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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /fs/xfs/xfs_trans.h
downloadlinux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.bz2
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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+/*
+ * Copyright (c) 2000-2002 Silicon Graphics, Inc. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like. Any license provided herein, whether implied or
+ * otherwise, applies only to this software file. Patent licenses, if
+ * any, provided herein do not apply to combinations of this program with
+ * other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write the Free Software Foundation, Inc., 59
+ * Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ *
+ * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
+ * Mountain View, CA 94043, or:
+ *
+ * http://www.sgi.com
+ *
+ * For further information regarding this notice, see:
+ *
+ * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
+ */
+#ifndef __XFS_TRANS_H__
+#define __XFS_TRANS_H__
+
+/*
+ * This is the structure written in the log at the head of
+ * every transaction. It identifies the type and id of the
+ * transaction, and contains the number of items logged by
+ * the transaction so we know how many to expect during recovery.
+ *
+ * Do not change the below structure without redoing the code in
+ * xlog_recover_add_to_trans() and xlog_recover_add_to_cont_trans().
+ */
+typedef struct xfs_trans_header {
+ uint th_magic; /* magic number */
+ uint th_type; /* transaction type */
+ __int32_t th_tid; /* transaction id (unused) */
+ uint th_num_items; /* num items logged by trans */
+} xfs_trans_header_t;
+
+#define XFS_TRANS_HEADER_MAGIC 0x5452414e /* TRAN */
+
+/*
+ * Log item types.
+ */
+#define XFS_LI_5_3_BUF 0x1234 /* v1 bufs, 1-block inode buffers */
+#define XFS_LI_5_3_INODE 0x1235 /* 1-block inode buffers */
+#define XFS_LI_EFI 0x1236
+#define XFS_LI_EFD 0x1237
+#define XFS_LI_IUNLINK 0x1238
+#define XFS_LI_6_1_INODE 0x1239 /* 4K non-aligned inode bufs */
+#define XFS_LI_6_1_BUF 0x123a /* v1, 4K inode buffers */
+#define XFS_LI_INODE 0x123b /* aligned ino chunks, var-size ibufs */
+#define XFS_LI_BUF 0x123c /* v2 bufs, variable sized inode bufs */
+#define XFS_LI_DQUOT 0x123d
+#define XFS_LI_QUOTAOFF 0x123e
+
+/*
+ * Transaction types. Used to distinguish types of buffers.
+ */
+#define XFS_TRANS_SETATTR_NOT_SIZE 1
+#define XFS_TRANS_SETATTR_SIZE 2
+#define XFS_TRANS_INACTIVE 3
+#define XFS_TRANS_CREATE 4
+#define XFS_TRANS_CREATE_TRUNC 5
+#define XFS_TRANS_TRUNCATE_FILE 6
+#define XFS_TRANS_REMOVE 7
+#define XFS_TRANS_LINK 8
+#define XFS_TRANS_RENAME 9
+#define XFS_TRANS_MKDIR 10
+#define XFS_TRANS_RMDIR 11
+#define XFS_TRANS_SYMLINK 12
+#define XFS_TRANS_SET_DMATTRS 13
+#define XFS_TRANS_GROWFS 14
+#define XFS_TRANS_STRAT_WRITE 15
+#define XFS_TRANS_DIOSTRAT 16
+#define XFS_TRANS_WRITE_SYNC 17
+#define XFS_TRANS_WRITEID 18
+#define XFS_TRANS_ADDAFORK 19
+#define XFS_TRANS_ATTRINVAL 20
+#define XFS_TRANS_ATRUNCATE 21
+#define XFS_TRANS_ATTR_SET 22
+#define XFS_TRANS_ATTR_RM 23
+#define XFS_TRANS_ATTR_FLAG 24
+#define XFS_TRANS_CLEAR_AGI_BUCKET 25
+#define XFS_TRANS_QM_SBCHANGE 26
+/*
+ * Dummy entries since we use the transaction type to index into the
+ * trans_type[] in xlog_recover_print_trans_head()
+ */
+#define XFS_TRANS_DUMMY1 27
+#define XFS_TRANS_DUMMY2 28
+#define XFS_TRANS_QM_QUOTAOFF 29
+#define XFS_TRANS_QM_DQALLOC 30
+#define XFS_TRANS_QM_SETQLIM 31
+#define XFS_TRANS_QM_DQCLUSTER 32
+#define XFS_TRANS_QM_QINOCREATE 33
+#define XFS_TRANS_QM_QUOTAOFF_END 34
+#define XFS_TRANS_SB_UNIT 35
+#define XFS_TRANS_FSYNC_TS 36
+#define XFS_TRANS_GROWFSRT_ALLOC 37
+#define XFS_TRANS_GROWFSRT_ZERO 38
+#define XFS_TRANS_GROWFSRT_FREE 39
+#define XFS_TRANS_SWAPEXT 40
+/* new transaction types need to be reflected in xfs_logprint(8) */
+
+
+#ifdef __KERNEL__
+struct xfs_buf;
+struct xfs_buftarg;
+struct xfs_efd_log_item;
+struct xfs_efi_log_item;
+struct xfs_inode;
+struct xfs_item_ops;
+struct xfs_log_iovec;
+struct xfs_log_item;
+struct xfs_log_item_desc;
+struct xfs_mount;
+struct xfs_trans;
+struct xfs_dquot_acct;
+
+typedef struct xfs_ail_entry {
+ struct xfs_log_item *ail_forw; /* AIL forw pointer */
+ struct xfs_log_item *ail_back; /* AIL back pointer */
+} xfs_ail_entry_t;
+
+/*
+ * This structure is passed as a parameter to xfs_trans_push_ail()
+ * and is used to track the what LSN the waiting processes are
+ * waiting to become unused.
+ */
+typedef struct xfs_ail_ticket {
+ xfs_lsn_t at_lsn; /* lsn waitin for */
+ struct xfs_ail_ticket *at_forw; /* wait list ptr */
+ struct xfs_ail_ticket *at_back; /* wait list ptr */
+ sv_t at_sema; /* wait sema */
+} xfs_ail_ticket_t;
+
+
+typedef struct xfs_log_item {
+ xfs_ail_entry_t li_ail; /* AIL pointers */
+ xfs_lsn_t li_lsn; /* last on-disk lsn */
+ struct xfs_log_item_desc *li_desc; /* ptr to current desc*/
+ struct xfs_mount *li_mountp; /* ptr to fs mount */
+ uint li_type; /* item type */
+ uint li_flags; /* misc flags */
+ struct xfs_log_item *li_bio_list; /* buffer item list */
+ void (*li_cb)(struct xfs_buf *,
+ struct xfs_log_item *);
+ /* buffer item iodone */
+ /* callback func */
+ struct xfs_item_ops *li_ops; /* function list */
+} xfs_log_item_t;
+
+#define XFS_LI_IN_AIL 0x1
+#define XFS_LI_ABORTED 0x2
+
+typedef struct xfs_item_ops {
+ uint (*iop_size)(xfs_log_item_t *);
+ void (*iop_format)(xfs_log_item_t *, struct xfs_log_iovec *);
+ void (*iop_pin)(xfs_log_item_t *);
+ void (*iop_unpin)(xfs_log_item_t *, int);
+ void (*iop_unpin_remove)(xfs_log_item_t *, struct xfs_trans *);
+ uint (*iop_trylock)(xfs_log_item_t *);
+ void (*iop_unlock)(xfs_log_item_t *);
+ xfs_lsn_t (*iop_committed)(xfs_log_item_t *, xfs_lsn_t);
+ void (*iop_push)(xfs_log_item_t *);
+ void (*iop_abort)(xfs_log_item_t *);
+ void (*iop_pushbuf)(xfs_log_item_t *);
+ void (*iop_committing)(xfs_log_item_t *, xfs_lsn_t);
+} xfs_item_ops_t;
+
+#define IOP_SIZE(ip) (*(ip)->li_ops->iop_size)(ip)
+#define IOP_FORMAT(ip,vp) (*(ip)->li_ops->iop_format)(ip, vp)
+#define IOP_PIN(ip) (*(ip)->li_ops->iop_pin)(ip)
+#define IOP_UNPIN(ip, flags) (*(ip)->li_ops->iop_unpin)(ip, flags)
+#define IOP_UNPIN_REMOVE(ip,tp) (*(ip)->li_ops->iop_unpin_remove)(ip, tp)
+#define IOP_TRYLOCK(ip) (*(ip)->li_ops->iop_trylock)(ip)
+#define IOP_UNLOCK(ip) (*(ip)->li_ops->iop_unlock)(ip)
+#define IOP_COMMITTED(ip, lsn) (*(ip)->li_ops->iop_committed)(ip, lsn)
+#define IOP_PUSH(ip) (*(ip)->li_ops->iop_push)(ip)
+#define IOP_ABORT(ip) (*(ip)->li_ops->iop_abort)(ip)
+#define IOP_PUSHBUF(ip) (*(ip)->li_ops->iop_pushbuf)(ip)
+#define IOP_COMMITTING(ip, lsn) (*(ip)->li_ops->iop_committing)(ip, lsn)
+
+/*
+ * Return values for the IOP_TRYLOCK() routines.
+ */
+#define XFS_ITEM_SUCCESS 0
+#define XFS_ITEM_PINNED 1
+#define XFS_ITEM_LOCKED 2
+#define XFS_ITEM_FLUSHING 3
+#define XFS_ITEM_PUSHBUF 4
+
+#endif /* __KERNEL__ */
+
+/*
+ * This structure is used to track log items associated with
+ * a transaction. It points to the log item and keeps some
+ * flags to track the state of the log item. It also tracks
+ * the amount of space needed to log the item it describes
+ * once we get to commit processing (see xfs_trans_commit()).
+ */
+typedef struct xfs_log_item_desc {
+ xfs_log_item_t *lid_item;
+ ushort lid_size;
+ unsigned char lid_flags;
+ unsigned char lid_index;
+} xfs_log_item_desc_t;
+
+#define XFS_LID_DIRTY 0x1
+#define XFS_LID_PINNED 0x2
+#define XFS_LID_BUF_STALE 0x8
+
+/*
+ * This structure is used to maintain a chunk list of log_item_desc
+ * structures. The free field is a bitmask indicating which descriptors
+ * in this chunk's array are free. The unused field is the first value
+ * not used since this chunk was allocated.
+ */
+#define XFS_LIC_NUM_SLOTS 15
+typedef struct xfs_log_item_chunk {
+ struct xfs_log_item_chunk *lic_next;
+ ushort lic_free;
+ ushort lic_unused;
+ xfs_log_item_desc_t lic_descs[XFS_LIC_NUM_SLOTS];
+} xfs_log_item_chunk_t;
+
+#define XFS_LIC_MAX_SLOT (XFS_LIC_NUM_SLOTS - 1)
+#define XFS_LIC_FREEMASK ((1 << XFS_LIC_NUM_SLOTS) - 1)
+
+
+/*
+ * Initialize the given chunk. Set the chunk's free descriptor mask
+ * to indicate that all descriptors are free. The caller gets to set
+ * lic_unused to the right value (0 matches all free). The
+ * lic_descs.lid_index values are set up as each desc is allocated.
+ */
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_LIC_INIT)
+void xfs_lic_init(xfs_log_item_chunk_t *cp);
+#define XFS_LIC_INIT(cp) xfs_lic_init(cp)
+#else
+#define XFS_LIC_INIT(cp) ((cp)->lic_free = XFS_LIC_FREEMASK)
+#endif
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_LIC_INIT_SLOT)
+void xfs_lic_init_slot(xfs_log_item_chunk_t *cp, int slot);
+#define XFS_LIC_INIT_SLOT(cp,slot) xfs_lic_init_slot(cp, slot)
+#else
+#define XFS_LIC_INIT_SLOT(cp,slot) \
+ ((cp)->lic_descs[slot].lid_index = (unsigned char)(slot))
+#endif
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_LIC_VACANCY)
+int xfs_lic_vacancy(xfs_log_item_chunk_t *cp);
+#define XFS_LIC_VACANCY(cp) xfs_lic_vacancy(cp)
+#else
+#define XFS_LIC_VACANCY(cp) (((cp)->lic_free) & XFS_LIC_FREEMASK)
+#endif
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_LIC_ALL_FREE)
+void xfs_lic_all_free(xfs_log_item_chunk_t *cp);
+#define XFS_LIC_ALL_FREE(cp) xfs_lic_all_free(cp)
+#else
+#define XFS_LIC_ALL_FREE(cp) ((cp)->lic_free = XFS_LIC_FREEMASK)
+#endif
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_LIC_ARE_ALL_FREE)
+int xfs_lic_are_all_free(xfs_log_item_chunk_t *cp);
+#define XFS_LIC_ARE_ALL_FREE(cp) xfs_lic_are_all_free(cp)
+#else
+#define XFS_LIC_ARE_ALL_FREE(cp) (((cp)->lic_free & XFS_LIC_FREEMASK) ==\
+ XFS_LIC_FREEMASK)
+#endif
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_LIC_ISFREE)
+int xfs_lic_isfree(xfs_log_item_chunk_t *cp, int slot);
+#define XFS_LIC_ISFREE(cp,slot) xfs_lic_isfree(cp,slot)
+#else
+#define XFS_LIC_ISFREE(cp,slot) ((cp)->lic_free & (1 << (slot)))
+#endif
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_LIC_CLAIM)
+void xfs_lic_claim(xfs_log_item_chunk_t *cp, int slot);
+#define XFS_LIC_CLAIM(cp,slot) xfs_lic_claim(cp,slot)
+#else
+#define XFS_LIC_CLAIM(cp,slot) ((cp)->lic_free &= ~(1 << (slot)))
+#endif
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_LIC_RELSE)
+void xfs_lic_relse(xfs_log_item_chunk_t *cp, int slot);
+#define XFS_LIC_RELSE(cp,slot) xfs_lic_relse(cp,slot)
+#else
+#define XFS_LIC_RELSE(cp,slot) ((cp)->lic_free |= 1 << (slot))
+#endif
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_LIC_SLOT)
+xfs_log_item_desc_t *xfs_lic_slot(xfs_log_item_chunk_t *cp, int slot);
+#define XFS_LIC_SLOT(cp,slot) xfs_lic_slot(cp,slot)
+#else
+#define XFS_LIC_SLOT(cp,slot) (&((cp)->lic_descs[slot]))
+#endif
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_LIC_DESC_TO_SLOT)
+int xfs_lic_desc_to_slot(xfs_log_item_desc_t *dp);
+#define XFS_LIC_DESC_TO_SLOT(dp) xfs_lic_desc_to_slot(dp)
+#else
+#define XFS_LIC_DESC_TO_SLOT(dp) ((uint)((dp)->lid_index))
+#endif
+/*
+ * Calculate the address of a chunk given a descriptor pointer:
+ * dp - dp->lid_index give the address of the start of the lic_descs array.
+ * From this we subtract the offset of the lic_descs field in a chunk.
+ * All of this yields the address of the chunk, which is
+ * cast to a chunk pointer.
+ */
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_LIC_DESC_TO_CHUNK)
+xfs_log_item_chunk_t *xfs_lic_desc_to_chunk(xfs_log_item_desc_t *dp);
+#define XFS_LIC_DESC_TO_CHUNK(dp) xfs_lic_desc_to_chunk(dp)
+#else
+#define XFS_LIC_DESC_TO_CHUNK(dp) ((xfs_log_item_chunk_t*) \
+ (((xfs_caddr_t)((dp) - (dp)->lid_index)) -\
+ (xfs_caddr_t)(((xfs_log_item_chunk_t*) \
+ 0)->lic_descs)))
+#endif
+
+#ifdef __KERNEL__
+/*
+ * This structure is used to maintain a list of block ranges that have been
+ * freed in the transaction. The ranges are listed in the perag[] busy list
+ * between when they're freed and the transaction is committed to disk.
+ */
+
+typedef struct xfs_log_busy_slot {
+ xfs_agnumber_t lbc_ag;
+ ushort lbc_idx; /* index in perag.busy[] */
+} xfs_log_busy_slot_t;
+
+#define XFS_LBC_NUM_SLOTS 31
+typedef struct xfs_log_busy_chunk {
+ struct xfs_log_busy_chunk *lbc_next;
+ uint lbc_free; /* bitmask of free slots */
+ ushort lbc_unused; /* first unused */
+ xfs_log_busy_slot_t lbc_busy[XFS_LBC_NUM_SLOTS];
+} xfs_log_busy_chunk_t;
+
+#define XFS_LBC_MAX_SLOT (XFS_LBC_NUM_SLOTS - 1)
+#define XFS_LBC_FREEMASK ((1U << XFS_LBC_NUM_SLOTS) - 1)
+
+#define XFS_LBC_INIT(cp) ((cp)->lbc_free = XFS_LBC_FREEMASK)
+#define XFS_LBC_CLAIM(cp, slot) ((cp)->lbc_free &= ~(1 << (slot)))
+#define XFS_LBC_SLOT(cp, slot) (&((cp)->lbc_busy[(slot)]))
+#define XFS_LBC_VACANCY(cp) (((cp)->lbc_free) & XFS_LBC_FREEMASK)
+#define XFS_LBC_ISFREE(cp, slot) ((cp)->lbc_free & (1 << (slot)))
+
+/*
+ * This is the type of function which can be given to xfs_trans_callback()
+ * to be called upon the transaction's commit to disk.
+ */
+typedef void (*xfs_trans_callback_t)(struct xfs_trans *, void *);
+
+/*
+ * This is the structure maintained for every active transaction.
+ */
+typedef struct xfs_trans {
+ unsigned int t_magic; /* magic number */
+ xfs_log_callback_t t_logcb; /* log callback struct */
+ struct xfs_trans *t_forw; /* async list pointers */
+ struct xfs_trans *t_back; /* async list pointers */
+ unsigned int t_type; /* transaction type */
+ unsigned int t_log_res; /* amt of log space resvd */
+ unsigned int t_log_count; /* count for perm log res */
+ unsigned int t_blk_res; /* # of blocks resvd */
+ unsigned int t_blk_res_used; /* # of resvd blocks used */
+ unsigned int t_rtx_res; /* # of rt extents resvd */
+ unsigned int t_rtx_res_used; /* # of resvd rt extents used */
+ xfs_log_ticket_t t_ticket; /* log mgr ticket */
+ sema_t t_sema; /* sema for commit completion */
+ xfs_lsn_t t_lsn; /* log seq num of start of
+ * transaction. */
+ xfs_lsn_t t_commit_lsn; /* log seq num of end of
+ * transaction. */
+ struct xfs_mount *t_mountp; /* ptr to fs mount struct */
+ struct xfs_dquot_acct *t_dqinfo; /* accting info for dquots */
+ xfs_trans_callback_t t_callback; /* transaction callback */
+ void *t_callarg; /* callback arg */
+ unsigned int t_flags; /* misc flags */
+ long t_icount_delta; /* superblock icount change */
+ long t_ifree_delta; /* superblock ifree change */
+ long t_fdblocks_delta; /* superblock fdblocks chg */
+ long t_res_fdblocks_delta; /* on-disk only chg */
+ long t_frextents_delta;/* superblock freextents chg*/
+ long t_res_frextents_delta; /* on-disk only chg */
+ long t_ag_freeblks_delta; /* debugging counter */
+ long t_ag_flist_delta; /* debugging counter */
+ long t_ag_btree_delta; /* debugging counter */
+ long t_dblocks_delta;/* superblock dblocks change */
+ long t_agcount_delta;/* superblock agcount change */
+ long t_imaxpct_delta;/* superblock imaxpct change */
+ long t_rextsize_delta;/* superblock rextsize chg */
+ long t_rbmblocks_delta;/* superblock rbmblocks chg */
+ long t_rblocks_delta;/* superblock rblocks change */
+ long t_rextents_delta;/* superblocks rextents chg */
+ long t_rextslog_delta;/* superblocks rextslog chg */
+ unsigned int t_items_free; /* log item descs free */
+ xfs_log_item_chunk_t t_items; /* first log item desc chunk */
+ xfs_trans_header_t t_header; /* header for in-log trans */
+ unsigned int t_busy_free; /* busy descs free */
+ xfs_log_busy_chunk_t t_busy; /* busy/async free blocks */
+ xfs_pflags_t t_pflags; /* saved pflags state */
+} xfs_trans_t;
+
+#endif /* __KERNEL__ */
+
+
+#define XFS_TRANS_MAGIC 0x5452414E /* 'TRAN' */
+/*
+ * Values for t_flags.
+ */
+#define XFS_TRANS_DIRTY 0x01 /* something needs to be logged */
+#define XFS_TRANS_SB_DIRTY 0x02 /* superblock is modified */
+#define XFS_TRANS_PERM_LOG_RES 0x04 /* xact took a permanent log res */
+#define XFS_TRANS_SYNC 0x08 /* make commit synchronous */
+#define XFS_TRANS_DQ_DIRTY 0x10 /* at least one dquot in trx dirty */
+#define XFS_TRANS_RESERVE 0x20 /* OK to use reserved data blocks */
+
+/*
+ * Values for call flags parameter.
+ */
+#define XFS_TRANS_NOSLEEP 0x1
+#define XFS_TRANS_WAIT 0x2
+#define XFS_TRANS_RELEASE_LOG_RES 0x4
+#define XFS_TRANS_ABORT 0x8
+
+/*
+ * Field values for xfs_trans_mod_sb.
+ */
+#define XFS_TRANS_SB_ICOUNT 0x00000001
+#define XFS_TRANS_SB_IFREE 0x00000002
+#define XFS_TRANS_SB_FDBLOCKS 0x00000004
+#define XFS_TRANS_SB_RES_FDBLOCKS 0x00000008
+#define XFS_TRANS_SB_FREXTENTS 0x00000010
+#define XFS_TRANS_SB_RES_FREXTENTS 0x00000020
+#define XFS_TRANS_SB_DBLOCKS 0x00000040
+#define XFS_TRANS_SB_AGCOUNT 0x00000080
+#define XFS_TRANS_SB_IMAXPCT 0x00000100
+#define XFS_TRANS_SB_REXTSIZE 0x00000200
+#define XFS_TRANS_SB_RBMBLOCKS 0x00000400
+#define XFS_TRANS_SB_RBLOCKS 0x00000800
+#define XFS_TRANS_SB_REXTENTS 0x00001000
+#define XFS_TRANS_SB_REXTSLOG 0x00002000
+
+
+/*
+ * Various log reservation values.
+ * These are based on the size of the file system block
+ * because that is what most transactions manipulate.
+ * Each adds in an additional 128 bytes per item logged to
+ * try to account for the overhead of the transaction mechanism.
+ *
+ * Note:
+ * Most of the reservations underestimate the number of allocation
+ * groups into which they could free extents in the xfs_bmap_finish()
+ * call. This is because the number in the worst case is quite high
+ * and quite unusual. In order to fix this we need to change
+ * xfs_bmap_finish() to free extents in only a single AG at a time.
+ * This will require changes to the EFI code as well, however, so that
+ * the EFI for the extents not freed is logged again in each transaction.
+ * See bug 261917.
+ */
+
+/*
+ * Per-extent log reservation for the allocation btree changes
+ * involved in freeing or allocating an extent.
+ * 2 trees * (2 blocks/level * max depth - 1) * block size
+ */
+#define XFS_ALLOCFREE_LOG_RES(mp,nx) \
+ ((nx) * (2 * XFS_FSB_TO_B((mp), 2 * XFS_AG_MAXLEVELS(mp) - 1)))
+#define XFS_ALLOCFREE_LOG_COUNT(mp,nx) \
+ ((nx) * (2 * (2 * XFS_AG_MAXLEVELS(mp) - 1)))
+
+/*
+ * Per-directory log reservation for any directory change.
+ * dir blocks: (1 btree block per level + data block + free block) * dblock size
+ * bmap btree: (levels + 2) * max depth * block size
+ * v2 directory blocks can be fragmented below the dirblksize down to the fsb
+ * size, so account for that in the DAENTER macros.
+ */
+#define XFS_DIROP_LOG_RES(mp) \
+ (XFS_FSB_TO_B(mp, XFS_DAENTER_BLOCKS(mp, XFS_DATA_FORK)) + \
+ (XFS_FSB_TO_B(mp, XFS_DAENTER_BMAPS(mp, XFS_DATA_FORK) + 1)))
+#define XFS_DIROP_LOG_COUNT(mp) \
+ (XFS_DAENTER_BLOCKS(mp, XFS_DATA_FORK) + \
+ XFS_DAENTER_BMAPS(mp, XFS_DATA_FORK) + 1)
+
+/*
+ * In a write transaction we can allocate a maximum of 2
+ * extents. This gives:
+ * the inode getting the new extents: inode size
+ * the inode\'s bmap btree: max depth * block size
+ * the agfs of the ags from which the extents are allocated: 2 * sector
+ * the superblock free block counter: sector size
+ * the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size
+ * And the bmap_finish transaction can free bmap blocks in a join:
+ * the agfs of the ags containing the blocks: 2 * sector size
+ * the agfls of the ags containing the blocks: 2 * sector size
+ * the super block free block counter: sector size
+ * the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size
+ */
+#define XFS_CALC_WRITE_LOG_RES(mp) \
+ (MAX( \
+ ((mp)->m_sb.sb_inodesize + \
+ XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK)) + \
+ (2 * (mp)->m_sb.sb_sectsize) + \
+ (mp)->m_sb.sb_sectsize + \
+ XFS_ALLOCFREE_LOG_RES(mp, 2) + \
+ (128 * (4 + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) + XFS_ALLOCFREE_LOG_COUNT(mp, 2)))),\
+ ((2 * (mp)->m_sb.sb_sectsize) + \
+ (2 * (mp)->m_sb.sb_sectsize) + \
+ (mp)->m_sb.sb_sectsize + \
+ XFS_ALLOCFREE_LOG_RES(mp, 2) + \
+ (128 * (5 + XFS_ALLOCFREE_LOG_COUNT(mp, 2))))))
+
+#define XFS_WRITE_LOG_RES(mp) ((mp)->m_reservations.tr_write)
+
+/*
+ * In truncating a file we free up to two extents at once. We can modify:
+ * the inode being truncated: inode size
+ * the inode\'s bmap btree: (max depth + 1) * block size
+ * And the bmap_finish transaction can free the blocks and bmap blocks:
+ * the agf for each of the ags: 4 * sector size
+ * the agfl for each of the ags: 4 * sector size
+ * the super block to reflect the freed blocks: sector size
+ * worst case split in allocation btrees per extent assuming 4 extents:
+ * 4 exts * 2 trees * (2 * max depth - 1) * block size
+ * the inode btree: max depth * blocksize
+ * the allocation btrees: 2 trees * (max depth - 1) * block size
+ */
+#define XFS_CALC_ITRUNCATE_LOG_RES(mp) \
+ (MAX( \
+ ((mp)->m_sb.sb_inodesize + \
+ XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) + 1) + \
+ (128 * (2 + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK)))), \
+ ((4 * (mp)->m_sb.sb_sectsize) + \
+ (4 * (mp)->m_sb.sb_sectsize) + \
+ (mp)->m_sb.sb_sectsize + \
+ XFS_ALLOCFREE_LOG_RES(mp, 4) + \
+ (128 * (9 + XFS_ALLOCFREE_LOG_COUNT(mp, 4))) + \
+ (128 * 5) + \
+ XFS_ALLOCFREE_LOG_RES(mp, 1) + \
+ (128 * (2 + XFS_IALLOC_BLOCKS(mp) + XFS_IN_MAXLEVELS(mp) + \
+ XFS_ALLOCFREE_LOG_COUNT(mp, 1))))))
+
+#define XFS_ITRUNCATE_LOG_RES(mp) ((mp)->m_reservations.tr_itruncate)
+
+/*
+ * In renaming a files we can modify:
+ * the four inodes involved: 4 * inode size
+ * the two directory btrees: 2 * (max depth + v2) * dir block size
+ * the two directory bmap btrees: 2 * max depth * block size
+ * And the bmap_finish transaction can free dir and bmap blocks (two sets
+ * of bmap blocks) giving:
+ * the agf for the ags in which the blocks live: 3 * sector size
+ * the agfl for the ags in which the blocks live: 3 * sector size
+ * the superblock for the free block count: sector size
+ * the allocation btrees: 3 exts * 2 trees * (2 * max depth - 1) * block size
+ */
+#define XFS_CALC_RENAME_LOG_RES(mp) \
+ (MAX( \
+ ((4 * (mp)->m_sb.sb_inodesize) + \
+ (2 * XFS_DIROP_LOG_RES(mp)) + \
+ (128 * (4 + 2 * XFS_DIROP_LOG_COUNT(mp)))), \
+ ((3 * (mp)->m_sb.sb_sectsize) + \
+ (3 * (mp)->m_sb.sb_sectsize) + \
+ (mp)->m_sb.sb_sectsize + \
+ XFS_ALLOCFREE_LOG_RES(mp, 3) + \
+ (128 * (7 + XFS_ALLOCFREE_LOG_COUNT(mp, 3))))))
+
+#define XFS_RENAME_LOG_RES(mp) ((mp)->m_reservations.tr_rename)
+
+/*
+ * For creating a link to an inode:
+ * the parent directory inode: inode size
+ * the linked inode: inode size
+ * the directory btree could split: (max depth + v2) * dir block size
+ * the directory bmap btree could join or split: (max depth + v2) * blocksize
+ * And the bmap_finish transaction can free some bmap blocks giving:
+ * the agf for the ag in which the blocks live: sector size
+ * the agfl for the ag in which the blocks live: sector size
+ * the superblock for the free block count: sector size
+ * the allocation btrees: 2 trees * (2 * max depth - 1) * block size
+ */
+#define XFS_CALC_LINK_LOG_RES(mp) \
+ (MAX( \
+ ((mp)->m_sb.sb_inodesize + \
+ (mp)->m_sb.sb_inodesize + \
+ XFS_DIROP_LOG_RES(mp) + \
+ (128 * (2 + XFS_DIROP_LOG_COUNT(mp)))), \
+ ((mp)->m_sb.sb_sectsize + \
+ (mp)->m_sb.sb_sectsize + \
+ (mp)->m_sb.sb_sectsize + \
+ XFS_ALLOCFREE_LOG_RES(mp, 1) + \
+ (128 * (3 + XFS_ALLOCFREE_LOG_COUNT(mp, 1))))))
+
+#define XFS_LINK_LOG_RES(mp) ((mp)->m_reservations.tr_link)
+
+/*
+ * For removing a directory entry we can modify:
+ * the parent directory inode: inode size
+ * the removed inode: inode size
+ * the directory btree could join: (max depth + v2) * dir block size
+ * the directory bmap btree could join or split: (max depth + v2) * blocksize
+ * And the bmap_finish transaction can free the dir and bmap blocks giving:
+ * the agf for the ag in which the blocks live: 2 * sector size
+ * the agfl for the ag in which the blocks live: 2 * sector size
+ * the superblock for the free block count: sector size
+ * the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size
+ */
+#define XFS_CALC_REMOVE_LOG_RES(mp) \
+ (MAX( \
+ ((mp)->m_sb.sb_inodesize + \
+ (mp)->m_sb.sb_inodesize + \
+ XFS_DIROP_LOG_RES(mp) + \
+ (128 * (2 + XFS_DIROP_LOG_COUNT(mp)))), \
+ ((2 * (mp)->m_sb.sb_sectsize) + \
+ (2 * (mp)->m_sb.sb_sectsize) + \
+ (mp)->m_sb.sb_sectsize + \
+ XFS_ALLOCFREE_LOG_RES(mp, 2) + \
+ (128 * (5 + XFS_ALLOCFREE_LOG_COUNT(mp, 2))))))
+
+#define XFS_REMOVE_LOG_RES(mp) ((mp)->m_reservations.tr_remove)
+
+/*
+ * For symlink we can modify:
+ * the parent directory inode: inode size
+ * the new inode: inode size
+ * the inode btree entry: 1 block
+ * the directory btree: (max depth + v2) * dir block size
+ * the directory inode\'s bmap btree: (max depth + v2) * block size
+ * the blocks for the symlink: 1 KB
+ * Or in the first xact we allocate some inodes giving:
+ * the agi and agf of the ag getting the new inodes: 2 * sectorsize
+ * the inode blocks allocated: XFS_IALLOC_BLOCKS * blocksize
+ * the inode btree: max depth * blocksize
+ * the allocation btrees: 2 trees * (2 * max depth - 1) * block size
+ */
+#define XFS_CALC_SYMLINK_LOG_RES(mp) \
+ (MAX( \
+ ((mp)->m_sb.sb_inodesize + \
+ (mp)->m_sb.sb_inodesize + \
+ XFS_FSB_TO_B(mp, 1) + \
+ XFS_DIROP_LOG_RES(mp) + \
+ 1024 + \
+ (128 * (4 + XFS_DIROP_LOG_COUNT(mp)))), \
+ (2 * (mp)->m_sb.sb_sectsize + \
+ XFS_FSB_TO_B((mp), XFS_IALLOC_BLOCKS((mp))) + \
+ XFS_FSB_TO_B((mp), XFS_IN_MAXLEVELS(mp)) + \
+ XFS_ALLOCFREE_LOG_RES(mp, 1) + \
+ (128 * (2 + XFS_IALLOC_BLOCKS(mp) + XFS_IN_MAXLEVELS(mp) + \
+ XFS_ALLOCFREE_LOG_COUNT(mp, 1))))))
+
+#define XFS_SYMLINK_LOG_RES(mp) ((mp)->m_reservations.tr_symlink)
+
+/*
+ * For create we can modify:
+ * the parent directory inode: inode size
+ * the new inode: inode size
+ * the inode btree entry: block size
+ * the superblock for the nlink flag: sector size
+ * the directory btree: (max depth + v2) * dir block size
+ * the directory inode\'s bmap btree: (max depth + v2) * block size
+ * Or in the first xact we allocate some inodes giving:
+ * the agi and agf of the ag getting the new inodes: 2 * sectorsize
+ * the superblock for the nlink flag: sector size
+ * the inode blocks allocated: XFS_IALLOC_BLOCKS * blocksize
+ * the inode btree: max depth * blocksize
+ * the allocation btrees: 2 trees * (max depth - 1) * block size
+ */
+#define XFS_CALC_CREATE_LOG_RES(mp) \
+ (MAX( \
+ ((mp)->m_sb.sb_inodesize + \
+ (mp)->m_sb.sb_inodesize + \
+ (mp)->m_sb.sb_sectsize + \
+ XFS_FSB_TO_B(mp, 1) + \
+ XFS_DIROP_LOG_RES(mp) + \
+ (128 * (3 + XFS_DIROP_LOG_COUNT(mp)))), \
+ (3 * (mp)->m_sb.sb_sectsize + \
+ XFS_FSB_TO_B((mp), XFS_IALLOC_BLOCKS((mp))) + \
+ XFS_FSB_TO_B((mp), XFS_IN_MAXLEVELS(mp)) + \
+ XFS_ALLOCFREE_LOG_RES(mp, 1) + \
+ (128 * (2 + XFS_IALLOC_BLOCKS(mp) + XFS_IN_MAXLEVELS(mp) + \
+ XFS_ALLOCFREE_LOG_COUNT(mp, 1))))))
+
+#define XFS_CREATE_LOG_RES(mp) ((mp)->m_reservations.tr_create)
+
+/*
+ * Making a new directory is the same as creating a new file.
+ */
+#define XFS_CALC_MKDIR_LOG_RES(mp) XFS_CALC_CREATE_LOG_RES(mp)
+
+#define XFS_MKDIR_LOG_RES(mp) ((mp)->m_reservations.tr_mkdir)
+
+/*
+ * In freeing an inode we can modify:
+ * the inode being freed: inode size
+ * the super block free inode counter: sector size
+ * the agi hash list and counters: sector size
+ * the inode btree entry: block size
+ * the on disk inode before ours in the agi hash list: inode cluster size
+ * the inode btree: max depth * blocksize
+ * the allocation btrees: 2 trees * (max depth - 1) * block size
+ */
+#define XFS_CALC_IFREE_LOG_RES(mp) \
+ ((mp)->m_sb.sb_inodesize + \
+ (mp)->m_sb.sb_sectsize + \
+ (mp)->m_sb.sb_sectsize + \
+ XFS_FSB_TO_B((mp), 1) + \
+ MAX((__uint16_t)XFS_FSB_TO_B((mp), 1), XFS_INODE_CLUSTER_SIZE(mp)) + \
+ (128 * 5) + \
+ XFS_ALLOCFREE_LOG_RES(mp, 1) + \
+ (128 * (2 + XFS_IALLOC_BLOCKS(mp) + XFS_IN_MAXLEVELS(mp) + \
+ XFS_ALLOCFREE_LOG_COUNT(mp, 1))))
+
+
+#define XFS_IFREE_LOG_RES(mp) ((mp)->m_reservations.tr_ifree)
+
+/*
+ * When only changing the inode we log the inode and possibly the superblock
+ * We also add a bit of slop for the transaction stuff.
+ */
+#define XFS_CALC_ICHANGE_LOG_RES(mp) ((mp)->m_sb.sb_inodesize + \
+ (mp)->m_sb.sb_sectsize + 512)
+
+#define XFS_ICHANGE_LOG_RES(mp) ((mp)->m_reservations.tr_ichange)
+
+/*
+ * Growing the data section of the filesystem.
+ * superblock
+ * agi and agf
+ * allocation btrees
+ */
+#define XFS_CALC_GROWDATA_LOG_RES(mp) \
+ ((mp)->m_sb.sb_sectsize * 3 + \
+ XFS_ALLOCFREE_LOG_RES(mp, 1) + \
+ (128 * (3 + XFS_ALLOCFREE_LOG_COUNT(mp, 1))))
+
+#define XFS_GROWDATA_LOG_RES(mp) ((mp)->m_reservations.tr_growdata)
+
+/*
+ * Growing the rt section of the filesystem.
+ * In the first set of transactions (ALLOC) we allocate space to the
+ * bitmap or summary files.
+ * superblock: sector size
+ * agf of the ag from which the extent is allocated: sector size
+ * bmap btree for bitmap/summary inode: max depth * blocksize
+ * bitmap/summary inode: inode size
+ * allocation btrees for 1 block alloc: 2 * (2 * maxdepth - 1) * blocksize
+ */
+#define XFS_CALC_GROWRTALLOC_LOG_RES(mp) \
+ (2 * (mp)->m_sb.sb_sectsize + \
+ XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK)) + \
+ (mp)->m_sb.sb_inodesize + \
+ XFS_ALLOCFREE_LOG_RES(mp, 1) + \
+ (128 * \
+ (3 + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) + \
+ XFS_ALLOCFREE_LOG_COUNT(mp, 1))))
+
+#define XFS_GROWRTALLOC_LOG_RES(mp) ((mp)->m_reservations.tr_growrtalloc)
+
+/*
+ * Growing the rt section of the filesystem.
+ * In the second set of transactions (ZERO) we zero the new metadata blocks.
+ * one bitmap/summary block: blocksize
+ */
+#define XFS_CALC_GROWRTZERO_LOG_RES(mp) \
+ ((mp)->m_sb.sb_blocksize + 128)
+
+#define XFS_GROWRTZERO_LOG_RES(mp) ((mp)->m_reservations.tr_growrtzero)
+
+/*
+ * Growing the rt section of the filesystem.
+ * In the third set of transactions (FREE) we update metadata without
+ * allocating any new blocks.
+ * superblock: sector size
+ * bitmap inode: inode size
+ * summary inode: inode size
+ * one bitmap block: blocksize
+ * summary blocks: new summary size
+ */
+#define XFS_CALC_GROWRTFREE_LOG_RES(mp) \
+ ((mp)->m_sb.sb_sectsize + \
+ 2 * (mp)->m_sb.sb_inodesize + \
+ (mp)->m_sb.sb_blocksize + \
+ (mp)->m_rsumsize + \
+ (128 * 5))
+
+#define XFS_GROWRTFREE_LOG_RES(mp) ((mp)->m_reservations.tr_growrtfree)
+
+/*
+ * Logging the inode modification timestamp on a synchronous write.
+ * inode
+ */
+#define XFS_CALC_SWRITE_LOG_RES(mp) \
+ ((mp)->m_sb.sb_inodesize + 128)
+
+#define XFS_SWRITE_LOG_RES(mp) ((mp)->m_reservations.tr_swrite)
+
+/*
+ * Logging the inode timestamps on an fsync -- same as SWRITE
+ * as long as SWRITE logs the entire inode core
+ */
+#define XFS_FSYNC_TS_LOG_RES(mp) ((mp)->m_reservations.tr_swrite)
+
+/*
+ * Logging the inode mode bits when writing a setuid/setgid file
+ * inode
+ */
+#define XFS_CALC_WRITEID_LOG_RES(mp) \
+ ((mp)->m_sb.sb_inodesize + 128)
+
+#define XFS_WRITEID_LOG_RES(mp) ((mp)->m_reservations.tr_swrite)
+
+/*
+ * Converting the inode from non-attributed to attributed.
+ * the inode being converted: inode size
+ * agf block and superblock (for block allocation)
+ * the new block (directory sized)
+ * bmap blocks for the new directory block
+ * allocation btrees
+ */
+#define XFS_CALC_ADDAFORK_LOG_RES(mp) \
+ ((mp)->m_sb.sb_inodesize + \
+ (mp)->m_sb.sb_sectsize * 2 + \
+ (mp)->m_dirblksize + \
+ (XFS_DIR_IS_V1(mp) ? 0 : \
+ XFS_FSB_TO_B(mp, (XFS_DAENTER_BMAP1B(mp, XFS_DATA_FORK) + 1))) + \
+ XFS_ALLOCFREE_LOG_RES(mp, 1) + \
+ (128 * (4 + \
+ (XFS_DIR_IS_V1(mp) ? 0 : \
+ XFS_DAENTER_BMAP1B(mp, XFS_DATA_FORK) + 1) + \
+ XFS_ALLOCFREE_LOG_COUNT(mp, 1))))
+
+#define XFS_ADDAFORK_LOG_RES(mp) ((mp)->m_reservations.tr_addafork)
+
+/*
+ * Removing the attribute fork of a file
+ * the inode being truncated: inode size
+ * the inode\'s bmap btree: max depth * block size
+ * And the bmap_finish transaction can free the blocks and bmap blocks:
+ * the agf for each of the ags: 4 * sector size
+ * the agfl for each of the ags: 4 * sector size
+ * the super block to reflect the freed blocks: sector size
+ * worst case split in allocation btrees per extent assuming 4 extents:
+ * 4 exts * 2 trees * (2 * max depth - 1) * block size
+ */
+#define XFS_CALC_ATTRINVAL_LOG_RES(mp) \
+ (MAX( \
+ ((mp)->m_sb.sb_inodesize + \
+ XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK)) + \
+ (128 * (1 + XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK)))), \
+ ((4 * (mp)->m_sb.sb_sectsize) + \
+ (4 * (mp)->m_sb.sb_sectsize) + \
+ (mp)->m_sb.sb_sectsize + \
+ XFS_ALLOCFREE_LOG_RES(mp, 4) + \
+ (128 * (9 + XFS_ALLOCFREE_LOG_COUNT(mp, 4))))))
+
+#define XFS_ATTRINVAL_LOG_RES(mp) ((mp)->m_reservations.tr_attrinval)
+
+/*
+ * Setting an attribute.
+ * the inode getting the attribute
+ * the superblock for allocations
+ * the agfs extents are allocated from
+ * the attribute btree * max depth
+ * the inode allocation btree
+ * Since attribute transaction space is dependent on the size of the attribute,
+ * the calculation is done partially at mount time and partially at runtime.
+ */
+#define XFS_CALC_ATTRSET_LOG_RES(mp) \
+ ((mp)->m_sb.sb_inodesize + \
+ (mp)->m_sb.sb_sectsize + \
+ XFS_FSB_TO_B((mp), XFS_DA_NODE_MAXDEPTH) + \
+ (128 * (2 + XFS_DA_NODE_MAXDEPTH)))
+
+#define XFS_ATTRSET_LOG_RES(mp, ext) \
+ ((mp)->m_reservations.tr_attrset + \
+ (ext * (mp)->m_sb.sb_sectsize) + \
+ (ext * XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK))) + \
+ (128 * (ext + (ext * XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK)))))
+
+/*
+ * Removing an attribute.
+ * the inode: inode size
+ * the attribute btree could join: max depth * block size
+ * the inode bmap btree could join or split: max depth * block size
+ * And the bmap_finish transaction can free the attr blocks freed giving:
+ * the agf for the ag in which the blocks live: 2 * sector size
+ * the agfl for the ag in which the blocks live: 2 * sector size
+ * the superblock for the free block count: sector size
+ * the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size
+ */
+#define XFS_CALC_ATTRRM_LOG_RES(mp) \
+ (MAX( \
+ ((mp)->m_sb.sb_inodesize + \
+ XFS_FSB_TO_B((mp), XFS_DA_NODE_MAXDEPTH) + \
+ XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK)) + \
+ (128 * (1 + XFS_DA_NODE_MAXDEPTH + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK)))), \
+ ((2 * (mp)->m_sb.sb_sectsize) + \
+ (2 * (mp)->m_sb.sb_sectsize) + \
+ (mp)->m_sb.sb_sectsize + \
+ XFS_ALLOCFREE_LOG_RES(mp, 2) + \
+ (128 * (5 + XFS_ALLOCFREE_LOG_COUNT(mp, 2))))))
+
+#define XFS_ATTRRM_LOG_RES(mp) ((mp)->m_reservations.tr_attrrm)
+
+/*
+ * Clearing a bad agino number in an agi hash bucket.
+ */
+#define XFS_CALC_CLEAR_AGI_BUCKET_LOG_RES(mp) \
+ ((mp)->m_sb.sb_sectsize + 128)
+
+#define XFS_CLEAR_AGI_BUCKET_LOG_RES(mp) ((mp)->m_reservations.tr_clearagi)
+
+
+/*
+ * Various log count values.
+ */
+#define XFS_DEFAULT_LOG_COUNT 1
+#define XFS_DEFAULT_PERM_LOG_COUNT 2
+#define XFS_ITRUNCATE_LOG_COUNT 2
+#define XFS_INACTIVE_LOG_COUNT 2
+#define XFS_CREATE_LOG_COUNT 2
+#define XFS_MKDIR_LOG_COUNT 3
+#define XFS_SYMLINK_LOG_COUNT 3
+#define XFS_REMOVE_LOG_COUNT 2
+#define XFS_LINK_LOG_COUNT 2
+#define XFS_RENAME_LOG_COUNT 2
+#define XFS_WRITE_LOG_COUNT 2
+#define XFS_ADDAFORK_LOG_COUNT 2
+#define XFS_ATTRINVAL_LOG_COUNT 1
+#define XFS_ATTRSET_LOG_COUNT 3
+#define XFS_ATTRRM_LOG_COUNT 3
+
+/*
+ * Here we centralize the specification of XFS meta-data buffer
+ * reference count values. This determine how hard the buffer
+ * cache tries to hold onto the buffer.
+ */
+#define XFS_AGF_REF 4
+#define XFS_AGI_REF 4
+#define XFS_AGFL_REF 3
+#define XFS_INO_BTREE_REF 3
+#define XFS_ALLOC_BTREE_REF 2
+#define XFS_BMAP_BTREE_REF 2
+#define XFS_DIR_BTREE_REF 2
+#define XFS_ATTR_BTREE_REF 1
+#define XFS_INO_REF 1
+#define XFS_DQUOT_REF 1
+
+#ifdef __KERNEL__
+/*
+ * XFS transaction mechanism exported interfaces that are
+ * actually macros.
+ */
+#define xfs_trans_get_log_res(tp) ((tp)->t_log_res)
+#define xfs_trans_get_log_count(tp) ((tp)->t_log_count)
+#define xfs_trans_get_block_res(tp) ((tp)->t_blk_res)
+#define xfs_trans_set_sync(tp) ((tp)->t_flags |= XFS_TRANS_SYNC)
+
+#ifdef DEBUG
+#define xfs_trans_agblocks_delta(tp, d) ((tp)->t_ag_freeblks_delta += (long)d)
+#define xfs_trans_agflist_delta(tp, d) ((tp)->t_ag_flist_delta += (long)d)
+#define xfs_trans_agbtree_delta(tp, d) ((tp)->t_ag_btree_delta += (long)d)
+#else
+#define xfs_trans_agblocks_delta(tp, d)
+#define xfs_trans_agflist_delta(tp, d)
+#define xfs_trans_agbtree_delta(tp, d)
+#endif
+
+/*
+ * XFS transaction mechanism exported interfaces.
+ */
+void xfs_trans_init(struct xfs_mount *);
+xfs_trans_t *xfs_trans_alloc(struct xfs_mount *, uint);
+xfs_trans_t *_xfs_trans_alloc(struct xfs_mount *, uint);
+xfs_trans_t *xfs_trans_dup(xfs_trans_t *);
+int xfs_trans_reserve(xfs_trans_t *, uint, uint, uint,
+ uint, uint);
+void xfs_trans_callback(xfs_trans_t *,
+ void (*)(xfs_trans_t *, void *), void *);
+void xfs_trans_mod_sb(xfs_trans_t *, uint, long);
+struct xfs_buf *xfs_trans_get_buf(xfs_trans_t *, struct xfs_buftarg *, xfs_daddr_t,
+ int, uint);
+int xfs_trans_read_buf(struct xfs_mount *, xfs_trans_t *,
+ struct xfs_buftarg *, xfs_daddr_t, int, uint,
+ struct xfs_buf **);
+struct xfs_buf *xfs_trans_getsb(xfs_trans_t *, struct xfs_mount *, int);
+
+void xfs_trans_brelse(xfs_trans_t *, struct xfs_buf *);
+void xfs_trans_bjoin(xfs_trans_t *, struct xfs_buf *);
+void xfs_trans_bhold(xfs_trans_t *, struct xfs_buf *);
+void xfs_trans_binval(xfs_trans_t *, struct xfs_buf *);
+void xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *);
+void xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *);
+void xfs_trans_stale_inode_buf(xfs_trans_t *, struct xfs_buf *);
+void xfs_trans_dquot_buf(xfs_trans_t *, struct xfs_buf *, uint);
+void xfs_trans_inode_alloc_buf(xfs_trans_t *, struct xfs_buf *);
+int xfs_trans_iget(struct xfs_mount *, xfs_trans_t *,
+ xfs_ino_t , uint, uint, struct xfs_inode **);
+void xfs_trans_ijoin(xfs_trans_t *, struct xfs_inode *, uint);
+void xfs_trans_ihold(xfs_trans_t *, struct xfs_inode *);
+void xfs_trans_ihold_release(xfs_trans_t *, struct xfs_inode *);
+void xfs_trans_log_buf(xfs_trans_t *, struct xfs_buf *, uint, uint);
+void xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint);
+struct xfs_efi_log_item *xfs_trans_get_efi(xfs_trans_t *, uint);
+void xfs_efi_release(struct xfs_efi_log_item *, uint);
+void xfs_trans_log_efi_extent(xfs_trans_t *,
+ struct xfs_efi_log_item *,
+ xfs_fsblock_t,
+ xfs_extlen_t);
+struct xfs_efd_log_item *xfs_trans_get_efd(xfs_trans_t *,
+ struct xfs_efi_log_item *,
+ uint);
+void xfs_trans_log_efd_extent(xfs_trans_t *,
+ struct xfs_efd_log_item *,
+ xfs_fsblock_t,
+ xfs_extlen_t);
+int xfs_trans_commit(xfs_trans_t *, uint flags, xfs_lsn_t *);
+void xfs_trans_cancel(xfs_trans_t *, int);
+void xfs_trans_ail_init(struct xfs_mount *);
+xfs_lsn_t xfs_trans_push_ail(struct xfs_mount *, xfs_lsn_t);
+xfs_lsn_t xfs_trans_tail_ail(struct xfs_mount *);
+void xfs_trans_unlocked_item(struct xfs_mount *,
+ xfs_log_item_t *);
+xfs_log_busy_slot_t *xfs_trans_add_busy(xfs_trans_t *tp,
+ xfs_agnumber_t ag,
+ xfs_extlen_t idx);
+
+#endif /* __KERNEL__ */
+
+#endif /* __XFS_TRANS_H__ */