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Commit Graph

1093 Commits

Author SHA1 Message Date
Mike Snitzer
fc0f2d5031 Prompt if request is made to remove a snapshot whose "Merge failed". 2012-01-20 22:04:16 +00:00
Mike Snitzer
27e21a4adc Allow removal of an invalid snapshot that was to be merged on next activation.
Don't allow a user to merge an invalid snapshot.
2012-01-20 22:03:48 +00:00
Mike Snitzer
d658922f36 Use m and M lv_attr to indicate that a snapshot merge failed in lvs.
snapshot (m)erge failed, suspended snapshot (M)erge failed
2012-01-20 22:03:03 +00:00
Zdenek Kabelac
6515946e4d Thin cleanup
Reorder condition so the code is better readable (and shorter).
2012-01-20 10:56:30 +00:00
Zdenek Kabelac
f881095a69 Drop hack in segtype reporting
Since striped name function knows when to report 'linear' instead of
'stripe' type name - drop it from this place.

This fixes problem when reporting segtype e.g. for thin-pool which
is also using area_count=1 to store thin data device reference.

It also returns properly strduped memory instead of badly casted const char*.
2012-01-20 10:55:28 +00:00
Zdenek Kabelac
f82bddb76c Thin disable snapshot creation when pool is over the threshold.
Since snapshot needs to suspend origin - it might lead to pool userspace
deadlock (as the pool will wait for new space in case it would be overfilled,
but dmeventd would not be able to resize it, as the lvcreate operation would
have kept the VG lock.)
To minimize the risk of such scenario - we prevent to create new snapshot
in case we are over the threshold - but beware, there is still small timewindow,
so keep threshold at some reasonable level!
2012-01-19 15:39:41 +00:00
Zdenek Kabelac
e58b5dd8e8 Thin add new display field for lvs
New field Data% is able to display info about
thin_pool, thin, snapshot and has generic meaning here.

Simple Time/Host field are here to display host and time creation.
2012-01-19 15:34:32 +00:00
Zdenek Kabelac
53d7985fa1 Add support to keep info about creation time and host for each LV
Basic support to keep info when the LV was created.
Host and time is stored into LV mda section.

FIXME: Current version doesn't support configurable string via lvm.conf
and used fixed version strftime "%Y-%m-%d %T %z".
2012-01-19 15:31:45 +00:00
Zdenek Kabelac
d8106dfee2 Thin rename seg var pool_metadata_lv to metadata_lv
Better fits the code.
2012-01-19 15:23:50 +00:00
Alasdair Kergon
8f95d94b4f Show read-only activation in display tools. 2012-01-12 16:58:43 +00:00
Zdenek Kabelac
f582793f1b Thin rename internal thin pool segment
Use matching name as kernel target - useful when function like
_percent is using this for validation.
2011-12-21 12:54:19 +00:00
Alasdair Kergon
66e5b7f53c Reinstate support for format1 snapshots, but issue deprecated warning.
I anticipate removing support for snapshots with lvm1-formatted metadata in a
future release.
2011-12-20 00:02:18 +00:00
Alasdair Kergon
289ed221d0 update FIXMEs 2011-12-10 00:47:23 +00:00
Jonathan Earl Brassow
9711057499 Don't allow two images to be split and tracked from a RAID LV at one time
Also, don't allow a splitmirror operation on a RAID LV that is already tracking
a split, unless the operation is to stop the tracking and complete the split.
Example:
~> lvconvert --splitmirrors 1 --trackchanges vg/lv /dev/sdc1
# Now tracking changes - image can be merged back or split-off for good
~> lvconvert --splitmirrors 1 -n new_name vg/lv /dev/sdc1
# ^ Completes split ^

If a split is performed on a RAID that is tracking an already split image and
PVs are provided, we must ensure that
 1) the already split LV is represented in the PVs
 2) we are careful to split only the tracked image
2011-12-01 00:21:04 +00:00
Jonathan Earl Brassow
a927e401f1 Do not allow users to change the name of RAID sub-LVs or the name of the
RAID LV if it is tracking changes for a split image.
2011-12-01 00:09:34 +00:00
Jonathan Earl Brassow
2ba1e8fccc The LV_REBUILD flag is not internal - bad comments in metadata-exported.h updated 2011-11-30 02:20:13 +00:00
Jonathan Earl Brassow
0c506d9a40 Support the ability to replace specific devices in a RAID array.
RAID is not like traditional LVM mirroring.  LVM mirroring required failed
devices to be removed or the logical volume would simply hang.  RAID arrays can
keep on running with failed devices.  In fact, for RAID types other than RAID1,
removing a device would mean substituting an error target or converting to a
lower level RAID (e.g. RAID6 -> RAID5, or RAID4/5 to RAID0).  Therefore, rather
than removing a failed device unconditionally and potentially allocating a
replacement, RAID allows the user to "replace" a device with a new one.  This
approach is a 1-step solution vs the current 2-step solution.

example> lvconvert --replace <dev_to_remove> vg/lv [possible_replacement_PVs]

'--replace' can be specified more than once.

example> lvconvert --replace /dev/sdb1 --replace /dev/sdc1 vg/lv
2011-11-30 02:02:10 +00:00
Zdenek Kabelac
900f5f8187 Replace dynamic buffer allocations for PATH_MAX
Use static buffer instead of stack allocated buffer.
This reduces stack size usage of lvm tool and the
change is very simple.

Since the whole library is not thread safe - it should not
add any new problems - and if there will be some conversion
it's easy to convert this to use some preallocated buffer.
2011-11-18 19:31:09 +00:00
Zdenek Kabelac
8deeeb07ea Unlock memory for vg_write
For write we do not need to hold memory locked.
This relaxes many conditions and avoid problems when allocating
a lot of memory for writting metadata buffers.
(In case of huge MDA size this would lead to mismatch between
locked and unlocked memory region size).

Add also internal check we are not writing in critical section.
2011-11-18 19:28:00 +00:00
Zdenek Kabelac
37f274ced9 Query before removing inactive snapshots
Removal of an inactive origin removes also all related snapshots.

When we now support 'old' external snapshots with thin volumes,
removal of pool will not only drop all thin volumes, but as
a consequence also all snapshots - which might be seen a bit
unexpected for the user - so add a query to confirm such action.

lvremove -f will skip the prompt.
2011-11-18 19:25:20 +00:00
Zdenek Kabelac
91e4512619 Adjusted mirror region size only for mirrors and raids
Update region_size only for mirror and raid targets.
This fixes warning messages when vg is using small
extent size like 1KiB and no mirror/raid is created,
but the user still got the message:

$> vgcreate -s 1K vg  <pvs>
$> lvcreate -L10K vg
Using reduced mirror region size of 4 sectors
2011-11-15 17:32:12 +00:00
Zdenek Kabelac
5f129d15b1 Thin update prompt message
Enhance message with info about how many thin volumes are going to
be removed with thin pool removal.
2011-11-15 17:29:52 +00:00
Zdenek Kabelac
8542953f74 Reorder AND test condition
Take the easiest condition for checking first since they must
apply all together, check local conditions first before doing
more expensive tests.
2011-11-15 17:27:41 +00:00
Zdenek Kabelac
25de8ca372 Thin supports only thin volumes as snapshot origins
It's currently of the scope to properly solve the snapshoting
of internal thin devs so prevent non-toplevel snapshots here.
2011-11-15 17:23:51 +00:00
Zdenek Kabelac
dd0c58c69b Add missing stack reporting
also remove unneeded {}
2011-11-12 22:53:23 +00:00
Zdenek Kabelac
3af072cc63 Thin use items iterator and stack reporting 2011-11-12 22:52:18 +00:00
Zdenek Kabelac
651ef6be82 Missing stack printing 2011-11-12 22:51:20 +00:00
Zdenek Kabelac
6e89eb9a52 Small comment and indent updates 2011-11-10 12:43:05 +00:00
Zdenek Kabelac
f201498f99 Thin test min thin_pool size for at least 1 chunk 2011-11-10 12:42:36 +00:00
Zdenek Kabelac
39fc633957 Thin align volume size on chunk boundary size
If the extent_size is smaller then the chunk_size we may try
to find better aligment (wasting less space).

i.e. using  4KB extent_size and  64KB chunk size will
lead to creation of 64KB aligned thin volume.
2011-11-10 12:42:15 +00:00
Zdenek Kabelac
74e53e8bc0 Thin disable pool create without activation 2011-11-10 12:39:01 +00:00
Alasdair Kergon
3da4ed712e Must not override alloc policy specified by user. 2011-11-07 13:54:54 +00:00
Zdenek Kabelac
65e88e6b3c Thin add error message for double delete
Add few more internal error messages.
2011-11-07 11:04:45 +00:00
Zdenek Kabelac
97d7e5aedb Thin supports snapshots
Full support for thin snapshots.
Create and remove is supported.

TODO: lvconvert support is not yes available.
2011-11-07 11:03:47 +00:00
Zdenek Kabelac
11721819a7 Thin reindent code
Drop indention level
Add extra internal error.
2011-11-07 10:59:07 +00:00
Zdenek Kabelac
87371d48cc Thin revert code for exclusive pool activation
There are no limits on thin-pool activation now.
Revert code that is no longer needed.
2011-11-07 10:58:13 +00:00
Zdenek Kabelac
4079a8f298 Avoid lvextend to overflow
Add extra check to extent_count overflow.
Use internal define MAX_EXTENT_COUNT instead UINT32_MAX.
2011-11-04 22:49:53 +00:00
Zdenek Kabelac
83baa0b778 Thin pool allocation simplified
Support allocation of metadata from the same PV, if the VG
is build only from one PV.

As thinp is not mirror - we do not require 2 PVs
for basic thin usage as user is losing only perfomance.
2011-11-04 22:45:52 +00:00
Zdenek Kabelac
bd15208cd7 Thin add thin_pool_metadata_require_separate_pvs
Allow to set different policy for pool from mirrors.
2011-11-04 22:44:21 +00:00
Zdenek Kabelac
b8cac455bd Thin supports poolmetadatasize setting
Add option to set pool metadatasize.
For passing size parameter reuse region_size.
2011-11-04 22:43:10 +00:00
Alasdair Kergon
13dc67cda7 Add missing lvrename mirrored log recursion in for_each_sub_lv. 2011-11-04 01:31:23 +00:00
Zdenek Kabelac
1cae10a36c Thin keep pool device in the same state
Leave the optimalisation to be done differently and preserve
availability state of the pool device.
2011-11-03 15:58:20 +00:00
Zdenek Kabelac
9aa24bd034 Thin no device is created - so nothing to revert here 2011-11-03 15:46:51 +00:00
Zdenek Kabelac
466a8ebf9d Thin removing unused detach_pool_messages 2011-11-03 14:57:04 +00:00
Zdenek Kabelac
92384bfd0b Thin using update_pool_lv
Replace detach_pool_messages with update_pool_lv.
Move creation code from to 'if' condition into 1.
Ensure creation has finished all previous message operations.
2011-11-03 14:56:20 +00:00
Zdenek Kabelac
73b7bf961b Thin genering update_pool_lv function
Function to trigger pool message passing via resume,
or resize of the pool itself independently on other thins.
2011-11-03 14:53:58 +00:00
Zdenek Kabelac
dc964ab0d3 Thin uses _tdata instead of _tpool for data LV
Switch to different suffix and keep -tpool reserved for overlay device name.
2011-11-03 14:38:36 +00:00
Zdenek Kabelac
1f5c98270d Thin code cleanup
Use iterate_items for list processing.
2011-11-03 14:36:40 +00:00
Zdenek Kabelac
25de9addb6 Thin fix compile warns
Test for dm_snprintf < 0.
Add header for moved backup.
2011-10-30 22:52:08 +00:00
Zdenek Kabelac
7654abc26f Thin creation without activation
All thins are created with the next activation and VG is updated
without messages. Only some basic commands works.
(i.e. lvcreate -an  -V10 -T mvg/pool)
There can be some combination to confuse this system.

This functionality for snapshots is going to be interesting.
2011-10-30 22:07:38 +00:00