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User-configurable physical MTU for individual links

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This patch allows users to specify the physical layer MTU for individual links
when in multipath mode. For example:

{
  "settings":
  {
    "defaultBondingPolicy": "custom-balance-xor",
    "policies":
    {
      "custom-balance-xor":
      {
        "basePolicy": "balance-xor",
        "failoverInterval": 5000,
        "links": {
          "weird_5g_link": { "mtu": 1300 },
          "enp5s0": { "mtu": 1400  }
        }
      }
    }
  }
}
This commit is contained in:
Joseph Henry 2023-01-11 20:12:15 -08:00 • committed by Sean OMeara
parent eccc31a4b9
commit 39f3f5b2d9
6 changed files with 36 additions and 7 deletions
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3
node/Bond.cpp
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@ -184,7 +184,7 @@ SharedPtr<Link> Bond::getLinkBySocket(const std::string& policyAlias, uint64_t l
auto search = _interfaceToLinkMap[policyAlias].find(ifnameStr);
if (search == _interfaceToLinkMap[policyAlias].end()) {
if (createIfNeeded) {
SharedPtr<Link> s = new Link(ifnameStr, 0, 0, true, ZT_BOND_SLAVE_MODE_PRIMARY, "");
SharedPtr<Link> s = new Link(ifnameStr, 0, 0, 0, true, ZT_BOND_SLAVE_MODE_PRIMARY, "");
_interfaceToLinkMap[policyAlias].insert(std::pair<std::string, SharedPtr<Link> >(ifnameStr, s));
return s;
}
@ -1253,6 +1253,7 @@ void Bond::estimatePathQuality(int64_t now)
if (link) {
int linkSpeed = link->capacity();
_paths[i].p->_givenLinkSpeed = linkSpeed;
_paths[i].p->_mtu = link->mtu();
maxObservedLinkCap = linkSpeed > maxObservedLinkCap ? linkSpeed : maxObservedLinkCap;
}
}