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linux/fs/hfsplus/hfsplus_fs.h
Josef Bacik 02c24a8218 fs: push i_mutex and filemap_write_and_wait down into ->fsync() handlers 
Btrfs needs to be able to control how filemap_write_and_wait_range() is called
in fsync to make it less of a painful operation, so push down taking i_mutex and
the calling of filemap_write_and_wait() down into the ->fsync() handlers.  Some
file systems can drop taking the i_mutex altogether it seems, like ext3 and
ocfs2.  For correctness sake I just pushed everything down in all cases to make
sure that we keep the current behavior the same for everybody, and then each
individual fs maintainer can make up their mind about what to do from there.
Thanks,

Acked-by: Jan Kara <jack@suse.cz>
Signed-off-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-20 20:47:59 -04:00

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/*
* linux/include/linux/hfsplus_fs.h
*
* Copyright (C) 1999
* Brad Boyer (flar@pants.nu)
* (C) 2003 Ardis Technologies <roman@ardistech.com>
*
*/
#ifndef _LINUX_HFSPLUS_FS_H
#define _LINUX_HFSPLUS_FS_H
#include <linux/fs.h>
#include <linux/mutex.h>
#include <linux/buffer_head.h>
#include "hfsplus_raw.h"
#define DBG_BNODE_REFS 0x00000001
#define DBG_BNODE_MOD 0x00000002
#define DBG_CAT_MOD 0x00000004
#define DBG_INODE 0x00000008
#define DBG_SUPER 0x00000010
#define DBG_EXTENT 0x00000020
#define DBG_BITMAP 0x00000040
#if 0
#define DBG_MASK (DBG_EXTENT|DBG_INODE|DBG_BNODE_MOD)
#define DBG_MASK (DBG_BNODE_MOD|DBG_CAT_MOD|DBG_INODE)
#define DBG_MASK (DBG_CAT_MOD|DBG_BNODE_REFS|DBG_INODE|DBG_EXTENT)
#endif
#define DBG_MASK (0)
#define dprint(flg, fmt, args...) \
if (flg & DBG_MASK) \
printk(fmt , ## args)
/* Runtime config options */
#define HFSPLUS_DEF_CR_TYPE 0x3F3F3F3F /* '????' */
#define HFSPLUS_TYPE_DATA 0x00
#define HFSPLUS_TYPE_RSRC 0xFF
typedef int (*btree_keycmp)(const hfsplus_btree_key *,
const hfsplus_btree_key *);
#define NODE_HASH_SIZE 256
/* An HFS+ BTree held in memory */
struct hfs_btree {
struct super_block *sb;
struct inode *inode;
btree_keycmp keycmp;
u32 cnid;
u32 root;
u32 leaf_count;
u32 leaf_head;
u32 leaf_tail;
u32 node_count;
u32 free_nodes;
u32 attributes;
unsigned int node_size;
unsigned int node_size_shift;
unsigned int max_key_len;
unsigned int depth;
struct mutex tree_lock;
unsigned int pages_per_bnode;
spinlock_t hash_lock;
struct hfs_bnode *node_hash[NODE_HASH_SIZE];
int node_hash_cnt;
};
struct page;
/* An HFS+ BTree node in memory */
struct hfs_bnode {
struct hfs_btree *tree;
u32 prev;
u32 this;
u32 next;
u32 parent;
u16 num_recs;
u8 type;
u8 height;
struct hfs_bnode *next_hash;
unsigned long flags;
wait_queue_head_t lock_wq;
atomic_t refcnt;
unsigned int page_offset;
struct page *page[0];
};
#define HFS_BNODE_LOCK 0
#define HFS_BNODE_ERROR 1
#define HFS_BNODE_NEW 2
#define HFS_BNODE_DIRTY 3
#define HFS_BNODE_DELETED 4
/*
* HFS+ superblock info (built from Volume Header on disk)
*/
struct hfsplus_vh;
struct hfs_btree;
struct hfsplus_sb_info {
struct hfsplus_vh *s_vhdr;
struct hfsplus_vh *s_backup_vhdr;
struct hfs_btree *ext_tree;
struct hfs_btree *cat_tree;
struct hfs_btree *attr_tree;
struct inode *alloc_file;
struct inode *hidden_dir;
struct nls_table *nls;
/* Runtime variables */
u32 blockoffset;
sector_t part_start;
sector_t sect_count;
int fs_shift;
/* immutable data from the volume header */
u32 alloc_blksz;
int alloc_blksz_shift;
u32 total_blocks;
u32 data_clump_blocks, rsrc_clump_blocks;
/* mutable data from the volume header, protected by alloc_mutex */
u32 free_blocks;
struct mutex alloc_mutex;
/* mutable data from the volume header, protected by vh_mutex */
u32 next_cnid;
u32 file_count;
u32 folder_count;
struct mutex vh_mutex;
/* Config options */
u32 creator;
u32 type;
umode_t umask;
uid_t uid;
gid_t gid;
int part, session;
unsigned long flags;
};
#define HFSPLUS_SB_WRITEBACKUP 0
#define HFSPLUS_SB_NODECOMPOSE 1
#define HFSPLUS_SB_FORCE 2
#define HFSPLUS_SB_HFSX 3
#define HFSPLUS_SB_CASEFOLD 4
#define HFSPLUS_SB_NOBARRIER 5
static inline struct hfsplus_sb_info *HFSPLUS_SB(struct super_block *sb)
{
return sb->s_fs_info;
}
struct hfsplus_inode_info {
atomic_t opencnt;
/*
* Extent allocation information, protected by extents_lock.
*/
u32 first_blocks;
u32 clump_blocks;
u32 alloc_blocks;
u32 cached_start;
u32 cached_blocks;
hfsplus_extent_rec first_extents;
hfsplus_extent_rec cached_extents;
unsigned int extent_state;
struct mutex extents_lock;
/*
* Immutable data.
*/
struct inode *rsrc_inode;
__be32 create_date;
/*
* Protected by sbi->vh_mutex.
*/
u32 linkid;
/*
* Accessed using atomic bitops.
*/
unsigned long flags;
/*
* Protected by i_mutex.
*/
sector_t fs_blocks;
u8 userflags; /* BSD user file flags */
struct list_head open_dir_list;
loff_t phys_size;
struct inode vfs_inode;
};
#define HFSPLUS_EXT_DIRTY 0x0001
#define HFSPLUS_EXT_NEW 0x0002
#define HFSPLUS_I_RSRC 0 /* represents a resource fork */
#define HFSPLUS_I_CAT_DIRTY 1 /* has changes in the catalog tree */
#define HFSPLUS_I_EXT_DIRTY 2 /* has changes in the extent tree */
#define HFSPLUS_I_ALLOC_DIRTY 3 /* has changes in the allocation file */
#define HFSPLUS_IS_RSRC(inode) \
test_bit(HFSPLUS_I_RSRC, &HFSPLUS_I(inode)->flags)
static inline struct hfsplus_inode_info *HFSPLUS_I(struct inode *inode)
{
return list_entry(inode, struct hfsplus_inode_info, vfs_inode);
}
/*
* Mark an inode dirty, and also mark the btree in which the
* specific type of metadata is stored.
* For data or metadata that gets written back by into the catalog btree
* by hfsplus_write_inode a plain mark_inode_dirty call is enough.
*/
static inline void hfsplus_mark_inode_dirty(struct inode *inode,
unsigned int flag)
{
set_bit(flag, &HFSPLUS_I(inode)->flags);
mark_inode_dirty(inode);
}
struct hfs_find_data {
/* filled by caller */
hfsplus_btree_key *search_key;
hfsplus_btree_key *key;
/* filled by find */
struct hfs_btree *tree;
struct hfs_bnode *bnode;
/* filled by findrec */
int record;
int keyoffset, keylength;
int entryoffset, entrylength;
};
struct hfsplus_readdir_data {
struct list_head list;
struct file *file;
struct hfsplus_cat_key key;
};
#define hfs_btree_open hfsplus_btree_open
#define hfs_btree_close hfsplus_btree_close
#define hfs_btree_write hfsplus_btree_write
#define hfs_bmap_alloc hfsplus_bmap_alloc
#define hfs_bmap_free hfsplus_bmap_free
#define hfs_bnode_read hfsplus_bnode_read
#define hfs_bnode_read_u16 hfsplus_bnode_read_u16
#define hfs_bnode_read_u8 hfsplus_bnode_read_u8
#define hfs_bnode_read_key hfsplus_bnode_read_key
#define hfs_bnode_write hfsplus_bnode_write
#define hfs_bnode_write_u16 hfsplus_bnode_write_u16
#define hfs_bnode_clear hfsplus_bnode_clear
#define hfs_bnode_copy hfsplus_bnode_copy
#define hfs_bnode_move hfsplus_bnode_move
#define hfs_bnode_dump hfsplus_bnode_dump
#define hfs_bnode_unlink hfsplus_bnode_unlink
#define hfs_bnode_findhash hfsplus_bnode_findhash
#define hfs_bnode_find hfsplus_bnode_find
#define hfs_bnode_unhash hfsplus_bnode_unhash
#define hfs_bnode_free hfsplus_bnode_free
#define hfs_bnode_create hfsplus_bnode_create
#define hfs_bnode_get hfsplus_bnode_get
#define hfs_bnode_put hfsplus_bnode_put
#define hfs_brec_lenoff hfsplus_brec_lenoff
#define hfs_brec_keylen hfsplus_brec_keylen
#define hfs_brec_insert hfsplus_brec_insert
#define hfs_brec_remove hfsplus_brec_remove
#define hfs_find_init hfsplus_find_init
#define hfs_find_exit hfsplus_find_exit
#define __hfs_brec_find __hplusfs_brec_find
#define hfs_brec_find hfsplus_brec_find
#define hfs_brec_read hfsplus_brec_read
#define hfs_brec_goto hfsplus_brec_goto
#define hfs_part_find hfsplus_part_find
/*
* definitions for ext2 flag ioctls (linux really needs a generic
* interface for this).
*/
/* ext2 ioctls (EXT2_IOC_GETFLAGS and EXT2_IOC_SETFLAGS) to support
* chattr/lsattr */
#define HFSPLUS_IOC_EXT2_GETFLAGS FS_IOC_GETFLAGS
#define HFSPLUS_IOC_EXT2_SETFLAGS FS_IOC_SETFLAGS
/*
* Functions in any *.c used in other files
*/
/* bitmap.c */
int hfsplus_block_allocate(struct super_block *, u32, u32, u32 *);
int hfsplus_block_free(struct super_block *, u32, u32);
/* btree.c */
struct hfs_btree *hfs_btree_open(struct super_block *, u32);
void hfs_btree_close(struct hfs_btree *);
void hfs_btree_write(struct hfs_btree *);
struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *);
void hfs_bmap_free(struct hfs_bnode *);
/* bnode.c */
void hfs_bnode_read(struct hfs_bnode *, void *, int, int);
u16 hfs_bnode_read_u16(struct hfs_bnode *, int);
u8 hfs_bnode_read_u8(struct hfs_bnode *, int);
void hfs_bnode_read_key(struct hfs_bnode *, void *, int);
void hfs_bnode_write(struct hfs_bnode *, void *, int, int);
void hfs_bnode_write_u16(struct hfs_bnode *, int, u16);
void hfs_bnode_clear(struct hfs_bnode *, int, int);
void hfs_bnode_copy(struct hfs_bnode *, int,
struct hfs_bnode *, int, int);
void hfs_bnode_move(struct hfs_bnode *, int, int, int);
void hfs_bnode_dump(struct hfs_bnode *);
void hfs_bnode_unlink(struct hfs_bnode *);
struct hfs_bnode *hfs_bnode_findhash(struct hfs_btree *, u32);
struct hfs_bnode *hfs_bnode_find(struct hfs_btree *, u32);
void hfs_bnode_unhash(struct hfs_bnode *);
void hfs_bnode_free(struct hfs_bnode *);
struct hfs_bnode *hfs_bnode_create(struct hfs_btree *, u32);
void hfs_bnode_get(struct hfs_bnode *);
void hfs_bnode_put(struct hfs_bnode *);
/* brec.c */
u16 hfs_brec_lenoff(struct hfs_bnode *, u16, u16 *);
u16 hfs_brec_keylen(struct hfs_bnode *, u16);
int hfs_brec_insert(struct hfs_find_data *, void *, int);
int hfs_brec_remove(struct hfs_find_data *);
/* bfind.c */
int hfs_find_init(struct hfs_btree *, struct hfs_find_data *);
void hfs_find_exit(struct hfs_find_data *);
int __hfs_brec_find(struct hfs_bnode *, struct hfs_find_data *);
int hfs_brec_find(struct hfs_find_data *);
int hfs_brec_read(struct hfs_find_data *, void *, int);
int hfs_brec_goto(struct hfs_find_data *, int);
/* catalog.c */
int hfsplus_cat_case_cmp_key(const hfsplus_btree_key *,
const hfsplus_btree_key *);
int hfsplus_cat_bin_cmp_key(const hfsplus_btree_key *,
const hfsplus_btree_key *);
void hfsplus_cat_build_key(struct super_block *sb,
hfsplus_btree_key *, u32, struct qstr *);
int hfsplus_find_cat(struct super_block *, u32, struct hfs_find_data *);
int hfsplus_create_cat(u32, struct inode *, struct qstr *, struct inode *);
int hfsplus_delete_cat(u32, struct inode *, struct qstr *);
int hfsplus_rename_cat(u32, struct inode *, struct qstr *,
struct inode *, struct qstr *);
void hfsplus_cat_set_perms(struct inode *inode, struct hfsplus_perm *perms);
/* dir.c */
extern const struct inode_operations hfsplus_dir_inode_operations;
extern const struct file_operations hfsplus_dir_operations;
/* extents.c */
int hfsplus_ext_cmp_key(const hfsplus_btree_key *, const hfsplus_btree_key *);
void hfsplus_ext_write_extent(struct inode *);
int hfsplus_get_block(struct inode *, sector_t, struct buffer_head *, int);
int hfsplus_free_fork(struct super_block *, u32,
struct hfsplus_fork_raw *, int);
int hfsplus_file_extend(struct inode *);
void hfsplus_file_truncate(struct inode *);
/* inode.c */
extern const struct address_space_operations hfsplus_aops;
extern const struct address_space_operations hfsplus_btree_aops;
extern const struct dentry_operations hfsplus_dentry_operations;
void hfsplus_inode_read_fork(struct inode *, struct hfsplus_fork_raw *);
void hfsplus_inode_write_fork(struct inode *, struct hfsplus_fork_raw *);
int hfsplus_cat_read_inode(struct inode *, struct hfs_find_data *);
int hfsplus_cat_write_inode(struct inode *);
struct inode *hfsplus_new_inode(struct super_block *, int);
void hfsplus_delete_inode(struct inode *);
int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end,
int datasync);
/* ioctl.c */
long hfsplus_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);
int hfsplus_setxattr(struct dentry *dentry, const char *name,
const void *value, size_t size, int flags);
ssize_t hfsplus_getxattr(struct dentry *dentry, const char *name,
void *value, size_t size);
ssize_t hfsplus_listxattr(struct dentry *dentry, char *buffer, size_t size);
/* options.c */
int hfsplus_parse_options(char *, struct hfsplus_sb_info *);
int hfsplus_parse_options_remount(char *input, int *force);
void hfsplus_fill_defaults(struct hfsplus_sb_info *);
int hfsplus_show_options(struct seq_file *, struct vfsmount *);
/* super.c */
struct inode *hfsplus_iget(struct super_block *, unsigned long);
int hfsplus_sync_fs(struct super_block *sb, int wait);
/* tables.c */
extern u16 hfsplus_case_fold_table[];
extern u16 hfsplus_decompose_table[];
extern u16 hfsplus_compose_table[];
/* unicode.c */
int hfsplus_strcasecmp(const struct hfsplus_unistr *,
const struct hfsplus_unistr *);
int hfsplus_strcmp(const struct hfsplus_unistr *,
const struct hfsplus_unistr *);
int hfsplus_uni2asc(struct super_block *,
const struct hfsplus_unistr *, char *, int *);
int hfsplus_asc2uni(struct super_block *,
struct hfsplus_unistr *, const char *, int);
int hfsplus_hash_dentry(const struct dentry *dentry,
const struct inode *inode, struct qstr *str);
int hfsplus_compare_dentry(const struct dentry *parent,
const struct inode *pinode,
const struct dentry *dentry, const struct inode *inode,
unsigned int len, const char *str, const struct qstr *name);
/* wrapper.c */
int hfsplus_read_wrapper(struct super_block *);
int hfs_part_find(struct super_block *, sector_t *, sector_t *);
int hfsplus_submit_bio(struct block_device *bdev, sector_t sector,
void *data, int rw);
/* time macros */
#define __hfsp_mt2ut(t) (be32_to_cpu(t) - 2082844800U)
#define __hfsp_ut2mt(t) (cpu_to_be32(t + 2082844800U))
/* compatibility */
#define hfsp_mt2ut(t) (struct timespec){ .tv_sec = __hfsp_mt2ut(t) }
#define hfsp_ut2mt(t) __hfsp_ut2mt((t).tv_sec)
#define hfsp_now2mt() __hfsp_ut2mt(get_seconds())
#endif
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