native_client_sdk/src/libraries/nacl_io/fusefs/fuse_fs.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef LIBRARIES_NACL_IO_FUSEFS_FUSE_FS_H_
   6 #define LIBRARIES_NACL_IO_FUSEFS_FUSE_FS_H_
   7
   8 #include <map>
   9
  10 #include "nacl_io/filesystem.h"
  11 #include "nacl_io/fuse.h"
  12 #include "nacl_io/node.h"
  13
  14 namespace nacl_io {
  15
  16 class FuseFs : public Filesystem {
  17  protected:
  18   FuseFs();
  19
  20   virtual Error Init(const FsInitArgs& args);
  21   virtual void Destroy();
  22
  23  public:
  24   virtual Error OpenWithMode(const Path& path, int open_flags, mode_t mode,
  25                              ScopedNode* out_node);
  26   virtual Error Unlink(const Path& path);
  27   virtual Error Mkdir(const Path& path, int perm);
  28   virtual Error Rmdir(const Path& path);
  29   virtual Error Remove(const Path& path);
  30   virtual Error Rename(const Path& path, const Path& newpath);
  31
  32  private:
  33   struct fuse_operations* fuse_ops_;
  34   void* fuse_user_data_;
  35
  36   friend class FuseFsNode;
  37   friend class FuseFsFactory;
  38   DISALLOW_COPY_AND_ASSIGN(FuseFs);
  39 };
  40
  41 class FuseFsNode : public Node {
  42  protected:
  43   FuseFsNode(Filesystem* filesystem,
  44              struct fuse_operations* fuse_ops,
  45              struct fuse_file_info& info,
  46              const std::string& path);
  47
  48  public:
  49   virtual bool CanOpen(int open_flags);
  50   virtual Error GetStat(struct stat* stat);
  51   virtual Error VIoctl(int request, va_list args);
  52   virtual Error Tcflush(int queue_selector);
  53   virtual Error Tcgetattr(struct termios* termios_p);
  54   virtual Error Tcsetattr(int optional_actions,
  55                           const struct termios* termios_p);
  56   virtual Error GetSize(off_t* out_size);
  57   virtual Error Futimens(const struct timespec times[2]);
  58   virtual Error Fchmod(mode_t mode);
  59
  60  protected:
  61   struct fuse_operations* fuse_ops_;
  62   struct fuse_file_info info_;
  63   std::string path_;
  64 };
  65
  66 class FileFuseFsNode : public FuseFsNode {
  67  public:
  68   FileFuseFsNode(Filesystem* filesystem,
  69                  struct fuse_operations* fuse_ops,
  70                  struct fuse_file_info& info,
  71                  const std::string& path);
  72
  73  protected:
  74   virtual void Destroy();
  75
  76  public:
  77   virtual Error FSync();
  78   virtual Error FTruncate(off_t length);
  79   virtual Error Read(const HandleAttr& attr,
  80                      void* buf,
  81                      size_t count,
  82                      int* out_bytes);
  83   virtual Error Write(const HandleAttr& attr,
  84                       const void* buf,
  85                       size_t count,
  86                       int* out_bytes);
  87
  88  private:
  89   friend class FuseFs;
  90   DISALLOW_COPY_AND_ASSIGN(FileFuseFsNode);
  91 };
  92
  93 class DirFuseFsNode : public FuseFsNode {
  94  public:
  95   DirFuseFsNode(Filesystem* filesystem,
  96                 struct fuse_operations* fuse_ops,
  97                 struct fuse_file_info& info,
  98                 const std::string& path);
  99
 100  protected:
 101   virtual void Destroy();
 102
 103  public:
 104   virtual Error FSync();
 105   virtual Error GetDents(size_t offs,
 106                          struct dirent* pdir,
 107                          size_t count,
 108                          int* out_bytes);
 109
 110  private:
 111   static int FillDirCallback(void* buf,
 112                              const char* name,
 113                              const struct stat* stbuf,
 114                              off_t off);
 115
 116  private:
 117   friend class FuseFs;
 118   DISALLOW_COPY_AND_ASSIGN(DirFuseFsNode);
 119 };
 120
 121 }  // namespace nacl_io
 122
 123 #endif  // LIBRARIES_NACL_IO_FUSEFS_FUSE_FS_H_