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There is a window of time where the following can occur.
1. An API request is in process to the lvm shell, we have written some
command to the lvm shell and we are blocked on that thread waiting
2. A signal arrives to the daemon which causes us to exit. The signal
handling code path goes directly to the lvm shell and writes
"exit\n". This causes the lvm shell to simply exit.
3. The thread that was waiting for a response gets an EIO as the child
process has exited. This bubbles up a failure.
This is addressed by placing a lock in the lvm shell to prevent
concurrent access to the shell. We also gather additional debug data
when we get an error in the lvm shell read path. This should help if
the lvm shell exits/crashes on its own.
Replace spaces with \040 in directory paths from getmntent (mtab).
The recent commit 5374a44c57 compares mount point directory paths
from /etc/mtab and /proc/mounts, in order to detect when a mounted
LV has been renamed. The directory path comparison does not work
correctly when the path contains spaces because getmntent uses
ascii space chars and proc replaces spaces with \040.
Add some Gentoo based patches for better support of static linking.
This are not tested nor supported by upstream developers.
Usage requires presence of several libraries in their static form
which is however not commonly available.
Selinux modified by zkabelac to still work on older sofrware which
did not provided libselinux.pc at a time - see keep the old check
present and use pkg-config only when possible.
When user enables lockd libraris, code needs to fail, when then are
missing. Also when notify-dbus support if enabled, and libsystemd is
missing, abort configuration.
Check for pkg-config --libs libdlm_lt and test if the returned value
contains word 'pthread' - if so, it's likely a buggy result from
incorrect config file and use directly -ldlm_lt for this case.
There may be some unconventional methods of sharing disks with vgimport
where hints could cause confusion. Hints should be disabled when
sharing disks, or pvscan --cache used to regenerate hints as needed,
but invalidating hints from vgimport might help reduce confusion.
Convert lvmlockd to use configure _LIBS and _CFLAGS for
discovered libraries.
TODO: ATM we ignore discovered libdlm and use libdlm_lt instead.
Also libseagate_ilm is hard to find unicorn for testing.
Convert naming SYSTEMD_CFLAGS/LIB -> LIBSYSTEMD_CFLAGS/LIBS
to better fit library check for libsystemd.
Build lvmlockd with SD_NOTIFY when we have defined LIBSYSTEMD_LIBS.
Coverity is complaining about unchecked strcpy here, which is
irelevant as we preallocate buffer to fit in copied string,
however we could actually reuse these size and use just memcpy().
So lets make some simple conversions.
This was trying to warn about a misconfig where the root PV
was excluded by the devices file, but it wasn't covering all
cases. Also, it's not very useful because the root LV is
usually activated directly in the initrd.
With the recent use of DEVLINKS, there is no longer any real
point in checking the filter for symlink names. Removing
this check should not change behavior with or without symlinks
in the filter.
Commit 7a8b7b4add introducing lockidm
support missed to use AC_SUBST() for a variable and provide it only
in prebuilt configure, so with the next autoreconf this variable
was lost and IDM support was no longer compiled.
Fixes: https://github.com/lvmteam/lvm2/issues/98
Reported-by: Tom Prohofsky
Correct setting of migration_threshold and add clarify
how the user can restore default cache settings for cache policies.
Also document mq aliasing with smq for newer kernels.
