From: Parav Pandit <parav@xxxxxxxxxxxx>
Now that IB core supports RDMA device binding with specific net
namespace, enable IB core to accept netlink commands in non init_net
namespaces.
This is done by having per net namespace netlink socket.
At present only netlink device handling client RDMA_NL_NLDEV supports
device handling in multiple net namespaces.
Hence do not accept netlink messages for other clients in non init_net
net namespaces.
Signed-off-by: Parav Pandit <parav@xxxxxxxxxxxx>
Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxxxx>
---
drivers/infiniband/core/addr.c | 2 +-
drivers/infiniband/core/core_priv.h | 19 +++++++++--
drivers/infiniband/core/device.c | 34 ++++++------------
drivers/infiniband/core/iwpm_msg.c | 8 ++---
drivers/infiniband/core/iwpm_util.c | 6 ++--
drivers/infiniband/core/netlink.c | 53 ++++++++++++++++++-----------
drivers/infiniband/core/nldev.c | 20 +++++------
drivers/infiniband/core/sa_query.c | 2 +-
include/rdma/rdma_netlink.h | 10 ++++--
9 files changed, 86 insertions(+), 68 deletions(-)
diff --git a/drivers/infiniband/core/addr.c b/drivers/infiniband/core/addr.c
index 2f7d14159841..9be0400a9a51 100644
--- a/drivers/infiniband/core/addr.c
+++ b/drivers/infiniband/core/addr.c
@@ -183,7 +183,7 @@ static int ib_nl_ip_send_msg(struct rdma_dev_addr *dev_addr,
/* Repair the nlmsg header length */
nlmsg_end(skb, nlh);
- rdma_nl_multicast(skb, RDMA_NL_GROUP_LS, GFP_KERNEL);
+ rdma_nl_multicast(&init_net, skb, RDMA_NL_GROUP_LS, GFP_KERNEL);
/* Make the request retry, so when we get the response from userspace
* we will have something.
diff --git a/drivers/infiniband/core/core_priv.h b/drivers/infiniband/core/core_priv.h
index 888d89ce81df..b441a31fd731 100644
--- a/drivers/infiniband/core/core_priv.h
+++ b/drivers/infiniband/core/core_priv.h
@@ -54,8 +54,21 @@ struct pkey_index_qp_list {
struct list_head qp_list;
};
+/**
+ * struct rdma_dev_net - rdma net namespace metadata for a net
+ * @nl_sock: Pointer to netlink socket
+ * @net: Pointer to owner net namespace
+ * @id: xarray id to identify the net namespace.
+ */
+struct rdma_dev_net {
+ struct sock *nl_sock;
+ possible_net_t net;
+ u32 id;
+};
+
extern const struct attribute_group ib_dev_attr_group;
extern bool ib_devices_shared_netns;
+extern unsigned int rdma_dev_net_id;
int ib_device_register_sysfs(struct ib_device *device);
void ib_device_unregister_sysfs(struct ib_device *device);
@@ -179,9 +192,6 @@ void ib_mad_cleanup(void);
int ib_sa_init(void);
void ib_sa_cleanup(void);
-int rdma_nl_init(void);
-void rdma_nl_exit(void);
-
int ib_nl_handle_resolve_resp(struct sk_buff *skb,
struct nlmsghdr *nlh,
struct netlink_ext_ack *extack);
@@ -362,4 +372,7 @@ void ib_port_unregister_module_stat(struct kobject *kobj);
int ib_device_set_netns_put(struct sk_buff *skb,
struct ib_device *dev, u32 ns_fd);
+
+int rdma_nl_net_init(struct rdma_dev_net *rnet);
+void rdma_nl_net_exit(struct rdma_dev_net *rnet);
#endif /* _CORE_PRIV_H */
diff --git a/drivers/infiniband/core/device.c b/drivers/infiniband/core/device.c
index adf8d93bb42d..b404a8dfea89 100644
--- a/drivers/infiniband/core/device.c
+++ b/drivers/infiniband/core/device.c
@@ -105,17 +105,7 @@ static DECLARE_RWSEM(clients_rwsem);
*/
#define CLIENT_DATA_REGISTERED XA_MARK_1
-/**
- * struct rdma_dev_net - rdma net namespace metadata for a net
- * @net: Pointer to owner net namespace
- * @id: xarray id to identify the net namespace.
- */
-struct rdma_dev_net {
- possible_net_t net;
- u32 id;
-};
-
-static unsigned int rdma_dev_net_id;
+unsigned int rdma_dev_net_id;
/*
* A list of net namespaces is maintained in an xarray. This is necessary
@@ -1084,6 +1074,7 @@ static void rdma_dev_exit_net(struct net *net)
}
up_read(&devices_rwsem);
+ rdma_nl_net_exit(rnet);
xa_erase(&rdma_nets, rnet->id);
}
@@ -1094,15 +1085,21 @@ static __net_init int rdma_dev_init_net(struct net *net)
struct ib_device *dev;
int ret;
+ write_pnet(&rnet->net, net);
+
+ ret = rdma_nl_net_init(rnet);
+ if (ret)
+ return ret;
+
/* No need to create any compat devices in default init_net. */
if (net_eq(net, &init_net))
return 0;
- write_pnet(&rnet->net, net);
-
ret = xa_alloc(&rdma_nets, &rnet->id, rnet, xa_limit_32b, GFP_KERNEL);
- if (ret)
+ if (ret) {
+ rdma_nl_net_exit(rnet);
return ret;
+ }
down_read(&devices_rwsem);
xa_for_each_marked (&devices, index, dev, DEVICE_REGISTERED) {
@@ -2629,12 +2626,6 @@ static int __init ib_core_init(void)
goto err_comp_unbound;
}
- ret = rdma_nl_init();
- if (ret) {
- pr_warn("Couldn't init IB netlink interface: err %d\n", ret);
- goto err_sysfs;
- }
-
ret = addr_init();
if (ret) {
pr_warn("Could't init IB address resolution\n");
@@ -2680,8 +2671,6 @@ static int __init ib_core_init(void)
err_addr:
addr_cleanup();
err_ibnl:
- rdma_nl_exit();
-err_sysfs:
class_unregister(&ib_class);
err_comp_unbound:
destroy_workqueue(ib_comp_unbound_wq);
@@ -2702,7 +2691,6 @@ static void __exit ib_core_cleanup(void)
ib_sa_cleanup();
ib_mad_cleanup();
addr_cleanup();
- rdma_nl_exit();
class_unregister(&ib_class);
destroy_workqueue(ib_comp_unbound_wq);
destroy_workqueue(ib_comp_wq);
diff --git a/drivers/infiniband/core/iwpm_msg.c b/drivers/infiniband/core/iwpm_msg.c
index 2452b0ddcf0d..f1a873d4e842 100644
--- a/drivers/infiniband/core/iwpm_msg.c
+++ b/drivers/infiniband/core/iwpm_msg.c
@@ -112,7 +112,7 @@ int iwpm_register_pid(struct iwpm_dev_data *pm_msg, u8 nl_client)
pr_debug("%s: Multicasting a nlmsg (dev = %s ifname = %s iwpm = %s)\n",
__func__, pm_msg->dev_name, pm_msg->if_name, iwpm_ulib_name);
- ret = rdma_nl_multicast(skb, RDMA_NL_GROUP_IWPM, GFP_KERNEL);
+ ret = rdma_nl_multicast(&init_net, skb, RDMA_NL_GROUP_IWPM, GFP_KERNEL);
if (ret) {
skb = NULL; /* skb is freed in the netlink send-op handling */
iwpm_user_pid = IWPM_PID_UNAVAILABLE;
@@ -202,7 +202,7 @@ int iwpm_add_mapping(struct iwpm_sa_data *pm_msg, u8 nl_client)
nlmsg_end(skb, nlh);
nlmsg_request->req_buffer = pm_msg;
- ret = rdma_nl_unicast_wait(skb, iwpm_user_pid);
+ ret = rdma_nl_unicast_wait(&init_net, skb, iwpm_user_pid);
if (ret) {
skb = NULL; /* skb is freed in the netlink send-op handling */
iwpm_user_pid = IWPM_PID_UNDEFINED;
@@ -297,7 +297,7 @@ int iwpm_add_and_query_mapping(struct iwpm_sa_data *pm_msg, u8 nl_client)
nlmsg_end(skb, nlh);
nlmsg_request->req_buffer = pm_msg;
- ret = rdma_nl_unicast_wait(skb, iwpm_user_pid);
+ ret = rdma_nl_unicast_wait(&init_net, skb, iwpm_user_pid);
if (ret) {
skb = NULL; /* skb is freed in the netlink send-op handling */
err_str = "Unable to send a nlmsg";
@@ -364,7 +364,7 @@ int iwpm_remove_mapping(struct sockaddr_storage *local_addr, u8 nl_client)
nlmsg_end(skb, nlh);
- ret = rdma_nl_unicast_wait(skb, iwpm_user_pid);
+ ret = rdma_nl_unicast_wait(&init_net, skb, iwpm_user_pid);
if (ret) {
skb = NULL; /* skb is freed in the netlink send-op handling */
iwpm_user_pid = IWPM_PID_UNDEFINED;
diff --git a/drivers/infiniband/core/iwpm_util.c b/drivers/infiniband/core/iwpm_util.c
index 41929bb83739..c7ad3499228c 100644
--- a/drivers/infiniband/core/iwpm_util.c
+++ b/drivers/infiniband/core/iwpm_util.c
@@ -645,7 +645,7 @@ static int send_mapinfo_num(u32 mapping_num, u8 nl_client, int iwpm_pid)
nlmsg_end(skb, nlh);
- ret = rdma_nl_unicast(skb, iwpm_pid);
+ ret = rdma_nl_unicast(&init_net, skb, iwpm_pid);
if (ret) {
skb = NULL;
err_str = "Unable to send a nlmsg";
@@ -674,7 +674,7 @@ static int send_nlmsg_done(struct sk_buff *skb, u8 nl_client, int iwpm_pid)
return -ENOMEM;
}
nlh->nlmsg_type = NLMSG_DONE;
- ret = rdma_nl_unicast(skb, iwpm_pid);
+ ret = rdma_nl_unicast(&init_net, skb, iwpm_pid);
if (ret)
pr_warn("%s Unable to send a nlmsg\n", __func__);
return ret;
@@ -824,7 +824,7 @@ int iwpm_send_hello(u8 nl_client, int iwpm_pid, u16 abi_version)
goto hello_num_error;
nlmsg_end(skb, nlh);
- ret = rdma_nl_unicast(skb, iwpm_pid);
+ ret = rdma_nl_unicast(&init_net, skb, iwpm_pid);
if (ret) {
skb = NULL;
err_str = "Unable to send a nlmsg";
diff --git a/drivers/infiniband/core/netlink.c b/drivers/infiniband/core/netlink.c
index eecfc0b377c9..676db08e7b4e 100644
--- a/drivers/infiniband/core/netlink.c
+++ b/drivers/infiniband/core/netlink.c
@@ -36,20 +36,22 @@
#include <linux/export.h>
#include <net/netlink.h>
#include <net/net_namespace.h>
+#include <net/netns/generic.h>
#include <net/sock.h>
#include <rdma/rdma_netlink.h>
#include <linux/module.h>
#include "core_priv.h"
static DEFINE_MUTEX(rdma_nl_mutex);
-static struct sock *nls;
static struct {
const struct rdma_nl_cbs *cb_table;
} rdma_nl_types[RDMA_NL_NUM_CLIENTS];
bool rdma_nl_chk_listeners(unsigned int group)
{
- return netlink_has_listeners(nls, group);
+ struct rdma_dev_net *rnet = net_generic(&init_net, rdma_dev_net_id);
+
+ return netlink_has_listeners(rnet->nl_sock, group);
}
EXPORT_SYMBOL(rdma_nl_chk_listeners);
@@ -73,13 +75,21 @@ static bool is_nl_msg_valid(unsigned int type, unsigned int op)
return (op < max_num_ops[type]) ? true : false;
}
-static bool is_nl_valid(unsigned int type, unsigned int op)
+static bool
+is_nl_valid(const struct sk_buff *skb, unsigned int type, unsigned int op)
{
const struct rdma_nl_cbs *cb_table;
if (!is_nl_msg_valid(type, op))
return false;
+ /*
+ * Currently only NLDEV client is supporting netlink commands in
+ * non init_net net namespace.
+ */
+ if (sock_net(skb->sk) != &init_net && type != RDMA_NL_NLDEV)
+ return false;
+
if (!rdma_nl_types[type].cb_table) {
mutex_unlock(&rdma_nl_mutex);
request_module("rdma-netlink-subsys-%d", type);
@@ -161,7 +171,7 @@ static int rdma_nl_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
unsigned int op = RDMA_NL_GET_OP(type);
const struct rdma_nl_cbs *cb_table;
- if (!is_nl_valid(index, op))
+ if (!is_nl_valid(skb, index, op))
return -EINVAL;
cb_table = rdma_nl_types[index].cb_table;
@@ -185,7 +195,7 @@ static int rdma_nl_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
.dump = cb_table[op].dump,
};
if (c.dump)
- return netlink_dump_start(nls, skb, nlh, &c);
+ return netlink_dump_start(skb->sk, skb, nlh, &c);
return -EINVAL;
}
@@ -258,52 +268,55 @@ static void rdma_nl_rcv(struct sk_buff *skb)
mutex_unlock(&rdma_nl_mutex);
}
-int rdma_nl_unicast(struct sk_buff *skb, u32 pid)
+int rdma_nl_unicast(struct net *net, struct sk_buff *skb, u32 pid)
{
+ struct rdma_dev_net *rnet = net_generic(net, rdma_dev_net_id);
int err;
- err = netlink_unicast(nls, skb, pid, MSG_DONTWAIT);
+ err = netlink_unicast(rnet->nl_sock, skb, pid, MSG_DONTWAIT);
return (err < 0) ? err : 0;
}
EXPORT_SYMBOL(rdma_nl_unicast);
-int rdma_nl_unicast_wait(struct sk_buff *skb, __u32 pid)
+int rdma_nl_unicast_wait(struct net *net, struct sk_buff *skb, __u32 pid)
{
+ struct rdma_dev_net *rnet = net_generic(net, rdma_dev_net_id);
int err;
- err = netlink_unicast(nls, skb, pid, 0);
+ err = netlink_unicast(rnet->nl_sock, skb, pid, 0);
return (err < 0) ? err : 0;
}
EXPORT_SYMBOL(rdma_nl_unicast_wait);
-int rdma_nl_multicast(struct sk_buff *skb, unsigned int group, gfp_t flags)
+int rdma_nl_multicast(struct net *net, struct sk_buff *skb,
+ unsigned int group, gfp_t flags)
{
- return nlmsg_multicast(nls, skb, 0, group, flags);
+ struct rdma_dev_net *rnet = net_generic(net, rdma_dev_net_id);
+
+ return nlmsg_multicast(rnet->nl_sock, skb, 0, group, flags);
}
EXPORT_SYMBOL(rdma_nl_multicast);
-int __init rdma_nl_init(void)
+int rdma_nl_net_init(struct rdma_dev_net *rnet)
{
+ struct net *net = read_pnet(&rnet->net);
struct netlink_kernel_cfg cfg = {
.input = rdma_nl_rcv,
};
+ struct sock *nls;
- nls = netlink_kernel_create(&init_net, NETLINK_RDMA, &cfg);
+ nls = netlink_kernel_create(net, NETLINK_RDMA, &cfg);
if (!nls)
return -ENOMEM;
nls->sk_sndtimeo = 10 * HZ;
+ rnet->nl_sock = nls;
return 0;
}
-void rdma_nl_exit(void)
+void rdma_nl_net_exit(struct rdma_dev_net *rnet)
{
- int idx;
-
- for (idx = 0; idx < RDMA_NL_NUM_CLIENTS; idx++)
- rdma_nl_unregister(idx);
-
- netlink_kernel_release(nls);
+ netlink_kernel_release(rnet->nl_sock);
}
MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_RDMA);
diff --git a/drivers/infiniband/core/nldev.c b/drivers/infiniband/core/nldev.c
index 783e465e7c41..e287b71a1cfd 100644
--- a/drivers/infiniband/core/nldev.c
+++ b/drivers/infiniband/core/nldev.c
@@ -832,7 +832,7 @@ static int nldev_get_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
nlmsg_end(msg, nlh);
ib_device_put(device);
- return rdma_nl_unicast(msg, NETLINK_CB(skb).portid);
+ return rdma_nl_unicast(sock_net(skb->sk), msg, NETLINK_CB(skb).portid);
err_free:
nlmsg_free(msg);
@@ -972,7 +972,7 @@ static int nldev_port_get_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
nlmsg_end(msg, nlh);
ib_device_put(device);
- return rdma_nl_unicast(msg, NETLINK_CB(skb).portid);
+ return rdma_nl_unicast(sock_net(skb->sk), msg, NETLINK_CB(skb).portid);
err_free:
nlmsg_free(msg);
@@ -1074,7 +1074,7 @@ static int nldev_res_get_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
nlmsg_end(msg, nlh);
ib_device_put(device);
- return rdma_nl_unicast(msg, NETLINK_CB(skb).portid);
+ return rdma_nl_unicast(sock_net(skb->sk), msg, NETLINK_CB(skb).portid);
err_free:
nlmsg_free(msg);
@@ -1251,7 +1251,7 @@ static int res_get_common_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
nlmsg_end(msg, nlh);
ib_device_put(device);
- return rdma_nl_unicast(msg, NETLINK_CB(skb).portid);
+ return rdma_nl_unicast(sock_net(skb->sk), msg, NETLINK_CB(skb).portid);
err_free:
nlmsg_free(msg);
@@ -1596,7 +1596,7 @@ static int nldev_get_chardev(struct sk_buff *skb, struct nlmsghdr *nlh,
put_device(data.cdev);
if (ibdev)
ib_device_put(ibdev);
- return rdma_nl_unicast(msg, NETLINK_CB(skb).portid);
+ return rdma_nl_unicast(sock_net(skb->sk), msg, NETLINK_CB(skb).portid);
out_data:
put_device(data.cdev);
@@ -1636,7 +1636,7 @@ static int nldev_sys_get_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
return err;
}
nlmsg_end(msg, nlh);
- return rdma_nl_unicast(msg, NETLINK_CB(skb).portid);
+ return rdma_nl_unicast(sock_net(skb->sk), msg, NETLINK_CB(skb).portid);
}
static int nldev_set_sys_set_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
@@ -1734,7 +1734,7 @@ static int nldev_stat_set_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
nlmsg_end(msg, nlh);
ib_device_put(device);
- return rdma_nl_unicast(msg, NETLINK_CB(skb).portid);
+ return rdma_nl_unicast(sock_net(skb->sk), msg, NETLINK_CB(skb).portid);
err_fill:
rdma_counter_unbind_qpn(device, port, qpn, cntn);
@@ -1802,7 +1802,7 @@ static int nldev_stat_del_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
nlmsg_end(msg, nlh);
ib_device_put(device);
- return rdma_nl_unicast(msg, NETLINK_CB(skb).portid);
+ return rdma_nl_unicast(sock_net(skb->sk), msg, NETLINK_CB(skb).portid);
err_fill:
rdma_counter_bind_qpn(device, port, qpn, cntn);
@@ -1893,7 +1893,7 @@ static int stat_get_doit_default_counter(struct sk_buff *skb,
mutex_unlock(&stats->lock);
nlmsg_end(msg, nlh);
ib_device_put(device);
- return rdma_nl_unicast(msg, NETLINK_CB(skb).portid);
+ return rdma_nl_unicast(sock_net(skb->sk), msg, NETLINK_CB(skb).portid);
err_table:
nla_nest_cancel(msg, table_attr);
@@ -1961,7 +1961,7 @@ static int stat_get_doit_qp(struct sk_buff *skb, struct nlmsghdr *nlh,
nlmsg_end(msg, nlh);
ib_device_put(device);
- return rdma_nl_unicast(msg, NETLINK_CB(skb).portid);
+ return rdma_nl_unicast(sock_net(skb->sk), msg, NETLINK_CB(skb).portid);
err_msg:
nlmsg_free(msg);
diff --git a/drivers/infiniband/core/sa_query.c b/drivers/infiniband/core/sa_query.c
index 7d8071c7e564..17fc2936c077 100644
--- a/drivers/infiniband/core/sa_query.c
+++ b/drivers/infiniband/core/sa_query.c
@@ -860,7 +860,7 @@ static int ib_nl_send_msg(struct ib_sa_query *query, gfp_t gfp_mask)
/* Repair the nlmsg header length */
nlmsg_end(skb, nlh);
- return rdma_nl_multicast(skb, RDMA_NL_GROUP_LS, gfp_mask);
+ return rdma_nl_multicast(&init_net, skb, RDMA_NL_GROUP_LS, gfp_mask);
}
static int ib_nl_make_request(struct ib_sa_query *query, gfp_t gfp_mask)
diff --git a/include/rdma/rdma_netlink.h b/include/rdma/rdma_netlink.h
index 6631624e4d7c..ab22759de7ea 100644
--- a/include/rdma/rdma_netlink.h
+++ b/include/rdma/rdma_netlink.h
@@ -76,28 +76,32 @@ int ibnl_put_attr(struct sk_buff *skb, struct nlmsghdr *nlh,
/**
* Send the supplied skb to a specific userspace PID.
+ * @net: Net namespace in which to send the skb
* @skb: The netlink skb
* @pid: Userspace netlink process ID
* Returns 0 on success or a negative error code.
*/
-int rdma_nl_unicast(struct sk_buff *skb, u32 pid);
+int rdma_nl_unicast(struct net *net, struct sk_buff *skb, u32 pid);
/**
* Send, with wait/1 retry, the supplied skb to a specific userspace PID.
+ * @net: Net namespace in which to send the skb
* @skb: The netlink skb
* @pid: Userspace netlink process ID
* Returns 0 on success or a negative error code.
*/
-int rdma_nl_unicast_wait(struct sk_buff *skb, __u32 pid);
+int rdma_nl_unicast_wait(struct net *net, struct sk_buff *skb, __u32 pid);
/**
* Send the supplied skb to a netlink group.
+ * @net: Net namespace in which to send the skb
* @skb: The netlink skb
* @group: Netlink group ID
* @flags: allocation flags
* Returns 0 on success or a negative error code.
*/
-int rdma_nl_multicast(struct sk_buff *skb, unsigned int group, gfp_t flags);
+int rdma_nl_multicast(struct net *net, struct sk_buff *skb,
+ unsigned int group, gfp_t flags);
/**
* Check if there are any listeners to the netlink group
--
2.20.1
