From dd4097a6a49d250dbbe592b312db94504b17e5fa Mon Sep 17 00:00:00 2001
From: Dave Wysochanski <dwysocha@redhat.com>
Date: Wed, 19 May 2010 11:52:07 +0000
Subject: Add pvid_from_devname() lvmcache function.

Add supporting function for mappings from devname -> pvid -> vgname.
---
 lib/cache/lvmcache.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

(limited to 'lib/cache/lvmcache.c')

diff --git a/lib/cache/lvmcache.c b/lib/cache/lvmcache.c
index 1f1e1e6a..6e46e31c 100644
--- a/lib/cache/lvmcache.c
+++ b/lib/cache/lvmcache.c
@@ -757,6 +757,25 @@ struct device *device_from_pvid(struct cmd_context *cmd, struct id *pvid,
 	return NULL;
 }
 
+const char *pvid_from_devname(struct cmd_context *cmd,
+			      const char *devname)
+{
+	struct device *dev;
+	struct label *label;
+
+	if (!(dev = dev_cache_get(devname, cmd->filter))) {
+		log_error("%s: Couldn't find device.  Check your filters?",
+			  devname);
+		return NULL;
+	}
+
+	if (!(label_read(dev, &label, UINT64_C(0))))
+		return NULL;
+
+	return dev->pvid;
+}
+
+
 static int _free_vginfo(struct lvmcache_vginfo *vginfo)
 {
 	struct lvmcache_vginfo *primary_vginfo, *vginfo2;
-- 
cgit