source4/ntvfs/proxy/vfs_proxy.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
  38 struct cvfs_file {
  39         struct cvfs_file *prev, *next;
  40         uint16_t fnum;
  41         struct ntvfs_handle *h;
  42 };
  43
  44 /* this is stored in ntvfs_private */
  45 struct cvfs_private {
  46         struct smbcli_tree *tree;
  47         struct smbcli_transport *transport;
  48         struct ntvfs_module_context *ntvfs;
  49         struct async_info *pending;
  50         struct cvfs_file *files;
  51         bool map_generic;
  52         bool map_trans2;
  53 };
  54
  55
  56 /* a structure used to pass information to an async handler */
  57 struct async_info {
  58         struct async_info *next, *prev;
  59         struct cvfs_private *cvfs;
  60         struct ntvfs_request *req;
  61         struct smbcli_request *c_req;
  62         struct cvfs_file *f;
  63         void *parms;
  64 };
  65
  66 #define SETUP_PID private->tree->session->pid = req->smbpid
  67
  68 #define SETUP_FILE_HERE(f) do { \
  69         f = ntvfs_handle_get_backend_data(io->generic.in.file.ntvfs, ntvfs); \
  70         if (!f) return NT_STATUS_INVALID_HANDLE; \
  71         io->generic.in.file.fnum = f->fnum; \
  72 } while (0)
  73
  74 #define SETUP_FILE do { \
  75         struct cvfs_file *f; \
  76         SETUP_FILE_HERE(f); \
  77 } while (0)
  78
  79 #define SETUP_PID_AND_FILE do { \
  80         SETUP_PID; \
  81         SETUP_FILE; \
  82 } while (0)
  83
  84 #define CIFS_SERVER             "cifs:server"
  85 #define CIFS_USER               "cifs:user"
  86 #define CIFS_PASSWORD           "cifs:password"
  87 #define CIFS_DOMAIN             "cifs:domain"
  88 #define CIFS_SHARE              "cifs:share"
  89 #define CIFS_USE_MACHINE_ACCT   "cifs:use-machine-account"
  90 #define CIFS_MAP_GENERIC        "cifs:map-generic"
  91 #define CIFS_MAP_TRANS2         "cifs:map-trans2"
  92
  93 #define CIFS_USE_MACHINE_ACCT_DEFAULT   false
  94 #define CIFS_MAP_GENERIC_DEFAULT        false
  95 #define CIFS_MAP_TRANS2_DEFAULT         true
  96
  97 /*
  98   a handler for oplock break events from the server - these need to be passed
  99   along to the client
 100  */
 101 static bool oplock_handler(struct smbcli_transport *transport, uint16_t tid, uint16_t fnum, uint8_t level, void *p_private)
 102 {
 103         struct cvfs_private *private = p_private;
 104         NTSTATUS status;
 105         struct ntvfs_handle *h = NULL;
 106         struct cvfs_file *f;
 107
 108         for (f=private->files; f; f=f->next) {
 109                 if (f->fnum != fnum) continue;
 110                 h = f->h;
 111                 break;
 112         }
 113
 114         if (!h) {
 115                 DEBUG(5,("vfs_cifs: ignoring oplock break level %d for fnum %d\n", level, fnum));
 116                 return true;
 117         }
 118
 119         DEBUG(5,("vfs_cifs: sending oplock break level %d for fnum %d\n", level, fnum));
 120         status = ntvfs_send_oplock_break(private->ntvfs, h, level);
 121         if (!NT_STATUS_IS_OK(status)) return false;
 122         return true;
 123 }
 124
 125 /*
 126   connect to a share - used when a tree_connect operation comes in.
 127 */
 128 static NTSTATUS cvfs_connect(struct ntvfs_module_context *ntvfs,
 129                              struct ntvfs_request *req, const char *sharename)
 130 {
 131         NTSTATUS status;
 132         struct cvfs_private *private;
 133         const char *host, *user, *pass, *domain, *remote_share;
 134         struct smb_composite_connect io;
 135         struct composite_context *creq;
 136         struct share_config *scfg = ntvfs->ctx->config;
 137
 138         struct cli_credentials *credentials;
 139         bool machine_account;
 140
 141         /* Here we need to determine which server to connect to.
 142          * For now we use parametric options, type cifs.
 143          * Later we will use security=server and auth_server.c.
 144          */
 145         host = share_string_option(scfg, CIFS_SERVER, NULL);
 146         user = share_string_option(scfg, CIFS_USER, NULL);
 147         pass = share_string_option(scfg, CIFS_PASSWORD, NULL);
 148         domain = share_string_option(scfg, CIFS_DOMAIN, NULL);
 149         remote_share = share_string_option(scfg, CIFS_SHARE, NULL);
 150         if (!remote_share) {
 151                 remote_share = sharename;
 152         }
 153
 154         machine_account = share_bool_option(scfg, CIFS_USE_MACHINE_ACCT, CIFS_USE_MACHINE_ACCT_DEFAULT);
 155
 156         private = talloc_zero(ntvfs, struct cvfs_private);
 157         if (!private) {
 158                 return NT_STATUS_NO_MEMORY;
 159         }
 160
 161         ntvfs->private_data = private;
 162
 163         if (!host) {
 164                 DEBUG(1,("CIFS backend: You must supply server\n"));
 165                 return NT_STATUS_INVALID_PARAMETER;
 166         }
 167
 168         if (user && pass) {
 169                 DEBUG(5, ("CIFS backend: Using specified password\n"));
 170                 credentials = cli_credentials_init(private);
 171                 if (!credentials) {
 172                         return NT_STATUS_NO_MEMORY;
 173                 }
 174                 cli_credentials_set_conf(credentials, ntvfs->ctx->lp_ctx);
 175                 cli_credentials_set_username(credentials, user, CRED_SPECIFIED);
 176                 if (domain) {
 177                         cli_credentials_set_domain(credentials, domain, CRED_SPECIFIED);
 178                 }
 179                 cli_credentials_set_password(credentials, pass, CRED_SPECIFIED);
 180         } else if (machine_account) {
 181                 DEBUG(5, ("CIFS backend: Using machine account\n"));
 182                 credentials = cli_credentials_init(private);
 183                 cli_credentials_set_conf(credentials, ntvfs->ctx->lp_ctx);
 184                 if (domain) {
 185                         cli_credentials_set_domain(credentials, domain, CRED_SPECIFIED);
 186                 }
 187                 status = cli_credentials_set_machine_account(credentials, ntvfs->ctx->lp_ctx);
 188                 if (!NT_STATUS_IS_OK(status)) {
 189                         return status;
 190                 }
 191         } else if (req->session_info->credentials) {
 192                 DEBUG(5, ("CIFS backend: Using delegated credentials\n"));
 193                 credentials = req->session_info->credentials;
 194         } else {
 195                 DEBUG(1,("CIFS backend: NO delegated credentials found: You must supply server, user and password or the client must supply delegated credentials\n"));
 196                 return NT_STATUS_INVALID_PARAMETER;
 197         }
 198
 199         /* connect to the server, using the smbd event context */
 200         io.in.dest_host = host;
 201         io.in.dest_ports = lp_smb_ports(ntvfs->ctx->lp_ctx);
 202         io.in.socket_options = lp_socket_options(ntvfs->ctx->lp_ctx);
 203         io.in.called_name = host;
 204         io.in.credentials = credentials;
 205         io.in.fallback_to_anonymous = false;
 206         io.in.workgroup = lp_workgroup(ntvfs->ctx->lp_ctx);
 207         io.in.service = remote_share;
 208         io.in.service_type = "?????";
 209         io.in.iconv_convenience = lp_iconv_convenience(ntvfs->ctx->lp_ctx);
 210         io.in.gensec_settings = lp_gensec_settings(private, ntvfs->ctx->lp_ctx);
 211         lp_smbcli_options(ntvfs->ctx->lp_ctx, &io.in.options);
 212         lp_smbcli_session_options(ntvfs->ctx->lp_ctx, &io.in.session_options);
 213
 214         if (!(ntvfs->ctx->client_caps & NTVFS_CLIENT_CAP_LEVEL_II_OPLOCKS)) {
 215                 io.in.options.use_level2_oplocks = false;
 216         }
 217
 218         creq = smb_composite_connect_send(&io, private,
 219                                           lp_resolve_context(ntvfs->ctx->lp_ctx),
 220                                           ntvfs->ctx->event_ctx);
 221         status = smb_composite_connect_recv(creq, private);
 222         NT_STATUS_NOT_OK_RETURN(status);
 223
 224         private->tree = io.out.tree;
 225
 226         private->transport = private->tree->session->transport;
 227         SETUP_PID;
 228         private->ntvfs = ntvfs;
 229
 230         ntvfs->ctx->fs_type = talloc_strdup(ntvfs->ctx, "NTFS");
 231         NT_STATUS_HAVE_NO_MEMORY(ntvfs->ctx->fs_type);
 232         ntvfs->ctx->dev_type = talloc_strdup(ntvfs->ctx, "A:");
 233         NT_STATUS_HAVE_NO_MEMORY(ntvfs->ctx->dev_type);
 234
 235         /* we need to receive oplock break requests from the server */
 236         smbcli_oplock_handler(private->transport, oplock_handler, private);
 237
 238         private->map_generic = share_bool_option(scfg, CIFS_MAP_GENERIC, CIFS_MAP_GENERIC_DEFAULT);
 239
 240         private->map_trans2 = share_bool_option(scfg, CIFS_MAP_TRANS2, CIFS_MAP_TRANS2_DEFAULT);
 241
 242         return NT_STATUS_OK;
 243 }
 244
 245 /*
 246   disconnect from a share
 247 */
 248 static NTSTATUS cvfs_disconnect(struct ntvfs_module_context *ntvfs)
 249 {
 250         struct cvfs_private *private = ntvfs->private_data;
 251         struct async_info *a, *an;
 252
 253         /* first cleanup pending requests */
 254         for (a=private->pending; a; a = an) {
 255                 an = a->next;
 256                 smbcli_request_destroy(a->c_req);
 257                 talloc_free(a);
 258         }
 259
 260         talloc_free(private);
 261         ntvfs->private_data = NULL;
 262
 263         return NT_STATUS_OK;
 264 }
 265
 266 /*
 267   destroy an async info structure
 268 */
 269 static int async_info_destructor(struct async_info *async)
 270 {
 271         DLIST_REMOVE(async->cvfs->pending, async);
 272         return 0;
 273 }
 274
 275 /*
 276   a handler for simple async replies
 277   this handler can only be used for functions that don't return any
 278   parameters (those that just return a status code)
 279  */
 280 static void async_simple(struct smbcli_request *c_req)
 281 {
 282         struct async_info *async = c_req->async.private;
 283         struct ntvfs_request *req = async->req;
 284         req->async_states->status = smbcli_request_simple_recv(c_req);
 285         talloc_free(async);
 286         req->async_states->send_fn(req);
 287 }
 288
 289
 290 /* save some typing for the simple functions */
 291 #define ASYNC_RECV_TAIL_F(io, async_fn, file) do { \
 292         if (!c_req) return NT_STATUS_UNSUCCESSFUL; \
 293         { \
 294                 struct async_info *async; \
 295                 async = talloc(req, struct async_info); \
 296                 if (!async) return NT_STATUS_NO_MEMORY; \
 297                 async->parms = io; \
 298                 async->req = req; \
 299                 async->f = file; \
 300                 async->cvfs = private; \
 301                 async->c_req = c_req; \
 302                 DLIST_ADD(private->pending, async); \
 303                 c_req->async.private = async; \
 304                 talloc_set_destructor(async, async_info_destructor); \
 305         } \
 306         c_req->async.fn = async_fn; \
 307         req->async_states->state |= NTVFS_ASYNC_STATE_ASYNC; \
 308         return NT_STATUS_OK; \
 309 } while (0)
 310
 311 #define ASYNC_RECV_TAIL(io, async_fn) ASYNC_RECV_TAIL_F(io, async_fn, NULL)
 312
 313 #define SIMPLE_ASYNC_TAIL ASYNC_RECV_TAIL(NULL, async_simple)
 314
 315 /*
 316   delete a file - the dirtype specifies the file types to include in the search.
 317   The name can contain CIFS wildcards, but rarely does (except with OS/2 clients)
 318 */
 319 static NTSTATUS cvfs_unlink(struct ntvfs_module_context *ntvfs,
 320                             struct ntvfs_request *req, union smb_unlink *unl)
 321 {
 322         struct cvfs_private *private = ntvfs->private_data;
 323         struct smbcli_request *c_req;
 324
 325         SETUP_PID;
 326
 327         /* see if the front end will allow us to perform this
 328            function asynchronously.  */
 329         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 330                 return smb_raw_unlink(private->tree, unl);
 331         }
 332
 333         c_req = smb_raw_unlink_send(private->tree, unl);
 334
 335         SIMPLE_ASYNC_TAIL;
 336 }
 337
 338 /*
 339   a handler for async ioctl replies
 340  */
 341 static void async_ioctl(struct smbcli_request *c_req)
 342 {
 343         struct async_info *async = c_req->async.private;
 344         struct ntvfs_request *req = async->req;
 345         req->async_states->status = smb_raw_ioctl_recv(c_req, req, async->parms);
 346         talloc_free(async);
 347         req->async_states->send_fn(req);
 348 }
 349
 350 /*
 351   ioctl interface
 352 */
 353 static NTSTATUS cvfs_ioctl(struct ntvfs_module_context *ntvfs,
 354                            struct ntvfs_request *req, union smb_ioctl *io)
 355 {
 356         struct cvfs_private *private = ntvfs->private_data;
 357         struct smbcli_request *c_req;
 358
 359         SETUP_PID_AND_FILE;
 360
 361         /* see if the front end will allow us to perform this
 362            function asynchronously.  */
 363         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 364                 return smb_raw_ioctl(private->tree, req, io);
 365         }
 366
 367         c_req = smb_raw_ioctl_send(private->tree, io);
 368
 369         ASYNC_RECV_TAIL(io, async_ioctl);
 370 }
 371
 372 /*
 373   check if a directory exists
 374 */
 375 static NTSTATUS cvfs_chkpath(struct ntvfs_module_context *ntvfs,
 376                              struct ntvfs_request *req, union smb_chkpath *cp)
 377 {
 378         struct cvfs_private *private = ntvfs->private_data;
 379         struct smbcli_request *c_req;
 380
 381         SETUP_PID;
 382
 383         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 384                 return smb_raw_chkpath(private->tree, cp);
 385         }
 386
 387         c_req = smb_raw_chkpath_send(private->tree, cp);
 388
 389         SIMPLE_ASYNC_TAIL;
 390 }
 391
 392 /*
 393   a handler for async qpathinfo replies
 394  */
 395 static void async_qpathinfo(struct smbcli_request *c_req)
 396 {
 397         struct async_info *async = c_req->async.private;
 398         struct ntvfs_request *req = async->req;
 399         req->async_states->status = smb_raw_pathinfo_recv(c_req, req, async->parms);
 400         talloc_free(async);
 401         req->async_states->send_fn(req);
 402 }
 403
 404 /*
 405   return info on a pathname
 406 */
 407 static NTSTATUS cvfs_qpathinfo(struct ntvfs_module_context *ntvfs,
 408                                struct ntvfs_request *req, union smb_fileinfo *info)
 409 {
 410         struct cvfs_private *private = ntvfs->private_data;
 411         struct smbcli_request *c_req;
 412
 413         SETUP_PID;
 414
 415         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 416                 return smb_raw_pathinfo(private->tree, req, info);
 417         }
 418
 419         c_req = smb_raw_pathinfo_send(private->tree, info);
 420
 421         ASYNC_RECV_TAIL(info, async_qpathinfo);
 422 }
 423
 424 /*
 425   a handler for async qfileinfo replies
 426  */
 427 static void async_qfileinfo(struct smbcli_request *c_req)
 428 {
 429         struct async_info *async = c_req->async.private;
 430         struct ntvfs_request *req = async->req;
 431         req->async_states->status = smb_raw_fileinfo_recv(c_req, req, async->parms);
 432         talloc_free(async);
 433         req->async_states->send_fn(req);
 434 }
 435
 436 /*
 437   query info on a open file
 438 */
 439 static NTSTATUS cvfs_qfileinfo(struct ntvfs_module_context *ntvfs,
 440                                struct ntvfs_request *req, union smb_fileinfo *io)
 441 {
 442         struct cvfs_private *private = ntvfs->private_data;
 443         struct smbcli_request *c_req;
 444
 445         SETUP_PID_AND_FILE;
 446
 447         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 448                 return smb_raw_fileinfo(private->tree, req, io);
 449         }
 450
 451         c_req = smb_raw_fileinfo_send(private->tree, io);
 452
 453         ASYNC_RECV_TAIL(io, async_qfileinfo);
 454 }
 455
 456
 457 /*
 458   set info on a pathname
 459 */
 460 static NTSTATUS cvfs_setpathinfo(struct ntvfs_module_context *ntvfs,
 461                                  struct ntvfs_request *req, union smb_setfileinfo *st)
 462 {
 463         struct cvfs_private *private = ntvfs->private_data;
 464         struct smbcli_request *c_req;
 465
 466         SETUP_PID;
 467
 468         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 469                 return smb_raw_setpathinfo(private->tree, st);
 470         }
 471
 472         c_req = smb_raw_setpathinfo_send(private->tree, st);
 473
 474         SIMPLE_ASYNC_TAIL;
 475 }
 476
 477
 478 /*
 479   a handler for async open replies
 480  */
 481 static void async_open(struct smbcli_request *c_req)
 482 {
 483         struct async_info *async = c_req->async.private;
 484         struct cvfs_private *cvfs = async->cvfs;
 485         struct ntvfs_request *req = async->req;
 486         struct cvfs_file *f = async->f;
 487         union smb_open *io = async->parms;
 488         union smb_handle *file;
 489         talloc_free(async);
 490         req->async_states->status = smb_raw_open_recv(c_req, req, io);
 491         SMB_OPEN_OUT_FILE(io, file);
 492         f->fnum = file->fnum;
 493         file->ntvfs = NULL;
 494         if (!NT_STATUS_IS_OK(req->async_states->status)) goto failed;
 495         req->async_states->status = ntvfs_handle_set_backend_data(f->h, cvfs->ntvfs, f);
 496         if (!NT_STATUS_IS_OK(req->async_states->status)) goto failed;
 497         file->ntvfs = f->h;
 498         DLIST_ADD(cvfs->files, f);
 499 failed:
 500         req->async_states->send_fn(req);
 501 }
 502
 503 /*
 504   open a file
 505 */
 506 static NTSTATUS cvfs_open(struct ntvfs_module_context *ntvfs,
 507                           struct ntvfs_request *req, union smb_open *io)
 508 {
 509         struct cvfs_private *private = ntvfs->private_data;
 510         struct smbcli_request *c_req;
 511         struct ntvfs_handle *h;
 512         struct cvfs_file *f;
 513         NTSTATUS status;
 514
 515         SETUP_PID;
 516
 517         if (io->generic.level != RAW_OPEN_GENERIC &&
 518             private->map_generic) {
 519                 return ntvfs_map_open(ntvfs, req, io);
 520         }
 521
 522         status = ntvfs_handle_new(ntvfs, req, &h);
 523         NT_STATUS_NOT_OK_RETURN(status);
 524
 525         f = talloc_zero(h, struct cvfs_file);
 526         NT_STATUS_HAVE_NO_MEMORY(f);
 527         f->h = h;
 528
 529         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 530                 union smb_handle *file;
 531
 532                 status = smb_raw_open(private->tree, req, io);
 533                 NT_STATUS_NOT_OK_RETURN(status);
 534
 535                 SMB_OPEN_OUT_FILE(io, file);
 536                 f->fnum = file->fnum;
 537                 file->ntvfs = NULL;
 538                 status = ntvfs_handle_set_backend_data(f->h, private->ntvfs, f);
 539                 NT_STATUS_NOT_OK_RETURN(status);
 540                 file->ntvfs = f->h;
 541                 DLIST_ADD(private->files, f);
 542
 543                 return NT_STATUS_OK;
 544         }
 545
 546         c_req = smb_raw_open_send(private->tree, io);
 547
 548         ASYNC_RECV_TAIL_F(io, async_open, f);
 549 }
 550
 551 /*
 552   create a directory
 553 */
 554 static NTSTATUS cvfs_mkdir(struct ntvfs_module_context *ntvfs,
 555                            struct ntvfs_request *req, union smb_mkdir *md)
 556 {
 557         struct cvfs_private *private = ntvfs->private_data;
 558         struct smbcli_request *c_req;
 559
 560         SETUP_PID;
 561
 562         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 563                 return smb_raw_mkdir(private->tree, md);
 564         }
 565
 566         c_req = smb_raw_mkdir_send(private->tree, md);
 567
 568         SIMPLE_ASYNC_TAIL;
 569 }
 570
 571 /*
 572   remove a directory
 573 */
 574 static NTSTATUS cvfs_rmdir(struct ntvfs_module_context *ntvfs,
 575                            struct ntvfs_request *req, struct smb_rmdir *rd)
 576 {
 577         struct cvfs_private *private = ntvfs->private_data;
 578         struct smbcli_request *c_req;
 579
 580         SETUP_PID;
 581
 582         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 583                 return smb_raw_rmdir(private->tree, rd);
 584         }
 585         c_req = smb_raw_rmdir_send(private->tree, rd);
 586
 587         SIMPLE_ASYNC_TAIL;
 588 }
 589
 590 /*
 591   rename a set of files
 592 */
 593 static NTSTATUS cvfs_rename(struct ntvfs_module_context *ntvfs,
 594                             struct ntvfs_request *req, union smb_rename *ren)
 595 {
 596         struct cvfs_private *private = ntvfs->private_data;
 597         struct smbcli_request *c_req;
 598
 599         SETUP_PID;
 600
 601         if (ren->nttrans.level == RAW_RENAME_NTTRANS) {
 602                 struct cvfs_file *f;
 603                 f = ntvfs_handle_get_backend_data(ren->nttrans.in.file.ntvfs, ntvfs);
 604                 if (!f) return NT_STATUS_INVALID_HANDLE;
 605                 ren->nttrans.in.file.fnum = f->fnum;
 606         }
 607
 608         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 609                 return smb_raw_rename(private->tree, ren);
 610         }
 611
 612         c_req = smb_raw_rename_send(private->tree, ren);
 613
 614         SIMPLE_ASYNC_TAIL;
 615 }
 616
 617 /*
 618   copy a set of files
 619 */
 620 static NTSTATUS cvfs_copy(struct ntvfs_module_context *ntvfs,
 621                           struct ntvfs_request *req, struct smb_copy *cp)
 622 {
 623         return NT_STATUS_NOT_SUPPORTED;
 624 }
 625
 626 /*
 627   a handler for async read replies
 628  */
 629 static void async_read(struct smbcli_request *c_req)
 630 {
 631         struct async_info *async = c_req->async.private;
 632         struct ntvfs_request *req = async->req;
 633         req->async_states->status = smb_raw_read_recv(c_req, async->parms);
 634         talloc_free(async);
 635         req->async_states->send_fn(req);
 636 }
 637
 638 /*
 639   read from a file
 640 */
 641 static NTSTATUS cvfs_read(struct ntvfs_module_context *ntvfs,
 642                           struct ntvfs_request *req, union smb_read *io)
 643 {
 644         struct cvfs_private *private = ntvfs->private_data;
 645         struct smbcli_request *c_req;
 646
 647         SETUP_PID;
 648
 649         if (io->generic.level != RAW_READ_GENERIC &&
 650             private->map_generic) {
 651                 return ntvfs_map_read(ntvfs, req, io);
 652         }
 653
 654         SETUP_FILE;
 655
 656         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 657                 return smb_raw_read(private->tree, io);
 658         }
 659
 660         c_req = smb_raw_read_send(private->tree, io);
 661
 662         ASYNC_RECV_TAIL(io, async_read);
 663 }
 664
 665 /*
 666   a handler for async write replies
 667  */
 668 static void async_write(struct smbcli_request *c_req)
 669 {
 670         struct async_info *async = c_req->async.private;
 671         struct ntvfs_request *req = async->req;
 672         req->async_states->status = smb_raw_write_recv(c_req, async->parms);
 673         talloc_free(async);
 674         req->async_states->send_fn(req);
 675 }
 676
 677 /*
 678   write to a file
 679 */
 680 static NTSTATUS cvfs_write(struct ntvfs_module_context *ntvfs,
 681                            struct ntvfs_request *req, union smb_write *io)
 682 {
 683         struct cvfs_private *private = ntvfs->private_data;
 684         struct smbcli_request *c_req;
 685
 686         SETUP_PID;
 687
 688         if (io->generic.level != RAW_WRITE_GENERIC &&
 689             private->map_generic) {
 690                 return ntvfs_map_write(ntvfs, req, io);
 691         }
 692         SETUP_FILE;
 693
 694         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 695                 return smb_raw_write(private->tree, io);
 696         }
 697
 698         c_req = smb_raw_write_send(private->tree, io);
 699
 700         ASYNC_RECV_TAIL(io, async_write);
 701 }
 702
 703 /*
 704   a handler for async seek replies
 705  */
 706 static void async_seek(struct smbcli_request *c_req)
 707 {
 708         struct async_info *async = c_req->async.private;
 709         struct ntvfs_request *req = async->req;
 710         req->async_states->status = smb_raw_seek_recv(c_req, async->parms);
 711         talloc_free(async);
 712         req->async_states->send_fn(req);
 713 }
 714
 715 /*
 716   seek in a file
 717 */
 718 static NTSTATUS cvfs_seek(struct ntvfs_module_context *ntvfs,
 719                           struct ntvfs_request *req,
 720                           union smb_seek *io)
 721 {
 722         struct cvfs_private *private = ntvfs->private_data;
 723         struct smbcli_request *c_req;
 724
 725         SETUP_PID_AND_FILE;
 726
 727         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 728                 return smb_raw_seek(private->tree, io);
 729         }
 730
 731         c_req = smb_raw_seek_send(private->tree, io);
 732
 733         ASYNC_RECV_TAIL(io, async_seek);
 734 }
 735
 736 /*
 737   flush a file
 738 */
 739 static NTSTATUS cvfs_flush(struct ntvfs_module_context *ntvfs,
 740                            struct ntvfs_request *req,
 741                            union smb_flush *io)
 742 {
 743         struct cvfs_private *private = ntvfs->private_data;
 744         struct smbcli_request *c_req;
 745
 746         SETUP_PID;
 747         switch (io->generic.level) {
 748         case RAW_FLUSH_FLUSH:
 749                 SETUP_FILE;
 750                 break;
 751         case RAW_FLUSH_ALL:
 752                 io->generic.in.file.fnum = 0xFFFF;
 753                 break;
 754         case RAW_FLUSH_SMB2:
 755                 return NT_STATUS_INVALID_LEVEL;
 756         }
 757
 758         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 759                 return smb_raw_flush(private->tree, io);
 760         }
 761
 762         c_req = smb_raw_flush_send(private->tree, io);
 763
 764         SIMPLE_ASYNC_TAIL;
 765 }
 766
 767 /*
 768   close a file
 769 */
 770 static NTSTATUS cvfs_close(struct ntvfs_module_context *ntvfs,
 771                            struct ntvfs_request *req, union smb_close *io)
 772 {
 773         struct cvfs_private *private = ntvfs->private_data;
 774         struct smbcli_request *c_req;
 775         struct cvfs_file *f;
 776         union smb_close io2;
 777
 778         SETUP_PID;
 779
 780         if (io->generic.level != RAW_CLOSE_GENERIC &&
 781             private->map_generic) {
 782                 return ntvfs_map_close(ntvfs, req, io);
 783         }
 784
 785         if (io->generic.level == RAW_CLOSE_GENERIC) {
 786                 ZERO_STRUCT(io2);
 787                 io2.close.level = RAW_CLOSE_CLOSE;
 788                 io2.close.in.file = io->generic.in.file;
 789                 io2.close.in.write_time = io->generic.in.write_time;
 790                 io = &io2;
 791         }
 792
 793         SETUP_FILE_HERE(f);
 794         /* Note, we aren't free-ing f, or it's h here. Should we?
 795            even if file-close fails, we'll remove it from the list,
 796            what else would we do? Maybe we should not remove until
 797            after the proxied call completes? */
 798         DLIST_REMOVE(private->files, f);
 799
 800         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 801                 return smb_raw_close(private->tree, io);
 802         }
 803
 804         c_req = smb_raw_close_send(private->tree, io);
 805
 806         SIMPLE_ASYNC_TAIL;
 807 }
 808
 809 /*
 810   exit - closing files open by the pid
 811 */
 812 static NTSTATUS cvfs_exit(struct ntvfs_module_context *ntvfs,
 813                           struct ntvfs_request *req)
 814 {
 815         struct cvfs_private *private = ntvfs->private_data;
 816         struct smbcli_request *c_req;
 817
 818         SETUP_PID;
 819
 820         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 821                 return smb_raw_exit(private->tree->session);
 822         }
 823
 824         c_req = smb_raw_exit_send(private->tree->session);
 825
 826         SIMPLE_ASYNC_TAIL;
 827 }
 828
 829 /*
 830   logoff - closing files open by the user
 831 */
 832 static NTSTATUS cvfs_logoff(struct ntvfs_module_context *ntvfs,
 833                             struct ntvfs_request *req)
 834 {
 835         /* we can't do this right in the cifs backend .... */
 836         return NT_STATUS_OK;
 837 }
 838
 839 /*
 840   setup for an async call - nothing to do yet
 841 */
 842 static NTSTATUS cvfs_async_setup(struct ntvfs_module_context *ntvfs,
 843                                  struct ntvfs_request *req,
 844                                  void *private)
 845 {
 846         return NT_STATUS_OK;
 847 }
 848
 849 /*
 850   cancel an async call
 851 */
 852 static NTSTATUS cvfs_cancel(struct ntvfs_module_context *ntvfs,
 853                             struct ntvfs_request *req)
 854 {
 855         struct cvfs_private *private = ntvfs->private_data;
 856         struct async_info *a;
 857
 858         /* find the matching request */
 859         for (a=private->pending;a;a=a->next) {
 860                 if (a->req == req) {
 861                         break;
 862                 }
 863         }
 864
 865         if (a == NULL) {
 866                 return NT_STATUS_INVALID_PARAMETER;
 867         }
 868
 869         return smb_raw_ntcancel(a->c_req);
 870 }
 871
 872 /*
 873   lock a byte range
 874 */
 875 static NTSTATUS cvfs_lock(struct ntvfs_module_context *ntvfs,
 876                           struct ntvfs_request *req, union smb_lock *io)
 877 {
 878         struct cvfs_private *private = ntvfs->private_data;
 879         struct smbcli_request *c_req;
 880
 881         SETUP_PID;
 882
 883         if (io->generic.level != RAW_LOCK_GENERIC &&
 884             private->map_generic) {
 885                 return ntvfs_map_lock(ntvfs, req, io);
 886         }
 887         SETUP_FILE;
 888
 889         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 890                 return smb_raw_lock(private->tree, io);
 891         }
 892
 893         c_req = smb_raw_lock_send(private->tree, io);
 894         SIMPLE_ASYNC_TAIL;
 895 }
 896
 897 /*
 898   set info on a open file
 899 */
 900 static NTSTATUS cvfs_setfileinfo(struct ntvfs_module_context *ntvfs,
 901                                  struct ntvfs_request *req,
 902                                  union smb_setfileinfo *io)
 903 {
 904         struct cvfs_private *private = ntvfs->private_data;
 905         struct smbcli_request *c_req;
 906
 907         SETUP_PID_AND_FILE;
 908
 909         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 910                 return smb_raw_setfileinfo(private->tree, io);
 911         }
 912         c_req = smb_raw_setfileinfo_send(private->tree, io);
 913
 914         SIMPLE_ASYNC_TAIL;
 915 }
 916
 917
 918 /*
 919   a handler for async fsinfo replies
 920  */
 921 static void async_fsinfo(struct smbcli_request *c_req)
 922 {
 923         struct async_info *async = c_req->async.private;
 924         struct ntvfs_request *req = async->req;
 925         req->async_states->status = smb_raw_fsinfo_recv(c_req, req, async->parms);
 926         talloc_free(async);
 927         req->async_states->send_fn(req);
 928 }
 929
 930 /*
 931   return filesystem space info
 932 */
 933 static NTSTATUS cvfs_fsinfo(struct ntvfs_module_context *ntvfs,
 934                             struct ntvfs_request *req, union smb_fsinfo *fs)
 935 {
 936         struct cvfs_private *private = ntvfs->private_data;
 937         struct smbcli_request *c_req;
 938
 939         SETUP_PID;
 940
 941         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 942                 return smb_raw_fsinfo(private->tree, req, fs);
 943         }
 944
 945         c_req = smb_raw_fsinfo_send(private->tree, req, fs);
 946
 947         ASYNC_RECV_TAIL(fs, async_fsinfo);
 948 }
 949
 950 /*
 951   return print queue info
 952 */
 953 static NTSTATUS cvfs_lpq(struct ntvfs_module_context *ntvfs,
 954                          struct ntvfs_request *req, union smb_lpq *lpq)
 955 {
 956         return NT_STATUS_NOT_SUPPORTED;
 957 }
 958
 959 /*
 960    list files in a directory matching a wildcard pattern
 961 */
 962 static NTSTATUS cvfs_search_first(struct ntvfs_module_context *ntvfs,
 963                                   struct ntvfs_request *req, union smb_search_first *io,
 964                                   void *search_private,
 965                                   bool (*callback)(void *, const union smb_search_data *))
 966 {
 967         struct cvfs_private *private = ntvfs->private_data;
 968
 969         SETUP_PID;
 970
 971         return smb_raw_search_first(private->tree, req, io, search_private, callback);
 972 }
 973
 974 /* continue a search */
 975 static NTSTATUS cvfs_search_next(struct ntvfs_module_context *ntvfs,
 976                                  struct ntvfs_request *req, union smb_search_next *io,
 977                                  void *search_private,
 978                                  bool (*callback)(void *, const union smb_search_data *))
 979 {
 980         struct cvfs_private *private = ntvfs->private_data;
 981
 982         SETUP_PID;
 983
 984         return smb_raw_search_next(private->tree, req, io, search_private, callback);
 985 }
 986
 987 /* close a search */
 988 static NTSTATUS cvfs_search_close(struct ntvfs_module_context *ntvfs,
 989                                   struct ntvfs_request *req, union smb_search_close *io)
 990 {
 991         struct cvfs_private *private = ntvfs->private_data;
 992
 993         SETUP_PID;
 994
 995         return smb_raw_search_close(private->tree, io);
 996 }
 997
 998 /*
 999   a handler for async trans2 replies
1000  */
1001 static void async_trans2(struct smbcli_request *c_req)
1002 {
1003         struct async_info *async = c_req->async.private;
1004         struct ntvfs_request *req = async->req;
1005         req->async_states->status = smb_raw_trans2_recv(c_req, req, async->parms);
1006         talloc_free(async);
1007         req->async_states->send_fn(req);
1008 }
1009
1010 /* raw trans2 */
1011 static NTSTATUS cvfs_trans2(struct ntvfs_module_context *ntvfs,
1012                             struct ntvfs_request *req,
1013                             struct smb_trans2 *trans2)
1014 {
1015         struct cvfs_private *private = ntvfs->private_data;
1016         struct smbcli_request *c_req;
1017
1018         if (private->map_trans2) {
1019                 return NT_STATUS_NOT_IMPLEMENTED;
1020         }
1021
1022         SETUP_PID;
1023
1024         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
1025                 return smb_raw_trans2(private->tree, req, trans2);
1026         }
1027
1028         c_req = smb_raw_trans2_send(private->tree, trans2);
1029
1030         ASYNC_RECV_TAIL(trans2, async_trans2);
1031 }
1032
1033
1034 /* SMBtrans - not used on file shares */
1035 static NTSTATUS cvfs_trans(struct ntvfs_module_context *ntvfs,
1036                            struct ntvfs_request *req,
1037                            struct smb_trans2 *trans2)
1038 {
1039         return NT_STATUS_ACCESS_DENIED;
1040 }
1041
1042 /*
1043   a handler for async change notify replies
1044  */
1045 static void async_changenotify(struct smbcli_request *c_req)
1046 {
1047         struct async_info *async = c_req->async.private;
1048         struct ntvfs_request *req = async->req;
1049         req->async_states->status = smb_raw_changenotify_recv(c_req, req, async->parms);
1050         talloc_free(async);
1051         req->async_states->send_fn(req);
1052 }
1053
1054 /* change notify request - always async */
1055 static NTSTATUS cvfs_notify(struct ntvfs_module_context *ntvfs,
1056                             struct ntvfs_request *req,
1057                             union smb_notify *io)
1058 {
1059         struct cvfs_private *private = ntvfs->private_data;
1060         struct smbcli_request *c_req;
1061         int saved_timeout = private->transport->options.request_timeout;
1062         struct cvfs_file *f;
1063
1064         if (io->nttrans.level != RAW_NOTIFY_NTTRANS) {
1065                 return NT_STATUS_NOT_IMPLEMENTED;
1066         }
1067
1068         SETUP_PID;
1069
1070         f = ntvfs_handle_get_backend_data(io->nttrans.in.file.ntvfs, ntvfs);
1071         if (!f) return NT_STATUS_INVALID_HANDLE;
1072         io->nttrans.in.file.fnum = f->fnum;
1073
1074         /* this request doesn't make sense unless its async */
1075         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
1076                 return NT_STATUS_INVALID_PARAMETER;
1077         }
1078
1079         /* we must not timeout on notify requests - they wait
1080            forever */
1081         private->transport->options.request_timeout = 0;
1082
1083         c_req = smb_raw_changenotify_send(private->tree, io);
1084
1085         private->transport->options.request_timeout = saved_timeout;
1086
1087         ASYNC_RECV_TAIL(io, async_changenotify);
1088 }
1089
1090 /*
1091   initialise the CIFS->CIFS backend, registering ourselves with the ntvfs subsystem
1092  */
1093 NTSTATUS ntvfs_cifs_init(void)
1094 {
1095         NTSTATUS ret;
1096         struct ntvfs_ops ops;
1097         NTVFS_CURRENT_CRITICAL_SIZES(vers);
1098
1099         ZERO_STRUCT(ops);
1100
1101         /* fill in the name and type */
1102         ops.name = "cifs";
1103         ops.type = NTVFS_DISK;
1104
1105         /* fill in all the operations */
1106         ops.connect = cvfs_connect;
1107         ops.disconnect = cvfs_disconnect;
1108         ops.unlink = cvfs_unlink;
1109         ops.chkpath = cvfs_chkpath;
1110         ops.qpathinfo = cvfs_qpathinfo;
1111         ops.setpathinfo = cvfs_setpathinfo;
1112         ops.open = cvfs_open;
1113         ops.mkdir = cvfs_mkdir;
1114         ops.rmdir = cvfs_rmdir;
1115         ops.rename = cvfs_rename;
1116         ops.copy = cvfs_copy;
1117         ops.ioctl = cvfs_ioctl;
1118         ops.read = cvfs_read;
1119         ops.write = cvfs_write;
1120         ops.seek = cvfs_seek;
1121         ops.flush = cvfs_flush;
1122         ops.close = cvfs_close;
1123         ops.exit = cvfs_exit;
1124         ops.lock = cvfs_lock;
1125         ops.setfileinfo = cvfs_setfileinfo;
1126         ops.qfileinfo = cvfs_qfileinfo;
1127         ops.fsinfo = cvfs_fsinfo;
1128         ops.lpq = cvfs_lpq;
1129         ops.search_first = cvfs_search_first;
1130         ops.search_next = cvfs_search_next;
1131         ops.search_close = cvfs_search_close;
1132         ops.trans = cvfs_trans;
1133         ops.logoff = cvfs_logoff;
1134         ops.async_setup = cvfs_async_setup;
1135         ops.cancel = cvfs_cancel;
1136         ops.notify = cvfs_notify;
1137         ops.trans2 = cvfs_trans2;
1138
1139         /* register ourselves with the NTVFS subsystem. We register
1140            under the name 'cifs'. */
1141         ret = ntvfs_register(&ops, &vers);
1142
1143         if (!NT_STATUS_IS_OK(ret)) {
1144                 DEBUG(0,("Failed to register CIFS backend!\n"));
1145         }
1146
1147         return ret;
1148 }