scan.c revision 0c2bef4621c5feb5bda9068c9964b2e9acf57017
10a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg/* 25484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg * Scanning implementation 35484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg * 40a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi> 50a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg * Copyright 2004, Instant802 Networks, Inc. 60a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg * Copyright 2005, Devicescape Software, Inc. 70a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 80a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg * Copyright 2007, Michael Wu <flamingice@sourmilk.net> 90a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg * 100a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg * This program is free software; you can redistribute it and/or modify 110a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg * it under the terms of the GNU General Public License version 2 as 120a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg * published by the Free Software Foundation. 130a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg */ 140a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 150a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg#include <linux/if_arp.h> 16888d04dfbe7e09f930fdaafb257cce2c54c9c3f3Felix Fietkau#include <linux/etherdevice.h> 17078e1e60dd6c6b0d4bc8d58ccb80c008e8efc9ffJohannes Berg#include <linux/rtnetlink.h> 18e8db0be1245de16a6cc6365506abc392c3c212d4Jean Pihet#include <linux/pm_qos.h> 19df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa#include <net/sch_generic.h> 205a0e3ad6af8660be21ca98a971cd00f331318c05Tejun Heo#include <linux/slab.h> 21bc3b2d7fb9b014d75ebb79ba371a763dbab5e8cfPaul Gortmaker#include <linux/export.h> 220a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg#include <net/mac80211.h> 230a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 240a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg#include "ieee80211_i.h" 252448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg#include "driver-ops.h" 265484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg#include "mesh.h" 270a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 280a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg#define IEEE80211_PROBE_DELAY (HZ / 33) 290a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg#define IEEE80211_CHANNEL_TIME (HZ / 33) 303f892b61a8cf6a85bc389c8d13209d686a4f6403Stanislaw Gruszka#define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 9) 310a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 325484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Bergvoid ieee80211_rx_bss_put(struct ieee80211_local *local, 33c2b13452b283f9c4a5b02a6b53ed6416ebf4c03cJohannes Berg struct ieee80211_bss *bss) 345484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg{ 350c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg if (!bss) 360c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg return; 375b112d3d098c97b867cc580f590395cd1e72f18cJohannes Berg cfg80211_put_bss(local->hw.wiphy, 385b112d3d098c97b867cc580f590395cd1e72f18cJohannes Berg container_of((void *)bss, struct cfg80211_bss, priv)); 395484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg} 405484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg 41ab13315af97919fae0e014748105fdc2e30afb2dKalle Valostatic bool is_uapsd_supported(struct ieee802_11_elems *elems) 42ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo{ 43ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo u8 qos_info; 44ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo 45ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo if (elems->wmm_info && elems->wmm_info_len == 7 46ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo && elems->wmm_info[5] == 1) 47ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo qos_info = elems->wmm_info[6]; 48ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo else if (elems->wmm_param && elems->wmm_param_len == 24 49ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo && elems->wmm_param[5] == 1) 50ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo qos_info = elems->wmm_param[6]; 51ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo else 52ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo /* no valid wmm information or parameter element found */ 53ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo return false; 54ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo 55ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo return qos_info & IEEE80211_WMM_IE_AP_QOSINFO_UAPSD; 56ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo} 57ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo 58c2b13452b283f9c4a5b02a6b53ed6416ebf4c03cJohannes Bergstruct ieee80211_bss * 595484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Bergieee80211_bss_info_update(struct ieee80211_local *local, 605484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg struct ieee80211_rx_status *rx_status, 61d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach struct ieee80211_mgmt *mgmt, size_t len, 625484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg struct ieee802_11_elems *elems, 63d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach struct ieee80211_channel *channel) 645484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg{ 65d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach bool beacon = ieee80211_is_beacon(mgmt->frame_control); 660c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg struct cfg80211_bss *cbss; 67c2b13452b283f9c4a5b02a6b53ed6416ebf4c03cJohannes Berg struct ieee80211_bss *bss; 68f0b058b61711ebf5be94d6865ca7b2c259b71d37Stanislaw Gruszka int clen, srlen; 697ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich enum nl80211_bss_scan_width scan_width; 702a5193119269062608582418deba7af82844159aJohannes Berg s32 signal = 0; 712a5193119269062608582418deba7af82844159aJohannes Berg 7277965c970d7da9c9b6349ff2b1d9adecf54c403bJohannes Berg if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) 732a5193119269062608582418deba7af82844159aJohannes Berg signal = rx_status->signal * 100; 7477965c970d7da9c9b6349ff2b1d9adecf54c403bJohannes Berg else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) 752a5193119269062608582418deba7af82844159aJohannes Berg signal = (rx_status->signal * 100) / local->hw.max_signal; 762a5193119269062608582418deba7af82844159aJohannes Berg 777ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich scan_width = NL80211_BSS_CHAN_WIDTH_20; 787ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich if (rx_status->flag & RX_FLAG_5MHZ) 797ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich scan_width = NL80211_BSS_CHAN_WIDTH_5; 807ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich if (rx_status->flag & RX_FLAG_10MHZ) 817ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich scan_width = NL80211_BSS_CHAN_WIDTH_10; 827ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich 837ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich cbss = cfg80211_inform_bss_width_frame(local->hw.wiphy, channel, 847ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich scan_width, mgmt, len, signal, 857ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich GFP_ATOMIC); 860c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg if (!cbss) 8700d3f14cf9f12c21428121026a5e1d5f65926447Johannes Berg return NULL; 8800d3f14cf9f12c21428121026a5e1d5f65926447Johannes Berg 890c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg bss = (void *)cbss->priv; 905484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg 91ef429dadf33feeb150098dbe84ccaa877e3261f6Johannes Berg if (beacon) 92ef429dadf33feeb150098dbe84ccaa877e3261f6Johannes Berg bss->device_ts_beacon = rx_status->device_timestamp; 93ef429dadf33feeb150098dbe84ccaa877e3261f6Johannes Berg else 94ef429dadf33feeb150098dbe84ccaa877e3261f6Johannes Berg bss->device_ts_presp = rx_status->device_timestamp; 958c358bcd097fa1f63e57fb82525ba52f4a537bfaJohannes Berg 96fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart if (elems->parse_error) { 97fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart if (beacon) 98fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart bss->corrupt_data |= IEEE80211_BSS_CORRUPT_BEACON; 99fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart else 100fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart bss->corrupt_data |= IEEE80211_BSS_CORRUPT_PROBE_RESP; 101fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart } else { 102fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart if (beacon) 103fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart bss->corrupt_data &= ~IEEE80211_BSS_CORRUPT_BEACON; 104fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart else 105fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart bss->corrupt_data &= ~IEEE80211_BSS_CORRUPT_PROBE_RESP; 106fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart } 107fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart 1085484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg /* save the ERP value so that it is available at association time */ 1091946bed95707ef75d85e94ebe106ce7a119ca831Johannes Berg if (elems->erp_info && (!elems->parse_error || 1101946bed95707ef75d85e94ebe106ce7a119ca831Johannes Berg !(bss->valid_data & IEEE80211_BSS_VALID_ERP))) { 1115484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg bss->erp_value = elems->erp_info[0]; 1123db1cd5c05f35fb43eb134df6f321de4e63141f2Rusty Russell bss->has_erp_value = true; 113fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart if (!elems->parse_error) 114fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart bss->valid_data |= IEEE80211_BSS_VALID_ERP; 1155484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg } 1165484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg 117f0b058b61711ebf5be94d6865ca7b2c259b71d37Stanislaw Gruszka /* replace old supported rates if we get new values */ 118fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart if (!elems->parse_error || 119fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart !(bss->valid_data & IEEE80211_BSS_VALID_RATES)) { 120fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart srlen = 0; 121fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart if (elems->supp_rates) { 122fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart clen = IEEE80211_MAX_SUPP_RATES; 123fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart if (clen > elems->supp_rates_len) 124fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart clen = elems->supp_rates_len; 125fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart memcpy(bss->supp_rates, elems->supp_rates, clen); 126fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart srlen += clen; 127fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart } 128fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart if (elems->ext_supp_rates) { 129fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart clen = IEEE80211_MAX_SUPP_RATES - srlen; 130fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart if (clen > elems->ext_supp_rates_len) 131fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart clen = elems->ext_supp_rates_len; 132fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart memcpy(bss->supp_rates + srlen, elems->ext_supp_rates, 133fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart clen); 134fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart srlen += clen; 135fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart } 136fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart if (srlen) { 137fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart bss->supp_rates_len = srlen; 138fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart if (!elems->parse_error) 139fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart bss->valid_data |= IEEE80211_BSS_VALID_RATES; 140fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart } 1415484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg } 1425484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg 143fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart if (!elems->parse_error || 144fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart !(bss->valid_data & IEEE80211_BSS_VALID_WMM)) { 145fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart bss->wmm_used = elems->wmm_param || elems->wmm_info; 146fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart bss->uapsd_supported = is_uapsd_supported(elems); 147fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart if (!elems->parse_error) 148fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart bss->valid_data |= IEEE80211_BSS_VALID_WMM; 149fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart } 1505484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg 151817cee767523769cbc5ac94e439cde0c21752cbcAlexander Bondar if (beacon) { 152817cee767523769cbc5ac94e439cde0c21752cbcAlexander Bondar struct ieee80211_supported_band *sband = 153817cee767523769cbc5ac94e439cde0c21752cbcAlexander Bondar local->hw.wiphy->bands[rx_status->band]; 154817cee767523769cbc5ac94e439cde0c21752cbcAlexander Bondar if (!(rx_status->flag & RX_FLAG_HT) && 155817cee767523769cbc5ac94e439cde0c21752cbcAlexander Bondar !(rx_status->flag & RX_FLAG_VHT)) 156817cee767523769cbc5ac94e439cde0c21752cbcAlexander Bondar bss->beacon_rate = 157817cee767523769cbc5ac94e439cde0c21752cbcAlexander Bondar &sband->bitrates[rx_status->rate_idx]; 158817cee767523769cbc5ac94e439cde0c21752cbcAlexander Bondar } 159817cee767523769cbc5ac94e439cde0c21752cbcAlexander Bondar 1605484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg return bss; 1615484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg} 1620a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 163d48b296850f25cb559cb9b907d6d8c09eca3e89dJohannes Bergvoid ieee80211_scan_rx(struct ieee80211_local *local, struct sk_buff *skb) 16498c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg{ 165f1d58c2521eb160178b2151d6326d8dc5d7c8560Johannes Berg struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb); 166d48b296850f25cb559cb9b907d6d8c09eca3e89dJohannes Berg struct ieee80211_sub_if_data *sdata1, *sdata2; 167d48b296850f25cb559cb9b907d6d8c09eca3e89dJohannes Berg struct ieee80211_mgmt *mgmt = (void *)skb->data; 168c2b13452b283f9c4a5b02a6b53ed6416ebf4c03cJohannes Berg struct ieee80211_bss *bss; 16998c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg u8 *elements; 17098c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg struct ieee80211_channel *channel; 17198c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg size_t baselen; 17298c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg struct ieee802_11_elems elems; 17398c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 174d48b296850f25cb559cb9b907d6d8c09eca3e89dJohannes Berg if (skb->len < 24 || 175d48b296850f25cb559cb9b907d6d8c09eca3e89dJohannes Berg (!ieee80211_is_probe_resp(mgmt->frame_control) && 176d48b296850f25cb559cb9b907d6d8c09eca3e89dJohannes Berg !ieee80211_is_beacon(mgmt->frame_control))) 177d48b296850f25cb559cb9b907d6d8c09eca3e89dJohannes Berg return; 17898c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 179d48b296850f25cb559cb9b907d6d8c09eca3e89dJohannes Berg sdata1 = rcu_dereference(local->scan_sdata); 180d48b296850f25cb559cb9b907d6d8c09eca3e89dJohannes Berg sdata2 = rcu_dereference(local->sched_scan_sdata); 18198c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 182d48b296850f25cb559cb9b907d6d8c09eca3e89dJohannes Berg if (likely(!sdata1 && !sdata2)) 183d48b296850f25cb559cb9b907d6d8c09eca3e89dJohannes Berg return; 18498c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 185d48b296850f25cb559cb9b907d6d8c09eca3e89dJohannes Berg if (ieee80211_is_probe_resp(mgmt->frame_control)) { 18698c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg /* ignore ProbeResp to foreign address */ 187d48b296850f25cb559cb9b907d6d8c09eca3e89dJohannes Berg if ((!sdata1 || !ether_addr_equal(mgmt->da, sdata1->vif.addr)) && 188d48b296850f25cb559cb9b907d6d8c09eca3e89dJohannes Berg (!sdata2 || !ether_addr_equal(mgmt->da, sdata2->vif.addr))) 189d48b296850f25cb559cb9b907d6d8c09eca3e89dJohannes Berg return; 19098c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 19198c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg elements = mgmt->u.probe_resp.variable; 19298c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg baselen = offsetof(struct ieee80211_mgmt, u.probe_resp.variable); 19398c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg } else { 19498c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg baselen = offsetof(struct ieee80211_mgmt, u.beacon.variable); 19598c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg elements = mgmt->u.beacon.variable; 19698c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg } 19798c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 19898c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg if (baselen > skb->len) 199d48b296850f25cb559cb9b907d6d8c09eca3e89dJohannes Berg return; 20098c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 201b2e506bfc4d752b68a0ccaae1e977898263eba4cJohannes Berg ieee802_11_parse_elems(elements, skb->len - baselen, false, &elems); 20298c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 2030172bb75073e11a5aa9d8a953bdaefb8709f00c8Johannes Berg channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq); 20498c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 20598c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) 206d48b296850f25cb559cb9b907d6d8c09eca3e89dJohannes Berg return; 20798c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 208d48b296850f25cb559cb9b907d6d8c09eca3e89dJohannes Berg bss = ieee80211_bss_info_update(local, rx_status, 20998c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg mgmt, skb->len, &elems, 210d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach channel); 211d048e503a2b01e771ee87921c24d89d7ec3f0c2fJouni Malinen if (bss) 212d48b296850f25cb559cb9b907d6d8c09eca3e89dJohannes Berg ieee80211_rx_bss_put(local, bss); 21398c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg} 21498c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 2152103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlichstatic void 2162103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlichieee80211_prepare_scan_chandef(struct cfg80211_chan_def *chandef, 2172103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich enum nl80211_bss_scan_width scan_width) 2182103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich{ 2192103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich memset(chandef, 0, sizeof(*chandef)); 2202103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich switch (scan_width) { 2212103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich case NL80211_BSS_CHAN_WIDTH_5: 2222103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich chandef->width = NL80211_CHAN_WIDTH_5; 2232103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich break; 2242103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich case NL80211_BSS_CHAN_WIDTH_10: 2252103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich chandef->width = NL80211_CHAN_WIDTH_10; 2262103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich break; 2272103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich default: 2282103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich chandef->width = NL80211_CHAN_WIDTH_20_NOHT; 2292103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich break; 2302103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich } 2312103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich} 2322103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich 2334d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg/* return false if no more work */ 2344d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Bergstatic bool ieee80211_prep_hw_scan(struct ieee80211_local *local) 2354d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg{ 2364d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg struct cfg80211_scan_request *req = local->scan_req; 2372103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich struct cfg80211_chan_def chandef; 2384d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg enum ieee80211_band band; 2394d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg int i, ielen, n_chans; 2404d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg 241a754055a1296fcbe6f32de3a5eaca6efb2fd1865Emmanuel Grumbach if (test_bit(SCAN_HW_CANCELLED, &local->scanning)) 242a754055a1296fcbe6f32de3a5eaca6efb2fd1865Emmanuel Grumbach return false; 243a754055a1296fcbe6f32de3a5eaca6efb2fd1865Emmanuel Grumbach 2444d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg do { 2454d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg if (local->hw_scan_band == IEEE80211_NUM_BANDS) 2464d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg return false; 2474d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg 2484d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg band = local->hw_scan_band; 2494d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg n_chans = 0; 2504d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg for (i = 0; i < req->n_channels; i++) { 2514d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg if (req->channels[i]->band == band) { 2524d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg local->hw_scan_req->channels[n_chans] = 2534d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg req->channels[i]; 2544d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg n_chans++; 2554d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg } 2564d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg } 2574d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg 2584d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg local->hw_scan_band++; 2594d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg } while (!n_chans); 2604d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg 2614d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg local->hw_scan_req->n_channels = n_chans; 2622103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich ieee80211_prepare_scan_chandef(&chandef, req->scan_width); 2634d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg 2644d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg ielen = ieee80211_build_preq_ies(local, (u8 *)local->hw_scan_req->ie, 265c604b9f219422e969fe371cc7259de34c3c5601dJohannes Berg local->hw_scan_ies_bufsize, 2668ee3108075c9e9e2701493a245a754b8b0db8e57Johannes Berg req->ie, req->ie_len, band, 2672103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich req->rates[band], &chandef); 2684d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg local->hw_scan_req->ie_len = ielen; 269dcd83976bea3ae3bc0822ed26cf200d9d6203121Johannes Berg local->hw_scan_req->no_cck = req->no_cck; 2704d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg 2714d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg return true; 2724d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg} 2734d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg 2748bd2a2489971d3bcdbae6d9d9e9414f04cb0543bEliad Pellerstatic void __ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted) 2750a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg{ 2760a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg struct ieee80211_local *local = hw_to_local(hw); 2778bd2a2489971d3bcdbae6d9d9e9414f04cb0543bEliad Peller bool hw_scan = local->ops->hw_scan; 278a2b70e833e189a4aefb2d3b668e3d7046dcc45c2Eliad Peller bool was_scanning = local->scanning; 2790a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 280e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka lockdep_assert_held(&local->mtx); 2815bc75728fd43bb15b46f16ef465bcf9d487393cfJohannes Berg 2826d3560d4fc9c5b9fe1a07a63926ea70512c69c32Johannes Berg /* 2836d3560d4fc9c5b9fe1a07a63926ea70512c69c32Johannes Berg * It's ok to abort a not-yet-running scan (that 2846d3560d4fc9c5b9fe1a07a63926ea70512c69c32Johannes Berg * we have one at all will be verified by checking 2856d3560d4fc9c5b9fe1a07a63926ea70512c69c32Johannes Berg * local->scan_req next), but not to complete it 2866d3560d4fc9c5b9fe1a07a63926ea70512c69c32Johannes Berg * successfully. 2876d3560d4fc9c5b9fe1a07a63926ea70512c69c32Johannes Berg */ 2886d3560d4fc9c5b9fe1a07a63926ea70512c69c32Johannes Berg if (WARN_ON(!local->scanning && !aborted)) 2896d3560d4fc9c5b9fe1a07a63926ea70512c69c32Johannes Berg aborted = true; 2905bc75728fd43bb15b46f16ef465bcf9d487393cfJohannes Berg 291e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka if (WARN_ON(!local->scan_req)) 292d07bfd8b6f20a81d7ec65c50f35b053d9e3aa740Johannes Berg return; 293de95a54b1aebe5592cae971ca5e5d9ec6a381a17Johannes Berg 2948bd2a2489971d3bcdbae6d9d9e9414f04cb0543bEliad Peller if (hw_scan && !aborted && ieee80211_prep_hw_scan(local)) { 295e2fd5dbc1c7031be5b5de043bcc0a18c7a59a68aJohannes Berg int rc; 296e2fd5dbc1c7031be5b5de043bcc0a18c7a59a68aJohannes Berg 297e2fd5dbc1c7031be5b5de043bcc0a18c7a59a68aJohannes Berg rc = drv_hw_scan(local, 298e2fd5dbc1c7031be5b5de043bcc0a18c7a59a68aJohannes Berg rcu_dereference_protected(local->scan_sdata, 299e2fd5dbc1c7031be5b5de043bcc0a18c7a59a68aJohannes Berg lockdep_is_held(&local->mtx)), 300e2fd5dbc1c7031be5b5de043bcc0a18c7a59a68aJohannes Berg local->hw_scan_req); 301e2fd5dbc1c7031be5b5de043bcc0a18c7a59a68aJohannes Berg 3026eb11a9a311a0f7e5b9b66c18f7498a26c9ec206Stanislaw Gruszka if (rc == 0) 303d07bfd8b6f20a81d7ec65c50f35b053d9e3aa740Johannes Berg return; 3044d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg } 3054d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg 3064d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg kfree(local->hw_scan_req); 3074d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg local->hw_scan_req = NULL; 308f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 3095ba63533bbf653631faab60f6988506160ec6ba4Johannes Berg if (local->scan_req != local->int_scan_req) 3102a5193119269062608582418deba7af82844159aJohannes Berg cfg80211_scan_done(local->scan_req, aborted); 3112a5193119269062608582418deba7af82844159aJohannes Berg local->scan_req = NULL; 3120c2bef4621c5feb5bda9068c9964b2e9acf57017Monam Agarwal RCU_INIT_POINTER(local->scan_sdata, NULL); 3132a5193119269062608582418deba7af82844159aJohannes Berg 314fbe9c429f195111bbf7f1630efa19aee295fd8e7Helmut Schaa local->scanning = 0; 3157ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich local->scan_chandef.chan = NULL; 316f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 31707ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg /* Set power back to normal operating levels. */ 31807ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg ieee80211_hw_config(local, 0); 319a0daa0e7592ada797d6835f11529097aabc27ad2Luis R. Rodriguez 3208bd2a2489971d3bcdbae6d9d9e9414f04cb0543bEliad Peller if (!hw_scan) { 321e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka ieee80211_configure_filter(local); 322e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka drv_sw_scan_complete(local); 323aacde9ee45225f7e0b90960f479aef83c66bfdc0Stanislaw Gruszka ieee80211_offchannel_return(local); 324e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka } 3250a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 3265cff20e6c5a6591a79d3b027af222870f52bb550Johannes Berg ieee80211_recalc_idle(local); 327e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka 3280a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg ieee80211_mlme_notify_scan_completed(local); 329469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_ibss_notify_scan_completed(local); 330472dbc45dc1966284de72d7de15690c17ed2cf33Johannes Berg ieee80211_mesh_notify_scan_completed(local); 331a2b70e833e189a4aefb2d3b668e3d7046dcc45c2Eliad Peller if (was_scanning) 332a2b70e833e189a4aefb2d3b668e3d7046dcc45c2Eliad Peller ieee80211_start_next_roc(local); 3330a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg} 3348789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg 3358789d459bc5e837bf37d261453df96ef54018d7bJohannes Bergvoid ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted) 3368789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg{ 3378789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg struct ieee80211_local *local = hw_to_local(hw); 3388789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg 3398789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg trace_api_scan_completed(local, aborted); 3408789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg 3418789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg set_bit(SCAN_COMPLETED, &local->scanning); 3428789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg if (aborted) 3438789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg set_bit(SCAN_ABORTED, &local->scanning); 3448789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0); 3458789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg} 3460a51b27e956bd9580296c48191b78175ed8b5971Johannes BergEXPORT_SYMBOL(ieee80211_scan_completed); 3470a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 348f3b85252f081581a8f257545ed748062dce7798bJohannes Bergstatic int ieee80211_start_sw_scan(struct ieee80211_local *local) 349f3b85252f081581a8f257545ed748062dce7798bJohannes Berg{ 350fe57d9f5c0a2c1ef97ba8cdc42cfda5743f287b8Johannes Berg /* Software scan is not supported in multi-channel cases */ 351fe57d9f5c0a2c1ef97ba8cdc42cfda5743f287b8Johannes Berg if (local->use_chanctx) 352fe57d9f5c0a2c1ef97ba8cdc42cfda5743f287b8Johannes Berg return -EOPNOTSUPP; 353fe57d9f5c0a2c1ef97ba8cdc42cfda5743f287b8Johannes Berg 354f3b85252f081581a8f257545ed748062dce7798bJohannes Berg /* 355f3b85252f081581a8f257545ed748062dce7798bJohannes Berg * Hardware/driver doesn't support hw_scan, so use software 356f3b85252f081581a8f257545ed748062dce7798bJohannes Berg * scanning instead. First send a nullfunc frame with power save 357f3b85252f081581a8f257545ed748062dce7798bJohannes Berg * bit on so that AP will buffer the frames for us while we are not 358f3b85252f081581a8f257545ed748062dce7798bJohannes Berg * listening, then send probe requests to each channel and wait for 359f3b85252f081581a8f257545ed748062dce7798bJohannes Berg * the responses. After all channels are scanned, tune back to the 360f3b85252f081581a8f257545ed748062dce7798bJohannes Berg * original channel and send a nullfunc frame with power save bit 361f3b85252f081581a8f257545ed748062dce7798bJohannes Berg * off to trigger the AP to send us all the buffered frames. 362f3b85252f081581a8f257545ed748062dce7798bJohannes Berg * 363f3b85252f081581a8f257545ed748062dce7798bJohannes Berg * Note that while local->sw_scanning is true everything else but 364f3b85252f081581a8f257545ed748062dce7798bJohannes Berg * nullfunc frames and probe requests will be dropped in 365f3b85252f081581a8f257545ed748062dce7798bJohannes Berg * ieee80211_tx_h_check_assoc(). 366f3b85252f081581a8f257545ed748062dce7798bJohannes Berg */ 3672448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg drv_sw_scan_start(local); 368f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 369de312db345f9770b64ff39ef5a7f86f6358e93ccRajkumar Manoharan local->leave_oper_channel_time = jiffies; 370977923b00c79185c11b4b47664f5ffa4c3820438Helmut Schaa local->next_scan_state = SCAN_DECISION; 371f3b85252f081581a8f257545ed748062dce7798bJohannes Berg local->scan_channel_idx = 0; 372f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 373aacde9ee45225f7e0b90960f479aef83c66bfdc0Stanislaw Gruszka ieee80211_offchannel_stop_vifs(local); 374a80f7c0b088187c8471b441d461e937991870661Johannes Berg 3759c35d7d2368f54313b988a01c408e5cf863ffd9eSeth Forshee /* ensure nullfunc is transmitted before leaving operating channel */ 37639ecc01d1bbe3de2cf5f01a81e176ea5160d3b95Johannes Berg ieee80211_flush_queues(local, NULL); 3779c35d7d2368f54313b988a01c408e5cf863ffd9eSeth Forshee 3783ac64beecd27400d12cc7afb4108eef26c499f6aJohannes Berg ieee80211_configure_filter(local); 379f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 38059bdf3b0fe7a183f18ce94696259c4c76abb4568Ben Greear /* We need to set power level at maximum rate for scanning. */ 38159bdf3b0fe7a183f18ce94696259c4c76abb4568Ben Greear ieee80211_hw_config(local, 0); 38259bdf3b0fe7a183f18ce94696259c4c76abb4568Ben Greear 38342935ecaf4e784d0815afa9a7e5fe7e141157ca3Luis R. Rodriguez ieee80211_queue_delayed_work(&local->hw, 38407ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg &local->scan_work, 0); 385f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 386f3b85252f081581a8f257545ed748062dce7798bJohannes Berg return 0; 387f3b85252f081581a8f257545ed748062dce7798bJohannes Berg} 388f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 389133d40f9a22bdfd2617a446f1e3209537c5415ecStanislaw Gruszkastatic bool ieee80211_can_scan(struct ieee80211_local *local, 390133d40f9a22bdfd2617a446f1e3209537c5415ecStanislaw Gruszka struct ieee80211_sub_if_data *sdata) 391133d40f9a22bdfd2617a446f1e3209537c5415ecStanislaw Gruszka{ 392164eb02d070af987890e1db1c12b8ae0394b19f7Simon Wunderlich if (local->radar_detect_enabled) 393164eb02d070af987890e1db1c12b8ae0394b19f7Simon Wunderlich return false; 394164eb02d070af987890e1db1c12b8ae0394b19f7Simon Wunderlich 3952eb278e083549f4eb29838037004054b3b55df62Johannes Berg if (!list_empty(&local->roc_list)) 396133d40f9a22bdfd2617a446f1e3209537c5415ecStanislaw Gruszka return false; 397133d40f9a22bdfd2617a446f1e3209537c5415ecStanislaw Gruszka 398133d40f9a22bdfd2617a446f1e3209537c5415ecStanislaw Gruszka if (sdata->vif.type == NL80211_IFTYPE_STATION && 399392b9ffb05b62fe38aa813b924d160ab663cec8dStanislaw Gruszka sdata->u.mgd.flags & IEEE80211_STA_CONNECTION_POLL) 400133d40f9a22bdfd2617a446f1e3209537c5415ecStanislaw Gruszka return false; 401133d40f9a22bdfd2617a446f1e3209537c5415ecStanislaw Gruszka 402133d40f9a22bdfd2617a446f1e3209537c5415ecStanislaw Gruszka return true; 403133d40f9a22bdfd2617a446f1e3209537c5415ecStanislaw Gruszka} 404133d40f9a22bdfd2617a446f1e3209537c5415ecStanislaw Gruszka 405133d40f9a22bdfd2617a446f1e3209537c5415ecStanislaw Gruszkavoid ieee80211_run_deferred_scan(struct ieee80211_local *local) 406133d40f9a22bdfd2617a446f1e3209537c5415ecStanislaw Gruszka{ 407133d40f9a22bdfd2617a446f1e3209537c5415ecStanislaw Gruszka lockdep_assert_held(&local->mtx); 408133d40f9a22bdfd2617a446f1e3209537c5415ecStanislaw Gruszka 409133d40f9a22bdfd2617a446f1e3209537c5415ecStanislaw Gruszka if (!local->scan_req || local->scanning) 410133d40f9a22bdfd2617a446f1e3209537c5415ecStanislaw Gruszka return; 411133d40f9a22bdfd2617a446f1e3209537c5415ecStanislaw Gruszka 412e2fd5dbc1c7031be5b5de043bcc0a18c7a59a68aJohannes Berg if (!ieee80211_can_scan(local, 413e2fd5dbc1c7031be5b5de043bcc0a18c7a59a68aJohannes Berg rcu_dereference_protected( 414e2fd5dbc1c7031be5b5de043bcc0a18c7a59a68aJohannes Berg local->scan_sdata, 415e2fd5dbc1c7031be5b5de043bcc0a18c7a59a68aJohannes Berg lockdep_is_held(&local->mtx)))) 416133d40f9a22bdfd2617a446f1e3209537c5415ecStanislaw Gruszka return; 417133d40f9a22bdfd2617a446f1e3209537c5415ecStanislaw Gruszka 418133d40f9a22bdfd2617a446f1e3209537c5415ecStanislaw Gruszka ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 419133d40f9a22bdfd2617a446f1e3209537c5415ecStanislaw Gruszka round_jiffies_relative(0)); 420133d40f9a22bdfd2617a446f1e3209537c5415ecStanislaw Gruszka} 421f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 4228a690674e0601efbe9a7b16a5826fc522645cca3Ben Greearstatic void ieee80211_scan_state_send_probe(struct ieee80211_local *local, 4238a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear unsigned long *next_delay) 4248a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear{ 4258a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear int i; 426e2fd5dbc1c7031be5b5de043bcc0a18c7a59a68aJohannes Berg struct ieee80211_sub_if_data *sdata; 427675a0b049abf6edf30f8dd84c5610b6edc2296c8Karl Beldan enum ieee80211_band band = local->hw.conf.chandef.chan->band; 4286c17b77b67587b9f9e3070fb89fe98cef3187131Seth Forshee u32 tx_flags; 4296c17b77b67587b9f9e3070fb89fe98cef3187131Seth Forshee 4306c17b77b67587b9f9e3070fb89fe98cef3187131Seth Forshee tx_flags = IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 4316c17b77b67587b9f9e3070fb89fe98cef3187131Seth Forshee if (local->scan_req->no_cck) 4326c17b77b67587b9f9e3070fb89fe98cef3187131Seth Forshee tx_flags |= IEEE80211_TX_CTL_NO_CCK_RATE; 4338a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear 434e2fd5dbc1c7031be5b5de043bcc0a18c7a59a68aJohannes Berg sdata = rcu_dereference_protected(local->scan_sdata, 435316b6b5df77db801d62ec381cfae0c38ff84252cPeter Senna Tschudin lockdep_is_held(&local->mtx)); 436e2fd5dbc1c7031be5b5de043bcc0a18c7a59a68aJohannes Berg 4378a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear for (i = 0; i < local->scan_req->n_ssids; i++) 4388a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear ieee80211_send_probe_req( 4398a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear sdata, NULL, 4408a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear local->scan_req->ssids[i].ssid, 4418a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear local->scan_req->ssids[i].ssid_len, 4428a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear local->scan_req->ie, local->scan_req->ie_len, 4438a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear local->scan_req->rates[band], false, 444675a0b049abf6edf30f8dd84c5610b6edc2296c8Karl Beldan tx_flags, local->hw.conf.chandef.chan, true); 4458a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear 4468a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear /* 4478a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear * After sending probe requests, wait for probe responses 4488a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear * on the channel. 4498a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear */ 4508a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear *next_delay = IEEE80211_CHANNEL_TIME; 4518a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear local->next_scan_state = SCAN_DECISION; 4528a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear} 4538a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear 454f3b85252f081581a8f257545ed748062dce7798bJohannes Bergstatic int __ieee80211_start_scan(struct ieee80211_sub_if_data *sdata, 455f3b85252f081581a8f257545ed748062dce7798bJohannes Berg struct cfg80211_scan_request *req) 456f3b85252f081581a8f257545ed748062dce7798bJohannes Berg{ 457f3b85252f081581a8f257545ed748062dce7798bJohannes Berg struct ieee80211_local *local = sdata->local; 458f3b85252f081581a8f257545ed748062dce7798bJohannes Berg int rc; 459f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 460e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka lockdep_assert_held(&local->mtx); 461e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka 462f3b85252f081581a8f257545ed748062dce7798bJohannes Berg if (local->scan_req) 463f3b85252f081581a8f257545ed748062dce7798bJohannes Berg return -EBUSY; 464f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 465133d40f9a22bdfd2617a446f1e3209537c5415ecStanislaw Gruszka if (!ieee80211_can_scan(local, sdata)) { 4666e7e6213e4956828927c30e3ef5a42812d00c650John W. Linville /* wait for the work to finish/time out */ 467c0ce77b8323c1a0d4eeef97caf16c0ea971222a9Johannes Berg local->scan_req = req; 468e2fd5dbc1c7031be5b5de043bcc0a18c7a59a68aJohannes Berg rcu_assign_pointer(local->scan_sdata, sdata); 469c0ce77b8323c1a0d4eeef97caf16c0ea971222a9Johannes Berg return 0; 470c0ce77b8323c1a0d4eeef97caf16c0ea971222a9Johannes Berg } 471c0ce77b8323c1a0d4eeef97caf16c0ea971222a9Johannes Berg 472f3b85252f081581a8f257545ed748062dce7798bJohannes Berg if (local->ops->hw_scan) { 473f3b85252f081581a8f257545ed748062dce7798bJohannes Berg u8 *ies; 474f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 475e4dcbb375cd829e1649b12e0ab7d7e5b7efcb5a5David Spinadel local->hw_scan_ies_bufsize = local->scan_ies_len + req->ie_len; 4764d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg local->hw_scan_req = kmalloc( 4774d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg sizeof(*local->hw_scan_req) + 4784d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg req->n_channels * sizeof(req->channels[0]) + 479c604b9f219422e969fe371cc7259de34c3c5601dJohannes Berg local->hw_scan_ies_bufsize, GFP_KERNEL); 4804d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg if (!local->hw_scan_req) 481f3b85252f081581a8f257545ed748062dce7798bJohannes Berg return -ENOMEM; 482f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 4834d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg local->hw_scan_req->ssids = req->ssids; 4844d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg local->hw_scan_req->n_ssids = req->n_ssids; 4854d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg ies = (u8 *)local->hw_scan_req + 4864d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg sizeof(*local->hw_scan_req) + 4874d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg req->n_channels * sizeof(req->channels[0]); 4884d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg local->hw_scan_req->ie = ies; 489cd2bb512cda58f1efb922ad6dc29013ea5d5d9d0Sam Leffler local->hw_scan_req->flags = req->flags; 4904d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg 4914d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg local->hw_scan_band = 0; 4926e7e6213e4956828927c30e3ef5a42812d00c650John W. Linville 4936e7e6213e4956828927c30e3ef5a42812d00c650John W. Linville /* 4946e7e6213e4956828927c30e3ef5a42812d00c650John W. Linville * After allocating local->hw_scan_req, we must 4956e7e6213e4956828927c30e3ef5a42812d00c650John W. Linville * go through until ieee80211_prep_hw_scan(), so 4966e7e6213e4956828927c30e3ef5a42812d00c650John W. Linville * anything that might be changed here and leave 4976e7e6213e4956828927c30e3ef5a42812d00c650John W. Linville * this function early must not go after this 4986e7e6213e4956828927c30e3ef5a42812d00c650John W. Linville * allocation. 4996e7e6213e4956828927c30e3ef5a42812d00c650John W. Linville */ 500f3b85252f081581a8f257545ed748062dce7798bJohannes Berg } 501f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 502f3b85252f081581a8f257545ed748062dce7798bJohannes Berg local->scan_req = req; 503e2fd5dbc1c7031be5b5de043bcc0a18c7a59a68aJohannes Berg rcu_assign_pointer(local->scan_sdata, sdata); 504f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 5058a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear if (local->ops->hw_scan) { 506fbe9c429f195111bbf7f1630efa19aee295fd8e7Helmut Schaa __set_bit(SCAN_HW_SCANNING, &local->scanning); 5078a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear } else if ((req->n_channels == 1) && 508675a0b049abf6edf30f8dd84c5610b6edc2296c8Karl Beldan (req->channels[0] == local->_oper_chandef.chan)) { 5099b8648704358e42f9865cd6de7cedb5ac0db67e7Johannes Berg /* 5109b8648704358e42f9865cd6de7cedb5ac0db67e7Johannes Berg * If we are scanning only on the operating channel 5119b8648704358e42f9865cd6de7cedb5ac0db67e7Johannes Berg * then we do not need to stop normal activities 5128a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear */ 5138a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear unsigned long next_delay; 5148a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear 5158a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear __set_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning); 5168a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear 5178a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear ieee80211_recalc_idle(local); 5188a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear 5198a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear /* Notify driver scan is starting, keep order of operations 5208a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear * same as normal software scan, in case that matters. */ 5218a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear drv_sw_scan_start(local); 5228a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear 5238a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear ieee80211_configure_filter(local); /* accept probe-responses */ 5248a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear 5258a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear /* We need to ensure power level is at max for scanning. */ 5268a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear ieee80211_hw_config(local, 0); 5278a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear 5288a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear if ((req->channels[0]->flags & 5298fe02e167efa8ed4a4503a5eedc0f49fcb7e3eb9Luis R. Rodriguez IEEE80211_CHAN_NO_IR) || 5308a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear !local->scan_req->n_ssids) { 5318a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear next_delay = IEEE80211_PASSIVE_CHANNEL_TIME; 5328a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear } else { 5338a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear ieee80211_scan_state_send_probe(local, &next_delay); 5348a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear next_delay = IEEE80211_CHANNEL_TIME; 5358a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear } 5368a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear 5378a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear /* Now, just wait a bit and we are all done! */ 5388a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 5398a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear next_delay); 5408a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear return 0; 5418a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear } else { 5428a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear /* Do normal software scan */ 543fbe9c429f195111bbf7f1630efa19aee295fd8e7Helmut Schaa __set_bit(SCAN_SW_SCANNING, &local->scanning); 5448a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear } 5456e7e6213e4956828927c30e3ef5a42812d00c650John W. Linville 5465cff20e6c5a6591a79d3b027af222870f52bb550Johannes Berg ieee80211_recalc_idle(local); 547f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 5484d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg if (local->ops->hw_scan) { 5494d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg WARN_ON(!ieee80211_prep_hw_scan(local)); 550a060bbfe4ee95d115e8f9705a66894ac34e2c475Johannes Berg rc = drv_hw_scan(local, sdata, local->hw_scan_req); 5514d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg } else 552f3b85252f081581a8f257545ed748062dce7798bJohannes Berg rc = ieee80211_start_sw_scan(local); 553f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 554f3b85252f081581a8f257545ed748062dce7798bJohannes Berg if (rc) { 5554d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg kfree(local->hw_scan_req); 5564d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg local->hw_scan_req = NULL; 557fbe9c429f195111bbf7f1630efa19aee295fd8e7Helmut Schaa local->scanning = 0; 558f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 5595cff20e6c5a6591a79d3b027af222870f52bb550Johannes Berg ieee80211_recalc_idle(local); 5605cff20e6c5a6591a79d3b027af222870f52bb550Johannes Berg 561f3b85252f081581a8f257545ed748062dce7798bJohannes Berg local->scan_req = NULL; 5620c2bef4621c5feb5bda9068c9964b2e9acf57017Monam Agarwal RCU_INIT_POINTER(local->scan_sdata, NULL); 563f3b85252f081581a8f257545ed748062dce7798bJohannes Berg } 564f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 565f3b85252f081581a8f257545ed748062dce7798bJohannes Berg return rc; 566f3b85252f081581a8f257545ed748062dce7798bJohannes Berg} 567f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 568df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaastatic unsigned long 569df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaaieee80211_scan_get_channel_time(struct ieee80211_channel *chan) 570df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa{ 571df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa /* 572df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa * TODO: channel switching also consumes quite some time, 573df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa * add that delay as well to get a better estimation 574df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa */ 5758fe02e167efa8ed4a4503a5eedc0f49fcb7e3eb9Luis R. Rodriguez if (chan->flags & IEEE80211_CHAN_NO_IR) 576df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa return IEEE80211_PASSIVE_CHANNEL_TIME; 577df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa return IEEE80211_PROBE_DELAY + IEEE80211_CHANNEL_TIME; 578df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa} 579df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa 580e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszkastatic void ieee80211_scan_state_decision(struct ieee80211_local *local, 581e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka unsigned long *next_delay) 5827d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa{ 583142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa bool associated = false; 584df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa bool tx_empty = true; 585df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa bool bad_latency; 586142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa struct ieee80211_sub_if_data *sdata; 587df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa struct ieee80211_channel *next_chan; 588cd2bb512cda58f1efb922ad6dc29013ea5d5d9d0Sam Leffler enum mac80211_scan_state next_scan_state; 589142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa 590df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa /* 591df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa * check if at least one STA interface is associated, 592df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa * check if at least one STA interface has pending tx frames 593df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa * and grab the lowest used beacon interval 594df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa */ 595142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa mutex_lock(&local->iflist_mtx); 596142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa list_for_each_entry(sdata, &local->interfaces, list) { 5979607e6b66a0d25ca63b70d54a4283fa13d8f7c9dJohannes Berg if (!ieee80211_sdata_running(sdata)) 598142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa continue; 599142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa 600142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa if (sdata->vif.type == NL80211_IFTYPE_STATION) { 601142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa if (sdata->u.mgd.associated) { 602142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa associated = true; 603df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa 604df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa if (!qdisc_all_tx_empty(sdata->dev)) { 605df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa tx_empty = false; 606df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa break; 607df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa } 608142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa } 609142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa } 610142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa } 611142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa mutex_unlock(&local->iflist_mtx); 612142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa 613b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear next_chan = local->scan_req->channels[local->scan_channel_idx]; 614b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear 615a80f7c0b088187c8471b441d461e937991870661Johannes Berg /* 61607ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg * we're currently scanning a different channel, let's 61707ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg * see if we can scan another channel without interfering 61807ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg * with the current traffic situation. 61907ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg * 6203f892b61a8cf6a85bc389c8d13209d686a4f6403Stanislaw Gruszka * Keep good latency, do not stay off-channel more than 125 ms. 621a80f7c0b088187c8471b441d461e937991870661Johannes Berg */ 622a80f7c0b088187c8471b441d461e937991870661Johannes Berg 62307ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg bad_latency = time_after(jiffies + 6243f892b61a8cf6a85bc389c8d13209d686a4f6403Stanislaw Gruszka ieee80211_scan_get_channel_time(next_chan), 6253f892b61a8cf6a85bc389c8d13209d686a4f6403Stanislaw Gruszka local->leave_oper_channel_time + HZ / 8); 626142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa 627cd2bb512cda58f1efb922ad6dc29013ea5d5d9d0Sam Leffler if (associated && !tx_empty) { 628cd2bb512cda58f1efb922ad6dc29013ea5d5d9d0Sam Leffler if (local->scan_req->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) 629cd2bb512cda58f1efb922ad6dc29013ea5d5d9d0Sam Leffler next_scan_state = SCAN_ABORT; 630cd2bb512cda58f1efb922ad6dc29013ea5d5d9d0Sam Leffler else 631cd2bb512cda58f1efb922ad6dc29013ea5d5d9d0Sam Leffler next_scan_state = SCAN_SUSPEND; 6323f892b61a8cf6a85bc389c8d13209d686a4f6403Stanislaw Gruszka } else if (associated && bad_latency) { 633cd2bb512cda58f1efb922ad6dc29013ea5d5d9d0Sam Leffler next_scan_state = SCAN_SUSPEND; 634cd2bb512cda58f1efb922ad6dc29013ea5d5d9d0Sam Leffler } else { 635cd2bb512cda58f1efb922ad6dc29013ea5d5d9d0Sam Leffler next_scan_state = SCAN_SET_CHANNEL; 636cd2bb512cda58f1efb922ad6dc29013ea5d5d9d0Sam Leffler } 637cd2bb512cda58f1efb922ad6dc29013ea5d5d9d0Sam Leffler 638cd2bb512cda58f1efb922ad6dc29013ea5d5d9d0Sam Leffler local->next_scan_state = next_scan_state; 639142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa 64007ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg *next_delay = 0; 641142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa} 642142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa 6432fb3f028a9a46bd344329766257699b4acb36525Helmut Schaastatic void ieee80211_scan_state_set_channel(struct ieee80211_local *local, 6442fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa unsigned long *next_delay) 6452fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa{ 6462fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa int skip; 6472fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa struct ieee80211_channel *chan; 6487ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich enum nl80211_bss_scan_width oper_scan_width; 6492fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa 6507d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa skip = 0; 6517d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa chan = local->scan_req->channels[local->scan_channel_idx]; 6527d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa 6537ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich local->scan_chandef.chan = chan; 6547ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich local->scan_chandef.center_freq1 = chan->center_freq; 6557ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich local->scan_chandef.center_freq2 = 0; 6567ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich switch (local->scan_req->scan_width) { 6577ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich case NL80211_BSS_CHAN_WIDTH_5: 6587ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich local->scan_chandef.width = NL80211_CHAN_WIDTH_5; 6597ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich break; 6607ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich case NL80211_BSS_CHAN_WIDTH_10: 6617ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich local->scan_chandef.width = NL80211_CHAN_WIDTH_10; 6627ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich break; 6637ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich case NL80211_BSS_CHAN_WIDTH_20: 6647ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich /* If scanning on oper channel, use whatever channel-type 6657ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich * is currently in use. 6667ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich */ 6677ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich oper_scan_width = cfg80211_chandef_to_scan_width( 6687ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich &local->_oper_chandef); 6697ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich if (chan == local->_oper_chandef.chan && 6707ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich oper_scan_width == local->scan_req->scan_width) 6717ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich local->scan_chandef = local->_oper_chandef; 6727ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich else 6737ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich local->scan_chandef.width = NL80211_CHAN_WIDTH_20_NOHT; 6747ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich break; 6757ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich } 676b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear 67707ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg if (ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL)) 67807ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg skip = 1; 6797d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa 6807d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa /* advance state machine to next channel/band */ 6817d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa local->scan_channel_idx++; 6827d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa 6830ee9c13c7c92581ab005d80795cf65897213b249Helmut Schaa if (skip) { 6840ee9c13c7c92581ab005d80795cf65897213b249Helmut Schaa /* if we skip this channel return to the decision state */ 6850ee9c13c7c92581ab005d80795cf65897213b249Helmut Schaa local->next_scan_state = SCAN_DECISION; 6862fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa return; 6870ee9c13c7c92581ab005d80795cf65897213b249Helmut Schaa } 6887d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa 6897d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa /* 6907d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa * Probe delay is used to update the NAV, cf. 11.1.3.2.2 6917d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa * (which unfortunately doesn't say _why_ step a) is done, 6927d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa * but it waits for the probe delay or until a frame is 6937d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa * received - and the received frame would update the NAV). 6947d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa * For now, we do not support waiting until a frame is 6957d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa * received. 6967d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa * 6977d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa * In any case, it is not necessary for a passive scan. 6987d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa */ 6998fe02e167efa8ed4a4503a5eedc0f49fcb7e3eb9Luis R. Rodriguez if (chan->flags & IEEE80211_CHAN_NO_IR || 7007d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa !local->scan_req->n_ssids) { 7017d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa *next_delay = IEEE80211_PASSIVE_CHANNEL_TIME; 702977923b00c79185c11b4b47664f5ffa4c3820438Helmut Schaa local->next_scan_state = SCAN_DECISION; 7032fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa return; 7047d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa } 7057d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa 7062fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa /* active scan, send probes */ 7077d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa *next_delay = IEEE80211_PROBE_DELAY; 708977923b00c79185c11b4b47664f5ffa4c3820438Helmut Schaa local->next_scan_state = SCAN_SEND_PROBE; 7097d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa} 7107d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa 71107ef03ee8b280a536b38ccfe512b9556996f0492Johannes Bergstatic void ieee80211_scan_state_suspend(struct ieee80211_local *local, 71207ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg unsigned long *next_delay) 71307ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg{ 71407ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg /* switch back to the operating channel */ 7157ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich local->scan_chandef.chan = NULL; 71607ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); 71707ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg 718aacde9ee45225f7e0b90960f479aef83c66bfdc0Stanislaw Gruszka /* disable PS */ 719aacde9ee45225f7e0b90960f479aef83c66bfdc0Stanislaw Gruszka ieee80211_offchannel_return(local); 72007ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg 72107ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg *next_delay = HZ / 5; 72207ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg /* afterwards, resume scan & go to next channel */ 72307ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg local->next_scan_state = SCAN_RESUME; 72407ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg} 72507ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg 72607ef03ee8b280a536b38ccfe512b9556996f0492Johannes Bergstatic void ieee80211_scan_state_resume(struct ieee80211_local *local, 72707ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg unsigned long *next_delay) 72807ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg{ 729aacde9ee45225f7e0b90960f479aef83c66bfdc0Stanislaw Gruszka ieee80211_offchannel_stop_vifs(local); 73007ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg 73107ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg if (local->ops->flush) { 73239ecc01d1bbe3de2cf5f01a81e176ea5160d3b95Johannes Berg ieee80211_flush_queues(local, NULL); 73307ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg *next_delay = 0; 73407ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg } else 73507ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg *next_delay = HZ / 10; 73607ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg 73707ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg /* remember when we left the operating channel */ 73807ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg local->leave_oper_channel_time = jiffies; 73907ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg 74007ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg /* advance to the next channel to be scanned */ 741de2ee84db6a0201278e35590821cd014cb71830aMohammed Shafi Shajakhan local->next_scan_state = SCAN_SET_CHANNEL; 74207ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg} 74307ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg 744c2b13452b283f9c4a5b02a6b53ed6416ebf4c03cJohannes Bergvoid ieee80211_scan_work(struct work_struct *work) 7450a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg{ 7460a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg struct ieee80211_local *local = 7470a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg container_of(work, struct ieee80211_local, scan_work.work); 748d07bfd8b6f20a81d7ec65c50f35b053d9e3aa740Johannes Berg struct ieee80211_sub_if_data *sdata; 7490a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg unsigned long next_delay = 0; 7508bd2a2489971d3bcdbae6d9d9e9414f04cb0543bEliad Peller bool aborted; 7510a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 752259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka mutex_lock(&local->mtx); 7538789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg 754e2fd5dbc1c7031be5b5de043bcc0a18c7a59a68aJohannes Berg sdata = rcu_dereference_protected(local->scan_sdata, 755e2fd5dbc1c7031be5b5de043bcc0a18c7a59a68aJohannes Berg lockdep_is_held(&local->mtx)); 756d07bfd8b6f20a81d7ec65c50f35b053d9e3aa740Johannes Berg 7578a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear /* When scanning on-channel, the first-callback means completed. */ 7588a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear if (test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning)) { 7598a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear aborted = test_and_clear_bit(SCAN_ABORTED, &local->scanning); 7608a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear goto out_complete; 7618a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear } 7628a690674e0601efbe9a7b16a5826fc522645cca3Ben Greear 763259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka if (test_and_clear_bit(SCAN_COMPLETED, &local->scanning)) { 7648789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg aborted = test_and_clear_bit(SCAN_ABORTED, &local->scanning); 765259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka goto out_complete; 7668789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg } 7678789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg 768259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka if (!sdata || !local->scan_req) 769259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka goto out; 770f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 771fbe9c429f195111bbf7f1630efa19aee295fd8e7Helmut Schaa if (local->scan_req && !local->scanning) { 772f3b85252f081581a8f257545ed748062dce7798bJohannes Berg struct cfg80211_scan_request *req = local->scan_req; 773f3b85252f081581a8f257545ed748062dce7798bJohannes Berg int rc; 774f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 775f3b85252f081581a8f257545ed748062dce7798bJohannes Berg local->scan_req = NULL; 7760c2bef4621c5feb5bda9068c9964b2e9acf57017Monam Agarwal RCU_INIT_POINTER(local->scan_sdata, NULL); 777f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 778f3b85252f081581a8f257545ed748062dce7798bJohannes Berg rc = __ieee80211_start_scan(sdata, req); 779259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka if (rc) { 7803aed49ef17c7bc8397420529ac976fe058818e3dStanislaw Gruszka /* need to complete scan in cfg80211 */ 7813aed49ef17c7bc8397420529ac976fe058818e3dStanislaw Gruszka local->scan_req = req; 782259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka aborted = true; 783259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka goto out_complete; 784259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka } else 785259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka goto out; 786f3b85252f081581a8f257545ed748062dce7798bJohannes Berg } 787f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 7885bc75728fd43bb15b46f16ef465bcf9d487393cfJohannes Berg /* 789f502d09b750437a4ec9c63333acf1070fe7958afHelmut Schaa * as long as no delay is required advance immediately 790f502d09b750437a4ec9c63333acf1070fe7958afHelmut Schaa * without scheduling a new work 791f502d09b750437a4ec9c63333acf1070fe7958afHelmut Schaa */ 792f502d09b750437a4ec9c63333acf1070fe7958afHelmut Schaa do { 793c29acf201007a6d73223f864f52406eb5ba19933Rajkumar Manoharan if (!ieee80211_sdata_running(sdata)) { 794c29acf201007a6d73223f864f52406eb5ba19933Rajkumar Manoharan aborted = true; 795c29acf201007a6d73223f864f52406eb5ba19933Rajkumar Manoharan goto out_complete; 796c29acf201007a6d73223f864f52406eb5ba19933Rajkumar Manoharan } 797c29acf201007a6d73223f864f52406eb5ba19933Rajkumar Manoharan 798977923b00c79185c11b4b47664f5ffa4c3820438Helmut Schaa switch (local->next_scan_state) { 7992fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa case SCAN_DECISION: 800e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka /* if no more bands/channels left, complete scan */ 801e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka if (local->scan_channel_idx >= local->scan_req->n_channels) { 802e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka aborted = false; 803e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka goto out_complete; 804e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka } 805e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka ieee80211_scan_state_decision(local, &next_delay); 806f502d09b750437a4ec9c63333acf1070fe7958afHelmut Schaa break; 8072fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa case SCAN_SET_CHANNEL: 8082fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa ieee80211_scan_state_set_channel(local, &next_delay); 8092fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa break; 810f502d09b750437a4ec9c63333acf1070fe7958afHelmut Schaa case SCAN_SEND_PROBE: 811f502d09b750437a4ec9c63333acf1070fe7958afHelmut Schaa ieee80211_scan_state_send_probe(local, &next_delay); 812f502d09b750437a4ec9c63333acf1070fe7958afHelmut Schaa break; 81307ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg case SCAN_SUSPEND: 81407ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg ieee80211_scan_state_suspend(local, &next_delay); 815142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa break; 81607ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg case SCAN_RESUME: 81707ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg ieee80211_scan_state_resume(local, &next_delay); 818142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa break; 819cd2bb512cda58f1efb922ad6dc29013ea5d5d9d0Sam Leffler case SCAN_ABORT: 820cd2bb512cda58f1efb922ad6dc29013ea5d5d9d0Sam Leffler aborted = true; 821cd2bb512cda58f1efb922ad6dc29013ea5d5d9d0Sam Leffler goto out_complete; 822f502d09b750437a4ec9c63333acf1070fe7958afHelmut Schaa } 823f502d09b750437a4ec9c63333acf1070fe7958afHelmut Schaa } while (next_delay == 0); 8240a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 82542935ecaf4e784d0815afa9a7e5fe7e141157ca3Luis R. Rodriguez ieee80211_queue_delayed_work(&local->hw, &local->scan_work, next_delay); 826d07bfd8b6f20a81d7ec65c50f35b053d9e3aa740Johannes Berg goto out; 827259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka 828259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszkaout_complete: 8298bd2a2489971d3bcdbae6d9d9e9414f04cb0543bEliad Peller __ieee80211_scan_completed(&local->hw, aborted); 830259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszkaout: 831259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka mutex_unlock(&local->mtx); 8320a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg} 8330a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 834f3b85252f081581a8f257545ed748062dce7798bJohannes Bergint ieee80211_request_scan(struct ieee80211_sub_if_data *sdata, 835f3b85252f081581a8f257545ed748062dce7798bJohannes Berg struct cfg80211_scan_request *req) 8360a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg{ 837f3b85252f081581a8f257545ed748062dce7798bJohannes Berg int res; 838de95a54b1aebe5592cae971ca5e5d9ec6a381a17Johannes Berg 839a1699b75a1db31a1da2f0fc610ee696d02a19280Johannes Berg mutex_lock(&sdata->local->mtx); 840f3b85252f081581a8f257545ed748062dce7798bJohannes Berg res = __ieee80211_start_scan(sdata, req); 841a1699b75a1db31a1da2f0fc610ee696d02a19280Johannes Berg mutex_unlock(&sdata->local->mtx); 8420a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 843f3b85252f081581a8f257545ed748062dce7798bJohannes Berg return res; 8440a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg} 8450a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 84634bcf71502413f8903ade93746f2d0f04b937a78Stanislaw Gruszkaint ieee80211_request_ibss_scan(struct ieee80211_sub_if_data *sdata, 84734bcf71502413f8903ade93746f2d0f04b937a78Stanislaw Gruszka const u8 *ssid, u8 ssid_len, 8487ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich struct ieee80211_channel *chan, 8497ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich enum nl80211_bss_scan_width scan_width) 8500a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg{ 8510a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg struct ieee80211_local *local = sdata->local; 852f3b85252f081581a8f257545ed748062dce7798bJohannes Berg int ret = -EBUSY; 853fb63bc41772259701a827e9a6117219a7393554fGertjan van Wingerde enum ieee80211_band band; 8542a5193119269062608582418deba7af82844159aJohannes Berg 855a1699b75a1db31a1da2f0fc610ee696d02a19280Johannes Berg mutex_lock(&local->mtx); 8560a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 857f3b85252f081581a8f257545ed748062dce7798bJohannes Berg /* busy scanning */ 858f3b85252f081581a8f257545ed748062dce7798bJohannes Berg if (local->scan_req) 859f3b85252f081581a8f257545ed748062dce7798bJohannes Berg goto unlock; 8609116dd01120e249dc2e84e6edecd7ad7f828680fJohannes Berg 861be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg /* fill internal scan request */ 862be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg if (!chan) { 86334bcf71502413f8903ade93746f2d0f04b937a78Stanislaw Gruszka int i, max_n; 86434bcf71502413f8903ade93746f2d0f04b937a78Stanislaw Gruszka int n_ch = 0; 865be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg 866be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 867be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg if (!local->hw.wiphy->bands[band]) 868be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg continue; 86934bcf71502413f8903ade93746f2d0f04b937a78Stanislaw Gruszka 87034bcf71502413f8903ade93746f2d0f04b937a78Stanislaw Gruszka max_n = local->hw.wiphy->bands[band]->n_channels; 87134bcf71502413f8903ade93746f2d0f04b937a78Stanislaw Gruszka for (i = 0; i < max_n; i++) { 87234bcf71502413f8903ade93746f2d0f04b937a78Stanislaw Gruszka struct ieee80211_channel *tmp_ch = 873be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg &local->hw.wiphy->bands[band]->channels[i]; 87434bcf71502413f8903ade93746f2d0f04b937a78Stanislaw Gruszka 8758fe02e167efa8ed4a4503a5eedc0f49fcb7e3eb9Luis R. Rodriguez if (tmp_ch->flags & (IEEE80211_CHAN_NO_IR | 87634bcf71502413f8903ade93746f2d0f04b937a78Stanislaw Gruszka IEEE80211_CHAN_DISABLED)) 87734bcf71502413f8903ade93746f2d0f04b937a78Stanislaw Gruszka continue; 87834bcf71502413f8903ade93746f2d0f04b937a78Stanislaw Gruszka 87934bcf71502413f8903ade93746f2d0f04b937a78Stanislaw Gruszka local->int_scan_req->channels[n_ch] = tmp_ch; 88034bcf71502413f8903ade93746f2d0f04b937a78Stanislaw Gruszka n_ch++; 881be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg } 882be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg } 883be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg 88434bcf71502413f8903ade93746f2d0f04b937a78Stanislaw Gruszka if (WARN_ON_ONCE(n_ch == 0)) 88534bcf71502413f8903ade93746f2d0f04b937a78Stanislaw Gruszka goto unlock; 88634bcf71502413f8903ade93746f2d0f04b937a78Stanislaw Gruszka 88734bcf71502413f8903ade93746f2d0f04b937a78Stanislaw Gruszka local->int_scan_req->n_channels = n_ch; 888be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg } else { 8898fe02e167efa8ed4a4503a5eedc0f49fcb7e3eb9Luis R. Rodriguez if (WARN_ON_ONCE(chan->flags & (IEEE80211_CHAN_NO_IR | 89034bcf71502413f8903ade93746f2d0f04b937a78Stanislaw Gruszka IEEE80211_CHAN_DISABLED))) 89134bcf71502413f8903ade93746f2d0f04b937a78Stanislaw Gruszka goto unlock; 89234bcf71502413f8903ade93746f2d0f04b937a78Stanislaw Gruszka 893be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg local->int_scan_req->channels[0] = chan; 894be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg local->int_scan_req->n_channels = 1; 895be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg } 896be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg 897be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg local->int_scan_req->ssids = &local->scan_ssid; 898be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg local->int_scan_req->n_ssids = 1; 8997ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich local->int_scan_req->scan_width = scan_width; 9005ba63533bbf653631faab60f6988506160ec6ba4Johannes Berg memcpy(local->int_scan_req->ssids[0].ssid, ssid, IEEE80211_MAX_SSID_LEN); 9015ba63533bbf653631faab60f6988506160ec6ba4Johannes Berg local->int_scan_req->ssids[0].ssid_len = ssid_len; 9029116dd01120e249dc2e84e6edecd7ad7f828680fJohannes Berg 9035ba63533bbf653631faab60f6988506160ec6ba4Johannes Berg ret = __ieee80211_start_scan(sdata, sdata->local->int_scan_req); 904f3b85252f081581a8f257545ed748062dce7798bJohannes Berg unlock: 905a1699b75a1db31a1da2f0fc610ee696d02a19280Johannes Berg mutex_unlock(&local->mtx); 906f3b85252f081581a8f257545ed748062dce7798bJohannes Berg return ret; 9070a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg} 9085bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg 9094136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka/* 9104136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * Only call this function when a scan can't be queued -- under RTNL. 9114136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka */ 9125bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Bergvoid ieee80211_scan_cancel(struct ieee80211_local *local) 9135bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg{ 9145bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg /* 915b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller * We are canceling software scan, or deferred scan that was not 9164136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * yet really started (see __ieee80211_start_scan ). 9174136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * 9184136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * Regarding hardware scan: 9194136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * - we can not call __ieee80211_scan_completed() as when 9204136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * SCAN_HW_SCANNING bit is set this function change 9214136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * local->hw_scan_req to operate on 5G band, what race with 9224136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * driver which can use local->hw_scan_req 9234136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * 9244136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * - we can not cancel scan_work since driver can schedule it 9254136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * by ieee80211_scan_completed(..., true) to finish scan 9264136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * 927b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller * Hence we only call the cancel_hw_scan() callback, but the low-level 928b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller * driver is still responsible for calling ieee80211_scan_completed() 929b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller * after the scan was completed/aborted. 9305bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg */ 9314136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka 932a1699b75a1db31a1da2f0fc610ee696d02a19280Johannes Berg mutex_lock(&local->mtx); 933b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller if (!local->scan_req) 934b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller goto out; 935b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller 936a754055a1296fcbe6f32de3a5eaca6efb2fd1865Emmanuel Grumbach /* 937a754055a1296fcbe6f32de3a5eaca6efb2fd1865Emmanuel Grumbach * We have a scan running and the driver already reported completion, 938a754055a1296fcbe6f32de3a5eaca6efb2fd1865Emmanuel Grumbach * but the worker hasn't run yet or is stuck on the mutex - mark it as 939a754055a1296fcbe6f32de3a5eaca6efb2fd1865Emmanuel Grumbach * cancelled. 940a754055a1296fcbe6f32de3a5eaca6efb2fd1865Emmanuel Grumbach */ 941a754055a1296fcbe6f32de3a5eaca6efb2fd1865Emmanuel Grumbach if (test_bit(SCAN_HW_SCANNING, &local->scanning) && 942a754055a1296fcbe6f32de3a5eaca6efb2fd1865Emmanuel Grumbach test_bit(SCAN_COMPLETED, &local->scanning)) { 943a754055a1296fcbe6f32de3a5eaca6efb2fd1865Emmanuel Grumbach set_bit(SCAN_HW_CANCELLED, &local->scanning); 944a754055a1296fcbe6f32de3a5eaca6efb2fd1865Emmanuel Grumbach goto out; 945a754055a1296fcbe6f32de3a5eaca6efb2fd1865Emmanuel Grumbach } 946a754055a1296fcbe6f32de3a5eaca6efb2fd1865Emmanuel Grumbach 947b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller if (test_bit(SCAN_HW_SCANNING, &local->scanning)) { 948a754055a1296fcbe6f32de3a5eaca6efb2fd1865Emmanuel Grumbach /* 949a754055a1296fcbe6f32de3a5eaca6efb2fd1865Emmanuel Grumbach * Make sure that __ieee80211_scan_completed doesn't trigger a 950a754055a1296fcbe6f32de3a5eaca6efb2fd1865Emmanuel Grumbach * scan on another band. 951a754055a1296fcbe6f32de3a5eaca6efb2fd1865Emmanuel Grumbach */ 952a754055a1296fcbe6f32de3a5eaca6efb2fd1865Emmanuel Grumbach set_bit(SCAN_HW_CANCELLED, &local->scanning); 953b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller if (local->ops->cancel_hw_scan) 954e2fd5dbc1c7031be5b5de043bcc0a18c7a59a68aJohannes Berg drv_cancel_hw_scan(local, 955e2fd5dbc1c7031be5b5de043bcc0a18c7a59a68aJohannes Berg rcu_dereference_protected(local->scan_sdata, 956e2fd5dbc1c7031be5b5de043bcc0a18c7a59a68aJohannes Berg lockdep_is_held(&local->mtx))); 957b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller goto out; 9584136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka } 959b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller 960b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller /* 961b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller * If the work is currently running, it must be blocked on 962b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller * the mutex, but we'll set scan_sdata = NULL and it'll 963b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller * simply exit once it acquires the mutex. 964b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller */ 965b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller cancel_delayed_work(&local->scan_work); 966b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller /* and clean up */ 9678bd2a2489971d3bcdbae6d9d9e9414f04cb0543bEliad Peller __ieee80211_scan_completed(&local->hw, true); 968b856439b1b54358e580aaee5dbe683af5ada9403Eliad Pellerout: 969d07bfd8b6f20a81d7ec65c50f35b053d9e3aa740Johannes Berg mutex_unlock(&local->mtx); 9705bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg} 97179f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 972d43c6b6e6f2fcaebf198c499716e5e24d878fdd2David Spinadelint __ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata, 973d43c6b6e6f2fcaebf198c499716e5e24d878fdd2David Spinadel struct cfg80211_sched_scan_request *req) 97479f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho{ 97579f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho struct ieee80211_local *local = sdata->local; 976bca1e29fb54c51856dda6772d488d41b10ed91daDavid Spinadel struct ieee80211_sched_scan_ies sched_scan_ies = {}; 9772103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich struct cfg80211_chan_def chandef; 978c604b9f219422e969fe371cc7259de34c3c5601dJohannes Berg int ret, i, iebufsz; 979c604b9f219422e969fe371cc7259de34c3c5601dJohannes Berg 980e4dcbb375cd829e1649b12e0ab7d7e5b7efcb5a5David Spinadel iebufsz = local->scan_ies_len + req->ie_len; 98179f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 982d43c6b6e6f2fcaebf198c499716e5e24d878fdd2David Spinadel lockdep_assert_held(&local->mtx); 98379f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 984d43c6b6e6f2fcaebf198c499716e5e24d878fdd2David Spinadel if (!local->ops->sched_scan_start) 985d43c6b6e6f2fcaebf198c499716e5e24d878fdd2David Spinadel return -ENOTSUPP; 98679f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 98779f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho for (i = 0; i < IEEE80211_NUM_BANDS; i++) { 988d811b3d5566f1441b321a1219c260124b209e0bdArik Nemtsov if (!local->hw.wiphy->bands[i]) 989d811b3d5566f1441b321a1219c260124b209e0bdArik Nemtsov continue; 990d811b3d5566f1441b321a1219c260124b209e0bdArik Nemtsov 991c604b9f219422e969fe371cc7259de34c3c5601dJohannes Berg sched_scan_ies.ie[i] = kzalloc(iebufsz, GFP_KERNEL); 99230dd3edf97abda301150c8cf26fed21e53e3a9ceJohannes Berg if (!sched_scan_ies.ie[i]) { 99379f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho ret = -ENOMEM; 99479f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho goto out_free; 99579f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho } 99679f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 9972103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich ieee80211_prepare_scan_chandef(&chandef, req->scan_width); 9982103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich 99930dd3edf97abda301150c8cf26fed21e53e3a9ceJohannes Berg sched_scan_ies.len[i] = 100030dd3edf97abda301150c8cf26fed21e53e3a9ceJohannes Berg ieee80211_build_preq_ies(local, sched_scan_ies.ie[i], 1001c604b9f219422e969fe371cc7259de34c3c5601dJohannes Berg iebufsz, req->ie, req->ie_len, 10022103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich i, (u32) -1, &chandef); 100379f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho } 100479f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 100530dd3edf97abda301150c8cf26fed21e53e3a9ceJohannes Berg ret = drv_sched_scan_start(local, sdata, req, &sched_scan_ies); 1006d43c6b6e6f2fcaebf198c499716e5e24d878fdd2David Spinadel if (ret == 0) { 10075260a5b2c3524f198ea062fe0a6a4faa724e6a9dJohannes Berg rcu_assign_pointer(local->sched_scan_sdata, sdata); 1008d43c6b6e6f2fcaebf198c499716e5e24d878fdd2David Spinadel local->sched_scan_req = req; 1009d43c6b6e6f2fcaebf198c499716e5e24d878fdd2David Spinadel } 101079f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 101179f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelhoout_free: 101279f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho while (i > 0) 101330dd3edf97abda301150c8cf26fed21e53e3a9ceJohannes Berg kfree(sched_scan_ies.ie[--i]); 1014d43c6b6e6f2fcaebf198c499716e5e24d878fdd2David Spinadel 1015d43c6b6e6f2fcaebf198c499716e5e24d878fdd2David Spinadel if (ret) { 1016d43c6b6e6f2fcaebf198c499716e5e24d878fdd2David Spinadel /* Clean in case of failure after HW restart or upon resume. */ 10170c2bef4621c5feb5bda9068c9964b2e9acf57017Monam Agarwal RCU_INIT_POINTER(local->sched_scan_sdata, NULL); 1018d43c6b6e6f2fcaebf198c499716e5e24d878fdd2David Spinadel local->sched_scan_req = NULL; 1019d43c6b6e6f2fcaebf198c499716e5e24d878fdd2David Spinadel } 1020d43c6b6e6f2fcaebf198c499716e5e24d878fdd2David Spinadel 1021d43c6b6e6f2fcaebf198c499716e5e24d878fdd2David Spinadel return ret; 1022d43c6b6e6f2fcaebf198c499716e5e24d878fdd2David Spinadel} 1023d43c6b6e6f2fcaebf198c499716e5e24d878fdd2David Spinadel 1024d43c6b6e6f2fcaebf198c499716e5e24d878fdd2David Spinadelint ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata, 1025d43c6b6e6f2fcaebf198c499716e5e24d878fdd2David Spinadel struct cfg80211_sched_scan_request *req) 1026d43c6b6e6f2fcaebf198c499716e5e24d878fdd2David Spinadel{ 1027d43c6b6e6f2fcaebf198c499716e5e24d878fdd2David Spinadel struct ieee80211_local *local = sdata->local; 1028d43c6b6e6f2fcaebf198c499716e5e24d878fdd2David Spinadel int ret; 1029d43c6b6e6f2fcaebf198c499716e5e24d878fdd2David Spinadel 1030d43c6b6e6f2fcaebf198c499716e5e24d878fdd2David Spinadel mutex_lock(&local->mtx); 1031d43c6b6e6f2fcaebf198c499716e5e24d878fdd2David Spinadel 1032d43c6b6e6f2fcaebf198c499716e5e24d878fdd2David Spinadel if (rcu_access_pointer(local->sched_scan_sdata)) { 1033d43c6b6e6f2fcaebf198c499716e5e24d878fdd2David Spinadel mutex_unlock(&local->mtx); 1034d43c6b6e6f2fcaebf198c499716e5e24d878fdd2David Spinadel return -EBUSY; 1035d43c6b6e6f2fcaebf198c499716e5e24d878fdd2David Spinadel } 1036d43c6b6e6f2fcaebf198c499716e5e24d878fdd2David Spinadel 1037d43c6b6e6f2fcaebf198c499716e5e24d878fdd2David Spinadel ret = __ieee80211_request_sched_scan_start(sdata, req); 1038d43c6b6e6f2fcaebf198c499716e5e24d878fdd2David Spinadel 10395260a5b2c3524f198ea062fe0a6a4faa724e6a9dJohannes Berg mutex_unlock(&local->mtx); 104079f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho return ret; 104179f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho} 104279f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 104385a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelhoint ieee80211_request_sched_scan_stop(struct ieee80211_sub_if_data *sdata) 104479f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho{ 104579f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho struct ieee80211_local *local = sdata->local; 104630dd3edf97abda301150c8cf26fed21e53e3a9ceJohannes Berg int ret = 0; 104779f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 10485260a5b2c3524f198ea062fe0a6a4faa724e6a9dJohannes Berg mutex_lock(&local->mtx); 104979f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 105079f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho if (!local->ops->sched_scan_stop) { 105179f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho ret = -ENOTSUPP; 105279f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho goto out; 105379f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho } 105479f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 1055d43c6b6e6f2fcaebf198c499716e5e24d878fdd2David Spinadel /* We don't want to restart sched scan anymore. */ 1056d43c6b6e6f2fcaebf198c499716e5e24d878fdd2David Spinadel local->sched_scan_req = NULL; 1057d43c6b6e6f2fcaebf198c499716e5e24d878fdd2David Spinadel 105871228a1eabaf7fa4b2c3060cfee60875254cec14Alexander Bondar if (rcu_access_pointer(local->sched_scan_sdata)) { 105937e3308cb2b6933019d9d9c2045877d6d68d9c5aJohannes Berg ret = drv_sched_scan_stop(local, sdata); 106071228a1eabaf7fa4b2c3060cfee60875254cec14Alexander Bondar if (!ret) 106171228a1eabaf7fa4b2c3060cfee60875254cec14Alexander Bondar rcu_assign_pointer(local->sched_scan_sdata, NULL); 106271228a1eabaf7fa4b2c3060cfee60875254cec14Alexander Bondar } 106379f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelhoout: 10645260a5b2c3524f198ea062fe0a6a4faa724e6a9dJohannes Berg mutex_unlock(&local->mtx); 106579f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 106679f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho return ret; 106779f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho} 106879f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 106979f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelhovoid ieee80211_sched_scan_results(struct ieee80211_hw *hw) 107079f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho{ 107179f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho struct ieee80211_local *local = hw_to_local(hw); 107279f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 107379f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho trace_api_sched_scan_results(local); 107479f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 107579f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho cfg80211_sched_scan_results(hw->wiphy); 107679f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho} 107779f460ca49d8d5700756ab7071c951311c7f29ccLuciano CoelhoEXPORT_SYMBOL(ieee80211_sched_scan_results); 107879f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 107985a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelhovoid ieee80211_sched_scan_stopped_work(struct work_struct *work) 108085a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho{ 108185a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho struct ieee80211_local *local = 108285a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho container_of(work, struct ieee80211_local, 108385a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho sched_scan_stopped_work); 108485a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho 108585a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho mutex_lock(&local->mtx); 108685a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho 10875260a5b2c3524f198ea062fe0a6a4faa724e6a9dJohannes Berg if (!rcu_access_pointer(local->sched_scan_sdata)) { 108885a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho mutex_unlock(&local->mtx); 108985a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho return; 109085a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho } 109185a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho 10920c2bef4621c5feb5bda9068c9964b2e9acf57017Monam Agarwal RCU_INIT_POINTER(local->sched_scan_sdata, NULL); 109385a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho 1094d43c6b6e6f2fcaebf198c499716e5e24d878fdd2David Spinadel /* If sched scan was aborted by the driver. */ 1095d43c6b6e6f2fcaebf198c499716e5e24d878fdd2David Spinadel local->sched_scan_req = NULL; 1096d43c6b6e6f2fcaebf198c499716e5e24d878fdd2David Spinadel 109785a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho mutex_unlock(&local->mtx); 109885a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho 109985a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho cfg80211_sched_scan_stopped(local->hw.wiphy); 110085a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho} 110185a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho 110279f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelhovoid ieee80211_sched_scan_stopped(struct ieee80211_hw *hw) 110379f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho{ 110479f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho struct ieee80211_local *local = hw_to_local(hw); 110579f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 110679f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho trace_api_sched_scan_stopped(local); 110779f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 110818db594a1005d908d995a2fc8f5a7bf4286fdca0Johannes Berg schedule_work(&local->sched_scan_stopped_work); 110979f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho} 111079f460ca49d8d5700756ab7071c951311c7f29ccLuciano CoelhoEXPORT_SYMBOL(ieee80211_sched_scan_stopped); 1111