CIFS: Move readdir code to ops struct

Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <smfrench@gmail.com>

fs/cifs/cifsglob.h

@@ -177,6 +177,7 @@ struct cifs_fid;
 struct cifs_readdata;
 struct cifs_writedata;
 struct cifs_io_parms;
+struct cifs_search_info;
 
 struct smb_version_operations {
 	int (*send_cancel)(struct TCP_Server_Info *, void *,
@@ -313,6 +314,20 @@ struct smb_version_operations {
 	int (*sync_write)(const unsigned int, struct cifsFileInfo *,
 			  struct cifs_io_parms *, unsigned int *, struct kvec *,
 			  unsigned long);
+	/* open dir, start readdir */
+	int (*query_dir_first)(const unsigned int, struct cifs_tcon *,
+			       const char *, struct cifs_sb_info *,
+			       struct cifs_fid *, __u16,
+			       struct cifs_search_info *);
+	/* continue readdir */
+	int (*query_dir_next)(const unsigned int, struct cifs_tcon *,
+			      struct cifs_fid *,
+			      __u16, struct cifs_search_info *srch_inf);
+	/* close dir */
+	int (*close_dir)(const unsigned int, struct cifs_tcon *,
+			 struct cifs_fid *);
+	/* calculate a size of SMB message */
+	unsigned int (*calc_smb_size)(void *);
 };
 
 struct smb_version_values {

fs/cifs/cifsproto.h

@@ -100,7 +100,7 @@ extern void cifs_update_eof(struct cifsInodeInfo *cifsi, loff_t offset,
 			    unsigned int bytes_written);
 extern struct cifsFileInfo *find_writable_file(struct cifsInodeInfo *, bool);
 extern struct cifsFileInfo *find_readable_file(struct cifsInodeInfo *, bool);
-extern unsigned int smbCalcSize(struct smb_hdr *ptr);
+extern unsigned int smbCalcSize(void *buf);
 extern int decode_negTokenInit(unsigned char *security_blob, int length,
 			struct TCP_Server_Info *server);
 extern int cifs_convert_address(struct sockaddr *dst, const char *src, int len);

fs/cifs/file.c

@@ -618,39 +618,47 @@ int cifs_closedir(struct inode *inode, struct file *file)
 	int rc = 0;
 	unsigned int xid;
 	struct cifsFileInfo *cfile = file->private_data;
-	char *tmp;
+	struct cifs_tcon *tcon;
+	struct TCP_Server_Info *server;
+	char *buf;
 
 	cFYI(1, "Closedir inode = 0x%p", inode);
 
-	xid = get_xid();
+	if (cfile == NULL)
+		return rc;
 
-	if (cfile) {
-		struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
+	xid = get_xid();
+	tcon = tlink_tcon(cfile->tlink);
+	server = tcon->ses->server;
 
 	cFYI(1, "Freeing private data in close dir");
 	spin_lock(&cifs_file_list_lock);
 	if (!cfile->srch_inf.endOfSearch && !cfile->invalidHandle) {
 		cfile->invalidHandle = true;
 		spin_unlock(&cifs_file_list_lock);
-			rc = CIFSFindClose(xid, tcon, cfile->fid.netfid);
+		if (server->ops->close_dir)
+			rc = server->ops->close_dir(xid, tcon, &cfile->fid);
+		else
+			rc = -ENOSYS;
 		cFYI(1, "Closing uncompleted readdir with rc %d", rc);
 		/* not much we can do if it fails anyway, ignore rc */
 		rc = 0;
 	} else
 		spin_unlock(&cifs_file_list_lock);
-		tmp = cfile->srch_inf.ntwrk_buf_start;
-		if (tmp) {
+
+	buf = cfile->srch_inf.ntwrk_buf_start;
+	if (buf) {
 		cFYI(1, "closedir free smb buf in srch struct");
 		cfile->srch_inf.ntwrk_buf_start = NULL;
 		if (cfile->srch_inf.smallBuf)
-				cifs_small_buf_release(tmp);
+			cifs_small_buf_release(buf);
 		else
-				cifs_buf_release(tmp);
+			cifs_buf_release(buf);
 	}
+
 	cifs_put_tlink(cfile->tlink);
 	kfree(file->private_data);
 	file->private_data = NULL;
-	}
 	/* BB can we lock the filestruct while this is going on? */
 	free_xid(xid);
 	return rc;

fs/cifs/netmisc.c

@@ -913,8 +913,9 @@ map_smb_to_linux_error(char *buf, bool logErr)
  * portion, the number of word parameters and the data portion of the message
  */
 unsigned int
-smbCalcSize(struct smb_hdr *ptr)
+smbCalcSize(void *buf)
 {
+	struct smb_hdr *ptr = (struct smb_hdr *)buf;
 	return (sizeof(struct smb_hdr) + (2 * ptr->WordCount) +
 		2 /* size of the bcc field */ + get_bcc(ptr));
 }

fs/cifs/smb1ops.c

@@ -836,6 +836,33 @@ smb_set_file_info(struct inode *inode, const char *full_path,
 	return rc;
 }
 
+static int
+cifs_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
+		     const char *path, struct cifs_sb_info *cifs_sb,
+		     struct cifs_fid *fid, __u16 search_flags,
+		     struct cifs_search_info *srch_inf)
+{
+	return CIFSFindFirst(xid, tcon, path, cifs_sb->local_nls,
+			     &fid->netfid, search_flags, srch_inf,
+			     cifs_sb->mnt_cifs_flags &
+			     CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb));
+}
+
+static int
+cifs_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
+		    struct cifs_fid *fid, __u16 search_flags,
+		    struct cifs_search_info *srch_inf)
+{
+	return CIFSFindNext(xid, tcon, fid->netfid, search_flags, srch_inf);
+}
+
+static int
+cifs_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
+	       struct cifs_fid *fid)
+{
+	return CIFSFindClose(xid, tcon, fid->netfid);
+}
+
 struct smb_version_operations smb1_operations = {
 	.send_cancel = send_nt_cancel,
 	.compare_fids = cifs_compare_fids,
@@ -891,6 +918,10 @@ struct smb_version_operations smb1_operations = {
 	.async_writev = cifs_async_writev,
 	.sync_read = cifs_sync_read,
 	.sync_write = cifs_sync_write,
+	.query_dir_first = cifs_query_dir_first,
+	.query_dir_next = cifs_query_dir_next,
+	.close_dir = cifs_close_dir,
+	.calc_smb_size = smbCalcSize,
 };
 
 struct smb_version_values smb1_values = {