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