source4/ntvfs/posix/pvfs_setfileinfo.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    POSIX NTVFS backend - setfileinfo
   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 2 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, write to the Free Software
  20    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21 */
  22
  23 #include "includes.h"
  24 #include "vfs_posix.h"
  25 #include "system/time.h"
  26 #include "librpc/gen_ndr/ndr_xattr.h"
  27
  28
  29 /*
  30   determine what access bits are needed for a call
  31 */
  32 static uint32_t pvfs_setfileinfo_access(union smb_setfileinfo *info)
  33 {
  34         uint32_t needed;
  35
  36         switch (info->generic.level) {
  37         case RAW_SFILEINFO_EA_SET:
  38                 needed = SEC_FILE_WRITE_EA;
  39                 break;
  40
  41         case RAW_SFILEINFO_DISPOSITION_INFO:
  42         case RAW_SFILEINFO_DISPOSITION_INFORMATION:
  43                 needed = SEC_STD_DELETE;
  44                 break;
  45
  46         case RAW_SFILEINFO_END_OF_FILE_INFO:
  47                 needed = SEC_FILE_WRITE_DATA;
  48                 break;
  49
  50         case RAW_SFILEINFO_POSITION_INFORMATION:
  51                 needed = 0;
  52                 break;
  53
  54         case RAW_SFILEINFO_SEC_DESC:
  55                 needed = 0;
  56                 if (info->set_secdesc.in.secinfo_flags & (SECINFO_DACL|SECINFO_SACL)) {
  57                         needed |= SEC_STD_WRITE_DAC;
  58                 }
  59                 break;
  60
  61         default:
  62                 needed = SEC_FILE_WRITE_ATTRIBUTE;
  63                 break;
  64         }
  65         return needed;
  66 }
  67
  68 /*
  69   rename_information level
  70 */
  71 static NTSTATUS pvfs_setfileinfo_rename(struct pvfs_state *pvfs,
  72                                         struct ntvfs_request *req,
  73                                         struct pvfs_filename *name,
  74                                         struct smb_rename_information *r)
  75 {
  76         NTSTATUS status;
  77         struct pvfs_filename *name2;
  78         char *new_name, *p;
  79
  80         /* renames are only allowed within a directory */
  81         if (strchr_m(r->new_name, '\\')) {
  82                 return NT_STATUS_NOT_SUPPORTED;
  83         }
  84
  85         if (name->dos.attrib & FILE_ATTRIBUTE_DIRECTORY) {
  86                 /* don't allow this for now */
  87                 return NT_STATUS_FILE_IS_A_DIRECTORY;
  88         }
  89
  90         /* don't allow stream renames for now */
  91         if (name->stream_name) {
  92                 return NT_STATUS_INVALID_PARAMETER;
  93         }
  94
  95         /* w2k3 does not appear to allow relative rename */
  96         if (r->root_fid != 0) {
  97                 return NT_STATUS_INVALID_PARAMETER;
  98         }
  99
 100         /* construct the fully qualified windows name for the new file name */
 101         new_name = talloc_strdup(req, name->original_name);
 102         if (new_name == NULL) {
 103                 return NT_STATUS_NO_MEMORY;
 104         }
 105         p = strrchr_m(new_name, '\\');
 106         if (p == NULL) {
 107                 return NT_STATUS_OBJECT_NAME_INVALID;
 108         }
 109         *p = 0;
 110
 111         new_name = talloc_asprintf(req, "%s\\%s", new_name, r->new_name);
 112         if (new_name == NULL) {
 113                 return NT_STATUS_NO_MEMORY;
 114         }
 115
 116         /* resolve the new name */
 117         status = pvfs_resolve_name(pvfs, name, new_name, 0, &name2);
 118         if (!NT_STATUS_IS_OK(status)) {
 119                 return status;
 120         }
 121
 122         /* if the destination exists, then check the rename is allowed */
 123         if (name2->exists) {
 124                 struct odb_lock *lck;
 125
 126                 if (strcmp(name2->full_name, name->full_name) == 0) {
 127                         /* rename to same name is null-op */
 128                         return NT_STATUS_OK;
 129                 }
 130
 131                 if (!r->overwrite) {
 132                         return NT_STATUS_OBJECT_NAME_COLLISION;
 133                 }
 134
 135                 status = pvfs_can_delete(pvfs, req, name2, &lck);
 136                 if (NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION)) {
 137                         return NT_STATUS_ACCESS_DENIED;
 138                 }
 139                 if (!NT_STATUS_IS_OK(status)) {
 140                         return status;
 141                 }
 142         }
 143
 144         status = pvfs_access_check_parent(pvfs, req, name2, SEC_DIR_ADD_FILE);
 145         if (!NT_STATUS_IS_OK(status)) {
 146                 return status;
 147         }
 148
 149         if (rename(name->full_name, name2->full_name) == -1) {
 150                 return pvfs_map_errno(pvfs, errno);
 151         }
 152
 153         name->full_name = talloc_steal(name, name2->full_name);
 154         name->original_name = talloc_steal(name, name2->original_name);
 155
 156         return NT_STATUS_OK;
 157 }
 158
 159 /*
 160   add a single DOS EA
 161 */
 162 NTSTATUS pvfs_setfileinfo_ea_set(struct pvfs_state *pvfs,
 163                                  struct pvfs_filename *name,
 164                                  int fd, uint16_t num_eas,
 165                                  struct ea_struct *eas)
 166 {
 167         struct xattr_DosEAs *ealist;
 168         int i, j;
 169         NTSTATUS status;
 170
 171         if (num_eas == 0) {
 172                 return NT_STATUS_OK;
 173         }
 174
 175         if (!(pvfs->flags & PVFS_FLAG_XATTR_ENABLE)) {
 176                 return NT_STATUS_NOT_SUPPORTED;
 177         }
 178
 179         ealist = talloc(name, struct xattr_DosEAs);
 180
 181         /* load the current list */
 182         status = pvfs_doseas_load(pvfs, name, fd, ealist);
 183         if (!NT_STATUS_IS_OK(status)) {
 184                 return status;
 185         }
 186
 187         for (j=0;j<num_eas;j++) {
 188                 struct ea_struct *ea = &eas[j];
 189                 /* see if its already there */
 190                 for (i=0;i<ealist->num_eas;i++) {
 191                         if (strcasecmp_m(ealist->eas[i].name, ea->name.s) == 0) {
 192                                 ealist->eas[i].value = ea->value;
 193                                 break;
 194                         }
 195                 }
 196
 197                 if (i==ealist->num_eas) {
 198                         /* add it */
 199                         ealist->eas = talloc_realloc(ealist, ealist->eas,
 200                                                        struct xattr_EA,
 201                                                        ealist->num_eas+1);
 202                         if (ealist->eas == NULL) {
 203                                 return NT_STATUS_NO_MEMORY;
 204                         }
 205                         ealist->eas[i].name = ea->name.s;
 206                         ealist->eas[i].value = ea->value;
 207                         ealist->num_eas++;
 208                 }
 209         }
 210
 211         /* pull out any null EAs */
 212         for (i=0;i<ealist->num_eas;i++) {
 213                 if (ealist->eas[i].value.length == 0) {
 214                         memmove(&ealist->eas[i],
 215                                 &ealist->eas[i+1],
 216                                 (ealist->num_eas-(i+1)) * sizeof(ealist->eas[i]));
 217                         ealist->num_eas--;
 218                         i--;
 219                 }
 220         }
 221
 222         status = pvfs_doseas_save(pvfs, name, fd, ealist);
 223         if (!NT_STATUS_IS_OK(status)) {
 224                 return status;
 225         }
 226
 227         name->dos.ea_size = 4;
 228         for (i=0;i<ealist->num_eas;i++) {
 229                 name->dos.ea_size += 4 + strlen(ealist->eas[i].name)+1 +
 230                         ealist->eas[i].value.length;
 231         }
 232
 233         /* update the ea_size attrib */
 234         return pvfs_dosattrib_save(pvfs, name, fd);
 235 }
 236
 237 /*
 238   set info on a open file
 239 */
 240 NTSTATUS pvfs_setfileinfo(struct ntvfs_module_context *ntvfs,
 241                           struct ntvfs_request *req,
 242                           union smb_setfileinfo *info)
 243 {
 244         struct pvfs_state *pvfs = ntvfs->private_data;
 245         struct utimbuf unix_times;
 246         struct pvfs_file *f;
 247         struct pvfs_file_handle *h;
 248         struct pvfs_filename newstats;
 249         NTSTATUS status;
 250         uint32_t access_needed;
 251
 252         f = pvfs_find_fd(pvfs, req, info->generic.file.fnum);
 253         if (!f) {
 254                 return NT_STATUS_INVALID_HANDLE;
 255         }
 256
 257         h = f->handle;
 258
 259         access_needed = pvfs_setfileinfo_access(info);
 260         if ((f->access_mask & access_needed) != access_needed) {
 261                 return NT_STATUS_ACCESS_DENIED;
 262         }
 263
 264         /* update the file information */
 265         status = pvfs_resolve_name_fd(pvfs, h->fd, h->name);
 266         if (!NT_STATUS_IS_OK(status)) {
 267                 return status;
 268         }
 269
 270         /* we take a copy of the current file stats, then update
 271            newstats in each of the elements below. At the end we
 272            compare, and make any changes needed */
 273         newstats = *h->name;
 274
 275         switch (info->generic.level) {
 276         case RAW_SFILEINFO_SETATTR:
 277                 if (!null_time(info->setattr.in.write_time)) {
 278                         unix_to_nt_time(&newstats.dos.write_time, info->setattr.in.write_time);
 279                 }
 280                 if (info->setattr.in.attrib != FILE_ATTRIBUTE_NORMAL) {
 281                         newstats.dos.attrib = info->setattr.in.attrib;
 282                 }
 283                 break;
 284
 285         case RAW_SFILEINFO_SETATTRE:
 286         case RAW_SFILEINFO_STANDARD:
 287                 if (!null_time(info->setattre.in.create_time)) {
 288                         unix_to_nt_time(&newstats.dos.create_time, info->setattre.in.create_time);
 289                 }
 290                 if (!null_time(info->setattre.in.access_time)) {
 291                         unix_to_nt_time(&newstats.dos.access_time, info->setattre.in.access_time);
 292                 }
 293                 if (!null_time(info->setattre.in.write_time)) {
 294                         unix_to_nt_time(&newstats.dos.write_time, info->setattre.in.write_time);
 295                 }
 296                 break;
 297
 298         case RAW_SFILEINFO_EA_SET:
 299                 return pvfs_setfileinfo_ea_set(pvfs, h->name, h->fd,
 300                                                info->ea_set.in.num_eas,
 301                                                info->ea_set.in.eas);
 302
 303         case RAW_SFILEINFO_BASIC_INFO:
 304         case RAW_SFILEINFO_BASIC_INFORMATION:
 305                 if (!null_nttime(info->basic_info.in.create_time)) {
 306                         newstats.dos.create_time = info->basic_info.in.create_time;
 307                 }
 308                 if (!null_nttime(info->basic_info.in.access_time)) {
 309                         newstats.dos.access_time = info->basic_info.in.access_time;
 310                 }
 311                 if (!null_nttime(info->basic_info.in.write_time)) {
 312                         newstats.dos.write_time = info->basic_info.in.write_time;
 313                         newstats.dos.flags |= XATTR_ATTRIB_FLAG_STICKY_WRITE_TIME;
 314                         h->sticky_write_time = True;
 315                 }
 316                 if (!null_nttime(info->basic_info.in.change_time)) {
 317                         newstats.dos.change_time = info->basic_info.in.change_time;
 318                 }
 319                 if (info->basic_info.in.attrib != 0) {
 320                         newstats.dos.attrib = info->basic_info.in.attrib;
 321                 }
 322                 break;
 323
 324         case RAW_SFILEINFO_DISPOSITION_INFO:
 325         case RAW_SFILEINFO_DISPOSITION_INFORMATION:
 326                 return pvfs_set_delete_on_close(pvfs, req, f,
 327                                                 info->disposition_info.in.delete_on_close);
 328
 329         case RAW_SFILEINFO_ALLOCATION_INFO:
 330         case RAW_SFILEINFO_ALLOCATION_INFORMATION:
 331                 newstats.dos.alloc_size = info->allocation_info.in.alloc_size;
 332                 if (newstats.dos.alloc_size < newstats.st.st_size) {
 333                         newstats.st.st_size = newstats.dos.alloc_size;
 334                 }
 335                 newstats.dos.alloc_size = pvfs_round_alloc_size(pvfs,
 336                                                                 newstats.dos.alloc_size);
 337                 break;
 338
 339         case RAW_SFILEINFO_END_OF_FILE_INFO:
 340         case RAW_SFILEINFO_END_OF_FILE_INFORMATION:
 341                 newstats.st.st_size = info->end_of_file_info.in.size;
 342                 break;
 343
 344         case RAW_SFILEINFO_POSITION_INFORMATION:
 345                 h->position = info->position_information.in.position;
 346                 break;
 347
 348         case RAW_SFILEINFO_MODE_INFORMATION:
 349                 /* this one is a puzzle */
 350                 if (info->mode_information.in.mode != 0 &&
 351                     info->mode_information.in.mode != 2 &&
 352                     info->mode_information.in.mode != 4 &&
 353                     info->mode_information.in.mode != 6) {
 354                         return NT_STATUS_INVALID_PARAMETER;
 355                 }
 356                 h->mode = info->mode_information.in.mode;
 357                 break;
 358
 359         case RAW_SFILEINFO_RENAME_INFORMATION:
 360                 return pvfs_setfileinfo_rename(pvfs, req, h->name,
 361                                                &info->rename_information.in);
 362
 363         case RAW_SFILEINFO_SEC_DESC:
 364                 return pvfs_acl_set(pvfs, req, h->name, h->fd, f->access_mask, info);
 365
 366         default:
 367                 return NT_STATUS_INVALID_LEVEL;
 368         }
 369
 370         /* possibly change the file size */
 371         if (newstats.st.st_size != h->name->st.st_size) {
 372                 if (h->name->dos.attrib & FILE_ATTRIBUTE_DIRECTORY) {
 373                         return NT_STATUS_FILE_IS_A_DIRECTORY;
 374                 }
 375                 if (h->name->stream_name) {
 376                         status = pvfs_stream_truncate(pvfs, h->name, h->fd, newstats.st.st_size);
 377                         if (!NT_STATUS_IS_OK(status)) {
 378                                 return status;
 379                         }
 380                 } else {
 381                         int ret;
 382                         if (f->access_mask &
 383                             (SEC_FILE_WRITE_DATA|SEC_FILE_APPEND_DATA)) {
 384                                 ret = ftruncate(h->fd, newstats.st.st_size);
 385                         } else {
 386                                 ret = truncate(h->name->full_name, newstats.st.st_size);
 387                         }
 388                         if (ret == -1) {
 389                                 return pvfs_map_errno(pvfs, errno);
 390                         }
 391                 }
 392         }
 393
 394         /* possibly change the file timestamps */
 395         ZERO_STRUCT(unix_times);
 396         if (newstats.dos.access_time != h->name->dos.access_time) {
 397                 unix_times.actime = nt_time_to_unix(newstats.dos.access_time);
 398         }
 399         if (newstats.dos.write_time != h->name->dos.write_time) {
 400                 unix_times.modtime = nt_time_to_unix(newstats.dos.write_time);
 401         }
 402         if (unix_times.actime != 0 || unix_times.modtime != 0) {
 403                 if (utime(h->name->full_name, &unix_times) == -1) {
 404                         return pvfs_map_errno(pvfs, errno);
 405                 }
 406         }
 407
 408         /* possibly change the attribute */
 409         if (newstats.dos.attrib != h->name->dos.attrib) {
 410                 mode_t mode = pvfs_fileperms(pvfs, newstats.dos.attrib);
 411                 if (!(h->name->dos.attrib & FILE_ATTRIBUTE_DIRECTORY)) {
 412                         if (fchmod(h->fd, mode) == -1) {
 413                                 return pvfs_map_errno(pvfs, errno);
 414                         }
 415                 }
 416         }
 417
 418         *h->name = newstats;
 419
 420         return pvfs_dosattrib_save(pvfs, h->name, h->fd);
 421 }
 422
 423
 424 /*
 425   set info on a pathname
 426 */
 427 NTSTATUS pvfs_setpathinfo(struct ntvfs_module_context *ntvfs,
 428                           struct ntvfs_request *req, union smb_setfileinfo *info)
 429 {
 430         struct pvfs_state *pvfs = ntvfs->private_data;
 431         struct pvfs_filename *name;
 432         struct pvfs_filename newstats;
 433         NTSTATUS status;
 434         struct utimbuf unix_times;
 435         uint32_t access_needed;
 436
 437         /* resolve the cifs name to a posix name */
 438         status = pvfs_resolve_name(pvfs, req, info->generic.file.path,
 439                                    PVFS_RESOLVE_STREAMS, &name);
 440         if (!NT_STATUS_IS_OK(status)) {
 441                 return status;
 442         }
 443
 444         if (!name->exists) {
 445                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 446         }
 447
 448         access_needed = pvfs_setfileinfo_access(info);
 449         status = pvfs_access_check_simple(pvfs, req, name, access_needed);
 450         if (!NT_STATUS_IS_OK(status)) {
 451                 return status;
 452         }
 453
 454         /* we take a copy of the current file stats, then update
 455            newstats in each of the elements below. At the end we
 456            compare, and make any changes needed */
 457         newstats = *name;
 458
 459         switch (info->generic.level) {
 460         case RAW_SFILEINFO_SETATTR:
 461                 if (!null_time(info->setattr.in.write_time)) {
 462                         unix_to_nt_time(&newstats.dos.write_time, info->setattr.in.write_time);
 463                 }
 464                 if (info->setattr.in.attrib != FILE_ATTRIBUTE_NORMAL) {
 465                         newstats.dos.attrib = info->setattr.in.attrib;
 466                 }
 467                 break;
 468
 469         case RAW_SFILEINFO_SETATTRE:
 470         case RAW_SFILEINFO_STANDARD:
 471                 if (!null_time(info->setattre.in.create_time)) {
 472                         unix_to_nt_time(&newstats.dos.create_time, info->setattre.in.create_time);
 473                 }
 474                 if (!null_time(info->setattre.in.access_time)) {
 475                         unix_to_nt_time(&newstats.dos.access_time, info->setattre.in.access_time);
 476                 }
 477                 if (!null_time(info->setattre.in.write_time)) {
 478                         unix_to_nt_time(&newstats.dos.write_time, info->setattre.in.write_time);
 479                 }
 480                 break;
 481
 482         case RAW_SFILEINFO_EA_SET:
 483                 return pvfs_setfileinfo_ea_set(pvfs, name, -1,
 484                                                info->ea_set.in.num_eas,
 485                                                info->ea_set.in.eas);
 486
 487         case RAW_SFILEINFO_BASIC_INFO:
 488         case RAW_SFILEINFO_BASIC_INFORMATION:
 489                 if (!null_nttime(info->basic_info.in.create_time)) {
 490                         newstats.dos.create_time = info->basic_info.in.create_time;
 491                 }
 492                 if (!null_nttime(info->basic_info.in.access_time)) {
 493                         newstats.dos.access_time = info->basic_info.in.access_time;
 494                 }
 495                 if (!null_nttime(info->basic_info.in.write_time)) {
 496                         newstats.dos.write_time = info->basic_info.in.write_time;
 497                 }
 498                 if (!null_nttime(info->basic_info.in.change_time)) {
 499                         newstats.dos.change_time = info->basic_info.in.change_time;
 500                 }
 501                 if (info->basic_info.in.attrib != 0) {
 502                         newstats.dos.attrib = info->basic_info.in.attrib;
 503                 }
 504                 break;
 505
 506         case RAW_SFILEINFO_ALLOCATION_INFO:
 507         case RAW_SFILEINFO_ALLOCATION_INFORMATION:
 508                 if (info->allocation_info.in.alloc_size > newstats.dos.alloc_size) {
 509                         /* strange. Increasing the allocation size via setpathinfo
 510                            should be silently ignored */
 511                         break;
 512                 }
 513                 newstats.dos.alloc_size = info->allocation_info.in.alloc_size;
 514                 if (newstats.dos.alloc_size < newstats.st.st_size) {
 515                         newstats.st.st_size = newstats.dos.alloc_size;
 516                 }
 517                 newstats.dos.alloc_size = pvfs_round_alloc_size(pvfs,
 518                                                                 newstats.dos.alloc_size);
 519                 break;
 520
 521         case RAW_SFILEINFO_END_OF_FILE_INFO:
 522         case RAW_SFILEINFO_END_OF_FILE_INFORMATION:
 523                 newstats.st.st_size = info->end_of_file_info.in.size;
 524                 break;
 525
 526         case RAW_SFILEINFO_MODE_INFORMATION:
 527                 if (info->mode_information.in.mode != 0 &&
 528                     info->mode_information.in.mode != 2 &&
 529                     info->mode_information.in.mode != 4 &&
 530                     info->mode_information.in.mode != 6) {
 531                         return NT_STATUS_INVALID_PARAMETER;
 532                 }
 533                 return NT_STATUS_OK;
 534
 535         case RAW_SFILEINFO_RENAME_INFORMATION:
 536                 return pvfs_setfileinfo_rename(pvfs, req, name,
 537                                                &info->rename_information.in);
 538
 539         case RAW_SFILEINFO_DISPOSITION_INFO:
 540         case RAW_SFILEINFO_DISPOSITION_INFORMATION:
 541         case RAW_SFILEINFO_POSITION_INFORMATION:
 542                 return NT_STATUS_OK;
 543
 544         default:
 545                 return NT_STATUS_INVALID_LEVEL;
 546         }
 547
 548         /* possibly change the file size */
 549         if (newstats.st.st_size != name->st.st_size) {
 550                 if (name->stream_name) {
 551                         status = pvfs_stream_truncate(pvfs, name, -1, newstats.st.st_size);
 552                         if (!NT_STATUS_IS_OK(status)) {
 553                                 return status;
 554                         }
 555                 } else if (truncate(name->full_name, newstats.st.st_size) == -1) {
 556                         return pvfs_map_errno(pvfs, errno);
 557                 }
 558         }
 559
 560         /* possibly change the file timestamps */
 561         ZERO_STRUCT(unix_times);
 562         if (newstats.dos.access_time != name->dos.access_time) {
 563                 unix_times.actime = nt_time_to_unix(newstats.dos.access_time);
 564         }
 565         if (newstats.dos.write_time != name->dos.write_time) {
 566                 unix_times.modtime = nt_time_to_unix(newstats.dos.write_time);
 567         }
 568         if (unix_times.actime != 0 || unix_times.modtime != 0) {
 569                 if (utime(name->full_name, &unix_times) == -1) {
 570                         return pvfs_map_errno(pvfs, errno);
 571                 }
 572         }
 573
 574         /* possibly change the attribute */
 575         newstats.dos.attrib |= (name->dos.attrib & FILE_ATTRIBUTE_DIRECTORY);
 576         if (newstats.dos.attrib != name->dos.attrib) {
 577                 mode_t mode = pvfs_fileperms(pvfs, newstats.dos.attrib);
 578                 if (chmod(name->full_name, mode) == -1) {
 579                         return pvfs_map_errno(pvfs, errno);
 580                 }
 581         }
 582
 583         *name = newstats;
 584
 585         return pvfs_dosattrib_save(pvfs, name, -1);
 586 }
 587