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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/fs/befs/befs.h
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/* SPDX-License-Identifier: GPL-2.0 */

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/*

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 * befs.h

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 *

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 * Copyright (C) 2001-2002 Will Dyson <[email protected]>

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 * Copyright (C) 1999 Makoto Kato ([email protected])

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 */

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#ifndef _LINUX_BEFS_H

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#define _LINUX_BEFS_H

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#include "befs_fs_types.h"

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/* used in debug.c */

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#define BEFS_VERSION "0.9.3"

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typedef u64 befs_blocknr_t;

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/*

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 * BeFS in memory structures

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 */

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struct befs_mount_options {

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	kgid_t gid;

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	kuid_t uid;

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	int use_gid;

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	int use_uid;

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	int debug;

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	char *iocharset;

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};

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struct befs_sb_info {

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	u32 magic1;

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	u32 block_size;

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	u32 block_shift;

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	int byte_order;

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	befs_off_t num_blocks;

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	befs_off_t used_blocks;

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	u32 inode_size;

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	u32 magic2;

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	/* Allocation group information */

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	u32 blocks_per_ag;

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	u32 ag_shift;

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	u32 num_ags;

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	/* State of the superblock */

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	u32 flags;

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	/* Journal log entry */

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	befs_block_run log_blocks;

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	befs_off_t log_start;

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	befs_off_t log_end;

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	befs_inode_addr root_dir;

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	befs_inode_addr indices;

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	u32 magic3;

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	struct befs_mount_options mount_opts;

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	struct nls_table *nls;

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};

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struct befs_inode_info {

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	u32 i_flags;

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	u32 i_type;

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	befs_inode_addr i_inode_num;

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	befs_inode_addr i_parent;

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	befs_inode_addr i_attribute;

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	union {

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		befs_data_stream ds;

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		char symlink[BEFS_SYMLINK_LEN];

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	} i_data;

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	struct inode vfs_inode;

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};

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enum befs_err {

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	BEFS_OK,

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	BEFS_ERR,

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	BEFS_BAD_INODE,

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	BEFS_BT_END,

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	BEFS_BT_EMPTY,

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	BEFS_BT_MATCH,

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	BEFS_BT_OVERFLOW,

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	BEFS_BT_NOT_FOUND

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};

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/****************************/

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/* debug.c */

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__printf(2, 3)

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void befs_error(const struct super_block *sb, const char *fmt, ...);

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__printf(2, 3)

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void befs_warning(const struct super_block *sb, const char *fmt, ...);

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__printf(2, 3)

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void befs_debug(const struct super_block *sb, const char *fmt, ...);

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void befs_dump_super_block(const struct super_block *sb, befs_super_block *);

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void befs_dump_inode(const struct super_block *sb, befs_inode *);

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void befs_dump_index_entry(const struct super_block *sb, befs_disk_btree_super *);

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void befs_dump_index_node(const struct super_block *sb, befs_btree_nodehead *);

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/****************************/

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/* Gets a pointer to the private portion of the super_block

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 * structure from the public part

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 */

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static inline struct befs_sb_info *

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BEFS_SB(const struct super_block *super)

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{

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	return (struct befs_sb_info *) super->s_fs_info;

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}

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static inline struct befs_inode_info *

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BEFS_I(const struct inode *inode)

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{

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	return container_of(inode, struct befs_inode_info, vfs_inode);

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}

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static inline befs_blocknr_t

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iaddr2blockno(struct super_block *sb, const befs_inode_addr *iaddr)

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{

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	return ((iaddr->allocation_group << BEFS_SB(sb)->ag_shift) +

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		iaddr->start);

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}

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static inline befs_inode_addr

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blockno2iaddr(struct super_block *sb, befs_blocknr_t blockno)

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{

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	befs_inode_addr iaddr;

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	iaddr.allocation_group = blockno >> BEFS_SB(sb)->ag_shift;

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	iaddr.start =

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	    blockno - (iaddr.allocation_group << BEFS_SB(sb)->ag_shift);

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	iaddr.len = 1;

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	return iaddr;

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}

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static inline unsigned int

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befs_iaddrs_per_block(struct super_block *sb)

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{

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	return BEFS_SB(sb)->block_size / sizeof(befs_disk_inode_addr);

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}

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#include "endian.h"

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#endif				/* _LINUX_BEFS_H */

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