mgr/smb: Disable posix locking in share definition

The prerequisites for supporting durable handles[1] in Samba include
disabling the mapping of POSIX locks, as well as setting the `kernel
oplocks` and `kernel sharemodes` parameters to disabled. Currently
this configuration is hard‑coded, but in the future it could be made
conditional and combined with other settings to enable persistent
handles on continuously available shares.

[1] https://www.samba.org/samba/docs/current/man-html/smb.conf.5.html#DURABLEHANDLES

Signed-off-by: Anoop C S <[email protected]>

Author: anoopcs9

qa/suites/orch/cephadm/smb/tasks/deploy_smb_basic.yaml

@@ -60,6 +60,7 @@ tasks:
             "disable spoolss" = "yes"
             "guest ok" = "no"
             "smbd profiling level" = "on"
+            "posix locking" = "no"
             [globals.domain.options]
             security = "USER"
             workgroup = "STANDALONE1"

qa/suites/orch/cephadm/smb/tasks/deploy_smb_domain.yaml

@@ -59,6 +59,7 @@ tasks:
           "disable spoolss" = "yes"
           "guest ok" = "no"
           "smbd profiling level" = "on"
+          "posix locking" = "no"
           [globals.domain.options]
           security = "ads"
           workgroup = "DOMAIN1"

src/pybind/mgr/smb/handler.py

@@ -721,6 +721,7 @@ def _generate_share(
             'kernel share modes': 'no',
             'x:ceph:id': f'{share.cluster_id}.{share.share_id}',
             'smbd profiling share': 'yes',
+            'posix locking': 'no',
         }
     }
     if share.comment is not None: