Recently I recieve a bug report that bcache does not work on IBM s390x, I find the problem is from endianness support and checksum calculation. Both user space tools and Linux kernel code should be fixed, this patch set is the modification to user space tools. Ideas of this patch set are, 1, super block members should be swapped to little endian before writting down to media. 2, super block members should be explicitly swapped to little endian before calculate checksum. 3, checksum also should be swapped to little endian before writiting down to media. 4, checksum is checked before super block members being swapped into CPU byteorder. The first 3 patches are preparation and the last patch does big endian support. NOTE: Linux kernel code also needs to be patched, this patch set just makes new created bcache devices in a correct byte order. Coly Li --- Coly Li (4): bcache-tools: change bcache.c:crc64() to non-inline function bcache-tools: only set/display sb.bucket_size for cache devices bcache-tools: print more super block information in bcache-super-show bcache-tools: add CPU endianness support bcache-super-show.c | 52 +++++++++++++++++++++----------- bcache.c | 75 ++++++++++++++++++++++++++++++++++++++++++++- bcache.h | 19 +++++++++--- byteorder.h | 87 +++++++++++++++++++++++++++++++++++++++++++++++++++++ make-bcache.c | 5 +-- 5 files changed, 212 insertions(+), 26 deletions(-) create mode 100644 byteorder.h -- 2.16.2
