1409 devfs_read_f(struct file *fp, struct uio *uio, struct ucred *cred,  in devfs_read_f()  argument
1418 	if (uio->uio_resid > DEVFS_IOSIZE_MAX)  in devfs_read_f()
1423 		error = vnops.fo_read(fp, uio, cred, flags, td);  in devfs_read_f()
1426 	resid = uio->uio_resid;  in devfs_read_f()
1431 	foffset_lock_uio(fp, uio, flags | FOF_NOLOCK);  in devfs_read_f()
1432 	error = dsw->d_read(dev, uio, ioflag);  in devfs_read_f()
1433 	if (uio->uio_resid != resid || (error == 0 && resid != 0))  in devfs_read_f()
1438 	foffset_unlock_uio(fp, uio, flags | FOF_NOLOCK | FOF_NEXTOFF_R);  in devfs_read_f()
1446 	struct uio *uio;  in devfs_readdir()  local
1457 	uio = ap->a_uio;  in devfs_readdir()
1458 	if (uio->uio_offset < 0)  in devfs_readdir()
1489 		if (devfs_prison_check(dd, uio->uio_td))  in devfs_readdir()
1497 		if (dp->d_reclen > uio->uio_resid)  in devfs_readdir()
1502 		if (off >= uio->uio_offset) {  in devfs_readdir()
1510 	uio->uio_offset = off;  in devfs_readdir()
1915 devfs_write_f(struct file *fp, struct uio *uio, struct ucred *cred,  in devfs_write_f()  argument
1924 	if (uio->uio_resid > DEVFS_IOSIZE_MAX)  in devfs_write_f()
1929 		error = vnops.fo_write(fp, uio, cred, flags, td);  in devfs_write_f()
1932 	KASSERT(uio->uio_td == td, ("uio_td %p is not td %p", uio->uio_td, td));  in devfs_write_f()
1936 	foffset_lock_uio(fp, uio, flags | FOF_NOLOCK);  in devfs_write_f()
1938 	resid = uio->uio_resid;  in devfs_write_f()
1940 	error = dsw->d_write(dev, uio, ioflag);  in devfs_write_f()
1941 	if (uio->uio_resid != resid || (error == 0 && resid != 0)) {  in devfs_write_f()
1948 	foffset_unlock_uio(fp, uio, flags | FOF_NOLOCK | FOF_NEXTOFF_W);  in devfs_write_f()