source4/ntvfs/cifs/vfs_cifs.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    CIFS-on-CIFS NTVFS filesystem backend
   5
   6    Copyright (C) Andrew Tridgell 2003
   7    Copyright (C) James J Myers 2003 <myersjj@samba.org>
   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   this implements a CIFS->CIFS NTVFS filesystem backend.
  24
  25 */
  26
  27 #include "includes.h"
  28 #include "libcli/raw/libcliraw.h"
  29 #include "libcli/raw/raw_proto.h"
  30 #include "libcli/smb_composite/smb_composite.h"
  31 #include "auth/auth.h"
  32 #include "auth/credentials/credentials.h"
  33 #include "ntvfs/ntvfs.h"
  34 #include "../lib/util/dlinklist.h"
  35 #include "param/param.h"
  36 #include "libcli/resolve/resolve.h"
  37 #include "../libcli/smb/smbXcli_base.h"
  38
  39 struct cvfs_file {
  40         struct cvfs_file *prev, *next;
  41         uint16_t fnum;
  42         struct ntvfs_handle *h;
  43 };
  44
  45 /* this is stored in ntvfs_private */
  46 struct cvfs_private {
  47         struct smbcli_tree *tree;
  48         struct smbcli_transport *transport;
  49         struct ntvfs_module_context *ntvfs;
  50         struct async_info *pending;
  51         struct cvfs_file *files;
  52         bool map_generic;
  53         bool map_trans2;
  54 };
  55
  56
  57 /* a structure used to pass information to an async handler */
  58 struct async_info {
  59         struct async_info *next, *prev;
  60         struct cvfs_private *cvfs;
  61         struct ntvfs_request *req;
  62         struct smbcli_request *c_req;
  63         struct cvfs_file *f;
  64         void *parms;
  65 };
  66
  67 NTSTATUS ntvfs_cifs_init(void);
  68
  69 #define CHECK_UPSTREAM_OPEN do { \
  70         if (!smbXcli_conn_is_connected(p->transport->conn)) { \
  71                 req->async_states->state|=NTVFS_ASYNC_STATE_CLOSE; \
  72                 return NT_STATUS_CONNECTION_DISCONNECTED; \
  73         } \
  74 } while(0)
  75
  76 #define SETUP_PID do { \
  77         p->tree->session->pid = req->smbpid; \
  78         CHECK_UPSTREAM_OPEN; \
  79 } while(0)
  80
  81 #define SETUP_FILE_HERE(f) do { \
  82         f = ntvfs_handle_get_backend_data(io->generic.in.file.ntvfs, ntvfs); \
  83         if (!f) return NT_STATUS_INVALID_HANDLE; \
  84         io->generic.in.file.fnum = f->fnum; \
  85 } while (0)
  86
  87 #define SETUP_FILE do { \
  88         struct cvfs_file *f; \
  89         SETUP_FILE_HERE(f); \
  90 } while (0)
  91
  92 #define SETUP_PID_AND_FILE do { \
  93         SETUP_PID; \
  94         SETUP_FILE; \
  95 } while (0)
  96
  97 #define CIFS_SERVER             "cifs:server"
  98 #define CIFS_USER               "cifs:user"
  99 #define CIFS_PASSWORD           "cifs:password"
 100 #define CIFS_DOMAIN             "cifs:domain"
 101 #define CIFS_SHARE              "cifs:share"
 102 #define CIFS_USE_MACHINE_ACCT   "cifs:use-machine-account"
 103 #define CIFS_USE_S4U2PROXY      "cifs:use-s4u2proxy"
 104 #define CIFS_MAP_GENERIC        "cifs:map-generic"
 105 #define CIFS_MAP_TRANS2         "cifs:map-trans2"
 106
 107 #define CIFS_USE_MACHINE_ACCT_DEFAULT   false
 108 #define CIFS_USE_S4U2PROXY_DEFAULT      false
 109 #define CIFS_MAP_GENERIC_DEFAULT        false
 110 #define CIFS_MAP_TRANS2_DEFAULT         true
 111
 112 /*
 113   a handler for oplock break events from the server - these need to be passed
 114   along to the client
 115  */
 116 static bool oplock_handler(struct smbcli_transport *transport, uint16_t tid, uint16_t fnum, uint8_t level, void *p_private)
 117 {
 118         struct cvfs_private *p = p_private;
 119         NTSTATUS status;
 120         struct ntvfs_handle *h = NULL;
 121         struct cvfs_file *f;
 122
 123         for (f=p->files; f; f=f->next) {
 124                 if (f->fnum != fnum) continue;
 125                 h = f->h;
 126                 break;
 127         }
 128
 129         if (!h) {
 130                 DEBUG(5,("vfs_cifs: ignoring oplock break level %d for fnum %d\n", level, fnum));
 131                 return true;
 132         }
 133
 134         DEBUG(5,("vfs_cifs: sending oplock break level %d for fnum %d\n", level, fnum));
 135         status = ntvfs_send_oplock_break(p->ntvfs, h, level);
 136         if (!NT_STATUS_IS_OK(status)) return false;
 137         return true;
 138 }
 139
 140 /*
 141   connect to a share - used when a tree_connect operation comes in.
 142 */
 143 static NTSTATUS cvfs_connect(struct ntvfs_module_context *ntvfs,
 144                              struct ntvfs_request *req,
 145                              union smb_tcon *tcon)
 146 {
 147         NTSTATUS status;
 148         struct cvfs_private *p;
 149         const char *host, *user, *pass, *domain, *remote_share;
 150         struct smb_composite_connect io;
 151         struct composite_context *creq;
 152         struct share_config *scfg = ntvfs->ctx->config;
 153
 154         struct cli_credentials *credentials;
 155         bool machine_account;
 156         bool s4u2proxy;
 157         const char* sharename;
 158         TALLOC_CTX *tmp_ctx;
 159
 160         tmp_ctx = talloc_new(req);
 161         if (tmp_ctx == NULL) {
 162                 return NT_STATUS_NO_MEMORY;
 163         }
 164
 165         switch (tcon->generic.level) {
 166         case RAW_TCON_TCON:
 167                 sharename = tcon->tcon.in.service;
 168                 break;
 169         case RAW_TCON_TCONX:
 170                 sharename = tcon->tconx.in.path;
 171                 break;
 172         case RAW_TCON_SMB2:
 173                 sharename = tcon->smb2.in.path;
 174                 break;
 175         default:
 176                 status = NT_STATUS_INVALID_LEVEL;
 177                 goto out;
 178         }
 179
 180         if (strncmp(sharename, "\\\\", 2) == 0) {
 181                 char *str = strchr(sharename+2, '\\');
 182                 if (str) {
 183                         sharename = str + 1;
 184                 }
 185         }
 186
 187         /* Here we need to determine which server to connect to.
 188          * For now we use parametric options, type cifs.
 189          */
 190         host = share_string_option(tmp_ctx, scfg, CIFS_SERVER, NULL);
 191         user = share_string_option(tmp_ctx, scfg, CIFS_USER, NULL);
 192         pass = share_string_option(tmp_ctx, scfg, CIFS_PASSWORD, NULL);
 193         domain = share_string_option(tmp_ctx, scfg, CIFS_DOMAIN, NULL);
 194         remote_share = share_string_option(tmp_ctx, scfg, CIFS_SHARE, NULL);
 195         if (!remote_share) {
 196                 remote_share = sharename;
 197         }
 198
 199         machine_account = share_bool_option(scfg, CIFS_USE_MACHINE_ACCT, CIFS_USE_MACHINE_ACCT_DEFAULT);
 200         s4u2proxy = share_bool_option(scfg, CIFS_USE_S4U2PROXY, CIFS_USE_S4U2PROXY_DEFAULT);
 201
 202         p = talloc_zero(ntvfs, struct cvfs_private);
 203         if (!p) {
 204                 status = NT_STATUS_NO_MEMORY;
 205                 goto out;
 206         }
 207
 208         ntvfs->private_data = p;
 209
 210         if (!host) {
 211                 DEBUG(1,("CIFS backend: You must supply server\n"));
 212                 status = NT_STATUS_INVALID_PARAMETER;
 213                 goto out;
 214         }
 215
 216         if (user && pass) {
 217                 DEBUG(5, ("CIFS backend: Using specified password\n"));
 218                 credentials = cli_credentials_init(p);
 219                 if (!credentials) {
 220                         status = NT_STATUS_NO_MEMORY;
 221                         goto out;
 222                 }
 223                 cli_credentials_set_conf(credentials, ntvfs->ctx->lp_ctx);
 224                 cli_credentials_set_username(credentials, user, CRED_SPECIFIED);
 225                 if (domain) {
 226                         cli_credentials_set_domain(credentials, domain, CRED_SPECIFIED);
 227                 }
 228                 cli_credentials_set_password(credentials, pass, CRED_SPECIFIED);
 229         } else if (machine_account) {
 230                 DEBUG(5, ("CIFS backend: Using machine account\n"));
 231                 credentials = cli_credentials_init(p);
 232                 cli_credentials_set_conf(credentials, ntvfs->ctx->lp_ctx);
 233                 if (domain) {
 234                         cli_credentials_set_domain(credentials, domain, CRED_SPECIFIED);
 235                 }
 236                 status = cli_credentials_set_machine_account(credentials, ntvfs->ctx->lp_ctx);
 237                 if (!NT_STATUS_IS_OK(status)) {
 238                         goto out;
 239                 }
 240         } else if (req->session_info->credentials) {
 241                 DEBUG(5, ("CIFS backend: Using delegated credentials\n"));
 242                 credentials = req->session_info->credentials;
 243         } else if (s4u2proxy) {
 244                 struct ccache_container *ccc = NULL;
 245                 const char *err_str = NULL;
 246                 int ret;
 247                 char *impersonate_principal;
 248                 char *self_service;
 249                 char *target_service;
 250
 251                 impersonate_principal = talloc_asprintf(req, "%s@%s",
 252                                                 req->session_info->info->account_name,
 253                                                 req->session_info->info->domain_name);
 254
 255                 self_service = talloc_asprintf(req, "cifs/%s",
 256                                                lpcfg_netbios_name(ntvfs->ctx->lp_ctx));
 257
 258                 target_service = talloc_asprintf(req, "cifs/%s", host);
 259
 260                 DEBUG(5, ("CIFS backend: Using S4U2Proxy credentials\n"));
 261
 262                 credentials = cli_credentials_init(p);
 263                 cli_credentials_set_conf(credentials, ntvfs->ctx->lp_ctx);
 264                 if (domain) {
 265                         cli_credentials_set_domain(credentials, domain, CRED_SPECIFIED);
 266                 }
 267                 status = cli_credentials_set_machine_account(credentials, ntvfs->ctx->lp_ctx);
 268                 if (!NT_STATUS_IS_OK(status)) {
 269                         goto out;
 270                 }
 271                 cli_credentials_invalidate_ccache(credentials, CRED_SPECIFIED);
 272                 cli_credentials_set_impersonate_principal(credentials,
 273                                                           impersonate_principal,
 274                                                           self_service);
 275                 cli_credentials_set_target_service(credentials, target_service);
 276                 ret = cli_credentials_get_ccache(credentials,
 277                                                  ntvfs->ctx->event_ctx,
 278                                                  ntvfs->ctx->lp_ctx,
 279                                                  &ccc,
 280                                                  &err_str);
 281                 if (ret != 0) {
 282                         status = NT_STATUS_CROSSREALM_DELEGATION_FAILURE;
 283                         DEBUG(1,("S4U2Proxy: cli_credentials_get_ccache() gave: ret[%d] str[%s] - %s\n",
 284                                 ret, err_str, nt_errstr(status)));
 285                         goto out;
 286                 }
 287
 288         } else {
 289                 DEBUG(1,("CIFS backend: NO delegated credentials found: You must supply server, user and password or the client must supply delegated credentials\n"));
 290                 status = NT_STATUS_INTERNAL_ERROR;
 291                 goto out;
 292         }
 293
 294         /* connect to the server, using the smbd event context */
 295         io.in.dest_host = host;
 296         io.in.dest_ports = lpcfg_smb_ports(ntvfs->ctx->lp_ctx);
 297         io.in.socket_options = lpcfg_socket_options(ntvfs->ctx->lp_ctx);
 298         io.in.called_name = host;
 299         io.in.credentials = credentials;
 300         io.in.fallback_to_anonymous = false;
 301         io.in.workgroup = lpcfg_workgroup(ntvfs->ctx->lp_ctx);
 302         io.in.service = remote_share;
 303         io.in.service_type = "?????";
 304         io.in.gensec_settings = lpcfg_gensec_settings(p, ntvfs->ctx->lp_ctx);
 305         lpcfg_smbcli_options(ntvfs->ctx->lp_ctx, &io.in.options);
 306         lpcfg_smbcli_session_options(ntvfs->ctx->lp_ctx, &io.in.session_options);
 307
 308         if (!(ntvfs->ctx->client_caps & NTVFS_CLIENT_CAP_LEVEL_II_OPLOCKS)) {
 309                 io.in.options.use_level2_oplocks = false;
 310         }
 311
 312         creq = smb_composite_connect_send(&io, p,
 313                                           lpcfg_resolve_context(ntvfs->ctx->lp_ctx),
 314                                           ntvfs->ctx->event_ctx);
 315         status = smb_composite_connect_recv(creq, p);
 316         if (!NT_STATUS_IS_OK(status)) {
 317                 goto out;
 318         }
 319
 320         p->tree = io.out.tree;
 321
 322         p->transport = p->tree->session->transport;
 323         SETUP_PID;
 324         p->ntvfs = ntvfs;
 325
 326         ntvfs->ctx->fs_type = talloc_strdup(ntvfs->ctx, "NTFS");
 327         if (ntvfs->ctx->fs_type == NULL) {
 328                 status = NT_STATUS_NO_MEMORY;
 329                 goto out;
 330         }
 331         ntvfs->ctx->dev_type = talloc_strdup(ntvfs->ctx, "A:");
 332         if (ntvfs->ctx->dev_type == NULL) {
 333                 status = NT_STATUS_NO_MEMORY;
 334                 goto out;
 335         }
 336
 337         if (tcon->generic.level == RAW_TCON_TCONX) {
 338                 tcon->tconx.out.fs_type = ntvfs->ctx->fs_type;
 339                 tcon->tconx.out.dev_type = ntvfs->ctx->dev_type;
 340         }
 341
 342         /* we need to receive oplock break requests from the server */
 343         smbcli_oplock_handler(p->transport, oplock_handler, p);
 344
 345         p->map_generic = share_bool_option(scfg, CIFS_MAP_GENERIC, CIFS_MAP_GENERIC_DEFAULT);
 346
 347         p->map_trans2 = share_bool_option(scfg, CIFS_MAP_TRANS2, CIFS_MAP_TRANS2_DEFAULT);
 348
 349         status = NT_STATUS_OK;
 350
 351 out:
 352         TALLOC_FREE(tmp_ctx);
 353         return status;
 354 }
 355
 356 /*
 357   disconnect from a share
 358 */
 359 static NTSTATUS cvfs_disconnect(struct ntvfs_module_context *ntvfs)
 360 {
 361         struct cvfs_private *p = ntvfs->private_data;
 362         struct async_info *a, *an;
 363
 364         /* first cleanup pending requests */
 365         for (a=p->pending; a; a = an) {
 366                 an = a->next;
 367                 smbcli_request_destroy(a->c_req);
 368                 talloc_free(a);
 369         }
 370
 371         talloc_free(p);
 372         ntvfs->private_data = NULL;
 373
 374         return NT_STATUS_OK;
 375 }
 376
 377 /*
 378   destroy an async info structure
 379 */
 380 static int async_info_destructor(struct async_info *async)
 381 {
 382         DLIST_REMOVE(async->cvfs->pending, async);
 383         return 0;
 384 }
 385
 386 /*
 387   a handler for simple async replies
 388   this handler can only be used for functions that don't return any
 389   parameters (those that just return a status code)
 390  */
 391 static void async_simple(struct smbcli_request *c_req)
 392 {
 393         struct async_info *async = c_req->async.private_data;
 394         struct ntvfs_request *req = async->req;
 395         req->async_states->status = smbcli_request_simple_recv(c_req);
 396         talloc_free(async);
 397         req->async_states->send_fn(req);
 398 }
 399
 400
 401 /* save some typing for the simple functions */
 402 #define ASYNC_RECV_TAIL_F(io, async_fn, file) do { \
 403         if (!c_req) return NT_STATUS_UNSUCCESSFUL; \
 404         { \
 405                 struct async_info *async; \
 406                 async = talloc(req, struct async_info); \
 407                 if (!async) return NT_STATUS_NO_MEMORY; \
 408                 async->parms = io; \
 409                 async->req = req; \
 410                 async->f = file; \
 411                 async->cvfs = p; \
 412                 async->c_req = c_req; \
 413                 DLIST_ADD(p->pending, async); \
 414                 c_req->async.private_data = async; \
 415                 talloc_set_destructor(async, async_info_destructor); \
 416         } \
 417         c_req->async.fn = async_fn; \
 418         req->async_states->state |= NTVFS_ASYNC_STATE_ASYNC; \
 419         return NT_STATUS_OK; \
 420 } while (0)
 421
 422 #define ASYNC_RECV_TAIL(io, async_fn) ASYNC_RECV_TAIL_F(io, async_fn, NULL)
 423
 424 #define SIMPLE_ASYNC_TAIL ASYNC_RECV_TAIL(NULL, async_simple)
 425
 426 /*
 427   delete a file - the dirtype specifies the file types to include in the search.
 428   The name can contain CIFS wildcards, but rarely does (except with OS/2 clients)
 429 */
 430 static NTSTATUS cvfs_unlink(struct ntvfs_module_context *ntvfs,
 431                             struct ntvfs_request *req, union smb_unlink *unl)
 432 {
 433         struct cvfs_private *p = ntvfs->private_data;
 434         struct smbcli_request *c_req;
 435
 436         SETUP_PID;
 437
 438         /* see if the front end will allow us to perform this
 439            function asynchronously.  */
 440         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 441                 return smb_raw_unlink(p->tree, unl);
 442         }
 443
 444         c_req = smb_raw_unlink_send(p->tree, unl);
 445
 446         SIMPLE_ASYNC_TAIL;
 447 }
 448
 449 /*
 450   a handler for async ioctl replies
 451  */
 452 static void async_ioctl(struct smbcli_request *c_req)
 453 {
 454         struct async_info *async = c_req->async.private_data;
 455         struct ntvfs_request *req = async->req;
 456         req->async_states->status = smb_raw_ioctl_recv(c_req, req, async->parms);
 457         talloc_free(async);
 458         req->async_states->send_fn(req);
 459 }
 460
 461 /*
 462   ioctl interface
 463 */
 464 static NTSTATUS cvfs_ioctl(struct ntvfs_module_context *ntvfs,
 465                            struct ntvfs_request *req, union smb_ioctl *io)
 466 {
 467         struct cvfs_private *p = ntvfs->private_data;
 468         struct smbcli_request *c_req;
 469
 470         SETUP_PID_AND_FILE;
 471
 472         /* see if the front end will allow us to perform this
 473            function asynchronously.  */
 474         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 475                 return smb_raw_ioctl(p->tree, req, io);
 476         }
 477
 478         c_req = smb_raw_ioctl_send(p->tree, io);
 479
 480         ASYNC_RECV_TAIL(io, async_ioctl);
 481 }
 482
 483 /*
 484   check if a directory exists
 485 */
 486 static NTSTATUS cvfs_chkpath(struct ntvfs_module_context *ntvfs,
 487                              struct ntvfs_request *req, union smb_chkpath *cp)
 488 {
 489         struct cvfs_private *p = ntvfs->private_data;
 490         struct smbcli_request *c_req;
 491
 492         SETUP_PID;
 493
 494         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 495                 return smb_raw_chkpath(p->tree, cp);
 496         }
 497
 498         c_req = smb_raw_chkpath_send(p->tree, cp);
 499
 500         SIMPLE_ASYNC_TAIL;
 501 }
 502
 503 /*
 504   a handler for async qpathinfo replies
 505  */
 506 static void async_qpathinfo(struct smbcli_request *c_req)
 507 {
 508         struct async_info *async = c_req->async.private_data;
 509         struct ntvfs_request *req = async->req;
 510         req->async_states->status = smb_raw_pathinfo_recv(c_req, req, async->parms);
 511         talloc_free(async);
 512         req->async_states->send_fn(req);
 513 }
 514
 515 /*
 516   return info on a pathname
 517 */
 518 static NTSTATUS cvfs_qpathinfo(struct ntvfs_module_context *ntvfs,
 519                                struct ntvfs_request *req, union smb_fileinfo *info)
 520 {
 521         struct cvfs_private *p = ntvfs->private_data;
 522         struct smbcli_request *c_req;
 523
 524         SETUP_PID;
 525
 526         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 527                 return smb_raw_pathinfo(p->tree, req, info);
 528         }
 529
 530         c_req = smb_raw_pathinfo_send(p->tree, info);
 531
 532         ASYNC_RECV_TAIL(info, async_qpathinfo);
 533 }
 534
 535 /*
 536   a handler for async qfileinfo replies
 537  */
 538 static void async_qfileinfo(struct smbcli_request *c_req)
 539 {
 540         struct async_info *async = c_req->async.private_data;
 541         struct ntvfs_request *req = async->req;
 542         req->async_states->status = smb_raw_fileinfo_recv(c_req, req, async->parms);
 543         talloc_free(async);
 544         req->async_states->send_fn(req);
 545 }
 546
 547 /*
 548   query info on a open file
 549 */
 550 static NTSTATUS cvfs_qfileinfo(struct ntvfs_module_context *ntvfs,
 551                                struct ntvfs_request *req, union smb_fileinfo *io)
 552 {
 553         struct cvfs_private *p = ntvfs->private_data;
 554         struct smbcli_request *c_req;
 555
 556         SETUP_PID_AND_FILE;
 557
 558         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 559                 return smb_raw_fileinfo(p->tree, req, io);
 560         }
 561
 562         c_req = smb_raw_fileinfo_send(p->tree, io);
 563
 564         ASYNC_RECV_TAIL(io, async_qfileinfo);
 565 }
 566
 567
 568 /*
 569   set info on a pathname
 570 */
 571 static NTSTATUS cvfs_setpathinfo(struct ntvfs_module_context *ntvfs,
 572                                  struct ntvfs_request *req, union smb_setfileinfo *st)
 573 {
 574         struct cvfs_private *p = ntvfs->private_data;
 575         struct smbcli_request *c_req;
 576
 577         SETUP_PID;
 578
 579         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 580                 return smb_raw_setpathinfo(p->tree, st);
 581         }
 582
 583         c_req = smb_raw_setpathinfo_send(p->tree, st);
 584
 585         SIMPLE_ASYNC_TAIL;
 586 }
 587
 588
 589 /*
 590   a handler for async open replies
 591  */
 592 static void async_open(struct smbcli_request *c_req)
 593 {
 594         struct async_info *async = c_req->async.private_data;
 595         struct cvfs_private *cvfs = async->cvfs;
 596         struct ntvfs_request *req = async->req;
 597         struct cvfs_file *f = async->f;
 598         union smb_open *io = async->parms;
 599         union smb_handle *file;
 600         talloc_free(async);
 601         req->async_states->status = smb_raw_open_recv(c_req, req, io);
 602         SMB_OPEN_OUT_FILE(io, file);
 603         f->fnum = file->fnum;
 604         file->ntvfs = NULL;
 605         if (!NT_STATUS_IS_OK(req->async_states->status)) goto failed;
 606         req->async_states->status = ntvfs_handle_set_backend_data(f->h, cvfs->ntvfs, f);
 607         if (!NT_STATUS_IS_OK(req->async_states->status)) goto failed;
 608         file->ntvfs = f->h;
 609         DLIST_ADD(cvfs->files, f);
 610 failed:
 611         req->async_states->send_fn(req);
 612 }
 613
 614 /*
 615   open a file
 616 */
 617 static NTSTATUS cvfs_open(struct ntvfs_module_context *ntvfs,
 618                           struct ntvfs_request *req, union smb_open *io)
 619 {
 620         struct cvfs_private *p = ntvfs->private_data;
 621         struct smbcli_request *c_req;
 622         struct ntvfs_handle *h;
 623         struct cvfs_file *f;
 624         NTSTATUS status;
 625
 626         SETUP_PID;
 627
 628         if (io->generic.level != RAW_OPEN_GENERIC &&
 629             p->map_generic) {
 630                 return ntvfs_map_open(ntvfs, req, io);
 631         }
 632
 633         status = ntvfs_handle_new(ntvfs, req, &h);
 634         NT_STATUS_NOT_OK_RETURN(status);
 635
 636         f = talloc_zero(h, struct cvfs_file);
 637         NT_STATUS_HAVE_NO_MEMORY(f);
 638         f->h = h;
 639
 640         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 641                 union smb_handle *file;
 642
 643                 status = smb_raw_open(p->tree, req, io);
 644                 NT_STATUS_NOT_OK_RETURN(status);
 645
 646                 SMB_OPEN_OUT_FILE(io, file);
 647                 f->fnum = file->fnum;
 648                 file->ntvfs = NULL;
 649                 status = ntvfs_handle_set_backend_data(f->h, p->ntvfs, f);
 650                 NT_STATUS_NOT_OK_RETURN(status);
 651                 file->ntvfs = f->h;
 652                 DLIST_ADD(p->files, f);
 653
 654                 return NT_STATUS_OK;
 655         }
 656
 657         c_req = smb_raw_open_send(p->tree, io);
 658
 659         ASYNC_RECV_TAIL_F(io, async_open, f);
 660 }
 661
 662 /*
 663   create a directory
 664 */
 665 static NTSTATUS cvfs_mkdir(struct ntvfs_module_context *ntvfs,
 666                            struct ntvfs_request *req, union smb_mkdir *md)
 667 {
 668         struct cvfs_private *p = ntvfs->private_data;
 669         struct smbcli_request *c_req;
 670
 671         SETUP_PID;
 672
 673         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 674                 return smb_raw_mkdir(p->tree, md);
 675         }
 676
 677         c_req = smb_raw_mkdir_send(p->tree, md);
 678
 679         SIMPLE_ASYNC_TAIL;
 680 }
 681
 682 /*
 683   remove a directory
 684 */
 685 static NTSTATUS cvfs_rmdir(struct ntvfs_module_context *ntvfs,
 686                            struct ntvfs_request *req, struct smb_rmdir *rd)
 687 {
 688         struct cvfs_private *p = ntvfs->private_data;
 689         struct smbcli_request *c_req;
 690
 691         SETUP_PID;
 692
 693         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 694                 return smb_raw_rmdir(p->tree, rd);
 695         }
 696         c_req = smb_raw_rmdir_send(p->tree, rd);
 697
 698         SIMPLE_ASYNC_TAIL;
 699 }
 700
 701 /*
 702   rename a set of files
 703 */
 704 static NTSTATUS cvfs_rename(struct ntvfs_module_context *ntvfs,
 705                             struct ntvfs_request *req, union smb_rename *ren)
 706 {
 707         struct cvfs_private *p = ntvfs->private_data;
 708         struct smbcli_request *c_req;
 709
 710         SETUP_PID;
 711
 712         if (ren->nttrans.level == RAW_RENAME_NTTRANS) {
 713                 struct cvfs_file *f;
 714                 f = ntvfs_handle_get_backend_data(ren->nttrans.in.file.ntvfs, ntvfs);
 715                 if (!f) return NT_STATUS_INVALID_HANDLE;
 716                 ren->nttrans.in.file.fnum = f->fnum;
 717         }
 718
 719         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 720                 return smb_raw_rename(p->tree, ren);
 721         }
 722
 723         c_req = smb_raw_rename_send(p->tree, ren);
 724
 725         SIMPLE_ASYNC_TAIL;
 726 }
 727
 728 /*
 729   copy a set of files
 730 */
 731 static NTSTATUS cvfs_copy(struct ntvfs_module_context *ntvfs,
 732                           struct ntvfs_request *req, struct smb_copy *cp)
 733 {
 734         return NT_STATUS_NOT_SUPPORTED;
 735 }
 736
 737 /*
 738   a handler for async read replies
 739  */
 740 static void async_read(struct smbcli_request *c_req)
 741 {
 742         struct async_info *async = c_req->async.private_data;
 743         struct ntvfs_request *req = async->req;
 744         req->async_states->status = smb_raw_read_recv(c_req, async->parms);
 745         talloc_free(async);
 746         req->async_states->send_fn(req);
 747 }
 748
 749 /*
 750   read from a file
 751 */
 752 static NTSTATUS cvfs_read(struct ntvfs_module_context *ntvfs,
 753                           struct ntvfs_request *req, union smb_read *io)
 754 {
 755         struct cvfs_private *p = ntvfs->private_data;
 756         struct smbcli_request *c_req;
 757
 758         SETUP_PID;
 759
 760         if (io->generic.level != RAW_READ_GENERIC &&
 761             p->map_generic) {
 762                 return ntvfs_map_read(ntvfs, req, io);
 763         }
 764
 765         SETUP_FILE;
 766
 767         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 768                 return smb_raw_read(p->tree, io);
 769         }
 770
 771         c_req = smb_raw_read_send(p->tree, io);
 772
 773         ASYNC_RECV_TAIL(io, async_read);
 774 }
 775
 776 /*
 777   a handler for async write replies
 778  */
 779 static void async_write(struct smbcli_request *c_req)
 780 {
 781         struct async_info *async = c_req->async.private_data;
 782         struct ntvfs_request *req = async->req;
 783         req->async_states->status = smb_raw_write_recv(c_req, async->parms);
 784         talloc_free(async);
 785         req->async_states->send_fn(req);
 786 }
 787
 788 /*
 789   write to a file
 790 */
 791 static NTSTATUS cvfs_write(struct ntvfs_module_context *ntvfs,
 792                            struct ntvfs_request *req, union smb_write *io)
 793 {
 794         struct cvfs_private *p = ntvfs->private_data;
 795         struct smbcli_request *c_req;
 796
 797         SETUP_PID;
 798
 799         if (io->generic.level != RAW_WRITE_GENERIC &&
 800             p->map_generic) {
 801                 return ntvfs_map_write(ntvfs, req, io);
 802         }
 803         SETUP_FILE;
 804
 805         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 806                 return smb_raw_write(p->tree, io);
 807         }
 808
 809         c_req = smb_raw_write_send(p->tree, io);
 810
 811         ASYNC_RECV_TAIL(io, async_write);
 812 }
 813
 814 /*
 815   a handler for async seek replies
 816  */
 817 static void async_seek(struct smbcli_request *c_req)
 818 {
 819         struct async_info *async = c_req->async.private_data;
 820         struct ntvfs_request *req = async->req;
 821         req->async_states->status = smb_raw_seek_recv(c_req, async->parms);
 822         talloc_free(async);
 823         req->async_states->send_fn(req);
 824 }
 825
 826 /*
 827   seek in a file
 828 */
 829 static NTSTATUS cvfs_seek(struct ntvfs_module_context *ntvfs,
 830                           struct ntvfs_request *req,
 831                           union smb_seek *io)
 832 {
 833         struct cvfs_private *p = ntvfs->private_data;
 834         struct smbcli_request *c_req;
 835
 836         SETUP_PID_AND_FILE;
 837
 838         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 839                 return smb_raw_seek(p->tree, io);
 840         }
 841
 842         c_req = smb_raw_seek_send(p->tree, io);
 843
 844         ASYNC_RECV_TAIL(io, async_seek);
 845 }
 846
 847 /*
 848   flush a file
 849 */
 850 static NTSTATUS cvfs_flush(struct ntvfs_module_context *ntvfs,
 851                            struct ntvfs_request *req,
 852                            union smb_flush *io)
 853 {
 854         struct cvfs_private *p = ntvfs->private_data;
 855         struct smbcli_request *c_req;
 856
 857         SETUP_PID;
 858         switch (io->generic.level) {
 859         case RAW_FLUSH_FLUSH:
 860                 SETUP_FILE;
 861                 break;
 862         case RAW_FLUSH_ALL:
 863                 io->generic.in.file.fnum = 0xFFFF;
 864                 break;
 865         case RAW_FLUSH_SMB2:
 866                 return NT_STATUS_INVALID_LEVEL;
 867         }
 868
 869         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 870                 return smb_raw_flush(p->tree, io);
 871         }
 872
 873         c_req = smb_raw_flush_send(p->tree, io);
 874
 875         SIMPLE_ASYNC_TAIL;
 876 }
 877
 878 /*
 879   close a file
 880 */
 881 static NTSTATUS cvfs_close(struct ntvfs_module_context *ntvfs,
 882                            struct ntvfs_request *req, union smb_close *io)
 883 {
 884         struct cvfs_private *p = ntvfs->private_data;
 885         struct smbcli_request *c_req;
 886         struct cvfs_file *f;
 887         union smb_close io2;
 888
 889         SETUP_PID;
 890
 891         if (io->generic.level != RAW_CLOSE_GENERIC &&
 892             p->map_generic) {
 893                 return ntvfs_map_close(ntvfs, req, io);
 894         }
 895
 896         if (io->generic.level == RAW_CLOSE_GENERIC) {
 897                 ZERO_STRUCT(io2);
 898                 io2.close.level = RAW_CLOSE_CLOSE;
 899                 io2.close.in.file = io->generic.in.file;
 900                 io2.close.in.write_time = io->generic.in.write_time;
 901                 io = &io2;
 902         }
 903
 904         SETUP_FILE_HERE(f);
 905         /* Note, we aren't free-ing f, or it's h here. Should we?
 906            even if file-close fails, we'll remove it from the list,
 907            what else would we do? Maybe we should not remove until
 908            after the proxied call completes? */
 909         DLIST_REMOVE(p->files, f);
 910
 911         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 912                 return smb_raw_close(p->tree, io);
 913         }
 914
 915         c_req = smb_raw_close_send(p->tree, io);
 916
 917         SIMPLE_ASYNC_TAIL;
 918 }
 919
 920 /*
 921   exit - closing files open by the pid
 922 */
 923 static NTSTATUS cvfs_exit(struct ntvfs_module_context *ntvfs,
 924                           struct ntvfs_request *req)
 925 {
 926         struct cvfs_private *p = ntvfs->private_data;
 927         struct smbcli_request *c_req;
 928
 929         SETUP_PID;
 930
 931         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 932                 return smb_raw_exit(p->tree->session);
 933         }
 934
 935         c_req = smb_raw_exit_send(p->tree->session);
 936
 937         SIMPLE_ASYNC_TAIL;
 938 }
 939
 940 /*
 941   logoff - closing files open by the user
 942 */
 943 static NTSTATUS cvfs_logoff(struct ntvfs_module_context *ntvfs,
 944                             struct ntvfs_request *req)
 945 {
 946         /* we can't do this right in the cifs backend .... */
 947         return NT_STATUS_OK;
 948 }
 949
 950 /*
 951   setup for an async call - nothing to do yet
 952 */
 953 static NTSTATUS cvfs_async_setup(struct ntvfs_module_context *ntvfs,
 954                                  struct ntvfs_request *req,
 955                                  void *private_data)
 956 {
 957         return NT_STATUS_OK;
 958 }
 959
 960 /*
 961   cancel an async call
 962 */
 963 static NTSTATUS cvfs_cancel(struct ntvfs_module_context *ntvfs,
 964                             struct ntvfs_request *req)
 965 {
 966         struct cvfs_private *p = ntvfs->private_data;
 967         struct async_info *a;
 968
 969         /* find the matching request */
 970         for (a=p->pending;a;a=a->next) {
 971                 if (a->req == req) {
 972                         break;
 973                 }
 974         }
 975
 976         if (a == NULL) {
 977                 return NT_STATUS_INVALID_PARAMETER;
 978         }
 979
 980         return smb_raw_ntcancel(a->c_req);
 981 }
 982
 983 /*
 984   lock a byte range
 985 */
 986 static NTSTATUS cvfs_lock(struct ntvfs_module_context *ntvfs,
 987                           struct ntvfs_request *req, union smb_lock *io)
 988 {
 989         struct cvfs_private *p = ntvfs->private_data;
 990         struct smbcli_request *c_req;
 991
 992         SETUP_PID;
 993
 994         if (io->generic.level != RAW_LOCK_GENERIC &&
 995             p->map_generic) {
 996                 return ntvfs_map_lock(ntvfs, req, io);
 997         }
 998         SETUP_FILE;
 999
1000         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
1001                 return smb_raw_lock(p->tree, io);
1002         }
1003
1004         c_req = smb_raw_lock_send(p->tree, io);
1005         SIMPLE_ASYNC_TAIL;
1006 }
1007
1008 /*
1009   set info on a open file
1010 */
1011 static NTSTATUS cvfs_setfileinfo(struct ntvfs_module_context *ntvfs,
1012                                  struct ntvfs_request *req,
1013                                  union smb_setfileinfo *io)
1014 {
1015         struct cvfs_private *p = ntvfs->private_data;
1016         struct smbcli_request *c_req;
1017
1018         SETUP_PID_AND_FILE;
1019
1020         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
1021                 return smb_raw_setfileinfo(p->tree, io);
1022         }
1023         c_req = smb_raw_setfileinfo_send(p->tree, io);
1024
1025         SIMPLE_ASYNC_TAIL;
1026 }
1027
1028
1029 /*
1030   a handler for async fsinfo replies
1031  */
1032 static void async_fsinfo(struct smbcli_request *c_req)
1033 {
1034         struct async_info *async = c_req->async.private_data;
1035         struct ntvfs_request *req = async->req;
1036         req->async_states->status = smb_raw_fsinfo_recv(c_req, req, async->parms);
1037         talloc_free(async);
1038         req->async_states->send_fn(req);
1039 }
1040
1041 /*
1042   return filesystem space info
1043 */
1044 static NTSTATUS cvfs_fsinfo(struct ntvfs_module_context *ntvfs,
1045                             struct ntvfs_request *req, union smb_fsinfo *fs)
1046 {
1047         struct cvfs_private *p = ntvfs->private_data;
1048         struct smbcli_request *c_req;
1049
1050         SETUP_PID;
1051
1052         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
1053                 return smb_raw_fsinfo(p->tree, req, fs);
1054         }
1055
1056         c_req = smb_raw_fsinfo_send(p->tree, req, fs);
1057
1058         ASYNC_RECV_TAIL(fs, async_fsinfo);
1059 }
1060
1061 /*
1062   return print queue info
1063 */
1064 static NTSTATUS cvfs_lpq(struct ntvfs_module_context *ntvfs,
1065                          struct ntvfs_request *req, union smb_lpq *lpq)
1066 {
1067         return NT_STATUS_NOT_SUPPORTED;
1068 }
1069
1070 /*
1071    list files in a directory matching a wildcard pattern
1072 */
1073 static NTSTATUS cvfs_search_first(struct ntvfs_module_context *ntvfs,
1074                                   struct ntvfs_request *req, union smb_search_first *io,
1075                                   void *search_private,
1076                                   bool (*callback)(void *, const union smb_search_data *))
1077 {
1078         struct cvfs_private *p = ntvfs->private_data;
1079
1080         SETUP_PID;
1081
1082         return smb_raw_search_first(p->tree, req, io, search_private, callback);
1083 }
1084
1085 /* continue a search */
1086 static NTSTATUS cvfs_search_next(struct ntvfs_module_context *ntvfs,
1087                                  struct ntvfs_request *req, union smb_search_next *io,
1088                                  void *search_private,
1089                                  bool (*callback)(void *, const union smb_search_data *))
1090 {
1091         struct cvfs_private *p = ntvfs->private_data;
1092
1093         SETUP_PID;
1094
1095         return smb_raw_search_next(p->tree, req, io, search_private, callback);
1096 }
1097
1098 /* close a search */
1099 static NTSTATUS cvfs_search_close(struct ntvfs_module_context *ntvfs,
1100                                   struct ntvfs_request *req, union smb_search_close *io)
1101 {
1102         struct cvfs_private *p = ntvfs->private_data;
1103
1104         SETUP_PID;
1105
1106         return smb_raw_search_close(p->tree, io);
1107 }
1108
1109 /*
1110   a handler for async trans2 replies
1111  */
1112 static void async_trans2(struct smbcli_request *c_req)
1113 {
1114         struct async_info *async = c_req->async.private_data;
1115         struct ntvfs_request *req = async->req;
1116         req->async_states->status = smb_raw_trans2_recv(c_req, req, async->parms);
1117         talloc_free(async);
1118         req->async_states->send_fn(req);
1119 }
1120
1121 /* raw trans2 */
1122 static NTSTATUS cvfs_trans2(struct ntvfs_module_context *ntvfs,
1123                             struct ntvfs_request *req,
1124                             struct smb_trans2 *trans2)
1125 {
1126         struct cvfs_private *p = ntvfs->private_data;
1127         struct smbcli_request *c_req;
1128
1129         if (p->map_trans2) {
1130                 return NT_STATUS_NOT_IMPLEMENTED;
1131         }
1132
1133         SETUP_PID;
1134
1135         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
1136                 return smb_raw_trans2(p->tree, req, trans2);
1137         }
1138
1139         c_req = smb_raw_trans2_send(p->tree, trans2);
1140
1141         ASYNC_RECV_TAIL(trans2, async_trans2);
1142 }
1143
1144
1145 /* SMBtrans - not used on file shares */
1146 static NTSTATUS cvfs_trans(struct ntvfs_module_context *ntvfs,
1147                            struct ntvfs_request *req,
1148                            struct smb_trans2 *trans2)
1149 {
1150         return NT_STATUS_ACCESS_DENIED;
1151 }
1152
1153 /*
1154   a handler for async change notify replies
1155  */
1156 static void async_changenotify(struct smbcli_request *c_req)
1157 {
1158         struct async_info *async = c_req->async.private_data;
1159         struct ntvfs_request *req = async->req;
1160         req->async_states->status = smb_raw_changenotify_recv(c_req, req, async->parms);
1161         talloc_free(async);
1162         req->async_states->send_fn(req);
1163 }
1164
1165 /* change notify request - always async */
1166 static NTSTATUS cvfs_notify(struct ntvfs_module_context *ntvfs,
1167                             struct ntvfs_request *req,
1168                             union smb_notify *io)
1169 {
1170         struct cvfs_private *p = ntvfs->private_data;
1171         struct smbcli_request *c_req;
1172         int saved_timeout = p->transport->options.request_timeout;
1173         struct cvfs_file *f;
1174
1175         if (io->nttrans.level != RAW_NOTIFY_NTTRANS) {
1176                 return NT_STATUS_NOT_IMPLEMENTED;
1177         }
1178
1179         SETUP_PID;
1180
1181         f = ntvfs_handle_get_backend_data(io->nttrans.in.file.ntvfs, ntvfs);
1182         if (!f) return NT_STATUS_INVALID_HANDLE;
1183         io->nttrans.in.file.fnum = f->fnum;
1184
1185         /* this request doesn't make sense unless its async */
1186         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
1187                 return NT_STATUS_INVALID_PARAMETER;
1188         }
1189
1190         /* we must not timeout on notify requests - they wait
1191            forever */
1192         p->transport->options.request_timeout = 0;
1193
1194         c_req = smb_raw_changenotify_send(p->tree, io);
1195
1196         p->transport->options.request_timeout = saved_timeout;
1197
1198         ASYNC_RECV_TAIL(io, async_changenotify);
1199 }
1200
1201 /*
1202   initialise the CIFS->CIFS backend, registering ourselves with the ntvfs subsystem
1203  */
1204 NTSTATUS ntvfs_cifs_init(void)
1205 {
1206         NTSTATUS ret;
1207         struct ntvfs_ops ops;
1208         NTVFS_CURRENT_CRITICAL_SIZES(vers);
1209
1210         ZERO_STRUCT(ops);
1211
1212         /* fill in the name and type */
1213         ops.name = "cifs";
1214         ops.type = NTVFS_DISK;
1215
1216         /* fill in all the operations */
1217         ops.connect_fn = cvfs_connect;
1218         ops.disconnect_fn = cvfs_disconnect;
1219         ops.unlink_fn = cvfs_unlink;
1220         ops.chkpath_fn = cvfs_chkpath;
1221         ops.qpathinfo_fn = cvfs_qpathinfo;
1222         ops.setpathinfo_fn = cvfs_setpathinfo;
1223         ops.open_fn = cvfs_open;
1224         ops.mkdir_fn = cvfs_mkdir;
1225         ops.rmdir_fn = cvfs_rmdir;
1226         ops.rename_fn = cvfs_rename;
1227         ops.copy_fn = cvfs_copy;
1228         ops.ioctl_fn = cvfs_ioctl;
1229         ops.read_fn = cvfs_read;
1230         ops.write_fn = cvfs_write;
1231         ops.seek_fn = cvfs_seek;
1232         ops.flush_fn = cvfs_flush;
1233         ops.close_fn = cvfs_close;
1234         ops.exit_fn = cvfs_exit;
1235         ops.lock_fn = cvfs_lock;
1236         ops.setfileinfo_fn = cvfs_setfileinfo;
1237         ops.qfileinfo_fn = cvfs_qfileinfo;
1238         ops.fsinfo_fn = cvfs_fsinfo;
1239         ops.lpq_fn = cvfs_lpq;
1240         ops.search_first_fn = cvfs_search_first;
1241         ops.search_next_fn = cvfs_search_next;
1242         ops.search_close_fn = cvfs_search_close;
1243         ops.trans_fn = cvfs_trans;
1244         ops.logoff_fn = cvfs_logoff;
1245         ops.async_setup_fn = cvfs_async_setup;
1246         ops.cancel_fn = cvfs_cancel;
1247         ops.notify_fn = cvfs_notify;
1248         ops.trans2_fn = cvfs_trans2;
1249
1250         /* register ourselves with the NTVFS subsystem. We register
1251            under the name 'cifs'. */
1252         ret = ntvfs_register(&ops, &vers);
1253
1254         if (!NT_STATUS_IS_OK(ret)) {
1255                 DEBUG(0,("Failed to register CIFS backend!\n"));
1256         }
1257
1258         return ret;
1259 }