CIFS: Add open/close file support for SMB2

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

1 files changed, 86 insertions, 0 deletions

diff --git a/fs/cifs/smb2file.c b/fs/cifs/smb2file.c
new file mode 100644
index 000000000000..a7618dfb7712
--- /dev/null
+++ b/fs/cifs/smb2file.c
@@ -0,0 +1,86 @@
+/*
+ *   fs/cifs/smb2file.c
+ *
+ *   Copyright (C) International Business Machines  Corp., 2002, 2011
+ *   Author(s): Steve French (sfrench@us.ibm.com),
+ *              Pavel Shilovsky ((pshilovsky@samba.org) 2012
+ *
+ *   This library is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU Lesser General Public License as published
+ *   by the Free Software Foundation; either version 2.1 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This library is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ *   the GNU Lesser General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Lesser General Public License
+ *   along with this library; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#include <linux/fs.h>
+#include <linux/stat.h>
+#include <linux/slab.h>
+#include <linux/pagemap.h>
+#include <asm/div64.h>
+#include "cifsfs.h"
+#include "cifspdu.h"
+#include "cifsglob.h"
+#include "cifsproto.h"
+#include "cifs_debug.h"
+#include "cifs_fs_sb.h"
+#include "cifs_unicode.h"
+#include "fscache.h"
+#include "smb2proto.h"
+
+int
+smb2_open_file(const unsigned int xid, struct cifs_tcon *tcon, const char *path,
+	       int disposition, int desired_access, int create_options,
+	       struct cifs_fid *fid, __u32 *oplock, FILE_ALL_INFO *buf,
+	       struct cifs_sb_info *cifs_sb)
+{
+	int rc;
+	__le16 *smb2_path;
+	struct smb2_file_all_info *smb2_data = NULL;
+
+	smb2_path = cifs_convert_path_to_utf16(path, cifs_sb);
+	if (smb2_path == NULL) {
+		rc = -ENOMEM;
+		goto out;
+	}
+
+	smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + MAX_NAME * 2,
+			    GFP_KERNEL);
+	if (smb2_data == NULL) {
+		rc = -ENOMEM;
+		goto out;
+	}
+
+	desired_access |= FILE_READ_ATTRIBUTES;
+
+	rc = SMB2_open(xid, tcon, smb2_path, &fid->persistent_fid,
+		       &fid->volatile_fid, desired_access, disposition,
+		       0, 0, smb2_data);
+	if (rc)
+		goto out;
+
+	if (buf) {
+		/* open response does not have IndexNumber field - get it */
+		rc = SMB2_get_srv_num(xid, tcon, fid->persistent_fid,
+				      fid->volatile_fid,
+				      &smb2_data->IndexNumber);
+		if (rc) {
+			/* let get_inode_info disable server inode numbers */
+			smb2_data->IndexNumber = 0;
+			rc = 0;
+		}
+		move_smb2_info_to_cifs(buf, smb2_data);
+	}
+
+out:
+	*oplock = 0;
+	kfree(smb2_data);
+	kfree(smb2_path);
+	return rc;
+}