422 lines
9.6 KiB
C
422 lines
9.6 KiB
C
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/*
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* Copyright Samuel Mendoza-Jonas, IBM Corporation 2018.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/if_arp.h>
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#include <linux/rtnetlink.h>
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#include <linux/etherdevice.h>
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#include <linux/module.h>
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#include <net/genetlink.h>
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#include <net/ncsi.h>
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#include <linux/skbuff.h>
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#include <net/sock.h>
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#include <uapi/linux/ncsi.h>
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#include "internal.h"
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#include "ncsi-netlink.h"
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static struct genl_family ncsi_genl_family;
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static const struct nla_policy ncsi_genl_policy[NCSI_ATTR_MAX + 1] = {
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[NCSI_ATTR_IFINDEX] = { .type = NLA_U32 },
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[NCSI_ATTR_PACKAGE_LIST] = { .type = NLA_NESTED },
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[NCSI_ATTR_PACKAGE_ID] = { .type = NLA_U32 },
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[NCSI_ATTR_CHANNEL_ID] = { .type = NLA_U32 },
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};
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static struct ncsi_dev_priv *ndp_from_ifindex(struct net *net, u32 ifindex)
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{
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struct ncsi_dev_priv *ndp;
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struct net_device *dev;
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struct ncsi_dev *nd;
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struct ncsi_dev;
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if (!net)
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return NULL;
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dev = dev_get_by_index(net, ifindex);
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if (!dev) {
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pr_err("NCSI netlink: No device for ifindex %u\n", ifindex);
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return NULL;
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}
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nd = ncsi_find_dev(dev);
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ndp = nd ? TO_NCSI_DEV_PRIV(nd) : NULL;
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dev_put(dev);
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return ndp;
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}
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static int ncsi_write_channel_info(struct sk_buff *skb,
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struct ncsi_dev_priv *ndp,
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struct ncsi_channel *nc)
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{
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struct nlattr *vid_nest;
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struct ncsi_channel_filter *ncf;
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struct ncsi_channel_mode *m;
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u32 *data;
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int i;
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nla_put_u32(skb, NCSI_CHANNEL_ATTR_ID, nc->id);
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m = &nc->modes[NCSI_MODE_LINK];
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nla_put_u32(skb, NCSI_CHANNEL_ATTR_LINK_STATE, m->data[2]);
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if (nc->state == NCSI_CHANNEL_ACTIVE)
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nla_put_flag(skb, NCSI_CHANNEL_ATTR_ACTIVE);
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if (ndp->force_channel == nc)
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nla_put_flag(skb, NCSI_CHANNEL_ATTR_FORCED);
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nla_put_u32(skb, NCSI_CHANNEL_ATTR_VERSION_MAJOR, nc->version.version);
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nla_put_u32(skb, NCSI_CHANNEL_ATTR_VERSION_MINOR, nc->version.alpha2);
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nla_put_string(skb, NCSI_CHANNEL_ATTR_VERSION_STR, nc->version.fw_name);
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vid_nest = nla_nest_start(skb, NCSI_CHANNEL_ATTR_VLAN_LIST);
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if (!vid_nest)
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return -ENOMEM;
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ncf = nc->filters[NCSI_FILTER_VLAN];
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i = -1;
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if (ncf) {
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while ((i = find_next_bit((void *)&ncf->bitmap, ncf->total,
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i + 1)) < ncf->total) {
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data = ncsi_get_filter(nc, NCSI_FILTER_VLAN, i);
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/* Uninitialised channels will have 'zero' vlan ids */
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if (!data || !*data)
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continue;
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nla_put_u16(skb, NCSI_CHANNEL_ATTR_VLAN_ID,
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*(u16 *)data);
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}
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}
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nla_nest_end(skb, vid_nest);
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return 0;
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}
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static int ncsi_write_package_info(struct sk_buff *skb,
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struct ncsi_dev_priv *ndp, unsigned int id)
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{
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struct nlattr *pnest, *cnest, *nest;
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struct ncsi_package *np;
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struct ncsi_channel *nc;
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bool found;
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int rc;
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if (id > ndp->package_num) {
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netdev_info(ndp->ndev.dev, "NCSI: No package with id %u\n", id);
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return -ENODEV;
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}
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found = false;
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NCSI_FOR_EACH_PACKAGE(ndp, np) {
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if (np->id != id)
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continue;
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pnest = nla_nest_start(skb, NCSI_PKG_ATTR);
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if (!pnest)
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return -ENOMEM;
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nla_put_u32(skb, NCSI_PKG_ATTR_ID, np->id);
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if (ndp->force_package == np)
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nla_put_flag(skb, NCSI_PKG_ATTR_FORCED);
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cnest = nla_nest_start(skb, NCSI_PKG_ATTR_CHANNEL_LIST);
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if (!cnest) {
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nla_nest_cancel(skb, pnest);
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return -ENOMEM;
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}
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NCSI_FOR_EACH_CHANNEL(np, nc) {
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nest = nla_nest_start(skb, NCSI_CHANNEL_ATTR);
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if (!nest) {
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nla_nest_cancel(skb, cnest);
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nla_nest_cancel(skb, pnest);
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return -ENOMEM;
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}
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rc = ncsi_write_channel_info(skb, ndp, nc);
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if (rc) {
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nla_nest_cancel(skb, nest);
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nla_nest_cancel(skb, cnest);
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nla_nest_cancel(skb, pnest);
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return rc;
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}
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nla_nest_end(skb, nest);
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}
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nla_nest_end(skb, cnest);
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nla_nest_end(skb, pnest);
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found = true;
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}
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if (!found)
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return -ENODEV;
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return 0;
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}
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static int ncsi_pkg_info_nl(struct sk_buff *msg, struct genl_info *info)
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{
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struct ncsi_dev_priv *ndp;
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unsigned int package_id;
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struct sk_buff *skb;
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struct nlattr *attr;
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void *hdr;
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int rc;
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if (!info || !info->attrs)
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return -EINVAL;
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if (!info->attrs[NCSI_ATTR_IFINDEX])
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return -EINVAL;
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if (!info->attrs[NCSI_ATTR_PACKAGE_ID])
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return -EINVAL;
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ndp = ndp_from_ifindex(genl_info_net(info),
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nla_get_u32(info->attrs[NCSI_ATTR_IFINDEX]));
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if (!ndp)
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return -ENODEV;
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skb = genlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
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if (!skb)
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return -ENOMEM;
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hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
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&ncsi_genl_family, 0, NCSI_CMD_PKG_INFO);
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if (!hdr) {
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kfree(skb);
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return -EMSGSIZE;
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}
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package_id = nla_get_u32(info->attrs[NCSI_ATTR_PACKAGE_ID]);
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attr = nla_nest_start(skb, NCSI_ATTR_PACKAGE_LIST);
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rc = ncsi_write_package_info(skb, ndp, package_id);
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if (rc) {
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nla_nest_cancel(skb, attr);
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goto err;
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}
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nla_nest_end(skb, attr);
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genlmsg_end(skb, hdr);
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return genlmsg_reply(skb, info);
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err:
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genlmsg_cancel(skb, hdr);
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kfree(skb);
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return rc;
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}
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static int ncsi_pkg_info_all_nl(struct sk_buff *skb,
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struct netlink_callback *cb)
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{
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struct nlattr *attrs[NCSI_ATTR_MAX];
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struct ncsi_package *np, *package;
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struct ncsi_dev_priv *ndp;
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unsigned int package_id;
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struct nlattr *attr;
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void *hdr;
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int rc;
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rc = genlmsg_parse(cb->nlh, &ncsi_genl_family, attrs, NCSI_ATTR_MAX,
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ncsi_genl_policy, NULL);
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if (rc)
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return rc;
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if (!attrs[NCSI_ATTR_IFINDEX])
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return -EINVAL;
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ndp = ndp_from_ifindex(get_net(sock_net(skb->sk)),
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nla_get_u32(attrs[NCSI_ATTR_IFINDEX]));
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if (!ndp)
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return -ENODEV;
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package_id = cb->args[0];
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package = NULL;
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NCSI_FOR_EACH_PACKAGE(ndp, np)
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if (np->id == package_id)
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package = np;
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if (!package)
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return 0; /* done */
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hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
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&ncsi_genl_family, 0, NCSI_CMD_PKG_INFO);
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if (!hdr) {
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rc = -EMSGSIZE;
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goto err;
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}
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attr = nla_nest_start(skb, NCSI_ATTR_PACKAGE_LIST);
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rc = ncsi_write_package_info(skb, ndp, package->id);
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if (rc) {
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nla_nest_cancel(skb, attr);
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goto err;
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}
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nla_nest_end(skb, attr);
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genlmsg_end(skb, hdr);
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cb->args[0] = package_id + 1;
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return skb->len;
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err:
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genlmsg_cancel(skb, hdr);
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return rc;
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}
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static int ncsi_set_interface_nl(struct sk_buff *msg, struct genl_info *info)
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{
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struct ncsi_package *np, *package;
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struct ncsi_channel *nc, *channel;
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u32 package_id, channel_id;
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struct ncsi_dev_priv *ndp;
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unsigned long flags;
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if (!info || !info->attrs)
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return -EINVAL;
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if (!info->attrs[NCSI_ATTR_IFINDEX])
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return -EINVAL;
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if (!info->attrs[NCSI_ATTR_PACKAGE_ID])
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return -EINVAL;
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ndp = ndp_from_ifindex(get_net(sock_net(msg->sk)),
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nla_get_u32(info->attrs[NCSI_ATTR_IFINDEX]));
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if (!ndp)
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return -ENODEV;
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package_id = nla_get_u32(info->attrs[NCSI_ATTR_PACKAGE_ID]);
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package = NULL;
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spin_lock_irqsave(&ndp->lock, flags);
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NCSI_FOR_EACH_PACKAGE(ndp, np)
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if (np->id == package_id)
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package = np;
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if (!package) {
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/* The user has set a package that does not exist */
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return -ERANGE;
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}
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channel = NULL;
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if (!info->attrs[NCSI_ATTR_CHANNEL_ID]) {
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/* Allow any channel */
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channel_id = NCSI_RESERVED_CHANNEL;
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} else {
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channel_id = nla_get_u32(info->attrs[NCSI_ATTR_CHANNEL_ID]);
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NCSI_FOR_EACH_CHANNEL(package, nc)
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if (nc->id == channel_id)
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channel = nc;
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}
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if (channel_id != NCSI_RESERVED_CHANNEL && !channel) {
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/* The user has set a channel that does not exist on this
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* package
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*/
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netdev_info(ndp->ndev.dev, "NCSI: Channel %u does not exist!\n",
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channel_id);
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return -ERANGE;
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}
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ndp->force_package = package;
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ndp->force_channel = channel;
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spin_unlock_irqrestore(&ndp->lock, flags);
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netdev_info(ndp->ndev.dev, "Set package 0x%x, channel 0x%x%s as preferred\n",
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package_id, channel_id,
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channel_id == NCSI_RESERVED_CHANNEL ? " (any)" : "");
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/* Bounce the NCSI channel to set changes */
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ncsi_stop_dev(&ndp->ndev);
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ncsi_start_dev(&ndp->ndev);
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return 0;
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}
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static int ncsi_clear_interface_nl(struct sk_buff *msg, struct genl_info *info)
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{
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struct ncsi_dev_priv *ndp;
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unsigned long flags;
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if (!info || !info->attrs)
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return -EINVAL;
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if (!info->attrs[NCSI_ATTR_IFINDEX])
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return -EINVAL;
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ndp = ndp_from_ifindex(get_net(sock_net(msg->sk)),
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nla_get_u32(info->attrs[NCSI_ATTR_IFINDEX]));
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if (!ndp)
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return -ENODEV;
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/* Clear any override */
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spin_lock_irqsave(&ndp->lock, flags);
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ndp->force_package = NULL;
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ndp->force_channel = NULL;
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spin_unlock_irqrestore(&ndp->lock, flags);
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netdev_info(ndp->ndev.dev, "NCSI: Cleared preferred package/channel\n");
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/* Bounce the NCSI channel to set changes */
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ncsi_stop_dev(&ndp->ndev);
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ncsi_start_dev(&ndp->ndev);
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return 0;
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}
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|
|
||
|
|
static const struct genl_ops ncsi_ops[] = {
|
||
|
|
{
|
||
|
|
.cmd = NCSI_CMD_PKG_INFO,
|
||
|
|
.policy = ncsi_genl_policy,
|
||
|
|
.doit = ncsi_pkg_info_nl,
|
||
|
|
.dumpit = ncsi_pkg_info_all_nl,
|
||
|
|
.flags = 0,
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.cmd = NCSI_CMD_SET_INTERFACE,
|
||
|
|
.policy = ncsi_genl_policy,
|
||
|
|
.doit = ncsi_set_interface_nl,
|
||
|
|
.flags = GENL_ADMIN_PERM,
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.cmd = NCSI_CMD_CLEAR_INTERFACE,
|
||
|
|
.policy = ncsi_genl_policy,
|
||
|
|
.doit = ncsi_clear_interface_nl,
|
||
|
|
.flags = GENL_ADMIN_PERM,
|
||
|
|
},
|
||
|
|
};
|
||
|
|
|
||
|
|
static struct genl_family ncsi_genl_family __ro_after_init = {
|
||
|
|
.name = "NCSI",
|
||
|
|
.version = 0,
|
||
|
|
.maxattr = NCSI_ATTR_MAX,
|
||
|
|
.module = THIS_MODULE,
|
||
|
|
.ops = ncsi_ops,
|
||
|
|
.n_ops = ARRAY_SIZE(ncsi_ops),
|
||
|
|
};
|
||
|
|
|
||
|
|
int ncsi_init_netlink(struct net_device *dev)
|
||
|
|
{
|
||
|
|
int rc;
|
||
|
|
|
||
|
|
rc = genl_register_family(&ncsi_genl_family);
|
||
|
|
if (rc)
|
||
|
|
netdev_err(dev, "ncsi: failed to register netlink family\n");
|
||
|
|
|
||
|
|
return rc;
|
||
|
|
}
|
||
|
|
|
||
|
|
int ncsi_unregister_netlink(struct net_device *dev)
|
||
|
|
{
|
||
|
|
int rc;
|
||
|
|
|
||
|
|
rc = genl_unregister_family(&ncsi_genl_family);
|
||
|
|
if (rc)
|
||
|
|
netdev_err(dev, "ncsi: failed to unregister netlink family\n");
|
||
|
|
|
||
|
|
return rc;
|
||
|
|
}
|