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Some tools are typically installed into /usr/sbin (or /sbin) dir.
And some systems do not add this path to user's $PATH var.
Ensure sbin paths are looked through...
lvmdbusd executable script must use python3 interpreter detected by
configure script, as site-packages directory used for library is only
used by that interpreter.
Introduce few more AC_SUBST vars for usage in *.in generation.
In some case we want to replace i.e. $sbindir with full path
instead of current ${exec_prefix}/sbin.
This patch provides:
USRSBINDIR
SBINDIR
DEFAULT_SYS_LOCK_DIR
SYSCONFDIR
At the same time properly use sbindir & usrsbindir with
lvm, fsadm, clvmd from one primary definition.
Drop 'DMEVENT' make variable and use BUILD_DMEVENTD like with other daemons.
NOTE: by default we do not build dmeventd - maybe time to change
as lot of build targets basically do need dmeventd...
Switch to use SYSTEMD_LIBS and avoid linking systemd library with
every linked tool when dbus notification are enabled.
(TODO add missing testing for lib presence)
Check first if we need to even link -lrt - since clock functions
are normally emebeded with recent glibc (>=2.17)
Use standard RT_LIBS name.
Avoid duplicate test for realtime clock with lvmlockd
Show better error message when realtime clock support is missing or
disabled.
Link RT_LIBS explicitely with lvmlockd and lvmetad.
For proper usage of Cache kernel metadata format V2,
new cache_check tool is basically mandatory.
Print warning during configure time about this problem.
Avoid reporting 'checking result' as maybe - it should
clearly tell 'yes' or 'no'.
Just shuffle printed message to the place, where we
already know the 'maybe' answer.
So instead of printing 'unclear':
checking whether to enable libblkid detection of signatures when wiping... maybe
checking for BLKID... yes
checking whether to use udev-systemd protocol for jobs in background... maybe
checking for SYSTEMD... yes
show this:
checking for BLKID... yes
checking whether to enable libblkid detection of signatures when wiping... yes
checking for SYSTEMD... yes
checking whether to use udev-systemd protocol for jobs in background... yes
Add a daemon that can be launched to monitor a group of regions
corresponding to the extents of a file, and to update the regions as the
file's allocation changes.
The daemon is intended to be started from a library interface, but can
also be run from the command line:
dmfilemapd <fd> <group_id> <path> <mode> [<foreground>[<log_level>]]
Where fd is a file descriptor open on the mapped file, group_id is the
group identifier of the mapped group and mode is either "inode" or
"path". E.g.:
# dmfilemapd 3 0 vm.img inode 1 3 3<vm.img
...
If foreground is non-zero, the daemon will not fork to run in the
background. If verbose is non-zero, libdm and daemon log messages will
be printed.
It is possible for the group identifier to change when regions are
re-mapped: this occurs when the group leader is deleted (regroup=1 in
dm_stats_update_regions_from_fd()), and another region is created before
the daemon has a chance to recreate the leader region.
The operation is inherently racey since there is currently no way to
atomically move or resize a dm_stats region while retaining its
region_id.
Detect this condition and update the group_id value stored in the
filemap monitor.
A function is also provided in the the stats API to launch the filemap
monitoring daemon:
int dm_stats_start_filemapd(int fd, uint64_t group_id, const char *path,
dm_filemapd_mode_t mode, unsigned foreground,
unsigned verbose);
This carries out the first fork and execs dmfilemapd with the arguments
specified.
A dm_filemapd_mode_t value is specified by the mode argument: either
DM_FILEMAPD_FOLLOW_INODE, or DM_FILEMAPD_FOLLOW_PATH. A helper function,
dm_filemapd_mode_from_string(), is provided to parse a string containing
a valid mode name into the appropriate dm_filemapd_mode_t value.
When user requested on cmdline disabling of lvmetad/lvmpoll,
respect it and when lvmlockd requires these daemon,
Error configure with clear message about misconfiguration.
If not using explicit --enable-blkid-wiping/--disable-blkid-wiping
configure option, the configure script tries to enable/disable blkid
wiping feature automatically based on blkid library version found.
The script incorrectly set default value for lvm.conf's
allocation/use_blkid_wiping" setting to "1" (enabled) if proper
blkid library version was not found or the version found was less
than the minimum required. It should be set to "0" in this case.
The udev_device_get_is_initialized is available since libudev version
165. Older versions are still used somewhere (e.g. RHEL6). So better
check for this fn and use it only if it's available.
Commit 9403edbb93 move location of
configure.h and lvm-version.h.
Let's try even better place then /conf dir which should be left
for user configurable files.
Put these files right into include dir.
librt doesn't have a pkgconfig file so use Libs.private: -lrt instead
to declare the dependency directly.
The same applies for -lm which is also used and which hasn't been
defined in the devmapper.pc file yet.
We already use -lm functions in a couple of places (these are
satisfied by gcc built-ins for most builds): add a configure.in
check and explicitly link to -lm.
If the Linux timerfd interface to POSIX timers is available at compile
time use it for all report interval timekeeping. This gives more
accurate interval timing when the per-interval processing time is less
than the configured interval and simplifies the timestamp bookkeeping
required to keep accurate time.
For systems without timerfd support fall back to the simple usleep based
timer.
