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| Filename | Latest commit message | Latest commit date |
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5ecd8c2273
Add selftests for bpf_skb_ancestor_cgroup_id helper. test_skb_cgroup_id.sh prepares testing interface and adds tc qdisc and filter for it using BPF object compiled from test_skb_cgroup_id_kern.c program. BPF program in test_skb_cgroup_id_kern.c gets ancestor cgroup id using the new helper at different levels of cgroup hierarchy that skb belongs to, including root level and non-existing level, and saves it to the map where the key is the level of corresponding cgroup and the value is its id. To trigger BPF program, user space program test_skb_cgroup_id_user is run. It adds itself into testing cgroup and sends UDP datagram to link-local multicast address of testing interface. Then it reads cgroup ids saved in kernel for different levels from the BPF map and compares them with those in user space. They must be equal for every level of ancestry. Example of run: # ./test_skb_cgroup_id.sh Wait for testing link-local IP to become available ... OK Note: 8 bytes struct bpf_elf_map fixup performed due to size mismatch! [PASS] Signed-off-by: Andrey Ignatov <rdna@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> |
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| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.