On Tue, Mar 15, 2022 at 03:16:01PM -0700, Boris Burkov wrote: > btrfs, ext4, and f2fs cache the Merkle tree past EOF, which restricts > the maximum file size beneath the normal maximum. Test the logic in > those filesystems against files with sizes near the maximum. > > To work properly, this does require some understanding of the practical > but not standardized layout of the Merkle tree. This is a bit unpleasant > and could make the test incorrect in the future, if the implementation > changes. On the other hand, it feels quite useful to test this tricky > edge case. It could perhaps be made more generic by adding some ioctls > to let the file system communicate the maximum file size for a verity > file or some information about the storage of the Merkle tree. > > Signed-off-by: Boris Burkov <boris@xxxxxx> > --- > common/verity | 11 ++++++++ > tests/generic/690 | 64 +++++++++++++++++++++++++++++++++++++++++++ > tests/generic/690.out | 7 +++++ > 3 files changed, 82 insertions(+) > create mode 100755 tests/generic/690 > create mode 100644 tests/generic/690.out Reviewed-by: Eric Biggers <ebiggers@xxxxxxxxxx> - Eric
