Now that we can tell whether GRO is being applied, this heuristic is
effective once more.
Signed-off-by: NBen Hutchings <bhutchings@solarflare.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

When GRO is successfully merging received packets, we should allocate
raw page buffers rather than skbs that will be discarded by GRO.
Otherwise, we should allocate skbs.

GRO also benefits from higher interrupt moderation, so increase the
score for mergeable RX packets.
Signed-off-by: NBen Hutchings <bhutchings@solarflare.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This will allow drivers to adjust their receive path dynamically
based on whether GRO is being applied successfully.

Currently all in-tree callers ignore the return values of these
functions and do not need to be changed.
Signed-off-by: NBen Hutchings <bhutchings@solarflare.com>
Acked-by: NHerbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This clarifies which return and parameter types are GRO result codes
and not RX result codes.
Signed-off-by: NBen Hutchings <bhutchings@solarflare.com>
Acked-by: NHerbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Currently PACKET_TX_RING forces certain amount of every frame to remain
unused. This probably originates from an early version of the
PACKET_TX_RING patch that in fact used the extra space when the (since
removed) CONFIG_PACKET_MMAP_ZERO_COPY option was enabled. The current
code does not make any use of this extra space.

This patch removes the extra space reservation and lets userspace make
use of the full frame size.
Signed-off-by: NGabor Gombas <gombasg@sztaki.hu>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

proto_ops->getname implies copying protocol specific data
into storage unit (particulary to __kernel_sockaddr_storage).
So when we implement new protocol support we should keep such
a detail in mind (which is easy to forget about).

Lets introduce DECLARE_SOCKADDR helper which check if
storage unit is not overfowed at build time.

Eventually inet_getname is switched to use DECLARE_SOCKADDR
(to show example of usage).
Signed-off-by: NCyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Some workloads hit dev_base_lock rwlock pretty hard.
We can use RCU lookups to avoid touching this rwlock.

netdevices are already freed after a RCU grace period, so this patch
adds no penalty at device dismantle time.

dev_ifname() converted to dev_get_by_index_rcu()
Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The variables are unsigned so the `< 0' test always fails, the
other part of the test catches wrapped values.
Signed-off-by: NRoel Kluin <roel.kluin@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

optlen is unsigned so the `< 0' test is never true.
Signed-off-by: NRoel Kluin <roel.kluin@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

If there is data, the unsigned skb->len is greater than 0.

rt.sigdigits is unsigned as well, so the test `>= 0' is
always true, the other part of the test catches wrapped
values.
Signed-off-by: NRoel Kluin <roel.kluin@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Replace the sequence of strcmp calls for interpreting ZSAU parameter
strings by a table of known strings and lookup loop to improve
readability.

Impact: readability improvement, no functional change
Signed-off-by: NTilman Schmidt <tilman@imap.cc>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

On more step towards the holy grail of checkpatch.pl silence.

Impact: cosmetic
Signed-off-by: NTilman Schmidt <tilman@imap.cc>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

On the quest for the holy grail of checkpatch.pl silence.

Impact: cosmetic
Signed-off-by: NTilman Schmidt <tilman@imap.cc>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Duly uglified as demanded by checkpatch.pl.

Impact: cosmetic
Signed-off-by: NTilman Schmidt <tilman@imap.cc>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Dum sanctis checkpatch.pl'ae legibus obsequimur.

Impact: cosmetic
Signed-off-by: NTilman Schmidt <tilman@imap.cc>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Reorganize the code of the Gigaset M10x driver to make it more
readable, less redundant, better aligned to the style of other
parts of the driver, and cause fewer checkpatch.pl complaints.

Impact: code reorganization, no functional change
Signed-off-by: NTilman Schmidt <tilman@imap.cc>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The CAPI interface incorrectly assumed that CAPI messages would always
start at the beginning of the data buffer: fix by treating DATA_B3
messages as the link layer header to their payload data. This fix
changes the way acknowledgement information is propagated through the
hardware specific modules and thereby impacts the ISDN4Linux variant
of the driver, too.

Also some assumptions about methods not being called from interrupt
context turned out to be unwarranted; fix by using dev_kfree_skb_any()
wherever non-interrupt context isn't guaranteed.

Impact: bugfix
Signed-off-by: NTilman Schmidt <tilman@imap.cc>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

A missing dot lead to garbage characters being included in the
dial command generated from a CAPI CONNECT_REQ message, which
interestingly enough worked anyway, illustrating the resilience
of the device.

Impact: bugfix
Signed-off-by: NTilman Schmidt <tilman@imap.cc>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Replace the "ignoring Additional Info" warning message by better
readable ones citing the specific subparameters being ignored.
Make parts of the code more readable by using a local cmsg
pointer variable.

Impact: readability improvement
Signed-off-by: NTilman Schmidt <tilman@imap.cc>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add and use no DSCAK bit in the features field.
Signed-off-by: NGilad Ben-Yossef <gilad@codefidence.com>
Sigend-off-by: NOri Finkelman <ori@comsleep.com>
Sigend-off-by: NYony Amit <yony@comsleep.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add and use no window scale bit in the features field.

Note that this is not the same as setting a window scale of 0
as would happen with window limit on route.
Signed-off-by: NGilad Ben-Yossef <gilad@codefidence.com>
Sigend-off-by: NOri Finkelman <ori@comsleep.com>
Sigend-off-by: NYony Amit <yony@comsleep.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Implement querying and acting upon the no timestamp bit in the feature
field.
Signed-off-by: NGilad Ben-Yossef <gilad@codefidence.com>
Sigend-off-by: NOri Finkelman <ori@comsleep.com>
Sigend-off-by: NYony Amit <yony@comsleep.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Implement querying and acting upon the no sack bit in the features
field.
Signed-off-by: NGilad Ben-Yossef <gilad@codefidence.com>
Sigend-off-by: NOri Finkelman <ori@comsleep.com>
Sigend-off-by: NYony Amit <yony@comsleep.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Adding an accessor to existing  dst_entry feautres field and
refactor the only supported feature (allfrag) to use it.
Signed-off-by: NGilad Ben-Yossef <gilad@codefidence.com>
Sigend-off-by: NOri Finkelman <ori@comsleep.com>
Sigend-off-by: NYony Amit <yony@comsleep.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

We need tcp_parse_options to be aware of dst_entry to
take into account per dst_entry TCP options settings
Signed-off-by: NGilad Ben-Yossef <gilad@codefidence.com>
Sigend-off-by: NOri Finkelman <ori@comsleep.com>
Sigend-off-by: NYony Amit <yony@comsleep.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Since we only use tcp_parse_options here to check for the exietence
of TCP timestamp option in the header, it is better to call with
the "established" flag on.
Signed-off-by: NGilad Ben-Yossef <gilad@codefidence.com>
Signed-off-by: NOri Finkelman <ori@comsleep.com>
Signed-off-by: NYony Amit <yony@comsleep.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

I found that the current version of drivers/net/usb/dm9601.c can be used to
successfully drive a low-power, low-cost network adapter with USB ID
0a46:9000, based on a DM9000E chipset. As no device with this ID is yet
present in the kernel, I have created a patch that adds support for the device
to the dm9601 driver.

Created and tested against linux-2.6.32-rc5.
Signed-off-by: NJanusz Krzysztofik <jkrzyszt@tis.icnet.pl>
Acked-by: NPeter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The mailbox command process would only process a maximum of 5 unrelated
firmware events while waiting for it's command completion status.
It should process an unlimited number of events while waiting for a maximum of 5 seconds.
Signed-off-by: NRon Mercer <ron.mercer@qlogic.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Clean up driver resources without touch the hardware. Add pci
save/restore state.
Signed-off-by: NRon Mercer <ron.mercer@qlogic.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Speedup module unloading by factorizing synchronize_rcu() calls
Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Speedup module unloading by factorizing synchronize_rcu() calls
Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Speedup module unloading by factorizing synchronize_rcu() calls
Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Speedup module unloading by factorizing synchronize_rcu() calls
Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Speedup module unloading by factorizing synchronize_rcu() calls
Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch adds the PCI IDs for the next generation chip to the
PCI_DEVICE_ID table.
Signed-off-by: NAjit Khaparde <ajitk@serverengines.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Augment raw_send_hdrinc to correct for incorrect ip header length values

A series of oopses was reported to me recently.  Apparently when using AF_RAW
sockets to send data to peers that were reachable via ipsec encapsulation,
people could panic or BUG halt their systems.

I've tracked the problem down to user space sending an invalid ip header over an
AF_RAW socket with IP_HDRINCL set to 1.

Basically what happens is that userspace sends down an ip frame that includes
only the header (no data), but sets the ip header ihl value to a large number,
one that is larger than the total amount of data passed to the sendmsg call.  In
raw_send_hdrincl, we allocate an skb based on the size of the data in the msghdr
that was passed in, but assume the data is all valid.  Later during ipsec
encapsulation, xfrm4_tranport_output moves the entire frame back in the skbuff
to provide headroom for the ipsec headers.  During this operation, the
skb->transport_header is repointed to a spot computed by
skb->network_header + the ip header length (ihl).  Since so little data was
passed in relative to the value of ihl provided by the raw socket, we point
transport header to an unknown location, resulting in various crashes.

This fix for this is pretty straightforward, simply validate the value of of
iph->ihl when sending over a raw socket.  If (iph->ihl*4U) > user data buffer
size, drop the frame and return -EINVAL.  I just confirmed this fixes the
reported crashes.
Signed-off-by: NNeil Horman <nhorman@tuxdriver.com>
Acked-by: NEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

When changing flow control (pause) parameters, the flow control thresholds
(i.e. when to send XON/XOFF frames) may not be setup correctly on parts
with copper media.  Call the existing e1000_set_fc_watermarks()
function to set these thresholds.
Signed-off-by: NBruce Allan <bruce.w.allan@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>