mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-05-09 12:33:18 -04:00
c9f1155645
The commit9e926acda0("libbpf: Find correct module BTFs for struct_ops maps and progs.") sets a newly added field (value_type_btf_obj_fd) to -1 in libbpf when the caller of the libbpf's bpf_map_create did not define this field by passing a NULL "opts" or passing in a "opts" that does not cover this new field. OPT_HAS(opts, field) is used to decide if the field is defined or not: ((opts) && opts->sz >= offsetofend(typeof(*(opts)), field)) Once OPTS_HAS decided the field is not defined, that field should be set to 0. For this particular new field (value_type_btf_obj_fd), its corresponding map_flags "BPF_F_VTYPE_BTF_OBJ_FD" is not set. Thus, the kernel does not treat it as an fd field. Fixes:9e926acda0("libbpf: Find correct module BTFs for struct_ops maps and progs.") Reported-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20240124224418.2905133-1-martin.lau@linux.dev Signed-off-by: Alexei Starovoitov <ast@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.