1
0
mirror of git://sourceware.org/git/lvm2.git synced 2024-12-22 17:35:59 +03:00
Commit Graph

407 Commits

Author SHA1 Message Date
Jonathan Earl Brassow
9e277b9e2c Fix issue preventing cluster mirror creation.
Mirrors used to be created by first creating a linear device and then adding
the other images plus the log.  Now mirrors are created by creating all the
images in one go and then adding the log separately.  The new way ran into
the condition that cluster mirrors cannot change the log type (in the case
of creation, from core -> disk) while the mirror is not active.  (It isn't
active because it is in the process of being created.)  The reason this
condition is in place is because a remote node may have the mirror active, and
we don't want to alter the log underneath it.

What we really needed was a way of checking if the mirror was active remotely
but not locally, and in that case do not allow a change of the log.  I've added
this check, and cluster mirrors can now be created again.
2011-06-22 21:31:21 +00:00
Peter Rajnoha
418663b61c Disable udev fallback by default and add activation/udev_fallback to lvm.conf.
We've used udev fallback code till now to check whether udev
created/removed the entries in /dev correctly and if not,
a repair was done (giving a warning messagea about that).

This patch adds a possibility to enable this additional check
and subsequent fallback only when required (debugging purposes
mostly) and trust udev completely.

So let's disable the fallback code by default and add a new
configuration option "activation/udev_fallback".

(The original code for creating the nodes will still be used
in case the device directory that is set in lvm.conf differs
from the one that udev uses and also when activation/udev_rules
is set to 0 - otherwise we would end up with no nodes/symlinks
at all)
2011-06-17 14:50:53 +00:00
Zdenek Kabelac
93a98c2672 Remove unused internal flag ACTIVATE_EXCL from the code 2011-06-17 14:30:58 +00:00
Zdenek Kabelac
f3d8974dc9 Add couple FIXMEs around suspicious code 2011-06-17 14:24:18 +00:00
Zdenek Kabelac
c6168a14c9 Use lv_activate_opts struct instead of ACTIVATE_EXCL status flag
Let's hope all conditions has been properly converted.
2011-06-17 14:22:48 +00:00
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