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mount: update code comments

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This commit is contained in:
Nick Craig-Wood 2016-10-30 17:46:00 +00:00
parent 6846a1cc11
commit 062616e4dd
1 changed files with 2 additions and 5 deletions
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7
cmd/mount/read.go
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@ -40,6 +40,8 @@ var _ fusefs.Handle = (*ReadFileHandle)(nil)
var _ fusefs.HandleReader = (*ReadFileHandle)(nil)
// seek to a new offset
//
// Must be called with fh.mu held
func (fh *ReadFileHandle) seek(offset int64) error {
// Can we seek it directly?
if do, ok := fh.r.(io.Seeker); ok {
@ -85,11 +87,6 @@ func (fh *ReadFileHandle) Read(ctx context.Context, req *fuse.ReadRequest, resp
if req.Size > 0 {
fh.readCalled = true
}
// We don't actually enforce Offset to match where previous read
// ended. Maybe we should, but that would mean'd we need to track
// it. The kernel *should* do it for us, based on the
// fuse.OpenNonSeekable flag.
//
// One exception to the above is if we fail to fully populate a
// page cache page; a read into page cache is always page aligned.
// Make sure we never serve a partial read, to avoid that.