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IB/cma: Separate port allocation to network namespaces 

Keep a struct for each network namespace containing the IDRs for the RDMA
CM port spaces. The struct is created dynamically using the generic_net
mechanism.

This patch is internal infrastructure work for the following patches. In
this patch, init_net is statically used as the network namespace for
the new port-space API.

Signed-off-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Yotam Kenneth <yotamke@mellanox.com>
Signed-off-by: Shachar Raindel <raindel@mellanox.com>
Signed-off-by: Guy Shapiro <guysh@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Haggai Eran 2015-10-22 15:20:09 +03:00 committed by Doug Ledford
parent 565edd1d55
commit 4be74b42a6
1 changed files with 70 additions and 24 deletions
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94
drivers/infiniband/core/cma.c
View File

@ -44,6 +44,8 @@
#include <linux/module.h>
#include <net/route.h>
#include <net/net_namespace.h>
#include <net/netns/generic.h>
#include <net/tcp.h>
#include <net/ipv6.h>
#include <net/ip_fib.h>
@ -110,22 +112,33 @@ static LIST_HEAD(dev_list);
static LIST_HEAD(listen_any_list);
static DEFINE_MUTEX(lock);
static struct workqueue_struct *cma_wq;
static DEFINE_IDR(tcp_ps);
static DEFINE_IDR(udp_ps);
static DEFINE_IDR(ipoib_ps);
static DEFINE_IDR(ib_ps);
static int cma_pernet_id;
static struct idr *cma_idr(enum rdma_port_space ps)
struct cma_pernet {
struct idr tcp_ps;
struct idr udp_ps;
struct idr ipoib_ps;
struct idr ib_ps;
};
static struct cma_pernet *cma_pernet(struct net *net)
{
return net_generic(net, cma_pernet_id);
}
static struct idr *cma_pernet_idr(struct net *net, enum rdma_port_space ps)
{
struct cma_pernet *pernet = cma_pernet(net);
switch (ps) {
case RDMA_PS_TCP:
return &tcp_ps;
return &pernet->tcp_ps;
case RDMA_PS_UDP:
return &udp_ps;
return &pernet->udp_ps;
case RDMA_PS_IPOIB:
return &ipoib_ps;
return &pernet->ipoib_ps;
case RDMA_PS_IB:
return &ib_ps;
return &pernet->ib_ps;
default:
return NULL;
}
@ -145,24 +158,25 @@ struct rdma_bind_list {
unsigned short port;
};
static int cma_ps_alloc(enum rdma_port_space ps,
static int cma_ps_alloc(struct net *net, enum rdma_port_space ps,
struct rdma_bind_list *bind_list, int snum)
{
struct idr *idr = cma_idr(ps);
struct idr *idr = cma_pernet_idr(net, ps);
return idr_alloc(idr, bind_list, snum, snum + 1, GFP_KERNEL);
}
static struct rdma_bind_list *cma_ps_find(enum rdma_port_space ps, int snum)
static struct rdma_bind_list *cma_ps_find(struct net *net,
enum rdma_port_space ps, int snum)
{
struct idr *idr = cma_idr(ps);
struct idr *idr = cma_pernet_idr(net, ps);
return idr_find(idr, snum);
}
static void cma_ps_remove(enum rdma_port_space ps, int snum)
static void cma_ps_remove(struct net *net, enum rdma_port_space ps, int snum)
{
struct idr *idr = cma_idr(ps);
struct idr *idr = cma_pernet_idr(net, ps);
idr_remove(idr, snum);
}
@ -1325,7 +1339,8 @@ static struct rdma_id_private *cma_id_from_event(struct ib_cm_id *cm_id,
}
}
bind_list = cma_ps_find(rdma_ps_from_service_id(req.service_id),
bind_list = cma_ps_find(&init_net,
rdma_ps_from_service_id(req.service_id),
cma_port_from_service_id(req.service_id));
id_priv = cma_find_listener(bind_list, cm_id, ib_event, &req, *net_dev);
if (IS_ERR(id_priv) && *net_dev) {
@ -1403,7 +1418,7 @@ static void cma_release_port(struct rdma_id_private *id_priv)
mutex_lock(&lock);
hlist_del(&id_priv->node);
if (hlist_empty(&bind_list->owners)) {
cma_ps_remove(bind_list->ps, bind_list->port);
cma_ps_remove(&init_net, bind_list->ps, bind_list->port);
kfree(bind_list);
}
mutex_unlock(&lock);
@ -2693,7 +2708,7 @@ static int cma_alloc_port(enum rdma_port_space ps,
if (!bind_list)
return -ENOMEM;
ret = cma_ps_alloc(ps, bind_list, snum);
ret = cma_ps_alloc(&init_net, ps, bind_list, snum);
if (ret < 0)
goto err;
@ -2718,7 +2733,7 @@ static int cma_alloc_any_port(enum rdma_port_space ps,
rover = prandom_u32() % remaining + low;
retry:
if (last_used_port != rover &&
!cma_ps_find(ps, (unsigned short)rover)) {
!cma_ps_find(&init_net, ps, (unsigned short)rover)) {
int ret = cma_alloc_port(ps, id_priv, rover);
/*
* Remember previously used port number in order to avoid
@ -2784,7 +2799,7 @@ static int cma_use_port(enum rdma_port_space ps,
if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
return -EACCES;
bind_list = cma_ps_find(ps, snum);
bind_list = cma_ps_find(&init_net, ps, snum);
if (!bind_list) {
ret = cma_alloc_port(ps, id_priv, snum);
} else {
@ -4004,6 +4019,35 @@ static const struct ibnl_client_cbs cma_cb_table[] = {
.module = THIS_MODULE },
};
static int cma_init_net(struct net *net)
{
struct cma_pernet *pernet = cma_pernet(net);
idr_init(&pernet->tcp_ps);
idr_init(&pernet->udp_ps);
idr_init(&pernet->ipoib_ps);
idr_init(&pernet->ib_ps);
return 0;
}
static void cma_exit_net(struct net *net)
{
struct cma_pernet *pernet = cma_pernet(net);
idr_destroy(&pernet->tcp_ps);
idr_destroy(&pernet->udp_ps);
idr_destroy(&pernet->ipoib_ps);
idr_destroy(&pernet->ib_ps);
}
static struct pernet_operations cma_pernet_operations = {
.init = cma_init_net,
.exit = cma_exit_net,
.id = &cma_pernet_id,
.size = sizeof(struct cma_pernet),
};
static int __init cma_init(void)
{
int ret;
@ -4012,6 +4056,10 @@ static int __init cma_init(void)
if (!cma_wq)
return -ENOMEM;
ret = register_pernet_subsys(&cma_pernet_operations);
if (ret)
goto err_wq;
ib_sa_register_client(&sa_client);
rdma_addr_register_client(&addr_client);
register_netdevice_notifier(&cma_nb);
@ -4029,6 +4077,7 @@ static int __init cma_init(void)
unregister_netdevice_notifier(&cma_nb);
rdma_addr_unregister_client(&addr_client);
ib_sa_unregister_client(&sa_client);
err_wq:
destroy_workqueue(cma_wq);
return ret;
}
@ -4040,11 +4089,8 @@ static void __exit cma_cleanup(void)
unregister_netdevice_notifier(&cma_nb);
rdma_addr_unregister_client(&addr_client);
ib_sa_unregister_client(&sa_client);
unregister_pernet_subsys(&cma_pernet_operations);
destroy_workqueue(cma_wq);
idr_destroy(&tcp_ps);
idr_destroy(&udp_ps);
idr_destroy(&ipoib_ps);
idr_destroy(&ib_ps);
}
module_init(cma_init);