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When userspace and the kernel were using the same structure for flows,
flow_t was a useful way to indicate that a structure was really a userspace
flow instead of a kernel one, but now it's better to just write "struct
flow" for consistency, since OVS doesn't use typedefs for structs
elsewhere.
Acked-by: Jesse Gross <jesse@nicira.com>
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The "struct odp_flow_key" used in the kernel datapath is conceptually
separate from the "flow_t" used in userspace, but until now we have
used the latter as a typedef for the former for convenience. This commit
separates them. This makes it possible in upcoming commits to change
them independently.
This is cross-ported from the "wdp" branch, which has had it for months.
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This special case of iterating through flows is easier and presumably
faster to implement using a macro.
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These macros require one fewer argument by switching, which makes code
that uses them shorter and more readable.
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Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Jesse Gross <jesse@nicira.com>
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Add a tun_id field which contains the ID of the encapsulating tunnel
on which a packet was received (0 if not received on a tunnel). Also
add an action which allows the tunnel ID to be set for outgoing
packets. At this point there aren't any tunnel implementations so
these fields don't have any effect.
The matching is exposed to OpenFlow by overloading the high 32 bits
of the cookie as the tunnel ID. ovs-ofctl is capable of turning
on this special behavior using a new "tun-cookie" command but this
command is intentially undocumented to avoid it being used without
a full understanding of the consequences.
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When adding a new classifier rule we check if there is a rule
of the same priority first and overwrite it before inserting a
new rule. Previously we would stop looking if we found one rule
in the correct bucket with the same priority, even if it didn't
match. This keeps going until we either find a matching rule or
we run out of equal priority rules.
Reported-by: Tetsuo NAKAGAWA <nakagawa@mxc.nes.nec.co.jp>
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This may be useful for debugging.
From Jean Tourrilhes <jt@hpl.hp.com>.
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OpenFlow 1.0 adds support for matching on IP ToS/DSCP bits.
NOTE: OVS at this point is not wire-compatible with OpenFlow 1.0 until
the final commit in this OpenFlow 1.0 set.
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This commit adds (some) support for a couple new OpenFlow 0.9 features:
- The OFPFF_CHECK_OVERLAP flag in Flow Mod messages allows the
controller to prevent flows that would conflict at the same
priority.
- An emergency flow cache that contains a small flow table that is
used if the switch loses connectivity with the controller. I
believe the design has fundamental flaws and looks likely to be
retired. If a controller attempts to add a flow to the emergency
flow cache, OVS always responds that the tables are full.
The OpenFlow 0.9 error codes are also sync'd in the commit.
NOTE: OVS at this point is not wire-compatible with OpenFlow 0.9 until the
final commit in this OpenFlow 0.9 set.
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Starting in OpenFlow 0.9, it is possible to match on the VLAN PCP
(priority) field and rewrite the IP ToS/DSCP bits. This check-in
provides that support and bumps the wire protocol number to 0x98.
NOTE: The wire changes come together over the set of OpenFlow 0.9 commits,
so OVS will not be OpenFlow-compatible with any official release between
this commit and the one that completes the set.
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This prepares for adding a new function that deals with a "struct hmap"
moving, as opposed to a "struct hmap_node".
Since there was only a single call to this in the whole tree, and its
caller didn't have any callers of its own at all, also move this function
from hmap.h to hmap.c.
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