Changes since v1 [1]: - Patches went through 3 iterations inside bigger TCP-AO patch set [2], now I'm splitting it apart and sending it once again as a stand-alone patch set to help reviewing it and make it easier to merge. It is second part of that big series, once it merges the next part will be TCP changes to add Authentication Option support (RFC5925), that use API provided by these patches. - Corrected kerneldoc-style comment near crypto_pool_reserve_scratch() (Reported-By: kernel test robot <lkp@xxxxxxxxx>) - Added short Documentation/ page for crypto_pool API Add crypto_pool - an API for allocating per-CPU array of crypto requests on slow-path (in sleep'able contexts) and for using them on a fast-path, which is RX/TX for net/* users. The design is based on the current implementations of md5sig_pool, which this patch set makes generic by separating it from TCP core, moving it to crypto/ and adding support for other hashing algorithms than MD5. It makes a generic implementation for a common net/ pattern. The initial motivation to have this API is TCP-AO, that's going to use the very same pattern as TCP-MD5, but for multiple hashing algorithms. Previously, I've suggested to add such API on TCP-AO patch submission [3], where Herbert kindly suggested to help with introducing new crypto API. See also discussion and motivation in crypto_pool-v1 [4]. The API will allow: - to reuse per-CPU ahash_request(s) for different users - to allocate only one per-CPU scratch buffer rather than a new one for each user - to have a common API for net/ users that need ahash on RX/TX fast path In this version I've wired up TCP-MD5 and IPv6-SR-HMAC as users. Potentially, xfrm_ipcomp and xfrm_ah can be converted as well. The initial reason for patches would be to have TCP-AO as a user, which would let it share per-CPU crypto_request for any supported hashing algorithm. [1]: https://lore.kernel.org/all/20220726201600.1715505-1-dima@xxxxxxxxxx/ [2]: https://lore.kernel.org/all/20221027204347.529913-1-dima@xxxxxxxxxx/T/#u [3]: http://lkml.kernel.org/r/20211106034334.GA18577@xxxxxxxxxxxxxxxxxxx [4]: https://lore.kernel.org/all/26d5955b-3807-a015-d259-ccc262f665c2@xxxxxxxxxx/T/#u Cc: Andy Lutomirski <luto@xxxxxxxxxxxxxx> Cc: Bob Gilligan <gilligan@xxxxxxxxxx> Cc: David Ahern <dsahern@xxxxxxxxxx> Cc: "David S. Miller" <davem@xxxxxxxxxxxxx> Cc: Dmitry Safonov <0x7f454c46@xxxxxxxxx> Cc: Eric Dumazet <edumazet@xxxxxxxxxx> Cc: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Cc: Hideaki YOSHIFUJI <yoshfuji@xxxxxxxxxxxxxx> Cc: Jakub Kicinski <kuba@xxxxxxxxxx> Cc: Leonard Crestez <cdleonard@xxxxxxxxx> Cc: Paolo Abeni <pabeni@xxxxxxxxxx> Cc: Salam Noureddine <noureddine@xxxxxxxxxx> Cc: netdev@xxxxxxxxxxxxxxx Cc: linux-crypto@xxxxxxxxxxxxxxx Cc: linux-kernel@xxxxxxxxxxxxxxx Dmitry Safonov (5): crypto: Introduce crypto_pool crypto/pool: Add crypto_pool_reserve_scratch() crypto/net/tcp: Use crypto_pool for TCP-MD5 crypto/net/ipv6: sr: Switch to using crypto_pool crypto/Documentation: Add crypto_pool kernel API Documentation/crypto/crypto_pool.rst | 33 +++ crypto/Kconfig | 12 + crypto/Makefile | 1 + crypto/crypto_pool.c | 338 +++++++++++++++++++++++++++ include/crypto/pool.h | 33 +++ include/net/seg6_hmac.h | 7 - include/net/tcp.h | 24 +- net/ipv4/Kconfig | 2 +- net/ipv4/tcp.c | 105 +++------ net/ipv4/tcp_ipv4.c | 92 +++++--- net/ipv4/tcp_minisocks.c | 21 +- net/ipv6/Kconfig | 2 +- net/ipv6/seg6.c | 3 - net/ipv6/seg6_hmac.c | 204 +++++++--------- net/ipv6/tcp_ipv6.c | 53 ++--- 15 files changed, 626 insertions(+), 304 deletions(-) create mode 100644 Documentation/crypto/crypto_pool.rst create mode 100644 crypto/crypto_pool.c create mode 100644 include/crypto/pool.h base-commit: 69b41ac87e4a664de78a395ff97166f0b2943210 -- 2.39.0
