Merge branch 'bpf-direct-packet-access-improvements'

Daniel Borkmann says:

====================
BPF direct packet access improvements

This set adds write support to the currently available read support
for {cls,act}_bpf programs. First one is a fix for affected commit
sitting in net-next and prerequisite for the second one, last patch
adds a number of test cases against the verifier. For details, please
see individual patches.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 21 insertions, 0 deletions

diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
index f896dfac4ac0..e07432b9f8b8 100644
--- a/include/uapi/linux/bpf.h
+++ b/include/uapi/linux/bpf.h
@@ -398,6 +398,27 @@ enum bpf_func_id {
 	 */
 	BPF_FUNC_skb_change_tail,
 
+	/**
+	 * bpf_skb_pull_data(skb, len)
+	 * The helper will pull in non-linear data in case the
+	 * skb is non-linear and not all of len are part of the
+	 * linear section. Only needed for read/write with direct
+	 * packet access.
+	 * @skb: pointer to skb
+	 * @len: len to make read/writeable
+	 * Return: 0 on success or negative error
+	 */
+	BPF_FUNC_skb_pull_data,
+
+	/**
+	 * bpf_csum_update(skb, csum)
+	 * Adds csum into skb->csum in case of CHECKSUM_COMPLETE.
+	 * @skb: pointer to skb
+	 * @csum: csum to add
+	 * Return: csum on success or negative error
+	 */
+	BPF_FUNC_csum_update,
+
 	__BPF_FUNC_MAX_ID,
 };