linux_dsm_epyc7002/include/linux/smb_fs_sb.h

/*
 *  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

#include <linux/types.h>
#include <linux/backing-dev.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;
	struct pid *conn_pid;
	struct smb_conn_opt opt;
	wait_queue_head_t conn_wq;
	int conn_complete;
	struct semaphore sem;

	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;

	struct backing_dev_info bdi;
};

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