zfs_unmount_snap() should return 0 if the snapshot it's passed is not a

snapshot. Detect this indirectly by testing zsb as set by zfs_sb_hold(). This will normally happen in the case of deleting a zvol's snapshot.
dweeezil · Oct 16, 2013 · fdffb9e · fdffb9e
1 parent 29b2094
commit fdffb9e
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/module/zfs/zfs_ioctl.c b/module/zfs/zfs_ioctl.c
@@ -3370,6 +3370,10 @@ zfs_unmount_snap(const char *snapname)
 	fullname = strdup(snapname);
 
 	err = zfs_sb_hold(dsname, FTAG, &zsb, B_FALSE);
+	if (zsb == NULL) {
+		err = 0;
+		goto out;
+	}
 	if (err != 0)
 		goto out;