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/*
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 * Copyright (c) 2008 Jakub Jermar
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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/** @addtogroup fs
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 * @{
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 */
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#ifndef TMPFS_TMPFS_H_
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#define TMPFS_TMPFS_H_
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#include <ipc/ipc.h>
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#include <libfs.h>
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#include <atomic.h>
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#include <sys/types.h>
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#include <bool.h>
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#include <libadt/hash_table.h>
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#ifndef dprintf
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#define dprintf(...)    printf(__VA_ARGS__)
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#endif
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#define TMPFS_NODE(node)    ((node) ? (tmpfs_node_t *)(node)->data : NULL)
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#define FS_NODE(node)       ((node) ? (node)->bp : NULL)
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typedef enum {
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    TMPFS_NONE,
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    TMPFS_FILE,
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    TMPFS_DIRECTORY
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} tmpfs_dentry_type_t;
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/* forward declaration */
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struct tmpfs_node;
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typedef struct tmpfs_dentry {
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    link_t link;        /**< Linkage for the list of siblings. */
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    struct tmpfs_node *node;/**< Back pointer to TMPFS node. */
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    char *name;     /**< Name of dentry. */
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} tmpfs_dentry_t;
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typedef struct tmpfs_node {
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    fs_node_t *bp;      /**< Back pointer to the FS node. */
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    fs_index_t index;   /**< TMPFS node index. */
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    dev_handle_t dev_handle;/**< Device handle. */
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    link_t nh_link;     /**< Nodes hash table link. */
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    tmpfs_dentry_type_t type;
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    unsigned lnkcnt;    /**< Link count. */
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    size_t size;        /**< File size if type is TMPFS_FILE. */
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    void *data;     /**< File content's if type is TMPFS_FILE. */
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    link_t cs_head;     /**< Head of child's siblings list. */
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} tmpfs_node_t;
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extern fs_reg_t tmpfs_reg;
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extern libfs_ops_t tmpfs_libfs_ops;
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extern bool tmpfs_init(void);
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extern void tmpfs_mounted(ipc_callid_t, ipc_call_t *);
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extern void tmpfs_mount(ipc_callid_t, ipc_call_t *);
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extern void tmpfs_lookup(ipc_callid_t, ipc_call_t *);
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extern void tmpfs_read(ipc_callid_t, ipc_call_t *);
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extern void tmpfs_write(ipc_callid_t, ipc_call_t *);
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extern void tmpfs_truncate(ipc_callid_t, ipc_call_t *);
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extern void tmpfs_destroy(ipc_callid_t, ipc_call_t *);
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extern bool tmpfs_restore(dev_handle_t);
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#endif
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/**
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 * @}
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 */