source3/modules/vfs_gpfs.c

   1 /*
   2  *  Unix SMB/CIFS implementation.
   3  *  Samba VFS module for GPFS filesystem
   4  *  Copyright (C) Christian Ambach <cambach1@de.ibm.com> 2006
   5  *  Copyright (C) Christof Schmitt 2015
   6  *  Major code contributions by Chetan Shringarpure <chetan.sh@in.ibm.com>
   7  *                           and Gomati Mohanan <gomati.mohanan@in.ibm.com>
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License as published by
  11  *  the Free Software Foundation; either version 3 of the License, or
  12  *  (at your option) any later version.
  13  *
  14  *  This program is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License
  20  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  21  */
  22
  23 #include "includes.h"
  24 #include "smbd/smbd.h"
  25 #include "include/smbprofile.h"
  26 #include "modules/non_posix_acls.h"
  27 #include "libcli/security/security.h"
  28 #include "nfs4_acls.h"
  29 #include "system/filesys.h"
  30 #include "auth.h"
  31 #include "lib/util/tevent_unix.h"
  32 #include "lib/util/gpfswrap.h"
  33
  34 #include <gnutls/gnutls.h>
  35 #include <gnutls/crypto.h>
  36 #include "lib/crypto/gnutls_helpers.h"
  37
  38 #undef DBGC_CLASS
  39 #define DBGC_CLASS DBGC_VFS
  40
  41 #ifndef GPFS_GETACL_NATIVE
  42 #define GPFS_GETACL_NATIVE 0x00000004
  43 #endif
  44
  45 struct gpfs_config_data {
  46         struct smbacl4_vfs_params nfs4_params;
  47         bool sharemodes;
  48         bool leases;
  49         bool hsm;
  50         bool syncio;
  51         bool winattr;
  52         bool ftruncate;
  53         bool getrealfilename;
  54         bool dfreequota;
  55         bool acl;
  56         bool settimes;
  57         bool recalls;
  58         struct {
  59                 bool gpfs_fstat_x;
  60         } pathref_ok;
  61 };
  62
  63 struct gpfs_fsp_extension {
  64         bool offline;
  65 };
  66
  67 static inline unsigned int gpfs_acl_flags(gpfs_acl_t *gacl)
  68 {
  69         if (gacl->acl_level == GPFS_ACL_LEVEL_V4FLAGS) {
  70                 return gacl->v4Level1.acl_flags;
  71         }
  72         return 0;
  73 }
  74
  75 static inline gpfs_ace_v4_t *gpfs_ace_ptr(gpfs_acl_t *gacl, unsigned int i)
  76 {
  77         if (gacl->acl_level == GPFS_ACL_LEVEL_V4FLAGS) {
  78                 return &gacl->v4Level1.ace_v4[i];
  79         }
  80         return &gacl->ace_v4[i];
  81 }
  82
  83 static unsigned int vfs_gpfs_access_mask_to_allow(uint32_t access_mask)
  84 {
  85         unsigned int allow = GPFS_SHARE_NONE;
  86
  87         if (access_mask & (FILE_WRITE_DATA|FILE_APPEND_DATA)) {
  88                 allow |= GPFS_SHARE_WRITE;
  89         }
  90         if (access_mask & (FILE_READ_DATA|FILE_EXECUTE)) {
  91                 allow |= GPFS_SHARE_READ;
  92         }
  93
  94         return allow;
  95 }
  96
  97 static unsigned int vfs_gpfs_share_access_to_deny(uint32_t share_access)
  98 {
  99         unsigned int deny = GPFS_DENY_NONE;
 100
 101         if (!(share_access & FILE_SHARE_WRITE)) {
 102                 deny |= GPFS_DENY_WRITE;
 103         }
 104         if (!(share_access & FILE_SHARE_READ)) {
 105                 deny |= GPFS_DENY_READ;
 106         }
 107
 108         /*
 109          * GPFS_DENY_DELETE can only be set together with either
 110          * GPFS_DENY_WRITE or GPFS_DENY_READ.
 111          */
 112         if ((deny & (GPFS_DENY_WRITE|GPFS_DENY_READ)) &&
 113             !(share_access & FILE_SHARE_DELETE)) {
 114                 deny |= GPFS_DENY_DELETE;
 115         }
 116
 117         return deny;
 118 }
 119
 120 static int set_gpfs_sharemode(files_struct *fsp, uint32_t access_mask,
 121                               uint32_t share_access)
 122 {
 123         unsigned int allow = GPFS_SHARE_NONE;
 124         unsigned int deny = GPFS_DENY_NONE;
 125         int result;
 126
 127         if (access_mask == 0) {
 128                 DBG_DEBUG("Clearing file system share mode.\n");
 129         } else {
 130                 allow = vfs_gpfs_access_mask_to_allow(access_mask);
 131                 deny = vfs_gpfs_share_access_to_deny(share_access);
 132         }
 133         DBG_DEBUG("access_mask=0x%x, allow=0x%x, share_access=0x%x, "
 134                   "deny=0x%x\n", access_mask, allow, share_access, deny);
 135
 136         result = gpfswrap_set_share(fsp_get_io_fd(fsp), allow, deny);
 137         if (result == 0) {
 138                 return 0;
 139         }
 140
 141         if (errno == EACCES) {
 142                 DBG_NOTICE("GPFS share mode denied for %s/%s.\n",
 143                            fsp->conn->connectpath,
 144                            fsp->fsp_name->base_name);
 145         } else if (errno == EPERM) {
 146                 DBG_ERR("Samba requested GPFS sharemode for %s/%s, but the "
 147                         "GPFS file system is not configured accordingly. "
 148                         "Configure file system with mmchfs -D nfs4 or "
 149                         "set gpfs:sharemodes=no in Samba.\n",
 150                         fsp->conn->connectpath,
 151                         fsp->fsp_name->base_name);
 152         } else {
 153                 DBG_ERR("gpfs_set_share failed: %s\n", strerror(errno));
 154         }
 155
 156         return result;
 157 }
 158
 159 static int vfs_gpfs_filesystem_sharemode(vfs_handle_struct *handle,
 160                                          files_struct *fsp,
 161                                          uint32_t share_access,
 162                                          uint32_t access_mask)
 163 {
 164
 165         struct gpfs_config_data *config;
 166         int ret = 0;
 167
 168         SMB_VFS_HANDLE_GET_DATA(handle, config,
 169                                 struct gpfs_config_data,
 170                                 return -1);
 171
 172         if(!config->sharemodes) {
 173                 return 0;
 174         }
 175
 176         /*
 177          * A named stream fsp will have the basefile open in the fsp
 178          * fd, so lacking a distinct fd for the stream we have to skip
 179          * set_gpfs_sharemode for stream.
 180          */
 181         if (fsp_is_alternate_stream(fsp)) {
 182                 DBG_NOTICE("Not requesting GPFS sharemode on stream: %s/%s\n",
 183                            fsp->conn->connectpath,
 184                            fsp_str_dbg(fsp));
 185                 return 0;
 186         }
 187
 188         ret = set_gpfs_sharemode(fsp, access_mask, share_access);
 189
 190         return ret;
 191 }
 192
 193 static int vfs_gpfs_close(vfs_handle_struct *handle, files_struct *fsp)
 194 {
 195
 196         struct gpfs_config_data *config;
 197
 198         SMB_VFS_HANDLE_GET_DATA(handle, config,
 199                                 struct gpfs_config_data,
 200                                 return -1);
 201
 202         if (config->sharemodes &&
 203             (fsp->fsp_flags.kernel_share_modes_taken))
 204         {
 205                 /*
 206                  * Always clear GPFS sharemode in case the actual
 207                  * close gets deferred due to outstanding POSIX locks
 208                  * (see fd_close_posix)
 209                  */
 210                 int ret = gpfswrap_set_share(fsp_get_io_fd(fsp), 0, 0);
 211                 if (ret != 0) {
 212                         DBG_ERR("Clearing GPFS sharemode on close failed for "
 213                                 " %s/%s: %s\n",
 214                                 fsp->conn->connectpath,
 215                                 fsp->fsp_name->base_name,
 216                                 strerror(errno));
 217                 }
 218         }
 219
 220         return SMB_VFS_NEXT_CLOSE(handle, fsp);
 221 }
 222
 223 #ifdef HAVE_KERNEL_OPLOCKS_LINUX
 224 static int lease_type_to_gpfs(int leasetype)
 225 {
 226         if (leasetype == F_RDLCK) {
 227                 return GPFS_LEASE_READ;
 228         }
 229
 230         if (leasetype == F_WRLCK) {
 231                 return GPFS_LEASE_WRITE;
 232         }
 233
 234         return GPFS_LEASE_NONE;
 235 }
 236
 237 static int vfs_gpfs_setlease(vfs_handle_struct *handle,
 238                              files_struct *fsp,
 239                              int leasetype)
 240 {
 241         struct gpfs_config_data *config;
 242         int ret=0;
 243
 244         START_PROFILE(syscall_linux_setlease);
 245
 246         SMB_VFS_HANDLE_GET_DATA(handle, config,
 247                                 struct gpfs_config_data,
 248                                 return -1);
 249
 250         ret = linux_set_lease_sighandler(fsp_get_io_fd(fsp));
 251         if (ret == -1) {
 252                 goto failure;
 253         }
 254
 255         if (config->leases) {
 256                 int gpfs_lease_type = lease_type_to_gpfs(leasetype);
 257                 int saved_errno = 0;
 258
 259                 /*
 260                  * Ensure the lease owner is root to allow
 261                  * correct delivery of lease-break signals.
 262                  */
 263                 become_root();
 264                 ret = gpfswrap_set_lease(fsp_get_io_fd(fsp), gpfs_lease_type);
 265                 if (ret < 0) {
 266                         saved_errno = errno;
 267                 }
 268                 unbecome_root();
 269
 270                 if (saved_errno != 0) {
 271                         errno = saved_errno;
 272                 }
 273         }
 274
 275 failure:
 276         END_PROFILE(syscall_linux_setlease);
 277
 278         return ret;
 279 }
 280
 281 #else /* HAVE_KERNEL_OPLOCKS_LINUX */
 282
 283 static int vfs_gpfs_setlease(vfs_handle_struct *handle,
 284                                 files_struct *fsp,
 285                                 int leasetype)
 286 {
 287         return ENOSYS;
 288 }
 289 #endif /* HAVE_KERNEL_OPLOCKS_LINUX */
 290
 291 static NTSTATUS vfs_gpfs_get_real_filename_at(struct vfs_handle_struct *handle,
 292                                               struct files_struct *dirfsp,
 293                                               const char *name,
 294                                               TALLOC_CTX *mem_ctx,
 295                                               char **found_name)
 296 {
 297         int result;
 298         char *full_path = NULL;
 299         char *to_free = NULL;
 300         char real_pathname[PATH_MAX+1], tmpbuf[PATH_MAX];
 301         size_t full_path_len;
 302         int buflen;
 303         bool mangled;
 304         struct gpfs_config_data *config;
 305
 306         SMB_VFS_HANDLE_GET_DATA(handle, config,
 307                                 struct gpfs_config_data,
 308                                 return NT_STATUS_INTERNAL_ERROR);
 309
 310         if (!config->getrealfilename) {
 311                 return SMB_VFS_NEXT_GET_REAL_FILENAME_AT(
 312                         handle, dirfsp, name, mem_ctx, found_name);
 313         }
 314
 315         mangled = mangle_is_mangled(name, handle->conn->params);
 316         if (mangled) {
 317                 return SMB_VFS_NEXT_GET_REAL_FILENAME_AT(
 318                         handle, dirfsp, name, mem_ctx, found_name);
 319         }
 320
 321         full_path_len = full_path_tos(dirfsp->fsp_name->base_name, name,
 322                                       tmpbuf, sizeof(tmpbuf),
 323                                       &full_path, &to_free);
 324         if (full_path_len == -1) {
 325                 return NT_STATUS_NO_MEMORY;
 326         }
 327
 328         buflen = sizeof(real_pathname) - 1;
 329
 330         result = gpfswrap_get_realfilename_path(full_path, real_pathname,
 331                                                 &buflen);
 332
 333         TALLOC_FREE(to_free);
 334
 335         if ((result == -1) && (errno == ENOSYS)) {
 336                 return SMB_VFS_NEXT_GET_REAL_FILENAME_AT(
 337                         handle, dirfsp, name, mem_ctx, found_name);
 338         }
 339
 340         if (result == -1) {
 341                 DEBUG(10, ("smbd_gpfs_get_realfilename_path returned %s\n",
 342                            strerror(errno)));
 343                 return map_nt_error_from_unix(errno);
 344         }
 345
 346         /*
 347          * GPFS does not necessarily null-terminate the returned path
 348          * but instead returns the buffer length in buflen.
 349          */
 350
 351         if (buflen < sizeof(real_pathname)) {
 352                 real_pathname[buflen] = '\0';
 353         } else {
 354                 real_pathname[sizeof(real_pathname)-1] = '\0';
 355         }
 356
 357         DBG_DEBUG("%s/%s -> %s\n",
 358                   fsp_str_dbg(dirfsp),
 359                   name,
 360                   real_pathname);
 361
 362         name = strrchr_m(real_pathname, '/');
 363         if (name == NULL) {
 364                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 365         }
 366
 367         *found_name = talloc_strdup(mem_ctx, name+1);
 368         if (*found_name == NULL) {
 369                 return NT_STATUS_NO_MEMORY;
 370         }
 371
 372         return NT_STATUS_OK;
 373 }
 374
 375 static void sd2gpfs_control(uint16_t control, struct gpfs_acl *gacl)
 376 {
 377         unsigned int gpfs_aclflags = 0;
 378         control &= SEC_DESC_DACL_PROTECTED | SEC_DESC_SACL_PROTECTED |
 379                 SEC_DESC_DACL_AUTO_INHERITED | SEC_DESC_SACL_AUTO_INHERITED |
 380                 SEC_DESC_DACL_DEFAULTED | SEC_DESC_SACL_DEFAULTED |
 381                 SEC_DESC_DACL_PRESENT | SEC_DESC_SACL_PRESENT;
 382         gpfs_aclflags = control << 8;
 383         if (!(control & SEC_DESC_DACL_PRESENT))
 384                 gpfs_aclflags |= ACL4_FLAG_NULL_DACL;
 385         if (!(control & SEC_DESC_SACL_PRESENT))
 386                 gpfs_aclflags |= ACL4_FLAG_NULL_SACL;
 387         gacl->acl_level = GPFS_ACL_LEVEL_V4FLAGS;
 388         gacl->v4Level1.acl_flags = gpfs_aclflags;
 389 }
 390
 391 static uint16_t gpfs2sd_control(unsigned int gpfs_aclflags)
 392 {
 393         uint16_t control = gpfs_aclflags >> 8;
 394         control &= SEC_DESC_DACL_PROTECTED | SEC_DESC_SACL_PROTECTED |
 395                 SEC_DESC_DACL_AUTO_INHERITED | SEC_DESC_SACL_AUTO_INHERITED |
 396                 SEC_DESC_DACL_DEFAULTED | SEC_DESC_SACL_DEFAULTED |
 397                 SEC_DESC_DACL_PRESENT | SEC_DESC_SACL_PRESENT;
 398         control |= SEC_DESC_SELF_RELATIVE;
 399         return control;
 400 }
 401
 402 static void gpfs_dumpacl(int level, struct gpfs_acl *gacl)
 403 {
 404         gpfs_aclCount_t i;
 405         if (gacl==NULL)
 406         {
 407                 DEBUG(0, ("gpfs acl is NULL\n"));
 408                 return;
 409         }
 410
 411         DEBUG(level, ("len: %d, level: %d, version: %d, nace: %d, "
 412                       "control: %x\n",
 413                       gacl->acl_len, gacl->acl_level, gacl->acl_version,
 414                       gacl->acl_nace, gpfs_acl_flags(gacl)));
 415
 416         for(i=0; i<gacl->acl_nace; i++)
 417         {
 418                 struct gpfs_ace_v4 *gace = gpfs_ace_ptr(gacl, i);
 419                 DEBUG(level, ("\tace[%d]: type:%d, flags:0x%x, mask:0x%x, "
 420                               "iflags:0x%x, who:%u\n",
 421                               i, gace->aceType, gace->aceFlags, gace->aceMask,
 422                               gace->aceIFlags, gace->aceWho));
 423         }
 424 }
 425
 426 static int gpfs_getacl_with_capability(struct files_struct *fsp,
 427                                        int flags,
 428                                        void *buf)
 429 {
 430         int ret, saved_errno;
 431
 432         set_effective_capability(DAC_OVERRIDE_CAPABILITY);
 433
 434         ret = gpfswrap_fgetacl(fsp_get_pathref_fd(fsp), flags, buf);
 435         saved_errno = errno;
 436
 437         drop_effective_capability(DAC_OVERRIDE_CAPABILITY);
 438
 439         errno = saved_errno;
 440         return ret;
 441 }
 442
 443 /*
 444  * get the ACL from GPFS, allocated on the specified mem_ctx
 445  * internally retries when initial buffer was too small
 446  *
 447  * caller needs to cast result to either
 448  * raw = yes: struct gpfs_opaque_acl
 449  * raw = no: struct gpfs_acl
 450  *
 451  */
 452 static void *vfs_gpfs_getacl(TALLOC_CTX *mem_ctx,
 453                          struct files_struct *fsp,
 454                          const bool raw,
 455                          const gpfs_aclType_t type)
 456 {
 457         const char *fname = fsp->fsp_name->base_name;
 458         void *aclbuf;
 459         size_t size = 512;
 460         int ret, flags;
 461         unsigned int *len;
 462         size_t struct_size;
 463         bool use_capability = false;
 464
 465 again:
 466
 467         aclbuf = talloc_zero_size(mem_ctx, size);
 468         if (aclbuf == NULL) {
 469                 errno = ENOMEM;
 470                 return NULL;
 471         }
 472
 473         if (raw) {
 474                 struct gpfs_opaque_acl *buf = (struct gpfs_opaque_acl *) aclbuf;
 475                 buf->acl_type = type;
 476                 flags = GPFS_GETACL_NATIVE;
 477                 len = (unsigned int *) &(buf->acl_buffer_len);
 478                 struct_size = sizeof(struct gpfs_opaque_acl);
 479         } else {
 480                 struct gpfs_acl *buf = (struct gpfs_acl *) aclbuf;
 481                 buf->acl_type = type;
 482                 buf->acl_level = GPFS_ACL_LEVEL_V4FLAGS;
 483                 flags = GPFS_GETACL_STRUCT;
 484                 len = &(buf->acl_len);
 485                 /* reserve space for control flags in gpfs 3.5 and beyond */
 486                 struct_size = sizeof(struct gpfs_acl) + sizeof(unsigned int);
 487         }
 488
 489         /* set the length of the buffer as input value */
 490         *len = size;
 491
 492         if (use_capability) {
 493                 ret = gpfs_getacl_with_capability(fsp, flags, aclbuf);
 494         } else {
 495                 ret = gpfswrap_fgetacl(fsp_get_pathref_fd(fsp), flags, aclbuf);
 496                 if ((ret != 0) && (errno == EACCES)) {
 497                         DBG_DEBUG("Retry with DAC capability for %s\n", fname);
 498                         use_capability = true;
 499                         ret = gpfs_getacl_with_capability(fsp, flags, aclbuf);
 500                 }
 501         }
 502
 503         if ((ret != 0) && (errno == ENOSPC)) {
 504                 /*
 505                  * get the size needed to accommodate the complete buffer
 506                  *
 507                  * the value returned only applies to the ACL blob in the
 508                  * struct so make sure to also have headroom for the first
 509                  * struct members by adding room for the complete struct
 510                  * (might be a few bytes too much then)
 511                  */
 512                 size = *len + struct_size;
 513                 talloc_free(aclbuf);
 514                 DEBUG(10, ("Increasing ACL buffer size to %zu\n", size));
 515                 goto again;
 516         }
 517
 518         if (ret != 0) {
 519                 DEBUG(5, ("smbd_gpfs_getacl failed with %s\n",
 520                           strerror(errno)));
 521                 talloc_free(aclbuf);
 522                 return NULL;
 523         }
 524
 525         return aclbuf;
 526 }
 527
 528 /* Tries to get nfs4 acls and returns SMB ACL allocated.
 529  * On failure returns 1 if it got non-NFSv4 ACL to prompt
 530  * retry with POSIX ACL checks.
 531  * On failure returns -1 if there is system (GPFS) error, check errno.
 532  * Returns 0 on success
 533  */
 534 static int gpfs_get_nfs4_acl(TALLOC_CTX *mem_ctx,
 535                              struct files_struct *fsp,
 536                              struct SMB4ACL_T **ppacl)
 537 {
 538         const char *fname = fsp->fsp_name->base_name;
 539         gpfs_aclCount_t i;
 540         struct gpfs_acl *gacl = NULL;
 541         DEBUG(10, ("gpfs_get_nfs4_acl invoked for %s\n", fname));
 542
 543         /* Get the ACL */
 544         gacl = (struct gpfs_acl*) vfs_gpfs_getacl(talloc_tos(), fsp,
 545                                                   false, 0);
 546         if (gacl == NULL) {
 547                 DEBUG(9, ("gpfs_getacl failed for %s with %s\n",
 548                            fname, strerror(errno)));
 549                 if (errno == ENODATA) {
 550                         /*
 551                          * GPFS returns ENODATA for snapshot
 552                          * directories. Retry with POSIX ACLs check.
 553                          */
 554                         return 1;
 555                 }
 556
 557                 return -1;
 558         }
 559
 560         if (gacl->acl_type != GPFS_ACL_TYPE_NFS4) {
 561                 DEBUG(10, ("Got non-nfsv4 acl\n"));
 562                 /* Retry with POSIX ACLs check */
 563                 talloc_free(gacl);
 564                 return 1;
 565         }
 566
 567         *ppacl = smb_create_smb4acl(mem_ctx);
 568
 569         if (gacl->acl_level == GPFS_ACL_LEVEL_V4FLAGS) {
 570                 uint16_t control = gpfs2sd_control(gpfs_acl_flags(gacl));
 571                 smbacl4_set_controlflags(*ppacl, control);
 572         }
 573
 574         DEBUG(10, ("len: %d, level: %d, version: %d, nace: %d, control: %x\n",
 575                    gacl->acl_len, gacl->acl_level, gacl->acl_version,
 576                    gacl->acl_nace, gpfs_acl_flags(gacl)));
 577
 578         for (i=0; i<gacl->acl_nace; i++) {
 579                 struct gpfs_ace_v4 *gace = gpfs_ace_ptr(gacl, i);
 580                 SMB_ACE4PROP_T smbace = { 0 };
 581                 DEBUG(10, ("type: %d, iflags: %x, flags: %x, mask: %x, "
 582                            "who: %d\n", gace->aceType, gace->aceIFlags,
 583                            gace->aceFlags, gace->aceMask, gace->aceWho));
 584
 585                 if (gace->aceIFlags & ACE4_IFLAG_SPECIAL_ID) {
 586                         smbace.flags |= SMB_ACE4_ID_SPECIAL;
 587                         switch (gace->aceWho) {
 588                         case ACE4_SPECIAL_OWNER:
 589                                 smbace.who.special_id = SMB_ACE4_WHO_OWNER;
 590                                 break;
 591                         case ACE4_SPECIAL_GROUP:
 592                                 smbace.who.special_id = SMB_ACE4_WHO_GROUP;
 593                                 break;
 594                         case ACE4_SPECIAL_EVERYONE:
 595                                 smbace.who.special_id = SMB_ACE4_WHO_EVERYONE;
 596                                 break;
 597                         default:
 598                                 DEBUG(8, ("invalid special gpfs id %d "
 599                                           "ignored\n", gace->aceWho));
 600                                 continue; /* don't add it */
 601                         }
 602                 } else {
 603                         if (gace->aceFlags & ACE4_FLAG_GROUP_ID)
 604                                 smbace.who.gid = gace->aceWho;
 605                         else
 606                                 smbace.who.uid = gace->aceWho;
 607                 }
 608
 609                 /* remove redundant deny entries */
 610                 if (i > 0 && gace->aceType == SMB_ACE4_ACCESS_DENIED_ACE_TYPE) {
 611                         struct gpfs_ace_v4 *prev = gpfs_ace_ptr(gacl, i - 1);
 612                         if (prev->aceType == SMB_ACE4_ACCESS_ALLOWED_ACE_TYPE &&
 613                             prev->aceFlags == gace->aceFlags &&
 614                             prev->aceIFlags == gace->aceIFlags &&
 615                             (gace->aceMask & prev->aceMask) == 0 &&
 616                             gace->aceWho == prev->aceWho) {
 617                                 /* it's redundant - skip it */
 618                                 continue;
 619                         }
 620                 }
 621
 622                 smbace.aceType = gace->aceType;
 623                 smbace.aceFlags = gace->aceFlags;
 624                 smbace.aceMask = gace->aceMask;
 625                 smb_add_ace4(*ppacl, &smbace);
 626         }
 627
 628         talloc_free(gacl);
 629
 630         return 0;
 631 }
 632
 633 static NTSTATUS gpfsacl_fget_nt_acl(vfs_handle_struct *handle,
 634         files_struct *fsp, uint32_t security_info,
 635         TALLOC_CTX *mem_ctx,
 636         struct security_descriptor **ppdesc)
 637 {
 638         struct SMB4ACL_T *pacl = NULL;
 639         int     result;
 640         struct gpfs_config_data *config;
 641         TALLOC_CTX *frame = talloc_stackframe();
 642         NTSTATUS status;
 643
 644         *ppdesc = NULL;
 645
 646         SMB_VFS_HANDLE_GET_DATA(handle, config,
 647                                 struct gpfs_config_data,
 648                                 return NT_STATUS_INTERNAL_ERROR);
 649
 650         if (!config->acl) {
 651                 status = SMB_VFS_NEXT_FGET_NT_ACL(handle, fsp, security_info,
 652                                                   mem_ctx, ppdesc);
 653                 TALLOC_FREE(frame);
 654                 return status;
 655         }
 656
 657         result = gpfs_get_nfs4_acl(frame, fsp, &pacl);
 658
 659         if (result == 0) {
 660                 status = smb_fget_nt_acl_nfs4(fsp, &config->nfs4_params,
 661                                               security_info,
 662                                               mem_ctx, ppdesc, pacl);
 663                 TALLOC_FREE(frame);
 664                 return status;
 665         }
 666
 667         if (result > 0) {
 668                 DEBUG(10, ("retrying with posix acl...\n"));
 669                 status = posix_fget_nt_acl(fsp, security_info,
 670                                            mem_ctx, ppdesc);
 671                 TALLOC_FREE(frame);
 672                 return status;
 673         }
 674
 675         TALLOC_FREE(frame);
 676
 677         /* GPFS ACL was not read, something wrong happened, error code is set in errno */
 678         return map_nt_error_from_unix(errno);
 679 }
 680
 681 static bool vfs_gpfs_nfs4_ace_to_gpfs_ace(SMB_ACE4PROP_T *nfs4_ace,
 682                                           struct gpfs_ace_v4 *gace,
 683                                           uid_t owner_uid)
 684 {
 685         gace->aceType = nfs4_ace->aceType;
 686         gace->aceFlags = nfs4_ace->aceFlags;
 687         gace->aceMask = nfs4_ace->aceMask;
 688
 689         if (nfs4_ace->flags & SMB_ACE4_ID_SPECIAL) {
 690                 switch(nfs4_ace->who.special_id) {
 691                 case SMB_ACE4_WHO_EVERYONE:
 692                         gace->aceIFlags = ACE4_IFLAG_SPECIAL_ID;
 693                         gace->aceWho = ACE4_SPECIAL_EVERYONE;
 694                         break;
 695                 case SMB_ACE4_WHO_OWNER:
 696                         /*
 697                          * With GPFS it is not possible to deny ACL or
 698                          * attribute access to the owner. Setting an
 699                          * ACL with such an entry is not possible.
 700                          * Denying ACL or attribute access for the
 701                          * owner through a named ACL entry can be
 702                          * stored in an ACL, it is just not effective.
 703                          *
 704                          * Map this case to a named entry to allow at
 705                          * least setting this ACL, which will be
 706                          * enforced by the smbd permission check. Do
 707                          * not do this for an inheriting OWNER entry,
 708                          * as this represents a CREATOR OWNER ACE. The
 709                          * remaining limitation is that CREATOR OWNER
 710                          * cannot deny ACL or attribute access.
 711                          */
 712                         if (!nfs_ace_is_inherit(nfs4_ace) &&
 713                             nfs4_ace->aceType ==
 714                                         SMB_ACE4_ACCESS_DENIED_ACE_TYPE &&
 715                             nfs4_ace->aceMask & (SMB_ACE4_READ_ATTRIBUTES|
 716                                                  SMB_ACE4_WRITE_ATTRIBUTES|
 717                                                  SMB_ACE4_READ_ACL|
 718                                                  SMB_ACE4_WRITE_ACL)) {
 719                                 gace->aceIFlags = 0;
 720                                 gace->aceWho = owner_uid;
 721                         } else {
 722                                 gace->aceIFlags = ACE4_IFLAG_SPECIAL_ID;
 723                                 gace->aceWho = ACE4_SPECIAL_OWNER;
 724                         }
 725                         break;
 726                 case SMB_ACE4_WHO_GROUP:
 727                         gace->aceIFlags = ACE4_IFLAG_SPECIAL_ID;
 728                         gace->aceWho = ACE4_SPECIAL_GROUP;
 729                         break;
 730                 default:
 731                         DBG_WARNING("Unsupported special_id %d\n",
 732                                     nfs4_ace->who.special_id);
 733                         return false;
 734                 }
 735
 736                 return true;
 737         }
 738
 739         gace->aceIFlags = 0;
 740         gace->aceWho = (nfs4_ace->aceFlags & SMB_ACE4_IDENTIFIER_GROUP) ?
 741                 nfs4_ace->who.gid : nfs4_ace->who.uid;
 742
 743         return true;
 744 }
 745
 746 static struct gpfs_acl *vfs_gpfs_smbacl2gpfsacl(TALLOC_CTX *mem_ctx,
 747                                                 files_struct *fsp,
 748                                                 struct SMB4ACL_T *smbacl,
 749                                                 bool controlflags)
 750 {
 751         struct gpfs_acl *gacl;
 752         gpfs_aclLen_t gacl_len;
 753         struct SMB4ACE_T *smbace;
 754
 755         gacl_len = offsetof(gpfs_acl_t, ace_v4) + sizeof(unsigned int)
 756                 + smb_get_naces(smbacl) * sizeof(gpfs_ace_v4_t);
 757
 758         gacl = (struct gpfs_acl *)TALLOC_SIZE(mem_ctx, gacl_len);
 759         if (gacl == NULL) {
 760                 DEBUG(0, ("talloc failed\n"));
 761                 errno = ENOMEM;
 762                 return NULL;
 763         }
 764
 765         gacl->acl_level = GPFS_ACL_LEVEL_BASE;
 766         gacl->acl_version = GPFS_ACL_VERSION_NFS4;
 767         gacl->acl_type = GPFS_ACL_TYPE_NFS4;
 768         gacl->acl_nace = 0; /* change later... */
 769
 770         if (controlflags) {
 771                 gacl->acl_level = GPFS_ACL_LEVEL_V4FLAGS;
 772                 sd2gpfs_control(smbacl4_get_controlflags(smbacl), gacl);
 773         }
 774
 775         for (smbace=smb_first_ace4(smbacl); smbace!=NULL; smbace = smb_next_ace4(smbace)) {
 776                 struct gpfs_ace_v4 *gace = gpfs_ace_ptr(gacl, gacl->acl_nace);
 777                 SMB_ACE4PROP_T  *aceprop = smb_get_ace4(smbace);
 778                 bool add_ace;
 779
 780                 add_ace = vfs_gpfs_nfs4_ace_to_gpfs_ace(aceprop, gace,
 781                                                         fsp->fsp_name->st.st_ex_uid);
 782                 if (!add_ace) {
 783                         continue;
 784                 }
 785
 786                 gacl->acl_nace++;
 787         }
 788         gacl->acl_len = (char *)gpfs_ace_ptr(gacl, gacl->acl_nace)
 789                 - (char *)gacl;
 790         return gacl;
 791 }
 792
 793 static bool gpfsacl_process_smbacl(vfs_handle_struct *handle,
 794                                    files_struct *fsp,
 795                                    struct SMB4ACL_T *smbacl)
 796 {
 797         int ret;
 798         struct gpfs_acl *gacl;
 799         TALLOC_CTX *mem_ctx = talloc_tos();
 800
 801         gacl = vfs_gpfs_smbacl2gpfsacl(mem_ctx, fsp, smbacl, true);
 802         if (gacl == NULL) { /* out of memory */
 803                 return False;
 804         }
 805         ret = gpfswrap_putacl(fsp->fsp_name->base_name,
 806                               GPFS_PUTACL_STRUCT | GPFS_ACL_SAMBA, gacl);
 807
 808         if ((ret != 0) && (errno == EINVAL)) {
 809                 DEBUG(10, ("Retry without nfs41 control flags\n"));
 810                 talloc_free(gacl);
 811                 gacl = vfs_gpfs_smbacl2gpfsacl(mem_ctx, fsp, smbacl, false);
 812                 if (gacl == NULL) { /* out of memory */
 813                         return False;
 814                 }
 815                 ret = gpfswrap_putacl(fsp->fsp_name->base_name,
 816                                       GPFS_PUTACL_STRUCT | GPFS_ACL_SAMBA,
 817                                       gacl);
 818         }
 819
 820         if (ret != 0) {
 821                 DEBUG(8, ("gpfs_putacl failed with %s\n", strerror(errno)));
 822                 gpfs_dumpacl(8, gacl);
 823                 return False;
 824         }
 825
 826         DEBUG(10, ("gpfs_putacl succeeded\n"));
 827         return True;
 828 }
 829
 830 static NTSTATUS gpfsacl_set_nt_acl_internal(vfs_handle_struct *handle, files_struct *fsp, uint32_t security_info_sent, const struct security_descriptor *psd)
 831 {
 832         struct gpfs_acl *acl;
 833         NTSTATUS result = NT_STATUS_ACCESS_DENIED;
 834
 835         acl = (struct gpfs_acl*) vfs_gpfs_getacl(talloc_tos(),
 836                                                  fsp,
 837                                                  false, 0);
 838         if (acl == NULL) {
 839                 return map_nt_error_from_unix(errno);
 840         }
 841
 842         if (acl->acl_version == GPFS_ACL_VERSION_NFS4) {
 843                 struct gpfs_config_data *config;
 844
 845                 SMB_VFS_HANDLE_GET_DATA(handle, config,
 846                                         struct gpfs_config_data,
 847                                         return NT_STATUS_INTERNAL_ERROR);
 848
 849                 result = smb_set_nt_acl_nfs4(handle,
 850                         fsp, &config->nfs4_params, security_info_sent, psd,
 851                         gpfsacl_process_smbacl);
 852         } else { /* assume POSIX ACL - by default... */
 853                 result = set_nt_acl(fsp, security_info_sent, psd);
 854         }
 855
 856         talloc_free(acl);
 857         return result;
 858 }
 859
 860 static NTSTATUS gpfsacl_fset_nt_acl(vfs_handle_struct *handle, files_struct *fsp, uint32_t security_info_sent, const struct security_descriptor *psd)
 861 {
 862         struct gpfs_config_data *config;
 863
 864         SMB_VFS_HANDLE_GET_DATA(handle, config,
 865                                 struct gpfs_config_data,
 866                                 return NT_STATUS_INTERNAL_ERROR);
 867
 868         if (!config->acl) {
 869                 return SMB_VFS_NEXT_FSET_NT_ACL(handle, fsp, security_info_sent, psd);
 870         }
 871
 872         return gpfsacl_set_nt_acl_internal(handle, fsp, security_info_sent, psd);
 873 }
 874
 875 static SMB_ACL_T gpfs2smb_acl(const struct gpfs_acl *pacl, TALLOC_CTX *mem_ctx)
 876 {
 877         SMB_ACL_T result;
 878         gpfs_aclCount_t i;
 879
 880         result = sys_acl_init(mem_ctx);
 881         if (result == NULL) {
 882                 errno = ENOMEM;
 883                 return NULL;
 884         }
 885
 886         result->count = pacl->acl_nace;
 887         result->acl = talloc_realloc(result, result->acl, struct smb_acl_entry,
 888                                      result->count);
 889         if (result->acl == NULL) {
 890                 TALLOC_FREE(result);
 891                 errno = ENOMEM;
 892                 return NULL;
 893         }
 894
 895         for (i=0; i<pacl->acl_nace; i++) {
 896                 struct smb_acl_entry *ace = &result->acl[i];
 897                 const struct gpfs_ace_v1 *g_ace = &pacl->ace_v1[i];
 898
 899                 DEBUG(10, ("Converting type %d id %lu perm %x\n",
 900                            (int)g_ace->ace_type, (unsigned long)g_ace->ace_who,
 901                            (int)g_ace->ace_perm));
 902
 903                 switch (g_ace->ace_type) {
 904                 case GPFS_ACL_USER:
 905                         ace->a_type = SMB_ACL_USER;
 906                         ace->info.user.uid = (uid_t)g_ace->ace_who;
 907                         break;
 908                 case GPFS_ACL_USER_OBJ:
 909                         ace->a_type = SMB_ACL_USER_OBJ;
 910                         break;
 911                 case GPFS_ACL_GROUP:
 912                         ace->a_type = SMB_ACL_GROUP;
 913                         ace->info.group.gid = (gid_t)g_ace->ace_who;
 914                         break;
 915                 case GPFS_ACL_GROUP_OBJ:
 916                         ace->a_type = SMB_ACL_GROUP_OBJ;
 917                         break;
 918                 case GPFS_ACL_OTHER:
 919                         ace->a_type = SMB_ACL_OTHER;
 920                         break;
 921                 case GPFS_ACL_MASK:
 922                         ace->a_type = SMB_ACL_MASK;
 923                         break;
 924                 default:
 925                         DEBUG(10, ("Got invalid ace_type: %d\n",
 926                                    g_ace->ace_type));
 927                         TALLOC_FREE(result);
 928                         errno = EINVAL;
 929                         return NULL;
 930                 }
 931
 932                 ace->a_perm = 0;
 933                 ace->a_perm |= (g_ace->ace_perm & ACL_PERM_READ) ?
 934                         SMB_ACL_READ : 0;
 935                 ace->a_perm |= (g_ace->ace_perm & ACL_PERM_WRITE) ?
 936                         SMB_ACL_WRITE : 0;
 937                 ace->a_perm |= (g_ace->ace_perm & ACL_PERM_EXECUTE) ?
 938                         SMB_ACL_EXECUTE : 0;
 939
 940                 DEBUGADD(10, ("Converted to %d perm %x\n",
 941                               ace->a_type, ace->a_perm));
 942         }
 943
 944         return result;
 945 }
 946
 947 static SMB_ACL_T gpfsacl_get_posix_acl(struct files_struct *fsp,
 948                                        gpfs_aclType_t type,
 949                                        TALLOC_CTX *mem_ctx)
 950 {
 951         struct gpfs_acl *pacl;
 952         SMB_ACL_T result = NULL;
 953
 954         pacl = vfs_gpfs_getacl(talloc_tos(), fsp, false, type);
 955
 956         if (pacl == NULL) {
 957                 DBG_DEBUG("vfs_gpfs_getacl failed for %s with %s\n",
 958                            fsp_str_dbg(fsp), strerror(errno));
 959                 if (errno == 0) {
 960                         errno = EINVAL;
 961                 }
 962                 goto done;
 963         }
 964
 965         if (pacl->acl_version != GPFS_ACL_VERSION_POSIX) {
 966                 DEBUG(10, ("Got acl version %d, expected %d\n",
 967                            pacl->acl_version, GPFS_ACL_VERSION_POSIX));
 968                 errno = EINVAL;
 969                 goto done;
 970         }
 971
 972         DEBUG(10, ("len: %d, level: %d, version: %d, nace: %d\n",
 973                    pacl->acl_len, pacl->acl_level, pacl->acl_version,
 974                    pacl->acl_nace));
 975
 976         result = gpfs2smb_acl(pacl, mem_ctx);
 977         if (result != NULL) {
 978                 errno = 0;
 979         }
 980
 981  done:
 982
 983         if (pacl != NULL) {
 984                 talloc_free(pacl);
 985         }
 986         if (errno != 0) {
 987                 TALLOC_FREE(result);
 988         }
 989         return result;
 990 }
 991
 992 static SMB_ACL_T gpfsacl_sys_acl_get_fd(vfs_handle_struct *handle,
 993                                         files_struct *fsp,
 994                                         SMB_ACL_TYPE_T type,
 995                                         TALLOC_CTX *mem_ctx)
 996 {
 997         gpfs_aclType_t gpfs_type;
 998         struct gpfs_config_data *config;
 999
1000         SMB_VFS_HANDLE_GET_DATA(handle, config,
1001                                 struct gpfs_config_data,
1002                                 return NULL);
1003
1004         if (!config->acl) {
1005                 return SMB_VFS_NEXT_SYS_ACL_GET_FD(handle, fsp, type, mem_ctx);
1006         }
1007
1008         switch(type) {
1009         case SMB_ACL_TYPE_ACCESS:
1010                 gpfs_type = GPFS_ACL_TYPE_ACCESS;
1011                 break;
1012         case SMB_ACL_TYPE_DEFAULT:
1013                 gpfs_type = GPFS_ACL_TYPE_DEFAULT;
1014                 break;
1015         default:
1016                 DEBUG(0, ("Got invalid type: %d\n", type));
1017                 smb_panic("exiting");
1018         }
1019         return gpfsacl_get_posix_acl(fsp, gpfs_type, mem_ctx);
1020 }
1021
1022 static int gpfsacl_sys_acl_blob_get_fd(vfs_handle_struct *handle,
1023                                       files_struct *fsp,
1024                                       TALLOC_CTX *mem_ctx,
1025                                       char **blob_description,
1026                                       DATA_BLOB *blob)
1027 {
1028         struct gpfs_config_data *config;
1029         struct gpfs_opaque_acl *acl = NULL;
1030         DATA_BLOB aclblob;
1031         int result;
1032
1033         SMB_VFS_HANDLE_GET_DATA(handle, config,
1034                                 struct gpfs_config_data,
1035                                 return -1);
1036
1037         if (!config->acl) {
1038                 return SMB_VFS_NEXT_SYS_ACL_BLOB_GET_FD(handle, fsp, mem_ctx,
1039                                                         blob_description, blob);
1040         }
1041
1042         errno = 0;
1043         acl = (struct gpfs_opaque_acl *) vfs_gpfs_getacl(mem_ctx,
1044                                                 fsp,
1045                                                 true,
1046                                                 GPFS_ACL_TYPE_NFS4);
1047
1048         if (errno) {
1049                 DEBUG(5, ("vfs_gpfs_getacl finished with errno %d: %s\n",
1050                                         errno, strerror(errno)));
1051
1052                 /* EINVAL means POSIX ACL, bail out on other cases */
1053                 if (errno != EINVAL) {
1054                         return -1;
1055                 }
1056         }
1057
1058         if (acl != NULL) {
1059                 /*
1060                  * file has NFSv4 ACL
1061                  *
1062                  * we only need the actual ACL blob here
1063                  * acl_version will always be NFS4 because we asked
1064                  * for NFS4
1065                  * acl_type is only used for POSIX ACLs
1066                  */
1067                 aclblob.data = (uint8_t*) acl->acl_var_data;
1068                 aclblob.length = acl->acl_buffer_len;
1069
1070                 *blob_description = talloc_strdup(mem_ctx, "gpfs_nfs4_acl");
1071                 if (!*blob_description) {
1072                         talloc_free(acl);
1073                         errno = ENOMEM;
1074                         return -1;
1075                 }
1076
1077                 result = non_posix_sys_acl_blob_get_fd_helper(handle, fsp,
1078                                                               aclblob, mem_ctx,
1079                                                               blob);
1080
1081                 talloc_free(acl);
1082                 return result;
1083         }
1084
1085         /* fall back to POSIX ACL */
1086         return posix_sys_acl_blob_get_fd(handle, fsp, mem_ctx,
1087                                          blob_description, blob);
1088 }
1089
1090 static struct gpfs_acl *smb2gpfs_acl(const SMB_ACL_T pacl,
1091                                      SMB_ACL_TYPE_T type)
1092 {
1093         gpfs_aclLen_t len;
1094         struct gpfs_acl *result;
1095         int i;
1096
1097         DEBUG(10, ("smb2gpfs_acl: Got ACL with %d entries\n", pacl->count));
1098
1099         len = offsetof(gpfs_acl_t, ace_v1) + (pacl->count) *
1100                 sizeof(gpfs_ace_v1_t);
1101
1102         result = (struct gpfs_acl *)SMB_MALLOC(len);
1103         if (result == NULL) {
1104                 errno = ENOMEM;
1105                 return result;
1106         }
1107
1108         result->acl_len = len;
1109         result->acl_level = 0;
1110         result->acl_version = GPFS_ACL_VERSION_POSIX;
1111         result->acl_type = (type == SMB_ACL_TYPE_DEFAULT) ?
1112                 GPFS_ACL_TYPE_DEFAULT : GPFS_ACL_TYPE_ACCESS;
1113         result->acl_nace = pacl->count;
1114
1115         for (i=0; i<pacl->count; i++) {
1116                 const struct smb_acl_entry *ace = &pacl->acl[i];
1117                 struct gpfs_ace_v1 *g_ace = &result->ace_v1[i];
1118
1119                 DEBUG(10, ("Converting type %d perm %x\n",
1120                            (int)ace->a_type, (int)ace->a_perm));
1121
1122                 g_ace->ace_perm = 0;
1123
1124                 switch(ace->a_type) {
1125                 case SMB_ACL_USER:
1126                         g_ace->ace_type = GPFS_ACL_USER;
1127                         g_ace->ace_who = (gpfs_uid_t)ace->info.user.uid;
1128                         break;
1129                 case SMB_ACL_USER_OBJ:
1130                         g_ace->ace_type = GPFS_ACL_USER_OBJ;
1131                         g_ace->ace_perm |= ACL_PERM_CONTROL;
1132                         g_ace->ace_who = 0;
1133                         break;
1134                 case SMB_ACL_GROUP:
1135                         g_ace->ace_type = GPFS_ACL_GROUP;
1136                         g_ace->ace_who = (gpfs_uid_t)ace->info.group.gid;
1137                         break;
1138                 case SMB_ACL_GROUP_OBJ:
1139                         g_ace->ace_type = GPFS_ACL_GROUP_OBJ;
1140                         g_ace->ace_who = 0;
1141                         break;
1142                 case SMB_ACL_MASK:
1143                         g_ace->ace_type = GPFS_ACL_MASK;
1144                         g_ace->ace_perm = 0x8f;
1145                         g_ace->ace_who = 0;
1146                         break;
1147                 case SMB_ACL_OTHER:
1148                         g_ace->ace_type = GPFS_ACL_OTHER;
1149                         g_ace->ace_who = 0;
1150                         break;
1151                 default:
1152                         DEBUG(10, ("Got invalid ace_type: %d\n", ace->a_type));
1153                         errno = EINVAL;
1154                         SAFE_FREE(result);
1155                         return NULL;
1156                 }
1157
1158                 g_ace->ace_perm |= (ace->a_perm & SMB_ACL_READ) ?
1159                         ACL_PERM_READ : 0;
1160                 g_ace->ace_perm |= (ace->a_perm & SMB_ACL_WRITE) ?
1161                         ACL_PERM_WRITE : 0;
1162                 g_ace->ace_perm |= (ace->a_perm & SMB_ACL_EXECUTE) ?
1163                         ACL_PERM_EXECUTE : 0;
1164
1165                 DEBUGADD(10, ("Converted to %d id %d perm %x\n",
1166                               g_ace->ace_type, g_ace->ace_who, g_ace->ace_perm));
1167         }
1168
1169         return result;
1170 }
1171
1172 static int gpfsacl_sys_acl_set_fd(vfs_handle_struct *handle,
1173                                   files_struct *fsp,
1174                                   SMB_ACL_TYPE_T type,
1175                                   SMB_ACL_T theacl)
1176 {
1177         struct gpfs_config_data *config;
1178         struct gpfs_acl *gpfs_acl = NULL;
1179         int result;
1180
1181         SMB_VFS_HANDLE_GET_DATA(handle, config,
1182                                 struct gpfs_config_data,
1183                                 return -1);
1184
1185         if (!config->acl) {
1186                 return SMB_VFS_NEXT_SYS_ACL_SET_FD(handle, fsp, type, theacl);
1187         }
1188
1189         gpfs_acl = smb2gpfs_acl(theacl, type);
1190         if (gpfs_acl == NULL) {
1191                 return -1;
1192         }
1193
1194         /*
1195          * This is no longer a handle based call.
1196          */
1197         result = gpfswrap_putacl(fsp->fsp_name->base_name,
1198                                  GPFS_PUTACL_STRUCT|GPFS_ACL_SAMBA,
1199                                  gpfs_acl);
1200         SAFE_FREE(gpfs_acl);
1201         return result;
1202 }
1203
1204 static int gpfsacl_sys_acl_delete_def_fd(vfs_handle_struct *handle,
1205                                 files_struct *fsp)
1206 {
1207         struct gpfs_config_data *config;
1208
1209         SMB_VFS_HANDLE_GET_DATA(handle, config,
1210                                 struct gpfs_config_data,
1211                                 return -1);
1212
1213         if (!config->acl) {
1214                 return SMB_VFS_NEXT_SYS_ACL_DELETE_DEF_FD(handle, fsp);
1215         }
1216
1217         errno = ENOTSUP;
1218         return -1;
1219 }
1220
1221
1222 /*
1223  * Assumed: mode bits are shiftable and standard
1224  * Output: the new aceMask field for an smb nfs4 ace
1225  */
1226 static uint32_t gpfsacl_mask_filter(uint32_t aceType, uint32_t aceMask, uint32_t rwx)
1227 {
1228         const uint32_t posix_nfs4map[3] = {
1229                 SMB_ACE4_EXECUTE, /* execute */
1230                 SMB_ACE4_WRITE_DATA | SMB_ACE4_APPEND_DATA, /* write; GPFS specific */
1231                 SMB_ACE4_READ_DATA /* read */
1232         };
1233         int     i;
1234         uint32_t        posix_mask = 0x01;
1235         uint32_t        posix_bit;
1236         uint32_t        nfs4_bits;
1237
1238         for(i=0; i<3; i++) {
1239                 nfs4_bits = posix_nfs4map[i];
1240                 posix_bit = rwx & posix_mask;
1241
1242                 if (aceType==SMB_ACE4_ACCESS_ALLOWED_ACE_TYPE) {
1243                         if (posix_bit)
1244                                 aceMask |= nfs4_bits;
1245                         else
1246                                 aceMask &= ~nfs4_bits;
1247                 } else {
1248                         /* add deny bits when suitable */
1249                         if (!posix_bit)
1250                                 aceMask |= nfs4_bits;
1251                         else
1252                                 aceMask &= ~nfs4_bits;
1253                 } /* other ace types are unexpected */
1254
1255                 posix_mask <<= 1;
1256         }
1257
1258         return aceMask;
1259 }
1260
1261 static int gpfsacl_emu_chmod(vfs_handle_struct *handle,
1262                              struct files_struct *fsp,
1263                              mode_t mode)
1264 {
1265         struct smb_filename *fname = fsp->fsp_name;
1266         char *path = fsp->fsp_name->base_name;
1267         struct SMB4ACL_T *pacl = NULL;
1268         int     result;
1269         bool    haveAllowEntry[SMB_ACE4_WHO_EVERYONE + 1] = {False, False, False, False};
1270         int     i;
1271         files_struct fake_fsp = { 0 }; /* TODO: rationalize parametrization */
1272         struct SMB4ACE_T *smbace;
1273         TALLOC_CTX *frame = talloc_stackframe();
1274
1275         DEBUG(10, ("gpfsacl_emu_chmod invoked for %s mode %o\n", path, mode));
1276
1277         result = gpfs_get_nfs4_acl(frame, fsp, &pacl);
1278         if (result) {
1279                 TALLOC_FREE(frame);
1280                 return result;
1281         }
1282
1283         if (mode & ~(S_IRWXU | S_IRWXG | S_IRWXO)) {
1284                 DEBUG(2, ("WARNING: cutting extra mode bits %o on %s\n", mode, path));
1285         }
1286
1287         for (smbace=smb_first_ace4(pacl); smbace!=NULL; smbace = smb_next_ace4(smbace)) {
1288                 SMB_ACE4PROP_T  *ace = smb_get_ace4(smbace);
1289                 uint32_t        specid = ace->who.special_id;
1290
1291                 if (ace->flags&SMB_ACE4_ID_SPECIAL &&
1292                     ace->aceType<=SMB_ACE4_ACCESS_DENIED_ACE_TYPE &&
1293                     specid <= SMB_ACE4_WHO_EVERYONE) {
1294
1295                         uint32_t newMask;
1296
1297                         if (ace->aceType==SMB_ACE4_ACCESS_ALLOWED_ACE_TYPE)
1298                                 haveAllowEntry[specid] = True;
1299
1300                         /* mode >> 6 for @owner, mode >> 3 for @group,
1301                          * mode >> 0 for @everyone */
1302                         newMask = gpfsacl_mask_filter(ace->aceType, ace->aceMask,
1303                                                       mode >> ((SMB_ACE4_WHO_EVERYONE - specid) * 3));
1304                         if (ace->aceMask!=newMask) {
1305                                 DEBUG(10, ("ace changed for %s (%o -> %o) id=%d\n",
1306                                            path, ace->aceMask, newMask, specid));
1307                         }
1308                         ace->aceMask = newMask;
1309                 }
1310         }
1311
1312         /* make sure we have at least ALLOW entries
1313          * for all the 3 special ids (@EVERYONE, @OWNER, @GROUP)
1314          * - if necessary
1315          */
1316         for(i = SMB_ACE4_WHO_OWNER; i<=SMB_ACE4_WHO_EVERYONE; i++) {
1317                 SMB_ACE4PROP_T ace = { 0 };
1318
1319                 if (haveAllowEntry[i]==True)
1320                         continue;
1321
1322                 ace.aceType = SMB_ACE4_ACCESS_ALLOWED_ACE_TYPE;
1323                 ace.flags |= SMB_ACE4_ID_SPECIAL;
1324                 ace.who.special_id = i;
1325
1326                 if (i==SMB_ACE4_WHO_GROUP) /* not sure it's necessary... */
1327                         ace.aceFlags |= SMB_ACE4_IDENTIFIER_GROUP;
1328
1329                 ace.aceMask = gpfsacl_mask_filter(ace.aceType, ace.aceMask,
1330                                                   mode >> ((SMB_ACE4_WHO_EVERYONE - i) * 3));
1331
1332                 /* don't add unnecessary aces */
1333                 if (!ace.aceMask)
1334                         continue;
1335
1336                 /* we add it to the END - as windows expects allow aces */
1337                 smb_add_ace4(pacl, &ace);
1338                 DEBUG(10, ("Added ALLOW ace for %s, mode=%o, id=%d, aceMask=%x\n",
1339                            path, mode, i, ace.aceMask));
1340         }
1341
1342         /* don't add complementary DENY ACEs here */
1343         fake_fsp.fsp_name = synthetic_smb_fname(frame,
1344                                                 path,
1345                                                 NULL,
1346                                                 NULL,
1347                                                 fname->twrp,
1348                                                 0);
1349         if (fake_fsp.fsp_name == NULL) {
1350                 errno = ENOMEM;
1351                 TALLOC_FREE(frame);
1352                 return -1;
1353         }
1354         /* put the acl */
1355         if (gpfsacl_process_smbacl(handle, &fake_fsp, pacl) == False) {
1356                 TALLOC_FREE(frame);
1357                 return -1;
1358         }
1359
1360         TALLOC_FREE(frame);
1361         return 0; /* ok for [f]chmod */
1362 }
1363
1364 static int vfs_gpfs_fchmod(vfs_handle_struct *handle, files_struct *fsp, mode_t mode)
1365 {
1366         SMB_STRUCT_STAT st;
1367         int rc;
1368
1369         rc = SMB_VFS_NEXT_FSTAT(handle, fsp, &st);
1370         if (rc != 0) {
1371                 return -1;
1372         }
1373
1374         /* avoid chmod() if possible, to preserve acls */
1375         if ((st.st_ex_mode & ~S_IFMT) == mode) {
1376                 return 0;
1377         }
1378
1379         rc = gpfsacl_emu_chmod(handle, fsp, mode);
1380         if (rc == 1) {
1381                 return SMB_VFS_NEXT_FCHMOD(handle, fsp, mode);
1382         }
1383         return rc;
1384 }
1385
1386 static uint32_t vfs_gpfs_winattrs_to_dosmode(unsigned int winattrs)
1387 {
1388         uint32_t dosmode = 0;
1389
1390         if (winattrs & GPFS_WINATTR_ARCHIVE){
1391                 dosmode |= FILE_ATTRIBUTE_ARCHIVE;
1392         }
1393         if (winattrs & GPFS_WINATTR_HIDDEN){
1394                 dosmode |= FILE_ATTRIBUTE_HIDDEN;
1395         }
1396         if (winattrs & GPFS_WINATTR_SYSTEM){
1397                 dosmode |= FILE_ATTRIBUTE_SYSTEM;
1398         }
1399         if (winattrs & GPFS_WINATTR_READONLY){
1400                 dosmode |= FILE_ATTRIBUTE_READONLY;
1401         }
1402         if (winattrs & GPFS_WINATTR_SPARSE_FILE) {
1403                 dosmode |= FILE_ATTRIBUTE_SPARSE;
1404         }
1405         if (winattrs & GPFS_WINATTR_OFFLINE) {
1406                 dosmode |= FILE_ATTRIBUTE_OFFLINE;
1407         }
1408
1409         return dosmode;
1410 }
1411
1412 static unsigned int vfs_gpfs_dosmode_to_winattrs(uint32_t dosmode)
1413 {
1414         unsigned int winattrs = 0;
1415
1416         if (dosmode & FILE_ATTRIBUTE_ARCHIVE){
1417                 winattrs |= GPFS_WINATTR_ARCHIVE;
1418         }
1419         if (dosmode & FILE_ATTRIBUTE_HIDDEN){
1420                 winattrs |= GPFS_WINATTR_HIDDEN;
1421         }
1422         if (dosmode & FILE_ATTRIBUTE_SYSTEM){
1423                 winattrs |= GPFS_WINATTR_SYSTEM;
1424         }
1425         if (dosmode & FILE_ATTRIBUTE_READONLY){
1426                 winattrs |= GPFS_WINATTR_READONLY;
1427         }
1428         if (dosmode & FILE_ATTRIBUTE_SPARSE) {
1429                 winattrs |= GPFS_WINATTR_SPARSE_FILE;
1430         }
1431         if (dosmode & FILE_ATTRIBUTE_OFFLINE) {
1432                 winattrs |= GPFS_WINATTR_OFFLINE;
1433         }
1434
1435         return winattrs;
1436 }
1437
1438 static struct timespec gpfs_timestruc64_to_timespec(struct gpfs_timestruc64 g)
1439 {
1440         return (struct timespec) { .tv_sec = g.tv_sec, .tv_nsec = g.tv_nsec };
1441 }
1442
1443 static NTSTATUS vfs_gpfs_fget_dos_attributes(struct vfs_handle_struct *handle,
1444                                              struct files_struct *fsp,
1445                                              uint32_t *dosmode)
1446 {
1447         struct gpfs_config_data *config;
1448         int fd = fsp_get_pathref_fd(fsp);
1449         struct sys_proc_fd_path_buf buf;
1450         const char *p = NULL;
1451         struct gpfs_iattr64 iattr = { };
1452         unsigned int litemask = 0;
1453         struct timespec ts;
1454         int ret;
1455
1456         SMB_VFS_HANDLE_GET_DATA(handle, config,
1457                                 struct gpfs_config_data,
1458                                 return NT_STATUS_INTERNAL_ERROR);
1459
1460         if (!config->winattr) {
1461                 return SMB_VFS_NEXT_FGET_DOS_ATTRIBUTES(handle, fsp, dosmode);
1462         }
1463
1464         if (fsp->fsp_flags.is_pathref && !config->pathref_ok.gpfs_fstat_x) {
1465                 if (fsp->fsp_flags.have_proc_fds) {
1466                         p = sys_proc_fd_path(fd, &buf);
1467                 } else {
1468                         p = fsp->fsp_name->base_name;
1469                 }
1470         }
1471
1472         if (p != NULL) {
1473                 ret = gpfswrap_stat_x(p, &litemask, &iattr, sizeof(iattr));
1474         } else {
1475                 ret = gpfswrap_fstat_x(fd, &litemask, &iattr, sizeof(iattr));
1476         }
1477         if (ret == -1 && errno == ENOSYS) {
1478                 return SMB_VFS_NEXT_FGET_DOS_ATTRIBUTES(handle, fsp, dosmode);
1479         }
1480
1481         if (ret == -1 && errno == EACCES) {
1482                 int saved_errno = 0;
1483
1484                 /*
1485                  * According to MS-FSA 2.1.5.1.2.1 "Algorithm to Check Access to
1486                  * an Existing File" FILE_LIST_DIRECTORY on a directory implies
1487                  * FILE_READ_ATTRIBUTES for directory entries. Being able to
1488                  * open a file implies FILE_LIST_DIRECTORY.
1489                  */
1490
1491                 set_effective_capability(DAC_OVERRIDE_CAPABILITY);
1492
1493                 if (p != NULL) {
1494                         ret = gpfswrap_stat_x(p,
1495                                               &litemask,
1496                                               &iattr,
1497                                               sizeof(iattr));
1498                 } else {
1499                         ret = gpfswrap_fstat_x(fd,
1500                                                &litemask,
1501                                                &iattr,
1502                                                sizeof(iattr));
1503                 }
1504                 if (ret == -1) {
1505                         saved_errno = errno;
1506                 }
1507
1508                 drop_effective_capability(DAC_OVERRIDE_CAPABILITY);
1509
1510                 if (saved_errno != 0) {
1511                         errno = saved_errno;
1512                 }
1513         }
1514
1515         if (ret == -1) {
1516                 DBG_WARNING("Getting winattrs failed for %s: %s\n",
1517                             fsp->fsp_name->base_name, strerror(errno));
1518                 return map_nt_error_from_unix(errno);
1519         }
1520
1521         ts = gpfs_timestruc64_to_timespec(iattr.ia_createtime);
1522
1523         *dosmode |= vfs_gpfs_winattrs_to_dosmode(iattr.ia_winflags);
1524         update_stat_ex_create_time(&fsp->fsp_name->st, ts);
1525
1526         return NT_STATUS_OK;
1527 }
1528
1529 static NTSTATUS vfs_gpfs_fset_dos_attributes(struct vfs_handle_struct *handle,
1530                                              struct files_struct *fsp,
1531                                              uint32_t dosmode)
1532 {
1533         struct gpfs_config_data *config;
1534         struct gpfs_winattr attrs = { };
1535         int ret;
1536
1537         SMB_VFS_HANDLE_GET_DATA(handle, config,
1538                                 struct gpfs_config_data,
1539                                 return NT_STATUS_INTERNAL_ERROR);
1540
1541         if (!config->winattr) {
1542                 return SMB_VFS_NEXT_FSET_DOS_ATTRIBUTES(handle, fsp, dosmode);
1543         }
1544
1545         attrs.winAttrs = vfs_gpfs_dosmode_to_winattrs(dosmode);
1546
1547         if (!fsp->fsp_flags.is_pathref) {
1548                 ret = gpfswrap_set_winattrs(fsp_get_io_fd(fsp),
1549                                             GPFS_WINATTR_SET_ATTRS, &attrs);
1550                 if (ret == -1) {
1551                         DBG_WARNING("Setting winattrs failed for %s: %s\n",
1552                                     fsp_str_dbg(fsp), strerror(errno));
1553                         return map_nt_error_from_unix(errno);
1554                 }
1555                 return NT_STATUS_OK;
1556         }
1557
1558         if (fsp->fsp_flags.have_proc_fds) {
1559                 int fd = fsp_get_pathref_fd(fsp);
1560                 struct sys_proc_fd_path_buf buf;
1561
1562                 ret = gpfswrap_set_winattrs_path(sys_proc_fd_path(fd, &buf),
1563                                                  GPFS_WINATTR_SET_ATTRS,
1564                                                  &attrs);
1565                 if (ret == -1) {
1566                         DBG_WARNING("Setting winattrs failed for "
1567                                     "[%s][%s]: %s\n",
1568                                     buf.buf,
1569                                     fsp_str_dbg(fsp),
1570                                     strerror(errno));
1571                         return map_nt_error_from_unix(errno);
1572                 }
1573                 return NT_STATUS_OK;
1574         }
1575
1576         /*
1577          * This is no longer a handle based call.
1578          */
1579         ret = gpfswrap_set_winattrs_path(fsp->fsp_name->base_name,
1580                                          GPFS_WINATTR_SET_ATTRS,
1581                                          &attrs);
1582         if (ret == -1) {
1583                 DBG_WARNING("Setting winattrs failed for [%s]: %s\n",
1584                             fsp_str_dbg(fsp), strerror(errno));
1585                 return map_nt_error_from_unix(errno);
1586         }
1587
1588         return NT_STATUS_OK;
1589 }
1590
1591 static int timespec_to_gpfs_time(
1592         struct timespec ts, gpfs_timestruc_t *gt, int idx, int *flags)
1593 {
1594         if (is_omit_timespec(&ts)) {
1595                 return 0;
1596         }
1597
1598         if (ts.tv_sec < 0 || ts.tv_sec > UINT32_MAX) {
1599                 DBG_NOTICE("GPFS uses 32-bit unsigned timestamps "
1600                            "and cannot handle %jd.\n",
1601                            (intmax_t)ts.tv_sec);
1602                 errno = ERANGE;
1603                 return -1;
1604         }
1605
1606         *flags |= 1 << idx;
1607         gt[idx].tv_sec = ts.tv_sec;
1608         gt[idx].tv_nsec = ts.tv_nsec;
1609         DBG_DEBUG("Setting GPFS time %d, flags 0x%x\n", idx, *flags);
1610
1611         return 0;
1612 }
1613
1614 static int smbd_gpfs_set_times(struct files_struct *fsp,
1615                                struct smb_file_time *ft)
1616 {
1617         gpfs_timestruc_t gpfs_times[4];
1618         int flags = 0;
1619         int rc;
1620
1621         ZERO_ARRAY(gpfs_times);
1622         rc = timespec_to_gpfs_time(ft->atime, gpfs_times, 0, &flags);
1623         if (rc != 0) {
1624                 return rc;
1625         }
1626
1627         rc = timespec_to_gpfs_time(ft->mtime, gpfs_times, 1, &flags);
1628         if (rc != 0) {
1629                 return rc;
1630         }
1631
1632         /* No good mapping from LastChangeTime to ctime, not storing */
1633         rc = timespec_to_gpfs_time(ft->create_time, gpfs_times, 3, &flags);
1634         if (rc != 0) {
1635                 return rc;
1636         }
1637
1638         if (!flags) {
1639                 DBG_DEBUG("nothing to do, return to avoid EINVAL\n");
1640                 return 0;
1641         }
1642
1643         if (!fsp->fsp_flags.is_pathref) {
1644                 rc = gpfswrap_set_times(fsp_get_io_fd(fsp), flags, gpfs_times);
1645                 if (rc != 0) {
1646                         DBG_WARNING("gpfs_set_times(%s) failed: %s\n",
1647                                     fsp_str_dbg(fsp), strerror(errno));
1648                 }
1649                 return rc;
1650         }
1651
1652
1653         if (fsp->fsp_flags.have_proc_fds) {
1654                 int fd = fsp_get_pathref_fd(fsp);
1655                 struct sys_proc_fd_path_buf buf;
1656
1657                 rc = gpfswrap_set_times_path(sys_proc_fd_path(fd, &buf),
1658                                              flags,
1659                                              gpfs_times);
1660                 if (rc != 0) {
1661                         DBG_WARNING("gpfs_set_times_path(%s,%s) failed: %s\n",
1662                                     fsp_str_dbg(fsp),
1663                                     buf.buf,
1664                                     strerror(errno));
1665                 }
1666                 return rc;
1667         }
1668
1669         /*
1670          * This is no longer a handle based call.
1671          */
1672
1673         rc = gpfswrap_set_times_path(fsp->fsp_name->base_name,
1674                                      flags,
1675                                      gpfs_times);
1676         if (rc != 0) {
1677                 DBG_WARNING("gpfs_set_times_path(%s) failed: %s\n",
1678                             fsp_str_dbg(fsp), strerror(errno));
1679         }
1680         return rc;
1681 }
1682
1683 static int vfs_gpfs_fntimes(struct vfs_handle_struct *handle,
1684                 files_struct *fsp,
1685                 struct smb_file_time *ft)
1686 {
1687
1688         struct gpfs_winattr attrs;
1689         int ret;
1690         struct gpfs_config_data *config;
1691
1692         SMB_VFS_HANDLE_GET_DATA(handle,
1693                                 config,
1694                                 struct gpfs_config_data,
1695                                 return -1);
1696
1697         /* Try to use gpfs_set_times if it is enabled and available */
1698         if (config->settimes) {
1699                 return smbd_gpfs_set_times(fsp, ft);
1700         }
1701
1702         DBG_DEBUG("gpfs_set_times() not available or disabled, "
1703                   "use ntimes and winattr\n");
1704
1705         ret = SMB_VFS_NEXT_FNTIMES(handle, fsp, ft);
1706         if (ret == -1) {
1707                 /* don't complain if access was denied */
1708                 if (errno != EPERM && errno != EACCES) {
1709                         DBG_WARNING("SMB_VFS_NEXT_FNTIMES failed: %s\n",
1710                                     strerror(errno));
1711                 }
1712                 return -1;
1713         }
1714
1715         if (is_omit_timespec(&ft->create_time)) {
1716                 DBG_DEBUG("Create Time is NULL\n");
1717                 return 0;
1718         }
1719
1720         if (!config->winattr) {
1721                 return 0;
1722         }
1723
1724         attrs.winAttrs = 0;
1725         attrs.creationTime.tv_sec = ft->create_time.tv_sec;
1726         attrs.creationTime.tv_nsec = ft->create_time.tv_nsec;
1727
1728         if (!fsp->fsp_flags.is_pathref) {
1729                 ret = gpfswrap_set_winattrs(fsp_get_io_fd(fsp),
1730                                             GPFS_WINATTR_SET_CREATION_TIME,
1731                                             &attrs);
1732                 if (ret == -1 && errno != ENOSYS) {
1733                         DBG_WARNING("Set GPFS ntimes failed %d\n", ret);
1734                         return -1;
1735                 }
1736                 return ret;
1737         }
1738
1739         if (fsp->fsp_flags.have_proc_fds) {
1740                 int fd = fsp_get_pathref_fd(fsp);
1741                 struct sys_proc_fd_path_buf buf;
1742
1743                 ret = gpfswrap_set_winattrs_path(
1744                         sys_proc_fd_path(fd, &buf),
1745                         GPFS_WINATTR_SET_CREATION_TIME,
1746                         &attrs);
1747                 if (ret == -1 && errno != ENOSYS) {
1748                         DBG_WARNING("Set GPFS ntimes failed %d\n", ret);
1749                         return -1;
1750                 }
1751                 return ret;
1752         }
1753
1754         /*
1755          * This is no longer a handle based call.
1756          */
1757         ret = gpfswrap_set_winattrs_path(fsp->fsp_name->base_name,
1758                                          GPFS_WINATTR_SET_CREATION_TIME,
1759                                          &attrs);
1760         if (ret == -1 && errno != ENOSYS) {
1761                 DBG_WARNING("Set GPFS ntimes failed %d\n", ret);
1762                 return -1;
1763         }
1764
1765         return 0;
1766 }
1767
1768 static int vfs_gpfs_fallocate(struct vfs_handle_struct *handle,
1769                               struct files_struct *fsp, uint32_t mode,
1770                               off_t offset, off_t len)
1771 {
1772         if (mode == (VFS_FALLOCATE_FL_PUNCH_HOLE|VFS_FALLOCATE_FL_KEEP_SIZE) &&
1773             !fsp->fsp_flags.is_sparse &&
1774             lp_strict_allocate(SNUM(fsp->conn))) {
1775                 /*
1776                  * This is from a ZERO_DATA request on a non-sparse
1777                  * file. GPFS does not support FL_KEEP_SIZE and thus
1778                  * cannot fill the whole again in the subsequent
1779                  * fallocate(FL_KEEP_SIZE). Deny this FL_PUNCH_HOLE
1780                  * call to not end up with a hole in a non-sparse
1781                  * file.
1782                  */
1783                 errno = ENOTSUP;
1784                 return -1;
1785         }
1786
1787         return SMB_VFS_NEXT_FALLOCATE(handle, fsp, mode, offset, len);
1788 }
1789
1790 static int vfs_gpfs_ftruncate(vfs_handle_struct *handle, files_struct *fsp,
1791                                 off_t len)
1792 {
1793         int result;
1794         struct gpfs_config_data *config;
1795
1796         SMB_VFS_HANDLE_GET_DATA(handle, config,
1797                                 struct gpfs_config_data,
1798                                 return -1);
1799
1800         if (!config->ftruncate) {
1801                 return SMB_VFS_NEXT_FTRUNCATE(handle, fsp, len);
1802         }
1803
1804         result = gpfswrap_ftruncate(fsp_get_io_fd(fsp), len);
1805         if ((result == -1) && (errno == ENOSYS)) {
1806                 return SMB_VFS_NEXT_FTRUNCATE(handle, fsp, len);
1807         }
1808         return result;
1809 }
1810
1811 static bool vfs_gpfs_is_offline(struct vfs_handle_struct *handle,
1812                                 struct files_struct *fsp,
1813                                 SMB_STRUCT_STAT *sbuf)
1814 {
1815         struct gpfs_winattr attrs;
1816         struct gpfs_config_data *config;
1817         int ret;
1818
1819         SMB_VFS_HANDLE_GET_DATA(handle, config,
1820                                 struct gpfs_config_data,
1821                                 return false);
1822
1823         if (!config->winattr) {
1824                 return false;
1825         }
1826
1827         ret = gpfswrap_get_winattrs(fsp_get_pathref_fd(fsp), &attrs);
1828         if (ret == -1) {
1829                 return false;
1830         }
1831
1832         if ((attrs.winAttrs & GPFS_WINATTR_OFFLINE) != 0) {
1833                 DBG_DEBUG("%s is offline\n", fsp_str_dbg(fsp));
1834                 return true;
1835         }
1836
1837         DBG_DEBUG("%s is online\n", fsp_str_dbg(fsp));
1838         return false;
1839 }
1840
1841 static bool vfs_gpfs_fsp_is_offline(struct vfs_handle_struct *handle,
1842                                     struct files_struct *fsp)
1843 {
1844         struct gpfs_fsp_extension *ext;
1845
1846         ext = VFS_FETCH_FSP_EXTENSION(handle, fsp);
1847         if (ext == NULL) {
1848                 /*
1849                  * Something bad happened, always ask.
1850                  */
1851                 return vfs_gpfs_is_offline(handle, fsp,
1852                                            &fsp->fsp_name->st);
1853         }
1854
1855         if (ext->offline) {
1856                 /*
1857                  * As long as it's offline, ask.
1858                  */
1859                 ext->offline = vfs_gpfs_is_offline(handle, fsp,
1860                                                    &fsp->fsp_name->st);
1861         }
1862
1863         return ext->offline;
1864 }
1865
1866 static bool vfs_gpfs_aio_force(struct vfs_handle_struct *handle,
1867                                struct files_struct *fsp)
1868 {
1869         return vfs_gpfs_fsp_is_offline(handle, fsp);
1870 }
1871
1872 static ssize_t vfs_gpfs_sendfile(vfs_handle_struct *handle, int tofd,
1873                                  files_struct *fsp, const DATA_BLOB *hdr,
1874                                  off_t offset, size_t n)
1875 {
1876         if (vfs_gpfs_fsp_is_offline(handle, fsp)) {
1877                 errno = ENOSYS;
1878                 return -1;
1879         }
1880         return SMB_VFS_NEXT_SENDFILE(handle, tofd, fsp, hdr, offset, n);
1881 }
1882
1883 #ifdef O_PATH
1884 static int vfs_gpfs_check_pathref_fstat_x(struct gpfs_config_data *config,
1885                                           struct connection_struct *conn)
1886 {
1887         struct gpfs_iattr64 iattr = {0};
1888         unsigned int litemask = 0;
1889         int saved_errno;
1890         int fd;
1891         int ret;
1892
1893         fd = open(conn->connectpath, O_PATH);
1894         if (fd == -1) {
1895                 DBG_ERR("openat() of share with O_PATH failed: %s\n",
1896                         strerror(errno));
1897                 return -1;
1898         }
1899
1900         ret = gpfswrap_fstat_x(fd, &litemask, &iattr, sizeof(iattr));
1901         if (ret == 0) {
1902                 close(fd);
1903                 config->pathref_ok.gpfs_fstat_x = true;
1904                 return 0;
1905         }
1906
1907         saved_errno = errno;
1908         ret = close(fd);
1909         if (ret != 0) {
1910                 DBG_ERR("close failed: %s\n", strerror(errno));
1911                 return -1;
1912         }
1913
1914         if (saved_errno != EBADF) {
1915                 DBG_ERR("gpfswrap_fstat_x() of O_PATH handle failed: %s\n",
1916                         strerror(saved_errno));
1917                 return -1;
1918         }
1919
1920         return 0;
1921 }
1922 #endif
1923
1924 static int vfs_gpfs_check_pathref(struct gpfs_config_data *config,
1925                                   struct connection_struct *conn)
1926 {
1927 #ifndef O_PATH
1928         /*
1929          * This code path leaves all struct gpfs_config_data.pathref_ok members
1930          * initialized to false.
1931          */
1932         return 0;
1933 #else
1934         int ret;
1935
1936         ret = vfs_gpfs_check_pathref_fstat_x(config, conn);
1937         if (ret != 0) {
1938                 return -1;
1939         }
1940
1941         return 0;
1942 #endif
1943 }
1944
1945 static int vfs_gpfs_connect(struct vfs_handle_struct *handle,
1946                             const char *service, const char *user)
1947 {
1948         struct gpfs_config_data *config;
1949         int ret;
1950         bool check_fstype;
1951
1952         ret = SMB_VFS_NEXT_CONNECT(handle, service, user);
1953         if (ret < 0) {
1954                 return ret;
1955         }
1956
1957         if (IS_IPC(handle->conn)) {
1958                 return 0;
1959         }
1960
1961         ret = gpfswrap_init();
1962         if (ret < 0) {
1963                 DBG_ERR("Could not load GPFS library.\n");
1964                 return ret;
1965         }
1966
1967         ret = gpfswrap_lib_init(0);
1968         if (ret < 0) {
1969                 DBG_ERR("Could not open GPFS device file: %s\n",
1970                         strerror(errno));
1971                 return ret;
1972         }
1973
1974         ret = gpfswrap_register_cifs_export();
1975         if (ret < 0) {
1976                 DBG_ERR("Failed to register with GPFS: %s\n", strerror(errno));
1977                 return ret;
1978         }
1979
1980         config = talloc_zero(handle->conn, struct gpfs_config_data);
1981         if (!config) {
1982                 DEBUG(0, ("talloc_zero() failed\n"));
1983                 errno = ENOMEM;
1984                 return -1;
1985         }
1986
1987         check_fstype = lp_parm_bool(SNUM(handle->conn), "gpfs",
1988                                     "check_fstype", true);
1989
1990         if (check_fstype) {
1991                 const char *connectpath = handle->conn->connectpath;
1992                 struct statfs buf = { 0 };
1993
1994                 ret = statfs(connectpath, &buf);
1995                 if (ret != 0) {
1996                         DBG_ERR("statfs failed for share %s at path %s: %s\n",
1997                                 service, connectpath, strerror(errno));
1998                         TALLOC_FREE(config);
1999                         return ret;
2000                 }
2001
2002                 if (buf.f_type != GPFS_SUPER_MAGIC) {
2003                         DBG_ERR("SMB share %s, path %s not in GPFS file system."
2004                                 " statfs magic: 0x%jx\n",
2005                                 service,
2006                                 connectpath,
2007                                 (uintmax_t)buf.f_type);
2008                         errno = EINVAL;
2009                         TALLOC_FREE(config);
2010                         return -1;
2011                 }
2012         }
2013
2014         ret = smbacl4_get_vfs_params(handle->conn, &config->nfs4_params);
2015         if (ret < 0) {
2016                 TALLOC_FREE(config);
2017                 return ret;
2018         }
2019
2020         config->sharemodes = lp_parm_bool(SNUM(handle->conn), "gpfs",
2021                                         "sharemodes", true);
2022
2023         config->leases = lp_parm_bool(SNUM(handle->conn), "gpfs",
2024                                         "leases", true);
2025
2026         config->hsm = lp_parm_bool(SNUM(handle->conn), "gpfs",
2027                                    "hsm", false);
2028
2029         config->syncio = lp_parm_bool(SNUM(handle->conn), "gpfs",
2030                                       "syncio", false);
2031
2032         config->winattr = lp_parm_bool(SNUM(handle->conn), "gpfs",
2033                                        "winattr", false);
2034
2035         config->ftruncate = lp_parm_bool(SNUM(handle->conn), "gpfs",
2036                                          "ftruncate", true);
2037
2038         config->getrealfilename = lp_parm_bool(SNUM(handle->conn), "gpfs",
2039                                                "getrealfilename", true);
2040
2041         config->dfreequota = lp_parm_bool(SNUM(handle->conn), "gpfs",
2042                                           "dfreequota", false);
2043
2044         config->acl = lp_parm_bool(SNUM(handle->conn), "gpfs", "acl", true);
2045
2046         config->settimes = lp_parm_bool(SNUM(handle->conn), "gpfs",
2047                                         "settimes", true);
2048         config->recalls = lp_parm_bool(SNUM(handle->conn), "gpfs",
2049                                        "recalls", true);
2050
2051         ret = vfs_gpfs_check_pathref(config, handle->conn);
2052         if (ret != 0) {
2053                 DBG_ERR("vfs_gpfs_check_pathref() on [%s] failed\n",
2054                         handle->conn->connectpath);
2055                 TALLOC_FREE(config);
2056                 return -1;
2057         }
2058
2059         SMB_VFS_HANDLE_SET_DATA(handle, config,
2060                                 NULL, struct gpfs_config_data,
2061                                 return -1);
2062
2063         if (config->leases) {
2064                 /*
2065                  * GPFS lease code is based on kernel oplock code
2066                  * so make sure it is turned on
2067                  */
2068                 if (!lp_kernel_oplocks(SNUM(handle->conn))) {
2069                         DEBUG(5, ("Enabling kernel oplocks for "
2070                                   "gpfs:leases to work\n"));
2071                         lp_do_parameter(SNUM(handle->conn), "kernel oplocks",
2072                                         "true");
2073                 }
2074
2075                 /*
2076                  * as the kernel does not properly support Level II oplocks
2077                  * and GPFS leases code is based on kernel infrastructure, we
2078                  * need to turn off Level II oplocks if gpfs:leases is enabled
2079                  */
2080                 if (lp_level2_oplocks(SNUM(handle->conn))) {
2081                         DEBUG(5, ("gpfs:leases are enabled, disabling "
2082                                   "Level II oplocks\n"));
2083                         lp_do_parameter(SNUM(handle->conn), "level2 oplocks",
2084                                         "false");
2085                 }
2086         }
2087
2088         /*
2089          * Unless we have an async implementation of get_dos_attributes turn
2090          * this off.
2091          */
2092         lp_do_parameter(SNUM(handle->conn), "smbd async dosmode", "false");
2093
2094         return 0;
2095 }
2096
2097 static int get_gpfs_quota(const char *pathname, int type, int id,
2098                           struct gpfs_quotaInfo *qi)
2099 {
2100         int ret;
2101
2102         ret = gpfswrap_quotactl(pathname, GPFS_QCMD(Q_GETQUOTA, type), id, qi);
2103
2104         if (ret) {
2105                 if (errno == GPFS_E_NO_QUOTA_INST) {
2106                         DEBUG(10, ("Quotas disabled on GPFS filesystem.\n"));
2107                 } else if (errno != ENOSYS) {
2108                         DEBUG(0, ("Get quota failed, type %d, id, %d, "
2109                                   "errno %d.\n", type, id, errno));
2110                 }
2111
2112                 return ret;
2113         }
2114
2115         DEBUG(10, ("quota type %d, id %d, blk u:%lld h:%lld s:%lld gt:%u\n",
2116                    type, id, qi->blockUsage, qi->blockHardLimit,
2117                    qi->blockSoftLimit, qi->blockGraceTime));
2118
2119         return ret;
2120 }
2121
2122 static void vfs_gpfs_disk_free_quota(struct gpfs_quotaInfo qi, time_t cur_time,
2123                                      uint64_t *dfree, uint64_t *dsize)
2124 {
2125         uint64_t usage, limit;
2126
2127         /*
2128          * The quota reporting is done in units of 1024 byte blocks, but
2129          * sys_fsusage uses units of 512 byte blocks, adjust the block number
2130          * accordingly. Also filter possibly negative usage counts from gpfs.
2131          */
2132         usage = qi.blockUsage < 0 ? 0 : (uint64_t)qi.blockUsage * 2;
2133         limit = (uint64_t)qi.blockHardLimit * 2;
2134
2135         /*
2136          * When the grace time for the exceeded soft block quota has been
2137          * exceeded, the soft block quota becomes an additional hard limit.
2138          */
2139         if (qi.blockSoftLimit &&
2140             qi.blockGraceTime && cur_time > qi.blockGraceTime) {
2141                 /* report disk as full */
2142                 *dfree = 0;
2143                 *dsize = MIN(*dsize, usage);
2144         }
2145
2146         if (!qi.blockHardLimit)
2147                 return;
2148
2149         if (usage >= limit) {
2150                 /* report disk as full */
2151                 *dfree = 0;
2152                 *dsize = MIN(*dsize, usage);
2153
2154         } else {
2155                 /* limit has not been reached, determine "free space" */
2156                 *dfree = MIN(*dfree, limit - usage);
2157                 *dsize = MIN(*dsize, limit);
2158         }
2159 }
2160
2161 static uint64_t vfs_gpfs_disk_free(vfs_handle_struct *handle,
2162                                 const struct smb_filename *smb_fname,
2163                                 uint64_t *bsize,
2164                                 uint64_t *dfree,
2165                                 uint64_t *dsize)
2166 {
2167         struct security_unix_token *utok;
2168         struct gpfs_quotaInfo qi_user = { 0 }, qi_group = { 0 };
2169         struct gpfs_config_data *config;
2170         int err;
2171         time_t cur_time;
2172
2173         SMB_VFS_HANDLE_GET_DATA(handle, config, struct gpfs_config_data,
2174                                 return (uint64_t)-1);
2175         if (!config->dfreequota) {
2176                 return SMB_VFS_NEXT_DISK_FREE(handle, smb_fname,
2177                                               bsize, dfree, dsize);
2178         }
2179
2180         err = sys_fsusage(smb_fname->base_name, dfree, dsize);
2181         if (err) {
2182                 DEBUG (0, ("Could not get fs usage, errno %d\n", errno));
2183                 return SMB_VFS_NEXT_DISK_FREE(handle, smb_fname,
2184                                               bsize, dfree, dsize);
2185         }
2186
2187         /* sys_fsusage returns units of 512 bytes */
2188         *bsize = 512;
2189
2190         DEBUG(10, ("fs dfree %llu, dsize %llu\n",
2191                    (unsigned long long)*dfree, (unsigned long long)*dsize));
2192
2193         utok = handle->conn->session_info->unix_token;
2194
2195         err = get_gpfs_quota(smb_fname->base_name,
2196                         GPFS_USRQUOTA, utok->uid, &qi_user);
2197         if (err) {
2198                 return SMB_VFS_NEXT_DISK_FREE(handle, smb_fname,
2199                                               bsize, dfree, dsize);
2200         }
2201
2202         /*
2203          * If new files created under this folder get this folder's
2204          * GID, then available space is governed by the quota of the
2205          * folder's GID, not the primary group of the creating user.
2206          */
2207         if (VALID_STAT(smb_fname->st) &&
2208             S_ISDIR(smb_fname->st.st_ex_mode) &&
2209             smb_fname->st.st_ex_mode & S_ISGID) {
2210                 become_root();
2211                 err = get_gpfs_quota(smb_fname->base_name, GPFS_GRPQUOTA,
2212                                      smb_fname->st.st_ex_gid, &qi_group);
2213                 unbecome_root();
2214
2215         } else {
2216                 err = get_gpfs_quota(smb_fname->base_name, GPFS_GRPQUOTA,
2217                                      utok->gid, &qi_group);
2218         }
2219
2220         if (err) {
2221                 return SMB_VFS_NEXT_DISK_FREE(handle, smb_fname,
2222                                               bsize, dfree, dsize);
2223         }
2224
2225         cur_time = time(NULL);
2226
2227         /* Adjust free space and size according to quota limits. */
2228         vfs_gpfs_disk_free_quota(qi_user, cur_time, dfree, dsize);
2229         vfs_gpfs_disk_free_quota(qi_group, cur_time, dfree, dsize);
2230
2231         return *dfree / 2;
2232 }
2233
2234 static int vfs_gpfs_get_quota(vfs_handle_struct *handle,
2235                                 const struct smb_filename *smb_fname,
2236                                 enum SMB_QUOTA_TYPE qtype,
2237                                 unid_t id,
2238                                 SMB_DISK_QUOTA *dq)
2239 {
2240         switch(qtype) {
2241                 /*
2242                  * User/group quota are being used for disk-free
2243                  * determination, which in this module is done directly
2244                  * by the disk-free function. It's important that this
2245                  * module does not return wrong quota values by mistake,
2246                  * which would modify the correct values set by disk-free.
2247                  * User/group quota are also being used for processing
2248                  * NT_TRANSACT_GET_USER_QUOTA in smb1 protocol, which is
2249                  * currently not supported by this module.
2250                  */
2251                 case SMB_USER_QUOTA_TYPE:
2252                 case SMB_GROUP_QUOTA_TYPE:
2253                         errno = ENOSYS;
2254                         return -1;
2255                 default:
2256                         return SMB_VFS_NEXT_GET_QUOTA(handle, smb_fname,
2257                                         qtype, id, dq);
2258         }
2259 }
2260
2261 static uint32_t vfs_gpfs_capabilities(struct vfs_handle_struct *handle,
2262                                       enum timestamp_set_resolution *p_ts_res)
2263 {
2264         struct gpfs_config_data *config;
2265         uint32_t next;
2266
2267         next = SMB_VFS_NEXT_FS_CAPABILITIES(handle, p_ts_res);
2268
2269         SMB_VFS_HANDLE_GET_DATA(handle, config,
2270                                 struct gpfs_config_data,
2271                                 return next);
2272
2273         if (config->hsm) {
2274                 next |= FILE_SUPPORTS_REMOTE_STORAGE;
2275         }
2276         return next;
2277 }
2278
2279 static int vfs_gpfs_openat(struct vfs_handle_struct *handle,
2280                            const struct files_struct *dirfsp,
2281                            const struct smb_filename *smb_fname,
2282                            files_struct *fsp,
2283                            const struct vfs_open_how *_how)
2284 {
2285         struct vfs_open_how how = *_how;
2286         struct gpfs_config_data *config = NULL;
2287         struct gpfs_fsp_extension *ext = NULL;
2288         int ret;
2289
2290         SMB_VFS_HANDLE_GET_DATA(handle, config,
2291                                 struct gpfs_config_data,
2292                                 return -1);
2293
2294         if (config->hsm && !config->recalls &&
2295             !fsp->fsp_flags.is_pathref &&
2296             vfs_gpfs_fsp_is_offline(handle, fsp))
2297         {
2298                 DBG_DEBUG("Refusing access to offline file %s\n",
2299                           fsp_str_dbg(fsp));
2300                 errno = EACCES;
2301                 return -1;
2302         }
2303
2304         if (config->syncio) {
2305                 how.flags |= O_SYNC;
2306         }
2307
2308         ext = VFS_ADD_FSP_EXTENSION(handle, fsp, struct gpfs_fsp_extension,
2309                                     NULL);
2310         if (ext == NULL) {
2311                 errno = ENOMEM;
2312                 return -1;
2313         }
2314
2315         /*
2316          * Assume the file is offline until gpfs tells us it's online.
2317          */
2318         *ext = (struct gpfs_fsp_extension) { .offline = true };
2319
2320         ret = SMB_VFS_NEXT_OPENAT(handle, dirfsp, smb_fname, fsp, &how);
2321         if (ret == -1) {
2322                 VFS_REMOVE_FSP_EXTENSION(handle, fsp);
2323         }
2324         return ret;
2325 }
2326
2327 static ssize_t vfs_gpfs_pread(vfs_handle_struct *handle, files_struct *fsp,
2328                               void *data, size_t n, off_t offset)
2329 {
2330         ssize_t ret;
2331         bool was_offline;
2332
2333         was_offline = vfs_gpfs_fsp_is_offline(handle, fsp);
2334
2335         ret = SMB_VFS_NEXT_PREAD(handle, fsp, data, n, offset);
2336
2337         if ((ret != -1) && was_offline) {
2338                 notify_fname(handle->conn, NOTIFY_ACTION_MODIFIED,
2339                              FILE_NOTIFY_CHANGE_ATTRIBUTES,
2340                              fsp->fsp_name->base_name);
2341         }
2342
2343         return ret;
2344 }
2345
2346 struct vfs_gpfs_pread_state {
2347         struct files_struct *fsp;
2348         ssize_t ret;
2349         bool was_offline;
2350         struct vfs_aio_state vfs_aio_state;
2351 };
2352
2353 static void vfs_gpfs_pread_done(struct tevent_req *subreq);
2354
2355 static struct tevent_req *vfs_gpfs_pread_send(struct vfs_handle_struct *handle,
2356                                               TALLOC_CTX *mem_ctx,
2357                                               struct tevent_context *ev,
2358                                               struct files_struct *fsp,
2359                                               void *data, size_t n,
2360                                               off_t offset)
2361 {
2362         struct tevent_req *req, *subreq;
2363         struct vfs_gpfs_pread_state *state;
2364
2365         req = tevent_req_create(mem_ctx, &state, struct vfs_gpfs_pread_state);
2366         if (req == NULL) {
2367                 return NULL;
2368         }
2369         state->was_offline = vfs_gpfs_fsp_is_offline(handle, fsp);
2370         state->fsp = fsp;
2371         subreq = SMB_VFS_NEXT_PREAD_SEND(state, ev, handle, fsp, data,
2372                                          n, offset);
2373         if (tevent_req_nomem(subreq, req)) {
2374                 return tevent_req_post(req, ev);
2375         }
2376         tevent_req_set_callback(subreq, vfs_gpfs_pread_done, req);
2377         return req;
2378 }
2379
2380 static void vfs_gpfs_pread_done(struct tevent_req *subreq)
2381 {
2382         struct tevent_req *req = tevent_req_callback_data(
2383                 subreq, struct tevent_req);
2384         struct vfs_gpfs_pread_state *state = tevent_req_data(
2385                 req, struct vfs_gpfs_pread_state);
2386
2387         state->ret = SMB_VFS_PREAD_RECV(subreq, &state->vfs_aio_state);
2388         TALLOC_FREE(subreq);
2389         tevent_req_done(req);
2390 }
2391
2392 static ssize_t vfs_gpfs_pread_recv(struct tevent_req *req,
2393                                    struct vfs_aio_state *vfs_aio_state)
2394 {
2395         struct vfs_gpfs_pread_state *state = tevent_req_data(
2396                 req, struct vfs_gpfs_pread_state);
2397         struct files_struct *fsp = state->fsp;
2398
2399         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
2400                 return -1;
2401         }
2402         *vfs_aio_state = state->vfs_aio_state;
2403
2404         if ((state->ret != -1) && state->was_offline) {
2405                 DEBUG(10, ("sending notify\n"));
2406                 notify_fname(fsp->conn, NOTIFY_ACTION_MODIFIED,
2407                              FILE_NOTIFY_CHANGE_ATTRIBUTES,
2408                              fsp->fsp_name->base_name);
2409         }
2410
2411         return state->ret;
2412 }
2413
2414 static ssize_t vfs_gpfs_pwrite(vfs_handle_struct *handle, files_struct *fsp,
2415                                const void *data, size_t n, off_t offset)
2416 {
2417         ssize_t ret;
2418         bool was_offline;
2419
2420         was_offline = vfs_gpfs_fsp_is_offline(handle, fsp);
2421
2422         ret = SMB_VFS_NEXT_PWRITE(handle, fsp, data, n, offset);
2423
2424         if ((ret != -1) && was_offline) {
2425                 notify_fname(handle->conn, NOTIFY_ACTION_MODIFIED,
2426                              FILE_NOTIFY_CHANGE_ATTRIBUTES,
2427                              fsp->fsp_name->base_name);
2428         }
2429
2430         return ret;
2431 }
2432
2433 struct vfs_gpfs_pwrite_state {
2434         struct files_struct *fsp;
2435         ssize_t ret;
2436         bool was_offline;
2437         struct vfs_aio_state vfs_aio_state;
2438 };
2439
2440 static void vfs_gpfs_pwrite_done(struct tevent_req *subreq);
2441
2442 static struct tevent_req *vfs_gpfs_pwrite_send(
2443         struct vfs_handle_struct *handle,
2444         TALLOC_CTX *mem_ctx,
2445         struct tevent_context *ev,
2446         struct files_struct *fsp,
2447         const void *data, size_t n,
2448         off_t offset)
2449 {
2450         struct tevent_req *req, *subreq;
2451         struct vfs_gpfs_pwrite_state *state;
2452
2453         req = tevent_req_create(mem_ctx, &state, struct vfs_gpfs_pwrite_state);
2454         if (req == NULL) {
2455                 return NULL;
2456         }
2457         state->was_offline = vfs_gpfs_fsp_is_offline(handle, fsp);
2458         state->fsp = fsp;
2459         subreq = SMB_VFS_NEXT_PWRITE_SEND(state, ev, handle, fsp, data,
2460                                          n, offset);
2461         if (tevent_req_nomem(subreq, req)) {
2462                 return tevent_req_post(req, ev);
2463         }
2464         tevent_req_set_callback(subreq, vfs_gpfs_pwrite_done, req);
2465         return req;
2466 }
2467
2468 static void vfs_gpfs_pwrite_done(struct tevent_req *subreq)
2469 {
2470         struct tevent_req *req = tevent_req_callback_data(
2471                 subreq, struct tevent_req);
2472         struct vfs_gpfs_pwrite_state *state = tevent_req_data(
2473                 req, struct vfs_gpfs_pwrite_state);
2474
2475         state->ret = SMB_VFS_PWRITE_RECV(subreq, &state->vfs_aio_state);
2476         TALLOC_FREE(subreq);
2477         tevent_req_done(req);
2478 }
2479
2480 static ssize_t vfs_gpfs_pwrite_recv(struct tevent_req *req,
2481                                     struct vfs_aio_state *vfs_aio_state)
2482 {
2483         struct vfs_gpfs_pwrite_state *state = tevent_req_data(
2484                 req, struct vfs_gpfs_pwrite_state);
2485         struct files_struct *fsp = state->fsp;
2486
2487         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
2488                 return -1;
2489         }
2490         *vfs_aio_state = state->vfs_aio_state;
2491
2492         if ((state->ret != -1) && state->was_offline) {
2493                 DEBUG(10, ("sending notify\n"));
2494                 notify_fname(fsp->conn, NOTIFY_ACTION_MODIFIED,
2495                              FILE_NOTIFY_CHANGE_ATTRIBUTES,
2496                              fsp->fsp_name->base_name);
2497         }
2498
2499         return state->ret;
2500 }
2501
2502
2503 static struct vfs_fn_pointers vfs_gpfs_fns = {
2504         .connect_fn = vfs_gpfs_connect,
2505         .disk_free_fn = vfs_gpfs_disk_free,
2506         .get_quota_fn = vfs_gpfs_get_quota,
2507         .fs_capabilities_fn = vfs_gpfs_capabilities,
2508         .filesystem_sharemode_fn = vfs_gpfs_filesystem_sharemode,
2509         .linux_setlease_fn = vfs_gpfs_setlease,
2510         .get_real_filename_at_fn = vfs_gpfs_get_real_filename_at,
2511         .get_dos_attributes_send_fn = vfs_not_implemented_get_dos_attributes_send,
2512         .get_dos_attributes_recv_fn = vfs_not_implemented_get_dos_attributes_recv,
2513         .fget_dos_attributes_fn = vfs_gpfs_fget_dos_attributes,
2514         .fset_dos_attributes_fn = vfs_gpfs_fset_dos_attributes,
2515         .fget_nt_acl_fn = gpfsacl_fget_nt_acl,
2516         .fset_nt_acl_fn = gpfsacl_fset_nt_acl,
2517         .sys_acl_get_fd_fn = gpfsacl_sys_acl_get_fd,
2518         .sys_acl_blob_get_fd_fn = gpfsacl_sys_acl_blob_get_fd,
2519         .sys_acl_set_fd_fn = gpfsacl_sys_acl_set_fd,
2520         .sys_acl_delete_def_fd_fn = gpfsacl_sys_acl_delete_def_fd,
2521         .fchmod_fn = vfs_gpfs_fchmod,
2522         .close_fn = vfs_gpfs_close,
2523         .stat_fn = nfs4_acl_stat,
2524         .fstat_fn = nfs4_acl_fstat,
2525         .lstat_fn = nfs4_acl_lstat,
2526         .fstatat_fn = nfs4_acl_fstatat,
2527         .fntimes_fn = vfs_gpfs_fntimes,
2528         .aio_force_fn = vfs_gpfs_aio_force,
2529         .sendfile_fn = vfs_gpfs_sendfile,
2530         .fallocate_fn = vfs_gpfs_fallocate,
2531         .openat_fn = vfs_gpfs_openat,
2532         .pread_fn = vfs_gpfs_pread,
2533         .pread_send_fn = vfs_gpfs_pread_send,
2534         .pread_recv_fn = vfs_gpfs_pread_recv,
2535         .pwrite_fn = vfs_gpfs_pwrite,
2536         .pwrite_send_fn = vfs_gpfs_pwrite_send,
2537         .pwrite_recv_fn = vfs_gpfs_pwrite_recv,
2538         .ftruncate_fn = vfs_gpfs_ftruncate
2539 };
2540
2541 static_decl_vfs;
2542 NTSTATUS vfs_gpfs_init(TALLOC_CTX *ctx)
2543 {
2544         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "gpfs",
2545                                 &vfs_gpfs_fns);
2546 }