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xfs: create a function to query all records in a btree

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Create a helper function that will query all records in a btree.
This will be used by the online repair functions to examine every
record in a btree to rebuild a second btree.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
This commit is contained in:
Darrick J. Wong 2017-03-28 14:56:35 -07:00
parent 2d520bfaa2
commit e9a2599a24
6 changed files with 57 additions and 7 deletions
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15
fs/xfs/libxfs/xfs_alloc.c
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@ -2910,3 +2910,18 @@ xfs_alloc_query_range(
return xfs_btree_query_range(cur, &low_brec, &high_brec,
xfs_alloc_query_range_helper, &query);
}
/* Find all free space records. */
int
xfs_alloc_query_all(
struct xfs_btree_cur *cur,
xfs_alloc_query_range_fn fn,
void *priv)
{
struct xfs_alloc_query_range_info query;
ASSERT(cur->bc_btnum == XFS_BTNUM_BNO);
query.priv = priv;
query.fn = fn;
return xfs_btree_query_all(cur, xfs_alloc_query_range_helper, &query);
}

2
fs/xfs/libxfs/xfs_alloc.h
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@ -228,5 +228,7 @@ int xfs_alloc_query_range(struct xfs_btree_cur *cur,
struct xfs_alloc_rec_incore *low_rec,
struct xfs_alloc_rec_incore *high_rec,
xfs_alloc_query_range_fn fn, void *priv);
int xfs_alloc_query_all(struct xfs_btree_cur *cur, xfs_alloc_query_range_fn fn,
void *priv);
#endif /* __XFS_ALLOC_H__ */

15
fs/xfs/libxfs/xfs_btree.c
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@ -4842,6 +4842,21 @@ xfs_btree_query_range(
fn, priv);
}
/* Query a btree for all records. */
int
xfs_btree_query_all(
struct xfs_btree_cur *cur,
xfs_btree_query_range_fn fn,
void *priv)
{
union xfs_btree_irec low_rec;
union xfs_btree_irec high_rec;
memset(&low_rec, 0, sizeof(low_rec));
memset(&high_rec, 0xFF, sizeof(high_rec));
return xfs_btree_query_range(cur, &low_rec, &high_rec, fn, priv);
}
/*
* Calculate the number of blocks needed to store a given number of records
* in a short-format (per-AG metadata) btree.

2
fs/xfs/libxfs/xfs_btree.h
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@ -496,6 +496,8 @@ typedef int (*xfs_btree_query_range_fn)(struct xfs_btree_cur *cur,
int xfs_btree_query_range(struct xfs_btree_cur *cur,
union xfs_btree_irec *low_rec, union xfs_btree_irec *high_rec,
xfs_btree_query_range_fn fn, void *priv);
int xfs_btree_query_all(struct xfs_btree_cur *cur, xfs_btree_query_range_fn fn,
void *priv);
typedef int (*xfs_btree_visit_blocks_fn)(struct xfs_btree_cur *cur, int level,
void *data);

28
fs/xfs/libxfs/xfs_rmap.c
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@ -2001,14 +2001,14 @@ xfs_rmap_query_range_helper(
/* Find all rmaps between two keys. */
int
xfs_rmap_query_range(
struct xfs_btree_cur *cur,
struct xfs_rmap_irec *low_rec,
struct xfs_rmap_irec *high_rec,
xfs_rmap_query_range_fn fn,
void *priv)
struct xfs_btree_cur *cur,
struct xfs_rmap_irec *low_rec,
struct xfs_rmap_irec *high_rec,
xfs_rmap_query_range_fn fn,
void *priv)
{
union xfs_btree_irec low_brec;
union xfs_btree_irec high_brec;
union xfs_btree_irec low_brec;
union xfs_btree_irec high_brec;
struct xfs_rmap_query_range_info query;
low_brec.r = *low_rec;
@ -2019,6 +2019,20 @@ xfs_rmap_query_range(
xfs_rmap_query_range_helper, &query);
}
/* Find all rmaps. */
int
xfs_rmap_query_all(
struct xfs_btree_cur *cur,
xfs_rmap_query_range_fn fn,
void *priv)
{
struct xfs_rmap_query_range_info query;
query.priv = priv;
query.fn = fn;
return xfs_btree_query_all(cur, xfs_rmap_query_range_helper, &query);
}
/* Clean up after calling xfs_rmap_finish_one. */
void
xfs_rmap_finish_one_cleanup(

2
fs/xfs/libxfs/xfs_rmap.h
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@ -162,6 +162,8 @@ typedef int (*xfs_rmap_query_range_fn)(
int xfs_rmap_query_range(struct xfs_btree_cur *cur,
struct xfs_rmap_irec *low_rec, struct xfs_rmap_irec *high_rec,
xfs_rmap_query_range_fn fn, void *priv);
int xfs_rmap_query_all(struct xfs_btree_cur *cur, xfs_rmap_query_range_fn fn,
void *priv);
enum xfs_rmap_intent_type {
XFS_RMAP_MAP,