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The extent size must fits all blocks in 4294967295 sectors
(in 512b units) this is 1/2 KiB less then 2TiB.
So while previous statement 'suggested' 2TiB is still acceptable value,
make it clear it's not.
As now we support any multiples of 128KB as extent size -
values like 2047G will still 'flow-in' otherwise the largest power-of-2
supported value is 1TiB.
With 1TiB user needs 8388608 extents for 8EiB device.
(FYI such device is already unusable with todays glibc-2.22.90-27)
4GiB extent size is currently the smallest extent size which allows
a user to create 8EiB devices (with 2GiB it's less then 8EiB).
TODO: lvm2 may possibly print amount of 'lost/unused space' on a PV,
since using such ridiculously sized extent size may result in huge
space being left unaccessible.
There are two basic groups of fields for LV segment device reporting:
- related to LV segment's devices: devices and seg_pe_ranges
- related to LV segment's metadata devices: metadata_devices and seg_metadata_le_ranges
The devices and metadata_devices report devices in this format:
"device_name(extent_start)"
The seg_pe_ranges and seg_metadata_le_ranges report devices in
this format:
"device_name:extent_start-extent_end"
This patch reverts partly what commit 7f74a99502
(v 2.02.140) introduced in this area - it added [] for
hidden devices to mark them for all four fields mentioned above.
We won't be marking hidden devices in devices and metadata_devices
fields.
The seg_metadata_le_ranges field will have hidden devices marked -
it's new enough that we don't need to care about compatibility much
yet.
The seg_pe_ranges is old enough that we shouldn't be changing this
one - so we're reverting to not marking hidden devices here.
Instead, there's going to be a new field "seg_le_ranges" which
is going to replace the seg_pe_ranges and it will mark hidden devices -
this is going to be introduced in a patch later.
So in the end we'll end up with:
(LV segment's devices)
devices field with "device_name(extent_start)" format, not marking hidden devices
seg_pe_ranges field with "device_name:extent_start-extent_end" format, not marking hidden devices (deprecated, new seg_le_ranges should be used instead for standardized format)
seg_le_ranges field with "device_name:extent_start-extent_end" format, marking hidden devices
(LV segment's metadata devices)
metadata_devices field with "device_name:extent_start-extent_end" format, not marking hidden devices
seg_metadata_le_ranges field with "device_name:extent_start-extent_end" format, marking hidden devices
Also, both seg_le_ranges and seg_metadata_le_ranges will honour the
report/list_item_separator setting which can be used to configure
the delimiter used for list items.
So, to sum it up, we will recommend using the new seg_le_ranges and
seg_metadata_le_ranges fields because they display devices with
standard extent range format, they can mark hidden devices and they
honour the report/list_item_separator setting.
We'll be keeping devices,seg_pe_ranges and metadata_devices fields
for compatibility.
The associated devices,metadata_devices,seg_pe_ranges and
seg_metadata_le_ranges are reported as genuine string lists now.
This allows for using the items separately in -S|--select
(so searching for subsets etc.) and also it allows for
configuring the separator using report/list_item_separator
which may be useful in scripts (however, we'll enable this
only for seg_le_metadata_ranges and not for devices,seg_pe_ranges
and seg_metadata_devices for compatibility reasons - see following
patch).
When reporting on LVs, take the end of the range from the size of the
underlying (hidden) LV rather than the logical size of the current
segment (that PVs use).
Existing cache_settings field displays the settings which are
saved in metadata. Add new kernel_cache_settings fields to display
the settings which are currently used by kernel, including fields
for which default values are used.
This way users have complete view of the set of cache settings
supported (and which they can set) and their values which are used
at the moment by kernel.
For example:
$ lvs -o name,cache_policy,cache_settings,kernel_cache_settings vg
LV Cache Policy Cache Settings KCache Settings
cached1 mq migration_threshold=1024,write_promote_adjustment=2 migration_threshold=1024,random_threshold=4,sequential_threshold=512,discard_promote_adjustment=1,read_promote_adjustment=4,write_promote_adjustment=2
cached2 smq migration_threshold=1024 migration_threshold=1024
cached3 smq migration_threshold=2048
Fix lvm2app to return either 0 or 1 for lvm_vg_is_{clustered,exported},
including internal functions pvseg_is_allocated and vg_is_resizeable
which are not yet exposed in lvm2app but make them consistent with the
rest.
This reverts e28e22b9e1
The problem that that commit was fixing (pytest failure)
no longer appears with the current code, so the commit is
not needed.
That commit is a problem for pvchange, because it prevents
lvmcache from retaining VG metadata even while the global
lock is held. pvchange holds the global lock to ensure
that VG metadata is kept in lvmcache throughout processing.
If the cache is not kept, a PV with zero MDAs will appear
first in its actual VG and then appear again in the orphan VG.
It wrongly appears a second time in the orphan VG only if
the actual VG is dropped from lvmcache.
Thin pool discard mode set in metadata can be different from the one
actually used if any device underneath does not support that mode. Add
kernel_discard report field to make it possible to see this difference.
Internal _alloc_init() is only called from allocate_extents(),
which already does prevent usage of virtual segments.
So mark as internal error early and do not process it any further.
Add new test for lv_is_snapshot().
Also move few other bitchecks into same place as remaining bit tests.
TODO: drop lv_is_merging_origin() and keep using lv_is_merging().
Include brackets for the name if the dev is invisible.
This change applies to all callers of _format_pvsegs fn:
- lvseg_devices (the "lvs -o devices")
- lvseg_metadata_devices (the "lvs -o metadata_devices)
- lvseg_seg_pe_ranges (the "lvs -o seg_pe_ranges")
- lvseg_seg_metadata_le_ranges (the "lvs -o seg_metadata_le_ranges")
The common lv_pool_lv fn avoids code duplication and also
the reporting part now uses _lvname_disp and _uuid_disp to display
name and uuid respectively, including brackets for the name if the
dev is invisible.
The common lv_metadata_lv fn avoids code duplication and also
the reporting part now uses _lvname_disp and _uuid_disp to display
name and uuid respectively, including brackets for the name if the
dev is invisible.
The common lv_data_lv fn avoids code duplication and also
the reporting part now uses _lvname_disp and _uuid_disp to display
name and uuid respectively, including brackets for the name if the
dev is invisible.
The common lv_mirror_log_lv fn avoids code duplication and also
the reporting part now uses _lvname_disp and _uuid_disp to display
name and uuid respectively, including brackets for the name if the
dev is invisible.
The common lv_origin_lv fn avoids code duplication and also
the reporting part now uses _lvname_disp and _uuid_disp to display
name and uuid respectively, including brackets for the name if the
dev is invisible.
The common lv_convert_lv fn avoids code duplication and also
the reporting part now uses _lvname_disp and _uuid_disp to display
name and uuid respectively, including brackets for the name if the
dev is invisible.
Use common _lvname_disp to report lv_parent. The _lvname_disp
takes care of properly marking LVs which are not visible - such
LVs are always enclosed in brackets when reported within any
other field.
For example, thin pool over RAID.
Before:
$ lvs -a -o name,lv_parent,data_lv,metadata_lv vg
LV Parent Data Meta
cache_pool [cache_pool_tdata] [cache_pool_tmeta]
[cache_pool_tdata] cache_pool
[cache_pool_tdata_rimage_0] cache_pool_tdata
[cache_pool_tdata_rimage_1] cache_pool_tdata
[cache_pool_tdata_rmeta_0] cache_pool_tdata
[cache_pool_tdata_rmeta_1] cache_pool_tdata
[cache_pool_tmeta] cache_pool
[cache_pool_tmeta_rimage_0] cache_pool_tmeta
[cache_pool_tmeta_rimage_1] cache_pool_tmeta
[cache_pool_tmeta_rmeta_0] cache_pool_tmeta
[cache_pool_tmeta_rmeta_1] cache_pool_tmeta
[lvol0_pmspare]
With this patch applied:
$ lvs -a -o name,lv_parent,data_lv,metadata_lv vg
LV Parent Data Meta
cache_pool [cache_pool_tdata] [cache_pool_tmeta]
[cache_pool_tdata] cache_pool
[cache_pool_tdata_rimage_0] [cache_pool_tdata]
[cache_pool_tdata_rimage_1] [cache_pool_tdata]
[cache_pool_tdata_rmeta_0] [cache_pool_tdata]
[cache_pool_tdata_rmeta_1] [cache_pool_tdata]
[cache_pool_tmeta] cache_pool
[cache_pool_tmeta_rimage_0] [cache_pool_tmeta]
[cache_pool_tmeta_rimage_1] [cache_pool_tmeta]
[cache_pool_tmeta_rmeta_0] [cache_pool_tmeta]
[cache_pool_tmeta_rmeta_1] [cache_pool_tmeta]
[lvol0_pmspare]
Do not mix dm_report_field_set_value and _field_set_value and
use single function call throughout for clarity. The same applies
for dm_report_field_string and _string_disp.
Fix regression caused by commit c2d4330f27
which removed the dm_pool_strdup for the cache policy name in
_cache_policy_disp report function.
This regression was hit with buffered reporting only (which is
used by default). The reason is that for buffered reporting, we're
iterating over LVs in VG (process_each_lv) while gathering
all the information that is needed for the report. In this case,
the LV's cache policy name has not been duped, but only the pointer
to the original VG buffer was stored. When the LV iteration finished,
the VG buffer was freed and any report to output called later
(dm_report_output call) accessed already freed VG data.
This didn't appear if unbuffered reporting was used (--unbuffered)
because in this case, the data were reported to output as
soon as they were processed, hence it was reported to output
before the VG data was freed.
Have commands send lvmlockd the update message
in vg_write instead of vg_commit, so that it's
not done while LVs are suspended. If the vg_write
is not committed, and the seqno sent to lvmlockd
is not used, then lvmlockd can detect this when
the next update uses the same seqno.
Use process_each_vg() to lock and read the old VG,
and then call the main vgrename code.
When real VG names are used (not a UUID in place of the
old name), the command still pre-locks the new name
(when strcmp wants it locked first), before calling
process_each_vg on the old name.
In the case where the old name is replaced with a UUID,
process_each_vg now translates that UUID into the real
VG name, which it locks and reads. In this case, we
cannot do pre-locking to maintain lock ordering because
the old name is unknown. So, in this case the strcmp
based lock ordering is suppressed and the old name is
always locked first. This opens a remote chance for
lock ordering conflict between racing vgrenames between
two names where one or both commands use the UUID.
Before commit c1f246fedf,
_get_all_devices() did a full device scan before
get_vgnameids() was called. The full scan in
_get_all_devices() is from calling dev_iter_create(f, 1).
The '1' arg forces a full scan.
By doing a full scan in _get_all_devices(), new devices
were added to dev-cache before get_vgnameids() began
scanning labels. So, labels would be read from new devices.
(e.g. by the first 'pvs' command after the new device appeared.)
After that commit, _get_all_devices() was called
after get_vgnameids() was finished scanning labels.
So, new devices would be missed while scanning labels.
When _get_all_devices() saw the new devices (after
labels were scanned), those devices were added to
the .cache file. This meant that the second 'pvs'
command would see the devices because they would be
in .cache.
Now, the full device scan is factored out of
_get_all_devices() and called by itself at the
start of the command so that new devices will
be known before get_vgnameids() scans labels.
Since we mark cache-pool as 'hidden/private' while it is in-use,
we may still allow user to change it's name.
It should not cause any harm and user may prefer better naming
for a cache-pool in use.
It's getting a bit more complex here.
Basic idea behind is - check_current_backup() should not
log error when a user is using a read-only filesystem,
so e.g. vgscan will not report any error when it tries
to take missing backup.
We still have cases when error could be reported though,
e.g. the backup this would be a symbolic link, but these
are rather misconfiguration and unexpected case.
We have to modes of 'archive()' usage -
1. compulsory - fail stops command and user may try '-An' option
to do a command.
2. non-compulsory - some fails in archiving are ignorable (i.e.
read-only filesystem where archive dir is located).
Those 2 cases needs to be properly handle - i.e. the non-compulsory
logging should not be tampering error logging message production.
So more work here is needed
Pass full buffer size to printf() function - no reason to make
buffer 1 char smaller.
Also rename locn buffer to message buffer directly since it's
not used for anything else.
TODO: we may use same buffer also for 'buf[]' since there is
no collision - so may safe 1K on stack usage.
When two different VGs with the same name exist,
they are both stored in lvmcache using the vginfo->next
list. Previously, the code would print warnings (sometimes)
when adding VGs to this list. Now the duplicate VG names
are handled by higher level code, so this list no longer
needs to print warnings about duplicate VG names being found.
After recent changes to process_each, vg_read() is usually
given both the vgname and vgid for the intended VG.
However, in some cases vg_read() is given a vgid with
no vgname, or is given a vgname with no vgid.
When given a vgid with no vgname, vg_read() uses lvmcache
to look up the vgname using the vgid. If the vgname is
not found, vg_read() fails.
When given a vgname with no vgid, vg_read() should also
use lvmcache to look up the vgid using the vgname.
If the vgid is not found, vg_read() fails.
If the lvmcache lookup finds multiple vgids for the
vgname, then the lookup fails, causing vg_read() to fail
because the intended VG is uncertain.
Usually, both vgname and vgid for the intended VG are passed
to vg_read(), which means the lvmcache translations
between vgname and vgid are not done.
When not using lvmetad, this uses the system_id field in
the cached vginfo structs that are populated during a scan.
When using lvmetad, this requests the VG from lvmetad, and
checks the system_id field in the returned metadata.
When the command already knows both the vgid and vgname,
it should send both to lvmetad for a more exact request,
and it can save lvmetad the work of a name lookup.
Remove long outstand unused code lines, which were already
been obsoleted by other code.
Statuses and snapshot tree creation is already handled differently.
Also drop some 'extra' log_error() and use only stack;
since error has already been reported.
Since we do not use dev_manager in a way we would have destroyed VG
content while in-use - we could safely keep just pointer.
So dropping strdup.
Also it seems we actually no longer use vg_name for anything
so it may possibly go away completely unless it would be useful
for debugging...
Just for convenience to display all new configuration settings
introduced since given version (before, there was only --atversion
to display settings introduced in concrete version).
For example:
$ lvmconfig --type new --sinceversion 2.2.120
allocation {
# cache_mode="writethrough"
# cache_settings {
# }
}
global {
use_lvmlockd=0
# lvmlockd_lock_retries=3
# sanlock_lv_extend=256
use_lvmpolld=1
}
activation {
}
# report {
# compact_output_cols=""
# time_format="%Y-%m-%d %T %z"
# }
local {
# host_id=0
}
Unifying terminology.
Since all the metadata in-use are ALWAYS on disk - switch
to terminology committed and precommitted.
Patch has no functional change inside.
lv preload for detached LVs started to be used also
for various other types which just happens to pass through
weak if() condition.
TODO: find here better solution to rather explicitly check
for types we really need to preload.
We do not won't to 'expose' internals of VG struct.
ATM we use lists to keep all LVs - we may want to switch
to better struct for quicker 'search'.
Since we do not need 'lists' but always actual LV,
switch find_lv_in_vg_by_lvid() to return LV,
and replaces some use case of find_lv_in_vg()
with 'better' working find_lv() which already
returns LV.
When 'lvextend -L+XX vg/thinpool' do not leave inactive table
loaded for 'wrapping' LV on top of resized thin-pool
(ATM we use linear LV for this with same size as thin-pool).
Udev recently start to 'link-in' major amount of useless libs.
(Seem to be faulty 'systemd' link-in all issue)
Anyway - avoid locking those libs in RAM.
Coverity here is a bit 'blind' here and cannot resolve which
code paths are actually able to hit this code path.
(It's using 'statistic' to resolve all possible paths,
and it's not scanning 'individual' code paths.)
This just cleans warns and add 'cheap' tests.
Use 'mda' instead of NULL to quite Coverity warn.
However this code seems to be actually not even possible to hit.
With proper analysis it may possibly be dropped from code to
simplify logic.
Skip testing target_pvs for NULL, we already
dereference it in many other places.
If check would ever be needed - it needs to be
in front of _raid_extract_images().
When reading older lvm2 metadata for cache-pool - we now handle more
extended syntax - basically we want to enter most setting when
actually creating cached LV.
For this new validation code has been added. However older metadata
without new settings set is now found as invalid.
Fix it by adding default settings for cache policy mq
and cache mode writethrough.
Here Coverity cannot see the pointer cannot be NULL in this
code path - opened coverity case #00531860.
We could make a model to avoid seeing related reports,
but then we loose coverage for modeled function.
So decided to add minor hint for this case.
The udev_device_get_is_initialized is available since libudev version
165. Older versions are still used somewhere (e.g. RHEL6). So better
check for this fn and use it only if it's available.
Udev db records are marked as not initialized (incomplete) on timeout.
Issue an error message whenever LVM finds such records so users are
aware that something's going wrong with udev db.
This is important in case we use devices/external_device_info_source="udev"
where udev database records are used to do various filtering decisions.
For example:
udev log of timed out worker:
Nov 11 13:02:25 raw.virt systemd-udevd[607]: seq 1997 '/devices/virtual/block/dm-2' is taking a long time
Nov 11 13:04:25 raw.virt systemd-udevd[607]: seq 1997 '/devices/virtual/block/dm-2' killed
Nov 11 13:04:25 raw.virt systemd-udevd[607]: worker [11221] terminated by signal 9 (Killed)
Nov 11 13:04:25 raw.virt systemd-udevd[607]: worker [11221] failed while handling '/devices/virtual/block/dm-2'
...
LVM also issues error message visibly if incomplete udev db record is found,
devices/external_device_info_source="udev" is set:
$ pvs
Udev database has incomplete information about device /dev/dm-2.
Failed to get external handle for device /dev/dm-2 [udev].
...
Coverity noticed this condition is always false and the error
path could never be visited.
So check for all mismatches of supported messages
and actually mark log_error as internal error.
Doing 'stat' checking first and later opening is racy.
And since we do not really care about any 'status' info
here and we read 'sysfs' here - just drop whole 'stat()'
call and directly handle error from failing 'fopen()'.
Currently the code creates the log separately after allocating space for
the data and as no data allocation is needed this second time,
total_extents ends up holding zero so use new_extents directly instead.
When reading a foreign VG we cannot write it, since
it belongs to another host. When reading a shared VG
we cannot write it because we may not have an ex lock.
(Or we may be reading the shared VG while not using
lvmlockd in which case it's like reading a foreign VG.)
Add the same checks for wiping outdated PVs. We may
read a foreign or shared VG, or see the PVs, while
another host is part way through writing a new version
of the VG to the PVs. This might cause us to think
some of the PVs are outdated. We do not want to
write another host's PVs, especially when we may
wrongly conclude they are outdated.
When the command gets a list of alternate devices
from lvmetad, log each one directly. This is not
the same as the warnings when adding lvmcache,
which are related to which duplicate is preferred.
The str_list_destroy function may be called to cleanup memory when
the list is not used anymore and the list itself was not allocated
from the memory pool.
When checking minimum mda size, make sure the mda_size after alignment
and calculation is more than 0 - if there's no place for an MDA at the
end of the disk, the _text_pv_add_metadata_area does not try to add it
there and it returns (because we already have the MDA at the start of
the disk at least).
Actually, we don't need extra condition as introduced in commit
00348c0a63. We should fix the last
condition:
(mdac->rlocn.size >= mdah->size)
...which should be:
(MDA_HEADER_SIZE + (rlocn ? rlocn->size : 0) + mdac->rlocn.size >= mdah->size))
Where the "mdac" is new metadata, the "rlocn" is old metadata.
So the main problem with the previous condition was that it
didn't count in MDA_HEADER_SIZE properly (and possible existing
metadata - the "rlocn"). This could have caused the error state
where metadata in ring buffer overlap to not be hit.
Replace the new condition introduced in 00348c0a63
with the improved one for the condition that existed there
already but it was just incomplete.
We're already checking whether old and new meta do not overlap in
ring buffer (as we need to keep both old and new meta during vg_write
up until vg_commit).
We also need to check whether the new metadata do not overlap
themselves in case we don't have old metadata yet (...because
we're in vgcreate). This could happen if we're creating a VG so
that the very first metadata written are long enough that it wraps
themselves in metadata ring buffer.
Although we limited the minimum metadata area size better with the
previous commit ccb8da404d which
makes the initial VG metadata overlap in ring buffer to be less
probable, the risk of hitting this overlap condition is still there
if we still manage to generate big enough metadata somehow.
For example, users can provide many and/or long VG tags during vgcreate
so that the VG metadata is long enough to start to wrap in the ring
buffer again...
This option could never have been printed in lvm2 metadata, so it could
be safely removed as it could have been set only as 0.
These configurable setting is supported via metadata profile.
Now with correctly functioning dmeventd enable usage of
low_water_mark for faster reaction on pool's threshold.
When user select e.g. 80% as a threshold value,
dmeventd doesn't need to wait 10 seconds till monitoring
timer expires, but nearly instantly resizes thin-pool
to fit bellow threshold.
The former patch(dab3ebce4c) is a little bit strict. For example, it is
OK to create PV on unpartitioned DASD devices with LDL formatted. So
after lvm version containing the patch, LVs created on those devices
could not be found.
Signed-off-by: Lidong Zhong <lzhong@suse.com>
Recognize the target only 'extends' and do not enforce
'flush' in this case. Only the size reduction
still requires flush (so disables usage of no_flush flag).
If some other targets do require flush before suspend,
they have to explicitly ask for it.
While the activation code tries to evaluate which target
really needs flush with suspend and which may go without flush,
it has stayed effectively disabled by original commit:
33f732c5e9 since here
it only allows to pass non-pvmoving 'mirrors'.
So remove check for mirror LV type and only disable
no_flush for 'pvmove'..
TODO: Looking into history - it also seemed like raid target
would have always required flushing but it's been later
removed without clean explanation.
If some more targets really do need 'no_flush' it should
been handle at their 'level' - since we now stack multiple
targets over itself.
Use single code to evaluate if the percentage value has
crossed threshold.
Recalculate amount value to always fit bellow
threshold so there are not need any extra reiterations
to reach this state in case policy amount is too small.
Since plugin's percentage compare has been fixed,
it's now revealed wrong compare here.
The logic for threshold is - to allow to go as high
as given value e.g. 80% - so if pool is exactlu 80%
full it's still allowed to use it (dmeventd will not
resize it).
Running "vgremove -f VG & pvs" results in the pvs
command reporting that the VG is not found or is
inconsistent. If the VG is gone or being removed,
the pvs command should just skip it and not print
errors about it.
"Not found" is because the pvs command created the
list of VGs to process, including VG, then vgremove
removed the VG, then the pvs command came to to read
the VG to process it and did not find it.
An "inconsistent" error could be reported if vgremove
had only partially completed removing VG when pvs did
vg_read on the VG to process it, causing pvs to find
the VG in a partially-removed state.
This fix adds a flag that pvs uses to ignore a VG
that can't be read or is inconsistent.
When lvmetad is used and lvmcache update function (lvmcache_update_vgname_and_id)
was called to update existing lvmcache records, a condition was met
which made to retun from the update function immediately, effectively
making it NOOP.
It seems there's no reason for such condition and lvmcache should be
update appropriately even when lvmetad used as lvmcache may be reused,
most notably in lvm shell.
It's possible this is a remnant of the lvmetad development code which
didn't get removed for some reason and the bug didn't get spotted
because lvm shell is not used often (the condition dates back to 2012
or so).
Example, lvmetad and lvm shell used:
lvm> pvs
PV VG Fmt Attr PSize PFree
/dev/sda vg lvm2 a-- 124.00m 124.00m
Before this patch:
==================
lvm> vgremove vg
Volume group "vg" successfully removed
lvm> pvs
With this patch applied:
========================
lvm> vgremove vg
Volume group "vg" successfully removed
lvm> pvs
PV VG Fmt Attr PSize PFree
/dev/sda lvm2 --- 128.00m 128.00m
The lvmcache info might be resued, most notably in lvm shell.
We need to be sure that even lvmcache_info marked as invalid
is removed from the lvmcache so it does not confuse any subsequent
code/commands executed later on.
Problematic example with the lvm shell:
lvm> pvs
PV VG Fmt Attr PSize PFree
/dev/sda lvm2 --- 128.00m 128.00m
Before this patch (/dev/sda still displayed in a way):
======================================================
lvm> pvremove /dev/sda
Labels on physical volume "/dev/sda" successfully wiped
(without lvmetad)
lvm> pvs
No physical volume label read from /dev/sda
(with lvmetad)
lvm> pvs
PV VG Fmt Attr PSize PFree
/dev/sda lvm2 --- 128.00m 128.00m
With this patch applied:
========================
lvm> pvremove /dev/sda
Labels on physical volume "/dev/sda" successfully wiped
(without lvmetad)
lvm> pvs
(with lvmetad)
lvm> pvs
Make lvm2_disable_dmeventd_monitoring() more explicit.
As memlock_inc_daemon() is also used by clvmd, which
does changes dmeventd and suspend ignore state at
some stages - make updates of these 2 variable
tied to the call of lvm2_disable_dmeventd_monitoring().
Once this call is made dmeventd monitoring
and suspended devices are ignored.
TODO: all lvm-global settings should really be moved
to command context.
The old code made two loops through the PVs: in the first
loop it found the max PV and VG name lengths, and in the
second loop it printed each PV using the name lengths as
field widths for aligning columns.
The new code uses process_each_pv() which makes one loop
through the PVs. In the *first* call to pvscan_single(),
the max name lengths are found by looping through the
lvmcache entries which have been populated by the generic
process_each code prior to calling any _single functions.
Subsequent calls to pvscan_single() reuse the max lengths
that were found by the first call.
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
This reverts commit 1b1c01a27b.
This caused messages to get dropped instead of logged into the log file.
(The log file and log function are independent at the moment.)
Some signatures are spread around the disk in several copies, mainly for
backup. Make libblkid to detect these extra copies - there was missing
"blkid_probe_step_back" fn call after successful wipe of previous signature
copy.
An example with FAT table which has copies:
$ mkfs.vfat /dev/sda1
Before this patch:
$ pvcreate /dev/sda1
WARNING: vfat signature detected on /dev/sda1 at offset 54. Wipe it? [y/n]: y
Wiping vfat signature on /dev/sda1.
Physical volume "/dev/sda1" successfully created
With this patch applied:
$ pvcreate /dev/sda1
WARNING: vfat signature detected on /dev/sda1 at offset 54. Wipe it? [y/n]: y
Wiping vfat signature on /dev/sda1.
WARNING: vfat signature detected on /dev/sda1 at offset 0. Wipe it? [y/n]: y
Wiping vfat signature on /dev/sda1.
WARNING: vfat signature detected on /dev/sda1 at offset 510. Wipe it? [y/n]: y
Wiping vfat signature on /dev/sda1.
Physical volume "/dev/sda1" successfully created
If lvmlockd is running, lvmetad is configured (use_lvmetad=1),
but lvmetad is not running, then commands will seg fault
when trying to send a message to lvmetad.
The difference is lvmetad being "active", not just "used".
We already have pv_count to report number of PVs that a VG has based
on metadata.
This patch exposes the information about how many of these PVs are
missing which is also useful information for a VG. Wwe could count
the sum of pv_missing reporting fields for each PV in the VG before,
but the new field is practical when reporting VG as a whole and there's
no need to process each PV from VG alone.
If 'vgcreate --shared' finds both sanlock and dlm are running,
print a more accurate error message:
"Found multiple lock managers, select one with --lock-type."
When neither is running, we still print:
"Failed to detect a running lock manager to select lock type."
Also, leave out the note about "circular buffer" which is
an internal imeplementation detail anyway and not quite
informational for users:
Before this patch:
$ vgcreate vg1 /dev/sda
VG vg1 metadata too large for circular buffer
Failed to write VG vg1.
With this patch applied:
$ vgcreate vg1 /dev/sda
VG vg1 metadata too large: size of metadata to write is 691 bytes while PV metadata area size on /dev/sda is 512 bytes.
Failed to write VG vg1.
Before this patch:
$ lvs -a -o name,layout,role test/lvmlock
LV Layout Role
[lvmlock] linear public
With this patch applied:
$ lvs -a -o name,layout,role test/lvmlock
LV Layout Role
[lvmlock] linear private,lockd,sanlock
Add metadata_devices and seg_metadata_le_ranges report fields.
Currently only defined for raid, but should probably be extended
to all other segment types that don't report all their device
usage in the 'devices' field.
When lvmetad_pvscan_vg() reads VG metadata from each PV,
it compares it to the last one to verify it matches.
If the VG metadata does not match on the PVs, an error
is printed and it fails to read the VG. In this error
case, use log_debug to show the differences between
the two unmatching copies of the metadata.
One host changes a VG, making the cached VG on another
host invalid. The other host then rereads the VG from
disk to get the latest copy. If the first host removed
a PV from the VG, the second host attempts to reread the
VG from old PV when rescanning. Reading the VG from the
removed PV fails, causing vg_read to return "VG not found".
The fix is to simply not fail when a VG is not found while
rereading a PV and continue without it.
(This doesn't happen if the second host happens to first
run a command like 'vgs' that triggers a global revalidation
of metadata.)
vgchange --lock-type iterates through LVs to ensure
no LVs are active before changing the lock type of
the VG, but the loop was not checking that an LV
actually has a lock before trying it, so it would
fail if the VG had any LVs that don't use locks,
e.g it would fail on a tmeta LV from a pool.
When using lvm shell, some structures which are cached in memory may be
reused. This happens for the struct label (a part of lvmcache_info
structure) when lvmetad is used in which case the PV scan is not
done that would normally overwrite these label structures in memory
and making them up-to-date.
This is all consequence of the fact that struct lvmcache_info and
struct label are not always assigned in the same part of the code.
For example, if lvmetad *is not* used, parts of the struct label are
reassigned in label_read fn while struct lvmcache_info is created
elsewhere. No part of the code reused struct label (and its "dev"
field) before calling label_read fn. That's why the real bug is
hidden when using lvm shell without lvmetad.
However, with lvmetad and lvm shell, the situation is a bit different.
The label_read fn is not called if lvmetad *is* used, hence the
struct label may have ended up not initialized properly.
There was missing assignment for the dev field in struct label
in _text_pv_write fn which caused this problem to appear in
lvm shell with lvmetad, for example:
Before this patch:
lvm> pvcreate /dev/sda
Physical volume "/dev/sda" successfully created
lvm> pvs /dev/sda
PV VG Fmt Attr PSize PFree
unknown device lvm2 --- 128.00m 128.00m
With this patch applied:
lvm> pvcreate /dev/sda
Physical volume "/dev/sda" successfully created
lvm> pvs /dev/sda
PV VG Fmt Attr PSize PFree
/dev/sda lvm2 --- 128.00m 128.00m
Also, this problem had not appeared before changes introduced
by commits e1a63905d1 through
3a6f91d713 which, among other
things, added proper label field type reporting. Before, label
reporting was the same as using struct physical_volume which
has its own dev field assigned and so this problem was not exposed.
When a command does a sequence of
vg_write + vg_commit + vg_write + vg_commit,
initialization of non-PV devices happens during the
first vg_write, and does not need to be repeated by
the second vg_write.
When creating a lockd VG, this sequence occurs because
the VG is first created, then the lockd data is created,
then the lockd data is then written to the VG metadata.
This applies the same rule/logic to dlm VGs that has always
existed for sanlock VGs. Allowing a dlm VG to be removed
while its lockspace was still running on other hosts largely
worked, but there were difficult problems if another VG with
the same name was recreated. Forcing the VG lockspace to
be stopped, gives both sanlock and dlm VGs the same behavior.
The code was expecting the wrong return value from
compare_config, which returns 0 when equal.
This is a problem for a lockd VG using multiple PVs
when the VG needs to be rescanned.
Certain stacks of cached LVs may have unexpected consequences.
So add a warning function called when LV is cached to detect
such caces and WARN user about them - the best we could do ATM.
When we insert layer we also move status flag-bits for certain LV types,
so internal volume_group structure remains consistent.
(Perhaps it's misuse of 'insert_layer' function and we should have
another similar function for this.)
Basically we aim to maintain the same state as after reading fresh
metadata out of volume group.
Currently we when i.e. cache 'raid' LV - this should transfer 'raidLV' flag
to _corigin LV and cache is no longer a raid.
TODO: bits for stacked devices needs more exact rules.
Add a new arg to lockd_start_vg() that indicates
it is being called for a new lockd VG, so that
lvmlockd knows the lockspace being started is new.
(Will be used by a following commit.)
Ensure make clean cleans any left-over file from their previous
location so they are not in conflict with new ones.
Also hide error message when .commands file is not present.
The regex filter (controlled by devices/filter lvm.conf setting) was
evaluated as the very last filter. However, this is not optimal when
it comes to restricting disk access - users define devices/filter
as well as devices/global_filter to avoid this.
The devices/global_filter is already positioned at the beginning of the
filter chain. We need to do the same for devices/filter.
Filter chains before this patch:
A: when lvmetad is not used:
persistent_filter -> sysfs_filter -> global_regex_filter ->
type_filter -> usable->filter -> mpath_component_filter ->
partition_filter -> md_component_filter -> fw_raid_filter ->
regex_filter
B: when lvmetad is used:
B1: to update lvmetad:
sysfs_filter -> global_regex_filter -> type_filter ->
usable_filter -> mpath_component_filter -> partition_filter ->
md_component_filter -> fw_raid_filter
B2: to retrieve info from lvmetad:
persistent_filter -> usable_filter -> regex_filter
From the chain list above we can see that particularly in case when
lvmetad is not used, the regex filter is the very last one that is
processed. If lvmetad is used, it doesn't matter much as there's
the global_regex_filter which is used instead when updating lvmetad
and when retrieving info from lvmetad, putting regex_filter in front
of usable_filter wouldn't change much since usabled_filter is not
reading disks directly.
This patch puts the regex filter to the front even in case lvmetad
is not used, hence reinstating the state as it was before commit
a7be3b12df (which moved the regex_filter
position in the chain). Still, the arguments for the commit
a7be3b12df still apply and they're
still satisfied since component filters (MD, mpath...) are evaluated
first just before updating lvmetad.
So with this patch, we end up with:
A: when lvmetad is not used:
persistent_filter -> sysfs_filter -> global_regex_filter ->
regex_filter -> type_filter -> usable->filter ->
mpath_component_filter -> partition_filter ->
md_component_filter -> fw_raid_filter
B: when lvmetad is used:
B1: to update lvmetad:
sysfs_filter -> global_regex_filter -> type_filter ->
usable_filter -> mpath_component_filter -> partition_filter ->
md_component_filter -> fw_raid_filter
B2: to retrieve info from lvmetad:
persistent_filter -> regex_filter -> usable_filter
This way, specifying the regex_filter in non-lvmetad case causes
the devices to be filtered based on regex first before processing
any other filters which can access disks (like md_component_filter).
This patch also streamlines the code for better readability.
Relocate generated configure.h and lvm-version.h outside
of compilable .c source tree.
The reason is behind - when compiling in builddir != srcdir
the generated file in lib/misc/configure.h was used for all compiled
source file except ones located in lib/misc dir - those would have used
configure.h file located in this dir - if there have existed one (i.e.
from some other build)
This problem was only visible, when srcdir == buildir was used before
trying to use srcdri != builddir (as configure.h appeared then in
srcdir).
As part of fix that came with cf700151eb,
I forgot to add the check whether the result of stat was successful or
not. This bug caused uninitialized buffer to be used for entries
from .cache file which are no longer valid.
This bug may have caused these uninitialized values to be used further,
for example (see the unreal (2567,590944) representing major:minor
pair):
$ pvs
/dev/abc: stat failed: No such file or directory
Path /dev/abc no longer valid for device(2567,590944)
PV VG Fmt Attr PSize PFree
/dev/mapper/test lvm2 --- 104.00m 104.00m
/dev/vda2 rhel lvm2 a-- 9.51g 0
Since we may easily get blocked when checking for percentage
of thin-pool - do not flush and just show current values.
This avoids holding VG locked when pool is overfilled.
Try to detect thin-pool which my block lvm2 command from furher
processing (i.e. lvextend).
Check if pool is read-only or out-of-space and in this case thins
will skipped from being scanned (so user may miss some PVs located
on thin volumes).
Fix regression introduced with commit:
2fc126b00d
This commit has moved pv_min_size() test in front
of device_is_usable(). However pv_min_size needs to open device,
so it may have actually get blocked.
So restore the original order and first validate
dm device to be usable for open.
It's worth to note that such check is not 'race-free',
but it usually eliminates 99.99% of problems ;).
Print [source:handler] in filters' debug messages only if external
device info source other than "none" is used.
$ lvmconfig --type full devices/external_device_info_source
external_device_info_source="none
Before this patch (from the -vvvv log):
filters/filter-usable.c:47 /dev/mapper/test: Skipping: Too small to hold a PV [none:(nil)]
filters/filter-md.c:33 /dev/sdb: Skipping md component device [none:(nil)]
filters/filter-partitioned.c:25 /dev/vda: Skipping: Partition table signature found [none:(nil)]
With this patch applied:
filters/filter-usable.c:44 /dev/mapper/test: Skipping: Too small to hold a PV
filters/filter-md.c:35 /dev/sdb: Skipping md component device
filters/filter-partitioned.c:27 /dev/vda: Skipping: Partition table signature found
This was only used to return two flags indicating specific
reasons for a lock failure so that a more specific error
message could be printed by the command (lockspace had been
stopped, or lockspace had an error starting.)
Remove the list, given its limited usefulness, the fact it
would easily become inaccurate, and the fact it was causing
misleading error messages. The error conditions it was meant
to help could be reported differently.
Previously, a command would only rescan a lockd VG
when lvmetad returned the "vg_invalid" flag indicating
that the cached copy was invalid (which is done by
lvmlockd.) This is still the only usual reason for
rescanning a lockd VG, but two new special cases are
added where we also do the rescan:
. When the --shared option is used to display lockd VGs
from hosts not using lvmlockd. This is the same case
as using --foreign to display foreign VGs, but --shared
was missing the corresponding bits to rescan the VGs.
. When a lockd VG is allowed to be read for displaying
after failing to acquire the lock from lvmlockd. In
this case, the usual mechanism for validating the
cache is missed, so assume the cache would have been
invalidated. (This had been a previous todo item
that was lost during other cleanup.)
These were long-standing todos that were lost track of.
This makes lvmlockd removal steps for dlm VGs closely match
sanlock VGs. Because dlm lockspaces are not required to be
stopped on all hosts before vgremove, there is an extra bit
for dlm lockspaces, where a flag is set in the VG lock lvb
indicating that the VG was removed. If other hosts happen
to use the VG lock they will see this flag and stop their
lockspace.
Remove the existing lock type using the same functions
used to remove the lockd components during vgremove.
This results in a "clean" VG and lvmlockd state after
the vgchange, i.e. no bits left over from previous
lock type.
Since cache-pool actualy keeps info about caching,
display this info for cache-pool LV as well
(matches info for cache LV when cache-pool is asociated with it).
Fix the version export macros to make it possible to export two
different DM_* versions of a symbol: currently it is only possible for a
DM_* symbol to override a symbol in Base. Attempting to export two
symbols at different DM_* version levels (e.g. DM_1_02_104 and
DM_1_02_106) leads to a linker error due to a duplicate symbol
definition.
This is because the DM_EXPORTED_SYMBOL macro makes each exported symbol
the default (@@VERSION):
__asm__(".symver " #func "_v" #ver ", " #func "@@DM_" #ver )
Fix the macro to use a single '@' for a symbols exported in multiple
versions and rename the macros to DM_EXPORT_*:
DM_EXPORT_SYMBOL(func,ver)
DM_EXPORT_SYMBOL_BASE(func,ver)
For functions that have multiple implementations these macros control
symbol export and versioning.
Function definitions that exist in only one version never need to use
these macros.
Backwards compatible implementations must include a version tag of
the form "_v1_02_104" as a suffix to the function name and use the
macro DM_EXPORT_SYMBOL to export the function and bind it to the
specified version string.
Since versioning is only available when compiling with GCC the entire
compatibility version should be enclosed in '#if defined(__GNUC__)',
for example:
int dm_foo(int bar)
{
return bar;
}
#if defined(__GNUC__)
// Backward compatible dm_foo() version 1.02.104
int dm_foo_v1_02_104(void);
int dm_foo_v1_02_104(void)
{
return 0;
}
DM_EXPORT_SYMBOL(dm_foo,1_02_104)
#endif
A prototype for the compatibility version is required as these
functions must not be declared static.
The DM_EXPORT_SYMBOL_BASE macro is only used to export the base
versions of library symbols prior to the introduction of symbol
versioning: it must never be used for new symbols.
This mainly makes the description text use 80 columns.
There are a few minor adjustments to wording to help
the text layout, and a couple minor improvements to
descriptions.
This reverts commit 70db1d523d.
Since we use 'strncpy' even for case where it exactly matches
the buffer size and \0 is not expected to be added there.
Before printing a commented automatic config value,
print a line describing what it is. Otherwise, the
commented value can look like it's a part of an
example preceding it.
Move code which runtime detects settings for cache_policy
out of config dir to cache seg handling code.
Also mark cache_mode as command profilable setting.
Revert back to already existing behavior which has been slightly
modified by a900d150e4.
At the end however it seem to be equal to change TID right with first
metadata write.
Existing code missed handling for 'unused' thin-pool which would
require to also check empty message list for TID==0.
So with the fix we now again preserve 'active' thin-pool volume
when first thin volume is created - this property was lost and caused
problems in cluster, where the lock was hold, but volume was no longer
active on the node.
Another missing part was the proper support for already increased,
but unfinished TID change.
So going back here with existing logic -
TID is increased with first MDA update.
Code allows start with either same TID or (TID-1).
If there are messages, TID must be lower by 1 for sending,
otherwise messages were already posted.
As cache_policy is evaluated in runtime, we no longer should use
CFG_COMMENTED, but have to switch to CFG_UNDEFINED.
So as long as the value is undefined, it's runtime evaluated.
Once it's set - it's always respected (no runtime fallback).
Also fix version of introduced settings to 2.2.128.
If the Linux timerfd interface to POSIX timers is available at compile
time use it for all report interval timekeeping. This gives more
accurate interval timing when the per-interval processing time is less
than the configured interval and simplifies the timestamp bookkeeping
required to keep accurate time.
For systems without timerfd support fall back to the simple usleep based
timer.
Change logic and naming of some internal API functions.
cache_set_mode() and cache_set_policy() both take segment.
cache mode is now correctly 'masked-in'.
If the passed segment is 'cache' segment - it will automatically
try to find 'defaults' according to profiles if the are NOT
specified on command line or they are NOT already set for cache-pool.
These defaults are never set for cache-pool.
Add code to detect available cache features.
Support policy_mq & policy_smq features which might be disabled.
Introduce global_cache_disabled_features_CFG.
Add new profilable configurables:
allocation/cache_policy
allocation/cache_settings
and mark allocation/cache_pool_chunk_size as profilable as well.
Obsolete allocation/cache_pool_cachemode and
introduce new allocation/cache_mode instead.
Rename DEFAULT_CACHE_POOL_POLICY to DEFAULT_CACHE_POLICY.
lvrename should not be done if the LV is active on another host.
This check was mistakenly removed when the code was changed to
use LV uuids in locks rather than LV names.
When vgremove is used to remove multiple VGs in one command,
e.g. vgremove foo bar, the first VG (foo) that is removed
may have held the sanlock global lock. In this case,
do not continue removing further VGs (bar) without the
global lock.
This adds the infrastructure, code paths, error reporting,
etc. to handle storage errors, or storage loss, under the
sanlock leases in a VG that is being used. The loss of
storage means sanlock cannot renew its leases, which means
that the host needs to stop using the shared VG before its
leases expire.
This still requires manually shutting down a VG that has
lost lease storage, e.g. unmounting file systems,
deactivating LVs in the VG. The next step is to
automatically use a command like blkdeactivate to do that.
/lib/log/log.c:88: warning[invalidScanfArgType_int]: %llu in format string (no. 2) requires 'unsigned long long *' but the argument type is 'long long *'.
daemons/lvmlockd/lvmlockd-core.c:791: error[uninitstring]: Dangerous usage of 'version' (strncpy doesn't always null-terminate it).
Use refresh_filters instead of destroy_filters and init_filters
in refresh_toolcontext fn which deals with cmd->initialized.filters
correctly on refresh.
Just shuffle the items and put them into logical groups so it's
visible at first sight what each group contains - it makes it a bit
easier to make heads and tails of the whole cmd_context monster.
When a command is flagged with NO_METADATA_PROCESSING flag, it means
such command does not process any metadata and hence it doens't require
lvmetad, lvmpolld and it can get away with no locking too. These are
mostly simple commands (like lvmconfig/dumpconfig, version, types,
segtypes and other builtin commands that do not process metadata
in any way).
At first, when lvm command is executed, create toolcontext without
initializing connections (lvmetad,lvmpolld) and without initializing
filters (which depend on connections init). Instead, delay this
initialization until we know we need this. That is, until the
lvm_run_command fn is called in which we know what the actual
command to run is and hence we can avoid any connection, filter
or locking initiliazation for commands that would not make use
of it anyway.
For all the other create_toolcontext calls, we keep the original
behaviour - the filters and connections are initialized together
with the toolcontext.
Make it possible to decide whether we want to initialize connections and
filters together with toolcontext creation.
Add "filters" and "connections" fields to struct
cmd_context_initialized_parts and set these in cmd_context.initialized
instance accordingly.
(For now, all create_toolcontext calls do initialize connections and
filters, we'll change that in subsequent patch appropriately.)
Move original lvmetad and lvmpolld initialization code from
_process_config fn to their own functions _init_lvmetad and
_init_lvmpolld (both covered with single _init_connections fn).
Add struct cmd_context_initialized_parts to wrap up information
about which cmd context pieces are initialized and add variable
of this struct type into struct cmd_context.
Also, move existing "config_initialized" variable that was directly
part of cmd_context into the new cmd_context.initialized wrapper.
We'll be adding more items into the struct cmd_context_initialized_parts
with subsequent patches...
This tries harder to avoid creating duplicate global locks in
sanlock VGs by refusing to create a new sanlock VG with a
global lock if other sanlock VGs exist that may have a gl.
vgsummary information contains provisional VG information
that is obtained without holding the VG lock. This info
can be used to lock the VG, and then read it with vg_read().
After the VG is read properly, the vgsummary info should
be verified.
Add the VG lock_type to the vgsummary. It needs to be
known before the VG can be locked and read.
This is a regression introduced by commit
6c0e44d5a2 which changed
the way dev_cache_get fn works - before this patch, when a
device was not found, it fired a full rescan to correct the
cache. However, the change coming with that commit missed
this full_rescan call, causing the lvmcache to still contain
info about PVs which should be filtered now.
Such situation may have happened by coincidence of using
old persistent cache (/etc/lvm/cache/.cache) which does not
reflect the actual state anymore, a device name/symlink which
now points to a device which should be filtered and a fact we
keep info about usable DM devices in .cache no matter what
the filter setting is.
This bug could be hidden though by changes introduced in
commit f1a000a477 as it
calls full_rescan earlier before this problem is hit.
But we need to fix this anyway for the dev_cache_get
to be correct if we happen to use the same code path
again somewhere sometime.
For example, simple reproducer was (before commit
1a000a477558e157532d5f2cd2f9c9139d4f87c):
- /dev/sda contains a PV header with UUID y5PzRD-RBAv-7sBx-V3SP-vDmy-DeSq-GUh65M
- lvm.conf: filter = [ "r|.*|" ]
- rm -f .cache (to start with clean state)
- dmsetup create test --table "0 8388608 linear /dev/sda 0" (8388608 is
just the size of the /dev/sda device I use in the reproducer)
- pvs (this will create .cache file which contains
"/dev/disk/by-id/lvm-pv-uuid-y5PzRD-RBAv-7sBx-V3SP-vDmy-DeSq-GUh65M"
as well as "/dev/mapper/test" and the target node "/dev/dm-1" - all the
usable DM mappings (and their symlinks) get into the .cache file even
though the filter "is set to "ignore all" - we do this - so far it's OK)
- dmsetup remove test (so we end up with /dev/disk/by-id/lvm-pv-uuid-...
pointing to the /dev/sda now since it's the underlying device
containing the actual PV header)
- now calling "pvs" with such .cache file and we get:
$ pvs
PV VG Fmt Attr PSize PFree
/dev/disk/by-id/lvm-pv-uuid-y5PzRD-RBAv-7sBx-V3SP-vDmy-DeSq-GUh65M vg lvm2 a-- 4.00g 0
Even though we have set filter = [ "r|.*|" ] in the lvm.conf file!
Moved out from lib/display and a little documentation added.
It's tuned to LVM's requirements historically and its behaviour
might not always be what you would expect.
There is no longer an "enable" option for the global lock,
so remove the bit of code that was checking for it. It
was an optional variation anyway, and not one that was likely
to be used.
Also update the corresponding comment describing global lock
creation.
pvscan autoactivation does not work for lockd VGs because
lock start is needed on a lockd VG before locking can be
done for it. Add a check to skip the attempt at autoactivate
rather than calling it, knowing it will fail.
Add a comment explaining why pvscan --cache works fine for
lockd VGs without locks, and why autoactivate is not done.
The CFG_SECTION_NO_CHECK flag can be used to mark a section
and its whole subtree as containing settings where checks
won't be made (lvmconfig --validate).
These are setting where we don't know the names and and type
in advance and they're recognized in runtime. As we don't know
the type and name in advance, we can't do any checks here
of course.
Use this flag with great care as it disables config checks
for the whole config subtree found under such section.
This flag is going to be used by subsequent patches from
Zdenek to support some cache settings...
Comply with the rules we have for log_error and log_warn...
$ pvcreate /dev/sda1
Failed to get offset of the xfs_external_log signature on /dev/sda1.
1 existing signature left on the device.
Aborting pvcreate on /dev/sda1.
$ pvcreate /dev/sda1 --force
WARNING: Failed to get offset of the xfs_external_log signature on /dev/sda1.
Physical volume "/dev/sda1" successfully created
libblkid may return the list of signatures found, but it may not
provide offset and size for each signature detected. This may
happen in case signatures are mixed up or there are more, possibly
overlapping, signatures found.
Make lvm commands pass if such situation happens and we're using
--force (or any stronger force method).
For example:
$ pvcreate /dev/sda1
Failed to get offset of the xfs_external_log signature on /dev/sda1.
1 existing signature left on the device.
Aborting pvcreate on /dev/sda1.
$ pvcreate --force /dev/sda1
Failed to get offset of the xfs_external_log signature on /dev/sda1.
Physical volume "/dev/sda1" successfully created
The vgchange/lvchange activation commands read the VG, and
don't write it, so they acquire a shared VG lock from lvmlockd.
When other commands fail to acquire a shared VG lock from
lvmlockd, a warning is printed and they continue without it.
(Without it, the VG metadata they display from lvmetad may
not be up to date.)
vgchange/lvchange -a shouldn't continue without the shared
lock for a couple reasons:
. Usually they will just continue on and fail to acquire the
LV locks for activation, so continuing is pointless.
. More importantly, without the sh VG lock, the VG metadata
used by the command may be stale, and the LV locks shown
in the VG metadata may no longer be current. In the
case of sanlock, this would result in odd, unpredictable
errors when lvmlockd doesn't find the expected lock on
disk. In the case of dlm, the invalid LV lock could be
granted for the non-existing LV.
The solution is to not continue after the shared lock fails,
in the same way that a command fails if an exclusive lock fails.
When lvmlockd is compiled without support for one of the
lock managers (sanlock or dlm), and a command tries to use
one of them, explain that in the error message.
When lvm is built without lvmlockd support, vgcreate using a
shared lock type would succeed and create a local VG (the
--shared option was effectively ignored). Make it fail.
Fix the same issue when using vgchange to change a VG to a
shared lock type.
Make the error messages consistent.
A segfault was reported when extending an LV with a smaller number of
stripes than originally used. Under unusual circumstances, the cling
detection code could successfully find a match against the excess
stripe positions and think it had finished prematurely leading to an
allocation being pursued with a length of zero.
Rename ix_offset to num_positional_areas and move it to struct
alloc_state so that _is_condition() can obtain access to it.
In _is_condition(), areas_size can no longer be assumed to match the
number of positional slots being filled so check this newly-exposed
num_positional_areas directly instead. If the slot is outside the
range we are trying to fill, just ignore the match for now.
(Also note that the code still only performs cling detection against
the first segment of the LV.)
Replace misleading "not found" in the log message when
devices/preferred_names is set to empty array:
Really not found:
device/dev-cache.c:689 devices/preferred_names not found in config: using built-in preferences
Found, but empty:
config/config.c:1431 Setting devices/preferred_names to preferred_names = [ ]
device/dev-cache.c:689 devices/preferred_names is empty: using built-in preferences
Commit 7e728fe1a1 added a log call
directly in find_config_tree_array when defaults are used.
This patch also adds the log for the value which is found in
existing configuration and for which defaults are not used.
For example:
Defaults used:
config/config.c:1428 devices/scan not found in config: defaulting to scan = [ "/dev" ]
Value defined in configuration used:
config/config.c:1431 Setting devices/scan to scan = [ "/dev", "/mydev", "/abc" ]
This makes the logging consistent with the other find_config_tree_* functions.
Policy name has to be always defined.
Capture it as an internal error before write.
When reading metadata without defined policy name, use default defined policy.
TODO: Unsure, but it might have to be actually always 'mq' in this case.
Keep policy name separate from policy settings and avoid
to mangling and demangling this string from same config tree.
Ensure policy_name is always defined.
Use find_config_tree_array for all config arrays. Also, add
INTERNAL_ERROR in case there should have been at least default
value defined for a setting but it was not returned for some
reason (either config_settings.h misconfiguration or other config
tree error printed by functions called by find_config_tree_array).
There are two different failure conditions detected in
access_vg_lock_type() that should have different error
messages. This adds another failure flag so the two
cases can be distinguished to avoid printing a misleading
error message.
Require global/{thin,cache}_{check,repair}_options to be always defined.
If not defined directly by user in the configuration and if there's no
concrete default option to use, make "" (empty string) the default one -
it's then clearly visible in the "lvmconfig --type default" (and
generated lvm.conf) and also it makes its handling in the code more
straightforward so we don't need to handle undefined values.
This means, if there are no default values for these settings defined,
we end up with this generated now:
{thin,cache}_{check,repair}_options = [ "" ]
So the value is never undefined and if it is, it's an error.
(The cache_repair_options is actually not used in the code at the moment,
but once the code using this setting is in, it will follow the same logic
as used for thin_repair_options.)
When --nolocking is used (by vgs, lvs, pvs):
. don't use lvmlockd at all (set use_lvmlockd to 0)
. allow lockd VGs to be read
When --readonly is used (by vgs, lvs, pvs, vgdisplay, lvdisplay,
pvdisplay, lvmdiskscan, lvscan, pvscan, vgcfgbackup):
. skip actual lvmlockd locking calls
. allow lockd VGs to be read
. check that only shared gl/vg locks are being requested
(even though the actually locking is being skipped)
. check that no LV locks are requested, because no LVs
should be activated or used in readonly mode
. disable using lvmetad so VGs are read from disk
It is important to note the limited commands that accept
the --nolocking and --readonly options, i.e. no commands
that change/write a VG or change/activate LVs accept these
options, only commands that read VGs.
There are at least a couple instances where
the lock_args check does not work correctly,
(listed in the comment), so disable the
NULL check for lock_args until those are
resolved.
log_warn was added recently because no known code used
the given condition, but running pvcreate on an existing
PV uses this case, and should not produce a warning.
Put the change from commit #10d27998b3d2f6100e9e29e83d1d99948c55875f
back so we have working tree again for now. This code needs a bit of
a cleanup to return proper return value to check...
lib/format1/import-export.c:167: var_deref_op: Dereferencing null pointer "vg->lvm1_system_id"
lib/cache/lvmetad.c:1023: var_deref_op: Dereferencing null pointer "this"
daemons/lvmlockd/lvmlockd-core.c:2659: check_after_deref: Null-checking "act" suggests that it may be null, but it has already been dereferenced on all paths leading to the check
/daemons/lvmetad/lvmetad-core.c:1024: check_after_deref: Null-checking "pvmeta" suggests that it may be null, but it has already been dereferenced on all paths leading to the check
