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SubjectRe: [PATCH 6/7] omfs: add checksumming routines
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On Wed, 2008-03-26 at 20:45 -0400, Bob Copeland wrote:
> OMFS checksums the metadata of all filesystem objects. This change adds
> the necessary functions to do so.
>
> Signed-off-by: Bob Copeland <me@bobcopeland.com>
> ---
> fs/omfs/checksum.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
> 1 files changed, 48 insertions(+), 0 deletions(-)
> create mode 100644 fs/omfs/checksum.c
>
> diff --git a/fs/omfs/checksum.c b/fs/omfs/checksum.c
> new file mode 100644
> index 0000000..d6f1023
> --- /dev/null
> +++ b/fs/omfs/checksum.c
> @@ -0,0 +1,48 @@
> +#include <linux/fs.h>
> +#include <linux/buffer_head.h>
> +#include "omfs.h"
> +
> +#define POLY 0x1021
> +
> +/*
> + * crc-ccitt with MSB first (i.e., backwards), so we can't use the
> + * kernel table as-is.
> + */

Why not just add a be-bitwise table, similar to the crc32_le and
crc32_be implementation.


Harvey



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