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authorArnaldo Carvalho de Melo <acme@mandriva.com>2005-08-09 20:44:40 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2005-08-29 15:55:48 -0700
commit295ff7edb8f72b77d524759266f7524deae379b3 (patch)
treee16e99e324444fb01ae3dfd221b5d47a88acfeb8 /include/net/inet_timewait_sock.h
parent0b4e03bf0bc43ad6250a1e2fa25fc3eb2b028977 (diff)
downloadop-kernel-dev-295ff7edb8f72b77d524759266f7524deae379b3.zip
op-kernel-dev-295ff7edb8f72b77d524759266f7524deae379b3.tar.gz
[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.h57
1 files changed, 56 insertions, 1 deletions
diff --git a/include/net/inet_timewait_sock.h b/include/net/inet_timewait_sock.h
index e00861b..a7e8052 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
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