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