source/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_close(vfs_handle_struct *handle, files_struct *fsp)
  53 {
  54         if ((fsp->fh != NULL) && (fsp->fh->fd != -1)) {
  55                 set_gpfs_sharemode(fsp, 0, 0);
  56         }
  57
  58         return SMB_VFS_NEXT_CLOSE(handle, fsp);
  59 }
  60
  61 static int vfs_gpfs_setlease(vfs_handle_struct *handle, files_struct *fsp,
  62                              int leasetype)
  63 {
  64         int ret;
  65
  66         START_PROFILE(syscall_linux_setlease);
  67
  68         if ( linux_set_lease_sighandler(fsp->fh->fd) == -1)
  69                 return -1;
  70
  71         ret = set_gpfs_lease(fsp->fh->fd,leasetype);
  72
  73         if ( ret < 0 ) {
  74                 /* This must have come from GPFS not being available */
  75                 /* or some other error, hence call the default */
  76                 ret = linux_setlease(fsp->fh->fd, leasetype);
  77         }
  78
  79         END_PROFILE(syscall_linux_setlease);
  80
  81         return ret;
  82 }
  83
  84 static int vfs_gpfs_get_real_filename(struct vfs_handle_struct *handle,
  85                                       const char *path,
  86                                       const char *name,
  87                                       TALLOC_CTX *mem_ctx,
  88                                       char **found_name)
  89 {
  90         int result;
  91         char *full_path;
  92         char real_pathname[PATH_MAX+1];
  93         int buflen;
  94
  95         full_path = talloc_asprintf(talloc_tos(), "%s/%s", path, name);
  96         if (full_path == NULL) {
  97                 errno = ENOMEM;
  98                 return -1;
  99         }
 100
 101         buflen = sizeof(real_pathname) - 1;
 102
 103         result = smbd_gpfs_get_realfilename_path(full_path, real_pathname,
 104                                                  &buflen);
 105
 106         TALLOC_FREE(full_path);
 107
 108         if ((result == -1) && (errno == ENOSYS)) {
 109                 return SMB_VFS_NEXT_GET_REAL_FILENAME(
 110                         handle, path, name, mem_ctx, found_name);
 111         }
 112
 113         if (result == -1) {
 114                 DEBUG(10, ("smbd_gpfs_get_realfilename_path returned %s\n",
 115                            strerror(errno)));
 116                 return -1;
 117         }
 118
 119         /*
 120          * GPFS does not necessarily null-terminate the returned path
 121          * but instead returns the buffer length in buflen.
 122          */
 123
 124         if (buflen < sizeof(real_pathname)) {
 125                 real_pathname[buflen] = '\0';
 126         } else {
 127                 real_pathname[sizeof(real_pathname)-1] = '\0';
 128         }
 129
 130         DEBUG(10, ("smbd_gpfs_get_realfilename_path: %s/%s -> %s\n",
 131                    path, name, real_pathname));
 132
 133         name = strrchr_m(real_pathname, '/');
 134         if (name == NULL) {
 135                 errno = ENOENT;
 136                 return -1;
 137         }
 138
 139         *found_name = talloc_strdup(mem_ctx, name+1);
 140         if (*found_name == NULL) {
 141                 errno = ENOMEM;
 142                 return -1;
 143         }
 144
 145         return 0;
 146 }
 147
 148 static void gpfs_dumpacl(int level, struct gpfs_acl *gacl)
 149 {
 150         int     i;
 151         if (gacl==NULL)
 152         {
 153                 DEBUG(0, ("gpfs acl is NULL\n"));
 154                 return;
 155         }
 156
 157         DEBUG(level, ("gpfs acl: nace: %d, type:%d, version:%d, level:%d, len:%d\n",
 158                 gacl->acl_nace, gacl->acl_type, gacl->acl_version, gacl->acl_level, gacl->acl_len));
 159         for(i=0; i<gacl->acl_nace; i++)
 160         {
 161                 struct gpfs_ace_v4 *gace = gacl->ace_v4 + i;
 162                 DEBUG(level, ("\tace[%d]: type:%d, flags:0x%x, mask:0x%x, iflags:0x%x, who:%u\n",
 163                         i, gace->aceType, gace->aceFlags, gace->aceMask,
 164                         gace->aceIFlags, gace->aceWho));
 165         }
 166 }
 167
 168 static struct gpfs_acl *gpfs_getacl_alloc(const char *fname, gpfs_aclType_t type)
 169 {
 170         struct gpfs_acl *acl;
 171         size_t len = 200;
 172         int ret;
 173         TALLOC_CTX *mem_ctx = talloc_tos();
 174
 175         acl = (struct gpfs_acl *)TALLOC_SIZE(mem_ctx, len);
 176         if (acl == NULL) {
 177                 errno = ENOMEM;
 178                 return NULL;
 179         }
 180
 181         acl->acl_len = len;
 182         acl->acl_level = 0;
 183         acl->acl_version = 0;
 184         acl->acl_type = type;
 185
 186         ret = smbd_gpfs_getacl((char *)fname, GPFS_GETACL_STRUCT | GPFS_ACL_SAMBA, acl);
 187         if ((ret != 0) && (errno == ENOSPC)) {
 188                 struct gpfs_acl *new_acl = (struct gpfs_acl *)TALLOC_SIZE(
 189                         mem_ctx, acl->acl_len + sizeof(struct gpfs_acl));
 190                 if (new_acl == NULL) {
 191                         errno = ENOMEM;
 192                         return NULL;
 193                 }
 194
 195                 new_acl->acl_len = acl->acl_len;
 196                 new_acl->acl_level = acl->acl_level;
 197                 new_acl->acl_version = acl->acl_version;
 198                 new_acl->acl_type = acl->acl_type;
 199                 acl = new_acl;
 200
 201                 ret = smbd_gpfs_getacl((char *)fname, GPFS_GETACL_STRUCT | GPFS_ACL_SAMBA, acl);
 202         }
 203         if (ret != 0)
 204         {
 205                 DEBUG(8, ("smbd_gpfs_getacl failed with %s\n",strerror(errno)));
 206                 return NULL;
 207         }
 208
 209         return acl;
 210 }
 211
 212 /* Tries to get nfs4 acls and returns SMB ACL allocated.
 213  * On failure returns 1 if it got non-NFSv4 ACL to prompt
 214  * retry with POSIX ACL checks.
 215  * On failure returns -1 if there is system (GPFS) error, check errno.
 216  * Returns 0 on success
 217  */
 218 static int gpfs_get_nfs4_acl(const char *fname, SMB4ACL_T **ppacl)
 219 {
 220         int i;
 221         struct gpfs_acl *gacl = NULL;
 222         DEBUG(10, ("gpfs_get_nfs4_acl invoked for %s\n", fname));
 223
 224         /* First get the real acl length */
 225         gacl = gpfs_getacl_alloc(fname, 0);
 226         if (gacl == NULL) {
 227                 DEBUG(9, ("gpfs_getacl failed for %s with %s\n",
 228                            fname, strerror(errno)));
 229                 return -1;
 230         }
 231
 232         if (gacl->acl_type != GPFS_ACL_TYPE_NFS4) {
 233                 DEBUG(10, ("Got non-nfsv4 acl\n"));
 234                 /* Retry with POSIX ACLs check */
 235                 return 1;
 236         }
 237
 238         *ppacl = smb_create_smb4acl();
 239
 240         DEBUG(10, ("len: %d, level: %d, version: %d, nace: %d\n",
 241                    gacl->acl_len, gacl->acl_level, gacl->acl_version,
 242                    gacl->acl_nace));
 243
 244         for (i=0; i<gacl->acl_nace; i++) {
 245                 struct gpfs_ace_v4 *gace = &gacl->ace_v4[i];
 246                 SMB_ACE4PROP_T smbace;
 247                 DEBUG(10, ("type: %d, iflags: %x, flags: %x, mask: %x, "
 248                            "who: %d\n", gace->aceType, gace->aceIFlags,
 249                            gace->aceFlags, gace->aceMask, gace->aceWho));
 250
 251                 ZERO_STRUCT(smbace);
 252                 if (gace->aceIFlags & ACE4_IFLAG_SPECIAL_ID) {
 253                         smbace.flags |= SMB_ACE4_ID_SPECIAL;
 254                         switch (gace->aceWho) {
 255                         case ACE4_SPECIAL_OWNER:
 256                                 smbace.who.special_id = SMB_ACE4_WHO_OWNER;
 257                                 break;
 258                         case ACE4_SPECIAL_GROUP:
 259                                 smbace.who.special_id = SMB_ACE4_WHO_GROUP;
 260                                 break;
 261                         case ACE4_SPECIAL_EVERYONE:
 262                                 smbace.who.special_id = SMB_ACE4_WHO_EVERYONE;
 263                                 break;
 264                         default:
 265                                 DEBUG(8, ("invalid special gpfs id %d "
 266                                           "ignored\n", gace->aceWho));
 267                                 continue; /* don't add it */
 268                         }
 269                 } else {
 270                         if (gace->aceFlags & ACE4_FLAG_GROUP_ID)
 271                                 smbace.who.gid = gace->aceWho;
 272                         else
 273                                 smbace.who.uid = gace->aceWho;
 274                 }
 275
 276                 /* remove redundent deny entries */
 277                 if (i > 0 && gace->aceType == SMB_ACE4_ACCESS_DENIED_ACE_TYPE) {
 278                         struct gpfs_ace_v4 *prev = &gacl->ace_v4[i-1];
 279                         if (prev->aceType == SMB_ACE4_ACCESS_ALLOWED_ACE_TYPE &&
 280                             prev->aceFlags == gace->aceFlags &&
 281                             prev->aceIFlags == gace->aceIFlags &&
 282                             (gace->aceMask & prev->aceMask) == 0 &&
 283                             gace->aceWho == prev->aceWho) {
 284                                 /* its redundent - skip it */
 285                                 continue;
 286                         }
 287                 }
 288
 289                 smbace.aceType = gace->aceType;
 290                 smbace.aceFlags = gace->aceFlags;
 291                 smbace.aceMask = gace->aceMask;
 292                 smb_add_ace4(*ppacl, &smbace);
 293         }
 294
 295         return 0;
 296 }
 297
 298 static NTSTATUS gpfsacl_fget_nt_acl(vfs_handle_struct *handle,
 299         files_struct *fsp, uint32 security_info,
 300         SEC_DESC **ppdesc)
 301 {
 302         SMB4ACL_T *pacl = NULL;
 303         int     result;
 304
 305         *ppdesc = NULL;
 306         result = gpfs_get_nfs4_acl(fsp->fsp_name, &pacl);
 307
 308         if (result == 0)
 309                 return smb_fget_nt_acl_nfs4(fsp, security_info, ppdesc, pacl);
 310
 311         if (result > 0) {
 312                 DEBUG(10, ("retrying with posix acl...\n"));
 313                 return posix_fget_nt_acl(fsp, security_info, ppdesc);
 314         }
 315
 316         /* GPFS ACL was not read, something wrong happened, error code is set in errno */
 317         return map_nt_error_from_unix(errno);
 318 }
 319
 320 static NTSTATUS gpfsacl_get_nt_acl(vfs_handle_struct *handle,
 321         const char *name,
 322         uint32 security_info, SEC_DESC **ppdesc)
 323 {
 324         SMB4ACL_T *pacl = NULL;
 325         int     result;
 326
 327         *ppdesc = NULL;
 328         result = gpfs_get_nfs4_acl(name, &pacl);
 329
 330         if (result == 0)
 331                 return smb_get_nt_acl_nfs4(handle->conn, name, security_info, ppdesc, pacl);
 332
 333         if (result > 0) {
 334                 DEBUG(10, ("retrying with posix acl...\n"));
 335                 return posix_get_nt_acl(handle->conn, name, security_info, ppdesc);
 336         }
 337
 338         /* GPFS ACL was not read, something wrong happened, error code is set in errno */
 339         return map_nt_error_from_unix(errno);
 340 }
 341
 342 static bool gpfsacl_process_smbacl(files_struct *fsp, SMB4ACL_T *smbacl)
 343 {
 344         int ret;
 345         gpfs_aclLen_t gacl_len;
 346         SMB4ACE_T       *smbace;
 347         struct gpfs_acl *gacl;
 348         TALLOC_CTX *mem_ctx  = talloc_tos();
 349
 350         gacl_len = sizeof(struct gpfs_acl) +
 351                 (smb_get_naces(smbacl)-1)*sizeof(gpfs_ace_v4_t);
 352
 353         gacl = TALLOC_SIZE(mem_ctx, gacl_len);
 354         if (gacl == NULL) {
 355                 DEBUG(0, ("talloc failed\n"));
 356                 errno = ENOMEM;
 357                 return False;
 358         }
 359
 360         gacl->acl_len = gacl_len;
 361         gacl->acl_level = 0;
 362         gacl->acl_version = GPFS_ACL_VERSION_NFS4;
 363         gacl->acl_type = GPFS_ACL_TYPE_NFS4;
 364         gacl->acl_nace = 0; /* change later... */
 365
 366         for (smbace=smb_first_ace4(smbacl); smbace!=NULL; smbace = smb_next_ace4(smbace)) {
 367                 struct gpfs_ace_v4 *gace = &gacl->ace_v4[gacl->acl_nace];
 368                 SMB_ACE4PROP_T  *aceprop = smb_get_ace4(smbace);
 369
 370                 gace->aceType = aceprop->aceType;
 371                 gace->aceFlags = aceprop->aceFlags;
 372                 gace->aceMask = aceprop->aceMask;
 373
 374                 /*
 375                  * GPFS can't distinguish between WRITE and APPEND on
 376                  * files, so one being set without the other is an
 377                  * error. Sorry for the many ()'s :-)
 378                  */
 379
 380                 if (!fsp->is_directory
 381                     &&
 382                     ((((gace->aceMask & ACE4_MASK_WRITE) == 0)
 383                       && ((gace->aceMask & ACE4_MASK_APPEND) != 0))
 384                      ||
 385                      (((gace->aceMask & ACE4_MASK_WRITE) != 0)
 386                       && ((gace->aceMask & ACE4_MASK_APPEND) == 0)))
 387                     &&
 388                     lp_parm_bool(fsp->conn->params->service, "gpfs",
 389                                  "merge_writeappend", True)) {
 390                         DEBUG(2, ("vfs_gpfs.c: file [%s]: ACE contains "
 391                                   "WRITE^APPEND, setting WRITE|APPEND\n",
 392                                   fsp->fsp_name));
 393                         gace->aceMask |= ACE4_MASK_WRITE|ACE4_MASK_APPEND;
 394                 }
 395
 396                 gace->aceIFlags = (aceprop->flags&SMB_ACE4_ID_SPECIAL) ? ACE4_IFLAG_SPECIAL_ID : 0;
 397
 398                 if (aceprop->flags&SMB_ACE4_ID_SPECIAL)
 399                 {
 400                         switch(aceprop->who.special_id)
 401                         {
 402                         case SMB_ACE4_WHO_EVERYONE:
 403                                 gace->aceWho = ACE4_SPECIAL_EVERYONE;
 404                                 break;
 405                         case SMB_ACE4_WHO_OWNER:
 406                                 gace->aceWho = ACE4_SPECIAL_OWNER;
 407                                 break;
 408                         case SMB_ACE4_WHO_GROUP:
 409                                 gace->aceWho = ACE4_SPECIAL_GROUP;
 410                                 break;
 411                         default:
 412                                 DEBUG(8, ("unsupported special_id %d\n", aceprop->who.special_id));
 413                                 continue; /* don't add it !!! */
 414                         }
 415                 } else {
 416                         /* just only for the type safety... */
 417                         if (aceprop->aceFlags&SMB_ACE4_IDENTIFIER_GROUP)
 418                                 gace->aceWho = aceprop->who.gid;
 419                         else
 420                                 gace->aceWho = aceprop->who.uid;
 421                 }
 422
 423                 gacl->acl_nace++;
 424         }
 425
 426         ret = smbd_gpfs_putacl(fsp->fsp_name, GPFS_PUTACL_STRUCT | GPFS_ACL_SAMBA, gacl);
 427         if (ret != 0) {
 428                 DEBUG(8, ("gpfs_putacl failed with %s\n", strerror(errno)));
 429                 gpfs_dumpacl(8, gacl);
 430                 return False;
 431         }
 432
 433         DEBUG(10, ("gpfs_putacl succeeded\n"));
 434         return True;
 435 }
 436
 437 static NTSTATUS gpfsacl_set_nt_acl_internal(files_struct *fsp, uint32 security_info_sent, SEC_DESC *psd)
 438 {
 439         struct gpfs_acl *acl;
 440         NTSTATUS result = NT_STATUS_ACCESS_DENIED;
 441
 442         acl = gpfs_getacl_alloc(fsp->fsp_name, 0);
 443         if (acl == NULL)
 444                 return result;
 445
 446         if (acl->acl_version&GPFS_ACL_VERSION_NFS4)
 447         {
 448                 result = smb_set_nt_acl_nfs4(
 449                         fsp, security_info_sent, psd,
 450                         gpfsacl_process_smbacl);
 451         } else { /* assume POSIX ACL - by default... */
 452                 result = set_nt_acl(fsp, security_info_sent, psd);
 453         }
 454
 455         return result;
 456 }
 457
 458 static NTSTATUS gpfsacl_fset_nt_acl(vfs_handle_struct *handle, files_struct *fsp, uint32 security_info_sent, SEC_DESC *psd)
 459 {
 460         return gpfsacl_set_nt_acl_internal(fsp, security_info_sent, psd);
 461 }
 462
 463 static NTSTATUS gpfsacl_set_nt_acl(vfs_handle_struct *handle, files_struct *fsp, char *name, uint32 security_info_sent, SEC_DESC *psd)
 464 {
 465         return gpfsacl_set_nt_acl_internal(fsp, security_info_sent, psd);
 466 }
 467
 468 static SMB_ACL_T gpfs2smb_acl(const struct gpfs_acl *pacl)
 469 {
 470         SMB_ACL_T result;
 471         int i;
 472
 473         result = sys_acl_init(pacl->acl_nace);
 474         if (result == NULL) {
 475                 errno = ENOMEM;
 476                 return NULL;
 477         }
 478
 479         result->count = pacl->acl_nace;
 480
 481         for (i=0; i<pacl->acl_nace; i++) {
 482                 struct smb_acl_entry *ace = &result->acl[i];
 483                 const struct gpfs_ace_v1 *g_ace = &pacl->ace_v1[i];
 484
 485                 DEBUG(10, ("Converting type %d id %lu perm %x\n",
 486                            (int)g_ace->ace_type, (unsigned long)g_ace->ace_who,
 487                            (int)g_ace->ace_perm));
 488
 489                 switch (g_ace->ace_type) {
 490                 case GPFS_ACL_USER:
 491                         ace->a_type = SMB_ACL_USER;
 492                         ace->uid = (uid_t)g_ace->ace_who;
 493                         break;
 494                 case GPFS_ACL_USER_OBJ:
 495                         ace->a_type = SMB_ACL_USER_OBJ;
 496                         break;
 497                 case GPFS_ACL_GROUP:
 498                         ace->a_type = SMB_ACL_GROUP;
 499                         ace->gid = (gid_t)g_ace->ace_who;
 500                         break;
 501                 case GPFS_ACL_GROUP_OBJ:
 502                         ace->a_type = SMB_ACL_GROUP_OBJ;
 503                         break;
 504                 case GPFS_ACL_OTHER:
 505                         ace->a_type = SMB_ACL_OTHER;
 506                         break;
 507                 case GPFS_ACL_MASK:
 508                         ace->a_type = SMB_ACL_MASK;
 509                         break;
 510                 default:
 511                         DEBUG(10, ("Got invalid ace_type: %d\n",
 512                                    g_ace->ace_type));
 513                         errno = EINVAL;
 514                         SAFE_FREE(result);
 515                         return NULL;
 516                 }
 517
 518                 ace->a_perm = 0;
 519                 ace->a_perm |= (g_ace->ace_perm & ACL_PERM_READ) ?
 520                         SMB_ACL_READ : 0;
 521                 ace->a_perm |= (g_ace->ace_perm & ACL_PERM_WRITE) ?
 522                         SMB_ACL_WRITE : 0;
 523                 ace->a_perm |= (g_ace->ace_perm & ACL_PERM_EXECUTE) ?
 524                         SMB_ACL_EXECUTE : 0;
 525
 526                 DEBUGADD(10, ("Converted to %d perm %x\n",
 527                               ace->a_type, ace->a_perm));
 528         }
 529
 530         return result;
 531 }
 532
 533 static SMB_ACL_T gpfsacl_get_posix_acl(const char *path, gpfs_aclType_t type)
 534 {
 535         struct gpfs_acl *pacl;
 536         SMB_ACL_T result = NULL;
 537
 538         pacl = gpfs_getacl_alloc(path, type);
 539
 540         if (pacl == NULL) {
 541                 DEBUG(10, ("gpfs_getacl failed for %s with %s\n",
 542                            path, strerror(errno)));
 543                 if (errno == 0) {
 544                         errno = EINVAL;
 545                 }
 546                 goto done;
 547         }
 548
 549         if (pacl->acl_version != GPFS_ACL_VERSION_POSIX) {
 550                 DEBUG(10, ("Got acl version %d, expected %d\n",
 551                            pacl->acl_version, GPFS_ACL_VERSION_POSIX));
 552                 errno = EINVAL;
 553                 goto done;
 554         }
 555
 556         DEBUG(10, ("len: %d, level: %d, version: %d, nace: %d\n",
 557                    pacl->acl_len, pacl->acl_level, pacl->acl_version,
 558                    pacl->acl_nace));
 559
 560         result = gpfs2smb_acl(pacl);
 561         if (result == NULL) {
 562                 goto done;
 563         }
 564
 565  done:
 566
 567         if (errno != 0) {
 568                 SAFE_FREE(result);
 569         }
 570         return result;
 571 }
 572
 573 SMB_ACL_T gpfsacl_sys_acl_get_file(vfs_handle_struct *handle,
 574                                     const char *path_p,
 575                                     SMB_ACL_TYPE_T type)
 576 {
 577         gpfs_aclType_t gpfs_type;
 578
 579         switch(type) {
 580         case SMB_ACL_TYPE_ACCESS:
 581                 gpfs_type = GPFS_ACL_TYPE_ACCESS;
 582                 break;
 583         case SMB_ACL_TYPE_DEFAULT:
 584                 gpfs_type = GPFS_ACL_TYPE_DEFAULT;
 585                 break;
 586         default:
 587                 DEBUG(0, ("Got invalid type: %d\n", type));
 588                 smb_panic("exiting");
 589         }
 590
 591         return gpfsacl_get_posix_acl(path_p, gpfs_type);
 592 }
 593
 594 SMB_ACL_T gpfsacl_sys_acl_get_fd(vfs_handle_struct *handle,
 595                                  files_struct *fsp)
 596 {
 597         return gpfsacl_get_posix_acl(fsp->fsp_name, GPFS_ACL_TYPE_ACCESS);
 598 }
 599
 600 static struct gpfs_acl *smb2gpfs_acl(const SMB_ACL_T pacl,
 601                                      SMB_ACL_TYPE_T type)
 602 {
 603         gpfs_aclLen_t len;
 604         struct gpfs_acl *result;
 605         int i;
 606         union gpfs_ace_union
 607         {
 608                 gpfs_ace_v1_t  ace_v1[1]; /* when GPFS_ACL_VERSION_POSIX */
 609                 gpfs_ace_v4_t  ace_v4[1]; /* when GPFS_ACL_VERSION_NFS4  */
 610         };
 611
 612         DEBUG(10, ("smb2gpfs_acl: Got ACL with %d entries\n", pacl->count));
 613
 614         len = sizeof(struct gpfs_acl) - sizeof(union gpfs_ace_union) +
 615                 (pacl->count)*sizeof(gpfs_ace_v1_t);
 616
 617         result = SMB_MALLOC(len);
 618         if (result == NULL) {
 619                 errno = ENOMEM;
 620                 return result;
 621         }
 622
 623         result->acl_len = len;
 624         result->acl_level = 0;
 625         result->acl_version = GPFS_ACL_VERSION_POSIX;
 626         result->acl_type = (type == SMB_ACL_TYPE_DEFAULT) ?
 627                 GPFS_ACL_TYPE_DEFAULT : GPFS_ACL_TYPE_ACCESS;
 628         result->acl_nace = pacl->count;
 629
 630         for (i=0; i<pacl->count; i++) {
 631                 const struct smb_acl_entry *ace = &pacl->acl[i];
 632                 struct gpfs_ace_v1 *g_ace = &result->ace_v1[i];
 633
 634                 DEBUG(10, ("Converting type %d perm %x\n",
 635                            (int)ace->a_type, (int)ace->a_perm));
 636
 637                 g_ace->ace_perm = 0;
 638
 639                 switch(ace->a_type) {
 640                 case SMB_ACL_USER:
 641                         g_ace->ace_type = GPFS_ACL_USER;
 642                         g_ace->ace_who = (gpfs_uid_t)ace->uid;
 643                         break;
 644                 case SMB_ACL_USER_OBJ:
 645                         g_ace->ace_type = GPFS_ACL_USER_OBJ;
 646                         g_ace->ace_perm |= ACL_PERM_CONTROL;
 647                         g_ace->ace_who = 0;
 648                         break;
 649                 case SMB_ACL_GROUP:
 650                         g_ace->ace_type = GPFS_ACL_GROUP;
 651                         g_ace->ace_who = (gpfs_uid_t)ace->gid;
 652                         break;
 653                 case SMB_ACL_GROUP_OBJ:
 654                         g_ace->ace_type = GPFS_ACL_GROUP_OBJ;
 655                         g_ace->ace_who = 0;
 656                         break;
 657                 case SMB_ACL_MASK:
 658                         g_ace->ace_type = GPFS_ACL_MASK;
 659                         g_ace->ace_perm = 0x8f;
 660                         g_ace->ace_who = 0;
 661                         break;
 662                 case SMB_ACL_OTHER:
 663                         g_ace->ace_type = GPFS_ACL_OTHER;
 664                         g_ace->ace_who = 0;
 665                         break;
 666                 default:
 667                         DEBUG(10, ("Got invalid ace_type: %d\n", ace->a_type));
 668                         errno = EINVAL;
 669                         SAFE_FREE(result);
 670                         return NULL;
 671                 }
 672
 673                 g_ace->ace_perm |= (ace->a_perm & SMB_ACL_READ) ?
 674                         ACL_PERM_READ : 0;
 675                 g_ace->ace_perm |= (ace->a_perm & SMB_ACL_WRITE) ?
 676                         ACL_PERM_WRITE : 0;
 677                 g_ace->ace_perm |= (ace->a_perm & SMB_ACL_EXECUTE) ?
 678                         ACL_PERM_EXECUTE : 0;
 679
 680                 DEBUGADD(10, ("Converted to %d id %d perm %x\n",
 681                               g_ace->ace_type, g_ace->ace_who, g_ace->ace_perm));
 682         }
 683
 684         return result;
 685 }
 686
 687 int gpfsacl_sys_acl_set_file(vfs_handle_struct *handle,
 688                               const char *name,
 689                               SMB_ACL_TYPE_T type,
 690                               SMB_ACL_T theacl)
 691 {
 692         struct gpfs_acl *gpfs_acl;
 693         int result;
 694
 695         gpfs_acl = smb2gpfs_acl(theacl, type);
 696         if (gpfs_acl == NULL) {
 697                 return -1;
 698         }
 699
 700         result = smbd_gpfs_putacl((char *)name, GPFS_PUTACL_STRUCT | GPFS_ACL_SAMBA, gpfs_acl);
 701
 702         SAFE_FREE(gpfs_acl);
 703         return result;
 704 }
 705
 706 int gpfsacl_sys_acl_set_fd(vfs_handle_struct *handle,
 707                             files_struct *fsp,
 708                             SMB_ACL_T theacl)
 709 {
 710         return gpfsacl_sys_acl_set_file(handle, fsp->fsp_name, SMB_ACL_TYPE_ACCESS, theacl);
 711 }
 712
 713 int gpfsacl_sys_acl_delete_def_file(vfs_handle_struct *handle,
 714                                      const char *path)
 715 {
 716         errno = ENOTSUP;
 717         return -1;
 718 }
 719
 720 /*
 721  * Assumed: mode bits are shiftable and standard
 722  * Output: the new aceMask field for an smb nfs4 ace
 723  */
 724 static uint32 gpfsacl_mask_filter(uint32 aceType, uint32 aceMask, uint32 rwx)
 725 {
 726         const uint32 posix_nfs4map[3] = {
 727                 SMB_ACE4_EXECUTE, /* execute */
 728                 SMB_ACE4_WRITE_DATA | SMB_ACE4_APPEND_DATA, /* write; GPFS specific */
 729                 SMB_ACE4_READ_DATA /* read */
 730         };
 731         int     i;
 732         uint32_t        posix_mask = 0x01;
 733         uint32_t        posix_bit;
 734         uint32_t        nfs4_bits;
 735
 736         for(i=0; i<3; i++) {
 737                 nfs4_bits = posix_nfs4map[i];
 738                 posix_bit = rwx & posix_mask;
 739
 740                 if (aceType==SMB_ACE4_ACCESS_ALLOWED_ACE_TYPE) {
 741                         if (posix_bit)
 742                                 aceMask |= nfs4_bits;
 743                         else
 744                                 aceMask &= ~nfs4_bits;
 745                 } else {
 746                         /* add deny bits when suitable */
 747                         if (!posix_bit)
 748                                 aceMask |= nfs4_bits;
 749                         else
 750                                 aceMask &= ~nfs4_bits;
 751                 } /* other ace types are unexpected */
 752
 753                 posix_mask <<= 1;
 754         }
 755
 756         return aceMask;
 757 }
 758
 759 static int gpfsacl_emu_chmod(const char *path, mode_t mode)
 760 {
 761         SMB4ACL_T *pacl = NULL;
 762         int     result;
 763         bool    haveAllowEntry[SMB_ACE4_WHO_EVERYONE + 1] = {False, False, False, False};
 764         int     i;
 765         files_struct    fake_fsp; /* TODO: rationalize parametrization */
 766         SMB4ACE_T       *smbace;
 767
 768         DEBUG(10, ("gpfsacl_emu_chmod invoked for %s mode %o\n", path, mode));
 769
 770         result = gpfs_get_nfs4_acl(path, &pacl);
 771         if (result)
 772                 return result;
 773
 774         if (mode & ~(S_IRWXU | S_IRWXG | S_IRWXO)) {
 775                 DEBUG(2, ("WARNING: cutting extra mode bits %o on %s\n", mode, path));
 776         }
 777
 778         for (smbace=smb_first_ace4(pacl); smbace!=NULL; smbace = smb_next_ace4(smbace)) {
 779                 SMB_ACE4PROP_T  *ace = smb_get_ace4(smbace);
 780                 uint32_t        specid = ace->who.special_id;
 781
 782                 if (ace->flags&SMB_ACE4_ID_SPECIAL &&
 783                     ace->aceType<=SMB_ACE4_ACCESS_DENIED_ACE_TYPE &&
 784                     specid <= SMB_ACE4_WHO_EVERYONE) {
 785
 786                         uint32_t newMask;
 787
 788                         if (ace->aceType==SMB_ACE4_ACCESS_ALLOWED_ACE_TYPE)
 789                                 haveAllowEntry[specid] = True;
 790
 791                         /* mode >> 6 for @owner, mode >> 3 for @group,
 792                          * mode >> 0 for @everyone */
 793                         newMask = gpfsacl_mask_filter(ace->aceType, ace->aceMask,
 794                                                       mode >> ((SMB_ACE4_WHO_EVERYONE - specid) * 3));
 795                         if (ace->aceMask!=newMask) {
 796                                 DEBUG(10, ("ace changed for %s (%o -> %o) id=%d\n",
 797                                            path, ace->aceMask, newMask, specid));
 798                         }
 799                         ace->aceMask = newMask;
 800                 }
 801         }
 802
 803         /* make sure we have at least ALLOW entries
 804          * for all the 3 special ids (@EVERYONE, @OWNER, @GROUP)
 805          * - if necessary
 806          */
 807         for(i = SMB_ACE4_WHO_OWNER; i<=SMB_ACE4_WHO_EVERYONE; i++) {
 808                 SMB_ACE4PROP_T  ace;
 809
 810                 if (haveAllowEntry[i]==True)
 811                         continue;
 812
 813                 ZERO_STRUCT(ace);
 814                 ace.aceType = SMB_ACE4_ACCESS_ALLOWED_ACE_TYPE;
 815                 ace.flags |= SMB_ACE4_ID_SPECIAL;
 816                 ace.who.special_id = i;
 817
 818                 if (i==SMB_ACE4_WHO_GROUP) /* not sure it's necessary... */
 819                         ace.aceFlags |= SMB_ACE4_IDENTIFIER_GROUP;
 820
 821                 ace.aceMask = gpfsacl_mask_filter(ace.aceType, ace.aceMask,
 822                                                   mode >> ((SMB_ACE4_WHO_EVERYONE - i) * 3));
 823
 824                 /* don't add unnecessary aces */
 825                 if (!ace.aceMask)
 826                         continue;
 827
 828                 /* we add it to the END - as windows expects allow aces */
 829                 smb_add_ace4(pacl, &ace);
 830                 DEBUG(10, ("Added ALLOW ace for %s, mode=%o, id=%d, aceMask=%x\n",
 831                            path, mode, i, ace.aceMask));
 832         }
 833
 834         /* don't add complementary DENY ACEs here */
 835         ZERO_STRUCT(fake_fsp);
 836         fake_fsp.fsp_name = (char *)path; /* no file_new is needed here */
 837
 838         /* put the acl */
 839         if (gpfsacl_process_smbacl(&fake_fsp, pacl) == False)
 840                 return -1;
 841         return 0; /* ok for [f]chmod */
 842 }
 843
 844 static int vfs_gpfs_chmod(vfs_handle_struct *handle, const char *path, mode_t mode)
 845 {
 846                  SMB_STRUCT_STAT st;
 847                  int rc;
 848
 849                  if (SMB_VFS_NEXT_STAT(handle, path, &st) != 0) {
 850                          return -1;
 851                  }
 852
 853                  /* avoid chmod() if possible, to preserve acls */
 854                  if ((st.st_mode & ~S_IFMT) == mode) {
 855                          return 0;
 856                  }
 857
 858                  rc = gpfsacl_emu_chmod(path, mode);
 859                  if (rc == 1)
 860                          return SMB_VFS_NEXT_CHMOD(handle, path, mode);
 861                  return rc;
 862 }
 863
 864 static int vfs_gpfs_fchmod(vfs_handle_struct *handle, files_struct *fsp, mode_t mode)
 865 {
 866                  SMB_STRUCT_STAT st;
 867                  int rc;
 868
 869                  if (SMB_VFS_NEXT_FSTAT(handle, fsp, &st) != 0) {
 870                          return -1;
 871                  }
 872
 873                  /* avoid chmod() if possible, to preserve acls */
 874                  if ((st.st_mode & ~S_IFMT) == mode) {
 875                          return 0;
 876                  }
 877
 878                  rc = gpfsacl_emu_chmod(fsp->fsp_name, mode);
 879                  if (rc == 1)
 880                          return SMB_VFS_NEXT_FCHMOD(handle, fsp, mode);
 881                  return rc;
 882 }
 883
 884 /* VFS operations structure */
 885
 886 static vfs_op_tuple gpfs_op_tuples[] = {
 887
 888         { SMB_VFS_OP(vfs_gpfs_kernel_flock),
 889           SMB_VFS_OP_KERNEL_FLOCK,
 890           SMB_VFS_LAYER_OPAQUE },
 891
 892         { SMB_VFS_OP(vfs_gpfs_setlease),
 893           SMB_VFS_OP_LINUX_SETLEASE,
 894           SMB_VFS_LAYER_OPAQUE },
 895
 896         { SMB_VFS_OP(vfs_gpfs_get_real_filename),
 897           SMB_VFS_OP_GET_REAL_FILENAME,
 898           SMB_VFS_LAYER_OPAQUE },
 899
 900         { SMB_VFS_OP(gpfsacl_fget_nt_acl),
 901           SMB_VFS_OP_FGET_NT_ACL,
 902           SMB_VFS_LAYER_TRANSPARENT },
 903
 904         { SMB_VFS_OP(gpfsacl_get_nt_acl),
 905           SMB_VFS_OP_GET_NT_ACL,
 906           SMB_VFS_LAYER_TRANSPARENT },
 907
 908         { SMB_VFS_OP(gpfsacl_fset_nt_acl),
 909           SMB_VFS_OP_FSET_NT_ACL,
 910           SMB_VFS_LAYER_TRANSPARENT },
 911
 912         { SMB_VFS_OP(gpfsacl_set_nt_acl),
 913           SMB_VFS_OP_SET_NT_ACL,
 914           SMB_VFS_LAYER_TRANSPARENT },
 915
 916         { SMB_VFS_OP(gpfsacl_sys_acl_get_file),
 917           SMB_VFS_OP_SYS_ACL_GET_FILE,
 918           SMB_VFS_LAYER_TRANSPARENT },
 919
 920         { SMB_VFS_OP(gpfsacl_sys_acl_get_fd),
 921           SMB_VFS_OP_SYS_ACL_GET_FD,
 922           SMB_VFS_LAYER_TRANSPARENT },
 923
 924         { SMB_VFS_OP(gpfsacl_sys_acl_set_file),
 925           SMB_VFS_OP_SYS_ACL_SET_FILE,
 926           SMB_VFS_LAYER_TRANSPARENT },
 927
 928         { SMB_VFS_OP(gpfsacl_sys_acl_set_fd),
 929           SMB_VFS_OP_SYS_ACL_SET_FD,
 930           SMB_VFS_LAYER_TRANSPARENT },
 931
 932         { SMB_VFS_OP(gpfsacl_sys_acl_delete_def_file),
 933           SMB_VFS_OP_SYS_ACL_DELETE_DEF_FILE,
 934           SMB_VFS_LAYER_TRANSPARENT },
 935
 936         { SMB_VFS_OP(vfs_gpfs_chmod),
 937           SMB_VFS_OP_CHMOD,
 938           SMB_VFS_LAYER_TRANSPARENT },
 939
 940         { SMB_VFS_OP(vfs_gpfs_fchmod),
 941           SMB_VFS_OP_FCHMOD,
 942           SMB_VFS_LAYER_TRANSPARENT },
 943
 944         { SMB_VFS_OP(vfs_gpfs_close),
 945           SMB_VFS_OP_CLOSE,
 946           SMB_VFS_LAYER_TRANSPARENT },
 947
 948         { SMB_VFS_OP(NULL), SMB_VFS_OP_NOOP, SMB_VFS_LAYER_NOOP }
 949
 950 };
 951
 952
 953 NTSTATUS vfs_gpfs_init(void);
 954 NTSTATUS vfs_gpfs_init(void)
 955 {
 956         init_gpfs();
 957
 958         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "gpfs",
 959                                 gpfs_op_tuples);
 960 }