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Yonghong Song says: ==================== "link" has been an important concept for bpf ecosystem to connect bpf program with other properties. Currently, the information related information can be queried from userspace through bpf command BPF_LINK_GET_NEXT_ID, BPF_LINK_GET_FD_BY_ID and BPF_OBJ_GET_INFO_BY_FD. The information is also available by "cating" /proc/<pid>/fdinfo/<link_fd>. Raw_tracepoint, tracing, cgroup, netns and xdp links are already supported in the kernel and bpftool. This patch added support for bpf iterator. Patch #1 added generic support for link querying interface. Patch #2 implemented callback functions for map element bpf iterators. Patch #3 added bpftool support. Changelogs: v3 -> v4: . return target specific link_info even if target_name buffer is empty. (Andrii) v2 -> v3: . remove extra '\t' when fdinfo prints map_id to make parsing consistent. (Andrii) v1 -> v2: . fix checkpatch.pl warnings. (Jakub) ==================== Acked-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> |
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| virt | ||
| .clang-format | ||
| .cocciconfig | ||
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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.
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.