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Commit Graph

2454 Commits

Author SHA1 Message Date
Zdenek Kabelac
466098cd1c Reflect dm_config API update 2011-09-01 10:16:32 +00:00
Petr Rockai
97a4b5165e Replace const usage of dm_config_find_node with more appropriate value-lookup
functionality. A number of bugs (copied and pasted all over the code) should
disappear:

- most string lookup based on dm_config_find_node would segfault when
  encountering a non-zero integer (the intention there was to print an
  error message instead)
- check for required sections in metadata would have been satisfied by
  values as well (i.e. not sections)
- encountering a section in place of expected flag value would have
  segfaulted (due to assumed but unchecked cn->v != NULL)
2011-08-31 15:19:19 +00:00
Petr Rockai
e59e2f7c3c Move the core of the lib/config/config.c functionality into libdevmapper,
leaving behind the LVM-specific parts of the code (convenience wrappers that
handle `struct device` and `struct cmd_context`, basically). A number of
functions have been renamed (in addition to getting a dm_ prefix) -- namely,
all of the config interface now has a dm_config_ prefix.
2011-08-30 14:55:15 +00:00
Peter Rajnoha
d35188058b Directly allocate buffer memory in a pvck scan instead of using a mempool.
There's a very high memory usage when calling _pv_analyse_mda_raw (e.g. while
executing pvck) that can end up with "out of memory".

_pv_analyse_mda_raw scans for metadata in the MDA, iteratively increasing the
size to scan with SECTOR_SIZE until we find a probable config section or we're
at the edge of the metadata area. However, when using a memory pool, we're also
iteratively chasing for bigger and bigger mempool chunk which can't be found
and so we're always allocating a new one, consuming more and more memory...

This patch just changes the mempool to direct memory allocation in this
problematic part of the code.
2011-08-29 13:37:36 +00:00
Alasdair Kergon
11bfaa1df8 same for segtype_is_thin 2011-08-26 18:17:05 +00:00
Alasdair Kergon
6fbf1c6b56 seg_is_thin includes both thin_pool and thin_volume 2011-08-26 18:15:14 +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
Zdenek Kabelac
9d32170d5c Add registration of thin_pool segment
Register thin and thin_pool segment via multiple_segtypes.
2011-08-25 10:00:09 +00:00
Alasdair Kergon
f9b92564a7 Fix raid shared lib segtype registration (2.02.87). 2011-08-24 13:41:46 +00:00
Zdenek Kabelac
3ba4a19510 Initial code layout for thin provisioning target
Only registers init_thin_segtype

Option --with-thin=internal needed for compilation.
For now useful only for developememt!
2011-08-24 08:27:49 +00:00
Alasdair Kergon
c31d14d786 Remove incorrect error message added in 2.02.87. 2011-08-19 22:55:07 +00:00
Alasdair Kergon
1d64dcfbf7 clarify comment 2011-08-19 19:35:50 +00:00
Alasdair Kergon
ba7df3de88 avoid multi-line calc with incorrect intermediate var contents 2011-08-19 16:41:26 +00:00
Alasdair Kergon
3250b38583 _ for static fns 2011-08-19 15:59:15 +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
f439e65b64 Add support for m-way to n-way up-convert in RAID1 (no linear to n-way yet)
This patch adds the ability to upconvert a raid1 array - say from 2-way to
3-way.  It does not yet support upconverting linear to n-way.

The 'raid' device-mapper target allows for individual components (images) of
an array to be specified for rebuild.  This mechanism is used when adding
new images to the array so that the new images can be resync'ed while the
rest of the images in the array can remain 'in-sync'.  (There is no
mirror-on-mirror layering required.)
2011-08-18 19:41:21 +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
63d32fb6a6 When down-converting RAID1, don't activate sub-lvs between suspend/resume
of top-level LV.

We can't activate sub-lv's that are being removed from a RAID1 LV while it
is suspended.  However, this is what was being used to have them show-up
so we could remove them.  'sync_local_dev_names' is a sufficient and
proper replacement and can be done after the top-level LV is resumed.
2011-08-18 19:31:33 +00:00
Jonathan Earl Brassow
4903b85d23 Compiler warning fixes, better error messaging, and cosmetic changes.
1) add new function 'raid_remove_top_layer' which will be useful
to other conversion functions later (also cleans up code)
2) Add error messages if raid_[extract|add]_images fails
3) Add function prototypes to prevent compiler warnings when
compiling with '--with-raid=shared'
2011-08-13 04:28:34 +00:00
Jonathan Earl Brassow
a22515c87f Various code clean-ups (s/malloc/zalloc/, new msgs, etc)
Fix a couple more issues that kabi found.
- Add some error messages in failure cases
- s/malloc/zalloc/
- use vg->vgmem for lv names instead of vg->cmd->mem
2011-08-11 21:32:18 +00:00
Jonathan Earl Brassow
2100c90dd7 Add missing checks for function return codes.
Some functions were being called without having their return values checked.
2011-08-11 19:38:00 +00:00
Zdenek Kabelac
4afdf187a1 Trivial, add void to ignore dm_snprinf result 2011-08-11 19:21:42 +00:00
Alasdair Kergon
40dbaac892 pre-release fixes incl make distclean and configure --with-raid=none/shared 2011-08-11 19:18:17 +00:00
Jonathan Earl Brassow
b2fa9b43dc Add some log_error msg's and fix potential segfault
Thanks to kabi for spotting these - especially the possibility for
segfault if a loop runs all the way through without finding a match.
2011-08-11 19:17:10 +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
Zdenek Kabelac
cf98c05082 Add detect_internal_vg_cache_corruption to lvm.conf
Add config option to enable crc checking of VG structures.
Currently it's disabled by default.

For the internal test-suite this check it is enabled.

Note: In the case the internal error is detected, debug build with
compile option DEBUG_ENFORCE_POOL_LOCKING helps to catch the source
of the problem.
2011-08-11 17:46:13 +00:00
Zdenek Kabelac
031c986ea8 Lock memory for shared VG
Use debug pool locking functionality. So the command could check,
whether the memory in the pool has not been modified.

For lv_postoder() instead of unlocking and locking for every changed
struct status member do it once when entering and leaving function.
(mprotect would trap each such memory access).
Currently lv_postoder() does not modify other part of vg structure
then status flags of each LV with flags that are reverted back to
its original state after function exit.
2011-08-11 17:34:30 +00:00
Zdenek Kabelac
bb115a7a6c Cache and share generated VG structs
Extend vginfo cache with cached VG structure. So if the same metadata
are use, skip mda decoding in the case, the same data are in use.
This helps for operations like activation of all LVs in one VG,
where same data were decoded giving the same output result.

Patch adds 1-to-1 connection between volume_group and lvmcache_vginfo.
2011-08-11 17:24:23 +00:00
Peter Rajnoha
47d7f00e16 Fix possible format instance memory leaks and premature releases in _vg_read. 2011-08-11 16:31:40 +00:00
Peter Rajnoha
d183554c72 Suppress locking error messages in monitoring init scripts. 2011-08-11 15:27:46 +00:00
Jonathan Earl Brassow
34338a3406 Need 'ifdef' checks around RAID monitoring functions as well to catch the
case where the user does not want dmeventd support compiled in.
2011-08-11 14:00:58 +00:00
Milan Broz
26303811a4 Fix build of raid without dmeventd. 2011-08-11 13:30:36 +00:00
Jonathan Earl Brassow
3041b72f06 Add dmeventd monitoring for RAID devices. 2011-08-11 05:00:20 +00:00
Jonathan Earl Brassow
ff58e019d8 Add RAID metadata devices to considered devices in _add_lv_to_dtree.
_add_lv_to_dtree must also add RAID metadata devices.
2011-08-11 04:18:17 +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
530b00a652 Just add new lines between header comment 2011-08-10 20:26:41 +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
Zdenek Kabelac
789f9c55e5 Remove INCONSISTENT_VG flag
As this flag could not have been set by the current code - removing it.

Note: because of the wrong code logic this call:

lvmcache_update_vg(correct_vg, correct_vg->status & PRECOMMITTED &
			   (inconsistent ? INCONSISTENT_VG : 0));

had always passed '0' - now after flag removal it's passing
PRECOMMITTED flag in - this present functinal change in this patch.

To match the original functionality - 0 had to be always passed.
More testing is needed here.
2011-08-10 20:17:33 +00:00
Jonathan Earl Brassow
e01bcc6884 Fix compiler warning.
Compiler complaining that meta_lv could be used uninitialized.  (Not true
because it is protected by 'clear_metadata'.)  I switched to using 'lv->vg',
as it makes no difference to vg_[write|commit].
2011-08-10 16:44:17 +00:00
Milan Broz
05960a0c55 If anything bad happens and unlocking fails
(here clvmd crashed in the middle of operation),
lock is not removed from cache - here is one example:

locking/cluster_locking.c:497       Locking VG V_vg_test UN (VG) (0x6)
locking/cluster_locking.c:113   Error writing data to clvmd: Broken pipe
locking/locking.c:399         <backtrace>
locking/locking.c:461         <backtrace>
  Internal error: Volume Group vg_test was not unlocked

Code should always remove lock info from lvmcache and update counters
on unlock, even if unlock fails.
2011-08-10 16:07:53 +00:00
Alasdair Kergon
13db59839c autoreconf 2011-08-09 18:14:48 +00:00
Peter Rajnoha
cf9927697b Suppress low-level locking errors and warnings while using --sysinit.
Today, we use "suppress_messages" flag (set internally in init_locking fn based
on 'ignorelockingfailure() && getenv("LVM_SUPPRESS_LOCKING_FAILURE_MESSAGES")'.
This way, we can suppress high level messages like "File-based locking
initialisation failed" or "Internal cluster locking initialisation failed".

However, each locking has its own sequence of initialization steps and these
could log some errors as well. It's quite misleading for the user to see such
errors and warnings if the "--sysinit" is used (and so the ignorelockingfailure
&& LVM_SUPPRESS_LOCKING_FAILURE_MESSAGES environment variable). Errors and
warnings from these intermediary steps should be suppressed as well if requested.

This patch propagates the "suppress_messages" flag deeper into locking init
functions. I've also added these flags for other locking types for consistency,
though it's not actually used for no_locking and readonly_locking.
2011-08-09 11:44:57 +00:00
Peter Rajnoha
0127a9a525 Remove unused 'origin' variable in lv_remove_single function. 2011-08-05 09:21:13 +00:00
Zdenek Kabelac
425862fb95 Remove unused inconsistent_seqno
Last usage was removed in Petr's commit related to VG mda repair fix
where relaxed check starts to ignore inconsistencies coming from
PVs that are marked MISSING - thus removing unused variable.
2011-08-04 15:18:10 +00:00
Zdenek Kabelac
586f310618 Remove meaningless const type qualifiers on cast type
Static analyzis noticed we do not really need them - so removing.
2011-08-04 14:30:51 +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
Peter Rajnoha
c212019f3a Change DEFAULT_UDEV_SYNC to 1 so udev_sync is used even without any config.
This should be set by default! Normally we have "activation/udev_sync = 1"
in lvm.conf (example.conf.in). But if we use lvm2 without any config file
(or without a definition within '--config' option) the DEFAULT_UDEV_SYNC
is used instead. Together with verify_udev_operations=0 (when we rely on
udev fully), this can cause races as the node could be missing when needed.

(See also https://bugzilla.redhat.com/show_bug.cgi?id=723144)
2011-08-02 10:49:57 +00:00
Zdenek Kabelac
830df40482 Compare also file size to detect changed config file
Clvmd detects modifed config file before it takes lv_lock.
If the config file is changed rapidly - the change was ignored within
a seocnd ranged.  This patch adds also compare of file size.
So change like some flag for 0 to 1 would pass unnoticed - but
it's quick fix for failing test suite.

FIXME: Implement inotify solution.
2011-07-21 13:23:48 +00:00