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Jason Wang 586d17c5a0 virtio-net: send gratuitous packets when needed 
As hypervior does not have the knowledge of guest network configuration, it's
better to ask guest to send gratuitous packets when needed.

This patch implements VIRTIO_NET_F_GUEST_ANNOUNCE feature: hypervisor would
notice the guest when it thinks it's time for guest to announce the link
presnece. Guest tests VIRTIO_NET_S_ANNOUNCE bit during config change interrupt
and woule send gratuitous packets through netif_notify_peers() and ack the
notification through ctrl vq.

We need to make sure the atomicy of read and ack in guest otherwise we may ack
more times than being notified. This is done through handling the whole config
change interrupt in an non-reentrant workqueue.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 		2012-04-15 03:23:31 -04:00
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accessibility
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acpi Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux 2012-04-06 19:56:04 -07:00
amba
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ata
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atm Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-04-10 14:30:45 -04:00
auxdisplay
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base regmap: A couple of small fixes for 3.4 2012-04-07 09:56:00 -07:00
bcma bcma: fix build error on MIPS; implicit pcibios_enable_device 2012-04-10 14:13:30 -04:00
block Two fixes for regressions: 2012-04-06 17:54:53 -07:00
bluetooth Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth 2012-04-09 15:47:49 -04:00
cdrom
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char drivers/char/random.c: fix boot id uniqueness race 2012-04-12 13:12:12 -07:00
clk
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clocksource Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm 2012-03-29 16:53:48 -07:00
connector
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cpufreq ARM: SoC fixes for 3.4-rc2 2012-04-05 22:13:39 -07:00
cpuidle Merge branches 'idle-fix' and 'misc' into release 2012-04-06 21:48:59 -04:00
crypto
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dca
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devfreq ARM: global cleanups 2012-03-27 16:03:32 -07:00
dio
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dma dmaengine-fixes for 3.4-rc3 2012-04-10 15:30:16 -07:00
edac Merge branch 'stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile 2012-04-06 17:56:20 -07:00
eisa
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firewire Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
firmware
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gpio gpio: tegra: Iterate over the correct number of banks 2012-04-04 13:13:18 -06:00
gpu Merge branch 'exynos-drm-fixes' of git://git.infradead.org/users/kmpark/linux-samsung into drm-intel-fixes 2012-04-12 17:42:01 +01:00
hid simple_open: automatically convert to simple_open() 2012-04-05 15:25:50 -07:00
hsi
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hv net/hyperv: Add flow control based on hi/low watermark 2012-04-03 17:47:15 -04:00
hwmon hwmon: (ad7314) Adds missing spi_dev initialization 2012-04-03 17:08:28 -07:00
hwspinlock
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i2c i2c: prevent spurious interrupt on Designware controllers 2012-04-10 08:09:03 -07:00
ide Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
idle simple_open: automatically convert to simple_open() 2012-04-05 15:25:50 -07:00
ieee802154
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infiniband Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-04-12 19:41:23 -04:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2012-04-12 12:49:07 -07:00
iommu Merge branch 'akpm' (Andrew's patch-bomb) 2012-04-05 15:30:34 -07:00
isdn isdn/hysdn: Convert to kstrtoul_from_user 2012-04-15 03:23:31 -04:00
leds MFD changes for 3.4 2012-03-28 13:56:35 -07:00
lguest
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macintosh Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
mca
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md md/bitmap: prevent bitmap_daemon_work running while initialising bitmap 2012-04-12 16:05:06 +10:00
media Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media 2012-04-11 11:05:34 -07:00
memstick
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message Disintegrate and delete asm/system.h 2012-03-28 15:58:21 -07:00
mfd Merge branch 'akpm' (Andrew's patch-bomb) 2012-04-05 15:30:34 -07:00
misc Merge branch 'akpm' (Andrew's patch-bomb) 2012-04-05 15:30:34 -07:00
mmc mmc: use really long write timeout to deal with crappy cards 2012-04-05 20:32:34 -04:00
mtd fix breakage in mtdchar_open(), sanitize failure exits 2012-04-09 01:38:55 -04:00
net virtio-net: send gratuitous packets when needed 2012-04-15 03:23:31 -04:00
nfc
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nubus Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
of GPIO changes for v3.4 2012-03-28 14:08:46 -07:00
oprofile simple_open: automatically convert to simple_open() 2012-04-05 15:25:50 -07:00
parisc Disintegrate and delete asm/system.h 2012-03-28 15:58:21 -07:00
parport
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pci Two fixes for regressions: 2012-04-06 17:54:53 -07:00
pcmcia Merge git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia 2012-03-29 16:00:48 -07:00
pinctrl
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platform Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux 2012-03-30 16:45:39 -07:00
pnp Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux 2012-03-30 16:45:39 -07:00
power Various small bugfixes and enhancements, plus two new drivers: 2012-03-30 16:09:02 -07:00
pps
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ps3
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ptp ixp4xx_eth: Fix up the get_ts_info ethtool method. 2012-04-12 16:01:09 -04:00
rapidio
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regulator regulator: Fix a build warning in the anatop driver for 3.4 2012-04-10 10:26:41 -07:00
remoteproc simple_open: automatically convert to simple_open() 2012-04-05 15:25:50 -07:00
rpmsg
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rtc drivers/rtc/rtc-pl031.c: enable clock on all ST variants 2012-04-12 13:12:12 -07:00
s390 Disintegrate and delete asm/system.h 2012-03-28 15:58:21 -07:00
sbus Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
scsi Merge branch 'akpm' (Andrew's patch-bomb) 2012-04-05 15:30:34 -07:00
sfi
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sh SuperH updates for 3.4 merge window 2012-03-30 00:09:17 -07:00
sn
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spi Merge branch 'akpm' (Andrew's patch-bomb) 2012-04-05 15:30:34 -07:00
ssb
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staging android, lowmemorykiller: remove task handoff notifier 2012-04-09 20:48:44 -07:00
target tcm_fc: Do not free tpg structure during wq allocation failure 2012-04-06 18:57:05 -07:00
tc
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thermal
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tty SuperH updates for 3.4-rc1 2012-04-07 09:52:46 -07:00
uio
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usb ARM: SoC fixes for 3.4-rc2 2012-04-05 22:13:39 -07:00
uwb simple_open: automatically convert to simple_open() 2012-04-05 15:25:50 -07:00
vhost
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video ARM: SoC fixes for 3.4-rc2 2012-04-05 22:13:39 -07:00
virt
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virtio virtio-pci: switch to PM ops macro to initialise PM functions 2012-03-31 08:09:51 +05:30
vlynq
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w1
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watchdog ARM: cleanups of io includes 2012-03-29 18:02:10 -07:00
xen Two fixes for regressions: 2012-04-06 17:54:53 -07:00
zorro
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Kconfig Merge branch 'for-next' of git://gitorious.org/kernel-hsi/kernel-hsi 2012-04-02 09:50:40 -07:00
Makefile Merge branch 'for-next' of git://gitorious.org/kernel-hsi/kernel-hsi 2012-04-02 09:50:40 -07:00