/*
 * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it would be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write the Free Software Foundation,
 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
#ifndef __XFS_INODE_H__
#define __XFS_INODE_H__

struct xfs_dinode;
struct xfs_dinode_core;


/*
 * Fork identifiers.
 */
#define XFS_DATA_FORK   0
#define XFS_ATTR_FORK   1

/*
 * The following xfs_ext_irec_t struct introduces a second (top) level
 * to the in-core extent allocation scheme. These structs are allocated
 * in a contiguous block, creating an indirection array where each entry
 * (irec) contains a pointer to a buffer of in-core extent records which
 * it manages. Each extent buffer is 4k in size, since 4k is the system
 * page size on Linux i386 and systems with larger page sizes don't seem
 * to gain much, if anything, by using their native page size as the
 * extent buffer size. Also, using 4k extent buffers everywhere provides
 * a consistent interface for CXFS across different platforms.
 *
 * There is currently no limit on the number of irec's (extent lists)
 * allowed, so heavily fragmented files may require an indirection array
 * which spans multiple system pages of memory. The number of extents
 * which would require this amount of contiguous memory is very large
 * and should not cause problems in the foreseeable future. However,
 * if the memory needed for the contiguous array ever becomes a problem,
 * it is possible that a third level of indirection may be required.
 */
typedef struct xfs_ext_irec {
        xfs_bmbt_rec_host_t *er_extbuf; /* block of extent records */
        xfs_extnum_t    er_extoff;      /* extent offset in file */
        xfs_extnum_t    er_extcount;    /* number of extents in page/block */
} xfs_ext_irec_t;

/*
 * File incore extent information, present for each of data & attr forks.
 */
#define XFS_IEXT_BUFSZ          4096
#define XFS_LINEAR_EXTS         (XFS_IEXT_BUFSZ / (uint)sizeof(xfs_bmbt_rec_t))
#define XFS_INLINE_EXTS         2
#define XFS_INLINE_DATA         32
typedef struct xfs_ifork {
        int                     if_bytes;       /* bytes in if_u1 */
        int                     if_real_bytes;  /* bytes allocated in if_u1 */
        xfs_bmbt_block_t        *if_broot;      /* file's incore btree root */
        short                   if_broot_bytes; /* bytes allocated for root */
        unsigned char           if_flags;       /* per-fork flags */
        unsigned char           if_ext_max;     /* max # of extent records */
        xfs_extnum_t            if_lastex;      /* last if_extents used */
        union {
                xfs_bmbt_rec_host_t *if_extents;/* linear map file exts */
                xfs_ext_irec_t  *if_ext_irec;   /* irec map file exts */
                char            *if_data;       /* inline file data */
        } if_u1;
        union {
                xfs_bmbt_rec_host_t if_inline_ext[XFS_INLINE_EXTS];
                                                /* very small file extents */
                char            if_inline_data[XFS_INLINE_DATA];
                                                /* very small file data */
                xfs_dev_t       if_rdev;        /* dev number if special */
                uuid_t          if_uuid;        /* mount point value */
        } if_u2;
} xfs_ifork_t;

/*
 * Flags for xfs_ichgtime().
 */
#define XFS_ICHGTIME_MOD        0x1     /* data fork modification timestamp */
#define XFS_ICHGTIME_CHG        0x2     /* inode field change timestamp */

/*
 * Per-fork incore inode flags.
 */
#define XFS_IFINLINE    0x01    /* Inline data is read in */
#define XFS_IFEXTENTS   0x02    /* All extent pointers are read in */
#define XFS_IFBROOT     0x04    /* i_broot points to the bmap b-tree root */
#define XFS_IFEXTIREC   0x08    /* Indirection array of extent blocks */

/*
 * Flags for xfs_itobp(), xfs_imap() and xfs_dilocate().
 */
#define XFS_IMAP_LOOKUP         0x1
#define XFS_IMAP_BULKSTAT       0x2

#ifdef __KERNEL__
struct bhv_desc;
struct cred;
struct ktrace;
struct xfs_buf;
struct xfs_bmap_free;
struct xfs_bmbt_irec;
struct xfs_bmbt_block;
struct xfs_inode;
struct xfs_inode_log_item;
struct xfs_mount;
struct xfs_trans;
struct xfs_dquot;

#if defined(XFS_ILOCK_TRACE)
#define XFS_ILOCK_KTRACE_SIZE   32
extern ktrace_t *xfs_ilock_trace_buf;
extern void xfs_ilock_trace(struct xfs_inode *, int, unsigned int, inst_t *);
#else
#define xfs_ilock_trace(i,n,f,ra)
#endif

typedef struct dm_attrs_s {
        __uint32_t      da_dmevmask;    /* DMIG event mask */
        __uint16_t      da_dmstate;     /* DMIG state info */
        __uint16_t      da_pad;         /* DMIG extra padding */
} dm_attrs_t;

/*
 * This is the xfs in-core inode structure.
 * Most of the on-disk inode is embedded in the i_d field.
 *
 * The extent pointers/inline file space, however, are managed
 * separately.  The memory for this information is pointed to by
 * the if_u1 unions depending on the type of the data.
 * This is used to linearize the array of extents for fast in-core
 * access.  This is used until the file's number of extents
 * surpasses XFS_MAX_INCORE_EXTENTS, at which point all extent pointers
 * are accessed through the buffer cache.
 *
 * Other state kept in the in-core inode is used for identification,
 * locking, transactional updating, etc of the inode.
 *
 * Generally, we do not want to hold the i_rlock while holding the
 * i_ilock. Hierarchy is i_iolock followed by i_rlock.
 *
 * xfs_iptr_t contains all the inode fields upto and including the
 * i_mnext and i_mprev fields, it is used as a marker in the inode
 * chain off the mount structure by xfs_sync calls.
 */

typedef struct xfs_ictimestamp {
        __int32_t       t_sec;          /* timestamp seconds */
        __int32_t       t_nsec;         /* timestamp nanoseconds */
} xfs_ictimestamp_t;

/*
 * NOTE:  This structure must be kept identical to struct xfs_dinode_core
 *        in xfs_dinode.h except for the endianess annotations.
 */
typedef struct xfs_icdinode {
        __uint16_t      di_magic;       /* inode magic # = XFS_DINODE_MAGIC */
        __uint16_t      di_mode;        /* mode and type of file */
        __int8_t        di_version;     /* inode version */
        __int8_t        di_format;      /* format of di_c data */
        __uint16_t      di_onlink;      /* old number of links to file */
        __uint32_t      di_uid;         /* owner's user id */
        __uint32_t      di_gid;         /* owner's group id */
        __uint32_t      di_nlink;       /* number of links to file */
        __uint16_t      di_projid;      /* owner's project id */
        __uint8_t       di_pad[8];      /* unused, zeroed space */
        __uint16_t      di_flushiter;   /* incremented on flush */
        xfs_ictimestamp_t di_atime;     /* time last accessed */
        xfs_ictimestamp_t di_mtime;     /* time last modified */
        xfs_ictimestamp_t di_ctime;     /* time created/inode modified */
        xfs_fsize_t     di_size;        /* number of bytes in file */
        xfs_drfsbno_t   di_nblocks;     /* # of direct & btree blocks used */
        xfs_extlen_t    di_extsize;     /* basic/minimum extent size for file */
        xfs_extnum_t    di_nextents;    /* number of extents in data fork */
        xfs_aextnum_t   di_anextents;   /* number of extents in attribute fork*/
        __uint8_t       di_forkoff;     /* attr fork offs, <<3 for 64b align */
        __int8_t        di_aformat;     /* format of attr fork's data */
        __uint32_t      di_dmevmask;    /* DMIG event mask */
        __uint16_t      di_dmstate;     /* DMIG state info */
        __uint16_t      di_flags;       /* random flags, XFS_DIFLAG_... */
        __uint32_t      di_gen;         /* generation number */
} xfs_icdinode_t;

typedef struct {
        struct xfs_inode        *ip_mnext;      /* next inode in mount list */
        struct xfs_inode        *ip_mprev;      /* ptr to prev inode */
        struct xfs_mount        *ip_mount;      /* fs mount struct ptr */
} xfs_iptr_t;

typedef struct xfs_inode {
        /* Inode linking and identification information. */
        struct xfs_inode        *i_mnext;       /* next inode in mount list */
        struct xfs_inode        *i_mprev;       /* ptr to prev inode */
        struct xfs_mount        *i_mount;       /* fs mount struct ptr */
        struct list_head        i_reclaim;      /* reclaim list */
        struct inode            *i_vnode;       /* vnode backpointer */
        struct xfs_dquot        *i_udquot;      /* user dquot */
        struct xfs_dquot        *i_gdquot;      /* group dquot */

        /* Inode location stuff */
        xfs_ino_t               i_ino;          /* inode number (agno/agino)*/
        xfs_daddr_t             i_blkno;        /* blkno of inode buffer */
        ushort                  i_len;          /* len of inode buffer */
        ushort                  i_boffset;      /* off of inode in buffer */

        /* Extent information. */
        xfs_ifork_t             *i_afp;         /* attribute fork pointer */
        xfs_ifork_t             i_df;           /* data fork */

        /* Transaction and locking information. */
        struct xfs_trans        *i_transp;      /* ptr to owning transaction*/
        struct xfs_inode_log_item *i_itemp;     /* logging information */
        mrlock_t                i_lock;         /* inode lock */
        mrlock_t                i_iolock;       /* inode IO lock */
        struct completion       i_flush;        /* inode flush completion q */
        atomic_t                i_pincount;     /* inode pin count */
        wait_queue_head_t       i_ipin_wait;    /* inode pinning wait queue */
        spinlock_t              i_flags_lock;   /* inode i_flags lock */
        /* Miscellaneous state. */
        unsigned short          i_flags;        /* see defined flags below */
        unsigned char           i_update_core;  /* timestamps/size is dirty */
        unsigned char           i_update_size;  /* di_size field is dirty */
        unsigned int            i_gen;          /* generation count */
        unsigned int            i_delayed_blks; /* count of delay alloc blks */

        xfs_icdinode_t          i_d;            /* most of ondisk inode */

        xfs_fsize_t             i_size;         /* in-memory size */
        xfs_fsize_t             i_new_size;     /* size when write completes */
        atomic_t                i_iocount;      /* outstanding I/O count */
        /* Trace buffers per inode. */
#ifdef XFS_INODE_TRACE
        struct ktrace           *i_trace;       /* general inode trace */
#endif
#ifdef XFS_BMAP_TRACE
        struct ktrace           *i_xtrace;      /* inode extent list trace */
#endif
#ifdef XFS_BMBT_TRACE
        struct ktrace           *i_btrace;      /* inode bmap btree trace */
#endif
#ifdef XFS_RW_TRACE
        struct ktrace           *i_rwtrace;     /* inode read/write trace */
#endif
#ifdef XFS_ILOCK_TRACE
        struct ktrace           *i_lock_trace;  /* inode lock/unlock trace */
#endif
#ifdef XFS_DIR2_TRACE
        struct ktrace           *i_dir_trace;   /* inode directory trace */
#endif
} xfs_inode_t;

#define XFS_ISIZE(ip)   (((ip)->i_d.di_mode & S_IFMT) == S_IFREG) ? \
                                (ip)->i_size : (ip)->i_d.di_size;

/* Convert from vfs inode to xfs inode */
static inline struct xfs_inode *XFS_I(struct inode *inode)
{
        return (struct xfs_inode *)inode->i_private;
}

/* convert from xfs inode to vfs inode */
static inline struct inode *VFS_I(struct xfs_inode *ip)
{
        return (struct inode *)ip->i_vnode;
}

/*
 * i_flags helper functions
 */
static inline void
__xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
{
        ip->i_flags |= flags;
}

static inline void
xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
{
        spin_lock(&ip->i_flags_lock);
        __xfs_iflags_set(ip, flags);
        spin_unlock(&ip->i_flags_lock);
}

static inline void
xfs_iflags_clear(xfs_inode_t *ip, unsigned short flags)
{
        spin_lock(&ip->i_flags_lock);
        ip->i_flags &= ~flags;
        spin_unlock(&ip->i_flags_lock);
}

static inline int
__xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
{
        return (ip->i_flags & flags);
}

static inline int
xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
{
        int ret;
        spin_lock(&ip->i_flags_lock);
        ret = __xfs_iflags_test(ip, flags);
        spin_unlock(&ip->i_flags_lock);
        return ret;
}

static inline int
xfs_iflags_test_and_clear(xfs_inode_t *ip, unsigned short flags)
{
        int ret;

        spin_lock(&ip->i_flags_lock);
        ret = ip->i_flags & flags;
        if (ret)
                ip->i_flags &= ~flags;
        spin_unlock(&ip->i_flags_lock);
        return ret;
}
#endif  /* __KERNEL__ */


/*
 * Fork handling.
 */

#define XFS_IFORK_Q(ip)                 ((ip)->i_d.di_forkoff != 0)
#define XFS_IFORK_BOFF(ip)              ((int)((ip)->i_d.di_forkoff << 3))

#define XFS_IFORK_PTR(ip,w)             \
        ((w) == XFS_DATA_FORK ? \
                &(ip)->i_df : \
                (ip)->i_afp)
#define XFS_IFORK_DSIZE(ip) \
        (XFS_IFORK_Q(ip) ? \
                XFS_IFORK_BOFF(ip) : \
                XFS_LITINO((ip)->i_mount))
#define XFS_IFORK_ASIZE(ip) \
        (XFS_IFORK_Q(ip) ? \
                XFS_LITINO((ip)->i_mount) - XFS_IFORK_BOFF(ip) : \
                0)
#define XFS_IFORK_SIZE(ip,w) \
        ((w) == XFS_DATA_FORK ? \
                XFS_IFORK_DSIZE(ip) : \
                XFS_IFORK_ASIZE(ip))
#define XFS_IFORK_FORMAT(ip,w) \
        ((w) == XFS_DATA_FORK ? \
                (ip)->i_d.di_format : \
                (ip)->i_d.di_aformat)
#define XFS_IFORK_FMT_SET(ip,w,n) \
        ((w) == XFS_DATA_FORK ? \
                ((ip)->i_d.di_format = (n)) : \
                ((ip)->i_d.di_aformat = (n)))
#define XFS_IFORK_NEXTENTS(ip,w) \
        ((w) == XFS_DATA_FORK ? \
                (ip)->i_d.di_nextents : \
                (ip)->i_d.di_anextents)
#define XFS_IFORK_NEXT_SET(ip,w,n) \
        ((w) == XFS_DATA_FORK ? \
                ((ip)->i_d.di_nextents = (n)) : \
                ((ip)->i_d.di_anextents = (n)))

#ifdef __KERNEL__

/*
 * In-core inode flags.
 */
#define XFS_IGRIO       0x0001  /* inode used for guaranteed rate i/o */
#define XFS_IUIOSZ      0x0002  /* inode i/o sizes have been explicitly set */
#define XFS_IQUIESCE    0x0004  /* we have started quiescing for this inode */
#define XFS_IRECLAIM    0x0008  /* we have started reclaiming this inode    */
#define XFS_ISTALE      0x0010  /* inode has been staled */
#define XFS_IRECLAIMABLE 0x0020 /* inode can be reclaimed */
#define XFS_INEW        0x0040
#define XFS_IFILESTREAM 0x0080  /* inode is in a filestream directory */
#define XFS_IMODIFIED   0x0100  /* XFS inode state possibly differs */
                                /* to the Linux inode state. */
#define XFS_ITRUNCATED  0x0200  /* truncated down so flush-on-close */

/*
 * Flags for inode locking.
 * Bit ranges:  1<<1  - 1<<16-1 -- iolock/ilock modes (bitfield)
 *              1<<16 - 1<<32-1 -- lockdep annotation (integers)
 */
#define XFS_IOLOCK_EXCL         (1<<0)
#define XFS_IOLOCK_SHARED       (1<<1)
#define XFS_ILOCK_EXCL          (1<<2)
#define XFS_ILOCK_SHARED        (1<<3)
#define XFS_IUNLOCK_NONOTIFY    (1<<4)

#define XFS_LOCK_MASK           (XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED \
                                | XFS_ILOCK_EXCL | XFS_ILOCK_SHARED)

/*
 * Flags for lockdep annotations.
 *
 * XFS_I[O]LOCK_PARENT - for operations that require locking two inodes
 * (ie directory operations that require locking a directory inode and
 * an entry inode).  The first inode gets locked with this flag so it
 * gets a lockdep subclass of 1 and the second lock will have a lockdep
 * subclass of 0.
 *
 * XFS_LOCK_INUMORDER - for locking several inodes at the some time
 * with xfs_lock_inodes().  This flag is used as the starting subclass
 * and each subsequent lock acquired will increment the subclass by one.
 * So the first lock acquired will have a lockdep subclass of 2, the
 * second lock will have a lockdep subclass of 3, and so on. It is
 * the responsibility of the class builder to shift this to the correct
 * portion of the lock_mode lockdep mask.
 */
#define XFS_LOCK_PARENT         1
#define XFS_LOCK_INUMORDER      2

#define XFS_IOLOCK_SHIFT        16
#define XFS_IOLOCK_PARENT       (XFS_LOCK_PARENT << XFS_IOLOCK_SHIFT)

#define XFS_ILOCK_SHIFT         24
#define XFS_ILOCK_PARENT        (XFS_LOCK_PARENT << XFS_ILOCK_SHIFT)

#define XFS_IOLOCK_DEP_MASK     0x00ff0000
#define XFS_ILOCK_DEP_MASK      0xff000000
#define XFS_LOCK_DEP_MASK       (XFS_IOLOCK_DEP_MASK | XFS_ILOCK_DEP_MASK)

#define XFS_IOLOCK_DEP(flags)   (((flags) & XFS_IOLOCK_DEP_MASK) >> XFS_IOLOCK_SHIFT)
#define XFS_ILOCK_DEP(flags)    (((flags) & XFS_ILOCK_DEP_MASK) >> XFS_ILOCK_SHIFT)

/*
 * Flags for xfs_iflush()
 */
#define XFS_IFLUSH_DELWRI_ELSE_SYNC     1
#define XFS_IFLUSH_DELWRI_ELSE_ASYNC    2
#define XFS_IFLUSH_SYNC                 3
#define XFS_IFLUSH_ASYNC                4
#define XFS_IFLUSH_DELWRI               5
#define XFS_IFLUSH_ASYNC_NOBLOCK        6

/*
 * Flags for xfs_itruncate_start().
 */
#define XFS_ITRUNC_DEFINITE     0x1
#define XFS_ITRUNC_MAYBE        0x2

/*
 * For multiple groups support: if S_ISGID bit is set in the parent
 * directory, group of new file is set to that of the parent, and
 * new subdirectory gets S_ISGID bit from parent.
 */
#define XFS_INHERIT_GID(pip)    \
        (((pip)->i_mount->m_flags & XFS_MOUNT_GRPID) || \
         ((pip)->i_d.di_mode & S_ISGID))

/*
 * Flags for xfs_iget()
 */
#define XFS_IGET_CREATE         0x1
#define XFS_IGET_BULKSTAT       0x2

/*
 * xfs_iget.c prototypes.
 */
void            xfs_ihash_init(struct xfs_mount *);
void            xfs_ihash_free(struct xfs_mount *);
xfs_inode_t     *xfs_inode_incore(struct xfs_mount *, xfs_ino_t,
                                  struct xfs_trans *);
int             xfs_iget(struct xfs_mount *, struct xfs_trans *, xfs_ino_t,
                         uint, uint, xfs_inode_t **, xfs_daddr_t);
void            xfs_iput(xfs_inode_t *, uint);
void            xfs_iput_new(xfs_inode_t *, uint);
void            xfs_ilock(xfs_inode_t *, uint);
int             xfs_ilock_nowait(xfs_inode_t *, uint);
void            xfs_iunlock(xfs_inode_t *, uint);
void            xfs_ilock_demote(xfs_inode_t *, uint);
int             xfs_isilocked(xfs_inode_t *, uint);
uint            xfs_ilock_map_shared(xfs_inode_t *);
void            xfs_iunlock_map_shared(xfs_inode_t *, uint);
void            xfs_ireclaim(xfs_inode_t *);
int             xfs_finish_reclaim(xfs_inode_t *, int, int);
int             xfs_finish_reclaim_all(struct xfs_mount *, int);

/*
 * xfs_inode.c prototypes.
 */
int             xfs_itobp(struct xfs_mount *, struct xfs_trans *,
                          xfs_inode_t *, struct xfs_dinode **, struct xfs_buf **,
                          xfs_daddr_t, uint, uint);
int             xfs_iread(struct xfs_mount *, struct xfs_trans *, xfs_ino_t,
                          xfs_inode_t **, xfs_daddr_t, uint);
int             xfs_iread_extents(struct xfs_trans *, xfs_inode_t *, int);
int             xfs_ialloc(struct xfs_trans *, xfs_inode_t *, mode_t,
                           xfs_nlink_t, xfs_dev_t, struct cred *, xfs_prid_t,
                           int, struct xfs_buf **, boolean_t *, xfs_inode_t **);
void            xfs_dinode_from_disk(struct xfs_icdinode *,
                                     struct xfs_dinode_core *);
void            xfs_dinode_to_disk(struct xfs_dinode_core *,
                                   struct xfs_icdinode *);

uint            xfs_ip2xflags(struct xfs_inode *);
uint            xfs_dic2xflags(struct xfs_dinode *);
int             xfs_ifree(struct xfs_trans *, xfs_inode_t *,
                           struct xfs_bmap_free *);
int             xfs_itruncate_start(xfs_inode_t *, uint, xfs_fsize_t);
int             xfs_itruncate_finish(struct xfs_trans **, xfs_inode_t *,
                                     xfs_fsize_t, int, int);
int             xfs_iunlink(struct xfs_trans *, xfs_inode_t *);

void            xfs_idestroy_fork(xfs_inode_t *, int);
void            xfs_idestroy(xfs_inode_t *);
void            xfs_idata_realloc(xfs_inode_t *, int, int);
void            xfs_iextract(xfs_inode_t *);
void            xfs_iext_realloc(xfs_inode_t *, int, int);
void            xfs_iroot_realloc(xfs_inode_t *, int, int);
void            xfs_ipin(xfs_inode_t *);
void            xfs_iunpin(xfs_inode_t *);
int             xfs_iextents_copy(xfs_inode_t *, xfs_bmbt_rec_t *, int);
int             xfs_iflush(xfs_inode_t *, uint);
void            xfs_iflush_all(struct xfs_mount *);
void            xfs_ichgtime(xfs_inode_t *, int);
xfs_fsize_t     xfs_file_last_byte(xfs_inode_t *);
void            xfs_lock_inodes(xfs_inode_t **, int, uint);
void            xfs_lock_two_inodes(xfs_inode_t *, xfs_inode_t *, uint);

void            xfs_synchronize_atime(xfs_inode_t *);
void            xfs_mark_inode_dirty_sync(xfs_inode_t *);

xfs_bmbt_rec_host_t *xfs_iext_get_ext(xfs_ifork_t *, xfs_extnum_t);
void            xfs_iext_insert(xfs_ifork_t *, xfs_extnum_t, xfs_extnum_t,
                                xfs_bmbt_irec_t *);
void            xfs_iext_add(xfs_ifork_t *, xfs_extnum_t, int);
void            xfs_iext_add_indirect_multi(xfs_ifork_t *, int, xfs_extnum_t, int);
void            xfs_iext_remove(xfs_ifork_t *, xfs_extnum_t, int);
void            xfs_iext_remove_inline(xfs_ifork_t *, xfs_extnum_t, int);
void            xfs_iext_remove_direct(xfs_ifork_t *, xfs_extnum_t, int);
void            xfs_iext_remove_indirect(xfs_ifork_t *, xfs_extnum_t, int);
void            xfs_iext_realloc_direct(xfs_ifork_t *, int);
void            xfs_iext_realloc_indirect(xfs_ifork_t *, int);
void            xfs_iext_indirect_to_direct(xfs_ifork_t *);
void            xfs_iext_direct_to_inline(xfs_ifork_t *, xfs_extnum_t);
void            xfs_iext_inline_to_direct(xfs_ifork_t *, int);
void            xfs_iext_destroy(xfs_ifork_t *);
xfs_bmbt_rec_host_t *xfs_iext_bno_to_ext(xfs_ifork_t *, xfs_fileoff_t, int *);
xfs_ext_irec_t  *xfs_iext_bno_to_irec(xfs_ifork_t *, xfs_fileoff_t, int *);
xfs_ext_irec_t  *xfs_iext_idx_to_irec(xfs_ifork_t *, xfs_extnum_t *, int *, int);
void            xfs_iext_irec_init(xfs_ifork_t *);
xfs_ext_irec_t *xfs_iext_irec_new(xfs_ifork_t *, int);
void            xfs_iext_irec_remove(xfs_ifork_t *, int);
void            xfs_iext_irec_compact(xfs_ifork_t *);
void            xfs_iext_irec_compact_pages(xfs_ifork_t *);
void            xfs_iext_irec_compact_full(xfs_ifork_t *);
void            xfs_iext_irec_update_extoffs(xfs_ifork_t *, int, int);

#define xfs_ipincount(ip)       ((unsigned int) atomic_read(&ip->i_pincount))

#ifdef DEBUG
void            xfs_isize_check(struct xfs_mount *, xfs_inode_t *, xfs_fsize_t);
#else   /* DEBUG */
#define xfs_isize_check(mp, ip, isize)
#endif  /* DEBUG */

#if defined(DEBUG)
void            xfs_inobp_check(struct xfs_mount *, struct xfs_buf *);
#else
#define xfs_inobp_check(mp, bp)
#endif /* DEBUG */

extern struct kmem_zone *xfs_ifork_zone;
extern struct kmem_zone *xfs_inode_zone;
extern struct kmem_zone *xfs_ili_zone;

/*
 * Manage the i_flush queue embedded in the inode.  This completion
 * queue synchronizes processes attempting to flush the in-core
 * inode back to disk.
 */
static inline void xfs_iflock(xfs_inode_t *ip)
{
        wait_for_completion(&ip->i_flush);
}

static inline int xfs_iflock_nowait(xfs_inode_t *ip)
{
        return try_wait_for_completion(&ip->i_flush);
}

static inline void xfs_ifunlock(xfs_inode_t *ip)
{
        complete(&ip->i_flush);
}

#endif  /* __KERNEL__ */

#endif  /* __XFS_INODE_H__ */