source3/smbd/smb2_posix.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    SMB2 POSIX code.
   4    Copyright (C) Jeremy Allison                 2022
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "includes.h"
  21 #include "smbd/smbd.h"
  22 #include "passdb/lookup_sid.h"
  23 #include "librpc/gen_ndr/ndr_security.h"
  24 #include "librpc/gen_ndr/smb3posix.h"
  25 #include "libcli/security/security.h"
  26
  27 void smb3_file_posix_information_init(
  28         connection_struct *conn,
  29         const struct stat_ex *st,
  30         uint32_t reparse_tag,
  31         uint32_t dos_attributes,
  32         struct smb3_file_posix_information *dst)
  33 {
  34         *dst = (struct smb3_file_posix_information) {
  35                 .end_of_file = get_file_size_stat(st),
  36                 .allocation_size = SMB_VFS_GET_ALLOC_SIZE(conn,NULL,st),
  37                 .inode = SMB_VFS_FS_FILE_ID(conn, st),
  38                 .device = st->st_ex_dev,
  39                 .creation_time = unix_timespec_to_nt_time(st->st_ex_btime),
  40                 .last_access_time = unix_timespec_to_nt_time(st->st_ex_atime),
  41                 .last_write_time = unix_timespec_to_nt_time(st->st_ex_mtime),
  42                 .change_time = unix_timespec_to_nt_time(st->st_ex_ctime),
  43                 .cc.nlinks = st->st_ex_nlink,
  44                 .cc.reparse_tag = reparse_tag,
  45                 .cc.posix_perms = unix_perms_to_wire(st->st_ex_mode & ~S_IFMT),
  46                 .cc.owner = global_sid_NULL,
  47                 .cc.group = global_sid_NULL,
  48         };
  49
  50         if (st->st_ex_uid != (uid_t)-1) {
  51                 uid_to_sid(&dst->cc.owner, st->st_ex_uid);
  52         }
  53         if (st->st_ex_gid != (uid_t)-1) {
  54                 gid_to_sid(&dst->cc.group, st->st_ex_gid);
  55         }
  56
  57         switch (st->st_ex_mode & S_IFMT) {
  58         case S_IFREG:
  59                 dst->file_attributes = dos_attributes;
  60                 break;
  61         case S_IFDIR:
  62                 dst->file_attributes = dos_attributes | FILE_ATTRIBUTE_DIRECTORY;
  63                 break;
  64         default:
  65                 /*
  66                  * All non-directory or regular files are reported
  67                  * as reparse points. Client may or may not be able
  68                  * to access these.
  69                  */
  70                 dst->file_attributes = FILE_ATTRIBUTE_REPARSE_POINT;
  71                 break;
  72         }
  73 }