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This patch adds helpers to allow users to lookup a lv or pv handle by

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name (given a vg_t of course).

Signed-off-by: Dave Wysochanski <wysochanski@pobox.com>
Reviewed-by: Petr Rockai <prockai@redhat.com>
This commit is contained in:
Petr Rockai 2010-11-25 14:33:44 +00:00
parent 46f84d5cb9
commit 14b0c96bc7
3 changed files with 57 additions and 0 deletions
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34
liblvm/lvm2app.h
View File

@ -1014,6 +1014,23 @@ lv_t lvm_vg_create_lv_linear(vg_t vg, const char *name, uint64_t size);
*/
struct dm_list *lvm_lv_list_lvsegs(lv_t lv);
/**
* Lookup an LV handle in a VG by the LV name.
*
* \memberof lv_t
*
* \param vg
* VG handle obtained from lvm_vg_create() or lvm_vg_open().
*
* \param name
* Name of LV to lookup.
*
* \return
* non-NULL handle to the LV 'name' attached to the VG.
* NULL is returned if the LV name is not associated with the VG handle.
*/
lv_t lvm_lv_from_name(vg_t vg, const char *name);
/**
* Activate a logical volume.
*
@ -1488,6 +1505,23 @@ struct lvm_property_value lvm_pvseg_get_property(const pvseg_t pvseg,
*/
struct dm_list *lvm_pv_list_pvsegs(pv_t pv);
/**
* Lookup an PV handle in a VG by the PV name.
*
* \memberof pv_t
*
* \param vg
* VG handle obtained from lvm_vg_create() or lvm_vg_open().
*
* \param name
* Name of PV to lookup.
*
* \return
* non-NULL handle to the PV 'name' attached to the VG.
* NULL is returned if the PV name is not associated with the VG handle.
*/
pv_t lvm_pv_from_name(vg_t vg, const char *name);
/**
* Resize physical volume to new_size bytes.
*

11
liblvm/lvm_lv.c
View File

@ -249,6 +249,17 @@ struct dm_list *lvm_lv_list_lvsegs(lv_t lv)
return list;
}
lv_t lvm_lv_from_name(vg_t vg, const char *name)
{
struct lv_list *lvl;
dm_list_iterate_items(lvl, &vg->lvs) {
if (!strcmp(name, lvl->lv->name))
return lvl->lv;
}
return NULL;
}
int lvm_lv_resize(const lv_t lv, uint64_t new_size)
{
/* FIXME: add lv resize code here */

12
liblvm/lvm_pv.c
View File

@ -87,6 +87,18 @@ struct dm_list *lvm_pv_list_pvsegs(pv_t pv)
return list;
}
pv_t lvm_pv_from_name(vg_t vg, const char *name)
{
struct pv_list *pvl;
dm_list_iterate_items(pvl, &vg->pvs) {
if (!strcmp(name, pv_dev_name(pvl->pv)))
return pvl->pv;
}
return NULL;
}
int lvm_pv_resize(const pv_t pv, uint64_t new_size)
{
/* FIXME: add pv resize code here */