bpf: libbpf: retry map creation without the name

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[ Upstream commit 23499442c3 ]

Since commit 88cda1c9da ("bpf: libbpf: Provide basic API support
to specify BPF obj name"), libbpf unconditionally sets bpf_attr->name
for maps. Pre v4.14 kernels don't know about map names and return an
error about unexpected non-zero data. Retry sys_bpf without a map
name to cover older kernels.

v2 changes:
* check for errno == EINVAL as suggested by Daniel Borkmann

Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Stanislav Fomichev 2018-11-19 14:49:01 -08:00 • committed by Greg Kroah-Hartman

parent 8f718712ff

commit c353884411

1 changed files with 10 additions and 1 deletions

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tools/lib/bpf/bpf.c

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