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Do not display settings with undefined default values, but do display
these settings in case the value is defined directly in any part of
the existing config cascade.
For example, the lvmconfig --type current always displays these settings
(as it's somewhere in "current" configuration cascade that makes it defined).
The lvmconfig --type full displays these settings only if it's defined
somewhere in the cascade, but not if default value is used instead
The lvmconfig --type default never displays these settings...
More concrete example - let's have activation/volume_list directly
set in lvm.conf and activation/read_only_volume_list not set.
Both of these settings have *undefined default* values.
$lvmconfig --type full activation/volume_list activation/read_only_volume_list
volume_list="/dev/vg/lv"
(...only volume_list is defined, hence it's printed)
However, the comments will display more info (see also previous commit):
$lvmconfig --type full activation/volume_list activation/read_only_volume_list --withsummary
# Configuration option activation/volume_list.
# Only LVs selected by this list are activated.
# This configuration option does not have a default value defined.
# Value defined in existing configuration has been used for this setting.
volume_list="/dev/vg/lv"
# Configuration option activation/read_only_volume_list.
# LVs in this list are activated in read-only mode.
# This configuration option does not have a default value defined.
Display comment abour value from existing config being used. For example:
$ lvmconfig --type full --withsummary report/compact_output report/buffered
# Configuration option report/compact_output.
# Do not print empty report fields.
# Value defined in existing configuration has been used for this setting.
compact_output=1
# Configuration option report/buffered.
# Buffer report output.
buffered=1
The lvmconfig --type full is actually a combination of --type current
and --type missing together with --mergedconfig options used.
The overall outcome is a configuration tree with settings as LVM sees
it when it looks for the values - that means, if the setting is defined
in some config source (lvm.conf, --config, lvmlocal.conf or any profile
that is used), the setting is used. Otherwise, if the setting is not
defined in any part of the config cascade, the defaults are used.
The --type full displays exactly this final tree with all the values
defined, either coming from configuration tree or from defaults.
Synchronize with udev logic before reusing device as snapshot.
This patch tries to fix the problem with udev, where we manage
to 'active' LV for clearing, then we deactivate such device and
active again as member of 'origin&snapshot' tree all in 1 step.
There needs to be a sync point where udev has time to remove all links,
otherwise we race with scans and we may end-up with mysterious 'free'
links in the system pointing to wrong dm names.
This patch tries to fix failing topology cluster tests..
We shouldn't be adding spaces by default in output as that
may be be used already in scripts and especially for the eval
in shell scripts where spaces are not allowed between key
and value!
Add --withspaces option to lvmconfig for pretty output with
more space in for readability.
It's not an error to define empty values for
{thin,cache}_{check,repair}_options - such empty value means no
options are passed when these external commands are called.
If blkid wiping is possible, than set use_blkid_wiping=1 and
use_blkid_wiping=0 otherwise for its default value. If blkid wiping
is disabled during configure and use_blkid_wiping=1 is set by chance,
it's simply ignored - this patch is just a cleanup that makes it more
obvious for the user (we use similar logic for use_lvmetad and
use_lvmpolld settings).
Default value for lvmetad and lvmpolld has hooks in configure script,
the "lvmconfig --type default --unconfigured" should display:
use_lvmetad = @DEFAULT_USE_LVMETAD@
use_lvmpolld = @DEFAULT_USE_LVMPOLLD@
Note that these settings are not of string type. Recent change (the
DM_CONFIG_VALUE_FMT_STRING_NO_QUOTES formatting flag) makes it
possible to recognize that the setting is not of string type and if
there's unconfigured value defined for it, the enclosing " " is
automatically removed on output.
Do not use "#S" (blank string) as default value as that ends up with
'key = [ "" ]' to be generated which is not what we want in most cases.
Also, fix default values for global/{thin,cache}_{check,repair}_options
and avoid assigning blank values. For example, the thin_check_options
had this set as default value previously:
"#S" DEFAULT_THIN_CHECK_OPTION1 "#S" DEFAULT_THIN_CHECK_OPTION2
If any (or both) of DEFAULT_THIN_CHECK_OPTION* variables was set
to "", we ended up with clumsy default value generated like:
thin_check_options = [ "-q", "" ]
With this patch, we end up with correct:
thin_check_options = [ "-q" ]
or, if all options are undefined:
thin_check_options = [ ]
Which is the correct way to express this.
There are two basic groups of formatting flags (32 bits):
- common ones applicable for all config value types (lower 16 bits)
- type-related formatting flags (higher 16 bits)
With this patch, we initially support four new flags that
modify the the way the config value is displayed:
Common flags:
=============
DM_CONFIG_VALUE_FMT_COMMON_ARRAY - causes array config values
to be enclosed in "[ ]" even if there's only one item
(previously, there was no way to recognize an array with one
item and scalar value, hence array values with one member
were always displayed without "[ ]" which libdm accepted
when reading, but it may have been misleading for users)
DM_CONFIG_VALUE_FMT_COMMON_EXTRA_SPACE - causes extra spaces to
be inserted in "key = value" (or key = [ value, value, ... ] in
case of arrays), compared to "key=value" seen on output before.
This makes the output more readable for users.
Type-related flags:
===================
DM_CONFIG_VALUE_FMT_INT_OCTAL - prints integers in octal form with
"0" as a prefix (libdm's config reading code can handle this via
strtol just fine so it's properly recognized as number in octal
form already if there's "0" used as prefix)
DM_CONFIG_VALUE_FMT_STRING_NO_QUOTES - makes it possible to print
strings without enclosing " "
This patch also adds dm_config_value_set_format_flags and
dm_config_value_get_format_flags functions to set and get
these formatting flags.
This is the client side handling of the global_invalid state
added to lvmetad in commit c595b50cec8a6b95c6ac4988912d1412f3cc0237.
The function added here:
. checks if the global state in lvmetad is invalid
. if so, scans disks to update the state in lvmetad
. clears the global_invalid flag in lvmetad
. updates the local udev db to reflect any changes
and update the lvmetad copy after it is reread from disk.
This is the client side handling of the vg_invalid state
added to lvmetad in commit c595b50cec8a6b95c6ac4988912d1412f3cc0237.
Use of display_lvname() in plain log_debug() may accumulate memory in
command context mempool. Use instead small ringbuffer which allows to
store cuple (10 ATM) names so upto 10 full names can be used at one.
We are not keeping full VG/LV names as it may eventually consume larger
amount of RAM resouces if vgname is longer and lots of LVs are in use.
Note: if there would be ever needed for displaing more names at once,
the limit should be raised (e.g. log_debug() would need to print more
then 10 LVs on a single line).
With thin-pool kernel target module 1.13 it's now support usage of
external origin with sizes which are not 'alligned' with chunk size
of thin-pool.
Enable lvm2 support for this and also fix reporting of data_percent
usage for case sizes are not alligned.
Note that this is just a quick fix and it needs more robust fix to
encompass any combination, not just the (old) snapshot one!
This started with this report:
https://bugzilla.redhat.com/show_bug.cgi?id=1219222
If we have devices/ignore_suspended_devices=1 set based on which we
filter out suspended devices as unusable (or if we ignore suspended
devices by force, e.g. during lvconvert called from dmeventd) and
when we have snapshot and snapshot origin devices in the play, we
need to look at their components unerneath (*-real and *-cow) to
check if they're not suspended. If they are, the snapshot/snapshot
origin is not usable as well and hence it needs to be filtered out
by filter-usable.c code which does suspended device filtering.
Not going into much details here, more details are in the bugzilla
mentioned above. However, this is a quick fix since snapshot
and this exact situation is not the only one. So this is
something that needs to be revisited and fixed properly
with full dm tree and checking the whole stack to state
whether the device at the very top is usable or not.
This patch fixes segfault which was caused by incorrectly marking some
settings CFG_DEFAULT_COMMENTED instead of CFG_DEFAULT_UNDEFINED - the
ones which have NULL default value, hence they're really undefined.
A regression caused by a98ceceb1d.
For example:
$ lvmconfig log/file
file="/a"
Before this patch:
$ lvmconfig --type diff
Segmentation fault (core dumped)
With this patch applied:
$ lvmconfig --type diff
log {
file="/a"
}
The same applies for these settings:
log/activate_file
global/library_dir
global/system_id_file
<disk_area>/disk_area_id
There were also other settings with NULL default value and marked as
CFG_DEFAULT_COMMENTED instead of CFG_DEFAULT_UNDEFINED, but they were
cfg_array config settings where the NULL value was not causing segfault
(NULL == empty array).
Just as 'e' means activation with an exclusive lock,
add an 's' to mean activation with a shared lock.
This allows the existing but implicit behavior of '-ay'
of clvm LVs to be specified explicitly. For local VGs,
asy simply means ay, just like aey means ay.
For local VGs, ay == aey == asy
For clvm VGs, ay == asy, aey == aey, asy == asy
lvmetad_init() should not be called with open connection to the daemon.
Doing so is considered to be an internall error within lvm2 code.
Such coincidence can't occur within current code. Let's assure us it won't
ever happen.
Some of descritpions were misleading at least. Some were completely
off the reality.
lvmetad_init doesn't re-establish or initialise a connection
lvmetad_active and lvmetad_connect_or_warn can do so.
These wrappers have been replaced by direct calls
to vg_read() and find_lv() in previous commits.
This commit should have no functional impact since
all bits were already unreachable.
Previous patch incorrectly skipped replace of @LOCALEDIR@.
The standard option is --localedir so use --with-localedir
as backward compatible option and set localedir if it's not
yet been set (if the could ever happen).
Use double-eval to translate $datarootdir to $prefix to real dir.
