To allow computation of SCTP checksum in net core after sctp.ko (and thus ipv6_dst_lookup), introduce a stub struct skb_checksum_ops Like it has been done previously with other Sctp_compute_checksum requires crc32c symbol (provided by libcrc32c), so
` (3 subsequent siblings) 4 siblings, 0 replies 52+ messages in thread 16:52 ` net: split skb_checksum_help Davide Caratti 16:52 net: improve support for SCTP checksums Davide 16:52 ` Davide Caratti
We now use dynamichexdump() unless DEBUG is set. This started after commit 091cb0994edd ('lib/hexdump: make printhexdumpbytes() a nop on DEBUG builds'). Skbuff: add stub to help computing crc32c on SCTP packets The module param debug for ngsm uses KERNINFO level, but the hexdump now uses KERNDEBUG level. Protocol number and netdev features bitmask skb_csum_hwoffload_help, called by validate xmit skb to perform SWĬhecksumming using the correct algorithm based on the value of IP Skb_checksum_help, that performs SW checksumming for skbs using crc32c skb_sctp_csum_help, a function sharing common code with the original the possibility to compute crc32c on skbs in Linux net core This series tries to address the above issue, by providing: packet being transmitted with 2-complement checksum instead of crc32c packet being transmitted with identically-zero checksum Results in wrong handling of SCTP, leading to:
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Then most NIC drivers can only call skb_checksum_help if their HW can't Set on netdev features, validate_xmit_skb skips checksum computation - but Finally, even when at least one bit in NETIF_F_CSUM_MASK is Of NETIF_F_SCTP_CRC, so any chance to offload crc32c computation on the Moreover, this is done regardless the value This results in a systematic corruption of SCTP packets, since they need Skbs having ip_summed equal to CHECKSUM_PARTIAL. Uses skb_checksum_help to compute 16-bit, 2-complement checksum on non-GSO When NETIF_F_CSUM_MASK bits are all 0 on netdev features, validate_xmit_skb Miller +Cc: netdev, linux-sctp, Marcelo Ricardo Leitner ` (4 more replies) 0 siblings, 5 replies 52+ messages in threadįrom: Davide Caratti 16:52 UTC ( / raw) 16:52 ` skbuff: add stub to help computing crc32c on SCTP packets Davide Caratti
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Net: improve support for SCTP checksums Netdev Archive on help / color / mirror / Atom feed * net: improve support for SCTP checksums 16:52 Davide Caratti
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