Until now, the optional OVS_USERSPACE_ATTR_USERDATA attribute had to be
exactly 64 bits long, if it was present.  However, 64 bits is not enough
space to associate as much information with a flow as would be convenient
for some userspace features now under development.  This commit generalizes
the attribute, allowing it to be any length.

This generalization is backward-compatible: if userspace only uses 64-bit
attributes, then it will not see any change in behavior.

CC: Romain Lenglet <rlenglet@vmware.com>
Signed-off-by: NBen Pfaff <blp@nicira.com>
Signed-off-by: NJesse Gross <jesse@nicira.com>

This reduces the number of valid "no such device" error values that
need special attention by the caller.

Userspace code will need to keep on checking for both ENODEV and
ENOENT as long as older kernel modules are around.
Signed-off-by: NJarno Rajahalme <jarno.rajahalme@nsn.com>
Signed-off-by: NJesse Gross <jesse@nicira.com>

Having the 16bit port_no in between a set of pointers creates
an unwanted and useless hole in the struct.
Signed-off-by: NThomas Graf <tgraf@suug.ch>
Signed-off-by: NJesse Gross <jesse@nicira.com>

bonus: if we ever are to use IFF_LIVE_ADDR_CHANGE for
anything further than to check availability in eth_mac_addr(),
Open vSwitch will be ready for that.
Signed-off-by: NThomas Graf <tgraf@redhat.com>
Signed-off-by: NJesse Gross <jesse@nicira.com>

Currently, each time a device is detached from an OVS datapath
we call synchronize RCU before freeing associated data structures.
However, if a bridge is deleted (which detaches all ports) when
many devices are connected then there can be a long delay.  This
switches to use call_rcu() to group the cost together.
Reported-by: NJustin Pettit <jpettit@nicira.com>
Signed-off-by: NJesse Gross <jesse@nicira.com>

This patch adds support for skb mark matching and set action.
Signed-off-by: NAnsis Atteka <aatteka@nicira.com>
Signed-off-by: NJesse Gross <jesse@nicira.com>

just use more faster this_cpu_ptr instead of per_cpu_ptr(p, smp_processor_id());
Signed-off-by: NShan Wei <davidshan@tencent.com>
Reviewed-by: NChristoph Lameter <cl@linux.com>
Signed-off-by: NJesse Gross <jesse@nicira.com>

This patch adds ipv6 set action functionality. It allows to change
traffic class, flow label, hop-limit, ipv6 source and destination
address fields.
Signed-off-by: NAnsis Atteka <aatteka@nicira.com>
Signed-off-by: NJesse Gross <jesse@nicira.com>

With this commit, OVS will match the data in the RARP packets having
ethertype 0x8035, in the same way as the data in the ARP packets.
Signed-off-by: NMehak Mahajan <mmahajan@nicira.com>
Signed-off-by: NJesse Gross <jesse@nicira.com>

We currently only extract the ARP payload if the opcode indicates
that it is a request or reply.  However, we also only set the
key length in these situations even though it should still be
possible to match on the opcode.  There's no real reason to
restrict the ARP opcode since all have the same format so this
simply removes the check.
Signed-off-by: NMehak Mahajan <mmahajan@nicira.com>
Signed-off-by: NJesse Gross <jesse@nicira.com>

If an attempt is made to transmit a packet that is over the device's
MTU then we log it using the datapath's name.  However, it is much
more helpful to use the device name instead.
Signed-off-by: NJesse Gross <jesse@nicira.com>

Found by http://coccinelle.lip6.fr/Signed-off-by: NPeter Senna Tschudin <peter.senna@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

It is a frequent mistake to confuse the netlink port identifier with a
process identifier.  Try to reduce this confusion by renaming fields
that hold port identifiers portid instead of pid.

I have carefully avoided changing the structures exported to
userspace to avoid changing the userspace API.

I have successfully built an allyesconfig kernel with this change.
Signed-off-by: N"Eric W. Biederman" <ebiederm@xmission.com>
Acked-by: NStephen Hemminger <shemminger@vyatta.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Use hash table to store ports of datapath. Allow 64K ports per switch.
Signed-off-by: NPravin B Shelar <pshelar@nicira.com>
Signed-off-by: NJesse Gross <jesse@nicira.com>

The vlan encapsulation fields in the maximum flow defintion were
never updated when the representation changed before upstreaming.
In theory this could cause a kernel panic when a maximum length
flow is used.  In practice this has never happened (to my knowledge)
because skb allocations are padded out to a cache line so you would
need the right combination of flow and packet being sent to userspace.
Signed-off-by: NJesse Gross <jesse@nicira.com>

Signed-off-by: NJoe Stringer <joe@wand.net.nz>
Signed-off-by: NJesse Gross <jesse@nicira.com>

The callback function of call_rcu() just calls a kfree(), so we
can use kfree_rcu() instead of call_rcu() + callback function.

spatch with a semantic match is used to found this problem.
(http://coccinelle.lip6.fr/)
Signed-off-by: NWei Yongjun <yongjun_wei@trendmicro.com.cn>
Acked-by: NJesse Gross <jesse@nicira.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Following patch adds support for network namespace to openvswitch.
Since it must release devices when namespaces are destroyed, a
side effect of this patch is that the module no longer keeps a
refcount but instead cleans up any state when it is unloaded.
Signed-off-by: NPravin B Shelar <pshelar@nicira.com>
Signed-off-by: NJesse Gross <jesse@nicira.com>

When installing a flow with an action to set a particular field we
need to validate that the packets that are part of the flow actually
contain that header.  With IP we use zeroed addresses and with TCP/UDP
the check is for zeroed ports.  This check is overly broad and can catch
packets like DHCP requests that have a zero source address in a
legitimate header.  This changes the check to look for a zeroed protocol
number for IP or for both ports be zero for TCP/UDP before considering
the header to not exist.
Reported-by: NEthan Jackson <ethan@nicira.com>
Signed-off-by: NJesse Gross <jesse@nicira.com>

This reverts commit 5b3e7e6c.

The problem that the original commit was attempting to fix can
never happen in practice because validation is done one a per-flow
basis rather than a per-packet basis.  Adding additional checks at
runtime is unnecessary and inconsistent with the rest of the code.

CC: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NJesse Gross <jesse@nicira.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

If there is no OVS_SAMPLE_ATTR_ACTIONS set then "acts_list" is NULL and
it leads to a NULL dereference when we call nla_len(acts_list).  This
is a static checker fix, not something I have seen in testing.
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

At the point where it was used, skb_shinfo(skb)->gso_type referred to a
post-GSO sk_buff.  Thus, it would always be 0.  We want to know the pre-GSO
gso_type, so we need to obtain it before segmenting.

Before this change, the kernel would pass inconsistent data to userspace:
packets for UDP fragments with nonzero offset would be passed along with
flow keys that indicate a zero offset (that is, the flow key for "later"
fragments claimed to be "first" fragments).  This inconsistency tended
to confuse Open vSwitch userspace, causing it to log messages about
"failed to flow_del" the flows with "later" fragments.
Signed-off-by: NBen Pfaff <blp@nicira.com>
Signed-off-by: NJesse Gross <jesse@nicira.com>

Fix return check typo.
Signed-off-by: NPravin B Shelar <pshelar@nicira.com>
Signed-off-by: NJesse Gross <jesse@nicira.com>

It's possible that packets that are sent on internal devices (from
the OVS perspective) have already traversed the local IP stack.
After they go through the internal device, they will again travel
through the IP stack which may get confused by the presence of
existing information in the skb. The problem can be observed
when switching between namespaces. This clears out that information
to avoid problems but deliberately leaves other metadata alone.
This is to provide maximum flexibility in chaining together OVS
and other Linux components.
Signed-off-by: NJesse Gross <jesse@nicira.com>

Standardize the net core ratelimited logging functions.

Coalesce formats, align arguments.
Change a printk then vprintk sequence to use printf extension %pV.
Signed-off-by: NJoe Perches <joe@perches.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

"skb" is non-NULL here, for example we dereference it in skb_clone().
The intent was to test "nskb" which was just set.
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Acked-by: NJesse Gross <jesse@nicira.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

When the kernel validates set TCP/UDP port actions, it looks at
the ports in the existing flow to make sure that the L4 header exists.
However, these actions always use the IPv4 version of the struct.
Following patch fixes this by checking for flow ip protocol first.
Signed-off-by: NPravin B Shelar <pshelar@nicira.com>
Signed-off-by: NJesse Gross <jesse@nicira.com>

Replaced all instances of Nicira Networks(, Inc) to Nicira, Inc.
Signed-off-by: NRaju Subramanian <rsubramanian@nicira.com>
Signed-off-by: NBen Pfaff <blp@nicira.com>
Signed-off-by: NJesse Gross <jesse@nicira.com>

This patch fixes a possible lock-up bug where rtnl_lock might not
get released.
Signed-off-by: NAnsis Atteka <aatteka@nicira.com>
Signed-off-by: NJesse Gross <jesse@nicira.com>

Use of "unsigned int" is preferred to bare "unsigned" in net tree.
Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

There is no need to send a notification if ovs_vport_set_options() failed
and ovs_vport_cmd_set() did not change anything.
Signed-off-by: NAnsis Atteka <aatteka@nicira.com>
Signed-off-by: NJesse Gross <jesse@nicira.com>

We currently check that a packet is IPv4 and TCP before fetching the
TCP flags.  This enables fetching from IPv6 packets as well.
Reported-by: NMichael Mao <mmao@nicira.com>
Signed-off-by: NJesse Gross <jesse@nicira.com>

When collecting TCP flags we check that the IP header indicates that
a TCP header is present but not that the packet is actually long
enough to contain the header.  This adds a check to prevent reading
off the end of the packet.

In practice, this is only likely to result in reading of bad data and
not a crash due to the presence of struct skb_shared_info at the end
of the packet.
Signed-off-by: NJesse Gross <jesse@nicira.com>

These macros contain a hidden goto, and are thus extremely error
prone and make code hard to audit.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Remove all #inclusions of asm/system.h preparatory to splitting and killing
it.  Performed with the following command:

perl -p -i -e 's!^#\s*include\s*<asm/system[.]h>.*\n!!' `grep -Irl '^#\s*include\s*<asm/system[.]h>' *`
Signed-off-by: NDavid Howells <dhowells@redhat.com>

When modifying IP addresses or ports on a UDP packet we don't
correctly follow the rules for unchecksummed packets.  This meant
that packets without a checksum can be given a incorrect new checksum
and packets with a checksum can become marked as being unchecksummed.
This fixes it to handle those requirements.
Signed-off-by: NJesse Gross <jesse@nicira.com>

When OVS_VPORT_ATTR_NAME is specified and dp_ifindex is nonzero, the
logical behavior would be for the vport name lookup scope to be limited
to the specified datapath, but in fact the dp_ifindex value was ignored.
This commit causes the search scope to be honored.
Signed-off-by: NBen Pfaff <blp@nicira.com>
Signed-off-by: NJesse Gross <jesse@nicira.com>

Use eth_hw_addr_random() instead of calling random_ether_addr()
to set addr_assign_type correctly to NET_ADDR_RANDOM.

Reset the state to NET_ADDR_PERM as soon as the MAC get
changed via .ndo_set_mac_address.

v2: adapt to renamed eth_hw_addr_random()
Signed-off-by: NDanny Kukawka <danny.kukawka@bisect.de>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The logic to split up the list of datapaths into multiple Netlink messages
was simply wrong, causing the list to be terminated after the first part.
Only about the first 50 datapaths would be dumped.  This fixes the
problem.
Reported-by: NPaul Ingram <paul@nicira.com>
Signed-off-by: NBen Pfaff <blp@nicira.com>
Signed-off-by: NJesse Gross <jesse@nicira.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

For net part, remove duplicate included header.
Signed-off-by: NShan Wei <davidshan@tencent.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>