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 /*
  22  * This is the structure written in the log at the head of
  23  * every transaction. It identifies the type and id of the
  24  * transaction, and contains the number of items logged by
  25  * the transaction so we know how many to expect during recovery.
  26  *
  27  * Do not change the below structure without redoing the code in
  28  * xlog_recover_add_to_trans() and xlog_recover_add_to_cont_trans().
  29  */
  30 typedef struct xfs_trans_header {
  31         uint            th_magic;               /* magic number */
  32         uint            th_type;                /* transaction type */
  33         __int32_t       th_tid;                 /* transaction id (unused) */
  34         uint            th_num_items;           /* num items logged by trans */
  35 } xfs_trans_header_t;
  36
  37 #define XFS_TRANS_HEADER_MAGIC  0x5452414e      /* TRAN */
  38
  39 /*
  40  * Log item types.
  41  */
  42 #define XFS_LI_EFI              0x1236
  43 #define XFS_LI_EFD              0x1237
  44 #define XFS_LI_IUNLINK          0x1238
  45 #define XFS_LI_INODE            0x123b  /* aligned ino chunks, var-size ibufs */
  46 #define XFS_LI_BUF              0x123c  /* v2 bufs, variable sized inode bufs */
  47 #define XFS_LI_DQUOT            0x123d
  48 #define XFS_LI_QUOTAOFF         0x123e
  49
  50 /*
  51  * Transaction types.  Used to distinguish types of buffers.
  52  */
  53 #define XFS_TRANS_SETATTR_NOT_SIZE      1
  54 #define XFS_TRANS_SETATTR_SIZE          2
  55 #define XFS_TRANS_INACTIVE              3
  56 #define XFS_TRANS_CREATE                4
  57 #define XFS_TRANS_CREATE_TRUNC          5
  58 #define XFS_TRANS_TRUNCATE_FILE         6
  59 #define XFS_TRANS_REMOVE                7
  60 #define XFS_TRANS_LINK                  8
  61 #define XFS_TRANS_RENAME                9
  62 #define XFS_TRANS_MKDIR                 10
  63 #define XFS_TRANS_RMDIR                 11
  64 #define XFS_TRANS_SYMLINK               12
  65 #define XFS_TRANS_SET_DMATTRS           13
  66 #define XFS_TRANS_GROWFS                14
  67 #define XFS_TRANS_STRAT_WRITE           15
  68 #define XFS_TRANS_DIOSTRAT              16
  69 #define XFS_TRANS_WRITE_SYNC            17
  70 #define XFS_TRANS_WRITEID               18
  71 #define XFS_TRANS_ADDAFORK              19
  72 #define XFS_TRANS_ATTRINVAL             20
  73 #define XFS_TRANS_ATRUNCATE             21
  74 #define XFS_TRANS_ATTR_SET              22
  75 #define XFS_TRANS_ATTR_RM               23
  76 #define XFS_TRANS_ATTR_FLAG             24
  77 #define XFS_TRANS_CLEAR_AGI_BUCKET      25
  78 #define XFS_TRANS_QM_SBCHANGE           26
  79 /*
  80  * Dummy entries since we use the transaction type to index into the
  81  * trans_type[] in xlog_recover_print_trans_head()
  82  */
  83 #define XFS_TRANS_DUMMY1                27
  84 #define XFS_TRANS_DUMMY2                28
  85 #define XFS_TRANS_QM_QUOTAOFF           29
  86 #define XFS_TRANS_QM_DQALLOC            30
  87 #define XFS_TRANS_QM_SETQLIM            31
  88 #define XFS_TRANS_QM_DQCLUSTER          32
  89 #define XFS_TRANS_QM_QINOCREATE         33
  90 #define XFS_TRANS_QM_QUOTAOFF_END       34
  91 #define XFS_TRANS_SB_UNIT               35
  92 #define XFS_TRANS_FSYNC_TS              36
  93 #define XFS_TRANS_GROWFSRT_ALLOC        37
  94 #define XFS_TRANS_GROWFSRT_ZERO         38
  95 #define XFS_TRANS_GROWFSRT_FREE         39
  96 #define XFS_TRANS_SWAPEXT               40
  97 #define XFS_TRANS_SB_COUNT              41
  98 #define XFS_TRANS_TYPE_MAX              41
  99 /* new transaction types need to be reflected in xfs_logprint(8) */
 100
 101
 102 #ifdef __KERNEL__
 103 struct xfs_buf;
 104 struct xfs_buftarg;
 105 struct xfs_efd_log_item;
 106 struct xfs_efi_log_item;
 107 struct xfs_inode;
 108 struct xfs_item_ops;
 109 struct xfs_log_iovec;
 110 struct xfs_log_item;
 111 struct xfs_log_item_desc;
 112 struct xfs_mount;
 113 struct xfs_trans;
 114 struct xfs_dquot_acct;
 115
 116 typedef struct xfs_log_item {
 117         struct list_head                li_ail;         /* AIL pointers */
 118         xfs_lsn_t                       li_lsn;         /* last on-disk lsn */
 119         struct xfs_log_item_desc        *li_desc;       /* ptr to current desc*/
 120         struct xfs_mount                *li_mountp;     /* ptr to fs mount */
 121         uint                            li_type;        /* item type */
 122         uint                            li_flags;       /* misc flags */
 123         struct xfs_log_item             *li_bio_list;   /* buffer item list */
 124         void                            (*li_cb)(struct xfs_buf *,
 125                                                  struct xfs_log_item *);
 126                                                         /* buffer item iodone */
 127                                                         /* callback func */
 128         struct xfs_item_ops             *li_ops;        /* function list */
 129 } xfs_log_item_t;
 130
 131 #define XFS_LI_IN_AIL   0x1
 132 #define XFS_LI_ABORTED  0x2
 133
 134 typedef struct xfs_item_ops {
 135         uint (*iop_size)(xfs_log_item_t *);
 136         void (*iop_format)(xfs_log_item_t *, struct xfs_log_iovec *);
 137         void (*iop_pin)(xfs_log_item_t *);
 138         void (*iop_unpin)(xfs_log_item_t *, int);
 139         void (*iop_unpin_remove)(xfs_log_item_t *, struct xfs_trans *);
 140         uint (*iop_trylock)(xfs_log_item_t *);
 141         void (*iop_unlock)(xfs_log_item_t *);
 142         xfs_lsn_t (*iop_committed)(xfs_log_item_t *, xfs_lsn_t);
 143         void (*iop_push)(xfs_log_item_t *);
 144         void (*iop_pushbuf)(xfs_log_item_t *);
 145         void (*iop_committing)(xfs_log_item_t *, xfs_lsn_t);
 146 } xfs_item_ops_t;
 147
 148 #define IOP_SIZE(ip)            (*(ip)->li_ops->iop_size)(ip)
 149 #define IOP_FORMAT(ip,vp)       (*(ip)->li_ops->iop_format)(ip, vp)
 150 #define IOP_PIN(ip)             (*(ip)->li_ops->iop_pin)(ip)
 151 #define IOP_UNPIN(ip, flags)    (*(ip)->li_ops->iop_unpin)(ip, flags)
 152 #define IOP_UNPIN_REMOVE(ip,tp) (*(ip)->li_ops->iop_unpin_remove)(ip, tp)
 153 #define IOP_TRYLOCK(ip)         (*(ip)->li_ops->iop_trylock)(ip)
 154 #define IOP_UNLOCK(ip)          (*(ip)->li_ops->iop_unlock)(ip)
 155 #define IOP_COMMITTED(ip, lsn)  (*(ip)->li_ops->iop_committed)(ip, lsn)
 156 #define IOP_PUSH(ip)            (*(ip)->li_ops->iop_push)(ip)
 157 #define IOP_PUSHBUF(ip)         (*(ip)->li_ops->iop_pushbuf)(ip)
 158 #define IOP_COMMITTING(ip, lsn) (*(ip)->li_ops->iop_committing)(ip, lsn)
 159
 160 /*
 161  * Return values for the IOP_TRYLOCK() routines.
 162  */
 163 #define XFS_ITEM_SUCCESS        0
 164 #define XFS_ITEM_PINNED         1
 165 #define XFS_ITEM_LOCKED         2
 166 #define XFS_ITEM_FLUSHING       3
 167 #define XFS_ITEM_PUSHBUF        4
 168
 169 #endif  /* __KERNEL__ */
 170
 171 /*
 172  * This structure is used to track log items associated with
 173  * a transaction.  It points to the log item and keeps some
 174  * flags to track the state of the log item.  It also tracks
 175  * the amount of space needed to log the item it describes
 176  * once we get to commit processing (see xfs_trans_commit()).
 177  */
 178 typedef struct xfs_log_item_desc {
 179         xfs_log_item_t  *lid_item;
 180         ushort          lid_size;
 181         unsigned char   lid_flags;
 182         unsigned char   lid_index;
 183 } xfs_log_item_desc_t;
 184
 185 #define XFS_LID_DIRTY           0x1
 186 #define XFS_LID_PINNED          0x2
 187 #define XFS_LID_BUF_STALE       0x8
 188
 189 /*
 190  * This structure is used to maintain a chunk list of log_item_desc
 191  * structures. The free field is a bitmask indicating which descriptors
 192  * in this chunk's array are free.  The unused field is the first value
 193  * not used since this chunk was allocated.
 194  */
 195 #define XFS_LIC_NUM_SLOTS       15
 196 typedef struct xfs_log_item_chunk {
 197         struct xfs_log_item_chunk       *lic_next;
 198         ushort                          lic_free;
 199         ushort                          lic_unused;
 200         xfs_log_item_desc_t             lic_descs[XFS_LIC_NUM_SLOTS];
 201 } xfs_log_item_chunk_t;
 202
 203 #define XFS_LIC_MAX_SLOT        (XFS_LIC_NUM_SLOTS - 1)
 204 #define XFS_LIC_FREEMASK        ((1 << XFS_LIC_NUM_SLOTS) - 1)
 205
 206
 207 /*
 208  * Initialize the given chunk.  Set the chunk's free descriptor mask
 209  * to indicate that all descriptors are free.  The caller gets to set
 210  * lic_unused to the right value (0 matches all free).  The
 211  * lic_descs.lid_index values are set up as each desc is allocated.
 212  */
 213 #define XFS_LIC_INIT(cp)        xfs_lic_init(cp)
 214 static inline void xfs_lic_init(xfs_log_item_chunk_t *cp)
 215 {
 216         cp->lic_free = XFS_LIC_FREEMASK;
 217 }
 218
 219 #define XFS_LIC_INIT_SLOT(cp,slot)      xfs_lic_init_slot(cp, slot)
 220 static inline void xfs_lic_init_slot(xfs_log_item_chunk_t *cp, int slot)
 221 {
 222         cp->lic_descs[slot].lid_index = (unsigned char)(slot);
 223 }
 224
 225 #define XFS_LIC_VACANCY(cp)             xfs_lic_vacancy(cp)
 226 static inline int xfs_lic_vacancy(xfs_log_item_chunk_t *cp)
 227 {
 228         return cp->lic_free & XFS_LIC_FREEMASK;
 229 }
 230
 231 #define XFS_LIC_ALL_FREE(cp)            xfs_lic_all_free(cp)
 232 static inline void xfs_lic_all_free(xfs_log_item_chunk_t *cp)
 233 {
 234         cp->lic_free = XFS_LIC_FREEMASK;
 235 }
 236
 237 #define XFS_LIC_ARE_ALL_FREE(cp)        xfs_lic_are_all_free(cp)
 238 static inline int xfs_lic_are_all_free(xfs_log_item_chunk_t *cp)
 239 {
 240         return ((cp->lic_free & XFS_LIC_FREEMASK) == XFS_LIC_FREEMASK);
 241 }
 242
 243 #define XFS_LIC_ISFREE(cp,slot) xfs_lic_isfree(cp,slot)
 244 static inline int xfs_lic_isfree(xfs_log_item_chunk_t *cp, int slot)
 245 {
 246         return (cp->lic_free & (1 << slot));
 247 }
 248
 249 #define XFS_LIC_CLAIM(cp,slot)          xfs_lic_claim(cp,slot)
 250 static inline void xfs_lic_claim(xfs_log_item_chunk_t *cp, int slot)
 251 {
 252         cp->lic_free &= ~(1 << slot);
 253 }
 254
 255 #define XFS_LIC_RELSE(cp,slot)          xfs_lic_relse(cp,slot)
 256 static inline void xfs_lic_relse(xfs_log_item_chunk_t *cp, int slot)
 257 {
 258         cp->lic_free |= 1 << slot;
 259 }
 260
 261 #define XFS_LIC_SLOT(cp,slot)           xfs_lic_slot(cp,slot)
 262 static inline xfs_log_item_desc_t *
 263 xfs_lic_slot(xfs_log_item_chunk_t *cp, int slot)
 264 {
 265         return &(cp->lic_descs[slot]);
 266 }
 267
 268 #define XFS_LIC_DESC_TO_SLOT(dp)        xfs_lic_desc_to_slot(dp)
 269 static inline int xfs_lic_desc_to_slot(xfs_log_item_desc_t *dp)
 270 {
 271         return (uint)dp->lid_index;
 272 }
 273
 274 /*
 275  * Calculate the address of a chunk given a descriptor pointer:
 276  * dp - dp->lid_index give the address of the start of the lic_descs array.
 277  * From this we subtract the offset of the lic_descs field in a chunk.
 278  * All of this yields the address of the chunk, which is
 279  * cast to a chunk pointer.
 280  */
 281 #define XFS_LIC_DESC_TO_CHUNK(dp)       xfs_lic_desc_to_chunk(dp)
 282 static inline xfs_log_item_chunk_t *
 283 xfs_lic_desc_to_chunk(xfs_log_item_desc_t *dp)
 284 {
 285         return (xfs_log_item_chunk_t*) \
 286                 (((xfs_caddr_t)((dp) - (dp)->lid_index)) - \
 287                 (xfs_caddr_t)(((xfs_log_item_chunk_t*)0)->lic_descs));
 288 }
 289
 290 #ifdef __KERNEL__
 291 /*
 292  * This structure is used to maintain a list of block ranges that have been
 293  * freed in the transaction.  The ranges are listed in the perag[] busy list
 294  * between when they're freed and the transaction is committed to disk.
 295  */
 296
 297 typedef struct xfs_log_busy_slot {
 298         xfs_agnumber_t          lbc_ag;
 299         ushort                  lbc_idx;        /* index in perag.busy[] */
 300 } xfs_log_busy_slot_t;
 301
 302 #define XFS_LBC_NUM_SLOTS       31
 303 typedef struct xfs_log_busy_chunk {
 304         struct xfs_log_busy_chunk       *lbc_next;
 305         uint                            lbc_free;       /* free slots bitmask */
 306         ushort                          lbc_unused;     /* first unused */
 307         xfs_log_busy_slot_t             lbc_busy[XFS_LBC_NUM_SLOTS];
 308 } xfs_log_busy_chunk_t;
 309
 310 #define XFS_LBC_MAX_SLOT        (XFS_LBC_NUM_SLOTS - 1)
 311 #define XFS_LBC_FREEMASK        ((1U << XFS_LBC_NUM_SLOTS) - 1)
 312
 313 #define XFS_LBC_INIT(cp)        ((cp)->lbc_free = XFS_LBC_FREEMASK)
 314 #define XFS_LBC_CLAIM(cp, slot) ((cp)->lbc_free &= ~(1 << (slot)))
 315 #define XFS_LBC_SLOT(cp, slot)  (&((cp)->lbc_busy[(slot)]))
 316 #define XFS_LBC_VACANCY(cp)     (((cp)->lbc_free) & XFS_LBC_FREEMASK)
 317 #define XFS_LBC_ISFREE(cp, slot) ((cp)->lbc_free & (1 << (slot)))
 318
 319 /*
 320  * This is the type of function which can be given to xfs_trans_callback()
 321  * to be called upon the transaction's commit to disk.
 322  */
 323 typedef void (*xfs_trans_callback_t)(struct xfs_trans *, void *);
 324
 325 /*
 326  * This is the structure maintained for every active transaction.
 327  */
 328 typedef struct xfs_trans {
 329         unsigned int            t_magic;        /* magic number */
 330         xfs_log_callback_t      t_logcb;        /* log callback struct */
 331         unsigned int            t_type;         /* transaction type */
 332         unsigned int            t_log_res;      /* amt of log space resvd */
 333         unsigned int            t_log_count;    /* count for perm log res */
 334         unsigned int            t_blk_res;      /* # of blocks resvd */
 335         unsigned int            t_blk_res_used; /* # of resvd blocks used */
 336         unsigned int            t_rtx_res;      /* # of rt extents resvd */
 337         unsigned int            t_rtx_res_used; /* # of resvd rt extents used */
 338         xfs_log_ticket_t        t_ticket;       /* log mgr ticket */
 339         xfs_lsn_t               t_lsn;          /* log seq num of start of
 340                                                  * transaction. */
 341         xfs_lsn_t               t_commit_lsn;   /* log seq num of end of
 342                                                  * transaction. */
 343         struct xfs_mount        *t_mountp;      /* ptr to fs mount struct */
 344         struct xfs_dquot_acct   *t_dqinfo;      /* acctg info for dquots */
 345         xfs_trans_callback_t    t_callback;     /* transaction callback */
 346         void                    *t_callarg;     /* callback arg */
 347         unsigned int            t_flags;        /* misc flags */
 348         int64_t                 t_icount_delta; /* superblock icount change */
 349         int64_t                 t_ifree_delta;  /* superblock ifree change */
 350         int64_t                 t_fdblocks_delta; /* superblock fdblocks chg */
 351         int64_t                 t_res_fdblocks_delta; /* on-disk only chg */
 352         int64_t                 t_frextents_delta;/* superblock freextents chg*/
 353         int64_t                 t_res_frextents_delta; /* on-disk only chg */
 354 #ifdef DEBUG
 355         int64_t                 t_ag_freeblks_delta; /* debugging counter */
 356         int64_t                 t_ag_flist_delta; /* debugging counter */
 357         int64_t                 t_ag_btree_delta; /* debugging counter */
 358 #endif
 359         int64_t                 t_dblocks_delta;/* superblock dblocks change */
 360         int64_t                 t_agcount_delta;/* superblock agcount change */
 361         int64_t                 t_imaxpct_delta;/* superblock imaxpct change */
 362         int64_t                 t_rextsize_delta;/* superblock rextsize chg */
 363         int64_t                 t_rbmblocks_delta;/* superblock rbmblocks chg */
 364         int64_t                 t_rblocks_delta;/* superblock rblocks change */
 365         int64_t                 t_rextents_delta;/* superblocks rextents chg */
 366         int64_t                 t_rextslog_delta;/* superblocks rextslog chg */
 367         unsigned int            t_items_free;   /* log item descs free */
 368         xfs_log_item_chunk_t    t_items;        /* first log item desc chunk */
 369         xfs_trans_header_t      t_header;       /* header for in-log trans */
 370         unsigned int            t_busy_free;    /* busy descs free */
 371         xfs_log_busy_chunk_t    t_busy;         /* busy/async free blocks */
 372         unsigned long           t_pflags;       /* saved process flags state */
 373 } xfs_trans_t;
 374
 375 #endif  /* __KERNEL__ */
 376
 377
 378 #define XFS_TRANS_MAGIC         0x5452414E      /* 'TRAN' */
 379 /*
 380  * Values for t_flags.
 381  */
 382 #define XFS_TRANS_DIRTY         0x01    /* something needs to be logged */
 383 #define XFS_TRANS_SB_DIRTY      0x02    /* superblock is modified */
 384 #define XFS_TRANS_PERM_LOG_RES  0x04    /* xact took a permanent log res */
 385 #define XFS_TRANS_SYNC          0x08    /* make commit synchronous */
 386 #define XFS_TRANS_DQ_DIRTY      0x10    /* at least one dquot in trx dirty */
 387 #define XFS_TRANS_RESERVE       0x20    /* OK to use reserved data blocks */
 388
 389 /*
 390  * Values for call flags parameter.
 391  */
 392 #define XFS_TRANS_NOSLEEP               0x1
 393 #define XFS_TRANS_WAIT                  0x2
 394 #define XFS_TRANS_RELEASE_LOG_RES       0x4
 395 #define XFS_TRANS_ABORT                 0x8
 396
 397 /*
 398  * Field values for xfs_trans_mod_sb.
 399  */
 400 #define XFS_TRANS_SB_ICOUNT             0x00000001
 401 #define XFS_TRANS_SB_IFREE              0x00000002
 402 #define XFS_TRANS_SB_FDBLOCKS           0x00000004
 403 #define XFS_TRANS_SB_RES_FDBLOCKS       0x00000008
 404 #define XFS_TRANS_SB_FREXTENTS          0x00000010
 405 #define XFS_TRANS_SB_RES_FREXTENTS      0x00000020
 406 #define XFS_TRANS_SB_DBLOCKS            0x00000040
 407 #define XFS_TRANS_SB_AGCOUNT            0x00000080
 408 #define XFS_TRANS_SB_IMAXPCT            0x00000100
 409 #define XFS_TRANS_SB_REXTSIZE           0x00000200
 410 #define XFS_TRANS_SB_RBMBLOCKS          0x00000400
 411 #define XFS_TRANS_SB_RBLOCKS            0x00000800
 412 #define XFS_TRANS_SB_REXTENTS           0x00001000
 413 #define XFS_TRANS_SB_REXTSLOG           0x00002000
 414
 415
 416 /*
 417  * Various log reservation values.
 418  * These are based on the size of the file system block
 419  * because that is what most transactions manipulate.
 420  * Each adds in an additional 128 bytes per item logged to
 421  * try to account for the overhead of the transaction mechanism.
 422  *
 423  * Note:
 424  * Most of the reservations underestimate the number of allocation
 425  * groups into which they could free extents in the xfs_bmap_finish()
 426  * call.  This is because the number in the worst case is quite high
 427  * and quite unusual.  In order to fix this we need to change
 428  * xfs_bmap_finish() to free extents in only a single AG at a time.
 429  * This will require changes to the EFI code as well, however, so that
 430  * the EFI for the extents not freed is logged again in each transaction.
 431  * See bug 261917.
 432  */
 433
 434 /*
 435  * Per-extent log reservation for the allocation btree changes
 436  * involved in freeing or allocating an extent.
 437  * 2 trees * (2 blocks/level * max depth - 1) * block size
 438  */
 439 #define XFS_ALLOCFREE_LOG_RES(mp,nx) \
 440         ((nx) * (2 * XFS_FSB_TO_B((mp), 2 * XFS_AG_MAXLEVELS(mp) - 1)))
 441 #define XFS_ALLOCFREE_LOG_COUNT(mp,nx) \
 442         ((nx) * (2 * (2 * XFS_AG_MAXLEVELS(mp) - 1)))
 443
 444 /*
 445  * Per-directory log reservation for any directory change.
 446  * dir blocks: (1 btree block per level + data block + free block) * dblock size
 447  * bmap btree: (levels + 2) * max depth * block size
 448  * v2 directory blocks can be fragmented below the dirblksize down to the fsb
 449  * size, so account for that in the DAENTER macros.
 450  */
 451 #define XFS_DIROP_LOG_RES(mp)   \
 452         (XFS_FSB_TO_B(mp, XFS_DAENTER_BLOCKS(mp, XFS_DATA_FORK)) + \
 453          (XFS_FSB_TO_B(mp, XFS_DAENTER_BMAPS(mp, XFS_DATA_FORK) + 1)))
 454 #define XFS_DIROP_LOG_COUNT(mp) \
 455         (XFS_DAENTER_BLOCKS(mp, XFS_DATA_FORK) + \
 456          XFS_DAENTER_BMAPS(mp, XFS_DATA_FORK) + 1)
 457
 458 /*
 459  * In a write transaction we can allocate a maximum of 2
 460  * extents.  This gives:
 461  *    the inode getting the new extents: inode size
 462  *    the inode\'s bmap btree: max depth * block size
 463  *    the agfs of the ags from which the extents are allocated: 2 * sector
 464  *    the superblock free block counter: sector size
 465  *    the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size
 466  * And the bmap_finish transaction can free bmap blocks in a join:
 467  *    the agfs of the ags containing the blocks: 2 * sector size
 468  *    the agfls of the ags containing the blocks: 2 * sector size
 469  *    the super block free block counter: sector size
 470  *    the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size
 471  */
 472 #define XFS_CALC_WRITE_LOG_RES(mp) \
 473         (MAX( \
 474          ((mp)->m_sb.sb_inodesize + \
 475           XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK)) + \
 476           (2 * (mp)->m_sb.sb_sectsize) + \
 477           (mp)->m_sb.sb_sectsize + \
 478           XFS_ALLOCFREE_LOG_RES(mp, 2) + \
 479           (128 * (4 + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) + XFS_ALLOCFREE_LOG_COUNT(mp, 2)))),\
 480          ((2 * (mp)->m_sb.sb_sectsize) + \
 481           (2 * (mp)->m_sb.sb_sectsize) + \
 482           (mp)->m_sb.sb_sectsize + \
 483           XFS_ALLOCFREE_LOG_RES(mp, 2) + \
 484           (128 * (5 + XFS_ALLOCFREE_LOG_COUNT(mp, 2))))))
 485
 486 #define XFS_WRITE_LOG_RES(mp)   ((mp)->m_reservations.tr_write)
 487
 488 /*
 489  * In truncating a file we free up to two extents at once.  We can modify:
 490  *    the inode being truncated: inode size
 491  *    the inode\'s bmap btree: (max depth + 1) * block size
 492  * And the bmap_finish transaction can free the blocks and bmap blocks:
 493  *    the agf for each of the ags: 4 * sector size
 494  *    the agfl for each of the ags: 4 * sector size
 495  *    the super block to reflect the freed blocks: sector size
 496  *    worst case split in allocation btrees per extent assuming 4 extents:
 497  *              4 exts * 2 trees * (2 * max depth - 1) * block size
 498  *    the inode btree: max depth * blocksize
 499  *    the allocation btrees: 2 trees * (max depth - 1) * block size
 500  */
 501 #define XFS_CALC_ITRUNCATE_LOG_RES(mp) \
 502         (MAX( \
 503          ((mp)->m_sb.sb_inodesize + \
 504           XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) + 1) + \
 505           (128 * (2 + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK)))), \
 506          ((4 * (mp)->m_sb.sb_sectsize) + \
 507           (4 * (mp)->m_sb.sb_sectsize) + \
 508           (mp)->m_sb.sb_sectsize + \
 509           XFS_ALLOCFREE_LOG_RES(mp, 4) + \
 510           (128 * (9 + XFS_ALLOCFREE_LOG_COUNT(mp, 4))) + \
 511           (128 * 5) + \
 512           XFS_ALLOCFREE_LOG_RES(mp, 1) + \
 513            (128 * (2 + XFS_IALLOC_BLOCKS(mp) + XFS_IN_MAXLEVELS(mp) + \
 514             XFS_ALLOCFREE_LOG_COUNT(mp, 1))))))
 515
 516 #define XFS_ITRUNCATE_LOG_RES(mp)   ((mp)->m_reservations.tr_itruncate)
 517
 518 /*
 519  * In renaming a files we can modify:
 520  *    the four inodes involved: 4 * inode size
 521  *    the two directory btrees: 2 * (max depth + v2) * dir block size
 522  *    the two directory bmap btrees: 2 * max depth * block size
 523  * And the bmap_finish transaction can free dir and bmap blocks (two sets
 524  *      of bmap blocks) giving:
 525  *    the agf for the ags in which the blocks live: 3 * sector size
 526  *    the agfl for the ags in which the blocks live: 3 * sector size
 527  *    the superblock for the free block count: sector size
 528  *    the allocation btrees: 3 exts * 2 trees * (2 * max depth - 1) * block size
 529  */
 530 #define XFS_CALC_RENAME_LOG_RES(mp) \
 531         (MAX( \
 532          ((4 * (mp)->m_sb.sb_inodesize) + \
 533           (2 * XFS_DIROP_LOG_RES(mp)) + \
 534           (128 * (4 + 2 * XFS_DIROP_LOG_COUNT(mp)))), \
 535          ((3 * (mp)->m_sb.sb_sectsize) + \
 536           (3 * (mp)->m_sb.sb_sectsize) + \
 537           (mp)->m_sb.sb_sectsize + \
 538           XFS_ALLOCFREE_LOG_RES(mp, 3) + \
 539           (128 * (7 + XFS_ALLOCFREE_LOG_COUNT(mp, 3))))))
 540
 541 #define XFS_RENAME_LOG_RES(mp)  ((mp)->m_reservations.tr_rename)
 542
 543 /*
 544  * For creating a link to an inode:
 545  *    the parent directory inode: inode size
 546  *    the linked inode: inode size
 547  *    the directory btree could split: (max depth + v2) * dir block size
 548  *    the directory bmap btree could join or split: (max depth + v2) * blocksize
 549  * And the bmap_finish transaction can free some bmap blocks giving:
 550  *    the agf for the ag in which the blocks live: sector size
 551  *    the agfl for the ag in which the blocks live: sector size
 552  *    the superblock for the free block count: sector size
 553  *    the allocation btrees: 2 trees * (2 * max depth - 1) * block size
 554  */
 555 #define XFS_CALC_LINK_LOG_RES(mp) \
 556         (MAX( \
 557          ((mp)->m_sb.sb_inodesize + \
 558           (mp)->m_sb.sb_inodesize + \
 559           XFS_DIROP_LOG_RES(mp) + \
 560           (128 * (2 + XFS_DIROP_LOG_COUNT(mp)))), \
 561          ((mp)->m_sb.sb_sectsize + \
 562           (mp)->m_sb.sb_sectsize + \
 563           (mp)->m_sb.sb_sectsize + \
 564           XFS_ALLOCFREE_LOG_RES(mp, 1) + \
 565           (128 * (3 + XFS_ALLOCFREE_LOG_COUNT(mp, 1))))))
 566
 567 #define XFS_LINK_LOG_RES(mp)    ((mp)->m_reservations.tr_link)
 568
 569 /*
 570  * For removing a directory entry we can modify:
 571  *    the parent directory inode: inode size
 572  *    the removed inode: inode size
 573  *    the directory btree could join: (max depth + v2) * dir block size
 574  *    the directory bmap btree could join or split: (max depth + v2) * blocksize
 575  * And the bmap_finish transaction can free the dir and bmap blocks giving:
 576  *    the agf for the ag in which the blocks live: 2 * sector size
 577  *    the agfl for the ag in which the blocks live: 2 * sector size
 578  *    the superblock for the free block count: sector size
 579  *    the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size
 580  */
 581 #define XFS_CALC_REMOVE_LOG_RES(mp)     \
 582         (MAX( \
 583          ((mp)->m_sb.sb_inodesize + \
 584           (mp)->m_sb.sb_inodesize + \
 585           XFS_DIROP_LOG_RES(mp) + \
 586           (128 * (2 + XFS_DIROP_LOG_COUNT(mp)))), \
 587          ((2 * (mp)->m_sb.sb_sectsize) + \
 588           (2 * (mp)->m_sb.sb_sectsize) + \
 589           (mp)->m_sb.sb_sectsize + \
 590           XFS_ALLOCFREE_LOG_RES(mp, 2) + \
 591           (128 * (5 + XFS_ALLOCFREE_LOG_COUNT(mp, 2))))))
 592
 593 #define XFS_REMOVE_LOG_RES(mp)  ((mp)->m_reservations.tr_remove)
 594
 595 /*
 596  * For symlink we can modify:
 597  *    the parent directory inode: inode size
 598  *    the new inode: inode size
 599  *    the inode btree entry: 1 block
 600  *    the directory btree: (max depth + v2) * dir block size
 601  *    the directory inode\'s bmap btree: (max depth + v2) * block size
 602  *    the blocks for the symlink: 1 KB
 603  * Or in the first xact we allocate some inodes giving:
 604  *    the agi and agf of the ag getting the new inodes: 2 * sectorsize
 605  *    the inode blocks allocated: XFS_IALLOC_BLOCKS * blocksize
 606  *    the inode btree: max depth * blocksize
 607  *    the allocation btrees: 2 trees * (2 * max depth - 1) * block size
 608  */
 609 #define XFS_CALC_SYMLINK_LOG_RES(mp)            \
 610         (MAX( \
 611          ((mp)->m_sb.sb_inodesize + \
 612           (mp)->m_sb.sb_inodesize + \
 613           XFS_FSB_TO_B(mp, 1) + \
 614           XFS_DIROP_LOG_RES(mp) + \
 615           1024 + \
 616           (128 * (4 + XFS_DIROP_LOG_COUNT(mp)))), \
 617          (2 * (mp)->m_sb.sb_sectsize + \
 618           XFS_FSB_TO_B((mp), XFS_IALLOC_BLOCKS((mp))) + \
 619           XFS_FSB_TO_B((mp), XFS_IN_MAXLEVELS(mp)) + \
 620           XFS_ALLOCFREE_LOG_RES(mp, 1) + \
 621           (128 * (2 + XFS_IALLOC_BLOCKS(mp) + XFS_IN_MAXLEVELS(mp) + \
 622            XFS_ALLOCFREE_LOG_COUNT(mp, 1))))))
 623
 624 #define XFS_SYMLINK_LOG_RES(mp) ((mp)->m_reservations.tr_symlink)
 625
 626 /*
 627  * For create we can modify:
 628  *    the parent directory inode: inode size
 629  *    the new inode: inode size
 630  *    the inode btree entry: block size
 631  *    the superblock for the nlink flag: sector size
 632  *    the directory btree: (max depth + v2) * dir block size
 633  *    the directory inode\'s bmap btree: (max depth + v2) * block size
 634  * Or in the first xact we allocate some inodes giving:
 635  *    the agi and agf of the ag getting the new inodes: 2 * sectorsize
 636  *    the superblock for the nlink flag: sector size
 637  *    the inode blocks allocated: XFS_IALLOC_BLOCKS * blocksize
 638  *    the inode btree: max depth * blocksize
 639  *    the allocation btrees: 2 trees * (max depth - 1) * block size
 640  */
 641 #define XFS_CALC_CREATE_LOG_RES(mp)             \
 642         (MAX( \
 643          ((mp)->m_sb.sb_inodesize + \
 644           (mp)->m_sb.sb_inodesize + \
 645           (mp)->m_sb.sb_sectsize + \
 646           XFS_FSB_TO_B(mp, 1) + \
 647           XFS_DIROP_LOG_RES(mp) + \
 648           (128 * (3 + XFS_DIROP_LOG_COUNT(mp)))), \
 649          (3 * (mp)->m_sb.sb_sectsize + \
 650           XFS_FSB_TO_B((mp), XFS_IALLOC_BLOCKS((mp))) + \
 651           XFS_FSB_TO_B((mp), XFS_IN_MAXLEVELS(mp)) + \
 652           XFS_ALLOCFREE_LOG_RES(mp, 1) + \
 653           (128 * (2 + XFS_IALLOC_BLOCKS(mp) + XFS_IN_MAXLEVELS(mp) + \
 654            XFS_ALLOCFREE_LOG_COUNT(mp, 1))))))
 655
 656 #define XFS_CREATE_LOG_RES(mp)  ((mp)->m_reservations.tr_create)
 657
 658 /*
 659  * Making a new directory is the same as creating a new file.
 660  */
 661 #define XFS_CALC_MKDIR_LOG_RES(mp)      XFS_CALC_CREATE_LOG_RES(mp)
 662
 663 #define XFS_MKDIR_LOG_RES(mp)   ((mp)->m_reservations.tr_mkdir)
 664
 665 /*
 666  * In freeing an inode we can modify:
 667  *    the inode being freed: inode size
 668  *    the super block free inode counter: sector size
 669  *    the agi hash list and counters: sector size
 670  *    the inode btree entry: block size
 671  *    the on disk inode before ours in the agi hash list: inode cluster size
 672  *    the inode btree: max depth * blocksize
 673  *    the allocation btrees: 2 trees * (max depth - 1) * block size
 674  */
 675 #define XFS_CALC_IFREE_LOG_RES(mp) \
 676         ((mp)->m_sb.sb_inodesize + \
 677          (mp)->m_sb.sb_sectsize + \
 678          (mp)->m_sb.sb_sectsize + \
 679          XFS_FSB_TO_B((mp), 1) + \
 680          MAX((__uint16_t)XFS_FSB_TO_B((mp), 1), XFS_INODE_CLUSTER_SIZE(mp)) + \
 681          (128 * 5) + \
 682           XFS_ALLOCFREE_LOG_RES(mp, 1) + \
 683           (128 * (2 + XFS_IALLOC_BLOCKS(mp) + XFS_IN_MAXLEVELS(mp) + \
 684            XFS_ALLOCFREE_LOG_COUNT(mp, 1))))
 685
 686
 687 #define XFS_IFREE_LOG_RES(mp)   ((mp)->m_reservations.tr_ifree)
 688
 689 /*
 690  * When only changing the inode we log the inode and possibly the superblock
 691  * We also add a bit of slop for the transaction stuff.
 692  */
 693 #define XFS_CALC_ICHANGE_LOG_RES(mp)    ((mp)->m_sb.sb_inodesize + \
 694                                          (mp)->m_sb.sb_sectsize + 512)
 695
 696 #define XFS_ICHANGE_LOG_RES(mp) ((mp)->m_reservations.tr_ichange)
 697
 698 /*
 699  * Growing the data section of the filesystem.
 700  *      superblock
 701  *      agi and agf
 702  *      allocation btrees
 703  */
 704 #define XFS_CALC_GROWDATA_LOG_RES(mp) \
 705         ((mp)->m_sb.sb_sectsize * 3 + \
 706          XFS_ALLOCFREE_LOG_RES(mp, 1) + \
 707          (128 * (3 + XFS_ALLOCFREE_LOG_COUNT(mp, 1))))
 708
 709 #define XFS_GROWDATA_LOG_RES(mp)    ((mp)->m_reservations.tr_growdata)
 710
 711 /*
 712  * Growing the rt section of the filesystem.
 713  * In the first set of transactions (ALLOC) we allocate space to the
 714  * bitmap or summary files.
 715  *      superblock: sector size
 716  *      agf of the ag from which the extent is allocated: sector size
 717  *      bmap btree for bitmap/summary inode: max depth * blocksize
 718  *      bitmap/summary inode: inode size
 719  *      allocation btrees for 1 block alloc: 2 * (2 * maxdepth - 1) * blocksize
 720  */
 721 #define XFS_CALC_GROWRTALLOC_LOG_RES(mp) \
 722         (2 * (mp)->m_sb.sb_sectsize + \
 723          XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK)) + \
 724          (mp)->m_sb.sb_inodesize + \
 725          XFS_ALLOCFREE_LOG_RES(mp, 1) + \
 726          (128 * \
 727           (3 + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) + \
 728            XFS_ALLOCFREE_LOG_COUNT(mp, 1))))
 729
 730 #define XFS_GROWRTALLOC_LOG_RES(mp)     ((mp)->m_reservations.tr_growrtalloc)
 731
 732 /*
 733  * Growing the rt section of the filesystem.
 734  * In the second set of transactions (ZERO) we zero the new metadata blocks.
 735  *      one bitmap/summary block: blocksize
 736  */
 737 #define XFS_CALC_GROWRTZERO_LOG_RES(mp) \
 738         ((mp)->m_sb.sb_blocksize + 128)
 739
 740 #define XFS_GROWRTZERO_LOG_RES(mp)      ((mp)->m_reservations.tr_growrtzero)
 741
 742 /*
 743  * Growing the rt section of the filesystem.
 744  * In the third set of transactions (FREE) we update metadata without
 745  * allocating any new blocks.
 746  *      superblock: sector size
 747  *      bitmap inode: inode size
 748  *      summary inode: inode size
 749  *      one bitmap block: blocksize
 750  *      summary blocks: new summary size
 751  */
 752 #define XFS_CALC_GROWRTFREE_LOG_RES(mp) \
 753         ((mp)->m_sb.sb_sectsize + \
 754          2 * (mp)->m_sb.sb_inodesize + \
 755          (mp)->m_sb.sb_blocksize + \
 756          (mp)->m_rsumsize + \
 757          (128 * 5))
 758
 759 #define XFS_GROWRTFREE_LOG_RES(mp)      ((mp)->m_reservations.tr_growrtfree)
 760
 761 /*
 762  * Logging the inode modification timestamp on a synchronous write.
 763  *      inode
 764  */
 765 #define XFS_CALC_SWRITE_LOG_RES(mp) \
 766         ((mp)->m_sb.sb_inodesize + 128)
 767
 768 #define XFS_SWRITE_LOG_RES(mp)  ((mp)->m_reservations.tr_swrite)
 769
 770 /*
 771  * Logging the inode timestamps on an fsync -- same as SWRITE
 772  * as long as SWRITE logs the entire inode core
 773  */
 774 #define XFS_FSYNC_TS_LOG_RES(mp)        ((mp)->m_reservations.tr_swrite)
 775
 776 /*
 777  * Logging the inode mode bits when writing a setuid/setgid file
 778  *      inode
 779  */
 780 #define XFS_CALC_WRITEID_LOG_RES(mp) \
 781         ((mp)->m_sb.sb_inodesize + 128)
 782
 783 #define XFS_WRITEID_LOG_RES(mp) ((mp)->m_reservations.tr_swrite)
 784
 785 /*
 786  * Converting the inode from non-attributed to attributed.
 787  *      the inode being converted: inode size
 788  *      agf block and superblock (for block allocation)
 789  *      the new block (directory sized)
 790  *      bmap blocks for the new directory block
 791  *      allocation btrees
 792  */
 793 #define XFS_CALC_ADDAFORK_LOG_RES(mp)   \
 794         ((mp)->m_sb.sb_inodesize + \
 795          (mp)->m_sb.sb_sectsize * 2 + \
 796          (mp)->m_dirblksize + \
 797          XFS_FSB_TO_B(mp, (XFS_DAENTER_BMAP1B(mp, XFS_DATA_FORK) + 1)) + \
 798          XFS_ALLOCFREE_LOG_RES(mp, 1) + \
 799          (128 * (4 + (XFS_DAENTER_BMAP1B(mp, XFS_DATA_FORK) + 1) + \
 800                  XFS_ALLOCFREE_LOG_COUNT(mp, 1))))
 801
 802 #define XFS_ADDAFORK_LOG_RES(mp)        ((mp)->m_reservations.tr_addafork)
 803
 804 /*
 805  * Removing the attribute fork of a file
 806  *    the inode being truncated: inode size
 807  *    the inode\'s bmap btree: max depth * block size
 808  * And the bmap_finish transaction can free the blocks and bmap blocks:
 809  *    the agf for each of the ags: 4 * sector size
 810  *    the agfl for each of the ags: 4 * sector size
 811  *    the super block to reflect the freed blocks: sector size
 812  *    worst case split in allocation btrees per extent assuming 4 extents:
 813  *              4 exts * 2 trees * (2 * max depth - 1) * block size
 814  */
 815 #define XFS_CALC_ATTRINVAL_LOG_RES(mp)  \
 816         (MAX( \
 817          ((mp)->m_sb.sb_inodesize + \
 818           XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK)) + \
 819           (128 * (1 + XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK)))), \
 820          ((4 * (mp)->m_sb.sb_sectsize) + \
 821           (4 * (mp)->m_sb.sb_sectsize) + \
 822           (mp)->m_sb.sb_sectsize + \
 823           XFS_ALLOCFREE_LOG_RES(mp, 4) + \
 824           (128 * (9 + XFS_ALLOCFREE_LOG_COUNT(mp, 4))))))
 825
 826 #define XFS_ATTRINVAL_LOG_RES(mp)       ((mp)->m_reservations.tr_attrinval)
 827
 828 /*
 829  * Setting an attribute.
 830  *      the inode getting the attribute
 831  *      the superblock for allocations
 832  *      the agfs extents are allocated from
 833  *      the attribute btree * max depth
 834  *      the inode allocation btree
 835  * Since attribute transaction space is dependent on the size of the attribute,
 836  * the calculation is done partially at mount time and partially at runtime.
 837  */
 838 #define XFS_CALC_ATTRSET_LOG_RES(mp)    \
 839         ((mp)->m_sb.sb_inodesize + \
 840          (mp)->m_sb.sb_sectsize + \
 841           XFS_FSB_TO_B((mp), XFS_DA_NODE_MAXDEPTH) + \
 842           (128 * (2 + XFS_DA_NODE_MAXDEPTH)))
 843
 844 #define XFS_ATTRSET_LOG_RES(mp, ext)    \
 845         ((mp)->m_reservations.tr_attrset + \
 846          (ext * (mp)->m_sb.sb_sectsize) + \
 847          (ext * XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK))) + \
 848          (128 * (ext + (ext * XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK)))))
 849
 850 /*
 851  * Removing an attribute.
 852  *    the inode: inode size
 853  *    the attribute btree could join: max depth * block size
 854  *    the inode bmap btree could join or split: max depth * block size
 855  * And the bmap_finish transaction can free the attr blocks freed giving:
 856  *    the agf for the ag in which the blocks live: 2 * sector size
 857  *    the agfl for the ag in which the blocks live: 2 * sector size
 858  *    the superblock for the free block count: sector size
 859  *    the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size
 860  */
 861 #define XFS_CALC_ATTRRM_LOG_RES(mp)     \
 862         (MAX( \
 863           ((mp)->m_sb.sb_inodesize + \
 864           XFS_FSB_TO_B((mp), XFS_DA_NODE_MAXDEPTH) + \
 865           XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK)) + \
 866           (128 * (1 + XFS_DA_NODE_MAXDEPTH + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK)))), \
 867          ((2 * (mp)->m_sb.sb_sectsize) + \
 868           (2 * (mp)->m_sb.sb_sectsize) + \
 869           (mp)->m_sb.sb_sectsize + \
 870           XFS_ALLOCFREE_LOG_RES(mp, 2) + \
 871           (128 * (5 + XFS_ALLOCFREE_LOG_COUNT(mp, 2))))))
 872
 873 #define XFS_ATTRRM_LOG_RES(mp)  ((mp)->m_reservations.tr_attrrm)
 874
 875 /*
 876  * Clearing a bad agino number in an agi hash bucket.
 877  */
 878 #define XFS_CALC_CLEAR_AGI_BUCKET_LOG_RES(mp) \
 879         ((mp)->m_sb.sb_sectsize + 128)
 880
 881 #define XFS_CLEAR_AGI_BUCKET_LOG_RES(mp)  ((mp)->m_reservations.tr_clearagi)
 882
 883
 884 /*
 885  * Various log count values.
 886  */
 887 #define XFS_DEFAULT_LOG_COUNT           1
 888 #define XFS_DEFAULT_PERM_LOG_COUNT      2
 889 #define XFS_ITRUNCATE_LOG_COUNT         2
 890 #define XFS_INACTIVE_LOG_COUNT          2
 891 #define XFS_CREATE_LOG_COUNT            2
 892 #define XFS_MKDIR_LOG_COUNT             3
 893 #define XFS_SYMLINK_LOG_COUNT           3
 894 #define XFS_REMOVE_LOG_COUNT            2
 895 #define XFS_LINK_LOG_COUNT              2
 896 #define XFS_RENAME_LOG_COUNT            2
 897 #define XFS_WRITE_LOG_COUNT             2
 898 #define XFS_ADDAFORK_LOG_COUNT          2
 899 #define XFS_ATTRINVAL_LOG_COUNT         1
 900 #define XFS_ATTRSET_LOG_COUNT           3
 901 #define XFS_ATTRRM_LOG_COUNT            3
 902
 903 /*
 904  * Here we centralize the specification of XFS meta-data buffer
 905  * reference count values.  This determine how hard the buffer
 906  * cache tries to hold onto the buffer.
 907  */
 908 #define XFS_AGF_REF             4
 909 #define XFS_AGI_REF             4
 910 #define XFS_AGFL_REF            3
 911 #define XFS_INO_BTREE_REF       3
 912 #define XFS_ALLOC_BTREE_REF     2
 913 #define XFS_BMAP_BTREE_REF      2
 914 #define XFS_DIR_BTREE_REF       2
 915 #define XFS_ATTR_BTREE_REF      1
 916 #define XFS_INO_REF             1
 917 #define XFS_DQUOT_REF           1
 918
 919 #ifdef __KERNEL__
 920 /*
 921  * XFS transaction mechanism exported interfaces that are
 922  * actually macros.
 923  */
 924 #define xfs_trans_get_log_res(tp)       ((tp)->t_log_res)
 925 #define xfs_trans_get_log_count(tp)     ((tp)->t_log_count)
 926 #define xfs_trans_get_block_res(tp)     ((tp)->t_blk_res)
 927 #define xfs_trans_set_sync(tp)          ((tp)->t_flags |= XFS_TRANS_SYNC)
 928
 929 #ifdef DEBUG
 930 #define xfs_trans_agblocks_delta(tp, d) ((tp)->t_ag_freeblks_delta += (int64_t)d)
 931 #define xfs_trans_agflist_delta(tp, d)  ((tp)->t_ag_flist_delta += (int64_t)d)
 932 #define xfs_trans_agbtree_delta(tp, d)  ((tp)->t_ag_btree_delta += (int64_t)d)
 933 #else
 934 #define xfs_trans_agblocks_delta(tp, d)
 935 #define xfs_trans_agflist_delta(tp, d)
 936 #define xfs_trans_agbtree_delta(tp, d)
 937 #endif
 938
 939 /*
 940  * XFS transaction mechanism exported interfaces.
 941  */
 942 void            xfs_trans_init(struct xfs_mount *);
 943 xfs_trans_t     *xfs_trans_alloc(struct xfs_mount *, uint);
 944 xfs_trans_t     *_xfs_trans_alloc(struct xfs_mount *, uint);
 945 xfs_trans_t     *xfs_trans_dup(xfs_trans_t *);
 946 int             xfs_trans_reserve(xfs_trans_t *, uint, uint, uint,
 947                                   uint, uint);
 948 void            xfs_trans_mod_sb(xfs_trans_t *, uint, int64_t);
 949 struct xfs_buf  *xfs_trans_get_buf(xfs_trans_t *, struct xfs_buftarg *, xfs_daddr_t,
 950                                    int, uint);
 951 int             xfs_trans_read_buf(struct xfs_mount *, xfs_trans_t *,
 952                                    struct xfs_buftarg *, xfs_daddr_t, int, uint,
 953                                    struct xfs_buf **);
 954 struct xfs_buf  *xfs_trans_getsb(xfs_trans_t *, struct xfs_mount *, int);
 955
 956 void            xfs_trans_brelse(xfs_trans_t *, struct xfs_buf *);
 957 void            xfs_trans_bjoin(xfs_trans_t *, struct xfs_buf *);
 958 void            xfs_trans_bhold(xfs_trans_t *, struct xfs_buf *);
 959 void            xfs_trans_bhold_release(xfs_trans_t *, struct xfs_buf *);
 960 void            xfs_trans_binval(xfs_trans_t *, struct xfs_buf *);
 961 void            xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *);
 962 void            xfs_trans_stale_inode_buf(xfs_trans_t *, struct xfs_buf *);
 963 void            xfs_trans_dquot_buf(xfs_trans_t *, struct xfs_buf *, uint);
 964 void            xfs_trans_inode_alloc_buf(xfs_trans_t *, struct xfs_buf *);
 965 int             xfs_trans_iget(struct xfs_mount *, xfs_trans_t *,
 966                                xfs_ino_t , uint, uint, struct xfs_inode **);
 967 void            xfs_trans_ijoin(xfs_trans_t *, struct xfs_inode *, uint);
 968 void            xfs_trans_ihold(xfs_trans_t *, struct xfs_inode *);
 969 void            xfs_trans_log_buf(xfs_trans_t *, struct xfs_buf *, uint, uint);
 970 void            xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint);
 971 struct xfs_efi_log_item *xfs_trans_get_efi(xfs_trans_t *, uint);
 972 void            xfs_efi_release(struct xfs_efi_log_item *, uint);
 973 void            xfs_trans_log_efi_extent(xfs_trans_t *,
 974                                          struct xfs_efi_log_item *,
 975                                          xfs_fsblock_t,
 976                                          xfs_extlen_t);
 977 struct xfs_efd_log_item *xfs_trans_get_efd(xfs_trans_t *,
 978                                   struct xfs_efi_log_item *,
 979                                   uint);
 980 void            xfs_trans_log_efd_extent(xfs_trans_t *,
 981                                          struct xfs_efd_log_item *,
 982                                          xfs_fsblock_t,
 983                                          xfs_extlen_t);
 984 int             _xfs_trans_commit(xfs_trans_t *,
 985                                   uint flags,
 986                                   int *);
 987 #define xfs_trans_commit(tp, flags)     _xfs_trans_commit(tp, flags, NULL)
 988 void            xfs_trans_cancel(xfs_trans_t *, int);
 989 int             xfs_trans_ail_init(struct xfs_mount *);
 990 void            xfs_trans_ail_destroy(struct xfs_mount *);
 991 void            xfs_trans_push_ail(struct xfs_mount *, xfs_lsn_t);
 992 xfs_lsn_t       xfs_trans_tail_ail(struct xfs_mount *);
 993 void            xfs_trans_unlocked_item(struct xfs_mount *,
 994                                         xfs_log_item_t *);
 995 xfs_log_busy_slot_t *xfs_trans_add_busy(xfs_trans_t *tp,
 996                                         xfs_agnumber_t ag,
 997                                         xfs_extlen_t idx);
 998
 999 extern kmem_zone_t      *xfs_trans_zone;
1000
1001 #endif  /* __KERNEL__ */
1002
1003 #endif  /* __XFS_TRANS_H__ */