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346 lines
7.6 KiB
346 lines
7.6 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Netlink interface for IEEE 802.15.4 stack |
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* |
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* Copyright 2007, 2008 Siemens AG |
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* |
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* Written by: |
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* Sergey Lapin <[email protected]> |
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* Dmitry Eremin-Solenikov <[email protected]> |
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* Maxim Osipov <[email protected]> |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/slab.h> |
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#include <linux/if_arp.h> |
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#include <net/netlink.h> |
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#include <net/genetlink.h> |
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#include <net/cfg802154.h> |
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#include <net/af_ieee802154.h> |
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#include <net/ieee802154_netdev.h> |
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#include <net/rtnetlink.h> /* for rtnl_{un,}lock */ |
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#include <linux/nl802154.h> |
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#include "ieee802154.h" |
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#include "rdev-ops.h" |
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#include "core.h" |
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static int ieee802154_nl_fill_phy(struct sk_buff *msg, u32 portid, |
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u32 seq, int flags, struct wpan_phy *phy) |
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{ |
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void *hdr; |
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int i, pages = 0; |
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uint32_t *buf = kcalloc(32, sizeof(uint32_t), GFP_KERNEL); |
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pr_debug("%s\n", __func__); |
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if (!buf) |
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return -EMSGSIZE; |
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hdr = genlmsg_put(msg, 0, seq, &nl802154_family, flags, |
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IEEE802154_LIST_PHY); |
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if (!hdr) |
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goto out; |
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rtnl_lock(); |
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if (nla_put_string(msg, IEEE802154_ATTR_PHY_NAME, wpan_phy_name(phy)) || |
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nla_put_u8(msg, IEEE802154_ATTR_PAGE, phy->current_page) || |
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nla_put_u8(msg, IEEE802154_ATTR_CHANNEL, phy->current_channel)) |
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goto nla_put_failure; |
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for (i = 0; i < 32; i++) { |
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if (phy->supported.channels[i]) |
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buf[pages++] = phy->supported.channels[i] | (i << 27); |
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} |
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if (pages && |
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nla_put(msg, IEEE802154_ATTR_CHANNEL_PAGE_LIST, |
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pages * sizeof(uint32_t), buf)) |
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goto nla_put_failure; |
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rtnl_unlock(); |
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kfree(buf); |
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genlmsg_end(msg, hdr); |
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return 0; |
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nla_put_failure: |
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rtnl_unlock(); |
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genlmsg_cancel(msg, hdr); |
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out: |
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kfree(buf); |
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return -EMSGSIZE; |
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} |
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int ieee802154_list_phy(struct sk_buff *skb, struct genl_info *info) |
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{ |
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/* Request for interface name, index, type, IEEE address, |
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* PAN Id, short address |
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*/ |
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struct sk_buff *msg; |
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struct wpan_phy *phy; |
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const char *name; |
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int rc = -ENOBUFS; |
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pr_debug("%s\n", __func__); |
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if (!info->attrs[IEEE802154_ATTR_PHY_NAME]) |
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return -EINVAL; |
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name = nla_data(info->attrs[IEEE802154_ATTR_PHY_NAME]); |
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if (name[nla_len(info->attrs[IEEE802154_ATTR_PHY_NAME]) - 1] != '\0') |
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return -EINVAL; /* phy name should be null-terminated */ |
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phy = wpan_phy_find(name); |
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if (!phy) |
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return -ENODEV; |
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msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
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if (!msg) |
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goto out_dev; |
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rc = ieee802154_nl_fill_phy(msg, info->snd_portid, info->snd_seq, |
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0, phy); |
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if (rc < 0) |
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goto out_free; |
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wpan_phy_put(phy); |
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return genlmsg_reply(msg, info); |
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out_free: |
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nlmsg_free(msg); |
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out_dev: |
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wpan_phy_put(phy); |
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return rc; |
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} |
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struct dump_phy_data { |
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struct sk_buff *skb; |
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struct netlink_callback *cb; |
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int idx, s_idx; |
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}; |
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static int ieee802154_dump_phy_iter(struct wpan_phy *phy, void *_data) |
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{ |
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int rc; |
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struct dump_phy_data *data = _data; |
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pr_debug("%s\n", __func__); |
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if (data->idx++ < data->s_idx) |
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return 0; |
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rc = ieee802154_nl_fill_phy(data->skb, |
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NETLINK_CB(data->cb->skb).portid, |
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data->cb->nlh->nlmsg_seq, |
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NLM_F_MULTI, |
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phy); |
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if (rc < 0) { |
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data->idx--; |
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return rc; |
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} |
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return 0; |
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} |
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int ieee802154_dump_phy(struct sk_buff *skb, struct netlink_callback *cb) |
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{ |
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struct dump_phy_data data = { |
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.cb = cb, |
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.skb = skb, |
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.s_idx = cb->args[0], |
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.idx = 0, |
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}; |
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pr_debug("%s\n", __func__); |
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wpan_phy_for_each(ieee802154_dump_phy_iter, &data); |
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cb->args[0] = data.idx; |
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return skb->len; |
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} |
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int ieee802154_add_iface(struct sk_buff *skb, struct genl_info *info) |
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{ |
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struct sk_buff *msg; |
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struct wpan_phy *phy; |
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const char *name; |
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const char *devname; |
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int rc = -ENOBUFS; |
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struct net_device *dev; |
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int type = __IEEE802154_DEV_INVALID; |
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unsigned char name_assign_type; |
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pr_debug("%s\n", __func__); |
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if (!info->attrs[IEEE802154_ATTR_PHY_NAME]) |
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return -EINVAL; |
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name = nla_data(info->attrs[IEEE802154_ATTR_PHY_NAME]); |
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if (name[nla_len(info->attrs[IEEE802154_ATTR_PHY_NAME]) - 1] != '\0') |
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return -EINVAL; /* phy name should be null-terminated */ |
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if (info->attrs[IEEE802154_ATTR_DEV_NAME]) { |
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devname = nla_data(info->attrs[IEEE802154_ATTR_DEV_NAME]); |
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if (devname[nla_len(info->attrs[IEEE802154_ATTR_DEV_NAME]) - 1] |
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!= '\0') |
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return -EINVAL; /* phy name should be null-terminated */ |
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name_assign_type = NET_NAME_USER; |
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} else { |
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devname = "wpan%d"; |
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name_assign_type = NET_NAME_ENUM; |
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} |
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if (strlen(devname) >= IFNAMSIZ) |
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return -ENAMETOOLONG; |
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phy = wpan_phy_find(name); |
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if (!phy) |
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return -ENODEV; |
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msg = ieee802154_nl_new_reply(info, 0, IEEE802154_ADD_IFACE); |
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if (!msg) |
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goto out_dev; |
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if (info->attrs[IEEE802154_ATTR_HW_ADDR] && |
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nla_len(info->attrs[IEEE802154_ATTR_HW_ADDR]) != |
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IEEE802154_ADDR_LEN) { |
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rc = -EINVAL; |
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goto nla_put_failure; |
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} |
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if (info->attrs[IEEE802154_ATTR_DEV_TYPE]) { |
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type = nla_get_u8(info->attrs[IEEE802154_ATTR_DEV_TYPE]); |
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if (type >= __IEEE802154_DEV_MAX) { |
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rc = -EINVAL; |
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goto nla_put_failure; |
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} |
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} |
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dev = rdev_add_virtual_intf_deprecated(wpan_phy_to_rdev(phy), devname, |
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name_assign_type, type); |
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if (IS_ERR(dev)) { |
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rc = PTR_ERR(dev); |
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goto nla_put_failure; |
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} |
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dev_hold(dev); |
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if (info->attrs[IEEE802154_ATTR_HW_ADDR]) { |
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struct sockaddr addr; |
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addr.sa_family = ARPHRD_IEEE802154; |
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nla_memcpy(&addr.sa_data, info->attrs[IEEE802154_ATTR_HW_ADDR], |
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IEEE802154_ADDR_LEN); |
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/* strangely enough, some callbacks (inetdev_event) from |
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* dev_set_mac_address require RTNL_LOCK |
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*/ |
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rtnl_lock(); |
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rc = dev_set_mac_address(dev, &addr, NULL); |
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rtnl_unlock(); |
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if (rc) |
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goto dev_unregister; |
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} |
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if (nla_put_string(msg, IEEE802154_ATTR_PHY_NAME, wpan_phy_name(phy)) || |
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nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, dev->name)) { |
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rc = -EMSGSIZE; |
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goto nla_put_failure; |
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} |
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dev_put(dev); |
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wpan_phy_put(phy); |
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return ieee802154_nl_reply(msg, info); |
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dev_unregister: |
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rtnl_lock(); /* del_iface must be called with RTNL lock */ |
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rdev_del_virtual_intf_deprecated(wpan_phy_to_rdev(phy), dev); |
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dev_put(dev); |
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rtnl_unlock(); |
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nla_put_failure: |
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nlmsg_free(msg); |
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out_dev: |
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wpan_phy_put(phy); |
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return rc; |
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} |
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int ieee802154_del_iface(struct sk_buff *skb, struct genl_info *info) |
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{ |
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struct sk_buff *msg; |
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struct wpan_phy *phy; |
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const char *name; |
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int rc; |
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struct net_device *dev; |
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pr_debug("%s\n", __func__); |
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if (!info->attrs[IEEE802154_ATTR_DEV_NAME]) |
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return -EINVAL; |
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name = nla_data(info->attrs[IEEE802154_ATTR_DEV_NAME]); |
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if (name[nla_len(info->attrs[IEEE802154_ATTR_DEV_NAME]) - 1] != '\0') |
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return -EINVAL; /* name should be null-terminated */ |
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rc = -ENODEV; |
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dev = dev_get_by_name(genl_info_net(info), name); |
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if (!dev) |
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return rc; |
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if (dev->type != ARPHRD_IEEE802154) |
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goto out; |
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phy = dev->ieee802154_ptr->wpan_phy; |
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BUG_ON(!phy); |
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get_device(&phy->dev); |
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rc = -EINVAL; |
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/* phy name is optional, but should be checked if it's given */ |
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if (info->attrs[IEEE802154_ATTR_PHY_NAME]) { |
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struct wpan_phy *phy2; |
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const char *pname = |
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nla_data(info->attrs[IEEE802154_ATTR_PHY_NAME]); |
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if (pname[nla_len(info->attrs[IEEE802154_ATTR_PHY_NAME]) - 1] |
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!= '\0') |
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/* name should be null-terminated */ |
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goto out_dev; |
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phy2 = wpan_phy_find(pname); |
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if (!phy2) |
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goto out_dev; |
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if (phy != phy2) { |
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wpan_phy_put(phy2); |
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goto out_dev; |
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} |
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} |
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rc = -ENOBUFS; |
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msg = ieee802154_nl_new_reply(info, 0, IEEE802154_DEL_IFACE); |
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if (!msg) |
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goto out_dev; |
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rtnl_lock(); |
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rdev_del_virtual_intf_deprecated(wpan_phy_to_rdev(phy), dev); |
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/* We don't have device anymore */ |
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dev_put(dev); |
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dev = NULL; |
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rtnl_unlock(); |
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if (nla_put_string(msg, IEEE802154_ATTR_PHY_NAME, wpan_phy_name(phy)) || |
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nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, name)) |
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goto nla_put_failure; |
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wpan_phy_put(phy); |
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return ieee802154_nl_reply(msg, info); |
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nla_put_failure: |
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nlmsg_free(msg); |
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out_dev: |
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wpan_phy_put(phy); |
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out: |
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dev_put(dev); |
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return rc; |
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}
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