:
                     pass
diff --git a/cloudinit/util.py b/cloudinit/util.py
index 385f231c..ea4199cd 100644
--- a/cloudinit/util.py
+++ b/cloudinit/util.py
@@ -1679,7 +1679,7 @@ def mounts():
     return mounted
 
 
-def mount_cb(device, callback, data=None, rw=False, mtype=None, sync=True,
+def mount_cb(device, callback, data=None, mtype=None,
              update_env_for_mount=None):
     """
     Mount the device, call method 'callback' passing the directory
@@ -1726,18 +1726,7 @@ def mount_cb(device, callback, data=None, rw=False, mtype=None, sync=True,
             for mtype in mtypes:
                 mountpoint = None
                 try:
-                    mountcmd = ['mount']
-                    mountopts = []
-                    if rw:
-                        mountopts.append('rw')
-                    else:
-                        mountopts.append('ro')
-                    if sync:
-                        # This seems like the safe approach to do
-                        # (ie where this is on by default)
-                        mountopts.append("sync")
-                    if mountopts:
-                        mountcmd.extend(["-o", ",".join(mountopts)])
+                    mountcmd = ['mount', '-o', 'ro']
                     if mtype:
                         mountcmd.extend(['-t', mtype])
                     mountcmd.append(device)