source4/ntvfs/cifs/vfs_cifs.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    CIFS-on-CIFS NTVFS filesystem backend
   5
   6    Copyright (C) Andrew Tridgell 2003
   7    Copyright (C) James J Myers 2003 <myersjj@samba.org>
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 */
  22 /*
  23   this implements a CIFS->CIFS NTVFS filesystem backend.
  24
  25 */
  26
  27 #include "includes.h"
  28 #include "libcli/raw/libcliraw.h"
  29 #include "libcli/raw/raw_proto.h"
  30 #include "libcli/smb_composite/smb_composite.h"
  31 #include "auth/auth.h"
  32 #include "auth/credentials/credentials.h"
  33 #include "ntvfs/ntvfs.h"
  34 #include "../lib/util/dlinklist.h"
  35 #include "param/param.h"
  36 #include "libcli/resolve/resolve.h"
  37 #include "../libcli/smb/smbXcli_base.h"
  38
  39 struct cvfs_file {
  40         struct cvfs_file *prev, *next;
  41         uint16_t fnum;
  42         struct ntvfs_handle *h;
  43 };
  44
  45 /* this is stored in ntvfs_private */
  46 struct cvfs_private {
  47         struct smbcli_tree *tree;
  48         struct smbcli_transport *transport;
  49         struct ntvfs_module_context *ntvfs;
  50         struct async_info *pending;
  51         struct cvfs_file *files;
  52         bool map_generic;
  53         bool map_trans2;
  54 };
  55
  56
  57 /* a structure used to pass information to an async handler */
  58 struct async_info {
  59         struct async_info *next, *prev;
  60         struct cvfs_private *cvfs;
  61         struct ntvfs_request *req;
  62         struct smbcli_request *c_req;
  63         struct cvfs_file *f;
  64         void *parms;
  65 };
  66
  67 NTSTATUS ntvfs_cifs_init(TALLOC_CTX *);
  68
  69 #define CHECK_UPSTREAM_OPEN do { \
  70         if (!smbXcli_conn_is_connected(p->transport->conn)) { \
  71                 req->async_states->state|=NTVFS_ASYNC_STATE_CLOSE; \
  72                 return NT_STATUS_CONNECTION_DISCONNECTED; \
  73         } \
  74 } while(0)
  75
  76 #define SETUP_PID do { \
  77         p->tree->session->pid = req->smbpid; \
  78         CHECK_UPSTREAM_OPEN; \
  79 } while(0)
  80
  81 #define SETUP_FILE_HERE(f) do { \
  82         f = ntvfs_handle_get_backend_data(io->generic.in.file.ntvfs, ntvfs); \
  83         if (!f) return NT_STATUS_INVALID_HANDLE; \
  84         io->generic.in.file.fnum = f->fnum; \
  85 } while (0)
  86
  87 #define SETUP_FILE do { \
  88         struct cvfs_file *f; \
  89         SETUP_FILE_HERE(f); \
  90 } while (0)
  91
  92 #define SETUP_PID_AND_FILE do { \
  93         SETUP_PID; \
  94         SETUP_FILE; \
  95 } while (0)
  96
  97 #define CIFS_SERVER             "cifs:server"
  98 #define CIFS_USER               "cifs:user"
  99 #define CIFS_PASSWORD           "cifs:password"
 100 #define CIFS_DOMAIN             "cifs:domain"
 101 #define CIFS_SHARE              "cifs:share"
 102 #define CIFS_USE_MACHINE_ACCT   "cifs:use-machine-account"
 103 #define CIFS_USE_S4U2PROXY      "cifs:use-s4u2proxy"
 104 #define CIFS_MAP_GENERIC        "cifs:map-generic"
 105 #define CIFS_MAP_TRANS2         "cifs:map-trans2"
 106
 107 #define CIFS_USE_MACHINE_ACCT_DEFAULT   false
 108 #define CIFS_USE_S4U2PROXY_DEFAULT      false
 109 #define CIFS_MAP_GENERIC_DEFAULT        false
 110 #define CIFS_MAP_TRANS2_DEFAULT         true
 111
 112 /*
 113   a handler for oplock break events from the server - these need to be passed
 114   along to the client
 115  */
 116 static bool oplock_handler(struct smbcli_transport *transport, uint16_t tid, uint16_t fnum, uint8_t level, void *p_private)
 117 {
 118         struct cvfs_private *p = p_private;
 119         NTSTATUS status;
 120         struct ntvfs_handle *h = NULL;
 121         struct cvfs_file *f;
 122
 123         for (f=p->files; f; f=f->next) {
 124                 if (f->fnum != fnum) continue;
 125                 h = f->h;
 126                 break;
 127         }
 128
 129         if (!h) {
 130                 DEBUG(5,("vfs_cifs: ignoring oplock break level %d for fnum %d\n", level, fnum));
 131                 return true;
 132         }
 133
 134         DEBUG(5,("vfs_cifs: sending oplock break level %d for fnum %d\n", level, fnum));
 135         status = ntvfs_send_oplock_break(p->ntvfs, h, level);
 136         if (!NT_STATUS_IS_OK(status)) return false;
 137         return true;
 138 }
 139
 140 /*
 141   connect to a share - used when a tree_connect operation comes in.
 142 */
 143 static NTSTATUS cvfs_connect(struct ntvfs_module_context *ntvfs,
 144                              struct ntvfs_request *req,
 145                              union smb_tcon *tcon)
 146 {
 147         NTSTATUS status;
 148         struct cvfs_private *p;
 149         const char *host, *user, *pass, *domain, *remote_share;
 150         struct smb_composite_connect io;
 151         struct composite_context *creq;
 152         struct share_config *scfg = ntvfs->ctx->config;
 153
 154         struct cli_credentials *credentials;
 155         bool machine_account;
 156         bool s4u2proxy;
 157         const char* sharename;
 158         TALLOC_CTX *tmp_ctx;
 159
 160         tmp_ctx = talloc_new(req);
 161         if (tmp_ctx == NULL) {
 162                 return NT_STATUS_NO_MEMORY;
 163         }
 164
 165         switch (tcon->generic.level) {
 166         case RAW_TCON_TCON:
 167                 sharename = tcon->tcon.in.service;
 168                 break;
 169         case RAW_TCON_TCONX:
 170                 sharename = tcon->tconx.in.path;
 171                 break;
 172         case RAW_TCON_SMB2:
 173                 sharename = tcon->smb2.in.path;
 174                 break;
 175         default:
 176                 status = NT_STATUS_INVALID_LEVEL;
 177                 goto out;
 178         }
 179
 180         if (strncmp(sharename, "\\\\", 2) == 0) {
 181                 char *str = strchr(sharename+2, '\\');
 182                 if (str) {
 183                         sharename = str + 1;
 184                 }
 185         }
 186
 187         /* Here we need to determine which server to connect to.
 188          * For now we use parametric options, type cifs.
 189          */
 190         host = share_string_option(tmp_ctx, scfg, CIFS_SERVER, NULL);
 191         user = share_string_option(tmp_ctx, scfg, CIFS_USER, NULL);
 192         pass = share_string_option(tmp_ctx, scfg, CIFS_PASSWORD, NULL);
 193         domain = share_string_option(tmp_ctx, scfg, CIFS_DOMAIN, NULL);
 194         remote_share = share_string_option(tmp_ctx, scfg, CIFS_SHARE, NULL);
 195         if (!remote_share) {
 196                 remote_share = sharename;
 197         }
 198
 199         machine_account = share_bool_option(scfg, CIFS_USE_MACHINE_ACCT, CIFS_USE_MACHINE_ACCT_DEFAULT);
 200         s4u2proxy = share_bool_option(scfg, CIFS_USE_S4U2PROXY, CIFS_USE_S4U2PROXY_DEFAULT);
 201
 202         p = talloc_zero(ntvfs, struct cvfs_private);
 203         if (!p) {
 204                 status = NT_STATUS_NO_MEMORY;
 205                 goto out;
 206         }
 207
 208         ntvfs->private_data = p;
 209
 210         if (!host) {
 211                 DEBUG(1,("CIFS backend: You must supply server\n"));
 212                 status = NT_STATUS_INVALID_PARAMETER;
 213                 goto out;
 214         }
 215
 216         if (user && pass) {
 217                 DEBUG(5, ("CIFS backend: Using specified password\n"));
 218                 credentials = cli_credentials_init(p);
 219                 if (!credentials) {
 220                         status = NT_STATUS_NO_MEMORY;
 221                         goto out;
 222                 }
 223                 cli_credentials_set_conf(credentials, ntvfs->ctx->lp_ctx);
 224                 cli_credentials_set_username(credentials, user, CRED_SPECIFIED);
 225                 if (domain) {
 226                         cli_credentials_set_domain(credentials, domain, CRED_SPECIFIED);
 227                 }
 228                 cli_credentials_set_password(credentials, pass, CRED_SPECIFIED);
 229         } else if (machine_account) {
 230                 DEBUG(5, ("CIFS backend: Using machine account\n"));
 231                 credentials = cli_credentials_init(p);
 232                 cli_credentials_set_conf(credentials, ntvfs->ctx->lp_ctx);
 233                 if (domain) {
 234                         cli_credentials_set_domain(credentials, domain, CRED_SPECIFIED);
 235                 }
 236                 status = cli_credentials_set_machine_account(credentials, ntvfs->ctx->lp_ctx);
 237                 if (!NT_STATUS_IS_OK(status)) {
 238                         goto out;
 239                 }
 240         } else if (req->session_info->credentials) {
 241                 DEBUG(5, ("CIFS backend: Using delegated credentials\n"));
 242                 credentials = req->session_info->credentials;
 243         } else if (s4u2proxy) {
 244                 struct ccache_container *ccc = NULL;
 245                 const char *err_str = NULL;
 246                 int ret;
 247                 char *impersonate_principal;
 248                 char *self_service;
 249                 char *target_service;
 250
 251                 impersonate_principal = talloc_asprintf(req, "%s@%s",
 252                                                 req->session_info->info->account_name,
 253                                                 req->session_info->info->domain_name);
 254
 255                 self_service = talloc_asprintf(req, "cifs/%s",
 256                                                lpcfg_netbios_name(ntvfs->ctx->lp_ctx));
 257
 258                 target_service = talloc_asprintf(req, "cifs/%s", host);
 259
 260                 DEBUG(5, ("CIFS backend: Using S4U2Proxy credentials\n"));
 261
 262                 credentials = cli_credentials_init(p);
 263                 cli_credentials_set_conf(credentials, ntvfs->ctx->lp_ctx);
 264                 if (domain) {
 265                         cli_credentials_set_domain(credentials, domain, CRED_SPECIFIED);
 266                 }
 267                 status = cli_credentials_set_machine_account(credentials, ntvfs->ctx->lp_ctx);
 268                 if (!NT_STATUS_IS_OK(status)) {
 269                         goto out;
 270                 }
 271                 cli_credentials_invalidate_ccache(credentials, CRED_SPECIFIED);
 272                 cli_credentials_set_impersonate_principal(credentials,
 273                                                           impersonate_principal,
 274                                                           self_service);
 275                 cli_credentials_set_target_service(credentials, target_service);
 276                 ret = cli_credentials_get_ccache(credentials,
 277                                                  ntvfs->ctx->event_ctx,
 278                                                  ntvfs->ctx->lp_ctx,
 279                                                  &ccc,
 280                                                  &err_str);
 281                 if (ret != 0) {
 282                         status = NT_STATUS_CROSSREALM_DELEGATION_FAILURE;
 283                         DEBUG(1,("S4U2Proxy: cli_credentials_get_ccache() gave: ret[%d] str[%s] - %s\n",
 284                                 ret, err_str, nt_errstr(status)));
 285                         goto out;
 286                 }
 287
 288         } else {
 289                 DEBUG(1,("CIFS backend: NO delegated credentials found: You must supply server, user and password or the client must supply delegated credentials\n"));
 290                 status = NT_STATUS_INTERNAL_ERROR;
 291                 goto out;
 292         }
 293
 294         /* connect to the server, using the smbd event context */
 295         io.in.dest_host = host;
 296         io.in.dest_ports = lpcfg_smb_ports(ntvfs->ctx->lp_ctx);
 297         io.in.socket_options = lpcfg_socket_options(ntvfs->ctx->lp_ctx);
 298         io.in.called_name = host;
 299         io.in.existing_conn = NULL;
 300         io.in.credentials = credentials;
 301         io.in.fallback_to_anonymous = false;
 302         io.in.workgroup = lpcfg_workgroup(ntvfs->ctx->lp_ctx);
 303         io.in.service = remote_share;
 304         io.in.service_type = "?????";
 305         io.in.gensec_settings = lpcfg_gensec_settings(p, ntvfs->ctx->lp_ctx);
 306         lpcfg_smbcli_options(ntvfs->ctx->lp_ctx, &io.in.options);
 307         lpcfg_smbcli_session_options(ntvfs->ctx->lp_ctx, &io.in.session_options);
 308
 309         if (!(ntvfs->ctx->client_caps & NTVFS_CLIENT_CAP_LEVEL_II_OPLOCKS)) {
 310                 io.in.options.use_level2_oplocks = false;
 311         }
 312
 313         creq = smb_composite_connect_send(&io, p,
 314                                           lpcfg_resolve_context(ntvfs->ctx->lp_ctx),
 315                                           ntvfs->ctx->event_ctx);
 316         status = smb_composite_connect_recv(creq, p);
 317         if (!NT_STATUS_IS_OK(status)) {
 318                 goto out;
 319         }
 320
 321         p->tree = io.out.tree;
 322
 323         p->transport = p->tree->session->transport;
 324         SETUP_PID;
 325         p->ntvfs = ntvfs;
 326
 327         ntvfs->ctx->fs_type = talloc_strdup(ntvfs->ctx, "NTFS");
 328         if (ntvfs->ctx->fs_type == NULL) {
 329                 status = NT_STATUS_NO_MEMORY;
 330                 goto out;
 331         }
 332         ntvfs->ctx->dev_type = talloc_strdup(ntvfs->ctx, "A:");
 333         if (ntvfs->ctx->dev_type == NULL) {
 334                 status = NT_STATUS_NO_MEMORY;
 335                 goto out;
 336         }
 337
 338         if (tcon->generic.level == RAW_TCON_TCONX) {
 339                 tcon->tconx.out.fs_type = ntvfs->ctx->fs_type;
 340                 tcon->tconx.out.dev_type = ntvfs->ctx->dev_type;
 341         }
 342
 343         /* we need to receive oplock break requests from the server */
 344         smbcli_oplock_handler(p->transport, oplock_handler, p);
 345
 346         p->map_generic = share_bool_option(scfg, CIFS_MAP_GENERIC, CIFS_MAP_GENERIC_DEFAULT);
 347
 348         p->map_trans2 = share_bool_option(scfg, CIFS_MAP_TRANS2, CIFS_MAP_TRANS2_DEFAULT);
 349
 350         status = NT_STATUS_OK;
 351
 352 out:
 353         TALLOC_FREE(tmp_ctx);
 354         return status;
 355 }
 356
 357 /*
 358   disconnect from a share
 359 */
 360 static NTSTATUS cvfs_disconnect(struct ntvfs_module_context *ntvfs)
 361 {
 362         struct cvfs_private *p = ntvfs->private_data;
 363         struct async_info *a, *an;
 364
 365         /* first cleanup pending requests */
 366         for (a=p->pending; a; a = an) {
 367                 an = a->next;
 368                 smbcli_request_destroy(a->c_req);
 369                 talloc_free(a);
 370         }
 371
 372         talloc_free(p);
 373         ntvfs->private_data = NULL;
 374
 375         return NT_STATUS_OK;
 376 }
 377
 378 /*
 379   destroy an async info structure
 380 */
 381 static int async_info_destructor(struct async_info *async)
 382 {
 383         DLIST_REMOVE(async->cvfs->pending, async);
 384         return 0;
 385 }
 386
 387 /*
 388   a handler for simple async replies
 389   this handler can only be used for functions that don't return any
 390   parameters (those that just return a status code)
 391  */
 392 static void async_simple(struct smbcli_request *c_req)
 393 {
 394         struct async_info *async = c_req->async.private_data;
 395         struct ntvfs_request *req = async->req;
 396         req->async_states->status = smbcli_request_simple_recv(c_req);
 397         talloc_free(async);
 398         req->async_states->send_fn(req);
 399 }
 400
 401
 402 /* save some typing for the simple functions */
 403 #define ASYNC_RECV_TAIL_F(io, async_fn, file) do { \
 404         if (!c_req) return NT_STATUS_UNSUCCESSFUL; \
 405         { \
 406                 struct async_info *async; \
 407                 async = talloc(req, struct async_info); \
 408                 if (!async) return NT_STATUS_NO_MEMORY; \
 409                 async->parms = io; \
 410                 async->req = req; \
 411                 async->f = file; \
 412                 async->cvfs = p; \
 413                 async->c_req = c_req; \
 414                 DLIST_ADD(p->pending, async); \
 415                 c_req->async.private_data = async; \
 416                 talloc_set_destructor(async, async_info_destructor); \
 417         } \
 418         c_req->async.fn = async_fn; \
 419         req->async_states->state |= NTVFS_ASYNC_STATE_ASYNC; \
 420         return NT_STATUS_OK; \
 421 } while (0)
 422
 423 #define ASYNC_RECV_TAIL(io, async_fn) ASYNC_RECV_TAIL_F(io, async_fn, NULL)
 424
 425 #define SIMPLE_ASYNC_TAIL ASYNC_RECV_TAIL(NULL, async_simple)
 426
 427 /*
 428   delete a file - the dirtype specifies the file types to include in the search.
 429   The name can contain CIFS wildcards, but rarely does (except with OS/2 clients)
 430 */
 431 static NTSTATUS cvfs_unlink(struct ntvfs_module_context *ntvfs,
 432                             struct ntvfs_request *req, union smb_unlink *unl)
 433 {
 434         struct cvfs_private *p = ntvfs->private_data;
 435         struct smbcli_request *c_req;
 436
 437         SETUP_PID;
 438
 439         /* see if the front end will allow us to perform this
 440            function asynchronously.  */
 441         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 442                 return smb_raw_unlink(p->tree, unl);
 443         }
 444
 445         c_req = smb_raw_unlink_send(p->tree, unl);
 446
 447         SIMPLE_ASYNC_TAIL;
 448 }
 449
 450 /*
 451   a handler for async ioctl replies
 452  */
 453 static void async_ioctl(struct smbcli_request *c_req)
 454 {
 455         struct async_info *async = c_req->async.private_data;
 456         struct ntvfs_request *req = async->req;
 457         req->async_states->status = smb_raw_ioctl_recv(c_req, req, async->parms);
 458         talloc_free(async);
 459         req->async_states->send_fn(req);
 460 }
 461
 462 /*
 463   ioctl interface
 464 */
 465 static NTSTATUS cvfs_ioctl(struct ntvfs_module_context *ntvfs,
 466                            struct ntvfs_request *req, union smb_ioctl *io)
 467 {
 468         struct cvfs_private *p = ntvfs->private_data;
 469         struct smbcli_request *c_req;
 470
 471         SETUP_PID_AND_FILE;
 472
 473         /* see if the front end will allow us to perform this
 474            function asynchronously.  */
 475         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 476                 return smb_raw_ioctl(p->tree, req, io);
 477         }
 478
 479         c_req = smb_raw_ioctl_send(p->tree, io);
 480
 481         ASYNC_RECV_TAIL(io, async_ioctl);
 482 }
 483
 484 /*
 485   check if a directory exists
 486 */
 487 static NTSTATUS cvfs_chkpath(struct ntvfs_module_context *ntvfs,
 488                              struct ntvfs_request *req, union smb_chkpath *cp)
 489 {
 490         struct cvfs_private *p = ntvfs->private_data;
 491         struct smbcli_request *c_req;
 492
 493         SETUP_PID;
 494
 495         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 496                 return smb_raw_chkpath(p->tree, cp);
 497         }
 498
 499         c_req = smb_raw_chkpath_send(p->tree, cp);
 500
 501         SIMPLE_ASYNC_TAIL;
 502 }
 503
 504 /*
 505   a handler for async qpathinfo replies
 506  */
 507 static void async_qpathinfo(struct smbcli_request *c_req)
 508 {
 509         struct async_info *async = c_req->async.private_data;
 510         struct ntvfs_request *req = async->req;
 511         req->async_states->status = smb_raw_pathinfo_recv(c_req, req, async->parms);
 512         talloc_free(async);
 513         req->async_states->send_fn(req);
 514 }
 515
 516 /*
 517   return info on a pathname
 518 */
 519 static NTSTATUS cvfs_qpathinfo(struct ntvfs_module_context *ntvfs,
 520                                struct ntvfs_request *req, union smb_fileinfo *info)
 521 {
 522         struct cvfs_private *p = ntvfs->private_data;
 523         struct smbcli_request *c_req;
 524
 525         SETUP_PID;
 526
 527         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 528                 return smb_raw_pathinfo(p->tree, req, info);
 529         }
 530
 531         c_req = smb_raw_pathinfo_send(p->tree, info);
 532
 533         ASYNC_RECV_TAIL(info, async_qpathinfo);
 534 }
 535
 536 /*
 537   a handler for async qfileinfo replies
 538  */
 539 static void async_qfileinfo(struct smbcli_request *c_req)
 540 {
 541         struct async_info *async = c_req->async.private_data;
 542         struct ntvfs_request *req = async->req;
 543         req->async_states->status = smb_raw_fileinfo_recv(c_req, req, async->parms);
 544         talloc_free(async);
 545         req->async_states->send_fn(req);
 546 }
 547
 548 /*
 549   query info on a open file
 550 */
 551 static NTSTATUS cvfs_qfileinfo(struct ntvfs_module_context *ntvfs,
 552                                struct ntvfs_request *req, union smb_fileinfo *io)
 553 {
 554         struct cvfs_private *p = ntvfs->private_data;
 555         struct smbcli_request *c_req;
 556
 557         SETUP_PID_AND_FILE;
 558
 559         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 560                 return smb_raw_fileinfo(p->tree, req, io);
 561         }
 562
 563         c_req = smb_raw_fileinfo_send(p->tree, io);
 564
 565         ASYNC_RECV_TAIL(io, async_qfileinfo);
 566 }
 567
 568
 569 /*
 570   set info on a pathname
 571 */
 572 static NTSTATUS cvfs_setpathinfo(struct ntvfs_module_context *ntvfs,
 573                                  struct ntvfs_request *req, union smb_setfileinfo *st)
 574 {
 575         struct cvfs_private *p = ntvfs->private_data;
 576         struct smbcli_request *c_req;
 577
 578         SETUP_PID;
 579
 580         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 581                 return smb_raw_setpathinfo(p->tree, st);
 582         }
 583
 584         c_req = smb_raw_setpathinfo_send(p->tree, st);
 585
 586         SIMPLE_ASYNC_TAIL;
 587 }
 588
 589
 590 /*
 591   a handler for async open replies
 592  */
 593 static void async_open(struct smbcli_request *c_req)
 594 {
 595         struct async_info *async = c_req->async.private_data;
 596         struct cvfs_private *cvfs = async->cvfs;
 597         struct ntvfs_request *req = async->req;
 598         struct cvfs_file *f = async->f;
 599         union smb_open *io = async->parms;
 600         union smb_handle *file;
 601         talloc_free(async);
 602         req->async_states->status = smb_raw_open_recv(c_req, req, io);
 603         SMB_OPEN_OUT_FILE(io, file);
 604         f->fnum = file->fnum;
 605         file->ntvfs = NULL;
 606         if (!NT_STATUS_IS_OK(req->async_states->status)) goto failed;
 607         req->async_states->status = ntvfs_handle_set_backend_data(f->h, cvfs->ntvfs, f);
 608         if (!NT_STATUS_IS_OK(req->async_states->status)) goto failed;
 609         file->ntvfs = f->h;
 610         DLIST_ADD(cvfs->files, f);
 611 failed:
 612         req->async_states->send_fn(req);
 613 }
 614
 615 /*
 616   open a file
 617 */
 618 static NTSTATUS cvfs_open(struct ntvfs_module_context *ntvfs,
 619                           struct ntvfs_request *req, union smb_open *io)
 620 {
 621         struct cvfs_private *p = ntvfs->private_data;
 622         struct smbcli_request *c_req;
 623         struct ntvfs_handle *h;
 624         struct cvfs_file *f;
 625         NTSTATUS status;
 626
 627         SETUP_PID;
 628
 629         if (io->generic.level != RAW_OPEN_GENERIC &&
 630             p->map_generic) {
 631                 return ntvfs_map_open(ntvfs, req, io);
 632         }
 633
 634         status = ntvfs_handle_new(ntvfs, req, &h);
 635         NT_STATUS_NOT_OK_RETURN(status);
 636
 637         f = talloc_zero(h, struct cvfs_file);
 638         NT_STATUS_HAVE_NO_MEMORY(f);
 639         f->h = h;
 640
 641         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 642                 union smb_handle *file;
 643
 644                 status = smb_raw_open(p->tree, req, io);
 645                 NT_STATUS_NOT_OK_RETURN(status);
 646
 647                 SMB_OPEN_OUT_FILE(io, file);
 648                 f->fnum = file->fnum;
 649                 file->ntvfs = NULL;
 650                 status = ntvfs_handle_set_backend_data(f->h, p->ntvfs, f);
 651                 NT_STATUS_NOT_OK_RETURN(status);
 652                 file->ntvfs = f->h;
 653                 DLIST_ADD(p->files, f);
 654
 655                 return NT_STATUS_OK;
 656         }
 657
 658         c_req = smb_raw_open_send(p->tree, io);
 659
 660         ASYNC_RECV_TAIL_F(io, async_open, f);
 661 }
 662
 663 /*
 664   create a directory
 665 */
 666 static NTSTATUS cvfs_mkdir(struct ntvfs_module_context *ntvfs,
 667                            struct ntvfs_request *req, union smb_mkdir *md)
 668 {
 669         struct cvfs_private *p = ntvfs->private_data;
 670         struct smbcli_request *c_req;
 671
 672         SETUP_PID;
 673
 674         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 675                 return smb_raw_mkdir(p->tree, md);
 676         }
 677
 678         c_req = smb_raw_mkdir_send(p->tree, md);
 679
 680         SIMPLE_ASYNC_TAIL;
 681 }
 682
 683 /*
 684   remove a directory
 685 */
 686 static NTSTATUS cvfs_rmdir(struct ntvfs_module_context *ntvfs,
 687                            struct ntvfs_request *req, struct smb_rmdir *rd)
 688 {
 689         struct cvfs_private *p = ntvfs->private_data;
 690         struct smbcli_request *c_req;
 691
 692         SETUP_PID;
 693
 694         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 695                 return smb_raw_rmdir(p->tree, rd);
 696         }
 697         c_req = smb_raw_rmdir_send(p->tree, rd);
 698
 699         SIMPLE_ASYNC_TAIL;
 700 }
 701
 702 /*
 703   rename a set of files
 704 */
 705 static NTSTATUS cvfs_rename(struct ntvfs_module_context *ntvfs,
 706                             struct ntvfs_request *req, union smb_rename *ren)
 707 {
 708         struct cvfs_private *p = ntvfs->private_data;
 709         struct smbcli_request *c_req;
 710
 711         SETUP_PID;
 712
 713         if (ren->nttrans.level == RAW_RENAME_NTTRANS) {
 714                 struct cvfs_file *f;
 715                 f = ntvfs_handle_get_backend_data(ren->nttrans.in.file.ntvfs, ntvfs);
 716                 if (!f) return NT_STATUS_INVALID_HANDLE;
 717                 ren->nttrans.in.file.fnum = f->fnum;
 718         }
 719
 720         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 721                 return smb_raw_rename(p->tree, ren);
 722         }
 723
 724         c_req = smb_raw_rename_send(p->tree, ren);
 725
 726         SIMPLE_ASYNC_TAIL;
 727 }
 728
 729 /*
 730   copy a set of files
 731 */
 732 static NTSTATUS cvfs_copy(struct ntvfs_module_context *ntvfs,
 733                           struct ntvfs_request *req, struct smb_copy *cp)
 734 {
 735         return NT_STATUS_NOT_SUPPORTED;
 736 }
 737
 738 /*
 739   a handler for async read replies
 740  */
 741 static void async_read(struct smbcli_request *c_req)
 742 {
 743         struct async_info *async = c_req->async.private_data;
 744         struct ntvfs_request *req = async->req;
 745         req->async_states->status = smb_raw_read_recv(c_req, async->parms);
 746         talloc_free(async);
 747         req->async_states->send_fn(req);
 748 }
 749
 750 /*
 751   read from a file
 752 */
 753 static NTSTATUS cvfs_read(struct ntvfs_module_context *ntvfs,
 754                           struct ntvfs_request *req, union smb_read *io)
 755 {
 756         struct cvfs_private *p = ntvfs->private_data;
 757         struct smbcli_request *c_req;
 758
 759         SETUP_PID;
 760
 761         if (io->generic.level != RAW_READ_GENERIC &&
 762             p->map_generic) {
 763                 return ntvfs_map_read(ntvfs, req, io);
 764         }
 765
 766         SETUP_FILE;
 767
 768         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 769                 return smb_raw_read(p->tree, io);
 770         }
 771
 772         c_req = smb_raw_read_send(p->tree, io);
 773
 774         ASYNC_RECV_TAIL(io, async_read);
 775 }
 776
 777 /*
 778   a handler for async write replies
 779  */
 780 static void async_write(struct smbcli_request *c_req)
 781 {
 782         struct async_info *async = c_req->async.private_data;
 783         struct ntvfs_request *req = async->req;
 784         req->async_states->status = smb_raw_write_recv(c_req, async->parms);
 785         talloc_free(async);
 786         req->async_states->send_fn(req);
 787 }
 788
 789 /*
 790   write to a file
 791 */
 792 static NTSTATUS cvfs_write(struct ntvfs_module_context *ntvfs,
 793                            struct ntvfs_request *req, union smb_write *io)
 794 {
 795         struct cvfs_private *p = ntvfs->private_data;
 796         struct smbcli_request *c_req;
 797
 798         SETUP_PID;
 799
 800         if (io->generic.level != RAW_WRITE_GENERIC &&
 801             p->map_generic) {
 802                 return ntvfs_map_write(ntvfs, req, io);
 803         }
 804         SETUP_FILE;
 805
 806         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 807                 return smb_raw_write(p->tree, io);
 808         }
 809
 810         c_req = smb_raw_write_send(p->tree, io);
 811
 812         ASYNC_RECV_TAIL(io, async_write);
 813 }
 814
 815 /*
 816   a handler for async seek replies
 817  */
 818 static void async_seek(struct smbcli_request *c_req)
 819 {
 820         struct async_info *async = c_req->async.private_data;
 821         struct ntvfs_request *req = async->req;
 822         req->async_states->status = smb_raw_seek_recv(c_req, async->parms);
 823         talloc_free(async);
 824         req->async_states->send_fn(req);
 825 }
 826
 827 /*
 828   seek in a file
 829 */
 830 static NTSTATUS cvfs_seek(struct ntvfs_module_context *ntvfs,
 831                           struct ntvfs_request *req,
 832                           union smb_seek *io)
 833 {
 834         struct cvfs_private *p = ntvfs->private_data;
 835         struct smbcli_request *c_req;
 836
 837         SETUP_PID_AND_FILE;
 838
 839         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 840                 return smb_raw_seek(p->tree, io);
 841         }
 842
 843         c_req = smb_raw_seek_send(p->tree, io);
 844
 845         ASYNC_RECV_TAIL(io, async_seek);
 846 }
 847
 848 /*
 849   flush a file
 850 */
 851 static NTSTATUS cvfs_flush(struct ntvfs_module_context *ntvfs,
 852                            struct ntvfs_request *req,
 853                            union smb_flush *io)
 854 {
 855         struct cvfs_private *p = ntvfs->private_data;
 856         struct smbcli_request *c_req;
 857
 858         SETUP_PID;
 859         switch (io->generic.level) {
 860         case RAW_FLUSH_FLUSH:
 861                 SETUP_FILE;
 862                 break;
 863         case RAW_FLUSH_ALL:
 864                 io->generic.in.file.fnum = 0xFFFF;
 865                 break;
 866         case RAW_FLUSH_SMB2:
 867                 return NT_STATUS_INVALID_LEVEL;
 868         }
 869
 870         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 871                 return smb_raw_flush(p->tree, io);
 872         }
 873
 874         c_req = smb_raw_flush_send(p->tree, io);
 875
 876         SIMPLE_ASYNC_TAIL;
 877 }
 878
 879 /*
 880   close a file
 881 */
 882 static NTSTATUS cvfs_close(struct ntvfs_module_context *ntvfs,
 883                            struct ntvfs_request *req, union smb_close *io)
 884 {
 885         struct cvfs_private *p = ntvfs->private_data;
 886         struct smbcli_request *c_req;
 887         struct cvfs_file *f;
 888         union smb_close io2;
 889
 890         SETUP_PID;
 891
 892         if (io->generic.level != RAW_CLOSE_GENERIC &&
 893             p->map_generic) {
 894                 return ntvfs_map_close(ntvfs, req, io);
 895         }
 896
 897         if (io->generic.level == RAW_CLOSE_GENERIC) {
 898                 ZERO_STRUCT(io2);
 899                 io2.close.level = RAW_CLOSE_CLOSE;
 900                 io2.close.in.file = io->generic.in.file;
 901                 io2.close.in.write_time = io->generic.in.write_time;
 902                 io = &io2;
 903         }
 904
 905         SETUP_FILE_HERE(f);
 906         /* Note, we aren't free-ing f, or it's h here. Should we?
 907            even if file-close fails, we'll remove it from the list,
 908            what else would we do? Maybe we should not remove until
 909            after the proxied call completes? */
 910         DLIST_REMOVE(p->files, f);
 911
 912         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 913                 return smb_raw_close(p->tree, io);
 914         }
 915
 916         c_req = smb_raw_close_send(p->tree, io);
 917
 918         SIMPLE_ASYNC_TAIL;
 919 }
 920
 921 /*
 922   exit - closing files open by the pid
 923 */
 924 static NTSTATUS cvfs_exit(struct ntvfs_module_context *ntvfs,
 925                           struct ntvfs_request *req)
 926 {
 927         struct cvfs_private *p = ntvfs->private_data;
 928         struct smbcli_request *c_req;
 929
 930         SETUP_PID;
 931
 932         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
 933                 return smb_raw_exit(p->tree->session);
 934         }
 935
 936         c_req = smb_raw_exit_send(p->tree->session);
 937
 938         SIMPLE_ASYNC_TAIL;
 939 }
 940
 941 /*
 942   logoff - closing files open by the user
 943 */
 944 static NTSTATUS cvfs_logoff(struct ntvfs_module_context *ntvfs,
 945                             struct ntvfs_request *req)
 946 {
 947         /* we can't do this right in the cifs backend .... */
 948         return NT_STATUS_OK;
 949 }
 950
 951 /*
 952   setup for an async call - nothing to do yet
 953 */
 954 static NTSTATUS cvfs_async_setup(struct ntvfs_module_context *ntvfs,
 955                                  struct ntvfs_request *req,
 956                                  void *private_data)
 957 {
 958         return NT_STATUS_OK;
 959 }
 960
 961 /*
 962   cancel an async call
 963 */
 964 static NTSTATUS cvfs_cancel(struct ntvfs_module_context *ntvfs,
 965                             struct ntvfs_request *req)
 966 {
 967         struct cvfs_private *p = ntvfs->private_data;
 968         struct async_info *a;
 969
 970         /* find the matching request */
 971         for (a=p->pending;a;a=a->next) {
 972                 if (a->req == req) {
 973                         break;
 974                 }
 975         }
 976
 977         if (a == NULL) {
 978                 return NT_STATUS_INVALID_PARAMETER;
 979         }
 980
 981         return smb_raw_ntcancel(a->c_req);
 982 }
 983
 984 /*
 985   lock a byte range
 986 */
 987 static NTSTATUS cvfs_lock(struct ntvfs_module_context *ntvfs,
 988                           struct ntvfs_request *req, union smb_lock *io)
 989 {
 990         struct cvfs_private *p = ntvfs->private_data;
 991         struct smbcli_request *c_req;
 992
 993         SETUP_PID;
 994
 995         if (io->generic.level != RAW_LOCK_GENERIC &&
 996             p->map_generic) {
 997                 return ntvfs_map_lock(ntvfs, req, io);
 998         }
 999         SETUP_FILE;
1000
1001         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
1002                 return smb_raw_lock(p->tree, io);
1003         }
1004
1005         c_req = smb_raw_lock_send(p->tree, io);
1006         SIMPLE_ASYNC_TAIL;
1007 }
1008
1009 /*
1010   set info on a open file
1011 */
1012 static NTSTATUS cvfs_setfileinfo(struct ntvfs_module_context *ntvfs,
1013                                  struct ntvfs_request *req,
1014                                  union smb_setfileinfo *io)
1015 {
1016         struct cvfs_private *p = ntvfs->private_data;
1017         struct smbcli_request *c_req;
1018
1019         SETUP_PID_AND_FILE;
1020
1021         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
1022                 return smb_raw_setfileinfo(p->tree, io);
1023         }
1024         c_req = smb_raw_setfileinfo_send(p->tree, io);
1025
1026         SIMPLE_ASYNC_TAIL;
1027 }
1028
1029
1030 /*
1031   a handler for async fsinfo replies
1032  */
1033 static void async_fsinfo(struct smbcli_request *c_req)
1034 {
1035         struct async_info *async = c_req->async.private_data;
1036         struct ntvfs_request *req = async->req;
1037         req->async_states->status = smb_raw_fsinfo_recv(c_req, req, async->parms);
1038         talloc_free(async);
1039         req->async_states->send_fn(req);
1040 }
1041
1042 /*
1043   return filesystem space info
1044 */
1045 static NTSTATUS cvfs_fsinfo(struct ntvfs_module_context *ntvfs,
1046                             struct ntvfs_request *req, union smb_fsinfo *fs)
1047 {
1048         struct cvfs_private *p = ntvfs->private_data;
1049         struct smbcli_request *c_req;
1050
1051         SETUP_PID;
1052
1053         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
1054                 return smb_raw_fsinfo(p->tree, req, fs);
1055         }
1056
1057         c_req = smb_raw_fsinfo_send(p->tree, req, fs);
1058
1059         ASYNC_RECV_TAIL(fs, async_fsinfo);
1060 }
1061
1062 /*
1063   return print queue info
1064 */
1065 static NTSTATUS cvfs_lpq(struct ntvfs_module_context *ntvfs,
1066                          struct ntvfs_request *req, union smb_lpq *lpq)
1067 {
1068         return NT_STATUS_NOT_SUPPORTED;
1069 }
1070
1071 /*
1072    list files in a directory matching a wildcard pattern
1073 */
1074 static NTSTATUS cvfs_search_first(struct ntvfs_module_context *ntvfs,
1075                                   struct ntvfs_request *req, union smb_search_first *io,
1076                                   void *search_private,
1077                                   bool (*callback)(void *, const union smb_search_data *))
1078 {
1079         struct cvfs_private *p = ntvfs->private_data;
1080
1081         SETUP_PID;
1082
1083         return smb_raw_search_first(p->tree, req, io, search_private, callback);
1084 }
1085
1086 /* continue a search */
1087 static NTSTATUS cvfs_search_next(struct ntvfs_module_context *ntvfs,
1088                                  struct ntvfs_request *req, union smb_search_next *io,
1089                                  void *search_private,
1090                                  bool (*callback)(void *, const union smb_search_data *))
1091 {
1092         struct cvfs_private *p = ntvfs->private_data;
1093
1094         SETUP_PID;
1095
1096         return smb_raw_search_next(p->tree, req, io, search_private, callback);
1097 }
1098
1099 /* close a search */
1100 static NTSTATUS cvfs_search_close(struct ntvfs_module_context *ntvfs,
1101                                   struct ntvfs_request *req, union smb_search_close *io)
1102 {
1103         struct cvfs_private *p = ntvfs->private_data;
1104
1105         SETUP_PID;
1106
1107         return smb_raw_search_close(p->tree, io);
1108 }
1109
1110 /*
1111   a handler for async trans2 replies
1112  */
1113 static void async_trans2(struct smbcli_request *c_req)
1114 {
1115         struct async_info *async = c_req->async.private_data;
1116         struct ntvfs_request *req = async->req;
1117         req->async_states->status = smb_raw_trans2_recv(c_req, req, async->parms);
1118         talloc_free(async);
1119         req->async_states->send_fn(req);
1120 }
1121
1122 /* raw trans2 */
1123 static NTSTATUS cvfs_trans2(struct ntvfs_module_context *ntvfs,
1124                             struct ntvfs_request *req,
1125                             struct smb_trans2 *trans2)
1126 {
1127         struct cvfs_private *p = ntvfs->private_data;
1128         struct smbcli_request *c_req;
1129
1130         if (p->map_trans2) {
1131                 return NT_STATUS_NOT_IMPLEMENTED;
1132         }
1133
1134         SETUP_PID;
1135
1136         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
1137                 return smb_raw_trans2(p->tree, req, trans2);
1138         }
1139
1140         c_req = smb_raw_trans2_send(p->tree, trans2);
1141
1142         ASYNC_RECV_TAIL(trans2, async_trans2);
1143 }
1144
1145
1146 /* SMBtrans - not used on file shares */
1147 static NTSTATUS cvfs_trans(struct ntvfs_module_context *ntvfs,
1148                            struct ntvfs_request *req,
1149                            struct smb_trans2 *trans2)
1150 {
1151         return NT_STATUS_ACCESS_DENIED;
1152 }
1153
1154 /*
1155   a handler for async change notify replies
1156  */
1157 static void async_changenotify(struct smbcli_request *c_req)
1158 {
1159         struct async_info *async = c_req->async.private_data;
1160         struct ntvfs_request *req = async->req;
1161         req->async_states->status = smb_raw_changenotify_recv(c_req, req, async->parms);
1162         talloc_free(async);
1163         req->async_states->send_fn(req);
1164 }
1165
1166 /* change notify request - always async */
1167 static NTSTATUS cvfs_notify(struct ntvfs_module_context *ntvfs,
1168                             struct ntvfs_request *req,
1169                             union smb_notify *io)
1170 {
1171         struct cvfs_private *p = ntvfs->private_data;
1172         struct smbcli_request *c_req;
1173         int saved_timeout = p->transport->options.request_timeout;
1174         struct cvfs_file *f;
1175
1176         if (io->nttrans.level != RAW_NOTIFY_NTTRANS) {
1177                 return NT_STATUS_NOT_IMPLEMENTED;
1178         }
1179
1180         SETUP_PID;
1181
1182         f = ntvfs_handle_get_backend_data(io->nttrans.in.file.ntvfs, ntvfs);
1183         if (!f) return NT_STATUS_INVALID_HANDLE;
1184         io->nttrans.in.file.fnum = f->fnum;
1185
1186         /* this request doesn't make sense unless its async */
1187         if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
1188                 return NT_STATUS_INVALID_PARAMETER;
1189         }
1190
1191         /* we must not timeout on notify requests - they wait
1192            forever */
1193         p->transport->options.request_timeout = 0;
1194
1195         c_req = smb_raw_changenotify_send(p->tree, io);
1196
1197         p->transport->options.request_timeout = saved_timeout;
1198
1199         ASYNC_RECV_TAIL(io, async_changenotify);
1200 }
1201
1202 /*
1203   initialise the CIFS->CIFS backend, registering ourselves with the ntvfs subsystem
1204  */
1205 NTSTATUS ntvfs_cifs_init(TALLOC_CTX *ctx)
1206 {
1207         NTSTATUS ret;
1208         struct ntvfs_ops ops;
1209         NTVFS_CURRENT_CRITICAL_SIZES(vers);
1210
1211         ZERO_STRUCT(ops);
1212
1213         /* fill in the name and type */
1214         ops.name = "cifs";
1215         ops.type = NTVFS_DISK;
1216
1217         /* fill in all the operations */
1218         ops.connect_fn = cvfs_connect;
1219         ops.disconnect_fn = cvfs_disconnect;
1220         ops.unlink_fn = cvfs_unlink;
1221         ops.chkpath_fn = cvfs_chkpath;
1222         ops.qpathinfo_fn = cvfs_qpathinfo;
1223         ops.setpathinfo_fn = cvfs_setpathinfo;
1224         ops.open_fn = cvfs_open;
1225         ops.mkdir_fn = cvfs_mkdir;
1226         ops.rmdir_fn = cvfs_rmdir;
1227         ops.rename_fn = cvfs_rename;
1228         ops.copy_fn = cvfs_copy;
1229         ops.ioctl_fn = cvfs_ioctl;
1230         ops.read_fn = cvfs_read;
1231         ops.write_fn = cvfs_write;
1232         ops.seek_fn = cvfs_seek;
1233         ops.flush_fn = cvfs_flush;
1234         ops.close_fn = cvfs_close;
1235         ops.exit_fn = cvfs_exit;
1236         ops.lock_fn = cvfs_lock;
1237         ops.setfileinfo_fn = cvfs_setfileinfo;
1238         ops.qfileinfo_fn = cvfs_qfileinfo;
1239         ops.fsinfo_fn = cvfs_fsinfo;
1240         ops.lpq_fn = cvfs_lpq;
1241         ops.search_first_fn = cvfs_search_first;
1242         ops.search_next_fn = cvfs_search_next;
1243         ops.search_close_fn = cvfs_search_close;
1244         ops.trans_fn = cvfs_trans;
1245         ops.logoff_fn = cvfs_logoff;
1246         ops.async_setup_fn = cvfs_async_setup;
1247         ops.cancel_fn = cvfs_cancel;
1248         ops.notify_fn = cvfs_notify;
1249         ops.trans2_fn = cvfs_trans2;
1250
1251         /* register ourselves with the NTVFS subsystem. We register
1252            under the name 'cifs'. */
1253         ret = ntvfs_register(&ops, &vers);
1254
1255         if (!NT_STATUS_IS_OK(ret)) {
1256                 DEBUG(0,("Failed to register CIFS backend!\n"));
1257         }
1258
1259         return ret;
1260 }