Linux-libre 4.2-gnu

1 files changed, 0 insertions, 714 deletions

diff --git a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_lib-linux.c b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_lib-linux.c
deleted file mode 100644
index f5e8ab060..000000000
--- a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_lib-linux.c
+++ /dev/null
@@ -1,714 +0,0 @@
-/*
- * GPL HEADER START
- *
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 only,
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License version 2 for more details (a copy is included
- * in the LICENSE file that accompanied this code).
- *
- * You should have received a copy of the GNU General Public License
- * version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
- *
- * GPL HEADER END
- */
-/*
- * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
- * Use is subject to license terms.
- *
- * Copyright (c) 2011, 2012, Intel Corporation.
- */
-/*
- * This file is part of Lustre, http://www.lustre.org/
- * Lustre is a trademark of Sun Microsystems, Inc.
- */
-
-#include "socklnd.h"
-
-int
-ksocknal_lib_get_conn_addrs(ksock_conn_t *conn)
-{
-	int rc = libcfs_sock_getaddr(conn->ksnc_sock, 1,
-				     &conn->ksnc_ipaddr,
-				     &conn->ksnc_port);
-
-	/* Didn't need the {get,put}connsock dance to deref ksnc_sock... */
-	LASSERT(!conn->ksnc_closing);
-
-	if (rc != 0) {
-		CERROR("Error %d getting sock peer IP\n", rc);
-		return rc;
-	}
-
-	rc = libcfs_sock_getaddr(conn->ksnc_sock, 0,
-				 &conn->ksnc_myipaddr, NULL);
-	if (rc != 0) {
-		CERROR("Error %d getting sock local IP\n", rc);
-		return rc;
-	}
-
-	return 0;
-}
-
-int
-ksocknal_lib_zc_capable(ksock_conn_t *conn)
-{
-	int  caps = conn->ksnc_sock->sk->sk_route_caps;
-
-	if (conn->ksnc_proto == &ksocknal_protocol_v1x)
-		return 0;
-
-	/* ZC if the socket supports scatter/gather and doesn't need software
-	 * checksums */
-	return ((caps & NETIF_F_SG) != 0 && (caps & NETIF_F_ALL_CSUM) != 0);
-}
-
-int
-ksocknal_lib_send_iov(ksock_conn_t *conn, ksock_tx_t *tx)
-{
-	struct socket *sock = conn->ksnc_sock;
-	int	    nob;
-	int	    rc;
-
-	if (*ksocknal_tunables.ksnd_enable_csum	&& /* checksum enabled */
-	    conn->ksnc_proto == &ksocknal_protocol_v2x && /* V2.x connection  */
-	    tx->tx_nob == tx->tx_resid		 && /* frist sending    */
-	    tx->tx_msg.ksm_csum == 0)		     /* not checksummed  */
-		ksocknal_lib_csum_tx(tx);
-
-	/* NB we can't trust socket ops to either consume our iovs
-	 * or leave them alone. */
-
-	{
-#if SOCKNAL_SINGLE_FRAG_TX
-		struct kvec    scratch;
-		struct kvec   *scratchiov = &scratch;
-		unsigned int    niov = 1;
-#else
-		struct kvec   *scratchiov = conn->ksnc_scheduler->kss_scratch_iov;
-		unsigned int    niov = tx->tx_niov;
-#endif
-		struct msghdr msg = {.msg_flags = MSG_DONTWAIT};
-		int  i;
-
-		for (nob = i = 0; i < niov; i++) {
-			scratchiov[i] = tx->tx_iov[i];
-			nob += scratchiov[i].iov_len;
-		}
-
-		if (!list_empty(&conn->ksnc_tx_queue) ||
-		    nob < tx->tx_resid)
-			msg.msg_flags |= MSG_MORE;
-
-		rc = kernel_sendmsg(sock, &msg, scratchiov, niov, nob);
-	}
-	return rc;
-}
-
-int
-ksocknal_lib_send_kiov(ksock_conn_t *conn, ksock_tx_t *tx)
-{
-	struct socket *sock = conn->ksnc_sock;
-	lnet_kiov_t   *kiov = tx->tx_kiov;
-	int	    rc;
-	int	    nob;
-
-	/* Not NOOP message */
-	LASSERT(tx->tx_lnetmsg != NULL);
-
-	/* NB we can't trust socket ops to either consume our iovs
-	 * or leave them alone. */
-	if (tx->tx_msg.ksm_zc_cookies[0] != 0) {
-		/* Zero copy is enabled */
-		struct sock   *sk = sock->sk;
-		struct page   *page = kiov->kiov_page;
-		int	    offset = kiov->kiov_offset;
-		int	    fragsize = kiov->kiov_len;
-		int	    msgflg = MSG_DONTWAIT;
-
-		CDEBUG(D_NET, "page %p + offset %x for %d\n",
-			       page, offset, kiov->kiov_len);
-
-		if (!list_empty(&conn->ksnc_tx_queue) ||
-		    fragsize < tx->tx_resid)
-			msgflg |= MSG_MORE;
-
-		if (sk->sk_prot->sendpage != NULL) {
-			rc = sk->sk_prot->sendpage(sk, page,
-						   offset, fragsize, msgflg);
-		} else {
-			rc = cfs_tcp_sendpage(sk, page, offset, fragsize,
-					      msgflg);
-		}
-	} else {
-#if SOCKNAL_SINGLE_FRAG_TX || !SOCKNAL_RISK_KMAP_DEADLOCK
-		struct kvec  scratch;
-		struct kvec *scratchiov = &scratch;
-		unsigned int  niov = 1;
-#else
-#ifdef CONFIG_HIGHMEM
-#warning "XXX risk of kmap deadlock on multiple frags..."
-#endif
-		struct kvec *scratchiov = conn->ksnc_scheduler->kss_scratch_iov;
-		unsigned int  niov = tx->tx_nkiov;
-#endif
-		struct msghdr msg = {.msg_flags = MSG_DONTWAIT};
-		int	   i;
-
-		for (nob = i = 0; i < niov; i++) {
-			scratchiov[i].iov_base = kmap(kiov[i].kiov_page) +
-						 kiov[i].kiov_offset;
-			nob += scratchiov[i].iov_len = kiov[i].kiov_len;
-		}
-
-		if (!list_empty(&conn->ksnc_tx_queue) ||
-		    nob < tx->tx_resid)
-			msg.msg_flags |= MSG_MORE;
-
-		rc = kernel_sendmsg(sock, &msg, (struct kvec *)scratchiov, niov, nob);
-
-		for (i = 0; i < niov; i++)
-			kunmap(kiov[i].kiov_page);
-	}
-	return rc;
-}
-
-void
-ksocknal_lib_eager_ack(ksock_conn_t *conn)
-{
-	int	    opt = 1;
-	struct socket *sock = conn->ksnc_sock;
-
-	/* Remind the socket to ACK eagerly.  If I don't, the socket might
-	 * think I'm about to send something it could piggy-back the ACK
-	 * on, introducing delay in completing zero-copy sends in my
-	 * peer. */
-
-	kernel_setsockopt(sock, SOL_TCP, TCP_QUICKACK,
-			       (char *)&opt, sizeof(opt));
-}
-
-int
-ksocknal_lib_recv_iov(ksock_conn_t *conn)
-{
-#if SOCKNAL_SINGLE_FRAG_RX
-	struct kvec  scratch;
-	struct kvec *scratchiov = &scratch;
-	unsigned int  niov = 1;
-#else
-	struct kvec *scratchiov = conn->ksnc_scheduler->kss_scratch_iov;
-	unsigned int  niov = conn->ksnc_rx_niov;
-#endif
-	struct kvec *iov = conn->ksnc_rx_iov;
-	struct msghdr msg = {
-		.msg_flags      = 0
-	};
-	int	  nob;
-	int	  i;
-	int	  rc;
-	int	  fragnob;
-	int	  sum;
-	__u32	saved_csum;
-
-	/* NB we can't trust socket ops to either consume our iovs
-	 * or leave them alone. */
-	LASSERT(niov > 0);
-
-	for (nob = i = 0; i < niov; i++) {
-		scratchiov[i] = iov[i];
-		nob += scratchiov[i].iov_len;
-	}
-	LASSERT(nob <= conn->ksnc_rx_nob_wanted);
-
-	rc = kernel_recvmsg(conn->ksnc_sock, &msg,
-		scratchiov, niov, nob, MSG_DONTWAIT);
-
-	saved_csum = 0;
-	if (conn->ksnc_proto == &ksocknal_protocol_v2x) {
-		saved_csum = conn->ksnc_msg.ksm_csum;
-		conn->ksnc_msg.ksm_csum = 0;
-	}
-
-	if (saved_csum != 0) {
-		/* accumulate checksum */
-		for (i = 0, sum = rc; sum > 0; i++, sum -= fragnob) {
-			LASSERT(i < niov);
-
-			fragnob = iov[i].iov_len;
-			if (fragnob > sum)
-				fragnob = sum;
-
-			conn->ksnc_rx_csum = ksocknal_csum(conn->ksnc_rx_csum,
-							   iov[i].iov_base, fragnob);
-		}
-		conn->ksnc_msg.ksm_csum = saved_csum;
-	}
-
-	return rc;
-}
-
-static void
-ksocknal_lib_kiov_vunmap(void *addr)
-{
-	if (addr == NULL)
-		return;
-
-	vunmap(addr);
-}
-
-static void *
-ksocknal_lib_kiov_vmap(lnet_kiov_t *kiov, int niov,
-		       struct kvec *iov, struct page **pages)
-{
-	void	     *addr;
-	int	       nob;
-	int	       i;
-
-	if (!*ksocknal_tunables.ksnd_zc_recv || pages == NULL)
-		return NULL;
-
-	LASSERT(niov <= LNET_MAX_IOV);
-
-	if (niov < 2 ||
-	    niov < *ksocknal_tunables.ksnd_zc_recv_min_nfrags)
-		return NULL;
-
-	for (nob = i = 0; i < niov; i++) {
-		if ((kiov[i].kiov_offset != 0 && i > 0) ||
-		    (kiov[i].kiov_offset + kiov[i].kiov_len != PAGE_CACHE_SIZE && i < niov - 1))
-			return NULL;
-
-		pages[i] = kiov[i].kiov_page;
-		nob += kiov[i].kiov_len;
-	}
-
-	addr = vmap(pages, niov, VM_MAP, PAGE_KERNEL);
-	if (addr == NULL)
-		return NULL;
-
-	iov->iov_base = addr + kiov[0].kiov_offset;
-	iov->iov_len = nob;
-
-	return addr;
-}
-
-int
-ksocknal_lib_recv_kiov(ksock_conn_t *conn)
-{
-#if SOCKNAL_SINGLE_FRAG_RX || !SOCKNAL_RISK_KMAP_DEADLOCK
-	struct kvec   scratch;
-	struct kvec  *scratchiov = &scratch;
-	struct page  **pages      = NULL;
-	unsigned int   niov       = 1;
-#else
-#ifdef CONFIG_HIGHMEM
-#warning "XXX risk of kmap deadlock on multiple frags..."
-#endif
-	struct kvec  *scratchiov = conn->ksnc_scheduler->kss_scratch_iov;
-	struct page  **pages      = conn->ksnc_scheduler->kss_rx_scratch_pgs;
-	unsigned int   niov       = conn->ksnc_rx_nkiov;
-#endif
-	lnet_kiov_t   *kiov = conn->ksnc_rx_kiov;
-	struct msghdr msg = {
-		.msg_flags      = 0
-	};
-	int	  nob;
-	int	  i;
-	int	  rc;
-	void	*base;
-	void	*addr;
-	int	  sum;
-	int	  fragnob;
-	int n;
-
-	/* NB we can't trust socket ops to either consume our iovs
-	 * or leave them alone. */
-	addr = ksocknal_lib_kiov_vmap(kiov, niov, scratchiov, pages);
-	if (addr != NULL) {
-		nob = scratchiov[0].iov_len;
-		n = 1;
-
-	} else {
-		for (nob = i = 0; i < niov; i++) {
-			nob += scratchiov[i].iov_len = kiov[i].kiov_len;
-			scratchiov[i].iov_base = kmap(kiov[i].kiov_page) +
-						 kiov[i].kiov_offset;
-		}
-		n = niov;
-	}
-
-	LASSERT(nob <= conn->ksnc_rx_nob_wanted);
-
-	rc = kernel_recvmsg(conn->ksnc_sock, &msg,
-			(struct kvec *)scratchiov, n, nob, MSG_DONTWAIT);
-
-	if (conn->ksnc_msg.ksm_csum != 0) {
-		for (i = 0, sum = rc; sum > 0; i++, sum -= fragnob) {
-			LASSERT(i < niov);
-
-			/* Dang! have to kmap again because I have nowhere to stash the
-			 * mapped address.  But by doing it while the page is still
-			 * mapped, the kernel just bumps the map count and returns me
-			 * the address it stashed. */
-			base = kmap(kiov[i].kiov_page) + kiov[i].kiov_offset;
-			fragnob = kiov[i].kiov_len;
-			if (fragnob > sum)
-				fragnob = sum;
-
-			conn->ksnc_rx_csum = ksocknal_csum(conn->ksnc_rx_csum,
-							   base, fragnob);
-
-			kunmap(kiov[i].kiov_page);
-		}
-	}
-
-	if (addr != NULL) {
-		ksocknal_lib_kiov_vunmap(addr);
-	} else {
-		for (i = 0; i < niov; i++)
-			kunmap(kiov[i].kiov_page);
-	}
-
-	return rc;
-}
-
-void
-ksocknal_lib_csum_tx(ksock_tx_t *tx)
-{
-	int	  i;
-	__u32	csum;
-	void	*base;
-
-	LASSERT(tx->tx_iov[0].iov_base == &tx->tx_msg);
-	LASSERT(tx->tx_conn != NULL);
-	LASSERT(tx->tx_conn->ksnc_proto == &ksocknal_protocol_v2x);
-
-	tx->tx_msg.ksm_csum = 0;
-
-	csum = ksocknal_csum(~0, tx->tx_iov[0].iov_base,
-			     tx->tx_iov[0].iov_len);
-
-	if (tx->tx_kiov != NULL) {
-		for (i = 0; i < tx->tx_nkiov; i++) {
-			base = kmap(tx->tx_kiov[i].kiov_page) +
-			       tx->tx_kiov[i].kiov_offset;
-
-			csum = ksocknal_csum(csum, base, tx->tx_kiov[i].kiov_len);
-
-			kunmap(tx->tx_kiov[i].kiov_page);
-		}
-	} else {
-		for (i = 1; i < tx->tx_niov; i++)
-			csum = ksocknal_csum(csum, tx->tx_iov[i].iov_base,
-					     tx->tx_iov[i].iov_len);
-	}
-
-	if (*ksocknal_tunables.ksnd_inject_csum_error) {
-		csum++;
-		*ksocknal_tunables.ksnd_inject_csum_error = 0;
-	}
-
-	tx->tx_msg.ksm_csum = csum;
-}
-
-int
-ksocknal_lib_get_conn_tunables(ksock_conn_t *conn, int *txmem, int *rxmem, int *nagle)
-{
-	struct socket *sock = conn->ksnc_sock;
-	int	    len;
-	int	    rc;
-
-	rc = ksocknal_connsock_addref(conn);
-	if (rc != 0) {
-		LASSERT(conn->ksnc_closing);
-		*txmem = *rxmem = *nagle = 0;
-		return -ESHUTDOWN;
-	}
-
-	rc = libcfs_sock_getbuf(sock, txmem, rxmem);
-	if (rc == 0) {
-		len = sizeof(*nagle);
-		rc = kernel_getsockopt(sock, SOL_TCP, TCP_NODELAY,
-					   (char *)nagle, &len);
-	}
-
-	ksocknal_connsock_decref(conn);
-
-	if (rc == 0)
-		*nagle = !*nagle;
-	else
-		*txmem = *rxmem = *nagle = 0;
-
-	return rc;
-}
-
-int
-ksocknal_lib_setup_sock(struct socket *sock)
-{
-	int	     rc;
-	int	     option;
-	int	     keep_idle;
-	int	     keep_intvl;
-	int	     keep_count;
-	int	     do_keepalive;
-	struct linger   linger;
-
-	sock->sk->sk_allocation = GFP_NOFS;
-
-	/* Ensure this socket aborts active sends immediately when we close
-	 * it. */
-
-	linger.l_onoff = 0;
-	linger.l_linger = 0;
-
-	rc = kernel_setsockopt(sock, SOL_SOCKET, SO_LINGER,
-			      (char *)&linger, sizeof(linger));
-	if (rc != 0) {
-		CERROR("Can't set SO_LINGER: %d\n", rc);
-		return rc;
-	}
-
-	option = -1;
-	rc = kernel_setsockopt(sock, SOL_TCP, TCP_LINGER2,
-				    (char *)&option, sizeof(option));
-	if (rc != 0) {
-		CERROR("Can't set SO_LINGER2: %d\n", rc);
-		return rc;
-	}
-
-	if (!*ksocknal_tunables.ksnd_nagle) {
-		option = 1;
-
-		rc = kernel_setsockopt(sock, SOL_TCP, TCP_NODELAY,
-					    (char *)&option, sizeof(option));
-		if (rc != 0) {
-			CERROR("Can't disable nagle: %d\n", rc);
-			return rc;
-		}
-	}
-
-	rc = libcfs_sock_setbuf(sock,
-				*ksocknal_tunables.ksnd_tx_buffer_size,
-				*ksocknal_tunables.ksnd_rx_buffer_size);
-	if (rc != 0) {
-		CERROR("Can't set buffer tx %d, rx %d buffers: %d\n",
-			*ksocknal_tunables.ksnd_tx_buffer_size,
-			*ksocknal_tunables.ksnd_rx_buffer_size, rc);
-		return rc;
-	}
-
-/* TCP_BACKOFF_* sockopt tunables unsupported in stock kernels */
-
-	/* snapshot tunables */
-	keep_idle  = *ksocknal_tunables.ksnd_keepalive_idle;
-	keep_count = *ksocknal_tunables.ksnd_keepalive_count;
-	keep_intvl = *ksocknal_tunables.ksnd_keepalive_intvl;
-
-	do_keepalive = (keep_idle > 0 && keep_count > 0 && keep_intvl > 0);
-
-	option = (do_keepalive ? 1 : 0);
-	rc = kernel_setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE,
-			      (char *)&option, sizeof(option));
-	if (rc != 0) {
-		CERROR("Can't set SO_KEEPALIVE: %d\n", rc);
-		return rc;
-	}
-
-	if (!do_keepalive)
-		return 0;
-
-	rc = kernel_setsockopt(sock, SOL_TCP, TCP_KEEPIDLE,
-				    (char *)&keep_idle, sizeof(keep_idle));
-	if (rc != 0) {
-		CERROR("Can't set TCP_KEEPIDLE: %d\n", rc);
-		return rc;
-	}
-
-	rc = kernel_setsockopt(sock, SOL_TCP, TCP_KEEPINTVL,
-				    (char *)&keep_intvl, sizeof(keep_intvl));
-	if (rc != 0) {
-		CERROR("Can't set TCP_KEEPINTVL: %d\n", rc);
-		return rc;
-	}
-
-	rc = kernel_setsockopt(sock, SOL_TCP, TCP_KEEPCNT,
-				    (char *)&keep_count, sizeof(keep_count));
-	if (rc != 0) {
-		CERROR("Can't set TCP_KEEPCNT: %d\n", rc);
-		return rc;
-	}
-
-	return 0;
-}
-
-void
-ksocknal_lib_push_conn(ksock_conn_t *conn)
-{
-	struct sock    *sk;
-	struct tcp_sock *tp;
-	int	     nonagle;
-	int	     val = 1;
-	int	     rc;
-
-	rc = ksocknal_connsock_addref(conn);
-	if (rc != 0)			    /* being shut down */
-		return;
-
-	sk = conn->ksnc_sock->sk;
-	tp = tcp_sk(sk);
-
-	lock_sock(sk);
-	nonagle = tp->nonagle;
-	tp->nonagle = 1;
-	release_sock(sk);
-
-	rc = kernel_setsockopt(conn->ksnc_sock, SOL_TCP, TCP_NODELAY,
-				      (char *)&val, sizeof(val));
-	LASSERT(rc == 0);
-
-	lock_sock(sk);
-	tp->nonagle = nonagle;
-	release_sock(sk);
-
-	ksocknal_connsock_decref(conn);
-}
-
-extern void ksocknal_read_callback(ksock_conn_t *conn);
-extern void ksocknal_write_callback(ksock_conn_t *conn);
-/*
- * socket call back in Linux
- */
-static void
-ksocknal_data_ready(struct sock *sk)
-{
-	ksock_conn_t  *conn;
-
-	/* interleave correctly with closing sockets... */
-	LASSERT(!in_irq());
-	read_lock(&ksocknal_data.ksnd_global_lock);
-
-	conn = sk->sk_user_data;
-	if (conn == NULL) {	     /* raced with ksocknal_terminate_conn */
-		LASSERT(sk->sk_data_ready != &ksocknal_data_ready);
-		sk->sk_data_ready(sk);
-	} else
-		ksocknal_read_callback(conn);
-
-	read_unlock(&ksocknal_data.ksnd_global_lock);
-}
-
-static void
-ksocknal_write_space(struct sock *sk)
-{
-	ksock_conn_t  *conn;
-	int	    wspace;
-	int	    min_wpace;
-
-	/* interleave correctly with closing sockets... */
-	LASSERT(!in_irq());
-	read_lock(&ksocknal_data.ksnd_global_lock);
-
-	conn = sk->sk_user_data;
-	wspace = SOCKNAL_WSPACE(sk);
-	min_wpace = SOCKNAL_MIN_WSPACE(sk);
-
-	CDEBUG(D_NET, "sk %p wspace %d low water %d conn %p%s%s%s\n",
-	       sk, wspace, min_wpace, conn,
-	       (conn == NULL) ? "" : (conn->ksnc_tx_ready ?
-				      " ready" : " blocked"),
-	       (conn == NULL) ? "" : (conn->ksnc_tx_scheduled ?
-				      " scheduled" : " idle"),
-	       (conn == NULL) ? "" : (list_empty(&conn->ksnc_tx_queue) ?
-				      " empty" : " queued"));
-
-	if (conn == NULL) {	     /* raced with ksocknal_terminate_conn */
-		LASSERT(sk->sk_write_space != &ksocknal_write_space);
-		sk->sk_write_space(sk);
-
-		read_unlock(&ksocknal_data.ksnd_global_lock);
-		return;
-	}
-
-	if (wspace >= min_wpace) {	      /* got enough space */
-		ksocknal_write_callback(conn);
-
-		/* Clear SOCK_NOSPACE _after_ ksocknal_write_callback so the
-		 * ENOMEM check in ksocknal_transmit is race-free (think about
-		 * it). */
-
-		clear_bit(SOCK_NOSPACE, &sk->sk_socket->flags);
-	}
-
-	read_unlock(&ksocknal_data.ksnd_global_lock);
-}
-
-void
-ksocknal_lib_save_callback(struct socket *sock, ksock_conn_t *conn)
-{
-	conn->ksnc_saved_data_ready = sock->sk->sk_data_ready;
-	conn->ksnc_saved_write_space = sock->sk->sk_write_space;
-}
-
-void
-ksocknal_lib_set_callback(struct socket *sock,  ksock_conn_t *conn)
-{
-	sock->sk->sk_user_data = conn;
-	sock->sk->sk_data_ready = ksocknal_data_ready;
-	sock->sk->sk_write_space = ksocknal_write_space;
-	return;
-}
-
-void
-ksocknal_lib_reset_callback(struct socket *sock, ksock_conn_t *conn)
-{
-	/* Remove conn's network callbacks.
-	 * NB I _have_ to restore the callback, rather than storing a noop,
-	 * since the socket could survive past this module being unloaded!! */
-	sock->sk->sk_data_ready = conn->ksnc_saved_data_ready;
-	sock->sk->sk_write_space = conn->ksnc_saved_write_space;
-
-	/* A callback could be in progress already; they hold a read lock
-	 * on ksnd_global_lock (to serialise with me) and NOOP if
-	 * sk_user_data is NULL. */
-	sock->sk->sk_user_data = NULL;
-
-	return ;
-}
-
-int
-ksocknal_lib_memory_pressure(ksock_conn_t *conn)
-{
-	int	    rc = 0;
-	ksock_sched_t *sched;
-
-	sched = conn->ksnc_scheduler;
-	spin_lock_bh(&sched->kss_lock);
-
-	if (!test_bit(SOCK_NOSPACE, &conn->ksnc_sock->flags) &&
-	    !conn->ksnc_tx_ready) {
-		/* SOCK_NOSPACE is set when the socket fills
-		 * and cleared in the write_space callback
-		 * (which also sets ksnc_tx_ready).  If
-		 * SOCK_NOSPACE and ksnc_tx_ready are BOTH
-		 * zero, I didn't fill the socket and
-		 * write_space won't reschedule me, so I
-		 * return -ENOMEM to get my caller to retry
-		 * after a timeout */
-		rc = -ENOMEM;
-	}
-
-	spin_unlock_bh(&sched->kss_lock);
-
-	return rc;
-}