[PATCH] nfsd: Ensure nfsv4 calls the underlying filesystem on LOCKT

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From: Marc Eshel <eshel@xxxxxxxxxxxxxxx>

We need to add the following so vfs_test_lock() will call the underling
filesystem.

Signed-off-by: J. Bruce Fields <bfields@xxxxxxxxxxxxxx>
---
 fs/nfsd/nfs4state.c |    7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 6910374..83f8e21 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -2835,13 +2835,16 @@ nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 
 	nfs4_transform_lock_offset(&file_lock);
 
-	/* vfs_test_lock uses the struct file _only_ to resolve the inode.
+	/*
+	 * vfs_test_lock uses the struct file _only_ to resolve the inode.
 	 * since LOCKT doesn't require an OPEN, and therefore a struct
 	 * file may not exist, pass vfs_test_lock a struct file with
-	 * only the dentry:inode set.
+	 * only the dentry and i_fop (in case the filesystem defines
+	 * its own lock method) set.
 	 */
 	memset(&file, 0, sizeof (struct file));
 	file.f_path.dentry = cstate->current_fh.fh_dentry;
+	file.f_op = inode->i_fop;
 
 	status = nfs_ok;
 	error = vfs_test_lock(&file, &file_lock);
-- 
1.5.5.rc1

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