linux/fs/cifs/smb2inode.c
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   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
  40static int
  41smb2_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
 113void
 114move_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
 123int
 124smb2_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);
 145out:
 146        kfree(smb2_data);
 147        return rc;
 148}
 149
 150int
 151smb2_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
 159void
 160smb2_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
 180int
 181smb2_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
 189int
 190smb2_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
 198static int
 199smb2_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);
 214smb2_rename_path:
 215        kfree(smb2_to_name);
 216        return rc;
 217}
 218
 219int
 220smb2_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
 228int
 229smb2_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
 237int
 238smb2_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
 248int
 249smb2_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}
 265
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