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Message-ID: <1486510635.7793.72.camel@edumazet-glaptop3.roam.corp.google.com>
Date: Tue, 07 Feb 2017 15:37:15 -0800
From: Eric Dumazet <eric.dumazet@...il.com>
To: David Miller <davem@...emloft.net>
Cc: netdev <netdev@...r.kernel.org>
Subject: gro_cells: move to net/core/gro_cells.c
From: Eric Dumazet <edumazet@...gle.com>
We have many gro cells users, so lets move the code to avoid
duplication.
This creates a CONFIG_GRO_CELLS option.
Signed-off-by: Eric Dumazet <edumazet@...gle.com>
---
drivers/net/Kconfig | 3 +
include/net/gro_cells.h | 86 +----------------------------------
net/Kconfig | 4 +
net/core/Makefile | 1
net/core/gro_cells.c | 92 ++++++++++++++++++++++++++++++++++++++
net/ipv4/Kconfig | 1
net/ipv6/Kconfig | 1
net/xfrm/Kconfig | 1
8 files changed, 107 insertions(+), 82 deletions(-)
diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index 95c32f2d7601b9180d43b77e1c143d4988f5..a993cbeb9e0c84326a63369226b14ed00870 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -170,6 +170,7 @@ config VXLAN
tristate "Virtual eXtensible Local Area Network (VXLAN)"
depends on INET
select NET_UDP_TUNNEL
+ select GRO_CELLS
---help---
This allows one to create vxlan virtual interfaces that provide
Layer 2 Networks over Layer 3 Networks. VXLAN is often used
@@ -184,6 +185,7 @@ config GENEVE
tristate "Generic Network Virtualization Encapsulation"
depends on INET && NET_UDP_TUNNEL
select NET_IP_TUNNEL
+ select GRO_CELLS
---help---
This allows one to create geneve virtual interfaces that provide
Layer 2 Networks over Layer 3 Networks. GENEVE is often used
@@ -216,6 +218,7 @@ config MACSEC
select CRYPTO
select CRYPTO_AES
select CRYPTO_GCM
+ select GRO_CELLS
---help---
MACsec is an encryption standard for Ethernet.
diff --git a/include/net/gro_cells.h b/include/net/gro_cells.h
index 2a1abbf8da74368cd01adc40cef6c0644e05..fcaf8f47913054543e97d606518f78eabf06 100644
--- a/include/net/gro_cells.h
+++ b/include/net/gro_cells.h
@@ -5,92 +5,14 @@
#include <linux/slab.h>
#include <linux/netdevice.h>
-struct gro_cell {
- struct sk_buff_head napi_skbs;
- struct napi_struct napi;
-};
+struct gro_cell;
struct gro_cells {
struct gro_cell __percpu *cells;
};
-static inline int gro_cells_receive(struct gro_cells *gcells, struct sk_buff *skb)
-{
- struct gro_cell *cell;
- struct net_device *dev = skb->dev;
-
- if (!gcells->cells || skb_cloned(skb) || !(dev->features & NETIF_F_GRO))
- return netif_rx(skb);
-
- cell = this_cpu_ptr(gcells->cells);
-
- if (skb_queue_len(&cell->napi_skbs) > netdev_max_backlog) {
- atomic_long_inc(&dev->rx_dropped);
- kfree_skb(skb);
- return NET_RX_DROP;
- }
-
- __skb_queue_tail(&cell->napi_skbs, skb);
- if (skb_queue_len(&cell->napi_skbs) == 1)
- napi_schedule(&cell->napi);
- return NET_RX_SUCCESS;
-}
-
-/* called under BH context */
-static inline int gro_cell_poll(struct napi_struct *napi, int budget)
-{
- struct gro_cell *cell = container_of(napi, struct gro_cell, napi);
- struct sk_buff *skb;
- int work_done = 0;
-
- while (work_done < budget) {
- skb = __skb_dequeue(&cell->napi_skbs);
- if (!skb)
- break;
- napi_gro_receive(napi, skb);
- work_done++;
- }
-
- if (work_done < budget)
- napi_complete_done(napi, work_done);
- return work_done;
-}
-
-static inline int gro_cells_init(struct gro_cells *gcells, struct net_device *dev)
-{
- int i;
-
- gcells->cells = alloc_percpu(struct gro_cell);
- if (!gcells->cells)
- return -ENOMEM;
-
- for_each_possible_cpu(i) {
- struct gro_cell *cell = per_cpu_ptr(gcells->cells, i);
-
- __skb_queue_head_init(&cell->napi_skbs);
-
- set_bit(NAPI_STATE_NO_BUSY_POLL, &cell->napi.state);
-
- netif_napi_add(dev, &cell->napi, gro_cell_poll, 64);
- napi_enable(&cell->napi);
- }
- return 0;
-}
-
-static inline void gro_cells_destroy(struct gro_cells *gcells)
-{
- int i;
-
- if (!gcells->cells)
- return;
- for_each_possible_cpu(i) {
- struct gro_cell *cell = per_cpu_ptr(gcells->cells, i);
-
- netif_napi_del(&cell->napi);
- __skb_queue_purge(&cell->napi_skbs);
- }
- free_percpu(gcells->cells);
- gcells->cells = NULL;
-}
+int gro_cells_receive(struct gro_cells *gcells, struct sk_buff *skb);
+int gro_cells_init(struct gro_cells *gcells, struct net_device *dev);
+void gro_cells_destroy(struct gro_cells *gcells);
#endif
diff --git a/net/Kconfig b/net/Kconfig
index 2f2842d2d3edde3f13574923953d4c33aff0..f19c0c3b9589757856502bc91398e6ee17d8 100644
--- a/net/Kconfig
+++ b/net/Kconfig
@@ -413,6 +413,10 @@ config DST_CACHE
bool
default n
+config GRO_CELLS
+ bool
+ default n
+
config NET_DEVLINK
tristate "Network physical/parent device Netlink interface"
help
diff --git a/net/core/Makefile b/net/core/Makefile
index f6761b6e3b29bc4c645585bfdcb38ca94bda..79f9479e965812c635b5337ff89d393a7176 100644
--- a/net/core/Makefile
+++ b/net/core/Makefile
@@ -28,3 +28,4 @@ obj-$(CONFIG_LWTUNNEL_BPF) += lwt_bpf.o
obj-$(CONFIG_DST_CACHE) += dst_cache.o
obj-$(CONFIG_HWBM) += hwbm.o
obj-$(CONFIG_NET_DEVLINK) += devlink.o
+obj-$(CONFIG_GRO_CELLS) += gro_cells.o
diff --git a/net/core/gro_cells.c b/net/core/gro_cells.c
new file mode 100644
index 000000000000000000000000000000000000..c98bbfbd26b8645bb2a273bdee61f285606e
--- /dev/null
+++ b/net/core/gro_cells.c
@@ -0,0 +1,92 @@
+#include <linux/skbuff.h>
+#include <linux/slab.h>
+#include <linux/netdevice.h>
+#include <net/gro_cells.h>
+
+struct gro_cell {
+ struct sk_buff_head napi_skbs;
+ struct napi_struct napi;
+};
+
+int gro_cells_receive(struct gro_cells *gcells, struct sk_buff *skb)
+{
+ struct net_device *dev = skb->dev;
+ struct gro_cell *cell;
+
+ if (!gcells->cells || skb_cloned(skb) || !(dev->features & NETIF_F_GRO))
+ return netif_rx(skb);
+
+ cell = this_cpu_ptr(gcells->cells);
+
+ if (skb_queue_len(&cell->napi_skbs) > netdev_max_backlog) {
+ atomic_long_inc(&dev->rx_dropped);
+ kfree_skb(skb);
+ return NET_RX_DROP;
+ }
+
+ __skb_queue_tail(&cell->napi_skbs, skb);
+ if (skb_queue_len(&cell->napi_skbs) == 1)
+ napi_schedule(&cell->napi);
+ return NET_RX_SUCCESS;
+}
+EXPORT_SYMBOL(gro_cells_receive);
+
+/* called under BH context */
+static int gro_cell_poll(struct napi_struct *napi, int budget)
+{
+ struct gro_cell *cell = container_of(napi, struct gro_cell, napi);
+ struct sk_buff *skb;
+ int work_done = 0;
+
+ while (work_done < budget) {
+ skb = __skb_dequeue(&cell->napi_skbs);
+ if (!skb)
+ break;
+ napi_gro_receive(napi, skb);
+ work_done++;
+ }
+
+ if (work_done < budget)
+ napi_complete_done(napi, work_done);
+ return work_done;
+}
+
+int gro_cells_init(struct gro_cells *gcells, struct net_device *dev)
+{
+ int i;
+
+ gcells->cells = alloc_percpu(struct gro_cell);
+ if (!gcells->cells)
+ return -ENOMEM;
+
+ for_each_possible_cpu(i) {
+ struct gro_cell *cell = per_cpu_ptr(gcells->cells, i);
+
+ __skb_queue_head_init(&cell->napi_skbs);
+
+ set_bit(NAPI_STATE_NO_BUSY_POLL, &cell->napi.state);
+
+ netif_napi_add(dev, &cell->napi, gro_cell_poll,
+ NAPI_POLL_WEIGHT);
+ napi_enable(&cell->napi);
+ }
+ return 0;
+}
+EXPORT_SYMBOL(gro_cells_init);
+
+void gro_cells_destroy(struct gro_cells *gcells)
+{
+ int i;
+
+ if (!gcells->cells)
+ return;
+ for_each_possible_cpu(i) {
+ struct gro_cell *cell = per_cpu_ptr(gcells->cells, i);
+
+ netif_napi_del(&cell->napi);
+ __skb_queue_purge(&cell->napi_skbs);
+ }
+ free_percpu(gcells->cells);
+ gcells->cells = NULL;
+}
+EXPORT_SYMBOL(gro_cells_destroy);
diff --git a/net/ipv4/Kconfig b/net/ipv4/Kconfig
index 6e7baaf814c608b4e222406c42287382d4ee..e30f9caddae8a221c693b97e1b81acff491c 100644
--- a/net/ipv4/Kconfig
+++ b/net/ipv4/Kconfig
@@ -187,6 +187,7 @@ config NET_IPGRE_DEMUX
config NET_IP_TUNNEL
tristate
select DST_CACHE
+ select GRO_CELLS
default n
config NET_IPGRE
diff --git a/net/ipv6/Kconfig b/net/ipv6/Kconfig
index ec1267e2bd1f8c9168687513010cec7a7271..3c7c76b2a7baafc1a67df8c5be2166aafcd9 100644
--- a/net/ipv6/Kconfig
+++ b/net/ipv6/Kconfig
@@ -208,6 +208,7 @@ config IPV6_TUNNEL
tristate "IPv6: IP-in-IPv6 tunnel (RFC2473)"
select INET6_TUNNEL
select DST_CACHE
+ select GRO_CELLS
---help---
Support for IPv6-in-IPv6 and IPv4-in-IPv6 tunnels described in
RFC 2473.
diff --git a/net/xfrm/Kconfig b/net/xfrm/Kconfig
index bda1a13628a8143b812554d0d29fd83cac3a..c06d3997c6e7b11e32d086d015945918468e 100644
--- a/net/xfrm/Kconfig
+++ b/net/xfrm/Kconfig
@@ -4,6 +4,7 @@
config XFRM
bool
depends on NET
+ select GRO_CELLS
config XFRM_ALGO
tristate
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