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(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();
 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 security_info,
 158         TALLOC_CTX *mem_ctx,
 159         struct security_descriptor **ppdesc)
 160 {
 161         SMB4ACL_T *pacl = NULL;
 162         bool    result;
 163         bool    retryPosix = False;
 164
 165         *ppdesc = NULL;
 166         result = aixjfs2_get_nfs4_acl(fsp->fsp_name->base_name, &pacl,
 167                                       &retryPosix);
 168         if (retryPosix)
 169         {
 170                 DEBUG(10, ("retrying with posix acl...\n"));
 171                 return posix_fget_nt_acl(fsp, security_info,
 172                                          mem_ctx, ppdesc);
 173         }
 174         if (result==False)
 175                 return NT_STATUS_ACCESS_DENIED;
 176
 177         return smb_fget_nt_acl_nfs4(fsp, security_info, ppdesc,
 178                                     mem_ctx, pacl);
 179 }
 180
 181 static NTSTATUS aixjfs2_get_nt_acl(vfs_handle_struct *handle,
 182         const char *name,
 183         uint32 security_info,
 184         TALLOC_CTX *mem_ctx,
 185         struct security_descriptor **ppdesc)
 186 {
 187         SMB4ACL_T *pacl = NULL;
 188         bool    result;
 189         bool    retryPosix = False;
 190
 191         *ppdesc = NULL;
 192         result = aixjfs2_get_nfs4_acl(name, &pacl, &retryPosix);
 193         if (retryPosix)
 194         {
 195                 DEBUG(10, ("retrying with posix acl...\n"));
 196                 return posix_get_nt_acl(handle->conn, name, security_info,
 197                                         mem_ctx, ppdesc);
 198         }
 199         if (result==False)
 200                 return NT_STATUS_ACCESS_DENIED;
 201
 202         return smb_get_nt_acl_nfs4(handle->conn, name, security_info,
 203                                    mem_ctx, ppdesc,
 204                                    pacl);
 205 }
 206
 207 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)
 208 {
 209         SMB4ACL_T *pacl = NULL;
 210         bool    result;
 211         bool    retryPosix = False;
 212
 213         *ppdesc = NULL;
 214         result = aixjfs2_get_nfs4_acl(path_p, &pacl, &retryPosix);
 215         if (retryPosix)
 216         {
 217                 return posix_sys_acl_blob_get_file(handle, path_p, mem_ctx,
 218                                                    blob_description, blob);
 219         }
 220         /* Now way to linarlise NFS4 ACLs at the moment, but the NT ACL is pretty close in this case */
 221         errno = ENOSYS;
 222         return -1;
 223 }
 224
 225 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)
 226 {
 227         SMB4ACL_T *pacl = NULL;
 228         bool    result;
 229         bool    retryPosix = False;
 230
 231         result = aixjfs2_get_nfs4_acl(fsp->fsp_name->base_name, &pacl,
 232                                       &retryPosix);
 233         if (retryPosix)
 234         {
 235                 return posix_sys_acl_blob_get_fd(handle, fsp, mem_ctx, blob_description, blob);
 236         }
 237
 238         /* Now way to linarlise NFS4 ACLs at the moment, but the NT ACL is pretty close in this case */
 239         errno = ENOSYS;
 240         return -1;
 241 }
 242
 243 static SMB_ACL_T aixjfs2_get_posix_acl(const char *path, acl_type_t type, TALLOC_CTX *mem_ctx)
 244 {
 245         aixc_acl_t *pacl;
 246         AIXJFS2_ACL_T *acl;
 247         SMB_ACL_T result = NULL;
 248         int ret;
 249
 250         acl = aixjfs2_getacl_alloc(path, &type);
 251
 252         if (acl == NULL) {
 253                 DEBUG(10, ("aixjfs2_getacl failed for %s with %s\n",
 254                            path, strerror(errno)));
 255                 if (errno == 0) {
 256                         errno = EINVAL;
 257                 }
 258                 goto done;
 259         }
 260
 261         pacl = &acl->aixc_acl[0];
 262         DEBUG(10, ("len: %d, mode: %d\n",
 263                    pacl->acl_len, pacl->acl_mode));
 264
 265         result = aixacl_to_smbacl(pacl, mem_ctx);
 266         if (result == NULL) {
 267                 goto done;
 268         }
 269
 270  done:
 271         if (errno != 0) {
 272                 TALLOC_FREE(result);
 273         }
 274         return result;
 275 }
 276
 277 SMB_ACL_T aixjfs2_sys_acl_get_file(vfs_handle_struct *handle,
 278                                     const char *path_p,
 279                                    SMB_ACL_TYPE_T type,
 280                                    TALLOC_CTX *mem_ctx)
 281 {
 282         acl_type_t aixjfs2_type;
 283
 284         switch(type) {
 285         case SMB_ACL_TYPE_ACCESS:
 286                 aixjfs2_type.u64 = ACL_AIXC;
 287                 break;
 288         case SMB_ACL_TYPE_DEFAULT:
 289                 DEBUG(0, ("Got AIX JFS2 unsupported type: %d\n", type));
 290                 return NULL;
 291         default:
 292                 DEBUG(0, ("Got invalid type: %d\n", type));
 293                 smb_panic("exiting");
 294         }
 295
 296         return aixjfs2_get_posix_acl(path_p, aixjfs2_type, mem_ctx);
 297 }
 298
 299 SMB_ACL_T aixjfs2_sys_acl_get_fd(vfs_handle_struct *handle,
 300                                   files_struct *fsp)
 301 {
 302         acl_type_t aixjfs2_type;
 303         aixjfs2_type.u64 = ACL_AIXC;
 304
 305         return aixjfs2_get_posix_acl(fsp->fsp_name->base_name, aixjfs2_type);
 306 }
 307
 308 /*
 309  * Test whether we have that aclType support on the given path
 310  */
 311 static int aixjfs2_query_acl_support(
 312         char *filepath,
 313         uint64_t aclType,
 314         acl_type_t *pacl_type_info
 315 )
 316 {
 317         acl_types_list_t        acl_type_list;
 318         size_t  acl_type_list_len = sizeof(acl_types_list_t);
 319         uint32_t        i;
 320
 321         memset(&acl_type_list, 0, sizeof(acl_type_list));
 322
 323         if (aclx_gettypes(filepath, &acl_type_list, &acl_type_list_len)) {
 324                 DEBUG(2, ("aclx_gettypes failed with error %s for %s\n",
 325                         strerror(errno), filepath));
 326                 return -1;
 327         }
 328
 329         for(i=0; i<acl_type_list.num_entries; i++) {
 330                 if (acl_type_list.entries[i].u64==aclType) {
 331                         memcpy(pacl_type_info, acl_type_list.entries + i, sizeof(acl_type_t));
 332                         DEBUG(10, ("found %s ACL support for %s\n",
 333                                 pacl_type_info->acl_type, filepath));
 334                         return 0;
 335                 }
 336         }
 337
 338         return 1; /* haven't found that ACL type. */
 339 }
 340
 341 static bool aixjfs2_process_smbacl(files_struct *fsp, SMB4ACL_T *smbacl)
 342 {
 343         SMB4ACE_T       *smbace;
 344         TALLOC_CTX      *mem_ctx;
 345         nfs4_acl_int_t  *jfs2acl;
 346         int32_t entryLen;
 347         uint32  aclLen, naces;
 348         int     rc;
 349         acl_type_t      acltype;
 350
 351         DEBUG(10, ("jfs2_process_smbacl invoked on %s\n", fsp_str_dbg(fsp)));
 352
 353         /* no need to be freed which is alloced with mem_ctx */
 354         mem_ctx = talloc_tos();
 355
 356         entryLen = sizeof(nfs4_ace_int_t);
 357         if (entryLen & 0x03)
 358                 entryLen = entryLen + 4 - (entryLen%4);
 359
 360         naces = smb_get_naces(smbacl);
 361         aclLen = ACL_V4_SIZ + naces * entryLen;
 362         jfs2acl = (nfs4_acl_int_t *)TALLOC_SIZE(mem_ctx, aclLen);
 363         if (jfs2acl==NULL) {
 364                 DEBUG(0, ("TALLOC_SIZE failed\n"));
 365                 errno = ENOMEM;
 366                 return False;
 367         }
 368
 369         jfs2acl->aclLength = ACL_V4_SIZ;
 370         jfs2acl->aclVersion = NFS4_ACL_INT_STRUCT_VERSION;
 371         jfs2acl->aclEntryN = 0;
 372
 373         for(smbace = smb_first_ace4(smbacl); smbace!=NULL; smbace = smb_next_ace4(smbace))
 374         {
 375                 SMB_ACE4PROP_T *aceprop = smb_get_ace4(smbace);
 376                 nfs4_ace_int_t *jfs2_ace = (nfs4_ace_int_t *)(((char *)jfs2acl) + jfs2acl->aclLength);
 377
 378                 memset(jfs2_ace, 0, entryLen);
 379                 jfs2_ace->entryLen = entryLen; /* won't store textual "who" */
 380                 jfs2_ace->aceType = aceprop->aceType; /* only ACCES|DENY supported by jfs2 */
 381                 jfs2_ace->aceFlags = aceprop->aceFlags;
 382                 jfs2_ace->aceMask = aceprop->aceMask;
 383                 jfs2_ace->flags = (aceprop->flags&SMB_ACE4_ID_SPECIAL) ? ACE4_ID_SPECIAL : 0;
 384
 385                 /* don't care it's real content is only 16 or 32 bit */
 386                 jfs2_ace->aceWho.id = aceprop->who.id;
 387
 388                 /* iterate to the next jfs2 ace */
 389                 jfs2acl->aclLength += jfs2_ace->entryLen;
 390                 jfs2acl->aclEntryN++;
 391         }
 392         SMB_ASSERT(jfs2acl->aclEntryN==naces);
 393
 394         /* Don't query it (again) */
 395         memset(&acltype, 0, sizeof(acl_type_t));
 396         acltype.u64 = ACL_NFS4;
 397
 398         /* won't set S_ISUID - the only one JFS2/NFS4 accepts */
 399         rc = aclx_put(
 400                 fsp->fsp_name->base_name,
 401                 SET_ACL, /* set only the ACL, not mode bits */
 402                 acltype, /* not a pointer !!! */
 403                 jfs2acl,
 404                 jfs2acl->aclLength,
 405                 0 /* don't set here mode bits */
 406         );
 407         if (rc) {
 408                 DEBUG(8, ("aclx_put failed with %s\n", strerror(errno)));
 409                 return False;
 410         }
 411
 412         DEBUG(10, ("jfs2_process_smbacl succeeded.\n"));
 413         return True;
 414 }
 415
 416 static NTSTATUS aixjfs2_set_nt_acl_common(files_struct *fsp, uint32 security_info_sent, const struct security_descriptor *psd)
 417 {
 418         acl_type_t      acl_type_info;
 419         NTSTATUS        result = NT_STATUS_ACCESS_DENIED;
 420         int     rc;
 421
 422         rc = aixjfs2_query_acl_support(
 423                 fsp->fsp_name,
 424                 ACL_NFS4,
 425                 &acl_type_info);
 426
 427         if (rc==0)
 428         {
 429                 result = smb_set_nt_acl_nfs4(
 430                         fsp, security_info_sent, psd,
 431                         aixjfs2_process_smbacl);
 432         } else if (rc==1) { /* assume POSIX ACL - by default... */
 433                 result = set_nt_acl(fsp, security_info_sent, psd);
 434         } else
 435                 result = map_nt_error_from_unix(errno); /* query failed */
 436
 437         return result;
 438 }
 439
 440 NTSTATUS aixjfs2_fset_nt_acl(vfs_handle_struct *handle, files_struct *fsp, uint32 security_info_sent, const struct security_descriptor *psd)
 441 {
 442         return aixjfs2_set_nt_acl_common(fsp, security_info_sent, psd);
 443 }
 444
 445 int aixjfs2_sys_acl_set_file(vfs_handle_struct *handle,
 446                               const char *name,
 447                               SMB_ACL_TYPE_T type,
 448                               SMB_ACL_T theacl)
 449 {
 450         struct acl      *acl_aixc;
 451         acl_type_t      acl_type_info;
 452         int     rc;
 453
 454         DEBUG(10, ("aixjfs2_sys_acl_set_file invoked for %s", name));
 455
 456         rc = aixjfs2_query_acl_support((char *)name, ACL_AIXC, &acl_type_info);
 457         if (rc) {
 458                 DEBUG(8, ("jfs2_set_nt_acl: AIXC support not found\n"));
 459                 return -1;
 460         }
 461
 462         acl_aixc = aixacl_smb_to_aixacl(type, theacl);
 463         if (!acl_aixc)
 464                 return -1;
 465
 466         rc = aclx_put(
 467                 (char *)name,
 468                 SET_ACL, /* set only the ACL, not mode bits */
 469                 acl_type_info,
 470                 acl_aixc,
 471                 acl_aixc->acl_len,
 472                 0
 473         );
 474         if (rc) {
 475                 DEBUG(2, ("aclx_put failed with %s for %s\n",
 476                         strerror(errno), name));
 477                 return -1;
 478         }
 479
 480         return 0;
 481 }
 482
 483 int aixjfs2_sys_acl_set_fd(vfs_handle_struct *handle,
 484                             files_struct *fsp,
 485                             SMB_ACL_T theacl)
 486 {
 487         struct acl      *acl_aixc;
 488         acl_type_t      acl_type_info;
 489         int     rc;
 490
 491         DEBUG(10, ("aixjfs2_sys_acl_set_fd invoked for %s", fsp_str_dbg(fsp)));
 492
 493         rc = aixjfs2_query_acl_support(fsp->fsp_name->base_name, ACL_AIXC,
 494                                        &acl_type_info);
 495         if (rc) {
 496                 DEBUG(8, ("jfs2_set_nt_acl: AIXC support not found\n"));
 497                 return -1;
 498         }
 499
 500         acl_aixc = aixacl_smb_to_aixacl(SMB_ACL_TYPE_ACCESS, theacl);
 501         if (!acl_aixc)
 502                 return -1;
 503
 504         rc = aclx_fput(
 505                 fsp->fh->fd,
 506                 SET_ACL, /* set only the ACL, not mode bits */
 507                 acl_type_info,
 508                 acl_aixc,
 509                 acl_aixc->acl_len,
 510                 0
 511         );
 512         if (rc) {
 513                 DEBUG(2, ("aclx_fput failed with %s for %s\n",
 514                         strerror(errno), fsp_str_dbg(fsp)));
 515                 return -1;
 516         }
 517
 518         return 0;
 519 }
 520
 521 int aixjfs2_sys_acl_delete_def_file(vfs_handle_struct *handle,
 522                                      const char *path)
 523 {
 524         /* Not available under AIXC ACL */
 525         /* Don't report here any error otherwise */
 526         /* upper layer will break the normal execution */
 527         return 0;
 528 }
 529
 530 static struct vfs_fn_pointers vfs_aixacl2_fns = {
 531         .fget_nt_acl_fn = aixjfs2_fget_nt_acl,
 532         .get_nt_acl_fn = aixjfs2_get_nt_acl,
 533         .fset_nt_acl_fn = aixjfs2_fset_nt_acl,
 534         .sys_acl_get_file_fn = aixjfs2_sys_acl_get_file,
 535         .sys_acl_get_fd_fn = aixjfs2_sys_acl_get_fd,
 536         .sys_acl_blob_get_file_fn = aixjfs2_sys_acl_blob_get_file,
 537         .sys_acl_blob_get_fd_fn = aixjfs2_sys_acl_blob_get_fd,
 538         .sys_acl_set_file_fn = aixjfs2_sys_acl_set_file,
 539         .sys_acl_set_fd_fn = aixjfs2_sys_acl_set_fd,
 540         .sys_acl_delete_def_file_fn = aixjfs2_sys_acl_delete_def_file
 541 };
 542
 543 NTSTATUS vfs_aixacl2_init(void);
 544 NTSTATUS vfs_aixacl2_init(void)
 545 {
 546         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, AIXACL2_MODULE_NAME,
 547                                 &vfs_aixacl2_fns);
 548 }