diff options
Diffstat (limited to 'internal/contentenc')
| -rw-r--r-- | internal/contentenc/content.go | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/internal/contentenc/content.go b/internal/contentenc/content.go index 76b486d..57ad489 100644 --- a/internal/contentenc/content.go +++ b/internal/contentenc/content.go @@ -71,15 +71,17 @@ type ContentEnc struct { // New returns an initialized ContentEnc instance. func New(cc *cryptocore.CryptoCore, plainBS uint64, forceDecode bool) *ContentEnc { + if fuse.MAX_KERNEL_WRITE%plainBS != 0 { + log.Panicf("unaligned MAX_KERNEL_WRITE=%d", fuse.MAX_KERNEL_WRITE) + } cipherBS := plainBS + uint64(cc.IVLen) + cryptocore.AuthTagLen // Take IV and GHASH overhead into account. cReqSize := int(fuse.MAX_KERNEL_WRITE / plainBS * cipherBS) - // An unaligned read (could happen with O_DIRECT?) may touch one - // additional ciphertext block. Reserve space for it. + // Unaligned reads (happens during fsck, could also happen with O_DIRECT?) + // touch one additional ciphertext and plaintext block. Reserve space for the + // extra block. cReqSize += int(cipherBS) - if fuse.MAX_KERNEL_WRITE%plainBS != 0 { - log.Panicf("unaligned MAX_KERNEL_WRITE=%d", fuse.MAX_KERNEL_WRITE) - } + pReqSize := fuse.MAX_KERNEL_WRITE + int(plainBS) c := &ContentEnc{ cryptoCore: cc, plainBS: plainBS, @@ -90,7 +92,7 @@ func New(cc *cryptocore.CryptoCore, plainBS uint64, forceDecode bool) *ContentEn cBlockPool: newBPool(int(cipherBS)), CReqPool: newBPool(cReqSize), pBlockPool: newBPool(int(plainBS)), - PReqPool: newBPool(fuse.MAX_KERNEL_WRITE), + PReqPool: newBPool(pReqSize), } return c } |