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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.
Groupable args (the ones marked with ARG_GROUPABLE flag) start a new
group of args if:
- this is the first time we hit such a groupable arg,
- or if non-countable arg is repeated.
However, there may be cases where we want to give priorities when
forming groups and hence force new group creation if we hit an arg
with higher grouping priority.
For example, let's assume (for now) hypothetical sequence of args used:
lvs -o lv_name --configreport log -o log_type --configreport lv -o +vg_name
Without giving any priorites, we end up with:
lvs -o lv_name --configreport log -o log_type --configreport lv -o +vg_name
| | | | | |
\__________GROUP1___________/ \________GROUP2___________/ \_GROUP3_/
This is because we hit "-o" as the first groupable arg. The --configreport,
even though it's groupable too, it falls into the previous "-o" group.
While we may need to give priority to the --configreport arg that should
always start a new group in this scenario instead:
lvs -o lv_name --configreport log -o log_type --configreport lv -o +vg_name
| | | | | |
\_GROUP1_/ \_________GROUP2___________/ \_________GROUP3__________/
So here "-o" started a new group but since "--configreport" has higher
priority than "-o", it starts fresh new group now and hence the rest of
the command line's args are grouped by --configreport now.
lvm fullreport executes 5 subreports (vg, pv, lv, pvseg, seg) per each VG
(and so taking one VG lock each time) within one command which makes it
easier to produce full report about LVM entities.
Since all 5 subreports for a VG are done under a VG lock, the output is
more consistent mainly in cases where LVM entities may be changed in
parallel.
Wire up report group creation with log report in struct
processing_handle and call report_format_init during processing handle
initialization (init_processing_handle fn) and destroy it while
destroing processing handle (destroy_processing_handle fn).
This way, all the LVM command processing using processing handle
has access to log report via which the current command log
can be reported as items are processed.
New report/output_format configuration sets the output format used
for all LVM commands globally. Currently, there are 2 formats
recognized:
- basic (the classical basic output with columns and rows, used by default)
- json (output is in json format)
Add new --reportformat option and new report_format_init function that
checks this option and creates new report group accordingly, also
preparing log report handle and adding it to the report group just
created.
This is a preparation for new CMDLOG report type which is going to be
used for reporting LVM command log.
The new report type introduces several new fields (log_seq_num, log_type,
log_context, log_object_type, log_object_group, log_object_id, object_name,
log_message, log_errno, log_ret_code) as well as new configuration settings
to set this report type (report/command_log_sort and report/command_log_cols
lvm.conf settings).
This patch also introduces internal report_cmdlog helper function
which is a wrapper over dm_report_object to report command log via
CMDLOG report type and which is going to be used throughout the code
to report the log items.
Original code missed to catch all apperances of SIGINT.
Also enhance logging when running in shell without tty.
Accept this regex as valid input:
'^[ ^t]*([Yy]([Ee]([Ss]|)|)|[Nn]([Oo]|))[ ^t]*$'
Commit #5b3a4a9 caused the "name" variable to be cleared if
declaration and assignment is on two lines so put it back
so it's on one line for it to work again.
