Remove TSD zfs_fsyncer_key

[zfs.git] / module / zfs / zvol.c

diff --git a/module/zfs/zvol.c b/module/zfs/zvol.c
index c3bd25c..7a448f1 100644 (file)
--- 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.
  */
@@ -1306,9 +1329,9 @@ __zvol_create_minor(const char *name)
        else
                zil_replay(os, zv, zvol_replay_vector);
 
+       zv->zv_objset = NULL;
 out_dmu_objset_disown:
        dmu_objset_disown(os, zvol_tag);
-       zv->zv_objset = NULL;
 out_doi:
        kmem_free(doi, sizeof(dmu_object_info_t));
 out: