ovs-bugtool: Limit disk usage

When output to a file with "--unlimited" unset,
only allow 90% of the free disk space to be used.

Signed-off-by: Ben Pfaff <blp@nicira.com>
FAQ: Explain why allowing only IP traffic breaks IP connectivity.

Signed-off-by: Ben Pfaff <blp@nicira.com>
Acked-by: pritesh <pritesh.kothari@cisco.com>
ofproto: Recycle least recently used ofport.

If there is a lot of churn in creation and deletion of
interfaces, we may end up recycling the ofport value of a
recently deleted interface for a newly created interface.
This may result in an old stale openflow rule applying
on the newly created interface.

With this commit, when a new port is added, try and provide
it an ofport value that has not been used during the current
run. If such value does not exist, provide the least
recently used ofport value.

Signed-off-by: Gurucharan Shetty <gshetty@nicira.com>
Acked-by: Ben Pfaff <blp@nicira.com>
nicira-ext: Fix incorrect description of NXM_NX_IPV6_LABEL as non-maskable.

Commit 32455024044444 (OXM: Allow masking of IPv6 Flow Label) made the
IPv6 flow label field fully maskable but did not update the comment to say
so.

EXT-101.
CC: Jean Tourrilhes <jt@hpl.hp.com>
Signed-off-by: Ben Pfaff <blp@nicira.com>
Acked-by: Justin Pettit <jpettit@nicira.com>