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 /*
  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  */
  32 typedef 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 #define XFS_LI_ICREATE          0x123f
  52
  53 #define XFS_LI_TYPE_DESC \
  54         { XFS_LI_EFI,           "XFS_LI_EFI" }, \
  55         { XFS_LI_EFD,           "XFS_LI_EFD" }, \
  56         { XFS_LI_IUNLINK,       "XFS_LI_IUNLINK" }, \
  57         { XFS_LI_INODE,         "XFS_LI_INODE" }, \
  58         { XFS_LI_BUF,           "XFS_LI_BUF" }, \
  59         { XFS_LI_DQUOT,         "XFS_LI_DQUOT" }, \
  60         { XFS_LI_QUOTAOFF,      "XFS_LI_QUOTAOFF" }
  61
  62 /*
  63  * Transaction types.  Used to distinguish types of buffers.
  64  */
  65 #define XFS_TRANS_SETATTR_NOT_SIZE      1
  66 #define XFS_TRANS_SETATTR_SIZE          2
  67 #define XFS_TRANS_INACTIVE              3
  68 #define XFS_TRANS_CREATE                4
  69 #define XFS_TRANS_CREATE_TRUNC          5
  70 #define XFS_TRANS_TRUNCATE_FILE         6
  71 #define XFS_TRANS_REMOVE                7
  72 #define XFS_TRANS_LINK                  8
  73 #define XFS_TRANS_RENAME                9
  74 #define XFS_TRANS_MKDIR                 10
  75 #define XFS_TRANS_RMDIR                 11
  76 #define XFS_TRANS_SYMLINK               12
  77 #define XFS_TRANS_SET_DMATTRS           13
  78 #define XFS_TRANS_GROWFS                14
  79 #define XFS_TRANS_STRAT_WRITE           15
  80 #define XFS_TRANS_DIOSTRAT              16
  81 /* 17 was XFS_TRANS_WRITE_SYNC */
  82 #define XFS_TRANS_WRITEID               18
  83 #define XFS_TRANS_ADDAFORK              19
  84 #define XFS_TRANS_ATTRINVAL             20
  85 #define XFS_TRANS_ATRUNCATE             21
  86 #define XFS_TRANS_ATTR_SET              22
  87 #define XFS_TRANS_ATTR_RM               23
  88 #define XFS_TRANS_ATTR_FLAG             24
  89 #define XFS_TRANS_CLEAR_AGI_BUCKET      25
  90 #define XFS_TRANS_QM_SBCHANGE           26
  91 /*
  92  * Dummy entries since we use the transaction type to index into the
  93  * trans_type[] in xlog_recover_print_trans_head()
  94  */
  95 #define XFS_TRANS_DUMMY1                27
  96 #define XFS_TRANS_DUMMY2                28
  97 #define XFS_TRANS_QM_QUOTAOFF           29
  98 #define XFS_TRANS_QM_DQALLOC            30
  99 #define XFS_TRANS_QM_SETQLIM            31
 100 #define XFS_TRANS_QM_DQCLUSTER          32
 101 #define XFS_TRANS_QM_QINOCREATE         33
 102 #define XFS_TRANS_QM_QUOTAOFF_END       34
 103 #define XFS_TRANS_SB_UNIT               35
 104 #define XFS_TRANS_FSYNC_TS              36
 105 #define XFS_TRANS_GROWFSRT_ALLOC        37
 106 #define XFS_TRANS_GROWFSRT_ZERO         38
 107 #define XFS_TRANS_GROWFSRT_FREE         39
 108 #define XFS_TRANS_SWAPEXT               40
 109 #define XFS_TRANS_SB_COUNT              41
 110 #define XFS_TRANS_CHECKPOINT            42
 111 #define XFS_TRANS_ICREATE               43
 112 #define XFS_TRANS_TYPE_MAX              43
 113 /* new transaction types need to be reflected in xfs_logprint(8) */
 114
 115 #define XFS_TRANS_TYPES \
 116         { XFS_TRANS_SETATTR_NOT_SIZE,   "SETATTR_NOT_SIZE" }, \
 117         { XFS_TRANS_SETATTR_SIZE,       "SETATTR_SIZE" }, \
 118         { XFS_TRANS_INACTIVE,           "INACTIVE" }, \
 119         { XFS_TRANS_CREATE,             "CREATE" }, \
 120         { XFS_TRANS_CREATE_TRUNC,       "CREATE_TRUNC" }, \
 121         { XFS_TRANS_TRUNCATE_FILE,      "TRUNCATE_FILE" }, \
 122         { XFS_TRANS_REMOVE,             "REMOVE" }, \
 123         { XFS_TRANS_LINK,               "LINK" }, \
 124         { XFS_TRANS_RENAME,             "RENAME" }, \
 125         { XFS_TRANS_MKDIR,              "MKDIR" }, \
 126         { XFS_TRANS_RMDIR,              "RMDIR" }, \
 127         { XFS_TRANS_SYMLINK,            "SYMLINK" }, \
 128         { XFS_TRANS_SET_DMATTRS,        "SET_DMATTRS" }, \
 129         { XFS_TRANS_GROWFS,             "GROWFS" }, \
 130         { XFS_TRANS_STRAT_WRITE,        "STRAT_WRITE" }, \
 131         { XFS_TRANS_DIOSTRAT,           "DIOSTRAT" }, \
 132         { XFS_TRANS_WRITEID,            "WRITEID" }, \
 133         { XFS_TRANS_ADDAFORK,           "ADDAFORK" }, \
 134         { XFS_TRANS_ATTRINVAL,          "ATTRINVAL" }, \
 135         { XFS_TRANS_ATRUNCATE,          "ATRUNCATE" }, \
 136         { XFS_TRANS_ATTR_SET,           "ATTR_SET" }, \
 137         { XFS_TRANS_ATTR_RM,            "ATTR_RM" }, \
 138         { XFS_TRANS_ATTR_FLAG,          "ATTR_FLAG" }, \
 139         { XFS_TRANS_CLEAR_AGI_BUCKET,   "CLEAR_AGI_BUCKET" }, \
 140         { XFS_TRANS_QM_SBCHANGE,        "QM_SBCHANGE" }, \
 141         { XFS_TRANS_QM_QUOTAOFF,        "QM_QUOTAOFF" }, \
 142         { XFS_TRANS_QM_DQALLOC,         "QM_DQALLOC" }, \
 143         { XFS_TRANS_QM_SETQLIM,         "QM_SETQLIM" }, \
 144         { XFS_TRANS_QM_DQCLUSTER,       "QM_DQCLUSTER" }, \
 145         { XFS_TRANS_QM_QINOCREATE,      "QM_QINOCREATE" }, \
 146         { XFS_TRANS_QM_QUOTAOFF_END,    "QM_QOFF_END" }, \
 147         { XFS_TRANS_SB_UNIT,            "SB_UNIT" }, \
 148         { XFS_TRANS_FSYNC_TS,           "FSYNC_TS" }, \
 149         { XFS_TRANS_GROWFSRT_ALLOC,     "GROWFSRT_ALLOC" }, \
 150         { XFS_TRANS_GROWFSRT_ZERO,      "GROWFSRT_ZERO" }, \
 151         { XFS_TRANS_GROWFSRT_FREE,      "GROWFSRT_FREE" }, \
 152         { XFS_TRANS_SWAPEXT,            "SWAPEXT" }, \
 153         { XFS_TRANS_SB_COUNT,           "SB_COUNT" }, \
 154         { XFS_TRANS_CHECKPOINT,         "CHECKPOINT" }, \
 155         { XFS_TRANS_DUMMY1,             "DUMMY1" }, \
 156         { XFS_TRANS_DUMMY2,             "DUMMY2" }, \
 157         { XLOG_UNMOUNT_REC_TYPE,        "UNMOUNT" }
 158
 159 /*
 160  * This structure is used to track log items associated with
 161  * a transaction.  It points to the log item and keeps some
 162  * flags to track the state of the log item.  It also tracks
 163  * the amount of space needed to log the item it describes
 164  * once we get to commit processing (see xfs_trans_commit()).
 165  */
 166 struct xfs_log_item_desc {
 167         struct xfs_log_item     *lid_item;
 168         struct list_head        lid_trans;
 169         unsigned char           lid_flags;
 170 };
 171
 172 #define XFS_LID_DIRTY           0x1
 173
 174 #define XFS_TRANS_MAGIC         0x5452414E      /* 'TRAN' */
 175 /*
 176  * Values for t_flags.
 177  */
 178 #define XFS_TRANS_DIRTY         0x01    /* something needs to be logged */
 179 #define XFS_TRANS_SB_DIRTY      0x02    /* superblock is modified */
 180 #define XFS_TRANS_PERM_LOG_RES  0x04    /* xact took a permanent log res */
 181 #define XFS_TRANS_SYNC          0x08    /* make commit synchronous */
 182 #define XFS_TRANS_DQ_DIRTY      0x10    /* at least one dquot in trx dirty */
 183 #define XFS_TRANS_RESERVE       0x20    /* OK to use reserved data blocks */
 184 #define XFS_TRANS_FREEZE_PROT   0x40    /* Transaction has elevated writer
 185                                            count in superblock */
 186
 187 /*
 188  * Values for call flags parameter.
 189  */
 190 #define XFS_TRANS_RELEASE_LOG_RES       0x4
 191 #define XFS_TRANS_ABORT                 0x8
 192
 193 /*
 194  * Field values for xfs_trans_mod_sb.
 195  */
 196 #define XFS_TRANS_SB_ICOUNT             0x00000001
 197 #define XFS_TRANS_SB_IFREE              0x00000002
 198 #define XFS_TRANS_SB_FDBLOCKS           0x00000004
 199 #define XFS_TRANS_SB_RES_FDBLOCKS       0x00000008
 200 #define XFS_TRANS_SB_FREXTENTS          0x00000010
 201 #define XFS_TRANS_SB_RES_FREXTENTS      0x00000020
 202 #define XFS_TRANS_SB_DBLOCKS            0x00000040
 203 #define XFS_TRANS_SB_AGCOUNT            0x00000080
 204 #define XFS_TRANS_SB_IMAXPCT            0x00000100
 205 #define XFS_TRANS_SB_REXTSIZE           0x00000200
 206 #define XFS_TRANS_SB_RBMBLOCKS          0x00000400
 207 #define XFS_TRANS_SB_RBLOCKS            0x00000800
 208 #define XFS_TRANS_SB_REXTENTS           0x00001000
 209 #define XFS_TRANS_SB_REXTSLOG           0x00002000
 210
 211
 212 /*
 213  * Per-extent log reservation for the allocation btree changes
 214  * involved in freeing or allocating an extent.
 215  * 2 trees * (2 blocks/level * max depth - 1)
 216  */
 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)
 223  * bmap btree: (levels + 2) * max depth
 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_COUNT(mp) \
 228         (XFS_DAENTER_BLOCKS(mp, XFS_DATA_FORK) + \
 229          XFS_DAENTER_BMAPS(mp, XFS_DATA_FORK) + 1)
 230
 231
 232 #define XFS_WRITE_LOG_RES(mp)   ((mp)->m_reservations.tr_write)
 233 #define XFS_ITRUNCATE_LOG_RES(mp)   ((mp)->m_reservations.tr_itruncate)
 234 #define XFS_RENAME_LOG_RES(mp)  ((mp)->m_reservations.tr_rename)
 235 #define XFS_LINK_LOG_RES(mp)    ((mp)->m_reservations.tr_link)
 236 #define XFS_REMOVE_LOG_RES(mp)  ((mp)->m_reservations.tr_remove)
 237 #define XFS_SYMLINK_LOG_RES(mp) ((mp)->m_reservations.tr_symlink)
 238 #define XFS_CREATE_LOG_RES(mp)  ((mp)->m_reservations.tr_create)
 239 #define XFS_MKDIR_LOG_RES(mp)   ((mp)->m_reservations.tr_mkdir)
 240 #define XFS_IFREE_LOG_RES(mp)   ((mp)->m_reservations.tr_ifree)
 241 #define XFS_ICHANGE_LOG_RES(mp) ((mp)->m_reservations.tr_ichange)
 242 #define XFS_GROWDATA_LOG_RES(mp)    ((mp)->m_reservations.tr_growdata)
 243 #define XFS_GROWRTALLOC_LOG_RES(mp)     ((mp)->m_reservations.tr_growrtalloc)
 244 #define XFS_GROWRTZERO_LOG_RES(mp)      ((mp)->m_reservations.tr_growrtzero)
 245 #define XFS_GROWRTFREE_LOG_RES(mp)      ((mp)->m_reservations.tr_growrtfree)
 246 #define XFS_SWRITE_LOG_RES(mp)  ((mp)->m_reservations.tr_swrite)
 247 /*
 248  * Logging the inode timestamps on an fsync -- same as SWRITE
 249  * as long as SWRITE logs the entire inode core
 250  */
 251 #define XFS_FSYNC_TS_LOG_RES(mp)        ((mp)->m_reservations.tr_swrite)
 252 #define XFS_WRITEID_LOG_RES(mp)         ((mp)->m_reservations.tr_swrite)
 253 #define XFS_ADDAFORK_LOG_RES(mp)        ((mp)->m_reservations.tr_addafork)
 254 #define XFS_ATTRINVAL_LOG_RES(mp)       ((mp)->m_reservations.tr_attrinval)
 255 #define XFS_ATTRSETM_LOG_RES(mp)        ((mp)->m_reservations.tr_attrsetm)
 256 #define XFS_ATTRSETRT_LOG_RES(mp)       ((mp)->m_reservations.tr_attrsetrt)
 257 #define XFS_ATTRRM_LOG_RES(mp)          ((mp)->m_reservations.tr_attrrm)
 258 #define XFS_CLEAR_AGI_BUCKET_LOG_RES(mp)  ((mp)->m_reservations.tr_clearagi)
 259 #define XFS_QM_SBCHANGE_LOG_RES(mp)     ((mp)->m_reservations.tr_qm_sbchange)
 260 #define XFS_QM_SETQLIM_LOG_RES(mp)      ((mp)->m_reservations.tr_qm_setqlim)
 261 #define XFS_QM_DQALLOC_LOG_RES(mp)      ((mp)->m_reservations.tr_qm_dqalloc)
 262 #define XFS_QM_QUOTAOFF_LOG_RES(mp)     ((mp)->m_reservations.tr_qm_quotaoff)
 263 #define XFS_QM_QUOTAOFF_END_LOG_RES(mp) ((mp)->m_reservations.tr_qm_equotaoff)
 264 #define XFS_SB_LOG_RES(mp)              ((mp)->m_reservations.tr_sb)
 265
 266 /*
 267  * Various log count values.
 268  */
 269 #define XFS_DEFAULT_LOG_COUNT           1
 270 #define XFS_DEFAULT_PERM_LOG_COUNT      2
 271 #define XFS_ITRUNCATE_LOG_COUNT         2
 272 #define XFS_INACTIVE_LOG_COUNT          2
 273 #define XFS_CREATE_LOG_COUNT            2
 274 #define XFS_MKDIR_LOG_COUNT             3
 275 #define XFS_SYMLINK_LOG_COUNT           3
 276 #define XFS_REMOVE_LOG_COUNT            2
 277 #define XFS_LINK_LOG_COUNT              2
 278 #define XFS_RENAME_LOG_COUNT            2
 279 #define XFS_WRITE_LOG_COUNT             2
 280 #define XFS_ADDAFORK_LOG_COUNT          2
 281 #define XFS_ATTRINVAL_LOG_COUNT         1
 282 #define XFS_ATTRSET_LOG_COUNT           3
 283 #define XFS_ATTRRM_LOG_COUNT            3
 284
 285 /*
 286  * Here we centralize the specification of XFS meta-data buffer
 287  * reference count values.  This determine how hard the buffer
 288  * cache tries to hold onto the buffer.
 289  */
 290 #define XFS_AGF_REF             4
 291 #define XFS_AGI_REF             4
 292 #define XFS_AGFL_REF            3
 293 #define XFS_INO_BTREE_REF       3
 294 #define XFS_ALLOC_BTREE_REF     2
 295 #define XFS_BMAP_BTREE_REF      2
 296 #define XFS_DIR_BTREE_REF       2
 297 #define XFS_INO_REF             2
 298 #define XFS_ATTR_BTREE_REF      1
 299 #define XFS_DQUOT_REF           1
 300
 301 #ifdef __KERNEL__
 302
 303 struct xfs_buf;
 304 struct xfs_buftarg;
 305 struct xfs_efd_log_item;
 306 struct xfs_efi_log_item;
 307 struct xfs_inode;
 308 struct xfs_item_ops;
 309 struct xfs_log_iovec;
 310 struct xfs_log_item_desc;
 311 struct xfs_mount;
 312 struct xfs_trans;
 313 struct xfs_dquot_acct;
 314 struct xfs_busy_extent;
 315
 316 typedef struct xfs_log_item {
 317         struct list_head                li_ail;         /* AIL pointers */
 318         xfs_lsn_t                       li_lsn;         /* last on-disk lsn */
 319         struct xfs_log_item_desc        *li_desc;       /* ptr to current desc*/
 320         struct xfs_mount                *li_mountp;     /* ptr to fs mount */
 321         struct xfs_ail                  *li_ailp;       /* ptr to AIL */
 322         uint                            li_type;        /* item type */
 323         uint                            li_flags;       /* misc flags */
 324         struct xfs_log_item             *li_bio_list;   /* buffer item list */
 325         void                            (*li_cb)(struct xfs_buf *,
 326                                                  struct xfs_log_item *);
 327                                                         /* buffer item iodone */
 328                                                         /* callback func */
 329         const struct xfs_item_ops       *li_ops;        /* function list */
 330
 331         /* delayed logging */
 332         struct list_head                li_cil;         /* CIL pointers */
 333         struct xfs_log_vec              *li_lv;         /* active log vector */
 334         xfs_lsn_t                       li_seq;         /* CIL commit seq */
 335 } xfs_log_item_t;
 336
 337 #define XFS_LI_IN_AIL   0x1
 338 #define XFS_LI_ABORTED  0x2
 339
 340 #define XFS_LI_FLAGS \
 341         { XFS_LI_IN_AIL,        "IN_AIL" }, \
 342         { XFS_LI_ABORTED,       "ABORTED" }
 343
 344 struct xfs_item_ops {
 345         uint (*iop_size)(xfs_log_item_t *);
 346         void (*iop_format)(xfs_log_item_t *, struct xfs_log_iovec *);
 347         void (*iop_pin)(xfs_log_item_t *);
 348         void (*iop_unpin)(xfs_log_item_t *, int remove);
 349         uint (*iop_push)(struct xfs_log_item *, struct list_head *);
 350         void (*iop_unlock)(xfs_log_item_t *);
 351         xfs_lsn_t (*iop_committed)(xfs_log_item_t *, xfs_lsn_t);
 352         void (*iop_committing)(xfs_log_item_t *, xfs_lsn_t);
 353 };
 354
 355 #define IOP_SIZE(ip)            (*(ip)->li_ops->iop_size)(ip)
 356 #define IOP_FORMAT(ip,vp)       (*(ip)->li_ops->iop_format)(ip, vp)
 357 #define IOP_PIN(ip)             (*(ip)->li_ops->iop_pin)(ip)
 358 #define IOP_UNPIN(ip, remove)   (*(ip)->li_ops->iop_unpin)(ip, remove)
 359 #define IOP_PUSH(ip, list)      (*(ip)->li_ops->iop_push)(ip, list)
 360 #define IOP_UNLOCK(ip)          (*(ip)->li_ops->iop_unlock)(ip)
 361 #define IOP_COMMITTED(ip, lsn)  (*(ip)->li_ops->iop_committed)(ip, lsn)
 362 #define IOP_COMMITTING(ip, lsn) (*(ip)->li_ops->iop_committing)(ip, lsn)
 363
 364 /*
 365  * Return values for the IOP_PUSH() routines.
 366  */
 367 #define XFS_ITEM_SUCCESS        0
 368 #define XFS_ITEM_PINNED         1
 369 #define XFS_ITEM_LOCKED         2
 370 #define XFS_ITEM_FLUSHING       3
 371
 372 /*
 373  * This is the type of function which can be given to xfs_trans_callback()
 374  * to be called upon the transaction's commit to disk.
 375  */
 376 typedef void (*xfs_trans_callback_t)(struct xfs_trans *, void *);
 377
 378 /*
 379  * This is the structure maintained for every active transaction.
 380  */
 381 typedef struct xfs_trans {
 382         unsigned int            t_magic;        /* magic number */
 383         xfs_log_callback_t      t_logcb;        /* log callback struct */
 384         unsigned int            t_type;         /* transaction type */
 385         unsigned int            t_log_res;      /* amt of log space resvd */
 386         unsigned int            t_log_count;    /* count for perm log res */
 387         unsigned int            t_blk_res;      /* # of blocks resvd */
 388         unsigned int            t_blk_res_used; /* # of resvd blocks used */
 389         unsigned int            t_rtx_res;      /* # of rt extents resvd */
 390         unsigned int            t_rtx_res_used; /* # of resvd rt extents used */
 391         struct xlog_ticket      *t_ticket;      /* log mgr ticket */
 392         xfs_lsn_t               t_lsn;          /* log seq num of start of
 393                                                  * transaction. */
 394         xfs_lsn_t               t_commit_lsn;   /* log seq num of end of
 395                                                  * transaction. */
 396         struct xfs_mount        *t_mountp;      /* ptr to fs mount struct */
 397         struct xfs_dquot_acct   *t_dqinfo;      /* acctg info for dquots */
 398         unsigned int            t_flags;        /* misc flags */
 399         int64_t                 t_icount_delta; /* superblock icount change */
 400         int64_t                 t_ifree_delta;  /* superblock ifree change */
 401         int64_t                 t_fdblocks_delta; /* superblock fdblocks chg */
 402         int64_t                 t_res_fdblocks_delta; /* on-disk only chg */
 403         int64_t                 t_frextents_delta;/* superblock freextents chg*/
 404         int64_t                 t_res_frextents_delta; /* on-disk only chg */
 405 #if defined(DEBUG) || defined(XFS_WARN)
 406         int64_t                 t_ag_freeblks_delta; /* debugging counter */
 407         int64_t                 t_ag_flist_delta; /* debugging counter */
 408         int64_t                 t_ag_btree_delta; /* debugging counter */
 409 #endif
 410         int64_t                 t_dblocks_delta;/* superblock dblocks change */
 411         int64_t                 t_agcount_delta;/* superblock agcount change */
 412         int64_t                 t_imaxpct_delta;/* superblock imaxpct change */
 413         int64_t                 t_rextsize_delta;/* superblock rextsize chg */
 414         int64_t                 t_rbmblocks_delta;/* superblock rbmblocks chg */
 415         int64_t                 t_rblocks_delta;/* superblock rblocks change */
 416         int64_t                 t_rextents_delta;/* superblocks rextents chg */
 417         int64_t                 t_rextslog_delta;/* superblocks rextslog chg */
 418         struct list_head        t_items;        /* log item descriptors */
 419         xfs_trans_header_t      t_header;       /* header for in-log trans */
 420         struct list_head        t_busy;         /* list of busy extents */
 421         unsigned long           t_pflags;       /* saved process flags state */
 422 } xfs_trans_t;
 423
 424 /*
 425  * XFS transaction mechanism exported interfaces that are
 426  * actually macros.
 427  */
 428 #define xfs_trans_get_log_res(tp)       ((tp)->t_log_res)
 429 #define xfs_trans_get_log_count(tp)     ((tp)->t_log_count)
 430 #define xfs_trans_get_block_res(tp)     ((tp)->t_blk_res)
 431 #define xfs_trans_set_sync(tp)          ((tp)->t_flags |= XFS_TRANS_SYNC)
 432
 433 #if defined(DEBUG) || defined(XFS_WARN)
 434 #define xfs_trans_agblocks_delta(tp, d) ((tp)->t_ag_freeblks_delta += (int64_t)d)
 435 #define xfs_trans_agflist_delta(tp, d)  ((tp)->t_ag_flist_delta += (int64_t)d)
 436 #define xfs_trans_agbtree_delta(tp, d)  ((tp)->t_ag_btree_delta += (int64_t)d)
 437 #else
 438 #define xfs_trans_agblocks_delta(tp, d)
 439 #define xfs_trans_agflist_delta(tp, d)
 440 #define xfs_trans_agbtree_delta(tp, d)
 441 #endif
 442
 443 /*
 444  * XFS transaction mechanism exported interfaces.
 445  */
 446 xfs_trans_t     *xfs_trans_alloc(struct xfs_mount *, uint);
 447 xfs_trans_t     *_xfs_trans_alloc(struct xfs_mount *, uint, xfs_km_flags_t);
 448 xfs_trans_t     *xfs_trans_dup(xfs_trans_t *);
 449 int             xfs_trans_reserve(xfs_trans_t *, uint, uint, uint,
 450                                   uint, uint);
 451 void            xfs_trans_mod_sb(xfs_trans_t *, uint, int64_t);
 452
 453 struct xfs_buf  *xfs_trans_get_buf_map(struct xfs_trans *tp,
 454                                        struct xfs_buftarg *target,
 455                                        struct xfs_buf_map *map, int nmaps,
 456                                        uint flags);
 457
 458 static inline struct xfs_buf *
 459 xfs_trans_get_buf(
 460         struct xfs_trans        *tp,
 461         struct xfs_buftarg      *target,
 462         xfs_daddr_t             blkno,
 463         int                     numblks,
 464         uint                    flags)
 465 {
 466         DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
 467         return xfs_trans_get_buf_map(tp, target, &map, 1, flags);
 468 }
 469
 470 int             xfs_trans_read_buf_map(struct xfs_mount *mp,
 471                                        struct xfs_trans *tp,
 472                                        struct xfs_buftarg *target,
 473                                        struct xfs_buf_map *map, int nmaps,
 474                                        xfs_buf_flags_t flags,
 475                                        struct xfs_buf **bpp,
 476                                        const struct xfs_buf_ops *ops);
 477
 478 static inline int
 479 xfs_trans_read_buf(
 480         struct xfs_mount        *mp,
 481         struct xfs_trans        *tp,
 482         struct xfs_buftarg      *target,
 483         xfs_daddr_t             blkno,
 484         int                     numblks,
 485         xfs_buf_flags_t         flags,
 486         struct xfs_buf          **bpp,
 487         const struct xfs_buf_ops *ops)
 488 {
 489         DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
 490         return xfs_trans_read_buf_map(mp, tp, target, &map, 1,
 491                                       flags, bpp, ops);
 492 }
 493
 494 struct xfs_buf  *xfs_trans_getsb(xfs_trans_t *, struct xfs_mount *, int);
 495
 496 void            xfs_trans_brelse(xfs_trans_t *, struct xfs_buf *);
 497 void            xfs_trans_bjoin(xfs_trans_t *, struct xfs_buf *);
 498 void            xfs_trans_bhold(xfs_trans_t *, struct xfs_buf *);
 499 void            xfs_trans_bhold_release(xfs_trans_t *, struct xfs_buf *);
 500 void            xfs_trans_binval(xfs_trans_t *, struct xfs_buf *);
 501 void            xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *);
 502 void            xfs_trans_stale_inode_buf(xfs_trans_t *, struct xfs_buf *);
 503 void            xfs_trans_ordered_buf(xfs_trans_t *, struct xfs_buf *);
 504 void            xfs_trans_dquot_buf(xfs_trans_t *, struct xfs_buf *, uint);
 505 void            xfs_trans_inode_alloc_buf(xfs_trans_t *, struct xfs_buf *);
 506 void            xfs_trans_ichgtime(struct xfs_trans *, struct xfs_inode *, int);
 507 void            xfs_trans_ijoin(struct xfs_trans *, struct xfs_inode *, uint);
 508 void            xfs_trans_log_buf(xfs_trans_t *, struct xfs_buf *, uint, uint);
 509 void            xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint);
 510 struct xfs_efi_log_item *xfs_trans_get_efi(xfs_trans_t *, uint);
 511 void            xfs_efi_release(struct xfs_efi_log_item *, uint);
 512 void            xfs_trans_log_efi_extent(xfs_trans_t *,
 513                                          struct xfs_efi_log_item *,
 514                                          xfs_fsblock_t,
 515                                          xfs_extlen_t);
 516 struct xfs_efd_log_item *xfs_trans_get_efd(xfs_trans_t *,
 517                                   struct xfs_efi_log_item *,
 518                                   uint);
 519 void            xfs_trans_log_efd_extent(xfs_trans_t *,
 520                                          struct xfs_efd_log_item *,
 521                                          xfs_fsblock_t,
 522                                          xfs_extlen_t);
 523 int             xfs_trans_commit(xfs_trans_t *, uint flags);
 524 void            xfs_trans_cancel(xfs_trans_t *, int);
 525 int             xfs_trans_ail_init(struct xfs_mount *);
 526 void            xfs_trans_ail_destroy(struct xfs_mount *);
 527
 528 extern kmem_zone_t      *xfs_trans_zone;
 529 extern kmem_zone_t      *xfs_log_item_desc_zone;
 530
 531 #endif  /* __KERNEL__ */
 532
 533 void            xfs_trans_init(struct xfs_mount *);
 534 int             xfs_trans_roll(struct xfs_trans **, struct xfs_inode *);
 535
 536 #endif  /* __XFS_TRANS_H__ */