LXR linux/fs/xfs/xfs

   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
  21struct xfs_log_item;
  22
  23/*
  24 * This is the structure written in the log at the head of
  25 * every transaction. It identifies the type and id of the
  26 * transaction, and contains the number of items logged by
  27 * the transaction so we know how many to expect during recovery.
  28 *
  29 * Do not change the below structure without redoing the code in
  30 * xlog_recover_add_to_trans() and xlog_recover_add_to_cont_trans().
  31 */
  32typedef struct xfs_trans_header {
  33        uint            th_magic;               /* magic number */
  34        uint            th_type;                /* transaction type */
  35        __int32_t       th_tid;                 /* transaction id (unused) */
  36        uint            th_num_items;           /* num items logged by trans */
  37} xfs_trans_header_t;
  38
  39#define XFS_TRANS_HEADER_MAGIC  0x5452414e      /* TRAN */
  40
  41/*
  42 * Log item types.
  43 */
  44#define XFS_LI_EFI              0x1236
  45#define XFS_LI_EFD              0x1237
  46#define XFS_LI_IUNLINK          0x1238
  47#define XFS_LI_INODE            0x123b  /* aligned ino chunks, var-size ibufs */
  48#define XFS_LI_BUF              0x123c  /* v2 bufs, variable sized inode bufs */
  49#define XFS_LI_DQUOT            0x123d
  50#define XFS_LI_QUOTAOFF         0x123e
  51
  52#define XFS_LI_TYPE_DESC \
  53        { XFS_LI_EFI,           "XFS_LI_EFI" }, \
  54        { XFS_LI_EFD,           "XFS_LI_EFD" }, \
  55        { XFS_LI_IUNLINK,       "XFS_LI_IUNLINK" }, \
  56        { XFS_LI_INODE,         "XFS_LI_INODE" }, \
  57        { XFS_LI_BUF,           "XFS_LI_BUF" }, \
  58        { XFS_LI_DQUOT,         "XFS_LI_DQUOT" }, \
  59        { XFS_LI_QUOTAOFF,      "XFS_LI_QUOTAOFF" }
  60
  61/*
  62 * Transaction types.  Used to distinguish types of buffers.
  63 */
  64#define XFS_TRANS_SETATTR_NOT_SIZE      1
  65#define XFS_TRANS_SETATTR_SIZE          2
  66#define XFS_TRANS_INACTIVE              3
  67#define XFS_TRANS_CREATE                4
  68#define XFS_TRANS_CREATE_TRUNC          5
  69#define XFS_TRANS_TRUNCATE_FILE         6
  70#define XFS_TRANS_REMOVE                7
  71#define XFS_TRANS_LINK                  8
  72#define XFS_TRANS_RENAME                9
  73#define XFS_TRANS_MKDIR                 10
  74#define XFS_TRANS_RMDIR                 11
  75#define XFS_TRANS_SYMLINK               12
  76#define XFS_TRANS_SET_DMATTRS           13
  77#define XFS_TRANS_GROWFS                14
  78#define XFS_TRANS_STRAT_WRITE           15
  79#define XFS_TRANS_DIOSTRAT              16
  80/* 17 was XFS_TRANS_WRITE_SYNC */
  81#define XFS_TRANS_WRITEID               18
  82#define XFS_TRANS_ADDAFORK              19
  83#define XFS_TRANS_ATTRINVAL             20
  84#define XFS_TRANS_ATRUNCATE             21
  85#define XFS_TRANS_ATTR_SET              22
  86#define XFS_TRANS_ATTR_RM               23
  87#define XFS_TRANS_ATTR_FLAG             24
  88#define XFS_TRANS_CLEAR_AGI_BUCKET      25
  89#define XFS_TRANS_QM_SBCHANGE           26
  90/*
  91 * Dummy entries since we use the transaction type to index into the
  92 * trans_type[] in xlog_recover_print_trans_head()
  93 */
  94#define XFS_TRANS_DUMMY1                27
  95#define XFS_TRANS_DUMMY2                28
  96#define XFS_TRANS_QM_QUOTAOFF           29
  97#define XFS_TRANS_QM_DQALLOC            30
  98#define XFS_TRANS_QM_SETQLIM            31
  99#define XFS_TRANS_QM_DQCLUSTER          32
 100#define XFS_TRANS_QM_QINOCREATE         33
 101#define XFS_TRANS_QM_QUOTAOFF_END       34
 102#define XFS_TRANS_SB_UNIT               35
 103#define XFS_TRANS_FSYNC_TS              36
 104#define XFS_TRANS_GROWFSRT_ALLOC        37
 105#define XFS_TRANS_GROWFSRT_ZERO         38
 106#define XFS_TRANS_GROWFSRT_FREE         39
 107#define XFS_TRANS_SWAPEXT               40
 108#define XFS_TRANS_SB_COUNT              41
 109#define XFS_TRANS_CHECKPOINT            42
 110#define XFS_TRANS_TYPE_MAX              42
 111/* new transaction types need to be reflected in xfs_logprint(8) */
 112
 113#define XFS_TRANS_TYPES \
 114        { XFS_TRANS_SETATTR_NOT_SIZE,   "SETATTR_NOT_SIZE" }, \
 115        { XFS_TRANS_SETATTR_SIZE,       "SETATTR_SIZE" }, \
 116        { XFS_TRANS_INACTIVE,           "INACTIVE" }, \
 117        { XFS_TRANS_CREATE,             "CREATE" }, \
 118        { XFS_TRANS_CREATE_TRUNC,       "CREATE_TRUNC" }, \
 119        { XFS_TRANS_TRUNCATE_FILE,      "TRUNCATE_FILE" }, \
 120        { XFS_TRANS_REMOVE,             "REMOVE" }, \
 121        { XFS_TRANS_LINK,               "LINK" }, \
 122        { XFS_TRANS_RENAME,             "RENAME" }, \
 123        { XFS_TRANS_MKDIR,              "MKDIR" }, \
 124        { XFS_TRANS_RMDIR,              "RMDIR" }, \
 125        { XFS_TRANS_SYMLINK,            "SYMLINK" }, \
 126        { XFS_TRANS_SET_DMATTRS,        "SET_DMATTRS" }, \
 127        { XFS_TRANS_GROWFS,             "GROWFS" }, \
 128        { XFS_TRANS_STRAT_WRITE,        "STRAT_WRITE" }, \
 129        { XFS_TRANS_DIOSTRAT,           "DIOSTRAT" }, \
 130        { XFS_TRANS_WRITEID,            "WRITEID" }, \
 131        { XFS_TRANS_ADDAFORK,           "ADDAFORK" }, \
 132        { XFS_TRANS_ATTRINVAL,          "ATTRINVAL" }, \
 133        { XFS_TRANS_ATRUNCATE,          "ATRUNCATE" }, \
 134        { XFS_TRANS_ATTR_SET,           "ATTR_SET" }, \
 135        { XFS_TRANS_ATTR_RM,            "ATTR_RM" }, \
 136        { XFS_TRANS_ATTR_FLAG,          "ATTR_FLAG" }, \
 137        { XFS_TRANS_CLEAR_AGI_BUCKET,   "CLEAR_AGI_BUCKET" }, \
 138        { XFS_TRANS_QM_SBCHANGE,        "QM_SBCHANGE" }, \
 139        { XFS_TRANS_QM_QUOTAOFF,        "QM_QUOTAOFF" }, \
 140        { XFS_TRANS_QM_DQALLOC,         "QM_DQALLOC" }, \
 141        { XFS_TRANS_QM_SETQLIM,         "QM_SETQLIM" }, \
 142        { XFS_TRANS_QM_DQCLUSTER,       "QM_DQCLUSTER" }, \
 143        { XFS_TRANS_QM_QINOCREATE,      "QM_QINOCREATE" }, \
 144        { XFS_TRANS_QM_QUOTAOFF_END,    "QM_QOFF_END" }, \
 145        { XFS_TRANS_SB_UNIT,            "SB_UNIT" }, \
 146        { XFS_TRANS_FSYNC_TS,           "FSYNC_TS" }, \
 147        { XFS_TRANS_GROWFSRT_ALLOC,     "GROWFSRT_ALLOC" }, \
 148        { XFS_TRANS_GROWFSRT_ZERO,      "GROWFSRT_ZERO" }, \
 149        { XFS_TRANS_GROWFSRT_FREE,      "GROWFSRT_FREE" }, \
 150        { XFS_TRANS_SWAPEXT,            "SWAPEXT" }, \
 151        { XFS_TRANS_SB_COUNT,           "SB_COUNT" }, \
 152        { XFS_TRANS_CHECKPOINT,         "CHECKPOINT" }, \
 153        { XFS_TRANS_DUMMY1,             "DUMMY1" }, \
 154        { XFS_TRANS_DUMMY2,             "DUMMY2" }, \
 155        { XLOG_UNMOUNT_REC_TYPE,        "UNMOUNT" }
 156
 157/*
 158 * This structure is used to track log items associated with
 159 * a transaction.  It points to the log item and keeps some
 160 * flags to track the state of the log item.  It also tracks
 161 * the amount of space needed to log the item it describes
 162 * once we get to commit processing (see xfs_trans_commit()).
 163 */
 164struct xfs_log_item_desc {
 165        struct xfs_log_item     *lid_item;
 166        struct list_head        lid_trans;
 167        unsigned char           lid_flags;
 168};
 169
 170#define XFS_LID_DIRTY           0x1
 171
 172#define XFS_TRANS_MAGIC         0x5452414E      /* 'TRAN' */
 173/*
 174 * Values for t_flags.
 175 */
 176#define XFS_TRANS_DIRTY         0x01    /* something needs to be logged */
 177#define XFS_TRANS_SB_DIRTY      0x02    /* superblock is modified */
 178#define XFS_TRANS_PERM_LOG_RES  0x04    /* xact took a permanent log res */
 179#define XFS_TRANS_SYNC          0x08    /* make commit synchronous */
 180#define XFS_TRANS_DQ_DIRTY      0x10    /* at least one dquot in trx dirty */
 181#define XFS_TRANS_RESERVE       0x20    /* OK to use reserved data blocks */
 182#define XFS_TRANS_FREEZE_PROT   0x40    /* Transaction has elevated writer
 183                                           count in superblock */
 184
 185/*
 186 * Values for call flags parameter.
 187 */
 188#define XFS_TRANS_RELEASE_LOG_RES       0x4
 189#define XFS_TRANS_ABORT                 0x8
 190
 191/*
 192 * Field values for xfs_trans_mod_sb.
 193 */
 194#define XFS_TRANS_SB_ICOUNT             0x00000001
 195#define XFS_TRANS_SB_IFREE              0x00000002
 196#define XFS_TRANS_SB_FDBLOCKS           0x00000004
 197#define XFS_TRANS_SB_RES_FDBLOCKS       0x00000008
 198#define XFS_TRANS_SB_FREXTENTS          0x00000010
 199#define XFS_TRANS_SB_RES_FREXTENTS      0x00000020
 200#define XFS_TRANS_SB_DBLOCKS            0x00000040
 201#define XFS_TRANS_SB_AGCOUNT            0x00000080
 202#define XFS_TRANS_SB_IMAXPCT            0x00000100
 203#define XFS_TRANS_SB_REXTSIZE           0x00000200
 204#define XFS_TRANS_SB_RBMBLOCKS          0x00000400
 205#define XFS_TRANS_SB_RBLOCKS            0x00000800
 206#define XFS_TRANS_SB_REXTENTS           0x00001000
 207#define XFS_TRANS_SB_REXTSLOG           0x00002000
 208
 209
 210/*
 211 * Per-extent log reservation for the allocation btree changes
 212 * involved in freeing or allocating an extent.
 213 * 2 trees * (2 blocks/level * max depth - 1) * block size
 214 */
 215#define XFS_ALLOCFREE_LOG_RES(mp,nx) \
 216        ((nx) * (2 * XFS_FSB_TO_B((mp), 2 * XFS_AG_MAXLEVELS(mp) - 1)))
 217#define XFS_ALLOCFREE_LOG_COUNT(mp,nx) \
 218        ((nx) * (2 * (2 * XFS_AG_MAXLEVELS(mp) - 1)))
 219
 220/*
 221 * Per-directory log reservation for any directory change.
 222 * dir blocks: (1 btree block per level + data block + free block) * dblock size
 223 * bmap btree: (levels + 2) * max depth * block size
 224 * v2 directory blocks can be fragmented below the dirblksize down to the fsb
 225 * size, so account for that in the DAENTER macros.
 226 */
 227#define XFS_DIROP_LOG_RES(mp)   \
 228        (XFS_FSB_TO_B(mp, XFS_DAENTER_BLOCKS(mp, XFS_DATA_FORK)) + \
 229         (XFS_FSB_TO_B(mp, XFS_DAENTER_BMAPS(mp, XFS_DATA_FORK) + 1)))
 230#define XFS_DIROP_LOG_COUNT(mp) \
 231        (XFS_DAENTER_BLOCKS(mp, XFS_DATA_FORK) + \
 232         XFS_DAENTER_BMAPS(mp, XFS_DATA_FORK) + 1)
 233
 234
 235#define XFS_WRITE_LOG_RES(mp)   ((mp)->m_reservations.tr_write)
 236#define XFS_ITRUNCATE_LOG_RES(mp)   ((mp)->m_reservations.tr_itruncate)
 237#define XFS_RENAME_LOG_RES(mp)  ((mp)->m_reservations.tr_rename)
 238#define XFS_LINK_LOG_RES(mp)    ((mp)->m_reservations.tr_link)
 239#define XFS_REMOVE_LOG_RES(mp)  ((mp)->m_reservations.tr_remove)
 240#define XFS_SYMLINK_LOG_RES(mp) ((mp)->m_reservations.tr_symlink)
 241#define XFS_CREATE_LOG_RES(mp)  ((mp)->m_reservations.tr_create)
 242#define XFS_MKDIR_LOG_RES(mp)   ((mp)->m_reservations.tr_mkdir)
 243#define XFS_IFREE_LOG_RES(mp)   ((mp)->m_reservations.tr_ifree)
 244#define XFS_ICHANGE_LOG_RES(mp) ((mp)->m_reservations.tr_ichange)
 245#define XFS_GROWDATA_LOG_RES(mp)    ((mp)->m_reservations.tr_growdata)
 246#define XFS_GROWRTALLOC_LOG_RES(mp)     ((mp)->m_reservations.tr_growrtalloc)
 247#define XFS_GROWRTZERO_LOG_RES(mp)      ((mp)->m_reservations.tr_growrtzero)
 248#define XFS_GROWRTFREE_LOG_RES(mp)      ((mp)->m_reservations.tr_growrtfree)
 249#define XFS_SWRITE_LOG_RES(mp)  ((mp)->m_reservations.tr_swrite)
 250/*
 251 * Logging the inode timestamps on an fsync -- same as SWRITE
 252 * as long as SWRITE logs the entire inode core
 253 */
 254#define XFS_FSYNC_TS_LOG_RES(mp)        ((mp)->m_reservations.tr_swrite)
 255#define XFS_WRITEID_LOG_RES(mp)         ((mp)->m_reservations.tr_swrite)
 256#define XFS_ADDAFORK_LOG_RES(mp)        ((mp)->m_reservations.tr_addafork)
 257#define XFS_ATTRINVAL_LOG_RES(mp)       ((mp)->m_reservations.tr_attrinval)
 258#define XFS_ATTRSETM_LOG_RES(mp)        ((mp)->m_reservations.tr_attrsetm)
 259#define XFS_ATTRSETRT_LOG_RES(mp)       ((mp)->m_reservations.tr_attrsetrt)
 260#define XFS_ATTRRM_LOG_RES(mp)          ((mp)->m_reservations.tr_attrrm)
 261#define XFS_CLEAR_AGI_BUCKET_LOG_RES(mp)  ((mp)->m_reservations.tr_clearagi)
 262#define XFS_QM_SBCHANGE_LOG_RES(mp)     ((mp)->m_reservations.tr_qm_sbchange)
 263#define XFS_QM_SETQLIM_LOG_RES(mp)      ((mp)->m_reservations.tr_qm_setqlim)
 264#define XFS_QM_DQALLOC_LOG_RES(mp)      ((mp)->m_reservations.tr_qm_dqalloc)
 265#define XFS_QM_QUOTAOFF_LOG_RES(mp)     ((mp)->m_reservations.tr_qm_quotaoff)
 266#define XFS_QM_QUOTAOFF_END_LOG_RES(mp) ((mp)->m_reservations.tr_qm_equotaoff)
 267#define XFS_SB_LOG_RES(mp)              ((mp)->m_reservations.tr_sb)
 268
 269/*
 270 * Various log count values.
 271 */
 272#define XFS_DEFAULT_LOG_COUNT           1
 273#define XFS_DEFAULT_PERM_LOG_COUNT      2
 274#define XFS_ITRUNCATE_LOG_COUNT         2
 275#define XFS_INACTIVE_LOG_COUNT          2
 276#define XFS_CREATE_LOG_COUNT            2
 277#define XFS_MKDIR_LOG_COUNT             3
 278#define XFS_SYMLINK_LOG_COUNT           3
 279#define XFS_REMOVE_LOG_COUNT            2
 280#define XFS_LINK_LOG_COUNT              2
 281#define XFS_RENAME_LOG_COUNT            2
 282#define XFS_WRITE_LOG_COUNT             2
 283#define XFS_ADDAFORK_LOG_COUNT          2
 284#define XFS_ATTRINVAL_LOG_COUNT         1
 285#define XFS_ATTRSET_LOG_COUNT           3
 286#define XFS_ATTRRM_LOG_COUNT            3
 287
 288/*
 289 * Here we centralize the specification of XFS meta-data buffer
 290 * reference count values.  This determine how hard the buffer
 291 * cache tries to hold onto the buffer.
 292 */
 293#define XFS_AGF_REF             4
 294#define XFS_AGI_REF             4
 295#define XFS_AGFL_REF            3
 296#define XFS_INO_BTREE_REF       3
 297#define XFS_ALLOC_BTREE_REF     2
 298#define XFS_BMAP_BTREE_REF      2
 299#define XFS_DIR_BTREE_REF       2
 300#define XFS_INO_REF             2
 301#define XFS_ATTR_BTREE_REF      1
 302#define XFS_DQUOT_REF           1
 303
 304#ifdef __KERNEL__
 305
 306struct xfs_buf;
 307struct xfs_buftarg;
 308struct xfs_efd_log_item;
 309struct xfs_efi_log_item;
 310struct xfs_inode;
 311struct xfs_item_ops;
 312struct xfs_log_iovec;
 313struct xfs_log_item_desc;
 314struct xfs_mount;
 315struct xfs_trans;
 316struct xfs_dquot_acct;
 317struct xfs_busy_extent;
 318
 319typedef struct xfs_log_item {
 320        struct list_head                li_ail;         /* AIL pointers */
 321        xfs_lsn_t                       li_lsn;         /* last on-disk lsn */
 322        struct xfs_log_item_desc        *li_desc;       /* ptr to current desc*/
 323        struct xfs_mount                *li_mountp;     /* ptr to fs mount */
 324        struct xfs_ail                  *li_ailp;       /* ptr to AIL */
 325        uint                            li_type;        /* item type */
 326        uint                            li_flags;       /* misc flags */
 327        struct xfs_log_item             *li_bio_list;   /* buffer item list */
 328        void                            (*li_cb)(struct xfs_buf *,
 329                                                 struct xfs_log_item *);
 330                                                        /* buffer item iodone */
 331                                                        /* callback func */
 332        const struct xfs_item_ops       *li_ops;        /* function list */
 333
 334        /* delayed logging */
 335        struct list_head                li_cil;         /* CIL pointers */
 336        struct xfs_log_vec              *li_lv;         /* active log vector */
 337        xfs_lsn_t                       li_seq;         /* CIL commit seq */
 338} xfs_log_item_t;
 339
 340#define XFS_LI_IN_AIL   0x1
 341#define XFS_LI_ABORTED  0x2
 342
 343#define XFS_LI_FLAGS \
 344        { XFS_LI_IN_AIL,        "IN_AIL" }, \
 345        { XFS_LI_ABORTED,       "ABORTED" }
 346
 347struct xfs_item_ops {
 348        uint (*iop_size)(xfs_log_item_t *);
 349        void (*iop_format)(xfs_log_item_t *, struct xfs_log_iovec *);
 350        void (*iop_pin)(xfs_log_item_t *);
 351        void (*iop_unpin)(xfs_log_item_t *, int remove);
 352        uint (*iop_push)(struct xfs_log_item *, struct list_head *);
 353        void (*iop_unlock)(xfs_log_item_t *);
 354        xfs_lsn_t (*iop_committed)(xfs_log_item_t *, xfs_lsn_t);
 355        void (*iop_committing)(xfs_log_item_t *, xfs_lsn_t);
 356};
 357
 358#define IOP_SIZE(ip)            (*(ip)->li_ops->iop_size)(ip)
 359#define IOP_FORMAT(ip,vp)       (*(ip)->li_ops->iop_format)(ip, vp)
 360#define IOP_PIN(ip)             (*(ip)->li_ops->iop_pin)(ip)
 361#define IOP_UNPIN(ip, remove)   (*(ip)->li_ops->iop_unpin)(ip, remove)
 362#define IOP_PUSH(ip, list)      (*(ip)->li_ops->iop_push)(ip, list)
 363#define IOP_UNLOCK(ip)          (*(ip)->li_ops->iop_unlock)(ip)
 364#define IOP_COMMITTED(ip, lsn)  (*(ip)->li_ops->iop_committed)(ip, lsn)
 365#define IOP_COMMITTING(ip, lsn) (*(ip)->li_ops->iop_committing)(ip, lsn)
 366
 367/*
 368 * Return values for the IOP_PUSH() routines.
 369 */
 370#define XFS_ITEM_SUCCESS        0
 371#define XFS_ITEM_PINNED         1
 372#define XFS_ITEM_LOCKED         2
 373#define XFS_ITEM_FLUSHING       3
 374
 375/*
 376 * This is the type of function which can be given to xfs_trans_callback()
 377 * to be called upon the transaction's commit to disk.
 378 */
 379typedef void (*xfs_trans_callback_t)(struct xfs_trans *, void *);
 380
 381/*
 382 * This is the structure maintained for every active transaction.
 383 */
 384typedef struct xfs_trans {
 385        unsigned int            t_magic;        /* magic number */
 386        xfs_log_callback_t      t_logcb;        /* log callback struct */
 387        unsigned int            t_type;         /* transaction type */
 388        unsigned int            t_log_res;      /* amt of log space resvd */
 389        unsigned int            t_log_count;    /* count for perm log res */
 390        unsigned int            t_blk_res;      /* # of blocks resvd */
 391        unsigned int            t_blk_res_used; /* # of resvd blocks used */
 392        unsigned int            t_rtx_res;      /* # of rt extents resvd */
 393        unsigned int            t_rtx_res_used; /* # of resvd rt extents used */
 394        struct xlog_ticket      *t_ticket;      /* log mgr ticket */
 395        xfs_lsn_t               t_lsn;          /* log seq num of start of
 396                                                 * transaction. */
 397        xfs_lsn_t               t_commit_lsn;   /* log seq num of end of
 398                                                 * transaction. */
 399        struct xfs_mount        *t_mountp;      /* ptr to fs mount struct */
 400        struct xfs_dquot_acct   *t_dqinfo;      /* acctg info for dquots */
 401        unsigned int            t_flags;        /* misc flags */
 402        int64_t                 t_icount_delta; /* superblock icount change */
 403        int64_t                 t_ifree_delta;  /* superblock ifree change */
 404        int64_t                 t_fdblocks_delta; /* superblock fdblocks chg */
 405        int64_t                 t_res_fdblocks_delta; /* on-disk only chg */
 406        int64_t                 t_frextents_delta;/* superblock freextents chg*/
 407        int64_t                 t_res_frextents_delta; /* on-disk only chg */
 408#if defined(DEBUG) || defined(XFS_WARN)
 409        int64_t                 t_ag_freeblks_delta; /* debugging counter */
 410        int64_t                 t_ag_flist_delta; /* debugging counter */
 411        int64_t                 t_ag_btree_delta; /* debugging counter */
 412#endif
 413        int64_t                 t_dblocks_delta;/* superblock dblocks change */
 414        int64_t                 t_agcount_delta;/* superblock agcount change */
 415        int64_t                 t_imaxpct_delta;/* superblock imaxpct change */
 416        int64_t                 t_rextsize_delta;/* superblock rextsize chg */
 417        int64_t                 t_rbmblocks_delta;/* superblock rbmblocks chg */
 418        int64_t                 t_rblocks_delta;/* superblock rblocks change */
 419        int64_t                 t_rextents_delta;/* superblocks rextents chg */
 420        int64_t                 t_rextslog_delta;/* superblocks rextslog chg */
 421        struct list_head        t_items;        /* log item descriptors */
 422        xfs_trans_header_t      t_header;       /* header for in-log trans */
 423        struct list_head        t_busy;         /* list of busy extents */
 424        unsigned long           t_pflags;       /* saved process flags state */
 425} xfs_trans_t;
 426
 427/*
 428 * XFS transaction mechanism exported interfaces that are
 429 * actually macros.
 430 */
 431#define xfs_trans_get_log_res(tp)       ((tp)->t_log_res)
 432#define xfs_trans_get_log_count(tp)     ((tp)->t_log_count)
 433#define xfs_trans_get_block_res(tp)     ((tp)->t_blk_res)
 434#define xfs_trans_set_sync(tp)          ((tp)->t_flags |= XFS_TRANS_SYNC)
 435
 436#if defined(DEBUG) || defined(XFS_WARN)
 437#define xfs_trans_agblocks_delta(tp, d) ((tp)->t_ag_freeblks_delta += (int64_t)d)
 438#define xfs_trans_agflist_delta(tp, d)  ((tp)->t_ag_flist_delta += (int64_t)d)
 439#define xfs_trans_agbtree_delta(tp, d)  ((tp)->t_ag_btree_delta += (int64_t)d)
 440#else
 441#define xfs_trans_agblocks_delta(tp, d)
 442#define xfs_trans_agflist_delta(tp, d)
 443#define xfs_trans_agbtree_delta(tp, d)
 444#endif
 445
 446/*
 447 * XFS transaction mechanism exported interfaces.
 448 */
 449xfs_trans_t     *xfs_trans_alloc(struct xfs_mount *, uint);
 450xfs_trans_t     *_xfs_trans_alloc(struct xfs_mount *, uint, xfs_km_flags_t);
 451xfs_trans_t     *xfs_trans_dup(xfs_trans_t *);
 452int             xfs_trans_reserve(xfs_trans_t *, uint, uint, uint,
 453                                  uint, uint);
 454void            xfs_trans_mod_sb(xfs_trans_t *, uint, int64_t);
 455
 456struct xfs_buf  *xfs_trans_get_buf_map(struct xfs_trans *tp,
 457                                       struct xfs_buftarg *target,
 458                                       struct xfs_buf_map *map, int nmaps,
 459                                       uint flags);
 460
 461static inline struct xfs_buf *
 462xfs_trans_get_buf(
 463        struct xfs_trans        *tp,
 464        struct xfs_buftarg      *target,
 465        xfs_daddr_t             blkno,
 466        int                     numblks,
 467        uint                    flags)
 468{
 469        DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
 470        return xfs_trans_get_buf_map(tp, target, &map, 1, flags);
 471}
 472
 473int             xfs_trans_read_buf_map(struct xfs_mount *mp,
 474                                       struct xfs_trans *tp,
 475                                       struct xfs_buftarg *target,
 476                                       struct xfs_buf_map *map, int nmaps,
 477                                       xfs_buf_flags_t flags,
 478                                       struct xfs_buf **bpp,
 479                                       const struct xfs_buf_ops *ops);
 480
 481static inline int
 482xfs_trans_read_buf(
 483        struct xfs_mount        *mp,
 484        struct xfs_trans        *tp,
 485        struct xfs_buftarg      *target,
 486        xfs_daddr_t             blkno,
 487        int                     numblks,
 488        xfs_buf_flags_t         flags,
 489        struct xfs_buf          **bpp,
 490        const struct xfs_buf_ops *ops)
 491{
 492        DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
 493        return xfs_trans_read_buf_map(mp, tp, target, &map, 1,
 494                                      flags, bpp, ops);
 495}
 496
 497struct xfs_buf  *xfs_trans_getsb(xfs_trans_t *, struct xfs_mount *, int);
 498
 499void            xfs_trans_brelse(xfs_trans_t *, struct xfs_buf *);
 500void            xfs_trans_bjoin(xfs_trans_t *, struct xfs_buf *);
 501void            xfs_trans_bhold(xfs_trans_t *, struct xfs_buf *);
 502void            xfs_trans_bhold_release(xfs_trans_t *, struct xfs_buf *);
 503void            xfs_trans_binval(xfs_trans_t *, struct xfs_buf *);
 504void            xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *);
 505void            xfs_trans_stale_inode_buf(xfs_trans_t *, struct xfs_buf *);
 506void            xfs_trans_dquot_buf(xfs_trans_t *, struct xfs_buf *, uint);
 507void            xfs_trans_inode_alloc_buf(xfs_trans_t *, struct xfs_buf *);
 508void            xfs_trans_ichgtime(struct xfs_trans *, struct xfs_inode *, int);
 509void            xfs_trans_ijoin(struct xfs_trans *, struct xfs_inode *, uint);
 510void            xfs_trans_log_buf(xfs_trans_t *, struct xfs_buf *, uint, uint);
 511void            xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint);
 512struct xfs_efi_log_item *xfs_trans_get_efi(xfs_trans_t *, uint);
 513void            xfs_efi_release(struct xfs_efi_log_item *, uint);
 514void            xfs_trans_log_efi_extent(xfs_trans_t *,
 515                                         struct xfs_efi_log_item *,
 516                                         xfs_fsblock_t,
 517                                         xfs_extlen_t);
 518struct xfs_efd_log_item *xfs_trans_get_efd(xfs_trans_t *,
 519                                  struct xfs_efi_log_item *,
 520                                  uint);
 521void            xfs_trans_log_efd_extent(xfs_trans_t *,
 522                                         struct xfs_efd_log_item *,
 523                                         xfs_fsblock_t,
 524                                         xfs_extlen_t);
 525int             xfs_trans_commit(xfs_trans_t *, uint flags);
 526void            xfs_trans_cancel(xfs_trans_t *, int);
 527int             xfs_trans_ail_init(struct xfs_mount *);
 528void            xfs_trans_ail_destroy(struct xfs_mount *);
 529
 530extern kmem_zone_t      *xfs_trans_zone;
 531extern kmem_zone_t      *xfs_log_item_desc_zone;
 532
 533#endif  /* __KERNEL__ */
 534
 535void            xfs_trans_init(struct xfs_mount *);
 536int             xfs_trans_roll(struct xfs_trans **, struct xfs_inode *);
 537
 538#endif  /* __XFS_TRANS_H__ */
 539