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(HAVE_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 struct tdb_context;
  51 extern struct tdb_context *tdb_mangled_cache;
  52
  53 /*
  54   this determines how many characters are used from the original filename
  55   in the 8.3 mangled name. A larger value leads to a weaker hash and more collisions.
  56   The largest possible value is 6.
  57 */
  58 extern unsigned mangle_prefix;
  59
  60 struct 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 extern pid_t background_lpq_updater_pid;
  69
  70 /****************************************************************************
  71  structure to hold a linked list of queued messages.
  72  for processing.
  73 ****************************************************************************/
  74 extern uint32_t common_flags2;
  75
  76 extern struct smb_trans_enc_state *partial_srv_trans_enc_ctx;
  77 extern struct smb_trans_enc_state *srv_trans_enc_ctx;
  78
  79 struct sec_ctx {
  80         struct security_unix_token ut;
  81         struct security_token *token;
  82 };
  83 /* A stack of security contexts.  We include the current context as being
  84    the first one, so there is room for another MAX_SEC_CTX_DEPTH more. */
  85 extern struct sec_ctx sec_ctx_stack[MAX_SEC_CTX_DEPTH + 1];
  86 extern int sec_ctx_stack_ndx;
  87 extern bool become_uid_done;
  88 extern bool become_gid_done;
  89
  90 extern connection_struct *last_conn;
  91 extern uint16_t last_flags;
  92
  93 extern uint32_t global_client_caps;
  94
  95 extern uint16_t fnf_handle;
  96
  97 struct conn_ctx {
  98         connection_struct *conn;
  99         uint16 vuid;
 100 };
 101 /* A stack of current_user connection contexts. */
 102 extern struct conn_ctx conn_ctx_stack[MAX_SEC_CTX_DEPTH];
 103 extern int conn_ctx_stack_ndx;
 104
 105 struct vfs_init_function_entry;
 106 extern struct vfs_init_function_entry *backends;
 107 extern char *sparse_buf;
 108 extern char *LastDir;
 109
 110 struct smbd_parent_context;
 111 extern struct smbd_parent_context *am_parent;
 112 extern struct memcache *smbd_memcache_ctx;
 113 extern bool exit_firsttime;
 114
 115 struct tstream_context;
 116 struct smbd_smb2_request;
 117 struct smbd_smb2_session;
 118 struct smbd_smb2_tcon;
 119
 120 DATA_BLOB negprot_spnego(TALLOC_CTX *ctx, struct smbd_server_connection *sconn);
 121
 122 void smbd_lock_socket(struct smbd_server_connection *sconn);
 123 void smbd_unlock_socket(struct smbd_server_connection *sconn);
 124
 125 NTSTATUS smbd_do_locking(struct smb_request *req,
 126                          files_struct *fsp,
 127                          uint8_t type,
 128                          int32_t timeout,
 129                          uint16_t num_ulocks,
 130                          struct smbd_lock_element *ulocks,
 131                          uint16_t num_locks,
 132                          struct smbd_lock_element *locks,
 133                          bool *async);
 134
 135 NTSTATUS smbd_do_qfilepathinfo(connection_struct *conn,
 136                                TALLOC_CTX *mem_ctx,
 137                                uint16_t info_level,
 138                                files_struct *fsp,
 139                                struct smb_filename *smb_fname,
 140                                bool delete_pending,
 141                                struct timespec write_time_ts,
 142                                struct ea_list *ea_list,
 143                                int lock_data_count,
 144                                char *lock_data,
 145                                uint16_t flags2,
 146                                unsigned int max_data_bytes,
 147                                char **ppdata,
 148                                unsigned int *pdata_size);
 149
 150 NTSTATUS smbd_do_setfilepathinfo(connection_struct *conn,
 151                                 struct smb_request *req,
 152                                 TALLOC_CTX *mem_ctx,
 153                                 uint16_t info_level,
 154                                 files_struct *fsp,
 155                                 struct smb_filename *smb_fname,
 156                                 char **ppdata, int total_data,
 157                                 int *ret_data_size);
 158
 159 NTSTATUS smbd_do_qfsinfo(connection_struct *conn,
 160                          TALLOC_CTX *mem_ctx,
 161                          uint16_t info_level,
 162                          uint16_t flags2,
 163                          unsigned int max_data_bytes,
 164                          char **ppdata,
 165                          int *ret_data_len);
 166
 167 bool smbd_dirptr_get_entry(TALLOC_CTX *ctx,
 168                            struct dptr_struct *dirptr,
 169                            const char *mask,
 170                            uint32_t dirtype,
 171                            bool dont_descend,
 172                            bool ask_sharemode,
 173                            bool (*match_fn)(TALLOC_CTX *ctx,
 174                                             void *private_data,
 175                                             const char *dname,
 176                                             const char *mask,
 177                                             char **_fname),
 178                            bool (*mode_fn)(TALLOC_CTX *ctx,
 179                                            void *private_data,
 180                                            struct smb_filename *smb_fname,
 181                                            uint32_t *_mode),
 182                            void *private_data,
 183                            char **_fname,
 184                            struct smb_filename **_smb_fname,
 185                            uint32_t *_mode,
 186                            long *_prev_offset);
 187
 188 bool smbd_dirptr_lanman2_entry(TALLOC_CTX *ctx,
 189                                connection_struct *conn,
 190                                struct dptr_struct *dirptr,
 191                                uint16 flags2,
 192                                const char *path_mask,
 193                                uint32 dirtype,
 194                                int info_level,
 195                                int requires_resume_key,
 196                                bool dont_descend,
 197                                bool ask_sharemode,
 198                                uint8_t align,
 199                                bool do_pad,
 200                                char **ppdata,
 201                                char *base_data,
 202                                char *end_data,
 203                                int space_remaining,
 204                                bool *out_of_space,
 205                                bool *got_exact_match,
 206                                int *_last_entry_off,
 207                                struct ea_list *name_list);
 208
 209 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
 210                                     const struct smb_filename *smb_fname,
 211                                     uint32_t access_mask,
 212                                     uint32_t *access_mask_out);
 213
 214 void smbd_notify_cancel_by_smbreq(const struct smb_request *smbreq);
 215
 216 void smbd_server_connection_terminate_ex(struct smbd_server_connection *sconn,
 217                                          const char *reason,
 218                                          const char *location);
 219 #define smbd_server_connection_terminate(sconn, reason) \
 220         smbd_server_connection_terminate_ex(sconn, reason, __location__)
 221
 222 const char *smb2_opcode_name(uint16_t opcode);
 223 bool smbd_is_smb2_header(const uint8_t *inbuf, size_t size);
 224
 225 void reply_smb2002(struct smb_request *req, uint16_t choice);
 226 void reply_smb20ff(struct smb_request *req, uint16_t choice);
 227 void smbd_smb2_first_negprot(struct smbd_server_connection *sconn,
 228                              const uint8_t *inbuf, size_t size);
 229
 230 NTSTATUS smbd_smb2_request_error_ex(struct smbd_smb2_request *req,
 231                                     NTSTATUS status,
 232                                     DATA_BLOB *info,
 233                                     const char *location);
 234 #define smbd_smb2_request_error(req, status) \
 235         smbd_smb2_request_error_ex(req, status, NULL, __location__)
 236 NTSTATUS smbd_smb2_request_done_ex(struct smbd_smb2_request *req,
 237                                    NTSTATUS status,
 238                                    DATA_BLOB body, DATA_BLOB *dyn,
 239                                    const char *location);
 240 #define smbd_smb2_request_done(req, body, dyn) \
 241         smbd_smb2_request_done_ex(req, NT_STATUS_OK, body, dyn, __location__)
 242
 243 NTSTATUS smbd_smb2_send_oplock_break(struct smbd_server_connection *sconn,
 244                                      uint64_t file_id_persistent,
 245                                      uint64_t file_id_volatile,
 246                                      uint8_t oplock_level);
 247
 248 NTSTATUS smbd_smb2_request_pending_queue(struct smbd_smb2_request *req,
 249                                          struct tevent_req *subreq,
 250                                          uint32_t defer_time);
 251
 252 struct smb_request *smbd_smb2_fake_smb_request(struct smbd_smb2_request *req);
 253 void remove_smb2_chained_fsp(files_struct *fsp);
 254
 255 NTSTATUS smbd_smb2_request_verify_creditcharge(struct smbd_smb2_request *req,
 256                                                uint32_t data_length);
 257
 258 NTSTATUS smbd_smb2_request_verify_sizes(struct smbd_smb2_request *req,
 259                                         size_t expected_body_size);
 260
 261 NTSTATUS smbd_smb2_request_process_negprot(struct smbd_smb2_request *req);
 262 NTSTATUS smbd_smb2_request_process_sesssetup(struct smbd_smb2_request *req);
 263 NTSTATUS smbd_smb2_request_process_logoff(struct smbd_smb2_request *req);
 264 NTSTATUS smbd_smb2_request_process_tcon(struct smbd_smb2_request *req);
 265 NTSTATUS smbd_smb2_request_process_tdis(struct smbd_smb2_request *req);
 266 NTSTATUS smbd_smb2_request_process_create(struct smbd_smb2_request *req);
 267 NTSTATUS smbd_smb2_request_process_close(struct smbd_smb2_request *req);
 268 NTSTATUS smbd_smb2_request_process_flush(struct smbd_smb2_request *req);
 269 NTSTATUS smbd_smb2_request_process_read(struct smbd_smb2_request *req);
 270 NTSTATUS smb2_read_complete(struct tevent_req *req, ssize_t nread, int err);
 271 NTSTATUS smbd_smb2_request_process_write(struct smbd_smb2_request *req);
 272 NTSTATUS smb2_write_complete(struct tevent_req *req, ssize_t nwritten, int err);
 273 NTSTATUS smbd_smb2_request_process_lock(struct smbd_smb2_request *req);
 274 NTSTATUS smbd_smb2_request_process_ioctl(struct smbd_smb2_request *req);
 275 NTSTATUS smbd_smb2_request_process_keepalive(struct smbd_smb2_request *req);
 276 NTSTATUS smbd_smb2_request_process_find(struct smbd_smb2_request *req);
 277 NTSTATUS smbd_smb2_request_process_notify(struct smbd_smb2_request *req);
 278 NTSTATUS smbd_smb2_request_process_getinfo(struct smbd_smb2_request *req);
 279 NTSTATUS smbd_smb2_request_process_setinfo(struct smbd_smb2_request *req);
 280 NTSTATUS smbd_smb2_request_process_break(struct smbd_smb2_request *req);
 281 NTSTATUS smbd_smb2_request_dispatch(struct smbd_smb2_request *req);
 282 void smbd_smb2_request_dispatch_immediate(struct tevent_context *ctx,
 283                                 struct tevent_immediate *im,
 284                                 void *private_data);
 285
 286 /* SMB1 -> SMB2 glue. */
 287 void send_break_message_smb2(files_struct *fsp, int level);
 288 struct blocking_lock_record *get_pending_smb2req_blr(struct smbd_smb2_request *smb2req);
 289 bool push_blocking_lock_request_smb2( struct byte_range_lock *br_lck,
 290                                 struct smb_request *req,
 291                                 files_struct *fsp,
 292                                 int lock_timeout,
 293                                 int lock_num,
 294                                 uint64_t smblctx,
 295                                 enum brl_type lock_type,
 296                                 enum brl_flavour lock_flav,
 297                                 uint64_t offset,
 298                                 uint64_t count,
 299                                 uint64_t blocking_smblctx);
 300 void process_blocking_lock_queue_smb2(
 301         struct smbd_server_connection *sconn, struct timeval tv_curr);
 302 void cancel_pending_lock_requests_by_fid_smb2(files_struct *fsp,
 303                         struct byte_range_lock *br_lck,
 304                         enum file_close_type close_type);
 305 /* From smbd/smb2_create.c */
 306 int map_smb2_oplock_levels_to_samba(uint8_t in_oplock_level);
 307 bool get_deferred_open_message_state_smb2(struct smbd_smb2_request *smb2req,
 308                         struct timeval *p_request_time,
 309                         void **pp_state);
 310 bool open_was_deferred_smb2(struct smbd_server_connection *sconn,
 311                             uint64_t mid);
 312 void remove_deferred_open_message_smb2(
 313         struct smbd_server_connection *sconn, uint64_t mid);
 314 void schedule_deferred_open_message_smb2(
 315         struct smbd_server_connection *sconn, uint64_t mid);
 316 bool push_deferred_open_message_smb2(struct smbd_smb2_request *smb2req,
 317                         struct timeval request_time,
 318                         struct timeval timeout,
 319                         struct file_id id,
 320                         char *private_data,
 321                         size_t priv_len);
 322
 323 struct smbXsrv_connection {
 324         struct smbd_server_connection *sconn;
 325
 326         const struct tsocket_address *local_address;
 327         const struct tsocket_address *remote_address;
 328         const char *remote_hostname;
 329
 330         struct tevent_context *ev_ctx;
 331         struct messaging_context *msg_ctx;
 332
 333         enum protocol_types protocol;
 334
 335         struct {
 336                 struct {
 337                         uint32_t capabilities;
 338                         struct GUID guid;
 339                         uint16_t security_mode;
 340                         uint16_t num_dialects;
 341                         uint16_t *dialects;
 342                 } client;
 343                 struct {
 344                         uint32_t capabilities;
 345                         struct GUID guid;
 346                         uint16_t security_mode;
 347                         uint16_t dialect;
 348                         uint32_t max_trans;
 349                         uint32_t max_read;
 350                         uint32_t max_write;
 351                 } server;
 352         } smb2;
 353
 354         struct msg_state *msg_state;
 355 };
 356
 357 NTSTATUS smbXsrv_connection_init_tables(struct smbXsrv_connection *conn,
 358                                         enum protocol_types protocol);
 359
 360 struct smbd_smb2_request {
 361         struct smbd_smb2_request *prev, *next;
 362
 363         TALLOC_CTX *mem_pool;
 364         struct smbd_smb2_request **parent;
 365
 366         struct smbd_server_connection *sconn;
 367
 368         /* the session the request operates on, maybe NULL */
 369         struct smbd_smb2_session *session;
 370         uint64_t last_session_id;
 371
 372         /* the tcon the request operates on, maybe NULL */
 373         struct smbd_smb2_tcon *tcon;
 374         uint32_t last_tid;
 375
 376         int current_idx;
 377         bool do_signing;
 378         struct tevent_timer *async_te;
 379         bool cancelled;
 380         bool compound_related;
 381
 382         /* fake smb1 request. */
 383         struct smb_request *smb1req;
 384         struct files_struct *compat_chain_fsp;
 385
 386         NTSTATUS next_status;
 387
 388         /*
 389          * The sub request for async backend calls.
 390          * This is used for SMB2 Cancel.
 391          */
 392         struct tevent_req *subreq;
 393
 394         struct {
 395                 /* the NBT header is not allocated */
 396                 uint8_t nbt_hdr[4];
 397                 /*
 398                  * vector[0] NBT
 399                  * .
 400                  * vector[1] SMB2
 401                  * vector[2] fixed body
 402                  * vector[3] dynamic body
 403                  * .
 404                  * .
 405                  * .
 406                  * vector[4] SMB2
 407                  * vector[5] fixed body
 408                  * vector[6] dynamic body
 409                  * .
 410                  * .
 411                  * .
 412                  */
 413                 struct iovec *vector;
 414                 int vector_count;
 415         } in;
 416         struct {
 417                 /* the NBT header is not allocated */
 418                 uint8_t nbt_hdr[4];
 419                 /*
 420                  * vector[0] NBT
 421                  * .
 422                  * vector[1] SMB2
 423                  * vector[2] fixed body
 424                  * vector[3] dynamic body
 425                  * .
 426                  * .
 427                  * .
 428                  * vector[4] SMB2
 429                  * vector[5] fixed body
 430                  * vector[6] dynamic body
 431                  * .
 432                  * .
 433                  * .
 434                  */
 435                 struct iovec *vector;
 436                 int vector_count;
 437         } out;
 438 };
 439
 440 struct smbd_server_connection;
 441
 442 struct smbd_smb2_session {
 443         struct smbd_smb2_session *prev, *next;
 444         struct smbd_server_connection *sconn;
 445         NTSTATUS status;
 446         uint64_t vuid;
 447         struct gensec_security *gensec_security;
 448         struct auth_session_info *session_info;
 449         DATA_BLOB session_key;
 450         bool do_signing;
 451
 452         struct user_struct *compat_vuser;
 453
 454         struct {
 455                 /* an id tree used to allocate tids */
 456                 struct idr_context *idtree;
 457
 458                 /* this is the limit of tid values for this connection */
 459                 uint32_t limit;
 460
 461                 struct smbd_smb2_tcon *list;
 462         } tcons;
 463 };
 464
 465 struct smbd_smb2_tcon {
 466         struct smbd_smb2_tcon *prev, *next;
 467         struct smbd_smb2_session *session;
 468         uint32_t tid;
 469         int snum;
 470         connection_struct *compat_conn;
 471 };
 472
 473 struct pending_message_list;
 474 struct pending_auth_data;
 475
 476 struct smbd_server_connection {
 477         int sock;
 478         const struct tsocket_address *local_address;
 479         const struct tsocket_address *remote_address;
 480         const char *remote_hostname;
 481         struct tevent_context *ev_ctx;
 482         struct messaging_context *msg_ctx;
 483         struct sys_notify_context *sys_notify_ctx;
 484         struct notify_context *notify_ctx;
 485         struct {
 486                 bool got_session;
 487         } nbt;
 488         bool using_smb2;
 489         int trans_num;
 490
 491         size_t num_users;
 492         struct user_struct *users;
 493
 494         size_t num_connections;
 495         struct connection_struct *connections;
 496
 497         size_t num_files;
 498         struct files_struct *files;
 499
 500         struct bitmap *file_bmap;
 501         int real_max_open_files;
 502         struct fsp_singleton_cache fsp_fi_cache;
 503         unsigned long file_gen_counter;
 504         int first_file;
 505
 506         struct pending_message_list *deferred_open_queue;
 507
 508
 509         /* open directory handles. */
 510         struct {
 511                 struct bitmap *dptr_bmap;
 512                 struct dptr_struct *dirptrs;
 513                 int dirhandles_open;
 514         } searches;
 515
 516         uint64_t num_requests;
 517
 518         /* Current number of oplocks we have outstanding. */
 519         struct {
 520                 int32_t exclusive_open;
 521                 int32_t level_II_open;
 522                 struct kernel_oplocks *kernel_ops;
 523         } oplocks;
 524
 525         struct {
 526                 struct fd_event *fde;
 527
 528                 struct {
 529                         /*
 530                          * fd for the fcntl lock mutexing access to our sock
 531                          */
 532                         int socket_lock_fd;
 533
 534                         /*
 535                          * fd for the trusted pipe from
 536                          * echo handler child
 537                          */
 538                         int trusted_fd;
 539
 540                         /*
 541                          * fde for the trusted_fd
 542                          */
 543                         struct fd_event *trusted_fde;
 544
 545                         /*
 546                          * Reference count for the fcntl lock to
 547                          * allow recursive locks.
 548                          */
 549                         int ref_count;
 550                 } echo_handler;
 551
 552                 struct {
 553                         bool encrypted_passwords;
 554                         bool spnego;
 555                         struct auth4_context *auth_context;
 556                         bool done;
 557                         /*
 558                          * Size of the data we can receive. Set by us.
 559                          * Can be modified by the max xmit parameter.
 560                          */
 561                         int max_recv;
 562                 } negprot;
 563
 564                 struct {
 565                         uint16_t client_major;
 566                         uint16_t client_minor;
 567                         uint32_t client_cap_low;
 568                         uint32_t client_cap_high;
 569                 } unix_info;
 570
 571                 struct {
 572                         bool done_sesssetup;
 573                         /*
 574                          * Size of data we can send to client. Set
 575                          *  by the client for all protocols above CORE.
 576                          *  Set by us for CORE protocol.
 577                          */
 578                         int max_send;
 579                         uint16_t last_session_tag;
 580
 581                         /*
 582                          * this holds info on user ids that are already
 583                          * validated for this VC
 584                          */
 585                         uint16_t next_vuid;
 586                 } sessions;
 587                 struct {
 588                         /* number of open connections */
 589                         struct bitmap *bmap;
 590                 } tcons;
 591                 struct smb_signing_state *signing_state;
 592
 593                 struct notify_mid_map *notify_mid_maps;
 594
 595                 struct {
 596                         /* dlink list we store pending lock records on. */
 597                         struct blocking_lock_record *blocking_lock_queue;
 598                         /* dlink list we move cancelled lock records onto. */
 599                         struct blocking_lock_record *blocking_lock_cancelled_queue;
 600
 601                         /* The event that makes us process our blocking lock queue */
 602                         struct timed_event *brl_timeout;
 603
 604                         bool blocking_lock_unlock_state;
 605                         bool blocking_lock_cancel_state;
 606                 } locks;
 607         } smb1;
 608         struct {
 609                 struct tevent_queue *recv_queue;
 610                 struct tevent_queue *send_queue;
 611                 struct tstream_context *stream;
 612                 bool negprot_2ff;
 613                 struct {
 614                         /* an id tree used to allocate vuids */
 615                         /* this holds info on session vuids that are already
 616                          * validated for this VC */
 617                         struct idr_context *idtree;
 618
 619                         /* this is the limit of vuid values for this connection */
 620                         uint64_t limit;
 621
 622                         struct smbd_smb2_session *list;
 623                 } sessions;
 624                 struct {
 625                         /* The event that makes us process our blocking lock queue */
 626                         struct timed_event *brl_timeout;
 627                         bool blocking_lock_unlock_state;
 628                 } locks;
 629                 struct smbd_smb2_request *requests;
 630                 uint64_t seqnum_low;
 631                 uint32_t credits_granted;
 632                 uint32_t max_credits;
 633                 uint32_t max_trans;
 634                 uint32_t max_read;
 635                 uint32_t max_write;
 636                 bool supports_multicredit;
 637                 struct bitmap *credits_bitmap;
 638                 bool compound_related_in_progress;
 639         } smb2;
 640
 641         struct smbXsrv_connection *conn;
 642 };
 643
 644 extern struct smbXsrv_connection *global_smbXsrv_connection;
 645
 646 void smbd_init_globals(void);