1/* SPDX-License-Identifier: GPL-2.0 */ 2/* 3 * ncp_fs_sb.h 4 * 5 * Copyright (C) 1995, 1996 by Volker Lendecke 6 * 7 */ 8 9#ifndef _NCP_FS_SB 10#define _NCP_FS_SB 11 12#include <linux/types.h> 13#include <linux/ncp_mount.h> 14#include <linux/net.h> 15#include <linux/mutex.h> 16#include <linux/backing-dev.h> 17#include <linux/workqueue.h> 18 19#define NCP_DEFAULT_OPTIONS 0 /* 2 for packet signatures */ 20 21struct sock; 22 23struct ncp_mount_data_kernel { 24 unsigned long flags; /* NCP_MOUNT_* flags */ 25 unsigned int int_flags; /* internal flags */ 26#define NCP_IMOUNT_LOGGEDIN_POSSIBLE 0x0001 27 kuid_t mounted_uid; /* Who may umount() this filesystem? */ 28 struct pid *wdog_pid; /* Who cares for our watchdog packets? */ 29 unsigned int ncp_fd; /* The socket to the ncp port */ 30 unsigned int time_out; /* How long should I wait after 31 sending a NCP request? */ 32 unsigned int retry_count; /* And how often should I retry? */ 33 unsigned char mounted_vol[NCP_VOLNAME_LEN + 1]; 34 kuid_t uid; 35 kgid_t gid; 36 umode_t file_mode; 37 umode_t dir_mode; 38 int info_fd; 39}; 40 41struct ncp_server { 42 struct rcu_head rcu; 43 struct ncp_mount_data_kernel m; /* Nearly all of the mount data is of 44 interest for us later, so we store 45 it completely. */ 46 47 __u8 name_space[NCP_NUMBER_OF_VOLUMES + 2]; 48 49 struct socket *ncp_sock;/* ncp socket */ 50 struct socket *info_sock; 51 52 u8 sequence; 53 u8 task; 54 u16 connection; /* Remote connection number */ 55 56 u8 completion; /* Status message from server */ 57 u8 conn_status; /* Bit 4 = 1 ==> Server going down, no 58 requests allowed anymore. 59 Bit 0 = 1 ==> Server is down. */ 60 61 int buffer_size; /* Negotiated bufsize */ 62 63 int reply_size; /* Size of last reply */ 64 65 int packet_size; 66 unsigned char *packet; /* Here we prepare requests and 67 receive replies */ 68 unsigned char *txbuf; /* Storage for current request */ 69 unsigned char *rxbuf; /* Storage for reply to current request */ 70 71 int lock; /* To prevent mismatch in protocols. */ 72 struct mutex mutex; 73 74 int current_size; /* for packet preparation */ 75 int has_subfunction; 76 int ncp_reply_size; 77 78 int root_setuped; 79 struct mutex root_setup_lock; 80 81 /* info for packet signing */ 82 int sign_wanted; /* 1=Server needs signed packets */ 83 int sign_active; /* 0=don't do signing, 1=do */ 84 char sign_root[8]; /* generated from password and encr. key */ 85 char sign_last[16]; 86 87 /* Authentication info: NDS or BINDERY, username */ 88 struct { 89 int auth_type; 90 size_t object_name_len; 91 void* object_name; 92 int object_type; 93 } auth; 94 /* Password info */ 95 struct { 96 size_t len; 97 void* data; 98 } priv; 99 struct rw_semaphore auth_rwsem; 100 101 /* nls info: codepage for volume and charset for I/O */ 102 struct nls_table *nls_vol; 103 struct nls_table *nls_io; 104 105 /* maximum age in jiffies */ 106 atomic_t dentry_ttl; 107 108 /* miscellaneous */ 109 unsigned int flags; 110 111 spinlock_t requests_lock; /* Lock accesses to tx.requests, tx.creq and rcv.creq when STREAM mode */ 112 113 void (*data_ready)(struct sock* sk); 114 void (*error_report)(struct sock* sk); 115 void (*write_space)(struct sock* sk); /* STREAM mode only */ 116 struct { 117 struct work_struct tq; /* STREAM/DGRAM: data/error ready */ 118 struct ncp_request_reply* creq; /* STREAM/DGRAM: awaiting reply from this request */ 119 struct mutex creq_mutex; /* DGRAM only: lock accesses to rcv.creq */ 120 121 unsigned int state; /* STREAM only: receiver state */ 122 struct { 123 __u32 magic __packed; 124 __u32 len __packed; 125 __u16 type __packed; 126 __u16 p1 __packed; 127 __u16 p2 __packed; 128 __u16 p3 __packed; 129 __u16 type2 __packed; 130 } buf; /* STREAM only: temporary buffer */ 131 unsigned char* ptr; /* STREAM only: pointer to data */ 132 size_t len; /* STREAM only: length of data to receive */ 133 } rcv; 134 struct { 135 struct list_head requests; /* STREAM only: queued requests */ 136 struct work_struct tq; /* STREAM only: transmitter ready */ 137 struct ncp_request_reply* creq; /* STREAM only: currently transmitted entry */ 138 } tx; 139 struct timer_list timeout_tm; /* DGRAM only: timeout timer */ 140 struct work_struct timeout_tq; /* DGRAM only: associated queue, we run timers from process context */ 141 int timeout_last; /* DGRAM only: current timeout length */ 142 int timeout_retries; /* DGRAM only: retries left */ 143 struct { 144 size_t len; 145 __u8 data[128]; 146 } unexpected_packet; 147}; 148 149extern void ncp_tcp_rcv_proc(struct work_struct *work); 150extern void ncp_tcp_tx_proc(struct work_struct *work); 151extern void ncpdgram_rcv_proc(struct work_struct *work); 152extern void ncpdgram_timeout_proc(struct work_struct *work); 153extern void ncpdgram_timeout_call(struct timer_list *t); 154extern void ncp_tcp_data_ready(struct sock* sk); 155extern void ncp_tcp_write_space(struct sock* sk); 156extern void ncp_tcp_error_report(struct sock* sk); 157 158#define NCP_FLAG_UTF8 1 159 160#define NCP_CLR_FLAG(server, flag) ((server)->flags &= ~(flag)) 161#define NCP_SET_FLAG(server, flag) ((server)->flags |= (flag)) 162#define NCP_IS_FLAG(server, flag) ((server)->flags & (flag)) 163 164static inline int ncp_conn_valid(struct ncp_server *server) 165{ 166 return ((server->conn_status & 0x11) == 0); 167} 168 169static inline void ncp_invalidate_conn(struct ncp_server *server) 170{ 171 server->conn_status |= 0x01; 172} 173 174#endif 175