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 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 extern struct msg_state *smbd_msg_state;
  62
  63 extern bool logged_ioctl_message;
  64
  65 extern int trans_num;
  66
  67 extern time_t last_smb_conf_reload_time;
  68 extern time_t last_printer_reload_time;
  69 extern pid_t background_lpq_updater_pid;
  70
  71 /****************************************************************************
  72  structure to hold a linked list of queued messages.
  73  for processing.
  74 ****************************************************************************/
  75 extern uint32_t common_flags2;
  76
  77 extern struct smb_trans_enc_state *partial_srv_trans_enc_ctx;
  78 extern struct smb_trans_enc_state *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 smbd_do_locking(struct smb_request *req,
 136                          files_struct *fsp,
 137                          uint8_t type,
 138                          int32_t timeout,
 139                          uint16_t num_ulocks,
 140                          struct smbd_lock_element *ulocks,
 141                          uint16_t num_locks,
 142                          struct smbd_lock_element *locks,
 143                          bool *async);
 144
 145 NTSTATUS smbd_do_qfilepathinfo(connection_struct *conn,
 146                                TALLOC_CTX *mem_ctx,
 147                                uint16_t info_level,
 148                                files_struct *fsp,
 149                                struct smb_filename *smb_fname,
 150                                bool delete_pending,
 151                                struct timespec write_time_ts,
 152                                struct ea_list *ea_list,
 153                                int lock_data_count,
 154                                char *lock_data,
 155                                uint16_t flags2,
 156                                unsigned int max_data_bytes,
 157                                char **ppdata,
 158                                unsigned int *pdata_size);
 159
 160 NTSTATUS smbd_do_setfilepathinfo(connection_struct *conn,
 161                                 struct smb_request *req,
 162                                 TALLOC_CTX *mem_ctx,
 163                                 uint16_t info_level,
 164                                 files_struct *fsp,
 165                                 struct smb_filename *smb_fname,
 166                                 char **ppdata, int total_data,
 167                                 int *ret_data_size);
 168
 169 NTSTATUS smbd_do_qfsinfo(connection_struct *conn,
 170                          TALLOC_CTX *mem_ctx,
 171                          uint16_t info_level,
 172                          uint16_t flags2,
 173                          unsigned int max_data_bytes,
 174                          char **ppdata,
 175                          int *ret_data_len);
 176
 177 bool smbd_dirptr_get_entry(TALLOC_CTX *ctx,
 178                            struct dptr_struct *dirptr,
 179                            const char *mask,
 180                            uint32_t dirtype,
 181                            bool dont_descend,
 182                            bool ask_sharemode,
 183                            bool (*match_fn)(TALLOC_CTX *ctx,
 184                                             void *private_data,
 185                                             const char *dname,
 186                                             const char *mask,
 187                                             char **_fname),
 188                            bool (*mode_fn)(TALLOC_CTX *ctx,
 189                                            void *private_data,
 190                                            struct smb_filename *smb_fname,
 191                                            uint32_t *_mode),
 192                            void *private_data,
 193                            char **_fname,
 194                            struct smb_filename **_smb_fname,
 195                            uint32_t *_mode,
 196                            long *_prev_offset);
 197
 198 bool smbd_dirptr_lanman2_entry(TALLOC_CTX *ctx,
 199                                connection_struct *conn,
 200                                struct dptr_struct *dirptr,
 201                                uint16 flags2,
 202                                const char *path_mask,
 203                                uint32 dirtype,
 204                                int info_level,
 205                                int requires_resume_key,
 206                                bool dont_descend,
 207                                bool ask_sharemode,
 208                                uint8_t align,
 209                                bool do_pad,
 210                                char **ppdata,
 211                                char *base_data,
 212                                char *end_data,
 213                                int space_remaining,
 214                                bool *out_of_space,
 215                                bool *got_exact_match,
 216                                int *_last_entry_off,
 217                                struct ea_list *name_list);
 218
 219 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
 220                                     const struct smb_filename *smb_fname,
 221                                     bool file_existed,
 222                                     uint32_t access_mask,
 223                                     uint32_t *access_mask_out);
 224 NTSTATUS smbd_check_open_rights(struct connection_struct *conn,
 225                                 const struct smb_filename *smb_fname,
 226                                 uint32_t access_mask,
 227                                 uint32_t *access_granted);
 228
 229 void smbd_notify_cancel_by_smbreq(const struct smb_request *smbreq);
 230
 231 void smbd_server_connection_terminate_ex(struct smbd_server_connection *sconn,
 232                                          const char *reason,
 233                                          const char *location);
 234 #define smbd_server_connection_terminate(sconn, reason) \
 235         smbd_server_connection_terminate_ex(sconn, reason, __location__)
 236
 237 struct server_id sconn_server_id(const struct smbd_server_connection *sconn);
 238
 239 const char *smb2_opcode_name(uint16_t opcode);
 240 bool smbd_is_smb2_header(const uint8_t *inbuf, size_t size);
 241
 242 void reply_smb2002(struct smb_request *req, uint16_t choice);
 243 void reply_smb20ff(struct smb_request *req, uint16_t choice);
 244 void smbd_smb2_first_negprot(struct smbd_server_connection *sconn,
 245                              const uint8_t *inbuf, size_t size);
 246
 247 NTSTATUS smbd_smb2_request_error_ex(struct smbd_smb2_request *req,
 248                                     NTSTATUS status,
 249                                     DATA_BLOB *info,
 250                                     const char *location);
 251 #define smbd_smb2_request_error(req, status) \
 252         smbd_smb2_request_error_ex(req, status, NULL, __location__)
 253 NTSTATUS smbd_smb2_request_done_ex(struct smbd_smb2_request *req,
 254                                    NTSTATUS status,
 255                                    DATA_BLOB body, DATA_BLOB *dyn,
 256                                    const char *location);
 257 #define smbd_smb2_request_done(req, body, dyn) \
 258         smbd_smb2_request_done_ex(req, NT_STATUS_OK, body, dyn, __location__)
 259
 260 NTSTATUS smbd_smb2_send_oplock_break(struct smbd_server_connection *sconn,
 261                                      uint64_t file_id_persistent,
 262                                      uint64_t file_id_volatile,
 263                                      uint8_t oplock_level);
 264
 265 NTSTATUS smbd_smb2_request_pending_queue(struct smbd_smb2_request *req,
 266                                          struct tevent_req *subreq);
 267
 268 struct smb_request *smbd_smb2_fake_smb_request(struct smbd_smb2_request *req);
 269 void remove_smb2_chained_fsp(files_struct *fsp);
 270
 271 NTSTATUS smbd_smb2_request_verify_sizes(struct smbd_smb2_request *req,
 272                                         size_t expected_body_size);
 273
 274 NTSTATUS smbd_smb2_request_process_negprot(struct smbd_smb2_request *req);
 275 NTSTATUS smbd_smb2_request_process_sesssetup(struct smbd_smb2_request *req);
 276 NTSTATUS smbd_smb2_request_process_logoff(struct smbd_smb2_request *req);
 277 NTSTATUS smbd_smb2_request_process_tcon(struct smbd_smb2_request *req);
 278 NTSTATUS smbd_smb2_request_process_tdis(struct smbd_smb2_request *req);
 279 NTSTATUS smbd_smb2_request_process_create(struct smbd_smb2_request *req);
 280 NTSTATUS smbd_smb2_request_process_close(struct smbd_smb2_request *req);
 281 NTSTATUS smbd_smb2_request_process_flush(struct smbd_smb2_request *req);
 282 NTSTATUS smbd_smb2_request_process_read(struct smbd_smb2_request *req);
 283 NTSTATUS smb2_read_complete(struct tevent_req *req, ssize_t nread, int err);
 284 NTSTATUS smbd_smb2_request_process_write(struct smbd_smb2_request *req);
 285 NTSTATUS smb2_write_complete(struct tevent_req *req, ssize_t nwritten, int err);
 286 NTSTATUS smbd_smb2_request_process_lock(struct smbd_smb2_request *req);
 287 NTSTATUS smbd_smb2_request_process_ioctl(struct smbd_smb2_request *req);
 288 NTSTATUS smbd_smb2_request_process_keepalive(struct smbd_smb2_request *req);
 289 NTSTATUS smbd_smb2_request_process_find(struct smbd_smb2_request *req);
 290 NTSTATUS smbd_smb2_request_process_notify(struct smbd_smb2_request *req);
 291 NTSTATUS smbd_smb2_request_process_getinfo(struct smbd_smb2_request *req);
 292 NTSTATUS smbd_smb2_request_process_setinfo(struct smbd_smb2_request *req);
 293 NTSTATUS smbd_smb2_request_process_break(struct smbd_smb2_request *req);
 294 NTSTATUS smbd_smb2_request_dispatch(struct smbd_smb2_request *req);
 295 void smbd_smb2_request_dispatch_immediate(struct tevent_context *ctx,
 296                                 struct tevent_immediate *im,
 297                                 void *private_data);
 298
 299 /* SMB1 -> SMB2 glue. */
 300 void send_break_message_smb2(files_struct *fsp, int level);
 301 struct blocking_lock_record *get_pending_smb2req_blr(struct smbd_smb2_request *smb2req);
 302 bool push_blocking_lock_request_smb2( struct byte_range_lock *br_lck,
 303                                 struct smb_request *req,
 304                                 files_struct *fsp,
 305                                 int lock_timeout,
 306                                 int lock_num,
 307                                 uint64_t smblctx,
 308                                 enum brl_type lock_type,
 309                                 enum brl_flavour lock_flav,
 310                                 uint64_t offset,
 311                                 uint64_t count,
 312                                 uint64_t blocking_smblctx);
 313 void process_blocking_lock_queue_smb2(
 314         struct smbd_server_connection *sconn, struct timeval tv_curr);
 315 void cancel_pending_lock_requests_by_fid_smb2(files_struct *fsp,
 316                         struct byte_range_lock *br_lck,
 317                         enum file_close_type close_type);
 318 /* From smbd/smb2_create.c */
 319 int map_smb2_oplock_levels_to_samba(uint8_t in_oplock_level);
 320 bool get_deferred_open_message_state_smb2(struct smbd_smb2_request *smb2req,
 321                         struct timeval *p_request_time,
 322                         void **pp_state);
 323 bool open_was_deferred_smb2(struct smbd_server_connection *sconn,
 324                             uint64_t mid);
 325 void remove_deferred_open_message_smb2(
 326         struct smbd_server_connection *sconn, uint64_t mid);
 327 void schedule_deferred_open_message_smb2(
 328         struct smbd_server_connection *sconn, uint64_t mid);
 329 bool push_deferred_open_message_smb2(struct smbd_smb2_request *smb2req,
 330                         struct timeval request_time,
 331                         struct timeval timeout,
 332                         struct file_id id,
 333                         char *private_data,
 334                         size_t priv_len);
 335
 336 struct smbd_smb2_request {
 337         struct smbd_smb2_request *prev, *next;
 338
 339         TALLOC_CTX *mem_pool;
 340         struct smbd_smb2_request **parent;
 341
 342         struct smbd_server_connection *sconn;
 343
 344         /* the session the request operates on, maybe NULL */
 345         struct smbd_smb2_session *session;
 346
 347         /* the tcon the request operates on, maybe NULL */
 348         struct smbd_smb2_tcon *tcon;
 349
 350         int current_idx;
 351         bool do_signing;
 352         bool async;
 353         bool cancelled;
 354         bool compound_related;
 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_session_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_message_list;
 448 struct pending_auth_data;
 449
 450 struct smbd_server_connection {
 451         int sock;
 452         const struct tsocket_address *local_address;
 453         const struct tsocket_address *remote_address;
 454         const char *remote_hostname;
 455         struct messaging_context *msg_ctx;
 456         struct {
 457                 bool got_session;
 458         } nbt;
 459         bool using_smb2;
 460         int trans_num;
 461
 462         /*
 463          * Cache for calling poll(2) to avoid allocations in our
 464          * central event loop
 465          */
 466         struct pollfd *pfds;
 467
 468         struct files_struct *files;
 469         struct bitmap *file_bmap;
 470         int real_max_open_files;
 471         int files_used;
 472         struct fsp_singleton_cache fsp_fi_cache;
 473         unsigned long file_gen_counter;
 474         int first_file;
 475
 476         /* Try GENSEC hook */
 477         bool use_gensec_hook;
 478
 479         /* number of open connections (tcons) */
 480         int num_tcons_open;
 481
 482         struct pending_message_list *deferred_open_queue;
 483
 484
 485         /* open directory handles. */
 486         struct {
 487                 struct bitmap *dptr_bmap;
 488                 struct dptr_struct *dirptrs;
 489                 int dirhandles_open;
 490         } searches;
 491
 492         uint64_t num_requests;
 493
 494         struct {
 495                 struct fd_event *fde;
 496
 497                 struct {
 498                         /*
 499                          * fd for the fcntl lock mutexing access to our sock
 500                          */
 501                         int socket_lock_fd;
 502
 503                         /*
 504                          * fd for the trusted pipe from
 505                          * echo handler child
 506                          */
 507                         int trusted_fd;
 508
 509                         /*
 510                          * fde for the trusted_fd
 511                          */
 512                         struct fd_event *trusted_fde;
 513
 514                         /*
 515                          * Reference count for the fcntl lock to
 516                          * allow recursive locks.
 517                          */
 518                         int ref_count;
 519                 } echo_handler;
 520
 521                 struct {
 522                         bool encrypted_passwords;
 523                         bool spnego;
 524                         struct auth_context *auth_context;
 525                         bool done;
 526                         /*
 527                          * Size of the data we can receive. Set by us.
 528                          * Can be modified by the max xmit parameter.
 529                          */
 530                         int max_recv;
 531                 } negprot;
 532
 533                 struct {
 534                         uint16_t client_major;
 535                         uint16_t client_minor;
 536                         uint32_t client_cap_low;
 537                         uint32_t client_cap_high;
 538                 } unix_info;
 539
 540                 struct {
 541                         bool done_sesssetup;
 542                         /*
 543                          * Size of data we can send to client. Set
 544                          *  by the client for all protocols above CORE.
 545                          *  Set by us for CORE protocol.
 546                          */
 547                         int max_send;
 548                         uint16_t last_session_tag;
 549
 550                         /* users from session setup */
 551                         char *session_userlist;
 552                         /* workgroup from session setup. */
 553                         char *session_workgroup;
 554                         /*
 555                          * this holds info on user ids that are already
 556                          * validated for this VC
 557                          */
 558                         user_struct *validated_users;
 559                         uint16_t next_vuid;
 560                         int num_validated_vuids;
 561                 } sessions;
 562                 struct {
 563                         connection_struct *Connections;
 564                         /* number of open connections */
 565                         struct bitmap *bmap;
 566                 } tcons;
 567                 struct smb_signing_state *signing_state;
 568                 /* List to store partial SPNEGO auth fragments. */
 569                 struct pending_auth_data *pd_list;
 570
 571                 struct notify_mid_map *notify_mid_maps;
 572
 573                 struct {
 574                         /* dlink list we store pending lock records on. */
 575                         struct blocking_lock_record *blocking_lock_queue;
 576                         /* dlink list we move cancelled lock records onto. */
 577                         struct blocking_lock_record *blocking_lock_cancelled_queue;
 578
 579                         /* The event that makes us process our blocking lock queue */
 580                         struct timed_event *brl_timeout;
 581
 582                         bool blocking_lock_unlock_state;
 583                         bool blocking_lock_cancel_state;
 584                 } locks;
 585         } smb1;
 586         struct {
 587                 struct tevent_context *event_ctx;
 588                 struct tevent_queue *recv_queue;
 589                 struct tevent_queue *send_queue;
 590                 struct tstream_context *stream;
 591                 bool negprot_2ff;
 592                 struct {
 593                         /* an id tree used to allocate vuids */
 594                         /* this holds info on session vuids that are already
 595                          * validated for this VC */
 596                         struct idr_context *idtree;
 597
 598                         /* this is the limit of vuid values for this connection */
 599                         uint64_t limit;
 600
 601                         struct smbd_smb2_session *list;
 602                 } sessions;
 603                 struct {
 604                         /* The event that makes us process our blocking lock queue */
 605                         struct timed_event *brl_timeout;
 606                         bool blocking_lock_unlock_state;
 607                 } locks;
 608                 struct smbd_smb2_request *requests;
 609                 uint64_t seqnum_low;
 610                 uint32_t credits_granted;
 611                 uint32_t max_credits;
 612                 uint32_t max_trans;
 613                 uint32_t max_read;
 614                 uint32_t max_write;
 615                 struct bitmap *credits_bitmap;
 616                 bool compound_related_in_progress;
 617         } smb2;
 618 };
 619
 620 extern struct smbd_server_connection *smbd_server_conn;
 621
 622 struct smbd_server_connection *msg_ctx_to_sconn(struct messaging_context *msg_ctx);
 623
 624 void smbd_init_globals(void);