NFS: Don't discard pNFS layout segments that are marked for return

If the pNFS layout segment is marked with the NFS_LSEG_LAYOUTRETURN
flag, then the assumption is that it has some reporting requirement
to perform through a layoutreturn (e.g. flexfiles layout stats or error
information).

Fixes: e0b7d420f72a ("pNFS: Don't discard layout segments that are marked for return")
Cc: stable@vger.kernel.org
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>

diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index 102b66e..33574f4 100644 (file)
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -2468,6 +2468,9 @@ pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo,
 
        assert_spin_locked(&lo->plh_inode->i_lock);
 
+       if (test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags))
+               tmp_list = &lo->plh_return_segs;
+
        list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list)
                if (pnfs_match_lseg_recall(lseg, return_range, seq)) {
                        dprintk("%s: marking lseg %p iomode %d "
@@ -2475,6 +2478,8 @@ pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo,
                                lseg, lseg->pls_range.iomode,
                                lseg->pls_range.offset,
                                lseg->pls_range.length);
+                       if (test_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags))
+                               tmp_list = &lo->plh_return_segs;
                        if (mark_lseg_invalid(lseg, tmp_list))
                                continue;
                        remaining++;