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| author | Arnaldo Carvalho de Melo <acme@mandriva.com> | 2005-08-09 20:44:40 -0700 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2005-08-29 15:55:48 -0700 |
| commit | 295ff7edb8f72b77d524759266f7524deae379b3 (patch) | |
| tree | e16e99e324444fb01ae3dfd221b5d47a88acfeb8 /include/net/inet_timewait_sock.h | |
| parent | 0b4e03bf0bc43ad6250a1e2fa25fc3eb2b028977 (diff) | |
| download | lwn-295ff7edb8f72b77d524759266f7524deae379b3.tar.gz lwn-295ff7edb8f72b77d524759266f7524deae379b3.zip | |
[TIMEWAIT]: Introduce inet_timewait_death_row
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>
Diffstat (limited to 'include/net/inet_timewait_sock.h')
| -rw-r--r-- | include/net/inet_timewait_sock.h | 57 |
1 files changed, 56 insertions, 1 deletions
diff --git a/include/net/inet_timewait_sock.h b/include/net/inet_timewait_sock.h index e00861b16696..a7e8052e2fbf 100644 --- a/include/net/inet_timewait_sock.h +++ b/include/net/inet_timewait_sock.h @@ -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 |