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Add a separate dm_report_field_string_list fn to libdevmapper to
support reporting string lists. Before, the code used libdevmappers's
dm_report_field_string fn which required formatting the list to a
single string. This functionality is now moved to libdevmapper
and the code that needs to report the string list just needs
to pass the list itself and libdevmapper will take care of this.
This also enhances code reuse.
The dm_report_field_string_list also accepts an argument to define
custom delimiter to use. If not defined, a default "," (comma) is
used as item delimiter in the string list reported.
The dm_report_field_string_list automatically sorts the items in
the list before formatting it to a final string. It also encodes
the position and length within the final string where each element
can be found. This can be used to support checking against each
list item reported since since when formatted as a single string
for the actual report, we would lose this information otherwise
(we don't want to copy each item, the position and length within
the final string is enough for us to get the original items back).
When such lists are checked against the selection tree, we can check
each item individually this way and we can support operators like
"match any" and "match all".
The list of strings is used quite frequently and we'd like to reuse
this simple structure for report selection support too. Make it part
of libdevmapper for general reuse throughout the code.
This also simplifies the LVM code a bit since we don't need to
include and manage lvm-types.h anymore (the string list was the
only structure defined there).
This is rebased and edited version of the original design and
patch proposed by Jun'ichi Nomura:
http://www.redhat.com/archives/dm-devel/2007-April/msg00025.html
The dm_report_init_with_selection is the same as dm_report_init
but it contains an additional argument to set the selection
in the form of a string that contains field names to check against and
selection operators. The selection string is parsend and a selection
tree is composed for use in the checks against individual fields when
the report is processed. The parsed selection tree is stored in dm_report
structure as "selection_root".
This is rebased and edited version of the original design and
patch proposed by Jun'ichi Nomura:
http://www.redhat.com/archives/dm-devel/2007-April/msg00025.html
Add support for parsing numbers, strings (quoted or unquoted), regexes
and operators amogst these operands in selection condition supplied.
This is rebased and edited version of the original design and
patch proposed by Jun'ichi Nomura:
http://www.redhat.com/archives/dm-devel/2007-April/msg00025.html
This patch defines operators and structures that will be used
to store the report selection against which the actual values
reported will be checked.
Selection operators
-------------------
Comparison operators:
=~ - Matching regular expression.
!~ - Not matching regular expression.
= - Equal to.
!= - Not equal to.
>= - Greater than or equal to.
> - Greater than
<= - Less than or equal to.
< - Less than.
Logical and grouping operators:
&& - All fields must match
, - All fields must match
|| - At least one field must match
# - At least one field must match
! - Logical negation
( - Left parenthesis
) - Right parenthesis
This makes it easier to check against the fields (following patches for
report selection) and check whether size units are allowed or not
with the field value.
Use NAME_LEN constant to simplify creation of device name.
Since the max size should be already tested in validation,
throw INTERNAL_ERROR if the size of vg/lv is bigger then NAME_LEN.
Let's use the size of origin as the real base for percenta calculation,
and 'silenly' add needed metadata space for snapshot.
So now command 'lvcreate -s -l100%ORIGIN vg/lv' should always create a
snapshot to handle full device overwrite.
Expresing -lXX%LV is not valid for snapshot, but error message for
snapshost case was not complete and missed %ORIGIN.
Also document correct settings for in manpage properly where
it missed %PVS.
While polling for snapshot, detect first the snapshot still
exits. It's valid to have multiple polling threads watching
for the same thing and just 1 can 'win' the finish part.
All others should nicely 'fail'.
If the we are polling an LV due to some sort of conversion and it
becomes inactive, a rather worrisome message is produced, e.g.:
" ABORTING: Mirror percentage check failed."
We can cleanly exit if we do a simple check to see if the LV is
active before performing the check. This eliminates the scary
message.
When creating a cache LV with a RAID origin, we need to ensure that
the sub-LVs of that origin properly change their names to include
the "_corig" extention of the top-level LV. We do this by first
performing a 'lv_rename_update' before making the call to
'insert_layer_for_lv'.
The thin-generic.profile contains settings for thin/thin pool volumes
suitable for generic environment/use containing default settings.
This allows users to change the global lvm.conf settings at will
and still keep the original settings for volumes that have this
thin profile assigned already.
Internal reporting function cannot handle NULL reporting value,
so ensure there is at least dummy label.
So move dummy_lable from tools/reporter.c and use it for all
report_object() calls in lib/report/report.c.
(Fixes RHBZ 1108394)
Simlify lvm_report_object initialization.
More updates to manglename option.
Add reference to LVM2 resource page, since for a long time,
this is the right places for sources for libdevmapper....
Add more time for tests, since debug kernels are getting slower...
and we add more and more tests.
However many test should be shortened to avoid testing disk-perfomance
and focus on lvm functionality...
(Often we should probably test with inactive volumes when we check
metadata operation of lvm2)
We may need to support option for 'DEEP' longer testing.
Also something like LVM_TEST_TIMEOUT_FACTOR might be useful
though it would be much better if test suite could approximete
from system perfomance test lenght...
Enable 'retry' deactivation also in 'cleanup' phase.
It shouldn't be mostly needed - however udev now produces
more and more completelny non-synchronizable device opens,
so even for orphan devices we can't easily predict where
udevd opens devices.
So it's more preferable here to log error about device being open
and retry clean, but let the command proceed.
