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Since 02c9e7a63f, common/path.h is
included within ctdb/tcp/tcp_connect.c. Therefore add ctdb-util
as a dependency for ctdb-tcp.
Signed-off-by: Anoop C S <anoopcs@samba.org>
Reviewed-by: Martin Schwenke <martin@meltin.net>
Autobuild-User(master): Martin Schwenke <martins@samba.org>
Autobuild-Date(master): Tue Oct 8 12:27:17 UTC 2024 on atb-devel-224
Automatic node address selection in the TCP transport does not work if
net.ipv4.ip_nonlocal_bind=1 because all nodes will be able to bind()
to the first address in the nodes list.
Before getting to the bind() step, add a check to see if an address is
local (i.e. on an interface). If not, it is not considered.
This is defensively coded so that this step is skipped if local
addresses can not be retrieved.
Signed-off-by: Martin Schwenke <mschwenke@ddn.com>
Reviewed-by: John Mulligan <jmulligan@redhat.com>
Reviewed-by: Anoop C S <anoopcs@samba.org>
This is a wrapper around getifaddrs(2), which is in libreplace, so
should always be available.
Some users want to set net.ipv4.ip_nonlocal_bind = 1. So, CTDB needs
a way of testing if public IPs are present, without using bind(2).
Doing all of this unconditionally in ctdb_sys_have_ip() will be
inefficient in the recovery daemon's local IP verification if there
are a lot of IP addresses. Split it this way so the interface
information can be retrieved once and used multiple times.
This doesn't appear to need IP canonicalisation for IPv4-mapped IPv6
addresses.
Signed-off-by: Martin Schwenke <mschwenke@ddn.com>
Reviewed-by: John Mulligan <jmulligan@redhat.com>
Reviewed-by: Anoop C S <anoopcs@samba.org>
CTDB's smnotify does not support IPv6 and is difficult to maintain.
So, create directories of files and pass them to NFS util's sm-notify.
There is an implied change here, because NFS utils sm-notify stopped
sending IP addresses as mon_name back in 2010:
http://git.linux-nfs.org/?p=steved/nfs-utils.git;a=commitdiff;h=900df0e7c0b9006d72d8459b30dc2cd69ce495a5
This will change advice given in the wiki to use a hostname for the
cluster with round-robin DNS, since this is what is best supported.
Another behavioural change is that sm-notify only sends "up"
notifications with an odd state.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Signed-off-by: Martin Schwenke <mschwenke@ddn.com>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
statd callout will shortly be updated to use NFS utils' sm-notify.
This tiny helper will be used to create on-disk state files used by
sm-notify. These state files contain endian-specific fields, so
better to write a simple C implementation than to do crazy things in a
shell script (or call out to Python).
Signed-off-by: Martin Schwenke <mschwenke@ddn.com>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This one is in a rarely used error path, so call a function that
talloc()s the string instead.
Again, this will also print the port, which might be useful if we ever
add the ability to also specify ports in the nodes list.
Signed-off-by: Martin Schwenke <mschwenke@ddn.com>
Reviewed-by: Volker Lendecke <vl@samba.org>
Autobuild-User(master): Volker Lendecke <vl@samba.org>
Autobuild-Date(master): Tue Aug 20 14:24:14 UTC 2024 on atb-devel-224
Similar to the recent changes to the ctdb server code, add the ability
to load the nodes from a subprocess stdout.
Signed-off-by: John Mulligan <jmulligan@redhat.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
ctdb_control_getnodesfile() calls ctdb_read_nodes(), which returns a
struct ctdb_node_map rather than the old version, so update associated
marshalling. While here modernise a debug message and wrap the
function arguments.
For ctdb_load_nodes_file() to use ctdb_read_nodes(), tweak
convert_node_map_to_list() to also use the modern node map structure.
Remove unused copy of ctdb_read_nodes_file().
Signed-off-by: Martin Schwenke <mschwenke@ddn.com>
Reviewed-by: Anoop C S <anoopcs@samba.org>
These functions are intended to be used in ctdbd, the ctdb tool and
fake_ctdbd, replacing the different copies in each place.
ctdb_read_nodes() will replace ctdb_read_nodes_file(). The name
change is intentional - in future the location may be something other
than a simple filename.
The static copies of ctdb_read_nodes_file() and node_map_add() are
slightly sanitised versions of those in tools/ctdb.c, with a call to
ctdb_parse_node_address(). A bit more care is taken in node_map_add()
to avoid undefined behaviour if talloc_realloc() fails.
ctdb_parse_node_address() will replace ctdb_parse_address(). There is
an obvious argument change, since the ctdb context argument was
unused. It can only fail on an invalid node address, so return a
bool. This function might be changed later to allow the input address
string to include an optional port.
Where to put this module isn't entirely clear. It could go in common,
so be part of ctdb-util. However, if it later needs
ctdb-conf (e.g. to allow the node list location to be configurable)
then there would be a direct cyclic dependency. This is configuration
handling, so conf/ seems sane. However, I didn't want to put it into
the ctdb-conf target, since some code might need to parse a nodes list
but not need to parse ctdb.conf.
Signed-off-by: Martin Schwenke <mschwenke@ddn.com>
Reviewed-by: Anoop C S <anoopcs@samba.org>
It has been a while since --with-libcephfs option was dropped. Therefore
stop advertising it through waf scripts.
Signed-off-by: Anoop C S <anoopcs@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Autobuild-User(master): Volker Lendecke <vl@samba.org>
Autobuild-Date(master): Tue Jul 2 09:13:20 UTC 2024 on atb-devel-224
Leave common/conf.[ch] where they are to make this commit
comprehensible.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Guenther Deschner <gd@samba.org>
Reviewed-by: Anoop C S <anoopcs@samba.org>
rpc.statd is single-threaded and runs its HA callout synchronously. If
it is too slow then latency accumulates and rpc.statd's backlog grows.
Running a pair of add-client/del-client events with the current code
averages ~0.030s in my test environment. This mean that 1000 clients
reclaiming locks after failover can easily cause 10s of latency. This
could cause rpc.statd to become unresponsive, resulting in a time out
for an rpcinfo-based health check of the status service.
Split the add-client/del-client events out to a standalone
statd_callout executable, written in C, to be used as the HA callout
for rpc.statd. All other functions move to statd_callout_helper.
Now, running a pair of add-client/del-client events in my test
environment averages only ~0.002s. This seems less likely to cause
latency problems.
The standalone statd_callout executable needs to read a configuration
file, which is generated by statd_callout_helper from the "startup"
event. It also needs access to a list of currently assigned public
IPs.
For backward compatibility, during installation a symlink is created
from $CTDB_BASE/statd-callout to the new statd_callout, which is
installed in the helper directory.
Testing this as part of the eventscript unit tests starts to become
even more of a hack than it used to be. However, the dependency on
stubs and the corresponding setup of fake state makes it hard to move
this elsewhere.
Signed-off-by: Martin Schwenke <mschwenke@ddn.com>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Autobuild-User(master): Martin Schwenke <martins@samba.org>
Autobuild-Date(master): Tue Jun 25 04:24:57 UTC 2024 on atb-devel-224
This simplifies and removes a bad hack. Also, in my test environment,
it also drops the average time take to run an add-client/del-client
pair from ~0.055s to ~0.030s.
Signed-off-by: Martin Schwenke <mschwenke@ddn.com>
Reviewed-by: Volker Lendecke <vl@samba.org>
This was an implementation of getline(3), use that instead.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Martin Schwenke <mschwenke@ddn.com>
Fix a problem where ctdb_killtcp (almost always) fails to capture
packets with --enable-pcap and libpcap ≥ 1.9.1. The problem is due to
a gradual change in libpcap semantics when using
pcap_get_selectable_fd(3PCAP) to get a file descriptor and then using
that file descriptor in non-blocking mode.
pcap_set_immediate_mode(3PCAP) says:
pcap_set_immediate_mode() sets whether immediate mode should be set
on a capture handle when the handle is activated. In immediate
mode, packets are always delivered as soon as they arrive, with no
buffering.
and
On Linux, with previous releases of libpcap, capture devices are
always in immediate mode; however, in 1.5.0 and later, they are, by
default, not in immediate mode, so if pcap_set_immediate_mode() is
available, it should be used.
However, it wasn't until libpcap commit
2ade7676101366983bd4f86bc039ffd25da8c126 (before libpcap 1.9.1) that
it became a requirement to use pcap_set_immediate_mode(), even with a
timeout of 0.
More explanation in this libpcap issue comment:
https://github.com/the-tcpdump-group/libpcap/issues/860#issuecomment-541204548
Do a configure check for pcap_set_immediate_mode() even though it has
existed for 10 years. It is easy enough.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15451
Signed-off-by: Martin Schwenke <mschwenke@ddn.com>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Autobuild-User(master): Amitay Isaacs <amitay@samba.org>
Autobuild-Date(master): Tue Aug 15 10:53:52 UTC 2023 on atb-devel-224
This forces the use pcap for packet capture on Linux.
It appears that using a raw socket for capture does not work with
infiniband - pcap support for that to come.
Don't (yet?) change the default capture method to pcap. On some
platforms (e.g. my personal Intel NUC, running Debian testing), pcap
is much less reliable than the raw socket. However, pcap seems fine
on most other platforms.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
The build currently fails on AIX, which can't find the pcap headers
because they're installed in a non-standard place. However, there is
a pcap-config script available.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
In future this will allow extra I/O tests and a timeout in the parent
to (hopefully) release the lock if the child gets wedged. For
simplicity, use tmon only to detect when either parent or child goes
away. Plumbing a timeout for pings from child to parent will be done
later.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
tmon_ping_test covers complex 2-way interaction between processes
using tmon_ping_send(), including via a socketpair(). tmon_test
covers the more general functionality of tmon_send() but uses a
simpler 1-way harness with wide coverage.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
A convention when testing members of ctdb-util is to include the .c
file so that static functions can potentially be tested. This means
that such tests can't be linked against ctdb-util or duplicate symbols
will be encountered.
ctdb-tests-common depends on ctdb-client, which depends in turn on
ctdb-util, so this can't be used to pull in backtrace support.
Instead, make ctdb-tests-backtrace its own subsystem.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Also, rename ctdb_unit_tests to ctdb_util_tests. The sorting makes
it clear that only items from ctdb-util are tested here.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
The include isn't strictly necessary, since it is included via
common/reqid.c anyway. However, it is a useful hint.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Autobuild-User(master): Amitay Isaacs <amitay@samba.org>
Autobuild-Date(master): Fri Jul 22 17:01:00 UTC 2022 on sn-devel-184
These are easier to debug with a backtrace.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Autobuild-User(master): Amitay Isaacs <amitay@samba.org>
Autobuild-Date(master): Tue May 3 10:13:23 UTC 2022 on sn-devel-184
Some tests make generous use of assert() and it can be difficult to
guess the cause of failures without resorting to GDB. This provides
some help.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
None of these include any files from the include/ sub-directory.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This aims to test ctdb_tunable_load_file() but also exercises
ctdb_tunable_names() and ctdb_tunable_get_value().
ctdb_tunable_set_value() is indirectly exercised via
ctdb_tunable_load_file().
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Debugging a test failure here without GDB is not possible. Dumping a
stack trace gives a good hint.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
The new waf detects a duplicate instance of
ctdb_mutex_ceph_rados_helper.7.xml, which is due
to manpages_extra being a pointer to
manpages_misc, therefore each call to build()
added duplicate entries to the manpages_misc
global entry.
Signed-off-by: David Mulder <dmulder@suse.com>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
The standalone build still includes tests, as does the top-level build
when --enable-selftest is used. The latter is consistent with the use
of --enable-selftest in the rest of the tree.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
The standalone build still includes tests, as does the top-level build
when --enable-selftest is used. The latter is consistent with the use
of --enable-selftest in the rest of the tree.
Signed-off-by: Martin Schwenke <martin@meltin.net>
This is the default and deciding this should be left to run_tests.sh.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
