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 "nfs4_acls.h"
  22
  23 #undef DBGC_CLASS
  24 #define DBGC_CLASS DBGC_VFS
  25
  26 #define AIXACL2_MODULE_NAME "aixacl2"
  27
  28 extern SMB_ACL_T aixacl_to_smbacl( struct acl *file_acl);
  29 extern struct acl *aixacl_smb_to_aixacl(SMB_ACL_TYPE_T acltype, SMB_ACL_T theacl);
  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         struct security_descriptor **ppdesc)
 159 {
 160         SMB4ACL_T *pacl = NULL;
 161         bool    result;
 162         bool    retryPosix = False;
 163
 164         *ppdesc = NULL;
 165         result = aixjfs2_get_nfs4_acl(fsp->fsp_name->base_name, &pacl,
 166                                       &retryPosix);
 167         if (retryPosix)
 168         {
 169                 DEBUG(10, ("retrying with posix acl...\n"));
 170                 return posix_fget_nt_acl(fsp, security_info, ppdesc);
 171         }
 172         if (result==False)
 173                 return NT_STATUS_ACCESS_DENIED;
 174
 175         return smb_fget_nt_acl_nfs4(fsp, security_info, ppdesc, pacl);
 176 }
 177
 178 static NTSTATUS aixjfs2_get_nt_acl(vfs_handle_struct *handle,
 179         const char *name,
 180         uint32 security_info, struct security_descriptor **ppdesc)
 181 {
 182         SMB4ACL_T *pacl = NULL;
 183         bool    result;
 184         bool    retryPosix = False;
 185
 186         *ppdesc = NULL;
 187         result = aixjfs2_get_nfs4_acl(name, &pacl, &retryPosix);
 188         if (retryPosix)
 189         {
 190                 DEBUG(10, ("retrying with posix acl...\n"));
 191                 return posix_get_nt_acl(handle->conn, name, security_info,
 192                                         ppdesc);
 193         }
 194         if (result==False)
 195                 return NT_STATUS_ACCESS_DENIED;
 196
 197         return smb_get_nt_acl_nfs4(handle->conn, name, security_info, ppdesc,
 198                                    pacl);
 199 }
 200
 201 static SMB_ACL_T aixjfs2_get_posix_acl(const char *path, acl_type_t type)
 202 {
 203         aixc_acl_t *pacl;
 204         AIXJFS2_ACL_T *acl;
 205         SMB_ACL_T result = NULL;
 206         int ret;
 207
 208         acl = aixjfs2_getacl_alloc(path, &type);
 209
 210         if (acl == NULL) {
 211                 DEBUG(10, ("aixjfs2_getacl failed for %s with %s\n",
 212                            path, strerror(errno)));
 213                 if (errno == 0) {
 214                         errno = EINVAL;
 215                 }
 216                 goto done;
 217         }
 218
 219         pacl = &acl->aixc_acl[0];
 220         DEBUG(10, ("len: %d, mode: %d\n",
 221                    pacl->acl_len, pacl->acl_mode));
 222
 223         result = aixacl_to_smbacl(pacl);
 224         if (result == NULL) {
 225                 goto done;
 226         }
 227
 228  done:
 229         if (errno != 0) {
 230                 SAFE_FREE(result);
 231         }
 232         return result;
 233 }
 234
 235 SMB_ACL_T aixjfs2_sys_acl_get_file(vfs_handle_struct *handle,
 236                                     const char *path_p,
 237                                     SMB_ACL_TYPE_T type)
 238 {
 239         acl_type_t aixjfs2_type;
 240
 241         switch(type) {
 242         case SMB_ACL_TYPE_ACCESS:
 243                 aixjfs2_type.u64 = ACL_AIXC;
 244                 break;
 245         case SMB_ACL_TYPE_DEFAULT:
 246                 DEBUG(0, ("Got AIX JFS2 unsupported type: %d\n", type));
 247                 return NULL;
 248         default:
 249                 DEBUG(0, ("Got invalid type: %d\n", type));
 250                 smb_panic("exiting");
 251         }
 252
 253         return aixjfs2_get_posix_acl(path_p, aixjfs2_type);
 254 }
 255
 256 SMB_ACL_T aixjfs2_sys_acl_get_fd(vfs_handle_struct *handle,
 257                                   files_struct *fsp)
 258 {
 259         acl_type_t aixjfs2_type;
 260         aixjfs2_type.u64 = ACL_AIXC;
 261
 262         return aixjfs2_get_posix_acl(fsp->fsp_name->base_name, aixjfs2_type);
 263 }
 264
 265 /*
 266  * Test whether we have that aclType support on the given path
 267  */
 268 static int aixjfs2_query_acl_support(
 269         char *filepath,
 270         uint64_t aclType,
 271         acl_type_t *pacl_type_info
 272 )
 273 {
 274         acl_types_list_t        acl_type_list;
 275         size_t  acl_type_list_len = sizeof(acl_types_list_t);
 276         uint32_t        i;
 277
 278         memset(&acl_type_list, 0, sizeof(acl_type_list));
 279
 280         if (aclx_gettypes(filepath, &acl_type_list, &acl_type_list_len)) {
 281                 DEBUG(2, ("aclx_gettypes failed with error %s for %s\n",
 282                         strerror(errno), filepath));
 283                 return -1;
 284         }
 285
 286         for(i=0; i<acl_type_list.num_entries; i++) {
 287                 if (acl_type_list.entries[i].u64==aclType) {
 288                         memcpy(pacl_type_info, acl_type_list.entries + i, sizeof(acl_type_t));
 289                         DEBUG(10, ("found %s ACL support for %s\n",
 290                                 pacl_type_info->acl_type, filepath));
 291                         return 0;
 292                 }
 293         }
 294
 295         return 1; /* haven't found that ACL type. */
 296 }
 297
 298 static bool aixjfs2_process_smbacl(files_struct *fsp, SMB4ACL_T *smbacl)
 299 {
 300         SMB4ACE_T       *smbace;
 301         TALLOC_CTX      *mem_ctx;
 302         nfs4_acl_int_t  *jfs2acl;
 303         int32_t entryLen;
 304         uint32  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 ACCES|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(files_struct *fsp, uint32 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,
 381                 ACL_NFS4,
 382                 &acl_type_info);
 383
 384         if (rc==0)
 385         {
 386                 result = smb_set_nt_acl_nfs4(
 387                         fsp, 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 security_info_sent, const struct security_descriptor *psd)
 398 {
 399         return aixjfs2_set_nt_acl_common(fsp, security_info_sent, psd);
 400 }
 401
 402 int aixjfs2_sys_acl_set_file(vfs_handle_struct *handle,
 403                               const char *name,
 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_file invoked for %s", name));
 412
 413         rc = aixjfs2_query_acl_support((char *)name, ACL_AIXC, &acl_type_info);
 414         if (rc) {
 415                 DEBUG(8, ("jfs2_set_nt_acl: AIXC support not found\n"));
 416                 return -1;
 417         }
 418
 419         acl_aixc = aixacl_smb_to_aixacl(type, theacl);
 420         if (!acl_aixc)
 421                 return -1;
 422
 423         rc = aclx_put(
 424                 (char *)name,
 425                 SET_ACL, /* set only the ACL, not mode bits */
 426                 acl_type_info,
 427                 acl_aixc,
 428                 acl_aixc->acl_len,
 429                 0
 430         );
 431         if (rc) {
 432                 DEBUG(2, ("aclx_put failed with %s for %s\n",
 433                         strerror(errno), name));
 434                 return -1;
 435         }
 436
 437         return 0;
 438 }
 439
 440 int aixjfs2_sys_acl_set_fd(vfs_handle_struct *handle,
 441                             files_struct *fsp,
 442                             SMB_ACL_T theacl)
 443 {
 444         struct acl      *acl_aixc;
 445         acl_type_t      acl_type_info;
 446         int     rc;
 447
 448         DEBUG(10, ("aixjfs2_sys_acl_set_fd invoked for %s", fsp_str_dbg(fsp)));
 449
 450         rc = aixjfs2_query_acl_support(fsp->fsp_name->base_name, ACL_AIXC,
 451                                        &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_str_dbg(fsp)));
 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 static struct vfs_fn_pointers vfs_aixacl2_fns = {
 488         .fget_nt_acl = aixjfs2_fget_nt_acl,
 489         .get_nt_acl = aixjfs2_get_nt_acl,
 490         .fset_nt_acl = aixjfs2_fset_nt_acl,
 491         .sys_acl_get_file = aixjfs2_sys_acl_get_file,
 492         .sys_acl_get_fd = aixjfs2_sys_acl_get_fd,
 493         .sys_acl_set_file = aixjfs2_sys_acl_set_file,
 494         .sys_acl_set_fd = aixjfs2_sys_acl_set_fd,
 495         .sys_acl_delete_def_file = aixjfs2_sys_acl_delete_def_file
 496 };
 497
 498 NTSTATUS vfs_aixacl2_init(void);
 499 NTSTATUS vfs_aixacl2_init(void)
 500 {
 501         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, AIXACL2_MODULE_NAME,
 502                                 &vfs_aixacl2_fns);
 503 }