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Refactor continue_via_systemd() and it's calls to make it more readable.
No functional changes.
Signed-off-by: Mateusz Kusiak <mateusz.kusiak@intel.com>
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mdadm --grow --continue has no functionality to restore critical sectors
if reshape was stopped during operation. This functionality belongs to
assemble or incremental.
This patch adds hints to error messages, to try to reassemble array in
case of reshape failure to restore critical sector, so assemble can
handle restoration.
Signed-off-by: Mateusz Kusiak <mateusz.kusiak@intel.com>
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There are numerous issues for --grow --continue in switchroot phrase,
they include:
* Events being missed for restarting grow-continue service. This is
apparent mostly on OS on RAID scenarios. When a checkpoint (next step)
is committed, we have no reliable way to gracefully stop reshape until
it reaches that checkpoint. During boot, there's heavy I/O utilisation,
which causes sync speed drop, and naturally checkpoint takes longer to
reach. This further causes systemd to forcefully kill grow-continue
service due to timeouts, which results in udev event being missed for
grow-continue service restart.
* Grow-continue (seemingly) was not designed to be restarted without
reassembly, some things like stopping chunksize (to lower) migration
were straight up not working until recently.
This patch makes grow-continue (actual reshape) start after switchroot
phrase. This way we should not encounter issues related to restarting
the service.
Add checks not start a reshape if in initrd, let it initialise only.
Change grow-continue udev rule to be triggered whenever there's a
reshape happening in metadata, rely on udev event to kick reshape after
switchroot. Add handle_forking helper function for reshapes to avoid
duplicating code.
Signed-off-by: Mateusz Kusiak <mateusz.kusiak@intel.com>
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Display if there's an ongoing reshape happening in mdadm --detail
--export output.
This change is needed for incoming patches that will change "grow
continue" udev rules, to be based on actual array state.
Signed-off-by: Mateusz Kusiak <mateusz.kusiak@intel.com>
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This commit removes --freeze-reshape logic, it basicaly reverts
commit b76b30e0f950 ("Do not continue reshape during initrd phase").
--freeze-reshape was supposed to be used to restore critical sector in
incremental and assemble operations without starting a reshape process,
but it's meaning has been lost through the years and it is not
currently used.
A replacement for this logic will be added in incoming patches, so
reshapes won't be started in initrd phrase.
Signed-off-by: Mateusz Kusiak <mateusz.kusiak@intel.com>
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Remove external bitmap support from manual.
Signed-off-by: Mariusz Tkaczyk <mtkaczyk@kernel.org>
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