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         __le16 *utf16_path;
  48         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
  49         struct cifs_open_parms oparms;
  50         struct cifs_fid fid;
  51
  52         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
  53         if (!utf16_path)
  54                 return -ENOMEM;
  55
  56         oparms.tcon = tcon;
  57         oparms.desired_access = desired_access;
  58         oparms.disposition = create_disposition;
  59         oparms.create_options = create_options;
  60         oparms.fid = &fid;
  61         oparms.reconnect = false;
  62
  63         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
  64         if (rc) {
  65                 kfree(utf16_path);
  66                 return rc;
  67         }
  68
  69         switch (command) {
  70         case SMB2_OP_DELETE:
  71                 break;
  72         case SMB2_OP_QUERY_INFO:
  73                 tmprc = SMB2_query_info(xid, tcon, fid.persistent_fid,
  74                                         fid.volatile_fid,
  75                                         (struct smb2_file_all_info *)data);
  76                 break;
  77         case SMB2_OP_MKDIR:
  78                 /*
  79                  * Directories are created through parameters in the
  80                  * SMB2_open() call.
  81                  */
  82                 break;
  83         case SMB2_OP_RENAME:
  84                 tmprc = SMB2_rename(xid, tcon, fid.persistent_fid,
  85                                     fid.volatile_fid, (__le16 *)data);
  86                 break;
  87         case SMB2_OP_HARDLINK:
  88                 tmprc = SMB2_set_hardlink(xid, tcon, fid.persistent_fid,
  89                                           fid.volatile_fid, (__le16 *)data);
  90                 break;
  91         case SMB2_OP_SET_EOF:
  92                 tmprc = SMB2_set_eof(xid, tcon, fid.persistent_fid,
  93                                      fid.volatile_fid, current->tgid,
  94                                      (__le64 *)data);
  95                 break;
  96         case SMB2_OP_SET_INFO:
  97                 tmprc = SMB2_set_info(xid, tcon, fid.persistent_fid,
  98                                       fid.volatile_fid,
  99                                       (FILE_BASIC_INFO *)data);
 100                 break;
 101         default:
 102                 cifs_dbg(VFS, "Invalid command\n");
 103                 break;
 104         }
 105
 106         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 107         if (tmprc)
 108                 rc = tmprc;
 109         kfree(utf16_path);
 110         return rc;
 111 }
 112
 113 void
 114 move_smb2_info_to_cifs(FILE_ALL_INFO *dst, struct smb2_file_all_info *src)
 115 {
 116         memcpy(dst, src, (size_t)(&src->CurrentByteOffset) - (size_t)src);
 117         dst->CurrentByteOffset = src->CurrentByteOffset;
 118         dst->Mode = src->Mode;
 119         dst->AlignmentRequirement = src->AlignmentRequirement;
 120         dst->IndexNumber1 = 0; /* we don't use it */
 121 }
 122
 123 int
 124 smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
 125                      struct cifs_sb_info *cifs_sb, const char *full_path,
 126                      FILE_ALL_INFO *data, bool *adjust_tz)
 127 {
 128         int rc;
 129         struct smb2_file_all_info *smb2_data;
 130
 131         *adjust_tz = false;
 132
 133         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + MAX_NAME * 2,
 134                             GFP_KERNEL);
 135         if (smb2_data == NULL)
 136                 return -ENOMEM;
 137
 138         rc = smb2_open_op_close(xid, tcon, cifs_sb, full_path,
 139                                 FILE_READ_ATTRIBUTES, FILE_OPEN,
 140                                 OPEN_REPARSE_POINT, smb2_data,
 141                                 SMB2_OP_QUERY_INFO);
 142         if (rc)
 143                 goto out;
 144
 145         move_smb2_info_to_cifs(data, smb2_data);
 146 out:
 147         kfree(smb2_data);
 148         return rc;
 149 }
 150
 151 int
 152 smb2_mkdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 153            struct cifs_sb_info *cifs_sb)
 154 {
 155         return smb2_open_op_close(xid, tcon, cifs_sb, name,
 156                                   FILE_WRITE_ATTRIBUTES, FILE_CREATE,
 157                                   CREATE_NOT_FILE, NULL, SMB2_OP_MKDIR);
 158 }
 159
 160 void
 161 smb2_mkdir_setinfo(struct inode *inode, const char *name,
 162                    struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon,
 163                    const unsigned int xid)
 164 {
 165         FILE_BASIC_INFO data;
 166         struct cifsInodeInfo *cifs_i;
 167         u32 dosattrs;
 168         int tmprc;
 169
 170         memset(&data, 0, sizeof(data));
 171         cifs_i = CIFS_I(inode);
 172         dosattrs = cifs_i->cifsAttrs | ATTR_READONLY;
 173         data.Attributes = cpu_to_le32(dosattrs);
 174         tmprc = smb2_open_op_close(xid, tcon, cifs_sb, name,
 175                                    FILE_WRITE_ATTRIBUTES, FILE_CREATE,
 176                                    CREATE_NOT_FILE, &data, SMB2_OP_SET_INFO);
 177         if (tmprc == 0)
 178                 cifs_i->cifsAttrs = dosattrs;
 179 }
 180
 181 int
 182 smb2_rmdir(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_NOT_FILE | CREATE_DELETE_ON_CLOSE,
 187                                   NULL, SMB2_OP_DELETE);
 188 }
 189
 190 int
 191 smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 192             struct cifs_sb_info *cifs_sb)
 193 {
 194         return smb2_open_op_close(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
 195                                   CREATE_DELETE_ON_CLOSE | OPEN_REPARSE_POINT,
 196                                   NULL, SMB2_OP_DELETE);
 197 }
 198
 199 static int
 200 smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
 201                    const char *from_name, const char *to_name,
 202                    struct cifs_sb_info *cifs_sb, __u32 access, int command)
 203 {
 204         __le16 *smb2_to_name = NULL;
 205         int rc;
 206
 207         smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb);
 208         if (smb2_to_name == NULL) {
 209                 rc = -ENOMEM;
 210                 goto smb2_rename_path;
 211         }
 212
 213         rc = smb2_open_op_close(xid, tcon, cifs_sb, from_name, access,
 214                                 FILE_OPEN, 0, smb2_to_name, command);
 215 smb2_rename_path:
 216         kfree(smb2_to_name);
 217         return rc;
 218 }
 219
 220 int
 221 smb2_rename_path(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                                   DELETE, SMB2_OP_RENAME);
 227 }
 228
 229 int
 230 smb2_create_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
 231                      const char *from_name, const char *to_name,
 232                      struct cifs_sb_info *cifs_sb)
 233 {
 234         return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
 235                                   FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK);
 236 }
 237
 238 int
 239 smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon,
 240                    const char *full_path, __u64 size,
 241                    struct cifs_sb_info *cifs_sb, bool set_alloc)
 242 {
 243         __le64 eof = cpu_to_le64(size);
 244         return smb2_open_op_close(xid, tcon, cifs_sb, full_path,
 245                                   FILE_WRITE_DATA, FILE_OPEN, 0, &eof,
 246                                   SMB2_OP_SET_EOF);
 247 }
 248
 249 int
 250 smb2_set_file_info(struct inode *inode, const char *full_path,
 251                    FILE_BASIC_INFO *buf, const unsigned int xid)
 252 {
 253         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
 254         struct tcon_link *tlink;
 255         int rc;
 256
 257         tlink = cifs_sb_tlink(cifs_sb);
 258         if (IS_ERR(tlink))
 259                 return PTR_ERR(tlink);
 260         rc = smb2_open_op_close(xid, tlink_tcon(tlink), cifs_sb, full_path,
 261                                 FILE_WRITE_ATTRIBUTES, FILE_OPEN, 0, buf,
 262                                 SMB2_OP_SET_INFO);
 263         cifs_put_tlink(tlink);
 264         return rc;
 265 }