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(
 183                 fsp, NULL, security_info, mem_ctx, ppdesc, pacl);
 184         TALLOC_FREE(frame);
 185         return status;
 186 }
 187
 188 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)
 189 {
 190         struct SMB4ACL_T *pacl = NULL;
 191         bool    result;
 192         bool    retryPosix = False;
 193
 194         result = aixjfs2_get_nfs4_acl(mem_ctx, fsp->fsp_name->base_name, &pacl,
 195                                       &retryPosix);
 196         if (retryPosix)
 197         {
 198                 return posix_sys_acl_blob_get_fd(handle, fsp, mem_ctx, blob_description, blob);
 199         }
 200
 201         /* Now way to linarlise NFS4 ACLs at the moment, but the NT ACL is pretty close in this case */
 202         errno = ENOSYS;
 203         return -1;
 204 }
 205
 206 static SMB_ACL_T aixjfs2_get_posix_acl(const char *path, acl_type_t type, TALLOC_CTX *mem_ctx)
 207 {
 208         aixc_acl_t *pacl;
 209         AIXJFS2_ACL_T *acl;
 210         SMB_ACL_T result = NULL;
 211         int ret;
 212
 213         acl = aixjfs2_getacl_alloc(path, &type);
 214
 215         if (acl == NULL) {
 216                 DEBUG(10, ("aixjfs2_getacl failed for %s with %s\n",
 217                            path, strerror(errno)));
 218                 if (errno == 0) {
 219                         errno = EINVAL;
 220                 }
 221                 goto done;
 222         }
 223
 224         pacl = &acl->aixc_acl[0];
 225         DEBUG(10, ("len: %d, mode: %d\n",
 226                    pacl->acl_len, pacl->acl_mode));
 227
 228         result = aixacl_to_smbacl(pacl, mem_ctx);
 229         if (result == NULL) {
 230                 goto done;
 231         }
 232
 233  done:
 234         if (errno != 0) {
 235                 TALLOC_FREE(result);
 236         }
 237         return result;
 238 }
 239
 240 SMB_ACL_T aixjfs2_sys_acl_get_fd(vfs_handle_struct *handle,
 241                                  files_struct *fsp,
 242                                  SMB_ACL_TYPE_T type,
 243                                  TALLOC_CTX *mem_ctx)
 244 {
 245         acl_type_t aixjfs2_type;
 246
 247         switch(type) {
 248         case SMB_ACL_TYPE_ACCESS:
 249                 aixjfs2_type.u64 = ACL_AIXC;
 250                 break;
 251         case SMB_ACL_TYPE_DEFAULT:
 252                 DEBUG(0, ("Got AIX JFS2 unsupported type: %d\n", type));
 253                 return NULL;
 254         default:
 255                 DEBUG(0, ("Got invalid type: %d\n", type));
 256                 smb_panic("exiting");
 257         }
 258
 259         return aixjfs2_get_posix_acl(fsp->fsp_name->base_name,
 260                                      aixjfs2_type, mem_ctx);
 261 }
 262
 263 /*
 264  * Test whether we have that aclType support on the given path
 265  */
 266 static int aixjfs2_query_acl_support(
 267         char *filepath,
 268         uint64_t aclType,
 269         acl_type_t *pacl_type_info
 270 )
 271 {
 272         acl_types_list_t acl_type_list;
 273         size_t acl_type_list_len = sizeof(acl_types_list_t);
 274         uint32_t i;
 275
 276         memset(&acl_type_list, 0, sizeof(acl_type_list));
 277
 278         if (aclx_gettypes(filepath, &acl_type_list, &acl_type_list_len)) {
 279                 DEBUG(2, ("aclx_gettypes failed with error %s for %s\n",
 280                         strerror(errno), filepath));
 281                 return -1;
 282         }
 283
 284         for(i=0; i<acl_type_list.num_entries; i++) {
 285                 if (acl_type_list.entries[i].u64==aclType) {
 286                         memcpy(pacl_type_info, acl_type_list.entries + i, sizeof(acl_type_t));
 287                         DEBUG(10, ("found %s ACL support for %s\n",
 288                                 pacl_type_info->acl_type, filepath));
 289                         return 0;
 290                 }
 291         }
 292
 293         return 1; /* haven't found that ACL type. */
 294 }
 295
 296 static bool aixjfs2_process_smbacl(vfs_handle_struct *handle,
 297                                    files_struct *fsp,
 298                                    struct SMB4ACL_T *smbacl)
 299 {
 300         struct SMB4ACE_T *smbace;
 301         TALLOC_CTX      *mem_ctx;
 302         nfs4_acl_int_t  *jfs2acl;
 303         int32_t         entryLen;
 304         uint32_t        aclLen, naces;
 305         int             rc;
 306         acl_type_t      acltype;
 307
 308         DEBUG(10, ("jfs2_process_smbacl invoked on %s\n", fsp_str_dbg(fsp)));
 309
 310         /* no need to be freed which is alloced with mem_ctx */
 311         mem_ctx = talloc_tos();
 312
 313         entryLen = sizeof(nfs4_ace_int_t);
 314         if (entryLen & 0x03)
 315                 entryLen = entryLen + 4 - (entryLen%4);
 316
 317         naces = smb_get_naces(smbacl);
 318         aclLen = ACL_V4_SIZ + naces * entryLen;
 319         jfs2acl = (nfs4_acl_int_t *)TALLOC_SIZE(mem_ctx, aclLen);
 320         if (jfs2acl==NULL) {
 321                 DEBUG(0, ("TALLOC_SIZE failed\n"));
 322                 errno = ENOMEM;
 323                 return False;
 324         }
 325
 326         jfs2acl->aclLength = ACL_V4_SIZ;
 327         jfs2acl->aclVersion = NFS4_ACL_INT_STRUCT_VERSION;
 328         jfs2acl->aclEntryN = 0;
 329
 330         for(smbace = smb_first_ace4(smbacl); smbace!=NULL; smbace = smb_next_ace4(smbace))
 331         {
 332                 SMB_ACE4PROP_T *aceprop = smb_get_ace4(smbace);
 333                 nfs4_ace_int_t *jfs2_ace = (nfs4_ace_int_t *)(((char *)jfs2acl) + jfs2acl->aclLength);
 334
 335                 memset(jfs2_ace, 0, entryLen);
 336                 jfs2_ace->entryLen = entryLen; /* won't store textual "who" */
 337                 jfs2_ace->aceType = aceprop->aceType; /* only ACCESS|DENY supported by jfs2 */
 338                 jfs2_ace->aceFlags = aceprop->aceFlags;
 339                 jfs2_ace->aceMask = aceprop->aceMask;
 340                 jfs2_ace->flags = (aceprop->flags&SMB_ACE4_ID_SPECIAL) ? ACE4_ID_SPECIAL : 0;
 341
 342                 /* don't care it's real content is only 16 or 32 bit */
 343                 jfs2_ace->aceWho.id = aceprop->who.id;
 344
 345                 /* iterate to the next jfs2 ace */
 346                 jfs2acl->aclLength += jfs2_ace->entryLen;
 347                 jfs2acl->aclEntryN++;
 348         }
 349         SMB_ASSERT(jfs2acl->aclEntryN==naces);
 350
 351         /* Don't query it (again) */
 352         memset(&acltype, 0, sizeof(acl_type_t));
 353         acltype.u64 = ACL_NFS4;
 354
 355         /* won't set S_ISUID - the only one JFS2/NFS4 accepts */
 356         rc = aclx_put(
 357                 fsp->fsp_name->base_name,
 358                 SET_ACL, /* set only the ACL, not mode bits */
 359                 acltype, /* not a pointer !!! */
 360                 jfs2acl,
 361                 jfs2acl->aclLength,
 362                 0 /* don't set here mode bits */
 363         );
 364         if (rc) {
 365                 DEBUG(8, ("aclx_put failed with %s\n", strerror(errno)));
 366                 return False;
 367         }
 368
 369         DEBUG(10, ("jfs2_process_smbacl succeeded.\n"));
 370         return True;
 371 }
 372
 373 static NTSTATUS aixjfs2_set_nt_acl_common(vfs_handle_struct *handle, files_struct *fsp, uint32_t security_info_sent, const struct security_descriptor *psd)
 374 {
 375         acl_type_t      acl_type_info;
 376         NTSTATUS        result = NT_STATUS_ACCESS_DENIED;
 377         int     rc;
 378
 379         rc = aixjfs2_query_acl_support(
 380                 fsp->fsp_name->base_name,
 381                 ACL_NFS4,
 382                 &acl_type_info);
 383
 384         if (rc==0)
 385         {
 386                 result = smb_set_nt_acl_nfs4(handle,
 387                         fsp, NULL, security_info_sent, psd,
 388                         aixjfs2_process_smbacl);
 389         } else if (rc==1) { /* assume POSIX ACL - by default... */
 390                 result = set_nt_acl(fsp, security_info_sent, psd);
 391         } else
 392                 result = map_nt_error_from_unix(errno); /* query failed */
 393
 394         return result;
 395 }
 396
 397 NTSTATUS aixjfs2_fset_nt_acl(vfs_handle_struct *handle, files_struct *fsp, uint32_t security_info_sent, const struct security_descriptor *psd)
 398 {
 399         return aixjfs2_set_nt_acl_common(handle, fsp, security_info_sent, psd);
 400 }
 401
 402 int aixjfs2_sys_acl_set_fd(vfs_handle_struct *handle,
 403                             files_struct *fsp,
 404                             SMB_ACL_TYPE_T type,
 405                             SMB_ACL_T theacl)
 406 {
 407         struct acl      *acl_aixc;
 408         acl_type_t      acl_type_info;
 409         int     rc;
 410
 411         DEBUG(10, ("aixjfs2_sys_acl_set_fd invoked for %s\n", fsp_str_dbg(fsp)));
 412
 413         rc = aixjfs2_query_acl_support(fsp->fsp_name->base_name, ACL_AIXC,
 414                                        &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         if (fsp->fsp_flags.is_pathref) {
 425                 /*
 426                  * This is no longer a handle based call.
 427                  */
 428                 return aclx_put(fsp->fsp_name->base_name,
 429                                 SET_ACL,
 430                                 acl_type_info,
 431                                 acl_aixc,
 432                                 acl_aixc->acl_len,
 433                                 0);
 434         }
 435
 436         rc = aclx_fput(
 437                 fsp_get_io_fd(fsp),
 438                 SET_ACL, /* set only the ACL, not mode bits */
 439                 acl_type_info,
 440                 acl_aixc,
 441                 acl_aixc->acl_len,
 442                 0
 443         );
 444         if (rc) {
 445                 DEBUG(2, ("aclx_fput failed with %s for %s\n",
 446                         strerror(errno), fsp_str_dbg(fsp)));
 447                 return -1;
 448         }
 449
 450         return 0;
 451 }
 452
 453 int aixjfs2_sys_acl_delete_def_fd(vfs_handle_struct *handle,
 454                                 files_struct *fsp)
 455 {
 456         /* Not available under AIXC ACL */
 457         /* Don't report here any error otherwise */
 458         /* upper layer will break the normal execution */
 459         return 0;
 460 }
 461
 462 static struct vfs_fn_pointers vfs_aixacl2_fns = {
 463         .stat_fn = nfs4_acl_stat,
 464         .fstat_fn = nfs4_acl_fstat,
 465         .lstat_fn = nfs4_acl_lstat,
 466         .fstatat_fn = nfs4_acl_fstatat,
 467         .fget_nt_acl_fn = aixjfs2_fget_nt_acl,
 468         .fset_nt_acl_fn = aixjfs2_fset_nt_acl,
 469         .sys_acl_get_fd_fn = aixjfs2_sys_acl_get_fd,
 470         .sys_acl_blob_get_fd_fn = aixjfs2_sys_acl_blob_get_fd,
 471         .sys_acl_set_fd_fn = aixjfs2_sys_acl_set_fd,
 472         .sys_acl_delete_def_fd_fn = aixjfs2_sys_acl_delete_def_fd
 473 };
 474
 475 static_decl_vfs;
 476 NTSTATUS vfs_aixacl2_init(TALLOC_CTX *ctx)
 477 {
 478         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, AIXACL2_MODULE_NAME,
 479                                 &vfs_aixacl2_fns);
 480 }