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| author | Jakub Kicinski <jakub.kicinski@netronome.com> | 2017-11-03 13:56:18 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-11-05 22:26:18 +0900 |
| commit | bd601b6ada11fdfb9e277f24ad2eb54bc599156b (patch) | |
| tree | 358763b441dfcc6d0a3a8a6e75878f1f08cb60e3 /kernel | |
| parent | ab3f0063c48c26c927851b6767824e35a716d878 (diff) | |
| download | linux-bd601b6ada11fdfb9e277f24ad2eb54bc599156b.tar.bz2 | |
bpf: report offload info to user space
Extend struct bpf_prog_info to contain information about program
being bound to a device. Since the netdev may get destroyed while
program still exists we need a flag to indicate the program is
loaded for a device, even if the device is gone.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/bpf/offload.c | 12 | ||||
| -rw-r--r-- | kernel/bpf/syscall.c | 5 |
2 files changed, 17 insertions, 0 deletions
diff --git a/kernel/bpf/offload.c b/kernel/bpf/offload.c index 5553e0e2f8b1..2816feb38be1 100644 --- a/kernel/bpf/offload.c +++ b/kernel/bpf/offload.c @@ -144,6 +144,18 @@ int bpf_prog_offload_compile(struct bpf_prog *prog) return bpf_prog_offload_translate(prog); } +u32 bpf_prog_offload_ifindex(struct bpf_prog *prog) +{ + struct bpf_dev_offload *offload = prog->aux->offload; + u32 ifindex; + + rtnl_lock(); + ifindex = offload->netdev ? offload->netdev->ifindex : 0; + rtnl_unlock(); + + return ifindex; +} + const struct bpf_prog_ops bpf_offload_prog_ops = { }; diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c index 1574b9f0f24e..3217c20ea91b 100644 --- a/kernel/bpf/syscall.c +++ b/kernel/bpf/syscall.c @@ -1592,6 +1592,11 @@ static int bpf_prog_get_info_by_fd(struct bpf_prog *prog, return -EFAULT; } + if (bpf_prog_is_dev_bound(prog->aux)) { + info.status |= BPF_PROG_STATUS_DEV_BOUND; + info.ifindex = bpf_prog_offload_ifindex(prog); + } + done: if (copy_to_user(uinfo, &info, info_len) || put_user(info_len, &uattr->info.info_len)) |