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https://github.com/torvalds/linux
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ieee802154: add wpan_dev dump support
This patch adds support for wpan_dev dump via nl802154 framework. Signed-off-by: Alexander Aring <alex.aring@gmail.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Alexander Aring
Marcel Holtmann
parent
ca20ce201c
commit
4b96aea0fc
1 changed files with 145 additions and 0 deletions
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@ -198,6 +198,8 @@ static const struct nla_policy nl802154_policy[NL802154_ATTR_MAX+1] = {
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.len = 20-1 },
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[NL802154_ATTR_IFINDEX] = { .type = NLA_U32 },
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[NL802154_ATTR_IFTYPE] = { .type = NLA_U32 },
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[NL802154_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
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[NL802154_ATTR_WPAN_DEV] = { .type = NLA_U64 },
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@ -209,6 +211,18 @@ static const struct nla_policy nl802154_policy[NL802154_ATTR_MAX+1] = {
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[NL802154_ATTR_CCA_MODE] = { .type = NLA_U8, },
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[NL802154_ATTR_SUPPORTED_CHANNEL] = { .type = NLA_U32, },
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[NL802154_ATTR_PAN_ID] = { .type = NLA_U16, },
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[NL802154_ATTR_EXTENDED_ADDR] = { .type = NLA_U64 },
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[NL802154_ATTR_SHORT_ADDR] = { .type = NLA_U16, },
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[NL802154_ATTR_MIN_BE] = { .type = NLA_U8, },
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[NL802154_ATTR_MAX_BE] = { .type = NLA_U8, },
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[NL802154_ATTR_MAX_CSMA_BACKOFFS] = { .type = NLA_U8, },
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[NL802154_ATTR_MAX_FRAME_RETRIES] = { .type = NLA_S8, },
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[NL802154_ATTR_LBT_MODE] = { .type = NLA_U8, },
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};
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/* message building helper */
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@ -414,6 +428,128 @@ static int nl802154_get_wpan_phy(struct sk_buff *skb, struct genl_info *info)
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return genlmsg_reply(msg, info);
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}
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static inline u64 wpan_dev_id(struct wpan_dev *wpan_dev)
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{
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return (u64)wpan_dev->identifier |
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((u64)wpan_phy_to_rdev(wpan_dev->wpan_phy)->wpan_phy_idx << 32);
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}
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static int
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nl802154_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
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struct cfg802154_registered_device *rdev,
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struct wpan_dev *wpan_dev)
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{
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struct net_device *dev = wpan_dev->netdev;
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void *hdr;
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hdr = nl802154hdr_put(msg, portid, seq, flags,
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NL802154_CMD_NEW_INTERFACE);
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if (!hdr)
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return -1;
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if (dev &&
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(nla_put_u32(msg, NL802154_ATTR_IFINDEX, dev->ifindex) ||
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nla_put_string(msg, NL802154_ATTR_IFNAME, dev->name)))
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goto nla_put_failure;
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if (nla_put_u32(msg, NL802154_ATTR_WPAN_PHY, rdev->wpan_phy_idx) ||
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nla_put_u32(msg, NL802154_ATTR_IFTYPE, wpan_dev->iftype) ||
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nla_put_u64(msg, NL802154_ATTR_WPAN_DEV, wpan_dev_id(wpan_dev)) ||
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nla_put_u32(msg, NL802154_ATTR_GENERATION,
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rdev->devlist_generation ^
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(cfg802154_rdev_list_generation << 2)))
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goto nla_put_failure;
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/* address settings */
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if (nla_put_le64(msg, NL802154_ATTR_EXTENDED_ADDR,
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wpan_dev->extended_addr) ||
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nla_put_le16(msg, NL802154_ATTR_SHORT_ADDR,
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wpan_dev->short_addr) ||
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nla_put_le16(msg, NL802154_ATTR_PAN_ID, wpan_dev->pan_id))
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goto nla_put_failure;
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/* ARET handling */
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if (nla_put_s8(msg, NL802154_ATTR_MAX_FRAME_RETRIES,
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wpan_dev->frame_retries) ||
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nla_put_u8(msg, NL802154_ATTR_MAX_BE, wpan_dev->max_be) ||
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nla_put_u8(msg, NL802154_ATTR_MAX_CSMA_BACKOFFS,
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wpan_dev->csma_retries) ||
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nla_put_u8(msg, NL802154_ATTR_MIN_BE, wpan_dev->min_be))
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goto nla_put_failure;
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/* listen before transmit */
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if (nla_put_u8(msg, NL802154_ATTR_LBT_MODE, wpan_dev->lbt))
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goto nla_put_failure;
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return genlmsg_end(msg, hdr);
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nla_put_failure:
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genlmsg_cancel(msg, hdr);
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return -EMSGSIZE;
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}
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static int
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nl802154_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
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{
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int wp_idx = 0;
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int if_idx = 0;
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int wp_start = cb->args[0];
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int if_start = cb->args[1];
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struct cfg802154_registered_device *rdev;
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struct wpan_dev *wpan_dev;
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rtnl_lock();
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list_for_each_entry(rdev, &cfg802154_rdev_list, list) {
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/* TODO netns compare */
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if (wp_idx < wp_start) {
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wp_idx++;
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continue;
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}
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if_idx = 0;
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list_for_each_entry(wpan_dev, &rdev->wpan_dev_list, list) {
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if (if_idx < if_start) {
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if_idx++;
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continue;
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}
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if (nl802154_send_iface(skb, NETLINK_CB(cb->skb).portid,
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cb->nlh->nlmsg_seq, NLM_F_MULTI,
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rdev, wpan_dev) < 0) {
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goto out;
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}
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if_idx++;
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}
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wp_idx++;
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}
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out:
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rtnl_unlock();
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cb->args[0] = wp_idx;
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cb->args[1] = if_idx;
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return skb->len;
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}
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static int nl802154_get_interface(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 cfg802154_registered_device *rdev = info->user_ptr[0];
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struct wpan_dev *wdev = info->user_ptr[1];
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msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
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if (!msg)
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return -ENOMEM;
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if (nl802154_send_iface(msg, info->snd_portid, info->snd_seq, 0,
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rdev, wdev) < 0) {
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nlmsg_free(msg);
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return -ENOBUFS;
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}
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return genlmsg_reply(msg, info);
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}
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#define NL802154_FLAG_NEED_WPAN_PHY 0x01
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#define NL802154_FLAG_NEED_NETDEV 0x02
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#define NL802154_FLAG_NEED_RTNL 0x04
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@ -515,6 +651,15 @@ static const struct genl_ops nl802154_ops[] = {
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.internal_flags = NL802154_FLAG_NEED_WPAN_PHY |
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NL802154_FLAG_NEED_RTNL,
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},
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{
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.cmd = NL802154_CMD_GET_INTERFACE,
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.doit = nl802154_get_interface,
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.dumpit = nl802154_dump_interface,
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.policy = nl802154_policy,
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/* can be retrieved by unprivileged users */
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.internal_flags = NL802154_FLAG_NEED_WPAN_DEV |
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NL802154_FLAG_NEED_RTNL,
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},
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};
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/* initialisation/exit functions */
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