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xfs_trans.h

/*
 * Copyright (c) 2000-2002,2005 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_TRANS_H__
#define     __XFS_TRANS_H__

/*
 * This is the structure written in the log at the head of
 * every transaction. It identifies the type and id of the
 * transaction, and contains the number of items logged by
 * the transaction so we know how many to expect during recovery.
 *
 * Do not change the below structure without redoing the code in
 * xlog_recover_add_to_trans() and xlog_recover_add_to_cont_trans().
 */
typedef struct xfs_trans_header {
      uint        th_magic;         /* magic number */
      uint        th_type;          /* transaction type */
      __int32_t   th_tid;                 /* transaction id (unused) */
      uint        th_num_items;           /* num items logged by trans */
} xfs_trans_header_t;

#define     XFS_TRANS_HEADER_MAGIC  0x5452414e  /* TRAN */

/*
 * Log item types.
 */
#define     XFS_LI_EFI        0x1236
#define     XFS_LI_EFD        0x1237
#define     XFS_LI_IUNLINK          0x1238
#define     XFS_LI_INODE            0x123b      /* aligned ino chunks, var-size ibufs */
#define     XFS_LI_BUF        0x123c      /* v2 bufs, variable sized inode bufs */
#define     XFS_LI_DQUOT            0x123d
#define     XFS_LI_QUOTAOFF         0x123e

/*
 * Transaction types.  Used to distinguish types of buffers.
 */
#define XFS_TRANS_SETATTR_NOT_SIZE  1
#define XFS_TRANS_SETATTR_SIZE            2
#define XFS_TRANS_INACTIVE          3
#define XFS_TRANS_CREATE            4
#define XFS_TRANS_CREATE_TRUNC            5
#define XFS_TRANS_TRUNCATE_FILE           6
#define XFS_TRANS_REMOVE            7
#define XFS_TRANS_LINK              8
#define XFS_TRANS_RENAME            9
#define XFS_TRANS_MKDIR             10
#define XFS_TRANS_RMDIR             11
#define XFS_TRANS_SYMLINK           12
#define XFS_TRANS_SET_DMATTRS       13
#define XFS_TRANS_GROWFS            14
#define XFS_TRANS_STRAT_WRITE       15
#define XFS_TRANS_DIOSTRAT          16
#define     XFS_TRANS_WRITE_SYNC          17
#define     XFS_TRANS_WRITEID       18
#define     XFS_TRANS_ADDAFORK            19
#define     XFS_TRANS_ATTRINVAL           20
#define     XFS_TRANS_ATRUNCATE           21
#define     XFS_TRANS_ATTR_SET            22
#define     XFS_TRANS_ATTR_RM       23
#define     XFS_TRANS_ATTR_FLAG           24
#define     XFS_TRANS_CLEAR_AGI_BUCKET    25
#define XFS_TRANS_QM_SBCHANGE       26
/*
 * Dummy entries since we use the transaction type to index into the
 * trans_type[] in xlog_recover_print_trans_head()
 */
#define XFS_TRANS_DUMMY1            27
#define XFS_TRANS_DUMMY2            28
#define XFS_TRANS_QM_QUOTAOFF       29
#define XFS_TRANS_QM_DQALLOC        30
#define XFS_TRANS_QM_SETQLIM        31
#define XFS_TRANS_QM_DQCLUSTER            32
#define XFS_TRANS_QM_QINOCREATE           33
#define XFS_TRANS_QM_QUOTAOFF_END   34
#define XFS_TRANS_SB_UNIT           35
#define XFS_TRANS_FSYNC_TS          36
#define     XFS_TRANS_GROWFSRT_ALLOC      37
#define     XFS_TRANS_GROWFSRT_ZERO       38
#define     XFS_TRANS_GROWFSRT_FREE       39
#define     XFS_TRANS_SWAPEXT       40
#define     XFS_TRANS_SB_COUNT            41
#define     XFS_TRANS_TYPE_MAX            41
/* new transaction types need to be reflected in xfs_logprint(8) */


#ifdef __KERNEL__
struct xfs_buf;
struct xfs_buftarg;
struct xfs_efd_log_item;
struct xfs_efi_log_item;
struct xfs_inode;
struct xfs_item_ops;
struct xfs_log_iovec;
struct xfs_log_item;
struct xfs_log_item_desc;
struct xfs_mount;
struct xfs_trans;
struct xfs_dquot_acct;

typedef struct xfs_ail_entry {
      struct xfs_log_item     *ail_forw;  /* AIL forw pointer */
      struct xfs_log_item     *ail_back;  /* AIL back pointer */
} xfs_ail_entry_t;

typedef struct xfs_log_item {
      xfs_ail_entry_t               li_ail;           /* AIL pointers */
      xfs_lsn_t               li_lsn;           /* last on-disk lsn */
      struct xfs_log_item_desc      *li_desc;   /* ptr to current desc*/
      struct xfs_mount        *li_mountp; /* ptr to fs mount */
      uint                    li_type;    /* item type */
      uint                    li_flags;   /* misc flags */
      struct xfs_log_item           *li_bio_list;     /* buffer item list */
      void                    (*li_cb)(struct xfs_buf *,
                                     struct xfs_log_item *);
                                          /* buffer item iodone */
                                          /* callback func */
      struct xfs_item_ops           *li_ops;    /* function list */
} xfs_log_item_t;

#define     XFS_LI_IN_AIL     0x1
#define XFS_LI_ABORTED  0x2

typedef struct xfs_item_ops {
      uint (*iop_size)(xfs_log_item_t *);
      void (*iop_format)(xfs_log_item_t *, struct xfs_log_iovec *);
      void (*iop_pin)(xfs_log_item_t *);
      void (*iop_unpin)(xfs_log_item_t *, int);
      void (*iop_unpin_remove)(xfs_log_item_t *, struct xfs_trans *);
      uint (*iop_trylock)(xfs_log_item_t *);
      void (*iop_unlock)(xfs_log_item_t *);
      xfs_lsn_t (*iop_committed)(xfs_log_item_t *, xfs_lsn_t);
      void (*iop_push)(xfs_log_item_t *);
      void (*iop_pushbuf)(xfs_log_item_t *);
      void (*iop_committing)(xfs_log_item_t *, xfs_lsn_t);
} xfs_item_ops_t;

#define IOP_SIZE(ip)          (*(ip)->li_ops->iop_size)(ip)
#define IOP_FORMAT(ip,vp)     (*(ip)->li_ops->iop_format)(ip, vp)
#define IOP_PIN(ip)           (*(ip)->li_ops->iop_pin)(ip)
#define IOP_UNPIN(ip, flags)  (*(ip)->li_ops->iop_unpin)(ip, flags)
#define IOP_UNPIN_REMOVE(ip,tp) (*(ip)->li_ops->iop_unpin_remove)(ip, tp)
#define IOP_TRYLOCK(ip)       (*(ip)->li_ops->iop_trylock)(ip)
#define IOP_UNLOCK(ip)        (*(ip)->li_ops->iop_unlock)(ip)
#define IOP_COMMITTED(ip, lsn)      (*(ip)->li_ops->iop_committed)(ip, lsn)
#define IOP_PUSH(ip)          (*(ip)->li_ops->iop_push)(ip)
#define IOP_PUSHBUF(ip)       (*(ip)->li_ops->iop_pushbuf)(ip)
#define IOP_COMMITTING(ip, lsn) (*(ip)->li_ops->iop_committing)(ip, lsn)

/*
 * Return values for the IOP_TRYLOCK() routines.
 */
#define     XFS_ITEM_SUCCESS  0
#define     XFS_ITEM_PINNED         1
#define     XFS_ITEM_LOCKED         2
#define     XFS_ITEM_FLUSHING 3
#define XFS_ITEM_PUSHBUF      4

#endif      /* __KERNEL__ */

/*
 * This structure is used to track log items associated with
 * a transaction.  It points to the log item and keeps some
 * flags to track the state of the log item.  It also tracks
 * the amount of space needed to log the item it describes
 * once we get to commit processing (see xfs_trans_commit()).
 */
typedef struct xfs_log_item_desc {
      xfs_log_item_t    *lid_item;
      ushort            lid_size;
      unsigned char     lid_flags;
      unsigned char     lid_index;
} xfs_log_item_desc_t;

#define XFS_LID_DIRTY         0x1
#define XFS_LID_PINNED        0x2
#define XFS_LID_BUF_STALE     0x8

/*
 * This structure is used to maintain a chunk list of log_item_desc
 * structures. The free field is a bitmask indicating which descriptors
 * in this chunk's array are free.  The unused field is the first value
 * not used since this chunk was allocated.
 */
#define     XFS_LIC_NUM_SLOTS 15
typedef struct xfs_log_item_chunk {
      struct xfs_log_item_chunk     *lic_next;
      ushort                        lic_free;
      ushort                        lic_unused;
      xfs_log_item_desc_t           lic_descs[XFS_LIC_NUM_SLOTS];
} xfs_log_item_chunk_t;

#define     XFS_LIC_MAX_SLOT  (XFS_LIC_NUM_SLOTS - 1)
#define     XFS_LIC_FREEMASK  ((1 << XFS_LIC_NUM_SLOTS) - 1)


/*
 * Initialize the given chunk.  Set the chunk's free descriptor mask
 * to indicate that all descriptors are free.  The caller gets to set
 * lic_unused to the right value (0 matches all free).  The
 * lic_descs.lid_index values are set up as each desc is allocated.
 */
#define     XFS_LIC_INIT(cp)  xfs_lic_init(cp)
static inline void xfs_lic_init(xfs_log_item_chunk_t *cp)
{
      cp->lic_free = XFS_LIC_FREEMASK;
}

#define     XFS_LIC_INIT_SLOT(cp,slot)    xfs_lic_init_slot(cp, slot)
static inline void xfs_lic_init_slot(xfs_log_item_chunk_t *cp, int slot)
{
      cp->lic_descs[slot].lid_index = (unsigned char)(slot);
}

#define     XFS_LIC_VACANCY(cp)           xfs_lic_vacancy(cp)
static inline int xfs_lic_vacancy(xfs_log_item_chunk_t *cp)
{
      return cp->lic_free & XFS_LIC_FREEMASK;
}

#define     XFS_LIC_ALL_FREE(cp)          xfs_lic_all_free(cp)
static inline void xfs_lic_all_free(xfs_log_item_chunk_t *cp)
{
      cp->lic_free = XFS_LIC_FREEMASK;
}

#define     XFS_LIC_ARE_ALL_FREE(cp)      xfs_lic_are_all_free(cp)
static inline int xfs_lic_are_all_free(xfs_log_item_chunk_t *cp)
{
      return ((cp->lic_free & XFS_LIC_FREEMASK) == XFS_LIC_FREEMASK);
}

#define     XFS_LIC_ISFREE(cp,slot) xfs_lic_isfree(cp,slot)
static inline int xfs_lic_isfree(xfs_log_item_chunk_t *cp, int slot)
{
      return (cp->lic_free & (1 << slot));
}

#define     XFS_LIC_CLAIM(cp,slot)        xfs_lic_claim(cp,slot)
static inline void xfs_lic_claim(xfs_log_item_chunk_t *cp, int slot)
{
      cp->lic_free &= ~(1 << slot);
}

#define     XFS_LIC_RELSE(cp,slot)        xfs_lic_relse(cp,slot)
static inline void xfs_lic_relse(xfs_log_item_chunk_t *cp, int slot)
{
      cp->lic_free |= 1 << slot;
}

#define     XFS_LIC_SLOT(cp,slot)         xfs_lic_slot(cp,slot)
static inline xfs_log_item_desc_t *
xfs_lic_slot(xfs_log_item_chunk_t *cp, int slot)
{
      return &(cp->lic_descs[slot]);
}

#define     XFS_LIC_DESC_TO_SLOT(dp)      xfs_lic_desc_to_slot(dp)
static inline int xfs_lic_desc_to_slot(xfs_log_item_desc_t *dp)
{
      return (uint)dp->lid_index;
}

/*
 * Calculate the address of a chunk given a descriptor pointer:
 * dp - dp->lid_index give the address of the start of the lic_descs array.
 * From this we subtract the offset of the lic_descs field in a chunk.
 * All of this yields the address of the chunk, which is
 * cast to a chunk pointer.
 */
#define     XFS_LIC_DESC_TO_CHUNK(dp)     xfs_lic_desc_to_chunk(dp)
static inline xfs_log_item_chunk_t *
xfs_lic_desc_to_chunk(xfs_log_item_desc_t *dp)
{
      return (xfs_log_item_chunk_t*) \
            (((xfs_caddr_t)((dp) - (dp)->lid_index)) - \
            (xfs_caddr_t)(((xfs_log_item_chunk_t*)0)->lic_descs));
}

#ifdef __KERNEL__
/*
 * This structure is used to maintain a list of block ranges that have been
 * freed in the transaction.  The ranges are listed in the perag[] busy list
 * between when they're freed and the transaction is committed to disk.
 */

typedef struct xfs_log_busy_slot {
      xfs_agnumber_t          lbc_ag;
      ushort                  lbc_idx;    /* index in perag.busy[] */
} xfs_log_busy_slot_t;

#define XFS_LBC_NUM_SLOTS     31
typedef struct xfs_log_busy_chunk {
      struct xfs_log_busy_chunk     *lbc_next;
      uint                    lbc_free;   /* free slots bitmask */
      ushort                        lbc_unused; /* first unused */
      xfs_log_busy_slot_t           lbc_busy[XFS_LBC_NUM_SLOTS];
} xfs_log_busy_chunk_t;

#define     XFS_LBC_MAX_SLOT  (XFS_LBC_NUM_SLOTS - 1)
#define     XFS_LBC_FREEMASK  ((1U << XFS_LBC_NUM_SLOTS) - 1)

#define     XFS_LBC_INIT(cp)  ((cp)->lbc_free = XFS_LBC_FREEMASK)
#define     XFS_LBC_CLAIM(cp, slot) ((cp)->lbc_free &= ~(1 << (slot)))
#define     XFS_LBC_SLOT(cp, slot)  (&((cp)->lbc_busy[(slot)]))
#define     XFS_LBC_VACANCY(cp)     (((cp)->lbc_free) & XFS_LBC_FREEMASK)
#define     XFS_LBC_ISFREE(cp, slot) ((cp)->lbc_free & (1 << (slot)))

/*
 * This is the type of function which can be given to xfs_trans_callback()
 * to be called upon the transaction's commit to disk.
 */
typedef void (*xfs_trans_callback_t)(struct xfs_trans *, void *);

/*
 * This is the structure maintained for every active transaction.
 */
typedef struct xfs_trans {
      unsigned int            t_magic;    /* magic number */
      xfs_log_callback_t      t_logcb;    /* log callback struct */
      unsigned int            t_type;           /* transaction type */
      unsigned int            t_log_res;  /* amt of log space resvd */
      unsigned int            t_log_count;      /* count for perm log res */
      unsigned int            t_blk_res;  /* # of blocks resvd */
      unsigned int            t_blk_res_used;   /* # of resvd blocks used */
      unsigned int            t_rtx_res;  /* # of rt extents resvd */
      unsigned int            t_rtx_res_used;   /* # of resvd rt extents used */
      xfs_log_ticket_t  t_ticket;   /* log mgr ticket */
      sema_t                  t_sema;           /* sema for commit completion */
      xfs_lsn_t         t_lsn;            /* log seq num of start of
                                     * transaction. */
      xfs_lsn_t         t_commit_lsn;     /* log seq num of end of
                                     * transaction. */
      struct xfs_mount  *t_mountp;  /* ptr to fs mount struct */
      struct xfs_dquot_acct   *t_dqinfo;  /* acctg info for dquots */
      xfs_trans_callback_t    t_callback; /* transaction callback */
      void              *t_callarg; /* callback arg */
      unsigned int            t_flags;    /* misc flags */
      int64_t                 t_icount_delta;   /* superblock icount change */
      int64_t                 t_ifree_delta;    /* superblock ifree change */
      int64_t                 t_fdblocks_delta; /* superblock fdblocks chg */
      int64_t                 t_res_fdblocks_delta; /* on-disk only chg */
      int64_t                 t_frextents_delta;/* superblock freextents chg*/
      int64_t                 t_res_frextents_delta; /* on-disk only chg */
#ifdef DEBUG
      int64_t                 t_ag_freeblks_delta; /* debugging counter */
      int64_t                 t_ag_flist_delta; /* debugging counter */
      int64_t                 t_ag_btree_delta; /* debugging counter */
#endif
      int64_t                 t_dblocks_delta;/* superblock dblocks change */
      int64_t                 t_agcount_delta;/* superblock agcount change */
      int64_t                 t_imaxpct_delta;/* superblock imaxpct change */
      int64_t                 t_rextsize_delta;/* superblock rextsize chg */
      int64_t                 t_rbmblocks_delta;/* superblock rbmblocks chg */
      int64_t                 t_rblocks_delta;/* superblock rblocks change */
      int64_t                 t_rextents_delta;/* superblocks rextents chg */
      int64_t                 t_rextslog_delta;/* superblocks rextslog chg */
      unsigned int            t_items_free;     /* log item descs free */
      xfs_log_item_chunk_t    t_items;    /* first log item desc chunk */
      xfs_trans_header_t      t_header;   /* header for in-log trans */
      unsigned int            t_busy_free;      /* busy descs free */
      xfs_log_busy_chunk_t    t_busy;           /* busy/async free blocks */
      unsigned long           t_pflags;   /* saved process flags state */
} xfs_trans_t;

#endif      /* __KERNEL__ */


#define     XFS_TRANS_MAGIC         0x5452414E  /* 'TRAN' */
/*
 * Values for t_flags.
 */
#define     XFS_TRANS_DIRTY         0x01  /* something needs to be logged */
#define     XFS_TRANS_SB_DIRTY      0x02  /* superblock is modified */
#define     XFS_TRANS_PERM_LOG_RES  0x04  /* xact took a permanent log res */
#define     XFS_TRANS_SYNC          0x08  /* make commit synchronous */
#define XFS_TRANS_DQ_DIRTY    0x10  /* at least one dquot in trx dirty */
#define XFS_TRANS_RESERVE     0x20    /* OK to use reserved data blocks */

/*
 * Values for call flags parameter.
 */
#define     XFS_TRANS_NOSLEEP       0x1
#define     XFS_TRANS_WAIT                0x2
#define     XFS_TRANS_RELEASE_LOG_RES     0x4
#define     XFS_TRANS_ABORT               0x8

/*
 * Field values for xfs_trans_mod_sb.
 */
#define     XFS_TRANS_SB_ICOUNT           0x00000001
#define     XFS_TRANS_SB_IFREE            0x00000002
#define     XFS_TRANS_SB_FDBLOCKS         0x00000004
#define     XFS_TRANS_SB_RES_FDBLOCKS     0x00000008
#define     XFS_TRANS_SB_FREXTENTS        0x00000010
#define     XFS_TRANS_SB_RES_FREXTENTS    0x00000020
#define     XFS_TRANS_SB_DBLOCKS          0x00000040
#define     XFS_TRANS_SB_AGCOUNT          0x00000080
#define     XFS_TRANS_SB_IMAXPCT          0x00000100
#define     XFS_TRANS_SB_REXTSIZE         0x00000200
#define     XFS_TRANS_SB_RBMBLOCKS        0x00000400
#define     XFS_TRANS_SB_RBLOCKS          0x00000800
#define     XFS_TRANS_SB_REXTENTS         0x00001000
#define     XFS_TRANS_SB_REXTSLOG         0x00002000


/*
 * Various log reservation values.
 * These are based on the size of the file system block
 * because that is what most transactions manipulate.
 * Each adds in an additional 128 bytes per item logged to
 * try to account for the overhead of the transaction mechanism.
 *
 * Note:
 * Most of the reservations underestimate the number of allocation
 * groups into which they could free extents in the xfs_bmap_finish()
 * call.  This is because the number in the worst case is quite high
 * and quite unusual.  In order to fix this we need to change
 * xfs_bmap_finish() to free extents in only a single AG at a time.
 * This will require changes to the EFI code as well, however, so that
 * the EFI for the extents not freed is logged again in each transaction.
 * See bug 261917.
 */

/*
 * Per-extent log reservation for the allocation btree changes
 * involved in freeing or allocating an extent.
 * 2 trees * (2 blocks/level * max depth - 1) * block size
 */
#define     XFS_ALLOCFREE_LOG_RES(mp,nx) \
      ((nx) * (2 * XFS_FSB_TO_B((mp), 2 * XFS_AG_MAXLEVELS(mp) - 1)))
#define     XFS_ALLOCFREE_LOG_COUNT(mp,nx) \
      ((nx) * (2 * (2 * XFS_AG_MAXLEVELS(mp) - 1)))

/*
 * Per-directory log reservation for any directory change.
 * dir blocks: (1 btree block per level + data block + free block) * dblock size
 * bmap btree: (levels + 2) * max depth * block size
 * v2 directory blocks can be fragmented below the dirblksize down to the fsb
 * size, so account for that in the DAENTER macros.
 */
#define     XFS_DIROP_LOG_RES(mp)   \
      (XFS_FSB_TO_B(mp, XFS_DAENTER_BLOCKS(mp, XFS_DATA_FORK)) + \
       (XFS_FSB_TO_B(mp, XFS_DAENTER_BMAPS(mp, XFS_DATA_FORK) + 1)))
#define     XFS_DIROP_LOG_COUNT(mp) \
      (XFS_DAENTER_BLOCKS(mp, XFS_DATA_FORK) + \
       XFS_DAENTER_BMAPS(mp, XFS_DATA_FORK) + 1)

/*
 * In a write transaction we can allocate a maximum of 2
 * extents.  This gives:
 *    the inode getting the new extents: inode size
 *    the inode\'s bmap btree: max depth * block size
 *    the agfs of the ags from which the extents are allocated: 2 * sector
 *    the superblock free block counter: sector size
 *    the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size
 * And the bmap_finish transaction can free bmap blocks in a join:
 *    the agfs of the ags containing the blocks: 2 * sector size
 *    the agfls of the ags containing the blocks: 2 * sector size
 *    the super block free block counter: sector size
 *    the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size
 */
#define XFS_CALC_WRITE_LOG_RES(mp) \
      (MAX( \
       ((mp)->m_sb.sb_inodesize + \
        XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK)) + \
        (2 * (mp)->m_sb.sb_sectsize) + \
        (mp)->m_sb.sb_sectsize + \
        XFS_ALLOCFREE_LOG_RES(mp, 2) + \
        (128 * (4 + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) + XFS_ALLOCFREE_LOG_COUNT(mp, 2)))),\
       ((2 * (mp)->m_sb.sb_sectsize) + \
        (2 * (mp)->m_sb.sb_sectsize) + \
        (mp)->m_sb.sb_sectsize + \
        XFS_ALLOCFREE_LOG_RES(mp, 2) + \
        (128 * (5 + XFS_ALLOCFREE_LOG_COUNT(mp, 2))))))

#define     XFS_WRITE_LOG_RES(mp)   ((mp)->m_reservations.tr_write)

/*
 * In truncating a file we free up to two extents at once.  We can modify:
 *    the inode being truncated: inode size
 *    the inode\'s bmap btree: (max depth + 1) * block size
 * And the bmap_finish transaction can free the blocks and bmap blocks:
 *    the agf for each of the ags: 4 * sector size
 *    the agfl for each of the ags: 4 * sector size
 *    the super block to reflect the freed blocks: sector size
 *    worst case split in allocation btrees per extent assuming 4 extents:
 *          4 exts * 2 trees * (2 * max depth - 1) * block size
 *    the inode btree: max depth * blocksize
 *    the allocation btrees: 2 trees * (max depth - 1) * block size
 */
#define     XFS_CALC_ITRUNCATE_LOG_RES(mp) \
      (MAX( \
       ((mp)->m_sb.sb_inodesize + \
        XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) + 1) + \
        (128 * (2 + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK)))), \
       ((4 * (mp)->m_sb.sb_sectsize) + \
        (4 * (mp)->m_sb.sb_sectsize) + \
        (mp)->m_sb.sb_sectsize + \
        XFS_ALLOCFREE_LOG_RES(mp, 4) + \
        (128 * (9 + XFS_ALLOCFREE_LOG_COUNT(mp, 4))) + \
        (128 * 5) + \
        XFS_ALLOCFREE_LOG_RES(mp, 1) + \
         (128 * (2 + XFS_IALLOC_BLOCKS(mp) + XFS_IN_MAXLEVELS(mp) + \
          XFS_ALLOCFREE_LOG_COUNT(mp, 1))))))

#define     XFS_ITRUNCATE_LOG_RES(mp)   ((mp)->m_reservations.tr_itruncate)

/*
 * In renaming a files we can modify:
 *    the four inodes involved: 4 * inode size
 *    the two directory btrees: 2 * (max depth + v2) * dir block size
 *    the two directory bmap btrees: 2 * max depth * block size
 * And the bmap_finish transaction can free dir and bmap blocks (two sets
 *    of bmap blocks) giving:
 *    the agf for the ags in which the blocks live: 3 * sector size
 *    the agfl for the ags in which the blocks live: 3 * sector size
 *    the superblock for the free block count: sector size
 *    the allocation btrees: 3 exts * 2 trees * (2 * max depth - 1) * block size
 */
#define     XFS_CALC_RENAME_LOG_RES(mp) \
      (MAX( \
       ((4 * (mp)->m_sb.sb_inodesize) + \
        (2 * XFS_DIROP_LOG_RES(mp)) + \
        (128 * (4 + 2 * XFS_DIROP_LOG_COUNT(mp)))), \
       ((3 * (mp)->m_sb.sb_sectsize) + \
        (3 * (mp)->m_sb.sb_sectsize) + \
        (mp)->m_sb.sb_sectsize + \
        XFS_ALLOCFREE_LOG_RES(mp, 3) + \
        (128 * (7 + XFS_ALLOCFREE_LOG_COUNT(mp, 3))))))

#define     XFS_RENAME_LOG_RES(mp)  ((mp)->m_reservations.tr_rename)

/*
 * For creating a link to an inode:
 *    the parent directory inode: inode size
 *    the linked inode: inode size
 *    the directory btree could split: (max depth + v2) * dir block size
 *    the directory bmap btree could join or split: (max depth + v2) * blocksize
 * And the bmap_finish transaction can free some bmap blocks giving:
 *    the agf for the ag in which the blocks live: sector size
 *    the agfl for the ag in which the blocks live: sector size
 *    the superblock for the free block count: sector size
 *    the allocation btrees: 2 trees * (2 * max depth - 1) * block size
 */
#define     XFS_CALC_LINK_LOG_RES(mp) \
      (MAX( \
       ((mp)->m_sb.sb_inodesize + \
        (mp)->m_sb.sb_inodesize + \
        XFS_DIROP_LOG_RES(mp) + \
        (128 * (2 + XFS_DIROP_LOG_COUNT(mp)))), \
       ((mp)->m_sb.sb_sectsize + \
        (mp)->m_sb.sb_sectsize + \
        (mp)->m_sb.sb_sectsize + \
        XFS_ALLOCFREE_LOG_RES(mp, 1) + \
        (128 * (3 + XFS_ALLOCFREE_LOG_COUNT(mp, 1))))))

#define     XFS_LINK_LOG_RES(mp)    ((mp)->m_reservations.tr_link)

/*
 * For removing a directory entry we can modify:
 *    the parent directory inode: inode size
 *    the removed inode: inode size
 *    the directory btree could join: (max depth + v2) * dir block size
 *    the directory bmap btree could join or split: (max depth + v2) * blocksize
 * And the bmap_finish transaction can free the dir and bmap blocks giving:
 *    the agf for the ag in which the blocks live: 2 * sector size
 *    the agfl for the ag in which the blocks live: 2 * sector size
 *    the superblock for the free block count: sector size
 *    the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size
 */
#define     XFS_CALC_REMOVE_LOG_RES(mp)   \
      (MAX( \
       ((mp)->m_sb.sb_inodesize + \
        (mp)->m_sb.sb_inodesize + \
        XFS_DIROP_LOG_RES(mp) + \
        (128 * (2 + XFS_DIROP_LOG_COUNT(mp)))), \
       ((2 * (mp)->m_sb.sb_sectsize) + \
        (2 * (mp)->m_sb.sb_sectsize) + \
        (mp)->m_sb.sb_sectsize + \
        XFS_ALLOCFREE_LOG_RES(mp, 2) + \
        (128 * (5 + XFS_ALLOCFREE_LOG_COUNT(mp, 2))))))

#define     XFS_REMOVE_LOG_RES(mp)  ((mp)->m_reservations.tr_remove)

/*
 * For symlink we can modify:
 *    the parent directory inode: inode size
 *    the new inode: inode size
 *    the inode btree entry: 1 block
 *    the directory btree: (max depth + v2) * dir block size
 *    the directory inode\'s bmap btree: (max depth + v2) * block size
 *    the blocks for the symlink: 1 KB
 * Or in the first xact we allocate some inodes giving:
 *    the agi and agf of the ag getting the new inodes: 2 * sectorsize
 *    the inode blocks allocated: XFS_IALLOC_BLOCKS * blocksize
 *    the inode btree: max depth * blocksize
 *    the allocation btrees: 2 trees * (2 * max depth - 1) * block size
 */
#define     XFS_CALC_SYMLINK_LOG_RES(mp)        \
      (MAX( \
       ((mp)->m_sb.sb_inodesize + \
        (mp)->m_sb.sb_inodesize + \
        XFS_FSB_TO_B(mp, 1) + \
        XFS_DIROP_LOG_RES(mp) + \
        1024 + \
        (128 * (4 + XFS_DIROP_LOG_COUNT(mp)))), \
       (2 * (mp)->m_sb.sb_sectsize + \
        XFS_FSB_TO_B((mp), XFS_IALLOC_BLOCKS((mp))) + \
        XFS_FSB_TO_B((mp), XFS_IN_MAXLEVELS(mp)) + \
        XFS_ALLOCFREE_LOG_RES(mp, 1) + \
        (128 * (2 + XFS_IALLOC_BLOCKS(mp) + XFS_IN_MAXLEVELS(mp) + \
         XFS_ALLOCFREE_LOG_COUNT(mp, 1))))))

#define     XFS_SYMLINK_LOG_RES(mp) ((mp)->m_reservations.tr_symlink)

/*
 * For create we can modify:
 *    the parent directory inode: inode size
 *    the new inode: inode size
 *    the inode btree entry: block size
 *    the superblock for the nlink flag: sector size
 *    the directory btree: (max depth + v2) * dir block size
 *    the directory inode\'s bmap btree: (max depth + v2) * block size
 * Or in the first xact we allocate some inodes giving:
 *    the agi and agf of the ag getting the new inodes: 2 * sectorsize
 *    the superblock for the nlink flag: sector size
 *    the inode blocks allocated: XFS_IALLOC_BLOCKS * blocksize
 *    the inode btree: max depth * blocksize
 *    the allocation btrees: 2 trees * (max depth - 1) * block size
 */
#define     XFS_CALC_CREATE_LOG_RES(mp)         \
      (MAX( \
       ((mp)->m_sb.sb_inodesize + \
        (mp)->m_sb.sb_inodesize + \
        (mp)->m_sb.sb_sectsize + \
        XFS_FSB_TO_B(mp, 1) + \
        XFS_DIROP_LOG_RES(mp) + \
        (128 * (3 + XFS_DIROP_LOG_COUNT(mp)))), \
       (3 * (mp)->m_sb.sb_sectsize + \
        XFS_FSB_TO_B((mp), XFS_IALLOC_BLOCKS((mp))) + \
        XFS_FSB_TO_B((mp), XFS_IN_MAXLEVELS(mp)) + \
        XFS_ALLOCFREE_LOG_RES(mp, 1) + \
        (128 * (2 + XFS_IALLOC_BLOCKS(mp) + XFS_IN_MAXLEVELS(mp) + \
         XFS_ALLOCFREE_LOG_COUNT(mp, 1))))))

#define     XFS_CREATE_LOG_RES(mp)  ((mp)->m_reservations.tr_create)

/*
 * Making a new directory is the same as creating a new file.
 */
#define     XFS_CALC_MKDIR_LOG_RES(mp)    XFS_CALC_CREATE_LOG_RES(mp)

#define     XFS_MKDIR_LOG_RES(mp)   ((mp)->m_reservations.tr_mkdir)

/*
 * In freeing an inode we can modify:
 *    the inode being freed: inode size
 *    the super block free inode counter: sector size
 *    the agi hash list and counters: sector size
 *    the inode btree entry: block size
 *    the on disk inode before ours in the agi hash list: inode cluster size
 *    the inode btree: max depth * blocksize
 *    the allocation btrees: 2 trees * (max depth - 1) * block size
 */
#define     XFS_CALC_IFREE_LOG_RES(mp) \
      ((mp)->m_sb.sb_inodesize + \
       (mp)->m_sb.sb_sectsize + \
       (mp)->m_sb.sb_sectsize + \
       XFS_FSB_TO_B((mp), 1) + \
       MAX((__uint16_t)XFS_FSB_TO_B((mp), 1), XFS_INODE_CLUSTER_SIZE(mp)) + \
       (128 * 5) + \
        XFS_ALLOCFREE_LOG_RES(mp, 1) + \
        (128 * (2 + XFS_IALLOC_BLOCKS(mp) + XFS_IN_MAXLEVELS(mp) + \
         XFS_ALLOCFREE_LOG_COUNT(mp, 1))))


#define     XFS_IFREE_LOG_RES(mp)   ((mp)->m_reservations.tr_ifree)

/*
 * When only changing the inode we log the inode and possibly the superblock
 * We also add a bit of slop for the transaction stuff.
 */
#define     XFS_CALC_ICHANGE_LOG_RES(mp)  ((mp)->m_sb.sb_inodesize + \
                               (mp)->m_sb.sb_sectsize + 512)

#define     XFS_ICHANGE_LOG_RES(mp) ((mp)->m_reservations.tr_ichange)

/*
 * Growing the data section of the filesystem.
 *    superblock
 *    agi and agf
 *    allocation btrees
 */
#define     XFS_CALC_GROWDATA_LOG_RES(mp) \
      ((mp)->m_sb.sb_sectsize * 3 + \
       XFS_ALLOCFREE_LOG_RES(mp, 1) + \
       (128 * (3 + XFS_ALLOCFREE_LOG_COUNT(mp, 1))))

#define     XFS_GROWDATA_LOG_RES(mp)    ((mp)->m_reservations.tr_growdata)

/*
 * Growing the rt section of the filesystem.
 * In the first set of transactions (ALLOC) we allocate space to the
 * bitmap or summary files.
 *    superblock: sector size
 *    agf of the ag from which the extent is allocated: sector size
 *    bmap btree for bitmap/summary inode: max depth * blocksize
 *    bitmap/summary inode: inode size
 *    allocation btrees for 1 block alloc: 2 * (2 * maxdepth - 1) * blocksize
 */
#define     XFS_CALC_GROWRTALLOC_LOG_RES(mp) \
      (2 * (mp)->m_sb.sb_sectsize + \
       XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK)) + \
       (mp)->m_sb.sb_inodesize + \
       XFS_ALLOCFREE_LOG_RES(mp, 1) + \
       (128 * \
        (3 + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) + \
         XFS_ALLOCFREE_LOG_COUNT(mp, 1))))

#define     XFS_GROWRTALLOC_LOG_RES(mp)   ((mp)->m_reservations.tr_growrtalloc)

/*
 * Growing the rt section of the filesystem.
 * In the second set of transactions (ZERO) we zero the new metadata blocks.
 *    one bitmap/summary block: blocksize
 */
#define     XFS_CALC_GROWRTZERO_LOG_RES(mp) \
      ((mp)->m_sb.sb_blocksize + 128)

#define     XFS_GROWRTZERO_LOG_RES(mp)    ((mp)->m_reservations.tr_growrtzero)

/*
 * Growing the rt section of the filesystem.
 * In the third set of transactions (FREE) we update metadata without
 * allocating any new blocks.
 *    superblock: sector size
 *    bitmap inode: inode size
 *    summary inode: inode size
 *    one bitmap block: blocksize
 *    summary blocks: new summary size
 */
#define     XFS_CALC_GROWRTFREE_LOG_RES(mp) \
      ((mp)->m_sb.sb_sectsize + \
       2 * (mp)->m_sb.sb_inodesize + \
       (mp)->m_sb.sb_blocksize + \
       (mp)->m_rsumsize + \
       (128 * 5))

#define     XFS_GROWRTFREE_LOG_RES(mp)    ((mp)->m_reservations.tr_growrtfree)

/*
 * Logging the inode modification timestamp on a synchronous write.
 *    inode
 */
#define     XFS_CALC_SWRITE_LOG_RES(mp) \
      ((mp)->m_sb.sb_inodesize + 128)

#define     XFS_SWRITE_LOG_RES(mp)  ((mp)->m_reservations.tr_swrite)

/*
 * Logging the inode timestamps on an fsync -- same as SWRITE
 * as long as SWRITE logs the entire inode core
 */
#define XFS_FSYNC_TS_LOG_RES(mp)        ((mp)->m_reservations.tr_swrite)

/*
 * Logging the inode mode bits when writing a setuid/setgid file
 *    inode
 */
#define     XFS_CALC_WRITEID_LOG_RES(mp) \
      ((mp)->m_sb.sb_inodesize + 128)

#define     XFS_WRITEID_LOG_RES(mp) ((mp)->m_reservations.tr_swrite)

/*
 * Converting the inode from non-attributed to attributed.
 *    the inode being converted: inode size
 *    agf block and superblock (for block allocation)
 *    the new block (directory sized)
 *    bmap blocks for the new directory block
 *    allocation btrees
 */
#define     XFS_CALC_ADDAFORK_LOG_RES(mp) \
      ((mp)->m_sb.sb_inodesize + \
       (mp)->m_sb.sb_sectsize * 2 + \
       (mp)->m_dirblksize + \
       XFS_FSB_TO_B(mp, (XFS_DAENTER_BMAP1B(mp, XFS_DATA_FORK) + 1)) + \
       XFS_ALLOCFREE_LOG_RES(mp, 1) + \
       (128 * (4 + (XFS_DAENTER_BMAP1B(mp, XFS_DATA_FORK) + 1) + \
             XFS_ALLOCFREE_LOG_COUNT(mp, 1))))

#define     XFS_ADDAFORK_LOG_RES(mp)      ((mp)->m_reservations.tr_addafork)

/*
 * Removing the attribute fork of a file
 *    the inode being truncated: inode size
 *    the inode\'s bmap btree: max depth * block size
 * And the bmap_finish transaction can free the blocks and bmap blocks:
 *    the agf for each of the ags: 4 * sector size
 *    the agfl for each of the ags: 4 * sector size
 *    the super block to reflect the freed blocks: sector size
 *    worst case split in allocation btrees per extent assuming 4 extents:
 *          4 exts * 2 trees * (2 * max depth - 1) * block size
 */
#define     XFS_CALC_ATTRINVAL_LOG_RES(mp)      \
      (MAX( \
       ((mp)->m_sb.sb_inodesize + \
        XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK)) + \
        (128 * (1 + XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK)))), \
       ((4 * (mp)->m_sb.sb_sectsize) + \
        (4 * (mp)->m_sb.sb_sectsize) + \
        (mp)->m_sb.sb_sectsize + \
        XFS_ALLOCFREE_LOG_RES(mp, 4) + \
        (128 * (9 + XFS_ALLOCFREE_LOG_COUNT(mp, 4))))))

#define     XFS_ATTRINVAL_LOG_RES(mp)     ((mp)->m_reservations.tr_attrinval)

/*
 * Setting an attribute.
 *    the inode getting the attribute
 *    the superblock for allocations
 *    the agfs extents are allocated from
 *    the attribute btree * max depth
 *    the inode allocation btree
 * Since attribute transaction space is dependent on the size of the attribute,
 * the calculation is done partially at mount time and partially at runtime.
 */
#define     XFS_CALC_ATTRSET_LOG_RES(mp)  \
      ((mp)->m_sb.sb_inodesize + \
       (mp)->m_sb.sb_sectsize + \
        XFS_FSB_TO_B((mp), XFS_DA_NODE_MAXDEPTH) + \
        (128 * (2 + XFS_DA_NODE_MAXDEPTH)))

#define     XFS_ATTRSET_LOG_RES(mp, ext)  \
      ((mp)->m_reservations.tr_attrset + \
       (ext * (mp)->m_sb.sb_sectsize) + \
       (ext * XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK))) + \
       (128 * (ext + (ext * XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK)))))

/*
 * Removing an attribute.
 *    the inode: inode size
 *    the attribute btree could join: max depth * block size
 *    the inode bmap btree could join or split: max depth * block size
 * And the bmap_finish transaction can free the attr blocks freed giving:
 *    the agf for the ag in which the blocks live: 2 * sector size
 *    the agfl for the ag in which the blocks live: 2 * sector size
 *    the superblock for the free block count: sector size
 *    the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size
 */
#define     XFS_CALC_ATTRRM_LOG_RES(mp)   \
      (MAX( \
        ((mp)->m_sb.sb_inodesize + \
        XFS_FSB_TO_B((mp), XFS_DA_NODE_MAXDEPTH) + \
        XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK)) + \
        (128 * (1 + XFS_DA_NODE_MAXDEPTH + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK)))), \
       ((2 * (mp)->m_sb.sb_sectsize) + \
        (2 * (mp)->m_sb.sb_sectsize) + \
        (mp)->m_sb.sb_sectsize + \
        XFS_ALLOCFREE_LOG_RES(mp, 2) + \
        (128 * (5 + XFS_ALLOCFREE_LOG_COUNT(mp, 2))))))

#define     XFS_ATTRRM_LOG_RES(mp)  ((mp)->m_reservations.tr_attrrm)

/*
 * Clearing a bad agino number in an agi hash bucket.
 */
#define     XFS_CALC_CLEAR_AGI_BUCKET_LOG_RES(mp) \
      ((mp)->m_sb.sb_sectsize + 128)

#define     XFS_CLEAR_AGI_BUCKET_LOG_RES(mp)  ((mp)->m_reservations.tr_clearagi)


/*
 * Various log count values.
 */
#define     XFS_DEFAULT_LOG_COUNT         1
#define     XFS_DEFAULT_PERM_LOG_COUNT    2
#define     XFS_ITRUNCATE_LOG_COUNT       2
#define XFS_INACTIVE_LOG_COUNT            2
#define     XFS_CREATE_LOG_COUNT          2
#define     XFS_MKDIR_LOG_COUNT           3
#define     XFS_SYMLINK_LOG_COUNT         3
#define     XFS_REMOVE_LOG_COUNT          2
#define     XFS_LINK_LOG_COUNT            2
#define     XFS_RENAME_LOG_COUNT          2
#define     XFS_WRITE_LOG_COUNT           2
#define     XFS_ADDAFORK_LOG_COUNT        2
#define     XFS_ATTRINVAL_LOG_COUNT       1
#define     XFS_ATTRSET_LOG_COUNT         3
#define     XFS_ATTRRM_LOG_COUNT          3

/*
 * Here we centralize the specification of XFS meta-data buffer
 * reference count values.  This determine how hard the buffer
 * cache tries to hold onto the buffer.
 */
#define     XFS_AGF_REF       4
#define     XFS_AGI_REF       4
#define     XFS_AGFL_REF            3
#define     XFS_INO_BTREE_REF 3
#define     XFS_ALLOC_BTREE_REF     2
#define     XFS_BMAP_BTREE_REF      2
#define     XFS_DIR_BTREE_REF 2
#define     XFS_ATTR_BTREE_REF      1
#define     XFS_INO_REF       1
#define     XFS_DQUOT_REF           1

#ifdef __KERNEL__
/*
 * XFS transaction mechanism exported interfaces that are
 * actually macros.
 */
#define     xfs_trans_get_log_res(tp)     ((tp)->t_log_res)
#define     xfs_trans_get_log_count(tp)   ((tp)->t_log_count)
#define     xfs_trans_get_block_res(tp)   ((tp)->t_blk_res)
#define     xfs_trans_set_sync(tp)        ((tp)->t_flags |= XFS_TRANS_SYNC)

#ifdef DEBUG
#define     xfs_trans_agblocks_delta(tp, d)     ((tp)->t_ag_freeblks_delta += (int64_t)d)
#define     xfs_trans_agflist_delta(tp, d)      ((tp)->t_ag_flist_delta += (int64_t)d)
#define     xfs_trans_agbtree_delta(tp, d)      ((tp)->t_ag_btree_delta += (int64_t)d)
#else
#define     xfs_trans_agblocks_delta(tp, d)
#define     xfs_trans_agflist_delta(tp, d)
#define     xfs_trans_agbtree_delta(tp, d)
#endif

/*
 * XFS transaction mechanism exported interfaces.
 */
void        xfs_trans_init(struct xfs_mount *);
xfs_trans_t *xfs_trans_alloc(struct xfs_mount *, uint);
xfs_trans_t *_xfs_trans_alloc(struct xfs_mount *, uint);
xfs_trans_t *xfs_trans_dup(xfs_trans_t *);
int         xfs_trans_reserve(xfs_trans_t *, uint, uint, uint,
                          uint, uint);
void        xfs_trans_mod_sb(xfs_trans_t *, uint, int64_t);
struct xfs_buf    *xfs_trans_get_buf(xfs_trans_t *, struct xfs_buftarg *, xfs_daddr_t,
                           int, uint);
int         xfs_trans_read_buf(struct xfs_mount *, xfs_trans_t *,
                           struct xfs_buftarg *, xfs_daddr_t, int, uint,
                           struct xfs_buf **);
struct xfs_buf    *xfs_trans_getsb(xfs_trans_t *, struct xfs_mount *, int);

void        xfs_trans_brelse(xfs_trans_t *, struct xfs_buf *);
void        xfs_trans_bjoin(xfs_trans_t *, struct xfs_buf *);
void        xfs_trans_bhold(xfs_trans_t *, struct xfs_buf *);
void        xfs_trans_bhold_release(xfs_trans_t *, struct xfs_buf *);
void        xfs_trans_binval(xfs_trans_t *, struct xfs_buf *);
void        xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *);
void        xfs_trans_stale_inode_buf(xfs_trans_t *, struct xfs_buf *);
void        xfs_trans_dquot_buf(xfs_trans_t *, struct xfs_buf *, uint);
void        xfs_trans_inode_alloc_buf(xfs_trans_t *, struct xfs_buf *);
int         xfs_trans_iget(struct xfs_mount *, xfs_trans_t *,
                         xfs_ino_t , uint, uint, struct xfs_inode **);
void        xfs_trans_ijoin(xfs_trans_t *, struct xfs_inode *, uint);
void        xfs_trans_ihold(xfs_trans_t *, struct xfs_inode *);
void        xfs_trans_log_buf(xfs_trans_t *, struct xfs_buf *, uint, uint);
void        xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint);
struct xfs_efi_log_item *xfs_trans_get_efi(xfs_trans_t *, uint);
void        xfs_efi_release(struct xfs_efi_log_item *, uint);
void        xfs_trans_log_efi_extent(xfs_trans_t *,
                               struct xfs_efi_log_item *,
                               xfs_fsblock_t,
                               xfs_extlen_t);
struct xfs_efd_log_item *xfs_trans_get_efd(xfs_trans_t *,
                          struct xfs_efi_log_item *,
                          uint);
void        xfs_trans_log_efd_extent(xfs_trans_t *,
                               struct xfs_efd_log_item *,
                               xfs_fsblock_t,
                               xfs_extlen_t);
int         _xfs_trans_commit(xfs_trans_t *,
                          uint flags,
                          int *);
#define xfs_trans_commit(tp, flags) _xfs_trans_commit(tp, flags, NULL)
void        xfs_trans_cancel(xfs_trans_t *, int);
void        xfs_trans_ail_init(struct xfs_mount *);
xfs_lsn_t   xfs_trans_push_ail(struct xfs_mount *, xfs_lsn_t);
xfs_lsn_t   xfs_trans_tail_ail(struct xfs_mount *);
void        xfs_trans_unlocked_item(struct xfs_mount *,
                              xfs_log_item_t *);
xfs_log_busy_slot_t *xfs_trans_add_busy(xfs_trans_t *tp,
                              xfs_agnumber_t ag,
                              xfs_extlen_t idx);

#endif      /* __KERNEL__ */

#endif      /* __XFS_TRANS_H__ */

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