diff options
author | Dave Airlie <airlied@redhat.com> | 2019-04-15 15:51:49 +1000 |
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committer | Dave Airlie <airlied@redhat.com> | 2019-04-15 15:51:49 +1000 |
commit | f06ddb53096b4cddad2c530125a78a3c2a1d28a4 (patch) | |
tree | 36a05922af22272dc82357ce82be21a3a9214bd0 /kernel/bpf/cpumap.c | |
parent | ecc4946f11a07884f230450a6d5a92337bc21375 (diff) | |
parent | dc4060a5dc2557e6b5aa813bf5b73677299d62d2 (diff) |
BackMerge v5.1-rc5 into drm-next
Need rc5 for udl fix to add udl cleanups on top.
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'kernel/bpf/cpumap.c')
-rw-r--r-- | kernel/bpf/cpumap.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/kernel/bpf/cpumap.c b/kernel/bpf/cpumap.c index 8974b3755670..3c18260403dd 100644 --- a/kernel/bpf/cpumap.c +++ b/kernel/bpf/cpumap.c @@ -162,10 +162,14 @@ static void cpu_map_kthread_stop(struct work_struct *work) static struct sk_buff *cpu_map_build_skb(struct bpf_cpu_map_entry *rcpu, struct xdp_frame *xdpf) { + unsigned int hard_start_headroom; unsigned int frame_size; void *pkt_data_start; struct sk_buff *skb; + /* Part of headroom was reserved to xdpf */ + hard_start_headroom = sizeof(struct xdp_frame) + xdpf->headroom; + /* build_skb need to place skb_shared_info after SKB end, and * also want to know the memory "truesize". Thus, need to * know the memory frame size backing xdp_buff. @@ -183,15 +187,15 @@ static struct sk_buff *cpu_map_build_skb(struct bpf_cpu_map_entry *rcpu, * is not at a fixed memory location, with mixed length * packets, which is bad for cache-line hotness. */ - frame_size = SKB_DATA_ALIGN(xdpf->len + xdpf->headroom) + + frame_size = SKB_DATA_ALIGN(xdpf->len + hard_start_headroom) + SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); - pkt_data_start = xdpf->data - xdpf->headroom; + pkt_data_start = xdpf->data - hard_start_headroom; skb = build_skb(pkt_data_start, frame_size); if (!skb) return NULL; - skb_reserve(skb, xdpf->headroom); + skb_reserve(skb, hard_start_headroom); __skb_put(skb, xdpf->len); if (xdpf->metasize) skb_metadata_set(skb, xdpf->metasize); @@ -205,6 +209,9 @@ static struct sk_buff *cpu_map_build_skb(struct bpf_cpu_map_entry *rcpu, * - RX ring dev queue index (skb_record_rx_queue) */ + /* Allow SKB to reuse area used by xdp_frame */ + xdp_scrub_frame(xdpf); + return skb; } |