This commit introduces a new data structure used for receiving packets from
netdevs and passing them to dpifs.
The purpose of this change is to allow storing some private data for each
packet. The subsequent commits make use of it.
Signed-off-by: Daniele Di Proietto <ddiproietto@vmware.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
This fixes the following warning in the DPDK code.
../lib/netdev-dpdk.c:790:31: error: passing 'const struct netdev *' to
parameter of type 'struct netdev *' discards qualifiers
Signed-off-by: Ethan Jackson <ethan@nicira.com>
Acked-by: Ben Pfaff <blp@nicira.com>
Commit 3e912ffcbb (netdev: Add 'change_seq' back to netdev.) added per-
netdev change number for indicating status change. Future commits used
this change number to optimize the netdev status update to database.
However, the work also introduced the bug in the following scenario:
- assume interface eth0 has address 1.2.3.4, eth1 has adddress 10.0.0.1.
- assume tunnel port p1 is set with remote_ip=10.0.0.5.
- after setup, 'ovs-vsctl list interface p1 status' should show the
'tunnel_egress_iface="eth1"'.
- now if the address of eth1 is change to 0 via 'ifconfig eth1 0'.
- expectedly, after change, 'ovs-vsctl list interface p1 status' should
show the 'tunnel_egress_iface="eth0"'
However, 'tunnel_egress_iface' will not be updated on current master.
This is in that, the 'netdev-vport' module corresponding to p1 does
not react to routing related changes.
To fix the bug, this commit adds a change sequence number in the route-
table module and makes netdev-vport check the sequence number for
tunnel status update.
Bug #1240626
Signed-off-by: Alex Wang <alexw@nicira.com>
Acked-by: Ben Pfaff <blp@nicira.com>
This commit can be seen as a partial revert of commit
da4a619179d (netdev: Globally track port status changes)
by adding the 'change_seq' to 'struct netdev'.
Signed-off-by: Alex Wang <alexw@nicira.com>
Acked-by: Ben Pfaff <blp@nicira.com>
new netdev type like DPDK can support multi-queue IO. Following
patch Adds support for same.
Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Acked-by: Thomas Graf <tgraf@redhat.com>
Preparation for multi queue netdev IO. There are no functional changes
in this patch.
Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Acked-by: Thomas Graf <tgraf@redhat.com>
DPDK netdev need to access ofpbuf while sending buffer. Following
patch changes netdev_send accordingly.
Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Acked-by: Thomas Graf <tgraf@redhat.com>
DPDK can receive multiple packets but current netdev API does
not allow that. Following patch allows dpif-netdev receive batch
of packet in a rx_recv() call for any netdev port. This will be
used by dpdk-netdev.
Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
If VLAN acceleration is used when the kernel receives a packet
then the outer-most VLAN tag will not be present in the packet
when it is received by netdev-linux. Rather, it will be present
in auxdata.
This patch uses recvmsg() instead of recv() to read auxdata for
each packet and if the vlan_tid is set then it is added to the packet.
Adding the vlan_tid makes use of headroom available
in the buffer parameter of rx_recv.
Signed-off-by: Simon Horman <horms@verge.net.au>
Co-authored-by: Ben Pfaff <blp@nicira.com>
Signed-off-by: Ben Pfaff <blp@nicira.com>
Update the netdev_class so that struct ofpbuf * is passed to rx_recv()
to provide both the data and size of the data to read a packet into.
On success, update struct ofpbuf size inside netdev_class rx_recv
implementation and return 0. This moves logic from the caller.
On error a positive error code is returned, whereas previously
a negative error code was returned. This is a more common convention.
This patch should not have any behavioural changes.
This patch is in preparation for the netdev-linux variant of rx_recv()
making use of headroom in the struct ofpbuf * parameter to push a VLAN tag
obtained from auxdata.
Signed-off-by: Simon Horman <horms@verge.net.au>
Co-authored-by: Ben Pfaff <blp@nicira.com>
Signed-off-by: Ben Pfaff <blp@nicira.com>
Replace truncated description of when rx_recv() may be NULL
with text used for other fields of netdev_class.
Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Ben Pfaff <blp@nicira.com>
Previously, we tracked status changes for ofports on a per-device basis.
Each time in the main thread's loop, we would inspect every ofport
to determine whether the status had changed for corresponding devices.
This patch replaces the per-netdev change_seq with a global 'struct seq'
which tracks status change for all ports. In the average case where
ports are not constantly going up or down, this allows us to check the
sequence once per main loop and not poll any ports. In the worst case,
execution is expected to be similar to how it is currently.
In a test environment of 5000 internal ports and 50 tunnel ports with
bfd, this reduces average CPU usage of the main thread from about 40% to
about 35%.
Signed-off-by: Joe Stringer <joestringer@nicira.com>
Signed-off-by: Ethan Jackson <ethan@nicira.com>
Acked-by: Ethan Jackson <ethan@nicira.com>
We have a call chain like this:
iface_configure_qos() calls
netdev_dump_queues(), which calls
netdev_linux_dump_queues(), which calls back through 'cb' to
qos_unixctl_show_cb(), which calls
netdev_delete_queue(), which calls
netdev_linux_delete_queue().
Both netdev_dump_queues() and netdev_linux_delete_queue() take the same
mutex in the same netdev, which deadlocks.
This commit fixes the problem by getting rid of the callback.
netdev_linux_dump_queue_stats() would benefit from the same treatment but
it's less urgent because I don't see any callbacks from that function that
call back into a netdev function.
Bug #19319.
Reported-by: Scott Hendricks <shendricks@vmware.com>
Signed-off-by: Ben Pfaff <blp@nicira.com>
This is the same lifecycle used in the ofproto provider interface.
Compared to the previous netdev provider interface, it has the
advantage that the netdev top layer can control when any given
netdev becomes visible to the outside world.
Signed-off-by: Ben Pfaff <blp@nicira.com>
Flagged with: https://github.com/lyda/misspell-check
Run with: git ls-files | misspellings -f -
Signed-off-by: Andy Hill <hillad@gmail.com>
Signed-off-by: Ben Pfaff <blp@nicira.com>
The distinction between struct netdev_dev and struct netdev has always
been confusing. Now that previous commits have eliminated all interesting
state from struct netdev, this commit deletes it and renames struct
netdev_dev to take its place. Now the situation makes much more sense and
I won't have to continue making embarrassed explanations in the future.
Good riddance.
Signed-off-by: Ben Pfaff <blp@nicira.com>
Separating packet capture from "struct netdev" means that there is no
remaining per-"struct netdev" state, which will allow us to get rid of
"struct netdev_dev" (by renaming it "struct netdev").
Signed-off-by: Ben Pfaff <blp@nicira.com>
Acked-by: Ethan Jackson <ethan@nicira.com>
This gets rid of the only per-instance data in "struct netdev", which
will make it possible to merge "struct netdev_dev" into "struct netdev" in
a later commit.
Ed Maste wrote the netdev-bsd changes in this commit.
Signed-off-by: Ben Pfaff <blp@nicira.com>
Co-authored-by: Ed Maste <emaste@freebsd.org>
Signed-off-by: Ed Maste <emaste@freebsd.org>
Tested-by: Ed Maste <emaste@freebsd.org>
This patch removes the final bit of linux specific code which
prevents building netdev-vport everywhere. With this, other
platforms automatically get access to patch ports, and (if their
datapath supports it), flow based tunneling.
Signed-off-by: Ethan Jackson <ethan@nicira.com>
This commit moves responsibility for implementing patch ports from
the datapath to ofproto-dpif. There are two main reasons to do
this.
The first is a matter of design: ofproto-dpif both has more
information than the datapath, and is better suited to handle the
complexity required to implement patch ports.
The second is performance. My setup is a virtual machine with two
basic learning bridges connected by patch ports. I used
ovs-benchmark to ping the virtual router IP residing outside the
VM. Over a 60 second run, "ovs-benchmark rate" improves from
14618.1 to 19311.9 transactions per second, or a 32% improvement.
Similarly, "ovs-benchmark latency" improves from 6ms to 4ms.
Signed-off-by: Ethan Jackson <ethan@nicira.com>
This is a straight search-and-replace, except that I also removed #include
<assert.h> from each file where there were no assert calls left.
Signed-off-by: Ben Pfaff <blp@nicira.com>
Acked-by: Ethan Jackson <ethan@nicira.com>
Future patches will need to know the details of a netdev's tunnel
configuration from outside the netdev library.
Signed-off-by: Ethan Jackson <ethan@nicira.com>
This patch adds new netdev classes that implement
"system" and "tap" devices on FreeBSD using the
libpcap library. This enables the use of the
"netdev" datapath_type of Open vSwitch on FreeBSD.
Signed-off-by: Gaetano Catalli <gaetano.catalli@gmail.com>
Signed-off-by: Ed Maste <emaste@adaranet.com>
Signed-off-by: Giuseppe Lettieri <g.lettieri@iet.unipi.it>
Signed-off-by: Ben Pfaff <blp@nicira.com>
A smap is a string to string hash map. It has a cleaner interface
than shash's which were traditionally used for the same purpose.
This patch implements the data structure, and changes netdev and
its providers to use it.
Signed-off-by: Ethan Jackson <ethan@nicira.com>
Replaced all instances of Nicira Networks(, Inc) to Nicira, Inc.
Feature #10593
Signed-off-by: Raju Subramanian <rsubramanian@nicira.com>
Signed-off-by: Ben Pfaff <blp@nicira.com>
iface_configure_qos() passes a callback to netdev_dump_queues() that can
delete queues. The netdev-linux implementation of this function was
unprepared for the callback to delete queues, so this could cause a
use-after-free. This fixes the problem in netdev_linux_dump_queues() and
documents that netdev_dump_queues() implementations must support deletions
in the callback.
Found by valgrind:
==1593== Invalid read of size 8
==1593== at 0x4A8C43: netdev_linux_dump_queues (hmap.h:326)
==1593== by 0x4305F7: bridge_reconfigure (bridge.c:3084)
==1593== by 0x431384: bridge_run (bridge.c:1892)
==1593== by 0x432749: main (ovs-vswitchd.c:96)
==1593== Address 0x632e078 is 8 bytes inside a block of size 32 free'd
==1593== at 0x4C240FD: free (vg_replace_malloc.c:366)
==1593== by 0x4A4D74: hfsc_class_delete (netdev-linux.c:3250)
==1593== by 0x42AA59: iface_delete_queues (bridge.c:3055)
==1593== by 0x4A8C8C: netdev_linux_dump_queues (netdev-linux.c:1881)
==1593== by 0x4305F7: bridge_reconfigure (bridge.c:3084)
==1593== by 0x431384: bridge_run (bridge.c:1892)
Bug #10164.
Reported-by: Ram Jothikumar <ram@nicira.com>
Signed-off-by: Ben Pfaff <blp@nicira.com>
netdev_get_features() and other functions have always used OpenFlow 1.0
"enum ofp_port_features" bits as part of their interface. This commit
switches over to using an internally defined interface that is not tied
directly to any OpenFlow version, making evolution of each side of the
interface easier in the future.
Reviewed-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Ben Pfaff <blp@nicira.com>
netdev_find_dev_by_in4() appears to no longer be used and thus
can be removed. This also allows netdev_enumerate(), the
enumerate member of struct netdev_class and netdev_linux_enumerate()
to be removed.
I noticed this as netdev_linux_enumerate() makes use of if_nameindex()
and if_freenameindex() which are not available when compiling using
the Android NDK r6b (Android API level 13).
Most netdev provider functions are allowed to be null if the implementation
does not support this feature. This commit adds this feature for get_mtu
and set_mtu, and changes netdev-vport to take advantage of it.
Also, changes netdev_get_mtu() to report an MTU of 0 on error, instead of
leaving the MTU indeterminate.
There is no need to have vport attribute MTU (OVS_VPORT_ATTR_MTU) as
linux net-dev-ioctl can be used to get/set MTU for linux device.
Following patch removes OVS_VPORT_ATTR_MTU from datapath protocol.
This patch also adds netdev_set_mtu interface. So that MTU adjustments
can be done from OVS userspace. get_mtu() interface is also changed, now
get_mtu() returns EOPNOTSUPP rather than returning 0 and setting *pmtu
to INT_MAX in case there is no MTU attribute for given device.
Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Acked-by: Jesse Gross <jesse@nicira.com>
Until now, each call to netdev_open() for a particular network device
had to either specify a set of network device arguments that was either
empty or (for devices that already existed) equal to the existing device's
configuration. Unfortunately, the definition of "equality" in the latter
case was mostly done in terms of strict equality of string-to-string maps,
which caused problems in cases where, for example, one set of arguments
specified the default value of an optional argument explicitly and the
other omitted it.
The netdev interface does have provisions for defining equality other ways,
but this had only been done in one case that was especially problematic in
practice. One way to solve this particular problem would be to carefully
define equality in all the problematic cases.
This commit takes another approach based on the realization that there is
really no need to do any comparisons. Instead, it removes configuration
at netdev_open() time entirely, because almost all of netdev_open()'s
callers are not interested in creating and configuring a netdev. Most of
them just want to open a configured device and use it. Therefore, this
commit stops providing any configuration arguments to netdev_open() and the
provider functions that it calls. Instead, a caller that does want to
configure a device does so after it opens it, by calling
netdev_set_config().
This change allows us to simplify the netdev interface a bit. There is no
longer any need to implement argument comparisons. As a result, there is
also no need for "struct netdev_dev" to keep track of configuration at all.
Instead, the network devices that have configuration keep track of it in
their own internal form.
This new interface does mean that it becomes possible to accidentally
create and try to use an unconfigured netdev that requires configuration.
Bug #6677.
Reported-by: Paul Ingram <paul@nicira.com>
The Open vSwitch tree only has one user of the ability for a netdev to
receive packets from a network device. Thus, this commit simplifies the
common-case use of the netdev interface by replacing the "ethertype" option
from "struct netdev_options" by a new netdev_listen() call.
The only user of netdev_listen() wants to receive all packets from a
network device, so this commit also removes the ability to restrict the
received packets to a particular protocol. (This ability was once used by
the Open vSwitch integrated DHCP client, but that code has been removed.)
This commit also simplifies and improves the implementation of the code
in netdev-linux that started listening to a network device. Before, I had
not figured out how to avoid receiving all packets on all devices before
binding to a particular device, but I took a closer look at the kernel code
and figured it out.
I've tested that the userspace datapath (dpif-netdev), the only user of
netdev_recv(), still works after this change.
When doing a netdev_open(), a check is first done to make sure the
arguments are equivalent for any open devices with the same name. In
most cases, a simple shash comparison is sufficient. However, IPsec
key configuration is handled by an external program, so it is not pushed
down into the kernel module. Thus, when the "unparse_config" method is
called on an existing IPsec-based vport, a simple comparison with the
returned data will not match the original configuration. This commit
adds code to allow netdev-specific argument comparisons and has
"ipsec_gre" make use of them.
Bug #5575
This patch moves miimon logic from the bond module to netdev-linux.
This greatly simplifies the bonding code while adding minimal
complexity to netdev-linux. The bonding code is so high level, it
really has no business worrying about how precisely slave status is
determined.
I looked at almost every uint<N>_t in the tree to determine whether it was
really in network byte order, and converted the ones that were.
The only remaining ones, modulo my mistakes, are in openflow.h. I'm not
sure whether we should convert those, because there might be some value
in remaining close to upstream for this header.
I've never heard of anyone actually using controller discovery.
It adds a great deal of code to the source tree, and a little
bit of complication to ofproto, so this commit removes it.
Until now, tunnel vports have had a specific MTU, in the same way that
ordinary network devices have an MTU, but treating them this way does not
always make sense. For example, consider a datapath that has three ports:
the local port, a GRE tunnel to another host, and a physical port. If
the physical port is configured with a jumbo MTU, it should be possible to
send jumbo packets across the tunnel: the tunnel can do fragmentation or
the physical port traversed by the tunnel might have a jumbo MTU.
However, until now, tunnels always had a 1500-byte MTU by default. It
could be adjusted using ODP_VPORT_MTU_SET, but nothing actually did this.
One alternative would be to make ovs-vswitchd able to set the vport's MTU.
This commit, however, takes a different approach, of dropping the concept
of MTU entirely for tunnel vports. This also solves the problem described
above, without making any additional work for anyone.
I tested that, without this change, I could not send 1600-byte "pings"
between two machines whose NICs had 2000-byte MTUs that were connected to
vswitches that were in turn connected over GRE tunnels with the default
1500-byte MTU. With this change, it worked OK, regardless of the MTU of
the network traversed by the GRE tunnel.
This patch also makes "patch" ports MTU-less.
It might make sense to remove vport_set_mtu() and the associated callback
now, since ordinary network devices are the only vports that support it
now.
Signed-off-by: Ben Pfaff <blp@nicira.com>
Suggested-by: Jesse Gross <jesse@nicira.com>
Acked-by: Jesse Gross <jesse@nicira.com>
Bug #3728.
