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Accommodate Netgate's usecase, they create the linux netlink device first, and then call the pair_create; in that case, linux_parent_if_index already exists; simplify the call path here, h/t mgsmith@

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Pim van Pelt
2021-09-08 18:41:35 +00:00
parent 36f1ebfdae
commit 3c806d586d
1 changed files with 33 additions and 24 deletions
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47
lcpng_interface.c
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@ -790,13 +790,13 @@ lcp_itf_pair_create (u32 phy_sw_if_index, u8 *host_if_name,
/* sub interfaces do not need a tap created */ /* sub interfaces do not need a tap created */
if (vnet_sw_interface_is_sub (vnm, phy_sw_if_index)) if (vnet_sw_interface_is_sub (vnm, phy_sw_if_index))
{ {
const lcp_itf_pair_t *llip; index_t parent_if_index;
index_t parent_if_index, linux_parent_if_index;
int orig_ns_fd, vif_ns_fd; int orig_ns_fd, vif_ns_fd;
clib_error_t *err; clib_error_t *err;
u16 outer_vlan, inner_vlan; u16 outer_vlan, inner_vlan;
u16 outer_proto, inner_proto; u16 outer_proto, inner_proto;
u16 vlan, proto; u16 vlan, proto;
u32 parent_vif_index;
if (sw->type == VNET_SW_INTERFACE_TYPE_SUB && sw->sub.eth.flags.exact_match == 0) { if (sw->type == VNET_SW_INTERFACE_TYPE_SUB && sw->sub.eth.flags.exact_match == 0) {
LCP_ITF_PAIR_ERR ("pair_create: can't create LCP for a sub-interface without exact-match set"); LCP_ITF_PAIR_ERR ("pair_create: can't create LCP for a sub-interface without exact-match set");
@ -828,6 +828,8 @@ lcp_itf_pair_create (u32 phy_sw_if_index, u8 *host_if_name,
"sub-interface without an LCP on the parent"); "sub-interface without an LCP on the parent");
return VNET_API_ERROR_INVALID_ARGUMENT; return VNET_API_ERROR_INVALID_ARGUMENT;
} }
LCP_ITF_PAIR_DBG ("pair_create: parent %U", format_lcp_itf_pair, lip);
parent_vif_index = lip->lip_vif_index;
/* /*
* Find the parent tap: * Find the parent tap:
@ -835,31 +837,38 @@ lcp_itf_pair_create (u32 phy_sw_if_index, u8 *host_if_name,
* - if this is an inner VLAN, find the pair from the outer sub-int, which must exist. * - if this is an inner VLAN, find the pair from the outer sub-int, which must exist.
*/ */
if (inner_vlan) { if (inner_vlan) {
vlan=inner_vlan; index_t linux_parent_if_index;
proto=inner_proto; const lcp_itf_pair_t *llip;
vlan = inner_vlan;
proto = inner_proto;
linux_parent_if_index = lcp_itf_pair_find_by_outer_vlan ( linux_parent_if_index = lcp_itf_pair_find_by_outer_vlan (
sw->sup_sw_if_index, sw->sub.eth.outer_vlan_id, sw->sup_sw_if_index, sw->sub.eth.outer_vlan_id,
sw->sub.eth.flags.dot1ad); sw->sub.eth.flags.dot1ad);
if (INDEX_INVALID == linux_parent_if_index) { if (INDEX_INVALID == linux_parent_if_index)
LCP_ITF_PAIR_ERR ("pair_create: can't find LCP for outer vlan %d proto %s on %U", {
outer_vlan, outer_proto==ETH_P_8021AD?"dot1ad":"dot1q", LCP_ITF_PAIR_ERR (
format_vnet_sw_if_index_name, vnet_get_main (), hw->sw_if_index); "pair_create: can't find LCP for outer vlan %d proto %s on %U",
outer_vlan, outer_proto == ETH_P_8021AD ? "dot1ad" : "dot1q",
format_vnet_sw_if_index_name, vnet_get_main (),
hw->sw_if_index);
return VNET_API_ERROR_INVALID_SW_IF_INDEX; return VNET_API_ERROR_INVALID_SW_IF_INDEX;
} }
} else {
vlan=outer_vlan;
proto=outer_proto;
linux_parent_if_index = parent_if_index;
}
llip = lcp_itf_pair_get (linux_parent_if_index); llip = lcp_itf_pair_get (linux_parent_if_index);
if (!llip) { if (!llip)
LCP_ITF_PAIR_ERR ("pair_create: can't create LCP for a sub-interface without a valid Linux parent"); {
LCP_ITF_PAIR_ERR ("pair_create: can't create LCP for a "
"sub-interface without a valid Linux parent");
return VNET_API_ERROR_INVALID_ARGUMENT; return VNET_API_ERROR_INVALID_ARGUMENT;
} }
LCP_ITF_PAIR_DBG ("pair_create: parent %U", format_lcp_itf_pair, lip); LCP_ITF_PAIR_DBG ("pair_create: linux parent %U",
LCP_ITF_PAIR_DBG ("pair_create: linux parent %U", format_lcp_itf_pair, llip); format_lcp_itf_pair, llip);
parent_vif_index = llip->lip_vif_index;
} else {
vlan=outer_vlan;
proto=outer_proto;
}
/* /*
* see if the requested host interface has already been created * see if the requested host interface has already been created
@ -884,7 +893,7 @@ lcp_itf_pair_create (u32 phy_sw_if_index, u8 *host_if_name,
/* /*
* no existing host interface, create it now * no existing host interface, create it now
*/ */
err = lcp_netlink_add_link_vlan (llip->lip_vif_index, vlan, proto, err = lcp_netlink_add_link_vlan (parent_vif_index, vlan, proto,
(const char *) host_if_name); (const char *) host_if_name);
if (err != 0) { if (err != 0) {
LCP_ITF_PAIR_ERR ("pair_create: cannot create link outer(proto:0x%04x,vlan:%u).inner(proto:0x%04x,vlan:%u) name:'%s'", LCP_ITF_PAIR_ERR ("pair_create: cannot create link outer(proto:0x%04x,vlan:%u).inner(proto:0x%04x,vlan:%u) name:'%s'",