WebSVN – HelenOS – Diff – /branches/dd/uspace/srv/vfs/vfs.h

 /*
  * 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 VFS_VFS_H_
 #define VFS_VFS_H_
 #include <ipc/ipc.h>
-#include <libadt/list.h>
+#include <adt/list.h>
+#include <fibril_sync.h>
 #include <futex.h>
-#include <rwlock.h>
 #include <sys/types.h>
 #include <devmap.h>
 #include <bool.h>
+#include <ipc/vfs.h>
 // FIXME: according to CONFIG_DEBUG
-// #define dprintf(...) printf(__VA_ARGS__)
+// #define dprintf(...)  printf(__VA_ARGS__)
 #define dprintf(...)
-#define VFS_FIRST   IPC_FIRST_USER_METHOD
-/* Basic types. */
-typedef int16_t fs_handle_t;
-typedef uint32_t fs_index_t;
-typedef enum {
-    VFS_READ = VFS_FIRST,
-    VFS_WRITE,
-    VFS_TRUNCATE,
-    VFS_MOUNT,
-    VFS_UNMOUNT,
-    VFS_LAST_CMN,   /* keep this the last member of this enum */
-} vfs_request_cmn_t;
-typedef enum {
-    VFS_LOOKUP = VFS_LAST_CMN,
-    VFS_MOUNTED,
-    VFS_DESTROY,
-    VFS_LAST_CLNT,  /* keep this the last member of this enum */
-} vfs_request_clnt_t;
-typedef enum {
-    VFS_REGISTER = VFS_LAST_CMN,
-    VFS_OPEN,
-    VFS_CLOSE,
-    VFS_SEEK,
-    VFS_MKDIR,
-    VFS_UNLINK,
-    VFS_RENAME,
-    VFS_LAST_SRV,   /* keep this the last member of this enum */
-} vfs_request_srv_t;
-#define FS_NAME_MAXLEN  20
-/**
- * A structure like this is passed to VFS by each individual FS upon its
- * registration. It assosiates a human-readable identifier with each
- * registered FS.
- */
-typedef struct {
-    /** Unique identifier of the fs. */
-    char name[FS_NAME_MAXLEN + 1];
-} vfs_info_t;
 /**
  * A structure like this will be allocated for each registered file system.
  */
 typedef struct {
     link_t fs_link;
     vfs_info_t vfs_info;
     fs_handle_t fs_handle;
-    futex_t phone_futex;    /**< Phone serializing futex. */
+    fibril_mutex_t phone_lock;
     ipcarg_t phone;
 } fs_info_t;
 /**
  * VFS_PAIR uniquely represents a file system instance.
  */
-#define VFS_PAIR        \
+#define VFS_PAIR \
-    fs_handle_t fs_handle;  \
+    fs_handle_t fs_handle; \
     dev_handle_t dev_handle;
 /**
  * VFS_TRIPLET uniquely identifies a file system node (e.g. directory, file) but
  * doesn't contain any state. For a stateful structure, see vfs_node_t.
+ *
  * @note    fs_handle, dev_handle and index are meant to be returned in one
  *      IPC reply.
  */
 #define VFS_TRIPLET \
-    VFS_PAIR;   \
+    VFS_PAIR; \
     fs_index_t index;
 typedef struct {
     VFS_PAIR;
 } vfs_pair_t;
 typedef struct {
     VFS_TRIPLET;
 } vfs_triplet_t;
-/*
- * Lookup flags.
- */
-/**
- * No lookup flags used.
- */
-#define L_NONE      0
-/**
- * Lookup will succeed only if the object is a regular file.  If L_CREATE is
- * specified, an empty file will be created. This flag is mutually exclusive
- * with L_DIRECTORY.
- */
-#define L_FILE      1
-/**
- * Lookup wil succeed only if the object is a directory. If L_CREATE is
- * specified, an empty directory will be created. This flag is mutually
- * exclusive with L_FILE.
- */
-#define L_DIRECTORY 2
-/**
- * When used with L_CREATE, L_EXCLUSIVE will cause the lookup to fail if the
- * object already exists. L_EXCLUSIVE is implied when L_DIRECTORY is used.
- */
-#define L_EXCLUSIVE 4
-/**
- * L_CREATE is used for creating both regular files and directories.
- */
-#define L_CREATE    8
-/**
- * L_LINK is used for linking to an already existing nodes.
- */
-#define L_LINK      16
-/**
- * L_UNLINK is used to remove leaves from the file system namespace. This flag
- * cannot be passed directly by the client, but will be set by VFS during
- * VFS_UNLINK.
- */
-#define L_UNLINK    32
 typedef enum vfs_node_type {
     VFS_NODE_UNKNOWN,
     VFS_NODE_FILE,
     VFS_NODE_DIRECTORY,
 } vfs_node_type_t;
 typedef struct {
     vfs_triplet_t triplet;
     vfs_node_type_t type;
     size_t size;
     unsigned lnkcnt;
 } vfs_lookup_res_t;
 /**
  * Instances of this type represent an active, in-memory VFS node and any state
  * which may be associated with it.
  */
 typedef struct {
     VFS_TRIPLET;        /**< Identity of the node. */
     /**
      * Usage counter.  This includes, but is not limited to, all vfs_file_t
      * structures that reference this node.
      */
     unsigned refcnt;
     /** Number of names this node has in the file system namespace. */
     unsigned lnkcnt;
     link_t nh_link;     /**< Node hash-table link. */
     vfs_node_type_t type;   /**< Partial info about the node type. */
     size_t size;        /**< Cached size if the node is a file. */
     /**
      * Holding this rwlock prevents modifications of the node's contents.
      */
-    rwlock_t contents_rwlock;
+    fibril_rwlock_t contents_rwlock;
 } vfs_node_t;
 /**
  * Instances of this type represent an open file. If the file is opened by more
  * than one task, there will be a separate structure allocated for each task.
  */
 typedef struct {
     /** Serializes access to this open file. */
-    futex_t lock;
+    fibril_mutex_t lock;
     vfs_node_t *node;
     /** Number of file handles referencing this file. */
     unsigned refcnt;
     /** Append on write. */
     bool append;
     /** Current position in the file. */
     off_t pos;
 } vfs_file_t;
 extern futex_t nodes_futex;
 extern link_t fs_head;      /**< List of registered file systems. */
 extern vfs_pair_t rootfs;   /**< Root file system. */
-#define MAX_PATH_LEN        (64 * 1024)
-#define PLB_SIZE        (2 * MAX_PATH_LEN)
 /** Each instance of this type describes one path lookup in progress. */
 typedef struct {
     link_t  plb_link;   /**< Active PLB entries list link. */
     unsigned index;     /**< Index of the first character in PLB. */
     size_t len;     /**< Number of characters in this PLB entry. */
 } plb_entry_t;
 extern futex_t plb_futex;   /**< Futex protecting plb and plb_head. */
 extern uint8_t *plb;        /**< Path Lookup Buffer */
 extern link_t plb_head;     /**< List of active PLB entries. */
 #define MAX_MNTOPTS_LEN     256
 /** Holding this rwlock prevents changes in file system namespace. */
-extern rwlock_t namespace_rwlock;
+extern fibril_rwlock_t namespace_rwlock;
 extern int vfs_grab_phone(fs_handle_t);
 extern void vfs_release_phone(int);
 extern fs_handle_t fs_name_to_handle(char *, bool);
-extern int vfs_lookup_internal(char *, int, vfs_lookup_res_t *, vfs_pair_t *,
+extern int vfs_lookup_internal(char *, int, vfs_lookup_res_t *,
-    ...);
+    vfs_pair_t *, ...);
+extern int vfs_open_node_internal(vfs_lookup_res_t *);
 extern bool vfs_nodes_init(void);
 extern vfs_node_t *vfs_node_get(vfs_lookup_res_t *);
 extern void vfs_node_put(vfs_node_t *);
 #define MAX_OPEN_FILES  128
 extern bool vfs_files_init(void);
 extern vfs_file_t *vfs_file_get(int);
 extern int vfs_fd_alloc(void);
 extern int vfs_fd_free(int);
 extern void vfs_file_addref(vfs_file_t *);
 extern void vfs_file_delref(vfs_file_t *);
 extern void vfs_node_addref(vfs_node_t *);
 extern void vfs_node_delref(vfs_node_t *);
 extern void vfs_process_pending_mount(void);
 extern void vfs_register(ipc_callid_t, ipc_call_t *);
 extern void vfs_mount(ipc_callid_t, ipc_call_t *);
 extern void vfs_open(ipc_callid_t, ipc_call_t *);
+extern void vfs_open_node(ipc_callid_t, ipc_call_t *);
+extern void vfs_device(ipc_callid_t, ipc_call_t *);
+extern void vfs_sync(ipc_callid_t, ipc_call_t *);
+extern void vfs_node(ipc_callid_t, ipc_call_t *);
 extern void vfs_close(ipc_callid_t, ipc_call_t *);
 extern void vfs_read(ipc_callid_t, ipc_call_t *);
 extern void vfs_write(ipc_callid_t, ipc_call_t *);
 extern void vfs_seek(ipc_callid_t, ipc_call_t *);
 extern void vfs_truncate(ipc_callid_t, ipc_call_t *);
 extern void vfs_mkdir(ipc_callid_t, ipc_call_t *);
 extern void vfs_unlink(ipc_callid_t, ipc_call_t *);
 extern void vfs_rename(ipc_callid_t, ipc_call_t *);
 #endif
 /**
  * @}
  */

Subversion Repositories HelenOS

(root)/branches/dd/uspace/srv/vfs/vfs.h – Rev 4420 → 4537