[CIFS] Add support for readdir to legacy servers

Fixes oops to OS/2 on ls and removes redundant NTCreateX calls to servers
which do not support NT SMBs.  Key operations to OS/2 work.

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

1 files changed, 9 insertions, 2 deletions

diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index e6ed64e94b7b..ba4cbe9b0684 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -178,11 +178,14 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode,
                 FreeXid(xid);
                 return -ENOMEM;
         }
-
-        rc = CIFSSMBOpen(xid, pTcon, full_path, disposition,
+        if (cifs_sb->tcon->ses->capabilities & CAP_NT_SMBS) 
+                rc = CIFSSMBOpen(xid, pTcon, full_path, disposition,
                          desiredAccess, CREATE_NOT_DIR,
                          &fileHandle, &oplock, buf, cifs_sb->local_nls,
                          cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
+        else
+                rc = -EIO; /* no NT SMB support fall into legacy open below */
+
         if(rc == -EIO) {
                 /* old server, retry the open legacy style */
                 rc = SMBLegacyOpen(xid, pTcon, full_path, disposition,
@@ -369,6 +372,10 @@ int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode,
                                          cifs_sb->mnt_cifs_flags & 
                                             CIFS_MOUNT_MAP_SPECIAL_CHR);
 
+                        /* BB FIXME - add handling for backlevel servers
+                           which need legacy open and check for all
+                           calls to SMBOpen for fallback to 
+                           SMBLeagcyOpen */
                         if(!rc) {
                                 /* BB Do not bother to decode buf since no
                                    local inode yet to put timestamps in,