Пример #1
0
func (f benchFile) Open(req *fuse.OpenRequest, resp *fuse.OpenResponse, intr fs.Intr) (fs.Handle, fuse.Error) {
	if f.conf.directIO {
		resp.Flags |= fuse.OpenDirectIO
	}
	// TODO configurable?
	resp.Flags |= fuse.OpenKeepCache
	return f, nil
}
Пример #2
0
// Empirically:
//  open for read:   req.Flags == 0
//  open for append: req.Flags == 1
//  open for write:  req.Flags == 1
//  open for read/write (+<)   == 2 (bitmask? of?)
//
// open flags are O_WRONLY (1), O_RDONLY (0), or O_RDWR (2). and also
// bitmaks of O_SYMLINK (0x200000) maybe. (from
// fuse_filehandle_xlate_to_oflags in macosx/kext/fuse_file.h)
func (n *mutFile) Open(req *fuse.OpenRequest, res *fuse.OpenResponse, intr fs.Intr) (fs.Handle, fuse.Error) {
	mutFileOpen.Incr()

	log.Printf("mutFile.Open: %v: content: %v dir=%v flags=%v", n.permanode, n.content, req.Dir, req.Flags)
	r, err := schema.NewFileReader(n.fs.fetcher, n.content)
	if err != nil {
		mutFileOpenError.Incr()
		log.Printf("mutFile.Open: %v", err)
		return nil, fuse.EIO
	}

	// Turn off the OpenDirectIO bit (on by default in rsc fuse server.go),
	// else append operations don't work for some reason.
	res.Flags &= ^fuse.OpenDirectIO

	// Read-only.
	if !isWriteFlags(req.Flags) {
		mutFileOpenRO.Incr()
		log.Printf("mutFile.Open returning read-only file")
		n := &node{
			fs:      n.fs,
			blobref: n.content,
		}
		return &nodeReader{n: n, fr: r}, nil
	}

	mutFileOpenRW.Incr()
	log.Printf("mutFile.Open returning read-write filehandle")

	defer r.Close()
	return n.newHandle(r)
}
Пример #3
0
// Empirically:
//  open for read:   req.Flags == 0
//  open for append: req.Flags == 1
//  open for write:  req.Flags == 1
//  open for read/write (+<)   == 2 (bitmask? of?)
//
// open flags are O_WRONLY (1), O_RDONLY (0), or O_RDWR (2). and also
// bitmaks of O_SYMLINK (0x200000) maybe. (from
// fuse_filehandle_xlate_to_oflags in macosx/kext/fuse_file.h)
func (n *roFile) Open(req *fuse.OpenRequest, res *fuse.OpenResponse, intr fs.Intr) (fs.Handle, fuse.Error) {
	roFileOpen.Incr()

	if isWriteFlags(req.Flags) {
		return nil, fuse.EPERM
	}

	log.Printf("roFile.Open: %v: content: %v dir=%v flags=%v", n.permanode, n.content, req.Dir, req.Flags)
	r, err := schema.NewFileReader(n.fs.fetcher, n.content)
	if err != nil {
		roFileOpenError.Incr()
		log.Printf("roFile.Open: %v", err)
		return nil, fuse.EIO
	}

	// Turn off the OpenDirectIO bit (on by default in rsc fuse server.go),
	// else append operations don't work for some reason.
	res.Flags &= ^fuse.OpenDirectIO

	// Read-only.
	nod := &node{
		fs:      n.fs,
		blobref: n.content,
	}
	return &nodeReader{n: nod, fr: r}, nil
}
Пример #4
0
func (f directRead) Open(req *fuse.OpenRequest, resp *fuse.OpenResponse, intr fs.Intr) (fs.Handle, fuse.Error) {
	// do not allow the kernel to use page cache
	resp.Flags |= fuse.OpenDirectIO
	return f, nil
}
Пример #5
0
func (s *stat) Open(req *fuse.OpenRequest, res *fuse.OpenResponse, intr fs.Intr) (fs.Handle, fuse.Error) {
	// Set DirectIO to keep this file from being cached in OS X's kernel.
	res.Flags |= fuse.OpenDirectIO
	return s, nil
}