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_STREAM_INFO:
  49         case RAW_FILEINFO_STREAM_INFORMATION:
  50                 needed = 0;
  51                 break;
  52
  53         case RAW_FILEINFO_SEC_DESC:
  54                 needed = 0;
  55                 if (info->query_secdesc.in.secinfo_flags & (SECINFO_OWNER|SECINFO_GROUP)) {
  56                         needed |= SEC_STD_READ_CONTROL;
  57                 }
  58                 if (info->query_secdesc.in.secinfo_flags & SECINFO_DACL) {
  59                         needed |= SEC_STD_READ_CONTROL;
  60                 }
  61                 if (info->query_secdesc.in.secinfo_flags & SECINFO_SACL) {
  62                         needed |= SEC_FLAG_SYSTEM_SECURITY;
  63                 }
  64                 break;
  65
  66         default:
  67                 needed = SEC_FILE_READ_ATTRIBUTE;
  68                 break;
  69         }
  70
  71         return needed;
  72 }
  73
  74 /*
  75   reply to a RAW_FILEINFO_EA_LIST call
  76 */
  77 NTSTATUS pvfs_query_ea_list(struct pvfs_state *pvfs, TALLOC_CTX *mem_ctx,
  78                             struct pvfs_filename *name, int fd,
  79                             unsigned int num_names,
  80                             struct ea_name *names,
  81                             struct smb_ea_list *eas)
  82 {
  83         NTSTATUS status;
  84         int i;
  85         struct xattr_DosEAs *ealist = talloc(mem_ctx, struct xattr_DosEAs);
  86
  87         ZERO_STRUCTP(eas);
  88         status = pvfs_doseas_load(pvfs, name, fd, ealist);
  89         if (!NT_STATUS_IS_OK(status)) {
  90                 return status;
  91         }
  92         eas->eas = talloc_array(mem_ctx, struct ea_struct, num_names);
  93         if (eas->eas == NULL) {
  94                 return NT_STATUS_NO_MEMORY;
  95         }
  96         eas->num_eas = num_names;
  97         for (i=0;i<num_names;i++) {
  98                 int j;
  99                 eas->eas[i].flags = 0;
 100                 eas->eas[i].name.s = names[i].name.s;
 101                 eas->eas[i].value = data_blob(NULL, 0);
 102                 for (j=0;j<ealist->num_eas;j++) {
 103                         if (strcasecmp_m(eas->eas[i].name.s,
 104                                        ealist->eas[j].name) == 0) {
 105                                 eas->eas[i].value = ealist->eas[j].value;
 106                                 break;
 107                         }
 108                 }
 109         }
 110         return NT_STATUS_OK;
 111 }
 112
 113 /*
 114   reply to a RAW_FILEINFO_ALL_EAS call
 115 */
 116 static NTSTATUS pvfs_query_all_eas(struct pvfs_state *pvfs, TALLOC_CTX *mem_ctx,
 117                                    struct pvfs_filename *name, int fd,
 118                                    struct smb_ea_list *eas)
 119 {
 120         NTSTATUS status;
 121         int i;
 122         struct xattr_DosEAs *ealist = talloc(mem_ctx, struct xattr_DosEAs);
 123
 124         ZERO_STRUCTP(eas);
 125         status = pvfs_doseas_load(pvfs, name, fd, ealist);
 126         if (!NT_STATUS_IS_OK(status)) {
 127                 return status;
 128         }
 129         eas->eas = talloc_array(mem_ctx, struct ea_struct, ealist->num_eas);
 130         if (eas->eas == NULL) {
 131                 return NT_STATUS_NO_MEMORY;
 132         }
 133         eas->num_eas = 0;
 134         for (i=0;i<ealist->num_eas;i++) {
 135                 eas->eas[eas->num_eas].flags = 0;
 136                 eas->eas[eas->num_eas].name.s = ealist->eas[i].name;
 137                 eas->eas[eas->num_eas].value = ealist->eas[i].value;
 138                 eas->num_eas++;
 139         }
 140         return NT_STATUS_OK;
 141 }
 142
 143 /*
 144   approximately map a struct pvfs_filename to a generic fileinfo struct
 145 */
 146 static NTSTATUS pvfs_map_fileinfo(struct pvfs_state *pvfs,
 147                                   struct ntvfs_request *req,
 148                                   struct pvfs_filename *name, union smb_fileinfo *info,
 149                                   int fd)
 150 {
 151         switch (info->generic.level) {
 152         case RAW_FILEINFO_GETATTR:
 153                 info->getattr.out.attrib     = name->dos.attrib;
 154                 info->getattr.out.size       = name->st.st_size;
 155                 info->getattr.out.write_time = nt_time_to_unix(name->dos.write_time);
 156                 return NT_STATUS_OK;
 157
 158         case RAW_FILEINFO_GETATTRE:
 159         case RAW_FILEINFO_STANDARD:
 160                 info->standard.out.create_time = nt_time_to_unix(name->dos.create_time);
 161                 info->standard.out.access_time = nt_time_to_unix(name->dos.access_time);
 162                 info->standard.out.write_time  = nt_time_to_unix(name->dos.write_time);
 163                 info->standard.out.size        = name->st.st_size;
 164                 info->standard.out.alloc_size  = name->dos.alloc_size;
 165                 info->standard.out.attrib      = name->dos.attrib;
 166                 return NT_STATUS_OK;
 167
 168         case RAW_FILEINFO_EA_SIZE:
 169                 info->ea_size.out.create_time = nt_time_to_unix(name->dos.create_time);
 170                 info->ea_size.out.access_time = nt_time_to_unix(name->dos.access_time);
 171                 info->ea_size.out.write_time  = nt_time_to_unix(name->dos.write_time);
 172                 info->ea_size.out.size        = name->st.st_size;
 173                 info->ea_size.out.alloc_size  = name->dos.alloc_size;
 174                 info->ea_size.out.attrib      = name->dos.attrib;
 175                 info->ea_size.out.ea_size     = name->dos.ea_size;
 176                 return NT_STATUS_OK;
 177
 178         case RAW_FILEINFO_EA_LIST:
 179                 return pvfs_query_ea_list(pvfs, req, name, fd,
 180                                           info->ea_list.in.num_names,
 181                                           info->ea_list.in.ea_names,
 182                                           &info->ea_list.out);
 183
 184         case RAW_FILEINFO_ALL_EAS:
 185                 return pvfs_query_all_eas(pvfs, req, name, fd, &info->all_eas.out);
 186
 187         case RAW_FILEINFO_SMB2_ALL_EAS: {
 188                 NTSTATUS status = pvfs_query_all_eas(pvfs, req, name, fd, &info->all_eas.out);
 189                 if (NT_STATUS_IS_OK(status) &&
 190                     info->all_eas.out.num_eas == 0) {
 191                         return NT_STATUS_NO_EAS_ON_FILE;
 192                 }
 193                 return status;
 194         }
 195
 196         case RAW_FILEINFO_IS_NAME_VALID:
 197                 return NT_STATUS_OK;
 198
 199         case RAW_FILEINFO_BASIC_INFO:
 200         case RAW_FILEINFO_BASIC_INFORMATION:
 201                 info->basic_info.out.create_time = name->dos.create_time;
 202                 info->basic_info.out.access_time = name->dos.access_time;
 203                 info->basic_info.out.write_time  = name->dos.write_time;
 204                 info->basic_info.out.change_time = name->dos.change_time;
 205                 info->basic_info.out.attrib      = name->dos.attrib;
 206                 return NT_STATUS_OK;
 207
 208         case RAW_FILEINFO_STANDARD_INFO:
 209         case RAW_FILEINFO_STANDARD_INFORMATION:
 210                 info->standard_info.out.alloc_size     = name->dos.alloc_size;
 211                 info->standard_info.out.size           = name->st.st_size;
 212                 info->standard_info.out.nlink          = name->dos.nlink;
 213                 info->standard_info.out.delete_pending = 0; /* only for qfileinfo */
 214                 info->standard_info.out.directory   =
 215                         (name->dos.attrib & FILE_ATTRIBUTE_DIRECTORY)? 1 : 0;
 216                 return NT_STATUS_OK;
 217
 218         case RAW_FILEINFO_EA_INFO:
 219         case RAW_FILEINFO_EA_INFORMATION:
 220                 info->ea_info.out.ea_size = name->dos.ea_size;
 221                 return NT_STATUS_OK;
 222
 223         case RAW_FILEINFO_NAME_INFO:
 224         case RAW_FILEINFO_NAME_INFORMATION:
 225                 if (req->ctx->protocol == PROTOCOL_SMB2) {
 226                         /* strange that SMB2 doesn't have this */
 227                         return NT_STATUS_NOT_SUPPORTED;
 228                 }
 229                 info->name_info.out.fname.s = name->original_name;
 230                 return NT_STATUS_OK;
 231
 232         case RAW_FILEINFO_ALL_INFO:
 233         case RAW_FILEINFO_ALL_INFORMATION:
 234                 info->all_info.out.create_time    = name->dos.create_time;
 235                 info->all_info.out.access_time    = name->dos.access_time;
 236                 info->all_info.out.write_time     = name->dos.write_time;
 237                 info->all_info.out.change_time    = name->dos.change_time;
 238                 info->all_info.out.attrib         = name->dos.attrib;
 239                 info->all_info.out.alloc_size     = name->dos.alloc_size;
 240                 info->all_info.out.size           = name->st.st_size;
 241                 info->all_info.out.nlink          = name->dos.nlink;
 242                 info->all_info.out.delete_pending = 0; /* only set by qfileinfo */
 243                 info->all_info.out.directory      =
 244                         (name->dos.attrib & FILE_ATTRIBUTE_DIRECTORY)? 1 : 0;
 245                 info->all_info.out.ea_size        = name->dos.ea_size;
 246                 info->all_info.out.fname.s        = name->original_name;
 247                 return NT_STATUS_OK;
 248
 249         case RAW_FILEINFO_ALT_NAME_INFO:
 250         case RAW_FILEINFO_ALT_NAME_INFORMATION:
 251                 info->name_info.out.fname.s = pvfs_short_name(pvfs, name, name);
 252                 return NT_STATUS_OK;
 253
 254         case RAW_FILEINFO_STREAM_INFO:
 255         case RAW_FILEINFO_STREAM_INFORMATION:
 256                 return pvfs_stream_information(pvfs, req, name, fd, &info->stream_info.out);
 257
 258         case RAW_FILEINFO_COMPRESSION_INFO:
 259         case RAW_FILEINFO_COMPRESSION_INFORMATION:
 260                 info->compression_info.out.compressed_size = name->st.st_size;
 261                 info->compression_info.out.format          = 0;
 262                 info->compression_info.out.unit_shift      = 0;
 263                 info->compression_info.out.chunk_shift     = 0;
 264                 info->compression_info.out.cluster_shift   = 0;
 265                 return NT_STATUS_OK;
 266
 267         case RAW_FILEINFO_INTERNAL_INFORMATION:
 268                 info->internal_information.out.file_id = name->dos.file_id;
 269                 return NT_STATUS_OK;
 270
 271         case RAW_FILEINFO_ACCESS_INFORMATION:
 272                 info->access_information.out.access_flags = 0; /* only set by qfileinfo */
 273                 return NT_STATUS_OK;
 274
 275         case RAW_FILEINFO_POSITION_INFORMATION:
 276                 info->position_information.out.position = 0; /* only set by qfileinfo */
 277                 return NT_STATUS_OK;
 278
 279         case RAW_FILEINFO_MODE_INFORMATION:
 280                 info->mode_information.out.mode = 0; /* only set by qfileinfo */
 281                 return NT_STATUS_OK;
 282
 283         case RAW_FILEINFO_ALIGNMENT_INFORMATION:
 284                 info->alignment_information.out.alignment_requirement = 0;
 285                 return NT_STATUS_OK;
 286
 287         case RAW_FILEINFO_NETWORK_OPEN_INFORMATION:
 288                 info->network_open_information.out.create_time = name->dos.create_time;
 289                 info->network_open_information.out.access_time = name->dos.access_time;
 290                 info->network_open_information.out.write_time  = name->dos.write_time;
 291                 info->network_open_information.out.change_time = name->dos.change_time;
 292                 info->network_open_information.out.alloc_size  = name->dos.alloc_size;
 293                 info->network_open_information.out.size        = name->st.st_size;
 294                 info->network_open_information.out.attrib      = name->dos.attrib;
 295                 return NT_STATUS_OK;
 296
 297         case RAW_FILEINFO_ATTRIBUTE_TAG_INFORMATION:
 298                 info->attribute_tag_information.out.attrib      = name->dos.attrib;
 299                 info->attribute_tag_information.out.reparse_tag = 0;
 300                 return NT_STATUS_OK;
 301
 302         case RAW_FILEINFO_SEC_DESC:
 303                 return pvfs_acl_query(pvfs, req, name, fd, info);
 304
 305         case RAW_FILEINFO_SMB2_ALL_INFORMATION:
 306                 info->all_info2.out.create_time    = name->dos.create_time;
 307                 info->all_info2.out.access_time    = name->dos.access_time;
 308                 info->all_info2.out.write_time     = name->dos.write_time;
 309                 info->all_info2.out.change_time    = name->dos.change_time;
 310                 info->all_info2.out.attrib         = name->dos.attrib;
 311                 info->all_info2.out.unknown1       = 0;
 312                 info->all_info2.out.alloc_size     = name->dos.alloc_size;
 313                 info->all_info2.out.size           = name->st.st_size;
 314                 info->all_info2.out.nlink          = name->dos.nlink;
 315                 info->all_info2.out.delete_pending = 0; /* only set by qfileinfo */
 316                 info->all_info2.out.directory      =
 317                         (name->dos.attrib & FILE_ATTRIBUTE_DIRECTORY)? 1 : 0;
 318                 info->all_info2.out.file_id        = name->dos.file_id;
 319                 info->all_info2.out.ea_size        = name->dos.ea_size;
 320                 info->all_info2.out.access_mask    = 0; /* only set by qfileinfo */
 321                 info->all_info2.out.position       = 0; /* only set by qfileinfo */
 322                 info->all_info2.out.mode           = 0; /* only set by qfileinfo */
 323                 info->all_info2.out.alignment_requirement = 0;
 324                 /* windows wants the full path on disk for this
 325                    result, but I really don't want to expose that on
 326                    the wire, so I'll give the path with a share
 327                    prefix, which is a good approximation */
 328                 info->all_info2.out.fname.s = talloc_asprintf(req, "\\%s\\%s",
 329                                                               pvfs->share_name,
 330                                                               name->original_name);
 331                 NT_STATUS_HAVE_NO_MEMORY(info->all_info2.out.fname.s);
 332                 return NT_STATUS_OK;
 333
 334         case RAW_FILEINFO_GENERIC:
 335         case RAW_FILEINFO_UNIX_BASIC:
 336         case RAW_FILEINFO_UNIX_INFO2:
 337         case RAW_FILEINFO_UNIX_LINK:
 338                 return NT_STATUS_INVALID_LEVEL;
 339         }
 340
 341         return NT_STATUS_INVALID_LEVEL;
 342 }
 343
 344 /*
 345   return info on a pathname
 346 */
 347 NTSTATUS pvfs_qpathinfo(struct ntvfs_module_context *ntvfs,
 348                         struct ntvfs_request *req, union smb_fileinfo *info)
 349 {
 350         struct pvfs_state *pvfs = talloc_get_type(ntvfs->private_data,
 351                                   struct pvfs_state);
 352         struct pvfs_filename *name;
 353         NTSTATUS status;
 354
 355         /* resolve the cifs name to a posix name */
 356         status = pvfs_resolve_name(pvfs, req, info->generic.in.file.path, PVFS_RESOLVE_STREAMS, &name);
 357         if (!NT_STATUS_IS_OK(status)) {
 358                 return status;
 359         }
 360
 361         if (!name->stream_exists) {
 362                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 363         }
 364
 365         status = pvfs_can_stat(pvfs, req, name);
 366         if (!NT_STATUS_IS_OK(status)) {
 367                 return status;
 368         }
 369
 370         status = pvfs_access_check_simple(pvfs, req, name,
 371                                           pvfs_fileinfo_access(info));
 372         if (!NT_STATUS_IS_OK(status)) {
 373                 return status;
 374         }
 375
 376         status = pvfs_map_fileinfo(pvfs, req, name, info, -1);
 377
 378         return status;
 379 }
 380
 381 /*
 382   query info on a open file
 383 */
 384 NTSTATUS pvfs_qfileinfo(struct ntvfs_module_context *ntvfs,
 385                         struct ntvfs_request *req, union smb_fileinfo *info)
 386 {
 387         struct pvfs_state *pvfs = talloc_get_type(ntvfs->private_data,
 388                                   struct pvfs_state);
 389         struct pvfs_file *f;
 390         struct pvfs_file_handle *h;
 391         NTSTATUS status;
 392         uint32_t access_needed;
 393
 394         f = pvfs_find_fd(pvfs, req, info->generic.in.file.ntvfs);
 395         if (!f) {
 396                 return NT_STATUS_INVALID_HANDLE;
 397         }
 398         h = f->handle;
 399
 400         access_needed = pvfs_fileinfo_access(info);
 401         if ((f->access_mask & access_needed) != access_needed) {
 402                 return NT_STATUS_ACCESS_DENIED;
 403         }
 404
 405         /* update the file information */
 406         status = pvfs_resolve_name_handle(pvfs, h);
 407         if (!NT_STATUS_IS_OK(status)) {
 408                 return status;
 409         }
 410
 411         status = pvfs_map_fileinfo(pvfs, req, h->name, info, h->fd);
 412
 413         /* a qfileinfo can fill in a bit more info than a qpathinfo -
 414            now modify the levels that need to be fixed up */
 415         switch (info->generic.level) {
 416         case RAW_FILEINFO_STANDARD_INFO:
 417         case RAW_FILEINFO_STANDARD_INFORMATION:
 418                 if (pvfs_delete_on_close_set(pvfs, h)) {
 419                         info->standard_info.out.delete_pending = 1;
 420                         info->standard_info.out.nlink--;
 421                 }
 422                 break;
 423
 424         case RAW_FILEINFO_ALL_INFO:
 425         case RAW_FILEINFO_ALL_INFORMATION:
 426                 if (pvfs_delete_on_close_set(pvfs, h)) {
 427                         info->all_info.out.delete_pending = 1;
 428                         info->all_info.out.nlink--;
 429                 }
 430                 break;
 431
 432         case RAW_FILEINFO_POSITION_INFORMATION:
 433                 info->position_information.out.position = h->position;
 434                 break;
 435
 436         case RAW_FILEINFO_ACCESS_INFORMATION:
 437                 info->access_information.out.access_flags = f->access_mask;
 438                 break;
 439
 440         case RAW_FILEINFO_MODE_INFORMATION:
 441                 info->mode_information.out.mode = h->mode;
 442                 break;
 443
 444         case RAW_FILEINFO_SMB2_ALL_INFORMATION:
 445                 if (pvfs_delete_on_close_set(pvfs, h)) {
 446                         info->all_info2.out.delete_pending = 1;
 447                         info->all_info2.out.nlink--;
 448                 }
 449                 info->all_info2.out.position    = h->position;
 450                 info->all_info2.out.access_mask = f->access_mask;
 451                 info->all_info2.out.mode        = h->mode;
 452                 break;
 453
 454         default:
 455                 break;
 456         }
 457
 458         return status;
 459 }