/* 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;
        __u32                   i_extraPerms;
        unsigned                i_alloc_type : 3;
        unsigned                i_efe : 1;      /* extendedFileEntry */
        unsigned                i_use : 1;      /* unallocSpaceEntry */
        unsigned                i_strat4096 : 1;
        unsigned                i_streamdir : 1;
        unsigned                i_hidden : 1;   /* hidden system inode */
        unsigned                reserved : 24;
        __u8                    *i_data;
        struct kernel_lb_addr   i_locStreamdir;
        __u64                   i_lenStreams;
        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) */