samba-mirror/source3/locking/proto.h

/*
 *  Unix SMB/CIFS implementation.
 *  Locking functions
 *
 *  Copyright (C) Andrew Tridgell	1992-2000
 *  Copyright (C) Jeremy Allison	1992-2006
 *  Copyright (C) Volker Lendecke	2005
 *
 *  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/>.
 */

#ifndef _LOCKING_PROTO_H_
#define _LOCKING_PROTO_H_

/* The following definitions come from locking/brlock.c  */

void brl_init(bool read_only);
void brl_shutdown(void);

unsigned int brl_num_locks(const struct byte_range_lock *brl);
struct files_struct *brl_fsp(struct byte_range_lock *brl);
uint32_t brl_num_read_oplocks(const struct byte_range_lock *brl);
void brl_set_num_read_oplocks(struct byte_range_lock *brl,
			      uint32_t num_read_oplocks);

NTSTATUS brl_lock_windows_default(struct byte_range_lock *br_lck,
		struct lock_struct *plock,
		bool blocking_lock);

NTSTATUS brl_lock(struct messaging_context *msg_ctx,
		struct byte_range_lock *br_lck,
		uint64_t smblctx,
		struct server_id pid,
		br_off start,
		br_off size,
		enum brl_type lock_type,
		enum brl_flavour lock_flav,
		bool blocking_lock,
		uint64_t *psmblctx);
bool brl_unlock(struct messaging_context *msg_ctx,
		struct byte_range_lock *br_lck,
		uint64_t smblctx,
		struct server_id pid,
		br_off start,
		br_off size,
		enum brl_flavour lock_flav);
bool brl_unlock_windows_default(struct messaging_context *msg_ctx,
			       struct byte_range_lock *br_lck,
			       const struct lock_struct *plock);
bool brl_locktest(struct byte_range_lock *br_lck,
		  const struct lock_struct *rw_probe);
NTSTATUS brl_lockquery(struct byte_range_lock *br_lck,
		uint64_t *psmblctx,
		struct server_id pid,
		br_off *pstart,
		br_off *psize,
		enum brl_type *plock_type,
		enum brl_flavour lock_flav);
bool brl_lock_cancel(struct byte_range_lock *br_lck,
		uint64_t smblctx,
		struct server_id pid,
		br_off start,
		br_off size,
		enum brl_flavour lock_flav);
bool brl_lock_cancel_default(struct byte_range_lock *br_lck,
		struct lock_struct *plock);
bool brl_mark_disconnected(struct files_struct *fsp);
bool brl_reconnect_disconnected(struct files_struct *fsp);
void brl_close_fnum(struct messaging_context *msg_ctx,
		    struct byte_range_lock *br_lck);
int brl_forall(void (*fn)(struct file_id id, struct server_id pid,
			  enum brl_type lock_type,
			  enum brl_flavour lock_flav,
			  br_off start, br_off size,
			  void *private_data),
	       void *private_data);
struct byte_range_lock *brl_get_locks(TALLOC_CTX *mem_ctx,
					files_struct *fsp);
struct byte_range_lock *brl_get_locks_readonly(files_struct *fsp);
void brl_revalidate(struct messaging_context *msg_ctx,
		    void *private_data,
		    uint32_t msg_type,
		    struct server_id server_id,
		    DATA_BLOB *data);
bool brl_cleanup_disconnected(struct file_id fid, uint64_t open_persistent_id);

/* The following definitions come from locking/locking.c  */

const char *lock_type_name(enum brl_type lock_type);
const char *lock_flav_name(enum brl_flavour lock_flav);
void init_strict_lock_struct(files_struct *fsp,
				uint64_t smblctx,
				br_off start,
				br_off size,
				enum brl_type lock_type,
				struct lock_struct *plock);
bool strict_lock_check_default(files_struct *fsp,
			       struct lock_struct *plock);
NTSTATUS query_lock(files_struct *fsp,
			uint64_t *psmblctx,
			uint64_t *pcount,
			uint64_t *poffset,
			enum brl_type *plock_type,
			enum brl_flavour lock_flav);
struct byte_range_lock *do_lock(struct messaging_context *msg_ctx,
			files_struct *fsp,
			uint64_t smblctx,
			uint64_t count,
			uint64_t offset,
			enum brl_type lock_type,
			enum brl_flavour lock_flav,
			bool blocking_lock,
			NTSTATUS *perr,
			uint64_t *psmblctx);
NTSTATUS do_unlock(struct messaging_context *msg_ctx,
			files_struct *fsp,
			uint64_t smblctx,
			uint64_t count,
			uint64_t offset,
			enum brl_flavour lock_flav);
NTSTATUS do_lock_cancel(files_struct *fsp,
			uint64_t smblctx,
			uint64_t count,
			uint64_t offset,
			enum brl_flavour lock_flav);
void locking_close_file(struct messaging_context *msg_ctx,
			files_struct *fsp,
			enum file_close_type close_type);
bool locking_init(void);
bool locking_init_readonly(void);
bool locking_end(void);
char *share_mode_str(TALLOC_CTX *ctx, int num,
		     const struct file_id *id,
		     const struct share_mode_entry *e);
struct share_mode_lock *get_existing_share_mode_lock(TALLOC_CTX *mem_ctx,
						     struct file_id id);
struct share_mode_lock *get_share_mode_lock(
	TALLOC_CTX *mem_ctx,
	struct file_id id,
	const char *servicepath,
	const struct smb_filename *smb_fname,
	const struct timespec *old_write_time);
struct share_mode_lock *fetch_share_mode_unlocked(TALLOC_CTX *mem_ctx,
						  struct file_id id);
struct tevent_req *fetch_share_mode_send(TALLOC_CTX *mem_ctx,
					 struct tevent_context *ev,
					 struct file_id id,
					 bool *queued);
NTSTATUS fetch_share_mode_recv(struct tevent_req *req,
			       TALLOC_CTX *mem_ctx,
			       struct share_mode_lock **_lck);
bool rename_share_filename(struct messaging_context *msg_ctx,
			struct share_mode_lock *lck,
			struct file_id id,
			const char *servicepath,
			uint32_t orig_name_hash,
			uint32_t new_name_hash,
			const struct smb_filename *smb_fname);
void get_file_infos(struct file_id id,
		    uint32_t name_hash,
		    bool *delete_on_close,
		    struct timespec *write_time);
bool is_valid_share_mode_entry(const struct share_mode_entry *e);
bool share_mode_stale_pid(struct share_mode_data *d, uint32_t idx);
bool set_share_mode(struct share_mode_lock *lck, struct files_struct *fsp,
		    uid_t uid, uint64_t mid, uint16_t op_type,
		    uint32_t lease_idx);
struct share_mode_entry *find_share_mode_entry(struct share_mode_lock *lck,
					       files_struct *fsp);
void remove_stale_share_mode_entries(struct share_mode_data *d);
bool del_share_mode(struct share_mode_lock *lck, files_struct *fsp);
bool mark_share_mode_disconnected(struct share_mode_lock *lck,
				  struct files_struct *fsp);
bool remove_share_oplock(struct share_mode_lock *lck, files_struct *fsp);
bool downgrade_share_oplock(struct share_mode_lock *lck, files_struct *fsp);
bool get_delete_on_close_token(struct share_mode_lock *lck,
				uint32_t name_hash,
				const struct security_token **pp_nt_tok,
				const struct security_unix_token **pp_tok);
void reset_delete_on_close_lck(files_struct *fsp,
			       struct share_mode_lock *lck);
void set_delete_on_close_lck(files_struct *fsp,
			struct share_mode_lock *lck,
			const struct security_token *nt_tok,
			const struct security_unix_token *tok);
bool set_delete_on_close(files_struct *fsp, bool delete_on_close,
			const struct security_token *nt_tok,
			const struct security_unix_token *tok);
bool is_delete_on_close_set(struct share_mode_lock *lck, uint32_t name_hash);
bool set_sticky_write_time(struct file_id fileid, struct timespec write_time);
bool set_write_time(struct file_id fileid, struct timespec write_time);
struct timespec get_share_mode_write_time(struct share_mode_lock *lck);
bool file_has_open_streams(files_struct *fsp);
int share_mode_forall(int (*fn)(struct file_id fid,
				const struct share_mode_data *data,
				void *private_data),
		      void *private_data);
int share_entry_forall(int (*fn)(struct file_id fid,
				 const struct share_mode_data *data,
				 const struct share_mode_entry *entry,
				 void *private_data),
		      void *private_data);
bool share_mode_cleanup_disconnected(struct file_id id,
				     uint64_t open_persistent_id);


/* The following definitions come from locking/posix.c  */

bool is_posix_locked(files_struct *fsp,
			uint64_t *pu_offset,
			uint64_t *pu_count,
			enum brl_type *plock_type,
			enum brl_flavour lock_flav);
bool posix_locking_init(bool read_only);
bool posix_locking_end(void);
int fd_close_posix(const struct files_struct *fsp);
bool set_posix_lock_windows_flavour(files_struct *fsp,
			uint64_t u_offset,
			uint64_t u_count,
			enum brl_type lock_type,
			const struct lock_context *lock_ctx,
			const struct lock_struct *plocks,
			int num_locks,
			int *errno_ret);
bool release_posix_lock_windows_flavour(files_struct *fsp,
				uint64_t u_offset,
				uint64_t u_count,
				enum brl_type deleted_lock_type,
				const struct lock_context *lock_ctx,
				const struct lock_struct *plocks,
				int num_locks);
bool set_posix_lock_posix_flavour(files_struct *fsp,
			uint64_t u_offset,
			uint64_t u_count,
			enum brl_type lock_type,
			const struct lock_context *lock_ctx,
			int *errno_ret);
bool release_posix_lock_posix_flavour(files_struct *fsp,
				uint64_t u_offset,
				uint64_t u_count,
				const struct lock_context *lock_ctx,
				const struct lock_struct *plocks,
				int num_locks);

/* The following definitions come from locking/leases_util.c */
uint32_t map_oplock_to_lease_type(uint16_t op_type);
uint32_t fsp_lease_type(const struct files_struct *fsp);
uint32_t lease_type_is_exclusive(uint32_t lease_type);
bool fsp_lease_type_is_exclusive(const struct files_struct *fsp);

#endif /* _LOCKING_PROTO_H_ */