diff options
| author | Darrick J. Wong <darrick.wong@oracle.com> | 2016-08-03 03:42:39 +0200 |
|---|---|---|
| committer | Dave Chinner <david@fromorbit.com> | 2016-08-03 03:42:39 +0200 |
| commit | c543838a1e00a5f8791e59ae570b1030d70906f2 (patch) | |
| tree | e337821e836ea0378d256dd5e598b75f97df14db | |
| parent | xfs: support overlapping intervals in the rmap btree (diff) | |
| download | linux-c543838a1e00a5f8791e59ae570b1030d70906f2.tar.xz linux-c543838a1e00a5f8791e59ae570b1030d70906f2.zip | |
xfs: teach rmapbt to support interval queries
Now that the generic btree code supports querying all records within a
range of keys, use that functionality to allow us to ask for all the
extents mapped to a range of physical blocks.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
| -rw-r--r-- | fs/xfs/libxfs/xfs_rmap.c | 43 | ||||
| -rw-r--r-- | fs/xfs/libxfs/xfs_rmap.h | 9 |
2 files changed, 52 insertions, 0 deletions
diff --git a/fs/xfs/libxfs/xfs_rmap.c b/fs/xfs/libxfs/xfs_rmap.c index ce29d6b7cd58..6638bc725b23 100644 --- a/fs/xfs/libxfs/xfs_rmap.c +++ b/fs/xfs/libxfs/xfs_rmap.c @@ -183,3 +183,46 @@ out_error: trace_xfs_rmap_map_error(mp, agno, error, _RET_IP_); return error; } + +struct xfs_rmap_query_range_info { + xfs_rmap_query_range_fn fn; + void *priv; +}; + +/* Format btree record and pass to our callback. */ +STATIC int +xfs_rmap_query_range_helper( + struct xfs_btree_cur *cur, + union xfs_btree_rec *rec, + void *priv) +{ + struct xfs_rmap_query_range_info *query = priv; + struct xfs_rmap_irec irec; + int error; + + error = xfs_rmap_btrec_to_irec(rec, &irec); + if (error) + return error; + return query->fn(cur, &irec, query->priv); +} + +/* 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) +{ + union xfs_btree_irec low_brec; + union xfs_btree_irec high_brec; + struct xfs_rmap_query_range_info query; + + low_brec.r = *low_rec; + high_brec.r = *high_rec; + query.priv = priv; + query.fn = fn; + return xfs_btree_query_range(cur, &low_brec, &high_brec, + xfs_rmap_query_range_helper, &query); +} diff --git a/fs/xfs/libxfs/xfs_rmap.h b/fs/xfs/libxfs/xfs_rmap.h index aa39a2a825e7..34c811a2dacc 100644 --- a/fs/xfs/libxfs/xfs_rmap.h +++ b/fs/xfs/libxfs/xfs_rmap.h @@ -151,4 +151,13 @@ int xfs_rmap_lookup_eq(struct xfs_btree_cur *cur, xfs_agblock_t bno, int xfs_rmap_get_rec(struct xfs_btree_cur *cur, struct xfs_rmap_irec *irec, int *stat); +typedef int (*xfs_rmap_query_range_fn)( + struct xfs_btree_cur *cur, + struct xfs_rmap_irec *rec, + void *priv); + +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); + #endif /* __XFS_RMAP_H__ */ |