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bpftool: Change pid_iter.bpf.c to comply with the change of bpf_link_fops.

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To support epoll, a new instance of file_operations, bpf_link_fops_poll,
has been added for links that support epoll. The pid_iter.bpf.c checks
f_ops for links and other BPF objects. The check should fail for struct_ops
links without this patch.

Acked-by: Quentin Monnet <qmo@kernel.org>
Signed-off-by: Kui-Feng Lee <thinker.li@gmail.com>
Link: https://lore.kernel.org/r/20240530065946.979330-9-thinker.li@gmail.com
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
This commit is contained in:
Kui-Feng Lee 2024-05-29 23:59:46 -07:00 committed by Martin KaFai Lau
parent 1a4b858b6a
commit d14c1fac0c
1 changed files with 6 additions and 1 deletions
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7
tools/bpf/bpftool/skeleton/pid_iter.bpf.c
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@ -29,6 +29,7 @@ enum bpf_link_type___local {
};
extern const void bpf_link_fops __ksym;
extern const void bpf_link_fops_poll __ksym __weak;
extern const void bpf_map_fops __ksym;
extern const void bpf_prog_fops __ksym;
extern const void btf_fops __ksym;
@ -84,7 +85,11 @@ int iter(struct bpf_iter__task_file *ctx)
fops = &btf_fops;
break;
case BPF_OBJ_LINK:
fops = &bpf_link_fops;
if (&bpf_link_fops_poll &&
file->f_op == &bpf_link_fops_poll)
fops = &bpf_link_fops_poll;
else
fops = &bpf_link_fops;
break;
default:
return 0;