android_kernel_samsung_msm8976/drivers
Or Gerlitz 335a64a5a9 IPoIB: Allow setting policy to ignore multicast groups
The kernel IB stack allows (through the RDMA CM) userspace
applications to join and use multicast groups from the IPoIB MGID
range.  This allows multicast traffic to be handled directly from
userspace QPs, without going through the kernel stack, which gives
better performance for some applications.

However, to fully interoperate with IP multicast, such userspace
applications need to participate in IGMP reports and queries, or else
routers may not forward the multicast traffic to the system where the
application is running.  The simplest way to do this is to share the
kernel IGMP implementation by using the IP_ADD_MEMBERSHIP option to
join multicast groups that are being handled directly in userspace.

However, in such cases, the actual multicast traffic should not also
be handled by the IPoIB interface, because that would burn resources
handling multicast packets that will just be discarded in the kernel.

To handle this, this patch adds lookup on the database used for IB
multicast group reference counting when IPoIB is joining multicast
groups, and if a multicast group is already handled by user space,
then the IPoIB kernel driver ignores the group.  This is controlled by
a per-interface policy flag.  When the flag is set, IPoIB will not
join and attach its QP to a multicast group which already has an entry
in the database; when the flag is cleared, IPoIB will behave as before
this change.

For each IPoIB interface, the /sys/class/net/$intf/umcast attribute
controls the policy flag.  The default value is off/0.

Signed-off-by: Or Gerlitz <ogerlitz@voltaire.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-10 13:02:30 -07:00
..
acorn/char Remove the arm26 port 2007-07-31 15:39:39 -07:00
acpi ACPI: CONFIG_ACPI_SLEEP=n power off regression in 2.6.23-rc8 (NOT in rc7) 2007-09-25 17:58:52 -04:00
amba
ata sata_mv: correct S/G table limits 2007-10-09 12:38:26 -07:00
atm Add some help texts to recently-introduced kconfig items 2007-08-18 09:52:50 -07:00
auxdisplay cfag12864b fix 2007-08-22 19:52:46 -07:00
base Driver core: fix SYSF_DEPRECATED breakage for nested classdevs 2007-10-07 16:42:22 -07:00
block Fix "Fix DAC960 driver on machines which don't support 64-bit DMA" 2007-09-19 11:24:16 -07:00
bluetooth [Bluetooth] Add missing stat.byte_rx counter modification 2007-09-09 08:39:27 +02:00
cdrom cdrom_open() forgets to unlock on -EROFS failure exits 2007-09-26 08:20:44 +02:00
char Correct Makefile rule for generating custom keymap 2007-10-08 16:06:51 -07:00
clocksource
connector
cpufreq
crypto Add some help texts to recently-introduced kconfig items 2007-08-18 09:52:50 -07:00
dio
dma [IOAT]: ioatdma needs to to play nice in a multi-dma-client world 2007-08-26 18:35:40 -07:00
edac drivers/edac: fix e752x correct return code 2007-09-11 17:21:19 -07:00
eisa
fc4
firewire firewire: point to migration document 2007-10-07 13:48:41 +02:00
firmware
hid Add some help texts to recently-introduced kconfig items 2007-08-18 09:52:50 -07:00
hwmon hwmon: End of I/O region off-by-one 2007-09-09 10:38:37 -04:00
i2c i2c-algo-bit: Read block data bugfix 2007-09-09 22:29:14 +02:00
ide Fix non-terminated PCI match table in PowerMac IDE 2007-10-06 09:32:56 -07:00
ieee1394 ieee1394: ohci1394: fix initialization if built non-modular 2007-09-20 21:19:45 +02:00
infiniband IPoIB: Allow setting policy to ignore multicast groups 2007-10-10 13:02:30 -07:00
input Input: xpad - fix dependancy on LEDS class 2007-09-28 15:38:12 -07:00
isdn ISDN: Fix data access out of array bounds 2007-10-08 13:01:21 -07:00
kvm KVM: Fix virtualization menu help text 2007-09-22 12:55:18 -07:00
leds
lguest fix modules oopsing in lguest guests 2007-09-25 08:51:04 -07:00
macintosh [POWERPC] Fix undefined reference to device_power_up/resume 2007-08-25 16:58:27 +10:00
mca
md raid5: fix 2 bugs in ops_complete_biofill 2007-09-24 13:23:35 -07:00
media V4L/DVB (6052): ivtv: fix udma yuv bug 2007-09-30 10:31:34 -03:00
message Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6 2007-08-06 17:48:34 -07:00
mfd
misc Pull thinkpad into release branch 2007-09-17 00:58:40 -04:00
mmc bug in AT91 MCI suspend routines 2007-09-11 17:21:51 +02:00
mtd pci: fix unterminated pci_device_id lists 2007-09-19 11:24:17 -07:00
net mlx4_core: Use mmiowb() to avoid firmware commands getting jumbled up 2007-10-09 19:59:18 -07:00
nubus
of
oprofile
parisc
parport parport_pc locking fix 2007-07-31 15:39:37 -07:00
pci Fix bogus PCI quirk for e100 2007-09-28 16:21:10 -07:00
pcmcia pcmcia: give socket time to power down 2007-07-31 15:39:38 -07:00
pnp PNP: remove SMCf010 quirk 2007-09-11 17:21:19 -07:00
power [PATCH] missing null termination in power supply uevent 2007-09-21 01:22:23 +04:00
ps3
rapidio
rtc rtc: rtc-ds1553.c should use resource_size_t for base address 2007-09-19 11:24:17 -07:00
s390 Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6 2007-09-11 07:46:09 -07:00
sbus Videopix Frame Grabber: Fix unreleased lock in vfc_debug() 2007-07-31 15:39:43 -07:00
scsi [SCSI] megaraid_old: fix READ_CAPACITY 2007-10-04 12:08:49 -04:00
serial Add manufacturer and card id of teltonica pcmcia modems 2007-10-07 16:28:43 -07:00
sh
sn
spi spi_mpc83xx: hang fix 2007-09-11 17:21:19 -07:00
tc
telephony
uio
usb Revert "usb-storage: implement autosuspend" 2007-09-13 06:01:24 -07:00
video intelfb: Fix bug in DPLL disable 2007-09-19 11:24:18 -07:00
w1 missing null termination in one wire uevent 2007-09-25 08:51:04 -07:00
xen
zorro zorro: Make sysfs config attribute read-only 2007-08-22 19:52:45 -07:00
Kconfig
Makefile