fs/cifs/smb2file.c

   1 /*
   2  *   fs/cifs/smb2file.c
   3  *
   4  *   Copyright (C) International Business Machines  Corp., 2002, 2011
   5  *   Author(s): Steve French (sfrench@us.ibm.com),
   6  *              Pavel Shilovsky ((pshilovsky@samba.org) 2012
   7  *
   8  *   This library is free software; you can redistribute it and/or modify
   9  *   it under the terms of the GNU Lesser General Public License as published
  10  *   by the Free Software Foundation; either version 2.1 of the License, or
  11  *   (at your option) any later version.
  12  *
  13  *   This library is distributed in the hope that it will be useful,
  14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  16  *   the GNU Lesser General Public License for more details.
  17  *
  18  *   You should have received a copy of the GNU Lesser General Public License
  19  *   along with this library; if not, write to the Free Software
  20  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  21  */
  22 #include <linux/fs.h>
  23 #include <linux/stat.h>
  24 #include <linux/slab.h>
  25 #include <linux/pagemap.h>
  26 #include <asm/div64.h>
  27 #include "cifsfs.h"
  28 #include "cifspdu.h"
  29 #include "cifsglob.h"
  30 #include "cifsproto.h"
  31 #include "cifs_debug.h"
  32 #include "cifs_fs_sb.h"
  33 #include "cifs_unicode.h"
  34 #include "fscache.h"
  35 #include "smb2proto.h"
  36
  37 int
  38 smb2_open_file(const unsigned int xid, struct cifs_tcon *tcon, const char *path,
  39                int disposition, int desired_access, int create_options,
  40                struct cifs_fid *fid, __u32 *oplock, FILE_ALL_INFO *buf,
  41                struct cifs_sb_info *cifs_sb)
  42 {
  43         int rc;
  44         __le16 *smb2_path;
  45         struct smb2_file_all_info *smb2_data = NULL;
  46
  47         smb2_path = cifs_convert_path_to_utf16(path, cifs_sb);
  48         if (smb2_path == NULL) {
  49                 rc = -ENOMEM;
  50                 goto out;
  51         }
  52
  53         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + MAX_NAME * 2,
  54                             GFP_KERNEL);
  55         if (smb2_data == NULL) {
  56                 rc = -ENOMEM;
  57                 goto out;
  58         }
  59
  60         desired_access |= FILE_READ_ATTRIBUTES;
  61
  62         rc = SMB2_open(xid, tcon, smb2_path, &fid->persistent_fid,
  63                        &fid->volatile_fid, desired_access, disposition,
  64                        0, 0, smb2_data);
  65         if (rc)
  66                 goto out;
  67
  68         if (buf) {
  69                 /* open response does not have IndexNumber field - get it */
  70                 rc = SMB2_get_srv_num(xid, tcon, fid->persistent_fid,
  71                                       fid->volatile_fid,
  72                                       &smb2_data->IndexNumber);
  73                 if (rc) {
  74                         /* let get_inode_info disable server inode numbers */
  75                         smb2_data->IndexNumber = 0;
  76                         rc = 0;
  77                 }
  78                 move_smb2_info_to_cifs(buf, smb2_data);
  79         }
  80
  81 out:
  82         *oplock = 0;
  83         kfree(smb2_data);
  84         kfree(smb2_path);
  85         return rc;
  86 }