NFS: Ensure nfs_wcc_update_inode always converts file size to loff_t

The nfs_wcc_update_inode() function omits logic to convert the type of
the NFS on-the-wire value of a file's size (__u64) to the type of file
size value stored in struct inode (loff_t, which is signed).

Everywhere else in the NFS client I checked already correctly converts the
file size type.

This effects only very large files.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index db5d96dc6107..cd0e57f3a00f 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -814,8 +814,9 @@ static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr)
                         if (S_ISDIR(inode->i_mode))
                                 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
                 }
-                if (inode->i_size == fattr->pre_size && nfsi->npages == 0)
-                        inode->i_size = fattr->size;
+                if (inode->i_size == nfs_size_to_loff_t(fattr->pre_size) &&
+                    nfsi->npages == 0)
+                        inode->i_size = nfs_size_to_loff_t(fattr->size);
         }
 }