fs/cifs/smb2inode.c

   1 /*
   2  *   fs/cifs/smb2inode.c
   3  *
   4  *   Copyright (C) International Business Machines  Corp., 2002, 2011
   5  *                 Etersoft, 2012
   6  *   Author(s): Pavel Shilovsky (pshilovsky@samba.org),
   7  *              Steve French (sfrench@us.ibm.com)
   8  *
   9  *   This library is free software; you can redistribute it and/or modify
  10  *   it under the terms of the GNU Lesser General Public License as published
  11  *   by the Free Software Foundation; either version 2.1 of the License, or
  12  *   (at your option) any later version.
  13  *
  14  *   This library is distributed in the hope that it will be useful,
  15  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  17  *   the GNU Lesser General Public License for more details.
  18  *
  19  *   You should have received a copy of the GNU Lesser General Public License
  20  *   along with this library; if not, write to the Free Software
  21  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  22  */
  23 #include <linux/fs.h>
  24 #include <linux/stat.h>
  25 #include <linux/slab.h>
  26 #include <linux/pagemap.h>
  27 #include <asm/div64.h>
  28 #include "cifsfs.h"
  29 #include "cifspdu.h"
  30 #include "cifsglob.h"
  31 #include "cifsproto.h"
  32 #include "cifs_debug.h"
  33 #include "cifs_fs_sb.h"
  34 #include "cifs_unicode.h"
  35 #include "fscache.h"
  36 #include "smb2glob.h"
  37 #include "smb2pdu.h"
  38 #include "smb2proto.h"
  39
  40 static int
  41 smb2_open_op_close(const unsigned int xid, struct cifs_tcon *tcon,
  42                    struct cifs_sb_info *cifs_sb, const char *full_path,
  43                    __u32 desired_access, __u32 create_disposition,
  44                    __u32 file_attributes, __u32 create_options,
  45                    void *data, int command)
  46 {
  47         int rc, tmprc = 0;
  48         u64 persistent_fid, volatile_fid;
  49         __le16 *utf16_path;
  50
  51         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
  52         if (!utf16_path)
  53                 return -ENOMEM;
  54
  55         rc = SMB2_open(xid, tcon, utf16_path, &persistent_fid, &volatile_fid,
  56                        desired_access, create_disposition, file_attributes,
  57                        create_options);
  58         if (rc) {
  59                 kfree(utf16_path);
  60                 return rc;
  61         }
  62
  63         switch (command) {
  64         case SMB2_OP_DELETE:
  65                 break;
  66         case SMB2_OP_QUERY_INFO:
  67                 tmprc = SMB2_query_info(xid, tcon, persistent_fid,
  68                                         volatile_fid,
  69                                         (struct smb2_file_all_info *)data);
  70                 break;
  71         case SMB2_OP_MKDIR:
  72                 /*
  73                  * Directories are created through parameters in the
  74                  * SMB2_open() call.
  75                  */
  76                 break;
  77         default:
  78                 cERROR(1, "Invalid command");
  79                 break;
  80         }
  81
  82         rc = SMB2_close(xid, tcon, persistent_fid, volatile_fid);
  83         if (tmprc)
  84                 rc = tmprc;
  85         kfree(utf16_path);
  86         return rc;
  87 }
  88
  89 static void
  90 move_smb2_info_to_cifs(FILE_ALL_INFO *dst, struct smb2_file_all_info *src)
  91 {
  92         memcpy(dst, src, (size_t)(&src->CurrentByteOffset) - (size_t)src);
  93         dst->CurrentByteOffset = src->CurrentByteOffset;
  94         dst->Mode = src->Mode;
  95         dst->AlignmentRequirement = src->AlignmentRequirement;
  96         dst->IndexNumber1 = 0; /* we don't use it */
  97 }
  98
  99 int
 100 smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
 101                      struct cifs_sb_info *cifs_sb, const char *full_path,
 102                      FILE_ALL_INFO *data, bool *adjust_tz)
 103 {
 104         int rc;
 105         struct smb2_file_all_info *smb2_data;
 106
 107         *adjust_tz = false;
 108
 109         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + MAX_NAME * 2,
 110                             GFP_KERNEL);
 111         if (smb2_data == NULL)
 112                 return -ENOMEM;
 113
 114         rc = smb2_open_op_close(xid, tcon, cifs_sb, full_path,
 115                                 FILE_READ_ATTRIBUTES, FILE_OPEN, 0, 0,
 116                                 smb2_data, SMB2_OP_QUERY_INFO);
 117         if (rc)
 118                 goto out;
 119
 120         move_smb2_info_to_cifs(data, smb2_data);
 121 out:
 122         kfree(smb2_data);
 123         return rc;
 124 }
 125
 126 int
 127 smb2_mkdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 128            struct cifs_sb_info *cifs_sb)
 129 {
 130         return smb2_open_op_close(xid, tcon, cifs_sb, name,
 131                                   FILE_WRITE_ATTRIBUTES, FILE_CREATE, 0,
 132                                   CREATE_NOT_FILE, NULL, SMB2_OP_MKDIR);
 133 }
 134
 135 void
 136 smb2_mkdir_setinfo(struct inode *inode, const char *name,
 137                    struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon,
 138                    const unsigned int xid)
 139 {
 140         FILE_BASIC_INFO data;
 141         struct cifsInodeInfo *cifs_i;
 142         u32 dosattrs;
 143         int tmprc;
 144
 145         memset(&data, 0, sizeof(data));
 146         cifs_i = CIFS_I(inode);
 147         dosattrs = cifs_i->cifsAttrs | ATTR_READONLY;
 148         data.Attributes = cpu_to_le32(dosattrs);
 149         tmprc = smb2_open_op_close(xid, tcon, cifs_sb, name,
 150                                    FILE_WRITE_ATTRIBUTES, FILE_CREATE, 0,
 151                                    CREATE_NOT_FILE, &data, SMB2_OP_SET_INFO);
 152         if (tmprc == 0)
 153                 cifs_i->cifsAttrs = dosattrs;
 154 }
 155
 156 int
 157 smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 158            struct cifs_sb_info *cifs_sb)
 159 {
 160         return smb2_open_op_close(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
 161                                   0, CREATE_NOT_FILE | CREATE_DELETE_ON_CLOSE,
 162                                   NULL, SMB2_OP_DELETE);
 163 }