Blame view
net/mac80211/scan.c
37 KB
d2912cb15 treewide: Replace... |
1 |
// SPDX-License-Identifier: GPL-2.0-only |
0a51b27e9 mac80211: start m... |
2 |
/* |
5484e2374 mac80211: move BS... |
3 4 |
* Scanning implementation * |
0a51b27e9 mac80211: start m... |
5 6 7 8 9 |
* Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi> * Copyright 2004, Instant802 Networks, Inc. * Copyright 2005, Devicescape Software, Inc. * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> * Copyright 2007, Michael Wu <flamingice@sourmilk.net> |
74d803b60 mac80211: ignore ... |
10 |
* Copyright 2013-2015 Intel Mobile Communications GmbH |
40b0bd249 mac80211: oce: en... |
11 |
* Copyright 2016-2017 Intel Deutschland GmbH |
4abb52a46 mac80211: pass bs... |
12 |
* Copyright (C) 2018-2019 Intel Corporation |
0a51b27e9 mac80211: start m... |
13 |
*/ |
0a51b27e9 mac80211: start m... |
14 |
#include <linux/if_arp.h> |
888d04dfb mac80211: use com... |
15 |
#include <linux/etherdevice.h> |
078e1e60d mac80211: Add cap... |
16 |
#include <linux/rtnetlink.h> |
df13cce53 mac80211: Improve... |
17 |
#include <net/sch_generic.h> |
5a0e3ad6a include cleanup: ... |
18 |
#include <linux/slab.h> |
bc3b2d7fb net: Add export.h... |
19 |
#include <linux/export.h> |
b9771d41a mac80211: support... |
20 |
#include <linux/random.h> |
0a51b27e9 mac80211: start m... |
21 |
#include <net/mac80211.h> |
0a51b27e9 mac80211: start m... |
22 23 |
#include "ieee80211_i.h" |
244879813 mac80211: add dri... |
24 |
#include "driver-ops.h" |
5484e2374 mac80211: move BS... |
25 |
#include "mesh.h" |
0a51b27e9 mac80211: start m... |
26 27 28 |
#define IEEE80211_PROBE_DELAY (HZ / 33) #define IEEE80211_CHANNEL_TIME (HZ / 33) |
3f892b61a mac80211: improve... |
29 |
#define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 9) |
0a51b27e9 mac80211: start m... |
30 |
|
5484e2374 mac80211: move BS... |
31 |
void ieee80211_rx_bss_put(struct ieee80211_local *local, |
c2b13452b mac80211: clean u... |
32 |
struct ieee80211_bss *bss) |
5484e2374 mac80211: move BS... |
33 |
{ |
0c1ad2cac mac80211: proper ... |
34 35 |
if (!bss) return; |
5b112d3d0 cfg80211: pass wi... |
36 37 |
cfg80211_put_bss(local->hw.wiphy, container_of((void *)bss, struct cfg80211_bss, priv)); |
5484e2374 mac80211: move BS... |
38 |
} |
ab13315af mac80211: add U-A... |
39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 |
static bool is_uapsd_supported(struct ieee802_11_elems *elems) { u8 qos_info; if (elems->wmm_info && elems->wmm_info_len == 7 && elems->wmm_info[5] == 1) qos_info = elems->wmm_info[6]; else if (elems->wmm_param && elems->wmm_param_len == 24 && elems->wmm_param[5] == 1) qos_info = elems->wmm_param[6]; else /* no valid wmm information or parameter element found */ return false; return qos_info & IEEE80211_WMM_IE_AP_QOSINFO_UAPSD; } |
fcea7db50 mac80211: move th... |
55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 |
static void ieee80211_update_bss_from_elems(struct ieee80211_local *local, struct ieee80211_bss *bss, struct ieee802_11_elems *elems, struct ieee80211_rx_status *rx_status, bool beacon) { int clen, srlen; if (beacon) bss->device_ts_beacon = rx_status->device_timestamp; else bss->device_ts_presp = rx_status->device_timestamp; if (elems->parse_error) { if (beacon) bss->corrupt_data |= IEEE80211_BSS_CORRUPT_BEACON; else bss->corrupt_data |= IEEE80211_BSS_CORRUPT_PROBE_RESP; } else { if (beacon) bss->corrupt_data &= ~IEEE80211_BSS_CORRUPT_BEACON; else bss->corrupt_data &= ~IEEE80211_BSS_CORRUPT_PROBE_RESP; } /* save the ERP value so that it is available at association time */ if (elems->erp_info && (!elems->parse_error || !(bss->valid_data & IEEE80211_BSS_VALID_ERP))) { bss->erp_value = elems->erp_info[0]; bss->has_erp_value = true; if (!elems->parse_error) bss->valid_data |= IEEE80211_BSS_VALID_ERP; } /* replace old supported rates if we get new values */ if (!elems->parse_error || !(bss->valid_data & IEEE80211_BSS_VALID_RATES)) { srlen = 0; if (elems->supp_rates) { clen = IEEE80211_MAX_SUPP_RATES; if (clen > elems->supp_rates_len) clen = elems->supp_rates_len; memcpy(bss->supp_rates, elems->supp_rates, clen); srlen += clen; } if (elems->ext_supp_rates) { clen = IEEE80211_MAX_SUPP_RATES - srlen; if (clen > elems->ext_supp_rates_len) clen = elems->ext_supp_rates_len; memcpy(bss->supp_rates + srlen, elems->ext_supp_rates, clen); srlen += clen; } if (srlen) { bss->supp_rates_len = srlen; if (!elems->parse_error) bss->valid_data |= IEEE80211_BSS_VALID_RATES; } } if (!elems->parse_error || !(bss->valid_data & IEEE80211_BSS_VALID_WMM)) { bss->wmm_used = elems->wmm_param || elems->wmm_info; bss->uapsd_supported = is_uapsd_supported(elems); if (!elems->parse_error) bss->valid_data |= IEEE80211_BSS_VALID_WMM; } if (beacon) { struct ieee80211_supported_band *sband = local->hw.wiphy->bands[rx_status->band]; if (!(rx_status->encoding == RX_ENC_HT) && !(rx_status->encoding == RX_ENC_VHT)) bss->beacon_rate = &sband->bitrates[rx_status->rate_idx]; } } |
c2b13452b mac80211: clean u... |
133 |
struct ieee80211_bss * |
5484e2374 mac80211: move BS... |
134 135 |
ieee80211_bss_info_update(struct ieee80211_local *local, struct ieee80211_rx_status *rx_status, |
d45c41722 mac82011: use fra... |
136 |
struct ieee80211_mgmt *mgmt, size_t len, |
d45c41722 mac82011: use fra... |
137 |
struct ieee80211_channel *channel) |
5484e2374 mac80211: move BS... |
138 |
{ |
d45c41722 mac82011: use fra... |
139 |
bool beacon = ieee80211_is_beacon(mgmt->frame_control); |
78ac51f81 mac80211: support... |
140 141 |
struct cfg80211_bss *cbss, *non_tx_cbss; struct ieee80211_bss *bss, *non_tx_bss; |
162dd6a72 mac80211: allow d... |
142 143 144 |
struct cfg80211_inform_bss bss_meta = { .boottime_ns = rx_status->boottime_ns, }; |
74d803b60 mac80211: ignore ... |
145 |
bool signal_valid; |
7947d3e07 mac80211: Add sup... |
146 |
struct ieee80211_sub_if_data *scan_sdata; |
4abb52a46 mac80211: pass bs... |
147 148 149 |
struct ieee802_11_elems elems; size_t baselen; u8 *elements; |
2a5193119 cfg80211/nl80211:... |
150 |
|
1ad22fb5b mac80211: inform ... |
151 152 153 |
if (rx_status->flag & RX_FLAG_NO_SIGNAL_VAL) bss_meta.signal = 0; /* invalid signal indication */ else if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) |
61f6bba00 mac80211: use new... |
154 |
bss_meta.signal = rx_status->signal * 100; |
30686bf7f mac80211: convert... |
155 |
else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) |
61f6bba00 mac80211: use new... |
156 |
bss_meta.signal = (rx_status->signal * 100) / local->hw.max_signal; |
2a5193119 cfg80211/nl80211:... |
157 |
|
61f6bba00 mac80211: use new... |
158 |
bss_meta.scan_width = NL80211_BSS_CHAN_WIDTH_20; |
da6a4352e mac80211: separat... |
159 |
if (rx_status->bw == RATE_INFO_BW_5) |
61f6bba00 mac80211: use new... |
160 |
bss_meta.scan_width = NL80211_BSS_CHAN_WIDTH_5; |
da6a4352e mac80211: separat... |
161 |
else if (rx_status->bw == RATE_INFO_BW_10) |
61f6bba00 mac80211: use new... |
162 |
bss_meta.scan_width = NL80211_BSS_CHAN_WIDTH_10; |
7ca15a0ae mac80211: allow s... |
163 |
|
61f6bba00 mac80211: use new... |
164 |
bss_meta.chan = channel; |
7947d3e07 mac80211: Add sup... |
165 166 167 168 169 170 171 172 173 174 175 176 177 |
rcu_read_lock(); scan_sdata = rcu_dereference(local->scan_sdata); if (scan_sdata && scan_sdata->vif.type == NL80211_IFTYPE_STATION && scan_sdata->vif.bss_conf.assoc && ieee80211_have_rx_timestamp(rx_status)) { bss_meta.parent_tsf = ieee80211_calculate_rx_timestamp(local, rx_status, len + FCS_LEN, 24); ether_addr_copy(bss_meta.parent_bssid, scan_sdata->vif.bss_conf.bssid); } rcu_read_unlock(); |
61f6bba00 mac80211: use new... |
178 179 |
cbss = cfg80211_inform_bss_frame_data(local->hw.wiphy, &bss_meta, mgmt, len, GFP_ATOMIC); |
0c1ad2cac mac80211: proper ... |
180 |
if (!cbss) |
00d3f14cf mac80211: use cfg... |
181 |
return NULL; |
4abb52a46 mac80211: pass bs... |
182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 |
if (ieee80211_is_probe_resp(mgmt->frame_control)) { elements = mgmt->u.probe_resp.variable; baselen = offsetof(struct ieee80211_mgmt, u.probe_resp.variable); } else { baselen = offsetof(struct ieee80211_mgmt, u.beacon.variable); elements = mgmt->u.beacon.variable; } if (baselen > len) return NULL; ieee802_11_parse_elems(elements, len - baselen, false, &elems, mgmt->bssid, cbss->bssid); |
74d803b60 mac80211: ignore ... |
197 198 199 200 201 |
/* In case the signal is invalid update the status */ signal_valid = abs(channel->center_freq - cbss->channel->center_freq) <= local->hw.wiphy->max_adj_channel_rssi_comp; if (!signal_valid) rx_status->flag |= RX_FLAG_NO_SIGNAL_VAL; |
00d3f14cf mac80211: use cfg... |
202 |
|
0c1ad2cac mac80211: proper ... |
203 |
bss = (void *)cbss->priv; |
fcea7db50 mac80211: move th... |
204 |
ieee80211_update_bss_from_elems(local, bss, &elems, rx_status, beacon); |
817cee767 mac80211: track A... |
205 |
|
78ac51f81 mac80211: support... |
206 207 208 209 210 211 |
list_for_each_entry(non_tx_cbss, &cbss->nontrans_list, nontrans_list) { non_tx_bss = (void *)non_tx_cbss->priv; ieee80211_update_bss_from_elems(local, non_tx_bss, &elems, rx_status, beacon); } |
5484e2374 mac80211: move BS... |
212 213 |
return bss; } |
0a51b27e9 mac80211: start m... |
214 |
|
40b0bd249 mac80211: oce: en... |
215 216 217 218 219 220 221 222 223 224 225 226 227 |
static bool ieee80211_scan_accept_presp(struct ieee80211_sub_if_data *sdata, u32 scan_flags, const u8 *da) { if (!sdata) return false; /* accept broadcast for OCE */ if (scan_flags & NL80211_SCAN_FLAG_ACCEPT_BCAST_PROBE_RESP && is_broadcast_ether_addr(da)) return true; if (scan_flags & NL80211_SCAN_FLAG_RANDOM_ADDR) return true; return ether_addr_equal(da, sdata->vif.addr); } |
d48b29685 mac80211: redesig... |
228 |
void ieee80211_scan_rx(struct ieee80211_local *local, struct sk_buff *skb) |
98c8fccfa mac80211: refacto... |
229 |
{ |
f1d58c252 mac80211: push rx... |
230 |
struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb); |
d48b29685 mac80211: redesig... |
231 232 |
struct ieee80211_sub_if_data *sdata1, *sdata2; struct ieee80211_mgmt *mgmt = (void *)skb->data; |
c2b13452b mac80211: clean u... |
233 |
struct ieee80211_bss *bss; |
98c8fccfa mac80211: refacto... |
234 |
struct ieee80211_channel *channel; |
98c8fccfa mac80211: refacto... |
235 |
|
d48b29685 mac80211: redesig... |
236 237 238 239 |
if (skb->len < 24 || (!ieee80211_is_probe_resp(mgmt->frame_control) && !ieee80211_is_beacon(mgmt->frame_control))) return; |
98c8fccfa mac80211: refacto... |
240 |
|
d48b29685 mac80211: redesig... |
241 242 |
sdata1 = rcu_dereference(local->scan_sdata); sdata2 = rcu_dereference(local->sched_scan_sdata); |
98c8fccfa mac80211: refacto... |
243 |
|
d48b29685 mac80211: redesig... |
244 245 |
if (likely(!sdata1 && !sdata2)) return; |
98c8fccfa mac80211: refacto... |
246 |
|
d48b29685 mac80211: redesig... |
247 |
if (ieee80211_is_probe_resp(mgmt->frame_control)) { |
a344d6778 mac80211: allow d... |
248 249 |
struct cfg80211_scan_request *scan_req; struct cfg80211_sched_scan_request *sched_scan_req; |
40b0bd249 mac80211: oce: en... |
250 |
u32 scan_req_flags = 0, sched_scan_req_flags = 0; |
a344d6778 mac80211: allow d... |
251 252 253 |
scan_req = rcu_dereference(local->scan_req); sched_scan_req = rcu_dereference(local->sched_scan_req); |
40b0bd249 mac80211: oce: en... |
254 255 256 257 258 259 260 261 |
if (scan_req) scan_req_flags = scan_req->flags; if (sched_scan_req) sched_scan_req_flags = sched_scan_req->flags; /* ignore ProbeResp to foreign address or non-bcast (OCE) * unless scanning with randomised address |
a344d6778 mac80211: allow d... |
262 |
*/ |
40b0bd249 mac80211: oce: en... |
263 264 265 266 |
if (!ieee80211_scan_accept_presp(sdata1, scan_req_flags, mgmt->da) && !ieee80211_scan_accept_presp(sdata2, sched_scan_req_flags, mgmt->da)) |
d48b29685 mac80211: redesig... |
267 |
return; |
98c8fccfa mac80211: refacto... |
268 |
} |
0172bb750 cfg80211: use DS ... |
269 |
channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq); |
98c8fccfa mac80211: refacto... |
270 271 |
if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) |
d48b29685 mac80211: redesig... |
272 |
return; |
98c8fccfa mac80211: refacto... |
273 |
|
d48b29685 mac80211: redesig... |
274 |
bss = ieee80211_bss_info_update(local, rx_status, |
4abb52a46 mac80211: pass bs... |
275 |
mgmt, skb->len, |
d45c41722 mac82011: use fra... |
276 |
channel); |
d048e503a mac80211: Fix sca... |
277 |
if (bss) |
d48b29685 mac80211: redesig... |
278 |
ieee80211_rx_bss_put(local, bss); |
98c8fccfa mac80211: refacto... |
279 |
} |
2103dec14 mac80211: select ... |
280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 |
static void ieee80211_prepare_scan_chandef(struct cfg80211_chan_def *chandef, enum nl80211_bss_scan_width scan_width) { memset(chandef, 0, sizeof(*chandef)); switch (scan_width) { case NL80211_BSS_CHAN_WIDTH_5: chandef->width = NL80211_CHAN_WIDTH_5; break; case NL80211_BSS_CHAN_WIDTH_10: chandef->width = NL80211_CHAN_WIDTH_10; break; default: chandef->width = NL80211_CHAN_WIDTH_20_NOHT; break; } } |
4d36ec582 mac80211: split h... |
297 298 299 |
/* return false if no more work */ static bool ieee80211_prep_hw_scan(struct ieee80211_local *local) { |
6ea0a69ca mac80211: rcu-ify... |
300 |
struct cfg80211_scan_request *req; |
2103dec14 mac80211: select ... |
301 |
struct cfg80211_chan_def chandef; |
c56ef6725 mac80211: support... |
302 |
u8 bands_used = 0; |
4d36ec582 mac80211: split h... |
303 |
int i, ielen, n_chans; |
b9771d41a mac80211: support... |
304 |
u32 flags = 0; |
4d36ec582 mac80211: split h... |
305 |
|
6ea0a69ca mac80211: rcu-ify... |
306 307 |
req = rcu_dereference_protected(local->scan_req, lockdep_is_held(&local->mtx)); |
a754055a1 mac80211: correct... |
308 309 |
if (test_bit(SCAN_HW_CANCELLED, &local->scanning)) return false; |
30686bf7f mac80211: convert... |
310 |
if (ieee80211_hw_check(&local->hw, SINGLE_SCAN_ON_ALL_BANDS)) { |
4d36ec582 mac80211: split h... |
311 |
for (i = 0; i < req->n_channels; i++) { |
c56ef6725 mac80211: support... |
312 313 314 315 316 317 318 |
local->hw_scan_req->req.channels[i] = req->channels[i]; bands_used |= BIT(req->channels[i]->band); } n_chans = req->n_channels; } else { do { |
57fbcce37 cfg80211: remove ... |
319 |
if (local->hw_scan_band == NUM_NL80211_BANDS) |
c56ef6725 mac80211: support... |
320 321 322 323 324 325 326 327 328 |
return false; n_chans = 0; for (i = 0; i < req->n_channels; i++) { if (req->channels[i]->band != local->hw_scan_band) continue; local->hw_scan_req->req.channels[n_chans] = |
4d36ec582 mac80211: split h... |
329 330 |
req->channels[i]; n_chans++; |
c56ef6725 mac80211: support... |
331 |
bands_used |= BIT(req->channels[i]->band); |
4d36ec582 mac80211: split h... |
332 |
} |
4d36ec582 mac80211: split h... |
333 |
|
c56ef6725 mac80211: support... |
334 335 336 |
local->hw_scan_band++; } while (!n_chans); } |
4d36ec582 mac80211: split h... |
337 |
|
c56ef6725 mac80211: support... |
338 |
local->hw_scan_req->req.n_channels = n_chans; |
2103dec14 mac80211: select ... |
339 |
ieee80211_prepare_scan_chandef(&chandef, req->scan_width); |
4d36ec582 mac80211: split h... |
340 |
|
b9771d41a mac80211: support... |
341 342 |
if (req->flags & NL80211_SCAN_FLAG_MIN_PREQ_CONTENT) flags |= IEEE80211_PROBE_FLAG_MIN_CONTENT; |
c56ef6725 mac80211: support... |
343 344 |
ielen = ieee80211_build_preq_ies(local, (u8 *)local->hw_scan_req->req.ie, |
c604b9f21 mac80211: make ie... |
345 |
local->hw_scan_ies_bufsize, |
c56ef6725 mac80211: support... |
346 347 |
&local->hw_scan_req->ies, req->ie, req->ie_len, |
b9771d41a mac80211: support... |
348 349 |
bands_used, req->rates, &chandef, flags); |
c56ef6725 mac80211: support... |
350 351 |
local->hw_scan_req->req.ie_len = ielen; local->hw_scan_req->req.no_cck = req->no_cck; |
a344d6778 mac80211: allow d... |
352 353 354 |
ether_addr_copy(local->hw_scan_req->req.mac_addr, req->mac_addr); ether_addr_copy(local->hw_scan_req->req.mac_addr_mask, req->mac_addr_mask); |
e345f44f2 mac80211: Support... |
355 |
ether_addr_copy(local->hw_scan_req->req.bssid, req->bssid); |
4d36ec582 mac80211: split h... |
356 357 358 |
return true; } |
8bd2a2489 mac80211: determi... |
359 |
static void __ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted) |
0a51b27e9 mac80211: start m... |
360 361 |
{ struct ieee80211_local *local = hw_to_local(hw); |
e9da68dde mac80211: allow h... |
362 |
bool hw_scan = test_bit(SCAN_HW_SCANNING, &local->scanning); |
a2b70e833 mac80211: start_n... |
363 |
bool was_scanning = local->scanning; |
6ea0a69ca mac80211: rcu-ify... |
364 |
struct cfg80211_scan_request *scan_req; |
a344d6778 mac80211: allow d... |
365 |
struct ieee80211_sub_if_data *scan_sdata; |
4fa11ec72 mac80211: Requeue... |
366 |
struct ieee80211_sub_if_data *sdata; |
0a51b27e9 mac80211: start m... |
367 |
|
e229f844d mac80211: keep lo... |
368 |
lockdep_assert_held(&local->mtx); |
5bc75728f mac80211: fix sca... |
369 |
|
6d3560d4f mac80211: fix sca... |
370 371 372 373 374 375 376 377 |
/* * It's ok to abort a not-yet-running scan (that * we have one at all will be verified by checking * local->scan_req next), but not to complete it * successfully. */ if (WARN_ON(!local->scanning && !aborted)) aborted = true; |
5bc75728f mac80211: fix sca... |
378 |
|
e229f844d mac80211: keep lo... |
379 |
if (WARN_ON(!local->scan_req)) |
d07bfd8b6 mac80211: fix sca... |
380 |
return; |
de95a54b1 mac80211: pass al... |
381 |
|
c56ef6725 mac80211: support... |
382 |
if (hw_scan && !aborted && |
30686bf7f mac80211: convert... |
383 |
!ieee80211_hw_check(&local->hw, SINGLE_SCAN_ON_ALL_BANDS) && |
c56ef6725 mac80211: support... |
384 |
ieee80211_prep_hw_scan(local)) { |
e2fd5dbc1 mac80211: make sc... |
385 386 387 388 389 390 |
int rc; rc = drv_hw_scan(local, rcu_dereference_protected(local->scan_sdata, lockdep_is_held(&local->mtx)), local->hw_scan_req); |
6eb11a9a3 mac80211: do not ... |
391 |
if (rc == 0) |
d07bfd8b6 mac80211: fix sca... |
392 |
return; |
7947d3e07 mac80211: Add sup... |
393 |
|
7d10f6b17 mac80211: report ... |
394 395 |
/* HW scan failed and is going to be reported as aborted, * so clear old scan info. |
7947d3e07 mac80211: Add sup... |
396 397 |
*/ memset(&local->scan_info, 0, sizeof(local->scan_info)); |
7d10f6b17 mac80211: report ... |
398 |
aborted = true; |
4d36ec582 mac80211: split h... |
399 400 401 402 |
} kfree(local->hw_scan_req); local->hw_scan_req = NULL; |
f3b85252f mac80211: fix sca... |
403 |
|
6ea0a69ca mac80211: rcu-ify... |
404 405 |
scan_req = rcu_dereference_protected(local->scan_req, lockdep_is_held(&local->mtx)); |
1d76250bd nl80211: support ... |
406 |
if (scan_req != local->int_scan_req) { |
7947d3e07 mac80211: Add sup... |
407 408 |
local->scan_info.aborted = aborted; cfg80211_scan_done(scan_req, &local->scan_info); |
1d76250bd nl80211: support ... |
409 |
} |
6ea0a69ca mac80211: rcu-ify... |
410 |
RCU_INIT_POINTER(local->scan_req, NULL); |
a344d6778 mac80211: allow d... |
411 412 413 |
scan_sdata = rcu_dereference_protected(local->scan_sdata, lockdep_is_held(&local->mtx)); |
0c2bef462 mac80211: use RCU... |
414 |
RCU_INIT_POINTER(local->scan_sdata, NULL); |
2a5193119 cfg80211/nl80211:... |
415 |
|
fbe9c429f mac80211: Replace... |
416 |
local->scanning = 0; |
7ca15a0ae mac80211: allow s... |
417 |
local->scan_chandef.chan = NULL; |
f3b85252f mac80211: fix sca... |
418 |
|
07ef03ee8 mac80211: simplif... |
419 420 |
/* Set power back to normal operating levels. */ ieee80211_hw_config(local, 0); |
a0daa0e75 Revert "mac80211:... |
421 |
|
8bd2a2489 mac80211: determi... |
422 |
if (!hw_scan) { |
e229f844d mac80211: keep lo... |
423 |
ieee80211_configure_filter(local); |
a344d6778 mac80211: allow d... |
424 |
drv_sw_scan_complete(local, scan_sdata); |
aacde9ee4 mac80211: synchro... |
425 |
ieee80211_offchannel_return(local); |
e229f844d mac80211: keep lo... |
426 |
} |
0a51b27e9 mac80211: start m... |
427 |
|
5cff20e6c mac80211: tell dr... |
428 |
ieee80211_recalc_idle(local); |
e229f844d mac80211: keep lo... |
429 |
|
0a51b27e9 mac80211: start m... |
430 |
ieee80211_mlme_notify_scan_completed(local); |
469002983 mac80211: split I... |
431 |
ieee80211_ibss_notify_scan_completed(local); |
4fa11ec72 mac80211: Requeue... |
432 433 434 435 436 437 438 439 440 |
/* Requeue all the work that might have been ignored while * the scan was in progress; if there was none this will * just be a no-op for the particular interface. */ list_for_each_entry_rcu(sdata, &local->interfaces, list) { if (ieee80211_sdata_running(sdata)) ieee80211_queue_work(&sdata->local->hw, &sdata->work); } |
a2b70e833 mac80211: start_n... |
441 442 |
if (was_scanning) ieee80211_start_next_roc(local); |
0a51b27e9 mac80211: start m... |
443 |
} |
8789d459b mac80211: allow s... |
444 |
|
7947d3e07 mac80211: Add sup... |
445 446 |
void ieee80211_scan_completed(struct ieee80211_hw *hw, struct cfg80211_scan_info *info) |
8789d459b mac80211: allow s... |
447 448 |
{ struct ieee80211_local *local = hw_to_local(hw); |
58bd7f115 mac80211: fix sca... |
449 |
trace_api_scan_completed(local, info->aborted); |
8789d459b mac80211: allow s... |
450 451 |
set_bit(SCAN_COMPLETED, &local->scanning); |
7947d3e07 mac80211: Add sup... |
452 |
if (info->aborted) |
8789d459b mac80211: allow s... |
453 |
set_bit(SCAN_ABORTED, &local->scanning); |
7947d3e07 mac80211: Add sup... |
454 455 |
memcpy(&local->scan_info, info, sizeof(*info)); |
8789d459b mac80211: allow s... |
456 457 |
ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0); } |
0a51b27e9 mac80211: start m... |
458 |
EXPORT_SYMBOL(ieee80211_scan_completed); |
a344d6778 mac80211: allow d... |
459 460 |
static int ieee80211_start_sw_scan(struct ieee80211_local *local, struct ieee80211_sub_if_data *sdata) |
f3b85252f mac80211: fix sca... |
461 |
{ |
fe57d9f5c mac80211: track w... |
462 463 464 |
/* Software scan is not supported in multi-channel cases */ if (local->use_chanctx) return -EOPNOTSUPP; |
f3b85252f mac80211: fix sca... |
465 466 467 468 469 470 471 472 473 474 475 476 477 |
/* * Hardware/driver doesn't support hw_scan, so use software * scanning instead. First send a nullfunc frame with power save * bit on so that AP will buffer the frames for us while we are not * listening, then send probe requests to each channel and wait for * the responses. After all channels are scanned, tune back to the * original channel and send a nullfunc frame with power save bit * off to trigger the AP to send us all the buffered frames. * * Note that while local->sw_scanning is true everything else but * nullfunc frames and probe requests will be dropped in * ieee80211_tx_h_check_assoc(). */ |
a344d6778 mac80211: allow d... |
478 |
drv_sw_scan_start(local, sdata, local->scan_addr); |
f3b85252f mac80211: fix sca... |
479 |
|
de312db34 mac80211: fix ope... |
480 |
local->leave_oper_channel_time = jiffies; |
977923b00 mac80211: rename ... |
481 |
local->next_scan_state = SCAN_DECISION; |
f3b85252f mac80211: fix sca... |
482 |
local->scan_channel_idx = 0; |
aacde9ee4 mac80211: synchro... |
483 |
ieee80211_offchannel_stop_vifs(local); |
a80f7c0b0 mac80211: introdu... |
484 |
|
9c35d7d23 mac80211: Add flu... |
485 |
/* ensure nullfunc is transmitted before leaving operating channel */ |
3b24f4c65 mac80211: let flu... |
486 |
ieee80211_flush_queues(local, NULL, false); |
9c35d7d23 mac80211: Add flu... |
487 |
|
3ac64beec mac80211: allow c... |
488 |
ieee80211_configure_filter(local); |
f3b85252f mac80211: fix sca... |
489 |
|
59bdf3b0f mac80211: Ensure ... |
490 491 |
/* We need to set power level at maximum rate for scanning. */ ieee80211_hw_config(local, 0); |
42935ecaf mac80211: redefin... |
492 |
ieee80211_queue_delayed_work(&local->hw, |
07ef03ee8 mac80211: simplif... |
493 |
&local->scan_work, 0); |
f3b85252f mac80211: fix sca... |
494 495 496 |
return 0; } |
dc0c18ed2 mac80211: fix sca... |
497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 |
static bool __ieee80211_can_leave_ch(struct ieee80211_sub_if_data *sdata) { struct ieee80211_local *local = sdata->local; struct ieee80211_sub_if_data *sdata_iter; if (!ieee80211_is_radar_required(local)) return true; if (!regulatory_pre_cac_allowed(local->hw.wiphy)) return false; mutex_lock(&local->iflist_mtx); list_for_each_entry(sdata_iter, &local->interfaces, list) { if (sdata_iter->wdev.cac_started) { mutex_unlock(&local->iflist_mtx); return false; } } mutex_unlock(&local->iflist_mtx); return true; } |
133d40f9a mac80211: do not ... |
519 520 521 |
static bool ieee80211_can_scan(struct ieee80211_local *local, struct ieee80211_sub_if_data *sdata) { |
dc0c18ed2 mac80211: fix sca... |
522 |
if (!__ieee80211_can_leave_ch(sdata)) |
164eb02d0 mac80211: add rad... |
523 |
return false; |
2eb278e08 mac80211: unify S... |
524 |
if (!list_empty(&local->roc_list)) |
133d40f9a mac80211: do not ... |
525 526 527 |
return false; if (sdata->vif.type == NL80211_IFTYPE_STATION && |
392b9ffb0 mac80211: change ... |
528 |
sdata->u.mgd.flags & IEEE80211_STA_CONNECTION_POLL) |
133d40f9a mac80211: do not ... |
529 530 531 532 533 534 535 536 537 538 539 |
return false; return true; } void ieee80211_run_deferred_scan(struct ieee80211_local *local) { lockdep_assert_held(&local->mtx); if (!local->scan_req || local->scanning) return; |
e2fd5dbc1 mac80211: make sc... |
540 541 542 543 |
if (!ieee80211_can_scan(local, rcu_dereference_protected( local->scan_sdata, lockdep_is_held(&local->mtx)))) |
133d40f9a mac80211: do not ... |
544 545 546 547 548 |
return; ieee80211_queue_delayed_work(&local->hw, &local->scan_work, round_jiffies_relative(0)); } |
f3b85252f mac80211: fix sca... |
549 |
|
45ad68348 mac80211: split i... |
550 551 552 553 554 555 556 557 |
static void ieee80211_send_scan_probe_req(struct ieee80211_sub_if_data *sdata, const u8 *src, const u8 *dst, const u8 *ssid, size_t ssid_len, const u8 *ie, size_t ie_len, u32 ratemask, u32 flags, u32 tx_flags, struct ieee80211_channel *channel) { struct sk_buff *skb; |
b9771d41a mac80211: support... |
558 |
u32 txdata_flags = 0; |
45ad68348 mac80211: split i... |
559 560 561 562 |
skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel, ssid, ssid_len, ie, ie_len, flags); |
b9771d41a mac80211: support... |
563 |
|
45ad68348 mac80211: split i... |
564 |
if (skb) { |
b9771d41a mac80211: support... |
565 566 567 568 569 570 571 572 |
if (flags & IEEE80211_PROBE_FLAG_RANDOM_SN) { struct ieee80211_hdr *hdr = (void *)skb->data; u16 sn = get_random_u32(); txdata_flags |= IEEE80211_TX_NO_SEQNO; hdr->seq_ctrl = cpu_to_le16(IEEE80211_SN_TO_SEQ(sn)); } |
45ad68348 mac80211: split i... |
573 |
IEEE80211_SKB_CB(skb)->flags |= tx_flags; |
b9771d41a mac80211: support... |
574 575 |
ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band, txdata_flags); |
45ad68348 mac80211: split i... |
576 577 |
} } |
8a690674e mac80211: Support... |
578 579 580 581 |
static void ieee80211_scan_state_send_probe(struct ieee80211_local *local, unsigned long *next_delay) { int i; |
e2fd5dbc1 mac80211: make sc... |
582 |
struct ieee80211_sub_if_data *sdata; |
6ea0a69ca mac80211: rcu-ify... |
583 |
struct cfg80211_scan_request *scan_req; |
57fbcce37 cfg80211: remove ... |
584 |
enum nl80211_band band = local->hw.conf.chandef.chan->band; |
b9771d41a mac80211: support... |
585 |
u32 flags = 0, tx_flags; |
6c17b77b6 mac80211: Fix tx ... |
586 |
|
6ea0a69ca mac80211: rcu-ify... |
587 588 |
scan_req = rcu_dereference_protected(local->scan_req, lockdep_is_held(&local->mtx)); |
6c17b77b6 mac80211: Fix tx ... |
589 |
tx_flags = IEEE80211_TX_INTFL_OFFCHAN_TX_OK; |
6ea0a69ca mac80211: rcu-ify... |
590 |
if (scan_req->no_cck) |
6c17b77b6 mac80211: Fix tx ... |
591 |
tx_flags |= IEEE80211_TX_CTL_NO_CCK_RATE; |
b9771d41a mac80211: support... |
592 593 594 595 |
if (scan_req->flags & NL80211_SCAN_FLAG_MIN_PREQ_CONTENT) flags |= IEEE80211_PROBE_FLAG_MIN_CONTENT; if (scan_req->flags & NL80211_SCAN_FLAG_RANDOM_SN) flags |= IEEE80211_PROBE_FLAG_RANDOM_SN; |
8a690674e mac80211: Support... |
596 |
|
e2fd5dbc1 mac80211: make sc... |
597 |
sdata = rcu_dereference_protected(local->scan_sdata, |
316b6b5df net/mac80211/scan... |
598 |
lockdep_is_held(&local->mtx)); |
e2fd5dbc1 mac80211: make sc... |
599 |
|
6ea0a69ca mac80211: rcu-ify... |
600 |
for (i = 0; i < scan_req->n_ssids; i++) |
45ad68348 mac80211: split i... |
601 |
ieee80211_send_scan_probe_req( |
e345f44f2 mac80211: Support... |
602 |
sdata, local->scan_addr, scan_req->bssid, |
6ea0a69ca mac80211: rcu-ify... |
603 604 |
scan_req->ssids[i].ssid, scan_req->ssids[i].ssid_len, scan_req->ie, scan_req->ie_len, |
b9771d41a mac80211: support... |
605 |
scan_req->rates[band], flags, |
45ad68348 mac80211: split i... |
606 |
tx_flags, local->hw.conf.chandef.chan); |
8a690674e mac80211: Support... |
607 608 609 610 611 612 613 614 |
/* * After sending probe requests, wait for probe responses * on the channel. */ *next_delay = IEEE80211_CHANNEL_TIME; local->next_scan_state = SCAN_DECISION; } |
f3b85252f mac80211: fix sca... |
615 616 617 618 |
static int __ieee80211_start_scan(struct ieee80211_sub_if_data *sdata, struct cfg80211_scan_request *req) { struct ieee80211_local *local = sdata->local; |
e9da68dde mac80211: allow h... |
619 |
bool hw_scan = local->ops->hw_scan; |
f3b85252f mac80211: fix sca... |
620 |
int rc; |
e229f844d mac80211: keep lo... |
621 |
lockdep_assert_held(&local->mtx); |
dc0c18ed2 mac80211: fix sca... |
622 623 624 625 |
if (local->scan_req) return -EBUSY; if (!__ieee80211_can_leave_ch(sdata)) |
f3b85252f mac80211: fix sca... |
626 |
return -EBUSY; |
133d40f9a mac80211: do not ... |
627 |
if (!ieee80211_can_scan(local, sdata)) { |
6e7e6213e Merge branch 'mas... |
628 |
/* wait for the work to finish/time out */ |
6ea0a69ca mac80211: rcu-ify... |
629 |
rcu_assign_pointer(local->scan_req, req); |
e2fd5dbc1 mac80211: make sc... |
630 |
rcu_assign_pointer(local->scan_sdata, sdata); |
c0ce77b83 mac80211: fix def... |
631 632 |
return 0; } |
e9da68dde mac80211: allow h... |
633 634 |
again: if (hw_scan) { |
f3b85252f mac80211: fix sca... |
635 |
u8 *ies; |
f3b85252f mac80211: fix sca... |
636 |
|
e4dcbb375 mac80211: fix IE ... |
637 |
local->hw_scan_ies_bufsize = local->scan_ies_len + req->ie_len; |
c56ef6725 mac80211: support... |
638 |
|
30686bf7f mac80211: convert... |
639 |
if (ieee80211_hw_check(&local->hw, SINGLE_SCAN_ON_ALL_BANDS)) { |
c56ef6725 mac80211: support... |
640 641 642 643 644 645 646 647 648 649 650 651 |
int i, n_bands = 0; u8 bands_counted = 0; for (i = 0; i < req->n_channels; i++) { if (bands_counted & BIT(req->channels[i]->band)) continue; bands_counted |= BIT(req->channels[i]->band); n_bands++; } local->hw_scan_ies_bufsize *= n_bands; } |
4d36ec582 mac80211: split h... |
652 653 654 |
local->hw_scan_req = kmalloc( sizeof(*local->hw_scan_req) + req->n_channels * sizeof(req->channels[0]) + |
c604b9f21 mac80211: make ie... |
655 |
local->hw_scan_ies_bufsize, GFP_KERNEL); |
4d36ec582 mac80211: split h... |
656 |
if (!local->hw_scan_req) |
f3b85252f mac80211: fix sca... |
657 |
return -ENOMEM; |
c56ef6725 mac80211: support... |
658 659 |
local->hw_scan_req->req.ssids = req->ssids; local->hw_scan_req->req.n_ssids = req->n_ssids; |
4d36ec582 mac80211: split h... |
660 661 662 |
ies = (u8 *)local->hw_scan_req + sizeof(*local->hw_scan_req) + req->n_channels * sizeof(req->channels[0]); |
c56ef6725 mac80211: support... |
663 664 |
local->hw_scan_req->req.ie = ies; local->hw_scan_req->req.flags = req->flags; |
e345f44f2 mac80211: Support... |
665 |
eth_broadcast_addr(local->hw_scan_req->req.bssid); |
7947d3e07 mac80211: Add sup... |
666 667 668 |
local->hw_scan_req->req.duration = req->duration; local->hw_scan_req->req.duration_mandatory = req->duration_mandatory; |
4d36ec582 mac80211: split h... |
669 670 |
local->hw_scan_band = 0; |
6e7e6213e Merge branch 'mas... |
671 672 673 674 675 676 677 678 |
/* * After allocating local->hw_scan_req, we must * go through until ieee80211_prep_hw_scan(), so * anything that might be changed here and leave * this function early must not go after this * allocation. */ |
f3b85252f mac80211: fix sca... |
679 |
} |
6ea0a69ca mac80211: rcu-ify... |
680 |
rcu_assign_pointer(local->scan_req, req); |
e2fd5dbc1 mac80211: make sc... |
681 |
rcu_assign_pointer(local->scan_sdata, sdata); |
f3b85252f mac80211: fix sca... |
682 |
|
a344d6778 mac80211: allow d... |
683 684 685 686 687 688 |
if (req->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) get_random_mask_addr(local->scan_addr, req->mac_addr, req->mac_addr_mask); else memcpy(local->scan_addr, sdata->vif.addr, ETH_ALEN); |
e9da68dde mac80211: allow h... |
689 |
if (hw_scan) { |
fbe9c429f mac80211: Replace... |
690 |
__set_bit(SCAN_HW_SCANNING, &local->scanning); |
8a690674e mac80211: Support... |
691 |
} else if ((req->n_channels == 1) && |
675a0b049 mac80211: Use a c... |
692 |
(req->channels[0] == local->_oper_chandef.chan)) { |
9b8648704 mac80211: check o... |
693 694 695 |
/* * If we are scanning only on the operating channel * then we do not need to stop normal activities |
8a690674e mac80211: Support... |
696 697 698 699 700 701 702 703 704 |
*/ unsigned long next_delay; __set_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning); ieee80211_recalc_idle(local); /* Notify driver scan is starting, keep order of operations * same as normal software scan, in case that matters. */ |
a344d6778 mac80211: allow d... |
705 |
drv_sw_scan_start(local, sdata, local->scan_addr); |
8a690674e mac80211: Support... |
706 707 708 709 710 |
ieee80211_configure_filter(local); /* accept probe-responses */ /* We need to ensure power level is at max for scanning. */ ieee80211_hw_config(local, 0); |
4e39ccac0 mac80211: do not ... |
711 712 |
if ((req->channels[0]->flags & (IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_RADAR)) || |
6ea0a69ca mac80211: rcu-ify... |
713 |
!req->n_ssids) { |
8a690674e mac80211: Support... |
714 715 716 717 718 719 720 721 722 723 724 725 |
next_delay = IEEE80211_PASSIVE_CHANNEL_TIME; } else { ieee80211_scan_state_send_probe(local, &next_delay); next_delay = IEEE80211_CHANNEL_TIME; } /* Now, just wait a bit and we are all done! */ ieee80211_queue_delayed_work(&local->hw, &local->scan_work, next_delay); return 0; } else { /* Do normal software scan */ |
fbe9c429f mac80211: Replace... |
726 |
__set_bit(SCAN_SW_SCANNING, &local->scanning); |
8a690674e mac80211: Support... |
727 |
} |
6e7e6213e Merge branch 'mas... |
728 |
|
5cff20e6c mac80211: tell dr... |
729 |
ieee80211_recalc_idle(local); |
f3b85252f mac80211: fix sca... |
730 |
|
e9da68dde mac80211: allow h... |
731 |
if (hw_scan) { |
4d36ec582 mac80211: split h... |
732 |
WARN_ON(!ieee80211_prep_hw_scan(local)); |
a060bbfe4 mac80211: give vi... |
733 |
rc = drv_hw_scan(local, sdata, local->hw_scan_req); |
a344d6778 mac80211: allow d... |
734 735 736 |
} else { rc = ieee80211_start_sw_scan(local, sdata); } |
f3b85252f mac80211: fix sca... |
737 |
|
f3b85252f mac80211: fix sca... |
738 |
if (rc) { |
4d36ec582 mac80211: split h... |
739 740 |
kfree(local->hw_scan_req); local->hw_scan_req = NULL; |
fbe9c429f mac80211: Replace... |
741 |
local->scanning = 0; |
f3b85252f mac80211: fix sca... |
742 |
|
5cff20e6c mac80211: tell dr... |
743 |
ieee80211_recalc_idle(local); |
f3b85252f mac80211: fix sca... |
744 |
local->scan_req = NULL; |
0c2bef462 mac80211: use RCU... |
745 |
RCU_INIT_POINTER(local->scan_sdata, NULL); |
f3b85252f mac80211: fix sca... |
746 |
} |
e9da68dde mac80211: allow h... |
747 748 749 750 751 752 753 754 755 756 757 |
if (hw_scan && rc == 1) { /* * we can't fall back to software for P2P-GO * as it must update NoA etc. */ if (ieee80211_vif_type_p2p(&sdata->vif) == NL80211_IFTYPE_P2P_GO) return -EOPNOTSUPP; hw_scan = false; goto again; } |
f3b85252f mac80211: fix sca... |
758 759 |
return rc; } |
df13cce53 mac80211: Improve... |
760 761 762 763 764 765 766 |
static unsigned long ieee80211_scan_get_channel_time(struct ieee80211_channel *chan) { /* * TODO: channel switching also consumes quite some time, * add that delay as well to get a better estimation */ |
4e39ccac0 mac80211: do not ... |
767 |
if (chan->flags & (IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_RADAR)) |
df13cce53 mac80211: Improve... |
768 769 770 |
return IEEE80211_PASSIVE_CHANNEL_TIME; return IEEE80211_PROBE_DELAY + IEEE80211_CHANNEL_TIME; } |
e229f844d mac80211: keep lo... |
771 772 |
static void ieee80211_scan_state_decision(struct ieee80211_local *local, unsigned long *next_delay) |
7d3be3cc4 mac80211: refacto... |
773 |
{ |
142b9f507 mac80211: impleme... |
774 |
bool associated = false; |
df13cce53 mac80211: Improve... |
775 776 |
bool tx_empty = true; bool bad_latency; |
142b9f507 mac80211: impleme... |
777 |
struct ieee80211_sub_if_data *sdata; |
df13cce53 mac80211: Improve... |
778 |
struct ieee80211_channel *next_chan; |
cd2bb512c mac80211: add sup... |
779 |
enum mac80211_scan_state next_scan_state; |
6ea0a69ca mac80211: rcu-ify... |
780 |
struct cfg80211_scan_request *scan_req; |
142b9f507 mac80211: impleme... |
781 |
|
df13cce53 mac80211: Improve... |
782 783 784 785 786 |
/* * check if at least one STA interface is associated, * check if at least one STA interface has pending tx frames * and grab the lowest used beacon interval */ |
142b9f507 mac80211: impleme... |
787 788 |
mutex_lock(&local->iflist_mtx); list_for_each_entry(sdata, &local->interfaces, list) { |
9607e6b66 mac80211: add iee... |
789 |
if (!ieee80211_sdata_running(sdata)) |
142b9f507 mac80211: impleme... |
790 791 792 793 794 |
continue; if (sdata->vif.type == NL80211_IFTYPE_STATION) { if (sdata->u.mgd.associated) { associated = true; |
df13cce53 mac80211: Improve... |
795 |
|
df13cce53 mac80211: Improve... |
796 797 798 799 |
if (!qdisc_all_tx_empty(sdata->dev)) { tx_empty = false; break; } |
142b9f507 mac80211: impleme... |
800 801 802 803 |
} } } mutex_unlock(&local->iflist_mtx); |
6ea0a69ca mac80211: rcu-ify... |
804 805 806 807 |
scan_req = rcu_dereference_protected(local->scan_req, lockdep_is_held(&local->mtx)); next_chan = scan_req->channels[local->scan_channel_idx]; |
b23b025fe mac80211: Optimiz... |
808 |
|
a80f7c0b0 mac80211: introdu... |
809 |
/* |
07ef03ee8 mac80211: simplif... |
810 811 812 813 |
* we're currently scanning a different channel, let's * see if we can scan another channel without interfering * with the current traffic situation. * |
3f892b61a mac80211: improve... |
814 |
* Keep good latency, do not stay off-channel more than 125 ms. |
a80f7c0b0 mac80211: introdu... |
815 |
*/ |
a80f7c0b0 mac80211: introdu... |
816 |
|
07ef03ee8 mac80211: simplif... |
817 |
bad_latency = time_after(jiffies + |
3f892b61a mac80211: improve... |
818 819 |
ieee80211_scan_get_channel_time(next_chan), local->leave_oper_channel_time + HZ / 8); |
142b9f507 mac80211: impleme... |
820 |
|
cd2bb512c mac80211: add sup... |
821 |
if (associated && !tx_empty) { |
6ea0a69ca mac80211: rcu-ify... |
822 |
if (scan_req->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) |
cd2bb512c mac80211: add sup... |
823 824 825 |
next_scan_state = SCAN_ABORT; else next_scan_state = SCAN_SUSPEND; |
3f892b61a mac80211: improve... |
826 |
} else if (associated && bad_latency) { |
cd2bb512c mac80211: add sup... |
827 828 829 830 831 832 |
next_scan_state = SCAN_SUSPEND; } else { next_scan_state = SCAN_SET_CHANNEL; } local->next_scan_state = next_scan_state; |
142b9f507 mac80211: impleme... |
833 |
|
07ef03ee8 mac80211: simplif... |
834 |
*next_delay = 0; |
142b9f507 mac80211: impleme... |
835 |
} |
2fb3f028a mac80211: introdu... |
836 837 838 839 840 |
static void ieee80211_scan_state_set_channel(struct ieee80211_local *local, unsigned long *next_delay) { int skip; struct ieee80211_channel *chan; |
7ca15a0ae mac80211: allow s... |
841 |
enum nl80211_bss_scan_width oper_scan_width; |
6ea0a69ca mac80211: rcu-ify... |
842 843 844 845 |
struct cfg80211_scan_request *scan_req; scan_req = rcu_dereference_protected(local->scan_req, lockdep_is_held(&local->mtx)); |
2fb3f028a mac80211: introdu... |
846 |
|
7d3be3cc4 mac80211: refacto... |
847 |
skip = 0; |
6ea0a69ca mac80211: rcu-ify... |
848 |
chan = scan_req->channels[local->scan_channel_idx]; |
7d3be3cc4 mac80211: refacto... |
849 |
|
7ca15a0ae mac80211: allow s... |
850 851 852 |
local->scan_chandef.chan = chan; local->scan_chandef.center_freq1 = chan->center_freq; local->scan_chandef.center_freq2 = 0; |
6ea0a69ca mac80211: rcu-ify... |
853 |
switch (scan_req->scan_width) { |
7ca15a0ae mac80211: allow s... |
854 855 856 857 858 859 860 861 862 863 864 865 866 |
case NL80211_BSS_CHAN_WIDTH_5: local->scan_chandef.width = NL80211_CHAN_WIDTH_5; break; case NL80211_BSS_CHAN_WIDTH_10: local->scan_chandef.width = NL80211_CHAN_WIDTH_10; break; case NL80211_BSS_CHAN_WIDTH_20: /* If scanning on oper channel, use whatever channel-type * is currently in use. */ oper_scan_width = cfg80211_chandef_to_scan_width( &local->_oper_chandef); if (chan == local->_oper_chandef.chan && |
6ea0a69ca mac80211: rcu-ify... |
867 |
oper_scan_width == scan_req->scan_width) |
7ca15a0ae mac80211: allow s... |
868 869 870 871 872 |
local->scan_chandef = local->_oper_chandef; else local->scan_chandef.width = NL80211_CHAN_WIDTH_20_NOHT; break; } |
b23b025fe mac80211: Optimiz... |
873 |
|
07ef03ee8 mac80211: simplif... |
874 875 |
if (ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL)) skip = 1; |
7d3be3cc4 mac80211: refacto... |
876 |
|
7d3be3cc4 mac80211: refacto... |
877 878 |
/* advance state machine to next channel/band */ local->scan_channel_idx++; |
0ee9c13c7 mac80211: fix an ... |
879 880 881 |
if (skip) { /* if we skip this channel return to the decision state */ local->next_scan_state = SCAN_DECISION; |
2fb3f028a mac80211: introdu... |
882 |
return; |
0ee9c13c7 mac80211: fix an ... |
883 |
} |
7d3be3cc4 mac80211: refacto... |
884 885 886 887 888 889 890 891 892 893 894 |
/* * Probe delay is used to update the NAV, cf. 11.1.3.2.2 * (which unfortunately doesn't say _why_ step a) is done, * but it waits for the probe delay or until a frame is * received - and the received frame would update the NAV). * For now, we do not support waiting until a frame is * received. * * In any case, it is not necessary for a passive scan. */ |
4e39ccac0 mac80211: do not ... |
895 896 |
if ((chan->flags & (IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_RADAR)) || !scan_req->n_ssids) { |
7d3be3cc4 mac80211: refacto... |
897 |
*next_delay = IEEE80211_PASSIVE_CHANNEL_TIME; |
977923b00 mac80211: rename ... |
898 |
local->next_scan_state = SCAN_DECISION; |
2fb3f028a mac80211: introdu... |
899 |
return; |
7d3be3cc4 mac80211: refacto... |
900 |
} |
2fb3f028a mac80211: introdu... |
901 |
/* active scan, send probes */ |
7d3be3cc4 mac80211: refacto... |
902 |
*next_delay = IEEE80211_PROBE_DELAY; |
977923b00 mac80211: rename ... |
903 |
local->next_scan_state = SCAN_SEND_PROBE; |
7d3be3cc4 mac80211: refacto... |
904 |
} |
07ef03ee8 mac80211: simplif... |
905 906 907 908 |
static void ieee80211_scan_state_suspend(struct ieee80211_local *local, unsigned long *next_delay) { /* switch back to the operating channel */ |
7ca15a0ae mac80211: allow s... |
909 |
local->scan_chandef.chan = NULL; |
07ef03ee8 mac80211: simplif... |
910 |
ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); |
aacde9ee4 mac80211: synchro... |
911 912 |
/* disable PS */ ieee80211_offchannel_return(local); |
07ef03ee8 mac80211: simplif... |
913 914 915 916 917 918 919 920 921 |
*next_delay = HZ / 5; /* afterwards, resume scan & go to next channel */ local->next_scan_state = SCAN_RESUME; } static void ieee80211_scan_state_resume(struct ieee80211_local *local, unsigned long *next_delay) { |
aacde9ee4 mac80211: synchro... |
922 |
ieee80211_offchannel_stop_vifs(local); |
07ef03ee8 mac80211: simplif... |
923 924 |
if (local->ops->flush) { |
3b24f4c65 mac80211: let flu... |
925 |
ieee80211_flush_queues(local, NULL, false); |
07ef03ee8 mac80211: simplif... |
926 927 928 929 930 931 932 933 |
*next_delay = 0; } else *next_delay = HZ / 10; /* remember when we left the operating channel */ local->leave_oper_channel_time = jiffies; /* advance to the next channel to be scanned */ |
de2ee84db mac80211: fix sca... |
934 |
local->next_scan_state = SCAN_SET_CHANNEL; |
07ef03ee8 mac80211: simplif... |
935 |
} |
c2b13452b mac80211: clean u... |
936 |
void ieee80211_scan_work(struct work_struct *work) |
0a51b27e9 mac80211: start m... |
937 938 939 |
{ struct ieee80211_local *local = container_of(work, struct ieee80211_local, scan_work.work); |
d07bfd8b6 mac80211: fix sca... |
940 |
struct ieee80211_sub_if_data *sdata; |
6ea0a69ca mac80211: rcu-ify... |
941 |
struct cfg80211_scan_request *scan_req; |
0a51b27e9 mac80211: start m... |
942 |
unsigned long next_delay = 0; |
8bd2a2489 mac80211: determi... |
943 |
bool aborted; |
0a51b27e9 mac80211: start m... |
944 |
|
259b62e35 mac80211: reduce ... |
945 |
mutex_lock(&local->mtx); |
8789d459b mac80211: allow s... |
946 |
|
332ff7fe3 mac80211: complet... |
947 948 949 950 |
if (!ieee80211_can_run_worker(local)) { aborted = true; goto out_complete; } |
e2fd5dbc1 mac80211: make sc... |
951 952 |
sdata = rcu_dereference_protected(local->scan_sdata, lockdep_is_held(&local->mtx)); |
6ea0a69ca mac80211: rcu-ify... |
953 954 |
scan_req = rcu_dereference_protected(local->scan_req, lockdep_is_held(&local->mtx)); |
d07bfd8b6 mac80211: fix sca... |
955 |
|
8a690674e mac80211: Support... |
956 957 958 959 960 |
/* When scanning on-channel, the first-callback means completed. */ if (test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning)) { aborted = test_and_clear_bit(SCAN_ABORTED, &local->scanning); goto out_complete; } |
259b62e35 mac80211: reduce ... |
961 |
if (test_and_clear_bit(SCAN_COMPLETED, &local->scanning)) { |
8789d459b mac80211: allow s... |
962 |
aborted = test_and_clear_bit(SCAN_ABORTED, &local->scanning); |
259b62e35 mac80211: reduce ... |
963 |
goto out_complete; |
8789d459b mac80211: allow s... |
964 |
} |
6ea0a69ca mac80211: rcu-ify... |
965 |
if (!sdata || !scan_req) |
259b62e35 mac80211: reduce ... |
966 |
goto out; |
f3b85252f mac80211: fix sca... |
967 |
|
ff5db4392 mac80211: remove ... |
968 |
if (!local->scanning) { |
f3b85252f mac80211: fix sca... |
969 |
int rc; |
6ea0a69ca mac80211: rcu-ify... |
970 |
RCU_INIT_POINTER(local->scan_req, NULL); |
0c2bef462 mac80211: use RCU... |
971 |
RCU_INIT_POINTER(local->scan_sdata, NULL); |
f3b85252f mac80211: fix sca... |
972 |
|
6ea0a69ca mac80211: rcu-ify... |
973 |
rc = __ieee80211_start_scan(sdata, scan_req); |
259b62e35 mac80211: reduce ... |
974 |
if (rc) { |
3aed49ef1 mac80211: compete... |
975 |
/* need to complete scan in cfg80211 */ |
6ea0a69ca mac80211: rcu-ify... |
976 |
rcu_assign_pointer(local->scan_req, scan_req); |
259b62e35 mac80211: reduce ... |
977 978 979 980 |
aborted = true; goto out_complete; } else goto out; |
f3b85252f mac80211: fix sca... |
981 |
} |
5bc75728f mac80211: fix sca... |
982 |
/* |
f502d09b7 mac80211: advance... |
983 984 985 986 |
* as long as no delay is required advance immediately * without scheduling a new work */ do { |
c29acf201 mac80211: abort s... |
987 988 989 990 |
if (!ieee80211_sdata_running(sdata)) { aborted = true; goto out_complete; } |
977923b00 mac80211: rename ... |
991 |
switch (local->next_scan_state) { |
2fb3f028a mac80211: introdu... |
992 |
case SCAN_DECISION: |
e229f844d mac80211: keep lo... |
993 |
/* if no more bands/channels left, complete scan */ |
6ea0a69ca mac80211: rcu-ify... |
994 |
if (local->scan_channel_idx >= scan_req->n_channels) { |
e229f844d mac80211: keep lo... |
995 996 997 998 |
aborted = false; goto out_complete; } ieee80211_scan_state_decision(local, &next_delay); |
f502d09b7 mac80211: advance... |
999 |
break; |
2fb3f028a mac80211: introdu... |
1000 1001 1002 |
case SCAN_SET_CHANNEL: ieee80211_scan_state_set_channel(local, &next_delay); break; |
f502d09b7 mac80211: advance... |
1003 1004 1005 |
case SCAN_SEND_PROBE: ieee80211_scan_state_send_probe(local, &next_delay); break; |
07ef03ee8 mac80211: simplif... |
1006 1007 |
case SCAN_SUSPEND: ieee80211_scan_state_suspend(local, &next_delay); |
142b9f507 mac80211: impleme... |
1008 |
break; |
07ef03ee8 mac80211: simplif... |
1009 1010 |
case SCAN_RESUME: ieee80211_scan_state_resume(local, &next_delay); |
142b9f507 mac80211: impleme... |
1011 |
break; |
cd2bb512c mac80211: add sup... |
1012 1013 1014 |
case SCAN_ABORT: aborted = true; goto out_complete; |
f502d09b7 mac80211: advance... |
1015 1016 |
} } while (next_delay == 0); |
0a51b27e9 mac80211: start m... |
1017 |
|
42935ecaf mac80211: redefin... |
1018 |
ieee80211_queue_delayed_work(&local->hw, &local->scan_work, next_delay); |
d07bfd8b6 mac80211: fix sca... |
1019 |
goto out; |
259b62e35 mac80211: reduce ... |
1020 1021 |
out_complete: |
8bd2a2489 mac80211: determi... |
1022 |
__ieee80211_scan_completed(&local->hw, aborted); |
259b62e35 mac80211: reduce ... |
1023 1024 |
out: mutex_unlock(&local->mtx); |
0a51b27e9 mac80211: start m... |
1025 |
} |
f3b85252f mac80211: fix sca... |
1026 1027 |
int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata, struct cfg80211_scan_request *req) |
0a51b27e9 mac80211: start m... |
1028 |
{ |
f3b85252f mac80211: fix sca... |
1029 |
int res; |
de95a54b1 mac80211: pass al... |
1030 |
|
a1699b75a mac80211: unify s... |
1031 |
mutex_lock(&sdata->local->mtx); |
f3b85252f mac80211: fix sca... |
1032 |
res = __ieee80211_start_scan(sdata, req); |
a1699b75a mac80211: unify s... |
1033 |
mutex_unlock(&sdata->local->mtx); |
0a51b27e9 mac80211: start m... |
1034 |
|
f3b85252f mac80211: fix sca... |
1035 |
return res; |
0a51b27e9 mac80211: start m... |
1036 |
} |
34bcf7150 mac80211: fix ibs... |
1037 1038 |
int ieee80211_request_ibss_scan(struct ieee80211_sub_if_data *sdata, const u8 *ssid, u8 ssid_len, |
76bed0f43 mac80211: IBSS fi... |
1039 1040 |
struct ieee80211_channel **channels, unsigned int n_channels, |
7ca15a0ae mac80211: allow s... |
1041 |
enum nl80211_bss_scan_width scan_width) |
0a51b27e9 mac80211: start m... |
1042 |
{ |
0a51b27e9 mac80211: start m... |
1043 |
struct ieee80211_local *local = sdata->local; |
76bed0f43 mac80211: IBSS fi... |
1044 |
int ret = -EBUSY, i, n_ch = 0; |
57fbcce37 cfg80211: remove ... |
1045 |
enum nl80211_band band; |
2a5193119 cfg80211/nl80211:... |
1046 |
|
a1699b75a mac80211: unify s... |
1047 |
mutex_lock(&local->mtx); |
0a51b27e9 mac80211: start m... |
1048 |
|
f3b85252f mac80211: fix sca... |
1049 1050 1051 |
/* busy scanning */ if (local->scan_req) goto unlock; |
9116dd011 mac80211: clarify... |
1052 |
|
be4a4b6a5 mac80211: improve... |
1053 |
/* fill internal scan request */ |
76bed0f43 mac80211: IBSS fi... |
1054 1055 |
if (!channels) { int max_n; |
be4a4b6a5 mac80211: improve... |
1056 |
|
57fbcce37 cfg80211: remove ... |
1057 |
for (band = 0; band < NUM_NL80211_BANDS; band++) { |
be4a4b6a5 mac80211: improve... |
1058 1059 |
if (!local->hw.wiphy->bands[band]) continue; |
34bcf7150 mac80211: fix ibs... |
1060 1061 1062 1063 |
max_n = local->hw.wiphy->bands[band]->n_channels; for (i = 0; i < max_n; i++) { struct ieee80211_channel *tmp_ch = |
be4a4b6a5 mac80211: improve... |
1064 |
&local->hw.wiphy->bands[band]->channels[i]; |
34bcf7150 mac80211: fix ibs... |
1065 |
|
8fe02e167 cfg80211: consoli... |
1066 |
if (tmp_ch->flags & (IEEE80211_CHAN_NO_IR | |
34bcf7150 mac80211: fix ibs... |
1067 1068 1069 1070 1071 |
IEEE80211_CHAN_DISABLED)) continue; local->int_scan_req->channels[n_ch] = tmp_ch; n_ch++; |
be4a4b6a5 mac80211: improve... |
1072 1073 |
} } |
34bcf7150 mac80211: fix ibs... |
1074 1075 1076 1077 |
if (WARN_ON_ONCE(n_ch == 0)) goto unlock; local->int_scan_req->n_channels = n_ch; |
be4a4b6a5 mac80211: improve... |
1078 |
} else { |
76bed0f43 mac80211: IBSS fi... |
1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 |
for (i = 0; i < n_channels; i++) { if (channels[i]->flags & (IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_DISABLED)) continue; local->int_scan_req->channels[n_ch] = channels[i]; n_ch++; } if (WARN_ON_ONCE(n_ch == 0)) |
34bcf7150 mac80211: fix ibs... |
1089 |
goto unlock; |
76bed0f43 mac80211: IBSS fi... |
1090 |
local->int_scan_req->n_channels = n_ch; |
be4a4b6a5 mac80211: improve... |
1091 1092 1093 1094 |
} local->int_scan_req->ssids = &local->scan_ssid; local->int_scan_req->n_ssids = 1; |
7ca15a0ae mac80211: allow s... |
1095 |
local->int_scan_req->scan_width = scan_width; |
5ba63533b cfg80211: fix ali... |
1096 1097 |
memcpy(local->int_scan_req->ssids[0].ssid, ssid, IEEE80211_MAX_SSID_LEN); local->int_scan_req->ssids[0].ssid_len = ssid_len; |
9116dd011 mac80211: clarify... |
1098 |
|
5ba63533b cfg80211: fix ali... |
1099 |
ret = __ieee80211_start_scan(sdata, sdata->local->int_scan_req); |
f3b85252f mac80211: fix sca... |
1100 |
unlock: |
a1699b75a mac80211: unify s... |
1101 |
mutex_unlock(&local->mtx); |
f3b85252f mac80211: fix sca... |
1102 |
return ret; |
0a51b27e9 mac80211: start m... |
1103 |
} |
5bb644a0f mac80211: cancel/... |
1104 |
|
4136c4224 mac80211: assure ... |
1105 1106 1107 |
/* * Only call this function when a scan can't be queued -- under RTNL. */ |
5bb644a0f mac80211: cancel/... |
1108 1109 |
void ieee80211_scan_cancel(struct ieee80211_local *local) { |
5bb644a0f mac80211: cancel/... |
1110 |
/* |
b856439b1 mac80211: add can... |
1111 |
* We are canceling software scan, or deferred scan that was not |
4136c4224 mac80211: assure ... |
1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 |
* yet really started (see __ieee80211_start_scan ). * * Regarding hardware scan: * - we can not call __ieee80211_scan_completed() as when * SCAN_HW_SCANNING bit is set this function change * local->hw_scan_req to operate on 5G band, what race with * driver which can use local->hw_scan_req * * - we can not cancel scan_work since driver can schedule it * by ieee80211_scan_completed(..., true) to finish scan * |
b856439b1 mac80211: add can... |
1123 1124 1125 |
* Hence we only call the cancel_hw_scan() callback, but the low-level * driver is still responsible for calling ieee80211_scan_completed() * after the scan was completed/aborted. |
5bb644a0f mac80211: cancel/... |
1126 |
*/ |
4136c4224 mac80211: assure ... |
1127 |
|
a1699b75a mac80211: unify s... |
1128 |
mutex_lock(&local->mtx); |
b856439b1 mac80211: add can... |
1129 1130 |
if (!local->scan_req) goto out; |
a754055a1 mac80211: correct... |
1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 |
/* * We have a scan running and the driver already reported completion, * but the worker hasn't run yet or is stuck on the mutex - mark it as * cancelled. */ if (test_bit(SCAN_HW_SCANNING, &local->scanning) && test_bit(SCAN_COMPLETED, &local->scanning)) { set_bit(SCAN_HW_CANCELLED, &local->scanning); goto out; } |
b856439b1 mac80211: add can... |
1141 |
if (test_bit(SCAN_HW_SCANNING, &local->scanning)) { |
a754055a1 mac80211: correct... |
1142 1143 1144 1145 1146 |
/* * Make sure that __ieee80211_scan_completed doesn't trigger a * scan on another band. */ set_bit(SCAN_HW_CANCELLED, &local->scanning); |
b856439b1 mac80211: add can... |
1147 |
if (local->ops->cancel_hw_scan) |
e2fd5dbc1 mac80211: make sc... |
1148 1149 1150 |
drv_cancel_hw_scan(local, rcu_dereference_protected(local->scan_sdata, lockdep_is_held(&local->mtx))); |
b856439b1 mac80211: add can... |
1151 |
goto out; |
4136c4224 mac80211: assure ... |
1152 |
} |
b856439b1 mac80211: add can... |
1153 1154 1155 1156 1157 1158 1159 1160 |
/* * If the work is currently running, it must be blocked on * the mutex, but we'll set scan_sdata = NULL and it'll * simply exit once it acquires the mutex. */ cancel_delayed_work(&local->scan_work); /* and clean up */ |
7947d3e07 mac80211: Add sup... |
1161 |
memset(&local->scan_info, 0, sizeof(local->scan_info)); |
8bd2a2489 mac80211: determi... |
1162 |
__ieee80211_scan_completed(&local->hw, true); |
b856439b1 mac80211: add can... |
1163 |
out: |
d07bfd8b6 mac80211: fix sca... |
1164 |
mutex_unlock(&local->mtx); |
5bb644a0f mac80211: cancel/... |
1165 |
} |
79f460ca4 mac80211: add sup... |
1166 |
|
d43c6b6e6 mac80211: resched... |
1167 1168 |
int __ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata, struct cfg80211_sched_scan_request *req) |
79f460ca4 mac80211: add sup... |
1169 1170 |
{ struct ieee80211_local *local = sdata->local; |
633e27132 mac80211: split s... |
1171 |
struct ieee80211_scan_ies sched_scan_ies = {}; |
2103dec14 mac80211: select ... |
1172 |
struct cfg80211_chan_def chandef; |
633e27132 mac80211: split s... |
1173 |
int ret, i, iebufsz, num_bands = 0; |
57fbcce37 cfg80211: remove ... |
1174 |
u32 rate_masks[NUM_NL80211_BANDS] = {}; |
633e27132 mac80211: split s... |
1175 1176 |
u8 bands_used = 0; u8 *ie; |
b9771d41a mac80211: support... |
1177 |
u32 flags = 0; |
c604b9f21 mac80211: make ie... |
1178 |
|
e4dcbb375 mac80211: fix IE ... |
1179 |
iebufsz = local->scan_ies_len + req->ie_len; |
79f460ca4 mac80211: add sup... |
1180 |
|
d43c6b6e6 mac80211: resched... |
1181 |
lockdep_assert_held(&local->mtx); |
79f460ca4 mac80211: add sup... |
1182 |
|
d43c6b6e6 mac80211: resched... |
1183 1184 |
if (!local->ops->sched_scan_start) return -ENOTSUPP; |
79f460ca4 mac80211: add sup... |
1185 |
|
57fbcce37 cfg80211: remove ... |
1186 |
for (i = 0; i < NUM_NL80211_BANDS; i++) { |
633e27132 mac80211: split s... |
1187 1188 1189 1190 |
if (local->hw.wiphy->bands[i]) { bands_used |= BIT(i); rate_masks[i] = (u32) -1; num_bands++; |
79f460ca4 mac80211: add sup... |
1191 |
} |
633e27132 mac80211: split s... |
1192 |
} |
79f460ca4 mac80211: add sup... |
1193 |
|
b9771d41a mac80211: support... |
1194 1195 |
if (req->flags & NL80211_SCAN_FLAG_MIN_PREQ_CONTENT) flags |= IEEE80211_PROBE_FLAG_MIN_CONTENT; |
6396bb221 treewide: kzalloc... |
1196 |
ie = kcalloc(iebufsz, num_bands, GFP_KERNEL); |
633e27132 mac80211: split s... |
1197 1198 1199 |
if (!ie) { ret = -ENOMEM; goto out; |
79f460ca4 mac80211: add sup... |
1200 |
} |
633e27132 mac80211: split s... |
1201 |
ieee80211_prepare_scan_chandef(&chandef, req->scan_width); |
cd5861bde mac80211: Remove ... |
1202 1203 |
ieee80211_build_preq_ies(local, ie, num_bands * iebufsz, &sched_scan_ies, req->ie, |
00387f321 mac80211: add pro... |
1204 |
req->ie_len, bands_used, rate_masks, &chandef, |
b9771d41a mac80211: support... |
1205 |
flags); |
633e27132 mac80211: split s... |
1206 |
|
30dd3edf9 mac80211: don't h... |
1207 |
ret = drv_sched_scan_start(local, sdata, req, &sched_scan_ies); |
d43c6b6e6 mac80211: resched... |
1208 |
if (ret == 0) { |
5260a5b2c mac80211: track s... |
1209 |
rcu_assign_pointer(local->sched_scan_sdata, sdata); |
6ea0a69ca mac80211: rcu-ify... |
1210 |
rcu_assign_pointer(local->sched_scan_req, req); |
d43c6b6e6 mac80211: resched... |
1211 |
} |
79f460ca4 mac80211: add sup... |
1212 |
|
633e27132 mac80211: split s... |
1213 |
kfree(ie); |
d43c6b6e6 mac80211: resched... |
1214 |
|
633e27132 mac80211: split s... |
1215 |
out: |
d43c6b6e6 mac80211: resched... |
1216 1217 |
if (ret) { /* Clean in case of failure after HW restart or upon resume. */ |
0c2bef462 mac80211: use RCU... |
1218 |
RCU_INIT_POINTER(local->sched_scan_sdata, NULL); |
6ea0a69ca mac80211: rcu-ify... |
1219 |
RCU_INIT_POINTER(local->sched_scan_req, NULL); |
d43c6b6e6 mac80211: resched... |
1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 |
} return ret; } int ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata, struct cfg80211_sched_scan_request *req) { struct ieee80211_local *local = sdata->local; int ret; mutex_lock(&local->mtx); if (rcu_access_pointer(local->sched_scan_sdata)) { mutex_unlock(&local->mtx); return -EBUSY; } ret = __ieee80211_request_sched_scan_start(sdata, req); |
5260a5b2c mac80211: track s... |
1239 |
mutex_unlock(&local->mtx); |
79f460ca4 mac80211: add sup... |
1240 1241 |
return ret; } |
0d440ea29 mac80211: don't r... |
1242 |
int ieee80211_request_sched_scan_stop(struct ieee80211_local *local) |
79f460ca4 mac80211: add sup... |
1243 |
{ |
0d440ea29 mac80211: don't r... |
1244 1245 |
struct ieee80211_sub_if_data *sched_scan_sdata; int ret = -ENOENT; |
79f460ca4 mac80211: add sup... |
1246 |
|
5260a5b2c mac80211: track s... |
1247 |
mutex_lock(&local->mtx); |
79f460ca4 mac80211: add sup... |
1248 1249 1250 1251 1252 |
if (!local->ops->sched_scan_stop) { ret = -ENOTSUPP; goto out; } |
d43c6b6e6 mac80211: resched... |
1253 |
/* We don't want to restart sched scan anymore. */ |
6ea0a69ca mac80211: rcu-ify... |
1254 |
RCU_INIT_POINTER(local->sched_scan_req, NULL); |
d43c6b6e6 mac80211: resched... |
1255 |
|
0d440ea29 mac80211: don't r... |
1256 1257 1258 1259 |
sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata, lockdep_is_held(&local->mtx)); if (sched_scan_sdata) { ret = drv_sched_scan_stop(local, sched_scan_sdata); |
71228a1ea mac80211: release... |
1260 |
if (!ret) |
ad053a962 mac80211: scan: R... |
1261 |
RCU_INIT_POINTER(local->sched_scan_sdata, NULL); |
71228a1ea mac80211: release... |
1262 |
} |
79f460ca4 mac80211: add sup... |
1263 |
out: |
5260a5b2c mac80211: track s... |
1264 |
mutex_unlock(&local->mtx); |
79f460ca4 mac80211: add sup... |
1265 1266 1267 1268 1269 1270 1271 1272 1273 |
return ret; } void ieee80211_sched_scan_results(struct ieee80211_hw *hw) { struct ieee80211_local *local = hw_to_local(hw); trace_api_sched_scan_results(local); |
b34939b98 cfg80211: add req... |
1274 |
cfg80211_sched_scan_results(hw->wiphy, 0); |
79f460ca4 mac80211: add sup... |
1275 1276 |
} EXPORT_SYMBOL(ieee80211_sched_scan_results); |
f6837ba8c mac80211: handle ... |
1277 |
void ieee80211_sched_scan_end(struct ieee80211_local *local) |
85a9994a0 cfg80211/mac80211... |
1278 |
{ |
85a9994a0 cfg80211/mac80211... |
1279 |
mutex_lock(&local->mtx); |
5260a5b2c mac80211: track s... |
1280 |
if (!rcu_access_pointer(local->sched_scan_sdata)) { |
85a9994a0 cfg80211/mac80211... |
1281 1282 1283 |
mutex_unlock(&local->mtx); return; } |
0c2bef462 mac80211: use RCU... |
1284 |
RCU_INIT_POINTER(local->sched_scan_sdata, NULL); |
85a9994a0 cfg80211/mac80211... |
1285 |
|
d43c6b6e6 mac80211: resched... |
1286 |
/* If sched scan was aborted by the driver. */ |
6ea0a69ca mac80211: rcu-ify... |
1287 |
RCU_INIT_POINTER(local->sched_scan_req, NULL); |
d43c6b6e6 mac80211: resched... |
1288 |
|
85a9994a0 cfg80211/mac80211... |
1289 |
mutex_unlock(&local->mtx); |
b34939b98 cfg80211: add req... |
1290 |
cfg80211_sched_scan_stopped(local->hw.wiphy, 0); |
85a9994a0 cfg80211/mac80211... |
1291 |
} |
f6837ba8c mac80211: handle ... |
1292 1293 1294 1295 1296 1297 1298 1299 |
void ieee80211_sched_scan_stopped_work(struct work_struct *work) { struct ieee80211_local *local = container_of(work, struct ieee80211_local, sched_scan_stopped_work); ieee80211_sched_scan_end(local); } |
79f460ca4 mac80211: add sup... |
1300 1301 1302 1303 1304 |
void ieee80211_sched_scan_stopped(struct ieee80211_hw *hw) { struct ieee80211_local *local = hw_to_local(hw); trace_api_sched_scan_stopped(local); |
2bc533bd9 mac80211: handle ... |
1305 1306 1307 1308 1309 1310 1311 |
/* * this shouldn't really happen, so for simplicity * simply ignore it, and let mac80211 reconfigure * the sched scan later on. */ if (local->in_reconfig) return; |
18db594a1 mac80211: fix sch... |
1312 |
schedule_work(&local->sched_scan_stopped_work); |
79f460ca4 mac80211: add sup... |
1313 1314 |
} EXPORT_SYMBOL(ieee80211_sched_scan_stopped); |