v4.19.13 snapshot.
diff --git a/fs/udf/udf_i.h b/fs/udf/udf_i.h
new file mode 100644
index 0000000..2ef0e21
--- /dev/null
+++ b/fs/udf/udf_i.h
@@ -0,0 +1,63 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _UDF_I_H
+#define _UDF_I_H
+
+struct extent_position {
+ struct buffer_head *bh;
+ uint32_t offset;
+ struct kernel_lb_addr block;
+};
+
+struct udf_ext_cache {
+ /* Extent position */
+ struct extent_position epos;
+ /* Start logical offset in bytes */
+ loff_t lstart;
+};
+
+/*
+ * The i_data_sem and i_mutex serve for protection of allocation information
+ * of a regular files and symlinks. This includes all extents belonging to
+ * the file/symlink, a fact whether data are in-inode or in external data
+ * blocks, preallocation, goal block information... When extents are read,
+ * i_mutex or i_data_sem must be held (for reading is enough in case of
+ * i_data_sem). When extents are changed, i_data_sem must be held for writing
+ * and also i_mutex must be held.
+ *
+ * For directories i_mutex is used for all the necessary protection.
+ */
+
+struct udf_inode_info {
+ struct timespec64 i_crtime;
+ /* Physical address of inode */
+ struct kernel_lb_addr i_location;
+ __u64 i_unique;
+ __u32 i_lenEAttr;
+ __u32 i_lenAlloc;
+ __u64 i_lenExtents;
+ __u32 i_next_alloc_block;
+ __u32 i_next_alloc_goal;
+ __u32 i_checkpoint;
+ unsigned i_alloc_type : 3;
+ unsigned i_efe : 1; /* extendedFileEntry */
+ unsigned i_use : 1; /* unallocSpaceEntry */
+ unsigned i_strat4096 : 1;
+ unsigned reserved : 26;
+ union {
+ struct short_ad *i_sad;
+ struct long_ad *i_lad;
+ __u8 *i_data;
+ } i_ext;
+ struct rw_semaphore i_data_sem;
+ struct udf_ext_cache cached_extent;
+ /* Spinlock for protecting extent cache */
+ spinlock_t i_extent_cache_lock;
+ struct inode vfs_inode;
+};
+
+static inline struct udf_inode_info *UDF_I(struct inode *inode)
+{
+ return container_of(inode, struct udf_inode_info, vfs_inode);
+}
+
+#endif /* _UDF_I_H) */