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This should be enough to fix https://bugzilla.redhat.com/show_bug.cgi?id=1856514.
But the limit should be significantly higher than 10% anyway. By setting a
limit on /tmp at 10% we'll break many reasonable use cases, even though the
machine would deal fine with a much larger fraction devoted to /tmp.
(In the first version of this patch I made it 25% with the comment that
"Even 25% might be too low.". The kernel default is 50%, and we have been using
that seemingly without trouble since https://fedoraproject.org/wiki/Features/tmp-on-tmpfs.
So let's just make it 50% again.)
See 7d85383edb.
(Another consideration is that we learned from from the whole initiative with
zram in Fedora that a reasonable size for zram is 0.5-1.5 of RAM, and that pretty
much all systems benefit from having zram or zswap enabled. Thus it is reasonable
to assume that it'll become widely used. Taking the usual compression effectiveness
of 0.2 into account, machines have effective memory available of between
1.0 - 0.2*0.5 + 0.5 = 1.4 (for zram sized to 0.5 of RAM) and
1.0 - 0.2*1.5 + 1.5 = 2.2 (for zram 1.5 sized to 1.5 of RAM) times RAM size.
This means that the 10% was really like 7-4% of effective memory.)
A comment is added to mount-util.h to clarify that tmp.mount is separate.
Previously, we assumed that success meant we definitely got a valid
pointer. There is at least one edge case where this is not true (i.e.,
we can get both a 0 return value, and *also* a NULL pointer):
4246bb550d/libselinux/src/procattr.c (L175)
When this case occurrs, if we don't check the pointer we SIGSEGV in
early initialization.
Let's find the right os-release file on the host side, and only mount
the one that matters, i.e. /etc/os-release if it exists and
/usr/lib/os-release otherwise. Use the fixed path /run/host/os-release
for that.
Let's also mount /run/host as a bind mount on itself before we set up
/run/host, and let's mount it MS_RDONLY after we are done, so that it
remains immutable as a whole.
It needs to be world readable (unlike /etc/shadow) when created anew.
This fixes systems that boot with "systemd-nspawn --volatile=yes", i.e.
come up with an entirely empty /etc/ and thus no existing /etc/passwd
file when firstboot runs.
We want our OS trees to be MS_SHARED by default, so that our service
namespacing logic can work correctly. Thus in nspawn we mount everything
MS_SHARED when organizing our tree. We do this early on, before changing
the user namespace (if that's requested). However CLONE_NEWUSER actually
resets MS_SHARED to MS_SLAVE for all mounts (so that less privileged
environments can't affect the more privileged ones). Hence, when
invoking it we have to reset things to MS_SHARED afterwards again. This
won't reestablish propagation, but it will make sure we get a new set of
mount peer groups everywhere that then are honoured for the mount
namespaces/propagated mounts set up inside the container further down.
[zjs: Looking at https://packages.ubuntu.com/bionic/iptables-dev, iptables-dev
was a transitional package that was pulling in libxtables-dev, libip4tc-dev,
and libip6tc-dev (as listed by @GiedriusS). iptables-dev is gone in focal, so
replace it by the expanded list.]
This API is a complete mess. We forgot to do a hashed comparison for duplicate
entries and we use a direct pointer comparison. For trivial_hash_ops the result
is the same. For all other case, it's not. Fixing this properly will require
auditing all the uses of set_put() and ordered_set_put(). For now, let's just
acknowledge the breakage.
Currently, each change to NEWS triggers a meson reconfigure that
changes SOURCE_EPOCH which causes a full rebuild. Since NEWS changes
relatively often, we have a full rebuild each time we pull from
master even if we pull semi-regularly. This is further compounded
when using branches since NEWS has a relatively high chance to
differ between branches which causes git to update the modification
time, leading to a full rebuild when switching between branches.
We fix this by using the creation time of the latest git tag instead.
There are a lot of edge cases that the current implementation
doesn't handle, especially in cases where one of passwd/shadow
exists and the other doesn't exist. For example, if
--root-password is specified, we will write /etc/shadow but
won't add a root entry to /etc/passwd if there is none.
To fix some of these issues, we constrain systemd-firstboot to
only modify /etc/passwd and /etc/shadow if both do not exist
already (or --force) is specified. On top of that, we calculate
all necessary information for both passwd and shadow upfront so
we can take it all into account when writing the actual files.
If no root password options are given --force is specified or both
files do not exist, we lock the root account for security purposes.
Fixes#16401.
c80a9a33d0 introduced the .can_fail field,
but didn't set it on .targets. Targets can fail through dependencies.
This leaves .slice and .device units as the types that cannot fail.
$ systemctl cat bad.service bad.target bad-fallback.service
[Service]
Type=oneshot
ExecStart=false
[Unit]
OnFailure=bad-fallback.service
[Service]
Type=oneshot
ExecStart=echo Fixing everythign!
$ sudo systemctl start bad.target
systemd[1]: Starting bad.service...
systemd[1]: bad.service: Main process exited, code=exited, status=1/FAILURE
systemd[1]: bad.service: Failed with result 'exit-code'.
systemd[1]: Failed to start bad.service.
systemd[1]: Dependency failed for bad.target.
systemd[1]: bad.target: Job bad.target/start failed with result 'dependency'.
systemd[1]: bad.target: Triggering OnFailure= dependencies.
systemd[1]: Starting bad-fallback.service...
echo[46901]: Fixing everythign!
systemd[1]: bad-fallback.service: Succeeded.
systemd[1]: Finished bad-fallback.service.
This reverts commit c7220ca802.
The removal was done as a reaction to the messages from systemd:
initrd-root-fs.target: Requested dependency OnFailure=emergency.target ignored (target units cannot fail).
initrd.target: Requested dependency OnFailure=emergency.target ignored (target units cannot fail).
initrd-root-device.target: Requested dependency OnFailure=emergency.target ignored (target units cannot fail).
initrd-fs.target: Requested dependency OnFailure=emergency.target ignored (target units cannot fail).
local-fs.target: Requested dependency OnFailure=emergency.target ignored (target units cannot fail).
...
But it seems that the messages themselves are wrong, and the units were OK.
The Address objects in the set generated by ndisc_router_generate_addresses()
have the equivalent prefixlen, flags, prefered lifetime.
This commit makes ndisc_router_generate_addresses() return Set of
in6_addr.
The CI occasionally fail in test-path with a timeout. test-path loads
units from the filesystem, and this conceivably might take more than
the default limit of 3 s. Increase the timeout substantially to see if
this helps.
