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 #if defined(WITH_AIO)
  22 struct aio_extra;
  23 extern struct aio_extra *aio_list_head;
  24 extern struct tevent_signal *aio_signal_event;
  25 extern int aio_pending_size;
  26 extern int outstanding_aio_calls;
  27 #endif
  28
  29 #ifdef USE_DMAPI
  30 struct smbd_dmapi_context;
  31 extern struct smbd_dmapi_context *dmapi_ctx;
  32 #endif
  33
  34 extern bool dfree_broken;
  35
  36 /* how many write cache buffers have been allocated */
  37 extern unsigned int allocated_write_caches;
  38
  39 extern int real_max_open_files;
  40 extern struct bitmap *file_bmap;
  41 extern files_struct *Files;
  42 extern int files_used;
  43 /* A singleton cache to speed up searching by dev/inode. */
  44 struct fsp_singleton_cache {
  45         files_struct *fsp;
  46         struct file_id id;
  47 };
  48 extern struct fsp_singleton_cache fsp_fi_cache;
  49 extern unsigned long file_gen_counter;
  50 extern int first_file;
  51
  52 extern const struct mangle_fns *mangle_fns;
  53
  54 extern unsigned char *chartest;
  55 extern TDB_CONTEXT *tdb_mangled_cache;
  56
  57 /* these tables are used to provide fast tests for characters */
  58 extern unsigned char char_flags[256];
  59 /*
  60   this determines how many characters are used from the original filename
  61   in the 8.3 mangled name. A larger value leads to a weaker hash and more collisions.
  62   The largest possible value is 6.
  63 */
  64 extern unsigned mangle_prefix;
  65 extern unsigned char base_reverse[256];
  66
  67 extern char *last_from;
  68 extern char *last_to;
  69
  70 struct msg_state;
  71 extern struct msg_state *smbd_msg_state;
  72
  73 extern bool logged_ioctl_message;
  74
  75 extern int trans_num;
  76
  77 extern pid_t mypid;
  78 extern time_t last_smb_conf_reload_time;
  79 extern time_t last_printer_reload_time;
  80 /****************************************************************************
  81  structure to hold a linked list of queued messages.
  82  for processing.
  83 ****************************************************************************/
  84 struct pending_message_list;
  85 extern struct pending_message_list *deferred_open_queue;
  86 extern uint32_t common_flags2;
  87
  88 struct smb_srv_trans_enc_ctx;
  89 extern struct smb_srv_trans_enc_ctx *partial_srv_trans_enc_ctx;
  90 extern struct smb_srv_trans_enc_ctx *srv_trans_enc_ctx;
  91
  92 struct sec_ctx {
  93         UNIX_USER_TOKEN ut;
  94         NT_USER_TOKEN *token;
  95 };
  96 /* A stack of security contexts.  We include the current context as being
  97    the first one, so there is room for another MAX_SEC_CTX_DEPTH more. */
  98 extern struct sec_ctx sec_ctx_stack[MAX_SEC_CTX_DEPTH + 1];
  99 extern int sec_ctx_stack_ndx;
 100 extern bool become_uid_done;
 101 extern bool become_gid_done;
 102
 103 extern connection_struct *last_conn;
 104 extern uint16_t last_flags;
 105
 106 extern uint32_t global_client_caps;
 107
 108 extern uint16_t fnf_handle;
 109
 110 struct conn_ctx {
 111         connection_struct *conn;
 112         uint16 vuid;
 113 };
 114 /* A stack of current_user connection contexts. */
 115 extern struct conn_ctx conn_ctx_stack[MAX_SEC_CTX_DEPTH];
 116 extern int conn_ctx_stack_ndx;
 117
 118 struct vfs_init_function_entry;
 119 extern struct vfs_init_function_entry *backends;
 120 extern char *sparse_buf;
 121
 122 /* Current number of oplocks we have outstanding. */
 123 extern int32_t exclusive_oplocks_open;
 124 extern int32_t level_II_oplocks_open;
 125 extern bool global_client_failed_oplock_break;
 126 extern struct kernel_oplocks *koplocks;
 127
 128 extern int am_parent;
 129 extern int server_fd;
 130 extern struct event_context *smbd_event_ctx;
 131 extern struct messaging_context *smbd_msg_ctx;
 132 extern struct memcache *smbd_memcache_ctx;
 133 extern bool exit_firsttime;
 134 struct child_pid;
 135 extern struct child_pid *children;
 136 extern int num_children;
 137
 138 struct tstream_context;
 139 struct smbd_smb2_request;
 140 struct smbd_smb2_session;
 141 struct smbd_smb2_tcon;
 142
 143 DATA_BLOB negprot_spnego(void);
 144
 145 void smbd_lock_socket(struct smbd_server_connection *sconn);
 146 void smbd_unlock_socket(struct smbd_server_connection *sconn);
 147
 148 NTSTATUS smb2_signing_sign_pdu(DATA_BLOB session_key,
 149                                struct iovec *vector,
 150                                int count);
 151 NTSTATUS smb2_signing_check_pdu(DATA_BLOB session_key,
 152                                 const struct iovec *vector,
 153                                 int count);
 154
 155 NTSTATUS smbd_do_locking(struct smb_request *req,
 156                          files_struct *fsp,
 157                          uint8_t type,
 158                          int32_t timeout,
 159                          uint16_t num_ulocks,
 160                          struct smbd_lock_element *ulocks,
 161                          uint16_t num_locks,
 162                          struct smbd_lock_element *locks,
 163                          bool *async);
 164
 165 NTSTATUS smbd_do_qfilepathinfo(connection_struct *conn,
 166                                TALLOC_CTX *mem_ctx,
 167                                uint16_t info_level,
 168                                files_struct *fsp,
 169                                struct smb_filename *smb_fname,
 170                                bool delete_pending,
 171                                struct timespec write_time_ts,
 172                                struct ea_list *ea_list,
 173                                int lock_data_count,
 174                                char *lock_data,
 175                                uint16_t flags2,
 176                                unsigned int max_data_bytes,
 177                                char **ppdata,
 178                                unsigned int *pdata_size);
 179
 180 NTSTATUS smbd_do_setfilepathinfo(connection_struct *conn,
 181                                 struct smb_request *req,
 182                                 TALLOC_CTX *mem_ctx,
 183                                 uint16_t info_level,
 184                                 files_struct *fsp,
 185                                 struct smb_filename *smb_fname,
 186                                 char **ppdata, int total_data,
 187                                 int *ret_data_size);
 188
 189 NTSTATUS smbd_do_qfsinfo(connection_struct *conn,
 190                          TALLOC_CTX *mem_ctx,
 191                          uint16_t info_level,
 192                          uint16_t flags2,
 193                          unsigned int max_data_bytes,
 194                          char **ppdata,
 195                          int *ret_data_len);
 196
 197 bool smbd_dirptr_get_entry(TALLOC_CTX *ctx,
 198                            struct dptr_struct *dirptr,
 199                            const char *mask,
 200                            uint32_t dirtype,
 201                            bool dont_descend,
 202                            bool ask_sharemode,
 203                            bool (*match_fn)(TALLOC_CTX *ctx,
 204                                             void *private_data,
 205                                             const char *dname,
 206                                             const char *mask,
 207                                             char **_fname),
 208                            bool (*mode_fn)(TALLOC_CTX *ctx,
 209                                            void *private_data,
 210                                            struct smb_filename *smb_fname,
 211                                            uint32_t *_mode),
 212                            void *private_data,
 213                            char **_fname,
 214                            struct smb_filename **_smb_fname,
 215                            uint32_t *_mode,
 216                            long *_prev_offset);
 217
 218 bool smbd_dirptr_lanman2_entry(TALLOC_CTX *ctx,
 219                                connection_struct *conn,
 220                                struct dptr_struct *dirptr,
 221                                uint16 flags2,
 222                                const char *path_mask,
 223                                uint32 dirtype,
 224                                int info_level,
 225                                int requires_resume_key,
 226                                bool dont_descend,
 227                                bool ask_sharemode,
 228                                uint8_t align,
 229                                bool do_pad,
 230                                char **ppdata,
 231                                char *base_data,
 232                                char *end_data,
 233                                int space_remaining,
 234                                bool *out_of_space,
 235                                bool *got_exact_match,
 236                                int *_last_entry_off,
 237                                struct ea_list *name_list);
 238
 239 NTSTATUS smbd_check_open_rights(struct connection_struct *conn,
 240                                 const struct smb_filename *smb_fname,
 241                                 uint32_t access_mask,
 242                                 uint32_t *access_granted);
 243
 244 void smbd_notify_cancel_by_smbreq(struct smbd_server_connection *sconn,
 245                                   const struct smb_request *smbreq);
 246
 247 void smbd_server_connection_terminate_ex(struct smbd_server_connection *sconn,
 248                                          const char *reason,
 249                                          const char *location);
 250 #define smbd_server_connection_terminate(sconn, reason) \
 251         smbd_server_connection_terminate_ex(sconn, reason, __location__)
 252
 253 bool smbd_is_smb2_header(const uint8_t *inbuf, size_t size);
 254
 255 void reply_smb2002(struct smb_request *req, uint16_t choice);
 256 void smbd_smb2_first_negprot(struct smbd_server_connection *sconn,
 257                              const uint8_t *inbuf, size_t size);
 258
 259 NTSTATUS smbd_smb2_request_error_ex(struct smbd_smb2_request *req,
 260                                     NTSTATUS status,
 261                                     DATA_BLOB *info,
 262                                     const char *location);
 263 #define smbd_smb2_request_error(req, status) \
 264         smbd_smb2_request_error_ex(req, status, NULL, __location__)
 265 NTSTATUS smbd_smb2_request_done_ex(struct smbd_smb2_request *req,
 266                                    NTSTATUS status,
 267                                    DATA_BLOB body, DATA_BLOB *dyn,
 268                                    const char *location);
 269 #define smbd_smb2_request_done(req, body, dyn) \
 270         smbd_smb2_request_done_ex(req, NT_STATUS_OK, body, dyn, __location__)
 271
 272 NTSTATUS smbd_smb2_send_oplock_break(struct smbd_server_connection *sconn,
 273                                      uint64_t file_id_volatile,
 274                                      uint8_t oplock_level);
 275
 276 NTSTATUS smbd_smb2_request_pending_queue(struct smbd_smb2_request *req,
 277                                          struct tevent_req *subreq);
 278
 279 NTSTATUS smbd_smb2_request_check_session(struct smbd_smb2_request *req);
 280 NTSTATUS smbd_smb2_request_check_tcon(struct smbd_smb2_request *req);
 281
 282 struct smb_request *smbd_smb2_fake_smb_request(struct smbd_smb2_request *req);
 283
 284 NTSTATUS smbd_smb2_request_process_negprot(struct smbd_smb2_request *req);
 285 NTSTATUS smbd_smb2_request_process_sesssetup(struct smbd_smb2_request *req);
 286 NTSTATUS smbd_smb2_request_process_logoff(struct smbd_smb2_request *req);
 287 NTSTATUS smbd_smb2_request_process_tcon(struct smbd_smb2_request *req);
 288 NTSTATUS smbd_smb2_request_process_tdis(struct smbd_smb2_request *req);
 289 NTSTATUS smbd_smb2_request_process_create(struct smbd_smb2_request *req);
 290 NTSTATUS smbd_smb2_request_process_close(struct smbd_smb2_request *req);
 291 NTSTATUS smbd_smb2_request_process_flush(struct smbd_smb2_request *req);
 292 NTSTATUS smbd_smb2_request_process_read(struct smbd_smb2_request *req);
 293 NTSTATUS smbd_smb2_request_process_write(struct smbd_smb2_request *req);
 294 NTSTATUS smbd_smb2_request_process_lock(struct smbd_smb2_request *req);
 295 NTSTATUS smbd_smb2_request_process_ioctl(struct smbd_smb2_request *req);
 296 NTSTATUS smbd_smb2_request_process_keepalive(struct smbd_smb2_request *req);
 297 NTSTATUS smbd_smb2_request_process_find(struct smbd_smb2_request *req);
 298 NTSTATUS smbd_smb2_request_process_notify(struct smbd_smb2_request *req);
 299 NTSTATUS smbd_smb2_request_process_getinfo(struct smbd_smb2_request *req);
 300 NTSTATUS smbd_smb2_request_process_setinfo(struct smbd_smb2_request *req);
 301 NTSTATUS smbd_smb2_request_process_break(struct smbd_smb2_request *req);
 302 NTSTATUS smbd_smb2_request_dispatch(struct smbd_smb2_request *req);
 303 void smbd_smb2_request_dispatch_immediate(struct tevent_context *ctx,
 304                                 struct tevent_immediate *im,
 305                                 void *private_data);
 306
 307 /* SMB1 -> SMB2 glue. */
 308 void send_break_message_smb2(files_struct *fsp, int level);
 309 struct blocking_lock_record *get_pending_smb2req_blr(struct smbd_smb2_request *smb2req);
 310 bool push_blocking_lock_request_smb2( struct byte_range_lock *br_lck,
 311                                 struct smb_request *req,
 312                                 files_struct *fsp,
 313                                 int lock_timeout,
 314                                 int lock_num,
 315                                 uint64_t smblctx,
 316                                 enum brl_type lock_type,
 317                                 enum brl_flavour lock_flav,
 318                                 uint64_t offset,
 319                                 uint64_t count,
 320                                 uint64_t blocking_smblctx);
 321 void process_blocking_lock_queue_smb2(struct timeval tv_curr);
 322 void cancel_pending_lock_requests_by_fid_smb2(files_struct *fsp,
 323                         struct byte_range_lock *br_lck,
 324                         enum file_close_type close_type);
 325 /* From smbd/smb2_create.c */
 326 int map_smb2_oplock_levels_to_samba(uint8_t in_oplock_level);
 327 uint8_t map_samba_oplock_levels_to_smb2(int oplock_type);
 328 bool get_deferred_open_message_state_smb2(struct smbd_smb2_request *smb2req,
 329                         struct timeval *p_request_time,
 330                         void **pp_state);
 331 bool open_was_deferred_smb2(uint64_t mid);
 332 void remove_deferred_open_message_smb2(uint64_t mid);
 333 void schedule_deferred_open_message_smb2(uint64_t mid);
 334 bool push_deferred_open_message_smb2(struct smbd_smb2_request *smb2req,
 335                         struct timeval request_time,
 336                         struct timeval timeout,
 337                         struct file_id id,
 338                         char *private_data,
 339                         size_t priv_len);
 340
 341 struct smbd_smb2_request {
 342         struct smbd_smb2_request *prev, *next;
 343
 344         TALLOC_CTX *mem_pool;
 345         struct smbd_smb2_request **parent;
 346
 347         struct smbd_server_connection *sconn;
 348
 349         /* the session the request operates on, maybe NULL */
 350         struct smbd_smb2_session *session;
 351
 352         /* the tcon the request operates on, maybe NULL */
 353         struct smbd_smb2_tcon *tcon;
 354
 355         int current_idx;
 356         bool do_signing;
 357         bool async;
 358         bool cancelled;
 359
 360         struct files_struct *compat_chain_fsp;
 361
 362         NTSTATUS next_status;
 363
 364         /*
 365          * The sub request for async backend calls.
 366          * This is used for SMB2 Cancel.
 367          */
 368         struct tevent_req *subreq;
 369
 370         struct {
 371                 /* the NBT header is not allocated */
 372                 uint8_t nbt_hdr[4];
 373                 /*
 374                  * vector[0] NBT
 375                  * .
 376                  * vector[1] SMB2
 377                  * vector[2] fixed body
 378                  * vector[3] dynamic body
 379                  * .
 380                  * .
 381                  * .
 382                  * vector[4] SMB2
 383                  * vector[5] fixed body
 384                  * vector[6] dynamic body
 385                  * .
 386                  * .
 387                  * .
 388                  */
 389                 struct iovec *vector;
 390                 int vector_count;
 391         } in;
 392         struct {
 393                 /* the NBT header is not allocated */
 394                 uint8_t nbt_hdr[4];
 395                 /*
 396                  * vector[0] NBT
 397                  * .
 398                  * vector[1] SMB2
 399                  * vector[2] fixed body
 400                  * vector[3] dynamic body
 401                  * .
 402                  * .
 403                  * .
 404                  * vector[4] SMB2
 405                  * vector[5] fixed body
 406                  * vector[6] dynamic body
 407                  * .
 408                  * .
 409                  * .
 410                  */
 411                 struct iovec *vector;
 412                 int vector_count;
 413         } out;
 414 };
 415
 416 struct smbd_server_connection;
 417
 418 struct smbd_smb2_session {
 419         struct smbd_smb2_session *prev, *next;
 420         struct smbd_server_connection *sconn;
 421         NTSTATUS status;
 422         uint64_t vuid;
 423         AUTH_NTLMSSP_STATE *auth_ntlmssp_state;
 424         struct auth_serversupplied_info *server_info;
 425         DATA_BLOB session_key;
 426         bool do_signing;
 427
 428         user_struct *compat_vuser;
 429
 430         struct {
 431                 /* an id tree used to allocate tids */
 432                 struct idr_context *idtree;
 433
 434                 /* this is the limit of tid values for this connection */
 435                 uint32_t limit;
 436
 437                 struct smbd_smb2_tcon *list;
 438         } tcons;
 439 };
 440
 441 struct smbd_smb2_tcon {
 442         struct smbd_smb2_tcon *prev, *next;
 443         struct smbd_smb2_session *session;
 444         uint32_t tid;
 445         int snum;
 446         connection_struct *compat_conn;
 447 };
 448
 449 struct pending_auth_data;
 450
 451 struct smbd_server_connection {
 452         const struct tsocket_address *local_address;
 453         const struct tsocket_address *remote_address;
 454         struct {
 455                 bool got_session;
 456         } nbt;
 457         bool allow_smb2;
 458         struct {
 459                 struct fd_event *fde;
 460
 461                 struct {
 462                         /*
 463                          * fd for the fcntl lock mutexing access to smbd_server_fd
 464                          */
 465                         int socket_lock_fd;
 466
 467                         /*
 468                          * fd for the trusted pipe from
 469                          * echo handler child
 470                          */
 471                         int trusted_fd;
 472
 473                         /*
 474                          * fde for the trusted_fd
 475                          */
 476                         struct fd_event *trusted_fde;
 477
 478                         /*
 479                          * Reference count for the fcntl lock to
 480                          * allow recursive locks.
 481                          */
 482                         int ref_count;
 483                 } echo_handler;
 484
 485                 uint64_t num_requests;
 486                 struct {
 487                         bool encrypted_passwords;
 488                         bool spnego;
 489                         struct auth_context *auth_context;
 490                         bool done;
 491                         /*
 492                          * Size of the data we can receive. Set by us.
 493                          * Can be modified by the max xmit parameter.
 494                          */
 495                         int max_recv;
 496                 } negprot;
 497
 498                 struct {
 499                         bool done_sesssetup;
 500                         /*
 501                          * Size of data we can send to client. Set
 502                          *  by the client for all protocols above CORE.
 503                          *  Set by us for CORE protocol.
 504                          */
 505                         int max_send;
 506                         uint16_t last_session_tag;
 507
 508                         /* users from session setup */
 509                         char *session_userlist;
 510                         /* workgroup from session setup. */
 511                         char *session_workgroup;
 512                         /*
 513                          * this holds info on user ids that are already
 514                          * validated for this VC
 515                          */
 516                         user_struct *validated_users;
 517                         uint16_t next_vuid;
 518                         int num_validated_vuids;
 519 #ifdef HAVE_NETGROUP
 520                         char *my_yp_domain;
 521 #endif
 522                 } sessions;
 523                 struct {
 524                         connection_struct *Connections;
 525                         /* number of open connections */
 526                         struct bitmap *bmap;
 527                         int num_open;
 528                 } tcons;
 529                 struct smb_signing_state *signing_state;
 530                 /* List to store partial SPNEGO auth fragments. */
 531                 struct pending_auth_data *pd_list;
 532
 533                 struct notify_mid_map *notify_mid_maps;
 534
 535                 struct {
 536                         struct bitmap *dptr_bmap;
 537                         struct dptr_struct *dirptrs;
 538                         int dirhandles_open;
 539                 } searches;
 540                 struct {
 541                         /* dlink list we store pending lock records on. */
 542                         struct blocking_lock_record *blocking_lock_queue;
 543                         /* dlink list we move cancelled lock records onto. */
 544                         struct blocking_lock_record *blocking_lock_cancelled_queue;
 545
 546                         /* The event that makes us process our blocking lock queue */
 547                         struct timed_event *brl_timeout;
 548
 549                         bool blocking_lock_unlock_state;
 550                         bool blocking_lock_cancel_state;
 551                 } locks;
 552         } smb1;
 553         struct {
 554                 struct tevent_context *event_ctx;
 555                 struct tevent_queue *recv_queue;
 556                 struct tevent_queue *send_queue;
 557                 struct tstream_context *stream;
 558                 struct {
 559                         /* an id tree used to allocate vuids */
 560                         /* this holds info on session vuids that are already
 561                          * validated for this VC */
 562                         struct idr_context *idtree;
 563
 564                         /* this is the limit of vuid values for this connection */
 565                         uint64_t limit;
 566
 567                         struct smbd_smb2_session *list;
 568                 } sessions;
 569                 struct {
 570                         /* The event that makes us process our blocking lock queue */
 571                         struct timed_event *brl_timeout;
 572                         bool blocking_lock_unlock_state;
 573                 } locks;
 574                 struct smbd_smb2_request *requests;
 575         } smb2;
 576 };
 577
 578 extern struct smbd_server_connection *smbd_server_conn;
 579
 580 void smbd_init_globals(void);