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networkd: Drop IPv6LL address when link is down.
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Implement compat translation between IO* and BlockIO* settings
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minor improvements for dealing with MAC Addresses
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free_and_strdup handles NULL but not empty strings.
See also:
https://github.com/systemd/systemd/pull/3283#issuecomment-220603145
https://github.com/systemd/systemd/pull/3307
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The original conflict is fixed in the kernel in v4.6-rc7-40-g4a91cb61bb,
but now our work-around causes a compilation failure.
Keep the workaround to support 4.5 kernels for now, and layer
more ugliness on top.
Tested with:
kernel-headers-4.6.0-1.fc25.x86_64
glibc-devel-2.23.90-18.fc25.x86_64
kernel-headers-4.5.4-300.fc24.x86_64
glibc-devel-2.23.1-7.fc24.x86_64
kernel-headers-4.4.9-300.fc23.x86_64
glibc-devel-2.22-16.fc23.x86_64
kernel-headers-4.1.13-100.fc21.x86_64
glibc-devel-2.20-8.fc21.x86_64
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After a few link up/down events I got this warning:
May 17 22:05:10 laptop systemd-resolved[2983]: Failed to read DNS servers for interface wlp3s0, ignoring: Argument list too long
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Adds support to core for systemd D-Bus clients to send the
`SELinuxContext` property . This means `systemd-run -p
SELinuxContext=foo` should now work.
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rm_rf_physical_and_freep in tests (#3292)
Some distros don't mount /tmp as tmpfs.
For example:
https://lists.ubuntu.com/archives/ubuntu-cloud/2016-January/001009.html
Some tests:
* print 'Attempted to remove disk file system, and we can't allow that.'
* don't really cleanup /tmp
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https://bugzilla.redhat.com/show_bug.cgi?id=1336960
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After enabling/disabling a unit, the daemon configuration is expected
to be unless '--no-reload' option is passed.
However this is not done when enabling a sysv units. This can lead to
the following scenario:
$ cp /etc/init.d/named /etc/init.d/foo
$ systemctl enable foo
foo.service is not a native service, redirecting to systemd-sysv-install
Executing /usr/lib/systemd/systemd-sysv-install enable foo
$ systemctl start foo
Failed to start foo.service: Unit foo.service failed to load: No such file or directory.
This can also be seen after installing a package providing a sysv
service: the service can't be started unless 'daemon-reload' is called
manually. This shouldn't be needed and this patch will fix this case
too since during package installation, the service is expected to be
enabled/disabled.
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The sync() call on shutdown had been removed with commit 57371e5829a61e5ee6c9f98404dfc729d6c62608
together with the no-sync option for the shutdown commands.
The sync call was restored in commit 4a3ad39957399c4a30fc472a804e72907ecaa4f9 but the no-sync option
wasn't re-added.
I think we should restore this option at least for the legacy halt command.
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rules: add /dev/disk/by-partuuid symlinks also for dos partition tables
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blkid reports PARTUUID values also for partitions that are defined by a
dos partitioning scheme. Instead of limiting the partitioning scheme to
"gpt or dos" just drop the test for the partitioning scheme and trust
blkid to do the right thing.
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... logind SIGHUP support, sd_journal_open_{directory,files}_fd,
specifiers in DeviceAllow, "generated" and "trasnient" unit types.
Move removed features to the end and cluster features by type.
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free_and_strdup already handles the NULL case for us, so we can remove
an extraneous conditional check.
As noted in https://github.com/systemd/systemd/pull/3279/files#r63687717
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Due to the substantial interface changes in cgroup unified hierarchy, new IO
settings are introduced. Currently, IO settings apply only to unified
hierarchy and BlockIO to legacy. While the transition is necessary, it's
painful for users to have to provide configs for both. This patch implements
translation from one config set to another for configs which make sense.
* The translation takes place during application of the configs. Users won't
see IO or BlockIO settings appearing without being explicitly created.
* The translation takes place only if there is no config for the matching
cgroup hierarchy type at all.
While this doesn't provide comprehensive compatibility, it should considerably
ease transition to the new IO settings which are a superset of BlockIO
settings.
v2:
- Update test-cgroup-mask.c so that it accounts for the fact that
CGROUP_MASK_IO and CGROUP_MASK_BLKIO move together. Also, test/parent.slice
now sets IOWeight instead of BlockIOWeight.
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Factor out the following functions out of cgroup_context_apply()
* cgroup_context_[blk]io_weight()
* cgroup_apply_[blk]io_device_weight()
* cgroup_apply_[blk]io_device_limit()
This is pure refactoring and shouldn't cause any functional differences.
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CGroupBlockIODeviceBandwith is used to keep track of IO bandwidth limits for
legacy cgroup hierarchies. Unlike the unified hierarchy counterpart
CGroupIODeviceLimit, a CGroupBlockIODeviceBandwiddth records either a read or
write limit and has a couple issues.
* There's no way to clear specific config entry.
* When configs are cleared for an IO direction of a unit, the kernel settings
aren't cleared accordingly creating discrepancies.
This patch updates CGroupBlockIODeviceBandwidth so that it behaves similarly to
CGroupIODeviceLimit - each entry records both rbps and wbps limits and is
cleared if both are at default values after kernel settings are updated.
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cgroup IO controller supports maximum limits for both bandwidth and IOPS but
systemd resource control currently only supports bandwidth limits. This patch
adds support for IOReadIOPSMax and IOWriteIOPSMax when unified cgroup hierarchy
is in use.
It isn't difficult to also add BlockIOReadIOPS and BlockIOWriteIOPS for legacy
hierarchies but IO control on legacy hierarchies is half-broken anyway, so
let's leave it alone for now.
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Currently, there are two cgroup IO limits, bandwidth max for read and write,
and they are hard-coded in various places. This is fine for two limits but IO
is expected to grow more limits - low, high and max limits for bandwidth and
IOPS - and hard-coding each limit won't make sense.
This patch replaces hard-coded limits with an array indexed by
CGroupIOLimitType and accompanying string and default value tables so that new
limits can be added trivially.
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Now we are not dropping the IPv6LL address when link is down.
So next time when link is up and before kernel acquired this address
we are using the old address.
When the link is down kernel tells us that this address is no longer
valid . Let's remove this address and again when kernel tells us
that the address is added let's use it.
fixes #3264
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This is partial fix for #2228 and #2977, #3204.
bridge-test: netdev ready
docker0: Gained IPv6LL
wlan0: Gained IPv6LL
eth0: Gained IPv6LL
Enumeration completed
bridge-test: netdev exists, using existing without changing its
parameters
vboxnet0: IPv6 enabled for interface: Success
lo: Configured
docker0: Could not drop address: No such process
vboxnet0: Gained carrier
wlan0: Could not drop address: No such process
eth0: Could not drop address: No such process
eth0: Could not drop address: No such process
eth0: Could not drop address: No such process
vboxnet0: Gained IPv6LL
vboxnet0: Could not set NDisc route or address: Invalid argument
vboxnet0: Failed
[New Thread 0x7ffff6505700 (LWP 1111)]
[Thread 0x7ffff6505700 (LWP 1111) exited]
Assertion 'link->state == LINK_STATE_SETTING_ROUTES' failed at
src/network/networkd-link.c:672, function link_enter_configured().
Aborting.
Program received signal SIGABRT, Aborted.
0x00007ffff6dc6a98 in raise () from /lib64/libc.so.6
Missing separate debuginfos, use: dnf debuginfo-install
iptables-1.4.21-15.fc23.x86_64 libattr-2.4.47-14.fc23.x86_64
libidn-1.32-1.fc23.x86_64 pcre-8.38-7.fc23.x86_64
Debugging
(gdb) bt
"link->state == LINK_STATE_SETTING_ROUTES", file=0x5555556a34c8
"src/network/networkd-link.c", line=672,
func=0x5555556a56d0 <__PRETTY_FUNCTION__.14850>
"link_enter_configured") at src/basic/log.c:788
src/network/networkd-link.c:672
src/network/networkd-link.c:720
flags=0 '\000', scope=0 '\000', cinfo=0x7fffffffe020) at
src/network/networkd-address.c:344
(rtnl=0x5555556eded0, message=0x55555570ff20, userdata=0x5555556ec590)
at src/network/networkd-manager.c:604
m=0x55555570ff20) at src/libsystemd/sd-netlink/sd-netlink.c:365
at src/libsystemd/sd-netlink/sd-netlink.c:395
ret=0x0) at src/libsystemd/sd-netlink/sd-netlink.c:429
revents=1, userdata=0x5555556eded0) at
src/libsystemd/sd-netlink/sd-netlink.c:723
src/libsystemd/sd-event/sd-event.c:2268
src/libsystemd/sd-event/sd-event.c:2629
timeout=18446744073709551615) at src/libsystemd/sd-event/sd-event.c:2688
bus=0x5555556eeba0, name=0x55555568a2f5 "org.freedesktop.network1",
timeout=30000000,
check_idle=0x55555556adb6 <manager_check_idle>,
userdata=0x5555556ec590) at src/shared/bus-util.c:134
src/network/networkd-manager.c:1130
src/network/networkd.c:127
(gdb) f 3
src/network/networkd-link.c:672
672 assert(link->state == LINK_STATE_SETTING_ROUTES);
(gdb) p link->state
$1 = LINK_STATE_FAILED
We should not be in this state .
even if vboxnet0 failed we went into this state.
vboxnet0: Could not set NDisc route or address: Invalid argument
vboxnet0: Failed
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Fix for #3232.
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Add an option to disable appending DHCP option 3 (Router) to the DHCP
OFFER and ACK packets.
This commit adds the boolean option EmitRouter= for the [DHCPServer]
section in .network files.
Rationale: On embedded devices, it is very useful to have a DHCP server
running on an USB OTG ethernet gadget interface to avoid manual setup on
the client PCs, but it should only serve IP addresses, no route(r)s.
Otherwise, Windows clients experience network connectivity issues, due
to them using the address set in DHCP option 3 as default gateway.
Signed-off-by: Clemens Gruber <clemens.gruber@pqgruber.com>
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Makes it consistent with the other branches here.
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This isn't quite symmetrical to in_addr_from_string() because it also returns
an offset indicating how much of the string was consumed by the matched
pattern. This offset reporting is needed for either of the following use
cases:
* verifying the lack of trailing garbage after such an address
* parsing subsequent data from the same string
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define HEXDIGITS alongside DIGITS, and use it where it's already useful. We'll
use it again shortly when parsing MAC addresses.
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networkd currently silently accepts some strings as MAC addresses that it
probably shouldn't (like "ab:cd:ef:12:34:56:78" and "ab:cd:ef:12:3 4:56").
Add tests to MAC address parsing to ensure that we only accept valid MAC
addresses, and that we accept the three most common forms of MAC address
(colon-delimited hex, IEEE, and Cisco)
Several of these tests currently fail, but another commit in this series will
resolve them.
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Improve the networkd documentation to clarify that Match.MACAddress is for
selection, but Link.MACAddress describes an action to be taken.
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Small networkd cleanup
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BlockIOXyz= to the legacy hierarchy
With this change for each setting we say which hierarachy it applies to briefly
in the first sentence of the description, plus in longer form in an extra
pargraph at the end, with a recommendation for the counterpart of the option in
the other hierarchy.
Also adds markup and the "=" suffix to all mentioned settings.
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core: add io controller support on the unified hierarchy
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We currently generate log message about unit being started even when
unit was started already and job didn't do anything. This is because job
was requested explicitly and hence became anchor job of the transaction
thus we could not eliminate it. That is fine but, let's not pollute
journal with useless log messages.
$ systemctl start systemd-resolved
$ systemctl start systemd-resolved
$ systemctl start systemd-resolved
Current state:
$ journalctl -u systemd-resolved | grep Started
May 05 15:31:42 rawhide systemd[1]: Started Network Name Resolution.
May 05 15:31:59 rawhide systemd[1]: Started Network Name Resolution.
May 05 15:32:01 rawhide systemd[1]: Started Network Name Resolution.
After patch applied:
$ journalctl -u systemd-resolved | grep Started
May 05 16:42:12 rawhide systemd[1]: Started Network Name Resolution.
Fixes #1723
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More friendly to the stack.
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https://bugs.freedesktop.org/show_bug.cgi?id=95231
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Private /dev will not be managed by udev or others, so we can make it
noexec and readonly after we have made all device nodes. As /dev/shm
needs to be writable, we can't use bind_remount_recursive().
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