diff options
Diffstat (limited to 'internal/fusefrontend/file_holes.go')
| -rw-r--r-- | internal/fusefrontend/file_holes.go | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/internal/fusefrontend/file_holes.go b/internal/fusefrontend/file_holes.go index 5b7a244..d779191 100644 --- a/internal/fusefrontend/file_holes.go +++ b/internal/fusefrontend/file_holes.go @@ -30,7 +30,7 @@ func (f *file) writePadHole(targetOff int64) fuse.Status { } // The write goes past the next block. nextBlock has // to be zero-padded to the block boundary and (at least) nextBlock+1 - // will become a file hole in the ciphertext. + // will contain a file hole in the ciphertext. status := f.zeroPad(plainSize) if status != fuse.OK { tlog.Warn.Printf("zeroPad returned error %v", status) @@ -39,14 +39,15 @@ func (f *file) writePadHole(targetOff int64) fuse.Status { return fuse.OK } -// Zero-pad the file of size plainSize to the next block boundary +// Zero-pad the file of size plainSize to the next block boundary. This is a no-op +// if the file is already block-aligned. func (f *file) zeroPad(plainSize uint64) fuse.Status { lastBlockLen := plainSize % f.contentEnc.PlainBS() - missing := f.contentEnc.PlainBS() - lastBlockLen - if missing == 0 { + if lastBlockLen == 0 { // Already block-aligned return fuse.OK } + missing := f.contentEnc.PlainBS() - lastBlockLen pad := make([]byte, missing) tlog.Debug.Printf("zeroPad: Writing %d bytes\n", missing) _, status := f.doWrite(pad, int64(plainSize)) |