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/*

 * Copyright (c) 2008 Jakub Jermar

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 * - Redistributions of source code must retain the above copyright

 *   notice, this list of conditions and the following disclaimer.

 * - Redistributions in binary form must reproduce the above copyright

 *   notice, this list of conditions and the following disclaimer in the

 *   documentation and/or other materials provided with the distribution.

 * - The name of the author may not be used to endorse or promote products

 *   derived from this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR

 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES

 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.

 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,

 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

/** @addtogroup fs

 * @{

 */ 

#ifndef TMPFS_TMPFS_H_

#define TMPFS_TMPFS_H_

#include <ipc/ipc.h>

#include <libfs.h>

#include <atomic.h>

#include <sys/types.h>

#include <bool.h>

#include <libadt/hash_table.h>

#ifndef dprintf

#define dprintf(...)	printf(__VA_ARGS__)

#endif

#define TMPFS_NODE(node)	((node) ? (tmpfs_node_t *)(node)->data : NULL)

#define FS_NODE(node)		((node) ? (node)->bp : NULL)

typedef enum {

	TMPFS_NONE,

	TMPFS_FILE,

	TMPFS_DIRECTORY

} tmpfs_dentry_type_t;

/* forward declaration */

struct tmpfs_node;

typedef struct tmpfs_dentry {

	link_t link;		/**< Linkage for the list of siblings. */

	struct tmpfs_node *node;/**< Back pointer to TMPFS node. */

	char *name;		/**< Name of dentry. */

} tmpfs_dentry_t;

typedef struct tmpfs_node {

	fs_node_t *bp;		/**< Back pointer to the FS node. */

	fs_index_t index;	/**< TMPFS node index. */

	dev_handle_t dev_handle;/**< Device handle. */

	link_t nh_link;		/**< Nodes hash table link. */

	tmpfs_dentry_type_t type;

	unsigned lnkcnt;	/**< Link count. */

	size_t size;		/**< File size if type is TMPFS_FILE. */

	void *data;		/**< File content's if type is TMPFS_FILE. */

	link_t cs_head;		/**< Head of child's siblings list. */

} tmpfs_node_t;

extern fs_reg_t tmpfs_reg;

extern libfs_ops_t tmpfs_libfs_ops;

extern bool tmpfs_init(void);

extern void tmpfs_mounted(ipc_callid_t, ipc_call_t *);

extern void tmpfs_mount(ipc_callid_t, ipc_call_t *);

extern void tmpfs_lookup(ipc_callid_t, ipc_call_t *);

extern void tmpfs_read(ipc_callid_t, ipc_call_t *);

extern void tmpfs_write(ipc_callid_t, ipc_call_t *);

extern void tmpfs_truncate(ipc_callid_t, ipc_call_t *);

extern void tmpfs_destroy(ipc_callid_t, ipc_call_t *);

extern bool tmpfs_restore(dev_handle_t);

#endif

/**

 * @}

 */