132 lines · c
1/* SPDX-License-Identifier: GPL-2.0-or-later */2/*3 * Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org>4 * Copyright (C) 2018 Samsung Electronics Co., Ltd.5 */6 7#ifndef __KSMBD_OPLOCK_H8#define __KSMBD_OPLOCK_H9 10#include "smb_common.h"11 12#define OPLOCK_WAIT_TIME (35 * HZ)13 14/* Oplock states */15#define OPLOCK_STATE_NONE 0x0016#define OPLOCK_ACK_WAIT 0x0117#define OPLOCK_CLOSING 0x0218 19#define OPLOCK_WRITE_TO_READ 0x0120#define OPLOCK_READ_HANDLE_TO_READ 0x0221#define OPLOCK_WRITE_TO_NONE 0x0422#define OPLOCK_READ_TO_NONE 0x0823 24struct lease_ctx_info {25 __u8 lease_key[SMB2_LEASE_KEY_SIZE];26 __le32 req_state;27 __le32 flags;28 __le64 duration;29 __u8 parent_lease_key[SMB2_LEASE_KEY_SIZE];30 __le16 epoch;31 int version;32 bool is_dir;33};34 35struct lease_table {36 char client_guid[SMB2_CLIENT_GUID_SIZE];37 struct list_head lease_list;38 struct list_head l_entry;39 spinlock_t lb_lock;40};41 42struct lease {43 __u8 lease_key[SMB2_LEASE_KEY_SIZE];44 __le32 state;45 __le32 new_state;46 __le32 flags;47 __le64 duration;48 __u8 parent_lease_key[SMB2_LEASE_KEY_SIZE];49 int version;50 unsigned short epoch;51 bool is_dir;52 struct lease_table *l_lb;53};54 55struct oplock_info {56 struct ksmbd_conn *conn;57 struct ksmbd_session *sess;58 struct ksmbd_work *work;59 struct ksmbd_file *o_fp;60 int level;61 int op_state;62 unsigned long pending_break;63 u64 fid;64 atomic_t breaking_cnt;65 atomic_t refcount;66 __u16 Tid;67 bool is_lease;68 bool open_trunc; /* truncate on open */69 struct lease *o_lease;70 struct list_head interim_list;71 struct list_head op_entry;72 struct list_head lease_entry;73 wait_queue_head_t oplock_q; /* Other server threads */74 wait_queue_head_t oplock_brk; /* oplock breaking wait */75 struct rcu_head rcu_head;76};77 78struct lease_break_info {79 __le32 curr_state;80 __le32 new_state;81 __le16 epoch;82 char lease_key[SMB2_LEASE_KEY_SIZE];83};84 85struct oplock_break_info {86 int level;87 int open_trunc;88 int fid;89};90 91int smb_grant_oplock(struct ksmbd_work *work, int req_op_level,92 u64 pid, struct ksmbd_file *fp, __u16 tid,93 struct lease_ctx_info *lctx, int share_ret);94void smb_break_all_levII_oplock(struct ksmbd_work *work,95 struct ksmbd_file *fp, int is_trunc);96int opinfo_write_to_read(struct oplock_info *opinfo);97int opinfo_read_handle_to_read(struct oplock_info *opinfo);98int opinfo_write_to_none(struct oplock_info *opinfo);99int opinfo_read_to_none(struct oplock_info *opinfo);100void close_id_del_oplock(struct ksmbd_file *fp);101void smb_break_all_oplock(struct ksmbd_work *work, struct ksmbd_file *fp);102struct oplock_info *opinfo_get(struct ksmbd_file *fp);103void opinfo_put(struct oplock_info *opinfo);104 105/* Lease related functions */106void create_lease_buf(u8 *rbuf, struct lease *lease);107struct lease_ctx_info *parse_lease_state(void *open_req);108__u8 smb2_map_lease_to_oplock(__le32 lease_state);109int lease_read_to_write(struct oplock_info *opinfo);110 111/* Durable related functions */112void create_durable_rsp_buf(char *cc);113void create_durable_v2_rsp_buf(char *cc, struct ksmbd_file *fp);114void create_mxac_rsp_buf(char *cc, int maximal_access);115void create_disk_id_rsp_buf(char *cc, __u64 file_id, __u64 vol_id);116void create_posix_rsp_buf(char *cc, struct ksmbd_file *fp);117struct create_context *smb2_find_context_vals(void *open_req, const char *tag, int tag_len);118struct oplock_info *lookup_lease_in_table(struct ksmbd_conn *conn,119 char *lease_key);120int find_same_lease_key(struct ksmbd_session *sess, struct ksmbd_inode *ci,121 struct lease_ctx_info *lctx);122void destroy_lease_table(struct ksmbd_conn *conn);123void smb_send_parent_lease_break_noti(struct ksmbd_file *fp,124 struct lease_ctx_info *lctx);125void smb_lazy_parent_lease_break_close(struct ksmbd_file *fp);126int smb2_check_durable_oplock(struct ksmbd_conn *conn,127 struct ksmbd_share_config *share,128 struct ksmbd_file *fp,129 struct lease_ctx_info *lctx,130 char *name);131#endif /* __KSMBD_OPLOCK_H */132