include/xfs_trans.h

   1 /*
   2  * Copyright (c) 2000-2005 Silicon Graphics, Inc.
   3  * All Rights Reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it would be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write the Free Software Foundation,
  16  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  */
  18
  19 #ifndef __XFS_TRANS_H__
  20 #define __XFS_TRANS_H__
  21
  22 struct xfs_mount;
  23 struct xfs_buftarg;
  24 struct xfs_buf;
  25 struct xfs_buf_map;
  26
  27 /*
  28  * Userspace Transaction interface
  29  */
  30
  31 typedef struct xfs_log_item {
  32         struct list_head                li_trans;       /* transaction list */
  33         xfs_lsn_t                       li_lsn;         /* last on-disk lsn */
  34         struct xfs_mount                *li_mountp;     /* ptr to fs mount */
  35         uint                            li_type;        /* item type */
  36         unsigned long                   li_flags;       /* misc flags */
  37 } xfs_log_item_t;
  38
  39 #define XFS_LI_DIRTY    3       /* log item dirty in transaction */
  40
  41 typedef struct xfs_inode_log_item {
  42         xfs_log_item_t          ili_item;               /* common portion */
  43         struct xfs_inode        *ili_inode;             /* inode pointer */
  44         unsigned short          ili_flags;              /* misc flags */
  45         unsigned int            ili_fields;             /* fields to be logged */
  46         unsigned int            ili_last_fields;        /* fields when flushed*/
  47 } xfs_inode_log_item_t;
  48
  49 typedef struct xfs_buf_log_item {
  50         xfs_log_item_t          bli_item;       /* common item structure */
  51         struct xfs_buf          *bli_buf;       /* real buffer pointer */
  52         unsigned int            bli_flags;      /* misc flags */
  53         unsigned int            bli_recur;      /* recursion count */
  54         xfs_buf_log_format_t    bli_format;     /* in-log header */
  55 } xfs_buf_log_item_t;
  56
  57 #define XFS_BLI_DIRTY                   (1<<0)
  58 #define XFS_BLI_HOLD                    (1<<1)
  59 #define XFS_BLI_STALE                   (1<<2)
  60 #define XFS_BLI_INODE_ALLOC_BUF         (1<<3)
  61
  62 typedef struct xfs_dq_logitem {
  63         xfs_log_item_t          qli_item;       /* common portion */
  64         struct xfs_dquot        *qli_dquot;     /* dquot ptr */
  65         xfs_lsn_t               qli_flush_lsn;  /* lsn at last flush */
  66         xfs_dq_logformat_t      qli_format;     /* logged structure */
  67 } xfs_dq_logitem_t;
  68
  69 typedef struct xfs_qoff_logitem {
  70         xfs_log_item_t          qql_item;       /* common portion */
  71         struct xfs_qoff_logitem *qql_start_lip; /* qoff-start logitem, if any */
  72         xfs_qoff_logformat_t    qql_format;     /* logged structure */
  73 } xfs_qoff_logitem_t;
  74
  75 typedef struct xfs_trans {
  76         unsigned int    t_type;                 /* transaction type */
  77         unsigned int    t_log_res;              /* amt of log space resvd */
  78         unsigned int    t_log_count;            /* count for perm log res */
  79         unsigned int    t_blk_res;              /* # of blocks resvd */
  80         struct xfs_mount *t_mountp;             /* ptr to fs mount struct */
  81         unsigned int    t_flags;                /* misc flags */
  82         long            t_icount_delta;         /* superblock icount change */
  83         long            t_ifree_delta;          /* superblock ifree change */
  84         long            t_fdblocks_delta;       /* superblock fdblocks chg */
  85         long            t_frextents_delta;      /* superblock freextents chg */
  86         struct list_head        t_items;        /* first log item desc chunk */
  87         struct xfs_defer_ops    *t_agfl_dfops;  /* optional agfl fixup dfops */
  88
  89 } xfs_trans_t;
  90
  91 void    xfs_trans_init(struct xfs_mount *);
  92 int     xfs_trans_roll(struct xfs_trans **);
  93
  94 int     libxfs_trans_alloc(struct xfs_mount *mp, struct xfs_trans_res *resp,
  95                            uint blocks, uint rtextents, uint flags,
  96                            struct xfs_trans **tpp);
  97 int     libxfs_trans_alloc_empty(struct xfs_mount *mp, struct xfs_trans **tpp);
  98 int     libxfs_trans_commit(struct xfs_trans *);
  99 void    libxfs_trans_cancel(struct xfs_trans *);
 100 struct xfs_buf *libxfs_trans_getsb(struct xfs_trans *, struct xfs_mount *, int);
 101
 102 int     libxfs_trans_iget(struct xfs_mount *, struct xfs_trans *, xfs_ino_t,
 103                                 uint, uint, struct xfs_inode **);
 104 void    libxfs_trans_ijoin(struct xfs_trans *, struct xfs_inode *, uint);
 105 void    libxfs_trans_ijoin_ref(struct xfs_trans *, struct xfs_inode *, int);
 106 void    libxfs_trans_log_inode (struct xfs_trans *, struct xfs_inode *,
 107                                 uint);
 108 int     libxfs_trans_roll_inode (struct xfs_trans **, struct xfs_inode *);
 109
 110 void    libxfs_trans_brelse(struct xfs_trans *, struct xfs_buf *);
 111 void    libxfs_trans_binval(struct xfs_trans *, struct xfs_buf *);
 112 void    libxfs_trans_bjoin(struct xfs_trans *, struct xfs_buf *);
 113 void    libxfs_trans_bhold(struct xfs_trans *, struct xfs_buf *);
 114 void    libxfs_trans_dirty_buf(struct xfs_trans *, struct xfs_buf *);
 115 void    libxfs_trans_log_buf(struct xfs_trans *, struct xfs_buf *,
 116                                 uint, uint);
 117 bool    libxfs_trans_ordered_buf(xfs_trans_t *, struct xfs_buf *);
 118
 119 struct xfs_buf  *libxfs_trans_get_buf_map(struct xfs_trans *tp,
 120                                         struct xfs_buftarg *btp,
 121                                         struct xfs_buf_map *map, int nmaps,
 122                                         uint flags);
 123
 124 int     libxfs_trans_read_buf_map(struct xfs_mount *mp, struct xfs_trans *tp,
 125                                   struct xfs_buftarg *btp,
 126                                   struct xfs_buf_map *map, int nmaps,
 127                                   uint flags, struct xfs_buf **bpp,
 128                                   const struct xfs_buf_ops *ops);
 129 static inline struct xfs_buf *
 130 libxfs_trans_get_buf(
 131         struct xfs_trans        *tp,
 132         struct xfs_buftarg      *btp,
 133         xfs_daddr_t             blkno,
 134         int                     numblks,
 135         uint                    flags)
 136 {
 137         DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
 138         return libxfs_trans_get_buf_map(tp, btp, &map, 1, flags);
 139 }
 140
 141 static inline int
 142 libxfs_trans_read_buf(
 143         struct xfs_mount        *mp,
 144         struct xfs_trans        *tp,
 145         struct xfs_buftarg      *btp,
 146         xfs_daddr_t             blkno,
 147         int                     numblks,
 148         uint                    flags,
 149         struct xfs_buf          **bpp,
 150         const struct xfs_buf_ops *ops)
 151 {
 152         DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
 153         return libxfs_trans_read_buf_map(mp, tp, btp, &map, 1, flags, bpp, ops);
 154 }
 155
 156 void xfs_extent_free_init_defer_op(void);
 157 void xfs_rmap_update_init_defer_op(void);
 158 void xfs_refcount_update_init_defer_op(void);
 159 void xfs_bmap_update_init_defer_op(void);
 160
 161 #endif  /* __XFS_TRANS_H__ */