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In lookup, return a count of entries with the
same key rather than the value from a second
entry with the same key.
Using some slightly different names.
If the data len is passed into the hash table
and saved there, then the hash table internals
do not need to assume that the data value is
a string at any point.
New hash table functions are added that allow for
multiple entries with the same key. Use of the
vgname_to_vgid hash table is converted to these
new functions since there are multiple entries
in vgname_to_vgid that have the same key (vgname).
When multiple VGs with the same name exist, commands
that reference only a VG name will fail saying the
VG could not be found (that error message could be
improved.) Any command that works with the select
option can access one of the VGs with -S vg_uuid=X.
vgrename is a special case that allows the first VG
name arg to be replaced by a uuid, which also works.
(The existing hash table implementation is not well
suited for handling this case, but it works ok with
the new extensions. Changing lvmetad to use its own
custom hash tables may be preferable at some point.)
Add more functionality to size_changed function.
While 'existing' API only detected 0 for
unchanged, and !0 for changed,
new improved API will also detected if the
size has only went bigger - or there was
size reduction.
Function work for the whole dm-tree - so
no change is size is always 0.
only size extension 1.
and if some size reduction is there - returns -1.
This result can be used for better evaluation
whether we need to flush before suspend.
The new report/compact_output_cols setting has exactly the same effect
as report/compact_output setting. The difference is that with the new
setting it's possible to define which cols should be compacted exactly
in contrast to all cols in case of report/compact_output.
In case both compact_output and compact_output_cols is enabled/set,
the compact_output prevails.
For example:
$ lvmconfig --type full report/compact_output report/compact_output_cols
compact_output=0
compact_output_cols=""
$ lvs vg
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
lvol0 vg -wi-a----- 4.00m
---
$ lvmconfig --type full report/compact_output report/compact_output_cols
compact_output=0
compact_output_cols="data_percent,metadata_percent,pool_lv,move_pv,origin"
$ lvs vg
LV VG Attr LSize Log Cpy%Sync Convert
lvol0 vg -wi-a----- 4.00m
---
$ lvmconfig --type full report/compact_output report/compact_output_cols
compact_output=1
compact_output_cols="data_percent,metadata_percent,pool_lv,move_pv,origin"
$ lvs vg
LV VG Attr LSize
lvol0 vg -wi-a----- 4.00m
dm_report_compact_given_fields is the same as dm_report_compact_fields,
but it processes only given fields, not all the fields in the report
like dm_report_compact_field does.
Also make error messages more consistent:
Before this patch:
(/run/lock exists and is not a directory)
$ pvs
/run/lock/lvm: mkdir failed: Not a directory
File-based locking initialisation failed.
(/run/lock/lvm exists and is not a directory)
$ pvs
Directory "/run/lock/lvm" not found
File-based locking initialisation failed.
With this patch applied:
(/run/lock exists and is not a directory)
$ pvs
Existing path /run/lock is not a directory.
Failed to create directory /run/lock/lvm.
File-based locking initialisation failed
(/run/lock/lvm exists and is not a directory)
$ pvs
Existing path /run/lock/lvm is not a directory.
Failed to create directory /run/lock/lvm.
File-based locking initialisation failed.
When using udev, the /dev/mapper entries are symlinks - fix the code
to count with this.
This patch also fixes the dmsetup mknodes and vgmknodes to properly
repair /dev/mapper content if it sees dangling symlink in /dev/mapper.
$ lvs -o name,tags vg
LV LV Tags
lvol0
lvol1 mytag
Before this patch:
$ lvs -o name,tags vg -S 'tags=""'
Failed to parse string list value for selection field lv_tags.
Selection syntax error at 'tags=""'.
Use 'help' for selection to get more help.
(and the same for -S 'tags={}' and -S 'tags=[]')
With this patch applied:
$ lvs -o name,tags vg -S 'tags=""'
LV LV Tags
lvol0
(and the same for -S 'tags={}' and -S 'tags=[]')
Avoid validation of free space in pool, when no messages are passed.
Patch a3c7e326c3 add new check for
pool overload - but this check should not be made if there are
no messages and transaction_id is still within 'bounds' (bigger by 1).
Split up _build_histogram_arg() into separate functions to allocate
and fill the histogram arg string and remove nested local variable
declarations from the parent function.
Coverity flags a user-after-free in _stats_histograms_destroy():
>>> Calling "dm_pool_free" frees pointer "mem->chunk" which has
>>> already been freed.
This should not be possible since the histograms are destroyed in
reverse order of allocation:
203 for (n = _nr_areas_region(region) - 1; n; n--)
204 if (region->counters[n].histogram)
205 dm_pool_free(mem, region->counters[n].histogram);
It appears that Coverity is unaware that pool->chunk is updated
during the call to dm_pool_free() and valgrind flags no errors in
this function when called with multiple allocated histograms.
Since there is no actual need to free the histograms individually
in this way simplify the code and just free the first allocated
object (which will also free all later allocated histograms in a
single call).
The histogram changes adds a new error path to dm_stats_create().
Make sure that the dm_stats handle is properly destroyed if we fail
to create the histogram pool and check for failures setting the
program_id.
Since we are growing an object in the histogram pool the return
value of dm_pool_grow_object() must be checked and error paths need
to abandon the object before returning.
Older versions of gcc aren't able to track the assignments of
local variables as well as the latest versions leading to spurious
warnings like:
libdm-stats.c:2183: warning: "len" may be used uninitialized in this
function
libdm-stats.c:2177: warning: "minwidth" may be used uninitialized in
this function
Both of these variables are in fact assigned in all possible paths
through the function and later compilers do not produce these
warnings.
There's no reason to not initialize these variables though and
it makes the function slightly easier to follow.
Also fix one use of 'unsigned' for a nr_bins value.
