source/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 "nfs4_acls.h"
  22
  23 #undef DBGC_CLASS
  24 #define DBGC_CLASS DBGC_VFS
  25
  26 #define AIXACL2_MODULE_NAME "aixacl2"
  27
  28 extern int try_chown(connection_struct *conn, const char *fname, uid_t uid, gid_t gid);
  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         SEC_DESC **ppdesc)
 161 {
 162         SMB4ACL_T *pacl = NULL;
 163         bool    result;
 164         bool    retryPosix = False;
 165
 166         *ppdesc = NULL;
 167         result = aixjfs2_get_nfs4_acl(fsp->fsp_name, &pacl, &retryPosix);
 168         if (retryPosix)
 169         {
 170                 DEBUG(10, ("retrying with posix acl...\n"));
 171                 return posix_fget_nt_acl(fsp, security_info, ppdesc);
 172         }
 173         if (result==False)
 174                 return NT_STATUS_ACCESS_DENIED;
 175
 176         return smb_fget_nt_acl_nfs4(fsp, security_info, ppdesc, pacl);
 177 }
 178
 179 static NTSTATUS aixjfs2_get_nt_acl(vfs_handle_struct *handle,
 180         const char *name,
 181         uint32 security_info, SEC_DESC **ppdesc)
 182 {
 183         SMB4ACL_T *pacl = NULL;
 184         bool    result;
 185         bool    retryPosix = False;
 186
 187         *ppdesc = NULL;
 188         result = aixjfs2_get_nfs4_acl(name, &pacl, &retryPosix);
 189         if (retryPosix)
 190         {
 191                 DEBUG(10, ("retrying with posix acl...\n"));
 192                 return posix_get_nt_acl(handle->conn, name, security_info,
 193                                         ppdesc);
 194         }
 195         if (result==False)
 196                 return NT_STATUS_ACCESS_DENIED;
 197
 198         return smb_get_nt_acl_nfs4(handle->conn, name, security_info, ppdesc,
 199                                    pacl);
 200 }
 201
 202 static SMB_ACL_T aixjfs2_get_posix_acl(const char *path, acl_type_t type)
 203 {
 204         aixc_acl_t *pacl;
 205         AIXJFS2_ACL_T *acl;
 206         SMB_ACL_T result = NULL;
 207         int ret;
 208
 209         acl = aixjfs2_getacl_alloc(path, &type);
 210
 211         if (acl == NULL) {
 212                 DEBUG(10, ("aixjfs2_getacl failed for %s with %s\n",
 213                            path, strerror(errno)));
 214                 if (errno == 0) {
 215                         errno = EINVAL;
 216                 }
 217                 goto done;
 218         }
 219
 220         pacl = &acl->aixc_acl[0];
 221         DEBUG(10, ("len: %d, mode: %d\n",
 222                    pacl->acl_len, pacl->acl_mode));
 223
 224         result = aixacl_to_smbacl(pacl);
 225         if (result == NULL) {
 226                 goto done;
 227         }
 228
 229  done:
 230         if (errno != 0) {
 231                 SAFE_FREE(result);
 232         }
 233         return result;
 234 }
 235
 236 SMB_ACL_T aixjfs2_sys_acl_get_file(vfs_handle_struct *handle,
 237                                     const char *path_p,
 238                                     SMB_ACL_TYPE_T type)
 239 {
 240         acl_type_t aixjfs2_type;
 241
 242         switch(type) {
 243         case SMB_ACL_TYPE_ACCESS:
 244                 aixjfs2_type.u64 = ACL_AIXC;
 245                 break;
 246         case SMB_ACL_TYPE_DEFAULT:
 247                 DEBUG(0, ("Got AIX JFS2 unsupported type: %d\n", type));
 248                 return NULL;
 249         default:
 250                 DEBUG(0, ("Got invalid type: %d\n", type));
 251                 smb_panic("exiting");
 252         }
 253
 254         return aixjfs2_get_posix_acl(path_p, aixjfs2_type);
 255 }
 256
 257 SMB_ACL_T aixjfs2_sys_acl_get_fd(vfs_handle_struct *handle,
 258                                   files_struct *fsp)
 259 {
 260         acl_type_t aixjfs2_type;
 261         aixjfs2_type.u64 = ACL_AIXC;
 262
 263         return aixjfs2_get_posix_acl(fsp->fsp_name, aixjfs2_type);
 264 }
 265
 266 /*
 267  * Test whether we have that aclType support on the given path
 268  */
 269 static int aixjfs2_query_acl_support(
 270         char *filepath,
 271         uint64_t aclType,
 272         acl_type_t *pacl_type_info
 273 )
 274 {
 275         acl_types_list_t        acl_type_list;
 276         size_t  acl_type_list_len = sizeof(acl_types_list_t);
 277         uint32_t        i;
 278
 279         memset(&acl_type_list, 0, sizeof(acl_type_list));
 280
 281         if (aclx_gettypes(filepath, &acl_type_list, &acl_type_list_len)) {
 282                 DEBUG(2, ("aclx_gettypes failed with error %s for %s\n",
 283                         strerror(errno), filepath));
 284                 return -1;
 285         }
 286
 287         for(i=0; i<acl_type_list.num_entries; i++) {
 288                 if (acl_type_list.entries[i].u64==aclType) {
 289                         memcpy(pacl_type_info, acl_type_list.entries + i, sizeof(acl_type_t));
 290                         DEBUG(10, ("found %s ACL support for %s\n",
 291                                 pacl_type_info->acl_type, filepath));
 292                         return 0;
 293                 }
 294         }
 295
 296         return 1; /* haven't found that ACL type. */
 297 }
 298
 299 static bool aixjfs2_process_smbacl(files_struct *fsp, SMB4ACL_T *smbacl)
 300 {
 301         SMB4ACE_T       *smbace;
 302         TALLOC_CTX      *mem_ctx;
 303         nfs4_acl_int_t  *jfs2acl;
 304         int32_t entryLen;
 305         uint32  aclLen, naces;
 306         int     rc;
 307         acl_type_t      acltype;
 308
 309         DEBUG(10, ("jfs2_process_smbacl invoked on %s\n", fsp->fsp_name));
 310
 311         /* no need to be freed which is alloced with mem_ctx */
 312         mem_ctx = talloc_tos();
 313
 314         entryLen = sizeof(nfs4_ace_int_t);
 315         if (entryLen & 0x03)
 316                 entryLen = entryLen + 4 - (entryLen%4);
 317
 318         naces = smb_get_naces(smbacl);
 319         aclLen = ACL_V4_SIZ + naces * entryLen;
 320         jfs2acl = (nfs4_acl_int_t *)TALLOC_SIZE(mem_ctx, aclLen);
 321         if (jfs2acl==NULL) {
 322                 DEBUG(0, ("TALLOC_SIZE failed\n"));
 323                 errno = ENOMEM;
 324                 return False;
 325         }
 326
 327         jfs2acl->aclLength = ACL_V4_SIZ;
 328         jfs2acl->aclVersion = NFS4_ACL_INT_STRUCT_VERSION;
 329         jfs2acl->aclEntryN = 0;
 330
 331         for(smbace = smb_first_ace4(smbacl); smbace!=NULL; smbace = smb_next_ace4(smbace))
 332         {
 333                 SMB_ACE4PROP_T *aceprop = smb_get_ace4(smbace);
 334                 nfs4_ace_int_t *jfs2_ace = (nfs4_ace_int_t *)(((char *)jfs2acl) + jfs2acl->aclLength);
 335
 336                 memset(jfs2_ace, 0, entryLen);
 337                 jfs2_ace->entryLen = entryLen; /* won't store textual "who" */
 338                 jfs2_ace->aceType = aceprop->aceType; /* only ACCES|DENY supported by jfs2 */
 339                 jfs2_ace->aceFlags = aceprop->aceFlags;
 340                 jfs2_ace->aceMask = aceprop->aceMask;
 341                 jfs2_ace->flags = (aceprop->flags&SMB_ACE4_ID_SPECIAL) ? ACE4_ID_SPECIAL : 0;
 342
 343                 /* don't care it's real content is only 16 or 32 bit */
 344                 jfs2_ace->aceWho.id = aceprop->who.id;
 345
 346                 /* iterate to the next jfs2 ace */
 347                 jfs2acl->aclLength += jfs2_ace->entryLen;
 348                 jfs2acl->aclEntryN++;
 349         }
 350         SMB_ASSERT(jfs2acl->aclEntryN==naces);
 351
 352         /* Don't query it (again) */
 353         memset(&acltype, 0, sizeof(acl_type_t));
 354         acltype.u64 = ACL_NFS4;
 355
 356         /* won't set S_ISUID - the only one JFS2/NFS4 accepts */
 357         rc = aclx_put(
 358                 fsp->fsp_name,
 359                 SET_ACL, /* set only the ACL, not mode bits */
 360                 acltype, /* not a pointer !!! */
 361                 jfs2acl,
 362                 jfs2acl->aclLength,
 363                 0 /* don't set here mode bits */
 364         );
 365         if (rc) {
 366                 DEBUG(8, ("aclx_put failed with %s\n", strerror(errno)));
 367                 return False;
 368         }
 369
 370         DEBUG(10, ("jfs2_process_smbacl succeeded.\n"));
 371         return True;
 372 }
 373
 374 static NTSTATUS aixjfs2_set_nt_acl_common(files_struct *fsp, uint32 security_info_sent, SEC_DESC *psd)
 375 {
 376         acl_type_t      acl_type_info;
 377         NTSTATUS        result = NT_STATUS_ACCESS_DENIED;
 378         int     rc;
 379
 380         rc = aixjfs2_query_acl_support(
 381                 fsp->fsp_name,
 382                 ACL_NFS4,
 383                 &acl_type_info);
 384
 385         if (rc==0)
 386         {
 387                 result = smb_set_nt_acl_nfs4(
 388                         fsp, security_info_sent, psd,
 389                         aixjfs2_process_smbacl);
 390         } else if (rc==1) { /* assume POSIX ACL - by default... */
 391                 result = set_nt_acl(fsp, security_info_sent, psd);
 392         } else
 393                 result = map_nt_error_from_unix(errno); /* query failed */
 394
 395         return result;
 396 }
 397
 398 NTSTATUS aixjfs2_fset_nt_acl(vfs_handle_struct *handle, files_struct *fsp, uint32 security_info_sent, SEC_DESC *psd)
 399 {
 400         return aixjfs2_set_nt_acl_common(fsp, security_info_sent, psd);
 401 }
 402
 403 int aixjfs2_sys_acl_set_file(vfs_handle_struct *handle,
 404                               const char *name,
 405                               SMB_ACL_TYPE_T type,
 406                               SMB_ACL_T theacl)
 407 {
 408         struct acl      *acl_aixc;
 409         acl_type_t      acl_type_info;
 410         int     rc;
 411
 412         DEBUG(10, ("aixjfs2_sys_acl_set_file invoked for %s", name));
 413
 414         rc = aixjfs2_query_acl_support((char *)name, ACL_AIXC, &acl_type_info);
 415         if (rc) {
 416                 DEBUG(8, ("jfs2_set_nt_acl: AIXC support not found\n"));
 417                 return -1;
 418         }
 419
 420         acl_aixc = aixacl_smb_to_aixacl(type, theacl);
 421         if (!acl_aixc)
 422                 return -1;
 423
 424         rc = aclx_put(
 425                 (char *)name,
 426                 SET_ACL, /* set only the ACL, not mode bits */
 427                 acl_type_info,
 428                 acl_aixc,
 429                 acl_aixc->acl_len,
 430                 0
 431         );
 432         if (rc) {
 433                 DEBUG(2, ("aclx_put failed with %s for %s\n",
 434                         strerror(errno), name));
 435                 return -1;
 436         }
 437
 438         return 0;
 439 }
 440
 441 int aixjfs2_sys_acl_set_fd(vfs_handle_struct *handle,
 442                             files_struct *fsp,
 443                             SMB_ACL_T theacl)
 444 {
 445         struct acl      *acl_aixc;
 446         acl_type_t      acl_type_info;
 447         int     rc;
 448
 449         DEBUG(10, ("aixjfs2_sys_acl_set_fd invoked for %s", fsp->fsp_name));
 450
 451         rc = aixjfs2_query_acl_support(fsp->fsp_name, ACL_AIXC, &acl_type_info);
 452         if (rc) {
 453                 DEBUG(8, ("jfs2_set_nt_acl: AIXC support not found\n"));
 454                 return -1;
 455         }
 456
 457         acl_aixc = aixacl_smb_to_aixacl(SMB_ACL_TYPE_ACCESS, theacl);
 458         if (!acl_aixc)
 459                 return -1;
 460
 461         rc = aclx_fput(
 462                 fsp->fh->fd,
 463                 SET_ACL, /* set only the ACL, not mode bits */
 464                 acl_type_info,
 465                 acl_aixc,
 466                 acl_aixc->acl_len,
 467                 0
 468         );
 469         if (rc) {
 470                 DEBUG(2, ("aclx_fput failed with %s for %s\n",
 471                         strerror(errno), fsp->fsp_name));
 472                 return -1;
 473         }
 474
 475         return 0;
 476 }
 477
 478 int aixjfs2_sys_acl_delete_def_file(vfs_handle_struct *handle,
 479                                      const char *path)
 480 {
 481         /* Not available under AIXC ACL */
 482         /* Don't report here any error otherwise */
 483         /* upper layer will break the normal execution */
 484         return 0;
 485 }
 486
 487
 488 /* VFS operations structure */
 489
 490 static vfs_op_tuple aixjfs2_ops[] =
 491 {
 492         {SMB_VFS_OP(aixjfs2_fget_nt_acl),
 493         SMB_VFS_OP_FGET_NT_ACL,
 494         SMB_VFS_LAYER_TRANSPARENT},
 495
 496         {SMB_VFS_OP(aixjfs2_get_nt_acl),
 497         SMB_VFS_OP_GET_NT_ACL,
 498         SMB_VFS_LAYER_TRANSPARENT},
 499
 500         {SMB_VFS_OP(aixjfs2_fset_nt_acl),
 501         SMB_VFS_OP_FSET_NT_ACL,
 502         SMB_VFS_LAYER_TRANSPARENT},
 503
 504         {SMB_VFS_OP(aixjfs2_sys_acl_get_file),
 505         SMB_VFS_OP_SYS_ACL_GET_FILE,
 506         SMB_VFS_LAYER_TRANSPARENT},
 507
 508         {SMB_VFS_OP(aixjfs2_sys_acl_get_fd),
 509         SMB_VFS_OP_SYS_ACL_GET_FD,
 510         SMB_VFS_LAYER_TRANSPARENT},
 511
 512         {SMB_VFS_OP(aixjfs2_sys_acl_set_file),
 513         SMB_VFS_OP_SYS_ACL_SET_FILE,
 514         SMB_VFS_LAYER_TRANSPARENT},
 515
 516         {SMB_VFS_OP(aixjfs2_sys_acl_set_fd),
 517         SMB_VFS_OP_SYS_ACL_SET_FD,
 518         SMB_VFS_LAYER_TRANSPARENT},
 519
 520         {SMB_VFS_OP(aixjfs2_sys_acl_delete_def_file),
 521         SMB_VFS_OP_SYS_ACL_DELETE_DEF_FILE,
 522         SMB_VFS_LAYER_TRANSPARENT},
 523
 524         {SMB_VFS_OP(NULL),
 525         SMB_VFS_OP_NOOP,
 526         SMB_VFS_LAYER_NOOP}
 527 };
 528
 529 NTSTATUS vfs_aixacl2_init(void);
 530 NTSTATUS vfs_aixacl2_init(void)
 531 {
 532         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, AIXACL2_MODULE_NAME,
 533                                 aixjfs2_ops);
 534 }