netdev - [PATCH net-next v2 1/3] net: make napi_frag_unref reuse skb_page

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Date: Wed, 27 Mar 2024 14:45:19 -0700
From: Mina Almasry <almasrymina@...gle.com>
To: netdev@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-rdma@...r.kernel.org
Cc: Mina Almasry <almasrymina@...gle.com>, Ayush Sawal <ayush.sawal@...lsio.com>, 
	"David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
	Mirko Lindner <mlindner@...vell.com>, Stephen Hemminger <stephen@...workplumber.org>, 
	Tariq Toukan <tariqt@...dia.com>, Steffen Klassert <steffen.klassert@...unet.com>, 
	Herbert Xu <herbert@...dor.apana.org.au>, David Ahern <dsahern@...nel.org>, 
	Boris Pismenny <borisp@...dia.com>, John Fastabend <john.fastabend@...il.com>, 
	Dragos Tatulea <dtatulea@...dia.com>
Subject: [PATCH net-next v2 1/3] net: make napi_frag_unref reuse skb_page_unref

The implementations of these 2 functions are almost identical. Remove
the implementation of napi_frag_unref, and make it a call into
skb_page_unref so we don't duplicate the implementation.

Signed-off-by: Mina Almasry <almasrymina@...gle.com>

---
 include/linux/skbuff.h | 12 +++---------
 net/ipv4/esp4.c        |  2 +-
 net/ipv6/esp6.c        |  2 +-
 3 files changed, 5 insertions(+), 11 deletions(-)

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index b945af8a6208..bafa5c9ff59a 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -3524,10 +3524,10 @@ int skb_cow_data_for_xdp(struct page_pool *pool, struct sk_buff **pskb,
 bool napi_pp_put_page(struct page *page, bool napi_safe);
 
 static inline void
-skb_page_unref(const struct sk_buff *skb, struct page *page, bool napi_safe)
+skb_page_unref(struct page *page, bool recycle, bool napi_safe)
 {
 #ifdef CONFIG_PAGE_POOL
-	if (skb->pp_recycle && napi_pp_put_page(page, napi_safe))
+	if (recycle && napi_pp_put_page(page, napi_safe))
 		return;
 #endif
 	put_page(page);
@@ -3536,13 +3536,7 @@ skb_page_unref(const struct sk_buff *skb, struct page *page, bool napi_safe)
 static inline void
 napi_frag_unref(skb_frag_t *frag, bool recycle, bool napi_safe)
 {
-	struct page *page = skb_frag_page(frag);
-
-#ifdef CONFIG_PAGE_POOL
-	if (recycle && napi_pp_put_page(page, napi_safe))
-		return;
-#endif
-	put_page(page);
+	skb_page_unref(skb_frag_page(frag), recycle, napi_safe);
 }
 
 /**
diff --git a/net/ipv4/esp4.c b/net/ipv4/esp4.c
index d33d12421814..3d2c252c5570 100644
--- a/net/ipv4/esp4.c
+++ b/net/ipv4/esp4.c
@@ -114,7 +114,7 @@ static void esp_ssg_unref(struct xfrm_state *x, void *tmp, struct sk_buff *skb)
 	 */
 	if (req->src != req->dst)
 		for (sg = sg_next(req->src); sg; sg = sg_next(sg))
-			skb_page_unref(skb, sg_page(sg), false);
+			skb_page_unref(sg_page(sg), skb->pp_recycle, false);
 }
 
 #ifdef CONFIG_INET_ESPINTCP
diff --git a/net/ipv6/esp6.c b/net/ipv6/esp6.c
index 7371886d4f9f..4fe4f97f5420 100644
--- a/net/ipv6/esp6.c
+++ b/net/ipv6/esp6.c
@@ -131,7 +131,7 @@ static void esp_ssg_unref(struct xfrm_state *x, void *tmp, struct sk_buff *skb)
 	 */
 	if (req->src != req->dst)
 		for (sg = sg_next(req->src); sg; sg = sg_next(sg))
-			skb_page_unref(skb, sg_page(sg), false);
+			skb_page_unref(sg_page(sg), skb->pp_recycle, false);
 }
 
 #ifdef CONFIG_INET6_ESPINTCP
-- 
2.44.0.396.g6e790dbe36-goog