From 565b64148314018e1234196182b55c4f01772e77 Mon Sep 17 00:00:00 2001 From: Dean Deng Date: Wed, 8 Jan 2020 16:32:50 -0800 Subject: Define sizes for extent headers and entries separately to improve clarity. PiperOrigin-RevId: 288799694 --- pkg/sentry/fsimpl/ext/disklayout/extent.go | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) (limited to 'pkg/sentry/fsimpl/ext/disklayout/extent.go') diff --git a/pkg/sentry/fsimpl/ext/disklayout/extent.go b/pkg/sentry/fsimpl/ext/disklayout/extent.go index 567523d32..4110649ab 100644 --- a/pkg/sentry/fsimpl/ext/disklayout/extent.go +++ b/pkg/sentry/fsimpl/ext/disklayout/extent.go @@ -29,8 +29,12 @@ package disklayout // byte (i * sb.BlockSize()) to ((i+1) * sb.BlockSize()). const ( - // ExtentStructsSize is the size of all the three extent on-disk structs. - ExtentStructsSize = 12 + // ExtentHeaderSize is the size of the header of an extent tree node. + ExtentHeaderSize = 12 + + // ExtentEntrySize is the size of an entry in an extent tree node. + // This size is the same for both leaf and internal nodes. + ExtentEntrySize = 12 // ExtentMagic is the magic number which must be present in the header. ExtentMagic = 0xf30a @@ -57,7 +61,7 @@ type ExtentNode struct { Entries []ExtentEntryPair } -// ExtentEntry reprsents an extent tree node entry. The entry can either be +// ExtentEntry represents an extent tree node entry. The entry can either be // an ExtentIdx or Extent itself. This exists to simplify navigation logic. type ExtentEntry interface { // FileBlock returns the first file block number covered by this entry. -- cgit v1.2.3