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 struct xfs_log_item;
  22
  23 #include "xfs_trans_resv.h"
  24
  25 /* kernel only transaction subsystem defines */
  26
  27 struct xfs_buf;
  28 struct xfs_buftarg;
  29 struct xfs_efd_log_item;
  30 struct xfs_efi_log_item;
  31 struct xfs_inode;
  32 struct xfs_item_ops;
  33 struct xfs_log_iovec;
  34 struct xfs_log_item_desc;
  35 struct xfs_mount;
  36 struct xfs_trans;
  37 struct xfs_trans_res;
  38 struct xfs_dquot_acct;
  39 struct xfs_busy_extent;
  40
  41 typedef struct xfs_log_item {
  42         struct list_head                li_ail;         /* AIL pointers */
  43         xfs_lsn_t                       li_lsn;         /* last on-disk lsn */
  44         struct xfs_log_item_desc        *li_desc;       /* ptr to current desc*/
  45         struct xfs_mount                *li_mountp;     /* ptr to fs mount */
  46         struct xfs_ail                  *li_ailp;       /* ptr to AIL */
  47         uint                            li_type;        /* item type */
  48         uint                            li_flags;       /* misc flags */
  49         struct xfs_log_item             *li_bio_list;   /* buffer item list */
  50         void                            (*li_cb)(struct xfs_buf *,
  51                                                  struct xfs_log_item *);
  52                                                         /* buffer item iodone */
  53                                                         /* callback func */
  54         const struct xfs_item_ops       *li_ops;        /* function list */
  55
  56         /* delayed logging */
  57         struct list_head                li_cil;         /* CIL pointers */
  58         struct xfs_log_vec              *li_lv;         /* active log 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_iovec *);
  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 /*
  81  * Return values for the iop_push() routines.
  82  */
  83 #define XFS_ITEM_SUCCESS        0
  84 #define XFS_ITEM_PINNED         1
  85 #define XFS_ITEM_LOCKED         2
  86 #define XFS_ITEM_FLUSHING       3
  87
  88 /*
  89  * This is the type of function which can be given to xfs_trans_callback()
  90  * to be called upon the transaction's commit to disk.
  91  */
  92 typedef void (*xfs_trans_callback_t)(struct xfs_trans *, void *);
  93
  94 /*
  95  * This is the structure maintained for every active transaction.
  96  */
  97 typedef struct xfs_trans {
  98         unsigned int            t_magic;        /* magic number */
  99         xfs_log_callback_t      t_logcb;        /* log callback struct */
 100         unsigned int            t_type;         /* transaction type */
 101         unsigned int            t_log_res;      /* amt of log space resvd */
 102         unsigned int            t_log_count;    /* count for perm log res */
 103         unsigned int            t_blk_res;      /* # of blocks resvd */
 104         unsigned int            t_blk_res_used; /* # of resvd blocks used */
 105         unsigned int            t_rtx_res;      /* # of rt extents resvd */
 106         unsigned int            t_rtx_res_used; /* # of resvd rt extents used */
 107         struct xlog_ticket      *t_ticket;      /* log mgr ticket */
 108         xfs_lsn_t               t_lsn;          /* log seq num of start of
 109                                                  * transaction. */
 110         xfs_lsn_t               t_commit_lsn;   /* log seq num of end of
 111                                                  * transaction. */
 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         xfs_trans_header_t      t_header;       /* header for in-log trans */
 136         struct list_head        t_busy;         /* list of busy extents */
 137         unsigned long           t_pflags;       /* saved process flags state */
 138 } xfs_trans_t;
 139
 140 /*
 141  * XFS transaction mechanism exported interfaces that are
 142  * actually macros.
 143  */
 144 #define xfs_trans_get_log_res(tp)       ((tp)->t_log_res)
 145 #define xfs_trans_get_log_count(tp)     ((tp)->t_log_count)
 146 #define xfs_trans_get_block_res(tp)     ((tp)->t_blk_res)
 147 #define xfs_trans_set_sync(tp)          ((tp)->t_flags |= XFS_TRANS_SYNC)
 148
 149 #if defined(DEBUG) || defined(XFS_WARN)
 150 #define xfs_trans_agblocks_delta(tp, d) ((tp)->t_ag_freeblks_delta += (int64_t)d)
 151 #define xfs_trans_agflist_delta(tp, d)  ((tp)->t_ag_flist_delta += (int64_t)d)
 152 #define xfs_trans_agbtree_delta(tp, d)  ((tp)->t_ag_btree_delta += (int64_t)d)
 153 #else
 154 #define xfs_trans_agblocks_delta(tp, d)
 155 #define xfs_trans_agflist_delta(tp, d)
 156 #define xfs_trans_agbtree_delta(tp, d)
 157 #endif
 158
 159 /*
 160  * XFS transaction mechanism exported interfaces.
 161  */
 162 xfs_trans_t     *xfs_trans_alloc(struct xfs_mount *, uint);
 163 xfs_trans_t     *_xfs_trans_alloc(struct xfs_mount *, uint, xfs_km_flags_t);
 164 xfs_trans_t     *xfs_trans_dup(xfs_trans_t *);
 165 int             xfs_trans_reserve(struct xfs_trans *, struct xfs_trans_res *,
 166                                   uint, uint);
 167 void            xfs_trans_mod_sb(xfs_trans_t *, uint, int64_t);
 168
 169 struct xfs_buf  *xfs_trans_get_buf_map(struct xfs_trans *tp,
 170                                        struct xfs_buftarg *target,
 171                                        struct xfs_buf_map *map, int nmaps,
 172                                        uint flags);
 173
 174 static inline struct xfs_buf *
 175 xfs_trans_get_buf(
 176         struct xfs_trans        *tp,
 177         struct xfs_buftarg      *target,
 178         xfs_daddr_t             blkno,
 179         int                     numblks,
 180         uint                    flags)
 181 {
 182         DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
 183         return xfs_trans_get_buf_map(tp, target, &map, 1, flags);
 184 }
 185
 186 int             xfs_trans_read_buf_map(struct xfs_mount *mp,
 187                                        struct xfs_trans *tp,
 188                                        struct xfs_buftarg *target,
 189                                        struct xfs_buf_map *map, int nmaps,
 190                                        xfs_buf_flags_t flags,
 191                                        struct xfs_buf **bpp,
 192                                        const struct xfs_buf_ops *ops);
 193
 194 static inline int
 195 xfs_trans_read_buf(
 196         struct xfs_mount        *mp,
 197         struct xfs_trans        *tp,
 198         struct xfs_buftarg      *target,
 199         xfs_daddr_t             blkno,
 200         int                     numblks,
 201         xfs_buf_flags_t         flags,
 202         struct xfs_buf          **bpp,
 203         const struct xfs_buf_ops *ops)
 204 {
 205         DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
 206         return xfs_trans_read_buf_map(mp, tp, target, &map, 1,
 207                                       flags, bpp, ops);
 208 }
 209
 210 struct xfs_buf  *xfs_trans_getsb(xfs_trans_t *, struct xfs_mount *, int);
 211
 212 void            xfs_trans_brelse(xfs_trans_t *, struct xfs_buf *);
 213 void            xfs_trans_bjoin(xfs_trans_t *, struct xfs_buf *);
 214 void            xfs_trans_bhold(xfs_trans_t *, struct xfs_buf *);
 215 void            xfs_trans_bhold_release(xfs_trans_t *, struct xfs_buf *);
 216 void            xfs_trans_binval(xfs_trans_t *, struct xfs_buf *);
 217 void            xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *);
 218 void            xfs_trans_stale_inode_buf(xfs_trans_t *, struct xfs_buf *);
 219 void            xfs_trans_ordered_buf(xfs_trans_t *, struct xfs_buf *);
 220 void            xfs_trans_dquot_buf(xfs_trans_t *, struct xfs_buf *, uint);
 221 void            xfs_trans_inode_alloc_buf(xfs_trans_t *, struct xfs_buf *);
 222 void            xfs_trans_ichgtime(struct xfs_trans *, struct xfs_inode *, int);
 223 void            xfs_trans_ijoin(struct xfs_trans *, struct xfs_inode *, uint);
 224 void            xfs_trans_log_buf(xfs_trans_t *, struct xfs_buf *, uint, uint);
 225 void            xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint);
 226 struct xfs_efi_log_item *xfs_trans_get_efi(xfs_trans_t *, uint);
 227 void            xfs_efi_release(struct xfs_efi_log_item *, uint);
 228 void            xfs_trans_log_efi_extent(xfs_trans_t *,
 229                                          struct xfs_efi_log_item *,
 230                                          xfs_fsblock_t,
 231                                          xfs_extlen_t);
 232 struct xfs_efd_log_item *xfs_trans_get_efd(xfs_trans_t *,
 233                                   struct xfs_efi_log_item *,
 234                                   uint);
 235 void            xfs_trans_log_efd_extent(xfs_trans_t *,
 236                                          struct xfs_efd_log_item *,
 237                                          xfs_fsblock_t,
 238                                          xfs_extlen_t);
 239 int             xfs_trans_commit(xfs_trans_t *, uint flags);
 240 void            xfs_trans_cancel(xfs_trans_t *, int);
 241 int             xfs_trans_ail_init(struct xfs_mount *);
 242 void            xfs_trans_ail_destroy(struct xfs_mount *);
 243
 244 extern kmem_zone_t      *xfs_trans_zone;
 245 extern kmem_zone_t      *xfs_log_item_desc_zone;
 246
 247 #endif  /* __XFS_TRANS_H__ */