On Monday 10 April 2006 08:45, David S. Miller wrote:
> From: Denis Vlasenko <[email protected]>
> Date: Mon, 10 Apr 2006 08:28:20 +0300
>
> > IOW: shouldn't calls to these functions sit in
> > #if defined(CONFIG_VLAN_8021Q) || defined (CONFIG_VLAN_8021Q_MODULE)
> > block? For example, typhoon.c:
> >
> > spin_lock(&tp->state_lock);
> > +#if defined(CONFIG_VLAN_8021Q) || defined (CONFIG_VLAN_8021Q_MODULE)
> > if(tp->vlgrp != NULL && rx->rxStatus & TYPHOON_RX_VLAN)
> > vlan_hwaccel_receive_skb(new_skb, tp->vlgrp,
> > ntohl(rx->vlanTag) & 0xffff);
> > else
> > +#endif
> > netif_receive_skb(new_skb);
> > spin_unlock(&tp->state_lock);
> >
> > Same for s2io.c, chelsio/sge.c, etc...
>
> Very likely yes. tp->vlgrp will never be non-NULL in such situations
> so it's not a correctness issue, but rather an optimization :-)
Done. Please see attached.
Deinline a few functions which produce 150+ bytes of code.
They are moved into new file, net/core/dev_vlan.c, which
is compiled to nothing if VLAN support is not enabled at all
(even as a module).
A few drivers which were trying to call vlan routines
on non-vlan-enabled kernel are fixed.
Compile tested (allyesconfig + "# CONFIG_VLAN_8021Q is not set").
Signed-off-by: Denis Vlasenko <[email protected]>
--
vda
# size vmlinux.org vmlinux.new
text data bss dec hex filename
20477010 6152182 1729804 28358996 1b0b954 vmlinux.org
20472545 6152150 1729804 28354499 1b0a7c3 vmlinux.new
diff -urpN linux-2.6.16.1.org/drivers/net/bnx2.c linux-2.6.16.1.vlan/drivers/net/bnx2.c
--- linux-2.6.16.1.org/drivers/net/bnx2.c Mon Mar 20 07:53:29 2006
+++ linux-2.6.16.1.vlan/drivers/net/bnx2.c Mon Apr 10 16:01:01 2006
@@ -4436,10 +4436,13 @@ bnx2_start_xmit(struct sk_buff *skb, str
vlan_tag_flags |= TX_BD_FLAGS_TCP_UDP_CKSUM;
}
+#ifdef BCM_VLAN
if (bp->vlgrp != 0 && vlan_tx_tag_present(skb)) {
vlan_tag_flags |=
(TX_BD_FLAGS_VLAN_TAG | (vlan_tx_tag_get(skb) << 16));
}
+#endif
+
#ifdef BCM_TSO
if ((mss = skb_shinfo(skb)->tso_size) &&
(skb->len > (bp->dev->mtu + ETH_HLEN))) {
diff -urpN linux-2.6.16.1.org/drivers/net/bnx2.h linux-2.6.16.1.vlan/drivers/net/bnx2.h
--- linux-2.6.16.1.org/drivers/net/bnx2.h Mon Mar 20 07:53:29 2006
+++ linux-2.6.16.1.vlan/drivers/net/bnx2.h Mon Apr 10 16:01:01 2006
@@ -40,7 +40,9 @@
#include <linux/mii.h>
#ifdef NETIF_F_HW_VLAN_TX
#include <linux/if_vlan.h>
+#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
#define BCM_VLAN 1
+#endif
#endif
#ifdef NETIF_F_TSO
#include <net/ip.h>
diff -urpN linux-2.6.16.1.org/drivers/net/bonding/bond_alb.c linux-2.6.16.1.vlan/drivers/net/bonding/bond_alb.c
--- linux-2.6.16.1.org/drivers/net/bonding/bond_alb.c Mon Mar 20 07:53:29 2006
+++ linux-2.6.16.1.vlan/drivers/net/bonding/bond_alb.c Mon Apr 10 16:01:01 2006
@@ -502,6 +502,7 @@ static void rlb_update_client(struct rlb
skb->dev = client_info->slave->dev;
+#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
if (client_info->tag) {
skb = vlan_put_tag(skb, client_info->vlan_id);
if (!skb) {
@@ -511,7 +512,7 @@ static void rlb_update_client(struct rlb
continue;
}
}
-
+#endif
arp_xmit(skb);
}
}
@@ -870,7 +871,9 @@ static void rlb_clear_vlan(struct bondin
static void alb_send_learning_packets(struct slave *slave, u8 mac_addr[])
{
+#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
struct bonding *bond = bond_get_bond_by_slave(slave);
+#endif
struct learning_pkt pkt;
int size = sizeof(struct learning_pkt);
int i;
@@ -898,6 +901,7 @@ static void alb_send_learning_packets(st
skb->priority = TC_PRIO_CONTROL;
skb->dev = slave->dev;
+#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
if (!list_empty(&bond->vlan_list)) {
struct vlan_entry *vlan;
@@ -918,7 +922,7 @@ static void alb_send_learning_packets(st
continue;
}
}
-
+#endif
dev_queue_xmit(skb);
}
}
diff -urpN linux-2.6.16.1.org/drivers/net/bonding/bond_main.c linux-2.6.16.1.vlan/drivers/net/bonding/bond_main.c
--- linux-2.6.16.1.org/drivers/net/bonding/bond_main.c Mon Mar 20 07:53:29 2006
+++ linux-2.6.16.1.vlan/drivers/net/bonding/bond_main.c Mon Apr 10 16:01:01 2006
@@ -366,6 +366,7 @@ struct vlan_entry *bond_next_vlan(struct
*/
int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev)
{
+#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
unsigned short vlan_id;
if (!list_empty(&bond->vlan_list) &&
@@ -380,9 +381,9 @@ int bond_dev_queue_xmit(struct bonding *
*/
return 0;
}
- } else {
+ } else
+#endif
skb->dev = slave_dev;
- }
skb->priority = 1;
dev_queue_xmit(skb);
@@ -2270,6 +2271,7 @@ static void bond_arp_send(struct net_dev
printk(KERN_ERR DRV_NAME ": ARP packet allocation failed\n");
return;
}
+#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
if (vlan_id) {
skb = vlan_put_tag(skb, vlan_id);
if (!skb) {
@@ -2277,6 +2279,7 @@ static void bond_arp_send(struct net_dev
return;
}
}
+#endif
arp_xmit(skb);
}
diff -urpN linux-2.6.16.1.org/drivers/net/chelsio/sge.c linux-2.6.16.1.vlan/drivers/net/chelsio/sge.c
--- linux-2.6.16.1.org/drivers/net/chelsio/sge.c Mon Mar 20 07:53:29 2006
+++ linux-2.6.16.1.vlan/drivers/net/chelsio/sge.c Mon Apr 10 16:01:01 2006
@@ -978,6 +978,7 @@ static int sge_rx(struct sge *sge, struc
} else
skb->ip_summed = CHECKSUM_NONE;
+#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
if (unlikely(adapter->vlan_grp && p->vlan_valid)) {
sge->port_stats[p->iff].vlan_xtract++;
if (adapter->params.sge.polling)
@@ -986,7 +987,9 @@ static int sge_rx(struct sge *sge, struc
else
vlan_hwaccel_rx(skb, adapter->vlan_grp,
ntohs(p->vlan));
- } else if (adapter->params.sge.polling)
+ } else
+#endif
+ if (adapter->params.sge.polling)
netif_receive_skb(skb);
else
netif_rx(skb);
diff -urpN linux-2.6.16.1.org/drivers/net/e1000/e1000_main.c linux-2.6.16.1.vlan/drivers/net/e1000/e1000_main.c
--- linux-2.6.16.1.org/drivers/net/e1000/e1000_main.c Mon Mar 20 07:53:29 2006
+++ linux-2.6.16.1.vlan/drivers/net/e1000/e1000_main.c Mon Apr 10 16:01:01 2006
@@ -3714,23 +3714,25 @@ e1000_clean_rx_irq(struct e1000_adapter
skb->protocol = eth_type_trans(skb, netdev);
#ifdef CONFIG_E1000_NAPI
+#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
if (unlikely(adapter->vlgrp &&
(status & E1000_RXD_STAT_VP))) {
vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
le16_to_cpu(rx_desc->special) &
E1000_RXD_SPC_VLAN_MASK);
- } else {
+ } else
+#endif
netif_receive_skb(skb);
- }
#else /* CONFIG_E1000_NAPI */
+#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
if (unlikely(adapter->vlgrp &&
(status & E1000_RXD_STAT_VP))) {
vlan_hwaccel_rx(skb, adapter->vlgrp,
le16_to_cpu(rx_desc->special) &
E1000_RXD_SPC_VLAN_MASK);
- } else {
+ } else
+#endif
netif_rx(skb);
- }
#endif /* CONFIG_E1000_NAPI */
netdev->last_rx = jiffies;
#ifdef CONFIG_E1000_MQ
@@ -3861,21 +3863,23 @@ e1000_clean_rx_irq_ps(struct e1000_adapt
cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP)))
adapter->rx_hdr_split++;
#ifdef CONFIG_E1000_NAPI
+#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
le16_to_cpu(rx_desc->wb.middle.vlan) &
E1000_RXD_SPC_VLAN_MASK);
- } else {
+ } else
+#endif
netif_receive_skb(skb);
- }
#else /* CONFIG_E1000_NAPI */
+#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
vlan_hwaccel_rx(skb, adapter->vlgrp,
le16_to_cpu(rx_desc->wb.middle.vlan) &
E1000_RXD_SPC_VLAN_MASK);
- } else {
+ } else
+#endif
netif_rx(skb);
- }
#endif /* CONFIG_E1000_NAPI */
netdev->last_rx = jiffies;
#ifdef CONFIG_E1000_MQ
diff -urpN linux-2.6.16.1.org/drivers/net/ixgb/ixgb_main.c linux-2.6.16.1.vlan/drivers/net/ixgb/ixgb_main.c
--- linux-2.6.16.1.org/drivers/net/ixgb/ixgb_main.c Mon Mar 20 07:53:29 2006
+++ linux-2.6.16.1.vlan/drivers/net/ixgb/ixgb_main.c Mon Apr 10 16:01:01 2006
@@ -1905,21 +1905,23 @@ ixgb_clean_rx_irq(struct ixgb_adapter *a
skb->protocol = eth_type_trans(skb, netdev);
#ifdef CONFIG_IXGB_NAPI
+#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
if(adapter->vlgrp && (status & IXGB_RX_DESC_STATUS_VP)) {
vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
le16_to_cpu(rx_desc->special) &
IXGB_RX_DESC_SPECIAL_VLAN_MASK);
- } else {
+ } else
+#endif
netif_receive_skb(skb);
- }
#else /* CONFIG_IXGB_NAPI */
+#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
if(adapter->vlgrp && (status & IXGB_RX_DESC_STATUS_VP)) {
vlan_hwaccel_rx(skb, adapter->vlgrp,
le16_to_cpu(rx_desc->special) &
IXGB_RX_DESC_SPECIAL_VLAN_MASK);
- } else {
+ } else
+#endif
netif_rx(skb);
- }
#endif /* CONFIG_IXGB_NAPI */
netdev->last_rx = jiffies;
diff -urpN linux-2.6.16.1.org/drivers/net/s2io.c linux-2.6.16.1.vlan/drivers/net/s2io.c
--- linux-2.6.16.1.org/drivers/net/s2io.c Mon Mar 20 07:53:29 2006
+++ linux-2.6.16.1.vlan/drivers/net/s2io.c Mon Apr 10 16:01:01 2006
@@ -5680,21 +5680,23 @@ static int rx_osm_handler(ring_info_t *r
skb->protocol = eth_type_trans(skb, dev);
#ifdef CONFIG_S2IO_NAPI
+#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
if (sp->vlgrp && RXD_GET_VLAN_TAG(rxdp->Control_2)) {
/* Queueing the vlan frame to the upper layer */
vlan_hwaccel_receive_skb(skb, sp->vlgrp,
RXD_GET_VLAN_TAG(rxdp->Control_2));
- } else {
+ } else
+#endif
netif_receive_skb(skb);
- }
#else
+#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
if (sp->vlgrp && RXD_GET_VLAN_TAG(rxdp->Control_2)) {
/* Queueing the vlan frame to the upper layer */
vlan_hwaccel_rx(skb, sp->vlgrp,
RXD_GET_VLAN_TAG(rxdp->Control_2));
- } else {
+ } else
+#endif
netif_rx(skb);
- }
#endif
dev->last_rx = jiffies;
atomic_dec(&sp->rx_bufs_left[ring_no]);
diff -urpN linux-2.6.16.1.org/drivers/net/typhoon.c linux-2.6.16.1.vlan/drivers/net/typhoon.c
--- linux-2.6.16.1.org/drivers/net/typhoon.c Mon Mar 20 07:53:29 2006
+++ linux-2.6.16.1.vlan/drivers/net/typhoon.c Mon Apr 10 16:01:01 2006
@@ -1745,10 +1745,12 @@ typhoon_rx(struct typhoon *tp, struct ba
new_skb->ip_summed = CHECKSUM_NONE;
spin_lock(&tp->state_lock);
+#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
if(tp->vlgrp != NULL && rx->rxStatus & TYPHOON_RX_VLAN)
vlan_hwaccel_receive_skb(new_skb, tp->vlgrp,
ntohl(rx->vlanTag) & 0xffff);
else
+#endif
netif_receive_skb(new_skb);
spin_unlock(&tp->state_lock);
diff -urpN linux-2.6.16.1.org/include/linux/if_vlan.h linux-2.6.16.1.vlan/include/linux/if_vlan.h
--- linux-2.6.16.1.org/include/linux/if_vlan.h Mon Mar 20 07:53:29 2006
+++ linux-2.6.16.1.vlan/include/linux/if_vlan.h Mon Apr 10 16:01:01 2006
@@ -149,49 +149,9 @@ struct vlan_skb_tx_cookie {
#define vlan_tx_tag_get(__skb) (VLAN_TX_SKB_CB(__skb)->vlan_tag)
/* VLAN rx hw acceleration helper. This acts like netif_{rx,receive_skb}(). */
-static inline int __vlan_hwaccel_rx(struct sk_buff *skb,
+int __vlan_hwaccel_rx(struct sk_buff *skb,
struct vlan_group *grp,
- unsigned short vlan_tag, int polling)
-{
- struct net_device_stats *stats;
-
- skb->dev = grp->vlan_devices[vlan_tag & VLAN_VID_MASK];
- if (skb->dev == NULL) {
- dev_kfree_skb_any(skb);
-
- /* Not NET_RX_DROP, this is not being dropped
- * due to congestion.
- */
- return 0;
- }
-
- skb->dev->last_rx = jiffies;
-
- stats = vlan_dev_get_stats(skb->dev);
- stats->rx_packets++;
- stats->rx_bytes += skb->len;
-
- skb->priority = vlan_get_ingress_priority(skb->dev, vlan_tag);
- switch (skb->pkt_type) {
- case PACKET_BROADCAST:
- break;
-
- case PACKET_MULTICAST:
- stats->multicast++;
- break;
-
- case PACKET_OTHERHOST:
- /* Our lower layer thinks this is not local, let's make sure.
- * This allows the VLAN to have a different MAC than the underlying
- * device, and still route correctly.
- */
- if (!memcmp(eth_hdr(skb)->h_dest, skb->dev->dev_addr, ETH_ALEN))
- skb->pkt_type = PACKET_HOST;
- break;
- };
-
- return (polling ? netif_receive_skb(skb) : netif_rx(skb));
-}
+ unsigned short vlan_tag, int polling);
static inline int vlan_hwaccel_rx(struct sk_buff *skb,
struct vlan_group *grp,
@@ -218,43 +178,7 @@ static inline int vlan_hwaccel_receive_s
* Following the skb_unshare() example, in case of error, the calling function
* doesn't have to worry about freeing the original skb.
*/
-static inline struct sk_buff *__vlan_put_tag(struct sk_buff *skb, unsigned short tag)
-{
- struct vlan_ethhdr *veth;
-
- if (skb_headroom(skb) < VLAN_HLEN) {
- struct sk_buff *sk_tmp = skb;
- skb = skb_realloc_headroom(sk_tmp, VLAN_HLEN);
- kfree_skb(sk_tmp);
- if (!skb) {
- printk(KERN_ERR "vlan: failed to realloc headroom\n");
- return NULL;
- }
- } else {
- skb = skb_unshare(skb, GFP_ATOMIC);
- if (!skb) {
- printk(KERN_ERR "vlan: failed to unshare skbuff\n");
- return NULL;
- }
- }
-
- veth = (struct vlan_ethhdr *)skb_push(skb, VLAN_HLEN);
-
- /* Move the mac addresses to the beginning of the new header. */
- memmove(skb->data, skb->data + VLAN_HLEN, 2 * VLAN_ETH_ALEN);
-
- /* first, the ethernet type */
- veth->h_vlan_proto = __constant_htons(ETH_P_8021Q);
-
- /* now, the tag */
- veth->h_vlan_TCI = htons(tag);
-
- skb->protocol = __constant_htons(ETH_P_8021Q);
- skb->mac.raw -= VLAN_HLEN;
- skb->nh.raw -= VLAN_HLEN;
-
- return skb;
-}
+struct sk_buff *__vlan_put_tag(struct sk_buff *skb, unsigned short tag);
/**
* __vlan_hwaccel_put_tag - hardware accelerated VLAN inserting
diff -urpN linux-2.6.16.1.org/net/core/Makefile linux-2.6.16.1.vlan/net/core/Makefile
--- linux-2.6.16.1.org/net/core/Makefile Mon Mar 20 07:53:29 2006
+++ linux-2.6.16.1.vlan/net/core/Makefile Mon Apr 10 16:01:01 2006
@@ -7,7 +7,7 @@ obj-y := sock.o request_sock.o skbuff.o
obj-$(CONFIG_SYSCTL) += sysctl_net_core.o
-obj-y += dev.o ethtool.o dev_mcast.o dst.o \
+obj-y += dev.o ethtool.o dev_mcast.o dev_vlan.o dst.o \
neighbour.o rtnetlink.o utils.o link_watch.o filter.o
obj-$(CONFIG_XFRM) += flow.o
diff -urpN linux-2.6.16.1.org/net/core/dev_vlan.c linux-2.6.16.1.vlan/net/core/dev_vlan.c
--- linux-2.6.16.1.org/net/core/dev_vlan.c Thu Jan 1 03:00:00 1970
+++ linux-2.6.16.1.vlan/net/core/dev_vlan.c Mon Apr 10 16:01:01 2006
@@ -0,0 +1,110 @@
+/* 802.1q helpers.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#if defined(CONFIG_VLAN_8021Q) || defined (CONFIG_VLAN_8021Q_MODULE)
+
+#include <linux/skbuff.h>
+#include <linux/if_vlan.h>
+
+/* VLAN rx hw acceleration helper. This acts like netif_{rx,receive_skb}(). */
+int __vlan_hwaccel_rx(struct sk_buff *skb,
+ struct vlan_group *grp,
+ unsigned short vlan_tag, int polling)
+{
+ struct net_device_stats *stats;
+
+ skb->dev = grp->vlan_devices[vlan_tag & VLAN_VID_MASK];
+ if (skb->dev == NULL) {
+ dev_kfree_skb_any(skb);
+
+ /* Not NET_RX_DROP, this is not being dropped
+ * due to congestion.
+ */
+ return 0;
+ }
+
+ skb->dev->last_rx = jiffies;
+
+ stats = vlan_dev_get_stats(skb->dev);
+ stats->rx_packets++;
+ stats->rx_bytes += skb->len;
+
+ skb->priority = vlan_get_ingress_priority(skb->dev, vlan_tag);
+ switch (skb->pkt_type) {
+ case PACKET_BROADCAST:
+ break;
+
+ case PACKET_MULTICAST:
+ stats->multicast++;
+ break;
+
+ case PACKET_OTHERHOST:
+ /* Our lower layer thinks this is not local, let's make sure.
+ * This allows the VLAN to have a different MAC than the underlying
+ * device, and still route correctly.
+ */
+ if (!memcmp(eth_hdr(skb)->h_dest, skb->dev->dev_addr, ETH_ALEN))
+ skb->pkt_type = PACKET_HOST;
+ break;
+ };
+
+ return (polling ? netif_receive_skb(skb) : netif_rx(skb));
+}
+EXPORT_SYMBOL(__vlan_hwaccel_rx);
+
+/**
+ * __vlan_put_tag - regular VLAN tag inserting
+ * @skb: skbuff to tag
+ * @tag: VLAN tag to insert
+ *
+ * Inserts the VLAN tag into @skb as part of the payload
+ * Returns a VLAN tagged skb. If a new skb is created, @skb is freed.
+ *
+ * Following the skb_unshare() example, in case of error, the calling function
+ * doesn't have to worry about freeing the original skb.
+ */
+struct sk_buff *__vlan_put_tag(struct sk_buff *skb, unsigned short tag)
+{
+ struct vlan_ethhdr *veth;
+
+ if (skb_headroom(skb) < VLAN_HLEN) {
+ struct sk_buff *sk_tmp = skb;
+ skb = skb_realloc_headroom(sk_tmp, VLAN_HLEN);
+ kfree_skb(sk_tmp);
+ if (!skb) {
+ printk(KERN_ERR "vlan: failed to realloc headroom\n");
+ return NULL;
+ }
+ } else {
+ skb = skb_unshare(skb, GFP_ATOMIC);
+ if (!skb) {
+ printk(KERN_ERR "vlan: failed to unshare skbuff\n");
+ return NULL;
+ }
+ }
+
+ veth = (struct vlan_ethhdr *)skb_push(skb, VLAN_HLEN);
+
+ /* Move the mac addresses to the beginning of the new header. */
+ memmove(skb->data, skb->data + VLAN_HLEN, 2 * VLAN_ETH_ALEN);
+
+ /* first, the ethernet type */
+ veth->h_vlan_proto = __constant_htons(ETH_P_8021Q);
+
+ /* now, the tag */
+ veth->h_vlan_TCI = htons(tag);
+
+ skb->protocol = __constant_htons(ETH_P_8021Q);
+ skb->mac.raw -= VLAN_HLEN;
+ skb->nh.raw -= VLAN_HLEN;
+
+ return skb;
+}
+EXPORT_SYMBOL(__vlan_put_tag);
+
+#endif
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