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 #include "librpc/gen_ndr/ndr_security.h"
  23 #include "../libcli/security/dom_sid.h"
  24 #include "../libcli/security/security.h"
  25 #include "include/dbwrap.h"
  26 #include "system/filesys.h"
  27 #include "passdb/lookup_sid.h"
  28
  29 #undef DBGC_CLASS
  30 #define DBGC_CLASS DBGC_ACLS
  31
  32 #define SMBACL4_PARAM_TYPE_NAME "nfs4"
  33
  34 extern const struct generic_mapping file_generic_mapping;
  35
  36 #define SMB_ACE4_INT_MAGIC 0x76F8A967
  37 typedef struct _SMB_ACE4_INT_T
  38 {
  39         uint32  magic;
  40         SMB_ACE4PROP_T  prop;
  41         void    *next;
  42 } SMB_ACE4_INT_T;
  43
  44 #define SMB_ACL4_INT_MAGIC 0x29A3E792
  45 typedef struct _SMB_ACL4_INT_T
  46 {
  47         uint32  magic;
  48         uint32  naces;
  49         SMB_ACE4_INT_T  *first;
  50         SMB_ACE4_INT_T  *last;
  51 } SMB_ACL4_INT_T;
  52
  53 static SMB_ACL4_INT_T *get_validated_aclint(SMB4ACL_T *theacl)
  54 {
  55         SMB_ACL4_INT_T *aclint = (SMB_ACL4_INT_T *)theacl;
  56         if (theacl==NULL)
  57         {
  58                 DEBUG(2, ("acl is NULL\n"));
  59                 errno = EINVAL;
  60                 return NULL;
  61         }
  62         if (aclint->magic!=SMB_ACL4_INT_MAGIC)
  63         {
  64                 DEBUG(2, ("aclint bad magic 0x%x\n", aclint->magic));
  65                 errno = EINVAL;
  66                 return NULL;
  67         }
  68         return aclint;
  69 }
  70
  71 static SMB_ACE4_INT_T *get_validated_aceint(SMB4ACE_T *ace)
  72 {
  73         SMB_ACE4_INT_T *aceint = (SMB_ACE4_INT_T *)ace;
  74         if (ace==NULL)
  75         {
  76                 DEBUG(2, ("ace is NULL\n"));
  77                 errno = EINVAL;
  78                 return NULL;
  79         }
  80         if (aceint->magic!=SMB_ACE4_INT_MAGIC)
  81         {
  82                 DEBUG(2, ("aceint bad magic 0x%x\n", aceint->magic));
  83                 errno = EINVAL;
  84                 return NULL;
  85         }
  86         return aceint;
  87 }
  88
  89 SMB4ACL_T *smb_create_smb4acl(void)
  90 {
  91         TALLOC_CTX *mem_ctx = talloc_tos();
  92         SMB_ACL4_INT_T  *theacl = (SMB_ACL4_INT_T *)TALLOC_ZERO_SIZE(mem_ctx, sizeof(SMB_ACL4_INT_T));
  93         if (theacl==NULL)
  94         {
  95                 DEBUG(0, ("TALLOC_SIZE failed\n"));
  96                 errno = ENOMEM;
  97                 return NULL;
  98         }
  99         theacl->magic = SMB_ACL4_INT_MAGIC;
 100         /* theacl->first, last = NULL not needed */
 101         return (SMB4ACL_T *)theacl;
 102 }
 103
 104 SMB4ACE_T *smb_add_ace4(SMB4ACL_T *theacl, SMB_ACE4PROP_T *prop)
 105 {
 106         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 107         TALLOC_CTX *mem_ctx = talloc_tos();
 108         SMB_ACE4_INT_T *ace;
 109
 110         ace = (SMB_ACE4_INT_T *)TALLOC_ZERO_SIZE(mem_ctx, sizeof(SMB_ACE4_INT_T));
 111         if (ace==NULL)
 112         {
 113                 DEBUG(0, ("TALLOC_SIZE failed\n"));
 114                 errno = ENOMEM;
 115                 return NULL;
 116         }
 117         ace->magic = SMB_ACE4_INT_MAGIC;
 118         /* ace->next = NULL not needed */
 119         memcpy(&ace->prop, prop, sizeof(SMB_ACE4PROP_T));
 120
 121         if (aclint->first==NULL)
 122         {
 123                 aclint->first = ace;
 124                 aclint->last = ace;
 125         } else {
 126                 aclint->last->next = (void *)ace;
 127                 aclint->last = ace;
 128         }
 129         aclint->naces++;
 130
 131         return (SMB4ACE_T *)ace;
 132 }
 133
 134 SMB_ACE4PROP_T *smb_get_ace4(SMB4ACE_T *ace)
 135 {
 136         SMB_ACE4_INT_T *aceint = get_validated_aceint(ace);
 137         if (aceint==NULL)
 138                 return NULL;
 139
 140         return &aceint->prop;
 141 }
 142
 143 SMB4ACE_T *smb_next_ace4(SMB4ACE_T *ace)
 144 {
 145         SMB_ACE4_INT_T *aceint = get_validated_aceint(ace);
 146         if (aceint==NULL)
 147                 return NULL;
 148
 149         return (SMB4ACE_T *)aceint->next;
 150 }
 151
 152 SMB4ACE_T *smb_first_ace4(SMB4ACL_T *theacl)
 153 {
 154         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 155         if (aclint==NULL)
 156                 return NULL;
 157
 158         return (SMB4ACE_T *)aclint->first;
 159 }
 160
 161 uint32 smb_get_naces(SMB4ACL_T *theacl)
 162 {
 163         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 164         if (aclint==NULL)
 165                 return 0;
 166
 167         return aclint->naces;
 168 }
 169
 170 static int smbacl4_GetFileOwner(struct connection_struct *conn,
 171                                 const char *filename,
 172                                 SMB_STRUCT_STAT *psbuf)
 173 {
 174         memset(psbuf, 0, sizeof(SMB_STRUCT_STAT));
 175
 176         /* Get the stat struct for the owner info. */
 177         if (vfs_stat_smb_fname(conn, filename, psbuf) != 0)
 178         {
 179                 DEBUG(8, ("vfs_stat_smb_fname failed with error %s\n",
 180                         strerror(errno)));
 181                 return -1;
 182         }
 183
 184         return 0;
 185 }
 186
 187 static int smbacl4_fGetFileOwner(files_struct *fsp, SMB_STRUCT_STAT *psbuf)
 188 {
 189         memset(psbuf, 0, sizeof(SMB_STRUCT_STAT));
 190
 191         if (fsp->fh->fd == -1) {
 192                 return smbacl4_GetFileOwner(fsp->conn,
 193                                             fsp->fsp_name->base_name, psbuf);
 194         }
 195         if (SMB_VFS_FSTAT(fsp, psbuf) != 0)
 196         {
 197                 DEBUG(8, ("SMB_VFS_FSTAT failed with error %s\n",
 198                         strerror(errno)));
 199                 return -1;
 200         }
 201
 202         return 0;
 203 }
 204
 205 static bool smbacl4_nfs42win(TALLOC_CTX *mem_ctx, SMB4ACL_T *theacl, /* in */
 206         struct dom_sid *psid_owner, /* in */
 207         struct dom_sid *psid_group, /* in */
 208         bool is_directory, /* in */
 209         struct security_ace **ppnt_ace_list, /* out */
 210         int *pgood_aces /* out */
 211 )
 212 {
 213         SMB_ACL4_INT_T *aclint = (SMB_ACL4_INT_T *)theacl;
 214         SMB_ACE4_INT_T *aceint;
 215         struct security_ace *nt_ace_list = NULL;
 216         int good_aces = 0;
 217
 218         DEBUG(10, ("smbacl_nfs42win entered\n"));
 219
 220         aclint = get_validated_aclint(theacl);
 221         /* We do not check for naces being 0 or theacl being NULL here because it is done upstream */
 222         /* in smb_get_nt_acl_nfs4(). */
 223         nt_ace_list = (struct security_ace *)TALLOC_ZERO_SIZE(mem_ctx, aclint->naces * sizeof(struct security_ace));
 224         if (nt_ace_list==NULL)
 225         {
 226                 DEBUG(10, ("talloc error"));
 227                 errno = ENOMEM;
 228                 return False;
 229         }
 230
 231         for (aceint=aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
 232                 uint32_t mask;
 233                 struct dom_sid sid;
 234                 SMB_ACE4PROP_T  *ace = &aceint->prop;
 235                 uint32_t mapped_ace_flags;
 236
 237                 DEBUG(10, ("magic: 0x%x, type: %d, iflags: %x, flags: %x, mask: %x, "
 238                         "who: %d\n", aceint->magic, ace->aceType, ace->flags,
 239                         ace->aceFlags, ace->aceMask, ace->who.id));
 240
 241                 SMB_ASSERT(aceint->magic==SMB_ACE4_INT_MAGIC);
 242
 243                 if (ace->flags & SMB_ACE4_ID_SPECIAL) {
 244                         switch (ace->who.special_id) {
 245                         case SMB_ACE4_WHO_OWNER:
 246                                 sid_copy(&sid, psid_owner);
 247                                 break;
 248                         case SMB_ACE4_WHO_GROUP:
 249                                 sid_copy(&sid, psid_group);
 250                                 break;
 251                         case SMB_ACE4_WHO_EVERYONE:
 252                                 sid_copy(&sid, &global_sid_World);
 253                                 break;
 254                         default:
 255                                 DEBUG(8, ("invalid special who id %d "
 256                                         "ignored\n", ace->who.special_id));
 257                         }
 258                 } else {
 259                         if (ace->aceFlags & SMB_ACE4_IDENTIFIER_GROUP) {
 260                                 gid_to_sid(&sid, ace->who.gid);
 261                         } else {
 262                                 uid_to_sid(&sid, ace->who.uid);
 263                         }
 264                 }
 265                 DEBUG(10, ("mapped %d to %s\n", ace->who.id,
 266                            sid_string_dbg(&sid)));
 267
 268                 if (is_directory && (ace->aceMask & SMB_ACE4_ADD_FILE)) {
 269                         ace->aceMask |= SMB_ACE4_DELETE_CHILD;
 270                 }
 271
 272                 mapped_ace_flags = ace->aceFlags & 0xf;
 273                 if (!is_directory && (mapped_ace_flags & (SMB_ACE4_FILE_INHERIT_ACE|SMB_ACE4_DIRECTORY_INHERIT_ACE))) {
 274                         /*
 275                          * GPFS sets inherits dir_inhert and file_inherit flags
 276                          * to files, too, which confuses windows, and seems to
 277                          * be wrong anyways. ==> Map these bits away for files.
 278                          */
 279                         DEBUG(10, ("removing inherit flags from nfs4 ace\n"));
 280                         mapped_ace_flags &= ~(SMB_ACE4_FILE_INHERIT_ACE|SMB_ACE4_DIRECTORY_INHERIT_ACE);
 281                 }
 282                 DEBUG(10, ("mapped ace flags: 0x%x => 0x%x\n",
 283                       ace->aceFlags, mapped_ace_flags));
 284
 285                 /* Windows clients expect SYNC on acls to
 286                    correctly allow rename. See bug #7909. */
 287                 mask = ace->aceMask | SMB_ACE4_SYNCHRONIZE;
 288                 init_sec_ace(&nt_ace_list[good_aces++], &sid,
 289                         ace->aceType, mask,
 290                         mapped_ace_flags);
 291         }
 292
 293         *ppnt_ace_list = nt_ace_list;
 294         *pgood_aces = good_aces;
 295
 296         return True;
 297 }
 298
 299 static NTSTATUS smb_get_nt_acl_nfs4_common(const SMB_STRUCT_STAT *sbuf,
 300         uint32 security_info,
 301         struct security_descriptor **ppdesc, SMB4ACL_T *theacl)
 302 {
 303         int     good_aces = 0;
 304         struct dom_sid sid_owner, sid_group;
 305         size_t sd_size = 0;
 306         struct security_ace *nt_ace_list = NULL;
 307         struct security_acl *psa = NULL;
 308         TALLOC_CTX *mem_ctx = talloc_tos();
 309
 310         if (theacl==NULL || smb_get_naces(theacl)==0)
 311                 return NT_STATUS_ACCESS_DENIED; /* special because we
 312                                                  * shouldn't alloc 0 for
 313                                                  * win */
 314
 315         uid_to_sid(&sid_owner, sbuf->st_ex_uid);
 316         gid_to_sid(&sid_group, sbuf->st_ex_gid);
 317
 318         if (smbacl4_nfs42win(mem_ctx, theacl, &sid_owner, &sid_group,
 319                              S_ISDIR(sbuf->st_ex_mode),
 320                                 &nt_ace_list, &good_aces)==False) {
 321                 DEBUG(8,("smbacl4_nfs42win failed\n"));
 322                 return map_nt_error_from_unix(errno);
 323         }
 324
 325         psa = make_sec_acl(mem_ctx, NT4_ACL_REVISION, good_aces, nt_ace_list);
 326         if (psa == NULL) {
 327                 DEBUG(2,("make_sec_acl failed\n"));
 328                 return NT_STATUS_NO_MEMORY;
 329         }
 330
 331         DEBUG(10,("after make sec_acl\n"));
 332         *ppdesc = make_sec_desc(mem_ctx, SD_REVISION, SEC_DESC_SELF_RELATIVE,
 333                                 (security_info & SECINFO_OWNER) ? &sid_owner : NULL,
 334                                 (security_info & SECINFO_GROUP) ? &sid_group : NULL,
 335                                 NULL, psa, &sd_size);
 336         if (*ppdesc==NULL) {
 337                 DEBUG(2,("make_sec_desc failed\n"));
 338                 return NT_STATUS_NO_MEMORY;
 339         }
 340
 341         DEBUG(10, ("smb_get_nt_acl_nfs4_common successfully exited with sd_size %d\n",
 342                    (int)ndr_size_security_descriptor(*ppdesc, 0)));
 343
 344         return NT_STATUS_OK;
 345 }
 346
 347 NTSTATUS smb_fget_nt_acl_nfs4(files_struct *fsp,
 348                                uint32 security_info,
 349                                struct security_descriptor **ppdesc, SMB4ACL_T *theacl)
 350 {
 351         SMB_STRUCT_STAT sbuf;
 352
 353         DEBUG(10, ("smb_fget_nt_acl_nfs4 invoked for %s\n", fsp_str_dbg(fsp)));
 354
 355         if (smbacl4_fGetFileOwner(fsp, &sbuf)) {
 356                 return map_nt_error_from_unix(errno);
 357         }
 358
 359         return smb_get_nt_acl_nfs4_common(&sbuf, security_info, ppdesc, theacl);
 360 }
 361
 362 NTSTATUS smb_get_nt_acl_nfs4(struct connection_struct *conn,
 363                               const char *name,
 364                               uint32 security_info,
 365                               struct security_descriptor **ppdesc, SMB4ACL_T *theacl)
 366 {
 367         SMB_STRUCT_STAT sbuf;
 368
 369         DEBUG(10, ("smb_get_nt_acl_nfs4 invoked for %s\n", name));
 370
 371         if (smbacl4_GetFileOwner(conn, name, &sbuf)) {
 372                 return map_nt_error_from_unix(errno);
 373         }
 374
 375         return smb_get_nt_acl_nfs4_common(&sbuf, security_info, ppdesc, theacl);
 376 }
 377
 378 enum smbacl4_mode_enum {e_simple=0, e_special=1};
 379 enum smbacl4_acedup_enum {e_dontcare=0, e_reject=1, e_ignore=2, e_merge=3};
 380
 381 typedef struct _smbacl4_vfs_params {
 382         enum smbacl4_mode_enum mode;
 383         bool do_chown;
 384         enum smbacl4_acedup_enum acedup;
 385         struct db_context *sid_mapping_table;
 386 } smbacl4_vfs_params;
 387
 388 /*
 389  * Gather special parameters for NFS4 ACL handling
 390  */
 391 static int smbacl4_get_vfs_params(
 392         const char *type_name,
 393         files_struct *fsp,
 394         smbacl4_vfs_params *params
 395 )
 396 {
 397         static const struct enum_list enum_smbacl4_modes[] = {
 398                 { e_simple, "simple" },
 399                 { e_special, "special" }
 400         };
 401         static const struct enum_list enum_smbacl4_acedups[] = {
 402                 { e_dontcare, "dontcare" },
 403                 { e_reject, "reject" },
 404                 { e_ignore, "ignore" },
 405                 { e_merge, "merge" },
 406         };
 407
 408         memset(params, 0, sizeof(smbacl4_vfs_params));
 409         params->mode = (enum smbacl4_mode_enum)lp_parm_enum(
 410                 SNUM(fsp->conn), type_name,
 411                 "mode", enum_smbacl4_modes, e_simple);
 412         params->do_chown = lp_parm_bool(SNUM(fsp->conn), type_name,
 413                 "chown", True);
 414         params->acedup = (enum smbacl4_acedup_enum)lp_parm_enum(
 415                 SNUM(fsp->conn), type_name,
 416                 "acedup", enum_smbacl4_acedups, e_dontcare);
 417
 418         DEBUG(10, ("mode:%s, do_chown:%s, acedup: %s\n",
 419                 enum_smbacl4_modes[params->mode].name,
 420                 params->do_chown ? "true" : "false",
 421                 enum_smbacl4_acedups[params->acedup].name));
 422
 423         return 0;
 424 }
 425
 426 static void smbacl4_dump_nfs4acl(int level, SMB4ACL_T *theacl)
 427 {
 428         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 429         SMB_ACE4_INT_T *aceint;
 430
 431         DEBUG(level, ("NFS4ACL: size=%d\n", aclint->naces));
 432
 433         for(aceint = aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
 434                 SMB_ACE4PROP_T *ace = &aceint->prop;
 435
 436                 DEBUG(level, ("\tACE: type=%d, flags=0x%x, fflags=0x%x, mask=0x%x, id=%d\n",
 437                         ace->aceType,
 438                         ace->aceFlags, ace->flags,
 439                         ace->aceMask,
 440                         ace->who.id));
 441         }
 442 }
 443
 444 /*
 445  * Find 2 NFS4 who-special ACE property (non-copy!!!)
 446  * match nonzero if "special" and who is equal
 447  * return ace if found matching; otherwise NULL
 448  */
 449 static SMB_ACE4PROP_T *smbacl4_find_equal_special(
 450         SMB4ACL_T *theacl,
 451         SMB_ACE4PROP_T *aceNew)
 452 {
 453         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 454         SMB_ACE4_INT_T *aceint;
 455
 456         for(aceint = aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
 457                 SMB_ACE4PROP_T *ace = &aceint->prop;
 458
 459                 DEBUG(10,("ace type:0x%x flags:0x%x aceFlags:0x%x "
 460                           "new type:0x%x flags:0x%x aceFlags:0x%x\n",
 461                           ace->aceType, ace->flags, ace->aceFlags,
 462                           aceNew->aceType, aceNew->flags,aceNew->aceFlags));
 463
 464                 if (ace->flags == aceNew->flags &&
 465                         ace->aceType==aceNew->aceType &&
 466                         ((ace->aceFlags&SMB_ACE4_INHERIT_ONLY_ACE)==
 467                          (aceNew->aceFlags&SMB_ACE4_INHERIT_ONLY_ACE)) &&
 468                         (ace->aceFlags&SMB_ACE4_IDENTIFIER_GROUP)==
 469                         (aceNew->aceFlags&SMB_ACE4_IDENTIFIER_GROUP)
 470                 ) {
 471                         /* keep type safety; e.g. gid is an u.short */
 472                         if (ace->flags & SMB_ACE4_ID_SPECIAL)
 473                         {
 474                                 if (ace->who.special_id==aceNew->who.special_id)
 475                                         return ace;
 476                         } else {
 477                                 if (ace->aceFlags & SMB_ACE4_IDENTIFIER_GROUP)
 478                                 {
 479                                         if (ace->who.gid==aceNew->who.gid)
 480                                                 return ace;
 481                                 } else {
 482                                         if (ace->who.uid==aceNew->who.uid)
 483                                                 return ace;
 484                                 }
 485                         }
 486                 }
 487         }
 488
 489         return NULL;
 490 }
 491
 492 static bool nfs4_map_sid(smbacl4_vfs_params *params, const struct dom_sid *src,
 493                          struct dom_sid *dst)
 494 {
 495         static struct db_context *mapping_db = NULL;
 496         TDB_DATA data;
 497
 498         if (mapping_db == NULL) {
 499                 const char *dbname = lp_parm_const_string(
 500                         -1, SMBACL4_PARAM_TYPE_NAME, "sidmap", NULL);
 501
 502                 if (dbname == NULL) {
 503                         DEBUG(10, ("%s:sidmap not defined\n",
 504                                    SMBACL4_PARAM_TYPE_NAME));
 505                         return False;
 506                 }
 507
 508                 become_root();
 509                 mapping_db = db_open(NULL, dbname, 0, TDB_DEFAULT,
 510                                      O_RDONLY, 0600);
 511                 unbecome_root();
 512
 513                 if (mapping_db == NULL) {
 514                         DEBUG(1, ("could not open sidmap: %s\n",
 515                                   strerror(errno)));
 516                         return False;
 517                 }
 518         }
 519
 520         if (mapping_db->fetch(mapping_db, NULL,
 521                               string_term_tdb_data(sid_string_tos(src)),
 522                               &data) == -1) {
 523                 DEBUG(10, ("could not find mapping for SID %s\n",
 524                            sid_string_dbg(src)));
 525                 return False;
 526         }
 527
 528         if ((data.dptr == NULL) || (data.dsize <= 0)
 529             || (data.dptr[data.dsize-1] != '\0')) {
 530                 DEBUG(5, ("invalid mapping for SID %s\n",
 531                           sid_string_dbg(src)));
 532                 TALLOC_FREE(data.dptr);
 533                 return False;
 534         }
 535
 536         if (!string_to_sid(dst, (char *)data.dptr)) {
 537                 DEBUG(1, ("invalid mapping %s for SID %s\n",
 538                           (char *)data.dptr, sid_string_dbg(src)));
 539                 TALLOC_FREE(data.dptr);
 540                 return False;
 541         }
 542
 543         TALLOC_FREE(data.dptr);
 544
 545         return True;
 546 }
 547
 548 static bool smbacl4_fill_ace4(
 549         TALLOC_CTX *mem_ctx,
 550         const char *filename,
 551         smbacl4_vfs_params *params,
 552         uid_t ownerUID,
 553         gid_t ownerGID,
 554         const struct security_ace *ace_nt, /* input */
 555         SMB_ACE4PROP_T *ace_v4 /* output */
 556 )
 557 {
 558         DEBUG(10, ("got ace for %s\n", sid_string_dbg(&ace_nt->trustee)));
 559
 560         memset(ace_v4, 0, sizeof(SMB_ACE4PROP_T));
 561         ace_v4->aceType = ace_nt->type; /* only ACCESS|DENY supported right now */
 562         ace_v4->aceFlags = ace_nt->flags & SEC_ACE_FLAG_VALID_INHERIT;
 563         ace_v4->aceMask = ace_nt->access_mask &
 564                 (SEC_STD_ALL | SEC_FILE_ALL);
 565
 566         se_map_generic(&ace_v4->aceMask, &file_generic_mapping);
 567
 568         if (ace_v4->aceFlags!=ace_nt->flags)
 569                 DEBUG(9, ("ace_v4->aceFlags(0x%x)!=ace_nt->flags(0x%x)\n",
 570                         ace_v4->aceFlags, ace_nt->flags));
 571
 572         if (ace_v4->aceMask!=ace_nt->access_mask)
 573                 DEBUG(9, ("ace_v4->aceMask(0x%x)!=ace_nt->access_mask(0x%x)\n",
 574                         ace_v4->aceMask, ace_nt->access_mask));
 575
 576         if (dom_sid_equal(&ace_nt->trustee, &global_sid_World)) {
 577                 ace_v4->who.special_id = SMB_ACE4_WHO_EVERYONE;
 578                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
 579         } else {
 580                 const char *dom, *name;
 581                 enum lsa_SidType type;
 582                 uid_t uid;
 583                 gid_t gid;
 584                 struct dom_sid sid;
 585
 586                 sid_copy(&sid, &ace_nt->trustee);
 587
 588                 if (!lookup_sid(mem_ctx, &sid, &dom, &name, &type)) {
 589
 590                         struct dom_sid mapped;
 591
 592                         if (!nfs4_map_sid(params, &sid, &mapped)) {
 593                                 DEBUG(1, ("nfs4_acls.c: file [%s]: SID %s "
 594                                           "unknown\n", filename, sid_string_dbg(&sid)));
 595                                 errno = EINVAL;
 596                                 return False;
 597                         }
 598
 599                         DEBUG(2, ("nfs4_acls.c: file [%s]: mapped SID %s "
 600                                   "to %s\n", filename, sid_string_dbg(&sid), sid_string_dbg(&mapped)));
 601
 602                         if (!lookup_sid(mem_ctx, &mapped, &dom,
 603                                         &name, &type)) {
 604                                 DEBUG(1, ("nfs4_acls.c: file [%s]: SID %s "
 605                                           "mapped from %s is unknown\n",
 606                                           filename, sid_string_dbg(&mapped), sid_string_dbg(&sid)));
 607                                 errno = EINVAL;
 608                                 return False;
 609                         }
 610
 611                         sid_copy(&sid, &mapped);
 612                 }
 613
 614                 if (type == SID_NAME_USER) {
 615                         if (!sid_to_uid(&sid, &uid)) {
 616                                 DEBUG(1, ("nfs4_acls.c: file [%s]: could not "
 617                                           "convert %s to uid\n", filename,
 618                                           sid_string_dbg(&sid)));
 619                                 return False;
 620                         }
 621
 622                         if (params->mode==e_special && uid==ownerUID) {
 623                                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
 624                                 ace_v4->who.special_id = SMB_ACE4_WHO_OWNER;
 625                         } else {
 626                                 ace_v4->who.uid = uid;
 627                         }
 628                 } else { /* else group? - TODO check it... */
 629                         if (!sid_to_gid(&sid, &gid)) {
 630                                 DEBUG(1, ("nfs4_acls.c: file [%s]: could not "
 631                                           "convert %s to gid\n", filename,
 632                                           sid_string_dbg(&sid)));
 633                                 return False;
 634                         }
 635
 636                         ace_v4->aceFlags |= SMB_ACE4_IDENTIFIER_GROUP;
 637
 638                         if (params->mode==e_special && gid==ownerGID) {
 639                                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
 640                                 ace_v4->who.special_id = SMB_ACE4_WHO_GROUP;
 641                         } else {
 642                                 ace_v4->who.gid = gid;
 643                         }
 644                 }
 645         }
 646
 647         return True; /* OK */
 648 }
 649
 650 static int smbacl4_MergeIgnoreReject(
 651         enum smbacl4_acedup_enum acedup,
 652         SMB4ACL_T *theacl, /* may modify it */
 653         SMB_ACE4PROP_T *ace, /* the "new" ACE */
 654         bool    *paddNewACE,
 655         int     i
 656 )
 657 {
 658         int     result = 0;
 659         SMB_ACE4PROP_T *ace4found = smbacl4_find_equal_special(theacl, ace);
 660         if (ace4found)
 661         {
 662                 switch(acedup)
 663                 {
 664                 case e_merge: /* "merge" flags */
 665                         *paddNewACE = False;
 666                         ace4found->aceFlags |= ace->aceFlags;
 667                         ace4found->aceMask |= ace->aceMask;
 668                         break;
 669                 case e_ignore: /* leave out this record */
 670                         *paddNewACE = False;
 671                         break;
 672                 case e_reject: /* do an error */
 673                         DEBUG(8, ("ACL rejected by duplicate nt ace#%d\n", i));
 674                         errno = EINVAL; /* SHOULD be set on any _real_ error */
 675                         result = -1;
 676                         break;
 677                 default:
 678                         break;
 679                 }
 680         }
 681         return result;
 682 }
 683
 684 static SMB4ACL_T *smbacl4_win2nfs4(
 685         const char *filename,
 686         const struct security_acl *dacl,
 687         smbacl4_vfs_params *pparams,
 688         uid_t ownerUID,
 689         gid_t ownerGID
 690 )
 691 {
 692         SMB4ACL_T *theacl;
 693         uint32  i;
 694         TALLOC_CTX *mem_ctx = talloc_tos();
 695
 696         DEBUG(10, ("smbacl4_win2nfs4 invoked\n"));
 697
 698         theacl = smb_create_smb4acl();
 699         if (theacl==NULL)
 700                 return NULL;
 701
 702         for(i=0; i<dacl->num_aces; i++) {
 703                 SMB_ACE4PROP_T  ace_v4;
 704                 bool    addNewACE = True;
 705
 706                 if (!smbacl4_fill_ace4(mem_ctx, filename, pparams,
 707                                        ownerUID, ownerGID,
 708                                        dacl->aces + i, &ace_v4)) {
 709                         DEBUG(3, ("Could not fill ace for file %s, SID %s\n",
 710                                   filename,
 711                                   sid_string_dbg(&((dacl->aces+i)->trustee))));
 712                         continue;
 713                 }
 714
 715                 if (pparams->acedup!=e_dontcare) {
 716                         if (smbacl4_MergeIgnoreReject(pparams->acedup, theacl,
 717                                 &ace_v4, &addNewACE, i))
 718                                 return NULL;
 719                 }
 720
 721                 if (addNewACE)
 722                         smb_add_ace4(theacl, &ace_v4);
 723         }
 724
 725         return theacl;
 726 }
 727
 728 NTSTATUS smb_set_nt_acl_nfs4(files_struct *fsp,
 729         uint32 security_info_sent,
 730         const struct security_descriptor *psd,
 731         set_nfs4acl_native_fn_t set_nfs4_native)
 732 {
 733         smbacl4_vfs_params params;
 734         SMB4ACL_T *theacl = NULL;
 735         bool    result;
 736
 737         SMB_STRUCT_STAT sbuf;
 738         bool set_acl_as_root = false;
 739         uid_t newUID = (uid_t)-1;
 740         gid_t newGID = (gid_t)-1;
 741         int saved_errno;
 742
 743         DEBUG(10, ("smb_set_nt_acl_nfs4 invoked for %s\n", fsp_str_dbg(fsp)));
 744
 745         if ((security_info_sent & (SECINFO_DACL |
 746                 SECINFO_GROUP | SECINFO_OWNER)) == 0)
 747         {
 748                 DEBUG(9, ("security_info_sent (0x%x) ignored\n",
 749                         security_info_sent));
 750                 return NT_STATUS_OK; /* won't show error - later to be refined... */
 751         }
 752
 753         /* Special behaviours */
 754         if (smbacl4_get_vfs_params(SMBACL4_PARAM_TYPE_NAME, fsp, &params))
 755                 return NT_STATUS_NO_MEMORY;
 756
 757         if (smbacl4_fGetFileOwner(fsp, &sbuf))
 758                 return map_nt_error_from_unix(errno);
 759
 760         if (params.do_chown) {
 761                 /* chown logic is a copy/paste from posix_acl.c:set_nt_acl */
 762                 NTSTATUS status = unpack_nt_owners(fsp->conn, &newUID, &newGID, security_info_sent, psd);
 763                 if (!NT_STATUS_IS_OK(status)) {
 764                         DEBUG(8, ("unpack_nt_owners failed"));
 765                         return status;
 766                 }
 767                 if (((newUID != (uid_t)-1) && (sbuf.st_ex_uid != newUID)) ||
 768                     ((newGID != (gid_t)-1) && (sbuf.st_ex_gid != newGID))) {
 769
 770                         status = try_chown(fsp, newUID, newGID);
 771                         if (!NT_STATUS_IS_OK(status)) {
 772                                 DEBUG(3,("chown %s, %u, %u failed. Error = "
 773                                          "%s.\n", fsp_str_dbg(fsp),
 774                                          (unsigned int)newUID,
 775                                          (unsigned int)newGID,
 776                                          nt_errstr(status)));
 777                                 return status;
 778                         }
 779
 780                         DEBUG(10,("chown %s, %u, %u succeeded.\n",
 781                                   fsp_str_dbg(fsp), (unsigned int)newUID,
 782                                   (unsigned int)newGID));
 783                         if (smbacl4_GetFileOwner(fsp->conn,
 784                                                  fsp->fsp_name->base_name,
 785                                                  &sbuf))
 786                                 return map_nt_error_from_unix(errno);
 787
 788                         /* If we successfully chowned, we know we must
 789                          * be able to set the acl, so do it as root.
 790                          */
 791                         set_acl_as_root = true;
 792                 }
 793         }
 794
 795         if (!(security_info_sent & SECINFO_DACL) || psd->dacl ==NULL) {
 796                 DEBUG(10, ("no dacl found; security_info_sent = 0x%x\n", security_info_sent));
 797                 return NT_STATUS_OK;
 798         }
 799
 800         theacl = smbacl4_win2nfs4(fsp->fsp_name->base_name, psd->dacl, &params,
 801                                   sbuf.st_ex_uid, sbuf.st_ex_gid);
 802         if (!theacl)
 803                 return map_nt_error_from_unix(errno);
 804
 805         smbacl4_dump_nfs4acl(10, theacl);
 806
 807         if (set_acl_as_root) {
 808                 become_root();
 809         }
 810         result = set_nfs4_native(fsp, theacl);
 811         saved_errno = errno;
 812         if (set_acl_as_root) {
 813                 unbecome_root();
 814         }
 815         if (result!=True) {
 816                 errno = saved_errno;
 817                 DEBUG(10, ("set_nfs4_native failed with %s\n", strerror(errno)));
 818                 return map_nt_error_from_unix(errno);
 819         }
 820
 821         DEBUG(10, ("smb_set_nt_acl_nfs4 succeeded\n"));
 822         return NT_STATUS_OK;
 823 }