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0c9a7a7e20
This patch cleans up a few things in the verifier:
* type_is_pkt_pointer():
Future work (skb + xdp dynptrs [0]) will be using the reg type
PTR_TO_PACKET | PTR_MAYBE_NULL. type_is_pkt_pointer() should return
true for any type whose base type is PTR_TO_PACKET, regardless of
flags attached to it.
* reg_type_may_be_refcounted_or_null():
Get the base type at the start of the function to avoid
having to recompute it / improve readability
* check_func_proto(): remove unnecessary 'meta' arg
* check_helper_call():
Use switch casing on the base type of return value instead of
nested ifs on the full type
There are no functional behavior changes.
[0] https://lore.kernel.org/bpf/20220726184706.954822-1-joannelkoong@gmail.com/
Signed-off-by: Joanne Koong <joannelkoong@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: https://lore.kernel.org/bpf/20220802214638.3643235-1-joannelkoong@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 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.