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Reduce #lv and intervals.
We are trying to ensure that the daemon stops while it's busy processing
its internal queues. Decrease the number of LVs and intervals to allow
this test to complete in less time.
Add a global timeout value to be used for the threads to end waiting for
whatever it is they are blocked on. The values varied from 2-5 seconds,
which is way longer than needed. Value of 0.5 shows no CPU load when
service is running and is idle.
Avoid problems for other libc like muslc and use dm_basename.
Prototype for basename has been removed from string.h from latest musl [1]
compilers e.g. clang-18 flags the absense of prototype as error. therefore
include libgen.h for providing it.
[1] https://git.musl-libc.org/cgit/musl/commit/?id=725e17ed6dff4d0cd22487bb64470881e86a92e7
Reported-by: Khem Raj <raj.khem@gmail.com>
Shuffle code to avoid using static variable to pass parsed option.
Code is now easier to follow and also number of coverity reports
will go away.
There should be no functional change.
Add debug tracing for syscall failures.
Also switch some log_error to log_warn when command does not exit
with 'error' result and only warns user.
Easier error path handling.
Initialize some vars at declaration time.
Here we actually need to slowdown only $dev2 - since repair operation
is only reading data from this device and compares it with origin $dev1,
and if they match there is no write...
Move memset() to the initialization function define_commands().
There is also not much point in clearing memory on command's exit
so drop zeroing of ~2M of RAM.
Use \0 as EOL in compiled-in syntax description to avoid
unnecessary line copy that just replaced \n with \0.
Also use already splitted lines when possible.
Handle mismatch of reported 'dm raid' status, where the active
raid LV can be actually showing higher numebr of raid leg devices,
that the number of shown status characters.
This can happen if the raid leg is dropped during initial
resynchronization.
We already create /dev/disk/by-uuid symlinks for DM devices which
contain crypto-type as next layer (as identified by blkid).
Also create /dev/disk/by-label symlinks as the labels can be
defined for crypto-type devices too.
Reported and fix suggested by: Patrick Plenefisch <simonpatp@gmail.com>
See also:
https://lore.kernel.org/lvm-devel/CAOCpoWfYjOVNJNt+cnOVXDHiDq2wRogTqBijcUoa7chqOLRa5Q@mail.gmail.com/
Setting db_persist is required for dm devices so that their properties
are carried over on switch-root from the initrd to the rootfs. This
logic has always lived in dracut
(https://github.com/dracutdevs/dracut/blob/master/modules.d/90dm/11-dm.rules).
However, this means that other initramfs generators each have to
implement and maintain the same rule which leads to unnecessary
duplication.
Instead, let's make the rule part of the upstream lvm rules, which
will ensure that generated initramfses will just work if they make
sure the lvm udev rules are installed, without having to figure out
that they have to add an extra rule themselves on top.
Identical rule in Arch Linux's lvm2 package: https://gitlab.archlinux.org/archlinux/packaging/packages/lvm2/-/blob/main/11-dm-initramfs.rules?ref_type=heads
For DM devices, the add/change/remove can appear as action for genuine
udev events.
However, there are more action types (bind, unbind, move, online, offline)
which never appear as actions for genuine DM udev events, but they can
still be synthesized (e.g. by writing "<action>" to "/sys/.../uevent" file
or by calling "udevadm trigger --action=<action>").
Let's also process these extra action types so that the udev-related content
is not lost completely, keeping all the symlinks and udev db entries just like
this was a synthetic udev event with "change" action.
Related to https://gitlab.com/lvmteam/lvm2/-/issues/4.
Bump the rules version in order to indicate that upper level rules
should consume DM_UDEV_DISABLE_OTHER_RULES_FLAG rather than DM_NOSCAN
and DM_SUSPENDED.
Also update the comments at the top of the file that describe the
exported properties, and add a note about internal device-mapper
properties.
Signed-off-by: Martin Wilck <mwilck@suse.com>
Reviewed-by: Peter Rajnoha <prajnoha@redhat.com>
