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Commit Graph

236 Commits

Author SHA1 Message Date
Peter Rajnoha
95ced7a7be activate: add autoactivation hooks
Define an 'activation_handler' that gets called automatically on
PV appearance/disappearance while processing the lvmetad_pv_found
and lvmetad_pv_gone functions that are supposed to update the
lvmetad state based on PV availability state. For now, the actual
support is for PV appearance only, leaving room for PV disappearance
support as well (which is a more complex problem to solve as this
needs to count with possible device stack).

Add a new activation change mode - CHANGE_AAY exposed as
'--activate ay/-aay' argument ('activate automatically').

Factor out the vgchange activation functionality for use in other
tools (like pvscan...).
2012-06-28 09:42:47 -04:00
Peter Rajnoha
2729720fd3 args: add --activate synonym for --available arg
We're refererring to 'activation' all over the code and we're talking
about 'LVs being activated' all the time so let's use 'activation/activate'
everywhere for clarity and consistency (still providing the old
'available' keyword as a synonym for backward compatibility with
existing environments).
2012-06-28 09:42:44 -04:00
Peter Rajnoha
81c215de54 More comments on metadata area types. 2012-05-10 11:03:07 +00:00
Peter Rajnoha
8c3e4b43f1 Comment on auxiliary metadata areas. 2012-05-10 10:37:49 +00:00
Petr Rockai
dae0822698 The lvmetad client-side integration. Only active when use_lvmetad = 1 is set in
lvm.conf *and* lvmetad is running.
2012-02-23 13:11:07 +00:00
Zdenek Kabelac
d81498a824 Initialize dmeventd monitoring for every command
Read lvm.conf setting for monitoring for each command. So we should not
activate monitoring if the default compilation is set to monitor during
lvconvert commnads.

Patch also removes check for  clustered VG and allows to disable monitoring
for clustered VG with the assumption, the problem with monitoring and dmeventd
flag passing for INGNORE is already fixed.
2012-02-15 15:18:43 +00:00
Alasdair Kergon
b719e3d323 FMT_INSTANCE_VG is redundant now 2012-02-12 23:01:19 +00:00
Alasdair Kergon
ba14fff2af FMT_INSTANCE_PV is no longer used 2012-02-12 22:37:24 +00:00
Petr Rockai
6e41729eb8 Keep a global (per-format) orphan_vg and keep any and all orphan PVs linked to
it. Avoids the need for FMT_INSTANCE_PV and enables further simplifications. No
functional change, internal refactor only.
2012-02-10 02:53:03 +00:00
Alasdair Kergon
46c67b5279 Use chunk_size consistently for thin_pool within LVM. 2012-01-24 00:55:03 +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
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
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
Zdenek Kabelac
466a8ebf9d Thin removing unused detach_pool_messages 2011-11-03 14:57:04 +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
96279ac1c0 Make detach_pool_message visible for tools
Move there also vg_write and vg_commit.
2011-10-30 22:01:39 +00:00
Zdenek Kabelac
a1d5aaf725 Thin pool activation change
To ensure we properly handle LV cluster locking - explicitely do
not allow to change the availability of the thin pool that is in use
for some thin LV.

As soon as the thin volume is created the only way to activate pool
is via implicit dependency.

Ignore thinpool open count for lv/vgchange operations.
2011-10-28 20:28:00 +00:00
Zdenek Kabelac
bd4b840879 Add last_seg
Implement a function to return the last segment in a LV.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
2011-10-28 20:12:54 +00:00
Zdenek Kabelac
f0c9160df4 Store transaction_id with created thin lv
So we know the creation history and this should be useful with vgcfgrestore.
2011-10-21 11:38:35 +00:00
Zdenek Kabelac
a25434a3a3 Message support for thin provisiong
lvm part of messaging.

Each message is now stored it's own thin pool section:

message1 {
	create = lv
}

Messages are queued to thin pool dm target when this target
is going to be resumed or used through some dependency.

Currently  'delete' message are purely queued and processed
with next thin pool resume operation (i.e. create_thin).

WARNING - thin provisioning support is developmental code.
2011-10-17 14:17:09 +00:00
Jonathan Earl Brassow
f60175c308 Add the ability to convert LVs of "mirror" segtype to "raid1" segtype.
Example:
~> lvconvert --type raid1 vg/mirror_lv

Steps to convert "mirror" to "raid1"
1) Allocate a RAID metadata LV for each mirror image from the same PVs
   on which they are located.
2) Clear the metadata LVs.  This involves writing LVM metadata, so we don't
   change any aspects of the mirror LV before this so that the user can easily
   remove LVs from the failed convert attempt while retaining the original
   mirror.
3) Remove the mirror log, if it exists.
4) Add metadata LVs to mirror LV
5) Rename mirror sub-lvs (s/mimage/rimage/)
6) Change flags and segtype from mirror to raid1
2011-10-07 14:56:01 +00:00
Zdenek Kabelac
aebf2d5cdc Add experimental code for activation of thinp targets
No dm messages yes - just a base functionality in the steps of other targets.
For now usable only for debugging and tracing.
2011-09-29 08:56:38 +00:00
Alasdair Kergon
1c26860d82 Abort if _finish_pvmove suspend_lvs fails instead of cleaning up incompletely.
Change suspend_lvs to call vg_revert internally.
Change vg_revert to void and remove superfluous calls after failed vg_commit.
2011-09-27 17:09:42 +00:00
Zdenek Kabelac
886d005616 LVM_WRITE and LVM_READ are 64bit constants
Revert John patch, which fixed only 1 place where ~LVM_WRITE was in use and
convert ommited LVM_READ/WRITE flags to 64bit constants as well.
(Since both 'status' flags for LV and VG are 64bit.)
2011-09-14 09:57:35 +00:00
Alasdair Kergon
52e3f9dd5e Add 7th lv_attr char to show the related kernel target.
Add thin volume types to lv_attr.
2011-09-08 20:55:39 +00:00
Alasdair Kergon
ef78ebf35a lvcreate/remove thin_pool and thin volumes (--driverloaded n only) 2011-09-08 16:41:18 +00:00
Zdenek Kabelac
f32b76a193 Minor change for pv_create api
Switch int to unsigned type.
2011-09-07 08:34:21 +00:00
Alasdair Kergon
bb6f9b10db pool attach fns & more field renaming 2011-09-06 22:43:56 +00:00
Alasdair Kergon
b88362ff95 add thin_manip.c like the other manip files
move basic lv_is_* to macros
data_lv -> pool_lv - we decided to call it 'pool' everywhere now
2011-09-06 19:25:42 +00:00
Alasdair Kergon
2ef5b7cca6 Start using 64-bit status flags - most of the code already handles them.
tdata -> tpool
remove commented out definitions from metadata.h
formatting clean-ups
2011-09-06 18:49:31 +00:00
Alasdair Kergon
9ac61d2ba2 lvcreate parsing for thin provisioning.
The rest is incomplete so this isn't usable yet.
2011-09-06 00:26:42 +00:00
Alasdair Kergon
42914557d5 thin - hide unimplemented dso fn; remove duplicate origin_lv field; add
some lvcreate struct parms
2011-08-26 17:40:53 +00:00
Zdenek Kabelac
e82bd6249b Initial code for read/write of thin metadata lv segments 2011-08-26 13:37:47 +00:00
Jonathan Earl Brassow
a2facf4ad4 Add ability to merge back a RAID1 image that has been split w/ --trackchanges
Argument layout is very similar to the merge command for snapshots.
2011-08-18 19:43:08 +00:00
Jonathan Earl Brassow
6d04311efa Add the ability to split an image from the mirror and track changes.
~> lvconvert --splitmirrors 1 --trackchanges vg/lv
The '--trackchanges' option allows a user the ability to use an image of
a RAID1 array for the purposes of temporary read-only access.  The image
can be merged back into the array at a later time and only the blocks that
have changed in the array since the split will be resync'ed.  This
operation can be thought of as a partial split.  The image is never completely
extracted from the array, in that the array reserves the position the device
occupied and tracks the differences between the array and the split image via
a bitmap.  The image itself is rendered read-only and the name (<LV>_rimage_*)
cannot be changed.  The user can complete the split (permanently splitting the
image from the array) by re-issuing the 'lvconvert' command without the
'--trackchanges' argument and specifying the '--name' argument.
	~> lvconvert --splitmirrors 1 --name my_split vg/lv
Merging the tracked image back into the array is done with the '--merge'
option (included in a follow-on patch).
	~> lvconvert --merge vg/lv_rimage_<n>

The internal mechanics of this are relatively simple.  The 'raid' device-
mapper target allows for the specification of an empty slot in an array
via '- -'.  This is what will be used if a partial activation of an array
is ever required.  (It would also be possible to use 'error' targets in
place of the '- -'.)  If a RAID image is found to be both read-only and
visible, then it is considered separate from the array and '- -' is used
to hold it's position in the array.  So, all that needs to be done to
temporarily split an image from the array /and/ cause the kernel target's
bitmap to track (aka "mark") changes made is to make the specified image
visible and read-only.  To merge the device back into the array, the image
needs to be returned to the read/write state of the top-level LV and made
invisible.
2011-08-18 19:38:26 +00:00
Jonathan Earl Brassow
a324baf6a1 Add --splitmirrors support for RAID1 (1 image only)
Users already have the ability to split an image from an LV of "mirror"
segtype.  This patch extends that ability to LVs of "raid1" segtype.

This patch only allows a single image to be split off, however.  (The
"mirror" segtype allows an arbitrary number of images to be split off.
e.g.  4-way => 3-way/linear, 2-way/2-way, linear,3-way)
2011-08-18 19:34:18 +00:00
Jonathan Earl Brassow
4aebd52c4c Add ability to down-convert RAID1 arrays.
Also, add some simple RAID tests to testsuite.
2011-08-11 18:24:40 +00:00
Jonathan Earl Brassow
66d9675559 Fix renaming of RAID logical volumes.
The function 'for_each_sub_lv', which rename uses, was not handling the
RAID metadata areas.  Thus, the metadata LVs were not being renamed.
2011-08-11 03:29:51 +00:00
Zdenek Kabelac
077a6755ff Replace free_vg with release_vg
Move the free_vg() to  vg.c  and replace free_vg  with release_vg
and make the _free_vg internal.

Patch is needed for sharing VG in vginfo cache so the release_vg function name
is a better fit here.
2011-08-10 20:25:29 +00:00
Jonathan Earl Brassow
cac52ca4ce Add basic RAID segment type(s) support.
Implementation described in doc/lvm2-raid.txt.

Basic support includes:
- ability to create RAID 1/4/5/6 arrays
- ability to delete RAID arrays
- ability to display RAID arrays
Notable missing features (not included in this patch):
- ability to clean-up/repair failures
- ability to convert RAID segment types
- ability to monitor RAID segment types
2011-08-02 22:07:20 +00:00
Zdenek Kabelac
93a98c2672 Remove unused internal flag ACTIVATE_EXCL from the code 2011-06-17 14:30:58 +00:00
Alasdair Kergon
df390f1799 Major pvmove fix to issue ioctls in the correct order when multiple LVs
are affected by the move.  (Currently it's possible for I/O to become
trapped between suspended devices amongst other problems.

The current fix was selected so as to minimise the testing surface.  I
hope eventually to replace it with a cleaner one that extends the
deptree code.

Some lvconvert scenarios still suffer from related problems.
2011-06-11 00:03:06 +00:00
Alasdair Kergon
453cdee51c Permit --available with lvcreate so non-snapshot LVs need not be activated. 2011-06-01 19:21:03 +00:00
Petr Rockai
833a287337 Make vg_mark_partial_lvs also clear existing PARTIAL_LV flags, so it can be
issued repeatedly on the same VG, keeping the PARTIAL_LV flags up to date.
2011-05-07 13:32:05 +00:00
Alasdair Kergon
9cda028a96 clean up critical section patch 2011-04-28 20:29:59 +00:00
Jonathan Earl Brassow
fe93c99ad9 This patch adds the ability to extend 0 length layered LVs. This
allows us to allocate all images of a mirror (or RAID array) at one
time during create.

The current mirror implementation still requires a separate allocation
for the log, however.
2011-04-06 21:32:20 +00:00
Jonathan Earl Brassow
60c10a45ce s/MIRROR_NOTSYNCED/LV_NOTSYNCED/ - Flag will may refer to more than just mirrors 2011-03-29 12:51:57 +00:00
Peter Rajnoha
84f48499a3 Add new free_pv_fid fn and use it throughout to free all attached fids.
Since format instances will use own memory pool, it's necessary to properly
deallocate it. For now, only fid is deallocated. The PV structure itself
still uses cmd mempool mostly, but anytime we'd like to add a mempool
in the struct physical_volume, we can just rename this fn to free_pv and
add the code (like we have free_vg fn for VGs).
2011-03-11 14:56:56 +00:00