source3/modules/vfs_aixacl2.c

   1 /*
   2  * Convert JFS2 NFS4/AIXC acls to NT acls and vice versa.
   3  *
   4  * Copyright (C) Volker Lendecke, 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 "system/filesys.h"
  22 #include "smbd/smbd.h"
  23 #include "nfs4_acls.h"
  24
  25 #undef DBGC_CLASS
  26 #define DBGC_CLASS DBGC_VFS
  27
  28 #define AIXACL2_MODULE_NAME "aixacl2"
  29
  30 extern SMB_ACL_T aixacl_to_smbacl( struct acl *file_acl);
  31 extern struct acl *aixacl_smb_to_aixacl(SMB_ACL_TYPE_T acltype, SMB_ACL_T theacl);
  32
  33 typedef union aixjfs2_acl_t {
  34         nfs4_acl_int_t jfs2_acl[1];
  35         aixc_acl_t aixc_acl[1];
  36 }AIXJFS2_ACL_T;
  37
  38 static int32_t aixacl2_getlen(AIXJFS2_ACL_T *acl, acl_type_t *type)
  39 {
  40         int32_t len;
  41
  42                 if(type->u64 == ACL_NFS4) {
  43                         len = acl->jfs2_acl[0].aclLength;
  44                 }
  45                 else {
  46                         if(type->u64 == ACL_AIXC) {
  47                                 len = acl->aixc_acl[0].acl_len;
  48                         } else {
  49                                 DEBUG(0,("aixacl2_getlen:unknown type:%d\n",type->u64));
  50                                 return False;
  51                         }
  52                 }
  53                 DEBUG(10,("aixacl2_getlen:%d\n",len));
  54         return len;
  55 }
  56
  57 static AIXJFS2_ACL_T *aixjfs2_getacl_alloc(const char *fname, acl_type_t *type)
  58 {
  59         AIXJFS2_ACL_T *acl;
  60         size_t len = 200;
  61         mode_t mode;
  62         int ret;
  63         uint64_t ctl_flag=0;
  64         TALLOC_CTX      *mem_ctx;
  65
  66         mem_ctx = talloc_tos();
  67         acl = (AIXJFS2_ACL_T *)TALLOC_SIZE(mem_ctx, len);
  68         if (acl == NULL) {
  69                 errno = ENOMEM;
  70                 return NULL;
  71         }
  72
  73         if(type->u64 == ACL_ANY) {
  74                 ctl_flag = ctl_flag | GET_ACLINFO_ONLY;
  75         }
  76
  77         ret = aclx_get((char *)fname, ctl_flag, type, acl, &len, &mode);
  78         if ((ret != 0) && (errno == ENOSPC)) {
  79                 len = aixacl2_getlen(acl, type) + sizeof(AIXJFS2_ACL_T);
  80                 DEBUG(10,("aixjfs2_getacl_alloc - acl_len:%d\n",len));
  81
  82                 acl = (AIXJFS2_ACL_T *)TALLOC_SIZE(mem_ctx, len);
  83                 if (acl == NULL) {
  84                         errno = ENOMEM;
  85                         return NULL;
  86                 }
  87
  88                 ret = aclx_get((char *)fname, ctl_flag, type, acl, &len, &mode);
  89         }
  90         if (ret != 0) {
  91                 DEBUG(8, ("aclx_get failed with %s\n", strerror(errno)));
  92                 return NULL;
  93         }
  94
  95         return acl;
  96 }
  97
  98 static bool aixjfs2_get_nfs4_acl(const char *name,
  99         SMB4ACL_T **ppacl, bool *pretryPosix)
 100 {
 101         int32_t i;
 102
 103         AIXJFS2_ACL_T *pacl = NULL;
 104         nfs4_acl_int_t *jfs2_acl = NULL;
 105         nfs4_ace_int_t *jfs2_ace = NULL;
 106         acl_type_t type;
 107
 108         DEBUG(10,("jfs2 get_nt_acl invoked for %s\n", name));
 109
 110         memset(&type, 0, sizeof(acl_type_t));
 111         type.u64 = ACL_NFS4;
 112
 113         pacl = aixjfs2_getacl_alloc(name, &type);
 114         if (pacl == NULL) {
 115                 DEBUG(9, ("aixjfs2_getacl_alloc failed for %s with %s\n",
 116                                 name, strerror(errno)));
 117                 if (errno==ENOSYS)
 118                         *pretryPosix = True;
 119                 return False;
 120         }
 121
 122         jfs2_acl = &pacl->jfs2_acl[0];
 123         DEBUG(10, ("len: %d, version: %d, nace: %d, type: 0x%x\n",
 124                         jfs2_acl->aclLength, jfs2_acl->aclVersion, jfs2_acl->aclEntryN, type.u64));
 125
 126         *ppacl = smb_create_smb4acl();
 127         if (*ppacl==NULL)
 128                 return False;
 129
 130         jfs2_ace = &jfs2_acl->aclEntry[0];
 131         for (i=0; i<jfs2_acl->aclEntryN; i++) {
 132                 SMB_ACE4PROP_T aceprop;
 133
 134                 DEBUG(10, ("type: %d, iflags: %x, flags: %x, mask: %x, "
 135                                 "who: %d, aclLen: %d\n", jfs2_ace->aceType, jfs2_ace->flags,
 136                                 jfs2_ace->aceFlags, jfs2_ace->aceMask, jfs2_ace->aceWho.id, jfs2_ace->entryLen));
 137
 138                 aceprop.aceType = jfs2_ace->aceType;
 139                 aceprop.aceFlags = jfs2_ace->aceFlags;
 140                 aceprop.aceMask = jfs2_ace->aceMask;
 141                 aceprop.flags = (jfs2_ace->flags&ACE4_ID_SPECIAL) ? SMB_ACE4_ID_SPECIAL : 0;
 142
 143                 /* don't care it's real content is only 16 or 32 bit */
 144                 aceprop.who.id = jfs2_ace->aceWho.id;
 145
 146                 if (smb_add_ace4(*ppacl, &aceprop)==NULL)
 147                         return False;
 148
 149                 /* iterate to the next jfs2 ace */
 150                 jfs2_ace = (nfs4_ace_int_t *)(((char *)jfs2_ace) + jfs2_ace->entryLen);
 151         }
 152
 153         DEBUG(10,("jfs2 get_nt_acl finished successfully\n"));
 154
 155         return True;
 156 }
 157
 158 static NTSTATUS aixjfs2_fget_nt_acl(vfs_handle_struct *handle,
 159         files_struct *fsp, uint32 security_info,
 160         TALLOC_CTX *mem_ctx,
 161         struct security_descriptor **ppdesc)
 162 {
 163         SMB4ACL_T *pacl = NULL;
 164         bool    result;
 165         bool    retryPosix = False;
 166
 167         *ppdesc = NULL;
 168         result = aixjfs2_get_nfs4_acl(fsp->fsp_name->base_name, &pacl,
 169                                       &retryPosix);
 170         if (retryPosix)
 171         {
 172                 DEBUG(10, ("retrying with posix acl...\n"));
 173                 return posix_fget_nt_acl(fsp, security_info,
 174                                          mem_ctx, ppdesc);
 175         }
 176         if (result==False)
 177                 return NT_STATUS_ACCESS_DENIED;
 178
 179         return smb_fget_nt_acl_nfs4(fsp, security_info, ppdesc,
 180                                     mem_ctx, pacl);
 181 }
 182
 183 static NTSTATUS aixjfs2_get_nt_acl(vfs_handle_struct *handle,
 184         const char *name,
 185         uint32 security_info,
 186         TALLOC_CTX *mem_ctx,
 187         struct security_descriptor **ppdesc)
 188 {
 189         SMB4ACL_T *pacl = NULL;
 190         bool    result;
 191         bool    retryPosix = False;
 192
 193         *ppdesc = NULL;
 194         result = aixjfs2_get_nfs4_acl(name, &pacl, &retryPosix);
 195         if (retryPosix)
 196         {
 197                 DEBUG(10, ("retrying with posix acl...\n"));
 198                 return posix_get_nt_acl(handle->conn, name, security_info,
 199                                         mem_ctx, ppdesc);
 200         }
 201         if (result==False)
 202                 return NT_STATUS_ACCESS_DENIED;
 203
 204         return smb_get_nt_acl_nfs4(handle->conn, name, security_info,
 205                                    mem_ctx, ppdesc,
 206                                    pacl);
 207 }
 208
 209 static SMB_ACL_T aixjfs2_get_posix_acl(const char *path, acl_type_t type, TALLOC_CTX *mem_ctx)
 210 {
 211         aixc_acl_t *pacl;
 212         AIXJFS2_ACL_T *acl;
 213         SMB_ACL_T result = NULL;
 214         int ret;
 215
 216         acl = aixjfs2_getacl_alloc(path, &type);
 217
 218         if (acl == NULL) {
 219                 DEBUG(10, ("aixjfs2_getacl failed for %s with %s\n",
 220                            path, strerror(errno)));
 221                 if (errno == 0) {
 222                         errno = EINVAL;
 223                 }
 224                 goto done;
 225         }
 226
 227         pacl = &acl->aixc_acl[0];
 228         DEBUG(10, ("len: %d, mode: %d\n",
 229                    pacl->acl_len, pacl->acl_mode));
 230
 231         result = aixacl_to_smbacl(pacl, mem_ctx);
 232         if (result == NULL) {
 233                 goto done;
 234         }
 235
 236  done:
 237         if (errno != 0) {
 238                 TALLOC_FREE(result);
 239         }
 240         return result;
 241 }
 242
 243 SMB_ACL_T aixjfs2_sys_acl_get_file(vfs_handle_struct *handle,
 244                                     const char *path_p,
 245                                    SMB_ACL_TYPE_T type,
 246                                    TALLOC_CTX *mem_ctx)
 247 {
 248         acl_type_t aixjfs2_type;
 249
 250         switch(type) {
 251         case SMB_ACL_TYPE_ACCESS:
 252                 aixjfs2_type.u64 = ACL_AIXC;
 253                 break;
 254         case SMB_ACL_TYPE_DEFAULT:
 255                 DEBUG(0, ("Got AIX JFS2 unsupported type: %d\n", type));
 256                 return NULL;
 257         default:
 258                 DEBUG(0, ("Got invalid type: %d\n", type));
 259                 smb_panic("exiting");
 260         }
 261
 262         return aixjfs2_get_posix_acl(path_p, aixjfs2_type, mem_ctx);
 263 }
 264
 265 SMB_ACL_T aixjfs2_sys_acl_get_fd(vfs_handle_struct *handle,
 266                                   files_struct *fsp)
 267 {
 268         acl_type_t aixjfs2_type;
 269         aixjfs2_type.u64 = ACL_AIXC;
 270
 271         return aixjfs2_get_posix_acl(fsp->fsp_name->base_name, aixjfs2_type);
 272 }
 273
 274 /*
 275  * Test whether we have that aclType support on the given path
 276  */
 277 static int aixjfs2_query_acl_support(
 278         char *filepath,
 279         uint64_t aclType,
 280         acl_type_t *pacl_type_info
 281 )
 282 {
 283         acl_types_list_t        acl_type_list;
 284         size_t  acl_type_list_len = sizeof(acl_types_list_t);
 285         uint32_t        i;
 286
 287         memset(&acl_type_list, 0, sizeof(acl_type_list));
 288
 289         if (aclx_gettypes(filepath, &acl_type_list, &acl_type_list_len)) {
 290                 DEBUG(2, ("aclx_gettypes failed with error %s for %s\n",
 291                         strerror(errno), filepath));
 292                 return -1;
 293         }
 294
 295         for(i=0; i<acl_type_list.num_entries; i++) {
 296                 if (acl_type_list.entries[i].u64==aclType) {
 297                         memcpy(pacl_type_info, acl_type_list.entries + i, sizeof(acl_type_t));
 298                         DEBUG(10, ("found %s ACL support for %s\n",
 299                                 pacl_type_info->acl_type, filepath));
 300                         return 0;
 301                 }
 302         }
 303
 304         return 1; /* haven't found that ACL type. */
 305 }
 306
 307 static bool aixjfs2_process_smbacl(files_struct *fsp, SMB4ACL_T *smbacl)
 308 {
 309         SMB4ACE_T       *smbace;
 310         TALLOC_CTX      *mem_ctx;
 311         nfs4_acl_int_t  *jfs2acl;
 312         int32_t entryLen;
 313         uint32  aclLen, naces;
 314         int     rc;
 315         acl_type_t      acltype;
 316
 317         DEBUG(10, ("jfs2_process_smbacl invoked on %s\n", fsp_str_dbg(fsp)));
 318
 319         /* no need to be freed which is alloced with mem_ctx */
 320         mem_ctx = talloc_tos();
 321
 322         entryLen = sizeof(nfs4_ace_int_t);
 323         if (entryLen & 0x03)
 324                 entryLen = entryLen + 4 - (entryLen%4);
 325
 326         naces = smb_get_naces(smbacl);
 327         aclLen = ACL_V4_SIZ + naces * entryLen;
 328         jfs2acl = (nfs4_acl_int_t *)TALLOC_SIZE(mem_ctx, aclLen);
 329         if (jfs2acl==NULL) {
 330                 DEBUG(0, ("TALLOC_SIZE failed\n"));
 331                 errno = ENOMEM;
 332                 return False;
 333         }
 334
 335         jfs2acl->aclLength = ACL_V4_SIZ;
 336         jfs2acl->aclVersion = NFS4_ACL_INT_STRUCT_VERSION;
 337         jfs2acl->aclEntryN = 0;
 338
 339         for(smbace = smb_first_ace4(smbacl); smbace!=NULL; smbace = smb_next_ace4(smbace))
 340         {
 341                 SMB_ACE4PROP_T *aceprop = smb_get_ace4(smbace);
 342                 nfs4_ace_int_t *jfs2_ace = (nfs4_ace_int_t *)(((char *)jfs2acl) + jfs2acl->aclLength);
 343
 344                 memset(jfs2_ace, 0, entryLen);
 345                 jfs2_ace->entryLen = entryLen; /* won't store textual "who" */
 346                 jfs2_ace->aceType = aceprop->aceType; /* only ACCES|DENY supported by jfs2 */
 347                 jfs2_ace->aceFlags = aceprop->aceFlags;
 348                 jfs2_ace->aceMask = aceprop->aceMask;
 349                 jfs2_ace->flags = (aceprop->flags&SMB_ACE4_ID_SPECIAL) ? ACE4_ID_SPECIAL : 0;
 350
 351                 /* don't care it's real content is only 16 or 32 bit */
 352                 jfs2_ace->aceWho.id = aceprop->who.id;
 353
 354                 /* iterate to the next jfs2 ace */
 355                 jfs2acl->aclLength += jfs2_ace->entryLen;
 356                 jfs2acl->aclEntryN++;
 357         }
 358         SMB_ASSERT(jfs2acl->aclEntryN==naces);
 359
 360         /* Don't query it (again) */
 361         memset(&acltype, 0, sizeof(acl_type_t));
 362         acltype.u64 = ACL_NFS4;
 363
 364         /* won't set S_ISUID - the only one JFS2/NFS4 accepts */
 365         rc = aclx_put(
 366                 fsp->fsp_name->base_name,
 367                 SET_ACL, /* set only the ACL, not mode bits */
 368                 acltype, /* not a pointer !!! */
 369                 jfs2acl,
 370                 jfs2acl->aclLength,
 371                 0 /* don't set here mode bits */
 372         );
 373         if (rc) {
 374                 DEBUG(8, ("aclx_put failed with %s\n", strerror(errno)));
 375                 return False;
 376         }
 377
 378         DEBUG(10, ("jfs2_process_smbacl succeeded.\n"));
 379         return True;
 380 }
 381
 382 static NTSTATUS aixjfs2_set_nt_acl_common(files_struct *fsp, uint32 security_info_sent, const struct security_descriptor *psd)
 383 {
 384         acl_type_t      acl_type_info;
 385         NTSTATUS        result = NT_STATUS_ACCESS_DENIED;
 386         int     rc;
 387
 388         rc = aixjfs2_query_acl_support(
 389                 fsp->fsp_name,
 390                 ACL_NFS4,
 391                 &acl_type_info);
 392
 393         if (rc==0)
 394         {
 395                 result = smb_set_nt_acl_nfs4(
 396                         fsp, security_info_sent, psd,
 397                         aixjfs2_process_smbacl);
 398         } else if (rc==1) { /* assume POSIX ACL - by default... */
 399                 result = set_nt_acl(fsp, security_info_sent, psd);
 400         } else
 401                 result = map_nt_error_from_unix(errno); /* query failed */
 402
 403         return result;
 404 }
 405
 406 NTSTATUS aixjfs2_fset_nt_acl(vfs_handle_struct *handle, files_struct *fsp, uint32 security_info_sent, const struct security_descriptor *psd)
 407 {
 408         return aixjfs2_set_nt_acl_common(fsp, security_info_sent, psd);
 409 }
 410
 411 int aixjfs2_sys_acl_set_file(vfs_handle_struct *handle,
 412                               const char *name,
 413                               SMB_ACL_TYPE_T type,
 414                               SMB_ACL_T theacl)
 415 {
 416         struct acl      *acl_aixc;
 417         acl_type_t      acl_type_info;
 418         int     rc;
 419
 420         DEBUG(10, ("aixjfs2_sys_acl_set_file invoked for %s", name));
 421
 422         rc = aixjfs2_query_acl_support((char *)name, ACL_AIXC, &acl_type_info);
 423         if (rc) {
 424                 DEBUG(8, ("jfs2_set_nt_acl: AIXC support not found\n"));
 425                 return -1;
 426         }
 427
 428         acl_aixc = aixacl_smb_to_aixacl(type, theacl);
 429         if (!acl_aixc)
 430                 return -1;
 431
 432         rc = aclx_put(
 433                 (char *)name,
 434                 SET_ACL, /* set only the ACL, not mode bits */
 435                 acl_type_info,
 436                 acl_aixc,
 437                 acl_aixc->acl_len,
 438                 0
 439         );
 440         if (rc) {
 441                 DEBUG(2, ("aclx_put failed with %s for %s\n",
 442                         strerror(errno), name));
 443                 return -1;
 444         }
 445
 446         return 0;
 447 }
 448
 449 int aixjfs2_sys_acl_set_fd(vfs_handle_struct *handle,
 450                             files_struct *fsp,
 451                             SMB_ACL_T theacl)
 452 {
 453         struct acl      *acl_aixc;
 454         acl_type_t      acl_type_info;
 455         int     rc;
 456
 457         DEBUG(10, ("aixjfs2_sys_acl_set_fd invoked for %s", fsp_str_dbg(fsp)));
 458
 459         rc = aixjfs2_query_acl_support(fsp->fsp_name->base_name, ACL_AIXC,
 460                                        &acl_type_info);
 461         if (rc) {
 462                 DEBUG(8, ("jfs2_set_nt_acl: AIXC support not found\n"));
 463                 return -1;
 464         }
 465
 466         acl_aixc = aixacl_smb_to_aixacl(SMB_ACL_TYPE_ACCESS, theacl);
 467         if (!acl_aixc)
 468                 return -1;
 469
 470         rc = aclx_fput(
 471                 fsp->fh->fd,
 472                 SET_ACL, /* set only the ACL, not mode bits */
 473                 acl_type_info,
 474                 acl_aixc,
 475                 acl_aixc->acl_len,
 476                 0
 477         );
 478         if (rc) {
 479                 DEBUG(2, ("aclx_fput failed with %s for %s\n",
 480                         strerror(errno), fsp_str_dbg(fsp)));
 481                 return -1;
 482         }
 483
 484         return 0;
 485 }
 486
 487 int aixjfs2_sys_acl_delete_def_file(vfs_handle_struct *handle,
 488                                      const char *path)
 489 {
 490         /* Not available under AIXC ACL */
 491         /* Don't report here any error otherwise */
 492         /* upper layer will break the normal execution */
 493         return 0;
 494 }
 495
 496 static struct vfs_fn_pointers vfs_aixacl2_fns = {
 497         .fget_nt_acl_fn = aixjfs2_fget_nt_acl,
 498         .get_nt_acl_fn = aixjfs2_get_nt_acl,
 499         .fset_nt_acl_fn = aixjfs2_fset_nt_acl,
 500         .sys_acl_get_file_fn = aixjfs2_sys_acl_get_file,
 501         .sys_acl_get_fd_fn = aixjfs2_sys_acl_get_fd,
 502         .sys_acl_set_file_fn = aixjfs2_sys_acl_set_file,
 503         .sys_acl_set_fd_fn = aixjfs2_sys_acl_set_fd,
 504         .sys_acl_delete_def_file_fn = aixjfs2_sys_acl_delete_def_file
 505 };
 506
 507 NTSTATUS vfs_aixacl2_init(void);
 508 NTSTATUS vfs_aixacl2_init(void)
 509 {
 510         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, AIXACL2_MODULE_NAME,
 511                                 &vfs_aixacl2_fns);
 512 }