dst.c (42249094f79422fbf5ed4b54eeb48ff096809b8f) dst.c (aad88724c9d54acb1a9737cb6069d8470fa85f74)
1/*
2 * net/core/dst.c Protocol independent destination cache.
3 *
4 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
5 *
6 */
7
8#include <linux/bitops.h>

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137 expires = round_jiffies_relative(expires);
138 schedule_delayed_work(&dst_gc_work, expires);
139 }
140
141 spin_unlock_bh(&dst_garbage.lock);
142 mutex_unlock(&dst_gc_mutex);
143}
144
1/*
2 * net/core/dst.c Protocol independent destination cache.
3 *
4 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
5 *
6 */
7
8#include <linux/bitops.h>

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137 expires = round_jiffies_relative(expires);
138 schedule_delayed_work(&dst_gc_work, expires);
139 }
140
141 spin_unlock_bh(&dst_garbage.lock);
142 mutex_unlock(&dst_gc_mutex);
143}
144
145int dst_discard(struct sk_buff *skb)
145int dst_discard_sk(struct sock *sk, struct sk_buff *skb)
146{
147 kfree_skb(skb);
148 return 0;
149}
146{
147 kfree_skb(skb);
148 return 0;
149}
150EXPORT_SYMBOL(dst_discard);
150EXPORT_SYMBOL(dst_discard_sk);
151
152const u32 dst_default_metrics[RTAX_MAX + 1] = {
153 /* This initializer is needed to force linker to place this variable
154 * into const section. Otherwise it might end into bss section.
155 * We really want to avoid false sharing on this variable, and catch
156 * any writes on it.
157 */
158 [RTAX_MAX] = 0xdeadbeef,

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179 dst_init_metrics(dst, dst_default_metrics, true);
180 dst->expires = 0UL;
181 dst->path = dst;
182 dst->from = NULL;
183#ifdef CONFIG_XFRM
184 dst->xfrm = NULL;
185#endif
186 dst->input = dst_discard;
151
152const u32 dst_default_metrics[RTAX_MAX + 1] = {
153 /* This initializer is needed to force linker to place this variable
154 * into const section. Otherwise it might end into bss section.
155 * We really want to avoid false sharing on this variable, and catch
156 * any writes on it.
157 */
158 [RTAX_MAX] = 0xdeadbeef,

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179 dst_init_metrics(dst, dst_default_metrics, true);
180 dst->expires = 0UL;
181 dst->path = dst;
182 dst->from = NULL;
183#ifdef CONFIG_XFRM
184 dst->xfrm = NULL;
185#endif
186 dst->input = dst_discard;
187 dst->output = dst_discard;
187 dst->output = dst_discard_sk;
188 dst->error = 0;
189 dst->obsolete = initial_obsolete;
190 dst->header_len = 0;
191 dst->trailer_len = 0;
192#ifdef CONFIG_IP_ROUTE_CLASSID
193 dst->tclassid = 0;
194#endif
195 atomic_set(&dst->__refcnt, initial_ref);

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204}
205EXPORT_SYMBOL(dst_alloc);
206
207static void ___dst_free(struct dst_entry *dst)
208{
209 /* The first case (dev==NULL) is required, when
210 protocol module is unloaded.
211 */
188 dst->error = 0;
189 dst->obsolete = initial_obsolete;
190 dst->header_len = 0;
191 dst->trailer_len = 0;
192#ifdef CONFIG_IP_ROUTE_CLASSID
193 dst->tclassid = 0;
194#endif
195 atomic_set(&dst->__refcnt, initial_ref);

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204}
205EXPORT_SYMBOL(dst_alloc);
206
207static void ___dst_free(struct dst_entry *dst)
208{
209 /* The first case (dev==NULL) is required, when
210 protocol module is unloaded.
211 */
212 if (dst->dev == NULL || !(dst->dev->flags&IFF_UP))
213 dst->input = dst->output = dst_discard;
212 if (dst->dev == NULL || !(dst->dev->flags&IFF_UP)) {
213 dst->input = dst_discard;
214 dst->output = dst_discard_sk;
215 }
214 dst->obsolete = DST_OBSOLETE_DEAD;
215}
216
217void __dst_free(struct dst_entry *dst)
218{
219 spin_lock_bh(&dst_garbage.lock);
220 ___dst_free(dst);
221 dst->next = dst_garbage.list;

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356{
357 if (dst->ops->ifdown)
358 dst->ops->ifdown(dst, dev, unregister);
359
360 if (dev != dst->dev)
361 return;
362
363 if (!unregister) {
216 dst->obsolete = DST_OBSOLETE_DEAD;
217}
218
219void __dst_free(struct dst_entry *dst)
220{
221 spin_lock_bh(&dst_garbage.lock);
222 ___dst_free(dst);
223 dst->next = dst_garbage.list;

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358{
359 if (dst->ops->ifdown)
360 dst->ops->ifdown(dst, dev, unregister);
361
362 if (dev != dst->dev)
363 return;
364
365 if (!unregister) {
364 dst->input = dst->output = dst_discard;
366 dst->input = dst_discard;
367 dst->output = dst_discard_sk;
365 } else {
366 dst->dev = dev_net(dst->dev)->loopback_dev;
367 dev_hold(dst->dev);
368 dev_put(dev);
369 }
370}
371
372static int dst_dev_event(struct notifier_block *this, unsigned long event,

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369 dst->dev = dev_net(dst->dev)->loopback_dev;
370 dev_hold(dst->dev);
371 dev_put(dev);
372 }
373}
374
375static int dst_dev_event(struct notifier_block *this, unsigned long event,

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