Merge tag 'v7.0-rc3' into next

Sync up with the mainline to brig up the latest changes, specifically
changes to ALPS driver.

1 files changed, 94 insertions, 3 deletions

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index a7cc3d1f4fd1..daa4e4944ce3 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -2813,6 +2813,7 @@ static inline void *__skb_push(struct sk_buff *skb, unsigned int len)
 	DEBUG_NET_WARN_ON_ONCE(len > INT_MAX);
 
 	skb->data -= len;
+	DEBUG_NET_WARN_ON_ONCE(skb->data < skb->head);
 	skb->len  += len;
 	return skb->data;
 }
@@ -3778,8 +3779,8 @@ static inline dma_addr_t __skb_frag_dma_map(struct device *dev,
 					    enum dma_data_direction dir)
 {
 	if (skb_frag_is_net_iov(frag)) {
-		return netmem_to_net_iov(frag->netmem)->dma_addr + offset +
-		       frag->offset;
+		return netmem_to_net_iov(frag->netmem)->desc.dma_addr +
+		       offset + frag->offset;
 	}
 	return dma_map_page(dev, skb_frag_page(frag),
 			    skb_frag_off(frag) + offset, size, dir);
@@ -4301,6 +4302,18 @@ skb_header_pointer(const struct sk_buff *skb, int offset, int len, void *buffer)
 				    skb_headlen(skb), buffer);
 }
 
+/* Variant of skb_header_pointer() where @offset is user-controlled
+ * and potentially negative.
+ */
+static inline void * __must_check
+skb_header_pointer_careful(const struct sk_buff *skb, int offset,
+			   int len, void *buffer)
+{
+	if (unlikely(offset < 0 && -offset > skb_headroom(skb)))
+		return NULL;
+	return skb_header_pointer(skb, offset, len, buffer);
+}
+
 static inline void * __must_check
 skb_pointer_if_linear(const struct sk_buff *skb, int offset, int len)
 {
@@ -4564,6 +4577,81 @@ static inline void skb_metadata_clear(struct sk_buff *skb)
 	skb_metadata_set(skb, 0);
 }
 
+/**
+ * skb_data_move - Move packet data and metadata after skb_push() or skb_pull().
+ * @skb: packet to operate on
+ * @len: number of bytes pushed or pulled from &sk_buff->data
+ * @n: number of bytes to memmove() from pre-push/pull &sk_buff->data
+ *
+ * Moves @n bytes of packet data, can be zero, and all bytes of skb metadata.
+ *
+ * Assumes metadata is located immediately before &sk_buff->data prior to the
+ * push/pull, and that sufficient headroom exists to hold it after an
+ * skb_push(). Otherwise, metadata is cleared and a one-time warning is issued.
+ *
+ * Prefer skb_postpull_data_move() or skb_postpush_data_move() to calling this
+ * helper directly.
+ */
+static inline void skb_data_move(struct sk_buff *skb, const int len,
+				 const unsigned int n)
+{
+	const u8 meta_len = skb_metadata_len(skb);
+	u8 *meta, *meta_end;
+
+	if (!len || (!n && !meta_len))
+		return;
+
+	if (!meta_len)
+		goto no_metadata;
+
+	meta_end = skb_metadata_end(skb);
+	meta = meta_end - meta_len;
+
+	if (WARN_ON_ONCE(meta_end + len != skb->data ||
+			 meta_len > skb_headroom(skb))) {
+		skb_metadata_clear(skb);
+		goto no_metadata;
+	}
+
+	memmove(meta + len, meta, meta_len + n);
+	return;
+
+no_metadata:
+	memmove(skb->data, skb->data - len, n);
+}
+
+/**
+ * skb_postpull_data_move - Move packet data and metadata after skb_pull().
+ * @skb: packet to operate on
+ * @len: number of bytes pulled from &sk_buff->data
+ * @n: number of bytes to memmove() from pre-pull &sk_buff->data
+ *
+ * See skb_data_move() for details.
+ */
+static inline void skb_postpull_data_move(struct sk_buff *skb,
+					  const unsigned int len,
+					  const unsigned int n)
+{
+	DEBUG_NET_WARN_ON_ONCE(len > INT_MAX);
+	skb_data_move(skb, len, n);
+}
+
+/**
+ * skb_postpush_data_move - Move packet data and metadata after skb_push().
+ * @skb: packet to operate on
+ * @len: number of bytes pushed onto &sk_buff->data
+ * @n: number of bytes to memmove() from pre-push &sk_buff->data
+ *
+ * See skb_data_move() for details.
+ */
+static inline void skb_postpush_data_move(struct sk_buff *skb,
+					  const unsigned int len,
+					  const unsigned int n)
+{
+	DEBUG_NET_WARN_ON_ONCE(len > INT_MAX);
+	skb_data_move(skb, -len, n);
+}
+
 struct sk_buff *skb_clone_sk(struct sk_buff *skb);
 
 #ifdef CONFIG_NETWORK_PHY_TIMESTAMPING
@@ -4688,7 +4776,7 @@ static inline void __skb_decr_checksum_unnecessary(struct sk_buff *skb)
 	}
 }
 
-static inline void __skb_incr_checksum_unnecessary(struct sk_buff *skb)
+static __always_inline void __skb_incr_checksum_unnecessary(struct sk_buff *skb)
 {
 	if (skb->ip_summed == CHECKSUM_UNNECESSARY) {
 		if (skb->csum_level < SKB_MAX_CSUM_LEVEL)
@@ -4914,6 +5002,9 @@ enum skb_ext_id {
 #if IS_ENABLED(CONFIG_INET_PSP)
 	SKB_EXT_PSP,
 #endif
+#if IS_ENABLED(CONFIG_CAN)
+	SKB_EXT_CAN,
+#endif
 	SKB_EXT_NUM, /* must be last */
 };