233 lines
6.1 KiB
C
233 lines
6.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Copyright (C) 2018 Samsung Electronics Co., Ltd.
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*/
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#ifndef __KSMBD_CONNECTION_H__
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#define __KSMBD_CONNECTION_H__
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#include <linux/list.h>
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#include <linux/ip.h>
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#include <net/sock.h>
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#include <net/tcp.h>
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#include <net/inet_connection_sock.h>
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#include <net/request_sock.h>
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#include <linux/kthread.h>
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#include <linux/nls.h>
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#include <linux/unicode.h>
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#include "smb_common.h"
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#include "ksmbd_work.h"
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#define KSMBD_SOCKET_BACKLOG 16
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enum {
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KSMBD_SESS_NEW = 0,
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KSMBD_SESS_GOOD,
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KSMBD_SESS_EXITING,
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KSMBD_SESS_NEED_RECONNECT,
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KSMBD_SESS_NEED_NEGOTIATE,
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KSMBD_SESS_RELEASING
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};
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struct ksmbd_stats {
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atomic_t open_files_count;
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atomic64_t request_served;
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};
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struct ksmbd_transport;
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struct ksmbd_conn {
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struct smb_version_values *vals;
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struct smb_version_ops *ops;
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struct smb_version_cmds *cmds;
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unsigned int max_cmds;
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struct mutex srv_mutex;
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int status;
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unsigned int cli_cap;
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char *request_buf;
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struct ksmbd_transport *transport;
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struct nls_table *local_nls;
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struct unicode_map *um;
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struct list_head conns_list;
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struct rw_semaphore session_lock;
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/* smb session 1 per user */
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struct xarray sessions;
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unsigned long last_active;
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/* How many request are running currently */
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atomic_t req_running;
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/* References which are made for this Server object*/
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atomic_t r_count;
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unsigned int total_credits;
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unsigned int outstanding_credits;
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spinlock_t credits_lock;
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wait_queue_head_t req_running_q;
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wait_queue_head_t r_count_q;
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/* Lock to protect requests list*/
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spinlock_t request_lock;
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struct list_head requests;
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struct list_head async_requests;
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int connection_type;
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struct ksmbd_stats stats;
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char ClientGUID[SMB2_CLIENT_GUID_SIZE];
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struct ntlmssp_auth ntlmssp;
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spinlock_t llist_lock;
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struct list_head lock_list;
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struct preauth_integrity_info *preauth_info;
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bool need_neg;
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unsigned int auth_mechs;
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unsigned int preferred_auth_mech;
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bool sign;
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bool use_spnego:1;
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__u16 cli_sec_mode;
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__u16 srv_sec_mode;
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/* dialect index that server chose */
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__u16 dialect;
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char *mechToken;
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unsigned int mechTokenLen;
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struct ksmbd_conn_ops *conn_ops;
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/* Preauth Session Table */
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struct list_head preauth_sess_table;
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struct sockaddr_storage peer_addr;
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/* Identifier for async message */
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struct ida async_ida;
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__le16 cipher_type;
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__le16 compress_algorithm;
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bool posix_ext_supported;
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bool signing_negotiated;
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__le16 signing_algorithm;
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bool binding;
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};
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struct ksmbd_conn_ops {
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int (*process_fn)(struct ksmbd_conn *conn);
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int (*terminate_fn)(struct ksmbd_conn *conn);
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};
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struct ksmbd_transport_ops {
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int (*prepare)(struct ksmbd_transport *t);
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void (*disconnect)(struct ksmbd_transport *t);
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void (*shutdown)(struct ksmbd_transport *t);
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int (*read)(struct ksmbd_transport *t, char *buf,
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unsigned int size, int max_retries);
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int (*writev)(struct ksmbd_transport *t, struct kvec *iovs, int niov,
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int size, bool need_invalidate_rkey,
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unsigned int remote_key);
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int (*rdma_read)(struct ksmbd_transport *t,
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void *buf, unsigned int len,
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struct smb2_buffer_desc_v1 *desc,
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unsigned int desc_len);
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int (*rdma_write)(struct ksmbd_transport *t,
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void *buf, unsigned int len,
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struct smb2_buffer_desc_v1 *desc,
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unsigned int desc_len);
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};
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struct ksmbd_transport {
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struct ksmbd_conn *conn;
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struct ksmbd_transport_ops *ops;
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};
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#define KSMBD_TCP_RECV_TIMEOUT (7 * HZ)
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#define KSMBD_TCP_SEND_TIMEOUT (5 * HZ)
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#define KSMBD_TCP_PEER_SOCKADDR(c) ((struct sockaddr *)&((c)->peer_addr))
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extern struct list_head conn_list;
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extern struct rw_semaphore conn_list_lock;
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bool ksmbd_conn_alive(struct ksmbd_conn *conn);
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void ksmbd_conn_wait_idle(struct ksmbd_conn *conn, u64 sess_id);
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struct ksmbd_conn *ksmbd_conn_alloc(void);
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void ksmbd_conn_free(struct ksmbd_conn *conn);
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bool ksmbd_conn_lookup_dialect(struct ksmbd_conn *c);
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int ksmbd_conn_write(struct ksmbd_work *work);
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int ksmbd_conn_rdma_read(struct ksmbd_conn *conn,
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void *buf, unsigned int buflen,
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struct smb2_buffer_desc_v1 *desc,
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unsigned int desc_len);
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int ksmbd_conn_rdma_write(struct ksmbd_conn *conn,
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void *buf, unsigned int buflen,
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struct smb2_buffer_desc_v1 *desc,
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unsigned int desc_len);
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void ksmbd_conn_enqueue_request(struct ksmbd_work *work);
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void ksmbd_conn_try_dequeue_request(struct ksmbd_work *work);
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void ksmbd_conn_init_server_callbacks(struct ksmbd_conn_ops *ops);
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int ksmbd_conn_handler_loop(void *p);
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int ksmbd_conn_transport_init(void);
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void ksmbd_conn_transport_destroy(void);
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void ksmbd_conn_lock(struct ksmbd_conn *conn);
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void ksmbd_conn_unlock(struct ksmbd_conn *conn);
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/*
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* WARNING
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*
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* This is a hack. We will move status to a proper place once we land
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* a multi-sessions support.
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*/
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static inline bool ksmbd_conn_good(struct ksmbd_conn *conn)
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{
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return READ_ONCE(conn->status) == KSMBD_SESS_GOOD;
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}
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static inline bool ksmbd_conn_need_negotiate(struct ksmbd_conn *conn)
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{
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return READ_ONCE(conn->status) == KSMBD_SESS_NEED_NEGOTIATE;
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}
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static inline bool ksmbd_conn_need_reconnect(struct ksmbd_conn *conn)
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{
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return READ_ONCE(conn->status) == KSMBD_SESS_NEED_RECONNECT;
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}
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static inline bool ksmbd_conn_exiting(struct ksmbd_conn *conn)
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{
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return READ_ONCE(conn->status) == KSMBD_SESS_EXITING;
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}
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static inline bool ksmbd_conn_releasing(struct ksmbd_conn *conn)
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{
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return READ_ONCE(conn->status) == KSMBD_SESS_RELEASING;
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}
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static inline void ksmbd_conn_set_new(struct ksmbd_conn *conn)
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{
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WRITE_ONCE(conn->status, KSMBD_SESS_NEW);
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}
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static inline void ksmbd_conn_set_good(struct ksmbd_conn *conn)
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{
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WRITE_ONCE(conn->status, KSMBD_SESS_GOOD);
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}
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static inline void ksmbd_conn_set_need_negotiate(struct ksmbd_conn *conn)
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{
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WRITE_ONCE(conn->status, KSMBD_SESS_NEED_NEGOTIATE);
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}
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static inline void ksmbd_conn_set_need_reconnect(struct ksmbd_conn *conn)
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{
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WRITE_ONCE(conn->status, KSMBD_SESS_NEED_RECONNECT);
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}
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static inline void ksmbd_conn_set_exiting(struct ksmbd_conn *conn)
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{
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WRITE_ONCE(conn->status, KSMBD_SESS_EXITING);
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}
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static inline void ksmbd_conn_set_releasing(struct ksmbd_conn *conn)
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{
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WRITE_ONCE(conn->status, KSMBD_SESS_RELEASING);
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}
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void ksmbd_all_conn_set_status(u64 sess_id, u32 status);
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#endif /* __CONNECTION_H__ */
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