hi ido,
My error is "Exception: Command failed: cat /sys/kernel/debug/netdevsim/netdevsim0//ports/0/dev/hwstats/l3/disable_ifindex"
This one is solved by the netdevsim patch ([2]).
Thanks for your reply. About netdevsim patch ([2]), do you commit it to kernel mail list?
best regards,
________________________________________ From: Ido Schimmel idosch@idosch.org Sent: Thursday, September 8, 2022 2:23 PM To: Zhou, Jie2X Cc: kuba@kernel.org; andrii@kernel.org; mykolal@fb.com; ast@kernel.org; daniel@iogearbox.net; martin.lau@linux.dev; davem@davemloft.net; hawk@kernel.org; netdev@vger.kernel.org; bpf@vger.kernel.org; linux-kselftest@vger.kernel.org; linux-kernel@vger.kernel.org; Li, Philip; petrm@nvidia.com Subject: Re: test ./tools/testing/selftests/bpf/test_offload.py failed
On Thu, Sep 08, 2022 at 03:10:51AM +0000, Zhou, Jie2X wrote:
My error is "Exception: Command failed: cat /sys/kernel/debug/netdevsim/netdevsim0//ports/0/dev/hwstats/l3/disable_ifindex"
This one is solved by the netdevsim patch ([2]).
Do you get [1]error, after patch [2]?
Yes. Maybe you do not see it because you have an older bpftool without "libbpf_strict" feature:
$ bpftool --version bpftool v6.8.0 using libbpf v0.8 features: libbfd, libbpf_strict, skeletons
[1] # bpftool prog load /home/idosch/code/linux/tools/testing/selftests/bpf/sample_ret0.o /sys/fs/bpf/nooffload type xdp Error: object file doesn't contain any bpf program Warning: bpftool is now running in libbpf strict mode and has more stringent requirements about BPF programs. If it used to work for this object file but now doesn't, see --legacy option for more details.
[2] diff --git a/drivers/net/netdevsim/hwstats.c b/drivers/net/netdevsim/hwstats.c index 605a38e16db0..0e58aa7f0374 100644 --- a/drivers/net/netdevsim/hwstats.c +++ b/drivers/net/netdevsim/hwstats.c @@ -433,11 +433,11 @@ int nsim_dev_hwstats_init(struct nsim_dev *nsim_dev) goto err_remove_hwstats_recursive; }
debugfs_create_file("enable_ifindex", 0600, hwstats->l3_ddir, hwstats,
debugfs_create_file("enable_ifindex", 0200, hwstats->l3_ddir, hwstats, &nsim_dev_hwstats_l3_enable_fops.fops);
debugfs_create_file("disable_ifindex", 0600, hwstats->l3_ddir, hwstats,
debugfs_create_file("disable_ifindex", 0200, hwstats->l3_ddir, hwstats, &nsim_dev_hwstats_l3_disable_fops.fops);
debugfs_create_file("fail_next_enable", 0600, hwstats->l3_ddir, hwstats,
debugfs_create_file("fail_next_enable", 0200, hwstats->l3_ddir, hwstats, &nsim_dev_hwstats_l3_fail_fops.fops); INIT_DELAYED_WORK(&hwstats->traffic_dw,