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Add matching support for -Z option also we doing full conversion
to cache-pool.
Extending coversion message to show which pool type is created
and whether the metadata will be wiped or remain unmodified.
Follow-up to 27a767d5e8.
Tunning behavior in a way we always prompt when option --zero is NOT specified.
Without -Z lvm expects user wants to 'reset' cache-pool metadata
(they could have been splitted from some cached LV)
If user doesn't want to zero metadata he needs to specify -Zn.
User may also avoid prompting for zeroing by using -Zy for
cache-pool (basically equals using --yes without -Z being given)
(unlike full convert case, there is no cache-pool being converted,
so there is not 'uncoditional' prompt in this case).
When volume was lvconvert-ed to a thin-volume with external origin,
then in case thin-pool was in non-zeroing mode
it's been printing WARNING about not zeroing thin volume - but
this is wanted and expected - so nothing to warn about.
So in this particular use case WARNING needs to be suppressed.
Adding parameter support for lvcreate_params.
So now lvconvert creates 'normal thin LV' in read-only mode
(so any read will 'return 0' for a moment)
then deactivate regular thin LV and reacreate in 'final R/RW' mode
thin LV with external origin and activate again.
Before, the automatic update from older to newer version of PV extension
header happened within vg_write call. This may have caused problems under
some circumnstances where there's a code in between vg_write and vg_commit
which may have failed. In such situation, we reverted precommitted metadata
and put back the state to working version of VG metadata.
However, we don't have revert for PV write operation at the moment. So
if we updated PV headers already and we reverted vg_write due to failure
in subsequent code (before vg_commit), we ended up with lost VG metadata
(because old metadata pointers got reset by the PV write operation).
To minimize problematic situations here, we should put vg_write and
vg_commit that is done after PV header rewrites as close to each
other as possible.
This patch moves the automatic PV header rewrite for new extension
header part from vg_write to _vg_read where it's done the same way
as we do any other VG repairs if detected during VG read operation
(under VG write lock).
When cache pool is reused for a new cached volume, there is
normally no need to 'keep' old cache-pool metadata as this
could cause major data lose.
Unlike with 'lvcreate -H -LX --cachepool' conversion, this lvconvert
path left the metadata unzeroed - partly for making easier some
debugging, but this was rather a bug.
So to keep possible reattach of 'unzeroed' metadata, user
now has to use 'lvconvert -Zn' for such conversion. In this case
the prompt will appear about possibe data loss and to proceed,
user has to confirm such operation. Without -Zn metadata are wiped.
Commit ca878a3426 changed behavior
or resize operation. Later the code has been futher changed
to skip fs resize completely when size of LV is already matching
and finaly at the most recent resize changeset for resize the
check for matching size has been eliminated as well so we ended
with a request call to resize fs to 0 size in some cases.
This commit reoders some test so the prompt happens just once before
resize of possibly 2 related volumes.
Also extra test for having LV already given size is added, and
whole metadata update is skipped for this case as the only
result would be an increment of seqno.
However the filesystem is still resized when requested,
so if the LV has some size and the resize is resolved to
the same size, the filesystem resize is called so in case FS
would not match, the resize will happen.
When logging to epoch files we would like to prevent creating too large
log files otherwise a spining command could fulfill available space
very easily and quickly.
Limit for to 100000 per command.
This patch fixes link validation for used thin-pool.
Udev rules correctly creates symlinks only for unused new thin-pool.
Such thin-pool can be used by foreing apps (like Docker) thus
has /dev/vg/lv link.
However when thin-pool becomes used by thinLV - this link is no
longer exposed to user - but internal verfication missed this
and caused messages like this to be printed upon 'vgchange -ay':
The link /dev/vg/pool should have been created by udev but it was not
found. Falling back to direct link creation.
And same with 'vgchange -an':
The link /dev/vg/pool should have been removed by udev but it is still
present. Falling back to direct link removal.
This patch ensures only unused thin-pool has this link.
This reverts commit fa69ed0bc8.
This code sometimes expects to be presented with a read-only filesystem
(during some boot sequences for example) and copes appropriately with
this and it should not lead to expected error messages that might cause
unnecessary alarm.
Add code to support more LVs to be resized through a same code path
using a single lvresize_params struct.
(Now it's used for thin-pool metadata resize,
next user will be snapshot virtual resize).
Update code to adjust percent amount resize for use_policies.
Properly activate inactive thin-pool in case of any pool resize
as the command should not 'deffer' this operation to next activation.
We have only 2 users of _lv_active() - one was already checking for ==1
while the other use (_lv_is_active()) could have take '-1' as a sign of having
an LV active. So return 0 and log_debug also the reason while detection
has failed (i.e. in case --driverload n - it's kind of expectable,
but might have confused user seeing just <backtrace>).
log_print is used during cmd line processing to log the result of the
operation (e.g. "Volume group vg successfully changed" and similar).
We don't want output from log_print to be interleaved with current
reports from group where log is reported as well. Also, the information
printed by log_print belongs to the log report too, so it should be
rerouted to log report if it's set.
Since the code in libdm-report which is responsible for doing the report
output uses log_print too, we need to use a different kind of log_print
which bypasses any log report currently used for logging (...simply,
we can't call log_print to output the log report itself which in turn
would again reroute to report - the report would never get on output
this way).
This patch adds structures and functions to reroute error and warning
logs to log report, if it's set.
There are 5 new functions:
- log_set_report
Set log report where logging will be rerouted.
- log_set_report_context
Set context globally so any report_cmdlog call will use it.
- log_set_report_object_type
Set object type globally so any report_cmdlog call will use it.
- log_set_report_object_name_and_id
Set object ID and name globally so any report_cmdlog call will use it.
- log_set_report_object_group_and_group_id
Set object group ID and name globally so any report_cmdlog call will use it.
These functions will be called during LVM command processing so any logs
which are rerouted to log report contain proper information about current
processing state.
The lvm fullreport works per VG and as such, the vg, lv, pv, seg and
pvseg subreport is done for each VG. However, if the PV is not part of
any VG yet, we still want to display pv and pvseg subreports for these
"orphan" PVs - so enable this for lvm fullreport's process_each_vg call.
