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Rev 3022 Rev 4055
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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 <rwlock.h>
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#include <sys/types.h>
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#include <sys/types.h>
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#include <bool.h>
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#include <bool.h>
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- 
 
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// FIXME: according to CONFIG_DEBUG
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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   IPC_FIRST_USER_METHOD
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#define dprintf(...)
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#define IPC_METHOD_TO_VFS_OP(m) ((m) - VFS_FIRST)  
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#define VFS_FIRST   IPC_FIRST_USER_METHOD
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/* Basic types. */
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/* Basic types. */
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typedef int16_t fs_handle_t;
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typedef int16_t fs_handle_t;
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typedef int16_t dev_handle_t;
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typedef int16_t dev_handle_t;
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typedef uint32_t fs_index_t;
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typedef uint32_t fs_index_t;
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    VFS_LAST_CMN,   /* keep this the last member of this enum */
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    VFS_LAST_CMN,   /* keep this the last member of this enum */
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} vfs_request_cmn_t;
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} vfs_request_cmn_t;
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typedef enum {
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typedef enum {
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    VFS_LOOKUP = VFS_LAST_CMN,
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    VFS_LOOKUP = VFS_LAST_CMN,
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    VFS_MOUNTED,
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    VFS_DESTROY,
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    VFS_DESTROY,
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    VFS_LAST_CLNT,  /* keep this the last member of this enum */
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    VFS_LAST_CLNT,  /* keep this the last member of this enum */
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} vfs_request_clnt_t;
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} vfs_request_clnt_t;
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typedef enum {
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typedef enum {
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    VFS_UNLINK,
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    VFS_UNLINK,
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    VFS_RENAME,
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    VFS_RENAME,
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    VFS_LAST_SRV,   /* keep this the last member of this enum */
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    VFS_LAST_SRV,   /* keep this the last member of this enum */
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} vfs_request_srv_t;
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} vfs_request_srv_t;
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 - 
 
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/**
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 * An instance of this structure is associated with a particular FS operation.
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 * It tells VFS if the FS supports the operation or maybe if a default one
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 * should be used.
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 */
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typedef enum {
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    VFS_OP_NULL = 0,
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    VFS_OP_DEFAULT,
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    VFS_OP_DEFINED
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} vfs_op_t;
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#define FS_NAME_MAXLEN  20
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#define FS_NAME_MAXLEN  20
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/**
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/**
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 * A structure like this is passed to VFS by each individual FS upon its
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 * A structure like this is passed to VFS by each individual FS upon its
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 * registration. It assosiates a human-readable identifier with each
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 * registration. It assosiates a human-readable identifier with each
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 * registered FS. More importantly, through this structure, the FS announces
 - 
 
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 * what operations it supports.
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 * registered FS.
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 */
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 */
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typedef struct {
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typedef struct {
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    /** Unique identifier of the fs. */
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    /** Unique identifier of the fs. */
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    char name[FS_NAME_MAXLEN + 1];
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    char name[FS_NAME_MAXLEN + 1];
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    /** Operations. */
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    vfs_op_t ops[VFS_LAST_CLNT - VFS_FIRST];
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} vfs_info_t;
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} vfs_info_t;
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/**
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/**
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 * A structure like this will be allocated for each registered file system.
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 * A structure like this will be allocated for each registered file system.
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 */
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 */
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 * L_PARENT performs a lookup but returns the triplet of the parent node.
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 * L_PARENT performs a lookup but returns the triplet of the parent node.
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 * This flag may not be combined with any other lookup flag.
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 * This flag may not be combined with any other lookup flag.
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 */
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 */
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#define L_PARENT    64 
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#define L_PARENT    64 
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typedef enum vfs_node_type {
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    VFS_NODE_UNKNOWN,
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    VFS_NODE_FILE,
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    VFS_NODE_DIRECTORY,
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} vfs_node_type_t;
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typedef struct {
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typedef struct {
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    vfs_triplet_t triplet;
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    vfs_triplet_t triplet;
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    vfs_node_type_t type;
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    size_t size;
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    size_t size;
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    unsigned lnkcnt;
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    unsigned lnkcnt;
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} vfs_lookup_res_t;
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} vfs_lookup_res_t;
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/**
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/**
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    /** Number of names this node has in the file system namespace. */
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    /** Number of names this node has in the file system namespace. */
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    unsigned lnkcnt;
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    unsigned lnkcnt;
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    link_t nh_link;     /**< Node hash-table link. */
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    link_t nh_link;     /**< Node hash-table link. */
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    vfs_node_type_t type;   /**< Partial info about the node type. */
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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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extern futex_t nodes_futex;
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extern futex_t nodes_futex;
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extern link_t fs_head;      /**< List of registered file systems. */
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extern link_t fs_head;      /**< List of registered file systems. */
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extern vfs_triplet_t rootfs;    /**< Root node of the root file system. */
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extern vfs_pair_t rootfs;   /**< Root file system. */
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#define MAX_PATH_LEN        (64 * 1024)
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#define MAX_PATH_LEN        (64 * 1024)
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#define PLB_SIZE        (2 * MAX_PATH_LEN)
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#define PLB_SIZE        (2 * MAX_PATH_LEN)
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#define MAX_OPEN_FILES  128
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#define MAX_OPEN_FILES  128
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278 
extern bool vfs_files_init(void);
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extern bool vfs_files_init(void);
279 
extern vfs_file_t *vfs_file_get(int);
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extern vfs_file_t *vfs_file_get(int);
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extern int vfs_fd_alloc(void);
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extern int vfs_fd_alloc(void);
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extern void vfs_fd_free(int);
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extern int vfs_fd_free(int);
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extern void vfs_file_addref(vfs_file_t *);
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extern void vfs_file_addref(vfs_file_t *);
284 
extern void vfs_file_delref(vfs_file_t *);
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extern void vfs_file_delref(vfs_file_t *);
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 281 
 
286 
extern void vfs_node_addref(vfs_node_t *);
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extern void vfs_node_addref(vfs_node_t *);
287 
extern void vfs_node_delref(vfs_node_t *);
 283 
extern void vfs_node_delref(vfs_node_t *);
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- 
 
 285 
extern void vfs_process_pending_mount(void);
289 
extern void vfs_register(ipc_callid_t, ipc_call_t *);
 286 
extern void vfs_register(ipc_callid_t, ipc_call_t *);
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extern void vfs_mount(ipc_callid_t, ipc_call_t *);
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extern void vfs_mount(ipc_callid_t, ipc_call_t *);
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extern void vfs_open(ipc_callid_t, ipc_call_t *);
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extern void vfs_open(ipc_callid_t, ipc_call_t *);
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extern void vfs_close(ipc_callid_t, ipc_call_t *);
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extern void vfs_close(ipc_callid_t, ipc_call_t *);
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extern void vfs_read(ipc_callid_t, ipc_call_t *);
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extern void vfs_read(ipc_callid_t, ipc_call_t *);