root/fs/ufs/ufs.h

INCLUDED FROM

DEFINITIONS

1. UFS_SB
2. UFS_I
3. ufs_dtog
4. ufs_dtogd

#ifndef _UFS_UFS_H
#define _UFS_UFS_H 1

#define UFS_MAX_GROUP_LOADED 8
#define UFS_CGNO_EMPTY ((unsigned)-1)

struct ufs_sb_private_info;
struct ufs_cg_private_info;
struct ufs_csum;

struct ufs_sb_info {
        struct ufs_sb_private_info * s_uspi;
        struct ufs_csum * s_csp;
        unsigned s_bytesex;
        unsigned s_flags;
        struct buffer_head ** s_ucg;
        struct ufs_cg_private_info * s_ucpi[UFS_MAX_GROUP_LOADED];
        unsigned s_cgno[UFS_MAX_GROUP_LOADED];
        unsigned short s_cg_loaded;
        unsigned s_mount_opt;
};

struct ufs_inode_info {
        union {
                __fs32  i_data[15];
                __u8    i_symlink[4*15];
                __fs64  u2_i_data[15];
        } i_u1;
        __u32   i_flags;
        __u32   i_shadow;
        __u32   i_unused1;
        __u32   i_unused2;
        __u32   i_oeftflag;
        __u16   i_osync;
        __u64   i_lastfrag;
        __u32   i_dir_start_lookup;
        struct inode vfs_inode;
};

/* mount options */
#define UFS_MOUNT_ONERROR               0x0000000F
#define UFS_MOUNT_ONERROR_PANIC         0x00000001
#define UFS_MOUNT_ONERROR_LOCK          0x00000002
#define UFS_MOUNT_ONERROR_UMOUNT        0x00000004
#define UFS_MOUNT_ONERROR_REPAIR        0x00000008

#define UFS_MOUNT_UFSTYPE               0x0000FFF0
#define UFS_MOUNT_UFSTYPE_OLD           0x00000010
#define UFS_MOUNT_UFSTYPE_44BSD         0x00000020
#define UFS_MOUNT_UFSTYPE_SUN           0x00000040
#define UFS_MOUNT_UFSTYPE_NEXTSTEP      0x00000080
#define UFS_MOUNT_UFSTYPE_NEXTSTEP_CD   0x00000100
#define UFS_MOUNT_UFSTYPE_OPENSTEP      0x00000200
#define UFS_MOUNT_UFSTYPE_SUNx86        0x00000400
#define UFS_MOUNT_UFSTYPE_HP            0x00000800
#define UFS_MOUNT_UFSTYPE_UFS2          0x00001000
#define UFS_MOUNT_UFSTYPE_SUNOS         0x00002000

#define ufs_clear_opt(o,opt)    o &= ~UFS_MOUNT_##opt
#define ufs_set_opt(o,opt)      o |= UFS_MOUNT_##opt
#define ufs_test_opt(o,opt)     ((o) & UFS_MOUNT_##opt)

/*
 * Debug code
 */
#ifdef CONFIG_UFS_DEBUG
#       define UFSD(f, a...)    {                                       \
                printk ("UFSD (%s, %d): %s:",                           \
                        __FILE__, __LINE__, __func__);          \
                printk (f, ## a);                                       \
        }
#else
#       define UFSD(f, a...)    /**/
#endif

/* balloc.c */
extern void ufs_free_fragments (struct inode *, u64, unsigned);
extern void ufs_free_blocks (struct inode *, u64, unsigned);
extern u64 ufs_new_fragments(struct inode *, void *, u64, u64,
                             unsigned, int *, struct page *);

/* cylinder.c */
extern struct ufs_cg_private_info * ufs_load_cylinder (struct super_block *, unsigned);
extern void ufs_put_cylinder (struct super_block *, unsigned);

/* dir.c */
extern const struct inode_operations ufs_dir_inode_operations;
extern int ufs_add_link (struct dentry *, struct inode *);
extern ino_t ufs_inode_by_name(struct inode *, struct dentry *);
extern int ufs_make_empty(struct inode *, struct inode *);
extern struct ufs_dir_entry *ufs_find_entry(struct inode *, struct dentry *, struct page **);
extern int ufs_delete_entry(struct inode *, struct ufs_dir_entry *, struct page *);
extern int ufs_empty_dir (struct inode *);
extern struct ufs_dir_entry *ufs_dotdot(struct inode *, struct page **);
extern void ufs_set_link(struct inode *dir, struct ufs_dir_entry *de,
                         struct page *page, struct inode *inode);

/* file.c */
extern const struct inode_operations ufs_file_inode_operations;
extern const struct file_operations ufs_file_operations;

extern const struct address_space_operations ufs_aops;

/* ialloc.c */
extern void ufs_free_inode (struct inode *inode);
extern struct inode * ufs_new_inode (struct inode *, int);

/* inode.c */
extern struct inode *ufs_iget(struct super_block *, unsigned long);
extern int ufs_write_inode (struct inode *, int);
extern int ufs_sync_inode (struct inode *);
extern void ufs_delete_inode (struct inode *);
extern struct buffer_head * ufs_bread (struct inode *, unsigned, int, int *);
extern int ufs_getfrag_block (struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create);

/* namei.c */
extern const struct file_operations ufs_dir_operations;

/* super.c */
extern void ufs_warning (struct super_block *, const char *, const char *, ...) __attribute__ ((format (printf, 3, 4)));
extern void ufs_error (struct super_block *, const char *, const char *, ...) __attribute__ ((format (printf, 3, 4)));
extern void ufs_panic (struct super_block *, const char *, const char *, ...) __attribute__ ((format (printf, 3, 4)));

/* symlink.c */
extern const struct inode_operations ufs_fast_symlink_inode_operations;

/* truncate.c */
extern int ufs_truncate (struct inode *, loff_t);

static inline struct ufs_sb_info *UFS_SB(struct super_block *sb)
{
        return sb->s_fs_info;
}

static inline struct ufs_inode_info *UFS_I(struct inode *inode)
{
        return container_of(inode, struct ufs_inode_info, vfs_inode);
}

/*
 * Give cylinder group number for a file system block.
 * Give cylinder group block number for a file system block.
 */
/* #define      ufs_dtog(d)     ((d) / uspi->s_fpg) */
static inline u64 ufs_dtog(struct ufs_sb_private_info * uspi, u64 b)
{
        do_div(b, uspi->s_fpg);
        return b;
}
/* #define      ufs_dtogd(d)    ((d) % uspi->s_fpg) */
static inline u32 ufs_dtogd(struct ufs_sb_private_info * uspi, u64 b)
{
        return do_div(b, uspi->s_fpg);
}

#endif /* _UFS_UFS_H */