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 struct xfs_cui_log_item;
  40 struct xfs_cud_log_item;
  41 struct xfs_defer_ops;
  42 struct xfs_bui_log_item;
  43 struct xfs_bud_log_item;
  44
  45 typedef struct xfs_log_item {
  46         struct list_head                li_ail;         /* AIL pointers */
  47         xfs_lsn_t                       li_lsn;         /* last on-disk lsn */
  48         struct xfs_log_item_desc        *li_desc;       /* ptr to current desc*/
  49         struct xfs_mount                *li_mountp;     /* ptr to fs mount */
  50         struct xfs_ail                  *li_ailp;       /* ptr to AIL */
  51         uint                            li_type;        /* item type */
  52         uint                            li_flags;       /* misc flags */
  53         struct xfs_buf                  *li_buf;        /* real buffer pointer */
  54         struct xfs_log_item             *li_bio_list;   /* buffer item list */
  55         void                            (*li_cb)(struct xfs_buf *,
  56                                                  struct xfs_log_item *);
  57                                                         /* buffer item iodone */
  58                                                         /* callback func */
  59         const struct xfs_item_ops       *li_ops;        /* function list */
  60
  61         /* delayed logging */
  62         struct list_head                li_cil;         /* CIL pointers */
  63         struct xfs_log_vec              *li_lv;         /* active log vector */
  64         struct xfs_log_vec              *li_lv_shadow;  /* standby vector */
  65         xfs_lsn_t                       li_seq;         /* CIL commit seq */
  66 } xfs_log_item_t;
  67
  68 #define XFS_LI_IN_AIL   0x1
  69 #define XFS_LI_ABORTED  0x2
  70 #define XFS_LI_FAILED   0x4
  71
  72 #define XFS_LI_FLAGS \
  73         { XFS_LI_IN_AIL,        "IN_AIL" }, \
  74         { XFS_LI_ABORTED,       "ABORTED" }, \
  75         { XFS_LI_FAILED,        "FAILED" }
  76
  77 struct xfs_item_ops {
  78         void (*iop_size)(xfs_log_item_t *, int *, int *);
  79         void (*iop_format)(xfs_log_item_t *, struct xfs_log_vec *);
  80         void (*iop_pin)(xfs_log_item_t *);
  81         void (*iop_unpin)(xfs_log_item_t *, int remove);
  82         uint (*iop_push)(struct xfs_log_item *, struct list_head *);
  83         void (*iop_unlock)(xfs_log_item_t *);
  84         xfs_lsn_t (*iop_committed)(xfs_log_item_t *, xfs_lsn_t);
  85         void (*iop_committing)(xfs_log_item_t *, xfs_lsn_t);
  86         void (*iop_error)(xfs_log_item_t *, xfs_buf_t *);
  87 };
  88
  89 void    xfs_log_item_init(struct xfs_mount *mp, struct xfs_log_item *item,
  90                           int type, const struct xfs_item_ops *ops);
  91
  92 /*
  93  * Return values for the iop_push() routines.
  94  */
  95 #define XFS_ITEM_SUCCESS        0
  96 #define XFS_ITEM_PINNED         1
  97 #define XFS_ITEM_LOCKED         2
  98 #define XFS_ITEM_FLUSHING       3
  99
 100
 101 /*
 102  * This is the structure maintained for every active transaction.
 103  */
 104 typedef struct xfs_trans {
 105         unsigned int            t_magic;        /* magic number */
 106         unsigned int            t_log_res;      /* amt of log space resvd */
 107         unsigned int            t_log_count;    /* count for perm log res */
 108         unsigned int            t_blk_res;      /* # of blocks resvd */
 109         unsigned int            t_blk_res_used; /* # of resvd blocks used */
 110         unsigned int            t_rtx_res;      /* # of rt extents resvd */
 111         unsigned int            t_rtx_res_used; /* # of resvd rt extents used */
 112         struct xlog_ticket      *t_ticket;      /* log mgr ticket */
 113         xfs_lsn_t               t_lsn;          /* log seq num of start of
 114                                                  * transaction. */
 115         xfs_lsn_t               t_commit_lsn;   /* log seq num of end of
 116                                                  * transaction. */
 117         struct xfs_mount        *t_mountp;      /* ptr to fs mount struct */
 118         struct xfs_dquot_acct   *t_dqinfo;      /* acctg info for dquots */
 119         unsigned int            t_flags;        /* misc flags */
 120         int64_t                 t_icount_delta; /* superblock icount change */
 121         int64_t                 t_ifree_delta;  /* superblock ifree change */
 122         int64_t                 t_fdblocks_delta; /* superblock fdblocks chg */
 123         int64_t                 t_res_fdblocks_delta; /* on-disk only chg */
 124         int64_t                 t_frextents_delta;/* superblock freextents chg*/
 125         int64_t                 t_res_frextents_delta; /* on-disk only chg */
 126 #if defined(DEBUG) || defined(XFS_WARN)
 127         int64_t                 t_ag_freeblks_delta; /* debugging counter */
 128         int64_t                 t_ag_flist_delta; /* debugging counter */
 129         int64_t                 t_ag_btree_delta; /* debugging counter */
 130 #endif
 131         int64_t                 t_dblocks_delta;/* superblock dblocks change */
 132         int64_t                 t_agcount_delta;/* superblock agcount change */
 133         int64_t                 t_imaxpct_delta;/* superblock imaxpct change */
 134         int64_t                 t_rextsize_delta;/* superblock rextsize chg */
 135         int64_t                 t_rbmblocks_delta;/* superblock rbmblocks chg */
 136         int64_t                 t_rblocks_delta;/* superblock rblocks change */
 137         int64_t                 t_rextents_delta;/* superblocks rextents chg */
 138         int64_t                 t_rextslog_delta;/* superblocks rextslog chg */
 139         struct list_head        t_items;        /* log item descriptors */
 140         struct list_head        t_busy;         /* list of busy extents */
 141         unsigned long           t_pflags;       /* saved process flags state */
 142 } xfs_trans_t;
 143
 144 /*
 145  * XFS transaction mechanism exported interfaces that are
 146  * actually macros.
 147  */
 148 #define xfs_trans_set_sync(tp)          ((tp)->t_flags |= XFS_TRANS_SYNC)
 149
 150 #if defined(DEBUG) || defined(XFS_WARN)
 151 #define xfs_trans_agblocks_delta(tp, d) ((tp)->t_ag_freeblks_delta += (int64_t)d)
 152 #define xfs_trans_agflist_delta(tp, d)  ((tp)->t_ag_flist_delta += (int64_t)d)
 153 #define xfs_trans_agbtree_delta(tp, d)  ((tp)->t_ag_btree_delta += (int64_t)d)
 154 #else
 155 #define xfs_trans_agblocks_delta(tp, d)
 156 #define xfs_trans_agflist_delta(tp, d)
 157 #define xfs_trans_agbtree_delta(tp, d)
 158 #endif
 159
 160 /*
 161  * XFS transaction mechanism exported interfaces.
 162  */
 163 int             xfs_trans_alloc(struct xfs_mount *mp, struct xfs_trans_res *resp,
 164                         uint blocks, uint rtextents, uint flags,
 165                         struct xfs_trans **tpp);
 166 int             xfs_trans_alloc_empty(struct xfs_mount *mp,
 167                         struct xfs_trans **tpp);
 168 void            xfs_trans_mod_sb(xfs_trans_t *, uint, int64_t);
 169
 170 struct xfs_buf  *xfs_trans_get_buf_map(struct xfs_trans *tp,
 171                                        struct xfs_buftarg *target,
 172                                        struct xfs_buf_map *map, int nmaps,
 173                                        uint flags);
 174
 175 static inline struct xfs_buf *
 176 xfs_trans_get_buf(
 177         struct xfs_trans        *tp,
 178         struct xfs_buftarg      *target,
 179         xfs_daddr_t             blkno,
 180         int                     numblks,
 181         uint                    flags)
 182 {
 183         DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
 184         return xfs_trans_get_buf_map(tp, target, &map, 1, flags);
 185 }
 186
 187 int             xfs_trans_read_buf_map(struct xfs_mount *mp,
 188                                        struct xfs_trans *tp,
 189                                        struct xfs_buftarg *target,
 190                                        struct xfs_buf_map *map, int nmaps,
 191                                        xfs_buf_flags_t flags,
 192                                        struct xfs_buf **bpp,
 193                                        const struct xfs_buf_ops *ops);
 194
 195 static inline int
 196 xfs_trans_read_buf(
 197         struct xfs_mount        *mp,
 198         struct xfs_trans        *tp,
 199         struct xfs_buftarg      *target,
 200         xfs_daddr_t             blkno,
 201         int                     numblks,
 202         xfs_buf_flags_t         flags,
 203         struct xfs_buf          **bpp,
 204         const struct xfs_buf_ops *ops)
 205 {
 206         DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
 207         return xfs_trans_read_buf_map(mp, tp, target, &map, 1,
 208                                       flags, bpp, ops);
 209 }
 210
 211 struct xfs_buf  *xfs_trans_getsb(xfs_trans_t *, struct xfs_mount *, int);
 212
 213 void            xfs_trans_brelse(xfs_trans_t *, struct xfs_buf *);
 214 void            xfs_trans_bjoin(xfs_trans_t *, struct xfs_buf *);
 215 void            xfs_trans_bhold(xfs_trans_t *, struct xfs_buf *);
 216 void            xfs_trans_bhold_release(xfs_trans_t *, struct xfs_buf *);
 217 void            xfs_trans_binval(xfs_trans_t *, struct xfs_buf *);
 218 void            xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *);
 219 void            xfs_trans_stale_inode_buf(xfs_trans_t *, struct xfs_buf *);
 220 bool            xfs_trans_ordered_buf(xfs_trans_t *, struct xfs_buf *);
 221 void            xfs_trans_dquot_buf(xfs_trans_t *, struct xfs_buf *, uint);
 222 void            xfs_trans_inode_alloc_buf(xfs_trans_t *, struct xfs_buf *);
 223 void            xfs_trans_ichgtime(struct xfs_trans *, struct xfs_inode *, int);
 224 void            xfs_trans_ijoin(struct xfs_trans *, struct xfs_inode *, uint);
 225 void            xfs_trans_log_buf(struct xfs_trans *, struct xfs_buf *, uint,
 226                                   uint);
 227 void            xfs_trans_dirty_buf(struct xfs_trans *, struct xfs_buf *);
 228 void            xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint);
 229
 230 void            xfs_extent_free_init_defer_op(void);
 231 struct xfs_efd_log_item *xfs_trans_get_efd(struct xfs_trans *,
 232                                   struct xfs_efi_log_item *,
 233                                   uint);
 234 int             xfs_trans_free_extent(struct xfs_trans *,
 235                                       struct xfs_efd_log_item *, xfs_fsblock_t,
 236                                       xfs_extlen_t, struct xfs_owner_info *);
 237 int             xfs_trans_commit(struct xfs_trans *);
 238 int             __xfs_trans_roll(struct xfs_trans **, struct xfs_inode *, int *);
 239 int             xfs_trans_roll(struct xfs_trans **, struct xfs_inode *);
 240 void            xfs_trans_cancel(xfs_trans_t *);
 241 int             xfs_trans_ail_init(struct xfs_mount *);
 242 void            xfs_trans_ail_destroy(struct xfs_mount *);
 243
 244 void            xfs_trans_buf_set_type(struct xfs_trans *, struct xfs_buf *,
 245                                        enum xfs_blft);
 246 void            xfs_trans_buf_copy_type(struct xfs_buf *dst_bp,
 247                                         struct xfs_buf *src_bp);
 248
 249 extern kmem_zone_t      *xfs_trans_zone;
 250 extern kmem_zone_t      *xfs_log_item_desc_zone;
 251
 252 /* rmap updates */
 253 enum xfs_rmap_intent_type;
 254
 255 void xfs_rmap_update_init_defer_op(void);
 256 struct xfs_rud_log_item *xfs_trans_get_rud(struct xfs_trans *tp,
 257                 struct xfs_rui_log_item *ruip);
 258 int xfs_trans_log_finish_rmap_update(struct xfs_trans *tp,
 259                 struct xfs_rud_log_item *rudp, enum xfs_rmap_intent_type type,
 260                 __uint64_t owner, int whichfork, xfs_fileoff_t startoff,
 261                 xfs_fsblock_t startblock, xfs_filblks_t blockcount,
 262                 xfs_exntst_t state, struct xfs_btree_cur **pcur);
 263
 264 /* refcount updates */
 265 enum xfs_refcount_intent_type;
 266
 267 void xfs_refcount_update_init_defer_op(void);
 268 struct xfs_cud_log_item *xfs_trans_get_cud(struct xfs_trans *tp,
 269                 struct xfs_cui_log_item *cuip);
 270 int xfs_trans_log_finish_refcount_update(struct xfs_trans *tp,
 271                 struct xfs_cud_log_item *cudp, struct xfs_defer_ops *dfops,
 272                 enum xfs_refcount_intent_type type, xfs_fsblock_t startblock,
 273                 xfs_extlen_t blockcount, xfs_fsblock_t *new_fsb,
 274                 xfs_extlen_t *new_len, struct xfs_btree_cur **pcur);
 275
 276 /* mapping updates */
 277 enum xfs_bmap_intent_type;
 278
 279 void xfs_bmap_update_init_defer_op(void);
 280 struct xfs_bud_log_item *xfs_trans_get_bud(struct xfs_trans *tp,
 281                 struct xfs_bui_log_item *buip);
 282 int xfs_trans_log_finish_bmap_update(struct xfs_trans *tp,
 283                 struct xfs_bud_log_item *rudp, struct xfs_defer_ops *dfops,
 284                 enum xfs_bmap_intent_type type, struct xfs_inode *ip,
 285                 int whichfork, xfs_fileoff_t startoff, xfs_fsblock_t startblock,
 286                 xfs_filblks_t *blockcount, xfs_exntst_t state);
 287
 288 #endif  /* __XFS_TRANS_H__ */