not overwriting file_lock structure after GET_LK

If we have preventing lock, cifs should overwrite file_lock structure
with info about preventing lock. If we haven't preventing lock, cifs
should leave it unchanged except for the lock type (change it to F_UNLCK).

Signed-off-by: Pavel Shilovsky <piastryyy@gmail.com>
Reviewed-by: Jeff Layton <jlayton@samba.org>
Signed-off-by: Steve French <sfrench@us.ibm.com>

1 files changed, 14 insertions, 1 deletions

diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index f213b8ae43c1..184a399749a6 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -1810,8 +1810,21 @@ CIFSSMBPosixLock(const int xid, struct cifsTconInfo *tcon,
                 }
                 parm_data = (struct cifs_posix_lock *)
                         ((char *)&pSMBr->hdr.Protocol + data_offset);
-                if (parm_data->lock_type == cpu_to_le16(CIFS_UNLCK))
+                if (parm_data->lock_type == __constant_cpu_to_le16(CIFS_UNLCK))
                         pLockData->fl_type = F_UNLCK;
+                else {
+                        if (parm_data->lock_type ==
+                                        __constant_cpu_to_le16(CIFS_RDLCK))
+                                pLockData->fl_type = F_RDLCK;
+                        else if (parm_data->lock_type ==
+                                        __constant_cpu_to_le16(CIFS_WRLCK))
+                                pLockData->fl_type = F_WRLCK;
+
+                        pLockData->fl_start = parm_data->start;
+                        pLockData->fl_end = parm_data->start +
+                                                parm_data->length - 1;
+                        pLockData->fl_pid = parm_data->pid;
+                }
         }
 
 plk_err_exit: