This work adds a generic sk_msg layer and converts both sockmap and later ktls over to make use of it as a common data structure for application data (similarly as sk_buff for network packets). With that in place the sk_msg framework spans accross ULP layer in the kernel and allows for introspection or filtering of L7 data with the help of BPF programs operating on a common input context.
In a second step, we enable the latter for ktls which was previously not possible, meaning, ktls and sk_msg verdict programs were mutually exclusive in the ULP layer which created challenges for the orchestrator when trying to apply TCP based policy, for example. Leveraging the prior consolidation we can finally overcome this limitation. Note, there's no change in behavior when ktls is not used in combination with BPF, and also no change in behavior for stand alone sockmap. The kselftest suites for ktls, sockmap and ktls with sockmap combined also runs through successfully. For further details please see individual patches. Thanks! Daniel Borkmann (5): tcp, ulp: enforce sock_owned_by_me upon ulp init and cleanup tcp, ulp: remove ulp bits from sockmap bpf, sockmap: convert to generic sk_msg interface tls: convert to generic sk_msg interface bpf, doc: add maintainers entry to related files John Fastabend (3): tls: replace poll implementation with read hook tls: add bpf support to sk_msg handling bpf: add tls support for testing in test_sockmap MAINTAINERS | 10 + include/linux/bpf.h | 33 +- include/linux/bpf_types.h | 2 +- include/linux/filter.h | 21 - include/linux/skmsg.h | 410 +++++ include/net/sock.h | 4 - include/net/tcp.h | 28 +- include/net/tls.h | 24 +- kernel/bpf/Makefile | 5 - kernel/bpf/core.c | 2 - kernel/bpf/sockmap.c | 2629 ---------------------------- kernel/bpf/syscall.c | 6 +- net/Kconfig | 11 + net/core/Makefile | 2 + net/core/filter.c | 270 +-- net/core/skmsg.c | 802 +++++++++ net/core/sock.c | 61 - net/core/sock_map.c | 1002 +++++++++++ net/ipv4/Makefile | 1 + net/ipv4/tcp_bpf.c | 655 +++++++ net/ipv4/tcp_ulp.c | 73 +- net/strparser/Kconfig | 4 +- net/tls/Kconfig | 1 + net/tls/tls_device.c | 2 +- net/tls/tls_main.c | 11 +- net/tls/tls_sw.c | 900 ++++++---- tools/testing/selftests/bpf/test_sockmap.c | 89 + 27 files changed, 3666 insertions(+), 3392 deletions(-) create mode 100644 include/linux/skmsg.h delete mode 100644 kernel/bpf/sockmap.c create mode 100644 net/core/skmsg.c create mode 100644 net/core/sock_map.c create mode 100644 net/ipv4/tcp_bpf.c -- 2.9.5
