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 2 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, write to the Free Software
  18  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19  */
  20
  21 #include "includes.h"
  22 #include "nfs4_acls.h"
  23
  24 #define SMBACL4_PARAM_TYPE_NAME "nfs4"
  25
  26 #define SMB_ACE4_INT_MAGIC 0x76F8A967
  27 typedef struct _SMB_ACE4_INT_T
  28 {
  29         uint32  magic;
  30         SMB_ACE4PROP_T  prop;
  31         void    *next;
  32 } SMB_ACE4_INT_T;
  33
  34 #define SMB_ACL4_INT_MAGIC 0x29A3E792
  35 typedef struct _SMB_ACL4_INT_T
  36 {
  37         uint32  magic;
  38         uint32  naces;
  39         SMB_ACE4_INT_T  *first;
  40         SMB_ACE4_INT_T  *last;
  41 } SMB_ACL4_INT_T;
  42
  43 extern struct current_user current_user;
  44 extern int try_chown(connection_struct *conn, const char *fname, uid_t uid, gid_t gid);
  45 extern BOOL unpack_nt_owners(int snum, uid_t *puser, gid_t *pgrp,
  46         uint32 security_info_sent, SEC_DESC *psd);
  47
  48 static SMB_ACL4_INT_T *get_validated_aclint(SMB4ACL_T *acl)
  49 {
  50         SMB_ACL4_INT_T *aclint = (SMB_ACL4_INT_T *)acl;
  51         if (acl==NULL)
  52         {
  53                 DEBUG(2, ("acl is NULL\n"));
  54                 errno = EINVAL;
  55                 return NULL;
  56         }
  57         if (aclint->magic!=SMB_ACL4_INT_MAGIC)
  58         {
  59                 DEBUG(2, ("aclint bad magic 0x%x\n", aclint->magic));
  60                 errno = EINVAL;
  61                 return NULL;
  62         }
  63         return aclint;
  64 }
  65
  66 static SMB_ACE4_INT_T *get_validated_aceint(SMB4ACE_T *ace)
  67 {
  68         SMB_ACE4_INT_T *aceint = (SMB_ACE4_INT_T *)ace;
  69         if (ace==NULL)
  70         {
  71                 DEBUG(2, ("ace is NULL\n"));
  72                 errno = EINVAL;
  73                 return NULL;
  74         }
  75         if (aceint->magic!=SMB_ACE4_INT_MAGIC)
  76         {
  77                 DEBUG(2, ("aceint bad magic 0x%x\n", aceint->magic));
  78                 errno = EINVAL;
  79                 return NULL;
  80         }
  81         return aceint;
  82 }
  83
  84 SMB4ACL_T *smb_create_smb4acl(void)
  85 {
  86         TALLOC_CTX *mem_ctx = main_loop_talloc_get();
  87         SMB_ACL4_INT_T  *acl = (SMB_ACL4_INT_T *)TALLOC_SIZE(mem_ctx, sizeof(SMB_ACL4_INT_T));
  88         if (acl==NULL)
  89         {
  90                 DEBUG(0, ("TALLOC_SIZE failed\n"));
  91                 errno = ENOMEM;
  92                 return NULL;
  93         }
  94         memset(acl, 0, sizeof(SMB_ACL4_INT_T));
  95         acl->magic = SMB_ACL4_INT_MAGIC;
  96         /* acl->first, last = NULL not needed */
  97         return (SMB4ACL_T *)acl;
  98 }
  99
 100 SMB4ACE_T *smb_add_ace4(SMB4ACL_T *acl, SMB_ACE4PROP_T *prop)
 101 {
 102         SMB_ACL4_INT_T *aclint = get_validated_aclint(acl);
 103         TALLOC_CTX *mem_ctx = main_loop_talloc_get();
 104         SMB_ACE4_INT_T *ace;
 105
 106         ace = (SMB_ACE4_INT_T *)TALLOC_SIZE(mem_ctx, sizeof(SMB_ACE4_INT_T));
 107         if (ace==NULL)
 108         {
 109                 DEBUG(0, ("TALLOC_SIZE failed\n"));
 110                 errno = ENOMEM;
 111                 return NULL;
 112         }
 113         memset(ace, 0, sizeof(SMB_ACE4_INT_T));
 114         ace->magic = SMB_ACE4_INT_MAGIC;
 115         /* ace->next = NULL not needed */
 116         memcpy(&ace->prop, prop, sizeof(SMB_ACE4PROP_T));
 117
 118         if (aclint->first==NULL)
 119         {
 120                 aclint->first = ace;
 121                 aclint->last = ace;
 122         } else {
 123                 aclint->last->next = (void *)ace;
 124                 aclint->last = ace;
 125         }
 126         aclint->naces++;
 127
 128         return (SMB4ACE_T *)ace;
 129 }
 130
 131 SMB_ACE4PROP_T *smb_get_ace4(SMB4ACE_T *ace)
 132 {
 133         SMB_ACE4_INT_T *aceint = get_validated_aceint(ace);
 134         if (aceint==NULL)
 135                 return NULL;
 136
 137         return &aceint->prop;
 138 }
 139
 140 SMB4ACE_T *smb_next_ace4(SMB4ACE_T *ace)
 141 {
 142         SMB_ACE4_INT_T *aceint = get_validated_aceint(ace);
 143         if (aceint==NULL)
 144                 return NULL;
 145
 146         return (SMB4ACE_T *)aceint->next;
 147 }
 148
 149 SMB4ACE_T *smb_first_ace4(SMB4ACL_T *acl)
 150 {
 151         SMB_ACL4_INT_T *aclint = get_validated_aclint(acl);
 152         if (aclint==NULL)
 153                 return NULL;
 154
 155         return (SMB4ACE_T *)aclint->first;
 156 }
 157
 158 uint32 smb_get_naces(SMB4ACL_T *acl)
 159 {
 160         SMB_ACL4_INT_T *aclint = get_validated_aclint(acl);
 161         if (aclint==NULL)
 162                 return 0;
 163
 164         return aclint->naces;
 165 }
 166
 167 static int smbacl4_GetFileOwner(files_struct *fsp, SMB_STRUCT_STAT *psbuf)
 168 {
 169         memset(psbuf, 0, sizeof(SMB_STRUCT_STAT));
 170         if (fsp->is_directory || fsp->fh->fd == -1) {
 171                 /* Get the stat struct for the owner info. */
 172                 if (SMB_VFS_STAT(fsp->conn,fsp->fsp_name, psbuf) != 0)
 173                 {
 174                         DEBUG(8, ("SMB_VFS_STAT failed with error %s\n",
 175                                 strerror(errno)));
 176                         return -1;
 177                 }
 178         } else {
 179                 if (SMB_VFS_FSTAT(fsp,fsp->fh->fd, psbuf) != 0)
 180                 {
 181                         DEBUG(8, ("SMB_VFS_FSTAT failed with error %s\n",
 182                                 strerror(errno)));
 183                         return -1;
 184                 }
 185         }
 186
 187         return 0;
 188 }
 189
 190 static BOOL smbacl4_nfs42win(SMB4ACL_T *acl, /* in */
 191         DOM_SID *psid_owner, /* in */
 192         DOM_SID *psid_group, /* in */
 193         SEC_ACE **ppnt_ace_list, /* out */
 194         int *pgood_aces /* out */
 195 )
 196 {
 197         SMB_ACL4_INT_T *aclint = (SMB_ACL4_INT_T *)acl;
 198         SMB_ACE4_INT_T *aceint;
 199         SEC_ACE *nt_ace_list = NULL;
 200         int good_aces = 0;
 201         TALLOC_CTX *mem_ctx = main_loop_talloc_get();
 202
 203         DEBUG(10, ("smbacl_nfs42win entered"));
 204
 205         aclint = get_validated_aclint(acl);
 206         if (aclint==NULL)
 207                 return False;
 208
 209         if (aclint->naces) {
 210                 nt_ace_list = (SEC_ACE *)TALLOC_SIZE(mem_ctx, aclint->naces * sizeof(SEC_ACE));
 211                 if (nt_ace_list==NULL)
 212                 {
 213                         DEBUG(10, ("talloc error"));
 214                         errno = ENOMEM;
 215                         return False;
 216                 }
 217                 memset(nt_ace_list, 0, aclint->naces * sizeof(SEC_ACE));
 218         } else {
 219                 nt_ace_list = NULL;
 220         }
 221
 222         for (aceint=aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
 223                 SEC_ACCESS mask;
 224                 DOM_SID sid;
 225                 SMB_ACE4PROP_T  *ace = &aceint->prop;
 226
 227                 DEBUG(10, ("magic: 0x%x, type: %d, iflags: %x, flags: %x, mask: %x, "
 228                         "who: %d\n", aceint->magic, ace->aceType, ace->flags,
 229                         ace->aceFlags, ace->aceMask, ace->who.id));
 230
 231                 SMB_ASSERT(aceint->magic==SMB_ACE4_INT_MAGIC);
 232
 233                 if (ace->flags & SMB_ACE4_ID_SPECIAL) {
 234                         switch (ace->who.special_id) {
 235                         case SMB_ACE4_WHO_OWNER:
 236                                 sid_copy(&sid, psid_owner);
 237                                 break;
 238                         case SMB_ACE4_WHO_GROUP:
 239                                 sid_copy(&sid, psid_group);
 240                                 break;
 241                         case SMB_ACE4_WHO_EVERYONE:
 242                                 sid_copy(&sid, &global_sid_World);
 243                                 break;
 244                         default:
 245                                 DEBUG(8, ("invalid special who id %d "
 246                                         "ignored\n", ace->who.special_id));
 247                         }
 248                 } else {
 249                         if (ace->aceFlags & SMB_ACE4_IDENTIFIER_GROUP) {
 250                                 gid_to_sid(&sid, ace->who.gid);
 251                         } else {
 252                                 uid_to_sid(&sid, ace->who.uid);
 253                         }
 254                 }
 255                 DEBUG(10, ("mapped %d to %s\n", ace->who.id,
 256                         sid_string_static(&sid)));
 257
 258                 init_sec_access(&mask, ace->aceMask);
 259                 init_sec_ace(&nt_ace_list[good_aces++], &sid,
 260                         ace->aceType, mask,
 261                         ace->aceFlags & 0xf);
 262         }
 263
 264         *ppnt_ace_list = nt_ace_list;
 265         *pgood_aces = good_aces;
 266
 267         return True;
 268 }
 269
 270 size_t smb_get_nt_acl_nfs4(files_struct *fsp,
 271         uint32 security_info,
 272         SEC_DESC **ppdesc, SMB4ACL_T *acl)
 273 {
 274         int     good_aces = 0;
 275         SMB_STRUCT_STAT sbuf;
 276         DOM_SID sid_owner, sid_group;
 277         size_t sd_size = 0;
 278         SEC_ACE *nt_ace_list = NULL;
 279         SEC_ACL *psa = NULL;
 280         TALLOC_CTX *mem_ctx = main_loop_talloc_get();
 281
 282         DEBUG(10, ("smb_get_nt_acl_nfs4 invoked for %s\n", fsp->fsp_name));
 283
 284         if (acl==NULL || smb_get_naces(acl)==0)
 285                 return 0; /* special because we shouldn't alloc 0 for win */
 286
 287         if (smbacl4_GetFileOwner(fsp, &sbuf))
 288                 return 0;
 289
 290         uid_to_sid(&sid_owner, sbuf.st_uid);
 291         gid_to_sid(&sid_group, sbuf.st_gid);
 292
 293         if (smbacl4_nfs42win(acl,
 294                 &sid_owner,
 295                 &sid_group,
 296                 &nt_ace_list,
 297                 &good_aces
 298                 )==False) {
 299                 DEBUG(8,("smbacl4_nfs42win failed\n"));
 300                 return 0;
 301         }
 302
 303         psa = make_sec_acl(mem_ctx, NT4_ACL_REVISION,
 304                 good_aces, nt_ace_list);
 305         if (psa == NULL) {
 306                 DEBUG(2,("make_sec_acl failed\n"));
 307                 return 0;
 308         }
 309
 310         DEBUG(10,("after make sec_acl\n"));
 311         *ppdesc = make_sec_desc(mem_ctx, SEC_DESC_REVISION,
 312                 SEC_DESC_SELF_RELATIVE,
 313                 (security_info & OWNER_SECURITY_INFORMATION)
 314                 ? &sid_owner : NULL,
 315                 (security_info & GROUP_SECURITY_INFORMATION)
 316                 ? &sid_group : NULL,
 317                 NULL, psa, &sd_size);
 318         if (*ppdesc==NULL) {
 319                 DEBUG(2,("make_sec_desc failed\n"));
 320                 return 0;
 321         }
 322
 323         DEBUG(10, ("smb_get_nt_acl_nfs4 successfully exited with sd_size %d\n", sd_size));
 324         return sd_size;
 325 }
 326
 327 enum smbacl4_mode_enum {e_simple=0, e_special=1};
 328 enum smbacl4_acedup_enum {e_dontcare=0, e_reject=1, e_ignore=2, e_merge=3};
 329
 330 typedef struct _smbacl4_vfs_params {
 331         enum smbacl4_mode_enum mode;
 332         BOOL do_chown;
 333         enum smbacl4_acedup_enum acedup;
 334 } smbacl4_vfs_params;
 335
 336 /*
 337  * Gather special parameters for NFS4 ACL handling
 338  */
 339 static int smbacl4_get_vfs_params(
 340         const char *type_name,
 341         files_struct *fsp,
 342         smbacl4_vfs_params *params
 343 )
 344 {
 345         static const struct enum_list enum_smbacl4_modes[] = {
 346                 { e_simple, "simple" },
 347                 { e_special, "special" }
 348         };
 349         static const struct enum_list enum_smbacl4_acedups[] = {
 350                 { e_dontcare, "dontcare" },
 351                 { e_reject, "reject" },
 352                 { e_ignore, "ignore" },
 353                 { e_merge, "merge" },
 354         };
 355
 356         memset(params, 0, sizeof(smbacl4_vfs_params));
 357         params->mode = (enum smbacl4_mode_enum)lp_parm_enum(
 358                 SNUM(fsp->conn), type_name,
 359                 "mode", enum_smbacl4_modes, e_simple);
 360         params->do_chown = lp_parm_bool(SNUM(fsp->conn), type_name,
 361                 "chown", True);
 362         params->acedup = (enum smbacl4_acedup_enum)lp_parm_enum(
 363                 SNUM(fsp->conn), type_name,
 364                 "acedup", enum_smbacl4_acedups, e_dontcare);
 365
 366         DEBUG(10, ("mode:%s, do_chown:%s, acedup: %s\n",
 367                 enum_smbacl4_modes[params->mode].name,
 368                 params->do_chown ? "true" : "false",
 369                 enum_smbacl4_acedups[params->acedup].name));
 370
 371         return 0;
 372 }
 373
 374 static void smbacl4_dump_nfs4acl(int level, SMB4ACL_T *acl)
 375 {
 376         SMB_ACL4_INT_T *aclint = get_validated_aclint(acl);
 377         SMB_ACE4_INT_T *aceint;
 378
 379         DEBUG(level, ("NFS4ACL: size=%d\n", aclint->naces));
 380
 381         for(aceint = aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
 382                 SMB_ACE4PROP_T *ace = &aceint->prop;
 383
 384                 DEBUG(level, ("\tACE: type=%d, flags=0x%x, fflags=0x%x, mask=0x%x, id=%d\n",
 385                         ace->aceType,
 386                         ace->aceFlags, ace->flags,
 387                         ace->aceMask,
 388                         ace->who.id));
 389         }
 390 }
 391
 392 /*
 393  * Find 2 NFS4 who-special ACE property (non-copy!!!)
 394  * match nonzero if "special" and who is equal
 395  * return ace if found matching; otherwise NULL
 396  */
 397 static SMB_ACE4PROP_T *smbacl4_find_equal_special(
 398         SMB4ACL_T *acl,
 399         SMB_ACE4PROP_T *aceNew)
 400 {
 401         SMB_ACL4_INT_T *aclint = get_validated_aclint(acl);
 402         SMB_ACE4_INT_T *aceint;
 403
 404         for(aceint = aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
 405                 SMB_ACE4PROP_T *ace = &aceint->prop;
 406
 407                 if (ace->flags == aceNew->flags &&
 408                         ace->aceType==aceNew->aceType &&
 409                         (ace->aceFlags&SMB_ACE4_IDENTIFIER_GROUP)==
 410                         (aceNew->aceFlags&SMB_ACE4_IDENTIFIER_GROUP)
 411                 ) {
 412                         /* keep type safety; e.g. gid is an u.short */
 413                         if (ace->flags & SMB_ACE4_ID_SPECIAL)
 414                         {
 415                                 if (ace->who.special_id==aceNew->who.special_id)
 416                                         return ace;
 417                         } else {
 418                                 if (ace->aceFlags & SMB_ACE4_IDENTIFIER_GROUP)
 419                                 {
 420                                         if (ace->who.gid==aceNew->who.gid)
 421                                                 return ace;
 422                                 } else {
 423                                         if (ace->who.uid==aceNew->who.uid)
 424                                                 return ace;
 425                                 }
 426                         }
 427                 }
 428         }
 429
 430         return NULL;
 431 }
 432
 433 static int smbacl4_fill_ace4(
 434         TALLOC_CTX *mem_ctx,
 435         smbacl4_vfs_params *params,
 436         uid_t ownerUID,
 437         gid_t ownerGID,
 438         SEC_ACE *ace_nt, /* input */
 439         SMB_ACE4PROP_T *ace_v4 /* output */
 440 )
 441 {
 442         const char *dom, *name;
 443         enum lsa_SidType type;
 444         uid_t uid;
 445         gid_t gid;
 446
 447         DEBUG(10, ("got ace for %s\n",
 448                 sid_string_static(&ace_nt->trustee)));
 449
 450         memset(ace_v4, 0, sizeof(SMB_ACE4PROP_T));
 451         ace_v4->aceType = ace_nt->type; /* only ACCES|DENY supported right now */
 452         ace_v4->aceFlags = ace_nt->flags & SEC_ACE_FLAG_VALID_INHERIT;
 453         ace_v4->aceMask = ace_nt->access_mask &
 454                 (STD_RIGHT_ALL_ACCESS | SA_RIGHT_FILE_ALL_ACCESS);
 455
 456         if (ace_v4->aceFlags!=ace_nt->flags)
 457                 DEBUG(9, ("ace_v4->aceFlags(0x%x)!=ace_nt->flags(0x%x)\n",
 458                         ace_v4->aceFlags, ace_nt->flags));
 459
 460         if (ace_v4->aceMask!=ace_nt->access_mask)
 461                 DEBUG(9, ("ace_v4->aceMask(0x%x)!=ace_nt->access_mask(0x%x)\n",
 462                         ace_v4->aceMask, ace_nt->access_mask));
 463
 464         if (sid_equal(&ace_nt->trustee, &global_sid_World)) {
 465                 ace_v4->who.special_id = SMB_ACE4_WHO_EVERYONE;
 466                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
 467         } else {
 468                 if (!lookup_sid(mem_ctx, &ace_nt->trustee, &dom, &name, &type)) {
 469                         DEBUG(8, ("Could not find %s' type\n",
 470                                 sid_string_static(&ace_nt->trustee)));
 471                         errno = EINVAL;
 472                         return -1;
 473                 }
 474
 475                 if (type == SID_NAME_USER) {
 476                         if (!sid_to_uid(&ace_nt->trustee, &uid)) {
 477                                 DEBUG(2, ("Could not convert %s to uid\n",
 478                                         sid_string_static(&ace_nt->trustee)));
 479                                 return -1;
 480                         }
 481
 482                         if (params->mode==e_special && uid==ownerUID) {
 483                                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
 484                                 ace_v4->who.special_id = SMB_ACE4_WHO_OWNER;
 485                         } else {
 486                                 ace_v4->who.uid = uid;
 487                         }
 488                 } else { /* else group? - TODO check it... */
 489                         if (!sid_to_gid(&ace_nt->trustee, &gid)) {
 490                                 DEBUG(2, ("Could not convert %s to gid\n",
 491                                         sid_string_static(&ace_nt->trustee)));
 492                                 return -1;
 493                         }
 494                         ace_v4->aceFlags |= SMB_ACE4_IDENTIFIER_GROUP;
 495
 496                         if (params->mode==e_special && gid==ownerGID) {
 497                                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
 498                                 ace_v4->who.special_id = SMB_ACE4_WHO_GROUP;
 499                         } else {
 500                                 ace_v4->who.gid = gid;
 501                         }
 502                 }
 503         }
 504
 505         return 0; /* OK */
 506 }
 507
 508 static int smbacl4_MergeIgnoreReject(
 509         enum smbacl4_acedup_enum acedup,
 510         SMB4ACL_T *acl, /* may modify it */
 511         SMB_ACE4PROP_T *ace, /* the "new" ACE */
 512         BOOL    *paddNewACE,
 513         int     i
 514 )
 515 {
 516         int     result = 0;
 517         SMB_ACE4PROP_T *ace4found = smbacl4_find_equal_special(acl, ace);
 518         if (ace4found)
 519         {
 520                 switch(acedup)
 521                 {
 522                 case e_merge: /* "merge" flags */
 523                         *paddNewACE = False;
 524                         ace4found->aceFlags |= ace->aceFlags;
 525                         ace4found->aceMask |= ace->aceMask;
 526                         break;
 527                 case e_ignore: /* leave out this record */
 528                         *paddNewACE = False;
 529                         break;
 530                 case e_reject: /* do an error */
 531                         DEBUG(8, ("ACL rejected by duplicate nt ace#%d\n", i));
 532                         errno = EINVAL; /* SHOULD be set on any _real_ error */
 533                         result = -1;
 534                         break;
 535                 default:
 536                         break;
 537                 }
 538         }
 539         return result;
 540 }
 541
 542 static SMB4ACL_T *smbacl4_win2nfs4(
 543         SEC_ACL *dacl,
 544         smbacl4_vfs_params *pparams,
 545         uid_t ownerUID,
 546         gid_t ownerGID
 547 )
 548 {
 549         SMB4ACL_T *acl;
 550         uint32  i;
 551         TALLOC_CTX *mem_ctx = main_loop_talloc_get();
 552
 553         DEBUG(10, ("smbacl4_win2nfs4 invoked\n"));
 554
 555         acl = smb_create_smb4acl();
 556         if (acl==NULL)
 557                 return NULL;
 558
 559         for(i=0; i<dacl->num_aces; i++) {
 560                 SMB_ACE4PROP_T  ace_v4;
 561                 BOOL    addNewACE = True;
 562
 563                 if (smbacl4_fill_ace4(mem_ctx, pparams, ownerUID, ownerGID,
 564                         dacl->aces + i, &ace_v4))
 565                         return NULL;
 566
 567                 if (pparams->acedup!=e_dontcare) {
 568                         if (smbacl4_MergeIgnoreReject(pparams->acedup, acl,
 569                                 &ace_v4, &addNewACE, i))
 570                                 return NULL;
 571                 }
 572
 573                 if (addNewACE)
 574                         smb_add_ace4(acl, &ace_v4);
 575         }
 576
 577         return acl;
 578 }
 579
 580 BOOL smb_set_nt_acl_nfs4(files_struct *fsp,
 581         uint32 security_info_sent,
 582         SEC_DESC *psd,
 583         set_nfs4acl_native_fn_t set_nfs4_native)
 584 {
 585         smbacl4_vfs_params params;
 586         SMB4ACL_T *acl = NULL;
 587         BOOL    result;
 588
 589         SMB_STRUCT_STAT sbuf;
 590         BOOL set_acl_as_root = False;
 591         uid_t newUID = (uid_t)-1;
 592         gid_t newGID = (gid_t)-1;
 593         int saved_errno;
 594
 595         DEBUG(10, ("smb_set_nt_acl_nfs4 invoked for %s\n", fsp->fsp_name));
 596
 597         if ((security_info_sent & (DACL_SECURITY_INFORMATION |
 598                 GROUP_SECURITY_INFORMATION | OWNER_SECURITY_INFORMATION)) == 0)
 599         {
 600                 DEBUG(9, ("security_info_sent (0x%x) ignored\n",
 601                         security_info_sent));
 602                 return True; /* won't show error - later to be refined... */
 603         }
 604
 605         /* Special behaviours */
 606         if (smbacl4_get_vfs_params(SMBACL4_PARAM_TYPE_NAME, fsp, &params))
 607                 return False;
 608
 609         if (smbacl4_GetFileOwner(fsp, &sbuf))
 610                 return False;
 611
 612         if (params.do_chown) {
 613                 /* chown logic is a copy/paste from posix_acl.c:set_nt_acl */
 614                 if (!unpack_nt_owners(SNUM(fsp->conn), &newUID, &newGID, security_info_sent, psd))
 615                 {
 616                         DEBUG(8, ("unpack_nt_owners failed"));
 617                         return False;
 618                 }
 619                 if (((newUID != (uid_t)-1) && (sbuf.st_uid != newUID)) ||
 620                         ((newGID != (gid_t)-1) && (sbuf.st_gid != newGID))) {
 621                         if(try_chown(fsp->conn, fsp->fsp_name, newUID, newGID)) {
 622                                 DEBUG(3,("chown %s, %u, %u failed. Error = %s.\n",
 623                                         fsp->fsp_name, (unsigned int)newUID, (unsigned int)newGID, strerror(errno) ));
 624                                 return False;
 625                         }
 626                         DEBUG(10,("chown %s, %u, %u succeeded.\n",
 627                                 fsp->fsp_name, (unsigned int)newUID, (unsigned int)newGID));
 628                         if (smbacl4_GetFileOwner(fsp, &sbuf))
 629                                 return False;
 630                         /* If we successfully chowned, we know we must
 631                          * be able to set the acl, so do it as root.
 632                          */
 633                         set_acl_as_root = True;
 634                 }
 635         }
 636
 637         if (!(security_info_sent & DACL_SECURITY_INFORMATION) || psd->dacl ==NULL) {
 638                 DEBUG(10, ("no dacl found; security_info_sent = 0x%x\n", security_info_sent));
 639                 return True;
 640         }
 641         acl = smbacl4_win2nfs4(psd->dacl, &params, sbuf.st_uid, sbuf.st_gid);
 642         if (!acl)
 643                 return False;
 644
 645         smbacl4_dump_nfs4acl(10, acl);
 646
 647         if (set_acl_as_root) {
 648                 become_root();
 649         }
 650         result = set_nfs4_native(fsp, acl);
 651         saved_errno = errno;
 652         if (set_acl_as_root) {
 653                 unbecome_root();
 654         }
 655         if (result!=True) {
 656                 errno = saved_errno;
 657                 DEBUG(10, ("set_nfs4_native failed with %s\n", strerror(errno)));
 658                 return False;
 659         }
 660
 661         DEBUG(10, ("smb_set_nt_acl_nfs4 succeeded\n"));
 662         return True;
 663 }