2013-04-17 00:18:28 -06:00
|
|
|
/*
|
|
|
|
* net/tipc/ib_media.c: Infiniband bearer support for TIPC
|
|
|
|
*
|
|
|
|
* Copyright (c) 2013 Patrick McHardy <kaber@trash.net>
|
|
|
|
*
|
|
|
|
* Based on eth_media.c, which carries the following copyright notice:
|
|
|
|
*
|
|
|
|
* Copyright (c) 2001-2007, Ericsson AB
|
|
|
|
* Copyright (c) 2005-2008, 2011, Wind River Systems
|
|
|
|
* All rights reserved.
|
|
|
|
*
|
|
|
|
* Redistribution and use in source and binary forms, with or without
|
|
|
|
* modification, are permitted provided that the following conditions are met:
|
|
|
|
*
|
|
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
|
|
* notice, this list of conditions and the following disclaimer.
|
|
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
|
|
* documentation and/or other materials provided with the distribution.
|
|
|
|
* 3. Neither the names of the copyright holders nor the names of its
|
|
|
|
* contributors may be used to endorse or promote products derived from
|
|
|
|
* this software without specific prior written permission.
|
|
|
|
*
|
|
|
|
* Alternatively, this software may be distributed under the terms of the
|
|
|
|
* GNU General Public License ("GPL") version 2 as published by the Free
|
|
|
|
* Software Foundation.
|
|
|
|
*
|
|
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
|
|
|
|
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/if_infiniband.h>
|
|
|
|
#include "core.h"
|
|
|
|
#include "bearer.h"
|
|
|
|
|
2013-10-17 23:23:17 -06:00
|
|
|
#define MAX_IB_MEDIA MAX_BEARERS
|
2013-04-17 00:18:28 -06:00
|
|
|
|
|
|
|
/**
|
2013-10-17 23:23:17 -06:00
|
|
|
* struct ib_media - Infiniband media data structure
|
2013-04-17 00:18:28 -06:00
|
|
|
* @bearer: ptr to associated "generic" bearer structure
|
|
|
|
* @dev: ptr to associated Infiniband network device
|
|
|
|
* @tipc_packet_type: used in binding TIPC to Infiniband driver
|
|
|
|
* @cleanup: work item used when disabling bearer
|
|
|
|
*/
|
|
|
|
|
2013-10-17 23:23:17 -06:00
|
|
|
struct ib_media {
|
2013-04-17 00:18:28 -06:00
|
|
|
struct tipc_bearer *bearer;
|
|
|
|
struct net_device *dev;
|
|
|
|
struct packet_type tipc_packet_type;
|
|
|
|
struct work_struct setup;
|
|
|
|
struct work_struct cleanup;
|
|
|
|
};
|
|
|
|
|
|
|
|
static struct tipc_media ib_media_info;
|
2013-10-17 23:23:17 -06:00
|
|
|
static struct ib_media ib_media_array[MAX_IB_MEDIA];
|
2013-04-17 00:18:28 -06:00
|
|
|
static int ib_started;
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ib_media_addr_set - initialize Infiniband media address structure
|
|
|
|
*
|
|
|
|
* Media-dependent "value" field stores MAC address in first 6 bytes
|
|
|
|
* and zeroes out the remaining bytes.
|
|
|
|
*/
|
|
|
|
static void ib_media_addr_set(const struct tipc_bearer *tb_ptr,
|
|
|
|
struct tipc_media_addr *a, char *mac)
|
|
|
|
{
|
|
|
|
BUILD_BUG_ON(sizeof(a->value) < INFINIBAND_ALEN);
|
|
|
|
memcpy(a->value, mac, INFINIBAND_ALEN);
|
|
|
|
a->media_id = TIPC_MEDIA_TYPE_IB;
|
|
|
|
a->broadcast = !memcmp(mac, tb_ptr->bcast_addr.value, INFINIBAND_ALEN);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* send_msg - send a TIPC message out over an InfiniBand interface
|
|
|
|
*/
|
|
|
|
static int send_msg(struct sk_buff *buf, struct tipc_bearer *tb_ptr,
|
|
|
|
struct tipc_media_addr *dest)
|
|
|
|
{
|
|
|
|
struct sk_buff *clone;
|
|
|
|
struct net_device *dev;
|
|
|
|
int delta;
|
|
|
|
|
|
|
|
clone = skb_clone(buf, GFP_ATOMIC);
|
|
|
|
if (!clone)
|
|
|
|
return 0;
|
|
|
|
|
2013-10-17 23:23:17 -06:00
|
|
|
dev = ((struct ib_media *)(tb_ptr->usr_handle))->dev;
|
2013-04-17 00:18:28 -06:00
|
|
|
delta = dev->hard_header_len - skb_headroom(buf);
|
|
|
|
|
|
|
|
if ((delta > 0) &&
|
|
|
|
pskb_expand_head(clone, SKB_DATA_ALIGN(delta), 0, GFP_ATOMIC)) {
|
|
|
|
kfree_skb(clone);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
skb_reset_network_header(clone);
|
|
|
|
clone->dev = dev;
|
|
|
|
clone->protocol = htons(ETH_P_TIPC);
|
|
|
|
dev_hard_header(clone, dev, ETH_P_TIPC, dest->value,
|
|
|
|
dev->dev_addr, clone->len);
|
|
|
|
dev_queue_xmit(clone);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* recv_msg - handle incoming TIPC message from an InfiniBand interface
|
|
|
|
*
|
|
|
|
* Accept only packets explicitly sent to this node, or broadcast packets;
|
|
|
|
* ignores packets sent using InfiniBand multicast, and traffic sent to other
|
|
|
|
* nodes (which can happen if interface is running in promiscuous mode).
|
|
|
|
*/
|
|
|
|
static int recv_msg(struct sk_buff *buf, struct net_device *dev,
|
|
|
|
struct packet_type *pt, struct net_device *orig_dev)
|
|
|
|
{
|
2013-10-17 23:23:17 -06:00
|
|
|
struct ib_media *ib_ptr = (struct ib_media *)pt->af_packet_priv;
|
2013-04-17 00:18:28 -06:00
|
|
|
|
|
|
|
if (!net_eq(dev_net(dev), &init_net)) {
|
|
|
|
kfree_skb(buf);
|
2013-10-17 23:23:19 -06:00
|
|
|
return NET_RX_DROP;
|
2013-04-17 00:18:28 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
if (likely(ib_ptr->bearer)) {
|
|
|
|
if (likely(buf->pkt_type <= PACKET_BROADCAST)) {
|
|
|
|
buf->next = NULL;
|
|
|
|
tipc_recv_msg(buf, ib_ptr->bearer);
|
2013-10-17 23:23:19 -06:00
|
|
|
return NET_RX_SUCCESS;
|
2013-04-17 00:18:28 -06:00
|
|
|
}
|
|
|
|
}
|
|
|
|
kfree_skb(buf);
|
2013-10-17 23:23:19 -06:00
|
|
|
return NET_RX_DROP;
|
2013-04-17 00:18:28 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* setup_bearer - setup association between InfiniBand bearer and interface
|
|
|
|
*/
|
2013-10-17 23:23:17 -06:00
|
|
|
static void setup_media(struct work_struct *work)
|
2013-04-17 00:18:28 -06:00
|
|
|
{
|
2013-10-17 23:23:17 -06:00
|
|
|
struct ib_media *ib_ptr =
|
|
|
|
container_of(work, struct ib_media, setup);
|
2013-04-17 00:18:28 -06:00
|
|
|
|
|
|
|
dev_add_pack(&ib_ptr->tipc_packet_type);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
2013-10-17 23:23:17 -06:00
|
|
|
* enable_media - attach TIPC bearer to an InfiniBand interface
|
2013-04-17 00:18:28 -06:00
|
|
|
*/
|
2013-10-17 23:23:17 -06:00
|
|
|
static int enable_media(struct tipc_bearer *tb_ptr)
|
2013-04-17 00:18:28 -06:00
|
|
|
{
|
2013-06-17 08:54:51 -06:00
|
|
|
struct net_device *dev;
|
2013-10-17 23:23:17 -06:00
|
|
|
struct ib_media *ib_ptr = &ib_media_array[0];
|
|
|
|
struct ib_media *stop = &ib_media_array[MAX_IB_MEDIA];
|
2013-04-17 00:18:28 -06:00
|
|
|
char *driver_name = strchr((const char *)tb_ptr->name, ':') + 1;
|
|
|
|
int pending_dev = 0;
|
|
|
|
|
|
|
|
/* Find unused InfiniBand bearer structure */
|
|
|
|
while (ib_ptr->dev) {
|
|
|
|
if (!ib_ptr->bearer)
|
|
|
|
pending_dev++;
|
|
|
|
if (++ib_ptr == stop)
|
|
|
|
return pending_dev ? -EAGAIN : -EDQUOT;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Find device with specified name */
|
2013-06-17 08:54:51 -06:00
|
|
|
dev = dev_get_by_name(&init_net, driver_name);
|
2013-04-17 00:18:28 -06:00
|
|
|
if (!dev)
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
/* Create InfiniBand bearer for device */
|
|
|
|
ib_ptr->dev = dev;
|
|
|
|
ib_ptr->tipc_packet_type.type = htons(ETH_P_TIPC);
|
|
|
|
ib_ptr->tipc_packet_type.dev = dev;
|
|
|
|
ib_ptr->tipc_packet_type.func = recv_msg;
|
|
|
|
ib_ptr->tipc_packet_type.af_packet_priv = ib_ptr;
|
|
|
|
INIT_LIST_HEAD(&(ib_ptr->tipc_packet_type.list));
|
2013-10-17 23:23:17 -06:00
|
|
|
INIT_WORK(&ib_ptr->setup, setup_media);
|
2013-04-17 00:18:28 -06:00
|
|
|
schedule_work(&ib_ptr->setup);
|
|
|
|
|
|
|
|
/* Associate TIPC bearer with InfiniBand bearer */
|
|
|
|
ib_ptr->bearer = tb_ptr;
|
|
|
|
tb_ptr->usr_handle = (void *)ib_ptr;
|
|
|
|
memset(tb_ptr->bcast_addr.value, 0, sizeof(tb_ptr->bcast_addr.value));
|
|
|
|
memcpy(tb_ptr->bcast_addr.value, dev->broadcast, INFINIBAND_ALEN);
|
|
|
|
tb_ptr->bcast_addr.media_id = TIPC_MEDIA_TYPE_IB;
|
|
|
|
tb_ptr->bcast_addr.broadcast = 1;
|
|
|
|
tb_ptr->mtu = dev->mtu;
|
|
|
|
ib_media_addr_set(tb_ptr, &tb_ptr->addr, (char *)dev->dev_addr);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* cleanup_bearer - break association between InfiniBand bearer and interface
|
|
|
|
*
|
|
|
|
* This routine must be invoked from a work queue because it can sleep.
|
|
|
|
*/
|
|
|
|
static void cleanup_bearer(struct work_struct *work)
|
|
|
|
{
|
2013-10-17 23:23:17 -06:00
|
|
|
struct ib_media *ib_ptr =
|
|
|
|
container_of(work, struct ib_media, cleanup);
|
2013-04-17 00:18:28 -06:00
|
|
|
|
|
|
|
dev_remove_pack(&ib_ptr->tipc_packet_type);
|
|
|
|
dev_put(ib_ptr->dev);
|
|
|
|
ib_ptr->dev = NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
2013-10-17 23:23:17 -06:00
|
|
|
* disable_media - detach TIPC bearer from an InfiniBand interface
|
2013-04-17 00:18:28 -06:00
|
|
|
*
|
|
|
|
* Mark InfiniBand bearer as inactive so that incoming buffers are thrown away,
|
|
|
|
* then get worker thread to complete bearer cleanup. (Can't do cleanup
|
|
|
|
* here because cleanup code needs to sleep and caller holds spinlocks.)
|
|
|
|
*/
|
2013-10-17 23:23:17 -06:00
|
|
|
static void disable_media(struct tipc_bearer *tb_ptr)
|
2013-04-17 00:18:28 -06:00
|
|
|
{
|
2013-10-17 23:23:17 -06:00
|
|
|
struct ib_media *ib_ptr = (struct ib_media *)tb_ptr->usr_handle;
|
2013-04-17 00:18:28 -06:00
|
|
|
|
|
|
|
ib_ptr->bearer = NULL;
|
|
|
|
INIT_WORK(&ib_ptr->cleanup, cleanup_bearer);
|
|
|
|
schedule_work(&ib_ptr->cleanup);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* recv_notification - handle device updates from OS
|
|
|
|
*
|
|
|
|
* Change the state of the InfiniBand bearer (if any) associated with the
|
|
|
|
* specified device.
|
|
|
|
*/
|
|
|
|
static int recv_notification(struct notifier_block *nb, unsigned long evt,
|
2013-05-27 19:30:21 -06:00
|
|
|
void *ptr)
|
2013-04-17 00:18:28 -06:00
|
|
|
{
|
2013-05-27 19:30:21 -06:00
|
|
|
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
|
2013-10-17 23:23:17 -06:00
|
|
|
struct ib_media *ib_ptr = &ib_media_array[0];
|
|
|
|
struct ib_media *stop = &ib_media_array[MAX_IB_MEDIA];
|
2013-04-17 00:18:28 -06:00
|
|
|
|
|
|
|
if (!net_eq(dev_net(dev), &init_net))
|
|
|
|
return NOTIFY_DONE;
|
|
|
|
|
|
|
|
while ((ib_ptr->dev != dev)) {
|
|
|
|
if (++ib_ptr == stop)
|
|
|
|
return NOTIFY_DONE; /* couldn't find device */
|
|
|
|
}
|
|
|
|
if (!ib_ptr->bearer)
|
|
|
|
return NOTIFY_DONE; /* bearer had been disabled */
|
|
|
|
|
|
|
|
ib_ptr->bearer->mtu = dev->mtu;
|
|
|
|
|
|
|
|
switch (evt) {
|
|
|
|
case NETDEV_CHANGE:
|
|
|
|
if (netif_carrier_ok(dev))
|
tipc: remove interface state mirroring in bearer
struct 'tipc_bearer' is a generic representation of the underlying
media type, and exists in a one-to-one relationship to each interface
TIPC is using. The struct contains a 'blocked' flag that mirrors the
operational and execution state of the represented interface, and is
updated through notification calls from the latter. The users of
tipc_bearer are checking this flag before each attempt to send a
packet via the interface.
This state mirroring serves no purpose in the current code base. TIPC
links will not discover a media failure any faster through this
mechanism, and in reality the flag only adds overhead at packet
sending and reception.
Furthermore, the fact that the flag needs to be protected by a spinlock
aggregated into tipc_bearer has turned out to cause a serious and
completely unnecessary deadlock problem.
CPU0 CPU1
---- ----
Time 0: bearer_disable() link_timeout()
Time 1: spin_lock_bh(&b_ptr->lock) tipc_link_push_queue()
Time 2: tipc_link_delete() tipc_bearer_blocked(b_ptr)
Time 3: k_cancel_timer(&req->timer) spin_lock_bh(&b_ptr->lock)
Time 4: del_timer_sync(&req->timer)
I.e., del_timer_sync() on CPU0 never returns, because the timer handler
on CPU1 is waiting for the bearer lock.
We eliminate the 'blocked' flag from struct tipc_bearer, along with all
tests on this flag. This not only resolves the deadlock, but also
simplifies and speeds up the data path execution of TIPC. It also fits
well into our ongoing effort to make the locking policy simpler and
more manageable.
An effect of this change is that we can get rid of functions such as
tipc_bearer_blocked(), tipc_continue() and tipc_block_bearer().
We replace the latter with a new function, tipc_reset_bearer(), which
resets all links associated to the bearer immediately after an
interface goes down.
A user might notice one slight change in link behaviour after this
change. When an interface goes down, (e.g. through a NETDEV_DOWN
event) all attached links will be reset immediately, instead of
leaving it to each link to detect the failure through a timer-driven
mechanism. We consider this an improvement, and see no obvious risks
with the new behavior.
Signed-off-by: Erik Hugne <erik.hugne@ericsson.com>
Reviewed-by: Ying Xue <ying.xue@windriver.com>
Reviewed-by: Paul Gortmaker <Paul.Gortmaker@windriver.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-06 08:08:00 -07:00
|
|
|
break;
|
2013-04-17 00:18:28 -06:00
|
|
|
case NETDEV_DOWN:
|
|
|
|
case NETDEV_CHANGEMTU:
|
|
|
|
case NETDEV_CHANGEADDR:
|
tipc: remove interface state mirroring in bearer
struct 'tipc_bearer' is a generic representation of the underlying
media type, and exists in a one-to-one relationship to each interface
TIPC is using. The struct contains a 'blocked' flag that mirrors the
operational and execution state of the represented interface, and is
updated through notification calls from the latter. The users of
tipc_bearer are checking this flag before each attempt to send a
packet via the interface.
This state mirroring serves no purpose in the current code base. TIPC
links will not discover a media failure any faster through this
mechanism, and in reality the flag only adds overhead at packet
sending and reception.
Furthermore, the fact that the flag needs to be protected by a spinlock
aggregated into tipc_bearer has turned out to cause a serious and
completely unnecessary deadlock problem.
CPU0 CPU1
---- ----
Time 0: bearer_disable() link_timeout()
Time 1: spin_lock_bh(&b_ptr->lock) tipc_link_push_queue()
Time 2: tipc_link_delete() tipc_bearer_blocked(b_ptr)
Time 3: k_cancel_timer(&req->timer) spin_lock_bh(&b_ptr->lock)
Time 4: del_timer_sync(&req->timer)
I.e., del_timer_sync() on CPU0 never returns, because the timer handler
on CPU1 is waiting for the bearer lock.
We eliminate the 'blocked' flag from struct tipc_bearer, along with all
tests on this flag. This not only resolves the deadlock, but also
simplifies and speeds up the data path execution of TIPC. It also fits
well into our ongoing effort to make the locking policy simpler and
more manageable.
An effect of this change is that we can get rid of functions such as
tipc_bearer_blocked(), tipc_continue() and tipc_block_bearer().
We replace the latter with a new function, tipc_reset_bearer(), which
resets all links associated to the bearer immediately after an
interface goes down.
A user might notice one slight change in link behaviour after this
change. When an interface goes down, (e.g. through a NETDEV_DOWN
event) all attached links will be reset immediately, instead of
leaving it to each link to detect the failure through a timer-driven
mechanism. We consider this an improvement, and see no obvious risks
with the new behavior.
Signed-off-by: Erik Hugne <erik.hugne@ericsson.com>
Reviewed-by: Ying Xue <ying.xue@windriver.com>
Reviewed-by: Paul Gortmaker <Paul.Gortmaker@windriver.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-06 08:08:00 -07:00
|
|
|
tipc_reset_bearer(ib_ptr->bearer);
|
2013-04-17 00:18:28 -06:00
|
|
|
break;
|
|
|
|
case NETDEV_UNREGISTER:
|
|
|
|
case NETDEV_CHANGENAME:
|
|
|
|
tipc_disable_bearer(ib_ptr->bearer->name);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
return NOTIFY_OK;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct notifier_block notifier = {
|
|
|
|
.notifier_call = recv_notification,
|
|
|
|
.priority = 0,
|
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ib_addr2str - convert InfiniBand address to string
|
|
|
|
*/
|
|
|
|
static int ib_addr2str(struct tipc_media_addr *a, char *str_buf, int str_size)
|
|
|
|
{
|
|
|
|
if (str_size < 60) /* 60 = 19 * strlen("xx:") + strlen("xx\0") */
|
|
|
|
return 1;
|
|
|
|
|
2013-07-10 08:30:34 -06:00
|
|
|
sprintf(str_buf, "%20phC", a->value);
|
2013-04-17 00:18:28 -06:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ib_addr2msg - convert InfiniBand address format to message header format
|
|
|
|
*/
|
|
|
|
static int ib_addr2msg(struct tipc_media_addr *a, char *msg_area)
|
|
|
|
{
|
|
|
|
memset(msg_area, 0, TIPC_MEDIA_ADDR_SIZE);
|
|
|
|
msg_area[TIPC_MEDIA_TYPE_OFFSET] = TIPC_MEDIA_TYPE_IB;
|
|
|
|
memcpy(msg_area, a->value, INFINIBAND_ALEN);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ib_msg2addr - convert message header address format to InfiniBand format
|
|
|
|
*/
|
|
|
|
static int ib_msg2addr(const struct tipc_bearer *tb_ptr,
|
|
|
|
struct tipc_media_addr *a, char *msg_area)
|
|
|
|
{
|
|
|
|
ib_media_addr_set(tb_ptr, a, msg_area);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* InfiniBand media registration info
|
|
|
|
*/
|
|
|
|
static struct tipc_media ib_media_info = {
|
|
|
|
.send_msg = send_msg,
|
2013-10-17 23:23:17 -06:00
|
|
|
.enable_media = enable_media,
|
|
|
|
.disable_media = disable_media,
|
2013-04-17 00:18:28 -06:00
|
|
|
.addr2str = ib_addr2str,
|
|
|
|
.addr2msg = ib_addr2msg,
|
|
|
|
.msg2addr = ib_msg2addr,
|
|
|
|
.priority = TIPC_DEF_LINK_PRI,
|
|
|
|
.tolerance = TIPC_DEF_LINK_TOL,
|
|
|
|
.window = TIPC_DEF_LINK_WIN,
|
|
|
|
.type_id = TIPC_MEDIA_TYPE_IB,
|
|
|
|
.name = "ib"
|
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
|
|
* tipc_ib_media_start - activate InfiniBand bearer support
|
|
|
|
*
|
|
|
|
* Register InfiniBand media type with TIPC bearer code. Also register
|
|
|
|
* with OS for notifications about device state changes.
|
|
|
|
*/
|
|
|
|
int tipc_ib_media_start(void)
|
|
|
|
{
|
|
|
|
int res;
|
|
|
|
|
|
|
|
if (ib_started)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
res = tipc_register_media(&ib_media_info);
|
|
|
|
if (res)
|
|
|
|
return res;
|
|
|
|
|
|
|
|
res = register_netdevice_notifier(¬ifier);
|
|
|
|
if (!res)
|
|
|
|
ib_started = 1;
|
|
|
|
return res;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* tipc_ib_media_stop - deactivate InfiniBand bearer support
|
|
|
|
*/
|
|
|
|
void tipc_ib_media_stop(void)
|
|
|
|
{
|
|
|
|
if (!ib_started)
|
|
|
|
return;
|
|
|
|
|
|
|
|
flush_scheduled_work();
|
|
|
|
unregister_netdevice_notifier(¬ifier);
|
|
|
|
ib_started = 0;
|
|
|
|
}
|