From 91d3ab46730379e89e1e908c6f62fbcadb3d8f08 Mon Sep 17 00:00:00 2001 From: Vidyullatha Kanchanapally Date: Fri, 30 Oct 2015 19:14:49 +0530 Subject: 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 Signed-off-by: Vidyullatha Kanchanapally Signed-off-by: Sunil Dutt [change command to take wdev instead of netdev so that it can be used on p2p-device scans] Signed-off-by: Johannes Berg --- net/wireless/nl80211.c | 26 ++++++++++++++++++++++++++ net/wireless/rdev-ops.h | 8 ++++++++ net/wireless/trace.h | 4 ++++ 3 files changed, 38 insertions(+) (limited to 'net') diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 41e57d0c4d43..67e7b531db79 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -5997,6 +5997,24 @@ static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info) return err; } +static int nl80211_abort_scan(struct sk_buff *skb, struct genl_info *info) +{ + struct cfg80211_registered_device *rdev = info->user_ptr[0]; + struct wireless_dev *wdev = info->user_ptr[1]; + + if (!rdev->ops->abort_scan) + return -EOPNOTSUPP; + + if (rdev->scan_msg) + return 0; + + if (!rdev->scan_req) + return -ENOENT; + + rdev_abort_scan(rdev, wdev); + return 0; +} + static int nl80211_parse_sched_scan_plans(struct wiphy *wiphy, int n_plans, struct cfg80211_sched_scan_request *request, @@ -10944,6 +10962,14 @@ static const struct genl_ops nl80211_ops[] = { .internal_flags = NL80211_FLAG_NEED_WDEV_UP | NL80211_FLAG_NEED_RTNL, }, + { + .cmd = NL80211_CMD_ABORT_SCAN, + .doit = nl80211_abort_scan, + .policy = nl80211_policy, + .flags = GENL_ADMIN_PERM, + .internal_flags = NL80211_FLAG_NEED_WDEV_UP | + NL80211_FLAG_NEED_RTNL, + }, { .cmd = NL80211_CMD_GET_SCAN, .policy = nl80211_policy, diff --git a/net/wireless/rdev-ops.h b/net/wireless/rdev-ops.h index b8cc594d409d..8ae0c04f9fc7 100644 --- a/net/wireless/rdev-ops.h +++ b/net/wireless/rdev-ops.h @@ -427,6 +427,14 @@ static inline int rdev_scan(struct cfg80211_registered_device *rdev, return ret; } +static inline void rdev_abort_scan(struct cfg80211_registered_device *rdev, + struct wireless_dev *wdev) +{ + trace_rdev_abort_scan(&rdev->wiphy, wdev); + rdev->ops->abort_scan(&rdev->wiphy, wdev); + trace_rdev_return_void(&rdev->wiphy); +} + static inline int rdev_auth(struct cfg80211_registered_device *rdev, struct net_device *dev, struct cfg80211_auth_request *req) diff --git a/net/wireless/trace.h b/net/wireless/trace.h index 5b9139e53199..09b242b09bed 100644 --- a/net/wireless/trace.h +++ b/net/wireless/trace.h @@ -2917,6 +2917,10 @@ TRACE_EVENT(rdev_set_coalesce, WIPHY_PR_ARG, __entry->n_rules) ); +DEFINE_EVENT(wiphy_wdev_evt, rdev_abort_scan, + TP_PROTO(struct wiphy *wiphy, struct wireless_dev *wdev), + TP_ARGS(wiphy, wdev) +); #endif /* !__RDEV_OPS_TRACE || TRACE_HEADER_MULTI_READ */ #undef TRACE_INCLUDE_PATH -- cgit v1.2.3-59-g8ed1b