nfsd: make sure data is on disk before calling ->fsync

nfsd is not using vfs_fsync, so I missed it when changing the calling
convention during the 2.6.32 window.  This patch fixes it to not only
start the data writeout, but also wait for it to complete before calling
into ->fsync.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: stable@kernel.org
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>

diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index e3ef3ec0efd0675c6c8d5d5a4a154ec0cca6b80c..d5fe17cb07e3f6f7717574dbd151146a5fb25c97 100644 (file)
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -782,12 +782,9 @@ static inline int nfsd_dosync(struct file *filp, struct dentry *dp,
        int (*fsync) (struct file *, struct dentry *, int);
        int err;
 
-       err = filemap_fdatawrite(inode->i_mapping);
+       err = filemap_write_and_wait(inode->i_mapping);
        if (err == 0 && fop && (fsync = fop->fsync))
                err = fsync(filp, dp, 0);
-       if (err == 0)
-               err = filemap_fdatawait(inode->i_mapping);
-
        return err;
 }