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udf: add extent cache support in case of file reading
[platform/adaptation/renesas_rcar/renesas_kernel.git]
/
fs
/
udf
/
udf_i.h
diff --git
a/fs/udf/udf_i.h
b/fs/udf/udf_i.h
index
bb8309d
..
b5cd8ed
100644
(file)
--- a/
fs/udf/udf_i.h
+++ b/
fs/udf/udf_i.h
@@
-1,6
+1,19
@@
#ifndef _UDF_I_H
#define _UDF_I_H
#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 i_data_sem and i_mutex serve for protection of allocation information
* of a regular files and symlinks. This includes all extents belonging to
@@
-35,6
+48,9
@@
struct udf_inode_info {
__u8 *i_data;
} i_ext;
struct rw_semaphore i_data_sem;
__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;
};
struct inode vfs_inode;
};