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Commit Graph

502 Commits

Author SHA1 Message Date
Zdenek Kabelac
81beded3af Add lv_activate_opts structure
To avoid modification of 'read-only' volume group structure
add a new structure to pass local data around the code for LV
activation.

As origin_only is one such flag - replace this parameter with new
struct lv_activate_opts.

More parameters might eventually become part of lv_activate_opts.
2011-06-17 14:14:19 +00:00
Alasdair Kergon
7df72b3c88 Fix last snapshot removal to avoid table reload while a device is suspended. 2011-06-13 22:28:04 +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
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
Zdenek Kabelac
aaf92617b0 Fix -Wold-style-definition gcc warnings 2011-03-29 20:30:05 +00:00
Milan Broz
52a5cd31c4 Mitigate some warnings if running as non-root user.
LVM doesn't behave correctly if running as non-root user,
there is warning when it detects it.

Despite this, it produces many error messages, saying nothing.
See https://bugzilla.redhat.com/show_bug.cgi?id=620571

This patch fixes two things:
1) Removes eror message from device_is_usable() which has no
information value anyway (real warning is printed inside it).

2) it fixes device-mapper initialization, if we support
core dm module autoload and device node is present, it should
fail early and not try recreate existing and correct node.
(non-root == permission denied here)

N.B. In future code should support user roles, some more
drastic checks in code are probably contraproductive now.
2011-03-18 12:17:57 +00:00
Zdenek Kabelac
36653e8903 Add fall through comments
Add comments to switch case construct.
2011-02-28 19:53:03 +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
ab8b85fb80 Fix !DEVMAPPER_SUPPORT build
Fix build when devmapper is disabled.
2011-02-18 14:29:39 +00:00
Zdenek Kabelac
44376ffe22 Remove fs_unlock after failed suspend
Explicit fs_unlock() after failed suspend is not need -
as it will happen automatically with nearest lv_info()
or vg_unlock().
2011-02-18 14:26:31 +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
Jonathan Earl Brassow
c054e7cc56 Fix for bug 677739: removing final exclusive cmirror snapshot,
results in clvmd deadlock

When a logical volume is activated exclusively in a cluster, the
local (non-cluster-aware) target is used.  However, when creating
a snapshot on the exclusive LV, the resulting suspend/resume fails
to load the appropriate device-mapper table - instead loading the
cluster-aware target.

This patch adds an 'exclusive' parameter to the pertinent resume
functions to allow for the right target type to be loaded.
2011-02-18 00:36:04 +00:00
Alasdair Kergon
6c7b95f281 pre-release 2011-02-04 22:07:43 +00:00
Jonathan Earl Brassow
27ff8813da Allow snapshots in a cluster as long as they are exclusively
activated.

In order to achieve this, we need to be able to query whether
the origin is active exclusively (a condition of being able to
add an exclusive snapshot).

Once we are able to query the exclusive activation of an LV, we
can safely create/activate the snapshot.

A change to 'hold_lock' was also made so that a request to aquire
a WRITE lock did not replace an EX lock, which is already a form
of write lock.
2011-02-04 20:30:17 +00:00
Zdenek Kabelac
f5f6dcbc62 Fix operation node stacking for consecutive dm ops
With the ability to stack many operations in one udev transaction -
in same cases we are adding and removing same device at the same time
(i.e. deactivate followed by activate).

This leads to a problem of checking stacked operations:
i.e. remove /dev/node1 followed by create /dev/node1

If the node creation is handled with udev - there is a problem as
stacked operation gives warning about existing node1 and will try to
remove it - while next operation needs to recreate it.

Current code removes all previous stacked operation if the fs op is
FS_DEL - patch adds similar behavior for FS_ADD - it will try to
remove any 'delete' operation if udev is in use.

For FS_RENAME operation it seems to be more complex. But as we
are always stacking FS_READ_AHEAD after FS_ADD operation -
should be safe to remove all previous operation on the node
when udev is running.

Code does same checking for stacking libdm and liblvm operations.

As a very simple optimization counters were added for each stacked ops
type to avoid unneeded list scans if some operation does not exists in
the list.

Enable skipping of fs_unlock() (udev sync) if only DEL operations are staked.
as we do not use lv_info for already deleted nodes.
2011-02-04 19:14:39 +00:00
Zdenek Kabelac
3a00204a23 Remove fs_unlock from lv_resume path
Keep it within clvmd until message for SYNC starts to work.
2011-02-03 01:58:20 +00:00
Zdenek Kabelac
401a40d941 Do not check for open_count when not needed.
Disable open_count checking in lv_info it it's not used.

Fix previous commit (comment out unsable code for now).
2011-02-03 01:24:46 +00:00
Zdenek Kabelac
56cab8cc03 Synchronize with udev for lv_info
In case the open_count is requested via lv_info - check if there
are any udev operations in-progress - and wait for them
before checking for lv_info
2011-02-03 01:16:35 +00:00
Zdenek Kabelac
b1b38215ba Add exec_cmd paramater sync_needed
As sync_local_dev_names() cannot be called within activation context,
add new parametr which allows to select if the sync call is needed
before executing new command.
2011-01-13 14:51:32 +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
937a21f0d2 Speedup consequent activation calls
Stop calling fs_unlock() from lv_de/activate().
Start using internal lvm fs cookie for dm_tree.
Stop directly calling dm_udev_wait() and
dm_tree_set/get_cookie() from activate code -
it's now called through fs_unlock() function.

Add lvm_do_fs_unlock()

Call fs_unlock() when unlocking vg where implicit unlock solves the
problem also for cluster - thus no extra command for clustering
environment is required - only lvm_do_fs_unlock() function is added
to call lvm's fs_unlock() while holding lvm_lock mutex in clvmd.

Add fs_unlock() also to set_lv() so the command waits until devices
are ready for regular open (i.e. wiping its begining).

Move fs_unlock() prototype to activation.h to keep fs.h private
in lib/activate dir and not expose other functions from this header.
2011-01-10 14:02:30 +00:00
Zdenek Kabelac
f6fdfd56e4 Add internal fs cookie
Add functions for handling internal lvm cookie used for
all dm_tree operations until fs_unlock is called.
2011-01-10 13:44:39 +00:00
Zdenek Kabelac
006e5fa0ea Add missing error path tests 2011-01-05 14:03:36 +00:00
Zdenek Kabelac
bd43da4f9d Hide unused code into if 0
Make it obvious for lcov coverage and static analyzis we
are not interested in this piece of code.
2010-12-22 15:32:15 +00:00
Zdenek Kabelac
f2554b9d2a Remove dead assignment of segh
Variable 'segh' is never read again after this assignment.
2010-12-20 14:04:43 +00:00
Zdenek Kabelac
d40d166f91 Switch void* to char* arithmetic 2010-12-20 13:37:26 +00:00
Zdenek Kabelac
760d1fac55 Add more strict const pointers around config tree
To have better control were the config tree could be modified use more
const pointers and very carefully downcast them back to non-const
(for config tree merge).
2010-12-20 13:12:55 +00:00
Peter Rajnoha
7dfce0e467 Add new dm_prepare_selinux_context fn to libdevmapper and use it throughout.
Detect existence of new SELinux selabel interface during configure.
Use new dm_prepare_selinux_context instead of dm_set_selinux_context.

We should set the SELinux context before the actual file system object creation.
The new dm_prepare_selinux_context function sets this using the selabel_lookup
fn in conjuction with the setfscreatecon fn. If selinux/label.h interface
(that should be a part of the selinux library) is not found during configure,
we fallback to the original matchpathcon function instead.
2010-12-13 10:43:56 +00:00
Alasdair Kergon
2b82bd79f5 Rename vg_release to free_vg. 2010-12-08 20:50:48 +00:00
Alasdair Kergon
e8bed35ddf Cope better with an undefined target_percent operation in _percent_run. 2010-12-08 19:26:35 +00:00
Zdenek Kabelac
81e606ab2c Remove check for lv is NULL
'lv' is deferenced in the begining of the function so any check
later is not helpful.

Parameters for dev_manager_transien() are marked as nonnull.
2010-11-30 22:28:06 +00:00
Petr Rockai
8191fe4f4a Refactor the percent (mirror sync, snapshot usage) handling code to use
fixed-point values instead of a combination of a float value and an enum.
2010-11-30 11:53:31 +00:00
Zdenek Kabelac
0a178d853a Add missing closedir() - fixes resource leak 2010-11-23 15:28:54 +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
Peter Rajnoha
f7e3a19f75 Clarify error messages when activation fails due to activation filter use. 2010-11-05 18:18:11 +00:00
Zdenek Kabelac
2955b913ea Use new status code from fsadm check
Patch updates exec_cmd() and adds 3rd parameter with pointer for
status value, so caller might examine returned status code.
If the passed pointer is NULL, behavior is unmodified.

Patch allows to confinue with lvresize if the failure from fsadm check is
caused by mounted filesystem as many of filesystem resize tools do support
online filesystem resize. (originally user had to use flag '-n' to bypass
this filesystem check)
2010-11-01 14:17:35 +00:00
Alasdair Kergon
727d065f6e restrict last checkin to devs consisting entirely of error target 2010-10-25 10:37:34 +00:00
Mike Snitzer
06808d3357 Never scan a device which is using the error target
A merged snapshot's DM device is made to use the "error" target as part
of lvm's transaction to merge a snapshot.  This snapshot merge use-case
aside, any device using the error target shouldn't be scanned.
2010-10-24 17:36:58 +00:00
Mike Snitzer
9443b5d4cd Convey need for snapshot-merge target in lvconvert error message and man
page.

Add ->target_name to segtype_handler to allow a more specific target
name to be returned based on the state of the segment.

Result of trying to merge a snapshot using a kernel that doesn't have
the snapshot-merge target:

Before:
# lvconvert --merge vg/snap
  Can't expand LV lv: snapshot target support missing from kernel?
  Failed to suspend origin lv

After:
# lvconvert --merge vg/snap
  Can't process LV lv: snapshot-merge target support missing from kernel?
  Failed to suspend origin lv
  Unable to merge LV "snap" into it's origin.
2010-10-13 21:26:37 +00:00
Jonathan Earl Brassow
a71d6051ed This patch fixes a potential for I/O to hang and LVM commands
to block when a mirror under a snapshot suffers a failure.

The problem has to do with label scanning.  When a mirror suffers
a failure, the kernel blocks I/O to prevent corruption.  When
LVM attempts to repair the mirror, it scans the devices on the
system for LVM labels.  While mirrors are skipped during this
scanning process, snapshot-origins are not.  When the origin is
scanned, it kicks up I/O to the mirror (which is blocked)
underneath - causing the label scan (an thus the repair operation)
to hang.

This patch simply bypasses snapshot-origin devices when doing
labels scans (while ignore_suspended_devices() is set).  This
fixes the issue.
2010-08-26 14:21:50 +00:00
Alasdair Kergon
22149572e8 Use 'SINGLENODE' instead of 'dead' in clvmd singlenode messages.
Ignore snapshots when performing mirror recovery beneath an origin.
Pass LCK_ORIGIN_ONLY flag around cluster.
Add suspend_lv_origin and resume_lv_origin using LCK_ORIGIN_ONLY.
2010-08-17 19:25:05 +00:00
Alasdair Kergon
2d6fcbf67d Allow internal suspend and resume of origin without its snapshots. 2010-08-17 16:25:32 +00:00
Alasdair Kergon
85ed403002 Fix dev_manager_transient to access -real device not snapshot-origin. (brassow)
Another reminder why cloning functions impedes maintenance.
2010-08-17 01:51:12 +00:00
Alasdair Kergon
f92b4f9482 Monitor origin -real device below snapshot instead of overlay device. (brassow) 2010-08-17 01:16:41 +00:00
Alasdair Kergon
85a80e0505 Don't really change monitoring status when in test mode. 2010-08-16 23:29:09 +00:00
Alasdair Kergon
d1e8046f56 Various small cleanups and fixes related to monitoring. 2010-08-16 22:54:35 +00:00
Petr Rockai
f3ad0dcfde Never scan internal LVM devices. 2010-08-09 14:05:16 +00:00
Zdenek Kabelac
3eadbbeb12 Fix const warning in dev_manager_info() and _dev_manager_lv_rmnodes(). 2010-08-03 13:13:01 +00:00
Peter Rajnoha
3122f963b0 Addendum for previous patch - show VG/LV name everywhere so the messages
are consistent.
2010-07-12 12:38:35 +00:00
Peter Rajnoha
fefa43235f Add more verbose messages while checking volume_list and hosttags settings.
This should bring less confusion when there are some settings left and
people just forgot about it and then they run into problems. These messages
should give them a hint of what's really going on.
2010-07-12 11:37:49 +00:00
Alasdair Kergon
08f1ddea6c Use __attribute__ consistently throughout. 2010-07-09 15:34:40 +00:00
Zdenek Kabelac
4ec2ae8632 Do not log backtrace in valid _lv_resume() code path 2010-07-08 12:24:04 +00:00
Petr Rockai
d345bf2cd3 Account for mirror transient status when doing lvconvert --repair. 2010-05-24 15:32:20 +00:00
Zdenek Kabelac
4ef2bf27a7 Update Copyright date for resently modifed files 2010-05-24 09:04:27 +00:00
Zdenek Kabelac
591fc4d2d1 Replicator: add replicator to dtree
Adding all replicator related LVs to dtree.
Start of one replicator_dev initiate start of all other related.
2010-05-24 09:01:05 +00:00
Zdenek Kabelac
dc7d777606 Replicator: update _create_partial_dtree()
Adding function _add_partial_replicator_to_dtree() to create
partial tree for Replicator target.

Using dm_tree_node_set_presuspend_node() for Replicator.
2010-05-21 14:47:58 +00:00
Zdenek Kabelac
9249fb12b8 Replicator: activate checks for missing vgs
Activation needs to have all remote VGs locked to pass for replicator.
So if activated LV is replicator-dev LV - read all remote VGs.
2010-05-21 14:34:01 +00:00
Milan Broz
ea9e387f87 Another one internal device layer fix... 2010-05-14 12:39:52 +00:00
Milan Broz
b8fb120ee0 Fix empty layer detection is scan devices. 2010-05-14 12:30:43 +00:00
Milan Broz
b449f0a188 Fix device_is_usable to properly detect only internal LV names. 2010-05-14 12:03:32 +00:00
Milan Broz
28e2b5b213 Skip also special lvm devices in scan (if ignore suspended is used).
This should avoid various races between dmeventd on multiple nodes
in cluster where one node already repairing device and another
run full scan and locks the device.
2010-05-13 18:38:38 +00:00
Peter Rajnoha
6ddb5ecd72 Set appropriate udev flags for reserved LVs.
There's no need for foreign udev rules to touch LVM reserved devices
(snapshot, pvmove, _mlog, _mimage, _vorigin) even if they happen to
be visible. The same applies for /dev/disk content - no need to create
any content for these devices (and so no need to run any "blkid" etc.).
This also prevents setting any inotify "watch" from udev rules on such
devices that is a source of race conditions (the rules need to honor
DM_UDEV_DISABLE_OTHER_RULES_FLAG for this to work though).
2010-04-23 14:16:32 +00:00
Mike Snitzer
1f661c5dd8 When removing a snapshot avoid preloading the origin if the
snapshot-merge target is not active.
2010-04-23 02:57:39 +00:00
Peter Rajnoha
bda3982016 Use UUIDs instead of names while processing event handlers.
Internally, we used DM names instead of UUIDs while processing event
handlers. This caused problems while trying to vgrename a VG with active LVs
where the names are being changed and so the devices were not found then.
The patch also contains a little bit of refactoring, moving "build_dlid" code
found in dev_manager.c to "build_dm_uuid", now in lvm-string.c (so we have
build_dm_uuid and build_dm_name at one place).
2010-04-14 13:01:38 +00:00
Alasdair Kergon
f55021f487 Fix incorrect removal of symlinks after LV deactivation fails. 2010-04-07 20:04:41 +00:00
Jonathan Earl Brassow
7a369d3704 Add ability to create mirrored logs for mirror LVs.
This check-in enables the 'mirrored' log type.  It can be specified
by using the '--mirrorlog' option as follows:
#> lvcreate -m1 --mirrorlog mirrored -L 5G -n lv vg

I've also included a couple updates to the testsuite.  These updates
include tests for the new log type, and some fixes to some of the
*lvconvert* tests.
2010-03-26 22:15:43 +00:00
Zdenek Kabelac
18b82048e4 mlockall() -> mlock()
This patch adds a new implementation of locking function instead
of mlockall() that may lock way too much memory (>100MB).
New function instead uses mlock() system call and selectively locks
memory areas from /proc/self/maps trying to avoid locking areas
unused during lock-ed state.

Patch also adds struct cmd_context to all memlock() calls to have
access to configuration.

For backward compatibility functionality of mlockall()
is preserved with "activation/use_mlockall" flag.

As a simple check, locking and unlocking counts the amount of memory
and compares whether values are matching.
2010-03-05 14:48:33 +00:00
Milan Broz
65752052e1 Remove lvs_in_vg_activated_by_uuid_only call.
There is no difference from lvs_in_vg_activated now,
convert all users to this call.
2010-02-24 20:01:40 +00:00
Milan Broz
ab9663f394 Always query device by uuid only.
lvm2 devices have always UUID set even if imported from lvm1 metadata.

Patch removes name argument from dev_manager_info call and converts
all activation related calls to use query by UUID.

Also it simplifies mknode call (which is the only user on mknodes parameter).
2010-02-24 20:00:56 +00:00
Petr Rockai
f59b0f3e07 Add _mlog devices to dependency trees using UUID, not name, in activation. 2010-02-23 15:49:52 +00:00
Mike Snitzer
a5ec3e3827 Refactor snapshot-merge deptree and device removal to support info-by-uuid
Add a merging snapshot to the deptree, using the "error" target, rather
than avoid adding it entirely.  This allows proper cleanup of the -cow
device without having to rename the -cow to use the origin's name as a
prefix.

Move the preloading of the origin LV, after a merge, from
lv_remove_single() to vg_remove_snapshot().  Having vg_remove_snapshot()
preload the origin allows the -cow device to be released so that it can
be removed via deactivate_lv().  lv_remove_single()'s deactivate_lv()
reliably removes the -cow device because the associated snapshot LV,
that is to be removed when a snapshot-merge completes, is always added
to the deptree (and kernel -- via "error" target).

Now when the snapshot LV is removed both the -cow and -real devices
get removed using uuid rather than device name.  This paves the way
for us to switch over to info-by-uuid queries.

Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2010-02-17 22:59:46 +00:00
Mike Snitzer
15816a3b8c Add 'fail_if_percent_unsupported' arg to _percent() and _percent_run().
We unfortunately don't yet _know_, in dev_manager_snapshot_percent(), if
a snapshot-merge target is active (activation is deferred if dev is
open); so we can't short-circuit origin devices based purely on existing
LVM LV attributes.

Set 'fail_if_percent_unsupported' in dev_manager_snapshot_percent() for
a merging origin LV, otherwise passing unsupported LV types to _percent
will lead to a default successful return with percent_range as
PERCENT_100.

For a merging origin, PERCENT_100 will result in a polldaemon that runs
infinitely (because completion is PERCENT_0).
2010-02-10 14:38:24 +00:00
Mike Snitzer
d6bf26af8e Remove false "failed to find tree node for <lv>" error from _cached_info().
When activating a merging origin it is valid, and expected, to not have
a node in the deptree for both the origin and its merging snapshot.  The
_cached_info() caller is only concerned with whether a device is open.
If there isn't a node in the tree the associated device is definitely
not open.
2010-02-08 23:28:06 +00:00
Milan Broz
4b373907f6 Always query device by using uuid only and not name in clvmd.
Otherwise confusion with the device of the same name
(but different UUID, e.g. non-lvm device) can happen.
2010-01-27 13:23:57 +00:00
Milan Broz
b1ef9cd0ad Fix return code of info callbacks.
In dev_manager_info 0 means error and 1 info is returned,
not that device exists (that value is part of info struct).

Fix query by uuid only (no name) which returns 0 when device
does not exist.
2010-01-26 07:58:23 +00:00
Mike Snitzer
537f7456e2 Eliminate extra ioctls just to check open_count in _add_new_lv_to_dtree.
DM >= 4.7.0 always returns open_count so just use the associated nodes'
existing info.

Introduce _cached_info() to get an LV's cached info.
2010-01-22 15:40:31 +00:00
Mike Snitzer
5cb0d45d18 Removed inactive_table check from _lv_has_target_type. This check
doesn't offer any benefit (that I can recall) and testing validates
that.
2010-01-22 13:28:54 +00:00
Mike Snitzer
6c1c02dc52 Change dev_manager_mirror_percent()'s 'struct logical_volume *' to be
'const'.  Be consistent with its use (and dev_manager_snapshot_percent()).

Pass 'lv' from dev_manager_snapshot_percent() to _percent() to
_percent_run().  _percent_run() always dereferenced 'lv' (when
initializing segh) even though it may have been NULL (as was the case
until now for dev_manager_snapshot_percent()).

If a "snapshot-origin" LV (snapshot-merge whose merge was deferred
becuase it was open) was passed to _percent_run() it would always return
100%.

Update _percent_run() to NOT return PERCENT_100 et. al. if
->target_percent() wasn't ever called and supplied 'lv' is a merging
origin.  A default return of 100% does not work for snapshot-merge.

Also tweak a related lvconvert log_error() to include "Aborting merge."
2010-01-15 22:58:25 +00:00
Mike Snitzer
e47a591d76 Improve target type compatibility checking in _percent_run().
Add 'target_status_compatible' method to 'struct segtype_handler'.
2010-01-15 16:35:26 +00:00
Alasdair Kergon
8dc351e8d4 Note some problems still to be addressed. 2010-01-14 14:39:57 +00:00
Mike Snitzer
c79b425135 Add snapshot merge wrappers to abstract the associations and flags used
to represent merging origin and snapshot volumes.
2010-01-13 01:55:43 +00:00
Mike Snitzer
c582e3c039 Merge on activate support.
If either the origin or snapshot that is to be merged is open the merge
will not start; only the merge metadata will be written.  The merge will
start on the next activation of the origin (or via lvchange --refresh)
IFF both the origin and snapshot are closed.

Merge on activate is particularly important if we want to merge over a
mounted filesystem that cannot be unmounted (until next boot) --- for
example root.
2010-01-13 01:54:34 +00:00
Mike Snitzer
0b2d216f8e Merging device is loaded with "-cow" suffix and with base name of the
origin.  This is needed so that "-cow" device can be found and removed
when lvremove is performed.
2010-01-13 01:44:37 +00:00
Mike Snitzer
c21b944a35 Conditionally push down either the "snapshot-origin" or
"snapshot-merge" target based on whether the LV is a merging snapshot.

When activating a snapshot-merge target do not attempt to monitor the
LV for events; the polldaemon will monitor the snapshot as it is
merged.

Allow "snapshot-merge" target's usage to be parsed via standard
"snapshot" methods.

NOTE: follow on fixes to the _percent_run change are still needed
2010-01-13 01:43:32 +00:00
Peter Rajnoha
a750353641 Add support to disable udev checking: LVM_UDEV_DISABLE_CHECKING=1 env. var.
LVM_UDEV_DISABLE_CHECKING=1 applies for /dev/<vgname> content only.
We still need to define DM_UDEV_DISABLE_CHECKING=1 for /dev/mapper content.
2010-01-11 15:40:03 +00:00
Peter Rajnoha
cda69e17ef Add activation/udev_rules config option in lvm.conf.
Add dm_tree_add_dev_with_udev_flags to provide wider support for udev flags.
2010-01-07 19:54:21 +00:00
Mike Snitzer
56b3d20462 Add missing 'stack;' for all activate_lv and deactivate_lv callers.
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2010-01-05 21:08:34 +00:00
Petr Rockai
550cae2340 #define an INTERNAL_ERROR macro and use it throughout LVM. 2009-12-16 19:22:11 +00:00
Milan Broz
63ae0d1464 Fix memory lock imbalance in lv_suspend if already suspended.
pvmove suspends all moved LVs + pvmoveX mirrored LV itself.

This suspends even underlying pvmoveX and following explicit
suspend call is just noop.

But in resume the pvmoveX volume is no longer underlying
device for moved LVs, so it performs full resume with memlock
decrease.

Code must call memlock_inc() if suspend is requested, volume
is already suspended and error is not requested.
2009-12-03 19:23:40 +00:00
Zdenek Kabelac
60184834b5 minor indent change 2009-12-03 10:01:30 +00:00
Zdenek Kabelac
6c8ffd0362 skip cast from (void*) 2009-12-03 09:59:54 +00:00
Zdenek Kabelac
08e64ce5e9 minor whitespace indentation 2009-12-03 09:58:30 +00:00
Milan Broz
0548bcc2dc Fix memory leak in lv_info_by_lvid
The lv_from_lvid calls internally vg_read(),
we must release vg structure afterwards.

Code is called only from clvmd.
2009-12-01 19:10:23 +00:00
Milan Broz
6ddadf4023 Fix compilation warning:
activate/dev_manager.c:362: warning: combined_percent_range may be used uninitialized in this function
2009-11-04 14:56:35 +00:00
Alasdair Kergon
75b37a1147 Insert some missing stack macros into activation code. 2009-10-30 13:07:49 +00:00
Peter Rajnoha
421671b1c2 Several changes to udev support code:
- we have these levels when the udev rules are processed:
   10-dm.rules --> [11-dm-<subsystem>.rules] --> [12-dm-permissions.rules] -->
   13-dm-disk.rules --> [...all the other foreign rules...] --> 95-dm-notify.rules

 - each level can be disabled now by
   DM_UDEV_DISABLE_{DM, SUBSYSTEM, DISK, OTHER}_RULES_FLAG

 - add DM_UDEV_DISABLE_DM_RULES_FLAG to disable 10-dm.rules

 - add DM_UDEV_DISABLE_OTHER_RULES_FLAG to disable all the other (non-dm) rules.
   We cutoff these rules by using the 'last_rule', so this one should really be
   used with great care and in well-founded situations. We use this for lvm's
   hidden and layer devices now.

 - add a parameter for add_dev_node, rm_dev_node and rename_dev_node so it's
   possible to switch on/off udev checks

 - use DM_UDEV_DISABLE_DM_RULES_FLAG and DM_UDEV_DISABLE_SUBSYSTEM_RULES_FLAG
   if there's no cookie set and we have resume, remove and rename ioctl.
   This could happen when someone uses the libdevmapper that is compiled with
   udev_sync but the software does not make use of it. This way we can switch
   off the rules and fallback to libdevmapper node creation so there's no
   udev/libdevmapper race.
2009-10-26 14:29:33 +00:00
Alasdair Kergon
984abde146 Permit snapshots of mirrors. (brassow) 2009-10-26 10:01:56 +00:00
Peter Rajnoha
f16aea9ebd Use udev flags support in LVM and provide dm_tree_add_new_dev_with_udev_flags wrapper for dm_tree_add_new_dev. 2009-10-22 13:00:07 +00:00
Petr Rockai
b4048242f5 Handle metadata with unknown segment types more gracefully. 2009-10-16 17:41:49 +00:00
Fabio M. Di Nitto
2cec0e4562 Merge Debian patch 05 debian: keep libdm-abi consistent.
This appears to be the only user visible feature that can change libdm ABI
at build time.

Thanks to Bastian Blank for the patch.
2009-10-12 04:06:42 +00:00
Alasdair Kergon
78ad1549a5 Introduce percent_range_t and centralise snapshot full/mirror in-sync checks. 2009-10-01 00:35:29 +00:00
Alasdair Kergon
64a950108c Don't attempt to deactivate an LV if any of its snapshots are in use. 2009-09-29 18:50:28 +00:00
Milan Broz
89a6cdfd4c Return fail if lv_deactivate did not removed device from kernel.
lv_deactivate now returns always success, because tree deactivation
functions (see dm_tree_deactivate_children) always returns success.

Because code should return failure in lv_deactivate at least,
fix it by checking for device existence after real deactivation call.

(After discussion this was prefered solution to dm tree function rewrite
which affects snapshots and mirrors.)
2009-09-29 15:17:54 +00:00
Peter Rajnoha
96e46b8edb Use the same default umask for /dev dirs (DM_DEV_DIR_UMASK). 2009-09-25 11:58:00 +00:00
Peter Rajnoha
56aba8dc9d Forgotten '%s' in one of _mk_link warning messages. 2009-08-05 09:12:44 +00:00
Alasdair Kergon
a83b7adc28 detect udev mk_link problems 2009-08-04 21:44:20 +00:00
Alasdair Kergon
cf8235e0aa Add activation/udev_sync to lvm.conf. 2009-08-04 15:36:13 +00:00
Alasdair Kergon
2ad32d9518 Add warnings to check udev did what it was meant to. 2009-08-03 18:31:53 +00:00
Alasdair Kergon
aaa01e3488 Only create LV symlinks on ACTIVATE not PRELOAD.
(This is the udev behaviour - but does this change break anything?)
2009-08-03 18:09:25 +00:00
Alasdair Kergon
a74be32bf6 Manage without dm_udev_cleanup? 2009-08-03 18:01:45 +00:00
Alasdair Kergon
f86117e3d5 cleanup some ignored return values & 'stack's 2009-08-03 11:20:15 +00:00
Alasdair Kergon
bd90c6b2c2 Set cookies in activation code and wait for udev to complete processing. 2009-07-31 18:30:31 +00:00
Milan Broz
6391d03f54 Fix backward compatibility for major:minor query.
Is an application uses query and set major:minor
to device, it should not fallback to default major by default.

Add new function whoich allows that (and use it in lvm2).
2009-06-17 20:55:24 +00:00
Milan Broz
c1fdeec999 Fix readahead calculation problems.
During vgreduce is failed mirror image replaced with error segment,
this segmant type has always area_count == 0.
Current code expects that there is at least one area with device,
patch fixes it by additional check (fixes segfault during vgreduce).

Also do not calculate readahead in every lv_info call, we only need
to cache PV readahead before activation calls which locks memory.
2009-06-01 12:43:31 +00:00
Alasdair Kergon
ca51e5d9ec Remove /dev/vgname/lvname symlink automatically if LV is no longer visible. 2009-05-28 01:11:29 +00:00
Alasdair Kergon
25a2e7b80e Pre-release cleanups. 2009-05-21 03:04:52 +00:00
Milan Broz
6ac30c94f2 Fix locking query compatibility with old external locking libraries. 2009-05-20 12:58:03 +00:00
Milan Broz
d396100278 Use readahead of underlying device and not default (smaller) one.
When we are stacking LV over device, which has for some reason
increased read_ahead (e.g. MD RAID), the read_ahead hint
for libdevmapper is wrong (it is zero).

If the calculated read_ahead hint is zero, patch uses read_ahead of underlying device
(if first segment is PV) when setting DM_READ_AHEAD_MINIMUM_FLAG.

Because we are using dev-cache, it also store this value to cache for future use
(if several LVs are over one PV, BLKRAGET is called only once for underlying device.)

This should fix all the reamining problems with readahead mismatch reported
for DM over MD configurations (and similar cases).
2009-05-20 11:09:49 +00:00
Milan Broz
eb91c4eee3 Use suspend with flush when device size was changed during table preload.
This allows online mirror resize, also removes condition to preventing
code to do this.
2009-05-20 09:52:37 +00:00
Milan Broz
fa6dca9f28 Add infrastructure for queriying for remote locks.
Current code, when need to ensure that volume is not
active on remote node, it need to try to exclusive
activate volume.

Patch adds simple clvmd command which queries all nodes
for lock for given resource.

The lock type is returned in reply in text.

(But code currently uses CR and EX modes only.)
2009-05-19 10:38:58 +00:00
Milan Broz
afd9ba98c1 Merge lv_is_displayable and lv_is_visible.
Displayable and visible is the same thing.

volumes_count(vg) is now vg_visible_lvs() and always
returns number of LVs from user perspective.
2009-05-13 21:27:43 +00:00
Milan Broz
59d8429cb3 Introduce lv_set_visible & lv_set_invisible and use lv_is_visible always.
The vg->lv_count parameter now includes always number of visible
logical volumes.

Note that virtual snapshot volume (snapshotX) is never visible,
but it is stored in metadata with visible flag.
2009-05-13 21:26:45 +00:00
Zdenek Kabelac
cfebc626b6 Do not query nonexistent devices for readahead. 2009-05-13 14:13:54 +00:00
Milan Broz
610646095b Use zalloc in initialization of device manager (to zero pvmove mirror count). 2009-05-07 12:01:21 +00:00
Milan Broz
095bbca691 Properly release VG memory pool in activation code and clvmd. 2009-04-10 10:00:04 +00:00
Alasdair Kergon
81680dce3c Fix last check-ins: seg can be NULL. 2009-02-28 20:04:24 +00:00
Alasdair Kergon
ed82bfd2ba Attempt cleanup in child before execing new binary in exec_cmd() 2009-02-28 00:54:06 +00:00
Zdenek Kabelac
c8669f6b13 Fixed bug where lvresize option -t was not properly passed to fsadm.
Using argv[] list in exec_cmd() to allow more params for external commands.
Fsadm does not allow checking mounted filesystem.
Fsadm no longer accepts 'any other key' as 'no' answer to y/n.
Fsadm improved handling of command line options.
2009-02-24 15:48:00 +00:00
Alasdair Kergon
0f817d38f7 If kernel supports only one dm major number, use in place of any supplied.
No longer require kernel and metadata major numbers to match.
2009-02-12 20:42:07 +00:00
Milan Broz
0c8bdaf33c Fail add tree node when requested major/minor is used.
Check for major/minor collision is added in _add_dev_to_dtree()
where we already read info by uuid,
so in the case of requesting major/minor it queries device-mapper
by major/minor for device availability.

Fixes https://bugzilla.redhat.com/show_bug.cgi?id=204992
2008-12-19 15:23:03 +00:00
Peter Rajnoha
3ad47d16ab Fix vgrename using UUID in case there are VGs with the same name. 2008-12-19 14:22:48 +00:00
Peter Rajnoha
b47952641a Added displayable_lvs_in_vg and lv_is_displayable functions to deal with
the counts of visible LVs from user's perspective consistently throughout
the code.
2008-12-04 15:54:26 +00:00
Alasdair Kergon
2c44337bd5 Right, a simple build (without options) is working again. 2008-11-03 22:14:30 +00:00
Alasdair Kergon
87ec948433 . 2008-09-19 07:18:03 +00:00
Alasdair Kergon
cda354087f rename var 2008-09-19 07:12:45 +00:00
Alasdair Kergon
8c5bcdabab Improve the way VGs with PVs missing are handled so manual intervention
is required in fewer circumstances.  (mornfall)
2008-09-19 06:42:00 +00:00
Alasdair Kergon
82185ada82 Cease recognising snapshot-in-use percentages returned by early development kernels. 2008-07-15 00:25:52 +00:00
Zdenek Kabelac
5f2c195933 Improve/Fix read ahead 'auto' calculation for stripe_size
Fix lvchange output for -r auto setting if auto is already set
Add testcase for read ahead
2008-06-18 11:32:14 +00:00
Alasdair Kergon
424dd43e6f Revert assuming precommitted metadata is live when activating (unnecessary). 2008-06-08 11:33:15 +00:00
Alasdair Kergon
e4b34bfad0 When activating, if precommitted metadata is still cached, assume it's live. 2008-06-05 13:06:39 +00:00
Alasdair Kergon
4bfa132445 When removing LV symlinks, skip any where the VG name is not determined. 2008-06-05 12:45:55 +00:00
Dave Wysochanski
5ca6698f12 Add lv_is_active() to determine whether an lv is active.
Handles non-clustered as well as clustered.  For clustered,
the best we can do is try exclusive local activation.  If this
succeeds, we know it is not active elsewhere in the cluster.
Otherwise, we assume it is active elsewhere.
2008-04-10 21:34:18 +00:00
Dave Wysochanski
985ca02b6a Add vg_is_clustered() helper function.
Should be no functional change.
2008-04-10 17:09:32 +00:00
Milan Broz
5619c629f6 Add detection of clustered mirror log capability.
Currently only check for kernel module presence.
2008-04-07 10:23:47 +00:00
Alasdair Kergon
4e9083db10 Fix mirror log name construction during lvconvert. (2.02.30)
Make monitor_dev_for_events recurse through the stack of LVs.
Clean up some more compiler warnings.
Add mirror names test script.
2008-01-31 12:19:36 +00:00
Alasdair Kergon
67cdbd7e4d Some whitespace tidy-ups. 2008-01-30 14:00:02 +00:00
Alasdair Kergon
c51b9fff19 Use stack return macros throughout. 2008-01-30 13:19:47 +00:00
Alasdair Kergon
0c06de632a pre-release review cleanups 2008-01-17 17:17:09 +00:00
Alasdair Kergon
876003dc44 allow a mirror to contain only one mimage 2008-01-16 19:18:51 +00:00
Petr Rockai
67961c7c10 Add snapshot dmeventd library (enables dmeventd snapshot monitoring). 2008-01-09 15:32:19 +00:00