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[TIMEWAIT]: Introduce inet_timewait_death_row

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That groups all of the tables and variables associated to the TCP timewait
schedulling/recycling/killing code, that now can be isolated from the TCP
specific code and used by other transport protocols, such as DCCP.

Next changeset will move this code to net/ipv4/inet_timewait_sock.c

Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arnaldo Carvalho de Melo
2005-08-09 20:44:40 -07:00
committed by David S. Miller
parent 0b4e03bf0b
commit 295ff7edb8
8 changed files with 206 additions and 171 deletions
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57
include/net/inet_timewait_sock.h
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@@ -19,13 +19,69 @@
#include <linux/ip.h>
#include <linux/list.h>
#include <linux/timer.h>
#include <linux/types.h>
#include <linux/workqueue.h>
#include <net/sock.h>
#include <net/tcp_states.h>
#include <asm/atomic.h>
struct inet_hashinfo;
#define INET_TWDR_RECYCLE_SLOTS_LOG 5
#define INET_TWDR_RECYCLE_SLOTS (1 << INET_TWDR_RECYCLE_SLOTS_LOG)
/*
* If time > 4sec, it is "slow" path, no recycling is required,
* so that we select tick to get range about 4 seconds.
*/
#if HZ <= 16 || HZ > 4096
# error Unsupported: HZ <= 16 or HZ > 4096
#elif HZ <= 32
# define INET_TWDR_RECYCLE_TICK (5 + 2 - INET_TWDR_RECYCLE_SLOTS_LOG)
#elif HZ <= 64
# define INET_TWDR_RECYCLE_TICK (6 + 2 - INET_TWDR_RECYCLE_SLOTS_LOG)
#elif HZ <= 128
# define INET_TWDR_RECYCLE_TICK (7 + 2 - INET_TWDR_RECYCLE_SLOTS_LOG)
#elif HZ <= 256
# define INET_TWDR_RECYCLE_TICK (8 + 2 - INET_TWDR_RECYCLE_SLOTS_LOG)
#elif HZ <= 512
# define INET_TWDR_RECYCLE_TICK (9 + 2 - INET_TWDR_RECYCLE_SLOTS_LOG)
#elif HZ <= 1024
# define INET_TWDR_RECYCLE_TICK (10 + 2 - INET_TWDR_RECYCLE_SLOTS_LOG)
#elif HZ <= 2048
# define INET_TWDR_RECYCLE_TICK (11 + 2 - INET_TWDR_RECYCLE_SLOTS_LOG)
#else
# define INET_TWDR_RECYCLE_TICK (12 + 2 - INET_TWDR_RECYCLE_SLOTS_LOG)
#endif
/* TIME_WAIT reaping mechanism. */
#define INET_TWDR_TWKILL_SLOTS 8 /* Please keep this a power of 2. */
#define INET_TWDR_TWKILL_QUOTA 100
struct inet_timewait_death_row {
/* Short-time timewait calendar */
int twcal_hand;
int twcal_jiffie;
struct timer_list twcal_timer;
struct hlist_head twcal_row[INET_TWDR_RECYCLE_SLOTS];
spinlock_t death_lock;
int tw_count;
int period;
u32 thread_slots;
struct work_struct twkill_work;
struct timer_list tw_timer;
int slot;
struct hlist_head cells[INET_TWDR_TWKILL_SLOTS];
struct inet_hashinfo *hashinfo;
int sysctl_tw_recycle;
int sysctl_max_tw_buckets;
};
#if (BITS_PER_LONG == 64)
#define INET_TIMEWAIT_ADDRCMP_ALIGN_BYTES 8
#else
@@ -33,7 +89,6 @@
#endif
struct inet_bind_bucket;
struct inet_hashinfo;
/*
* This is a TIME_WAIT sock. It works around the memory consumption