[lvm-devel] [PATCH 1/2] lvm2app: Add function to retrieve the origin.
Tony Asleson
tasleson at redhat.com
Thu Apr 11 20:58:50 UTC 2013
Signed-off-by: Tony Asleson <tasleson at redhat.com>
---
liblvm/lvm2app.h | 16 ++++++++++++++++
liblvm/lvm_lv.c | 5 +++++
2 files changed, 21 insertions(+)
diff --git a/liblvm/lvm2app.h b/liblvm/lvm2app.h
index 15827ac..369c300 100644
--- a/liblvm/lvm2app.h
+++ b/liblvm/lvm2app.h
@@ -1223,6 +1223,22 @@ const char *lvm_lv_get_name(const lv_t lv);
const char *lvm_lv_get_attr(const lv_t lv);
/**
+ * Get the origin of a snapshot.
+ *
+ * \memberof lv_t
+ *
+ * The memory allocated for the name is tied to the vg_t handle and will be
+ * released when lvm_vg_close() is called.
+ *
+ * \param lv
+ * Logical volume handle.
+ *
+ * \return
+ * Null if the logical volume is not a snapshot, else origin name.
+ */
+const char *lvm_lv_get_origin(const lv_t lv);
+
+/**
* Get the current size in bytes of a logical volume.
*
* \memberof lv_t
diff --git a/liblvm/lvm_lv.c b/liblvm/lvm_lv.c
index 9d3ae79..f244a60 100644
--- a/liblvm/lvm_lv.c
+++ b/liblvm/lvm_lv.c
@@ -53,6 +53,11 @@ const char *lvm_lv_get_attr(const lv_t lv)
return lv_attr_dup(lv->vg->vgmem, lv);
}
+const char *lvm_lv_get_origin(const lv_t lv)
+{
+ return lv_origin_dup(lv->vg->vgmem, lv);
+}
+
struct lvm_property_value lvm_lv_get_property(const lv_t lv, const char *name)
{
return get_property(NULL, NULL, lv, NULL, NULL, name);
--
1.8.1.4
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