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 #include "vfs_aixacl_util.h"
  25
  26 #undef DBGC_CLASS
  27 #define DBGC_CLASS DBGC_VFS
  28
  29 #define AIXACL2_MODULE_NAME "aixacl2"
  30
  31 typedef union aixjfs2_acl_t {
  32         nfs4_acl_int_t jfs2_acl[1];
  33         aixc_acl_t aixc_acl[1];
  34 }AIXJFS2_ACL_T;
  35
  36 static int32_t aixacl2_getlen(AIXJFS2_ACL_T *acl, acl_type_t *type)
  37 {
  38         int32_t len;
  39
  40                 if(type->u64 == ACL_NFS4) {
  41                         len = acl->jfs2_acl[0].aclLength;
  42                 }
  43                 else {
  44                         if(type->u64 == ACL_AIXC) {
  45                                 len = acl->aixc_acl[0].acl_len;
  46                         } else {
  47                                 DEBUG(0,("aixacl2_getlen:unknown type:%d\n",type->u64));
  48                                 return False;
  49                         }
  50                 }
  51                 DEBUG(10,("aixacl2_getlen:%d\n",len));
  52         return len;
  53 }
  54
  55 static AIXJFS2_ACL_T *aixjfs2_getacl_alloc(const char *fname, acl_type_t *type)
  56 {
  57         AIXJFS2_ACL_T *acl;
  58         size_t len = 200;
  59         mode_t mode;
  60         int ret;
  61         uint64_t ctl_flag=0;
  62         TALLOC_CTX      *mem_ctx;
  63
  64         mem_ctx = talloc_tos();
  65         acl = (AIXJFS2_ACL_T *)TALLOC_SIZE(mem_ctx, len);
  66         if (acl == NULL) {
  67                 errno = ENOMEM;
  68                 return NULL;
  69         }
  70
  71         if(type->u64 == ACL_ANY) {
  72                 ctl_flag = ctl_flag | GET_ACLINFO_ONLY;
  73         }
  74
  75         ret = aclx_get((char *)fname, ctl_flag, type, acl, &len, &mode);
  76         if ((ret != 0) && (errno == ENOSPC)) {
  77                 len = aixacl2_getlen(acl, type) + sizeof(AIXJFS2_ACL_T);
  78                 DEBUG(10,("aixjfs2_getacl_alloc - acl_len:%d\n",len));
  79
  80                 acl = (AIXJFS2_ACL_T *)TALLOC_SIZE(mem_ctx, len);
  81                 if (acl == NULL) {
  82                         errno = ENOMEM;
  83                         return NULL;
  84                 }
  85
  86                 ret = aclx_get((char *)fname, ctl_flag, type, acl, &len, &mode);
  87         }
  88         if (ret != 0) {
  89                 DEBUG(8, ("aclx_get failed with %s\n", strerror(errno)));
  90                 return NULL;
  91         }
  92
  93         return acl;
  94 }
  95
  96 static bool aixjfs2_get_nfs4_acl(TALLOC_CTX *mem_ctx, const char *name,
  97         struct SMB4ACL_T **ppacl, bool *pretryPosix)
  98 {
  99         int32_t i;
 100
 101         AIXJFS2_ACL_T *pacl = NULL;
 102         nfs4_acl_int_t *jfs2_acl = NULL;
 103         nfs4_ace_int_t *jfs2_ace = NULL;
 104         acl_type_t type;
 105
 106         DEBUG(10,("jfs2 get_nt_acl invoked for %s\n", name));
 107
 108         memset(&type, 0, sizeof(acl_type_t));
 109         type.u64 = ACL_NFS4;
 110
 111         pacl = aixjfs2_getacl_alloc(name, &type);
 112         if (pacl == NULL) {
 113                 DEBUG(9, ("aixjfs2_getacl_alloc failed for %s with %s\n",
 114                                 name, strerror(errno)));
 115                 if (errno==ENOSYS)
 116                         *pretryPosix = True;
 117                 return False;
 118         }
 119
 120         jfs2_acl = &pacl->jfs2_acl[0];
 121         DEBUG(10, ("len: %d, version: %d, nace: %d, type: 0x%x\n",
 122                         jfs2_acl->aclLength, jfs2_acl->aclVersion, jfs2_acl->aclEntryN, type.u64));
 123
 124         *ppacl = smb_create_smb4acl(mem_ctx);
 125         if (*ppacl==NULL)
 126                 return False;
 127
 128         jfs2_ace = &jfs2_acl->aclEntry[0];
 129         for (i=0; i<jfs2_acl->aclEntryN; i++) {
 130                 SMB_ACE4PROP_T aceprop;
 131
 132                 DEBUG(10, ("type: %d, iflags: %x, flags: %x, mask: %x, "
 133                                 "who: %d, aclLen: %d\n", jfs2_ace->aceType, jfs2_ace->flags,
 134                                 jfs2_ace->aceFlags, jfs2_ace->aceMask, jfs2_ace->aceWho.id, jfs2_ace->entryLen));
 135
 136                 aceprop.aceType = jfs2_ace->aceType;
 137                 aceprop.aceFlags = jfs2_ace->aceFlags;
 138                 aceprop.aceMask = jfs2_ace->aceMask;
 139                 aceprop.flags = (jfs2_ace->flags&ACE4_ID_SPECIAL) ? SMB_ACE4_ID_SPECIAL : 0;
 140
 141                 /* don't care it's real content is only 16 or 32 bit */
 142                 aceprop.who.id = jfs2_ace->aceWho.id;
 143
 144                 if (smb_add_ace4(*ppacl, &aceprop)==NULL)
 145                         return False;
 146
 147                 /* iterate to the next jfs2 ace */
 148                 jfs2_ace = (nfs4_ace_int_t *)(((char *)jfs2_ace) + jfs2_ace->entryLen);
 149         }
 150
 151         DEBUG(10,("jfs2 get_nt_acl finished successfully\n"));
 152
 153         return True;
 154 }
 155
 156 static NTSTATUS aixjfs2_fget_nt_acl(vfs_handle_struct *handle,
 157         files_struct *fsp, uint32_t security_info,
 158         TALLOC_CTX *mem_ctx,
 159         struct security_descriptor **ppdesc)
 160 {
 161         NTSTATUS status;
 162         struct SMB4ACL_T *pacl = NULL;
 163         bool    result;
 164         bool    retryPosix = False;
 165         TALLOC_CTX *frame = talloc_stackframe();
 166
 167         *ppdesc = NULL;
 168         result = aixjfs2_get_nfs4_acl(frame, fsp->fsp_name->base_name, &pacl,
 169                                       &retryPosix);
 170         if (retryPosix)
 171         {
 172                 TALLOC_FREE(frame);
 173                 DEBUG(10, ("retrying with posix acl...\n"));
 174                 return posix_fget_nt_acl(fsp, security_info,
 175                                          mem_ctx, ppdesc);
 176         }
 177         if (result==False) {
 178                 TALLOC_FREE(frame);
 179                 return NT_STATUS_ACCESS_DENIED;
 180         }
 181
 182         status = smb_fget_nt_acl_nfs4(fsp, security_info, ppdesc,
 183                                       mem_ctx, pacl);
 184         TALLOC_FREE(frame);
 185         return status;
 186 }
 187
 188 static NTSTATUS aixjfs2_get_nt_acl(vfs_handle_struct *handle,
 189         const char *name,
 190         uint32_t security_info,
 191         TALLOC_CTX *mem_ctx,
 192         struct security_descriptor **ppdesc)
 193 {
 194         struct SMB4ACL_T *pacl = NULL;
 195         bool    result;
 196         bool    retryPosix = False;
 197
 198         *ppdesc = NULL;
 199         result = aixjfs2_get_nfs4_acl(mem_ctx, name, &pacl, &retryPosix);
 200         if (retryPosix)
 201         {
 202                 DEBUG(10, ("retrying with posix acl...\n"));
 203                 return posix_get_nt_acl(handle->conn, name, security_info,
 204                                         mem_ctx, ppdesc);
 205         }
 206         if (result==False)
 207                 return NT_STATUS_ACCESS_DENIED;
 208
 209         return smb_get_nt_acl_nfs4(handle->conn, name, security_info,
 210                                    mem_ctx, ppdesc,
 211                                    pacl);
 212 }
 213
 214 static int aixjfs2_sys_acl_blob_get_file(vfs_handle_struct *handle, const char *path_p, TALLOC_CTX *mem_ctx, char **blob_description, DATA_BLOB *blob)
 215 {
 216         struct SMB4ACL_T *pacl = NULL;
 217         bool    result;
 218         bool    retryPosix = False;
 219
 220         result = aixjfs2_get_nfs4_acl(mem_ctx, path_p, &pacl, &retryPosix);
 221         if (retryPosix)
 222         {
 223                 return posix_sys_acl_blob_get_file(handle, path_p, mem_ctx,
 224                                                    blob_description, blob);
 225         }
 226         /* Now way to linarlise NFS4 ACLs at the moment, but the NT ACL is pretty close in this case */
 227         errno = ENOSYS;
 228         return -1;
 229 }
 230
 231 static int aixjfs2_sys_acl_blob_get_fd(vfs_handle_struct *handle, files_struct *fsp, TALLOC_CTX *mem_ctx, char **blob_description, DATA_BLOB *blob)
 232 {
 233         struct SMB4ACL_T *pacl = NULL;
 234         bool    result;
 235         bool    retryPosix = False;
 236
 237         result = aixjfs2_get_nfs4_acl(mem_ctx, fsp->fsp_name->base_name, &pacl,
 238                                       &retryPosix);
 239         if (retryPosix)
 240         {
 241                 return posix_sys_acl_blob_get_fd(handle, fsp, mem_ctx, blob_description, blob);
 242         }
 243
 244         /* Now way to linarlise NFS4 ACLs at the moment, but the NT ACL is pretty close in this case */
 245         errno = ENOSYS;
 246         return -1;
 247 }
 248
 249 static SMB_ACL_T aixjfs2_get_posix_acl(const char *path, acl_type_t type, TALLOC_CTX *mem_ctx)
 250 {
 251         aixc_acl_t *pacl;
 252         AIXJFS2_ACL_T *acl;
 253         SMB_ACL_T result = NULL;
 254         int ret;
 255
 256         acl = aixjfs2_getacl_alloc(path, &type);
 257
 258         if (acl == NULL) {
 259                 DEBUG(10, ("aixjfs2_getacl failed for %s with %s\n",
 260                            path, strerror(errno)));
 261                 if (errno == 0) {
 262                         errno = EINVAL;
 263                 }
 264                 goto done;
 265         }
 266
 267         pacl = &acl->aixc_acl[0];
 268         DEBUG(10, ("len: %d, mode: %d\n",
 269                    pacl->acl_len, pacl->acl_mode));
 270
 271         result = aixacl_to_smbacl(pacl, mem_ctx);
 272         if (result == NULL) {
 273                 goto done;
 274         }
 275
 276  done:
 277         if (errno != 0) {
 278                 TALLOC_FREE(result);
 279         }
 280         return result;
 281 }
 282
 283 SMB_ACL_T aixjfs2_sys_acl_get_file(vfs_handle_struct *handle,
 284                                     const char *path_p,
 285                                    SMB_ACL_TYPE_T type,
 286                                    TALLOC_CTX *mem_ctx)
 287 {
 288         acl_type_t aixjfs2_type;
 289
 290         switch(type) {
 291         case SMB_ACL_TYPE_ACCESS:
 292                 aixjfs2_type.u64 = ACL_AIXC;
 293                 break;
 294         case SMB_ACL_TYPE_DEFAULT:
 295                 DEBUG(0, ("Got AIX JFS2 unsupported type: %d\n", type));
 296                 return NULL;
 297         default:
 298                 DEBUG(0, ("Got invalid type: %d\n", type));
 299                 smb_panic("exiting");
 300         }
 301
 302         return aixjfs2_get_posix_acl(path_p, aixjfs2_type, mem_ctx);
 303 }
 304
 305 SMB_ACL_T aixjfs2_sys_acl_get_fd(vfs_handle_struct *handle,
 306                                  files_struct *fsp, TALLOC_CTX *mem_ctx)
 307 {
 308         acl_type_t aixjfs2_type;
 309         aixjfs2_type.u64 = ACL_AIXC;
 310
 311         return aixjfs2_get_posix_acl(fsp->fsp_name->base_name,
 312                                      aixjfs2_type, mem_ctx);
 313 }
 314
 315 /*
 316  * Test whether we have that aclType support on the given path
 317  */
 318 static int aixjfs2_query_acl_support(
 319         char *filepath,
 320         uint64_t aclType,
 321         acl_type_t *pacl_type_info
 322 )
 323 {
 324         acl_types_list_t acl_type_list;
 325         size_t acl_type_list_len = sizeof(acl_types_list_t);
 326         uint32_t i;
 327
 328         memset(&acl_type_list, 0, sizeof(acl_type_list));
 329
 330         if (aclx_gettypes(filepath, &acl_type_list, &acl_type_list_len)) {
 331                 DEBUG(2, ("aclx_gettypes failed with error %s for %s\n",
 332                         strerror(errno), filepath));
 333                 return -1;
 334         }
 335
 336         for(i=0; i<acl_type_list.num_entries; i++) {
 337                 if (acl_type_list.entries[i].u64==aclType) {
 338                         memcpy(pacl_type_info, acl_type_list.entries + i, sizeof(acl_type_t));
 339                         DEBUG(10, ("found %s ACL support for %s\n",
 340                                 pacl_type_info->acl_type, filepath));
 341                         return 0;
 342                 }
 343         }
 344
 345         return 1; /* haven't found that ACL type. */
 346 }
 347
 348 static bool aixjfs2_process_smbacl(vfs_handle_struct *handle,
 349                                    files_struct *fsp,
 350                                    struct SMB4ACL_T *smbacl)
 351 {
 352         struct SMB4ACE_T *smbace;
 353         TALLOC_CTX      *mem_ctx;
 354         nfs4_acl_int_t  *jfs2acl;
 355         int32_t         entryLen;
 356         uint32_t        aclLen, naces;
 357         int             rc;
 358         acl_type_t      acltype;
 359
 360         DEBUG(10, ("jfs2_process_smbacl invoked on %s\n", fsp_str_dbg(fsp)));
 361
 362         /* no need to be freed which is alloced with mem_ctx */
 363         mem_ctx = talloc_tos();
 364
 365         entryLen = sizeof(nfs4_ace_int_t);
 366         if (entryLen & 0x03)
 367                 entryLen = entryLen + 4 - (entryLen%4);
 368
 369         naces = smb_get_naces(smbacl);
 370         aclLen = ACL_V4_SIZ + naces * entryLen;
 371         jfs2acl = (nfs4_acl_int_t *)TALLOC_SIZE(mem_ctx, aclLen);
 372         if (jfs2acl==NULL) {
 373                 DEBUG(0, ("TALLOC_SIZE failed\n"));
 374                 errno = ENOMEM;
 375                 return False;
 376         }
 377
 378         jfs2acl->aclLength = ACL_V4_SIZ;
 379         jfs2acl->aclVersion = NFS4_ACL_INT_STRUCT_VERSION;
 380         jfs2acl->aclEntryN = 0;
 381
 382         for(smbace = smb_first_ace4(smbacl); smbace!=NULL; smbace = smb_next_ace4(smbace))
 383         {
 384                 SMB_ACE4PROP_T *aceprop = smb_get_ace4(smbace);
 385                 nfs4_ace_int_t *jfs2_ace = (nfs4_ace_int_t *)(((char *)jfs2acl) + jfs2acl->aclLength);
 386
 387                 memset(jfs2_ace, 0, entryLen);
 388                 jfs2_ace->entryLen = entryLen; /* won't store textual "who" */
 389                 jfs2_ace->aceType = aceprop->aceType; /* only ACCES|DENY supported by jfs2 */
 390                 jfs2_ace->aceFlags = aceprop->aceFlags;
 391                 jfs2_ace->aceMask = aceprop->aceMask;
 392                 jfs2_ace->flags = (aceprop->flags&SMB_ACE4_ID_SPECIAL) ? ACE4_ID_SPECIAL : 0;
 393
 394                 /* don't care it's real content is only 16 or 32 bit */
 395                 jfs2_ace->aceWho.id = aceprop->who.id;
 396
 397                 /* iterate to the next jfs2 ace */
 398                 jfs2acl->aclLength += jfs2_ace->entryLen;
 399                 jfs2acl->aclEntryN++;
 400         }
 401         SMB_ASSERT(jfs2acl->aclEntryN==naces);
 402
 403         /* Don't query it (again) */
 404         memset(&acltype, 0, sizeof(acl_type_t));
 405         acltype.u64 = ACL_NFS4;
 406
 407         /* won't set S_ISUID - the only one JFS2/NFS4 accepts */
 408         rc = aclx_put(
 409                 fsp->fsp_name->base_name,
 410                 SET_ACL, /* set only the ACL, not mode bits */
 411                 acltype, /* not a pointer !!! */
 412                 jfs2acl,
 413                 jfs2acl->aclLength,
 414                 0 /* don't set here mode bits */
 415         );
 416         if (rc) {
 417                 DEBUG(8, ("aclx_put failed with %s\n", strerror(errno)));
 418                 return False;
 419         }
 420
 421         DEBUG(10, ("jfs2_process_smbacl succeeded.\n"));
 422         return True;
 423 }
 424
 425 static NTSTATUS aixjfs2_set_nt_acl_common(vfs_handle_struct *handle, files_struct *fsp, uint32_t security_info_sent, const struct security_descriptor *psd)
 426 {
 427         acl_type_t      acl_type_info;
 428         NTSTATUS        result = NT_STATUS_ACCESS_DENIED;
 429         int     rc;
 430
 431         rc = aixjfs2_query_acl_support(
 432                 fsp->fsp_name->base_name,
 433                 ACL_NFS4,
 434                 &acl_type_info);
 435
 436         if (rc==0)
 437         {
 438                 result = smb_set_nt_acl_nfs4(handle,
 439                         fsp, security_info_sent, psd,
 440                         aixjfs2_process_smbacl);
 441         } else if (rc==1) { /* assume POSIX ACL - by default... */
 442                 result = set_nt_acl(fsp, security_info_sent, psd);
 443         } else
 444                 result = map_nt_error_from_unix(errno); /* query failed */
 445
 446         return result;
 447 }
 448
 449 NTSTATUS aixjfs2_fset_nt_acl(vfs_handle_struct *handle, files_struct *fsp, uint32_t security_info_sent, const struct security_descriptor *psd)
 450 {
 451         return aixjfs2_set_nt_acl_common(handle, fsp, security_info_sent, psd);
 452 }
 453
 454 int aixjfs2_sys_acl_set_file(vfs_handle_struct *handle,
 455                               const char *name,
 456                               SMB_ACL_TYPE_T type,
 457                               SMB_ACL_T theacl)
 458 {
 459         struct acl      *acl_aixc;
 460         acl_type_t      acl_type_info;
 461         int     rc;
 462
 463         DEBUG(10, ("aixjfs2_sys_acl_set_file invoked for %s", name));
 464
 465         rc = aixjfs2_query_acl_support((char *)name, ACL_AIXC, &acl_type_info);
 466         if (rc) {
 467                 DEBUG(8, ("jfs2_set_nt_acl: AIXC support not found\n"));
 468                 return -1;
 469         }
 470
 471         acl_aixc = aixacl_smb_to_aixacl(type, theacl);
 472         if (!acl_aixc)
 473                 return -1;
 474
 475         rc = aclx_put(
 476                 (char *)name,
 477                 SET_ACL, /* set only the ACL, not mode bits */
 478                 acl_type_info,
 479                 acl_aixc,
 480                 acl_aixc->acl_len,
 481                 0
 482         );
 483         if (rc) {
 484                 DEBUG(2, ("aclx_put failed with %s for %s\n",
 485                         strerror(errno), name));
 486                 return -1;
 487         }
 488
 489         return 0;
 490 }
 491
 492 int aixjfs2_sys_acl_set_fd(vfs_handle_struct *handle,
 493                             files_struct *fsp,
 494                             SMB_ACL_T theacl)
 495 {
 496         struct acl      *acl_aixc;
 497         acl_type_t      acl_type_info;
 498         int     rc;
 499
 500         DEBUG(10, ("aixjfs2_sys_acl_set_fd invoked for %s", fsp_str_dbg(fsp)));
 501
 502         rc = aixjfs2_query_acl_support(fsp->fsp_name->base_name, ACL_AIXC,
 503                                        &acl_type_info);
 504         if (rc) {
 505                 DEBUG(8, ("jfs2_set_nt_acl: AIXC support not found\n"));
 506                 return -1;
 507         }
 508
 509         acl_aixc = aixacl_smb_to_aixacl(SMB_ACL_TYPE_ACCESS, theacl);
 510         if (!acl_aixc)
 511                 return -1;
 512
 513         rc = aclx_fput(
 514                 fsp->fh->fd,
 515                 SET_ACL, /* set only the ACL, not mode bits */
 516                 acl_type_info,
 517                 acl_aixc,
 518                 acl_aixc->acl_len,
 519                 0
 520         );
 521         if (rc) {
 522                 DEBUG(2, ("aclx_fput failed with %s for %s\n",
 523                         strerror(errno), fsp_str_dbg(fsp)));
 524                 return -1;
 525         }
 526
 527         return 0;
 528 }
 529
 530 int aixjfs2_sys_acl_delete_def_file(vfs_handle_struct *handle,
 531                                      const char *path)
 532 {
 533         /* Not available under AIXC ACL */
 534         /* Don't report here any error otherwise */
 535         /* upper layer will break the normal execution */
 536         return 0;
 537 }
 538
 539 static struct vfs_fn_pointers vfs_aixacl2_fns = {
 540         .fget_nt_acl_fn = aixjfs2_fget_nt_acl,
 541         .get_nt_acl_fn = aixjfs2_get_nt_acl,
 542         .fset_nt_acl_fn = aixjfs2_fset_nt_acl,
 543         .sys_acl_get_file_fn = aixjfs2_sys_acl_get_file,
 544         .sys_acl_get_fd_fn = aixjfs2_sys_acl_get_fd,
 545         .sys_acl_blob_get_file_fn = aixjfs2_sys_acl_blob_get_file,
 546         .sys_acl_blob_get_fd_fn = aixjfs2_sys_acl_blob_get_fd,
 547         .sys_acl_set_file_fn = aixjfs2_sys_acl_set_file,
 548         .sys_acl_set_fd_fn = aixjfs2_sys_acl_set_fd,
 549         .sys_acl_delete_def_file_fn = aixjfs2_sys_acl_delete_def_file
 550 };
 551
 552 NTSTATUS vfs_aixacl2_init(void);
 553 NTSTATUS vfs_aixacl2_init(void)
 554 {
 555         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, AIXACL2_MODULE_NAME,
 556                                 &vfs_aixacl2_fns);
 557 }