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128 lines
3.5 KiB
Go
128 lines
3.5 KiB
Go
// +build linux,go1.13 freebsd,go1.13
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package mount
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import (
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"context"
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"time"
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"bazil.org/fuse"
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fusefs "bazil.org/fuse/fs"
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"github.com/rclone/rclone/fs/log"
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"github.com/rclone/rclone/vfs"
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)
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// File represents a file
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type File struct {
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*vfs.File
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fsys *FS
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}
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// Check interface satisfied
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var _ fusefs.Node = (*File)(nil)
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// Attr fills out the attributes for the file
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func (f *File) Attr(ctx context.Context, a *fuse.Attr) (err error) {
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defer log.Trace(f, "")("a=%+v, err=%v", a, &err)
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a.Valid = f.fsys.opt.AttrTimeout
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modTime := f.File.ModTime()
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Size := uint64(f.File.Size())
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Blocks := (Size + 511) / 512
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a.Gid = f.VFS().Opt.GID
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a.Uid = f.VFS().Opt.UID
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a.Mode = f.VFS().Opt.FilePerms
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a.Size = Size
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a.Atime = modTime
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a.Mtime = modTime
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a.Ctime = modTime
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a.Crtime = modTime
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a.Blocks = Blocks
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return nil
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}
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// Check interface satisfied
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var _ fusefs.NodeSetattrer = (*File)(nil)
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// Setattr handles attribute changes from FUSE. Currently supports ModTime and Size only
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func (f *File) Setattr(ctx context.Context, req *fuse.SetattrRequest, resp *fuse.SetattrResponse) (err error) {
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defer log.Trace(f, "a=%+v", req)("err=%v", &err)
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if !f.VFS().Opt.NoModTime {
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if req.Valid.Mtime() {
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err = f.File.SetModTime(req.Mtime)
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} else if req.Valid.MtimeNow() {
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err = f.File.SetModTime(time.Now())
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}
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}
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if req.Valid.Size() {
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err = f.File.Truncate(int64(req.Size))
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}
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return translateError(err)
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}
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// Check interface satisfied
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var _ fusefs.NodeOpener = (*File)(nil)
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// Open the file for read or write
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func (f *File) Open(ctx context.Context, req *fuse.OpenRequest, resp *fuse.OpenResponse) (fh fusefs.Handle, err error) {
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defer log.Trace(f, "flags=%v", req.Flags)("fh=%v, err=%v", &fh, &err)
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// fuse flags are based off syscall flags as are os flags, so
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// should be compatible
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handle, err := f.File.Open(int(req.Flags))
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if err != nil {
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return nil, translateError(err)
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}
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// If size unknown then use direct io to read
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if entry := handle.Node().DirEntry(); entry != nil && entry.Size() < 0 {
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resp.Flags |= fuse.OpenDirectIO
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}
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return &FileHandle{handle}, nil
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}
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// Check interface satisfied
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var _ fusefs.NodeFsyncer = (*File)(nil)
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// Fsync the file
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//
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// Note that we don't do anything except return OK
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func (f *File) Fsync(ctx context.Context, req *fuse.FsyncRequest) (err error) {
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defer log.Trace(f, "")("err=%v", &err)
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return nil
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}
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// Getxattr gets an extended attribute by the given name from the
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// node.
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//
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// If there is no xattr by that name, returns fuse.ErrNoXattr.
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func (f *File) Getxattr(ctx context.Context, req *fuse.GetxattrRequest, resp *fuse.GetxattrResponse) error {
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return fuse.ENOSYS // we never implement this
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}
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var _ fusefs.NodeGetxattrer = (*File)(nil)
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// Listxattr lists the extended attributes recorded for the node.
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func (f *File) Listxattr(ctx context.Context, req *fuse.ListxattrRequest, resp *fuse.ListxattrResponse) error {
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return fuse.ENOSYS // we never implement this
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}
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var _ fusefs.NodeListxattrer = (*File)(nil)
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// Setxattr sets an extended attribute with the given name and
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// value for the node.
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func (f *File) Setxattr(ctx context.Context, req *fuse.SetxattrRequest) error {
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return fuse.ENOSYS // we never implement this
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}
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var _ fusefs.NodeSetxattrer = (*File)(nil)
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// Removexattr removes an extended attribute for the name.
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//
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// If there is no xattr by that name, returns fuse.ErrNoXattr.
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func (f *File) Removexattr(ctx context.Context, req *fuse.RemovexattrRequest) error {
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return fuse.ENOSYS // we never implement this
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}
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var _ fusefs.NodeRemovexattrer = (*File)(nil)
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