An export point with the "mountpoint" option should not be exported
if it isn't a mount point.
For NFSv3, this is handled primarily by failing the MOUNT request.
For NFSv4, we must ensure a lookup from the pseduo-root fails too.
This means nfsd_export must check for the 'mountpoint' option and handle
it correctly.
Signed-off-by: NeilBrown <neilb@xxxxxxxx>
---
utils/mountd/cache.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/utils/mountd/cache.c b/utils/mountd/cache.c
index f33f66640c6c..19e7607e4fb1 100644
--- a/utils/mountd/cache.c
+++ b/utils/mountd/cache.c
@@ -1321,7 +1321,12 @@ static void nfsd_export(int f)
found = lookup_export(dom, path, ai);
if (found) {
- if (dump_to_cache(f, buf, sizeof(buf), dom, path, &found->m_export) < 0) {
+ if (found->m_export.e_mountpoint &&
+ !is_mountpoint(found->m_export.e_mountpoint[0]?
+ found->m_export.e_mountpoint:
+ found->m_export.e_path))
+ dump_to_cache(f, buf, sizeof(buf), dom, path, NULL);
+ else if (dump_to_cache(f, buf, sizeof(buf), dom, path, &found->m_export) < 0) {
xlog(L_WARNING,
"Cannot export %s, possibly unsupported filesystem"
" or fsid= required", path);
--
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