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fib: Table Replace

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Type: feature

from the API doc, a table replace is:

"
    The use-case is that, for some unspecified reason, the control plane
    has a very different set of entries it wants in the table than VPP
    currently has. The CP would thus like to 'replace' VPP's current table
    only by specifying what the new set of entries shall be, i.e. it is not
    going to delete anything that already eixts.
    the CP delcartes the start of this procedure with this begin_replace
    API Call, and when it has populated all the entries it wants, it calls
    the below end_replace API. From this point on it is of coursce free
    to add and delete entries as usual.
    The underlying mechanism by which VPP implements this replace is
    purposefully left unspecified.
"

In the FIB, the algorithm is implemented using mark and sweep.

Algorithm goes:
1) replace_begin: this marks all the entries in that table as 'stale'
2) download all the entries that should be in this table
 - this clears the stale flag on those entries
3) signal the table converged: ip_table_replace_end
 - this removes all entries that are still stale

this procedure can be used when an agent first connects to VPP,
as an alternative to dump and diff state reconciliation.

Change-Id: I168edec10cf7670866076b129ebfe6149ea8222e
Signed-off-by: Neale Ranns <nranns@cisco.com>
This commit is contained in:
Neale Ranns
2019-11-08 12:42:31 +00:00
committed by Ole Trøan
parent 0d3d4824a4
commit 9db6ada779
31 changed files with 1137 additions and 308 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
test/vpp_ip.py
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@ -67,14 +67,16 @@ class VppIpAddressUnion():
elif hasattr(other, "ip4") and hasattr(other, "ip6"):
# vl_api_address_union_t
if 4 == self.version:
return self.ip_addr.packed == other.ip4
return self.ip_addr == other.ip4
else:
return self.ip_addr.packed == other.ip6
return self.ip_addr == other.ip6
else:
_log.error("Comparing VppIpAddressUnions:%s"
" with incomparable type: %s",
self, other)
return NotImplemented
raise Exception("Comparing VppIpAddressUnions:%s"
" with incomparable type: %s",
self, other)
def __ne__(self, other):
return not (self == other)
def __str__(self):
return str(self.ip_addr)
@ -143,7 +145,6 @@ class VppIpMPrefix():
return (self.glen == other.grp_address_length and
self.gaddr == str(other.grp_address.ip6) and
self.saddr == str(other.src_address.ip6))
else:
raise Exception("Comparing VppIpPrefix:%s with unknown type: %s" %
raise Exception("Comparing VppIpMPrefix:%s with unknown type: %s" %
(self, other))
return False