Start constructing the refcount btree implementation by establishing
the on-disk format and everything needed to read, write, and
manipulate the refcount btree blocks.
v2: Calculate a separate maxlevels for the refcount btree.
v3: Enable the tracking of per-cursor stats for refcount btrees.
The refcount update code will use this to guess if it's time to
split a refcountbt update across two transactions to avoid
exhausing the transaction reservation.
xfs_refcountbt_init_cursor can be called under the ilock, so
use KM_NOFS to prevent fs activity with a lock held. This
should shut up some of the lockdep warnings.
Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
[hch: allocate the cursor with KM_NOFS to quiet lockdep]
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
include/darwin.h | 1
include/freebsd.h | 1
include/gnukfreebsd.h | 1
include/irix.h | 1
include/libxfs.h | 1
include/linux.h | 1
include/xfs_mount.h | 3 +
libxfs/Makefile | 2
libxfs/init.c | 2
libxfs/xfs_btree.c | 3 +
libxfs/xfs_btree.h | 12 +++
libxfs/xfs_format.h | 32 ++++++++
libxfs/xfs_refcount_btree.c | 177 +++++++++++++++++++++++++++++++++++++++++++
libxfs/xfs_refcount_btree.h | 67 ++++++++++++++++
libxfs/xfs_sb.c | 9 ++
libxfs/xfs_shared.h | 2
libxfs/xfs_trans_resv.c | 2
libxfs/xfs_trans_resv.h | 1
18 files changed, 317 insertions(+), 1 deletion(-)
create mode 100644 libxfs/xfs_refcount_btree.c
create mode 100644 libxfs/xfs_refcount_btree.h
diff --git a/include/darwin.h b/include/darwin.h
index a52030d..2935b4c 100644
--- a/include/darwin.h
+++ b/include/darwin.h
@@ -140,6 +140,7 @@ typedef off_t xfs_off_t;
typedef u_int64_t xfs_ino_t;
typedef u_int32_t xfs_dev_t;
typedef int64_t xfs_daddr_t;
+typedef u_int32_t xfs_nlink_t;
#define stat64 stat
#define fstat64 fstat
diff --git a/include/freebsd.h b/include/freebsd.h
index f7e0c75..3feca07 100644
--- a/include/freebsd.h
+++ b/include/freebsd.h
@@ -53,6 +53,7 @@ typedef off_t off64_t;
typedef __uint64_t xfs_ino_t;
typedef __uint32_t xfs_dev_t;
typedef __int64_t xfs_daddr_t;
+typedef __uint32_t xfs_nlink_t;
typedef unsigned char __u8;
typedef signed char __s8;
diff --git a/include/gnukfreebsd.h b/include/gnukfreebsd.h
index 64167b2..a62789e 100644
--- a/include/gnukfreebsd.h
+++ b/include/gnukfreebsd.h
@@ -42,6 +42,7 @@ typedef off_t xfs_off_t;
typedef __uint64_t xfs_ino_t;
typedef __uint32_t xfs_dev_t;
typedef __int64_t xfs_daddr_t;
+typedef __uint32_t xfs_nlink_t;
typedef unsigned char __u8;
typedef signed char __s8;
diff --git a/include/irix.h b/include/irix.h
index c2191ee..45c8594 100644
--- a/include/irix.h
+++ b/include/irix.h
@@ -47,6 +47,7 @@ typedef off64_t xfs_off_t;
typedef __int64_t xfs_ino_t;
typedef __int32_t xfs_dev_t;
typedef __int64_t xfs_daddr_t;
+typedef __int32_t xfs_nlink_t;
typedef unsigned char __u8;
typedef signed char __s8;
diff --git a/include/libxfs.h b/include/libxfs.h
index 5e76263..bec4ee6 100644
--- a/include/libxfs.h
+++ b/include/libxfs.h
@@ -78,6 +78,7 @@ extern uint32_t crc32c_le(uint32_t crc, unsigned char const *p, size_t len);
#include "xfs_trace.h"
#include "xfs_trans.h"
#include "xfs_rmap_btree.h"
+#include "xfs_refcount_btree.h"
#ifndef ARRAY_SIZE
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
diff --git a/include/linux.h b/include/linux.h
index cc0f70c..cd4b3eb 100644
--- a/include/linux.h
+++ b/include/linux.h
@@ -146,6 +146,7 @@ typedef off64_t xfs_off_t;
typedef __uint64_t xfs_ino_t;
typedef __uint32_t xfs_dev_t;
typedef __int64_t xfs_daddr_t;
+typedef __uint32_t xfs_nlink_t;
/**
* Abstraction of mountpoints.
diff --git a/include/xfs_mount.h b/include/xfs_mount.h
index c5db4d8..d47efa0 100644
--- a/include/xfs_mount.h
+++ b/include/xfs_mount.h
@@ -66,10 +66,13 @@ typedef struct xfs_mount {
uint m_inobt_mnr[2]; /* XFS_INOBT_BLOCK_MINRECS */
uint m_rmap_mxr[2]; /* max rmap btree records */
uint m_rmap_mnr[2]; /* min rmap btree records */
+ uint m_refc_mxr[2]; /* max refc btree records */
+ uint m_refc_mnr[2]; /* min refc btree records */
uint m_ag_maxlevels; /* XFS_AG_MAXLEVELS */
uint m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */
uint m_in_maxlevels; /* XFS_IN_MAXLEVELS */
uint m_rmap_maxlevels; /* max rmap btree levels */
+ uint m_refc_maxlevels; /* max refcount btree level */
xfs_extlen_t m_ag_prealloc_blocks; /* reserved ag blocks */
uint m_alloc_set_aside; /* space we can't use */
uint m_ag_max_usable; /* max space per AG */
diff --git a/libxfs/Makefile b/libxfs/Makefile
index 588c663..c31a2e9 100644
--- a/libxfs/Makefile
+++ b/libxfs/Makefile
@@ -37,6 +37,7 @@ HFILES = \
xfs_inode_buf.h \
xfs_inode_fork.h \
xfs_quota_defs.h \
+ xfs_refcount_btree.h \
xfs_rmap_btree.h \
xfs_sb.h \
xfs_shared.h \
@@ -85,6 +86,7 @@ CFILES = cache.c \
xfs_inode_fork.c \
xfs_ialloc_btree.c \
xfs_log_rlimit.c \
+ xfs_refcount_btree.c \
xfs_rmap.c \
xfs_rmap_btree.c \
xfs_rtbitmap.c \
diff --git a/libxfs/init.c b/libxfs/init.c
index c56d123..66bfbd8 100644
--- a/libxfs/init.c
+++ b/libxfs/init.c
@@ -32,6 +32,7 @@
#include "xfs_inode.h"
#include "xfs_trans.h"
#include "xfs_rmap_btree.h"
+#include "xfs_refcount_btree.h"
#include "libxfs.h" /* for now */
@@ -685,6 +686,7 @@ libxfs_mount(
xfs_bmap_compute_maxlevels(mp, XFS_ATTR_FORK);
xfs_ialloc_compute_maxlevels(mp);
xfs_rmapbt_compute_maxlevels(mp);
+ xfs_refcountbt_compute_maxlevels(mp);
if (sbp->sb_imax_pct) {
/* Make sure the maximum inode count is a multiple of the
diff --git a/libxfs/xfs_btree.c b/libxfs/xfs_btree.c
index f4b1780..89fb2fe 100644
--- a/libxfs/xfs_btree.c
+++ b/libxfs/xfs_btree.c
@@ -1210,6 +1210,9 @@ xfs_btree_set_refs(
case XFS_BTNUM_RMAP:
xfs_buf_set_ref(bp, XFS_RMAP_BTREE_REF);
break;
+ case XFS_BTNUM_REFC:
+ xfs_buf_set_ref(bp, XFS_REFC_BTREE_REF);
+ break;
default:
ASSERT(0);
}
diff --git a/libxfs/xfs_btree.h b/libxfs/xfs_btree.h
index 93e761e..dbf299f 100644
--- a/libxfs/xfs_btree.h
+++ b/libxfs/xfs_btree.h
@@ -43,6 +43,7 @@ union xfs_btree_key {
xfs_alloc_key_t alloc;
struct xfs_inobt_key inobt;
struct xfs_rmap_key rmap;
+ struct xfs_refcount_key refc;
};
union xfs_btree_rec {
@@ -51,6 +52,7 @@ union xfs_btree_rec {
struct xfs_alloc_rec alloc;
struct xfs_inobt_rec inobt;
struct xfs_rmap_rec rmap;
+ struct xfs_refcount_rec refc;
};
/*
@@ -221,6 +223,15 @@ union xfs_btree_irec {
xfs_bmbt_irec_t b;
xfs_inobt_rec_incore_t i;
struct xfs_rmap_irec r;
+ struct xfs_refcount_irec rc;
+};
+
+/* Per-AG btree private information. */
+union xfs_btree_cur_private {
+ struct {
+ unsigned long nr_ops; /* # record updates */
+ int shape_changes; /* # of extent splits */
+ } refc;
};
/*
@@ -247,6 +258,7 @@ typedef struct xfs_btree_cur
struct xfs_buf *agbp; /* agf/agi buffer pointer */
struct xfs_defer_ops *dfops; /* deferred updates */
xfs_agnumber_t agno; /* ag number */
+ union xfs_btree_cur_private priv;
} a;
struct { /* needed for BMAP */
struct xfs_inode *ip; /* pointer to our inode */
diff --git a/libxfs/xfs_format.h b/libxfs/xfs_format.h
index 54fbe2b..916d92b 100644
--- a/libxfs/xfs_format.h
+++ b/libxfs/xfs_format.h
@@ -1553,6 +1553,38 @@ xfs_owner_info_pack(
unsigned int xfs_refc_block(struct xfs_mount *mp);
+/*
+ * Data record/key structure
+ *
+ * Each record associates a range of physical blocks (starting at
+ * rc_startblock and ending rc_blockcount blocks later) with a
+ * reference count (rc_refcount). A record is only stored in the
+ * btree if the refcount is > 2. An entry in the free block btree
+ * means that the refcount is 0, and no entries anywhere means that
+ * the refcount is 1, as was true in XFS before reflinking.
+ */
+struct xfs_refcount_rec {
+ __be32 rc_startblock; /* starting block number */
+ __be32 rc_blockcount; /* count of blocks */
+ __be32 rc_refcount; /* number of inodes linked here */
+};
+
+struct xfs_refcount_key {
+ __be32 rc_startblock; /* starting block number */
+};
+
+struct xfs_refcount_irec {
+ xfs_agblock_t rc_startblock; /* starting block number */
+ xfs_extlen_t rc_blockcount; /* count of free blocks */
+ xfs_nlink_t rc_refcount; /* number of inodes linked here */
+};
+
+#define MAXREFCOUNT ((xfs_nlink_t)~0U)
+#define MAXREFCEXTLEN ((xfs_extlen_t)~0U)
+
+/* btree pointer type */
+typedef __be32 xfs_refcount_ptr_t;
+
/*
* BMAP Btree format definitions
diff --git a/libxfs/xfs_refcount_btree.c b/libxfs/xfs_refcount_btree.c
new file mode 100644
index 0000000..a7b99e4
--- /dev/null
+++ b/libxfs/xfs_refcount_btree.c
@@ -0,0 +1,177 @@
+/*
+ * Copyright (C) 2016 Oracle. All Rights Reserved.
+ *
+ * Author: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
+ *
+ * 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; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * 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.
+ */
+#include "libxfs_priv.h"
+#include "xfs_fs.h"
+#include "xfs_shared.h"
+#include "xfs_format.h"
+#include "xfs_log_format.h"
+#include "xfs_trans_resv.h"
+#include "xfs_sb.h"
+#include "xfs_mount.h"
+#include "xfs_btree.h"
+#include "xfs_bmap.h"
+#include "xfs_refcount_btree.h"
+#include "xfs_alloc.h"
+#include "xfs_trace.h"
+#include "xfs_cksum.h"
+#include "xfs_trans.h"
+#include "xfs_bit.h"
+
+static struct xfs_btree_cur *
+xfs_refcountbt_dup_cursor(
+ struct xfs_btree_cur *cur)
+{
+ return xfs_refcountbt_init_cursor(cur->bc_mp, cur->bc_tp,
+ cur->bc_private.a.agbp, cur->bc_private.a.agno,
+ cur->bc_private.a.dfops);
+}
+
+STATIC bool
+xfs_refcountbt_verify(
+ struct xfs_buf *bp)
+{
+ struct xfs_mount *mp = bp->b_target->bt_mount;
+ struct xfs_btree_block *block = XFS_BUF_TO_BLOCK(bp);
+ struct xfs_perag *pag = bp->b_pag;
+ unsigned int level;
+
+ if (block->bb_magic != cpu_to_be32(XFS_REFC_CRC_MAGIC))
+ return false;
+
+ if (!xfs_sb_version_hasreflink(&mp->m_sb))
+ return false;
+ if (!xfs_btree_sblock_v5hdr_verify(bp))
+ return false;
+
+ level = be16_to_cpu(block->bb_level);
+ if (pag && pag->pagf_init) {
+ if (level >= pag->pagf_refcount_level)
+ return false;
+ } else if (level >= mp->m_refc_maxlevels)
+ return false;
+
+ return xfs_btree_sblock_verify(bp, mp->m_refc_mxr[level != 0]);
+}
+
+STATIC void
+xfs_refcountbt_read_verify(
+ struct xfs_buf *bp)
+{
+ if (!xfs_btree_sblock_verify_crc(bp))
+ xfs_buf_ioerror(bp, -EFSBADCRC);
+ else if (!xfs_refcountbt_verify(bp))
+ xfs_buf_ioerror(bp, -EFSCORRUPTED);
+
+ if (bp->b_error) {
+ trace_xfs_btree_corrupt(bp, _RET_IP_);
+ xfs_verifier_error(bp);
+ }
+}
+
+STATIC void
+xfs_refcountbt_write_verify(
+ struct xfs_buf *bp)
+{
+ if (!xfs_refcountbt_verify(bp)) {
+ trace_xfs_btree_corrupt(bp, _RET_IP_);
+ xfs_buf_ioerror(bp, -EFSCORRUPTED);
+ xfs_verifier_error(bp);
+ return;
+ }
+ xfs_btree_sblock_calc_crc(bp);
+
+}
+
+const struct xfs_buf_ops xfs_refcountbt_buf_ops = {
+ .name = "xfs_refcountbt",
+ .verify_read = xfs_refcountbt_read_verify,
+ .verify_write = xfs_refcountbt_write_verify,
+};
+
+static const struct xfs_btree_ops xfs_refcountbt_ops = {
+ .rec_len = sizeof(struct xfs_refcount_rec),
+ .key_len = sizeof(struct xfs_refcount_key),
+
+ .dup_cursor = xfs_refcountbt_dup_cursor,
+ .buf_ops = &xfs_refcountbt_buf_ops,
+};
+
+/*
+ * Allocate a new refcount btree cursor.
+ */
+struct xfs_btree_cur *
+xfs_refcountbt_init_cursor(
+ struct xfs_mount *mp,
+ struct xfs_trans *tp,
+ struct xfs_buf *agbp,
+ xfs_agnumber_t agno,
+ struct xfs_defer_ops *dfops)
+{
+ struct xfs_agf *agf = XFS_BUF_TO_AGF(agbp);
+ struct xfs_btree_cur *cur;
+
+ ASSERT(agno != NULLAGNUMBER);
+ ASSERT(agno < mp->m_sb.sb_agcount);
+ cur = kmem_zone_zalloc(xfs_btree_cur_zone, KM_NOFS);
+
+ cur->bc_tp = tp;
+ cur->bc_mp = mp;
+ cur->bc_btnum = XFS_BTNUM_REFC;
+ cur->bc_blocklog = mp->m_sb.sb_blocklog;
+ cur->bc_ops = &xfs_refcountbt_ops;
+
+ cur->bc_nlevels = be32_to_cpu(agf->agf_refcount_level);
+
+ cur->bc_private.a.agbp = agbp;
+ cur->bc_private.a.agno = agno;
+ cur->bc_private.a.dfops = dfops;
+ cur->bc_flags |= XFS_BTREE_CRC_BLOCKS;
+
+ cur->bc_private.a.priv.refc.nr_ops = 0;
+ cur->bc_private.a.priv.refc.shape_changes = 0;
+
+ return cur;
+}
+
+/*
+ * Calculate the number of records in a refcount btree block.
+ */
+int
+xfs_refcountbt_maxrecs(
+ struct xfs_mount *mp,
+ int blocklen,
+ bool leaf)
+{
+ blocklen -= XFS_REFCOUNT_BLOCK_LEN;
+
+ if (leaf)
+ return blocklen / sizeof(struct xfs_refcount_rec);
+ return blocklen / (sizeof(struct xfs_refcount_key) +
+ sizeof(xfs_refcount_ptr_t));
+}
+
+/* Compute the maximum height of a refcount btree. */
+void
+xfs_refcountbt_compute_maxlevels(
+ struct xfs_mount *mp)
+{
+ mp->m_refc_maxlevels = xfs_btree_compute_maxlevels(mp,
+ mp->m_refc_mnr, mp->m_sb.sb_agblocks);
+}
diff --git a/libxfs/xfs_refcount_btree.h b/libxfs/xfs_refcount_btree.h
new file mode 100644
index 0000000..9e9ad7c
--- /dev/null
+++ b/libxfs/xfs_refcount_btree.h
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2016 Oracle. All Rights Reserved.
+ *
+ * Author: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
+ *
+ * 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; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * 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_REFCOUNT_BTREE_H__
+#define __XFS_REFCOUNT_BTREE_H__
+
+/*
+ * Reference Count Btree on-disk structures
+ */
+
+struct xfs_buf;
+struct xfs_btree_cur;
+struct xfs_mount;
+
+/*
+ * Btree block header size
+ */
+#define XFS_REFCOUNT_BLOCK_LEN XFS_BTREE_SBLOCK_CRC_LEN
+
+/*
+ * Record, key, and pointer address macros for btree blocks.
+ *
+ * (note that some of these may appear unused, but they are used in userspace)
+ */
+#define XFS_REFCOUNT_REC_ADDR(block, index) \
+ ((struct xfs_refcount_rec *) \
+ ((char *)(block) + \
+ XFS_REFCOUNT_BLOCK_LEN + \
+ (((index) - 1) * sizeof(struct xfs_refcount_rec))))
+
+#define XFS_REFCOUNT_KEY_ADDR(block, index) \
+ ((struct xfs_refcount_key *) \
+ ((char *)(block) + \
+ XFS_REFCOUNT_BLOCK_LEN + \
+ ((index) - 1) * sizeof(struct xfs_refcount_key)))
+
+#define XFS_REFCOUNT_PTR_ADDR(block, index, maxrecs) \
+ ((xfs_refcount_ptr_t *) \
+ ((char *)(block) + \
+ XFS_REFCOUNT_BLOCK_LEN + \
+ (maxrecs) * sizeof(struct xfs_refcount_key) + \
+ ((index) - 1) * sizeof(xfs_refcount_ptr_t)))
+
+extern struct xfs_btree_cur *xfs_refcountbt_init_cursor(struct xfs_mount *mp,
+ struct xfs_trans *tp, struct xfs_buf *agbp, xfs_agnumber_t agno,
+ struct xfs_defer_ops *dfops);
+extern int xfs_refcountbt_maxrecs(struct xfs_mount *mp, int blocklen,
+ bool leaf);
+extern void xfs_refcountbt_compute_maxlevels(struct xfs_mount *mp);
+
+#endif /* __XFS_REFCOUNT_BTREE_H__ */
diff --git a/libxfs/xfs_sb.c b/libxfs/xfs_sb.c
index 26c29ea..bb54bc2 100644
--- a/libxfs/xfs_sb.c
+++ b/libxfs/xfs_sb.c
@@ -35,6 +35,8 @@
#include "xfs_alloc_btree.h"
#include "xfs_ialloc_btree.h"
#include "xfs_rmap_btree.h"
+#include "xfs_bmap.h"
+#include "xfs_refcount_btree.h"
/*
* Physical superblock buffer manipulations. Shared with libxfs in userspace.
@@ -737,6 +739,13 @@ xfs_sb_mount_common(
mp->m_rmap_mnr[0] = mp->m_rmap_mxr[0] / 2;
mp->m_rmap_mnr[1] = mp->m_rmap_mxr[1] / 2;
+ mp->m_refc_mxr[0] = xfs_refcountbt_maxrecs(mp, sbp->sb_blocksize,
+ true);
+ mp->m_refc_mxr[1] = xfs_refcountbt_maxrecs(mp, sbp->sb_blocksize,
+ false);
+ mp->m_refc_mnr[0] = mp->m_refc_mxr[0] / 2;
+ mp->m_refc_mnr[1] = mp->m_refc_mxr[1] / 2;
+
mp->m_bsize = XFS_FSB_TO_BB(mp, 1);
mp->m_ialloc_inos = (int)MAX((__uint16_t)XFS_INODES_PER_CHUNK,
sbp->sb_inopblock);
diff --git a/libxfs/xfs_shared.h b/libxfs/xfs_shared.h
index 0c5b30b..c6f4eb4 100644
--- a/libxfs/xfs_shared.h
+++ b/libxfs/xfs_shared.h
@@ -39,6 +39,7 @@ extern const struct xfs_buf_ops xfs_agf_buf_ops;
extern const struct xfs_buf_ops xfs_agfl_buf_ops;
extern const struct xfs_buf_ops xfs_allocbt_buf_ops;
extern const struct xfs_buf_ops xfs_rmapbt_buf_ops;
+extern const struct xfs_buf_ops xfs_refcountbt_buf_ops;
extern const struct xfs_buf_ops xfs_attr3_leaf_buf_ops;
extern const struct xfs_buf_ops xfs_attr3_rmt_buf_ops;
extern const struct xfs_buf_ops xfs_bmbt_buf_ops;
@@ -122,6 +123,7 @@ int xfs_log_calc_minimum_size(struct xfs_mount *);
#define XFS_INO_REF 2
#define XFS_ATTR_BTREE_REF 1
#define XFS_DQUOT_REF 1
+#define XFS_REFC_BTREE_REF 1
/*
* Flags for xfs_trans_ichgtime().
diff --git a/libxfs/xfs_trans_resv.c b/libxfs/xfs_trans_resv.c
index 2ed80a5..10234bb 100644
--- a/libxfs/xfs_trans_resv.c
+++ b/libxfs/xfs_trans_resv.c
@@ -72,7 +72,7 @@ xfs_calc_buf_res(
*
* Keep in mind that max depth is calculated separately for each type of tree.
*/
-static uint
+uint
xfs_allocfree_log_count(
struct xfs_mount *mp,
uint num_ops)
diff --git a/libxfs/xfs_trans_resv.h b/libxfs/xfs_trans_resv.h
index 0eb46ed..36a1511 100644
--- a/libxfs/xfs_trans_resv.h
+++ b/libxfs/xfs_trans_resv.h
@@ -102,5 +102,6 @@ struct xfs_trans_resv {
#define XFS_ATTRRM_LOG_COUNT 3
void xfs_trans_resv_calc(struct xfs_mount *mp, struct xfs_trans_resv *resp);
+uint xfs_allocfree_log_count(struct xfs_mount *mp, uint num_ops);
#endif /* __XFS_TRANS_RESV_H__ */
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