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Kuniyuki Iwashima says: ==================== This patch set adds BPF iterator support for UNIX domain socket. The first patch implements it, and the second adds "%c" support for BPF_SEQ_PRINTF(). Thanks to Yonghong Song for the fix [0] for the LLVM code gen. The fix prevents the LLVM compiler from transforming the loop exit condition '<' to '!=', where the upper bound is not a constant. The transformation leads the verifier to interpret it as an infinite loop. And thanks to Andrii Nakryiko for its workaround [1]. [0] https://reviews.llvm.org/D107483 [1] https://lore.kernel.org/netdev/CAEf4BzZ3sVx1m1mOCcPcuVPiY6cWEAO=6VGHDiXEs9ZVD-RoLg@mail.gmail.com/ Changelog: v6: - Align the header "Inde" column - Change int vars to __u64 not to break test_progs-no_alu32 - Move the if statement into the for loop not to depend on the fix [0] - Drop the README change - Modify "%c" positive test patterns v5: https://lore.kernel.org/netdev/20210812164557.79046-1-kuniyu@amazon.co.jp/ - Align header line of bpf_iter_unix.c - Add test for "%c" v4: https://lore.kernel.org/netdev/20210810092807.13190-1-kuniyu@amazon.co.jp/ - Check IS_BUILTIN(CONFIG_UNIX) - Support "%c" in BPF_SEQ_PRINTF() - Uncomment the code to print the name of the abstract socket - Mention the LLVM fix in README.rst - Remove the 'aligned' attribute in bpf_iter.h - Keep the format string on a single line v3: https://lore.kernel.org/netdev/20210804070851.97834-1-kuniyu@amazon.co.jp/ - Export some functions for CONFIG_UNIX=m v2: https://lore.kernel.org/netdev/20210803011110.21205-1-kuniyu@amazon.co.jp/ - Implement bpf_iter specific seq_ops->stop() - Add bpf_iter__unix in bpf_iter.h - Move common definitions in selftest to bpf_tracing_net.h - Include the code for abstract UNIX domain socket as comment in selftest - Use ASSERT_OK_PTR() instead of CHECK() - Make ternary operators on single line v1: https://lore.kernel.org/netdev/20210729233645.4869-1-kuniyu@amazon.co.jp/ ==================== Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
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.