132 строки
3.9 KiB
C
132 строки
3.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
/*
|
|
* Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org>
|
|
* Copyright (C) 2018 Samsung Electronics Co., Ltd.
|
|
*/
|
|
|
|
#ifndef __KSMBD_OPLOCK_H
|
|
#define __KSMBD_OPLOCK_H
|
|
|
|
#include "smb_common.h"
|
|
|
|
#define OPLOCK_WAIT_TIME (35 * HZ)
|
|
|
|
/* SMB2 Oplock levels */
|
|
#define SMB2_OPLOCK_LEVEL_NONE 0x00
|
|
#define SMB2_OPLOCK_LEVEL_II 0x01
|
|
#define SMB2_OPLOCK_LEVEL_EXCLUSIVE 0x08
|
|
#define SMB2_OPLOCK_LEVEL_BATCH 0x09
|
|
#define SMB2_OPLOCK_LEVEL_LEASE 0xFF
|
|
|
|
/* Oplock states */
|
|
#define OPLOCK_STATE_NONE 0x00
|
|
#define OPLOCK_ACK_WAIT 0x01
|
|
#define OPLOCK_CLOSING 0x02
|
|
|
|
#define OPLOCK_WRITE_TO_READ 0x01
|
|
#define OPLOCK_READ_HANDLE_TO_READ 0x02
|
|
#define OPLOCK_WRITE_TO_NONE 0x04
|
|
#define OPLOCK_READ_TO_NONE 0x08
|
|
|
|
#define SMB2_LEASE_KEY_SIZE 16
|
|
|
|
struct lease_ctx_info {
|
|
__u8 lease_key[SMB2_LEASE_KEY_SIZE];
|
|
__le32 req_state;
|
|
__le32 flags;
|
|
__le64 duration;
|
|
__u8 parent_lease_key[SMB2_LEASE_KEY_SIZE];
|
|
int version;
|
|
};
|
|
|
|
struct lease_table {
|
|
char client_guid[SMB2_CLIENT_GUID_SIZE];
|
|
struct list_head lease_list;
|
|
struct list_head l_entry;
|
|
spinlock_t lb_lock;
|
|
};
|
|
|
|
struct lease {
|
|
__u8 lease_key[SMB2_LEASE_KEY_SIZE];
|
|
__le32 state;
|
|
__le32 new_state;
|
|
__le32 flags;
|
|
__le64 duration;
|
|
__u8 parent_lease_key[SMB2_LEASE_KEY_SIZE];
|
|
int version;
|
|
unsigned short epoch;
|
|
struct lease_table *l_lb;
|
|
};
|
|
|
|
struct oplock_info {
|
|
struct ksmbd_conn *conn;
|
|
struct ksmbd_session *sess;
|
|
struct ksmbd_work *work;
|
|
struct ksmbd_file *o_fp;
|
|
int level;
|
|
int op_state;
|
|
unsigned long pending_break;
|
|
u64 fid;
|
|
atomic_t breaking_cnt;
|
|
atomic_t refcount;
|
|
__u16 Tid;
|
|
bool is_lease;
|
|
bool open_trunc; /* truncate on open */
|
|
struct lease *o_lease;
|
|
struct list_head interim_list;
|
|
struct list_head op_entry;
|
|
struct list_head lease_entry;
|
|
wait_queue_head_t oplock_q; /* Other server threads */
|
|
wait_queue_head_t oplock_brk; /* oplock breaking wait */
|
|
struct rcu_head rcu_head;
|
|
};
|
|
|
|
struct lease_break_info {
|
|
__le32 curr_state;
|
|
__le32 new_state;
|
|
__le16 epoch;
|
|
char lease_key[SMB2_LEASE_KEY_SIZE];
|
|
};
|
|
|
|
struct oplock_break_info {
|
|
int level;
|
|
int open_trunc;
|
|
int fid;
|
|
};
|
|
|
|
int smb_grant_oplock(struct ksmbd_work *work, int req_op_level,
|
|
u64 pid, struct ksmbd_file *fp, __u16 tid,
|
|
struct lease_ctx_info *lctx, int share_ret);
|
|
void smb_break_all_levII_oplock(struct ksmbd_work *work,
|
|
struct ksmbd_file *fp, int is_trunc);
|
|
int opinfo_write_to_read(struct oplock_info *opinfo);
|
|
int opinfo_read_handle_to_read(struct oplock_info *opinfo);
|
|
int opinfo_write_to_none(struct oplock_info *opinfo);
|
|
int opinfo_read_to_none(struct oplock_info *opinfo);
|
|
void close_id_del_oplock(struct ksmbd_file *fp);
|
|
void smb_break_all_oplock(struct ksmbd_work *work, struct ksmbd_file *fp);
|
|
struct oplock_info *opinfo_get(struct ksmbd_file *fp);
|
|
void opinfo_put(struct oplock_info *opinfo);
|
|
|
|
/* Lease related functions */
|
|
void create_lease_buf(u8 *rbuf, struct lease *lease);
|
|
struct lease_ctx_info *parse_lease_state(void *open_req);
|
|
__u8 smb2_map_lease_to_oplock(__le32 lease_state);
|
|
int lease_read_to_write(struct oplock_info *opinfo);
|
|
|
|
/* Durable related functions */
|
|
void create_durable_rsp_buf(char *cc);
|
|
void create_durable_v2_rsp_buf(char *cc, struct ksmbd_file *fp);
|
|
void create_mxac_rsp_buf(char *cc, int maximal_access);
|
|
void create_disk_id_rsp_buf(char *cc, __u64 file_id, __u64 vol_id);
|
|
void create_posix_rsp_buf(char *cc, struct ksmbd_file *fp);
|
|
struct create_context *smb2_find_context_vals(void *open_req, const char *str);
|
|
struct oplock_info *lookup_lease_in_table(struct ksmbd_conn *conn,
|
|
char *lease_key);
|
|
int find_same_lease_key(struct ksmbd_session *sess, struct ksmbd_inode *ci,
|
|
struct lease_ctx_info *lctx);
|
|
void destroy_lease_table(struct ksmbd_conn *conn);
|
|
int smb2_check_durable_oplock(struct ksmbd_file *fp,
|
|
struct lease_ctx_info *lctx, char *name);
|
|
#endif /* __KSMBD_OPLOCK_H */
|