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         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
  51
  52         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
  53         if (!utf16_path)
  54                 return -ENOMEM;
  55
  56         rc = SMB2_open(xid, tcon, utf16_path, &persistent_fid, &volatile_fid,
  57                        desired_access, create_disposition, file_attributes,
  58                        create_options, &oplock, NULL);
  59         if (rc) {
  60                 kfree(utf16_path);
  61                 return rc;
  62         }
  63
  64         switch (command) {
  65         case SMB2_OP_DELETE:
  66                 break;
  67         case SMB2_OP_QUERY_INFO:
  68                 tmprc = SMB2_query_info(xid, tcon, persistent_fid,
  69                                         volatile_fid,
  70                                         (struct smb2_file_all_info *)data);
  71                 break;
  72         case SMB2_OP_MKDIR:
  73                 /*
  74                  * Directories are created through parameters in the
  75                  * SMB2_open() call.
  76                  */
  77                 break;
  78         case SMB2_OP_RENAME:
  79                 tmprc = SMB2_rename(xid, tcon, persistent_fid, volatile_fid,
  80                                     (__le16 *)data);
  81                 break;
  82         case SMB2_OP_HARDLINK:
  83                 tmprc = SMB2_set_hardlink(xid, tcon, persistent_fid,
  84                                           volatile_fid, (__le16 *)data);
  85                 break;
  86         case SMB2_OP_SET_EOF:
  87                 tmprc = SMB2_set_eof(xid, tcon, persistent_fid, volatile_fid,
  88                                      current->tgid, (__le64 *)data);
  89                 break;
  90         case SMB2_OP_SET_INFO:
  91                 tmprc = SMB2_set_info(xid, tcon, persistent_fid, volatile_fid,
  92                                       (FILE_BASIC_INFO *)data);
  93                 break;
  94         default:
  95                 cifs_dbg(VFS, "Invalid command\n");
  96                 break;
  97         }
  98
  99         rc = SMB2_close(xid, tcon, persistent_fid, volatile_fid);
 100         if (tmprc)
 101                 rc = tmprc;
 102         kfree(utf16_path);
 103         return rc;
 104 }
 105
 106 void
 107 move_smb2_info_to_cifs(FILE_ALL_INFO *dst, struct smb2_file_all_info *src)
 108 {
 109         memcpy(dst, src, (size_t)(&src->CurrentByteOffset) - (size_t)src);
 110         dst->CurrentByteOffset = src->CurrentByteOffset;
 111         dst->Mode = src->Mode;
 112         dst->AlignmentRequirement = src->AlignmentRequirement;
 113         dst->IndexNumber1 = 0; /* we don't use it */
 114 }
 115
 116 int
 117 smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
 118                      struct cifs_sb_info *cifs_sb, const char *full_path,
 119                      FILE_ALL_INFO *data, bool *adjust_tz)
 120 {
 121         int rc;
 122         struct smb2_file_all_info *smb2_data;
 123
 124         *adjust_tz = false;
 125
 126         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + MAX_NAME * 2,
 127                             GFP_KERNEL);
 128         if (smb2_data == NULL)
 129                 return -ENOMEM;
 130
 131         rc = smb2_open_op_close(xid, tcon, cifs_sb, full_path,
 132                                 FILE_READ_ATTRIBUTES, FILE_OPEN, 0, 0,
 133                                 smb2_data, SMB2_OP_QUERY_INFO);
 134         if (rc)
 135                 goto out;
 136
 137         move_smb2_info_to_cifs(data, smb2_data);
 138 out:
 139         kfree(smb2_data);
 140         return rc;
 141 }
 142
 143 int
 144 smb2_mkdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 145            struct cifs_sb_info *cifs_sb)
 146 {
 147         return smb2_open_op_close(xid, tcon, cifs_sb, name,
 148                                   FILE_WRITE_ATTRIBUTES, FILE_CREATE, 0,
 149                                   CREATE_NOT_FILE, NULL, SMB2_OP_MKDIR);
 150 }
 151
 152 void
 153 smb2_mkdir_setinfo(struct inode *inode, const char *name,
 154                    struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon,
 155                    const unsigned int xid)
 156 {
 157         FILE_BASIC_INFO data;
 158         struct cifsInodeInfo *cifs_i;
 159         u32 dosattrs;
 160         int tmprc;
 161
 162         memset(&data, 0, sizeof(data));
 163         cifs_i = CIFS_I(inode);
 164         dosattrs = cifs_i->cifsAttrs | ATTR_READONLY;
 165         data.Attributes = cpu_to_le32(dosattrs);
 166         tmprc = smb2_open_op_close(xid, tcon, cifs_sb, name,
 167                                    FILE_WRITE_ATTRIBUTES, FILE_CREATE, 0,
 168                                    CREATE_NOT_FILE, &data, SMB2_OP_SET_INFO);
 169         if (tmprc == 0)
 170                 cifs_i->cifsAttrs = dosattrs;
 171 }
 172
 173 int
 174 smb2_rmdir(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_NOT_FILE | CREATE_DELETE_ON_CLOSE,
 179                                   NULL, SMB2_OP_DELETE);
 180 }
 181
 182 int
 183 smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 184             struct cifs_sb_info *cifs_sb)
 185 {
 186         return smb2_open_op_close(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
 187                                   0, CREATE_DELETE_ON_CLOSE, NULL,
 188                                   SMB2_OP_DELETE);
 189 }
 190
 191 static int
 192 smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
 193                    const char *from_name, const char *to_name,
 194                    struct cifs_sb_info *cifs_sb, __u32 access, int command)
 195 {
 196         __le16 *smb2_to_name = NULL;
 197         int rc;
 198
 199         smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb);
 200         if (smb2_to_name == NULL) {
 201                 rc = -ENOMEM;
 202                 goto smb2_rename_path;
 203         }
 204
 205         rc = smb2_open_op_close(xid, tcon, cifs_sb, from_name, access,
 206                                 FILE_OPEN, 0, 0, smb2_to_name, command);
 207 smb2_rename_path:
 208         kfree(smb2_to_name);
 209         return rc;
 210 }
 211
 212 int
 213 smb2_rename_path(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                                   DELETE, SMB2_OP_RENAME);
 219 }
 220
 221 int
 222 smb2_create_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
 223                      const char *from_name, const char *to_name,
 224                      struct cifs_sb_info *cifs_sb)
 225 {
 226         return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
 227                                   FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK);
 228 }
 229
 230 int
 231 smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon,
 232                    const char *full_path, __u64 size,
 233                    struct cifs_sb_info *cifs_sb, bool set_alloc)
 234 {
 235         __le64 eof = cpu_to_le64(size);
 236         return smb2_open_op_close(xid, tcon, cifs_sb, full_path,
 237                                   FILE_WRITE_DATA, FILE_OPEN, 0, 0, &eof,
 238                                   SMB2_OP_SET_EOF);
 239 }
 240
 241 int
 242 smb2_set_file_info(struct inode *inode, const char *full_path,
 243                    FILE_BASIC_INFO *buf, const unsigned int xid)
 244 {
 245         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
 246         struct tcon_link *tlink;
 247         int rc;
 248
 249         tlink = cifs_sb_tlink(cifs_sb);
 250         if (IS_ERR(tlink))
 251                 return PTR_ERR(tlink);
 252         rc = smb2_open_op_close(xid, tlink_tcon(tlink), cifs_sb, full_path,
 253                                 FILE_WRITE_ATTRIBUTES, FILE_OPEN, 0, 0, buf,
 254                                 SMB2_OP_SET_INFO);
 255         cifs_put_tlink(tlink);
 256         return rc;
 257 }