virtio: fix to use chained descriptors when missing indirect descriptor - vpp

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author	Mohsin Kazmi <sykazmi@cisco.com>	2020-04-10 14:57:06 +0000
committer	Damjan Marion <dmarion@me.com>	2020-04-17 16:36:45 +0000
commit	ce21599c8af34a3f9da813a3c953a38a16316b4d (patch)
tree	7ac332437239cf76d90d9e56d8cc82723ac301d0 /src/vnet/util/refcount.h
parent	82fc98fa4578dbbfb156effb11dea6a4e2d0b898 (diff)

virtio: fix to use chained descriptors when missing indirect descriptor

Some vhost-backed missing the VIRTIO_RING_F_INDIRECT_DESC feature. Previously, vpp doesn't support jumbo frames using chained descriptors. This patch fixes this issue. Type: fix Change-Id: I20487e201e88ea136b556ac84dde058019ab3e78 Signed-off-by: Mohsin Kazmi <sykazmi@cisco.com>

Diffstat (limited to 'src/vnet/util/refcount.h')

0 files changed, 0 insertions, 0 deletions

#!/usr/bin/env python3 # Copyright (c) 2015 Cisco and/or its affiliates. # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at: # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. import ipaddress import argparse import sys # map add domain ip4-pfx <pfx> ip6-pfx ::/0 ip6-src <ip6-src> ea-bits-len 0 psid-offset 6 psid-len 6 # map add rule index <0> psid <psid> ip6-dst <ip6-dst> def_ip4_pfx = '192.0.2.0/24' def_ip6_pfx = '2001:db8::/32' def_ip6_src = '2001:db8::1' def_psid_offset = 6 def_psid_len = 6 def_ea_bits_len = 0 parser = argparse.ArgumentParser(description='MAP VPP configuration generator') parser.add_argument('-t', action="store", dest="mapmode") parser.add_argument('-f', action="store", dest="format", default="vpp") parser.add_argument('--ip4-prefix', action="store", dest="ip4_pfx", default=def_ip4_pfx) parser.add_argument('--ip6-prefix', action="store", dest="ip6_pfx", default=def_ip6_pfx) parser.add_argument('--ip6-src', action="store", dest="ip6_src", default=def_ip6_src) parser.add_argument('--psid-len', action="store", dest="psid_len", default=def_psid_len) parser.add_argument('--psid-offset', action="store", dest="psid_offset", default=def_psid_offset) parser.add_argument('--ea-bits-len', action="store", dest="ea_bits_len", default=def_ea_bits_len) args = parser.parse_args() # # Print domain # def domain_print(i, ip4_pfx, ip6_pfx, ip6_src, eabits_len, psid_offset, psid_len): if format == 'vpp': print("map add domain ip4-pfx " + ip4_pfx + " ip6-pfx", ip6_pfx, "ip6-src " + ip6_src + " ea-bits-len", eabits_len, "psid-offset", psid_offset, "psid-len", psid_len) if format == 'confd': print("vpp softwire softwire-instances softwire-instance", i, "br-ipv6 " + ip6_src + " ipv6-prefix " + ip6_pfx + " ipv4-prefix " + ip4_pfx + " ea-bits-len", eabits_len, "psid-offset", psid_offset, "psid-len", psid_len) if format == 'xml': print("<softwire-instance>") print("<id>", i, "</id>"); print(" <br-ipv6>" + ip6_src + "</br-ipv6>") print(" <ipv6-prefix>" + ip6_pfx + "</ipv6-prefix>") print(" <ipv4-prefix>" + ip4_pfx + "</ipv4-prefix>") print(" <ea-len>", eabits_len, "</ea-len>") print(" <psid-len>", psid_len, "</psid-len>") print(" <psid-offset>", psid_offset, "</psid-offset>") def domain_print_end(): if format == 'xml': print("</softwire-instance>") def rule_print(i, psid, dst): if format == 'vpp': print("map add rule index", i, "psid", psid, "ip6-dst", dst) if format == 'confd': print("binding", psid, "ipv6-addr", dst) if format == 'xml': print(" <binding>") print(" <psid>", psid, "</psid>") print(" <ipv6-addr>", dst, "</ipv6-addr>") print(" </binding>") # # Algorithmic mapping Shared IPv4 address # def algo(ip4_pfx_str, ip6_pfx_str, ip6_src_str, ea_bits_len, psid_offset, psid_len, ip6_src_ecmp = False): domain_print(0, ip4_pfx_str, ip6_pfx_str, ip6_src_str, ea_bits_len, psid_offset, psid_len) domain_print_end() # # 1:1 Full IPv4 address # def lw46(ip4_pfx_str, ip6_pfx_str, ip6_src_str, ea_bits_len, psid_offset, psid_len, ip6_src_ecmp = False): ip4_pfx = ipaddress.ip_network(ip4_pfx_str) ip6_src = ipaddress.ip_address(ip6_src_str) ip6_dst = ipaddress.ip_network(ip6_pfx_str) psid_len = 0 mod = ip4_pfx.num_addresses / 1024 for i in range(ip4_pfx.num_addresses): domain_print(i, str(ip4_pfx[i]) + "/32", str(ip6_dst[i]) + "/128", str(ip6_src), 0, 0, 0) domain_print_end() if ip6_src_ecmp and not i % mod: ip6_src = ip6_src + 1 # # 1:1 Shared IPv4 address, shared BR (16) VPP CLI # def lw46_shared(ip4_pfx_str, ip6_pfx_str, ip6_src_str, ea_bits_len, psid_offset, psid_len, ip6_src_ecmp = False): ip4_pfx = ipaddress.ip_network(ip4_pfx_str) ip6_src = ipaddress.ip_address(ip6_src_str) ip6_dst = ipaddress.ip_network(ip6_pfx_str) mod = ip4_pfx.num_addresses / 1024 for i in range(ip4_pfx.num_addresses): domain_print(i, str(ip4_pfx[i]) + "/32", "::/0", str(ip6_src), 0, 0, psid_len) for psid in range(0x1 << int(psid_len)): rule_print(i, psid, str(ip6_dst[(i * (0x1<<int(psid_len))) + psid])) domain_print_end() if ip6_src_ecmp and not i % mod: ip6_src = ip6_src + 1 # # 1:1 Shared IPv4 address, shared BR # def lw46_shared_b(ip4_pfx_str, ip6_pfx_str, ip6_src_str, ea_bits_len, psid_offset, psid_len, ip6_src_ecmp = False): ip4_pfx = ipaddress.ip_network(ip4_pfx_str) ip6_src = ipaddress.ip_address(ip6_src_str) ip6_dst = list(ipaddress.ip_network(ip6_pfx_str).subnets(new_prefix=56)) mod = ip4_pfx.num_addresses / 1024 for i in range(ip4_pfx.num_addresses): domain_print(i, str(ip4_pfx[i]) + "/32", "::/0", str(ip6_src), 0, 0, psid_len) for psid in range(0x1 << psid_len): enduserprefix = list(ip6_dst.pop(0).subnets(new_prefix=64))[255-1] rule_print(i, psid, enduserprefix[(i * (0x1<<psid_len)) + psid]) domain_print_end() if ip6_src_ecmp and not i % mod: ip6_src = ip6_src + 1 def xml_header_print(): print(''' <?xml version="1.0" encoding="UTF-8"?> <hello xmlns="urn:ietf:params:xml:ns:netconf:base:1.0"> <capabilities> <capability>urn:ietf:params:netconf:base:1.0</capability> </capabilities> </hello> ]]>]]> <?xml version="1.0" encoding="UTF-8"?> <rpc xmlns="urn:ietf:params:xml:ns:netconf:base:1.0" message-id="1"> <edit-config> <target> <candidate/> </target> <config> <vpp xmlns="http://www.cisco.com/yang/cisco-vpp"> <softwire> <softwire-instances> ''') def xml_footer_print(): print(''' </softwire-instances> </softwire> </vpp> </config> </edit-config> </rpc> ]]>]]> <?xml version="1.0" encoding="UTF-8"?> <rpc xmlns="urn:ietf:params:xml:ns:netconf:base:1.0" message-id="2"> <close-session/> </rpc> ]]>]]> ''') format = args.format if format == 'xml': xml_header_print() globals()[args.mapmode](args.ip4_pfx, args.ip6_pfx, args.ip6_src, args.ea_bits_len, args.psid_offset, args.psid_len) if format == 'xml': xml_footer_print()


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