/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __UDF_DECL_H
#define __UDF_DECL_H

#define pr_fmt(fmt) "UDF-fs: " fmt

#include "ecma_167.h"
#include "osta_udf.h"

#include <linux/fs.h>
#include <linux/types.h>
#include <linux/buffer_head.h>
#include <linux/udf_fs_i.h>

#include "udf_sb.h"
#include "udfend.h"
#include "udf_i.h"

#define UDF_DEFAULT_PREALLOC_BLOCKS     8

extern __printf(3, 4) void _udf_err(struct super_block *sb,
                const char *function, const char *fmt, ...);
#define udf_err(sb, fmt, ...)                                   \
        _udf_err(sb, __func__, fmt, ##__VA_ARGS__)

extern __printf(3, 4) void _udf_warn(struct super_block *sb,
                const char *function, const char *fmt, ...);
#define udf_warn(sb, fmt, ...)                                  \
        _udf_warn(sb, __func__, fmt, ##__VA_ARGS__)

#define udf_info(fmt, ...)                                      \
        pr_info("INFO " fmt, ##__VA_ARGS__)

#define udf_debug(fmt, ...)                                     \
        pr_debug("%s:%d:%s: " fmt, __FILE__, __LINE__, __func__, ##__VA_ARGS__)

#define UDF_EXTENT_LENGTH_MASK  0x3FFFFFFF
#define UDF_EXTENT_FLAG_MASK    0xC0000000

#define UDF_INVALID_ID ((uint32_t)-1)

#define UDF_NAME_PAD            4
#define UDF_NAME_LEN            254
#define UDF_NAME_LEN_CS0        255

static inline size_t udf_file_entry_alloc_offset(struct inode *inode)
{
        struct udf_inode_info *iinfo = UDF_I(inode);
        if (iinfo->i_use)
                return sizeof(struct unallocSpaceEntry);
        else if (iinfo->i_efe)
                return sizeof(struct extendedFileEntry) + iinfo->i_lenEAttr;
        else
                return sizeof(struct fileEntry) + iinfo->i_lenEAttr;
}

static inline size_t udf_ext0_offset(struct inode *inode)
{
        if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
                return udf_file_entry_alloc_offset(inode);
        else
                return 0;
}

/* computes tag checksum */
u8 udf_tag_checksum(const struct tag *t);

typedef uint32_t udf_pblk_t;

struct dentry;
struct inode;
struct task_struct;
struct buffer_head;
struct super_block;

extern const struct export_operations udf_export_ops;
extern const struct inode_operations udf_dir_inode_operations;
extern const struct file_operations udf_dir_operations;
extern const struct inode_operations udf_file_inode_operations;
extern const struct file_operations udf_file_operations;
extern const struct inode_operations udf_symlink_inode_operations;
extern const struct address_space_operations udf_aops;
extern const struct address_space_operations udf_symlink_aops;

struct udf_fileident_iter {
        struct inode *dir;              /* Directory we are working with */
        loff_t pos;                     /* Logical position in a dir */
        struct buffer_head *bh[2];      /* Buffer containing 'pos' and possibly
                                         * next buffer if entry straddles
                                         * blocks */
        struct kernel_lb_addr eloc;     /* Start of extent containing 'pos' */
        uint32_t elen;                  /* Length of extent containing 'pos' */
        sector_t loffset;               /* Block offset of 'pos' within above
                                         * extent */
        struct extent_position epos;    /* Position after the above extent */
        struct fileIdentDesc fi;        /* Copied directory entry */
        uint8_t *name;                  /* Pointer to entry name */
        uint8_t *namebuf;               /* Storage for entry name in case
                                         * the name is split between two blocks
                                         */
};

struct udf_vds_record {
        uint32_t block;
        uint32_t volDescSeqNum;
};

struct generic_desc {
        struct tag      descTag;
        __le32          volDescSeqNum;
};


/* super.c */

static inline void udf_updated_lvid(struct super_block *sb)
{
        struct buffer_head *bh = UDF_SB(sb)->s_lvid_bh;

        BUG_ON(!bh);
        WARN_ON_ONCE(((struct logicalVolIntegrityDesc *)
                     bh->b_data)->integrityType !=
                     cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN));
        UDF_SB(sb)->s_lvid_dirty = 1;
}
extern u64 lvid_get_unique_id(struct super_block *sb);
struct inode *udf_find_metadata_inode_efe(struct super_block *sb,
                                        u32 meta_file_loc, u32 partition_num);

/* namei.c */
static inline unsigned int udf_dir_entry_len(struct fileIdentDesc *cfi)
{
        return ALIGN(sizeof(struct fileIdentDesc) +
                le16_to_cpu(cfi->lengthOfImpUse) + cfi->lengthFileIdent,
                UDF_NAME_PAD);
}

/* file.c */
extern long udf_ioctl(struct file *, unsigned int, unsigned long);

/* inode.c */
extern struct inode *__udf_iget(struct super_block *, struct kernel_lb_addr *,
                                bool hidden_inode);
static inline struct inode *udf_iget_special(struct super_block *sb,
                                             struct kernel_lb_addr *ino)
{
        return __udf_iget(sb, ino, true);
}
static inline struct inode *udf_iget(struct super_block *sb,
                                     struct kernel_lb_addr *ino)
{
        return __udf_iget(sb, ino, false);
}
extern int udf_expand_file_adinicb(struct inode *);
extern struct buffer_head *udf_bread(struct inode *inode, udf_pblk_t block,
                                      int create, int *err);
extern int udf_setsize(struct inode *, loff_t);
extern void udf_evict_inode(struct inode *);
extern int udf_write_inode(struct inode *, struct writeback_control *wbc);
extern int inode_bmap(struct inode *inode, sector_t block,
                      struct extent_position *pos, struct kernel_lb_addr *eloc,
                      uint32_t *elen, sector_t *offset, int8_t *etype);
int udf_get_block(struct inode *, sector_t, struct buffer_head *, int);
extern int udf_setup_indirect_aext(struct inode *inode, udf_pblk_t block,
                                   struct extent_position *epos);
extern int __udf_add_aext(struct inode *inode, struct extent_position *epos,
                          struct kernel_lb_addr *eloc, uint32_t elen, int inc);
extern int udf_add_aext(struct inode *, struct extent_position *,
                        struct kernel_lb_addr *, uint32_t, int);
extern void udf_write_aext(struct inode *, struct extent_position *,
                           struct kernel_lb_addr *, uint32_t, int);
extern int8_t udf_delete_aext(struct inode *, struct extent_position);
extern int udf_next_aext(struct inode *inode, struct extent_position *epos,
                         struct kernel_lb_addr *eloc, uint32_t *elen,
                         int8_t *etype, int inc);
extern int udf_current_aext(struct inode *inode, struct extent_position *epos,
                            struct kernel_lb_addr *eloc, uint32_t *elen,
                            int8_t *etype, int inc);
extern void udf_update_extra_perms(struct inode *inode, umode_t mode);

/* misc.c */
extern struct genericFormat *udf_add_extendedattr(struct inode *, uint32_t,
                                                  uint32_t, uint8_t);
extern struct genericFormat *udf_get_extendedattr(struct inode *, uint32_t,
                                                  uint8_t);
extern struct buffer_head *udf_read_tagged(struct super_block *, uint32_t,
                                           uint32_t, uint16_t *);
extern struct buffer_head *udf_read_ptagged(struct super_block *,
                                            struct kernel_lb_addr *, uint32_t,
                                            uint16_t *);
extern void udf_update_tag(char *, int);
extern void udf_new_tag(char *, uint16_t, uint16_t, uint16_t, uint32_t, int);

/* lowlevel.c */
extern unsigned int udf_get_last_session(struct super_block *);
udf_pblk_t udf_get_last_block(struct super_block *);

/* partition.c */
extern uint32_t udf_get_pblock(struct super_block *, uint32_t, uint16_t,
                               uint32_t);
extern uint32_t udf_get_pblock_virt15(struct super_block *, uint32_t, uint16_t,
                                      uint32_t);
extern uint32_t udf_get_pblock_virt20(struct super_block *, uint32_t, uint16_t,
                                      uint32_t);
extern uint32_t udf_get_pblock_spar15(struct super_block *, uint32_t, uint16_t,
                                      uint32_t);
extern uint32_t udf_get_pblock_meta25(struct super_block *, uint32_t, uint16_t,
                                          uint32_t);
extern int udf_relocate_blocks(struct super_block *, long, long *);

static inline uint32_t
udf_get_lb_pblock(struct super_block *sb, struct kernel_lb_addr *loc,
                  uint32_t offset)
{
        return udf_get_pblock(sb, loc->logicalBlockNum,
                        loc->partitionReferenceNum, offset);
}

/* unicode.c */
extern int udf_get_filename(struct super_block *, const uint8_t *, int,
                            uint8_t *, int);
extern int udf_put_filename(struct super_block *, const uint8_t *, int,
                            uint8_t *, int);
extern int udf_dstrCS0toChar(struct super_block *, uint8_t *, int,
                             const uint8_t *, int);

/* ialloc.c */
extern void udf_free_inode(struct inode *);
extern struct inode *udf_new_inode(struct inode *, umode_t);

/* truncate.c */
extern void udf_truncate_tail_extent(struct inode *);
extern void udf_discard_prealloc(struct inode *);
extern int udf_truncate_extents(struct inode *);

/* balloc.c */
extern void udf_free_blocks(struct super_block *, struct inode *,
                            struct kernel_lb_addr *, uint32_t, uint32_t);
extern int udf_prealloc_blocks(struct super_block *, struct inode *, uint16_t,
                               uint32_t, uint32_t);
extern udf_pblk_t udf_new_block(struct super_block *sb, struct inode *inode,
                                 uint16_t partition, uint32_t goal, int *err);

/* directory.c */
int udf_fiiter_init(struct udf_fileident_iter *iter, struct inode *dir,
                    loff_t pos);
int udf_fiiter_advance(struct udf_fileident_iter *iter);
void udf_fiiter_release(struct udf_fileident_iter *iter);
void udf_fiiter_write_fi(struct udf_fileident_iter *iter, uint8_t *impuse);
void udf_fiiter_update_elen(struct udf_fileident_iter *iter, uint32_t new_elen);
int udf_fiiter_append_blk(struct udf_fileident_iter *iter);
extern struct long_ad *udf_get_filelongad(uint8_t *, int, uint32_t *, int);
extern struct short_ad *udf_get_fileshortad(uint8_t *, int, uint32_t *, int);

/* udftime.c */
extern void udf_disk_stamp_to_time(struct timespec64 *dest,
                                                struct timestamp src);
extern void udf_time_to_disk_stamp(struct timestamp *dest, struct timespec64 src);

#endif                          /* __UDF_DECL_H */