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 vfs_gpfs_lstat(struct vfs_handle_struct *handle,
1592                           struct smb_filename *smb_fname)
1593 {
1594         int ret;
1595
1596         ret = SMB_VFS_NEXT_LSTAT(handle, smb_fname);
1597         if (ret == -1 && errno == EACCES) {
1598                 DEBUG(10, ("Trying lstat with capability for %s\n",
1599                            smb_fname->base_name));
1600                 ret = stat_with_cap_dac_override(handle, smb_fname,
1601                                                  AT_SYMLINK_NOFOLLOW);
1602         }
1603         return ret;
1604 }
1605
1606 static int vfs_gpfs_fstatat(struct vfs_handle_struct *handle,
1607                             const struct files_struct *dirfsp,
1608                             const struct smb_filename *smb_fname,
1609                             SMB_STRUCT_STAT *sbuf,
1610                             int flags)
1611 {
1612         int ret;
1613
1614         ret = SMB_VFS_NEXT_FSTATAT(handle, dirfsp, smb_fname, sbuf, flags);
1615         if (ret == -1 && errno == EACCES) {
1616                 bool fake_dctime =
1617                         lp_fake_directory_create_times(SNUM(handle->conn));
1618
1619                 DBG_DEBUG("fstatat for %s failed with EACCES. Trying with "
1620                           "CAP_DAC_OVERRIDE.\n", dirfsp->fsp_name->base_name);
1621                 ret = fstatat_with_cap_dac_override(fsp_get_pathref_fd(dirfsp),
1622                                                     smb_fname->base_name,
1623                                                     sbuf,
1624                                                     flags,
1625                                                     fake_dctime);
1626         }
1627
1628         return ret;
1629 }
1630
1631 static int timespec_to_gpfs_time(
1632         struct timespec ts, gpfs_timestruc_t *gt, int idx, int *flags)
1633 {
1634         if (is_omit_timespec(&ts)) {
1635                 return 0;
1636         }
1637
1638         if (ts.tv_sec < 0 || ts.tv_sec > UINT32_MAX) {
1639                 DBG_NOTICE("GPFS uses 32-bit unsigned timestamps "
1640                            "and cannot handle %jd.\n",
1641                            (intmax_t)ts.tv_sec);
1642                 errno = ERANGE;
1643                 return -1;
1644         }
1645
1646         *flags |= 1 << idx;
1647         gt[idx].tv_sec = ts.tv_sec;
1648         gt[idx].tv_nsec = ts.tv_nsec;
1649         DBG_DEBUG("Setting GPFS time %d, flags 0x%x\n", idx, *flags);
1650
1651         return 0;
1652 }
1653
1654 static int smbd_gpfs_set_times(struct files_struct *fsp,
1655                                struct smb_file_time *ft)
1656 {
1657         gpfs_timestruc_t gpfs_times[4];
1658         int flags = 0;
1659         int rc;
1660
1661         ZERO_ARRAY(gpfs_times);
1662         rc = timespec_to_gpfs_time(ft->atime, gpfs_times, 0, &flags);
1663         if (rc != 0) {
1664                 return rc;
1665         }
1666
1667         rc = timespec_to_gpfs_time(ft->mtime, gpfs_times, 1, &flags);
1668         if (rc != 0) {
1669                 return rc;
1670         }
1671
1672         /* No good mapping from LastChangeTime to ctime, not storing */
1673         rc = timespec_to_gpfs_time(ft->create_time, gpfs_times, 3, &flags);
1674         if (rc != 0) {
1675                 return rc;
1676         }
1677
1678         if (!flags) {
1679                 DBG_DEBUG("nothing to do, return to avoid EINVAL\n");
1680                 return 0;
1681         }
1682
1683         if (!fsp->fsp_flags.is_pathref) {
1684                 rc = gpfswrap_set_times(fsp_get_io_fd(fsp), flags, gpfs_times);
1685                 if (rc != 0) {
1686                         DBG_WARNING("gpfs_set_times(%s) failed: %s\n",
1687                                     fsp_str_dbg(fsp), strerror(errno));
1688                 }
1689                 return rc;
1690         }
1691
1692
1693         if (fsp->fsp_flags.have_proc_fds) {
1694                 int fd = fsp_get_pathref_fd(fsp);
1695                 struct sys_proc_fd_path_buf buf;
1696
1697                 rc = gpfswrap_set_times_path(sys_proc_fd_path(fd, &buf),
1698                                              flags,
1699                                              gpfs_times);
1700                 if (rc != 0) {
1701                         DBG_WARNING("gpfs_set_times_path(%s,%s) failed: %s\n",
1702                                     fsp_str_dbg(fsp),
1703                                     buf.buf,
1704                                     strerror(errno));
1705                 }
1706                 return rc;
1707         }
1708
1709         /*
1710          * This is no longer a handle based call.
1711          */
1712
1713         rc = gpfswrap_set_times_path(fsp->fsp_name->base_name,
1714                                      flags,
1715                                      gpfs_times);
1716         if (rc != 0) {
1717                 DBG_WARNING("gpfs_set_times_path(%s) failed: %s\n",
1718                             fsp_str_dbg(fsp), strerror(errno));
1719         }
1720         return rc;
1721 }
1722
1723 static int vfs_gpfs_fntimes(struct vfs_handle_struct *handle,
1724                 files_struct *fsp,
1725                 struct smb_file_time *ft)
1726 {
1727
1728         struct gpfs_winattr attrs;
1729         int ret;
1730         struct gpfs_config_data *config;
1731
1732         SMB_VFS_HANDLE_GET_DATA(handle,
1733                                 config,
1734                                 struct gpfs_config_data,
1735                                 return -1);
1736
1737         /* Try to use gpfs_set_times if it is enabled and available */
1738         if (config->settimes) {
1739                 return smbd_gpfs_set_times(fsp, ft);
1740         }
1741
1742         DBG_DEBUG("gpfs_set_times() not available or disabled, "
1743                   "use ntimes and winattr\n");
1744
1745         ret = SMB_VFS_NEXT_FNTIMES(handle, fsp, ft);
1746         if (ret == -1) {
1747                 /* don't complain if access was denied */
1748                 if (errno != EPERM && errno != EACCES) {
1749                         DBG_WARNING("SMB_VFS_NEXT_FNTIMES failed: %s\n",
1750                                     strerror(errno));
1751                 }
1752                 return -1;
1753         }
1754
1755         if (is_omit_timespec(&ft->create_time)) {
1756                 DBG_DEBUG("Create Time is NULL\n");
1757                 return 0;
1758         }
1759
1760         if (!config->winattr) {
1761                 return 0;
1762         }
1763
1764         attrs.winAttrs = 0;
1765         attrs.creationTime.tv_sec = ft->create_time.tv_sec;
1766         attrs.creationTime.tv_nsec = ft->create_time.tv_nsec;
1767
1768         if (!fsp->fsp_flags.is_pathref) {
1769                 ret = gpfswrap_set_winattrs(fsp_get_io_fd(fsp),
1770                                             GPFS_WINATTR_SET_CREATION_TIME,
1771                                             &attrs);
1772                 if (ret == -1 && errno != ENOSYS) {
1773                         DBG_WARNING("Set GPFS ntimes failed %d\n", ret);
1774                         return -1;
1775                 }
1776                 return ret;
1777         }
1778
1779         if (fsp->fsp_flags.have_proc_fds) {
1780                 int fd = fsp_get_pathref_fd(fsp);
1781                 struct sys_proc_fd_path_buf buf;
1782
1783                 ret = gpfswrap_set_winattrs_path(
1784                         sys_proc_fd_path(fd, &buf),
1785                         GPFS_WINATTR_SET_CREATION_TIME,
1786                         &attrs);
1787                 if (ret == -1 && errno != ENOSYS) {
1788                         DBG_WARNING("Set GPFS ntimes failed %d\n", ret);
1789                         return -1;
1790                 }
1791                 return ret;
1792         }
1793
1794         /*
1795          * This is no longer a handle based call.
1796          */
1797         ret = gpfswrap_set_winattrs_path(fsp->fsp_name->base_name,
1798                                          GPFS_WINATTR_SET_CREATION_TIME,
1799                                          &attrs);
1800         if (ret == -1 && errno != ENOSYS) {
1801                 DBG_WARNING("Set GPFS ntimes failed %d\n", ret);
1802                 return -1;
1803         }
1804
1805         return 0;
1806 }
1807
1808 static int vfs_gpfs_fallocate(struct vfs_handle_struct *handle,
1809                               struct files_struct *fsp, uint32_t mode,
1810                               off_t offset, off_t len)
1811 {
1812         if (mode == (VFS_FALLOCATE_FL_PUNCH_HOLE|VFS_FALLOCATE_FL_KEEP_SIZE) &&
1813             !fsp->fsp_flags.is_sparse &&
1814             lp_strict_allocate(SNUM(fsp->conn))) {
1815                 /*
1816                  * This is from a ZERO_DATA request on a non-sparse
1817                  * file. GPFS does not support FL_KEEP_SIZE and thus
1818                  * cannot fill the whole again in the subsequent
1819                  * fallocate(FL_KEEP_SIZE). Deny this FL_PUNCH_HOLE
1820                  * call to not end up with a hole in a non-sparse
1821                  * file.
1822                  */
1823                 errno = ENOTSUP;
1824                 return -1;
1825         }
1826
1827         return SMB_VFS_NEXT_FALLOCATE(handle, fsp, mode, offset, len);
1828 }
1829
1830 static int vfs_gpfs_ftruncate(vfs_handle_struct *handle, files_struct *fsp,
1831                                 off_t len)
1832 {
1833         int result;
1834         struct gpfs_config_data *config;
1835
1836         SMB_VFS_HANDLE_GET_DATA(handle, config,
1837                                 struct gpfs_config_data,
1838                                 return -1);
1839
1840         if (!config->ftruncate) {
1841                 return SMB_VFS_NEXT_FTRUNCATE(handle, fsp, len);
1842         }
1843
1844         result = gpfswrap_ftruncate(fsp_get_io_fd(fsp), len);
1845         if ((result == -1) && (errno == ENOSYS)) {
1846                 return SMB_VFS_NEXT_FTRUNCATE(handle, fsp, len);
1847         }
1848         return result;
1849 }
1850
1851 static bool vfs_gpfs_is_offline(struct vfs_handle_struct *handle,
1852                                 struct files_struct *fsp,
1853                                 SMB_STRUCT_STAT *sbuf)
1854 {
1855         struct gpfs_winattr attrs;
1856         struct gpfs_config_data *config;
1857         int ret;
1858
1859         SMB_VFS_HANDLE_GET_DATA(handle, config,
1860                                 struct gpfs_config_data,
1861                                 return false);
1862
1863         if (!config->winattr) {
1864                 return false;
1865         }
1866
1867         ret = gpfswrap_get_winattrs(fsp_get_pathref_fd(fsp), &attrs);
1868         if (ret == -1) {
1869                 return false;
1870         }
1871
1872         if ((attrs.winAttrs & GPFS_WINATTR_OFFLINE) != 0) {
1873                 DBG_DEBUG("%s is offline\n", fsp_str_dbg(fsp));
1874                 return true;
1875         }
1876
1877         DBG_DEBUG("%s is online\n", fsp_str_dbg(fsp));
1878         return false;
1879 }
1880
1881 static bool vfs_gpfs_fsp_is_offline(struct vfs_handle_struct *handle,
1882                                     struct files_struct *fsp)
1883 {
1884         struct gpfs_fsp_extension *ext;
1885
1886         ext = VFS_FETCH_FSP_EXTENSION(handle, fsp);
1887         if (ext == NULL) {
1888                 /*
1889                  * Something bad happened, always ask.
1890                  */
1891                 return vfs_gpfs_is_offline(handle, fsp,
1892                                            &fsp->fsp_name->st);
1893         }
1894
1895         if (ext->offline) {
1896                 /*
1897                  * As long as it's offline, ask.
1898                  */
1899                 ext->offline = vfs_gpfs_is_offline(handle, fsp,
1900                                                    &fsp->fsp_name->st);
1901         }
1902
1903         return ext->offline;
1904 }
1905
1906 static bool vfs_gpfs_aio_force(struct vfs_handle_struct *handle,
1907                                struct files_struct *fsp)
1908 {
1909         return vfs_gpfs_fsp_is_offline(handle, fsp);
1910 }
1911
1912 static ssize_t vfs_gpfs_sendfile(vfs_handle_struct *handle, int tofd,
1913                                  files_struct *fsp, const DATA_BLOB *hdr,
1914                                  off_t offset, size_t n)
1915 {
1916         if (vfs_gpfs_fsp_is_offline(handle, fsp)) {
1917                 errno = ENOSYS;
1918                 return -1;
1919         }
1920         return SMB_VFS_NEXT_SENDFILE(handle, tofd, fsp, hdr, offset, n);
1921 }
1922
1923 #ifdef O_PATH
1924 static int vfs_gpfs_check_pathref_fstat_x(struct gpfs_config_data *config,
1925                                           struct connection_struct *conn)
1926 {
1927         struct gpfs_iattr64 iattr = {0};
1928         unsigned int litemask = 0;
1929         int saved_errno;
1930         int fd;
1931         int ret;
1932
1933         fd = open(conn->connectpath, O_PATH);
1934         if (fd == -1) {
1935                 DBG_ERR("openat() of share with O_PATH failed: %s\n",
1936                         strerror(errno));
1937                 return -1;
1938         }
1939
1940         ret = gpfswrap_fstat_x(fd, &litemask, &iattr, sizeof(iattr));
1941         if (ret == 0) {
1942                 close(fd);
1943                 config->pathref_ok.gpfs_fstat_x = true;
1944                 return 0;
1945         }
1946
1947         saved_errno = errno;
1948         ret = close(fd);
1949         if (ret != 0) {
1950                 DBG_ERR("close failed: %s\n", strerror(errno));
1951                 return -1;
1952         }
1953
1954         if (saved_errno != EBADF) {
1955                 DBG_ERR("gpfswrap_fstat_x() of O_PATH handle failed: %s\n",
1956                         strerror(saved_errno));
1957                 return -1;
1958         }
1959
1960         return 0;
1961 }
1962 #endif
1963
1964 static int vfs_gpfs_check_pathref(struct gpfs_config_data *config,
1965                                   struct connection_struct *conn)
1966 {
1967 #ifndef O_PATH
1968         /*
1969          * This code path leaves all struct gpfs_config_data.pathref_ok members
1970          * initialized to false.
1971          */
1972         return 0;
1973 #else
1974         int ret;
1975
1976         ret = vfs_gpfs_check_pathref_fstat_x(config, conn);
1977         if (ret != 0) {
1978                 return -1;
1979         }
1980
1981         return 0;
1982 #endif
1983 }
1984
1985 static int vfs_gpfs_connect(struct vfs_handle_struct *handle,
1986                             const char *service, const char *user)
1987 {
1988         struct gpfs_config_data *config;
1989         int ret;
1990         bool check_fstype;
1991
1992         ret = SMB_VFS_NEXT_CONNECT(handle, service, user);
1993         if (ret < 0) {
1994                 return ret;
1995         }
1996
1997         if (IS_IPC(handle->conn)) {
1998                 return 0;
1999         }
2000
2001         ret = gpfswrap_init();
2002         if (ret < 0) {
2003                 DBG_ERR("Could not load GPFS library.\n");
2004                 return ret;
2005         }
2006
2007         ret = gpfswrap_lib_init(0);
2008         if (ret < 0) {
2009                 DBG_ERR("Could not open GPFS device file: %s\n",
2010                         strerror(errno));
2011                 return ret;
2012         }
2013
2014         ret = gpfswrap_register_cifs_export();
2015         if (ret < 0) {
2016                 DBG_ERR("Failed to register with GPFS: %s\n", strerror(errno));
2017                 return ret;
2018         }
2019
2020         config = talloc_zero(handle->conn, struct gpfs_config_data);
2021         if (!config) {
2022                 DEBUG(0, ("talloc_zero() failed\n"));
2023                 errno = ENOMEM;
2024                 return -1;
2025         }
2026
2027         check_fstype = lp_parm_bool(SNUM(handle->conn), "gpfs",
2028                                     "check_fstype", true);
2029
2030         if (check_fstype) {
2031                 const char *connectpath = handle->conn->connectpath;
2032                 struct statfs buf = { 0 };
2033
2034                 ret = statfs(connectpath, &buf);
2035                 if (ret != 0) {
2036                         DBG_ERR("statfs failed for share %s at path %s: %s\n",
2037                                 service, connectpath, strerror(errno));
2038                         TALLOC_FREE(config);
2039                         return ret;
2040                 }
2041
2042                 if (buf.f_type != GPFS_SUPER_MAGIC) {
2043                         DBG_ERR("SMB share %s, path %s not in GPFS file system."
2044                                 " statfs magic: 0x%jx\n",
2045                                 service,
2046                                 connectpath,
2047                                 (uintmax_t)buf.f_type);
2048                         errno = EINVAL;
2049                         TALLOC_FREE(config);
2050                         return -1;
2051                 }
2052         }
2053
2054         ret = smbacl4_get_vfs_params(handle->conn, &config->nfs4_params);
2055         if (ret < 0) {
2056                 TALLOC_FREE(config);
2057                 return ret;
2058         }
2059
2060         config->sharemodes = lp_parm_bool(SNUM(handle->conn), "gpfs",
2061                                         "sharemodes", true);
2062
2063         config->leases = lp_parm_bool(SNUM(handle->conn), "gpfs",
2064                                         "leases", true);
2065
2066         config->hsm = lp_parm_bool(SNUM(handle->conn), "gpfs",
2067                                    "hsm", false);
2068
2069         config->syncio = lp_parm_bool(SNUM(handle->conn), "gpfs",
2070                                       "syncio", false);
2071
2072         config->winattr = lp_parm_bool(SNUM(handle->conn), "gpfs",
2073                                        "winattr", false);
2074
2075         config->ftruncate = lp_parm_bool(SNUM(handle->conn), "gpfs",
2076                                          "ftruncate", true);
2077
2078         config->getrealfilename = lp_parm_bool(SNUM(handle->conn), "gpfs",
2079                                                "getrealfilename", true);
2080
2081         config->dfreequota = lp_parm_bool(SNUM(handle->conn), "gpfs",
2082                                           "dfreequota", false);
2083
2084         config->acl = lp_parm_bool(SNUM(handle->conn), "gpfs", "acl", true);
2085
2086         config->settimes = lp_parm_bool(SNUM(handle->conn), "gpfs",
2087                                         "settimes", true);
2088         config->recalls = lp_parm_bool(SNUM(handle->conn), "gpfs",
2089                                        "recalls", true);
2090
2091         ret = vfs_gpfs_check_pathref(config, handle->conn);
2092         if (ret != 0) {
2093                 DBG_ERR("vfs_gpfs_check_pathref() on [%s] failed\n",
2094                         handle->conn->connectpath);
2095                 TALLOC_FREE(config);
2096                 return -1;
2097         }
2098
2099         SMB_VFS_HANDLE_SET_DATA(handle, config,
2100                                 NULL, struct gpfs_config_data,
2101                                 return -1);
2102
2103         if (config->leases) {
2104                 /*
2105                  * GPFS lease code is based on kernel oplock code
2106                  * so make sure it is turned on
2107                  */
2108                 if (!lp_kernel_oplocks(SNUM(handle->conn))) {
2109                         DEBUG(5, ("Enabling kernel oplocks for "
2110                                   "gpfs:leases to work\n"));
2111                         lp_do_parameter(SNUM(handle->conn), "kernel oplocks",
2112                                         "true");
2113                 }
2114
2115                 /*
2116                  * as the kernel does not properly support Level II oplocks
2117                  * and GPFS leases code is based on kernel infrastructure, we
2118                  * need to turn off Level II oplocks if gpfs:leases is enabled
2119                  */
2120                 if (lp_level2_oplocks(SNUM(handle->conn))) {
2121                         DEBUG(5, ("gpfs:leases are enabled, disabling "
2122                                   "Level II oplocks\n"));
2123                         lp_do_parameter(SNUM(handle->conn), "level2 oplocks",
2124                                         "false");
2125                 }
2126         }
2127
2128         /*
2129          * Unless we have an async implementation of get_dos_attributes turn
2130          * this off.
2131          */
2132         lp_do_parameter(SNUM(handle->conn), "smbd async dosmode", "false");
2133
2134         return 0;
2135 }
2136
2137 static int get_gpfs_quota(const char *pathname, int type, int id,
2138                           struct gpfs_quotaInfo *qi)
2139 {
2140         int ret;
2141
2142         ret = gpfswrap_quotactl(pathname, GPFS_QCMD(Q_GETQUOTA, type), id, qi);
2143
2144         if (ret) {
2145                 if (errno == GPFS_E_NO_QUOTA_INST) {
2146                         DEBUG(10, ("Quotas disabled on GPFS filesystem.\n"));
2147                 } else if (errno != ENOSYS) {
2148                         DEBUG(0, ("Get quota failed, type %d, id, %d, "
2149                                   "errno %d.\n", type, id, errno));
2150                 }
2151
2152                 return ret;
2153         }
2154
2155         DEBUG(10, ("quota type %d, id %d, blk u:%lld h:%lld s:%lld gt:%u\n",
2156                    type, id, qi->blockUsage, qi->blockHardLimit,
2157                    qi->blockSoftLimit, qi->blockGraceTime));
2158
2159         return ret;
2160 }
2161
2162 static void vfs_gpfs_disk_free_quota(struct gpfs_quotaInfo qi, time_t cur_time,
2163                                      uint64_t *dfree, uint64_t *dsize)
2164 {
2165         uint64_t usage, limit;
2166
2167         /*
2168          * The quota reporting is done in units of 1024 byte blocks, but
2169          * sys_fsusage uses units of 512 byte blocks, adjust the block number
2170          * accordingly. Also filter possibly negative usage counts from gpfs.
2171          */
2172         usage = qi.blockUsage < 0 ? 0 : (uint64_t)qi.blockUsage * 2;
2173         limit = (uint64_t)qi.blockHardLimit * 2;
2174
2175         /*
2176          * When the grace time for the exceeded soft block quota has been
2177          * exceeded, the soft block quota becomes an additional hard limit.
2178          */
2179         if (qi.blockSoftLimit &&
2180             qi.blockGraceTime && cur_time > qi.blockGraceTime) {
2181                 /* report disk as full */
2182                 *dfree = 0;
2183                 *dsize = MIN(*dsize, usage);
2184         }
2185
2186         if (!qi.blockHardLimit)
2187                 return;
2188
2189         if (usage >= limit) {
2190                 /* report disk as full */
2191                 *dfree = 0;
2192                 *dsize = MIN(*dsize, usage);
2193
2194         } else {
2195                 /* limit has not been reached, determine "free space" */
2196                 *dfree = MIN(*dfree, limit - usage);
2197                 *dsize = MIN(*dsize, limit);
2198         }
2199 }
2200
2201 static uint64_t vfs_gpfs_disk_free(vfs_handle_struct *handle,
2202                                 const struct smb_filename *smb_fname,
2203                                 uint64_t *bsize,
2204                                 uint64_t *dfree,
2205                                 uint64_t *dsize)
2206 {
2207         struct security_unix_token *utok;
2208         struct gpfs_quotaInfo qi_user = { 0 }, qi_group = { 0 };
2209         struct gpfs_config_data *config;
2210         int err;
2211         time_t cur_time;
2212
2213         SMB_VFS_HANDLE_GET_DATA(handle, config, struct gpfs_config_data,
2214                                 return (uint64_t)-1);
2215         if (!config->dfreequota) {
2216                 return SMB_VFS_NEXT_DISK_FREE(handle, smb_fname,
2217                                               bsize, dfree, dsize);
2218         }
2219
2220         err = sys_fsusage(smb_fname->base_name, dfree, dsize);
2221         if (err) {
2222                 DEBUG (0, ("Could not get fs usage, errno %d\n", errno));
2223                 return SMB_VFS_NEXT_DISK_FREE(handle, smb_fname,
2224                                               bsize, dfree, dsize);
2225         }
2226
2227         /* sys_fsusage returns units of 512 bytes */
2228         *bsize = 512;
2229
2230         DEBUG(10, ("fs dfree %llu, dsize %llu\n",
2231                    (unsigned long long)*dfree, (unsigned long long)*dsize));
2232
2233         utok = handle->conn->session_info->unix_token;
2234
2235         err = get_gpfs_quota(smb_fname->base_name,
2236                         GPFS_USRQUOTA, utok->uid, &qi_user);
2237         if (err) {
2238                 return SMB_VFS_NEXT_DISK_FREE(handle, smb_fname,
2239                                               bsize, dfree, dsize);
2240         }
2241
2242         /*
2243          * If new files created under this folder get this folder's
2244          * GID, then available space is governed by the quota of the
2245          * folder's GID, not the primary group of the creating user.
2246          */
2247         if (VALID_STAT(smb_fname->st) &&
2248             S_ISDIR(smb_fname->st.st_ex_mode) &&
2249             smb_fname->st.st_ex_mode & S_ISGID) {
2250                 become_root();
2251                 err = get_gpfs_quota(smb_fname->base_name, GPFS_GRPQUOTA,
2252                                      smb_fname->st.st_ex_gid, &qi_group);
2253                 unbecome_root();
2254
2255         } else {
2256                 err = get_gpfs_quota(smb_fname->base_name, GPFS_GRPQUOTA,
2257                                      utok->gid, &qi_group);
2258         }
2259
2260         if (err) {
2261                 return SMB_VFS_NEXT_DISK_FREE(handle, smb_fname,
2262                                               bsize, dfree, dsize);
2263         }
2264
2265         cur_time = time(NULL);
2266
2267         /* Adjust free space and size according to quota limits. */
2268         vfs_gpfs_disk_free_quota(qi_user, cur_time, dfree, dsize);
2269         vfs_gpfs_disk_free_quota(qi_group, cur_time, dfree, dsize);
2270
2271         return *dfree / 2;
2272 }
2273
2274 static int vfs_gpfs_get_quota(vfs_handle_struct *handle,
2275                                 const struct smb_filename *smb_fname,
2276                                 enum SMB_QUOTA_TYPE qtype,
2277                                 unid_t id,
2278                                 SMB_DISK_QUOTA *dq)
2279 {
2280         switch(qtype) {
2281                 /*
2282                  * User/group quota are being used for disk-free
2283                  * determination, which in this module is done directly
2284                  * by the disk-free function. It's important that this
2285                  * module does not return wrong quota values by mistake,
2286                  * which would modify the correct values set by disk-free.
2287                  * User/group quota are also being used for processing
2288                  * NT_TRANSACT_GET_USER_QUOTA in smb1 protocol, which is
2289                  * currently not supported by this module.
2290                  */
2291                 case SMB_USER_QUOTA_TYPE:
2292                 case SMB_GROUP_QUOTA_TYPE:
2293                         errno = ENOSYS;
2294                         return -1;
2295                 default:
2296                         return SMB_VFS_NEXT_GET_QUOTA(handle, smb_fname,
2297                                         qtype, id, dq);
2298         }
2299 }
2300
2301 static uint32_t vfs_gpfs_capabilities(struct vfs_handle_struct *handle,
2302                                       enum timestamp_set_resolution *p_ts_res)
2303 {
2304         struct gpfs_config_data *config;
2305         uint32_t next;
2306
2307         next = SMB_VFS_NEXT_FS_CAPABILITIES(handle, p_ts_res);
2308
2309         SMB_VFS_HANDLE_GET_DATA(handle, config,
2310                                 struct gpfs_config_data,
2311                                 return next);
2312
2313         if (config->hsm) {
2314                 next |= FILE_SUPPORTS_REMOTE_STORAGE;
2315         }
2316         return next;
2317 }
2318
2319 static int vfs_gpfs_openat(struct vfs_handle_struct *handle,
2320                            const struct files_struct *dirfsp,
2321                            const struct smb_filename *smb_fname,
2322                            files_struct *fsp,
2323                            const struct vfs_open_how *_how)
2324 {
2325         struct vfs_open_how how = *_how;
2326         struct gpfs_config_data *config = NULL;
2327         struct gpfs_fsp_extension *ext = NULL;
2328         int ret;
2329
2330         SMB_VFS_HANDLE_GET_DATA(handle, config,
2331                                 struct gpfs_config_data,
2332                                 return -1);
2333
2334         if (config->hsm && !config->recalls &&
2335             !fsp->fsp_flags.is_pathref &&
2336             vfs_gpfs_fsp_is_offline(handle, fsp))
2337         {
2338                 DBG_DEBUG("Refusing access to offline file %s\n",
2339                           fsp_str_dbg(fsp));
2340                 errno = EACCES;
2341                 return -1;
2342         }
2343
2344         if (config->syncio) {
2345                 how.flags |= O_SYNC;
2346         }
2347
2348         ext = VFS_ADD_FSP_EXTENSION(handle, fsp, struct gpfs_fsp_extension,
2349                                     NULL);
2350         if (ext == NULL) {
2351                 errno = ENOMEM;
2352                 return -1;
2353         }
2354
2355         /*
2356          * Assume the file is offline until gpfs tells us it's online.
2357          */
2358         *ext = (struct gpfs_fsp_extension) { .offline = true };
2359
2360         ret = SMB_VFS_NEXT_OPENAT(handle, dirfsp, smb_fname, fsp, &how);
2361         if (ret == -1) {
2362                 VFS_REMOVE_FSP_EXTENSION(handle, fsp);
2363         }
2364         return ret;
2365 }
2366
2367 static ssize_t vfs_gpfs_pread(vfs_handle_struct *handle, files_struct *fsp,
2368                               void *data, size_t n, off_t offset)
2369 {
2370         ssize_t ret;
2371         bool was_offline;
2372
2373         was_offline = vfs_gpfs_fsp_is_offline(handle, fsp);
2374
2375         ret = SMB_VFS_NEXT_PREAD(handle, fsp, data, n, offset);
2376
2377         if ((ret != -1) && was_offline) {
2378                 notify_fname(handle->conn, NOTIFY_ACTION_MODIFIED,
2379                              FILE_NOTIFY_CHANGE_ATTRIBUTES,
2380                              fsp->fsp_name->base_name);
2381         }
2382
2383         return ret;
2384 }
2385
2386 struct vfs_gpfs_pread_state {
2387         struct files_struct *fsp;
2388         ssize_t ret;
2389         bool was_offline;
2390         struct vfs_aio_state vfs_aio_state;
2391 };
2392
2393 static void vfs_gpfs_pread_done(struct tevent_req *subreq);
2394
2395 static struct tevent_req *vfs_gpfs_pread_send(struct vfs_handle_struct *handle,
2396                                               TALLOC_CTX *mem_ctx,
2397                                               struct tevent_context *ev,
2398                                               struct files_struct *fsp,
2399                                               void *data, size_t n,
2400                                               off_t offset)
2401 {
2402         struct tevent_req *req, *subreq;
2403         struct vfs_gpfs_pread_state *state;
2404
2405         req = tevent_req_create(mem_ctx, &state, struct vfs_gpfs_pread_state);
2406         if (req == NULL) {
2407                 return NULL;
2408         }
2409         state->was_offline = vfs_gpfs_fsp_is_offline(handle, fsp);
2410         state->fsp = fsp;
2411         subreq = SMB_VFS_NEXT_PREAD_SEND(state, ev, handle, fsp, data,
2412                                          n, offset);
2413         if (tevent_req_nomem(subreq, req)) {
2414                 return tevent_req_post(req, ev);
2415         }
2416         tevent_req_set_callback(subreq, vfs_gpfs_pread_done, req);
2417         return req;
2418 }
2419
2420 static void vfs_gpfs_pread_done(struct tevent_req *subreq)
2421 {
2422         struct tevent_req *req = tevent_req_callback_data(
2423                 subreq, struct tevent_req);
2424         struct vfs_gpfs_pread_state *state = tevent_req_data(
2425                 req, struct vfs_gpfs_pread_state);
2426
2427         state->ret = SMB_VFS_PREAD_RECV(subreq, &state->vfs_aio_state);
2428         TALLOC_FREE(subreq);
2429         tevent_req_done(req);
2430 }
2431
2432 static ssize_t vfs_gpfs_pread_recv(struct tevent_req *req,
2433                                    struct vfs_aio_state *vfs_aio_state)
2434 {
2435         struct vfs_gpfs_pread_state *state = tevent_req_data(
2436                 req, struct vfs_gpfs_pread_state);
2437         struct files_struct *fsp = state->fsp;
2438
2439         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
2440                 return -1;
2441         }
2442         *vfs_aio_state = state->vfs_aio_state;
2443
2444         if ((state->ret != -1) && state->was_offline) {
2445                 DEBUG(10, ("sending notify\n"));
2446                 notify_fname(fsp->conn, NOTIFY_ACTION_MODIFIED,
2447                              FILE_NOTIFY_CHANGE_ATTRIBUTES,
2448                              fsp->fsp_name->base_name);
2449         }
2450
2451         return state->ret;
2452 }
2453
2454 static ssize_t vfs_gpfs_pwrite(vfs_handle_struct *handle, files_struct *fsp,
2455                                const void *data, size_t n, off_t offset)
2456 {
2457         ssize_t ret;
2458         bool was_offline;
2459
2460         was_offline = vfs_gpfs_fsp_is_offline(handle, fsp);
2461
2462         ret = SMB_VFS_NEXT_PWRITE(handle, fsp, data, n, offset);
2463
2464         if ((ret != -1) && was_offline) {
2465                 notify_fname(handle->conn, NOTIFY_ACTION_MODIFIED,
2466                              FILE_NOTIFY_CHANGE_ATTRIBUTES,
2467                              fsp->fsp_name->base_name);
2468         }
2469
2470         return ret;
2471 }
2472
2473 struct vfs_gpfs_pwrite_state {
2474         struct files_struct *fsp;
2475         ssize_t ret;
2476         bool was_offline;
2477         struct vfs_aio_state vfs_aio_state;
2478 };
2479
2480 static void vfs_gpfs_pwrite_done(struct tevent_req *subreq);
2481
2482 static struct tevent_req *vfs_gpfs_pwrite_send(
2483         struct vfs_handle_struct *handle,
2484         TALLOC_CTX *mem_ctx,
2485         struct tevent_context *ev,
2486         struct files_struct *fsp,
2487         const void *data, size_t n,
2488         off_t offset)
2489 {
2490         struct tevent_req *req, *subreq;
2491         struct vfs_gpfs_pwrite_state *state;
2492
2493         req = tevent_req_create(mem_ctx, &state, struct vfs_gpfs_pwrite_state);
2494         if (req == NULL) {
2495                 return NULL;
2496         }
2497         state->was_offline = vfs_gpfs_fsp_is_offline(handle, fsp);
2498         state->fsp = fsp;
2499         subreq = SMB_VFS_NEXT_PWRITE_SEND(state, ev, handle, fsp, data,
2500                                          n, offset);
2501         if (tevent_req_nomem(subreq, req)) {
2502                 return tevent_req_post(req, ev);
2503         }
2504         tevent_req_set_callback(subreq, vfs_gpfs_pwrite_done, req);
2505         return req;
2506 }
2507
2508 static void vfs_gpfs_pwrite_done(struct tevent_req *subreq)
2509 {
2510         struct tevent_req *req = tevent_req_callback_data(
2511                 subreq, struct tevent_req);
2512         struct vfs_gpfs_pwrite_state *state = tevent_req_data(
2513                 req, struct vfs_gpfs_pwrite_state);
2514
2515         state->ret = SMB_VFS_PWRITE_RECV(subreq, &state->vfs_aio_state);
2516         TALLOC_FREE(subreq);
2517         tevent_req_done(req);
2518 }
2519
2520 static ssize_t vfs_gpfs_pwrite_recv(struct tevent_req *req,
2521                                     struct vfs_aio_state *vfs_aio_state)
2522 {
2523         struct vfs_gpfs_pwrite_state *state = tevent_req_data(
2524                 req, struct vfs_gpfs_pwrite_state);
2525         struct files_struct *fsp = state->fsp;
2526
2527         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
2528                 return -1;
2529         }
2530         *vfs_aio_state = state->vfs_aio_state;
2531
2532         if ((state->ret != -1) && state->was_offline) {
2533                 DEBUG(10, ("sending notify\n"));
2534                 notify_fname(fsp->conn, NOTIFY_ACTION_MODIFIED,
2535                              FILE_NOTIFY_CHANGE_ATTRIBUTES,
2536                              fsp->fsp_name->base_name);
2537         }
2538
2539         return state->ret;
2540 }
2541
2542
2543 static struct vfs_fn_pointers vfs_gpfs_fns = {
2544         .connect_fn = vfs_gpfs_connect,
2545         .disk_free_fn = vfs_gpfs_disk_free,
2546         .get_quota_fn = vfs_gpfs_get_quota,
2547         .fs_capabilities_fn = vfs_gpfs_capabilities,
2548         .filesystem_sharemode_fn = vfs_gpfs_filesystem_sharemode,
2549         .linux_setlease_fn = vfs_gpfs_setlease,
2550         .get_real_filename_at_fn = vfs_gpfs_get_real_filename_at,
2551         .get_dos_attributes_send_fn = vfs_not_implemented_get_dos_attributes_send,
2552         .get_dos_attributes_recv_fn = vfs_not_implemented_get_dos_attributes_recv,
2553         .fget_dos_attributes_fn = vfs_gpfs_fget_dos_attributes,
2554         .fset_dos_attributes_fn = vfs_gpfs_fset_dos_attributes,
2555         .fget_nt_acl_fn = gpfsacl_fget_nt_acl,
2556         .fset_nt_acl_fn = gpfsacl_fset_nt_acl,
2557         .sys_acl_get_fd_fn = gpfsacl_sys_acl_get_fd,
2558         .sys_acl_blob_get_fd_fn = gpfsacl_sys_acl_blob_get_fd,
2559         .sys_acl_set_fd_fn = gpfsacl_sys_acl_set_fd,
2560         .sys_acl_delete_def_fd_fn = gpfsacl_sys_acl_delete_def_fd,
2561         .fchmod_fn = vfs_gpfs_fchmod,
2562         .close_fn = vfs_gpfs_close,
2563         .stat_fn = nfs4_acl_stat,
2564         .fstat_fn = nfs4_acl_fstat,
2565         .lstat_fn = vfs_gpfs_lstat,
2566         .fstatat_fn = vfs_gpfs_fstatat,
2567         .fntimes_fn = vfs_gpfs_fntimes,
2568         .aio_force_fn = vfs_gpfs_aio_force,
2569         .sendfile_fn = vfs_gpfs_sendfile,
2570         .fallocate_fn = vfs_gpfs_fallocate,
2571         .openat_fn = vfs_gpfs_openat,
2572         .pread_fn = vfs_gpfs_pread,
2573         .pread_send_fn = vfs_gpfs_pread_send,
2574         .pread_recv_fn = vfs_gpfs_pread_recv,
2575         .pwrite_fn = vfs_gpfs_pwrite,
2576         .pwrite_send_fn = vfs_gpfs_pwrite_send,
2577         .pwrite_recv_fn = vfs_gpfs_pwrite_recv,
2578         .ftruncate_fn = vfs_gpfs_ftruncate
2579 };
2580
2581 static_decl_vfs;
2582 NTSTATUS vfs_gpfs_init(TALLOC_CTX *ctx)
2583 {
2584         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "gpfs",
2585                                 &vfs_gpfs_fns);
2586 }