Commit Graph

429304 Commits

Author SHA1 Message Date
Eric W. Biederman
374e29da7c i825xx: Call dev_kfree_skb_any instead of dev_kfree_skb.
Replace dev_kfree_skb with dev_kfree_skb_any in i596_start_xmit that
can be called in hard irq and other contexts, when the skb is dropped.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2014-03-24 21:19:02 -07:00
Eric W. Biederman
361457415a ucc_geth: Call dev_consume_skb_any instead of dev_kfree_skb.
Replace dev_kfree_skb with dev_consume_skb_any in ucc_geth_tx that can
be called in hard irq and other contexts, when processing the
tx completion event.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2014-03-24 21:19:02 -07:00
Eric W. Biederman
8e7e687452 fec: Call dev_kfree_skb_any instead of kfree_skb.
Replace kfree_skb with dev_kfree_skb_any in fec_enet_start_xmit that
can be called in hard irq and other contexts, when the packet is
dropped.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2014-03-24 21:19:01 -07:00
Eric W. Biederman
36fc210904 sundance: Call dev_kfree_skb_any instead of dev_kfree_skb.
Replace dev_kfree_skb with dev_kfree_skb_any in start_tx that can
be called in hard irq and other contexts, when the skb is dropped.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2014-03-24 21:19:01 -07:00
Eric W. Biederman
290a79dbf7 uli526x: Call dev_kfree/consume_skb_any instead of dev_kfree_skb.
Replace dev_kfree_skb with dev_kfree_skb_any in uli562x_start_xmit
that can be called in hard irq and other contexts, when the packet is
dropped.

Replace dev_kfree_skb with dev_consume_skb_any in uli562x_start_xmit
that can be called in hard irq and other contexts, when the packet is
transmitted.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2014-03-24 21:19:00 -07:00
Eric W. Biederman
086dfb7fad dmfe: Call dev_kfree/consume_skb_any instead of dev_kfree_skb.
Replace dev_kfree_skb with dev_kfree_skb_any in dmfe_start_xmit that
can be called in hard irq and other contexts, when the packet is
dropped.

Replace dev_kfree_skb with dev_consume_skb_any in dmfe_start_xmit that
can be called in hard irq and other contexts, when the packet is
transmitted.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2014-03-24 21:19:00 -07:00
Eric W. Biederman
2c3d0bc027 dm9000: Call dev_consume_skb_any instead of dev_kfree_skb.
Replace dev_kfree_skb with dev_consume_skb_any in dm9000_start_xmit
that can be called in hard irq and other contexts, on the path
that successfully transmits the packet.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2014-03-24 21:18:59 -07:00
Eric W. Biederman
98d8a65d10 enic: Call dev_kfree_skb_any instead of dev_kfree_skb.
Replace dev_kfree_skb with dev_kfree_skb_any in enic_hard_start_xmit
that can be called in hard irq and other contexts.

enic_hard_start_xmit only frees the skb when dropping it.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2014-03-24 21:18:59 -07:00
Eric W. Biederman
d6bea829ca cs89x0: Call dev_consume_skb_any instead of dev_kfree_skb.
Replace dev_kfree_skb with dev_consume_skb_any in net_send_packet that
can be called in hard irq and other contexts.

net_send_packet consumes (not drops) the skb of interest.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2014-03-24 21:18:58 -07:00
Eric W. Biederman
42ffda5fe7 cxfb4vf: Call dev_kfree/consume_skb_any instead of [dev_]kfree_skb.
Replace kfree_skb with dev_consume_skb_any in free_tx_desc that can be
called in hard irq and other contexts. dev_consume_skb_any is used
as this function consumes successfully transmitted skbs.

Replace dev_kfree_skb with dev_kfree_skb_any in t4vf_eth_xmit that can
be called in hard irq and other contexts, on paths that drop the skb.

Replace dev_kfree_skb with dev_consume_skb_any in t4vf_eth_xmit that can
be called in hard irq and other contexts, on paths that successfully
transmit the skb.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2014-03-24 21:18:58 -07:00
Eric W. Biederman
a7525198a8 cxgb4: Call dev_kfree/consume_skb_any instead of [dev_]kfree_skb.
Replace kfree_skb with dev_consume_skb_any in free_tx_desc that can be
called in hard irq and other contexts. dev_consume_skb_any is used
as this function consumes successfully transmitted skbs.

Replace dev_kfree_skb with dev_kfree_skb_any in t4_eth_xmit that can
be called in hard irq and other contexts, on paths that drop the skb.

Replace dev_kfree_skb with dev_consume_skb_any in t4_eth_xmit that can
be called in hard irq and other contexts, on paths that successfully
transmit the skb.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2014-03-24 21:18:57 -07:00
Eric W. Biederman
f9ec8131bb cxgb3: Call dev_kfree/consume_skb_any instead of [dev_]kfree_skb.
Replace kfree_skb with dev_consume_skb_any in free_tx_desc, and
write_tx_pkt_wr that can be called in hard irq and other contexts.

Replace dev_kfree_skb with dev_kfree_skb_any in t3_eth_xmit that can
be called in hard irq and other contexts.

dev_kfree_skb is replaced with dev_kfree_skb_any in t3_eth_xmit as
that location is a packet drop, while kfree_skb in free_tx_desc,
and in write_tx_pkt_wr are places where packets are consumed
in a healthy manner.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2014-03-24 21:18:57 -07:00
Eric W. Biederman
f5cf76ba62 xgmac: Call dev_kfree/consume_skb_any instead of dev_kfree_skb.
Replace dev_kfree_skb with dev_consume_skb_any in xgmac_tx_complete
that can be called in hard irq and other contexts.

Replace dev_kfree_skb with dev_kfree_skb_any in xgmac_xmit that can
be called in hard irq and other contexts.

dev_consume_skb_any is used in xgamc_tx_complete as skbs that reach
there have been successfully transmitted, dev_kfree_skby_any is used
in xgmac_xmit as skbs that are freed there are being dropped.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2014-03-24 21:18:56 -07:00
Eric W. Biederman
c88b5b6a68 macb: Call dev_kfree_skb_any instead of kfree_skb.
Replace kfree_skb with dev_kfree_skb_any in macb_start_xmit that can
be called in hard irq and other contexts.

macb_start_xmit only frees skbs when dropping them so
dev_kfree_skb_any is used.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2014-03-24 21:18:55 -07:00
Eric W. Biederman
27400df8e9 bnad: Call dev_kfree_skb_any instead of dev_kfree_skb.
Replace dev_kfree_skb with dev_kfree_skb_any in bnad_start_xmit that
can be called in hard irq and other contexts.

dev_kfree_skb_any is used as bnad_start_xmit only frees skbs when to
drop them, normally transmitted packets are handled elsewhere.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2014-03-24 21:18:55 -07:00
Eric W. Biederman
07641c8fa4 atl1c: Call dev_kfree/consume_skb_any instead of dev_kfree_skb.
The call path: atl1c_xmit_frame, atlc_tx_rollback, atl1c_clean_buffer
can not be tell at compile time if it will be invoked from hard irq
or other context, as atl1c_xmit_frame does not know.  So remove
the logic that  passes the compile time knowledge into al1c_clean_buffer
and figure out it out at runtime with dev_consume_skb_any.

Replace dev_kfree_skb with dev_kfree_skb_any in atl1c_xmit_frame that
can be called in hard irq and other contexts.

Replace dev_kfree_skb and dev_kfree_skb_irq with dev_consume_skb_any
in atl1c_clean_buffer that can be called in hard irq and other
contexts.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2014-03-24 21:18:54 -07:00
Eric W. Biederman
548ff1ed7d alx: Call dev_kfree_skb_any instead of dev_kfree_skb.
Replace dev_kfree_skb with dev_kfree_skb_any in alx_start_xmit that
can be called in hard irq and other contexts.

dev_kfree_skb_any is used as alx_start_xmit only frees skbs
when dropping them.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2014-03-24 21:18:54 -07:00
Eric W. Biederman
af9ba92cb2 pcnet32: Call dev_kfree_skb_any instead of dev_kfree_skb.
Replace dev_kfree_skb with dev_kfree_skb_any in pcnet32_start_xmit
that can be called in hard irq and other contexts.

dev_kfree_skb_any is used as pcnet32_start_xmit only frees an
skb when it drops a packet during transmit.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2014-03-24 21:18:53 -07:00
Eric W. Biederman
37392c7b84 lance: Call dev_consume_skb_any instead of dev_kfree_skb.
Replace dev_kfree_skb with dev_consume_skb_any in lance_start_xmit
that can be called in hard irq and other contexts.

dev_consume_skb_any is used as lance_start_xmit always immediately
consumes the skb.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2014-03-24 21:18:53 -07:00
Eric W. Biederman
e21106b412 am79c961a: Call dev_consume_skb_any instead of dev_kfree_skb.
Replace dev_kfree_skb with dev_consume_skb_any in am79c961 that can
be called in hard irq and other contexts.

dev_consume_skb_any is used as am79c961_sendpacket always
immediately consumes the skb.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2014-03-24 21:18:40 -07:00
Eric W. Biederman
c99abc8b39 sun4i-emac: Call dev_consume_skb_any instead of dev_kfree_skb.
Replace dev_kfree_skb with dev_consume_skb_any in emacs_start_xmit
which can be called in hard irq and other contexts.

emac_start_xmit always transmits the packet making dev_consume_skb
the appropriate function to call.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2014-03-24 21:15:53 -07:00
Eric W. Biederman
21534d20fe bfin_mac: Call dev_consume_skb_any instead of dev_kfree_skb.
Replace dev_kfree_skb with dev_consume_skb_any in _tx_reclaim_skb that
can be called in hard irq and other contexts.

dev_consume_skb is used as _tx_reclaim_skb is called after a packet
has been successfully transmitted.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2014-03-24 15:25:30 -07:00
Eric W. Biederman
e05b310198 8390: Call dev_consume_skb_any instead of dev_kfree_skb.
Replace dev_kfree_skb with dev_consume_skb_any in __ei_start_xmit that
can be called in hard irq and other contexts.

dev_consume_skb is used as in this simple driver the skb is always
immediately consumed, there are no drops.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2014-03-24 15:22:02 -07:00
Eric W. Biederman
e5ddf351b1 3c59x: Call dev_consume_skb_any instead of dev_kfree_skb.
Replace dev_kfree_skb with dev_consume_skb_any in vortex_start_xmit
as it can be called in hard irq and other contexts.

dev_consume_skb_any is used when vortext_start_xmit directly consumes
the packet instead of dmaing it to the device.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2014-03-24 15:17:22 -07:00
Eric W. Biederman
8fa9524d6b 3c509: Call dev_consume_skb_any instead of dev_kfree_skb.
Replace dev_kfree_skb with dev_consume_skb_any in el3_start_xmit
as it can be called in hard irq and other contexts.

dev_consume_skb_any is used as on this simple hardware the
skb is consumed directly by the start_xmit function.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2014-03-24 15:14:59 -07:00
Eric W. Biederman
fabfb91d50 uml/net_kern: Call dev_consume_skb_any instead of dev_kfree_skb.
Replace dev_kfree_skb with dev_consume_skb_any in uml_net_start_xmit
as it can be called in hard irq and other contexts.

dev_consume_skb_any is used as uml_net_start_xmit typically
consumes (not drops) packets.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2014-03-24 15:13:35 -07:00
David S. Miller
35d499ee3a Merge git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/net-next
Jeff Kirsher says:

====================
Intel Wired LAN Driver Updates

This series contains updates to igb, ixgbe, ixgbevf, i40e and i40evf.

Anjali provides a i40e/i40evf patch to add Energy Efficient Ethernet
Low Power Idle stats and a fix for i40e to change the string
"Side Band" to "Sideband" for consistency.

Mitch provides 2 patches for i40evf to fix if the driver encounters
an error while communicating with the PF driver, do not shut down the
admin queue unconditionally.  Add an error message when the admin
queue message never completes and fix formatting on another message
that was unnecessarily wrapped.

Mark provides a ixgbe patch and five ixgbevf patches.  Fix a possible
infinite recursion when an adapter is removed and registers all read
as all one's in ixgbe_clear_vmdq_generic() and ixgbe_clear_rar_generic().
Converts macros to static inline functions to align kernel coding standard
and prepare for adding Live Error Recovery (LER) to ixgbevf.  Change the
ethtool register test to use the normal register accessor functions and
eliminate macors used for calling register test functions to make error
exits more clear.  Checks all register reads for adapter removal by checking
the status register after any register read that returns all F's since the
status register will never return 0xFFFFFFFF unless the adapter is removed.

Jacob implements SIOCGHWTSTAMP ioctl for igb which enables user processes
to read the current hardware stamp config settings non-destructively.

Todd adds the initial register read and write for surprise removal (LER)
for igb.

Christian Engelmayer fixes an igb memory leak in the igb_get_module_eeprom()
error handling path.

Ken Ichikawa provides a fix for igb, specifically for 82575 hardware to
specify -1 to the phc_index for ethtool's get_ts_info, otherwise a wrong
value will be set to the phc_index.

Christopher Paasch fixes a null pointer dereference in igb and makes sure
to unset the HAS_MSIX flag when the driver falls back to MSI only.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-24 12:45:16 -04:00
Li RongQing
0b8c7f6f2a ipv4: remove ip_rt_dump from route.c
ip_rt_dump do nothing after IPv4 route caches removal, so we can remove it.

Signed-off-by: Li RongQing <roy.qing.li@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-24 12:45:01 -04:00
wangweidong
dffe278f0a atheros/atlx: use SET_ETHTOOL_OPS directly
As commit a6e28b34205b("staging/et131x: use SET_ETHTOOL_OPS
directly"), using a wrapper around SET_ETHTOOL_OPS macro is
not actually required, remove and use SET_ETHTOOL_OPS directly.

Signed-off-by: Wang Weidong <wangweidong1@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-24 12:45:01 -04:00
Vince Bridgers
80175f93f3 Altera TSE: Correct two typos in original submission
This patch addresses two typos in the original driver submission. One derived
from a cut & paste error, and another is a misspelling.

Signed-off-by: Vince Bridgers <vbridgers2013@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-24 12:45:00 -04:00
Vince Bridgers
a804ad0e3b Altera TSE: Correct typecast issue detected by kbuild test robot
This patch addresses a portable pointer arithmetic issue in the
original submission found by the kbuild test robot.

config: make ARCH=i386 allyesconfig

   altera_sgdma.c: In function 'sgdma_txphysaddr':
>> altera_sgdma.c:393:33: warning: cast from
>> pointer to integer of different size [-Wpointer-to-int-cast]
     dma_addr_t offs = (dma_addr_t)((dma_addr_t)desc -
                                    ^
>> altera_sgdma.c:394:5: warning: cast from
>> pointer to integer of different size [-Wpointer-to-int-cast]
        (dma_addr_t)priv->tx_dma_desc);
        ^
   altera_sgdma.c: In function 'sgdma_rxphysaddr':
>> altera_sgdma.c:403:33: warning: cast from
>> pointer to integer of different size [-Wpointer-to-int-cast]
     dma_addr_t offs = (dma_addr_t)((dma_addr_t)desc -
                                    ^
>> altera_sgdma.c:404:5: warning: cast from
>> pointer to integer of different size [-Wpointer-to-int-cast]
        (dma_addr_t)priv->rx_dma_desc);
        ^

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Vince Bridgers <vbridgers2013@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-24 12:45:00 -04:00
Vince Bridgers
8adfc3ae45 Altera TSE: Set version number by driver's get regs
Set the version number returned by the driver's get regs routine
invoked by ethtool so formatting can be dependent on the version
number returned, and any interesting formatted output can check
the version number for specific types of register data returned.

Signed-off-by: Vince Bridgers <vbridgers2013@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-24 12:45:00 -04:00
David S. Miller
70abc79877 Merge branch 'qlcnic-next'
Shahed Shaikh says:

====================
This patch series containes following changes -

* TSO over IPv4 and IPv6, Tx checksum offload for VXLAN
* Rx checksum offload for VXLAN and support for .ndo_{add|del}_vxlan_port
  netdev ops.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-24 00:44:34 -04:00
Shahed Shaikh
8af7b7f81c qlcnic: Update version to 5.3.57
Signed-off-by: Shahed Shaikh <shahed.shaikh@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-24 00:44:24 -04:00
Shahed Shaikh
2b3d7b758c qlcnic: Add VXLAN Rx offload support
This patch adds Rx checksum offload support for VXLAN.
Implements .ndo_{add|del}_vxlan_port netdev ops.
Adapter supports only one VXLAN port, so program adapter with
very first UDP port which VXLAN driver is listening to.

Signed-off-by: Shahed Shaikh <shahed.shaikh@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-24 00:44:23 -04:00
Shahed Shaikh
381709de15 qlcnic: Add VXLAN Tx offload support
This patch adds LSO, LSO6 and Tx checksum offload support for VXLAN
encapsulated packets on 83xx/84xx series adapters.

Signed-off-by: Shahed Shaikh <shahed.shaikh@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-24 00:44:23 -04:00
Claudiu Manoil
c65d753372 gianfar: Fix P1010 config regression (SQ polling)
The P1010 device tree restricts the number of
supported interrupt groups to 1, although the eth
controller can support 2 interrupt groups and the
driver assumes the Multi-Group mode ("fsl,etsec2" model).

So, in this case the assumption that the Multi-Group
mode (MQ_MG_MODE) devices always support 2 interrupt
groups is false.  To fix this, a check for the actual
number of interrupt groups enabled in the board's
device tree has been added in gfar_probe for the
"fsl,etsec2" devices.

Without this fix, P1010 based boards claim support for
2 Tx queues to the net stack but only one is actually
allocated, leading to NULL access in xmit.  This issue
was introduced by enabling Single-Queue polling for
the P1010 devices.
(71ff9e3 gianfar: Use Single-Queue polling for
"fsl,etsec2")

Fixes: 71ff9e3df7
Signed-off-by: Claudiu Manoil <claudiu.manoil@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-24 00:40:44 -04:00
Li RongQing
4a4eb21fd6 ipv4: remove ipv4_ifdown_dst from route.c
ipv4_ifdown_dst does nothing after IPv4 route caches removal,
so we can remove it.

Signed-off-by: Li RongQing <roy.qing.li@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-24 00:18:44 -04:00
Eric Dumazet
99f0b958b1 net: optimize csum_replace2()
When changing one 16bit value by another in IP header, we can adjust
the IP checksum by doing a simple operation described in RFC 1624, as
reminded by David.

csum_partial() is a complex function on x86_64, not really suited for
small number of checksummed bytes.

I spotted csum_partial() being in the top 20 most consuming functions
(more than 1 %) in a GRO workload, which was rather unexpected.

The caller was inet_gro_complete() doing a csum_replace2() when
building the new IP header for the GRO packet.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-24 00:18:44 -04:00
David S. Miller
860b4042dd Included changes:
- use ether_addr_copy instead of memcpy when possible
 - implement new multicast packet optimisation
 - improve several kerneldoc sections
 - minor code cleanups
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Merge tag 'batman-adv-for-davem' of git://git.open-mesh.org/linux-merge

Antonio Quartulli says:

====================
Included changes:
- use ether_addr_copy instead of memcpy when possible
- implement new multicast packet optimisation
- improve several kerneldoc sections
- minor code cleanups

here you have our patchset for net-next/linux-3.15.  They are 16
patches but most of them are just small cleanups and kerneldoc
improvements.

The only big change is the one from patch 8 to 13 by Linus Lüssing
that introduces a new multicast packets optimisation. This new
component aims to reduce the air overhead by sending multicast packets
as bat-unicast when only one destination exists or by dropping them
directly at the source if the multicast group is totally empty.

In patch 11 Linus introduces an atomic_t variable, that like others
that we already have is only object of write and read, thus making the
atomic characteristic totally useless.  Unfortunately this is part of
our sysfs framework, that helps the developer to introduce new knobs
by using few macros only. For this reason we decided to keep Linus'
new knob for now, but I'd like to let you know that we are in the
process of re-working such framework in order to convert all the
current (useless) atomic_t to boolean in one go.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-22 15:00:22 -04:00
Simon Wunderlich
3f2532fcde batman-adv: Start new development cycle
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
2014-03-22 09:18:59 +01:00
Antonio Quartulli
151dcb3c56 batman-adv: improve DAT documentation
Add missing documentation for BATADV_DAT_ADDR_MAX and
convert an existing documentation to kerneldoc

Signed-off-by: Antonio Quartulli <antonio@open-mesh.com>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
2014-03-22 09:18:59 +01:00
Antonio Quartulli
43e6f65a3d batman-adv: improve the TT flags documentation
Convert the current documentation for the TT flags in proper
kerneldoc and improve it by adding an explanation for each
of the flags.

Signed-off-by: Antonio Quartulli <antonio@open-mesh.com>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
2014-03-22 09:18:59 +01:00
Linus Lüssing
4c8755d69c batman-adv: Send multicast packets to nodes with a WANT_ALL flag
With this patch a node sends IPv4 multicast packets to nodes which
have a BATADV_MCAST_WANT_ALL_IPV4 flag set and IPv6 multicast packets
to nodes which have a BATADV_MCAST_WANT_ALL_IPV6 flag set, too.

Why is this needed? There are scenarios involving bridges where
multicast report snooping and multicast TT announcements are not
sufficient, which would lead to packet loss for some nodes otherwise:

MLDv1 and IGMPv1/IGMPv2 have a suppression mechanism
for multicast listener reports. When we have an MLDv1/IGMPv1/IGMPv2
querier behind a bridge then our snooping bridge is potentially not
going to see any reports even though listeners exist because according
to RFC4541 such reports are only forwarded to multicast routers:

-----------------------------------------------------------
            ---------------
{Querier}---|Snoop. Switch|----{Listener}
            ---------------
                       \           ^
                      -------
                      | br0 |  <  ???
                      -------
                          \
                     _-~---~_
                 _-~/        ~-_
                ~   batman-adv  \-----{Sender}
                \~_   cloud    ~/
                   -~~__-__-~_/

I)  MLDv1 Query:  {Querier}  -> flooded
II) MLDv1 Report: {Listener} -> {Querier}

-> br0 cannot detect the {Listener}
=> Packets from {Sender} need to be forwarded to all
   detected listeners and MLDv1/IGMPv1/IGMPv2 queriers.

-----------------------------------------------------------

Note that we do not need to explicitly forward to MLDv2/IGMPv3 queriers,
because these protocols have no report suppression: A bridge has no
trouble detecting MLDv2/IGMPv3 listeners.

Even though we do not support bridges yet we need to provide the
according infrastructure already to not break compatibility later.

Signed-off-by: Linus Lüssing <linus.luessing@web.de>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
2014-03-22 09:18:58 +01:00
Linus Lüssing
ab49886e3d batman-adv: Add IPv4 link-local/IPv6-ll-all-nodes multicast support
With this patch a node may additionally perform the dropping or
unicasting behaviour for a link-local IPv4 and link-local-all-nodes
IPv6 multicast packet, too.

The extra counter and BATADV_MCAST_WANT_ALL_UNSNOOPABLES flag is needed
because with a future bridge snooping support integration a node with a
bridge on top of its soft interface is not able to reliably detect its
multicast listeners for IPv4 link-local and the IPv6
link-local-all-nodes addresses anymore (see RFC4541, section 2.1.2.2
and section 3).

Even though this new flag does make "no difference" now, it'll ensure
a seamless integration of multicast bridge support without needing to
break compatibility later.

Also note, that even with multicast bridge support it won't be possible
to optimize 224.0.0.x and ff02::1 towards nodes with bridges, they will
always receive these ranges.

Signed-off-by: Linus Lüssing <linus.luessing@web.de>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
2014-03-22 09:18:58 +01:00
Linus Lüssing
1d8ab8d3c1 batman-adv: Modified forwarding behaviour for multicast packets
With this patch a multicast packet is not always simply flooded anymore,
the behaviour for the following cases is changed to reduce
unnecessary overhead:

If all nodes within the horizon of a certain node have signalized
multicast listener announcement capability then an IPv6 multicast packet
with a destination of IPv6 link-local scope (excluding ff02::1) coming
from the upstream of this node...

* ...is dropped if there is no according multicast listener in the
  translation table,
* ...is forwarded via unicast if there is a single node with interested
  multicast listeners
* ...and otherwise still gets flooded.

Signed-off-by: Linus Lüssing <linus.luessing@web.de>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
2014-03-22 09:18:57 +01:00
Linus Lüssing
60432d756c batman-adv: Announce new capability via multicast TVLV
If the soft interface of a node is not part of a bridge then a node
announces a new multicast TVLV: The existence of this TVLV
signalizes that this node is announcing all of its multicast listeners
via the translation table infrastructure.

Signed-off-by: Linus Lüssing <linus.luessing@web.de>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
2014-03-22 09:18:57 +01:00
Linus Lüssing
e17931d1a6 batman-adv: introduce capability initialization bitfield
The new bitfield allows us to keep track whether capability subsets of
an originator have gone through their initialization phase yet.

The translation table is the only user right now, but a new one will be
added soon.

Signed-off-by: Linus Lüssing <linus.luessing@web.de>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
2014-03-22 09:18:56 +01:00
Linus Lüssing
c5caf4ef34 batman-adv: Multicast Listener Announcements via Translation Table
With this patch a node which has no bridge interface on top of its soft
interface announces its local multicast listeners via the translation
table.

Signed-off-by: Linus Lüssing <linus.luessing@web.de>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
2014-03-22 09:18:56 +01:00
Antonio Quartulli
c5d3a652a3 batman-adv: add kerneldoc for dst_hint argument
Some helper functions used along the TX path have now a new
"dst_hint" argument but the kerneldoc was missing.

Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
2014-03-22 08:50:26 +01:00