FAT: Add new ioctl VFAT_IOCTL_GET_VOLUME_ID for reading the volume ID.
Signed-off-by: Brian Swetland <swetland@google.com>
diff --git a/fs/fat/fat.h b/fs/fat/fat.h
index 8276cc2..74fe5d3 100644
--- a/fs/fat/fat.h
+++ b/fs/fat/fat.h
@@ -78,6 +78,7 @@
const void *dir_ops; /* Opaque; default directory operations */
int dir_per_block; /* dir entries per block */
int dir_per_block_bits; /* log2(dir_per_block) */
+ unsigned long vol_id; /* volume ID */
int fatent_shift;
struct fatent_operations *fatent_ops;