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, NULL);
  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         case SMB2_OP_RENAME:
  78                 tmprc = SMB2_rename(xid, tcon, persistent_fid, volatile_fid,
  79                                     (__le16 *)data);
  80                 break;
  81         case SMB2_OP_HARDLINK:
  82                 tmprc = SMB2_set_hardlink(xid, tcon, persistent_fid,
  83                                           volatile_fid, (__le16 *)data);
  84                 break;
  85         default:
  86                 cERROR(1, "Invalid command");
  87                 break;
  88         }
  89
  90         rc = SMB2_close(xid, tcon, persistent_fid, volatile_fid);
  91         if (tmprc)
  92                 rc = tmprc;
  93         kfree(utf16_path);
  94         return rc;
  95 }
  96
  97 void
  98 move_smb2_info_to_cifs(FILE_ALL_INFO *dst, struct smb2_file_all_info *src)
  99 {
 100         memcpy(dst, src, (size_t)(&src->CurrentByteOffset) - (size_t)src);
 101         dst->CurrentByteOffset = src->CurrentByteOffset;
 102         dst->Mode = src->Mode;
 103         dst->AlignmentRequirement = src->AlignmentRequirement;
 104         dst->IndexNumber1 = 0; /* we don't use it */
 105 }
 106
 107 int
 108 smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
 109                      struct cifs_sb_info *cifs_sb, const char *full_path,
 110                      FILE_ALL_INFO *data, bool *adjust_tz)
 111 {
 112         int rc;
 113         struct smb2_file_all_info *smb2_data;
 114
 115         *adjust_tz = false;
 116
 117         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + MAX_NAME * 2,
 118                             GFP_KERNEL);
 119         if (smb2_data == NULL)
 120                 return -ENOMEM;
 121
 122         rc = smb2_open_op_close(xid, tcon, cifs_sb, full_path,
 123                                 FILE_READ_ATTRIBUTES, FILE_OPEN, 0, 0,
 124                                 smb2_data, SMB2_OP_QUERY_INFO);
 125         if (rc)
 126                 goto out;
 127
 128         move_smb2_info_to_cifs(data, smb2_data);
 129 out:
 130         kfree(smb2_data);
 131         return rc;
 132 }
 133
 134 int
 135 smb2_mkdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 136            struct cifs_sb_info *cifs_sb)
 137 {
 138         return smb2_open_op_close(xid, tcon, cifs_sb, name,
 139                                   FILE_WRITE_ATTRIBUTES, FILE_CREATE, 0,
 140                                   CREATE_NOT_FILE, NULL, SMB2_OP_MKDIR);
 141 }
 142
 143 void
 144 smb2_mkdir_setinfo(struct inode *inode, const char *name,
 145                    struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon,
 146                    const unsigned int xid)
 147 {
 148         FILE_BASIC_INFO data;
 149         struct cifsInodeInfo *cifs_i;
 150         u32 dosattrs;
 151         int tmprc;
 152
 153         memset(&data, 0, sizeof(data));
 154         cifs_i = CIFS_I(inode);
 155         dosattrs = cifs_i->cifsAttrs | ATTR_READONLY;
 156         data.Attributes = cpu_to_le32(dosattrs);
 157         tmprc = smb2_open_op_close(xid, tcon, cifs_sb, name,
 158                                    FILE_WRITE_ATTRIBUTES, FILE_CREATE, 0,
 159                                    CREATE_NOT_FILE, &data, SMB2_OP_SET_INFO);
 160         if (tmprc == 0)
 161                 cifs_i->cifsAttrs = dosattrs;
 162 }
 163
 164 int
 165 smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 166            struct cifs_sb_info *cifs_sb)
 167 {
 168         return smb2_open_op_close(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
 169                                   0, CREATE_NOT_FILE | CREATE_DELETE_ON_CLOSE,
 170                                   NULL, SMB2_OP_DELETE);
 171 }
 172
 173 int
 174 smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 175             struct cifs_sb_info *cifs_sb)
 176 {
 177         return smb2_open_op_close(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
 178                                   0, CREATE_DELETE_ON_CLOSE, NULL,
 179                                   SMB2_OP_DELETE);
 180 }
 181
 182 static int
 183 smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
 184                    const char *from_name, const char *to_name,
 185                    struct cifs_sb_info *cifs_sb, __u32 access, int command)
 186 {
 187         __le16 *smb2_to_name = NULL;
 188         int rc;
 189
 190         smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb);
 191         if (smb2_to_name == NULL) {
 192                 rc = -ENOMEM;
 193                 goto smb2_rename_path;
 194         }
 195
 196         rc = smb2_open_op_close(xid, tcon, cifs_sb, from_name, access,
 197                                 FILE_OPEN, 0, 0, smb2_to_name, command);
 198 smb2_rename_path:
 199         kfree(smb2_to_name);
 200         return rc;
 201 }
 202
 203 int
 204 smb2_rename_path(const unsigned int xid, struct cifs_tcon *tcon,
 205                  const char *from_name, const char *to_name,
 206                  struct cifs_sb_info *cifs_sb)
 207 {
 208         return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
 209                                   DELETE, SMB2_OP_RENAME);
 210 }
 211
 212 int
 213 smb2_create_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
 214                      const char *from_name, const char *to_name,
 215                      struct cifs_sb_info *cifs_sb)
 216 {
 217         return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
 218                                   FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK);
 219 }