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