Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 (67ab33db) · Commits · 戴 / test

Documentation/networking/ipvs-sysctl.txt

0 → 100644

+143 −0

Original line number	Diff line number	Diff line
		/proc/sys/net/ipv4/vs/* Variables:

		am_droprate - INTEGER
		default 10

		It sets the always mode drop rate, which is used in the mode 3
		of the drop_rate defense.

		amemthresh - INTEGER
		default 1024

		It sets the available memory threshold (in pages), which is
		used in the automatic modes of defense. When there is no
		enough available memory, the respective strategy will be
		enabled and the variable is automatically set to 2, otherwise
		the strategy is disabled and the variable is set to 1.

		cache_bypass - BOOLEAN
		0 - disabled (default)
		not 0 - enabled

		If it is enabled, forward packets to the original destination
		directly when no cache server is available and destination
		address is not local (iph->daddr is RTN_UNICAST). It is mostly
		used in transparent web cache cluster.

		debug_level - INTEGER
		0 - transmission error messages (default)
		1 - non-fatal error messages
		2 - configuration
		3 - destination trash
		4 - drop entry
		5 - service lookup
		6 - scheduling
		7 - connection new/expire, lookup and synchronization
		8 - state transition
		9 - binding destination, template checks and applications
		10 - IPVS packet transmission
		11 - IPVS packet handling (ip_vs_in/ip_vs_out)
		12 or more - packet traversal

		Only available when IPVS is compiled with the CONFIG_IPVS_DEBUG

		Higher debugging levels include the messages for lower debugging
		levels, so setting debug level 2, includes level 0, 1 and 2
		messages. Thus, logging becomes more and more verbose the higher
		the level.

		drop_entry - INTEGER
		0 - disabled (default)

		The drop_entry defense is to randomly drop entries in the
		connection hash table, just in order to collect back some
		memory for new connections. In the current code, the
		drop_entry procedure can be activated every second, then it
		randomly scans 1/32 of the whole and drops entries that are in
		the SYN-RECV/SYNACK state, which should be effective against
		syn-flooding attack.

		The valid values of drop_entry are from 0 to 3, where 0 means
		that this strategy is always disabled, 1 and 2 mean automatic
		modes (when there is no enough available memory, the strategy
		is enabled and the variable is automatically set to 2,
		otherwise the strategy is disabled and the variable is set to
		1), and 3 means that that the strategy is always enabled.

		drop_packet - INTEGER
		0 - disabled (default)

		The drop_packet defense is designed to drop 1/rate packets
		before forwarding them to real servers. If the rate is 1, then
		drop all the incoming packets.

		The value definition is the same as that of the drop_entry. In
		the automatic mode, the rate is determined by the follow
		formula: rate = amemthresh / (amemthresh - available_memory)
		when available memory is less than the available memory
		threshold. When the mode 3 is set, the always mode drop rate
		is controlled by the /proc/sys/net/ipv4/vs/am_droprate.

		expire_nodest_conn - BOOLEAN
		0 - disabled (default)
		not 0 - enabled

		The default value is 0, the load balancer will silently drop
		packets when its destination server is not available. It may
		be useful, when user-space monitoring program deletes the
		destination server (because of server overload or wrong
		detection) and add back the server later, and the connections
		to the server can continue.

		If this feature is enabled, the load balancer will expire the
		connection immediately when a packet arrives and its
		destination server is not available, then the client program
		will be notified that the connection is closed. This is
		equivalent to the feature some people requires to flush
		connections when its destination is not available.

		expire_quiescent_template - BOOLEAN
		0 - disabled (default)
		not 0 - enabled

		When set to a non-zero value, the load balancer will expire
		persistent templates when the destination server is quiescent.
		This may be useful, when a user makes a destination server
		quiescent by setting its weight to 0 and it is desired that
		subsequent otherwise persistent connections are sent to a
		different destination server. By default new persistent
		connections are allowed to quiescent destination servers.

		If this feature is enabled, the load balancer will expire the
		persistence template if it is to be used to schedule a new
		connection and the destination server is quiescent.

		nat_icmp_send - BOOLEAN
		0 - disabled (default)
		not 0 - enabled

		It controls sending icmp error messages (ICMP_DEST_UNREACH)
		for VS/NAT when the load balancer receives packets from real
		servers but the connection entries don't exist.

		secure_tcp - INTEGER
		0 - disabled (default)

		The secure_tcp defense is to use a more complicated state
		transition table and some possible short timeouts of each
		state. In the VS/NAT, it delays the entering the ESTABLISHED
		until the real server starts to send data and ACK packet
		(after 3-way handshake).

		The value definition is the same as that of drop_entry or
		drop_packet.

		sync_threshold - INTEGER
		default 3

		It sets synchronization threshold, which is the minimum number
		of incoming packets that a connection needs to receive before
		the connection will be synchronized. A connection will be
		synchronized, every time the number of its incoming packets
		modulus 50 equals the threshold. The range of the threshold is
		from 0 to 49.

drivers/atm/ambassador.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -31,6 +31,7 @@
		#include <linux/atmdev.h>
		#include <linux/delay.h>
		#include <linux/interrupt.h>
		#include <linux/poison.h>

		#include <asm/atomic.h>
		#include <asm/io.h>
		@@ -1995,7 +1996,7 @@ static int __devinit ucode_init (loader_block * lb, amb_dev * dev) {
		}
		i += 1;
		}
		if (*pointer == 0xdeadbeef) {
		if (*pointer == ATM_POISON) {
		return loader_start (lb, dev, ucode_start);
		} else {
		// cast needed as there is no %? for pointer differnces

drivers/atm/idt77252.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -35,6 +35,7 @@ static char const rcsid[] =

		#include <linux/module.h>
		#include <linux/pci.h>
		#include <linux/poison.h>
		#include <linux/skbuff.h>
		#include <linux/kernel.h>
		#include <linux/vmalloc.h>
		@@ -3657,7 +3658,7 @@ probe_sram(struct idt77252_dev *card)
		writel(SAR_CMD_WRITE_SRAM \| (0 << 2), SAR_REG_CMD);

		for (addr = 0x4000; addr < 0x80000; addr += 0x4000) {
		writel(0xdeadbeef, SAR_REG_DR0);
		writel(ATM_POISON, SAR_REG_DR0);
		writel(SAR_CMD_WRITE_SRAM \| (addr << 2), SAR_REG_CMD);

		writel(SAR_CMD_READ_SRAM \| (0 << 2), SAR_REG_CMD);

drivers/bluetooth/bluecard_cs.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -739,6 +739,7 @@ static int bluecard_open(bluecard_info_t *info)

		hdev->type = HCI_PCCARD;
		hdev->driver_data = info;
		SET_HCIDEV_DEV(hdev, &info->p_dev->dev);

		hdev->open = bluecard_hci_open;
		hdev->close = bluecard_hci_close;

drivers/bluetooth/bt3c_cs.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -582,6 +582,7 @@ static int bt3c_open(bt3c_info_t *info)

		hdev->type = HCI_PCCARD;
		hdev->driver_data = info;
		SET_HCIDEV_DEV(hdev, &info->p_dev->dev);

		hdev->open = bt3c_hci_open;
		hdev->close = bt3c_hci_close;

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