source4/ntvfs/cifs/vfs_cifs.c

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