source3/modules/vfs_gpfs.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Wrap gpfs calls in vfs functions.
   4
   5    Copyright (C) Christian Ambach <cambach1@de.ibm.com> 2006
   6
   7    Major code contributions by Chetan Shringarpure <chetan.sh@in.ibm.com>
   8                             and Gomati Mohanan <gomati.mohanan@in.ibm.com>
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22 */
  23
  24 #include "includes.h"
  25
  26 #undef DBGC_CLASS
  27 #define DBGC_CLASS DBGC_VFS
  28
  29 #include <gpfs_gpl.h>
  30 #include "nfs4_acls.h"
  31 #include "vfs_gpfs.h"
  32
  33 static int vfs_gpfs_kernel_flock(vfs_handle_struct *handle, files_struct *fsp,
  34                                  uint32 share_mode)
  35 {
  36
  37         START_PROFILE(syscall_kernel_flock);
  38
  39         kernel_flock(fsp->fh->fd, share_mode);
  40
  41         if (!set_gpfs_sharemode(fsp, fsp->access_mask, fsp->share_access)) {
  42
  43                 return -1;
  44
  45         }
  46
  47         END_PROFILE(syscall_kernel_flock);
  48
  49         return 0;
  50 }
  51
  52 static int vfs_gpfs_setlease(vfs_handle_struct *handle, files_struct *fsp,
  53                              int leasetype)
  54 {
  55         int ret;
  56
  57         START_PROFILE(syscall_linux_setlease);
  58
  59         if ( linux_set_lease_sighandler(fsp->fh->fd) == -1)
  60                 return -1;
  61
  62         ret = set_gpfs_lease(fsp->fh->fd,leasetype);
  63
  64         if ( ret < 0 ) {
  65                 /* This must have come from GPFS not being available */
  66                 /* or some other error, hence call the default */
  67                 ret = linux_setlease(fsp->fh->fd, leasetype);
  68         }
  69
  70         END_PROFILE(syscall_linux_setlease);
  71
  72         return ret;
  73 }
  74
  75 static int vfs_gpfs_get_real_filename(struct vfs_handle_struct *handle,
  76                                       const char *path,
  77                                       const char *name,
  78                                       TALLOC_CTX *mem_ctx,
  79                                       char **found_name)
  80 {
  81         int result;
  82         char *full_path;
  83         char real_pathname[PATH_MAX+1];
  84         int buflen;
  85
  86         full_path = talloc_asprintf(talloc_tos(), "%s/%s", path, name);
  87         if (full_path == NULL) {
  88                 errno = ENOMEM;
  89                 return -1;
  90         }
  91
  92         buflen = sizeof(real_pathname) - 1;
  93
  94         result = smbd_gpfs_get_realfilename_path(full_path, real_pathname,
  95                                                  &buflen);
  96
  97         TALLOC_FREE(full_path);
  98
  99         if (result == -1) {
 100                 DEBUG(10, ("smbd_gpfs_get_realfilename_path returned %s\n",
 101                            strerror(errno)));
 102                 return -1;
 103         }
 104
 105         /*
 106          * GPFS does not necessarily null-terminate the returned path
 107          * but instead returns the buffer length in buflen.
 108          */
 109
 110         if (buflen < sizeof(real_pathname)) {
 111                 real_pathname[buflen] = '\0';
 112         } else {
 113                 real_pathname[sizeof(real_pathname)-1] = '\0';
 114         }
 115
 116         DEBUG(10, ("smbd_gpfs_get_realfilename_path: %s/%s -> %s\n",
 117                    path, name, real_pathname));
 118
 119         name = strrchr_m(real_pathname, '/');
 120         if (name == NULL) {
 121                 errno = ENOENT;
 122                 return -1;
 123         }
 124
 125         *found_name = talloc_strdup(mem_ctx, name+1);
 126         if (*found_name == NULL) {
 127                 errno = ENOMEM;
 128                 return -1;
 129         }
 130
 131         return 0;
 132 }
 133
 134 static void gpfs_dumpacl(int level, struct gpfs_acl *gacl)
 135 {
 136         int     i;
 137         if (gacl==NULL)
 138         {
 139                 DEBUG(0, ("gpfs acl is NULL\n"));
 140                 return;
 141         }
 142
 143         DEBUG(level, ("gpfs acl: nace: %d, type:%d, version:%d, level:%d, len:%d\n",
 144                 gacl->acl_nace, gacl->acl_type, gacl->acl_version, gacl->acl_level, gacl->acl_len));
 145         for(i=0; i<gacl->acl_nace; i++)
 146         {
 147                 struct gpfs_ace_v4 *gace = gacl->ace_v4 + i;
 148                 DEBUG(level, ("\tace[%d]: type:%d, flags:0x%x, mask:0x%x, iflags:0x%x, who:%u\n",
 149                         i, gace->aceType, gace->aceFlags, gace->aceMask,
 150                         gace->aceIFlags, gace->aceWho));
 151         }
 152 }
 153
 154 static struct gpfs_acl *gpfs_getacl_alloc(const char *fname, gpfs_aclType_t type)
 155 {
 156         struct gpfs_acl *acl;
 157         size_t len = 200;
 158         int ret;
 159         TALLOC_CTX *mem_ctx = talloc_tos();
 160
 161         acl = (struct gpfs_acl *)TALLOC_SIZE(mem_ctx, len);
 162         if (acl == NULL) {
 163                 errno = ENOMEM;
 164                 return NULL;
 165         }
 166
 167         acl->acl_len = len;
 168         acl->acl_level = 0;
 169         acl->acl_version = 0;
 170         acl->acl_type = type;
 171
 172         ret = smbd_gpfs_getacl((char *)fname, GPFS_GETACL_STRUCT | GPFS_ACL_SAMBA, acl);
 173         if ((ret != 0) && (errno == ENOSPC)) {
 174                 struct gpfs_acl *new_acl = (struct gpfs_acl *)TALLOC_SIZE(
 175                         mem_ctx, acl->acl_len + sizeof(struct gpfs_acl));
 176                 if (new_acl == NULL) {
 177                         errno = ENOMEM;
 178                         return NULL;
 179                 }
 180
 181                 new_acl->acl_len = acl->acl_len;
 182                 new_acl->acl_level = acl->acl_level;
 183                 new_acl->acl_version = acl->acl_version;
 184                 new_acl->acl_type = acl->acl_type;
 185                 acl = new_acl;
 186
 187                 ret = smbd_gpfs_getacl((char *)fname, GPFS_GETACL_STRUCT | GPFS_ACL_SAMBA, acl);
 188         }
 189         if (ret != 0)
 190         {
 191                 DEBUG(8, ("smbd_gpfs_getacl failed with %s\n",strerror(errno)));
 192                 return NULL;
 193         }
 194
 195         return acl;
 196 }
 197
 198 /* Tries to get nfs4 acls and returns SMB ACL allocated.
 199  * On failure returns 1 if it got non-NFSv4 ACL to prompt
 200  * retry with POSIX ACL checks.
 201  * On failure returns -1 if there is system (GPFS) error, check errno.
 202  * Returns 0 on success
 203  */
 204 static int gpfs_get_nfs4_acl(const char *fname, SMB4ACL_T **ppacl)
 205 {
 206         int i;
 207         struct gpfs_acl *gacl = NULL;
 208         DEBUG(10, ("gpfs_get_nfs4_acl invoked for %s\n", fname));
 209
 210         /* First get the real acl length */
 211         gacl = gpfs_getacl_alloc(fname, 0);
 212         if (gacl == NULL) {
 213                 DEBUG(9, ("gpfs_getacl failed for %s with %s\n",
 214                            fname, strerror(errno)));
 215                 return -1;
 216         }
 217
 218         if (gacl->acl_type != GPFS_ACL_TYPE_NFS4) {
 219                 DEBUG(10, ("Got non-nfsv4 acl\n"));
 220                 /* Retry with POSIX ACLs check */
 221                 return 1;
 222         }
 223
 224         *ppacl = smb_create_smb4acl();
 225
 226         DEBUG(10, ("len: %d, level: %d, version: %d, nace: %d\n",
 227                    gacl->acl_len, gacl->acl_level, gacl->acl_version,
 228                    gacl->acl_nace));
 229
 230         for (i=0; i<gacl->acl_nace; i++) {
 231                 struct gpfs_ace_v4 *gace = &gacl->ace_v4[i];
 232                 SMB_ACE4PROP_T smbace;
 233                 DEBUG(10, ("type: %d, iflags: %x, flags: %x, mask: %x, "
 234                            "who: %d\n", gace->aceType, gace->aceIFlags,
 235                            gace->aceFlags, gace->aceMask, gace->aceWho));
 236
 237                 ZERO_STRUCT(smbace);
 238                 if (gace->aceIFlags & ACE4_IFLAG_SPECIAL_ID) {
 239                         smbace.flags |= SMB_ACE4_ID_SPECIAL;
 240                         switch (gace->aceWho) {
 241                         case ACE4_SPECIAL_OWNER:
 242                                 smbace.who.special_id = SMB_ACE4_WHO_OWNER;
 243                                 break;
 244                         case ACE4_SPECIAL_GROUP:
 245                                 smbace.who.special_id = SMB_ACE4_WHO_GROUP;
 246                                 break;
 247                         case ACE4_SPECIAL_EVERYONE:
 248                                 smbace.who.special_id = SMB_ACE4_WHO_EVERYONE;
 249                                 break;
 250                         default:
 251                                 DEBUG(8, ("invalid special gpfs id %d "
 252                                           "ignored\n", gace->aceWho));
 253                                 continue; /* don't add it */
 254                         }
 255                 } else {
 256                         if (gace->aceFlags & ACE4_FLAG_GROUP_ID)
 257                                 smbace.who.gid = gace->aceWho;
 258                         else
 259                                 smbace.who.uid = gace->aceWho;
 260                 }
 261
 262                 /* remove redundent deny entries */
 263                 if (i > 0 && gace->aceType == SMB_ACE4_ACCESS_DENIED_ACE_TYPE) {
 264                         struct gpfs_ace_v4 *prev = &gacl->ace_v4[i-1];
 265                         if (prev->aceType == SMB_ACE4_ACCESS_ALLOWED_ACE_TYPE &&
 266                             prev->aceFlags == gace->aceFlags &&
 267                             prev->aceIFlags == gace->aceIFlags &&
 268                             (gace->aceMask & prev->aceMask) == 0 &&
 269                             gace->aceWho == prev->aceWho) {
 270                                 /* its redundent - skip it */
 271                                 continue;
 272                         }
 273                 }
 274
 275                 smbace.aceType = gace->aceType;
 276                 smbace.aceFlags = gace->aceFlags;
 277                 smbace.aceMask = gace->aceMask;
 278                 smb_add_ace4(*ppacl, &smbace);
 279         }
 280
 281         return 0;
 282 }
 283
 284 static NTSTATUS gpfsacl_fget_nt_acl(vfs_handle_struct *handle,
 285         files_struct *fsp, uint32 security_info,
 286         SEC_DESC **ppdesc)
 287 {
 288         SMB4ACL_T *pacl = NULL;
 289         int     result;
 290
 291         *ppdesc = NULL;
 292         result = gpfs_get_nfs4_acl(fsp->fsp_name, &pacl);
 293
 294         if (result == 0)
 295                 return smb_fget_nt_acl_nfs4(fsp, security_info, ppdesc, pacl);
 296
 297         if (result > 0) {
 298                 DEBUG(10, ("retrying with posix acl...\n"));
 299                 return posix_fget_nt_acl(fsp, security_info, ppdesc);
 300         }
 301
 302         /* GPFS ACL was not read, something wrong happened, error code is set in errno */
 303         return map_nt_error_from_unix(errno);
 304 }
 305
 306 static NTSTATUS gpfsacl_get_nt_acl(vfs_handle_struct *handle,
 307         const char *name,
 308         uint32 security_info, SEC_DESC **ppdesc)
 309 {
 310         SMB4ACL_T *pacl = NULL;
 311         int     result;
 312
 313         *ppdesc = NULL;
 314         result = gpfs_get_nfs4_acl(name, &pacl);
 315
 316         if (result == 0)
 317                 return smb_get_nt_acl_nfs4(handle->conn, name, security_info, ppdesc, pacl);
 318
 319         if (result > 0) {
 320                 DEBUG(10, ("retrying with posix acl...\n"));
 321                 return posix_get_nt_acl(handle->conn, name, security_info, ppdesc);
 322         }
 323
 324         /* GPFS ACL was not read, something wrong happened, error code is set in errno */
 325         return map_nt_error_from_unix(errno);
 326 }
 327
 328 static bool gpfsacl_process_smbacl(files_struct *fsp, SMB4ACL_T *smbacl)
 329 {
 330         int ret;
 331         gpfs_aclLen_t gacl_len;
 332         SMB4ACE_T       *smbace;
 333         struct gpfs_acl *gacl;
 334         TALLOC_CTX *mem_ctx  = talloc_tos();
 335
 336         gacl_len = sizeof(struct gpfs_acl) +
 337                 (smb_get_naces(smbacl)-1)*sizeof(gpfs_ace_v4_t);
 338
 339         gacl = TALLOC_SIZE(mem_ctx, gacl_len);
 340         if (gacl == NULL) {
 341                 DEBUG(0, ("talloc failed\n"));
 342                 errno = ENOMEM;
 343                 return False;
 344         }
 345
 346         gacl->acl_len = gacl_len;
 347         gacl->acl_level = 0;
 348         gacl->acl_version = GPFS_ACL_VERSION_NFS4;
 349         gacl->acl_type = GPFS_ACL_TYPE_NFS4;
 350         gacl->acl_nace = 0; /* change later... */
 351
 352         for (smbace=smb_first_ace4(smbacl); smbace!=NULL; smbace = smb_next_ace4(smbace)) {
 353                 struct gpfs_ace_v4 *gace = &gacl->ace_v4[gacl->acl_nace];
 354                 SMB_ACE4PROP_T  *aceprop = smb_get_ace4(smbace);
 355
 356                 gace->aceType = aceprop->aceType;
 357                 gace->aceFlags = aceprop->aceFlags;
 358                 gace->aceMask = aceprop->aceMask;
 359
 360                 /*
 361                  * GPFS can't distinguish between WRITE and APPEND on
 362                  * files, so one being set without the other is an
 363                  * error. Sorry for the many ()'s :-)
 364                  */
 365
 366                 if (!fsp->is_directory
 367                     &&
 368                     ((((gace->aceMask & ACE4_MASK_WRITE) == 0)
 369                       && ((gace->aceMask & ACE4_MASK_APPEND) != 0))
 370                      ||
 371                      (((gace->aceMask & ACE4_MASK_WRITE) != 0)
 372                       && ((gace->aceMask & ACE4_MASK_APPEND) == 0)))
 373                     &&
 374                     lp_parm_bool(fsp->conn->params->service, "gpfs",
 375                                  "merge_writeappend", True)) {
 376                         DEBUG(2, ("vfs_gpfs.c: file [%s]: ACE contains "
 377                                   "WRITE^APPEND, setting WRITE|APPEND\n",
 378                                   fsp->fsp_name));
 379                         gace->aceMask |= ACE4_MASK_WRITE|ACE4_MASK_APPEND;
 380                 }
 381
 382                 gace->aceIFlags = (aceprop->flags&SMB_ACE4_ID_SPECIAL) ? ACE4_IFLAG_SPECIAL_ID : 0;
 383
 384                 if (aceprop->flags&SMB_ACE4_ID_SPECIAL)
 385                 {
 386                         switch(aceprop->who.special_id)
 387                         {
 388                         case SMB_ACE4_WHO_EVERYONE:
 389                                 gace->aceWho = ACE4_SPECIAL_EVERYONE;
 390                                 break;
 391                         case SMB_ACE4_WHO_OWNER:
 392                                 gace->aceWho = ACE4_SPECIAL_OWNER;
 393                                 break;
 394                         case SMB_ACE4_WHO_GROUP:
 395                                 gace->aceWho = ACE4_SPECIAL_GROUP;
 396                                 break;
 397                         default:
 398                                 DEBUG(8, ("unsupported special_id %d\n", aceprop->who.special_id));
 399                                 continue; /* don't add it !!! */
 400                         }
 401                 } else {
 402                         /* just only for the type safety... */
 403                         if (aceprop->aceFlags&SMB_ACE4_IDENTIFIER_GROUP)
 404                                 gace->aceWho = aceprop->who.gid;
 405                         else
 406                                 gace->aceWho = aceprop->who.uid;
 407                 }
 408
 409                 gacl->acl_nace++;
 410         }
 411
 412         ret = smbd_gpfs_putacl(fsp->fsp_name, GPFS_PUTACL_STRUCT | GPFS_ACL_SAMBA, gacl);
 413         if (ret != 0) {
 414                 DEBUG(8, ("gpfs_putacl failed with %s\n", strerror(errno)));
 415                 gpfs_dumpacl(8, gacl);
 416                 return False;
 417         }
 418
 419         DEBUG(10, ("gpfs_putacl succeeded\n"));
 420         return True;
 421 }
 422
 423 static NTSTATUS gpfsacl_set_nt_acl_internal(files_struct *fsp, uint32 security_info_sent, const SEC_DESC *psd)
 424 {
 425         struct gpfs_acl *acl;
 426         NTSTATUS result = NT_STATUS_ACCESS_DENIED;
 427
 428         acl = gpfs_getacl_alloc(fsp->fsp_name, 0);
 429         if (acl == NULL)
 430                 return result;
 431
 432         if (acl->acl_version&GPFS_ACL_VERSION_NFS4)
 433         {
 434                 result = smb_set_nt_acl_nfs4(
 435                         fsp, security_info_sent, psd,
 436                         gpfsacl_process_smbacl);
 437         } else { /* assume POSIX ACL - by default... */
 438                 result = set_nt_acl(fsp, security_info_sent, psd);
 439         }
 440
 441         return result;
 442 }
 443
 444 static NTSTATUS gpfsacl_fset_nt_acl(vfs_handle_struct *handle, files_struct *fsp, uint32 security_info_sent, const SEC_DESC *psd)
 445 {
 446         return gpfsacl_set_nt_acl_internal(fsp, security_info_sent, psd);
 447 }
 448
 449 static SMB_ACL_T gpfs2smb_acl(const struct gpfs_acl *pacl)
 450 {
 451         SMB_ACL_T result;
 452         int i;
 453
 454         result = sys_acl_init(pacl->acl_nace);
 455         if (result == NULL) {
 456                 errno = ENOMEM;
 457                 return NULL;
 458         }
 459
 460         result->count = pacl->acl_nace;
 461
 462         for (i=0; i<pacl->acl_nace; i++) {
 463                 struct smb_acl_entry *ace = &result->acl[i];
 464                 const struct gpfs_ace_v1 *g_ace = &pacl->ace_v1[i];
 465
 466                 DEBUG(10, ("Converting type %d id %lu perm %x\n",
 467                            (int)g_ace->ace_type, (unsigned long)g_ace->ace_who,
 468                            (int)g_ace->ace_perm));
 469
 470                 switch (g_ace->ace_type) {
 471                 case GPFS_ACL_USER:
 472                         ace->a_type = SMB_ACL_USER;
 473                         ace->uid = (uid_t)g_ace->ace_who;
 474                         break;
 475                 case GPFS_ACL_USER_OBJ:
 476                         ace->a_type = SMB_ACL_USER_OBJ;
 477                         break;
 478                 case GPFS_ACL_GROUP:
 479                         ace->a_type = SMB_ACL_GROUP;
 480                         ace->gid = (gid_t)g_ace->ace_who;
 481                         break;
 482                 case GPFS_ACL_GROUP_OBJ:
 483                         ace->a_type = SMB_ACL_GROUP_OBJ;
 484                         break;
 485                 case GPFS_ACL_OTHER:
 486                         ace->a_type = SMB_ACL_OTHER;
 487                         break;
 488                 case GPFS_ACL_MASK:
 489                         ace->a_type = SMB_ACL_MASK;
 490                         break;
 491                 default:
 492                         DEBUG(10, ("Got invalid ace_type: %d\n",
 493                                    g_ace->ace_type));
 494                         errno = EINVAL;
 495                         SAFE_FREE(result);
 496                         return NULL;
 497                 }
 498
 499                 ace->a_perm = 0;
 500                 ace->a_perm |= (g_ace->ace_perm & ACL_PERM_READ) ?
 501                         SMB_ACL_READ : 0;
 502                 ace->a_perm |= (g_ace->ace_perm & ACL_PERM_WRITE) ?
 503                         SMB_ACL_WRITE : 0;
 504                 ace->a_perm |= (g_ace->ace_perm & ACL_PERM_EXECUTE) ?
 505                         SMB_ACL_EXECUTE : 0;
 506
 507                 DEBUGADD(10, ("Converted to %d perm %x\n",
 508                               ace->a_type, ace->a_perm));
 509         }
 510
 511         return result;
 512 }
 513
 514 static SMB_ACL_T gpfsacl_get_posix_acl(const char *path, gpfs_aclType_t type)
 515 {
 516         struct gpfs_acl *pacl;
 517         SMB_ACL_T result = NULL;
 518
 519         pacl = gpfs_getacl_alloc(path, type);
 520
 521         if (pacl == NULL) {
 522                 DEBUG(10, ("gpfs_getacl failed for %s with %s\n",
 523                            path, strerror(errno)));
 524                 if (errno == 0) {
 525                         errno = EINVAL;
 526                 }
 527                 goto done;
 528         }
 529
 530         if (pacl->acl_version != GPFS_ACL_VERSION_POSIX) {
 531                 DEBUG(10, ("Got acl version %d, expected %d\n",
 532                            pacl->acl_version, GPFS_ACL_VERSION_POSIX));
 533                 errno = EINVAL;
 534                 goto done;
 535         }
 536
 537         DEBUG(10, ("len: %d, level: %d, version: %d, nace: %d\n",
 538                    pacl->acl_len, pacl->acl_level, pacl->acl_version,
 539                    pacl->acl_nace));
 540
 541         result = gpfs2smb_acl(pacl);
 542         if (result == NULL) {
 543                 goto done;
 544         }
 545
 546  done:
 547
 548         if (errno != 0) {
 549                 SAFE_FREE(result);
 550         }
 551         return result;
 552 }
 553
 554 SMB_ACL_T gpfsacl_sys_acl_get_file(vfs_handle_struct *handle,
 555                                     const char *path_p,
 556                                     SMB_ACL_TYPE_T type)
 557 {
 558         gpfs_aclType_t gpfs_type;
 559
 560         switch(type) {
 561         case SMB_ACL_TYPE_ACCESS:
 562                 gpfs_type = GPFS_ACL_TYPE_ACCESS;
 563                 break;
 564         case SMB_ACL_TYPE_DEFAULT:
 565                 gpfs_type = GPFS_ACL_TYPE_DEFAULT;
 566                 break;
 567         default:
 568                 DEBUG(0, ("Got invalid type: %d\n", type));
 569                 smb_panic("exiting");
 570         }
 571
 572         return gpfsacl_get_posix_acl(path_p, gpfs_type);
 573 }
 574
 575 SMB_ACL_T gpfsacl_sys_acl_get_fd(vfs_handle_struct *handle,
 576                                  files_struct *fsp)
 577 {
 578         return gpfsacl_get_posix_acl(fsp->fsp_name, GPFS_ACL_TYPE_ACCESS);
 579 }
 580
 581 static struct gpfs_acl *smb2gpfs_acl(const SMB_ACL_T pacl,
 582                                      SMB_ACL_TYPE_T type)
 583 {
 584         gpfs_aclLen_t len;
 585         struct gpfs_acl *result;
 586         int i;
 587         union gpfs_ace_union
 588         {
 589                 gpfs_ace_v1_t  ace_v1[1]; /* when GPFS_ACL_VERSION_POSIX */
 590                 gpfs_ace_v4_t  ace_v4[1]; /* when GPFS_ACL_VERSION_NFS4  */
 591         };
 592
 593         DEBUG(10, ("smb2gpfs_acl: Got ACL with %d entries\n", pacl->count));
 594
 595         len = sizeof(struct gpfs_acl) - sizeof(union gpfs_ace_union) +
 596                 (pacl->count)*sizeof(gpfs_ace_v1_t);
 597
 598         result = SMB_MALLOC(len);
 599         if (result == NULL) {
 600                 errno = ENOMEM;
 601                 return result;
 602         }
 603
 604         result->acl_len = len;
 605         result->acl_level = 0;
 606         result->acl_version = GPFS_ACL_VERSION_POSIX;
 607         result->acl_type = (type == SMB_ACL_TYPE_DEFAULT) ?
 608                 GPFS_ACL_TYPE_DEFAULT : GPFS_ACL_TYPE_ACCESS;
 609         result->acl_nace = pacl->count;
 610
 611         for (i=0; i<pacl->count; i++) {
 612                 const struct smb_acl_entry *ace = &pacl->acl[i];
 613                 struct gpfs_ace_v1 *g_ace = &result->ace_v1[i];
 614
 615                 DEBUG(10, ("Converting type %d perm %x\n",
 616                            (int)ace->a_type, (int)ace->a_perm));
 617
 618                 g_ace->ace_perm = 0;
 619
 620                 switch(ace->a_type) {
 621                 case SMB_ACL_USER:
 622                         g_ace->ace_type = GPFS_ACL_USER;
 623                         g_ace->ace_who = (gpfs_uid_t)ace->uid;
 624                         break;
 625                 case SMB_ACL_USER_OBJ:
 626                         g_ace->ace_type = GPFS_ACL_USER_OBJ;
 627                         g_ace->ace_perm |= ACL_PERM_CONTROL;
 628                         g_ace->ace_who = 0;
 629                         break;
 630                 case SMB_ACL_GROUP:
 631                         g_ace->ace_type = GPFS_ACL_GROUP;
 632                         g_ace->ace_who = (gpfs_uid_t)ace->gid;
 633                         break;
 634                 case SMB_ACL_GROUP_OBJ:
 635                         g_ace->ace_type = GPFS_ACL_GROUP_OBJ;
 636                         g_ace->ace_who = 0;
 637                         break;
 638                 case SMB_ACL_MASK:
 639                         g_ace->ace_type = GPFS_ACL_MASK;
 640                         g_ace->ace_perm = 0x8f;
 641                         g_ace->ace_who = 0;
 642                         break;
 643                 case SMB_ACL_OTHER:
 644                         g_ace->ace_type = GPFS_ACL_OTHER;
 645                         g_ace->ace_who = 0;
 646                         break;
 647                 default:
 648                         DEBUG(10, ("Got invalid ace_type: %d\n", ace->a_type));
 649                         errno = EINVAL;
 650                         SAFE_FREE(result);
 651                         return NULL;
 652                 }
 653
 654                 g_ace->ace_perm |= (ace->a_perm & SMB_ACL_READ) ?
 655                         ACL_PERM_READ : 0;
 656                 g_ace->ace_perm |= (ace->a_perm & SMB_ACL_WRITE) ?
 657                         ACL_PERM_WRITE : 0;
 658                 g_ace->ace_perm |= (ace->a_perm & SMB_ACL_EXECUTE) ?
 659                         ACL_PERM_EXECUTE : 0;
 660
 661                 DEBUGADD(10, ("Converted to %d id %d perm %x\n",
 662                               g_ace->ace_type, g_ace->ace_who, g_ace->ace_perm));
 663         }
 664
 665         return result;
 666 }
 667
 668 int gpfsacl_sys_acl_set_file(vfs_handle_struct *handle,
 669                               const char *name,
 670                               SMB_ACL_TYPE_T type,
 671                               SMB_ACL_T theacl)
 672 {
 673         struct gpfs_acl *gpfs_acl;
 674         int result;
 675
 676         gpfs_acl = smb2gpfs_acl(theacl, type);
 677         if (gpfs_acl == NULL) {
 678                 return -1;
 679         }
 680
 681         result = smbd_gpfs_putacl((char *)name, GPFS_PUTACL_STRUCT | GPFS_ACL_SAMBA, gpfs_acl);
 682
 683         SAFE_FREE(gpfs_acl);
 684         return result;
 685 }
 686
 687 int gpfsacl_sys_acl_set_fd(vfs_handle_struct *handle,
 688                             files_struct *fsp,
 689                             SMB_ACL_T theacl)
 690 {
 691         return gpfsacl_sys_acl_set_file(handle, fsp->fsp_name, SMB_ACL_TYPE_ACCESS, theacl);
 692 }
 693
 694 int gpfsacl_sys_acl_delete_def_file(vfs_handle_struct *handle,
 695                                      const char *path)
 696 {
 697         errno = ENOTSUP;
 698         return -1;
 699 }
 700
 701 /*
 702  * Assumed: mode bits are shiftable and standard
 703  * Output: the new aceMask field for an smb nfs4 ace
 704  */
 705 static uint32 gpfsacl_mask_filter(uint32 aceType, uint32 aceMask, uint32 rwx)
 706 {
 707         const uint32 posix_nfs4map[3] = {
 708                 SMB_ACE4_EXECUTE, /* execute */
 709                 SMB_ACE4_WRITE_DATA | SMB_ACE4_APPEND_DATA, /* write; GPFS specific */
 710                 SMB_ACE4_READ_DATA /* read */
 711         };
 712         int     i;
 713         uint32_t        posix_mask = 0x01;
 714         uint32_t        posix_bit;
 715         uint32_t        nfs4_bits;
 716
 717         for(i=0; i<3; i++) {
 718                 nfs4_bits = posix_nfs4map[i];
 719                 posix_bit = rwx & posix_mask;
 720
 721                 if (aceType==SMB_ACE4_ACCESS_ALLOWED_ACE_TYPE) {
 722                         if (posix_bit)
 723                                 aceMask |= nfs4_bits;
 724                         else
 725                                 aceMask &= ~nfs4_bits;
 726                 } else {
 727                         /* add deny bits when suitable */
 728                         if (!posix_bit)
 729                                 aceMask |= nfs4_bits;
 730                         else
 731                                 aceMask &= ~nfs4_bits;
 732                 } /* other ace types are unexpected */
 733
 734                 posix_mask <<= 1;
 735         }
 736
 737         return aceMask;
 738 }
 739
 740 static int gpfsacl_emu_chmod(const char *path, mode_t mode)
 741 {
 742         SMB4ACL_T *pacl = NULL;
 743         int     result;
 744         bool    haveAllowEntry[SMB_ACE4_WHO_EVERYONE + 1] = {False, False, False, False};
 745         int     i;
 746         files_struct    fake_fsp; /* TODO: rationalize parametrization */
 747         SMB4ACE_T       *smbace;
 748
 749         DEBUG(10, ("gpfsacl_emu_chmod invoked for %s mode %o\n", path, mode));
 750
 751         result = gpfs_get_nfs4_acl(path, &pacl);
 752         if (result)
 753                 return result;
 754
 755         if (mode & ~(S_IRWXU | S_IRWXG | S_IRWXO)) {
 756                 DEBUG(2, ("WARNING: cutting extra mode bits %o on %s\n", mode, path));
 757         }
 758
 759         for (smbace=smb_first_ace4(pacl); smbace!=NULL; smbace = smb_next_ace4(smbace)) {
 760                 SMB_ACE4PROP_T  *ace = smb_get_ace4(smbace);
 761                 uint32_t        specid = ace->who.special_id;
 762
 763                 if (ace->flags&SMB_ACE4_ID_SPECIAL &&
 764                     ace->aceType<=SMB_ACE4_ACCESS_DENIED_ACE_TYPE &&
 765                     specid <= SMB_ACE4_WHO_EVERYONE) {
 766
 767                         uint32_t newMask;
 768
 769                         if (ace->aceType==SMB_ACE4_ACCESS_ALLOWED_ACE_TYPE)
 770                                 haveAllowEntry[specid] = True;
 771
 772                         /* mode >> 6 for @owner, mode >> 3 for @group,
 773                          * mode >> 0 for @everyone */
 774                         newMask = gpfsacl_mask_filter(ace->aceType, ace->aceMask,
 775                                                       mode >> ((SMB_ACE4_WHO_EVERYONE - specid) * 3));
 776                         if (ace->aceMask!=newMask) {
 777                                 DEBUG(10, ("ace changed for %s (%o -> %o) id=%d\n",
 778                                            path, ace->aceMask, newMask, specid));
 779                         }
 780                         ace->aceMask = newMask;
 781                 }
 782         }
 783
 784         /* make sure we have at least ALLOW entries
 785          * for all the 3 special ids (@EVERYONE, @OWNER, @GROUP)
 786          * - if necessary
 787          */
 788         for(i = SMB_ACE4_WHO_OWNER; i<=SMB_ACE4_WHO_EVERYONE; i++) {
 789                 SMB_ACE4PROP_T  ace;
 790
 791                 if (haveAllowEntry[i]==True)
 792                         continue;
 793
 794                 ZERO_STRUCT(ace);
 795                 ace.aceType = SMB_ACE4_ACCESS_ALLOWED_ACE_TYPE;
 796                 ace.flags |= SMB_ACE4_ID_SPECIAL;
 797                 ace.who.special_id = i;
 798
 799                 if (i==SMB_ACE4_WHO_GROUP) /* not sure it's necessary... */
 800                         ace.aceFlags |= SMB_ACE4_IDENTIFIER_GROUP;
 801
 802                 ace.aceMask = gpfsacl_mask_filter(ace.aceType, ace.aceMask,
 803                                                   mode >> ((SMB_ACE4_WHO_EVERYONE - i) * 3));
 804
 805                 /* don't add unnecessary aces */
 806                 if (!ace.aceMask)
 807                         continue;
 808
 809                 /* we add it to the END - as windows expects allow aces */
 810                 smb_add_ace4(pacl, &ace);
 811                 DEBUG(10, ("Added ALLOW ace for %s, mode=%o, id=%d, aceMask=%x\n",
 812                            path, mode, i, ace.aceMask));
 813         }
 814
 815         /* don't add complementary DENY ACEs here */
 816         ZERO_STRUCT(fake_fsp);
 817         fake_fsp.fsp_name = (char *)path; /* no file_new is needed here */
 818
 819         /* put the acl */
 820         if (gpfsacl_process_smbacl(&fake_fsp, pacl) == False)
 821                 return -1;
 822         return 0; /* ok for [f]chmod */
 823 }
 824
 825 static int vfs_gpfs_chmod(vfs_handle_struct *handle, const char *path, mode_t mode)
 826 {
 827                  SMB_STRUCT_STAT st;
 828                  int rc;
 829
 830                  if (SMB_VFS_NEXT_STAT(handle, path, &st) != 0) {
 831                          return -1;
 832                  }
 833
 834                  /* avoid chmod() if possible, to preserve acls */
 835                  if ((st.st_mode & ~S_IFMT) == mode) {
 836                          return 0;
 837                  }
 838
 839                  rc = gpfsacl_emu_chmod(path, mode);
 840                  if (rc == 1)
 841                          return SMB_VFS_NEXT_CHMOD(handle, path, mode);
 842                  return rc;
 843 }
 844
 845 static int vfs_gpfs_fchmod(vfs_handle_struct *handle, files_struct *fsp, mode_t mode)
 846 {
 847                  SMB_STRUCT_STAT st;
 848                  int rc;
 849
 850                  if (SMB_VFS_NEXT_FSTAT(handle, fsp, &st) != 0) {
 851                          return -1;
 852                  }
 853
 854                  /* avoid chmod() if possible, to preserve acls */
 855                  if ((st.st_mode & ~S_IFMT) == mode) {
 856                          return 0;
 857                  }
 858
 859                  rc = gpfsacl_emu_chmod(fsp->fsp_name, mode);
 860                  if (rc == 1)
 861                          return SMB_VFS_NEXT_FCHMOD(handle, fsp, mode);
 862                  return rc;
 863 }
 864
 865 /* VFS operations structure */
 866
 867 static vfs_op_tuple gpfs_op_tuples[] = {
 868
 869         { SMB_VFS_OP(vfs_gpfs_kernel_flock),
 870           SMB_VFS_OP_KERNEL_FLOCK,
 871           SMB_VFS_LAYER_OPAQUE },
 872
 873         { SMB_VFS_OP(vfs_gpfs_setlease),
 874           SMB_VFS_OP_LINUX_SETLEASE,
 875           SMB_VFS_LAYER_OPAQUE },
 876
 877         { SMB_VFS_OP(vfs_gpfs_get_real_filename),
 878           SMB_VFS_OP_GET_REAL_FILENAME,
 879           SMB_VFS_LAYER_OPAQUE },
 880
 881         { SMB_VFS_OP(gpfsacl_fget_nt_acl),
 882           SMB_VFS_OP_FGET_NT_ACL,
 883           SMB_VFS_LAYER_TRANSPARENT },
 884
 885         { SMB_VFS_OP(gpfsacl_get_nt_acl),
 886           SMB_VFS_OP_GET_NT_ACL,
 887           SMB_VFS_LAYER_TRANSPARENT },
 888
 889         { SMB_VFS_OP(gpfsacl_fset_nt_acl),
 890           SMB_VFS_OP_FSET_NT_ACL,
 891           SMB_VFS_LAYER_TRANSPARENT },
 892
 893         { SMB_VFS_OP(gpfsacl_sys_acl_get_file),
 894           SMB_VFS_OP_SYS_ACL_GET_FILE,
 895           SMB_VFS_LAYER_TRANSPARENT },
 896
 897         { SMB_VFS_OP(gpfsacl_sys_acl_get_fd),
 898           SMB_VFS_OP_SYS_ACL_GET_FD,
 899           SMB_VFS_LAYER_TRANSPARENT },
 900
 901         { SMB_VFS_OP(gpfsacl_sys_acl_set_file),
 902           SMB_VFS_OP_SYS_ACL_SET_FILE,
 903           SMB_VFS_LAYER_TRANSPARENT },
 904
 905         { SMB_VFS_OP(gpfsacl_sys_acl_set_fd),
 906           SMB_VFS_OP_SYS_ACL_SET_FD,
 907           SMB_VFS_LAYER_TRANSPARENT },
 908
 909         { SMB_VFS_OP(gpfsacl_sys_acl_delete_def_file),
 910           SMB_VFS_OP_SYS_ACL_DELETE_DEF_FILE,
 911           SMB_VFS_LAYER_TRANSPARENT },
 912
 913         { SMB_VFS_OP(vfs_gpfs_chmod),
 914           SMB_VFS_OP_CHMOD,
 915           SMB_VFS_LAYER_TRANSPARENT },
 916
 917         { SMB_VFS_OP(vfs_gpfs_fchmod),
 918           SMB_VFS_OP_FCHMOD,
 919           SMB_VFS_LAYER_TRANSPARENT },
 920
 921         { SMB_VFS_OP(NULL), SMB_VFS_OP_NOOP, SMB_VFS_LAYER_NOOP }
 922
 923 };
 924
 925
 926 NTSTATUS vfs_gpfs_init(void);
 927 NTSTATUS vfs_gpfs_init(void)
 928 {
 929         init_gpfs();
 930
 931         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "gpfs",
 932                                 gpfs_op_tuples);
 933 }