Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / fs / udf / udf_i.h

diff --git a/kernel/fs/udf/udf_i.h b/kernel/fs/udf/udf_i.h
new file mode 100644 (file)
index 0000000..b5cd8ed
--- /dev/null
+++ b/kernel/fs/udf/udf_i.h
@@ -0,0 +1,62 @@
+#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 timespec         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 list_entry(inode, struct udf_inode_info, vfs_inode);
+}
+
+#endif /* _UDF_I_H) */