Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

Fun set of conflict resolutions here...

For the mac80211 stuff, these were fortunately just parallel
adds.  Trivially resolved.

In drivers/net/phy/phy.c we had a bug fix in 'net' that moved the
function phy_disable_interrupts() earlier in the file, whilst in
'net-next' the phy_error() call from this function was removed.

In net/ipv4/xfrm4_policy.c, David Ahern's changes to remove the
'rt_table_id' member of rtable collided with a bug fix in 'net' that
added a new struct member "rt_mtu_locked" which needs to be copied
over here.

The mlxsw driver conflict consisted of net-next separating
the span code and definitions into separate files, whilst
a 'net' bug fix made some changes to that moved code.

The mlx5 infiniband conflict resolution was quite non-trivial,
the RDMA tree's merge commit was used as a guide here, and
here are their notes:

====================

    Due to bug fixes found by the syzkaller bot and taken into the for-rc
    branch after development for the 4.17 merge window had already started
    being taken into the for-next branch, there were fairly non-trivial
    merge issues that would need to be resolved between the for-rc branch
    and the for-next branch.  This merge resolves those conflicts and
    provides a unified base upon which ongoing development for 4.17 can
    be based.

    Conflicts:
            drivers/infiniband/hw/mlx5/main.c - Commit 42cea83f9524
            (IB/mlx5: Fix cleanup order on unload) added to for-rc and
            commit b5ca15ad7e61 (IB/mlx5: Add proper representors support)
            add as part of the devel cycle both needed to modify the
            init/de-init functions used by mlx5.  To support the new
            representors, the new functions added by the cleanup patch
            needed to be made non-static, and the init/de-init list
            added by the representors patch needed to be modified to
            match the init/de-init list changes made by the cleanup
            patch.
    Updates:
            drivers/infiniband/hw/mlx5/mlx5_ib.h - Update function
            prototypes added by representors patch to reflect new function
            names as changed by cleanup patch
            drivers/infiniband/hw/mlx5/ib_rep.c - Update init/de-init
            stage list to match new order from cleanup patch
====================

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

1 files changed, 42 insertions, 18 deletions

diff --git a/net/core/filter.c b/net/core/filter.c
index c86f03fd9ea5..00c711c5f1a2 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -2283,6 +2283,10 @@ static int bpf_skb_proto_4_to_6(struct sk_buff *skb)
 	u32 off = skb_mac_header_len(skb);
 	int ret;
 
+	/* SCTP uses GSO_BY_FRAGS, thus cannot adjust it. */
+	if (skb_is_gso(skb) && unlikely(skb_is_gso_sctp(skb)))
+		return -ENOTSUPP;
+
 	ret = skb_cow(skb, len_diff);
 	if (unlikely(ret < 0))
 		return ret;
@@ -2292,19 +2296,21 @@ static int bpf_skb_proto_4_to_6(struct sk_buff *skb)
 		return ret;
 
 	if (skb_is_gso(skb)) {
+		struct skb_shared_info *shinfo = skb_shinfo(skb);
+
 		/* SKB_GSO_TCPV4 needs to be changed into
 		 * SKB_GSO_TCPV6.
 		 */
-		if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV4) {
-			skb_shinfo(skb)->gso_type &= ~SKB_GSO_TCPV4;
-			skb_shinfo(skb)->gso_type |=  SKB_GSO_TCPV6;
+		if (shinfo->gso_type & SKB_GSO_TCPV4) {
+			shinfo->gso_type &= ~SKB_GSO_TCPV4;
+			shinfo->gso_type |=  SKB_GSO_TCPV6;
 		}
 
 		/* Due to IPv6 header, MSS needs to be downgraded. */
-		skb_shinfo(skb)->gso_size -= len_diff;
+		skb_decrease_gso_size(shinfo, len_diff);
 		/* Header must be checked, and gso_segs recomputed. */
-		skb_shinfo(skb)->gso_type |= SKB_GSO_DODGY;
-		skb_shinfo(skb)->gso_segs = 0;
+		shinfo->gso_type |= SKB_GSO_DODGY;
+		shinfo->gso_segs = 0;
 	}
 
 	skb->protocol = htons(ETH_P_IPV6);
@@ -2319,6 +2325,10 @@ static int bpf_skb_proto_6_to_4(struct sk_buff *skb)
 	u32 off = skb_mac_header_len(skb);
 	int ret;
 
+	/* SCTP uses GSO_BY_FRAGS, thus cannot adjust it. */
+	if (skb_is_gso(skb) && unlikely(skb_is_gso_sctp(skb)))
+		return -ENOTSUPP;
+
 	ret = skb_unclone(skb, GFP_ATOMIC);
 	if (unlikely(ret < 0))
 		return ret;
@@ -2328,19 +2338,21 @@ static int bpf_skb_proto_6_to_4(struct sk_buff *skb)
 		return ret;
 
 	if (skb_is_gso(skb)) {
+		struct skb_shared_info *shinfo = skb_shinfo(skb);
+
 		/* SKB_GSO_TCPV6 needs to be changed into
 		 * SKB_GSO_TCPV4.
 		 */
-		if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6) {
-			skb_shinfo(skb)->gso_type &= ~SKB_GSO_TCPV6;
-			skb_shinfo(skb)->gso_type |=  SKB_GSO_TCPV4;
+		if (shinfo->gso_type & SKB_GSO_TCPV6) {
+			shinfo->gso_type &= ~SKB_GSO_TCPV6;
+			shinfo->gso_type |=  SKB_GSO_TCPV4;
 		}
 
 		/* Due to IPv4 header, MSS can be upgraded. */
-		skb_shinfo(skb)->gso_size += len_diff;
+		skb_increase_gso_size(shinfo, len_diff);
 		/* Header must be checked, and gso_segs recomputed. */
-		skb_shinfo(skb)->gso_type |= SKB_GSO_DODGY;
-		skb_shinfo(skb)->gso_segs = 0;
+		shinfo->gso_type |= SKB_GSO_DODGY;
+		shinfo->gso_segs = 0;
 	}
 
 	skb->protocol = htons(ETH_P_IP);
@@ -2439,6 +2451,10 @@ static int bpf_skb_net_grow(struct sk_buff *skb, u32 len_diff)
 	u32 off = skb_mac_header_len(skb) + bpf_skb_net_base_len(skb);
 	int ret;
 
+	/* SCTP uses GSO_BY_FRAGS, thus cannot adjust it. */
+	if (skb_is_gso(skb) && unlikely(skb_is_gso_sctp(skb)))
+		return -ENOTSUPP;
+
 	ret = skb_cow(skb, len_diff);
 	if (unlikely(ret < 0))
 		return ret;
@@ -2448,11 +2464,13 @@ static int bpf_skb_net_grow(struct sk_buff *skb, u32 len_diff)
 		return ret;
 
 	if (skb_is_gso(skb)) {
+		struct skb_shared_info *shinfo = skb_shinfo(skb);
+
 		/* Due to header grow, MSS needs to be downgraded. */
-		skb_shinfo(skb)->gso_size -= len_diff;
+		skb_decrease_gso_size(shinfo, len_diff);
 		/* Header must be checked, and gso_segs recomputed. */
-		skb_shinfo(skb)->gso_type |= SKB_GSO_DODGY;
-		skb_shinfo(skb)->gso_segs = 0;
+		shinfo->gso_type |= SKB_GSO_DODGY;
+		shinfo->gso_segs = 0;
 	}
 
 	return 0;
@@ -2463,6 +2481,10 @@ static int bpf_skb_net_shrink(struct sk_buff *skb, u32 len_diff)
 	u32 off = skb_mac_header_len(skb) + bpf_skb_net_base_len(skb);
 	int ret;
 
+	/* SCTP uses GSO_BY_FRAGS, thus cannot adjust it. */
+	if (skb_is_gso(skb) && unlikely(skb_is_gso_sctp(skb)))
+		return -ENOTSUPP;
+
 	ret = skb_unclone(skb, GFP_ATOMIC);
 	if (unlikely(ret < 0))
 		return ret;
@@ -2472,11 +2494,13 @@ static int bpf_skb_net_shrink(struct sk_buff *skb, u32 len_diff)
 		return ret;
 
 	if (skb_is_gso(skb)) {
+		struct skb_shared_info *shinfo = skb_shinfo(skb);
+
 		/* Due to header shrink, MSS can be upgraded. */
-		skb_shinfo(skb)->gso_size += len_diff;
+		skb_increase_gso_size(shinfo, len_diff);
 		/* Header must be checked, and gso_segs recomputed. */
-		skb_shinfo(skb)->gso_type |= SKB_GSO_DODGY;
-		skb_shinfo(skb)->gso_segs = 0;
+		shinfo->gso_type |= SKB_GSO_DODGY;
+		shinfo->gso_segs = 0;
 	}
 
 	return 0;