X-Git-Url: https://git.camperquake.de/gitweb.cgi?a=blobdiff_plain;f=module%2Fzfs%2Fzvol.c;fp=module%2Fzfs%2Fzvol.c;h=7a448f1948fa74436713c61d642d816bba206e8a;hb=6c2856726fbae681649930d9620d9087080e58fc;hp=5d4802560201cb839ac662a8927d6380f8958b0c;hpb=5e6320cd1262de6eada39751807c31c059517d01;p=zfs.git

diff --git a/module/zfs/zvol.c b/module/zfs/zvol.c
index 5d48025..7a448f1 100644
--- a/module/zfs/zvol.c
+++ b/module/zfs/zvol.c
@@ -141,6 +141,29 @@ zvol_find_by_name(const char *name)
 	return NULL;
 }
 
+
+/*
+ * Given a path, return TRUE if path is a ZVOL.
+ */
+boolean_t
+zvol_is_zvol(const char *device)
+{
+	struct block_device *bdev;
+	unsigned int major;
+
+	bdev = lookup_bdev(device);
+	if (IS_ERR(bdev))
+		return (B_FALSE);
+
+	major = MAJOR(bdev->bd_dev);
+	bdput(bdev);
+
+	if (major == zvol_major)
+            return (B_TRUE);
+
+	return (B_FALSE);
+}
+
 /*
  * ZFS_IOC_CREATE callback handles dmu zvol and zap object creation.
  */