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/*
 *  smb_fs_sb.h
 *
 *  Copyright (C) 1995 by Paal-Kr. Engstad and Volker Lendecke
 *  Copyright (C) 1997 by Volker Lendecke
 *
 */

#ifndef _SMB_FS_SB
#define _SMB_FS_SB

#ifdef __KERNEL__

#include <linux/types.h>
#include <linux/smb.h>

/*
 * Upper limit on the total number of active smb_request structs.
 */
#define MAX_REQUEST_HARD       256

enum smb_receive_state {
        SMB_RECV_START,         /* No data read, looking for length + sig */
        SMB_RECV_HEADER,        /* Reading the header data */
        SMB_RECV_HCOMPLETE,     /* Done with the header */
        SMB_RECV_PARAM,         /* Reading parameter words */
        SMB_RECV_DATA,          /* Reading data bytes */
        SMB_RECV_END,           /* End of request */
        SMB_RECV_DROP,          /* Dropping this SMB */
        SMB_RECV_REQUEST,       /* Received a request and not a reply */
};

/* structure access macros */
#define server_from_inode(inode) SMB_SB((inode)->i_sb)
#define server_from_dentry(dentry) SMB_SB((dentry)->d_sb)
#define SB_of(server) ((server)->super_block)

struct smb_sb_info {
        /* List of all smbfs superblocks */
        struct list_head entry;

        enum smb_conn_state state;
        struct file * sock_file;
        int conn_error;
        enum smb_receive_state rstate;

        atomic_t nr_requests;
        struct list_head xmitq;
        struct list_head recvq;
        u16 mid;

        struct smb_mount_data_kernel *mnt;

        /* Connections are counted. Each time a new socket arrives,
         * generation is incremented.
         */
        unsigned int generation;
        pid_t conn_pid;
        struct smb_conn_opt opt;

        struct semaphore sem;

        unsigned short     rcls; /* The error codes we received */
        unsigned short     err;

        unsigned char      header[SMB_HEADER_LEN + 20*2 + 2];
        u32                header_len;
        u32                smb_len;
        u32                smb_read;

        /* We use our own data_ready callback, but need the original one */
        void *data_ready;

        /* nls pointers for codepage conversions */
        struct nls_table *remote_nls;
        struct nls_table *local_nls;

        struct smb_ops *ops;

        struct super_block *super_block;
};

static inline int
smb_lock_server_interruptible(struct smb_sb_info *server)
{
        return down_interruptible(&(server->sem));
}

static inline void
smb_lock_server(struct smb_sb_info *server)
{
        down(&(server->sem));
}

static inline void
smb_unlock_server(struct smb_sb_info *server)
{
        up(&(server->sem));
}

#endif /* __KERNEL__ */

#endif