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authorJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-04-11 10:41:07 +0300
committerJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-04-13 08:17:18 +0300
commite09b41010ba33a20a87472ee821fa407a5b8da36 (patch)
treed10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/include/net/inet_frag.h
parentf93b97fd65072de626c074dbe099a1fff05ce060 (diff)
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page. During the rebasing, the following patch collided: Force tick interrupt and get rid of softirq magic(I70131fb85). Collisions have been removed because its logic was found on the source already. Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769 Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/include/net/inet_frag.h')
-rw-r--r--kernel/include/net/inet_frag.h34
1 files changed, 21 insertions, 13 deletions
diff --git a/kernel/include/net/inet_frag.h b/kernel/include/net/inet_frag.h
index 8d1765577..ac42bbb37 100644
--- a/kernel/include/net/inet_frag.h
+++ b/kernel/include/net/inet_frag.h
@@ -21,13 +21,11 @@ struct netns_frags {
* @INET_FRAG_FIRST_IN: first fragment has arrived
* @INET_FRAG_LAST_IN: final fragment has arrived
* @INET_FRAG_COMPLETE: frag queue has been processed and is due for destruction
- * @INET_FRAG_EVICTED: frag queue is being evicted
*/
enum {
INET_FRAG_FIRST_IN = BIT(0),
INET_FRAG_LAST_IN = BIT(1),
INET_FRAG_COMPLETE = BIT(2),
- INET_FRAG_EVICTED = BIT(3)
};
/**
@@ -43,8 +41,9 @@ enum {
* @len: total length of the original datagram
* @meat: length of received fragments so far
* @flags: fragment queue flags
- * @max_size: (ipv4 only) maximum received fragment size with IP_DF set
+ * @max_size: maximum received fragment size
* @net: namespace that this frag belongs to
+ * @list_evictor: list of queues to forcefully evict (e.g. due to low memory)
*/
struct inet_frag_queue {
spinlock_t lock;
@@ -59,6 +58,7 @@ struct inet_frag_queue {
__u8 flags;
u16 max_size;
struct netns_frags *net;
+ struct hlist_node list_evictor;
};
#define INETFRAGS_HASHSZ 1024
@@ -108,7 +108,15 @@ struct inet_frags {
int inet_frags_init(struct inet_frags *);
void inet_frags_fini(struct inet_frags *);
-void inet_frags_init_net(struct netns_frags *nf);
+static inline int inet_frags_init_net(struct netns_frags *nf)
+{
+ return percpu_counter_init(&nf->mem, 0, GFP_KERNEL);
+}
+static inline void inet_frags_uninit_net(struct netns_frags *nf)
+{
+ percpu_counter_destroy(&nf->mem);
+}
+
void inet_frags_exit_net(struct netns_frags *nf, struct inet_frags *f);
void inet_frag_kill(struct inet_frag_queue *q, struct inet_frags *f);
@@ -125,6 +133,11 @@ static inline void inet_frag_put(struct inet_frag_queue *q, struct inet_frags *f
inet_frag_destroy(q, f);
}
+static inline bool inet_frag_evicting(struct inet_frag_queue *q)
+{
+ return !hlist_unhashed(&q->list_evictor);
+}
+
/* Memory Tracking Functions. */
/* The default percpu_counter batch size is not big enough to scale to
@@ -139,19 +152,14 @@ static inline int frag_mem_limit(struct netns_frags *nf)
return percpu_counter_read(&nf->mem);
}
-static inline void sub_frag_mem_limit(struct inet_frag_queue *q, int i)
-{
- __percpu_counter_add(&q->net->mem, -i, frag_percpu_counter_batch);
-}
-
-static inline void add_frag_mem_limit(struct inet_frag_queue *q, int i)
+static inline void sub_frag_mem_limit(struct netns_frags *nf, int i)
{
- __percpu_counter_add(&q->net->mem, i, frag_percpu_counter_batch);
+ __percpu_counter_add(&nf->mem, -i, frag_percpu_counter_batch);
}
-static inline void init_frag_mem_limit(struct netns_frags *nf)
+static inline void add_frag_mem_limit(struct netns_frags *nf, int i)
{
- percpu_counter_init(&nf->mem, 0, GFP_KERNEL);
+ __percpu_counter_add(&nf->mem, i, frag_percpu_counter_batch);
}
static inline unsigned int sum_frag_mem_limit(struct netns_frags *nf)