IF YOU WOULD LIKE TO GET AN ACCOUNT, please write an
email to Administrator. User accounts are meant only to access repo
and report issues and/or generate pull requests.
This is a purpose-specific Git hosting for
BaseALT
projects. Thank you for your understanding!
Только зарегистрированные пользователи имеют доступ к сервису!
Для получения аккаунта, обратитесь к администратору.
_c is misleading because .h files should be included in those lists too
(this tells meson that the build outputs should be rebuilt if the header
files change).
Follow-up for 1437822638.
Fixes#10526.
Even if we waited for the root device to appear, the mount could still fail if
we didn't wait for udev to initalize the device. In particular, the
/dev/block/n:m path used to mount the device is created by udev, and nspawn
would sometimes win the race and the mount would fail with -ENOENT.
The same wait is done for partitions, since if we try to mount them, the same
considerations apply.
Note: I first implemented a version which just does a loop (with a short wait).
In that approach, udev takes on average ~800 µs to initialize the loopback
device. The approach where we set up a monitor and avoid the loop is a bit
nicer. There doesn't seem to be a significant difference in speed.
With 1000 invocations of 'systemd-nspawn -i image.squashfs echo':
loop (previous approach):
real 4m52.625s
user 0m37.094s
sys 2m14.705s
monitor (this patch):
real 4m50.791s
user 0m36.619s
sys 2m14.039s
dissect-image would wait for the root device and paritions to appear. But if we
had an image with no partitions, we'd not wait at all. If the kernel or udev
were slow in creating device nodes or symlinks, subsequent mount attempt might
fail if nspawn won the race.
Calling wait_for_partitions_to_appear() in case of no partitions means that we
verify that the kernel agrees that there are no partitions. We verify that the
kernel sees the same number of partitions as blkid, so let's that also in this
case.
This makes the failure in #10526 much less likely, but doesn't eliminate it
completely. Stay tuned.
The function interface is the same, except that the output pointer may be NULL.
The implementation is slightly simplified by taking advantage of changes in
ancestor commit 'sd-device: attempt to read db again if it wasn't found', by
not creating a new sd_device object before re-checking the is_initialized
status.
v2:
- In v1, the old object was always used and the device received back from the
sd_device_monitor_start callback was ignored. I *think* the result will be
equivalent in both cases, because by the time we the callback gets called,
the db entry in the filesystem will also exist, and any subsequent access to
properties of the object would trigger a read of the database from disk. But
I'm not certain, and anyway, using the device object received in the callback
seems cleaner.
Normally, we don't care too much about what pahole reports. But this structure
could potentially be allocated for every device on the system, i.e. in a large
number of copies. 5 vs 7 cache lines is nice.
/* size: 400, cachelines: 7, members: 53 */
/* sum members: 330, holes: 12, sum holes: 70 */
/* last cacheline: 16 bytes */
/* size: 320, cachelines: 5, members: 53 */
/* bit holes: 1, sum bit holes: 6 bits */
/* bit_padding: 5 bits */
We had two very similar functions: device_read_db_aux and device_read_db,
and a number of wrappers for them:
device_read_db_aux
← device_read_db (in sd-device.c)
← all functions in sd-device.c, including sd_device_is_initialized
← device_read_db_force
← event_execute_rules_on_remove (in udev-event.c)
device_read_db (in device-private.c)
← functions in device_private.c (but not device_read_db_force):
device_get_devnode_{mode,uid,gid}
device_get_devlink_priority
device_get_watch_handle
device_clone_with_db
← called from udevadm, udev-{node,event,watch}.c
Before 7141e4f62c (sd-device: don't retry loading
uevent/db files more than once), the two implementations were the same. In that
commit, device_read_db_aux was changed. Those changes were reverted in the parent
commit, so the two implementations are now again the same except for superficial
differences. This commit removes device_read_db (in sd-device.c), and renames
device_read_db_aux to device_read_db_internal and makes everyone use this one
implementation. There should be no functional change.
This mostly reverts "sd-device: don't retry loading uevent/db files more than
once", 7141e4f62c. We will retry if we couldn't
access the file, but not if parsing failed.
Not re-reading the database at all just doesn't seem like a good idea. We have
two implementations of device_read_db, and one does that, and the other retries
to read the db. Re-reading seems more useful, since we can create the object
and then access properties as some later time when we know that the device has
been initialized and we can get useful results. Otherwise, we force the user to
destroy this object and create a new one.
This changes device_read_uevent_file() and device_read_db_aux(). See next
commit for description of where those functions are used.
If the terminal is in graphical mode, the kernel will refuse to copy the fonts
and will return -EINVAL.
Also having the graphical mode in effect probably indicates that the terminal
is in used by another application and we shouldn't interfer in such cases.
RFC7766 section 4 states that in the absence of EDNS0, a response that
is too large for a 512-byte UDP packet will have the 'truncated' bit
set. The client is expected to retry the query over TCP.
Fixes#10264.
The parent slice is always filtered ahead of time from UNIT_BEFORE, so
checking if the current member is the same as the parent unit will never
pass.
I may also write a SLICE_FOREACH_CHILD macro to remove some more of the
parent slice checks, but this requires a bit of a rework and general
refactoring and may not be worth it, so let's just do this for now.
fdopen doesn't accept "e", it's ignored. Let's not mislead people into
believing that it actually sets O_CLOEXEC.
From `man 3 fdopen`:
> e (since glibc 2.7):
> Open the file with the O_CLOEXEC flag. See open(2) for more information. This flag is ignored for fdopen()
As mentioned by @jlebon in #11131.
Previously, we'd immediately propagate unit state changes into any jobs
pending for them, always. With this we only do this if the manager is
out of the "reload" state. This fixes the problem #8803 tried to
address, by simply not completing jobs until after the reload (and thus
reestablishment of the dbus connection) is complete.
Note that there's no need to later on explicitly catch up with the
missed job state changes (i.e. there's no need to call
unit_process_job() later one explicitly). That's because for jobs in
JOB_WAITING state on deserialization all jobs are requeued into the run
queue anyway, and thus checked again if they can complete now. And for
JOB_RUNNING jobs unit_catchup() phase is going to trigger missed out
state changes *after* the reload complete anyway (after all that's what
distinguishes from unit_coldplug()).
Replaces: #8803
Let's add a helper call unit_deserialize_job() for this purpose, and
let's move registration in the global jobs hash table into
job_install_deserialized() so that it it is done after all superficial
checks are done, and before transitioning into installed states, so that
rollback code is not necessary anymore.
Let's validate that the ID is actually allocated to us before remove a
job.
This is relevant as various bits of code will call job_free() on
partially set up Job objects, and we really shouldn't remove another job
object accidentally from the hash table, when the set up didn't
complete.
Memory management is borked for this, and moreover this is unnecessary
since f0831ed2a0, i.e. since coldplug() and catchup() are two different
concepts: the former restoring the state from before a reload, the
latter than adjusting it again to the actual status in effect after the
reload.
Fixes: #10716
Mostly reverts: #8803
This is useful for distributions, where the stability of interface names should
be preseved after an upgrade of systemd. So when some specific release of the
distro is made available, systemd defaults to the latest & greatest naming
scheme, and subsequent updates set the same default. This default may still
be overriden through the kernel and env var options.
A special value "latest" is also allowed. Without a specific name, it is harder
to verride from meson. In case of 'combo' options, meson reads the default
during the initial configuration, and "remembers" this choice. When systemd is
updated, old build/ directories could keep the old default, which would be
annoying. Hence, "latest" is introduced to make it explicit, yet follow the
upstream. This is actually useful for the user too, because it may be used
as an override, without having to actually specify a version.
With this we can stabilize how naming works for network interfaces. A
user can request through a kernel cmdline option or an env var which
scheme to follow. The idea is that installers use this to set into stone
(a very soft stone though) the scheme used during installation so that
interface naming doesn't change afterwards anymore.
Why use env vars and kernel cmdline options, and not a config file of
its own?
Well, first of all there's no obvious existing one to use. But more
importantly: I have the feeling that this logic is kind of an incomplete
hack, and I simply don't want to do advertise this as a perfectly
working solution. So far we used env vars for the non-so-official
options and proper config files for the official stuff. Given how
incomplete this logic is (i.e. the big variable for naming remains the
kernel, which might expose sysfs attributes in newer versions that we
check for and didn't exist in older versions — and other problems like
this), I am simply not confident in giving this first-class exposure in
a primary configuration file.
Fixes: #10448
We would describe tmpfiles.d through what systemd-tmpfiles does with them, but
I think it's better to start with a geneneral statement what they are. Also,
let's make the description of volatile file systems less prominent.
Also, strenghten the advice to use RuntimeDirectory and mention
{Cache,Logs,Configuration,State}Directory=.
I think it is OK if some option is described as "similar to ..., but in
addition ...", as long as the "in addition" part is strictly additive this is
unambiguous. Otherwise, we'd have to repeat a lot of text, and then we'd
probably forget to adjust some of the descriptions when doing changes.
But when the "in addition" part is about replacing or removing parts of
functionality, it is better to avoid this pattern and describe the later option
from scratch.
Some paragraph breaks are added and minor changes made. UID/GID is changed to
user/group, since we generally expect user/group names to be used, not numeric
ids.
Fixes#11115.
Before:
Assertion 'mknod(devname, mode, devnum) == 0' failed at ../src/test/test-udev.c:116, function run(). Aborting.
Assertion 'unlink(devname) == 0' failed at ../src/test/test-udev.c:118, function run(). Aborting.
After:
mknod() failed for '/dev/sda': Operation not permitted
unlink('/dev/sda') failed: No such file or directory
cg_ns_supported() caches, so the condition was really checked just once, but
it looks weird to assign the return value to arg_use_cgns (if the variable is not present),
because then the other checks are effectively equivalent to
if (cg_ns_supported() && cg_ns_supported()) { ...
and later
if (!cg_ns_supported() || !cg_ns_supported()) { ...
