Fixes#3374. The problem is that we set MACPolicy=persistent (i.e. we would
like to generate persistent MAC addresses for interfaces which don't have a
fixed MAC address), but various virtual interfaces including bridges, tun/tap,
bonds, etc., do not not have the necessary ID_NET_NAME_* attributes and udev
would not assing the address and warn:
Could not generate persistent MAC address for $name: No such file or directory
Basic requirements which I think a solution for this needs to satisfy:
1. No changes to MAC address generation for those cases which are currently
handled successfully. This means that net_get_unique_predictable_data() must
keep returning the same answer, which in turn means net_get_name() must keep
returning the same answer. We can only add more things we look at with lower
priority so that we start to cover cases which were not covered before.
2. Like 1, but for IPvLL seed and DHCP IAD. This is less important, but "nice
to have".
3. Keep MACPolicy=persistent. If people don't want it, they can always apply
local configuration, but in general stable MACs are a good thing. I have never
seen anyone complain about that.
== Various approaches that have been proposed
=== https://github.com/systemd/systemd/issues/3374#issuecomment-223753264 (tomty89)
if !ID_BUS and INTERFACE, use INTERFACE
I think this almost does the good thing, but I don't see the reason to reject ID_BUS
(i.e. physical hardware). Stable MACs are very useful for physical hardware that has
no physical MAC.
=== https://github.com/systemd/systemd/issues/3374#issuecomment-224733069 (teg)
if (should_rename(device, true))
This means looking at name_assign_type. In particular for
NET_NAME_USER should_rename(..., true) returns true. It only returns false
for NET_NAME_PREDICTABLE. So this would cover stuff like br0, bond0, etc,
but would not cover lo and other devices with predictable names. That doesn't
make much sense.
But did teg mean should_rename() or !should_rename()?
=== https://github.com/systemd/systemd/issues/3374#issuecomment-234628502 (tomty89):
+ if (!should_rename(device, true))
+ return udev_device_get_sysname(device)
This covers only devices with NET_NAME_PREDICTABLE. Since the problem applies as
much to bridges and such, this isn't neough.
=== https://github.com/systemd/systemd/issues/3374#issuecomment-281745967 (grafi-tt)
+ /* if the machine doesn't provide data about the device, use the ifname specified by userspace
+ * (this is the case when the device is virtual, e.g., bridge or bond) */
+ s = udev_device_get_sysattr_value(device, "name_assign_type");
+ if (s && safe_atou(s, &type) >= 0 && type == NET_NAME_USER)
+ return udev_device_get_sysname(device);
This does not cover bond0, vnet0, tun/tap and similar.
grafi-tt also proposes patching the kernel, but *not* setting name_assign_type
seems intentional in those cases, because the device name is a result of
enumeration, not set by the userspace.
=== https://github.com/systemd/systemd/issues/3374#issuecomment-288882355 (tomty89)
(also PR #11372)
- MACAddressPolicy=persistent
This break requirement 3. above. It would solve the immediate problem, but I
think the disruption is too big.
=== This patch
This patch means that we will set a "stable" MAC for pretty much any virtual
device by default, where "stable" means keyed off the machine-id and interface
name.
It seems like a big change, but we already did this for most physical devices.
Doing it also for virtual devices doesn't seem like a big issue. It will make
the setup and monitoring of virtualized networks slightly nicer. I don't think
anyone is depending on having the MAC address changed when those devices are
destoryed and recreated. If they do, they'd have to change MACAddressPolicy=.
== Implementation
net_get_name() is called from dhcp_ident_set_iaid() so I didn't change
net_get_name() like in grafi-tt's patch, but net_get_unique_predictable_data().
net_get_unique_predictable_data() is called from get_mac() in link-config.c
and sd_ipv4ll_set_address_seed(), so both of those code paths are affected
and will now get data in some cases where they errored out previously.
The return code is changed to -ENODATA since that gives a nicer error string.
Otherwise, LIST_REMOVE() in network_free() fails.
This fixes the following assertion:
```
systemd-networkd[2595]: Bus bus-api-network: changing state UNSET → OPENING
systemd-networkd[2595]: Bus bus-api-network: changing state OPENING → AUTHENTICATING
systemd-networkd[2595]: timestamp of '/etc/systemd/network' changed
systemd-networkd[2595]: /etc/systemd/network/10-hoge.network:1: Invalid section header '[Network]Address=192.168.0.1'
systemd-networkd[2595]: /etc/systemd/network/10-hoge.network:1: Failed to parse file: Bad message
systemd-networkd[2595]: Assertion '*_head == _item' failed at ../../home/watanabe/git/systemd/src/network/networkd-network.c:378, function network_free(). Aborting.
valgrind[2595]: ==2595==
valgrind[2595]: ==2595== Process terminating with default action of signal 6 (SIGABRT): dumping core
valgrind[2595]: ==2595== at 0x4BCA53F: raise (in /usr/lib64/libc-2.28.so)
valgrind[2595]: ==2595== by 0x4BB4894: abort (in /usr/lib64/libc-2.28.so)
valgrind[2595]: ==2595== by 0x4955F09: log_assert_failed_realm (log.c:795)
valgrind[2595]: ==2595== by 0x417101: network_free (networkd-network.c:378)
valgrind[2595]: ==2595== by 0x415E99: network_freep (networkd-network.h:282)
valgrind[2595]: ==2595== by 0x416AB2: network_load_one (networkd-network.c:101)
valgrind[2595]: ==2595== by 0x416C39: network_load (networkd-network.c:293)
valgrind[2595]: ==2595== by 0x414031: manager_load_config (networkd-manager.c:1502)
valgrind[2595]: ==2595== by 0x40B258: run (networkd.c:82)
valgrind[2595]: ==2595== by 0x40B74A: main (networkd.c:117)
valgrind[2595]: ==2595==
valgrind[2595]: ==2595== HEAP SUMMARY:
valgrind[2595]: ==2595== in use at exit: 32,621 bytes in 201 blocks
valgrind[2595]: ==2595== total heap usage: 746 allocs, 545 frees, 241,027 bytes allocated
valgrind[2595]: ==2595==
valgrind[2595]: ==2595== LEAK SUMMARY:
valgrind[2595]: ==2595== definitely lost: 0 bytes in 0 blocks
valgrind[2595]: ==2595== indirectly lost: 0 bytes in 0 blocks
valgrind[2595]: ==2595== possibly lost: 0 bytes in 0 blocks
valgrind[2595]: ==2595== still reachable: 32,621 bytes in 201 blocks
valgrind[2595]: ==2595== suppressed: 0 bytes in 0 blocks
valgrind[2595]: ==2595== Reachable blocks (those to which a pointer was found) are not shown.
valgrind[2595]: ==2595== To see them, rerun with: --leak-check=full --show-leak-kinds=all
valgrind[2595]: ==2595==
valgrind[2595]: ==2595== For counts of detected and suppressed errors, rerun with: -v
valgrind[2595]: ==2595== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)
systemd-coredump[2600]: Process 2595 (memcheck-amd64-) of user 192 dumped core.
```
Gentoo's Portage package manager uses a PID namespace for process
isolation and cleanup. In this namespace, PID 1 has UID=250 (portage).
Bug: https://bugs.gentoo.org/674458
rescue.service pulls in /bin/plymouth, which doesn't exist on some
distributions (e.g. Arch Linux). Let's mark it as optional, as it's not
even required by the referencing unit and causes unwanted fails in the
integration testsuite.
This reverts commit e05c8b4462.
The key in question is labeled as "|\" in the US version, and e.g. "<>" in
European version. In the US version there are two keys with the same label
and they are both mapped to the same keycode. Let's revert the patch, to unbreak
the non-US users.
US users should apply some local work-around, possibly simply keeping the
contents of the patch as a file in hwdb.d/.
Fixes: #11499
Let's return -EAGAIN so that on state change, unit_process_job tries to
add our job to run_queue again so that all the reloads that coalesced
into the installed reload (which itself merged into a running one)
inititally atleast runs *once*. This should ensure service picks up all
config changes reliably.
See the issue being fixed for a detailed explanation.
Before adding this, I got errors about the library being missing such
as:
journalctl: error while loading shared libraries: libqrencode.so.4: cannot open shared object file: No such file or directory
Fixes#7367.
When we synthesize a "struct rlimit" structure to pass on for
RLIMIT_NOFILE to our children, let's explicitly make sure that the soft
limit is not above FD_SETSIZE, for compat reason with select().
Note this only applies when we derive the "struct rlimit" from what we
inherited. If the user configures something explicitly it always takes
precedence.
Fixes: #11305Fixes: #3260
Related: #11456
So, here's what happens in the described scenario in #11305. A unit goes
down, and that triggeres stop jobs for the other two units as they were
bound to it. Now, the timer for manager triggered restarts kicks in and
schedules a restart job with the JOB_FAIL job mode. This means there is
a stop job installed on those units, and now due to them being bound to
us they also get a restart job enqueued. This however is a conflicts, as
neither stop can merge into restart, nor restart into stop. However,
restart should be able to replace stop in any case. If the stop
procedure is ongoing, it can cancel the stop job, install itself, and
then after reaching dead finish and convert itself to a start job.
However, if we increase the timer, then it can always take those units
from inactive -> auto-restart.
We change the job mode to JOB_REPLACE so the restart job cancels the
stop job and installs itself.
Also, the original bug could be worked around by bumping RestartSec= to
avoid the conflicting.
This doesn't seem to be something that is going to break uses. That is
because for those who already had it working, there must have never been
conflicting jobs, as that would result in a desctructive transaction by
virtue of the job mode used.
After this change, the test case is able to work nicely without issues.
Instead of having just a single INITRD field, add support for all
additional parameters being INITRD fields in order.
Signed-off-by: Mike Auty <mike.auty@gmail.com>
@bl33pbl0p, please fix your editor
(Apparently you never configured the source tree? If you did, then the
git pre-commit hook would have been enabled which doesn't allow
commiting non-whitespace clean stuff...)
The script does not use any bash features.
On NixOS we have /bin/sh and /usr/bin/env for posix compatibility
but not /bin/bash as it is stored in our nix store.
With this change one can run the `meson configure` without patching
which greatly helps, when working on upstream contributions.
This doesn't really change much, but feels more correct to do, as it
ensures that all messages currently queued in the bus connections are
definitely unreffed and thus destryoing of the connection object will
follow immediately.
Strictly speaking this change is entirely unnecessary, since nothing
else could have acquired a ref to the connection and queued a message
in, however, now that we have the new sd_bus_close_unref() helper it
makes a lot of sense to use it here, to ensure that whatever happens
nothing that might have been queued fucks with us.
It's similar to sd_bus_flush_close_unref() but doesn't do the flushing.
This is useful since this will still discnnect the connection properly
but not synchronously wait for the peer to take our messages.
Primary usecase is within _cleanup_() expressions where synchronously
waiting on the peer is not OK.
Fixes#10659.
This changes the behaviour of parsing environment files to more closely
follow POSIX shell standards.
This has the effect that these variables defined in a file:
VAR1='\value'
VAR2="\value"
Are now interpreted as `\value` instead of interpreting the `\`
character and interpreting them as `value`.
For more information about the behaviour followed, see:
http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_02
This looks better and allows those terms to be indexed in systemd.directives.
In particular, <literal></literal> is dropped from around section names
([Match] and others) because the parens are distinctive enough on their own.
The same style is used in systemd.unit(5) and other pages that describe
sections.
Zbigniew Jędrzejewski-Szmek
Yu Watanabe
Mike Gilbert
Jonathon Kowalski
Topi Miettinen
Frantisek Sumsal
Louis Taylor
Lennart Poettering
Mike Auty
dcanuhe
Jörg Thalheim