From: Karel Zak <kzak@redhat.com>
Date: Tue, 17 Jun 2014 10:15:01 +0000 (+0200)
Subject: lib/sysfs: add sysfs_devno_is_wholedisk()
X-Git-Tag: v2.25-rc1~22
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b55e5886ea8691e32abe2415119e43b94761fd95;p=thirdparty%2Futil-linux.git

lib/sysfs: add sysfs_devno_is_wholedisk()

Signed-off-by: Karel Zak <kzak@redhat.com>
---

diff --git a/include/sysfs.h b/include/sysfs.h
index 2b77bf6dab..85a8910c64 100644
--- a/include/sysfs.h
+++ b/include/sysfs.h
@@ -74,6 +74,7 @@ extern int sysfs_devno_to_wholedisk(dev_t dev, char *diskname,
             size_t len, dev_t *diskdevno);
 
 extern int sysfs_devno_is_lvm_private(dev_t devno);
+extern int sysfs_devno_is_wholedisk(dev_t devno);
 
 extern int sysfs_scsi_get_hctl(struct sysfs_cxt *cxt, int *h,
 			       int *c, int *t, int *l);
diff --git a/lib/sysfs.c b/lib/sysfs.c
index fe85f34cfe..0d8afa5606 100644
--- a/lib/sysfs.c
+++ b/lib/sysfs.c
@@ -539,6 +539,10 @@ static int get_dm_wholedisk(struct sysfs_cxt *cxt, char *diskname,
     return rc;
 }
 
+/*
+ * Returns by @diskdevno whole disk device devno and (optionaly) by
+ * @diskname the whole disk device name.
+ */
 int sysfs_devno_to_wholedisk(dev_t dev, char *diskname,
             size_t len, dev_t *diskdevno)
 {
@@ -658,6 +662,20 @@ int sysfs_devno_is_lvm_private(dev_t devno)
 	return rc;
 }
 
+/*
+ * Return 0 or 1, or < 0 in case of error
+ */
+int sysfs_devno_is_wholedisk(dev_t devno)
+{
+	dev_t disk;
+	int rc;
+
+	if (sysfs_devno_to_wholedisk(devno, NULL, 0, &disk) != 0)
+		return -1;
+
+	return devno == disk;
+}
+
 int sysfs_scsi_get_hctl(struct sysfs_cxt *cxt, int *h, int *c, int *t, int *l)
 {
 	char buf[PATH_MAX], *hctl;