source3/smbd/globals.h

   1 /*
   2    Unix SMB/Netbios implementation.
   3    smbd globals
   4    Copyright (C) Stefan Metzmacher 2009
   5    Copyright (C) Jeremy Allison 2010
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "system/select.h"
  22
  23 #if defined(WITH_AIO)
  24 struct aio_extra;
  25 extern struct aio_extra *aio_list_head;
  26 extern struct tevent_signal *aio_signal_event;
  27 extern int aio_pending_size;
  28 extern int outstanding_aio_calls;
  29 #endif
  30
  31 #ifdef USE_DMAPI
  32 struct smbd_dmapi_context;
  33 extern struct smbd_dmapi_context *dmapi_ctx;
  34 #endif
  35
  36 extern bool dfree_broken;
  37
  38 /* how many write cache buffers have been allocated */
  39 extern unsigned int allocated_write_caches;
  40
  41 /* A singleton cache to speed up searching by dev/inode. */
  42 struct fsp_singleton_cache {
  43         files_struct *fsp;
  44         struct file_id id;
  45 };
  46
  47 extern const struct mangle_fns *mangle_fns;
  48
  49 extern unsigned char *chartest;
  50 extern TDB_CONTEXT *tdb_mangled_cache;
  51
  52 /*
  53   this determines how many characters are used from the original filename
  54   in the 8.3 mangled name. A larger value leads to a weaker hash and more collisions.
  55   The largest possible value is 6.
  56 */
  57 extern unsigned mangle_prefix;
  58
  59 struct msg_state;
  60 extern struct msg_state *smbd_msg_state;
  61
  62 extern bool logged_ioctl_message;
  63
  64 extern int trans_num;
  65
  66 extern time_t last_smb_conf_reload_time;
  67 extern time_t last_printer_reload_time;
  68 /****************************************************************************
  69  structure to hold a linked list of queued messages.
  70  for processing.
  71 ****************************************************************************/
  72 struct pending_message_list;
  73 extern struct pending_message_list *deferred_open_queue;
  74 extern uint32_t common_flags2;
  75
  76 struct smb_srv_trans_enc_ctx;
  77 extern struct smb_srv_trans_enc_ctx *partial_srv_trans_enc_ctx;
  78 extern struct smb_srv_trans_enc_ctx *srv_trans_enc_ctx;
  79
  80 struct sec_ctx {
  81         struct security_unix_token ut;
  82         struct security_token *token;
  83 };
  84 /* A stack of security contexts.  We include the current context as being
  85    the first one, so there is room for another MAX_SEC_CTX_DEPTH more. */
  86 extern struct sec_ctx sec_ctx_stack[MAX_SEC_CTX_DEPTH + 1];
  87 extern int sec_ctx_stack_ndx;
  88 extern bool become_uid_done;
  89 extern bool become_gid_done;
  90
  91 extern connection_struct *last_conn;
  92 extern uint16_t last_flags;
  93
  94 extern uint32_t global_client_caps;
  95
  96 extern uint16_t fnf_handle;
  97
  98 struct conn_ctx {
  99         connection_struct *conn;
 100         uint16 vuid;
 101 };
 102 /* A stack of current_user connection contexts. */
 103 extern struct conn_ctx conn_ctx_stack[MAX_SEC_CTX_DEPTH];
 104 extern int conn_ctx_stack_ndx;
 105
 106 struct vfs_init_function_entry;
 107 extern struct vfs_init_function_entry *backends;
 108 extern char *sparse_buf;
 109 extern char *LastDir;
 110
 111 /* Current number of oplocks we have outstanding. */
 112 extern int32_t exclusive_oplocks_open;
 113 extern int32_t level_II_oplocks_open;
 114 extern struct kernel_oplocks *koplocks;
 115
 116 extern int am_parent;
 117 extern struct event_context *smbd_event_ctx;
 118 extern struct messaging_context *smbd_msg_ctx;
 119 extern struct memcache *smbd_memcache_ctx;
 120 extern bool exit_firsttime;
 121 struct child_pid;
 122 extern struct child_pid *children;
 123 extern int num_children;
 124
 125 struct tstream_context;
 126 struct smbd_smb2_request;
 127 struct smbd_smb2_session;
 128 struct smbd_smb2_tcon;
 129
 130 DATA_BLOB negprot_spnego(TALLOC_CTX *ctx, struct smbd_server_connection *sconn);
 131
 132 void smbd_lock_socket(struct smbd_server_connection *sconn);
 133 void smbd_unlock_socket(struct smbd_server_connection *sconn);
 134
 135 NTSTATUS smb2_signing_sign_pdu(DATA_BLOB session_key,
 136                                struct iovec *vector,
 137                                int count);
 138 NTSTATUS smb2_signing_check_pdu(DATA_BLOB session_key,
 139                                 const struct iovec *vector,
 140                                 int count);
 141
 142 NTSTATUS smbd_do_locking(struct smb_request *req,
 143                          files_struct *fsp,
 144                          uint8_t type,
 145                          int32_t timeout,
 146                          uint16_t num_ulocks,
 147                          struct smbd_lock_element *ulocks,
 148                          uint16_t num_locks,
 149                          struct smbd_lock_element *locks,
 150                          bool *async);
 151
 152 NTSTATUS smbd_do_qfilepathinfo(connection_struct *conn,
 153                                TALLOC_CTX *mem_ctx,
 154                                uint16_t info_level,
 155                                files_struct *fsp,
 156                                struct smb_filename *smb_fname,
 157                                bool delete_pending,
 158                                struct timespec write_time_ts,
 159                                struct ea_list *ea_list,
 160                                int lock_data_count,
 161                                char *lock_data,
 162                                uint16_t flags2,
 163                                unsigned int max_data_bytes,
 164                                char **ppdata,
 165                                unsigned int *pdata_size);
 166
 167 NTSTATUS smbd_do_setfilepathinfo(connection_struct *conn,
 168                                 struct smb_request *req,
 169                                 TALLOC_CTX *mem_ctx,
 170                                 uint16_t info_level,
 171                                 files_struct *fsp,
 172                                 struct smb_filename *smb_fname,
 173                                 char **ppdata, int total_data,
 174                                 int *ret_data_size);
 175
 176 NTSTATUS smbd_do_qfsinfo(connection_struct *conn,
 177                          TALLOC_CTX *mem_ctx,
 178                          uint16_t info_level,
 179                          uint16_t flags2,
 180                          unsigned int max_data_bytes,
 181                          char **ppdata,
 182                          int *ret_data_len);
 183
 184 bool smbd_dirptr_get_entry(TALLOC_CTX *ctx,
 185                            struct dptr_struct *dirptr,
 186                            const char *mask,
 187                            uint32_t dirtype,
 188                            bool dont_descend,
 189                            bool ask_sharemode,
 190                            bool (*match_fn)(TALLOC_CTX *ctx,
 191                                             void *private_data,
 192                                             const char *dname,
 193                                             const char *mask,
 194                                             char **_fname),
 195                            bool (*mode_fn)(TALLOC_CTX *ctx,
 196                                            void *private_data,
 197                                            struct smb_filename *smb_fname,
 198                                            uint32_t *_mode),
 199                            void *private_data,
 200                            char **_fname,
 201                            struct smb_filename **_smb_fname,
 202                            uint32_t *_mode,
 203                            long *_prev_offset);
 204
 205 bool smbd_dirptr_lanman2_entry(TALLOC_CTX *ctx,
 206                                connection_struct *conn,
 207                                struct dptr_struct *dirptr,
 208                                uint16 flags2,
 209                                const char *path_mask,
 210                                uint32 dirtype,
 211                                int info_level,
 212                                int requires_resume_key,
 213                                bool dont_descend,
 214                                bool ask_sharemode,
 215                                uint8_t align,
 216                                bool do_pad,
 217                                char **ppdata,
 218                                char *base_data,
 219                                char *end_data,
 220                                int space_remaining,
 221                                bool *out_of_space,
 222                                bool *got_exact_match,
 223                                int *_last_entry_off,
 224                                struct ea_list *name_list);
 225
 226 NTSTATUS smbd_check_open_rights(struct connection_struct *conn,
 227                                 const struct smb_filename *smb_fname,
 228                                 uint32_t access_mask,
 229                                 uint32_t *access_granted);
 230
 231 void smbd_notify_cancel_by_smbreq(const struct smb_request *smbreq);
 232
 233 void smbd_server_connection_terminate_ex(struct smbd_server_connection *sconn,
 234                                          const char *reason,
 235                                          const char *location);
 236 #define smbd_server_connection_terminate(sconn, reason) \
 237         smbd_server_connection_terminate_ex(sconn, reason, __location__)
 238
 239 struct server_id sconn_server_id(const struct smbd_server_connection *sconn);
 240
 241 const char *smb2_opcode_name(uint16_t opcode);
 242 bool smbd_is_smb2_header(const uint8_t *inbuf, size_t size);
 243
 244 void reply_smb2002(struct smb_request *req, uint16_t choice);
 245 void smbd_smb2_first_negprot(struct smbd_server_connection *sconn,
 246                              const uint8_t *inbuf, size_t size);
 247
 248 NTSTATUS smbd_smb2_request_error_ex(struct smbd_smb2_request *req,
 249                                     NTSTATUS status,
 250                                     DATA_BLOB *info,
 251                                     const char *location);
 252 #define smbd_smb2_request_error(req, status) \
 253         smbd_smb2_request_error_ex(req, status, NULL, __location__)
 254 NTSTATUS smbd_smb2_request_done_ex(struct smbd_smb2_request *req,
 255                                    NTSTATUS status,
 256                                    DATA_BLOB body, DATA_BLOB *dyn,
 257                                    const char *location);
 258 #define smbd_smb2_request_done(req, body, dyn) \
 259         smbd_smb2_request_done_ex(req, NT_STATUS_OK, body, dyn, __location__)
 260
 261 NTSTATUS smbd_smb2_send_oplock_break(struct smbd_server_connection *sconn,
 262                                      uint64_t file_id_persistent,
 263                                      uint64_t file_id_volatile,
 264                                      uint8_t oplock_level);
 265
 266 NTSTATUS smbd_smb2_request_pending_queue(struct smbd_smb2_request *req,
 267                                          struct tevent_req *subreq);
 268
 269 NTSTATUS smbd_smb2_request_check_session(struct smbd_smb2_request *req);
 270 NTSTATUS smbd_smb2_request_check_tcon(struct smbd_smb2_request *req);
 271
 272 struct smb_request *smbd_smb2_fake_smb_request(struct smbd_smb2_request *req);
 273 void remove_smb2_chained_fsp(files_struct *fsp);
 274
 275 NTSTATUS smbd_smb2_request_process_negprot(struct smbd_smb2_request *req);
 276 NTSTATUS smbd_smb2_request_process_sesssetup(struct smbd_smb2_request *req);
 277 NTSTATUS smbd_smb2_request_process_logoff(struct smbd_smb2_request *req);
 278 NTSTATUS smbd_smb2_request_process_tcon(struct smbd_smb2_request *req);
 279 NTSTATUS smbd_smb2_request_process_tdis(struct smbd_smb2_request *req);
 280 NTSTATUS smbd_smb2_request_process_create(struct smbd_smb2_request *req);
 281 NTSTATUS smbd_smb2_request_process_close(struct smbd_smb2_request *req);
 282 NTSTATUS smbd_smb2_request_process_flush(struct smbd_smb2_request *req);
 283 NTSTATUS smbd_smb2_request_process_read(struct smbd_smb2_request *req);
 284 NTSTATUS smb2_read_complete(struct tevent_req *req, ssize_t nread, int err);
 285 NTSTATUS smbd_smb2_request_process_write(struct smbd_smb2_request *req);
 286 NTSTATUS smb2_write_complete(struct tevent_req *req, ssize_t nwritten, int err);
 287 NTSTATUS smbd_smb2_request_process_lock(struct smbd_smb2_request *req);
 288 NTSTATUS smbd_smb2_request_process_ioctl(struct smbd_smb2_request *req);
 289 NTSTATUS smbd_smb2_request_process_keepalive(struct smbd_smb2_request *req);
 290 NTSTATUS smbd_smb2_request_process_find(struct smbd_smb2_request *req);
 291 NTSTATUS smbd_smb2_request_process_notify(struct smbd_smb2_request *req);
 292 NTSTATUS smbd_smb2_request_process_getinfo(struct smbd_smb2_request *req);
 293 NTSTATUS smbd_smb2_request_process_setinfo(struct smbd_smb2_request *req);
 294 NTSTATUS smbd_smb2_request_process_break(struct smbd_smb2_request *req);
 295 NTSTATUS smbd_smb2_request_dispatch(struct smbd_smb2_request *req);
 296 void smbd_smb2_request_dispatch_immediate(struct tevent_context *ctx,
 297                                 struct tevent_immediate *im,
 298                                 void *private_data);
 299
 300 /* SMB1 -> SMB2 glue. */
 301 void send_break_message_smb2(files_struct *fsp, int level);
 302 struct blocking_lock_record *get_pending_smb2req_blr(struct smbd_smb2_request *smb2req);
 303 bool push_blocking_lock_request_smb2( struct byte_range_lock *br_lck,
 304                                 struct smb_request *req,
 305                                 files_struct *fsp,
 306                                 int lock_timeout,
 307                                 int lock_num,
 308                                 uint64_t smblctx,
 309                                 enum brl_type lock_type,
 310                                 enum brl_flavour lock_flav,
 311                                 uint64_t offset,
 312                                 uint64_t count,
 313                                 uint64_t blocking_smblctx);
 314 void process_blocking_lock_queue_smb2(
 315         struct smbd_server_connection *sconn, struct timeval tv_curr);
 316 void cancel_pending_lock_requests_by_fid_smb2(files_struct *fsp,
 317                         struct byte_range_lock *br_lck,
 318                         enum file_close_type close_type);
 319 /* From smbd/smb2_create.c */
 320 int map_smb2_oplock_levels_to_samba(uint8_t in_oplock_level);
 321 bool get_deferred_open_message_state_smb2(struct smbd_smb2_request *smb2req,
 322                         struct timeval *p_request_time,
 323                         void **pp_state);
 324 bool open_was_deferred_smb2(struct smbd_server_connection *sconn,
 325                             uint64_t mid);
 326 void remove_deferred_open_message_smb2(
 327         struct smbd_server_connection *sconn, uint64_t mid);
 328 void schedule_deferred_open_message_smb2(
 329         struct smbd_server_connection *sconn, uint64_t mid);
 330 bool push_deferred_open_message_smb2(struct smbd_smb2_request *smb2req,
 331                         struct timeval request_time,
 332                         struct timeval timeout,
 333                         struct file_id id,
 334                         char *private_data,
 335                         size_t priv_len);
 336
 337 struct smbd_smb2_request {
 338         struct smbd_smb2_request *prev, *next;
 339
 340         TALLOC_CTX *mem_pool;
 341         struct smbd_smb2_request **parent;
 342
 343         struct smbd_server_connection *sconn;
 344
 345         /* the session the request operates on, maybe NULL */
 346         struct smbd_smb2_session *session;
 347
 348         /* the tcon the request operates on, maybe NULL */
 349         struct smbd_smb2_tcon *tcon;
 350
 351         int current_idx;
 352         bool do_signing;
 353         bool async;
 354         bool cancelled;
 355
 356         /* fake smb1 request. */
 357         struct smb_request *smb1req;
 358         struct files_struct *compat_chain_fsp;
 359
 360         NTSTATUS next_status;
 361
 362         /*
 363          * The sub request for async backend calls.
 364          * This is used for SMB2 Cancel.
 365          */
 366         struct tevent_req *subreq;
 367
 368         struct {
 369                 /* the NBT header is not allocated */
 370                 uint8_t nbt_hdr[4];
 371                 /*
 372                  * vector[0] NBT
 373                  * .
 374                  * vector[1] SMB2
 375                  * vector[2] fixed body
 376                  * vector[3] dynamic body
 377                  * .
 378                  * .
 379                  * .
 380                  * vector[4] SMB2
 381                  * vector[5] fixed body
 382                  * vector[6] dynamic body
 383                  * .
 384                  * .
 385                  * .
 386                  */
 387                 struct iovec *vector;
 388                 int vector_count;
 389         } in;
 390         struct {
 391                 /* the NBT header is not allocated */
 392                 uint8_t nbt_hdr[4];
 393                 /*
 394                  * vector[0] NBT
 395                  * .
 396                  * vector[1] SMB2
 397                  * vector[2] fixed body
 398                  * vector[3] dynamic body
 399                  * .
 400                  * .
 401                  * .
 402                  * vector[4] SMB2
 403                  * vector[5] fixed body
 404                  * vector[6] dynamic body
 405                  * .
 406                  * .
 407                  * .
 408                  */
 409                 struct iovec *vector;
 410                 int vector_count;
 411         } out;
 412 };
 413
 414 struct smbd_server_connection;
 415
 416 struct smbd_smb2_session {
 417         struct smbd_smb2_session *prev, *next;
 418         struct smbd_server_connection *sconn;
 419         NTSTATUS status;
 420         uint64_t vuid;
 421         struct auth_ntlmssp_state *auth_ntlmssp_state;
 422         struct auth_serversupplied_info *session_info;
 423         DATA_BLOB session_key;
 424         bool do_signing;
 425
 426         user_struct *compat_vuser;
 427
 428         struct {
 429                 /* an id tree used to allocate tids */
 430                 struct idr_context *idtree;
 431
 432                 /* this is the limit of tid values for this connection */
 433                 uint32_t limit;
 434
 435                 struct smbd_smb2_tcon *list;
 436         } tcons;
 437 };
 438
 439 struct smbd_smb2_tcon {
 440         struct smbd_smb2_tcon *prev, *next;
 441         struct smbd_smb2_session *session;
 442         uint32_t tid;
 443         int snum;
 444         connection_struct *compat_conn;
 445 };
 446
 447 struct pending_auth_data;
 448
 449 struct smbd_server_connection {
 450         int sock;
 451         struct client_address client_id;
 452         const struct tsocket_address *local_address;
 453         const struct tsocket_address *remote_address;
 454         struct messaging_context *msg_ctx;
 455         struct {
 456                 bool got_session;
 457         } nbt;
 458         bool using_smb2;
 459         int trans_num;
 460
 461         /*
 462          * Cache for calling poll(2) to avoid allocations in our
 463          * central event loop
 464          */
 465         struct pollfd *pfds;
 466
 467         struct files_struct *files;
 468         struct bitmap *file_bmap;
 469         int real_max_open_files;
 470         int files_used;
 471         struct fsp_singleton_cache fsp_fi_cache;
 472         unsigned long file_gen_counter;
 473         int first_file;
 474
 475         /* number of open connections (tcons) */
 476         int num_tcons_open;
 477
 478         /* open directory handles. */
 479         struct {
 480                 struct bitmap *dptr_bmap;
 481                 struct dptr_struct *dirptrs;
 482                 int dirhandles_open;
 483         } searches;
 484
 485         struct {
 486                 struct fd_event *fde;
 487
 488                 struct {
 489                         /*
 490                          * fd for the fcntl lock mutexing access to our sock
 491                          */
 492                         int socket_lock_fd;
 493
 494                         /*
 495                          * fd for the trusted pipe from
 496                          * echo handler child
 497                          */
 498                         int trusted_fd;
 499
 500                         /*
 501                          * fde for the trusted_fd
 502                          */
 503                         struct fd_event *trusted_fde;
 504
 505                         /*
 506                          * Reference count for the fcntl lock to
 507                          * allow recursive locks.
 508                          */
 509                         int ref_count;
 510                 } echo_handler;
 511
 512                 uint64_t num_requests;
 513                 struct {
 514                         bool encrypted_passwords;
 515                         bool spnego;
 516                         struct auth_context *auth_context;
 517                         bool done;
 518                         /*
 519                          * Size of the data we can receive. Set by us.
 520                          * Can be modified by the max xmit parameter.
 521                          */
 522                         int max_recv;
 523                 } negprot;
 524
 525                 struct {
 526                         bool done_sesssetup;
 527                         /*
 528                          * Size of data we can send to client. Set
 529                          *  by the client for all protocols above CORE.
 530                          *  Set by us for CORE protocol.
 531                          */
 532                         int max_send;
 533                         uint16_t last_session_tag;
 534
 535                         /* users from session setup */
 536                         char *session_userlist;
 537                         /* workgroup from session setup. */
 538                         char *session_workgroup;
 539                         /*
 540                          * this holds info on user ids that are already
 541                          * validated for this VC
 542                          */
 543                         user_struct *validated_users;
 544                         uint16_t next_vuid;
 545                         int num_validated_vuids;
 546                 } sessions;
 547                 struct {
 548                         connection_struct *Connections;
 549                         /* number of open connections */
 550                         struct bitmap *bmap;
 551                 } tcons;
 552                 struct smb_signing_state *signing_state;
 553                 /* List to store partial SPNEGO auth fragments. */
 554                 struct pending_auth_data *pd_list;
 555
 556                 struct notify_mid_map *notify_mid_maps;
 557
 558                 struct {
 559                         /* dlink list we store pending lock records on. */
 560                         struct blocking_lock_record *blocking_lock_queue;
 561                         /* dlink list we move cancelled lock records onto. */
 562                         struct blocking_lock_record *blocking_lock_cancelled_queue;
 563
 564                         /* The event that makes us process our blocking lock queue */
 565                         struct timed_event *brl_timeout;
 566
 567                         bool blocking_lock_unlock_state;
 568                         bool blocking_lock_cancel_state;
 569                 } locks;
 570         } smb1;
 571         struct {
 572                 struct tevent_context *event_ctx;
 573                 struct tevent_queue *recv_queue;
 574                 struct tevent_queue *send_queue;
 575                 struct tstream_context *stream;
 576                 struct {
 577                         /* an id tree used to allocate vuids */
 578                         /* this holds info on session vuids that are already
 579                          * validated for this VC */
 580                         struct idr_context *idtree;
 581
 582                         /* this is the limit of vuid values for this connection */
 583                         uint64_t limit;
 584
 585                         struct smbd_smb2_session *list;
 586                 } sessions;
 587                 struct {
 588                         /* The event that makes us process our blocking lock queue */
 589                         struct timed_event *brl_timeout;
 590                         bool blocking_lock_unlock_state;
 591                 } locks;
 592                 struct smbd_smb2_request *requests;
 593                 uint64_t seqnum_low;
 594                 uint32_t credits_granted;
 595                 uint32_t max_credits;
 596                 struct bitmap *credits_bitmap;
 597         } smb2;
 598 };
 599
 600 extern struct smbd_server_connection *smbd_server_conn;
 601
 602 struct smbd_server_connection *msg_ctx_to_sconn(struct messaging_context *msg_ctx);
 603
 604 void smbd_init_globals(void);