[CIFS] on reconnect to Samba - reset the unix capabilities

After temporary server or network failure and reconneciton, we were not
resending the unix capabilities via SetFSInfo - which confused Samba posix
byte range locking code.

Discovered by jra

Signed-off-by: Steve French <sfrench@us.ibm.com>

1 files changed, 14 insertions, 2 deletions

diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index 472e33e0f3cf..b8e91470c27f 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -158,9 +158,15 @@ small_smb_init(int smb_command, int wct, struct cifsTconInfo *tcon,
                                                         nls_codepage);
                         if(!rc && (tcon->tidStatus == CifsNeedReconnect)) {
                                 mark_open_files_invalid(tcon);
-                                rc = CIFSTCon(0, tcon->ses, tcon->treeName, tcon
-                                        , nls_codepage);
+                                rc = CIFSTCon(0, tcon->ses, tcon->treeName, 
+                                              tcon, nls_codepage);
                                 up(&tcon->ses->sesSem);
+                                /* tell server which Unix caps we support */
+                                if (tcon->ses->capabilities & CAP_UNIX)
+                                        reset_cifs_unix_caps(0 /* no xid */,
+                                                tcon, 
+                                                NULL /* we do not know sb */,
+                                                NULL /* no vol info */);        
                                 /* BB FIXME add code to check if wsize needs
                                    update due to negotiated smb buffer size
                                    shrinking */
@@ -298,6 +304,12 @@ smb_init(int smb_command, int wct, struct cifsTconInfo *tcon,
                                 rc = CIFSTCon(0, tcon->ses, tcon->treeName,
                                               tcon, nls_codepage);
                                 up(&tcon->ses->sesSem);
+                                /* tell server which Unix caps we support */
+                                if (tcon->ses->capabilities & CAP_UNIX)
+                                        reset_cifs_unix_caps(0 /* no xid */,
+                                                tcon, 
+                                                NULL /* do not know sb */,
+                                                NULL /* no vol info */);
                                 /* BB FIXME add code to check if wsize needs
                                 update due to negotiated smb buffer size
                                 shrinking */