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