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test: Improve logic for waiting for SLAAC & DAD to complete in NDP tests

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Since 9a0e544f05 the NDP tests attempt to explicitly wait for DAD to
complete, rather than just having a hard coded sleep.  However, the
conditions we use are a bit sloppy and allow for a number of possible cases
where it might not work correctly.  Stefano seems to be hitting one of
these (though I'm not sure which) with some later patches.

 - We wait for *lack* of a tentative address, so if the first check occurs
   before we have even a tentative address it will bypass the delay
 - It's not entirely clear if the permanent address will always appear
   as soon as the tentative address disappears
 - We weren't filtering on interface
 - We were doing the filtering with ip-address options rather than in jq.
   However in at least in some circumstances this seems to result in an
   empty .addr_info field, rather than omitting it entirely, which could
   cause us to get the wrong result

So, instead, explicitly wait for the address we need to be present: an
RA provided address on the external interface.  While we're here we remove
the requirement that it have global scope: the "kernel_ra" check is already
sufficient to make sure this address comes from an NDP RA, not something
else.  If it's not the global scope address we expect, better to check it
and fail, rather than keep waiting.

Fixes: 9a0e544f05 ("test: Improve test for NDP assigned prefix")
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
This commit is contained in:
David Gibson 2024-11-26 14:27:27 +11:00 committed by Stefano Brivio
parent cda7f160f0
commit c6e6106413
2 changed files with 6 additions and 6 deletions
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6
test/passt/ndp
View File

@ -17,13 +17,13 @@ htools ip jq sipcalc grep cut
test Interface name
gout IFNAME ip -j link show | jq -rM '.[] | select(.link_type == "ether").ifname'
guest ip link set dev __IFNAME__ up
# Wait for DAD to complete
guest while ip -j -6 addr show tentative | jq -e '.[].addr_info'; do sleep 0.1; done
# Wait for SLAAC & DAD to complete
guest while ! ip -j -6 addr show dev __IFNAME__ | jq -e '.[].addr_info.[] | select(.protocol == "kernel_ra")'; do sleep 0.1; done
hout HOST_IFNAME6 ip -j -6 route show|jq -rM '[.[] | select(.dst == "default").dev] | .[0]'
check [ -n "__IFNAME__" ]
test SLAAC: prefix
gout ADDR6 ip -j -6 addr show|jq -rM '[.[] | select(.ifname == "__IFNAME__").addr_info[] | select(.scope == "global" and .protocol == "kernel_ra") | .local + "/" + (.prefixlen | tostring)] | .[0]'
gout ADDR6 ip -j -6 addr show|jq -rM '[.[] | select(.ifname == "__IFNAME__").addr_info[] | select(.protocol == "kernel_ra") | .local + "/" + (.prefixlen | tostring)] | .[0]'
gout PREFIX6 sipcalc __ADDR6__ | grep prefix | cut -d' ' -f4
hout HOST_ADDR6 ip -j -6 addr show|jq -rM '[.[] | select(.ifname == "__HOST_IFNAME6__").addr_info[] | select(.scope == "global" and .deprecated != true).local] | .[0]'
hout HOST_PREFIX6 sipcalc __HOST_ADDR6__/64 | grep prefix | cut -d' ' -f4

6
test/pasta/ndp
View File

@ -18,11 +18,11 @@ test Interface name
nsout IFNAME ip -j link show | jq -rM '.[] | select(.link_type == "ether").ifname'
check [ -n "__IFNAME__" ]
ns ip link set dev __IFNAME__ up
# Wait for DAD to complete
ns while ip -j -6 addr show tentative | jq -e '.[].addr_info'; do sleep 0.1; done
# Wait for SLAAC & DAD to complete
ns while ! ip -j -6 addr show dev __IFNAME__ | jq -e '.[].addr_info.[] | select(.protocol == "kernel_ra")'; do sleep 0.1; done
test SLAAC: prefix
nsout ADDR6 ip -j -6 addr show|jq -rM '[.[] | select(.ifname == "__IFNAME__").addr_info[] | select(.scope == "global" and .protocol == "kernel_ra") | .local + "/" + (.prefixlen | tostring)] | .[0]'
nsout ADDR6 ip -j -6 addr show|jq -rM '[.[] | select(.ifname == "__IFNAME__").addr_info[] | select(.protocol == "kernel_ra") | .local + "/" + (.prefixlen | tostring)] | .[0]'
nsout PREFIX6 sipcalc __ADDR6__ | grep prefix | cut -d' ' -f4
hout HOST_ADDR6 ip -j -6 addr show|jq -rM ['.[] | select(.ifname == "__IFNAME__").addr_info[] | select(.scope == "global" and .deprecated != true).local] | .[0]'
hout HOST_PREFIX6 sipcalc __HOST_ADDR6__/64 | grep prefix | cut -d' ' -f4