[XFS] add get_maxrecs btree operation
Factor xfs_btree_maxrecs into a per-btree operation.
The get_maxrecs method is based on a patch from Dave Chinner.
SGI-PV: 985583
SGI-Modid: xfs-linux-melb:xfs-kern:32188a
Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Signed-off-by: Bill O'Donnell <billodo@sgi.com>
Signed-off-by: David Chinner <david@fromorbit.com>
diff --git a/fs/xfs/xfs_alloc_btree.c b/fs/xfs/xfs_alloc_btree.c
index 9c91dfc..1f268b6 100644
--- a/fs/xfs/xfs_alloc_btree.c
+++ b/fs/xfs/xfs_alloc_btree.c
@@ -2219,6 +2219,14 @@
cur->bc_btnum);
}
+STATIC int
+xfs_allocbt_get_maxrecs(
+ struct xfs_btree_cur *cur,
+ int level)
+{
+ return cur->bc_mp->m_alloc_mxr[level != 0];
+}
+
#ifdef XFS_BTREE_TRACE
ktrace_t *xfs_allocbt_trace_buf;
@@ -2287,6 +2295,7 @@
static const struct xfs_btree_ops xfs_allocbt_ops = {
.dup_cursor = xfs_allocbt_dup_cursor,
+ .get_maxrecs = xfs_allocbt_get_maxrecs,
#ifdef XFS_BTREE_TRACE
.trace_enter = xfs_allocbt_trace_enter,
diff --git a/fs/xfs/xfs_bmap_btree.c b/fs/xfs/xfs_bmap_btree.c
index 16f2fde..bdcfbea 100644
--- a/fs/xfs/xfs_bmap_btree.c
+++ b/fs/xfs/xfs_bmap_btree.c
@@ -2415,6 +2415,14 @@
return new;
}
+STATIC int
+xfs_bmbt_get_maxrecs(
+ struct xfs_btree_cur *cur,
+ int level)
+{
+ return XFS_BMAP_BLOCK_IMAXRECS(level, cur);
+}
+
#ifdef XFS_BTREE_TRACE
ktrace_t *xfs_bmbt_trace_buf;
@@ -2502,6 +2510,7 @@
static const struct xfs_btree_ops xfs_bmbt_ops = {
.dup_cursor = xfs_bmbt_dup_cursor,
+ .get_maxrecs = xfs_bmbt_get_maxrecs,
#ifdef XFS_BTREE_TRACE
.trace_enter = xfs_bmbt_trace_enter,
diff --git a/fs/xfs/xfs_btree.c b/fs/xfs/xfs_btree.c
index 966d58d5..893e86f 100644
--- a/fs/xfs/xfs_btree.c
+++ b/fs/xfs/xfs_btree.c
@@ -51,31 +51,6 @@
};
/*
- * Checking routine: return maxrecs for the block.
- */
-STATIC int /* number of records fitting in block */
-xfs_btree_maxrecs(
- xfs_btree_cur_t *cur, /* btree cursor */
- xfs_btree_block_t *block) /* generic btree block pointer */
-{
- switch (cur->bc_btnum) {
- case XFS_BTNUM_BNO:
- case XFS_BTNUM_CNT:
- return (int)XFS_ALLOC_BLOCK_MAXRECS(
- be16_to_cpu(block->bb_level), cur);
- case XFS_BTNUM_BMAP:
- return (int)XFS_BMAP_BLOCK_IMAXRECS(
- be16_to_cpu(block->bb_level), cur);
- case XFS_BTNUM_INO:
- return (int)XFS_INOBT_BLOCK_MAXRECS(
- be16_to_cpu(block->bb_level), cur);
- default:
- ASSERT(0);
- return 0;
- }
-}
-
-/*
* External routines.
*/
@@ -207,7 +182,7 @@
be32_to_cpu(block->bb_magic) == xfs_magics[cur->bc_btnum] &&
be16_to_cpu(block->bb_level) == level &&
be16_to_cpu(block->bb_numrecs) <=
- xfs_btree_maxrecs(cur, (xfs_btree_block_t *)block) &&
+ cur->bc_ops->get_maxrecs(cur, level) &&
block->bb_leftsib &&
(be64_to_cpu(block->bb_leftsib) == NULLDFSBNO ||
XFS_FSB_SANITY_CHECK(mp, be64_to_cpu(block->bb_leftsib))) &&
@@ -245,7 +220,7 @@
be32_to_cpu(block->bb_magic) == xfs_magics[cur->bc_btnum] &&
be16_to_cpu(block->bb_level) == level &&
be16_to_cpu(block->bb_numrecs) <=
- xfs_btree_maxrecs(cur, (xfs_btree_block_t *)block) &&
+ cur->bc_ops->get_maxrecs(cur, level) &&
(be32_to_cpu(block->bb_leftsib) == NULLAGBLOCK ||
be32_to_cpu(block->bb_leftsib) < agflen) &&
block->bb_leftsib &&
diff --git a/fs/xfs/xfs_btree.h b/fs/xfs/xfs_btree.h
index 0647a0e..5398cd0 100644
--- a/fs/xfs/xfs_btree.h
+++ b/fs/xfs/xfs_btree.h
@@ -183,6 +183,9 @@
/* cursor operations */
struct xfs_btree_cur *(*dup_cursor)(struct xfs_btree_cur *);
+ /* records in block/level */
+ int (*get_maxrecs)(struct xfs_btree_cur *cur, int level);
+
/* btree tracing */
#ifdef XFS_BTREE_TRACE
void (*trace_enter)(struct xfs_btree_cur *, const char *,
diff --git a/fs/xfs/xfs_ialloc_btree.c b/fs/xfs/xfs_ialloc_btree.c
index fc99524..18867f1 100644
--- a/fs/xfs/xfs_ialloc_btree.c
+++ b/fs/xfs/xfs_ialloc_btree.c
@@ -2085,6 +2085,14 @@
cur->bc_private.a.agbp, cur->bc_private.a.agno);
}
+STATIC int
+xfs_inobt_get_maxrecs(
+ struct xfs_btree_cur *cur,
+ int level)
+{
+ return cur->bc_mp->m_inobt_mxr[level != 0];
+}
+
#ifdef XFS_BTREE_TRACE
ktrace_t *xfs_inobt_trace_buf;
@@ -2153,6 +2161,7 @@
static const struct xfs_btree_ops xfs_inobt_ops = {
.dup_cursor = xfs_inobt_dup_cursor,
+ .get_maxrecs = xfs_inobt_get_maxrecs,
#ifdef XFS_BTREE_TRACE
.trace_enter = xfs_inobt_trace_enter,