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 create_options, void *data, int command)
  45 {
  46         int rc, tmprc = 0;
  47         u64 persistent_fid, volatile_fid;
  48         __le16 *utf16_path;
  49         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
  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, create_options,
  57                        &oplock, 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         case SMB2_OP_SET_EOF:
  86                 tmprc = SMB2_set_eof(xid, tcon, persistent_fid, volatile_fid,
  87                                      current->tgid, (__le64 *)data);
  88                 break;
  89         case SMB2_OP_SET_INFO:
  90                 tmprc = SMB2_set_info(xid, tcon, persistent_fid, volatile_fid,
  91                                       (FILE_BASIC_INFO *)data);
  92                 break;
  93         default:
  94                 cifs_dbg(VFS, "Invalid command\n");
  95                 break;
  96         }
  97
  98         rc = SMB2_close(xid, tcon, persistent_fid, volatile_fid);
  99         if (tmprc)
 100                 rc = tmprc;
 101         kfree(utf16_path);
 102         return rc;
 103 }
 104
 105 void
 106 move_smb2_info_to_cifs(FILE_ALL_INFO *dst, struct smb2_file_all_info *src)
 107 {
 108         memcpy(dst, src, (size_t)(&src->CurrentByteOffset) - (size_t)src);
 109         dst->CurrentByteOffset = src->CurrentByteOffset;
 110         dst->Mode = src->Mode;
 111         dst->AlignmentRequirement = src->AlignmentRequirement;
 112         dst->IndexNumber1 = 0; /* we don't use it */
 113 }
 114
 115 int
 116 smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
 117                      struct cifs_sb_info *cifs_sb, const char *full_path,
 118                      FILE_ALL_INFO *data, bool *adjust_tz)
 119 {
 120         int rc;
 121         struct smb2_file_all_info *smb2_data;
 122
 123         *adjust_tz = false;
 124
 125         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + MAX_NAME * 2,
 126                             GFP_KERNEL);
 127         if (smb2_data == NULL)
 128                 return -ENOMEM;
 129
 130         rc = smb2_open_op_close(xid, tcon, cifs_sb, full_path,
 131                                 FILE_READ_ATTRIBUTES, FILE_OPEN, 0, smb2_data,
 132                                 SMB2_OP_QUERY_INFO);
 133         if (rc)
 134                 goto out;
 135
 136         move_smb2_info_to_cifs(data, smb2_data);
 137 out:
 138         kfree(smb2_data);
 139         return rc;
 140 }
 141
 142 int
 143 smb2_mkdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 144            struct cifs_sb_info *cifs_sb)
 145 {
 146         return smb2_open_op_close(xid, tcon, cifs_sb, name,
 147                                   FILE_WRITE_ATTRIBUTES, FILE_CREATE,
 148                                   CREATE_NOT_FILE, NULL, SMB2_OP_MKDIR);
 149 }
 150
 151 void
 152 smb2_mkdir_setinfo(struct inode *inode, const char *name,
 153                    struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon,
 154                    const unsigned int xid)
 155 {
 156         FILE_BASIC_INFO data;
 157         struct cifsInodeInfo *cifs_i;
 158         u32 dosattrs;
 159         int tmprc;
 160
 161         memset(&data, 0, sizeof(data));
 162         cifs_i = CIFS_I(inode);
 163         dosattrs = cifs_i->cifsAttrs | ATTR_READONLY;
 164         data.Attributes = cpu_to_le32(dosattrs);
 165         tmprc = smb2_open_op_close(xid, tcon, cifs_sb, name,
 166                                    FILE_WRITE_ATTRIBUTES, FILE_CREATE,
 167                                    CREATE_NOT_FILE, &data, SMB2_OP_SET_INFO);
 168         if (tmprc == 0)
 169                 cifs_i->cifsAttrs = dosattrs;
 170 }
 171
 172 int
 173 smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 174            struct cifs_sb_info *cifs_sb)
 175 {
 176         return smb2_open_op_close(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
 177                                   CREATE_NOT_FILE | CREATE_DELETE_ON_CLOSE,
 178                                   NULL, SMB2_OP_DELETE);
 179 }
 180
 181 int
 182 smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 183             struct cifs_sb_info *cifs_sb)
 184 {
 185         return smb2_open_op_close(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
 186                                   CREATE_DELETE_ON_CLOSE, NULL,
 187                                   SMB2_OP_DELETE);
 188 }
 189
 190 static int
 191 smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
 192                    const char *from_name, const char *to_name,
 193                    struct cifs_sb_info *cifs_sb, __u32 access, int command)
 194 {
 195         __le16 *smb2_to_name = NULL;
 196         int rc;
 197
 198         smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb);
 199         if (smb2_to_name == NULL) {
 200                 rc = -ENOMEM;
 201                 goto smb2_rename_path;
 202         }
 203
 204         rc = smb2_open_op_close(xid, tcon, cifs_sb, from_name, access,
 205                                 FILE_OPEN, 0, smb2_to_name, command);
 206 smb2_rename_path:
 207         kfree(smb2_to_name);
 208         return rc;
 209 }
 210
 211 int
 212 smb2_rename_path(const unsigned int xid, struct cifs_tcon *tcon,
 213                  const char *from_name, const char *to_name,
 214                  struct cifs_sb_info *cifs_sb)
 215 {
 216         return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
 217                                   DELETE, SMB2_OP_RENAME);
 218 }
 219
 220 int
 221 smb2_create_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
 222                      const char *from_name, const char *to_name,
 223                      struct cifs_sb_info *cifs_sb)
 224 {
 225         return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
 226                                   FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK);
 227 }
 228
 229 int
 230 smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon,
 231                    const char *full_path, __u64 size,
 232                    struct cifs_sb_info *cifs_sb, bool set_alloc)
 233 {
 234         __le64 eof = cpu_to_le64(size);
 235         return smb2_open_op_close(xid, tcon, cifs_sb, full_path,
 236                                   FILE_WRITE_DATA, FILE_OPEN, 0, &eof,
 237                                   SMB2_OP_SET_EOF);
 238 }
 239
 240 int
 241 smb2_set_file_info(struct inode *inode, const char *full_path,
 242                    FILE_BASIC_INFO *buf, const unsigned int xid)
 243 {
 244         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
 245         struct tcon_link *tlink;
 246         int rc;
 247
 248         tlink = cifs_sb_tlink(cifs_sb);
 249         if (IS_ERR(tlink))
 250                 return PTR_ERR(tlink);
 251         rc = smb2_open_op_close(xid, tlink_tcon(tlink), cifs_sb, full_path,
 252                                 FILE_WRITE_ATTRIBUTES, FILE_OPEN, 0, buf,
 253                                 SMB2_OP_SET_INFO);
 254         cifs_put_tlink(tlink);
 255         return rc;
 256 }