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Reuse same code for getting/setting cache parameters with lvcreate.
So there is single one place how to get vars from profiles and configs.
Variables declarations are moved to start of function and
there is no need to initialize them as they are always
defined by functions get_cache_params() and get_pool_params().
Since cache chunk might be huge and there is no technical need
to enforce rounding and there is actually more 'real' VG space
used then necessary - keep rounding on 'chunk' bounrary only
for thin volumes - where it's the space used anyway.
NB: we support conversion of any-size 'existing' LV into cached LV.
Fix missing reset of '*settings' pointer when no args were given.
Handle cache_chunk settings like all other settings, so it is properly
updated only with non-zero settings and the existing cache-pool
chunk_size is not being reconfigured.
User can specify metadata profile which stores important cache
geometry data for easy configuration.
Fix missing support for getting chunk_size, cache_mode, cache_policy
for a cache/cache pools volumes from configuration or metadata profile.
Split-off patch that just replaces returns with 'goto bad'
so there is single place to release policy_settings.
In the next patch we will start to use some shared
function call between lvconvert and lvcreate
(effectively restoring previous logic which has got lost).
To more easily recognize unselected state from select '0' state
add new 'THIN_ZERO_UNSELECTED' enum.
Same applies to THIN_DISCARDS_UNSELECTED.
For those we no longer need to use PASS_ARG_ZERO or PASS_ARG_DISCARDS.
Basically code moving operation to have a single place resolving
thin_pool_chunk_size_policy.
Supported are generic & performance profiles.
Function is now shared between thin manipulation code and configuration
_CFG logic to obtain defaults and handle correct reporting upward coding
stack.
Test for NULL in dm_stats_destroy() and return immediately if
the struct dm_stats pointer is NULL (similar to free(NULL)).
This simplifies cleanup code which otherwise needs to:
out:
if (dms)
dm_stats_destroy(dms);
return;
Older compilers cannot tell that the 'mode' variable is only
used in branches in which it is assigned:
dmsetup.c:5651: warning: "mode" may be used uninitialized in this function
dmsetup.c:5023: warning: "mode" may be used uninitialized in this function
Avoid this by always assigning the variable a value.
Older compilers are not able to determine that although group_id
is only assigned in one branch of a conditional, it is never used
used when the other branch is taken:
libdm-stats.c:3319: warning: "group_id" may be used uninitialized in this function
Avoid this by always initialising the variable when it is
declared.
Utilizing the --config option we will utilize global/notify_dbus=0 so
that the service itself doesn't generate change events which it then needs to
process.
We need to place query operations in the queue to prevent the case where
a client knows of something before the service does. For example if a
client creates a PV/VG/LV outside of the dbus API and then immediately
tries to lookup and use that resource in the lvm dbus service it should
be present. By placing the queries in the work queue any previous
refresh operation will complete before we process the query.
In addition to the already supported conversion between 2-legged
raid1 and raid5, raid1 and raid4 can be also converted into each
other with 2 legs (raid4/5 are limited to map a 2-legged raid1).
This patch supports the missing raid4 conversion in the sequence
linear -> 2-legged raid1 -> raid4/5, then restripe to more than one
data stripes for performance and resilience reasons and optionally
convert to striped/raid0.
The other conversion sequence is also possible by converting N-way
striped/raid0 to raid4/5, then restripe to 2 legs followed by a
conversion to raid1 and optionally to linear (loosing all resilience).
Add examples for reshaping number of stripes
and converting from raid6 to striped to raid10.
Remove trailing spaces.
Related: rhbz834579
Related: rhbz1191935
Related: rhbz1191978
The filemap daemon takes its program_id from the regions it is
managing: use DM_STATS_ALL_PROGRAMS when retrieving an initial
listing and then obtain the correct program_id from the group
leader.
