Peter Rajnoha [Tue, 22 Mar 2016 09:28:01 +0000 (10:28 +0100)]
dev: also count with suffixes in UUID for LVs when constructing VGID and LVID index
UUID for LV is either "LVM-<vg_uuid><lv_uuid>" or "LVM-<vg_uuid><lv_uuid>-<suffix>".
The code before just checked the length of the UUID based on the first
template, not the variant with suffix - so LVs with this suffix were not
processed properly.
For example a thin pool LV (as an example of an LV that contains
sub LVs where UUIDs have suffixes):
Tony Asleson [Mon, 21 Mar 2016 22:22:56 +0000 (17:22 -0500)]
lvmdbusd: Add lvm flight recorder
To help out with debug, when an exception is thrown in the dbus service we
will dump all the information we have on the last 16 commands that were
executed along with the stack strace.
Peter Rajnoha [Mon, 21 Mar 2016 14:48:36 +0000 (15:48 +0100)]
dev: be safer when reading sysfs properties
Check if the value we read from sysfs is not blank and replace the '\n'
at the end only when needed ('\n' should usually be there for sysfs values,
but better check this).
Peter Rajnoha [Wed, 16 Mar 2016 13:01:26 +0000 (14:01 +0100)]
dev: detect mismatch between devices used and devices assumed for an LV
It's possible for an LVM LV to use a device during activation which
then differs from device which LVM assumes based on metadata later on.
For example, such device mismatch can occur if LVM doesn't have
complete view of devices during activation or if filters are
misbehaving or they're incorrectly set during activation.
This patch adds code that can detect this mismatch by creating
VG UUID and LV UUID index while scanning devices for device cache.
The VG UUID index maps VG UUID to a device list. Each device in the
list has a device layered above as a holder which is an LVM LV device
and for which we know the VG UUID (and similarly for LV UUID index).
We can acquire VG and LV UUID by reading /sys/block/<dm_dev_name>/dm/uuid.
So these indices represent the actual state of PV device use in
the system by LVs and then we compare that to what LVM assumes
based on metadata.
In this case the vg-lvol0 is mapped onto sdq and sds becauset this is
what was available and seen during activation. Then later on, sdr and
sdt appeared and mpath devices were created out of sdq+sdr (mpath_dev1)
and sds+sdt (mpath_dev2). Now, LVM assumes (correctly) that mpath_dev1
and mpath_dev2 are the PVs that should be used, not the mpath
components (sdq/sdr, sds/sdt).
[0] fedora/~ # pvs
Found duplicate PV xSUix1GJ2SK82ACFuKzFLAQi8xMfFxnO: using /dev/mapper/mpath_dev1 not /dev/sdq
Using duplicate PV /dev/mapper/mpath_dev1 from subsystem DM, replacing /dev/sdq
Found duplicate PV MvHyMVabtSqr33AbkUrobq1LjP8oiTRm: using /dev/mapper/mpath_dev2 not /dev/sds
Using duplicate PV /dev/mapper/mpath_dev2 from subsystem DM, ignoring /dev/sds
WARNING: Device mismatch detected for vg/lvol0 which is accessing /dev/sdq, /dev/sds instead of /dev/mapper/mpath_dev1, /dev/mapper/mpath_dev2.
PV VG Fmt Attr PSize PFree
/dev/mapper/mpath_dev1 vg lvm2 a-- 100.00m 0
/dev/mapper/mpath_dev2 vg lvm2 a-- 100.00m 0
Peter Rajnoha [Fri, 18 Mar 2016 14:55:36 +0000 (15:55 +0100)]
fsadm: use stat to get major:minor pair for non-standard /dev layouts
If we're using non-standard /dev layout so we can't get the dm-X name
easily, we can't also look at the /sys/blocl/dm-X/dev to get the major:minor
pair. Use "stat" in this case even though it triggers automounts
(but there's no better way for now).
David Teigland [Thu, 10 Mar 2016 19:28:47 +0000 (13:28 -0600)]
pvchange, pvresize: move exported VG check
Allow pvchange and pvresize to process exported VGs,
and have them check for the exported state in their
single function.
Previously, the exported VG state would trigger a
failure in vg_read()/ignore_vg() because the VGs are
being read with READ_FOR_UPDATE. Because these commands
read all VGs to search for the intended PVs, any
exported VG would trigger a failure, even if it was
not related to the intended PV.
Zdenek Kabelac [Thu, 3 Mar 2016 19:27:09 +0000 (20:27 +0100)]
man: updates
Continuing with lvconvert style updates.
Minimize usage of '\:' as zero-width break space, since html renderers
do not handle this groff sign well (some of them seems to even render
':' there).
But since we do not want see badly rendered man pages itself, prefer
the 'man visual' appearence over html page generation (man2html should
be actually fixed).
Start to use 'user input option' with Capitals more consistently.
Peter Rajnoha [Thu, 10 Mar 2016 12:02:38 +0000 (13:02 +0100)]
metadata: do not issue warning message about PV dev size being 0 when the device has gone just after VG read
There's a window between doing VG read and checking PV device size
against real device size. If the device is removed in this window,
the dev cache still holds struct device and pv->dev still references
that and that PV is not marked as missing. However, if we're trying
to get size for such device, the open fails because that device
doesn't exists anymore.
We called existing pv_dev_size in _check_pv_dev_sizes fn. But
pv_dev_size assigned a size of 0 if the dev_get_size it called failed
(because the device is gone).
So call the dev_get_size directly and check for the return code
in _check_pv_dev_sizes and go further only if we really know the
device size. This is to avoid confusing warning messages like:
Device /dev/sdd1 has size of 0 sectors which is smaller than corresponding PV size of 31455207 sectors. Was device resized?
One or more devices used as PVs in VG helter_skelter have changed sizes.
Tony Asleson [Tue, 8 Mar 2016 21:57:15 +0000 (15:57 -0600)]
lvmdbus: Fix exception during exception handling
Python 3.5 in F24 was throwing the following exception:
Traceback (most recent call last):
File "/usr/lib/python3.5/site-packages/lvmdbusd/main.py", line 73, in process_request
req.run_cmd()
File "/usr/lib/python3.5/site-packages/lvmdbusd/request.py", line 73, in run_cmd
self.register_error(-1, st)
File "/usr/lib/python3.5/site-packages/lvmdbusd/request.py", line 123, in register_error
self._reg_ending(None, error_rc, error)
File "/usr/lib/python3.5/site-packages/lvmdbusd/request.py", line 115, in _reg_ending
self.cb_error(self._rc_error)
File "/usr/lib64/python3.5/site-packages/dbus/service.py", line 669, in <lambda>
keywords[error_callback] = lambda exception: _method_reply_error(connection, message, exception)
File "/usr/lib64/python3.5/site-packages/dbus/service.py", line 293, in _method_reply_error
exception))
File "/usr/lib64/python3.5/traceback.py", line 136, in format_exception_only
return list(TracebackException(etype, value, None).format_exception_only())
File "/usr/lib64/python3.5/traceback.py", line 442, in __init__
if (exc_value and exc_value.__cause__ is not None
AttributeError: 'str' object has no attribute '__cause__'
This was caused because we were calling the dbus error callback with a
string instead of an actual exception. On python 3.4 this was apparently
OK, but not with 3.5. Corrected to pass the exception to error callback.
Change tested on both python 3.4 and 3.5.
Reported-by: Vratislav Podzimek <vpodzime@redhat.com> Signed-off-by: Tony Asleson <tasleson@redhat.com>
report: Tidy some field names, widths and headings.
Specifying an output width of 0 now leads to a default minimum width
taken from the width of the column heading. (Most fields should use
this.)
Components of field names are generally separated by underscores (which
are optional at run-time). (Dropped 3 duplicate fields now covered by
this rule.)
Each field heading must be unique and generally doesn't have spaces
between words (which get capitalised) unless they are already short and
the fields are normally longer or clarity demands it.
David Teigland [Mon, 7 Mar 2016 20:15:33 +0000 (14:15 -0600)]
toollib: always process in use pvs
With the recent conversion of pvcreate/pvremove to the
common toollib processing function, skipping in-use PVs
in _process_pvs_in_vg prevented them from being protected
as intended by the in-use flag.
The processing code for pvcreate/pvremove checks for the
in-use state itself and prevents using an in-use PV.
If a PV is skipped, it looks like an unused device and
is not protected from being used in pvcreate/pvremove.
David Teigland [Mon, 7 Mar 2016 16:50:45 +0000 (10:50 -0600)]
vgscan: add --notifydbus to send a notification
This command option can be used to trigger a D-Bus
notification independent of the usual notifications
that are sent from other commands as an effect of
changes to PV/VG/LV state. If lvm is not built with
dbus notification support or if notify_dbus is disabled
in the config, this command will exit with an error.
David Teigland [Mon, 22 Feb 2016 15:42:03 +0000 (09:42 -0600)]
dbus: add notification from commands
When a command modifies a PV or VG, or changes the
activation state of an LV, it will send a dbus
notification when the command is finished. This
can be enabled/disabled with a config setting.
Peter Rajnoha [Mon, 7 Mar 2016 09:32:41 +0000 (10:32 +0100)]
coverity: fix possible resource leak in _print_historical_lv function
The code in _print_historical_lv function works with temporary
"descendants_buffer" that is allocated and freed within this
function.
When printing text out, we used "outf" macro which called
"out_text" fn and it checked return value and if failed,
the macro called "return_0" automatically. But since we
use the temporary buffer, if any of the out_text calls
fails, we need to deallocate this buffer properly - that's
the "goto_out", otherwise we'll be leaking memory.
So add new "outfgo" helper macro which does the same as "outf",
but it calls "goto_out" instead of "return_0" so we can jump
to a cleanup hook at the end.
Marian Csontos [Tue, 23 Feb 2016 08:13:01 +0000 (09:13 +0100)]
dbustest.sh: Get dbus test to work on buildbot
- stdout/stderr for test output
- debug.log* for daemon output
- use install instead of cp for DBus config
- use system bus
- DBus reloads on new file. Better having it created with correct
permissions.
Notes:
- Squashed commits from mcsontos development branch
- Still disabled at this time
David Teigland [Wed, 2 Mar 2016 22:49:32 +0000 (16:49 -0600)]
tests: direct control of lvm1 usage in tests
Using lvm1 metadata with lvmetad is not generally allowed,
but nothing has prevented creating new lvm1 metadata with
lvmetad (missing error checking in pvcreate/vgcreate.)
Various tests are using lvm1 with lvmetad and happen to
work because of the missing error checks.
This commit fixes the tests so they won't fail when the
lvm1/lvmetad error checking is fixed. A new variable
LVM_TEST_LVM1 is defined and is used in the scripts to
decide if lvm1 metadata should be tested. LVM_TEST_LVM1
is not defined when lvmetad is being tested, and the
combination of LVM_TEST_LVM1 and LVM_TEST_LVMETAD can
be used to verify the desired lvmetad+lvm1 behavior.
Historical LV is valid as long as there is at least one live LV among
its ancestors. If we find any invalid (dangling) historical LVs, remove
them automatically.
Peter Rajnoha [Tue, 1 Mar 2016 14:24:40 +0000 (15:24 +0100)]
report: add full_ancestors field to display ancestors with history
The lv_full_ancestors reporting field is just like the existing
lv_ancestors field but it also takes into account any history and
indirect relations recorded.
Peter Rajnoha [Tue, 1 Mar 2016 14:24:07 +0000 (15:24 +0100)]
report: report historical LV names with '-' prefix
All names for historical LVs are prefixed with '-' character to make clear
difference between live and historical LVs. The '-' can't be set by users
for live LV names during lvcreate hence we never get into a conflict with
the names that user defines for live LVs.