From: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
Connect the getfsmap ioctl to the realtime rmapbt.
Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
fs/xfs/xfs_fsmap.c | 66 ++++++++++++++++++++++++++++++++++++++++++++++++++--
1 file changed, 64 insertions(+), 2 deletions(-)
diff --git a/fs/xfs/xfs_fsmap.c b/fs/xfs/xfs_fsmap.c
index 918456ca29e1..b4d23f023520 100644
--- a/fs/xfs/xfs_fsmap.c
+++ b/fs/xfs/xfs_fsmap.c
@@ -24,6 +24,7 @@
#include "xfs_refcount_btree.h"
#include "xfs_alloc_btree.h"
#include "xfs_rtalloc.h"
+#include "xfs_rtrmap_btree.h"
/* Convert an xfs_fsmap to an fsmap. */
void
@@ -547,7 +548,65 @@ xfs_getfsmap_rtdev_rtbitmap(
return __xfs_getfsmap_rtdev(tp, keys, xfs_getfsmap_rtdev_rtbitmap_query,
info);
}
-#endif /* CONFIG_XFS_RT */
+
+/* Transform a absolute-startblock rmap (rtdev, logdev) into a fsmap */
+STATIC int
+xfs_getfsmap_rtdev_helper(
+ struct xfs_btree_cur *cur,
+ struct xfs_rmap_irec *rec,
+ void *priv)
+{
+ struct xfs_mount *mp = cur->bc_mp;
+ struct xfs_getfsmap_info *info = priv;
+ xfs_daddr_t rec_daddr;
+
+ rec_daddr = XFS_FSB_TO_BB(mp, rec->rm_startblock);
+
+ return xfs_getfsmap_helper(cur->bc_tp, info, rec, rec_daddr);
+}
+
+/* Actually query the rtrmap btree. */
+STATIC int
+xfs_getfsmap_rtdev_rmapbt_query(
+ struct xfs_trans *tp,
+ struct xfs_getfsmap_info *info)
+{
+ struct xfs_mount *mp = tp->t_mountp;
+ struct xfs_btree_cur *bt_cur;
+ int error;
+
+ /* Query the rtrmapbt */
+ xfs_ilock(mp->m_rrmapip, XFS_ILOCK_SHARED);
+ bt_cur = xfs_rtrmapbt_init_cursor(mp, tp, mp->m_rrmapip);
+ error = xfs_rmap_query_range(bt_cur, &info->low, &info->high,
+ xfs_getfsmap_rtdev_helper, info);
+ if (error)
+ goto err;
+
+ /* Report any gaps at the end of the rtrmapbt */
+ info->last = true;
+ error = xfs_getfsmap_rtdev_helper(bt_cur, &info->high, info);
+ if (error)
+ goto err;
+
+err:
+ xfs_btree_del_cursor(bt_cur, error);
+ xfs_iunlock(mp->m_rrmapip, XFS_ILOCK_SHARED);
+ return error;
+}
+
+/* Execute a getfsmap query against the realtime device rmapbt. */
+STATIC int
+xfs_getfsmap_rtdev_rmapbt(
+ struct xfs_trans *tp,
+ struct xfs_fsmap *keys,
+ struct xfs_getfsmap_info *info)
+{
+ info->missing_owner = XFS_FMR_OWN_FREE;
+ return __xfs_getfsmap_rtdev(tp, keys, xfs_getfsmap_rtdev_rmapbt_query,
+ info);
+}
+#endif
/* Execute a getfsmap query against the regular data device. */
STATIC int
@@ -851,7 +910,10 @@ xfs_getfsmap(
#ifdef CONFIG_XFS_RT
if (mp->m_rtdev_targp) {
handlers[2].dev = new_encode_dev(mp->m_rtdev_targp->bt_dev);
- handlers[2].fn = xfs_getfsmap_rtdev_rtbitmap;
+ if (use_rmap)
+ handlers[2].fn = xfs_getfsmap_rtdev_rmapbt;
+ else
+ handlers[2].fn = xfs_getfsmap_rtdev_rtbitmap;
}
#endif /* CONFIG_XFS_RT */
