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_ail_entry {
 117         struct xfs_log_item     *ail_forw;      /* AIL forw pointer */
 118         struct xfs_log_item     *ail_back;      /* AIL back pointer */
 119 } xfs_ail_entry_t;
 120
 121 typedef struct xfs_log_item {
 122         xfs_ail_entry_t                 li_ail;         /* AIL pointers */
 123         xfs_lsn_t                       li_lsn;         /* last on-disk lsn */
 124         struct xfs_log_item_desc        *li_desc;       /* ptr to current desc*/
 125         struct xfs_mount                *li_mountp;     /* ptr to fs mount */
 126         uint                            li_type;        /* item type */
 127         uint                            li_flags;       /* misc flags */
 128         struct xfs_log_item             *li_bio_list;   /* buffer item list */
 129         void                            (*li_cb)(struct xfs_buf *,
 130                                                  struct xfs_log_item *);
 131                                                         /* buffer item iodone */
 132                                                         /* callback func */
 133         struct xfs_item_ops             *li_ops;        /* function list */
 134 } xfs_log_item_t;
 135
 136 #define XFS_LI_IN_AIL   0x1
 137 #define XFS_LI_ABORTED  0x2
 138
 139 typedef struct xfs_item_ops {
 140         uint (*iop_size)(xfs_log_item_t *);
 141         void (*iop_format)(xfs_log_item_t *, struct xfs_log_iovec *);
 142         void (*iop_pin)(xfs_log_item_t *);
 143         void (*iop_unpin)(xfs_log_item_t *, int);
 144         void (*iop_unpin_remove)(xfs_log_item_t *, struct xfs_trans *);
 145         uint (*iop_trylock)(xfs_log_item_t *);
 146         void (*iop_unlock)(xfs_log_item_t *);
 147         xfs_lsn_t (*iop_committed)(xfs_log_item_t *, xfs_lsn_t);
 148         void (*iop_push)(xfs_log_item_t *);
 149         void (*iop_pushbuf)(xfs_log_item_t *);
 150         void (*iop_committing)(xfs_log_item_t *, xfs_lsn_t);
 151 } xfs_item_ops_t;
 152
 153 #define IOP_SIZE(ip)            (*(ip)->li_ops->iop_size)(ip)
 154 #define IOP_FORMAT(ip,vp)       (*(ip)->li_ops->iop_format)(ip, vp)
 155 #define IOP_PIN(ip)             (*(ip)->li_ops->iop_pin)(ip)
 156 #define IOP_UNPIN(ip, flags)    (*(ip)->li_ops->iop_unpin)(ip, flags)
 157 #define IOP_UNPIN_REMOVE(ip,tp) (*(ip)->li_ops->iop_unpin_remove)(ip, tp)
 158 #define IOP_TRYLOCK(ip)         (*(ip)->li_ops->iop_trylock)(ip)
 159 #define IOP_UNLOCK(ip)          (*(ip)->li_ops->iop_unlock)(ip)
 160 #define IOP_COMMITTED(ip, lsn)  (*(ip)->li_ops->iop_committed)(ip, lsn)
 161 #define IOP_PUSH(ip)            (*(ip)->li_ops->iop_push)(ip)
 162 #define IOP_PUSHBUF(ip)         (*(ip)->li_ops->iop_pushbuf)(ip)
 163 #define IOP_COMMITTING(ip, lsn) (*(ip)->li_ops->iop_committing)(ip, lsn)
 164
 165 /*
 166  * Return values for the IOP_TRYLOCK() routines.
 167  */
 168 #define XFS_ITEM_SUCCESS        0
 169 #define XFS_ITEM_PINNED         1
 170 #define XFS_ITEM_LOCKED         2
 171 #define XFS_ITEM_FLUSHING       3
 172 #define XFS_ITEM_PUSHBUF        4
 173
 174 #endif  /* __KERNEL__ */
 175
 176 /*
 177  * This structure is used to track log items associated with
 178  * a transaction.  It points to the log item and keeps some
 179  * flags to track the state of the log item.  It also tracks
 180  * the amount of space needed to log the item it describes
 181  * once we get to commit processing (see xfs_trans_commit()).
 182  */
 183 typedef struct xfs_log_item_desc {
 184         xfs_log_item_t  *lid_item;
 185         ushort          lid_size;
 186         unsigned char   lid_flags;
 187         unsigned char   lid_index;
 188 } xfs_log_item_desc_t;
 189
 190 #define XFS_LID_DIRTY           0x1
 191 #define XFS_LID_PINNED          0x2
 192 #define XFS_LID_BUF_STALE       0x8
 193
 194 /*
 195  * This structure is used to maintain a chunk list of log_item_desc
 196  * structures. The free field is a bitmask indicating which descriptors
 197  * in this chunk's array are free.  The unused field is the first value
 198  * not used since this chunk was allocated.
 199  */
 200 #define XFS_LIC_NUM_SLOTS       15
 201 typedef struct xfs_log_item_chunk {
 202         struct xfs_log_item_chunk       *lic_next;
 203         ushort                          lic_free;
 204         ushort                          lic_unused;
 205         xfs_log_item_desc_t             lic_descs[XFS_LIC_NUM_SLOTS];
 206 } xfs_log_item_chunk_t;
 207
 208 #define XFS_LIC_MAX_SLOT        (XFS_LIC_NUM_SLOTS - 1)
 209 #define XFS_LIC_FREEMASK        ((1 << XFS_LIC_NUM_SLOTS) - 1)
 210
 211
 212 /*
 213  * Initialize the given chunk.  Set the chunk's free descriptor mask
 214  * to indicate that all descriptors are free.  The caller gets to set
 215  * lic_unused to the right value (0 matches all free).  The
 216  * lic_descs.lid_index values are set up as each desc is allocated.
 217  */
 218 #define XFS_LIC_INIT(cp)        xfs_lic_init(cp)
 219 static inline void xfs_lic_init(xfs_log_item_chunk_t *cp)
 220 {
 221         cp->lic_free = XFS_LIC_FREEMASK;
 222 }
 223
 224 #define XFS_LIC_INIT_SLOT(cp,slot)      xfs_lic_init_slot(cp, slot)
 225 static inline void xfs_lic_init_slot(xfs_log_item_chunk_t *cp, int slot)
 226 {
 227         cp->lic_descs[slot].lid_index = (unsigned char)(slot);
 228 }
 229
 230 #define XFS_LIC_VACANCY(cp)             xfs_lic_vacancy(cp)
 231 static inline int xfs_lic_vacancy(xfs_log_item_chunk_t *cp)
 232 {
 233         return cp->lic_free & XFS_LIC_FREEMASK;
 234 }
 235
 236 #define XFS_LIC_ALL_FREE(cp)            xfs_lic_all_free(cp)
 237 static inline void xfs_lic_all_free(xfs_log_item_chunk_t *cp)
 238 {
 239         cp->lic_free = XFS_LIC_FREEMASK;
 240 }
 241
 242 #define XFS_LIC_ARE_ALL_FREE(cp)        xfs_lic_are_all_free(cp)
 243 static inline int xfs_lic_are_all_free(xfs_log_item_chunk_t *cp)
 244 {
 245         return ((cp->lic_free & XFS_LIC_FREEMASK) == XFS_LIC_FREEMASK);
 246 }
 247
 248 #define XFS_LIC_ISFREE(cp,slot) xfs_lic_isfree(cp,slot)
 249 static inline int xfs_lic_isfree(xfs_log_item_chunk_t *cp, int slot)
 250 {
 251         return (cp->lic_free & (1 << slot));
 252 }
 253
 254 #define XFS_LIC_CLAIM(cp,slot)          xfs_lic_claim(cp,slot)
 255 static inline void xfs_lic_claim(xfs_log_item_chunk_t *cp, int slot)
 256 {
 257         cp->lic_free &= ~(1 << slot);
 258 }
 259
 260 #define XFS_LIC_RELSE(cp,slot)          xfs_lic_relse(cp,slot)
 261 static inline void xfs_lic_relse(xfs_log_item_chunk_t *cp, int slot)
 262 {
 263         cp->lic_free |= 1 << slot;
 264 }
 265
 266 #define XFS_LIC_SLOT(cp,slot)           xfs_lic_slot(cp,slot)
 267 static inline xfs_log_item_desc_t *
 268 xfs_lic_slot(xfs_log_item_chunk_t *cp, int slot)
 269 {
 270         return &(cp->lic_descs[slot]);
 271 }
 272
 273 #define XFS_LIC_DESC_TO_SLOT(dp)        xfs_lic_desc_to_slot(dp)
 274 static inline int xfs_lic_desc_to_slot(xfs_log_item_desc_t *dp)
 275 {
 276         return (uint)dp->lid_index;
 277 }
 278
 279 /*
 280  * Calculate the address of a chunk given a descriptor pointer:
 281  * dp - dp->lid_index give the address of the start of the lic_descs array.
 282  * From this we subtract the offset of the lic_descs field in a chunk.
 283  * All of this yields the address of the chunk, which is
 284  * cast to a chunk pointer.
 285  */
 286 #define XFS_LIC_DESC_TO_CHUNK(dp)       xfs_lic_desc_to_chunk(dp)
 287 static inline xfs_log_item_chunk_t *
 288 xfs_lic_desc_to_chunk(xfs_log_item_desc_t *dp)
 289 {
 290         return (xfs_log_item_chunk_t*) \
 291                 (((xfs_caddr_t)((dp) - (dp)->lid_index)) - \
 292                 (xfs_caddr_t)(((xfs_log_item_chunk_t*)0)->lic_descs));
 293 }
 294
 295 #ifdef __KERNEL__
 296 /*
 297  * This structure is used to maintain a list of block ranges that have been
 298  * freed in the transaction.  The ranges are listed in the perag[] busy list
 299  * between when they're freed and the transaction is committed to disk.
 300  */
 301
 302 typedef struct xfs_log_busy_slot {
 303         xfs_agnumber_t          lbc_ag;
 304         ushort                  lbc_idx;        /* index in perag.busy[] */
 305 } xfs_log_busy_slot_t;
 306
 307 #define XFS_LBC_NUM_SLOTS       31
 308 typedef struct xfs_log_busy_chunk {
 309         struct xfs_log_busy_chunk       *lbc_next;
 310         uint                            lbc_free;       /* free slots bitmask */
 311         ushort                          lbc_unused;     /* first unused */
 312         xfs_log_busy_slot_t             lbc_busy[XFS_LBC_NUM_SLOTS];
 313 } xfs_log_busy_chunk_t;
 314
 315 #define XFS_LBC_MAX_SLOT        (XFS_LBC_NUM_SLOTS - 1)
 316 #define XFS_LBC_FREEMASK        ((1U << XFS_LBC_NUM_SLOTS) - 1)
 317
 318 #define XFS_LBC_INIT(cp)        ((cp)->lbc_free = XFS_LBC_FREEMASK)
 319 #define XFS_LBC_CLAIM(cp, slot) ((cp)->lbc_free &= ~(1 << (slot)))
 320 #define XFS_LBC_SLOT(cp, slot)  (&((cp)->lbc_busy[(slot)]))
 321 #define XFS_LBC_VACANCY(cp)     (((cp)->lbc_free) & XFS_LBC_FREEMASK)
 322 #define XFS_LBC_ISFREE(cp, slot) ((cp)->lbc_free & (1 << (slot)))
 323
 324 /*
 325  * This is the type of function which can be given to xfs_trans_callback()
 326  * to be called upon the transaction's commit to disk.
 327  */
 328 typedef void (*xfs_trans_callback_t)(struct xfs_trans *, void *);
 329
 330 /*
 331  * This is the structure maintained for every active transaction.
 332  */
 333 typedef struct xfs_trans {
 334         unsigned int            t_magic;        /* magic number */
 335         xfs_log_callback_t      t_logcb;        /* log callback struct */
 336         unsigned int            t_type;         /* transaction type */
 337         unsigned int            t_log_res;      /* amt of log space resvd */
 338         unsigned int            t_log_count;    /* count for perm log res */
 339         unsigned int            t_blk_res;      /* # of blocks resvd */
 340         unsigned int            t_blk_res_used; /* # of resvd blocks used */
 341         unsigned int            t_rtx_res;      /* # of rt extents resvd */
 342         unsigned int            t_rtx_res_used; /* # of resvd rt extents used */
 343         xfs_log_ticket_t        t_ticket;       /* log mgr ticket */
 344         sema_t                  t_sema;         /* sema for commit completion */
 345         xfs_lsn_t               t_lsn;          /* log seq num of start of
 346                                                  * transaction. */
 347         xfs_lsn_t               t_commit_lsn;   /* log seq num of end of
 348                                                  * transaction. */
 349         struct xfs_mount        *t_mountp;      /* ptr to fs mount struct */
 350         struct xfs_dquot_acct   *t_dqinfo;      /* acctg info for dquots */
 351         xfs_trans_callback_t    t_callback;     /* transaction callback */
 352         void                    *t_callarg;     /* callback arg */
 353         unsigned int            t_flags;        /* misc flags */
 354         int64_t                 t_icount_delta; /* superblock icount change */
 355         int64_t                 t_ifree_delta;  /* superblock ifree change */
 356         int64_t                 t_fdblocks_delta; /* superblock fdblocks chg */
 357         int64_t                 t_res_fdblocks_delta; /* on-disk only chg */
 358         int64_t                 t_frextents_delta;/* superblock freextents chg*/
 359         int64_t                 t_res_frextents_delta; /* on-disk only chg */
 360 #ifdef DEBUG
 361         int64_t                 t_ag_freeblks_delta; /* debugging counter */
 362         int64_t                 t_ag_flist_delta; /* debugging counter */
 363         int64_t                 t_ag_btree_delta; /* debugging counter */
 364 #endif
 365         int64_t                 t_dblocks_delta;/* superblock dblocks change */
 366         int64_t                 t_agcount_delta;/* superblock agcount change */
 367         int64_t                 t_imaxpct_delta;/* superblock imaxpct change */
 368         int64_t                 t_rextsize_delta;/* superblock rextsize chg */
 369         int64_t                 t_rbmblocks_delta;/* superblock rbmblocks chg */
 370         int64_t                 t_rblocks_delta;/* superblock rblocks change */
 371         int64_t                 t_rextents_delta;/* superblocks rextents chg */
 372         int64_t                 t_rextslog_delta;/* superblocks rextslog chg */
 373         unsigned int            t_items_free;   /* log item descs free */
 374         xfs_log_item_chunk_t    t_items;        /* first log item desc chunk */
 375         xfs_trans_header_t      t_header;       /* header for in-log trans */
 376         unsigned int            t_busy_free;    /* busy descs free */
 377         xfs_log_busy_chunk_t    t_busy;         /* busy/async free blocks */
 378         unsigned long           t_pflags;       /* saved process flags state */
 379 } xfs_trans_t;
 380
 381 #endif  /* __KERNEL__ */
 382
 383
 384 #define XFS_TRANS_MAGIC         0x5452414E      /* 'TRAN' */
 385 /*
 386  * Values for t_flags.
 387  */
 388 #define XFS_TRANS_DIRTY         0x01    /* something needs to be logged */
 389 #define XFS_TRANS_SB_DIRTY      0x02    /* superblock is modified */
 390 #define XFS_TRANS_PERM_LOG_RES  0x04    /* xact took a permanent log res */
 391 #define XFS_TRANS_SYNC          0x08    /* make commit synchronous */
 392 #define XFS_TRANS_DQ_DIRTY      0x10    /* at least one dquot in trx dirty */
 393 #define XFS_TRANS_RESERVE       0x20    /* OK to use reserved data blocks */
 394
 395 /*
 396  * Values for call flags parameter.
 397  */
 398 #define XFS_TRANS_NOSLEEP               0x1
 399 #define XFS_TRANS_WAIT                  0x2
 400 #define XFS_TRANS_RELEASE_LOG_RES       0x4
 401 #define XFS_TRANS_ABORT                 0x8
 402
 403 /*
 404  * Field values for xfs_trans_mod_sb.
 405  */
 406 #define XFS_TRANS_SB_ICOUNT             0x00000001
 407 #define XFS_TRANS_SB_IFREE              0x00000002
 408 #define XFS_TRANS_SB_FDBLOCKS           0x00000004
 409 #define XFS_TRANS_SB_RES_FDBLOCKS       0x00000008
 410 #define XFS_TRANS_SB_FREXTENTS          0x00000010
 411 #define XFS_TRANS_SB_RES_FREXTENTS      0x00000020
 412 #define XFS_TRANS_SB_DBLOCKS            0x00000040
 413 #define XFS_TRANS_SB_AGCOUNT            0x00000080
 414 #define XFS_TRANS_SB_IMAXPCT            0x00000100
 415 #define XFS_TRANS_SB_REXTSIZE           0x00000200
 416 #define XFS_TRANS_SB_RBMBLOCKS          0x00000400
 417 #define XFS_TRANS_SB_RBLOCKS            0x00000800
 418 #define XFS_TRANS_SB_REXTENTS           0x00001000
 419 #define XFS_TRANS_SB_REXTSLOG           0x00002000
 420
 421
 422 /*
 423  * Various log reservation values.
 424  * These are based on the size of the file system block
 425  * because that is what most transactions manipulate.
 426  * Each adds in an additional 128 bytes per item logged to
 427  * try to account for the overhead of the transaction mechanism.
 428  *
 429  * Note:
 430  * Most of the reservations underestimate the number of allocation
 431  * groups into which they could free extents in the xfs_bmap_finish()
 432  * call.  This is because the number in the worst case is quite high
 433  * and quite unusual.  In order to fix this we need to change
 434  * xfs_bmap_finish() to free extents in only a single AG at a time.
 435  * This will require changes to the EFI code as well, however, so that
 436  * the EFI for the extents not freed is logged again in each transaction.
 437  * See bug 261917.
 438  */
 439
 440 /*
 441  * Per-extent log reservation for the allocation btree changes
 442  * involved in freeing or allocating an extent.
 443  * 2 trees * (2 blocks/level * max depth - 1) * block size
 444  */
 445 #define XFS_ALLOCFREE_LOG_RES(mp,nx) \
 446         ((nx) * (2 * XFS_FSB_TO_B((mp), 2 * XFS_AG_MAXLEVELS(mp) - 1)))
 447 #define XFS_ALLOCFREE_LOG_COUNT(mp,nx) \
 448         ((nx) * (2 * (2 * XFS_AG_MAXLEVELS(mp) - 1)))
 449
 450 /*
 451  * Per-directory log reservation for any directory change.
 452  * dir blocks: (1 btree block per level + data block + free block) * dblock size
 453  * bmap btree: (levels + 2) * max depth * block size
 454  * v2 directory blocks can be fragmented below the dirblksize down to the fsb
 455  * size, so account for that in the DAENTER macros.
 456  */
 457 #define XFS_DIROP_LOG_RES(mp)   \
 458         (XFS_FSB_TO_B(mp, XFS_DAENTER_BLOCKS(mp, XFS_DATA_FORK)) + \
 459          (XFS_FSB_TO_B(mp, XFS_DAENTER_BMAPS(mp, XFS_DATA_FORK) + 1)))
 460 #define XFS_DIROP_LOG_COUNT(mp) \
 461         (XFS_DAENTER_BLOCKS(mp, XFS_DATA_FORK) + \
 462          XFS_DAENTER_BMAPS(mp, XFS_DATA_FORK) + 1)
 463
 464 /*
 465  * In a write transaction we can allocate a maximum of 2
 466  * extents.  This gives:
 467  *    the inode getting the new extents: inode size
 468  *    the inode\'s bmap btree: max depth * block size
 469  *    the agfs of the ags from which the extents are allocated: 2 * sector
 470  *    the superblock free block counter: sector size
 471  *    the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size
 472  * And the bmap_finish transaction can free bmap blocks in a join:
 473  *    the agfs of the ags containing the blocks: 2 * sector size
 474  *    the agfls of the ags containing the blocks: 2 * sector size
 475  *    the super block free block counter: sector size
 476  *    the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size
 477  */
 478 #define XFS_CALC_WRITE_LOG_RES(mp) \
 479         (MAX( \
 480          ((mp)->m_sb.sb_inodesize + \
 481           XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK)) + \
 482           (2 * (mp)->m_sb.sb_sectsize) + \
 483           (mp)->m_sb.sb_sectsize + \
 484           XFS_ALLOCFREE_LOG_RES(mp, 2) + \
 485           (128 * (4 + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) + XFS_ALLOCFREE_LOG_COUNT(mp, 2)))),\
 486          ((2 * (mp)->m_sb.sb_sectsize) + \
 487           (2 * (mp)->m_sb.sb_sectsize) + \
 488           (mp)->m_sb.sb_sectsize + \
 489           XFS_ALLOCFREE_LOG_RES(mp, 2) + \
 490           (128 * (5 + XFS_ALLOCFREE_LOG_COUNT(mp, 2))))))
 491
 492 #define XFS_WRITE_LOG_RES(mp)   ((mp)->m_reservations.tr_write)
 493
 494 /*
 495  * In truncating a file we free up to two extents at once.  We can modify:
 496  *    the inode being truncated: inode size
 497  *    the inode\'s bmap btree: (max depth + 1) * block size
 498  * And the bmap_finish transaction can free the blocks and bmap blocks:
 499  *    the agf for each of the ags: 4 * sector size
 500  *    the agfl for each of the ags: 4 * sector size
 501  *    the super block to reflect the freed blocks: sector size
 502  *    worst case split in allocation btrees per extent assuming 4 extents:
 503  *              4 exts * 2 trees * (2 * max depth - 1) * block size
 504  *    the inode btree: max depth * blocksize
 505  *    the allocation btrees: 2 trees * (max depth - 1) * block size
 506  */
 507 #define XFS_CALC_ITRUNCATE_LOG_RES(mp) \
 508         (MAX( \
 509          ((mp)->m_sb.sb_inodesize + \
 510           XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) + 1) + \
 511           (128 * (2 + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK)))), \
 512          ((4 * (mp)->m_sb.sb_sectsize) + \
 513           (4 * (mp)->m_sb.sb_sectsize) + \
 514           (mp)->m_sb.sb_sectsize + \
 515           XFS_ALLOCFREE_LOG_RES(mp, 4) + \
 516           (128 * (9 + XFS_ALLOCFREE_LOG_COUNT(mp, 4))) + \
 517           (128 * 5) + \
 518           XFS_ALLOCFREE_LOG_RES(mp, 1) + \
 519            (128 * (2 + XFS_IALLOC_BLOCKS(mp) + XFS_IN_MAXLEVELS(mp) + \
 520             XFS_ALLOCFREE_LOG_COUNT(mp, 1))))))
 521
 522 #define XFS_ITRUNCATE_LOG_RES(mp)   ((mp)->m_reservations.tr_itruncate)
 523
 524 /*
 525  * In renaming a files we can modify:
 526  *    the four inodes involved: 4 * inode size
 527  *    the two directory btrees: 2 * (max depth + v2) * dir block size
 528  *    the two directory bmap btrees: 2 * max depth * block size
 529  * And the bmap_finish transaction can free dir and bmap blocks (two sets
 530  *      of bmap blocks) giving:
 531  *    the agf for the ags in which the blocks live: 3 * sector size
 532  *    the agfl for the ags in which the blocks live: 3 * sector size
 533  *    the superblock for the free block count: sector size
 534  *    the allocation btrees: 3 exts * 2 trees * (2 * max depth - 1) * block size
 535  */
 536 #define XFS_CALC_RENAME_LOG_RES(mp) \
 537         (MAX( \
 538          ((4 * (mp)->m_sb.sb_inodesize) + \
 539           (2 * XFS_DIROP_LOG_RES(mp)) + \
 540           (128 * (4 + 2 * XFS_DIROP_LOG_COUNT(mp)))), \
 541          ((3 * (mp)->m_sb.sb_sectsize) + \
 542           (3 * (mp)->m_sb.sb_sectsize) + \
 543           (mp)->m_sb.sb_sectsize + \
 544           XFS_ALLOCFREE_LOG_RES(mp, 3) + \
 545           (128 * (7 + XFS_ALLOCFREE_LOG_COUNT(mp, 3))))))
 546
 547 #define XFS_RENAME_LOG_RES(mp)  ((mp)->m_reservations.tr_rename)
 548
 549 /*
 550  * For creating a link to an inode:
 551  *    the parent directory inode: inode size
 552  *    the linked inode: inode size
 553  *    the directory btree could split: (max depth + v2) * dir block size
 554  *    the directory bmap btree could join or split: (max depth + v2) * blocksize
 555  * And the bmap_finish transaction can free some bmap blocks giving:
 556  *    the agf for the ag in which the blocks live: sector size
 557  *    the agfl for the ag in which the blocks live: sector size
 558  *    the superblock for the free block count: sector size
 559  *    the allocation btrees: 2 trees * (2 * max depth - 1) * block size
 560  */
 561 #define XFS_CALC_LINK_LOG_RES(mp) \
 562         (MAX( \
 563          ((mp)->m_sb.sb_inodesize + \
 564           (mp)->m_sb.sb_inodesize + \
 565           XFS_DIROP_LOG_RES(mp) + \
 566           (128 * (2 + XFS_DIROP_LOG_COUNT(mp)))), \
 567          ((mp)->m_sb.sb_sectsize + \
 568           (mp)->m_sb.sb_sectsize + \
 569           (mp)->m_sb.sb_sectsize + \
 570           XFS_ALLOCFREE_LOG_RES(mp, 1) + \
 571           (128 * (3 + XFS_ALLOCFREE_LOG_COUNT(mp, 1))))))
 572
 573 #define XFS_LINK_LOG_RES(mp)    ((mp)->m_reservations.tr_link)
 574
 575 /*
 576  * For removing a directory entry we can modify:
 577  *    the parent directory inode: inode size
 578  *    the removed inode: inode size
 579  *    the directory btree could join: (max depth + v2) * dir block size
 580  *    the directory bmap btree could join or split: (max depth + v2) * blocksize
 581  * And the bmap_finish transaction can free the dir and bmap blocks giving:
 582  *    the agf for the ag in which the blocks live: 2 * sector size
 583  *    the agfl for the ag in which the blocks live: 2 * sector size
 584  *    the superblock for the free block count: sector size
 585  *    the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size
 586  */
 587 #define XFS_CALC_REMOVE_LOG_RES(mp)     \
 588         (MAX( \
 589          ((mp)->m_sb.sb_inodesize + \
 590           (mp)->m_sb.sb_inodesize + \
 591           XFS_DIROP_LOG_RES(mp) + \
 592           (128 * (2 + XFS_DIROP_LOG_COUNT(mp)))), \
 593          ((2 * (mp)->m_sb.sb_sectsize) + \
 594           (2 * (mp)->m_sb.sb_sectsize) + \
 595           (mp)->m_sb.sb_sectsize + \
 596           XFS_ALLOCFREE_LOG_RES(mp, 2) + \
 597           (128 * (5 + XFS_ALLOCFREE_LOG_COUNT(mp, 2))))))
 598
 599 #define XFS_REMOVE_LOG_RES(mp)  ((mp)->m_reservations.tr_remove)
 600
 601 /*
 602  * For symlink we can modify:
 603  *    the parent directory inode: inode size
 604  *    the new inode: inode size
 605  *    the inode btree entry: 1 block
 606  *    the directory btree: (max depth + v2) * dir block size
 607  *    the directory inode\'s bmap btree: (max depth + v2) * block size
 608  *    the blocks for the symlink: 1 KB
 609  * Or in the first xact we allocate some inodes giving:
 610  *    the agi and agf of the ag getting the new inodes: 2 * sectorsize
 611  *    the inode blocks allocated: XFS_IALLOC_BLOCKS * blocksize
 612  *    the inode btree: max depth * blocksize
 613  *    the allocation btrees: 2 trees * (2 * max depth - 1) * block size
 614  */
 615 #define XFS_CALC_SYMLINK_LOG_RES(mp)            \
 616         (MAX( \
 617          ((mp)->m_sb.sb_inodesize + \
 618           (mp)->m_sb.sb_inodesize + \
 619           XFS_FSB_TO_B(mp, 1) + \
 620           XFS_DIROP_LOG_RES(mp) + \
 621           1024 + \
 622           (128 * (4 + XFS_DIROP_LOG_COUNT(mp)))), \
 623          (2 * (mp)->m_sb.sb_sectsize + \
 624           XFS_FSB_TO_B((mp), XFS_IALLOC_BLOCKS((mp))) + \
 625           XFS_FSB_TO_B((mp), XFS_IN_MAXLEVELS(mp)) + \
 626           XFS_ALLOCFREE_LOG_RES(mp, 1) + \
 627           (128 * (2 + XFS_IALLOC_BLOCKS(mp) + XFS_IN_MAXLEVELS(mp) + \
 628            XFS_ALLOCFREE_LOG_COUNT(mp, 1))))))
 629
 630 #define XFS_SYMLINK_LOG_RES(mp) ((mp)->m_reservations.tr_symlink)
 631
 632 /*
 633  * For create we can modify:
 634  *    the parent directory inode: inode size
 635  *    the new inode: inode size
 636  *    the inode btree entry: block size
 637  *    the superblock for the nlink flag: sector size
 638  *    the directory btree: (max depth + v2) * dir block size
 639  *    the directory inode\'s bmap btree: (max depth + v2) * block size
 640  * Or in the first xact we allocate some inodes giving:
 641  *    the agi and agf of the ag getting the new inodes: 2 * sectorsize
 642  *    the superblock for the nlink flag: sector size
 643  *    the inode blocks allocated: XFS_IALLOC_BLOCKS * blocksize
 644  *    the inode btree: max depth * blocksize
 645  *    the allocation btrees: 2 trees * (max depth - 1) * block size
 646  */
 647 #define XFS_CALC_CREATE_LOG_RES(mp)             \
 648         (MAX( \
 649          ((mp)->m_sb.sb_inodesize + \
 650           (mp)->m_sb.sb_inodesize + \
 651           (mp)->m_sb.sb_sectsize + \
 652           XFS_FSB_TO_B(mp, 1) + \
 653           XFS_DIROP_LOG_RES(mp) + \
 654           (128 * (3 + XFS_DIROP_LOG_COUNT(mp)))), \
 655          (3 * (mp)->m_sb.sb_sectsize + \
 656           XFS_FSB_TO_B((mp), XFS_IALLOC_BLOCKS((mp))) + \
 657           XFS_FSB_TO_B((mp), XFS_IN_MAXLEVELS(mp)) + \
 658           XFS_ALLOCFREE_LOG_RES(mp, 1) + \
 659           (128 * (2 + XFS_IALLOC_BLOCKS(mp) + XFS_IN_MAXLEVELS(mp) + \
 660            XFS_ALLOCFREE_LOG_COUNT(mp, 1))))))
 661
 662 #define XFS_CREATE_LOG_RES(mp)  ((mp)->m_reservations.tr_create)
 663
 664 /*
 665  * Making a new directory is the same as creating a new file.
 666  */
 667 #define XFS_CALC_MKDIR_LOG_RES(mp)      XFS_CALC_CREATE_LOG_RES(mp)
 668
 669 #define XFS_MKDIR_LOG_RES(mp)   ((mp)->m_reservations.tr_mkdir)
 670
 671 /*
 672  * In freeing an inode we can modify:
 673  *    the inode being freed: inode size
 674  *    the super block free inode counter: sector size
 675  *    the agi hash list and counters: sector size
 676  *    the inode btree entry: block size
 677  *    the on disk inode before ours in the agi hash list: inode cluster size
 678  *    the inode btree: max depth * blocksize
 679  *    the allocation btrees: 2 trees * (max depth - 1) * block size
 680  */
 681 #define XFS_CALC_IFREE_LOG_RES(mp) \
 682         ((mp)->m_sb.sb_inodesize + \
 683          (mp)->m_sb.sb_sectsize + \
 684          (mp)->m_sb.sb_sectsize + \
 685          XFS_FSB_TO_B((mp), 1) + \
 686          MAX((__uint16_t)XFS_FSB_TO_B((mp), 1), XFS_INODE_CLUSTER_SIZE(mp)) + \
 687          (128 * 5) + \
 688           XFS_ALLOCFREE_LOG_RES(mp, 1) + \
 689           (128 * (2 + XFS_IALLOC_BLOCKS(mp) + XFS_IN_MAXLEVELS(mp) + \
 690            XFS_ALLOCFREE_LOG_COUNT(mp, 1))))
 691
 692
 693 #define XFS_IFREE_LOG_RES(mp)   ((mp)->m_reservations.tr_ifree)
 694
 695 /*
 696  * When only changing the inode we log the inode and possibly the superblock
 697  * We also add a bit of slop for the transaction stuff.
 698  */
 699 #define XFS_CALC_ICHANGE_LOG_RES(mp)    ((mp)->m_sb.sb_inodesize + \
 700                                          (mp)->m_sb.sb_sectsize + 512)
 701
 702 #define XFS_ICHANGE_LOG_RES(mp) ((mp)->m_reservations.tr_ichange)
 703
 704 /*
 705  * Growing the data section of the filesystem.
 706  *      superblock
 707  *      agi and agf
 708  *      allocation btrees
 709  */
 710 #define XFS_CALC_GROWDATA_LOG_RES(mp) \
 711         ((mp)->m_sb.sb_sectsize * 3 + \
 712          XFS_ALLOCFREE_LOG_RES(mp, 1) + \
 713          (128 * (3 + XFS_ALLOCFREE_LOG_COUNT(mp, 1))))
 714
 715 #define XFS_GROWDATA_LOG_RES(mp)    ((mp)->m_reservations.tr_growdata)
 716
 717 /*
 718  * Growing the rt section of the filesystem.
 719  * In the first set of transactions (ALLOC) we allocate space to the
 720  * bitmap or summary files.
 721  *      superblock: sector size
 722  *      agf of the ag from which the extent is allocated: sector size
 723  *      bmap btree for bitmap/summary inode: max depth * blocksize
 724  *      bitmap/summary inode: inode size
 725  *      allocation btrees for 1 block alloc: 2 * (2 * maxdepth - 1) * blocksize
 726  */
 727 #define XFS_CALC_GROWRTALLOC_LOG_RES(mp) \
 728         (2 * (mp)->m_sb.sb_sectsize + \
 729          XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK)) + \
 730          (mp)->m_sb.sb_inodesize + \
 731          XFS_ALLOCFREE_LOG_RES(mp, 1) + \
 732          (128 * \
 733           (3 + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) + \
 734            XFS_ALLOCFREE_LOG_COUNT(mp, 1))))
 735
 736 #define XFS_GROWRTALLOC_LOG_RES(mp)     ((mp)->m_reservations.tr_growrtalloc)
 737
 738 /*
 739  * Growing the rt section of the filesystem.
 740  * In the second set of transactions (ZERO) we zero the new metadata blocks.
 741  *      one bitmap/summary block: blocksize
 742  */
 743 #define XFS_CALC_GROWRTZERO_LOG_RES(mp) \
 744         ((mp)->m_sb.sb_blocksize + 128)
 745
 746 #define XFS_GROWRTZERO_LOG_RES(mp)      ((mp)->m_reservations.tr_growrtzero)
 747
 748 /*
 749  * Growing the rt section of the filesystem.
 750  * In the third set of transactions (FREE) we update metadata without
 751  * allocating any new blocks.
 752  *      superblock: sector size
 753  *      bitmap inode: inode size
 754  *      summary inode: inode size
 755  *      one bitmap block: blocksize
 756  *      summary blocks: new summary size
 757  */
 758 #define XFS_CALC_GROWRTFREE_LOG_RES(mp) \
 759         ((mp)->m_sb.sb_sectsize + \
 760          2 * (mp)->m_sb.sb_inodesize + \
 761          (mp)->m_sb.sb_blocksize + \
 762          (mp)->m_rsumsize + \
 763          (128 * 5))
 764
 765 #define XFS_GROWRTFREE_LOG_RES(mp)      ((mp)->m_reservations.tr_growrtfree)
 766
 767 /*
 768  * Logging the inode modification timestamp on a synchronous write.
 769  *      inode
 770  */
 771 #define XFS_CALC_SWRITE_LOG_RES(mp) \
 772         ((mp)->m_sb.sb_inodesize + 128)
 773
 774 #define XFS_SWRITE_LOG_RES(mp)  ((mp)->m_reservations.tr_swrite)
 775
 776 /*
 777  * Logging the inode timestamps on an fsync -- same as SWRITE
 778  * as long as SWRITE logs the entire inode core
 779  */
 780 #define XFS_FSYNC_TS_LOG_RES(mp)        ((mp)->m_reservations.tr_swrite)
 781
 782 /*
 783  * Logging the inode mode bits when writing a setuid/setgid file
 784  *      inode
 785  */
 786 #define XFS_CALC_WRITEID_LOG_RES(mp) \
 787         ((mp)->m_sb.sb_inodesize + 128)
 788
 789 #define XFS_WRITEID_LOG_RES(mp) ((mp)->m_reservations.tr_swrite)
 790
 791 /*
 792  * Converting the inode from non-attributed to attributed.
 793  *      the inode being converted: inode size
 794  *      agf block and superblock (for block allocation)
 795  *      the new block (directory sized)
 796  *      bmap blocks for the new directory block
 797  *      allocation btrees
 798  */
 799 #define XFS_CALC_ADDAFORK_LOG_RES(mp)   \
 800         ((mp)->m_sb.sb_inodesize + \
 801          (mp)->m_sb.sb_sectsize * 2 + \
 802          (mp)->m_dirblksize + \
 803          XFS_FSB_TO_B(mp, (XFS_DAENTER_BMAP1B(mp, XFS_DATA_FORK) + 1)) + \
 804          XFS_ALLOCFREE_LOG_RES(mp, 1) + \
 805          (128 * (4 + (XFS_DAENTER_BMAP1B(mp, XFS_DATA_FORK) + 1) + \
 806                  XFS_ALLOCFREE_LOG_COUNT(mp, 1))))
 807
 808 #define XFS_ADDAFORK_LOG_RES(mp)        ((mp)->m_reservations.tr_addafork)
 809
 810 /*
 811  * Removing the attribute fork of a file
 812  *    the inode being truncated: inode size
 813  *    the inode\'s bmap btree: max depth * block size
 814  * And the bmap_finish transaction can free the blocks and bmap blocks:
 815  *    the agf for each of the ags: 4 * sector size
 816  *    the agfl for each of the ags: 4 * sector size
 817  *    the super block to reflect the freed blocks: sector size
 818  *    worst case split in allocation btrees per extent assuming 4 extents:
 819  *              4 exts * 2 trees * (2 * max depth - 1) * block size
 820  */
 821 #define XFS_CALC_ATTRINVAL_LOG_RES(mp)  \
 822         (MAX( \
 823          ((mp)->m_sb.sb_inodesize + \
 824           XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK)) + \
 825           (128 * (1 + XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK)))), \
 826          ((4 * (mp)->m_sb.sb_sectsize) + \
 827           (4 * (mp)->m_sb.sb_sectsize) + \
 828           (mp)->m_sb.sb_sectsize + \
 829           XFS_ALLOCFREE_LOG_RES(mp, 4) + \
 830           (128 * (9 + XFS_ALLOCFREE_LOG_COUNT(mp, 4))))))
 831
 832 #define XFS_ATTRINVAL_LOG_RES(mp)       ((mp)->m_reservations.tr_attrinval)
 833
 834 /*
 835  * Setting an attribute.
 836  *      the inode getting the attribute
 837  *      the superblock for allocations
 838  *      the agfs extents are allocated from
 839  *      the attribute btree * max depth
 840  *      the inode allocation btree
 841  * Since attribute transaction space is dependent on the size of the attribute,
 842  * the calculation is done partially at mount time and partially at runtime.
 843  */
 844 #define XFS_CALC_ATTRSET_LOG_RES(mp)    \
 845         ((mp)->m_sb.sb_inodesize + \
 846          (mp)->m_sb.sb_sectsize + \
 847           XFS_FSB_TO_B((mp), XFS_DA_NODE_MAXDEPTH) + \
 848           (128 * (2 + XFS_DA_NODE_MAXDEPTH)))
 849
 850 #define XFS_ATTRSET_LOG_RES(mp, ext)    \
 851         ((mp)->m_reservations.tr_attrset + \
 852          (ext * (mp)->m_sb.sb_sectsize) + \
 853          (ext * XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK))) + \
 854          (128 * (ext + (ext * XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK)))))
 855
 856 /*
 857  * Removing an attribute.
 858  *    the inode: inode size
 859  *    the attribute btree could join: max depth * block size
 860  *    the inode bmap btree could join or split: max depth * block size
 861  * And the bmap_finish transaction can free the attr blocks freed giving:
 862  *    the agf for the ag in which the blocks live: 2 * sector size
 863  *    the agfl for the ag in which the blocks live: 2 * sector size
 864  *    the superblock for the free block count: sector size
 865  *    the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size
 866  */
 867 #define XFS_CALC_ATTRRM_LOG_RES(mp)     \
 868         (MAX( \
 869           ((mp)->m_sb.sb_inodesize + \
 870           XFS_FSB_TO_B((mp), XFS_DA_NODE_MAXDEPTH) + \
 871           XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK)) + \
 872           (128 * (1 + XFS_DA_NODE_MAXDEPTH + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK)))), \
 873          ((2 * (mp)->m_sb.sb_sectsize) + \
 874           (2 * (mp)->m_sb.sb_sectsize) + \
 875           (mp)->m_sb.sb_sectsize + \
 876           XFS_ALLOCFREE_LOG_RES(mp, 2) + \
 877           (128 * (5 + XFS_ALLOCFREE_LOG_COUNT(mp, 2))))))
 878
 879 #define XFS_ATTRRM_LOG_RES(mp)  ((mp)->m_reservations.tr_attrrm)
 880
 881 /*
 882  * Clearing a bad agino number in an agi hash bucket.
 883  */
 884 #define XFS_CALC_CLEAR_AGI_BUCKET_LOG_RES(mp) \
 885         ((mp)->m_sb.sb_sectsize + 128)
 886
 887 #define XFS_CLEAR_AGI_BUCKET_LOG_RES(mp)  ((mp)->m_reservations.tr_clearagi)
 888
 889
 890 /*
 891  * Various log count values.
 892  */
 893 #define XFS_DEFAULT_LOG_COUNT           1
 894 #define XFS_DEFAULT_PERM_LOG_COUNT      2
 895 #define XFS_ITRUNCATE_LOG_COUNT         2
 896 #define XFS_INACTIVE_LOG_COUNT          2
 897 #define XFS_CREATE_LOG_COUNT            2
 898 #define XFS_MKDIR_LOG_COUNT             3
 899 #define XFS_SYMLINK_LOG_COUNT           3
 900 #define XFS_REMOVE_LOG_COUNT            2
 901 #define XFS_LINK_LOG_COUNT              2
 902 #define XFS_RENAME_LOG_COUNT            2
 903 #define XFS_WRITE_LOG_COUNT             2
 904 #define XFS_ADDAFORK_LOG_COUNT          2
 905 #define XFS_ATTRINVAL_LOG_COUNT         1
 906 #define XFS_ATTRSET_LOG_COUNT           3
 907 #define XFS_ATTRRM_LOG_COUNT            3
 908
 909 /*
 910  * Here we centralize the specification of XFS meta-data buffer
 911  * reference count values.  This determine how hard the buffer
 912  * cache tries to hold onto the buffer.
 913  */
 914 #define XFS_AGF_REF             4
 915 #define XFS_AGI_REF             4
 916 #define XFS_AGFL_REF            3
 917 #define XFS_INO_BTREE_REF       3
 918 #define XFS_ALLOC_BTREE_REF     2
 919 #define XFS_BMAP_BTREE_REF      2
 920 #define XFS_DIR_BTREE_REF       2
 921 #define XFS_ATTR_BTREE_REF      1
 922 #define XFS_INO_REF             1
 923 #define XFS_DQUOT_REF           1
 924
 925 #ifdef __KERNEL__
 926 /*
 927  * XFS transaction mechanism exported interfaces that are
 928  * actually macros.
 929  */
 930 #define xfs_trans_get_log_res(tp)       ((tp)->t_log_res)
 931 #define xfs_trans_get_log_count(tp)     ((tp)->t_log_count)
 932 #define xfs_trans_get_block_res(tp)     ((tp)->t_blk_res)
 933 #define xfs_trans_set_sync(tp)          ((tp)->t_flags |= XFS_TRANS_SYNC)
 934
 935 #ifdef DEBUG
 936 #define xfs_trans_agblocks_delta(tp, d) ((tp)->t_ag_freeblks_delta += (int64_t)d)
 937 #define xfs_trans_agflist_delta(tp, d)  ((tp)->t_ag_flist_delta += (int64_t)d)
 938 #define xfs_trans_agbtree_delta(tp, d)  ((tp)->t_ag_btree_delta += (int64_t)d)
 939 #else
 940 #define xfs_trans_agblocks_delta(tp, d)
 941 #define xfs_trans_agflist_delta(tp, d)
 942 #define xfs_trans_agbtree_delta(tp, d)
 943 #endif
 944
 945 /*
 946  * XFS transaction mechanism exported interfaces.
 947  */
 948 void            xfs_trans_init(struct xfs_mount *);
 949 xfs_trans_t     *xfs_trans_alloc(struct xfs_mount *, uint);
 950 xfs_trans_t     *_xfs_trans_alloc(struct xfs_mount *, uint);
 951 xfs_trans_t     *xfs_trans_dup(xfs_trans_t *);
 952 int             xfs_trans_reserve(xfs_trans_t *, uint, uint, uint,
 953                                   uint, uint);
 954 void            xfs_trans_mod_sb(xfs_trans_t *, uint, int64_t);
 955 struct xfs_buf  *xfs_trans_get_buf(xfs_trans_t *, struct xfs_buftarg *, xfs_daddr_t,
 956                                    int, uint);
 957 int             xfs_trans_read_buf(struct xfs_mount *, xfs_trans_t *,
 958                                    struct xfs_buftarg *, xfs_daddr_t, int, uint,
 959                                    struct xfs_buf **);
 960 struct xfs_buf  *xfs_trans_getsb(xfs_trans_t *, struct xfs_mount *, int);
 961
 962 void            xfs_trans_brelse(xfs_trans_t *, struct xfs_buf *);
 963 void            xfs_trans_bjoin(xfs_trans_t *, struct xfs_buf *);
 964 void            xfs_trans_bhold(xfs_trans_t *, struct xfs_buf *);
 965 void            xfs_trans_bhold_release(xfs_trans_t *, struct xfs_buf *);
 966 void            xfs_trans_binval(xfs_trans_t *, struct xfs_buf *);
 967 void            xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *);
 968 void            xfs_trans_stale_inode_buf(xfs_trans_t *, struct xfs_buf *);
 969 void            xfs_trans_dquot_buf(xfs_trans_t *, struct xfs_buf *, uint);
 970 void            xfs_trans_inode_alloc_buf(xfs_trans_t *, struct xfs_buf *);
 971 int             xfs_trans_iget(struct xfs_mount *, xfs_trans_t *,
 972                                xfs_ino_t , uint, uint, struct xfs_inode **);
 973 void            xfs_trans_ijoin(xfs_trans_t *, struct xfs_inode *, uint);
 974 void            xfs_trans_ihold(xfs_trans_t *, struct xfs_inode *);
 975 void            xfs_trans_log_buf(xfs_trans_t *, struct xfs_buf *, uint, uint);
 976 void            xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint);
 977 struct xfs_efi_log_item *xfs_trans_get_efi(xfs_trans_t *, uint);
 978 void            xfs_efi_release(struct xfs_efi_log_item *, uint);
 979 void            xfs_trans_log_efi_extent(xfs_trans_t *,
 980                                          struct xfs_efi_log_item *,
 981                                          xfs_fsblock_t,
 982                                          xfs_extlen_t);
 983 struct xfs_efd_log_item *xfs_trans_get_efd(xfs_trans_t *,
 984                                   struct xfs_efi_log_item *,
 985                                   uint);
 986 void            xfs_trans_log_efd_extent(xfs_trans_t *,
 987                                          struct xfs_efd_log_item *,
 988                                          xfs_fsblock_t,
 989                                          xfs_extlen_t);
 990 int             _xfs_trans_commit(xfs_trans_t *,
 991                                   uint flags,
 992                                   int *);
 993 #define xfs_trans_commit(tp, flags)     _xfs_trans_commit(tp, flags, NULL)
 994 void            xfs_trans_cancel(xfs_trans_t *, int);
 995 int             xfs_trans_ail_init(struct xfs_mount *);
 996 void            xfs_trans_ail_destroy(struct xfs_mount *);
 997 void            xfs_trans_push_ail(struct xfs_mount *, xfs_lsn_t);
 998 xfs_lsn_t       xfs_trans_tail_ail(struct xfs_mount *);
 999 void            xfs_trans_unlocked_item(struct xfs_mount *,
1000                                         xfs_log_item_t *);
1001 xfs_log_busy_slot_t *xfs_trans_add_busy(xfs_trans_t *tp,
1002                                         xfs_agnumber_t ag,
1003                                         xfs_extlen_t idx);
1004
1005 extern kmem_zone_t      *xfs_trans_zone;
1006
1007 #endif  /* __KERNEL__ */
1008
1009 #endif  /* __XFS_TRANS_H__ */