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_ACCESS_INFORMATION:
  45                 needed = 0;
  46                 break;
  47
  48         case RAW_FILEINFO_SEC_DESC:
  49                 needed = 0;
  50                 if (info->query_secdesc.in.secinfo_flags & (SECINFO_OWNER|SECINFO_GROUP)) {
  51                         needed |= SEC_STD_READ_CONTROL;
  52                 }
  53                 if (info->query_secdesc.in.secinfo_flags & SECINFO_DACL) {
  54                         needed |= SEC_STD_READ_CONTROL;
  55                 }
  56                 if (info->query_secdesc.in.secinfo_flags & SECINFO_SACL) {
  57                         needed |= SEC_FLAG_SYSTEM_SECURITY;
  58                 }
  59                 break;
  60
  61         default:
  62                 needed = SEC_FILE_READ_ATTRIBUTE;
  63                 break;
  64         }
  65
  66         return needed;
  67 }
  68
  69 /*
  70   reply to a RAW_FILEINFO_EA_LIST call
  71 */
  72 NTSTATUS pvfs_query_ea_list(struct pvfs_state *pvfs, TALLOC_CTX *mem_ctx,
  73                             struct pvfs_filename *name, int fd,
  74                             uint_t num_names,
  75                             struct ea_name *names,
  76                             struct smb_ea_list *eas)
  77 {
  78         NTSTATUS status;
  79         int i;
  80         struct xattr_DosEAs *ealist = talloc(mem_ctx, struct xattr_DosEAs);
  81
  82         ZERO_STRUCTP(eas);
  83         status = pvfs_doseas_load(pvfs, name, fd, ealist);
  84         if (!NT_STATUS_IS_OK(status)) {
  85                 return status;
  86         }
  87         eas->eas = talloc_array(mem_ctx, struct ea_struct, num_names);
  88         if (eas->eas == NULL) {
  89                 return NT_STATUS_NO_MEMORY;
  90         }
  91         eas->num_eas = num_names;
  92         for (i=0;i<num_names;i++) {
  93                 int j;
  94                 eas->eas[i].flags = 0;
  95                 eas->eas[i].name.s = names[i].name.s;
  96                 eas->eas[i].value = data_blob(NULL, 0);
  97                 for (j=0;j<ealist->num_eas;j++) {
  98                         if (strcasecmp_m(eas->eas[i].name.s,
  99                                        ealist->eas[j].name) == 0) {
 100                                 eas->eas[i].value = ealist->eas[j].value;
 101                                 break;
 102                         }
 103                 }
 104         }
 105         return NT_STATUS_OK;
 106 }
 107
 108 /*
 109   reply to a RAW_FILEINFO_ALL_EAS call
 110 */
 111 static NTSTATUS pvfs_query_all_eas(struct pvfs_state *pvfs, TALLOC_CTX *mem_ctx,
 112                                    struct pvfs_filename *name, int fd,
 113                                    struct smb_ea_list *eas)
 114 {
 115         NTSTATUS status;
 116         int i;
 117         struct xattr_DosEAs *ealist = talloc(mem_ctx, struct xattr_DosEAs);
 118
 119         ZERO_STRUCTP(eas);
 120         status = pvfs_doseas_load(pvfs, name, fd, ealist);
 121         if (!NT_STATUS_IS_OK(status)) {
 122                 return status;
 123         }
 124         eas->eas = talloc_array(mem_ctx, struct ea_struct, ealist->num_eas);
 125         if (eas->eas == NULL) {
 126                 return NT_STATUS_NO_MEMORY;
 127         }
 128         eas->num_eas = 0;
 129         for (i=0;i<ealist->num_eas;i++) {
 130                 eas->eas[eas->num_eas].flags = 0;
 131                 eas->eas[eas->num_eas].name.s = ealist->eas[i].name;
 132                 eas->eas[eas->num_eas].value = ealist->eas[i].value;
 133                 eas->num_eas++;
 134         }
 135         return NT_STATUS_OK;
 136 }
 137
 138 /*
 139   approximately map a struct pvfs_filename to a generic fileinfo struct
 140 */
 141 static NTSTATUS pvfs_map_fileinfo(struct pvfs_state *pvfs,
 142                                   struct ntvfs_request *req,
 143                                   struct pvfs_filename *name, union smb_fileinfo *info,
 144                                   int fd)
 145 {
 146         switch (info->generic.level) {
 147         case RAW_FILEINFO_GENERIC:
 148                 return NT_STATUS_INVALID_LEVEL;
 149
 150         case RAW_FILEINFO_GETATTR:
 151                 info->getattr.out.attrib     = name->dos.attrib;
 152                 info->getattr.out.size       = name->st.st_size;
 153                 info->getattr.out.write_time = nt_time_to_unix(name->dos.write_time);
 154                 return NT_STATUS_OK;
 155
 156         case RAW_FILEINFO_GETATTRE:
 157         case RAW_FILEINFO_STANDARD:
 158                 info->standard.out.create_time = nt_time_to_unix(name->dos.create_time);
 159                 info->standard.out.access_time = nt_time_to_unix(name->dos.access_time);
 160                 info->standard.out.write_time  = nt_time_to_unix(name->dos.write_time);
 161                 info->standard.out.size        = name->st.st_size;
 162                 info->standard.out.alloc_size  = name->dos.alloc_size;
 163                 info->standard.out.attrib      = name->dos.attrib;
 164                 return NT_STATUS_OK;
 165
 166         case RAW_FILEINFO_EA_SIZE:
 167                 info->ea_size.out.create_time = nt_time_to_unix(name->dos.create_time);
 168                 info->ea_size.out.access_time = nt_time_to_unix(name->dos.access_time);
 169                 info->ea_size.out.write_time  = nt_time_to_unix(name->dos.write_time);
 170                 info->ea_size.out.size        = name->st.st_size;
 171                 info->ea_size.out.alloc_size  = name->dos.alloc_size;
 172                 info->ea_size.out.attrib      = name->dos.attrib;
 173                 info->ea_size.out.ea_size     = name->dos.ea_size;
 174                 return NT_STATUS_OK;
 175
 176         case RAW_FILEINFO_EA_LIST:
 177                 return pvfs_query_ea_list(pvfs, req, name, fd,
 178                                           info->ea_list.in.num_names,
 179                                           info->ea_list.in.ea_names,
 180                                           &info->ea_list.out);
 181
 182         case RAW_FILEINFO_ALL_EAS:
 183                 return pvfs_query_all_eas(pvfs, req, name, fd, &info->all_eas.out);
 184
 185         case RAW_FILEINFO_SMB2_ALL_EAS: {
 186                 NTSTATUS status = pvfs_query_all_eas(pvfs, req, name, fd, &info->all_eas.out);
 187                 if (NT_STATUS_IS_OK(status) &&
 188                     info->all_eas.out.num_eas == 0) {
 189                         return NT_STATUS_NO_EAS_ON_FILE;
 190                 }
 191                 return status;
 192         }
 193
 194         case RAW_FILEINFO_IS_NAME_VALID:
 195                 return NT_STATUS_OK;
 196
 197         case RAW_FILEINFO_BASIC_INFO:
 198         case RAW_FILEINFO_BASIC_INFORMATION:
 199                 info->basic_info.out.create_time = name->dos.create_time;
 200                 info->basic_info.out.access_time = name->dos.access_time;
 201                 info->basic_info.out.write_time  = name->dos.write_time;
 202                 info->basic_info.out.change_time = name->dos.change_time;
 203                 info->basic_info.out.attrib      = name->dos.attrib;
 204                 return NT_STATUS_OK;
 205
 206         case RAW_FILEINFO_STANDARD_INFO:
 207         case RAW_FILEINFO_STANDARD_INFORMATION:
 208                 info->standard_info.out.alloc_size     = name->dos.alloc_size;
 209                 info->standard_info.out.size           = name->st.st_size;
 210                 info->standard_info.out.nlink          = name->dos.nlink;
 211                 info->standard_info.out.delete_pending = 0; /* only for qfileinfo */
 212                 info->standard_info.out.directory   =
 213                         (name->dos.attrib & FILE_ATTRIBUTE_DIRECTORY)? 1 : 0;
 214                 return NT_STATUS_OK;
 215
 216         case RAW_FILEINFO_EA_INFO:
 217         case RAW_FILEINFO_EA_INFORMATION:
 218                 info->ea_info.out.ea_size = name->dos.ea_size;
 219                 return NT_STATUS_OK;
 220
 221         case RAW_FILEINFO_NAME_INFO:
 222         case RAW_FILEINFO_NAME_INFORMATION:
 223                 if (req->ctx->protocol == PROTOCOL_SMB2) {
 224                         /* strange that SMB2 doesn't have this */
 225                         return NT_STATUS_NOT_SUPPORTED;
 226                 }
 227                 info->name_info.out.fname.s = name->original_name;
 228                 return NT_STATUS_OK;
 229
 230         case RAW_FILEINFO_ALL_INFO:
 231         case RAW_FILEINFO_ALL_INFORMATION:
 232                 info->all_info.out.create_time    = name->dos.create_time;
 233                 info->all_info.out.access_time    = name->dos.access_time;
 234                 info->all_info.out.write_time     = name->dos.write_time;
 235                 info->all_info.out.change_time    = name->dos.change_time;
 236                 info->all_info.out.attrib         = name->dos.attrib;
 237                 info->all_info.out.alloc_size     = name->dos.alloc_size;
 238                 info->all_info.out.size           = name->st.st_size;
 239                 info->all_info.out.nlink          = name->dos.nlink;
 240                 info->all_info.out.delete_pending = 0; /* only set by qfileinfo */
 241                 info->all_info.out.directory      =
 242                         (name->dos.attrib & FILE_ATTRIBUTE_DIRECTORY)? 1 : 0;
 243                 info->all_info.out.ea_size        = name->dos.ea_size;
 244                 info->all_info.out.fname.s        = name->original_name;
 245                 return NT_STATUS_OK;
 246
 247         case RAW_FILEINFO_ALT_NAME_INFO:
 248         case RAW_FILEINFO_ALT_NAME_INFORMATION:
 249                 info->name_info.out.fname.s = pvfs_short_name(pvfs, name, name);
 250                 return NT_STATUS_OK;
 251
 252         case RAW_FILEINFO_STREAM_INFO:
 253         case RAW_FILEINFO_STREAM_INFORMATION:
 254                 return pvfs_stream_information(pvfs, req, name, fd, &info->stream_info.out);
 255
 256         case RAW_FILEINFO_COMPRESSION_INFO:
 257         case RAW_FILEINFO_COMPRESSION_INFORMATION:
 258                 info->compression_info.out.compressed_size = name->st.st_size;
 259                 info->compression_info.out.format          = 0;
 260                 info->compression_info.out.unit_shift      = 0;
 261                 info->compression_info.out.chunk_shift     = 0;
 262                 info->compression_info.out.cluster_shift   = 0;
 263                 return NT_STATUS_OK;
 264
 265         case RAW_FILEINFO_INTERNAL_INFORMATION:
 266                 info->internal_information.out.file_id = name->dos.file_id;
 267                 return NT_STATUS_OK;
 268
 269         case RAW_FILEINFO_ACCESS_INFORMATION:
 270                 info->access_information.out.access_flags = 0; /* only set by qfileinfo */
 271                 return NT_STATUS_OK;
 272
 273         case RAW_FILEINFO_POSITION_INFORMATION:
 274                 info->position_information.out.position = 0; /* only set by qfileinfo */
 275                 return NT_STATUS_OK;
 276
 277         case RAW_FILEINFO_MODE_INFORMATION:
 278                 info->mode_information.out.mode = 0; /* only set by qfileinfo */
 279                 return NT_STATUS_OK;
 280
 281         case RAW_FILEINFO_ALIGNMENT_INFORMATION:
 282                 info->alignment_information.out.alignment_requirement = 0;
 283                 return NT_STATUS_OK;
 284
 285         case RAW_FILEINFO_NETWORK_OPEN_INFORMATION:
 286                 info->network_open_information.out.create_time = name->dos.create_time;
 287                 info->network_open_information.out.access_time = name->dos.access_time;
 288                 info->network_open_information.out.write_time  = name->dos.write_time;
 289                 info->network_open_information.out.change_time = name->dos.change_time;
 290                 info->network_open_information.out.alloc_size  = name->dos.alloc_size;
 291                 info->network_open_information.out.size        = name->st.st_size;
 292                 info->network_open_information.out.attrib      = name->dos.attrib;
 293                 return NT_STATUS_OK;
 294
 295         case RAW_FILEINFO_ATTRIBUTE_TAG_INFORMATION:
 296                 info->attribute_tag_information.out.attrib      = name->dos.attrib;
 297                 info->attribute_tag_information.out.reparse_tag = 0;
 298                 return NT_STATUS_OK;
 299
 300         case RAW_FILEINFO_SEC_DESC:
 301                 return pvfs_acl_query(pvfs, req, name, fd, info);
 302
 303         case RAW_FILEINFO_SMB2_ALL_INFORMATION:
 304                 info->all_info2.out.create_time    = name->dos.create_time;
 305                 info->all_info2.out.access_time    = name->dos.access_time;
 306                 info->all_info2.out.write_time     = name->dos.write_time;
 307                 info->all_info2.out.change_time    = name->dos.change_time;
 308                 info->all_info2.out.attrib         = name->dos.attrib;
 309                 info->all_info2.out.unknown1       = 0;
 310                 info->all_info2.out.alloc_size     = name->dos.alloc_size;
 311                 info->all_info2.out.size           = name->st.st_size;
 312                 info->all_info2.out.nlink          = name->dos.nlink;
 313                 info->all_info2.out.delete_pending = 0; /* only set by qfileinfo */
 314                 info->all_info2.out.directory      =
 315                         (name->dos.attrib & FILE_ATTRIBUTE_DIRECTORY)? 1 : 0;
 316                 info->all_info2.out.file_id        = name->dos.file_id;
 317                 info->all_info2.out.ea_size        = name->dos.ea_size;
 318                 info->all_info2.out.access_mask    = 0; /* only set by qfileinfo */
 319                 info->all_info2.out.position       = 0; /* only set by qfileinfo */
 320                 info->all_info2.out.mode           = 0; /* only set by qfileinfo */
 321                 /* windows wants the full path on disk for this
 322                    result, but I really don't want to expose that on
 323                    the wire, so I'll give the path with a share
 324                    prefix, which is a good approximation */
 325                 info->all_info2.out.fname.s = talloc_asprintf(req, "\\%s\\%s",
 326                                                               pvfs->share_name,
 327                                                               name->original_name);
 328                 NT_STATUS_HAVE_NO_MEMORY(info->all_info2.out.fname.s);
 329                 return NT_STATUS_OK;
 330         }
 331
 332         return NT_STATUS_INVALID_LEVEL;
 333 }
 334
 335 /*
 336   return info on a pathname
 337 */
 338 NTSTATUS pvfs_qpathinfo(struct ntvfs_module_context *ntvfs,
 339                         struct ntvfs_request *req, union smb_fileinfo *info)
 340 {
 341         struct pvfs_state *pvfs = talloc_get_type(ntvfs->private_data,
 342                                   struct pvfs_state);
 343         struct pvfs_filename *name;
 344         NTSTATUS status;
 345
 346         /* resolve the cifs name to a posix name */
 347         status = pvfs_resolve_name(pvfs, req, info->generic.in.file.path, PVFS_RESOLVE_STREAMS, &name);
 348         if (!NT_STATUS_IS_OK(status)) {
 349                 return status;
 350         }
 351
 352         if (!name->stream_exists) {
 353                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 354         }
 355
 356         status = pvfs_can_stat(pvfs, req, name);
 357         if (!NT_STATUS_IS_OK(status)) {
 358                 return status;
 359         }
 360
 361         status = pvfs_access_check_simple(pvfs, req, name,
 362                                           pvfs_fileinfo_access(info));
 363         if (!NT_STATUS_IS_OK(status)) {
 364                 return status;
 365         }
 366
 367         status = pvfs_map_fileinfo(pvfs, req, name, info, -1);
 368
 369         return status;
 370 }
 371
 372 /*
 373   query info on a open file
 374 */
 375 NTSTATUS pvfs_qfileinfo(struct ntvfs_module_context *ntvfs,
 376                         struct ntvfs_request *req, union smb_fileinfo *info)
 377 {
 378         struct pvfs_state *pvfs = talloc_get_type(ntvfs->private_data,
 379                                   struct pvfs_state);
 380         struct pvfs_file *f;
 381         struct pvfs_file_handle *h;
 382         NTSTATUS status;
 383         uint32_t access_needed;
 384
 385         f = pvfs_find_fd(pvfs, req, info->generic.in.file.ntvfs);
 386         if (!f) {
 387                 return NT_STATUS_INVALID_HANDLE;
 388         }
 389         h = f->handle;
 390
 391         access_needed = pvfs_fileinfo_access(info);
 392         if ((f->access_mask & access_needed) != access_needed) {
 393                 return NT_STATUS_ACCESS_DENIED;
 394         }
 395
 396         /* update the file information */
 397         status = pvfs_resolve_name_handle(pvfs, h);
 398         if (!NT_STATUS_IS_OK(status)) {
 399                 return status;
 400         }
 401
 402         status = pvfs_map_fileinfo(pvfs, req, h->name, info, h->fd);
 403
 404         /* a qfileinfo can fill in a bit more info than a qpathinfo -
 405            now modify the levels that need to be fixed up */
 406         switch (info->generic.level) {
 407         case RAW_FILEINFO_STANDARD_INFO:
 408         case RAW_FILEINFO_STANDARD_INFORMATION:
 409                 if (pvfs_delete_on_close_set(pvfs, h)) {
 410                         info->standard_info.out.delete_pending = 1;
 411                         info->standard_info.out.nlink--;
 412                 }
 413                 break;
 414
 415         case RAW_FILEINFO_ALL_INFO:
 416         case RAW_FILEINFO_ALL_INFORMATION:
 417                 if (pvfs_delete_on_close_set(pvfs, h)) {
 418                         info->all_info.out.delete_pending = 1;
 419                         info->all_info.out.nlink--;
 420                 }
 421                 break;
 422
 423         case RAW_FILEINFO_POSITION_INFORMATION:
 424                 info->position_information.out.position = h->position;
 425                 break;
 426
 427         case RAW_FILEINFO_ACCESS_INFORMATION:
 428                 info->access_information.out.access_flags = f->access_mask;
 429                 break;
 430
 431         case RAW_FILEINFO_MODE_INFORMATION:
 432                 info->mode_information.out.mode = h->mode;
 433                 break;
 434
 435         case RAW_FILEINFO_SMB2_ALL_INFORMATION:
 436                 if (pvfs_delete_on_close_set(pvfs, h)) {
 437                         info->all_info2.out.delete_pending = 1;
 438                         info->all_info2.out.nlink--;
 439                 }
 440                 info->all_info2.out.position    = h->position;
 441                 info->all_info2.out.access_mask = f->access_mask;
 442                 info->all_info2.out.mode        = h->mode;
 443                 break;
 444
 445         default:
 446                 break;
 447         }
 448
 449         return status;
 450 }