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
  52 /*
  53  * Transaction types.  Used to distinguish types of buffers.
  54  */
  55 #define XFS_TRANS_SETATTR_NOT_SIZE      1
  56 #define XFS_TRANS_SETATTR_SIZE          2
  57 #define XFS_TRANS_INACTIVE              3
  58 #define XFS_TRANS_CREATE                4
  59 #define XFS_TRANS_CREATE_TRUNC          5
  60 #define XFS_TRANS_TRUNCATE_FILE         6
  61 #define XFS_TRANS_REMOVE                7
  62 #define XFS_TRANS_LINK                  8
  63 #define XFS_TRANS_RENAME                9
  64 #define XFS_TRANS_MKDIR                 10
  65 #define XFS_TRANS_RMDIR                 11
  66 #define XFS_TRANS_SYMLINK               12
  67 #define XFS_TRANS_SET_DMATTRS           13
  68 #define XFS_TRANS_GROWFS                14
  69 #define XFS_TRANS_STRAT_WRITE           15
  70 #define XFS_TRANS_DIOSTRAT              16
  71 /* 17 was XFS_TRANS_WRITE_SYNC */
  72 #define XFS_TRANS_WRITEID               18
  73 #define XFS_TRANS_ADDAFORK              19
  74 #define XFS_TRANS_ATTRINVAL             20
  75 #define XFS_TRANS_ATRUNCATE             21
  76 #define XFS_TRANS_ATTR_SET              22
  77 #define XFS_TRANS_ATTR_RM               23
  78 #define XFS_TRANS_ATTR_FLAG             24
  79 #define XFS_TRANS_CLEAR_AGI_BUCKET      25
  80 #define XFS_TRANS_QM_SBCHANGE           26
  81 /*
  82  * Dummy entries since we use the transaction type to index into the
  83  * trans_type[] in xlog_recover_print_trans_head()
  84  */
  85 #define XFS_TRANS_DUMMY1                27
  86 #define XFS_TRANS_DUMMY2                28
  87 #define XFS_TRANS_QM_QUOTAOFF           29
  88 #define XFS_TRANS_QM_DQALLOC            30
  89 #define XFS_TRANS_QM_SETQLIM            31
  90 #define XFS_TRANS_QM_DQCLUSTER          32
  91 #define XFS_TRANS_QM_QINOCREATE         33
  92 #define XFS_TRANS_QM_QUOTAOFF_END       34
  93 #define XFS_TRANS_SB_UNIT               35
  94 #define XFS_TRANS_FSYNC_TS              36
  95 #define XFS_TRANS_GROWFSRT_ALLOC        37
  96 #define XFS_TRANS_GROWFSRT_ZERO         38
  97 #define XFS_TRANS_GROWFSRT_FREE         39
  98 #define XFS_TRANS_SWAPEXT               40
  99 #define XFS_TRANS_SB_COUNT              41
 100 #define XFS_TRANS_TYPE_MAX              41
 101 /* new transaction types need to be reflected in xfs_logprint(8) */
 102
 103 /*
 104  * This structure is used to track log items associated with
 105  * a transaction.  It points to the log item and keeps some
 106  * flags to track the state of the log item.  It also tracks
 107  * the amount of space needed to log the item it describes
 108  * once we get to commit processing (see xfs_trans_commit()).
 109  */
 110 typedef struct xfs_log_item_desc {
 111         struct xfs_log_item     *lid_item;
 112         ushort          lid_size;
 113         unsigned char   lid_flags;
 114         unsigned char   lid_index;
 115 } xfs_log_item_desc_t;
 116
 117 #define XFS_LID_DIRTY           0x1
 118 #define XFS_LID_PINNED          0x2
 119 #define XFS_LID_BUF_STALE       0x8
 120
 121 /*
 122  * This structure is used to maintain a chunk list of log_item_desc
 123  * structures. The free field is a bitmask indicating which descriptors
 124  * in this chunk's array are free.  The unused field is the first value
 125  * not used since this chunk was allocated.
 126  */
 127 #define XFS_LIC_NUM_SLOTS       15
 128 typedef struct xfs_log_item_chunk {
 129         struct xfs_log_item_chunk       *lic_next;
 130         ushort                          lic_free;
 131         ushort                          lic_unused;
 132         xfs_log_item_desc_t             lic_descs[XFS_LIC_NUM_SLOTS];
 133 } xfs_log_item_chunk_t;
 134
 135 #define XFS_LIC_MAX_SLOT        (XFS_LIC_NUM_SLOTS - 1)
 136 #define XFS_LIC_FREEMASK        ((1 << XFS_LIC_NUM_SLOTS) - 1)
 137
 138
 139 /*
 140  * Initialize the given chunk.  Set the chunk's free descriptor mask
 141  * to indicate that all descriptors are free.  The caller gets to set
 142  * lic_unused to the right value (0 matches all free).  The
 143  * lic_descs.lid_index values are set up as each desc is allocated.
 144  */
 145 static inline void xfs_lic_init(xfs_log_item_chunk_t *cp)
 146 {
 147         cp->lic_free = XFS_LIC_FREEMASK;
 148 }
 149
 150 static inline void xfs_lic_init_slot(xfs_log_item_chunk_t *cp, int slot)
 151 {
 152         cp->lic_descs[slot].lid_index = (unsigned char)(slot);
 153 }
 154
 155 static inline int xfs_lic_vacancy(xfs_log_item_chunk_t *cp)
 156 {
 157         return cp->lic_free & XFS_LIC_FREEMASK;
 158 }
 159
 160 static inline void xfs_lic_all_free(xfs_log_item_chunk_t *cp)
 161 {
 162         cp->lic_free = XFS_LIC_FREEMASK;
 163 }
 164
 165 static inline int xfs_lic_are_all_free(xfs_log_item_chunk_t *cp)
 166 {
 167         return ((cp->lic_free & XFS_LIC_FREEMASK) == XFS_LIC_FREEMASK);
 168 }
 169
 170 static inline int xfs_lic_isfree(xfs_log_item_chunk_t *cp, int slot)
 171 {
 172         return (cp->lic_free & (1 << slot));
 173 }
 174
 175 static inline void xfs_lic_claim(xfs_log_item_chunk_t *cp, int slot)
 176 {
 177         cp->lic_free &= ~(1 << slot);
 178 }
 179
 180 static inline void xfs_lic_relse(xfs_log_item_chunk_t *cp, int slot)
 181 {
 182         cp->lic_free |= 1 << slot;
 183 }
 184
 185 static inline xfs_log_item_desc_t *
 186 xfs_lic_slot(xfs_log_item_chunk_t *cp, int slot)
 187 {
 188         return &(cp->lic_descs[slot]);
 189 }
 190
 191 static inline int xfs_lic_desc_to_slot(xfs_log_item_desc_t *dp)
 192 {
 193         return (uint)dp->lid_index;
 194 }
 195
 196 /*
 197  * Calculate the address of a chunk given a descriptor pointer:
 198  * dp - dp->lid_index give the address of the start of the lic_descs array.
 199  * From this we subtract the offset of the lic_descs field in a chunk.
 200  * All of this yields the address of the chunk, which is
 201  * cast to a chunk pointer.
 202  */
 203 static inline xfs_log_item_chunk_t *
 204 xfs_lic_desc_to_chunk(xfs_log_item_desc_t *dp)
 205 {
 206         return (xfs_log_item_chunk_t*) \
 207                 (((xfs_caddr_t)((dp) - (dp)->lid_index)) - \
 208                 (xfs_caddr_t)(((xfs_log_item_chunk_t*)0)->lic_descs));
 209 }
 210
 211 #define XFS_TRANS_MAGIC         0x5452414E      /* 'TRAN' */
 212 /*
 213  * Values for t_flags.
 214  */
 215 #define XFS_TRANS_DIRTY         0x01    /* something needs to be logged */
 216 #define XFS_TRANS_SB_DIRTY      0x02    /* superblock is modified */
 217 #define XFS_TRANS_PERM_LOG_RES  0x04    /* xact took a permanent log res */
 218 #define XFS_TRANS_SYNC          0x08    /* make commit synchronous */
 219 #define XFS_TRANS_DQ_DIRTY      0x10    /* at least one dquot in trx dirty */
 220 #define XFS_TRANS_RESERVE       0x20    /* OK to use reserved data blocks */
 221
 222 /*
 223  * Values for call flags parameter.
 224  */
 225 #define XFS_TRANS_NOSLEEP               0x1
 226 #define XFS_TRANS_WAIT                  0x2
 227 #define XFS_TRANS_RELEASE_LOG_RES       0x4
 228 #define XFS_TRANS_ABORT                 0x8
 229
 230 /*
 231  * Field values for xfs_trans_mod_sb.
 232  */
 233 #define XFS_TRANS_SB_ICOUNT             0x00000001
 234 #define XFS_TRANS_SB_IFREE              0x00000002
 235 #define XFS_TRANS_SB_FDBLOCKS           0x00000004
 236 #define XFS_TRANS_SB_RES_FDBLOCKS       0x00000008
 237 #define XFS_TRANS_SB_FREXTENTS          0x00000010
 238 #define XFS_TRANS_SB_RES_FREXTENTS      0x00000020
 239 #define XFS_TRANS_SB_DBLOCKS            0x00000040
 240 #define XFS_TRANS_SB_AGCOUNT            0x00000080
 241 #define XFS_TRANS_SB_IMAXPCT            0x00000100
 242 #define XFS_TRANS_SB_REXTSIZE           0x00000200
 243 #define XFS_TRANS_SB_RBMBLOCKS          0x00000400
 244 #define XFS_TRANS_SB_RBLOCKS            0x00000800
 245 #define XFS_TRANS_SB_REXTENTS           0x00001000
 246 #define XFS_TRANS_SB_REXTSLOG           0x00002000
 247
 248
 249 /*
 250  * Various log reservation values.
 251  * These are based on the size of the file system block
 252  * because that is what most transactions manipulate.
 253  * Each adds in an additional 128 bytes per item logged to
 254  * try to account for the overhead of the transaction mechanism.
 255  *
 256  * Note:
 257  * Most of the reservations underestimate the number of allocation
 258  * groups into which they could free extents in the xfs_bmap_finish()
 259  * call.  This is because the number in the worst case is quite high
 260  * and quite unusual.  In order to fix this we need to change
 261  * xfs_bmap_finish() to free extents in only a single AG at a time.
 262  * This will require changes to the EFI code as well, however, so that
 263  * the EFI for the extents not freed is logged again in each transaction.
 264  * See bug 261917.
 265  */
 266
 267 /*
 268  * Per-extent log reservation for the allocation btree changes
 269  * involved in freeing or allocating an extent.
 270  * 2 trees * (2 blocks/level * max depth - 1) * block size
 271  */
 272 #define XFS_ALLOCFREE_LOG_RES(mp,nx) \
 273         ((nx) * (2 * XFS_FSB_TO_B((mp), 2 * XFS_AG_MAXLEVELS(mp) - 1)))
 274 #define XFS_ALLOCFREE_LOG_COUNT(mp,nx) \
 275         ((nx) * (2 * (2 * XFS_AG_MAXLEVELS(mp) - 1)))
 276
 277 /*
 278  * Per-directory log reservation for any directory change.
 279  * dir blocks: (1 btree block per level + data block + free block) * dblock size
 280  * bmap btree: (levels + 2) * max depth * block size
 281  * v2 directory blocks can be fragmented below the dirblksize down to the fsb
 282  * size, so account for that in the DAENTER macros.
 283  */
 284 #define XFS_DIROP_LOG_RES(mp)   \
 285         (XFS_FSB_TO_B(mp, XFS_DAENTER_BLOCKS(mp, XFS_DATA_FORK)) + \
 286          (XFS_FSB_TO_B(mp, XFS_DAENTER_BMAPS(mp, XFS_DATA_FORK) + 1)))
 287 #define XFS_DIROP_LOG_COUNT(mp) \
 288         (XFS_DAENTER_BLOCKS(mp, XFS_DATA_FORK) + \
 289          XFS_DAENTER_BMAPS(mp, XFS_DATA_FORK) + 1)
 290
 291 /*
 292  * In a write transaction we can allocate a maximum of 2
 293  * extents.  This gives:
 294  *    the inode getting the new extents: inode size
 295  *    the inode's bmap btree: max depth * block size
 296  *    the agfs of the ags from which the extents are allocated: 2 * sector
 297  *    the superblock free block counter: sector size
 298  *    the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size
 299  * And the bmap_finish transaction can free bmap blocks in a join:
 300  *    the agfs of the ags containing the blocks: 2 * sector size
 301  *    the agfls of the ags containing the blocks: 2 * sector size
 302  *    the super block free block counter: sector size
 303  *    the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size
 304  */
 305 #define XFS_CALC_WRITE_LOG_RES(mp) \
 306         (MAX( \
 307          ((mp)->m_sb.sb_inodesize + \
 308           XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK)) + \
 309           (2 * (mp)->m_sb.sb_sectsize) + \
 310           (mp)->m_sb.sb_sectsize + \
 311           XFS_ALLOCFREE_LOG_RES(mp, 2) + \
 312           (128 * (4 + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) + XFS_ALLOCFREE_LOG_COUNT(mp, 2)))),\
 313          ((2 * (mp)->m_sb.sb_sectsize) + \
 314           (2 * (mp)->m_sb.sb_sectsize) + \
 315           (mp)->m_sb.sb_sectsize + \
 316           XFS_ALLOCFREE_LOG_RES(mp, 2) + \
 317           (128 * (5 + XFS_ALLOCFREE_LOG_COUNT(mp, 2))))))
 318
 319 #define XFS_WRITE_LOG_RES(mp)   ((mp)->m_reservations.tr_write)
 320
 321 /*
 322  * In truncating a file we free up to two extents at once.  We can modify:
 323  *    the inode being truncated: inode size
 324  *    the inode's bmap btree: (max depth + 1) * block size
 325  * And the bmap_finish transaction can free the blocks and bmap blocks:
 326  *    the agf for each of the ags: 4 * sector size
 327  *    the agfl for each of the ags: 4 * sector size
 328  *    the super block to reflect the freed blocks: sector size
 329  *    worst case split in allocation btrees per extent assuming 4 extents:
 330  *              4 exts * 2 trees * (2 * max depth - 1) * block size
 331  *    the inode btree: max depth * blocksize
 332  *    the allocation btrees: 2 trees * (max depth - 1) * block size
 333  */
 334 #define XFS_CALC_ITRUNCATE_LOG_RES(mp) \
 335         (MAX( \
 336          ((mp)->m_sb.sb_inodesize + \
 337           XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) + 1) + \
 338           (128 * (2 + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK)))), \
 339          ((4 * (mp)->m_sb.sb_sectsize) + \
 340           (4 * (mp)->m_sb.sb_sectsize) + \
 341           (mp)->m_sb.sb_sectsize + \
 342           XFS_ALLOCFREE_LOG_RES(mp, 4) + \
 343           (128 * (9 + XFS_ALLOCFREE_LOG_COUNT(mp, 4))) + \
 344           (128 * 5) + \
 345           XFS_ALLOCFREE_LOG_RES(mp, 1) + \
 346            (128 * (2 + XFS_IALLOC_BLOCKS(mp) + (mp)->m_in_maxlevels + \
 347             XFS_ALLOCFREE_LOG_COUNT(mp, 1))))))
 348
 349 #define XFS_ITRUNCATE_LOG_RES(mp)   ((mp)->m_reservations.tr_itruncate)
 350
 351 /*
 352  * In renaming a files we can modify:
 353  *    the four inodes involved: 4 * inode size
 354  *    the two directory btrees: 2 * (max depth + v2) * dir block size
 355  *    the two directory bmap btrees: 2 * max depth * block size
 356  * And the bmap_finish transaction can free dir and bmap blocks (two sets
 357  *      of bmap blocks) giving:
 358  *    the agf for the ags in which the blocks live: 3 * sector size
 359  *    the agfl for the ags in which the blocks live: 3 * sector size
 360  *    the superblock for the free block count: sector size
 361  *    the allocation btrees: 3 exts * 2 trees * (2 * max depth - 1) * block size
 362  */
 363 #define XFS_CALC_RENAME_LOG_RES(mp) \
 364         (MAX( \
 365          ((4 * (mp)->m_sb.sb_inodesize) + \
 366           (2 * XFS_DIROP_LOG_RES(mp)) + \
 367           (128 * (4 + 2 * XFS_DIROP_LOG_COUNT(mp)))), \
 368          ((3 * (mp)->m_sb.sb_sectsize) + \
 369           (3 * (mp)->m_sb.sb_sectsize) + \
 370           (mp)->m_sb.sb_sectsize + \
 371           XFS_ALLOCFREE_LOG_RES(mp, 3) + \
 372           (128 * (7 + XFS_ALLOCFREE_LOG_COUNT(mp, 3))))))
 373
 374 #define XFS_RENAME_LOG_RES(mp)  ((mp)->m_reservations.tr_rename)
 375
 376 /*
 377  * For creating a link to an inode:
 378  *    the parent directory inode: inode size
 379  *    the linked inode: inode size
 380  *    the directory btree could split: (max depth + v2) * dir block size
 381  *    the directory bmap btree could join or split: (max depth + v2) * blocksize
 382  * And the bmap_finish transaction can free some bmap blocks giving:
 383  *    the agf for the ag in which the blocks live: sector size
 384  *    the agfl for the ag in which the blocks live: sector size
 385  *    the superblock for the free block count: sector size
 386  *    the allocation btrees: 2 trees * (2 * max depth - 1) * block size
 387  */
 388 #define XFS_CALC_LINK_LOG_RES(mp) \
 389         (MAX( \
 390          ((mp)->m_sb.sb_inodesize + \
 391           (mp)->m_sb.sb_inodesize + \
 392           XFS_DIROP_LOG_RES(mp) + \
 393           (128 * (2 + XFS_DIROP_LOG_COUNT(mp)))), \
 394          ((mp)->m_sb.sb_sectsize + \
 395           (mp)->m_sb.sb_sectsize + \
 396           (mp)->m_sb.sb_sectsize + \
 397           XFS_ALLOCFREE_LOG_RES(mp, 1) + \
 398           (128 * (3 + XFS_ALLOCFREE_LOG_COUNT(mp, 1))))))
 399
 400 #define XFS_LINK_LOG_RES(mp)    ((mp)->m_reservations.tr_link)
 401
 402 /*
 403  * For removing a directory entry we can modify:
 404  *    the parent directory inode: inode size
 405  *    the removed inode: inode size
 406  *    the directory btree could join: (max depth + v2) * dir block size
 407  *    the directory bmap btree could join or split: (max depth + v2) * blocksize
 408  * And the bmap_finish transaction can free the dir and bmap blocks giving:
 409  *    the agf for the ag in which the blocks live: 2 * sector size
 410  *    the agfl for the ag in which the blocks live: 2 * sector size
 411  *    the superblock for the free block count: sector size
 412  *    the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size
 413  */
 414 #define XFS_CALC_REMOVE_LOG_RES(mp)     \
 415         (MAX( \
 416          ((mp)->m_sb.sb_inodesize + \
 417           (mp)->m_sb.sb_inodesize + \
 418           XFS_DIROP_LOG_RES(mp) + \
 419           (128 * (2 + XFS_DIROP_LOG_COUNT(mp)))), \
 420          ((2 * (mp)->m_sb.sb_sectsize) + \
 421           (2 * (mp)->m_sb.sb_sectsize) + \
 422           (mp)->m_sb.sb_sectsize + \
 423           XFS_ALLOCFREE_LOG_RES(mp, 2) + \
 424           (128 * (5 + XFS_ALLOCFREE_LOG_COUNT(mp, 2))))))
 425
 426 #define XFS_REMOVE_LOG_RES(mp)  ((mp)->m_reservations.tr_remove)
 427
 428 /*
 429  * For symlink we can modify:
 430  *    the parent directory inode: inode size
 431  *    the new inode: inode size
 432  *    the inode btree entry: 1 block
 433  *    the directory btree: (max depth + v2) * dir block size
 434  *    the directory inode's bmap btree: (max depth + v2) * block size
 435  *    the blocks for the symlink: 1 kB
 436  * Or in the first xact we allocate some inodes giving:
 437  *    the agi and agf of the ag getting the new inodes: 2 * sectorsize
 438  *    the inode blocks allocated: XFS_IALLOC_BLOCKS * blocksize
 439  *    the inode btree: max depth * blocksize
 440  *    the allocation btrees: 2 trees * (2 * max depth - 1) * block size
 441  */
 442 #define XFS_CALC_SYMLINK_LOG_RES(mp)            \
 443         (MAX( \
 444          ((mp)->m_sb.sb_inodesize + \
 445           (mp)->m_sb.sb_inodesize + \
 446           XFS_FSB_TO_B(mp, 1) + \
 447           XFS_DIROP_LOG_RES(mp) + \
 448           1024 + \
 449           (128 * (4 + XFS_DIROP_LOG_COUNT(mp)))), \
 450          (2 * (mp)->m_sb.sb_sectsize + \
 451           XFS_FSB_TO_B((mp), XFS_IALLOC_BLOCKS((mp))) + \
 452           XFS_FSB_TO_B((mp), (mp)->m_in_maxlevels) + \
 453           XFS_ALLOCFREE_LOG_RES(mp, 1) + \
 454           (128 * (2 + XFS_IALLOC_BLOCKS(mp) + (mp)->m_in_maxlevels + \
 455            XFS_ALLOCFREE_LOG_COUNT(mp, 1))))))
 456
 457 #define XFS_SYMLINK_LOG_RES(mp) ((mp)->m_reservations.tr_symlink)
 458
 459 /*
 460  * For create we can modify:
 461  *    the parent directory inode: inode size
 462  *    the new inode: inode size
 463  *    the inode btree entry: block size
 464  *    the superblock for the nlink flag: sector size
 465  *    the directory btree: (max depth + v2) * dir block size
 466  *    the directory inode's bmap btree: (max depth + v2) * block size
 467  * Or in the first xact we allocate some inodes giving:
 468  *    the agi and agf of the ag getting the new inodes: 2 * sectorsize
 469  *    the superblock for the nlink flag: sector size
 470  *    the inode blocks allocated: XFS_IALLOC_BLOCKS * blocksize
 471  *    the inode btree: max depth * blocksize
 472  *    the allocation btrees: 2 trees * (max depth - 1) * block size
 473  */
 474 #define XFS_CALC_CREATE_LOG_RES(mp)             \
 475         (MAX( \
 476          ((mp)->m_sb.sb_inodesize + \
 477           (mp)->m_sb.sb_inodesize + \
 478           (mp)->m_sb.sb_sectsize + \
 479           XFS_FSB_TO_B(mp, 1) + \
 480           XFS_DIROP_LOG_RES(mp) + \
 481           (128 * (3 + XFS_DIROP_LOG_COUNT(mp)))), \
 482          (3 * (mp)->m_sb.sb_sectsize + \
 483           XFS_FSB_TO_B((mp), XFS_IALLOC_BLOCKS((mp))) + \
 484           XFS_FSB_TO_B((mp), (mp)->m_in_maxlevels) + \
 485           XFS_ALLOCFREE_LOG_RES(mp, 1) + \
 486           (128 * (2 + XFS_IALLOC_BLOCKS(mp) + (mp)->m_in_maxlevels + \
 487            XFS_ALLOCFREE_LOG_COUNT(mp, 1))))))
 488
 489 #define XFS_CREATE_LOG_RES(mp)  ((mp)->m_reservations.tr_create)
 490
 491 /*
 492  * Making a new directory is the same as creating a new file.
 493  */
 494 #define XFS_CALC_MKDIR_LOG_RES(mp)      XFS_CALC_CREATE_LOG_RES(mp)
 495
 496 #define XFS_MKDIR_LOG_RES(mp)   ((mp)->m_reservations.tr_mkdir)
 497
 498 /*
 499  * In freeing an inode we can modify:
 500  *    the inode being freed: inode size
 501  *    the super block free inode counter: sector size
 502  *    the agi hash list and counters: sector size
 503  *    the inode btree entry: block size
 504  *    the on disk inode before ours in the agi hash list: inode cluster size
 505  *    the inode btree: max depth * blocksize
 506  *    the allocation btrees: 2 trees * (max depth - 1) * block size
 507  */
 508 #define XFS_CALC_IFREE_LOG_RES(mp) \
 509         ((mp)->m_sb.sb_inodesize + \
 510          (mp)->m_sb.sb_sectsize + \
 511          (mp)->m_sb.sb_sectsize + \
 512          XFS_FSB_TO_B((mp), 1) + \
 513          MAX((__uint16_t)XFS_FSB_TO_B((mp), 1), XFS_INODE_CLUSTER_SIZE(mp)) + \
 514          (128 * 5) + \
 515           XFS_ALLOCFREE_LOG_RES(mp, 1) + \
 516           (128 * (2 + XFS_IALLOC_BLOCKS(mp) + (mp)->m_in_maxlevels + \
 517            XFS_ALLOCFREE_LOG_COUNT(mp, 1))))
 518
 519
 520 #define XFS_IFREE_LOG_RES(mp)   ((mp)->m_reservations.tr_ifree)
 521
 522 /*
 523  * When only changing the inode we log the inode and possibly the superblock
 524  * We also add a bit of slop for the transaction stuff.
 525  */
 526 #define XFS_CALC_ICHANGE_LOG_RES(mp)    ((mp)->m_sb.sb_inodesize + \
 527                                          (mp)->m_sb.sb_sectsize + 512)
 528
 529 #define XFS_ICHANGE_LOG_RES(mp) ((mp)->m_reservations.tr_ichange)
 530
 531 /*
 532  * Growing the data section of the filesystem.
 533  *      superblock
 534  *      agi and agf
 535  *      allocation btrees
 536  */
 537 #define XFS_CALC_GROWDATA_LOG_RES(mp) \
 538         ((mp)->m_sb.sb_sectsize * 3 + \
 539          XFS_ALLOCFREE_LOG_RES(mp, 1) + \
 540          (128 * (3 + XFS_ALLOCFREE_LOG_COUNT(mp, 1))))
 541
 542 #define XFS_GROWDATA_LOG_RES(mp)    ((mp)->m_reservations.tr_growdata)
 543
 544 /*
 545  * Growing the rt section of the filesystem.
 546  * In the first set of transactions (ALLOC) we allocate space to the
 547  * bitmap or summary files.
 548  *      superblock: sector size
 549  *      agf of the ag from which the extent is allocated: sector size
 550  *      bmap btree for bitmap/summary inode: max depth * blocksize
 551  *      bitmap/summary inode: inode size
 552  *      allocation btrees for 1 block alloc: 2 * (2 * maxdepth - 1) * blocksize
 553  */
 554 #define XFS_CALC_GROWRTALLOC_LOG_RES(mp) \
 555         (2 * (mp)->m_sb.sb_sectsize + \
 556          XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK)) + \
 557          (mp)->m_sb.sb_inodesize + \
 558          XFS_ALLOCFREE_LOG_RES(mp, 1) + \
 559          (128 * \
 560           (3 + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) + \
 561            XFS_ALLOCFREE_LOG_COUNT(mp, 1))))
 562
 563 #define XFS_GROWRTALLOC_LOG_RES(mp)     ((mp)->m_reservations.tr_growrtalloc)
 564
 565 /*
 566  * Growing the rt section of the filesystem.
 567  * In the second set of transactions (ZERO) we zero the new metadata blocks.
 568  *      one bitmap/summary block: blocksize
 569  */
 570 #define XFS_CALC_GROWRTZERO_LOG_RES(mp) \
 571         ((mp)->m_sb.sb_blocksize + 128)
 572
 573 #define XFS_GROWRTZERO_LOG_RES(mp)      ((mp)->m_reservations.tr_growrtzero)
 574
 575 /*
 576  * Growing the rt section of the filesystem.
 577  * In the third set of transactions (FREE) we update metadata without
 578  * allocating any new blocks.
 579  *      superblock: sector size
 580  *      bitmap inode: inode size
 581  *      summary inode: inode size
 582  *      one bitmap block: blocksize
 583  *      summary blocks: new summary size
 584  */
 585 #define XFS_CALC_GROWRTFREE_LOG_RES(mp) \
 586         ((mp)->m_sb.sb_sectsize + \
 587          2 * (mp)->m_sb.sb_inodesize + \
 588          (mp)->m_sb.sb_blocksize + \
 589          (mp)->m_rsumsize + \
 590          (128 * 5))
 591
 592 #define XFS_GROWRTFREE_LOG_RES(mp)      ((mp)->m_reservations.tr_growrtfree)
 593
 594 /*
 595  * Logging the inode modification timestamp on a synchronous write.
 596  *      inode
 597  */
 598 #define XFS_CALC_SWRITE_LOG_RES(mp) \
 599         ((mp)->m_sb.sb_inodesize + 128)
 600
 601 #define XFS_SWRITE_LOG_RES(mp)  ((mp)->m_reservations.tr_swrite)
 602
 603 /*
 604  * Logging the inode timestamps on an fsync -- same as SWRITE
 605  * as long as SWRITE logs the entire inode core
 606  */
 607 #define XFS_FSYNC_TS_LOG_RES(mp)        ((mp)->m_reservations.tr_swrite)
 608
 609 /*
 610  * Logging the inode mode bits when writing a setuid/setgid file
 611  *      inode
 612  */
 613 #define XFS_CALC_WRITEID_LOG_RES(mp) \
 614         ((mp)->m_sb.sb_inodesize + 128)
 615
 616 #define XFS_WRITEID_LOG_RES(mp) ((mp)->m_reservations.tr_swrite)
 617
 618 /*
 619  * Converting the inode from non-attributed to attributed.
 620  *      the inode being converted: inode size
 621  *      agf block and superblock (for block allocation)
 622  *      the new block (directory sized)
 623  *      bmap blocks for the new directory block
 624  *      allocation btrees
 625  */
 626 #define XFS_CALC_ADDAFORK_LOG_RES(mp)   \
 627         ((mp)->m_sb.sb_inodesize + \
 628          (mp)->m_sb.sb_sectsize * 2 + \
 629          (mp)->m_dirblksize + \
 630          XFS_FSB_TO_B(mp, (XFS_DAENTER_BMAP1B(mp, XFS_DATA_FORK) + 1)) + \
 631          XFS_ALLOCFREE_LOG_RES(mp, 1) + \
 632          (128 * (4 + (XFS_DAENTER_BMAP1B(mp, XFS_DATA_FORK) + 1) + \
 633                  XFS_ALLOCFREE_LOG_COUNT(mp, 1))))
 634
 635 #define XFS_ADDAFORK_LOG_RES(mp)        ((mp)->m_reservations.tr_addafork)
 636
 637 /*
 638  * Removing the attribute fork of a file
 639  *    the inode being truncated: inode size
 640  *    the inode's bmap btree: max depth * block size
 641  * And the bmap_finish transaction can free the blocks and bmap blocks:
 642  *    the agf for each of the ags: 4 * sector size
 643  *    the agfl for each of the ags: 4 * sector size
 644  *    the super block to reflect the freed blocks: sector size
 645  *    worst case split in allocation btrees per extent assuming 4 extents:
 646  *              4 exts * 2 trees * (2 * max depth - 1) * block size
 647  */
 648 #define XFS_CALC_ATTRINVAL_LOG_RES(mp)  \
 649         (MAX( \
 650          ((mp)->m_sb.sb_inodesize + \
 651           XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK)) + \
 652           (128 * (1 + XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK)))), \
 653          ((4 * (mp)->m_sb.sb_sectsize) + \
 654           (4 * (mp)->m_sb.sb_sectsize) + \
 655           (mp)->m_sb.sb_sectsize + \
 656           XFS_ALLOCFREE_LOG_RES(mp, 4) + \
 657           (128 * (9 + XFS_ALLOCFREE_LOG_COUNT(mp, 4))))))
 658
 659 #define XFS_ATTRINVAL_LOG_RES(mp)       ((mp)->m_reservations.tr_attrinval)
 660
 661 /*
 662  * Setting an attribute.
 663  *      the inode getting the attribute
 664  *      the superblock for allocations
 665  *      the agfs extents are allocated from
 666  *      the attribute btree * max depth
 667  *      the inode allocation btree
 668  * Since attribute transaction space is dependent on the size of the attribute,
 669  * the calculation is done partially at mount time and partially at runtime.
 670  */
 671 #define XFS_CALC_ATTRSET_LOG_RES(mp)    \
 672         ((mp)->m_sb.sb_inodesize + \
 673          (mp)->m_sb.sb_sectsize + \
 674           XFS_FSB_TO_B((mp), XFS_DA_NODE_MAXDEPTH) + \
 675           (128 * (2 + XFS_DA_NODE_MAXDEPTH)))
 676
 677 #define XFS_ATTRSET_LOG_RES(mp, ext)    \
 678         ((mp)->m_reservations.tr_attrset + \
 679          (ext * (mp)->m_sb.sb_sectsize) + \
 680          (ext * XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK))) + \
 681          (128 * (ext + (ext * XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK)))))
 682
 683 /*
 684  * Removing an attribute.
 685  *    the inode: inode size
 686  *    the attribute btree could join: max depth * block size
 687  *    the inode bmap btree could join or split: max depth * block size
 688  * And the bmap_finish transaction can free the attr blocks freed giving:
 689  *    the agf for the ag in which the blocks live: 2 * sector size
 690  *    the agfl for the ag in which the blocks live: 2 * sector size
 691  *    the superblock for the free block count: sector size
 692  *    the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size
 693  */
 694 #define XFS_CALC_ATTRRM_LOG_RES(mp)     \
 695         (MAX( \
 696           ((mp)->m_sb.sb_inodesize + \
 697           XFS_FSB_TO_B((mp), XFS_DA_NODE_MAXDEPTH) + \
 698           XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK)) + \
 699           (128 * (1 + XFS_DA_NODE_MAXDEPTH + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK)))), \
 700          ((2 * (mp)->m_sb.sb_sectsize) + \
 701           (2 * (mp)->m_sb.sb_sectsize) + \
 702           (mp)->m_sb.sb_sectsize + \
 703           XFS_ALLOCFREE_LOG_RES(mp, 2) + \
 704           (128 * (5 + XFS_ALLOCFREE_LOG_COUNT(mp, 2))))))
 705
 706 #define XFS_ATTRRM_LOG_RES(mp)  ((mp)->m_reservations.tr_attrrm)
 707
 708 /*
 709  * Clearing a bad agino number in an agi hash bucket.
 710  */
 711 #define XFS_CALC_CLEAR_AGI_BUCKET_LOG_RES(mp) \
 712         ((mp)->m_sb.sb_sectsize + 128)
 713
 714 #define XFS_CLEAR_AGI_BUCKET_LOG_RES(mp)  ((mp)->m_reservations.tr_clearagi)
 715
 716
 717 /*
 718  * Various log count values.
 719  */
 720 #define XFS_DEFAULT_LOG_COUNT           1
 721 #define XFS_DEFAULT_PERM_LOG_COUNT      2
 722 #define XFS_ITRUNCATE_LOG_COUNT         2
 723 #define XFS_INACTIVE_LOG_COUNT          2
 724 #define XFS_CREATE_LOG_COUNT            2
 725 #define XFS_MKDIR_LOG_COUNT             3
 726 #define XFS_SYMLINK_LOG_COUNT           3
 727 #define XFS_REMOVE_LOG_COUNT            2
 728 #define XFS_LINK_LOG_COUNT              2
 729 #define XFS_RENAME_LOG_COUNT            2
 730 #define XFS_WRITE_LOG_COUNT             2
 731 #define XFS_ADDAFORK_LOG_COUNT          2
 732 #define XFS_ATTRINVAL_LOG_COUNT         1
 733 #define XFS_ATTRSET_LOG_COUNT           3
 734 #define XFS_ATTRRM_LOG_COUNT            3
 735
 736 /*
 737  * Here we centralize the specification of XFS meta-data buffer
 738  * reference count values.  This determine how hard the buffer
 739  * cache tries to hold onto the buffer.
 740  */
 741 #define XFS_AGF_REF             4
 742 #define XFS_AGI_REF             4
 743 #define XFS_AGFL_REF            3
 744 #define XFS_INO_BTREE_REF       3
 745 #define XFS_ALLOC_BTREE_REF     2
 746 #define XFS_BMAP_BTREE_REF      2
 747 #define XFS_DIR_BTREE_REF       2
 748 #define XFS_ATTR_BTREE_REF      1
 749 #define XFS_INO_REF             1
 750 #define XFS_DQUOT_REF           1
 751
 752 #ifdef __KERNEL__
 753
 754 struct xfs_buf;
 755 struct xfs_buftarg;
 756 struct xfs_efd_log_item;
 757 struct xfs_efi_log_item;
 758 struct xfs_inode;
 759 struct xfs_item_ops;
 760 struct xfs_log_iovec;
 761 struct xfs_log_item_desc;
 762 struct xfs_mount;
 763 struct xfs_trans;
 764 struct xfs_dquot_acct;
 765
 766 typedef struct xfs_log_item {
 767         struct list_head                li_ail;         /* AIL pointers */
 768         xfs_lsn_t                       li_lsn;         /* last on-disk lsn */
 769         struct xfs_log_item_desc        *li_desc;       /* ptr to current desc*/
 770         struct xfs_mount                *li_mountp;     /* ptr to fs mount */
 771         struct xfs_ail                  *li_ailp;       /* ptr to AIL */
 772         uint                            li_type;        /* item type */
 773         uint                            li_flags;       /* misc flags */
 774         struct xfs_log_item             *li_bio_list;   /* buffer item list */
 775         void                            (*li_cb)(struct xfs_buf *,
 776                                                  struct xfs_log_item *);
 777                                                         /* buffer item iodone */
 778                                                         /* callback func */
 779         struct xfs_item_ops             *li_ops;        /* function list */
 780 } xfs_log_item_t;
 781
 782 #define XFS_LI_IN_AIL   0x1
 783 #define XFS_LI_ABORTED  0x2
 784
 785 typedef struct xfs_item_ops {
 786         uint (*iop_size)(xfs_log_item_t *);
 787         void (*iop_format)(xfs_log_item_t *, struct xfs_log_iovec *);
 788         void (*iop_pin)(xfs_log_item_t *);
 789         void (*iop_unpin)(xfs_log_item_t *, int);
 790         void (*iop_unpin_remove)(xfs_log_item_t *, struct xfs_trans *);
 791         uint (*iop_trylock)(xfs_log_item_t *);
 792         void (*iop_unlock)(xfs_log_item_t *);
 793         xfs_lsn_t (*iop_committed)(xfs_log_item_t *, xfs_lsn_t);
 794         void (*iop_push)(xfs_log_item_t *);
 795         void (*iop_pushbuf)(xfs_log_item_t *);
 796         void (*iop_committing)(xfs_log_item_t *, xfs_lsn_t);
 797 } xfs_item_ops_t;
 798
 799 #define IOP_SIZE(ip)            (*(ip)->li_ops->iop_size)(ip)
 800 #define IOP_FORMAT(ip,vp)       (*(ip)->li_ops->iop_format)(ip, vp)
 801 #define IOP_PIN(ip)             (*(ip)->li_ops->iop_pin)(ip)
 802 #define IOP_UNPIN(ip, flags)    (*(ip)->li_ops->iop_unpin)(ip, flags)
 803 #define IOP_UNPIN_REMOVE(ip,tp) (*(ip)->li_ops->iop_unpin_remove)(ip, tp)
 804 #define IOP_TRYLOCK(ip)         (*(ip)->li_ops->iop_trylock)(ip)
 805 #define IOP_UNLOCK(ip)          (*(ip)->li_ops->iop_unlock)(ip)
 806 #define IOP_COMMITTED(ip, lsn)  (*(ip)->li_ops->iop_committed)(ip, lsn)
 807 #define IOP_PUSH(ip)            (*(ip)->li_ops->iop_push)(ip)
 808 #define IOP_PUSHBUF(ip)         (*(ip)->li_ops->iop_pushbuf)(ip)
 809 #define IOP_COMMITTING(ip, lsn) (*(ip)->li_ops->iop_committing)(ip, lsn)
 810
 811 /*
 812  * Return values for the IOP_TRYLOCK() routines.
 813  */
 814 #define XFS_ITEM_SUCCESS        0
 815 #define XFS_ITEM_PINNED         1
 816 #define XFS_ITEM_LOCKED         2
 817 #define XFS_ITEM_FLUSHING       3
 818 #define XFS_ITEM_PUSHBUF        4
 819
 820 /*
 821  * This structure is used to maintain a list of block ranges that have been
 822  * freed in the transaction.  The ranges are listed in the perag[] busy list
 823  * between when they're freed and the transaction is committed to disk.
 824  */
 825
 826 typedef struct xfs_log_busy_slot {
 827         xfs_agnumber_t          lbc_ag;
 828         ushort                  lbc_idx;        /* index in perag.busy[] */
 829 } xfs_log_busy_slot_t;
 830
 831 #define XFS_LBC_NUM_SLOTS       31
 832 typedef struct xfs_log_busy_chunk {
 833         struct xfs_log_busy_chunk       *lbc_next;
 834         uint                            lbc_free;       /* free slots bitmask */
 835         ushort                          lbc_unused;     /* first unused */
 836         xfs_log_busy_slot_t             lbc_busy[XFS_LBC_NUM_SLOTS];
 837 } xfs_log_busy_chunk_t;
 838
 839 #define XFS_LBC_MAX_SLOT        (XFS_LBC_NUM_SLOTS - 1)
 840 #define XFS_LBC_FREEMASK        ((1U << XFS_LBC_NUM_SLOTS) - 1)
 841
 842 #define XFS_LBC_INIT(cp)        ((cp)->lbc_free = XFS_LBC_FREEMASK)
 843 #define XFS_LBC_CLAIM(cp, slot) ((cp)->lbc_free &= ~(1 << (slot)))
 844 #define XFS_LBC_SLOT(cp, slot)  (&((cp)->lbc_busy[(slot)]))
 845 #define XFS_LBC_VACANCY(cp)     (((cp)->lbc_free) & XFS_LBC_FREEMASK)
 846 #define XFS_LBC_ISFREE(cp, slot) ((cp)->lbc_free & (1 << (slot)))
 847
 848 /*
 849  * This is the type of function which can be given to xfs_trans_callback()
 850  * to be called upon the transaction's commit to disk.
 851  */
 852 typedef void (*xfs_trans_callback_t)(struct xfs_trans *, void *);
 853
 854 /*
 855  * This is the structure maintained for every active transaction.
 856  */
 857 typedef struct xfs_trans {
 858         unsigned int            t_magic;        /* magic number */
 859         xfs_log_callback_t      t_logcb;        /* log callback struct */
 860         unsigned int            t_type;         /* transaction type */
 861         unsigned int            t_log_res;      /* amt of log space resvd */
 862         unsigned int            t_log_count;    /* count for perm log res */
 863         unsigned int            t_blk_res;      /* # of blocks resvd */
 864         unsigned int            t_blk_res_used; /* # of resvd blocks used */
 865         unsigned int            t_rtx_res;      /* # of rt extents resvd */
 866         unsigned int            t_rtx_res_used; /* # of resvd rt extents used */
 867         xfs_log_ticket_t        t_ticket;       /* log mgr ticket */
 868         xfs_lsn_t               t_lsn;          /* log seq num of start of
 869                                                  * transaction. */
 870         xfs_lsn_t               t_commit_lsn;   /* log seq num of end of
 871                                                  * transaction. */
 872         struct xfs_mount        *t_mountp;      /* ptr to fs mount struct */
 873         struct xfs_dquot_acct   *t_dqinfo;      /* acctg info for dquots */
 874         xfs_trans_callback_t    t_callback;     /* transaction callback */
 875         void                    *t_callarg;     /* callback arg */
 876         unsigned int            t_flags;        /* misc flags */
 877         int64_t                 t_icount_delta; /* superblock icount change */
 878         int64_t                 t_ifree_delta;  /* superblock ifree change */
 879         int64_t                 t_fdblocks_delta; /* superblock fdblocks chg */
 880         int64_t                 t_res_fdblocks_delta; /* on-disk only chg */
 881         int64_t                 t_frextents_delta;/* superblock freextents chg*/
 882         int64_t                 t_res_frextents_delta; /* on-disk only chg */
 883 #ifdef DEBUG
 884         int64_t                 t_ag_freeblks_delta; /* debugging counter */
 885         int64_t                 t_ag_flist_delta; /* debugging counter */
 886         int64_t                 t_ag_btree_delta; /* debugging counter */
 887 #endif
 888         int64_t                 t_dblocks_delta;/* superblock dblocks change */
 889         int64_t                 t_agcount_delta;/* superblock agcount change */
 890         int64_t                 t_imaxpct_delta;/* superblock imaxpct change */
 891         int64_t                 t_rextsize_delta;/* superblock rextsize chg */
 892         int64_t                 t_rbmblocks_delta;/* superblock rbmblocks chg */
 893         int64_t                 t_rblocks_delta;/* superblock rblocks change */
 894         int64_t                 t_rextents_delta;/* superblocks rextents chg */
 895         int64_t                 t_rextslog_delta;/* superblocks rextslog chg */
 896         unsigned int            t_items_free;   /* log item descs free */
 897         xfs_log_item_chunk_t    t_items;        /* first log item desc chunk */
 898         xfs_trans_header_t      t_header;       /* header for in-log trans */
 899         unsigned int            t_busy_free;    /* busy descs free */
 900         xfs_log_busy_chunk_t    t_busy;         /* busy/async free blocks */
 901         unsigned long           t_pflags;       /* saved process flags state */
 902 } xfs_trans_t;
 903
 904 /*
 905  * XFS transaction mechanism exported interfaces that are
 906  * actually macros.
 907  */
 908 #define xfs_trans_get_log_res(tp)       ((tp)->t_log_res)
 909 #define xfs_trans_get_log_count(tp)     ((tp)->t_log_count)
 910 #define xfs_trans_get_block_res(tp)     ((tp)->t_blk_res)
 911 #define xfs_trans_set_sync(tp)          ((tp)->t_flags |= XFS_TRANS_SYNC)
 912
 913 #ifdef DEBUG
 914 #define xfs_trans_agblocks_delta(tp, d) ((tp)->t_ag_freeblks_delta += (int64_t)d)
 915 #define xfs_trans_agflist_delta(tp, d)  ((tp)->t_ag_flist_delta += (int64_t)d)
 916 #define xfs_trans_agbtree_delta(tp, d)  ((tp)->t_ag_btree_delta += (int64_t)d)
 917 #else
 918 #define xfs_trans_agblocks_delta(tp, d)
 919 #define xfs_trans_agflist_delta(tp, d)
 920 #define xfs_trans_agbtree_delta(tp, d)
 921 #endif
 922
 923 /*
 924  * XFS transaction mechanism exported interfaces.
 925  */
 926 xfs_trans_t     *xfs_trans_alloc(struct xfs_mount *, uint);
 927 xfs_trans_t     *_xfs_trans_alloc(struct xfs_mount *, uint);
 928 xfs_trans_t     *xfs_trans_dup(xfs_trans_t *);
 929 int             xfs_trans_reserve(xfs_trans_t *, uint, uint, uint,
 930                                   uint, uint);
 931 void            xfs_trans_mod_sb(xfs_trans_t *, uint, int64_t);
 932 struct xfs_buf  *xfs_trans_get_buf(xfs_trans_t *, struct xfs_buftarg *, xfs_daddr_t,
 933                                    int, uint);
 934 int             xfs_trans_read_buf(struct xfs_mount *, xfs_trans_t *,
 935                                    struct xfs_buftarg *, xfs_daddr_t, int, uint,
 936                                    struct xfs_buf **);
 937 struct xfs_buf  *xfs_trans_getsb(xfs_trans_t *, struct xfs_mount *, int);
 938
 939 void            xfs_trans_brelse(xfs_trans_t *, struct xfs_buf *);
 940 void            xfs_trans_bjoin(xfs_trans_t *, struct xfs_buf *);
 941 void            xfs_trans_bhold(xfs_trans_t *, struct xfs_buf *);
 942 void            xfs_trans_bhold_release(xfs_trans_t *, struct xfs_buf *);
 943 void            xfs_trans_binval(xfs_trans_t *, struct xfs_buf *);
 944 void            xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *);
 945 void            xfs_trans_stale_inode_buf(xfs_trans_t *, struct xfs_buf *);
 946 void            xfs_trans_dquot_buf(xfs_trans_t *, struct xfs_buf *, uint);
 947 void            xfs_trans_inode_alloc_buf(xfs_trans_t *, struct xfs_buf *);
 948 int             xfs_trans_iget(struct xfs_mount *, xfs_trans_t *,
 949                                xfs_ino_t , uint, uint, struct xfs_inode **);
 950 void            xfs_trans_ijoin(xfs_trans_t *, struct xfs_inode *, uint);
 951 void            xfs_trans_ihold(xfs_trans_t *, struct xfs_inode *);
 952 void            xfs_trans_log_buf(xfs_trans_t *, struct xfs_buf *, uint, uint);
 953 void            xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint);
 954 struct xfs_efi_log_item *xfs_trans_get_efi(xfs_trans_t *, uint);
 955 void            xfs_efi_release(struct xfs_efi_log_item *, uint);
 956 void            xfs_trans_log_efi_extent(xfs_trans_t *,
 957                                          struct xfs_efi_log_item *,
 958                                          xfs_fsblock_t,
 959                                          xfs_extlen_t);
 960 struct xfs_efd_log_item *xfs_trans_get_efd(xfs_trans_t *,
 961                                   struct xfs_efi_log_item *,
 962                                   uint);
 963 void            xfs_trans_log_efd_extent(xfs_trans_t *,
 964                                          struct xfs_efd_log_item *,
 965                                          xfs_fsblock_t,
 966                                          xfs_extlen_t);
 967 int             _xfs_trans_commit(xfs_trans_t *,
 968                                   uint flags,
 969                                   int *);
 970 #define xfs_trans_commit(tp, flags)     _xfs_trans_commit(tp, flags, NULL)
 971 void            xfs_trans_cancel(xfs_trans_t *, int);
 972 int             xfs_trans_ail_init(struct xfs_mount *);
 973 void            xfs_trans_ail_destroy(struct xfs_mount *);
 974 xfs_log_busy_slot_t *xfs_trans_add_busy(xfs_trans_t *tp,
 975                                         xfs_agnumber_t ag,
 976                                         xfs_extlen_t idx);
 977
 978 extern kmem_zone_t      *xfs_trans_zone;
 979
 980 #endif  /* __KERNEL__ */
 981
 982 void            xfs_trans_init(struct xfs_mount *);
 983 int             xfs_trans_roll(struct xfs_trans **, struct xfs_inode *);
 984
 985 #endif  /* __XFS_TRANS_H__ */