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Use #define instead, since we do not require actually buffer needs
to exists to eliminated new gcc6 warning:
clvm.h:53:19: warning: ‘CLVMD_SOCKNAME’ defined but not used
[-Wunused-const-variable]
export LVMDBUSD_SESSION=True to run on the session bus instead
of the system bus so that we can run the unit test without
installing the dbus conf file.
Signed-off-by: Tony Asleson <tasleson@redhat.com>
It appears that the output of lvconvert --merge can vary some. The code
was blowing up as it was trying to parse a line of stdout to retrieve the
% complete, but the line did not have the needed format and an execption
was thrown. The uncaught exception caused the background thread to exit
without updating the job object, which caused the client to hang forever
waiting. Added a default exception handler to prevent unhandled execptions
causing hangs and removed the parameter skip_first_line as it's no longer
needed. The code checks to see if the line can be parsed before doing so.
Signed-off-by: Tony Asleson <tasleson@redhat.com>
After the lockspace has been successfully removed,
invalidate the name field in the lockspace struct.
The struct remains on the list of lockspaces until
the struct can be freed later. Until the struct is
freed, its name will prevent another new lockspace
from being created with the same name.
Since commit 2fc126b00d, the library
code requires udev to be initialised for device scanning and
clvmd can fail to find VGs if devices/external_device_info_source
is set to "udev".
Make the lvb validation rules for convert match
those for unlock (even though it would be very
unlikely or impossible for convert to deal with
zero lvb.)
Have commands send lvmlockd the update message
in vg_write instead of vg_commit, so that it's
not done while LVs are suspended. If the vg_write
is not committed, and the seqno sent to lvmlockd
is not used, then lvmlockd can detect this when
the next update uses the same seqno.
Use process_each_vg() to lock and read the old VG,
and then call the main vgrename code.
When real VG names are used (not a UUID in place of the
old name), the command still pre-locks the new name
(when strcmp wants it locked first), before calling
process_each_vg on the old name.
In the case where the old name is replaced with a UUID,
process_each_vg now translates that UUID into the real
VG name, which it locks and reads. In this case, we
cannot do pre-locking to maintain lock ordering because
the old name is unknown. So, in this case the strcmp
based lock ordering is suppressed and the old name is
always locked first. This opens a remote chance for
lock ordering conflict between racing vgrenames between
two names where one or both commands use the UUID.
If an existing fifo has the wrong attributes it cannot be trusted
so we must unlink it and recreate it correctly.
(Replaces 2c8d6f5c90: if the other end of
the fifo already got opened while its mode was insecure, delaying the
chmod isn't going to make any difference!)
Reinstate and extend checks removed by e1b111b02a.
The code has always assumed that only root has access to the directory
containing the fifos and that they are under the complete control of
dmeventd code. If anything is found not to be as expected, then open()
should certainly not be attempted!
In lookup, return a count of entries with the
same key rather than the value from a second
entry with the same key.
Using some slightly different names.
Simply use lookup_withval right away rather than doing a
standard lookup, checking for the wrong mapping, then
repeating with lookup_withval to get the right mapping.
If the data len is passed into the hash table
and saved there, then the hash table internals
do not need to assume that the data value is
a string at any point.
New hash table functions are added that allow for
multiple entries with the same key. Use of the
vgname_to_vgid hash table is converted to these
new functions since there are multiple entries
in vgname_to_vgid that have the same key (vgname).
When multiple VGs with the same name exist, commands
that reference only a VG name will fail saying the
VG could not be found (that error message could be
improved.) Any command that works with the select
option can access one of the VGs with -S vg_uuid=X.
vgrename is a special case that allows the first VG
name arg to be replaced by a uuid, which also works.
(The existing hash table implementation is not well
suited for handling this case, but it works ok with
the new extensions. Changing lvmetad to use its own
custom hash tables may be preferable at some point.)
Recent change 2c8d6f5c90
actually droped restart when the reason of failing open is missing
device completely - check for ENOENT now as another reason
to start new dmeventd server (when there is no systemd to maintain it).
