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CID #1237559.
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They both point to the same location, but the reader
is not forced to look back to the beginning of the function
to see that.
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In reference to CID #1238956.
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It certainly is everywhere on Linux, but as a courtesy
to people doing some strange cross-compilation, check
that the assumption holds.
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CID #1271353.
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add_mount() is OK with unknow file type, but we have to initalize
the variable to NULL not to pass garbage on error.
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CID #1287141.
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CID #1287142.
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Instead introduce ensure_usec_initialized(), which copies the timestamp if possible otherwise
sets it to now(CLOCK_MONOTONIC).
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Do not rely on nl_pid == 0, but check the groups instead. We currently avoid using
nl_pid == 0 for unicast anyway, so this should be redundant, but let's try to be
correct.
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In the unlikely event that we wrap the counter, skip 0 as this is used
for broadcasts.
Suggested by Richard Maw.
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Replace ENOTSUP by EOPNOTSUPP as this is what linux actually uses.
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The error code is called EDEADLK, stop using legacy names like EDEADLOCK.
Note that _some_ weird architectures define them differently (namely, mips
and sparc), but on all sane architectures they're exactly the same. So
stay with the widely used code, which is EDEADLK.
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There is no reason to ever use EWOULDBLOCK. It's equivalent to EAGAIN on
all architectures on linux.
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EWOULDBLOCK is the same as EAGAIN, stop using it.
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https://bugs.freedesktop.org/show_bug.cgi?id=89226
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none/both/v4/v6 are deprecated in favour of no/yes/ipv4/ipv6.
https://bugs.freedesktop.org/show_bug.cgi?id=89221
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https://bugs.freedesktop.org/show_bug.cgi?id=89559
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journal-remote buffers input, and then parses it handling one journal entry at a time.
It was possible for useful data to be left in the buffer after some entries were
processesed. But all data would be already read from the fd, so there would be
no reason for the event loop to call the handler again. After some new data came in,
the handler would be called again, and would then process the "old" data in the buffer.
Fix this by enabling a handler wherever we process input data and do not exhaust data
from the input buffer (i.e. when EAGAIN was not encountered). The handler runs until
we encounter EAGAIN.
Looping over the input data is done in this roundabout way to allow the event loop
to dispatch other events in the meanwhile. If the loop was inside the handler, a
source which produced data fast enough could completely monopolize the process.
https://bugs.freedesktop.org/show_bug.cgi?id=89516
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This matches similar code elsewhere.
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https://bugs.freedesktop.org/show_bug.cgi?id=89486
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"Notifications are of informal nature and no reply is expected, therefore the
sequence number is typically set to 0."[1]
If networkd is started soon after recent netlink activity, then there
will be messages with sequence number 0 in the buffer.
The first thing networkd does is to request a dump of all the links. If
it uses sequence number 0 for this, then it may confuse the dump request's
response with that of a notification.
This will result in it failing to properly enumerate all the links,
but more importantly, when it comes to enumerate all the addresses, it
will still have the link dump in progress, so the address enumeration
will fail with -EBUSY.
[1]: http://www.infradead.org/~tgr/libnl/doc/core.html#core_msg_types
[tomegun: sequence -> serial]
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Newly added kernel drivers repeatedly pass our blacklist and
cause trouble for the devices, because they do not expect to
be examined by udev's default rules which include blkid.
This turns the blacklist into a whitelist. Device type which
need support for additional symlinks need to be added to the
whitelist now.
Note, that the by-id, by-path symlinks are only intended for
hotpluggable devices. There is no reason for exotic, or for
statically configured devices to provide them.
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Explicitly put the "multiple EnvironmentFile=" description into its own
paragraph to make it much easier to find.
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The information in the db is stale, so it does not make sense to
expose it any longer. Also, don't drop the kernel event, but simply
pass it on to userspace without ammending it.
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This will allow us to clean up the device when we are notified about the worker being killed.
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This allows us to move the db reading from udevd to libudev.
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Return -errno rather than -1 in case sendmsg() fails.
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We were explicitly eagerly loading the db, then deletenig the backing file and then processing the
rules/symlinks. Instead we delete the backnig db file as the last step and let the db loading be
lazy as everywhere else.
This may save us a bit of work in casese where the db is not needed, but more importantly it hides
some implementation details of libudev-device form udevd.
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To copy properties from one device to another. Drop the equivalent functionality from udevd.
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systemd-cgtop --dept=1 -b -n 10 -d 0.1 | cat
Assertion 'new_length >= 3' failed at src/shared/util.c:3 \
595, function ellipsize_mem(). Aborting.
Aborted (core dumped)
(David: add comment)
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On kdbus, we get cgroups-agent messages via the system bus, not the
private systemd socket. Therefore, we must install the match properly or
we will never receive cgroup notifications.
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Forwarding messages that are not rewinded will drop data. Fix this for
cgroups-agent messages that we might remarshal before forwarding to the
system bus.
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If we receive an sd_bus_message from the kernel, m->kdbus will contain
additional items that cannot be used when sending a message. Therefore,
always remarshal the message if it is used again.
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