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From:   trondmy@kernel.org
To:     linux-nfs@vger.kernel.org
Subject: [PATCH 2/3] NFS: Don't discard pNFS layout segments that are marked for return
Date:   Fri, 16 Apr 2021 08:51:20 -0400
Message-Id: <20210416125121.5753-2-trondmy@kernel.org>
In-Reply-To: <20210416125121.5753-1-trondmy@kernel.org>
References: <20210416125121.5753-1-trondmy@kernel.org>
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From: Trond Myklebust <trond.myklebust@hammerspace.com>

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>
---
 fs/nfs/pnfs.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index 102b66e0bdef..33574f47601f 100644
--- 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++;
-- 
2.30.2