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,
 187                                             fsp->fsp_name->base_name, psbuf);
 188         }
 189         if (SMB_VFS_FSTAT(fsp, psbuf) != 0)
 190         {
 191                 DEBUG(8, ("SMB_VFS_FSTAT failed with error %s\n",
 192                         strerror(errno)));
 193                 return -1;
 194         }
 195
 196         return 0;
 197 }
 198
 199 static bool smbacl4_nfs42win(TALLOC_CTX *mem_ctx, SMB4ACL_T *theacl, /* in */
 200         DOM_SID *psid_owner, /* in */
 201         DOM_SID *psid_group, /* in */
 202         bool is_directory, /* in */
 203         SEC_ACE **ppnt_ace_list, /* out */
 204         int *pgood_aces /* out */
 205 )
 206 {
 207         SMB_ACL4_INT_T *aclint = (SMB_ACL4_INT_T *)theacl;
 208         SMB_ACE4_INT_T *aceint;
 209         SEC_ACE *nt_ace_list = NULL;
 210         int good_aces = 0;
 211
 212         DEBUG(10, ("smbacl_nfs42win entered\n"));
 213
 214         aclint = get_validated_aclint(theacl);
 215         /* We do not check for naces being 0 or theacl being NULL here because it is done upstream */
 216         /* in smb_get_nt_acl_nfs4(). */
 217         nt_ace_list = (SEC_ACE *)TALLOC_ZERO_SIZE(mem_ctx, aclint->naces * sizeof(SEC_ACE));
 218         if (nt_ace_list==NULL)
 219         {
 220                 DEBUG(10, ("talloc error"));
 221                 errno = ENOMEM;
 222                 return False;
 223         }
 224
 225         for (aceint=aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
 226                 uint32_t mask;
 227                 DOM_SID sid;
 228                 SMB_ACE4PROP_T  *ace = &aceint->prop;
 229
 230                 DEBUG(10, ("magic: 0x%x, type: %d, iflags: %x, flags: %x, mask: %x, "
 231                         "who: %d\n", aceint->magic, ace->aceType, ace->flags,
 232                         ace->aceFlags, ace->aceMask, ace->who.id));
 233
 234                 SMB_ASSERT(aceint->magic==SMB_ACE4_INT_MAGIC);
 235
 236                 if (ace->flags & SMB_ACE4_ID_SPECIAL) {
 237                         switch (ace->who.special_id) {
 238                         case SMB_ACE4_WHO_OWNER:
 239                                 sid_copy(&sid, psid_owner);
 240                                 break;
 241                         case SMB_ACE4_WHO_GROUP:
 242                                 sid_copy(&sid, psid_group);
 243                                 break;
 244                         case SMB_ACE4_WHO_EVERYONE:
 245                                 sid_copy(&sid, &global_sid_World);
 246                                 break;
 247                         default:
 248                                 DEBUG(8, ("invalid special who id %d "
 249                                         "ignored\n", ace->who.special_id));
 250                         }
 251                 } else {
 252                         if (ace->aceFlags & SMB_ACE4_IDENTIFIER_GROUP) {
 253                                 gid_to_sid(&sid, ace->who.gid);
 254                         } else {
 255                                 uid_to_sid(&sid, ace->who.uid);
 256                         }
 257                 }
 258                 DEBUG(10, ("mapped %d to %s\n", ace->who.id,
 259                            sid_string_dbg(&sid)));
 260
 261                 if (is_directory && (ace->aceMask & SMB_ACE4_ADD_FILE)) {
 262                         ace->aceMask |= SMB_ACE4_DELETE_CHILD;
 263                 }
 264
 265                 mask = ace->aceMask;
 266                 init_sec_ace(&nt_ace_list[good_aces++], &sid,
 267                         ace->aceType, mask,
 268                         ace->aceFlags & 0xf);
 269         }
 270
 271         *ppnt_ace_list = nt_ace_list;
 272         *pgood_aces = good_aces;
 273
 274         return True;
 275 }
 276
 277 static NTSTATUS smb_get_nt_acl_nfs4_common(const SMB_STRUCT_STAT *sbuf,
 278         uint32 security_info,
 279         SEC_DESC **ppdesc, SMB4ACL_T *theacl)
 280 {
 281         int     good_aces = 0;
 282         DOM_SID sid_owner, sid_group;
 283         size_t sd_size = 0;
 284         SEC_ACE *nt_ace_list = NULL;
 285         SEC_ACL *psa = NULL;
 286         TALLOC_CTX *mem_ctx = talloc_tos();
 287
 288         if (theacl==NULL || smb_get_naces(theacl)==0)
 289                 return NT_STATUS_ACCESS_DENIED; /* special because we
 290                                                  * shouldn't alloc 0 for
 291                                                  * win */
 292
 293         uid_to_sid(&sid_owner, sbuf->st_ex_uid);
 294         gid_to_sid(&sid_group, sbuf->st_ex_gid);
 295
 296         if (smbacl4_nfs42win(mem_ctx, theacl, &sid_owner, &sid_group,
 297                              S_ISDIR(sbuf->st_ex_mode),
 298                                 &nt_ace_list, &good_aces)==False) {
 299                 DEBUG(8,("smbacl4_nfs42win failed\n"));
 300                 return map_nt_error_from_unix(errno);
 301         }
 302
 303         psa = make_sec_acl(mem_ctx, NT4_ACL_REVISION, good_aces, nt_ace_list);
 304         if (psa == NULL) {
 305                 DEBUG(2,("make_sec_acl failed\n"));
 306                 return NT_STATUS_NO_MEMORY;
 307         }
 308
 309         DEBUG(10,("after make sec_acl\n"));
 310         *ppdesc = make_sec_desc(mem_ctx, SEC_DESC_REVISION, SEC_DESC_SELF_RELATIVE,
 311                                 (security_info & OWNER_SECURITY_INFORMATION) ? &sid_owner : NULL,
 312                                 (security_info & GROUP_SECURITY_INFORMATION) ? &sid_group : NULL,
 313                                 NULL, psa, &sd_size);
 314         if (*ppdesc==NULL) {
 315                 DEBUG(2,("make_sec_desc failed\n"));
 316                 return NT_STATUS_NO_MEMORY;
 317         }
 318
 319         DEBUG(10, ("smb_get_nt_acl_nfs4_common successfully exited with sd_size %d\n",
 320                    (int)ndr_size_security_descriptor(*ppdesc, NULL, 0)));
 321
 322         return NT_STATUS_OK;
 323 }
 324
 325 NTSTATUS smb_fget_nt_acl_nfs4(files_struct *fsp,
 326                                uint32 security_info,
 327                                SEC_DESC **ppdesc, SMB4ACL_T *theacl)
 328 {
 329         SMB_STRUCT_STAT sbuf;
 330
 331         DEBUG(10, ("smb_fget_nt_acl_nfs4 invoked for %s\n", fsp_str_dbg(fsp)));
 332
 333         if (smbacl4_fGetFileOwner(fsp, &sbuf)) {
 334                 return map_nt_error_from_unix(errno);
 335         }
 336
 337         return smb_get_nt_acl_nfs4_common(&sbuf, security_info, ppdesc, theacl);
 338 }
 339
 340 NTSTATUS smb_get_nt_acl_nfs4(struct connection_struct *conn,
 341                               const char *name,
 342                               uint32 security_info,
 343                               SEC_DESC **ppdesc, SMB4ACL_T *theacl)
 344 {
 345         SMB_STRUCT_STAT sbuf;
 346
 347         DEBUG(10, ("smb_get_nt_acl_nfs4 invoked for %s\n", name));
 348
 349         if (smbacl4_GetFileOwner(conn, name, &sbuf)) {
 350                 return map_nt_error_from_unix(errno);
 351         }
 352
 353         return smb_get_nt_acl_nfs4_common(&sbuf, security_info, ppdesc, theacl);
 354 }
 355
 356 enum smbacl4_mode_enum {e_simple=0, e_special=1};
 357 enum smbacl4_acedup_enum {e_dontcare=0, e_reject=1, e_ignore=2, e_merge=3};
 358
 359 typedef struct _smbacl4_vfs_params {
 360         enum smbacl4_mode_enum mode;
 361         bool do_chown;
 362         enum smbacl4_acedup_enum acedup;
 363         struct db_context *sid_mapping_table;
 364 } smbacl4_vfs_params;
 365
 366 /*
 367  * Gather special parameters for NFS4 ACL handling
 368  */
 369 static int smbacl4_get_vfs_params(
 370         const char *type_name,
 371         files_struct *fsp,
 372         smbacl4_vfs_params *params
 373 )
 374 {
 375         static const struct enum_list enum_smbacl4_modes[] = {
 376                 { e_simple, "simple" },
 377                 { e_special, "special" }
 378         };
 379         static const struct enum_list enum_smbacl4_acedups[] = {
 380                 { e_dontcare, "dontcare" },
 381                 { e_reject, "reject" },
 382                 { e_ignore, "ignore" },
 383                 { e_merge, "merge" },
 384         };
 385
 386         memset(params, 0, sizeof(smbacl4_vfs_params));
 387         params->mode = (enum smbacl4_mode_enum)lp_parm_enum(
 388                 SNUM(fsp->conn), type_name,
 389                 "mode", enum_smbacl4_modes, e_simple);
 390         params->do_chown = lp_parm_bool(SNUM(fsp->conn), type_name,
 391                 "chown", True);
 392         params->acedup = (enum smbacl4_acedup_enum)lp_parm_enum(
 393                 SNUM(fsp->conn), type_name,
 394                 "acedup", enum_smbacl4_acedups, e_dontcare);
 395
 396         DEBUG(10, ("mode:%s, do_chown:%s, acedup: %s\n",
 397                 enum_smbacl4_modes[params->mode].name,
 398                 params->do_chown ? "true" : "false",
 399                 enum_smbacl4_acedups[params->acedup].name));
 400
 401         return 0;
 402 }
 403
 404 static void smbacl4_dump_nfs4acl(int level, SMB4ACL_T *theacl)
 405 {
 406         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 407         SMB_ACE4_INT_T *aceint;
 408
 409         DEBUG(level, ("NFS4ACL: size=%d\n", aclint->naces));
 410
 411         for(aceint = aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
 412                 SMB_ACE4PROP_T *ace = &aceint->prop;
 413
 414                 DEBUG(level, ("\tACE: type=%d, flags=0x%x, fflags=0x%x, mask=0x%x, id=%d\n",
 415                         ace->aceType,
 416                         ace->aceFlags, ace->flags,
 417                         ace->aceMask,
 418                         ace->who.id));
 419         }
 420 }
 421
 422 /*
 423  * Find 2 NFS4 who-special ACE property (non-copy!!!)
 424  * match nonzero if "special" and who is equal
 425  * return ace if found matching; otherwise NULL
 426  */
 427 static SMB_ACE4PROP_T *smbacl4_find_equal_special(
 428         SMB4ACL_T *theacl,
 429         SMB_ACE4PROP_T *aceNew)
 430 {
 431         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 432         SMB_ACE4_INT_T *aceint;
 433
 434         for(aceint = aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
 435                 SMB_ACE4PROP_T *ace = &aceint->prop;
 436
 437                 DEBUG(10,("ace type:0x%x flags:0x%x aceFlags:0x%x "
 438                           "new type:0x%x flags:0x%x aceFlags:0x%x\n",
 439                           ace->aceType, ace->flags, ace->aceFlags,
 440                           aceNew->aceType, aceNew->flags,aceNew->aceFlags));
 441
 442                 if (ace->flags == aceNew->flags &&
 443                         ace->aceType==aceNew->aceType &&
 444                         ((ace->aceFlags&SMB_ACE4_INHERIT_ONLY_ACE)==
 445                          (aceNew->aceFlags&SMB_ACE4_INHERIT_ONLY_ACE)) &&
 446                         (ace->aceFlags&SMB_ACE4_IDENTIFIER_GROUP)==
 447                         (aceNew->aceFlags&SMB_ACE4_IDENTIFIER_GROUP)
 448                 ) {
 449                         /* keep type safety; e.g. gid is an u.short */
 450                         if (ace->flags & SMB_ACE4_ID_SPECIAL)
 451                         {
 452                                 if (ace->who.special_id==aceNew->who.special_id)
 453                                         return ace;
 454                         } else {
 455                                 if (ace->aceFlags & SMB_ACE4_IDENTIFIER_GROUP)
 456                                 {
 457                                         if (ace->who.gid==aceNew->who.gid)
 458                                                 return ace;
 459                                 } else {
 460                                         if (ace->who.uid==aceNew->who.uid)
 461                                                 return ace;
 462                                 }
 463                         }
 464                 }
 465         }
 466
 467         return NULL;
 468 }
 469
 470 static bool nfs4_map_sid(smbacl4_vfs_params *params, const DOM_SID *src,
 471                          DOM_SID *dst)
 472 {
 473         static struct db_context *mapping_db = NULL;
 474         TDB_DATA data;
 475
 476         if (mapping_db == NULL) {
 477                 const char *dbname = lp_parm_const_string(
 478                         -1, SMBACL4_PARAM_TYPE_NAME, "sidmap", NULL);
 479
 480                 if (dbname == NULL) {
 481                         DEBUG(10, ("%s:sidmap not defined\n",
 482                                    SMBACL4_PARAM_TYPE_NAME));
 483                         return False;
 484                 }
 485
 486                 become_root();
 487                 mapping_db = db_open(NULL, dbname, 0, TDB_DEFAULT,
 488                                      O_RDONLY, 0600);
 489                 unbecome_root();
 490
 491                 if (mapping_db == NULL) {
 492                         DEBUG(1, ("could not open sidmap: %s\n",
 493                                   strerror(errno)));
 494                         return False;
 495                 }
 496         }
 497
 498         if (mapping_db->fetch(mapping_db, NULL,
 499                               string_term_tdb_data(sid_string_tos(src)),
 500                               &data) == -1) {
 501                 DEBUG(10, ("could not find mapping for SID %s\n",
 502                            sid_string_dbg(src)));
 503                 return False;
 504         }
 505
 506         if ((data.dptr == NULL) || (data.dsize <= 0)
 507             || (data.dptr[data.dsize-1] != '\0')) {
 508                 DEBUG(5, ("invalid mapping for SID %s\n",
 509                           sid_string_dbg(src)));
 510                 TALLOC_FREE(data.dptr);
 511                 return False;
 512         }
 513
 514         if (!string_to_sid(dst, (char *)data.dptr)) {
 515                 DEBUG(1, ("invalid mapping %s for SID %s\n",
 516                           (char *)data.dptr, sid_string_dbg(src)));
 517                 TALLOC_FREE(data.dptr);
 518                 return False;
 519         }
 520
 521         TALLOC_FREE(data.dptr);
 522
 523         return True;
 524 }
 525
 526 static bool smbacl4_fill_ace4(
 527         TALLOC_CTX *mem_ctx,
 528         const char *filename,
 529         smbacl4_vfs_params *params,
 530         uid_t ownerUID,
 531         gid_t ownerGID,
 532         const SEC_ACE *ace_nt, /* input */
 533         SMB_ACE4PROP_T *ace_v4 /* output */
 534 )
 535 {
 536         DEBUG(10, ("got ace for %s\n", sid_string_dbg(&ace_nt->trustee)));
 537
 538         memset(ace_v4, 0, sizeof(SMB_ACE4PROP_T));
 539         ace_v4->aceType = ace_nt->type; /* only ACCESS|DENY supported right now */
 540         ace_v4->aceFlags = ace_nt->flags & SEC_ACE_FLAG_VALID_INHERIT;
 541         ace_v4->aceMask = ace_nt->access_mask &
 542                 (STD_RIGHT_ALL_ACCESS | SA_RIGHT_FILE_ALL_ACCESS);
 543
 544         se_map_generic(&ace_v4->aceMask, &file_generic_mapping);
 545
 546         if (ace_v4->aceFlags!=ace_nt->flags)
 547                 DEBUG(9, ("ace_v4->aceFlags(0x%x)!=ace_nt->flags(0x%x)\n",
 548                         ace_v4->aceFlags, ace_nt->flags));
 549
 550         if (ace_v4->aceMask!=ace_nt->access_mask)
 551                 DEBUG(9, ("ace_v4->aceMask(0x%x)!=ace_nt->access_mask(0x%x)\n",
 552                         ace_v4->aceMask, ace_nt->access_mask));
 553
 554         if (sid_equal(&ace_nt->trustee, &global_sid_World)) {
 555                 ace_v4->who.special_id = SMB_ACE4_WHO_EVERYONE;
 556                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
 557         } else {
 558                 const char *dom, *name;
 559                 enum lsa_SidType type;
 560                 uid_t uid;
 561                 gid_t gid;
 562                 DOM_SID sid;
 563
 564                 sid_copy(&sid, &ace_nt->trustee);
 565
 566                 if (!lookup_sid(mem_ctx, &sid, &dom, &name, &type)) {
 567
 568                         DOM_SID mapped;
 569
 570                         if (!nfs4_map_sid(params, &sid, &mapped)) {
 571                                 DEBUG(1, ("nfs4_acls.c: file [%s]: SID %s "
 572                                           "unknown\n", filename, sid_string_dbg(&sid)));
 573                                 errno = EINVAL;
 574                                 return False;
 575                         }
 576
 577                         DEBUG(2, ("nfs4_acls.c: file [%s]: mapped SID %s "
 578                                   "to %s\n", filename, sid_string_dbg(&sid), sid_string_dbg(&mapped)));
 579
 580                         if (!lookup_sid(mem_ctx, &mapped, &dom,
 581                                         &name, &type)) {
 582                                 DEBUG(1, ("nfs4_acls.c: file [%s]: SID %s "
 583                                           "mapped from %s is unknown\n",
 584                                           filename, sid_string_dbg(&mapped), sid_string_dbg(&sid)));
 585                                 errno = EINVAL;
 586                                 return False;
 587                         }
 588
 589                         sid_copy(&sid, &mapped);
 590                 }
 591
 592                 if (type == SID_NAME_USER) {
 593                         if (!sid_to_uid(&sid, &uid)) {
 594                                 DEBUG(1, ("nfs4_acls.c: file [%s]: could not "
 595                                           "convert %s to uid\n", filename,
 596                                           sid_string_dbg(&sid)));
 597                                 return False;
 598                         }
 599
 600                         if (params->mode==e_special && uid==ownerUID) {
 601                                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
 602                                 ace_v4->who.special_id = SMB_ACE4_WHO_OWNER;
 603                         } else {
 604                                 ace_v4->who.uid = uid;
 605                         }
 606                 } else { /* else group? - TODO check it... */
 607                         if (!sid_to_gid(&sid, &gid)) {
 608                                 DEBUG(1, ("nfs4_acls.c: file [%s]: could not "
 609                                           "convert %s to gid\n", filename,
 610                                           sid_string_dbg(&sid)));
 611                                 return False;
 612                         }
 613
 614                         ace_v4->aceFlags |= SMB_ACE4_IDENTIFIER_GROUP;
 615
 616                         if (params->mode==e_special && gid==ownerGID) {
 617                                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
 618                                 ace_v4->who.special_id = SMB_ACE4_WHO_GROUP;
 619                         } else {
 620                                 ace_v4->who.gid = gid;
 621                         }
 622                 }
 623         }
 624
 625         return True; /* OK */
 626 }
 627
 628 static int smbacl4_MergeIgnoreReject(
 629         enum smbacl4_acedup_enum acedup,
 630         SMB4ACL_T *theacl, /* may modify it */
 631         SMB_ACE4PROP_T *ace, /* the "new" ACE */
 632         bool    *paddNewACE,
 633         int     i
 634 )
 635 {
 636         int     result = 0;
 637         SMB_ACE4PROP_T *ace4found = smbacl4_find_equal_special(theacl, ace);
 638         if (ace4found)
 639         {
 640                 switch(acedup)
 641                 {
 642                 case e_merge: /* "merge" flags */
 643                         *paddNewACE = False;
 644                         ace4found->aceFlags |= ace->aceFlags;
 645                         ace4found->aceMask |= ace->aceMask;
 646                         break;
 647                 case e_ignore: /* leave out this record */
 648                         *paddNewACE = False;
 649                         break;
 650                 case e_reject: /* do an error */
 651                         DEBUG(8, ("ACL rejected by duplicate nt ace#%d\n", i));
 652                         errno = EINVAL; /* SHOULD be set on any _real_ error */
 653                         result = -1;
 654                         break;
 655                 default:
 656                         break;
 657                 }
 658         }
 659         return result;
 660 }
 661
 662 static SMB4ACL_T *smbacl4_win2nfs4(
 663         const char *filename,
 664         const SEC_ACL *dacl,
 665         smbacl4_vfs_params *pparams,
 666         uid_t ownerUID,
 667         gid_t ownerGID
 668 )
 669 {
 670         SMB4ACL_T *theacl;
 671         uint32  i;
 672         TALLOC_CTX *mem_ctx = talloc_tos();
 673
 674         DEBUG(10, ("smbacl4_win2nfs4 invoked\n"));
 675
 676         theacl = smb_create_smb4acl();
 677         if (theacl==NULL)
 678                 return NULL;
 679
 680         for(i=0; i<dacl->num_aces; i++) {
 681                 SMB_ACE4PROP_T  ace_v4;
 682                 bool    addNewACE = True;
 683
 684                 if (!smbacl4_fill_ace4(mem_ctx, filename, pparams,
 685                                        ownerUID, ownerGID,
 686                                        dacl->aces + i, &ace_v4)) {
 687                         DEBUG(3, ("Could not fill ace for file %s, SID %s\n",
 688                                   filename,
 689                                   sid_string_dbg(&((dacl->aces+i)->trustee))));
 690                         continue;
 691                 }
 692
 693                 if (pparams->acedup!=e_dontcare) {
 694                         if (smbacl4_MergeIgnoreReject(pparams->acedup, theacl,
 695                                 &ace_v4, &addNewACE, i))
 696                                 return NULL;
 697                 }
 698
 699                 if (addNewACE)
 700                         smb_add_ace4(theacl, &ace_v4);
 701         }
 702
 703         return theacl;
 704 }
 705
 706 NTSTATUS smb_set_nt_acl_nfs4(files_struct *fsp,
 707         uint32 security_info_sent,
 708         const SEC_DESC *psd,
 709         set_nfs4acl_native_fn_t set_nfs4_native)
 710 {
 711         smbacl4_vfs_params params;
 712         SMB4ACL_T *theacl = NULL;
 713         bool    result;
 714
 715         SMB_STRUCT_STAT sbuf;
 716         bool set_acl_as_root = false;
 717         uid_t newUID = (uid_t)-1;
 718         gid_t newGID = (gid_t)-1;
 719         int saved_errno;
 720
 721         DEBUG(10, ("smb_set_nt_acl_nfs4 invoked for %s\n", fsp_str_dbg(fsp)));
 722
 723         if ((security_info_sent & (DACL_SECURITY_INFORMATION |
 724                 GROUP_SECURITY_INFORMATION | OWNER_SECURITY_INFORMATION)) == 0)
 725         {
 726                 DEBUG(9, ("security_info_sent (0x%x) ignored\n",
 727                         security_info_sent));
 728                 return NT_STATUS_OK; /* won't show error - later to be refined... */
 729         }
 730
 731         /* Special behaviours */
 732         if (smbacl4_get_vfs_params(SMBACL4_PARAM_TYPE_NAME, fsp, &params))
 733                 return NT_STATUS_NO_MEMORY;
 734
 735         if (smbacl4_fGetFileOwner(fsp, &sbuf))
 736                 return map_nt_error_from_unix(errno);
 737
 738         if (params.do_chown) {
 739                 /* chown logic is a copy/paste from posix_acl.c:set_nt_acl */
 740                 NTSTATUS status = unpack_nt_owners(SNUM(fsp->conn), &newUID, &newGID, security_info_sent, psd);
 741                 if (!NT_STATUS_IS_OK(status)) {
 742                         DEBUG(8, ("unpack_nt_owners failed"));
 743                         return status;
 744                 }
 745                 if (((newUID != (uid_t)-1) && (sbuf.st_ex_uid != newUID)) ||
 746                     ((newGID != (gid_t)-1) && (sbuf.st_ex_gid != newGID))) {
 747
 748                         if(try_chown(fsp->conn, fsp->fsp_name, newUID,
 749                                      newGID)) {
 750                                 DEBUG(3,("chown %s, %u, %u failed. Error = "
 751                                          "%s.\n", fsp_str_dbg(fsp),
 752                                          (unsigned int)newUID,
 753                                          (unsigned int)newGID,
 754                                          strerror(errno)));
 755                                 return map_nt_error_from_unix(errno);
 756                         }
 757
 758                         DEBUG(10,("chown %s, %u, %u succeeded.\n",
 759                                   fsp_str_dbg(fsp), (unsigned int)newUID,
 760                                   (unsigned int)newGID));
 761                         if (smbacl4_GetFileOwner(fsp->conn,
 762                                                  fsp->fsp_name->base_name,
 763                                                  &sbuf))
 764                                 return map_nt_error_from_unix(errno);
 765
 766                         /* If we successfully chowned, we know we must
 767                          * be able to set the acl, so do it as root.
 768                          */
 769                         set_acl_as_root = true;
 770                 }
 771         }
 772
 773         if (!(security_info_sent & DACL_SECURITY_INFORMATION) || psd->dacl ==NULL) {
 774                 DEBUG(10, ("no dacl found; security_info_sent = 0x%x\n", security_info_sent));
 775                 return NT_STATUS_OK;
 776         }
 777
 778         theacl = smbacl4_win2nfs4(fsp->fsp_name->base_name, psd->dacl, &params,
 779                                   sbuf.st_ex_uid, sbuf.st_ex_gid);
 780         if (!theacl)
 781                 return map_nt_error_from_unix(errno);
 782
 783         smbacl4_dump_nfs4acl(10, theacl);
 784
 785         if (set_acl_as_root) {
 786                 become_root();
 787         }
 788         result = set_nfs4_native(fsp, theacl);
 789         saved_errno = errno;
 790         if (set_acl_as_root) {
 791                 unbecome_root();
 792         }
 793         if (result!=True) {
 794                 errno = saved_errno;
 795                 DEBUG(10, ("set_nfs4_native failed with %s\n", strerror(errno)));
 796                 return map_nt_error_from_unix(errno);
 797         }
 798
 799         DEBUG(10, ("smb_set_nt_acl_nfs4 succeeded\n"));
 800         return NT_STATUS_OK;
 801 }