Create xfs_spchunk_has_record() to receive the parameters of a new
sparse inode chunk allocation and identify whether a record exists that
is capable of tracking this sparse chunk.
Signed-off-by: Brian Foster <bfoster@xxxxxxxxxx>
---
fs/xfs/libxfs/xfs_ialloc.c | 55 ++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 55 insertions(+)
diff --git a/fs/xfs/libxfs/xfs_ialloc.c b/fs/xfs/libxfs/xfs_ialloc.c
index 27d3437..be57b51 100644
--- a/fs/xfs/libxfs/xfs_ialloc.c
+++ b/fs/xfs/libxfs/xfs_ialloc.c
@@ -351,6 +351,61 @@ xfs_ialloc_inode_init(
}
/*
+ * Determine whether part of a sparse inode chunk that has just been allocated
+ * is covered by an existing inobt record.
+ */
+STATIC int
+xfs_spchunk_has_record(
+ struct xfs_mount *mp,
+ struct xfs_trans *tp,
+ struct xfs_buf *agbp,
+ xfs_agino_t newino,
+ xfs_agino_t count,
+ xfs_btnum_t btnum,
+ struct xfs_inobt_rec_incore *orec)
+{
+ struct xfs_btree_cur *cur;
+ struct xfs_agi *agi = XFS_BUF_TO_AGI(agbp);
+ xfs_agnumber_t agno = be32_to_cpu(agi->agi_seqno);
+ xfs_agino_t previno;
+ int error;
+ int i;
+ struct xfs_inobt_rec_incore rec;
+
+ orec->ir_startino = NULLAGINO;
+
+ cur = xfs_inobt_init_cursor(mp, tp, agbp, agno, btnum);
+
+ previno = newino + count - XFS_INODES_PER_CHUNK;
+ error = xfs_inobt_lookup(cur, previno, XFS_LOOKUP_GE, &i);
+ if (error)
+ goto error;
+ if (i == 0)
+ goto out;
+
+ error = xfs_inobt_get_rec(cur, &rec, &i);
+ if (error)
+ goto error;
+ XFS_WANT_CORRUPTED_GOTO(i == 1, error);
+
+ if (rec.ir_startino > newino)
+ goto out;
+
+ ASSERT(rec.ir_startino <= newino &&
+ rec.ir_startino + XFS_INODES_PER_CHUNK > newino);
+ ASSERT(rec.ir_freecount + count <= XFS_INODES_PER_CHUNK);
+
+ *orec = rec;
+
+out:
+ xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
+ return 0;
+error:
+ xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
+ return error;
+}
+
+/*
* Allocate new inodes in the allocation group specified by agbp.
* Return 0 for success, else error code.
*/
--
1.8.3.1
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