2 * Copyright (c) 2017 Mellanox Technologies. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * 3. Neither the names of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
16 * Alternatively, this software may be distributed under the terms of the
17 * GNU General Public License ("GPL") version 2 as published by the Free
18 * Software Foundation.
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
33 #include <linux/module.h>
34 #include <net/netlink.h>
35 #include <rdma/rdma_netlink.h>
37 #include "core_priv.h"
39 static const struct nla_policy nldev_policy[RDMA_NLDEV_ATTR_MAX] = {
40 [RDMA_NLDEV_ATTR_DEV_INDEX] = { .type = NLA_U32 },
41 [RDMA_NLDEV_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING,
42 .len = IB_DEVICE_NAME_MAX - 1},
43 [RDMA_NLDEV_ATTR_PORT_INDEX] = { .type = NLA_U32 },
44 [RDMA_NLDEV_ATTR_FW_VERSION] = { .type = NLA_NUL_STRING,
45 .len = IB_FW_VERSION_NAME_MAX - 1},
46 [RDMA_NLDEV_ATTR_NODE_GUID] = { .type = NLA_U64 },
47 [RDMA_NLDEV_ATTR_SYS_IMAGE_GUID] = { .type = NLA_U64 },
48 [RDMA_NLDEV_ATTR_SUBNET_PREFIX] = { .type = NLA_U64 },
49 [RDMA_NLDEV_ATTR_LID] = { .type = NLA_U32 },
50 [RDMA_NLDEV_ATTR_SM_LID] = { .type = NLA_U32 },
51 [RDMA_NLDEV_ATTR_LMC] = { .type = NLA_U8 },
52 [RDMA_NLDEV_ATTR_PORT_STATE] = { .type = NLA_U8 },
53 [RDMA_NLDEV_ATTR_PORT_PHYS_STATE] = { .type = NLA_U8 },
54 [RDMA_NLDEV_ATTR_DEV_NODE_TYPE] = { .type = NLA_U8 },
57 static int fill_dev_info(struct sk_buff *msg, struct ib_device *device)
59 char fw[IB_FW_VERSION_NAME_MAX];
61 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_DEV_INDEX, device->index))
63 if (nla_put_string(msg, RDMA_NLDEV_ATTR_DEV_NAME, device->name))
65 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, rdma_end_port(device)))
68 BUILD_BUG_ON(sizeof(device->attrs.device_cap_flags) != sizeof(u64));
69 if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_CAP_FLAGS,
70 device->attrs.device_cap_flags, 0))
73 ib_get_device_fw_str(device, fw);
74 /* Device without FW has strlen(fw) */
75 if (strlen(fw) && nla_put_string(msg, RDMA_NLDEV_ATTR_FW_VERSION, fw))
78 if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_NODE_GUID,
79 be64_to_cpu(device->node_guid), 0))
81 if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_SYS_IMAGE_GUID,
82 be64_to_cpu(device->attrs.sys_image_guid), 0))
84 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_DEV_NODE_TYPE, device->node_type))
89 static int fill_port_info(struct sk_buff *msg,
90 struct ib_device *device, u32 port)
92 struct ib_port_attr attr;
95 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_DEV_INDEX, device->index))
97 if (nla_put_string(msg, RDMA_NLDEV_ATTR_DEV_NAME, device->name))
99 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, port))
102 ret = ib_query_port(device, port, &attr);
106 BUILD_BUG_ON(sizeof(attr.port_cap_flags) > sizeof(u64));
107 if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_CAP_FLAGS,
108 (u64)attr.port_cap_flags, 0))
110 if (rdma_protocol_ib(device, port) &&
111 nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_SUBNET_PREFIX,
112 attr.subnet_prefix, 0))
114 if (rdma_protocol_ib(device, port)) {
115 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_LID, attr.lid))
117 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_SM_LID, attr.sm_lid))
119 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_LMC, attr.lmc))
122 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_PORT_STATE, attr.state))
124 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_PORT_PHYS_STATE, attr.phys_state))
129 static int nldev_get_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
130 struct netlink_ext_ack *extack)
132 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
133 struct ib_device *device;
138 err = nlmsg_parse(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
139 nldev_policy, extack);
140 if (err || !tb[RDMA_NLDEV_ATTR_DEV_INDEX])
143 index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
145 device = __ib_device_get_by_index(index);
149 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
153 nlh = nlmsg_put(msg, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
154 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, RDMA_NLDEV_CMD_GET),
157 err = fill_dev_info(msg, device);
165 return rdma_nl_unicast(msg, NETLINK_CB(skb).portid);
168 static int _nldev_get_dumpit(struct ib_device *device,
170 struct netlink_callback *cb,
173 int start = cb->args[0];
174 struct nlmsghdr *nlh;
179 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
180 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, RDMA_NLDEV_CMD_GET),
183 if (fill_dev_info(skb, device)) {
184 nlmsg_cancel(skb, nlh);
192 out: cb->args[0] = idx;
196 static int nldev_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb)
199 * There is no need to take lock, because
200 * we are relying on ib_core's lists_rwsem
202 return ib_enum_all_devs(_nldev_get_dumpit, skb, cb);
205 static int nldev_port_get_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
206 struct netlink_ext_ack *extack)
208 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
209 struct ib_device *device;
215 err = nlmsg_parse(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
216 nldev_policy, extack);
217 if (err || !tb[RDMA_NLDEV_ATTR_PORT_INDEX])
220 index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
221 device = __ib_device_get_by_index(index);
225 port = nla_get_u32(tb[RDMA_NLDEV_ATTR_PORT_INDEX]);
226 if (!rdma_is_port_valid(device, port))
229 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
233 nlh = nlmsg_put(msg, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
234 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, RDMA_NLDEV_CMD_GET),
237 err = fill_port_info(msg, device, port);
245 return rdma_nl_unicast(msg, NETLINK_CB(skb).portid);
248 static int nldev_port_get_dumpit(struct sk_buff *skb,
249 struct netlink_callback *cb)
251 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
252 struct ib_device *device;
253 int start = cb->args[0];
254 struct nlmsghdr *nlh;
260 err = nlmsg_parse(cb->nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
262 if (err || !tb[RDMA_NLDEV_ATTR_DEV_INDEX])
265 ifindex = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
266 device = __ib_device_get_by_index(ifindex);
270 for (p = rdma_start_port(device); p <= rdma_end_port(device); ++p) {
272 * The dumpit function returns all information from specific
273 * index. This specific index is taken from the netlink
274 * messages request sent by user and it is available
277 * Usually, the user doesn't fill this field and it causes
278 * to return everything.
286 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid,
288 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV,
289 RDMA_NLDEV_CMD_PORT_GET),
292 if (fill_port_info(skb, device, p)) {
293 nlmsg_cancel(skb, nlh);
300 out: cb->args[0] = idx;
304 static const struct rdma_nl_cbs nldev_cb_table[] = {
305 [RDMA_NLDEV_CMD_GET] = {
306 .doit = nldev_get_doit,
307 .dump = nldev_get_dumpit,
309 [RDMA_NLDEV_CMD_PORT_GET] = {
310 .doit = nldev_port_get_doit,
311 .dump = nldev_port_get_dumpit,
315 void __init nldev_init(void)
317 rdma_nl_register(RDMA_NL_NLDEV, nldev_cb_table);
320 void __exit nldev_exit(void)
322 rdma_nl_unregister(RDMA_NL_NLDEV);
325 MODULE_ALIAS_RDMA_NETLINK(RDMA_NL_NLDEV, 5);