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[SOCK]: Enumerate struct proto-s to facilitate percpu inuse accounting (v2).

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The inuse counters are going to become a per-cpu array.  Introduce an
index for this array on the struct proto.

To handle the case of proto register-unregister-register loop the
bitmap is used. All its bits manipulations are protected with
proto_list_lock and a sanity check for the bitmap being exhausted is
also added.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Acked-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pavel Emelyanov 2008-03-28 16:38:17 -07:00 • committed by David S. Miller
parent bc578a54f0
commit 13ff3d6fa4
2 changed files with 35 additions and 0 deletions
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1
include/net/sock.h
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@ -562,6 +562,7 @@ struct proto {
/* Keeping track of sockets in use */
#ifdef CONFIG_PROC_FS
unsigned int inuse_idx;
struct pcounter inuse;
#endif