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[INET]: Collect frag queues management objects together

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There are some objects that are common in all the places
which are used to keep track of frag queues, they are:

 * hash table
 * LRU list
 * rw lock
 * rnd number for hash function
 * the number of queues
 * the amount of memory occupied by queues
 * secret timer

Move all this stuff into one structure (struct inet_frags)
to make it possible use them uniformly in the future. Like
with the previous patch this mostly consists of hunks like

-    write_lock(&ipfrag_lock);
+    write_lock(&ip4_frags.lock);

To address the issue with exporting the number of queues and
the amount of memory occupied by queues outside the .c file
they are declared in, I introduce a couple of helpers.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pavel Emelyanov
2007-10-15 02:31:52 -07:00
committed by David S. Miller
parent 5ab11c98d3
commit 7eb95156d9
10 changed files with 224 additions and 179 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
include/net/inet_frag.h
View File

@ -18,4 +18,19 @@ struct inet_frag_queue {
#define LAST_IN 1
};
#define INETFRAGS_HASHSZ 64
struct inet_frags {
struct list_head lru_list;
struct hlist_head hash[INETFRAGS_HASHSZ];
rwlock_t lock;
u32 rnd;
int nqueues;
atomic_t mem;
struct timer_list secret_timer;
};
void inet_frags_init(struct inet_frags *);
void inet_frags_fini(struct inet_frags *);
#endif