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 #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  */
 164 typedef struct xfs_log_item_desc {
 165         struct xfs_log_item     *lid_item;
 166         ushort          lid_size;
 167         unsigned char   lid_flags;
 168         unsigned char   lid_index;
 169 } xfs_log_item_desc_t;
 170
 171 #define XFS_LID_DIRTY           0x1
 172 #define XFS_LID_PINNED          0x2
 173
 174 /*
 175  * This structure is used to maintain a chunk list of log_item_desc
 176  * structures. The free field is a bitmask indicating which descriptors
 177  * in this chunk's array are free.  The unused field is the first value
 178  * not used since this chunk was allocated.
 179  */
 180 #define XFS_LIC_NUM_SLOTS       15
 181 typedef struct xfs_log_item_chunk {
 182         struct xfs_log_item_chunk       *lic_next;
 183         ushort                          lic_free;
 184         ushort                          lic_unused;
 185         xfs_log_item_desc_t             lic_descs[XFS_LIC_NUM_SLOTS];
 186 } xfs_log_item_chunk_t;
 187
 188 #define XFS_LIC_MAX_SLOT        (XFS_LIC_NUM_SLOTS - 1)
 189 #define XFS_LIC_FREEMASK        ((1 << XFS_LIC_NUM_SLOTS) - 1)
 190
 191
 192 /*
 193  * Initialize the given chunk.  Set the chunk's free descriptor mask
 194  * to indicate that all descriptors are free.  The caller gets to set
 195  * lic_unused to the right value (0 matches all free).  The
 196  * lic_descs.lid_index values are set up as each desc is allocated.
 197  */
 198 static inline void xfs_lic_init(xfs_log_item_chunk_t *cp)
 199 {
 200         cp->lic_free = XFS_LIC_FREEMASK;
 201 }
 202
 203 static inline void xfs_lic_init_slot(xfs_log_item_chunk_t *cp, int slot)
 204 {
 205         cp->lic_descs[slot].lid_index = (unsigned char)(slot);
 206 }
 207
 208 static inline int xfs_lic_vacancy(xfs_log_item_chunk_t *cp)
 209 {
 210         return cp->lic_free & XFS_LIC_FREEMASK;
 211 }
 212
 213 static inline void xfs_lic_all_free(xfs_log_item_chunk_t *cp)
 214 {
 215         cp->lic_free = XFS_LIC_FREEMASK;
 216 }
 217
 218 static inline int xfs_lic_are_all_free(xfs_log_item_chunk_t *cp)
 219 {
 220         return ((cp->lic_free & XFS_LIC_FREEMASK) == XFS_LIC_FREEMASK);
 221 }
 222
 223 static inline int xfs_lic_isfree(xfs_log_item_chunk_t *cp, int slot)
 224 {
 225         return (cp->lic_free & (1 << slot));
 226 }
 227
 228 static inline void xfs_lic_claim(xfs_log_item_chunk_t *cp, int slot)
 229 {
 230         cp->lic_free &= ~(1 << slot);
 231 }
 232
 233 static inline void xfs_lic_relse(xfs_log_item_chunk_t *cp, int slot)
 234 {
 235         cp->lic_free |= 1 << slot;
 236 }
 237
 238 static inline xfs_log_item_desc_t *
 239 xfs_lic_slot(xfs_log_item_chunk_t *cp, int slot)
 240 {
 241         return &(cp->lic_descs[slot]);
 242 }
 243
 244 static inline int xfs_lic_desc_to_slot(xfs_log_item_desc_t *dp)
 245 {
 246         return (uint)dp->lid_index;
 247 }
 248
 249 /*
 250  * Calculate the address of a chunk given a descriptor pointer:
 251  * dp - dp->lid_index give the address of the start of the lic_descs array.
 252  * From this we subtract the offset of the lic_descs field in a chunk.
 253  * All of this yields the address of the chunk, which is
 254  * cast to a chunk pointer.
 255  */
 256 static inline xfs_log_item_chunk_t *
 257 xfs_lic_desc_to_chunk(xfs_log_item_desc_t *dp)
 258 {
 259         return (xfs_log_item_chunk_t*) \
 260                 (((xfs_caddr_t)((dp) - (dp)->lid_index)) - \
 261                 (xfs_caddr_t)(((xfs_log_item_chunk_t*)0)->lic_descs));
 262 }
 263
 264 #define XFS_TRANS_MAGIC         0x5452414E      /* 'TRAN' */
 265 /*
 266  * Values for t_flags.
 267  */
 268 #define XFS_TRANS_DIRTY         0x01    /* something needs to be logged */
 269 #define XFS_TRANS_SB_DIRTY      0x02    /* superblock is modified */
 270 #define XFS_TRANS_PERM_LOG_RES  0x04    /* xact took a permanent log res */
 271 #define XFS_TRANS_SYNC          0x08    /* make commit synchronous */
 272 #define XFS_TRANS_DQ_DIRTY      0x10    /* at least one dquot in trx dirty */
 273 #define XFS_TRANS_RESERVE       0x20    /* OK to use reserved data blocks */
 274
 275 /*
 276  * Values for call flags parameter.
 277  */
 278 #define XFS_TRANS_NOSLEEP               0x1
 279 #define XFS_TRANS_WAIT                  0x2
 280 #define XFS_TRANS_RELEASE_LOG_RES       0x4
 281 #define XFS_TRANS_ABORT                 0x8
 282
 283 /*
 284  * Field values for xfs_trans_mod_sb.
 285  */
 286 #define XFS_TRANS_SB_ICOUNT             0x00000001
 287 #define XFS_TRANS_SB_IFREE              0x00000002
 288 #define XFS_TRANS_SB_FDBLOCKS           0x00000004
 289 #define XFS_TRANS_SB_RES_FDBLOCKS       0x00000008
 290 #define XFS_TRANS_SB_FREXTENTS          0x00000010
 291 #define XFS_TRANS_SB_RES_FREXTENTS      0x00000020
 292 #define XFS_TRANS_SB_DBLOCKS            0x00000040
 293 #define XFS_TRANS_SB_AGCOUNT            0x00000080
 294 #define XFS_TRANS_SB_IMAXPCT            0x00000100
 295 #define XFS_TRANS_SB_REXTSIZE           0x00000200
 296 #define XFS_TRANS_SB_RBMBLOCKS          0x00000400
 297 #define XFS_TRANS_SB_RBLOCKS            0x00000800
 298 #define XFS_TRANS_SB_REXTENTS           0x00001000
 299 #define XFS_TRANS_SB_REXTSLOG           0x00002000
 300
 301
 302 /*
 303  * Per-extent log reservation for the allocation btree changes
 304  * involved in freeing or allocating an extent.
 305  * 2 trees * (2 blocks/level * max depth - 1) * block size
 306  */
 307 #define XFS_ALLOCFREE_LOG_RES(mp,nx) \
 308         ((nx) * (2 * XFS_FSB_TO_B((mp), 2 * XFS_AG_MAXLEVELS(mp) - 1)))
 309 #define XFS_ALLOCFREE_LOG_COUNT(mp,nx) \
 310         ((nx) * (2 * (2 * XFS_AG_MAXLEVELS(mp) - 1)))
 311
 312 /*
 313  * Per-directory log reservation for any directory change.
 314  * dir blocks: (1 btree block per level + data block + free block) * dblock size
 315  * bmap btree: (levels + 2) * max depth * block size
 316  * v2 directory blocks can be fragmented below the dirblksize down to the fsb
 317  * size, so account for that in the DAENTER macros.
 318  */
 319 #define XFS_DIROP_LOG_RES(mp)   \
 320         (XFS_FSB_TO_B(mp, XFS_DAENTER_BLOCKS(mp, XFS_DATA_FORK)) + \
 321          (XFS_FSB_TO_B(mp, XFS_DAENTER_BMAPS(mp, XFS_DATA_FORK) + 1)))
 322 #define XFS_DIROP_LOG_COUNT(mp) \
 323         (XFS_DAENTER_BLOCKS(mp, XFS_DATA_FORK) + \
 324          XFS_DAENTER_BMAPS(mp, XFS_DATA_FORK) + 1)
 325
 326
 327 #define XFS_WRITE_LOG_RES(mp)   ((mp)->m_reservations.tr_write)
 328 #define XFS_ITRUNCATE_LOG_RES(mp)   ((mp)->m_reservations.tr_itruncate)
 329 #define XFS_RENAME_LOG_RES(mp)  ((mp)->m_reservations.tr_rename)
 330 #define XFS_LINK_LOG_RES(mp)    ((mp)->m_reservations.tr_link)
 331 #define XFS_REMOVE_LOG_RES(mp)  ((mp)->m_reservations.tr_remove)
 332 #define XFS_SYMLINK_LOG_RES(mp) ((mp)->m_reservations.tr_symlink)
 333 #define XFS_CREATE_LOG_RES(mp)  ((mp)->m_reservations.tr_create)
 334 #define XFS_MKDIR_LOG_RES(mp)   ((mp)->m_reservations.tr_mkdir)
 335 #define XFS_IFREE_LOG_RES(mp)   ((mp)->m_reservations.tr_ifree)
 336 #define XFS_ICHANGE_LOG_RES(mp) ((mp)->m_reservations.tr_ichange)
 337 #define XFS_GROWDATA_LOG_RES(mp)    ((mp)->m_reservations.tr_growdata)
 338 #define XFS_GROWRTALLOC_LOG_RES(mp)     ((mp)->m_reservations.tr_growrtalloc)
 339 #define XFS_GROWRTZERO_LOG_RES(mp)      ((mp)->m_reservations.tr_growrtzero)
 340 #define XFS_GROWRTFREE_LOG_RES(mp)      ((mp)->m_reservations.tr_growrtfree)
 341 #define XFS_SWRITE_LOG_RES(mp)  ((mp)->m_reservations.tr_swrite)
 342 /*
 343  * Logging the inode timestamps on an fsync -- same as SWRITE
 344  * as long as SWRITE logs the entire inode core
 345  */
 346 #define XFS_FSYNC_TS_LOG_RES(mp)        ((mp)->m_reservations.tr_swrite)
 347 #define XFS_WRITEID_LOG_RES(mp) ((mp)->m_reservations.tr_swrite)
 348 #define XFS_ADDAFORK_LOG_RES(mp)        ((mp)->m_reservations.tr_addafork)
 349 #define XFS_ATTRINVAL_LOG_RES(mp)       ((mp)->m_reservations.tr_attrinval)
 350 #define XFS_ATTRSET_LOG_RES(mp, ext)    \
 351         ((mp)->m_reservations.tr_attrset + \
 352          (ext * (mp)->m_sb.sb_sectsize) + \
 353          (ext * XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK))) + \
 354          (128 * (ext + (ext * XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK)))))
 355 #define XFS_ATTRRM_LOG_RES(mp)  ((mp)->m_reservations.tr_attrrm)
 356 #define XFS_CLEAR_AGI_BUCKET_LOG_RES(mp)  ((mp)->m_reservations.tr_clearagi)
 357
 358
 359 /*
 360  * Various log count values.
 361  */
 362 #define XFS_DEFAULT_LOG_COUNT           1
 363 #define XFS_DEFAULT_PERM_LOG_COUNT      2
 364 #define XFS_ITRUNCATE_LOG_COUNT         2
 365 #define XFS_INACTIVE_LOG_COUNT          2
 366 #define XFS_CREATE_LOG_COUNT            2
 367 #define XFS_MKDIR_LOG_COUNT             3
 368 #define XFS_SYMLINK_LOG_COUNT           3
 369 #define XFS_REMOVE_LOG_COUNT            2
 370 #define XFS_LINK_LOG_COUNT              2
 371 #define XFS_RENAME_LOG_COUNT            2
 372 #define XFS_WRITE_LOG_COUNT             2
 373 #define XFS_ADDAFORK_LOG_COUNT          2
 374 #define XFS_ATTRINVAL_LOG_COUNT         1
 375 #define XFS_ATTRSET_LOG_COUNT           3
 376 #define XFS_ATTRRM_LOG_COUNT            3
 377
 378 /*
 379  * Here we centralize the specification of XFS meta-data buffer
 380  * reference count values.  This determine how hard the buffer
 381  * cache tries to hold onto the buffer.
 382  */
 383 #define XFS_AGF_REF             4
 384 #define XFS_AGI_REF             4
 385 #define XFS_AGFL_REF            3
 386 #define XFS_INO_BTREE_REF       3
 387 #define XFS_ALLOC_BTREE_REF     2
 388 #define XFS_BMAP_BTREE_REF      2
 389 #define XFS_DIR_BTREE_REF       2
 390 #define XFS_ATTR_BTREE_REF      1
 391 #define XFS_INO_REF             1
 392 #define XFS_DQUOT_REF           1
 393
 394 #ifdef __KERNEL__
 395
 396 struct xfs_buf;
 397 struct xfs_buftarg;
 398 struct xfs_efd_log_item;
 399 struct xfs_efi_log_item;
 400 struct xfs_inode;
 401 struct xfs_item_ops;
 402 struct xfs_log_iovec;
 403 struct xfs_log_item_desc;
 404 struct xfs_mount;
 405 struct xfs_trans;
 406 struct xfs_dquot_acct;
 407 struct xfs_busy_extent;
 408
 409 typedef struct xfs_log_item {
 410         struct list_head                li_ail;         /* AIL pointers */
 411         xfs_lsn_t                       li_lsn;         /* last on-disk lsn */
 412         struct xfs_log_item_desc        *li_desc;       /* ptr to current desc*/
 413         struct xfs_mount                *li_mountp;     /* ptr to fs mount */
 414         struct xfs_ail                  *li_ailp;       /* ptr to AIL */
 415         uint                            li_type;        /* item type */
 416         uint                            li_flags;       /* misc flags */
 417         struct xfs_log_item             *li_bio_list;   /* buffer item list */
 418         void                            (*li_cb)(struct xfs_buf *,
 419                                                  struct xfs_log_item *);
 420                                                         /* buffer item iodone */
 421                                                         /* callback func */
 422         struct xfs_item_ops             *li_ops;        /* function list */
 423
 424         /* delayed logging */
 425         struct list_head                li_cil;         /* CIL pointers */
 426         struct xfs_log_vec              *li_lv;         /* active log vector */
 427         xfs_lsn_t                       li_seq;         /* CIL commit seq */
 428 } xfs_log_item_t;
 429
 430 #define XFS_LI_IN_AIL   0x1
 431 #define XFS_LI_ABORTED  0x2
 432
 433 #define XFS_LI_FLAGS \
 434         { XFS_LI_IN_AIL,        "IN_AIL" }, \
 435         { XFS_LI_ABORTED,       "ABORTED" }
 436
 437 typedef struct xfs_item_ops {
 438         uint (*iop_size)(xfs_log_item_t *);
 439         void (*iop_format)(xfs_log_item_t *, struct xfs_log_iovec *);
 440         void (*iop_pin)(xfs_log_item_t *);
 441         void (*iop_unpin)(xfs_log_item_t *);
 442         void (*iop_unpin_remove)(xfs_log_item_t *, struct xfs_trans *);
 443         uint (*iop_trylock)(xfs_log_item_t *);
 444         void (*iop_unlock)(xfs_log_item_t *);
 445         xfs_lsn_t (*iop_committed)(xfs_log_item_t *, xfs_lsn_t);
 446         void (*iop_push)(xfs_log_item_t *);
 447         void (*iop_pushbuf)(xfs_log_item_t *);
 448         void (*iop_committing)(xfs_log_item_t *, xfs_lsn_t);
 449 } xfs_item_ops_t;
 450
 451 #define IOP_SIZE(ip)            (*(ip)->li_ops->iop_size)(ip)
 452 #define IOP_FORMAT(ip,vp)       (*(ip)->li_ops->iop_format)(ip, vp)
 453 #define IOP_PIN(ip)             (*(ip)->li_ops->iop_pin)(ip)
 454 #define IOP_UNPIN(ip)           (*(ip)->li_ops->iop_unpin)(ip)
 455 #define IOP_UNPIN_REMOVE(ip,tp) (*(ip)->li_ops->iop_unpin_remove)(ip, tp)
 456 #define IOP_TRYLOCK(ip)         (*(ip)->li_ops->iop_trylock)(ip)
 457 #define IOP_UNLOCK(ip)          (*(ip)->li_ops->iop_unlock)(ip)
 458 #define IOP_COMMITTED(ip, lsn)  (*(ip)->li_ops->iop_committed)(ip, lsn)
 459 #define IOP_PUSH(ip)            (*(ip)->li_ops->iop_push)(ip)
 460 #define IOP_PUSHBUF(ip)         (*(ip)->li_ops->iop_pushbuf)(ip)
 461 #define IOP_COMMITTING(ip, lsn) (*(ip)->li_ops->iop_committing)(ip, lsn)
 462
 463 /*
 464  * Return values for the IOP_TRYLOCK() routines.
 465  */
 466 #define XFS_ITEM_SUCCESS        0
 467 #define XFS_ITEM_PINNED         1
 468 #define XFS_ITEM_LOCKED         2
 469 #define XFS_ITEM_PUSHBUF        3
 470
 471 /*
 472  * This is the type of function which can be given to xfs_trans_callback()
 473  * to be called upon the transaction's commit to disk.
 474  */
 475 typedef void (*xfs_trans_callback_t)(struct xfs_trans *, void *);
 476
 477 /*
 478  * This is the structure maintained for every active transaction.
 479  */
 480 typedef struct xfs_trans {
 481         unsigned int            t_magic;        /* magic number */
 482         xfs_log_callback_t      t_logcb;        /* log callback struct */
 483         unsigned int            t_type;         /* transaction type */
 484         unsigned int            t_log_res;      /* amt of log space resvd */
 485         unsigned int            t_log_count;    /* count for perm log res */
 486         unsigned int            t_blk_res;      /* # of blocks resvd */
 487         unsigned int            t_blk_res_used; /* # of resvd blocks used */
 488         unsigned int            t_rtx_res;      /* # of rt extents resvd */
 489         unsigned int            t_rtx_res_used; /* # of resvd rt extents used */
 490         struct xlog_ticket      *t_ticket;      /* log mgr ticket */
 491         xfs_lsn_t               t_lsn;          /* log seq num of start of
 492                                                  * transaction. */
 493         xfs_lsn_t               t_commit_lsn;   /* log seq num of end of
 494                                                  * transaction. */
 495         struct xfs_mount        *t_mountp;      /* ptr to fs mount struct */
 496         struct xfs_dquot_acct   *t_dqinfo;      /* acctg info for dquots */
 497         xfs_trans_callback_t    t_callback;     /* transaction callback */
 498         void                    *t_callarg;     /* callback arg */
 499         unsigned int            t_flags;        /* misc flags */
 500         int64_t                 t_icount_delta; /* superblock icount change */
 501         int64_t                 t_ifree_delta;  /* superblock ifree change */
 502         int64_t                 t_fdblocks_delta; /* superblock fdblocks chg */
 503         int64_t                 t_res_fdblocks_delta; /* on-disk only chg */
 504         int64_t                 t_frextents_delta;/* superblock freextents chg*/
 505         int64_t                 t_res_frextents_delta; /* on-disk only chg */
 506 #ifdef DEBUG
 507         int64_t                 t_ag_freeblks_delta; /* debugging counter */
 508         int64_t                 t_ag_flist_delta; /* debugging counter */
 509         int64_t                 t_ag_btree_delta; /* debugging counter */
 510 #endif
 511         int64_t                 t_dblocks_delta;/* superblock dblocks change */
 512         int64_t                 t_agcount_delta;/* superblock agcount change */
 513         int64_t                 t_imaxpct_delta;/* superblock imaxpct change */
 514         int64_t                 t_rextsize_delta;/* superblock rextsize chg */
 515         int64_t                 t_rbmblocks_delta;/* superblock rbmblocks chg */
 516         int64_t                 t_rblocks_delta;/* superblock rblocks change */
 517         int64_t                 t_rextents_delta;/* superblocks rextents chg */
 518         int64_t                 t_rextslog_delta;/* superblocks rextslog chg */
 519         unsigned int            t_items_free;   /* log item descs free */
 520         xfs_log_item_chunk_t    t_items;        /* first log item desc chunk */
 521         xfs_trans_header_t      t_header;       /* header for in-log trans */
 522         struct list_head        t_busy;         /* list of busy extents */
 523         unsigned long           t_pflags;       /* saved process flags state */
 524 } xfs_trans_t;
 525
 526 /*
 527  * XFS transaction mechanism exported interfaces that are
 528  * actually macros.
 529  */
 530 #define xfs_trans_get_log_res(tp)       ((tp)->t_log_res)
 531 #define xfs_trans_get_log_count(tp)     ((tp)->t_log_count)
 532 #define xfs_trans_get_block_res(tp)     ((tp)->t_blk_res)
 533 #define xfs_trans_set_sync(tp)          ((tp)->t_flags |= XFS_TRANS_SYNC)
 534
 535 #ifdef DEBUG
 536 #define xfs_trans_agblocks_delta(tp, d) ((tp)->t_ag_freeblks_delta += (int64_t)d)
 537 #define xfs_trans_agflist_delta(tp, d)  ((tp)->t_ag_flist_delta += (int64_t)d)
 538 #define xfs_trans_agbtree_delta(tp, d)  ((tp)->t_ag_btree_delta += (int64_t)d)
 539 #else
 540 #define xfs_trans_agblocks_delta(tp, d)
 541 #define xfs_trans_agflist_delta(tp, d)
 542 #define xfs_trans_agbtree_delta(tp, d)
 543 #endif
 544
 545 /*
 546  * XFS transaction mechanism exported interfaces.
 547  */
 548 xfs_trans_t     *xfs_trans_alloc(struct xfs_mount *, uint);
 549 xfs_trans_t     *_xfs_trans_alloc(struct xfs_mount *, uint, uint);
 550 xfs_trans_t     *xfs_trans_dup(xfs_trans_t *);
 551 int             xfs_trans_reserve(xfs_trans_t *, uint, uint, uint,
 552                                   uint, uint);
 553 void            xfs_trans_mod_sb(xfs_trans_t *, uint, int64_t);
 554 struct xfs_buf  *xfs_trans_get_buf(xfs_trans_t *, struct xfs_buftarg *, xfs_daddr_t,
 555                                    int, uint);
 556 int             xfs_trans_read_buf(struct xfs_mount *, xfs_trans_t *,
 557                                    struct xfs_buftarg *, xfs_daddr_t, int, uint,
 558                                    struct xfs_buf **);
 559 struct xfs_buf  *xfs_trans_getsb(xfs_trans_t *, struct xfs_mount *, int);
 560
 561 void            xfs_trans_brelse(xfs_trans_t *, struct xfs_buf *);
 562 void            xfs_trans_bjoin(xfs_trans_t *, struct xfs_buf *);
 563 void            xfs_trans_bhold(xfs_trans_t *, struct xfs_buf *);
 564 void            xfs_trans_bhold_release(xfs_trans_t *, struct xfs_buf *);
 565 void            xfs_trans_binval(xfs_trans_t *, struct xfs_buf *);
 566 void            xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *);
 567 void            xfs_trans_stale_inode_buf(xfs_trans_t *, struct xfs_buf *);
 568 void            xfs_trans_dquot_buf(xfs_trans_t *, struct xfs_buf *, uint);
 569 void            xfs_trans_inode_alloc_buf(xfs_trans_t *, struct xfs_buf *);
 570 int             xfs_trans_iget(struct xfs_mount *, xfs_trans_t *,
 571                                xfs_ino_t , uint, uint, struct xfs_inode **);
 572 void            xfs_trans_ijoin(xfs_trans_t *, struct xfs_inode *, uint);
 573 void            xfs_trans_ihold(xfs_trans_t *, struct xfs_inode *);
 574 void            xfs_trans_log_buf(xfs_trans_t *, struct xfs_buf *, uint, uint);
 575 void            xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint);
 576 struct xfs_efi_log_item *xfs_trans_get_efi(xfs_trans_t *, uint);
 577 void            xfs_efi_release(struct xfs_efi_log_item *, uint);
 578 void            xfs_trans_log_efi_extent(xfs_trans_t *,
 579                                          struct xfs_efi_log_item *,
 580                                          xfs_fsblock_t,
 581                                          xfs_extlen_t);
 582 struct xfs_efd_log_item *xfs_trans_get_efd(xfs_trans_t *,
 583                                   struct xfs_efi_log_item *,
 584                                   uint);
 585 void            xfs_trans_log_efd_extent(xfs_trans_t *,
 586                                          struct xfs_efd_log_item *,
 587                                          xfs_fsblock_t,
 588                                          xfs_extlen_t);
 589 int             _xfs_trans_commit(xfs_trans_t *,
 590                                   uint flags,
 591                                   int *);
 592 #define xfs_trans_commit(tp, flags)     _xfs_trans_commit(tp, flags, NULL)
 593 void            xfs_trans_cancel(xfs_trans_t *, int);
 594 int             xfs_trans_ail_init(struct xfs_mount *);
 595 void            xfs_trans_ail_destroy(struct xfs_mount *);
 596
 597 extern kmem_zone_t      *xfs_trans_zone;
 598
 599 #endif  /* __KERNEL__ */
 600
 601 void            xfs_trans_init(struct xfs_mount *);
 602 int             xfs_trans_roll(struct xfs_trans **, struct xfs_inode *);
 603
 604 #endif  /* __XFS_TRANS_H__ */