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Switch to use libdm dm_get_status_snapshot() function for
reading status info.
This fixes bug, where the code was using 32bit integers,
while the snapshot target is able to return 64bit sizes.
However this also means, someone is using >1TB snapshot
cow devices, which is actually very bad idea anyway, since the
perfomance and memory usage in this case is very bad.
Patch fixes hidden problem with lvm metadata caching.
When the pretest was made, only the commited data have been cached back
since the call lv_info_by_lvid() triggers mda read operation.
However call of lv_suspend_if_active() also reads precommited metadata.
The problem is visible in this sequence of calls:
vg_write(), suspend_lv(), vg_commit(), resume_lv()
which may end with leaving outdated mda in lvm cache, since vg_write()
drops cached metadata and vg_commit() only transforms precommited
to commited metadata, but in the case of pretesting we have
no precommited mda available so the cache will continue to use
old metadata. This happens, when suspend LV is inactive.
Sharing char* with field has a problem in error path,
when we allocate event, but fail to allocate timeout string.
Instead of creating complicated error paths to resolve
it individually stop using unions, and let the resource
to be released in a simple _free_message().
For example, the old call and reference:
find_config_tree_str(cmd, "devices/dir", DEFAULT_DEV_DIR)
...now becomes:
find_config_tree_str(cmd, devices_dir_CFG)
So we're referring to the named configuration ID instead
of passing the configuration path and the default value
is taken from central config definition in config_settings.h
automatically.
On glibc, those are erroneously (namespace pollution) pulled in via
other headers. this doesn't work with conformant libcs (musl libc in
this case), we simply need to include all needed headers.
Signed-Off-By: John Spencer <maillist-lvm@barfooze.de>
For reseting locale environment into significantly less memory
consuming version 'C' - use LC_ALL instead of LANG since it has
higher priority in locale settings.
Otherwise we may observe whole locale-archive which might be
over 100MB on i.e. Fedora systems locked in memory with
some daemons.
The idea is to avoid a period when an existing VG is not mapped to either the
old or the new name. (Note that the brief "blackout" was present even if the
name did not actually change.) We instead allow a brief overlap of a VG existing
under both names, i.e. a query for a VG might succeed but before a lock is
acquired the VG disappears.
This reverts commit ed23da95b6.
Hash table device_to_pvid seems to contain references to
already deleted pvids and so revert to the older
behaviour using allocated memory.
All operations on shared hash tables need to be protected by mutexes. Moreover,
lookup and subsequent key removal need to happen atomically, to avoid races (and
possible double free-ing) between multiple threads trying to manipulate the same
VG.
If we fail to get memory for mutex, hash the mutex
or fail somewhere along pthread function calls
return allocated resources back and unlock vg_lock_map mutex.
Since we are doing just dump and function doesn't report
any error, explicitely ignore return values from
dm_config_write_node and dm_asprintf.
Same applies for the logging function.
clvmd -d option parsing was not working properly.
clvmd -d 2 (with space) has been ignored because of
'::' used in getopt string, and as failsafe it's been used '1'.
Later this debug_arg has been ignored and debug_opt was used
instead which happend to have value '1'.
Submitted-by: Robert Milasan <rmilasan at suse.com>
Reported-by: Robert Milasan <rmilasan at suse.com>
Try to bring the lvmetad usage text and man page closer to the code.
There seem to be 3 useful ways to use -d with lvmetad at the moment:
-d all
-d wire
-d debug
(They can also be comma-separated like -d wire,debug.)
Prior to the last release, -d, -dd and -ddd were supported.
Fail if an unrecognised debug arg is supplied on the command line.
Change -V to report the same version as the lvm binary: previously it
just reported version 0.
Reset counter after thin pool resize failure.
If the pool goes above threshold, support unmounting
of all thin volumes if the lvextend fails to avoid
overfilling of the pool.
