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path: root/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_proto.c
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Diffstat (limited to 'drivers/staging/lustre/lnet/klnds/socklnd/socklnd_proto.c')
-rw-r--r--drivers/staging/lustre/lnet/klnds/socklnd/socklnd_proto.c810
1 files changed, 0 insertions, 810 deletions
diff --git a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_proto.c b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_proto.c
deleted file mode 100644
index 05982dac781c..000000000000
--- a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_proto.c
+++ /dev/null
@@ -1,810 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
- *
- * Copyright (c) 2012, Intel Corporation.
- *
- * Author: Zach Brown <zab@zabbo.net>
- * Author: Peter J. Braam <braam@clusterfs.com>
- * Author: Phil Schwan <phil@clusterfs.com>
- * Author: Eric Barton <eric@bartonsoftware.com>
- *
- * This file is part of Portals, http://www.sf.net/projects/sandiaportals/
- *
- * Portals is free software; you can redistribute it and/or
- * modify it under the terms of version 2 of the GNU General Public
- * License as published by the Free Software Foundation.
- *
- * Portals 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 for more details.
- *
- */
-
-#include "socklnd.h"
-
-/*
- * Protocol entries :
- * pro_send_hello : send hello message
- * pro_recv_hello : receive hello message
- * pro_pack : pack message header
- * pro_unpack : unpack message header
- * pro_queue_tx_zcack() : Called holding BH lock: kss_lock
- * return 1 if ACK is piggybacked, otherwise return 0
- * pro_queue_tx_msg() : Called holding BH lock: kss_lock
- * return the ACK that piggybacked by my message, or NULL
- * pro_handle_zcreq() : handler of incoming ZC-REQ
- * pro_handle_zcack() : handler of incoming ZC-ACK
- * pro_match_tx() : Called holding glock
- */
-
-static struct ksock_tx *
-ksocknal_queue_tx_msg_v1(struct ksock_conn *conn, struct ksock_tx *tx_msg)
-{
- /* V1.x, just enqueue it */
- list_add_tail(&tx_msg->tx_list, &conn->ksnc_tx_queue);
- return NULL;
-}
-
-void
-ksocknal_next_tx_carrier(struct ksock_conn *conn)
-{
- struct ksock_tx *tx = conn->ksnc_tx_carrier;
-
- /* Called holding BH lock: conn->ksnc_scheduler->kss_lock */
- LASSERT(!list_empty(&conn->ksnc_tx_queue));
- LASSERT(tx);
-
- /* Next TX that can carry ZC-ACK or LNet message */
- if (tx->tx_list.next == &conn->ksnc_tx_queue) {
- /* no more packets queued */
- conn->ksnc_tx_carrier = NULL;
- } else {
- conn->ksnc_tx_carrier = list_next_entry(tx, tx_list);
- LASSERT(conn->ksnc_tx_carrier->tx_msg.ksm_type == tx->tx_msg.ksm_type);
- }
-}
-
-static int
-ksocknal_queue_tx_zcack_v2(struct ksock_conn *conn,
- struct ksock_tx *tx_ack, __u64 cookie)
-{
- struct ksock_tx *tx = conn->ksnc_tx_carrier;
-
- LASSERT(!tx_ack ||
- tx_ack->tx_msg.ksm_type == KSOCK_MSG_NOOP);
-
- /*
- * Enqueue or piggyback tx_ack / cookie
- * . no tx can piggyback cookie of tx_ack (or cookie), just
- * enqueue the tx_ack (if tx_ack != NUL) and return NULL.
- * . There is tx can piggyback cookie of tx_ack (or cookie),
- * piggyback the cookie and return the tx.
- */
- if (!tx) {
- if (tx_ack) {
- list_add_tail(&tx_ack->tx_list,
- &conn->ksnc_tx_queue);
- conn->ksnc_tx_carrier = tx_ack;
- }
- return 0;
- }
-
- if (tx->tx_msg.ksm_type == KSOCK_MSG_NOOP) {
- /* tx is noop zc-ack, can't piggyback zc-ack cookie */
- if (tx_ack)
- list_add_tail(&tx_ack->tx_list,
- &conn->ksnc_tx_queue);
- return 0;
- }
-
- LASSERT(tx->tx_msg.ksm_type == KSOCK_MSG_LNET);
- LASSERT(!tx->tx_msg.ksm_zc_cookies[1]);
-
- if (tx_ack)
- cookie = tx_ack->tx_msg.ksm_zc_cookies[1];
-
- /* piggyback the zc-ack cookie */
- tx->tx_msg.ksm_zc_cookies[1] = cookie;
- /* move on to the next TX which can carry cookie */
- ksocknal_next_tx_carrier(conn);
-
- return 1;
-}
-
-static struct ksock_tx *
-ksocknal_queue_tx_msg_v2(struct ksock_conn *conn, struct ksock_tx *tx_msg)
-{
- struct ksock_tx *tx = conn->ksnc_tx_carrier;
-
- /*
- * Enqueue tx_msg:
- * . If there is no NOOP on the connection, just enqueue
- * tx_msg and return NULL
- * . If there is NOOP on the connection, piggyback the cookie
- * and replace the NOOP tx, and return the NOOP tx.
- */
- if (!tx) { /* nothing on queue */
- list_add_tail(&tx_msg->tx_list, &conn->ksnc_tx_queue);
- conn->ksnc_tx_carrier = tx_msg;
- return NULL;
- }
-
- if (tx->tx_msg.ksm_type == KSOCK_MSG_LNET) { /* nothing to carry */
- list_add_tail(&tx_msg->tx_list, &conn->ksnc_tx_queue);
- return NULL;
- }
-
- LASSERT(tx->tx_msg.ksm_type == KSOCK_MSG_NOOP);
-
- /* There is a noop zc-ack can be piggybacked */
- tx_msg->tx_msg.ksm_zc_cookies[1] = tx->tx_msg.ksm_zc_cookies[1];
- ksocknal_next_tx_carrier(conn);
-
- /* use new_tx to replace the noop zc-ack packet */
- list_add(&tx_msg->tx_list, &tx->tx_list);
- list_del(&tx->tx_list);
-
- return tx;
-}
-
-static int
-ksocknal_queue_tx_zcack_v3(struct ksock_conn *conn,
- struct ksock_tx *tx_ack, __u64 cookie)
-{
- struct ksock_tx *tx;
-
- if (conn->ksnc_type != SOCKLND_CONN_ACK)
- return ksocknal_queue_tx_zcack_v2(conn, tx_ack, cookie);
-
- /* non-blocking ZC-ACK (to router) */
- LASSERT(!tx_ack ||
- tx_ack->tx_msg.ksm_type == KSOCK_MSG_NOOP);
-
- tx = conn->ksnc_tx_carrier;
- if (!tx) {
- if (tx_ack) {
- list_add_tail(&tx_ack->tx_list,
- &conn->ksnc_tx_queue);
- conn->ksnc_tx_carrier = tx_ack;
- }
- return 0;
- }
-
- /* conn->ksnc_tx_carrier */
-
- if (tx_ack)
- cookie = tx_ack->tx_msg.ksm_zc_cookies[1];
-
- if (cookie == SOCKNAL_KEEPALIVE_PING) /* ignore keepalive PING */
- return 1;
-
- if (tx->tx_msg.ksm_zc_cookies[1] == SOCKNAL_KEEPALIVE_PING) {
- /* replace the keepalive PING with a real ACK */
- LASSERT(!tx->tx_msg.ksm_zc_cookies[0]);
- tx->tx_msg.ksm_zc_cookies[1] = cookie;
- return 1;
- }
-
- if (cookie == tx->tx_msg.ksm_zc_cookies[0] ||
- cookie == tx->tx_msg.ksm_zc_cookies[1]) {
- CWARN("%s: duplicated ZC cookie: %llu\n",
- libcfs_id2str(conn->ksnc_peer->ksnp_id), cookie);
- return 1; /* XXX return error in the future */
- }
-
- if (!tx->tx_msg.ksm_zc_cookies[0]) {
- /*
- * NOOP tx has only one ZC-ACK cookie,
- * can carry at least one more
- */
- if (tx->tx_msg.ksm_zc_cookies[1] > cookie) {
- tx->tx_msg.ksm_zc_cookies[0] = tx->tx_msg.ksm_zc_cookies[1];
- tx->tx_msg.ksm_zc_cookies[1] = cookie;
- } else {
- tx->tx_msg.ksm_zc_cookies[0] = cookie;
- }
-
- if (tx->tx_msg.ksm_zc_cookies[0] - tx->tx_msg.ksm_zc_cookies[1] > 2) {
- /*
- * not likely to carry more ACKs, skip it
- * to simplify logic
- */
- ksocknal_next_tx_carrier(conn);
- }
-
- return 1;
- }
-
- /* takes two or more cookies already */
-
- if (tx->tx_msg.ksm_zc_cookies[0] > tx->tx_msg.ksm_zc_cookies[1]) {
- __u64 tmp = 0;
-
- /* two separated cookies: (a+2, a) or (a+1, a) */
- LASSERT(tx->tx_msg.ksm_zc_cookies[0] -
- tx->tx_msg.ksm_zc_cookies[1] <= 2);
-
- if (tx->tx_msg.ksm_zc_cookies[0] -
- tx->tx_msg.ksm_zc_cookies[1] == 2) {
- if (cookie == tx->tx_msg.ksm_zc_cookies[1] + 1)
- tmp = cookie;
- } else if (cookie == tx->tx_msg.ksm_zc_cookies[1] - 1) {
- tmp = tx->tx_msg.ksm_zc_cookies[1];
- } else if (cookie == tx->tx_msg.ksm_zc_cookies[0] + 1) {
- tmp = tx->tx_msg.ksm_zc_cookies[0];
- }
-
- if (tmp) {
- /* range of cookies */
- tx->tx_msg.ksm_zc_cookies[0] = tmp - 1;
- tx->tx_msg.ksm_zc_cookies[1] = tmp + 1;
- return 1;
- }
-
- } else {
- /*
- * ksm_zc_cookies[0] < ksm_zc_cookies[1],
- * it is range of cookies
- */
- if (cookie >= tx->tx_msg.ksm_zc_cookies[0] &&
- cookie <= tx->tx_msg.ksm_zc_cookies[1]) {
- CWARN("%s: duplicated ZC cookie: %llu\n",
- libcfs_id2str(conn->ksnc_peer->ksnp_id), cookie);
- return 1; /* XXX: return error in the future */
- }
-
- if (cookie == tx->tx_msg.ksm_zc_cookies[1] + 1) {
- tx->tx_msg.ksm_zc_cookies[1] = cookie;
- return 1;
- }
-
- if (cookie == tx->tx_msg.ksm_zc_cookies[0] - 1) {
- tx->tx_msg.ksm_zc_cookies[0] = cookie;
- return 1;
- }
- }
-
- /* failed to piggyback ZC-ACK */
- if (tx_ack) {
- list_add_tail(&tx_ack->tx_list, &conn->ksnc_tx_queue);
- /* the next tx can piggyback at least 1 ACK */
- ksocknal_next_tx_carrier(conn);
- }
-
- return 0;
-}
-
-static int
-ksocknal_match_tx(struct ksock_conn *conn, struct ksock_tx *tx, int nonblk)
-{
- int nob;
-
-#if SOCKNAL_VERSION_DEBUG
- if (!*ksocknal_tunables.ksnd_typed_conns)
- return SOCKNAL_MATCH_YES;
-#endif
-
- if (!tx || !tx->tx_lnetmsg) {
- /* noop packet */
- nob = offsetof(struct ksock_msg, ksm_u);
- } else {
- nob = tx->tx_lnetmsg->msg_len +
- ((conn->ksnc_proto == &ksocknal_protocol_v1x) ?
- sizeof(struct lnet_hdr) : sizeof(struct ksock_msg));
- }
-
- /* default checking for typed connection */
- switch (conn->ksnc_type) {
- default:
- CERROR("ksnc_type bad: %u\n", conn->ksnc_type);
- LBUG();
- case SOCKLND_CONN_ANY:
- return SOCKNAL_MATCH_YES;
-
- case SOCKLND_CONN_BULK_IN:
- return SOCKNAL_MATCH_MAY;
-
- case SOCKLND_CONN_BULK_OUT:
- if (nob < *ksocknal_tunables.ksnd_min_bulk)
- return SOCKNAL_MATCH_MAY;
- else
- return SOCKNAL_MATCH_YES;
-
- case SOCKLND_CONN_CONTROL:
- if (nob >= *ksocknal_tunables.ksnd_min_bulk)
- return SOCKNAL_MATCH_MAY;
- else
- return SOCKNAL_MATCH_YES;
- }
-}
-
-static int
-ksocknal_match_tx_v3(struct ksock_conn *conn, struct ksock_tx *tx, int nonblk)
-{
- int nob;
-
- if (!tx || !tx->tx_lnetmsg)
- nob = offsetof(struct ksock_msg, ksm_u);
- else
- nob = tx->tx_lnetmsg->msg_len + sizeof(struct ksock_msg);
-
- switch (conn->ksnc_type) {
- default:
- CERROR("ksnc_type bad: %u\n", conn->ksnc_type);
- LBUG();
- case SOCKLND_CONN_ANY:
- return SOCKNAL_MATCH_NO;
-
- case SOCKLND_CONN_ACK:
- if (nonblk)
- return SOCKNAL_MATCH_YES;
- else if (!tx || !tx->tx_lnetmsg)
- return SOCKNAL_MATCH_MAY;
- else
- return SOCKNAL_MATCH_NO;
-
- case SOCKLND_CONN_BULK_OUT:
- if (nonblk)
- return SOCKNAL_MATCH_NO;
- else if (nob < *ksocknal_tunables.ksnd_min_bulk)
- return SOCKNAL_MATCH_MAY;
- else
- return SOCKNAL_MATCH_YES;
-
- case SOCKLND_CONN_CONTROL:
- if (nonblk)
- return SOCKNAL_MATCH_NO;
- else if (nob >= *ksocknal_tunables.ksnd_min_bulk)
- return SOCKNAL_MATCH_MAY;
- else
- return SOCKNAL_MATCH_YES;
- }
-}
-
-/* (Sink) handle incoming ZC request from sender */
-static int
-ksocknal_handle_zcreq(struct ksock_conn *c, __u64 cookie, int remote)
-{
- struct ksock_peer *peer = c->ksnc_peer;
- struct ksock_conn *conn;
- struct ksock_tx *tx;
- int rc;
-
- read_lock(&ksocknal_data.ksnd_global_lock);
-
- conn = ksocknal_find_conn_locked(peer, NULL, !!remote);
- if (conn) {
- struct ksock_sched *sched = conn->ksnc_scheduler;
-
- LASSERT(conn->ksnc_proto->pro_queue_tx_zcack);
-
- spin_lock_bh(&sched->kss_lock);
-
- rc = conn->ksnc_proto->pro_queue_tx_zcack(conn, NULL, cookie);
-
- spin_unlock_bh(&sched->kss_lock);
-
- if (rc) { /* piggybacked */
- read_unlock(&ksocknal_data.ksnd_global_lock);
- return 0;
- }
- }
-
- read_unlock(&ksocknal_data.ksnd_global_lock);
-
- /* ACK connection is not ready, or can't piggyback the ACK */
- tx = ksocknal_alloc_tx_noop(cookie, !!remote);
- if (!tx)
- return -ENOMEM;
-
- rc = ksocknal_launch_packet(peer->ksnp_ni, tx, peer->ksnp_id);
- if (!rc)
- return 0;
-
- ksocknal_free_tx(tx);
- return rc;
-}
-
-/* (Sender) handle ZC_ACK from sink */
-static int
-ksocknal_handle_zcack(struct ksock_conn *conn, __u64 cookie1, __u64 cookie2)
-{
- struct ksock_peer *peer = conn->ksnc_peer;
- struct ksock_tx *tx;
- struct ksock_tx *temp;
- struct ksock_tx *tmp;
- LIST_HEAD(zlist);
- int count;
-
- if (!cookie1)
- cookie1 = cookie2;
-
- count = (cookie1 > cookie2) ? 2 : (cookie2 - cookie1 + 1);
-
- if (cookie2 == SOCKNAL_KEEPALIVE_PING &&
- conn->ksnc_proto == &ksocknal_protocol_v3x) {
- /* keepalive PING for V3.x, just ignore it */
- return count == 1 ? 0 : -EPROTO;
- }
-
- spin_lock(&peer->ksnp_lock);
-
- list_for_each_entry_safe(tx, tmp, &peer->ksnp_zc_req_list,
- tx_zc_list) {
- __u64 c = tx->tx_msg.ksm_zc_cookies[0];
-
- if (c == cookie1 || c == cookie2 ||
- (cookie1 < c && c < cookie2)) {
- tx->tx_msg.ksm_zc_cookies[0] = 0;
- list_del(&tx->tx_zc_list);
- list_add(&tx->tx_zc_list, &zlist);
-
- if (!--count)
- break;
- }
- }
-
- spin_unlock(&peer->ksnp_lock);
-
- list_for_each_entry_safe(tx, temp, &zlist, tx_zc_list) {
- list_del(&tx->tx_zc_list);
- ksocknal_tx_decref(tx);
- }
-
- return !count ? 0 : -EPROTO;
-}
-
-static int
-ksocknal_send_hello_v1(struct ksock_conn *conn, struct ksock_hello_msg *hello)
-{
- struct socket *sock = conn->ksnc_sock;
- struct lnet_hdr *hdr;
- struct lnet_magicversion *hmv;
- int rc;
- int i;
-
- BUILD_BUG_ON(sizeof(struct lnet_magicversion) != offsetof(struct lnet_hdr, src_nid));
-
- hdr = kzalloc(sizeof(*hdr), GFP_NOFS);
- if (!hdr) {
- CERROR("Can't allocate struct lnet_hdr\n");
- return -ENOMEM;
- }
-
- hmv = (struct lnet_magicversion *)&hdr->dest_nid;
-
- /*
- * Re-organize V2.x message header to V1.x (struct lnet_hdr)
- * header and send out
- */
- hmv->magic = cpu_to_le32(LNET_PROTO_TCP_MAGIC);
- hmv->version_major = cpu_to_le16(KSOCK_PROTO_V1_MAJOR);
- hmv->version_minor = cpu_to_le16(KSOCK_PROTO_V1_MINOR);
-
- if (the_lnet.ln_testprotocompat) {
- /* single-shot proto check */
- LNET_LOCK();
- if (the_lnet.ln_testprotocompat & 1) {
- hmv->version_major++; /* just different! */
- the_lnet.ln_testprotocompat &= ~1;
- }
- if (the_lnet.ln_testprotocompat & 2) {
- hmv->magic = LNET_PROTO_MAGIC;
- the_lnet.ln_testprotocompat &= ~2;
- }
- LNET_UNLOCK();
- }
-
- hdr->src_nid = cpu_to_le64(hello->kshm_src_nid);
- hdr->src_pid = cpu_to_le32(hello->kshm_src_pid);
- hdr->type = cpu_to_le32(LNET_MSG_HELLO);
- hdr->payload_length = cpu_to_le32(hello->kshm_nips * sizeof(__u32));
- hdr->msg.hello.type = cpu_to_le32(hello->kshm_ctype);
- hdr->msg.hello.incarnation = cpu_to_le64(hello->kshm_src_incarnation);
-
- rc = lnet_sock_write(sock, hdr, sizeof(*hdr), lnet_acceptor_timeout());
- if (rc) {
- CNETERR("Error %d sending HELLO hdr to %pI4h/%d\n",
- rc, &conn->ksnc_ipaddr, conn->ksnc_port);
- goto out;
- }
-
- if (!hello->kshm_nips)
- goto out;
-
- for (i = 0; i < (int)hello->kshm_nips; i++)
- hello->kshm_ips[i] = __cpu_to_le32(hello->kshm_ips[i]);
-
- rc = lnet_sock_write(sock, hello->kshm_ips,
- hello->kshm_nips * sizeof(__u32),
- lnet_acceptor_timeout());
- if (rc) {
- CNETERR("Error %d sending HELLO payload (%d) to %pI4h/%d\n",
- rc, hello->kshm_nips,
- &conn->ksnc_ipaddr, conn->ksnc_port);
- }
-out:
- kfree(hdr);
-
- return rc;
-}
-
-static int
-ksocknal_send_hello_v2(struct ksock_conn *conn, struct ksock_hello_msg *hello)
-{
- struct socket *sock = conn->ksnc_sock;
- int rc;
-
- hello->kshm_magic = LNET_PROTO_MAGIC;
- hello->kshm_version = conn->ksnc_proto->pro_version;
-
- if (the_lnet.ln_testprotocompat) {
- /* single-shot proto check */
- LNET_LOCK();
- if (the_lnet.ln_testprotocompat & 1) {
- hello->kshm_version++; /* just different! */
- the_lnet.ln_testprotocompat &= ~1;
- }
- LNET_UNLOCK();
- }
-
- rc = lnet_sock_write(sock, hello, offsetof(struct ksock_hello_msg, kshm_ips),
- lnet_acceptor_timeout());
- if (rc) {
- CNETERR("Error %d sending HELLO hdr to %pI4h/%d\n",
- rc, &conn->ksnc_ipaddr, conn->ksnc_port);
- return rc;
- }
-
- if (!hello->kshm_nips)
- return 0;
-
- rc = lnet_sock_write(sock, hello->kshm_ips,
- hello->kshm_nips * sizeof(__u32),
- lnet_acceptor_timeout());
- if (rc) {
- CNETERR("Error %d sending HELLO payload (%d) to %pI4h/%d\n",
- rc, hello->kshm_nips,
- &conn->ksnc_ipaddr, conn->ksnc_port);
- }
-
- return rc;
-}
-
-static int
-ksocknal_recv_hello_v1(struct ksock_conn *conn, struct ksock_hello_msg *hello,
- int timeout)
-{
- struct socket *sock = conn->ksnc_sock;
- struct lnet_hdr *hdr;
- int rc;
- int i;
-
- hdr = kzalloc(sizeof(*hdr), GFP_NOFS);
- if (!hdr) {
- CERROR("Can't allocate struct lnet_hdr\n");
- return -ENOMEM;
- }
-
- rc = lnet_sock_read(sock, &hdr->src_nid,
- sizeof(*hdr) - offsetof(struct lnet_hdr, src_nid),
- timeout);
- if (rc) {
- CERROR("Error %d reading rest of HELLO hdr from %pI4h\n",
- rc, &conn->ksnc_ipaddr);
- LASSERT(rc < 0 && rc != -EALREADY);
- goto out;
- }
-
- /* ...and check we got what we expected */
- if (hdr->type != cpu_to_le32(LNET_MSG_HELLO)) {
- CERROR("Expecting a HELLO hdr, but got type %d from %pI4h\n",
- le32_to_cpu(hdr->type),
- &conn->ksnc_ipaddr);
- rc = -EPROTO;
- goto out;
- }
-
- hello->kshm_src_nid = le64_to_cpu(hdr->src_nid);
- hello->kshm_src_pid = le32_to_cpu(hdr->src_pid);
- hello->kshm_src_incarnation = le64_to_cpu(hdr->msg.hello.incarnation);
- hello->kshm_ctype = le32_to_cpu(hdr->msg.hello.type);
- hello->kshm_nips = le32_to_cpu(hdr->payload_length) /
- sizeof(__u32);
-
- if (hello->kshm_nips > LNET_MAX_INTERFACES) {
- CERROR("Bad nips %d from ip %pI4h\n",
- hello->kshm_nips, &conn->ksnc_ipaddr);
- rc = -EPROTO;
- goto out;
- }
-
- if (!hello->kshm_nips)
- goto out;
-
- rc = lnet_sock_read(sock, hello->kshm_ips,
- hello->kshm_nips * sizeof(__u32), timeout);
- if (rc) {
- CERROR("Error %d reading IPs from ip %pI4h\n",
- rc, &conn->ksnc_ipaddr);
- LASSERT(rc < 0 && rc != -EALREADY);
- goto out;
- }
-
- for (i = 0; i < (int)hello->kshm_nips; i++) {
- hello->kshm_ips[i] = __le32_to_cpu(hello->kshm_ips[i]);
-
- if (!hello->kshm_ips[i]) {
- CERROR("Zero IP[%d] from ip %pI4h\n",
- i, &conn->ksnc_ipaddr);
- rc = -EPROTO;
- break;
- }
- }
-out:
- kfree(hdr);
-
- return rc;
-}
-
-static int
-ksocknal_recv_hello_v2(struct ksock_conn *conn, struct ksock_hello_msg *hello,
- int timeout)
-{
- struct socket *sock = conn->ksnc_sock;
- int rc;
- int i;
-
- if (hello->kshm_magic == LNET_PROTO_MAGIC)
- conn->ksnc_flip = 0;
- else
- conn->ksnc_flip = 1;
-
- rc = lnet_sock_read(sock, &hello->kshm_src_nid,
- offsetof(struct ksock_hello_msg, kshm_ips) -
- offsetof(struct ksock_hello_msg, kshm_src_nid),
- timeout);
- if (rc) {
- CERROR("Error %d reading HELLO from %pI4h\n",
- rc, &conn->ksnc_ipaddr);
- LASSERT(rc < 0 && rc != -EALREADY);
- return rc;
- }
-
- if (conn->ksnc_flip) {
- __swab32s(&hello->kshm_src_pid);
- __swab64s(&hello->kshm_src_nid);
- __swab32s(&hello->kshm_dst_pid);
- __swab64s(&hello->kshm_dst_nid);
- __swab64s(&hello->kshm_src_incarnation);
- __swab64s(&hello->kshm_dst_incarnation);
- __swab32s(&hello->kshm_ctype);
- __swab32s(&hello->kshm_nips);
- }
-
- if (hello->kshm_nips > LNET_MAX_INTERFACES) {
- CERROR("Bad nips %d from ip %pI4h\n",
- hello->kshm_nips, &conn->ksnc_ipaddr);
- return -EPROTO;
- }
-
- if (!hello->kshm_nips)
- return 0;
-
- rc = lnet_sock_read(sock, hello->kshm_ips,
- hello->kshm_nips * sizeof(__u32), timeout);
- if (rc) {
- CERROR("Error %d reading IPs from ip %pI4h\n",
- rc, &conn->ksnc_ipaddr);
- LASSERT(rc < 0 && rc != -EALREADY);
- return rc;
- }
-
- for (i = 0; i < (int)hello->kshm_nips; i++) {
- if (conn->ksnc_flip)
- __swab32s(&hello->kshm_ips[i]);
-
- if (!hello->kshm_ips[i]) {
- CERROR("Zero IP[%d] from ip %pI4h\n",
- i, &conn->ksnc_ipaddr);
- return -EPROTO;
- }
- }
-
- return 0;
-}
-
-static void
-ksocknal_pack_msg_v1(struct ksock_tx *tx)
-{
- /* V1.x has no KSOCK_MSG_NOOP */
- LASSERT(tx->tx_msg.ksm_type != KSOCK_MSG_NOOP);
- LASSERT(tx->tx_lnetmsg);
-
- tx->tx_iov[0].iov_base = &tx->tx_lnetmsg->msg_hdr;
- tx->tx_iov[0].iov_len = sizeof(struct lnet_hdr);
-
- tx->tx_nob = tx->tx_lnetmsg->msg_len + sizeof(struct lnet_hdr);
- tx->tx_resid = tx->tx_lnetmsg->msg_len + sizeof(struct lnet_hdr);
-}
-
-static void
-ksocknal_pack_msg_v2(struct ksock_tx *tx)
-{
- tx->tx_iov[0].iov_base = &tx->tx_msg;
-
- if (tx->tx_lnetmsg) {
- LASSERT(tx->tx_msg.ksm_type != KSOCK_MSG_NOOP);
-
- tx->tx_msg.ksm_u.lnetmsg.ksnm_hdr = tx->tx_lnetmsg->msg_hdr;
- tx->tx_iov[0].iov_len = sizeof(struct ksock_msg);
- tx->tx_nob = sizeof(struct ksock_msg) + tx->tx_lnetmsg->msg_len;
- tx->tx_resid = sizeof(struct ksock_msg) + tx->tx_lnetmsg->msg_len;
- } else {
- LASSERT(tx->tx_msg.ksm_type == KSOCK_MSG_NOOP);
-
- tx->tx_iov[0].iov_len = offsetof(struct ksock_msg, ksm_u.lnetmsg.ksnm_hdr);
- tx->tx_nob = offsetof(struct ksock_msg, ksm_u.lnetmsg.ksnm_hdr);
- tx->tx_resid = offsetof(struct ksock_msg, ksm_u.lnetmsg.ksnm_hdr);
- }
- /*
- * Don't checksum before start sending, because packet can be
- * piggybacked with ACK
- */
-}
-
-static void
-ksocknal_unpack_msg_v1(struct ksock_msg *msg)
-{
- msg->ksm_csum = 0;
- msg->ksm_type = KSOCK_MSG_LNET;
- msg->ksm_zc_cookies[0] = 0;
- msg->ksm_zc_cookies[1] = 0;
-}
-
-static void
-ksocknal_unpack_msg_v2(struct ksock_msg *msg)
-{
- return; /* Do nothing */
-}
-
-struct ksock_proto ksocknal_protocol_v1x = {
- .pro_version = KSOCK_PROTO_V1,
- .pro_send_hello = ksocknal_send_hello_v1,
- .pro_recv_hello = ksocknal_recv_hello_v1,
- .pro_pack = ksocknal_pack_msg_v1,
- .pro_unpack = ksocknal_unpack_msg_v1,
- .pro_queue_tx_msg = ksocknal_queue_tx_msg_v1,
- .pro_handle_zcreq = NULL,
- .pro_handle_zcack = NULL,
- .pro_queue_tx_zcack = NULL,
- .pro_match_tx = ksocknal_match_tx
-};
-
-struct ksock_proto ksocknal_protocol_v2x = {
- .pro_version = KSOCK_PROTO_V2,
- .pro_send_hello = ksocknal_send_hello_v2,
- .pro_recv_hello = ksocknal_recv_hello_v2,
- .pro_pack = ksocknal_pack_msg_v2,
- .pro_unpack = ksocknal_unpack_msg_v2,
- .pro_queue_tx_msg = ksocknal_queue_tx_msg_v2,
- .pro_queue_tx_zcack = ksocknal_queue_tx_zcack_v2,
- .pro_handle_zcreq = ksocknal_handle_zcreq,
- .pro_handle_zcack = ksocknal_handle_zcack,
- .pro_match_tx = ksocknal_match_tx
-};
-
-struct ksock_proto ksocknal_protocol_v3x = {
- .pro_version = KSOCK_PROTO_V3,
- .pro_send_hello = ksocknal_send_hello_v2,
- .pro_recv_hello = ksocknal_recv_hello_v2,
- .pro_pack = ksocknal_pack_msg_v2,
- .pro_unpack = ksocknal_unpack_msg_v2,
- .pro_queue_tx_msg = ksocknal_queue_tx_msg_v2,
- .pro_queue_tx_zcack = ksocknal_queue_tx_zcack_v3,
- .pro_handle_zcreq = ksocknal_handle_zcreq,
- .pro_handle_zcack = ksocknal_handle_zcack,
- .pro_match_tx = ksocknal_match_tx_v3
-};
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.