/* Unix SMB/Netbios implementation. smbd globals Copyright (C) Stefan Metzmacher 2009 Copyright (C) Jeremy Allison 2010 This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . */ #include "system/select.h" #if defined(WITH_AIO) struct aio_extra; extern struct aio_extra *aio_list_head; extern struct tevent_signal *aio_signal_event; extern int aio_pending_size; extern int outstanding_aio_calls; #endif #ifdef USE_DMAPI struct smbd_dmapi_context; extern struct smbd_dmapi_context *dmapi_ctx; #endif extern bool dfree_broken; /* how many write cache buffers have been allocated */ extern unsigned int allocated_write_caches; /* A singleton cache to speed up searching by dev/inode. */ struct fsp_singleton_cache { files_struct *fsp; struct file_id id; }; extern const struct mangle_fns *mangle_fns; extern unsigned char *chartest; extern TDB_CONTEXT *tdb_mangled_cache; /* this determines how many characters are used from the original filename in the 8.3 mangled name. A larger value leads to a weaker hash and more collisions. The largest possible value is 6. */ extern unsigned mangle_prefix; struct msg_state; extern struct msg_state *smbd_msg_state; extern bool logged_ioctl_message; extern int trans_num; extern time_t last_smb_conf_reload_time; extern time_t last_printer_reload_time; /**************************************************************************** structure to hold a linked list of queued messages. for processing. ****************************************************************************/ struct pending_message_list; extern struct pending_message_list *deferred_open_queue; extern uint32_t common_flags2; struct smb_srv_trans_enc_ctx; extern struct smb_srv_trans_enc_ctx *partial_srv_trans_enc_ctx; extern struct smb_srv_trans_enc_ctx *srv_trans_enc_ctx; struct sec_ctx { struct security_unix_token ut; struct security_token *token; }; /* A stack of security contexts. We include the current context as being the first one, so there is room for another MAX_SEC_CTX_DEPTH more. */ extern struct sec_ctx sec_ctx_stack[MAX_SEC_CTX_DEPTH + 1]; extern int sec_ctx_stack_ndx; extern bool become_uid_done; extern bool become_gid_done; extern connection_struct *last_conn; extern uint16_t last_flags; extern uint32_t global_client_caps; extern uint16_t fnf_handle; struct conn_ctx { connection_struct *conn; uint16 vuid; }; /* A stack of current_user connection contexts. */ extern struct conn_ctx conn_ctx_stack[MAX_SEC_CTX_DEPTH]; extern int conn_ctx_stack_ndx; struct vfs_init_function_entry; extern struct vfs_init_function_entry *backends; extern char *sparse_buf; extern char *LastDir; /* Current number of oplocks we have outstanding. */ extern int32_t exclusive_oplocks_open; extern int32_t level_II_oplocks_open; extern struct kernel_oplocks *koplocks; extern int am_parent; extern struct event_context *smbd_event_ctx; extern struct messaging_context *smbd_msg_ctx; extern struct memcache *smbd_memcache_ctx; extern bool exit_firsttime; struct child_pid; extern struct child_pid *children; extern int num_children; struct tstream_context; struct smbd_smb2_request; struct smbd_smb2_session; struct smbd_smb2_tcon; DATA_BLOB negprot_spnego(TALLOC_CTX *ctx, struct smbd_server_connection *sconn); void smbd_lock_socket(struct smbd_server_connection *sconn); void smbd_unlock_socket(struct smbd_server_connection *sconn); NTSTATUS smb2_signing_sign_pdu(DATA_BLOB session_key, struct iovec *vector, int count); NTSTATUS smb2_signing_check_pdu(DATA_BLOB session_key, const struct iovec *vector, int count); NTSTATUS smbd_do_locking(struct smb_request *req, files_struct *fsp, uint8_t type, int32_t timeout, uint16_t num_ulocks, struct smbd_lock_element *ulocks, uint16_t num_locks, struct smbd_lock_element *locks, bool *async); NTSTATUS smbd_do_qfilepathinfo(connection_struct *conn, TALLOC_CTX *mem_ctx, uint16_t info_level, files_struct *fsp, struct smb_filename *smb_fname, bool delete_pending, struct timespec write_time_ts, struct ea_list *ea_list, int lock_data_count, char *lock_data, uint16_t flags2, unsigned int max_data_bytes, char **ppdata, unsigned int *pdata_size); NTSTATUS smbd_do_setfilepathinfo(connection_struct *conn, struct smb_request *req, TALLOC_CTX *mem_ctx, uint16_t info_level, files_struct *fsp, struct smb_filename *smb_fname, char **ppdata, int total_data, int *ret_data_size); NTSTATUS smbd_do_qfsinfo(connection_struct *conn, TALLOC_CTX *mem_ctx, uint16_t info_level, uint16_t flags2, unsigned int max_data_bytes, char **ppdata, int *ret_data_len); bool smbd_dirptr_get_entry(TALLOC_CTX *ctx, struct dptr_struct *dirptr, const char *mask, uint32_t dirtype, bool dont_descend, bool ask_sharemode, bool (*match_fn)(TALLOC_CTX *ctx, void *private_data, const char *dname, const char *mask, char **_fname), bool (*mode_fn)(TALLOC_CTX *ctx, void *private_data, struct smb_filename *smb_fname, uint32_t *_mode), void *private_data, char **_fname, struct smb_filename **_smb_fname, uint32_t *_mode, long *_prev_offset); bool smbd_dirptr_lanman2_entry(TALLOC_CTX *ctx, connection_struct *conn, struct dptr_struct *dirptr, uint16 flags2, const char *path_mask, uint32 dirtype, int info_level, int requires_resume_key, bool dont_descend, bool ask_sharemode, uint8_t align, bool do_pad, char **ppdata, char *base_data, char *end_data, int space_remaining, bool *out_of_space, bool *got_exact_match, int *_last_entry_off, struct ea_list *name_list); NTSTATUS smbd_check_open_rights(struct connection_struct *conn, const struct smb_filename *smb_fname, uint32_t access_mask, uint32_t *access_granted); void smbd_notify_cancel_by_smbreq(const struct smb_request *smbreq); void smbd_server_connection_terminate_ex(struct smbd_server_connection *sconn, const char *reason, const char *location); #define smbd_server_connection_terminate(sconn, reason) \ smbd_server_connection_terminate_ex(sconn, reason, __location__) struct server_id sconn_server_id(const struct smbd_server_connection *sconn); const char *smb2_opcode_name(uint16_t opcode); bool smbd_is_smb2_header(const uint8_t *inbuf, size_t size); void reply_smb2002(struct smb_request *req, uint16_t choice); void smbd_smb2_first_negprot(struct smbd_server_connection *sconn, const uint8_t *inbuf, size_t size); NTSTATUS smbd_smb2_request_error_ex(struct smbd_smb2_request *req, NTSTATUS status, DATA_BLOB *info, const char *location); #define smbd_smb2_request_error(req, status) \ smbd_smb2_request_error_ex(req, status, NULL, __location__) NTSTATUS smbd_smb2_request_done_ex(struct smbd_smb2_request *req, NTSTATUS status, DATA_BLOB body, DATA_BLOB *dyn, const char *location); #define smbd_smb2_request_done(req, body, dyn) \ smbd_smb2_request_done_ex(req, NT_STATUS_OK, body, dyn, __location__) NTSTATUS smbd_smb2_send_oplock_break(struct smbd_server_connection *sconn, uint64_t file_id_persistent, uint64_t file_id_volatile, uint8_t oplock_level); NTSTATUS smbd_smb2_request_pending_queue(struct smbd_smb2_request *req, struct tevent_req *subreq); NTSTATUS smbd_smb2_request_check_session(struct smbd_smb2_request *req); NTSTATUS smbd_smb2_request_check_tcon(struct smbd_smb2_request *req); struct smb_request *smbd_smb2_fake_smb_request(struct smbd_smb2_request *req); void remove_smb2_chained_fsp(files_struct *fsp); NTSTATUS smbd_smb2_request_process_negprot(struct smbd_smb2_request *req); NTSTATUS smbd_smb2_request_process_sesssetup(struct smbd_smb2_request *req); NTSTATUS smbd_smb2_request_process_logoff(struct smbd_smb2_request *req); NTSTATUS smbd_smb2_request_process_tcon(struct smbd_smb2_request *req); NTSTATUS smbd_smb2_request_process_tdis(struct smbd_smb2_request *req); NTSTATUS smbd_smb2_request_process_create(struct smbd_smb2_request *req); NTSTATUS smbd_smb2_request_process_close(struct smbd_smb2_request *req); NTSTATUS smbd_smb2_request_process_flush(struct smbd_smb2_request *req); NTSTATUS smbd_smb2_request_process_read(struct smbd_smb2_request *req); NTSTATUS smb2_read_complete(struct tevent_req *req, ssize_t nread, int err); NTSTATUS smbd_smb2_request_process_write(struct smbd_smb2_request *req); NTSTATUS smb2_write_complete(struct tevent_req *req, ssize_t nwritten, int err); NTSTATUS smbd_smb2_request_process_lock(struct smbd_smb2_request *req); NTSTATUS smbd_smb2_request_process_ioctl(struct smbd_smb2_request *req); NTSTATUS smbd_smb2_request_process_keepalive(struct smbd_smb2_request *req); NTSTATUS smbd_smb2_request_process_find(struct smbd_smb2_request *req); NTSTATUS smbd_smb2_request_process_notify(struct smbd_smb2_request *req); NTSTATUS smbd_smb2_request_process_getinfo(struct smbd_smb2_request *req); NTSTATUS smbd_smb2_request_process_setinfo(struct smbd_smb2_request *req); NTSTATUS smbd_smb2_request_process_break(struct smbd_smb2_request *req); NTSTATUS smbd_smb2_request_dispatch(struct smbd_smb2_request *req); void smbd_smb2_request_dispatch_immediate(struct tevent_context *ctx, struct tevent_immediate *im, void *private_data); /* SMB1 -> SMB2 glue. */ void send_break_message_smb2(files_struct *fsp, int level); struct blocking_lock_record *get_pending_smb2req_blr(struct smbd_smb2_request *smb2req); bool push_blocking_lock_request_smb2( struct byte_range_lock *br_lck, struct smb_request *req, files_struct *fsp, int lock_timeout, int lock_num, uint64_t smblctx, enum brl_type lock_type, enum brl_flavour lock_flav, uint64_t offset, uint64_t count, uint64_t blocking_smblctx); void process_blocking_lock_queue_smb2( struct smbd_server_connection *sconn, struct timeval tv_curr); void cancel_pending_lock_requests_by_fid_smb2(files_struct *fsp, struct byte_range_lock *br_lck, enum file_close_type close_type); /* From smbd/smb2_create.c */ int map_smb2_oplock_levels_to_samba(uint8_t in_oplock_level); bool get_deferred_open_message_state_smb2(struct smbd_smb2_request *smb2req, struct timeval *p_request_time, void **pp_state); bool open_was_deferred_smb2(struct smbd_server_connection *sconn, uint64_t mid); void remove_deferred_open_message_smb2( struct smbd_server_connection *sconn, uint64_t mid); void schedule_deferred_open_message_smb2( struct smbd_server_connection *sconn, uint64_t mid); bool push_deferred_open_message_smb2(struct smbd_smb2_request *smb2req, struct timeval request_time, struct timeval timeout, struct file_id id, char *private_data, size_t priv_len); struct smbd_smb2_request { struct smbd_smb2_request *prev, *next; TALLOC_CTX *mem_pool; struct smbd_smb2_request **parent; struct smbd_server_connection *sconn; /* the session the request operates on, maybe NULL */ struct smbd_smb2_session *session; /* the tcon the request operates on, maybe NULL */ struct smbd_smb2_tcon *tcon; int current_idx; bool do_signing; bool async; bool cancelled; /* fake smb1 request. */ struct smb_request *smb1req; struct files_struct *compat_chain_fsp; NTSTATUS next_status; /* * The sub request for async backend calls. * This is used for SMB2 Cancel. */ struct tevent_req *subreq; struct { /* the NBT header is not allocated */ uint8_t nbt_hdr[4]; /* * vector[0] NBT * . * vector[1] SMB2 * vector[2] fixed body * vector[3] dynamic body * . * . * . * vector[4] SMB2 * vector[5] fixed body * vector[6] dynamic body * . * . * . */ struct iovec *vector; int vector_count; } in; struct { /* the NBT header is not allocated */ uint8_t nbt_hdr[4]; /* * vector[0] NBT * . * vector[1] SMB2 * vector[2] fixed body * vector[3] dynamic body * . * . * . * vector[4] SMB2 * vector[5] fixed body * vector[6] dynamic body * . * . * . */ struct iovec *vector; int vector_count; } out; }; struct smbd_server_connection; struct smbd_smb2_session { struct smbd_smb2_session *prev, *next; struct smbd_server_connection *sconn; NTSTATUS status; uint64_t vuid; struct auth_ntlmssp_state *auth_ntlmssp_state; struct auth_serversupplied_info *session_info; DATA_BLOB session_key; bool do_signing; user_struct *compat_vuser; struct { /* an id tree used to allocate tids */ struct idr_context *idtree; /* this is the limit of tid values for this connection */ uint32_t limit; struct smbd_smb2_tcon *list; } tcons; }; struct smbd_smb2_tcon { struct smbd_smb2_tcon *prev, *next; struct smbd_smb2_session *session; uint32_t tid; int snum; connection_struct *compat_conn; }; struct pending_auth_data; struct smbd_server_connection { int sock; struct client_address client_id; const struct tsocket_address *local_address; const struct tsocket_address *remote_address; struct messaging_context *msg_ctx; struct { bool got_session; } nbt; bool using_smb2; int trans_num; /* * Cache for calling poll(2) to avoid allocations in our * central event loop */ struct pollfd *pfds; struct files_struct *files; struct bitmap *file_bmap; int real_max_open_files; int files_used; struct fsp_singleton_cache fsp_fi_cache; unsigned long file_gen_counter; int first_file; /* number of open connections (tcons) */ int num_tcons_open; /* open directory handles. */ struct { struct bitmap *dptr_bmap; struct dptr_struct *dirptrs; int dirhandles_open; } searches; struct { struct fd_event *fde; struct { /* * fd for the fcntl lock mutexing access to our sock */ int socket_lock_fd; /* * fd for the trusted pipe from * echo handler child */ int trusted_fd; /* * fde for the trusted_fd */ struct fd_event *trusted_fde; /* * Reference count for the fcntl lock to * allow recursive locks. */ int ref_count; } echo_handler; uint64_t num_requests; struct { bool encrypted_passwords; bool spnego; struct auth_context *auth_context; bool done; /* * Size of the data we can receive. Set by us. * Can be modified by the max xmit parameter. */ int max_recv; } negprot; struct { bool done_sesssetup; /* * Size of data we can send to client. Set * by the client for all protocols above CORE. * Set by us for CORE protocol. */ int max_send; uint16_t last_session_tag; /* users from session setup */ char *session_userlist; /* workgroup from session setup. */ char *session_workgroup; /* * this holds info on user ids that are already * validated for this VC */ user_struct *validated_users; uint16_t next_vuid; int num_validated_vuids; } sessions; struct { connection_struct *Connections; /* number of open connections */ struct bitmap *bmap; } tcons; struct smb_signing_state *signing_state; /* List to store partial SPNEGO auth fragments. */ struct pending_auth_data *pd_list; struct notify_mid_map *notify_mid_maps; struct { /* dlink list we store pending lock records on. */ struct blocking_lock_record *blocking_lock_queue; /* dlink list we move cancelled lock records onto. */ struct blocking_lock_record *blocking_lock_cancelled_queue; /* The event that makes us process our blocking lock queue */ struct timed_event *brl_timeout; bool blocking_lock_unlock_state; bool blocking_lock_cancel_state; } locks; } smb1; struct { struct tevent_context *event_ctx; struct tevent_queue *recv_queue; struct tevent_queue *send_queue; struct tstream_context *stream; struct { /* an id tree used to allocate vuids */ /* this holds info on session vuids that are already * validated for this VC */ struct idr_context *idtree; /* this is the limit of vuid values for this connection */ uint64_t limit; struct smbd_smb2_session *list; } sessions; struct { /* The event that makes us process our blocking lock queue */ struct timed_event *brl_timeout; bool blocking_lock_unlock_state; } locks; struct smbd_smb2_request *requests; uint64_t seqnum_low; uint32_t credits_granted; uint32_t max_credits; struct bitmap *credits_bitmap; } smb2; }; extern struct smbd_server_connection *smbd_server_conn; struct smbd_server_connection *msg_ctx_to_sconn(struct messaging_context *msg_ctx); void smbd_init_globals(void);