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