[RFC PATCH 1/3] NFSD: Teach nfsd_mountpoint() auto mounts

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Currently nfsd_mountpoint() tests for mount points using d_mountpoint(),
this works only when a mount point is already uncovered.
In our case the mount point is of type auto mount and can be coverted.
i.e. ->d_automount() was not called.

Using d_managed() nfsd_mountpoint() can test whether a mount point is
either already uncovered or can be uncovered later.

Signed-off-by: Richard Weinberger <richard@xxxxxx>
---
 fs/nfsd/vfs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index c99857689e2c..2f3352a99de6 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -160,7 +160,7 @@ int nfsd_mountpoint(struct dentry *dentry, struct svc_export *exp)
 		return 1;
 	if (nfsd4_is_junction(dentry))
 		return 1;
-	if (d_mountpoint(dentry))
+	if (d_managed(dentry))
 		/*
 		 * Might only be a mountpoint in a different namespace,
 		 * but we need to check.
-- 
2.26.2




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