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xfs: create a ranged query function for refcount btrees

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Implement ranged queries for refcount records.  The next patch will use
this to scan refcount data.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Darrick J. Wong 2023-12-15 10:03:40 -08:00
parent 48a72f6086
commit d12bf8bac8
2 changed files with 51 additions and 0 deletions
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41
fs/xfs/libxfs/xfs_refcount.c
View File

@ -2031,6 +2031,47 @@ xfs_refcount_has_records(
return xfs_btree_has_records(cur, &low, &high, NULL, outcome);
}
struct xfs_refcount_query_range_info {
xfs_refcount_query_range_fn fn;
void *priv;
};
/* Format btree record and pass to our callback. */
STATIC int
xfs_refcount_query_range_helper(
struct xfs_btree_cur *cur,
const union xfs_btree_rec *rec,
void *priv)
{
struct xfs_refcount_query_range_info *query = priv;
struct xfs_refcount_irec irec;
xfs_failaddr_t fa;
xfs_refcount_btrec_to_irec(rec, &irec);
fa = xfs_refcount_check_irec(cur->bc_ag.pag, &irec);
if (fa)
return xfs_refcount_complain_bad_rec(cur, fa, &irec);
return query->fn(cur, &irec, query->priv);
}
/* Find all refcount records between two keys. */
int
xfs_refcount_query_range(
struct xfs_btree_cur *cur,
const struct xfs_refcount_irec *low_rec,
const struct xfs_refcount_irec *high_rec,
xfs_refcount_query_range_fn fn,
void *priv)
{
union xfs_btree_irec low_brec = { .rc = *low_rec };
union xfs_btree_irec high_brec = { .rc = *high_rec };
struct xfs_refcount_query_range_info query = { .priv = priv, .fn = fn };
return xfs_btree_query_range(cur, &low_brec, &high_brec,
xfs_refcount_query_range_helper, &query);
}
int __init
xfs_refcount_intent_init_cache(void)
{

10
fs/xfs/libxfs/xfs_refcount.h
View File

@ -127,4 +127,14 @@ extern struct kmem_cache *xfs_refcount_intent_cache;
int __init xfs_refcount_intent_init_cache(void);
void xfs_refcount_intent_destroy_cache(void);
typedef int (*xfs_refcount_query_range_fn)(
struct xfs_btree_cur *cur,
const struct xfs_refcount_irec *rec,
void *priv);
int xfs_refcount_query_range(struct xfs_btree_cur *cur,
const struct xfs_refcount_irec *low_rec,
const struct xfs_refcount_irec *high_rec,
xfs_refcount_query_range_fn fn, void *priv);
#endif /* __XFS_REFCOUNT_H__ */