On 16-9-2016 10:33, Luca Coelho wrote:
> From: Ayala Beker <ayala.beker@xxxxxxxxx>
>
> Provide a function that reports NAN DE function termination. The function
> may be terminated due to one of the following reasons: user request,
> ttl expiration or failure.
> If the NAN instance is tied to the owner, the notification will be
> sent to the socket that started the NAN interface only
So the driver is supposed to use this function from the .rm_nan_func
callback (or .del_nan_func). How should the driver use this together
with cfg80211_free_nan_func() function.
> Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@xxxxxxxxx>
> Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@xxxxxxxxx>
> Signed-off-by: Luca Coelho <luciano.coelho@xxxxxxxxx>
> ---
> include/net/cfg80211.h | 16 ++++++++++++
> include/uapi/linux/nl80211.h | 15 ++++++++++++
> net/wireless/nl80211.c | 58 ++++++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 89 insertions(+)
>
> diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
> index a08d7da..81770d6 100644
> --- a/include/net/cfg80211.h
> +++ b/include/net/cfg80211.h
> @@ -5676,6 +5676,22 @@ struct cfg80211_nan_match_params {
> void cfg80211_nan_match(struct wireless_dev *wdev,
> struct cfg80211_nan_match_params *match, gfp_t gfp);
>
> +/**
> + * cfg80211_nan_func_terminated - notify about NAN function termination.
> + *
> + * @wdev: the wireless device reporting the match
> + * @inst_id: the local instance id
> + * @reason: termination reason (one of the NL80211_NAN_FUNC_TERM_REASON_*)
> + * @cookie: unique NAN function identifier
> + * @gfp: allocation flags
> + *
> + * This function reports that the a NAN function is terminated.
> + */
> +void cfg80211_nan_func_terminated(struct wireless_dev *wdev,
> + u8 inst_id,
> + enum nl80211_nan_func_term_reason reason,
> + u64 cookie, gfp_t gfp);
> +
> /* ethtool helper */
> void cfg80211_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info);
>
> diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h
> index badb4a6..fd86be6 100644
> --- a/include/uapi/linux/nl80211.h
> +++ b/include/uapi/linux/nl80211.h
> @@ -4978,6 +4978,21 @@ enum nl80211_nan_publish_type {
> NL80211_NAN_UNSOLICITED_PUBLISH = 1 << 1,
> };
>
> +/**
> + * enum nl80211_nan_func_term_reason - NAN functions termination reason
> + *
> + * Defines termination reasons of a NAN function
> + *
> + * @NL80211_NAN_FUNC_TERM_REASON_USER_REQUEST: requested by user
> + * @NL80211_NAN_FUNC_TERM_REASON_TTL_EXPIRED: timeout
> + * @NL80211_NAN_FUNC_TERM_REASON_ERROR: errored
> + */
> +enum nl80211_nan_func_term_reason {
> + NL80211_NAN_FUNC_TERM_REASON_USER_REQUEST,
> + NL80211_NAN_FUNC_TERM_REASON_TTL_EXPIRED,
> + NL80211_NAN_FUNC_TERM_REASON_ERROR,
> +};
> +
> #define NL80211_NAN_FUNC_SERVICE_ID_LEN 6
> #define NL80211_NAN_FUNC_SERVICE_SPEC_INFO_MAX_LEN 0xff
> #define NL80211_NAN_FUNC_SRF_MAX_LEN 0xff
> diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
> index 4d37717..f817105 100644
> --- a/net/wireless/nl80211.c
> +++ b/net/wireless/nl80211.c
> @@ -10945,6 +10945,64 @@ nla_put_failure:
> }
> EXPORT_SYMBOL(cfg80211_nan_match);
>
> +void cfg80211_nan_func_terminated(struct wireless_dev *wdev,
> + u8 inst_id,
> + enum nl80211_nan_func_term_reason reason,
> + u64 cookie, gfp_t gfp)
> +{
> + struct wiphy *wiphy = wdev->wiphy;
> + struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
> + struct sk_buff *msg;
> + struct nlattr *func_attr;
> + void *hdr;
> +
> + if (WARN_ON(!inst_id))
> + return;
> +
> + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
> + if (!msg)
> + return;
> +
> + hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_RM_NAN_FUNCTION);
> + if (!hdr) {
> + nlmsg_free(msg);
> + return;
> + }
> +
> + if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
> + (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
> + wdev->netdev->ifindex)) ||
> + nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
> + goto nla_put_failure;
> +
> + if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
> + goto nla_put_failure;
> +
> + func_attr = nla_nest_start(msg, NL80211_ATTR_NAN_FUNC);
> + if (!func_attr)
> + goto nla_put_failure;
> +
> + if (nla_put_u8(msg, NL80211_NAN_FUNC_INSTANCE_ID, inst_id) ||
> + nla_put_u8(msg, NL80211_NAN_FUNC_TERM_REASON, reason))
> + goto nla_put_failure;
> +
> + nla_nest_end(msg, func_attr);
> + genlmsg_end(msg, hdr);
> +
> + if (!wdev->owner_nlportid)
> + genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy),
> + msg, 0, NL80211_MCGRP_NAN, gfp);
> + else
> + genlmsg_unicast(wiphy_net(&rdev->wiphy), msg,
> + wdev->owner_nlportid);
> +
> + return;
> +
> +nla_put_failure:
> + nlmsg_free(msg);
> +}
> +EXPORT_SYMBOL(cfg80211_nan_func_terminated);
> +
> static int nl80211_get_protocol_features(struct sk_buff *skb,
> struct genl_info *info)
> {
>
