xfs: split out transaction reservation code

The transaction reservation size calculations is used by both kernel
and userspace, but most of the transaction code in xfs_trans.c is
kernel specific. Split all the transaction reservation code out into
it's own files to make sharing with userspace simpler. This just
leaves kernel-only definitions in xfs_trans.h, so it doesn't need to
be shared with userspace anymore, either.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>

1 files changed, 137 insertions, 0 deletions

diff --git a/fs/xfs/xfs_trans_resv.h b/fs/xfs/xfs_trans_resv.h
new file mode 100644
index 000000000000..cc8260e6acb2
--- /dev/null
+++ b/fs/xfs/xfs_trans_resv.h
@@ -0,0 +1,137 @@
+/*
+ * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
+ * All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms 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.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write the Free Software Foundation,
+ * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+#ifndef	__XFS_TRANS_RESV_H__
+#define	__XFS_TRANS_RESV_H__
+
+struct xfs_mount;
+
+/*
+ * structure for maintaining pre-calculated transaction reservations.
+ */
+struct xfs_trans_resv {
+	uint	tr_write;	/* extent alloc trans */
+	uint	tr_itruncate;	/* truncate trans */
+	uint	tr_rename;	/* rename trans */
+	uint	tr_link;	/* link trans */
+	uint	tr_remove;	/* unlink trans */
+	uint	tr_symlink;	/* symlink trans */
+	uint	tr_create;	/* create trans */
+	uint	tr_mkdir;	/* mkdir trans */
+	uint	tr_ifree;	/* inode free trans */
+	uint	tr_ichange;	/* inode update trans */
+	uint	tr_growdata;	/* fs data section grow trans */
+	uint	tr_swrite;	/* sync write inode trans */
+	uint	tr_addafork;	/* cvt inode to attributed trans */
+	uint	tr_writeid;	/* write setuid/setgid file */
+	uint	tr_attrinval;	/* attr fork buffer invalidation */
+	uint	tr_attrsetm;	/* set/create an attribute at mount time */
+	uint	tr_attrsetrt;	/* set/create an attribute at runtime */
+	uint	tr_attrrm;	/* remove an attribute */
+	uint	tr_clearagi;	/* clear bad agi unlinked ino bucket */
+	uint	tr_growrtalloc;	/* grow realtime allocations */
+	uint	tr_growrtzero;	/* grow realtime zeroing */
+	uint	tr_growrtfree;	/* grow realtime freeing */
+	uint	tr_qm_sbchange;	/* change quota flags */
+	uint	tr_qm_setqlim;	/* adjust quota limits */
+	uint	tr_qm_dqalloc;	/* allocate quota on disk */
+	uint	tr_qm_quotaoff;	/* turn quota off */
+	uint	tr_qm_equotaoff;/* end of turn quota off */
+	uint	tr_sb;		/* modify superblock */
+};
+
+/*
+ * 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)
+
+
+#define	XFS_WRITE_LOG_RES(mp)	((mp)->m_reservations.tr_write)
+#define	XFS_ITRUNCATE_LOG_RES(mp)   ((mp)->m_reservations.tr_itruncate)
+#define	XFS_RENAME_LOG_RES(mp)	((mp)->m_reservations.tr_rename)
+#define	XFS_LINK_LOG_RES(mp)	((mp)->m_reservations.tr_link)
+#define	XFS_REMOVE_LOG_RES(mp)	((mp)->m_reservations.tr_remove)
+#define	XFS_SYMLINK_LOG_RES(mp)	((mp)->m_reservations.tr_symlink)
+#define	XFS_CREATE_LOG_RES(mp)	((mp)->m_reservations.tr_create)
+#define	XFS_MKDIR_LOG_RES(mp)	((mp)->m_reservations.tr_mkdir)
+#define	XFS_IFREE_LOG_RES(mp)	((mp)->m_reservations.tr_ifree)
+#define	XFS_ICHANGE_LOG_RES(mp)	((mp)->m_reservations.tr_ichange)
+#define	XFS_GROWDATA_LOG_RES(mp)    ((mp)->m_reservations.tr_growdata)
+#define	XFS_GROWRTALLOC_LOG_RES(mp)	((mp)->m_reservations.tr_growrtalloc)
+#define	XFS_GROWRTZERO_LOG_RES(mp)	((mp)->m_reservations.tr_growrtzero)
+#define	XFS_GROWRTFREE_LOG_RES(mp)	((mp)->m_reservations.tr_growrtfree)
+#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)
+#define	XFS_WRITEID_LOG_RES(mp)		((mp)->m_reservations.tr_swrite)
+#define	XFS_ADDAFORK_LOG_RES(mp)	((mp)->m_reservations.tr_addafork)
+#define	XFS_ATTRINVAL_LOG_RES(mp)	((mp)->m_reservations.tr_attrinval)
+#define	XFS_ATTRSETM_LOG_RES(mp)	((mp)->m_reservations.tr_attrsetm)
+#define	XFS_ATTRSETRT_LOG_RES(mp)	((mp)->m_reservations.tr_attrsetrt)
+#define	XFS_ATTRRM_LOG_RES(mp)		((mp)->m_reservations.tr_attrrm)
+#define	XFS_CLEAR_AGI_BUCKET_LOG_RES(mp)  ((mp)->m_reservations.tr_clearagi)
+#define XFS_QM_SBCHANGE_LOG_RES(mp)	((mp)->m_reservations.tr_qm_sbchange)
+#define XFS_QM_SETQLIM_LOG_RES(mp)	((mp)->m_reservations.tr_qm_setqlim)
+#define XFS_QM_DQALLOC_LOG_RES(mp)	((mp)->m_reservations.tr_qm_dqalloc)
+#define XFS_QM_QUOTAOFF_LOG_RES(mp)	((mp)->m_reservations.tr_qm_quotaoff)
+#define XFS_QM_QUOTAOFF_END_LOG_RES(mp)	((mp)->m_reservations.tr_qm_equotaoff)
+#define XFS_SB_LOG_RES(mp)		((mp)->m_reservations.tr_sb)
+
+/*
+ * 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
+
+void xfs_trans_resv_calc(struct xfs_mount *mp, struct xfs_trans_resv *resp);
+
+#endif	/* __XFS_TRANS_RESV_H__ */