fs/xfs/xfs_trans.h

   1 /*
   2  * Copyright (c) 2000-2002,2005 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 #ifndef __XFS_TRANS_H__
  19 #define __XFS_TRANS_H__
  20
  21 /* kernel only transaction subsystem defines */
  22
  23 struct xfs_buf;
  24 struct xfs_buftarg;
  25 struct xfs_efd_log_item;
  26 struct xfs_efi_log_item;
  27 struct xfs_inode;
  28 struct xfs_item_ops;
  29 struct xfs_log_iovec;
  30 struct xfs_log_item_desc;
  31 struct xfs_mount;
  32 struct xfs_trans;
  33 struct xfs_trans_res;
  34 struct xfs_dquot_acct;
  35 struct xfs_busy_extent;
  36 struct xfs_rud_log_item;
  37 struct xfs_rui_log_item;
  38 struct xfs_btree_cur;
  39
  40 typedef struct xfs_log_item {
  41         struct list_head                li_ail;         /* AIL pointers */
  42         xfs_lsn_t                       li_lsn;         /* last on-disk lsn */
  43         struct xfs_log_item_desc        *li_desc;       /* ptr to current desc*/
  44         struct xfs_mount                *li_mountp;     /* ptr to fs mount */
  45         struct xfs_ail                  *li_ailp;       /* ptr to AIL */
  46         uint                            li_type;        /* item type */
  47         uint                            li_flags;       /* misc flags */
  48         struct xfs_log_item             *li_bio_list;   /* buffer item list */
  49         void                            (*li_cb)(struct xfs_buf *,
  50                                                  struct xfs_log_item *);
  51                                                         /* buffer item iodone */
  52                                                         /* callback func */
  53         const struct xfs_item_ops       *li_ops;        /* function list */
  54
  55         /* delayed logging */
  56         struct list_head                li_cil;         /* CIL pointers */
  57         struct xfs_log_vec              *li_lv;         /* active log vector */
  58         struct xfs_log_vec              *li_lv_shadow;  /* standby vector */
  59         xfs_lsn_t                       li_seq;         /* CIL commit seq */
  60 } xfs_log_item_t;
  61
  62 #define XFS_LI_IN_AIL   0x1
  63 #define XFS_LI_ABORTED  0x2
  64
  65 #define XFS_LI_FLAGS \
  66         { XFS_LI_IN_AIL,        "IN_AIL" }, \
  67         { XFS_LI_ABORTED,       "ABORTED" }
  68
  69 struct xfs_item_ops {
  70         void (*iop_size)(xfs_log_item_t *, int *, int *);
  71         void (*iop_format)(xfs_log_item_t *, struct xfs_log_vec *);
  72         void (*iop_pin)(xfs_log_item_t *);
  73         void (*iop_unpin)(xfs_log_item_t *, int remove);
  74         uint (*iop_push)(struct xfs_log_item *, struct list_head *);
  75         void (*iop_unlock)(xfs_log_item_t *);
  76         xfs_lsn_t (*iop_committed)(xfs_log_item_t *, xfs_lsn_t);
  77         void (*iop_committing)(xfs_log_item_t *, xfs_lsn_t);
  78 };
  79
  80 void    xfs_log_item_init(struct xfs_mount *mp, struct xfs_log_item *item,
  81                           int type, const struct xfs_item_ops *ops);
  82
  83 /*
  84  * Return values for the iop_push() routines.
  85  */
  86 #define XFS_ITEM_SUCCESS        0
  87 #define XFS_ITEM_PINNED         1
  88 #define XFS_ITEM_LOCKED         2
  89 #define XFS_ITEM_FLUSHING       3
  90
  91
  92 /*
  93  * This is the structure maintained for every active transaction.
  94  */
  95 typedef struct xfs_trans {
  96         unsigned int            t_magic;        /* magic number */
  97         unsigned int            t_log_res;      /* amt of log space resvd */
  98         unsigned int            t_log_count;    /* count for perm log res */
  99         unsigned int            t_blk_res;      /* # of blocks resvd */
 100         unsigned int            t_blk_res_used; /* # of resvd blocks used */
 101         unsigned int            t_rtx_res;      /* # of rt extents resvd */
 102         unsigned int            t_rtx_res_used; /* # of resvd rt extents used */
 103         struct xlog_ticket      *t_ticket;      /* log mgr ticket */
 104         xfs_lsn_t               t_lsn;          /* log seq num of start of
 105                                                  * transaction. */
 106         xfs_lsn_t               t_commit_lsn;   /* log seq num of end of
 107                                                  * transaction. */
 108         struct xfs_mount        *t_mountp;      /* ptr to fs mount struct */
 109         struct xfs_dquot_acct   *t_dqinfo;      /* acctg info for dquots */
 110         unsigned int            t_flags;        /* misc flags */
 111         int64_t                 t_icount_delta; /* superblock icount change */
 112         int64_t                 t_ifree_delta;  /* superblock ifree change */
 113         int64_t                 t_fdblocks_delta; /* superblock fdblocks chg */
 114         int64_t                 t_res_fdblocks_delta; /* on-disk only chg */
 115         int64_t                 t_frextents_delta;/* superblock freextents chg*/
 116         int64_t                 t_res_frextents_delta; /* on-disk only chg */
 117 #if defined(DEBUG) || defined(XFS_WARN)
 118         int64_t                 t_ag_freeblks_delta; /* debugging counter */
 119         int64_t                 t_ag_flist_delta; /* debugging counter */
 120         int64_t                 t_ag_btree_delta; /* debugging counter */
 121 #endif
 122         int64_t                 t_dblocks_delta;/* superblock dblocks change */
 123         int64_t                 t_agcount_delta;/* superblock agcount change */
 124         int64_t                 t_imaxpct_delta;/* superblock imaxpct change */
 125         int64_t                 t_rextsize_delta;/* superblock rextsize chg */
 126         int64_t                 t_rbmblocks_delta;/* superblock rbmblocks chg */
 127         int64_t                 t_rblocks_delta;/* superblock rblocks change */
 128         int64_t                 t_rextents_delta;/* superblocks rextents chg */
 129         int64_t                 t_rextslog_delta;/* superblocks rextslog chg */
 130         struct list_head        t_items;        /* log item descriptors */
 131         struct list_head        t_busy;         /* list of busy extents */
 132         unsigned long           t_pflags;       /* saved process flags state */
 133 } xfs_trans_t;
 134
 135 /*
 136  * XFS transaction mechanism exported interfaces that are
 137  * actually macros.
 138  */
 139 #define xfs_trans_set_sync(tp)          ((tp)->t_flags |= XFS_TRANS_SYNC)
 140
 141 #if defined(DEBUG) || defined(XFS_WARN)
 142 #define xfs_trans_agblocks_delta(tp, d) ((tp)->t_ag_freeblks_delta += (int64_t)d)
 143 #define xfs_trans_agflist_delta(tp, d)  ((tp)->t_ag_flist_delta += (int64_t)d)
 144 #define xfs_trans_agbtree_delta(tp, d)  ((tp)->t_ag_btree_delta += (int64_t)d)
 145 #else
 146 #define xfs_trans_agblocks_delta(tp, d)
 147 #define xfs_trans_agflist_delta(tp, d)
 148 #define xfs_trans_agbtree_delta(tp, d)
 149 #endif
 150
 151 /*
 152  * XFS transaction mechanism exported interfaces.
 153  */
 154 int             xfs_trans_alloc(struct xfs_mount *mp, struct xfs_trans_res *resp,
 155                         uint blocks, uint rtextents, uint flags,
 156                         struct xfs_trans **tpp);
 157 void            xfs_trans_mod_sb(xfs_trans_t *, uint, int64_t);
 158
 159 struct xfs_buf  *xfs_trans_get_buf_map(struct xfs_trans *tp,
 160                                        struct xfs_buftarg *target,
 161                                        struct xfs_buf_map *map, int nmaps,
 162                                        uint flags);
 163
 164 static inline struct xfs_buf *
 165 xfs_trans_get_buf(
 166         struct xfs_trans        *tp,
 167         struct xfs_buftarg      *target,
 168         xfs_daddr_t             blkno,
 169         int                     numblks,
 170         uint                    flags)
 171 {
 172         DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
 173         return xfs_trans_get_buf_map(tp, target, &map, 1, flags);
 174 }
 175
 176 int             xfs_trans_read_buf_map(struct xfs_mount *mp,
 177                                        struct xfs_trans *tp,
 178                                        struct xfs_buftarg *target,
 179                                        struct xfs_buf_map *map, int nmaps,
 180                                        xfs_buf_flags_t flags,
 181                                        struct xfs_buf **bpp,
 182                                        const struct xfs_buf_ops *ops);
 183
 184 static inline int
 185 xfs_trans_read_buf(
 186         struct xfs_mount        *mp,
 187         struct xfs_trans        *tp,
 188         struct xfs_buftarg      *target,
 189         xfs_daddr_t             blkno,
 190         int                     numblks,
 191         xfs_buf_flags_t         flags,
 192         struct xfs_buf          **bpp,
 193         const struct xfs_buf_ops *ops)
 194 {
 195         DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
 196         return xfs_trans_read_buf_map(mp, tp, target, &map, 1,
 197                                       flags, bpp, ops);
 198 }
 199
 200 struct xfs_buf  *xfs_trans_getsb(xfs_trans_t *, struct xfs_mount *, int);
 201
 202 void            xfs_trans_brelse(xfs_trans_t *, struct xfs_buf *);
 203 void            xfs_trans_bjoin(xfs_trans_t *, struct xfs_buf *);
 204 void            xfs_trans_bhold(xfs_trans_t *, struct xfs_buf *);
 205 void            xfs_trans_bhold_release(xfs_trans_t *, struct xfs_buf *);
 206 void            xfs_trans_binval(xfs_trans_t *, struct xfs_buf *);
 207 void            xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *);
 208 void            xfs_trans_stale_inode_buf(xfs_trans_t *, struct xfs_buf *);
 209 void            xfs_trans_ordered_buf(xfs_trans_t *, struct xfs_buf *);
 210 void            xfs_trans_dquot_buf(xfs_trans_t *, struct xfs_buf *, uint);
 211 void            xfs_trans_inode_alloc_buf(xfs_trans_t *, struct xfs_buf *);
 212 void            xfs_trans_ichgtime(struct xfs_trans *, struct xfs_inode *, int);
 213 void            xfs_trans_ijoin(struct xfs_trans *, struct xfs_inode *, uint);
 214 void            xfs_trans_log_buf(xfs_trans_t *, struct xfs_buf *, uint, uint);
 215 void            xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint);
 216
 217 void            xfs_extent_free_init_defer_op(void);
 218 struct xfs_efd_log_item *xfs_trans_get_efd(struct xfs_trans *,
 219                                   struct xfs_efi_log_item *,
 220                                   uint);
 221 int             xfs_trans_free_extent(struct xfs_trans *,
 222                                       struct xfs_efd_log_item *, xfs_fsblock_t,
 223                                       xfs_extlen_t, struct xfs_owner_info *);
 224 int             xfs_trans_commit(struct xfs_trans *);
 225 int             __xfs_trans_roll(struct xfs_trans **, struct xfs_inode *, int *);
 226 int             xfs_trans_roll(struct xfs_trans **, struct xfs_inode *);
 227 void            xfs_trans_cancel(xfs_trans_t *);
 228 int             xfs_trans_ail_init(struct xfs_mount *);
 229 void            xfs_trans_ail_destroy(struct xfs_mount *);
 230
 231 void            xfs_trans_buf_set_type(struct xfs_trans *, struct xfs_buf *,
 232                                        enum xfs_blft);
 233 void            xfs_trans_buf_copy_type(struct xfs_buf *dst_bp,
 234                                         struct xfs_buf *src_bp);
 235
 236 extern kmem_zone_t      *xfs_trans_zone;
 237 extern kmem_zone_t      *xfs_log_item_desc_zone;
 238
 239 /* rmap updates */
 240 enum xfs_rmap_intent_type;
 241
 242 void xfs_rmap_update_init_defer_op(void);
 243 struct xfs_rud_log_item *xfs_trans_get_rud(struct xfs_trans *tp,
 244                 struct xfs_rui_log_item *ruip);
 245 int xfs_trans_log_finish_rmap_update(struct xfs_trans *tp,
 246                 struct xfs_rud_log_item *rudp, enum xfs_rmap_intent_type type,
 247                 __uint64_t owner, int whichfork, xfs_fileoff_t startoff,
 248                 xfs_fsblock_t startblock, xfs_filblks_t blockcount,
 249                 xfs_exntst_t state, struct xfs_btree_cur **pcur);
 250
 251 #endif  /* __XFS_TRANS_H__ */