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These settins are customizable by profiles:
allocation/thin_pool_zero
allocation/thin_pool_discards
allocation/thin_pool_chunk_size
activation/thin_pool_autoextend_threshold
activation/thin_pool_autoextend_percent
Besides the classical configuration checks (type checking and
checking whether the item is recognized by lvm tools) for profiles,
do an extra check whether the configuration setting is customizable
by a profile at all. Give a warning message if not.
Before, the status of the configuration check (config_def_check fn call)
was saved directly in global configuration definitinion array (as part
of the cfg_def_item_t/flags)
This patch introduces the "struct cft_check_handle" that defines
configuration check parameters as well as separate place to store
the status (status here means CFG_USED and CFG_VALID flags, formerly
saved in cfg_def_item_t/flags). This struct can hold config check
parameters as well as the status for each config tree separately,
thus making it possible to run several instances of config_def_check
without interference.
Just to make it more clear and also not to confuse
config_valid with check against config definition
(and its 'valid' flag within the config defintion tree).
The command to change the profile for existing VG/LV:
"vgchange/lvchange --profile <profile_name>"
The command to detach any existing profile from VG/LV:
"vgchange/lvchange --detachprofile"
If "vgcreate/lvcreate --profile <profile_name>" is used, the profile
name is automatically stored in metadata for making it possible to
load it automatically next time the VG/LV is used.
This is per VG/LV profile loading on demand. The profile itself is saved
in struct volume_group/logical_volume as "profile" field so we can
reference it whenever needed.
When placing the profile in a configuration cascade, this sequence is
used exactly:
CONFIG_STRING -> CONFIG_PROFILE -> CONFIG_FILE/MERGED_FILES
So if the profile is used, it overloads the lvm.conf (and any
existing tag configs). However, if "--config" is used to define
a custom configuration on command line, this overloads even the
profile config!
This patch adds --profile arg to lvm cmds and adds config/profile_dir
configuration setting to select the directory where profiles are stored
By default it's /etc/lvm/profile.
The profiles are added by using new "add_profile" fn and then loaded
using the "load_profile" fn. All profiles are stored in a cmd context
within the new "struct profile_params":
struct profile_params {
const char *dir;
struct profile *global_profile;
struct dm_list profiles_to_load;
struct dm_list profiles;
};
...where "dir" is the directory with profiles, "global_profile" is
the profile that is set globally via the --profile arg (IOW, not
set per VG/LV basis based on metadata record) and the "profiles"
is the list with loaded profiles.
Configuration profiles are selected configuration items that can
be loaded dynamically on demand and overlayed over existing
configuration on demand (either on cmd line by selecting the profile
name to be used globally or retrieved from metadata and used per
VG/LV basis only).
The default directory where profiles are stored is configurable
at compile time with --with-default-profile-subdir.
A helper type that helps with identification of the configuration source
which makes handling the configuration cascade a bit easier, mainly
removing and adding configuration trees to cascade dynamically.
Currently, the possible types are:
CONFIG_UNDEFINED - configuration is not defined yet (not initialized)
CONFIG_FILE - one file configuration
CONFIG_MERGED_FILES - configuration that is a result of merging more files into one
CONFIG_STRING - configuration string typed on cmd line directly
CONFIG_PROFILE - profile configuration (the new type of configuration, patches will follow...)
Also, generalize existing "remove_overridden_config_tree" to work with
configuration type identification in a cascade. Before, it was just
the CONFIG_STRING we used. Now, we need some more to add in a
cascade (like the CONFIG_PROFILE). So, we have:
struct dm_config_tree *remove_config_tree_by_source(struct cmd_context *cmd, config_source_t source);
config_source_t config_get_source_type(struct dm_config_tree *cft);
... for removing the tree by its source type from the cascade and
simply getting the source type.
In the last update not all code paths have set the archived flag.
If we run in test mode or without archiving enabled - set the bit
as well - so test whether archiving has been called succesfully
will be ok. (in relase fix).
Do not keep multiple archives for the executed command.
Reuse the ALLOCATABLE_PV from pv status for
ARCHIVED_VG vg status. Mark VG with the bit with the
first archivation.
Instead of calling syslog() from signal event handler,
run all logging code in the main loop.
Also it needs to take the lock and check for list
only when really needed.
...not the other way round as it was before. This way it makes
more sense as BA use is exceptional and it's useless to
contaminate the log with messages about BA not being found
in metadata.
Show 'at' pointer address with pool name.
It's useful for debugging to be able to locate pointer address in the
debug trace log. It's only available when compiled with extra debug
compilation flag DEBUG_POOL in make.tmpl.
Since reduce the message has informational character and doesn't lead
to exit of the command - reduce the log level to info print as we
use for other similar types.
Reindent next print message.
Test the different RAID lvchange scenarios under snapshot as well.
This patch also updates calculations for where to write to an
underlying PV when testing various syncactions.
