source3/modules/nfs4_acls.c

   1 /*
   2  * NFS4 ACL handling
   3  *
   4  * Copyright (C) Jim McDonough, 2006
   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 "nfs4_acls.h"
  22
  23 #undef DBGC_CLASS
  24 #define DBGC_CLASS DBGC_ACLS
  25
  26 #define SMBACL4_PARAM_TYPE_NAME "nfs4"
  27
  28 extern const struct generic_mapping file_generic_mapping;
  29
  30 #define SMB_ACE4_INT_MAGIC 0x76F8A967
  31 typedef struct _SMB_ACE4_INT_T
  32 {
  33         uint32  magic;
  34         SMB_ACE4PROP_T  prop;
  35         void    *next;
  36 } SMB_ACE4_INT_T;
  37
  38 #define SMB_ACL4_INT_MAGIC 0x29A3E792
  39 typedef struct _SMB_ACL4_INT_T
  40 {
  41         uint32  magic;
  42         uint32  naces;
  43         SMB_ACE4_INT_T  *first;
  44         SMB_ACE4_INT_T  *last;
  45 } SMB_ACL4_INT_T;
  46
  47 static SMB_ACL4_INT_T *get_validated_aclint(SMB4ACL_T *theacl)
  48 {
  49         SMB_ACL4_INT_T *aclint = (SMB_ACL4_INT_T *)theacl;
  50         if (theacl==NULL)
  51         {
  52                 DEBUG(2, ("acl is NULL\n"));
  53                 errno = EINVAL;
  54                 return NULL;
  55         }
  56         if (aclint->magic!=SMB_ACL4_INT_MAGIC)
  57         {
  58                 DEBUG(2, ("aclint bad magic 0x%x\n", aclint->magic));
  59                 errno = EINVAL;
  60                 return NULL;
  61         }
  62         return aclint;
  63 }
  64
  65 static SMB_ACE4_INT_T *get_validated_aceint(SMB4ACE_T *ace)
  66 {
  67         SMB_ACE4_INT_T *aceint = (SMB_ACE4_INT_T *)ace;
  68         if (ace==NULL)
  69         {
  70                 DEBUG(2, ("ace is NULL\n"));
  71                 errno = EINVAL;
  72                 return NULL;
  73         }
  74         if (aceint->magic!=SMB_ACE4_INT_MAGIC)
  75         {
  76                 DEBUG(2, ("aceint bad magic 0x%x\n", aceint->magic));
  77                 errno = EINVAL;
  78                 return NULL;
  79         }
  80         return aceint;
  81 }
  82
  83 SMB4ACL_T *smb_create_smb4acl(void)
  84 {
  85         TALLOC_CTX *mem_ctx = talloc_tos();
  86         SMB_ACL4_INT_T  *theacl = (SMB_ACL4_INT_T *)TALLOC_ZERO_SIZE(mem_ctx, sizeof(SMB_ACL4_INT_T));
  87         if (theacl==NULL)
  88         {
  89                 DEBUG(0, ("TALLOC_SIZE failed\n"));
  90                 errno = ENOMEM;
  91                 return NULL;
  92         }
  93         theacl->magic = SMB_ACL4_INT_MAGIC;
  94         /* theacl->first, last = NULL not needed */
  95         return (SMB4ACL_T *)theacl;
  96 }
  97
  98 SMB4ACE_T *smb_add_ace4(SMB4ACL_T *theacl, SMB_ACE4PROP_T *prop)
  99 {
 100         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 101         TALLOC_CTX *mem_ctx = talloc_tos();
 102         SMB_ACE4_INT_T *ace;
 103
 104         ace = (SMB_ACE4_INT_T *)TALLOC_ZERO_SIZE(mem_ctx, sizeof(SMB_ACE4_INT_T));
 105         if (ace==NULL)
 106         {
 107                 DEBUG(0, ("TALLOC_SIZE failed\n"));
 108                 errno = ENOMEM;
 109                 return NULL;
 110         }
 111         ace->magic = SMB_ACE4_INT_MAGIC;
 112         /* ace->next = NULL not needed */
 113         memcpy(&ace->prop, prop, sizeof(SMB_ACE4PROP_T));
 114
 115         if (aclint->first==NULL)
 116         {
 117                 aclint->first = ace;
 118                 aclint->last = ace;
 119         } else {
 120                 aclint->last->next = (void *)ace;
 121                 aclint->last = ace;
 122         }
 123         aclint->naces++;
 124
 125         return (SMB4ACE_T *)ace;
 126 }
 127
 128 SMB_ACE4PROP_T *smb_get_ace4(SMB4ACE_T *ace)
 129 {
 130         SMB_ACE4_INT_T *aceint = get_validated_aceint(ace);
 131         if (aceint==NULL)
 132                 return NULL;
 133
 134         return &aceint->prop;
 135 }
 136
 137 SMB4ACE_T *smb_next_ace4(SMB4ACE_T *ace)
 138 {
 139         SMB_ACE4_INT_T *aceint = get_validated_aceint(ace);
 140         if (aceint==NULL)
 141                 return NULL;
 142
 143         return (SMB4ACE_T *)aceint->next;
 144 }
 145
 146 SMB4ACE_T *smb_first_ace4(SMB4ACL_T *theacl)
 147 {
 148         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 149         if (aclint==NULL)
 150                 return NULL;
 151
 152         return (SMB4ACE_T *)aclint->first;
 153 }
 154
 155 uint32 smb_get_naces(SMB4ACL_T *theacl)
 156 {
 157         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 158         if (aclint==NULL)
 159                 return 0;
 160
 161         return aclint->naces;
 162 }
 163
 164 static int smbacl4_GetFileOwner(struct connection_struct *conn,
 165                                 const char *filename,
 166                                 SMB_STRUCT_STAT *psbuf)
 167 {
 168         memset(psbuf, 0, sizeof(SMB_STRUCT_STAT));
 169
 170         /* Get the stat struct for the owner info. */
 171         if (vfs_stat_smb_fname(conn, filename, psbuf) != 0)
 172         {
 173                 DEBUG(8, ("SMB_VFS_STAT failed with error %s\n",
 174                         strerror(errno)));
 175                 return -1;
 176         }
 177
 178         return 0;
 179 }
 180
 181 static int smbacl4_fGetFileOwner(files_struct *fsp, SMB_STRUCT_STAT *psbuf)
 182 {
 183         memset(psbuf, 0, sizeof(SMB_STRUCT_STAT));
 184
 185         if (fsp->is_directory || fsp->fh->fd == -1) {
 186                 return smbacl4_GetFileOwner(fsp->conn, fsp->fsp_name, psbuf);
 187         }
 188         if (SMB_VFS_FSTAT(fsp, psbuf) != 0)
 189         {
 190                 DEBUG(8, ("SMB_VFS_FSTAT failed with error %s\n",
 191                         strerror(errno)));
 192                 return -1;
 193         }
 194
 195         return 0;
 196 }
 197
 198 static bool smbacl4_nfs42win(TALLOC_CTX *mem_ctx, SMB4ACL_T *theacl, /* in */
 199         DOM_SID *psid_owner, /* in */
 200         DOM_SID *psid_group, /* in */
 201         bool is_directory, /* in */
 202         SEC_ACE **ppnt_ace_list, /* out */
 203         int *pgood_aces /* out */
 204 )
 205 {
 206         SMB_ACL4_INT_T *aclint = (SMB_ACL4_INT_T *)theacl;
 207         SMB_ACE4_INT_T *aceint;
 208         SEC_ACE *nt_ace_list = NULL;
 209         int good_aces = 0;
 210
 211         DEBUG(10, ("smbacl_nfs42win entered"));
 212
 213         aclint = get_validated_aclint(theacl);
 214         /* We do not check for naces being 0 or theacl being NULL here because it is done upstream */
 215         /* in smb_get_nt_acl_nfs4(). */
 216         nt_ace_list = (SEC_ACE *)TALLOC_ZERO_SIZE(mem_ctx, aclint->naces * sizeof(SEC_ACE));
 217         if (nt_ace_list==NULL)
 218         {
 219                 DEBUG(10, ("talloc error"));
 220                 errno = ENOMEM;
 221                 return False;
 222         }
 223
 224         for (aceint=aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
 225                 uint32_t mask;
 226                 DOM_SID sid;
 227                 SMB_ACE4PROP_T  *ace = &aceint->prop;
 228
 229                 DEBUG(10, ("magic: 0x%x, type: %d, iflags: %x, flags: %x, mask: %x, "
 230                         "who: %d\n", aceint->magic, ace->aceType, ace->flags,
 231                         ace->aceFlags, ace->aceMask, ace->who.id));
 232
 233                 SMB_ASSERT(aceint->magic==SMB_ACE4_INT_MAGIC);
 234
 235                 if (ace->flags & SMB_ACE4_ID_SPECIAL) {
 236                         switch (ace->who.special_id) {
 237                         case SMB_ACE4_WHO_OWNER:
 238                                 sid_copy(&sid, psid_owner);
 239                                 break;
 240                         case SMB_ACE4_WHO_GROUP:
 241                                 sid_copy(&sid, psid_group);
 242                                 break;
 243                         case SMB_ACE4_WHO_EVERYONE:
 244                                 sid_copy(&sid, &global_sid_World);
 245                                 break;
 246                         default:
 247                                 DEBUG(8, ("invalid special who id %d "
 248                                         "ignored\n", ace->who.special_id));
 249                         }
 250                 } else {
 251                         if (ace->aceFlags & SMB_ACE4_IDENTIFIER_GROUP) {
 252                                 gid_to_sid(&sid, ace->who.gid);
 253                         } else {
 254                                 uid_to_sid(&sid, ace->who.uid);
 255                         }
 256                 }
 257                 DEBUG(10, ("mapped %d to %s\n", ace->who.id,
 258                            sid_string_dbg(&sid)));
 259
 260                 if (is_directory && (ace->aceMask & SMB_ACE4_ADD_FILE)) {
 261                         ace->aceMask |= SMB_ACE4_DELETE_CHILD;
 262                 }
 263
 264                 mask = ace->aceMask;
 265                 init_sec_ace(&nt_ace_list[good_aces++], &sid,
 266                         ace->aceType, mask,
 267                         ace->aceFlags & 0xf);
 268         }
 269
 270         *ppnt_ace_list = nt_ace_list;
 271         *pgood_aces = good_aces;
 272
 273         return True;
 274 }
 275
 276 static NTSTATUS smb_get_nt_acl_nfs4_common(const SMB_STRUCT_STAT *sbuf,
 277         uint32 security_info,
 278         SEC_DESC **ppdesc, SMB4ACL_T *theacl)
 279 {
 280         int     good_aces = 0;
 281         DOM_SID sid_owner, sid_group;
 282         size_t sd_size = 0;
 283         SEC_ACE *nt_ace_list = NULL;
 284         SEC_ACL *psa = NULL;
 285         TALLOC_CTX *mem_ctx = talloc_tos();
 286
 287         if (theacl==NULL || smb_get_naces(theacl)==0)
 288                 return NT_STATUS_ACCESS_DENIED; /* special because we
 289                                                  * shouldn't alloc 0 for
 290                                                  * win */
 291
 292         uid_to_sid(&sid_owner, sbuf->st_ex_uid);
 293         gid_to_sid(&sid_group, sbuf->st_ex_gid);
 294
 295         if (smbacl4_nfs42win(mem_ctx, theacl, &sid_owner, &sid_group,
 296                              S_ISDIR(sbuf->st_ex_mode),
 297                                 &nt_ace_list, &good_aces)==False) {
 298                 DEBUG(8,("smbacl4_nfs42win failed\n"));
 299                 return map_nt_error_from_unix(errno);
 300         }
 301
 302         psa = make_sec_acl(mem_ctx, NT4_ACL_REVISION, good_aces, nt_ace_list);
 303         if (psa == NULL) {
 304                 DEBUG(2,("make_sec_acl failed\n"));
 305                 return NT_STATUS_NO_MEMORY;
 306         }
 307
 308         DEBUG(10,("after make sec_acl\n"));
 309         *ppdesc = make_sec_desc(mem_ctx, SEC_DESC_REVISION, SEC_DESC_SELF_RELATIVE,
 310                                 (security_info & OWNER_SECURITY_INFORMATION) ? &sid_owner : NULL,
 311                                 (security_info & GROUP_SECURITY_INFORMATION) ? &sid_group : NULL,
 312                                 NULL, psa, &sd_size);
 313         if (*ppdesc==NULL) {
 314                 DEBUG(2,("make_sec_desc failed\n"));
 315                 return NT_STATUS_NO_MEMORY;
 316         }
 317
 318         DEBUG(10, ("smb_get_nt_acl_nfs4_common successfully exited with sd_size %d\n",
 319                    (int)ndr_size_security_descriptor(*ppdesc, NULL, 0)));
 320
 321         return NT_STATUS_OK;
 322 }
 323
 324 NTSTATUS smb_fget_nt_acl_nfs4(files_struct *fsp,
 325                                uint32 security_info,
 326                                SEC_DESC **ppdesc, SMB4ACL_T *theacl)
 327 {
 328         SMB_STRUCT_STAT sbuf;
 329
 330         DEBUG(10, ("smb_fget_nt_acl_nfs4 invoked for %s\n", fsp->fsp_name));
 331
 332         if (smbacl4_fGetFileOwner(fsp, &sbuf)) {
 333                 return map_nt_error_from_unix(errno);
 334         }
 335
 336         return smb_get_nt_acl_nfs4_common(&sbuf, security_info, ppdesc, theacl);
 337 }
 338
 339 NTSTATUS smb_get_nt_acl_nfs4(struct connection_struct *conn,
 340                               const char *name,
 341                               uint32 security_info,
 342                               SEC_DESC **ppdesc, SMB4ACL_T *theacl)
 343 {
 344         SMB_STRUCT_STAT sbuf;
 345
 346         DEBUG(10, ("smb_get_nt_acl_nfs4 invoked for %s\n", name));
 347
 348         if (smbacl4_GetFileOwner(conn, name, &sbuf)) {
 349                 return map_nt_error_from_unix(errno);
 350         }
 351
 352         return smb_get_nt_acl_nfs4_common(&sbuf, security_info, ppdesc, theacl);
 353 }
 354
 355 enum smbacl4_mode_enum {e_simple=0, e_special=1};
 356 enum smbacl4_acedup_enum {e_dontcare=0, e_reject=1, e_ignore=2, e_merge=3};
 357
 358 typedef struct _smbacl4_vfs_params {
 359         enum smbacl4_mode_enum mode;
 360         bool do_chown;
 361         enum smbacl4_acedup_enum acedup;
 362         struct db_context *sid_mapping_table;
 363 } smbacl4_vfs_params;
 364
 365 /*
 366  * Gather special parameters for NFS4 ACL handling
 367  */
 368 static int smbacl4_get_vfs_params(
 369         const char *type_name,
 370         files_struct *fsp,
 371         smbacl4_vfs_params *params
 372 )
 373 {
 374         static const struct enum_list enum_smbacl4_modes[] = {
 375                 { e_simple, "simple" },
 376                 { e_special, "special" }
 377         };
 378         static const struct enum_list enum_smbacl4_acedups[] = {
 379                 { e_dontcare, "dontcare" },
 380                 { e_reject, "reject" },
 381                 { e_ignore, "ignore" },
 382                 { e_merge, "merge" },
 383         };
 384
 385         memset(params, 0, sizeof(smbacl4_vfs_params));
 386         params->mode = (enum smbacl4_mode_enum)lp_parm_enum(
 387                 SNUM(fsp->conn), type_name,
 388                 "mode", enum_smbacl4_modes, e_simple);
 389         params->do_chown = lp_parm_bool(SNUM(fsp->conn), type_name,
 390                 "chown", True);
 391         params->acedup = (enum smbacl4_acedup_enum)lp_parm_enum(
 392                 SNUM(fsp->conn), type_name,
 393                 "acedup", enum_smbacl4_acedups, e_dontcare);
 394
 395         DEBUG(10, ("mode:%s, do_chown:%s, acedup: %s\n",
 396                 enum_smbacl4_modes[params->mode].name,
 397                 params->do_chown ? "true" : "false",
 398                 enum_smbacl4_acedups[params->acedup].name));
 399
 400         return 0;
 401 }
 402
 403 static void smbacl4_dump_nfs4acl(int level, SMB4ACL_T *theacl)
 404 {
 405         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 406         SMB_ACE4_INT_T *aceint;
 407
 408         DEBUG(level, ("NFS4ACL: size=%d\n", aclint->naces));
 409
 410         for(aceint = aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
 411                 SMB_ACE4PROP_T *ace = &aceint->prop;
 412
 413                 DEBUG(level, ("\tACE: type=%d, flags=0x%x, fflags=0x%x, mask=0x%x, id=%d\n",
 414                         ace->aceType,
 415                         ace->aceFlags, ace->flags,
 416                         ace->aceMask,
 417                         ace->who.id));
 418         }
 419 }
 420
 421 /*
 422  * Find 2 NFS4 who-special ACE property (non-copy!!!)
 423  * match nonzero if "special" and who is equal
 424  * return ace if found matching; otherwise NULL
 425  */
 426 static SMB_ACE4PROP_T *smbacl4_find_equal_special(
 427         SMB4ACL_T *theacl,
 428         SMB_ACE4PROP_T *aceNew)
 429 {
 430         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 431         SMB_ACE4_INT_T *aceint;
 432
 433         for(aceint = aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
 434                 SMB_ACE4PROP_T *ace = &aceint->prop;
 435
 436                 if (ace->flags == aceNew->flags &&
 437                         ace->aceType==aceNew->aceType &&
 438                         (ace->aceFlags&SMB_ACE4_IDENTIFIER_GROUP)==
 439                         (aceNew->aceFlags&SMB_ACE4_IDENTIFIER_GROUP)
 440                 ) {
 441                         /* keep type safety; e.g. gid is an u.short */
 442                         if (ace->flags & SMB_ACE4_ID_SPECIAL)
 443                         {
 444                                 if (ace->who.special_id==aceNew->who.special_id)
 445                                         return ace;
 446                         } else {
 447                                 if (ace->aceFlags & SMB_ACE4_IDENTIFIER_GROUP)
 448                                 {
 449                                         if (ace->who.gid==aceNew->who.gid)
 450                                                 return ace;
 451                                 } else {
 452                                         if (ace->who.uid==aceNew->who.uid)
 453                                                 return ace;
 454                                 }
 455                         }
 456                 }
 457         }
 458
 459         return NULL;
 460 }
 461
 462 static bool nfs4_map_sid(smbacl4_vfs_params *params, const DOM_SID *src,
 463                          DOM_SID *dst)
 464 {
 465         static struct db_context *mapping_db = NULL;
 466         TDB_DATA data;
 467
 468         if (mapping_db == NULL) {
 469                 const char *dbname = lp_parm_const_string(
 470                         -1, SMBACL4_PARAM_TYPE_NAME, "sidmap", NULL);
 471
 472                 if (dbname == NULL) {
 473                         DEBUG(10, ("%s:sidmap not defined\n",
 474                                    SMBACL4_PARAM_TYPE_NAME));
 475                         return False;
 476                 }
 477
 478                 become_root();
 479                 mapping_db = db_open(NULL, dbname, 0, TDB_DEFAULT,
 480                                      O_RDONLY, 0600);
 481                 unbecome_root();
 482
 483                 if (mapping_db == NULL) {
 484                         DEBUG(1, ("could not open sidmap: %s\n",
 485                                   strerror(errno)));
 486                         return False;
 487                 }
 488         }
 489
 490         if (mapping_db->fetch(mapping_db, NULL,
 491                               string_term_tdb_data(sid_string_tos(src)),
 492                               &data) == -1) {
 493                 DEBUG(10, ("could not find mapping for SID %s\n",
 494                            sid_string_dbg(src)));
 495                 return False;
 496         }
 497
 498         if ((data.dptr == NULL) || (data.dsize <= 0)
 499             || (data.dptr[data.dsize-1] != '\0')) {
 500                 DEBUG(5, ("invalid mapping for SID %s\n",
 501                           sid_string_dbg(src)));
 502                 TALLOC_FREE(data.dptr);
 503                 return False;
 504         }
 505
 506         if (!string_to_sid(dst, (char *)data.dptr)) {
 507                 DEBUG(1, ("invalid mapping %s for SID %s\n",
 508                           (char *)data.dptr, sid_string_dbg(src)));
 509                 TALLOC_FREE(data.dptr);
 510                 return False;
 511         }
 512
 513         TALLOC_FREE(data.dptr);
 514
 515         return True;
 516 }
 517
 518 static bool smbacl4_fill_ace4(
 519         TALLOC_CTX *mem_ctx,
 520         const char *filename,
 521         smbacl4_vfs_params *params,
 522         uid_t ownerUID,
 523         gid_t ownerGID,
 524         const SEC_ACE *ace_nt, /* input */
 525         SMB_ACE4PROP_T *ace_v4 /* output */
 526 )
 527 {
 528         DEBUG(10, ("got ace for %s\n", sid_string_dbg(&ace_nt->trustee)));
 529
 530         memset(ace_v4, 0, sizeof(SMB_ACE4PROP_T));
 531         ace_v4->aceType = ace_nt->type; /* only ACCESS|DENY supported right now */
 532         ace_v4->aceFlags = ace_nt->flags & SEC_ACE_FLAG_VALID_INHERIT;
 533         ace_v4->aceMask = ace_nt->access_mask &
 534                 (STD_RIGHT_ALL_ACCESS | SA_RIGHT_FILE_ALL_ACCESS);
 535
 536         se_map_generic(&ace_v4->aceMask, &file_generic_mapping);
 537
 538         if (ace_v4->aceFlags!=ace_nt->flags)
 539                 DEBUG(9, ("ace_v4->aceFlags(0x%x)!=ace_nt->flags(0x%x)\n",
 540                         ace_v4->aceFlags, ace_nt->flags));
 541
 542         if (ace_v4->aceMask!=ace_nt->access_mask)
 543                 DEBUG(9, ("ace_v4->aceMask(0x%x)!=ace_nt->access_mask(0x%x)\n",
 544                         ace_v4->aceMask, ace_nt->access_mask));
 545
 546         if (sid_equal(&ace_nt->trustee, &global_sid_World)) {
 547                 ace_v4->who.special_id = SMB_ACE4_WHO_EVERYONE;
 548                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
 549         } else {
 550                 const char *dom, *name;
 551                 enum lsa_SidType type;
 552                 uid_t uid;
 553                 gid_t gid;
 554                 DOM_SID sid;
 555
 556                 sid_copy(&sid, &ace_nt->trustee);
 557
 558                 if (!lookup_sid(mem_ctx, &sid, &dom, &name, &type)) {
 559
 560                         DOM_SID mapped;
 561
 562                         if (!nfs4_map_sid(params, &sid, &mapped)) {
 563                                 DEBUG(1, ("nfs4_acls.c: file [%s]: SID %s "
 564                                           "unknown\n", filename, sid_string_dbg(&sid)));
 565                                 errno = EINVAL;
 566                                 return False;
 567                         }
 568
 569                         DEBUG(2, ("nfs4_acls.c: file [%s]: mapped SID %s "
 570                                   "to %s\n", filename, sid_string_dbg(&sid), sid_string_dbg(&mapped)));
 571
 572                         if (!lookup_sid(mem_ctx, &mapped, &dom,
 573                                         &name, &type)) {
 574                                 DEBUG(1, ("nfs4_acls.c: file [%s]: SID %s "
 575                                           "mapped from %s is unknown\n",
 576                                           filename, sid_string_dbg(&mapped), sid_string_dbg(&sid)));
 577                                 errno = EINVAL;
 578                                 return False;
 579                         }
 580
 581                         sid_copy(&sid, &mapped);
 582                 }
 583
 584                 if (type == SID_NAME_USER) {
 585                         if (!sid_to_uid(&sid, &uid)) {
 586                                 DEBUG(1, ("nfs4_acls.c: file [%s]: could not "
 587                                           "convert %s to uid\n", filename,
 588                                           sid_string_dbg(&sid)));
 589                                 return False;
 590                         }
 591
 592                         if (params->mode==e_special && uid==ownerUID) {
 593                                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
 594                                 ace_v4->who.special_id = SMB_ACE4_WHO_OWNER;
 595                         } else {
 596                                 ace_v4->who.uid = uid;
 597                         }
 598                 } else { /* else group? - TODO check it... */
 599                         if (!sid_to_gid(&sid, &gid)) {
 600                                 DEBUG(1, ("nfs4_acls.c: file [%s]: could not "
 601                                           "convert %s to gid\n", filename,
 602                                           sid_string_dbg(&sid)));
 603                                 return False;
 604                         }
 605
 606                         ace_v4->aceFlags |= SMB_ACE4_IDENTIFIER_GROUP;
 607
 608                         if (params->mode==e_special && gid==ownerGID) {
 609                                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
 610                                 ace_v4->who.special_id = SMB_ACE4_WHO_GROUP;
 611                         } else {
 612                                 ace_v4->who.gid = gid;
 613                         }
 614                 }
 615         }
 616
 617         return True; /* OK */
 618 }
 619
 620 static int smbacl4_MergeIgnoreReject(
 621         enum smbacl4_acedup_enum acedup,
 622         SMB4ACL_T *theacl, /* may modify it */
 623         SMB_ACE4PROP_T *ace, /* the "new" ACE */
 624         bool    *paddNewACE,
 625         int     i
 626 )
 627 {
 628         int     result = 0;
 629         SMB_ACE4PROP_T *ace4found = smbacl4_find_equal_special(theacl, ace);
 630         if (ace4found)
 631         {
 632                 switch(acedup)
 633                 {
 634                 case e_merge: /* "merge" flags */
 635                         *paddNewACE = False;
 636                         ace4found->aceFlags |= ace->aceFlags;
 637                         ace4found->aceMask |= ace->aceMask;
 638                         break;
 639                 case e_ignore: /* leave out this record */
 640                         *paddNewACE = False;
 641                         break;
 642                 case e_reject: /* do an error */
 643                         DEBUG(8, ("ACL rejected by duplicate nt ace#%d\n", i));
 644                         errno = EINVAL; /* SHOULD be set on any _real_ error */
 645                         result = -1;
 646                         break;
 647                 default:
 648                         break;
 649                 }
 650         }
 651         return result;
 652 }
 653
 654 static SMB4ACL_T *smbacl4_win2nfs4(
 655         const char *filename,
 656         const SEC_ACL *dacl,
 657         smbacl4_vfs_params *pparams,
 658         uid_t ownerUID,
 659         gid_t ownerGID
 660 )
 661 {
 662         SMB4ACL_T *theacl;
 663         uint32  i;
 664         TALLOC_CTX *mem_ctx = talloc_tos();
 665
 666         DEBUG(10, ("smbacl4_win2nfs4 invoked\n"));
 667
 668         theacl = smb_create_smb4acl();
 669         if (theacl==NULL)
 670                 return NULL;
 671
 672         for(i=0; i<dacl->num_aces; i++) {
 673                 SMB_ACE4PROP_T  ace_v4;
 674                 bool    addNewACE = True;
 675
 676                 if (!smbacl4_fill_ace4(mem_ctx, filename, pparams,
 677                                        ownerUID, ownerGID,
 678                                        dacl->aces + i, &ace_v4)) {
 679                         DEBUG(3, ("Could not fill ace for file %s, SID %s\n",
 680                                   filename,
 681                                   sid_string_dbg(&((dacl->aces+i)->trustee))));
 682                         continue;
 683                 }
 684
 685                 if (pparams->acedup!=e_dontcare) {
 686                         if (smbacl4_MergeIgnoreReject(pparams->acedup, theacl,
 687                                 &ace_v4, &addNewACE, i))
 688                                 return NULL;
 689                 }
 690
 691                 if (addNewACE)
 692                         smb_add_ace4(theacl, &ace_v4);
 693         }
 694
 695         return theacl;
 696 }
 697
 698 NTSTATUS smb_set_nt_acl_nfs4(files_struct *fsp,
 699         uint32 security_info_sent,
 700         const SEC_DESC *psd,
 701         set_nfs4acl_native_fn_t set_nfs4_native)
 702 {
 703         smbacl4_vfs_params params;
 704         SMB4ACL_T *theacl = NULL;
 705         bool    result;
 706
 707         SMB_STRUCT_STAT sbuf;
 708         bool set_acl_as_root = false;
 709         uid_t newUID = (uid_t)-1;
 710         gid_t newGID = (gid_t)-1;
 711         int saved_errno;
 712
 713         DEBUG(10, ("smb_set_nt_acl_nfs4 invoked for %s\n", fsp->fsp_name));
 714
 715         if ((security_info_sent & (DACL_SECURITY_INFORMATION |
 716                 GROUP_SECURITY_INFORMATION | OWNER_SECURITY_INFORMATION)) == 0)
 717         {
 718                 DEBUG(9, ("security_info_sent (0x%x) ignored\n",
 719                         security_info_sent));
 720                 return NT_STATUS_OK; /* won't show error - later to be refined... */
 721         }
 722
 723         /* Special behaviours */
 724         if (smbacl4_get_vfs_params(SMBACL4_PARAM_TYPE_NAME, fsp, &params))
 725                 return NT_STATUS_NO_MEMORY;
 726
 727         if (smbacl4_fGetFileOwner(fsp, &sbuf))
 728                 return map_nt_error_from_unix(errno);
 729
 730         if (params.do_chown) {
 731                 /* chown logic is a copy/paste from posix_acl.c:set_nt_acl */
 732                 NTSTATUS status = unpack_nt_owners(SNUM(fsp->conn), &newUID, &newGID, security_info_sent, psd);
 733                 if (!NT_STATUS_IS_OK(status)) {
 734                         DEBUG(8, ("unpack_nt_owners failed"));
 735                         return status;
 736                 }
 737                 if (((newUID != (uid_t)-1) && (sbuf.st_ex_uid != newUID)) ||
 738                     ((newGID != (gid_t)-1) && (sbuf.st_ex_gid != newGID))) {
 739                         if(try_chown(fsp->conn, fsp->fsp_name, newUID, newGID)) {
 740                                 DEBUG(3,("chown %s, %u, %u failed. Error = %s.\n",
 741                                          fsp->fsp_name, (unsigned int)newUID, (unsigned int)newGID,
 742                                          strerror(errno)));
 743                                 return map_nt_error_from_unix(errno);
 744                         }
 745
 746                         DEBUG(10,("chown %s, %u, %u succeeded.\n",
 747                                   fsp->fsp_name, (unsigned int)newUID, (unsigned int)newGID));
 748                         if (smbacl4_GetFileOwner(fsp->conn, fsp->fsp_name, &sbuf))
 749                                 return map_nt_error_from_unix(errno);
 750
 751                         /* If we successfully chowned, we know we must
 752                          * be able to set the acl, so do it as root.
 753                          */
 754                         set_acl_as_root = true;
 755                 }
 756         }
 757
 758         if (!(security_info_sent & DACL_SECURITY_INFORMATION) || psd->dacl ==NULL) {
 759                 DEBUG(10, ("no dacl found; security_info_sent = 0x%x\n", security_info_sent));
 760                 return NT_STATUS_OK;
 761         }
 762
 763         theacl = smbacl4_win2nfs4(fsp->fsp_name, psd->dacl, &params,
 764                                   sbuf.st_ex_uid, sbuf.st_ex_gid);
 765         if (!theacl)
 766                 return map_nt_error_from_unix(errno);
 767
 768         smbacl4_dump_nfs4acl(10, theacl);
 769
 770         if (set_acl_as_root) {
 771                 become_root();
 772         }
 773         result = set_nfs4_native(fsp, theacl);
 774         saved_errno = errno;
 775         if (set_acl_as_root) {
 776                 unbecome_root();
 777         }
 778         if (result!=True) {
 779                 errno = saved_errno;
 780                 DEBUG(10, ("set_nfs4_native failed with %s\n", strerror(errno)));
 781                 return map_nt_error_from_unix(errno);
 782         }
 783
 784         DEBUG(10, ("smb_set_nt_acl_nfs4 succeeded\n"));
 785         return NT_STATUS_OK;
 786 }