From b3230e80a6d115d2eb50fe3f4794ad04d84766de Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Tue, 25 Apr 2017 10:56:19 -0400 Subject: pNFS: Ensure we check layout segment validity in the pg_init() callback If we have a layout segment cached in pgio->pg_lseg, we should check it for validity before reusing it in a new RPC request. Otherwise, if we recoalesce, we can end up looping forever. Signed-off-by: Trond Myklebust --- fs/nfs/filelayout/filelayout.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'fs/nfs/filelayout') diff --git a/fs/nfs/filelayout/filelayout.c b/fs/nfs/filelayout/filelayout.c index acd30baca461..d4174da89302 100644 --- a/fs/nfs/filelayout/filelayout.c +++ b/fs/nfs/filelayout/filelayout.c @@ -933,6 +933,7 @@ static void filelayout_pg_init_read(struct nfs_pageio_descriptor *pgio, struct nfs_page *req) { + pnfs_generic_pg_check_layout(pgio); if (!pgio->pg_lseg) { pgio->pg_lseg = fl_pnfs_update_layout(pgio->pg_inode, req->wb_context, @@ -959,6 +960,7 @@ filelayout_pg_init_write(struct nfs_pageio_descriptor *pgio, struct nfs_commit_info cinfo; int status; + pnfs_generic_pg_check_layout(pgio); if (!pgio->pg_lseg) { pgio->pg_lseg = fl_pnfs_update_layout(pgio->pg_inode, req->wb_context, -- cgit v1.2.1