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 #define SMBACL4_PARAM_TYPE_NAME "nfs4"
  24
  25 #define SMB_ACE4_INT_MAGIC 0x76F8A967
  26 typedef struct _SMB_ACE4_INT_T
  27 {
  28         uint32  magic;
  29         SMB_ACE4PROP_T  prop;
  30         void    *next;
  31 } SMB_ACE4_INT_T;
  32
  33 #define SMB_ACL4_INT_MAGIC 0x29A3E792
  34 typedef struct _SMB_ACL4_INT_T
  35 {
  36         uint32  magic;
  37         uint32  naces;
  38         SMB_ACE4_INT_T  *first;
  39         SMB_ACE4_INT_T  *last;
  40 } SMB_ACL4_INT_T;
  41
  42 extern struct current_user current_user;
  43 extern int try_chown(connection_struct *conn, const char *fname, uid_t uid, gid_t gid);
  44 extern NTSTATUS unpack_nt_owners(int snum, uid_t *puser, gid_t *pgrp,
  45         uint32 security_info_sent, SEC_DESC *psd);
  46
  47 static SMB_ACL4_INT_T *get_validated_aclint(SMB4ACL_T *acl)
  48 {
  49         SMB_ACL4_INT_T *aclint = (SMB_ACL4_INT_T *)acl;
  50         if (acl==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  *acl = (SMB_ACL4_INT_T *)TALLOC_ZERO_SIZE(mem_ctx, sizeof(SMB_ACL4_INT_T));
  87         if (acl==NULL)
  88         {
  89                 DEBUG(0, ("TALLOC_SIZE failed\n"));
  90                 errno = ENOMEM;
  91                 return NULL;
  92         }
  93         acl->magic = SMB_ACL4_INT_MAGIC;
  94         /* acl->first, last = NULL not needed */
  95         return (SMB4ACL_T *)acl;
  96 }
  97
  98 SMB4ACE_T *smb_add_ace4(SMB4ACL_T *acl, SMB_ACE4PROP_T *prop)
  99 {
 100         SMB_ACL4_INT_T *aclint = get_validated_aclint(acl);
 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 *acl)
 147 {
 148         SMB_ACL4_INT_T *aclint = get_validated_aclint(acl);
 149         if (aclint==NULL)
 150                 return NULL;
 151
 152         return (SMB4ACE_T *)aclint->first;
 153 }
 154
 155 uint32 smb_get_naces(SMB4ACL_T *acl)
 156 {
 157         SMB_ACL4_INT_T *aclint = get_validated_aclint(acl);
 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 (SMB_VFS_STAT(conn, filename, psbuf) != 0)
 172         {
 173                 DEBUG(8, ("SMB_VFS_STAT failed with error %s\n",
 174                         strerror(errno)));
 175                 return -1;
 176         }
 177
 178         return 0;
 179 }
 180
 181 static int smbacl4_fGetFileOwner(files_struct *fsp, SMB_STRUCT_STAT *psbuf)
 182 {
 183         memset(psbuf, 0, sizeof(SMB_STRUCT_STAT));
 184
 185         if (fsp->is_directory || fsp->fh->fd == -1) {
 186                 return smbacl4_GetFileOwner(fsp->conn, fsp->fsp_name, psbuf);
 187         }
 188         if (SMB_VFS_FSTAT(fsp,fsp->fh->fd, psbuf) != 0)
 189         {
 190                 DEBUG(8, ("SMB_VFS_FSTAT failed with error %s\n",
 191                         strerror(errno)));
 192                 return -1;
 193         }
 194
 195         return 0;
 196 }
 197
 198 static bool smbacl4_nfs42win(TALLOC_CTX *mem_ctx, SMB4ACL_T *acl, /* in */
 199         DOM_SID *psid_owner, /* in */
 200         DOM_SID *psid_group, /* in */
 201         SEC_ACE **ppnt_ace_list, /* out */
 202         int *pgood_aces /* out */
 203 )
 204 {
 205         SMB_ACL4_INT_T *aclint = (SMB_ACL4_INT_T *)acl;
 206         SMB_ACE4_INT_T *aceint;
 207         SEC_ACE *nt_ace_list = NULL;
 208         int good_aces = 0;
 209
 210         DEBUG(10, ("smbacl_nfs42win entered"));
 211
 212         aclint = get_validated_aclint(acl);
 213         /* We do not check for naces being 0 or acl being NULL here because it is done upstream */
 214         /* in smb_get_nt_acl_nfs4(). */
 215         nt_ace_list = (SEC_ACE *)TALLOC_ZERO_SIZE(mem_ctx, aclint->naces * sizeof(SEC_ACE));
 216         if (nt_ace_list==NULL)
 217         {
 218                 DEBUG(10, ("talloc error"));
 219                 errno = ENOMEM;
 220                 return False;
 221         }
 222
 223         for (aceint=aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
 224                 SEC_ACCESS mask;
 225                 DOM_SID sid;
 226                 SMB_ACE4PROP_T  *ace = &aceint->prop;
 227
 228                 DEBUG(10, ("magic: 0x%x, type: %d, iflags: %x, flags: %x, mask: %x, "
 229                         "who: %d\n", aceint->magic, ace->aceType, ace->flags,
 230                         ace->aceFlags, ace->aceMask, ace->who.id));
 231
 232                 SMB_ASSERT(aceint->magic==SMB_ACE4_INT_MAGIC);
 233
 234                 if (ace->flags & SMB_ACE4_ID_SPECIAL) {
 235                         switch (ace->who.special_id) {
 236                         case SMB_ACE4_WHO_OWNER:
 237                                 sid_copy(&sid, psid_owner);
 238                                 break;
 239                         case SMB_ACE4_WHO_GROUP:
 240                                 sid_copy(&sid, psid_group);
 241                                 break;
 242                         case SMB_ACE4_WHO_EVERYONE:
 243                                 sid_copy(&sid, &global_sid_World);
 244                                 break;
 245                         default:
 246                                 DEBUG(8, ("invalid special who id %d "
 247                                         "ignored\n", ace->who.special_id));
 248                         }
 249                 } else {
 250                         if (ace->aceFlags & SMB_ACE4_IDENTIFIER_GROUP) {
 251                                 gid_to_sid(&sid, ace->who.gid);
 252                         } else {
 253                                 uid_to_sid(&sid, ace->who.uid);
 254                         }
 255                 }
 256                 DEBUG(10, ("mapped %d to %s\n", ace->who.id,
 257                            sid_string_dbg(&sid)));
 258
 259                 init_sec_access(&mask, ace->aceMask);
 260                 init_sec_ace(&nt_ace_list[good_aces++], &sid,
 261                         ace->aceType, mask,
 262                         ace->aceFlags & 0xf);
 263         }
 264
 265         *ppnt_ace_list = nt_ace_list;
 266         *pgood_aces = good_aces;
 267
 268         return True;
 269 }
 270
 271 NTSTATUS smb_get_nt_acl_nfs4(files_struct *fsp,
 272         uint32 security_info,
 273         SEC_DESC **ppdesc, SMB4ACL_T *acl)
 274 {
 275         int     good_aces = 0;
 276         SMB_STRUCT_STAT sbuf;
 277         DOM_SID sid_owner, sid_group;
 278         size_t sd_size = 0;
 279         SEC_ACE *nt_ace_list = NULL;
 280         SEC_ACL *psa = NULL;
 281         TALLOC_CTX *mem_ctx = talloc_tos();
 282
 283         DEBUG(10, ("smb_get_nt_acl_nfs4 invoked for %s\n", fsp->fsp_name));
 284
 285         if (acl==NULL || smb_get_naces(acl)==0)
 286                 return NT_STATUS_ACCESS_DENIED; /* special because we
 287                                                  * shouldn't alloc 0 for
 288                                                  * win */
 289
 290         if (smbacl4_fGetFileOwner(fsp, &sbuf))
 291                 return map_nt_error_from_unix(errno);
 292         uid_to_sid(&sid_owner, sbuf.st_uid);
 293         gid_to_sid(&sid_group, sbuf.st_gid);
 294
 295         if (smbacl4_nfs42win(mem_ctx, acl, &sid_owner, &sid_group, &nt_ace_list, &good_aces)==False) {
 296                 DEBUG(8,("smbacl4_nfs42win failed\n"));
 297                 return map_nt_error_from_unix(errno);
 298         }
 299
 300         psa = make_sec_acl(mem_ctx, NT4_ACL_REVISION, good_aces, nt_ace_list);
 301         if (psa == NULL) {
 302                 DEBUG(2,("make_sec_acl failed\n"));
 303                 return NT_STATUS_NO_MEMORY;
 304         }
 305
 306         DEBUG(10,("after make sec_acl\n"));
 307         *ppdesc = make_sec_desc(mem_ctx, SEC_DESC_REVISION, SEC_DESC_SELF_RELATIVE,
 308                                 (security_info & OWNER_SECURITY_INFORMATION) ? &sid_owner : NULL,
 309                                 (security_info & GROUP_SECURITY_INFORMATION) ? &sid_group : NULL,
 310                                 NULL, psa, &sd_size);
 311         if (*ppdesc==NULL) {
 312                 DEBUG(2,("make_sec_desc failed\n"));
 313                 return NT_STATUS_NO_MEMORY;
 314         }
 315
 316         DEBUG(10, ("smb_get_nt_acl_nfs4 successfully exited with sd_size %d\n",
 317                    sec_desc_size(*ppdesc)));
 318
 319         return NT_STATUS_OK;
 320 }
 321
 322 enum smbacl4_mode_enum {e_simple=0, e_special=1};
 323 enum smbacl4_acedup_enum {e_dontcare=0, e_reject=1, e_ignore=2, e_merge=3};
 324
 325 typedef struct _smbacl4_vfs_params {
 326         enum smbacl4_mode_enum mode;
 327         bool do_chown;
 328         enum smbacl4_acedup_enum acedup;
 329 } smbacl4_vfs_params;
 330
 331 /*
 332  * Gather special parameters for NFS4 ACL handling
 333  */
 334 static int smbacl4_get_vfs_params(
 335         const char *type_name,
 336         files_struct *fsp,
 337         smbacl4_vfs_params *params
 338 )
 339 {
 340         static const struct enum_list enum_smbacl4_modes[] = {
 341                 { e_simple, "simple" },
 342                 { e_special, "special" }
 343         };
 344         static const struct enum_list enum_smbacl4_acedups[] = {
 345                 { e_dontcare, "dontcare" },
 346                 { e_reject, "reject" },
 347                 { e_ignore, "ignore" },
 348                 { e_merge, "merge" },
 349         };
 350
 351         memset(params, 0, sizeof(smbacl4_vfs_params));
 352         params->mode = (enum smbacl4_mode_enum)lp_parm_enum(
 353                 SNUM(fsp->conn), type_name,
 354                 "mode", enum_smbacl4_modes, e_simple);
 355         params->do_chown = lp_parm_bool(SNUM(fsp->conn), type_name,
 356                 "chown", True);
 357         params->acedup = (enum smbacl4_acedup_enum)lp_parm_enum(
 358                 SNUM(fsp->conn), type_name,
 359                 "acedup", enum_smbacl4_acedups, e_dontcare);
 360
 361         DEBUG(10, ("mode:%s, do_chown:%s, acedup: %s\n",
 362                 enum_smbacl4_modes[params->mode].name,
 363                 params->do_chown ? "true" : "false",
 364                 enum_smbacl4_acedups[params->acedup].name));
 365
 366         return 0;
 367 }
 368
 369 static void smbacl4_dump_nfs4acl(int level, SMB4ACL_T *acl)
 370 {
 371         SMB_ACL4_INT_T *aclint = get_validated_aclint(acl);
 372         SMB_ACE4_INT_T *aceint;
 373
 374         DEBUG(level, ("NFS4ACL: size=%d\n", aclint->naces));
 375
 376         for(aceint = aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
 377                 SMB_ACE4PROP_T *ace = &aceint->prop;
 378
 379                 DEBUG(level, ("\tACE: type=%d, flags=0x%x, fflags=0x%x, mask=0x%x, id=%d\n",
 380                         ace->aceType,
 381                         ace->aceFlags, ace->flags,
 382                         ace->aceMask,
 383                         ace->who.id));
 384         }
 385 }
 386
 387 /*
 388  * Find 2 NFS4 who-special ACE property (non-copy!!!)
 389  * match nonzero if "special" and who is equal
 390  * return ace if found matching; otherwise NULL
 391  */
 392 static SMB_ACE4PROP_T *smbacl4_find_equal_special(
 393         SMB4ACL_T *acl,
 394         SMB_ACE4PROP_T *aceNew)
 395 {
 396         SMB_ACL4_INT_T *aclint = get_validated_aclint(acl);
 397         SMB_ACE4_INT_T *aceint;
 398
 399         for(aceint = aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
 400                 SMB_ACE4PROP_T *ace = &aceint->prop;
 401
 402                 if (ace->flags == aceNew->flags &&
 403                         ace->aceType==aceNew->aceType &&
 404                         (ace->aceFlags&SMB_ACE4_IDENTIFIER_GROUP)==
 405                         (aceNew->aceFlags&SMB_ACE4_IDENTIFIER_GROUP)
 406                 ) {
 407                         /* keep type safety; e.g. gid is an u.short */
 408                         if (ace->flags & SMB_ACE4_ID_SPECIAL)
 409                         {
 410                                 if (ace->who.special_id==aceNew->who.special_id)
 411                                         return ace;
 412                         } else {
 413                                 if (ace->aceFlags & SMB_ACE4_IDENTIFIER_GROUP)
 414                                 {
 415                                         if (ace->who.gid==aceNew->who.gid)
 416                                                 return ace;
 417                                 } else {
 418                                         if (ace->who.uid==aceNew->who.uid)
 419                                                 return ace;
 420                                 }
 421                         }
 422                 }
 423         }
 424
 425         return NULL;
 426 }
 427
 428 static int smbacl4_fill_ace4(
 429         TALLOC_CTX *mem_ctx,
 430         smbacl4_vfs_params *params,
 431         uid_t ownerUID,
 432         gid_t ownerGID,
 433         SEC_ACE *ace_nt, /* input */
 434         SMB_ACE4PROP_T *ace_v4 /* output */
 435 )
 436 {
 437         const char *dom, *name;
 438         enum lsa_SidType type;
 439         uid_t uid;
 440         gid_t gid;
 441
 442         DEBUG(10, ("got ace for %s\n", sid_string_dbg(&ace_nt->trustee)));
 443
 444         memset(ace_v4, 0, sizeof(SMB_ACE4PROP_T));
 445         ace_v4->aceType = ace_nt->type; /* only ACCESS|DENY supported right now */
 446         ace_v4->aceFlags = ace_nt->flags & SEC_ACE_FLAG_VALID_INHERIT;
 447         ace_v4->aceMask = ace_nt->access_mask &
 448                 (STD_RIGHT_ALL_ACCESS | SA_RIGHT_FILE_ALL_ACCESS);
 449
 450         if (ace_v4->aceFlags!=ace_nt->flags)
 451                 DEBUG(9, ("ace_v4->aceFlags(0x%x)!=ace_nt->flags(0x%x)\n",
 452                         ace_v4->aceFlags, ace_nt->flags));
 453
 454         if (ace_v4->aceMask!=ace_nt->access_mask)
 455                 DEBUG(9, ("ace_v4->aceMask(0x%x)!=ace_nt->access_mask(0x%x)\n",
 456                         ace_v4->aceMask, ace_nt->access_mask));
 457
 458         if (sid_equal(&ace_nt->trustee, &global_sid_World)) {
 459                 ace_v4->who.special_id = SMB_ACE4_WHO_EVERYONE;
 460                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
 461         } else {
 462                 if (!lookup_sid(mem_ctx, &ace_nt->trustee, &dom, &name, &type)) {
 463                         DEBUG(8, ("Could not find %s' type\n",
 464                                   sid_string_dbg(&ace_nt->trustee)));
 465                         errno = EINVAL;
 466                         return -1;
 467                 }
 468
 469                 if (type == SID_NAME_USER) {
 470                         if (!sid_to_uid(&ace_nt->trustee, &uid)) {
 471                                 DEBUG(2, ("Could not convert %s to uid\n",
 472                                           sid_string_dbg(&ace_nt->trustee)));
 473                                 return -1;
 474                         }
 475
 476                         if (params->mode==e_special && uid==ownerUID) {
 477                                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
 478                                 ace_v4->who.special_id = SMB_ACE4_WHO_OWNER;
 479                         } else {
 480                                 ace_v4->who.uid = uid;
 481                         }
 482                 } else { /* else group? - TODO check it... */
 483                         if (!sid_to_gid(&ace_nt->trustee, &gid)) {
 484                                 DEBUG(2, ("Could not convert %s to gid\n",
 485                                           sid_string_dbg(&ace_nt->trustee)));
 486                                 return -1;
 487                         }
 488                         ace_v4->aceFlags |= SMB_ACE4_IDENTIFIER_GROUP;
 489
 490                         if (params->mode==e_special && gid==ownerGID) {
 491                                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
 492                                 ace_v4->who.special_id = SMB_ACE4_WHO_GROUP;
 493                         } else {
 494                                 ace_v4->who.gid = gid;
 495                         }
 496                 }
 497         }
 498
 499         return 0; /* OK */
 500 }
 501
 502 static int smbacl4_MergeIgnoreReject(
 503         enum smbacl4_acedup_enum acedup,
 504         SMB4ACL_T *acl, /* may modify it */
 505         SMB_ACE4PROP_T *ace, /* the "new" ACE */
 506         bool    *paddNewACE,
 507         int     i
 508 )
 509 {
 510         int     result = 0;
 511         SMB_ACE4PROP_T *ace4found = smbacl4_find_equal_special(acl, ace);
 512         if (ace4found)
 513         {
 514                 switch(acedup)
 515                 {
 516                 case e_merge: /* "merge" flags */
 517                         *paddNewACE = False;
 518                         ace4found->aceFlags |= ace->aceFlags;
 519                         ace4found->aceMask |= ace->aceMask;
 520                         break;
 521                 case e_ignore: /* leave out this record */
 522                         *paddNewACE = False;
 523                         break;
 524                 case e_reject: /* do an error */
 525                         DEBUG(8, ("ACL rejected by duplicate nt ace#%d\n", i));
 526                         errno = EINVAL; /* SHOULD be set on any _real_ error */
 527                         result = -1;
 528                         break;
 529                 default:
 530                         break;
 531                 }
 532         }
 533         return result;
 534 }
 535
 536 static SMB4ACL_T *smbacl4_win2nfs4(
 537         SEC_ACL *dacl,
 538         smbacl4_vfs_params *pparams,
 539         uid_t ownerUID,
 540         gid_t ownerGID
 541 )
 542 {
 543         SMB4ACL_T *acl;
 544         uint32  i;
 545         TALLOC_CTX *mem_ctx = talloc_tos();
 546
 547         DEBUG(10, ("smbacl4_win2nfs4 invoked\n"));
 548
 549         acl = smb_create_smb4acl();
 550         if (acl==NULL)
 551                 return NULL;
 552
 553         for(i=0; i<dacl->num_aces; i++) {
 554                 SMB_ACE4PROP_T  ace_v4;
 555                 bool    addNewACE = True;
 556
 557                 if (smbacl4_fill_ace4(mem_ctx, pparams, ownerUID, ownerGID,
 558                         dacl->aces + i, &ace_v4))
 559                         return NULL;
 560
 561                 if (pparams->acedup!=e_dontcare) {
 562                         if (smbacl4_MergeIgnoreReject(pparams->acedup, acl,
 563                                 &ace_v4, &addNewACE, i))
 564                                 return NULL;
 565                 }
 566
 567                 if (addNewACE)
 568                         smb_add_ace4(acl, &ace_v4);
 569         }
 570
 571         return acl;
 572 }
 573
 574 NTSTATUS smb_set_nt_acl_nfs4(files_struct *fsp,
 575         uint32 security_info_sent,
 576         SEC_DESC *psd,
 577         set_nfs4acl_native_fn_t set_nfs4_native)
 578 {
 579         smbacl4_vfs_params params;
 580         SMB4ACL_T *acl = NULL;
 581         bool    result;
 582
 583         SMB_STRUCT_STAT sbuf;
 584         uid_t newUID = (uid_t)-1;
 585         gid_t newGID = (gid_t)-1;
 586
 587         DEBUG(10, ("smb_set_nt_acl_nfs4 invoked for %s\n", fsp->fsp_name));
 588
 589         if ((security_info_sent & (DACL_SECURITY_INFORMATION |
 590                 GROUP_SECURITY_INFORMATION | OWNER_SECURITY_INFORMATION)) == 0)
 591         {
 592                 DEBUG(9, ("security_info_sent (0x%x) ignored\n",
 593                         security_info_sent));
 594                 return NT_STATUS_OK; /* won't show error - later to be refined... */
 595         }
 596
 597         /* Special behaviours */
 598         if (smbacl4_get_vfs_params(SMBACL4_PARAM_TYPE_NAME, fsp, &params))
 599                 return NT_STATUS_NO_MEMORY;
 600
 601         if (smbacl4_fGetFileOwner(fsp, &sbuf))
 602                 return map_nt_error_from_unix(errno);
 603
 604         if (params.do_chown) {
 605                 /* chown logic is a copy/paste from posix_acl.c:set_nt_acl */
 606                 NTSTATUS status = unpack_nt_owners(SNUM(fsp->conn), &newUID, &newGID, security_info_sent, psd);
 607                 if (!NT_STATUS_IS_OK(status)) {
 608                         DEBUG(8, ("unpack_nt_owners failed"));
 609                         return status;
 610                 }
 611                 if (((newUID != (uid_t)-1) && (sbuf.st_uid != newUID)) ||
 612                                 ((newGID != (gid_t)-1) && (sbuf.st_gid != newGID))) {
 613                         if(try_chown(fsp->conn, fsp->fsp_name, newUID, newGID)) {
 614                                 DEBUG(3,("chown %s, %u, %u failed. Error = %s.\n",
 615                                         fsp->fsp_name, (unsigned int)newUID, (unsigned int)newGID, strerror(errno) ));
 616                                 if (errno == EPERM) {
 617                                         return NT_STATUS_INVALID_OWNER;
 618                                 }
 619                                 return map_nt_error_from_unix(errno);
 620                         }
 621                         DEBUG(10,("chown %s, %u, %u succeeded.\n",
 622                                 fsp->fsp_name, (unsigned int)newUID, (unsigned int)newGID));
 623                         if (smbacl4_fGetFileOwner(fsp, &sbuf))
 624                                 return map_nt_error_from_unix(errno);
 625                 }
 626         }
 627
 628         if ((security_info_sent & DACL_SECURITY_INFORMATION)!=0 && psd->dacl!=NULL)
 629         {
 630                 acl = smbacl4_win2nfs4(psd->dacl, &params, sbuf.st_uid, sbuf.st_gid);
 631                 if (!acl)
 632                         return map_nt_error_from_unix(errno);
 633
 634                 smbacl4_dump_nfs4acl(10, acl);
 635
 636                 result = set_nfs4_native(fsp, acl);
 637                 if (result!=True)
 638                 {
 639                         DEBUG(10, ("set_nfs4_native failed with %s\n", strerror(errno)));
 640                         return map_nt_error_from_unix(errno);
 641                 }
 642         } else
 643                 DEBUG(10, ("no dacl found; security_info_sent = 0x%x\n", security_info_sent));
 644
 645         DEBUG(10, ("smb_set_nt_acl_nfs4 succeeded\n"));
 646         return NT_STATUS_OK;
 647 }