[SMB3] Fix oops when creating symlinks on smb3



We were not checking for symlink support properly for SMB2/SMB3
mounts so could oops when mounted with mfsymlinks when try
to create symlink when mfsymlinks on smb2/smb3 mounts

Signed-off-by: Steve French <smfrench@gmail.com>
Cc: <stable@vger.kernel.org> # 3.14+
CC: Sachin Prabhu <sprabhu@redhat.com>

parent 2ae83bf9

fs/cifs/link.c

+6 −2

Original line number	Diff line number	Diff line
		@@ -213,8 +213,12 @@ create_mf_symlink(const unsigned int xid, struct cifs_tcon *tcon,
		if (rc)
		goto out;

		rc = tcon->ses->server->ops->create_mf_symlink(xid, tcon, cifs_sb,
		fromName, buf, &bytes_written);
		if (tcon->ses->server->ops->create_mf_symlink)
		rc = tcon->ses->server->ops->create_mf_symlink(xid, tcon,
		cifs_sb, fromName, buf, &bytes_written);
		else
		rc = -EOPNOTSUPP;

		if (rc)
		goto out;