Contributors: 14
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Leon Romanovsky |
456 |
38.00% |
17 |
50.00% |
| Roland Dreier |
342 |
28.50% |
1 |
2.94% |
| Kaike Wan |
123 |
10.25% |
1 |
2.94% |
| Mustafa Ismail |
70 |
5.83% |
2 |
5.88% |
| Tatyana Nikolova |
61 |
5.08% |
1 |
2.94% |
| Michael J. Ruhl |
47 |
3.92% |
1 |
2.94% |
| Jason Gunthorpe |
40 |
3.33% |
2 |
5.88% |
| Pablo Neira Ayuso |
25 |
2.08% |
2 |
5.88% |
| Linus Torvalds |
13 |
1.08% |
1 |
2.94% |
| David S. Miller |
12 |
1.00% |
2 |
5.88% |
| Johannes Berg |
6 |
0.50% |
1 |
2.94% |
| Paul Gortmaker |
3 |
0.25% |
1 |
2.94% |
| Greg Rose |
1 |
0.08% |
1 |
2.94% |
| Mark Bloch |
1 |
0.08% |
1 |
2.94% |
| Total |
1200 |
|
34 |
|
/*
* Copyright (c) 2017 Mellanox Technologies Inc. All rights reserved.
* Copyright (c) 2010 Voltaire Inc. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - 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.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#define pr_fmt(fmt) "%s:%s: " fmt, KBUILD_MODNAME, __func__
#include <linux/export.h>
#include <net/netlink.h>
#include <net/net_namespace.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);
}
EXPORT_SYMBOL(rdma_nl_chk_listeners);
static bool is_nl_msg_valid(unsigned int type, unsigned int op)
{
static const unsigned int max_num_ops[RDMA_NL_NUM_CLIENTS] = {
[RDMA_NL_IWCM] = RDMA_NL_IWPM_NUM_OPS,
[RDMA_NL_LS] = RDMA_NL_LS_NUM_OPS,
[RDMA_NL_NLDEV] = RDMA_NLDEV_NUM_OPS,
};
/*
* This BUILD_BUG_ON is intended to catch addition of new
* RDMA netlink protocol without updating the array above.
*/
BUILD_BUG_ON(RDMA_NL_NUM_CLIENTS != 6);
if (type >= RDMA_NL_NUM_CLIENTS)
return false;
return (op < max_num_ops[type]) ? true : false;
}
static bool is_nl_valid(unsigned int type, unsigned int op)
{
const struct rdma_nl_cbs *cb_table;
if (!is_nl_msg_valid(type, op))
return false;
if (!rdma_nl_types[type].cb_table) {
mutex_unlock(&rdma_nl_mutex);
request_module("rdma-netlink-subsys-%d", type);
mutex_lock(&rdma_nl_mutex);
}
cb_table = rdma_nl_types[type].cb_table;
if (!cb_table || (!cb_table[op].dump && !cb_table[op].doit))
return false;
return true;
}
void rdma_nl_register(unsigned int index,
const struct rdma_nl_cbs cb_table[])
{
mutex_lock(&rdma_nl_mutex);
if (!is_nl_msg_valid(index, 0)) {
/*
* All clients are not interesting in success/failure of
* this call. They want to see the print to error log and
* continue their initialization. Print warning for them,
* because it is programmer's error to be here.
*/
mutex_unlock(&rdma_nl_mutex);
WARN(true,
"The not-valid %u index was supplied to RDMA netlink\n",
index);
return;
}
if (rdma_nl_types[index].cb_table) {
mutex_unlock(&rdma_nl_mutex);
WARN(true,
"The %u index is already registered in RDMA netlink\n",
index);
return;
}
rdma_nl_types[index].cb_table = cb_table;
mutex_unlock(&rdma_nl_mutex);
}
EXPORT_SYMBOL(rdma_nl_register);
void rdma_nl_unregister(unsigned int index)
{
mutex_lock(&rdma_nl_mutex);
rdma_nl_types[index].cb_table = NULL;
mutex_unlock(&rdma_nl_mutex);
}
EXPORT_SYMBOL(rdma_nl_unregister);
void *ibnl_put_msg(struct sk_buff *skb, struct nlmsghdr **nlh, int seq,
int len, int client, int op, int flags)
{
*nlh = nlmsg_put(skb, 0, seq, RDMA_NL_GET_TYPE(client, op), len, flags);
if (!*nlh)
return NULL;
return nlmsg_data(*nlh);
}
EXPORT_SYMBOL(ibnl_put_msg);
int ibnl_put_attr(struct sk_buff *skb, struct nlmsghdr *nlh,
int len, void *data, int type)
{
if (nla_put(skb, type, len, data)) {
nlmsg_cancel(skb, nlh);
return -EMSGSIZE;
}
return 0;
}
EXPORT_SYMBOL(ibnl_put_attr);
static int rdma_nl_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
struct netlink_ext_ack *extack)
{
int type = nlh->nlmsg_type;
unsigned int index = RDMA_NL_GET_CLIENT(type);
unsigned int op = RDMA_NL_GET_OP(type);
const struct rdma_nl_cbs *cb_table;
if (!is_nl_valid(index, op))
return -EINVAL;
cb_table = rdma_nl_types[index].cb_table;
if ((cb_table[op].flags & RDMA_NL_ADMIN_PERM) &&
!netlink_capable(skb, CAP_NET_ADMIN))
return -EPERM;
/*
* LS responses overload the 0x100 (NLM_F_ROOT) flag. Don't
* mistakenly call the .dump() function.
*/
if (index == RDMA_NL_LS) {
if (cb_table[op].doit)
return cb_table[op].doit(skb, nlh, extack);
return -EINVAL;
}
/* FIXME: Convert IWCM to properly handle doit callbacks */
if ((nlh->nlmsg_flags & NLM_F_DUMP) || index == RDMA_NL_IWCM) {
struct netlink_dump_control c = {
.dump = cb_table[op].dump,
};
if (c.dump)
return netlink_dump_start(nls, skb, nlh, &c);
return -EINVAL;
}
if (cb_table[op].doit)
return cb_table[op].doit(skb, nlh, extack);
return 0;
}
/*
* This function is similar to netlink_rcv_skb with one exception:
* It calls to the callback for the netlink messages without NLM_F_REQUEST
* flag. These messages are intended for RDMA_NL_LS consumer, so it is allowed
* for that consumer only.
*/
static int rdma_nl_rcv_skb(struct sk_buff *skb, int (*cb)(struct sk_buff *,
struct nlmsghdr *,
struct netlink_ext_ack *))
{
struct netlink_ext_ack extack = {};
struct nlmsghdr *nlh;
int err;
while (skb->len >= nlmsg_total_size(0)) {
int msglen;
nlh = nlmsg_hdr(skb);
err = 0;
if (nlh->nlmsg_len < NLMSG_HDRLEN || skb->len < nlh->nlmsg_len)
return 0;
/*
* Generally speaking, the only requests are handled
* by the kernel, but RDMA_NL_LS is different, because it
* runs backward netlink scheme. Kernel initiates messages
* and waits for reply with data to keep pathrecord cache
* in sync.
*/
if (!(nlh->nlmsg_flags & NLM_F_REQUEST) &&
(RDMA_NL_GET_CLIENT(nlh->nlmsg_type) != RDMA_NL_LS))
goto ack;
/* Skip control messages */
if (nlh->nlmsg_type < NLMSG_MIN_TYPE)
goto ack;
err = cb(skb, nlh, &extack);
if (err == -EINTR)
goto skip;
ack:
if (nlh->nlmsg_flags & NLM_F_ACK || err)
netlink_ack(skb, nlh, err, &extack);
skip:
msglen = NLMSG_ALIGN(nlh->nlmsg_len);
if (msglen > skb->len)
msglen = skb->len;
skb_pull(skb, msglen);
}
return 0;
}
static void rdma_nl_rcv(struct sk_buff *skb)
{
mutex_lock(&rdma_nl_mutex);
rdma_nl_rcv_skb(skb, &rdma_nl_rcv_msg);
mutex_unlock(&rdma_nl_mutex);
}
int rdma_nl_unicast(struct sk_buff *skb, u32 pid)
{
int err;
err = netlink_unicast(nls, 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 err;
err = netlink_unicast(nls, 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)
{
return nlmsg_multicast(nls, skb, 0, group, flags);
}
EXPORT_SYMBOL(rdma_nl_multicast);
int __init rdma_nl_init(void)
{
struct netlink_kernel_cfg cfg = {
.input = rdma_nl_rcv,
};
nls = netlink_kernel_create(&init_net, NETLINK_RDMA, &cfg);
if (!nls)
return -ENOMEM;
nls->sk_sndtimeo = 10 * HZ;
return 0;
}
void rdma_nl_exit(void)
{
int idx;
for (idx = 0; idx < RDMA_NL_NUM_CLIENTS; idx++)
rdma_nl_unregister(idx);
netlink_kernel_release(nls);
}
MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_RDMA);