[PATCH 1/1] SQUASHME pnfs-submit zero layout stateid on last layout segment removal

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From: Andy Adamson <andros@xxxxxxxxxx>

Section 12.5.3 RFC 5661

"Once a client has no more layouts on a file, the layout stateid is no longer
valid and MUST NOT be used. Any attempt to use such a layout stateid will
result in NFS4ERR_BAD_STATEID."

Signed-off-by: Andy Adamson <andros@xxxxxxxxxx>
---
 fs/nfs/pnfs.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index 8b26104..3018ed6 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -625,6 +625,7 @@ pnfs_free_layout(struct pnfs_layout_type *lo,
 		spin_lock(&clp->cl_lock);
 		list_del_init(&lo->lo_layouts);
 		spin_unlock(&clp->cl_lock);
+		pnfs_set_layout_stateid(lo, &zero_stateid);
 	}
 
 	dprintk("%s:Return\n", __func__);
-- 
1.6.6

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