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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 <libadt/list.h>
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#include <libadt/list.h>
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#include <atomic.h>
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#include <types.h>
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#define dprintf(...)    printf(__VA_ARGS__)
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#define dprintf(...)    printf(__VA_ARGS__)
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#define VFS_FIRST   FIRST_USER_METHOD
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#define VFS_FIRST   FIRST_USER_METHOD
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#define IPC_METHOD_TO_VFS_OP(m) ((m) - VFS_FIRST)  
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#define IPC_METHOD_TO_VFS_OP(m) ((m) - VFS_FIRST)  
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typedef int64_t off_t;
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typedef enum {
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typedef enum {
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    VFS_REGISTER = VFS_FIRST,
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    VFS_REGISTER = VFS_FIRST,
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    VFS_MOUNT,
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    VFS_MOUNT,
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    VFS_UNMOUNT,
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    VFS_UNMOUNT,
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    VFS_LOOKUP,
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    VFS_LOOKUP,
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    /** Operations. */
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    /** Operations. */
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    vfs_op_t ops[VFS_LAST - VFS_FIRST];
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    vfs_op_t ops[VFS_LAST - VFS_FIRST];
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} vfs_info_t;
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} vfs_info_t;
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/**
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 * A structure like this will be allocated for each registered file system.
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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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    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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 * Instances of this type represent a file system node (e.g. directory, file).
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 * They are abstracted away from any file system implementation and contain just
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 * enough bits to uniquely identify the object in its file system instance.
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 *
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 * @note    fs_handle, dev_handle and index are meant to be returned in one
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 *      IPC reply.
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 */
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typedef struct {
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    int fs_handle;      /**< Global file system ID. */
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    int dev_handle;     /**< Global mount device devno. */
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    uint64_t index;     /**< Index of the node on its file system. */
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} vfs_node_t;
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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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 * than one task, there will be a separate structure allocated for each task.
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 */
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typedef struct {
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    vfs_node_t *node;
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    /** Number of file handles referencing this file. */
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    atomic_t refcnt;
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    /** Current position in the file. */
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    off_t pos;
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} vfs_file_t;
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extern link_t fs_head;
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extern link_t fs_head;
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extern void vfs_register(ipc_callid_t rid, ipc_call_t *request);
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extern void vfs_register(ipc_callid_t rid, ipc_call_t *request);
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#endif
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#endif