[CIFS] Add compat with SFU (part 2)

Creating FIFOs to non-Unix servers (with cifs mounts for which sfu option
was specified) now works.

Signed-off-by: Steve French (sfrench@us.ibm.com)

Thanks to Martin Koeppe for his assistance

1 files changed, 30 insertions, 4 deletions

diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index 0d5e27fec92b..c0f20fc09290 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -327,13 +327,39 @@ int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode, dev_t dev
                                 d_instantiate(direntry, newinode);
                 }
         } else {
-                if((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) && 
-                        (special_file(mode))) {
+                if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
+                        int oplock = 0;
+                        u16 fileHandle;
+                        FILE_ALL_INFO * buf;
 
                         cFYI(1,("sfu compat create special file"));
-                        /*      Attributes = cpu_to_le32(ATTR_SYSTEM); 
-                                rc = CIFSSMBOpen(xid, pTcon, full_path, disposition, ...); */
 
+                        buf = kmalloc(sizeof(FILE_ALL_INFO),GFP_KERNEL);
+                        if(buf == NULL) {
+                                kfree(full_path);
+                                FreeXid(xid);
+                                return -ENOMEM;
+                        }
+
+                        rc = CIFSSMBOpen(xid, pTcon, full_path,
+                                         FILE_CREATE, /* fail if exists */
+                                         GENERIC_WRITE /* BB would 
+                                          WRITE_OWNER | WRITE_DAC be better? */,
+                                         /* Create a file and set the
+                                            file attribute to SYSTEM */
+                                         CREATE_NOT_DIR | CREATE_OPTION_SPECIAL,
+                                         &fileHandle, &oplock, buf,
+                                         cifs_sb->local_nls,
+                                         cifs_sb->mnt_cifs_flags & 
+                                            CIFS_MOUNT_MAP_SPECIAL_CHR);
+
+                        if(!rc) {
+                                /* BB Do not bother to decode buf since no
+                                   local inode yet to put timestamps in */
+                                CIFSSMBClose(xid, pTcon, fileHandle);
+                                d_drop(direntry);
+                        }
+                        kfree(buf);
                         /* add code here to set EAs */
                 }
         }