diff options
author | Parav Pandit <parav@mellanox.com> | 2019-07-23 10:02:05 +0300 |
---|---|---|
committer | Jason Gunthorpe <jgg@mellanox.com> | 2019-07-25 14:12:41 -0300 |
commit | 1d2fedd8561dc469a7503855ee602f4bb3eccfa7 (patch) | |
tree | ca8ca8b8343497506abfc3c2d5942195f9e7aa54 | |
parent | 913df8c35322dcd15d993cabc8cc92814dee3d50 (diff) | |
download | linux-stable-1d2fedd8561dc469a7503855ee602f4bb3eccfa7.tar.gz linux-stable-1d2fedd8561dc469a7503855ee602f4bb3eccfa7.tar.bz2 linux-stable-1d2fedd8561dc469a7503855ee602f4bb3eccfa7.zip |
RDMA/core: Support netlink commands in non init_net net namespaces
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.
Link: https://lore.kernel.org/r/20190723070205.6247-1-leon@kernel.org
Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
-rw-r--r-- | drivers/infiniband/core/addr.c | 2 | ||||
-rw-r--r-- | drivers/infiniband/core/core_priv.h | 24 | ||||
-rw-r--r-- | drivers/infiniband/core/device.c | 38 | ||||
-rw-r--r-- | drivers/infiniband/core/iwpm_msg.c | 8 | ||||
-rw-r--r-- | drivers/infiniband/core/iwpm_util.c | 6 | ||||
-rw-r--r-- | drivers/infiniband/core/netlink.c | 63 | ||||
-rw-r--r-- | drivers/infiniband/core/nldev.c | 20 | ||||
-rw-r--r-- | drivers/infiniband/core/sa_query.c | 2 | ||||
-rw-r--r-- | include/rdma/rdma_netlink.h | 10 |
9 files changed, 105 insertions, 68 deletions
diff --git a/drivers/infiniband/core/addr.c b/drivers/infiniband/core/addr.c index 9b76a8fcdd24..1dd467bed8fc 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..589ed805e0ad 100644 --- a/drivers/infiniband/core/core_priv.h +++ b/drivers/infiniband/core/core_priv.h @@ -36,6 +36,8 @@ #include <linux/list.h> #include <linux/spinlock.h> #include <linux/cgroup_rdma.h> +#include <net/net_namespace.h> +#include <net/netns/generic.h> #include <rdma/ib_verbs.h> #include <rdma/opa_addr.h> @@ -54,8 +56,26 @@ 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; + +static inline struct rdma_dev_net *rdma_net_to_dev_net(struct net *net) +{ + return net_generic(net, rdma_dev_net_id); +} int ib_device_register_sysfs(struct ib_device *device); void ib_device_unregister_sysfs(struct ib_device *device); @@ -179,7 +199,6 @@ 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, @@ -362,4 +381,7 @@ 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 309210d2d4a8..c3576c7d2e8f 100644 --- a/drivers/infiniband/core/device.c +++ b/drivers/infiniband/core/device.c @@ -39,7 +39,6 @@ #include <linux/init.h> #include <linux/netdevice.h> #include <net/net_namespace.h> -#include <net/netns/generic.h> #include <linux/security.h> #include <linux/notifier.h> #include <linux/hashtable.h> @@ -105,17 +104,7 @@ 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 @@ -1050,7 +1039,7 @@ int rdma_compatdev_set(u8 enable) static void rdma_dev_exit_net(struct net *net) { - struct rdma_dev_net *rnet = net_generic(net, rdma_dev_net_id); + struct rdma_dev_net *rnet = rdma_net_to_dev_net(net); struct ib_device *dev; unsigned long index; int ret; @@ -1084,25 +1073,32 @@ static void rdma_dev_exit_net(struct net *net) } up_read(&devices_rwsem); + rdma_nl_net_exit(rnet); xa_erase(&rdma_nets, rnet->id); } static __net_init int rdma_dev_init_net(struct net *net) { - struct rdma_dev_net *rnet = net_generic(net, rdma_dev_net_id); + struct rdma_dev_net *rnet = rdma_net_to_dev_net(net); unsigned long index; 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 +2625,6 @@ 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 +2670,6 @@ err_mad: err_addr: addr_cleanup(); err_ibnl: - rdma_nl_exit(); -err_sysfs: class_unregister(&ib_class); err_comp_unbound: destroy_workqueue(ib_comp_unbound_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..67a76aca2dd6 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 = rdma_net_to_dev_net(&init_net); + + 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 +268,65 @@ 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 = rdma_net_to_dev_net(net); 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 = rdma_net_to_dev_net(net); 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 = rdma_net_to_dev_net(net); + + return nlmsg_multicast(rnet->nl_sock, skb, 0, group, flags); } EXPORT_SYMBOL(rdma_nl_multicast); -int __init rdma_nl_init(void) +void rdma_nl_exit(void) +{ + int idx; + + for (idx = 0; idx < RDMA_NL_NUM_CLIENTS; idx++) + WARN(rdma_nl_types[idx].cb_table, + "Nelink client %d wasn't released prior to unloading %s\n", + idx, KBUILD_MODNAME); +} + +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 |