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lvm2app forces applications to start with a volume group name,
open the volume group, then operate on individual pvs. In some
cases the application may want to start with a device name rather
than the volume group name. Today, if an application wants to
do this, it must iterate through all the volume groups to find
the volume group that the specific device is attached to.
These new interfaces allow the application to avoid such overhead.
Bump the lvm2app version number to 3.
Add lvm2app functions to manage LV tags.
For lvm_lv_get_tags(), we return a list of tags, similar to other
functions that return lists. An empty list is returned if there
are no tags. NULL is returned if there is a problem obtaining
the list of tags.
Signed-off-by: Dave Wysochanski <dwysocha@redhat.com>
Add lvm2app functions to manage VG tags.
For lvm_vg_get_tags(), we return a list of tags, similar to other
functions that return lists. An empty list is returned if there
are no VG tags. NULL is returned if there is a problem obtaining
the list of tags.
Signed-off-by: Dave Wysochanski <dwysocha@redhat.com>
Adding the ability to get the seqno is important for an application to
determine if something has changed in a VG. Otherwise, the only way to
know is to open the VG with write permission and hold the handle.
Allowing the caller to override the LVM configuration with an API will
enable them to use things such as device filters.
While very flexible, there is some danger to this API in that it will
make it harder to debug setups that have a changing config and deduce
what might have happened. At some point we may want to limit the scope
of this API but for now it is as open as the --config option to lvm commands.
Update exported symbols. When I renamed lvm_reload_config to lvm_config_reload
I forgot to rename so I renamed that one here.
This I believe is the last liblvm API for now. ;-)
Signed-off-by: Dave Wysochanski <dwysocha@redhat.com>
Extend lvm_vg_write to remove pvs removed in lvm_vg_reduce. The lvm
volume_group internal structure removed_pvs is used for that. The list is
empty afterwards.
Add new test for vg->pvs emptyness to lvm_vg_write to prevent to write empty
vgs. This is needed because of lvm_vg_reduce and lv_vg_create, which creates
empty vgs.
Signed-off-by: Thomas Woerner <twoerner@redhat.com>
Acked-by: Dave Wysochanski <dwysocha@redhat.com>
Author: Dave Wysochanski <dwysocha@redhat.com>
Limited implementation but other types of activation should probably have
separate calls. We also currently do not handle pvmoves or lvconverts.
Author: Dave Wysochanski <dwysocha@redhat.com>
Add a very simple version of lvm_vg_remove_lv.
Since we currently can only create linear LVs, this simple remove function
is adequate. We must refactor lvremove_single a bit.
Author: Dave Wysochanski <dwysocha@redhat.com>
Add the most straightforward 'get' functions required for anaconda.
These are the ones that return simple uint64_t values.
The other more complex ones involve the lv_attr bits. These will
come in a separate patch series since each lv_attr bit will be returned
in a separate API instred of returning the string and requiring the
user to parse it.
Author: Dave Wysochanski <dwysocha@redhat.com>
The lvm_list_vg_{names|ids} functions do not do a scan so we provide
a liblvm function that does a scan.
Author: Dave Wysochanski <dwysocha@redhat.com>
These functions provide the capability of enumerating all vgnames and
vgids in the system. They do not do a scan of the system.
Author: Dave Wysochanski <dwysocha@redhat.com>
Caller must free the memory of the uuid / name returned.
This may not be the best memory management policy since it may lead to
memory leaks if the caller has code like this:
if (!lvm_vg_get_name(vg))
Maybe we don't care - if we do we can use pools tied to handles later
or some other scheme.
Signed-off-by: Dave Wysochanski <dwysocha@redhat.com>
Acked-by: Thomas Woerner <twoerner@redhat.com>
- Use vgmem pool to allocate a list of lvm_*_list structs
- Allocate a new list each call (list may have changed since last call)
- Add to liblvm's exported symbols
Signed-off-by: Dave Wysochanski <dwysocha@redhat.com>
Acked-by: Thomas Woerner <twoerner@redhat.com>
lvm_vg_open() calls internal vg_read() function which is the entry point
for reading an existing VG. In addition to the mode, we include a 'flags'
parameter for future extensions.
Signed-off-by: Dave Wysochanski <dwysocha@redhat.com>
Add the following VG APIs to liblvm/.exported_symbols:
-lvm_reload_config
-lvm_vg_create
-lvm_vg_extend
-lvm_vg_set_extent_size
-lvm_vg_write
-lvm_vg_close
-lvm_vg_remove
Signed-off-by: Dave Wysochanski <dwysocha@redhat.com>
Acked-by: Alasdair G Kergon <agk@redhat.com>
