cfg80211: Add support for aborting an ongoing scan
Implement new functionality for aborting an ongoing scan. Add NL80211_CMD_ABORT_SCAN to the nl80211 interface. After aborting the scan, driver shall provide the scan status by calling cfg80211_scan_done(). Reviewed-by: Jouni Malinen <jouni@qca.qualcomm.com> Signed-off-by: Vidyullatha Kanchanapally <vkanchan@qti.qualcomm.com> Signed-off-by: Sunil Dutt <usdutt@qti.qualcomm.com> [change command to take wdev instead of netdev so that it can be used on p2p-device scans] Signed-off-by: Johannes Berg <johannes.berg@intel.com> Git-commit: 91d3ab46730379e89e1e908c6f62fbcadb3d8f08 Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git Change-Id: I071841cfea5b0da72f70032d0d99b05678d3d747 CRs-fixed: 930859
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@ -1980,6 +1980,8 @@ struct cfg80211_qos_map {
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* the driver, and will be valid until passed to cfg80211_scan_done().
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* For scan results, call cfg80211_inform_bss(); you can call this outside
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* the scan/scan_done bracket too.
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* @abort_scan: Tell the driver to abort an ongoing scan. The driver shall
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* indicate the status of the scan through cfg80211_scan_done().
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*
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* @auth: Request to authenticate with the specified peer
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* @assoc: Request to (re)associate with the specified peer
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@ -2209,6 +2211,7 @@ struct cfg80211_ops {
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int (*scan)(struct wiphy *wiphy,
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struct cfg80211_scan_request *request);
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void (*abort_scan)(struct wiphy *wiphy, struct wireless_dev *wdev);
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int (*auth)(struct wiphy *wiphy, struct net_device *dev,
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struct cfg80211_auth_request *req);
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@ -690,6 +690,10 @@
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* QoS mapping is relevant for IP packets, it is only valid during an
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* association. This is cleared on disassociation and AP restart.
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*
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* @NL80211_CMD_ABORT_SCAN: Stop an ongoing scan. Returns -ENOENT if a scan is
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* not running. The driver indicates the status of the scan through
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* cfg80211_scan_done().
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*
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* @NL80211_CMD_MAX: highest used command number
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* @__NL80211_CMD_AFTER_LAST: internal use
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*/
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@ -861,6 +865,8 @@ enum nl80211_commands {
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NL80211_CMD_SET_QOS_MAP,
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NL80211_CMD_ABORT_SCAN,
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/* add new commands above here */
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/* used to define NL80211_CMD_MAX below */
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@ -5456,6 +5456,21 @@ static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
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return err;
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}
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static int nl80211_abort_scan(struct sk_buff *skb, struct genl_info *info)
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{
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struct cfg80211_registered_device *rdev = info->user_ptr[0];
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struct wireless_dev *wdev = info->user_ptr[1];
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if (!rdev->ops->abort_scan)
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return -EOPNOTSUPP;
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if (!rdev->scan_req)
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return -ENOENT;
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rdev_abort_scan(rdev, wdev);
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return 0;
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}
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static int nl80211_start_sched_scan(struct sk_buff *skb,
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struct genl_info *info)
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{
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@ -9064,6 +9079,14 @@ static struct genl_ops nl80211_ops[] = {
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.internal_flags = NL80211_FLAG_NEED_WDEV_UP |
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NL80211_FLAG_NEED_RTNL,
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},
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{
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.cmd = NL80211_CMD_ABORT_SCAN,
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.doit = nl80211_abort_scan,
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.policy = nl80211_policy,
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.flags = GENL_ADMIN_PERM,
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.internal_flags = NL80211_FLAG_NEED_WDEV_UP |
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NL80211_FLAG_NEED_RTNL,
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},
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{
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.cmd = NL80211_CMD_GET_SCAN,
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.policy = nl80211_policy,
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@ -379,6 +379,14 @@ static inline int rdev_scan(struct cfg80211_registered_device *rdev,
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return ret;
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}
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static inline void rdev_abort_scan(struct cfg80211_registered_device *rdev,
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struct wireless_dev *wdev)
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{
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trace_rdev_abort_scan(&rdev->wiphy, wdev);
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rdev->ops->abort_scan(&rdev->wiphy, wdev);
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trace_rdev_return_void(&rdev->wiphy);
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}
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static inline int rdev_auth(struct cfg80211_registered_device *rdev,
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struct net_device *dev,
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struct cfg80211_auth_request *req)
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@ -2589,6 +2589,10 @@ TRACE_EVENT(cfg80211_ft_event,
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WIPHY_PR_ARG, NETDEV_PR_ARG, MAC_PR_ARG(target_ap))
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);
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DEFINE_EVENT(wiphy_wdev_evt, rdev_abort_scan,
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TP_PROTO(struct wiphy *wiphy, struct wireless_dev *wdev),
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TP_ARGS(wiphy, wdev)
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);
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#endif /* !__RDEV_OPS_TRACE || TRACE_HEADER_MULTI_READ */
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#undef TRACE_INCLUDE_PATH
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