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
  25 #undef DBGC_CLASS
  26 #define DBGC_CLASS DBGC_VFS
  27
  28 #define AIXACL2_MODULE_NAME "aixacl2"
  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         struct security_descriptor **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->base_name, &pacl,
 168                                       &retryPosix);
 169         if (retryPosix)
 170         {
 171                 DEBUG(10, ("retrying with posix acl...\n"));
 172                 return posix_fget_nt_acl(fsp, security_info, ppdesc);
 173         }
 174         if (result==False)
 175                 return NT_STATUS_ACCESS_DENIED;
 176
 177         return smb_fget_nt_acl_nfs4(fsp, security_info, ppdesc, pacl);
 178 }
 179
 180 static NTSTATUS aixjfs2_get_nt_acl(vfs_handle_struct *handle,
 181         const char *name,
 182         uint32 security_info, struct security_descriptor **ppdesc)
 183 {
 184         SMB4ACL_T *pacl = NULL;
 185         bool    result;
 186         bool    retryPosix = False;
 187
 188         *ppdesc = NULL;
 189         result = aixjfs2_get_nfs4_acl(name, &pacl, &retryPosix);
 190         if (retryPosix)
 191         {
 192                 DEBUG(10, ("retrying with posix acl...\n"));
 193                 return posix_get_nt_acl(handle->conn, name, security_info,
 194                                         ppdesc);
 195         }
 196         if (result==False)
 197                 return NT_STATUS_ACCESS_DENIED;
 198
 199         return smb_get_nt_acl_nfs4(handle->conn, name, security_info, ppdesc,
 200                                    pacl);
 201 }
 202
 203 static SMB_ACL_T aixjfs2_get_posix_acl(const char *path, acl_type_t type)
 204 {
 205         aixc_acl_t *pacl;
 206         AIXJFS2_ACL_T *acl;
 207         SMB_ACL_T result = NULL;
 208         int ret;
 209
 210         acl = aixjfs2_getacl_alloc(path, &type);
 211
 212         if (acl == NULL) {
 213                 DEBUG(10, ("aixjfs2_getacl failed for %s with %s\n",
 214                            path, strerror(errno)));
 215                 if (errno == 0) {
 216                         errno = EINVAL;
 217                 }
 218                 goto done;
 219         }
 220
 221         pacl = &acl->aixc_acl[0];
 222         DEBUG(10, ("len: %d, mode: %d\n",
 223                    pacl->acl_len, pacl->acl_mode));
 224
 225         result = aixacl_to_smbacl(pacl);
 226         if (result == NULL) {
 227                 goto done;
 228         }
 229
 230  done:
 231         if (errno != 0) {
 232                 SAFE_FREE(result);
 233         }
 234         return result;
 235 }
 236
 237 SMB_ACL_T aixjfs2_sys_acl_get_file(vfs_handle_struct *handle,
 238                                     const char *path_p,
 239                                     SMB_ACL_TYPE_T type)
 240 {
 241         acl_type_t aixjfs2_type;
 242
 243         switch(type) {
 244         case SMB_ACL_TYPE_ACCESS:
 245                 aixjfs2_type.u64 = ACL_AIXC;
 246                 break;
 247         case SMB_ACL_TYPE_DEFAULT:
 248                 DEBUG(0, ("Got AIX JFS2 unsupported type: %d\n", type));
 249                 return NULL;
 250         default:
 251                 DEBUG(0, ("Got invalid type: %d\n", type));
 252                 smb_panic("exiting");
 253         }
 254
 255         return aixjfs2_get_posix_acl(path_p, aixjfs2_type);
 256 }
 257
 258 SMB_ACL_T aixjfs2_sys_acl_get_fd(vfs_handle_struct *handle,
 259                                   files_struct *fsp)
 260 {
 261         acl_type_t aixjfs2_type;
 262         aixjfs2_type.u64 = ACL_AIXC;
 263
 264         return aixjfs2_get_posix_acl(fsp->fsp_name->base_name, aixjfs2_type);
 265 }
 266
 267 /*
 268  * Test whether we have that aclType support on the given path
 269  */
 270 static int aixjfs2_query_acl_support(
 271         char *filepath,
 272         uint64_t aclType,
 273         acl_type_t *pacl_type_info
 274 )
 275 {
 276         acl_types_list_t        acl_type_list;
 277         size_t  acl_type_list_len = sizeof(acl_types_list_t);
 278         uint32_t        i;
 279
 280         memset(&acl_type_list, 0, sizeof(acl_type_list));
 281
 282         if (aclx_gettypes(filepath, &acl_type_list, &acl_type_list_len)) {
 283                 DEBUG(2, ("aclx_gettypes failed with error %s for %s\n",
 284                         strerror(errno), filepath));
 285                 return -1;
 286         }
 287
 288         for(i=0; i<acl_type_list.num_entries; i++) {
 289                 if (acl_type_list.entries[i].u64==aclType) {
 290                         memcpy(pacl_type_info, acl_type_list.entries + i, sizeof(acl_type_t));
 291                         DEBUG(10, ("found %s ACL support for %s\n",
 292                                 pacl_type_info->acl_type, filepath));
 293                         return 0;
 294                 }
 295         }
 296
 297         return 1; /* haven't found that ACL type. */
 298 }
 299
 300 static bool aixjfs2_process_smbacl(files_struct *fsp, SMB4ACL_T *smbacl)
 301 {
 302         SMB4ACE_T       *smbace;
 303         TALLOC_CTX      *mem_ctx;
 304         nfs4_acl_int_t  *jfs2acl;
 305         int32_t entryLen;
 306         uint32  aclLen, naces;
 307         int     rc;
 308         acl_type_t      acltype;
 309
 310         DEBUG(10, ("jfs2_process_smbacl invoked on %s\n", fsp_str_dbg(fsp)));
 311
 312         /* no need to be freed which is alloced with mem_ctx */
 313         mem_ctx = talloc_tos();
 314
 315         entryLen = sizeof(nfs4_ace_int_t);
 316         if (entryLen & 0x03)
 317                 entryLen = entryLen + 4 - (entryLen%4);
 318
 319         naces = smb_get_naces(smbacl);
 320         aclLen = ACL_V4_SIZ + naces * entryLen;
 321         jfs2acl = (nfs4_acl_int_t *)TALLOC_SIZE(mem_ctx, aclLen);
 322         if (jfs2acl==NULL) {
 323                 DEBUG(0, ("TALLOC_SIZE failed\n"));
 324                 errno = ENOMEM;
 325                 return False;
 326         }
 327
 328         jfs2acl->aclLength = ACL_V4_SIZ;
 329         jfs2acl->aclVersion = NFS4_ACL_INT_STRUCT_VERSION;
 330         jfs2acl->aclEntryN = 0;
 331
 332         for(smbace = smb_first_ace4(smbacl); smbace!=NULL; smbace = smb_next_ace4(smbace))
 333         {
 334                 SMB_ACE4PROP_T *aceprop = smb_get_ace4(smbace);
 335                 nfs4_ace_int_t *jfs2_ace = (nfs4_ace_int_t *)(((char *)jfs2acl) + jfs2acl->aclLength);
 336
 337                 memset(jfs2_ace, 0, entryLen);
 338                 jfs2_ace->entryLen = entryLen; /* won't store textual "who" */
 339                 jfs2_ace->aceType = aceprop->aceType; /* only ACCES|DENY supported by jfs2 */
 340                 jfs2_ace->aceFlags = aceprop->aceFlags;
 341                 jfs2_ace->aceMask = aceprop->aceMask;
 342                 jfs2_ace->flags = (aceprop->flags&SMB_ACE4_ID_SPECIAL) ? ACE4_ID_SPECIAL : 0;
 343
 344                 /* don't care it's real content is only 16 or 32 bit */
 345                 jfs2_ace->aceWho.id = aceprop->who.id;
 346
 347                 /* iterate to the next jfs2 ace */
 348                 jfs2acl->aclLength += jfs2_ace->entryLen;
 349                 jfs2acl->aclEntryN++;
 350         }
 351         SMB_ASSERT(jfs2acl->aclEntryN==naces);
 352
 353         /* Don't query it (again) */
 354         memset(&acltype, 0, sizeof(acl_type_t));
 355         acltype.u64 = ACL_NFS4;
 356
 357         /* won't set S_ISUID - the only one JFS2/NFS4 accepts */
 358         rc = aclx_put(
 359                 fsp->fsp_name->base_name,
 360                 SET_ACL, /* set only the ACL, not mode bits */
 361                 acltype, /* not a pointer !!! */
 362                 jfs2acl,
 363                 jfs2acl->aclLength,
 364                 0 /* don't set here mode bits */
 365         );
 366         if (rc) {
 367                 DEBUG(8, ("aclx_put failed with %s\n", strerror(errno)));
 368                 return False;
 369         }
 370
 371         DEBUG(10, ("jfs2_process_smbacl succeeded.\n"));
 372         return True;
 373 }
 374
 375 static NTSTATUS aixjfs2_set_nt_acl_common(files_struct *fsp, uint32 security_info_sent, const struct security_descriptor *psd)
 376 {
 377         acl_type_t      acl_type_info;
 378         NTSTATUS        result = NT_STATUS_ACCESS_DENIED;
 379         int     rc;
 380
 381         rc = aixjfs2_query_acl_support(
 382                 fsp->fsp_name,
 383                 ACL_NFS4,
 384                 &acl_type_info);
 385
 386         if (rc==0)
 387         {
 388                 result = smb_set_nt_acl_nfs4(
 389                         fsp, security_info_sent, psd,
 390                         aixjfs2_process_smbacl);
 391         } else if (rc==1) { /* assume POSIX ACL - by default... */
 392                 result = set_nt_acl(fsp, security_info_sent, psd);
 393         } else
 394                 result = map_nt_error_from_unix(errno); /* query failed */
 395
 396         return result;
 397 }
 398
 399 NTSTATUS aixjfs2_fset_nt_acl(vfs_handle_struct *handle, files_struct *fsp, uint32 security_info_sent, const struct security_descriptor *psd)
 400 {
 401         return aixjfs2_set_nt_acl_common(fsp, security_info_sent, psd);
 402 }
 403
 404 int aixjfs2_sys_acl_set_file(vfs_handle_struct *handle,
 405                               const char *name,
 406                               SMB_ACL_TYPE_T type,
 407                               SMB_ACL_T theacl)
 408 {
 409         struct acl      *acl_aixc;
 410         acl_type_t      acl_type_info;
 411         int     rc;
 412
 413         DEBUG(10, ("aixjfs2_sys_acl_set_file invoked for %s", name));
 414
 415         rc = aixjfs2_query_acl_support((char *)name, ACL_AIXC, &acl_type_info);
 416         if (rc) {
 417                 DEBUG(8, ("jfs2_set_nt_acl: AIXC support not found\n"));
 418                 return -1;
 419         }
 420
 421         acl_aixc = aixacl_smb_to_aixacl(type, theacl);
 422         if (!acl_aixc)
 423                 return -1;
 424
 425         rc = aclx_put(
 426                 (char *)name,
 427                 SET_ACL, /* set only the ACL, not mode bits */
 428                 acl_type_info,
 429                 acl_aixc,
 430                 acl_aixc->acl_len,
 431                 0
 432         );
 433         if (rc) {
 434                 DEBUG(2, ("aclx_put failed with %s for %s\n",
 435                         strerror(errno), name));
 436                 return -1;
 437         }
 438
 439         return 0;
 440 }
 441
 442 int aixjfs2_sys_acl_set_fd(vfs_handle_struct *handle,
 443                             files_struct *fsp,
 444                             SMB_ACL_T theacl)
 445 {
 446         struct acl      *acl_aixc;
 447         acl_type_t      acl_type_info;
 448         int     rc;
 449
 450         DEBUG(10, ("aixjfs2_sys_acl_set_fd invoked for %s", fsp_str_dbg(fsp)));
 451
 452         rc = aixjfs2_query_acl_support(fsp->fsp_name->base_name, ACL_AIXC,
 453                                        &acl_type_info);
 454         if (rc) {
 455                 DEBUG(8, ("jfs2_set_nt_acl: AIXC support not found\n"));
 456                 return -1;
 457         }
 458
 459         acl_aixc = aixacl_smb_to_aixacl(SMB_ACL_TYPE_ACCESS, theacl);
 460         if (!acl_aixc)
 461                 return -1;
 462
 463         rc = aclx_fput(
 464                 fsp->fh->fd,
 465                 SET_ACL, /* set only the ACL, not mode bits */
 466                 acl_type_info,
 467                 acl_aixc,
 468                 acl_aixc->acl_len,
 469                 0
 470         );
 471         if (rc) {
 472                 DEBUG(2, ("aclx_fput failed with %s for %s\n",
 473                         strerror(errno), fsp_str_dbg(fsp)));
 474                 return -1;
 475         }
 476
 477         return 0;
 478 }
 479
 480 int aixjfs2_sys_acl_delete_def_file(vfs_handle_struct *handle,
 481                                      const char *path)
 482 {
 483         /* Not available under AIXC ACL */
 484         /* Don't report here any error otherwise */
 485         /* upper layer will break the normal execution */
 486         return 0;
 487 }
 488
 489 static struct vfs_fn_pointers vfs_aixacl2_fns = {
 490         .fget_nt_acl = aixjfs2_fget_nt_acl,
 491         .get_nt_acl = aixjfs2_get_nt_acl,
 492         .fset_nt_acl = aixjfs2_fset_nt_acl,
 493         .sys_acl_get_file = aixjfs2_sys_acl_get_file,
 494         .sys_acl_get_fd = aixjfs2_sys_acl_get_fd,
 495         .sys_acl_set_file = aixjfs2_sys_acl_set_file,
 496         .sys_acl_set_fd = aixjfs2_sys_acl_set_fd,
 497         .sys_acl_delete_def_file = aixjfs2_sys_acl_delete_def_file
 498 };
 499
 500 NTSTATUS vfs_aixacl2_init(void);
 501 NTSTATUS vfs_aixacl2_init(void)
 502 {
 503         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, AIXACL2_MODULE_NAME,
 504                                 &vfs_aixacl2_fns);
 505 }