[PATCH 5/6] xfs: move btree bulkload record initialization to ->get_record implementations

Darrick J. Wong
2023-07-27T22:25:07Z

When we're performing a bulk load of a btree, move the code that
actually stores the btree record in the new btree block out of the
generic code and into the individual ->get_record implementations.
This is preparation for being able to store multiple records with a
single indirect call.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
---
fs/xfs/libxfs/xfs_btree_staging.c | 17 +++++++----------
fs/xfs/libxfs/xfs_btree_staging.h | 15 ++++++++++-----
2 files changed, 17 insertions(+), 15 deletions(-)

diff --git a/fs/xfs/libxfs/xfs_btree_staging.c b/fs/xfs/libxfs/xfs_btree_staging.c
index 29e3f8ccb1852..369965cacc8c5 100644
--- a/fs/xfs/libxfs/xfs_btree_staging.c
+++ b/fs/xfs/libxfs/xfs_btree_staging.c
@@ -434,22 +434,19 @@ STATIC int
xfs_btree_bload_leaf(
struct xfs_btree_cur *cur,
unsigned int recs_this_block,
- xfs_btree_bload_get_record_fn get_record,
+ xfs_btree_bload_get_records_fn get_records,
struct xfs_btree_block *block,
void *priv)
{
- unsigned int j;
+ unsigned int j = 1;
int ret;

/* Fill the leaf block with records. */
- for (j = 1; j <= recs_this_block; j++) {
- union xfs_btree_rec *block_rec;
-
- ret = get_record(cur, priv);
- if (ret)
+ while (j <= recs_this_block) {
+ ret = get_records(cur, j, block, recs_this_block - j + 1, priv);
+ if (ret < 0)
return ret;
- block_rec = xfs_btree_rec_addr(cur, j, block);
- cur->bc_ops->init_rec_from_cur(cur, block_rec);
+ j += ret;
}

return 0;
@@ -787,7 +784,7 @@ xfs_btree_bload(
trace_xfs_btree_bload_block(cur, level, i, blocks, &ptr,
nr_this_block);

- ret = xfs_btree_bload_leaf(cur, nr_this_block, bbl->get_record,
+ ret = xfs_btree_bload_leaf(cur, nr_this_block, bbl->get_records,
block, priv);
if (ret)
goto out;
diff --git a/fs/xfs/libxfs/xfs_btree_staging.h b/fs/xfs/libxfs/xfs_btree_staging.h
index d6dea3f0088c6..82a3a8ef0f125 100644
--- a/fs/xfs/libxfs/xfs_btree_staging.h
+++ b/fs/xfs/libxfs/xfs_btree_staging.h
@@ -50,7 +50,9 @@ void xfs_btree_commit_ifakeroot(struct xfs_btree_cur *cur, struct xfs_trans *tp,
int whichfork, const struct xfs_btree_ops *ops);

/* Bulk loading of staged btrees. */
-typedef int (*xfs_btree_bload_get_record_fn)(struct xfs_btree_cur *cur, void *priv);
+typedef int (*xfs_btree_bload_get_records_fn)(struct xfs_btree_cur *cur,
+ unsigned int idx, struct xfs_btree_block *block,
+ unsigned int nr_wanted, void *priv);
typedef int (*xfs_btree_bload_claim_block_fn)(struct xfs_btree_cur *cur,
union xfs_btree_ptr *ptr, void *priv);
typedef size_t (*xfs_btree_bload_iroot_size_fn)(struct xfs_btree_cur *cur,
@@ -58,11 +60,14 @@ typedef size_t (*xfs_btree_bload_iroot_size_fn)(struct xfs_btree_cur *cur,

struct xfs_btree_bload {
/*
- * This function will be called nr_records times to load records into
- * the btree. The function does this by setting the cursor's bc_rec
- * field in in-core format. Records must be returned in sort order.
+ * This function will be called to load @nr_wanted records into the
+ * btree. The implementation does this by setting the cursor's bc_rec
+ * field in in-core format and using init_rec_from_cur to set the
+ * records in the btree block. Records must be returned in sort order.
+ * The function must return the number of records loaded or the usual
+ * negative errno.
*/
- xfs_btree_bload_get_record_fn get_record;
+ xfs_btree_bload_get_records_fn get_records;

/*
* This function will be called nr_blocks times to obtain a pointer