vfs_isrdonly
if (mode & VMODIFY_PERMS && vfs_isrdonly(mp)) {
if (vfs_isrdonly(vnode_mount(vp))) {
if (islastcn && vfs_isrdonly(mp) && (nameiop != LOOKUP))
if (vfs_isrdonly(mp))
if (vfs_isrdonly(mp))
if (vfs_isrdonly(mp))
if (vfs_isrdonly(mp))
if (vfs_isrdonly(mp))
if (vfs_isrdonly(mp))
if (err == 0 && (fvdat->flag & FN_ATIMECHANGE) && !vfs_isrdonly(mp)) {