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Adding the ability to get the seqno is important for an application to
determine if something has changed in a VG. Otherwise, the only way to
know is to open the VG with write permission and hold the handle.
For now, liblvm will return -1 (fail) / 0 (success) or
NULL (fail) / non-NULL (success). Upon failure, lvm_errno and
lvm_errmsg should be used to determine the precise error.
Author: Dave Wysochanski <dwysocha@redhat.com>
Reverts some of my 'cleanup' from last night. For now we will use pass/fail
on API calls (either 'int' return or NULL/non-NULL handle), then use
lvm_errno() to get more specific errors.
Author: Dave Wysochanski <dwysocha@redhat.com>
Use const and PRIu64.
Signed-off-by: Thomas Woerner <twoerner@redhat.com>
Signed-off-by: Dave Wysochanski <dwysocha@redhat.com>
Author: Thomas Woerner <twoerner@redhat.com>
Committer: Dave Wysochanski <dwysocha@redhat.com>
liblvm unit test case uses the following APIs:
- lvm_create, lvm_destroy
- lvm_vg_create, lvm_vg_extend, lvm_vg_set_extent_size, lvm_vg_write,
lvm_vg_remove, lvm_vg_close
Signed-off-by: Dave Wysochanski <dwysocha@redhat.com>
Acked-by: Alasdair G Kergon <agk@redhat.com>
Update units_to_bytes() to support (S)ectors: 500 bytes.
- 500 byte (S)ectors is of questionable value but it adds to consistency
if a user happens to use --units S. This seems better than an error.
Updated test/t-covercmd.sh to test --units [hS]
Document the units that can be displayed via --units uniformly.
- (p)etabytes and (e)xabytes were missing in pvs, vgs and lvs man pages.
Made lvreduce man page "... in units of megabytes." consistent (with the
lvextend and lvresize man pages).
- PPC uses 64k page, some caculations are wrong in tests
- file utility is buggy on PPC and cannot detect swap, use blkid instead
- read ahead is quietly rounded down according to page size
(for now use some common divisor value in test)
Several commands calls process_each_vg() and in provided
callback it explicitly recovers VG if inconsistent.
(vgchange, vgconvert, vgscan)
It means that old VG is released and reread but the function
above (process_one_vg) tries to unlock and release old VG.
Patch moves the repair logic into _process_one_vg() function.
It always tries to read vg (even inconsistent) and then decides
what to do according new defined parameter.
Also patch unifies inconsistent error messages.
The only slight change if for vgremove command, where
it now tries to repair VG before it removes if force arg is given.
(It works similar way before, just the order of operation changed).
When mirror convert polling is started (mainly as backgound process,
in lvchange -a y or in lvconvert itself) it tries to read VG
and LV identified by its name.
Unfortunatelly, the VG can have already different LV under the same name,
and various more or less funny things can happen (note that
_finish_lvconvert_mirror suspends the volume for example).
(the typical example is our testing script which continuously recreates
LVs under the same name in the same VG.)
This patch adds optional uuid parameter which helps to properly
select the monitoring object. For lvconvert polling it is set to LV UUID
and both _get_lvconvert_vg and _get_lvconvert_lv uses it to read proper VG/LV.
(In the pvmove case it is NULL, here we poll for physical volume name).
When we are stacking LV over device, which has for some reason
increased read_ahead (e.g. MD RAID), the read_ahead hint
for libdevmapper is wrong (it is zero).
If the calculated read_ahead hint is zero, patch uses read_ahead of underlying device
(if first segment is PV) when setting DM_READ_AHEAD_MINIMUM_FLAG.
Because we are using dev-cache, it also store this value to cache for future use
(if several LVs are over one PV, BLKRAGET is called only once for underlying device.)
This should fix all the reamining problems with readahead mismatch reported
for DM over MD configurations (and similar cases).
pvmove now keep suspended devices if temporary mirror creation fails.
We can try to restore previous state if it is first attempt to activate
pvmove (code basically run the same code as --abort automatically).
Currently code uses pv_dev_name() for hash when getting internal
"pvX" name.
This produce corrupted metadata if PVs are missing, pv->dev
is NULL and all these missing devices returns one name
(using "unknown device" for all missing devices as hash key).
We can temporarily violate max_lv during mirror conversion etc.
(If the operation fails, orphan mirror images are visible to administrator
for manual remove for example. Not that this should ever happen:-)
Force limit only for lvcreate (and vg merge) command.
Patch also adds simple max_lv tests into testsuite
The dataalign value must always be aligned according
to MDA area.
The currect code checks if calculated value collides with
MDA area but not if the value is so small that it is
located before MDA starts.
Unfortunatelly there can be also MDA in the end of the device.
The patch adds simple check to avoid this miscalculation.
Patch expects that first MDA always starts on <= pagesize boundary
(this is true for all allowed label sector parameters).
If user requests report attribute from PVSEG type
and PV is orphan (or all devices is set), the report
is empty.
Try for example (when only orphan PV are present)
#pvs
#pvs -o +devices
# pvs /dev/sdb1
PV VG Fmt Attr PSize PFree
/dev/sdb1 lvm2 -- 46.58G 46.58G
# pvs -o +devices /dev/sdb1
(no output)
The problem is caused by empty pv->segments list.
Fix it by providing fake segment here (similar to fake structures
in _pvsegs_sub_single() calls.
By gnu coding stds, 'distclean' should remove all files generated
by ./configure in addition to what 'clean' does.
Author: Takahiro Yasui <tyasui@redhat.com>
Patch fixes these problems:
- during the snapshot creation process, it needs create 2 LVs,
one is cow, second becomes snapshot.
If the code fails in vg_add_snapshot, code lvcreate will not remove
LV cow volume.
- if max_lv is set and VG contains snapshot, it can happen that
during the activation lv_count is temporarily increased over the limit
and VG metadata are not properly processed
see https://bugzilla.redhat.com/show_bug.cgi?id=490298
- vgcfgrestore alows restore with max_lv set to lower valuer that actual
LV count. This later leads to situation that max_lv is completely ignored.
- vgck doesn't call vg_validate(). It should at least try:-)
Signed-off-by: Milan Broz <mbroz@redhat.com>
New structure lvm (used as an alias to cmd_context), new type definition lvm_t
for the lvm handle. Added functions lvm_create, lvm_destroy and
lvm_reload_config using the new handle.
Modified test/api/test.c:
Use new lvm.h header file and lvm_t handle.
Removed lib/lvm2.h
Author: Thomas Woerner <twoerner@redhat.com>
This patch is not fully tested and leaves some related bugs unfixed.
Intended behaviour of the code now:
pe_start in the lvm2 format PV label header is set only by pvcreate (or
vgconvert -M2) and then preserved in *all* operations thereafter.
In some specialist cases, after the PV is added to a VG, the pe_start
field in the VG metadata may hold a different value and if so, it
overrides the other one for as long as the PV is in such a VG.
Currently, the field storing the size of the data area in the PV label
header always holds 0. As it only has meaning in the context of a
volume group, it is calculated whenever the PV is added to a VG (and can
be derived from extent_size and pe_count in the VG metadata).
"test" never prints anything. Therefore, "return $(test ...)" is equivalent to
just "return;" which means success in sh (same as return 0). We can however,
thanks to set -e, use "test foo = bar" as an assertion.
PS: test a == b is invalid syntax. It is either = or -eq: = is textual and -eq
is numeric comparison.
for losetup, break out of the loop when successful setup of loop device,
and only look at 7 loop devices (default loop module setting)
for blockdev, use old option if new one is not available
- add lvcreate rejects repeated invocation test
- fix pvs metadata test for partial failure test
- add pvchange reject --addtag to lvm1 pv test
(All fixes by Jaroslav Stava)
Original code would create "*.so" symbolic links if there were no actual
files ending in "so". The second iteration would then cause an error
in the test logs.
