Given the write patterns on disk images, we better should turn COW off
for them. In particular as the file systems used inside the disk images
should do their own data integrity checks anyway and we don't need
multiple layers of it.
btrfs' COW logic results in heavily fragment journal files, which is
detrimental for perfomance. Hence, turn off COW for journal files as we
create them.
Turning off COW comes at the cost of data integrity guarantees, but this
should be acceptable, given that we do our own checksumming, and
generally have a pretty conservative write pattern.
Also see discussion on linux-btrfs:
http://www.spinics.net/lists/linux-btrfs/msg41001.html
So far, if we had no knowledge about the correct $TERM we defaulted to
v102, as a safe, conservative choice. However, the terminfo data for
vt102 is not aware of pageup/pagedown, which makes "less" much harder
work with than necessary. Setting vt220 allows them to work correctly.
"vt220" should be a sufficiently safe choice too, given that xterm,
gnome-terminal and the linux console all strive to implement vt220 as
baseline, already to pass pageup/pagedown correctly to apps.
Effectively, with this change "journalctl -e" run inside a
"systemd-nspawn" terminal will now run a pager where pageup/pagedown
works, which is quite an improvement of usability for containers.
The original loop called fix_order() on each service immediately after
loading it, but fix_order() would reference other units which were not
loaded yet.
This resulted in bogus and unnecessary orderings based on the static
start priorities.
Therefore call load_sysv() for every init script when traversing them in
enumerate_sysv(). This ensures that all units are loaded when
fix_order() is called.
Bug-Debian: https://bugs.debian.org/771118
The list of provided facility names as specified via Provides: in the
LSB header was originally implemented by adding those facilities to the
Names= property via unit_add_name().
In commit 95ed3294c6 the internal SysV
support was replaced by a generator and support for parsing the Names=
option had been removed from the unit file parsing in v186.
As a result, Provides: for non-virtual facility was dropped when
introducing the sysv-generator.
Since quite a few SysV init scripts still use that functionality (at
least in distros like Debian which have a large body of SysV init
scripts), add back support by making those facility names available via
symlinks to the unit filename to ensure correct orderings between
SysV init scripts which use those facility names.
Bug-Debian: https://bugs.debian.org/774335
Our write pattern is quite awful for CoW file systems (btrfs...), as we
keep updating file parts in the beginning of the file. This results in
fragmented journal files. Hence: when rotating files, defragment them,
since at that point we know that no further write accesses will be made.
This patch adds more detail to the description of how path escaping
operates and provides a pointer to the systemd-escape program. Either
would serve to answer the question raised in the bug report, so
hopefully this will allow it to be closed.
https://bugs.freedesktop.org/show_bug.cgi?id=87688
Making use of the fd storage capability of the previous commit, allow
restarting journald by serilizing stream state to /run, and pushing open
fds to PID 1.
With this change it is possible to send file descriptors to PID 1, via
sd_pid_notify_with_fds() which PID 1 will store individually for each
service, and pass via the usual fd passing logic on next invocation.
This is useful for enable daemon reload schemes where daemons serialize
their state to /run, push their fds into PID 1 and terminate, restoring
their state on next start from the data in /run and passed in from PID
1.
The fds are kept by PID 1 as long as no POLLHUP or POLLERR is seen on
them, and the service they belong to are either not dead or failed, or
have a job queued.
When systemd starts a service, it first opened /run/systemd/journal/stdout
socket, and only later switched to the right user.group (if they are
specified). Later on, journald looked at the credentials, and saw
root.root, because credentials are stored at the time the socket is
opened. As a result, all messages passed over _TRANSPORT=stdout were
logged with _UID=0, _GID=0.
Drop real uid and gid temporarily to fix the issue.
Lennart Poettering