source4/ntvfs/posix/pvfs_fileinfo.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    POSIX NTVFS backend -
   5
   6    Copyright (C) Andrew Tridgell 2004
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "vfs_posix.h"
  24
  25 /****************************************************************************
  26  Change a unix mode to a dos mode.
  27 ****************************************************************************/
  28 static uint32_t dos_mode_from_stat(struct pvfs_state *pvfs, struct stat *st)
  29 {
  30         int result = 0;
  31
  32         if ((st->st_mode & S_IWUSR) == 0)
  33                 result |= FILE_ATTRIBUTE_READONLY;
  34
  35         if ((pvfs->flags & PVFS_FLAG_MAP_ARCHIVE) && ((st->st_mode & S_IXUSR) != 0))
  36                 result |= FILE_ATTRIBUTE_ARCHIVE;
  37
  38         if ((pvfs->flags & PVFS_FLAG_MAP_SYSTEM) && ((st->st_mode & S_IXGRP) != 0))
  39                 result |= FILE_ATTRIBUTE_SYSTEM;
  40
  41         if ((pvfs->flags & PVFS_FLAG_MAP_HIDDEN) && ((st->st_mode & S_IXOTH) != 0))
  42                 result |= FILE_ATTRIBUTE_HIDDEN;
  43
  44         if (S_ISDIR(st->st_mode))
  45                 result = FILE_ATTRIBUTE_DIRECTORY | (result & FILE_ATTRIBUTE_READONLY);
  46
  47         return result;
  48 }
  49
  50
  51
  52 /*
  53   fill in the dos file attributes for a file
  54 */
  55 NTSTATUS pvfs_fill_dos_info(struct pvfs_state *pvfs, struct pvfs_filename *name,
  56                             unsigned int flags, int fd)
  57 {
  58         NTSTATUS status;
  59         DATA_BLOB lkey;
  60         NTTIME write_time;
  61
  62         /* make directories appear as size 0 with 1 link */
  63         if (S_ISDIR(name->st.st_mode)) {
  64                 name->st.st_size = 0;
  65                 name->st.st_nlink = 1;
  66         } else if (name->stream_id == 0) {
  67                 name->stream_name = NULL;
  68         }
  69
  70         /* for now just use the simple samba mapping */
  71         unix_to_nt_time(&name->dos.create_time, name->st.st_ctime);
  72         unix_to_nt_time(&name->dos.access_time, name->st.st_atime);
  73         unix_to_nt_time(&name->dos.write_time,  name->st.st_mtime);
  74         unix_to_nt_time(&name->dos.change_time, name->st.st_ctime);
  75 #ifdef HAVE_STAT_TV_NSEC
  76         name->dos.create_time += name->st.st_ctim.tv_nsec / 100;
  77         name->dos.access_time += name->st.st_atim.tv_nsec / 100;
  78         name->dos.write_time  += name->st.st_mtim.tv_nsec / 100;
  79         name->dos.change_time += name->st.st_ctim.tv_nsec / 100;
  80 #endif
  81         name->dos.attrib = dos_mode_from_stat(pvfs, &name->st);
  82         name->dos.alloc_size = pvfs_round_alloc_size(pvfs, name->st.st_size);
  83         name->dos.nlink = name->st.st_nlink;
  84         name->dos.ea_size = 4;  /* TODO: Fill this in without hitting the stream bad in pvfs_doseas_load() */
  85         if (pvfs->ntvfs->ctx->protocol >= PROTOCOL_SMB2_02) {
  86                 /* SMB2 represents a null EA with zero bytes */
  87                 name->dos.ea_size = 0;
  88         }
  89
  90         name->dos.file_id = (((uint64_t)name->st.st_dev)<<32) | name->st.st_ino;
  91         name->dos.flags = 0;
  92
  93         status = pvfs_dosattrib_load(pvfs, name, fd);
  94         NT_STATUS_NOT_OK_RETURN(status);
  95
  96         if (flags & PVFS_RESOLVE_NO_OPENDB) {
  97                 return NT_STATUS_OK;
  98         }
  99
 100         status = pvfs_locking_key(name, name, &lkey);
 101         NT_STATUS_NOT_OK_RETURN(status);
 102
 103         status = odb_get_file_infos(pvfs->odb_context, &lkey,
 104                                     NULL, &write_time);
 105         data_blob_free(&lkey);
 106         if (!NT_STATUS_IS_OK(status)) {
 107                 DEBUG(1,("WARNING: odb_get_file_infos: %s\n", nt_errstr(status)));
 108                 return status;
 109         }
 110
 111         if (!null_time(write_time)) {
 112                 name->dos.write_time = write_time;
 113         }
 114
 115         return NT_STATUS_OK;
 116 }
 117
 118
 119 /*
 120   return a set of unix file permissions for a new file or directory
 121 */
 122 mode_t pvfs_fileperms(struct pvfs_state *pvfs, uint32_t attrib)
 123 {
 124         mode_t mode = (S_IRUSR | S_IRGRP | S_IROTH | S_IWUSR | S_IWGRP | S_IWOTH);
 125
 126         if (!(pvfs->flags & PVFS_FLAG_XATTR_ENABLE) &&
 127             (attrib & FILE_ATTRIBUTE_READONLY)) {
 128                 mode &= ~(S_IWUSR | S_IWGRP | S_IWOTH);
 129         }
 130
 131         if (!(pvfs->flags & PVFS_FLAG_XATTR_ENABLE)) {
 132                 if ((attrib & FILE_ATTRIBUTE_ARCHIVE) &&
 133                     (pvfs->flags & PVFS_FLAG_MAP_ARCHIVE)) {
 134                         mode |= S_IXUSR;
 135                 }
 136                 if ((attrib & FILE_ATTRIBUTE_SYSTEM) &&
 137                     (pvfs->flags & PVFS_FLAG_MAP_SYSTEM)) {
 138                         mode |= S_IXGRP;
 139                 }
 140                 if ((attrib & FILE_ATTRIBUTE_HIDDEN) &&
 141                     (pvfs->flags & PVFS_FLAG_MAP_HIDDEN)) {
 142                         mode |= S_IXOTH;
 143                 }
 144         }
 145
 146         if (attrib & FILE_ATTRIBUTE_DIRECTORY) {
 147                 mode |= (S_IFDIR | S_IWUSR);
 148                 mode |= (S_IXUSR | S_IXGRP | S_IXOTH);
 149                 mode &= pvfs->options.dir_mask;
 150                 mode |= pvfs->options.force_dir_mode;
 151         } else {
 152                 mode &= pvfs->options.create_mask;
 153                 mode |= pvfs->options.force_create_mode;
 154         }
 155
 156         return mode;
 157 }
 158
 159