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This patch is essentially the same as the previous version, but has
been respun to fix up some merge conflicts with some of Chuck's
recent changes.
When we first added tirpc support, we took a "big hammer" approach, and
had it add libtirpc to $LIBS. That had the effect of making it so that
that library was linked into every binary. That's unnecessary, and
wasteful with memory.
Don't let AC_CHECK_LIB add -ltirpc to $LIBS. Instead, have the autoconf
tests set $(LIBTIRPC) in the makefiles, and have the programs that
need it explicitly include that library. In the event that we're not
using libtirpc, then set $LIBTIRPC to a blank string.
This necessitates a change to the bindresvport_sa check too. Since that
library is no longer included in $LIBS, we need to convert that check
to use AC_CHECK_LIB instead of AC_CHECK_FUNCS.
This patch also fixes a subtle bug. If the library was usable, but the
includes were not, the test would set $enable_tirpc to "no", but
HAVE_LIBTIRPC would still be true. That configuration would likely
fail to build.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve Dickson <steved@redhat.com>
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Commit 1ea2c3be: "nfs-utils: Remove all uses of AI_ADDRCONFIG,"
(October 28, 2010) removed the last use of AI_ADDRCONFIG. Even so,
ipv6.m4 uses this check to ensure that the local getaddrinfo(3)
implementation is recent. Maybe we shouldn't bother.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Steve Dickson <steved@redhat.com>
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After glibc 2.3.3, getifaddrs(3) can return AF_INET6 addresses for
local network interfaces. Using the library call is easier than
trying to update the open code in from_local(), and means we have
less to maintain in nfs-utils going forward.
And, since from_local() can now support IPv6, change its synopsis to
take a "struct sockaddr *" .
Note that the original code discovers local addresses once. These
days, with wifi, DHCP, and NetworkManager, the local network
configuration can change dynamically over time. So, call getifaddrs()
more often to ensure from_local() has up-to-date network configuration
information.
This implementation refreshes the list if from_local() has not been
called in the last second. This is actually not terribly honerous.
check_default() invokes from_local() only when the remote host is not
in its access cache, or the access/deny files have changed.
So new hosts will cause a refresh, but previously seen hosts
(including localhost) should not.
On the other hand, it still may not be often enough. After the first
call, if only previously seen hosts attempt to access our daemons,
from_local() would never be called, and the local list would never be
updated. This might be possible during steady-state operation with
a small number of servers and clients.
It would also be nice if we could free the local interface address
list at shutdown time, but that would be a lot of trouble for little
gain.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
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specified, but TIRPC libs or headers aren't present then just throw a
warning and disable it. If it was explicitly specified, then throw an
error and exit if they aren't present.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve Dickson <steved@redhat.com>
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AC_CHECK_FUNC and AC_CHECK_FUNCS take 3 args. Any ones beyond that are
ignored. In several places, we're passing the "action-if-not-found" in
as the 4th arg so it's being ignored.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Steve Dickson <steved@redhat.com>
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Clean up: for consistency with other local feature checks, move IPv6
feature checks into aclocal/
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Steve Dickson <steved@redhat.com>
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