Merge branch 'bpf-sk-msg-size-member'

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John Fastabend says:

====================
This adds a size field to the sk_msg_md data structure used by SK_MSG
programs. Without this in the zerocopy case and in the copy case
where multiple iovs are in use its difficult to know how much data
can be pulled in. The normal method of reading data and data_end
only give the current contiguous buffer. BPF programs can attempt to
pull in extra data but have to guess if it exists. This can result
in multiple "guesses" its much better if we know upfront the size
of the sk_msg.
====================

Acked-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

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Daniel Borkmann 2018-12-19 00:27:24 +01:00

parent 0bae2d4d62 945a47d87c

commit dd4bfda9cf

5 changed files with 24 additions and 3 deletions

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3

include/linux/skmsg.h

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1

include/uapi/linux/bpf.h

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6

net/core/filter.c

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1

tools/include/uapi/linux/bpf.h

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16

tools/testing/selftests/bpf/test_verifier.c

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