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         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         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         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         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         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, files_struct *fsp, SMB4ACL_T *smbacl)
 349 {
 350         SMB4ACE_T       *smbace;
 351         TALLOC_CTX      *mem_ctx;
 352         nfs4_acl_int_t  *jfs2acl;
 353         int32_t         entryLen;
 354         uint32_t        aclLen, naces;
 355         int             rc;
 356         acl_type_t      acltype;
 357
 358         DEBUG(10, ("jfs2_process_smbacl invoked on %s\n", fsp_str_dbg(fsp)));
 359
 360         /* no need to be freed which is alloced with mem_ctx */
 361         mem_ctx = talloc_tos();
 362
 363         entryLen = sizeof(nfs4_ace_int_t);
 364         if (entryLen & 0x03)
 365                 entryLen = entryLen + 4 - (entryLen%4);
 366
 367         naces = smb_get_naces(smbacl);
 368         aclLen = ACL_V4_SIZ + naces * entryLen;
 369         jfs2acl = (nfs4_acl_int_t *)TALLOC_SIZE(mem_ctx, aclLen);
 370         if (jfs2acl==NULL) {
 371                 DEBUG(0, ("TALLOC_SIZE failed\n"));
 372                 errno = ENOMEM;
 373                 return False;
 374         }
 375
 376         jfs2acl->aclLength = ACL_V4_SIZ;
 377         jfs2acl->aclVersion = NFS4_ACL_INT_STRUCT_VERSION;
 378         jfs2acl->aclEntryN = 0;
 379
 380         for(smbace = smb_first_ace4(smbacl); smbace!=NULL; smbace = smb_next_ace4(smbace))
 381         {
 382                 SMB_ACE4PROP_T *aceprop = smb_get_ace4(smbace);
 383                 nfs4_ace_int_t *jfs2_ace = (nfs4_ace_int_t *)(((char *)jfs2acl) + jfs2acl->aclLength);
 384
 385                 memset(jfs2_ace, 0, entryLen);
 386                 jfs2_ace->entryLen = entryLen; /* won't store textual "who" */
 387                 jfs2_ace->aceType = aceprop->aceType; /* only ACCES|DENY supported by jfs2 */
 388                 jfs2_ace->aceFlags = aceprop->aceFlags;
 389                 jfs2_ace->aceMask = aceprop->aceMask;
 390                 jfs2_ace->flags = (aceprop->flags&SMB_ACE4_ID_SPECIAL) ? ACE4_ID_SPECIAL : 0;
 391
 392                 /* don't care it's real content is only 16 or 32 bit */
 393                 jfs2_ace->aceWho.id = aceprop->who.id;
 394
 395                 /* iterate to the next jfs2 ace */
 396                 jfs2acl->aclLength += jfs2_ace->entryLen;
 397                 jfs2acl->aclEntryN++;
 398         }
 399         SMB_ASSERT(jfs2acl->aclEntryN==naces);
 400
 401         /* Don't query it (again) */
 402         memset(&acltype, 0, sizeof(acl_type_t));
 403         acltype.u64 = ACL_NFS4;
 404
 405         /* won't set S_ISUID - the only one JFS2/NFS4 accepts */
 406         rc = aclx_put(
 407                 fsp->fsp_name->base_name,
 408                 SET_ACL, /* set only the ACL, not mode bits */
 409                 acltype, /* not a pointer !!! */
 410                 jfs2acl,
 411                 jfs2acl->aclLength,
 412                 0 /* don't set here mode bits */
 413         );
 414         if (rc) {
 415                 DEBUG(8, ("aclx_put failed with %s\n", strerror(errno)));
 416                 return False;
 417         }
 418
 419         DEBUG(10, ("jfs2_process_smbacl succeeded.\n"));
 420         return True;
 421 }
 422
 423 static NTSTATUS aixjfs2_set_nt_acl_common(vfs_handle_struct *handle, files_struct *fsp, uint32_t security_info_sent, const struct security_descriptor *psd)
 424 {
 425         acl_type_t      acl_type_info;
 426         NTSTATUS        result = NT_STATUS_ACCESS_DENIED;
 427         int     rc;
 428
 429         rc = aixjfs2_query_acl_support(
 430                 fsp->fsp_name->base_name,
 431                 ACL_NFS4,
 432                 &acl_type_info);
 433
 434         if (rc==0)
 435         {
 436                 result = smb_set_nt_acl_nfs4(handle,
 437                         fsp, security_info_sent, psd,
 438                         aixjfs2_process_smbacl);
 439         } else if (rc==1) { /* assume POSIX ACL - by default... */
 440                 result = set_nt_acl(fsp, security_info_sent, psd);
 441         } else
 442                 result = map_nt_error_from_unix(errno); /* query failed */
 443
 444         return result;
 445 }
 446
 447 NTSTATUS aixjfs2_fset_nt_acl(vfs_handle_struct *handle, files_struct *fsp, uint32_t security_info_sent, const struct security_descriptor *psd)
 448 {
 449         return aixjfs2_set_nt_acl_common(handle, fsp, security_info_sent, psd);
 450 }
 451
 452 int aixjfs2_sys_acl_set_file(vfs_handle_struct *handle,
 453                               const char *name,
 454                               SMB_ACL_TYPE_T type,
 455                               SMB_ACL_T theacl)
 456 {
 457         struct acl      *acl_aixc;
 458         acl_type_t      acl_type_info;
 459         int     rc;
 460
 461         DEBUG(10, ("aixjfs2_sys_acl_set_file invoked for %s", name));
 462
 463         rc = aixjfs2_query_acl_support((char *)name, ACL_AIXC, &acl_type_info);
 464         if (rc) {
 465                 DEBUG(8, ("jfs2_set_nt_acl: AIXC support not found\n"));
 466                 return -1;
 467         }
 468
 469         acl_aixc = aixacl_smb_to_aixacl(type, theacl);
 470         if (!acl_aixc)
 471                 return -1;
 472
 473         rc = aclx_put(
 474                 (char *)name,
 475                 SET_ACL, /* set only the ACL, not mode bits */
 476                 acl_type_info,
 477                 acl_aixc,
 478                 acl_aixc->acl_len,
 479                 0
 480         );
 481         if (rc) {
 482                 DEBUG(2, ("aclx_put failed with %s for %s\n",
 483                         strerror(errno), name));
 484                 return -1;
 485         }
 486
 487         return 0;
 488 }
 489
 490 int aixjfs2_sys_acl_set_fd(vfs_handle_struct *handle,
 491                             files_struct *fsp,
 492                             SMB_ACL_T theacl)
 493 {
 494         struct acl      *acl_aixc;
 495         acl_type_t      acl_type_info;
 496         int     rc;
 497
 498         DEBUG(10, ("aixjfs2_sys_acl_set_fd invoked for %s", fsp_str_dbg(fsp)));
 499
 500         rc = aixjfs2_query_acl_support(fsp->fsp_name->base_name, ACL_AIXC,
 501                                        &acl_type_info);
 502         if (rc) {
 503                 DEBUG(8, ("jfs2_set_nt_acl: AIXC support not found\n"));
 504                 return -1;
 505         }
 506
 507         acl_aixc = aixacl_smb_to_aixacl(SMB_ACL_TYPE_ACCESS, theacl);
 508         if (!acl_aixc)
 509                 return -1;
 510
 511         rc = aclx_fput(
 512                 fsp->fh->fd,
 513                 SET_ACL, /* set only the ACL, not mode bits */
 514                 acl_type_info,
 515                 acl_aixc,
 516                 acl_aixc->acl_len,
 517                 0
 518         );
 519         if (rc) {
 520                 DEBUG(2, ("aclx_fput failed with %s for %s\n",
 521                         strerror(errno), fsp_str_dbg(fsp)));
 522                 return -1;
 523         }
 524
 525         return 0;
 526 }
 527
 528 int aixjfs2_sys_acl_delete_def_file(vfs_handle_struct *handle,
 529                                      const char *path)
 530 {
 531         /* Not available under AIXC ACL */
 532         /* Don't report here any error otherwise */
 533         /* upper layer will break the normal execution */
 534         return 0;
 535 }
 536
 537 static struct vfs_fn_pointers vfs_aixacl2_fns = {
 538         .fget_nt_acl_fn = aixjfs2_fget_nt_acl,
 539         .get_nt_acl_fn = aixjfs2_get_nt_acl,
 540         .fset_nt_acl_fn = aixjfs2_fset_nt_acl,
 541         .sys_acl_get_file_fn = aixjfs2_sys_acl_get_file,
 542         .sys_acl_get_fd_fn = aixjfs2_sys_acl_get_fd,
 543         .sys_acl_blob_get_file_fn = aixjfs2_sys_acl_blob_get_file,
 544         .sys_acl_blob_get_fd_fn = aixjfs2_sys_acl_blob_get_fd,
 545         .sys_acl_set_file_fn = aixjfs2_sys_acl_set_file,
 546         .sys_acl_set_fd_fn = aixjfs2_sys_acl_set_fd,
 547         .sys_acl_delete_def_file_fn = aixjfs2_sys_acl_delete_def_file
 548 };
 549
 550 NTSTATUS vfs_aixacl2_init(void);
 551 NTSTATUS vfs_aixacl2_init(void)
 552 {
 553         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, AIXACL2_MODULE_NAME,
 554                                 &vfs_aixacl2_fns);
 555 }