From f9004dbfff8a3fbbd7e2a88c8a4327c7f2f8e5b2 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Wed, 31 Jan 2024 01:04:47 +0000
Subject: [PATCH] add driver 5G
---
kernel/include/net/inet_frag.h | 52 ++++++++++++++++++++++++++++++++++------------------
1 files changed, 34 insertions(+), 18 deletions(-)
diff --git a/kernel/include/net/inet_frag.h b/kernel/include/net/inet_frag.h
index b02bf73..4cbd413 100644
--- a/kernel/include/net/inet_frag.h
+++ b/kernel/include/net/inet_frag.h
@@ -3,19 +3,24 @@
#define __NET_FRAG_H__
#include <linux/rhashtable-types.h>
+#include <linux/completion.h>
-struct netns_frags {
+/* Per netns frag queues directory */
+struct fqdir {
/* sysctls */
long high_thresh;
long low_thresh;
int timeout;
int max_dist;
struct inet_frags *f;
+ struct net *net;
+ bool dead;
struct rhashtable rhashtable ____cacheline_aligned_in_smp;
/* Keep atomic mem on separate cachelines in structs that include it */
atomic_long_t mem ____cacheline_aligned_in_smp;
+ struct work_struct destroy_work;
};
/**
@@ -24,11 +29,13 @@
* @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_HASH_DEAD: inet_frag_kill() has not removed fq from rhashtable
*/
enum {
INET_FRAG_FIRST_IN = BIT(0),
INET_FRAG_LAST_IN = BIT(1),
INET_FRAG_COMPLETE = BIT(2),
+ INET_FRAG_HASH_DEAD = BIT(3),
};
struct frag_v4_compare_key {
@@ -56,7 +63,6 @@
* @timer: queue expiration timer
* @lock: spinlock protecting this frag
* @refcnt: reference count of the queue
- * @fragments: received fragments head
* @rb_fragments: received fragments rb-tree root
* @fragments_tail: received fragments tail
* @last_run_head: the head of the last "run". see ip_fragment.c
@@ -65,7 +71,7 @@
* @meat: length of received fragments so far
* @flags: fragment queue flags
* @max_size: maximum received fragment size
- * @net: namespace that this frag belongs to
+ * @fqdir: pointer to struct fqdir
* @rcu: rcu head for freeing deferall
*/
struct inet_frag_queue {
@@ -77,8 +83,7 @@
struct timer_list timer;
spinlock_t lock;
refcount_t refcnt;
- struct sk_buff *fragments; /* used in 6lopwpan IPv6. */
- struct rb_root rb_fragments; /* Used in IPv4/IPv6. */
+ struct rb_root rb_fragments;
struct sk_buff *fragments_tail;
struct sk_buff *last_run_head;
ktime_t stamp;
@@ -86,7 +91,7 @@
int meat;
__u8 flags;
u16 max_size;
- struct netns_frags *net;
+ struct fqdir *fqdir;
struct rcu_head rcu;
};
@@ -100,21 +105,32 @@
struct kmem_cache *frags_cachep;
const char *frags_cache_name;
struct rhashtable_params rhash_params;
+ refcount_t refcnt;
+ struct completion completion;
};
int inet_frags_init(struct inet_frags *);
void inet_frags_fini(struct inet_frags *);
-static inline int inet_frags_init_net(struct netns_frags *nf)
+int fqdir_init(struct fqdir **fqdirp, struct inet_frags *f, struct net *net);
+
+static inline void fqdir_pre_exit(struct fqdir *fqdir)
{
- atomic_long_set(&nf->mem, 0);
- return rhashtable_init(&nf->rhashtable, &nf->f->rhash_params);
+ /* Prevent creation of new frags.
+ * Pairs with READ_ONCE() in inet_frag_find().
+ */
+ WRITE_ONCE(fqdir->high_thresh, 0);
+
+ /* Pairs with READ_ONCE() in inet_frag_kill(), ip_expire()
+ * and ip6frag_expire_frag_queue().
+ */
+ WRITE_ONCE(fqdir->dead, true);
}
-void inet_frags_exit_net(struct netns_frags *nf);
+void fqdir_exit(struct fqdir *fqdir);
void inet_frag_kill(struct inet_frag_queue *q);
void inet_frag_destroy(struct inet_frag_queue *q);
-struct inet_frag_queue *inet_frag_find(struct netns_frags *nf, void *key);
+struct inet_frag_queue *inet_frag_find(struct fqdir *fqdir, void *key);
/* Free all skbs in the queue; return the sum of their truesizes. */
unsigned int inet_frag_rbtree_purge(struct rb_root *root);
@@ -127,19 +143,19 @@
/* Memory Tracking Functions. */
-static inline long frag_mem_limit(const struct netns_frags *nf)
+static inline long frag_mem_limit(const struct fqdir *fqdir)
{
- return atomic_long_read(&nf->mem);
+ return atomic_long_read(&fqdir->mem);
}
-static inline void sub_frag_mem_limit(struct netns_frags *nf, long val)
+static inline void sub_frag_mem_limit(struct fqdir *fqdir, long val)
{
- atomic_long_sub(val, &nf->mem);
+ atomic_long_sub(val, &fqdir->mem);
}
-static inline void add_frag_mem_limit(struct netns_frags *nf, long val)
+static inline void add_frag_mem_limit(struct fqdir *fqdir, long val)
{
- atomic_long_add(val, &nf->mem);
+ atomic_long_add(val, &fqdir->mem);
}
/* RFC 3168 support :
@@ -162,7 +178,7 @@
void *inet_frag_reasm_prepare(struct inet_frag_queue *q, struct sk_buff *skb,
struct sk_buff *parent);
void inet_frag_reasm_finish(struct inet_frag_queue *q, struct sk_buff *head,
- void *reasm_data);
+ void *reasm_data, bool try_coalesce);
struct sk_buff *inet_frag_pull_head(struct inet_frag_queue *q);
#endif
--
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