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