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/*
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 <http://www.gnu.org/licenses/>.
*/
#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;
struct tdb_context;
extern struct 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;
extern pid_t background_lpq_updater_pid;
/****************************************************************************
structure to hold a linked list of queued messages.
for processing.
****************************************************************************/
extern uint32_t common_flags2;
extern struct smb_trans_enc_state *partial_srv_trans_enc_ctx;
extern struct smb_trans_enc_state *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 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_calculate_access_mask(connection_struct *conn,
const struct smb_filename *smb_fname,
bool file_existed,
uint32_t access_mask,
uint32_t *access_mask_out);
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 reply_smb20ff(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,
uint32_t defer_time);
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_verify_sizes(struct smbd_smb2_request *req,
size_t expected_body_size);
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;
uint64_t last_session_id;
/* the tcon the request operates on, maybe NULL */
struct smbd_smb2_tcon *tcon;
uint32_t last_tid;
int current_idx;
bool do_signing;
struct tevent_timer *async_te;
bool cancelled;
bool compound_related;
/* 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_session_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_message_list;
struct pending_auth_data;
struct smbd_server_connection {
int sock;
const struct tsocket_address *local_address;
const struct tsocket_address *remote_address;
const char *remote_hostname;
struct tevent_context *ev_ctx;
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;
/* Try GENSEC hook */
bool use_gensec_hook;
/* number of open connections (tcons) */
int num_tcons_open;
struct pending_message_list *deferred_open_queue;
/* open directory handles. */
struct {
struct bitmap *dptr_bmap;
struct dptr_struct *dirptrs;
int dirhandles_open;
} searches;
uint64_t num_requests;
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;
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 {
uint16_t client_major;
uint16_t client_minor;
uint32_t client_cap_low;
uint32_t client_cap_high;
} unix_info;
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;
bool negprot_2ff;
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;
uint32_t max_trans;
uint32_t max_read;
uint32_t max_write;
struct bitmap *credits_bitmap;
bool compound_related_in_progress;
} 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);
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