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This is a different way to implement the fix proposed by commit
a4021390fef27f4136497328f suggested by Lennart Poettering.
In this patch we instruct PID1 to not kill "systemctl switch-root" command
started by initrd-switch-root service using the "argv[0][0]='@'" trick.
See: https://www.freedesktop.org/wiki/Software/systemd/RootStorageDaemons/ for
more details.
We had to backup argv[0] because argv is modified by dispatch_verb().
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networkd: allow networkd to start in early boot
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This patch handles the custom MTU field in IPv6 RA.
fixes RFE #4464
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calendarspec: add support for scheduling timers at the end of the month
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Fixes: #4721
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"*-*~1" => The last day of every month
"*-02~3..5" => The third, fourth, and fifth last days in February
"Mon 05~07/1" => The last Monday in May
Resolves #3861
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Stop looking for matches after MAX_YEAR so impossible dates like
"*-02-30" and "*-04-31" don't cause an infinite loop.
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If setting the received timezone or transient hostname fails because D-Bus is
not (yet) up, store the data in the Manager object and try again after
connecting to D-Bus.
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service: fix main processes exit behavior for type notify services
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config_parse_iec_size overwrites the next varible that is ARP.
Now the mtu is unsigned . Make it size_t .
Fixes #4644
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systemd-networkd runs as user "systemd-network" and thus is not privileged to
set the timezone acquired from DHCP:
systemd-networkd[4167]: test_eth42: Could not set timezone: Interactive authentication required.
Similarly to commit e8c0de912, add a polkit rule to grant
org.freedesktop.timedate1.set-timezone to the "systemd-network" system user.
Move the polkit rules from src/hostname/ to src/network/ to avoid too many
small distributed policy snippets (there might be more in the future), as it's
easier to specify the privileges for a particular subject in this case.
Add NetworkdClientTest.test_dhcp_timezone() test case to verify this (for
all people except those in Pacific/Honolulu, there the test doesn't prove
anything -- sorry ☺ ).
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Hostname and time zone are global settings, not link specific. Move these
methods from Link into Manager.
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Various networkd/DHCP fixes.
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Before this commit, when the main process of a Type=notify service exits the
service would enter a running state without passing through the startup post
state. This meant ExecStartPost= from being executed and allowed follow-up
units to start too early (before the ready notification).
Additionally, when RemainAfterExit=yes is used on a Type=notify service, the
exit status of the main process would be disregarded.
After this commit, an unsuccessful exit of the main process of a Type=notify
service puts the unit in a failed state. A successful exit is inconsequential
in case RemainAfterExit=yes. Otherwise, when no ready notification has been
received, the unit is put in a failed state because it has never been active.
When all processes in the cgroup of a Type=notify service are gone and no ready
notification has been received yet, the unit is also put in a failed state.
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Introduce a SERVICE_FAILURE_PROTOCOL error type for when a service does
not follow the protocol.
This error type is used when a pid file is expected, but not delivered.
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Fixes: #4711
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Given that other file systems (notably: xfs) support reflinks these days, let's
extend the file system snapshotting logic to fall back to plan copies or
reflinks when full btrfs subvolume snapshots are not available.
This essentially makes "systemd-nspawn --ephemeral" and "systemd-nspawn
--template=" available on non-btrfs subvolumes. Of course, both operations will
still be slower on non-btrfs than on btrfs (simply because reflinking each file
individually in a directory tree is still slower than doing this in one step
for a whole subvolume), but it's probably good enough for many cases, and we
should provide the users with the tools, they have to figure out what's good
for them.
Note that "machinectl clone" already had a fallback like this in place, this
patch generalizes this, and adds similar support to our other cases.
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When mountint a loopback image, we need a temporary root directory we can mount
stuff to. Make sure to actually remove it when exiting, so that we don't leave
stuff around in /tmp unnecessarily.
See: #4664
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Let's make the shutdown logic synchronous, so that there's a better chance to
detach the loopback device after use.
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This adds a new undocumented env var $SYSTEMD_NSPAWN_LOCK. When set to "0",
nspawn will not attempt to lock the image.
Fixes: #4037
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on success
We forgot to initialize the "global" return parameter in one case. Fix that.
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Previously --ephemeral was only supported with container trees in btrfs
subvolumes (i.e. in combination with --directory=). This adds support for
--ephemeral in conjunction with disk images (i.e. --image=) too.
As side effect this fixes that --ephemeral was accepted but ignored when using
-M on a container that turned out to be an image.
Fixes: #4664
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@filesystem groups various file system operations, such as opening files and
directories for read/write and stat()ing them, plus renaming, deleting,
symlinking, hardlinking.
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To properly store priority in passed in pointer and return 0 for success.
Also add a test for verifying that it works correctly.
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This changes the return value a bit: 1 will be returned if the value is
changed. But the return value was not documented, and the change should
be for the good anyway. Current callers don't care.
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if we receive a bogus lease with a DNS/NTP server within local scope let's
politely ignore.
Fixes: #4524
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Never propagate DNS/NTP servers on the local link via the DHCP server. The
DNS/NTP servers 0.0.0.0 and 127.0.0.1 only make sense in the local context,
hence never propagate them automatically to other hosts.
Fixes: #4524
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link_push_uplink_dns_to_dhcp_server()
Let's clarify that this is only relevant for pushing uplink DNS config data,
not in any other context.
(Same for NTP)
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DNS servers must be specified as IP addresses, hence let's store them as that
internally, so that they are guaranteed to be fully normalized always, and
invalid data cannot be stored.
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Let's make the loops around extract_first_word() be more alike.
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Let's reorder them a bit, so that stuff that belongs together semantically is
placed together (in particular, move the various DHCP "use" booleans together).
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Let's be a bit stricter, and make sure users only configure proper DNS names or
IP addresses, but not any other strings.
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This way, we can use it for validating IP address strings.
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This adds in4_addr_is_localhost() and in4_addr_is_link_local() that only take
an IPv4 "struct in_addr", to match in_addr_is_localhost() and
in_addr_is_link_local() that that a "union in_addr_union".
This matches the existing in4_addr_is_null() call that already exists.
For IPv6 glibc already exports a set of macros, hence we don't add similar
functions in6_addr_is_localhost(). We also drop in6_addr_is_null() as
IN6_IS_ADDR_UNSPECIFIED() already provides that.
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Let's split out the code into its own little function and let's use
gethostname_strict() which already filters out localhost for us.
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Let's handle NULL hostnames (for unsetting it) before we validate the name.
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hostnamed: allow networkd to set the transient hostname
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Test suite fixes
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systemd-networkd runs as user "systemd-network" and thus is not privileged to
set the transient hostname:
systemd-networkd[516]: ens3: Could not set hostname: Interactive authentication required.
Standard polkit *.policy files do not have a syntax for granting privileges to
a user, so ship a pklocalauthority (for polkit < 106) and a JavaScript rules
file (for polkit >= 106) that grants the "systemd-network" system user that
privilege.
Add DnsmasqClientTest.test_transient_hostname() test to networkd-test.py to
cover this. Make do_test() a bit more flexible by interpreting "coldplug==None"
as "test sets up the interface by itself". Change DnsmasqClientTest to set up
test_eth42 with a fixed MAC address so that we can configure dnsmasq to send a
special host name for that.
Fixes #4646
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nspawn: R/W support for /sysfs, /proc, and /proc/sys/net
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Confirm spawn fixes/enhancements
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This commit adds the possibility to leave /sys, and /proc/sys read-write.
It introduces a new (undocumented) env var SYSTEMD_NSPAWN_API_VFS_WRITABLE
to enable this feature.
If set to "yes", /sys, and /proc/sys will be read-write.
If set to "no", /sys, and /proc/sys will be read-only.
If set to "network" /proc/sys/net will be read-write. This is useful in
use-cases, where systemd-nspawn is used in an external network
namespace.
This adds the possibility to start privileged containers which need more
control over settings in the /proc, and /sys filesystem.
This is also a follow-up on the discussion from
https://github.com/systemd/systemd/pull/4018#r76971862 where an
introduction of a simple env var to enable R/W support for those
directories was already discussed.
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==30496== Conditional jump or move depends on uninitialised value(s)
==30496== at 0x489F654: memcmp (vg_replace_strmem.c:1091)
==30496== by 0x49BF203: getenv_for_pid (process-util.c:678)
==30496== by 0x4993ACB: detect_container (virt.c:442)
==30496== by 0x182DFF: test_get_process_comm (test-process-util.c:98)
==30496== by 0x185847: main (test-process-util.c:368)
==30496==
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rework service namespace handling a bit
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free_and_replace sets the setcond argument to NULL (it's designed
to be used with _clenaup_ macros), and we don't want that here.
Fixes #4684.
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For some reasons units remaining in the same process group as PID 1
(same_pgrp=true) fail to acquire the console even if it's not taken by anyone.
So always accept for units with same_pgrp set for now.
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