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Fix and improve handling on sigint.
Always check for signal presence *before* calling of command,
so it will not call the command when break was hit.
If the command has been finished succesfully there is
no problem to mark the command ok and not report interrupt at all.
Fix cuple related stack; reports and assignments.
Previously, we have relied on UUIDs alone, and on lvmcache to make getting a
"new copy" of VG metadata fast. If the code which triggers the activation has
the correct VG metadata at hand (the version which is currently on disk), it can
now hand it to the activation code directly.
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.
We need to call sync_local_dev_names directly as pvscan uses
VG_GLOBAL lock and this one *does not* cause the synchronization
(sync_dev_names) to be called on unlock (VG_GLOBAL is not a real VG):
define unlock_vg(cmd, vol)
do { \
if (is_real_vg(vol)) \
sync_dev_names(cmd); \
(void) lock_vol(cmd, vol, LCK_VG_UNLOCK); \
} while (0)
Without this fix, we end up without udev synchronization for the
pvscan --cache (mainly for -aay that causes the VGs/LVs to be
autoactivated) and also udev synchronization cookies are then left
in the system since they're not managed properly (code before sets
up udev sync cookies, but we have to call dm_udev_wait at least once
after that to do the wait and cleanup).
Calling pvscan --cache with -aay on a PV without an MDA would spuriously fail
with an internal error, because of an incorrect assumption that a parsed VG
structure was always available. This is not true and the autoactivation handler
needs to call vg_read to obtain metadata in cases where the PV had no MDAs to
parse. Therefore, we pass vgid into the handler instead of the (possibly NULL)
VG coming from the PV's MDA.
Accept -q as the short form of --quiet.
Suppress non-essential standard output if -q is given twice.
Treat log/silent in lvm.conf as equivalent to -qq.
Review all log_print messages and change some to
log_print_unless_silent.
When silent, the following commands still produce output:
dumpconfig, lvdisplay, lvmdiskscan, lvs, pvck, pvdisplay,
pvs, version, vgcfgrestore -l, vgdisplay, vgs.
[Needs checking.]
Non-essential messages are shifted from log level 4 to log level 5
for syslog and lvm2_log_fn purposes.
Define auto_activation_handler that activates VGs/LVs automatically
based on the activation/auto_activation_volume_list (activating all
volumes by default if the list is not defined).
The autoactivation is done within the pvscan call in 69-dm-lvmetad.rules
that watches for udev events (device appearance/removal).
For now, this works for non-clustered and complete VGs only.
Define an 'activation_handler' that gets called automatically on
PV appearance/disappearance while processing the lvmetad_pv_found
and lvmetad_pv_gone functions that are supposed to update the
lvmetad state based on PV availability state. For now, the actual
support is for PV appearance only, leaving room for PV disappearance
support as well (which is a more complex problem to solve as this
needs to count with possible device stack).
Add a new activation change mode - CHANGE_AAY exposed as
'--activate ay/-aay' argument ('activate automatically').
Factor out the vgchange activation functionality for use in other
tools (like pvscan...).
Hold global lock in pvscan --lvmetad. (This might need refinement.)
Add PV name to "PV gone" messages.
Adjust some log message severities. (More changes needed.)
Since format instances will use own memory pool, it's necessary to properly
deallocate it. For now, only fid is deallocated. The PV structure itself
still uses cmd mempool mostly, but anytime we'd like to add a mempool
in the struct physical_volume, we can just rename this fn to free_pv and
add the code (like we have free_vg fn for VGs).
