lib: crc32: add functionality to combine two crc32{, c}s in GF(2)
This patch adds a combinator to merge two or more crc32{,c}s into a new one. This is useful for checksum computations of fragmented skbs that use crc32/crc32c as checksums. The arithmetics for combining both in the GF(2) was taken and slightly modified from zlib. Only passing two crcs is insufficient as two crcs and the length of the second piece is needed for merging. The code is made generic, so that only polynomials need to be passed for crc32_le resp. crc32c_le. Signed-off-by:Daniel Borkmann <dborkman@redhat.com> Cc: linux-kernel@vger.kernel.org Signed-off-by:
David S. Miller <davem@davemloft.net>
parent
d921e049
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