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author | Pavel Emelyanov <xemul@openvz.org> | 2007-10-15 09:31:52 (GMT) |
---|---|---|
committer | David S. Miller <davem@sunset.davemloft.net> | 2007-10-15 19:26:39 (GMT) |
commit | 7eb95156d9dce2f59794264db336ce007d71638b (patch) | |
tree | c283a095f1a9d530edb1a7058454ba30b4f7d028 /net/ipv4/inet_fragment.c | |
parent | 5ab11c98d3a950faf6922b6166e5f8fc874590e7 (diff) | |
download | linux-7eb95156d9dce2f59794264db336ce007d71638b.tar.xz |
[INET]: Collect frag queues management objects together
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>
Diffstat (limited to 'net/ipv4/inet_fragment.c')
-rw-r--r-- | net/ipv4/inet_fragment.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/net/ipv4/inet_fragment.c b/net/ipv4/inet_fragment.c new file mode 100644 index 0000000..69623ff --- /dev/null +++ b/net/ipv4/inet_fragment.c @@ -0,0 +1,44 @@ +/* + * inet fragments management + * + * 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. + * + * Authors: Pavel Emelyanov <xemul@openvz.org> + * Started as consolidation of ipv4/ip_fragment.c, + * ipv6/reassembly. and ipv6 nf conntrack reassembly + */ + +#include <linux/list.h> +#include <linux/spinlock.h> +#include <linux/module.h> +#include <linux/timer.h> +#include <linux/mm.h> + +#include <net/inet_frag.h> + +void inet_frags_init(struct inet_frags *f) +{ + int i; + + for (i = 0; i < INETFRAGS_HASHSZ; i++) + INIT_HLIST_HEAD(&f->hash[i]); + + INIT_LIST_HEAD(&f->lru_list); + rwlock_init(&f->lock); + + f->rnd = (u32) ((num_physpages ^ (num_physpages>>7)) ^ + (jiffies ^ (jiffies >> 6))); + + f->nqueues = 0; + atomic_set(&f->mem, 0); + +} +EXPORT_SYMBOL(inet_frags_init); + +void inet_frags_fini(struct inet_frags *f) +{ +} +EXPORT_SYMBOL(inet_frags_fini); |