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