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 "smbd/smbd.h"
  22 #include "nfs4_acls.h"
  23 #include "librpc/gen_ndr/ndr_security.h"
  24 #include "../libcli/security/dom_sid.h"
  25 #include "../libcli/security/security.h"
  26 #include "include/dbwrap.h"
  27 #include "system/filesys.h"
  28 #include "passdb/lookup_sid.h"
  29
  30 #undef DBGC_CLASS
  31 #define DBGC_CLASS DBGC_ACLS
  32
  33 #define SMBACL4_PARAM_TYPE_NAME "nfs4"
  34
  35 extern const struct generic_mapping file_generic_mapping;
  36
  37 #define SMB_ACE4_INT_MAGIC 0x76F8A967
  38 typedef struct _SMB_ACE4_INT_T
  39 {
  40         uint32  magic;
  41         SMB_ACE4PROP_T  prop;
  42         void    *next;
  43 } SMB_ACE4_INT_T;
  44
  45 #define SMB_ACL4_INT_MAGIC 0x29A3E792
  46 typedef struct _SMB_ACL4_INT_T
  47 {
  48         uint32  magic;
  49         uint32  naces;
  50         SMB_ACE4_INT_T  *first;
  51         SMB_ACE4_INT_T  *last;
  52 } SMB_ACL4_INT_T;
  53
  54 static SMB_ACL4_INT_T *get_validated_aclint(SMB4ACL_T *theacl)
  55 {
  56         SMB_ACL4_INT_T *aclint = (SMB_ACL4_INT_T *)theacl;
  57         if (theacl==NULL)
  58         {
  59                 DEBUG(2, ("acl is NULL\n"));
  60                 errno = EINVAL;
  61                 return NULL;
  62         }
  63         if (aclint->magic!=SMB_ACL4_INT_MAGIC)
  64         {
  65                 DEBUG(2, ("aclint bad magic 0x%x\n", aclint->magic));
  66                 errno = EINVAL;
  67                 return NULL;
  68         }
  69         return aclint;
  70 }
  71
  72 static SMB_ACE4_INT_T *get_validated_aceint(SMB4ACE_T *ace)
  73 {
  74         SMB_ACE4_INT_T *aceint = (SMB_ACE4_INT_T *)ace;
  75         if (ace==NULL)
  76         {
  77                 DEBUG(2, ("ace is NULL\n"));
  78                 errno = EINVAL;
  79                 return NULL;
  80         }
  81         if (aceint->magic!=SMB_ACE4_INT_MAGIC)
  82         {
  83                 DEBUG(2, ("aceint bad magic 0x%x\n", aceint->magic));
  84                 errno = EINVAL;
  85                 return NULL;
  86         }
  87         return aceint;
  88 }
  89
  90 SMB4ACL_T *smb_create_smb4acl(void)
  91 {
  92         TALLOC_CTX *mem_ctx = talloc_tos();
  93         SMB_ACL4_INT_T  *theacl = (SMB_ACL4_INT_T *)TALLOC_ZERO_SIZE(mem_ctx, sizeof(SMB_ACL4_INT_T));
  94         if (theacl==NULL)
  95         {
  96                 DEBUG(0, ("TALLOC_SIZE failed\n"));
  97                 errno = ENOMEM;
  98                 return NULL;
  99         }
 100         theacl->magic = SMB_ACL4_INT_MAGIC;
 101         /* theacl->first, last = NULL not needed */
 102         return (SMB4ACL_T *)theacl;
 103 }
 104
 105 SMB4ACE_T *smb_add_ace4(SMB4ACL_T *theacl, SMB_ACE4PROP_T *prop)
 106 {
 107         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 108         TALLOC_CTX *mem_ctx = talloc_tos();
 109         SMB_ACE4_INT_T *ace;
 110
 111         ace = (SMB_ACE4_INT_T *)TALLOC_ZERO_SIZE(mem_ctx, sizeof(SMB_ACE4_INT_T));
 112         if (ace==NULL)
 113         {
 114                 DEBUG(0, ("TALLOC_SIZE failed\n"));
 115                 errno = ENOMEM;
 116                 return NULL;
 117         }
 118         ace->magic = SMB_ACE4_INT_MAGIC;
 119         /* ace->next = NULL not needed */
 120         memcpy(&ace->prop, prop, sizeof(SMB_ACE4PROP_T));
 121
 122         if (aclint->first==NULL)
 123         {
 124                 aclint->first = ace;
 125                 aclint->last = ace;
 126         } else {
 127                 aclint->last->next = (void *)ace;
 128                 aclint->last = ace;
 129         }
 130         aclint->naces++;
 131
 132         return (SMB4ACE_T *)ace;
 133 }
 134
 135 SMB_ACE4PROP_T *smb_get_ace4(SMB4ACE_T *ace)
 136 {
 137         SMB_ACE4_INT_T *aceint = get_validated_aceint(ace);
 138         if (aceint==NULL)
 139                 return NULL;
 140
 141         return &aceint->prop;
 142 }
 143
 144 SMB4ACE_T *smb_next_ace4(SMB4ACE_T *ace)
 145 {
 146         SMB_ACE4_INT_T *aceint = get_validated_aceint(ace);
 147         if (aceint==NULL)
 148                 return NULL;
 149
 150         return (SMB4ACE_T *)aceint->next;
 151 }
 152
 153 SMB4ACE_T *smb_first_ace4(SMB4ACL_T *theacl)
 154 {
 155         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 156         if (aclint==NULL)
 157                 return NULL;
 158
 159         return (SMB4ACE_T *)aclint->first;
 160 }
 161
 162 uint32 smb_get_naces(SMB4ACL_T *theacl)
 163 {
 164         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 165         if (aclint==NULL)
 166                 return 0;
 167
 168         return aclint->naces;
 169 }
 170
 171 static int smbacl4_GetFileOwner(struct connection_struct *conn,
 172                                 const char *filename,
 173                                 SMB_STRUCT_STAT *psbuf)
 174 {
 175         memset(psbuf, 0, sizeof(SMB_STRUCT_STAT));
 176
 177         /* Get the stat struct for the owner info. */
 178         if (vfs_stat_smb_fname(conn, filename, psbuf) != 0)
 179         {
 180                 DEBUG(8, ("vfs_stat_smb_fname failed with error %s\n",
 181                         strerror(errno)));
 182                 return -1;
 183         }
 184
 185         return 0;
 186 }
 187
 188 static int smbacl4_fGetFileOwner(files_struct *fsp, SMB_STRUCT_STAT *psbuf)
 189 {
 190         memset(psbuf, 0, sizeof(SMB_STRUCT_STAT));
 191
 192         if (fsp->fh->fd == -1) {
 193                 return smbacl4_GetFileOwner(fsp->conn,
 194                                             fsp->fsp_name->base_name, psbuf);
 195         }
 196         if (SMB_VFS_FSTAT(fsp, psbuf) != 0)
 197         {
 198                 DEBUG(8, ("SMB_VFS_FSTAT failed with error %s\n",
 199                         strerror(errno)));
 200                 return -1;
 201         }
 202
 203         return 0;
 204 }
 205
 206 static bool smbacl4_nfs42win(TALLOC_CTX *mem_ctx, SMB4ACL_T *theacl, /* in */
 207         struct dom_sid *psid_owner, /* in */
 208         struct dom_sid *psid_group, /* in */
 209         bool is_directory, /* in */
 210         struct security_ace **ppnt_ace_list, /* out */
 211         int *pgood_aces /* out */
 212 )
 213 {
 214         SMB_ACL4_INT_T *aclint = (SMB_ACL4_INT_T *)theacl;
 215         SMB_ACE4_INT_T *aceint;
 216         struct security_ace *nt_ace_list = NULL;
 217         int good_aces = 0;
 218
 219         DEBUG(10, ("smbacl_nfs42win entered\n"));
 220
 221         aclint = get_validated_aclint(theacl);
 222         /* We do not check for naces being 0 or theacl being NULL here because it is done upstream */
 223         /* in smb_get_nt_acl_nfs4(). */
 224         nt_ace_list = (struct security_ace *)TALLOC_ZERO_SIZE(mem_ctx, aclint->naces * sizeof(struct security_ace));
 225         if (nt_ace_list==NULL)
 226         {
 227                 DEBUG(10, ("talloc error"));
 228                 errno = ENOMEM;
 229                 return False;
 230         }
 231
 232         for (aceint=aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
 233                 uint32_t mask;
 234                 struct dom_sid sid;
 235                 SMB_ACE4PROP_T  *ace = &aceint->prop;
 236                 uint32_t mapped_ace_flags;
 237
 238                 DEBUG(10, ("magic: 0x%x, type: %d, iflags: %x, flags: %x, mask: %x, "
 239                         "who: %d\n", aceint->magic, ace->aceType, ace->flags,
 240                         ace->aceFlags, ace->aceMask, ace->who.id));
 241
 242                 SMB_ASSERT(aceint->magic==SMB_ACE4_INT_MAGIC);
 243
 244                 if (ace->flags & SMB_ACE4_ID_SPECIAL) {
 245                         switch (ace->who.special_id) {
 246                         case SMB_ACE4_WHO_OWNER:
 247                                 sid_copy(&sid, psid_owner);
 248                                 break;
 249                         case SMB_ACE4_WHO_GROUP:
 250                                 sid_copy(&sid, psid_group);
 251                                 break;
 252                         case SMB_ACE4_WHO_EVERYONE:
 253                                 sid_copy(&sid, &global_sid_World);
 254                                 break;
 255                         default:
 256                                 DEBUG(8, ("invalid special who id %d "
 257                                         "ignored\n", ace->who.special_id));
 258                         }
 259                 } else {
 260                         if (ace->aceFlags & SMB_ACE4_IDENTIFIER_GROUP) {
 261                                 gid_to_sid(&sid, ace->who.gid);
 262                         } else {
 263                                 uid_to_sid(&sid, ace->who.uid);
 264                         }
 265                 }
 266                 DEBUG(10, ("mapped %d to %s\n", ace->who.id,
 267                            sid_string_dbg(&sid)));
 268
 269                 if (is_directory && (ace->aceMask & SMB_ACE4_ADD_FILE)) {
 270                         ace->aceMask |= SMB_ACE4_DELETE_CHILD;
 271                 }
 272
 273                 mapped_ace_flags = ace->aceFlags & 0xf;
 274                 if (!is_directory && (mapped_ace_flags & (SMB_ACE4_FILE_INHERIT_ACE|SMB_ACE4_DIRECTORY_INHERIT_ACE))) {
 275                         /*
 276                          * GPFS sets inherits dir_inhert and file_inherit flags
 277                          * to files, too, which confuses windows, and seems to
 278                          * be wrong anyways. ==> Map these bits away for files.
 279                          */
 280                         DEBUG(10, ("removing inherit flags from nfs4 ace\n"));
 281                         mapped_ace_flags &= ~(SMB_ACE4_FILE_INHERIT_ACE|SMB_ACE4_DIRECTORY_INHERIT_ACE);
 282                 }
 283                 DEBUG(10, ("mapped ace flags: 0x%x => 0x%x\n",
 284                       ace->aceFlags, mapped_ace_flags));
 285
 286                 /* Windows clients expect SYNC on acls to
 287                    correctly allow rename. See bug #7909. */
 288                 mask = ace->aceMask | SMB_ACE4_SYNCHRONIZE;
 289                 init_sec_ace(&nt_ace_list[good_aces++], &sid,
 290                         ace->aceType, mask,
 291                         mapped_ace_flags);
 292         }
 293
 294         *ppnt_ace_list = nt_ace_list;
 295         *pgood_aces = good_aces;
 296
 297         return True;
 298 }
 299
 300 static NTSTATUS smb_get_nt_acl_nfs4_common(const SMB_STRUCT_STAT *sbuf,
 301         uint32 security_info,
 302         struct security_descriptor **ppdesc, SMB4ACL_T *theacl)
 303 {
 304         int     good_aces = 0;
 305         struct dom_sid sid_owner, sid_group;
 306         size_t sd_size = 0;
 307         struct security_ace *nt_ace_list = NULL;
 308         struct security_acl *psa = NULL;
 309         TALLOC_CTX *mem_ctx = talloc_tos();
 310
 311         if (theacl==NULL || smb_get_naces(theacl)==0)
 312                 return NT_STATUS_ACCESS_DENIED; /* special because we
 313                                                  * shouldn't alloc 0 for
 314                                                  * win */
 315
 316         uid_to_sid(&sid_owner, sbuf->st_ex_uid);
 317         gid_to_sid(&sid_group, sbuf->st_ex_gid);
 318
 319         if (smbacl4_nfs42win(mem_ctx, theacl, &sid_owner, &sid_group,
 320                              S_ISDIR(sbuf->st_ex_mode),
 321                                 &nt_ace_list, &good_aces)==False) {
 322                 DEBUG(8,("smbacl4_nfs42win failed\n"));
 323                 return map_nt_error_from_unix(errno);
 324         }
 325
 326         psa = make_sec_acl(mem_ctx, NT4_ACL_REVISION, good_aces, nt_ace_list);
 327         if (psa == NULL) {
 328                 DEBUG(2,("make_sec_acl failed\n"));
 329                 return NT_STATUS_NO_MEMORY;
 330         }
 331
 332         DEBUG(10,("after make sec_acl\n"));
 333         *ppdesc = make_sec_desc(mem_ctx, SD_REVISION, SEC_DESC_SELF_RELATIVE,
 334                                 (security_info & SECINFO_OWNER) ? &sid_owner : NULL,
 335                                 (security_info & SECINFO_GROUP) ? &sid_group : NULL,
 336                                 NULL, psa, &sd_size);
 337         if (*ppdesc==NULL) {
 338                 DEBUG(2,("make_sec_desc failed\n"));
 339                 return NT_STATUS_NO_MEMORY;
 340         }
 341
 342         DEBUG(10, ("smb_get_nt_acl_nfs4_common successfully exited with sd_size %d\n",
 343                    (int)ndr_size_security_descriptor(*ppdesc, 0)));
 344
 345         return NT_STATUS_OK;
 346 }
 347
 348 NTSTATUS smb_fget_nt_acl_nfs4(files_struct *fsp,
 349                                uint32 security_info,
 350                                struct security_descriptor **ppdesc, SMB4ACL_T *theacl)
 351 {
 352         SMB_STRUCT_STAT sbuf;
 353
 354         DEBUG(10, ("smb_fget_nt_acl_nfs4 invoked for %s\n", fsp_str_dbg(fsp)));
 355
 356         if (smbacl4_fGetFileOwner(fsp, &sbuf)) {
 357                 return map_nt_error_from_unix(errno);
 358         }
 359
 360         return smb_get_nt_acl_nfs4_common(&sbuf, security_info, ppdesc, theacl);
 361 }
 362
 363 NTSTATUS smb_get_nt_acl_nfs4(struct connection_struct *conn,
 364                               const char *name,
 365                               uint32 security_info,
 366                               struct security_descriptor **ppdesc, SMB4ACL_T *theacl)
 367 {
 368         SMB_STRUCT_STAT sbuf;
 369
 370         DEBUG(10, ("smb_get_nt_acl_nfs4 invoked for %s\n", name));
 371
 372         if (smbacl4_GetFileOwner(conn, name, &sbuf)) {
 373                 return map_nt_error_from_unix(errno);
 374         }
 375
 376         return smb_get_nt_acl_nfs4_common(&sbuf, security_info, ppdesc, theacl);
 377 }
 378
 379 enum smbacl4_mode_enum {e_simple=0, e_special=1};
 380 enum smbacl4_acedup_enum {e_dontcare=0, e_reject=1, e_ignore=2, e_merge=3};
 381
 382 typedef struct _smbacl4_vfs_params {
 383         enum smbacl4_mode_enum mode;
 384         bool do_chown;
 385         enum smbacl4_acedup_enum acedup;
 386         struct db_context *sid_mapping_table;
 387 } smbacl4_vfs_params;
 388
 389 /*
 390  * Gather special parameters for NFS4 ACL handling
 391  */
 392 static int smbacl4_get_vfs_params(
 393         const char *type_name,
 394         files_struct *fsp,
 395         smbacl4_vfs_params *params
 396 )
 397 {
 398         static const struct enum_list enum_smbacl4_modes[] = {
 399                 { e_simple, "simple" },
 400                 { e_special, "special" }
 401         };
 402         static const struct enum_list enum_smbacl4_acedups[] = {
 403                 { e_dontcare, "dontcare" },
 404                 { e_reject, "reject" },
 405                 { e_ignore, "ignore" },
 406                 { e_merge, "merge" },
 407         };
 408
 409         memset(params, 0, sizeof(smbacl4_vfs_params));
 410         params->mode = (enum smbacl4_mode_enum)lp_parm_enum(
 411                 SNUM(fsp->conn), type_name,
 412                 "mode", enum_smbacl4_modes, e_simple);
 413         params->do_chown = lp_parm_bool(SNUM(fsp->conn), type_name,
 414                 "chown", True);
 415         params->acedup = (enum smbacl4_acedup_enum)lp_parm_enum(
 416                 SNUM(fsp->conn), type_name,
 417                 "acedup", enum_smbacl4_acedups, e_dontcare);
 418
 419         DEBUG(10, ("mode:%s, do_chown:%s, acedup: %s\n",
 420                 enum_smbacl4_modes[params->mode].name,
 421                 params->do_chown ? "true" : "false",
 422                 enum_smbacl4_acedups[params->acedup].name));
 423
 424         return 0;
 425 }
 426
 427 static void smbacl4_dump_nfs4acl(int level, SMB4ACL_T *theacl)
 428 {
 429         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 430         SMB_ACE4_INT_T *aceint;
 431
 432         DEBUG(level, ("NFS4ACL: size=%d\n", aclint->naces));
 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(level, ("\tACE: type=%d, flags=0x%x, fflags=0x%x, mask=0x%x, id=%d\n",
 438                         ace->aceType,
 439                         ace->aceFlags, ace->flags,
 440                         ace->aceMask,
 441                         ace->who.id));
 442         }
 443 }
 444
 445 /*
 446  * Find 2 NFS4 who-special ACE property (non-copy!!!)
 447  * match nonzero if "special" and who is equal
 448  * return ace if found matching; otherwise NULL
 449  */
 450 static SMB_ACE4PROP_T *smbacl4_find_equal_special(
 451         SMB4ACL_T *theacl,
 452         SMB_ACE4PROP_T *aceNew)
 453 {
 454         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 455         SMB_ACE4_INT_T *aceint;
 456
 457         for(aceint = aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
 458                 SMB_ACE4PROP_T *ace = &aceint->prop;
 459
 460                 DEBUG(10,("ace type:0x%x flags:0x%x aceFlags:0x%x "
 461                           "new type:0x%x flags:0x%x aceFlags:0x%x\n",
 462                           ace->aceType, ace->flags, ace->aceFlags,
 463                           aceNew->aceType, aceNew->flags,aceNew->aceFlags));
 464
 465                 if (ace->flags == aceNew->flags &&
 466                         ace->aceType==aceNew->aceType &&
 467                         ((ace->aceFlags&SMB_ACE4_INHERIT_ONLY_ACE)==
 468                          (aceNew->aceFlags&SMB_ACE4_INHERIT_ONLY_ACE)) &&
 469                         (ace->aceFlags&SMB_ACE4_IDENTIFIER_GROUP)==
 470                         (aceNew->aceFlags&SMB_ACE4_IDENTIFIER_GROUP)
 471                 ) {
 472                         /* keep type safety; e.g. gid is an u.short */
 473                         if (ace->flags & SMB_ACE4_ID_SPECIAL)
 474                         {
 475                                 if (ace->who.special_id==aceNew->who.special_id)
 476                                         return ace;
 477                         } else {
 478                                 if (ace->aceFlags & SMB_ACE4_IDENTIFIER_GROUP)
 479                                 {
 480                                         if (ace->who.gid==aceNew->who.gid)
 481                                                 return ace;
 482                                 } else {
 483                                         if (ace->who.uid==aceNew->who.uid)
 484                                                 return ace;
 485                                 }
 486                         }
 487                 }
 488         }
 489
 490         return NULL;
 491 }
 492
 493 static bool nfs4_map_sid(smbacl4_vfs_params *params, const struct dom_sid *src,
 494                          struct dom_sid *dst)
 495 {
 496         static struct db_context *mapping_db = NULL;
 497         TDB_DATA data;
 498
 499         if (mapping_db == NULL) {
 500                 const char *dbname = lp_parm_const_string(
 501                         -1, SMBACL4_PARAM_TYPE_NAME, "sidmap", NULL);
 502
 503                 if (dbname == NULL) {
 504                         DEBUG(10, ("%s:sidmap not defined\n",
 505                                    SMBACL4_PARAM_TYPE_NAME));
 506                         return False;
 507                 }
 508
 509                 become_root();
 510                 mapping_db = db_open(NULL, dbname, 0, TDB_DEFAULT,
 511                                      O_RDONLY, 0600);
 512                 unbecome_root();
 513
 514                 if (mapping_db == NULL) {
 515                         DEBUG(1, ("could not open sidmap: %s\n",
 516                                   strerror(errno)));
 517                         return False;
 518                 }
 519         }
 520
 521         if (mapping_db->fetch(mapping_db, NULL,
 522                               string_term_tdb_data(sid_string_tos(src)),
 523                               &data) == -1) {
 524                 DEBUG(10, ("could not find mapping for SID %s\n",
 525                            sid_string_dbg(src)));
 526                 return False;
 527         }
 528
 529         if ((data.dptr == NULL) || (data.dsize <= 0)
 530             || (data.dptr[data.dsize-1] != '\0')) {
 531                 DEBUG(5, ("invalid mapping for SID %s\n",
 532                           sid_string_dbg(src)));
 533                 TALLOC_FREE(data.dptr);
 534                 return False;
 535         }
 536
 537         if (!string_to_sid(dst, (char *)data.dptr)) {
 538                 DEBUG(1, ("invalid mapping %s for SID %s\n",
 539                           (char *)data.dptr, sid_string_dbg(src)));
 540                 TALLOC_FREE(data.dptr);
 541                 return False;
 542         }
 543
 544         TALLOC_FREE(data.dptr);
 545
 546         return True;
 547 }
 548
 549 static bool smbacl4_fill_ace4(
 550         TALLOC_CTX *mem_ctx,
 551         const char *filename,
 552         smbacl4_vfs_params *params,
 553         uid_t ownerUID,
 554         gid_t ownerGID,
 555         const struct security_ace *ace_nt, /* input */
 556         SMB_ACE4PROP_T *ace_v4 /* output */
 557 )
 558 {
 559         DEBUG(10, ("got ace for %s\n", sid_string_dbg(&ace_nt->trustee)));
 560
 561         memset(ace_v4, 0, sizeof(SMB_ACE4PROP_T));
 562         ace_v4->aceType = ace_nt->type; /* only ACCESS|DENY supported right now */
 563         ace_v4->aceFlags = ace_nt->flags & SEC_ACE_FLAG_VALID_INHERIT;
 564         ace_v4->aceMask = ace_nt->access_mask &
 565                 (SEC_STD_ALL | SEC_FILE_ALL);
 566
 567         se_map_generic(&ace_v4->aceMask, &file_generic_mapping);
 568
 569         if (ace_v4->aceFlags!=ace_nt->flags)
 570                 DEBUG(9, ("ace_v4->aceFlags(0x%x)!=ace_nt->flags(0x%x)\n",
 571                         ace_v4->aceFlags, ace_nt->flags));
 572
 573         if (ace_v4->aceMask!=ace_nt->access_mask)
 574                 DEBUG(9, ("ace_v4->aceMask(0x%x)!=ace_nt->access_mask(0x%x)\n",
 575                         ace_v4->aceMask, ace_nt->access_mask));
 576
 577         if (dom_sid_equal(&ace_nt->trustee, &global_sid_World)) {
 578                 ace_v4->who.special_id = SMB_ACE4_WHO_EVERYONE;
 579                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
 580         } else {
 581                 const char *dom, *name;
 582                 enum lsa_SidType type;
 583                 uid_t uid;
 584                 gid_t gid;
 585                 struct dom_sid sid;
 586
 587                 sid_copy(&sid, &ace_nt->trustee);
 588
 589                 if (!lookup_sid(mem_ctx, &sid, &dom, &name, &type)) {
 590
 591                         struct dom_sid mapped;
 592
 593                         if (!nfs4_map_sid(params, &sid, &mapped)) {
 594                                 DEBUG(1, ("nfs4_acls.c: file [%s]: SID %s "
 595                                           "unknown\n", filename, sid_string_dbg(&sid)));
 596                                 errno = EINVAL;
 597                                 return False;
 598                         }
 599
 600                         DEBUG(2, ("nfs4_acls.c: file [%s]: mapped SID %s "
 601                                   "to %s\n", filename, sid_string_dbg(&sid), sid_string_dbg(&mapped)));
 602
 603                         if (!lookup_sid(mem_ctx, &mapped, &dom,
 604                                         &name, &type)) {
 605                                 DEBUG(1, ("nfs4_acls.c: file [%s]: SID %s "
 606                                           "mapped from %s is unknown\n",
 607                                           filename, sid_string_dbg(&mapped), sid_string_dbg(&sid)));
 608                                 errno = EINVAL;
 609                                 return False;
 610                         }
 611
 612                         sid_copy(&sid, &mapped);
 613                 }
 614
 615                 if (type == SID_NAME_USER) {
 616                         if (!sid_to_uid(&sid, &uid)) {
 617                                 DEBUG(1, ("nfs4_acls.c: file [%s]: could not "
 618                                           "convert %s to uid\n", filename,
 619                                           sid_string_dbg(&sid)));
 620                                 return False;
 621                         }
 622
 623                         if (params->mode==e_special && uid==ownerUID) {
 624                                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
 625                                 ace_v4->who.special_id = SMB_ACE4_WHO_OWNER;
 626                         } else {
 627                                 ace_v4->who.uid = uid;
 628                         }
 629                 } else { /* else group? - TODO check it... */
 630                         if (!sid_to_gid(&sid, &gid)) {
 631                                 DEBUG(1, ("nfs4_acls.c: file [%s]: could not "
 632                                           "convert %s to gid\n", filename,
 633                                           sid_string_dbg(&sid)));
 634                                 return False;
 635                         }
 636
 637                         ace_v4->aceFlags |= SMB_ACE4_IDENTIFIER_GROUP;
 638
 639                         if (params->mode==e_special && gid==ownerGID) {
 640                                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
 641                                 ace_v4->who.special_id = SMB_ACE4_WHO_GROUP;
 642                         } else {
 643                                 ace_v4->who.gid = gid;
 644                         }
 645                 }
 646         }
 647
 648         return True; /* OK */
 649 }
 650
 651 static int smbacl4_MergeIgnoreReject(
 652         enum smbacl4_acedup_enum acedup,
 653         SMB4ACL_T *theacl, /* may modify it */
 654         SMB_ACE4PROP_T *ace, /* the "new" ACE */
 655         bool    *paddNewACE,
 656         int     i
 657 )
 658 {
 659         int     result = 0;
 660         SMB_ACE4PROP_T *ace4found = smbacl4_find_equal_special(theacl, ace);
 661         if (ace4found)
 662         {
 663                 switch(acedup)
 664                 {
 665                 case e_merge: /* "merge" flags */
 666                         *paddNewACE = False;
 667                         ace4found->aceFlags |= ace->aceFlags;
 668                         ace4found->aceMask |= ace->aceMask;
 669                         break;
 670                 case e_ignore: /* leave out this record */
 671                         *paddNewACE = False;
 672                         break;
 673                 case e_reject: /* do an error */
 674                         DEBUG(8, ("ACL rejected by duplicate nt ace#%d\n", i));
 675                         errno = EINVAL; /* SHOULD be set on any _real_ error */
 676                         result = -1;
 677                         break;
 678                 default:
 679                         break;
 680                 }
 681         }
 682         return result;
 683 }
 684
 685 static SMB4ACL_T *smbacl4_win2nfs4(
 686         const char *filename,
 687         const struct security_acl *dacl,
 688         smbacl4_vfs_params *pparams,
 689         uid_t ownerUID,
 690         gid_t ownerGID
 691 )
 692 {
 693         SMB4ACL_T *theacl;
 694         uint32  i;
 695         TALLOC_CTX *mem_ctx = talloc_tos();
 696
 697         DEBUG(10, ("smbacl4_win2nfs4 invoked\n"));
 698
 699         theacl = smb_create_smb4acl();
 700         if (theacl==NULL)
 701                 return NULL;
 702
 703         for(i=0; i<dacl->num_aces; i++) {
 704                 SMB_ACE4PROP_T  ace_v4;
 705                 bool    addNewACE = True;
 706
 707                 if (!smbacl4_fill_ace4(mem_ctx, filename, pparams,
 708                                        ownerUID, ownerGID,
 709                                        dacl->aces + i, &ace_v4)) {
 710                         DEBUG(3, ("Could not fill ace for file %s, SID %s\n",
 711                                   filename,
 712                                   sid_string_dbg(&((dacl->aces+i)->trustee))));
 713                         continue;
 714                 }
 715
 716                 if (pparams->acedup!=e_dontcare) {
 717                         if (smbacl4_MergeIgnoreReject(pparams->acedup, theacl,
 718                                 &ace_v4, &addNewACE, i))
 719                                 return NULL;
 720                 }
 721
 722                 if (addNewACE)
 723                         smb_add_ace4(theacl, &ace_v4);
 724         }
 725
 726         return theacl;
 727 }
 728
 729 NTSTATUS smb_set_nt_acl_nfs4(files_struct *fsp,
 730         uint32 security_info_sent,
 731         const struct security_descriptor *psd,
 732         set_nfs4acl_native_fn_t set_nfs4_native)
 733 {
 734         smbacl4_vfs_params params;
 735         SMB4ACL_T *theacl = NULL;
 736         bool    result;
 737
 738         SMB_STRUCT_STAT sbuf;
 739         bool set_acl_as_root = false;
 740         uid_t newUID = (uid_t)-1;
 741         gid_t newGID = (gid_t)-1;
 742         int saved_errno;
 743
 744         DEBUG(10, ("smb_set_nt_acl_nfs4 invoked for %s\n", fsp_str_dbg(fsp)));
 745
 746         if ((security_info_sent & (SECINFO_DACL |
 747                 SECINFO_GROUP | SECINFO_OWNER)) == 0)
 748         {
 749                 DEBUG(9, ("security_info_sent (0x%x) ignored\n",
 750                         security_info_sent));
 751                 return NT_STATUS_OK; /* won't show error - later to be refined... */
 752         }
 753
 754         /* Special behaviours */
 755         if (smbacl4_get_vfs_params(SMBACL4_PARAM_TYPE_NAME, fsp, &params))
 756                 return NT_STATUS_NO_MEMORY;
 757
 758         if (smbacl4_fGetFileOwner(fsp, &sbuf))
 759                 return map_nt_error_from_unix(errno);
 760
 761         if (params.do_chown) {
 762                 /* chown logic is a copy/paste from posix_acl.c:set_nt_acl */
 763                 NTSTATUS status = unpack_nt_owners(fsp->conn, &newUID, &newGID, security_info_sent, psd);
 764                 if (!NT_STATUS_IS_OK(status)) {
 765                         DEBUG(8, ("unpack_nt_owners failed"));
 766                         return status;
 767                 }
 768                 if (((newUID != (uid_t)-1) && (sbuf.st_ex_uid != newUID)) ||
 769                     ((newGID != (gid_t)-1) && (sbuf.st_ex_gid != newGID))) {
 770
 771                         status = try_chown(fsp, newUID, newGID);
 772                         if (!NT_STATUS_IS_OK(status)) {
 773                                 DEBUG(3,("chown %s, %u, %u failed. Error = "
 774                                          "%s.\n", fsp_str_dbg(fsp),
 775                                          (unsigned int)newUID,
 776                                          (unsigned int)newGID,
 777                                          nt_errstr(status)));
 778                                 return status;
 779                         }
 780
 781                         DEBUG(10,("chown %s, %u, %u succeeded.\n",
 782                                   fsp_str_dbg(fsp), (unsigned int)newUID,
 783                                   (unsigned int)newGID));
 784                         if (smbacl4_GetFileOwner(fsp->conn,
 785                                                  fsp->fsp_name->base_name,
 786                                                  &sbuf))
 787                                 return map_nt_error_from_unix(errno);
 788
 789                         /* If we successfully chowned, we know we must
 790                          * be able to set the acl, so do it as root.
 791                          */
 792                         set_acl_as_root = true;
 793                 }
 794         }
 795
 796         if (!(security_info_sent & SECINFO_DACL) || psd->dacl ==NULL) {
 797                 DEBUG(10, ("no dacl found; security_info_sent = 0x%x\n", security_info_sent));
 798                 return NT_STATUS_OK;
 799         }
 800
 801         theacl = smbacl4_win2nfs4(fsp->fsp_name->base_name, psd->dacl, &params,
 802                                   sbuf.st_ex_uid, sbuf.st_ex_gid);
 803         if (!theacl)
 804                 return map_nt_error_from_unix(errno);
 805
 806         smbacl4_dump_nfs4acl(10, theacl);
 807
 808         if (set_acl_as_root) {
 809                 become_root();
 810         }
 811         result = set_nfs4_native(fsp, theacl);
 812         saved_errno = errno;
 813         if (set_acl_as_root) {
 814                 unbecome_root();
 815         }
 816         if (result!=True) {
 817                 errno = saved_errno;
 818                 DEBUG(10, ("set_nfs4_native failed with %s\n", strerror(errno)));
 819                 return map_nt_error_from_unix(errno);
 820         }
 821
 822         DEBUG(10, ("smb_set_nt_acl_nfs4 succeeded\n"));
 823         return NT_STATUS_OK;
 824 }