11 years agoRDS: Fix completion notifications on blocking sockets
Andy Grover [Fri, 17 Jul 2009 13:13:32 +0000]
RDS: Fix completion notifications on blocking sockets

Completion or congestion notifications were not being checked
if the socket went to sleep. This patch fixes that.

Signed-off-by: Andy Grover <andy.grover@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agoRDS/IB: Drop connection when a fatal QP event is received
Andy Grover [Fri, 17 Jul 2009 13:13:31 +0000]
RDS/IB: Drop connection when a fatal QP event is received

Signed-off-by: Andy Grover <andy.grover@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agoRDS/IB: Disable flow control in sysctl and explain why
Andy Grover [Fri, 17 Jul 2009 13:13:30 +0000]
RDS/IB: Disable flow control in sysctl and explain why

Backwards compatibility with rds 3.0 causes protocol-
based flow control to be disabled as a side-effect.

I don't want to pull out FC support from the IB transport
but I do want to document and keep the sysctl consistent
if possible.

Signed-off-by: Andy Grover <andy.grover@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agoRDS/IB: Move tx/rx ring init and refill to later
Andy Grover [Fri, 17 Jul 2009 13:13:29 +0000]
RDS/IB: Move tx/rx ring init and refill to later

Since RDS 3.0 and 3.1 have different packet formats,
we need to wait until after protocol negotiation
is complete to layout the rx buffers.

Signed-off-by: Andy Grover <andy.grover@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agoRDS: Don't set c_version in __rds_conn_create()
Andy Grover [Fri, 17 Jul 2009 13:13:28 +0000]
RDS: Don't set c_version in __rds_conn_create()

Protocol negotiation is logically a property of the
transports, so rds core need not set it.

Signed-off-by: Andy Grover <andy.grover@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agoRDS/IB: Rename byte_len to data_len to enhance readability
Andy Grover [Fri, 17 Jul 2009 13:13:27 +0000]
RDS/IB: Rename byte_len to data_len to enhance readability

Of course len is in bytes. Calling it data_len hopefully indicates
a little better what the variable is actually for.

Signed-off-by: Andy Grover <andy.grover@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agoRDS/RDMA: Fix cut-n-paste errors in printks in rdma_transport.c
Andy Grover [Fri, 17 Jul 2009 13:13:26 +0000]
RDS/RDMA: Fix cut-n-paste errors in printks in rdma_transport.c

Signed-off-by: Andy Grover <andy.grover@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agoRDS/IB: Fix printk to indicate remote IP, not local
Andy Grover [Fri, 17 Jul 2009 13:13:25 +0000]
RDS/IB: Fix printk to indicate remote IP, not local

Signed-off-by: Andy Grover <andy.grover@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agoRDS/IB: Handle connections using RDS 3.0 wire protocol
Andy Grover [Fri, 17 Jul 2009 13:13:24 +0000]
RDS/IB: Handle connections using RDS 3.0 wire protocol

The big differences between RDS 3.0 and 3.1 are protocol-level
flow control, and with 3.1 the header is in front of the data. The header
always ends up in the header buffer, and the data goes in the data page.

In 3.0 our "header" is a trailer, and will end up either in the data
page, the header buffer, or split across the two. Since 3.1 is backwards-
compatible with 3.0, we need to continue to support these cases. This
patch does that -- if using RDS 3.0 wire protocol, it will copy the header
from wherever it ended up into the header buffer.

Signed-off-by: Andy Grover <andy.grover@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agoRDS/IB: Improve RDS protocol version checking
Andy Grover [Fri, 17 Jul 2009 13:13:23 +0000]
RDS/IB: Improve RDS protocol version checking

RDS on IB uses privdata to do protocol version negotiation. Apparently
the IB stack will return a larger privdata buffer than the struct we were
expecting. Just to be extra-sure, this patch adds some checks in this area.

Signed-off-by: Andy Grover <andy.grover@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agoRDS: Set retry_count to 2 and make modifiable via modparam
Andy Grover [Fri, 17 Jul 2009 13:13:22 +0000]
RDS: Set retry_count to 2 and make modifiable via modparam

This will be default cause IB connections to failover faster,
but allow a longer retry count to be used if desired.

Signed-off-by: Andy Grover <andy.grover@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agonet: explain netns notifiers a little better
Johannes Berg [Wed, 15 Jul 2009 06:16:34 +0000]
net: explain netns notifiers a little better

Eric explained this to me -- and afterwards the comment
made sense, but not before. Add the the critical point
about interfaces having to be gone from the netns before
subsys notifiers are called.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agob44: strncpy does not null terminate string
roel kluin [Fri, 17 Jul 2009 08:01:54 +0000]
b44: strncpy does not null terminate string

strlcpy() will always null terminate the string. Also use the
sizeof(version) to strlcopy() the version string.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agoipv4: fib_trie: Use tnode_get_child_rcu() and node_parent_rcu() in lookups
Jarek Poplawski [Tue, 14 Jul 2009 11:20:32 +0000]
ipv4: fib_trie: Use tnode_get_child_rcu() and node_parent_rcu() in lookups

While looking for other fib_trie problems reported by Pawel Staszewski
I noticed there are a few uses of tnode_get_child() and node_parent()
in lookups instead of their rcu versions.

Signed-off-by: Jarek Poplawski <jarkao2@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agoipv4: Fix inflate_threshold_root automatically
Jarek Poplawski [Tue, 14 Jul 2009 09:41:00 +0000]
ipv4: Fix inflate_threshold_root automatically

During large updates there could be triggered warnings like: "Fix
inflate_threshold_root. Now=25 size=11 bits" if inflate() of the root
node isn't finished in 10 loops. It should be much rarer now, after
changing the threshold from 15 to 25, and a temporary problem, so
this patch tries to handle it automatically using a fix variable to
increase by one inflate threshold for next root resizes (up to the 35
limit, max fix = 10). The fix variable is decreased when root's
inflate() finishes below 7 loops (even if some other, smaller table/
trie is updated -- for simplicity the fix variable is global for now).

Reported-by: Pawel Staszewski <pstaszewski@itcare.pl>
Reported-by: Jorge Boncompte [DTI2] <jorge@dti2.net>
Tested-by: Pawel Staszewski <pstaszewski@itcare.pl>
Signed-off-by: Jarek Poplawski <jarkao2@gmail.com>
Signed-off-by: Robert Olsson <robert.olsson@its.uu.se>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agoipv4: Use synchronize_rcu() during trie_rebalance()
Jarek Poplawski [Tue, 14 Jul 2009 08:33:08 +0000]
ipv4: Use synchronize_rcu() during trie_rebalance()

During trie_rebalance() we free memory after resizing with call_rcu(),
but large updates, especially with PREEMPT_NONE configs, can cause
memory stresses, so this patch calls synchronize_rcu() in
tnode_free_flush() after each sync_pages to guarantee such freeing
(especially before resizing the root node).

The value of sync_pages = 128 is based on Pawel Staszewski's tests as
the lowest which doesn't hinder updating times. (For testing purposes
there was a sysfs module parameter to change it on demand, but it's
removed until we're sure it could be really useful.)

The patch is based on suggestions by: Paul E. McKenney
<paulmck@linux.vnet.ibm.com>

Reported-by: Pawel Staszewski <pstaszewski@itcare.pl>
Tested-by: Pawel Staszewski <pstaszewski@itcare.pl>
Signed-off-by: Jarek Poplawski <jarkao2@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agovlan: Propagate physical MTU changes
Herbert Xu [Mon, 20 Jul 2009 14:35:37 +0000]
vlan: Propagate physical MTU changes

When the physical MTU changes we want to ensure that all existing
VLAN device MTUs do not exceed the new underlying MTU.  This patch
adds that propagation.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agoconnector: get test code working by default
Mike Frysinger [Fri, 17 Jul 2009 17:14:26 +0000]
connector: get test code working by default

The connector test code currently does not work out of the box.  This is
because it uses a connector id that is above the registered limit.  So
rather than force people to stumble through undocumented code wondering
why it isn't working, have the test code use one of the "private" ids by
default.  While I'm in here, clean up the code (kernel and user app) so
that it's a bit more user friendly and verbose in significant things that
it does.  Terse test code wastes people time as they simply enumerate it
with all the same kind of debug messages to get a better feel of what code
is running at any time.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agoconnector: clean up grammar/style in documentation
Mike Frysinger [Fri, 17 Jul 2009 17:13:58 +0000]
connector: clean up grammar/style in documentation

The grammar in most of this file is slightly off, and some sections are
hard to read due to lack of visual clues breaking up related material.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agoconnector: make callback argument type explicit
Mike Frysinger [Fri, 17 Jul 2009 17:13:21 +0000]
connector: make callback argument type explicit

The connector documentation states that the argument to the callback
function is always a pointer to a struct cn_msg, but rather than encode it
in the API itself, it uses a void pointer everywhere.  This doesn't make
much sense to encode the pointer in documentation as it prevents proper C
type checking from occurring and can easily allow people to use the wrong
pointer type.  So convert the argument type to an explicit struct cn_msg
pointer.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agotun: Allow tap device to send/receive UFO packets.
Sridhar Samudrala [Tue, 14 Jul 2009 14:21:04 +0000]
tun: Allow tap device to send/receive UFO packets.

- Allow setting UFO on tap device and handle UFO packets.

Signed-off-by: Sridhar Samudrala <sri@us.ibm.com>

---------------------------------------------------------
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agovirtio-net: Allow UFO feature to be set and advertised.
Sridhar Samudrala [Tue, 14 Jul 2009 14:21:02 +0000]
virtio-net: Allow UFO feature to be set and advertised.

- Allow setting UFO on virtio-net and advertise to host.

Signed-off-by: Sridhar Samudrala <sri@us.ibm.com>
Acked-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agoixgbe: Bump version number
Peter P Waskiewicz Jr [Thu, 16 Jul 2009 15:51:11 +0000]
ixgbe: Bump version number

Keep the version number marching along as updates come in.

Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agoixgbe: Add device support for a new copper 82598 device
Peter P Waskiewicz Jr [Thu, 16 Jul 2009 15:50:52 +0000]
ixgbe: Add device support for a new copper 82598 device

This adds support for a new copper device for 82598, device id 0x150b.

Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agoixgbe: Make sure boolean assignments from bitwise operations done correctly
Peter P Waskiewicz Jr [Thu, 16 Jul 2009 15:50:32 +0000]
ixgbe: Make sure boolean assignments from bitwise operations done correctly

When the link comes up, the driver detects which flow control settings are
active.  This is done using bitwise operations directly from the hardware
registers, and assumes the proper boolean assignment.  Make this an
explicit boolean value before assignment to the bool.

Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agoixgbe: Remove legacy descriptor support
Peter P Waskiewicz Jr [Thu, 16 Jul 2009 15:50:12 +0000]
ixgbe: Remove legacy descriptor support

The ethtool offline test is the only consumer of the legacy descriptors.
Update that path to only use advanced descriptors, and remove all support
for legacy descriptors.

Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agoudp: cleanups
Eric Dumazet [Fri, 17 Jul 2009 00:26:32 +0000]
udp: cleanups

Pure style cleanups.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agofs_enet/mii-fec.c: fix MII speed calculation
Wolfgang Denk [Fri, 17 Jul 2009 02:27:07 +0000]
fs_enet/mii-fec.c: fix MII speed calculation

The MII speed calculation was based on the CPU clock (ppc_proc_freq),
but for MPC512x we must use the bus clock instead.

This patch makes it use the correct clock and makes sure we don't
clobber reserved bits in the MII_SPEED register.

Signed-off-by: Wolfgang Denk <wd@denx.de>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Kumar Gala <galak@kernel.crashing.org>
Cc: <netdev@vger.kernel.org>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agoMerge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
David S. Miller [Fri, 17 Jul 2009 03:21:24 +0000]
Merge branch 'master' of /linux/kernel/git/davem/net-2.6

Conflicts:
drivers/net/wireless/orinoco/main.c

11 years agocdc-eem: bad crc checking
Vincent CUISSARD [Thu, 16 Jul 2009 06:08:58 +0000]
cdc-eem: bad crc checking

When the driver received an EEM packet with CRC option enabled, driver must
compute and check the CRC of the Ethernet data. Previous version computes CRC
on Ethernet data plus the original CRC value. Skbuff is correctly trimed but
the old length is used when CRC is computed.

Signed-off-by: Vincent CUISSARD <vincent.cuissard@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agoixgbe: Remove DPRINTK messages in DCB mode
Lucy Liu [Thu, 16 Jul 2009 13:43:31 +0000]
ixgbe: Remove DPRINTK messages in DCB mode

Remove debug DPRINTK in DCB mode netlink interface.

Signed-off-by: Lucy Liu <lucy.liu@intel.com>
Acked-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agoixgbe: clear mac address data block in DCB mode
Lucy Liu [Thu, 16 Jul 2009 13:43:10 +0000]
ixgbe: clear mac address data block in DCB mode

This change clears the address data block memory space, which is needed for
the 82598 which does not have a SAN MAC.

Signed-off-by: Lucy Liu <lucy.liu@intel.com>
Acked-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agosky2: revert shutdown changes
Stephen Hemminger [Thu, 16 Jul 2009 13:20:57 +0000]
sky2: revert shutdown changes

The commit changes to shutdown path broke startup on some systems.

revert commit c0bad0f2e4366d5bbfe0c4a7a80bca8f4b05272b

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agonet: sock_copy() fixes
Eric Dumazet [Wed, 15 Jul 2009 23:13:10 +0000]
net: sock_copy() fixes

Commit e912b1142be8f1e2c71c71001dc992c6e5eb2ec1
(net: sk_prot_alloc() should not blindly overwrite memory)
took care of not zeroing whole new socket at allocation time.

sock_copy() is another spot where we should be very careful.
We should not set refcnt to a non null value, until
we are sure other fields are correctly setup, or
a lockless reader could catch this socket by mistake,
while not fully (re)initialized.

This patch puts sk_node & sk_refcnt to the very beginning
of struct sock to ease sock_copy() & sk_prot_alloc() job.

We add appropriate smp_wmb() before sk_refcnt initializations
to match our RCU requirements (changes to sock keys should
be committed to memory before sk_refcnt setting)

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agoE100: work around the driver using streaming DMA mapping for RX descriptors.
Krzysztof Halasa [Tue, 14 Jul 2009 11:01:54 +0000]
E100: work around the driver using streaming DMA mapping for RX descriptors.

E100 places it's RX packet descriptors inside skb->data and uses them
with bidirectional streaming DMA mapping. Unfortunately it fails to
transfer skb->data ownership to the device after it reads the
descriptor's status, breaking on non-coherent (e.g., ARM) platforms.

This have to be converted to use coherent memory for the descriptors.

Signed-off-by: Krzysztof Halasa <khc@pm.waw.pl>
Acked-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agobonding: clean muticast addresses when device changes type
Moni Shoua [Wed, 15 Jul 2009 04:56:31 +0000]
bonding: clean muticast addresses when device changes type

Bonding device forbids slave device of different types under the same
master.

However, it is possible for a bonding master to change type during its
lifetime.  This can be either from ARPHRD_ETHER to ARPHRD_INFINIBAND
or the other way arround.  The change of type requires device level
multicast address cleanup because device level multicast addresses
depend on the device type.

The patch adds a call to dev_close() before the bonding master changes
type and dev_open() just after that.

In the example below I enslaved an IPoIB device (ib0) under
bond0. Since each bonding master starts as device of type ARPHRD_ETHER
by default, a change of type occurs when ib0 is enslaved.

This is how /proc/net/dev_mcast looks like without the patch

5    bond0           1     0     00ffffffff12601bffff000000000001ff96ca05
5    bond0           1     0     01005e000116
5    bond0           1     0     01005e7ffffd
5    bond0           1     0     01005e000001
5    bond0           1     0     333300000001
6    ib0             1     0     00ffffffff12601bffff000000000001ff96ca05
6    ib0             1     0     333300000001
6    ib0             1     0     01005e000001
6    ib0             1     0     01005e7ffffd
6    ib0             1     0     01005e000116
6    ib0             1     0     00ffffffff12401bffff00000000000000000001
6    ib0             1     0     00ffffffff12601bffff00000000000000000001

and this is how it looks like after the patch.

5    bond0           1     0     00ffffffff12601bffff000000000001ff96ca05
5    bond0           1     0     00ffffffff12601bffff00000000000000000001
5    bond0           1     0     00ffffffff12401bffff0000000000000ffffffd
5    bond0           1     0     00ffffffff12401bffff00000000000000000116
5    bond0           1     0     00ffffffff12401bffff00000000000000000001
6    ib0             1     0     00ffffffff12601bffff000000000001ff96ca05
6    ib0             1     0     00ffffffff12401bffff00000000000000000116
6    ib0             1     0     00ffffffff12401bffff0000000000000ffffffd
6    ib0             2     0     00ffffffff12401bffff00000000000000000001
6    ib0             2     0     00ffffffff12601bffff00000000000000000001

Signed-off-by: Moni Shoua <monis@voltaire.com>
Signed-off-by: Jay Vosburgh <fubar@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agoatl1c: misplaced parenthesis
roel kluin [Sun, 12 Jul 2009 12:57:38 +0000]
atl1c: misplaced parenthesis

Fix misplaced parenthesis

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agoatl1c: add missing parentheses
roel kluin [Sun, 12 Jul 2009 11:40:34 +0000]
atl1c: add missing parentheses

Parentheses are required or the comparison occurs before the bitand.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agoMerge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/kaber/nf-2.6
David S. Miller [Fri, 17 Jul 2009 00:34:50 +0000]
Merge branch 'master' of git://git./linux/kernel/git/kaber/nf-2.6

11 years agonetfilter: nf_conntrack: nf_conntrack_alloc() fixes
Eric Dumazet [Thu, 16 Jul 2009 12:03:40 +0000]
netfilter: nf_conntrack: nf_conntrack_alloc() fixes

When a slab cache uses SLAB_DESTROY_BY_RCU, we must be careful when allocating
objects, since slab allocator could give a freed object still used by lockless
readers.

In particular, nf_conntrack RCU lookups rely on ct->tuplehash[xxx].hnnode.next
being always valid (ie containing a valid 'nulls' value, or a valid pointer to next
object in hash chain.)

kmem_cache_zalloc() setups object with NULL values, but a NULL value is not valid
for ct->tuplehash[xxx].hnnode.next.

Fix is to call kmem_cache_alloc() and do the zeroing ourself.

As spotted by Patrick, we also need to make sure lookup keys are committed to
memory before setting refcount to 1, or a lockless reader could get a reference
on the old version of the object. Its key re-check could then pass the barrier.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>

11 years agonetfilter: xt_osf: fix nf_log_packet() arguments
Patrick McHardy [Thu, 16 Jul 2009 12:01:54 +0000]
netfilter: xt_osf: fix nf_log_packet() arguments

The first argument is the address family, the second one the hook
number.

Signed-off-by: Patrick McHardy <kaber@trash.net>

11 years agogianfar: remove unused DECLARE_MAC_BUF
Johannes Berg [Wed, 15 Jul 2009 18:31:10 +0000]
gianfar: remove unused DECLARE_MAC_BUF

The use of it was converted to %pM, but the variable
stuck -- remove it now to not cause spurious warnings.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agonet/can: add module alias to can protocol drivers
Lothar Waßmann [Tue, 14 Jul 2009 23:12:25 +0000]
net/can: add module alias to can protocol drivers

Add appropriate MODULE_ALIAS() to facilitate autoloading of can protocol drivers

Signed-off-by: Lothar Wassmann <LW@KARO-electronics.de>
Acked-by: Oliver Hartkopp <oliver@hartkopp.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agonet/can bugfix: use after free bug in can protocol drivers
Lothar Waßmann [Tue, 14 Jul 2009 23:10:21 +0000]
net/can bugfix: use after free bug in can protocol drivers

Fix a use after free bug in can protocol drivers

The release functions of the can protocol drivers lack a call to
sock_orphan() which leads to referencing freed memory under certain
circumstances.

This patch fixes a bug reported here:
https://lists.berlios.de/pipermail/socketcan-users/2009-July/000985.html

Signed-off-by: Lothar Wassmann <LW@KARO-electronics.de>
Acked-by: Oliver Hartkopp <oliver@hartkopp.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agonet/compat/wext: send different messages to compat tasks
Johannes Berg [Wed, 1 Jul 2009 11:26:02 +0000]
net/compat/wext: send different messages to compat tasks

Wireless extensions have the unfortunate problem that events
are multicast netlink messages, and are not independent of
pointer size. Thus, currently 32-bit tasks on 64-bit platforms
cannot properly receive events and fail with all kinds of
strange problems, for instance wpa_supplicant never notices
disassociations, due to the way the 64-bit event looks (to a
32-bit process), the fact that the address is all zeroes is
lost, it thinks instead it is 00:00:00:00:01:00.

The same problem existed with the ioctls, until David Miller
fixed those some time ago in an heroic effort.

A different problem caused by this is that we cannot send the
ASSOCREQIE/ASSOCRESPIE events because sending them causes a
32-bit wpa_supplicant on a 64-bit system to overwrite its
internal information, which is worse than it not getting the
information at all -- so we currently resort to sending a
custom string event that it then parses. This, however, has a
severe size limitation we are frequently hitting with modern
access points; this limitation would can be lifted after this
patch by sending the correct binary, not custom, event.

A similar problem apparently happens for some other netlink
users on x86_64 with 32-bit tasks due to the alignment for
64-bit quantities.

In order to fix these problems, I have implemented a way to
send compat messages to tasks. When sending an event, we send
the non-compat event data together with a compat event data in
skb_shinfo(main_skb)->frag_list. Then, when the event is read
from the socket, the netlink code makes sure to pass out only
the skb that is compatible with the task. This approach was
suggested by David Miller, my original approach required
always sending two skbs but that had various small problems.

To determine whether compat is needed or not, I have used the
MSG_CMSG_COMPAT flag, and adjusted the call path for recv and
recvfrom to include it, even if those calls do not have a cmsg
parameter.

I have not solved one small part of the problem, and I don't
think it is necessary to: if a 32-bit application uses read()
rather than any form of recvmsg() it will still get the wrong
(64-bit) event. However, neither do applications actually do
this, nor would it be a regression.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agowext: optimise, comment and fix event sending
Johannes Berg [Wed, 24 Jun 2009 01:34:49 +0000]
wext: optimise, comment and fix event sending

The current function for sending events first allocates the
event stream buffer, and then an skb to copy the event stream
into. This can be done in one go. Also, the current function
leaks kernel data to userspace in a 4 uninitialised bytes,
initialise those explicitly. Finally also add a few useful
comments, as opposed to the current comments.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agowireless extensions: make netns aware
Johannes Berg [Wed, 24 Jun 2009 01:34:48 +0000]
wireless extensions: make netns aware

This makes wireless extensions netns aware. The
tasklet sending the events is converted to a work
struct so that we can rtnl_lock() in it.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agoRevert "NET: Fix locking issues in PPP, 6pack, mkiss and strip line disciplines."
David S. Miller [Tue, 14 Jul 2009 20:13:41 +0000]
Revert "NET: Fix locking issues in PPP, 6pack, mkiss and strip line disciplines."

This reverts commit adeab1afb7de89555c69aab5ca21300c14af6369.

As Alan Cox explained, the TTY layer changes that went recently
to get rid of the tty->low_latency stuff fixes this already,
and even for -stable it's the ->low_latency changes that should
go in to fix this, rather than this patch.

Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agoskbuff.h: Fix comment for NET_IP_ALIGN
Tobias Klauser [Mon, 13 Jul 2009 22:48:16 +0000]
skbuff.h: Fix comment for NET_IP_ALIGN

Use the correct function call for skb_reserve in the comment for
NET_IP_ALIGN.

Signed-off-by: Tobias Klauser <klto@zhaw.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agodrivers/net: using spin_lock_irqsave() in net_send_packet()
Dongdong Deng [Sun, 12 Jul 2009 20:27:06 +0000]
drivers/net: using spin_lock_irqsave() in net_send_packet()

spin_unlock_irq() will enable interrupt in net_send_packet(),
this patch changes it to spin_lock_irqsave/spin_lock_irqrestore,
so that it doesn't enable interrupts when already disabled,
and netconsole would work properly over cs89x0/isa-skeleton.

Call trace:
netconsole write_msg()
{
 ...
 -> spin_lock_irqsave();
        -> netpoll_send_udp()
          -> netpoll_send_skb()
            -> net_send_packet()
              ->...

 -> spin_unlock_irqrestore();
 ...
}

Signed-off-by: Dongdong Deng <dongdong.deng@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agoNET: phy_device, fix lock imbalance
Jiri Slaby [Mon, 13 Jul 2009 11:23:39 +0000]
NET: phy_device, fix lock imbalance

Don't forget to unlock a mutex in phy_scan_fixups on a fail path.

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agogre: fix ToS/DiffServ inherit bug
Andreas Jaggi [Tue, 14 Jul 2009 16:35:59 +0000]
gre: fix ToS/DiffServ inherit bug

Fixes two bugs:
- ToS/DiffServ inheritance was unintentionally activated when using impair fixed ToS values
- ECN bit was lost during ToS/DiffServ inheritance

Signed-off-by: Andreas Jaggi <aj@open.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agonet: Rename lookup_neigh_params function
Tobias Klauser [Mon, 13 Jul 2009 18:17:49 +0000]
net: Rename lookup_neigh_params function

Rename lookup_neigh_params to lookup_neigh_parms as the struct is named
neigh_parms and all other functions dealing with the struct carry
neigh_parms in their names.

Signed-off-by: Tobias Klauser <klto@zhaw.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agoigb: gcc-3.4.6 fix
Eric Dumazet [Mon, 13 Jul 2009 18:11:41 +0000]
igb: gcc-3.4.6 fix

forward declaration of inline function should be avoided, or
old gcc cannot compile.

Reported-by: Teck Choon Giam <giamteckchoon@gmail.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agoatlx: duplicate testing of MCAST flag
roel kluin [Sun, 12 Jul 2009 13:12:37 +0000]
atlx: duplicate testing of MCAST flag

Fix duplicate testing of MCAST flag

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Acked-by: Jay Cliburn <jcliburn@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agoNET: Fix locking issues in PPP, 6pack, mkiss and strip line disciplines.
Ralf Baechle [Mon, 13 Jul 2009 04:09:20 +0000]
NET: Fix locking issues in PPP, 6pack, mkiss and strip line disciplines.

Guido Trentalancia reports:

I am trying to use the kiss driver in the Linux kernel that is being
shipped with Fedora 10 but unfortunately I get the following oops:

mkiss: AX.25 Multikiss, Hans Albas PE1AYX
mkiss: ax0: crc mode is auto.
ADDRCONF(NETDEV_CHANGE): ax0: link becomes ready
------------[ cut here ]------------
WARNING: at kernel/softirq.c:77 __local_bh_disable+0x2f/0x83() (Not
tainted)
[...]
unloaded: microcode]
Pid: 0, comm: swapper Not tainted 2.6.27.25-170.2.72.fc10.i686 #1
 [<c042ddfb>] warn_on_slowpath+0x65/0x8b
 [<c06ab62b>] ? _spin_unlock_irqrestore+0x22/0x38
 [<c04228b4>] ? __enqueue_entity+0xe3/0xeb
 [<c042431e>] ? enqueue_entity+0x203/0x20b
 [<c0424361>] ? enqueue_task_fair+0x3b/0x3f
 [<c041f88c>] ? resched_task+0x3a/0x6e
 [<c06ab62b>] ? _spin_unlock_irqrestore+0x22/0x38
 [<c06ab4e2>] ? _spin_lock_bh+0xb/0x16
 [<c043255b>] __local_bh_disable+0x2f/0x83
 [<c04325ba>] local_bh_disable+0xb/0xd
 [<c06ab4e2>] _spin_lock_bh+0xb/0x16
 [<f8b6f600>] mkiss_receive_buf+0x2fb/0x3a6 [mkiss]
 [<c0572a30>] flush_to_ldisc+0xf7/0x198
 [<c0572b12>] tty_flip_buffer_push+0x41/0x51
 [<f89477f2>] ftdi_process_read+0x375/0x4ad [ftdi_sio]
 [<f8947a5a>] ftdi_read_bulk_callback+0x130/0x138 [ftdi_sio]
 [<c05d4bec>] usb_hcd_giveback_urb+0x63/0x93
 [<c05ea290>] uhci_giveback_urb+0xe5/0x15f
 [<c05eaabf>] uhci_scan_schedule+0x52e/0x767
 [<c05f6288>] ? psmouse_handle_byte+0xc/0xe5
 [<c054df78>] ? acpi_ev_gpe_detect+0xd6/0xe1
 [<c05ec5b0>] uhci_irq+0x110/0x125
 [<c05d4834>] usb_hcd_irq+0x40/0xa3
 [<c0465313>] handle_IRQ_event+0x2f/0x64
 [<c046642b>] handle_level_irq+0x74/0xbe
 [<c04663b7>] ? handle_level_irq+0x0/0xbe
 [<c0406e6e>] do_IRQ+0xc7/0xfe
 [<c0405668>] common_interrupt+0x28/0x30
 [<c056821a>] ? acpi_idle_enter_simple+0x162/0x19d
 [<c0617f52>] cpuidle_idle_call+0x60/0x92
 [<c0403c61>] cpu_idle+0x101/0x134
 [<c069b1ba>] rest_init+0x4e/0x50
 =======================
---[ end trace b7cc8076093467ad ]---
------------[ cut here ]------------
WARNING: at kernel/softirq.c:136 _local_bh_enable_ip+0x3d/0xc4()
[...]
Pid: 0, comm: swapper Tainted: G        W 2.6.27.25-170.2.72.fc10.i686
 [<c042ddfb>] warn_on_slowpath+0x65/0x8b
 [<c06ab62b>] ? _spin_unlock_irqrestore+0x22/0x38
 [<c04228b4>] ? __enqueue_entity+0xe3/0xeb
 [<c042431e>] ? enqueue_entity+0x203/0x20b
 [<c0424361>] ? enqueue_task_fair+0x3b/0x3f
 [<c041f88c>] ? resched_task+0x3a/0x6e
 [<c06ab62b>] ? _spin_unlock_irqrestore+0x22/0x38
 [<c06ab4e2>] ? _spin_lock_bh+0xb/0x16
 [<f8b6f642>] ? mkiss_receive_buf+0x33d/0x3a6 [mkiss]
 [<c04325f9>] _local_bh_enable_ip+0x3d/0xc4
 [<c0432688>] local_bh_enable_ip+0x8/0xa
 [<c06ab54d>] _spin_unlock_bh+0x11/0x13
 [<f8b6f642>] mkiss_receive_buf+0x33d/0x3a6 [mkiss]
 [<c0572a30>] flush_to_ldisc+0xf7/0x198
 [<c0572b12>] tty_flip_buffer_push+0x41/0x51
 [<f89477f2>] ftdi_process_read+0x375/0x4ad [ftdi_sio]
 [<f8947a5a>] ftdi_read_bulk_callback+0x130/0x138 [ftdi_sio]
 [<c05d4bec>] usb_hcd_giveback_urb+0x63/0x93
 [<c05ea290>] uhci_giveback_urb+0xe5/0x15f
 [<c05eaabf>] uhci_scan_schedule+0x52e/0x767
 [<c05f6288>] ? psmouse_handle_byte+0xc/0xe5
 [<c054df78>] ? acpi_ev_gpe_detect+0xd6/0xe1
 [<c05ec5b0>] uhci_irq+0x110/0x125
 [<c05d4834>] usb_hcd_irq+0x40/0xa3
 [<c0465313>] handle_IRQ_event+0x2f/0x64
 [<c046642b>] handle_level_irq+0x74/0xbe
 [<c04663b7>] ? handle_level_irq+0x0/0xbe
 [<c0406e6e>] do_IRQ+0xc7/0xfe
 [<c0405668>] common_interrupt+0x28/0x30
 [<c056821a>] ? acpi_idle_enter_simple+0x162/0x19d
 [<c0617f52>] cpuidle_idle_call+0x60/0x92
 [<c0403c61>] cpu_idle+0x101/0x134
 [<c069b1ba>] rest_init+0x4e/0x50
 =======================
---[ end trace b7cc8076093467ad ]---
mkiss: ax0: Trying crc-smack
mkiss: ax0: Trying crc-flexnet

The issue was, that the locking code in mkiss was assuming it was only
ever being called in process or bh context.  Fixed by converting the
involved locking code to use irq-safe locks.

Review of other networking line disciplines shows that 6pack, both sync
and async PPP and STRIP have similar issues.  The ppp_async one is the
most interesting one as it sorts out half of the issue as far back as
2004 in commit http://git.kernel.org/?p=linux/kernel/git/tglx/history.git;a=commitdiff;h=2996d8deaeddd01820691a872550dc0cfba0c37d

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Reported-by: Guido Trentalancia <guido@trentalancia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agodrivers/net/bonding: Adjust constant name
Julia Lawall [Sat, 11 Jul 2009 10:03:55 +0000]
drivers/net/bonding: Adjust constant name

AD_SHORT_TIMEOUT and AD_STATE_LACP_ACTIVITY have the same value, but
AD_STATE_LACP_ACTIVITY better reflects the intended semantics.

[ J adds: AD_STATE_LACP_ACTIVITY is a value defined by the standard, and
should be set here in accordance with 802.3ad 43.4.12; AD_SHORT_TIMEOUT
is a constant specific to the Linux 802.3ad implementation that happens
to have the same value ]

The semantic match that finds this problem is as follows:
(http://www.emn.fr/x-info/coccinelle/)

// <smpl>
@@
struct port_params p;
@@
* p.port_state |= AD_SHORT_TIMEOUT
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Jay Vosburgh <fubar@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agodropmon: remove duplicated #include
Huang Weiyi [Fri, 10 Jul 2009 15:33:49 +0000]
dropmon: remove duplicated #include

Remove duplicated #include('s) in
  include/linux/net_dropmon.h

Signed-off-by: Huang Weiyi <weiyi.huang@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agonet: remove redundant sched/ in net/Makefile
Changli Gao [Wed, 8 Jul 2009 18:06:47 +0000]
net: remove redundant sched/ in net/Makefile

Remove redundant sched/ in net/Makefile.

sched/ is contained in previous:
obj-$(CONFIG_NET) += ethernet/ 802/ sched/ netlink/,
so the later
obj-$(CONFIG_NET_SCHED) += sched/
isn't necessary.

Signed-off-by: Changli Gao <xiaosuo@gmail.com>
----
Makefile | 1 -
1 file changed, 1 deletion(-)
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agoudpv6: Handle large incoming UDP/IPv6 packets and support software UFO
Sridhar Samudrala [Thu, 9 Jul 2009 08:10:04 +0000]
udpv6: Handle large incoming UDP/IPv6 packets and support software UFO

- validate and forward GSO UDP/IPv6 packets from untrusted sources.
- do software UFO if the outgoing device doesn't support UFO.

Signed-off-by: Sridhar Samudrala <sri@us.ibm.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agoudpv6: Remove unused skb argument of ipv6_select_ident()
Sridhar Samudrala [Thu, 9 Jul 2009 08:10:01 +0000]
udpv6: Remove unused skb argument of ipv6_select_ident()

- move ipv6_select_ident() inline function to ipv6.h and remove the unused
  skb argument

Signed-off-by: Sridhar Samudrala <sri@us.ibm.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agoudpv6: Fix gso_size setting in ip6_ufo_append_data
Sridhar Samudrala [Thu, 9 Jul 2009 08:09:58 +0000]
udpv6: Fix gso_size setting in ip6_ufo_append_data

- fix gso_size setting for ipv6 fragment to be a multiple of 8 bytes.

Signed-off-by: Sridhar Samudrala <sri@us.ibm.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agoudpv6: Fix HW checksum support for outgoing UFO packets
Sridhar Samudrala [Thu, 9 Jul 2009 08:09:54 +0000]
udpv6: Fix HW checksum support for outgoing UFO packets

- add HW checksum support for outgoing large UDP/IPv6 packets destined for
  a UFO enabled device.

Signed-off-by: Sridhar Samudrala <sri@us.ibm.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agoudpv4: Handle large incoming UDP/IPv4 packets and support software UFO.
Sridhar Samudrala [Thu, 9 Jul 2009 08:09:47 +0000]
udpv4: Handle large incoming UDP/IPv4 packets and support software UFO.

- validate and forward GSO UDP/IPv4 packets from untrusted sources.
- do software UFO if the outgoing device doesn't support UFO.

Signed-off-by: Sridhar Samudrala <sri@us.ibm.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agonetdev: restore MTU change operation
Ben Hutchings [Thu, 9 Jul 2009 17:59:01 +0000]
netdev: restore MTU change operation

alloc_etherdev() used to install a default implementation of this
operation, but it must now be explicitly installed in struct
net_device_ops.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agonetdev: restore MAC address set and validate operations
Ben Hutchings [Thu, 9 Jul 2009 17:54:35 +0000]
netdev: restore MAC address set and validate operations

alloc_etherdev() used to install default implementations of these
operations, but they must now be explicitly installed in struct
net_device_ops.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agonet: move and export get_net_ns_by_pid
Johannes Berg [Fri, 10 Jul 2009 09:51:35 +0000]
net: move and export get_net_ns_by_pid

The function get_net_ns_by_pid(), to get a network
namespace from a pid_t, will be required in cfg80211
as well. Therefore, let's move it to net_namespace.c
and export it. We can't make it a static inline in
the !NETNS case because it needs to verify that the
given pid even exists (and return -ESRCH).

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agogenetlink: make netns aware
Johannes Berg [Fri, 10 Jul 2009 09:51:34 +0000]
genetlink: make netns aware

This makes generic netlink network namespace aware. No
generic netlink families except for the controller family
are made namespace aware, they need to be checked one by
one and then set the family->netnsok member to true.

A new function genlmsg_multicast_netns() is introduced to
allow sending a multicast message in a given namespace,
for example when it applies to an object that lives in
that namespace, a new function genlmsg_multicast_allns()
to send a message to all network namespaces (for objects
that do not have an associated netns).

The function genlmsg_multicast() is changed to multicast
the message in just init_net, which is currently correct
for all generic netlink families since they only work in
init_net right now. Some will later want to work in all
net namespaces because they do not care about the netns
at all -- those will have to be converted to use one of
the new functions genlmsg_multicast_allns() or
genlmsg_multicast_netns() whenever they are made netns
aware in some way.

After this patch families can easily decide whether or
not they should be available in all net namespaces. Many
genl families us it for objects not related to networking
and should therefore be available in all namespaces, but
that will have to be done on a per family basis.

Note that this doesn't touch on the checkpoint/restart
problem where network namespaces could be used, genl
families and multicast groups are numbered globally and
I see no easy way of changing that, especially since it
must be possible to multicast to all network namespaces
for those families that do not care about netns.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agonet: make namespace iteration possible under RCU
Johannes Berg [Fri, 10 Jul 2009 09:51:33 +0000]
net: make namespace iteration possible under RCU

All we need to take care of is using proper RCU list
add/del primitives and inserting a synchronize_rcu()
at one place to make sure the exit notifiers are run
after everybody has stopped iterating the list.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agonetlink: use call_rcu for netlink_change_ngroups
Johannes Berg [Fri, 10 Jul 2009 09:51:32 +0000]
netlink: use call_rcu for netlink_change_ngroups

For the network namespace work in generic netlink I need
to be able to call this function under rcu_read_lock(),
otherwise the locking becomes a nightmare and more locks
would be needed. Instead, just embed a struct rcu_head
(actually a struct listeners_rcu_head that also carries
the pointer to the memory block) into the listeners
memory so we can use call_rcu() instead of synchronising
and then freeing. No rcu_barrier() is needed since this
code cannot be modular.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agonetlink: remove unused exports
Johannes Berg [Fri, 10 Jul 2009 08:32:06 +0000]
netlink: remove unused exports

I added those myself in commits b4ff4f04 and 84659eb5,
but I see no reason now why they should be exported,
only generic netlink uses them which cannot be modular.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agosit: fix regression: do not release skb->dst before xmit
Sascha Hlusiak [Sun, 12 Jul 2009 03:30:52 +0000]
sit: fix regression: do not release skb->dst before xmit

The sit module makes use of skb->dst in it's xmit function, so since
93f154b594fe47 ("net: release dst entry in dev_hard_start_xmit()") sit
tunnels are broken, because the flag IFF_XMIT_DST_RELEASE is not
unset.

This patch unsets that flag for sit devices to fix this
regression.

Signed-off-by: Sascha Hlusiak <contact@saschahlusiak.de>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agonet: ip_push_pending_frames() fix
Eric Dumazet [Wed, 8 Jul 2009 14:20:42 +0000]
net: ip_push_pending_frames() fix

After commit 2b85a34e911bf483c27cfdd124aeb1605145dc80
(net: No more expensive sock_hold()/sock_put() on each tx)
we do not take any more references on sk->sk_refcnt on outgoing packets.

I forgot to delete two __sock_put() from ip_push_pending_frames()
and ip6_push_pending_frames().

Reported-by: Emil S Tantilov <emils.tantilov@gmail.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Tested-by: Emil S Tantilov <emils.tantilov@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agonet: sk_prot_alloc() should not blindly overwrite memory
Eric Dumazet [Wed, 8 Jul 2009 19:36:05 +0000]
net: sk_prot_alloc() should not blindly overwrite memory

Some sockets use SLAB_DESTROY_BY_RCU, and our RCU code correctness
depends on sk->sk_nulls_node.next being always valid. A NULL
value is not allowed as it might fault a lockless reader.

Current sk_prot_alloc() implementation doesnt respect this hypothesis,
calling kmem_cache_alloc() with __GFP_ZERO. Just call memset() around
the forbidden field.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 years agohwsim: make testmode_cmd static
Johannes Berg [Tue, 7 Jul 2009 09:00:55 +0000]
hwsim: make testmode_cmd static

sparse correctly complains about this, no reason
for it not to be static.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

11 years agocfg80211: disallow configuring unsupported interfaces
Johannes Berg [Tue, 7 Jul 2009 01:56:13 +0000]
cfg80211: disallow configuring unsupported interfaces

In order to force drivers to advertise their interface
types, don't just disallow creating new interfaces with
unadvertised types but also disallow setting them UP.
Additionally, add some validation on the operations the
drivers support.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

11 years agocfg80211: clean up naming once and for all
Johannes Berg [Tue, 7 Jul 2009 01:56:12 +0000]
cfg80211: clean up naming once and for all

We've named the registered devices 'drv' sometimes,
thinking of "driver", which is not what it is, it's
the internal representation of a wiphy, i.e. a
device. Let's clean up the naming once and and use
'rdev' aka 'registered device' everywhere.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

11 years agocfg80211: fix locking
Johannes Berg [Tue, 7 Jul 2009 01:56:11 +0000]
cfg80211: fix locking

Over time, a lot of locking issues have crept into
the smarts of cfg80211, so e.g. scan completion can
race against a new scan, IBSS join can race against
leaving an IBSS, etc.

Introduce a new per-interface lock that protects
most of the per-interface data that we need to keep
track of, and sprinkle assertions about that lock
everywhere. Some things now need to be offloaded to
work structs so that we don't require being able to
sleep in functions the drivers call. The exception
to that are the MLME callbacks (rx_auth etc.) that
currently only mac80211 calls because it was easier
to do that there instead of in cfg80211, and future
drivers implementing those calls will, if they ever
exist, probably need to use a similar scheme like
mac80211 anyway...

In order to be able to handle _deauth and _disassoc
properly, introduce a cookie passed to it that will
determine locking requirements.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

11 years agocfg80211: fix MFP bug, sparse warnings
Johannes Berg [Tue, 7 Jul 2009 01:56:10 +0000]
cfg80211: fix MFP bug, sparse warnings

sparse warns about a number of things, and one of them
(use_mfp shadowed variable) actually is a bug, fix all
of them.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

11 years agocfg80211: properly name driver locking
Johannes Berg [Tue, 7 Jul 2009 01:56:09 +0000]
cfg80211: properly name driver locking

Currently we call that cfg80211_put_dev(), but that is
misleading. With the new convention of using 'rdev' for
registered_device variables, also call that function
cfg80211_unlock_rdev().

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

11 years agocfg80211: warn again on spurious deauth
Johannes Berg [Tue, 7 Jul 2009 01:56:08 +0000]
cfg80211: warn again on spurious deauth

The original code in mac80211 could send a deauth
frame under certain circumstances even if nothing
had ever requested an authentication. This has been
fixed with the rework there, so cfg80211 can now
warn again about spurious events to catch possible
future drivers or mac80211 regressions.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

11 years agocfg80211: mlme API must be able to sleep
Johannes Berg [Tue, 7 Jul 2009 01:56:07 +0000]
cfg80211: mlme API must be able to sleep

After the mac80211 mlme cleanup, we can require that
the MLME functions in cfg80211 can sleep. This will
simplify future work in cfg80211 a lot.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

11 years agocfg80211: dont use union for wext
Johannes Berg [Tue, 7 Jul 2009 01:56:06 +0000]
cfg80211: dont use union for wext

Otherwise it becomes very hard to reset the structs
correctly since wext can be configured while the
interface is down.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

11 years agocfg80211: fix netdev down problem
Johannes Berg [Tue, 7 Jul 2009 01:56:05 +0000]
cfg80211: fix netdev down problem

We shouldn't be looking at the ssid_len for non-IBSS,
and for IBSS we should also return an error on trying
to leave an IBSS while not in or joining an IBSS.

This fixes an issue where we wouldn't disconnect() on
an interface being taken down since there's no SSID
configured this way.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

11 years agomac80211: refactor the WEP code to be directly usable
Johannes Berg [Tue, 7 Jul 2009 01:45:18 +0000]
mac80211: refactor the WEP code to be directly usable

The new key work for cfg80211 will only give us the WEP
key for shared auth to do that authentication, and not
via the regular key settings, so we need to be able to
encrypt a single frame in software, and that without a
key struct. Thus, refactor the WEP code to not require
a key structure but use the key, len and idx directly.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

11 years agomac80211: rework MLME for multiple authentications
Johannes Berg [Tue, 7 Jul 2009 01:45:17 +0000]
mac80211: rework MLME for multiple authentications

Sit tight. This shakes up the world as you know
it. Let go of your spaghetti tongs, they will no
longer be required, the horrible statemachine in
net/mac80211/mlme.c is no more...

With the cfg80211 SME mac80211 now has much less
to keep track of, but, on the other hand, for FT
it needs to be able to keep track of at least one
authentication being in progress while associated.
So convert from a single state machine to having
small ones for all the different things we need to
do. For real FT it will still need work wrt. PS,
but this should be a good step.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

11 years agomac80211: remove dead code from mlme
Johannes Berg [Tue, 7 Jul 2009 01:45:16 +0000]
mac80211: remove dead code from mlme

The ap_capab and last_probe struct members are unused.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

11 years agocfg80211: let SME control reassociation vs. association
Johannes Berg [Tue, 7 Jul 2009 12:37:26 +0000]
cfg80211: let SME control reassociation vs. association

Since we don't really know that well in the kernel,
let's let the SME control whether it wants to use
reassociation or not, by allowing it to give the
previous BSSID in the associate() parameters.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

11 years agop54: fix queue stall due to underrun
Christian Lamparter [Mon, 6 Jul 2009 13:18:13 +0000]
p54: fix queue stall due to underrun

Larry Finger discovered a weird behavior under load.
In essence, the queue's length count under runs,
which in turn renders the associated ac queue unusable.

Reported-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Christian Lamparter <chunkeey@web.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

11 years agop54usb: fix stalls caused by urb allocation failures
Christian Lamparter [Mon, 6 Jul 2009 13:17:56 +0000]
p54usb: fix stalls caused by urb allocation failures

This patch squashes a few old bugs, which have been around since
the initial version of p54usb in one form or another.

we never freed a orphaned frame, when were denied the resources,
which are necessary to pass the data into the usb subsystem.
As a result we could end up with a full queue that wasn't emptied,
until the device was brought down.

Signed-off-by: Christian Lamparter <chunkeey@web.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

11 years agorfkill: prep for rfkill API changes
Johannes Berg [Sun, 5 Jul 2009 12:51:06 +0000]
rfkill: prep for rfkill API changes

We've designed the /dev/rfkill API in a way that we
can increase the event struct by adding members at
the end, should it become necessary. To validate the
events, userspace and the kernel need to have the
proper event size to check for -- when reading from
the other end they need to verify that it's at least
version 1 of the event API, with the current struct
size, so define a constant for that and make the
code a little more 'future proof'.

Not that I expect that we'll have to change the event
size any time soon, but it's better to write the code
in a way that lends itself to extending.

Due to the current size of the event struct, the code
is currently equivalent, but should the event struct
ever need to be increased the new code might not need
changing.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

11 years agoath5k: write PCU registers on initial reset
Bob Copeland [Sun, 5 Jul 2009 01:03:13 +0000]
ath5k: write PCU registers on initial reset

"Ath5k: unify resets"
introduced a regression into 2.6.28 where the PCU registers are never
initialized, due to ath5k_reset() always passing true for change_channel.
We subsequently program a lot of these registers but several may start
in an unknown state.

Cc: stable@kernel.org
Reported-by: Forrest Zhang <forrest@hifulltech.com>
Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

11 years agoath5k: do not release irq across suspend/resume
Bob Copeland [Sat, 4 Jul 2009 16:59:54 +0000]
ath5k: do not release irq across suspend/resume

Paraphrasing Rafael J. Wysocki: "drivers should not release PCI IRQs
in suspend."  Doing so causes a warning during suspend/resume on some
platforms.

Cc: Rafael J. Wysocki <rjw@sisk.pl>
Reported-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

11 years agoath: remove unnecessary return in ath_regd_get_band_ctl
Bob Copeland [Sat, 4 Jul 2009 16:59:53 +0000]
ath: remove unnecessary return in ath_regd_get_band_ctl

'default' case already returns NO_CTL

Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

11 years agoath5k: rework beacon configuration
Bob Copeland [Sat, 4 Jul 2009 16:59:52 +0000]
ath5k: rework beacon configuration

Using the enable_beacon flag allows some simplifications and fixes
some corner cases in beacon handling.  This change adds a state
variable for beaconing in ath5k_beacon_config and handles both
enabling and disabling, thus eliminating the need for
ath5k_beacon_disable.  We also now configure the beacon when any
of the beacon parameters change, so ath5k_beacon_reconfig is no
longer needed (its mmiowb gets moved to ath5k_beacon_config).
Finally, by locking around the whole config function, we don't
need to worry about clearing the interrupt mask register before
installing the new mask.

The upshot is this correctly disables beaconing when the interfaces
are taken down, it fixes a potential restarting of beaconing
when ath5k_reset() is called, and ensures that updates to the
beacon interval take effect immediately.

Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

11 years agoath5k: send buffered frames after the beacon
Bob Copeland [Sat, 4 Jul 2009 16:59:51 +0000]
ath5k: send buffered frames after the beacon

Enable the "Content" After Beacon queue and utilize it to send
any buffered frames for power-saving clients.

Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

11 years agop54spi: remove dead code and definitions
Christian Lamparter [Sat, 4 Jul 2009 15:49:59 +0000]
p54spi: remove dead code and definitions

This patch removes some dead code:
p54spi.c:115: warning: ‘p54spi_read16’ defined but not used

and while we're at it, p54spi_registers_array is purged as well.

Signed-off-by: Christian Lamparter <chunkeey@web.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

11 years agop54: two endian fixes
Christian Lamparter [Fri, 3 Jul 2009 19:01:15 +0000]
p54: two endian fixes

This patch fixes all CHECK_ENDIAN complains:

1. p54/fwio.c:296:6: warning: restricted __le32 degrades to integer
    p54/fwio.c:296:6: warning: restricted __le32 degrades to integer

2. p54/p54spi.c:172:32: warning: incorrect type in initializer
   p54spi.c:172:32:    expected restricted __le32 [usertype] buffer
   p54/p54spi.c:172:32:    got unsigned int

Signed-off-by: Christian Lamparter <chunkeey@web.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

11 years agocfg80211: check for current_bss from giwrate
Samuel Ortiz [Fri, 3 Jul 2009 00:00:48 +0000]
cfg80211: check for current_bss from giwrate

When connecting to an ESSID manually, we may not set the BSSID, and thus
wdev->wext.connect.bssid will be NULL.
wdev->current_bss is always updated when a connection is established so we
should check it first.

Signed-off-by: Samuel Ortiz <samuel.ortiz@intel.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

11 years agort2x00: use wiphy rfkill interface
Ivo van Doorn [Wed, 1 Jul 2009 13:17:35 +0000]
rt2x00: use wiphy rfkill interface

Remove the input_polldev from rt2x00 and replace it with
the rfkill interface offered by the wiphy structure. This
simplifies the entire rfkill handling in rt2x00 and allows
us to remove the CONFIG_RT2X00_LIB_RFKILL option and always
enables rfkill capabilities.

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>