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selftests/bpf: Don't hard-code root cgroup id 

Commit 40430452fd ("kernfs: use 64bit inos if ino_t is 64bit") changed
the way cgroup ids are exposed to the userspace. Instead of assuming
fixed root id, let's query it.

Fixes: 40430452fd ("kernfs: use 64bit inos if ino_t is 64bit")
Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20191202200143.250793-1-sdf@google.com
This commit is contained in:
Stanislav Fomichev 2019-12-02 12:01:43 -08:00 committed by Alexei Starovoitov
parent edbca120a8
commit 01d434ce98
1 changed files with 1 additions and 1 deletions
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tools/testing/selftests/bpf/test_skb_cgroup_id_user.c
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@ -120,7 +120,7 @@ int check_ancestor_cgroup_ids(int prog_id)
int err = 0;
int map_fd;
expected_ids[0] = 0x100000001; /* root cgroup */
expected_ids[0] = get_cgroup_id("/.."); /* root cgroup */
expected_ids[1] = get_cgroup_id("");
expected_ids[2] = get_cgroup_id(CGROUP_PATH);
expected_ids[3] = 0; /* non-existent cgroup */