datapath: Refactor get_dp() function into multiple access APIs.

Avoid recursive read_rcu_lock() by using the lighter weight get_dp_rcu()
API. Add proper locking assertions to get_dp().

Signed-off-by: Andy Zhou <azhou@nicira.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
Use xstrdup() instead of strdup(), xmalloc() instead of malloc().

Signed-off-by: Ben Pfaff <blp@nicira.com>
Acked-by: Justin Pettit <jpettit@nicira.com>
debian: Avoid -Wformat-zero-length warnings.

Debian puts an extra "-Wformat" in the CFLAGS following OVS's own
"-Wformat -Wno-format-zero-length", which therefore overrides
-Wno-format-zero-length, so this commit adds an extra
-Wno-format-zero-length to avoid those false positives.

Signed-off-by: Ben Pfaff <blp@nicira.com>
Acked-by: Justin Pettit <jpettit@nicira.com>
ovs-ctl: Add comment to explain why we only save ofports for pre-1.10.

We've had a couple of questions about this lately, including one suggestion
that we should always save the OpenFlow port numbers.  This explains why
the behavior is as it is.

Signed-off-by: Ben Pfaff <blp@nicira.com>
Acked-by: Justin Pettit <jpettit@nicira.com>
ovsdb-server: Document RFC 7047 extensions to ovsdb <error>s.

Reported-by: Madhu Venugopal <vmadhu@redhat.com>
Signed-off-by: Ben Pfaff <blp@nicira.com>
Acked-by: Justin Pettit <jpettit@nicira.com>
configure: Don't check for malloc hooks that we no longer use.

Commit 825da1c6d1c7 (leak-checker: Remove because it cannot be made
thread-safe.) removed the only uses of these hooks but neglected to remove
the test for them.

Signed-off-by: Ben Pfaff <blp@nicira.com>
Acked-by: Justin Pettit <jpettit@nicira.com>
netlink-notifier: Exit loop if nl_sock_recv() returns an error

An error from nl_sock_recv() could mean that there are some issues with the
netlink socket (EBADF, ENOTSOCK, ...). Calling nl_sock_recv() in this case is
harmful: nln_run() will never return and since we are calling it from the main
thread, vswitchd becomes unresponsive.
Also, with this commit we avoid calling the notifier callback in case of error
(except for ENOBUFS, which means that there could be too many notifications)

Suggested-by: Alex Wang <alexw@nicira.com>
Signed-off-by: Daniele Di Proietto <ddiproietto@vmware.com>
Acked-by: Ben Pfaff <blp@nicira.com>
Acked-by: Alex Wang <alexw@nicira.com>
stp: Add more logging points for debug.

This commit adds more logging points in stp module for debugging.
Also, it makes the log print out the port name.

Signed-off-by: Alex Wang <alexw@nicira.com>
Acked-by: Ben Pfaff <blp@nicira.com>
netdev-dpdk: Increase tx queue size and rx batch size

These values has been found to give the best throughput
in simple cases (1 flow 64 bytes UDP packets).

Signed-off-by: Daniele Di Proietto <ddiproietto@vmware.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
dpif-netdev: Reduce netdev_flow_key size

struct 'miniflow' already contains MINI_N_INLINE values, therefore
we can save few bytes in netdev_flow_key.

Signed-off-by: Daniele Di Proietto <ddiproietto@vmware.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
dpif-netdev: Initialize upcall->packet when queuing to userspace.

Commit db73f7166a6 (netdev-dpdk: Fix race condition with DPDK mempools in
non pmd threads) switched to a new way of setting up 'upcall->packet', but
only initialized two of the fields in the packet.  This could cause
core dumps and other strange behavior.  In particular it caused failures in
several unit tests on XenServer.

This commit fixes the problem by initializing the entire ofpbuf.

Signed-off-by: Ben Pfaff <blp@nicira.com>
Acked-by: Justin Pettit <jpettit@nicira.com>
userspace: add support for pop_eth and push_eth actions

These actions will allow L2->L3 and L3->L2 switching, and are supposed
to be added to flows installed in the datapath transparently by
ovs-vswitchd.

Signed-off-by: Lorand Jakab <lojakab@cisco.com>
userspace: add layer 3 flow and switching support

This commit relaxes the assumption that all packets have an Ethernet
header, and adds support for layer 3 flows.  For each packet received on
the Linux kernel datapath the l2 and l3 members of struct ofpbuf are
intialized appropriately, and some functions now expect this (notably
flow_extract()), in order to differentiate between layer 2 and layer 3
packets.  struct flow has now a new 'base_layer' member, because we
cannot assume that a flow has no Ethernet header when eth_src and
eth_dst are 0.  For layer 3 packets, the protocol type is still stored
in the eth_type member.

Switching L2->L3 and L3->L2 are both implemented by adding the pop_eth
and push_eth actions respectively when a transition is detected.  The
push_eth action puts 0s on both source and destination MACs.  These
addresses can be modified with mod_dl_dst and mod_dl_src actions.

Added new prerequisite MFP_ETHERNET for fields MFF_ETH_SRC, MFF_ETH_DST,
MFF_VLAN_TCI, MFF_DL_VLAN, MFF_VLAN_VID and MFF_DL_VLAN_PCP.

Signed-off-by: Lorand Jakab <lojakab@cisco.com>
datapath: add layer 3 flow/port support

Implementation of the pop_eth and push_eth actions in the kernel, and
layer 3 flow support.

Signed-off-by: Lorand Jakab <lojakab@cisco.com>