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Corrupted empty files are relatively common. I think they are created
when a coredump for a user who never logged anything before is
attempted to be written, but the write does not succeed because the
coredump is too big, but there are probably other ways to create
those, especially if the machine crashes at the right time.
Non-corrupted empty files can also happen, e.g. if a journal file is
opened, but nothing is ever successfully written to it and it is
rotated because of MaxFileSec=. Either way, each "empty" journal file
costs around 3 MB, and there's little point in keeping them around.
Reporting of the free space was bogus, since the remaining space
was compared with the maximum allowed, instead of the current
use being compared with the maximum allowed. Simplify and fix
by reporting limits directly at the point where they are calculated.
Also, assign a UUID to the message.
Sometimes an entry is not successfully written, and we end up with
data items which are "unlinked", not connected to, and not used by any
entry. This will usually happen when we write to write a core dump,
and the initial small data fields are written successfully, but
the huge COREDUMP= field is not written. This situation is hard
to avoid, but the results are mostly harmless. Thus only warn about
unused data items.
Also, be more verbose about why journal files failed verification.
This should help diagnose journal failure modes without resorting
to a hexadecimal editor.
https://bugs.freedesktop.org/show_bug.cgi?id=65235 (esp. see
system.journal attached to the bug report).
Before we only checked the MESSAGE_ID and COREDUMP_UNIT.
Those are both user-controlled fields.
For COREDUMP_USER_UNIT, relax the rules a bit, and also
allow messages from _UID=0.
When journald encounters a message with OBJECT_PID= set
coming from a priviledged process (UID==0), additional fields
will be added to the message:
OBJECT_UID=,
OBJECT_GID=,
OBJECT_COMM=,
OBJECT_EXE=,
OBJECT_CMDLINE=,
OBJECT_AUDIT_SESSION=,
OBJECT_AUDIT_LOGINUID=,
OBJECT_SYSTEMD_CGROUP=,
OBJECT_SYSTEMD_SESSION=,
OBJECT_SYSTEMD_OWNER_UID=,
OBJECT_SYSTEMD_UNIT= or OBJECT_SYSTEMD_USER_UNIT=.
This is for other logging daemons, like setroubleshoot, to be able to
augment their logs with data about the process.
https://bugzilla.redhat.com/show_bug.cgi?id=951627
This complements existing functionality of setting variables
through 'systemctl set-environment', the kernel command line,
and through normal environment variables for systemd in session
mode.
- This changes all logind cgroup objects to use slice objects rather
than fixed croup locations.
- logind can now collect minimal information about running
VMs/containers. As fixed cgroup locations can no longer be used we
need an entity that keeps track of machine cgroups in whatever slice
they might be located. Since logind already keeps track of users,
sessions and seats this is a trivial addition.
- nspawn will now register with logind and pass various bits of metadata
along. A new option "--slice=" has been added to place the container
in a specific slice.
- loginctl gained commands to list, introspect and terminate machines.
- user.slice and machine.slice will now be pulled in by logind.service,
since only logind.service requires this slice.
Describe how to handle an AF_UNIX socket, with Accept set to false,
received from systemd, upon exit.
Signed-off-by: Łukasz Stelmach <l.stelmach@samsung.com>
In order to prepare for the kernel cgroup rework, let's introduce a new
unit type to systemd, the "slice". Slices can be arranged in a tree and
are useful to partition resources freely and hierarchally by the user.
Each service unit can now be assigned to one of these slices, and later
on login users and machines may too.
Slices translate pretty directly to the cgroup hierarchy, and the
various objects can be assigned to any of the slices in the tree.
Otherwise, when a network device is renamed, systemd-sysctl is run twice
with the same network device name: once for ACTION="add" and once for
ACTION="move".
The list and descriptions of valid transports was difficult to read, so
break the long sentence up into discrete man page list items to improve
readability.
Since the system journal wasn't open yet, available_space() returned 0.
Before:
systemd-journal[22170]: Allowing system journal files to grow to 4.0G.
systemd-journal[22170]: Journal size currently limited to 0B due to SystemKeepFree.
After:
systemd-journal[22178]: Allowing system journal files to grow to 4.0G.
systemd-journal[22178]: Journal size currently limited to 3.0G due to SystemKeepFree.
Also, when failing to write a message, show how much space was needed:
"Failed to write entry (26 items, 260123456 bytes) despite vacuuming, ignoring: ...".
