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#ifndef VFS_VFS_H_
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#ifndef VFS_VFS_H_
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#define VFS_VFS_H_
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#define VFS_VFS_H_
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#include <ipc/ipc.h>
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#include <ipc/ipc.h>
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#include <adt/list.h>
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#include <adt/list.h>
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#include <fibril_sync.h>
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#include <futex.h>
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#include <futex.h>
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#include <rwlock.h>
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#include <sys/types.h>
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#include <sys/types.h>
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#include <devmap.h>
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#include <devmap.h>
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#include <bool.h>
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#include <bool.h>
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#include <ipc/vfs.h>
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#include <ipc/vfs.h>
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 */
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 */
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typedef struct {
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typedef struct {
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    link_t fs_link;
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    link_t fs_link;
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    vfs_info_t vfs_info;
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    vfs_info_t vfs_info;
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    fs_handle_t fs_handle;
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    fs_handle_t fs_handle;
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    futex_t phone_futex;    /**< Phone serializing futex. */
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    fibril_mutex_t phone_lock;
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    ipcarg_t phone;
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    ipcarg_t phone;
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} fs_info_t;
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} fs_info_t;
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/**
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/**
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 * VFS_PAIR uniquely represents a file system instance.
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 * VFS_PAIR uniquely represents a file system instance.
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    size_t size;        /**< Cached size if the node is a file. */
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    size_t size;        /**< Cached size if the node is a file. */
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    /**
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    /**
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     * Holding this rwlock prevents modifications of the node's contents.
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     * Holding this rwlock prevents modifications of the node's contents.
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     */
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     */
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    rwlock_t contents_rwlock;
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    fibril_rwlock_t contents_rwlock;
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} vfs_node_t;
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} vfs_node_t;
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/**
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/**
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 * Instances of this type represent an open file. If the file is opened by more
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 * Instances of this type represent an open file. If the file is opened by more
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 * than one task, there will be a separate structure allocated for each task.
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 * than one task, there will be a separate structure allocated for each task.
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 */
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 */
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typedef struct {
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typedef struct {
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    /** Serializes access to this open file. */
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    /** Serializes access to this open file. */
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    futex_t lock;
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    fibril_mutex_t lock;
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    vfs_node_t *node;
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    vfs_node_t *node;
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    /** Number of file handles referencing this file. */
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    /** Number of file handles referencing this file. */
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    unsigned refcnt;
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    unsigned refcnt;
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extern link_t plb_head;     /**< List of active PLB entries. */
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extern link_t plb_head;     /**< List of active PLB entries. */
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#define MAX_MNTOPTS_LEN     256
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#define MAX_MNTOPTS_LEN     256
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/** Holding this rwlock prevents changes in file system namespace. */
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/** Holding this rwlock prevents changes in file system namespace. */
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extern rwlock_t namespace_rwlock;
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extern fibril_rwlock_t namespace_rwlock;
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extern int vfs_grab_phone(fs_handle_t);
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extern int vfs_grab_phone(fs_handle_t);
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extern void vfs_release_phone(int);
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extern void vfs_release_phone(int);
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extern fs_handle_t fs_name_to_handle(char *, bool);
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extern fs_handle_t fs_name_to_handle(char *, bool);