Update networking code that computes the CRC32C of packets to just call crc32c() without unnecessary abstraction layers. The result is faster and simpler code. Patches 1-7 add skb_crc32c() and remove the overly-abstracted and inefficient __skb_checksum(). Patches 8-10 replace skb_copy_and_hash_datagram_iter() with skb_copy_and_crc32c_datagram_iter(), eliminating the unnecessary use of the crypto layer. This unblocks the conversion of nvme-tcp to call crc32c() directly instead of using the crypto layer, which patch 9 does. I'm proposing that this series be taken through net-next for 6.16, but patch 9 could use an ack from the NVME maintainers. Eric Biggers (10): net: introduce CONFIG_NET_CRC32C net: add skb_crc32c() net: use skb_crc32c() in skb_crc32c_csum_help() RDMA/siw: use skb_crc32c() instead of __skb_checksum() sctp: use skb_crc32c() instead of __skb_checksum() net: fold __skb_checksum() into skb_checksum() lib/crc32: remove unused support for CRC32C combination net: add skb_copy_and_crc32c_datagram_iter() nvme-tcp: use crc32c() and skb_copy_and_crc32c_datagram_iter() net: remove skb_copy_and_hash_datagram_iter() drivers/infiniband/sw/siw/Kconfig | 1 + drivers/infiniband/sw/siw/siw.h | 22 +---- drivers/nvme/host/Kconfig | 4 +- drivers/nvme/host/tcp.c | 118 +++++++++----------------- include/linux/crc32.h | 23 ------ include/linux/skbuff.h | 16 +--- include/net/checksum.h | 12 --- include/net/sctp/checksum.h | 29 +------ lib/crc32.c | 6 -- lib/tests/crc_kunit.c | 6 -- net/Kconfig | 4 + net/core/datagram.c | 34 ++++---- net/core/dev.c | 10 +-- net/core/skbuff.c | 132 ++++++++++++++++++------------ net/netfilter/Kconfig | 4 +- net/netfilter/ipvs/Kconfig | 2 +- net/openvswitch/Kconfig | 2 +- net/sched/Kconfig | 2 +- net/sctp/Kconfig | 2 +- net/sctp/offload.c | 1 - 20 files changed, 156 insertions(+), 274 deletions(-) base-commit: 0b28182c73a3d013bcabbb890dc1070a8388f55a -- 2.49.0
