netdev - [PATCH net-next v5 1/3] net: make napi_frag_unref reuse skb_page

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Message-ID: <20240408153000.2152844-2-almasrymina@google.com>
Date: Mon,  8 Apr 2024 08:29:56 -0700
From: Mina Almasry <almasrymina@...gle.com>
To: netdev@...r.kernel.org, linux-kernel@...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>, 
	Jesper Dangaard Brouer <hawk@...nel.org>, Ilias Apalodimas <ilias.apalodimas@...aro.org>, 
	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 v5 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>
Reviewed-by: Eric Dumazet <edumazet@...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 7dfb906d92f7..c0ff85bb087a 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -3522,10 +3522,10 @@ int skb_cow_data_for_xdp(struct page_pool *pool, struct sk_buff **pskb,
 bool napi_pp_put_page(struct page *page);
 
 static inline void
-skb_page_unref(const struct sk_buff *skb, struct page *page)
+skb_page_unref(struct page *page, bool recycle)
 {
 #ifdef CONFIG_PAGE_POOL
-	if (skb->pp_recycle && napi_pp_put_page(page))
+	if (recycle && napi_pp_put_page(page))
 		return;
 #endif
 	put_page(page);
@@ -3534,13 +3534,7 @@ skb_page_unref(const struct sk_buff *skb, struct page *page)
 static inline void
 napi_frag_unref(skb_frag_t *frag, bool recycle)
 {
-	struct page *page = skb_frag_page(frag);
-
-#ifdef CONFIG_PAGE_POOL
-	if (recycle && napi_pp_put_page(page))
-		return;
-#endif
-	put_page(page);
+	skb_page_unref(skb_frag_page(frag), recycle);
 }
 
 /**
diff --git a/net/ipv4/esp4.c b/net/ipv4/esp4.c
index 3d647c9a7a21..40330253f076 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));
+			skb_page_unref(sg_page(sg), skb->pp_recycle);
 }
 
 #ifdef CONFIG_INET_ESPINTCP
diff --git a/net/ipv6/esp6.c b/net/ipv6/esp6.c
index fe8d53f5a5ee..fb431d0a3475 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));
+			skb_page_unref(sg_page(sg), skb->pp_recycle);
 }
 
 #ifdef CONFIG_INET6_ESPINTCP
-- 
2.44.0.478.gd926399ef9-goog