source3/smbd/globals.h

   1 /*
   2    Unix SMB/Netbios implementation.
   3    smbd globals
   4    Copyright (C) Stefan Metzmacher 2009
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #if defined(WITH_AIO)
  21 struct aio_extra;
  22 extern struct aio_extra *aio_list_head;
  23 extern struct tevent_signal *aio_signal_event;
  24 extern int aio_pending_size;
  25 extern int outstanding_aio_calls;
  26 #endif
  27
  28 /* dlink list we store pending lock records on. */
  29 extern struct blocking_lock_record *blocking_lock_queue;
  30
  31 /* dlink list we move cancelled lock records onto. */
  32 extern struct blocking_lock_record *blocking_lock_cancelled_queue;
  33
  34 /* The event that makes us process our blocking lock queue */
  35 extern struct timed_event *brl_timeout;
  36
  37 extern bool blocking_lock_unlock_state;
  38 extern bool blocking_lock_cancel_state;
  39
  40 #ifdef USE_DMAPI
  41 struct smbd_dmapi_context;
  42 extern struct smbd_dmapi_context *dmapi_ctx;
  43 #endif
  44
  45 extern bool dfree_broken;
  46
  47 /* how many write cache buffers have been allocated */
  48 extern unsigned int allocated_write_caches;
  49
  50 extern int real_max_open_files;
  51 extern struct bitmap *file_bmap;
  52 extern files_struct *Files;
  53 extern int files_used;
  54 /* A singleton cache to speed up searching by dev/inode. */
  55 struct fsp_singleton_cache {
  56         files_struct *fsp;
  57         struct file_id id;
  58 };
  59 extern struct fsp_singleton_cache fsp_fi_cache;
  60 extern unsigned long file_gen_counter;
  61 extern int first_file;
  62
  63 extern const struct mangle_fns *mangle_fns;
  64
  65 extern unsigned char *chartest;
  66 extern TDB_CONTEXT *tdb_mangled_cache;
  67
  68 /* these tables are used to provide fast tests for characters */
  69 extern unsigned char char_flags[256];
  70 /*
  71   this determines how many characters are used from the original filename
  72   in the 8.3 mangled name. A larger value leads to a weaker hash and more collisions.
  73   The largest possible value is 6.
  74 */
  75 extern unsigned mangle_prefix;
  76 extern unsigned char base_reverse[256];
  77
  78 extern char *last_from;
  79 extern char *last_to;
  80
  81 struct msg_state;
  82 extern struct msg_state *smbd_msg_state;
  83
  84 extern bool logged_ioctl_message;
  85
  86 extern int trans_num;
  87
  88 extern pid_t mypid;
  89 extern time_t last_smb_conf_reload_time;
  90 extern time_t last_printer_reload_time;
  91 /****************************************************************************
  92  structure to hold a linked list of queued messages.
  93  for processing.
  94 ****************************************************************************/
  95 struct pending_message_list;
  96 extern struct pending_message_list *deferred_open_queue;
  97 extern uint32_t common_flags2;
  98
  99 struct smb_srv_trans_enc_ctx;
 100 extern struct smb_srv_trans_enc_ctx *partial_srv_trans_enc_ctx;
 101 extern struct smb_srv_trans_enc_ctx *srv_trans_enc_ctx;
 102
 103 struct sec_ctx {
 104         UNIX_USER_TOKEN ut;
 105         NT_USER_TOKEN *token;
 106 };
 107 /* A stack of security contexts.  We include the current context as being
 108    the first one, so there is room for another MAX_SEC_CTX_DEPTH more. */
 109 extern struct sec_ctx sec_ctx_stack[MAX_SEC_CTX_DEPTH + 1];
 110 extern int sec_ctx_stack_ndx;
 111 extern bool become_uid_done;
 112 extern bool become_gid_done;
 113
 114 extern connection_struct *last_conn;
 115 extern uint16_t last_flags;
 116
 117 extern uint32_t global_client_caps;
 118
 119 extern uint16_t fnf_handle;
 120
 121 struct conn_ctx {
 122         connection_struct *conn;
 123         uint16 vuid;
 124 };
 125 /* A stack of current_user connection contexts. */
 126 extern struct conn_ctx conn_ctx_stack[MAX_SEC_CTX_DEPTH];
 127 extern int conn_ctx_stack_ndx;
 128
 129 struct vfs_init_function_entry;
 130 extern struct vfs_init_function_entry *backends;
 131 extern char *sparse_buf;
 132
 133 /* Current number of oplocks we have outstanding. */
 134 extern int32_t exclusive_oplocks_open;
 135 extern int32_t level_II_oplocks_open;
 136 extern bool global_client_failed_oplock_break;
 137 extern struct kernel_oplocks *koplocks;
 138
 139 extern int am_parent;
 140 extern int server_fd;
 141 extern struct event_context *smbd_event_ctx;
 142 extern struct messaging_context *smbd_msg_ctx;
 143 extern struct memcache *smbd_memcache_ctx;
 144 extern bool exit_firsttime;
 145 struct child_pid;
 146 extern struct child_pid *children;
 147 extern int num_children;
 148
 149 struct tstream_context;
 150 struct smbd_smb2_request;
 151 struct smbd_smb2_session;
 152 struct smbd_smb2_tcon;
 153
 154 DATA_BLOB negprot_spnego(void);
 155
 156 void smbd_lock_socket(struct smbd_server_connection *sconn);
 157 void smbd_unlock_socket(struct smbd_server_connection *sconn);
 158
 159 NTSTATUS smb2_signing_sign_pdu(DATA_BLOB session_key,
 160                                struct iovec *vector,
 161                                int count);
 162 NTSTATUS smb2_signing_check_pdu(DATA_BLOB session_key,
 163                                 const struct iovec *vector,
 164                                 int count);
 165
 166 struct smbd_lock_element {
 167         uint32_t smbpid;
 168         enum brl_type brltype;
 169         uint64_t offset;
 170         uint64_t count;
 171 };
 172
 173 NTSTATUS smbd_do_locking(struct smb_request *req,
 174                          files_struct *fsp,
 175                          uint8_t type,
 176                          int32_t timeout,
 177                          uint16_t num_ulocks,
 178                          struct smbd_lock_element *ulocks,
 179                          uint16_t num_locks,
 180                          struct smbd_lock_element *locks,
 181                          bool *async);
 182
 183 NTSTATUS smbd_do_qfilepathinfo(connection_struct *conn,
 184                                TALLOC_CTX *mem_ctx,
 185                                uint16_t info_level,
 186                                files_struct *fsp,
 187                                struct smb_filename *smb_fname,
 188                                bool delete_pending,
 189                                struct timespec write_time_ts,
 190                                struct ea_list *ea_list,
 191                                int lock_data_count,
 192                                char *lock_data,
 193                                uint16_t flags2,
 194                                unsigned int max_data_bytes,
 195                                char **ppdata,
 196                                unsigned int *pdata_size);
 197
 198 NTSTATUS smbd_do_setfilepathinfo(connection_struct *conn,
 199                                 struct smb_request *req,
 200                                 TALLOC_CTX *mem_ctx,
 201                                 uint16_t info_level,
 202                                 files_struct *fsp,
 203                                 struct smb_filename *smb_fname,
 204                                 char **ppdata, int total_data,
 205                                 int *ret_data_size);
 206
 207 NTSTATUS smbd_do_qfsinfo(connection_struct *conn,
 208                          TALLOC_CTX *mem_ctx,
 209                          uint16_t info_level,
 210                          uint16_t flags2,
 211                          unsigned int max_data_bytes,
 212                          char **ppdata,
 213                          int *ret_data_len);
 214
 215 bool smbd_dirptr_get_entry(TALLOC_CTX *ctx,
 216                            struct dptr_struct *dirptr,
 217                            const char *mask,
 218                            uint32_t dirtype,
 219                            bool dont_descend,
 220                            bool ask_sharemode,
 221                            bool (*match_fn)(TALLOC_CTX *ctx,
 222                                             void *private_data,
 223                                             const char *dname,
 224                                             const char *mask,
 225                                             char **_fname),
 226                            bool (*mode_fn)(TALLOC_CTX *ctx,
 227                                            void *private_data,
 228                                            struct smb_filename *smb_fname,
 229                                            uint32_t *_mode),
 230                            void *private_data,
 231                            char **_fname,
 232                            struct smb_filename **_smb_fname,
 233                            uint32_t *_mode,
 234                            long *_prev_offset);
 235
 236 bool smbd_dirptr_lanman2_entry(TALLOC_CTX *ctx,
 237                                connection_struct *conn,
 238                                struct dptr_struct *dirptr,
 239                                uint16 flags2,
 240                                const char *path_mask,
 241                                uint32 dirtype,
 242                                int info_level,
 243                                int requires_resume_key,
 244                                bool dont_descend,
 245                                bool ask_sharemode,
 246                                uint8_t align,
 247                                bool do_pad,
 248                                char **ppdata,
 249                                char *base_data,
 250                                char *end_data,
 251                                int space_remaining,
 252                                bool *out_of_space,
 253                                bool *got_exact_match,
 254                                int *_last_entry_off,
 255                                struct ea_list *name_list);
 256
 257 NTSTATUS smbd_check_open_rights(struct connection_struct *conn,
 258                                 const struct smb_filename *smb_fname,
 259                                 uint32_t access_mask,
 260                                 uint32_t *access_granted);
 261
 262 void smbd_notify_cancel_by_smbreq(struct smbd_server_connection *sconn,
 263                                   const struct smb_request *smbreq);
 264
 265 void smbd_server_connection_terminate_ex(struct smbd_server_connection *sconn,
 266                                          const char *reason,
 267                                          const char *location);
 268 #define smbd_server_connection_terminate(sconn, reason) \
 269         smbd_server_connection_terminate_ex(sconn, reason, __location__)
 270
 271 bool smbd_is_smb2_header(const uint8_t *inbuf, size_t size);
 272
 273 void reply_smb2002(struct smb_request *req, uint16_t choice);
 274 void smbd_smb2_first_negprot(struct smbd_server_connection *sconn,
 275                              const uint8_t *inbuf, size_t size);
 276
 277 NTSTATUS smbd_smb2_request_error_ex(struct smbd_smb2_request *req,
 278                                     NTSTATUS status,
 279                                     DATA_BLOB *info,
 280                                     const char *location);
 281 #define smbd_smb2_request_error(req, status) \
 282         smbd_smb2_request_error_ex(req, status, NULL, __location__)
 283 NTSTATUS smbd_smb2_request_done_ex(struct smbd_smb2_request *req,
 284                                    NTSTATUS status,
 285                                    DATA_BLOB body, DATA_BLOB *dyn,
 286                                    const char *location);
 287 #define smbd_smb2_request_done(req, body, dyn) \
 288         smbd_smb2_request_done_ex(req, NT_STATUS_OK, body, dyn, __location__)
 289
 290 NTSTATUS smbd_smb2_send_oplock_break(struct smbd_server_connection *sconn,
 291                                      uint64_t file_id_persistent,
 292                                      uint64_t file_id_volatile,
 293                                      uint8_t oplock_level);
 294
 295 NTSTATUS smbd_smb2_request_pending_queue(struct smbd_smb2_request *req,
 296                                          struct tevent_req *subreq);
 297
 298 NTSTATUS smbd_smb2_request_check_session(struct smbd_smb2_request *req);
 299 NTSTATUS smbd_smb2_request_check_tcon(struct smbd_smb2_request *req);
 300
 301 struct smb_request *smbd_smb2_fake_smb_request(struct smbd_smb2_request *req);
 302
 303 NTSTATUS smbd_smb2_request_process_negprot(struct smbd_smb2_request *req);
 304 NTSTATUS smbd_smb2_request_process_sesssetup(struct smbd_smb2_request *req);
 305 NTSTATUS smbd_smb2_request_process_logoff(struct smbd_smb2_request *req);
 306 NTSTATUS smbd_smb2_request_process_tcon(struct smbd_smb2_request *req);
 307 NTSTATUS smbd_smb2_request_process_tdis(struct smbd_smb2_request *req);
 308 NTSTATUS smbd_smb2_request_process_create(struct smbd_smb2_request *req);
 309 NTSTATUS smbd_smb2_request_process_close(struct smbd_smb2_request *req);
 310 NTSTATUS smbd_smb2_request_process_flush(struct smbd_smb2_request *req);
 311 NTSTATUS smbd_smb2_request_process_read(struct smbd_smb2_request *req);
 312 NTSTATUS smbd_smb2_request_process_write(struct smbd_smb2_request *req);
 313 NTSTATUS smbd_smb2_request_process_lock(struct smbd_smb2_request *req);
 314 NTSTATUS smbd_smb2_request_process_ioctl(struct smbd_smb2_request *req);
 315 NTSTATUS smbd_smb2_request_process_keepalive(struct smbd_smb2_request *req);
 316 NTSTATUS smbd_smb2_request_process_find(struct smbd_smb2_request *req);
 317 NTSTATUS smbd_smb2_request_process_notify(struct smbd_smb2_request *req);
 318 NTSTATUS smbd_smb2_request_process_getinfo(struct smbd_smb2_request *req);
 319 NTSTATUS smbd_smb2_request_process_setinfo(struct smbd_smb2_request *req);
 320 NTSTATUS smbd_smb2_request_process_break(struct smbd_smb2_request *req);
 321
 322 /* SMB1 -> SMB2 glue. */
 323 void send_break_message_smb2(files_struct *fsp, uint8_t level);
 324 bool push_blocking_lock_request_smb2( struct byte_range_lock *br_lck,
 325                                 struct smb_request *req,
 326                                 files_struct *fsp,
 327                                 int lock_timeout,
 328                                 int lock_num,
 329                                 uint32_t lock_pid,
 330                                 enum brl_type lock_type,
 331                                 enum brl_flavour lock_flav,
 332                                 uint64_t offset,
 333                                 uint64_t count,
 334                                 uint32_t blocking_pid);
 335 void remove_deferred_open_message_smb2(uint16_t mid);
 336 void schedule_deferred_open_message_smb2(uint16_t mid);
 337 bool open_was_deferred_smb2(uint16_t mid);
 338 bool get_deferred_open_message_state_smb2(uint16_t mid,
 339                         struct timeval *p_request_time,
 340                         void **pp_state);
 341 bool push_deferred_open_message_smb2(struct smb_request *req,
 342                         struct timeval request_time,
 343                         struct timeval timeout,
 344                         char *private_data,
 345                         size_t priv_len);
 346
 347 struct smbd_smb2_request {
 348         struct smbd_smb2_request *prev, *next;
 349
 350         TALLOC_CTX *mem_pool;
 351         struct smbd_smb2_request **parent;
 352
 353         struct smbd_server_connection *sconn;
 354
 355         /* the session the request operates on, maybe NULL */
 356         struct smbd_smb2_session *session;
 357
 358         /* the tcon the request operates on, maybe NULL */
 359         struct smbd_smb2_tcon *tcon;
 360
 361         int current_idx;
 362         bool do_signing;
 363         /*
 364          * mid used for compatibility with SMB1 code.
 365          * Server allocated, never seen by client.
 366          */
 367         uint16_t compat_mid;
 368
 369         struct files_struct *compat_chain_fsp;
 370
 371         NTSTATUS next_status;
 372
 373         /*
 374          * The sub request for async backend calls.
 375          * This is used for SMB2 Cancel.
 376          */
 377         struct tevent_req *subreq;
 378
 379         struct {
 380                 /* the NBT header is not allocated */
 381                 uint8_t nbt_hdr[4];
 382                 /*
 383                  * vector[0] NBT
 384                  * .
 385                  * vector[1] SMB2
 386                  * vector[2] fixed body
 387                  * vector[3] dynamic body
 388                  * .
 389                  * .
 390                  * .
 391                  * vector[4] SMB2
 392                  * vector[5] fixed body
 393                  * vector[6] dynamic body
 394                  * .
 395                  * .
 396                  * .
 397                  */
 398                 struct iovec *vector;
 399                 int vector_count;
 400         } in;
 401         struct {
 402                 /* the NBT header is not allocated */
 403                 uint8_t nbt_hdr[4];
 404                 /*
 405                  * vector[0] NBT
 406                  * .
 407                  * vector[1] SMB2
 408                  * vector[2] fixed body
 409                  * vector[3] dynamic body
 410                  * .
 411                  * .
 412                  * .
 413                  * vector[4] SMB2
 414                  * vector[5] fixed body
 415                  * vector[6] dynamic body
 416                  * .
 417                  * .
 418                  * .
 419                  */
 420                 struct iovec *vector;
 421                 int vector_count;
 422         } out;
 423 };
 424
 425 struct smbd_server_connection;
 426
 427 struct smbd_smb2_session {
 428         struct smbd_smb2_session *prev, *next;
 429         struct smbd_server_connection *sconn;
 430         NTSTATUS status;
 431         uint64_t vuid;
 432         AUTH_NTLMSSP_STATE *auth_ntlmssp_state;
 433         struct auth_serversupplied_info *server_info;
 434         DATA_BLOB session_key;
 435         bool do_signing;
 436
 437         user_struct *compat_vuser;
 438
 439         struct {
 440                 /* an id tree used to allocate tids */
 441                 struct idr_context *idtree;
 442
 443                 /* this is the limit of tid values for this connection */
 444                 uint32_t limit;
 445
 446                 struct smbd_smb2_tcon *list;
 447         } tcons;
 448 };
 449
 450 struct smbd_smb2_tcon {
 451         struct smbd_smb2_tcon *prev, *next;
 452         struct smbd_smb2_session *session;
 453         uint32_t tid;
 454         int snum;
 455         connection_struct *compat_conn;
 456 };
 457
 458 struct pending_auth_data;
 459
 460 struct smbd_server_connection {
 461         struct {
 462                 bool got_session;
 463         } nbt;
 464         bool allow_smb2;
 465         struct {
 466                 struct fd_event *fde;
 467
 468                 struct {
 469                         /*
 470                          * fd for the fcntl lock mutexing access to smbd_server_fd
 471                          */
 472                         int socket_lock_fd;
 473
 474                         /*
 475                          * fd for the trusted pipe from
 476                          * echo handler child
 477                          */
 478                         int trusted_fd;
 479
 480                         /*
 481                          * fde for the trusted_fd
 482                          */
 483                         struct fd_event *trusted_fde;
 484
 485                         /*
 486                          * Reference count for the fcntl lock to
 487                          * allow recursive locks.
 488                          */
 489                         int ref_count;
 490                 } echo_handler;
 491
 492                 uint64_t num_requests;
 493                 struct {
 494                         bool encrypted_passwords;
 495                         bool spnego;
 496                         struct auth_context *auth_context;
 497                         bool done;
 498                         /*
 499                          * Size of the data we can receive. Set by us.
 500                          * Can be modified by the max xmit parameter.
 501                          */
 502                         int max_recv;
 503                 } negprot;
 504
 505                 struct {
 506                         bool done_sesssetup;
 507                         /*
 508                          * Size of data we can send to client. Set
 509                          *  by the client for all protocols above CORE.
 510                          *  Set by us for CORE protocol.
 511                          */
 512                         int max_send;
 513                         uint16_t last_session_tag;
 514
 515                         /* users from session setup */
 516                         char *session_userlist;
 517                         /* workgroup from session setup. */
 518                         char *session_workgroup;
 519                         /*
 520                          * this holds info on user ids that are already
 521                          * validated for this VC
 522                          */
 523                         user_struct *validated_users;
 524                         uint16_t next_vuid;
 525                         int num_validated_vuids;
 526 #ifdef HAVE_NETGROUP
 527                         char *my_yp_domain;
 528 #endif
 529                 } sessions;
 530                 struct {
 531                         connection_struct *Connections;
 532                         /* number of open connections */
 533                         struct bitmap *bmap;
 534                         int num_open;
 535                 } tcons;
 536                 struct smb_signing_state *signing_state;
 537                 /* List to store partial SPNEGO auth fragments. */
 538                 struct pending_auth_data *pd_list;
 539
 540                 struct notify_mid_map *notify_mid_maps;
 541
 542                 struct {
 543                         struct bitmap *dptr_bmap;
 544                         struct dptr_struct *dirptrs;
 545                         int dirhandles_open;
 546                 } searches;
 547         } smb1;
 548         struct {
 549                 struct tevent_context *event_ctx;
 550                 struct tevent_queue *recv_queue;
 551                 struct tevent_queue *send_queue;
 552                 struct tstream_context *stream;
 553                 struct {
 554                         /* an id tree used to allocate vuids */
 555                         /* this holds info on session vuids that are already
 556                          * validated for this VC */
 557                         struct idr_context *idtree;
 558
 559                         /* this is the limit of vuid values for this connection */
 560                         uint64_t limit;
 561
 562                         struct smbd_smb2_session *list;
 563                 } sessions;
 564                 struct smbd_smb2_request *requests;
 565                 uint16_t next_compat_mid;
 566         } smb2;
 567 };
 568
 569 extern struct smbd_server_connection *smbd_server_conn;
 570
 571 void smbd_init_globals(void);