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Yonghong Song b0c9eb3781 bpf: Make bpf_link_info.iter similar to bpf_iter_link_info
bpf_link_info.iter is used by link_query to return bpf_iter_link_info
to user space. Fields may be different, e.g., map_fd vs. map_id, so
we cannot reuse the exact structure. But make them similar, e.g.,

  struct bpf_link_info {
     /* common fields */
     union {
	struct { ... } raw_tracepoint;
	struct { ... } tracing;
	...
	struct {
	    /* common fields for iter */
	    union {
		struct {
		    __u32 map_id;
		} map;
		/* other structs for other targets */
	    };
	};
    };
 };

so the structure is extensible the same way as bpf_iter_link_info.

Fixes: 6b0a249a30 ("bpf: Implement link_query for bpf iterators")
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200828051922.758950-1-yhs@fb.com
2020-08-28 14:33:24 +02:00
arch
block
certs
crypto
Documentation bpf: Update .BTF_ids section in btf.rst with sets info 2020-08-25 15:41:15 -07:00
drivers
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include bpf: Make bpf_link_info.iter similar to bpf_iter_link_info 2020-08-28 14:33:24 +02:00
init
ipc
kernel bpf: Fix a verifier failure with xor 2020-08-26 21:47:32 -07:00
lib
LICENSES
mm
net bpf: Allow local storage to be used from LSM programs 2020-08-25 15:00:04 -07:00
samples
scripts bpf: Add d_path helper 2020-08-25 15:41:15 -07:00
security bpf: Implement bpf_local_storage for inodes 2020-08-25 15:00:04 -07:00
sound
tools bpf: Make bpf_link_info.iter similar to bpf_iter_link_info 2020-08-28 14:33:24 +02:00
usr
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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.