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| author | Darrick J. Wong <darrick.wong@oracle.com> | 2017-03-29 00:56:35 +0300 |
|---|---|---|
| committer | Darrick J. Wong <darrick.wong@oracle.com> | 2017-04-04 01:18:17 +0300 |
| commit | 2d520bfaa28b60401fbfe581f485a0bb952d881c (patch) | |
| tree | a343fc588824a4c60dc5eb1f0f5a9164c3fc92d2 /fs | |
| parent | 08438b1e386b7899e8a2ffef59d6ebf29aac530f (diff) | |
| download | linux-2d520bfaa28b60401fbfe581f485a0bb952d881c.tar.xz | |
xfs: provide a query_range function for freespace btrees
Implement a query_range function for the bnobt and cntbt. This will
be used for getfsmap fallback if there is no rmapbt and by the online
scrub and repair code.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/xfs/libxfs/xfs_alloc.c | 42 | ||||
| -rw-r--r-- | fs/xfs/libxfs/xfs_alloc.h | 10 |
2 files changed, 52 insertions, 0 deletions
diff --git a/fs/xfs/libxfs/xfs_alloc.c b/fs/xfs/libxfs/xfs_alloc.c index 369adcc18c02..f65b8d49ec16 100644 --- a/fs/xfs/libxfs/xfs_alloc.c +++ b/fs/xfs/libxfs/xfs_alloc.c @@ -2868,3 +2868,45 @@ err: xfs_trans_brelse(tp, agbp); return error; } + +struct xfs_alloc_query_range_info { + xfs_alloc_query_range_fn fn; + void *priv; +}; + +/* Format btree record and pass to our callback. */ +STATIC int +xfs_alloc_query_range_helper( + struct xfs_btree_cur *cur, + union xfs_btree_rec *rec, + void *priv) +{ + struct xfs_alloc_query_range_info *query = priv; + struct xfs_alloc_rec_incore irec; + + irec.ar_startblock = be32_to_cpu(rec->alloc.ar_startblock); + irec.ar_blockcount = be32_to_cpu(rec->alloc.ar_blockcount); + return query->fn(cur, &irec, query->priv); +} + +/* Find all free space within a given range of blocks. */ +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) +{ + union xfs_btree_irec low_brec; + union xfs_btree_irec high_brec; + struct xfs_alloc_query_range_info query; + + ASSERT(cur->bc_btnum == XFS_BTNUM_BNO); + low_brec.a = *low_rec; + high_brec.a = *high_rec; + query.priv = priv; + query.fn = fn; + return xfs_btree_query_range(cur, &low_brec, &high_brec, + xfs_alloc_query_range_helper, &query); +} diff --git a/fs/xfs/libxfs/xfs_alloc.h b/fs/xfs/libxfs/xfs_alloc.h index 2a8d0fa6fbbe..6c2643c4abd3 100644 --- a/fs/xfs/libxfs/xfs_alloc.h +++ b/fs/xfs/libxfs/xfs_alloc.h @@ -219,4 +219,14 @@ int xfs_free_extent_fix_freelist(struct xfs_trans *tp, xfs_agnumber_t agno, xfs_extlen_t xfs_prealloc_blocks(struct xfs_mount *mp); +typedef int (*xfs_alloc_query_range_fn)( + struct xfs_btree_cur *cur, + struct xfs_alloc_rec_incore *rec, + void *priv); + +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); + #endif /* __XFS_ALLOC_H__ */ |