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.
Peter Rajnoha [Tue, 1 Mar 2016 14:23:43 +0000 (15:23 +0100)]
report: add lv_historical field to identify historical LVs
The lv_historical reporting field is a simple binary field that reports
whether an LV is historical one ("historical" value or value of "1" displayed)
or not (blank string "" or value of "0" displayed).
Peter Rajnoha [Tue, 1 Mar 2016 14:23:05 +0000 (15:23 +0100)]
toollib: honour '-H|--history' switch while executing process_each_lv_in_vg
When processing LVs in a VG and when the -H|--history switch is used,
make process_each_lv_in_vg to iterate over historical volumes too.
For each historical LV, we use dummy struct logical_volume instance with
the "this_glv" reference set to a wrapper over proper struct
historical_logical_volume representation. This makes it possible to process
historical LVs just like normal live LVs (though a dummy one without any
segments and all the other fields zeroed and blank) and it also allows
for using all historical LV related information via lv->this_glv->historical
reference.
One can use a simple call to lv_is_historical to make a difference between
live and historical LV in all the code that is called by process_each_* fns.
Peter Rajnoha [Tue, 1 Mar 2016 14:22:48 +0000 (15:22 +0100)]
cmd: add '-H|--history' switch and wire it up in cmd_context and processing_handle
This patch adds "include_historical_lvs" field to struct cmd_context to
make it possible for the command to switch between original funcionality
where no historical LVs are processed and functionality where historical
LVs are taken into account (and reported or processed further). The switch
between these modes is done using the '-H|--history' switch on command
line.
The include_historical_lvs state is then passed to process_each_* fns
using the "include_historical_lvs" field within struct processing_handle.
Peter Rajnoha [Tue, 1 Mar 2016 14:21:36 +0000 (15:21 +0100)]
metadata: add support for interconnection of thin pool LV segment with indirect origin
Add support for making an interconnection between thin LV segment and
its indirect origin (which may be historical or live LV) - add a new
"indirect_origin" argument to attach_pool_lv function.
Peter Rajnoha [Tue, 1 Mar 2016 14:20:49 +0000 (15:20 +0100)]
metadata: format_text: also export historical LVs
Also export historical LVs when exporting LVM2 metadata.
This is list of all historical LVs listed in
"historical_logical_volumes" metadata section with all
the properties exported for each historical LV.
For example, we have this thin snapshot sequence:
lvol1 --> lvol2 --> lvol3
\
--> lvol4
We end up with these metadata:
logical_volume {
...
(lvol1, lvol3 and lvol4 listed here as usual - no change here)
...
}
Peter Rajnoha [Tue, 1 Mar 2016 14:19:57 +0000 (15:19 +0100)]
metadata: add add_glv_to_indirect_glvs and remove_glv_from_indirect_glvs
The add_glv_to_indirect_glvs is a helper function that registers a
volume represented by struct generic_logical_volume instance ("glv")
as an indirect user of another volume ("origin_glv") and vice versa -
it also registers the other volume ("origin_glv") as indirect_origin
of user volume ("glv").
The remove_glv_from_indirect_glvs does the opposite.
Peter Rajnoha [Tue, 1 Mar 2016 14:19:23 +0000 (15:19 +0100)]
metadata: add get_or_create_glv and get_or_create_glvl
The get_or_create_glv is helper function that retrieves any existing
generic_logical_volume wrapper for the LV. If the wrapper does not exist
yet, it's created.
The get_org_create_glvl is the same as get_or_create_glv but it creates
the glv_list wrapper in addition so it can be added to a list.
Peter Rajnoha [Tue, 1 Mar 2016 14:18:42 +0000 (15:18 +0100)]
metadata: add infrastructure to track LV history
Add new structures and new fields in existing structures to support
tracking history of LVs (the LVs which don't exist - the have been
removed already):
- new "struct historical_logical_volume"
This structure keeps information specific to historical LVs
(historical LV is very reduced form of struct logical_volume +
it contains a few specific fields to track historical LV
properties like removal time and connections among other LVs).
- new "struct generic_logical_volume"
Wrapper for "struct historical_logical_volume" and
"struct logical_volume" to make it possible to handle volumes
in uniform way, no matter if it's live or historical one.
- new "struct glv_list"
Wrapper for "struct generic_logical_volume" so it can be
added to a list.
- new "indirect_glvs" field in "struct logical_volume"
List that stores references to all indirect users of this LV - this
interconnects live LV with historical descendant LVs or even live
descendant LVs.
- new "indirect_origin" field in "struct lv_segment"
Reference to indirect origin of this segment - this interconnects
live LV (segment) with historical ancestor.
- new "this_glv" field in "struct logical_volume"
This references an existing generic_logical_volume wrapper for this
LV, if used. It can be NULL if not needed - which means we're not
handling historical LVs at all.
- new "historical_lvs" field in "struct volume group
List of all historical LVs read from VG metadata.
Zdenek Kabelac [Wed, 2 Mar 2016 10:12:46 +0000 (11:12 +0100)]
cache: add kernel_cache_policy option
Pair kernel_cache_settings with kernel_cache_policy.
There is very small chance in error case that the value in table
might be differnet from the value stored in metadata
so make it 'checkable'.
Showing 'u' in the pv_attr reporting field is mostly unnecessary because
most PVs are allocatable, and being allocatable implies it is (u)sed,
and this is already obvious from other fields in the default 'pvs'
output like the VG name.
So move the new (u)sed pv_attr from character position 4 to 1, and only
show it in those rare cases when the PV is not (a)llocatable or the
relevant metadata is missing.
(Scripts should not be using pv_attr, but rather pv_allocatable,
pv_exported, pv_missing, pv_in_use etc.)
Zdenek Kabelac [Fri, 26 Feb 2016 09:15:24 +0000 (10:15 +0100)]
coverity: helping coverity with NULL pointer
Helping with understanding we will not try to deref NULL pointer,
as if the sizes are initialized to NULL it also means 'mem' would
be NULL, but thats too hard to model so make it obvious.
Tony Asleson [Thu, 25 Feb 2016 22:12:53 +0000 (16:12 -0600)]
lvmdbusd testing: Add validatestate.py utility
This simple tool calls the Manager.Refresh method on the dbus service
to check and see if the dbus service has the most up to date state.
This is to be used for testing to ensure that event driven updates are
working as planned.
Tony Asleson [Thu, 25 Feb 2016 20:57:12 +0000 (14:57 -0600)]
lvmdbusd: Reduce unnecessary state refreshes
When we use udev or have lvm call back into the dbus service when a
change occurs, even if that change originated from the dbus service
we end up refreshing the state of the system twice which is not
needed or wanted. This change handles this case by removing any
pending refreshes in the worker queue if the state of the system
was just updated.