void cfg80211_nan_ulw_update(struct wireless_dev *wdev,
const u8 *ulw, size_t ulw_len, gfp_t gfp);
+/**
+ * cfg80211_nan_channel_evac - Notify user space about NAN channel evacuation
+ * @wdev: Pointer to the wireless device structure
+ * @chandef: Pointer to the channel definition of the NAN channel that was
+ * evacuated
+ * @gfp: Memory allocation flags
+ *
+ * This function is used by drivers to notify user space when a NAN
+ * channel has been evacuated (i.e. ULWed) due to channel resource conflicts
+ * with other interfaces.
+ * This can happen when another interface sharing the channel resource with NAN
+ * needs to move to a different channel (e.g. due to channel switch or link
+ * switch). User space may reconfigure the local schedule to exclude the
+ * evacuated channel.
+ */
+void cfg80211_nan_channel_evac(struct wireless_dev *wdev,
+ const struct cfg80211_chan_def *chandef,
+ gfp_t gfp);
+
#ifdef CONFIG_CFG80211_DEBUGFS
/**
* wiphy_locked_debugfs_read - do a locked read in debugfs
* with the updated ULW blob of the device. User space can use this blob
* to attach to frames sent to peers. This notification contains
* %NL80211_ATTR_NAN_ULW with the ULW blob.
+ * @NL80211_CMD_NAN_CHANNEL_EVAC: Notification to indicate that a NAN
+ * channel has been evacuated due to resource conflicts with other
+ * interfaces. This can happen when another interface sharing the channel
+ * resource with NAN needs to move to a different channel (e.g., channel
+ * switch or link switch on a BSS interface).
+ * The notification contains %NL80211_ATTR_NAN_CHANNEL attribute
+ * identifying the evacuated channel.
+ * User space may reconfigure the local schedule in response to this
+ * notification.
* @NL80211_CMD_MAX: highest used command number
* @__NL80211_CMD_AFTER_LAST: internal use
*/
NL80211_CMD_NAN_SET_PEER_SCHED,
NL80211_CMD_NAN_ULW_UPDATE,
+
+ NL80211_CMD_NAN_CHANNEL_EVAC,
+
/* add new commands above here */
/* used to define NL80211_CMD_MAX below */
* Currently only supported in mac80211 drivers.
* @NL80211_ATTR_NAN_CHANNEL: This is a nested attribute. There can be multiple
* attributes of this type, each one represents a channel definition and
- * consists of top-level attributes like %NL80211_ATTR_WIPHY_FREQ. Must
- * contain %NL80211_ATTR_NAN_CHANNEL_ENTRY and
- * %NL80211_ATTR_NAN_RX_NSS.
- * This attribute is used with %NL80211_CMD_NAN_SET_LOCAL_SCHED to specify
+ * consists of top-level attributes like %NL80211_ATTR_WIPHY_FREQ.
+ * When used with %NL80211_CMD_NAN_SET_LOCAL_SCHED, it specifies
* the channel definitions on which the radio needs to operate during
* specific time slots. All of the channel definitions should be mutually
- * incompatible.
- * This is also used with %NL80211_CMD_NAN_SET_PEER_SCHED to configure the
+ * incompatible. With this command, %NL80211_ATTR_NAN_CHANNEL_ENTRY and
+ * %NL80211_ATTR_NAN_RX_NSS are mandatory.
+ * When used with %NL80211_CMD_NAN_SET_PEER_SCHED, it configures the
* peer NAN channels. In that case, the channel definitions can be
* compatible to each other, or even identical just with different RX NSS.
+ * With this command, %NL80211_ATTR_NAN_CHANNEL_ENTRY and
+ * %NL80211_ATTR_NAN_RX_NSS are mandatory.
* The number of channels should fit the current configuration of channels
* and the possible interface combinations.
* If an existing NAN channel is changed but the chandef isn't, the
* channel entry must also remain unchanged.
+ * When used with %NL80211_CMD_NAN_CHANNEL_EVAC, this identifies the
+ * channels that were evacuated.
* @NL80211_ATTR_NAN_CHANNEL_ENTRY: a byte array of 6 bytes. contains the
* Channel Entry as defined in Wi-Fi Aware (TM) 4.0 specification Table
* 100 (Channel Entry format for the NAN Availability attribute).
}
EXPORT_SYMBOL(cfg80211_nan_ulw_update);
+void cfg80211_nan_channel_evac(struct wireless_dev *wdev,
+ const struct cfg80211_chan_def *chandef,
+ gfp_t gfp)
+{
+ struct wiphy *wiphy = wdev->wiphy;
+ struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
+ struct sk_buff *msg;
+ struct nlattr *chan_attr;
+ void *hdr;
+
+ trace_cfg80211_nan_channel_evac(wiphy, wdev, chandef);
+
+ if (!wdev->owner_nlportid)
+ return;
+
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
+ if (!msg)
+ return;
+
+ hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NAN_CHANNEL_EVAC);
+ if (!hdr)
+ goto nla_put_failure;
+
+ if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
+ nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
+ NL80211_ATTR_PAD))
+ goto nla_put_failure;
+
+ chan_attr = nla_nest_start(msg, NL80211_ATTR_NAN_CHANNEL);
+ if (!chan_attr)
+ goto nla_put_failure;
+
+ if (nl80211_send_chandef(msg, chandef))
+ goto nla_put_failure;
+
+ nla_nest_end(msg, chan_attr);
+
+ genlmsg_end(msg, hdr);
+
+ genlmsg_unicast(wiphy_net(wiphy), msg, wdev->owner_nlportid);
+
+ return;
+
+ nla_put_failure:
+ nlmsg_free(msg);
+}
+EXPORT_SYMBOL(cfg80211_nan_channel_evac);
+
/* initialisation/exit functions */
int __init nl80211_init(void)
__print_array(__get_dynamic_array(ulw),
__get_dynamic_array_len(ulw), 1))
);
+
+TRACE_EVENT(cfg80211_nan_channel_evac,
+ TP_PROTO(struct wiphy *wiphy, struct wireless_dev *wdev,
+ const struct cfg80211_chan_def *chandef),
+ TP_ARGS(wiphy, wdev, chandef),
+ TP_STRUCT__entry(
+ WDEV_ENTRY
+ WIPHY_ENTRY
+ CHAN_DEF_ENTRY
+ ),
+ TP_fast_assign(
+ WDEV_ASSIGN;
+ WIPHY_ASSIGN;
+ CHAN_DEF_ASSIGN(chandef);
+ ),
+ TP_printk(WDEV_PR_FMT ", " WIPHY_PR_FMT ", " CHAN_DEF_PR_FMT,
+ WDEV_PR_ARG, WIPHY_PR_ARG, CHAN_DEF_PR_ARG)
+);
#endif /* !__RDEV_OPS_TRACE || TRACE_HEADER_MULTI_READ */
#undef TRACE_INCLUDE_PATH
projects / thirdparty / kernel / linux.git / commitdiff
