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 xfs_log_item_desc        *li_desc;       /* ptr to current desc*/
  33         struct xfs_mount                *li_mountp;     /* ptr to fs mount */
  34         uint                            li_type;        /* item type */
  35         xfs_lsn_t                       li_lsn;
  36 } xfs_log_item_t;
  37
  38 typedef struct xfs_inode_log_item {
  39         xfs_log_item_t          ili_item;               /* common portion */
  40         struct xfs_inode        *ili_inode;             /* inode pointer */
  41         unsigned short          ili_flags;              /* misc flags */
  42         unsigned int            ili_fields;             /* fields to be logged */
  43         unsigned int            ili_last_fields;        /* fields when flushed*/
  44 } xfs_inode_log_item_t;
  45
  46 typedef struct xfs_buf_log_item {
  47         xfs_log_item_t          bli_item;       /* common item structure */
  48         struct xfs_buf          *bli_buf;       /* real buffer pointer */
  49         unsigned int            bli_flags;      /* misc flags */
  50         unsigned int            bli_recur;      /* recursion count */
  51         xfs_buf_log_format_t    bli_format;     /* in-log header */
  52 } xfs_buf_log_item_t;
  53
  54 #define XFS_BLI_DIRTY                   (1<<0)
  55 #define XFS_BLI_HOLD                    (1<<1)
  56 #define XFS_BLI_STALE                   (1<<2)
  57 #define XFS_BLI_INODE_ALLOC_BUF         (1<<3)
  58
  59 typedef struct xfs_dq_logitem {
  60         xfs_log_item_t          qli_item;       /* common portion */
  61         struct xfs_dquot        *qli_dquot;     /* dquot ptr */
  62         xfs_lsn_t               qli_flush_lsn;  /* lsn at last flush */
  63         xfs_dq_logformat_t      qli_format;     /* logged structure */
  64 } xfs_dq_logitem_t;
  65
  66 typedef struct xfs_qoff_logitem {
  67         xfs_log_item_t          qql_item;       /* common portion */
  68         struct xfs_qoff_logitem *qql_start_lip; /* qoff-start logitem, if any */
  69         xfs_qoff_logformat_t    qql_format;     /* logged structure */
  70 } xfs_qoff_logitem_t;
  71
  72 typedef struct xfs_trans {
  73         unsigned int    t_type;                 /* transaction type */
  74         unsigned int    t_log_res;              /* amt of log space resvd */
  75         unsigned int    t_log_count;            /* count for perm log res */
  76         unsigned int    t_blk_res;              /* # of blocks resvd */
  77         struct xfs_mount *t_mountp;             /* ptr to fs mount struct */
  78         unsigned int    t_flags;                /* misc flags */
  79         long            t_icount_delta;         /* superblock icount change */
  80         long            t_ifree_delta;          /* superblock ifree change */
  81         long            t_fdblocks_delta;       /* superblock fdblocks chg */
  82         long            t_frextents_delta;      /* superblock freextents chg */
  83         struct list_head        t_items;        /* first log item desc chunk */
  84 } xfs_trans_t;
  85
  86 void    xfs_trans_init(struct xfs_mount *);
  87 int     xfs_trans_roll(struct xfs_trans **);
  88
  89 int     libxfs_trans_alloc(struct xfs_mount *mp, struct xfs_trans_res *resp,
  90                            uint blocks, uint rtextents, uint flags,
  91                            struct xfs_trans **tpp);
  92 int     libxfs_trans_alloc_empty(struct xfs_mount *mp, struct xfs_trans **tpp);
  93 int     libxfs_trans_commit(struct xfs_trans *);
  94 void    libxfs_trans_cancel(struct xfs_trans *);
  95 struct xfs_buf *libxfs_trans_getsb(struct xfs_trans *, struct xfs_mount *, int);
  96
  97 int     libxfs_trans_iget(struct xfs_mount *, struct xfs_trans *, xfs_ino_t,
  98                                 uint, uint, struct xfs_inode **);
  99 void    libxfs_trans_ijoin(struct xfs_trans *, struct xfs_inode *, uint);
 100 void    libxfs_trans_ijoin_ref(struct xfs_trans *, struct xfs_inode *, int);
 101 void    libxfs_trans_log_inode (struct xfs_trans *, struct xfs_inode *,
 102                                 uint);
 103 int     libxfs_trans_roll_inode (struct xfs_trans **, struct xfs_inode *);
 104
 105 void    libxfs_trans_brelse(struct xfs_trans *, struct xfs_buf *);
 106 void    libxfs_trans_binval(struct xfs_trans *, struct xfs_buf *);
 107 void    libxfs_trans_bjoin(struct xfs_trans *, struct xfs_buf *);
 108 void    libxfs_trans_bhold(struct xfs_trans *, struct xfs_buf *);
 109 void    libxfs_trans_log_buf(struct xfs_trans *, struct xfs_buf *,
 110                                 uint, uint);
 111 bool    libxfs_trans_ordered_buf(xfs_trans_t *, struct xfs_buf *);
 112
 113 struct xfs_buf  *libxfs_trans_get_buf_map(struct xfs_trans *tp,
 114                                         struct xfs_buftarg *btp,
 115                                         struct xfs_buf_map *map, int nmaps,
 116                                         uint flags);
 117
 118 int     libxfs_trans_read_buf_map(struct xfs_mount *mp, struct xfs_trans *tp,
 119                                   struct xfs_buftarg *btp,
 120                                   struct xfs_buf_map *map, int nmaps,
 121                                   uint flags, struct xfs_buf **bpp,
 122                                   const struct xfs_buf_ops *ops);
 123 static inline struct xfs_buf *
 124 libxfs_trans_get_buf(
 125         struct xfs_trans        *tp,
 126         struct xfs_buftarg      *btp,
 127         xfs_daddr_t             blkno,
 128         int                     numblks,
 129         uint                    flags)
 130 {
 131         DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
 132         return libxfs_trans_get_buf_map(tp, btp, &map, 1, flags);
 133 }
 134
 135 static inline int
 136 libxfs_trans_read_buf(
 137         struct xfs_mount        *mp,
 138         struct xfs_trans        *tp,
 139         struct xfs_buftarg      *btp,
 140         xfs_daddr_t             blkno,
 141         int                     numblks,
 142         uint                    flags,
 143         struct xfs_buf          **bpp,
 144         const struct xfs_buf_ops *ops)
 145 {
 146         DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
 147         return libxfs_trans_read_buf_map(mp, tp, btp, &map, 1, flags, bpp, ops);
 148 }
 149
 150 void xfs_extent_free_init_defer_op(void);
 151 void xfs_rmap_update_init_defer_op(void);
 152 void xfs_refcount_update_init_defer_op(void);
 153 void xfs_bmap_update_init_defer_op(void);
 154
 155 #endif  /* __XFS_TRANS_H__ */