smb_fsop_read
rc = smb_fsop_read(sr, kcr, snode, NULL, &uio, 0);
rc = smb_fsop_read(sr, kcr, node, NULL, &uio, 0);
rc = smb_fsop_read(sr, src_ofile->f_cr,
rc = smb_fsop_read(sr, of->f_cr, of->f_node, of, uio, ioflag);
rc = smb_fsop_read(sr, sr->user_cr, node, ofile,
int smb_fsop_read(smb_request_t *, cred_t *, smb_node_t *, smb_ofile_t *,