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_rud_log_item;
  36 struct xfs_rui_log_item;
  37 struct xfs_btree_cur;
  38 struct xfs_cui_log_item;
  39 struct xfs_cud_log_item;
  40 struct xfs_defer_ops;
  41 struct xfs_bui_log_item;
  42 struct xfs_bud_log_item;
  43
  44 typedef struct xfs_log_item {
  45         struct list_head                li_ail;         /* AIL pointers */
  46         xfs_lsn_t                       li_lsn;         /* last on-disk lsn */
  47         struct xfs_log_item_desc        *li_desc;       /* ptr to current desc*/
  48         struct xfs_mount                *li_mountp;     /* ptr to fs mount */
  49         struct xfs_ail                  *li_ailp;       /* ptr to AIL */
  50         uint                            li_type;        /* item type */
  51         uint                            li_flags;       /* misc flags */
  52         struct xfs_buf                  *li_buf;        /* real buffer pointer */
  53         struct list_head                li_bio_list;    /* buffer item list */
  54         void                            (*li_cb)(struct xfs_buf *,
  55                                                  struct xfs_log_item *);
  56                                                         /* buffer item iodone */
  57                                                         /* callback func */
  58         const struct xfs_item_ops       *li_ops;        /* function list */
  59
  60         /* delayed logging */
  61         struct list_head                li_cil;         /* CIL pointers */
  62         struct xfs_log_vec              *li_lv;         /* active log vector */
  63         struct xfs_log_vec              *li_lv_shadow;  /* standby vector */
  64         xfs_lsn_t                       li_seq;         /* CIL commit seq */
  65 } xfs_log_item_t;
  66
  67 #define XFS_LI_IN_AIL   0x1
  68 #define XFS_LI_ABORTED  0x2
  69 #define XFS_LI_FAILED   0x4
  70
  71 #define XFS_LI_FLAGS \
  72         { XFS_LI_IN_AIL,        "IN_AIL" }, \
  73         { XFS_LI_ABORTED,       "ABORTED" }, \
  74         { XFS_LI_FAILED,        "FAILED" }
  75
  76 struct xfs_item_ops {
  77         void (*iop_size)(xfs_log_item_t *, int *, int *);
  78         void (*iop_format)(xfs_log_item_t *, struct xfs_log_vec *);
  79         void (*iop_pin)(xfs_log_item_t *);
  80         void (*iop_unpin)(xfs_log_item_t *, int remove);
  81         uint (*iop_push)(struct xfs_log_item *, struct list_head *);
  82         void (*iop_unlock)(xfs_log_item_t *);
  83         xfs_lsn_t (*iop_committed)(xfs_log_item_t *, xfs_lsn_t);
  84         void (*iop_committing)(xfs_log_item_t *, xfs_lsn_t);
  85         void (*iop_error)(xfs_log_item_t *, xfs_buf_t *);
  86 };
  87
  88 void    xfs_log_item_init(struct xfs_mount *mp, struct xfs_log_item *item,
  89                           int type, const struct xfs_item_ops *ops);
  90
  91 /*
  92  * Return values for the iop_push() routines.
  93  */
  94 #define XFS_ITEM_SUCCESS        0
  95 #define XFS_ITEM_PINNED         1
  96 #define XFS_ITEM_LOCKED         2
  97 #define XFS_ITEM_FLUSHING       3
  98
  99
 100 /*
 101  * This is the structure maintained for every active transaction.
 102  */
 103 typedef struct xfs_trans {
 104         unsigned int            t_magic;        /* magic number */
 105         unsigned int            t_log_res;      /* amt of log space resvd */
 106         unsigned int            t_log_count;    /* count for perm log res */
 107         unsigned int            t_blk_res;      /* # of blocks resvd */
 108         unsigned int            t_blk_res_used; /* # of resvd blocks used */
 109         unsigned int            t_rtx_res;      /* # of rt extents resvd */
 110         unsigned int            t_rtx_res_used; /* # of resvd rt extents used */
 111         struct xlog_ticket      *t_ticket;      /* log mgr ticket */
 112         struct xfs_mount        *t_mountp;      /* ptr to fs mount struct */
 113         struct xfs_dquot_acct   *t_dqinfo;      /* acctg info for dquots */
 114         unsigned int            t_flags;        /* misc flags */
 115         int64_t                 t_icount_delta; /* superblock icount change */
 116         int64_t                 t_ifree_delta;  /* superblock ifree change */
 117         int64_t                 t_fdblocks_delta; /* superblock fdblocks chg */
 118         int64_t                 t_res_fdblocks_delta; /* on-disk only chg */
 119         int64_t                 t_frextents_delta;/* superblock freextents chg*/
 120         int64_t                 t_res_frextents_delta; /* on-disk only chg */
 121 #if defined(DEBUG) || defined(XFS_WARN)
 122         int64_t                 t_ag_freeblks_delta; /* debugging counter */
 123         int64_t                 t_ag_flist_delta; /* debugging counter */
 124         int64_t                 t_ag_btree_delta; /* debugging counter */
 125 #endif
 126         int64_t                 t_dblocks_delta;/* superblock dblocks change */
 127         int64_t                 t_agcount_delta;/* superblock agcount change */
 128         int64_t                 t_imaxpct_delta;/* superblock imaxpct change */
 129         int64_t                 t_rextsize_delta;/* superblock rextsize chg */
 130         int64_t                 t_rbmblocks_delta;/* superblock rbmblocks chg */
 131         int64_t                 t_rblocks_delta;/* superblock rblocks change */
 132         int64_t                 t_rextents_delta;/* superblocks rextents chg */
 133         int64_t                 t_rextslog_delta;/* superblocks rextslog chg */
 134         struct list_head        t_items;        /* log item descriptors */
 135         struct list_head        t_busy;         /* list of busy extents */
 136         unsigned long           t_pflags;       /* saved process flags state */
 137 } xfs_trans_t;
 138
 139 /*
 140  * XFS transaction mechanism exported interfaces that are
 141  * actually macros.
 142  */
 143 #define xfs_trans_set_sync(tp)          ((tp)->t_flags |= XFS_TRANS_SYNC)
 144
 145 #if defined(DEBUG) || defined(XFS_WARN)
 146 #define xfs_trans_agblocks_delta(tp, d) ((tp)->t_ag_freeblks_delta += (int64_t)d)
 147 #define xfs_trans_agflist_delta(tp, d)  ((tp)->t_ag_flist_delta += (int64_t)d)
 148 #define xfs_trans_agbtree_delta(tp, d)  ((tp)->t_ag_btree_delta += (int64_t)d)
 149 #else
 150 #define xfs_trans_agblocks_delta(tp, d)
 151 #define xfs_trans_agflist_delta(tp, d)
 152 #define xfs_trans_agbtree_delta(tp, d)
 153 #endif
 154
 155 /*
 156  * XFS transaction mechanism exported interfaces.
 157  */
 158 int             xfs_trans_alloc(struct xfs_mount *mp, struct xfs_trans_res *resp,
 159                         uint blocks, uint rtextents, uint flags,
 160                         struct xfs_trans **tpp);
 161 int             xfs_trans_alloc_empty(struct xfs_mount *mp,
 162                         struct xfs_trans **tpp);
 163 void            xfs_trans_mod_sb(xfs_trans_t *, uint, int64_t);
 164
 165 struct xfs_buf  *xfs_trans_get_buf_map(struct xfs_trans *tp,
 166                                        struct xfs_buftarg *target,
 167                                        struct xfs_buf_map *map, int nmaps,
 168                                        uint flags);
 169
 170 static inline struct xfs_buf *
 171 xfs_trans_get_buf(
 172         struct xfs_trans        *tp,
 173         struct xfs_buftarg      *target,
 174         xfs_daddr_t             blkno,
 175         int                     numblks,
 176         uint                    flags)
 177 {
 178         DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
 179         return xfs_trans_get_buf_map(tp, target, &map, 1, flags);
 180 }
 181
 182 int             xfs_trans_read_buf_map(struct xfs_mount *mp,
 183                                        struct xfs_trans *tp,
 184                                        struct xfs_buftarg *target,
 185                                        struct xfs_buf_map *map, int nmaps,
 186                                        xfs_buf_flags_t flags,
 187                                        struct xfs_buf **bpp,
 188                                        const struct xfs_buf_ops *ops);
 189
 190 static inline int
 191 xfs_trans_read_buf(
 192         struct xfs_mount        *mp,
 193         struct xfs_trans        *tp,
 194         struct xfs_buftarg      *target,
 195         xfs_daddr_t             blkno,
 196         int                     numblks,
 197         xfs_buf_flags_t         flags,
 198         struct xfs_buf          **bpp,
 199         const struct xfs_buf_ops *ops)
 200 {
 201         DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
 202         return xfs_trans_read_buf_map(mp, tp, target, &map, 1,
 203                                       flags, bpp, ops);
 204 }
 205
 206 struct xfs_buf  *xfs_trans_getsb(xfs_trans_t *, struct xfs_mount *, int);
 207
 208 void            xfs_trans_brelse(xfs_trans_t *, struct xfs_buf *);
 209 void            xfs_trans_bjoin(xfs_trans_t *, struct xfs_buf *);
 210 void            xfs_trans_bhold(xfs_trans_t *, struct xfs_buf *);
 211 void            xfs_trans_bhold_release(xfs_trans_t *, struct xfs_buf *);
 212 void            xfs_trans_binval(xfs_trans_t *, struct xfs_buf *);
 213 void            xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *);
 214 void            xfs_trans_stale_inode_buf(xfs_trans_t *, struct xfs_buf *);
 215 bool            xfs_trans_ordered_buf(xfs_trans_t *, struct xfs_buf *);
 216 void            xfs_trans_dquot_buf(xfs_trans_t *, struct xfs_buf *, uint);
 217 void            xfs_trans_inode_alloc_buf(xfs_trans_t *, struct xfs_buf *);
 218 void            xfs_trans_ichgtime(struct xfs_trans *, struct xfs_inode *, int);
 219 void            xfs_trans_ijoin(struct xfs_trans *, struct xfs_inode *, uint);
 220 void            xfs_trans_log_buf(struct xfs_trans *, struct xfs_buf *, uint,
 221                                   uint);
 222 void            xfs_trans_dirty_buf(struct xfs_trans *, struct xfs_buf *);
 223 void            xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint);
 224
 225 void            xfs_extent_free_init_defer_op(void);
 226 struct xfs_efd_log_item *xfs_trans_get_efd(struct xfs_trans *,
 227                                   struct xfs_efi_log_item *,
 228                                   uint);
 229 int             xfs_trans_free_extent(struct xfs_trans *,
 230                                       struct xfs_efd_log_item *, xfs_fsblock_t,
 231                                       xfs_extlen_t, struct xfs_owner_info *);
 232 int             xfs_trans_commit(struct xfs_trans *);
 233 int             xfs_trans_roll(struct xfs_trans **);
 234 int             xfs_trans_roll_inode(struct xfs_trans **, struct xfs_inode *);
 235 void            xfs_trans_cancel(xfs_trans_t *);
 236 int             xfs_trans_ail_init(struct xfs_mount *);
 237 void            xfs_trans_ail_destroy(struct xfs_mount *);
 238
 239 void            xfs_trans_buf_set_type(struct xfs_trans *, struct xfs_buf *,
 240                                        enum xfs_blft);
 241 void            xfs_trans_buf_copy_type(struct xfs_buf *dst_bp,
 242                                         struct xfs_buf *src_bp);
 243
 244 extern kmem_zone_t      *xfs_trans_zone;
 245 extern kmem_zone_t      *xfs_log_item_desc_zone;
 246
 247 /* rmap updates */
 248 enum xfs_rmap_intent_type;
 249
 250 void xfs_rmap_update_init_defer_op(void);
 251 struct xfs_rud_log_item *xfs_trans_get_rud(struct xfs_trans *tp,
 252                 struct xfs_rui_log_item *ruip);
 253 int xfs_trans_log_finish_rmap_update(struct xfs_trans *tp,
 254                 struct xfs_rud_log_item *rudp, enum xfs_rmap_intent_type type,
 255                 uint64_t owner, int whichfork, xfs_fileoff_t startoff,
 256                 xfs_fsblock_t startblock, xfs_filblks_t blockcount,
 257                 xfs_exntst_t state, struct xfs_btree_cur **pcur);
 258
 259 /* refcount updates */
 260 enum xfs_refcount_intent_type;
 261
 262 void xfs_refcount_update_init_defer_op(void);
 263 struct xfs_cud_log_item *xfs_trans_get_cud(struct xfs_trans *tp,
 264                 struct xfs_cui_log_item *cuip);
 265 int xfs_trans_log_finish_refcount_update(struct xfs_trans *tp,
 266                 struct xfs_cud_log_item *cudp, struct xfs_defer_ops *dfops,
 267                 enum xfs_refcount_intent_type type, xfs_fsblock_t startblock,
 268                 xfs_extlen_t blockcount, xfs_fsblock_t *new_fsb,
 269                 xfs_extlen_t *new_len, struct xfs_btree_cur **pcur);
 270
 271 /* mapping updates */
 272 enum xfs_bmap_intent_type;
 273
 274 void xfs_bmap_update_init_defer_op(void);
 275 struct xfs_bud_log_item *xfs_trans_get_bud(struct xfs_trans *tp,
 276                 struct xfs_bui_log_item *buip);
 277 int xfs_trans_log_finish_bmap_update(struct xfs_trans *tp,
 278                 struct xfs_bud_log_item *rudp, struct xfs_defer_ops *dfops,
 279                 enum xfs_bmap_intent_type type, struct xfs_inode *ip,
 280                 int whichfork, xfs_fileoff_t startoff, xfs_fsblock_t startblock,
 281                 xfs_filblks_t *blockcount, xfs_exntst_t state);
 282
 283 #endif  /* __XFS_TRANS_H__ */