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);
  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, 0, smb2_data,
 140                                 SMB2_OP_QUERY_INFO);
 141         if (rc)
 142                 goto out;
 143
 144         move_smb2_info_to_cifs(data, smb2_data);
 145 out:
 146         kfree(smb2_data);
 147         return rc;
 148 }
 149
 150 int
 151 smb2_mkdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 152            struct cifs_sb_info *cifs_sb)
 153 {
 154         return smb2_open_op_close(xid, tcon, cifs_sb, name,
 155                                   FILE_WRITE_ATTRIBUTES, FILE_CREATE,
 156                                   CREATE_NOT_FILE, NULL, SMB2_OP_MKDIR);
 157 }
 158
 159 void
 160 smb2_mkdir_setinfo(struct inode *inode, const char *name,
 161                    struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon,
 162                    const unsigned int xid)
 163 {
 164         FILE_BASIC_INFO data;
 165         struct cifsInodeInfo *cifs_i;
 166         u32 dosattrs;
 167         int tmprc;
 168
 169         memset(&data, 0, sizeof(data));
 170         cifs_i = CIFS_I(inode);
 171         dosattrs = cifs_i->cifsAttrs | ATTR_READONLY;
 172         data.Attributes = cpu_to_le32(dosattrs);
 173         tmprc = smb2_open_op_close(xid, tcon, cifs_sb, name,
 174                                    FILE_WRITE_ATTRIBUTES, FILE_CREATE,
 175                                    CREATE_NOT_FILE, &data, SMB2_OP_SET_INFO);
 176         if (tmprc == 0)
 177                 cifs_i->cifsAttrs = dosattrs;
 178 }
 179
 180 int
 181 smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 182            struct cifs_sb_info *cifs_sb)
 183 {
 184         return smb2_open_op_close(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
 185                                   CREATE_NOT_FILE | CREATE_DELETE_ON_CLOSE,
 186                                   NULL, SMB2_OP_DELETE);
 187 }
 188
 189 int
 190 smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 191             struct cifs_sb_info *cifs_sb)
 192 {
 193         return smb2_open_op_close(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
 194                                   CREATE_DELETE_ON_CLOSE, NULL,
 195                                   SMB2_OP_DELETE);
 196 }
 197
 198 static int
 199 smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
 200                    const char *from_name, const char *to_name,
 201                    struct cifs_sb_info *cifs_sb, __u32 access, int command)
 202 {
 203         __le16 *smb2_to_name = NULL;
 204         int rc;
 205
 206         smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb);
 207         if (smb2_to_name == NULL) {
 208                 rc = -ENOMEM;
 209                 goto smb2_rename_path;
 210         }
 211
 212         rc = smb2_open_op_close(xid, tcon, cifs_sb, from_name, access,
 213                                 FILE_OPEN, 0, smb2_to_name, command);
 214 smb2_rename_path:
 215         kfree(smb2_to_name);
 216         return rc;
 217 }
 218
 219 int
 220 smb2_rename_path(const unsigned int xid, struct cifs_tcon *tcon,
 221                  const char *from_name, const char *to_name,
 222                  struct cifs_sb_info *cifs_sb)
 223 {
 224         return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
 225                                   DELETE, SMB2_OP_RENAME);
 226 }
 227
 228 int
 229 smb2_create_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
 230                      const char *from_name, const char *to_name,
 231                      struct cifs_sb_info *cifs_sb)
 232 {
 233         return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
 234                                   FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK);
 235 }
 236
 237 int
 238 smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon,
 239                    const char *full_path, __u64 size,
 240                    struct cifs_sb_info *cifs_sb, bool set_alloc)
 241 {
 242         __le64 eof = cpu_to_le64(size);
 243         return smb2_open_op_close(xid, tcon, cifs_sb, full_path,
 244                                   FILE_WRITE_DATA, FILE_OPEN, 0, &eof,
 245                                   SMB2_OP_SET_EOF);
 246 }
 247
 248 int
 249 smb2_set_file_info(struct inode *inode, const char *full_path,
 250                    FILE_BASIC_INFO *buf, const unsigned int xid)
 251 {
 252         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
 253         struct tcon_link *tlink;
 254         int rc;
 255
 256         tlink = cifs_sb_tlink(cifs_sb);
 257         if (IS_ERR(tlink))
 258                 return PTR_ERR(tlink);
 259         rc = smb2_open_op_close(xid, tlink_tcon(tlink), cifs_sb, full_path,
 260                                 FILE_WRITE_ATTRIBUTES, FILE_OPEN, 0, buf,
 261                                 SMB2_OP_SET_INFO);
 262         cifs_put_tlink(tlink);
 263         return rc;
 264 }