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Commit Graph

736 Commits

Author SHA1 Message Date
Petr Rockai
dba6dec661 metadata: Make it possible to write partial VGs obtained from lvmetad. 2014-06-08 17:41:11 +02:00
Zdenek Kabelac
aafd7c878c cleanup: indent 2014-05-21 23:14:41 +02:00
Alasdair G Kergon
2eed136f0f signals: Move sigint handling out to lvm-signal. 2014-05-01 20:07:17 +01:00
Peter Rajnoha
5b28cbd7c2 cleanup: _move_pv is static
metadata/metadata.c:363:5: warning: no previous prototype for '_move_pv' [-Wmissing-prototypes]
2014-04-28 12:11:44 +02:00
Jonathan Brassow
9ac858fe6b vgsplit: Make vgsplit work on mirrors with leg and log on same PV
Given a named mirror LV, vgsplit will look for the PVs that compose it
and move them to a new VG.  It does this by first looking at the log
and then the legs.  If the log is on the same device as one of the mirror
images, a problem occurs.  This is because the PV is moved to the new VG
as the log is processed and thus cannot be found in the current VG when
the image is processed.  The solution is to check and see if the PV we are
looking for has already been moved to the new VG.  If so, it is not an
error.
2014-04-25 14:53:34 -05:00
Alasdair G Kergon
17e304e0ac metadata: Fix unlock on VG recovery error path.
If lock conversion failed it tried to unlock VG that was no longer locked.
2014-04-18 02:27:16 +01:00
Zdenek Kabelac
5553a099d1 cleanup: use DM_ARRAY_SIZE
More use of libdevmapper macro
2014-04-08 11:00:15 +02:00
Alasdair G Kergon
12ddaa5f10 lib: Share lvm_even_rand for random numbers. 2014-04-04 01:26:19 +01:00
Zdenek Kabelac
84beba5d7f vg_validate: check size of lv_name + vg_name
Since the whole dm device name may not exceed 127 characters,
validate no LV names is bigger then this limit.
2014-03-31 12:05:32 +02:00
Zdenek Kabelac
b6eb2ac10a cleanup: indent 2014-03-19 00:58:02 +01:00
Zdenek Kabelac
caf93eb1cb cleanup: simplify pv name print
pv_vg_name() now already hides orphans.
2014-03-19 00:58:01 +01:00
Zdenek Kabelac
506091be70 pv_vg_name: do not expose internal orphans to lvm2 users
Check for orphan VG name and return just empty string,
Use internally pv->vg_name if the real orphan name is needed.
2014-03-19 00:57:59 +01:00
Zdenek Kabelac
013f5f4550 metadata: print VG with invalid chars in quotes
We we report invalid chars, put quotes around vg name.
2014-03-19 00:48:39 +01:00
Zdenek Kabelac
090e81281f lvmetad: more reuse precommit buffer
This patch moves more allocation to vg_write
(as started in 8c878438f5)
TODO: relocate also communication.
(in-release update)
2014-03-01 14:08:58 +01:00
Zdenek Kabelac
8c878438f5 metadata: move vg parsing to vg_write
Parsing vg structure during  supend/commit/resume may require a lot of
memory - so move this into vg_write.

FIXME: there are now multiple cache layers which our doing some thing
multiple times at different levels. Moreover there is now different
caching path with and without lvmetad - this should be unified
and both path should use same mechanism.
2014-02-24 21:08:53 +01:00
Peter Rajnoha
b1e8284f33 pvcreate: do not print stack when pv not found while doing pvcreate_check
Not finding an existing PV on a disk where we're just
creating the PV is not an error or any bad condition.
Remove misleading "stack" call.
2014-02-18 10:01:11 +01:00
Peter Rajnoha
ed166a3b1d wiping: wipe DM_snapshot_cow signature without prompt in newly created LVs
The libblkid can detect DM_snapshot_cow signature and when creating
new LVs with blkid wiping used (allocation/use_blkid_wiping=1 lvm.conf
setting and --wipe y used at the same time - which it is by default).

Do not issue any prompts about this signature when new LV is created
and just wipe it right away without asking questions. Still keep the
log in verbose mode though.
2014-02-10 13:28:13 +01:00
Alasdair G Kergon
4aa8a14fc2 compilation: Rename tags variables to tagsl. 2014-01-30 21:09:28 +00:00
Zdenek Kabelac
94137b72ed lv_dependency: scan also snapshots and extorigins
When LV is scanned for its dependencies - scan also origin's snapshots,
and thin external origins.

So if any PV from snapshot or external origin device is missing - lvm2 will
avoid trying to activate such device.
2013-12-17 14:08:54 +01:00
Peter Rajnoha
32080c4ff7 device: add physical block size info and make sure VG extent size >= PV's phys. block size 2013-12-12 15:02:36 +01:00
Zdenek Kabelac
993831bdb1 cleanup: size is already 64bit value
Cast is not needed.
2013-12-04 14:30:25 +01:00
Alasdair G Kergon
2e82a070f3 pvcreate: Avoid spurious 'not found' messages.
Replacement of pv_read by find_pv_by_name in commit
651d5093ed caused spurious
error messages when running pvcreate or vgextend against an
unformatted device.

Physical volume /dev/loop4 not found
Physical volume "/dev/loop4" successfully created

Physical volume /dev/loop4 not found
Physical volume /dev/loop4 not found
Physical volume "/dev/loop4" successfully created
Volume group "vg1" successfully extended
2013-11-29 21:45:37 +00:00
Peter Rajnoha
6a1957badc pvcreate: do not issue warning about any existing PV
If we're calling pvcreate on a device that already has a PV label,
the blkid detects the existing PV and then we consider it for wiping
before we continue creating the new PV label and we issue a warning
with a prompt whether such old PV label should be removed. We don't
do this with native signature detection code. Let's make it consistent
with old behaviour.

But still keep this "PV" (identified as "LVM1_member" or "LVM2_member"
by blkid) detection when creating new LVs to avoid unexpected PV label
appeareance inside LV.
2013-11-28 13:14:46 +01:00
Zdenek Kabelac
c6cfd7b2b9 cleanup: drop extra dm_list_empty
Since dm_list_first has this check already include,
skip extra call in while().
Moreover analyzers are then sure pvl is not NULL.
2013-11-28 12:45:52 +01:00
Zdenek Kabelac
bfcf3edcc6 cleanup: fold test into printf arg
When arg is folded, compiler is able to check all args.
(better for security)
2013-11-28 12:45:52 +01:00
Peter Rajnoha
eaa23d3273 wiping: add support for blkid wiping
This is actually the wipefs functionailty as a matter of fact
(wipefs uses the same libblkid calls).

libblkid is more rich when it comes to detecting various
signatures, including filesystems and users can better
decide what to erase and what should be kept.

The code is shared for both pvcreate (where wiping is necessary
to complete the pvcreate operation) and lvcreate where it's up
to the user to decide.

The verbose output contains a bit more information about the
signature like LABEL and UUID.

For example:
  raw/~ # lvcreate -L16m vg
  WARNING: linux_raid_member signature detected on /dev/vg/lvol0 at offset 4096. Wipe it? [y/n]

or more verbose one:
  raw/~ # lvcreate -L16m vg -v
  ...
     Found existing signature on /dev/vg/lvol0 at offset 4096: LABEL="raw.virt:0" UUID="da6af139-8403-5d06-b8c4-13f6f24b73b1" TYPE="linux_raid_member" USAGE="raid"
WARNING: linux_raid_member signature detected on /dev/vg/lvol0 at offset 4096. Wipe it? [y/n]

The verbose output is the same output as found in blkid.
2013-11-27 15:49:15 +01:00
Peter Rajnoha
03c941a4ca device: cleanup signature wiping functions
The wipe_known_signatures fn now wraps the _wipe_signature fn that is called
for each known signature (currently md, swap and luks). This patch makes the
code more readable, not repeating the same sequence when used anywhere in the
code. We're going to reuse this code later...
2013-11-27 12:56:58 +01:00
Zdenek Kabelac
bea118a87c cleanup: use safe iterator
Simplify code and use dm_list_iterate_items_safe() and avoid
scanning the list mutliple times.
Use dm_list_move().
2013-11-22 21:00:55 +01:00
Tony Asleson
0dd247502a lvm2app: Add VG/LV name validation
C library portion for
https://bugzilla.redhat.com/show_bug.cgi?id=883689

Signed-off-by: Tony Asleson <tasleson@redhat.com>
2013-11-19 14:40:39 -06:00
Tony Asleson
04304ba735 lvm2app: Add ability to create PV with args
Add a PV create which takes a paramters object that
has get/set method to configure PV creation.

Current get/set operations include:
- size
- pvmetadatacopies
- pvmetadatasize
- data_alignment
- data_alignment_offset
- zero

Reference: https://bugzilla.redhat.com/show_bug.cgi?id=880395

Signed-off-by: Tony Asleson <tasleson@redhat.com>
2013-11-19 14:40:34 -06:00
Tony Asleson
5074dcc896 metadata.c: Call refactored vgreduce_single
Replace the code with the refactored vgreduce_single instead
of calling its own implementation.

Corrects bug: https://bugzilla.redhat.com/show_bug.cgi?id=989174

Signed-off-by: Tony Asleson <tasleson@redhat.com>
2013-11-19 14:40:30 -06:00
Petr Rockai
3a6f91d713 metadata: Make the fid mda routines a little more resilient. 2013-11-18 18:00:49 +01:00
Petr Rockai
bead8ef5f0 metadata: Nuke the exported "pv_read" function. 2013-11-17 21:41:27 +01:00
Petr Rockai
ba6d6f0028 metadata: Fix handling of orphan PV linking & re-linking. 2013-11-17 21:41:27 +01:00
Petr Rockai
651d5093ed metadata: Avoid pv_read in find_pv_by_name. 2013-11-17 21:41:27 +01:00
Petr Rockai
e1a63905d1 metadata: Do not try to check vg_name of a NULL PV. 2013-11-17 21:41:26 +01:00
Petr Rockai
0decd7553a metadata: Fix metadata repair paths when lvmetad is used. 2013-10-09 14:44:01 +02:00
Alasdair G Kergon
baf95bbff7 cmdline: Add --ignoreskippedcluster.
Accept --ignoreskippedcluster with pvs, vgs, lvs, pvdisplay, vgdisplay,
lvdisplay, vgchange and lvchange to avoid the 'Skipping clustered
VG' errors when requesting information about a clustered VG
without using clustered locking and still exit with success.

The messages can still be seen with -v.
2013-10-01 21:20:10 +01:00
Zdenek Kabelac
30432bd604 cleanup: skip call of detect...
SInce we know the pool was locked and we want to reloc pool again,
just use '1' directly.
2013-09-23 11:35:15 +02:00
Petr Rockai
6d2604f026 metadata: Fix tracking of read_status flags in _vg_make_handle. 2013-07-22 12:04:47 +02:00
Petr Rockai
3ed7f78ff4 metadata: Do not ignore errors in _vg_update_vg_ondisk. 2013-07-22 12:00:48 +02:00
Petr Rockai
f897fcbd95 metadata: Do not try to maintain an ondisk copy of orphan VGs. 2013-07-22 11:51:35 +02:00
Zdenek Kabelac
460d0254eb thin: add pool metadata spare lv support
Add support for pool's metadata spare volume.
2013-07-18 18:22:43 +02:00
Zdenek Kabelac
20187fc190 cleanup: use dm_list_empty
Check for empty list directly.
2013-07-18 18:22:42 +02:00
Alasdair G Kergon
aaa9a68b2f metadata: cleanup comments and formatting 2013-07-09 12:34:48 +01:00
Alasdair G Kergon
8adddbf101 pvcreate: remove metadata.h header
Files in tools/ should only use metadata-exported.h not metadata.h.
Rename pvcreate_locked to pvcreate_single.
2013-07-09 02:37:56 +01:00
Zdenek Kabelac
a64239f225 cleanup: use plain unsigned types 2013-07-05 17:20:57 +02:00
Zdenek Kabelac
7319bc0420 cleanup: move declaration to front 2013-07-05 17:20:57 +02:00
Tony Asleson
50db109e20 liblvm: Moved additional pv resize code
The pv resize code required that a lvm_vg_write be done
to commit the change.  When the method to add the ability
to list all PVs, including ones that are not assocated with
a VG we had no way for the user to make the change persistent.
Thus additional resize code was move and now liblvm calls into
a resize function that does indeed write the changes out, thus
not requiring the user to explicitly write out he changes.

Signed-off-by: Tony Asleson <tasleson@redhat.com>
2013-07-02 14:24:34 -05:00
Tony Asleson
8ddb1b4abf _get_pvs: Remove unused variable
Signed-off-by: Tony Asleson <tasleson@redhat.com>
2013-07-02 14:24:34 -05:00
Tony Asleson
ef3ab801e8 lvm2app: Add function to retrieve list of PVs V3
As locks are held, you need to call the included function
to release the memory and locks when done transversing the
list of physical volumes.

V2: Rebase fix
V3: Prevent VGs from getting cached and then write protected.

Signed-off-by: Tony Asleson <tasleson@redhat.com>
2013-07-02 14:24:33 -05:00
Peter Rajnoha
d6a91da4be config: add profile arg to find_config_tree_bool 2013-07-02 15:19:09 +02:00
Peter Rajnoha
50bf2c0db1 config: add profile arg to find_config_tree_int 2013-07-02 15:19:09 +02:00
Zdenek Kabelac
2f334b16d2 cleanup: use struct assign
Simplier code with struct assign.
Drop unneeded zeroing of zallocated memory.
2013-06-17 09:37:06 +02:00
Peter Rajnoha
c6f48b7c1a refactor: make device type recognition code common for general use
Changes:

- move device type registration out of "type filter" (filter.c)
to a separate and new dev-type.[ch] for common use throughout the code

- the structure for keeping the major numbers detected for available
device types and available partitioning available is stored in
"dev_types" structure now

- move common partitioning detection code to dev-type.[ch] as well
together with other device-related functions bound to dev_types
(see dev-type.h for the interface)

The dev-type interface contains all common functions used to detect
subsystems/device types, signature/superblock recognition code,
type-specific device properties and other common device properties
(bound to dev_types), including partitioning support.

- add dev_types instance to cmd context as cmd->dev_types for common use

- use cmd->dev_types throughout as a central point for providing
information about device types
2013-06-12 12:08:56 +02:00
Peter Rajnoha
657abb08e0 cleanup: use libdm's dm_sysfs_dir() for sysfs directory throughout
And remove superfluous cmd->sysfs_dir and
set_sysfs_dir_path/sysfs_dir_path fn from lvm-globals.[ch].
2013-06-12 11:44:58 +02:00
Petr Rockai
2cce2f67ab metadata: Fix a pool CRC failure due to "late" ondisk copy creation. 2013-06-10 17:26:38 +02:00
Petr Rockai
f65dd341a5 locking: Make it possible to pass down an LV to activation code.
Previously, we have relied on UUIDs alone, and on lvmcache to make getting a
"new copy" of VG metadata fast. If the code which triggers the activation has
the correct VG metadata at hand (the version which is currently on disk), it can
now hand it to the activation code directly.
2013-06-10 17:26:38 +02:00
Petr Rockai
5d5f2306bd Add and track an "ondisk" pointer to struct volume_group.
This allows us to get the current on-disk version of the metadata whenever we
have the current in-flight version, without a recourse to scanning or lvmcache.
2013-06-10 17:26:29 +02:00
Zdenek Kabelac
2f1a571c97 fid: fix reset of PV fid
Avoid hitting memory corruption (double free) in code path,
where PV FID has been already destroyed and the released pointer
was left in PV structure and could have been tried to be released
from there 2nd. time with final context destruction.
2013-05-30 16:52:39 +02:00
Peter Rajnoha
732859d21f refactor: rename embedding area -> bootloader area 2013-05-28 12:37:22 +02:00
Zdenek Kabelac
3ba3bc0d66 cleanup: drop backtrace
After log_error/log_warn there is no point to show <backtrace>
in debug log trace from the next code line.
2013-05-27 10:28:32 +02:00
Mike Snitzer
8ad7865b42 Fix alignment of PV data area if detected alignment less than 1 MB
This fixes a long standing regression since LVM2 2.02.74 (commit 4efb1d9c,
"Update heuristic used for default and detected data alignment.")

The default PE alignment could be used (via MAX()) even if it was
determined that the device's MD stripe width, or minimal_io_size or
optimal_io_size were not factors of the default PE alignment (either 64K
or the newer default of 1MB, etc).  This bug would manifest if the
default PE alignment was larger than the overriding hint that the
device provided (e.g. default of 1MB vs optimal_io_size of 768K).

Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2013-05-13 15:56:47 -04:00
Petr Rockai
382fc878d7 lvmetad: Check for reappeared PVs. 2013-04-03 12:48:28 +02:00
Peter Rajnoha
5c93f3997b metadata: use PV's internal UNLABELLED_PV flag more consistently
Set when new PV created, cleared on PV write.
2013-03-25 16:21:59 +01:00
Peter Rajnoha
ea36d0501e cleanup: remove unused 'pv_by_path' fn
The pv_by_path might be also dangerous to use as it does not
count with any other metadata areas but the ones found on the PV
itself. If metadata was not found on the PV referenced by the path,
it returned no PV though it might have been referenced by metadata
elsewhere (on other PVs...).
2013-03-19 14:57:36 +01:00
Peter Rajnoha
7e5e2dd4ee vgextend: do not allow PV with 0 MDAs to be added while already in a VG
If extending a VG and including a PV with 0 MDAs that was already
a part of a VG, the vgextend allowed that PV to be added and we
ended up *with one PV in two VGs*!

The vgextend code used the 'pv_by_path' fn that returned a PV for
a given path. However, when the PV did not have any metadata areas,
the fn just returned a PV without any reference to existing VG.
Consequently, any checks for the existing VG failed.

[0] raw/~ # pvcreate --metadatacopies 0 /dev/sda
  Physical volume "/dev/sda" successfully created

[0] raw/~ # pvcreate --metadatacopies 1 /dev/sdb
  Physical volume "/dev/sdb" successfully created

[0] raw/~ # vgcreate vg1 /dev/sda /dev/sdb
  Volume group "vg1" successfully created

[0] raw/~ # pvcreate --metadatacopies 1 /dev/sdc
  Physical volume "/dev/sdc" successfully created

[0] raw/~ # vgcreate vg2 /dev/sdc
  Volume group "vg2" successfully created

Before this patch (incorrect):
[0] raw/~ # vgextend vg2 /dev/sda
  Volume group "vg2" successfully extended

With this patch (correct):
[0] raw/~ # vgextend vg2 /dev/sda
  Physical volume '/dev/sda' is already in volume group 'vg1'
  Unable to add physical volume '/dev/sda' to volume group 'vg2'.
2013-03-19 14:57:36 +01:00
Peter Rajnoha
59878d0129 metadata: add 'allow_orphan' arg to find_pv_by_name fn
Before, the find_pv_by_name call always failed if the PV found was orphan.
However, we might use this function even for a PV that is not part of any VG.
This patch adds 'allow_orphan' arg to find_pv_by_name fn that allows that.
2013-03-19 14:57:31 +01:00
Peter Rajnoha
5b6bab2e30 cleanup: remove superfluous wrappers
_find_pv_by_name -> find_pv_by_name
_find_pv_in_vg -> find_pv_in_vg
_find_pv_in_vg_by_uuid -> find_pv_in_vg_by_uuid

The only callers of the underscored variants were their wrappers
without the underscore. No other part of the code referenced the
underscored variants.
2013-03-19 13:58:02 +01:00
Peter Rajnoha
386886f71c config: refer to config nodes using assigned IDs
For example, the old call and reference:

  find_config_tree_str(cmd, "devices/dir", DEFAULT_DEV_DIR)

...now becomes:

  find_config_tree_str(cmd, devices_dir_CFG)

So we're referring to the named configuration ID instead
of passing the configuration path and the default value
is taken from central config definition in config_settings.h
automatically.
2013-03-06 10:14:33 +01:00
Peter Rajnoha
b778653f03 pv_header_extension: add support for writing PV header extension (flags & Embedding Area)
The PV header extension information (PV header extension version, flags
and list of Embedding Area locations) is stored just beyond the PV header base.

When calculating the Embedding Area start value (ea_start), the same logic is
used as when calculating the pe_start value for Data Area - the value must
follow exactly the same alignment restrictions for its start value
(the alignment detected automatically or provided via command line using
the --dataalignment and --dataalignmentoffset arguments).

The Embedding Area is placed at the very start of the PV, starting at
ea_start. The Data Area starting at pe_start is placed next. The pe_start is
still properly aligned. Due to the pe_start alignment, it's possible that the
resulting Embedding Area size (ea_size) ends up bigger in size than requested
(but never less than requested).
2013-02-26 11:28:00 +01:00
Peter Rajnoha
6d8de3638c cleanup: use struct pvcreate_restorable_params throughout 2013-02-26 11:25:11 +01:00
Peter Rajnoha
6692b17777 cleanup: add struct pvcreate_restorable_params and move relevant items from pvcreate_params
Extract restorable PV creation parameters from struct pvcreate_params into
a separate struct pvcreate_restorable_params for clarity and also for better
maintainability when adding any new items later.
2013-02-26 11:24:38 +01:00
Peter Rajnoha
303e86adc8 pvcreate: fix alignment to incorporate alignment offset if PV has 0 MDAs
If zero metadata copies are used, there's no further recalculation of
PV alignment that happens when adding metadata areas to the PV and
which actually calculates the alignment correctly as a matter of fact.
So fix this for "PV without MDA" case as well.

Before this patch:
[1] raw/~ # pvcreate --dataalignment 8m --dataalignmentoffset 4m
--metadatacopies 1 /dev/sda
  Physical volume "/dev/sda" successfully created
[1] raw/~ # pvs -o pv_name,pe_start
  PV         1st PE
  /dev/sda    12.00m
[1] raw/~ # pvcreate --dataalignment 8m --dataalignmentoffset 4m
--metadatacopies 0 /dev/sda
  Physical volume "/dev/sda" successfully created
[1] raw/~ # pvs -o pv_name,pe_start
  PV         1st PE
  /dev/sda     8.00m

After this patch:
[1] raw/~ # pvcreate --dataalignment 8m --dataalignmentoffset 4m
--metadatacopies 1 /dev/sda
  Physical volume "/dev/sda" successfully created
[1] raw/~ # pvs -o pv_name,pe_start
  PV         1st PE
  /dev/sda    12.00m
[1] raw/~ # pvcreate --dataalignment 8m --dataalignmentoffset 4m
--metadatacopies 0 /dev/sda
  Physical volume "/dev/sda" successfully created
[1] raw/~ # pvs -o pv_name,pe_start
  PV         1st PE
  /dev/sda    12.00m

Also, remove a superfluous condition "pv->pe_start < pv->pe_align" in:
  if (pe_start == PV_PE_START_CALC && pv->pe_start < pv->pe_align)
    pv->pe_start = pv->pe_align ...
This part of the condition is not reachable as with the PV_PE_START_CALC,
we always have pv->pe_start set to 0 from the PV struct initialisation
(...the pv->pe_start value is just being calculated).
2013-02-21 14:51:19 +01:00
Alasdair G Kergon
06abb2dd4c logging: classify log_debug messages
Place most log_debug() messages into a class.
2013-01-07 22:30:29 +00:00
Alasdair G Kergon
b617109fff lvmetad: fix format1 updates
fmt1 doesn't have a separate commit function: updates take effect
immediately vg_write is called, so we must update lvmetad at this
point if we're going to go on and ask lvmetad for the VG metadata
again before calling the commit function (though that's probably an
unsupported and pointless thing to do anyway as the client must
already have that data and it cannot have changed because it's locked
and with devs suspended we shouldn't be communicating with lvmetad;
so when that's fixed properly, this fix here can be reverted).

This problem showed up as an internal error when lvremoving an LVM1
snapshot.

> Internal error: LV snap1 (00000000000000000000000000000001) missing from preload metadata

https://bugzilla.redhat.com/891855
2013-01-05 03:17:35 +00:00
Zdenek Kabelac
401c9aba4a pv_read: add missing check for valid info
If the lvmcache_info_from_pvid() fails to find valid
info, invoke the lookup by dev, and only in this case
call lvmcache_info_from_pvid() again.

Also check for the result of info and return
error directly, so the NULL is not passed
to lvmcache_get_label().
2012-12-15 17:23:27 +01:00
Zdenek Kabelac
e431b19bac cleanup: move log_error upward in code stack
Report log_error earlier.
2012-10-17 15:41:44 +02:00
Zdenek Kabelac
b89963a7c3 cleanup: swap return values
Use lvm standard return code for success/fail  1/0.
2012-10-17 15:37:26 +02:00
Zdenek Kabelac
6595cae6e9 cleanup: resolve dereferencing type-punned pointer
fix gcc warning:
dereferencing type-punned pointer will break strict-aliasing rules
Replace call by value and pass just const pointer to pvid.
2012-10-14 23:14:00 +02:00
Zdenek Kabelac
9ee071705b cleanup: fix compiler warnings
remove unused vars
move var declarations into the front of functions.
fix some sign warnings
2012-10-12 10:25:07 +02:00
Alasdair G Kergon
438e0050df config: add silent mode
Accept -q as the short form of --quiet.
Suppress non-essential standard output if -q is given twice.
Treat log/silent in lvm.conf as equivalent to -qq.
Review all log_print messages and change some to
log_print_unless_silent.

When silent, the following commands still produce output:
dumpconfig, lvdisplay, lvmdiskscan, lvs, pvck, pvdisplay,
pvs, version, vgcfgrestore -l, vgdisplay, vgs.
[Needs checking.]

Non-essential messages are shifted from log level 4 to log level 5
for syslog and lvm2_log_fn purposes.
2012-08-25 20:35:48 +01:00
Zdenek Kabelac
7b300a803c cleanup: add some missing stack backtraces 2012-08-23 14:38:48 +02:00
Zdenek Kabelac
fd417db274 check: add internal errors for unexpected paths
Adding couple INTERNAL_ERROR reports for unwanted parameters:

Ensure the 'top' metadata node cannot be NULL for lvmetad.

Make obvious vginfo2 cannot be NULL.

Report internal error if handler and vg is undefined.

Check for handle in poll_vg().

Ensure seg is not NULL in dev_manager_transient().

Report missing read_ahead for _lv_read_ahead_single().

Check for report handler in dm_report_object().

Check missing VG in _vgreduce_single().
2012-08-23 14:37:52 +02:00
Zdenek Kabelac
286cd2006b cleanup: drop unneeded included header files
This headers were not resolving anything used for compiled .c files.
Remove unused util.c file.
2012-08-23 14:37:20 +02:00
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
Zdenek Kabelac
8a81716325 Minor fixes
Just small updates and remove <backtrace> after log_error.
2012-03-28 11:11:25 +00:00
Zdenek Kabelac
0f2bbb8763 Removing call of release_vg(NULL)
Since we are in error path were vg must be always NULL,
skip call of release_vg() like we do in other places.
2012-03-12 14:43:12 +00:00
Zdenek Kabelac
aa9ebf4494 Switch to normal log_verbose message
Here it's not an error case - so do not push this message to stderr.
2012-03-12 14:18:28 +00:00
Alasdair Kergon
9c159ea320 Pass struct device around internally rather than dev_t.
Add 3rd daemon return state "unknown" for lookups that are carried out
successfully but don't find the item requested.
Avoid issuing error messages when it's expected that a device that's
being looked up in lvmetad might not be there.
2012-03-02 20:46:36 +00:00
Alasdair Kergon
d742cdf327 Change pvscan --lvmetad to pvscan --cache. 2012-03-02 18:09:46 +00:00
Zdenek Kabelac
2455ce226d Fix leak of FID structure 2012-03-01 09:46:38 +00:00
Alasdair Kergon
5b613cff97 Pass 'single_device' parameter down to suppress 'Can't find uuid' messages
when reading VG text metadate and called from pvscan --lvmetad.

(Longer-term, that check needs moving outside of that code.)
2012-02-29 02:35:35 +00:00
Petr Rockai
996fe0a836 Fix a whitespace bug in the last checkin. 2012-02-29 00:19:14 +00:00
Petr Rockai
059e87ce7b Attempt a fix for lvm shell accumulating copies of orphan PVs with each "pvs"
invocation.
2012-02-29 00:18:27 +00:00
Zdenek Kabelac
0650d875e8 Test dm_hash_insert() failures mem failures 2012-02-28 11:12:58 +00:00
Zdenek Kabelac
58afa3e7fb Check error from _lv_each_dependency
_lv_mark_if_partial_collect cannot fail, however it's good to keep
checking here as we do in all other cases.
2012-02-28 11:10:45 +00:00
Zdenek Kabelac
a46cc72fd2 Add some stack traces for dev_close error paths 2012-02-28 10:11:35 +00:00
Zdenek Kabelac
b9141fcefa Add stack traces for lock_vol failures
Adding at least stack traces with some FIXMEs for cases,
where we might want to do something cleaver - maybe fail command
or give user hints something is not going well ?

For remote_backup is stack probably 'good' enough for now.
2012-02-27 11:35:59 +00:00
Zdenek Kabelac
efe228a42e Just reindent with tabs 2012-02-27 09:51:31 +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
Alasdair Kergon
d860272b00 Check all tags and LV names are in a valid form in vg_validate. 2012-02-23 00:11:01 +00:00
Zdenek Kabelac
52f2f3eae4 Add free_orphan_vg
Move commod code to destroy orphan VG into free_orphan_vg() function.
Use orphan vgmem for creation of PV lists.
Remove some free_pv_fid() calls (FIXME: check all of them)
FIXME: Check whether we could merge release_vg back again for all VGs.
2012-02-13 11:03:59 +00:00
Zdenek Kabelac
65079de265 If the same fid is already same avoid ref_counting 2012-02-13 11:01:34 +00:00
Zdenek Kabelac
960ee343f3 Add missing test for failure of lvmcache_foreach_pv 2012-02-13 10:58:20 +00:00
Zdenek Kabelac
bbf98c19a8 Log error reporting for failing _alloc_pv
Drop unneeded zeroing of zalloced memory region.
2012-02-13 10:51:52 +00:00
Alasdair Kergon
b719e3d323 FMT_INSTANCE_VG is redundant now 2012-02-12 23:01:19 +00:00
Alasdair Kergon
10670c641b remove unused bits after fid changes 2012-02-12 20:19:39 +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
Petr Rockai
8e5f7cf3dc Move lvmcache data structures behind an API (making the structures private to
lvmcache.c). No functional change.
2012-02-10 01:28:27 +00:00
Zdenek Kabelac
462835faa0 Switch to return void
List delete cannot fail, so there is no reason to test for error.
2012-02-08 12:52:58 +00:00
Zdenek Kabelac
c217690f4c Thin dependency scan support
Go through pool_lv and metadata_lv LVs when doing recursive scan.
2012-01-25 08:50:10 +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
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
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
eafbdf3029 Don't print char type[8] as a plain string
pvck prints 'extra' character from the label since there is no '\0'
after the struct label entry and just uint64_t follows directly.
So avoid it by limiting 8 chars to be printed.

https://www.redhat.com/archives/lvm-devel/2011-January/msg00109.html

Signed-off-by: Paul Bolle <pebolle tiscali nl>
2011-10-24 10:24:39 +00:00
Zdenek Kabelac
d4f134b8f6 Check for refresh_filter failure
Properly detect if the filters were refreshed properly.

(May needs few more fixes ??)

Filter refresh may fail because it may be out of free file descriptors
when clvmd gets overloaded.
2011-10-11 09:09:00 +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
f32b76a193 Minor change for pv_create api
Switch int to unsigned type.
2011-09-07 08:34:21 +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
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
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
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
bebe60b70c Code move of vg_mark_partial() up in stack
It's useful to keep the partial flag cached - so just move the call
for vg_mark_partil_lvs() into import_vg_from_config_tree() so it gets
evaluated before it goes through the lvmcache.

This patch should not present any functional change.

Note: It is rather temporal solution - proper place is probably inside the
'read' call back - but needs some more discussion.
For now using this minor hack.
2011-06-17 14:39:10 +00:00
Petr Rockai
6d25c0d26f Fix RHBZ 651590 (failure to lock LV results in failure to repair mirror after
transient error), stemming from the following sequence of events:

1) devices fail IO, triggering repair
2) dmeventd starts fixing up the mirror
3) during the downconversion, a new metadata version is written

--> the devices come back online here

4) the mirror device suspend/resume is called to update DM tables
5) during the suspend/resume cycle, *pre*-commit metadata is read;
   however, since the failed devices are now back online, we get back
   inconsistent set of precommit metadata and the whole operation fails

The patch relaxes the check that fails in step 5 above, namely by ignoring
inconsistencies coming from PVs that are marked MISSING.
2011-06-15 17:45:02 +00:00
Alasdair Kergon
3cac20f850 Defer writing PV labels to vg_write.
Store label_sector only in struct physical_volume.
2011-06-01 19:29:31 +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
Zdenek Kabelac
b680d5bf7b Fix use of released vgname and vgid
Avoid using of already released memory when duplicated MDA is found.

As get_pv_from_vg_by_id() may call lvmcache_label_scan() use the local copy
of the vgname and vgid on the stack as vginfo may dissapear and code was
then accessing garbage in memory.

i.e.  pvs  /dev/loop0
(when /dev/loop0 and /dev/loop1 has same MDA content)

Invalid read of size 1
   at 0x523C986: dm_hash_lookup (hash.c:325)
   by 0x440C8C: vginfo_from_vgname (lvmcache.c:399)
   by 0x4605C0: _create_vg_text_instance (format-text.c:1882)
   by 0x46140D: _text_create_text_instance (format-text.c:2243)
   by 0x47EB49: _vg_read (metadata.c:2887)
   by 0x47FBD8: vg_read_internal (metadata.c:3231)
   by 0x477594: get_pv_from_vg_by_id (metadata.c:344)
   by 0x45F07A: _get_pv_if_in_vg (format-text.c:1400)
   by 0x45F0B9: _populate_pv_fields (format-text.c:1414)
   by 0x45F40F: _text_pv_read (format-text.c:1493)
   by 0x480431: _pv_read (metadata.c:3500)
   by 0x4802B2: pv_read (metadata.c:3462)
 Address 0x652ab80 is 0 bytes inside a block of size 4 free'd
   at 0x4C2756E: free (vg_replace_malloc.c:366)
   by 0x442277: _free_vginfo (lvmcache.c:963)
   by 0x44235E: _drop_vginfo (lvmcache.c:992)
   by 0x442B23: _lvmcache_update_vgname (lvmcache.c:1165)
   by 0x443449: lvmcache_update_vgname_and_id (lvmcache.c:1358)
   by 0x443C07: lvmcache_add (lvmcache.c:1492)
   by 0x46588C: _text_read (text_label.c:271)
   by 0x466A65: label_read (label.c:289)
   by 0x4413FC: lvmcache_label_scan (lvmcache.c:635)
   by 0x4605AD: _create_vg_text_instance (format-text.c:1881)
   by 0x46140D: _text_create_text_instance (format-text.c:2243)
   by 0x47EB49: _vg_read (metadata.c:2887)

Add testing script
2011-04-21 13:13:40 +00:00
Zdenek Kabelac
a1eba521e3 Fix some unmatching sign comparation gcc warnings
Simple replacement for unsigned type - usually in for() loops.
2011-04-08 14:40:18 +00:00
Peter Rajnoha
29684f590c Cleanup fid finalization code in free_vg and allow exactly the same fid to be set again for a PV/VG.
Actually, we can call vg_set_fid(vg, NULL) instead of calling
destroy_instance for all PV structs and a VG struct - it's the same
code we already have in the vg_set_fid.

Also, allow exactly the same fid to be set again for the same PV/VG
Before, this could end up with the fid destroyed because we destroyed
existing fid first and then we used the new one and we didn't care
whether existing one == new one by chance.
2011-04-01 14:54:20 +00:00
Zdenek Kabelac
3d04380691 Use created hash tables for quick check of LV, PV.
Instead of searching linear list of all LVs, PVs - use created hash tables
also for quick mapping between LV.

(Note - for small number of PVs or LVs the overhead of the hash is bigger).

TODO: Use hash tables in volume_group structure directly.
2011-03-30 13:35:51 +00:00
Zdenek Kabelac
1bedd3a97b Use id_equal instead of strncmp()
More consistent and easier to read.
2011-03-29 21:57:56 +00:00
Zdenek Kabelac
b8ccce3500 Add missing \0 for grown debug object
Attach \0 for proper char* display - otherwise somewhat random message could
be displayed in debug more and read of unpredictable read of uninitilized
memory values could happen.
2011-03-14 17:00:57 +00:00
Zdenek Kabelac
844b75f4d6 Fix allocation of system_id
As code uses strncpy(system_id, NAME_LEN) and doesn't set '\0'
Fix it by always allocating NAME_LEN + 1 buffer size and with zalloc
we always get '\0' as the last byte.

This bug may trigger some unexpected behavior of the string operation
code - depends on the pool allocator.

FIXME: refactor this code to alloc_vg.
2011-03-13 23:05:48 +00:00
Peter Rajnoha
ff4479414c Use format instance mempool where possible and adequate. 2011-03-11 15:10:16 +00:00
Peter Rajnoha
e8d4946ec7 Various cleanups for fid mem and ref_count changes.
Missing free_vg on error_path in lvmcache_get_vg fn. Call destroy_instance
only if the fid is not part of the vg in backup_read_vg fn (otherwise it's
part of the VG we're returning and we definitely don't want to destroy it!).
2011-03-11 15:08:31 +00:00
Peter Rajnoha
2feb2a66fd Call destroy_instance for any PVs found in VG structure during vg_free call.
This is necessary for proper format instance ref_count support. We iterate
over vg->pvs and vg->removed_pvs list and the ref_count is decremented and
then it is destroyed if not referenced anymore.
2011-03-11 15:06:13 +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
Peter Rajnoha
1307ddf4cf Use only vg_set_fid and new pv_set_fid fn to assign the format instance.
This is essential for proper format instance ref_count support. We must
use these functions to set the fid everywhere from now on, even the NULL
value!
2011-03-11 14:50:13 +00:00
Peter Rajnoha
a1bec4e685 Add mem and ref_count fields to struct format_instance for own mempool use.
Format instances can be created anytime on demand and it contains
metadata area information mostly (at least for now, but in the future,
we may store more things here to update/edit in a PV/VG). In case we
have lots of metadata areas, memory consumption will rise. Using cmd
context mempool is not quite optimal here because it is destroyed too
late. So let's use a separate mempool for format instances.

Reference counting is used because fids could be shared, e.g. each PV
has either a PV-based fid or VG-based fid. If it's VG-based, each PV has
a shared fid with the VG - a reference to VG's fid.
2011-03-11 14:38:38 +00:00
Peter Rajnoha
56f5b12eed Use new alloc_fid fn for common format instance initialisation. 2011-03-11 14:30:27 +00:00
Zdenek Kabelac
a6f38f9d6a Missed merge fix in vg_validate patch 2011-03-10 22:39:36 +00:00
Zdenek Kabelac
442dbf9ad8 Refactor code for _lv_postoder
Add _lv_postorder_vg() - for calling _lv_postorder() for every LV from VG.
We use this in 2 places -  vg_mark_partial_lvs() and vg_validate()
so make it as a one function.

Benefit here is - to use only one cleanup code and avoid
potentially duplicate scans of same LVs.
2011-03-10 14:40:32 +00:00
Zdenek Kabelac
4ee2b4965f Use hash tables for validating names
Accelerate validation loop by using lvname, lvid, pvid hash tables.
Also merge pvl loop into one cycle now - no need to scan the list twice.
List scan is stopped when dm_hash_insert fails.

The error message with loop_counter1 is no longer provided - however
the message has been misleading anyway.
2011-03-10 13:11:59 +00:00
Zdenek Kabelac
3019419e95 Refactor vg allocation code
Create new function alloc_vg() to allocate VG structure.

It takes pool_name (for easier debugging).
and also take vg_name to futher simplify code.

Move remainder of _build_vg_from_pds  to _pool_vg_read
and use vg memory pool for import functions.
(it's been using smem -> fid mempool -> cmd mempool)
(FIXME: remove mempool parameter for import functions and use vg).

Move remainder of the _build_vg to _format1_vg_read
2011-03-10 12:43:29 +00:00
Peter Rajnoha
3b97e8d643 Allow non-orphan PVs with two metadata areas to be resized.
We allow writing non-orphan PVs only for resize now. The "orphan PV" assert
in pv_write fn uses the "allow_non_orphan" parameter to control this assert.
However, we should find a more elaborate solution so we can remove this
restriction altogether (pv_write together with vg_write is not atomic, we
need to find a safe mechanism so there's an easy revert possible in case of
an error).
2011-02-28 13:19:02 +00:00
Peter Rajnoha
4a304dc1d8 Allow only orphan PVs to be resized even with two metadata areas. 2011-02-25 14:08:54 +00:00
Peter Rajnoha
f74bd57ec9 Revert the patch for vgconvert to work with recent changes in metadata area handling.
This should work now with the help of the patch from previous commit.
2011-02-25 14:02:53 +00:00
Peter Rajnoha
38b0564cab Read PV metadata information from cache if pv_setup called with pv->fid == vg->fid.
If the PV is already part of the VG (so the pv->fid == vg->fid), it makes no
sense to attach the mdas information from PV to a VG. Instead, we read new
PV metadata information from cache and attach it to the VG fid.
2011-02-25 13:59:47 +00:00
Peter Rajnoha
6bdc80743e Fix vgconvert code to work with changes in metadata area handling and changes
in format_instance. Add new 'vg_convert' function.
2011-02-21 12:29:21 +00:00
Peter Rajnoha
17ad2b1115 Change pv_write code to work with the changes in metadata handling interface
and changes in format_instance.
2011-02-21 12:26:27 +00:00
Peter Rajnoha
94d91fdda1 Change the code throughout to use new pv_initialise and modified pv_setup fn.
Change pv_create code to work with these changes together with using new
pv_add_metadata_area fn to add metadata areas for a PV being created.
2011-02-21 12:24:15 +00:00
Peter Rajnoha
305816232d Remove useless mdas parameter for pv_read (from now on, we store mdas in a
format instance)
2011-02-21 12:15:59 +00:00
Peter Rajnoha
6e0b348d34 Add format instance support for pv_read code. 2011-02-21 12:13:40 +00:00
Peter Rajnoha
56280d0d3a Initialise a new PV-based format instance for a PV that is being created. 2011-02-21 12:12:32 +00:00
Peter Rajnoha
f8b78ec613 Add vg_set_fid function to change VG format instance.
This function also sets a reference to a new VG format instance for all PVs
that are part of the VG so the PV-VG interconnection is consistent after the
change.
2011-02-21 12:10:58 +00:00
Peter Rajnoha
c0c21864c6 Change the code throughout for recent changes in format_instance handling. 2011-02-21 12:07:03 +00:00
Peter Rajnoha
88129db5e1 Change create_instance to create PV-based as well as VG-based format instances.
Add supporting functions to work with the format instance and metadata area
structures stored within the format instance. Add support for simple indexing
of metadata areas using PV id and mda order (for on-disk PV only for now, we
can extend the indexing even for other mdas if needed - we only need to define
a proper key for the index).
2011-02-21 12:05:49 +00:00
Zdenek Kabelac
aec2115410 Const fixing
Fixing some const warnings - with API change in:

int vg_extend(struct volume_group *vg, int pv_count, const char *const *pv_names,

Change is needed - as lvm2api expects const behaviour here.
So vg_extend() is doing local strdup for unescaping.

skip_dev_dir return const char* from const char* vg_name.

Rest of the patch is cleanup of related warnings.

Also using dm_report_filed_string() API change to simplify
casting in _string_disp and _lvname_disp.
2011-02-18 14:47:28 +00:00
Zdenek Kabelac
b1bcff7424 Critical section
New strategy for memory locking to decrease the number of call to
to un/lock memory when processing critical lvm functions.

Introducing functions for critical section.

Inside the critical section - memory is always locked.
When leaving the critical section, the memory stays locked
until memlock_unlock() is called - this happens with
sync_local_dev_names() and sync_dev_names() function call.

memlock_reset() is needed to reset locking numbers after fork
(polldaemon).

The patch itself is mostly rename:

memlock_inc  -> critical_section_inc
memlock_dec  -> critical_section_dec
memlock      -> critical_section

Daemons (clmvd, dmevent) are using memlock_daemon_inc&dec
(mlockall()) thus they will never release or relock memory they've
already locked memory.

Macros sync_local_dev_names() and sync_dev_names() are functions.
It's better for debugging - and also we do not need to add memlock.h
to locking.h header (for memlock_unlock() prototyp).
2011-02-18 14:16:11 +00:00
Zdenek Kabelac
794e94fe16 Replace PV_MIN_SIZE with function pv_min_size()
Add configurable option to define minimal size of
of block device usable as a PV.

pv_min_size() is added to lvm-globals and it's being
initialized through _process_config.

Macro PV_MIN_SIZE is unused and removed.

New define DEFAULT_PV_MIN_SIZE_KB is added to lvm-global
and unlike PV_MIN_SIZE it uses KB units.

Should help users with various slow devices attached to the system,
which cannot be easily filtered out (like FDD on /dev/sdX):
https://bugzilla.redhat.com/show_bug.cgi?id=644578
2011-02-18 14:11:22 +00:00
Petr Rockai
21849a8587 Fix an lv_postorder bug where it failed to clear temporary flags, making it
impossible to use twice with the same LV(s). Discovered by Milan.
2011-02-14 19:27:05 +00:00
Alasdair Kergon
a8de276520 Replace fs_unlock by sync_local_dev_names to notify local clvmd. (2.02.80)
Introduce sync_local_dev_names and CLVMD_CMD_SYNC_NAMES to issue fs_unlock.
2011-01-12 20:42:50 +00:00
Zdenek Kabelac
2ae2ca89bf Add backtraces for backup and backup_remove fail paths 2010-12-22 15:36:41 +00:00
Petr Rockai
ebfe96cad5 Add further consistency checking to vg_validate, ensuring that all segment
areas point to LVs or PVs that are listed in the respective VG.
2010-12-14 17:51:09 +00:00
Petr Rockai
75b2f3507a Add a validation step for pvmoveN internal LVs to vg_validate. 2010-12-14 17:07:35 +00:00
Alasdair Kergon
acb037657c Fix scanning of VGs without in-PV mdas.
Set cmd->independent_metadata_areas if metadata/dirs or disk_areas in use.
- Identify and record this state.

Don't skip full scan when independent mdas are present even if memlock is set.
- Clusters and OOM aren't supported, so no problem doing the proper scans.

Avoid revalidating the label cache immediately after scanning.
- A simple optimisation.

Support scanning for a single VG in independent mdas.
- Not used by the fix but I left it in anyway as later patches might use it.
2010-12-10 22:39:52 +00:00
Alasdair Kergon
2b82bd79f5 Rename vg_release to free_vg. 2010-12-08 20:50:48 +00:00
Zdenek Kabelac
54fca7b1ca Remove reset of vg->vgmem pointer as it is access of already release memory
This reset of vgmem pointer causes access of already released memory.
(_vg_make_handle allocates vg from vgmem pool itself - which is a bit tricky)

Interestingly this memory fault was missed by our test suite.
2010-12-08 10:45:37 +00:00
Petr Rockai
97e8048e05 Avoid the automatic MISSING_PV recovery path in commands with special
MISSING_PV handling (cmd->handles_missing_pvs is set).
2010-11-30 11:15:54 +00:00
Alasdair Kergon
1415afcdba Fix memory leak when VG allocation policy in metadata is invalid.
Ignore unrecognised allocation policy found in metadata instead of aborting.
Fix another missing vg_release() in _vg_read_by_vgid.
2010-11-29 18:35:37 +00:00
Zdenek Kabelac
201222ebad Reset vg pointer after release
Set vg to NULL after releasing it as the following memlock() test may
lead to goto for the second call of vg_release() with the already
released vg pointer.
2010-11-29 11:08:14 +00:00
Alasdair Kergon
728074ac83 Suppress 'No PV label' message when removing several PVs without mdas. 2010-11-23 01:55:53 +00:00
Alasdair Kergon
eb82bd0525 Extend cling allocation policy to recognise PV tags (cling_by_tags).
Add allocation/cling_tag_list to lvm.conf.
2010-11-09 12:34:40 +00:00
Alasdair Kergon
2aa06d73ca pre-release 2010-10-25 13:54:29 +00:00
Zdenek Kabelac
91e56ffb29 Fix constness warning for _vg_read_by_vgid() uuid usage 2010-10-25 13:35:13 +00:00
Alasdair Kergon
b83af51668 Add global/metadata_read_only to use unrepaired metadata in read-only cmds. 2010-10-25 11:20:54 +00:00
Zdenek Kabelac
7c9fd3ea84 Don't use floor() in _bitset_with_random_bits
Use _even_rand() function instead of floor() in _bitset_with_random_bits().
floor() function is missing in dietlibc (on architectures other than x86).
Moreover using floor() to clip rand results does not assure even result
distribution. _even_rand() uses integer arithmetic only and is designed to
return evenly distributed results.

> Looks OK to me. It took a while to decipher what is the exact meaning of
> the loop in _even_rand (to a non-pseudorandomness-expert) but I am
> fairly comfortable with it now. If I understand this correctly, it
> rejects numbers that come from an "incomplete" slice of the RAND_MAX
> space (considering the number space [0, RAND_MAX] is divided into some
> "max"-sized slices and at most a single smaller slice, between [n*max,
> RAND_MAX] for suitable n -- numbers from this last slice are discarded
> because they could distort the distribution in favour of smaller
> numbers).

Signed-off-by: Przemyslaw Iskra <sparky <at> pld-linux.org>
Reviewed-by: Petr Rockai <prockai <at> redhat.com>
2010-10-13 12:18:53 +00:00
Dave Wysochanski
637ac19e60 Rename 'flags' to 'status' for struct metadata_area.
In other LVM memory structures such as volume_group, the field
used to store flags is called "status", and on-disk fields are called
'flags', so rename the one inside metadata_area to be consistent.
Not only is it more consistent with existing code but is cleaner
to say "the status of this mda is ignored".

Background for this patch - prajnoha pinged me on IRC this morning
about a fix he was working on related to metadataignore when
metadata/dirs was set.  I was reviewing my patches from this year
and realized the 'flags' field was probably not the best choice
when I originally did the metadataignore patches.
2010-10-05 17:34:05 +00:00
Dave Wysochanski
0ca1492ca5 Fix copyright dates on new files lib/metadata/{lv|vg|pv}.[ch]. 2010-09-30 20:47:18 +00:00
Dave Wysochanski
f15033c0e1 Add tags_format_and_copy() common function and call from _tags_disp.
Add a common function to allocate memory and format a string of
tags.
Call tags_format_and_copy() from _tags_disp().
2010-09-30 14:08:07 +00:00
Dave Wysochanski
14663348d0 Add {pv|vg|lv}_attr_dup() functions and refactor 'disp' functions.
Move the creating of the 'attr' strings into a common function so
they can be called from the 'disp' functions as well as the new
'get' property functions.
Add "_dup" suffix to indicate memory is allocated.
Refactor pvstatus_disp to take pv argument and call pv_attr_dup().
2010-09-30 13:52:55 +00:00
Dave Wysochanski
b171907fc5 Refactor metadata.[ch] into lv.[ch] for lv functions.
This patch is similar to the other patches for pv and vg
functionality, and separates lv functionality into separate
files, concentrating on reporting fields and simple functions.
2010-09-30 13:05:45 +00:00
Dave Wysochanski
f42b708eae Refactor metadata.[ch] into pv.[ch] for pv functions.
The metadata.[ch] files are very large.  This patch makes a first
attempt at separating out pv functions and data, particularly
related to the reporting fields calculations.

More code could be moved here but for now I'm stopping at reporting
functions 'get' / 'set' functions.
2010-09-30 13:05:20 +00:00
Dave Wysochanski
81f0124a58 Refactor metadata.[ch] into vg.[ch] for vg functions.
The metadata.[ch] files are very large.  This patch makes a first
attempt at separating out vg functions and data, particularly
related to the reporting fields calculations.
2010-09-30 13:04:55 +00:00
Peter Rajnoha
bad35c6554 Add escape sequence for ':' and '@' found in device names used as PVs. 2010-09-23 12:02:33 +00:00
Mike Snitzer
4efb1d9cbb Update heuristic used for default and detected data alignment.
Add "devices/default_data_alignment" to lvm.conf to control the internal
default that LVM2 uses: 0==64k, 1==1MB, 2==2MB, etc.

If --dataalignment (or lvm.conf's "devices/data_alignment") is specified
then it is always used to align the start of the data area.  This means
the md_chunk_alignment and data_alignment_detection are disabled if set.

(Same now applies to pvcreate --dataalignmentoffset, the specified value
will be used instead of the result from data_alignment_offset_detection)

set_pe_align() still looks to use the determined default alignment
(based on lvm.conf's default_data_alignment) if the default is a
multiple of the MD or topology detected values.
2010-08-20 20:59:05 +00:00
Dave Wysochanski
69d67dc2ca Add vg_mda_size and vg_mda_free functions.
Add supporting functions to get vg_mda_size and vg_mda_free fields.
Should be no functional change.
2010-08-20 12:43:49 +00:00
Milan Broz
586b56b18c Fix wrong use of LCK_WRITE
In all top vg read functions only LCK_VG_READ/WRITE can be used.
All other vg lock definitions are low-level backend machinery.

Moreover, LCK_WRITE cannot be tested through bitmask.
This patch fixes these mistakes.

For _recover_vg() we do not need lock_flags, it can be only
two of above and we always upgrading to LCK_VG_WRITE lock there.
(N.B. that code is racy)

There is no functional change in code (despite wrong masking
it produces correct bits:-)
2010-08-19 23:26:31 +00:00
Milan Broz
727f7bfa49 Detect LUKS signature in pvcreate
One shiny day we should use libblkid here. But now using LUKS is
very common together with LVM and pvcreate destroys LUKS completely.

So for user's convenience, try to detect LUKS signature and allow abort.
2010-08-19 23:08:18 +00:00
Milan Broz
2d5e2b52ca Change the pvcreate swap/md logic
pvcreate detects MD and swap signature.

The logic hidden there is not only documented but it is also
user unfriendly. Who invented this logic should run pvcreate
on its own critical MD device to see why;-)

This patch
 - creates one function instead of duplication code
 - asks if user want to overwrite signature
 - allows aborting (!)
 (Please note that writing LVM signatute without wiping old
 is wrong, it confuses blkid, MD will not work anyway and
 swap and LUKS is broken too.)
2010-08-19 23:03:34 +00:00
Mike Snitzer
b123a82d73 Change default alignment of pe_start to 1MB.
The new standard in the storage industry is to default alignment of data
areas to 1MB.  fdisk, parted, and mdadm have all been updated to this
default.

Update LVM to align the PV's data area start (pe_start) to 1MB.  This
provides a more useful default than the previous default of 64K (which
generally ended up being a 192K pe_start once the first metadata area
was created).

Before this patch:
# pvs -o name,vg_mda_size,pe_start
  PV         VMdaSize  1st PE
  /dev/sdd     188.00k 192.00k

After this patch:
# pvs -o name,vg_mda_size,pe_start
  PV         VMdaSize  1st PE
  /dev/sdd    1020.00k   1.00m

The heuristic for setting the default alignment for LVM data areas is:
- If the default value (1MB) is a multiple of the detected alignment
  then just use the default.
- Otherwise, use the detected value.

In practice this means we'll almost always use 1MB -- that is unless:
- the alignment was explicitly specified with --dataalignment
- or MD's full stripe width, or the {minimum,optimal}_io_size exceeds
  1MB
- or the specified/detected value is not a power-of-2
2010-08-12 04:11:48 +00:00
Dave Wysochanski
936541ec56 Remove irrelevant comments relating to vg_mda_copies. 2010-07-30 16:47:27 +00:00
Dave Wysochanski
f77fb62b2a Add log_error when strdup fails in {vg|lv}_change_tag().
Signed-off-by: Dave Wysochanski <dwysocha@redhat.com>
2010-07-09 16:57:44 +00:00
Alasdair Kergon
08f1ddea6c Use __attribute__ consistently throughout. 2010-07-09 15:34:40 +00:00
Dave Wysochanski
a5fb2bbff3 Pass metadataignore to pv_create, pv_setup, _mda_setup, and add_mda.
Pass metadataignore through PV creation / setup paths.
As a result of this cleanup, we can remove the unnecessary setting
of mda_ignore bits inside pvcreate_single(), after call to pv_create.
For now, just set metadataignore to '0' in some places.  This is
equivalent to the prior functionality, although the 0 is given
by the caller not hardcoded in _mda_setup() call.

Signed-off-by: Dave Wysochanski <dwysocha@redhat.com>
2010-07-08 18:24:29 +00:00