source4/ntvfs/posix/pvfs_qfileinfo.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    POSIX NTVFS backend - read
   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 #include "librpc/gen_ndr/xattr.h"
  25
  26
  27 /*
  28   determine what access bits are needed for a call
  29 */
  30 static uint32_t pvfs_fileinfo_access(union smb_fileinfo *info)
  31 {
  32         uint32_t needed;
  33
  34         switch (info->generic.level) {
  35         case RAW_FILEINFO_EA_LIST:
  36         case RAW_FILEINFO_ALL_EAS:
  37                 needed = SEC_FILE_READ_EA;
  38                 break;
  39
  40         case RAW_FILEINFO_IS_NAME_VALID:
  41                 needed = 0;
  42                 break;
  43
  44         case RAW_FILEINFO_SEC_DESC:
  45                 needed = 0;
  46                 if (info->query_secdesc.in.secinfo_flags & (SECINFO_OWNER|SECINFO_GROUP)) {
  47                         needed |= SEC_STD_READ_CONTROL;
  48                 }
  49                 if (info->query_secdesc.in.secinfo_flags & SECINFO_DACL) {
  50                         needed |= SEC_STD_READ_CONTROL;
  51                 }
  52                 if (info->query_secdesc.in.secinfo_flags & SECINFO_SACL) {
  53                         needed |= SEC_FLAG_SYSTEM_SECURITY;
  54                 }
  55                 break;
  56
  57         default:
  58                 needed = SEC_FILE_READ_ATTRIBUTE;
  59                 break;
  60         }
  61
  62         return needed;
  63 }
  64
  65 /*
  66   reply to a RAW_FILEINFO_EA_LIST call
  67 */
  68 NTSTATUS pvfs_query_ea_list(struct pvfs_state *pvfs, TALLOC_CTX *mem_ctx,
  69                             struct pvfs_filename *name, int fd,
  70                             uint_t num_names,
  71                             struct ea_name *names,
  72                             struct smb_ea_list *eas)
  73 {
  74         NTSTATUS status;
  75         int i;
  76         struct xattr_DosEAs *ealist = talloc(mem_ctx, struct xattr_DosEAs);
  77
  78         ZERO_STRUCTP(eas);
  79         status = pvfs_doseas_load(pvfs, name, fd, ealist);
  80         if (!NT_STATUS_IS_OK(status)) {
  81                 return status;
  82         }
  83         eas->eas = talloc_array(mem_ctx, struct ea_struct, num_names);
  84         if (eas->eas == NULL) {
  85                 return NT_STATUS_NO_MEMORY;
  86         }
  87         eas->num_eas = num_names;
  88         for (i=0;i<num_names;i++) {
  89                 int j;
  90                 eas->eas[i].flags = 0;
  91                 eas->eas[i].name.s = names[i].name.s;
  92                 eas->eas[i].value = data_blob(NULL, 0);
  93                 for (j=0;j<ealist->num_eas;j++) {
  94                         if (strcasecmp_m(eas->eas[i].name.s,
  95                                        ealist->eas[j].name) == 0) {
  96                                 eas->eas[i].value = ealist->eas[j].value;
  97                                 break;
  98                         }
  99                 }
 100         }
 101         return NT_STATUS_OK;
 102 }
 103
 104 /*
 105   reply to a RAW_FILEINFO_ALL_EAS call
 106 */
 107 static NTSTATUS pvfs_query_all_eas(struct pvfs_state *pvfs, TALLOC_CTX *mem_ctx,
 108                                    struct pvfs_filename *name, int fd,
 109                                    struct smb_ea_list *eas)
 110 {
 111         NTSTATUS status;
 112         int i;
 113         struct xattr_DosEAs *ealist = talloc(mem_ctx, struct xattr_DosEAs);
 114
 115         ZERO_STRUCTP(eas);
 116         status = pvfs_doseas_load(pvfs, name, fd, ealist);
 117         if (!NT_STATUS_IS_OK(status)) {
 118                 return status;
 119         }
 120         eas->eas = talloc_array(mem_ctx, struct ea_struct, ealist->num_eas);
 121         if (eas->eas == NULL) {
 122                 return NT_STATUS_NO_MEMORY;
 123         }
 124         eas->num_eas = 0;
 125         for (i=0;i<ealist->num_eas;i++) {
 126                 eas->eas[eas->num_eas].flags = 0;
 127                 eas->eas[eas->num_eas].name.s = ealist->eas[i].name;
 128                 eas->eas[eas->num_eas].value = ealist->eas[i].value;
 129                 eas->num_eas++;
 130         }
 131         return NT_STATUS_OK;
 132 }
 133
 134 /*
 135   approximately map a struct pvfs_filename to a generic fileinfo struct
 136 */
 137 static NTSTATUS pvfs_map_fileinfo(struct pvfs_state *pvfs,
 138                                   struct ntvfs_request *req,
 139                                   struct pvfs_filename *name, union smb_fileinfo *info,
 140                                   int fd)
 141 {
 142         switch (info->generic.level) {
 143         case RAW_FILEINFO_GENERIC:
 144                 return NT_STATUS_INVALID_LEVEL;
 145
 146         case RAW_FILEINFO_GETATTR:
 147                 info->getattr.out.attrib     = name->dos.attrib;
 148                 info->getattr.out.size       = name->st.st_size;
 149                 info->getattr.out.write_time = nt_time_to_unix(name->dos.write_time);
 150                 return NT_STATUS_OK;
 151
 152         case RAW_FILEINFO_GETATTRE:
 153         case RAW_FILEINFO_STANDARD:
 154                 info->standard.out.create_time = nt_time_to_unix(name->dos.create_time);
 155                 info->standard.out.access_time = nt_time_to_unix(name->dos.access_time);
 156                 info->standard.out.write_time  = nt_time_to_unix(name->dos.write_time);
 157                 info->standard.out.size        = name->st.st_size;
 158                 info->standard.out.alloc_size  = name->dos.alloc_size;
 159                 info->standard.out.attrib      = name->dos.attrib;
 160                 return NT_STATUS_OK;
 161
 162         case RAW_FILEINFO_EA_SIZE:
 163                 info->ea_size.out.create_time = nt_time_to_unix(name->dos.create_time);
 164                 info->ea_size.out.access_time = nt_time_to_unix(name->dos.access_time);
 165                 info->ea_size.out.write_time  = nt_time_to_unix(name->dos.write_time);
 166                 info->ea_size.out.size        = name->st.st_size;
 167                 info->ea_size.out.alloc_size  = name->dos.alloc_size;
 168                 info->ea_size.out.attrib      = name->dos.attrib;
 169                 info->ea_size.out.ea_size     = name->dos.ea_size;
 170                 return NT_STATUS_OK;
 171
 172         case RAW_FILEINFO_EA_LIST:
 173                 return pvfs_query_ea_list(pvfs, req, name, fd,
 174                                           info->ea_list.in.num_names,
 175                                           info->ea_list.in.ea_names,
 176                                           &info->ea_list.out);
 177
 178         case RAW_FILEINFO_ALL_EAS:
 179                 return pvfs_query_all_eas(pvfs, req, name, fd, &info->all_eas.out);
 180
 181         case RAW_FILEINFO_IS_NAME_VALID:
 182                 return NT_STATUS_OK;
 183
 184         case RAW_FILEINFO_BASIC_INFO:
 185         case RAW_FILEINFO_BASIC_INFORMATION:
 186                 info->basic_info.out.create_time = name->dos.create_time;
 187                 info->basic_info.out.access_time = name->dos.access_time;
 188                 info->basic_info.out.write_time  = name->dos.write_time;
 189                 info->basic_info.out.change_time = name->dos.change_time;
 190                 info->basic_info.out.attrib      = name->dos.attrib;
 191                 return NT_STATUS_OK;
 192
 193         case RAW_FILEINFO_STANDARD_INFO:
 194         case RAW_FILEINFO_STANDARD_INFORMATION:
 195                 info->standard_info.out.alloc_size     = name->dos.alloc_size;
 196                 info->standard_info.out.size           = name->st.st_size;
 197                 info->standard_info.out.nlink          = name->dos.nlink;
 198                 info->standard_info.out.delete_pending = 0; /* only for qfileinfo */
 199                 info->standard_info.out.directory   =
 200                         (name->dos.attrib & FILE_ATTRIBUTE_DIRECTORY)? 1 : 0;
 201                 return NT_STATUS_OK;
 202
 203         case RAW_FILEINFO_EA_INFO:
 204         case RAW_FILEINFO_EA_INFORMATION:
 205                 info->ea_info.out.ea_size = name->dos.ea_size;
 206                 return NT_STATUS_OK;
 207
 208         case RAW_FILEINFO_NAME_INFO:
 209         case RAW_FILEINFO_NAME_INFORMATION:
 210                 info->name_info.out.fname.s = name->original_name;
 211                 return NT_STATUS_OK;
 212
 213         case RAW_FILEINFO_ALL_INFO:
 214         case RAW_FILEINFO_ALL_INFORMATION:
 215                 info->all_info.out.create_time    = name->dos.create_time;
 216                 info->all_info.out.access_time    = name->dos.access_time;
 217                 info->all_info.out.write_time     = name->dos.write_time;
 218                 info->all_info.out.change_time    = name->dos.change_time;
 219                 info->all_info.out.attrib         = name->dos.attrib;
 220                 info->all_info.out.alloc_size     = name->dos.alloc_size;
 221                 info->all_info.out.size           = name->st.st_size;
 222                 info->all_info.out.nlink          = name->dos.nlink;
 223                 info->all_info.out.delete_pending = 0; /* only set by qfileinfo */
 224                 info->all_info.out.directory      =
 225                         (name->dos.attrib & FILE_ATTRIBUTE_DIRECTORY)? 1 : 0;
 226                 info->all_info.out.ea_size        = name->dos.ea_size;
 227                 info->all_info.out.fname.s        = name->original_name;
 228                 return NT_STATUS_OK;
 229
 230         case RAW_FILEINFO_ALT_NAME_INFO:
 231         case RAW_FILEINFO_ALT_NAME_INFORMATION:
 232                 info->name_info.out.fname.s = pvfs_short_name(pvfs, name, name);
 233                 return NT_STATUS_OK;
 234
 235         case RAW_FILEINFO_STREAM_INFO:
 236         case RAW_FILEINFO_STREAM_INFORMATION:
 237                 return pvfs_stream_information(pvfs, req, name, fd, &info->stream_info.out);
 238
 239         case RAW_FILEINFO_COMPRESSION_INFO:
 240         case RAW_FILEINFO_COMPRESSION_INFORMATION:
 241                 info->compression_info.out.compressed_size = name->st.st_size;
 242                 info->compression_info.out.format          = 0;
 243                 info->compression_info.out.unit_shift      = 0;
 244                 info->compression_info.out.chunk_shift     = 0;
 245                 info->compression_info.out.cluster_shift   = 0;
 246                 return NT_STATUS_OK;
 247
 248         case RAW_FILEINFO_INTERNAL_INFORMATION:
 249                 info->internal_information.out.file_id = name->dos.file_id;
 250                 return NT_STATUS_OK;
 251
 252         case RAW_FILEINFO_ACCESS_INFORMATION:
 253                 info->access_information.out.access_flags = 0; /* only set by qfileinfo */
 254                 return NT_STATUS_OK;
 255
 256         case RAW_FILEINFO_POSITION_INFORMATION:
 257                 info->position_information.out.position = 0; /* only set by qfileinfo */
 258                 return NT_STATUS_OK;
 259
 260         case RAW_FILEINFO_MODE_INFORMATION:
 261                 info->mode_information.out.mode = 0; /* only set by qfileinfo */
 262                 return NT_STATUS_OK;
 263
 264         case RAW_FILEINFO_ALIGNMENT_INFORMATION:
 265                 info->alignment_information.out.alignment_requirement = 0;
 266                 return NT_STATUS_OK;
 267
 268         case RAW_FILEINFO_NETWORK_OPEN_INFORMATION:
 269                 info->network_open_information.out.create_time = name->dos.create_time;
 270                 info->network_open_information.out.access_time = name->dos.access_time;
 271                 info->network_open_information.out.write_time  = name->dos.write_time;
 272                 info->network_open_information.out.change_time = name->dos.change_time;
 273                 info->network_open_information.out.alloc_size  = name->dos.alloc_size;
 274                 info->network_open_information.out.size        = name->st.st_size;
 275                 info->network_open_information.out.attrib      = name->dos.attrib;
 276                 return NT_STATUS_OK;
 277
 278         case RAW_FILEINFO_ATTRIBUTE_TAG_INFORMATION:
 279                 info->attribute_tag_information.out.attrib      = name->dos.attrib;
 280                 info->attribute_tag_information.out.reparse_tag = 0;
 281                 return NT_STATUS_OK;
 282
 283         case RAW_FILEINFO_SEC_DESC:
 284                 return pvfs_acl_query(pvfs, req, name, fd, info);
 285
 286         case RAW_FILEINFO_SMB2_ALL_INFORMATION:
 287                 info->all_info2.out.create_time    = name->dos.create_time;
 288                 info->all_info2.out.access_time    = name->dos.access_time;
 289                 info->all_info2.out.write_time     = name->dos.write_time;
 290                 info->all_info2.out.change_time    = name->dos.change_time;
 291                 info->all_info2.out.attrib         = name->dos.attrib;
 292                 info->all_info2.out.unknown1       = 0;
 293                 info->all_info2.out.alloc_size     = name->dos.alloc_size;
 294                 info->all_info2.out.size           = name->st.st_size;
 295                 info->all_info2.out.nlink          = name->dos.nlink;
 296                 info->all_info2.out.delete_pending = 0; /* only set by qfileinfo */
 297                 info->all_info2.out.directory      =
 298                         (name->dos.attrib & FILE_ATTRIBUTE_DIRECTORY)? 1 : 0;
 299                 info->all_info2.out.file_id        = name->dos.file_id;
 300                 info->all_info2.out.ea_size        = name->dos.ea_size;
 301                 if (info->all_info2.out.ea_size == 4) {
 302                         /* SMB2 uses zero for a empty EA set */
 303                         info->all_info2.out.ea_size = 0;
 304                 }
 305                 info->all_info2.out.access_mask    = 0; /* only set by qfileinfo */
 306                 info->all_info2.out.position       = 0; /* only set by qfileinfo */
 307                 info->all_info2.out.mode           = 0; /* only set by qfileinfo */
 308                 /* windows wants the full path on disk for this
 309                    result, but I really don't want to expose that on
 310                    the wire, so I'll give the path with a share
 311                    prefix, which is a good approximation */
 312                 info->all_info2.out.fname.s = talloc_asprintf(req, "\\%s\\%s",
 313                                                               pvfs->share_name,
 314                                                               name->original_name);
 315                 NT_STATUS_HAVE_NO_MEMORY(info->all_info2.out.fname.s);
 316                 return NT_STATUS_OK;
 317         }
 318
 319         return NT_STATUS_INVALID_LEVEL;
 320 }
 321
 322 /*
 323   return info on a pathname
 324 */
 325 NTSTATUS pvfs_qpathinfo(struct ntvfs_module_context *ntvfs,
 326                         struct ntvfs_request *req, union smb_fileinfo *info)
 327 {
 328         struct pvfs_state *pvfs = ntvfs->private_data;
 329         struct pvfs_filename *name;
 330         NTSTATUS status;
 331
 332         /* resolve the cifs name to a posix name */
 333         status = pvfs_resolve_name(pvfs, req, info->generic.in.file.path, PVFS_RESOLVE_STREAMS, &name);
 334         if (!NT_STATUS_IS_OK(status)) {
 335                 return status;
 336         }
 337
 338         if (!name->stream_exists) {
 339                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 340         }
 341
 342         status = pvfs_can_stat(pvfs, req, name);
 343         if (!NT_STATUS_IS_OK(status)) {
 344                 return status;
 345         }
 346
 347         status = pvfs_access_check_simple(pvfs, req, name,
 348                                           pvfs_fileinfo_access(info));
 349         if (!NT_STATUS_IS_OK(status)) {
 350                 return status;
 351         }
 352
 353         status = pvfs_map_fileinfo(pvfs, req, name, info, -1);
 354
 355         return status;
 356 }
 357
 358 /*
 359   query info on a open file
 360 */
 361 NTSTATUS pvfs_qfileinfo(struct ntvfs_module_context *ntvfs,
 362                         struct ntvfs_request *req, union smb_fileinfo *info)
 363 {
 364         struct pvfs_state *pvfs = ntvfs->private_data;
 365         struct pvfs_file *f;
 366         struct pvfs_file_handle *h;
 367         NTSTATUS status;
 368         uint32_t access_needed;
 369
 370         f = pvfs_find_fd(pvfs, req, info->generic.in.file.ntvfs);
 371         if (!f) {
 372                 return NT_STATUS_INVALID_HANDLE;
 373         }
 374         h = f->handle;
 375
 376         access_needed = pvfs_fileinfo_access(info);
 377         if ((f->access_mask & access_needed) != access_needed) {
 378                 return NT_STATUS_ACCESS_DENIED;
 379         }
 380
 381         /* update the file information */
 382         status = pvfs_resolve_name_handle(pvfs, h);
 383         if (!NT_STATUS_IS_OK(status)) {
 384                 return status;
 385         }
 386
 387         status = pvfs_map_fileinfo(pvfs, req, h->name, info, h->fd);
 388
 389         /* a qfileinfo can fill in a bit more info than a qpathinfo -
 390            now modify the levels that need to be fixed up */
 391         switch (info->generic.level) {
 392         case RAW_FILEINFO_STANDARD_INFO:
 393         case RAW_FILEINFO_STANDARD_INFORMATION:
 394                 if (pvfs_delete_on_close_set(pvfs, h)) {
 395                         info->standard_info.out.delete_pending = 1;
 396                         info->standard_info.out.nlink--;
 397                 }
 398                 break;
 399
 400         case RAW_FILEINFO_ALL_INFO:
 401         case RAW_FILEINFO_ALL_INFORMATION:
 402                 if (pvfs_delete_on_close_set(pvfs, h)) {
 403                         info->all_info.out.delete_pending = 1;
 404                         info->all_info.out.nlink--;
 405                 }
 406                 break;
 407
 408         case RAW_FILEINFO_POSITION_INFORMATION:
 409                 info->position_information.out.position = h->position;
 410                 break;
 411
 412         case RAW_FILEINFO_ACCESS_INFORMATION:
 413                 info->access_information.out.access_flags = f->access_mask;
 414                 break;
 415
 416         case RAW_FILEINFO_MODE_INFORMATION:
 417                 info->mode_information.out.mode = h->mode;
 418                 break;
 419
 420         case RAW_FILEINFO_SMB2_ALL_INFORMATION:
 421                 if (pvfs_delete_on_close_set(pvfs, h)) {
 422                         info->all_info2.out.delete_pending = 1;
 423                         info->all_info2.out.nlink--;
 424                 }
 425                 info->all_info2.out.position    = h->position;
 426                 info->all_info2.out.access_mask = f->access_mask;
 427                 info->all_info2.out.mode        = h->mode;
 428                 break;
 429
 430         default:
 431                 break;
 432         }
 433
 434         return status;
 435 }