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2958624b25
New TX timestamping sock_ops callbacks will be added in the subsequent patch. Some of the existing BPF helpers will not be safe to be used in the TX timestamping callbacks. The bpf_sock_ops_setsockopt, bpf_sock_ops_getsockopt, and bpf_sock_ops_cb_flags_set require owning the sock lock. TX timestamping callbacks will not own the lock. The bpf_sock_ops_load_hdr_opt needs the skb->data pointing to the TCP header. This will not be true in the TX timestamping callbacks. At the beginning of these helpers, this patch checks the bpf_sock->op to ensure these helpers are used by the existing sock_ops callbacks only. Signed-off-by: Jason Xing <kerneljasonxing@gmail.com> Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org> Link: https://patch.msgid.link/20250220072940.99994-5-kerneljasonxing@gmail.com
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 reStructuredText 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.