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Release 4.15 net/hsr/hsr_netlink.c

Directory: net/hsr
/* Copyright 2011-2014 Autronica Fire and Security AS
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option)
 * any later version.
 *
 * Author(s):
 *      2011-2014 Arvid Brodin, arvid.brodin@alten.se
 *
 * Routines for handling Netlink messages for HSR.
 */

#include "hsr_netlink.h"
#include <linux/kernel.h>
#include <net/rtnetlink.h>
#include <net/genetlink.h>
#include "hsr_main.h"
#include "hsr_device.h"
#include "hsr_framereg.h"


static const struct nla_policy hsr_policy[IFLA_HSR_MAX + 1] = {
	[IFLA_HSR_SLAVE1]		= { .type = NLA_U32 },
	[IFLA_HSR_SLAVE2]		= { .type = NLA_U32 },
	[IFLA_HSR_MULTICAST_SPEC]	= { .type = NLA_U8 },
	[IFLA_HSR_VERSION]	= { .type = NLA_U8 },
	[IFLA_HSR_SUPERVISION_ADDR]	= { .len = ETH_ALEN },
	[IFLA_HSR_SEQ_NR]		= { .type = NLA_U16 },
};


/* Here, it seems a netdevice has already been allocated for us, and the
 * hsr_dev_setup routine has been executed. Nice!
 */

static int hsr_newlink(struct net *src_net, struct net_device *dev, struct nlattr *tb[], struct nlattr *data[], struct netlink_ext_ack *extack) { struct net_device *link[2]; unsigned char multicast_spec, hsr_version; if (!data) { netdev_info(dev, "HSR: No slave devices specified\n"); return -EINVAL; } if (!data[IFLA_HSR_SLAVE1]) { netdev_info(dev, "HSR: Slave1 device not specified\n"); return -EINVAL; } link[0] = __dev_get_by_index(src_net, nla_get_u32(data[IFLA_HSR_SLAVE1])); if (!data[IFLA_HSR_SLAVE2]) { netdev_info(dev, "HSR: Slave2 device not specified\n"); return -EINVAL; } link[1] = __dev_get_by_index(src_net, nla_get_u32(data[IFLA_HSR_SLAVE2])); if (!link[0] || !link[1]) return -ENODEV; if (link[0] == link[1]) return -EINVAL; if (!data[IFLA_HSR_MULTICAST_SPEC]) multicast_spec = 0; else multicast_spec = nla_get_u8(data[IFLA_HSR_MULTICAST_SPEC]); if (!data[IFLA_HSR_VERSION]) hsr_version = 0; else hsr_version = nla_get_u8(data[IFLA_HSR_VERSION]); return hsr_dev_finalize(dev, link, multicast_spec, hsr_version); }

Contributors

PersonTokensPropCommitsCommitProp
Arvid Brodin20386.38%250.00%
Peter Heise2711.49%125.00%
Matthias Schiffer52.13%125.00%
Total235100.00%4100.00%


static int hsr_fill_info(struct sk_buff *skb, const struct net_device *dev) { struct hsr_priv *hsr; struct hsr_port *port; int res; hsr = netdev_priv(dev); res = 0; rcu_read_lock(); port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_A); if (port) res = nla_put_u32(skb, IFLA_HSR_SLAVE1, port->dev->ifindex); rcu_read_unlock(); if (res) goto nla_put_failure; rcu_read_lock(); port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_B); if (port) res = nla_put_u32(skb, IFLA_HSR_SLAVE2, port->dev->ifindex); rcu_read_unlock(); if (res) goto nla_put_failure; if (nla_put(skb, IFLA_HSR_SUPERVISION_ADDR, ETH_ALEN, hsr->sup_multicast_addr) || nla_put_u16(skb, IFLA_HSR_SEQ_NR, hsr->sequence_nr)) goto nla_put_failure; return 0; nla_put_failure: return -EMSGSIZE; }

Contributors

PersonTokensPropCommitsCommitProp
Arvid Brodin161100.00%4100.00%
Total161100.00%4100.00%

static struct rtnl_link_ops hsr_link_ops __read_mostly = { .kind = "hsr", .maxtype = IFLA_HSR_MAX, .policy = hsr_policy, .priv_size = sizeof(struct hsr_priv), .setup = hsr_dev_setup, .newlink = hsr_newlink, .fill_info = hsr_fill_info, }; /* attribute policy */ static const struct nla_policy hsr_genl_policy[HSR_A_MAX + 1] = { [HSR_A_NODE_ADDR] = { .len = ETH_ALEN }, [HSR_A_NODE_ADDR_B] = { .len = ETH_ALEN }, [HSR_A_IFINDEX] = { .type = NLA_U32 }, [HSR_A_IF1_AGE] = { .type = NLA_U32 }, [HSR_A_IF2_AGE] = { .type = NLA_U32 }, [HSR_A_IF1_SEQ] = { .type = NLA_U16 }, [HSR_A_IF2_SEQ] = { .type = NLA_U16 }, }; static struct genl_family hsr_genl_family; static const struct genl_multicast_group hsr_mcgrps[] = { { .name = "hsr-network", }, }; /* This is called if for some node with MAC address addr, we only get frames * over one of the slave interfaces. This would indicate an open network ring * (i.e. a link has failed somewhere). */
void hsr_nl_ringerror(struct hsr_priv *hsr, unsigned char addr[ETH_ALEN], struct hsr_port *port) { struct sk_buff *skb; void *msg_head; struct hsr_port *master; int res; skb = genlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC); if (!skb) goto fail; msg_head = genlmsg_put(skb, 0, 0, &hsr_genl_family, 0, HSR_C_RING_ERROR); if (!msg_head) goto nla_put_failure; res = nla_put(skb, HSR_A_NODE_ADDR, ETH_ALEN, addr); if (res < 0) goto nla_put_failure; res = nla_put_u32(skb, HSR_A_IFINDEX, port->dev->ifindex); if (res < 0) goto nla_put_failure; genlmsg_end(skb, msg_head); genlmsg_multicast(&hsr_genl_family, skb, 0, 0, GFP_ATOMIC); return; nla_put_failure: kfree_skb(skb); fail: rcu_read_lock(); master = hsr_port_get_hsr(hsr, HSR_PT_MASTER); netdev_warn(master->dev, "Could not send HSR ring error message\n"); rcu_read_unlock(); }

Contributors

PersonTokensPropCommitsCommitProp
Arvid Brodin17997.81%360.00%
Johannes Berg42.19%240.00%
Total183100.00%5100.00%

/* This is called when we haven't heard from the node with MAC address addr for * some time (just before the node is removed from the node table/list). */
void hsr_nl_nodedown(struct hsr_priv *hsr, unsigned char addr[ETH_ALEN]) { struct sk_buff *skb; void *msg_head; struct hsr_port *master; int res; skb = genlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC); if (!skb) goto fail; msg_head = genlmsg_put(skb, 0, 0, &hsr_genl_family, 0, HSR_C_NODE_DOWN); if (!msg_head) goto nla_put_failure; res = nla_put(skb, HSR_A_NODE_ADDR, ETH_ALEN, addr); if (res < 0) goto nla_put_failure; genlmsg_end(skb, msg_head); genlmsg_multicast(&hsr_genl_family, skb, 0, 0, GFP_ATOMIC); return; nla_put_failure: kfree_skb(skb); fail: rcu_read_lock(); master = hsr_port_get_hsr(hsr, HSR_PT_MASTER); netdev_warn(master->dev, "Could not send HSR node down\n"); rcu_read_unlock(); }

Contributors

PersonTokensPropCommitsCommitProp
Arvid Brodin15097.40%360.00%
Johannes Berg42.60%240.00%
Total154100.00%5100.00%

/* HSR_C_GET_NODE_STATUS lets userspace query the internal HSR node table * about the status of a specific node in the network, defined by its MAC * address. * * Input: hsr ifindex, node mac address * Output: hsr ifindex, node mac address (copied from request), * age of latest frame from node over slave 1, slave 2 [ms] */
static int hsr_get_node_status(struct sk_buff *skb_in, struct genl_info *info) { /* For receiving */ struct nlattr *na; struct net_device *hsr_dev; /* For sending */ struct sk_buff *skb_out; void *msg_head; struct hsr_priv *hsr; struct hsr_port *port; unsigned char hsr_node_addr_b[ETH_ALEN]; int hsr_node_if1_age; u16 hsr_node_if1_seq; int hsr_node_if2_age; u16 hsr_node_if2_seq; int addr_b_ifindex; int res; if (!info) goto invalid; na = info->attrs[HSR_A_IFINDEX]; if (!na) goto invalid; na = info->attrs[HSR_A_NODE_ADDR]; if (!na) goto invalid; hsr_dev = __dev_get_by_index(genl_info_net(info), nla_get_u32(info->attrs[HSR_A_IFINDEX])); if (!hsr_dev) goto invalid; if (!is_hsr_master(hsr_dev)) goto invalid; /* Send reply */ skb_out = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); if (!skb_out) { res = -ENOMEM; goto fail; } msg_head = genlmsg_put(skb_out, NETLINK_CB(skb_in).portid, info->snd_seq, &hsr_genl_family, 0, HSR_C_SET_NODE_STATUS); if (!msg_head) { res = -ENOMEM; goto nla_put_failure; } res = nla_put_u32(skb_out, HSR_A_IFINDEX, hsr_dev->ifindex); if (res < 0) goto nla_put_failure; hsr = netdev_priv(hsr_dev); res = hsr_get_node_data(hsr, (unsigned char *) nla_data(info->attrs[HSR_A_NODE_ADDR]), hsr_node_addr_b, &addr_b_ifindex, &hsr_node_if1_age, &hsr_node_if1_seq, &hsr_node_if2_age, &hsr_node_if2_seq); if (res < 0) goto nla_put_failure; res = nla_put(skb_out, HSR_A_NODE_ADDR, ETH_ALEN, nla_data(info->attrs[HSR_A_NODE_ADDR])); if (res < 0) goto nla_put_failure; if (addr_b_ifindex > -1) { res = nla_put(skb_out, HSR_A_NODE_ADDR_B, ETH_ALEN, hsr_node_addr_b); if (res < 0) goto nla_put_failure; res = nla_put_u32(skb_out, HSR_A_ADDR_B_IFINDEX, addr_b_ifindex); if (res < 0) goto nla_put_failure; } res = nla_put_u32(skb_out, HSR_A_IF1_AGE, hsr_node_if1_age); if (res < 0) goto nla_put_failure; res = nla_put_u16(skb_out, HSR_A_IF1_SEQ, hsr_node_if1_seq); if (res < 0) goto nla_put_failure; rcu_read_lock(); port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_A); if (port) res = nla_put_u32(skb_out, HSR_A_IF1_IFINDEX, port->dev->ifindex); rcu_read_unlock(); if (res < 0) goto nla_put_failure; res = nla_put_u32(skb_out, HSR_A_IF2_AGE, hsr_node_if2_age); if (res < 0) goto nla_put_failure; res = nla_put_u16(skb_out, HSR_A_IF2_SEQ, hsr_node_if2_seq); if (res < 0) goto nla_put_failure; rcu_read_lock(); port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_B); if (port) res = nla_put_u32(skb_out, HSR_A_IF2_IFINDEX, port->dev->ifindex); rcu_read_unlock(); if (res < 0) goto nla_put_failure; genlmsg_end(skb_out, msg_head); genlmsg_unicast(genl_info_net(info), skb_out, info->snd_portid); return 0; invalid: netlink_ack(skb_in, nlmsg_hdr(skb_in), -EINVAL, NULL); return 0; nla_put_failure: kfree_skb(skb_out); /* Fall through */ fail: return res; }

Contributors

PersonTokensPropCommitsCommitProp
Arvid Brodin59699.50%466.67%
Johannes Berg20.33%116.67%
Geyslan G. Bem10.17%116.67%
Total599100.00%6100.00%

/* Get a list of MacAddressA of all nodes known to this node (including self). */
static int hsr_get_node_list(struct sk_buff *skb_in, struct genl_info *info) { /* For receiving */ struct nlattr *na; struct net_device *hsr_dev; /* For sending */ struct sk_buff *skb_out; void *msg_head; struct hsr_priv *hsr; void *pos; unsigned char addr[ETH_ALEN]; int res; if (!info) goto invalid; na = info->attrs[HSR_A_IFINDEX]; if (!na) goto invalid; hsr_dev = __dev_get_by_index(genl_info_net(info), nla_get_u32(info->attrs[HSR_A_IFINDEX])); if (!hsr_dev) goto invalid; if (!is_hsr_master(hsr_dev)) goto invalid; /* Send reply */ skb_out = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); if (!skb_out) { res = -ENOMEM; goto fail; } msg_head = genlmsg_put(skb_out, NETLINK_CB(skb_in).portid, info->snd_seq, &hsr_genl_family, 0, HSR_C_SET_NODE_LIST); if (!msg_head) { res = -ENOMEM; goto nla_put_failure; } res = nla_put_u32(skb_out, HSR_A_IFINDEX, hsr_dev->ifindex); if (res < 0) goto nla_put_failure; hsr = netdev_priv(hsr_dev); rcu_read_lock(); pos = hsr_get_next_node(hsr, NULL, addr); while (pos) { res = nla_put(skb_out, HSR_A_NODE_ADDR, ETH_ALEN, addr); if (res < 0) { rcu_read_unlock(); goto nla_put_failure; } pos = hsr_get_next_node(hsr, pos, addr); } rcu_read_unlock(); genlmsg_end(skb_out, msg_head); genlmsg_unicast(genl_info_net(info), skb_out, info->snd_portid); return 0; invalid: netlink_ack(skb_in, nlmsg_hdr(skb_in), -EINVAL, NULL); return 0; nla_put_failure: kfree_skb(skb_out); /* Fall through */ fail: return res; }

Contributors

PersonTokensPropCommitsCommitProp
Arvid Brodin33099.40%266.67%
Johannes Berg20.60%133.33%
Total332100.00%3100.00%

static const struct genl_ops hsr_ops[] = { { .cmd = HSR_C_GET_NODE_STATUS, .flags = 0, .policy = hsr_genl_policy, .doit = hsr_get_node_status, .dumpit = NULL, }, { .cmd = HSR_C_GET_NODE_LIST, .flags = 0, .policy = hsr_genl_policy, .doit = hsr_get_node_list, .dumpit = NULL, }, }; static struct genl_family hsr_genl_family __ro_after_init = { .hdrsize = 0, .name = "HSR", .version = 1, .maxattr = HSR_A_MAX, .module = THIS_MODULE, .ops = hsr_ops, .n_ops = ARRAY_SIZE(hsr_ops), .mcgrps = hsr_mcgrps, .n_mcgrps = ARRAY_SIZE(hsr_mcgrps), };
int __init hsr_netlink_init(void) { int rc; rc = rtnl_link_register(&hsr_link_ops); if (rc) goto fail_rtnl_link_register; rc = genl_register_family(&hsr_genl_family); if (rc) goto fail_genl_register_family; return 0; fail_genl_register_family: rtnl_link_unregister(&hsr_link_ops); fail_rtnl_link_register: return rc; }

Contributors

PersonTokensPropCommitsCommitProp
Arvid Brodin5596.49%133.33%
Johannes Berg23.51%266.67%
Total57100.00%3100.00%


void __exit hsr_netlink_exit(void) { genl_unregister_family(&hsr_genl_family); rtnl_link_unregister(&hsr_link_ops); }

Contributors

PersonTokensPropCommitsCommitProp
Arvid Brodin20100.00%1100.00%
Total20100.00%1100.00%

MODULE_ALIAS_RTNL_LINK("hsr");

Overall Contributors

PersonTokensPropCommitsCommitProp
Arvid Brodin197992.78%741.18%
Johannes Berg1105.16%741.18%
Peter Heise381.78%15.88%
Matthias Schiffer50.23%15.88%
Geyslan G. Bem10.05%15.88%
Total2133100.00%17100.00%
Directory: net/hsr
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