This fixes the problem reported in:
https://bugzilla.redhat.com/show_bug.cgi?id=868389
Previously, the dnsmasq hosts file (used for static dhcp entries, and
addnhosts file (used for additional dns host entries) were only
created/referenced on the dnsmasq commandline if there was something
to put in them at the time the network was started. Once we can update
a network definition while it's active (which is now possible with
virNetworkUpdate), this is no longer a valid strategy - if there were
0 dhcp static hosts (resulting in no reference to the hosts file on the
commandline), then one was later added, the commandline wouldn't have
linked dnsmasq up to the file, so even though we create it, dnsmasq
doesn't pay any attention.
The solution is to just always create these files and reference them
on the dnsmasq commandline (almost always, anyway). That way dnsmasq
can notice when a new entry is added at runtime (a SIGHUP is sent to
dnsmasq by virNetworkUdpate whenever a host entry is added or removed)
The exception to this is that the dhcp static hosts file isn't created
if there are no lease ranges *and* no static hosts. This is because in
this case dnsmasq won't be setup to listen for dhcp requests anyway -
in that case, if the count of dhcp hosts goes from 0 to 1, dnsmasq
will need to be restarted anyway (to get it listening on the dhcp
port). Likewise, if the dhcp hosts count goes from 1 to 0 (and there
are no dhcp ranges) we need to restart dnsmasq so that it will stop
listening on port 67. These special situations are handled in the
bridge driver's networkUpdate() by checking for ((bool)
nranges||nhosts) both before and after the update, and triggering a
dnsmasq restart if the before and after don't match.
(cherry picked from commit 1cb1f9dabf)
This patch removed the "--filterwin2k" dnsmasq command line
parameter which was unnecessary for domain specification,
possibly blocked some usage, and was command line clutter.
Gene Czarcinski <gene@czarc.net>
dnsmasq is forwarding a number of queries upstream that should not
be done. There still remains an MX query for a plain name with no
domain specified that will be forwarded is dnsmasq has --domain=xxx
--local=/xxx/ specified. This does not happen with no domain name
and --local=// ... not a libvirt problem.
BTW, thanks again to Claudio Bley!
The path to the dnsmasq binary can be configured while in the test data
the path is hard-coded to /usr/bin/. This break the test suite if a the
binary is located in a different location, like /usr/local/sbin/.
Replace the hard coded path in the test data by a token, which is
dynamically replaced in networkxml2argvtest with the configured path
after the test data has been loaded.
(Another option would have been to modify configure.ac to generate the
test data during configure, but I do not know of an easy way do trick
configure into mass-generate those test files without listing every
single one, which I consider less flexible.)
- unit-test the unit-test:
#include <assert.h>
#define TEST(in,token,rep,out) { char *buf = strdup(in); assert(!replaceTokens(&buf, token, rep) && !strcmp(buf, out)); free(buf); }
TEST("", "AA", "B", "");
TEST("A", "AA", "B", "A");
TEST("AA", "AA", "B", "B");
TEST("AAA", "AA", "B", "BA");
TEST("AA", "AA", "BB", "BB");
TEST("AA", "AA", "BBB", "BBB");
TEST("<AA", "AA", "B", "<B");
TEST("<AA", "AA", "BB", "<BB");
TEST("<AA", "AA", "BBB", "<BBB");
TEST("AA>", "AA", "B", "B>");
TEST("AA>", "AA", "BB", "BB>");
TEST("AA>", "AA", "BBB", "BBB>");
TEST("<AA>", "AA", "B", "<B>");
TEST("<AA>", "AA", "BB", "<BB>");
TEST("<AA>", "AA", "BBB", "<BBB>");
TEST("<AA|AA>", "AA", "B", "<B|B>");
TEST("<AA|AA>", "AA", "BB", "<BB|BB>");
TEST("<AA|AA>", "AA", "BBB", "<BBB|BBB>");
TEST("<AAAA>", "AA", "B", "<BB>");
TEST("<AAAA>", "AA", "BB", "<BBBB>");
TEST("<AAAA>", "AA", "BBB", "<BBBBBB>");
TEST("AAAA>", "AA", "B", "BB>");
TEST("AAAA>", "AA", "BB", "BBBB>");
TEST("AAAA>", "AA", "BBB", "BBBBBB>");
TEST("<AAAA", "AA", "B", "<BB");
TEST("<AAAA", "AA", "BB", "<BBBB");
TEST("<AAAA", "AA", "BBB", "<BBBBBB");
alarm(1); /* no infinite loop */
TEST("A", "A", "A", "A");
TEST("AA", "A", "A", "AA");
alarm(0);
Signed-off-by: Philipp Hahn <hahn@univention.de>
If a domain name is defined for a network, add the --expand-hosts
option to the dnsmasq commandline. This results in the domain being
added to any hostname that is defined in a dns <host> element and
contains no '.' characters (i.e. it is an "unqualified"
hostname). Since PTR records are automatically created for any name
defined in <host>, the result of a PTR request will change from the
unqualified name to the qualified name.
This also has the same effect on any hostnames that dnsmasq reads
from the host's /etc/hosts file.
(In the case of guest hostnames that were learned by dnsmasq via DHCP
requests, they were already getting the domain name added on, even
without --expand-hosts).
The regression testing done by comparison of command-line
generated from the network XML file and the expected
command-line arguments (read from file).
Signed-off-by: Michal Novotny <minovotn@redhat.com>
