source3/modules/vfs_tru64acl.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    VFS module to get and set Tru64 acls
   4    Copyright (C) Michael Adam 2006,2008
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "includes.h"
  21 #include "system/filesys.h"
  22 #include "smbd/smbd.h"
  23 #include "modules/vfs_tru64acl.h"
  24
  25 /* prototypes for private functions first - for clarity */
  26
  27 static struct smb_acl_t *tru64_acl_to_smb_acl(const struct acl *tru64_acl,
  28                                               TALLOC_CTX *mem_ctx);
  29 static bool tru64_ace_to_smb_ace(acl_entry_t tru64_ace,
  30                                 struct smb_acl_entry *smb_ace);
  31 static acl_t smb_acl_to_tru64_acl(const SMB_ACL_T smb_acl);
  32 static acl_tag_t smb_tag_to_tru64(SMB_ACL_TAG_T smb_tag);
  33 static SMB_ACL_TAG_T tru64_tag_to_smb(acl_tag_t tru64_tag);
  34 static acl_perm_t smb_permset_to_tru64(SMB_ACL_PERM_T smb_permset);
  35 static SMB_ACL_PERM_T tru64_permset_to_smb(const acl_perm_t tru64_permset);
  36
  37
  38 /* public functions - the api */
  39
  40 SMB_ACL_T tru64acl_sys_acl_get_file(vfs_handle_struct *handle,
  41                                     const char *path_p,
  42                                     SMB_ACL_TYPE_T type,
  43                                     TALLOC_CTX *mem_ctx)
  44 {
  45         struct smb_acl_t *result;
  46         acl_type_t the_acl_type;
  47         acl_t tru64_acl;
  48
  49         DEBUG(10, ("Hi! This is tru64acl_sys_acl_get_file.\n"));
  50
  51         switch(type) {
  52         case SMB_ACL_TYPE_ACCESS:
  53                 the_acl_type = ACL_TYPE_ACCESS;
  54                 break;
  55         case SMB_ACL_TYPE_DEFAULT:
  56                 the_acl_type = ACL_TYPE_DEFAULT;
  57                 break;
  58         default:
  59                 errno = EINVAL;
  60                 return NULL;
  61         }
  62
  63         tru64_acl = acl_get_file((char *)path_p, the_acl_type);
  64
  65         if (tru64_acl == NULL) {
  66                 return NULL;
  67         }
  68
  69         result = tru64_acl_to_smb_acl(tru64_acl, mem_ctx);
  70         acl_free(tru64_acl);
  71         return result;
  72 }
  73
  74 SMB_ACL_T tru64acl_sys_acl_get_fd(vfs_handle_struct *handle,
  75                                   files_struct *fsp,
  76                                   TALLOC_CTX *mem_ctx)
  77 {
  78         struct smb_acl_t *result;
  79         acl_t tru64_acl = acl_get_fd(fsp->fh->fd, ACL_TYPE_ACCESS);
  80
  81         if (tru64_acl == NULL) {
  82                 return NULL;
  83         }
  84
  85         result = tru64_acl_to_smb_acl(tru64_acl, mem_ctx);
  86         acl_free(tru64_acl);
  87         return result;
  88 }
  89
  90 int tru64acl_sys_acl_set_file(vfs_handle_struct *handle,
  91                               const char *name,
  92                               SMB_ACL_TYPE_T type,
  93                               SMB_ACL_T theacl)
  94 {
  95         int res;
  96         acl_type_t the_acl_type;
  97         acl_t tru64_acl;
  98
  99         DEBUG(10, ("tru64acl_sys_acl_set_file called with name %s, type %d\n",
 100                         name, type));
 101
 102         switch(type) {
 103         case SMB_ACL_TYPE_ACCESS:
 104                 DEBUGADD(10, ("got acl type ACL_TYPE_ACCESS\n"));
 105                 the_acl_type = ACL_TYPE_ACCESS;
 106                 break;
 107         case SMB_ACL_TYPE_DEFAULT:
 108                 DEBUGADD(10, ("got acl type ACL_TYPE_DEFAULT\n"));
 109                 the_acl_type = ACL_TYPE_DEFAULT;
 110                 break;
 111         default:
 112                 DEBUGADD(10, ("invalid acl type\n"));
 113                 errno = EINVAL;
 114                 goto fail;
 115         }
 116
 117         tru64_acl = smb_acl_to_tru64_acl(theacl);
 118         if (tru64_acl == NULL) {
 119                 DEBUG(10, ("smb_acl_to_tru64_acl failed!\n"));
 120                 goto fail;
 121         }
 122         DEBUG(10, ("got tru64 acl...\n"));
 123         res = acl_set_file((char *)name, the_acl_type, tru64_acl);
 124         acl_free(tru64_acl);
 125         if (res != 0) {
 126                 DEBUG(10, ("acl_set_file failed: %s\n", strerror(errno)));
 127                 goto fail;
 128         }
 129         return res;
 130 fail:
 131         DEBUG(1, ("tru64acl_sys_acl_set_file failed!\n"));
 132         return -1;
 133 }
 134
 135 int tru64acl_sys_acl_set_fd(vfs_handle_struct *handle,
 136                             files_struct *fsp,
 137                             SMB_ACL_T theacl)
 138 {
 139         int res;
 140         acl_t tru64_acl = smb_acl_to_tru64_acl(theacl);
 141         if (tru64_acl == NULL) {
 142                 return -1;
 143         }
 144         res =  acl_set_fd(fsp->fh->fd, ACL_TYPE_ACCESS, tru64_acl);
 145         acl_free(tru64_acl);
 146         return res;
 147
 148 }
 149
 150 int tru64acl_sys_acl_delete_def_file(vfs_handle_struct *handle,
 151                                      const char *path)
 152 {
 153         return acl_delete_def_file((char *)path);
 154 }
 155
 156
 157 /* private functions */
 158
 159 static struct smb_acl_t *tru64_acl_to_smb_acl(const struct acl *tru64_acl,
 160                                               TALLOC_CTX *mem_ctx)
 161 {
 162         struct smb_acl_t *result;
 163         acl_entry_t entry;
 164
 165         DEBUG(10, ("Hi! This is tru64_acl_to_smb_acl.\n"));
 166
 167         if ((result = sys_acl_init(mem_ctx)) == NULL) {
 168                 DEBUG(0, ("sys_acl_init() failed in tru64_acl_to_smb_acl\n"));
 169                 errno = ENOMEM;
 170                 goto fail;
 171         }
 172         if (acl_first_entry((struct acl *)tru64_acl) != 0) {
 173                 DEBUG(10, ("acl_first_entry failed: %s\n", strerror(errno)));
 174                 goto fail;
 175         }
 176         while ((entry = acl_get_entry((struct acl *)tru64_acl)) != NULL) {
 177                 result->acl = talloc_realloc(result, result->acl, struct smb_acl_entry,
 178                                              result->count + 1);
 179                 if (result->acl == NULL) {
 180                         TALLOC_FREE(result);
 181                         DEBUG(0, ("talloc_realloc failed in tru64_acl_to_smb_acl\n"));
 182                         errno = ENOMEM;
 183                         goto fail;
 184                 }
 185                 /* XYZ */
 186                 if (!tru64_ace_to_smb_ace(entry, &result->acl[result->count])) {
 187                         TALLOC_FREE(result);
 188                         goto fail;
 189                 }
 190                 result->count += 1;
 191         }
 192         return result;
 193
 194 fail:
 195         TALLOC_FREE(result);
 196         DEBUG(1, ("tru64_acl_to_smb_acl failed!\n"));
 197         return NULL;
 198 }
 199
 200 static bool tru64_ace_to_smb_ace(acl_entry_t tru64_ace,
 201                                 struct smb_acl_entry *smb_ace)
 202 {
 203         acl_tag_t tru64_tag;
 204         acl_permset_t permset;
 205         SMB_ACL_TAG_T smb_tag_type;
 206         SMB_ACL_PERM_T smb_permset;
 207         void *qualifier;
 208
 209         if (acl_get_tag_type(tru64_ace, &tru64_tag) != 0) {
 210                 DEBUG(0, ("acl_get_tag_type failed: %s\n", strerror(errno)));
 211                 return False;
 212         }
 213
 214         /* On could set the tag type directly to save a function call,
 215          * but I like this better... */
 216         smb_tag_type = tru64_tag_to_smb(tru64_tag);
 217         if (smb_tag_type == 0) {
 218                 DEBUG(3, ("invalid tag type given: %d\n", tru64_tag));
 219                 return False;
 220         }
 221         if (sys_acl_set_tag_type(smb_ace, smb_tag_type) != 0) {
 222                 DEBUG(3, ("sys_acl_set_tag_type failed: %s\n",
 223                                 strerror(errno)));
 224                 return False;
 225         }
 226         qualifier = acl_get_qualifier(tru64_ace);
 227         if (qualifier != NULL) {
 228                 if (sys_acl_set_qualifier(smb_ace, qualifier) != 0) {
 229                         DEBUG(3, ("sys_acl_set_qualifier failed\n"));
 230                         return False;
 231                 }
 232         }
 233         if (acl_get_permset(tru64_ace, &permset) != 0) {
 234                 DEBUG(3, ("acl_get_permset failed: %s\n", strerror(errno)));
 235                 return False;
 236         }
 237         smb_permset = tru64_permset_to_smb(*permset);
 238         if (sys_acl_set_permset(smb_ace, &smb_permset) != 0) {
 239                 DEBUG(3, ("sys_acl_set_permset failed: %s\n", strerror(errno)));
 240                 return False;
 241         }
 242         return True;
 243 }
 244
 245 static acl_t smb_acl_to_tru64_acl(const SMB_ACL_T smb_acl)
 246 {
 247         acl_t result;
 248         acl_entry_t tru64_entry;
 249         int i;
 250         char *acl_text;
 251         ssize_t acl_text_len;
 252
 253         /* The tru64 acl_init function takes a size_t value
 254          * instead of a count of entries (as with posix).
 255          * the size parameter "Specifies the size of the working
 256          * storage in bytes" (according to the man page).
 257          * But it is unclear to me, how this size is to be
 258          * calculated.
 259          *
 260          * It should not matter, since acl_create_entry enlarges
 261          * the working storage at need. ... */
 262
 263         DEBUG(10, ("Hi! This is smb_acl_to_tru64_acl.\n"));
 264
 265         result = acl_init(1);
 266
 267         if (result == NULL) {
 268                 DEBUG(3, ("acl_init failed!\n"));
 269                 goto fail;
 270         }
 271
 272         DEBUGADD(10, ("parsing acl entries...\n"));
 273         for (i = 0; i < smb_acl->count; i++) {
 274                 /* XYZ - maybe eliminate this direct access? */
 275                 const struct smb_acl_entry *smb_entry = &smb_acl->acl[i];
 276                 acl_tag_t tru64_tag;
 277                 acl_perm_t tru64_permset;
 278
 279                 tru64_tag = smb_tag_to_tru64(smb_entry->a_type);
 280                 if (tru64_tag == -1) {
 281                         DEBUG(3, ("smb_tag_to_tru64 failed!\n"));
 282                         goto fail;
 283                 }
 284
 285                 if (tru64_tag == ACL_MASK) {
 286                         DEBUGADD(10, (" - acl type ACL_MASK: not implemented on Tru64 ==> skipping\n"));
 287                         continue;
 288                 }
 289
 290                 tru64_entry = acl_create_entry(&result);
 291                 if (tru64_entry == NULL) {
 292                         DEBUG(3, ("acl_create_entry failed: %s\n",
 293                                         strerror(errno)));
 294                         goto fail;
 295                 }
 296
 297                 if (acl_set_tag_type(tru64_entry, tru64_tag) != 0) {
 298                         DEBUG(3, ("acl_set_tag_type(%d) failed: %s\n",
 299                                         strerror(errno)));
 300                         goto fail;
 301                 }
 302
 303                 switch (smb_entry->a_type) {
 304                 case SMB_ACL_USER:
 305                         if (acl_set_qualifier(tru64_entry,
 306                                                 (int *)&smb_entry->info.user.uid) != 0)
 307                         {
 308                                 DEBUG(3, ("acl_set_qualifier failed: %s\n",
 309                                         strerror(errno)));
 310                                 goto fail;
 311                         }
 312                         DEBUGADD(10, (" - setting uid to %d\n", smb_entry->info.user.uid));
 313                         break;
 314                 case SMB_ACL_GROUP:
 315                         if (acl_set_qualifier(tru64_entry,
 316                                                 (int *)&smb_entry->info.group.gid) != 0)
 317                         {
 318                                 DEBUG(3, ("acl_set_qualifier failed: %s\n",
 319                                         strerror(errno)));
 320                                 goto fail;
 321                         }
 322                         DEBUGADD(10, (" - setting gid to %d\n", smb_entry->info.group.gid));
 323                         break;
 324                 default:
 325                         break;
 326                 }
 327
 328                 tru64_permset = smb_permset_to_tru64(smb_entry->a_perm);
 329                 if (tru64_permset == -1) {
 330                         DEBUG(3, ("smb_permset_to_tru64 failed!\n"));
 331                         goto fail;
 332                 }
 333                 DEBUGADD(10, (" - setting perms to %0d\n", tru64_permset));
 334                 if (acl_set_permset(tru64_entry, &tru64_permset) != 0)
 335                 {
 336                         DEBUG(3, ("acl_set_permset failed: %s\n", strerror(errno)));
 337                         goto fail;
 338                 }
 339         } /* for */
 340         DEBUGADD(10, ("done parsing acl entries\n"));
 341
 342         tru64_entry = NULL;
 343         if (acl_valid(result, &tru64_entry) != 0) {
 344                 DEBUG(1, ("smb_acl_to_tru64_acl: ACL is invalid (%s)\n",
 345                                 strerror(errno)));
 346                 if (tru64_entry != NULL) {
 347                         DEBUGADD(1, ("the acl contains duplicate entries\n"));
 348                 }
 349                 goto fail;
 350         }
 351         DEBUGADD(10, ("acl is valid\n"));
 352
 353         acl_text = acl_to_text(result, &acl_text_len);
 354         if (acl_text == NULL) {
 355                 DEBUG(3, ("acl_to_text failed: %s\n", strerror(errno)));
 356                 goto fail;
 357         }
 358         DEBUG(1, ("acl_text: %s\n", acl_text));
 359         free(acl_text);
 360
 361         return result;
 362
 363 fail:
 364         if (result != NULL) {
 365                 acl_free(result);
 366         }
 367         DEBUG(1, ("smb_acl_to_tru64_acl failed!\n"));
 368         return NULL;
 369 }
 370
 371 static acl_tag_t smb_tag_to_tru64(SMB_ACL_TAG_T smb_tag)
 372 {
 373         acl_tag_t result;
 374         switch (smb_tag) {
 375         case SMB_ACL_USER:
 376                 result = ACL_USER;
 377                 DEBUGADD(10, ("got acl type ACL_USER\n"));
 378                 break;
 379         case SMB_ACL_USER_OBJ:
 380                 result = ACL_USER_OBJ;
 381                 DEBUGADD(10, ("got acl type ACL_USER_OBJ\n"));
 382                 break;
 383         case SMB_ACL_GROUP:
 384                 result = ACL_GROUP;
 385                 DEBUGADD(10, ("got acl type ACL_GROUP\n"));
 386                 break;
 387         case SMB_ACL_GROUP_OBJ:
 388                 result = ACL_GROUP_OBJ;
 389                 DEBUGADD(10, ("got acl type ACL_GROUP_OBJ\n"));
 390                 break;
 391         case SMB_ACL_OTHER:
 392                 result = ACL_OTHER;
 393                 DEBUGADD(10, ("got acl type ACL_OTHER\n"));
 394                 break;
 395         case SMB_ACL_MASK:
 396                 result = ACL_MASK;
 397                 DEBUGADD(10, ("got acl type ACL_MASK\n"));
 398                 break;
 399         default:
 400                 DEBUG(1, ("Unknown tag type %d\n", smb_tag));
 401                 result = -1;
 402         }
 403         return result;
 404 }
 405
 406
 407 static SMB_ACL_TAG_T tru64_tag_to_smb(acl_tag_t tru64_tag)
 408 {
 409         SMB_ACL_TAG_T smb_tag_type;
 410         switch(tru64_tag) {
 411         case ACL_USER:
 412                 smb_tag_type = SMB_ACL_USER;
 413                 DEBUGADD(10, ("got smb acl tag type SMB_ACL_USER\n"));
 414                 break;
 415         case ACL_USER_OBJ:
 416                 smb_tag_type = SMB_ACL_USER_OBJ;
 417                 DEBUGADD(10, ("got smb acl tag type SMB_ACL_USER_OBJ\n"));
 418                 break;
 419         case ACL_GROUP:
 420                 smb_tag_type = SMB_ACL_GROUP;
 421                 DEBUGADD(10, ("got smb acl tag type SMB_ACL_GROUP\n"));
 422                 break;
 423         case ACL_GROUP_OBJ:
 424                 smb_tag_type = SMB_ACL_GROUP_OBJ;
 425                 DEBUGADD(10, ("got smb acl tag type SMB_ACL_GROUP_OBJ\n"));
 426                 break;
 427         case ACL_OTHER:
 428                 smb_tag_type = SMB_ACL_OTHER;
 429                 DEBUGADD(10, ("got smb acl tag type SMB_ACL_OTHER\n"));
 430                 break;
 431         case ACL_MASK:
 432                 smb_tag_type = SMB_ACL_MASK;
 433                 DEBUGADD(10, ("got smb acl tag type SMB_ACL_MASK\n"));
 434                 break;
 435         default:
 436                 DEBUG(0, ("Unknown tag type %d\n", (unsigned int)tru64_tag));
 437                 smb_tag_type = 0;
 438         }
 439         return smb_tag_type;
 440 }
 441
 442 static acl_perm_t smb_permset_to_tru64(SMB_ACL_PERM_T smb_permset)
 443 {
 444         /* originally, I thought that acl_clear_perm was the
 445          * proper way to reset the permset to 0. but without
 446          * initializing it to 0, acl_clear_perm fails.
 447          * so probably, acl_clear_perm is not necessary here... ?! */
 448         acl_perm_t tru64_permset = 0;
 449         if (acl_clear_perm(&tru64_permset) != 0) {
 450                 DEBUG(5, ("acl_clear_perm failed: %s\n", strerror(errno)));
 451                 return -1;
 452         }
 453         /* according to original lib/sysacls.c, acl_add_perm is
 454          * broken on tru64 ... */
 455         tru64_permset |= ((smb_permset & SMB_ACL_READ) ? ACL_READ : 0);
 456         tru64_permset |= ((smb_permset & SMB_ACL_WRITE) ? ACL_WRITE : 0);
 457         tru64_permset |= ((smb_permset & SMB_ACL_EXECUTE) ? ACL_EXECUTE : 0);
 458         return tru64_permset;
 459 }
 460
 461 static SMB_ACL_PERM_T tru64_permset_to_smb(const acl_perm_t tru64_permset)
 462 {
 463         SMB_ACL_PERM_T smb_permset  = 0;
 464         smb_permset |= ((tru64_permset & ACL_READ) ? SMB_ACL_READ : 0);
 465         smb_permset |= ((tru64_permset & ACL_WRITE) ? SMB_ACL_WRITE : 0);
 466         smb_permset |= ((tru64_permset & ACL_EXECUTE) ? SMB_ACL_EXECUTE : 0);
 467         return smb_permset;
 468 }
 469
 470
 471 /* VFS operations structure */
 472
 473 static struct vfs_fn_pointers tru64acl_fns = {
 474         .sys_acl_get_file_fn = tru64acl_sys_acl_get_file,
 475         .sys_acl_get_fd_fn = tru64acl_sys_acl_get_fd,
 476         .sys_acl_set_file_fn = tru64acl_sys_acl_set_file,
 477         .sys_acl_set_fd_fn = tru64acl_sys_acl_set_fd,
 478         .sys_acl_delete_def_file_fn = tru64acl_sys_acl_delete_def_file,
 479 };
 480
 481 NTSTATUS vfs_tru64acl_init(void);
 482 NTSTATUS vfs_tru64acl_init(void)
 483 {
 484         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "tru64acl",
 485                                 &tru64acl_fns);
 486 }
 487
 488 /* ENTE */