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